[SR-Users] Issue with ACK's
danq at dial9.co.uk
Fri Nov 30 16:47:54 CET 2018
Thanks for that, I’ve been reading the RFC but clearly missed the bit about section 13.
> On 30 Nov 2018, at 15:10, Alex Balashov <abalashov at evaristesys.com> wrote:
> Note that there are two different kinds of ACKs. An ACK for a 2xx
> transaction is an in-dialog request that follows the rules for Section
> 13, and having two Via hops in one of those is entirely appropriate.
> On Fri, Nov 30, 2018 at 02:59:52PM +0000, Dan Quinney wrote:
>> Hi all,
>> I’m having some issues with ACK’s.
>> Specifically, when an ACK reaches Kamailio from either Asterisk or an endpoint, Kamailio is adding a second Via header - which isn’t valid as per RFC 3261 (184.108.40.206);
>> “The ACK MUST contain a single Via header field, and this MUST be equal to the top Via header field of the original request."
>> Endpoints are registered with Kamailio but INVITES are routed via Asterisk for dial plan and media reasons.
>> I’m running fairly bog-standard Kamailio and Asterisk installs.
>> I’ve attached a sample PCAP for if anyone has any suggestions.
>> Kamailio (SER) - Users Mailing List
>> sr-users at lists.kamailio.org <mailto:sr-users at lists.kamailio.org>
>> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users <https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users>
> Alex Balashov | Principal | Evariste Systems LLC
> Tel: +1-706-510-6800 <tel:+1-706-510-6800> / +1-800-250-5920 <tel:+1-800-250-5920> (toll-free)
> Web: http://www.evaristesys.com/ <http://www.evaristesys.com/>, http://www.csrpswitch.com/ <http://www.csrpswitch.com/>
> Kamailio (SER) - Users Mailing List
> sr-users at lists.kamailio.org <mailto:sr-users at lists.kamailio.org>
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