From 6bf0a5cb5034a7e684dcc3500e841785237ce2dd Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 19:32:43 +0200
Subject: Adding upstream version 1:115.7.0.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 .../test/fuzzers/flexfec_receiver_fuzzer.cc        | 71 ++++++++++++++++++++++
 1 file changed, 71 insertions(+)
 create mode 100644 third_party/libwebrtc/test/fuzzers/flexfec_receiver_fuzzer.cc

(limited to 'third_party/libwebrtc/test/fuzzers/flexfec_receiver_fuzzer.cc')

diff --git a/third_party/libwebrtc/test/fuzzers/flexfec_receiver_fuzzer.cc b/third_party/libwebrtc/test/fuzzers/flexfec_receiver_fuzzer.cc
new file mode 100644
index 0000000000..67d603d3fc
--- /dev/null
+++ b/third_party/libwebrtc/test/fuzzers/flexfec_receiver_fuzzer.cc
@@ -0,0 +1,71 @@
+/*
+ *  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
-- 
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