diff options
Diffstat (limited to 'third_party/libwebrtc/net/dcsctp/packet/chunk/shutdown_chunk.cc')
-rw-r--r-- | third_party/libwebrtc/net/dcsctp/packet/chunk/shutdown_chunk.cc | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/third_party/libwebrtc/net/dcsctp/packet/chunk/shutdown_chunk.cc b/third_party/libwebrtc/net/dcsctp/packet/chunk/shutdown_chunk.cc new file mode 100644 index 0000000000..59f806f7f7 --- /dev/null +++ b/third_party/libwebrtc/net/dcsctp/packet/chunk/shutdown_chunk.cc @@ -0,0 +1,55 @@ +/* + * 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/chunk/shutdown_chunk.h" + +#include <stdint.h> + +#include <type_traits> +#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" + +namespace dcsctp { + +// https://tools.ietf.org/html/rfc4960#section-3.3.8 + +// 0 1 2 3 +// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Type = 7 | Chunk Flags | Length = 8 | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | Cumulative TSN Ack | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +constexpr int ShutdownChunk::kType; + +absl::optional<ShutdownChunk> ShutdownChunk::Parse( + rtc::ArrayView<const uint8_t> data) { + absl::optional<BoundedByteReader<kHeaderSize>> reader = ParseTLV(data); + if (!reader.has_value()) { + return absl::nullopt; + } + + TSN cumulative_tsn_ack(reader->Load32<4>()); + return ShutdownChunk(cumulative_tsn_ack); +} + +void ShutdownChunk::SerializeTo(std::vector<uint8_t>& out) const { + BoundedByteWriter<kHeaderSize> writer = AllocateTLV(out); + writer.Store32<4>(*cumulative_tsn_ack_); +} + +std::string ShutdownChunk::ToString() const { + return "SHUTDOWN"; +} +} // namespace dcsctp |