1 files changed, 101 insertions, 0 deletions
diff --git a/third_party/libwebrtc/pc/sctp_transport.h b/third_party/libwebrtc/pc/sctp_transport.h
new file mode 100644
index 0000000000..35e7656100
--- /dev/null
+++ b/third_party/libwebrtc/pc/sctp_transport.h
@@ -0,0 +1,101 @@
+/*
+ *  Copyright 2019 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 PC_SCTP_TRANSPORT_H_
+#define PC_SCTP_TRANSPORT_H_
+
+#include <memory>
+
+#include "api/dtls_transport_interface.h"
+#include "api/scoped_refptr.h"
+#include "api/sctp_transport_interface.h"
+#include "api/sequence_checker.h"
+#include "api/transport/data_channel_transport_interface.h"
+#include "media/sctp/sctp_transport_internal.h"
+#include "p2p/base/dtls_transport_internal.h"
+#include "pc/dtls_transport.h"
+#include "rtc_base/checks.h"
+#include "rtc_base/thread.h"
+#include "rtc_base/thread_annotations.h"
+
+namespace webrtc {
+
+// This implementation wraps a cricket::SctpTransport, and takes
+// ownership of it.
+// This object must be constructed and updated on the networking thread,
+// the same thread as the one the cricket::SctpTransportInternal object
+// lives on.
+class SctpTransport : public SctpTransportInterface,
+                      public DataChannelTransportInterface {
+ public:
+  explicit SctpTransport(
+      std::unique_ptr<cricket::SctpTransportInternal> internal);
+
+  // SctpTransportInterface
+  rtc::scoped_refptr<DtlsTransportInterface> dtls_transport() const override;
+  SctpTransportInformation Information() const override;
+  void RegisterObserver(SctpTransportObserverInterface* observer) override;
+  void UnregisterObserver() override;
+
+  // DataChannelTransportInterface
+  RTCError OpenChannel(int channel_id) override;
+  RTCError SendData(int channel_id,
+                    const SendDataParams& params,
+                    const rtc::CopyOnWriteBuffer& buffer) override;
+  RTCError CloseChannel(int channel_id) override;
+  void SetDataSink(DataChannelSink* sink) override;
+  bool IsReadyToSend() const override;
+
+  // Internal functions
+  void Clear();
+  void SetDtlsTransport(rtc::scoped_refptr<DtlsTransport>);
+  // Initialize the cricket::SctpTransport. This can be called from
+  // the signaling thread.
+  void Start(int local_port, int remote_port, int max_message_size);
+
+  // TODO(https://bugs.webrtc.org/10629): Move functions that need
+  // internal() to be functions on the webrtc::SctpTransport interface,
+  // and make the internal() function private.
+  cricket::SctpTransportInternal* internal() {
+    RTC_DCHECK_RUN_ON(owner_thread_);
+    return internal_sctp_transport_.get();
+  }
+
+  const cricket::SctpTransportInternal* internal() const {
+    RTC_DCHECK_RUN_ON(owner_thread_);
+    return internal_sctp_transport_.get();
+  }
+
+ protected:
+  ~SctpTransport() override;
+
+ private:
+  void UpdateInformation(SctpTransportState state);
+  void OnInternalReadyToSendData();
+  void OnAssociationChangeCommunicationUp();
+  void OnInternalClosingProcedureStartedRemotely(int sid);
+  void OnInternalClosingProcedureComplete(int sid);
+  void OnDtlsStateChange(cricket::DtlsTransportInternal* transport,
+                         DtlsTransportState state);
+
+  // NOTE: `owner_thread_` is the thread that the SctpTransport object is
+  // constructed on. In the context of PeerConnection, it's the network thread.
+  rtc::Thread* const owner_thread_;
+  SctpTransportInformation info_ RTC_GUARDED_BY(owner_thread_);
+  std::unique_ptr<cricket::SctpTransportInternal> internal_sctp_transport_
+      RTC_GUARDED_BY(owner_thread_);
+  SctpTransportObserverInterface* observer_ RTC_GUARDED_BY(owner_thread_) =
+      nullptr;
+  rtc::scoped_refptr<DtlsTransport> dtls_transport_
+      RTC_GUARDED_BY(owner_thread_);
+};
+
+}  // namespace webrtc
+#endif  // PC_SCTP_TRANSPORT_H_