From 87bd68b69709630f0f80b41a1f173e3b6ed9d143 Mon Sep 17 00:00:00 2001 From: Gregor Haas Date: Sun, 5 Jan 2020 16:13:19 -0500 Subject: [PATCH] Remove custom libusb, never really modified it --- CMakeLists.txt | 9 - c8_libusb/COPYING | 504 ------ c8_libusb/src/core.c | 2740 ---------------------------- c8_libusb/src/descriptor.c | 1193 ------------ c8_libusb/src/hotplug.c | 373 ---- c8_libusb/src/hotplug.h | 99 - c8_libusb/src/io.c | 2866 ----------------------------- c8_libusb/src/libusb-1.0.def | 178 -- c8_libusb/src/libusb-1.0.rc | 61 - c8_libusb/src/libusbi.h | 1210 ------------- c8_libusb/src/os/linux_netlink.c | 409 ----- c8_libusb/src/os/linux_udev.c | 329 ---- c8_libusb/src/os/linux_usbfs.c | 2899 ------------------------------ c8_libusb/src/os/linux_usbfs.h | 194 -- c8_libusb/src/os/poll_posix.c | 84 - c8_libusb/src/os/poll_posix.h | 14 - c8_libusb/src/os/threads_posix.c | 80 - c8_libusb/src/os/threads_posix.h | 102 -- c8_libusb/src/strerror.c | 233 --- c8_libusb/src/sync.c | 334 ---- c8_libusb/src/version.h | 18 - c8_libusb/src/version_nano.h | 1 - c8_remote/CMakeLists.txt | 2 +- c8_remote/include/usb_helpers.h | 2 - c8_remote/src/usb_helpers.c | 3 +- 25 files changed, 2 insertions(+), 13935 deletions(-) delete mode 100644 c8_libusb/COPYING delete mode 100644 c8_libusb/src/core.c delete mode 100644 c8_libusb/src/descriptor.c delete mode 100644 c8_libusb/src/hotplug.c delete mode 100644 c8_libusb/src/hotplug.h delete mode 100644 c8_libusb/src/io.c delete mode 100644 c8_libusb/src/libusb-1.0.def delete mode 100644 c8_libusb/src/libusb-1.0.rc delete mode 100644 c8_libusb/src/libusbi.h delete mode 100644 c8_libusb/src/os/linux_netlink.c delete mode 100644 c8_libusb/src/os/linux_udev.c delete mode 100644 c8_libusb/src/os/linux_usbfs.c delete mode 100644 c8_libusb/src/os/linux_usbfs.h delete mode 100644 c8_libusb/src/os/poll_posix.c delete mode 100644 c8_libusb/src/os/poll_posix.h delete mode 100644 c8_libusb/src/os/threads_posix.c delete mode 100644 c8_libusb/src/os/threads_posix.h delete mode 100644 c8_libusb/src/strerror.c delete mode 100644 c8_libusb/src/sync.c delete mode 100644 c8_libusb/src/version.h delete mode 100644 c8_libusb/src/version_nano.h diff --git a/CMakeLists.txt b/CMakeLists.txt index 504b9b1..a553ac4 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -3,14 +3,5 @@ project(checkm8_tool) enable_language(C) include_directories(include) -include_directories(c8_libusb/src) -include_directories(c8_libusb/src/os) -add_library(checkm8_libusb - c8_libusb/src/core.c c8_libusb/src/descriptor.c c8_libusb/src/hotplug.c - c8_libusb/src/io.c c8_libusb/src/strerror.c c8_libusb/src/sync.c - - c8_libusb/src/os/linux_netlink.c c8_libusb/src/os/linux_usbfs.c c8_libusb/src/os/linux_udev.c - c8_libusb/src/os/threads_posix.c c8_libusb/src/os/poll_posix.c) - add_subdirectory(c8_remote) add_subdirectory(c8_payloads) diff --git a/c8_libusb/COPYING b/c8_libusb/COPYING deleted file mode 100644 index 5ab7695..0000000 --- a/c8_libusb/COPYING +++ /dev/null @@ -1,504 +0,0 @@ - GNU LESSER GENERAL PUBLIC LICENSE - Version 2.1, February 1999 - - Copyright (C) 1991, 1999 Free Software Foundation, Inc. - 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - Everyone is permitted to copy and distribute verbatim copies - of this license document, but changing it is not allowed. - -[This is the first released version of the Lesser GPL. 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See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include "libusb_config.h" - -#include -#include -#include -#include -#include -#ifdef HAVE_SYS_TYPES_H -#include -#endif -#ifdef HAVE_SYS_TIME_H -#include -#endif -#ifdef HAVE_SYSLOG_H -#include -#endif - -#ifdef __ANDROID__ -#include -#endif - -#include "libusbi.h" -#include "hotplug.h" - -struct libusb_context *usbi_default_context = NULL; -static const struct libusb_version libusb_version_internal = - { LIBUSB_MAJOR, LIBUSB_MINOR, LIBUSB_MICRO, LIBUSB_NANO, - LIBUSB_RC, "http://src.info" }; -static int default_context_refcnt = 0; -static usbi_mutex_static_t default_context_lock = USBI_MUTEX_INITIALIZER; -static struct timespec timestamp_origin = { 0, 0 }; -#ifndef USE_SYSTEM_LOGGING_FACILITY -static libusb_log_cb log_handler = NULL; -#endif - -usbi_mutex_static_t active_contexts_lock = USBI_MUTEX_INITIALIZER; -struct list_head active_contexts_list; - -/** - * \mainpage src-1.0 API Reference - * - * \section intro Introduction - * - * src is an open source library that allows you to communicate with USB - * devices from userspace. For more info, see the - * src homepage. - * - * This documentation is aimed at application developers wishing to - * communicate with USB peripherals from their own software. After reviewing - * this documentation, feedback and questions can be sent to the - * src-devel mailing list. - * - * This documentation assumes knowledge of how to operate USB devices from - * a software standpoint (descriptors, configurations, interfaces, endpoints, - * control/bulk/interrupt/isochronous transfers, etc). Full information - * can be found in the USB 3.0 - * Specification which is available for free download. You can probably - * find less verbose introductions by searching the web. - * - * \section API Application Programming Interface (API) - * - * See the \ref libusb_api page for a complete list of the src functions. - * - * \section features Library features - * - * - All transfer types supported (control/bulk/interrupt/isochronous) - * - 2 transfer interfaces: - * -# Synchronous (simple) - * -# Asynchronous (more complicated, but more powerful) - * - Thread safe (although the asynchronous interface means that you - * usually won't need to thread) - * - Lightweight with lean API - * - Compatible with src-0.1 through the src-compat-0.1 translation layer - * - Hotplug support (on some platforms). See \ref libusb_hotplug. - * - * \section gettingstarted Getting Started - * - * To begin reading the API documentation, start with the Modules page which - * links to the different categories of src's functionality. - * - * One decision you will have to make is whether to use the synchronous - * or the asynchronous data transfer interface. The \ref libusb_io documentation - * provides some insight into this topic. - * - * Some example programs can be found in the src source distribution under - * the "examples" subdirectory. The src homepage includes a list of - * real-life project examples which use src. - * - * \section errorhandling Error handling - * - * src functions typically return 0 on success or a negative error code - * on failure. These negative error codes relate to LIBUSB_ERROR constants - * which are listed on the \ref libusb_misc "miscellaneous" documentation page. - * - * \section msglog Debug message logging - * - * src uses stderr for all logging. By default, logging is set to NONE, - * which means that no output will be produced. However, unless the library - * has been compiled with logging disabled, then any application calls to - * libusb_set_option(ctx, LIBUSB_OPTION_LOG_LEVEL, level), or the setting of the - * environmental variable LIBUSB_DEBUG outside of the application, can result - * in logging being produced. Your application should therefore not close - * stderr, but instead direct it to the null device if its output is - * undesirable. - * - * The libusb_set_option(ctx, LIBUSB_OPTION_LOG_LEVEL, level) function can be - * used to enable logging of certain messages. Under standard configuration, - * src doesn't really log much so you are advised to use this function - * to enable all error/warning/ informational messages. It will help debug - * problems with your software. - * - * The logged messages are unstructured. There is no one-to-one correspondence - * between messages being logged and success or failure return codes from - * src functions. There is no format to the messages, so you should not - * try to capture or parse them. They are not and will not be localized. - * These messages are not intended to being passed to your application user; - * instead, you should interpret the error codes returned from src functions - * and provide appropriate notification to the user. The messages are simply - * there to aid you as a programmer, and if you're confused because you're - * getting a strange error code from a src function, enabling message - * logging may give you a suitable explanation. - * - * The LIBUSB_DEBUG environment variable can be used to enable message logging - * at run-time. This environment variable should be set to a log level number, - * which is interpreted the same as the - * libusb_set_option(ctx, LIBUSB_OPTION_LOG_LEVEL, level) parameter. When this - * environment variable is set, the message logging verbosity level is fixed - * and libusb_set_option(ctx, LIBUSB_OPTION_LOG_LEVEL, level) effectively does - * nothing. - * - * src can be compiled without any logging functions, useful for embedded - * systems. In this case, libusb_set_option(ctx, LIBUSB_OPTION_LOG_LEVEL, level) - * and the LIBUSB_DEBUG environment variable have no effects. - * - * src can also be compiled with verbose debugging messages always. When - * the library is compiled in this way, all messages of all verbosities are - * always logged. libusb_set_option(ctx, LIBUSB_OPTION_LOG_LEVEL, level) and - * the LIBUSB_DEBUG environment variable have no effects. - * - * \section remarks Other remarks - * - * src does have imperfections. The \ref libusb_caveats "caveats" page attempts - * to document these. - */ - -/** - * \page libusb_caveats Caveats - * - * \section fork Fork considerations - * - * src is not designed to work across fork() calls. Depending on - * the platform, there may be resources in the parent process that are not - * available to the child (e.g. the hotplug monitor thread on Linux). In - * addition, since the parent and child will share src's internal file - * descriptors, using src in any way from the child could cause the parent - * process's \ref libusb_context to get into an inconsistent state. - * - * On Linux, src's file descriptors will be marked as CLOEXEC, which means - * that it is safe to fork() and exec() without worrying about the child - * process needing to clean up state or having access to these file descriptors. - * Other platforms may not be so forgiving, so consider yourself warned! - * - * \section devresets Device resets - * - * The libusb_reset_device() function allows you to reset a device. If your - * program has to call such a function, it should obviously be aware that - * the reset will cause device state to change (e.g. register values may be - * reset). - * - * The problem is that any other program could reset the device your program - * is working with, at any time. src does not offer a mechanism to inform - * you when this has happened, so if someone else resets your device it will - * not be clear to your own program why the device state has changed. - * - * Ultimately, this is a limitation of writing drivers in userspace. - * Separation from the USB stack in the underlying kernel makes it difficult - * for the operating system to deliver such notifications to your program. - * The Linux kernel USB stack allows such reset notifications to be delivered - * to in-kernel USB drivers, but it is not clear how such notifications could - * be delivered to second-class drivers that live in userspace. - * - * \section blockonly Blocking-only functionality - * - * The functionality listed below is only available through synchronous, - * blocking functions. There are no asynchronous/non-blocking alternatives, - * and no clear ways of implementing these. - * - * - Configuration activation (libusb_set_configuration()) - * - Interface/alternate setting activation (libusb_set_interface_alt_setting()) - * - Releasing of interfaces (libusb_release_interface()) - * - Clearing of halt/stall condition (libusb_clear_halt()) - * - Device resets (libusb_reset_device()) - * - * \section configsel Configuration selection and handling - * - * When src presents a device handle to an application, there is a chance - * that the corresponding device may be in unconfigured state. For devices - * with multiple configurations, there is also a chance that the configuration - * currently selected is not the one that the application wants to use. - * - * The obvious solution is to add a call to libusb_set_configuration() early - * on during your device initialization routines, but there are caveats to - * be aware of: - * -# If the device is already in the desired configuration, calling - * libusb_set_configuration() using the same configuration value will cause - * a lightweight device reset. This may not be desirable behaviour. - * -# In the case where the desired configuration is already active, src - * may not even be able to perform a lightweight device reset. For example, - * take my USB keyboard with fingerprint reader: I'm interested in driving - * the fingerprint reader interface through src, but the kernel's - * USB-HID driver will almost always have claimed the keyboard interface. - * Because the kernel has claimed an interface, it is not even possible to - * perform the lightweight device reset, so libusb_set_configuration() will - * fail. (Luckily the device in question only has a single configuration.) - * -# src will be unable to set a configuration if other programs or - * drivers have claimed interfaces. In particular, this means that kernel - * drivers must be detached from all the interfaces before - * libusb_set_configuration() may succeed. - * - * One solution to some of the above problems is to consider the currently - * active configuration. If the configuration we want is already active, then - * we don't have to select any configuration: -\code -cfg = -1; -libusb_get_configuration(dev, &cfg); -if (cfg != desired) - libusb_set_configuration(dev, desired); -\endcode - * - * This is probably suitable for most scenarios, but is inherently racy: - * another application or driver may change the selected configuration - * after the libusb_get_configuration() call. - * - * Even in cases where libusb_set_configuration() succeeds, consider that other - * applications or drivers may change configuration after your application - * calls libusb_set_configuration(). - * - * One possible way to lock your device into a specific configuration is as - * follows: - * -# Set the desired configuration (or use the logic above to realise that - * it is already in the desired configuration) - * -# Claim the interface that you wish to use - * -# Check that the currently active configuration is the one that you want - * to use. - * - * The above method works because once an interface is claimed, no application - * or driver is able to select another configuration. - * - * \section earlycomp Early transfer completion - * - * NOTE: This section is currently Linux-centric. I am not sure if any of these - * considerations apply to Darwin or other platforms. - * - * When a transfer completes early (i.e. when less data is received/sent in - * any one packet than the transfer buffer allows for) then src is designed - * to terminate the transfer immediately, not transferring or receiving any - * more data unless other transfers have been queued by the user. - * - * On legacy platforms, src is unable to do this in all situations. After - * the incomplete packet occurs, "surplus" data may be transferred. For recent - * versions of src, this information is kept (the data length of the - * transfer is updated) and, for device-to-host transfers, any surplus data was - * added to the buffer. Still, this is not a nice solution because it loses the - * information about the end of the short packet, and the user probably wanted - * that surplus data to arrive in the next logical transfer. - * - * \section zlp Zero length packets - * - * - src is able to send a packet of zero length to an endpoint simply by - * submitting a transfer of zero length. - * - The \ref libusb_transfer_flags::LIBUSB_TRANSFER_ADD_ZERO_PACKET - * "LIBUSB_TRANSFER_ADD_ZERO_PACKET" flag is currently only supported on Linux. - */ - -/** - * \page libusb_contexts Contexts - * - * It is possible that src may be used simultaneously from two independent - * libraries linked into the same executable. For example, if your application - * has a plugin-like system which allows the user to dynamically load a range - * of modules into your program, it is feasible that two independently - * developed modules may both use src. - * - * src is written to allow for these multiple user scenarios. The two - * "instances" of src will not interfere: libusb_set_option() calls - * from one user will not affect the same settings for other users, other - * users can continue using src after one of them calls libusb_exit(), etc. - * - * This is made possible through src's context concept. When you - * call libusb_init(), you are (optionally) given a context. You can then pass - * this context pointer back into future src functions. - * - * In order to keep things simple for more simplistic applications, it is - * legal to pass NULL to all functions requiring a context pointer (as long as - * you're sure no other code will attempt to use src from the same process). - * When you pass NULL, the default context will be used. The default context - * is created the first time a process calls libusb_init() when no other - * context is alive. Contexts are destroyed during libusb_exit(). - * - * The default context is reference-counted and can be shared. That means that - * if libusb_init(NULL) is called twice within the same process, the two - * users end up sharing the same context. The deinitialization and freeing of - * the default context will only happen when the last user calls libusb_exit(). - * In other words, the default context is created and initialized when its - * reference count goes from 0 to 1, and is deinitialized and destroyed when - * its reference count goes from 1 to 0. - * - * You may be wondering why only a subset of src functions require a - * context pointer in their function definition. Internally, src stores - * context pointers in other objects (e.g. libusb_device instances) and hence - * can infer the context from those objects. - */ - - /** - * \page libusb_api Application Programming Interface - * - * This is the complete list of src functions, structures and - * enumerations in alphabetical order. - * - * \section Functions - * - libusb_alloc_streams() - * - libusb_alloc_transfer() - * - libusb_attach_kernel_driver() - * - libusb_bulk_transfer() - * - libusb_cancel_transfer() - * - libusb_claim_interface() - * - libusb_clear_halt() - * - libusb_close() - * - libusb_control_transfer() - * - libusb_control_transfer_get_data() - * - libusb_control_transfer_get_setup() - * - libusb_cpu_to_le16() - * - libusb_detach_kernel_driver() - * - libusb_dev_mem_alloc() - * - libusb_dev_mem_free() - * - libusb_error_name() - * - libusb_event_handler_active() - * - libusb_event_handling_ok() - * - libusb_exit() - * - libusb_fill_bulk_stream_transfer() - * - libusb_fill_bulk_transfer() - * - libusb_fill_control_setup() - * - libusb_fill_control_transfer() - * - libusb_fill_interrupt_transfer() - * - libusb_fill_iso_transfer() - * - libusb_free_bos_descriptor() - * - libusb_free_config_descriptor() - * - libusb_free_container_id_descriptor() - * - libusb_free_device_list() - * - libusb_free_pollfds() - * - libusb_free_ss_endpoint_companion_descriptor() - * - libusb_free_ss_usb_device_capability_descriptor() - * - libusb_free_streams() - * - libusb_free_transfer() - * - libusb_free_usb_2_0_extension_descriptor() - * - libusb_get_active_config_descriptor() - * - libusb_get_bos_descriptor() - * - libusb_get_bus_number() - * - libusb_get_config_descriptor() - * - libusb_get_config_descriptor_by_value() - * - libusb_get_configuration() - * - libusb_get_container_id_descriptor() - * - libusb_get_descriptor() - * - libusb_get_device() - * - libusb_get_device_address() - * - libusb_get_device_descriptor() - * - libusb_get_device_list() - * - libusb_get_device_speed() - * - libusb_get_iso_packet_buffer() - * - libusb_get_iso_packet_buffer_simple() - * - libusb_get_max_iso_packet_size() - * - libusb_get_max_packet_size() - * - libusb_get_next_timeout() - * - libusb_get_parent() - * - libusb_get_pollfds() - * - libusb_get_port_number() - * - libusb_get_port_numbers() - * - libusb_get_port_path() - * - libusb_get_ss_endpoint_companion_descriptor() - * - libusb_get_ss_usb_device_capability_descriptor() - * - libusb_get_string_descriptor() - * - libusb_get_string_descriptor_ascii() - * - libusb_get_usb_2_0_extension_descriptor() - * - libusb_get_version() - * - libusb_handle_events() - * - libusb_handle_events_completed() - * - libusb_handle_events_locked() - * - libusb_handle_events_timeout() - * - libusb_handle_events_timeout_completed() - * - libusb_has_capability() - * - libusb_hotplug_deregister_callback() - * - libusb_hotplug_register_callback() - * - libusb_init() - * - libusb_interrupt_event_handler() - * - libusb_interrupt_transfer() - * - libusb_kernel_driver_active() - * - libusb_lock_events() - * - libusb_lock_event_waiters() - * - libusb_open() - * - libusb_open_device_with_vid_pid() - * - libusb_pollfds_handle_timeouts() - * - libusb_ref_device() - * - libusb_release_interface() - * - libusb_reset_device() - * - libusb_set_auto_detach_kernel_driver() - * - libusb_set_configuration() - * - libusb_set_debug() - * - libusb_set_log_cb() - * - libusb_set_interface_alt_setting() - * - libusb_set_iso_packet_lengths() - * - libusb_set_option() - * - libusb_setlocale() - * - libusb_set_pollfd_notifiers() - * - libusb_strerror() - * - libusb_submit_transfer() - * - libusb_transfer_get_stream_id() - * - libusb_transfer_set_stream_id() - * - libusb_try_lock_events() - * - libusb_unlock_events() - * - libusb_unlock_event_waiters() - * - libusb_unref_device() - * - libusb_wait_for_event() - * - * \section Structures - * - libusb_bos_descriptor - * - libusb_bos_dev_capability_descriptor - * - libusb_config_descriptor - * - libusb_container_id_descriptor - * - \ref libusb_context - * - libusb_control_setup - * - \ref libusb_device - * - libusb_device_descriptor - * - \ref libusb_device_handle - * - libusb_endpoint_descriptor - * - libusb_interface - * - libusb_interface_descriptor - * - libusb_iso_packet_descriptor - * - libusb_pollfd - * - libusb_ss_endpoint_companion_descriptor - * - libusb_ss_usb_device_capability_descriptor - * - libusb_transfer - * - libusb_usb_2_0_extension_descriptor - * - libusb_version - * - * \section Enums - * - \ref libusb_bos_type - * - \ref libusb_capability - * - \ref libusb_class_code - * - \ref libusb_descriptor_type - * - \ref libusb_endpoint_direction - * - \ref libusb_error - * - \ref libusb_iso_sync_type - * - \ref libusb_iso_usage_type - * - \ref libusb_log_level - * - \ref libusb_option - * - \ref libusb_request_recipient - * - \ref libusb_request_type - * - \ref libusb_speed - * - \ref libusb_ss_usb_device_capability_attributes - * - \ref libusb_standard_request - * - \ref libusb_supported_speed - * - \ref libusb_transfer_flags - * - \ref libusb_transfer_status - * - \ref libusb_transfer_type - * - \ref libusb_usb_2_0_extension_attributes - */ - -/** - * @defgroup libusb_lib Library initialization/deinitialization - * This page details how to initialize and deinitialize src. Initialization - * must be performed before using any src functionality, and similarly you - * must not call any src functions after deinitialization. - */ - -/** - * @defgroup libusb_dev Device handling and enumeration - * The functionality documented below is designed to help with the following - * operations: - * - Enumerating the USB devices currently attached to the system - * - Choosing a device to operate from your software - * - Opening and closing the chosen device - * - * \section nutshell In a nutshell... - * - * The description below really makes things sound more complicated than they - * actually are. The following sequence of function calls will be suitable - * for almost all scenarios and does not require you to have such a deep - * understanding of the resource management issues: - * \code -// discover devices -libusb_device **list; -libusb_device *found = NULL; -ssize_t cnt = libusb_get_device_list(NULL, &list); -ssize_t i = 0; -int err = 0; -if (cnt < 0) - error(); - -for (i = 0; i < cnt; i++) { - libusb_device *device = list[i]; - if (is_interesting(device)) { - found = device; - break; - } -} - -if (found) { - libusb_device_handle *handle; - - err = libusb_open(found, &handle); - if (err) - error(); - // etc -} - -libusb_free_device_list(list, 1); -\endcode - * - * The two important points: - * - You asked libusb_free_device_list() to unreference the devices (2nd - * parameter) - * - You opened the device before freeing the list and unreferencing the - * devices - * - * If you ended up with a handle, you can now proceed to perform I/O on the - * device. - * - * \section devshandles Devices and device handles - * src has a concept of a USB device, represented by the - * \ref libusb_device opaque type. A device represents a USB device that - * is currently or was previously connected to the system. Using a reference - * to a device, you can determine certain information about the device (e.g. - * you can read the descriptor data). - * - * The libusb_get_device_list() function can be used to obtain a list of - * devices currently connected to the system. This is known as device - * discovery. - * - * Just because you have a reference to a device does not mean it is - * necessarily usable. The device may have been unplugged, you may not have - * permission to operate such device, or another program or driver may be - * using the device. - * - * When you've found a device that you'd like to operate, you must ask - * src to open the device using the libusb_open() function. Assuming - * success, src then returns you a device handle - * (a \ref libusb_device_handle pointer). All "real" I/O operations then - * operate on the handle rather than the original device pointer. - * - * \section devref Device discovery and reference counting - * - * Device discovery (i.e. calling libusb_get_device_list()) returns a - * freshly-allocated list of devices. The list itself must be freed when - * you are done with it. src also needs to know when it is OK to free - * the contents of the list - the devices themselves. - * - * To handle these issues, src provides you with two separate items: - * - A function to free the list itself - * - A reference counting system for the devices inside - * - * New devices presented by the libusb_get_device_list() function all have a - * reference count of 1. You can increase and decrease reference count using - * libusb_ref_device() and libusb_unref_device(). A device is destroyed when - * its reference count reaches 0. - * - * With the above information in mind, the process of opening a device can - * be viewed as follows: - * -# Discover devices using libusb_get_device_list(). - * -# Choose the device that you want to operate, and call libusb_open(). - * -# Unref all devices in the discovered device list. - * -# Free the discovered device list. - * - * The order is important - you must not unreference the device before - * attempting to open it, because unreferencing it may destroy the device. - * - * For convenience, the libusb_free_device_list() function includes a - * parameter to optionally unreference all the devices in the list before - * freeing the list itself. This combines steps 3 and 4 above. - * - * As an implementation detail, libusb_open() actually adds a reference to - * the device in question. This is because the device remains available - * through the handle via libusb_get_device(). The reference is deleted during - * libusb_close(). - */ - -/** @defgroup libusb_misc Miscellaneous */ - -/* we traverse usbfs without knowing how many devices we are going to find. - * so we create this discovered_devs model which is similar to a linked-list - * which grows when required. it can be freed once discovery has completed, - * eliminating the need for a list node in the libusb_device structure - * itself. */ -#define DISCOVERED_DEVICES_SIZE_STEP 8 - -static struct discovered_devs *discovered_devs_alloc(void) -{ - struct discovered_devs *ret = - malloc(sizeof(*ret) + (sizeof(void *) * DISCOVERED_DEVICES_SIZE_STEP)); - - if (ret) { - ret->len = 0; - ret->capacity = DISCOVERED_DEVICES_SIZE_STEP; - } - return ret; -} - -static void discovered_devs_free(struct discovered_devs *discdevs) -{ - size_t i; - - for (i = 0; i < discdevs->len; i++) - libusb_unref_device(discdevs->devices[i]); - - free(discdevs); -} - -/* append a device to the discovered devices collection. may realloc itself, - * returning new discdevs. returns NULL on realloc failure. */ -struct discovered_devs *discovered_devs_append( - struct discovered_devs *discdevs, struct libusb_device *dev) -{ - size_t len = discdevs->len; - size_t capacity; - struct discovered_devs *new_discdevs; - - /* if there is space, just append the device */ - if (len < discdevs->capacity) { - discdevs->devices[len] = libusb_ref_device(dev); - discdevs->len++; - return discdevs; - } - - /* exceeded capacity, need to grow */ - usbi_dbg("need to increase capacity"); - capacity = discdevs->capacity + DISCOVERED_DEVICES_SIZE_STEP; - /* can't use usbi_reallocf here because in failure cases it would - * free the existing discdevs without unreferencing its devices. */ - new_discdevs = realloc(discdevs, - sizeof(*discdevs) + (sizeof(void *) * capacity)); - if (!new_discdevs) { - discovered_devs_free(discdevs); - return NULL; - } - - discdevs = new_discdevs; - discdevs->capacity = capacity; - discdevs->devices[len] = libusb_ref_device(dev); - discdevs->len++; - - return discdevs; -} - -/* Allocate a new device with a specific session ID. The returned device has - * a reference count of 1. */ -struct libusb_device *usbi_alloc_device(struct libusb_context *ctx, - unsigned long session_id) -{ - size_t priv_size = usbi_backend.device_priv_size; - struct libusb_device *dev = calloc(1, sizeof(*dev) + priv_size); - int r; - - if (!dev) - return NULL; - - r = usbi_mutex_init(&dev->lock); - if (r) { - free(dev); - return NULL; - } - - dev->ctx = ctx; - dev->refcnt = 1; - dev->session_data = session_id; - dev->speed = LIBUSB_SPEED_UNKNOWN; - - if (!libusb_has_capability(LIBUSB_CAP_HAS_HOTPLUG)) { - usbi_connect_device (dev); - } - - return dev; -} - -void usbi_connect_device(struct libusb_device *dev) -{ - struct libusb_context *ctx = DEVICE_CTX(dev); - - dev->attached = 1; - - usbi_mutex_lock(&dev->ctx->usb_devs_lock); - list_add(&dev->list, &dev->ctx->usb_devs); - usbi_mutex_unlock(&dev->ctx->usb_devs_lock); - - /* Signal that an event has occurred for this device if we support hotplug AND - * the hotplug message list is ready. This prevents an event from getting raised - * during initial enumeration. */ - if (libusb_has_capability(LIBUSB_CAP_HAS_HOTPLUG) && dev->ctx->hotplug_msgs.next) { - usbi_hotplug_notification(ctx, dev, LIBUSB_HOTPLUG_EVENT_DEVICE_ARRIVED); - } -} - -void usbi_disconnect_device(struct libusb_device *dev) -{ - struct libusb_context *ctx = DEVICE_CTX(dev); - - usbi_mutex_lock(&dev->lock); - dev->attached = 0; - usbi_mutex_unlock(&dev->lock); - - usbi_mutex_lock(&ctx->usb_devs_lock); - list_del(&dev->list); - usbi_mutex_unlock(&ctx->usb_devs_lock); - - /* Signal that an event has occurred for this device if we support hotplug AND - * the hotplug message list is ready. This prevents an event from getting raised - * during initial enumeration. libusb_handle_events will take care of dereferencing - * the device. */ - if (libusb_has_capability(LIBUSB_CAP_HAS_HOTPLUG) && dev->ctx->hotplug_msgs.next) { - usbi_hotplug_notification(ctx, dev, LIBUSB_HOTPLUG_EVENT_DEVICE_LEFT); - } -} - -/* Perform some final sanity checks on a newly discovered device. If this - * function fails (negative return code), the device should not be added - * to the discovered device list. */ -int usbi_sanitize_device(struct libusb_device *dev) -{ - int r; - uint8_t num_configurations; - - r = usbi_device_cache_descriptor(dev); - if (r < 0) - return r; - - num_configurations = dev->device_descriptor.bNumConfigurations; - if (num_configurations > USB_MAXCONFIG) { - usbi_err(DEVICE_CTX(dev), "too many configurations"); - return LIBUSB_ERROR_IO; - } else if (0 == num_configurations) - usbi_dbg("zero configurations, maybe an unauthorized device"); - - dev->num_configurations = num_configurations; - return 0; -} - -/* Examine src's internal list of known devices, looking for one with - * a specific session ID. Returns the matching device if it was found, and - * NULL otherwise. */ -struct libusb_device *usbi_get_device_by_session_id(struct libusb_context *ctx, - unsigned long session_id) -{ - struct libusb_device *dev; - struct libusb_device *ret = NULL; - - usbi_mutex_lock(&ctx->usb_devs_lock); - list_for_each_entry(dev, &ctx->usb_devs, list, struct libusb_device) - if (dev->session_data == session_id) { - ret = libusb_ref_device(dev); - break; - } - usbi_mutex_unlock(&ctx->usb_devs_lock); - - return ret; -} - -/** @ingroup libusb_dev - * Returns a list of USB devices currently attached to the system. This is - * your entry point into finding a USB device to operate. - * - * You are expected to unreference all the devices when you are done with - * them, and then free the list with libusb_free_device_list(). Note that - * libusb_free_device_list() can unref all the devices for you. Be careful - * not to unreference a device you are about to open until after you have - * opened it. - * - * This return value of this function indicates the number of devices in - * the resultant list. The list is actually one element larger, as it is - * NULL-terminated. - * - * \param ctx the context to operate on, or NULL for the default context - * \param list output location for a list of devices. Must be later freed with - * libusb_free_device_list(). - * \returns the number of devices in the outputted list, or any - * \ref libusb_error according to errors encountered by the backend. - */ -ssize_t API_EXPORTED libusb_get_device_list(libusb_context *ctx, - libusb_device ***list) -{ - struct discovered_devs *discdevs = discovered_devs_alloc(); - struct libusb_device **ret; - int r = 0; - ssize_t i, len; - USBI_GET_CONTEXT(ctx); - usbi_dbg(""); - - if (!discdevs) - return LIBUSB_ERROR_NO_MEM; - - if (libusb_has_capability(LIBUSB_CAP_HAS_HOTPLUG)) { - /* backend provides hotplug support */ - struct libusb_device *dev; - - if (usbi_backend.hotplug_poll) - usbi_backend.hotplug_poll(); - - usbi_mutex_lock(&ctx->usb_devs_lock); - list_for_each_entry(dev, &ctx->usb_devs, list, struct libusb_device) { - discdevs = discovered_devs_append(discdevs, dev); - - if (!discdevs) { - r = LIBUSB_ERROR_NO_MEM; - break; - } - } - usbi_mutex_unlock(&ctx->usb_devs_lock); - } else { - /* backend does not provide hotplug support */ - r = usbi_backend.get_device_list(ctx, &discdevs); - } - - if (r < 0) { - len = r; - goto out; - } - - /* convert discovered_devs into a list */ - len = (ssize_t)discdevs->len; - ret = calloc((size_t)len + 1, sizeof(struct libusb_device *)); - if (!ret) { - len = LIBUSB_ERROR_NO_MEM; - goto out; - } - - ret[len] = NULL; - for (i = 0; i < len; i++) { - struct libusb_device *dev = discdevs->devices[i]; - ret[i] = libusb_ref_device(dev); - } - *list = ret; - -out: - if (discdevs) - discovered_devs_free(discdevs); - return len; -} - -/** \ingroup libusb_dev - * Frees a list of devices previously discovered using - * libusb_get_device_list(). If the unref_devices parameter is set, the - * reference count of each device in the list is decremented by 1. - * \param list the list to free - * \param unref_devices whether to unref the devices in the list - */ -void API_EXPORTED libusb_free_device_list(libusb_device **list, - int unref_devices) -{ - if (!list) - return; - - if (unref_devices) { - int i = 0; - struct libusb_device *dev; - - while ((dev = list[i++]) != NULL) - libusb_unref_device(dev); - } - free(list); -} - -/** \ingroup libusb_dev - * Get the number of the bus that a device is connected to. - * \param dev a device - * \returns the bus number - */ -uint8_t API_EXPORTED libusb_get_bus_number(libusb_device *dev) -{ - return dev->bus_number; -} - -/** \ingroup libusb_dev - * Get the number of the port that a device is connected to. - * Unless the OS does something funky, or you are hot-plugging USB extension cards, - * the port number returned by this call is usually guaranteed to be uniquely tied - * to a physical port, meaning that different devices plugged on the same physical - * port should return the same port number. - * - * But outside of this, there is no guarantee that the port number returned by this - * call will remain the same, or even match the order in which ports have been - * numbered by the HUB/HCD manufacturer. - * - * \param dev a device - * \returns the port number (0 if not available) - */ -uint8_t API_EXPORTED libusb_get_port_number(libusb_device *dev) -{ - return dev->port_number; -} - -/** \ingroup libusb_dev - * Get the list of all port numbers from root for the specified device - * - * Since version 1.0.16, \ref LIBUSB_API_VERSION >= 0x01000102 - * \param dev a device - * \param port_numbers the array that should contain the port numbers - * \param port_numbers_len the maximum length of the array. As per the USB 3.0 - * specs, the current maximum limit for the depth is 7. - * \returns the number of elements filled - * \returns LIBUSB_ERROR_OVERFLOW if the array is too small - */ -int API_EXPORTED libusb_get_port_numbers(libusb_device *dev, - uint8_t* port_numbers, int port_numbers_len) -{ - int i = port_numbers_len; - struct libusb_context *ctx = DEVICE_CTX(dev); - - if (port_numbers_len <= 0) - return LIBUSB_ERROR_INVALID_PARAM; - - // HCDs can be listed as devices with port #0 - while((dev) && (dev->port_number != 0)) { - if (--i < 0) { - usbi_warn(ctx, "port numbers array is too small"); - return LIBUSB_ERROR_OVERFLOW; - } - port_numbers[i] = dev->port_number; - dev = dev->parent_dev; - } - if (i < port_numbers_len) - memmove(port_numbers, &port_numbers[i], port_numbers_len - i); - return port_numbers_len - i; -} - -/** \ingroup libusb_dev - * Deprecated please use libusb_get_port_numbers instead. - */ -int API_EXPORTED libusb_get_port_path(libusb_context *ctx, libusb_device *dev, - uint8_t* port_numbers, uint8_t port_numbers_len) -{ - UNUSED(ctx); - - return libusb_get_port_numbers(dev, port_numbers, port_numbers_len); -} - -/** \ingroup libusb_dev - * Get the the parent from the specified device. - * \param dev a device - * \returns the device parent or NULL if not available - * You should issue a \ref libusb_get_device_list() before calling this - * function and make sure that you only access the parent before issuing - * \ref libusb_free_device_list(). The reason is that src currently does - * not maintain a permanent list of device instances, and therefore can - * only guarantee that parents are fully instantiated within a - * libusb_get_device_list() - libusb_free_device_list() block. - */ -DEFAULT_VISIBILITY -libusb_device * LIBUSB_CALL libusb_get_parent(libusb_device *dev) -{ - return dev->parent_dev; -} - -/** \ingroup libusb_dev - * Get the address of the device on the bus it is connected to. - * \param dev a device - * \returns the device address - */ -uint8_t API_EXPORTED libusb_get_device_address(libusb_device *dev) -{ - return dev->device_address; -} - -/** \ingroup libusb_dev - * Get the negotiated connection speed for a device. - * \param dev a device - * \returns a \ref libusb_speed code, where LIBUSB_SPEED_UNKNOWN means that - * the OS doesn't know or doesn't support returning the negotiated speed. - */ -int API_EXPORTED libusb_get_device_speed(libusb_device *dev) -{ - return dev->speed; -} - -static const struct libusb_endpoint_descriptor *find_endpoint( - struct libusb_config_descriptor *config, unsigned char endpoint) -{ - int iface_idx; - for (iface_idx = 0; iface_idx < config->bNumInterfaces; iface_idx++) { - const struct libusb_interface *iface = &config->interface[iface_idx]; - int altsetting_idx; - - for (altsetting_idx = 0; altsetting_idx < iface->num_altsetting; - altsetting_idx++) { - const struct libusb_interface_descriptor *altsetting - = &iface->altsetting[altsetting_idx]; - int ep_idx; - - for (ep_idx = 0; ep_idx < altsetting->bNumEndpoints; ep_idx++) { - const struct libusb_endpoint_descriptor *ep = - &altsetting->endpoint[ep_idx]; - if (ep->bEndpointAddress == endpoint) - return ep; - } - } - } - return NULL; -} - -/** \ingroup libusb_dev - * Convenience function to retrieve the wMaxPacketSize value for a particular - * endpoint in the active device configuration. - * - * This function was originally intended to be of assistance when setting up - * isochronous transfers, but a design mistake resulted in this function - * instead. It simply returns the wMaxPacketSize value without considering - * its contents. If you're dealing with isochronous transfers, you probably - * want libusb_get_max_iso_packet_size() instead. - * - * \param dev a device - * \param endpoint address of the endpoint in question - * \returns the wMaxPacketSize value - * \returns LIBUSB_ERROR_NOT_FOUND if the endpoint does not exist - * \returns LIBUSB_ERROR_OTHER on other failure - */ -int API_EXPORTED libusb_get_max_packet_size(libusb_device *dev, - unsigned char endpoint) -{ - struct libusb_config_descriptor *config; - const struct libusb_endpoint_descriptor *ep; - int r; - - r = libusb_get_active_config_descriptor(dev, &config); - if (r < 0) { - usbi_err(DEVICE_CTX(dev), - "could not retrieve active config descriptor"); - return LIBUSB_ERROR_OTHER; - } - - ep = find_endpoint(config, endpoint); - if (!ep) { - r = LIBUSB_ERROR_NOT_FOUND; - goto out; - } - - r = ep->wMaxPacketSize; - -out: - libusb_free_config_descriptor(config); - return r; -} - -/** \ingroup libusb_dev - * Calculate the maximum packet size which a specific endpoint is capable is - * sending or receiving in the duration of 1 microframe - * - * Only the active configuration is examined. The calculation is based on the - * wMaxPacketSize field in the endpoint descriptor as described in section - * 9.6.6 in the USB 2.0 specifications. - * - * If acting on an isochronous or interrupt endpoint, this function will - * multiply the value found in bits 0:10 by the number of transactions per - * microframe (determined by bits 11:12). Otherwise, this function just - * returns the numeric value found in bits 0:10. For USB 3.0 device, it - * will attempts to retrieve the Endpoint Companion Descriptor to return - * wBytesPerInterval. - * - * This function is useful for setting up isochronous transfers, for example - * you might pass the return value from this function to - * libusb_set_iso_packet_lengths() in order to set the length field of every - * isochronous packet in a transfer. - * - * Since v1.0.3. - * - * \param dev a device - * \param endpoint address of the endpoint in question - * \returns the maximum packet size which can be sent/received on this endpoint - * \returns LIBUSB_ERROR_NOT_FOUND if the endpoint does not exist - * \returns LIBUSB_ERROR_OTHER on other failure - */ -int API_EXPORTED libusb_get_max_iso_packet_size(libusb_device *dev, - unsigned char endpoint) -{ - struct libusb_config_descriptor *config; - const struct libusb_endpoint_descriptor *ep; - struct libusb_ss_endpoint_companion_descriptor *ss_ep_cmp; - enum libusb_transfer_type ep_type; - uint16_t val; - int r; - int speed; - - r = libusb_get_active_config_descriptor(dev, &config); - if (r < 0) { - usbi_err(DEVICE_CTX(dev), - "could not retrieve active config descriptor"); - return LIBUSB_ERROR_OTHER; - } - - ep = find_endpoint(config, endpoint); - if (!ep) { - r = LIBUSB_ERROR_NOT_FOUND; - goto out; - } - - speed = libusb_get_device_speed( dev ); - if (speed == LIBUSB_SPEED_SUPER) { - r = libusb_get_ss_endpoint_companion_descriptor(dev->ctx, ep, &ss_ep_cmp); - if (r == LIBUSB_SUCCESS) { - r = ss_ep_cmp->wBytesPerInterval; - libusb_free_ss_endpoint_companion_descriptor(ss_ep_cmp); - } - } - - /* If the device isn't a SuperSpeed device or retrieving the SS endpoint didn't worked. */ - if (speed != LIBUSB_SPEED_SUPER || r < 0) { - val = ep->wMaxPacketSize; - ep_type = (enum libusb_transfer_type) (ep->bmAttributes & 0x3); - - r = val & 0x07ff; - if (ep_type == LIBUSB_TRANSFER_TYPE_ISOCHRONOUS - || ep_type == LIBUSB_TRANSFER_TYPE_INTERRUPT) - r *= (1 + ((val >> 11) & 3)); - } - -out: - libusb_free_config_descriptor(config); - return r; -} - -/** \ingroup libusb_dev - * Increment the reference count of a device. - * \param dev the device to reference - * \returns the same device - */ -DEFAULT_VISIBILITY -libusb_device * LIBUSB_CALL libusb_ref_device(libusb_device *dev) -{ - usbi_mutex_lock(&dev->lock); - dev->refcnt++; - usbi_mutex_unlock(&dev->lock); - return dev; -} - -/** \ingroup libusb_dev - * Decrement the reference count of a device. If the decrement operation - * causes the reference count to reach zero, the device shall be destroyed. - * \param dev the device to unreference - */ -void API_EXPORTED libusb_unref_device(libusb_device *dev) -{ - int refcnt; - - if (!dev) - return; - - usbi_mutex_lock(&dev->lock); - refcnt = --dev->refcnt; - usbi_mutex_unlock(&dev->lock); - - if (refcnt == 0) { - usbi_dbg("destroy device %d.%d", dev->bus_number, dev->device_address); - - libusb_unref_device(dev->parent_dev); - - if (usbi_backend.destroy_device) - usbi_backend.destroy_device(dev); - - if (!libusb_has_capability(LIBUSB_CAP_HAS_HOTPLUG)) { - /* backend does not support hotplug */ - usbi_disconnect_device(dev); - } - - usbi_mutex_destroy(&dev->lock); - free(dev); - } -} - -/* - * Signal the event pipe so that the event handling thread will be - * interrupted to process an internal event. - */ -int usbi_signal_event(struct libusb_context *ctx) -{ - unsigned char dummy = 1; - ssize_t r; - - /* write some data on event pipe to interrupt event handlers */ - r = usbi_write(ctx->event_pipe[1], &dummy, sizeof(dummy)); - if (r != sizeof(dummy)) { - usbi_warn(ctx, "internal signalling write failed"); - return LIBUSB_ERROR_IO; - } - - return 0; -} - -/* - * Clear the event pipe so that the event handling will no longer be - * interrupted. - */ -int usbi_clear_event(struct libusb_context *ctx) -{ - unsigned char dummy; - ssize_t r; - - /* read some data on event pipe to clear it */ - r = usbi_read(ctx->event_pipe[0], &dummy, sizeof(dummy)); - if (r != sizeof(dummy)) { - usbi_warn(ctx, "internal signalling read failed"); - return LIBUSB_ERROR_IO; - } - - return 0; -} - -/** \ingroup libusb_dev - * Wrap a platform-specific system device handle and obtain a src device - * handle for the underlying device. The handle allows you to use src to - * perform I/O on the device in question. - * - * On Linux, the system device handle must be a valid file descriptor opened - * on the device node. - * - * The system device handle must remain open until libusb_close() is called. - * The system device handle will not be closed by libusb_close(). - * - * Internally, this function creates a temporary device and makes it - * available to you through libusb_get_device(). This device is destroyed - * during libusb_close(). The device shall not be opened through libusb_open(). - * - * This is a non-blocking function; no requests are sent over the bus. - * - * \param ctx the context to operate on, or NULL for the default context - * \param sys_dev the platform-specific system device handle - * \param dev_handle output location for the returned device handle pointer. Only - * populated when the return code is 0. - * \returns 0 on success - * \returns LIBUSB_ERROR_NO_MEM on memory allocation failure - * \returns LIBUSB_ERROR_ACCESS if the user has insufficient permissions - * \returns LIBUSB_ERROR_NOT_SUPPORTED if the operation is not supported on this - * platform - * \returns another LIBUSB_ERROR code on other failure - */ -int API_EXPORTED libusb_wrap_sys_device(libusb_context *ctx, intptr_t sys_dev, - libusb_device_handle **dev_handle) -{ - struct libusb_device_handle *_dev_handle; - size_t priv_size = usbi_backend.device_handle_priv_size; - int r; - usbi_dbg("wrap_sys_device %p", (void *)sys_dev); - - USBI_GET_CONTEXT(ctx); - - if (!usbi_backend.wrap_sys_device) - return LIBUSB_ERROR_NOT_SUPPORTED; - - _dev_handle = malloc(sizeof(*_dev_handle) + priv_size); - if (!_dev_handle) - return LIBUSB_ERROR_NO_MEM; - - r = usbi_mutex_init(&_dev_handle->lock); - if (r) { - free(_dev_handle); - return LIBUSB_ERROR_OTHER; - } - - _dev_handle->dev = NULL; - _dev_handle->auto_detach_kernel_driver = 0; - _dev_handle->claimed_interfaces = 0; - memset(&_dev_handle->os_priv, 0, priv_size); - - r = usbi_backend.wrap_sys_device(ctx, _dev_handle, sys_dev); - if (r < 0) { - usbi_dbg("wrap_sys_device %p returns %d", (void *)sys_dev, r); - usbi_mutex_destroy(&_dev_handle->lock); - free(_dev_handle); - return r; - } - - usbi_mutex_lock(&ctx->open_devs_lock); - list_add(&_dev_handle->list, &ctx->open_devs); - usbi_mutex_unlock(&ctx->open_devs_lock); - *dev_handle = _dev_handle; - - return 0; -} - -/** \ingroup libusb_dev - * Open a device and obtain a device handle. A handle allows you to perform - * I/O on the device in question. - * - * Internally, this function adds a reference to the device and makes it - * available to you through libusb_get_device(). This reference is removed - * during libusb_close(). - * - * This is a non-blocking function; no requests are sent over the bus. - * - * \param dev the device to open - * \param dev_handle output location for the returned device handle pointer. Only - * populated when the return code is 0. - * \returns 0 on success - * \returns LIBUSB_ERROR_NO_MEM on memory allocation failure - * \returns LIBUSB_ERROR_ACCESS if the user has insufficient permissions - * \returns LIBUSB_ERROR_NO_DEVICE if the device has been disconnected - * \returns another LIBUSB_ERROR code on other failure - */ -int API_EXPORTED libusb_open(libusb_device *dev, - libusb_device_handle **dev_handle) -{ - struct libusb_context *ctx = DEVICE_CTX(dev); - struct libusb_device_handle *_dev_handle; - size_t priv_size = usbi_backend.device_handle_priv_size; - int r; - usbi_dbg("open %d.%d", dev->bus_number, dev->device_address); - - if (!dev->attached) { - return LIBUSB_ERROR_NO_DEVICE; - } - - _dev_handle = malloc(sizeof(*_dev_handle) + priv_size); - if (!_dev_handle) - return LIBUSB_ERROR_NO_MEM; - - r = usbi_mutex_init(&_dev_handle->lock); - if (r) { - free(_dev_handle); - return LIBUSB_ERROR_OTHER; - } - - _dev_handle->dev = libusb_ref_device(dev); - _dev_handle->auto_detach_kernel_driver = 0; - _dev_handle->claimed_interfaces = 0; - memset(&_dev_handle->os_priv, 0, priv_size); - - r = usbi_backend.open(_dev_handle); - if (r < 0) { - usbi_dbg("open %d.%d returns %d", dev->bus_number, dev->device_address, r); - libusb_unref_device(dev); - usbi_mutex_destroy(&_dev_handle->lock); - free(_dev_handle); - return r; - } - - usbi_mutex_lock(&ctx->open_devs_lock); - list_add(&_dev_handle->list, &ctx->open_devs); - usbi_mutex_unlock(&ctx->open_devs_lock); - *dev_handle = _dev_handle; - - return 0; -} - -/** \ingroup libusb_dev - * Convenience function for finding a device with a particular - * idVendor/idProduct combination. This function is intended - * for those scenarios where you are using src to knock up a quick test - * application - it allows you to avoid calling libusb_get_device_list() and - * worrying about traversing/freeing the list. - * - * This function has limitations and is hence not intended for use in real - * applications: if multiple devices have the same IDs it will only - * give you the first one, etc. - * - * \param ctx the context to operate on, or NULL for the default context - * \param vendor_id the idVendor value to search for - * \param product_id the idProduct value to search for - * \returns a device handle for the first found device, or NULL on error - * or if the device could not be found. */ -DEFAULT_VISIBILITY -libusb_device_handle * LIBUSB_CALL libusb_open_device_with_vid_pid( - libusb_context *ctx, uint16_t vendor_id, uint16_t product_id) -{ - struct libusb_device **devs; - struct libusb_device *found = NULL; - struct libusb_device *dev; - struct libusb_device_handle *dev_handle = NULL; - size_t i = 0; - int r; - - if (libusb_get_device_list(ctx, &devs) < 0) - return NULL; - - while ((dev = devs[i++]) != NULL) { - struct libusb_device_descriptor desc; - r = libusb_get_device_descriptor(dev, &desc); - if (r < 0) - goto out; - if (desc.idVendor == vendor_id && desc.idProduct == product_id) { - found = dev; - break; - } - } - - if (found) { - r = libusb_open(found, &dev_handle); - if (r < 0) - dev_handle = NULL; - } - -out: - libusb_free_device_list(devs, 1); - return dev_handle; -} - -static void do_close(struct libusb_context *ctx, - struct libusb_device_handle *dev_handle) -{ - struct usbi_transfer *itransfer; - struct usbi_transfer *tmp; - - /* remove any transfers in flight that are for this device */ - usbi_mutex_lock(&ctx->flying_transfers_lock); - - /* safe iteration because transfers may be being deleted */ - list_for_each_entry_safe(itransfer, tmp, &ctx->flying_transfers, list, struct usbi_transfer) { - struct libusb_transfer *transfer = - USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); - - if (transfer->dev_handle != dev_handle) - continue; - - usbi_mutex_lock(&itransfer->lock); - if (!(itransfer->state_flags & USBI_TRANSFER_DEVICE_DISAPPEARED)) { - usbi_err(ctx, "Device handle closed while transfer was still being processed, but the device is still connected as far as we know"); - - if (itransfer->state_flags & USBI_TRANSFER_CANCELLING) - usbi_warn(ctx, "A cancellation for an in-flight transfer hasn't completed but closing the device handle"); - else - usbi_err(ctx, "A cancellation hasn't even been scheduled on the transfer for which the device is closing"); - } - usbi_mutex_unlock(&itransfer->lock); - - /* remove from the list of in-flight transfers and make sure - * we don't accidentally use the device handle in the future - * (or that such accesses will be easily caught and identified as a crash) - */ - list_del(&itransfer->list); - transfer->dev_handle = NULL; - - /* it is up to the user to free up the actual transfer struct. this is - * just making sure that we don't attempt to process the transfer after - * the device handle is invalid - */ - usbi_dbg("Removed transfer %p from the in-flight list because device handle %p closed", - transfer, dev_handle); - } - usbi_mutex_unlock(&ctx->flying_transfers_lock); - - usbi_mutex_lock(&ctx->open_devs_lock); - list_del(&dev_handle->list); - usbi_mutex_unlock(&ctx->open_devs_lock); - - usbi_backend.close(dev_handle); - libusb_unref_device(dev_handle->dev); - usbi_mutex_destroy(&dev_handle->lock); - free(dev_handle); -} - -/** \ingroup libusb_dev - * Close a device handle. Should be called on all open handles before your - * application exits. - * - * Internally, this function destroys the reference that was added by - * libusb_open() on the given device. - * - * This is a non-blocking function; no requests are sent over the bus. - * - * \param dev_handle the device handle to close - */ -void API_EXPORTED libusb_close(libusb_device_handle *dev_handle) -{ - struct libusb_context *ctx; - int handling_events; - int pending_events; - - if (!dev_handle) - return; - usbi_dbg(""); - - ctx = HANDLE_CTX(dev_handle); - handling_events = usbi_handling_events(ctx); - - /* Similarly to libusb_open(), we want to interrupt all event handlers - * at this point. More importantly, we want to perform the actual close of - * the device while holding the event handling lock (preventing any other - * thread from doing event handling) because we will be removing a file - * descriptor from the polling loop. If this is being called by the current - * event handler, we can bypass the interruption code because we already - * hold the event handling lock. */ - - if (!handling_events) { - /* Record that we are closing a device. - * Only signal an event if there are no prior pending events. */ - usbi_mutex_lock(&ctx->event_data_lock); - pending_events = usbi_pending_events(ctx); - ctx->device_close++; - if (!pending_events) - usbi_signal_event(ctx); - usbi_mutex_unlock(&ctx->event_data_lock); - - /* take event handling lock */ - libusb_lock_events(ctx); - } - - /* Close the device */ - do_close(ctx, dev_handle); - - if (!handling_events) { - /* We're done with closing this device. - * Clear the event pipe if there are no further pending events. */ - usbi_mutex_lock(&ctx->event_data_lock); - ctx->device_close--; - pending_events = usbi_pending_events(ctx); - if (!pending_events) - usbi_clear_event(ctx); - usbi_mutex_unlock(&ctx->event_data_lock); - - /* Release event handling lock and wake up event waiters */ - libusb_unlock_events(ctx); - } -} - -/** \ingroup libusb_dev - * Get the underlying device for a device handle. This function does not modify - * the reference count of the returned device, so do not feel compelled to - * unreference it when you are done. - * \param dev_handle a device handle - * \returns the underlying device - */ -DEFAULT_VISIBILITY -libusb_device * LIBUSB_CALL libusb_get_device(libusb_device_handle *dev_handle) -{ - return dev_handle->dev; -} - -/** \ingroup libusb_dev - * Determine the bConfigurationValue of the currently active configuration. - * - * You could formulate your own control request to obtain this information, - * but this function has the advantage that it may be able to retrieve the - * information from operating system caches (no I/O involved). - * - * If the OS does not cache this information, then this function will block - * while a control transfer is submitted to retrieve the information. - * - * This function will return a value of 0 in the config output - * parameter if the device is in unconfigured state. - * - * \param dev_handle a device handle - * \param config output location for the bConfigurationValue of the active - * configuration (only valid for return code 0) - * \returns 0 on success - * \returns LIBUSB_ERROR_NO_DEVICE if the device has been disconnected - * \returns another LIBUSB_ERROR code on other failure - */ -int API_EXPORTED libusb_get_configuration(libusb_device_handle *dev_handle, - int *config) -{ - int r = LIBUSB_ERROR_NOT_SUPPORTED; - - usbi_dbg(""); - if (usbi_backend.get_configuration) - r = usbi_backend.get_configuration(dev_handle, config); - - if (r == LIBUSB_ERROR_NOT_SUPPORTED) { - uint8_t tmp = 0; - usbi_dbg("falling back to control message"); - r = libusb_control_transfer(dev_handle, LIBUSB_ENDPOINT_IN, - LIBUSB_REQUEST_GET_CONFIGURATION, 0, 0, &tmp, 1, 1000); - if (r == 0) { - usbi_err(HANDLE_CTX(dev_handle), "zero bytes returned in ctrl transfer?"); - r = LIBUSB_ERROR_IO; - } else if (r == 1) { - r = 0; - *config = tmp; - } else { - usbi_dbg("control failed, error %d", r); - } - } - - if (r == 0) - usbi_dbg("active config %d", *config); - - return r; -} - -/** \ingroup libusb_dev - * Set the active configuration for a device. - * - * The operating system may or may not have already set an active - * configuration on the device. It is up to your application to ensure the - * correct configuration is selected before you attempt to claim interfaces - * and perform other operations. - * - * If you call this function on a device already configured with the selected - * configuration, then this function will act as a lightweight device reset: - * it will issue a SET_CONFIGURATION request using the current configuration, - * causing most USB-related device state to be reset (altsetting reset to zero, - * endpoint halts cleared, toggles reset). - * - * You cannot change/reset configuration if your application has claimed - * interfaces. It is advised to set the desired configuration before claiming - * interfaces. - * - * Alternatively you can call libusb_release_interface() first. Note if you - * do things this way you must ensure that auto_detach_kernel_driver for - * dev is 0, otherwise the kernel driver will be re-attached when you - * release the interface(s). - * - * You cannot change/reset configuration if other applications or drivers have - * claimed interfaces. - * - * A configuration value of -1 will put the device in unconfigured state. - * The USB specifications state that a configuration value of 0 does this, - * however buggy devices exist which actually have a configuration 0. - * - * You should always use this function rather than formulating your own - * SET_CONFIGURATION control request. This is because the underlying operating - * system needs to know when such changes happen. - * - * This is a blocking function. - * - * \param dev_handle a device handle - * \param configuration the bConfigurationValue of the configuration you - * wish to activate, or -1 if you wish to put the device in an unconfigured - * state - * \returns 0 on success - * \returns LIBUSB_ERROR_NOT_FOUND if the requested configuration does not exist - * \returns LIBUSB_ERROR_BUSY if interfaces are currently claimed - * \returns LIBUSB_ERROR_NO_DEVICE if the device has been disconnected - * \returns another LIBUSB_ERROR code on other failure - * \see libusb_set_auto_detach_kernel_driver() - */ -int API_EXPORTED libusb_set_configuration(libusb_device_handle *dev_handle, - int configuration) -{ - usbi_dbg("configuration %d", configuration); - return usbi_backend.set_configuration(dev_handle, configuration); -} - -/** \ingroup libusb_dev - * Claim an interface on a given device handle. You must claim the interface - * you wish to use before you can perform I/O on any of its endpoints. - * - * It is legal to attempt to claim an already-claimed interface, in which - * case src just returns 0 without doing anything. - * - * If auto_detach_kernel_driver is set to 1 for dev, the kernel driver - * will be detached if necessary, on failure the detach error is returned. - * - * Claiming of interfaces is a purely logical operation; it does not cause - * any requests to be sent over the bus. Interface claiming is used to - * instruct the underlying operating system that your application wishes - * to take ownership of the interface. - * - * This is a non-blocking function. - * - * \param dev_handle a device handle - * \param interface_number the bInterfaceNumber of the interface you - * wish to claim - * \returns 0 on success - * \returns LIBUSB_ERROR_NOT_FOUND if the requested interface does not exist - * \returns LIBUSB_ERROR_BUSY if another program or driver has claimed the - * interface - * \returns LIBUSB_ERROR_NO_DEVICE if the device has been disconnected - * \returns a LIBUSB_ERROR code on other failure - * \see libusb_set_auto_detach_kernel_driver() - */ -int API_EXPORTED libusb_claim_interface(libusb_device_handle *dev_handle, - int interface_number) -{ - int r = 0; - - usbi_dbg("interface %d", interface_number); - if (interface_number >= USB_MAXINTERFACES) - return LIBUSB_ERROR_INVALID_PARAM; - - if (!dev_handle->dev->attached) - return LIBUSB_ERROR_NO_DEVICE; - - usbi_mutex_lock(&dev_handle->lock); - if (dev_handle->claimed_interfaces & (1U << interface_number)) - goto out; - - r = usbi_backend.claim_interface(dev_handle, interface_number); - if (r == 0) - dev_handle->claimed_interfaces |= 1U << interface_number; - -out: - usbi_mutex_unlock(&dev_handle->lock); - return r; -} - -/** \ingroup libusb_dev - * Release an interface previously claimed with libusb_claim_interface(). You - * should release all claimed interfaces before closing a device handle. - * - * This is a blocking function. A SET_INTERFACE control request will be sent - * to the device, resetting interface state to the first alternate setting. - * - * If auto_detach_kernel_driver is set to 1 for dev, the kernel - * driver will be re-attached after releasing the interface. - * - * \param dev_handle a device handle - * \param interface_number the bInterfaceNumber of the - * previously-claimed interface - * \returns 0 on success - * \returns LIBUSB_ERROR_NOT_FOUND if the interface was not claimed - * \returns LIBUSB_ERROR_NO_DEVICE if the device has been disconnected - * \returns another LIBUSB_ERROR code on other failure - * \see libusb_set_auto_detach_kernel_driver() - */ -int API_EXPORTED libusb_release_interface(libusb_device_handle *dev_handle, - int interface_number) -{ - int r; - - usbi_dbg("interface %d", interface_number); - if (interface_number >= USB_MAXINTERFACES) - return LIBUSB_ERROR_INVALID_PARAM; - - usbi_mutex_lock(&dev_handle->lock); - if (!(dev_handle->claimed_interfaces & (1U << interface_number))) { - r = LIBUSB_ERROR_NOT_FOUND; - goto out; - } - - r = usbi_backend.release_interface(dev_handle, interface_number); - if (r == 0) - dev_handle->claimed_interfaces &= ~(1U << interface_number); - -out: - usbi_mutex_unlock(&dev_handle->lock); - return r; -} - -/** \ingroup libusb_dev - * Activate an alternate setting for an interface. The interface must have - * been previously claimed with libusb_claim_interface(). - * - * You should always use this function rather than formulating your own - * SET_INTERFACE control request. This is because the underlying operating - * system needs to know when such changes happen. - * - * This is a blocking function. - * - * \param dev_handle a device handle - * \param interface_number the bInterfaceNumber of the - * previously-claimed interface - * \param alternate_setting the bAlternateSetting of the alternate - * setting to activate - * \returns 0 on success - * \returns LIBUSB_ERROR_NOT_FOUND if the interface was not claimed, or the - * requested alternate setting does not exist - * \returns LIBUSB_ERROR_NO_DEVICE if the device has been disconnected - * \returns another LIBUSB_ERROR code on other failure - */ -int API_EXPORTED libusb_set_interface_alt_setting(libusb_device_handle *dev_handle, - int interface_number, int alternate_setting) -{ - usbi_dbg("interface %d altsetting %d", - interface_number, alternate_setting); - if (interface_number >= USB_MAXINTERFACES) - return LIBUSB_ERROR_INVALID_PARAM; - - usbi_mutex_lock(&dev_handle->lock); - if (!dev_handle->dev->attached) { - usbi_mutex_unlock(&dev_handle->lock); - return LIBUSB_ERROR_NO_DEVICE; - } - - if (!(dev_handle->claimed_interfaces & (1U << interface_number))) { - usbi_mutex_unlock(&dev_handle->lock); - return LIBUSB_ERROR_NOT_FOUND; - } - usbi_mutex_unlock(&dev_handle->lock); - - return usbi_backend.set_interface_altsetting(dev_handle, interface_number, - alternate_setting); -} - -/** \ingroup libusb_dev - * Clear the halt/stall condition for an endpoint. Endpoints with halt status - * are unable to receive or transmit data until the halt condition is stalled. - * - * You should cancel all pending transfers before attempting to clear the halt - * condition. - * - * This is a blocking function. - * - * \param dev_handle a device handle - * \param endpoint the endpoint to clear halt status - * \returns 0 on success - * \returns LIBUSB_ERROR_NOT_FOUND if the endpoint does not exist - * \returns LIBUSB_ERROR_NO_DEVICE if the device has been disconnected - * \returns another LIBUSB_ERROR code on other failure - */ -int API_EXPORTED libusb_clear_halt(libusb_device_handle *dev_handle, - unsigned char endpoint) -{ - usbi_dbg("endpoint %x", endpoint); - if (!dev_handle->dev->attached) - return LIBUSB_ERROR_NO_DEVICE; - - return usbi_backend.clear_halt(dev_handle, endpoint); -} - -/** \ingroup libusb_dev - * Perform a USB port reset to reinitialize a device. The system will attempt - * to restore the previous configuration and alternate settings after the - * reset has completed. - * - * If the reset fails, the descriptors change, or the previous state cannot be - * restored, the device will appear to be disconnected and reconnected. This - * means that the device handle is no longer valid (you should close it) and - * rediscover the device. A return code of LIBUSB_ERROR_NOT_FOUND indicates - * when this is the case. - * - * This is a blocking function which usually incurs a noticeable delay. - * - * \param dev_handle a handle of the device to reset - * \returns 0 on success - * \returns LIBUSB_ERROR_NOT_FOUND if re-enumeration is required, or if the - * device has been disconnected - * \returns another LIBUSB_ERROR code on other failure - */ -int API_EXPORTED libusb_reset_device(libusb_device_handle *dev_handle) -{ - usbi_dbg(""); - if (!dev_handle->dev->attached) - return LIBUSB_ERROR_NO_DEVICE; - - return usbi_backend.reset_device(dev_handle); -} - -/** \ingroup libusb_asyncio - * Allocate up to num_streams usb bulk streams on the specified endpoints. This - * function takes an array of endpoints rather then a single endpoint because - * some protocols require that endpoints are setup with similar stream ids. - * All endpoints passed in must belong to the same interface. - * - * Note this function may return less streams then requested. Also note that the - * same number of streams are allocated for each endpoint in the endpoint array. - * - * Stream id 0 is reserved, and should not be used to communicate with devices. - * If libusb_alloc_streams() returns with a value of N, you may use stream ids - * 1 to N. - * - * Since version 1.0.19, \ref LIBUSB_API_VERSION >= 0x01000103 - * - * \param dev_handle a device handle - * \param num_streams number of streams to try to allocate - * \param endpoints array of endpoints to allocate streams on - * \param num_endpoints length of the endpoints array - * \returns number of streams allocated, or a LIBUSB_ERROR code on failure - */ -int API_EXPORTED libusb_alloc_streams(libusb_device_handle *dev_handle, - uint32_t num_streams, unsigned char *endpoints, int num_endpoints) -{ - usbi_dbg("streams %u eps %d", (unsigned) num_streams, num_endpoints); - - if (!dev_handle->dev->attached) - return LIBUSB_ERROR_NO_DEVICE; - - if (usbi_backend.alloc_streams) - return usbi_backend.alloc_streams(dev_handle, num_streams, endpoints, - num_endpoints); - else - return LIBUSB_ERROR_NOT_SUPPORTED; -} - -/** \ingroup libusb_asyncio - * Free usb bulk streams allocated with libusb_alloc_streams(). - * - * Note streams are automatically free-ed when releasing an interface. - * - * Since version 1.0.19, \ref LIBUSB_API_VERSION >= 0x01000103 - * - * \param dev_handle a device handle - * \param endpoints array of endpoints to free streams on - * \param num_endpoints length of the endpoints array - * \returns LIBUSB_SUCCESS, or a LIBUSB_ERROR code on failure - */ -int API_EXPORTED libusb_free_streams(libusb_device_handle *dev_handle, - unsigned char *endpoints, int num_endpoints) -{ - usbi_dbg("eps %d", num_endpoints); - - if (!dev_handle->dev->attached) - return LIBUSB_ERROR_NO_DEVICE; - - if (usbi_backend.free_streams) - return usbi_backend.free_streams(dev_handle, endpoints, - num_endpoints); - else - return LIBUSB_ERROR_NOT_SUPPORTED; -} - -/** \ingroup libusb_asyncio - * Attempts to allocate a block of persistent DMA memory suitable for transfers - * against the given device. If successful, will return a block of memory - * that is suitable for use as "buffer" in \ref libusb_transfer against this - * device. Using this memory instead of regular memory means that the host - * controller can use DMA directly into the buffer to increase performance, and - * also that transfers can no longer fail due to kernel memory fragmentation. - * - * Note that this means you should not modify this memory (or even data on - * the same cache lines) when a transfer is in progress, although it is legal - * to have several transfers going on within the same memory block. - * - * Will return NULL on failure. Many systems do not support such zerocopy - * and will always return NULL. Memory allocated with this function must be - * freed with \ref libusb_dev_mem_free. Specifically, this means that the - * flag \ref LIBUSB_TRANSFER_FREE_BUFFER cannot be used to free memory allocated - * with this function. - * - * Since version 1.0.21, \ref LIBUSB_API_VERSION >= 0x01000105 - * - * \param dev_handle a device handle - * \param length size of desired data buffer - * \returns a pointer to the newly allocated memory, or NULL on failure - */ -DEFAULT_VISIBILITY -unsigned char * LIBUSB_CALL libusb_dev_mem_alloc(libusb_device_handle *dev_handle, - size_t length) -{ - if (!dev_handle->dev->attached) - return NULL; - - if (usbi_backend.dev_mem_alloc) - return usbi_backend.dev_mem_alloc(dev_handle, length); - else - return NULL; -} - -/** \ingroup libusb_asyncio - * Free device memory allocated with libusb_dev_mem_alloc(). - * - * \param dev_handle a device handle - * \param buffer pointer to the previously allocated memory - * \param length size of previously allocated memory - * \returns LIBUSB_SUCCESS, or a LIBUSB_ERROR code on failure - */ -int API_EXPORTED libusb_dev_mem_free(libusb_device_handle *dev_handle, - unsigned char *buffer, size_t length) -{ - if (usbi_backend.dev_mem_free) - return usbi_backend.dev_mem_free(dev_handle, buffer, length); - else - return LIBUSB_ERROR_NOT_SUPPORTED; -} - -/** \ingroup libusb_dev - * Determine if a kernel driver is active on an interface. If a kernel driver - * is active, you cannot claim the interface, and src will be unable to - * perform I/O. - * - * This functionality is not available on Windows. - * - * \param dev_handle a device handle - * \param interface_number the interface to check - * \returns 0 if no kernel driver is active - * \returns 1 if a kernel driver is active - * \returns LIBUSB_ERROR_NO_DEVICE if the device has been disconnected - * \returns LIBUSB_ERROR_NOT_SUPPORTED on platforms where the functionality - * is not available - * \returns another LIBUSB_ERROR code on other failure - * \see libusb_detach_kernel_driver() - */ -int API_EXPORTED libusb_kernel_driver_active(libusb_device_handle *dev_handle, - int interface_number) -{ - usbi_dbg("interface %d", interface_number); - - if (!dev_handle->dev->attached) - return LIBUSB_ERROR_NO_DEVICE; - - if (usbi_backend.kernel_driver_active) - return usbi_backend.kernel_driver_active(dev_handle, interface_number); - else - return LIBUSB_ERROR_NOT_SUPPORTED; -} - -/** \ingroup libusb_dev - * Detach a kernel driver from an interface. If successful, you will then be - * able to claim the interface and perform I/O. - * - * This functionality is not available on Darwin or Windows. - * - * Note that src itself also talks to the device through a special kernel - * driver, if this driver is already attached to the device, this call will - * not detach it and return LIBUSB_ERROR_NOT_FOUND. - * - * \param dev_handle a device handle - * \param interface_number the interface to detach the driver from - * \returns 0 on success - * \returns LIBUSB_ERROR_NOT_FOUND if no kernel driver was active - * \returns LIBUSB_ERROR_INVALID_PARAM if the interface does not exist - * \returns LIBUSB_ERROR_NO_DEVICE if the device has been disconnected - * \returns LIBUSB_ERROR_NOT_SUPPORTED on platforms where the functionality - * is not available - * \returns another LIBUSB_ERROR code on other failure - * \see libusb_kernel_driver_active() - */ -int API_EXPORTED libusb_detach_kernel_driver(libusb_device_handle *dev_handle, - int interface_number) -{ - usbi_dbg("interface %d", interface_number); - - if (!dev_handle->dev->attached) - return LIBUSB_ERROR_NO_DEVICE; - - if (usbi_backend.detach_kernel_driver) - return usbi_backend.detach_kernel_driver(dev_handle, interface_number); - else - return LIBUSB_ERROR_NOT_SUPPORTED; -} - -/** \ingroup libusb_dev - * Re-attach an interface's kernel driver, which was previously detached - * using libusb_detach_kernel_driver(). This call is only effective on - * Linux and returns LIBUSB_ERROR_NOT_SUPPORTED on all other platforms. - * - * This functionality is not available on Darwin or Windows. - * - * \param dev_handle a device handle - * \param interface_number the interface to attach the driver from - * \returns 0 on success - * \returns LIBUSB_ERROR_NOT_FOUND if no kernel driver was active - * \returns LIBUSB_ERROR_INVALID_PARAM if the interface does not exist - * \returns LIBUSB_ERROR_NO_DEVICE if the device has been disconnected - * \returns LIBUSB_ERROR_NOT_SUPPORTED on platforms where the functionality - * is not available - * \returns LIBUSB_ERROR_BUSY if the driver cannot be attached because the - * interface is claimed by a program or driver - * \returns another LIBUSB_ERROR code on other failure - * \see libusb_kernel_driver_active() - */ -int API_EXPORTED libusb_attach_kernel_driver(libusb_device_handle *dev_handle, - int interface_number) -{ - usbi_dbg("interface %d", interface_number); - - if (!dev_handle->dev->attached) - return LIBUSB_ERROR_NO_DEVICE; - - if (usbi_backend.attach_kernel_driver) - return usbi_backend.attach_kernel_driver(dev_handle, interface_number); - else - return LIBUSB_ERROR_NOT_SUPPORTED; -} - -/** \ingroup libusb_dev - * Enable/disable src's automatic kernel driver detachment. When this is - * enabled src will automatically detach the kernel driver on an interface - * when claiming the interface, and attach it when releasing the interface. - * - * Automatic kernel driver detachment is disabled on newly opened device - * handles by default. - * - * On platforms which do not have LIBUSB_CAP_SUPPORTS_DETACH_KERNEL_DRIVER - * this function will return LIBUSB_ERROR_NOT_SUPPORTED, and src will - * continue as if this function was never called. - * - * \param dev_handle a device handle - * \param enable whether to enable or disable auto kernel driver detachment - * - * \returns LIBUSB_SUCCESS on success - * \returns LIBUSB_ERROR_NOT_SUPPORTED on platforms where the functionality - * is not available - * \see libusb_claim_interface() - * \see libusb_release_interface() - * \see libusb_set_configuration() - */ -int API_EXPORTED libusb_set_auto_detach_kernel_driver( - libusb_device_handle *dev_handle, int enable) -{ - if (!(usbi_backend.caps & USBI_CAP_SUPPORTS_DETACH_KERNEL_DRIVER)) - return LIBUSB_ERROR_NOT_SUPPORTED; - - dev_handle->auto_detach_kernel_driver = enable; - return LIBUSB_SUCCESS; -} - -/** \ingroup libusb_lib - * \deprecated Use libusb_set_option() instead using the - * \ref LIBUSB_OPTION_LOG_LEVEL option. - */ -void API_EXPORTED libusb_set_debug(libusb_context *ctx, int level) -{ -#if defined(ENABLE_LOGGING) && !defined(ENABLE_DEBUG_LOGGING) - USBI_GET_CONTEXT(ctx); - if (!ctx->debug_fixed) { - level = CLAMP(level, LIBUSB_LOG_LEVEL_NONE, LIBUSB_LOG_LEVEL_DEBUG); - ctx->debug = (enum libusb_log_level)level; - } -#else - UNUSED(ctx); - UNUSED(level); -#endif -} - -/** \ingroup libusb_lib - * Set log handler. - * - * src will redirect its log messages to the provided callback function. - * src supports redirection of per context and global log messages. - * Log messages sent to the context will be sent to the global log handler too. - * - * If src is compiled without message logging or USE_SYSTEM_LOGGING_FACILITY - * is defined then global callback function will never be called. - * If ENABLE_DEBUG_LOGGING is defined then per context callback function will - * never be called. - * - * \param ctx context on which to assign log handler, or NULL for the default - * context. Parameter ignored if only LIBUSB_LOG_CB_GLOBAL mode is requested. - * \param cb pointer to the callback function, or NULL to stop log - * messages redirection - * \param mode mode of callback function operation. Several modes can be - * selected for a single callback function, see \ref libusb_log_cb_mode for - * a description. - * \see libusb_log_cb, libusb_log_cb_mode - */ -void API_EXPORTED libusb_set_log_cb(libusb_context *ctx, libusb_log_cb cb, - int mode) -{ -#if !defined(USE_SYSTEM_LOGGING_FACILITY) - if (mode & LIBUSB_LOG_CB_GLOBAL) { - log_handler = cb; - } -#endif -#if defined(ENABLE_LOGGING) && !defined(ENABLE_DEBUG_LOGGING) - if (mode & LIBUSB_LOG_CB_CONTEXT) { - USBI_GET_CONTEXT(ctx); - ctx->log_handler = cb; - } -#else - UNUSED(ctx); -#if defined(USE_SYSTEM_LOGGING_FACILITY) - UNUSED(cb); - UNUSED(mode); -#endif -#endif -} - -/** \ingroup libusb_lib - * Set an option in the library. - * - * Use this function to configure a specific option within the library. - * - * Some options require one or more arguments to be provided. Consult each - * option's documentation for specific requirements. - * - * Since version 1.0.22, \ref LIBUSB_API_VERSION >= 0x01000106 - * - * \param ctx context on which to operate - * \param option which option to set - * \param ... any required arguments for the specified option - * - * \returns LIBUSB_SUCCESS on success - * \returns LIBUSB_ERROR_INVALID_PARAM if the option or arguments are invalid - * \returns LIBUSB_ERROR_NOT_SUPPORTED if the option is valid but not supported - * on this platform - */ -int API_EXPORTED libusb_set_option(libusb_context *ctx, - enum libusb_option option, ...) -{ - int arg, r = LIBUSB_SUCCESS; - va_list ap; - - USBI_GET_CONTEXT(ctx); - - va_start(ap, option); - switch (option) { - case LIBUSB_OPTION_LOG_LEVEL: - arg = va_arg(ap, int); - if (arg < LIBUSB_LOG_LEVEL_NONE || arg > LIBUSB_LOG_LEVEL_DEBUG) { - r = LIBUSB_ERROR_INVALID_PARAM; - break; - } -#if defined(ENABLE_LOGGING) && !defined(ENABLE_DEBUG_LOGGING) - if (!ctx->debug_fixed) - ctx->debug = (enum libusb_log_level)arg; -#endif - break; - - /* Handle all backend-specific options here */ - case LIBUSB_OPTION_USE_USBDK: - if (usbi_backend.set_option) - r = usbi_backend.set_option(ctx, option, ap); - else - r = LIBUSB_ERROR_NOT_SUPPORTED; - break; - - default: - r = LIBUSB_ERROR_INVALID_PARAM; - } - va_end(ap); - - return r; -} - -#if defined(ENABLE_LOGGING) && !defined(ENABLE_DEBUG_LOGGING) -/* returns the log level as defined in the LIBUSB_DEBUG environment variable. - * if LIBUSB_DEBUG is not present or not a number, returns LIBUSB_LOG_LEVEL_NONE. - * value is clamped to ensure it is within the valid range of possibilities. - */ -static enum libusb_log_level get_env_debug_level(void) -{ - const char *dbg = getenv("LIBUSB_DEBUG"); - enum libusb_log_level level; - if (dbg) { - int dbg_level = atoi(dbg); - dbg_level = CLAMP(dbg_level, LIBUSB_LOG_LEVEL_NONE, LIBUSB_LOG_LEVEL_DEBUG); - level = (enum libusb_log_level)dbg_level; - } else { - level = LIBUSB_LOG_LEVEL_NONE; - } - return level; -} -#endif - -/** \ingroup libusb_lib - * Initialize src. This function must be called before calling any other - * src function. - * - * If you do not provide an output location for a context pointer, a default - * context will be created. If there was already a default context, it will - * be reused (and nothing will be initialized/reinitialized). - * - * \param context Optional output location for context pointer. - * Only valid on return code 0. - * \returns 0 on success, or a LIBUSB_ERROR code on failure - * \see libusb_contexts - */ -int API_EXPORTED libusb_init(libusb_context **context) -{ - struct libusb_device *dev, *next; - size_t priv_size = usbi_backend.context_priv_size; - struct libusb_context *ctx; - static int first_init = 1; - int r = 0; - - usbi_mutex_static_lock(&default_context_lock); - - if (!timestamp_origin.tv_sec) { - usbi_backend.clock_gettime(USBI_CLOCK_REALTIME, ×tamp_origin); - } - - if (!context && usbi_default_context) { - usbi_dbg("reusing default context"); - default_context_refcnt++; - usbi_mutex_static_unlock(&default_context_lock); - return 0; - } - - ctx = calloc(1, sizeof(*ctx) + priv_size); - if (!ctx) { - r = LIBUSB_ERROR_NO_MEM; - goto err_unlock; - } - -#if defined(ENABLE_LOGGING) && !defined(ENABLE_DEBUG_LOGGING) - ctx->debug = get_env_debug_level(); - if (ctx->debug != LIBUSB_LOG_LEVEL_NONE) - ctx->debug_fixed = 1; -#endif - - /* default context should be initialized before calling usbi_dbg */ - if (!usbi_default_context) { - usbi_default_context = ctx; - default_context_refcnt++; - usbi_dbg("created default context"); - } - - usbi_dbg("src v%u.%u.%u.%u%s", libusb_version_internal.major, libusb_version_internal.minor, - libusb_version_internal.micro, libusb_version_internal.nano, libusb_version_internal.rc); - - usbi_mutex_init(&ctx->usb_devs_lock); - usbi_mutex_init(&ctx->open_devs_lock); - usbi_mutex_init(&ctx->hotplug_cbs_lock); - list_init(&ctx->usb_devs); - list_init(&ctx->open_devs); - list_init(&ctx->hotplug_cbs); - ctx->next_hotplug_cb_handle = 1; - - usbi_mutex_static_lock(&active_contexts_lock); - if (first_init) { - first_init = 0; - list_init (&active_contexts_list); - } - list_add (&ctx->list, &active_contexts_list); - usbi_mutex_static_unlock(&active_contexts_lock); - - if (usbi_backend.init) { - r = usbi_backend.init(ctx); - if (r) - goto err_free_ctx; - } - - r = usbi_io_init(ctx); - if (r < 0) - goto err_backend_exit; - - usbi_mutex_static_unlock(&default_context_lock); - - if (context) - *context = ctx; - - return 0; - -err_backend_exit: - if (usbi_backend.exit) - usbi_backend.exit(ctx); -err_free_ctx: - if (ctx == usbi_default_context) { - usbi_default_context = NULL; - default_context_refcnt--; - } - - usbi_mutex_static_lock(&active_contexts_lock); - list_del (&ctx->list); - usbi_mutex_static_unlock(&active_contexts_lock); - - usbi_mutex_lock(&ctx->usb_devs_lock); - list_for_each_entry_safe(dev, next, &ctx->usb_devs, list, struct libusb_device) { - list_del(&dev->list); - libusb_unref_device(dev); - } - usbi_mutex_unlock(&ctx->usb_devs_lock); - - usbi_mutex_destroy(&ctx->open_devs_lock); - usbi_mutex_destroy(&ctx->usb_devs_lock); - usbi_mutex_destroy(&ctx->hotplug_cbs_lock); - - free(ctx); -err_unlock: - usbi_mutex_static_unlock(&default_context_lock); - return r; -} - -/** \ingroup libusb_lib - * Deinitialize src. Should be called after closing all open devices and - * before your application terminates. - * \param ctx the context to deinitialize, or NULL for the default context - */ -void API_EXPORTED libusb_exit(struct libusb_context *ctx) -{ - struct libusb_device *dev, *next; - struct timeval tv = { 0, 0 }; - int destroying_default_context = 0; - - usbi_dbg(""); - USBI_GET_CONTEXT(ctx); - - /* if working with default context, only actually do the deinitialization - * if we're the last user */ - usbi_mutex_static_lock(&default_context_lock); - if (ctx == usbi_default_context) { - if (--default_context_refcnt > 0) { - usbi_dbg("not destroying default context"); - usbi_mutex_static_unlock(&default_context_lock); - return; - } - usbi_dbg("destroying default context"); - - /* - * Setting this flag without unlocking the default context, as - * we are actually destroying the default context. - * usbi_default_context is not set to NULL yet, as all activities - * would only stop after usbi_backend->exit() returns. - */ - destroying_default_context = 1; - } else { - // Unlock default context, as we're not modifying it. - usbi_mutex_static_unlock(&default_context_lock); - } - - usbi_mutex_static_lock(&active_contexts_lock); - list_del (&ctx->list); - usbi_mutex_static_unlock(&active_contexts_lock); - - if (libusb_has_capability(LIBUSB_CAP_HAS_HOTPLUG)) { - usbi_hotplug_deregister(ctx, 1); - - /* - * Ensure any pending unplug events are read from the hotplug - * pipe. The usb_device-s hold in the events are no longer part - * of usb_devs, but the events still hold a reference! - * - * Note we don't do this if the application has left devices - * open (which implies a buggy app) to avoid packet completion - * handlers running when the app does not expect them to run. - */ - if (list_empty(&ctx->open_devs)) - libusb_handle_events_timeout(ctx, &tv); - - usbi_mutex_lock(&ctx->usb_devs_lock); - list_for_each_entry_safe(dev, next, &ctx->usb_devs, list, struct libusb_device) { - list_del(&dev->list); - libusb_unref_device(dev); - } - usbi_mutex_unlock(&ctx->usb_devs_lock); - } - - /* a few sanity checks. don't bother with locking because unless - * there is an application bug, nobody will be accessing these. */ - if (!list_empty(&ctx->usb_devs)) - usbi_warn(ctx, "some libusb_devices were leaked"); - if (!list_empty(&ctx->open_devs)) - usbi_warn(ctx, "application left some devices open"); - - usbi_io_exit(ctx); - if (usbi_backend.exit) - usbi_backend.exit(ctx); - - usbi_mutex_destroy(&ctx->open_devs_lock); - usbi_mutex_destroy(&ctx->usb_devs_lock); - usbi_mutex_destroy(&ctx->hotplug_cbs_lock); - free(ctx); - - if (destroying_default_context) { - usbi_default_context = NULL; - usbi_mutex_static_unlock(&default_context_lock); - } -} - -/** \ingroup libusb_misc - * Check at runtime if the loaded library has a given capability. - * This call should be performed after \ref libusb_init(), to ensure the - * backend has updated its capability set. - * - * \param capability the \ref libusb_capability to check for - * \returns nonzero if the running library has the capability, 0 otherwise - */ -int API_EXPORTED libusb_has_capability(uint32_t capability) -{ - switch (capability) { - case LIBUSB_CAP_HAS_CAPABILITY: - return 1; - case LIBUSB_CAP_HAS_HOTPLUG: - return !(usbi_backend.get_device_list); - case LIBUSB_CAP_HAS_HID_ACCESS: - return (usbi_backend.caps & USBI_CAP_HAS_HID_ACCESS); - case LIBUSB_CAP_SUPPORTS_DETACH_KERNEL_DRIVER: - return (usbi_backend.caps & USBI_CAP_SUPPORTS_DETACH_KERNEL_DRIVER); - } - return 0; -} - -#ifdef ENABLE_LOGGING - -/* this is defined in libusbi.h if needed */ -#ifdef LIBUSB_PRINTF_WIN32 -/* - * Prior to VS2015, Microsoft did not provide the snprintf() function and - * provided a vsnprintf() that did not guarantee NULL-terminated output. - * Microsoft did provide a _snprintf() function, but again it did not - * guarantee NULL-terminated output. - * - * The below implementations guarantee NULL-terminated output and are - * C99 compliant. - */ - -int usbi_snprintf(char *str, size_t size, const char *format, ...) -{ - va_list ap; - int ret; - - va_start(ap, format); - ret = usbi_vsnprintf(str, size, format, ap); - va_end(ap); - - return ret; -} - -int usbi_vsnprintf(char *str, size_t size, const char *format, va_list ap) -{ - int ret; - - ret = _vsnprintf(str, size, format, ap); - if (ret < 0 || ret == (int)size) { - /* Output is truncated, ensure buffer is NULL-terminated and - * determine how many characters would have been written. */ - str[size - 1] = '\0'; - if (ret < 0) - ret = _vsnprintf(NULL, 0, format, ap); - } - - return ret; -} -#endif /* LIBUSB_PRINTF_WIN32 */ - -static void usbi_log_str(enum libusb_log_level level, const char *str) -{ -#if defined(USE_SYSTEM_LOGGING_FACILITY) -#if defined(OS_WINDOWS) || defined(OS_WINCE) -#if !defined(UNICODE) - OutputDebugStringA(str); -#else - WCHAR wbuf[USBI_MAX_LOG_LEN]; - if (MultiByteToWideChar(CP_UTF8, 0, str, -1, wbuf, sizeof(wbuf)) != 0) - OutputDebugStringW(wbuf); -#endif -#elif defined(__ANDROID__) - int priority = ANDROID_LOG_UNKNOWN; - switch (level) { - case LIBUSB_LOG_LEVEL_NONE: return; - case LIBUSB_LOG_LEVEL_ERROR: priority = ANDROID_LOG_ERROR; break; - case LIBUSB_LOG_LEVEL_WARNING: priority = ANDROID_LOG_WARN; break; - case LIBUSB_LOG_LEVEL_INFO: priority = ANDROID_LOG_INFO; break; - case LIBUSB_LOG_LEVEL_DEBUG: priority = ANDROID_LOG_DEBUG; break; - } - __android_log_write(priority, "src", str); -#elif defined(HAVE_SYSLOG_FUNC) - int syslog_level = LOG_INFO; - switch (level) { - case LIBUSB_LOG_LEVEL_NONE: return; - case LIBUSB_LOG_LEVEL_ERROR: syslog_level = LOG_ERR; break; - case LIBUSB_LOG_LEVEL_WARNING: syslog_level = LOG_WARNING; break; - case LIBUSB_LOG_LEVEL_INFO: syslog_level = LOG_INFO; break; - case LIBUSB_LOG_LEVEL_DEBUG: syslog_level = LOG_DEBUG; break; - } - syslog(syslog_level, "%s", str); -#else /* All of gcc, Clang, Xcode seem to use #warning */ -#warning System logging is not supported on this platform. Logging to stderr will be used instead. - fputs(str, stderr); -#endif -#else - /* Global log handler */ - if (log_handler != NULL) - log_handler(NULL, level, str); - else - fputs(str, stderr); -#endif /* USE_SYSTEM_LOGGING_FACILITY */ - UNUSED(level); -} - -void usbi_log_v(struct libusb_context *ctx, enum libusb_log_level level, - const char *function, const char *format, va_list args) -{ - const char *prefix; - char buf[USBI_MAX_LOG_LEN]; - struct timespec now; - int global_debug, header_len, text_len; - static int has_debug_header_been_displayed = 0; - -#ifdef ENABLE_DEBUG_LOGGING - global_debug = 1; - UNUSED(ctx); -#else - enum libusb_log_level ctx_level = LIBUSB_LOG_LEVEL_NONE; - - USBI_GET_CONTEXT(ctx); - if (ctx) - ctx_level = ctx->debug; - else - ctx_level = get_env_debug_level(); - - if (ctx_level == LIBUSB_LOG_LEVEL_NONE) - return; - if (level == LIBUSB_LOG_LEVEL_WARNING && ctx_level < LIBUSB_LOG_LEVEL_WARNING) - return; - if (level == LIBUSB_LOG_LEVEL_INFO && ctx_level < LIBUSB_LOG_LEVEL_INFO) - return; - if (level == LIBUSB_LOG_LEVEL_DEBUG && ctx_level < LIBUSB_LOG_LEVEL_DEBUG) - return; - - global_debug = (ctx_level == LIBUSB_LOG_LEVEL_DEBUG); -#endif - - usbi_backend.clock_gettime(USBI_CLOCK_REALTIME, &now); - if ((global_debug) && (!has_debug_header_been_displayed)) { - has_debug_header_been_displayed = 1; - usbi_log_str(LIBUSB_LOG_LEVEL_DEBUG, "[timestamp] [threadID] facility level [function call] " USBI_LOG_LINE_END); - usbi_log_str(LIBUSB_LOG_LEVEL_DEBUG, "--------------------------------------------------------------------------------" USBI_LOG_LINE_END); - } - if (now.tv_nsec < timestamp_origin.tv_nsec) { - now.tv_sec--; - now.tv_nsec += 1000000000L; - } - now.tv_sec -= timestamp_origin.tv_sec; - now.tv_nsec -= timestamp_origin.tv_nsec; - - switch (level) { - case LIBUSB_LOG_LEVEL_NONE: - return; - case LIBUSB_LOG_LEVEL_ERROR: - prefix = "error"; - break; - case LIBUSB_LOG_LEVEL_WARNING: - prefix = "warning"; - break; - case LIBUSB_LOG_LEVEL_INFO: - prefix = "info"; - break; - case LIBUSB_LOG_LEVEL_DEBUG: - prefix = "debug"; - break; - default: - prefix = "unknown"; - break; - } - - if (global_debug) { - header_len = snprintf(buf, sizeof(buf), - "[%2ld.%06ld] [%08x] src: %s [%s] ", - (long)now.tv_sec, (long)(now.tv_nsec / 1000L), usbi_get_tid(), prefix, function); - } else { - header_len = snprintf(buf, sizeof(buf), - "src: %s [%s] ", prefix, function); - } - - if (header_len < 0 || header_len >= (int)sizeof(buf)) { - /* Somehow snprintf failed to write to the buffer, - * remove the header so something useful is output. */ - header_len = 0; - } - /* Make sure buffer is NUL terminated */ - buf[header_len] = '\0'; - text_len = vsnprintf(buf + header_len, sizeof(buf) - (size_t)header_len, - format, args); - if (text_len < 0 || text_len + header_len >= (int)sizeof(buf)) { - /* Truncated log output. On some platforms a -1 return value means - * that the output was truncated. */ - text_len = (int)sizeof(buf) - header_len; - } - if (header_len + text_len + (int)sizeof(USBI_LOG_LINE_END) >= (int)sizeof(buf)) { - /* Need to truncate the text slightly to fit on the terminator. */ - text_len -= (header_len + text_len + (int)sizeof(USBI_LOG_LINE_END)) - (int)sizeof(buf); - } - strcpy(buf + header_len + text_len, USBI_LOG_LINE_END); - - usbi_log_str(level, buf); - - /* Per context log handler */ -#ifndef ENABLE_DEBUG_LOGGING - if (ctx && ctx->log_handler) - ctx->log_handler(ctx, level, buf); -#endif -} - -void usbi_log(struct libusb_context *ctx, enum libusb_log_level level, - const char *function, const char *format, ...) -{ - va_list args; - - va_start (args, format); - usbi_log_v(ctx, level, function, format, args); - va_end (args); -} - -#endif /* ENABLE_LOGGING */ - -/** \ingroup libusb_misc - * Returns a constant NULL-terminated string with the ASCII name of a src - * error or transfer status code. The caller must not free() the returned - * string. - * - * \param error_code The \ref libusb_error or libusb_transfer_status code to - * return the name of. - * \returns The error name, or the string **UNKNOWN** if the value of - * error_code is not a known error / status code. - */ -DEFAULT_VISIBILITY const char * LIBUSB_CALL libusb_error_name(int error_code) -{ - switch (error_code) { - case LIBUSB_ERROR_IO: - return "LIBUSB_ERROR_IO"; - case LIBUSB_ERROR_INVALID_PARAM: - return "LIBUSB_ERROR_INVALID_PARAM"; - case LIBUSB_ERROR_ACCESS: - return "LIBUSB_ERROR_ACCESS"; - case LIBUSB_ERROR_NO_DEVICE: - return "LIBUSB_ERROR_NO_DEVICE"; - case LIBUSB_ERROR_NOT_FOUND: - return "LIBUSB_ERROR_NOT_FOUND"; - case LIBUSB_ERROR_BUSY: - return "LIBUSB_ERROR_BUSY"; - case LIBUSB_ERROR_TIMEOUT: - return "LIBUSB_ERROR_TIMEOUT"; - case LIBUSB_ERROR_OVERFLOW: - return "LIBUSB_ERROR_OVERFLOW"; - case LIBUSB_ERROR_PIPE: - return "LIBUSB_ERROR_PIPE"; - case LIBUSB_ERROR_INTERRUPTED: - return "LIBUSB_ERROR_INTERRUPTED"; - case LIBUSB_ERROR_NO_MEM: - return "LIBUSB_ERROR_NO_MEM"; - case LIBUSB_ERROR_NOT_SUPPORTED: - return "LIBUSB_ERROR_NOT_SUPPORTED"; - case LIBUSB_ERROR_OTHER: - return "LIBUSB_ERROR_OTHER"; - - case LIBUSB_TRANSFER_ERROR: - return "LIBUSB_TRANSFER_ERROR"; - case LIBUSB_TRANSFER_TIMED_OUT: - return "LIBUSB_TRANSFER_TIMED_OUT"; - case LIBUSB_TRANSFER_CANCELLED: - return "LIBUSB_TRANSFER_CANCELLED"; - case LIBUSB_TRANSFER_STALL: - return "LIBUSB_TRANSFER_STALL"; - case LIBUSB_TRANSFER_NO_DEVICE: - return "LIBUSB_TRANSFER_NO_DEVICE"; - case LIBUSB_TRANSFER_OVERFLOW: - return "LIBUSB_TRANSFER_OVERFLOW"; - - case 0: - return "LIBUSB_SUCCESS / LIBUSB_TRANSFER_COMPLETED"; - default: - return "**UNKNOWN**"; - } -} - -/** \ingroup libusb_misc - * Returns a pointer to const struct libusb_version with the version - * (major, minor, micro, nano and rc) of the running library. - */ -DEFAULT_VISIBILITY -const struct libusb_version * LIBUSB_CALL libusb_get_version(void) -{ - return &libusb_version_internal; -} diff --git a/c8_libusb/src/descriptor.c b/c8_libusb/src/descriptor.c deleted file mode 100644 index 16679b0..0000000 --- a/c8_libusb/src/descriptor.c +++ /dev/null @@ -1,1193 +0,0 @@ -/* -*- Mode: C; indent-tabs-mode:t ; c-basic-offset:8 -*- */ -/* - * USB descriptor handling functions for src - * Copyright © 2007 Daniel Drake - * Copyright © 2001 Johannes Erdfelt - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include "libusb_config.h" - -#include -#include -#include -#include - -#include "libusbi.h" - -#define DESC_HEADER_LENGTH 2 -#define DEVICE_DESC_LENGTH 18 -#define CONFIG_DESC_LENGTH 9 -#define INTERFACE_DESC_LENGTH 9 -#define ENDPOINT_DESC_LENGTH 7 -#define ENDPOINT_AUDIO_DESC_LENGTH 9 - -/** @defgroup libusb_desc USB descriptors - * This page details how to examine the various standard USB descriptors - * for detected devices - */ - -/* set host_endian if the w values are already in host endian format, - * as opposed to bus endian. */ -int usbi_parse_descriptor(const unsigned char *source, const char *descriptor, - void *dest, int host_endian) -{ - const unsigned char *sp = source; - unsigned char *dp = dest; - uint16_t w; - const char *cp; - uint32_t d; - - for (cp = descriptor; *cp; cp++) { - switch (*cp) { - case 'b': /* 8-bit byte */ - *dp++ = *sp++; - break; - case 'w': /* 16-bit word, convert from little endian to CPU */ - dp += ((uintptr_t)dp & 1); /* Align to word boundary */ - - if (host_endian) { - memcpy(dp, sp, 2); - } else { - w = (uint16_t)((sp[1] << 8) | sp[0]); - *((uint16_t *)dp) = w; - } - sp += 2; - dp += 2; - break; - case 'd': /* 32-bit word, convert from little endian to CPU */ - dp += ((uintptr_t)dp & 1); /* Align to word boundary */ - - if (host_endian) { - memcpy(dp, sp, 4); - } else { - d = (uint32_t)((sp[3] << 24) | (sp[2] << 16) | - (sp[1] << 8) | sp[0]); - *((uint32_t *)dp) = d; - } - sp += 4; - dp += 4; - break; - case 'u': /* 16 byte UUID */ - memcpy(dp, sp, 16); - sp += 16; - dp += 16; - break; - } - } - - return (int) (sp - source); -} - -static void clear_endpoint(struct libusb_endpoint_descriptor *endpoint) -{ - free((void *) endpoint->extra); -} - -static int parse_endpoint(struct libusb_context *ctx, - struct libusb_endpoint_descriptor *endpoint, unsigned char *buffer, - int size, int host_endian) -{ - struct usb_descriptor_header header; - unsigned char *extra; - unsigned char *begin; - int parsed = 0; - int len; - - if (size < DESC_HEADER_LENGTH) { - usbi_err(ctx, "short endpoint descriptor read %d/%d", - size, DESC_HEADER_LENGTH); - return LIBUSB_ERROR_IO; - } - - usbi_parse_descriptor(buffer, "bb", &header, 0); - if (header.bDescriptorType != LIBUSB_DT_ENDPOINT) { - usbi_err(ctx, "unexpected descriptor %x (expected %x)", - header.bDescriptorType, LIBUSB_DT_ENDPOINT); - return parsed; - } - if (header.bLength > size) { - usbi_warn(ctx, "short endpoint descriptor read %d/%d", - size, header.bLength); - return parsed; - } - if (header.bLength >= ENDPOINT_AUDIO_DESC_LENGTH) - usbi_parse_descriptor(buffer, "bbbbwbbb", endpoint, host_endian); - else if (header.bLength >= ENDPOINT_DESC_LENGTH) - usbi_parse_descriptor(buffer, "bbbbwb", endpoint, host_endian); - else { - usbi_err(ctx, "invalid endpoint bLength (%d)", header.bLength); - return LIBUSB_ERROR_IO; - } - - buffer += header.bLength; - size -= header.bLength; - parsed += header.bLength; - - /* Skip over the rest of the Class Specific or Vendor Specific */ - /* descriptors */ - begin = buffer; - while (size >= DESC_HEADER_LENGTH) { - usbi_parse_descriptor(buffer, "bb", &header, 0); - if (header.bLength < DESC_HEADER_LENGTH) { - usbi_err(ctx, "invalid extra ep desc len (%d)", - header.bLength); - return LIBUSB_ERROR_IO; - } else if (header.bLength > size) { - usbi_warn(ctx, "short extra ep desc read %d/%d", - size, header.bLength); - return parsed; - } - - /* If we find another "proper" descriptor then we're done */ - if ((header.bDescriptorType == LIBUSB_DT_ENDPOINT) || - (header.bDescriptorType == LIBUSB_DT_INTERFACE) || - (header.bDescriptorType == LIBUSB_DT_CONFIG) || - (header.bDescriptorType == LIBUSB_DT_DEVICE)) - break; - - usbi_dbg("skipping descriptor %x", header.bDescriptorType); - buffer += header.bLength; - size -= header.bLength; - parsed += header.bLength; - } - - /* Copy any unknown descriptors into a storage area for drivers */ - /* to later parse */ - len = (int)(buffer - begin); - if (len <= 0) { - endpoint->extra = NULL; - endpoint->extra_length = 0; - return parsed; - } - - extra = malloc((size_t)len); - endpoint->extra = extra; - if (!extra) { - endpoint->extra_length = 0; - return LIBUSB_ERROR_NO_MEM; - } - - memcpy(extra, begin, len); - endpoint->extra_length = len; - - return parsed; -} - -static void clear_interface(struct libusb_interface *usb_interface) -{ - int i; - int j; - - if (usb_interface->altsetting) { - for (i = 0; i < usb_interface->num_altsetting; i++) { - struct libusb_interface_descriptor *ifp = - (struct libusb_interface_descriptor *) - usb_interface->altsetting + i; - free((void *) ifp->extra); - if (ifp->endpoint) { - for (j = 0; j < ifp->bNumEndpoints; j++) - clear_endpoint((struct libusb_endpoint_descriptor *) - ifp->endpoint + j); - } - free((void *) ifp->endpoint); - } - } - free((void *) usb_interface->altsetting); - usb_interface->altsetting = NULL; -} - -static int parse_interface(libusb_context *ctx, - struct libusb_interface *usb_interface, unsigned char *buffer, int size, - int host_endian) -{ - int i; - int len; - int r; - int parsed = 0; - int interface_number = -1; - struct usb_descriptor_header header; - struct libusb_interface_descriptor *ifp; - unsigned char *begin; - - usb_interface->num_altsetting = 0; - - while (size >= INTERFACE_DESC_LENGTH) { - struct libusb_interface_descriptor *altsetting = - (struct libusb_interface_descriptor *) usb_interface->altsetting; - altsetting = usbi_reallocf(altsetting, - sizeof(struct libusb_interface_descriptor) * - ((size_t)usb_interface->num_altsetting + 1)); - if (!altsetting) { - r = LIBUSB_ERROR_NO_MEM; - goto err; - } - usb_interface->altsetting = altsetting; - - ifp = altsetting + usb_interface->num_altsetting; - usbi_parse_descriptor(buffer, "bbbbbbbbb", ifp, 0); - if (ifp->bDescriptorType != LIBUSB_DT_INTERFACE) { - usbi_err(ctx, "unexpected descriptor %x (expected %x)", - ifp->bDescriptorType, LIBUSB_DT_INTERFACE); - return parsed; - } - if (ifp->bLength < INTERFACE_DESC_LENGTH) { - usbi_err(ctx, "invalid interface bLength (%d)", - ifp->bLength); - r = LIBUSB_ERROR_IO; - goto err; - } - if (ifp->bLength > size) { - usbi_warn(ctx, "short intf descriptor read %d/%d", - size, ifp->bLength); - return parsed; - } - if (ifp->bNumEndpoints > USB_MAXENDPOINTS) { - usbi_err(ctx, "too many endpoints (%d)", ifp->bNumEndpoints); - r = LIBUSB_ERROR_IO; - goto err; - } - - usb_interface->num_altsetting++; - ifp->extra = NULL; - ifp->extra_length = 0; - ifp->endpoint = NULL; - - if (interface_number == -1) - interface_number = ifp->bInterfaceNumber; - - /* Skip over the interface */ - buffer += ifp->bLength; - parsed += ifp->bLength; - size -= ifp->bLength; - - begin = buffer; - - /* Skip over any interface, class or vendor descriptors */ - while (size >= DESC_HEADER_LENGTH) { - usbi_parse_descriptor(buffer, "bb", &header, 0); - if (header.bLength < DESC_HEADER_LENGTH) { - usbi_err(ctx, - "invalid extra intf desc len (%d)", - header.bLength); - r = LIBUSB_ERROR_IO; - goto err; - } else if (header.bLength > size) { - usbi_warn(ctx, - "short extra intf desc read %d/%d", - size, header.bLength); - return parsed; - } - - /* If we find another "proper" descriptor then we're done */ - if ((header.bDescriptorType == LIBUSB_DT_INTERFACE) || - (header.bDescriptorType == LIBUSB_DT_ENDPOINT) || - (header.bDescriptorType == LIBUSB_DT_CONFIG) || - (header.bDescriptorType == LIBUSB_DT_DEVICE)) - break; - - buffer += header.bLength; - parsed += header.bLength; - size -= header.bLength; - } - - /* Copy any unknown descriptors into a storage area for */ - /* drivers to later parse */ - len = (int)(buffer - begin); - if (len > 0) { - ifp->extra = malloc((size_t)len); - if (!ifp->extra) { - r = LIBUSB_ERROR_NO_MEM; - goto err; - } - memcpy((unsigned char *) ifp->extra, begin, len); - ifp->extra_length = len; - } - - if (ifp->bNumEndpoints > 0) { - struct libusb_endpoint_descriptor *endpoint; - endpoint = calloc(ifp->bNumEndpoints, sizeof(struct libusb_endpoint_descriptor)); - ifp->endpoint = endpoint; - if (!endpoint) { - r = LIBUSB_ERROR_NO_MEM; - goto err; - } - - for (i = 0; i < ifp->bNumEndpoints; i++) { - r = parse_endpoint(ctx, endpoint + i, buffer, size, - host_endian); - if (r < 0) - goto err; - if (r == 0) { - ifp->bNumEndpoints = (uint8_t)i; - break; - } - - buffer += r; - parsed += r; - size -= r; - } - } - - /* We check to see if it's an alternate to this one */ - ifp = (struct libusb_interface_descriptor *) buffer; - if (size < LIBUSB_DT_INTERFACE_SIZE || - ifp->bDescriptorType != LIBUSB_DT_INTERFACE || - ifp->bInterfaceNumber != interface_number) - return parsed; - } - - return parsed; -err: - clear_interface(usb_interface); - return r; -} - -static void clear_configuration(struct libusb_config_descriptor *config) -{ - int i; - if (config->interface) { - for (i = 0; i < config->bNumInterfaces; i++) - clear_interface((struct libusb_interface *) - config->interface + i); - } - free((void *) config->interface); - free((void *) config->extra); -} - -static int parse_configuration(struct libusb_context *ctx, - struct libusb_config_descriptor *config, unsigned char *buffer, - int size, int host_endian) -{ - int i; - int r; - struct usb_descriptor_header header; - struct libusb_interface *usb_interface; - - if (size < LIBUSB_DT_CONFIG_SIZE) { - usbi_err(ctx, "short config descriptor read %d/%d", - size, LIBUSB_DT_CONFIG_SIZE); - return LIBUSB_ERROR_IO; - } - - usbi_parse_descriptor(buffer, "bbwbbbbb", config, host_endian); - if (config->bDescriptorType != LIBUSB_DT_CONFIG) { - usbi_err(ctx, "unexpected descriptor %x (expected %x)", - config->bDescriptorType, LIBUSB_DT_CONFIG); - return LIBUSB_ERROR_IO; - } - if (config->bLength < LIBUSB_DT_CONFIG_SIZE) { - usbi_err(ctx, "invalid config bLength (%d)", config->bLength); - return LIBUSB_ERROR_IO; - } - if (config->bLength > size) { - usbi_err(ctx, "short config descriptor read %d/%d", - size, config->bLength); - return LIBUSB_ERROR_IO; - } - if (config->bNumInterfaces > USB_MAXINTERFACES) { - usbi_err(ctx, "too many interfaces (%d)", config->bNumInterfaces); - return LIBUSB_ERROR_IO; - } - - usb_interface = calloc(config->bNumInterfaces, sizeof(struct libusb_interface)); - config->interface = usb_interface; - if (!usb_interface) - return LIBUSB_ERROR_NO_MEM; - - buffer += config->bLength; - size -= config->bLength; - - config->extra = NULL; - config->extra_length = 0; - - for (i = 0; i < config->bNumInterfaces; i++) { - int len; - unsigned char *begin; - - /* Skip over the rest of the Class Specific or Vendor */ - /* Specific descriptors */ - begin = buffer; - while (size >= DESC_HEADER_LENGTH) { - usbi_parse_descriptor(buffer, "bb", &header, 0); - - if (header.bLength < DESC_HEADER_LENGTH) { - usbi_err(ctx, - "invalid extra config desc len (%d)", - header.bLength); - r = LIBUSB_ERROR_IO; - goto err; - } else if (header.bLength > size) { - usbi_warn(ctx, - "short extra config desc read %d/%d", - size, header.bLength); - config->bNumInterfaces = (uint8_t)i; - return size; - } - - /* If we find another "proper" descriptor then we're done */ - if ((header.bDescriptorType == LIBUSB_DT_ENDPOINT) || - (header.bDescriptorType == LIBUSB_DT_INTERFACE) || - (header.bDescriptorType == LIBUSB_DT_CONFIG) || - (header.bDescriptorType == LIBUSB_DT_DEVICE)) - break; - - usbi_dbg("skipping descriptor 0x%x", header.bDescriptorType); - buffer += header.bLength; - size -= header.bLength; - } - - /* Copy any unknown descriptors into a storage area for */ - /* drivers to later parse */ - len = (int)(buffer - begin); - if (len > 0) { - /* FIXME: We should realloc and append here */ - if (!config->extra_length) { - config->extra = malloc((size_t)len); - if (!config->extra) { - r = LIBUSB_ERROR_NO_MEM; - goto err; - } - - memcpy((unsigned char *) config->extra, begin, len); - config->extra_length = len; - } - } - - r = parse_interface(ctx, usb_interface + i, buffer, size, host_endian); - if (r < 0) - goto err; - if (r == 0) { - config->bNumInterfaces = (uint8_t)i; - break; - } - - buffer += r; - size -= r; - } - - return size; - -err: - clear_configuration(config); - return r; -} - -static int raw_desc_to_config(struct libusb_context *ctx, - unsigned char *buf, int size, int host_endian, - struct libusb_config_descriptor **config) -{ - struct libusb_config_descriptor *_config = malloc(sizeof(*_config)); - int r; - - if (!_config) - return LIBUSB_ERROR_NO_MEM; - - r = parse_configuration(ctx, _config, buf, size, host_endian); - if (r < 0) { - usbi_err(ctx, "parse_configuration failed with error %d", r); - free(_config); - return r; - } else if (r > 0) { - usbi_warn(ctx, "still %d bytes of descriptor data left", r); - } - - *config = _config; - return LIBUSB_SUCCESS; -} - -int usbi_device_cache_descriptor(libusb_device *dev) -{ - int r, host_endian = 0; - - r = usbi_backend.get_device_descriptor(dev, (unsigned char *) &dev->device_descriptor, - &host_endian); - if (r < 0) - return r; - - if (!host_endian) { - dev->device_descriptor.bcdUSB = libusb_le16_to_cpu(dev->device_descriptor.bcdUSB); - dev->device_descriptor.idVendor = libusb_le16_to_cpu(dev->device_descriptor.idVendor); - dev->device_descriptor.idProduct = libusb_le16_to_cpu(dev->device_descriptor.idProduct); - dev->device_descriptor.bcdDevice = libusb_le16_to_cpu(dev->device_descriptor.bcdDevice); - } - - return LIBUSB_SUCCESS; -} - -/** \ingroup libusb_desc - * Get the USB device descriptor for a given device. - * - * This is a non-blocking function; the device descriptor is cached in memory. - * - * Note since src-1.0.16, \ref LIBUSB_API_VERSION >= 0x01000102, this - * function always succeeds. - * - * \param dev the device - * \param desc output location for the descriptor data - * \returns 0 on success or a LIBUSB_ERROR code on failure - */ -int API_EXPORTED libusb_get_device_descriptor(libusb_device *dev, - struct libusb_device_descriptor *desc) -{ - usbi_dbg(""); - memcpy((unsigned char *) desc, (unsigned char *) &dev->device_descriptor, - sizeof (dev->device_descriptor)); - return 0; -} - -/** \ingroup libusb_desc - * Get the USB configuration descriptor for the currently active configuration. - * This is a non-blocking function which does not involve any requests being - * sent to the device. - * - * \param dev a device - * \param config output location for the USB configuration descriptor. Only - * valid if 0 was returned. Must be freed with libusb_free_config_descriptor() - * after use. - * \returns 0 on success - * \returns LIBUSB_ERROR_NOT_FOUND if the device is in unconfigured state - * \returns another LIBUSB_ERROR code on error - * \see libusb_get_config_descriptor - */ -int API_EXPORTED libusb_get_active_config_descriptor(libusb_device *dev, - struct libusb_config_descriptor **config) -{ - struct libusb_config_descriptor _config; - unsigned char tmp[LIBUSB_DT_CONFIG_SIZE]; - unsigned char *buf = NULL; - int host_endian = 0; - int r; - - r = usbi_backend.get_active_config_descriptor(dev, tmp, - LIBUSB_DT_CONFIG_SIZE, &host_endian); - if (r < 0) - return r; - if (r < LIBUSB_DT_CONFIG_SIZE) { - usbi_err(dev->ctx, "short config descriptor read %d/%d", - r, LIBUSB_DT_CONFIG_SIZE); - return LIBUSB_ERROR_IO; - } - - usbi_parse_descriptor(tmp, "bbw", &_config, host_endian); - buf = malloc(_config.wTotalLength); - if (!buf) - return LIBUSB_ERROR_NO_MEM; - - r = usbi_backend.get_active_config_descriptor(dev, buf, - _config.wTotalLength, &host_endian); - if (r >= 0) - r = raw_desc_to_config(dev->ctx, buf, r, host_endian, config); - - free(buf); - return r; -} - -/** \ingroup libusb_desc - * Get a USB configuration descriptor based on its index. - * This is a non-blocking function which does not involve any requests being - * sent to the device. - * - * \param dev a device - * \param config_index the index of the configuration you wish to retrieve - * \param config output location for the USB configuration descriptor. Only - * valid if 0 was returned. Must be freed with libusb_free_config_descriptor() - * after use. - * \returns 0 on success - * \returns LIBUSB_ERROR_NOT_FOUND if the configuration does not exist - * \returns another LIBUSB_ERROR code on error - * \see libusb_get_active_config_descriptor() - * \see libusb_get_config_descriptor_by_value() - */ -int API_EXPORTED libusb_get_config_descriptor(libusb_device *dev, - uint8_t config_index, struct libusb_config_descriptor **config) -{ - struct libusb_config_descriptor _config; - unsigned char tmp[LIBUSB_DT_CONFIG_SIZE]; - unsigned char *buf = NULL; - int host_endian = 0; - int r; - - usbi_dbg("index %d", config_index); - if (config_index >= dev->num_configurations) - return LIBUSB_ERROR_NOT_FOUND; - - r = usbi_backend.get_config_descriptor(dev, config_index, tmp, - LIBUSB_DT_CONFIG_SIZE, &host_endian); - if (r < 0) - return r; - if (r < LIBUSB_DT_CONFIG_SIZE) { - usbi_err(dev->ctx, "short config descriptor read %d/%d", - r, LIBUSB_DT_CONFIG_SIZE); - return LIBUSB_ERROR_IO; - } - - usbi_parse_descriptor(tmp, "bbw", &_config, host_endian); - buf = malloc(_config.wTotalLength); - if (!buf) - return LIBUSB_ERROR_NO_MEM; - - r = usbi_backend.get_config_descriptor(dev, config_index, buf, - _config.wTotalLength, &host_endian); - if (r >= 0) - r = raw_desc_to_config(dev->ctx, buf, r, host_endian, config); - - free(buf); - return r; -} - -/* iterate through all configurations, returning the index of the configuration - * matching a specific bConfigurationValue in the idx output parameter, or -1 - * if the config was not found. - * returns 0 on success or a LIBUSB_ERROR code - */ -int usbi_get_config_index_by_value(struct libusb_device *dev, - uint8_t bConfigurationValue, int *idx) -{ - uint8_t i; - - usbi_dbg("value %d", bConfigurationValue); - for (i = 0; i < dev->num_configurations; i++) { - unsigned char tmp[6]; - int host_endian; - int r = usbi_backend.get_config_descriptor(dev, i, tmp, sizeof(tmp), - &host_endian); - if (r < 0) { - *idx = -1; - return r; - } - if (tmp[5] == bConfigurationValue) { - *idx = i; - return 0; - } - } - - *idx = -1; - return 0; -} - -/** \ingroup libusb_desc - * Get a USB configuration descriptor with a specific bConfigurationValue. - * This is a non-blocking function which does not involve any requests being - * sent to the device. - * - * \param dev a device - * \param bConfigurationValue the bConfigurationValue of the configuration you - * wish to retrieve - * \param config output location for the USB configuration descriptor. Only - * valid if 0 was returned. Must be freed with libusb_free_config_descriptor() - * after use. - * \returns 0 on success - * \returns LIBUSB_ERROR_NOT_FOUND if the configuration does not exist - * \returns another LIBUSB_ERROR code on error - * \see libusb_get_active_config_descriptor() - * \see libusb_get_config_descriptor() - */ -int API_EXPORTED libusb_get_config_descriptor_by_value(libusb_device *dev, - uint8_t bConfigurationValue, struct libusb_config_descriptor **config) -{ - int r, idx, host_endian; - unsigned char *buf = NULL; - - if (usbi_backend.get_config_descriptor_by_value) { - r = usbi_backend.get_config_descriptor_by_value(dev, - bConfigurationValue, &buf, &host_endian); - if (r < 0) - return r; - return raw_desc_to_config(dev->ctx, buf, r, host_endian, config); - } - - r = usbi_get_config_index_by_value(dev, bConfigurationValue, &idx); - if (r < 0) - return r; - else if (idx == -1) - return LIBUSB_ERROR_NOT_FOUND; - else - return libusb_get_config_descriptor(dev, (uint8_t) idx, config); -} - -/** \ingroup libusb_desc - * Free a configuration descriptor obtained from - * libusb_get_active_config_descriptor() or libusb_get_config_descriptor(). - * It is safe to call this function with a NULL config parameter, in which - * case the function simply returns. - * - * \param config the configuration descriptor to free - */ -void API_EXPORTED libusb_free_config_descriptor( - struct libusb_config_descriptor *config) -{ - if (!config) - return; - - clear_configuration(config); - free(config); -} - -/** \ingroup libusb_desc - * Get an endpoints superspeed endpoint companion descriptor (if any) - * - * \param ctx the context to operate on, or NULL for the default context - * \param endpoint endpoint descriptor from which to get the superspeed - * endpoint companion descriptor - * \param ep_comp output location for the superspeed endpoint companion - * descriptor. Only valid if 0 was returned. Must be freed with - * libusb_free_ss_endpoint_companion_descriptor() after use. - * \returns 0 on success - * \returns LIBUSB_ERROR_NOT_FOUND if the configuration does not exist - * \returns another LIBUSB_ERROR code on error - */ -int API_EXPORTED libusb_get_ss_endpoint_companion_descriptor( - struct libusb_context *ctx, - const struct libusb_endpoint_descriptor *endpoint, - struct libusb_ss_endpoint_companion_descriptor **ep_comp) -{ - struct usb_descriptor_header header; - int size = endpoint->extra_length; - const unsigned char *buffer = endpoint->extra; - - *ep_comp = NULL; - - while (size >= DESC_HEADER_LENGTH) { - usbi_parse_descriptor(buffer, "bb", &header, 0); - if (header.bLength < 2 || header.bLength > size) { - usbi_err(ctx, "invalid descriptor length %d", - header.bLength); - return LIBUSB_ERROR_IO; - } - if (header.bDescriptorType != LIBUSB_DT_SS_ENDPOINT_COMPANION) { - buffer += header.bLength; - size -= header.bLength; - continue; - } - if (header.bLength < LIBUSB_DT_SS_ENDPOINT_COMPANION_SIZE) { - usbi_err(ctx, "invalid ss-ep-comp-desc length %d", - header.bLength); - return LIBUSB_ERROR_IO; - } - *ep_comp = malloc(sizeof(**ep_comp)); - if (*ep_comp == NULL) - return LIBUSB_ERROR_NO_MEM; - usbi_parse_descriptor(buffer, "bbbbw", *ep_comp, 0); - return LIBUSB_SUCCESS; - } - return LIBUSB_ERROR_NOT_FOUND; -} - -/** \ingroup libusb_desc - * Free a superspeed endpoint companion descriptor obtained from - * libusb_get_ss_endpoint_companion_descriptor(). - * It is safe to call this function with a NULL ep_comp parameter, in which - * case the function simply returns. - * - * \param ep_comp the superspeed endpoint companion descriptor to free - */ -void API_EXPORTED libusb_free_ss_endpoint_companion_descriptor( - struct libusb_ss_endpoint_companion_descriptor *ep_comp) -{ - free(ep_comp); -} - -static int parse_bos(struct libusb_context *ctx, - struct libusb_bos_descriptor **bos, - unsigned char *buffer, int size, int host_endian) -{ - struct libusb_bos_descriptor bos_header, *_bos; - struct libusb_bos_dev_capability_descriptor dev_cap; - int i; - - if (size < LIBUSB_DT_BOS_SIZE) { - usbi_err(ctx, "short bos descriptor read %d/%d", - size, LIBUSB_DT_BOS_SIZE); - return LIBUSB_ERROR_IO; - } - - usbi_parse_descriptor(buffer, "bbwb", &bos_header, host_endian); - if (bos_header.bDescriptorType != LIBUSB_DT_BOS) { - usbi_err(ctx, "unexpected descriptor %x (expected %x)", - bos_header.bDescriptorType, LIBUSB_DT_BOS); - return LIBUSB_ERROR_IO; - } - if (bos_header.bLength < LIBUSB_DT_BOS_SIZE) { - usbi_err(ctx, "invalid bos bLength (%d)", bos_header.bLength); - return LIBUSB_ERROR_IO; - } - if (bos_header.bLength > size) { - usbi_err(ctx, "short bos descriptor read %d/%d", - size, bos_header.bLength); - return LIBUSB_ERROR_IO; - } - - _bos = calloc (1, - sizeof(*_bos) + bos_header.bNumDeviceCaps * sizeof(void *)); - if (!_bos) - return LIBUSB_ERROR_NO_MEM; - - usbi_parse_descriptor(buffer, "bbwb", _bos, host_endian); - buffer += bos_header.bLength; - size -= bos_header.bLength; - - /* Get the device capability descriptors */ - for (i = 0; i < bos_header.bNumDeviceCaps; i++) { - if (size < LIBUSB_DT_DEVICE_CAPABILITY_SIZE) { - usbi_warn(ctx, "short dev-cap descriptor read %d/%d", - size, LIBUSB_DT_DEVICE_CAPABILITY_SIZE); - break; - } - usbi_parse_descriptor(buffer, "bbb", &dev_cap, host_endian); - if (dev_cap.bDescriptorType != LIBUSB_DT_DEVICE_CAPABILITY) { - usbi_warn(ctx, "unexpected descriptor %x (expected %x)", - dev_cap.bDescriptorType, LIBUSB_DT_DEVICE_CAPABILITY); - break; - } - if (dev_cap.bLength < LIBUSB_DT_DEVICE_CAPABILITY_SIZE) { - usbi_err(ctx, "invalid dev-cap bLength (%d)", - dev_cap.bLength); - libusb_free_bos_descriptor(_bos); - return LIBUSB_ERROR_IO; - } - if (dev_cap.bLength > size) { - usbi_warn(ctx, "short dev-cap descriptor read %d/%d", - size, dev_cap.bLength); - break; - } - - _bos->dev_capability[i] = malloc(dev_cap.bLength); - if (!_bos->dev_capability[i]) { - libusb_free_bos_descriptor(_bos); - return LIBUSB_ERROR_NO_MEM; - } - memcpy(_bos->dev_capability[i], buffer, dev_cap.bLength); - buffer += dev_cap.bLength; - size -= dev_cap.bLength; - } - _bos->bNumDeviceCaps = (uint8_t)i; - *bos = _bos; - - return LIBUSB_SUCCESS; -} - -/** \ingroup libusb_desc - * Get a Binary Object Store (BOS) descriptor - * This is a BLOCKING function, which will send requests to the device. - * - * \param dev_handle the handle of an open src device - * \param bos output location for the BOS descriptor. Only valid if 0 was returned. - * Must be freed with \ref libusb_free_bos_descriptor() after use. - * \returns 0 on success - * \returns LIBUSB_ERROR_NOT_FOUND if the device doesn't have a BOS descriptor - * \returns another LIBUSB_ERROR code on error - */ -int API_EXPORTED libusb_get_bos_descriptor(libusb_device_handle *dev_handle, - struct libusb_bos_descriptor **bos) -{ - struct libusb_bos_descriptor _bos; - uint8_t bos_header[LIBUSB_DT_BOS_SIZE] = {0}; - unsigned char *bos_data = NULL; - const int host_endian = 0; - int r; - - /* Read the BOS. This generates 2 requests on the bus, - * one for the header, and one for the full BOS */ - r = libusb_get_descriptor(dev_handle, LIBUSB_DT_BOS, 0, bos_header, - LIBUSB_DT_BOS_SIZE); - if (r < 0) { - if (r != LIBUSB_ERROR_PIPE) - usbi_err(HANDLE_CTX(dev_handle), "failed to read BOS (%d)", r); - return r; - } - if (r < LIBUSB_DT_BOS_SIZE) { - usbi_err(HANDLE_CTX(dev_handle), "short BOS read %d/%d", - r, LIBUSB_DT_BOS_SIZE); - return LIBUSB_ERROR_IO; - } - - usbi_parse_descriptor(bos_header, "bbwb", &_bos, host_endian); - usbi_dbg("found BOS descriptor: size %d bytes, %d capabilities", - _bos.wTotalLength, _bos.bNumDeviceCaps); - bos_data = calloc(_bos.wTotalLength, 1); - if (bos_data == NULL) - return LIBUSB_ERROR_NO_MEM; - - r = libusb_get_descriptor(dev_handle, LIBUSB_DT_BOS, 0, bos_data, - _bos.wTotalLength); - if (r >= 0) - r = parse_bos(HANDLE_CTX(dev_handle), bos, bos_data, r, host_endian); - else - usbi_err(HANDLE_CTX(dev_handle), "failed to read BOS (%d)", r); - - free(bos_data); - return r; -} - -/** \ingroup libusb_desc - * Free a BOS descriptor obtained from libusb_get_bos_descriptor(). - * It is safe to call this function with a NULL bos parameter, in which - * case the function simply returns. - * - * \param bos the BOS descriptor to free - */ -void API_EXPORTED libusb_free_bos_descriptor(struct libusb_bos_descriptor *bos) -{ - int i; - - if (!bos) - return; - - for (i = 0; i < bos->bNumDeviceCaps; i++) - free(bos->dev_capability[i]); - free(bos); -} - -/** \ingroup libusb_desc - * Get an USB 2.0 Extension descriptor - * - * \param ctx the context to operate on, or NULL for the default context - * \param dev_cap Device Capability descriptor with a bDevCapabilityType of - * \ref libusb_capability_type::LIBUSB_BT_USB_2_0_EXTENSION - * LIBUSB_BT_USB_2_0_EXTENSION - * \param usb_2_0_extension output location for the USB 2.0 Extension - * descriptor. Only valid if 0 was returned. Must be freed with - * libusb_free_usb_2_0_extension_descriptor() after use. - * \returns 0 on success - * \returns a LIBUSB_ERROR code on error - */ -int API_EXPORTED libusb_get_usb_2_0_extension_descriptor( - struct libusb_context *ctx, - struct libusb_bos_dev_capability_descriptor *dev_cap, - struct libusb_usb_2_0_extension_descriptor **usb_2_0_extension) -{ - struct libusb_usb_2_0_extension_descriptor *_usb_2_0_extension; - const int host_endian = 0; - - if (dev_cap->bDevCapabilityType != LIBUSB_BT_USB_2_0_EXTENSION) { - usbi_err(ctx, "unexpected bDevCapabilityType %x (expected %x)", - dev_cap->bDevCapabilityType, - LIBUSB_BT_USB_2_0_EXTENSION); - return LIBUSB_ERROR_INVALID_PARAM; - } - if (dev_cap->bLength < LIBUSB_BT_USB_2_0_EXTENSION_SIZE) { - usbi_err(ctx, "short dev-cap descriptor read %d/%d", - dev_cap->bLength, LIBUSB_BT_USB_2_0_EXTENSION_SIZE); - return LIBUSB_ERROR_IO; - } - - _usb_2_0_extension = malloc(sizeof(*_usb_2_0_extension)); - if (!_usb_2_0_extension) - return LIBUSB_ERROR_NO_MEM; - - usbi_parse_descriptor((unsigned char *)dev_cap, "bbbd", - _usb_2_0_extension, host_endian); - - *usb_2_0_extension = _usb_2_0_extension; - return LIBUSB_SUCCESS; -} - -/** \ingroup libusb_desc - * Free a USB 2.0 Extension descriptor obtained from - * libusb_get_usb_2_0_extension_descriptor(). - * It is safe to call this function with a NULL usb_2_0_extension parameter, - * in which case the function simply returns. - * - * \param usb_2_0_extension the USB 2.0 Extension descriptor to free - */ -void API_EXPORTED libusb_free_usb_2_0_extension_descriptor( - struct libusb_usb_2_0_extension_descriptor *usb_2_0_extension) -{ - free(usb_2_0_extension); -} - -/** \ingroup libusb_desc - * Get a SuperSpeed USB Device Capability descriptor - * - * \param ctx the context to operate on, or NULL for the default context - * \param dev_cap Device Capability descriptor with a bDevCapabilityType of - * \ref libusb_capability_type::LIBUSB_BT_SS_USB_DEVICE_CAPABILITY - * LIBUSB_BT_SS_USB_DEVICE_CAPABILITY - * \param ss_usb_device_cap output location for the SuperSpeed USB Device - * Capability descriptor. Only valid if 0 was returned. Must be freed with - * libusb_free_ss_usb_device_capability_descriptor() after use. - * \returns 0 on success - * \returns a LIBUSB_ERROR code on error - */ -int API_EXPORTED libusb_get_ss_usb_device_capability_descriptor( - struct libusb_context *ctx, - struct libusb_bos_dev_capability_descriptor *dev_cap, - struct libusb_ss_usb_device_capability_descriptor **ss_usb_device_cap) -{ - struct libusb_ss_usb_device_capability_descriptor *_ss_usb_device_cap; - const int host_endian = 0; - - if (dev_cap->bDevCapabilityType != LIBUSB_BT_SS_USB_DEVICE_CAPABILITY) { - usbi_err(ctx, "unexpected bDevCapabilityType %x (expected %x)", - dev_cap->bDevCapabilityType, - LIBUSB_BT_SS_USB_DEVICE_CAPABILITY); - return LIBUSB_ERROR_INVALID_PARAM; - } - if (dev_cap->bLength < LIBUSB_BT_SS_USB_DEVICE_CAPABILITY_SIZE) { - usbi_err(ctx, "short dev-cap descriptor read %d/%d", - dev_cap->bLength, LIBUSB_BT_SS_USB_DEVICE_CAPABILITY_SIZE); - return LIBUSB_ERROR_IO; - } - - _ss_usb_device_cap = malloc(sizeof(*_ss_usb_device_cap)); - if (!_ss_usb_device_cap) - return LIBUSB_ERROR_NO_MEM; - - usbi_parse_descriptor((unsigned char *)dev_cap, "bbbbwbbw", - _ss_usb_device_cap, host_endian); - - *ss_usb_device_cap = _ss_usb_device_cap; - return LIBUSB_SUCCESS; -} - -/** \ingroup libusb_desc - * Free a SuperSpeed USB Device Capability descriptor obtained from - * libusb_get_ss_usb_device_capability_descriptor(). - * It is safe to call this function with a NULL ss_usb_device_cap - * parameter, in which case the function simply returns. - * - * \param ss_usb_device_cap the SuperSpeed USB Device Capability descriptor - * to free - */ -void API_EXPORTED libusb_free_ss_usb_device_capability_descriptor( - struct libusb_ss_usb_device_capability_descriptor *ss_usb_device_cap) -{ - free(ss_usb_device_cap); -} - -/** \ingroup libusb_desc - * Get a Container ID descriptor - * - * \param ctx the context to operate on, or NULL for the default context - * \param dev_cap Device Capability descriptor with a bDevCapabilityType of - * \ref libusb_capability_type::LIBUSB_BT_CONTAINER_ID - * LIBUSB_BT_CONTAINER_ID - * \param container_id output location for the Container ID descriptor. - * Only valid if 0 was returned. Must be freed with - * libusb_free_container_id_descriptor() after use. - * \returns 0 on success - * \returns a LIBUSB_ERROR code on error - */ -int API_EXPORTED libusb_get_container_id_descriptor(struct libusb_context *ctx, - struct libusb_bos_dev_capability_descriptor *dev_cap, - struct libusb_container_id_descriptor **container_id) -{ - struct libusb_container_id_descriptor *_container_id; - const int host_endian = 0; - - if (dev_cap->bDevCapabilityType != LIBUSB_BT_CONTAINER_ID) { - usbi_err(ctx, "unexpected bDevCapabilityType %x (expected %x)", - dev_cap->bDevCapabilityType, - LIBUSB_BT_CONTAINER_ID); - return LIBUSB_ERROR_INVALID_PARAM; - } - if (dev_cap->bLength < LIBUSB_BT_CONTAINER_ID_SIZE) { - usbi_err(ctx, "short dev-cap descriptor read %d/%d", - dev_cap->bLength, LIBUSB_BT_CONTAINER_ID_SIZE); - return LIBUSB_ERROR_IO; - } - - _container_id = malloc(sizeof(*_container_id)); - if (!_container_id) - return LIBUSB_ERROR_NO_MEM; - - usbi_parse_descriptor((unsigned char *)dev_cap, "bbbbu", - _container_id, host_endian); - - *container_id = _container_id; - return LIBUSB_SUCCESS; -} - -/** \ingroup libusb_desc - * Free a Container ID descriptor obtained from - * libusb_get_container_id_descriptor(). - * It is safe to call this function with a NULL container_id parameter, - * in which case the function simply returns. - * - * \param container_id the Container ID descriptor to free - */ -void API_EXPORTED libusb_free_container_id_descriptor( - struct libusb_container_id_descriptor *container_id) -{ - free(container_id); -} - -/** \ingroup libusb_desc - * Retrieve a string descriptor in C style ASCII. - * - * Wrapper around libusb_get_string_descriptor(). Uses the first language - * supported by the device. - * - * \param dev_handle a device handle - * \param desc_index the index of the descriptor to retrieve - * \param data output buffer for ASCII string descriptor - * \param length size of data buffer - * \returns number of bytes returned in data, or LIBUSB_ERROR code on failure - */ -int API_EXPORTED libusb_get_string_descriptor_ascii(libusb_device_handle *dev_handle, - uint8_t desc_index, unsigned char *data, int length) -{ - unsigned char tbuf[255]; /* Some devices choke on size > 255 */ - int r, si, di; - uint16_t langid; - - /* Asking for the zero'th index is special - it returns a string - * descriptor that contains all the language IDs supported by the - * device. Typically there aren't many - often only one. Language - * IDs are 16 bit numbers, and they start at the third byte in the - * descriptor. There's also no point in trying to read descriptor 0 - * with this function. See USB 2.0 specification section 9.6.7 for - * more information. - */ - - if (desc_index == 0) - return LIBUSB_ERROR_INVALID_PARAM; - - r = libusb_get_string_descriptor(dev_handle, 0, 0, tbuf, sizeof(tbuf)); - if (r < 0) - return r; - - if (r < 4) - return LIBUSB_ERROR_IO; - - langid = (uint16_t)(tbuf[2] | (tbuf[3] << 8)); - - r = libusb_get_string_descriptor(dev_handle, desc_index, langid, tbuf, - sizeof(tbuf)); - if (r < 0) - return r; - - if (tbuf[1] != LIBUSB_DT_STRING) - return LIBUSB_ERROR_IO; - - if (tbuf[0] > r) - return LIBUSB_ERROR_IO; - - di = 0; - for (si = 2; si < tbuf[0]; si += 2) { - if (di >= (length - 1)) - break; - - if ((tbuf[si] & 0x80) || (tbuf[si + 1])) /* non-ASCII */ - data[di++] = '?'; - else - data[di++] = tbuf[si]; - } - - data[di] = 0; - return di; -} diff --git a/c8_libusb/src/hotplug.c b/c8_libusb/src/hotplug.c deleted file mode 100644 index ea09c77..0000000 --- a/c8_libusb/src/hotplug.c +++ /dev/null @@ -1,373 +0,0 @@ -/* -*- Mode: C; indent-tabs-mode:t ; c-basic-offset:8 -*- */ -/* - * Hotplug functions for src - * Copyright © 2012-2013 Nathan Hjelm - * Copyright © 2012-2013 Peter Stuge - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include "libusb_config.h" - -#include -#include -#include -#include -#ifdef HAVE_SYS_TYPES_H -#include -#endif -#include - -#include "libusbi.h" -#include "hotplug.h" - -/** - * @defgroup libusb_hotplug Device hotplug event notification - * This page details how to use the src hotplug interface, where available. - * - * Be mindful that not all platforms currently implement hotplug notification and - * that you should first call on \ref libusb_has_capability() with parameter - * \ref LIBUSB_CAP_HAS_HOTPLUG to confirm that hotplug support is available. - * - * \page libusb_hotplug Device hotplug event notification - * - * \section hotplug_intro Introduction - * - * Version 1.0.16, \ref LIBUSB_API_VERSION >= 0x01000102, has added support - * for hotplug events on some platforms (you should test if your platform - * supports hotplug notification by calling \ref libusb_has_capability() with - * parameter \ref LIBUSB_CAP_HAS_HOTPLUG). - * - * This interface allows you to request notification for the arrival and departure - * of matching USB devices. - * - * To receive hotplug notification you register a callback by calling - * \ref libusb_hotplug_register_callback(). This function will optionally return - * a callback handle that can be passed to \ref libusb_hotplug_deregister_callback(). - * - * A callback function must return an int (0 or 1) indicating whether the callback is - * expecting additional events. Returning 0 will rearm the callback and 1 will cause - * the callback to be deregistered. Note that when callbacks are called from - * libusb_hotplug_register_callback() because of the \ref LIBUSB_HOTPLUG_ENUMERATE - * flag, the callback return value is ignored, iow you cannot cause a callback - * to be deregistered by returning 1 when it is called from - * libusb_hotplug_register_callback(). - * - * Callbacks for a particular context are automatically deregistered by libusb_exit(). - * - * As of 1.0.16 there are two supported hotplug events: - * - LIBUSB_HOTPLUG_EVENT_DEVICE_ARRIVED: A device has arrived and is ready to use - * - LIBUSB_HOTPLUG_EVENT_DEVICE_LEFT: A device has left and is no longer available - * - * A hotplug event can listen for either or both of these events. - * - * Note: If you receive notification that a device has left and you have any - * a libusb_device_handles for the device it is up to you to call libusb_close() - * on each device handle to free up any remaining resources associated with the device. - * Once a device has left any libusb_device_handle associated with the device - * are invalid and will remain so even if the device comes back. - * - * When handling a LIBUSB_HOTPLUG_EVENT_DEVICE_ARRIVED event it is considered - * safe to call any src function that takes a libusb_device. It also safe to - * open a device and submit asynchronous transfers. However, most other functions - * that take a libusb_device_handle are not safe to call. Examples of such - * functions are any of the \ref libusb_syncio "synchronous API" functions or the blocking - * functions that retrieve various \ref libusb_desc "USB descriptors". These functions must - * be used outside of the context of the hotplug callback. - * - * When handling a LIBUSB_HOTPLUG_EVENT_DEVICE_LEFT event the only safe function - * is libusb_get_device_descriptor(). - * - * The following code provides an example of the usage of the hotplug interface: -\code -#include -#include -#include -#include - -static int count = 0; - -int hotplug_callback(struct libusb_context *ctx, struct libusb_device *dev, - libusb_hotplug_event event, void *user_data) { - static libusb_device_handle *dev_handle = NULL; - struct libusb_device_descriptor desc; - int rc; - - (void)libusb_get_device_descriptor(dev, &desc); - - if (LIBUSB_HOTPLUG_EVENT_DEVICE_ARRIVED == event) { - rc = libusb_open(dev, &dev_handle); - if (LIBUSB_SUCCESS != rc) { - printf("Could not open USB device\n"); - } - } else if (LIBUSB_HOTPLUG_EVENT_DEVICE_LEFT == event) { - if (dev_handle) { - libusb_close(dev_handle); - dev_handle = NULL; - } - } else { - printf("Unhandled event %d\n", event); - } - count++; - - return 0; -} - -int main (void) { - libusb_hotplug_callback_handle callback_handle; - int rc; - - libusb_init(NULL); - - rc = libusb_hotplug_register_callback(NULL, LIBUSB_HOTPLUG_EVENT_DEVICE_ARRIVED | - LIBUSB_HOTPLUG_EVENT_DEVICE_LEFT, 0, 0x045a, 0x5005, - LIBUSB_HOTPLUG_MATCH_ANY, hotplug_callback, NULL, - &callback_handle); - if (LIBUSB_SUCCESS != rc) { - printf("Error creating a hotplug callback\n"); - libusb_exit(NULL); - return EXIT_FAILURE; - } - - while (count < 2) { - libusb_handle_events_completed(NULL, NULL); - nanosleep(&(struct timespec){0, 10000000UL}, NULL); - } - - libusb_hotplug_deregister_callback(NULL, callback_handle); - libusb_exit(NULL); - - return 0; -} -\endcode - */ - -static int usbi_hotplug_match_cb(struct libusb_context *ctx, - struct libusb_device *dev, libusb_hotplug_event event, - struct libusb_hotplug_callback *hotplug_cb) -{ - if (!(hotplug_cb->flags & event)) { - return 0; - } - - if ((hotplug_cb->flags & USBI_HOTPLUG_VENDOR_ID_VALID) && - hotplug_cb->vendor_id != dev->device_descriptor.idVendor) { - return 0; - } - - if ((hotplug_cb->flags & USBI_HOTPLUG_PRODUCT_ID_VALID) && - hotplug_cb->product_id != dev->device_descriptor.idProduct) { - return 0; - } - - if ((hotplug_cb->flags & USBI_HOTPLUG_DEV_CLASS_VALID) && - hotplug_cb->dev_class != dev->device_descriptor.bDeviceClass) { - return 0; - } - - return hotplug_cb->cb(ctx, dev, event, hotplug_cb->user_data); -} - -void usbi_hotplug_match(struct libusb_context *ctx, struct libusb_device *dev, - libusb_hotplug_event event) -{ - struct libusb_hotplug_callback *hotplug_cb, *next; - int ret; - - usbi_mutex_lock(&ctx->hotplug_cbs_lock); - - list_for_each_entry_safe(hotplug_cb, next, &ctx->hotplug_cbs, list, struct libusb_hotplug_callback) { - if (hotplug_cb->flags & USBI_HOTPLUG_NEEDS_FREE) { - /* process deregistration in usbi_hotplug_deregister() */ - continue; - } - - usbi_mutex_unlock(&ctx->hotplug_cbs_lock); - ret = usbi_hotplug_match_cb(ctx, dev, event, hotplug_cb); - usbi_mutex_lock(&ctx->hotplug_cbs_lock); - - if (ret) { - list_del(&hotplug_cb->list); - free(hotplug_cb); - } - } - - usbi_mutex_unlock(&ctx->hotplug_cbs_lock); -} - -void usbi_hotplug_notification(struct libusb_context *ctx, struct libusb_device *dev, - libusb_hotplug_event event) -{ - int pending_events; - struct libusb_hotplug_message *message = calloc(1, sizeof(*message)); - - if (!message) { - usbi_err(ctx, "error allocating hotplug message"); - return; - } - - message->event = event; - message->device = dev; - - /* Take the event data lock and add this message to the list. - * Only signal an event if there are no prior pending events. */ - usbi_mutex_lock(&ctx->event_data_lock); - pending_events = usbi_pending_events(ctx); - list_add_tail(&message->list, &ctx->hotplug_msgs); - if (!pending_events) - usbi_signal_event(ctx); - usbi_mutex_unlock(&ctx->event_data_lock); -} - -int API_EXPORTED libusb_hotplug_register_callback(libusb_context *ctx, - libusb_hotplug_event events, libusb_hotplug_flag flags, - int vendor_id, int product_id, int dev_class, - libusb_hotplug_callback_fn cb_fn, void *user_data, - libusb_hotplug_callback_handle *callback_handle) -{ - struct libusb_hotplug_callback *new_callback; - - /* check for sane values */ - if ((!events || (~(LIBUSB_HOTPLUG_EVENT_DEVICE_ARRIVED | LIBUSB_HOTPLUG_EVENT_DEVICE_LEFT) & events)) || - (flags && (~LIBUSB_HOTPLUG_ENUMERATE & flags)) || - (LIBUSB_HOTPLUG_MATCH_ANY != vendor_id && (~0xffff & vendor_id)) || - (LIBUSB_HOTPLUG_MATCH_ANY != product_id && (~0xffff & product_id)) || - (LIBUSB_HOTPLUG_MATCH_ANY != dev_class && (~0xff & dev_class)) || - !cb_fn) { - return LIBUSB_ERROR_INVALID_PARAM; - } - - /* check for hotplug support */ - if (!libusb_has_capability(LIBUSB_CAP_HAS_HOTPLUG)) { - return LIBUSB_ERROR_NOT_SUPPORTED; - } - - USBI_GET_CONTEXT(ctx); - - new_callback = calloc(1, sizeof(*new_callback)); - if (!new_callback) { - return LIBUSB_ERROR_NO_MEM; - } - - new_callback->flags = (uint8_t)events; - if (LIBUSB_HOTPLUG_MATCH_ANY != vendor_id) { - new_callback->flags |= USBI_HOTPLUG_VENDOR_ID_VALID; - new_callback->vendor_id = (uint16_t)vendor_id; - } - if (LIBUSB_HOTPLUG_MATCH_ANY != product_id) { - new_callback->flags |= USBI_HOTPLUG_PRODUCT_ID_VALID; - new_callback->product_id = (uint16_t)product_id; - } - if (LIBUSB_HOTPLUG_MATCH_ANY != dev_class) { - new_callback->flags |= USBI_HOTPLUG_DEV_CLASS_VALID; - new_callback->dev_class = (uint8_t)dev_class; - } - new_callback->cb = cb_fn; - new_callback->user_data = user_data; - - usbi_mutex_lock(&ctx->hotplug_cbs_lock); - - /* protect the handle by the context hotplug lock */ - new_callback->handle = ctx->next_hotplug_cb_handle++; - - /* handle the unlikely case of overflow */ - if (ctx->next_hotplug_cb_handle < 0) - ctx->next_hotplug_cb_handle = 1; - - list_add(&new_callback->list, &ctx->hotplug_cbs); - - usbi_mutex_unlock(&ctx->hotplug_cbs_lock); - - usbi_dbg("new hotplug cb %p with handle %d", new_callback, new_callback->handle); - - if ((flags & LIBUSB_HOTPLUG_ENUMERATE) && (events & LIBUSB_HOTPLUG_EVENT_DEVICE_ARRIVED)) { - ssize_t i, len; - struct libusb_device **devs; - - len = libusb_get_device_list(ctx, &devs); - if (len < 0) { - libusb_hotplug_deregister_callback(ctx, - new_callback->handle); - return (int)len; - } - - for (i = 0; i < len; i++) { - usbi_hotplug_match_cb(ctx, devs[i], - LIBUSB_HOTPLUG_EVENT_DEVICE_ARRIVED, - new_callback); - } - - libusb_free_device_list(devs, 1); - } - - - if (callback_handle) - *callback_handle = new_callback->handle; - - return LIBUSB_SUCCESS; -} - -void API_EXPORTED libusb_hotplug_deregister_callback(struct libusb_context *ctx, - libusb_hotplug_callback_handle callback_handle) -{ - struct libusb_hotplug_callback *hotplug_cb; - int deregistered = 0; - - /* check for hotplug support */ - if (!libusb_has_capability(LIBUSB_CAP_HAS_HOTPLUG)) { - return; - } - - USBI_GET_CONTEXT(ctx); - - usbi_dbg("deregister hotplug cb %d", callback_handle); - - usbi_mutex_lock(&ctx->hotplug_cbs_lock); - list_for_each_entry(hotplug_cb, &ctx->hotplug_cbs, list, struct libusb_hotplug_callback) { - if (callback_handle == hotplug_cb->handle) { - /* Mark this callback for deregistration */ - hotplug_cb->flags |= USBI_HOTPLUG_NEEDS_FREE; - deregistered = 1; - } - } - usbi_mutex_unlock(&ctx->hotplug_cbs_lock); - - if (deregistered) { - int pending_events; - - usbi_mutex_lock(&ctx->event_data_lock); - pending_events = usbi_pending_events(ctx); - ctx->event_flags |= USBI_EVENT_HOTPLUG_CB_DEREGISTERED; - if (!pending_events) - usbi_signal_event(ctx); - usbi_mutex_unlock(&ctx->event_data_lock); - } -} - -void usbi_hotplug_deregister(struct libusb_context *ctx, int forced) -{ - struct libusb_hotplug_callback *hotplug_cb, *next; - - usbi_mutex_lock(&ctx->hotplug_cbs_lock); - list_for_each_entry_safe(hotplug_cb, next, &ctx->hotplug_cbs, list, struct libusb_hotplug_callback) { - if (forced || (hotplug_cb->flags & USBI_HOTPLUG_NEEDS_FREE)) { - usbi_dbg("freeing hotplug cb %p with handle %d", hotplug_cb, - hotplug_cb->handle); - list_del(&hotplug_cb->list); - free(hotplug_cb); - } - } - usbi_mutex_unlock(&ctx->hotplug_cbs_lock); -} diff --git a/c8_libusb/src/hotplug.h b/c8_libusb/src/hotplug.h deleted file mode 100644 index 1dcf5ae..0000000 --- a/c8_libusb/src/hotplug.h +++ /dev/null @@ -1,99 +0,0 @@ -/* -*- Mode: C; indent-tabs-mode:t ; c-basic-offset:8 -*- */ -/* - * Hotplug support for src - * Copyright © 2012-2013 Nathan Hjelm - * Copyright © 2012-2013 Peter Stuge - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#ifndef USBI_HOTPLUG_H -#define USBI_HOTPLUG_H - -#include "libusbi.h" - -enum usbi_hotplug_flags { - /* This callback is interested in device arrivals */ - USBI_HOTPLUG_DEVICE_ARRIVED = LIBUSB_HOTPLUG_EVENT_DEVICE_ARRIVED, - - /* This callback is interested in device removals */ - USBI_HOTPLUG_DEVICE_LEFT = LIBUSB_HOTPLUG_EVENT_DEVICE_LEFT, - - /* IMPORTANT: The values for the below entries must start *after* - * the highest value of the above entries!!! - */ - - /* The vendor_id field is valid for matching */ - USBI_HOTPLUG_VENDOR_ID_VALID = (1U << 3), - - /* The product_id field is valid for matching */ - USBI_HOTPLUG_PRODUCT_ID_VALID = (1U << 4), - - /* The dev_class field is valid for matching */ - USBI_HOTPLUG_DEV_CLASS_VALID = (1U << 5), - - /* This callback has been unregistered and needs to be freed */ - USBI_HOTPLUG_NEEDS_FREE = (1U << 6), -}; - -/** \ingroup hotplug - * The hotplug callback structure. The user populates this structure with - * libusb_hotplug_prepare_callback() and then calls libusb_hotplug_register_callback() - * to receive notification of hotplug events. - */ -struct libusb_hotplug_callback { - /** Flags that control how this callback behaves */ - uint8_t flags; - - /** Vendor ID to match (if flags says this is valid) */ - uint16_t vendor_id; - - /** Product ID to match (if flags says this is valid) */ - uint16_t product_id; - - /** Device class to match (if flags says this is valid) */ - uint8_t dev_class; - - /** Callback function to invoke for matching event/device */ - libusb_hotplug_callback_fn cb; - - /** Handle for this callback (used to match on deregister) */ - libusb_hotplug_callback_handle handle; - - /** User data that will be passed to the callback function */ - void *user_data; - - /** List this callback is registered in (ctx->hotplug_cbs) */ - struct list_head list; -}; - -struct libusb_hotplug_message { - /** The hotplug event that occurred */ - libusb_hotplug_event event; - - /** The device for which this hotplug event occurred */ - struct libusb_device *device; - - /** List this message is contained in (ctx->hotplug_msgs) */ - struct list_head list; -}; - -void usbi_hotplug_deregister(struct libusb_context *ctx, int forced); -void usbi_hotplug_match(struct libusb_context *ctx, struct libusb_device *dev, - libusb_hotplug_event event); -void usbi_hotplug_notification(struct libusb_context *ctx, struct libusb_device *dev, - libusb_hotplug_event event); - -#endif diff --git a/c8_libusb/src/io.c b/c8_libusb/src/io.c deleted file mode 100644 index d09b95a..0000000 --- a/c8_libusb/src/io.c +++ /dev/null @@ -1,2866 +0,0 @@ -/* -*- Mode: C; indent-tabs-mode:t ; c-basic-offset:8 -*- */ -/* - * I/O functions for src - * Copyright © 2007-2009 Daniel Drake - * Copyright © 2001 Johannes Erdfelt - * Copyright © 2019 Nathan Hjelm - * Copyright © 2019 Google LLC. All rights reserved. - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include "libusb_config.h" - -#include -#include -#include -#include -#include -#include -#ifdef HAVE_SYS_TIME_H -#include -#endif -#ifdef USBI_TIMERFD_AVAILABLE -#include -#include -#endif - -#include "libusbi.h" -#include "hotplug.h" - -/** - * \page libusb_io Synchronous and asynchronous device I/O - * - * \section io_intro Introduction - * - * If you're using src in your application, you're probably wanting to - * perform I/O with devices - you want to perform USB data transfers. - * - * src offers two separate interfaces for device I/O. This page aims to - * introduce the two in order to help you decide which one is more suitable - * for your application. You can also choose to use both interfaces in your - * application by considering each transfer on a case-by-case basis. - * - * Once you have read through the following discussion, you should consult the - * detailed API documentation pages for the details: - * - \ref libusb_syncio - * - \ref libusb_asyncio - * - * \section theory Transfers at a logical level - * - * At a logical level, USB transfers typically happen in two parts. For - * example, when reading data from a endpoint: - * -# A request for data is sent to the device - * -# Some time later, the incoming data is received by the host - * - * or when writing data to an endpoint: - * - * -# The data is sent to the device - * -# Some time later, the host receives acknowledgement from the device that - * the data has been transferred. - * - * There may be an indefinite delay between the two steps. Consider a - * fictional USB input device with a button that the user can press. In order - * to determine when the button is pressed, you would likely submit a request - * to read data on a bulk or interrupt endpoint and wait for data to arrive. - * Data will arrive when the button is pressed by the user, which is - * potentially hours later. - * - * src offers both a synchronous and an asynchronous interface to performing - * USB transfers. The main difference is that the synchronous interface - * combines both steps indicated above into a single function call, whereas - * the asynchronous interface separates them. - * - * \section sync The synchronous interface - * - * The synchronous I/O interface allows you to perform a USB transfer with - * a single function call. When the function call returns, the transfer has - * completed and you can parse the results. - * - * If you have used the src-0.1 before, this I/O style will seem familar to - * you. src-0.1 only offered a synchronous interface. - * - * In our input device example, to read button presses you might write code - * in the following style: -\code -unsigned char data[4]; -int actual_length; -int r = libusb_bulk_transfer(dev_handle, LIBUSB_ENDPOINT_IN, data, sizeof(data), &actual_length, 0); -if (r == 0 && actual_length == sizeof(data)) { - // results of the transaction can now be found in the data buffer - // parse them here and report button press -} else { - error(); -} -\endcode - * - * The main advantage of this model is simplicity: you did everything with - * a single simple function call. - * - * However, this interface has its limitations. Your application will sleep - * inside libusb_bulk_transfer() until the transaction has completed. If it - * takes the user 3 hours to press the button, your application will be - * sleeping for that long. Execution will be tied up inside the library - - * the entire thread will be useless for that duration. - * - * Another issue is that by tieing up the thread with that single transaction - * there is no possibility of performing I/O with multiple endpoints and/or - * multiple devices simultaneously, unless you resort to creating one thread - * per transaction. - * - * Additionally, there is no opportunity to cancel the transfer after the - * request has been submitted. - * - * For details on how to use the synchronous API, see the - * \ref libusb_syncio "synchronous I/O API documentation" pages. - * - * \section async The asynchronous interface - * - * Asynchronous I/O is the most significant new feature in src-1.0. - * Although it is a more complex interface, it solves all the issues detailed - * above. - * - * Instead of providing which functions that block until the I/O has complete, - * src's asynchronous interface presents non-blocking functions which - * begin a transfer and then return immediately. Your application passes a - * callback function pointer to this non-blocking function, which src will - * call with the results of the transaction when it has completed. - * - * Transfers which have been submitted through the non-blocking functions - * can be cancelled with a separate function call. - * - * The non-blocking nature of this interface allows you to be simultaneously - * performing I/O to multiple endpoints on multiple devices, without having - * to use threads. - * - * This added flexibility does come with some complications though: - * - In the interest of being a lightweight library, src does not create - * threads and can only operate when your application is calling into it. Your - * application must call into src from it's main loop when events are ready - * to be handled, or you must use some other scheme to allow src to - * undertake whatever work needs to be done. - * - src also needs to be called into at certain fixed points in time in - * order to accurately handle transfer timeouts. - * - Memory handling becomes more complex. You cannot use stack memory unless - * the function with that stack is guaranteed not to return until the transfer - * callback has finished executing. - * - You generally lose some linearity from your code flow because submitting - * the transfer request is done in a separate function from where the transfer - * results are handled. This becomes particularly obvious when you want to - * submit a second transfer based on the results of an earlier transfer. - * - * Internally, src's synchronous interface is expressed in terms of function - * calls to the asynchronous interface. - * - * For details on how to use the asynchronous API, see the - * \ref libusb_asyncio "asynchronous I/O API" documentation pages. - */ - - -/** - * \page libusb_packetoverflow Packets and overflows - * - * \section packets Packet abstraction - * - * The USB specifications describe how data is transmitted in packets, with - * constraints on packet size defined by endpoint descriptors. The host must - * not send data payloads larger than the endpoint's maximum packet size. - * - * src and the underlying OS abstract out the packet concept, allowing you - * to request transfers of any size. Internally, the request will be divided - * up into correctly-sized packets. You do not have to be concerned with - * packet sizes, but there is one exception when considering overflows. - * - * \section overflow Bulk/interrupt transfer overflows - * - * When requesting data on a bulk endpoint, src requires you to supply a - * buffer and the maximum number of bytes of data that src can put in that - * buffer. However, the size of the buffer is not communicated to the device - - * the device is just asked to send any amount of data. - * - * There is no problem if the device sends an amount of data that is less than - * or equal to the buffer size. src reports this condition to you through - * the \ref libusb_transfer::actual_length "libusb_transfer.actual_length" - * field. - * - * Problems may occur if the device attempts to send more data than can fit in - * the buffer. src reports LIBUSB_TRANSFER_OVERFLOW for this condition but - * other behaviour is largely undefined: actual_length may or may not be - * accurate, the chunk of data that can fit in the buffer (before overflow) - * may or may not have been transferred. - * - * Overflows are nasty, but can be avoided. Even though you were told to - * ignore packets above, think about the lower level details: each transfer is - * split into packets (typically small, with a maximum size of 512 bytes). - * Overflows can only happen if the final packet in an incoming data transfer - * is smaller than the actual packet that the device wants to transfer. - * Therefore, you will never see an overflow if your transfer buffer size is a - * multiple of the endpoint's packet size: the final packet will either - * fill up completely or will be only partially filled. - */ - -/** - * @defgroup libusb_asyncio Asynchronous device I/O - * - * This page details src's asynchronous (non-blocking) API for USB device - * I/O. This interface is very powerful but is also quite complex - you will - * need to read this page carefully to understand the necessary considerations - * and issues surrounding use of this interface. Simplistic applications - * may wish to consider the \ref libusb_syncio "synchronous I/O API" instead. - * - * The asynchronous interface is built around the idea of separating transfer - * submission and handling of transfer completion (the synchronous model - * combines both of these into one). There may be a long delay between - * submission and completion, however the asynchronous submission function - * is non-blocking so will return control to your application during that - * potentially long delay. - * - * \section asyncabstraction Transfer abstraction - * - * For the asynchronous I/O, src implements the concept of a generic - * transfer entity for all types of I/O (control, bulk, interrupt, - * isochronous). The generic transfer object must be treated slightly - * differently depending on which type of I/O you are performing with it. - * - * This is represented by the public libusb_transfer structure type. - * - * \section asynctrf Asynchronous transfers - * - * We can view asynchronous I/O as a 5 step process: - * -# Allocation: allocate a libusb_transfer - * -# Filling: populate the libusb_transfer instance with information - * about the transfer you wish to perform - * -# Submission: ask src to submit the transfer - * -# Completion handling: examine transfer results in the - * libusb_transfer structure - * -# Deallocation: clean up resources - * - * - * \subsection asyncalloc Allocation - * - * This step involves allocating memory for a USB transfer. This is the - * generic transfer object mentioned above. At this stage, the transfer - * is "blank" with no details about what type of I/O it will be used for. - * - * Allocation is done with the libusb_alloc_transfer() function. You must use - * this function rather than allocating your own transfers. - * - * \subsection asyncfill Filling - * - * This step is where you take a previously allocated transfer and fill it - * with information to determine the message type and direction, data buffer, - * callback function, etc. - * - * You can either fill the required fields yourself or you can use the - * helper functions: libusb_fill_control_transfer(), libusb_fill_bulk_transfer() - * and libusb_fill_interrupt_transfer(). - * - * \subsection asyncsubmit Submission - * - * When you have allocated a transfer and filled it, you can submit it using - * libusb_submit_transfer(). This function returns immediately but can be - * regarded as firing off the I/O request in the background. - * - * \subsection asynccomplete Completion handling - * - * After a transfer has been submitted, one of four things can happen to it: - * - * - The transfer completes (i.e. some data was transferred) - * - The transfer has a timeout and the timeout expires before all data is - * transferred - * - The transfer fails due to an error - * - The transfer is cancelled - * - * Each of these will cause the user-specified transfer callback function to - * be invoked. It is up to the callback function to determine which of the - * above actually happened and to act accordingly. - * - * The user-specified callback is passed a pointer to the libusb_transfer - * structure which was used to setup and submit the transfer. At completion - * time, src has populated this structure with results of the transfer: - * success or failure reason, number of bytes of data transferred, etc. See - * the libusb_transfer structure documentation for more information. - * - * Important Note: The user-specified callback is called from an event - * handling context. It is therefore important that no calls are made into - * src that will attempt to perform any event handling. Examples of such - * functions are any listed in the \ref libusb_syncio "synchronous API" and any of - * the blocking functions that retrieve \ref libusb_desc "USB descriptors". - * - * \subsection Deallocation - * - * When a transfer has completed (i.e. the callback function has been invoked), - * you are advised to free the transfer (unless you wish to resubmit it, see - * below). Transfers are deallocated with libusb_free_transfer(). - * - * It is undefined behaviour to free a transfer which has not completed. - * - * \section asyncresubmit Resubmission - * - * You may be wondering why allocation, filling, and submission are all - * separated above where they could reasonably be combined into a single - * operation. - * - * The reason for separation is to allow you to resubmit transfers without - * having to allocate new ones every time. This is especially useful for - * common situations dealing with interrupt endpoints - you allocate one - * transfer, fill and submit it, and when it returns with results you just - * resubmit it for the next interrupt. - * - * \section asynccancel Cancellation - * - * Another advantage of using the asynchronous interface is that you have - * the ability to cancel transfers which have not yet completed. This is - * done by calling the libusb_cancel_transfer() function. - * - * libusb_cancel_transfer() is asynchronous/non-blocking in itself. When the - * cancellation actually completes, the transfer's callback function will - * be invoked, and the callback function should check the transfer status to - * determine that it was cancelled. - * - * Freeing the transfer after it has been cancelled but before cancellation - * has completed will result in undefined behaviour. - * - * When a transfer is cancelled, some of the data may have been transferred. - * src will communicate this to you in the transfer callback. Do not assume - * that no data was transferred. - * - * \section bulk_overflows Overflows on device-to-host bulk/interrupt endpoints - * - * If your device does not have predictable transfer sizes (or it misbehaves), - * your application may submit a request for data on an IN endpoint which is - * smaller than the data that the device wishes to send. In some circumstances - * this will cause an overflow, which is a nasty condition to deal with. See - * the \ref libusb_packetoverflow page for discussion. - * - * \section asyncctrl Considerations for control transfers - * - * The libusb_transfer structure is generic and hence does not - * include specific fields for the control-specific setup packet structure. - * - * In order to perform a control transfer, you must place the 8-byte setup - * packet at the start of the data buffer. To simplify this, you could - * cast the buffer pointer to type struct libusb_control_setup, or you can - * use the helper function libusb_fill_control_setup(). - * - * The wLength field placed in the setup packet must be the length you would - * expect to be sent in the setup packet: the length of the payload that - * follows (or the expected maximum number of bytes to receive). However, - * the length field of the libusb_transfer object must be the length of - * the data buffer - i.e. it should be wLength plus the size of - * the setup packet (LIBUSB_CONTROL_SETUP_SIZE). - * - * If you use the helper functions, this is simplified for you: - * -# Allocate a buffer of size LIBUSB_CONTROL_SETUP_SIZE plus the size of the - * data you are sending/requesting. - * -# Call libusb_fill_control_setup() on the data buffer, using the transfer - * request size as the wLength value (i.e. do not include the extra space you - * allocated for the control setup). - * -# If this is a host-to-device transfer, place the data to be transferred - * in the data buffer, starting at offset LIBUSB_CONTROL_SETUP_SIZE. - * -# Call libusb_fill_control_transfer() to associate the data buffer with - * the transfer (and to set the remaining details such as callback and timeout). - * - Note that there is no parameter to set the length field of the transfer. - * The length is automatically inferred from the wLength field of the setup - * packet. - * -# Submit the transfer. - * - * The multi-byte control setup fields (wValue, wIndex and wLength) must - * be given in little-endian byte order (the endianness of the USB bus). - * Endianness conversion is transparently handled by - * libusb_fill_control_setup() which is documented to accept host-endian - * values. - * - * Further considerations are needed when handling transfer completion in - * your callback function: - * - As you might expect, the setup packet will still be sitting at the start - * of the data buffer. - * - If this was a device-to-host transfer, the received data will be sitting - * at offset LIBUSB_CONTROL_SETUP_SIZE into the buffer. - * - The actual_length field of the transfer structure is relative to the - * wLength of the setup packet, rather than the size of the data buffer. So, - * if your wLength was 4, your transfer's length was 12, then you - * should expect an actual_length of 4 to indicate that the data was - * transferred in entirity. - * - * To simplify parsing of setup packets and obtaining the data from the - * correct offset, you may wish to use the libusb_control_transfer_get_data() - * and libusb_control_transfer_get_setup() functions within your transfer - * callback. - * - * Even though control endpoints do not halt, a completed control transfer - * may have a LIBUSB_TRANSFER_STALL status code. This indicates the control - * request was not supported. - * - * \section asyncintr Considerations for interrupt transfers - * - * All interrupt transfers are performed using the polling interval presented - * by the bInterval value of the endpoint descriptor. - * - * \section asynciso Considerations for isochronous transfers - * - * Isochronous transfers are more complicated than transfers to - * non-isochronous endpoints. - * - * To perform I/O to an isochronous endpoint, allocate the transfer by calling - * libusb_alloc_transfer() with an appropriate number of isochronous packets. - * - * During filling, set \ref libusb_transfer::type "type" to - * \ref libusb_transfer_type::LIBUSB_TRANSFER_TYPE_ISOCHRONOUS - * "LIBUSB_TRANSFER_TYPE_ISOCHRONOUS", and set - * \ref libusb_transfer::num_iso_packets "num_iso_packets" to a value less than - * or equal to the number of packets you requested during allocation. - * libusb_alloc_transfer() does not set either of these fields for you, given - * that you might not even use the transfer on an isochronous endpoint. - * - * Next, populate the length field for the first num_iso_packets entries in - * the \ref libusb_transfer::iso_packet_desc "iso_packet_desc" array. Section - * 5.6.3 of the USB2 specifications describe how the maximum isochronous - * packet length is determined by the wMaxPacketSize field in the endpoint - * descriptor. - * Two functions can help you here: - * - * - libusb_get_max_iso_packet_size() is an easy way to determine the max - * packet size for an isochronous endpoint. Note that the maximum packet - * size is actually the maximum number of bytes that can be transmitted in - * a single microframe, therefore this function multiplies the maximum number - * of bytes per transaction by the number of transaction opportunities per - * microframe. - * - libusb_set_iso_packet_lengths() assigns the same length to all packets - * within a transfer, which is usually what you want. - * - * For outgoing transfers, you'll obviously fill the buffer and populate the - * packet descriptors in hope that all the data gets transferred. For incoming - * transfers, you must ensure the buffer has sufficient capacity for - * the situation where all packets transfer the full amount of requested data. - * - * Completion handling requires some extra consideration. The - * \ref libusb_transfer::actual_length "actual_length" field of the transfer - * is meaningless and should not be examined; instead you must refer to the - * \ref libusb_iso_packet_descriptor::actual_length "actual_length" field of - * each individual packet. - * - * The \ref libusb_transfer::status "status" field of the transfer is also a - * little misleading: - * - If the packets were submitted and the isochronous data microframes - * completed normally, status will have value - * \ref libusb_transfer_status::LIBUSB_TRANSFER_COMPLETED - * "LIBUSB_TRANSFER_COMPLETED". Note that bus errors and software-incurred - * delays are not counted as transfer errors; the transfer.status field may - * indicate COMPLETED even if some or all of the packets failed. Refer to - * the \ref libusb_iso_packet_descriptor::status "status" field of each - * individual packet to determine packet failures. - * - The status field will have value - * \ref libusb_transfer_status::LIBUSB_TRANSFER_ERROR - * "LIBUSB_TRANSFER_ERROR" only when serious errors were encountered. - * - Other transfer status codes occur with normal behaviour. - * - * The data for each packet will be found at an offset into the buffer that - * can be calculated as if each prior packet completed in full. The - * libusb_get_iso_packet_buffer() and libusb_get_iso_packet_buffer_simple() - * functions may help you here. - * - * Note: Some operating systems (e.g. Linux) may impose limits on the - * length of individual isochronous packets and/or the total length of the - * isochronous transfer. Such limits can be difficult for src to detect, - * so the library will simply try and submit the transfer as set up by you. - * If the transfer fails to submit because it is too large, - * libusb_submit_transfer() will return - * \ref libusb_error::LIBUSB_ERROR_INVALID_PARAM "LIBUSB_ERROR_INVALID_PARAM". - * - * \section asyncmem Memory caveats - * - * In most circumstances, it is not safe to use stack memory for transfer - * buffers. This is because the function that fired off the asynchronous - * transfer may return before src has finished using the buffer, and when - * the function returns it's stack gets destroyed. This is true for both - * host-to-device and device-to-host transfers. - * - * The only case in which it is safe to use stack memory is where you can - * guarantee that the function owning the stack space for the buffer does not - * return until after the transfer's callback function has completed. In every - * other case, you need to use heap memory instead. - * - * \section asyncflags Fine control - * - * Through using this asynchronous interface, you may find yourself repeating - * a few simple operations many times. You can apply a bitwise OR of certain - * flags to a transfer to simplify certain things: - * - \ref libusb_transfer_flags::LIBUSB_TRANSFER_SHORT_NOT_OK - * "LIBUSB_TRANSFER_SHORT_NOT_OK" results in transfers which transferred - * less than the requested amount of data being marked with status - * \ref libusb_transfer_status::LIBUSB_TRANSFER_ERROR "LIBUSB_TRANSFER_ERROR" - * (they would normally be regarded as COMPLETED) - * - \ref libusb_transfer_flags::LIBUSB_TRANSFER_FREE_BUFFER - * "LIBUSB_TRANSFER_FREE_BUFFER" allows you to ask src to free the transfer - * buffer when freeing the transfer. - * - \ref libusb_transfer_flags::LIBUSB_TRANSFER_FREE_TRANSFER - * "LIBUSB_TRANSFER_FREE_TRANSFER" causes src to automatically free the - * transfer after the transfer callback returns. - * - * \section asyncevent Event handling - * - * An asynchronous model requires that src perform work at various - * points in time - namely processing the results of previously-submitted - * transfers and invoking the user-supplied callback function. - * - * This gives rise to the libusb_handle_events() function which your - * application must call into when src has work do to. This gives src - * the opportunity to reap pending transfers, invoke callbacks, etc. - * - * There are 2 different approaches to dealing with libusb_handle_events: - * - * -# Repeatedly call libusb_handle_events() in blocking mode from a dedicated - * thread. - * -# Integrate src with your application's main event loop. src - * exposes a set of file descriptors which allow you to do this. - * - * The first approach has the big advantage that it will also work on Windows - * were src' poll API for select / poll integration is not available. So - * if you want to support Windows and use the async API, you must use this - * approach, see the \ref eventthread "Using an event handling thread" section - * below for details. - * - * If you prefer a single threaded approach with a single central event loop, - * see the \ref libusb_poll "polling and timing" section for how to integrate src - * into your application's main event loop. - * - * \section eventthread Using an event handling thread - * - * Lets begin with stating the obvious: If you're going to use a separate - * thread for src event handling, your callback functions MUST be - * threadsafe. - * - * Other then that doing event handling from a separate thread, is mostly - * simple. You can use an event thread function as follows: -\code -void *event_thread_func(void *ctx) -{ - while (event_thread_run) - libusb_handle_events(ctx); - - return NULL; -} -\endcode - * - * There is one caveat though, stopping this thread requires setting the - * event_thread_run variable to 0, and after that libusb_handle_events() needs - * to return control to event_thread_func. But unless some event happens, - * libusb_handle_events() will not return. - * - * There are 2 different ways of dealing with this, depending on if your - * application uses src' \ref libusb_hotplug "hotplug" support or not. - * - * Applications which do not use hotplug support, should not start the event - * thread until after their first call to libusb_open(), and should stop the - * thread when closing the last open device as follows: -\code -void my_close_handle(libusb_device_handle *dev_handle) -{ - if (open_devs == 1) - event_thread_run = 0; - - libusb_close(dev_handle); // This wakes up libusb_handle_events() - - if (open_devs == 1) - pthread_join(event_thread); - - open_devs--; -} -\endcode - * - * Applications using hotplug support should start the thread at program init, - * after having successfully called libusb_hotplug_register_callback(), and - * should stop the thread at program exit as follows: -\code -void my_libusb_exit(void) -{ - event_thread_run = 0; - libusb_hotplug_deregister_callback(ctx, hotplug_cb_handle); // This wakes up libusb_handle_events() - pthread_join(event_thread); - libusb_exit(ctx); -} -\endcode - */ - -/** - * @defgroup libusb_poll Polling and timing - * - * This page documents src's functions for polling events and timing. - * These functions are only necessary for users of the - * \ref libusb_asyncio "asynchronous API". If you are only using the simpler - * \ref libusb_syncio "synchronous API" then you do not need to ever call these - * functions. - * - * The justification for the functionality described here has already been - * discussed in the \ref asyncevent "event handling" section of the - * asynchronous API documentation. In summary, src does not create internal - * threads for event processing and hence relies on your application calling - * into src at certain points in time so that pending events can be handled. - * - * Your main loop is probably already calling poll() or select() or a - * variant on a set of file descriptors for other event sources (e.g. keyboard - * button presses, mouse movements, network sockets, etc). You then add - * src's file descriptors to your poll()/select() calls, and when activity - * is detected on such descriptors you know it is time to call - * libusb_handle_events(). - * - * There is one final event handling complication. src supports - * asynchronous transfers which time out after a specified time period. - * - * On some platforms a timerfd is used, so the timeout handling is just another - * fd, on other platforms this requires that src is called into at or after - * the timeout to handle it. So, in addition to considering src's file - * descriptors in your main event loop, you must also consider that src - * sometimes needs to be called into at fixed points in time even when there - * is no file descriptor activity, see \ref polltime details. - * - * In order to know precisely when src needs to be called into, src - * offers you a set of pollable file descriptors and information about when - * the next timeout expires. - * - * If you are using the asynchronous I/O API, you must take one of the two - * following options, otherwise your I/O will not complete. - * - * \section pollsimple The simple option - * - * If your application revolves solely around src and does not need to - * handle other event sources, you can have a program structure as follows: -\code -// initialize src -// find and open device -// maybe fire off some initial async I/O - -while (user_has_not_requested_exit) - libusb_handle_events(ctx); - -// clean up and exit -\endcode - * - * With such a simple main loop, you do not have to worry about managing - * sets of file descriptors or handling timeouts. libusb_handle_events() will - * handle those details internally. - * - * \section libusb_pollmain The more advanced option - * - * \note This functionality is currently only available on Unix-like platforms. - * On Windows, libusb_get_pollfds() simply returns NULL. Applications which - * want to support Windows are advised to use an \ref eventthread - * "event handling thread" instead. - * - * In more advanced applications, you will already have a main loop which - * is monitoring other event sources: network sockets, X11 events, mouse - * movements, etc. Through exposing a set of file descriptors, src is - * designed to cleanly integrate into such main loops. - * - * In addition to polling file descriptors for the other event sources, you - * take a set of file descriptors from src and monitor those too. When you - * detect activity on src's file descriptors, you call - * libusb_handle_events_timeout() in non-blocking mode. - * - * What's more, src may also need to handle events at specific moments in - * time. No file descriptor activity is generated at these times, so your - * own application needs to be continually aware of when the next one of these - * moments occurs (through calling libusb_get_next_timeout()), and then it - * needs to call libusb_handle_events_timeout() in non-blocking mode when - * these moments occur. This means that you need to adjust your - * poll()/select() timeout accordingly. - * - * src provides you with a set of file descriptors to poll and expects you - * to poll all of them, treating them as a single entity. The meaning of each - * file descriptor in the set is an internal implementation detail, - * platform-dependent and may vary from release to release. Don't try and - * interpret the meaning of the file descriptors, just do as src indicates, - * polling all of them at once. - * - * In pseudo-code, you want something that looks like: -\code -// initialise src - -libusb_get_pollfds(ctx) -while (user has not requested application exit) { - libusb_get_next_timeout(ctx); - poll(on src file descriptors plus any other event sources of interest, - using a timeout no larger than the value src just suggested) - if (poll() indicated activity on src file descriptors) - libusb_handle_events_timeout(ctx, &zero_tv); - if (time has elapsed to or beyond the src timeout) - libusb_handle_events_timeout(ctx, &zero_tv); - // handle events from other sources here -} - -// clean up and exit -\endcode - * - * \subsection polltime Notes on time-based events - * - * The above complication with having to track time and call into src at - * specific moments is a bit of a headache. For maximum compatibility, you do - * need to write your main loop as above, but you may decide that you can - * restrict the supported platforms of your application and get away with - * a more simplistic scheme. - * - * These time-based event complications are \b not required on the following - * platforms: - * - Darwin - * - Linux, provided that the following version requirements are satisfied: - * - Linux v2.6.27 or newer, compiled with timerfd support - * - glibc v2.9 or newer - * - src v1.0.5 or newer - * - * Under these configurations, libusb_get_next_timeout() will \em always return - * 0, so your main loop can be simplified to: -\code -// initialise src - -libusb_get_pollfds(ctx) -while (user has not requested application exit) { - poll(on src file descriptors plus any other event sources of interest, - using any timeout that you like) - if (poll() indicated activity on src file descriptors) - libusb_handle_events_timeout(ctx, &zero_tv); - // handle events from other sources here -} - -// clean up and exit -\endcode - * - * Do remember that if you simplify your main loop to the above, you will - * lose compatibility with some platforms (including legacy Linux platforms, - * and any future platforms supported by src which may have time-based - * event requirements). The resultant problems will likely appear as - * strange bugs in your application. - * - * You can use the libusb_pollfds_handle_timeouts() function to do a runtime - * check to see if it is safe to ignore the time-based event complications. - * If your application has taken the shortcut of ignoring src's next timeout - * in your main loop, then you are advised to check the return value of - * libusb_pollfds_handle_timeouts() during application startup, and to abort - * if the platform does suffer from these timing complications. - * - * \subsection fdsetchange Changes in the file descriptor set - * - * The set of file descriptors that src uses as event sources may change - * during the life of your application. Rather than having to repeatedly - * call libusb_get_pollfds(), you can set up notification functions for when - * the file descriptor set changes using libusb_set_pollfd_notifiers(). - * - * \subsection mtissues Multi-threaded considerations - * - * Unfortunately, the situation is complicated further when multiple threads - * come into play. If two threads are monitoring the same file descriptors, - * the fact that only one thread will be woken up when an event occurs causes - * some headaches. - * - * The events lock, event waiters lock, and libusb_handle_events_locked() - * entities are added to solve these problems. You do not need to be concerned - * with these entities otherwise. - * - * See the extra documentation: \ref libusb_mtasync - */ - -/** \page libusb_mtasync Multi-threaded applications and asynchronous I/O - * - * src is a thread-safe library, but extra considerations must be applied - * to applications which interact with src from multiple threads. - * - * The underlying issue that must be addressed is that all src I/O - * revolves around monitoring file descriptors through the poll()/select() - * system calls. This is directly exposed at the - * \ref libusb_asyncio "asynchronous interface" but it is important to note that the - * \ref libusb_syncio "synchronous interface" is implemented on top of the - * asynchonrous interface, therefore the same considerations apply. - * - * The issue is that if two or more threads are concurrently calling poll() - * or select() on src's file descriptors then only one of those threads - * will be woken up when an event arrives. The others will be completely - * oblivious that anything has happened. - * - * Consider the following pseudo-code, which submits an asynchronous transfer - * then waits for its completion. This style is one way you could implement a - * synchronous interface on top of the asynchronous interface (and src - * does something similar, albeit more advanced due to the complications - * explained on this page). - * -\code -void cb(struct libusb_transfer *transfer) -{ - int *completed = transfer->user_data; - *completed = 1; -} - -void myfunc() { - struct libusb_transfer *transfer; - unsigned char buffer[LIBUSB_CONTROL_SETUP_SIZE] __attribute__ ((aligned (2))); - int completed = 0; - - transfer = libusb_alloc_transfer(0); - libusb_fill_control_setup(buffer, - LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_OUT, 0x04, 0x01, 0, 0); - libusb_fill_control_transfer(transfer, dev, buffer, cb, &completed, 1000); - libusb_submit_transfer(transfer); - - while (!completed) { - poll(src file descriptors, 120*1000); - if (poll indicates activity) - libusb_handle_events_timeout(ctx, &zero_tv); - } - printf("completed!"); - // other code here -} -\endcode - * - * Here we are serializing completion of an asynchronous event - * against a condition - the condition being completion of a specific transfer. - * The poll() loop has a long timeout to minimize CPU usage during situations - * when nothing is happening (it could reasonably be unlimited). - * - * If this is the only thread that is polling src's file descriptors, there - * is no problem: there is no danger that another thread will swallow up the - * event that we are interested in. On the other hand, if there is another - * thread polling the same descriptors, there is a chance that it will receive - * the event that we were interested in. In this situation, myfunc() - * will only realise that the transfer has completed on the next iteration of - * the loop, up to 120 seconds later. Clearly a two-minute delay is - * undesirable, and don't even think about using short timeouts to circumvent - * this issue! - * - * The solution here is to ensure that no two threads are ever polling the - * file descriptors at the same time. A naive implementation of this would - * impact the capabilities of the library, so src offers the scheme - * documented below to ensure no loss of functionality. - * - * Before we go any further, it is worth mentioning that all src-wrapped - * event handling procedures fully adhere to the scheme documented below. - * This includes libusb_handle_events() and its variants, and all the - * synchronous I/O functions - src hides this headache from you. - * - * \section Using libusb_handle_events() from multiple threads - * - * Even when only using libusb_handle_events() and synchronous I/O functions, - * you can still have a race condition. You might be tempted to solve the - * above with libusb_handle_events() like so: - * -\code - libusb_submit_transfer(transfer); - - while (!completed) { - libusb_handle_events(ctx); - } - printf("completed!"); -\endcode - * - * This however has a race between the checking of completed and - * libusb_handle_events() acquiring the events lock, so another thread - * could have completed the transfer, resulting in this thread hanging - * until either a timeout or another event occurs. See also commit - * 6696512aade99bb15d6792af90ae329af270eba6 which fixes this in the - * synchronous API implementation of src. - * - * Fixing this race requires checking the variable completed only after - * taking the event lock, which defeats the concept of just calling - * libusb_handle_events() without worrying about locking. This is why - * src-1.0.9 introduces the new libusb_handle_events_timeout_completed() - * and libusb_handle_events_completed() functions, which handles doing the - * completion check for you after they have acquired the lock: - * -\code - libusb_submit_transfer(transfer); - - while (!completed) { - libusb_handle_events_completed(ctx, &completed); - } - printf("completed!"); -\endcode - * - * This nicely fixes the race in our example. Note that if all you want to - * do is submit a single transfer and wait for its completion, then using - * one of the synchronous I/O functions is much easier. - * - * \section eventlock The events lock - * - * The problem is when we consider the fact that src exposes file - * descriptors to allow for you to integrate asynchronous USB I/O into - * existing main loops, effectively allowing you to do some work behind - * src's back. If you do take src's file descriptors and pass them to - * poll()/select() yourself, you need to be aware of the associated issues. - * - * The first concept to be introduced is the events lock. The events lock - * is used to serialize threads that want to handle events, such that only - * one thread is handling events at any one time. - * - * You must take the events lock before polling src file descriptors, - * using libusb_lock_events(). You must release the lock as soon as you have - * aborted your poll()/select() loop, using libusb_unlock_events(). - * - * \section threadwait Letting other threads do the work for you - * - * Although the events lock is a critical part of the solution, it is not - * enough on it's own. You might wonder if the following is sufficient... -\code - libusb_lock_events(ctx); - while (!completed) { - poll(src file descriptors, 120*1000); - if (poll indicates activity) - libusb_handle_events_timeout(ctx, &zero_tv); - } - libusb_unlock_events(ctx); -\endcode - * ...and the answer is that it is not. This is because the transfer in the - * code shown above may take a long time (say 30 seconds) to complete, and - * the lock is not released until the transfer is completed. - * - * Another thread with similar code that wants to do event handling may be - * working with a transfer that completes after a few milliseconds. Despite - * having such a quick completion time, the other thread cannot check that - * status of its transfer until the code above has finished (30 seconds later) - * due to contention on the lock. - * - * To solve this, src offers you a mechanism to determine when another - * thread is handling events. It also offers a mechanism to block your thread - * until the event handling thread has completed an event (and this mechanism - * does not involve polling of file descriptors). - * - * After determining that another thread is currently handling events, you - * obtain the event waiters lock using libusb_lock_event_waiters(). - * You then re-check that some other thread is still handling events, and if - * so, you call libusb_wait_for_event(). - * - * libusb_wait_for_event() puts your application to sleep until an event - * occurs, or until a thread releases the events lock. When either of these - * things happen, your thread is woken up, and should re-check the condition - * it was waiting on. It should also re-check that another thread is handling - * events, and if not, it should start handling events itself. - * - * This looks like the following, as pseudo-code: -\code -retry: -if (libusb_try_lock_events(ctx) == 0) { - // we obtained the event lock: do our own event handling - while (!completed) { - if (!libusb_event_handling_ok(ctx)) { - libusb_unlock_events(ctx); - goto retry; - } - poll(src file descriptors, 120*1000); - if (poll indicates activity) - libusb_handle_events_locked(ctx, 0); - } - libusb_unlock_events(ctx); -} else { - // another thread is doing event handling. wait for it to signal us that - // an event has completed - libusb_lock_event_waiters(ctx); - - while (!completed) { - // now that we have the event waiters lock, double check that another - // thread is still handling events for us. (it may have ceased handling - // events in the time it took us to reach this point) - if (!libusb_event_handler_active(ctx)) { - // whoever was handling events is no longer doing so, try again - libusb_unlock_event_waiters(ctx); - goto retry; - } - - libusb_wait_for_event(ctx, NULL); - } - libusb_unlock_event_waiters(ctx); -} -printf("completed!\n"); -\endcode - * - * A naive look at the above code may suggest that this can only support - * one event waiter (hence a total of 2 competing threads, the other doing - * event handling), because the event waiter seems to have taken the event - * waiters lock while waiting for an event. However, the system does support - * multiple event waiters, because libusb_wait_for_event() actually drops - * the lock while waiting, and reaquires it before continuing. - * - * We have now implemented code which can dynamically handle situations where - * nobody is handling events (so we should do it ourselves), and it can also - * handle situations where another thread is doing event handling (so we can - * piggyback onto them). It is also equipped to handle a combination of - * the two, for example, another thread is doing event handling, but for - * whatever reason it stops doing so before our condition is met, so we take - * over the event handling. - * - * Four functions were introduced in the above pseudo-code. Their importance - * should be apparent from the code shown above. - * -# libusb_try_lock_events() is a non-blocking function which attempts - * to acquire the events lock but returns a failure code if it is contended. - * -# libusb_event_handling_ok() checks that src is still happy for your - * thread to be performing event handling. Sometimes, src needs to - * interrupt the event handler, and this is how you can check if you have - * been interrupted. If this function returns 0, the correct behaviour is - * for you to give up the event handling lock, and then to repeat the cycle. - * The following libusb_try_lock_events() will fail, so you will become an - * events waiter. For more information on this, read \ref fullstory below. - * -# libusb_handle_events_locked() is a variant of - * libusb_handle_events_timeout() that you can call while holding the - * events lock. libusb_handle_events_timeout() itself implements similar - * logic to the above, so be sure not to call it when you are - * "working behind src's back", as is the case here. - * -# libusb_event_handler_active() determines if someone is currently - * holding the events lock - * - * You might be wondering why there is no function to wake up all threads - * blocked on libusb_wait_for_event(). This is because src can do this - * internally: it will wake up all such threads when someone calls - * libusb_unlock_events() or when a transfer completes (at the point after its - * callback has returned). - * - * \subsection fullstory The full story - * - * The above explanation should be enough to get you going, but if you're - * really thinking through the issues then you may be left with some more - * questions regarding src's internals. If you're curious, read on, and if - * not, skip to the next section to avoid confusing yourself! - * - * The immediate question that may spring to mind is: what if one thread - * modifies the set of file descriptors that need to be polled while another - * thread is doing event handling? - * - * There are 2 situations in which this may happen. - * -# libusb_open() will add another file descriptor to the poll set, - * therefore it is desirable to interrupt the event handler so that it - * restarts, picking up the new descriptor. - * -# libusb_close() will remove a file descriptor from the poll set. There - * are all kinds of race conditions that could arise here, so it is - * important that nobody is doing event handling at this time. - * - * src handles these issues internally, so application developers do not - * have to stop their event handlers while opening/closing devices. Here's how - * it works, focusing on the libusb_close() situation first: - * - * -# During initialization, src opens an internal pipe, and it adds the read - * end of this pipe to the set of file descriptors to be polled. - * -# During libusb_close(), src writes some dummy data on this event pipe. - * This immediately interrupts the event handler. src also records - * internally that it is trying to interrupt event handlers for this - * high-priority event. - * -# At this point, some of the functions described above start behaving - * differently: - * - libusb_event_handling_ok() starts returning 1, indicating that it is NOT - * OK for event handling to continue. - * - libusb_try_lock_events() starts returning 1, indicating that another - * thread holds the event handling lock, even if the lock is uncontended. - * - libusb_event_handler_active() starts returning 1, indicating that - * another thread is doing event handling, even if that is not true. - * -# The above changes in behaviour result in the event handler stopping and - * giving up the events lock very quickly, giving the high-priority - * libusb_close() operation a "free ride" to acquire the events lock. All - * threads that are competing to do event handling become event waiters. - * -# With the events lock held inside libusb_close(), src can safely remove - * a file descriptor from the poll set, in the safety of knowledge that - * nobody is polling those descriptors or trying to access the poll set. - * -# After obtaining the events lock, the close operation completes very - * quickly (usually a matter of milliseconds) and then immediately releases - * the events lock. - * -# At the same time, the behaviour of libusb_event_handling_ok() and friends - * reverts to the original, documented behaviour. - * -# The release of the events lock causes the threads that are waiting for - * events to be woken up and to start competing to become event handlers - * again. One of them will succeed; it will then re-obtain the list of poll - * descriptors, and USB I/O will then continue as normal. - * - * libusb_open() is similar, and is actually a more simplistic case. Upon a - * call to libusb_open(): - * - * -# The device is opened and a file descriptor is added to the poll set. - * -# src sends some dummy data on the event pipe, and records that it - * is trying to modify the poll descriptor set. - * -# The event handler is interrupted, and the same behaviour change as for - * libusb_close() takes effect, causing all event handling threads to become - * event waiters. - * -# The libusb_open() implementation takes its free ride to the events lock. - * -# Happy that it has successfully paused the events handler, libusb_open() - * releases the events lock. - * -# The event waiter threads are all woken up and compete to become event - * handlers again. The one that succeeds will obtain the list of poll - * descriptors again, which will include the addition of the new device. - * - * \subsection concl Closing remarks - * - * The above may seem a little complicated, but hopefully I have made it clear - * why such complications are necessary. Also, do not forget that this only - * applies to applications that take src's file descriptors and integrate - * them into their own polling loops. - * - * You may decide that it is OK for your multi-threaded application to ignore - * some of the rules and locks detailed above, because you don't think that - * two threads can ever be polling the descriptors at the same time. If that - * is the case, then that's good news for you because you don't have to worry. - * But be careful here; remember that the synchronous I/O functions do event - * handling internally. If you have one thread doing event handling in a loop - * (without implementing the rules and locking semantics documented above) - * and another trying to send a synchronous USB transfer, you will end up with - * two threads monitoring the same descriptors, and the above-described - * undesirable behaviour occurring. The solution is for your polling thread to - * play by the rules; the synchronous I/O functions do so, and this will result - * in them getting along in perfect harmony. - * - * If you do have a dedicated thread doing event handling, it is perfectly - * legal for it to take the event handling lock for long periods of time. Any - * synchronous I/O functions you call from other threads will transparently - * fall back to the "event waiters" mechanism detailed above. The only - * consideration that your event handling thread must apply is the one related - * to libusb_event_handling_ok(): you must call this before every poll(), and - * give up the events lock if instructed. - */ - -int usbi_io_init(struct libusb_context *ctx) -{ - int r; - - usbi_mutex_init(&ctx->flying_transfers_lock); - usbi_mutex_init(&ctx->events_lock); - usbi_mutex_init(&ctx->event_waiters_lock); - usbi_cond_init(&ctx->event_waiters_cond); - usbi_mutex_init(&ctx->event_data_lock); - usbi_tls_key_create(&ctx->event_handling_key); - list_init(&ctx->flying_transfers); - list_init(&ctx->ipollfds); - list_init(&ctx->removed_ipollfds); - list_init(&ctx->hotplug_msgs); - list_init(&ctx->completed_transfers); - - /* FIXME should use an eventfd on kernels that support it */ - r = usbi_pipe(ctx->event_pipe); - if (r < 0) { - r = LIBUSB_ERROR_OTHER; - goto err; - } - - r = usbi_add_pollfd(ctx, ctx->event_pipe[0], POLLIN); - if (r < 0) - goto err_close_pipe; - -#ifdef USBI_TIMERFD_AVAILABLE - ctx->timerfd = timerfd_create(usbi_backend.get_timerfd_clockid(), - TFD_NONBLOCK | TFD_CLOEXEC); - if (ctx->timerfd >= 0) { - usbi_dbg("using timerfd for timeouts"); - r = usbi_add_pollfd(ctx, ctx->timerfd, POLLIN); - if (r < 0) - goto err_close_timerfd; - } else { - usbi_dbg("timerfd not available (code %d error %d)", ctx->timerfd, errno); - ctx->timerfd = -1; - } -#endif - - return 0; - -#ifdef USBI_TIMERFD_AVAILABLE -err_close_timerfd: - close(ctx->timerfd); - usbi_remove_pollfd(ctx, ctx->event_pipe[0]); -#endif -err_close_pipe: - usbi_close(ctx->event_pipe[0]); - usbi_close(ctx->event_pipe[1]); -err: - usbi_mutex_destroy(&ctx->flying_transfers_lock); - usbi_mutex_destroy(&ctx->events_lock); - usbi_mutex_destroy(&ctx->event_waiters_lock); - usbi_cond_destroy(&ctx->event_waiters_cond); - usbi_mutex_destroy(&ctx->event_data_lock); - usbi_tls_key_delete(ctx->event_handling_key); - return r; -} - -static void cleanup_removed_pollfds(struct libusb_context *ctx) -{ - struct usbi_pollfd *ipollfd, *tmp; - list_for_each_entry_safe(ipollfd, tmp, &ctx->removed_ipollfds, list, struct usbi_pollfd) { - list_del(&ipollfd->list); - free(ipollfd); - } -} - -void usbi_io_exit(struct libusb_context *ctx) -{ - usbi_remove_pollfd(ctx, ctx->event_pipe[0]); - usbi_close(ctx->event_pipe[0]); - usbi_close(ctx->event_pipe[1]); -#ifdef USBI_TIMERFD_AVAILABLE - if (usbi_using_timerfd(ctx)) { - usbi_remove_pollfd(ctx, ctx->timerfd); - close(ctx->timerfd); - } -#endif - usbi_mutex_destroy(&ctx->flying_transfers_lock); - usbi_mutex_destroy(&ctx->events_lock); - usbi_mutex_destroy(&ctx->event_waiters_lock); - usbi_cond_destroy(&ctx->event_waiters_cond); - usbi_mutex_destroy(&ctx->event_data_lock); - usbi_tls_key_delete(ctx->event_handling_key); - free(ctx->pollfds); - cleanup_removed_pollfds(ctx); -} - -static int calculate_timeout(struct usbi_transfer *transfer) -{ - int r; - struct timespec current_time; - unsigned int timeout = - USBI_TRANSFER_TO_LIBUSB_TRANSFER(transfer)->timeout; - - if (!timeout) { - timerclear(&transfer->timeout); - return 0; - } - - r = usbi_backend.clock_gettime(USBI_CLOCK_MONOTONIC, ¤t_time); - if (r < 0) { - usbi_err(ITRANSFER_CTX(transfer), - "failed to read monotonic clock, errno=%d", errno); - return r; - } - - current_time.tv_sec += timeout / 1000; - current_time.tv_nsec += (timeout % 1000) * 1000000; - - while (current_time.tv_nsec >= 1000000000) { - current_time.tv_nsec -= 1000000000; - current_time.tv_sec++; - } - - TIMESPEC_TO_TIMEVAL(&transfer->timeout, ¤t_time); - return 0; -} - -/** \ingroup libusb_asyncio - * Allocate a src transfer with a specified number of isochronous packet - * descriptors. The returned transfer is pre-initialized for you. When the new - * transfer is no longer needed, it should be freed with - * libusb_free_transfer(). - * - * Transfers intended for non-isochronous endpoints (e.g. control, bulk, - * interrupt) should specify an iso_packets count of zero. - * - * For transfers intended for isochronous endpoints, specify an appropriate - * number of packet descriptors to be allocated as part of the transfer. - * The returned transfer is not specially initialized for isochronous I/O; - * you are still required to set the - * \ref libusb_transfer::num_iso_packets "num_iso_packets" and - * \ref libusb_transfer::type "type" fields accordingly. - * - * It is safe to allocate a transfer with some isochronous packets and then - * use it on a non-isochronous endpoint. If you do this, ensure that at time - * of submission, num_iso_packets is 0 and that type is set appropriately. - * - * \param iso_packets number of isochronous packet descriptors to allocate. Must be non-negative. - * \returns a newly allocated transfer, or NULL on error - */ -DEFAULT_VISIBILITY -struct libusb_transfer * LIBUSB_CALL libusb_alloc_transfer( - int iso_packets) -{ - struct libusb_transfer *transfer; - size_t os_alloc_size; - size_t alloc_size; - struct usbi_transfer *itransfer; - - assert(iso_packets >= 0); - - os_alloc_size = usbi_backend.transfer_priv_size; - alloc_size = sizeof(struct usbi_transfer) - + sizeof(struct libusb_transfer) - + (sizeof(struct libusb_iso_packet_descriptor) * (size_t)iso_packets) - + os_alloc_size; - itransfer = calloc(1, alloc_size); - if (!itransfer) - return NULL; - - itransfer->num_iso_packets = iso_packets; - usbi_mutex_init(&itransfer->lock); - transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); - usbi_dbg("transfer %p", transfer); - return transfer; -} - -/** \ingroup libusb_asyncio - * Free a transfer structure. This should be called for all transfers - * allocated with libusb_alloc_transfer(). - * - * If the \ref libusb_transfer_flags::LIBUSB_TRANSFER_FREE_BUFFER - * "LIBUSB_TRANSFER_FREE_BUFFER" flag is set and the transfer buffer is - * non-NULL, this function will also free the transfer buffer using the - * standard system memory allocator (e.g. free()). - * - * It is legal to call this function with a NULL transfer. In this case, - * the function will simply return safely. - * - * It is not legal to free an active transfer (one which has been submitted - * and has not yet completed). - * - * \param transfer the transfer to free - */ -void API_EXPORTED libusb_free_transfer(struct libusb_transfer *transfer) -{ - struct usbi_transfer *itransfer; - if (!transfer) - return; - - usbi_dbg("transfer %p", transfer); - if (transfer->flags & LIBUSB_TRANSFER_FREE_BUFFER) - free(transfer->buffer); - - itransfer = LIBUSB_TRANSFER_TO_USBI_TRANSFER(transfer); - usbi_mutex_destroy(&itransfer->lock); - free(itransfer); -} - -#ifdef USBI_TIMERFD_AVAILABLE -static int disarm_timerfd(struct libusb_context *ctx) -{ - const struct itimerspec disarm_timer = { { 0, 0 }, { 0, 0 } }; - int r; - - usbi_dbg(""); - r = timerfd_settime(ctx->timerfd, 0, &disarm_timer, NULL); - if (r < 0) - return LIBUSB_ERROR_OTHER; - else - return 0; -} - -/* iterates through the flying transfers, and rearms the timerfd based on the - * next upcoming timeout. - * must be called with flying_list locked. - * returns 0 on success or a LIBUSB_ERROR code on failure. - */ -static int arm_timerfd_for_next_timeout(struct libusb_context *ctx) -{ - struct usbi_transfer *transfer; - - list_for_each_entry(transfer, &ctx->flying_transfers, list, struct usbi_transfer) { - struct timeval *cur_tv = &transfer->timeout; - - /* if we've reached transfers of infinite timeout, then we have no - * arming to do */ - if (!timerisset(cur_tv)) - goto disarm; - - /* act on first transfer that has not already been handled */ - if (!(transfer->timeout_flags & (USBI_TRANSFER_TIMEOUT_HANDLED | USBI_TRANSFER_OS_HANDLES_TIMEOUT))) { - int r; - const struct itimerspec it = { {0, 0}, - { cur_tv->tv_sec, cur_tv->tv_usec * 1000 } }; - usbi_dbg("next timeout originally %dms", USBI_TRANSFER_TO_LIBUSB_TRANSFER(transfer)->timeout); - r = timerfd_settime(ctx->timerfd, TFD_TIMER_ABSTIME, &it, NULL); - if (r < 0) - return LIBUSB_ERROR_OTHER; - return 0; - } - } - -disarm: - return disarm_timerfd(ctx); -} -#else -static int arm_timerfd_for_next_timeout(struct libusb_context *ctx) -{ - UNUSED(ctx); - return 0; -} -#endif - -/* add a transfer to the (timeout-sorted) active transfers list. - * This function will return non 0 if fails to update the timer, - * in which case the transfer is *not* on the flying_transfers list. */ -static int add_to_flying_list(struct usbi_transfer *transfer) -{ - struct usbi_transfer *cur; - struct timeval *timeout = &transfer->timeout; - struct libusb_context *ctx = ITRANSFER_CTX(transfer); - int r; - int first = 1; - - r = calculate_timeout(transfer); - if (r) - return r; - - /* if we have no other flying transfers, start the list with this one */ - if (list_empty(&ctx->flying_transfers)) { - list_add(&transfer->list, &ctx->flying_transfers); - goto out; - } - - /* if we have infinite timeout, append to end of list */ - if (!timerisset(timeout)) { - list_add_tail(&transfer->list, &ctx->flying_transfers); - /* first is irrelevant in this case */ - goto out; - } - - /* otherwise, find appropriate place in list */ - list_for_each_entry(cur, &ctx->flying_transfers, list, struct usbi_transfer) { - /* find first timeout that occurs after the transfer in question */ - struct timeval *cur_tv = &cur->timeout; - - if (!timerisset(cur_tv) || (cur_tv->tv_sec > timeout->tv_sec) || - (cur_tv->tv_sec == timeout->tv_sec && - cur_tv->tv_usec > timeout->tv_usec)) { - list_add_tail(&transfer->list, &cur->list); - goto out; - } - first = 0; - } - /* first is 0 at this stage (list not empty) */ - - /* otherwise we need to be inserted at the end */ - list_add_tail(&transfer->list, &ctx->flying_transfers); -out: -#ifdef USBI_TIMERFD_AVAILABLE - if (first && usbi_using_timerfd(ctx) && timerisset(timeout)) { - /* if this transfer has the lowest timeout of all active transfers, - * rearm the timerfd with this transfer's timeout */ - const struct itimerspec it = { {0, 0}, - { timeout->tv_sec, timeout->tv_usec * 1000 } }; - usbi_dbg("arm timerfd for timeout in %dms (first in line)", - USBI_TRANSFER_TO_LIBUSB_TRANSFER(transfer)->timeout); - r = timerfd_settime(ctx->timerfd, TFD_TIMER_ABSTIME, &it, NULL); - if (r < 0) { - usbi_warn(ctx, "failed to arm first timerfd (errno %d)", errno); - r = LIBUSB_ERROR_OTHER; - } - } -#else - UNUSED(first); -#endif - - if (r) - list_del(&transfer->list); - - return r; -} - -/* remove a transfer from the active transfers list. - * This function will *always* remove the transfer from the - * flying_transfers list. It will return a LIBUSB_ERROR code - * if it fails to update the timer for the next timeout. */ -static int remove_from_flying_list(struct usbi_transfer *transfer) -{ - struct libusb_context *ctx = ITRANSFER_CTX(transfer); - int rearm_timerfd; - int r = 0; - - usbi_mutex_lock(&ctx->flying_transfers_lock); - rearm_timerfd = (timerisset(&transfer->timeout) && - list_first_entry(&ctx->flying_transfers, struct usbi_transfer, list) == transfer); - list_del(&transfer->list); - if (usbi_using_timerfd(ctx) && rearm_timerfd) - r = arm_timerfd_for_next_timeout(ctx); - usbi_mutex_unlock(&ctx->flying_transfers_lock); - - return r; -} - -/** \ingroup libusb_asyncio - * Submit a transfer. This function will fire off the USB transfer and then - * return immediately. - * - * \param transfer the transfer to submit - * \returns 0 on success - * \returns LIBUSB_ERROR_NO_DEVICE if the device has been disconnected - * \returns LIBUSB_ERROR_BUSY if the transfer has already been submitted. - * \returns LIBUSB_ERROR_NOT_SUPPORTED if the transfer flags are not supported - * by the operating system. - * \returns LIBUSB_ERROR_INVALID_PARAM if the transfer size is larger than - * the operating system and/or hardware can support - * \returns another LIBUSB_ERROR code on other failure - */ -int API_EXPORTED libusb_submit_transfer(struct libusb_transfer *transfer) -{ - struct usbi_transfer *itransfer = - LIBUSB_TRANSFER_TO_USBI_TRANSFER(transfer); - struct libusb_context *ctx = TRANSFER_CTX(transfer); - int r; - - usbi_dbg("transfer %p", transfer); - - /* - * Important note on locking, this function takes / releases locks - * in the following order: - * take flying_transfers_lock - * take itransfer->lock - * clear transfer - * add to flying_transfers list - * release flying_transfers_lock - * submit transfer - * release itransfer->lock - * if submit failed: - * take flying_transfers_lock - * remove from flying_transfers list - * release flying_transfers_lock - * - * Note that it takes locks in the order a-b and then releases them - * in the same order a-b. This is somewhat unusual but not wrong, - * release order is not important as long as *all* locks are released - * before re-acquiring any locks. - * - * This means that the ordering of first releasing itransfer->lock - * and then re-acquiring the flying_transfers_list on error is - * important and must not be changed! - * - * This is done this way because when we take both locks we must always - * take flying_transfers_lock first to avoid ab-ba style deadlocks with - * the timeout handling and usbi_handle_disconnect paths. - * - * And we cannot release itransfer->lock before the submission is - * complete otherwise timeout handling for transfers with short - * timeouts may run before submission. - */ - usbi_mutex_lock(&ctx->flying_transfers_lock); - usbi_mutex_lock(&itransfer->lock); - if (itransfer->state_flags & USBI_TRANSFER_IN_FLIGHT) { - usbi_mutex_unlock(&ctx->flying_transfers_lock); - usbi_mutex_unlock(&itransfer->lock); - return LIBUSB_ERROR_BUSY; - } - itransfer->transferred = 0; - itransfer->state_flags = 0; - itransfer->timeout_flags = 0; - r = add_to_flying_list(itransfer); - if (r) { - usbi_mutex_unlock(&ctx->flying_transfers_lock); - usbi_mutex_unlock(&itransfer->lock); - return r; - } - /* - * We must release the flying transfers lock here, because with - * some backends the submit_transfer method is synchroneous. - */ - usbi_mutex_unlock(&ctx->flying_transfers_lock); - - r = usbi_backend.submit_transfer(itransfer); - if (r == LIBUSB_SUCCESS) { - itransfer->state_flags |= USBI_TRANSFER_IN_FLIGHT; - /* keep a reference to this device */ - libusb_ref_device(transfer->dev_handle->dev); - } - usbi_mutex_unlock(&itransfer->lock); - - if (r != LIBUSB_SUCCESS) - remove_from_flying_list(itransfer); - - return r; -} - -/** \ingroup libusb_asyncio - * Asynchronously cancel a previously submitted transfer. - * This function returns immediately, but this does not indicate cancellation - * is complete. Your callback function will be invoked at some later time - * with a transfer status of - * \ref libusb_transfer_status::LIBUSB_TRANSFER_CANCELLED - * "LIBUSB_TRANSFER_CANCELLED." - * - * \param transfer the transfer to cancel - * \returns 0 on success - * \returns LIBUSB_ERROR_NOT_FOUND if the transfer is not in progress, - * already complete, or already cancelled. - * \returns a LIBUSB_ERROR code on failure - */ -int API_EXPORTED libusb_cancel_transfer(struct libusb_transfer *transfer) -{ - struct usbi_transfer *itransfer = - LIBUSB_TRANSFER_TO_USBI_TRANSFER(transfer); - int r; - - usbi_dbg("transfer %p", transfer ); - usbi_mutex_lock(&itransfer->lock); - if (!(itransfer->state_flags & USBI_TRANSFER_IN_FLIGHT) - || (itransfer->state_flags & USBI_TRANSFER_CANCELLING)) { - r = LIBUSB_ERROR_NOT_FOUND; - goto out; - } - r = usbi_backend.cancel_transfer(itransfer); - if (r < 0) { - if (r != LIBUSB_ERROR_NOT_FOUND && - r != LIBUSB_ERROR_NO_DEVICE) - usbi_err(TRANSFER_CTX(transfer), - "cancel transfer failed error %d", r); - else - usbi_dbg("cancel transfer failed error %d", r); - - if (r == LIBUSB_ERROR_NO_DEVICE) - itransfer->state_flags |= USBI_TRANSFER_DEVICE_DISAPPEARED; - } - - itransfer->state_flags |= USBI_TRANSFER_CANCELLING; - -out: - usbi_mutex_unlock(&itransfer->lock); - return r; -} - -/** \ingroup libusb_asyncio - * Set a transfers bulk stream id. Note users are advised to use - * libusb_fill_bulk_stream_transfer() instead of calling this function - * directly. - * - * Since version 1.0.19, \ref LIBUSB_API_VERSION >= 0x01000103 - * - * \param transfer the transfer to set the stream id for - * \param stream_id the stream id to set - * \see libusb_alloc_streams() - */ -void API_EXPORTED libusb_transfer_set_stream_id( - struct libusb_transfer *transfer, uint32_t stream_id) -{ - struct usbi_transfer *itransfer = - LIBUSB_TRANSFER_TO_USBI_TRANSFER(transfer); - - itransfer->stream_id = stream_id; -} - -/** \ingroup libusb_asyncio - * Get a transfers bulk stream id. - * - * Since version 1.0.19, \ref LIBUSB_API_VERSION >= 0x01000103 - * - * \param transfer the transfer to get the stream id for - * \returns the stream id for the transfer - */ -uint32_t API_EXPORTED libusb_transfer_get_stream_id( - struct libusb_transfer *transfer) -{ - struct usbi_transfer *itransfer = - LIBUSB_TRANSFER_TO_USBI_TRANSFER(transfer); - - return itransfer->stream_id; -} - -/* Handle completion of a transfer (completion might be an error condition). - * This will invoke the user-supplied callback function, which may end up - * freeing the transfer. Therefore you cannot use the transfer structure - * after calling this function, and you should free all backend-specific - * data before calling it. - * Do not call this function with the usbi_transfer lock held. User-specified - * callback functions may attempt to directly resubmit the transfer, which - * will attempt to take the lock. */ -int usbi_handle_transfer_completion(struct usbi_transfer *itransfer, - enum libusb_transfer_status status) -{ - struct libusb_transfer *transfer = - USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); - struct libusb_device_handle *dev_handle = transfer->dev_handle; - uint8_t flags; - int r; - - r = remove_from_flying_list(itransfer); - if (r < 0) - usbi_err(ITRANSFER_CTX(itransfer), "failed to set timer for next timeout, errno=%d", errno); - - usbi_mutex_lock(&itransfer->lock); - itransfer->state_flags &= ~USBI_TRANSFER_IN_FLIGHT; - usbi_mutex_unlock(&itransfer->lock); - - if (status == LIBUSB_TRANSFER_COMPLETED - && transfer->flags & LIBUSB_TRANSFER_SHORT_NOT_OK) { - int rqlen = transfer->length; - if (transfer->type == LIBUSB_TRANSFER_TYPE_CONTROL) - rqlen -= LIBUSB_CONTROL_SETUP_SIZE; - if (rqlen != itransfer->transferred) { - usbi_dbg("interpreting short transfer as error"); - status = LIBUSB_TRANSFER_ERROR; - } - } - - flags = transfer->flags; - transfer->status = status; - transfer->actual_length = itransfer->transferred; - usbi_dbg("transfer %p has callback %p", transfer, transfer->callback); - if (transfer->callback) - transfer->callback(transfer); - /* transfer might have been freed by the above call, do not use from - * this point. */ - if (flags & LIBUSB_TRANSFER_FREE_TRANSFER) - libusb_free_transfer(transfer); - libusb_unref_device(dev_handle->dev); - return r; -} - -/* Similar to usbi_handle_transfer_completion() but exclusively for transfers - * that were asynchronously cancelled. The same concerns w.r.t. freeing of - * transfers exist here. - * Do not call this function with the usbi_transfer lock held. User-specified - * callback functions may attempt to directly resubmit the transfer, which - * will attempt to take the lock. */ -int usbi_handle_transfer_cancellation(struct usbi_transfer *transfer) -{ - struct libusb_context *ctx = ITRANSFER_CTX(transfer); - uint8_t timed_out; - - usbi_mutex_lock(&ctx->flying_transfers_lock); - timed_out = transfer->timeout_flags & USBI_TRANSFER_TIMED_OUT; - usbi_mutex_unlock(&ctx->flying_transfers_lock); - - /* if the URB was cancelled due to timeout, report timeout to the user */ - if (timed_out) { - usbi_dbg("detected timeout cancellation"); - return usbi_handle_transfer_completion(transfer, LIBUSB_TRANSFER_TIMED_OUT); - } - - /* otherwise its a normal async cancel */ - return usbi_handle_transfer_completion(transfer, LIBUSB_TRANSFER_CANCELLED); -} - -/* Add a completed transfer to the completed_transfers list of the - * context and signal the event. The backend's handle_transfer_completion() - * function will be called the next time an event handler runs. */ -void usbi_signal_transfer_completion(struct usbi_transfer *transfer) -{ - libusb_device_handle *dev_handle = USBI_TRANSFER_TO_LIBUSB_TRANSFER(transfer)->dev_handle; - - if (dev_handle) { - struct libusb_context *ctx = HANDLE_CTX(dev_handle); - int pending_events; - - usbi_mutex_lock(&ctx->event_data_lock); - pending_events = usbi_pending_events(ctx); - list_add_tail(&transfer->completed_list, &ctx->completed_transfers); - if (!pending_events) - usbi_signal_event(ctx); - usbi_mutex_unlock(&ctx->event_data_lock); - } -} - -/** \ingroup libusb_poll - * Attempt to acquire the event handling lock. This lock is used to ensure that - * only one thread is monitoring src event sources at any one time. - * - * You only need to use this lock if you are developing an application - * which calls poll() or select() on src's file descriptors directly. - * If you stick to src's event handling loop functions (e.g. - * libusb_handle_events()) then you do not need to be concerned with this - * locking. - * - * While holding this lock, you are trusted to actually be handling events. - * If you are no longer handling events, you must call libusb_unlock_events() - * as soon as possible. - * - * \param ctx the context to operate on, or NULL for the default context - * \returns 0 if the lock was obtained successfully - * \returns 1 if the lock was not obtained (i.e. another thread holds the lock) - * \ref libusb_mtasync - */ -int API_EXPORTED libusb_try_lock_events(libusb_context *ctx) -{ - int r; - unsigned int ru; - USBI_GET_CONTEXT(ctx); - - /* is someone else waiting to close a device? if so, don't let this thread - * start event handling */ - usbi_mutex_lock(&ctx->event_data_lock); - ru = ctx->device_close; - usbi_mutex_unlock(&ctx->event_data_lock); - if (ru) { - usbi_dbg("someone else is closing a device"); - return 1; - } - - r = usbi_mutex_trylock(&ctx->events_lock); - if (r) - return 1; - - ctx->event_handler_active = 1; - return 0; -} - -/** \ingroup libusb_poll - * Acquire the event handling lock, blocking until successful acquisition if - * it is contended. This lock is used to ensure that only one thread is - * monitoring src event sources at any one time. - * - * You only need to use this lock if you are developing an application - * which calls poll() or select() on src's file descriptors directly. - * If you stick to src's event handling loop functions (e.g. - * libusb_handle_events()) then you do not need to be concerned with this - * locking. - * - * While holding this lock, you are trusted to actually be handling events. - * If you are no longer handling events, you must call libusb_unlock_events() - * as soon as possible. - * - * \param ctx the context to operate on, or NULL for the default context - * \ref libusb_mtasync - */ -void API_EXPORTED libusb_lock_events(libusb_context *ctx) -{ - USBI_GET_CONTEXT(ctx); - usbi_mutex_lock(&ctx->events_lock); - ctx->event_handler_active = 1; -} - -/** \ingroup libusb_poll - * Release the lock previously acquired with libusb_try_lock_events() or - * libusb_lock_events(). Releasing this lock will wake up any threads blocked - * on libusb_wait_for_event(). - * - * \param ctx the context to operate on, or NULL for the default context - * \ref libusb_mtasync - */ -void API_EXPORTED libusb_unlock_events(libusb_context *ctx) -{ - USBI_GET_CONTEXT(ctx); - ctx->event_handler_active = 0; - usbi_mutex_unlock(&ctx->events_lock); - - /* FIXME: perhaps we should be a bit more efficient by not broadcasting - * the availability of the events lock when we are modifying pollfds - * (check ctx->device_close)? */ - usbi_mutex_lock(&ctx->event_waiters_lock); - usbi_cond_broadcast(&ctx->event_waiters_cond); - usbi_mutex_unlock(&ctx->event_waiters_lock); -} - -/** \ingroup libusb_poll - * Determine if it is still OK for this thread to be doing event handling. - * - * Sometimes, src needs to temporarily pause all event handlers, and this - * is the function you should use before polling file descriptors to see if - * this is the case. - * - * If this function instructs your thread to give up the events lock, you - * should just continue the usual logic that is documented in \ref libusb_mtasync. - * On the next iteration, your thread will fail to obtain the events lock, - * and will hence become an event waiter. - * - * This function should be called while the events lock is held: you don't - * need to worry about the results of this function if your thread is not - * the current event handler. - * - * \param ctx the context to operate on, or NULL for the default context - * \returns 1 if event handling can start or continue - * \returns 0 if this thread must give up the events lock - * \ref fullstory "Multi-threaded I/O: the full story" - */ -int API_EXPORTED libusb_event_handling_ok(libusb_context *ctx) -{ - unsigned int r; - USBI_GET_CONTEXT(ctx); - - /* is someone else waiting to close a device? if so, don't let this thread - * continue event handling */ - usbi_mutex_lock(&ctx->event_data_lock); - r = ctx->device_close; - usbi_mutex_unlock(&ctx->event_data_lock); - if (r) { - usbi_dbg("someone else is closing a device"); - return 0; - } - - return 1; -} - - -/** \ingroup libusb_poll - * Determine if an active thread is handling events (i.e. if anyone is holding - * the event handling lock). - * - * \param ctx the context to operate on, or NULL for the default context - * \returns 1 if a thread is handling events - * \returns 0 if there are no threads currently handling events - * \ref libusb_mtasync - */ -int API_EXPORTED libusb_event_handler_active(libusb_context *ctx) -{ - unsigned int r; - USBI_GET_CONTEXT(ctx); - - /* is someone else waiting to close a device? if so, don't let this thread - * start event handling -- indicate that event handling is happening */ - usbi_mutex_lock(&ctx->event_data_lock); - r = ctx->device_close; - usbi_mutex_unlock(&ctx->event_data_lock); - if (r) { - usbi_dbg("someone else is closing a device"); - return 1; - } - - return ctx->event_handler_active; -} - -/** \ingroup libusb_poll - * Interrupt any active thread that is handling events. This is mainly useful - * for interrupting a dedicated event handling thread when an application - * wishes to call libusb_exit(). - * - * Since version 1.0.21, \ref LIBUSB_API_VERSION >= 0x01000105 - * - * \param ctx the context to operate on, or NULL for the default context - * \ref libusb_mtasync - */ -void API_EXPORTED libusb_interrupt_event_handler(libusb_context *ctx) -{ - int pending_events; - USBI_GET_CONTEXT(ctx); - - usbi_dbg(""); - usbi_mutex_lock(&ctx->event_data_lock); - - pending_events = usbi_pending_events(ctx); - ctx->event_flags |= USBI_EVENT_USER_INTERRUPT; - if (!pending_events) - usbi_signal_event(ctx); - - usbi_mutex_unlock(&ctx->event_data_lock); -} - -/** \ingroup libusb_poll - * Acquire the event waiters lock. This lock is designed to be obtained under - * the situation where you want to be aware when events are completed, but - * some other thread is event handling so calling libusb_handle_events() is not - * allowed. - * - * You then obtain this lock, re-check that another thread is still handling - * events, then call libusb_wait_for_event(). - * - * You only need to use this lock if you are developing an application - * which calls poll() or select() on src's file descriptors directly, - * and may potentially be handling events from 2 threads simultaenously. - * If you stick to src's event handling loop functions (e.g. - * libusb_handle_events()) then you do not need to be concerned with this - * locking. - * - * \param ctx the context to operate on, or NULL for the default context - * \ref libusb_mtasync - */ -void API_EXPORTED libusb_lock_event_waiters(libusb_context *ctx) -{ - USBI_GET_CONTEXT(ctx); - usbi_mutex_lock(&ctx->event_waiters_lock); -} - -/** \ingroup libusb_poll - * Release the event waiters lock. - * \param ctx the context to operate on, or NULL for the default context - * \ref libusb_mtasync - */ -void API_EXPORTED libusb_unlock_event_waiters(libusb_context *ctx) -{ - USBI_GET_CONTEXT(ctx); - usbi_mutex_unlock(&ctx->event_waiters_lock); -} - -/** \ingroup libusb_poll - * Wait for another thread to signal completion of an event. Must be called - * with the event waiters lock held, see libusb_lock_event_waiters(). - * - * This function will block until any of the following conditions are met: - * -# The timeout expires - * -# A transfer completes - * -# A thread releases the event handling lock through libusb_unlock_events() - * - * Condition 1 is obvious. Condition 2 unblocks your thread after - * the callback for the transfer has completed. Condition 3 is important - * because it means that the thread that was previously handling events is no - * longer doing so, so if any events are to complete, another thread needs to - * step up and start event handling. - * - * This function releases the event waiters lock before putting your thread - * to sleep, and reacquires the lock as it is being woken up. - * - * \param ctx the context to operate on, or NULL for the default context - * \param tv maximum timeout for this blocking function. A NULL value - * indicates unlimited timeout. - * \returns 0 after a transfer completes or another thread stops event handling - * \returns 1 if the timeout expired - * \ref libusb_mtasync - */ -int API_EXPORTED libusb_wait_for_event(libusb_context *ctx, struct timeval *tv) -{ - int r; - - USBI_GET_CONTEXT(ctx); - if (tv == NULL) { - usbi_cond_wait(&ctx->event_waiters_cond, &ctx->event_waiters_lock); - return 0; - } - - r = usbi_cond_timedwait(&ctx->event_waiters_cond, - &ctx->event_waiters_lock, tv); - - if (r < 0) - return r; - else - return (r == ETIMEDOUT); -} - -static void handle_timeout(struct usbi_transfer *itransfer) -{ - struct libusb_transfer *transfer = - USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); - int r; - - itransfer->timeout_flags |= USBI_TRANSFER_TIMEOUT_HANDLED; - r = libusb_cancel_transfer(transfer); - if (r == LIBUSB_SUCCESS) - itransfer->timeout_flags |= USBI_TRANSFER_TIMED_OUT; - else - usbi_warn(TRANSFER_CTX(transfer), - "async cancel failed %d errno=%d", r, errno); -} - -static int handle_timeouts_locked(struct libusb_context *ctx) -{ - int r; - struct timespec systime_ts; - struct timeval systime; - struct usbi_transfer *transfer; - - if (list_empty(&ctx->flying_transfers)) - return 0; - - /* get current time */ - r = usbi_backend.clock_gettime(USBI_CLOCK_MONOTONIC, &systime_ts); - if (r < 0) - return r; - - TIMESPEC_TO_TIMEVAL(&systime, &systime_ts); - - /* iterate through flying transfers list, finding all transfers that - * have expired timeouts */ - list_for_each_entry(transfer, &ctx->flying_transfers, list, struct usbi_transfer) { - struct timeval *cur_tv = &transfer->timeout; - - /* if we've reached transfers of infinite timeout, we're all done */ - if (!timerisset(cur_tv)) - return 0; - - /* ignore timeouts we've already handled */ - if (transfer->timeout_flags & (USBI_TRANSFER_TIMEOUT_HANDLED | USBI_TRANSFER_OS_HANDLES_TIMEOUT)) - continue; - - /* if transfer has non-expired timeout, nothing more to do */ - if ((cur_tv->tv_sec > systime.tv_sec) || - (cur_tv->tv_sec == systime.tv_sec && - cur_tv->tv_usec > systime.tv_usec)) - return 0; - - /* otherwise, we've got an expired timeout to handle */ - handle_timeout(transfer); - } - return 0; -} - -static int handle_timeouts(struct libusb_context *ctx) -{ - int r; - USBI_GET_CONTEXT(ctx); - usbi_mutex_lock(&ctx->flying_transfers_lock); - r = handle_timeouts_locked(ctx); - usbi_mutex_unlock(&ctx->flying_transfers_lock); - return r; -} - -#ifdef USBI_TIMERFD_AVAILABLE -static int handle_timerfd_trigger(struct libusb_context *ctx) -{ - int r; - - usbi_mutex_lock(&ctx->flying_transfers_lock); - - /* process the timeout that just happened */ - r = handle_timeouts_locked(ctx); - if (r < 0) - goto out; - - /* arm for next timeout*/ - r = arm_timerfd_for_next_timeout(ctx); - -out: - usbi_mutex_unlock(&ctx->flying_transfers_lock); - return r; -} -#endif - -/* do the actual event handling. assumes that no other thread is concurrently - * doing the same thing. */ -static int handle_events(struct libusb_context *ctx, struct timeval *tv) -{ - int r; - struct usbi_pollfd *ipollfd; - POLL_NFDS_TYPE nfds = 0; - POLL_NFDS_TYPE internal_nfds; - struct pollfd *fds = NULL; - int i = -1; - int timeout_ms; - - /* prevent attempts to recursively handle events (e.g. calling into - * libusb_handle_events() from within a hotplug or transfer callback) */ - usbi_mutex_lock(&ctx->event_data_lock); - r = 0; - if (usbi_handling_events(ctx)) - r = LIBUSB_ERROR_BUSY; - else - usbi_start_event_handling(ctx); - usbi_mutex_unlock(&ctx->event_data_lock); - - if (r) - return r; - - /* there are certain fds that src uses internally, currently: - * - * 1) event pipe - * 2) timerfd - * - * the backend will never need to attempt to handle events on these fds, so - * we determine how many fds are in use internally for this context and when - * handle_events() is called in the backend, the pollfd list and count will - * be adjusted to skip over these internal fds */ - if (usbi_using_timerfd(ctx)) - internal_nfds = 2; - else - internal_nfds = 1; - - /* only reallocate the poll fds when the list of poll fds has been modified - * since the last poll, otherwise reuse them to save the additional overhead */ - usbi_mutex_lock(&ctx->event_data_lock); - /* clean up removed poll fds */ - cleanup_removed_pollfds(ctx); - if (ctx->event_flags & USBI_EVENT_POLLFDS_MODIFIED) { - usbi_dbg("poll fds modified, reallocating"); - - free(ctx->pollfds); - ctx->pollfds = NULL; - - /* sanity check - it is invalid for a context to have fewer than the - * required internal fds (memory corruption?) */ - assert(ctx->pollfds_cnt >= internal_nfds); - - ctx->pollfds = calloc(ctx->pollfds_cnt, sizeof(*ctx->pollfds)); - if (!ctx->pollfds) { - usbi_mutex_unlock(&ctx->event_data_lock); - r = LIBUSB_ERROR_NO_MEM; - goto done; - } - - list_for_each_entry(ipollfd, &ctx->ipollfds, list, struct usbi_pollfd) { - struct libusb_pollfd *pollfd = &ipollfd->pollfd; - i++; - ctx->pollfds[i].fd = pollfd->fd; - ctx->pollfds[i].events = pollfd->events; - } - - /* reset the flag now that we have the updated list */ - ctx->event_flags &= ~USBI_EVENT_POLLFDS_MODIFIED; - - /* if no further pending events, clear the event pipe so that we do - * not immediately return from poll */ - if (!usbi_pending_events(ctx)) - usbi_clear_event(ctx); - } - fds = ctx->pollfds; - nfds = ctx->pollfds_cnt; - usbi_inc_fds_ref(fds, nfds); - usbi_mutex_unlock(&ctx->event_data_lock); - - timeout_ms = (int)(tv->tv_sec * 1000) + (tv->tv_usec / 1000); - - /* round up to next millisecond */ - if (tv->tv_usec % 1000) - timeout_ms++; - - usbi_dbg("poll() %d fds with timeout in %dms", (int)nfds, timeout_ms); - r = usbi_poll(fds, nfds, timeout_ms); - usbi_dbg("poll() returned %d", r); - if (r == 0) { - r = handle_timeouts(ctx); - goto done; - } else if (r == -1 && errno == EINTR) { - r = LIBUSB_ERROR_INTERRUPTED; - goto done; - } else if (r < 0) { - usbi_err(ctx, "poll failed %d err=%d", r, errno); - r = LIBUSB_ERROR_IO; - goto done; - } - - /* fds[0] is always the event pipe */ - if (fds[0].revents) { - struct list_head hotplug_msgs; - struct usbi_transfer *itransfer; - int hotplug_cb_deregistered = 0; - int ret = 0; - - list_init(&hotplug_msgs); - - usbi_dbg("caught a fish on the event pipe"); - - /* take the the event data lock while processing events */ - usbi_mutex_lock(&ctx->event_data_lock); - - /* check if someone added a new poll fd */ - if (ctx->event_flags & USBI_EVENT_POLLFDS_MODIFIED) - usbi_dbg("someone updated the poll fds"); - - if (ctx->event_flags & USBI_EVENT_USER_INTERRUPT) { - usbi_dbg("someone purposely interrupted"); - ctx->event_flags &= ~USBI_EVENT_USER_INTERRUPT; - } - - if (ctx->event_flags & USBI_EVENT_HOTPLUG_CB_DEREGISTERED) { - usbi_dbg("someone unregistered a hotplug cb"); - ctx->event_flags &= ~USBI_EVENT_HOTPLUG_CB_DEREGISTERED; - hotplug_cb_deregistered = 1; - } - - /* check if someone is closing a device */ - if (ctx->device_close) - usbi_dbg("someone is closing a device"); - - /* check for any pending hotplug messages */ - if (!list_empty(&ctx->hotplug_msgs)) { - usbi_dbg("hotplug message received"); - list_cut(&hotplug_msgs, &ctx->hotplug_msgs); - } - - /* complete any pending transfers */ - while (ret == 0 && !list_empty(&ctx->completed_transfers)) { - itransfer = list_first_entry(&ctx->completed_transfers, struct usbi_transfer, completed_list); - list_del(&itransfer->completed_list); - usbi_mutex_unlock(&ctx->event_data_lock); - ret = usbi_backend.handle_transfer_completion(itransfer); - if (ret) - usbi_err(ctx, "backend handle_transfer_completion failed with error %d", ret); - usbi_mutex_lock(&ctx->event_data_lock); - } - - /* if no further pending events, clear the event pipe */ - if (!usbi_pending_events(ctx)) - usbi_clear_event(ctx); - - usbi_mutex_unlock(&ctx->event_data_lock); - - if (hotplug_cb_deregistered) - usbi_hotplug_deregister(ctx, 0); - - /* process the hotplug messages, if any */ - while (!list_empty(&hotplug_msgs)) { - struct libusb_hotplug_message *message = - list_first_entry(&hotplug_msgs, struct libusb_hotplug_message, list); - - usbi_hotplug_match(ctx, message->device, message->event); - - /* the device left, dereference the device */ - if (LIBUSB_HOTPLUG_EVENT_DEVICE_LEFT == message->event) - libusb_unref_device(message->device); - - list_del(&message->list); - free(message); - } - - if (ret) { - /* return error code */ - r = ret; - goto done; - } - - if (0 == --r) - goto done; - } - -#ifdef USBI_TIMERFD_AVAILABLE - /* on timerfd configurations, fds[1] is the timerfd */ - if (usbi_using_timerfd(ctx) && fds[1].revents) { - /* timerfd indicates that a timeout has expired */ - int ret; - usbi_dbg("timerfd triggered"); - - ret = handle_timerfd_trigger(ctx); - if (ret < 0) { - /* return error code */ - r = ret; - goto done; - } - - if (0 == --r) - goto done; - } -#endif - - list_for_each_entry(ipollfd, &ctx->removed_ipollfds, list, struct usbi_pollfd) { - for (i = internal_nfds ; i < nfds ; ++i) { - if (ipollfd->pollfd.fd == fds[i].fd) { - /* pollfd was removed between the creation of the fd - * array and here. remove any triggered revent as - * it is no longer relevant */ - usbi_dbg("pollfd %d was removed. ignoring raised events", - fds[i].fd); - fds[i].revents = 0; - break; - } - } - } - - r = usbi_backend.handle_events(ctx, fds + internal_nfds, nfds - internal_nfds, r); - if (r) - usbi_err(ctx, "backend handle_events failed with error %d", r); - -done: - usbi_end_event_handling(ctx); - usbi_dec_fds_ref(fds, nfds); - return r; -} - -/* returns the smallest of: - * 1. timeout of next URB - * 2. user-supplied timeout - * returns 1 if there is an already-expired timeout, otherwise returns 0 - * and populates out - */ -static int get_next_timeout(libusb_context *ctx, struct timeval *tv, - struct timeval *out) -{ - struct timeval timeout; - int r = libusb_get_next_timeout(ctx, &timeout); - if (r) { - /* timeout already expired? */ - if (!timerisset(&timeout)) - return 1; - - /* choose the smallest of next URB timeout or user specified timeout */ - if (timercmp(&timeout, tv, <)) - *out = timeout; - else - *out = *tv; - } else { - *out = *tv; - } - return 0; -} - -/** \ingroup libusb_poll - * Handle any pending events. - * - * src determines "pending events" by checking if any timeouts have expired - * and by checking the set of file descriptors for activity. - * - * If a zero timeval is passed, this function will handle any already-pending - * events and then immediately return in non-blocking style. - * - * If a non-zero timeval is passed and no events are currently pending, this - * function will block waiting for events to handle up until the specified - * timeout. If an event arrives or a signal is raised, this function will - * return early. - * - * If the parameter completed is not NULL then after obtaining the event - * handling lock this function will return immediately if the integer - * pointed to is not 0. This allows for race free waiting for the completion - * of a specific transfer. - * - * \param ctx the context to operate on, or NULL for the default context - * \param tv the maximum time to block waiting for events, or an all zero - * timeval struct for non-blocking mode - * \param completed pointer to completion integer to check, or NULL - * \returns 0 on success, or a LIBUSB_ERROR code on failure - * \ref libusb_mtasync - */ -int API_EXPORTED libusb_handle_events_timeout_completed(libusb_context *ctx, - struct timeval *tv, int *completed) -{ - int r; - struct timeval poll_timeout; - - USBI_GET_CONTEXT(ctx); - r = get_next_timeout(ctx, tv, &poll_timeout); - if (r) { - /* timeout already expired */ - return handle_timeouts(ctx); - } - -retry: - if (libusb_try_lock_events(ctx) == 0) { - if (completed == NULL || !*completed) { - /* we obtained the event lock: do our own event handling */ - usbi_dbg("doing our own event handling"); - r = handle_events(ctx, &poll_timeout); - } - libusb_unlock_events(ctx); - return r; - } - - /* another thread is doing event handling. wait for thread events that - * notify event completion. */ - libusb_lock_event_waiters(ctx); - - if (completed && *completed) - goto already_done; - - if (!libusb_event_handler_active(ctx)) { - /* we hit a race: whoever was event handling earlier finished in the - * time it took us to reach this point. try the cycle again. */ - libusb_unlock_event_waiters(ctx); - usbi_dbg("event handler was active but went away, retrying"); - goto retry; - } - - usbi_dbg("another thread is doing event handling"); - r = libusb_wait_for_event(ctx, &poll_timeout); - -already_done: - libusb_unlock_event_waiters(ctx); - - if (r < 0) - return r; - else if (r == 1) - return handle_timeouts(ctx); - else - return 0; -} - -/** \ingroup libusb_poll - * Handle any pending events - * - * Like libusb_handle_events_timeout_completed(), but without the completed - * parameter, calling this function is equivalent to calling - * libusb_handle_events_timeout_completed() with a NULL completed parameter. - * - * This function is kept primarily for backwards compatibility. - * All new code should call libusb_handle_events_completed() or - * libusb_handle_events_timeout_completed() to avoid race conditions. - * - * \param ctx the context to operate on, or NULL for the default context - * \param tv the maximum time to block waiting for events, or an all zero - * timeval struct for non-blocking mode - * \returns 0 on success, or a LIBUSB_ERROR code on failure - */ -int API_EXPORTED libusb_handle_events_timeout(libusb_context *ctx, - struct timeval *tv) -{ - return libusb_handle_events_timeout_completed(ctx, tv, NULL); -} - -/** \ingroup libusb_poll - * Handle any pending events in blocking mode. There is currently a timeout - * hardcoded at 60 seconds but we plan to make it unlimited in future. For - * finer control over whether this function is blocking or non-blocking, or - * for control over the timeout, use libusb_handle_events_timeout_completed() - * instead. - * - * This function is kept primarily for backwards compatibility. - * All new code should call libusb_handle_events_completed() or - * libusb_handle_events_timeout_completed() to avoid race conditions. - * - * \param ctx the context to operate on, or NULL for the default context - * \returns 0 on success, or a LIBUSB_ERROR code on failure - */ -int API_EXPORTED libusb_handle_events(libusb_context *ctx) -{ - struct timeval tv; - tv.tv_sec = 60; - tv.tv_usec = 0; - return libusb_handle_events_timeout_completed(ctx, &tv, NULL); -} - -/** \ingroup libusb_poll - * Handle any pending events in blocking mode. - * - * Like libusb_handle_events(), with the addition of a completed parameter - * to allow for race free waiting for the completion of a specific transfer. - * - * See libusb_handle_events_timeout_completed() for details on the completed - * parameter. - * - * \param ctx the context to operate on, or NULL for the default context - * \param completed pointer to completion integer to check, or NULL - * \returns 0 on success, or a LIBUSB_ERROR code on failure - * \ref libusb_mtasync - */ -int API_EXPORTED libusb_handle_events_completed(libusb_context *ctx, - int *completed) -{ - struct timeval tv; - tv.tv_sec = 60; - tv.tv_usec = 0; - return libusb_handle_events_timeout_completed(ctx, &tv, completed); -} - -/** \ingroup libusb_poll - * Handle any pending events by polling file descriptors, without checking if - * any other threads are already doing so. Must be called with the event lock - * held, see libusb_lock_events(). - * - * This function is designed to be called under the situation where you have - * taken the event lock and are calling poll()/select() directly on src's - * file descriptors (as opposed to using libusb_handle_events() or similar). - * You detect events on src's descriptors, so you then call this function - * with a zero timeout value (while still holding the event lock). - * - * \param ctx the context to operate on, or NULL for the default context - * \param tv the maximum time to block waiting for events, or zero for - * non-blocking mode - * \returns 0 on success, or a LIBUSB_ERROR code on failure - * \ref libusb_mtasync - */ -int API_EXPORTED libusb_handle_events_locked(libusb_context *ctx, - struct timeval *tv) -{ - int r; - struct timeval poll_timeout; - - USBI_GET_CONTEXT(ctx); - r = get_next_timeout(ctx, tv, &poll_timeout); - if (r) { - /* timeout already expired */ - return handle_timeouts(ctx); - } - - return handle_events(ctx, &poll_timeout); -} - -/** \ingroup libusb_poll - * Determines whether your application must apply special timing considerations - * when monitoring src's file descriptors. - * - * This function is only useful for applications which retrieve and poll - * src's file descriptors in their own main loop (\ref libusb_pollmain). - * - * Ordinarily, src's event handler needs to be called into at specific - * moments in time (in addition to times when there is activity on the file - * descriptor set). The usual approach is to use libusb_get_next_timeout() - * to learn about when the next timeout occurs, and to adjust your - * poll()/select() timeout accordingly so that you can make a call into the - * library at that time. - * - * Some platforms supported by src do not come with this baggage - any - * events relevant to timing will be represented by activity on the file - * descriptor set, and libusb_get_next_timeout() will always return 0. - * This function allows you to detect whether you are running on such a - * platform. - * - * Since v1.0.5. - * - * \param ctx the context to operate on, or NULL for the default context - * \returns 0 if you must call into src at times determined by - * libusb_get_next_timeout(), or 1 if all timeout events are handled internally - * or through regular activity on the file descriptors. - * \ref libusb_pollmain "Polling src file descriptors for event handling" - */ -int API_EXPORTED libusb_pollfds_handle_timeouts(libusb_context *ctx) -{ -#if defined(USBI_TIMERFD_AVAILABLE) - USBI_GET_CONTEXT(ctx); - return usbi_using_timerfd(ctx); -#else - UNUSED(ctx); - return 0; -#endif -} - -/** \ingroup libusb_poll - * Determine the next internal timeout that src needs to handle. You only - * need to use this function if you are calling poll() or select() or similar - * on src's file descriptors yourself - you do not need to use it if you - * are calling libusb_handle_events() or a variant directly. - * - * You should call this function in your main loop in order to determine how - * long to wait for select() or poll() to return results. src needs to be - * called into at this timeout, so you should use it as an upper bound on - * your select() or poll() call. - * - * When the timeout has expired, call into libusb_handle_events_timeout() - * (perhaps in non-blocking mode) so that src can handle the timeout. - * - * This function may return 1 (success) and an all-zero timeval. If this is - * the case, it indicates that src has a timeout that has already expired - * so you should call libusb_handle_events_timeout() or similar immediately. - * A return code of 0 indicates that there are no pending timeouts. - * - * On some platforms, this function will always returns 0 (no pending - * timeouts). See \ref polltime. - * - * \param ctx the context to operate on, or NULL for the default context - * \param tv output location for a relative time against the current - * clock in which src must be called into in order to process timeout events - * \returns 0 if there are no pending timeouts, 1 if a timeout was returned, - * or LIBUSB_ERROR_OTHER on failure - */ -int API_EXPORTED libusb_get_next_timeout(libusb_context *ctx, - struct timeval *tv) -{ - struct usbi_transfer *transfer; - struct timespec cur_ts; - struct timeval cur_tv; - struct timeval next_timeout = { 0, 0 }; - int r; - - USBI_GET_CONTEXT(ctx); - if (usbi_using_timerfd(ctx)) - return 0; - - usbi_mutex_lock(&ctx->flying_transfers_lock); - if (list_empty(&ctx->flying_transfers)) { - usbi_mutex_unlock(&ctx->flying_transfers_lock); - usbi_dbg("no URBs, no timeout!"); - return 0; - } - - /* find next transfer which hasn't already been processed as timed out */ - list_for_each_entry(transfer, &ctx->flying_transfers, list, struct usbi_transfer) { - if (transfer->timeout_flags & (USBI_TRANSFER_TIMEOUT_HANDLED | USBI_TRANSFER_OS_HANDLES_TIMEOUT)) - continue; - - /* if we've reached transfers of infinte timeout, we're done looking */ - if (!timerisset(&transfer->timeout)) - break; - - next_timeout = transfer->timeout; - break; - } - usbi_mutex_unlock(&ctx->flying_transfers_lock); - - if (!timerisset(&next_timeout)) { - usbi_dbg("no URB with timeout or all handled by OS; no timeout!"); - return 0; - } - - r = usbi_backend.clock_gettime(USBI_CLOCK_MONOTONIC, &cur_ts); - if (r < 0) { - usbi_err(ctx, "failed to read monotonic clock, errno=%d", errno); - return 0; - } - TIMESPEC_TO_TIMEVAL(&cur_tv, &cur_ts); - - if (!timercmp(&cur_tv, &next_timeout, <)) { - usbi_dbg("first timeout already expired"); - timerclear(tv); - } else { - timersub(&next_timeout, &cur_tv, tv); - usbi_dbg("next timeout in %ld.%06lds", (long)tv->tv_sec, (long)tv->tv_usec); - } - - return 1; -} - -/** \ingroup libusb_poll - * Register notification functions for file descriptor additions/removals. - * These functions will be invoked for every new or removed file descriptor - * that src uses as an event source. - * - * To remove notifiers, pass NULL values for the function pointers. - * - * Note that file descriptors may have been added even before you register - * these notifiers (e.g. at libusb_init() time). - * - * Additionally, note that the removal notifier may be called during - * libusb_exit() (e.g. when it is closing file descriptors that were opened - * and added to the poll set at libusb_init() time). If you don't want this, - * remove the notifiers immediately before calling libusb_exit(). - * - * \param ctx the context to operate on, or NULL for the default context - * \param added_cb pointer to function for addition notifications - * \param removed_cb pointer to function for removal notifications - * \param user_data User data to be passed back to callbacks (useful for - * passing context information) - */ -void API_EXPORTED libusb_set_pollfd_notifiers(libusb_context *ctx, - libusb_pollfd_added_cb added_cb, libusb_pollfd_removed_cb removed_cb, - void *user_data) -{ - USBI_GET_CONTEXT(ctx); - ctx->fd_added_cb = added_cb; - ctx->fd_removed_cb = removed_cb; - ctx->fd_cb_user_data = user_data; -} - -/* - * Interrupt the iteration of the event handling thread, so that it picks - * up the fd change. Callers of this function must hold the event_data_lock. - */ -static void usbi_fd_notification(struct libusb_context *ctx) -{ - int pending_events; - - /* Record that there is a new poll fd. - * Only signal an event if there are no prior pending events. */ - pending_events = usbi_pending_events(ctx); - ctx->event_flags |= USBI_EVENT_POLLFDS_MODIFIED; - if (!pending_events) - usbi_signal_event(ctx); -} - -/* Add a file descriptor to the list of file descriptors to be monitored. - * events should be specified as a bitmask of events passed to poll(), e.g. - * POLLIN and/or POLLOUT. */ -int usbi_add_pollfd(struct libusb_context *ctx, int fd, short events) -{ - struct usbi_pollfd *ipollfd = malloc(sizeof(*ipollfd)); - if (!ipollfd) - return LIBUSB_ERROR_NO_MEM; - - usbi_dbg("add fd %d events %d", fd, events); - ipollfd->pollfd.fd = fd; - ipollfd->pollfd.events = events; - usbi_mutex_lock(&ctx->event_data_lock); - list_add_tail(&ipollfd->list, &ctx->ipollfds); - ctx->pollfds_cnt++; - usbi_fd_notification(ctx); - usbi_mutex_unlock(&ctx->event_data_lock); - - if (ctx->fd_added_cb) - ctx->fd_added_cb(fd, events, ctx->fd_cb_user_data); - return 0; -} - -/* Remove a file descriptor from the list of file descriptors to be polled. */ -void usbi_remove_pollfd(struct libusb_context *ctx, int fd) -{ - struct usbi_pollfd *ipollfd; - int found = 0; - - usbi_dbg("remove fd %d", fd); - usbi_mutex_lock(&ctx->event_data_lock); - list_for_each_entry(ipollfd, &ctx->ipollfds, list, struct usbi_pollfd) - if (ipollfd->pollfd.fd == fd) { - found = 1; - break; - } - - if (!found) { - usbi_dbg("couldn't find fd %d to remove", fd); - usbi_mutex_unlock(&ctx->event_data_lock); - return; - } - - list_del(&ipollfd->list); - list_add_tail(&ipollfd->list, &ctx->removed_ipollfds); - ctx->pollfds_cnt--; - usbi_fd_notification(ctx); - usbi_mutex_unlock(&ctx->event_data_lock); - - if (ctx->fd_removed_cb) - ctx->fd_removed_cb(fd, ctx->fd_cb_user_data); -} - -/** \ingroup libusb_poll - * Retrieve a list of file descriptors that should be polled by your main loop - * as src event sources. - * - * The returned list is NULL-terminated and should be freed with libusb_free_pollfds() - * when done. The actual list contents must not be touched. - * - * As file descriptors are a Unix-specific concept, this function is not - * available on Windows and will always return NULL. - * - * \param ctx the context to operate on, or NULL for the default context - * \returns a NULL-terminated list of libusb_pollfd structures - * \returns NULL on error - * \returns NULL on platforms where the functionality is not available - */ -DEFAULT_VISIBILITY -const struct libusb_pollfd ** LIBUSB_CALL libusb_get_pollfds( - libusb_context *ctx) -{ -#ifndef OS_WINDOWS - struct libusb_pollfd **ret = NULL; - struct usbi_pollfd *ipollfd; - size_t i = 0; - USBI_GET_CONTEXT(ctx); - - usbi_mutex_lock(&ctx->event_data_lock); - - ret = calloc(ctx->pollfds_cnt + 1, sizeof(struct libusb_pollfd *)); - if (!ret) - goto out; - - list_for_each_entry(ipollfd, &ctx->ipollfds, list, struct usbi_pollfd) - ret[i++] = (struct libusb_pollfd *) ipollfd; - ret[ctx->pollfds_cnt] = NULL; - -out: - usbi_mutex_unlock(&ctx->event_data_lock); - return (const struct libusb_pollfd **) ret; -#else - usbi_err(ctx, "external polling of src's internal descriptors "\ - "is not yet supported on Windows platforms"); - return NULL; -#endif -} - -/** \ingroup libusb_poll - * Free a list of libusb_pollfd structures. This should be called for all - * pollfd lists allocated with libusb_get_pollfds(). - * - * Since version 1.0.20, \ref LIBUSB_API_VERSION >= 0x01000104 - * - * It is legal to call this function with a NULL pollfd list. In this case, - * the function will simply do nothing. - * - * \param pollfds the list of libusb_pollfd structures to free - */ -void API_EXPORTED libusb_free_pollfds(const struct libusb_pollfd **pollfds) -{ - free((void *)pollfds); -} - -/* Backends may call this from handle_events to report disconnection of a - * device. This function ensures transfers get cancelled appropriately. - * Callers of this function must hold the events_lock. - */ -void usbi_handle_disconnect(struct libusb_device_handle *dev_handle) -{ - struct usbi_transfer *cur; - struct usbi_transfer *to_cancel; - - usbi_dbg("device %d.%d", - dev_handle->dev->bus_number, dev_handle->dev->device_address); - - /* terminate all pending transfers with the LIBUSB_TRANSFER_NO_DEVICE - * status code. - * - * when we find a transfer for this device on the list, there are two - * possible scenarios: - * 1. the transfer is currently in-flight, in which case we terminate the - * transfer here - * 2. the transfer has been added to the flying transfer list by - * libusb_submit_transfer, has failed to submit and - * libusb_submit_transfer is waiting for us to release the - * flying_transfers_lock to remove it, so we ignore it - */ - - while (1) { - to_cancel = NULL; - usbi_mutex_lock(&HANDLE_CTX(dev_handle)->flying_transfers_lock); - list_for_each_entry(cur, &HANDLE_CTX(dev_handle)->flying_transfers, list, struct usbi_transfer) - if (USBI_TRANSFER_TO_LIBUSB_TRANSFER(cur)->dev_handle == dev_handle) { - usbi_mutex_lock(&cur->lock); - if (cur->state_flags & USBI_TRANSFER_IN_FLIGHT) - to_cancel = cur; - usbi_mutex_unlock(&cur->lock); - - if (to_cancel) - break; - } - usbi_mutex_unlock(&HANDLE_CTX(dev_handle)->flying_transfers_lock); - - if (!to_cancel) - break; - - usbi_dbg("cancelling transfer %p from disconnect", - USBI_TRANSFER_TO_LIBUSB_TRANSFER(to_cancel)); - - usbi_mutex_lock(&to_cancel->lock); - usbi_backend.clear_transfer_priv(to_cancel); - usbi_mutex_unlock(&to_cancel->lock); - usbi_handle_transfer_completion(to_cancel, LIBUSB_TRANSFER_NO_DEVICE); - } - -} diff --git a/c8_libusb/src/libusb-1.0.def b/c8_libusb/src/libusb-1.0.def deleted file mode 100644 index 6eba4ff..0000000 --- a/c8_libusb/src/libusb-1.0.def +++ /dev/null @@ -1,178 +0,0 @@ -LIBRARY "libusb-1.0.dll" -EXPORTS - libusb_alloc_streams - libusb_alloc_streams@16 = libusb_alloc_streams - libusb_alloc_transfer - libusb_alloc_transfer@4 = libusb_alloc_transfer - libusb_attach_kernel_driver - libusb_attach_kernel_driver@8 = libusb_attach_kernel_driver - libusb_bulk_transfer - libusb_bulk_transfer@24 = libusb_bulk_transfer - libusb_cancel_transfer - libusb_cancel_transfer@4 = libusb_cancel_transfer - libusb_claim_interface - libusb_claim_interface@8 = libusb_claim_interface - libusb_clear_halt - libusb_clear_halt@8 = libusb_clear_halt - libusb_close - libusb_close@4 = libusb_close - libusb_control_transfer - libusb_control_transfer@32 = libusb_control_transfer - libusb_detach_kernel_driver - libusb_detach_kernel_driver@8 = libusb_detach_kernel_driver - libusb_dev_mem_alloc - libusb_dev_mem_alloc@8 = libusb_dev_mem_alloc - libusb_dev_mem_free - libusb_dev_mem_free@12 = libusb_dev_mem_free - libusb_error_name - libusb_error_name@4 = libusb_error_name - libusb_event_handler_active - libusb_event_handler_active@4 = libusb_event_handler_active - libusb_event_handling_ok - libusb_event_handling_ok@4 = libusb_event_handling_ok - libusb_exit - libusb_exit@4 = libusb_exit - libusb_free_bos_descriptor - libusb_free_bos_descriptor@4 = libusb_free_bos_descriptor - libusb_free_config_descriptor - libusb_free_config_descriptor@4 = libusb_free_config_descriptor - libusb_free_container_id_descriptor - libusb_free_container_id_descriptor@4 = libusb_free_container_id_descriptor - libusb_free_device_list - libusb_free_device_list@8 = libusb_free_device_list - libusb_free_pollfds - libusb_free_pollfds@4 = libusb_free_pollfds - libusb_free_ss_endpoint_companion_descriptor - libusb_free_ss_endpoint_companion_descriptor@4 = libusb_free_ss_endpoint_companion_descriptor - libusb_free_ss_usb_device_capability_descriptor - libusb_free_ss_usb_device_capability_descriptor@4 = libusb_free_ss_usb_device_capability_descriptor - libusb_free_streams - libusb_free_streams@12 = libusb_free_streams - libusb_free_transfer - libusb_free_transfer@4 = libusb_free_transfer - libusb_free_usb_2_0_extension_descriptor - libusb_free_usb_2_0_extension_descriptor@4 = libusb_free_usb_2_0_extension_descriptor - libusb_get_active_config_descriptor - libusb_get_active_config_descriptor@8 = libusb_get_active_config_descriptor - libusb_get_bos_descriptor - libusb_get_bos_descriptor@8 = libusb_get_bos_descriptor - libusb_get_bus_number - libusb_get_bus_number@4 = libusb_get_bus_number - libusb_get_config_descriptor - libusb_get_config_descriptor@12 = libusb_get_config_descriptor - libusb_get_config_descriptor_by_value - libusb_get_config_descriptor_by_value@12 = libusb_get_config_descriptor_by_value - libusb_get_configuration - libusb_get_configuration@8 = libusb_get_configuration - libusb_get_container_id_descriptor - libusb_get_container_id_descriptor@12 = libusb_get_container_id_descriptor - libusb_get_device - libusb_get_device@4 = libusb_get_device - libusb_get_device_address - libusb_get_device_address@4 = libusb_get_device_address - libusb_get_device_descriptor - libusb_get_device_descriptor@8 = libusb_get_device_descriptor - libusb_get_device_list - libusb_get_device_list@8 = libusb_get_device_list - libusb_get_device_speed - libusb_get_device_speed@4 = libusb_get_device_speed - libusb_get_max_iso_packet_size - libusb_get_max_iso_packet_size@8 = libusb_get_max_iso_packet_size - libusb_get_max_packet_size - libusb_get_max_packet_size@8 = libusb_get_max_packet_size - libusb_get_next_timeout - libusb_get_next_timeout@8 = libusb_get_next_timeout - libusb_get_parent - libusb_get_parent@4 = libusb_get_parent - libusb_get_pollfds - libusb_get_pollfds@4 = libusb_get_pollfds - libusb_get_port_number - libusb_get_port_number@4 = libusb_get_port_number - libusb_get_port_numbers - libusb_get_port_numbers@12 = libusb_get_port_numbers - libusb_get_port_path - libusb_get_port_path@16 = libusb_get_port_path - libusb_get_ss_endpoint_companion_descriptor - libusb_get_ss_endpoint_companion_descriptor@12 = libusb_get_ss_endpoint_companion_descriptor - libusb_get_ss_usb_device_capability_descriptor - libusb_get_ss_usb_device_capability_descriptor@12 = libusb_get_ss_usb_device_capability_descriptor - libusb_get_string_descriptor_ascii - libusb_get_string_descriptor_ascii@16 = libusb_get_string_descriptor_ascii - libusb_get_usb_2_0_extension_descriptor - libusb_get_usb_2_0_extension_descriptor@12 = libusb_get_usb_2_0_extension_descriptor - libusb_get_version - libusb_get_version@0 = libusb_get_version - libusb_handle_events - libusb_handle_events@4 = libusb_handle_events - libusb_handle_events_completed - libusb_handle_events_completed@8 = libusb_handle_events_completed - libusb_handle_events_locked - libusb_handle_events_locked@8 = libusb_handle_events_locked - libusb_handle_events_timeout - libusb_handle_events_timeout@8 = libusb_handle_events_timeout - libusb_handle_events_timeout_completed - libusb_handle_events_timeout_completed@12 = libusb_handle_events_timeout_completed - libusb_has_capability - libusb_has_capability@4 = libusb_has_capability - libusb_hotplug_deregister_callback - libusb_hotplug_deregister_callback@8 = libusb_hotplug_deregister_callback - libusb_hotplug_register_callback - libusb_hotplug_register_callback@36 = libusb_hotplug_register_callback - libusb_init - libusb_init@4 = libusb_init - libusb_interrupt_event_handler - libusb_interrupt_event_handler@4 = libusb_interrupt_event_handler - libusb_interrupt_transfer - libusb_interrupt_transfer@24 = libusb_interrupt_transfer - libusb_kernel_driver_active - libusb_kernel_driver_active@8 = libusb_kernel_driver_active - libusb_lock_event_waiters - libusb_lock_event_waiters@4 = libusb_lock_event_waiters - libusb_lock_events - libusb_lock_events@4 = libusb_lock_events - libusb_open - libusb_open@8 = libusb_open - libusb_open_device_with_vid_pid - libusb_open_device_with_vid_pid@12 = libusb_open_device_with_vid_pid - libusb_pollfds_handle_timeouts - libusb_pollfds_handle_timeouts@4 = libusb_pollfds_handle_timeouts - libusb_ref_device - libusb_ref_device@4 = libusb_ref_device - libusb_release_interface - libusb_release_interface@8 = libusb_release_interface - libusb_reset_device - libusb_reset_device@4 = libusb_reset_device - libusb_set_auto_detach_kernel_driver - libusb_set_auto_detach_kernel_driver@8 = libusb_set_auto_detach_kernel_driver - libusb_set_configuration - libusb_set_configuration@8 = libusb_set_configuration - libusb_set_debug - libusb_set_debug@8 = libusb_set_debug - libusb_set_log_cb - libusb_set_log_cb@12 = libusb_set_log_cb - libusb_set_interface_alt_setting - libusb_set_interface_alt_setting@12 = libusb_set_interface_alt_setting - libusb_set_option - _libusb_set_option = libusb_set_option - libusb_set_pollfd_notifiers - libusb_set_pollfd_notifiers@16 = libusb_set_pollfd_notifiers - libusb_setlocale - libusb_setlocale@4 = libusb_setlocale - libusb_strerror - libusb_strerror@4 = libusb_strerror - libusb_submit_transfer - libusb_submit_transfer@4 = libusb_submit_transfer - libusb_transfer_get_stream_id - libusb_transfer_get_stream_id@4 = libusb_transfer_get_stream_id - libusb_transfer_set_stream_id - libusb_transfer_set_stream_id@8 = libusb_transfer_set_stream_id - libusb_try_lock_events - libusb_try_lock_events@4 = libusb_try_lock_events - libusb_unlock_event_waiters - libusb_unlock_event_waiters@4 = libusb_unlock_event_waiters - libusb_unlock_events - libusb_unlock_events@4 = libusb_unlock_events - libusb_unref_device - libusb_unref_device@4 = libusb_unref_device - libusb_wait_for_event - libusb_wait_for_event@8 = libusb_wait_for_event diff --git a/c8_libusb/src/libusb-1.0.rc b/c8_libusb/src/libusb-1.0.rc deleted file mode 100644 index e7c2451..0000000 --- a/c8_libusb/src/libusb-1.0.rc +++ /dev/null @@ -1,61 +0,0 @@ -/* - * For Windows: input this file to the Resoure Compiler to produce a binary - * .res file. This is then embedded in the resultant library (like any other - * compilation object). - * The information can then be queried using standard APIs and can also be - * viewed with utilities such as Windows Explorer. - */ -#ifndef _WIN32_WCE -#include "winresrc.h" -#endif - -#include "version.h" -#ifndef LIBUSB_VERSIONSTRING -#define LU_STR(s) #s -#define LU_XSTR(s) LU_STR(s) -#if LIBUSB_NANO > 0 -#define LIBUSB_VERSIONSTRING \ - LU_XSTR(LIBUSB_MAJOR) "." LU_XSTR(LIBUSB_MINOR) "." \ - LU_XSTR(LIBUSB_MICRO) "." LU_XSTR(LIBUSB_NANO) LIBUSB_RC "\0" -#else -#define LIBUSB_VERSIONSTRING \ - LU_XSTR(LIBUSB_MAJOR) "." LU_XSTR(LIBUSB_MINOR) "." \ - LU_XSTR(LIBUSB_MICRO) LIBUSB_RC "\0" -#endif -#endif - -VS_VERSION_INFO VERSIONINFO - FILEVERSION LIBUSB_MAJOR,LIBUSB_MINOR,LIBUSB_MICRO,LIBUSB_NANO - PRODUCTVERSION LIBUSB_MAJOR,LIBUSB_MINOR,LIBUSB_MICRO,LIBUSB_NANO - FILEFLAGSMASK 0x3fL -#ifdef _DEBUG - FILEFLAGS 0x1L -#else - FILEFLAGS 0x0L -#endif - FILEOS 0x40004L - FILETYPE 0x2L - FILESUBTYPE 0x0L -BEGIN - BLOCK "StringFileInfo" - BEGIN - BLOCK "040904b0" - BEGIN - VALUE "CompanyName", "src.info\0" - VALUE "FileDescription", "C library for writing portable USB drivers in userspace\0" - VALUE "FileVersion", LIBUSB_VERSIONSTRING - VALUE "InternalName", "src\0" - VALUE "LegalCopyright", "See individual source files, GNU LGPL v2.1 or later.\0" - VALUE "LegalTrademarks", "http://www.gnu.org/licenses/lgpl-2.1.html\0" - VALUE "OriginalFilename", "src-1.0.dll\0" - VALUE "PrivateBuild", "\0" - VALUE "ProductName", "src-1.0\0" - VALUE "ProductVersion", LIBUSB_VERSIONSTRING - VALUE "SpecialBuild", "\0" - END - END - BLOCK "VarFileInfo" - BEGIN - VALUE "Translation", 0x409, 1200 - END -END diff --git a/c8_libusb/src/libusbi.h b/c8_libusb/src/libusbi.h deleted file mode 100644 index 891b170..0000000 --- a/c8_libusb/src/libusbi.h +++ /dev/null @@ -1,1210 +0,0 @@ -/* - * Internal header for src - * Copyright © 2007-2009 Daniel Drake - * Copyright © 2001 Johannes Erdfelt - * Copyright © 2019 Nathan Hjelm - * Copyright © 2019 Google LLC. All rights reserved. - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#ifndef LIBUSBI_H -#define LIBUSBI_H - -#include "libusb_config.h" - -#include -#include -#include -#include -#include -#include -#ifdef HAVE_POLL_H -#include -#endif -#ifdef HAVE_MISSING_H -#include -#endif - -#include "libusb.h" -#include "version.h" - -/* Attribute to ensure that a structure member is aligned to a natural - * pointer alignment. Used for os_priv member. */ -#if defined(_MSC_VER) -#if defined(_WIN64) -#define PTR_ALIGNED __declspec(align(8)) -#else -#define PTR_ALIGNED __declspec(align(4)) -#endif -#elif defined(__GNUC__) && (__GNUC__ >= 3) -#define PTR_ALIGNED __attribute__((aligned(sizeof(void *)))) -#else -#define PTR_ALIGNED -#endif - -/* Inside the src code, mark all public functions as follows: - * return_type API_EXPORTED function_name(params) { ... } - * But if the function returns a pointer, mark it as follows: - * DEFAULT_VISIBILITY return_type * LIBUSB_CALL function_name(params) { ... } - * In the src public header, mark all declarations as: - * return_type LIBUSB_CALL function_name(params); - */ -#define API_EXPORTED LIBUSB_CALL DEFAULT_VISIBILITY - -/* Macro to decorate printf-like functions, in order to get - * compiler warnings about format string mistakes. - */ -#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 2) -#define USBI_PRINTFLIKE(formatarg, firstvararg) \ - __attribute__((__format__ (__printf__, formatarg, firstvararg))) -#else -#define USBI_PRINTFLIKE(formatarg, firstvararg) -#endif - -#ifdef __cplusplus -extern "C" { -#endif - -#define DEVICE_DESC_LENGTH 18 - -#define USB_MAXENDPOINTS 32 -#define USB_MAXINTERFACES 32 -#define USB_MAXCONFIG 8 - -/* Backend specific capabilities */ -#define USBI_CAP_HAS_HID_ACCESS 0x00010000 -#define USBI_CAP_SUPPORTS_DETACH_KERNEL_DRIVER 0x00020000 - -/* Maximum number of bytes in a log line */ -#define USBI_MAX_LOG_LEN 1024 -/* Terminator for log lines */ -#define USBI_LOG_LINE_END "\n" - -/* The following is used to silence warnings for unused variables */ -#define UNUSED(var) do { (void)(var); } while(0) - -#if !defined(ARRAYSIZE) -#define ARRAYSIZE(array) (sizeof(array) / sizeof(array[0])) -#endif - -struct list_head { - struct list_head *prev, *next; -}; - -/* Get an entry from the list - * ptr - the address of this list_head element in "type" - * type - the data type that contains "member" - * member - the list_head element in "type" - */ -#define list_entry(ptr, type, member) \ - ((type *)((uintptr_t)(ptr) - (uintptr_t)offsetof(type, member))) - -#define list_first_entry(ptr, type, member) \ - list_entry((ptr)->next, type, member) - -/* Get each entry from a list - * pos - A structure pointer has a "member" element - * head - list head - * member - the list_head element in "pos" - * type - the type of the first parameter - */ -#define list_for_each_entry(pos, head, member, type) \ - for (pos = list_entry((head)->next, type, member); \ - &pos->member != (head); \ - pos = list_entry(pos->member.next, type, member)) - -#define list_for_each_entry_safe(pos, n, head, member, type) \ - for (pos = list_entry((head)->next, type, member), \ - n = list_entry(pos->member.next, type, member); \ - &pos->member != (head); \ - pos = n, n = list_entry(n->member.next, type, member)) - -#define list_empty(entry) ((entry)->next == (entry)) - -static inline void list_init(struct list_head *entry) -{ - entry->prev = entry->next = entry; -} - -static inline void list_add(struct list_head *entry, struct list_head *head) -{ - entry->next = head->next; - entry->prev = head; - - head->next->prev = entry; - head->next = entry; -} - -static inline void list_add_tail(struct list_head *entry, - struct list_head *head) -{ - entry->next = head; - entry->prev = head->prev; - - head->prev->next = entry; - head->prev = entry; -} - -static inline void list_del(struct list_head *entry) -{ - entry->next->prev = entry->prev; - entry->prev->next = entry->next; - entry->next = entry->prev = NULL; -} - -static inline void list_cut(struct list_head *list, struct list_head *head) -{ - if (list_empty(head)) - return; - - list->next = head->next; - list->next->prev = list; - list->prev = head->prev; - list->prev->next = list; - - list_init(head); -} - -static inline void *usbi_reallocf(void *ptr, size_t size) -{ - void *ret = realloc(ptr, size); - if (!ret) - free(ptr); - return ret; -} - -#define container_of(ptr, type, member) ({ \ - const typeof( ((type *)0)->member ) *mptr = (ptr); \ - (type *)( (char *)mptr - offsetof(type,member) );}) - -#ifndef CLAMP -#define CLAMP(val, min, max) ((val) < (min) ? (min) : ((val) > (max) ? (max) : (val))) -#endif -#ifndef MIN -#define MIN(a, b) ((a) < (b) ? (a) : (b)) -#endif -#ifndef MAX -#define MAX(a, b) ((a) > (b) ? (a) : (b)) -#endif - -#define TIMESPEC_IS_SET(ts) ((ts)->tv_sec != 0 || (ts)->tv_nsec != 0) - -#if defined(_WIN32) || defined(__CYGWIN__) || defined(_WIN32_WCE) -#define TIMEVAL_TV_SEC_TYPE long -#else -#define TIMEVAL_TV_SEC_TYPE time_t -#endif - -/* Some platforms don't have this define */ -#ifndef TIMESPEC_TO_TIMEVAL -#define TIMESPEC_TO_TIMEVAL(tv, ts) \ - do { \ - (tv)->tv_sec = (TIMEVAL_TV_SEC_TYPE) (ts)->tv_sec; \ - (tv)->tv_usec = (ts)->tv_nsec / 1000; \ - } while (0) -#endif - -#ifdef ENABLE_LOGGING - -#if defined(_MSC_VER) && (_MSC_VER < 1900) -#define snprintf usbi_snprintf -#define vsnprintf usbi_vsnprintf -int usbi_snprintf(char *dst, size_t size, const char *format, ...); -int usbi_vsnprintf(char *dst, size_t size, const char *format, va_list ap); -#define LIBUSB_PRINTF_WIN32 -#endif /* defined(_MSC_VER) && (_MSC_VER < 1900) */ - -void usbi_log(struct libusb_context *ctx, enum libusb_log_level level, - const char *function, const char *format, ...) USBI_PRINTFLIKE(4, 5); - -void usbi_log_v(struct libusb_context *ctx, enum libusb_log_level level, - const char *function, const char *format, va_list args) USBI_PRINTFLIKE(4, 0); - -#if !defined(_MSC_VER) || (_MSC_VER >= 1400) - -#define _usbi_log(ctx, level, ...) usbi_log(ctx, level, __FUNCTION__, __VA_ARGS__) - -#define usbi_err(ctx, ...) _usbi_log(ctx, LIBUSB_LOG_LEVEL_ERROR, __VA_ARGS__) -#define usbi_warn(ctx, ...) _usbi_log(ctx, LIBUSB_LOG_LEVEL_WARNING, __VA_ARGS__) -#define usbi_info(ctx, ...) _usbi_log(ctx, LIBUSB_LOG_LEVEL_INFO, __VA_ARGS__) -#define usbi_dbg(...) _usbi_log(NULL, LIBUSB_LOG_LEVEL_DEBUG, __VA_ARGS__) - -#else /* !defined(_MSC_VER) || (_MSC_VER >= 1400) */ - -#define LOG_BODY(ctxt, level) \ -{ \ - va_list args; \ - va_start(args, format); \ - usbi_log_v(ctxt, level, "", format, args); \ - va_end(args); \ -} - -static inline void usbi_err(struct libusb_context *ctx, const char *format, ...) - LOG_BODY(ctx, LIBUSB_LOG_LEVEL_ERROR) -static inline void usbi_warn(struct libusb_context *ctx, const char *format, ...) - LOG_BODY(ctx, LIBUSB_LOG_LEVEL_WARNING) -static inline void usbi_info(struct libusb_context *ctx, const char *format, ...) - LOG_BODY(ctx, LIBUSB_LOG_LEVEL_INFO) -static inline void usbi_dbg(const char *format, ...) - LOG_BODY(NULL, LIBUSB_LOG_LEVEL_DEBUG) - -#endif /* !defined(_MSC_VER) || (_MSC_VER >= 1400) */ - -#else /* ENABLE_LOGGING */ - -#define usbi_err(ctx, ...) do { (void)ctx; } while (0) -#define usbi_warn(ctx, ...) do { (void)ctx; } while (0) -#define usbi_info(ctx, ...) do { (void)ctx; } while (0) -#define usbi_dbg(...) do {} while (0) - -#endif /* ENABLE_LOGGING */ - -#define USBI_GET_CONTEXT(ctx) \ - do { \ - if (!(ctx)) \ - (ctx) = usbi_default_context; \ - } while(0) - -#define DEVICE_CTX(dev) ((dev)->ctx) -#define HANDLE_CTX(handle) (DEVICE_CTX((handle)->dev)) -#define TRANSFER_CTX(transfer) (HANDLE_CTX((transfer)->dev_handle)) -#define ITRANSFER_CTX(transfer) \ - (TRANSFER_CTX(USBI_TRANSFER_TO_LIBUSB_TRANSFER(transfer))) - -#define IS_EPIN(ep) (0 != ((ep) & LIBUSB_ENDPOINT_IN)) -#define IS_EPOUT(ep) (!IS_EPIN(ep)) -#define IS_XFERIN(xfer) (0 != ((xfer)->endpoint & LIBUSB_ENDPOINT_IN)) -#define IS_XFEROUT(xfer) (!IS_XFERIN(xfer)) - -/* Internal abstraction for thread synchronization */ -#if defined(THREADS_POSIX) -#include "os/threads_posix.h" -#elif defined(OS_WINDOWS) || defined(OS_WINCE) -#include "os/threads_windows.h" -#endif - -extern struct libusb_context *usbi_default_context; - -/* Forward declaration for use in context (fully defined inside poll abstraction) */ -struct pollfd; - -struct libusb_context { -#if defined(ENABLE_LOGGING) && !defined(ENABLE_DEBUG_LOGGING) - enum libusb_log_level debug; - int debug_fixed; - libusb_log_cb log_handler; -#endif - - /* internal event pipe, used for signalling occurrence of an internal event. */ - int event_pipe[2]; - - struct list_head usb_devs; - usbi_mutex_t usb_devs_lock; - - /* A list of open handles. Backends are free to traverse this if required. - */ - struct list_head open_devs; - usbi_mutex_t open_devs_lock; - - /* A list of registered hotplug callbacks */ - struct list_head hotplug_cbs; - libusb_hotplug_callback_handle next_hotplug_cb_handle; - usbi_mutex_t hotplug_cbs_lock; - - /* this is a list of in-flight transfer handles, sorted by timeout - * expiration. URBs to timeout the soonest are placed at the beginning of - * the list, URBs that will time out later are placed after, and urbs with - * infinite timeout are always placed at the very end. */ - struct list_head flying_transfers; - /* Note paths taking both this and usbi_transfer->lock must always - * take this lock first */ - usbi_mutex_t flying_transfers_lock; - - /* user callbacks for pollfd changes */ - libusb_pollfd_added_cb fd_added_cb; - libusb_pollfd_removed_cb fd_removed_cb; - void *fd_cb_user_data; - - /* ensures that only one thread is handling events at any one time */ - usbi_mutex_t events_lock; - - /* used to see if there is an active thread doing event handling */ - int event_handler_active; - - /* A thread-local storage key to track which thread is performing event - * handling */ - usbi_tls_key_t event_handling_key; - - /* used to wait for event completion in threads other than the one that is - * event handling */ - usbi_mutex_t event_waiters_lock; - usbi_cond_t event_waiters_cond; - - /* A lock to protect internal context event data. */ - usbi_mutex_t event_data_lock; - - /* A bitmask of flags that are set to indicate specific events that need to - * be handled. Protected by event_data_lock. */ - unsigned int event_flags; - - /* A counter that is set when we want to interrupt and prevent event handling, - * in order to safely close a device. Protected by event_data_lock. */ - unsigned int device_close; - - /* list and count of poll fds and an array of poll fd structures that is - * (re)allocated as necessary prior to polling. Protected by event_data_lock. */ - struct list_head ipollfds; - /* list of pollfds that have been removed. keeps track of pollfd changes - * between the poll call and */ - struct list_head removed_ipollfds; - struct pollfd *pollfds; - POLL_NFDS_TYPE pollfds_cnt; - - /* A list of pending hotplug messages. Protected by event_data_lock. */ - struct list_head hotplug_msgs; - - /* A list of pending completed transfers. Protected by event_data_lock. */ - struct list_head completed_transfers; - -#ifdef USBI_TIMERFD_AVAILABLE - /* used for timeout handling, if supported by OS. - * this timerfd is maintained to trigger on the next pending timeout */ - int timerfd; -#endif - - struct list_head list; - - PTR_ALIGNED unsigned char os_priv[ZERO_SIZED_ARRAY]; -}; - -enum usbi_event_flags { - /* The list of pollfds has been modified */ - USBI_EVENT_POLLFDS_MODIFIED = 1U << 0, - - /* The user has interrupted the event handler */ - USBI_EVENT_USER_INTERRUPT = 1U << 1, - - /* A hotplug callback deregistration is pending */ - USBI_EVENT_HOTPLUG_CB_DEREGISTERED = 1U << 2, -}; - -/* Macros for managing event handling state */ -#define usbi_handling_events(ctx) \ - (usbi_tls_key_get((ctx)->event_handling_key) != NULL) - -#define usbi_start_event_handling(ctx) \ - usbi_tls_key_set((ctx)->event_handling_key, ctx) - -#define usbi_end_event_handling(ctx) \ - usbi_tls_key_set((ctx)->event_handling_key, NULL) - -/* Update the following macro if new event sources are added */ -#define usbi_pending_events(ctx) \ - ((ctx)->event_flags || (ctx)->device_close \ - || !list_empty(&(ctx)->hotplug_msgs) || !list_empty(&(ctx)->completed_transfers)) - -#ifdef USBI_TIMERFD_AVAILABLE -#define usbi_using_timerfd(ctx) ((ctx)->timerfd >= 0) -#else -#define usbi_using_timerfd(ctx) (0) -#endif - -struct libusb_device { - /* lock protects refcnt, everything else is finalized at initialization - * time */ - usbi_mutex_t lock; - int refcnt; - - struct libusb_context *ctx; - - uint8_t bus_number; - uint8_t port_number; - struct libusb_device* parent_dev; - uint8_t device_address; - uint8_t num_configurations; - enum libusb_speed speed; - - struct list_head list; - unsigned long session_data; - - struct libusb_device_descriptor device_descriptor; - int attached; - - PTR_ALIGNED unsigned char os_priv[ZERO_SIZED_ARRAY]; -}; - -struct libusb_device_handle { - /* lock protects claimed_interfaces */ - usbi_mutex_t lock; - unsigned long claimed_interfaces; - - struct list_head list; - struct libusb_device *dev; - int auto_detach_kernel_driver; - - PTR_ALIGNED unsigned char os_priv[ZERO_SIZED_ARRAY]; -}; - -enum { - USBI_CLOCK_MONOTONIC, - USBI_CLOCK_REALTIME -}; - -/* in-memory transfer layout: - * - * 1. struct usbi_transfer - * 2. struct libusb_transfer (which includes iso packets) [variable size] - * 3. os private data [variable size] - * - * from a libusb_transfer, you can get the usbi_transfer by rewinding the - * appropriate number of bytes. - * the usbi_transfer includes the number of allocated packets, so you can - * determine the size of the transfer and hence the start and length of the - * OS-private data. - */ - -struct usbi_transfer { - int num_iso_packets; - struct list_head list; - struct list_head completed_list; - struct timeval timeout; - int transferred; - uint32_t stream_id; - uint8_t state_flags; /* Protected by usbi_transfer->lock */ - uint8_t timeout_flags; /* Protected by the flying_stransfers_lock */ - - /* this lock is held during libusb_submit_transfer() and - * libusb_cancel_transfer() (allowing the OS backend to prevent duplicate - * cancellation, submission-during-cancellation, etc). the OS backend - * should also take this lock in the handle_events path, to prevent the user - * cancelling the transfer from another thread while you are processing - * its completion (presumably there would be races within your OS backend - * if this were possible). - * Note paths taking both this and the flying_transfers_lock must - * always take the flying_transfers_lock first */ - usbi_mutex_t lock; -}; - -enum usbi_transfer_state_flags { - /* Transfer successfully submitted by backend */ - USBI_TRANSFER_IN_FLIGHT = 1U << 0, - - /* Cancellation was requested via libusb_cancel_transfer() */ - USBI_TRANSFER_CANCELLING = 1U << 1, - - /* Operation on the transfer failed because the device disappeared */ - USBI_TRANSFER_DEVICE_DISAPPEARED = 1U << 2, -}; - -enum usbi_transfer_timeout_flags { - /* Set by backend submit_transfer() if the OS handles timeout */ - USBI_TRANSFER_OS_HANDLES_TIMEOUT = 1U << 0, - - /* The transfer timeout has been handled */ - USBI_TRANSFER_TIMEOUT_HANDLED = 1U << 1, - - /* The transfer timeout was successfully processed */ - USBI_TRANSFER_TIMED_OUT = 1U << 2, -}; - -#define USBI_TRANSFER_TO_LIBUSB_TRANSFER(transfer) \ - ((struct libusb_transfer *)(((unsigned char *)(transfer)) \ - + sizeof(struct usbi_transfer))) -#define LIBUSB_TRANSFER_TO_USBI_TRANSFER(transfer) \ - ((struct usbi_transfer *)(((unsigned char *)(transfer)) \ - - sizeof(struct usbi_transfer))) - -static inline void *usbi_transfer_get_os_priv(struct usbi_transfer *transfer) -{ - assert(transfer->num_iso_packets >= 0); - return ((unsigned char *)transfer) + sizeof(struct usbi_transfer) - + sizeof(struct libusb_transfer) - + ((size_t)transfer->num_iso_packets - * sizeof(struct libusb_iso_packet_descriptor)); -} - -/* bus structures */ - -/* All standard descriptors have these 2 fields in common */ -struct usb_descriptor_header { - uint8_t bLength; - uint8_t bDescriptorType; -}; - -/* shared data and functions */ - -int usbi_io_init(struct libusb_context *ctx); -void usbi_io_exit(struct libusb_context *ctx); - -struct libusb_device *usbi_alloc_device(struct libusb_context *ctx, - unsigned long session_id); -struct libusb_device *usbi_get_device_by_session_id(struct libusb_context *ctx, - unsigned long session_id); -int usbi_sanitize_device(struct libusb_device *dev); -void usbi_handle_disconnect(struct libusb_device_handle *dev_handle); - -int usbi_handle_transfer_completion(struct usbi_transfer *itransfer, - enum libusb_transfer_status status); -int usbi_handle_transfer_cancellation(struct usbi_transfer *transfer); -void usbi_signal_transfer_completion(struct usbi_transfer *transfer); - -int usbi_parse_descriptor(const unsigned char *source, const char *descriptor, - void *dest, int host_endian); -int usbi_device_cache_descriptor(libusb_device *dev); -int usbi_get_config_index_by_value(struct libusb_device *dev, - uint8_t bConfigurationValue, int *idx); - -void usbi_connect_device (struct libusb_device *dev); -void usbi_disconnect_device (struct libusb_device *dev); - -int usbi_signal_event(struct libusb_context *ctx); -int usbi_clear_event(struct libusb_context *ctx); - -/* Internal abstraction for poll (needs struct usbi_transfer on Windows) */ -#if defined(OS_LINUX) || defined(OS_DARWIN) || defined(OS_OPENBSD) || defined(OS_NETBSD) ||\ - defined(OS_HAIKU) || defined(OS_SUNOS) -#include -#include "os/poll_posix.h" -#elif defined(OS_WINDOWS) || defined(OS_WINCE) -#include "os/poll_windows.h" -#endif - -struct usbi_pollfd { - /* must come first */ - struct libusb_pollfd pollfd; - - struct list_head list; -}; - -int usbi_add_pollfd(struct libusb_context *ctx, int fd, short events); -void usbi_remove_pollfd(struct libusb_context *ctx, int fd); - -/* device discovery */ - -/* we traverse usbfs without knowing how many devices we are going to find. - * so we create this discovered_devs model which is similar to a linked-list - * which grows when required. it can be freed once discovery has completed, - * eliminating the need for a list node in the libusb_device structure - * itself. */ -struct discovered_devs { - size_t len; - size_t capacity; - struct libusb_device *devices[ZERO_SIZED_ARRAY]; -}; - -struct discovered_devs *discovered_devs_append( - struct discovered_devs *discdevs, struct libusb_device *dev); - -/* OS abstraction */ - -/* This is the interface that OS backends need to implement. - * All fields are mandatory, except ones explicitly noted as optional. */ -struct usbi_os_backend { - /* A human-readable name for your backend, e.g. "Linux usbfs" */ - const char *name; - - /* Binary mask for backend specific capabilities */ - uint32_t caps; - - /* Perform initialization of your backend. You might use this function - * to determine specific capabilities of the system, allocate required - * data structures for later, etc. - * - * This function is called when a src user initializes the library - * prior to use. - * - * Return 0 on success, or a LIBUSB_ERROR code on failure. - */ - int (*init)(struct libusb_context *ctx); - - /* Deinitialization. Optional. This function should destroy anything - * that was set up by init. - * - * This function is called when the user deinitializes the library. - */ - void (*exit)(struct libusb_context *ctx); - - /* Set a backend-specific option. Optional. - * - * This function is called when the user calls libusb_set_option() and - * the option is not handled by the core library. - * - * Return 0 on success, or a LIBUSB_ERROR code on failure. - */ - int (*set_option)(struct libusb_context *ctx, enum libusb_option option, - va_list args); - - /* Enumerate all the USB devices on the system, returning them in a list - * of discovered devices. - * - * Your implementation should enumerate all devices on the system, - * regardless of whether they have been seen before or not. - * - * When you have found a device, compute a session ID for it. The session - * ID should uniquely represent that particular device for that particular - * connection session since boot (i.e. if you disconnect and reconnect a - * device immediately after, it should be assigned a different session ID). - * If your OS cannot provide a unique session ID as described above, - * presenting a session ID of (bus_number << 8 | device_address) should - * be sufficient. Bus numbers and device addresses wrap and get reused, - * but that is an unlikely case. - * - * After computing a session ID for a device, call - * usbi_get_device_by_session_id(). This function checks if src already - * knows about the device, and if so, it provides you with a reference - * to a libusb_device structure for it. - * - * If usbi_get_device_by_session_id() returns NULL, it is time to allocate - * a new device structure for the device. Call usbi_alloc_device() to - * obtain a new libusb_device structure with reference count 1. Populate - * the bus_number and device_address attributes of the new device, and - * perform any other internal backend initialization you need to do. At - * this point, you should be ready to provide device descriptors and so - * on through the get_*_descriptor functions. Finally, call - * usbi_sanitize_device() to perform some final sanity checks on the - * device. Assuming all of the above succeeded, we can now continue. - * If any of the above failed, remember to unreference the device that - * was returned by usbi_alloc_device(). - * - * At this stage we have a populated libusb_device structure (either one - * that was found earlier, or one that we have just allocated and - * populated). This can now be added to the discovered devices list - * using discovered_devs_append(). Note that discovered_devs_append() - * may reallocate the list, returning a new location for it, and also - * note that reallocation can fail. Your backend should handle these - * error conditions appropriately. - * - * This function should not generate any bus I/O and should not block. - * If I/O is required (e.g. reading the active configuration value), it is - * OK to ignore these suggestions :) - * - * This function is executed when the user wishes to retrieve a list - * of USB devices connected to the system. - * - * If the backend has hotplug support, this function is not used! - * - * Return 0 on success, or a LIBUSB_ERROR code on failure. - */ - int (*get_device_list)(struct libusb_context *ctx, - struct discovered_devs **discdevs); - - /* Apps which were written before hotplug support, may listen for - * hotplug events on their own and call libusb_get_device_list on - * device addition. In this case libusb_get_device_list will likely - * return a list without the new device in there, as the hotplug - * event thread will still be busy enumerating the device, which may - * take a while, or may not even have seen the event yet. - * - * To avoid this libusb_get_device_list will call this optional - * function for backends with hotplug support before copying - * ctx->usb_devs to the user. In this function the backend should - * ensure any pending hotplug events are fully processed before - * returning. - * - * Optional, should be implemented by backends with hotplug support. - */ - void (*hotplug_poll)(void); - - /* Wrap a platform-specific device handle for I/O and other USB - * operations. The device handle is preallocated for you. - * - * Your backend should allocate any internal resources required for I/O - * and other operations so that those operations can happen (hopefully) - * without hiccup. This is also a good place to inform src that it - * should monitor certain file descriptors related to this device - - * see the usbi_add_pollfd() function. - * - * Your backend should also initialize the device structure - * (dev_handle->dev), which is NULL at the beginning of the call. - * - * This function should not generate any bus I/O and should not block. - * - * This function is called when the user attempts to wrap an existing - * platform-specific device handle for a device. - * - * Return: - * - 0 on success - * - LIBUSB_ERROR_ACCESS if the user has insufficient permissions - * - another LIBUSB_ERROR code on other failure - * - * Do not worry about freeing the handle on failed open, the upper layers - * do this for you. - */ - int (*wrap_sys_device)(struct libusb_context *ctx, - struct libusb_device_handle *dev_handle, intptr_t sys_dev); - - /* Open a device for I/O and other USB operations. The device handle - * is preallocated for you, you can retrieve the device in question - * through handle->dev. - * - * Your backend should allocate any internal resources required for I/O - * and other operations so that those operations can happen (hopefully) - * without hiccup. This is also a good place to inform src that it - * should monitor certain file descriptors related to this device - - * see the usbi_add_pollfd() function. - * - * This function should not generate any bus I/O and should not block. - * - * This function is called when the user attempts to obtain a device - * handle for a device. - * - * Return: - * - 0 on success - * - LIBUSB_ERROR_ACCESS if the user has insufficient permissions - * - LIBUSB_ERROR_NO_DEVICE if the device has been disconnected since - * discovery - * - another LIBUSB_ERROR code on other failure - * - * Do not worry about freeing the handle on failed open, the upper layers - * do this for you. - */ - int (*open)(struct libusb_device_handle *dev_handle); - - /* Close a device such that the handle cannot be used again. Your backend - * should destroy any resources that were allocated in the open path. - * This may also be a good place to call usbi_remove_pollfd() to inform - * src of any file descriptors associated with this device that should - * no longer be monitored. - * - * This function is called when the user closes a device handle. - */ - void (*close)(struct libusb_device_handle *dev_handle); - - /* Retrieve the device descriptor from a device. - * - * The descriptor should be retrieved from memory, NOT via bus I/O to the - * device. This means that you may have to cache it in a private structure - * during get_device_list enumeration. Alternatively, you may be able - * to retrieve it from a kernel interface (some Linux setups can do this) - * still without generating bus I/O. - * - * This function is expected to write DEVICE_DESC_LENGTH (18) bytes into - * buffer, which is guaranteed to be big enough. - * - * This function is called when sanity-checking a device before adding - * it to the list of discovered devices, and also when the user requests - * to read the device descriptor. - * - * This function is expected to return the descriptor in bus-endian format - * (LE). If it returns the multi-byte values in host-endian format, - * set the host_endian output parameter to "1". - * - * Return 0 on success or a LIBUSB_ERROR code on failure. - */ - int (*get_device_descriptor)(struct libusb_device *device, - unsigned char *buffer, int *host_endian); - - /* Get the ACTIVE configuration descriptor for a device. - * - * The descriptor should be retrieved from memory, NOT via bus I/O to the - * device. This means that you may have to cache it in a private structure - * during get_device_list enumeration. You may also have to keep track - * of which configuration is active when the user changes it. - * - * This function is expected to write len bytes of data into buffer, which - * is guaranteed to be big enough. If you can only do a partial write, - * return an error code. - * - * This function is expected to return the descriptor in bus-endian format - * (LE). If it returns the multi-byte values in host-endian format, - * set the host_endian output parameter to "1". - * - * Return: - * - 0 on success - * - LIBUSB_ERROR_NOT_FOUND if the device is in unconfigured state - * - another LIBUSB_ERROR code on other failure - */ - int (*get_active_config_descriptor)(struct libusb_device *device, - unsigned char *buffer, size_t len, int *host_endian); - - /* Get a specific configuration descriptor for a device. - * - * The descriptor should be retrieved from memory, NOT via bus I/O to the - * device. This means that you may have to cache it in a private structure - * during get_device_list enumeration. - * - * The requested descriptor is expressed as a zero-based index (i.e. 0 - * indicates that we are requesting the first descriptor). The index does - * not (necessarily) equal the bConfigurationValue of the configuration - * being requested. - * - * This function is expected to write len bytes of data into buffer, which - * is guaranteed to be big enough. If you can only do a partial write, - * return an error code. - * - * This function is expected to return the descriptor in bus-endian format - * (LE). If it returns the multi-byte values in host-endian format, - * set the host_endian output parameter to "1". - * - * Return the length read on success or a LIBUSB_ERROR code on failure. - */ - int (*get_config_descriptor)(struct libusb_device *device, - uint8_t config_index, unsigned char *buffer, size_t len, - int *host_endian); - - /* Like get_config_descriptor but then by bConfigurationValue instead - * of by index. - * - * Optional, if not present the core will call get_config_descriptor - * for all configs until it finds the desired bConfigurationValue. - * - * Returns a pointer to the raw-descriptor in *buffer, this memory - * is valid as long as device is valid. - * - * Returns the length of the returned raw-descriptor on success, - * or a LIBUSB_ERROR code on failure. - */ - int (*get_config_descriptor_by_value)(struct libusb_device *device, - uint8_t bConfigurationValue, unsigned char **buffer, - int *host_endian); - - /* Get the bConfigurationValue for the active configuration for a device. - * Optional. This should only be implemented if you can retrieve it from - * cache (don't generate I/O). - * - * If you cannot retrieve this from cache, either do not implement this - * function, or return LIBUSB_ERROR_NOT_SUPPORTED. This will cause - * src to retrieve the information through a standard control transfer. - * - * This function must be non-blocking. - * Return: - * - 0 on success - * - LIBUSB_ERROR_NO_DEVICE if the device has been disconnected since it - * was opened - * - LIBUSB_ERROR_NOT_SUPPORTED if the value cannot be retrieved without - * blocking - * - another LIBUSB_ERROR code on other failure. - */ - int (*get_configuration)(struct libusb_device_handle *dev_handle, int *config); - - /* Set the active configuration for a device. - * - * A configuration value of -1 should put the device in unconfigured state. - * - * This function can block. - * - * Return: - * - 0 on success - * - LIBUSB_ERROR_NOT_FOUND if the configuration does not exist - * - LIBUSB_ERROR_BUSY if interfaces are currently claimed (and hence - * configuration cannot be changed) - * - LIBUSB_ERROR_NO_DEVICE if the device has been disconnected since it - * was opened - * - another LIBUSB_ERROR code on other failure. - */ - int (*set_configuration)(struct libusb_device_handle *dev_handle, int config); - - /* Claim an interface. When claimed, the application can then perform - * I/O to an interface's endpoints. - * - * This function should not generate any bus I/O and should not block. - * Interface claiming is a logical operation that simply ensures that - * no other drivers/applications are using the interface, and after - * claiming, no other drivers/applications can use the interface because - * we now "own" it. - * - * Return: - * - 0 on success - * - LIBUSB_ERROR_NOT_FOUND if the interface does not exist - * - LIBUSB_ERROR_BUSY if the interface is in use by another driver/app - * - LIBUSB_ERROR_NO_DEVICE if the device has been disconnected since it - * was opened - * - another LIBUSB_ERROR code on other failure - */ - int (*claim_interface)(struct libusb_device_handle *dev_handle, int interface_number); - - /* Release a previously claimed interface. - * - * This function should also generate a SET_INTERFACE control request, - * resetting the alternate setting of that interface to 0. It's OK for - * this function to block as a result. - * - * You will only ever be asked to release an interface which was - * successfully claimed earlier. - * - * Return: - * - 0 on success - * - LIBUSB_ERROR_NO_DEVICE if the device has been disconnected since it - * was opened - * - another LIBUSB_ERROR code on other failure - */ - int (*release_interface)(struct libusb_device_handle *dev_handle, int interface_number); - - /* Set the alternate setting for an interface. - * - * You will only ever be asked to set the alternate setting for an - * interface which was successfully claimed earlier. - * - * It's OK for this function to block. - * - * Return: - * - 0 on success - * - LIBUSB_ERROR_NOT_FOUND if the alternate setting does not exist - * - LIBUSB_ERROR_NO_DEVICE if the device has been disconnected since it - * was opened - * - another LIBUSB_ERROR code on other failure - */ - int (*set_interface_altsetting)(struct libusb_device_handle *dev_handle, - int interface_number, int altsetting); - - /* Clear a halt/stall condition on an endpoint. - * - * It's OK for this function to block. - * - * Return: - * - 0 on success - * - LIBUSB_ERROR_NOT_FOUND if the endpoint does not exist - * - LIBUSB_ERROR_NO_DEVICE if the device has been disconnected since it - * was opened - * - another LIBUSB_ERROR code on other failure - */ - int (*clear_halt)(struct libusb_device_handle *dev_handle, - unsigned char endpoint); - - /* Perform a USB port reset to reinitialize a device. - * - * If possible, the device handle should still be usable after the reset - * completes, assuming that the device descriptors did not change during - * reset and all previous interface state can be restored. - * - * If something changes, or you cannot easily locate/verify the resetted - * device, return LIBUSB_ERROR_NOT_FOUND. This prompts the application - * to close the old handle and re-enumerate the device. - * - * Return: - * - 0 on success - * - LIBUSB_ERROR_NOT_FOUND if re-enumeration is required, or if the device - * has been disconnected since it was opened - * - another LIBUSB_ERROR code on other failure - */ - int (*reset_device)(struct libusb_device_handle *dev_handle); - - /* Alloc num_streams usb3 bulk streams on the passed in endpoints */ - int (*alloc_streams)(struct libusb_device_handle *dev_handle, - uint32_t num_streams, unsigned char *endpoints, int num_endpoints); - - /* Free usb3 bulk streams allocated with alloc_streams */ - int (*free_streams)(struct libusb_device_handle *dev_handle, - unsigned char *endpoints, int num_endpoints); - - /* Allocate persistent DMA memory for the given device, suitable for - * zerocopy. May return NULL on failure. Optional to implement. - */ - unsigned char *(*dev_mem_alloc)(struct libusb_device_handle *handle, - size_t len); - - /* Free memory allocated by dev_mem_alloc. */ - int (*dev_mem_free)(struct libusb_device_handle *handle, - unsigned char *buffer, size_t len); - - /* Determine if a kernel driver is active on an interface. Optional. - * - * The presence of a kernel driver on an interface indicates that any - * calls to claim_interface would fail with the LIBUSB_ERROR_BUSY code. - * - * Return: - * - 0 if no driver is active - * - 1 if a driver is active - * - LIBUSB_ERROR_NO_DEVICE if the device has been disconnected since it - * was opened - * - another LIBUSB_ERROR code on other failure - */ - int (*kernel_driver_active)(struct libusb_device_handle *dev_handle, - int interface_number); - - /* Detach a kernel driver from an interface. Optional. - * - * After detaching a kernel driver, the interface should be available - * for claim. - * - * Return: - * - 0 on success - * - LIBUSB_ERROR_NOT_FOUND if no kernel driver was active - * - LIBUSB_ERROR_INVALID_PARAM if the interface does not exist - * - LIBUSB_ERROR_NO_DEVICE if the device has been disconnected since it - * was opened - * - another LIBUSB_ERROR code on other failure - */ - int (*detach_kernel_driver)(struct libusb_device_handle *dev_handle, - int interface_number); - - /* Attach a kernel driver to an interface. Optional. - * - * Reattach a kernel driver to the device. - * - * Return: - * - 0 on success - * - LIBUSB_ERROR_NOT_FOUND if no kernel driver was active - * - LIBUSB_ERROR_INVALID_PARAM if the interface does not exist - * - LIBUSB_ERROR_NO_DEVICE if the device has been disconnected since it - * was opened - * - LIBUSB_ERROR_BUSY if a program or driver has claimed the interface, - * preventing reattachment - * - another LIBUSB_ERROR code on other failure - */ - int (*attach_kernel_driver)(struct libusb_device_handle *dev_handle, - int interface_number); - - /* Destroy a device. Optional. - * - * This function is called when the last reference to a device is - * destroyed. It should free any resources allocated in the get_device_list - * path. - */ - void (*destroy_device)(struct libusb_device *dev); - - /* Submit a transfer. Your implementation should take the transfer, - * morph it into whatever form your platform requires, and submit it - * asynchronously. - * - * This function must not block. - * - * This function gets called with the flying_transfers_lock locked! - * - * Return: - * - 0 on success - * - LIBUSB_ERROR_NO_DEVICE if the device has been disconnected - * - another LIBUSB_ERROR code on other failure - */ - int (*submit_transfer)(struct usbi_transfer *itransfer); - - /* Cancel a previously submitted transfer. - * - * This function must not block. The transfer cancellation must complete - * later, resulting in a call to usbi_handle_transfer_cancellation() - * from the context of handle_events. - */ - int (*cancel_transfer)(struct usbi_transfer *itransfer); - - /* Clear a transfer as if it has completed or cancelled, but do not - * report any completion/cancellation to the library. You should free - * all private data from the transfer as if you were just about to report - * completion or cancellation. - * - * This function might seem a bit out of place. It is used when src - * detects a disconnected device - it calls this function for all pending - * transfers before reporting completion (with the disconnect code) to - * the user. Maybe we can improve upon this internal interface in future. - */ - void (*clear_transfer_priv)(struct usbi_transfer *itransfer); - - /* Handle any pending events on file descriptors. Optional. - * - * Provide this function when file descriptors directly indicate device - * or transfer activity. If your backend does not have such file descriptors, - * implement the handle_transfer_completion function below. - * - * This involves monitoring any active transfers and processing their - * completion or cancellation. - * - * The function is passed an array of pollfd structures (size nfds) - * as a result of the poll() system call. The num_ready parameter - * indicates the number of file descriptors that have reported events - * (i.e. the poll() return value). This should be enough information - * for you to determine which actions need to be taken on the currently - * active transfers. - * - * For any cancelled transfers, call usbi_handle_transfer_cancellation(). - * For completed transfers, call usbi_handle_transfer_completion(). - * For control/bulk/interrupt transfers, populate the "transferred" - * element of the appropriate usbi_transfer structure before calling the - * above functions. For isochronous transfers, populate the status and - * transferred fields of the iso packet descriptors of the transfer. - * - * This function should also be able to detect disconnection of the - * device, reporting that situation with usbi_handle_disconnect(). - * - * When processing an event related to a transfer, you probably want to - * take usbi_transfer.lock to prevent races. See the documentation for - * the usbi_transfer structure. - * - * Return 0 on success, or a LIBUSB_ERROR code on failure. - */ - int (*handle_events)(struct libusb_context *ctx, - struct pollfd *fds, POLL_NFDS_TYPE nfds, int num_ready); - - /* Handle transfer completion. Optional. - * - * Provide this function when there are no file descriptors available - * that directly indicate device or transfer activity. If your backend does - * have such file descriptors, implement the handle_events function above. - * - * Your backend must tell the library when a transfer has completed by - * calling usbi_signal_transfer_completion(). You should store any private - * information about the transfer and its completion status in the transfer's - * private backend data. - * - * During event handling, this function will be called on each transfer for - * which usbi_signal_transfer_completion() was called. - * - * For any cancelled transfers, call usbi_handle_transfer_cancellation(). - * For completed transfers, call usbi_handle_transfer_completion(). - * For control/bulk/interrupt transfers, populate the "transferred" - * element of the appropriate usbi_transfer structure before calling the - * above functions. For isochronous transfers, populate the status and - * transferred fields of the iso packet descriptors of the transfer. - * - * Return 0 on success, or a LIBUSB_ERROR code on failure. - */ - int (*handle_transfer_completion)(struct usbi_transfer *itransfer); - - /* Get time from specified clock. At least two clocks must be implemented - by the backend: USBI_CLOCK_REALTIME, and USBI_CLOCK_MONOTONIC. - - Description of clocks: - USBI_CLOCK_REALTIME : clock returns time since system epoch. - USBI_CLOCK_MONOTONIC: clock returns time since unspecified start - time (usually boot). - */ - int (*clock_gettime)(int clkid, struct timespec *tp); - -#ifdef USBI_TIMERFD_AVAILABLE - /* clock ID of the clock that should be used for timerfd */ - clockid_t (*get_timerfd_clockid)(void); -#endif - - /* Number of bytes to reserve for per-context private backend data. - * This private data area is accessible through the "os_priv" field of - * struct libusb_context. */ - size_t context_priv_size; - - /* Number of bytes to reserve for per-device private backend data. - * This private data area is accessible through the "os_priv" field of - * struct libusb_device. */ - size_t device_priv_size; - - /* Number of bytes to reserve for per-handle private backend data. - * This private data area is accessible through the "os_priv" field of - * struct libusb_device. */ - size_t device_handle_priv_size; - - /* Number of bytes to reserve for per-transfer private backend data. - * This private data area is accessible by calling - * usbi_transfer_get_os_priv() on the appropriate usbi_transfer instance. - */ - size_t transfer_priv_size; -}; - -extern const struct usbi_os_backend usbi_backend; - -extern struct list_head active_contexts_list; -extern usbi_mutex_static_t active_contexts_lock; - -#ifdef __cplusplus -} -#endif - -#endif diff --git a/c8_libusb/src/os/linux_netlink.c b/c8_libusb/src/os/linux_netlink.c deleted file mode 100644 index ff5bb37..0000000 --- a/c8_libusb/src/os/linux_netlink.c +++ /dev/null @@ -1,409 +0,0 @@ -/* -*- Mode: C; c-basic-offset:8 ; indent-tabs-mode:t -*- */ -/* - * Linux usbfs backend for src - * Copyright (C) 2007-2009 Daniel Drake - * Copyright (c) 2001 Johannes Erdfelt - * Copyright (c) 2013 Nathan Hjelm - * Copyright (c) 2016 Chris Dickens - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include "libusb_config.h" - -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#ifdef HAVE_ASM_TYPES_H -#include -#endif - -#include -#include - -#include "../libusbi.h" -#include "linux_usbfs.h" - -#define NL_GROUP_KERNEL 1 - -#ifndef SOCK_CLOEXEC -#define SOCK_CLOEXEC 0 -#endif - -#ifndef SOCK_NONBLOCK -#define SOCK_NONBLOCK 0 -#endif - -static int linux_netlink_socket = -1; -static int netlink_control_pipe[2] = { -1, -1 }; -static pthread_t libusb_linux_event_thread; - -static void *linux_netlink_event_thread_main(void *arg); - -static int set_fd_cloexec_nb(int fd, int socktype) -{ - int flags; - -#if defined(FD_CLOEXEC) - /* Make sure the netlink socket file descriptor is marked as CLOEXEC */ - if (!(socktype & SOCK_CLOEXEC)) { - flags = fcntl(fd, F_GETFD); - if (flags == -1) { - usbi_err(NULL, "failed to get netlink fd flags (%d)", errno); - return -1; - } - - if (fcntl(fd, F_SETFD, flags | FD_CLOEXEC) == -1) { - usbi_err(NULL, "failed to set netlink fd flags (%d)", errno); - return -1; - } - } -#endif - - /* Make sure the netlink socket is non-blocking */ - if (!(socktype & SOCK_NONBLOCK)) { - flags = fcntl(fd, F_GETFL); - if (flags == -1) { - usbi_err(NULL, "failed to get netlink fd status flags (%d)", errno); - return -1; - } - - if (fcntl(fd, F_SETFL, flags | O_NONBLOCK) == -1) { - usbi_err(NULL, "failed to set netlink fd status flags (%d)", errno); - return -1; - } - } - - return 0; -} - -int linux_netlink_start_event_monitor(void) -{ - struct sockaddr_nl sa_nl = { .nl_family = AF_NETLINK, .nl_groups = NL_GROUP_KERNEL }; - int socktype = SOCK_RAW | SOCK_NONBLOCK | SOCK_CLOEXEC; - int opt = 1; - int ret; - - linux_netlink_socket = socket(PF_NETLINK, socktype, NETLINK_KOBJECT_UEVENT); - if (linux_netlink_socket == -1 && errno == EINVAL) { - usbi_dbg("failed to create netlink socket of type %d, attempting SOCK_RAW", socktype); - socktype = SOCK_RAW; - linux_netlink_socket = socket(PF_NETLINK, socktype, NETLINK_KOBJECT_UEVENT); - } - - if (linux_netlink_socket == -1) { - usbi_err(NULL, "failed to create netlink socket (%d)", errno); - goto err; - } - - ret = set_fd_cloexec_nb(linux_netlink_socket, socktype); - if (ret == -1) - goto err_close_socket; - - ret = bind(linux_netlink_socket, (struct sockaddr *)&sa_nl, sizeof(sa_nl)); - if (ret == -1) { - usbi_err(NULL, "failed to bind netlink socket (%d)", errno); - goto err_close_socket; - } - - ret = setsockopt(linux_netlink_socket, SOL_SOCKET, SO_PASSCRED, &opt, sizeof(opt)); - if (ret == -1) { - usbi_err(NULL, "failed to set netlink socket SO_PASSCRED option (%d)", errno); - goto err_close_socket; - } - - ret = usbi_pipe(netlink_control_pipe); - if (ret) { - usbi_err(NULL, "failed to create netlink control pipe"); - goto err_close_socket; - } - - ret = pthread_create(&libusb_linux_event_thread, NULL, linux_netlink_event_thread_main, NULL); - if (ret != 0) { - usbi_err(NULL, "failed to create netlink event thread (%d)", ret); - goto err_close_pipe; - } - - return LIBUSB_SUCCESS; - -err_close_pipe: - close(netlink_control_pipe[0]); - close(netlink_control_pipe[1]); - netlink_control_pipe[0] = -1; - netlink_control_pipe[1] = -1; -err_close_socket: - close(linux_netlink_socket); - linux_netlink_socket = -1; -err: - return LIBUSB_ERROR_OTHER; -} - -int linux_netlink_stop_event_monitor(void) -{ - char dummy = 1; - ssize_t r; - - assert(linux_netlink_socket != -1); - - /* Write some dummy data to the control pipe and - * wait for the thread to exit */ - r = write(netlink_control_pipe[1], &dummy, sizeof(dummy)); - if (r <= 0) - usbi_warn(NULL, "netlink control pipe signal failed"); - - pthread_join(libusb_linux_event_thread, NULL); - - close(linux_netlink_socket); - linux_netlink_socket = -1; - - /* close and reset control pipe */ - close(netlink_control_pipe[0]); - close(netlink_control_pipe[1]); - netlink_control_pipe[0] = -1; - netlink_control_pipe[1] = -1; - - return LIBUSB_SUCCESS; -} - -static const char *netlink_message_parse(const char *buffer, size_t len, const char *key) -{ - const char *end = buffer + len; - size_t keylen = strlen(key); - - while (buffer < end && *buffer) { - if (strncmp(buffer, key, keylen) == 0 && buffer[keylen] == '=') - return buffer + keylen + 1; - buffer += strlen(buffer) + 1; - } - - return NULL; -} - -/* parse parts of netlink message common to both libudev and the kernel */ -static int linux_netlink_parse(const char *buffer, size_t len, int *detached, - const char **sys_name, uint8_t *busnum, uint8_t *devaddr) -{ - const char *tmp, *slash; - - errno = 0; - - *sys_name = NULL; - *detached = 0; - *busnum = 0; - *devaddr = 0; - - tmp = netlink_message_parse(buffer, len, "ACTION"); - if (!tmp) { - return -1; - } else if (strcmp(tmp, "remove") == 0) { - *detached = 1; - } else if (strcmp(tmp, "add") != 0) { - usbi_dbg("unknown device action %s", tmp); - return -1; - } - - /* check that this is a usb message */ - tmp = netlink_message_parse(buffer, len, "SUBSYSTEM"); - if (!tmp || strcmp(tmp, "usb") != 0) { - /* not usb. ignore */ - return -1; - } - - /* check that this is an actual usb device */ - tmp = netlink_message_parse(buffer, len, "DEVTYPE"); - if (!tmp || strcmp(tmp, "usb_device") != 0) { - /* not usb. ignore */ - return -1; - } - - tmp = netlink_message_parse(buffer, len, "BUSNUM"); - if (tmp) { - *busnum = (uint8_t)(strtoul(tmp, NULL, 10) & 0xff); - if (errno) { - errno = 0; - return -1; - } - - tmp = netlink_message_parse(buffer, len, "DEVNUM"); - if (NULL == tmp) - return -1; - - *devaddr = (uint8_t)(strtoul(tmp, NULL, 10) & 0xff); - if (errno) { - errno = 0; - return -1; - } - } else { - /* no bus number. try "DEVICE" */ - tmp = netlink_message_parse(buffer, len, "DEVICE"); - if (!tmp) { - /* not usb. ignore */ - return -1; - } - - /* Parse a device path such as /dev/bus/usb/003/004 */ - slash = strrchr(tmp, '/'); - if (!slash) - return -1; - - *busnum = (uint8_t)(strtoul(slash - 3, NULL, 10) & 0xff); - if (errno) { - errno = 0; - return -1; - } - - *devaddr = (uint8_t)(strtoul(slash + 1, NULL, 10) & 0xff); - if (errno) { - errno = 0; - return -1; - } - - return 0; - } - - tmp = netlink_message_parse(buffer, len, "DEVPATH"); - if (!tmp) - return -1; - - slash = strrchr(tmp, '/'); - if (slash) - *sys_name = slash + 1; - - /* found a usb device */ - return 0; -} - -static int linux_netlink_read_message(void) -{ - char cred_buffer[CMSG_SPACE(sizeof(struct ucred))]; - char msg_buffer[2048]; - const char *sys_name = NULL; - uint8_t busnum, devaddr; - int detached, r; - ssize_t len; - struct cmsghdr *cmsg; - struct ucred *cred; - struct sockaddr_nl sa_nl; - struct iovec iov = { .iov_base = msg_buffer, .iov_len = sizeof(msg_buffer) }; - struct msghdr msg = { - .msg_iov = &iov, .msg_iovlen = 1, - .msg_control = cred_buffer, .msg_controllen = sizeof(cred_buffer), - .msg_name = &sa_nl, .msg_namelen = sizeof(sa_nl) - }; - - /* read netlink message */ - len = recvmsg(linux_netlink_socket, &msg, 0); - if (len == -1) { - if (errno != EAGAIN && errno != EINTR) - usbi_err(NULL, "error receiving message from netlink (%d)", errno); - return -1; - } - - if (len < 32 || (msg.msg_flags & MSG_TRUNC)) { - usbi_err(NULL, "invalid netlink message length"); - return -1; - } - - if (sa_nl.nl_groups != NL_GROUP_KERNEL || sa_nl.nl_pid != 0) { - usbi_dbg("ignoring netlink message from unknown group/PID (%u/%u)", - (unsigned int)sa_nl.nl_groups, (unsigned int)sa_nl.nl_pid); - return -1; - } - - cmsg = CMSG_FIRSTHDR(&msg); - if (!cmsg || cmsg->cmsg_type != SCM_CREDENTIALS) { - usbi_dbg("ignoring netlink message with no sender credentials"); - return -1; - } - - cred = (struct ucred *)CMSG_DATA(cmsg); - if (cred->uid != 0) { - usbi_dbg("ignoring netlink message with non-zero sender UID %u", (unsigned int)cred->uid); - return -1; - } - - r = linux_netlink_parse(msg_buffer, (size_t)len, &detached, &sys_name, &busnum, &devaddr); - if (r) - return r; - - usbi_dbg("netlink hotplug found device busnum: %hhu, devaddr: %hhu, sys_name: %s, removed: %s", - busnum, devaddr, sys_name, detached ? "yes" : "no"); - - /* signal device is available (or not) to all contexts */ - if (detached) - linux_device_disconnected(busnum, devaddr); - else - linux_hotplug_enumerate(busnum, devaddr, sys_name); - - return 0; -} - -static void *linux_netlink_event_thread_main(void *arg) -{ - char dummy; - int r; - ssize_t nb; - struct pollfd fds[] = { - { .fd = netlink_control_pipe[0], - .events = POLLIN }, - { .fd = linux_netlink_socket, - .events = POLLIN }, - }; - - UNUSED(arg); - - usbi_dbg("netlink event thread entering"); - - while ((r = poll(fds, 2, -1)) >= 0 || errno == EINTR) { - if (r < 0) { - /* temporary failure */ - continue; - } - if (fds[0].revents & POLLIN) { - /* activity on control pipe, read the byte and exit */ - nb = read(netlink_control_pipe[0], &dummy, sizeof(dummy)); - if (nb <= 0) - usbi_warn(NULL, "netlink control pipe read failed"); - break; - } - if (fds[1].revents & POLLIN) { - usbi_mutex_static_lock(&linux_hotplug_lock); - linux_netlink_read_message(); - usbi_mutex_static_unlock(&linux_hotplug_lock); - } - } - - usbi_dbg("netlink event thread exiting"); - - return NULL; -} - -void linux_netlink_hotplug_poll(void) -{ - int r; - - usbi_mutex_static_lock(&linux_hotplug_lock); - do { - r = linux_netlink_read_message(); - } while (r == 0); - usbi_mutex_static_unlock(&linux_hotplug_lock); -} diff --git a/c8_libusb/src/os/linux_udev.c b/c8_libusb/src/os/linux_udev.c deleted file mode 100644 index 5d63000..0000000 --- a/c8_libusb/src/os/linux_udev.c +++ /dev/null @@ -1,329 +0,0 @@ -/* -*- Mode: C; c-basic-offset:8 ; indent-tabs-mode:t -*- */ -/* - * Linux usbfs backend for src - * Copyright (C) 2007-2009 Daniel Drake - * Copyright (c) 2001 Johannes Erdfelt - * Copyright (c) 2012-2013 Nathan Hjelm - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include "libusb_config.h" - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include "../libusbi.h" -#include "linux_usbfs.h" - -/* udev context */ -static struct udev *udev_ctx = NULL; -static int udev_monitor_fd = -1; -static int udev_control_pipe[2] = {-1, -1}; -static struct udev_monitor *udev_monitor = NULL; -static pthread_t linux_event_thread; - -static void udev_hotplug_event(struct udev_device* udev_dev); -static void *linux_udev_event_thread_main(void *arg); - -int linux_udev_start_event_monitor(void) -{ - int r; - - assert(udev_ctx == NULL); - udev_ctx = udev_new(); - if (!udev_ctx) { - usbi_err(NULL, "could not create udev context"); - goto err; - } - - udev_monitor = udev_monitor_new_from_netlink(udev_ctx, "udev"); - if (!udev_monitor) { - usbi_err(NULL, "could not initialize udev monitor"); - goto err_free_ctx; - } - - r = udev_monitor_filter_add_match_subsystem_devtype(udev_monitor, "usb", "usb_device"); - if (r) { - usbi_err(NULL, "could not initialize udev monitor filter for \"usb\" subsystem"); - goto err_free_monitor; - } - - if (udev_monitor_enable_receiving(udev_monitor)) { - usbi_err(NULL, "failed to enable the udev monitor"); - goto err_free_monitor; - } - - udev_monitor_fd = udev_monitor_get_fd(udev_monitor); - -#if defined(FD_CLOEXEC) - /* Make sure the udev file descriptor is marked as CLOEXEC */ - r = fcntl(udev_monitor_fd, F_GETFD); - if (r == -1) { - usbi_err(NULL, "geting udev monitor fd flags (%d)", errno); - goto err_free_monitor; - } - if (!(r & FD_CLOEXEC)) { - if (fcntl(udev_monitor_fd, F_SETFD, r | FD_CLOEXEC) == -1) { - usbi_err(NULL, "setting udev monitor fd flags (%d)", errno); - goto err_free_monitor; - } - } -#endif - - /* Some older versions of udev are not non-blocking by default, - * so make sure this is set */ - r = fcntl(udev_monitor_fd, F_GETFL); - if (r == -1) { - usbi_err(NULL, "getting udev monitor fd status flags (%d)", errno); - goto err_free_monitor; - } - if (!(r & O_NONBLOCK)) { - if (fcntl(udev_monitor_fd, F_SETFL, r | O_NONBLOCK) == -1) { - usbi_err(NULL, "setting udev monitor fd status flags (%d)", errno); - goto err_free_monitor; - } - } - - r = usbi_pipe(udev_control_pipe); - if (r) { - usbi_err(NULL, "could not create udev control pipe"); - goto err_free_monitor; - } - - r = pthread_create(&linux_event_thread, NULL, linux_udev_event_thread_main, NULL); - if (r) { - usbi_err(NULL, "creating hotplug event thread (%d)", r); - goto err_close_pipe; - } - - return LIBUSB_SUCCESS; - -err_close_pipe: - close(udev_control_pipe[0]); - close(udev_control_pipe[1]); -err_free_monitor: - udev_monitor_unref(udev_monitor); - udev_monitor = NULL; - udev_monitor_fd = -1; -err_free_ctx: - udev_unref(udev_ctx); -err: - udev_ctx = NULL; - return LIBUSB_ERROR_OTHER; -} - -int linux_udev_stop_event_monitor(void) -{ - char dummy = 1; - int r; - - assert(udev_ctx != NULL); - assert(udev_monitor != NULL); - assert(udev_monitor_fd != -1); - - /* Write some dummy data to the control pipe and - * wait for the thread to exit */ - r = write(udev_control_pipe[1], &dummy, sizeof(dummy)); - if (r <= 0) { - usbi_warn(NULL, "udev control pipe signal failed"); - } - pthread_join(linux_event_thread, NULL); - - /* Release the udev monitor */ - udev_monitor_unref(udev_monitor); - udev_monitor = NULL; - udev_monitor_fd = -1; - - /* Clean up the udev context */ - udev_unref(udev_ctx); - udev_ctx = NULL; - - /* close and reset control pipe */ - close(udev_control_pipe[0]); - close(udev_control_pipe[1]); - udev_control_pipe[0] = -1; - udev_control_pipe[1] = -1; - - return LIBUSB_SUCCESS; -} - -static void *linux_udev_event_thread_main(void *arg) -{ - char dummy; - int r; - ssize_t nb; - struct udev_device* udev_dev; - struct pollfd fds[] = { - {.fd = udev_control_pipe[0], - .events = POLLIN}, - {.fd = udev_monitor_fd, - .events = POLLIN}, - }; - - usbi_dbg("udev event thread entering."); - - while ((r = poll(fds, 2, -1)) >= 0 || errno == EINTR) { - if (r < 0) { - /* temporary failure */ - continue; - } - if (fds[0].revents & POLLIN) { - /* activity on control pipe, read the byte and exit */ - nb = read(udev_control_pipe[0], &dummy, sizeof(dummy)); - if (nb <= 0) { - usbi_warn(NULL, "udev control pipe read failed"); - } - break; - } - if (fds[1].revents & POLLIN) { - usbi_mutex_static_lock(&linux_hotplug_lock); - udev_dev = udev_monitor_receive_device(udev_monitor); - if (udev_dev) - udev_hotplug_event(udev_dev); - usbi_mutex_static_unlock(&linux_hotplug_lock); - } - } - - usbi_dbg("udev event thread exiting"); - - return NULL; -} - -static int udev_device_info(struct libusb_context *ctx, int detached, - struct udev_device *udev_dev, uint8_t *busnum, - uint8_t *devaddr, const char **sys_name) { - const char *dev_node; - - dev_node = udev_device_get_devnode(udev_dev); - if (!dev_node) { - return LIBUSB_ERROR_OTHER; - } - - *sys_name = udev_device_get_sysname(udev_dev); - if (!*sys_name) { - return LIBUSB_ERROR_OTHER; - } - - return linux_get_device_address(ctx, detached, busnum, devaddr, - dev_node, *sys_name, -1); -} - -static void udev_hotplug_event(struct udev_device* udev_dev) -{ - const char* udev_action; - const char* sys_name = NULL; - uint8_t busnum = 0, devaddr = 0; - int detached; - int r; - - do { - udev_action = udev_device_get_action(udev_dev); - if (!udev_action) { - break; - } - - detached = !strncmp(udev_action, "remove", 6); - - r = udev_device_info(NULL, detached, udev_dev, &busnum, &devaddr, &sys_name); - if (LIBUSB_SUCCESS != r) { - break; - } - - usbi_dbg("udev hotplug event. action: %s.", udev_action); - - if (strncmp(udev_action, "add", 3) == 0) { - linux_hotplug_enumerate(busnum, devaddr, sys_name); - } else if (detached) { - linux_device_disconnected(busnum, devaddr); - } else { - usbi_err(NULL, "ignoring udev action %s", udev_action); - } - } while (0); - - udev_device_unref(udev_dev); -} - -int linux_udev_scan_devices(struct libusb_context *ctx) -{ - struct udev_enumerate *enumerator; - struct udev_list_entry *devices, *entry; - struct udev_device *udev_dev; - const char *sys_name; - int r; - - assert(udev_ctx != NULL); - - enumerator = udev_enumerate_new(udev_ctx); - if (NULL == enumerator) { - usbi_err(ctx, "error creating udev enumerator"); - return LIBUSB_ERROR_OTHER; - } - - udev_enumerate_add_match_subsystem(enumerator, "usb"); - udev_enumerate_add_match_property(enumerator, "DEVTYPE", "usb_device"); - udev_enumerate_scan_devices(enumerator); - devices = udev_enumerate_get_list_entry(enumerator); - - entry = NULL; - udev_list_entry_foreach(entry, devices) { - const char *path = udev_list_entry_get_name(entry); - uint8_t busnum = 0, devaddr = 0; - - udev_dev = udev_device_new_from_syspath(udev_ctx, path); - - r = udev_device_info(ctx, 0, udev_dev, &busnum, &devaddr, &sys_name); - if (r) { - udev_device_unref(udev_dev); - continue; - } - - linux_enumerate_device(ctx, busnum, devaddr, sys_name); - udev_device_unref(udev_dev); - } - - udev_enumerate_unref(enumerator); - - return LIBUSB_SUCCESS; -} - -void linux_udev_hotplug_poll(void) -{ - struct udev_device* udev_dev; - - usbi_mutex_static_lock(&linux_hotplug_lock); - do { - udev_dev = udev_monitor_receive_device(udev_monitor); - if (udev_dev) { - usbi_dbg("Handling hotplug event from hotplug_poll"); - udev_hotplug_event(udev_dev); - } - } while (udev_dev); - usbi_mutex_static_unlock(&linux_hotplug_lock); -} diff --git a/c8_libusb/src/os/linux_usbfs.c b/c8_libusb/src/os/linux_usbfs.c deleted file mode 100644 index 6742e2a..0000000 --- a/c8_libusb/src/os/linux_usbfs.c +++ /dev/null @@ -1,2899 +0,0 @@ -/* -*- Mode: C; c-basic-offset:8 ; indent-tabs-mode:t -*- */ -/* - * Linux usbfs backend for src - * Copyright © 2007-2009 Daniel Drake - * Copyright © 2001 Johannes Erdfelt - * Copyright © 2013 Nathan Hjelm - * Copyright © 2012-2013 Hans de Goede - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include "libusb_config.h" - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include "../libusbi.h" -#include "linux_usbfs.h" - -/* sysfs vs usbfs: - * opening a usbfs node causes the device to be resumed, so we attempt to - * avoid this during enumeration. - * - * sysfs allows us to read the kernel's in-memory copies of device descriptors - * and so forth, avoiding the need to open the device: - * - The binary "descriptors" file contains all config descriptors since - * 2.6.26, commit 217a9081d8e69026186067711131b77f0ce219ed - * - The binary "descriptors" file was added in 2.6.23, commit - * 69d42a78f935d19384d1f6e4f94b65bb162b36df, but it only contains the - * active config descriptors - * - The "busnum" file was added in 2.6.22, commit - * 83f7d958eab2fbc6b159ee92bf1493924e1d0f72 - * - The "devnum" file has been present since pre-2.6.18 - * - the "bConfigurationValue" file has been present since pre-2.6.18 - * - * If we have bConfigurationValue, busnum, and devnum, then we can determine - * the active configuration without having to open the usbfs node in RDWR mode. - * The busnum file is important as that is the only way we can relate sysfs - * devices to usbfs nodes. - * - * If we also have all descriptors, we can obtain the device descriptor and - * configuration without touching usbfs at all. - */ - -/* endianness for multi-byte fields: - * - * Descriptors exposed by usbfs have the multi-byte fields in the device - * descriptor as host endian. Multi-byte fields in the other descriptors are - * bus-endian. The kernel documentation says otherwise, but it is wrong. - * - * In sysfs all descriptors are bus-endian. - */ - -static const char *usbfs_path = NULL; - -/* use usbdev*.* device names in /dev instead of the usbfs bus directories */ -static int usbdev_names = 0; - -/* Linux has changed the maximum length of an individual isochronous packet - * over time. Initially this limit was 1,023 bytes, but Linux 2.6.18 - * (commit 3612242e527eb47ee4756b5350f8bdf791aa5ede) increased this value to - * 8,192 bytes to support higher bandwidth devices. Linux 3.10 - * (commit e2e2f0ea1c935edcf53feb4c4c8fdb4f86d57dd9) further increased this - * value to 49,152 bytes to support super speed devices. - */ -static unsigned int max_iso_packet_len = 0; - -/* Linux 2.6.23 adds support for O_CLOEXEC when opening files, which marks the - * close-on-exec flag in the underlying file descriptor. */ -static int supports_flag_cloexec = -1; - -/* Linux 2.6.32 adds support for a bulk continuation URB flag. this basically - * allows us to mark URBs as being part of a specific logical transfer when - * we submit them to the kernel. then, on any error except a cancellation, all - * URBs within that transfer will be cancelled and no more URBs will be - * accepted for the transfer, meaning that no more data can creep in. - * - * The BULK_CONTINUATION flag must be set on all URBs within a bulk transfer - * (in either direction) except the first. - * For IN transfers, we must also set SHORT_NOT_OK on all URBs except the - * last; it means that the kernel should treat a short reply as an error. - * For OUT transfers, SHORT_NOT_OK must not be set. it isn't needed (OUT - * transfers can't be short unless there's already some sort of error), and - * setting this flag is disallowed (a kernel with USB debugging enabled will - * reject such URBs). - */ -static int supports_flag_bulk_continuation = -1; - -/* Linux 2.6.31 fixes support for the zero length packet URB flag. This - * allows us to mark URBs that should be followed by a zero length data - * packet, which can be required by device- or class-specific protocols. - */ -static int supports_flag_zero_packet = -1; - -/* clock ID for monotonic clock, as not all clock sources are available on all - * systems. appropriate choice made at initialization time. */ -static clockid_t monotonic_clkid = -1; - -/* Linux 2.6.22 (commit 83f7d958eab2fbc6b159ee92bf1493924e1d0f72) adds a busnum - * to sysfs, so we can relate devices. This also implies that we can read - * the active configuration through bConfigurationValue */ -static int sysfs_can_relate_devices = -1; - -/* Linux 2.6.26 (commit 217a9081d8e69026186067711131b77f0ce219ed) adds all - * config descriptors (rather then just the active config) to the sysfs - * descriptors file, so from then on we can use them. */ -static int sysfs_has_descriptors = -1; - -/* how many times have we initted (and not exited) ? */ -static int init_count = 0; - -/* Serialize hotplug start/stop */ -static usbi_mutex_static_t linux_hotplug_startstop_lock = USBI_MUTEX_INITIALIZER; -/* Serialize scan-devices, event-thread, and poll */ -usbi_mutex_static_t linux_hotplug_lock = USBI_MUTEX_INITIALIZER; - -static int linux_start_event_monitor(void); -static int linux_stop_event_monitor(void); -static int linux_scan_devices(struct libusb_context *ctx); -static int sysfs_scan_device(struct libusb_context *ctx, const char *devname); -static int detach_kernel_driver_and_claim(struct libusb_device_handle *, int); - -#if !defined(USE_UDEV) -static int linux_default_scan_devices (struct libusb_context *ctx); -#endif - -struct kernel_version { - int major; - int minor; - int sublevel; -}; - -struct linux_device_priv { - char *sysfs_dir; - unsigned char *descriptors; - int descriptors_len; - int active_config; /* cache val for !sysfs_can_relate_devices */ -}; - -struct linux_device_handle_priv { - int fd; - int fd_removed; - int fd_keep; - uint32_t caps; -}; - -enum reap_action { - NORMAL = 0, - /* submission failed after the first URB, so await cancellation/completion - * of all the others */ - SUBMIT_FAILED, - - /* cancelled by user or timeout */ - CANCELLED, - - /* completed multi-URB transfer in non-final URB */ - COMPLETED_EARLY, - - /* one or more urbs encountered a low-level error */ - ERROR, -}; - -struct linux_transfer_priv { - union { - struct usbfs_urb *urbs; - struct usbfs_urb **iso_urbs; - }; - - enum reap_action reap_action; - int num_urbs; - int num_retired; - enum libusb_transfer_status reap_status; - - /* next iso packet in user-supplied transfer to be populated */ - int iso_packet_offset; -}; - -static int _open(const char *path, int flags) -{ -#if defined(O_CLOEXEC) - if (supports_flag_cloexec) - return open(path, flags | O_CLOEXEC); - else -#endif - return open(path, flags); -} - -static int _get_usbfs_fd(struct libusb_device *dev, mode_t mode, int silent) -{ - struct libusb_context *ctx = DEVICE_CTX(dev); - char path[PATH_MAX]; - int fd; - int delay = 10000; - - if (usbdev_names) - snprintf(path, PATH_MAX, "%s/usbdev%d.%d", - usbfs_path, dev->bus_number, dev->device_address); - else - snprintf(path, PATH_MAX, "%s/%03d/%03d", - usbfs_path, dev->bus_number, dev->device_address); - - fd = _open(path, mode); - if (fd != -1) - return fd; /* Success */ - - if (errno == ENOENT) { - if (!silent) - usbi_err(ctx, "File doesn't exist, wait %d ms and try again", delay/1000); - - /* Wait 10ms for USB device path creation.*/ - nanosleep(&(struct timespec){delay / 1000000, (delay * 1000) % 1000000000UL}, NULL); - - fd = _open(path, mode); - if (fd != -1) - return fd; /* Success */ - } - - if (!silent) { - usbi_err(ctx, "src couldn't open USB device %s: %s", - path, strerror(errno)); - if (errno == EACCES && mode == O_RDWR) - usbi_err(ctx, "src requires write access to USB " - "device nodes."); - } - - if (errno == EACCES) - return LIBUSB_ERROR_ACCESS; - if (errno == ENOENT) - return LIBUSB_ERROR_NO_DEVICE; - return LIBUSB_ERROR_IO; -} - -static struct linux_device_priv *_device_priv(struct libusb_device *dev) -{ - return (struct linux_device_priv *) dev->os_priv; -} - -static struct linux_device_handle_priv *_device_handle_priv( - struct libusb_device_handle *handle) -{ - return (struct linux_device_handle_priv *) handle->os_priv; -} - -/* check dirent for a /dev/usbdev%d.%d name - * optionally return bus/device on success */ -static int _is_usbdev_entry(struct dirent *entry, int *bus_p, int *dev_p) -{ - int busnum, devnum; - - if (sscanf(entry->d_name, "usbdev%d.%d", &busnum, &devnum) != 2) - return 0; - - usbi_dbg("found: %s", entry->d_name); - if (bus_p != NULL) - *bus_p = busnum; - if (dev_p != NULL) - *dev_p = devnum; - return 1; -} - -static int check_usb_vfs(const char *dirname) -{ - DIR *dir; - struct dirent *entry; - int found = 0; - - dir = opendir(dirname); - if (!dir) - return 0; - - while ((entry = readdir(dir)) != NULL) { - if (entry->d_name[0] == '.') - continue; - - /* We assume if we find any files that it must be the right place */ - found = 1; - break; - } - - closedir(dir); - return found; -} - -static const char *find_usbfs_path(void) -{ - const char *path = "/dev/bus/usb"; - const char *ret = NULL; - - if (check_usb_vfs(path)) { - ret = path; - } else { - path = "/proc/bus/usb"; - if (check_usb_vfs(path)) - ret = path; - } - - /* look for /dev/usbdev*.* if the normal places fail */ - if (ret == NULL) { - struct dirent *entry; - DIR *dir; - - path = "/dev"; - dir = opendir(path); - if (dir != NULL) { - while ((entry = readdir(dir)) != NULL) { - if (_is_usbdev_entry(entry, NULL, NULL)) { - /* found one; that's enough */ - ret = path; - usbdev_names = 1; - break; - } - } - closedir(dir); - } - } - -/* On udev based systems without any usb-devices /dev/bus/usb will not - * exist. So if we've not found anything and we're using udev for hotplug - * simply assume /dev/bus/usb rather then making libusb_init fail. - * Make the same assumption for Android where SELinux policies might block us - * from reading /dev on newer devices. */ -#if defined(USE_UDEV) || defined(__ANDROID__) - if (ret == NULL) - ret = "/dev/bus/usb"; -#endif - - if (ret != NULL) - usbi_dbg("found usbfs at %s", ret); - - return ret; -} - -/* the monotonic clock is not usable on all systems (e.g. embedded ones often - * seem to lack it). fall back to REALTIME if we have to. */ -static clockid_t find_monotonic_clock(void) -{ -#ifdef CLOCK_MONOTONIC - struct timespec ts; - int r; - - /* Linux 2.6.28 adds CLOCK_MONOTONIC_RAW but we don't use it - * because it's not available through timerfd */ - r = clock_gettime(CLOCK_MONOTONIC, &ts); - if (r == 0) - return CLOCK_MONOTONIC; - usbi_dbg("monotonic clock doesn't work, errno %d", errno); -#endif - - return CLOCK_REALTIME; -} - -static int get_kernel_version(struct libusb_context *ctx, - struct kernel_version *ver) -{ - struct utsname uts; - int atoms; - - if (uname(&uts) < 0) { - usbi_err(ctx, "uname failed, errno %d", errno); - return -1; - } - - atoms = sscanf(uts.release, "%d.%d.%d", &ver->major, &ver->minor, &ver->sublevel); - if (atoms < 1) { - usbi_err(ctx, "failed to parse uname release '%s'", uts.release); - return -1; - } - - if (atoms < 2) - ver->minor = -1; - if (atoms < 3) - ver->sublevel = -1; - - usbi_dbg("reported kernel version is %s", uts.release); - - return 0; -} - -static int kernel_version_ge(const struct kernel_version *ver, - int major, int minor, int sublevel) -{ - if (ver->major > major) - return 1; - else if (ver->major < major) - return 0; - - /* kmajor == major */ - if (ver->minor == -1 && ver->sublevel == -1) - return 0 == minor && 0 == sublevel; - else if (ver->minor > minor) - return 1; - else if (ver->minor < minor) - return 0; - - /* kminor == minor */ - if (ver->sublevel == -1) - return 0 == sublevel; - - return ver->sublevel >= sublevel; -} - -static int op_init(struct libusb_context *ctx) -{ - struct kernel_version kversion; - struct stat statbuf; - int r; - - usbfs_path = find_usbfs_path(); - if (!usbfs_path) { - usbi_err(ctx, "could not find usbfs"); - return LIBUSB_ERROR_OTHER; - } - - if (monotonic_clkid == -1) - monotonic_clkid = find_monotonic_clock(); - - if (get_kernel_version(ctx, &kversion) < 0) - return LIBUSB_ERROR_OTHER; - - if (supports_flag_cloexec == -1) { - /* O_CLOEXEC flag available from Linux 2.6.23 */ - supports_flag_cloexec = kernel_version_ge(&kversion,2,6,23); - } - - if (supports_flag_bulk_continuation == -1) { - /* bulk continuation URB flag available from Linux 2.6.32 */ - supports_flag_bulk_continuation = kernel_version_ge(&kversion,2,6,32); - } - - if (supports_flag_bulk_continuation) - usbi_dbg("bulk continuation flag supported"); - - if (-1 == supports_flag_zero_packet) { - /* zero length packet URB flag fixed since Linux 2.6.31 */ - supports_flag_zero_packet = kernel_version_ge(&kversion,2,6,31); - } - - if (supports_flag_zero_packet) - usbi_dbg("zero length packet flag supported"); - - if (!max_iso_packet_len) { - if (kernel_version_ge(&kversion,3,10,0)) - max_iso_packet_len = 49152; - else if (kernel_version_ge(&kversion,2,6,18)) - max_iso_packet_len = 8192; - else - max_iso_packet_len = 1023; - } - - usbi_dbg("max iso packet length is (likely) %u bytes", max_iso_packet_len); - - if (-1 == sysfs_has_descriptors) { - /* sysfs descriptors has all descriptors since Linux 2.6.26 */ - sysfs_has_descriptors = kernel_version_ge(&kversion,2,6,26); - } - - if (-1 == sysfs_can_relate_devices) { - /* sysfs has busnum since Linux 2.6.22 */ - sysfs_can_relate_devices = kernel_version_ge(&kversion,2,6,22); - } - - if (sysfs_can_relate_devices || sysfs_has_descriptors) { - r = stat(SYSFS_DEVICE_PATH, &statbuf); - if (r != 0 || !S_ISDIR(statbuf.st_mode)) { - usbi_warn(ctx, "sysfs not mounted"); - sysfs_can_relate_devices = 0; - sysfs_has_descriptors = 0; - } - } - - if (sysfs_can_relate_devices) - usbi_dbg("sysfs can relate devices"); - - if (sysfs_has_descriptors) - usbi_dbg("sysfs has complete descriptors"); - - usbi_mutex_static_lock(&linux_hotplug_startstop_lock); - r = LIBUSB_SUCCESS; - if (init_count == 0) { - /* start up hotplug event handler */ - r = linux_start_event_monitor(); - } - if (r == LIBUSB_SUCCESS) { - r = linux_scan_devices(ctx); - if (r == LIBUSB_SUCCESS) - init_count++; - else if (init_count == 0) - linux_stop_event_monitor(); - } else - usbi_err(ctx, "error starting hotplug event monitor"); - usbi_mutex_static_unlock(&linux_hotplug_startstop_lock); - - return r; -} - -static void op_exit(struct libusb_context *ctx) -{ - UNUSED(ctx); - usbi_mutex_static_lock(&linux_hotplug_startstop_lock); - assert(init_count != 0); - if (!--init_count) { - /* tear down event handler */ - (void)linux_stop_event_monitor(); - } - usbi_mutex_static_unlock(&linux_hotplug_startstop_lock); -} - -static int linux_start_event_monitor(void) -{ -#if defined(USE_UDEV) - return linux_udev_start_event_monitor(); -#elif !defined(__ANDROID__) - return linux_netlink_start_event_monitor(); -#else - return LIBUSB_SUCCESS; -#endif -} - -static int linux_stop_event_monitor(void) -{ -#if defined(USE_UDEV) - return linux_udev_stop_event_monitor(); -#elif !defined(__ANDROID__) - return linux_netlink_stop_event_monitor(); -#else - return LIBUSB_SUCCESS; -#endif -} - -static int linux_scan_devices(struct libusb_context *ctx) -{ - int ret = 0; - - usbi_mutex_static_lock(&linux_hotplug_lock); - -#if defined(USE_UDEV) - ret = linux_udev_scan_devices(ctx); -#elif !defined(__ANDROID__) - ret = linux_default_scan_devices(ctx); -#endif - - usbi_mutex_static_unlock(&linux_hotplug_lock); - - return ret; -} - -static void op_hotplug_poll(void) -{ -#if defined(USE_UDEV) - linux_udev_hotplug_poll(); -#elif !defined(__ANDROID__) - linux_netlink_hotplug_poll(); -#endif -} - -static int _open_sysfs_attr(struct libusb_device *dev, const char *attr) -{ - struct linux_device_priv *priv = _device_priv(dev); - char filename[PATH_MAX]; - int fd; - - snprintf(filename, PATH_MAX, "%s/%s/%s", - SYSFS_DEVICE_PATH, priv->sysfs_dir, attr); - fd = _open(filename, O_RDONLY); - if (fd < 0) { - usbi_err(DEVICE_CTX(dev), - "open %s failed ret=%d errno=%d", filename, fd, errno); - return LIBUSB_ERROR_IO; - } - - return fd; -} - -/* Note only suitable for attributes which always read >= 0, < 0 is error */ -static int __read_sysfs_attr(struct libusb_context *ctx, - const char *devname, const char *attr) -{ - char filename[PATH_MAX]; - FILE *f; - int fd, r, value; - - snprintf(filename, PATH_MAX, "%s/%s/%s", SYSFS_DEVICE_PATH, - devname, attr); - fd = _open(filename, O_RDONLY); - if (fd == -1) { - if (errno == ENOENT) { - /* File doesn't exist. Assume the device has been - disconnected (see trac ticket #70). */ - return LIBUSB_ERROR_NO_DEVICE; - } - usbi_err(ctx, "open %s failed errno=%d", filename, errno); - return LIBUSB_ERROR_IO; - } - - f = fdopen(fd, "r"); - if (f == NULL) { - usbi_err(ctx, "fdopen %s failed errno=%d", filename, errno); - close(fd); - return LIBUSB_ERROR_OTHER; - } - - r = fscanf(f, "%d", &value); - fclose(f); - if (r != 1) { - usbi_err(ctx, "fscanf %s returned %d, errno=%d", attr, r, errno); - return LIBUSB_ERROR_NO_DEVICE; /* For unplug race (trac #70) */ - } - if (value < 0) { - usbi_err(ctx, "%s contains a negative value", filename); - return LIBUSB_ERROR_IO; - } - - return value; -} - -static int op_get_device_descriptor(struct libusb_device *dev, - unsigned char *buffer, int *host_endian) -{ - struct linux_device_priv *priv = _device_priv(dev); - - *host_endian = (priv->sysfs_dir && sysfs_has_descriptors) ? 0 : 1; - memcpy(buffer, priv->descriptors, DEVICE_DESC_LENGTH); - - return 0; -} - -/* read the bConfigurationValue for a device */ -static int sysfs_get_active_config(struct libusb_device *dev, int *config) -{ - char *endptr; - char tmp[5] = {0, 0, 0, 0, 0}; - long num; - int fd; - ssize_t r; - - fd = _open_sysfs_attr(dev, "bConfigurationValue"); - if (fd < 0) - return fd; - - r = read(fd, tmp, sizeof(tmp)); - close(fd); - if (r < 0) { - usbi_err(DEVICE_CTX(dev), - "read bConfigurationValue failed ret=%zd errno=%d", r, errno); - return LIBUSB_ERROR_IO; - } else if (r == 0) { - usbi_dbg("device unconfigured"); - *config = -1; - return 0; - } - - if (tmp[sizeof(tmp) - 1] != 0) { - usbi_err(DEVICE_CTX(dev), "not null-terminated?"); - return LIBUSB_ERROR_IO; - } else if (tmp[0] == 0) { - usbi_err(DEVICE_CTX(dev), "no configuration value?"); - return LIBUSB_ERROR_IO; - } - - num = strtol(tmp, &endptr, 10); - if (endptr == tmp) { - usbi_err(DEVICE_CTX(dev), "error converting '%s' to integer", tmp); - return LIBUSB_ERROR_IO; - } - - *config = (int) num; - return 0; -} - -int linux_get_device_address (struct libusb_context *ctx, int detached, - uint8_t *busnum, uint8_t *devaddr,const char *dev_node, - const char *sys_name, int fd) -{ - char proc_path[PATH_MAX], fd_path[PATH_MAX]; - int sysfs_attr; - ssize_t r; - - usbi_dbg("getting address for device: %s detached: %d", sys_name, detached); - /* can't use sysfs to read the bus and device number if the - * device has been detached */ - if (!sysfs_can_relate_devices || detached || NULL == sys_name) { - if (NULL == dev_node && fd >= 0) { - /* try to retrieve the device node from fd */ - snprintf(proc_path, PATH_MAX, "/proc/self/fd/%d", fd); - r = readlink(proc_path, fd_path, PATH_MAX); - if (r > 0) - dev_node = fd_path; - } - if (NULL == dev_node) { - return LIBUSB_ERROR_OTHER; - } - - /* will this work with all supported kernel versions? */ - if (!strncmp(dev_node, "/dev/bus/usb", 12)) { - sscanf (dev_node, "/dev/bus/usb/%hhu/%hhu", busnum, devaddr); - } else if (!strncmp(dev_node, "/proc/bus/usb", 13)) { - sscanf (dev_node, "/proc/bus/usb/%hhu/%hhu", busnum, devaddr); - } else { - return LIBUSB_ERROR_OTHER; - } - - return LIBUSB_SUCCESS; - } - - usbi_dbg("scan %s", sys_name); - - sysfs_attr = __read_sysfs_attr(ctx, sys_name, "busnum"); - if (0 > sysfs_attr) - return sysfs_attr; - if (sysfs_attr > 255) - return LIBUSB_ERROR_INVALID_PARAM; - *busnum = (uint8_t) sysfs_attr; - - sysfs_attr = __read_sysfs_attr(ctx, sys_name, "devnum"); - if (0 > sysfs_attr) - return sysfs_attr; - if (sysfs_attr > 255) - return LIBUSB_ERROR_INVALID_PARAM; - - *devaddr = (uint8_t) sysfs_attr; - - usbi_dbg("bus=%d dev=%d", *busnum, *devaddr); - - return LIBUSB_SUCCESS; -} - -/* Return offset of the next descriptor with the given type */ -static int seek_to_next_descriptor(struct libusb_context *ctx, - uint8_t descriptor_type, unsigned char *buffer, int size) -{ - struct usb_descriptor_header header; - int i; - - for (i = 0; size >= 0; i += header.bLength, size -= header.bLength) { - if (size == 0) - return LIBUSB_ERROR_NOT_FOUND; - - if (size < 2) { - usbi_err(ctx, "short descriptor read %d/2", size); - return LIBUSB_ERROR_IO; - } - usbi_parse_descriptor(buffer + i, "bb", &header, 0); - - if (i && header.bDescriptorType == descriptor_type) - return i; - } - usbi_err(ctx, "bLength overflow by %d bytes", -size); - return LIBUSB_ERROR_IO; -} - -/* Return offset to next config */ -static int seek_to_next_config(struct libusb_device *dev, - unsigned char *buffer, int size) -{ - struct libusb_context *ctx = DEVICE_CTX(dev); - struct linux_device_priv *priv = _device_priv(dev); - struct libusb_config_descriptor config; - - if (size == 0) - return LIBUSB_ERROR_NOT_FOUND; - - if (size < LIBUSB_DT_CONFIG_SIZE) { - usbi_err(ctx, "short descriptor read %d/%d", - size, LIBUSB_DT_CONFIG_SIZE); - return LIBUSB_ERROR_IO; - } - - usbi_parse_descriptor(buffer, "bbwbbbbb", &config, 0); - if (config.bDescriptorType != LIBUSB_DT_CONFIG) { - usbi_err(ctx, "descriptor is not a config desc (type 0x%02x)", - config.bDescriptorType); - return LIBUSB_ERROR_IO; - } - - /* - * In usbfs the config descriptors are config.wTotalLength bytes apart, - * with any short reads from the device appearing as holes in the file. - * - * In sysfs wTotalLength is ignored, instead the kernel returns a - * config descriptor with verified bLength fields, with descriptors - * with an invalid bLength removed. - */ - if (priv->sysfs_dir && sysfs_has_descriptors) { - int next = seek_to_next_descriptor(ctx, LIBUSB_DT_CONFIG, - buffer, size); - if (next == LIBUSB_ERROR_NOT_FOUND) - next = size; - if (next < 0) - return next; - - if (next != config.wTotalLength) - usbi_warn(ctx, "config length mismatch wTotalLength " - "%d real %d", config.wTotalLength, next); - return next; - } else { - if (config.wTotalLength < LIBUSB_DT_CONFIG_SIZE) { - usbi_err(ctx, "invalid wTotalLength %d", - config.wTotalLength); - return LIBUSB_ERROR_IO; - } else if (config.wTotalLength > size) { - usbi_warn(ctx, "short descriptor read %d/%d", - size, config.wTotalLength); - return size; - } else - return config.wTotalLength; - } -} - -static int op_get_config_descriptor_by_value(struct libusb_device *dev, - uint8_t value, unsigned char **buffer, int *host_endian) -{ - struct linux_device_priv *priv = _device_priv(dev); - unsigned char *descriptors = priv->descriptors; - int size = priv->descriptors_len; - struct libusb_config_descriptor *config; - - *buffer = NULL; - /* Unlike the device desc. config descs. are always in raw format */ - *host_endian = 0; - - /* Skip device header */ - descriptors += DEVICE_DESC_LENGTH; - size -= DEVICE_DESC_LENGTH; - - /* Seek till the config is found, or till "EOF" */ - while (1) { - int next = seek_to_next_config(dev, descriptors, size); - if (next < 0) - return next; - config = (struct libusb_config_descriptor *)descriptors; - if (config->bConfigurationValue == value) { - *buffer = descriptors; - return next; - } - size -= next; - descriptors += next; - } -} - -static int op_get_active_config_descriptor(struct libusb_device *dev, - unsigned char *buffer, size_t len, int *host_endian) -{ - struct linux_device_priv *priv = _device_priv(dev); - int r, config; - unsigned char *config_desc; - - if (priv->sysfs_dir && sysfs_can_relate_devices) { - r = sysfs_get_active_config(dev, &config); - if (r < 0) - return r; - } else { - /* Use cached bConfigurationValue */ - config = priv->active_config; - } - if (config == -1) - return LIBUSB_ERROR_NOT_FOUND; - - r = op_get_config_descriptor_by_value(dev, config, &config_desc, - host_endian); - if (r < 0) - return r; - - len = MIN(len, (size_t)r); - memcpy(buffer, config_desc, len); - return len; -} - -static int op_get_config_descriptor(struct libusb_device *dev, - uint8_t config_index, unsigned char *buffer, size_t len, int *host_endian) -{ - struct linux_device_priv *priv = _device_priv(dev); - unsigned char *descriptors = priv->descriptors; - int i, r, size = priv->descriptors_len; - - /* Unlike the device desc. config descs. are always in raw format */ - *host_endian = 0; - - /* Skip device header */ - descriptors += DEVICE_DESC_LENGTH; - size -= DEVICE_DESC_LENGTH; - - /* Seek till the config is found, or till "EOF" */ - for (i = 0; ; i++) { - r = seek_to_next_config(dev, descriptors, size); - if (r < 0) - return r; - if (i == config_index) - break; - size -= r; - descriptors += r; - } - - len = MIN(len, (size_t)r); - memcpy(buffer, descriptors, len); - return len; -} - -/* send a control message to retrieve active configuration */ -static int usbfs_get_active_config(struct libusb_device *dev, int fd) -{ - struct linux_device_priv *priv = _device_priv(dev); - unsigned char active_config = 0; - int r; - - struct usbfs_ctrltransfer ctrl = { - .bmRequestType = LIBUSB_ENDPOINT_IN, - .bRequest = LIBUSB_REQUEST_GET_CONFIGURATION, - .wValue = 0, - .wIndex = 0, - .wLength = 1, - .timeout = 1000, - .data = &active_config - }; - - r = ioctl(fd, IOCTL_USBFS_CONTROL, &ctrl); - if (r < 0) { - if (errno == ENODEV) - return LIBUSB_ERROR_NO_DEVICE; - - /* we hit this error path frequently with buggy devices :( */ - usbi_warn(DEVICE_CTX(dev), - "get_configuration failed ret=%d errno=%d", r, errno); - priv->active_config = -1; - } else { - if (active_config > 0) { - priv->active_config = active_config; - } else { - /* some buggy devices have a configuration 0, but we're - * reaching into the corner of a corner case here, so let's - * not support buggy devices in these circumstances. - * stick to the specs: a configuration value of 0 means - * unconfigured. */ - usbi_warn(DEVICE_CTX(dev), - "active cfg 0? assuming unconfigured device"); - priv->active_config = -1; - } - } - - return LIBUSB_SUCCESS; -} - -static int initialize_device(struct libusb_device *dev, uint8_t busnum, - uint8_t devaddr, const char *sysfs_dir, int wrapped_fd) -{ - struct linux_device_priv *priv = _device_priv(dev); - struct libusb_context *ctx = DEVICE_CTX(dev); - int descriptors_size = 512; /* Begin with a 1024 byte alloc */ - int fd, speed; - ssize_t r; - - dev->bus_number = busnum; - dev->device_address = devaddr; - - if (sysfs_dir) { - priv->sysfs_dir = strdup(sysfs_dir); - if (!priv->sysfs_dir) - return LIBUSB_ERROR_NO_MEM; - - /* Note speed can contain 1.5, in this case __read_sysfs_attr - will stop parsing at the '.' and return 1 */ - speed = __read_sysfs_attr(DEVICE_CTX(dev), sysfs_dir, "speed"); - if (speed >= 0) { - switch (speed) { - case 1: dev->speed = LIBUSB_SPEED_LOW; break; - case 12: dev->speed = LIBUSB_SPEED_FULL; break; - case 480: dev->speed = LIBUSB_SPEED_HIGH; break; - case 5000: dev->speed = LIBUSB_SPEED_SUPER; break; - case 10000: dev->speed = LIBUSB_SPEED_SUPER_PLUS; break; - default: - usbi_warn(DEVICE_CTX(dev), "Unknown device speed: %d Mbps", speed); - } - } - } - - /* cache descriptors in memory */ - if (sysfs_dir && sysfs_has_descriptors) { - fd = _open_sysfs_attr(dev, "descriptors"); - } else if (wrapped_fd < 0) { - fd = _get_usbfs_fd(dev, O_RDONLY, 0); - } else { - fd = wrapped_fd; - r = lseek(fd, 0, SEEK_SET); - if (r < 0) { - usbi_err(ctx, "seek failed ret=%zd errno=%d", r, errno); - return LIBUSB_ERROR_IO; - } - } - if (fd < 0) - return fd; - - do { - descriptors_size *= 2; - priv->descriptors = usbi_reallocf(priv->descriptors, - descriptors_size); - if (!priv->descriptors) { - if (fd != wrapped_fd) - close(fd); - return LIBUSB_ERROR_NO_MEM; - } - /* usbfs has holes in the file */ - if (!(sysfs_dir && sysfs_has_descriptors)) { - memset(priv->descriptors + priv->descriptors_len, - 0, descriptors_size - priv->descriptors_len); - } - r = read(fd, priv->descriptors + priv->descriptors_len, - descriptors_size - priv->descriptors_len); - if (r < 0) { - usbi_err(ctx, "read descriptor failed ret=%d errno=%d", - fd, errno); - if (fd != wrapped_fd) - close(fd); - return LIBUSB_ERROR_IO; - } - priv->descriptors_len += r; - } while (priv->descriptors_len == descriptors_size); - - if (fd != wrapped_fd) - close(fd); - - if (priv->descriptors_len < DEVICE_DESC_LENGTH) { - usbi_err(ctx, "short descriptor read (%d)", - priv->descriptors_len); - return LIBUSB_ERROR_IO; - } - - if (sysfs_dir && sysfs_can_relate_devices) - return LIBUSB_SUCCESS; - - /* cache active config */ - if (wrapped_fd < 0) - fd = _get_usbfs_fd(dev, O_RDWR, 1); - else - fd = wrapped_fd; - if (fd < 0) { - /* cannot send a control message to determine the active - * config. just assume the first one is active. */ - usbi_warn(ctx, "Missing rw usbfs access; cannot determine " - "active configuration descriptor"); - if (priv->descriptors_len >= - (DEVICE_DESC_LENGTH + LIBUSB_DT_CONFIG_SIZE)) { - struct libusb_config_descriptor config; - usbi_parse_descriptor( - priv->descriptors + DEVICE_DESC_LENGTH, - "bbwbbbbb", &config, 0); - priv->active_config = config.bConfigurationValue; - } else - priv->active_config = -1; /* No config dt */ - - return LIBUSB_SUCCESS; - } - - r = usbfs_get_active_config(dev, fd); - if (wrapped_fd < 0) - close(fd); - - return r; -} - -static int linux_get_parent_info(struct libusb_device *dev, const char *sysfs_dir) -{ - struct libusb_context *ctx = DEVICE_CTX(dev); - struct libusb_device *it; - char *parent_sysfs_dir, *tmp; - int ret, add_parent = 1; - - /* XXX -- can we figure out the topology when using usbfs? */ - if (NULL == sysfs_dir || 0 == strncmp(sysfs_dir, "usb", 3)) { - /* either using usbfs or finding the parent of a root hub */ - return LIBUSB_SUCCESS; - } - - parent_sysfs_dir = strdup(sysfs_dir); - if (NULL == parent_sysfs_dir) { - return LIBUSB_ERROR_NO_MEM; - } - if (NULL != (tmp = strrchr(parent_sysfs_dir, '.')) || - NULL != (tmp = strrchr(parent_sysfs_dir, '-'))) { - dev->port_number = atoi(tmp + 1); - *tmp = '\0'; - } else { - usbi_warn(ctx, "Can not parse sysfs_dir: %s, no parent info", - parent_sysfs_dir); - free (parent_sysfs_dir); - return LIBUSB_SUCCESS; - } - - /* is the parent a root hub? */ - if (NULL == strchr(parent_sysfs_dir, '-')) { - tmp = parent_sysfs_dir; - ret = asprintf (&parent_sysfs_dir, "usb%s", tmp); - free (tmp); - if (0 > ret) { - return LIBUSB_ERROR_NO_MEM; - } - } - -retry: - /* find the parent in the context */ - usbi_mutex_lock(&ctx->usb_devs_lock); - list_for_each_entry(it, &ctx->usb_devs, list, struct libusb_device) { - struct linux_device_priv *priv = _device_priv(it); - if (priv->sysfs_dir) { - if (0 == strcmp (priv->sysfs_dir, parent_sysfs_dir)) { - dev->parent_dev = libusb_ref_device(it); - break; - } - } - } - usbi_mutex_unlock(&ctx->usb_devs_lock); - - if (!dev->parent_dev && add_parent) { - usbi_dbg("parent_dev %s not enumerated yet, enumerating now", - parent_sysfs_dir); - sysfs_scan_device(ctx, parent_sysfs_dir); - add_parent = 0; - goto retry; - } - - usbi_dbg("Dev %p (%s) has parent %p (%s) port %d", dev, sysfs_dir, - dev->parent_dev, parent_sysfs_dir, dev->port_number); - - free (parent_sysfs_dir); - - return LIBUSB_SUCCESS; -} - -int linux_enumerate_device(struct libusb_context *ctx, - uint8_t busnum, uint8_t devaddr, const char *sysfs_dir) -{ - unsigned long session_id; - struct libusb_device *dev; - int r = 0; - - /* FIXME: session ID is not guaranteed unique as addresses can wrap and - * will be reused. instead we should add a simple sysfs attribute with - * a session ID. */ - session_id = busnum << 8 | devaddr; - usbi_dbg("busnum %d devaddr %d session_id %ld", busnum, devaddr, - session_id); - - dev = usbi_get_device_by_session_id(ctx, session_id); - if (dev) { - /* device already exists in the context */ - usbi_dbg("session_id %ld already exists", session_id); - libusb_unref_device(dev); - return LIBUSB_SUCCESS; - } - - usbi_dbg("allocating new device for %d/%d (session %ld)", - busnum, devaddr, session_id); - dev = usbi_alloc_device(ctx, session_id); - if (!dev) - return LIBUSB_ERROR_NO_MEM; - - r = initialize_device(dev, busnum, devaddr, sysfs_dir, -1); - if (r < 0) - goto out; - r = usbi_sanitize_device(dev); - if (r < 0) - goto out; - - r = linux_get_parent_info(dev, sysfs_dir); - if (r < 0) - goto out; -out: - if (r < 0) - libusb_unref_device(dev); - else - usbi_connect_device(dev); - - return r; -} - -void linux_hotplug_enumerate(uint8_t busnum, uint8_t devaddr, const char *sys_name) -{ - struct libusb_context *ctx; - - usbi_mutex_static_lock(&active_contexts_lock); - list_for_each_entry(ctx, &active_contexts_list, list, struct libusb_context) { - linux_enumerate_device(ctx, busnum, devaddr, sys_name); - } - usbi_mutex_static_unlock(&active_contexts_lock); -} - -void linux_device_disconnected(uint8_t busnum, uint8_t devaddr) -{ - struct libusb_context *ctx; - struct libusb_device *dev; - unsigned long session_id = busnum << 8 | devaddr; - - usbi_mutex_static_lock(&active_contexts_lock); - list_for_each_entry(ctx, &active_contexts_list, list, struct libusb_context) { - dev = usbi_get_device_by_session_id (ctx, session_id); - if (NULL != dev) { - usbi_disconnect_device (dev); - libusb_unref_device(dev); - } else { - usbi_dbg("device not found for session %lx", session_id); - } - } - usbi_mutex_static_unlock(&active_contexts_lock); -} - -#if !defined(USE_UDEV) -/* open a bus directory and adds all discovered devices to the context */ -static int usbfs_scan_busdir(struct libusb_context *ctx, uint8_t busnum) -{ - DIR *dir; - char dirpath[PATH_MAX]; - struct dirent *entry; - int r = LIBUSB_ERROR_IO; - - snprintf(dirpath, PATH_MAX, "%s/%03d", usbfs_path, busnum); - usbi_dbg("%s", dirpath); - dir = opendir(dirpath); - if (!dir) { - usbi_err(ctx, "opendir '%s' failed, errno=%d", dirpath, errno); - /* FIXME: should handle valid race conditions like hub unplugged - * during directory iteration - this is not an error */ - return r; - } - - while ((entry = readdir(dir))) { - int devaddr; - - if (entry->d_name[0] == '.') - continue; - - devaddr = atoi(entry->d_name); - if (devaddr == 0) { - usbi_dbg("unknown dir entry %s", entry->d_name); - continue; - } - - if (linux_enumerate_device(ctx, busnum, (uint8_t) devaddr, NULL)) { - usbi_dbg("failed to enumerate dir entry %s", entry->d_name); - continue; - } - - r = 0; - } - - closedir(dir); - return r; -} - -static int usbfs_get_device_list(struct libusb_context *ctx) -{ - struct dirent *entry; - DIR *buses = opendir(usbfs_path); - int r = 0; - - if (!buses) { - usbi_err(ctx, "opendir buses failed errno=%d", errno); - return LIBUSB_ERROR_IO; - } - - while ((entry = readdir(buses))) { - int busnum; - - if (entry->d_name[0] == '.') - continue; - - if (usbdev_names) { - int devaddr; - if (!_is_usbdev_entry(entry, &busnum, &devaddr)) - continue; - - r = linux_enumerate_device(ctx, busnum, (uint8_t) devaddr, NULL); - if (r < 0) { - usbi_dbg("failed to enumerate dir entry %s", entry->d_name); - continue; - } - } else { - busnum = atoi(entry->d_name); - if (busnum == 0) { - usbi_dbg("unknown dir entry %s", entry->d_name); - continue; - } - - r = usbfs_scan_busdir(ctx, busnum); - if (r < 0) - break; - } - } - - closedir(buses); - return r; - -} -#endif - -static int sysfs_scan_device(struct libusb_context *ctx, const char *devname) -{ - uint8_t busnum, devaddr; - int ret; - - ret = linux_get_device_address (ctx, 0, &busnum, &devaddr, NULL, devname, -1); - if (LIBUSB_SUCCESS != ret) { - return ret; - } - - return linux_enumerate_device(ctx, busnum & 0xff, devaddr & 0xff, - devname); -} - -#if !defined(USE_UDEV) -static int sysfs_get_device_list(struct libusb_context *ctx) -{ - DIR *devices = opendir(SYSFS_DEVICE_PATH); - struct dirent *entry; - int num_devices = 0; - int num_enumerated = 0; - - if (!devices) { - usbi_err(ctx, "opendir devices failed errno=%d", errno); - return LIBUSB_ERROR_IO; - } - - while ((entry = readdir(devices))) { - if ((!isdigit(entry->d_name[0]) && strncmp(entry->d_name, "usb", 3)) - || strchr(entry->d_name, ':')) - continue; - - num_devices++; - - if (sysfs_scan_device(ctx, entry->d_name)) { - usbi_dbg("failed to enumerate dir entry %s", entry->d_name); - continue; - } - - num_enumerated++; - } - - closedir(devices); - - /* successful if at least one device was enumerated or no devices were found */ - if (num_enumerated || !num_devices) - return LIBUSB_SUCCESS; - else - return LIBUSB_ERROR_IO; -} - -static int linux_default_scan_devices (struct libusb_context *ctx) -{ - /* we can retrieve device list and descriptors from sysfs or usbfs. - * sysfs is preferable, because if we use usbfs we end up resuming - * any autosuspended USB devices. however, sysfs is not available - * everywhere, so we need a usbfs fallback too. - * - * as described in the "sysfs vs usbfs" comment at the top of this - * file, sometimes we have sysfs but not enough information to - * relate sysfs devices to usbfs nodes. op_init() determines the - * adequacy of sysfs and sets sysfs_can_relate_devices. - */ - if (sysfs_can_relate_devices != 0) - return sysfs_get_device_list(ctx); - else - return usbfs_get_device_list(ctx); -} -#endif - -static int initialize_handle(struct libusb_device_handle *handle, int fd) -{ - struct linux_device_handle_priv *hpriv = _device_handle_priv(handle); - int r; - - hpriv->fd = fd; - - r = ioctl(fd, IOCTL_USBFS_GET_CAPABILITIES, &hpriv->caps); - if (r < 0) { - if (errno == ENOTTY) - usbi_dbg("getcap not available"); - else - usbi_err(HANDLE_CTX(handle), "getcap failed (%d)", errno); - hpriv->caps = 0; - if (supports_flag_zero_packet) - hpriv->caps |= USBFS_CAP_ZERO_PACKET; - if (supports_flag_bulk_continuation) - hpriv->caps |= USBFS_CAP_BULK_CONTINUATION; - } - - return usbi_add_pollfd(HANDLE_CTX(handle), hpriv->fd, POLLOUT); -} - -static int op_wrap_sys_device(struct libusb_context *ctx, - struct libusb_device_handle *handle, intptr_t sys_dev) -{ - struct linux_device_handle_priv *hpriv = _device_handle_priv(handle); - int fd = (int)sys_dev; - uint8_t busnum, devaddr; - struct usbfs_connectinfo ci; - struct libusb_device *dev; - int r; - - r = linux_get_device_address(ctx, 1, &busnum, &devaddr, NULL, NULL, fd); - if (r < 0) { - r = ioctl(fd, IOCTL_USBFS_CONNECTINFO, &ci); - if (r < 0) { - usbi_err(ctx, "connectinfo failed (%d)", errno); - return LIBUSB_ERROR_IO; - } - /* There is no ioctl to get the bus number. We choose 0 here - * as linux starts numbering buses from 1. */ - busnum = 0; - devaddr = ci.devnum; - } - - /* Session id is unused as we do not add the device to the list of - * connected devices. */ - usbi_dbg("allocating new device for fd %d", fd); - dev = usbi_alloc_device(ctx, 0); - if (!dev) - return LIBUSB_ERROR_NO_MEM; - - r = initialize_device(dev, busnum, devaddr, NULL, fd); - if (r < 0) - goto out; - r = usbi_sanitize_device(dev); - if (r < 0) - goto out; - /* Consider the device as connected, but do not add it to the managed - * device list. */ - dev->attached = 1; - handle->dev = dev; - - r = initialize_handle(handle, fd); - hpriv->fd_keep = 1; - -out: - if (r < 0) - libusb_unref_device(dev); - return r; -} - -static int op_open(struct libusb_device_handle *handle) -{ - int fd, r; - - fd = _get_usbfs_fd(handle->dev, O_RDWR, 0); - if (fd < 0) { - if (fd == LIBUSB_ERROR_NO_DEVICE) { - /* device will still be marked as attached if hotplug monitor thread - * hasn't processed remove event yet */ - usbi_mutex_static_lock(&linux_hotplug_lock); - if (handle->dev->attached) { - usbi_dbg("open failed with no device, but device still attached"); - linux_device_disconnected(handle->dev->bus_number, - handle->dev->device_address); - } - usbi_mutex_static_unlock(&linux_hotplug_lock); - } - return fd; - } - - r = initialize_handle(handle, fd); - if (r < 0) - close(fd); - - return r; -} - -static void op_close(struct libusb_device_handle *dev_handle) -{ - struct linux_device_handle_priv *hpriv = _device_handle_priv(dev_handle); - /* fd may have already been removed by POLLERR condition in op_handle_events() */ - if (!hpriv->fd_removed) - usbi_remove_pollfd(HANDLE_CTX(dev_handle), hpriv->fd); - if (!hpriv->fd_keep) - close(hpriv->fd); -} - -static int op_get_configuration(struct libusb_device_handle *handle, - int *config) -{ - struct linux_device_priv *priv = _device_priv(handle->dev); - int r; - - if (priv->sysfs_dir && sysfs_can_relate_devices) { - r = sysfs_get_active_config(handle->dev, config); - } else { - r = usbfs_get_active_config(handle->dev, - _device_handle_priv(handle)->fd); - if (r == LIBUSB_SUCCESS) - *config = priv->active_config; - } - if (r < 0) - return r; - - if (*config == -1) { - usbi_err(HANDLE_CTX(handle), "device unconfigured"); - *config = 0; - } - - return 0; -} - -static int op_set_configuration(struct libusb_device_handle *handle, int config) -{ - struct linux_device_priv *priv = _device_priv(handle->dev); - int fd = _device_handle_priv(handle)->fd; - int r = ioctl(fd, IOCTL_USBFS_SETCONFIG, &config); - if (r) { - if (errno == EINVAL) - return LIBUSB_ERROR_NOT_FOUND; - else if (errno == EBUSY) - return LIBUSB_ERROR_BUSY; - else if (errno == ENODEV) - return LIBUSB_ERROR_NO_DEVICE; - - usbi_err(HANDLE_CTX(handle), "failed, error %d errno %d", r, errno); - return LIBUSB_ERROR_OTHER; - } - - /* update our cached active config descriptor */ - priv->active_config = config; - - return LIBUSB_SUCCESS; -} - -static int claim_interface(struct libusb_device_handle *handle, int iface) -{ - int fd = _device_handle_priv(handle)->fd; - int r = ioctl(fd, IOCTL_USBFS_CLAIMINTF, &iface); - if (r) { - if (errno == ENOENT) - return LIBUSB_ERROR_NOT_FOUND; - else if (errno == EBUSY) - return LIBUSB_ERROR_BUSY; - else if (errno == ENODEV) - return LIBUSB_ERROR_NO_DEVICE; - - usbi_err(HANDLE_CTX(handle), - "claim interface failed, error %d errno %d", r, errno); - return LIBUSB_ERROR_OTHER; - } - return 0; -} - -static int release_interface(struct libusb_device_handle *handle, int iface) -{ - int fd = _device_handle_priv(handle)->fd; - int r = ioctl(fd, IOCTL_USBFS_RELEASEINTF, &iface); - if (r) { - if (errno == ENODEV) - return LIBUSB_ERROR_NO_DEVICE; - - usbi_err(HANDLE_CTX(handle), - "release interface failed, error %d errno %d", r, errno); - return LIBUSB_ERROR_OTHER; - } - return 0; -} - -static int op_set_interface(struct libusb_device_handle *handle, int iface, - int altsetting) -{ - int fd = _device_handle_priv(handle)->fd; - struct usbfs_setinterface setintf; - int r; - - setintf.interface = iface; - setintf.altsetting = altsetting; - r = ioctl(fd, IOCTL_USBFS_SETINTF, &setintf); - if (r) { - if (errno == EINVAL) - return LIBUSB_ERROR_NOT_FOUND; - else if (errno == ENODEV) - return LIBUSB_ERROR_NO_DEVICE; - - usbi_err(HANDLE_CTX(handle), - "setintf failed error %d errno %d", r, errno); - return LIBUSB_ERROR_OTHER; - } - - return 0; -} - -static int op_clear_halt(struct libusb_device_handle *handle, - unsigned char endpoint) -{ - int fd = _device_handle_priv(handle)->fd; - unsigned int _endpoint = endpoint; - int r = ioctl(fd, IOCTL_USBFS_CLEAR_HALT, &_endpoint); - if (r) { - if (errno == ENOENT) - return LIBUSB_ERROR_NOT_FOUND; - else if (errno == ENODEV) - return LIBUSB_ERROR_NO_DEVICE; - - usbi_err(HANDLE_CTX(handle), - "clear_halt failed error %d errno %d", r, errno); - return LIBUSB_ERROR_OTHER; - } - - return 0; -} - -static int op_reset_device(struct libusb_device_handle *handle) -{ - int fd = _device_handle_priv(handle)->fd; - int i, r, ret = 0; - - /* Doing a device reset will cause the usbfs driver to get unbound - from any interfaces it is bound to. By voluntarily unbinding - the usbfs driver ourself, we stop the kernel from rebinding - the interface after reset (which would end up with the interface - getting bound to the in kernel driver if any). */ - for (i = 0; i < USB_MAXINTERFACES; i++) { - if (handle->claimed_interfaces & (1L << i)) { - release_interface(handle, i); - } - } - - usbi_mutex_lock(&handle->lock); - r = ioctl(fd, IOCTL_USBFS_RESET, NULL); - if (r) { - if (errno == ENODEV) { - ret = LIBUSB_ERROR_NOT_FOUND; - goto out; - } - - usbi_err(HANDLE_CTX(handle), - "reset failed error %d errno %d", r, errno); - ret = LIBUSB_ERROR_OTHER; - goto out; - } - - /* And re-claim any interfaces which were claimed before the reset */ - for (i = 0; i < USB_MAXINTERFACES; i++) { - if (handle->claimed_interfaces & (1L << i)) { - /* - * A driver may have completed modprobing during - * IOCTL_USBFS_RESET, and bound itself as soon as - * IOCTL_USBFS_RESET released the device lock - */ - r = detach_kernel_driver_and_claim(handle, i); - if (r) { - usbi_warn(HANDLE_CTX(handle), - "failed to re-claim interface %d after reset: %s", - i, libusb_error_name(r)); - handle->claimed_interfaces &= ~(1L << i); - ret = LIBUSB_ERROR_NOT_FOUND; - } - } - } -out: - usbi_mutex_unlock(&handle->lock); - return ret; -} - -static int do_streams_ioctl(struct libusb_device_handle *handle, long req, - uint32_t num_streams, unsigned char *endpoints, int num_endpoints) -{ - int r, fd = _device_handle_priv(handle)->fd; - struct usbfs_streams *streams; - - if (num_endpoints > 30) /* Max 15 in + 15 out eps */ - return LIBUSB_ERROR_INVALID_PARAM; - - streams = malloc(sizeof(struct usbfs_streams) + num_endpoints); - if (!streams) - return LIBUSB_ERROR_NO_MEM; - - streams->num_streams = num_streams; - streams->num_eps = num_endpoints; - memcpy(streams->eps, endpoints, num_endpoints); - - r = ioctl(fd, req, streams); - - free(streams); - - if (r < 0) { - if (errno == ENOTTY) - return LIBUSB_ERROR_NOT_SUPPORTED; - else if (errno == EINVAL) - return LIBUSB_ERROR_INVALID_PARAM; - else if (errno == ENODEV) - return LIBUSB_ERROR_NO_DEVICE; - - usbi_err(HANDLE_CTX(handle), - "streams-ioctl failed error %d errno %d", r, errno); - return LIBUSB_ERROR_OTHER; - } - return r; -} - -static int op_alloc_streams(struct libusb_device_handle *handle, - uint32_t num_streams, unsigned char *endpoints, int num_endpoints) -{ - return do_streams_ioctl(handle, IOCTL_USBFS_ALLOC_STREAMS, - num_streams, endpoints, num_endpoints); -} - -static int op_free_streams(struct libusb_device_handle *handle, - unsigned char *endpoints, int num_endpoints) -{ - return do_streams_ioctl(handle, IOCTL_USBFS_FREE_STREAMS, 0, - endpoints, num_endpoints); -} - -static unsigned char *op_dev_mem_alloc(struct libusb_device_handle *handle, - size_t len) -{ - struct linux_device_handle_priv *hpriv = _device_handle_priv(handle); - unsigned char *buffer = (unsigned char *)mmap(NULL, len, - PROT_READ | PROT_WRITE, MAP_SHARED, hpriv->fd, 0); - if (buffer == MAP_FAILED) { - usbi_err(HANDLE_CTX(handle), "alloc dev mem failed errno %d", - errno); - return NULL; - } - return buffer; -} - -static int op_dev_mem_free(struct libusb_device_handle *handle, - unsigned char *buffer, size_t len) -{ - if (munmap(buffer, len) != 0) { - usbi_err(HANDLE_CTX(handle), "free dev mem failed errno %d", - errno); - return LIBUSB_ERROR_OTHER; - } else { - return LIBUSB_SUCCESS; - } -} - -static int op_kernel_driver_active(struct libusb_device_handle *handle, - int interface) -{ - int fd = _device_handle_priv(handle)->fd; - struct usbfs_getdriver getdrv; - int r; - - getdrv.interface = interface; - r = ioctl(fd, IOCTL_USBFS_GETDRIVER, &getdrv); - if (r) { - if (errno == ENODATA) - return 0; - else if (errno == ENODEV) - return LIBUSB_ERROR_NO_DEVICE; - - usbi_err(HANDLE_CTX(handle), - "get driver failed error %d errno %d", r, errno); - return LIBUSB_ERROR_OTHER; - } - - return (strcmp(getdrv.driver, "usbfs") == 0) ? 0 : 1; -} - -static int op_detach_kernel_driver(struct libusb_device_handle *handle, - int interface) -{ - int fd = _device_handle_priv(handle)->fd; - struct usbfs_ioctl command; - struct usbfs_getdriver getdrv; - int r; - - command.ifno = interface; - command.ioctl_code = IOCTL_USBFS_DISCONNECT; - command.data = NULL; - - getdrv.interface = interface; - r = ioctl(fd, IOCTL_USBFS_GETDRIVER, &getdrv); - if (r == 0 && strcmp(getdrv.driver, "usbfs") == 0) - return LIBUSB_ERROR_NOT_FOUND; - - r = ioctl(fd, IOCTL_USBFS_IOCTL, &command); - if (r) { - if (errno == ENODATA) - return LIBUSB_ERROR_NOT_FOUND; - else if (errno == EINVAL) - return LIBUSB_ERROR_INVALID_PARAM; - else if (errno == ENODEV) - return LIBUSB_ERROR_NO_DEVICE; - - usbi_err(HANDLE_CTX(handle), - "detach failed error %d errno %d", r, errno); - return LIBUSB_ERROR_OTHER; - } - - return 0; -} - -static int op_attach_kernel_driver(struct libusb_device_handle *handle, - int interface) -{ - int fd = _device_handle_priv(handle)->fd; - struct usbfs_ioctl command; - int r; - - command.ifno = interface; - command.ioctl_code = IOCTL_USBFS_CONNECT; - command.data = NULL; - - r = ioctl(fd, IOCTL_USBFS_IOCTL, &command); - if (r < 0) { - if (errno == ENODATA) - return LIBUSB_ERROR_NOT_FOUND; - else if (errno == EINVAL) - return LIBUSB_ERROR_INVALID_PARAM; - else if (errno == ENODEV) - return LIBUSB_ERROR_NO_DEVICE; - else if (errno == EBUSY) - return LIBUSB_ERROR_BUSY; - - usbi_err(HANDLE_CTX(handle), - "attach failed error %d errno %d", r, errno); - return LIBUSB_ERROR_OTHER; - } else if (r == 0) { - return LIBUSB_ERROR_NOT_FOUND; - } - - return 0; -} - -static int detach_kernel_driver_and_claim(struct libusb_device_handle *handle, - int interface) -{ - struct usbfs_disconnect_claim dc; - int r, fd = _device_handle_priv(handle)->fd; - - dc.interface = interface; - strcpy(dc.driver, "usbfs"); - dc.flags = USBFS_DISCONNECT_CLAIM_EXCEPT_DRIVER; - r = ioctl(fd, IOCTL_USBFS_DISCONNECT_CLAIM, &dc); - if (r != 0 && errno != ENOTTY) { - switch (errno) { - case EBUSY: - return LIBUSB_ERROR_BUSY; - case EINVAL: - return LIBUSB_ERROR_INVALID_PARAM; - case ENODEV: - return LIBUSB_ERROR_NO_DEVICE; - } - usbi_err(HANDLE_CTX(handle), - "disconnect-and-claim failed errno %d", errno); - return LIBUSB_ERROR_OTHER; - } else if (r == 0) - return 0; - - /* Fallback code for kernels which don't support the - disconnect-and-claim ioctl */ - r = op_detach_kernel_driver(handle, interface); - if (r != 0 && r != LIBUSB_ERROR_NOT_FOUND) - return r; - - return claim_interface(handle, interface); -} - -static int op_claim_interface(struct libusb_device_handle *handle, int iface) -{ - if (handle->auto_detach_kernel_driver) - return detach_kernel_driver_and_claim(handle, iface); - else - return claim_interface(handle, iface); -} - -static int op_release_interface(struct libusb_device_handle *handle, int iface) -{ - int r; - - r = release_interface(handle, iface); - if (r) - return r; - - if (handle->auto_detach_kernel_driver) - op_attach_kernel_driver(handle, iface); - - return 0; -} - -static void op_destroy_device(struct libusb_device *dev) -{ - struct linux_device_priv *priv = _device_priv(dev); - if (priv->descriptors) - free(priv->descriptors); - if (priv->sysfs_dir) - free(priv->sysfs_dir); -} - -/* URBs are discarded in reverse order of submission to avoid races. */ -static int discard_urbs(struct usbi_transfer *itransfer, int first, int last_plus_one) -{ - struct libusb_transfer *transfer = - USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); - struct linux_transfer_priv *tpriv = - usbi_transfer_get_os_priv(itransfer); - struct linux_device_handle_priv *dpriv = - _device_handle_priv(transfer->dev_handle); - int i, ret = 0; - struct usbfs_urb *urb; - - for (i = last_plus_one - 1; i >= first; i--) { - if (LIBUSB_TRANSFER_TYPE_ISOCHRONOUS == transfer->type) - urb = tpriv->iso_urbs[i]; - else - urb = &tpriv->urbs[i]; - - if (0 == ioctl(dpriv->fd, IOCTL_USBFS_DISCARDURB, urb)) - continue; - - if (EINVAL == errno) { - usbi_dbg("URB not found --> assuming ready to be reaped"); - if (i == (last_plus_one - 1)) - ret = LIBUSB_ERROR_NOT_FOUND; - } else if (ENODEV == errno) { - usbi_dbg("Device not found for URB --> assuming ready to be reaped"); - ret = LIBUSB_ERROR_NO_DEVICE; - } else { - usbi_warn(TRANSFER_CTX(transfer), - "unrecognised discard errno %d", errno); - ret = LIBUSB_ERROR_OTHER; - } - } - return ret; -} - -static void free_iso_urbs(struct linux_transfer_priv *tpriv) -{ - int i; - for (i = 0; i < tpriv->num_urbs; i++) { - struct usbfs_urb *urb = tpriv->iso_urbs[i]; - if (!urb) - break; - free(urb); - } - - free(tpriv->iso_urbs); - tpriv->iso_urbs = NULL; -} - -static int submit_bulk_transfer(struct usbi_transfer *itransfer) -{ - struct libusb_transfer *transfer = - USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); - struct linux_transfer_priv *tpriv = usbi_transfer_get_os_priv(itransfer); - struct linux_device_handle_priv *dpriv = - _device_handle_priv(transfer->dev_handle); - struct usbfs_urb *urbs; - int is_out = (transfer->endpoint & LIBUSB_ENDPOINT_DIR_MASK) - == LIBUSB_ENDPOINT_OUT; - int bulk_buffer_len, use_bulk_continuation; - int r; - int i; - - if (is_out && (transfer->flags & LIBUSB_TRANSFER_ADD_ZERO_PACKET) && - !(dpriv->caps & USBFS_CAP_ZERO_PACKET)) - return LIBUSB_ERROR_NOT_SUPPORTED; - - /* - * Older versions of usbfs place a 16kb limit on bulk URBs. We work - * around this by splitting large transfers into 16k blocks, and then - * submit all urbs at once. it would be simpler to submit one urb at - * a time, but there is a big performance gain doing it this way. - * - * Newer versions lift the 16k limit (USBFS_CAP_NO_PACKET_SIZE_LIM), - * using arbritary large transfers can still be a bad idea though, as - * the kernel needs to allocate physical contiguous memory for this, - * which may fail for large buffers. - * - * The kernel solves this problem by splitting the transfer into - * blocks itself when the host-controller is scatter-gather capable - * (USBFS_CAP_BULK_SCATTER_GATHER), which most controllers are. - * - * Last, there is the issue of short-transfers when splitting, for - * short split-transfers to work reliable USBFS_CAP_BULK_CONTINUATION - * is needed, but this is not always available. - */ - if (dpriv->caps & USBFS_CAP_BULK_SCATTER_GATHER) { - /* Good! Just submit everything in one go */ - bulk_buffer_len = transfer->length ? transfer->length : 1; - use_bulk_continuation = 0; - } else if (dpriv->caps & USBFS_CAP_BULK_CONTINUATION) { - /* Split the transfers and use bulk-continuation to - avoid issues with short-transfers */ - bulk_buffer_len = MAX_BULK_BUFFER_LENGTH; - use_bulk_continuation = 1; - } else if (dpriv->caps & USBFS_CAP_NO_PACKET_SIZE_LIM) { - /* Don't split, assume the kernel can alloc the buffer - (otherwise the submit will fail with -ENOMEM) */ - bulk_buffer_len = transfer->length ? transfer->length : 1; - use_bulk_continuation = 0; - } else { - /* Bad, splitting without bulk-continuation, short transfers - which end before the last urb will not work reliable! */ - /* Note we don't warn here as this is "normal" on kernels < - 2.6.32 and not a problem for most applications */ - bulk_buffer_len = MAX_BULK_BUFFER_LENGTH; - use_bulk_continuation = 0; - } - - int num_urbs = transfer->length / bulk_buffer_len; - int last_urb_partial = 0; - - if (transfer->length == 0) { - num_urbs = 1; - } else if ((transfer->length % bulk_buffer_len) > 0) { - last_urb_partial = 1; - num_urbs++; - } - usbi_dbg("need %d urbs for new transfer with length %d", num_urbs, - transfer->length); - urbs = calloc(num_urbs, sizeof(struct usbfs_urb)); - if (!urbs) - return LIBUSB_ERROR_NO_MEM; - tpriv->urbs = urbs; - tpriv->num_urbs = num_urbs; - tpriv->num_retired = 0; - tpriv->reap_action = NORMAL; - tpriv->reap_status = LIBUSB_TRANSFER_COMPLETED; - - for (i = 0; i < num_urbs; i++) { - struct usbfs_urb *urb = &urbs[i]; - urb->usercontext = itransfer; - switch (transfer->type) { - case LIBUSB_TRANSFER_TYPE_BULK: - urb->type = USBFS_URB_TYPE_BULK; - urb->stream_id = 0; - break; - case LIBUSB_TRANSFER_TYPE_BULK_STREAM: - urb->type = USBFS_URB_TYPE_BULK; - urb->stream_id = itransfer->stream_id; - break; - case LIBUSB_TRANSFER_TYPE_INTERRUPT: - urb->type = USBFS_URB_TYPE_INTERRUPT; - break; - } - urb->endpoint = transfer->endpoint; - urb->buffer = transfer->buffer + (i * bulk_buffer_len); - /* don't set the short not ok flag for the last URB */ - if (use_bulk_continuation && !is_out && (i < num_urbs - 1)) - urb->flags = USBFS_URB_SHORT_NOT_OK; - if (i == num_urbs - 1 && last_urb_partial) - urb->buffer_length = transfer->length % bulk_buffer_len; - else if (transfer->length == 0) - urb->buffer_length = 0; - else - urb->buffer_length = bulk_buffer_len; - - if (i > 0 && use_bulk_continuation) - urb->flags |= USBFS_URB_BULK_CONTINUATION; - - /* we have already checked that the flag is supported */ - if (is_out && i == num_urbs - 1 && - transfer->flags & LIBUSB_TRANSFER_ADD_ZERO_PACKET) - urb->flags |= USBFS_URB_ZERO_PACKET; - - r = ioctl(dpriv->fd, IOCTL_USBFS_SUBMITURB, urb); - if (r < 0) { - if (errno == ENODEV) { - r = LIBUSB_ERROR_NO_DEVICE; - } else { - usbi_err(TRANSFER_CTX(transfer), - "submiturb failed error %d errno=%d", r, errno); - r = LIBUSB_ERROR_IO; - } - - /* if the first URB submission fails, we can simply free up and - * return failure immediately. */ - if (i == 0) { - usbi_dbg("first URB failed, easy peasy"); - free(urbs); - tpriv->urbs = NULL; - return r; - } - - /* if it's not the first URB that failed, the situation is a bit - * tricky. we may need to discard all previous URBs. there are - * complications: - * - discarding is asynchronous - discarded urbs will be reaped - * later. the user must not have freed the transfer when the - * discarded URBs are reaped, otherwise src will be using - * freed memory. - * - the earlier URBs may have completed successfully and we do - * not want to throw away any data. - * - this URB failing may be no error; EREMOTEIO means that - * this transfer simply didn't need all the URBs we submitted - * so, we report that the transfer was submitted successfully and - * in case of error we discard all previous URBs. later when - * the final reap completes we can report error to the user, - * or success if an earlier URB was completed successfully. - */ - tpriv->reap_action = EREMOTEIO == errno ? COMPLETED_EARLY : SUBMIT_FAILED; - - /* The URBs we haven't submitted yet we count as already - * retired. */ - tpriv->num_retired += num_urbs - i; - - /* If we completed short then don't try to discard. */ - if (COMPLETED_EARLY == tpriv->reap_action) - return 0; - - discard_urbs(itransfer, 0, i); - - usbi_dbg("reporting successful submission but waiting for %d " - "discards before reporting error", i); - return 0; - } - } - - return 0; -} - -static int submit_iso_transfer(struct usbi_transfer *itransfer) -{ - struct libusb_transfer *transfer = - USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); - struct linux_transfer_priv *tpriv = usbi_transfer_get_os_priv(itransfer); - struct linux_device_handle_priv *dpriv = - _device_handle_priv(transfer->dev_handle); - struct usbfs_urb **urbs; - int num_packets = transfer->num_iso_packets; - int num_packets_remaining; - int i, j; - int num_urbs; - unsigned int packet_len; - unsigned int total_len = 0; - unsigned char *urb_buffer = transfer->buffer; - - if (num_packets < 1) - return LIBUSB_ERROR_INVALID_PARAM; - - /* usbfs places arbitrary limits on iso URBs. this limit has changed - * at least three times, but we attempt to detect this limit during - * init and check it here. if the kernel rejects the request due to - * its size, we return an error indicating such to the user. - */ - for (i = 0; i < num_packets; i++) { - packet_len = transfer->iso_packet_desc[i].length; - - if (packet_len > max_iso_packet_len) { - usbi_warn(TRANSFER_CTX(transfer), - "iso packet length of %u bytes exceeds maximum of %u bytes", - packet_len, max_iso_packet_len); - return LIBUSB_ERROR_INVALID_PARAM; - } - - total_len += packet_len; - } - - if (transfer->length < (int)total_len) - return LIBUSB_ERROR_INVALID_PARAM; - - /* usbfs limits the number of iso packets per URB */ - num_urbs = (num_packets + (MAX_ISO_PACKETS_PER_URB - 1)) / MAX_ISO_PACKETS_PER_URB; - - usbi_dbg("need %d urbs for new transfer with length %d", num_urbs, - transfer->length); - - urbs = calloc(num_urbs, sizeof(*urbs)); - if (!urbs) - return LIBUSB_ERROR_NO_MEM; - - tpriv->iso_urbs = urbs; - tpriv->num_urbs = num_urbs; - tpriv->num_retired = 0; - tpriv->reap_action = NORMAL; - tpriv->iso_packet_offset = 0; - - /* allocate + initialize each URB with the correct number of packets */ - num_packets_remaining = num_packets; - for (i = 0, j = 0; i < num_urbs; i++) { - int num_packets_in_urb = MIN(num_packets_remaining, MAX_ISO_PACKETS_PER_URB); - struct usbfs_urb *urb; - size_t alloc_size; - int k; - - alloc_size = sizeof(*urb) - + (num_packets_in_urb * sizeof(struct usbfs_iso_packet_desc)); - urb = calloc(1, alloc_size); - if (!urb) { - free_iso_urbs(tpriv); - return LIBUSB_ERROR_NO_MEM; - } - urbs[i] = urb; - - /* populate packet lengths */ - for (k = 0; k < num_packets_in_urb; j++, k++) { - packet_len = transfer->iso_packet_desc[j].length; - urb->buffer_length += packet_len; - urb->iso_frame_desc[k].length = packet_len; - } - - urb->usercontext = itransfer; - urb->type = USBFS_URB_TYPE_ISO; - /* FIXME: interface for non-ASAP data? */ - urb->flags = USBFS_URB_ISO_ASAP; - urb->endpoint = transfer->endpoint; - urb->number_of_packets = num_packets_in_urb; - urb->buffer = urb_buffer; - - urb_buffer += urb->buffer_length; - num_packets_remaining -= num_packets_in_urb; - } - - /* submit URBs */ - for (i = 0; i < num_urbs; i++) { - int r = ioctl(dpriv->fd, IOCTL_USBFS_SUBMITURB, urbs[i]); - if (r < 0) { - if (errno == ENODEV) { - r = LIBUSB_ERROR_NO_DEVICE; - } else if (errno == EINVAL) { - usbi_warn(TRANSFER_CTX(transfer), - "submiturb failed, transfer too large"); - r = LIBUSB_ERROR_INVALID_PARAM; - } else if (errno == EMSGSIZE) { - usbi_warn(TRANSFER_CTX(transfer), - "submiturb failed, iso packet length too large"); - r = LIBUSB_ERROR_INVALID_PARAM; - } else { - usbi_err(TRANSFER_CTX(transfer), - "submiturb failed error %d errno=%d", r, errno); - r = LIBUSB_ERROR_IO; - } - - /* if the first URB submission fails, we can simply free up and - * return failure immediately. */ - if (i == 0) { - usbi_dbg("first URB failed, easy peasy"); - free_iso_urbs(tpriv); - return r; - } - - /* if it's not the first URB that failed, the situation is a bit - * tricky. we must discard all previous URBs. there are - * complications: - * - discarding is asynchronous - discarded urbs will be reaped - * later. the user must not have freed the transfer when the - * discarded URBs are reaped, otherwise src will be using - * freed memory. - * - the earlier URBs may have completed successfully and we do - * not want to throw away any data. - * so, in this case we discard all the previous URBs BUT we report - * that the transfer was submitted successfully. then later when - * the final discard completes we can report error to the user. - */ - tpriv->reap_action = SUBMIT_FAILED; - - /* The URBs we haven't submitted yet we count as already - * retired. */ - tpriv->num_retired = num_urbs - i; - discard_urbs(itransfer, 0, i); - - usbi_dbg("reporting successful submission but waiting for %d " - "discards before reporting error", i); - return 0; - } - } - - return 0; -} - -static int submit_control_transfer(struct usbi_transfer *itransfer) -{ - struct linux_transfer_priv *tpriv = usbi_transfer_get_os_priv(itransfer); - struct libusb_transfer *transfer = - USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); - struct linux_device_handle_priv *dpriv = - _device_handle_priv(transfer->dev_handle); - struct usbfs_urb *urb; - int r; - - if (transfer->length - LIBUSB_CONTROL_SETUP_SIZE > MAX_CTRL_BUFFER_LENGTH) - return LIBUSB_ERROR_INVALID_PARAM; - - urb = calloc(1, sizeof(struct usbfs_urb)); - if (!urb) - return LIBUSB_ERROR_NO_MEM; - tpriv->urbs = urb; - tpriv->num_urbs = 1; - tpriv->reap_action = NORMAL; - - urb->usercontext = itransfer; - urb->type = USBFS_URB_TYPE_CONTROL; - urb->endpoint = transfer->endpoint; - urb->buffer = transfer->buffer; - urb->buffer_length = transfer->length; - - r = ioctl(dpriv->fd, IOCTL_USBFS_SUBMITURB, urb); - if (r < 0) { - free(urb); - tpriv->urbs = NULL; - if (errno == ENODEV) - return LIBUSB_ERROR_NO_DEVICE; - - usbi_err(TRANSFER_CTX(transfer), - "submiturb failed error %d errno=%d", r, errno); - return LIBUSB_ERROR_IO; - } - return 0; -} - -static int op_submit_transfer(struct usbi_transfer *itransfer) -{ - struct libusb_transfer *transfer = - USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); - - switch (transfer->type) { - case LIBUSB_TRANSFER_TYPE_CONTROL: - return submit_control_transfer(itransfer); - case LIBUSB_TRANSFER_TYPE_BULK: - case LIBUSB_TRANSFER_TYPE_BULK_STREAM: - return submit_bulk_transfer(itransfer); - case LIBUSB_TRANSFER_TYPE_INTERRUPT: - return submit_bulk_transfer(itransfer); - case LIBUSB_TRANSFER_TYPE_ISOCHRONOUS: - return submit_iso_transfer(itransfer); - default: - usbi_err(TRANSFER_CTX(transfer), - "unknown endpoint type %d", transfer->type); - return LIBUSB_ERROR_INVALID_PARAM; - } -} - -static int op_cancel_transfer(struct usbi_transfer *itransfer) -{ - struct linux_transfer_priv *tpriv = usbi_transfer_get_os_priv(itransfer); - struct libusb_transfer *transfer = - USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); - int r; - - if (!tpriv->urbs) - return LIBUSB_ERROR_NOT_FOUND; - - r = discard_urbs(itransfer, 0, tpriv->num_urbs); - if (r != 0) - return r; - - switch (transfer->type) { - case LIBUSB_TRANSFER_TYPE_BULK: - case LIBUSB_TRANSFER_TYPE_BULK_STREAM: - if (tpriv->reap_action == ERROR) - break; - /* else, fall through */ - default: - tpriv->reap_action = CANCELLED; - } - - return 0; -} - -static void op_clear_transfer_priv(struct usbi_transfer *itransfer) -{ - struct libusb_transfer *transfer = - USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); - struct linux_transfer_priv *tpriv = usbi_transfer_get_os_priv(itransfer); - - switch (transfer->type) { - case LIBUSB_TRANSFER_TYPE_CONTROL: - case LIBUSB_TRANSFER_TYPE_BULK: - case LIBUSB_TRANSFER_TYPE_BULK_STREAM: - case LIBUSB_TRANSFER_TYPE_INTERRUPT: - if (tpriv->urbs) { - free(tpriv->urbs); - tpriv->urbs = NULL; - } - break; - case LIBUSB_TRANSFER_TYPE_ISOCHRONOUS: - if (tpriv->iso_urbs) { - free_iso_urbs(tpriv); - tpriv->iso_urbs = NULL; - } - break; - default: - usbi_err(TRANSFER_CTX(transfer), - "unknown endpoint type %d", transfer->type); - } -} - -static int handle_bulk_completion(struct usbi_transfer *itransfer, - struct usbfs_urb *urb) -{ - struct linux_transfer_priv *tpriv = usbi_transfer_get_os_priv(itransfer); - struct libusb_transfer *transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); - int urb_idx = urb - tpriv->urbs; - - usbi_mutex_lock(&itransfer->lock); - usbi_dbg("handling completion status %d of bulk urb %d/%d", urb->status, - urb_idx + 1, tpriv->num_urbs); - - tpriv->num_retired++; - - if (tpriv->reap_action != NORMAL) { - /* cancelled, submit_fail, or completed early */ - usbi_dbg("abnormal reap: urb status %d", urb->status); - - /* even though we're in the process of cancelling, it's possible that - * we may receive some data in these URBs that we don't want to lose. - * examples: - * 1. while the kernel is cancelling all the packets that make up an - * URB, a few of them might complete. so we get back a successful - * cancellation *and* some data. - * 2. we receive a short URB which marks the early completion condition, - * so we start cancelling the remaining URBs. however, we're too - * slow and another URB completes (or at least completes partially). - * (this can't happen since we always use BULK_CONTINUATION.) - * - * When this happens, our objectives are not to lose any "surplus" data, - * and also to stick it at the end of the previously-received data - * (closing any holes), so that src reports the total amount of - * transferred data and presents it in a contiguous chunk. - */ - if (urb->actual_length > 0) { - unsigned char *target = transfer->buffer + itransfer->transferred; - usbi_dbg("received %d bytes of surplus data", urb->actual_length); - if (urb->buffer != target) { - usbi_dbg("moving surplus data from offset %zd to offset %zd", - (unsigned char *) urb->buffer - transfer->buffer, - target - transfer->buffer); - memmove(target, urb->buffer, urb->actual_length); - } - itransfer->transferred += urb->actual_length; - } - - if (tpriv->num_retired == tpriv->num_urbs) { - usbi_dbg("abnormal reap: last URB handled, reporting"); - if (tpriv->reap_action != COMPLETED_EARLY && - tpriv->reap_status == LIBUSB_TRANSFER_COMPLETED) - tpriv->reap_status = LIBUSB_TRANSFER_ERROR; - goto completed; - } - goto out_unlock; - } - - itransfer->transferred += urb->actual_length; - - /* Many of these errors can occur on *any* urb of a multi-urb - * transfer. When they do, we tear down the rest of the transfer. - */ - switch (urb->status) { - case 0: - break; - case -EREMOTEIO: /* short transfer */ - break; - case -ENOENT: /* cancelled */ - case -ECONNRESET: - break; - case -ENODEV: - case -ESHUTDOWN: - usbi_dbg("device removed"); - tpriv->reap_status = LIBUSB_TRANSFER_NO_DEVICE; - goto cancel_remaining; - case -EPIPE: - usbi_dbg("detected endpoint stall"); - if (tpriv->reap_status == LIBUSB_TRANSFER_COMPLETED) - tpriv->reap_status = LIBUSB_TRANSFER_STALL; - goto cancel_remaining; - case -EOVERFLOW: - /* overflow can only ever occur in the last urb */ - usbi_dbg("overflow, actual_length=%d", urb->actual_length); - if (tpriv->reap_status == LIBUSB_TRANSFER_COMPLETED) - tpriv->reap_status = LIBUSB_TRANSFER_OVERFLOW; - goto completed; - case -ETIME: - case -EPROTO: - case -EILSEQ: - case -ECOMM: - case -ENOSR: - usbi_dbg("low level error %d", urb->status); - tpriv->reap_action = ERROR; - goto cancel_remaining; - default: - usbi_warn(ITRANSFER_CTX(itransfer), - "unrecognised urb status %d", urb->status); - tpriv->reap_action = ERROR; - goto cancel_remaining; - } - - /* if we're the last urb or we got less data than requested then we're - * done */ - if (urb_idx == tpriv->num_urbs - 1) { - usbi_dbg("last URB in transfer --> complete!"); - goto completed; - } else if (urb->actual_length < urb->buffer_length) { - usbi_dbg("short transfer %d/%d --> complete!", - urb->actual_length, urb->buffer_length); - if (tpriv->reap_action == NORMAL) - tpriv->reap_action = COMPLETED_EARLY; - } else - goto out_unlock; - -cancel_remaining: - if (ERROR == tpriv->reap_action && LIBUSB_TRANSFER_COMPLETED == tpriv->reap_status) - tpriv->reap_status = LIBUSB_TRANSFER_ERROR; - - if (tpriv->num_retired == tpriv->num_urbs) /* nothing to cancel */ - goto completed; - - /* cancel remaining urbs and wait for their completion before - * reporting results */ - discard_urbs(itransfer, urb_idx + 1, tpriv->num_urbs); - -out_unlock: - usbi_mutex_unlock(&itransfer->lock); - return 0; - -completed: - free(tpriv->urbs); - tpriv->urbs = NULL; - usbi_mutex_unlock(&itransfer->lock); - return CANCELLED == tpriv->reap_action ? - usbi_handle_transfer_cancellation(itransfer) : - usbi_handle_transfer_completion(itransfer, tpriv->reap_status); -} - -static int handle_iso_completion(struct usbi_transfer *itransfer, - struct usbfs_urb *urb) -{ - struct libusb_transfer *transfer = - USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); - struct linux_transfer_priv *tpriv = usbi_transfer_get_os_priv(itransfer); - int num_urbs = tpriv->num_urbs; - int urb_idx = 0; - int i; - enum libusb_transfer_status status = LIBUSB_TRANSFER_COMPLETED; - - usbi_mutex_lock(&itransfer->lock); - for (i = 0; i < num_urbs; i++) { - if (urb == tpriv->iso_urbs[i]) { - urb_idx = i + 1; - break; - } - } - if (urb_idx == 0) { - usbi_err(TRANSFER_CTX(transfer), "could not locate urb!"); - usbi_mutex_unlock(&itransfer->lock); - return LIBUSB_ERROR_NOT_FOUND; - } - - usbi_dbg("handling completion status %d of iso urb %d/%d", urb->status, - urb_idx, num_urbs); - - /* copy isochronous results back in */ - - for (i = 0; i < urb->number_of_packets; i++) { - struct usbfs_iso_packet_desc *urb_desc = &urb->iso_frame_desc[i]; - struct libusb_iso_packet_descriptor *lib_desc = - &transfer->iso_packet_desc[tpriv->iso_packet_offset++]; - lib_desc->status = LIBUSB_TRANSFER_COMPLETED; - switch (urb_desc->status) { - case 0: - break; - case -ENOENT: /* cancelled */ - case -ECONNRESET: - break; - case -ENODEV: - case -ESHUTDOWN: - usbi_dbg("device removed"); - lib_desc->status = LIBUSB_TRANSFER_NO_DEVICE; - break; - case -EPIPE: - usbi_dbg("detected endpoint stall"); - lib_desc->status = LIBUSB_TRANSFER_STALL; - break; - case -EOVERFLOW: - usbi_dbg("overflow error"); - lib_desc->status = LIBUSB_TRANSFER_OVERFLOW; - break; - case -ETIME: - case -EPROTO: - case -EILSEQ: - case -ECOMM: - case -ENOSR: - case -EXDEV: - usbi_dbg("low-level USB error %d", urb_desc->status); - lib_desc->status = LIBUSB_TRANSFER_ERROR; - break; - default: - usbi_warn(TRANSFER_CTX(transfer), - "unrecognised urb status %d", urb_desc->status); - lib_desc->status = LIBUSB_TRANSFER_ERROR; - break; - } - lib_desc->actual_length = urb_desc->actual_length; - } - - tpriv->num_retired++; - - if (tpriv->reap_action != NORMAL) { /* cancelled or submit_fail */ - usbi_dbg("CANCEL: urb status %d", urb->status); - - if (tpriv->num_retired == num_urbs) { - usbi_dbg("CANCEL: last URB handled, reporting"); - free_iso_urbs(tpriv); - if (tpriv->reap_action == CANCELLED) { - usbi_mutex_unlock(&itransfer->lock); - return usbi_handle_transfer_cancellation(itransfer); - } else { - usbi_mutex_unlock(&itransfer->lock); - return usbi_handle_transfer_completion(itransfer, - LIBUSB_TRANSFER_ERROR); - } - } - goto out; - } - - switch (urb->status) { - case 0: - break; - case -ENOENT: /* cancelled */ - case -ECONNRESET: - break; - case -ESHUTDOWN: - usbi_dbg("device removed"); - status = LIBUSB_TRANSFER_NO_DEVICE; - break; - default: - usbi_warn(TRANSFER_CTX(transfer), - "unrecognised urb status %d", urb->status); - status = LIBUSB_TRANSFER_ERROR; - break; - } - - /* if we're the last urb then we're done */ - if (urb_idx == num_urbs) { - usbi_dbg("last URB in transfer --> complete!"); - free_iso_urbs(tpriv); - usbi_mutex_unlock(&itransfer->lock); - return usbi_handle_transfer_completion(itransfer, status); - } - -out: - usbi_mutex_unlock(&itransfer->lock); - return 0; -} - -static int handle_control_completion(struct usbi_transfer *itransfer, - struct usbfs_urb *urb) -{ - struct linux_transfer_priv *tpriv = usbi_transfer_get_os_priv(itransfer); - int status; - - usbi_mutex_lock(&itransfer->lock); - usbi_dbg("handling completion status %d for transfer %p", urb->status, tpriv); - - itransfer->transferred += urb->actual_length; - - if (tpriv->reap_action == CANCELLED) { - if (urb->status != 0 && urb->status != -ENOENT) - usbi_warn(ITRANSFER_CTX(itransfer), - "cancel: unrecognised urb status %d", urb->status); - free(tpriv->urbs); - tpriv->urbs = NULL; - usbi_mutex_unlock(&itransfer->lock); - return usbi_handle_transfer_cancellation(itransfer); - } - - switch (urb->status) { - case 0: - status = LIBUSB_TRANSFER_COMPLETED; - break; - case -ENOENT: /* cancelled */ - status = LIBUSB_TRANSFER_CANCELLED; - break; - case -ENODEV: - case -ESHUTDOWN: - usbi_dbg("device removed"); - status = LIBUSB_TRANSFER_NO_DEVICE; - break; - case -EPIPE: - usbi_dbg("unsupported control request"); - status = LIBUSB_TRANSFER_STALL; - break; - case -EOVERFLOW: - usbi_dbg("control overflow error"); - status = LIBUSB_TRANSFER_OVERFLOW; - break; - case -ETIME: - case -EPROTO: - case -EILSEQ: - case -ECOMM: - case -ENOSR: - usbi_dbg("low-level bus error occurred"); - status = LIBUSB_TRANSFER_ERROR; - break; - default: - usbi_warn(ITRANSFER_CTX(itransfer), - "unrecognised urb status %d", urb->status); - status = LIBUSB_TRANSFER_ERROR; - break; - } - - free(tpriv->urbs); - tpriv->urbs = NULL; - usbi_mutex_unlock(&itransfer->lock); - return usbi_handle_transfer_completion(itransfer, status); -} - -static int reap_for_handle(struct libusb_device_handle *handle) -{ - struct linux_device_handle_priv *hpriv = _device_handle_priv(handle); - int r; - struct usbfs_urb *urb = NULL; - struct usbi_transfer *itransfer; - struct libusb_transfer *transfer; - - r = ioctl(hpriv->fd, IOCTL_USBFS_REAPURBNDELAY, &urb); - if (r == -1 && errno == EAGAIN) - return 1; - if (r < 0) { - if (errno == ENODEV) - return LIBUSB_ERROR_NO_DEVICE; - - usbi_err(HANDLE_CTX(handle), "reap failed error %d errno=%d", - r, errno); - return LIBUSB_ERROR_IO; - } - - itransfer = urb->usercontext; - transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer); - - usbi_dbg("urb type=%d status=%d transferred=%d", urb->type, urb->status, - urb->actual_length); - usbi_dbg("got usb transfer pointer %p", transfer); - - switch (transfer->type) { - case LIBUSB_TRANSFER_TYPE_ISOCHRONOUS: - return handle_iso_completion(itransfer, urb); - case LIBUSB_TRANSFER_TYPE_BULK: - case LIBUSB_TRANSFER_TYPE_BULK_STREAM: - case LIBUSB_TRANSFER_TYPE_INTERRUPT: - return handle_bulk_completion(itransfer, urb); - case LIBUSB_TRANSFER_TYPE_CONTROL: - return handle_control_completion(itransfer, urb); - default: - usbi_err(HANDLE_CTX(handle), "unrecognised endpoint type %x", - transfer->type); - return LIBUSB_ERROR_OTHER; - } -} - -static int op_handle_events(struct libusb_context *ctx, - struct pollfd *fds, POLL_NFDS_TYPE nfds, int num_ready) -{ - int r; - unsigned int i = 0; - - usbi_dbg("called op_handle_events with ctx=%p, fds=%p, nfds=%i, num_ready=%i", ctx, fds, nfds, num_ready); - - usbi_mutex_lock(&ctx->open_devs_lock); - for (i = 0; i < nfds && num_ready > 0; i++) { - struct pollfd *pollfd = &fds[i]; - struct libusb_device_handle *handle; - struct linux_device_handle_priv *hpriv = NULL; - - if (!pollfd->revents) - continue; - - num_ready--; - list_for_each_entry(handle, &ctx->open_devs, list, struct libusb_device_handle) { - hpriv = _device_handle_priv(handle); - if (hpriv->fd == pollfd->fd) - break; - } - - if (!hpriv || hpriv->fd != pollfd->fd) { - usbi_err(ctx, "cannot find handle for fd %d", - pollfd->fd); - continue; - } - - if (pollfd->revents & POLLERR) { - /* remove the fd from the pollfd set so that it doesn't continuously - * trigger an event, and flag that it has been removed so op_close() - * doesn't try to remove it a second time */ - usbi_remove_pollfd(HANDLE_CTX(handle), hpriv->fd); - hpriv->fd_removed = 1; - - /* device will still be marked as attached if hotplug monitor thread - * hasn't processed remove event yet */ - usbi_mutex_static_lock(&linux_hotplug_lock); - if (handle->dev->attached) - linux_device_disconnected(handle->dev->bus_number, - handle->dev->device_address); - usbi_mutex_static_unlock(&linux_hotplug_lock); - - if (hpriv->caps & USBFS_CAP_REAP_AFTER_DISCONNECT) { - do { - r = reap_for_handle(handle); - } while (r == 0); - } - - usbi_handle_disconnect(handle); - continue; - } - - do { - r = reap_for_handle(handle); - } while (r == 0); - if (r == 1 || r == LIBUSB_ERROR_NO_DEVICE) - continue; - else if (r < 0) - goto out; - } - - r = 0; -out: - usbi_mutex_unlock(&ctx->open_devs_lock); - return r; -} - -static int op_clock_gettime(int clk_id, struct timespec *tp) -{ - switch (clk_id) { - case USBI_CLOCK_MONOTONIC: - return clock_gettime(monotonic_clkid, tp); - case USBI_CLOCK_REALTIME: - return clock_gettime(CLOCK_REALTIME, tp); - default: - return LIBUSB_ERROR_INVALID_PARAM; - } -} - -#ifdef USBI_TIMERFD_AVAILABLE -static clockid_t op_get_timerfd_clockid(void) -{ - return monotonic_clkid; - -} -#endif - -const struct usbi_os_backend usbi_backend = { - .name = "Linux usbfs", - .caps = USBI_CAP_HAS_HID_ACCESS|USBI_CAP_SUPPORTS_DETACH_KERNEL_DRIVER, - .init = op_init, - .exit = op_exit, - .get_device_list = NULL, - .hotplug_poll = op_hotplug_poll, - .get_device_descriptor = op_get_device_descriptor, - .get_active_config_descriptor = op_get_active_config_descriptor, - .get_config_descriptor = op_get_config_descriptor, - .get_config_descriptor_by_value = op_get_config_descriptor_by_value, - - .wrap_sys_device = op_wrap_sys_device, - .open = op_open, - .close = op_close, - .get_configuration = op_get_configuration, - .set_configuration = op_set_configuration, - .claim_interface = op_claim_interface, - .release_interface = op_release_interface, - - .set_interface_altsetting = op_set_interface, - .clear_halt = op_clear_halt, - .reset_device = op_reset_device, - - .alloc_streams = op_alloc_streams, - .free_streams = op_free_streams, - - .dev_mem_alloc = op_dev_mem_alloc, - .dev_mem_free = op_dev_mem_free, - - .kernel_driver_active = op_kernel_driver_active, - .detach_kernel_driver = op_detach_kernel_driver, - .attach_kernel_driver = op_attach_kernel_driver, - - .destroy_device = op_destroy_device, - - .submit_transfer = op_submit_transfer, - .cancel_transfer = op_cancel_transfer, - .clear_transfer_priv = op_clear_transfer_priv, - - .handle_events = op_handle_events, - - .clock_gettime = op_clock_gettime, - -#ifdef USBI_TIMERFD_AVAILABLE - .get_timerfd_clockid = op_get_timerfd_clockid, -#endif - - .device_priv_size = sizeof(struct linux_device_priv), - .device_handle_priv_size = sizeof(struct linux_device_handle_priv), - .transfer_priv_size = sizeof(struct linux_transfer_priv), -}; diff --git a/c8_libusb/src/os/linux_usbfs.h b/c8_libusb/src/os/linux_usbfs.h deleted file mode 100644 index a57eb41..0000000 --- a/c8_libusb/src/os/linux_usbfs.h +++ /dev/null @@ -1,194 +0,0 @@ -/* - * usbfs header structures - * Copyright © 2007 Daniel Drake - * Copyright © 2001 Johannes Erdfelt - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#ifndef LIBUSB_USBFS_H -#define LIBUSB_USBFS_H - -#include - -#define SYSFS_DEVICE_PATH "/sys/bus/usb/devices" - -struct usbfs_ctrltransfer { - /* keep in sync with usbdevice_fs.h:usbdevfs_ctrltransfer */ - uint8_t bmRequestType; - uint8_t bRequest; - uint16_t wValue; - uint16_t wIndex; - uint16_t wLength; - - uint32_t timeout; /* in milliseconds */ - - /* pointer to data */ - void *data; -}; - -struct usbfs_bulktransfer { - /* keep in sync with usbdevice_fs.h:usbdevfs_bulktransfer */ - unsigned int ep; - unsigned int len; - unsigned int timeout; /* in milliseconds */ - - /* pointer to data */ - void *data; -}; - -struct usbfs_setinterface { - /* keep in sync with usbdevice_fs.h:usbdevfs_setinterface */ - unsigned int interface; - unsigned int altsetting; -}; - -#define USBFS_MAXDRIVERNAME 255 - -struct usbfs_getdriver { - unsigned int interface; - char driver[USBFS_MAXDRIVERNAME + 1]; -}; - -#define USBFS_URB_SHORT_NOT_OK 0x01 -#define USBFS_URB_ISO_ASAP 0x02 -#define USBFS_URB_BULK_CONTINUATION 0x04 -#define USBFS_URB_QUEUE_BULK 0x10 -#define USBFS_URB_ZERO_PACKET 0x40 - -enum usbfs_urb_type { - USBFS_URB_TYPE_ISO = 0, - USBFS_URB_TYPE_INTERRUPT = 1, - USBFS_URB_TYPE_CONTROL = 2, - USBFS_URB_TYPE_BULK = 3, -}; - -struct usbfs_iso_packet_desc { - unsigned int length; - unsigned int actual_length; - unsigned int status; -}; - -#define MAX_BULK_BUFFER_LENGTH 16384 -#define MAX_CTRL_BUFFER_LENGTH 4096 - -#define MAX_ISO_PACKETS_PER_URB 128 - -struct usbfs_urb { - unsigned char type; - unsigned char endpoint; - int status; - unsigned int flags; - void *buffer; - int buffer_length; - int actual_length; - int start_frame; - union { - int number_of_packets; /* Only used for isoc urbs */ - unsigned int stream_id; /* Only used with bulk streams */ - }; - int error_count; - unsigned int signr; - void *usercontext; - struct usbfs_iso_packet_desc iso_frame_desc[0]; -}; - -struct usbfs_connectinfo { - unsigned int devnum; - unsigned char slow; -}; - -struct usbfs_ioctl { - int ifno; /* interface 0..N ; negative numbers reserved */ - int ioctl_code; /* MUST encode size + direction of data so the - * macros in give correct values */ - void *data; /* param buffer (in, or out) */ -}; - -struct usbfs_hub_portinfo { - unsigned char numports; - unsigned char port[127]; /* port to device num mapping */ -}; - -#define USBFS_CAP_ZERO_PACKET 0x01 -#define USBFS_CAP_BULK_CONTINUATION 0x02 -#define USBFS_CAP_NO_PACKET_SIZE_LIM 0x04 -#define USBFS_CAP_BULK_SCATTER_GATHER 0x08 -#define USBFS_CAP_REAP_AFTER_DISCONNECT 0x10 - -#define USBFS_DISCONNECT_CLAIM_IF_DRIVER 0x01 -#define USBFS_DISCONNECT_CLAIM_EXCEPT_DRIVER 0x02 - -struct usbfs_disconnect_claim { - unsigned int interface; - unsigned int flags; - char driver[USBFS_MAXDRIVERNAME + 1]; -}; - -struct usbfs_streams { - unsigned int num_streams; /* Not used by USBDEVFS_FREE_STREAMS */ - unsigned int num_eps; - unsigned char eps[0]; -}; - -#define IOCTL_USBFS_CONTROL _IOWR('U', 0, struct usbfs_ctrltransfer) -#define IOCTL_USBFS_BULK _IOWR('U', 2, struct usbfs_bulktransfer) -#define IOCTL_USBFS_RESETEP _IOR('U', 3, unsigned int) -#define IOCTL_USBFS_SETINTF _IOR('U', 4, struct usbfs_setinterface) -#define IOCTL_USBFS_SETCONFIG _IOR('U', 5, unsigned int) -#define IOCTL_USBFS_GETDRIVER _IOW('U', 8, struct usbfs_getdriver) -#define IOCTL_USBFS_SUBMITURB _IOR('U', 10, struct usbfs_urb) -#define IOCTL_USBFS_DISCARDURB _IO('U', 11) -#define IOCTL_USBFS_REAPURB _IOW('U', 12, void *) -#define IOCTL_USBFS_REAPURBNDELAY _IOW('U', 13, void *) -#define IOCTL_USBFS_CLAIMINTF _IOR('U', 15, unsigned int) -#define IOCTL_USBFS_RELEASEINTF _IOR('U', 16, unsigned int) -#define IOCTL_USBFS_CONNECTINFO _IOW('U', 17, struct usbfs_connectinfo) -#define IOCTL_USBFS_IOCTL _IOWR('U', 18, struct usbfs_ioctl) -#define IOCTL_USBFS_HUB_PORTINFO _IOR('U', 19, struct usbfs_hub_portinfo) -#define IOCTL_USBFS_RESET _IO('U', 20) -#define IOCTL_USBFS_CLEAR_HALT _IOR('U', 21, unsigned int) -#define IOCTL_USBFS_DISCONNECT _IO('U', 22) -#define IOCTL_USBFS_CONNECT _IO('U', 23) -#define IOCTL_USBFS_CLAIM_PORT _IOR('U', 24, unsigned int) -#define IOCTL_USBFS_RELEASE_PORT _IOR('U', 25, unsigned int) -#define IOCTL_USBFS_GET_CAPABILITIES _IOR('U', 26, __u32) -#define IOCTL_USBFS_DISCONNECT_CLAIM _IOR('U', 27, struct usbfs_disconnect_claim) -#define IOCTL_USBFS_ALLOC_STREAMS _IOR('U', 28, struct usbfs_streams) -#define IOCTL_USBFS_FREE_STREAMS _IOR('U', 29, struct usbfs_streams) - -extern usbi_mutex_static_t linux_hotplug_lock; - -#if defined(HAVE_LIBUDEV) -int linux_udev_start_event_monitor(void); -int linux_udev_stop_event_monitor(void); -int linux_udev_scan_devices(struct libusb_context *ctx); -void linux_udev_hotplug_poll(void); -#else -int linux_netlink_start_event_monitor(void); -int linux_netlink_stop_event_monitor(void); -void linux_netlink_hotplug_poll(void); -#endif - -void linux_hotplug_enumerate(uint8_t busnum, uint8_t devaddr, const char *sys_name); -void linux_device_disconnected(uint8_t busnum, uint8_t devaddr); - -int linux_get_device_address (struct libusb_context *ctx, int detached, - uint8_t *busnum, uint8_t *devaddr, const char *dev_node, - const char *sys_name, int fd); -int linux_enumerate_device(struct libusb_context *ctx, - uint8_t busnum, uint8_t devaddr, const char *sysfs_dir); - -#endif diff --git a/c8_libusb/src/os/poll_posix.c b/c8_libusb/src/os/poll_posix.c deleted file mode 100644 index 8485545..0000000 --- a/c8_libusb/src/os/poll_posix.c +++ /dev/null @@ -1,84 +0,0 @@ -/* - * poll_posix: poll compatibility wrapper for POSIX systems - * Copyright © 2013 RealVNC Ltd. - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - * - */ - -#include "libusb_config.h" - -#include -#include -#include -#include - -#include "../libusbi.h" - -int usbi_pipe(int pipefd[2]) -{ -#if defined(HAVE_PIPE2) - int ret = pipe2(pipefd, O_CLOEXEC); -#else - int ret = pipe(pipefd); -#endif - - if (ret != 0) { - usbi_err(NULL, "failed to create pipe (%d)", errno); - return ret; - } - -#if !defined(HAVE_PIPE2) && defined(FD_CLOEXEC) - ret = fcntl(pipefd[0], F_GETFD); - if (ret == -1) { - usbi_err(NULL, "failed to get pipe fd flags (%d)", errno); - goto err_close_pipe; - } - ret = fcntl(pipefd[0], F_SETFD, ret | FD_CLOEXEC); - if (ret == -1) { - usbi_err(NULL, "failed to set pipe fd flags (%d)", errno); - goto err_close_pipe; - } - - ret = fcntl(pipefd[1], F_GETFD); - if (ret == -1) { - usbi_err(NULL, "failed to get pipe fd flags (%d)", errno); - goto err_close_pipe; - } - ret = fcntl(pipefd[1], F_SETFD, ret | FD_CLOEXEC); - if (ret == -1) { - usbi_err(NULL, "failed to set pipe fd flags (%d)", errno); - goto err_close_pipe; - } -#endif - - ret = fcntl(pipefd[1], F_GETFL); - if (ret == -1) { - usbi_err(NULL, "failed to get pipe fd status flags (%d)", errno); - goto err_close_pipe; - } - ret = fcntl(pipefd[1], F_SETFL, ret | O_NONBLOCK); - if (ret == -1) { - usbi_err(NULL, "failed to set pipe fd status flags (%d)", errno); - goto err_close_pipe; - } - - return 0; - -err_close_pipe: - close(pipefd[0]); - close(pipefd[1]); - return ret; -} diff --git a/c8_libusb/src/os/poll_posix.h b/c8_libusb/src/os/poll_posix.h deleted file mode 100644 index bc0239c..0000000 --- a/c8_libusb/src/os/poll_posix.h +++ /dev/null @@ -1,14 +0,0 @@ -#ifndef LIBUSB_POLL_POSIX_H -#define LIBUSB_POLL_POSIX_H - -#define usbi_write write -#define usbi_read read -#define usbi_close close -#define usbi_poll poll - -int usbi_pipe(int pipefd[2]); - -#define usbi_inc_fds_ref(x, y) -#define usbi_dec_fds_ref(x, y) - -#endif /* LIBUSB_POLL_POSIX_H */ diff --git a/c8_libusb/src/os/threads_posix.c b/c8_libusb/src/os/threads_posix.c deleted file mode 100644 index 2c406a9..0000000 --- a/c8_libusb/src/os/threads_posix.c +++ /dev/null @@ -1,80 +0,0 @@ -/* - * src synchronization using POSIX Threads - * - * Copyright © 2011 Vitali Lovich - * Copyright © 2011 Peter Stuge - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include "libusb_config.h" - -#include -#if defined(__linux__) || defined(__OpenBSD__) -# if defined(__OpenBSD__) -# define _BSD_SOURCE -# endif -# include -# include -#elif defined(__APPLE__) -# include -#elif defined(__CYGWIN__) -# include -#endif - -#include "threads_posix.h" -#include "../libusbi.h" - -int usbi_cond_timedwait(pthread_cond_t *cond, - pthread_mutex_t *mutex, const struct timeval *tv) -{ - struct timespec timeout; - int r; - - r = usbi_backend.clock_gettime(USBI_CLOCK_REALTIME, &timeout); - if (r < 0) - return r; - - timeout.tv_sec += tv->tv_sec; - timeout.tv_nsec += tv->tv_usec * 1000; - while (timeout.tv_nsec >= 1000000000L) { - timeout.tv_nsec -= 1000000000L; - timeout.tv_sec++; - } - - return pthread_cond_timedwait(cond, mutex, &timeout); -} - -int usbi_get_tid(void) -{ - int ret; -#if defined(__ANDROID__) - ret = gettid(); -#elif defined(__linux__) - ret = syscall(SYS_gettid); -#elif defined(__OpenBSD__) - /* The following only works with OpenBSD > 5.1 as it requires - real thread support. For 5.1 and earlier, -1 is returned. */ - ret = syscall(SYS_getthrid); -#elif defined(__APPLE__) - ret = (int)pthread_mach_thread_np(pthread_self()); -#elif defined(__CYGWIN__) - ret = GetCurrentThreadId(); -#else - ret = -1; -#endif -/* TODO: NetBSD thread ID support */ - return ret; -} diff --git a/c8_libusb/src/os/threads_posix.h b/c8_libusb/src/os/threads_posix.h deleted file mode 100644 index af998ba..0000000 --- a/c8_libusb/src/os/threads_posix.h +++ /dev/null @@ -1,102 +0,0 @@ -/* - * src synchronization using POSIX Threads - * - * Copyright © 2010 Peter Stuge - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#ifndef LIBUSB_THREADS_POSIX_H -#define LIBUSB_THREADS_POSIX_H - -#include -#ifdef HAVE_SYS_TIME_H -#include -#endif - -#define USBI_MUTEX_INITIALIZER PTHREAD_MUTEX_INITIALIZER -typedef pthread_mutex_t usbi_mutex_static_t; -static inline void usbi_mutex_static_lock(usbi_mutex_static_t *mutex) -{ - (void)pthread_mutex_lock(mutex); -} -static inline void usbi_mutex_static_unlock(usbi_mutex_static_t *mutex) -{ - (void)pthread_mutex_unlock(mutex); -} - -typedef pthread_mutex_t usbi_mutex_t; -static inline int usbi_mutex_init(usbi_mutex_t *mutex) -{ - return pthread_mutex_init(mutex, NULL); -} -static inline void usbi_mutex_lock(usbi_mutex_t *mutex) -{ - (void)pthread_mutex_lock(mutex); -} -static inline void usbi_mutex_unlock(usbi_mutex_t *mutex) -{ - (void)pthread_mutex_unlock(mutex); -} -static inline int usbi_mutex_trylock(usbi_mutex_t *mutex) -{ - return pthread_mutex_trylock(mutex); -} -static inline void usbi_mutex_destroy(usbi_mutex_t *mutex) -{ - (void)pthread_mutex_destroy(mutex); -} - -typedef pthread_cond_t usbi_cond_t; -static inline void usbi_cond_init(pthread_cond_t *cond) -{ - (void)pthread_cond_init(cond, NULL); -} -static inline int usbi_cond_wait(usbi_cond_t *cond, usbi_mutex_t *mutex) -{ - return pthread_cond_wait(cond, mutex); -} -int usbi_cond_timedwait(usbi_cond_t *cond, - usbi_mutex_t *mutex, const struct timeval *tv); -static inline void usbi_cond_broadcast(usbi_cond_t *cond) -{ - (void)pthread_cond_broadcast(cond); -} -static inline void usbi_cond_destroy(usbi_cond_t *cond) -{ - (void)pthread_cond_destroy(cond); -} - -typedef pthread_key_t usbi_tls_key_t; -static inline void usbi_tls_key_create(usbi_tls_key_t *key) -{ - (void)pthread_key_create(key, NULL); -} -static inline void *usbi_tls_key_get(usbi_tls_key_t key) -{ - return pthread_getspecific(key); -} -static inline void usbi_tls_key_set(usbi_tls_key_t key, void *ptr) -{ - (void)pthread_setspecific(key, ptr); -} -static inline void usbi_tls_key_delete(usbi_tls_key_t key) -{ - (void)pthread_key_delete(key); -} - -int usbi_get_tid(void); - -#endif /* LIBUSB_THREADS_POSIX_H */ diff --git a/c8_libusb/src/strerror.c b/c8_libusb/src/strerror.c deleted file mode 100644 index 7a83c60..0000000 --- a/c8_libusb/src/strerror.c +++ /dev/null @@ -1,233 +0,0 @@ -/* - * src strerror code - * Copyright © 2013 Hans de Goede - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include "libusb_config.h" - -#include -#include -#include -#if defined(HAVE_STRINGS_H) -#include -#endif - -#include "libusbi.h" - -#if defined(_MSC_VER) -#define strncasecmp _strnicmp -#endif - -static size_t usbi_locale = 0; - -/** \ingroup libusb_misc - * How to add a new \ref libusb_strerror() translation: - *
    - *
  1. Download the latest \c strerror.c from:
    - * https://raw.github.com/src/src/master/src/strerror.c
    2. - *
  2. Open the file in an UTF-8 capable editor
    3. - *
  3. Add the 2 letter ISO 639-1 - * code for your locale at the end of \c usbi_locale_supported[]
    - * Eg. for Chinese, you would add "zh" so that: - * \code... usbi_locale_supported[] = { "en", "nl", "fr" };\endcode - * becomes: - * \code... usbi_locale_supported[] = { "en", "nl", "fr", "zh" };\endcode
    4. - *
  4. Copy the { / * English (en) * / ... } section and add it at the end of \c usbi_localized_errors
    - * Eg. for Chinese, the last section of \c usbi_localized_errors could look like: - * \code - * }, { / * Chinese (zh) * / - * "Success", - * ... - * "Other error", - * } - * };\endcode
    5. - *
  5. Translate each of the English messages from the section you copied into your language
    6. - *
  6. Save the file (in UTF-8 format) and send it to \c src-devel\@lists.sourceforge.net
    7. - *
- */ - -static const char* usbi_locale_supported[] = { "en", "nl", "fr", "ru", "de", "hu" }; -static const char* usbi_localized_errors[ARRAYSIZE(usbi_locale_supported)][LIBUSB_ERROR_COUNT] = { - { /* English (en) */ - "Success", - "Input/Output Error", - "Invalid parameter", - "Access denied (insufficient permissions)", - "No such device (it may have been disconnected)", - "Entity not found", - "Resource busy", - "Operation timed out", - "Overflow", - "Pipe error", - "System call interrupted (perhaps due to signal)", - "Insufficient memory", - "Operation not supported or unimplemented on this platform", - "Other error", - }, { /* Dutch (nl) */ - "Gelukt", - "Invoer-/uitvoerfout", - "Ongeldig argument", - "Toegang geweigerd (onvoldoende toegangsrechten)", - "Apparaat bestaat niet (verbinding met apparaat verbroken?)", - "Niet gevonden", - "Apparaat of hulpbron is bezig", - "Bewerking verlopen", - "Waarde is te groot", - "Gebroken pijp", - "Onderbroken systeemaanroep", - "Onvoldoende geheugen beschikbaar", - "Bewerking wordt niet ondersteund", - "Andere fout", - }, { /* French (fr) */ - "Succès", - "Erreur d'entrée/sortie", - "Paramètre invalide", - "Accès refusé (permissions insuffisantes)", - "Périphérique introuvable (peut-être déconnecté)", - "Elément introuvable", - "Resource déjà occupée", - "Operation expirée", - "Débordement", - "Erreur de pipe", - "Appel système abandonné (peut-être à cause d’un signal)", - "Mémoire insuffisante", - "Opération non supportée or non implémentée sur cette plateforme", - "Autre erreur", - }, { /* Russian (ru) */ - "Успех", - "Ошибка ввода/вывода", - "Неверный параметр", - "Доступ запрещён (не хватает прав)", - "Устройство отсутствует (возможно, оно было отсоединено)", - "Элемент не найден", - "Ресурс занят", - "Истекло время ожидания операции", - "Переполнение", - "Ошибка канала", - "Системный вызов прерван (возможно, сигналом)", - "Память исчерпана", - "Операция не поддерживается данной платформой", - "Неизвестная ошибка" - - }, { /* German (de) */ - "Erfolgreich", - "Eingabe-/Ausgabefehler", - "Ungültiger Parameter", - "Keine Berechtigung (Zugriffsrechte fehlen)", - "Kein passendes Gerät gefunden (es könnte entfernt worden sein)", - "Entität nicht gefunden", - "Die Ressource ist belegt", - "Die Wartezeit für die Operation ist abgelaufen", - "Mehr Daten empfangen als erwartet", - "Datenübergabe unterbrochen (broken pipe)", - "Unterbrechung während des Betriebssystemaufrufs", - "Nicht genügend Hauptspeicher verfügbar", - "Die Operation wird nicht unterstützt oder ist auf dieser Platform nicht implementiert", - "Allgemeiner Fehler", - }, { /* Hungarian (hu) */ - "Sikeres", - "Be-/kimeneti hiba", - "Érvénytelen paraméter", - "Hozzáférés megtagadva", - "Az eszköz nem található (eltávolították?)", - "Nem található", - "Az erőforrás foglalt", - "Időtúllépés", - "Túlcsordulás", - "Törött adatcsatorna", - "Rendszerhívás megszakítva", - "Nincs elég memória", - "A művelet nem támogatott ezen a rendszeren", - "Általános hiba", - } -}; - -/** \ingroup libusb_misc - * Set the language, and only the language, not the encoding! used for - * translatable src messages. - * - * This takes a locale string in the default setlocale format: lang[-region] - * or lang[_country_region][.codeset]. Only the lang part of the string is - * used, and only 2 letter ISO 639-1 codes are accepted for it, such as "de". - * The optional region, country_region or codeset parts are ignored. This - * means that functions which return translatable strings will NOT honor the - * specified encoding. - * All strings returned are encoded as UTF-8 strings. - * - * If libusb_setlocale() is not called, all messages will be in English. - * - * The following functions return translatable strings: libusb_strerror(). - * Note that the src log messages controlled through libusb_set_debug() - * are not translated, they are always in English. - * - * For POSIX UTF-8 environments if you want src to follow the standard - * locale settings, call libusb_setlocale(setlocale(LC_MESSAGES, NULL)), - * after your app has done its locale setup. - * - * \param locale locale-string in the form of lang[_country_region][.codeset] - * or lang[-region], where lang is a 2 letter ISO 639-1 code - * \returns LIBUSB_SUCCESS on success - * \returns LIBUSB_ERROR_INVALID_PARAM if the locale doesn't meet the requirements - * \returns LIBUSB_ERROR_NOT_FOUND if the requested language is not supported - * \returns a LIBUSB_ERROR code on other errors - */ - -int API_EXPORTED libusb_setlocale(const char *locale) -{ - size_t i; - - if ( (locale == NULL) || (strlen(locale) < 2) - || ((strlen(locale) > 2) && (locale[2] != '-') && (locale[2] != '_') && (locale[2] != '.')) ) - return LIBUSB_ERROR_INVALID_PARAM; - - for (i=0; i= ARRAYSIZE(usbi_locale_supported)) { - return LIBUSB_ERROR_NOT_FOUND; - } - - usbi_locale = i; - - return LIBUSB_SUCCESS; -} - -/** \ingroup libusb_misc - * Returns a constant string with a short description of the given error code, - * this description is intended for displaying to the end user and will be in - * the language set by libusb_setlocale(). - * - * The returned string is encoded in UTF-8. - * - * The messages always start with a capital letter and end without any dot. - * The caller must not free() the returned string. - * - * \param errcode the error code whose description is desired - * \returns a short description of the error code in UTF-8 encoding - */ -DEFAULT_VISIBILITY const char* LIBUSB_CALL libusb_strerror(enum libusb_error errcode) -{ - int errcode_index = -errcode; - - if ((errcode_index < 0) || (errcode_index >= LIBUSB_ERROR_COUNT)) { - /* "Other Error", which should always be our last message, is returned */ - errcode_index = LIBUSB_ERROR_COUNT - 1; - } - - return usbi_localized_errors[usbi_locale][errcode_index]; -} diff --git a/c8_libusb/src/sync.c b/c8_libusb/src/sync.c deleted file mode 100644 index c2f0f25..0000000 --- a/c8_libusb/src/sync.c +++ /dev/null @@ -1,334 +0,0 @@ -/* -*- Mode: C; indent-tabs-mode:t ; c-basic-offset:8 -*- */ -/* - * Synchronous I/O functions for src - * Copyright © 2007-2008 Daniel Drake - * Copyright © 2019 Nathan Hjelm - * Copyright © 2019 Google LLC. All rights reserved. - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include "libusb_config.h" - -#include -#include -#include -#include - -#include "libusbi.h" - -/** - * @defgroup libusb_syncio Synchronous device I/O - * - * This page documents src's synchronous (blocking) API for USB device I/O. - * This interface is easy to use but has some limitations. More advanced users - * may wish to consider using the \ref libusb_asyncio "asynchronous I/O API" instead. - */ - -static void LIBUSB_CALL sync_transfer_cb(struct libusb_transfer *transfer) -{ - int *completed = transfer->user_data; - *completed = 1; - usbi_dbg("actual_length=%d", transfer->actual_length); - /* caller interprets result and frees transfer */ -} - -static void sync_transfer_wait_for_completion(struct libusb_transfer *transfer) -{ - int r, *completed = transfer->user_data; - struct libusb_context *ctx = HANDLE_CTX(transfer->dev_handle); - - while (!*completed) { - r = libusb_handle_events_completed(ctx, completed); - if (r < 0) { - if (r == LIBUSB_ERROR_INTERRUPTED) - continue; - usbi_err(ctx, "libusb_handle_events failed: %s, cancelling transfer and retrying", - libusb_error_name(r)); - libusb_cancel_transfer(transfer); - continue; - } - if (NULL == transfer->dev_handle) { - /* transfer completion after libusb_close() */ - transfer->status = LIBUSB_TRANSFER_NO_DEVICE; - *completed = 1; - } - } -} - -/** \ingroup libusb_syncio - * Perform a USB control transfer. - * - * The direction of the transfer is inferred from the bmRequestType field of - * the setup packet. - * - * The wValue, wIndex and wLength fields values should be given in host-endian - * byte order. - * - * \param dev_handle a handle for the device to communicate with - * \param bmRequestType the request type field for the setup packet - * \param bRequest the request field for the setup packet - * \param wValue the value field for the setup packet - * \param wIndex the index field for the setup packet - * \param data a suitably-sized data buffer for either input or output - * (depending on direction bits within bmRequestType) - * \param wLength the length field for the setup packet. The data buffer should - * be at least this size. - * \param timeout timeout (in millseconds) that this function should wait - * before giving up due to no response being received. For an unlimited - * timeout, use value 0. - * \returns on success, the number of bytes actually transferred - * \returns LIBUSB_ERROR_TIMEOUT if the transfer timed out - * \returns LIBUSB_ERROR_PIPE if the control request was not supported by the - * device - * \returns LIBUSB_ERROR_NO_DEVICE if the device has been disconnected - * \returns LIBUSB_ERROR_BUSY if called from event handling context - * \returns LIBUSB_ERROR_INVALID_PARAM if the transfer size is larger than - * the operating system and/or hardware can support - * \returns another LIBUSB_ERROR code on other failures - */ -int API_EXPORTED libusb_control_transfer(libusb_device_handle *dev_handle, - uint8_t bmRequestType, uint8_t bRequest, uint16_t wValue, uint16_t wIndex, - unsigned char *data, uint16_t wLength, unsigned int timeout) -{ - struct libusb_transfer *transfer; - unsigned char *buffer; - int completed = 0; - int r; - - if (usbi_handling_events(HANDLE_CTX(dev_handle))) - return LIBUSB_ERROR_BUSY; - - transfer = libusb_alloc_transfer(0); - if (!transfer) - return LIBUSB_ERROR_NO_MEM; - - buffer = (unsigned char*) malloc(LIBUSB_CONTROL_SETUP_SIZE + wLength); - if (!buffer) { - libusb_free_transfer(transfer); - return LIBUSB_ERROR_NO_MEM; - } - - libusb_fill_control_setup(buffer, bmRequestType, bRequest, wValue, wIndex, wLength); - if ((bmRequestType & LIBUSB_ENDPOINT_DIR_MASK) == LIBUSB_ENDPOINT_OUT) - memcpy(buffer + LIBUSB_CONTROL_SETUP_SIZE, data, wLength); - - libusb_fill_control_transfer(transfer, dev_handle, buffer, - sync_transfer_cb, &completed, timeout); - transfer->flags = LIBUSB_TRANSFER_FREE_BUFFER; - r = libusb_submit_transfer(transfer); - if (r < 0) { - libusb_free_transfer(transfer); - return r; - } - - sync_transfer_wait_for_completion(transfer); - - if ((bmRequestType & LIBUSB_ENDPOINT_DIR_MASK) == LIBUSB_ENDPOINT_IN) - memcpy(data, libusb_control_transfer_get_data(transfer), - transfer->actual_length); - - switch (transfer->status) { - case LIBUSB_TRANSFER_COMPLETED: - r = transfer->actual_length; - break; - case LIBUSB_TRANSFER_TIMED_OUT: - r = LIBUSB_ERROR_TIMEOUT; - break; - case LIBUSB_TRANSFER_STALL: - r = LIBUSB_ERROR_PIPE; - break; - case LIBUSB_TRANSFER_NO_DEVICE: - r = LIBUSB_ERROR_NO_DEVICE; - break; - case LIBUSB_TRANSFER_OVERFLOW: - r = LIBUSB_ERROR_OVERFLOW; - break; - case LIBUSB_TRANSFER_ERROR: - case LIBUSB_TRANSFER_CANCELLED: - r = LIBUSB_ERROR_IO; - break; - default: - usbi_warn(HANDLE_CTX(dev_handle), - "unrecognised status code %d", transfer->status); - r = LIBUSB_ERROR_OTHER; - } - - libusb_free_transfer(transfer); - return r; -} - -static int do_sync_bulk_transfer(struct libusb_device_handle *dev_handle, - unsigned char endpoint, unsigned char *buffer, int length, - int *transferred, unsigned int timeout, unsigned char type) -{ - struct libusb_transfer *transfer; - int completed = 0; - int r; - - if (usbi_handling_events(HANDLE_CTX(dev_handle))) - return LIBUSB_ERROR_BUSY; - - transfer = libusb_alloc_transfer(0); - if (!transfer) - return LIBUSB_ERROR_NO_MEM; - - libusb_fill_bulk_transfer(transfer, dev_handle, endpoint, buffer, length, - sync_transfer_cb, &completed, timeout); - transfer->type = type; - - r = libusb_submit_transfer(transfer); - if (r < 0) { - libusb_free_transfer(transfer); - return r; - } - - sync_transfer_wait_for_completion(transfer); - - if (transferred) - *transferred = transfer->actual_length; - - switch (transfer->status) { - case LIBUSB_TRANSFER_COMPLETED: - r = 0; - break; - case LIBUSB_TRANSFER_TIMED_OUT: - r = LIBUSB_ERROR_TIMEOUT; - break; - case LIBUSB_TRANSFER_STALL: - r = LIBUSB_ERROR_PIPE; - break; - case LIBUSB_TRANSFER_OVERFLOW: - r = LIBUSB_ERROR_OVERFLOW; - break; - case LIBUSB_TRANSFER_NO_DEVICE: - r = LIBUSB_ERROR_NO_DEVICE; - break; - case LIBUSB_TRANSFER_ERROR: - case LIBUSB_TRANSFER_CANCELLED: - r = LIBUSB_ERROR_IO; - break; - default: - usbi_warn(HANDLE_CTX(dev_handle), - "unrecognised status code %d", transfer->status); - r = LIBUSB_ERROR_OTHER; - } - - libusb_free_transfer(transfer); - return r; -} - -/** \ingroup libusb_syncio - * Perform a USB bulk transfer. The direction of the transfer is inferred from - * the direction bits of the endpoint address. - * - * For bulk reads, the length field indicates the maximum length of - * data you are expecting to receive. If less data arrives than expected, - * this function will return that data, so be sure to check the - * transferred output parameter. - * - * You should also check the transferred parameter for bulk writes. - * Not all of the data may have been written. - * - * Also check transferred when dealing with a timeout error code. - * src may have to split your transfer into a number of chunks to satisfy - * underlying O/S requirements, meaning that the timeout may expire after - * the first few chunks have completed. src is careful not to lose any data - * that may have been transferred; do not assume that timeout conditions - * indicate a complete lack of I/O. - * - * \param dev_handle a handle for the device to communicate with - * \param endpoint the address of a valid endpoint to communicate with - * \param data a suitably-sized data buffer for either input or output - * (depending on endpoint) - * \param length for bulk writes, the number of bytes from data to be sent. for - * bulk reads, the maximum number of bytes to receive into the data buffer. - * \param transferred output location for the number of bytes actually - * transferred. Since version 1.0.21 (\ref LIBUSB_API_VERSION >= 0x01000105), - * it is legal to pass a NULL pointer if you do not wish to receive this - * information. - * \param timeout timeout (in millseconds) that this function should wait - * before giving up due to no response being received. For an unlimited - * timeout, use value 0. - * - * \returns 0 on success (and populates transferred) - * \returns LIBUSB_ERROR_TIMEOUT if the transfer timed out (and populates - * transferred) - * \returns LIBUSB_ERROR_PIPE if the endpoint halted - * \returns LIBUSB_ERROR_OVERFLOW if the device offered more data, see - * \ref libusb_packetoverflow - * \returns LIBUSB_ERROR_NO_DEVICE if the device has been disconnected - * \returns LIBUSB_ERROR_BUSY if called from event handling context - * \returns another LIBUSB_ERROR code on other failures - */ -int API_EXPORTED libusb_bulk_transfer(struct libusb_device_handle *dev_handle, - unsigned char endpoint, unsigned char *data, int length, int *transferred, - unsigned int timeout) -{ - return do_sync_bulk_transfer(dev_handle, endpoint, data, length, - transferred, timeout, LIBUSB_TRANSFER_TYPE_BULK); -} - -/** \ingroup libusb_syncio - * Perform a USB interrupt transfer. The direction of the transfer is inferred - * from the direction bits of the endpoint address. - * - * For interrupt reads, the length field indicates the maximum length - * of data you are expecting to receive. If less data arrives than expected, - * this function will return that data, so be sure to check the - * transferred output parameter. - * - * You should also check the transferred parameter for interrupt - * writes. Not all of the data may have been written. - * - * Also check transferred when dealing with a timeout error code. - * src may have to split your transfer into a number of chunks to satisfy - * underlying O/S requirements, meaning that the timeout may expire after - * the first few chunks have completed. src is careful not to lose any data - * that may have been transferred; do not assume that timeout conditions - * indicate a complete lack of I/O. - * - * The default endpoint bInterval value is used as the polling interval. - * - * \param dev_handle a handle for the device to communicate with - * \param endpoint the address of a valid endpoint to communicate with - * \param data a suitably-sized data buffer for either input or output - * (depending on endpoint) - * \param length for bulk writes, the number of bytes from data to be sent. for - * bulk reads, the maximum number of bytes to receive into the data buffer. - * \param transferred output location for the number of bytes actually - * transferred. Since version 1.0.21 (\ref LIBUSB_API_VERSION >= 0x01000105), - * it is legal to pass a NULL pointer if you do not wish to receive this - * information. - * \param timeout timeout (in millseconds) that this function should wait - * before giving up due to no response being received. For an unlimited - * timeout, use value 0. - * - * \returns 0 on success (and populates transferred) - * \returns LIBUSB_ERROR_TIMEOUT if the transfer timed out - * \returns LIBUSB_ERROR_PIPE if the endpoint halted - * \returns LIBUSB_ERROR_OVERFLOW if the device offered more data, see - * \ref libusb_packetoverflow - * \returns LIBUSB_ERROR_NO_DEVICE if the device has been disconnected - * \returns LIBUSB_ERROR_BUSY if called from event handling context - * \returns another LIBUSB_ERROR code on other error - */ -int API_EXPORTED libusb_interrupt_transfer( - struct libusb_device_handle *dev_handle, unsigned char endpoint, - unsigned char *data, int length, int *transferred, unsigned int timeout) -{ - return do_sync_bulk_transfer(dev_handle, endpoint, data, length, - transferred, timeout, LIBUSB_TRANSFER_TYPE_INTERRUPT); -} diff --git a/c8_libusb/src/version.h b/c8_libusb/src/version.h deleted file mode 100644 index 8fccd35..0000000 --- a/c8_libusb/src/version.h +++ /dev/null @@ -1,18 +0,0 @@ -/* This file is parsed by m4 and windres and RC.EXE so please keep it simple. */ -#include "version_nano.h" -#ifndef LIBUSB_MAJOR -#define LIBUSB_MAJOR 1 -#endif -#ifndef LIBUSB_MINOR -#define LIBUSB_MINOR 0 -#endif -#ifndef LIBUSB_MICRO -#define LIBUSB_MICRO 23 -#endif -#ifndef LIBUSB_NANO -#define LIBUSB_NANO 0 -#endif -/* LIBUSB_RC is the release candidate suffix. Should normally be empty. */ -#ifndef LIBUSB_RC -#define LIBUSB_RC "" -#endif diff --git a/c8_libusb/src/version_nano.h b/c8_libusb/src/version_nano.h deleted file mode 100644 index 6a53476..0000000 --- a/c8_libusb/src/version_nano.h +++ /dev/null @@ -1 +0,0 @@ -#define LIBUSB_NANO 11402 diff --git a/c8_remote/CMakeLists.txt b/c8_remote/CMakeLists.txt index 206cfc0..2cb6934 100644 --- a/c8_remote/CMakeLists.txt +++ b/c8_remote/CMakeLists.txt @@ -11,4 +11,4 @@ add_custom_command(TARGET checkm8_remote POST_BUILD ${CMAKE_SOURCE_DIR}/c8_payloads/bin ${CMAKE_CURRENT_SOURCE_DIR}/bin/payloads) -target_link_libraries(checkm8_remote checkm8_libusb pthread udev) \ No newline at end of file +target_link_libraries(checkm8_remote usb-1.0 pthread udev) \ No newline at end of file diff --git a/c8_remote/include/usb_helpers.h b/c8_remote/include/usb_helpers.h index 81c4f62..4e2d568 100644 --- a/c8_remote/include/usb_helpers.h +++ b/c8_remote/include/usb_helpers.h @@ -6,8 +6,6 @@ #define MAX_PACKET_SIZE 0x800 #ifndef WITH_ARDUINO -#include "libusb.h" - struct libusb_device_bundle { struct libusb_context *ctx; diff --git a/c8_remote/src/usb_helpers.c b/c8_remote/src/usb_helpers.c index 9f07775..192fd48 100644 --- a/c8_remote/src/usb_helpers.c +++ b/c8_remote/src/usb_helpers.c @@ -11,7 +11,7 @@ #include #include -#include "libusbi.h" +#include #endif @@ -124,7 +124,6 @@ int open_device_session(struct pwned_device *dev) if(dev->bundle->ctx == NULL) { checkm8_debug_indent("\tbundle ctx is NULL, allocating\n"); - dev->bundle->ctx = malloc(sizeof(libusb_context)); libusb_init(&dev->bundle->ctx); } else