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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_SESSIONCLIENT_H_
#define _CRICKET_P2P_BASE_SESSIONCLIENT_H_
namespace buzz {
class XmlElement;
}
namespace cricket {
class Session;
class SessionDescription;
// A SessionClient exists in 1-1 relation with each session. The implementor
// of this interface is the one that understands *what* the two sides are
// trying to send to one another. The lower-level layers only know how to send
// data; they do not know what is being sent.
class SessionClient {
public:
// Notifies the client of the creation / destruction of sessions of this type.
//
// IMPORTANT: The SessionClient, in its handling of OnSessionCreate, must
// create whatever channels are indicate in the description. This is because
// the remote client may already be attempting to connect those channels. If
// we do not create our channel right away, then connection may fail or be
// delayed.
virtual void OnSessionCreate(Session* session, bool received_initiate) = 0;
virtual void OnSessionDestroy(Session* session) = 0;
// Provides functions to convert between the XML description of the session
// and the data structures useful to the client. The resulting objects are
// held by the Session for easy access.
virtual const SessionDescription* CreateSessionDescription(
const buzz::XmlElement* element) = 0;
virtual buzz::XmlElement* TranslateSessionDescription(
const SessionDescription* description) = 0;
protected:
// The SessionClient interface explicitly does not include destructor
virtual ~SessionClient() { }
};
} // namespace cricket
#endif // _CRICKET_P2P_BASE_SESSIONCLIENT_H_
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