From 6c07dca8e013b913567b38c29fc1c02f04a4768e Mon Sep 17 00:00:00 2001
From: Balint Kovacs <blint@blint.hu>
Date: Wed, 4 May 2011 14:07:25 +0200
Subject: [PATCH] Implemented network state change listener that stops the
 service on connectivity loss and starts it once connectivity is regained

Signed-off-by: Balint Kovacs <blint@blint.hu>
---
 AndroidManifest.xml                           |  7 ++++-
 .../blint/ssldroid/NetworkChangeReceiver.java | 31 +++++++++++++++++++
 .../blint/ssldroid/SSLDroidTunnelDetails.java | 19 +++++++-----
 .../blint/ssldroid/TcpProxyServerThread.java  |  1 -
 4 files changed, 49 insertions(+), 9 deletions(-)
 create mode 100644 src/hu/blint/ssldroid/NetworkChangeReceiver.java

diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 8dcbdb3..54dabc4 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -18,11 +18,16 @@
 			</intent-filter>
 		</service>
 		<receiver android:name="BootStartupReceiver">
-			<intent-filter>
+			<intent-filter>			
 				<action android:name="android.intent.action.BOOT_COMPLETED" />
 				<category android:name="android.intent.category.HOME" />
 			</intent-filter>
 		</receiver>
+		<receiver android:name="NetworkChangeReceiver">
+			<intent-filter>
+				<action android:name="android.net.conn.CONNECTIVITY_CHANGE"/>
+			</intent-filter>
+		</receiver>
 	</application>
 	<uses-permission android:name="android.permission.INTERNET" />
 	<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
diff --git a/src/hu/blint/ssldroid/NetworkChangeReceiver.java b/src/hu/blint/ssldroid/NetworkChangeReceiver.java
new file mode 100644
index 0000000..05c0542
--- /dev/null
+++ b/src/hu/blint/ssldroid/NetworkChangeReceiver.java
@@ -0,0 +1,31 @@
+package hu.blint.ssldroid;
+
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.net.ConnectivityManager;
+import android.net.NetworkInfo;
+import android.util.Log;
+
+public class NetworkChangeReceiver extends BroadcastReceiver{
+  
+    @Override
+    public void onReceive(Context context, Intent intent) {
+	ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService( Context.CONNECTIVITY_SERVICE );
+	NetworkInfo activeNetInfo = connectivityManager.getActiveNetworkInfo();
+	if ( activeNetInfo == null ) {
+		Intent i = new Intent();
+		i.setAction("hu.blint.ssldroid.SSLDroid");
+		context.stopService(i);
+		return;
+	}
+	Log.d("SSLDroid", activeNetInfo.toString());
+	if (activeNetInfo.isAvailable()) {
+		Intent i = new Intent();
+		i.setAction("hu.blint.ssldroid.SSLDroid");
+		context.stopService(i);
+		context.startService(i);   
+	}
+    }
+}
+
diff --git a/src/hu/blint/ssldroid/SSLDroidTunnelDetails.java b/src/hu/blint/ssldroid/SSLDroidTunnelDetails.java
index 052da93..6bbdebb 100644
--- a/src/hu/blint/ssldroid/SSLDroidTunnelDetails.java
+++ b/src/hu/blint/ssldroid/SSLDroidTunnelDetails.java
@@ -18,10 +18,12 @@ import java.util.ListIterator;
 
 import android.app.Activity;
 import android.app.AlertDialog;
+import android.content.Context;
 import android.content.DialogInterface;
 import android.content.Intent;
 import android.content.DialogInterface.OnClickListener;
 import android.database.Cursor;
+import android.net.ConnectivityManager;
 import android.os.Bundle;
 import android.os.Environment;
 import android.util.Log;
@@ -66,7 +68,6 @@ public class SSLDroidTunnelDetails extends Activity {
             }
 		});
 
-		
 		rowId = null;
 		Bundle extras = getIntent().getExtras();
 		rowId = (bundle == null) ? null : (Long) bundle
@@ -119,12 +120,16 @@ public class SSLDroidTunnelDetails extends Activity {
 					return;
 				}
 				else {
-					//remote host should exist
-					try {
-						InetAddress.getByName(remotehost.getText().toString());
-					} catch (UnknownHostException e){
-						Toast.makeText(getBaseContext(), "Remote host not found, please recheck...", Toast.LENGTH_LONG).show();
-					}
+				    	//if we have interwebs access, the remote host should exist
+				    	ConnectivityManager conMgr =  (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);
+
+				    	if ( conMgr.getActiveNetworkInfo() != null || conMgr.getActiveNetworkInfo().isAvailable()) {
+				    	    try {
+				    		InetAddress.getByName(remotehost.getText().toString());
+				    	    } catch (UnknownHostException e){
+				    		Toast.makeText(getBaseContext(), "Remote host not found, please recheck...", Toast.LENGTH_LONG).show();
+				    	    }
+				    	}
 				}
 				//remote port validation
 				if (remoteport.getText().length() == 0){
diff --git a/src/hu/blint/ssldroid/TcpProxyServerThread.java b/src/hu/blint/ssldroid/TcpProxyServerThread.java
index 2a50041..3ef44a1 100644
--- a/src/hu/blint/ssldroid/TcpProxyServerThread.java
+++ b/src/hu/blint/ssldroid/TcpProxyServerThread.java
@@ -155,7 +155,6 @@ public class TcpProxyServerThread extends Thread {
 	public void run() {
 		while (true) {			
 			try {
-				//TODO: close client sockets if no data network is available
 				Thread fromBrowserToServer = null;
 				Thread fromServerToBrowser = null;