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+/*
+ * libjingle
+ * Copyright 2004--2005, Google Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+ * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _CRICKET_P2P_BASE_RAWTRANSPORTCHANNEL_H_
+#define _CRICKET_P2P_BASE_RAWTRANSPORTCHANNEL_H_
+
+#include "talk/base/messagequeue.h"
+#include "talk/p2p/base/transportchannelimpl.h"
+#include "talk/p2p/base/rawtransport.h"
+#include "talk/p2p/base/candidate.h"
+
+namespace cricket {
+
+class Port;
+class Connection;
+class StunPort;
+class RelayPort;
+class PortAllocator;
+class PortAllocatorSession;
+
+// Implements a channel that just sends bare packets once we have received the
+// address of the other side. We pick a single address to send them based on
+// a simple investigation of NAT type.
+class RawTransportChannel : public TransportChannelImpl,
+ public talk_base::MessageHandler {
+ public:
+ RawTransportChannel(const std::string &name,
+ const std::string &session_type,
+ RawTransport* transport,
+ PortAllocator *allocator);
+ virtual ~RawTransportChannel();
+
+ // Implementation of normal channel packet sending.
+ virtual int SendPacket(const char *data, size_t len);
+ virtual int SetOption(talk_base::Socket::Option opt, int value);
+ virtual int GetError();
+
+ // Returns the raw transport that created this channel.
+ virtual Transport* GetTransport() { return raw_transport_; }
+
+ // Creates an allocator session to start figuring out which type of port we
+ // should send to the other client. This will send SignalChannelMessage once
+ // we have decided.
+ virtual void Connect();
+
+ // Resets state back to unconnected.
+ virtual void Reset();
+
+ // We don't actually worry about signaling since we can't send new candidates.
+ virtual void OnSignalingReady() {}
+
+ // Handles a message setting the remote address. We are writable once we
+ // have this since we now know where to send.
+ virtual void OnChannelMessage(const buzz::XmlElement* msg);
+
+ private:
+ RawTransport* raw_transport_;
+ PortAllocator* allocator_;
+ PortAllocatorSession* allocator_session_;
+ StunPort* stun_port_;
+ RelayPort* relay_port_;
+ Port* port_;
+ bool use_relay_;
+ talk_base::SocketAddress remote_address_;
+
+ // Called when the allocator creates another port.
+ void OnPortReady(PortAllocatorSession* session, Port* port);
+
+ // Called when one of the ports we are using has determined its address.
+ void OnCandidatesReady(PortAllocatorSession *session,
+ const std::vector<Candidate>& candidates);
+
+ // Called once we have chosen the port to use for communication with the
+ // other client. This will send its address and prepare the port for use.
+ void SetPort(Port* port);
+
+ // Called once we have a port and a remote address. This will set mark the
+ // channel as writable and signal the route to the client.
+ void SetWritable();
+
+ // Called when we receive a packet from the other client.
+ void OnReadPacket(Port* port, const char* data, size_t size,
+ const talk_base::SocketAddress& addr);
+
+ // Handles a message to destroy unused ports.
+ virtual void OnMessage(talk_base::Message *msg);
+
+ DISALLOW_EVIL_CONSTRUCTORS(RawTransportChannel);
+};
+
+} // namespace cricket
+
+#endif // _CRICKET_P2P_BASE_RAWTRANSPORTCHANNEL_H_