Hi, I didn't solve it. The Invite wasn't forked. The reason that you see 2 call-IDs is that I use SBC instead of proxy, and the SBC acts as B2BUA. The SBC IP is 60.101.201.1 it manages 2 legs of the call independently (meaning different dialogs). The capture shows the UAC side. Thanks, Noga ________________________________ From: pjsip-bounces@xxxxxxxxxxxxxxx [mailto:pjsip-bounces at lists.pjsip.org] On Behalf Of Benny Prijono Sent: Monday, February 16, 2009 12:01 PM To: pjsip list Subject: Re: PRACK and local outbound proxy Noga, have you resolved this? Looking at your pcap trace I don't see anything wrong there. Here's what I think had happened: - The INVITE forked, and both 180 responses wants 100rel. - PJSIP sent the first PRACK to the first call-leg (the first 180 response). It sent the PRACK to the URI in the Contact of the 180 response, as you expected. - But this PRACK was responded with 481, hence terminating the dialog. cheers Benny On Wed, Feb 11, 2009 at 1:14 PM, Noga Yehudai <nogab at juniper.net> wrote: It should deliver the next request to the URI from the contact - which is the sbc uri. Noga. ________________________________ From: pjsip-bounces@xxxxxxxxxxxxxxx [mailto:pjsip-bounces at lists.pjsip.org] On Behalf Of Gang Liu Sent: Thursday, February 05, 2009 3:29 PM To: pjsip list Subject: Re: PRACK and local outbound proxy Pls consider, how can pjsua know where callee is if your SBC hide the callee contact. On Thu, Feb 5, 2009 at 8:47 PM, Noga Yehudai <nogab at juniper.net> wrote: Inline ________________________________ From: pjsip-bounces@xxxxxxxxxxxxxxx [mailto:pjsip-bounces at lists.pjsip.org] On Behalf Of Gang Liu Sent: Thursday, February 05, 2009 12:58 PM To: pjsip list Subject: Re: PRACK and local outbound proxy inline. On Thu, Feb 5, 2009 at 6:42 PM, Noga Yehudai <nogab at juniper.net> wrote: New requests within the dialog will usually go where stated in contact header of the previous response or as you said using the record route URI. The outbound proxy configuration claims that any request will pass through the proxy, regardless of the contact/RR URIs. This isn't true for RFC 3261. [Noga] you are right, only apply to req' uri. I use SBC instead of proxy, and I can't make it add record route, therefore there will be no record route at all. But it does put its own URI in the contact header - and this was ignored by pjsip as well. I don't think it is SBC. It didn't change contact of 180 respond. [Noga] it does change the contact; please see line 5 in cap file as opposed to line 4. Regards, Noga ________________________________ From: pjsip-bounces@xxxxxxxxxxxxxxx [mailto:pjsip-bounces at lists.pjsip.org] On Behalf Of Gang Liu Sent: Thursday, February 05, 2009 12:26 PM To: pjsip list Subject: Re: PRACK and local outbound proxy I didn't check pjsip source code to check how PRACK handle preloaded route set. But I think CANCEL goes wherever the INVITE went, using the same route. But PRACK, UPDATE, INFO not this way. Correct me if my understanding is wrong. BTW, any Record-Route Header added into 200 OK respond? regards, Gang On Thu, Feb 5, 2009 at 5:28 PM, Noga Yehudai <nogab at juniper.net> wrote: Isn't that the point of local outbound proxy configuration - to always pass through the proxy? For example re-inv passes through the proxy with the same configuration. Regards, Noga ________________________________ From: pjsip-bounces@xxxxxxxxxxxxxxx [mailto:pjsip-bounces at lists.pjsip.org] On Behalf Of Gang Liu Sent: Thursday, February 05, 2009 10:58 AM To: pjsip list Subject: Re: PRACK and local outbound proxy Enable record route at your proxy and try again. 180 ring from proxy don't include Record-Route Header. regards, Gang On Thu, Feb 5, 2009 at 3:33 PM, Noga Yehudai <nogab at juniper.net> wrote: Hi, I found a problem when using Pjsua with -use-100rel and -outbound. When using outbound proxy with PRACK, the PRACK will be sent directly to the user and bypass the proxy. Do you have any idea how to overcome this issue? Is it a known bug? I attached the capture of the call you can use Wireshark to view it. 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