I have a sample code as below and the socket is bound to IP 10.10.88.11 and port 9876. I tested with the 2 conditions with wireshark as below. Both PCs are in the same subnet.
- Send UDP packet from the same pc (10.10.88.11) - UDP Server able to receive
- Send UDP packet from another pc ( 10.10.88.10) - UDP Server unable to receive but Wireshark (at 10.10.88.11) able to capture the packets
I have searched the internet but can't find a solution for this. Is there anything i did wrong in creating the InetScoketAddress?
import java.io.*;
import java.net.*;
public class UDPServer {
public static void main(String args[]) throws Exception {
InetSocketAddress address = new InetSocketAddress("10.10.88.11", 9876);
DatagramSocket serverSocket = new DatagramSocket(address);
byte[] receiveData = new byte[1024];
byte[] sendData = new byte[1024];
while(true)
{
DatagramPacket receivePacket = new DatagramPacket(receiveData, receiveData.length);
System.out.println("Waiting to receive");
serverSocket.receive(receivePacket);
String sentence = new String( receivePacket.getData());
System.out.println("RECEIVED: " + sentence);
InetAddress IPAddress = receivePacket.getAddress();
int port = receivePacket.getPort();
String capitalizedSentence = sentence.toUpperCase();
sendData = capitalizedSentence.getBytes();
DatagramPacket sendPacket =
new DatagramPacket(sendData, sendData.length, IPAddress, port);
serverSocket.send(sendPacket);
}
}
}
