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/*
* Copyright (c) 2017 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/rtp_rtcp_defines.h"
#include "modules/rtp_rtcp/source/byte_io.h"
#include "modules/rtp_rtcp/source/rtp_packet_received.h"
#include "modules/rtp_rtcp/source/ulpfec_receiver.h"
#include "test/fuzzers/fuzz_data_helper.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 ulpfec_ssrc = ByteReader<uint32_t>::ReadLittleEndian(data + 0);
uint16_t ulpfec_seq_num = ByteReader<uint16_t>::ReadLittleEndian(data + 4);
uint32_t media_ssrc = ByteReader<uint32_t>::ReadLittleEndian(data + 6);
uint16_t media_seq_num = ByteReader<uint16_t>::ReadLittleEndian(data + 10);
DummyCallback callback;
UlpfecReceiver receiver(ulpfec_ssrc, 0, &callback, Clock::GetRealTimeClock());
test::FuzzDataHelper fuzz_data(rtc::MakeArrayView(data, size));
while (fuzz_data.CanReadBytes(kMinDataNeeded)) {
size_t packet_length = kRtpHeaderSize + fuzz_data.Read<uint8_t>();
auto raw_packet = fuzz_data.ReadByteArray(packet_length);
RtpPacketReceived parsed_packet;
if (!parsed_packet.Parse(raw_packet))
continue;
// Overwrite the fields for the sequence number and SSRC with
// consistent values for either a received UlpFEC packet or received media
// packet. (We're still relying on libfuzzer to manage to generate packet
// headers that interact together; this just ensures that we have two
// consistent streams).
if (fuzz_data.ReadOrDefaultValue<uint8_t>(0) % 2 == 0) {
// Simulate UlpFEC packet.
parsed_packet.SetSequenceNumber(ulpfec_seq_num++);
parsed_packet.SetSsrc(ulpfec_ssrc);
} else {
// Simulate media packet.
parsed_packet.SetSequenceNumber(media_seq_num++);
parsed_packet.SetSsrc(media_ssrc);
}
receiver.AddReceivedRedPacket(parsed_packet);
}
receiver.ProcessReceivedFec();
}
} // namespace webrtc
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