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/*
* libjingle
* Copyright 2004--2008, 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 __TUNNELSESSIONCLIENT_H__
#define __TUNNELSESSIONCLIENT_H__
#include <vector>
#include "talk/p2p/base/constants.h"
#include "talk/p2p/base/pseudotcp.h"
#include "talk/p2p/base/session.h"
#include "talk/p2p/base/sessionclient.h"
#include "talk/p2p/base/sessiondescription.h"
#include "talk/p2p/base/sessionmanager.h"
#include "talk/xmllite/qname.h"
#include "talk/xmpp/constants.h"
#include "webrtc/base/criticalsection.h"
#include "webrtc/base/stream.h"
namespace cricket {
class TunnelSession;
class TunnelStream;
enum TunnelSessionRole { INITIATOR, RESPONDER };
///////////////////////////////////////////////////////////////////////////////
// TunnelSessionClient
///////////////////////////////////////////////////////////////////////////////
// Base class is still abstract
class TunnelSessionClientBase
: public SessionClient, public rtc::MessageHandler {
public:
TunnelSessionClientBase(const buzz::Jid& jid, SessionManager* manager,
const std::string &ns);
virtual ~TunnelSessionClientBase();
const buzz::Jid& jid() const { return jid_; }
SessionManager* session_manager() const { return session_manager_; }
void OnSessionCreate(Session* session, bool received);
void OnSessionDestroy(Session* session);
// This can be called on any thread. The stream interface is
// thread-safe, but notifications must be registered on the creating
// thread.
rtc::StreamInterface* CreateTunnel(const buzz::Jid& to,
const std::string& description);
rtc::StreamInterface* AcceptTunnel(Session* session);
void DeclineTunnel(Session* session);
// Invoked on an incoming tunnel
virtual void OnIncomingTunnel(const buzz::Jid &jid, Session *session) = 0;
// Invoked on an outgoing session request
virtual SessionDescription* CreateOffer(
const buzz::Jid &jid, const std::string &description) = 0;
// Invoked on a session request accept to create
// the local-side session description
virtual SessionDescription* CreateAnswer(
const SessionDescription* offer) = 0;
protected:
void OnMessage(rtc::Message* pmsg);
// helper method to instantiate TunnelSession. By overriding this,
// subclasses of TunnelSessionClient are able to instantiate
// subclasses of TunnelSession instead.
virtual TunnelSession* MakeTunnelSession(Session* session,
rtc::Thread* stream_thread,
TunnelSessionRole role);
buzz::Jid jid_;
SessionManager* session_manager_;
std::vector<TunnelSession*> sessions_;
std::string namespace_;
bool shutdown_;
};
class TunnelSessionClient
: public TunnelSessionClientBase, public sigslot::has_slots<> {
public:
TunnelSessionClient(const buzz::Jid& jid, SessionManager* manager);
TunnelSessionClient(const buzz::Jid& jid, SessionManager* manager,
const std::string &ns);
virtual ~TunnelSessionClient();
virtual bool ParseContent(SignalingProtocol protocol,
const buzz::XmlElement* elem,
ContentDescription** content,
ParseError* error);
virtual bool WriteContent(SignalingProtocol protocol,
const ContentDescription* content,
buzz::XmlElement** elem,
WriteError* error);
// Signal arguments are this, initiator, description, session
sigslot::signal4<TunnelSessionClient*, buzz::Jid, std::string, Session*>
SignalIncomingTunnel;
virtual void OnIncomingTunnel(const buzz::Jid &jid,
Session *session);
virtual SessionDescription* CreateOffer(
const buzz::Jid &jid, const std::string &description);
virtual SessionDescription* CreateAnswer(
const SessionDescription* offer);
};
///////////////////////////////////////////////////////////////////////////////
// TunnelSession
// Note: The lifetime of TunnelSession is complicated. It needs to survive
// until the following three conditions are true:
// 1) TunnelStream has called Close (tracked via non-null stream_)
// 2) PseudoTcp has completed (tracked via non-null tcp_)
// 3) Session has been destroyed (tracked via non-null session_)
// This is accomplished by calling CheckDestroy after these indicators change.
///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
// TunnelStream
// Note: Because TunnelStream provides a stream interface, its lifetime is
// controlled by the owner of the stream pointer. As a result, we must support
// both the TunnelSession disappearing before TunnelStream, and vice versa.
///////////////////////////////////////////////////////////////////////////////
class PseudoTcpChannel;
class TunnelSession : public sigslot::has_slots<> {
public:
// Signalling thread methods
TunnelSession(TunnelSessionClientBase* client, Session* session,
rtc::Thread* stream_thread);
virtual rtc::StreamInterface* GetStream();
bool HasSession(Session* session);
Session* ReleaseSession(bool channel_exists);
protected:
virtual ~TunnelSession();
virtual void OnSessionState(BaseSession* session, BaseSession::State state);
virtual void OnInitiate();
virtual void OnAccept();
virtual void OnTerminate();
virtual void OnChannelClosed(PseudoTcpChannel* channel);
TunnelSessionClientBase* client_;
Session* session_;
PseudoTcpChannel* channel_;
};
///////////////////////////////////////////////////////////////////////////////
} // namespace cricket
#endif // __TUNNELSESSIONCLIENT_H__
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