1 /* 2 * Copyright (c) 2021 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 #include "net/dcsctp/packet/chunk/shutdown_complete_chunk.h" 11 12 #include <stdint.h> 13 14 #include <type_traits> 15 #include <vector> 16 17 #include "absl/types/optional.h" 18 #include "api/array_view.h" 19 #include "net/dcsctp/packet/bounded_byte_reader.h" 20 #include "net/dcsctp/packet/bounded_byte_writer.h" 21 #include "net/dcsctp/packet/tlv_trait.h" 22 23 namespace dcsctp { 24 25 // https://tools.ietf.org/html/rfc4960#section-3.3.13 26 27 // 0 1 2 3 28 // 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 29 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 30 // | Type = 14 |Reserved |T| Length = 4 | 31 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 32 constexpr int ShutdownCompleteChunk::kType; 33 Parse(rtc::ArrayView<const uint8_t> data)34absl::optional<ShutdownCompleteChunk> ShutdownCompleteChunk::Parse( 35 rtc::ArrayView<const uint8_t> data) { 36 absl::optional<BoundedByteReader<kHeaderSize>> reader = ParseTLV(data); 37 if (!reader.has_value()) { 38 return absl::nullopt; 39 } 40 uint8_t flags = reader->Load8<1>(); 41 bool tag_reflected = (flags & (1 << kFlagsBitT)) != 0; 42 return ShutdownCompleteChunk(tag_reflected); 43 } 44 SerializeTo(std::vector<uint8_t> & out) const45void ShutdownCompleteChunk::SerializeTo(std::vector<uint8_t>& out) const { 46 BoundedByteWriter<kHeaderSize> writer = AllocateTLV(out); 47 writer.Store8<1>(tag_reflected_ ? (1 << kFlagsBitT) : 0); 48 } 49 ToString() const50std::string ShutdownCompleteChunk::ToString() const { 51 return "SHUTDOWN-COMPLETE"; 52 } 53 54 } // namespace dcsctp 55