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4c842224e1
Bug: webrtc:11547 Change-Id: Iea2d706228b5a533eb7fae84613462165d7c9b54 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/298300 Auto-Submit: Tomas Gunnarsson <tommi@webrtc.org> Reviewed-by: Danil Chapovalov <danilchap@webrtc.org> Commit-Queue: Tomas Gunnarsson <tommi@webrtc.org> Cr-Commit-Position: refs/heads/main@{#39618}
94 lines
3.8 KiB
C++
94 lines
3.8 KiB
C++
/*
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* Copyright 2013 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 PC_SCTP_UTILS_H_
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#define PC_SCTP_UTILS_H_
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#include <string>
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#include "api/data_channel_interface.h"
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#include "api/transport/data_channel_transport_interface.h"
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#include "media/base/media_channel.h"
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#include "media/sctp/sctp_transport_internal.h"
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#include "net/dcsctp/public/types.h"
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#include "rtc_base/copy_on_write_buffer.h"
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#include "rtc_base/ssl_stream_adapter.h" // For SSLRole
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namespace rtc {
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class CopyOnWriteBuffer;
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} // namespace rtc
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namespace webrtc {
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struct DataChannelInit;
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// Wraps the `uint16_t` sctp data channel stream id value and does range
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// checking. The class interface is `int` based to ease with DataChannelInit
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// compatibility and types used in `DataChannelController`'s interface. Going
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// forward, `int` compatibility won't be needed and we can either just use
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// this class or the internal dcsctp::StreamID type.
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class StreamId {
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public:
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StreamId() = default;
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explicit StreamId(int id)
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: id_(id >= cricket::kMinSctpSid && id <= cricket::kSpecMaxSctpSid
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? absl::optional<uint16_t>(static_cast<uint16_t>(id))
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: absl::nullopt) {}
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StreamId(const StreamId& sid) = default;
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StreamId& operator=(const StreamId& sid) = default;
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// Returns `true` if a valid stream id is contained, in the range of
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// kMinSctpSid - kSpecMaxSctpSid ([0..0xffff]). Note that this
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// is different than having `kMaxSctpSid` as the upper bound, which is
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// the limit that is internally used by `SctpSidAllocator`. Sid values may
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// be assigned to `StreamId` outside of `SctpSidAllocator` and have a higher
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// id value than supplied by `SctpSidAllocator`, yet is still valid.
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bool HasValue() const { return id_.has_value(); }
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// Provided for compatibility with existing code that hasn't been updated
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// to use `StreamId` directly. New code should not use 'int' for the stream
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// id but rather `StreamId` directly.
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int stream_id_int() const {
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return id_.has_value() ? static_cast<int>(id_.value().value()) : -1;
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}
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void reset() { id_ = absl::nullopt; }
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bool operator==(const StreamId& sid) const { return id_ == sid.id_; }
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bool operator<(const StreamId& sid) const { return id_ < sid.id_; }
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bool operator!=(const StreamId& sid) const { return !(operator==(sid)); }
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private:
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absl::optional<dcsctp::StreamID> id_;
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};
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// Read the message type and return true if it's an OPEN message.
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bool IsOpenMessage(const rtc::CopyOnWriteBuffer& payload);
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bool ParseDataChannelOpenMessage(const rtc::CopyOnWriteBuffer& payload,
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std::string* label,
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DataChannelInit* config);
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bool ParseDataChannelOpenAckMessage(const rtc::CopyOnWriteBuffer& payload);
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bool WriteDataChannelOpenMessage(const std::string& label,
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const std::string& protocol,
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absl::optional<Priority> priority,
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bool ordered,
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absl::optional<int> max_retransmits,
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absl::optional<int> max_retransmit_time,
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rtc::CopyOnWriteBuffer* payload);
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bool WriteDataChannelOpenMessage(const std::string& label,
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const DataChannelInit& config,
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rtc::CopyOnWriteBuffer* payload);
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void WriteDataChannelOpenAckMessage(rtc::CopyOnWriteBuffer* payload);
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} // namespace webrtc
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#endif // PC_SCTP_UTILS_H_
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