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arduino-core/src/cc/arduino/packages/discoverers/simpleudp/UdpRunnable.java

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+/*
+* This file is part of Arduino.
+*
+* Arduino is free software; you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation; either version 2 of the License, or
+* (at your option) any later version.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with this program; if not, write to the Free Software
+* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*
+* As a special exception, you may use this file as part of a free software
+* library without restriction.  Specifically, if other files instantiate
+* templates or use macros or inline functions from this file, or you compile
+* this file and link it with other files to produce an executable, this
+* file does not by itself cause the resulting executable to be covered by
+* the GNU General Public License.  This exception does not however
+* invalidate any other reasons why the executable file might be covered by
+* the GNU General Public License.
+*
+* Copyright 2013 Arduino LLC (http://www.arduino.cc/)
+*/
+
+package cc.arduino.packages.discoverers.simpleudp;
+
+import cc.arduino.packages.BoardPort;
+import processing.app.BaseNoGui;
+import processing.app.Platform;
+import processing.app.debug.TargetBoard;
+
+import java.net.DatagramSocket;
+import java.net.DatagramPacket;
+import java.net.InetAddress;
+import java.net.UnknownHostException;
+
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Collections;
+
+
+import java.util.*;
+
+
+
+public class UdpRunnable implements Runnable {
+
+	private boolean running = true;
+	// local, thread save list
+    public final List<BoardPort> udpBoardPorts = Collections.synchronizedList(new LinkedList<>());
+
+	private int hasip(String ip) {
+		int i = 0;
+        for (BoardPort port : udpBoardPorts) {
+          if (port.getAddress().equals(ip)) {
+      		return i;
+          }
+		  i++;
+        }
+
+		return -1;
+	}
+
+	public void run(){
+		System.out.println("MyRunnable running");
+
+		while (running) 
+		{
+			try
+			{
+				DatagramSocket socket = new DatagramSocket(8531, InetAddress.getByName("0.0.0.0"));
+				socket.setBroadcast(true);
+				System.out.println("Listen on " + socket.getLocalAddress() + " from " + socket.getInetAddress() + " port " + socket.getBroadcast());
+				byte[] buf = new byte[512];
+				DatagramPacket packet = new DatagramPacket(buf, buf.length);
+				while (true) {
+					System.out.println("Waiting for data");
+					socket.receive(packet);
+					System.out.print(packet.getLength());
+     				System.out.print(" Data received from ");
+
+                    String board = null;
+					InetAddress senderip = packet.getAddress();
+     				System.out.println(senderip);
+
+					String msg = new String(packet.getData());
+                    String[] lines = msg.split("\\n");
+
+     				System.out.println("");
+
+     				System.out.print(">>>");
+     				System.out.print(lines[0]);
+     				System.out.println("<<<<");
+
+					// msg typ 1
+					if (lines[0].equals("1")) {
+						if (hasip(senderip.toString())==-1) {
+                          BoardPort port = new BoardPort();
+
+                          port.setAddress(senderip.toString());
+                          port.setProtocol("network");
+                          port.setOnlineStatus(true);
+                          port.setLabel(lines[1]+" at "+senderip.toString());
+
+                          udpBoardPorts.add(port);
+						}
+					}
+				}
+
+			}
+            catch (UnknownHostException e) {
+                e.printStackTrace();
+			}
+			catch ( Exception e )
+			{
+				running=false;
+			}
+		}
+
+	}
+
+	public void terminate()
+	{
+		running = false;
+	}
+
+
+}
+
+/*
+    even more simple device discovery protocol 
+
+	send a broadcase to port 8531
+
+	message format
+
+	1\Ndisplayname\N
+
+	1 - id of this message type
+	    future protocols can choose different numbers to implement more details
+
+
+	Use Collections.synchronizedList().
+
+
+*/
+
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