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/* Test Multicast Sockets */
import java.net.*;
import java.io.*;
public class MulticastClient
{
public static void
main(String[] argv) throws IOException
{
System.out.println("Starting multicast tests");
System.out.println("NOTE: You need to do an 'ifconfig <interface> " +
"multicast' or this will fail on linux");
byte[] buf = { 'H', 'e', 'l', 'l', 'o', ',', ' ', 'W', 'o','r','l','d' };
/* Simple Send */
System.out.println("Test 1: Multicast send/receive test");
try
{
InetAddress addr = InetAddress.getByName("234.0.0.1");
MulticastSocket s = new MulticastSocket();
DatagramPacket p = new DatagramPacket(buf, buf.length, addr, 3333);
s.joinGroup(addr);
s.send(p);
s.close();
}
catch(IOException e)
{
System.out.println("FAILED: simple multicast send: " + e);
}
/* Options */
System.out.println("Test 2: Multicast socket options");
try
{
InetAddress addr;
MulticastSocket s = new MulticastSocket();
System.out.println("TTL = " + s.getTTL());
System.out.println("Setting TTT to 121");
s.setTTL((byte)12);
System.out.println("TTL = " + s.getTTL());
InetAddress oaddr = s.getInterface();
System.out.println("Multicast Interface = " + oaddr);
System.out.println("Setting interface to localhost");
addr = InetAddress.getByName("198.211.138.177");
s.setInterface(addr);
System.out.println("Multicast Interface = " + s.getInterface());
System.out.println("Setting interface to " + oaddr);
s.setInterface(oaddr);
System.out.println("Multicast Interface = " + s.getInterface());
}
catch(IOException e)
{
System.out.println("FAILED: multicast options: " + e);
}
}
}
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