/**
* Adds a specific (RTP) SSRC to the list of SSRCs seen/received on this <tt>Channel</tt>.
* Invoked by the Jitsi Videobridge server, not its clients.
*
* @param ssrc the (RTP) SSRC to be added to the list of SSRCs seen/received on this
* <tt>Channel</tt>
* @return <tt>true</tt> if the list of SSRCs seen/received on this <tt>Channel</tt> has been
* modified as part of the method call; otherwise, <tt>false</tt>
*/
public synchronized boolean addSSRC(int ssrc) {
// contains
for (int i = 0; i < ssrcs.length; i++) if (ssrcs[i] == ssrc) return false;
// add
int[] newSSRCs = new int[ssrcs.length + 1];
System.arraycopy(ssrcs, 0, newSSRCs, 0, ssrcs.length);
newSSRCs[ssrcs.length] = ssrc;
ssrcs = newSSRCs;
return true;
}
/**
* Removes a specific (RTP) SSRC from the list of SSRCs seen/received on this <tt>Channel</tt>.
* Invoked by the Jitsi Videobridge server, not its clients.
*
* @param ssrc the (RTP) SSRC to be removed from the list of SSRCs seen/received on this
* <tt>Channel</tt>
* @return <tt>true</tt> if the list of SSRCs seen/received on this <tt>Channel</tt> has been
* modified as part of the method call; otherwise, <tt>false</tt>
*/
public synchronized boolean removeSSRC(int ssrc) {
if (ssrcs.length == 1) {
if (ssrcs[0] == ssrc) {
ssrcs = NO_SSRCS;
return true;
} else return false;
} else {
for (int i = 0; i < ssrcs.length; i++) {
if (ssrcs[i] == ssrc) {
int[] newSSRCs = new int[ssrcs.length - 1];
if (i != 0) System.arraycopy(ssrcs, 0, newSSRCs, 0, i);
if (i != newSSRCs.length) {
System.arraycopy(ssrcs, i + 1, newSSRCs, i, newSSRCs.length - i);
}
ssrcs = newSSRCs;
return true;
}
}
return false;
}
}
private void runOnDtlsTransport(StreamConnector connector) throws IOException {
DtlsControlImpl dtlsControl = (DtlsControlImpl) getTransportManager().getDtlsControl(this);
DtlsTransformEngine engine = dtlsControl.getTransformEngine();
final DtlsPacketTransformer transformer = (DtlsPacketTransformer) engine.getRTPTransformer();
byte[] receiveBuffer = new byte[SCTP_BUFFER_SIZE];
if (LOG_SCTP_PACKETS) {
System.setProperty(
ConfigurationService.PNAME_SC_HOME_DIR_LOCATION, System.getProperty("java.io.tmpdir"));
System.setProperty(
ConfigurationService.PNAME_SC_HOME_DIR_NAME, SctpConnection.class.getName());
}
synchronized (this) {
// FIXME local SCTP port is hardcoded in bridge offer SDP (Jitsi
// Meet)
sctpSocket = Sctp.createSocket(5000);
assocIsUp = false;
acceptedIncomingConnection = false;
}
// Implement output network link for SCTP stack on DTLS transport
sctpSocket.setLink(
new NetworkLink() {
@Override
public void onConnOut(SctpSocket s, byte[] packet) throws IOException {
if (LOG_SCTP_PACKETS) {
LibJitsi.getPacketLoggingService()
.logPacket(
PacketLoggingService.ProtocolName.ICE4J,
new byte[] {0, 0, 0, (byte) debugId},
5000,
new byte[] {0, 0, 0, (byte) (debugId + 1)},
remoteSctpPort,
PacketLoggingService.TransportName.UDP,
true,
packet);
}
// Send through DTLS transport
transformer.sendApplicationData(packet, 0, packet.length);
}
});
if (logger.isDebugEnabled()) {
logger.debug("Connecting SCTP to port: " + remoteSctpPort + " to " + getEndpoint().getID());
}
sctpSocket.setNotificationListener(this);
sctpSocket.listen();
// FIXME manage threads
threadPool.execute(
new Runnable() {
@Override
public void run() {
SctpSocket sctpSocket = null;
try {
// sctpSocket is set to null on close
sctpSocket = SctpConnection.this.sctpSocket;
while (sctpSocket != null) {
if (sctpSocket.accept()) {
acceptedIncomingConnection = true;
break;
}
Thread.sleep(100);
sctpSocket = SctpConnection.this.sctpSocket;
}
if (isReady()) {
notifySctpConnectionReady();
}
} catch (Exception e) {
logger.error("Error accepting SCTP connection", e);
}
if (sctpSocket == null && logger.isInfoEnabled()) {
logger.info(
"SctpConnection " + getID() + " closed" + " before SctpSocket accept()-ed.");
}
}
});
// Notify that from now on SCTP connection is considered functional
sctpSocket.setDataCallback(this);
// Setup iceSocket
DatagramSocket datagramSocket = connector.getDataSocket();
if (datagramSocket != null) {
this.iceSocket = new IceUdpSocketWrapper(datagramSocket);
} else {
this.iceSocket = new IceTcpSocketWrapper(connector.getDataTCPSocket());
}
DatagramPacket rcvPacket = new DatagramPacket(receiveBuffer, 0, receiveBuffer.length);
// Receive loop, breaks when SCTP socket is closed
try {
do {
iceSocket.receive(rcvPacket);
RawPacket raw =
new RawPacket(rcvPacket.getData(), rcvPacket.getOffset(), rcvPacket.getLength());
raw = transformer.reverseTransform(raw);
// Check for app data
if (raw == null) continue;
if (LOG_SCTP_PACKETS) {
LibJitsi.getPacketLoggingService()
.logPacket(
PacketLoggingService.ProtocolName.ICE4J,
new byte[] {0, 0, 0, (byte) (debugId + 1)},
remoteSctpPort,
new byte[] {0, 0, 0, (byte) debugId},
5000,
PacketLoggingService.TransportName.UDP,
false,
raw.getBuffer(),
raw.getOffset(),
raw.getLength());
}
// Pass network packet to SCTP stack
sctpSocket.onConnIn(raw.getBuffer(), raw.getOffset(), raw.getLength());
} while (true);
} finally {
// Eventually, close the socket although it should happen from
// expire().
synchronized (this) {
assocIsUp = false;
acceptedIncomingConnection = false;
if (sctpSocket != null) {
sctpSocket.close();
sctpSocket = null;
}
}
}
}