blob: 2853915b0cf0d3dea48f440e7184134fbb36f86d [file] [log] [blame]
/*
* Copyright (c) 2021 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "net/dcsctp/packet/error_cause/no_user_data_cause.h"
#include <stdint.h>
#include <string>
#include <type_traits>
#include <vector>
#include "absl/types/optional.h"
#include "api/array_view.h"
#include "net/dcsctp/packet/bounded_byte_reader.h"
#include "net/dcsctp/packet/bounded_byte_writer.h"
#include "net/dcsctp/packet/tlv_trait.h"
#include "rtc_base/strings/string_builder.h"
namespace dcsctp {
// https://tools.ietf.org/html/rfc4960#section-3.3.10.9
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// | Cause Code=9 | Cause Length=8 |
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// / TSN value /
// \ \
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
constexpr int NoUserDataCause::kType;
absl::optional<NoUserDataCause> NoUserDataCause::Parse(
rtc::ArrayView<const uint8_t> data) {
absl::optional<BoundedByteReader<kHeaderSize>> reader = ParseTLV(data);
if (!reader.has_value()) {
return absl::nullopt;
}
TSN tsn(reader->Load32<4>());
return NoUserDataCause(tsn);
}
void NoUserDataCause::SerializeTo(std::vector<uint8_t>& out) const {
BoundedByteWriter<kHeaderSize> writer = AllocateTLV(out);
writer.Store32<4>(*tsn_);
}
std::string NoUserDataCause::ToString() const {
rtc::StringBuilder sb;
sb << "No User Data, tsn=" << *tsn_;
return sb.Release();
}
} // namespace dcsctp