Enable OTA Update mechanism for any mDNS enabled platform

Adds ability to update the firmware of non-SSH boards using TXT
parameters from mDNS
Three new TXT keys are added (defaults are capital):
  ssh_upload=YES/no
  tcp_check=YES/no
  auth_upload=yes/NO

"ssh_upload" controls which Uploader should be used. Defaults to
SSHUploader
"tcp_check" controls wether TCP reachability test should be performed.
Defaults to "yes". Boards that have few TCP ports available, can use
"no" to skip the check and update over UDP (ESP8266 for example).
"auth_upload" controls wether authentication is required (only for
"ssh_upload=no").

One new pattern and two new variables are available.
Var "network.port" resolves to the advertised by mDNS device port.
Var "network.password" resolves to the entered device password if
upload authentication is used, else it's empty string.
Pattern "upload.network_pattern" is usable if the platform is using
different tool/command to do network updates. If not defined,
"upload.pattern" will be used instead.

arduino-core/src/cc/arduino/packages/UploaderFactory.java

@@ -31,6 +31,7 @@ package cc.arduino.packages;
 
 import cc.arduino.packages.uploaders.SSHUploader;
 import cc.arduino.packages.uploaders.SerialUploader;
+import cc.arduino.packages.uploaders.GenericNetworkUploader;
 import processing.app.debug.TargetBoard;
 
 public class UploaderFactory {
@@ -41,6 +42,9 @@ public class UploaderFactory {
     }
 
     if (port != null && "network".equals(port.getProtocol())) {
+      if(port.getPrefs().get("ssh_upload").contentEquals("no")){
+        return new GenericNetworkUploader(port);
+      }
       return new SSHUploader(port);
     }
 

arduino-core/src/cc/arduino/packages/discoverers/NetworkDiscovery.java

@@ -144,6 +144,21 @@ public class NetworkDiscovery implements Discovery, ServiceListener, cc.arduino.
         port.getPrefs().put("board", board);
         port.getPrefs().put("distro_version", info.getPropertyString("distro_version"));
         port.getPrefs().put("port", "" + info.getPort());
+        
+        //Add additional fields to permit generic ota updates
+        //and make sure we do not intefere with Arduino boards
+        // define "ssh_upload=no" TXT property to use generic uploader
+        // define "tcp_check=no" TXT property if you are not using TCP
+        // define "auth_upload=yes" TXT property if you want to use authenticated generic upload
+        String useSSH = info.getPropertyString("ssh_upload");
+        String checkTCP = info.getPropertyString("tcp_check");
+        String useAuth = info.getPropertyString("auth_upload");
+        if(useSSH == null || !useSSH.contentEquals("no")) useSSH = "yes";
+        if(checkTCP == null || !checkTCP.contentEquals("no")) checkTCP = "yes";
+        if(useAuth == null || !useAuth.contentEquals("yes")) useAuth = "no";
+        port.getPrefs().put("ssh_upload", useSSH);
+        port.getPrefs().put("tcp_check", checkTCP);
+        port.getPrefs().put("auth_upload", useAuth);
       }
 
       String label = name + " at " + address;

arduino-core/src/cc/arduino/packages/discoverers/network/BoardReachabilityFilter.java

@@ -69,7 +69,7 @@ public class BoardReachabilityFilter extends TimerTask {
           ports.add(0, 22);
         }
 
-        boolean reachable = NetUtils.isReachable(inetAddress, ports);
+        boolean reachable = board.getPrefs().get("tcp_check").contentEquals("no") || NetUtils.isReachable(inetAddress, ports);
         if (!reachable) {
           boardPortIterator.remove();
         }

arduino-core/src/cc/arduino/packages/uploaders/GenericNetworkUploader.java

@@ -0,0 +1,112 @@
+/*
+  GenericNetworkUploader - generic network uploader implementation
+  makes possible to implement firmware updates over the air on any device
+  Part of the Arduino project - http://www.arduino.cc/
+
+  Copyright (c) 2004-05
+  Hernando Barragan
+  Copyright (c) 2012
+  Cristian Maglie <c.maglie@arduino.cc>
+  Copyright (c) 2015
+  Hristo Gochkov <hristo.gochkov@gmail.com>
+
+  This program 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+*/
+
+package cc.arduino.packages.uploaders;
+
+import cc.arduino.packages.BoardPort;
+import cc.arduino.packages.Uploader;
+import processing.app.*;
+import processing.app.debug.RunnerException;
+import processing.app.debug.TargetPlatform;
+import processing.app.helpers.PreferencesMap;
+import processing.app.helpers.StringReplacer;
+
+import java.io.File;
+import java.util.List;
+
+import static processing.app.I18n.tr;
+
+public class GenericNetworkUploader extends Uploader {
+
+  private final BoardPort port;
+
+  public GenericNetworkUploader(BoardPort port) {
+    this.port = port;
+  }
+
+  public boolean requiresAuthorization() {
+    return this.port.getPrefs().get("auth_upload").contentEquals("yes");
+  }
+
+  @Override
+  public String getAuthorizationKey() {
+    return "runtime.pwd." + this.port.getAddress();
+  }
+
+  public boolean uploadUsingPreferences(File sourcePath, String buildPath, String className, boolean usingProgrammer, List<String> warningsAccumulator) throws Exception {
+    TargetPlatform targetPlatform = BaseNoGui.getTargetPlatform();
+    PreferencesMap prefs = PreferencesData.getMap();
+    PreferencesMap boardPreferences = BaseNoGui.getBoardPreferences();
+    if (boardPreferences != null) {
+      prefs.putAll(boardPreferences);
+    }
+    String tool = prefs.getOrExcept("upload.tool");
+    if (tool.contains(":")) {
+      String[] split = tool.split(":", 2);
+      targetPlatform = BaseNoGui.getCurrentTargetPlatformFromPackage(split[0]);
+      tool = split[1];
+    }
+    prefs.putAll(targetPlatform.getTool(tool));
+    
+    String password = "";
+    if(requiresAuthorization()){
+      password = prefs.getOrExcept(getAuthorizationKey());
+    }
+    prefs.put("network.password", password);
+
+    prefs.put("network.port", this.port.getPrefs().get("port"));
+    
+    prefs.put("build.path", buildPath);
+    prefs.put("build.project_name", className);
+    if (verbose) {
+      prefs.put("upload.verbose", prefs.getOrExcept("upload.params.verbose"));
+    } else {
+      prefs.put("upload.verbose", prefs.getOrExcept("upload.params.quiet"));
+    }
+    
+    boolean uploadResult;
+    try {
+      String pattern;
+      //check if there is a separate pattern for network uploads
+      pattern = prefs.get("upload.network_pattern");
+      if(pattern == null)
+        pattern = prefs.getOrExcept("upload.pattern");
+      String[] cmd = StringReplacer.formatAndSplit(pattern, prefs, true);
+      uploadResult = executeUploadCommand(cmd);
+    } catch (RunnerException e) {
+      throw e;
+    } catch (Exception e) {
+      throw new RunnerException(e);
+    }
+    return uploadResult;
+  }
+
+  @Override
+  public boolean burnBootloader() throws RunnerException {
+    throw new RunnerException("Burning bootloader is not supported via network!");
+  }
+}