Hi, My experience wasn't exactly the same case you mentioned. As I raised before http://permalink.gmane.org/gmane.comp.voip.pjsip/17962 The TCP port seems to be blocked entirely as my server kept resending the invite message. Thanks, Qiulang On 1/15/14, 1:00 AM, s.marek at avm.de wrote: > Hi everyone, > > today I've done a little research on the issue of incoming calls in the > background on iOS. We're getting a lot of negative feedback since the > introduction of iOS 7. > > | sometimes my app won't wake up after it goes to background, however, > | sometimes it will. > > I get the impression, that it depends on the device. We have an iPhone 5 > and an iPhone 5S where almost no call is signalled when the app is in the > background, while another iPhone 5S and an iPhone 4S running the exact > same app work as expected. All devices run iOS 7. > > There was a thread back in December on this list about background > signalling (http://comments.gmane.org/gmane.comp.voip.pjsip/17912) but to > be honest, I don't think the guys are on the right track. As far as I > understood, the incoming INVITE is received on an already connected TCP > socket, and PJSIP is marking that socket fine with > kCFStreamNetworkServiceTypeVoIP. Maybe there is a misunderstanding on my > side? > > Anyway, I was digging up good old printf-debugging and logging the socket > descriptor that is marked as ServiceTypeVoIP (or the CFStream associated > with that socket, to be correct) - i.e. in > activesock_create_iphone_os_stream() in activesock.c. > On the other hand I was printing the socket that the actual recv() is > called on - i.e. in pj_sock_recv() in sock_bsd.c. > > They match. Always. Even on the devices the error is always reproducible > with. In case the call is not signalled while the app is in the > background, recv() is called right in the moment, the app is woken up by > me bringing it into the foreground. Can anyone confirm that? Just as if > iOS forgets that this is a socket marked for background VoIP operation... > > That together with the observation, that up to iOS 6 everything worked as > expected, and the fact that calls in the background do work on some iOS 7 > devices with the exact same app bundle, leads me to the assumption, that > this might simply be a bug in iOS 7. > > I just wanted to check back with you guys before opening a bug report at > Apple. > Any thoughts? Did I miss something? > > Thanks, > Sebastian. > > _______________________________________________ > 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 >
