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162 lines
4.5 KiB
162 lines
4.5 KiB
/*
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* $Id$
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*
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* Copyright (C) 2002-2003 Fhg Fokus
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*
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* This file is part of sems, a free SIP media server.
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*
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* sems is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version
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*
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* For a license to use the ser software under conditions
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* other than those described here, or to purchase support for this
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* software, please contact iptel.org by e-mail at the following addresses:
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* info@iptel.org
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*
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* sems is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef SessionTimer_h
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#define SessionTimer_h
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#include "AmApi.h"
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#include "AmSession.h"
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#define MOD_NAME "session_timer"
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/* Session Timer: -ssa */
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class AmTimeoutEvent;
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// these are the timer IDs for session timer
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// Caution: do not use these for other purposes
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#define ID_SESSION_INTERVAL_TIMER -1
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#define ID_SESSION_REFRESH_TIMER -2
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/* Session Timer defaul configuration: */
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#define DEFAULT_ENABLE_SESSION_TIMER 1
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#define SESSION_EXPIRES 120 // seconds
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#define MINIMUM_TIMER 90 //seconds
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/** \brief Factory of the session timer event handler */
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class SessionTimerFactory: public AmSessionEventHandlerFactory
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{
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bool checkSessionExpires(const AmSipRequest& req);
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public:
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SessionTimerFactory(const string& name)
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: AmSessionEventHandlerFactory(name) {}
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int onLoad();
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bool onInvite(const AmSipRequest&);
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AmSessionEventHandler* getHandler(AmSession* s);
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};
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/** \brief config for the session timer */
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class AmSessionTimerConfig
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{
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/** Session Timer: enable? */
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int EnableSessionTimer;
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/** Session Timer: Desired Session-Expires */
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unsigned int SessionExpires;
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/** Session Timer: Minimum Session-Expires */
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unsigned int MinimumTimer;
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public:
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AmSessionTimerConfig();
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~AmSessionTimerConfig();
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/** Session Timer: Enable Session Timer?
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returns 0 on invalid value */
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int setEnableSessionTimer(const string& enable);
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/** Session Timer: Setter for Desired Session-Expires,
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returns 0 on invalid value */
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int setSessionExpires(const string& se);
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/** Session Timer: Setter for Minimum Session-Expires,
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returns 0 on invalid value */
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int setMinimumTimer(const string& minse);
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bool getEnableSessionTimer() { return EnableSessionTimer; }
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unsigned int getSessionExpires() { return SessionExpires; }
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unsigned int getMinimumTimer() { return MinimumTimer; }
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int readFromConfig(AmConfigReader& cfg);
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};
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/** \brief SessionEventHandler for implementing session timer logic for a session */
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class SessionTimer: public AmSessionEventHandler
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{
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AmSessionTimerConfig session_timer_conf;
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AmSession* s;
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enum SessionRefresher {
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refresh_local,
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refresh_remote
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};
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enum SessionRefresherRole {
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UAC,
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UAS
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};
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bool remote_timer_aware;
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unsigned int min_se;
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unsigned int session_interval;
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SessionRefresher session_refresher;
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SessionRefresherRole session_refresher_role;
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void updateTimer(AmSession* s,const AmSipRequest& req);
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void updateTimer(AmSession* s,const AmSipReply& reply);
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void setTimers(AmSession* s);
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void removeTimers(AmSession* s);
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string getReplyHeaders(const AmSipRequest& req);
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string getRequestHeaders(const string& method);
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/* Session Timer: -ssa */
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// @return true if OK
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void onTimeout();
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void onTimeoutEvent(AmTimeoutEvent* timeout_ev);
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public:
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SessionTimer(AmSession*);
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virtual ~SessionTimer(){}
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/* @see AmSessionEventHandler */
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virtual int configure(AmConfigReader& conf);
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virtual bool process(AmEvent*);
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virtual bool onSipRequest(const AmSipRequest&);
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virtual bool onSipReply(const AmSipReply&);
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virtual bool onSendRequest(const string& method,
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const string& content_type,
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const string& body,
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string& hdrs,
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int flags,
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unsigned int cseq);
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virtual bool onSendReply(const AmSipRequest& req,
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unsigned int code,
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const string& reason,
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const string& content_type,
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const string& body,
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string& hdrs,
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int flags);
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};
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#endif
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