Hi,
Record-Route from the UAS in the 2xx response to the initial INVITE transaction should be recast a Route set in in-dialog messages originating from the caller, of which an end-to-end ACK is one.
The next Route header should be followed for reaching the next hop on the network and transport level. The request URI should cosmetically be equivalent to the Contact URI of the far end, but the Route header will cause a deviation in where the request is actually sent.
This is entirely appropriate and correct. Nobody should be ignoring a Route header.
-- Alex
On Sun, Jul 01, 2018 at 10:27:00AM +0300, Yuriy Gorlichenko wrote:
Hi I know that this is not question too much close to the kamialio users but mostly losed to the RFC specifiacations but this community looks like pretty much close to it that is why I want to ask this question here, that's why sorry and thanks for help in this question:
I have a situation when provider sends me 200 response with Request-Route header and changed contact header:
Means response comes from 1.1.1.1:5060 Request-Route contains: 1.1.1.1:5060 But Contact contains: 1.1.1.1:5061
My ACK (handled by kamailio) goes to the 1.1.1.1:5060 as it setted up at the Route Hedaer of ACK (because of Request-Route)
but provider says me that i should use Contact for the ACK
I was surprised because of https://tools.ietf.org/html/rfc3261#section-12.2.1.1 and https://tools.ietf.org/html/rfc3261#section-8.1.2
Says that I should use Route header for reaching destination But I was surprised second time when tested this scenario with FreeSwitch and another softphone (as UA) because of it both sends ACK to the based on Contact address and ignores Route
I just wanna ask if I missed some scenario in the RFC when it is described to ignore Route header for the UA
(I know that I use kamailio on my case as proxy server but should understand finally who should make changes with packet handling)
Thanks one more time for the resonses and sorry one more time for the goal of this question that belongs to the kamailio just partially
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