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/parameter/state_cookie_parameter.h" 11 12 #include <stdint.h> 13 14 #include <string> 15 #include <type_traits> 16 #include <vector> 17 18 #include "absl/types/optional.h" 19 #include "api/array_view.h" 20 #include "net/dcsctp/packet/bounded_byte_reader.h" 21 #include "net/dcsctp/packet/bounded_byte_writer.h" 22 #include "net/dcsctp/packet/tlv_trait.h" 23 #include "rtc_base/strings/string_builder.h" 24 25 namespace dcsctp { 26 27 // https://tools.ietf.org/html/rfc4960#section-3.3.3.1 28 29 constexpr int StateCookieParameter::kType; 30 Parse(rtc::ArrayView<const uint8_t> data)31absl::optional<StateCookieParameter> StateCookieParameter::Parse( 32 rtc::ArrayView<const uint8_t> data) { 33 absl::optional<BoundedByteReader<kHeaderSize>> reader = ParseTLV(data); 34 if (!reader.has_value()) { 35 return absl::nullopt; 36 } 37 return StateCookieParameter(reader->variable_data()); 38 } 39 SerializeTo(std::vector<uint8_t> & out) const40void StateCookieParameter::SerializeTo(std::vector<uint8_t>& out) const { 41 BoundedByteWriter<kHeaderSize> writer = AllocateTLV(out, data_.size()); 42 writer.CopyToVariableData(data_); 43 } 44 ToString() const45std::string StateCookieParameter::ToString() const { 46 rtc::StringBuilder sb; 47 sb << "State Cookie parameter (cookie_length=" << data_.size() << ")"; 48 return sb.Release(); 49 } 50 51 } // namespace dcsctp 52