Hi Duarte, you can find an example in the default config.

Mainly t_check_trans() is taking care of retransmissions, t_precheck_trans is handling more edge cases.

# handle retransmissions if (!is_method("ACK")) { if(t_precheck_trans()) { t_check_trans(); exit; } t_check_trans(); }

On Tue, Apr 10, 2018 at 2:40 AM, Duarte Rocha duarterocha91@gmail.com wrote:

Greetings,

How can i identify the first Invite received by Kamailio in a dialog. I'm checking for the To-Tag in order to identify the first one. However, if the UA retries the same INVITE (because of a timeout for example), it won't have To Tag and it won't be the first INVITE that i'm receiving in that dialog.

Is there any flag or variable that i can use to identify the first Invite received?

Thanks in advance

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