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/user_initiated_abort_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-3.3.10.12 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=12 | Cause Length=Variable | 33 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 34 // / Upper Layer Abort Reason / 35 // \ \ 36 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 37 constexpr int UserInitiatedAbortCause::kType; 38 Parse(rtc::ArrayView<const uint8_t> data)39absl::optional<UserInitiatedAbortCause> UserInitiatedAbortCause::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 if (reader->variable_data().empty()) { 46 return UserInitiatedAbortCause(""); 47 } 48 return UserInitiatedAbortCause( 49 std::string(reinterpret_cast<const char*>(reader->variable_data().data()), 50 reader->variable_data().size())); 51 } 52 SerializeTo(std::vector<uint8_t> & out) const53void UserInitiatedAbortCause::SerializeTo(std::vector<uint8_t>& out) const { 54 BoundedByteWriter<kHeaderSize> writer = 55 AllocateTLV(out, upper_layer_abort_reason_.size()); 56 writer.CopyToVariableData(rtc::MakeArrayView( 57 reinterpret_cast<const uint8_t*>(upper_layer_abort_reason_.data()), 58 upper_layer_abort_reason_.size())); 59 } 60 ToString() const61std::string UserInitiatedAbortCause::ToString() const { 62 rtc::StringBuilder sb; 63 sb << "User-Initiated Abort, reason=" << upper_layer_abort_reason_; 64 return sb.Release(); 65 } 66 67 } // namespace dcsctp 68