xref: /aosp_15_r20/external/webrtc/net/dcsctp/packet/parameter/state_cookie_parameter.h (revision d9f758449e529ab9291ac668be2861e7a55c2422)
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 #ifndef NET_DCSCTP_PACKET_PARAMETER_STATE_COOKIE_PARAMETER_H_
11 #define NET_DCSCTP_PACKET_PARAMETER_STATE_COOKIE_PARAMETER_H_
12 #include <stddef.h>
13 #include <stdint.h>
14 
15 #include <cstdint>
16 #include <string>
17 #include <vector>
18 
19 #include "absl/strings/string_view.h"
20 #include "api/array_view.h"
21 #include "net/dcsctp/packet/parameter/parameter.h"
22 #include "net/dcsctp/packet/tlv_trait.h"
23 
24 namespace dcsctp {
25 
26 // https://tools.ietf.org/html/rfc4960#section-3.3.3.1
27 struct StateCookieParameterConfig : ParameterConfig {
28   static constexpr int kType = 7;
29   static constexpr size_t kHeaderSize = 4;
30   static constexpr size_t kVariableLengthAlignment = 1;
31 };
32 
33 class StateCookieParameter : public Parameter,
34                              public TLVTrait<StateCookieParameterConfig> {
35  public:
36   static constexpr int kType = StateCookieParameterConfig::kType;
37 
StateCookieParameter(rtc::ArrayView<const uint8_t> data)38   explicit StateCookieParameter(rtc::ArrayView<const uint8_t> data)
39       : data_(data.begin(), data.end()) {}
40 
41   static absl::optional<StateCookieParameter> Parse(
42       rtc::ArrayView<const uint8_t> data);
43 
44   void SerializeTo(std::vector<uint8_t>& out) const override;
45   std::string ToString() const override;
46 
data()47   rtc::ArrayView<const uint8_t> data() const { return data_; }
48 
49  private:
50   std::vector<uint8_t> data_;
51 };
52 
53 }  // namespace dcsctp
54 
55 #endif  // NET_DCSCTP_PACKET_PARAMETER_STATE_COOKIE_PARAMETER_H_
56