Sorry let me elaborate what I did. I use static void ip_change (and all the other methods mentioned in that article, with reachability change detection). But it did not solve my problem. Now I have to call pjsip_transport_shutdown in on_reg_state2 for 408 case and that solved the problem. Thanks, Qiulang On 15/8/27 ??7:09, ? ? wrote: > YES I know that article, it did not help (or I did not get it) > > pjsip_transport_shutdown myself is the only solution I can come up > right now. > > > On 15/8/27 ??6:54, ?????? ?????? ???????? wrote: >> Qiulang, >> >> please refer to http://trac.pjsip.org/repos/wiki/IPAddressChange >> May be, you'll find something usefull :) >> >> Andrey >> ------------------------------------------------------------------------ >> *??: *"? ?" <qiulang at emicnet.com> >> *????: *"pjsip" <pjsip at lists.pjsip.org> >> *????????????: *???????, 27 ?????? 2015 ? 13:35:55 >> *????: *Re: [pjsip] Why pjsip_regc_destroy instead of >> pjsip_transport_shutdown when register failed >> >> Sorry, "changing to a new Wifi" means connecting to another AP (my >> bad). So we are in a big room and set up 2 APs(but of course they >> will get the same outer IP address). >> >> The problem we find is that sometime we walk from one side of room to >> the other side and the phone has already switched to the other AP, >> the app also shows that it has got the new IP address, but when >> re-register, pjsip stack still uses the old transport then register >> will fail with 408. But even in this case pjsip stack will keep using >> old (and invalid) transport to continue to register. >> >> The only solution I can come up with right now is call >> pjsip_transport_shutdown myself and that does fix the problem! But I >> was wondering is there a better way ? >> >> Thanks >> >> Qiulang >> >> >> On 15/8/27 ??4:15, Harald Radke wrote: >> >> Hm, transport is below registration, and I guess you cannot be >> sure that the transport is exclusivly used for the registration, >> thus if a failed registration attempt would shutdown the transport, >> other active connections might suffer from that. >> stupid question: "changing to a new Wifi" means connecting to >> another AP? doesnt your own IP change on such occasions? Does >> your SIP app then still works? Dont you have to restart it anyways? >> Regards, >> Harry >> *Gesendet:* Donnerstag, 27. August 2015 um 05:54 Uhr >> *Von:* "? ?" <qiulang at emicnet.com> >> *An:* "pjsip list" <pjsip at lists.pjsip.org> >> *Betreff:* [pjsip] Why pjsip_regc_destroy instead of >> pjsip_transport_shutdown when register failed >> Hi, >> >> When register failed, why call pjsip_regc_destroy instead of >> pjsip_transport_shutdown (regc_cb in sip_reg.c, pjsip 2.2.1) ? >> >> >> if (param->code < 0 || param->code >= 300) { >> PJ_LOG(2, (THIS_FILE, "SIP registration failed, status=%d >> (%.*s)", >> param->code, >> (int)param->reason.slen, param->reason.ptr)); >> pjsip_regc_destroy(acc->regc); >> >> In my case (email below) I found acc->regc->last_transport is >> NULL, so calling *pjsip_regc_destroy* has no effect. But the >> invalid transport still exists and next time when register pjsip >> will still use it, which I have not figured out why, so the >> register failed! >> >> But if call pjsip_transport_shutdown, register will succeed next >> time. >> >> >> >> >> On 15/8/17 ??6:15, ? ? wrote: >> >> Hi, >> >> When switching to a new WiFi register sometime will fail with >> 408. It does not always happen but when it happens I run out >> of solution but to kill the app and restart it. >> I am using pjsip 2.2.1 does anyone experience this and know >> how to fix it ? >> >> Thanks >> >> Qiulang >> >> _______________________________________________ >> 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 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 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 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 list >> pjsip at lists.pjsip.org >> http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20150827/9cc4a1de/attachment.html>