[SR-Users] Kamailio breaks RFC's 'Contact Header'

[Edward Romanenco]

Yes I did actually, I didn't remove it completely but gave an exception in the vein of -

event_route[topoh:msg-outgoing] {
  if($sndto(ip)=="10.1.1.10") {
    drop;
  }

Thanks Daniel and Henning!

Edward
________________________________
From: Henning Westerholt <hw at skalatan.de>
Sent: Monday, March 30, 2020 9:40 PM
To: Kamailio (SER) - Users Mailing List <sr-users at lists.kamailio.org>; sr-users at lists.sip-router.org <sr-users at lists.sip-router.org>
Cc: Edward Romanenco <edward at telemessage.com>
Subject: RE: Kamailio breaks RFC's 'Contact Header'


Hello,



Quoting from the bug report, where Daniel already replied:



“It looks like you are using topoh module, which has the purpose of changing the headers that contain ip addresses. Remove it from your config.”



Have you tried already to deactivate this module in your cfg?



Cheers,



Henning





--

Henning Westerholt – https://skalatan.de/blog/

Kamailio services – https://gilawa.com<https://gilawa.com/>



From: sr-users <sr-users-bounces at lists.kamailio.org> On Behalf Of Edward Romanenco
Sent: Sunday, March 29, 2020 2:51 PM
To: sr-users at lists.sip-router.org
Subject: [SR-Users] Kamailio breaks RFC's 'Contact Header'



Description

I'm running Kamailio 5.2.0, whenever I relay an invite via Kamailio, my original contact header is changed from the original:

sip:+XXXXXXXXX at YYY.YYY.YYY.YYYY:5060;transport=udp;gw=netvision

To

sip:YYY.YYY.YYY.YYY;line=sr-.n274i0TMfsHMcCAlVyAMV5IlgCXvV8n4edQlgIUlgKQ4Vk74gI1LmZ69NM79FZAR3JC.cDNLfHUj3Wnp3MP9nd*.

Even when I set it correctly on my route, using:

remove_hf("Contact");

append_hf("Contact: sip:$tU at YYY.YYY.YYY.YYY:5060;transport=udp;gw=netvision\r\n", "Contact");



It still ends up being modified.

What can I do to keep the contact header as it is?



SIP Traffic

U YYY.YYY.YYY.YYY:5060 -> 81.24.193.248:5060

INVITE sip:+442033202609 at 81.24.193.248:5060 SIP/2.0.

Record-Route: <sip:YYY.YYY.YYY.YYY;r2=on;lr=on;ftag=mp0S9yH11vryH;vsf=AAAAAAAAAAAAAAAAAAAAAAADCAEACRgPGB8AAy4xNjM->.

Record-Route: <sip:2YYY.YYY.YYY.YYY;line=sr-.n274V8TlidQMVyUlg87vV8nlfDXlVHB9VD0.VHB9VDoLGtNRbH7ltlTEkyQl3jXEky1LNMoRkt5ukt5ukt5ukt5ukt5ukt5ukt5ukt5W8M5WktckoLuWAsduktTMm64pCAD>.

Via: SIP/2.0/UDP YYY.YYY.YYY.YYY;branch=z9hG4bK53e9.308596b23ed683368534c9d609dce0f6.0.

Via: SIP/2.0/UDP YYY.YYY.YYY.YYY;branch=z9hG4bKsr-kA2uvfsUlerJWtIylgCXvV8n4edQlgIUlgKQ4Vk74gI1.oJVjb2njburlgCXvV8n4edQlgIUlgKQ4HWsRbWPLVDX.GrXLcAHlcC74nZXKbTVpcHh4b6mMGZvJgLsLcJTkgtGu2PGgy**.

Max-Forwards: 67.

From: +18702935016 <sip:+18702935016 at YYY.YYY.YYY.YYY>;tag=mp0S9yH11vryH.

To: <sip:+442033202609 at 81.24.193.248>.

Call-ID: !!:jbkfMgyHjbsDjblfjqAQlVldvgyHKolDlcIHlcknKVIdjcIT.

CSeq: 18182498 INVITE.

Contact: <sip:YYY.YYY.YYY.YYY;line=sr-.n274i0TMfsHMcCAlVyAMV5IlgCXvV8n4edQlgIUlgKQ4Vk74gI1LmZ69NM79FZAR3JC.cDNLfHUj3Wnp3MP9nd*>.

User-Agent: FreeSWITCH-mod_sofia/1.9.0+git~20180706T160334Z~de3df8dc0e~64bit.

Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY.

Supported: timer, path, replaces.

Allow-Events: talk, hold, conference, refer.

Content-Type: application/sdp.

Content-Disposition: session.

Content-Length: 224.

Remote-Party-ID: "+18702935016" <sip:+18702935016 at YYY.YYY.YYY.YYY>;party=calling;screen=yes;privacy=off.

.

v=0.

o=FreeSWITCH 1585439298 1585439299 IN IP4 ZZZ.ZZZ.ZZZ.ZZZ.

s=FreeSWITCH.

c=IN IP4 ZZZ.ZZZ
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.kamailio.org/pipermail/sr-users/attachments/20200331/68d4439f/attachment-0001.html>