libjava/classpath/test/java.net/MulticastClient.java

   1 /* Test Multicast Sockets */
   2
   3 import java.net.*;
   4 import java.io.*;
   5
   6 public class MulticastClient
   7 {
   8
   9 public static void
  10 main(String[] argv) throws IOException
  11 {
  12   System.out.println("Starting multicast tests");
  13   System.out.println("NOTE: You need to do an 'ifconfig <interface> " +
  14                      "multicast' or this will fail on linux");
  15
  16   byte[] buf = { 'H', 'e', 'l', 'l', 'o', ',', ' ', 'W', 'o','r','l','d' };
  17
  18   /* Simple Send */
  19   System.out.println("Test 1: Multicast send/receive test");
  20   try
  21     {
  22       InetAddress addr = InetAddress.getByName("234.0.0.1");
  23
  24       MulticastSocket s = new MulticastSocket();
  25       DatagramPacket p = new DatagramPacket(buf, buf.length, addr, 3333);
  26
  27       s.joinGroup(addr);
  28       s.send(p);
  29       s.close();
  30     }
  31   catch(IOException e)
  32     {
  33       System.out.println("FAILED: simple multicast send: " + e);
  34     }
  35
  36   /* Options */
  37   System.out.println("Test 2: Multicast socket options");
  38   try
  39     {
  40       InetAddress addr;
  41       MulticastSocket s = new MulticastSocket();
  42
  43       System.out.println("TTL = " + s.getTTL());
  44       System.out.println("Setting TTT to 121");
  45       s.setTTL((byte)12);
  46       System.out.println("TTL = " + s.getTTL());
  47
  48       InetAddress oaddr = s.getInterface();
  49       System.out.println("Multicast Interface = " + oaddr);
  50       System.out.println("Setting interface to localhost");
  51       addr = InetAddress.getByName("198.211.138.177");
  52       s.setInterface(addr);
  53       System.out.println("Multicast Interface = " + s.getInterface());
  54       System.out.println("Setting interface to " + oaddr);
  55       s.setInterface(oaddr);
  56       System.out.println("Multicast Interface = " + s.getInterface());
  57     }
  58   catch(IOException e)
  59     {
  60       System.out.println("FAILED: multicast options: " + e);
  61     }
  62 }
  63
  64 }
  65