opring.cxx

SIP（Session Initiation Protocol）是由IETF定义

/* ====================================================================
 * The Vovida Software License, Version 1.0 
 * 
 * Copyright (c) 2000 Vovida Networks, Inc.  All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
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 * 
 * 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 names "VOCAL", "Vovida Open Communication Application Library",
 *    and "Vovida Open Communication Application Library (VOCAL)" must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written
 *    permission, please contact [e-mail].
 *
 * 4. Products derived from this software may not be called "VOCAL", nor
 *    may "VOCAL" appear in their name, without prior written
 *    permission of Vovida Networks, Inc.
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 * ====================================================================
 * 
 * This software consists of voluntary contributions made by Vovida
 * Networks, Inc. and many individuals on behalf of Vovida Networks,
 * Inc.  For more information on Vovida Networks, Inc., please see
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static const char* const OpRing_cxx_Version =
    "$Id: OpRing.cxx,v 1.47 2002/11/09 02:13:07 derekm Exp $";

#include "global.h"
#include "SipEvent.hxx"
#include "InviteMsg.hxx"
#include "OpRing.hxx"
#include "UaHardwareEvent.hxx"
#include "UaCallInfo.hxx"
#include "UaDevice.hxx"
#include "UaStateMachine.hxx"
#include "UaConfiguration.hxx"
#include "SdpHandler.hxx"
#include "RsvpHandler.hxx"
#include "SystemInfo.hxx"
#include "UaCommandLine.hxx"  
#include "SipVia.hxx"

#ifndef NO_POLICY
#include "PepAgent.hxx"
#endif


using namespace Vocal;


OpRing::OpRing()
{
}


OpRing::~OpRing()
{
}


const char* const
OpRing::name() const
{
    return "OpRing";
}


const Sptr < State >
OpRing::process( const Sptr < SipProxyEvent > event )
{
    cpLog( LOG_DEBUG, "OpRing operation" );

    Sptr < SipEvent > sipEvent;
    sipEvent.dynamicCast( event );
    if ( sipEvent == 0 )
    {
        return 0;
    }
    Sptr < SipMsg > sipMsg = sipEvent->getSipMsg();
    assert( sipMsg != 0 );

    Sptr < InviteMsg > msg;
    msg.dynamicCast( sipMsg );
    if ( msg == 0 )
    {
        cpLog( LOG_DEBUG, "Not an INVITE" );
        return 0;
    }

    Sptr < UaCallInfo > call;
    call.dynamicCast( event->getCallInfo() );
    assert( call != 0 );

    cpLog( LOG_DEBUG, "Ring" );

    // Save INVITE
    call->setRingInvite( new InviteMsg( *msg ) );

    call->setContactMsg(*msg);

    //save route info
    call->setCalleeRoute1List( msg->getrecordrouteList() );
    int numContact = msg->getNumContact();
    if ( numContact )
    {
        SipContact contact = msg->getContact( numContact - 1 );
        Sptr < SipRoute > route = new SipRoute;
        route->setUrl( contact.getUrl() );
        cpLog( LOG_DEBUG, "Remote contact: %s", route->encode().logData() );
        call->addRoute1( route );
    }

    // do this only if configured for voicemail
    // Voice mail front end
    string reason;
    string comment;
    SipViaList viaList = msg->getViaList();
    SipViaList::iterator iter = viaList.begin();
    reason = "Unknown";
    LocalScopeAllocator lo; 
    while ( iter != viaList.end() )
    {
        comment = ((*iter)->getComment()).getData(lo);
        if ( comment.find( "Vovida:" ) != string::npos )
        {
            if ( comment.find( "No Answer" ) != string::npos )
            {
                reason = "No Answer";
            }
            else if ( comment.find( "Busy" ) == string::npos )
            {
                reason = "Busy";
            }
        }
        iter++;
    }

    Sptr < UaHardwareEvent > signal 
	= new UaHardwareEvent( UaDevice::getDeviceQueue() );
    signal->type = HardwareSignalType;
    signal->signalOrRequest.signal = DeviceSignalFwding;

    signal->dataList.push_back( reason );

    Sptr< BaseUrl > baseUrl = msg->getFrom().getUrl();
    assert( baseUrl != 0 );
    if( baseUrl->getType() == TEL_URL )
    {
	cpLog( LOG_ERR, "TEL_URL currently not supported\n" );
	assert( 0 );
    }

    // Assume we have a SIP_URL
    Sptr< SipUrl > sipUrl;
    sipUrl.dynamicCast( baseUrl );
    assert( sipUrl != 0 );

    Data callingNum = sipUrl->getUserValue();
    //Merge: 2 lines from sip/uavm
    callingNum += "@";
    callingNum += sipUrl->getHost();
    
    signal->dataList.push_back( callingNum.getData(lo) );

    SipRequestLine reqLine = msg->getRequestLine();
    baseUrl = reqLine.getUrl();
    assert( baseUrl != 0 );
    if( baseUrl->getType() == TEL_URL )
    {
	cpLog( LOG_ERR, "TEL_URL currently not supported\n" );
	assert( 0 );
    }
    // Assume we have a SIP_URL
    sipUrl.dynamicCast( baseUrl );
    assert( sipUrl != 0 );

    string calledNum = sipUrl->getUserValue().getData(lo);
    signal->dataList.push_back( calledNum );

    UaDevice::getDeviceQueue()->add( signal );

    Sptr<SipSdp> remoteSdp;
    remoteSdp.dynamicCast (msg->getContentData(0));
    bool ringbackTone = false;

    //constructing local SDP

    SipSdp localSdp;
    
    if ( remoteSdp != 0 )
    {
        localSdp = *remoteSdp;

        Data host = theSystem.gethostAddress();

        if(UaConfiguration::instance()->getNATAddress() != "")
        {
            host = UaConfiguration::instance()->getNATAddress();
        }
        
	setStandardSdp(localSdp, 
                       host,
		       UaDevice::instance()->getRtpPort());
    }

    // get the status of the hardware available or not available or
    // available for call waiting only

    HardwareStatusType hdwStatus = UaDevice::instance()->getHardwareStatus();

    // for now support remote ringback only for the first call, not on
    // call waiting

    StatusMsg statusMsg;
    if (UaConfiguration::instance()->getProvideRingback() &&
	hdwStatus == HARDWARE_AVAILABLE &&
	(remoteSdp != 0) )
    {
        ringbackTone = true;
        StatusMsg status( *msg, 183 );

        status.setContentData( &localSdp );
        call->setLocalSdp( new SipSdp( localSdp ) );
        statusMsg = status;
    }
    else
    {
        // If ProvideRingback is off, then we send a 180 WITHOUT SDP
        StatusMsg status( *msg, 180 );
        statusMsg = status;
    }

    if ( remoteSdp != 0 && UaConfiguration::instance()->getProvideRingback() )
    {
        // do policy / rsvp stuff

        call->setRemoteSdp( new SipSdp( *remoteSdp ) );
        call->setLocalSdp( new SipSdp( localSdp ) );

        Sptr < SipSdp > localSdp = call->getLocalSdp();
        Sptr < SipSdp > remoteSdp = call->getRemoteSdp();

#ifndef NO_POLICY
        if (UaConfiguration::instance()->getUsePolicyServer() )
        {
            cpLog(LOG_DEBUG,"Enable QoS handled in Marshal");
        }
#endif

	setupRsvp(*localSdp, *remoteSdp);
    }

    // TODO Call log Show caller information
    if ( !UaCommandLine::instance()->getBoolOpt( "voicemail" ) )
    {
        cout << endl << VTime::strftime("%y/%m/%d %H:%M:%S")
             << " Call " << msg->getFrom().encode().logData() << endl;
    }
    else
    {
        cpLog(LOG_DEBUG, "Call:%s", msg->getFrom().encode().logData());
    }

    Sptr < SipCallId > callId 
        = new SipCallId( sipEvent->getSipCallLeg()->getCallId() );
    if ( hdwStatus == HARDWARE_AVAILABLE )
    {
        // Grab the device for this call
        UaDevice::instance()->setCallId( callId );
    }
    else if ( hdwStatus == HARDWARE_CALLWAITING_ALLOWED )
    {
        //set this call to be on call waiting
        UaDevice::instance()->addCallWaitingId( callId );
    }
    else
    {
        //this case should not happen
        return 0;
    }

    sipEvent->getSipStack()->sendReply( statusMsg );

    //turn on remote ringback if required
    if ( ringbackTone )
    {
	sendRemoteRingback(*remoteSdp);
    }

    Sptr < UaStateMachine > stateMachine;
    stateMachine.dynamicCast( event->getCallInfo()->getFeature() );
    assert( stateMachine != 0 );

    return stateMachine->findState( "StateRinging" );
}


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