Hi, I'm encountering an issue when relaying late offer ACKs, before relaying I set the branch_route with t_on_branch() but kamailio never enters that route after calling t_relay
I'm keeping the rtpengine module calls inside branch_routes to avoid issues when re-routing in failure routes
I suppose it's something related to ACK packets but I'm not sure what the issue is.
Any hints?
Thanks, Enrico.
Hello,
the ACK doesn't get through the branch_route block because it is forwarded in stateless mode. The ACK doesn't have a reply, therefore is not transaction state to be kept for it. You have to apply all the rules you want for the ACK inside the request_route logic. If there is a retransmission of the ACK, again it is not detected, so it will just run again through the same rules in request_route. This is of course for the ACK following the 200ok.
Cheers, Daniel
June 25, 2019 1:42 PM, "Bandiera, Enrico" wrote:
Hi, I'm encountering an issue when relaying late offer ACKs, before relaying I set the branch_route with t_on_branch() but kamailio never enters that route after calling t_relay I'm keeping the rtpengine module calls inside branch_routes to avoid issues when re-routing in failure routes I suppose it's something related to ACK packets but I'm not sure what the issue is. Any hints? Thanks, Enrico.
-- Daniel-Constantin Mierla www.kamailio.org -- www.asipto.com
Hi Daniel, thank you. I will add a special case for ACKs in the request route.
Cheers, Enrico.
Il giorno mar 25 giu 2019 alle ore 16:46 Daniel-Constantin Mierla < daniel@kamailio.org> ha scritto:
Hello,
the ACK doesn't get through the branch_route block because it is forwarded in stateless mode. The ACK doesn't have a reply, therefore is not transaction state to be kept for it. You have to apply all the rules you want for the ACK inside the request_route logic. If there is a retransmission of the ACK, again it is not detected, so it will just run again through the same rules in request_route. This is of course for the ACK following the 200ok.
Cheers, Daniel
June 25, 2019 1:42 PM, "Bandiera, Enrico" < enrico.bandiera@cloud.timenet.it <%22Bandiera,%20Enrico%22%20%3Cenrico.bandiera@cloud.timenet.it%3E>> wrote:
Hi, I'm encountering an issue when relaying late offer ACKs, before relaying I set the branch_route with t_on_branch() but kamailio never enters that route after calling t_relay I'm keeping the rtpengine module calls inside branch_routes to avoid issues when re-routing in failure routes I suppose it's something related to ACK packets but I'm not sure what the issue is. Any hints? Thanks, Enrico.
-- Daniel-Constantin Mierla www.kamailio.org -- www.asipto.com _______________________________________________ Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
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Enrico Bandiera