1/*
2 *  Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
3 *
4 *  Use of this source code is governed by a BSD-style license
5 *  that can be found in the LICENSE file in the root of the source
6 *  tree. An additional intellectual property rights grant can be found
7 *  in the file PATENTS.  All contributing project authors may
8 *  be found in the AUTHORS file in the root of the source tree.
9 */
10#include "webrtc/base/checks.h"
11#include "webrtc/base/scoped_ptr.h"
12#include "webrtc/modules/rtp_rtcp/source/byte_io.h"
13#include "webrtc/modules/rtp_rtcp/source/producer_fec.h"
14
15namespace webrtc {
16
17void FuzzOneInput(const uint8_t* data, size_t size) {
18  ForwardErrorCorrection fec;
19  ProducerFec producer(&fec);
20  size_t i = 0;
21  if (size < 4)
22    return;
23  FecProtectionParams params = {data[i++] % 128, data[i++] % 1,
24                                static_cast<int>(data[i++] % 10),
25                                kFecMaskBursty};
26  producer.SetFecParameters(&params, 0);
27  uint16_t seq_num = data[i++];
28
29  while (i + 3 < size) {
30    size_t rtp_header_length = data[i++] % 10 + 12;
31    size_t payload_size = data[i++] % 10;
32    if (i + payload_size + rtp_header_length + 2 > size)
33      break;
34    rtc::scoped_ptr<uint8_t[]> packet(
35        new uint8_t[payload_size + rtp_header_length]);
36    memcpy(packet.get(), &data[i], payload_size + rtp_header_length);
37    ByteWriter<uint16_t>::WriteBigEndian(&packet[2], seq_num++);
38    i += payload_size + rtp_header_length;
39    // Make sure sequence numbers are increasing.
40    const int kRedPayloadType = 98;
41    rtc::scoped_ptr<RedPacket> red_packet(producer.BuildRedPacket(
42        packet.get(), payload_size, rtp_header_length, kRedPayloadType));
43    bool protect = static_cast<bool>(data[i++] % 2);
44    if (protect) {
45      producer.AddRtpPacketAndGenerateFec(packet.get(), payload_size,
46                                          rtp_header_length);
47    }
48    uint16_t num_fec_packets = producer.NumAvailableFecPackets();
49    std::vector<RedPacket*> fec_packets;
50    if (num_fec_packets > 0) {
51      fec_packets =
52          producer.GetFecPackets(kRedPayloadType, 99, 100, rtp_header_length);
53      RTC_CHECK_EQ(num_fec_packets, fec_packets.size());
54    }
55    for (RedPacket* fec_packet : fec_packets) {
56      delete fec_packet;
57    }
58  }
59}
60}  // namespace webrtc
61