I'm implementing a VoIP app on the iPhone and I have a problem with the teardown and restart of the pjsip library. Specifically, when I detect that the user has no network connectivity I want to halt the actions of pjsip SIP send/receive until I detect that a useable network is available. Then I want to restart the SIP send/receive so the the SIP sockets will bind to the new interface, say a transition from Wi-Fi to 3G. I use pjsua_destroy to tear things down. I use the same function to bring the library back up again. The first time I bring the library up everything works. Subsequent loads bring the library up but on receiving an INVITE, I get the error: Warning: 399 iPhone-iOS-5 "No suitable codec for remote offer (PJMEDIA_SDPNEG_NOANSCODEC)" It looks like pjsua_destroy deletes/stops/kills the media subsystem. Nothing in my code explicitly loads or unloads codecs so I'm guessing its a side effect. Question: How do I start/stop pjsip so that I can quiesce SIP traffic when no network interfaces are available and then bring it back up when an interface is available .. and do this frequently, reliably, and cleanly? I'm doing all this because, as far as I can tell, the library does not do reachability probes and rebind sockets to the appropriate interface. According to Apple, CFSocketStreams can pass these events to a callback, but other than mark a TCP socket as VOIP, the library appears to ignore the streams entirely. I know this is a lot, what I'm really doing is trying to get around the fact that the iPhone-specific code in the library does not handle reachability or stream events. TIA T.M. -- Thomas Merriewether Star2Star Communications -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20120612/d2780a67/attachment.html>
