[sr-dev] [SR-Users] Possible bugs in nathelper

[Peter Dunkley]

Hello,

I have done some more detailed testing today and am still seeing the
problem.  I am using Kamailio 3.1.3.

I added the following to the beginning of my route{ } section:


        if (nat_uac_test(flags))
            xlog("NAT'd\n");
        

I then tested the following scenarios using X-Lite 4:

      * Flags = 1, TCP: NAT detected, UDP: NAT not detected
      * Flags = 2, TCP: NAT detected, UDP: NAT not detected
      * Flags = 4, TCP: NAT detected, UDP: NAT not detected
      * Flags = 8, TCP: NAT not detected, UDP: NAT not detected
      * Flags = 16, TCP: NAT detected, UDP: NAT not detected
      * Flags = 32, TCP: NAT not detected, UDP: NAT not detected


The REGISTERs (for TCP and UDP) sent by X-Lite were (with domain and
user name obscured here):


        REGISTER sip:example.com SIP/2.0
        Via: SIP/2.0/TCP
        192.168.0.187:15854;branch=z9hG4bK-d8754z-1c8ee3e957b12a9b-1---d8754z-;rport
        Max-Forwards: 70
        Contact:
        <sip:user at 192.168.0.187:15854;rinstance=80c5894ae6e2ce6f;transport=TCP>
        To: "User"<sip:user at example.com>
        From: "User"<sip:user at example.com>;tag=da2c294e
        Call-ID: NjA3YjNiNDdjZTgwNWVkYzZlOGRkZTU0NTkxNDlkZWQ.
        CSeq: 1 REGISTER
        Expires: 25
        Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY,
        MESSAGE, SUBSCRIBE, INFO
        User-Agent: X-Lite 4 release 4.0 stamp 58832
        Content-Length: 0
        
        REGISTER sip:example.com SIP/2.0
        Via: SIP/2.0/UDP
        192.168.0.187:53264;branch=z9hG4bK-d8754z-a959b8f7e5f1e349-1---d8754z-;rport
        Max-Forwards: 70
        Contact:
        <sip:user at 192.168.0.187:53264;rinstance=d601b2ea0398567c;transport=udp>
        To: "Peter Dunkley"<sip:user at example.com>
        From: "Peter Dunkley"<sip:user at example.com>;tag=753afc8a
        Call-ID: NjBmZmFhNjEzNTFkZGZlMWQwNzdlZjlkYTE1OTc4ZGU.
        CSeq: 1 REGISTER
        Expires: 25
        Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY,
        MESSAGE, SUBSCRIBE, INFO
        User-Agent: X-Lite 4 release 4.0 stamp 58832
        Content-Length: 0


Regards,

Peter

On Mon, 2011-04-11 at 10:32 +0100, Peter Dunkley wrote:

> I tried 63 (all), 55 (all but SDP), and 19 (from the sample
> configuration file).
> 
> I will try it again today.
> 
> Peter
> 
> On Sat, 2011-04-09 at 08:10 +0300, Juha Heinanen wrote: 
> 
> > Peter Dunkley writes:
> > 
> > > nat_uac_test() doesn't seem to work for requests that arrive over UDP.
> > 
> > i don't know which param you tried, but nat_uac_test("2") and
> > nat_uac_test("1") works for me.
> > 
> > -- juha
> > 


-- 
Peter Dunkley
Technical Director
Crocodile RCS Ltd
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