Victor Boivie | b87746b | 2021-03-30 17:50:17 | [diff] [blame] | 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/ssn_tsn_reset_request_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/rfc6525#section-4.3 |
| 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 | // | Parameter Type = 15 | Parameter Length = 8 | |
| 33 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 34 | // | Re-configuration Request Sequence Number | |
| 35 | // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 36 | constexpr int SSNTSNResetRequestParameter::kType; |
| 37 | |
| 38 | absl::optional<SSNTSNResetRequestParameter> SSNTSNResetRequestParameter::Parse( |
| 39 | rtc::ArrayView<const uint8_t> data) { |
| 40 | absl::optional<BoundedByteReader<kHeaderSize>> reader = ParseTLV(data); |
| 41 | if (!reader.has_value()) { |
| 42 | return absl::nullopt; |
| 43 | } |
| 44 | ReconfigRequestSN request_sequence_number(reader->Load32<4>()); |
| 45 | |
| 46 | return SSNTSNResetRequestParameter(request_sequence_number); |
| 47 | } |
| 48 | |
| 49 | void SSNTSNResetRequestParameter::SerializeTo(std::vector<uint8_t>& out) const { |
| 50 | BoundedByteWriter<kHeaderSize> writer = AllocateTLV(out); |
| 51 | writer.Store32<4>(*request_sequence_number_); |
| 52 | } |
| 53 | |
| 54 | std::string SSNTSNResetRequestParameter::ToString() const { |
| 55 | rtc::StringBuilder sb; |
| 56 | sb << "SSN/TSN Reset Request, req_seq_nbr=" << *request_sequence_number(); |
| 57 | return sb.Release(); |
| 58 | } |
| 59 | |
| 60 | } // namespace dcsctp |