sdpbuild.cpp

KphoneSI (kpsi) is a SIP (Session Initiation Protocol) user agent for Linux, with which you can in

#include "sdpbuild.h"
#include "../kphone/sessioncontrol.h"
#include "../kphone/kstatics.h"
SdpBuild::SdpBuild ( SessionControl *sco, SipCall *scall)
{
//	printf(":::::: SdpBuild start\n");
	tempresponsepay=160;
	msg="=";
	call=scall;
	sessionC=sco;
	testPort = "0";
	testHomePort = "0";
	audioPort = "0";
	audioHomePort = "0";
	responsePay = 160;
	videoPrefCodec = " ";
	prefCodec = " ";
	vecID = " ";
	cntParam = 0;
	remoteStart = false;
	if (sessionC) {
		if (sessionC->getSrtpMode() >0) {	
		trsp   = " RTP/SAVP ";
		} else {
		trsp   = " RTP/AVP ";	
		}
	}
	auEnd  = "8000\r\n";
	viEnd  = "90000\r\n";
	end    = "\r\n";
	telend = "101\r\n";
	mIs    = "m=application";
	mAudio = "m=audio ";
	mVideo = "m=video ";
	aRMap  = "a=rtpmap:";
	tEvent = "101 telephone-event";
	ReInvite = false;
	testHost = "0.0.0.0";
	if(sessionC) {
		responsePay = sessionC->getPayload();
	}

}

SdpBuild::~SdpBuild(void)
{
//	printf(":::::: SdpBuild stop\n");
}
QString SdpBuild::prepInviteString(int load,QString audioport,QString port) {


// Evaluate the media type for the SDP-description
        msg = "v=0\r\n"; // Version
        msg += "o=username 0 0 IN ";
	msg +="IP4 " + Sip::getLocalAddress() +end; // Session Id
        msg += "s=The Funky Flow\r\n"; // Session Name
        msg += "c=IN ";
	msg +="IP4 " + Sip::getLocalAddress() +end; // Connection Info
        msg += "t=0 0\r\n"; // Time active

// prepare the Media information

    if (load == (int)SipCall::StandardCall) {
 	msg += mAudio + audioport  + trsp + sessionC->getNZPrefCodecNum(0) + sessionC->getNZPrefCodecNum(1)+
	+ sessionC->getNZPrefCodecNum(2) + sessionC->getNZPrefCodecNum(3) + sessionC->getNZPrefCodecNum(4) + telend; 


	if(sessionC->getPrefCodecNum(0) != "-1") msg += aRMap + sessionC->getPrefCodecNum(0) + " " + sessionC->getPrefCodec(0) + "/" + auEnd;
	if(sessionC->getPrefCodecNum(1) != "-1") msg += aRMap + sessionC->getPrefCodecNum(1) + " " + sessionC->getPrefCodec(1) + "/" + auEnd;
	if(sessionC->getPrefCodecNum(2) != "-1") msg += aRMap + sessionC->getPrefCodecNum(2) + " " + sessionC->getPrefCodec(2) + "/" + auEnd;
	if(sessionC->getPrefCodecNum(3) != "-1") msg += aRMap + sessionC->getPrefCodecNum(3) + " " + sessionC->getPrefCodec(3) + "/" + auEnd;
	if(sessionC->getPrefCodecNum(4) != "-1") msg += aRMap + sessionC->getPrefCodecNum(4) + " " + sessionC->getPrefCodec(4) + "/" + auEnd;		
	msg += aRMap + tEvent + "/" + auEnd;
	
	if(sessionC->getILBC()) {
		if(getResponsePay() == 240) {
			msg += "a=fmtp:97 mode=30\r\n";
		} else {
			msg += "a=fmtp:97 mode=20\r\n";
		}
	}
    } else if( load == (int)SipCall::videoCall) {
     
	msg += mVideo+port+trsp+ sessionC-> getNZVidPrefCodecNum (0)+ " " + sessionC->getNZVidPrefCodecNum (1)+
		" " + sessionC->getNZVidPrefCodecNum (2)+end;	
		
	if(sessionC->getVidPrefCodecNum(0) != "-1") msg += aRMap + sessionC->getVidPrefCodecNum(0) + " " + sessionC->getVidPrefCodec(0) + "/" + viEnd;
	if(sessionC->getVidPrefCodecNum(1) != "-1") msg += aRMap + sessionC->getVidPrefCodecNum(1) + " " + sessionC->getVidPrefCodec(1) + "/" + viEnd;
	if(sessionC->getVidPrefCodecNum(2) != "-1") msg += aRMap + sessionC->getVidPrefCodecNum(2) + " " + sessionC->getVidPrefCodec(2) + "/" + viEnd;
	
    } else if( load == (int)SipCall::auviCall) {
   	
	msg += mAudio + audioport  + trsp + sessionC->getNZPrefCodecNum(0) + sessionC->getNZPrefCodecNum(1)+
	+ sessionC->getNZPrefCodecNum(2) + sessionC->getNZPrefCodecNum(3) + sessionC->getNZPrefCodecNum(4) + telend; 
	if(sessionC->getPrefCodecNum(0) != "-1") msg += aRMap + sessionC->getPrefCodecNum(0) + " " + sessionC->getPrefCodec(0) + "/" + auEnd;
	if(sessionC->getPrefCodecNum(1) != "-1") msg += aRMap + sessionC->getPrefCodecNum(1) + " " + sessionC->getPrefCodec(1) + "/" + auEnd;
	if(sessionC->getPrefCodecNum(2) != "-1") msg += aRMap + sessionC->getPrefCodecNum(2) + " " + sessionC->getPrefCodec(2) + "/" + auEnd;
	if(sessionC->getPrefCodecNum(3) != "-1") msg += aRMap + sessionC->getPrefCodecNum(3) + " " + sessionC->getPrefCodec(3) + "/" + auEnd;
	if(sessionC->getPrefCodecNum(4) != "-1") msg += aRMap + sessionC->getPrefCodecNum(4) + " " + sessionC->getPrefCodec(4) + "/" + auEnd;		
	msg += aRMap + tEvent + "/" + auEnd;
	
	if(sessionC->getILBC()) {
		if(getResponsePay() == 240) {
			msg += "a=fmtp:97 mode=30\r\n";
		} else {
			msg += "a=fmtp:97 mode=20\r\n";
		}
	}
	msg += mVideo+port+trsp+ sessionC-> getNZVidPrefCodecNum (0)+ " " + sessionC->getNZVidPrefCodecNum (1)+
		" " + sessionC->getNZVidPrefCodecNum (2)+end;	
	if(sessionC->getVidPrefCodecNum(0) != "-1") msg += aRMap + sessionC->getVidPrefCodecNum(0) + " " + sessionC->getVidPrefCodec(0) + "/" + viEnd;
	if(sessionC->getVidPrefCodecNum(1) != "-1") msg += aRMap + sessionC->getVidPrefCodecNum(1) + " " + sessionC->getVidPrefCodec(1) + "/" + viEnd;
	if(sessionC->getVidPrefCodecNum(2) != "-1") msg += aRMap + sessionC->getVidPrefCodecNum(2) + " " + sessionC->getVidPrefCodec(2) + "/" + viEnd;
	    
} else {
	
	int posN=sessionC->theVectorId(load).find( '\n' ) + 1;
        vecID = sessionC->theVectorId(load);
	vecID = vecID.remove( 0, posN );
	int trans=sessionC->useL4(load);
	if(trans==useudpL4){
			transp=" udp ";
	} else {
			transp=" RTP/AVP ";
	}
	msg += mIs +  " " +  port  + transp + vecID + end;
	if(call->isRemoteStart()) {
	            msg += "a=fmtp:" + vecID + " rstart" + end;
        }
}
return msg;
}




QString SdpBuild::prepAcceptString(int load,QString audioport,QString port, bool isHold) {

// Evaluate the media type for the SDP-description
	msg = "v=0\r\n"; // Version
        msg += "o=username 0 0 IN ";
	msg+="IP4 ";	// Connection Info
	msg += Sip::getLocalAddress() +end;// Session Id
        
	if(isHold) {
        	msg += "s=Put me on Hold\r\n";  // Session Name
		msg += "c=IN IP4 0.0.0.0\r\n";	// Connection Info
	} else {
		msg += "s=The Funky Flow\r\n"; // Session Name
		msg += "c=IN IP4 " + Sip::getLocalAddress() +end; // Connection Info
	}
        msg += "t=0 0\r\n"; // Time active

// prepare the Media information

if (load == SipCall::StandardCall) {
	
	
	if(getPrefCodecNum() == sessionC->getPrefCodecNum(0) ) {
           msg += mAudio + audioport  + trsp + sessionC->getNZPrefCodecNum(0) + sessionC->getNZPrefCodecNum(1)+
	+ sessionC->getNZPrefCodecNum(2) + sessionC->getNZPrefCodecNum(3) + sessionC->getNZPrefCodecNum(4) + telend;
    
	} else if(getPrefCodecNum() == sessionC->getPrefCodecNum(1) ) {
           msg += mAudio + audioport + trsp + sessionC->getNZPrefCodecNum(1)+ sessionC->getNZPrefCodecNum(0)+
	+ sessionC->getNZPrefCodecNum(2) + sessionC->getNZPrefCodecNum(3) + sessionC->getNZPrefCodecNum(4) + telend;

	} else if(getPrefCodecNum() == sessionC->getPrefCodecNum(2) ){
           msg += mAudio + audioport  + trsp + sessionC->getNZPrefCodecNum(2)+ sessionC->getNZPrefCodecNum(0) +
	+ sessionC->getNZPrefCodecNum(1)+ sessionC->getNZPrefCodecNum(3)+ sessionC->getNZPrefCodecNum(4) + telend;

	} else if(getPrefCodecNum() == sessionC->getPrefCodecNum(3) ){
           msg += mAudio + audioport  + trsp + sessionC->getNZPrefCodecNum(3)+ sessionC->getNZPrefCodecNum(0) +
	sessionC->getNZPrefCodecNum(1)+ sessionC->getNZPrefCodecNum(2)+ sessionC->getNZPrefCodecNum(4) + telend;

	} else if(getPrefCodecNum() == sessionC->getPrefCodecNum(4) )        {
          msg += mAudio + audioport  +trsp+ sessionC-> getNZPrefCodecNum(4)+ " " + sessionC->getNZPrefCodecNum(0) +
	" " + sessionC->getNZPrefCodecNum(1)+ + sessionC->getNZPrefCodecNum(2) + sessionC->getNZPrefCodecNum(3) + telend;
        } else {
	   msg += mAudio + audioport  + trsp + sessionC->getNZPrefCodecNum(0) + sessionC->getNZPrefCodecNum(1)+
	+ sessionC->getNZPrefCodecNum(2) + sessionC->getNZPrefCodecNum(3) + sessionC->getNZPrefCodecNum(4) + telend;
	}
	if(sessionC->getPrefCodecNum(0) != "-1") msg += aRMap + sessionC->getPrefCodecNum(0) + " " + sessionC->getPrefCodec(0) + "/" + auEnd;
	if(sessionC->getPrefCodecNum(1) != "-1") msg += aRMap + sessionC->getPrefCodecNum(1) + " " + sessionC->getPrefCodec(1) + "/" + auEnd;
	if(sessionC->getPrefCodecNum(2) != "-1") msg += aRMap + sessionC->getPrefCodecNum(2) + " " + sessionC->getPrefCodec(2) + "/" + auEnd;
	if(sessionC->getPrefCodecNum(3) != "-1") msg += aRMap + sessionC->getPrefCodecNum(3) + " " + sessionC->getPrefCodec(3) + "/" + auEnd;
	if(sessionC->getPrefCodecNum(4) != "-1") msg += aRMap + sessionC->getPrefCodecNum(4) + " " + sessionC->getPrefCodec(4) + "/" + auEnd;
	msg += aRMap + tEvent + "/" + auEnd;
	
	if(sessionC->getILBC()) {
		if(getResponsePay() == 240) {
			msg += "a=fmtp:97 mode=30\r\n";
		} else {
			msg += "a=fmtp:97 mode=20\r\n";
		}
	}

} else if( load == SipCall::videoCall) {
      	if (sessionC->getVidPrefCodec(0) == getVidPrefCodec()) {
        	msg += mVideo+port+trsp+ sessionC-> getNZVidPrefCodecNum (0)+ " " + sessionC->getNZVidPrefCodecNum (1)+
		" " + sessionC->getVidPrefCodecNum (2)+end;
        } else if (sessionC->getVidPrefCodec(1)== getVidPrefCodec() ) {
		msg += mVideo+port+trsp+ sessionC-> getNZVidPrefCodecNum (1)+ " " + sessionC->getNZVidPrefCodecNum (0)+
		" " + sessionC->getVidPrefCodecNum (2)+end;
	} else         {
        	msg += mVideo+port+trsp+ sessionC-> getNZVidPrefCodecNum (2)+ " " + sessionC->getNZVidPrefCodecNum (0)+
		" " + sessionC->getNZVidPrefCodecNum (1)+end;
        }
	if(sessionC->getVidPrefCodecNum(0) != "-1") msg += aRMap + sessionC->getVidPrefCodecNum(0) + " " + sessionC->getVidPrefCodec(0) + "/" + viEnd;
	if(sessionC->getVidPrefCodecNum(1) != "-1") msg += aRMap + sessionC->getVidPrefCodecNum(1) + " " + sessionC->getVidPrefCodec(1) + "/" + viEnd;
	if(sessionC->getVidPrefCodecNum(2) != "-1") msg += aRMap + sessionC->getVidPrefCodecNum(2) + " " + sessionC->getVidPrefCodec(2) + "/" + viEnd;

} else if( load == SipCall::auviCall) {


 	if(getPrefCodec().contains(sessionC->getPrefCodec(0))){
           msg += mAudio + audioport  + trsp + sessionC->getNZPrefCodecNum(0) + sessionC->getNZPrefCodecNum(1)+
	" " + sessionC->getNZPrefCodecNum(2) + sessionC->getNZPrefCodecNum(3) + sessionC->getNZPrefCodecNum(4) + telend;

	} else if(getPrefCodec().contains(sessionC->getPrefCodec(1))){
           msg += mAudio + audioport + trsp + sessionC->getNZPrefCodecNum(1)+ sessionC->getNZPrefCodecNum(0)+
	" " + sessionC->getNZPrefCodecNum(2) + sessionC->getNZPrefCodecNum(3) + sessionC->getNZPrefCodecNum(4) + telend;

	} else if(getPrefCodec().contains(sessionC->getPrefCodec(2))){
           msg += mAudio + audioport  + trsp + sessionC->getNZPrefCodecNum(2)+ sessionC->getNZPrefCodecNum(0) +
	+ sessionC->getNZPrefCodecNum(1)+ sessionC->getNZPrefCodecNum(3)+ sessionC->getNZPrefCodecNum(4) + telend;

	} else if(getPrefCodec().contains(sessionC->getPrefCodec(3))){
           msg += mAudio + audioport  + trsp + sessionC->getNZPrefCodecNum(3)+ sessionC->getNZPrefCodecNum(0) +
	sessionC->getNZPrefCodecNum(1)+ sessionC->getNZPrefCodecNum(2)+ sessionC->getNZPrefCodecNum(4) + telend;

	} else         {
          msg += mAudio + audioport  +trsp+ sessionC-> getNZPrefCodecNum(4)+ " " + sessionC->getNZPrefCodecNum(0) +
	" " + sessionC->getNZPrefCodecNum(1)+ + sessionC->getNZPrefCodecNum(2) + sessionC->getNZPrefCodecNum(3) + telend;
        }
	if(sessionC->getPrefCodecNum(0) != "-1") msg += aRMap + sessionC->getPrefCodecNum(0) + " " + sessionC->getPrefCodec(0) + "/" + auEnd;
	if(sessionC->getPrefCodecNum(1) != "-1") msg += aRMap + sessionC->getPrefCodecNum(1) + " " + sessionC->getPrefCodec(1) + "/" + auEnd;
	if(sessionC->getPrefCodecNum(2) != "-1") msg += aRMap + sessionC->getPrefCodecNum(2) + " " + sessionC->getPrefCodec(2) + "/" + auEnd;
	if(sessionC->getPrefCodecNum(3) != "-1") msg += aRMap + sessionC->getPrefCodecNum(3) + " " + sessionC->getPrefCodec(3) + "/" + auEnd;
	if(sessionC->getPrefCodecNum(4) != "-1") msg += aRMap + sessionC->getPrefCodecNum(4) + " " + sessionC->getPrefCodec(4) + "/" + auEnd;
	msg += aRMap + tEvent + "/" + auEnd;
        if (sessionC->getVidPrefCodec(0) == getVidPrefCodec()) {
        	msg += mVideo+port+trsp+ sessionC-> getNZVidPrefCodecNum (0)+ " " + sessionC->getNZVidPrefCodecNum (1)+
		" " + sessionC->getVidPrefCodecNum (2) + end;
        } else if (sessionC->getVidPrefCodec(1)== getVidPrefCodec() ) {
		msg += mVideo+port+trsp+ sessionC-> getNZVidPrefCodecNum (1)+ " " + sessionC->getNZVidPrefCodecNum (0)+
		" " + sessionC->getVidPrefCodecNum (2)+ "/" + end;
	} else         {
        	msg += mVideo+port+trsp+ sessionC-> getNZVidPrefCodecNum (2)+ " " + sessionC->getNZVidPrefCodecNum (0)+
		" " + sessionC->getNZVidPrefCodecNum (1) + end;
        }
	
	if(sessionC->getILBC()) {
		if(getResponsePay() == 240) {
			msg += "a=fmtp:97 mode=30\r\n";
		} else {
			msg += "a=fmtp:97 mode=20\r\n";
		}
	}
	
	if(sessionC->getVidPrefCodecNum(0) != "-1") msg += aRMap + sessionC->getVidPrefCodecNum(0) + " " + sessionC->getVidPrefCodec(0) + "/" + viEnd;
	if(sessionC->getVidPrefCodecNum(1) != "-1") msg += aRMap + sessionC->getVidPrefCodecNum(1) + " " + sessionC->getVidPrefCodec(1) + "/" + viEnd;
	if(sessionC->getVidPrefCodecNum(2) != "-1") msg += aRMap + sessionC->getVidPrefCodecNum(2) + " " + sessionC->getVidPrefCodec(2) + "/" + viEnd;
} else {
	int posN=sessionC->theVectorId(load).find( '\n' ) + 1;
        vecID = sessionC->theVectorId(load);
	vecID = vecID.remove( 0, posN );
	int trans=sessionC->useL4(load);
	if(trans==useudpL4){
			transp=" udp ";
	} else {
			transp=" RTP/AVP ";
	}

	msg += mIs + " " +  port  + transp + vecID + end;

	if(call->isRemoteStart()) {
            msg += "a=fmtp:" + vecID + " rstart" + end;
        }
 }

return msg;
}
int SdpBuild::checkVectorId(int stat, QString incomingId) {
	int b = SipCall::extCall1-1;
	int i = 1;
	for(i = 1 ; i < 5; i++){
	
	    if(incomingId == sessionC->theVectorId(b+i)) return b+i;
	}
	return 0;
}	


int SdpBuild::checkCodec( bool testReInvite, SipCallMember *member, bool forceHold , bool *srtpErr)
{
	cntParam=0;
	ReInvite=testReInvite;
        int status = (int)SipCall::GarKeinCall;
	int isRtpMap=0;
	int i=0, j=0;
	QString transT;
        bool evaluateV=false, evaluateA=false, evaluateAV=false;
        QString mstr = member->getSessionDescription();
        QString ipaddress;
        QString curline;
        QString portstr;
        QString codecstr;
        QString codecstr1;
        QString codecstr2;
        int receivedAudioMediaNumber = 0, receivedVideoMediaNumber = 0;
        QString dp=":";
	QString sec;
        mstr += '\n';                        // Guarentee termination
        if( mstr.left( mstr.find( '\n' ) ) != "v=0" ) {
	return doReturn (status);
        }
        mstr.remove( 0, mstr.find( '\n' ) + 1 );
        while( mstr.length() > 2 ) {
                curline = mstr.left( mstr.find( '\n' ) );
                mstr.remove( 0, mstr.find( '\n' ) + 1 );
	        if( curline.left( curline.find( '=' ) ) == "c" ) {
            		if( curline.contains("IP4") ) {
		    	    ipaddress = curline.mid( curline.find( "IP4" ) + 4 ).stripWhiteSpace();
			}
		}
                
		if( curline.contains("m=audio")) {
			//printf("SdpBuild::checkCodec %s\n",curline.latin1());
			if(ipaddress.contains("0.0.0.0") || ipaddress.contains("::0") || forceHold){
                        status = (int) SipCall::putMeOnHold;
			setExtHost(ipaddress);
			return  doReturn (status);
			} else {
				if(evaluateV==true) {
					evaluateAV=true;
					status = (int)SipCall::auviCall;
				} else {
					status = (int)SipCall::StandardCall;
					evaluateA=true;
				}
				if ( ( curline.contains("RTP/SAVP") && (sessionC->getSrtpMode() != 1) )|| ( curline.contains("RTP/AVP") && (sessionC->getSrtpMode() != 0) ) ) {
				    printf (" SdpBuild::checkCodec srtp error\n");
				    *srtpErr = true;
				}
				setAudioPort(curline.section(' ',1,1));
				setExtHost(ipaddress);
				int i = (-1);
				do {
					i++;
					acc[i] = curline.section(' ', i+3, i+3);
					
				} while (acc[i].length() != 0);
				receivedAudioMediaNumber = i;
					
			}
                }
                if( curline.contains("m=video")) {
			if(ipaddress.contains("0.0.0.0") || forceHold){