This is an interesting question. The requests should have different tags .I'm not sure how OpenSIPs handles the individual requests..
I'd tend to expect a 491 Request Pending or a 500 Requests Merged. But maybe that's B2BUA behavior. Since opensips isn't replying to the "second" INVITE, it's almost like it's absorbing it as a retransmission. I'm not sure what your expected behavior is, but it seems that you're going to constantly have race conditions on this and that the outcome will be "random" (ie: does INVITE(1) hit first, or INVITE(2)) What's the larger picture here? Why do you have two INVITEs from the same call hitting your proxy? -Brett On Thu, Jan 21, 2010 at 8:50 AM, Yannick LE COENT <yannick.leco...@nexcom.fr > wrote: > Hello, > > > > The next figure describes my problem. > > > > openSIPS > > +------+ > > -- INVITE(1) -->| |--- INVITE(1) --> > > | | > > -- INVITE(2) -->| |--- INVITE(2) --> > > <-- 180(2) ------| |<-- 180(2) ------ > > <-- 200(2) ------| |<-- 200(2) ------ > > | | > > -- CANCEL(1) -->| | > > <-- 200(CANCEL) -| | > > <-- 487(1) ------| | > > -- ACK(1) ----->| | > > | | > > -- ACK(2) ----->| |--- ACK(2) -----> > > | | > > +------+ > > | > > | > > +------+ > > | | > > | | > > +------+ > > RTP proxy > > > > I use RTP proxy to relay media streams. > > > > INVITE (1) and (2) have been forked from an upstream proxy, thus they have > the same Call-ID and From tag, and a different branch ID. > > INVITE (2) is accepted, but INVITE (1) has no response. > > The upstream proxy cancels INVITE (1). > > > > In my script, on CANCEL(1) request I close the RTP session, but I should > not dot that since INVITE(2) has been accepted. > > > > My questions are: > > How can I know when I received CANCEL(1) that INVITE(2) has been accepted? > > Do I need to use flags? Which ones ? > > > > Thanks for any help, > > Yannick > > _______________________________________________ > Users mailing list > Users@lists.opensips.org > http://lists.opensips.org/cgi-bin/mailman/listinfo/users > >
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