Hi !
I have the exact same issue as Alexis. This is my SIP flow (which I believe must be very similar, if not identical, to Alexis' ):
10.20.0.1:5060 10.20.20.1:5060 ──────────┬───────── ──────────┬───────── 19:49:35.432327 │ INVITE (SDP) │ +0.007536 │ ──────────────────────────> │ 19:49:35.439863 │ 100 trying -- your call is │ +0.006997 │ <────────────────────────── │ 19:49:35.446860 │ 300 SL - Multiple Choices │ +0.001942 │ <────────────────────────── │ 19:49:35.448802 │ ACK │ │ ──────────────────────────> │ │ │
INVITE sip:1@10.20.20.1:5060 SIP/2.0 Via: SIP/2.0/UDP 10.20.0.1:5060;branch=z9hG4bK-3147164-1-0 From: sipp sip:sipp@10.20.0.1:5060;tag=1 To: sip:1@10.20.20.1:5060 Call-ID: 1-3147164@10.20.0.1 CSeq: 1 INVITE Contact: sip:sipp@10.20.0.1:5060;transport=UDP> Max-Forwards: 70 Subject: Performance Test Content-Type: application/sdp User-Agent: SIPp Session-Expires: 3600;refresher=uas Supported: replaces, timer Content-Length: 129
v=0 o=user1 53655765 2353687637 IN IP4 10.20.0.1 s=- c=IN IP4 10.20.0.1 t=0 0 m=audio 6000 RTP/AVP 0 a=rtpmap:0 PCMU/8000
SIP/2.0 100 trying -- your call is important to us Via: SIP/2.0/UDP 10.20.0.1:5060;branch=z9hG4bK-3147164-1-0 From: sipp sip:sipp@10.20.0.1:5060;tag=1 To: sip:1@10.20.20.1:5060 Call-ID: 1-3147164@10.20.0.1 CSeq: 1 INVITE Server: kamailio (5.8.2 (x86_64/linux)) Content-Length: 0
SIP/2.0 300 - Multiple Choices Via: SIP/2.0/UDP 10.20.0.1:5060;branch=z9hG4bK-3147164-1-0 From: sipp sip:sipp@10.20.0.1:5060;tag=1 To: sip:1@10.20.20.1:5060;tag=d360f2f6fe5d9cd3912155e609771cc6-f406b8d3 Call-ID: 1-3147164@10.20.0.1 CSeq: 1 INVITE Contact: < sip:service@10.20.0.3:5060?P-Asserted-Identity=%2216001%22%3Csip%3A16001%3Bverstat%3DTN-Validation-Passed%4010.20.0.2%3A5060%3E
Server: kamailio (5.8.2 (x86_64/linux)) Content-Length: 0
(The above 300 - Multiple Choice message has a new Contact header, that will be used by SBC to redirect the call somewhere else)
ACK sip:1@10.20.20.1:5060 SIP/2.0 Via: SIP/2.0/UDP 10.20.0.1:5060;branch=z9hG4bK-3147164-1-3 Max-Forwards: 70 From: sip:sipp@10.20.0.1:5060;tag=1 To: sip:1@10.20.20.1:5060;tag=d360f2f6fe5d9cd3912155e609771cc6-f406b8d3 Contact: sip:sipp@10.20.0.1:5060 Call-ID: 1-3147164@10.20.0.1 CSeq: 1 ACK User-Agent: SIPp Content-Length: 0
From this point, Kamailio will re-send the 300 Multiple Choice message, repeating until timeout...
Atenciosamente / Kind Regards / Cordialement / Un saludo,
*Sérgio Charrua*
On Mon, Dec 23, 2024 at 11:05 PM Ben Kaufman via sr-users < sr-users@lists.kamailio.org> wrote:
Does your 3xx message have a Contact, and does that Contact URI match the RURI in your ACK?
*Kaufman*
*Senior Voice Engineer *
E: bkaufman@bcmone.com
SIP.US Client Support: 800.566.9810 *|* SIPTRUNK Client Support: 800.250.6510 *|* Flowroute Client Support: 855.356.9768 [image: img] https://www.sip.us [image: img] https://www.siptrunk.com *[image: img] https://www.flowroute.com*
*From:* Alexis Fidalgo via sr-users sr-users@lists.kamailio.org *Sent:* Monday, December 23, 2024 3:19 PM *To:* Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org *Cc:* Alexis Fidalgo alzrck@gmail.com *Subject:* [SR-Users] help on how to get ACK
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Hello all, moving just a bit aside of the http and async_http.
After all the real useful and interesting thread on that topic what helped me, im facing a problem i cant deal with and need a hint at least.
Scenario
INVITE -> Kamailio
on request_route ... if(is_method("INVITE")){ t_newtran(); http_async_query("http://nuc:8080", "HTTP_REPLY"); } …
Kamailio -> 100 - Trying
then
route[HTTP_REPLY] { if ($http_ok) { xlog("L_INFO", "route[HTTP_REPLY]: status $http_rs\n"); xlog("L_INFO", "route[HTTP_REPLY]: body $http_rb\n"); t_reply(302,"Redirect"); } else { xlog("L_INFO", "route[HTTP_REPLY]: error $http_err)\n"); } }
Kamailio -> 302 Redirect ACK -> Kamailio
This last ACK, how can i read it and use it to terminate the transaction? because Kamailio keeps transmitting the 302 message 3 more times until the transaction is finished by a timer
42(44) DEBUG: tm [t_reply.c:1723]: t_retransmit_reply(): reply retransmitted. buf=0x7f4c44f9d680: SIP/2.0 3..., shmem=0x7f4c3fce7900: SIP/2.0 3 42(44) DEBUG: tm [t_reply.c:1723]: t_retransmit_reply(): reply retransmitted. buf=0x7f4c44f9d680: SIP/2.0 3..., shmem=0x7f4c3fce7900: SIP/2.0 3 42(44) DEBUG: tm [t_reply.c:1723]: t_retransmit_reply(): reply retransmitted. buf=0x7f4c44f9d680: SIP/2.0 3..., shmem=0x7f4c3fce7900: SIP/2.0 3 42(44) DEBUG: tm [timer.c:642]: wait_handler(): finished transaction: 0x7f4c3fcd35a0 (p:0x7f4c3fad85d0/n:0x7f4c3fad85d0) 42(44) DEBUG: tm [h_table.c:133]: free_cell_helper(): freeing transaction 0x7f4c3fcd35a0 from timer.c:651
in request_route i have
if(is_method("ACK")){ if(!t_check_trans()){ t_release(); } exit; }
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