Introduce RtpTransportInternal and SrtpTransport.

webrtc/pc/srtptransport.h

+/*
+ *  Copyright 2017 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 WEBRTC_PC_SRTPTRANSPORT_H_
+#define WEBRTC_PC_SRTPTRANSPORT_H_
+
+#include <memory>
+#include <string>
+#include <utility>
+
+#include "webrtc/pc/rtptransportinternal.h"
+#include "webrtc/pc/srtpfilter.h"
+#include "webrtc/rtc_base/checks.h"
+
+namespace webrtc {
+
+// This class will eventually be a wrapper around RtpTransportInternal
+// that protects and unprotects sent and received RTP packets. This
+// functionality is currently implemented by SrtpFilter and BaseChannel, but
+// will be moved here in the future.
+class SrtpTransport : public RtpTransportInternal {
+ public:
+  SrtpTransport(bool rtcp_mux_enabled, const std::string& content_name);
+
+  // TODO(zstein): Consider taking an RtpTransport instead of an
+  // RtpTransportInternal.
+  SrtpTransport(std::unique_ptr<RtpTransportInternal> transport,
+                const std::string& content_name);
+
+  void SetRtcpMuxEnabled(bool enable) override {
+    rtp_transport_->SetRtcpMuxEnabled(enable);
+  }
+
+  rtc::PacketTransportInternal* rtp_packet_transport() const override {
+    return rtp_transport_->rtp_packet_transport();
+  }
+
+  void SetRtpPacketTransport(rtc::PacketTransportInternal* rtp) override {
+    rtp_transport_->SetRtpPacketTransport(rtp);
+  }
+
+  PacketTransportInterface* GetRtpPacketTransport() const override {
+    return rtp_transport_->GetRtpPacketTransport();
+  }
+
+  rtc::PacketTransportInternal* rtcp_packet_transport() const override {
+    return rtp_transport_->rtcp_packet_transport();
+  }
+  void SetRtcpPacketTransport(rtc::PacketTransportInternal* rtcp) override {
+    rtp_transport_->SetRtcpPacketTransport(rtcp);
+  }
+
+  PacketTransportInterface* GetRtcpPacketTransport() const override {
+    return rtp_transport_->GetRtcpPacketTransport();
+  }
+
+  bool IsWritable(bool rtcp) const override {
+    return rtp_transport_->IsWritable(rtcp);
+  }
+
+  bool SendPacket(bool rtcp,
+                  rtc::CopyOnWriteBuffer* packet,
+                  const rtc::PacketOptions& options,
+                  int flags) override;
+
+  bool HandlesPayloadType(int payload_type) const override {
+    return rtp_transport_->HandlesPayloadType(payload_type);
+  }
+
+  void AddHandledPayloadType(int payload_type) override {
+    rtp_transport_->AddHandledPayloadType(payload_type);
+  }
+
+  RtcpParameters GetRtcpParameters() const override {
+    return rtp_transport_->GetRtcpParameters();
+  }
+
+  RTCError SetRtcpParameters(const RtcpParameters& parameters) override {
+    return rtp_transport_->SetRtcpParameters(parameters);
+  }
+
+  // TODO(zstein): Remove this when we remove RtpTransportAdapter.
+  RtpTransportAdapter* GetInternal() override { return nullptr; }
+
+ private:
+  void ConnectToRtpTransport();
+
+  void OnPacketReceived(bool rtcp,
+                        rtc::CopyOnWriteBuffer* packet,
+                        const rtc::PacketTime& packet_time);
+
+  void OnReadyToSend(bool ready) { SignalReadyToSend(ready); }
+
+  const std::string content_name_;
+
+  std::unique_ptr<RtpTransportInternal> rtp_transport_;
+};
+
+}  // namespace webrtc
+
+#endif  // WEBRTC_PC_SRTPTRANSPORT_H_