[OpenSIPS-Users] Double via in MI generated NOTIFY

Thu Jun 4 01:00:59 CEST 2015

It sounds like you may be sending the NOTIFY to yourself when you use the domain name instead of the IP. Have you verified the address that the domain resolves to? Is it the same as the OpenSIPS instance?

Ben Newlin

From: Stas Kobzar
Reply-To: OpenSIPS users mailling list
Date: Wednesday, June 3, 2015 at 6:00 PM
To: Bogdan-Andrei Iancu
Cc: OpenSIPS users mailling list
Subject: Re: [OpenSIPS-Users] Double via in MI generated NOTIFY

Hi Bogdan,

No, I do not use local_route at all.

My code for these kind of notifies is in the beginning of the initial part  or main route after t_check_trans and looks like this:

----------------------------------------------------------------------------------------
t_check_trans();

# RFC3265: NOTIFY can not be outside SIP dialog.
# So we should drop the packet
if(is_method("NOTIFY")) {
  # There is an exception: if this is a check-sync packet
  # for phone configuration reload request
  if($hdr(Event) =~ "check-sync"){
    lookup("locations", "m");
    xlog("L_INFO", "$ci|$rm| Send reboot request notify packet to destination $ru");
    t_relay();
    exit();
  }
  send_reply("481","Dialog does not exists");
  exit;
}
----------------------------------------------------------------------------------------

I have tried different scenarios:
- Put this code before t_check_trans
- do not use lookup function
- replaced t_relay with forward

Nothing helped.

However, when I run fifo command using IP address in sip URI, like this:
opensipsctl fifo t_uac_dlg NOTIFY sip:7037 at 10.130.8.225<mailto:sip%3A7037 at 10.130.8.225> . . '"From: <sip:7037 at voip.etsmtl.ca<mailto:sip%3A7037 at voip.etsmtl.ca>>;tag=8755a8d01aa27e903a6f4ccaf393f04\r\nTo: <sip:7037 at voip.etsmtl.ca<mailto:sip%3A7037 at voip.etsmtl.ca>>\r\nEvent: check-sync\r\n"'

then, the packet seems to send directly from local_route. Because, in this case, I do not even see it in the logs.

Thank you!
Stas

On Wed, Jun 3, 2015 at 11:05 AM, Bogdan-Andrei Iancu <bogdan at opensips.org<mailto:bogdan at opensips.org>> wrote:
Hi Stas,

Do you do any local_route stuff ? If yes, do you modify the RURI/DURI or other parts of the requests?

Regards,

Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
http://www.opensips-solutions.com

On 01.06.2015 17:42, Stas Kobzar wrote:
Hello,

I am sending NOTIFY packet with event "check-sync" to reload phone configuration.

I am doing it with opensips FIFO mi.

My command looks like this:
opensipsctl fifo t_uac_dlg NOTIFY sip:7037 at 10.130.8.225<mailto:sip%3A7037 at 10.130.8.225> . . '"From: <sip:7037 at voip.etsmtl.ca<mailto:sip%3A7037 at voip.etsmtl.ca>>;tag=8755a8d01aa27e903a6f4ccaf393f04\r\nTo: <sip:7037 at voip.etsmtl.ca<mailto:sip%3A7037 at voip.etsmtl.ca>>\r\nEvent: check-sync\r\n"'

When I use IP address in RURI (sip:7037 at 10.130.8.225<mailto:sip%3A7037 at 10.130.8.225>) it works as expected.

However, when I use domain name in RURI (like this: sip:7037 at campus.voip.etsmtl.ca<mailto:sip%3A7037 at campus.voip.etsmtl.ca>) and my command looks like this:
opensipsctl fifo t_uac_dlg NOTIFY sip:7037 at campus.voip.etsmtl.ca<mailto:sip%3A7037 at campus.voip.etsmtl.ca> . . '"From: <sip:7037 at voip.etsmtl.ca<mailto:sip%3A7037 at voip.etsmtl.ca>>;tag=8755a8d01aa27e903a6f4ccaf393f04\r\nTo: <sip:7037 at voip.etsmtl.ca<mailto:sip%3A7037 at voip.etsmtl.ca>>\r\nEvent: check-sync\r\n"'

I have two Via headers in my resulting NOTIFY packet with different branche tags:

NOTIFY sip:7037 at 10.130.8.225<mailto:sip%3A7037 at 10.130.8.225> SIP/2.0.
Via: SIP/2.0/UDP 10.130.8.20:5060;branch=z9hG4bK0872.598957f2.0.
Via: SIP/2.0/UDP 10.130.8.20:5060;branch=z9hG4bK0872.498957f2.0.
To: sip:7037 at campus.voip.etsmtl.ca<mailto:sip%3A7037 at campus.voip.etsmtl.ca>.
From: <sip:7037 at campus.voip.etsmtl.ca<mailto:sip%3A7037 at campus.voip.etsmtl.ca>>;tag=734c62bd59eb9f33d3e6313898450dd1.
CSeq: 10 NOTIFY.
Call-ID: 693206c572f70ff6-19332 at 10.130.8.20<mailto:693206c572f70ff6-19332 at 10.130.8.20>.
Max-Forwards: 69.
Content-Length: 0.
Server: ETS voip router01.
Event: check-sync
.

In first case, I do not even see the packet in main route but I see it in local_route.

In my second case I see it in main route but the packet is sent with double Via header.

I am sure it is not my routing script, because I have just put a forward to some IP whenever NOTIFY is received and I still have this problem.

Is it a known issue?

Everything still works fine, but having a double Via in logs a bit confusing.

Thank you,
--

Stas Kobzar

Developeur VoIP / VoIP Developer

___________________

Modulis.ca Inc.

# Bureau / Office: 514-284-2020 x 246<tel:514-284-2020%20x%20246>

Email: s<http://firstname.lastname>tas.kobzar at modulis.ca

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--

Stas Kobzar

Developeur VoIP / VoIP Developer

___________________

Modulis.ca Inc.

# Bureau / Office: 514-284-2020 x 246

Email: s<http://firstname.lastname>tas.kobzar at modulis.ca

https://www.modulis.com<https://www.modulis.com/>

[https://www.modulis.com/es-img-001]<https://www.modulis.com/es-url-001>
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