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https://github.com/mollyim/webrtc.git
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b87746b155
Quite a large commit, but mostly trivial. It adds all the (in dcSCTP) supported parameters, error causes and chunks as an object model, with serializers and deserializers. They are verified with packet captures where available, that have been captured with Wireshark against a reference implementation. This _could_ be split in parameter/ as one commit, error_cause/ in the following, and chunk/ as the third, but as each chunk/parameter is completely isolated from the other, reviewing it should be linear with the number of chunks/parameters and having them in more commits wouldn't change that, taken all those three commits into account. Bug: webrtc:12614 Change-Id: Ie83c9a22cae6e3a39e35ef26fd532837a6387a08 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/213347 Commit-Queue: Victor Boivie <boivie@webrtc.org> Reviewed-by: Tommi <tommi@webrtc.org> Cr-Commit-Position: refs/heads/master@{#33625}
97 lines
3 KiB
C++
97 lines
3 KiB
C++
/*
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* Copyright (c) 2021 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef NET_DCSCTP_PACKET_CHUNK_DATA_COMMON_H_
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#define NET_DCSCTP_PACKET_CHUNK_DATA_COMMON_H_
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#include <stdint.h>
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#include <utility>
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#include <vector>
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#include "api/array_view.h"
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#include "net/dcsctp/packet/chunk/chunk.h"
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#include "net/dcsctp/packet/data.h"
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namespace dcsctp {
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// Base class for DataChunk and IDataChunk
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class AnyDataChunk : public Chunk {
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public:
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// Represents the "immediate ack" flag on DATA/I-DATA, from RFC7053.
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using ImmediateAckFlag = StrongAlias<class ImmediateAckFlagTag, bool>;
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// Data chunk options.
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// See https://tools.ietf.org/html/rfc4960#section-3.3.1
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struct Options {
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Data::IsEnd is_end = Data::IsEnd(false);
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Data::IsBeginning is_beginning = Data::IsBeginning(false);
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IsUnordered is_unordered = IsUnordered(false);
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ImmediateAckFlag immediate_ack = ImmediateAckFlag(false);
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};
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TSN tsn() const { return tsn_; }
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Options options() const {
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Options options;
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options.is_end = data_.is_end;
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options.is_beginning = data_.is_beginning;
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options.is_unordered = data_.is_unordered;
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options.immediate_ack = immediate_ack_;
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return options;
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}
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StreamID stream_id() const { return data_.stream_id; }
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SSN ssn() const { return data_.ssn; }
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MID message_id() const { return data_.message_id; }
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FSN fsn() const { return data_.fsn; }
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PPID ppid() const { return data_.ppid; }
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rtc::ArrayView<const uint8_t> payload() const { return data_.payload; }
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// Extracts the Data from the chunk, as a destructive action.
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Data extract() && { return std::move(data_); }
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AnyDataChunk(TSN tsn,
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StreamID stream_id,
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SSN ssn,
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MID message_id,
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FSN fsn,
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PPID ppid,
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std::vector<uint8_t> payload,
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const Options& options)
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: tsn_(tsn),
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data_(stream_id,
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ssn,
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message_id,
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fsn,
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ppid,
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std::move(payload),
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options.is_beginning,
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options.is_end,
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options.is_unordered),
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immediate_ack_(options.immediate_ack) {}
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AnyDataChunk(TSN tsn, Data data, bool immediate_ack)
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: tsn_(tsn), data_(std::move(data)), immediate_ack_(immediate_ack) {}
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protected:
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// Bits in `flags` header field.
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static constexpr int kFlagsBitEnd = 0;
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static constexpr int kFlagsBitBeginning = 1;
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static constexpr int kFlagsBitUnordered = 2;
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static constexpr int kFlagsBitImmediateAck = 3;
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private:
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TSN tsn_;
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Data data_;
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ImmediateAckFlag immediate_ack_;
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};
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} // namespace dcsctp
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#endif // NET_DCSCTP_PACKET_CHUNK_DATA_COMMON_H_
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