[SR-Users] Example kamailio.cfg t_check_trans()

[Phil Lavin]

Thanks, Daniel. I'll update the docs to clarify this, if I get a moment.


Cheers

Phil

From: sr-users [mailto:sr-users-bounces at lists.sip-router.org] On Behalf Of Daniel-Constantin Mierla
Sent: 04 January 2016 08:06
To: Kamailio (SER) - Users Mailing List <sr-users at lists.sip-router.org>
Subject: Re: [SR-Users] Example kamailio.cfg t_check_trans()

Hello,
On 31/12/15 12:39, Phil Lavin wrote:
Hi there,

The example config that Kamailio ships with contains this block of code in request_route:

# handle retransmissions
if(t_precheck_trans()) {
     t_check_trans();
     exit;
}
t_check_trans();

I am not fully understanding the requirement for either of the t_check_trans() here. As far as I can see from the documentation, t_check_trans() returns a boolean value and does not modify any data internally.

Can anyone help me find out what the relevance of the t_check_trans() calls is?

t_check_trans() is used to detect retransmissions. If a retransmission is received, then the last reply (if any) needs to be sent back, then t_check_trans() does an 'exit' internally.

Cheers,
Daniel


--

Daniel-Constantin Mierla

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