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      1 /*
      2  * libjingle
      3  * Copyright 2004--2005, Google Inc.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions are met:
      7  *
      8  *  1. Redistributions of source code must retain the above copyright notice,
      9  *     this list of conditions and the following disclaimer.
     10  *  2. Redistributions in binary form must reproduce the above copyright notice,
     11  *     this list of conditions and the following disclaimer in the documentation
     12  *     and/or other materials provided with the distribution.
     13  *  3. The name of the author may not be used to endorse or promote products
     14  *     derived from this software without specific prior written permission.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
     17  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     18  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
     19  * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     20  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
     22  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     23  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
     24  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
     25  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 #ifndef TALK_P2P_BASE_RAWTRANSPORT_H_
     29 #define TALK_P2P_BASE_RAWTRANSPORT_H_
     30 
     31 #include <string>
     32 #include "talk/p2p/base/transport.h"
     33 
     34 #if defined(FEATURE_ENABLE_PSTN)
     35 namespace cricket {
     36 
     37 // Implements a transport that only sends raw packets, no STUN.  As a result,
     38 // it cannot do pings to determine connectivity, so it only uses a single port
     39 // that it thinks will work.
     40 class RawTransport: public Transport, public TransportParser {
     41  public:
     42   RawTransport(talk_base::Thread* signaling_thread,
     43                talk_base::Thread* worker_thread,
     44                PortAllocator* allocator);
     45   virtual ~RawTransport();
     46 
     47   virtual bool ParseCandidates(SignalingProtocol protocol,
     48                                const buzz::XmlElement* elem,
     49                                Candidates* candidates,
     50                                ParseError* error);
     51   virtual bool WriteCandidates(SignalingProtocol protocol,
     52                                const Candidates& candidates,
     53                                XmlElements* candidate_elems,
     54                                WriteError* error);
     55 
     56  protected:
     57   // Creates and destroys raw channels.
     58   virtual TransportChannelImpl* CreateTransportChannel(
     59      const std::string& name, const std::string &content_type);
     60   virtual void DestroyTransportChannel(TransportChannelImpl* channel);
     61 
     62  private:
     63   // Parses the given element, which should describe the address to use for a
     64   // given channel.  This will return false and signal an error if the address
     65   // or channel name is bad.
     66   bool ParseRawAddress(const buzz::XmlElement* elem,
     67                        talk_base::SocketAddress* addr,
     68                        ParseError* error);
     69 
     70   friend class RawTransportChannel;  // For ParseAddress.
     71 
     72   DISALLOW_EVIL_CONSTRUCTORS(RawTransport);
     73 };
     74 
     75 }  // namespace cricket
     76 
     77 #endif  // defined(FEATURE_ENABLE_PSTN)
     78 
     79 #endif  // TALK_P2P_BASE_RAWTRANSPORT_H_
     80