You can try event_route[tm:local-request] for this. On Tue, 25 Feb 2020, 15:36 Marco Capetta, &lt;mcapetta(a)sipwise.com <mailto:mcapetta@sipwise.com>> wrote: Hi All, I have a question regarding call forking and how to access failed branches: the ones for which kamailio sends out the CANCEL because on another one a 200OK was received. This is the scenario:   - A calls B   - 3 devices are registered on B, so a parallel forking is done to B1, B2 and B3   - B1, B2, and B3 all reply with 180 Ringing   - B1 replies with 200OK   - Kamailio CANCELs the branches with B2 and B3 What I need is access to each single CANCEL that Kamailio sends out to B2 and B3. In particular I need to know the branch-id and Via branch of all the cancelled branches. Additionally it would be perfect to have them inside the TM module, in order to have access also to internal AVPs. I tried with dedicated failure routes and also with per-branch failure routes, but I was never able to access to those values. I also didn't found a specific event-route that can help me solve this problem. Does anyone have an idea? Kamailio version 5.2.5 Thanks Regards Marco _______________________________________________ Kamailio (SER) - Users Mailing List sr-users(a)lists.kamailio.org <mailto:sr-users@lists.kamailio.org> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users _______________________________________________ Kamailio (SER) - Users Mailing List sr-users(a)lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users

Hello, the last option to try is onsend_route and if the CANCEL shows up there, then use some string operations over $snd(buf) to get the Via branch, last value after "." being the branch index. I am not sure you can get the INVITE avps there, but you can try. Otherwise a new event route has to be added for this purpose. Probably not much coding, depends of what is wanted to be exposed there, as the cancel is generated locally, there is no incoming sip_msg_t structure. Cheers, Daniel On 26.02.20 10:12, Marco Capetta wrote: Hi Yuriy, thanks for the suggestion. I tried both "event_route[tm:local-request]" and "event_route[tm:local-response]" but internally generated CANCEL messages are not captured by those event routes. On the contrary, I can see that OPTIONS, NOTIFY and also PUBLISH messages are there. Do you have any other suggestion? Thanks Regards Marco On 2/25/20 5:50 PM, Yuriy Gorlichenko wrote: You can try event_route[tm:local-request] for this. On Tue, 25 Feb 2020, 15:36 Marco Capetta, &lt;mcapetta(a)sipwise.com&gt; wrote: _______________________________________________ Kamailio (SER) - Users Mailing Listsr-users@lists.kamailio.orghttps://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users -- * Marco Capetta * VoIP Developer Sipwise GmbH <http://www.sipwise.com> , Campus 21/Europaring F15 AT-2345 Brunn am Gebirge Phone: +43(0)1 301 2044 <+4313012044> Email: mcapetta(a)sipwise.com Website: www.sipwise.com Particulars according Austrian Companies Code paragraph 14 "Sipwise GmbH" - Europaring F15 - 2345 Brunn am Gebirge FN:305595f, Commercial Court Vienna, ATU64002206 _______________________________________________ Kamailio (SER) - Users Mailing Listsr-users@lists.kamailio.orghttps://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users -- Daniel-Constantin Mierla -- www.asipto.comwww.twitter.com/miconda -- www.linkedin.com/in/miconda Kamailio Advanced Training - March 9-11, 2020, Berlin - www.asipto.com Kamailio World Conference - April 27-29, 2020, in Berlin -- www.kamailioworld.com _______________________________________________ Kamailio (SER) - Users Mailing List sr-users(a)lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users