1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
|
/*
* Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include <algorithm>
#include "modules/rtp_rtcp/include/flexfec_receiver.h"
#include "modules/rtp_rtcp/include/rtp_rtcp_defines.h"
#include "modules/rtp_rtcp/source/byte_io.h"
#include "modules/rtp_rtcp/source/rtp_packet_received.h"
namespace webrtc {
namespace {
class DummyCallback : public RecoveredPacketReceiver {
void OnRecoveredPacket(const RtpPacketReceived& packet) override {}
};
} // namespace
void FuzzOneInput(const uint8_t* data, size_t size) {
constexpr size_t kMinDataNeeded = 12;
if (size < kMinDataNeeded || size > 2000) {
return;
}
uint32_t flexfec_ssrc;
memcpy(&flexfec_ssrc, data + 0, 4);
uint16_t flexfec_seq_num;
memcpy(&flexfec_seq_num, data + 4, 2);
uint32_t media_ssrc;
memcpy(&media_ssrc, data + 6, 4);
uint16_t media_seq_num;
memcpy(&media_seq_num, data + 10, 2);
DummyCallback callback;
FlexfecReceiver receiver(flexfec_ssrc, media_ssrc, &callback);
std::unique_ptr<uint8_t[]> packet;
size_t packet_length;
size_t i = kMinDataNeeded;
while (i < size) {
packet_length = kRtpHeaderSize + data[i++];
packet = std::unique_ptr<uint8_t[]>(new uint8_t[packet_length]);
if (i + packet_length >= size) {
break;
}
memcpy(packet.get(), data + i, packet_length);
i += packet_length;
if (i < size && data[i++] % 2 == 0) {
// Simulate FlexFEC packet.
ByteWriter<uint16_t>::WriteBigEndian(packet.get() + 2, flexfec_seq_num++);
ByteWriter<uint32_t>::WriteBigEndian(packet.get() + 8, flexfec_ssrc);
} else {
// Simulate media packet.
ByteWriter<uint16_t>::WriteBigEndian(packet.get() + 2, media_seq_num++);
ByteWriter<uint32_t>::WriteBigEndian(packet.get() + 8, media_ssrc);
}
RtpPacketReceived parsed_packet;
if (parsed_packet.Parse(packet.get(), packet_length)) {
receiver.OnRtpPacket(parsed_packet);
}
}
}
} // namespace webrtc
|
