opfarenderror.cxx

SIP（Session Initiation Protocol）是由IETF定义

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static const char* const OpFarEndError_cxx_Version =
    "$Id: OpFarEndError.cxx,v 1.18 2002/11/09 02:13:07 derekm Exp $";



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

#include "OpFarEndError.hxx"
#include "UaDevice.hxx"
#include "UaStateMachine.hxx"
#include "UaCallInfo.hxx"



///
using namespace Vocal;


OpFarEndError::OpFarEndError()
{}


OpFarEndError::~OpFarEndError()
{}


///

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


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

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

    Sptr < StatusMsg > msg;
    msg.dynamicCast( sipMsg );
    if ( msg == 0 )
    {
        return 0;
    }

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

    int status;
    int best = 1000;
    bool haveError = false;

    ContactList::iterator iter = call->getContactList()->begin();
    while ( iter != call->getContactList()->end() )
    {
        status = (*iter)->getStatus();
        if ( status < best )
        {
            best = status;
        }
	// If status == 486, this event will be handled by OpFarEndBusy
        if ( status >= 400 && status != 486 )
        {
            haveError = true;
            cpLog( LOG_DEBUG, "Status %d from farend", status );
        }
        iter++;
    }
    if ( best >= 300 && haveError )
    {
        UaDevice::instance()->releaseRtpPort();

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

	// send an ack
	AckMsg ack( *msg );


	Sptr < Contact > origContact = call->findContact( *msg );
	assert( origContact != 0 );
	Sptr< BaseUrl > baseUrl =
	    origContact->getInviteMsg().getRequestLine().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 > reqUrl;
	reqUrl.dynamicCast( baseUrl );
	assert( reqUrl != 0 );

	SipRequestLine reqLine = ack.getRequestLine();
	reqLine.setUrl( reqUrl );
	ack.setRequestLine( reqLine );
	sipEvent->getSipStack()->sendAsync( ack );


        return stateMachine->findState( "StateFastBusy" );
    }
    return 0;
}