Ton of uPnP work and adding NAT-PMP support, still testing...

ext/libnatpmp/JavaTest.java

@@ -0,0 +1,42 @@
+import java.net.InetAddress;
+import java.net.UnknownHostException;
+import java.nio.ByteBuffer;
+
+import fr.free.miniupnp.libnatpmp.NatPmp;
+import fr.free.miniupnp.libnatpmp.NatPmpResponse;
+
+class JavaTest {
+    public static void main(String[] args) {
+	NatPmp natpmp = new NatPmp();
+
+        natpmp.sendPublicAddressRequest();
+        NatPmpResponse response = new NatPmpResponse();
+
+        int result = -1;
+        do{
+            result = natpmp.readNatPmpResponseOrRetry(response);
+	    try {
+		Thread.sleep(4000);
+	    } catch (InterruptedException e) {
+		//fallthrough
+	    }
+        } while (result != 0);
+
+	byte[] bytes = intToByteArray(response.addr);
+
+	try {
+	    InetAddress inetAddress = InetAddress.getByAddress(bytes);
+	    System.out.println("Public address is " + inetAddress);
+	} catch (UnknownHostException e) {
+	    throw new RuntimeException(e);
+	}
+    }
+
+    public static final byte[] intToByteArray(int value) {
+        return new byte[] {
+            (byte)value,
+            (byte)(value >>> 8),
+            (byte)(value >>> 16),
+            (byte)(value >>> 24)};
+    }
+}