[SR-Users] min expires question

[Klaus Darilion]

There is no way to prevent that a SIP client sends you a request at any
time.

The standard defined behavior for setting REGISTER interval is by
setting the expires header.

Of course you could block which does not use the provided expires
header, but then it may increase load on your support team because
customers will start to complain.

regards
Klaus

Am 22.08.2011 15:15, schrieb Fabian Borot:
> I think that can easily become a problem if all the users decide to send
> registrations as they please. I tried looking into ratelimit and pike
> and it wont solve my problem.
> What is the extent of the setting min_expires on this module? Will it
> create a 423 reply to the user or is not the intended behavior?
> 
> In the mean time I am trying to craft a 423 Message when the expires in
> the Contact header or in the Expires header is less than the min_expires
> set in the config but I am having problems parsing and looking for the
> Expires header. With the expires in the contact is easy using the select
> feature or parsing the whole contact using $ct:
> 
> xlog("L_INFO","mylog: Contact Header: [$ct].\n");
> $var(c_expires) = $(ct{s.select,1,=});
> 
> or this way, it is more accurate
> 
> $sel(@contact.expires)
> 
> 
> but I can't find a way to do the same thing with the Expires headers. In
> the same page that I found the "select " it says:
> "The *select* is a READ-ONLY "function", that helps to get direct access
> to some parts of SIP message within the script (like @to, @cseg.method,
> @msg["P-anyheader-youwant"]) ...."
> 
> So I am trying to use this @msg["P-anyheader-youwant"] but I can't make
> it work.
> 
>  Any ideas?
> txs a lot in advance
> 
> 
> _______________________________________________
> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
> sr-users at lists.sip-router.org
> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users