[SR-Users] received parameter in route URI not used despite path use_received set to 1

[Daniel-Constantin Mierla]

Hello,

try to run with debug=3 in kamailio.cfg and watch the logs, you may get
some hints about what happens, maybe there is some error in processing
or overwriting of destination address.

Cheers,
Daniel

On 18.03.21 11:51, Easy Rider wrote:
> Hi
>
> I'd like to make sure I've understood correctly how use_received in
> path module is supposed to work, because I don't get what I expected
> to get after reading the documentation
> I've got a little set up with a UAC behind a NAT registering to a
> kamailio registrar through a kamailio edge proxy (he UAC is a simple
> sipp script simulating a UAC behind a NAT)
> path is enabled on both EP and registrar, and use_received is set to 1
> on EP
>
> the path, contact and via headers in the REGISTER going from the EP to
> the registrar are :
>
> Via: SIP/2.0/UDP
> 192.168.26.129;branch=z9hG4bK20da.9f4ab6ad25eae6acdd4bd4d655b320ce.0
> Via: SIP/2.0/UDP
> 10.0.0.5:6060;received=192.168.26.1;rport=23456;branch=z9hG4bK-105-1-1
> Contact: <sip:1000 at 10.0.0.5:6060
> <http://sip:1000@10.0.0.5:6060>>;methods="INVITE, ACK, BYE, CANCEL,
> OPTIONS" 
> Path: <sip:inside at 192.168.26.129
> <mailto:sip%3Ainside at 192.168.26.129>;lr;received=sip:192.168.26.1:23456
> <http://192.168.26.1:23456>>
>
> where 192.168.26.129 is obviously the edge proxy
>
> then I place a call to the UAC through registrar
> the EP receiveds the following INVITE :
>
> INVITE sip:1000 at 10.0.0.5:6060 <http://sip:1000@10.0.0.5:6060> SIP/2.0
> Record-Route: <sip:192.168.26.142;lr>
> Via: SIP/2.0/UDP
> 192.168.26.142;branch=z9hG4bKdf25.142eebc72e940d07ad983a858c67f64e.0
> Route: <sip:inside at 192.168.26.129
> <mailto:sip%3Ainside at 192.168.26.129>;lr;received=sip:192.168.26.1:23456
> <http://192.168.26.1:23456>>
> Via: SIP/2.0/UDP
> 192.168.26.1:34567;received=192.168.26.1;rport=34567;branch=z9hG4bK-107-1-1
> From: "1001" <sip:1001 at my-fake-domain.com
> <mailto:sip%3A1001 at my-fake-domain.com>>;tag=107-1
> To: <sip:1000 at my-fake-domain.com
> <mailto:sip%3A1000 at my-fake-domain.com>;user=phone>
> CSeq: 1 INVITE
> Call-ID: 1-107 at 192.168.26.1 <mailto:1-107 at 192.168.26.1>
> Contact: <sip:1001 at 192.168.26.1:34567
> <http://sip:1001@192.168.26.1:34567>>
> ...
>
> The Route header is exactly what is expected, but the edge proxy still
> sends the request to the request-URI address (10.0.0.5:6060
> <http://10.0.0.5:6060>) instead of sending the request to the received
> address set in the first Route header
> The path module documentation states :
>
>
>       3.1. |use_received| (int)
>
> If set to 1, the “received” parameter of the first Route URI is
> evaluated and used as destination-URI if present.
>
>
> kamailio configuration on the EP is almost the default one (just added
> path support, and modified the REGISTRAR route to forward the request
> instead on saving the contact, so there is not even a mid registrar on
> the EP
>
> tried with kamailio 5.3.7 and 5.4.4
>
> thanks
>
> _______________________________________________
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> sr-users at lists.kamailio.org
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-- 
Daniel-Constantin Mierla -- www.asipto.com
www.twitter.com/miconda -- www.linkedin.com/in/miconda
Funding: https://www.paypal.me/dcmierla

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