Name: nt126004 Date: 12/09/2002


FULL PRODUCT VERSION :
java -version
java version "1.4.1_01"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.1_01-b01)
Java HotSpot(TM) Client VM (build 1.4.1_01-b01, mixed mode)



FULL OPERATING SYSTEM VERSION : Suse 8.0 Linux 2.4.18


EXTRA RELEVANT SYSTEM CONFIGURATION :
2 Ethernet interfaces
eth0 -> 192.168.1.11/24
eth1 -> 192.168.2.104/24


A DESCRIPTION OF THE PROBLEM :
Basically a multicast socket is created and bound to 2
different IP addresses using 'socket.setInterface', but the
multicasts are coming out the same interface and TTL is 1
even though it is set up 10.



STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1.java Mxmit 239.192.101.100 11000 10 192.168.2.104
2.java Mxmit 239.192.100.100 11000 10 192.168.1.11

EXPECTED VERSUS ACTUAL BEHAVIOR :

The expected results are that there will be multicast stream
on eth1 interface also.

netstat -g reports

eth0 1 239.192.100.100
eth1 1 239.192.101.100

netstat -rn reports
192.168.2.0 0.0.0.0 255.255.255.0 U 40 0 0 eth1
192.168.1.0 0.0.0.0 255.255.255.0 U 40 0 0 eth0
224.0.0.0 0.0.0.0 240.0.0.0 U 40 0 0 eth0
224.0.0.0 0.0.0.0 240.0.0.0 U 40 0 0 eth1
0.0.0.0 192.168.1.1 0.0.0.0 UG 40 0 0 eth0





ERROR MESSAGES/STACK TRACES THAT OCCUR :
tcpdump reports both streams coming out the eth0 interface.

17:46:53.032452 192.168.1.11.11000 > 239.192.100.100.11000: udp 31 (DF) [ttl 1]
17:46:54.602099 192.168.1.11.12000 > 239.192.101.100.12000: udp 30 (DF) [ttl 1]
17:46:58.041458 192.168.1.11.11000 > 239.192.100.100.11000: udp 31 (DF) [ttl 1]
17:46:59.612518 192.168.1.11.12000 > 239.192.101.100.12000: udp 30 (DF) [ttl 1]



REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
Mxmit.java

  import java.net.*;
  import java.io.*;
  import java.lang.*;
  import java.util.*;
  import java.text.DateFormat;

  class Mxmit {
    public static void main( String[] args) {
      if ( args.length != 4) {
        System.err.println(" Syntax -> java Mxmit <address/group> <port> <ttl>
<hostIP>");
        System.exit(-1);
      }
      int delta = Integer.parseInt(args[2]);
      try {
        int port = Integer.parseInt(args[1]);
        MulticastSocket socket = new MulticastSocket(port);

        InetAddress group = InetAddress.getByName(args[0]);
        InetAddress local = InetAddress.getByName(args[3]);

        System.out.println( local );

        socket.setInterface(local);
        socket.joinGroup(group);
        System.out.println(local);
        socket.setTimeToLive(delta);
        System.out.println("TTL -> " + socket.getTimeToLive());
        Date today = new Date();
        String ok = DateFormat.getDateInstance().format(today);
        System.out.println(ok);
        System.out.println(today);

        BufferedReader r = new BufferedReader(new InputStreamReader(System.in));
        String cmd, send;
        int counter = 0;
        while (true) {
          send = new Date() + " " + String.valueOf( counter );
          DatagramPacket packet = new DatagramPacket(send.getBytes(),
send.length(), group, port);
          socket.send(packet);
          Thread.sleep(5000);
          counter++;
        }
      } catch (Exception e) {
       e.printStackTrace();
      }
    }
  }


---------- END SOURCE ----------

CUSTOMER WORKAROUND :
I will have to continue to try to make stream come out eth1
interface.
(Review ID: 178881)
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