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/error_cause/protocol_violation_cause.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-3.3.10.13 28 29 // 0 1 2 3 30 // 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 31 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 32 // | Cause Code=13 | Cause Length=Variable | 33 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 34 // / Additional Information / 35 // \ \ 36 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 37 constexpr int ProtocolViolationCause::kType; 38 Parse(rtc::ArrayView<const uint8_t> data)39absl::optional<ProtocolViolationCause> ProtocolViolationCause::Parse( 40 rtc::ArrayView<const uint8_t> data) { 41 absl::optional<BoundedByteReader<kHeaderSize>> reader = ParseTLV(data); 42 if (!reader.has_value()) { 43 return absl::nullopt; 44 } 45 return ProtocolViolationCause( 46 std::string(reinterpret_cast<const char*>(reader->variable_data().data()), 47 reader->variable_data().size())); 48 } 49 SerializeTo(std::vector<uint8_t> & out) const50void ProtocolViolationCause::SerializeTo(std::vector<uint8_t>& out) const { 51 BoundedByteWriter<kHeaderSize> writer = 52 AllocateTLV(out, additional_information_.size()); 53 writer.CopyToVariableData(rtc::MakeArrayView( 54 reinterpret_cast<const uint8_t*>(additional_information_.data()), 55 additional_information_.size())); 56 } 57 ToString() const58std::string ProtocolViolationCause::ToString() const { 59 rtc::StringBuilder sb; 60 sb << "Protocol Violation, additional_information=" 61 << additional_information_; 62 return sb.Release(); 63 } 64 65 } // namespace dcsctp 66