[SR-Users] Record-route on sequential requests

[Kristian F. Høgh]

Hi again,

I looked at the wrong request, when I wrote it was a patch we applied in-house.
(I looked at Route: header received from UA, not RR send by kamailio.)

RR on sequential requests have no did/vsf, using vanilla kamailio version 4.2.5 as written below.
If required I can test later using master. (I tested ealier, but it included our patches, which doesn't make any difference on 4.2.5)

The questions still remain.
Should kamailio add did/vsf on sequential requests, when I call record_route()?
Should I set dlg_match_mode to 1? (I use 0)
Is it wrong to call record_route() from sequential requests?

Regards,
Kristian.


On Friday 27 November 2015 12:54:50 Kristian F. Høgh wrote:
Hi list,

Record-route on sequential requests doesn't have did/vsf parm.

On initial INVITE, I call record_route() and set dialog flag.
kamailio adds the following RR
Record-Route: <sip:ww.xx.yy.zz;lr;ftag=15af612df;vsf=AAAA....;did=4a8.3ca2>

UAC sends a re-INVITE, containing the following route:
Route: <sip:178.21.251.54;lr;ftag=15af612df;vsf=AAAA....;did=4a8.3ca2>
I call loose_route() followed by record-route(), and kamailio adds the following RR:
Record-Route: <sip:ww.xx.yy.zz;lr;ftag=15af612df>

I've got a phone which updates the routeset on sequential requests (which I don't think it should) and the did-matching fails.
Should kamailio add did/vsf on sequential requests, when I call record_route()?
Should I set dlg_match_mode to 1? (I use 0)
Is it wrong to call record_route() from sequential requests?

Which way is the best to resolve the problem?

Regards,
Kristian Høgh
Uni-tel A/S
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