[OpenSIPS-Users] Opensips 1.9.1 and NAT

[dpa]

OK, but in the current case another question.

Is nat_bflag appear in transaction when call goes TO uac behind nat (by
using lookup(), for example), or it appears  in transaction when call goes
FROM uac behind nat?

 

Thank you.

 

From: users-bounces at lists.opensips.org
[mailto:users-bounces at lists.opensips.org] On Behalf Of Ali Pey
Sent: Monday, November 25, 2013 8:38 PM
To: OpenSIPS users mailling list
Subject: Re: [OpenSIPS-Users] Opensips 1.9.1 and NAT

 

You also examining isbflagset(10). Isn't that set?

 

Regards,

Ali Pey

 

On Mon, Nov 25, 2013 at 3:09 AM, dpa <denis7979 at mail.ru> wrote:

Hello

 

I understand but in onreply route I make a test: nat_uac_test("55") and only
if it successful I make “fix_nated_contact()”.

In my case nat_uac_test("55") must be fail after checking 183 ringing and
200 OK.

 

From: users-bounces at lists.opensips.org
[mailto:users-bounces at lists.opensips.org] On Behalf Of Ali Pey
Sent: Friday, November 22, 2013 5:37 PM
To: OpenSIPS users mailling list
Subject: Re: [OpenSIPS-Users] Opensips 1.9.1 and NAT

 

Hello,

 

The question is not quite clear. In your opensips.cfg you call
"fix_nated_contact()" on both route and reply route. that's why it changes
the route.

 

There is no such a thing as direction in opensips unless it's implemented in
your logic. A message goes through your route or reply route scripts when it
reaches opensips. 

 

Regards,

Ali

 

On Fri, Nov 22, 2013 at 1:10 AM, dpa <denis7979 at mail.ru> wrote:



Hello

 

I have a one question about nat processing of Opensips.

 

There is such scheme

 

UAC1 (softphone behind nat) à Opensips -> UAC2 (another softswitch), i.e.
UAC1 initiates a call to Opensips and a signaling port = 5068.

 

So UAC2 becomes “ringing” by sending 183 message.

 

In attachment 183 message from UAC2 and some parts of opensips.cfg

 

After 183 processing by Opensips port in Contact header of 183 (and later
200 OK) messages become 5060, i.e. Opensips detects NAT and changes Contact
header.

 

So my question is, Why does Opensips changes Contact header?

Once Opensips detects nat transaction (setting setflag(21)) is it check all
reply messages (and doesn`t matter from which UAC they have been received)
or Opensips can detect direction and makes decision about nat process?

 

Thank you  for any help.

 

 

 

 

 


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