89 lines
3.1 KiB
C
89 lines
3.1 KiB
C
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/*
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* Copyright 2019 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_TRANSPORT_H_
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#define PC_SCTP_TRANSPORT_H_
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#include <memory>
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#include "api/scoped_refptr.h"
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#include "api/sctp_transport_interface.h"
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#include "media/sctp/sctp_transport.h"
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#include "pc/dtls_transport.h"
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#include "rtc_base/synchronization/mutex.h"
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namespace webrtc {
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// This implementation wraps a cricket::SctpTransport, and takes
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// ownership of it.
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// This object must be constructed and updated on the networking thread,
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// the same thread as the one the cricket::SctpTransportInternal object
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// lives on.
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class SctpTransport : public SctpTransportInterface,
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public sigslot::has_slots<> {
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public:
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explicit SctpTransport(
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std::unique_ptr<cricket::SctpTransportInternal> internal);
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rtc::scoped_refptr<DtlsTransportInterface> dtls_transport() const override;
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SctpTransportInformation Information() const override;
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void RegisterObserver(SctpTransportObserverInterface* observer) override;
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void UnregisterObserver() override;
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// Internal functions
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void Clear();
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void SetDtlsTransport(rtc::scoped_refptr<DtlsTransport>);
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// Initialize the cricket::SctpTransport. This can be called from
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// the signaling thread.
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void Start(int local_port, int remote_port, int max_message_size);
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// TODO(https://bugs.webrtc.org/10629): Move functions that need
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// internal() to be functions on the webrtc::SctpTransport interface,
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// and make the internal() function private.
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cricket::SctpTransportInternal* internal() {
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MutexLock lock(&lock_);
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return internal_sctp_transport_.get();
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}
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const cricket::SctpTransportInternal* internal() const {
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MutexLock lock(&lock_);
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return internal_sctp_transport_.get();
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}
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protected:
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~SctpTransport() override;
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private:
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void UpdateInformation(SctpTransportState state);
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void OnInternalReadyToSendData();
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void OnAssociationChangeCommunicationUp();
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void OnInternalClosingProcedureStartedRemotely(int sid);
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void OnInternalClosingProcedureComplete(int sid);
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void OnDtlsStateChange(cricket::DtlsTransportInternal* transport,
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cricket::DtlsTransportState state);
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// Note - owner_thread never changes, but can't be const if we do
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// Invoke() on it.
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rtc::Thread* owner_thread_;
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mutable Mutex lock_;
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// Variables accessible off-thread, guarded by lock_
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SctpTransportInformation info_ RTC_GUARDED_BY(lock_);
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std::unique_ptr<cricket::SctpTransportInternal> internal_sctp_transport_
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RTC_GUARDED_BY(lock_);
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// Variables only accessed on-thread
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SctpTransportObserverInterface* observer_ RTC_GUARDED_BY(owner_thread_) =
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nullptr;
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rtc::scoped_refptr<DtlsTransport> dtls_transport_
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RTC_GUARDED_BY(owner_thread_);
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};
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} // namespace webrtc
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#endif // PC_SCTP_TRANSPORT_H_
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