[SR-Users] In-dialog BYE request, how to return back to original sender ?

[Loic Chabert]

As far i read on Kamailio reposity, WITHINDLG use loose_route() function.
But on BYE request, no Route headers (corresponding to asterisk 1) are
available => BYE request can not be loose routed. Route headers has been
remove by loadbalancer to avoid routing injections on my network (by an
hacker for example).

Example of BYE request sent from IPBX throught Loadbalancer to Kamailio
proxy:

BYE sip:10.0.246.76:5060 SIP/2.0
    Record-Route: <sip:10.0.246.189;r2=on;lr=on;ftag=as08627a3a;socket=udp:
91.129.172.36:5060>
    Record-Route: <sip:91.129.172.36;r2=on;lr=on;ftag=as08627a3a;socket=udp:
91.129.172.36:5060>
    Via: SIP/2.0/UDP
10.0.246.189;branch=z9hG4bK0d3d.f756947e05f126ea9f04daf00218c6fa.0
    Via: SIP/2.0/UDP 91.129.172.1:3198
;received=91.129.172.1;branch=z9hG4bK6896d552;rport=3198
    Max-Forwards: 69
    From: <sip:0450584004 at example.net>;tag=as08627a3a
    To: 0482680110 <sip:0481680110 at example.net
>;tag=0ee03819-900d-4d09-8188-de39ce74afcf
    Call-ID: 25bf2883-640c-4139-aca6-6c3e1170ea60
    CSeq: 102 BYE
    User-Agent: Wazo PBX
    X-Asterisk-HangupCause: Normal Clearing
    X-Asterisk-HangupCauseCode: 16


With:
10.0.246.76 -> Asterisk 1
91.129.172.36 -> Loadbalancer public IP
10.0.246.189 -> Loadbalancer public private

Only Request URI has Asterisk 1 IP address.
If i set more debug on kamailio, message return by kamailio: No transaction
match.

2018-04-04 16:36 GMT+02:00 Daniel Tryba <d.tryba at pocos.nl>:

> On Wed, Apr 04, 2018 at 11:57:55AM +0200, Loic Chabert wrote:
> > Question is simple (but answer will be probably more complex): how can i
> > sent in dialog BYE request to ASTERISK 1, and not asterisk 2.
>
> I'm confused, what does your config look like? The normal way to do this
> just to t_relay() these, see the route[WITHINDLG] in the default example
> config:
> https://github.com/kamailio/kamailio/blob/master/etc/kamailio.cfg
>
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