From 9e22aa6aff4627a08cb23f649e323f2b42f0d34d Mon Sep 17 00:00:00 2001
From: Arne Schwabe <arne@rfc2549.org>
Date: Sun, 3 Jun 2012 14:57:16 +0200
Subject: Implement reconnect on network change (closes issue #37)

---
 src/de/blinkt/openvpn/LaunchVPN.java               |  2 +-
 src/de/blinkt/openvpn/NetworkSateReceiver.java     | 59 ++++++++++++++++++++++
 src/de/blinkt/openvpn/OpenVpnManagementThread.java |  6 +++
 src/de/blinkt/openvpn/OpenVpnService.java          | 18 ++++++-
 4 files changed, 83 insertions(+), 2 deletions(-)
 create mode 100644 src/de/blinkt/openvpn/NetworkSateReceiver.java

(limited to 'src/de/blinkt/openvpn')

diff --git a/src/de/blinkt/openvpn/LaunchVPN.java b/src/de/blinkt/openvpn/LaunchVPN.java
index 4b21c959..7b0f6e04 100644
--- a/src/de/blinkt/openvpn/LaunchVPN.java
+++ b/src/de/blinkt/openvpn/LaunchVPN.java
@@ -381,7 +381,7 @@ public class LaunchVPN extends ListActivity implements OnItemClickListener {
 				OpenVPN.logMessage(0, "", "Error writing minivpn binary");
 				return;
 			}
-			OpenVPN.logMessage(0, "", "Building configration...");
+			OpenVPN.logMessage(0, "", getString(R.string.building_configration));
 
 			Intent startVPN = mSelectedProfile.prepareIntent(getBaseContext());
 
diff --git a/src/de/blinkt/openvpn/NetworkSateReceiver.java b/src/de/blinkt/openvpn/NetworkSateReceiver.java
new file mode 100644
index 00000000..77e25acf
--- /dev/null
+++ b/src/de/blinkt/openvpn/NetworkSateReceiver.java
@@ -0,0 +1,59 @@
+package de.blinkt.openvpn;
+
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.SharedPreferences;
+import android.net.ConnectivityManager;
+import android.net.NetworkInfo;
+import android.net.NetworkInfo.State;
+import android.preference.PreferenceManager;
+
+public class NetworkSateReceiver extends BroadcastReceiver {
+	private int lastNetwork=-1;
+	private OpenVpnManagementThread mManangement;
+
+	private String lastStateMsg=null;
+	
+	public NetworkSateReceiver(OpenVpnManagementThread managementThread) {
+		super();
+		mManangement = managementThread;
+	}
+
+	@Override
+	public void onReceive(Context context, Intent intent) {
+		NetworkInfo networkInfo = getCurrentNetworkInfo(context);
+		SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);        
+		boolean sendusr1 = prefs.getBoolean("netchangereconnect", true);
+
+
+		String netstatestring;
+		if(networkInfo==null)
+			netstatestring = "null";
+		else 
+			netstatestring = String.format("%2$s %4$s to %1$s %3$s",networkInfo.getTypeName(),
+					networkInfo.getDetailedState(),networkInfo.getExtraInfo(), networkInfo.getSubtypeName());
+		
+		if(networkInfo!=null && networkInfo.getState() == State.CONNECTED) {
+				int newnet = networkInfo.getType();
+			
+				if(sendusr1 && lastNetwork!=-1 && (lastNetwork!=newnet))
+					mManangement.reconnect();
+							
+				lastNetwork = newnet;
+		}
+		if(!netstatestring.equals(lastStateMsg))
+			OpenVPN.logMessage(0, "Network:", netstatestring);
+		lastStateMsg=netstatestring;
+
+	}
+
+	private NetworkInfo getCurrentNetworkInfo(Context context) {
+		ConnectivityManager conn =  (ConnectivityManager)
+				context.getSystemService(Context.CONNECTIVITY_SERVICE);
+		
+		NetworkInfo networkInfo = conn.getActiveNetworkInfo();
+		return networkInfo;
+	}
+
+}
diff --git a/src/de/blinkt/openvpn/OpenVpnManagementThread.java b/src/de/blinkt/openvpn/OpenVpnManagementThread.java
index 6d67a4e6..723cc4c8 100644
--- a/src/de/blinkt/openvpn/OpenVpnManagementThread.java
+++ b/src/de/blinkt/openvpn/OpenVpnManagementThread.java
@@ -383,4 +383,10 @@ public class OpenVpnManagementThread implements Runnable {
 		return sendCMD;		
 	}
 
+
+	public void reconnect() {
+		managmentCommand("signal SIGUSR1\n");
+		
+	}
+
 }
diff --git a/src/de/blinkt/openvpn/OpenVpnService.java b/src/de/blinkt/openvpn/OpenVpnService.java
index 2b44fe03..8c172115 100644
--- a/src/de/blinkt/openvpn/OpenVpnService.java
+++ b/src/de/blinkt/openvpn/OpenVpnService.java
@@ -24,6 +24,8 @@ import android.app.NotificationManager;
 import android.app.PendingIntent;
 import android.content.Context;
 import android.content.Intent;
+import android.content.IntentFilter;
+import android.net.ConnectivityManager;
 import android.net.LocalSocket;
 import android.net.LocalSocketAddress;
 import android.net.VpnService;
@@ -50,6 +52,8 @@ public class OpenVpnService extends VpnService {
 	private String mLocalIPv6=null;
 	private Notification mNotification=null;
 
+	private NetworkSateReceiver mNetworkStateReceiver;
+
 	private static final int HELLO_ID = 1;
 	
 	@Override
@@ -112,6 +116,13 @@ public class OpenVpnService extends VpnService {
 		return sock;
 
 	}
+	
+	void registerNetworkStateReceiver() {
+		  // Registers BroadcastReceiver to track network connection changes.
+        IntentFilter filter = new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION);
+        mNetworkStateReceiver = new NetworkSateReceiver(mSocketManager);
+        this.registerReceiver(mNetworkStateReceiver, filter);
+	}
 
 
 	@Override
@@ -161,7 +172,8 @@ public class OpenVpnService extends VpnService {
 		mServiceThread = new Thread(serviceThread, "OpenVPNServiceThread");
 		mServiceThread.start();
 
-
+		
+		
 		// Open the Management Interface
 		mgmtsocket =  openManagmentInterface(8);
 
@@ -170,6 +182,7 @@ public class OpenVpnService extends VpnService {
 			mSocketManager = new OpenVpnManagementThread(mProfile,mgmtsocket,this);
 			mSocketManagerThread = new Thread(mSocketManager,"OpenVPNMgmtThread");
 			mSocketManagerThread.start();
+			registerNetworkStateReceiver();
 		}
 
 		return START_NOT_STICKY;
@@ -182,6 +195,9 @@ public class OpenVpnService extends VpnService {
 
 			mServiceThread.interrupt();
 		}
+		  if (mNetworkStateReceiver!= null) {
+	            this.unregisterReceiver(mNetworkStateReceiver);
+	        }
 	}
 
 
-- 
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