[Kamailio-Users] Pretty basic Presence question

[Iñaki Baz Castillo]

2009/5/28 Mahesh Paolini-Subramanya <mahesh at aptela.com>:
> force_rport() doesnt do the trick - it was one of the first things i tried
> :-)  All it seems to do is add 'rport=...' to the Via line on the returned
> message, not actually *send* to that port.  Its clearly something
> ridiculously basic.

> Also, fix_nated_contact() doesnt work entirely either.  What it *does* do is
> ensure that the NOTIFY (from the Sbc to the fone) goes to $sp:$si...

Yes, fixing the Contact is just valid for future in-dialog requests,
not for replies.


> Incidentally, if i stick a t_newtran()/t_release around my REGISTER handling
> section, i get the same behavior, i.e., the responses go to 5060 instead of
> the source port (i *am* using force_rport() there).  Is that a Clue?

It seems really wrong... it whouldn't occur at all !



> The difference i see is as follows
> A) Using the following basic code,  the response  (i've omitted most of the
> message)
>    if (!t_newtran()) {
>         sl_reply_error();
>         return(-1);
>     };
>     if (is_method("SUBSCRIBE")) {
>         handle_subscribe();
>         t_release();
>     };
> U 2009/05/28 05:56:44.260579 1.2.3.4:2352 -> 5.6.7.8:5060
> SUBSCRIBE sip:mm1 at 5.6.7.8 SIP/2.0.
> Via: SIP/2.0/UDP 10.0.0.10:5060;branch=z9hG4bK537dd37BF6A3AE6.
> Contact: <sip:mm1 at 10.0.0.10:5060>.
>
> U 2009/05/28 05:56:44.264687 5.6.7.8:5060 -> 1.2.3.4:5060
> SIP/2.0 202 OK.
> Via: SIP/2.0/UDP
> 10.16.0.168:5060;branch=z9hG4bK537dd37BF6A3AE6;received=1.2.3.4.
>
> B) If I use force_rport(), as follows, I get
>
>    if (is_method("SUBSCRIBE")) {
>         force_rport();
>         handle_subscribe();
>         t_release();
>     };
> U 2009/05/28 05:56:44.264687 5.6.7.8:5060 -> 1.2.3.4:5060
> SIP/2.0 202 OK.
> Via: SIP/2.0/UDP
> 10.16.0.168:5060;branch=z9hG4bK537dd37BF6A3AE6;rport=2352;received=1.2.3.4.

Just a question, does it occur for retransmissions or for the initial
requests? Could you add a xlog into "if (!t_newtran())" and "if
(is_method("SUBSCRIBE"))" to ensure it?

Also, try to replace "t_release" with "exit" (it shouldn't affect however).


> ---
> Mahesh Paolini-Subramanya
> CTO,  Aptela Inc.
> (703.386.1500 x9100)
> http://www.aptela.com
>
> On May 27, 2009, at 6:29 PM, Mahesh Paolini-Subramanya wrote:
>
> El Jueves, 28 de Mayo de 2009, Mahesh Paolini-Subramanya escribió:
>
> I'm trying to setup an extremely basic PRESENCE/BLF environment.
>
> However, when I call handle_subscribe(), the message gets sent to $si:
>
> 5060, *not* $si:$sp
>
> I assume you mean "the response gets sent...", right?
>
>
> Any ideas?  Should I be doing something with nat_traversal.co (don't
>
> see what, but worth asking...)
>
> The relevant portion of kamailio.cfg is
>
> Add "force_rport()" here.
>
>    if (!t_newtran()) {
>
>         sl_reply_error();
>
>         return(-1);
>
>     };
>
>     if (is_method("SUBSCRIBE")) {
>
>         handle_subscribe();
>
>         t_release();
>
>     };
>
>
>
>
> --
> Iñaki Baz Castillo <ibc at aliax.net>
>
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-- 
Iñaki Baz Castillo
<ibc at aliax.net>