[OpenSIPS-Users] Presence route[handle_presence]

[campusvtv]

Hello,

a basic question.

In this block:

route[handle_presence] {
        if (!t_newtran()) {
                sl_reply_error();
                exit;
        }

        if(is_method("PUBLISH")) {
                handle_publish();
        }
        else
        if( is_method("SUBSCRIBE")) {
                handle_subscribe();
        }
        exit;
}

whic is the meaning of:

if (!t_newtran()) {
                sl_reply_error();
                exit;
        }

in other words why I have to use t_newtran function.

Thank you.

Regards



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