From 41447dc7e0110bebbfdc5fd841876985fe880060 Mon Sep 17 00:00:00 2001
From: Douglas Gillespie <50671166+douggillespie@users.noreply.github.com>
Date: Fri, 5 Aug 2022 12:48:32 +0100
Subject: [PATCH] Multiport test

Quick tester for multiport comms
---
 src/PamController/command/MultiportTest.java | 88 ++++++++++++++++++++
 1 file changed, 88 insertions(+)
 create mode 100644 src/PamController/command/MultiportTest.java

diff --git a/src/PamController/command/MultiportTest.java b/src/PamController/command/MultiportTest.java
new file mode 100644
index 00000000..3d828066
--- /dev/null
+++ b/src/PamController/command/MultiportTest.java
@@ -0,0 +1,88 @@
+package PamController.command;
+
+import java.io.IOException;
+import java.net.DatagramPacket;
+import java.net.DatagramSocket;
+import java.net.InetAddress;
+import java.net.InetSocketAddress;
+import java.net.MulticastSocket;
+import java.net.NetworkInterface;
+import java.net.SocketException;
+import java.net.UnknownHostException;
+
+/**
+ * Simple test of multiport communication. 
+ * @author dg50
+ *
+ */
+public class MultiportTest {
+
+	private String addr = "224.100.20.20";
+	private int port = 1290;
+	
+	private String tstStr = "ping";
+	
+	private int BUFFLEN = 512;
+	private byte[] retBuffer = new byte[BUFFLEN];
+	
+	public static void main(String[] args) {
+		new MultiportTest().run();
+	}
+	
+	public MultiportTest() {
+		// TODO Auto-generated constructor stub
+	}
+
+	private void run() {
+		InetAddress mcastaddr;
+		DatagramSocket socket = null;
+//		listInterfaces();
+		try {
+//			mcastaddr = InetAddress.getByName(addr);
+//			InetSocketAddress group = new InetSocketAddress(mcastaddr, port);
+//			NetworkInterface netIf = NetworkInterface.getByName("bge0");
+//			MulticastSocket socket = new MulticastSocket(port);
+//			socket.joinGroup(group, netIf);
+			socket = new DatagramSocket();
+			socket.setSoTimeout(1000);
+			
+			DatagramPacket dataGram  = new DatagramPacket(tstStr.getBytes(), tstStr.length(),
+					InetAddress.getByName(addr), port);
+			
+			socket.send(dataGram);
+
+			DatagramPacket reGram = new DatagramPacket(retBuffer, BUFFLEN);
+			while (true) {
+				socket.receive(reGram);
+				String retStr = new String(reGram.getData(), 0, reGram.getLength());
+				System.out.printf("\"%s\" received from %s %s port %d\n", retStr, reGram.getAddress(), reGram.getSocketAddress(), reGram.getPort());
+			}
+			
+			// clean up
+//			socket.leaveGroup(group, netIf);
+
+		} catch (IOException e) {
+			// TODO Auto-generated catch block
+			System.out.println(e.getMessage());
+		}
+		socket.close();
+		System.out.println("Done");
+		
+	}
+
+	private void listInterfaces() {
+
+		try {
+			// there are 46 of these on my laptop, enumerated from 1. 0 is null.
+			for (int i = 0; i < 50; i++) {
+				NetworkInterface netIf = NetworkInterface.getByIndex(i);
+				System.out.printf("Interface %d : %s\n", i, netIf);
+			}
+		} catch (SocketException e) {
+			// TODO Auto-generated catch block
+			e.printStackTrace();
+		}
+		
+	}
+
+}