Broadcasting over LAN

Question

I am working on a program that broadcasts a packet over the LAN.I implemented a datagram packet which has some data inside .Is there any way to broadcast this message to the computers without specifying the port number..I want all the computers on LAN to take this packet
here is the part of the code.
DatagramSocket socket = new DatagramSocket();
InetAddress address=InetAddress.getByName("255.255.255.255");
DatagramPacket sendPacket =new DatagramPacket(m,m.length,address,?????);
socket.send(sendPacket);

Answer 1

Hi!
as far as i know you have to set a port number ;) so:
int port = 2000;
DatagramSocket socket = new DatagramSocket(port);
hmm... getByName is not a good idea, try getByAddress, defining a byteArray first (255,255,255,255).
InetAddress address=InetAddress.getByAddress(yourByteArray);
Define your sendPacket like thist, where "buf" is the byteArray of your sendData, like:
buf = sendData.getBytes();
DatagramPacket sendPacket =new DatagramPacket(buf, buf.length, address, port);
finally:
socket.send(sendPacket);
could work...
greetings
commy