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/*
* 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/parameter/add_incoming_streams_request_parameter.h"
#include <stdint.h>
#include <string>
#include <type_traits>
#include <vector>
#include "absl/types/optional.h"
#include "api/array_view.h"
#include "net/dcsctp/common/internal_types.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/rfc6525#section-4.6
// 0 1 2 3
// 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
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// | Parameter Type = 18 | Parameter Length = 12 |
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// | Re-configuration Request Sequence Number |
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// | Number of new streams | Reserved |
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
constexpr int AddIncomingStreamsRequestParameter::kType;
absl::optional<AddIncomingStreamsRequestParameter>
AddIncomingStreamsRequestParameter::Parse(rtc::ArrayView<const uint8_t> data) {
absl::optional<BoundedByteReader<kHeaderSize>> reader = ParseTLV(data);
if (!reader.has_value()) {
return absl::nullopt;
}
ReconfigRequestSN request_sequence_number(reader->Load32<4>());
uint16_t nbr_of_new_streams = reader->Load16<8>();
return AddIncomingStreamsRequestParameter(request_sequence_number,
nbr_of_new_streams);
}
void AddIncomingStreamsRequestParameter::SerializeTo(
std::vector<uint8_t>& out) const {
BoundedByteWriter<kHeaderSize> writer = AllocateTLV(out);
writer.Store32<4>(*request_sequence_number_);
writer.Store16<8>(nbr_of_new_streams_);
}
std::string AddIncomingStreamsRequestParameter::ToString() const {
rtc::StringBuilder sb;
sb << "Add Incoming Streams Request, req_seq_nbr="
<< *request_sequence_number();
return sb.Release();
}
} // namespace dcsctp
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