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_TRANSPORTCHANNELIMPL_H_ 29 #define TALK_P2P_BASE_TRANSPORTCHANNELIMPL_H_ 30 31 #include <string> 32 #include "talk/p2p/base/transportchannel.h" 33 34 namespace buzz { class XmlElement; } 35 36 namespace cricket { 37 38 class Transport; 39 class Candidate; 40 41 // Base class for real implementations of TransportChannel. This includes some 42 // methods called only by Transport, which do not need to be exposed to the 43 // client. 44 class TransportChannelImpl : public TransportChannel { 45 public: TransportChannelImpl(const std::string & name,const std::string & content_type)46 TransportChannelImpl(const std::string& name, const std::string& content_type) 47 : TransportChannel(name, content_type) {} 48 49 // Returns the transport that created this channel. 50 virtual Transport* GetTransport() = 0; 51 52 // Begins the process of attempting to make a connection to the other client. 53 virtual void Connect() = 0; 54 55 // Resets this channel back to the initial state (i.e., not connecting). 56 virtual void Reset() = 0; 57 58 // Allows an individual channel to request signaling and be notified when it 59 // is ready. This is useful if the individual named channels have need to 60 // send their own transport-info stanzas. 61 sigslot::signal0<> SignalRequestSignaling; 62 virtual void OnSignalingReady() = 0; 63 64 // Handles sending and receiving of candidates. The Transport 65 // receives the candidates and may forward them to the relevant 66 // channel. 67 // 68 // Note: Since candidates are delivered asynchronously to the 69 // channel, they cannot return an error if the message is invalid. 70 // It is assumed that the Transport will have checked validity 71 // before forwarding. 72 sigslot::signal2<TransportChannelImpl*, 73 const Candidate&> SignalCandidateReady; 74 virtual void OnCandidate(const Candidate& candidate) = 0; 75 private: 76 DISALLOW_EVIL_CONSTRUCTORS(TransportChannelImpl); 77 }; 78 79 } // namespace cricket 80 81 #endif // TALK_P2P_BASE_TRANSPORTCHANNELIMPL_H_ 82