/**
* Java RTP Library (jlibrtp)
* Copyright (C) 2006 Arne Kepp
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package jlibrtp;
import java.net.InetSocketAddress;
/**
* RTCP packets for Source Descriptions
*
* @author Arne Kepp
*/
public class RtcpPktSDES extends RtcpPkt {
/** Whether the RTP Session object should be inclduded */
boolean reportSelf = true;
/** The parent RTP Session object, holds participant database */
RTPSession rtpSession = null;
/** The participants to create SDES packets for */
protected Participant[] participants = null;
/**
* Constructor to create a new SDES packet
*
* TODO:
* Currently the added participants are not actually encoded
* because the library lacks some support for acting as mixer or
* relay in other areas.
*
* @param reportThisSession include information from RTPSession as a participant
* @param rtpSession the session itself
* @param additionalParticipants additional participants to include
*/
protected RtcpPktSDES(boolean reportThisSession, RTPSession rtpSession, Participant[] additionalParticipants) {
super.packetType = 202;
// Fetch all the right stuff from the database
reportSelf = reportThisSession;
participants = additionalParticipants;
this.rtpSession = rtpSession;
}
/**
* Constructor that parses a received packet
*
* @param aRawPkt the byte[] containing the packet
* @param start where in the byte[] this packet starts
* @param socket the address from which the packet was received
* @param partDb the participant database
*/
protected RtcpPktSDES(byte[] aRawPkt,int start, InetSocketAddress socket, ParticipantDatabase partDb) {
if(RTPSession.rtcpDebugLevel > 8) {
System.out.println(" -> RtcpPktSDES(byte[], ParticipantDabase)");
}
rawPkt = aRawPkt;
if(! super.parseHeaders(start) || packetType != 202 ) {
if(RTPSession.rtpDebugLevel > 2) {
System.out.println(" <-> RtcpPktSDES.parseHeaders() etc. problem");
}
super.problem = -202;
} else {
//System.out.println(" DECODE SIZE: " + super.length + " itemcount " + itemCount );
int curPos = 4 + start;
int curLength;
int curType;
long ssrc;
boolean endReached = false;
boolean newPart;
this.participants = new Participant[itemCount];
// Loop over SSRC SDES chunks
for(int i=0; i< itemCount; i++) {
ssrc = StaticProcs.bytesToUIntLong(aRawPkt, curPos);
Participant part = partDb.getParticipant(ssrc);
if(part == null) {
if(RTPSession.rtcpDebugLevel > 1) {
System.out.println("RtcpPktSDES(byte[], ParticipantDabase) adding new participant, ssrc:"+ssrc+" "+socket);
}
part = new Participant(socket, socket , ssrc);
newPart = true;
} else {
newPart = false;
}
curPos += 4;
//System.out.println("PRE endReached " + endReached + " curPos: " + curPos + " length:" + this.length + (!endReached && (curPos/4) < this.length));
while(!endReached && (curPos/4) <= this.length) {
//System.out.println("endReached " + endReached + " curPos: " + curPos + " length:" + this.length);
curType = (int) aRawPkt[curPos];
if(curType == 0) {
curPos += 4 - (curPos % 4);
endReached = true;
} else {
curLength = (int) aRawPkt[curPos + 1];
//System.out.println("curPos:"+curPos+" curType:"+curType+" curLength:"+curLength+" read from:"+(curPos + 1));
if(curLength > 0) {
byte[] item = new byte[curLength];
//System.out.println("curPos:"+curPos+" arawPkt.length:"+aRawPkt.length+" curLength:"+curLength);
System.arraycopy(aRawPkt, curPos + 2, item, 0, curLength);
switch(curType) {
case 1: part.cname = new String(item); break;
case 2: part.name = new String(item); break;
case 3: part.email = new String(item); break;
case 4: part.phone = new String(item); break;
case 5: part.loc = new String(item); break;
case 6: part.tool = new String(item); break;
case 7: part.note = new String(item); break;
case 8: part.priv = new String(item); break;
}
//System.out.println("TYPE " + curType + " value:" + new String(item) );
} else {
switch(curType) {
case 1: part.cname = null; break;
case 2: part.name = null; break;
case 3: part.email = null; break;
case 4: part.phone = null; break;
case 5: part.loc = null; break;
case 6: part.tool = null; break;
case 7: part.note = null; break;
case 8: part.priv = null; break;
}
}
curPos = curPos + curLength + 2;
}
}
// Save the participant
this.participants[i] = part;
if(newPart)
partDb.addParticipant(2,part);
//System.out.println("HEPPPPPP " + participants[i].cname );
}
}
if(RTPSession.rtcpDebugLevel > 8) {
System.out.println(" <- RtcpPktSDES()");
}
}
/**
* Encode the packet into a byte[], saved in .rawPkt
*
* CompRtcpPkt will call this automatically
*/
protected void encode() {
byte[] temp = new byte[1450];
byte[] someBytes = StaticProcs.uIntLongToByteWord(this.rtpSession.ssrc);
System.arraycopy(someBytes, 0, temp, 4, 4);
int pos = 8;
String tmpString = null;
for(int i=1; i<9;i++) {
switch(i) {
case 1: tmpString = this.rtpSession.cname; break;
case 2: tmpString = this.rtpSession.name; break;
case 3: tmpString = this.rtpSession.email; break;
case 4: tmpString = this.rtpSession.phone; break;
case 5: tmpString = this.rtpSession.loc; break;
case 6: tmpString = this.rtpSession.tool; break;
case 7: tmpString = this.rtpSession.note; break;
case 8: tmpString = this.rtpSession.priv; break;
}
if(tmpString != null) {
someBytes = tmpString.getBytes();
temp[pos] = (byte) i;
temp[pos+1] = (byte) someBytes.length;
System.arraycopy(someBytes, 0, temp, pos + 2, someBytes.length);
//System.out.println("i: "+i+" pos:"+pos+" someBytes.length:"+someBytes.length);
pos = pos + someBytes.length + 2;
//if(i == 1 ) {
// System.out.println("trueeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee" + tmpString);
//}
}
}
int leftover = pos % 4;
if(leftover == 1) {
temp[pos] = (byte) 0;
temp[pos + 1] = (byte) 1;
pos += 3;
} else if(leftover == 2) {
temp[pos] = (byte) 0;
temp[pos + 1] = (byte) 0;
pos += 2;
} else if(leftover == 3) {
temp[pos] = (byte) 0;
temp[pos + 1] = (byte) 3;
pos += 5;
}
// TODO Here we ought to loop over participants, if we're doing SDES for other participants.
super.rawPkt = new byte[pos];
itemCount = 1;
//This looks wrong, but appears to be fine..
System.arraycopy(temp, 0, super.rawPkt, 0, pos);
writeHeaders();
}
/**
* Debug purposes only
*/
public void debugPrint() {
System.out.println("RtcpPktSDES.debugPrint() ");
if(participants != null) {
for(int i= 0; i<participants.length; i++) {
Participant part = participants[i];
System.out.println(" part.ssrc: " + part.ssrc + " part.cname: " + part.cname + " part.loc: " + part.loc);
}
} else {
System.out.println(" nothing to report (only valid for received packets)");
}
}
}