13 May
2020
13 May
'20
4:29 a.m.
I would look to learn more about the ultimate cause of retransmissions
arriving beyond the life cycle of the transaction in Kamailio, as it
seems to possibly portend of a bigger problem.
However, if the issue is one of retransmissions arriving just beyond the
expiration of Kamailio's transaction lifetime holddown timers, you can
tweak those:
https://kamailio.org/docs/modules/5.3.x/modules/tm.html#tm.p.wt_timer
https://kamailio.org/docs/modules/5.3.x/modules/tm.html#tm.p.max_inv_lifeti…
-- Alex
On Tue, May 12, 2020 at 05:15:15PM +0100, Duarte Rocha wrote:
Greetings,
I have an issue where a client doesn't get the responses to the INVITE sent
and as such keeps sending me retransmissions of the INVITE.
While the transaction is still up, Kamailio does its job. However, when the
transaction is closed Kamailio processes the request again as a first
request (Doing Routing and Dispatcher operations again).
In order to avoid the issue i've made the following code :
// If it's the first INVITE
if( is_method("INVITE") && !has_totag() )
{
if(t_check_trans()) {
xnotice("TRANS - INVITE Retransmission");
}
else if ( is_known_dlg()) {
xerr("KamTAG: INVITE in dialog without To Tag ");
exit;
}
}
Is this a good solution and still compliant with the SIP rules?
Best Regards
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--
Alex Balashov | Principal | Evariste Systems LLC
Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free)
Web: http://www.evaristesys.com/, http://www.csrpswitch.com/