28e2075280
trunk/talk git-svn-id: http://webrtc.googlecode.com/svn/trunk@4318 4adac7df-926f-26a2-2b94-8c16560cd09d
96 lines
4.0 KiB
C++
96 lines
4.0 KiB
C++
/*
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* libjingle
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* Copyright 2004--2005, Google Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef TALK_P2P_BASE_SESSIONCLIENT_H_
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#define TALK_P2P_BASE_SESSIONCLIENT_H_
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#include "talk/p2p/base/constants.h"
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namespace buzz {
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class XmlElement;
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}
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namespace cricket {
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struct ParseError;
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class Session;
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class ContentDescription;
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class ContentParser {
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public:
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virtual bool ParseContent(SignalingProtocol protocol,
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const buzz::XmlElement* elem,
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ContentDescription** content,
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ParseError* error) = 0;
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// If not IsWriteable, then a given content should be "skipped" when
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// writing in the given protocol, as if it didn't exist. We assume
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// most things are writeable. We do this to avoid strange cases
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// like data contents in Gingle, which aren't writable.
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virtual bool IsWritable(SignalingProtocol protocol,
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const ContentDescription* content) {
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return true;
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}
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virtual bool WriteContent(SignalingProtocol protocol,
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const ContentDescription* content,
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buzz::XmlElement** elem,
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WriteError* error) = 0;
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virtual ~ContentParser() {}
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};
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// A SessionClient exists in 1-1 relation with each session. The implementor
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// of this interface is the one that understands *what* the two sides are
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// trying to send to one another. The lower-level layers only know how to send
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// data; they do not know what is being sent.
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class SessionClient : public ContentParser {
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public:
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// Notifies the client of the creation / destruction of sessions of this type.
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//
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// IMPORTANT: The SessionClient, in its handling of OnSessionCreate, must
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// create whatever channels are indicate in the description. This is because
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// the remote client may already be attempting to connect those channels. If
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// we do not create our channel right away, then connection may fail or be
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// delayed.
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virtual void OnSessionCreate(Session* session, bool received_initiate) = 0;
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virtual void OnSessionDestroy(Session* session) = 0;
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virtual bool ParseContent(SignalingProtocol protocol,
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const buzz::XmlElement* elem,
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ContentDescription** content,
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ParseError* error) = 0;
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virtual bool WriteContent(SignalingProtocol protocol,
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const ContentDescription* content,
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buzz::XmlElement** elem,
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WriteError* error) = 0;
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protected:
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// The SessionClient interface explicitly does not include destructor
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virtual ~SessionClient() { }
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};
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} // namespace cricket
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#endif // TALK_P2P_BASE_SESSIONCLIENT_H_
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