Hi, I agree with R?gis that it is in the responsibility of the the application rather than the SIP stack to act upon network changes. In your original email you specifically ask about Android and the use case of switching between 3G and WIFI. Check out Android's ConnectivityManager: http://developer.android.com/reference/android/net/ConnectivityManager.html and "Check if Internet access is available on Android": http://stackoverflow.com/questions/11662707/check-if-internet-access-is-available-on-android You can create a BroadcastReceiver and listen for network change events, like @Override public void onReceive(Context context, Intent intent) { if (ConnectivityManager.CONNECTIVITY_ACTION.equals(intent.getAction()) { ConnectivityManager manager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE); if (manager != null) { NetworkInfo networkInfo = manager.getActiveNetworkInfo(); // or NetworkInfo networkInfoWifi = manager.getNetworkInfo(ConnectivityManager.TYPE_WIFI); // etc... // decide here what to do in which case, e.g. restart the SIP stack in case of network change } } http://developer.android.com/reference/android/content/BroadcastReceiver.html Hope this helps. Fabian On Wed, Aug 22, 2012 at 6:06 PM, R?gis Montoya <r3gis.3r at gmail.com> wrote: > Hi, > > The very first problem is that "Active IP address" is something that > doesn't exists. Told like that it makes no sense on any good OS. It's not > specific to Android ! > > Something important to understand is that an OS can have several IP > addresses. Then it's network routes and rules that allows to connect the > rest of the universe. > So for example if you have two interfaces (wifi + vpn for example), you > have at least 2 IP. > Besides on recent android phones + recent networks you'll also get ipv6 > addresses. So even with one "network" you'll get two addresses. (I > obviously exclude loopback address that is again another one). > What you could try is to get the ipv4 address of the interface connected > to the default gateway. At least with that as target, you are searching > something that you can find. (while searching "active ip address" is > something that makes no sense). To search the ipv4 address of the interface > connected to default gateway several solutions. Maybe with java api, or > maybe with network route files. > If you have a server address to test it would be easier to open a socket > to it and see your local address however (as doing that automatically > resolves routes and interfaces). > > > > > On 22/08/2012 17:16, shawn wang wrote: > > Hi,R?gis : > Do you know the best way to obtain current active ip address on > Android? Because I have a device > that allow two types of network connected at the same time, then when > iterating networking interface, we > will get two ip addresses, but we don't know which is the one that is > being used by the system. > > On Wed, Aug 22, 2012 at 12:32 AM, R?gis Montoya <r3gis.3r at gmail.com>wrote: > >> Hi Shaun, >> >> From my experience on CSipSimple it's not something that is relevant of >> the sip stack. >> Besides, it's not simple to support on android and may depend on your >> approach on that. Depending on whether you'd like to support VPN connection >> *for example* approach will be different. It will also be different >> depending on what android version you'd like to support. >> You can get inspired on what's done on Android stock SIP application... >> BTW, you'll see it's also not responsibility of the sip stack but of the >> sip application to decide whether to restart or not the sip stack in the >> implementation from Google too... so I think that's not a bad idea ;). >> >> Best regards, >> R?gis >> >> >> On 21/08/2012 18:24, Shaun Clark wrote: >> >> When the Android app goes between wifi and 3g the call does not >> automatically switch, I can call 'n' which re-does the NAT, but then >> looking at this page: http://trac.pjsip.org/repos/wiki/IPAddressChangenone of these approaches seem to work. Since mobile phones often switch >> back and forth between wifi and 3g/mobile this seems like a great feature >> to build into pjsip. Is there a way to easily handle this now on Android? >> Thanks! >> >> Shaun >> >> >> _______________________________________________ >> Visit our blog: http://blog.pjsip.org >> >> pjsip mailing listpjsip at lists.pjsip.orghttp://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org >> >> >> >> _______________________________________________ >> Visit our blog: http://blog.pjsip.org >> >> pjsip mailing list >> pjsip at lists.pjsip.org >> http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org >> >> > > > _______________________________________________ > Visit our blog: http://blog.pjsip.org > > pjsip mailing listpjsip at lists.pjsip.orghttp://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org > > > > _______________________________________________ > Visit our blog: http://blog.pjsip.org > > pjsip mailing list > pjsip at lists.pjsip.org > http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org > > -------------- next part -------------- An HTML attachment was scrubbed... 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