/* * Copyright (c) 2011 Vojtech Horky * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * - Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * - Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * - The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /** @addtogroup libusbvirt * @{ */ /** @file * Control transfer handling. */ #include "private.h" #include <usb/dev/request.h> #include <usb/debug.h> #include <assert.h> #include <errno.h> /** Find and execute control transfer handler for virtual USB device. * * @param dev Target virtual device. * @param control_handlers Array of control request handlers. * @param setup Setup packet. * @param data Extra data. * @param data_sent_size Size of extra data in bytes. * @return Error code. * @retval EFORWARD No suitable handler found. */ errno_t process_control_transfer(usbvirt_device_t *dev, const usbvirt_control_request_handler_t *control_handlers, const usb_device_request_setup_packet_t *setup, uint8_t *data, size_t *data_sent_size) { assert(dev); assert(setup); if (control_handlers == NULL) { return EFORWARD; } const usbvirt_control_request_handler_t *handler = control_handlers; for (; handler->callback != NULL; ++handler) { if (handler->request != setup->request || handler->request_type != setup->request_type) { continue; } usb_log_debug("Control transfer: %s(%s)", handler->name, usb_debug_str_buffer((uint8_t *) setup, sizeof(*setup), 0)); errno_t rc = handler->callback(dev, setup, data, data_sent_size); if (rc != EFORWARD) { return rc; } } return EFORWARD; } /** * @} */