1 files changed, 49 insertions, 0 deletions
diff --git a/jsonrpc/src/main/java/com/orbekk/net/BroadcastListener.java b/jsonrpc/src/main/java/com/orbekk/net/BroadcastListener.java
new file mode 100644
index 0000000..50cdbc7
--- /dev/null
+++ b/jsonrpc/src/main/java/com/orbekk/net/BroadcastListener.java
@@ -0,0 +1,49 @@
+package com.orbekk.net;
+
+import java.io.IOException;
+import java.net.DatagramPacket;
+import java.net.DatagramSocket;
+import java.net.SocketException;
+
+import org.apache.log4j.Logger;
+
+public class BroadcastListener {
+    private int port;
+    private Logger logger = Logger.getLogger(getClass());
+    
+    public BroadcastListener(int port) {
+        this.port = port;
+    }
+    
+    public boolean listen() {
+        logger.info("Waiting for broadcast on port " + port);
+        DatagramSocket socket;
+        try {
+            socket = new DatagramSocket(port);
+        } catch (SocketException e) {
+            logger.warn("Failed to create socket.", e.fillInStackTrace());
+            return true;
+        }
+        try {
+            socket.setBroadcast(true);
+        } catch (SocketException e) {
+            logger.warn(e.fillInStackTrace());
+        }
+        byte[] buffer = new byte[2048];
+        DatagramPacket packet = new DatagramPacket(buffer, buffer.length);
+        try {
+            socket.receive(packet);
+        } catch (IOException e) {
+            logger.warn(e.fillInStackTrace());
+        }
+        logger.info("Received broadcast from " + packet.getAddress() +
+                ": " + new String(packet.getData()));
+        return true;
+    }
+    
+    public static void main(String[] args) {
+        int port = Integer.parseInt(args[0]);
+        BroadcastListener listener = new BroadcastListener(port);
+        System.out.println("Received broadcast: " + listener.listen());
+    }
+}