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/cookie_echo_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-3.3.11 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 = 10 |Chunk Flags | Length | 31 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 32 // / Cookie / 33 // \ \ 34 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 35 constexpr int CookieEchoChunk::kType; 36 Parse(rtc::ArrayView<const uint8_t> data)37absl::optional<CookieEchoChunk> CookieEchoChunk::Parse( 38 rtc::ArrayView<const uint8_t> data) { 39 absl::optional<BoundedByteReader<kHeaderSize>> reader = ParseTLV(data); 40 if (!reader.has_value()) { 41 return absl::nullopt; 42 } 43 return CookieEchoChunk(reader->variable_data()); 44 } 45 SerializeTo(std::vector<uint8_t> & out) const46void CookieEchoChunk::SerializeTo(std::vector<uint8_t>& out) const { 47 BoundedByteWriter<kHeaderSize> writer = AllocateTLV(out, cookie_.size()); 48 writer.CopyToVariableData(cookie_); 49 } 50 ToString() const51std::string CookieEchoChunk::ToString() const { 52 return "COOKIE-ECHO"; 53 } 54 } // namespace dcsctp 55