[SR-Users] is_first_hop() fails to detect 'myself' when using advertise

[Daniel-Constantin Mierla]

Hello,

I just added a note in the docs that it works only when RR has IP
address in its URI.

The reason is that the IP in RR is compared with source address in order
to see if it is a loop, so if there is no IP in RR, then it returns
false/-1.

It is how the function was designed, if someone wants to make some
alternative, just propose a patch.

Cheers,
Daniel

On 03.10.18 23:46, Joel Serrano wrote:
> I actually had this exact problem, and because I knew when I was first
> hop and when not, I ended up adding if conditions to solve the
> problem. I would love to know the answer to this too and the correct
> reason as to why it happens and how to correct it.
>
>
>
>
>
> On Wed, Oct 3, 2018 at 11:34 PM Sergiu Pojoga <pojogas at gmail.com
> <mailto:pojogas at gmail.com>> wrote:
>
>     Hi ppl,
>
>     If I add a FQDN advertise address to the listen statement,
>     /is_first_hop()
>     <https://kamailio.org/docs/modules/4.3.x/modules/siputils.html#siputils.f.is_first_hop>/
>     seems to return FALSE no matter how I play with the listen and
>     alias settings.
>
>     listen=udp:1.1.1.1:5060 <http://1.1.1.1:5060> advertise
>     sip.mydomain.net:5060 <http://sip.mydomain.net:5060>
>     alias="sip.mydomain.net:5060 <http://sip.mydomain.net:5060>"
>
>     This statement doesn't get executed in the /onreply_route/
>
>     /onreply_route[MANAGE_REPLY] {/
>
>         /if(is_first_hop())/
>
>             /set_contact_alias();  # contact alias doesn't get set?/
>
>     /}/
>
>     *is_first_hop()*
>     /"The function returns true if the proxy is first hop after the
>     original sender. For incoming SIP replies, it means that top
>     Record-Route URI is 'myself' and source address is not matching it"/
>
>     *This is the reply.*
>     2018/10/03 17:03:38.276846 2.2.2.2:62033 <http://2.2.2.2:62033> ->
>     1.1.1.1:5060 <http://1.1.1.1:5060>
>     SIP/2.0 200 OK
>     Via: SIP/2.0/UDP
>     sip.mydomain.net:5060;branch=z9hG4bK49b3.bfbe15.0;received=1.1.1.1
>     Via: SIP/2.0/UDP 10.10.10.10:5060;rport=5060;branch=z9hG4bK1af96136
>     *Record-Route*: <sip:sip.mydomain.net
>     <http://sip.mydomain.net>;lr=on;did=4cc.734>
>     Contact: <sip:888 at 10.17.0.35:62033 <http://sip:888@10.17.0.35:62033>> 
>
>     Suggestions?
>
>     Thanks.
>     _______________________________________________
>     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
>
>
>
> _______________________________________________
> Kamailio (SER) - Users Mailing List
> sr-users at lists.kamailio.org
> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users

-- 
Daniel-Constantin Mierla -- www.asipto.com
www.twitter.com/miconda -- www.linkedin.com/in/miconda
Kamailio World Conference -- www.kamailioworld.com
Kamailio Advanced Training, Nov 12-14, 2018, in Berlin -- www.asipto.com

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.kamailio.org/pipermail/sr-users/attachments/20181004/3e5c99c4/attachment.html>