Multicast Proble under Linux

Question

Hi,
I think here may be a bug in jdk6 . There is a problem with Multicast sockets. If i have two nic and open two Multicast socket (set network interface and join on proper interface ) both of them under Windows send multicast packets . Unfortunetly under linux the same code doesn't work. Packets are always send only via the same and one interface. Why ? Writicng conde in c under linux everything works fine so there is no problem with linux confguration .
How to report a bug or can anyone help me to resolve it

Answer 1

defaultIP = "239.0.0.1" port=1111
public void setInterface(NetworkInterface i){
try {
logger.info("MulticastAnnounce setting interface");
this.address = new InetSocketAddress(defaultIP,port);
this.socket = new MulticastSocket(port);
this.socket.setNetworkInterface(i);
this.socket.joinGroup(this.address,i);
logger.info("MulticastSocket Annoucer success");
this.socket = socket;
}catch(Exception e){
logger.error("Cannot set network Interface:"+e.toString());
Iterator it = networkInterfacesList.iterator();
int i = 0;
while(it.hasNext()){
MulticastCommunicationChannel multicastChannel = new MulticastCommunicationChannel();
NetworkInterface netif = (NetworkInterface)it.next();
multicastChannel.setMessageListener(this.messageHandler);
multicastChannel.setMessageParser(this.messageParser);
multicastChannel.setInterface(netif);
i++;
this.multicastChannels.add(multicastChannel);
logger.info("Staring multicast Channel");
Thread t = new Thread(multicastChannel,"Annoucer MulticastChannel interface:"+netif.getName());
t.start();
}