0c720505af
Bug: none Change-Id: I20e622455aee2f5aebad835e915d65f3475fbd17 Reviewed-on: https://webrtc-review.googlesource.com/14300 Commit-Queue: Mark Brand <markbrand@google.com> Reviewed-by: Henrik Lundin <henrik.lundin@webrtc.org> Cr-Commit-Position: refs/heads/master@{#20384}
80 lines
2.9 KiB
C++
80 lines
2.9 KiB
C++
/*
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* Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include <algorithm>
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#include "modules/rtp_rtcp/include/ulpfec_receiver.h"
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#include "modules/rtp_rtcp/include/rtp_rtcp_defines.h"
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#include "modules/rtp_rtcp/source/byte_io.h"
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#include "modules/rtp_rtcp/source/rtp_packet_received.h"
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#include "rtc_base/basictypes.h"
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namespace webrtc {
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namespace {
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class DummyCallback : public RecoveredPacketReceiver {
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void OnRecoveredPacket(const uint8_t* packet, size_t length) override {}
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};
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} // namespace
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void FuzzOneInput(const uint8_t* data, size_t size) {
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constexpr size_t kMinDataNeeded = 12;
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if (size < kMinDataNeeded) {
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return;
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}
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uint32_t ulpfec_ssrc = ByteReader<uint32_t>::ReadLittleEndian(data + 0);
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uint16_t ulpfec_seq_num = ByteReader<uint16_t>::ReadLittleEndian(data + 4);
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uint32_t media_ssrc = ByteReader<uint32_t>::ReadLittleEndian(data + 6);
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uint16_t media_seq_num = ByteReader<uint16_t>::ReadLittleEndian(data + 10);
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DummyCallback callback;
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std::unique_ptr<UlpfecReceiver> receiver(
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UlpfecReceiver::Create(ulpfec_ssrc, &callback));
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std::unique_ptr<uint8_t[]> packet;
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size_t packet_length;
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size_t i = kMinDataNeeded;
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while (i < size) {
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packet_length = kRtpHeaderSize + data[i++];
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packet = std::unique_ptr<uint8_t[]>(new uint8_t[packet_length]);
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if (i + packet_length >= size) {
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break;
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}
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memcpy(packet.get(), data + i, packet_length);
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i += packet_length;
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// Overwrite the RTPHeader fields for the sequence number and SSRC with
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// consistent values for either a received UlpFEC packet or received media
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// packet. (We're still relying on libfuzzer to manage to generate packet
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// headers that interact together; this just ensures that we have two
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// consistent streams).
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if (i < size && data[i++] % 2 == 0) {
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// Simulate UlpFEC packet.
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ByteWriter<uint16_t>::WriteBigEndian(packet.get() + 2, ulpfec_seq_num++);
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ByteWriter<uint32_t>::WriteBigEndian(packet.get() + 8, ulpfec_ssrc);
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} else {
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// Simulate media packet.
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ByteWriter<uint16_t>::WriteBigEndian(packet.get() + 2, media_seq_num++);
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ByteWriter<uint32_t>::WriteBigEndian(packet.get() + 8, media_ssrc);
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}
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RtpPacketReceived parsed_packet;
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RTPHeader parsed_header;
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if (parsed_packet.Parse(packet.get(), packet_length)) {
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parsed_packet.GetHeader(&parsed_header);
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receiver->AddReceivedRedPacket(parsed_header, packet.get(),
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packet_length, 0);
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}
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}
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receiver->ProcessReceivedFec();
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}
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} // namespace webrtc
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