opack.cxx

SIP（Session Initiation Protocol）是由IETF定义

/* ====================================================================
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 * Copyright (c) 2000 Vovida Networks, Inc.  All rights reserved.
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static const char* const OpAck_cxx_version =
    "$Id: OpAck.cxx,v 1.23 2002/11/09 02:13:07 derekm Exp $";

#include "global.h"
#include "SipEvent.hxx"

#include "OpAck.hxx"
#include "UaDeviceEvent.hxx"
#include "UaDevice.hxx"
#include "UaCallInfo.hxx"
#include "UaConfiguration.hxx"
#ifdef HAS_RSVPLIB
#include "SuaRsvp.hxx"
#endif
#include "SdpHandler.hxx"
#include "RsvpHandler.hxx"


using namespace Vocal;


OpAck::OpAck()
{
}


OpAck::~OpAck()
{
}


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


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

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

    if ( sipMsg->getType() != SIP_ACK )
    {
        return 0;
    }

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

    // Set ACK in call
    Sptr< AckMsg > ack;
    ack.dynamicCast( sipMsg );
    // We can assert here, because we checked for SIP_ACK above.
    assert( ack != 0 );
    call->setAckMsg( ack );

    // Get remote SDP from call info
    Sptr < SipSdp > remoteSdp = call->getRemoteSdp();
    if ( remoteSdp != 0 ) // && remoteSdp->isValidSdp() )
    {
        // TODO For now, do nothing regardless if ACK contains sdp.
        // TODO In the future, if ACK has sdp, we should stop the previous
        // TODO media stream and start a new one with the new sdp.
    }
    else
    {
        // Get remote SDP from message
        Sptr<SipSdp> sdp;
	sdp.dynamicCast ( sipMsg->getContentData(0) );
        if ( sdp == NULL )
        {
            cpLog( LOG_ERR, "No remote SDP in ACK" );
        }
        else // if ( sdp->isValidSdp() )
        {
            remoteSdp = new SipSdp( *sdp );
            call->setRemoteSdp( remoteSdp );
            Sptr < SipSdp > localSdp = call->getLocalSdp();
            if ( localSdp != 0 )
            {
                startAudio( localSdp, remoteSdp );
            }
            else
            {
                cpLog( LOG_ERR, "No local SDP" );
            }
        }
    }

    rsvpAckHandler(call->getLocalSdp(), call->getRemoteSdp());

    return 0;
}


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