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_SESSIONCLIENT_H_ 29 #define TALK_P2P_BASE_SESSIONCLIENT_H_ 30 31 namespace buzz { 32 class XmlElement; 33 } 34 35 namespace cricket { 36 37 struct ParseError; 38 class Session; 39 class SessionDescription; 40 41 class ContentParser { 42 public: 43 virtual bool ParseContent(SignalingProtocol protocol, 44 const buzz::XmlElement* elem, 45 const ContentDescription** content, 46 ParseError* error) = 0; 47 virtual bool WriteContent(SignalingProtocol protocol, 48 const ContentDescription* content, 49 buzz::XmlElement** elem, 50 WriteError* error) = 0; ~ContentParser()51 virtual ~ContentParser() {} 52 }; 53 54 // A SessionClient exists in 1-1 relation with each session. The implementor 55 // of this interface is the one that understands *what* the two sides are 56 // trying to send to one another. The lower-level layers only know how to send 57 // data; they do not know what is being sent. 58 class SessionClient : public ContentParser { 59 public: 60 // Notifies the client of the creation / destruction of sessions of this type. 61 // 62 // IMPORTANT: The SessionClient, in its handling of OnSessionCreate, must 63 // create whatever channels are indicate in the description. This is because 64 // the remote client may already be attempting to connect those channels. If 65 // we do not create our channel right away, then connection may fail or be 66 // delayed. 67 virtual void OnSessionCreate(Session* session, bool received_initiate) = 0; 68 virtual void OnSessionDestroy(Session* session) = 0; 69 70 virtual bool ParseContent(SignalingProtocol protocol, 71 const buzz::XmlElement* elem, 72 const ContentDescription** content, 73 ParseError* error) = 0; 74 virtual bool WriteContent(SignalingProtocol protocol, 75 const ContentDescription* content, 76 buzz::XmlElement** elem, 77 WriteError* error) = 0; 78 protected: 79 // The SessionClient interface explicitly does not include destructor ~SessionClient()80 virtual ~SessionClient() { } 81 }; 82 83 } // namespace cricket 84 85 #endif // TALK_P2P_BASE_SESSIONCLIENT_H_ 86