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/*
* Copyright (c) 2021 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 <cstddef>
#include <cstdint>
#include <limits>
#include "api/array_view.h"
#include "api/video/video_layers_allocation.h"
#include "modules/rtp_rtcp/source/rtp_video_layers_allocation_extension.h"
#include "rtc_base/checks.h"
namespace webrtc {
void FuzzOneInput(const uint8_t* data, size_t size) {
// Video layers allocation is an rtp header extension.
// Per https://datatracker.ietf.org/doc/html/rfc8285#section-4.3
// rtp header extension uses up to one byte to store the size, i.e.
// maximum size of any rtp header extension is 255 bytes.
constexpr int kMaxSize = std::numeric_limits<uint8_t>::max();
if (size > kMaxSize) {
return;
}
auto raw = webrtc::MakeArrayView(data, size);
VideoLayersAllocation allocation1;
if (!RtpVideoLayersAllocationExtension::Parse(raw, &allocation1)) {
// Ignore invalid buffer and move on.
return;
}
// Write parsed allocation back into raw buffer.
size_t value_size = RtpVideoLayersAllocationExtension::ValueSize(allocation1);
// Check `writer` use minimal number of bytes to pack the extension by
// checking it doesn't use more than reader consumed.
RTC_CHECK_LE(value_size, raw.size());
uint8_t some_memory[kMaxSize];
RTC_CHECK_LE(value_size, kMaxSize);
webrtc::ArrayView<uint8_t> write_buffer(some_memory, value_size);
RTC_CHECK(
RtpVideoLayersAllocationExtension::Write(write_buffer, allocation1));
// Parse what Write assembled.
// Unlike random input that should always succeed.
VideoLayersAllocation allocation2;
RTC_CHECK(
RtpVideoLayersAllocationExtension::Parse(write_buffer, &allocation2));
RTC_CHECK_EQ(allocation1.rtp_stream_index, allocation2.rtp_stream_index);
RTC_CHECK_EQ(allocation1.resolution_and_frame_rate_is_valid,
allocation2.resolution_and_frame_rate_is_valid);
RTC_CHECK_EQ(allocation1.active_spatial_layers.size(),
allocation2.active_spatial_layers.size());
RTC_CHECK(allocation1 == allocation2);
}
} // namespace webrtc
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