Add missing file: EventListener.java

diff --git a/src/nl/openfortress/android6bed4/EventListener.java b/src/nl/openfortress/android6bed4/EventListener.java
new file mode 100644 (file)
index 0000000..e298c8f
--- /dev/null
+++ b/src/nl/openfortress/android6bed4/EventListener.java
@@ -0,0 +1,116 @@
+
+package nl.openfortress.android6bed4;
+
+
+import java.net.NetworkInterface;
+import java.net.InetAddress;
+import java.net.SocketException;
+import java.util.Enumeration;
+import java.util.Collection;
+import java.util.Vector;
+
+
+import android.content.BroadcastReceiver;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.content.Context;
+import android.net.ConnectivityManager;
+
+
+/* The EventListener class picks up signals from the Android OS,
+ * and processes them internally.
+ * 
+ * Upon receiving BOOT_COMPLETED, it will see if the user wishes
+ * to start 6bed4 at boot time. Since this presents a popup, this
+ * is a setting that must be explicitly configured.  More details:
+ * http://stackoverflow.com/questions/5051687/broadcastreceiver-not-receiving-boot-completed
+ * 
+ * Upon receiving CONNECTIVITY_ACTION, it will see if there is a
+ * default route over IPv6 that does not a 6bed4 address.  See:
+ * http://stackoverflow.com/questions/5276032/connectivity-action-intent-recieved-twice-when-wifi-connected
+ * http://developer.android.com/reference/android/net/ConnectivityManager.html 
+ */
+class EventListener extends BroadcastReceiver {
+       
+       private TunnelService netcfg_target;
+       
+       public void onReceive (Context ctx, Intent intent) {
+               String act = intent.getAction ();
+               
+               if (act.equals (ConnectivityManager.CONNECTIVITY_ACTION)) {
+                       //
+                       // The Network Configuration has changed.
+                       // The NetworkInfo for the affected network is sent as an extra
+                       if (netcfg_target == null) {
+                               return;
+                       }
+                       try {
+                               Collection <byte[]> ipv6list = new Vector <byte[]> ();
+                               Enumeration <NetworkInterface> nif_iter = NetworkInterface.getNetworkInterfaces ();
+                               while (nif_iter.hasMoreElements ()) { 
+                                       NetworkInterface nif = nif_iter.nextElement ();
+                                       try {
+                                               if (nif.isUp ()) {
+                                                       Enumeration <InetAddress> adr_iter = nif.getInetAddresses ();
+                                                       while (adr_iter.hasMoreElements ()) {
+                                                               InetAddress adr = adr_iter.nextElement ();
+                                                               if (adr.isLoopbackAddress () || adr.isLinkLocalAddress () || adr.isAnyLocalAddress () || adr.isSiteLocalAddress () || adr.isMulticastAddress ()) {
+                                                                       continue;
+                                                               }
+                                                               byte ipv6addr [] = adr.getAddress ();
+                                                               if (ipv6addr.length != 16) {
+                                                                       continue;
+                                                               }
+                                                               ipv6list.add (ipv6addr);
+                                                       }
+                                               }
+                                       } catch (SocketException se) {
+                                               ;       /* Ignore */
+                                       }
+                                       // Now tell the tunnel service about ipv6list
+                                       netcfg_target.notify_ipv6_addresses (ipv6list);
+                               }
+                       } catch (SocketException se) {
+                               ;       /* Ignore */
+                       }
+                       
+               } else if (act.equals (Intent.ACTION_BOOT_COMPLETED)) {
+                       //
+                       // The system has finished booting.  Consider starting 6bed4
+                       // at this point (if the user is willing to deal with the popup
+                       // from the VPN toolkit at this point.
+                       Intent main = new Intent (Intent.ACTION_MAIN);
+                       main.addCategory (Intent.CATEGORY_HOME);
+                       ctx.startActivity (main);
+               }
+               
+       }
+       
+       /* Register this object as a network monitor reporting to the
+        * given TunnelService object when the set of local IPv6 addresses
+        * changes.  Note that the TunnelService is supposed to be smart
+        * enough to avoid endless loops; the monitor simply reports if a
+        * notification comes in, even if it is caused by 6bed4.
+        */
+       public void register_network_monitor (TunnelService target) {
+               if (netcfg_target != null) {
+                       unregister_network_monitor ();
+               }
+               netcfg_target = target;
+               IntentFilter intflt = new IntentFilter (Context.CONNECTIVITY_SERVICE);
+               /* TODO -- how to get to the current context?!?
+               Context ctx = getApplicationContext ();
+               ctx.registerReceiver (this, intflt);
+               */
+
+       }
+       
+       /* Unregister this object as a network monitor reporting to a
+        * once-setup TunnelService.
+        */
+       public void unregister_network_monitor () {
+               //TODO// how to unregister for CONNECTIVITY_SERVICE broadcasts?
+               netcfg_target = null;
+       }
+       
+}
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