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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.
*/
#ifndef NET_DCSCTP_PACKET_PARAMETER_RECONFIGURATION_RESPONSE_PARAMETER_H_
#define NET_DCSCTP_PACKET_PARAMETER_RECONFIGURATION_RESPONSE_PARAMETER_H_
#include <stddef.h>
#include <cstdint>
#include <string>
#include <vector>
#include "absl/strings/string_view.h"
#include "absl/types/optional.h"
#include "api/array_view.h"
#include "net/dcsctp/common/internal_types.h"
#include "net/dcsctp/packet/parameter/parameter.h"
#include "net/dcsctp/packet/tlv_trait.h"
namespace dcsctp {
// https://tools.ietf.org/html/rfc6525#section-4.4
struct ReconfigurationResponseParameterConfig : ParameterConfig {
static constexpr int kType = 16;
static constexpr size_t kHeaderSize = 12;
static constexpr size_t kVariableLengthAlignment = 4;
};
class ReconfigurationResponseParameter
: public Parameter,
public TLVTrait<ReconfigurationResponseParameterConfig> {
public:
static constexpr int kType = ReconfigurationResponseParameterConfig::kType;
enum class Result {
kSuccessNothingToDo = 0,
kSuccessPerformed = 1,
kDenied = 2,
kErrorWrongSSN = 3,
kErrorRequestAlreadyInProgress = 4,
kErrorBadSequenceNumber = 5,
kInProgress = 6,
};
ReconfigurationResponseParameter(ReconfigRequestSN response_sequence_number,
Result result)
: response_sequence_number_(response_sequence_number),
result_(result),
sender_next_tsn_(absl::nullopt),
receiver_next_tsn_(absl::nullopt) {}
explicit ReconfigurationResponseParameter(
ReconfigRequestSN response_sequence_number,
Result result,
TSN sender_next_tsn,
TSN receiver_next_tsn)
: response_sequence_number_(response_sequence_number),
result_(result),
sender_next_tsn_(sender_next_tsn),
receiver_next_tsn_(receiver_next_tsn) {}
static absl::optional<ReconfigurationResponseParameter> Parse(
rtc::ArrayView<const uint8_t> data);
void SerializeTo(std::vector<uint8_t>& out) const override;
std::string ToString() const override;
ReconfigRequestSN response_sequence_number() const {
return response_sequence_number_;
}
Result result() const { return result_; }
absl::optional<TSN> sender_next_tsn() const { return sender_next_tsn_; }
absl::optional<TSN> receiver_next_tsn() const { return receiver_next_tsn_; }
private:
static constexpr size_t kNextTsnHeaderSize = 8;
ReconfigRequestSN response_sequence_number_;
Result result_;
absl::optional<TSN> sender_next_tsn_;
absl::optional<TSN> receiver_next_tsn_;
};
absl::string_view ToString(ReconfigurationResponseParameter::Result result);
} // namespace dcsctp
#endif // NET_DCSCTP_PACKET_PARAMETER_RECONFIGURATION_RESPONSE_PARAMETER_H_
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