262047055d
The docs have been updated. max_len is libfuzzer specific, new way is fuzzer agnostic. Docs: https://chromium.googlesource.com/chromium/src/+/master/testing/libfuzzer/getting_started.md#improving-your-fuzz-target Bug: chromium:895082 Test: flexfec_sender_fuzzer input size still converges at <=200 after running locally for 5-10 minutes. Change-Id: I7a5ce95cb4d8b8ca461f6e502b81b599daa855f9 Reviewed-on: https://webrtc-review.googlesource.com/c/107883 Commit-Queue: Sam Zackrisson <saza@webrtc.org> Reviewed-by: Alex Loiko <aleloi@webrtc.org> Cr-Commit-Position: refs/heads/master@{#25361}
71 lines
2.4 KiB
C++
71 lines
2.4 KiB
C++
/*
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* Copyright (c) 2016 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 <memory>
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#include "modules/rtp_rtcp/include/flexfec_sender.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_to_send.h"
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#include "system_wrappers/include/clock.h"
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namespace webrtc {
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namespace {
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constexpr int kFlexfecPayloadType = 123;
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constexpr uint32_t kMediaSsrc = 1234;
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constexpr uint32_t kFlexfecSsrc = 5678;
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const char kNoMid[] = "";
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const std::vector<RtpExtension> kNoRtpHeaderExtensions;
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const std::vector<RtpExtensionSize> kNoRtpHeaderExtensionSizes;
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} // namespace
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void FuzzOneInput(const uint8_t* data, size_t size) {
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size_t i = 0;
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if (size < 5 || size > 200) {
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return;
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}
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SimulatedClock clock(1 + data[i++]);
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FlexfecSender sender(kFlexfecPayloadType, kFlexfecSsrc, kMediaSsrc, kNoMid,
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kNoRtpHeaderExtensions, kNoRtpHeaderExtensionSizes,
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nullptr /* rtp_state */, &clock);
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FecProtectionParams params = {
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data[i++], static_cast<int>(data[i++] % 100),
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data[i++] <= 127 ? kFecMaskRandom : kFecMaskBursty};
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sender.SetFecParameters(params);
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uint16_t seq_num = data[i++];
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while (i + 1 < size) {
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// Everything past the base RTP header (12 bytes) is payload,
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// from the perspective of FlexFEC.
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size_t payload_size = data[i++];
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if (i + kRtpHeaderSize + payload_size >= size)
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break;
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std::unique_ptr<uint8_t[]> packet(
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new uint8_t[kRtpHeaderSize + payload_size]);
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memcpy(packet.get(), &data[i], kRtpHeaderSize + payload_size);
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i += kRtpHeaderSize + payload_size;
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ByteWriter<uint16_t>::WriteBigEndian(&packet[2], seq_num++);
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ByteWriter<uint32_t>::WriteBigEndian(&packet[8], kMediaSsrc);
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RtpPacketToSend rtp_packet(nullptr);
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if (!rtp_packet.Parse(packet.get(), kRtpHeaderSize + payload_size))
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break;
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sender.AddRtpPacketAndGenerateFec(rtp_packet);
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if (sender.FecAvailable()) {
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std::vector<std::unique_ptr<RtpPacketToSend>> fec_packets =
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sender.GetFecPackets();
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}
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}
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}
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} // namespace webrtc
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