[dc06caa] | 1 | /*
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| 2 | * Copyright (c) 2011 Vojtech Horky
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | /** @addtogroup libusbvirt
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| 30 | * @{
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| 31 | */
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| 32 | /** @file
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| 33 | * Control transfer handling.
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| 34 | */
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[6cb58e6] | 35 | #include "private.h"
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[7d521e24] | 36 | #include <usb/dev/request.h>
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[6cb58e6] | 37 | #include <usb/debug.h>
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| 38 | #include <assert.h>
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| 39 | #include <errno.h>
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| 40 |
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[dc06caa] | 41 | /** Find and execute control transfer handler for virtual USB device.
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| 42 | *
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| 43 | * @param dev Target virtual device.
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| 44 | * @param control_handlers Array of control request handlers.
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| 45 | * @param setup Setup packet.
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| 46 | * @param data Extra data.
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| 47 | * @param data_sent_size Size of extra data in bytes.
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| 48 | * @return Error code.
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| 49 | * @retval EFORWARD No suitable handler found.
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| 50 | */
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[5a6cc679] | 51 | errno_t process_control_transfer(usbvirt_device_t *dev,
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[81da273b] | 52 | const usbvirt_control_request_handler_t *control_handlers,
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[d1974966] | 53 | const usb_device_request_setup_packet_t *setup,
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[6cb58e6] | 54 | uint8_t *data, size_t *data_sent_size)
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| 55 | {
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| 56 | assert(dev);
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| 57 | assert(setup);
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| 58 |
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| 59 | if (control_handlers == NULL) {
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| 60 | return EFORWARD;
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| 61 | }
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[a35b458] | 62 |
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[81da273b] | 63 | const usbvirt_control_request_handler_t *handler = control_handlers;
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[c9399c0] | 64 | for (;handler->callback != NULL; ++handler) {
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| 65 | if (handler->request != setup->request ||
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| 66 | handler->request_type != setup->request_type) {
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| 67 | continue;
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[6cb58e6] | 68 | }
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| 69 |
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[a1732929] | 70 | usb_log_debug("Control transfer: %s(%s)", handler->name,
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[6cb58e6] | 71 | usb_debug_str_buffer((uint8_t*) setup, sizeof(*setup), 0));
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[5a6cc679] | 72 | errno_t rc = handler->callback(dev, setup, data, data_sent_size);
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[c9399c0] | 73 | if (rc != EFORWARD) {
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| 74 | return rc;
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[6cb58e6] | 75 | }
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| 76 |
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| 77 | }
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| 78 |
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| 79 | return EFORWARD;
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| 80 | }
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[dc06caa] | 81 |
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| 82 |
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| 83 | /**
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| 84 | * @}
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| 85 | */
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