Rename projects.

– jsonrpc → same
– master → same-android

1 files changed, 53 insertions, 0 deletions

diff --git a/same/src/main/java/com/orbekk/net/BroadcastListener.java b/same/src/main/java/com/orbekk/net/BroadcastListener.java
new file mode 100644
index 0000000..c0b66e0
--- /dev/null
+++ b/same/src/main/java/com/orbekk/net/BroadcastListener.java
@@ -0,0 +1,53 @@
+package com.orbekk.net;
+
+import java.io.IOException;
+import java.net.DatagramPacket;
+import java.net.DatagramSocket;
+import java.net.SocketException;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class BroadcastListener {
+    private int port;
+    private Logger logger = LoggerFactory.getLogger(getClass());
+    
+    public BroadcastListener(int port) {
+        this.port = port;
+    }
+    
+    public DatagramPacket listen() {
+        logger.debug("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 null;
+        }
+        try {
+            socket.setBroadcast(true);
+        } catch (SocketException e) {
+            logger.warn("Exception: {}", e);
+        }
+        byte[] buffer = new byte[2048];
+        DatagramPacket packet = new DatagramPacket(buffer, buffer.length);
+        try {
+            socket.receive(packet);
+        } catch (IOException e) {
+            logger.warn("Exception when listening for broadcast: {}", e);
+            return null;
+        }
+        
+        String address = packet.getAddress().getHostAddress();
+        logger.debug("Received broadcast from " + address +
+                ": " + new String(packet.getData()));
+        return packet;
+    }
+    
+    public static void main(String[] args) {
+        int port = Integer.parseInt(args[0]);
+        BroadcastListener listener = new BroadcastListener(port);
+        System.out.println("Received broadcast: " + listener.listen());
+    }
+}