Save() function of the "registrar" module always saves Contact and can save real source to the "received" field of a location record.
lookup() function uses Contact to form R-URI and puts ip:port from the received field to the $du.
If $du is present t_relay() uses it to forward a request to a correct destination.

@Jason

I'm not using any NAT protocol (STUN, ICE, ...) at client. I'm using the default Kamalio config file 3.3.5. If it is the NAT helping code in Kamalio, it means that Kamalio is using 3. IP from IP packet ?

On Tue, Apr 2, 2013 at 1:19 PM, Jason Penton <jason.penton@smilecoms.com> wrote:

There is probably some NAT helping code in your Kamailio config file. Either that or you are using one the NAT protocols, (STUN,ICE,etc).

cheers

Jason

On Tue, Apr 2, 2013 at 2:39 AM, Khoa Pham <onmyway133@gmail.com> wrote:

@Jason

Thanks, but it strange. I only send 1 REGISTER to the server, with the Contact field contains my local IP address. How can I still receive incoming call ?

On Mon, Apr 1, 2013 at 8:10 PM, Jason Penton <jason.penton@smilecoms.com> wrote:

2

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On 1 Apr 2013 14:57, "Khoa Pham" <onmyway133@gmail.com> wrote:

Hi, when client send REGISTER message to Kamalio. Kamailio will save that client's IP to database. 

But what is this IP ? Is is 1,2 or 3 ?

1. The IP from Via field

2. The IP from Contact field

3. The IP from the IP packet

Many thanks

--
Khoa Pham
HCMC University of Science
Faculty of Information Technology

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Khoa Pham
HCMC University of Science
Faculty of Information Technology

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Jason Penton
Senior Manager: Applications and Services
Smile Communications
Johannesburg, South Africa
Phone: +27 83 283 7000

This email is subject to the disclaimer of Smile Communications (PTY) Ltd. at http://www.smilecoms.com/disclaimer

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--
Khoa Pham
HCMC University of Science
Faculty of Information Technology

_______________________________________________
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http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users

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sr-users@lists.sip-router.org
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