simplereceivingexample.cxx

SIP（Session Initiation Protocol）是由IETF定义

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static const char* const SimpleReceivingExample_cxx_Version =
    "$Id: SimpleReceivingExample.cxx,v 1.2.24.1 2003/02/07 19:21:57 sprajpat Exp $";

#include "VovidaSipStack.hxx"
#include "InviteMsg.hxx"
#include "SipSdp.hxx"
#include <iostream>

using namespace Vocal;
using namespace Vocal::SDP;


int main(int argc, char** argv)
{
    // here is the SIP stack for this message.  the argument is the
    // SIP port for this program.

    Sptr<SipTransceiverFilter> sipStack = new SipTransceiverFilter(argv[0], 5060);


    // get the message -- this comes in a queue of messages
    Sptr<SipMsgQueue> queue = sipStack->receive();

    Sptr<SipMsg> msg = queue->back();

    // Convert the object to one of class SipInvite, so that we can
    // access the headers for it particularly

    Sptr<InviteMsg> invite;
    invite.dynamicCast(msg);

    if(invite != 0)
    {
	// if invite != 0 (e.g. if invite is pointing to a message)
	// then it is a SIP INVITE.  Examine the From: field

	SipFrom from = invite->getFrom();

	// print the Display Name of the From:
	cout << "Display Name: " << from.getDisplayName() << endl;

	// now, get the From: URL .

	Sptr<BaseUrl> url = from.getUrl();

	// verify that this URL is a SIP URL

	if(url->getType() == SIP_URL)
	{
	    // convert to a Sptr<SipUrl> so we can access SIP-specific fields
	    Sptr<SipUrl> sipUrl;
	    sipUrl.dynamicCast(url);
	    // this assertion should always be true
	    assert(sipUrl != 0);

	    cout << "Domain name: " << sipUrl->getHost() << endl;
	}

	// now, retrieve the RTP port from the SDP body of the message

	Sptr<SipSdp> sdp;
	sdp.dynamicCast(invite->getContentData(0));
	if(sdp != 0)
	{
	    int port = sdp->getRtpPort();
	    cout << "port: " << port << endl;
	}

	// now, construct a 200 OK response .  the first argument here
	// is the message to respond to, the second is the response type.

	StatusMsg status(*invite, 200);

	// you can (and probably should) add an SDP body containing
	// the information for your RTP streams here.  However, we
	// will send the reply without filling out the status message

	sipStack->sendReply(status);
    }
    

    sipStack = 0;
    return 0;
}