1 files changed, 64 insertions, 0 deletions
diff --git a/third_party/libwebrtc/net/dcsctp/packet/error_cause/unrecognized_chunk_type_cause.cc b/third_party/libwebrtc/net/dcsctp/packet/error_cause/unrecognized_chunk_type_cause.cc
new file mode 100644
index 0000000000..04b960d992
--- /dev/null
+++ b/third_party/libwebrtc/net/dcsctp/packet/error_cause/unrecognized_chunk_type_cause.cc
@@ -0,0 +1,64 @@
+/*
+ *  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 "net/dcsctp/packet/error_cause/unrecognized_chunk_type_cause.h"
+
+#include <cstdint>
+#include <string>
+#include <utility>
+#include <vector>
+
+#include "absl/types/optional.h"
+#include "api/array_view.h"
+#include "net/dcsctp/packet/bounded_byte_reader.h"
+#include "net/dcsctp/packet/bounded_byte_writer.h"
+#include "net/dcsctp/packet/tlv_trait.h"
+#include "rtc_base/strings/string_builder.h"
+
+namespace dcsctp {
+
+// https://tools.ietf.org/html/rfc4960#section-3.3.10.6
+
+//  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+//  |     Cause Code=6              |      Cause Length             |
+//  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+//  /                  Unrecognized Chunk                           /
+//  \                                                               \
+//  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+constexpr int UnrecognizedChunkTypeCause::kType;
+
+absl::optional<UnrecognizedChunkTypeCause> UnrecognizedChunkTypeCause::Parse(
+    rtc::ArrayView<const uint8_t> data) {
+  absl::optional<BoundedByteReader<kHeaderSize>> reader = ParseTLV(data);
+  if (!reader.has_value()) {
+    return absl::nullopt;
+  }
+  std::vector<uint8_t> unrecognized_chunk(reader->variable_data().begin(),
+                                          reader->variable_data().end());
+  return UnrecognizedChunkTypeCause(std::move(unrecognized_chunk));
+}
+
+void UnrecognizedChunkTypeCause::SerializeTo(std::vector<uint8_t>& out) const {
+  BoundedByteWriter<kHeaderSize> writer =
+      AllocateTLV(out, unrecognized_chunk_.size());
+  writer.CopyToVariableData(unrecognized_chunk_);
+}
+
+std::string UnrecognizedChunkTypeCause::ToString() const {
+  rtc::StringBuilder sb;
+  sb << "Unrecognized Chunk Type, chunk_type=";
+  if (!unrecognized_chunk_.empty()) {
+    sb << static_cast<int>(unrecognized_chunk_[0]);
+  } else {
+    sb << "<missing>";
+  }
+  return sb.Release();
+}
+
+}  // namespace dcsctp