[SR-Users] Get destination IP from forwarded invite

[Joel Serrano]

Hello,

If I understand correctly your email, you want the IP/Host of the
destination of the outgoing INVITE that is leaving a Kamailio box?

First of all, how are you forwarding the request? Are you using dispatcher
module?

Here are a couple of options:

1-
https://www.kamailio.org/wiki/cookbooks/5.3.x/pseudovariables#du_-_destination_uri
(although
this depends on your config, it might not be set)

2- https://www.kamailio.org/wiki/cookbooks/5.3.x/core#onsend_route +
https://www.kamailio.org/wiki/cookbooks/5.3.x/pseudovariables#sndto_name


If you can describe a little more how you are doing things we might be able
to give you more information.

Joel.


On Thu, Jan 16, 2020 at 3:53 AM CUMHUR KARAHAN <
cumhur.karahan at consultant.turkcell.com.tr> wrote:

> Hi all,
>
>
>
> I’m a newbie for Kamailio and working on a feature needs end-users’
> destination IP in the first transferred/forwarded invite message.
>
>
>
> Basically, our system/call flow is like:
>
> ClientA -> Kamailio1 -> Kamailio2 -> ClientB
>
>
>
> Invite from the clientA:
>
>
>
> *tls:212.252.34.165:32980 <http://212.252.34.165:32980>*
>
> *tls:172.21.193.100:5061 <http://172.21.193.100:5061>*
>
> *INVITE sip:905364167881 at testsip.tvoip.turkcell.com.tr:443
> <http://sip:905364167881@testsip.tvoip.turkcell.com.tr:443> SIP/2.0*
>
> *Via: SIP/2.0/TLS 100.64.13.139:56993;branch=z9hG4bK.GoiTxA4Ee;rport*
>
> *From: <sip:905368601286 at testsip.tvoip.turkcell.com.tr
> <sip%3A905368601286 at testsip.tvoip.turkcell.com.tr>>;tag=WbINy0ypx*
>
> *To: sip:905364167881 at testsip.tvoip.turkcell.com.tr
> <sip%3A905364167881 at testsip.tvoip.turkcell.com.tr>*
>
> *CSeq: 20 INVITE*
>
> *…*
>
>
>
> Needed Ip (Client B’s IP 10.252.180.51 for this case) is in the INVITE row
> of the forwarded message.
>
>
>
> Invite to the Kamailio2 :
>
>
>
> *udp:172.21.193.100:5060 <http://172.21.193.100:5060>*
>
> *udp:172.21.193.98:5060 <http://172.21.193.98:5060>*
>
> *INVITE sip:905364167881@**10.252.180.51**:36945;transport=tls SIP/2.0*
>
> *Record-Route:
> <sip:gearbox11.turkcell.tgc:5060;r2=on;lr;did=7f5.f572;nat=yes>*
>
> *Record-Route:
> <sip:testsip05.tvoip.turkcell.com.tr:443;transport=tls;r2=on;lr;did=7f5.f572;nat=yes>*
>
> *Via: SIP/2.0/UDP
> gearbox11.turkcell.tgc:5060;branch=z9hG4bK67ad.4e8e863f2475ab8d3053af0593548557.1;i=f*
>
> *Via: SIP/2.0/TLS
> 100.64.13.139:56993;received=212.252.34.165;branch=z9hG4bK.1SYkXD1Me;rport=32980*
>
> *From: <sip:905368601286 at testsip.tvoip.turkcell.com.tr
> <sip%3A905368601286 at testsip.tvoip.turkcell.com.tr>>;tag=WbINy0ypx*
>
> *To: sip:905364167881 at testsip.tvoip.turkcell.com.tr
> <sip%3A905364167881 at testsip.tvoip.turkcell.com.tr>*
>
> *CSeq: 21 INVITE*
>
> *…*
>
>
>
> When the first invite message receives, the dialog variables or sel(msg…)
> parsed values belong to this first received message, as far as I understand
> during the tests. However I need the forwarded invite message’s variables.
> Even after t_relay in RELAY route, it looks the message I have is the first
> one. So, I cannot reach this later IP in the forwarded invite message. As
> far as I understand, bear with me here please, this IP manipulation
> executes in t_relay function and in the C side of Kamailio. So, I cannot
> find a way to do that in the our native scripts.
>
>
>
> Is there any way to get it without diving C code’s abyss? Do you have any
> idea about it? I would appreciate it, if I can get any help or any clue.
>
>
>
> Thanks for all...
>
>
>
> S. Cumhur Karahan
>
>
>
>
> <http://turkcell.li/ncfYh>
>
> Bu elektronik posta ve onunla iletilen butun dosyalar sadece gondericisi
> tarafindan almasi amaclanan yetkili gercek ya da tuzel kisinin kullanimi
> icindir. Eger soz konusu yetkili alici degilseniz bu elektronik postanin
> icerigini aciklamaniz, kopyalamaniz, yonlendirmeniz ve kullanmaniz
> kesinlikle yasaktir ve bu elektronik postayi derhal silmeniz gerekmektedir.
>
> TURKCELL bu mesajin icerdigi bilgilerin doğruluğu veya eksiksiz oldugu
> konusunda herhangi bir garanti vermemektedir. Bu nedenle bu bilgilerin ne
> sekilde olursa olsun iceriginden, iletilmesinden, alinmasindan ve
> saklanmasindan sorumlu degildir. Bu mesajdaki gorusler yalnizca gonderen
> kisiye aittir ve TURKCELLin goruslerini yansitmayabilir
>
> Bu e-posta bilinen butun bilgisayar viruslerine karsi taranmistir.
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