I am looking to configure Kamailio and RTPEngine to play a wav file for any new
calls during a scheduled asterisk server maintenance. I have set up the
following within route{} to send the call to a early_media route based on a
variable that I can set on the server using kamcmd.
route {
...
if ($sht(config=>maint)=="1") {
if (is_method("INVITE") && !has_totag()) {
xlog ("L_INFO","Ongoing maintenance. Call-ID:$ci | Method:
$rm");
route(early_media);
}
}
...
}
route[early_media] {
xlog("Maintenance: handling early_media\n");
rtpengine_manage("direction=external direction=external");
$var(body) = $(rb{re.subst,/(IP4.).*/\1##server IP redacted##/g});
set_reply_body($var(body), "application/sdp");
t_send_reply("183", "Session Progress");
sleep(2);
unblock_dtmf("all");
play_media("file=/etc/kamailio/media/maintenance.wav");
sleep(21);
rtpengine_delete();
t_reply("480","Temporarily Unavailable");
}
This mostly works as I hear the recorded message in place of the ringing tone
when a call is processed by kamailio and then a busy signal is heard as part of
the 480 reply at the end. The sleep's are in place to match the duration of the
recorded message as otherwise the 480 is sent immediately following the start
of the play_media. Feel free to let me know if there is a better solution to
wait the duration of the media file and then proceed with processing instead of
using sleep().
Is there a way to instead send a CANCEL or a BYE instead of a 480 after the wav
file is played? I tried using t_cancel_callid("$ci", "$cs", "0") as well as a
dlg_bye("all") at the end of the early_media route and neither seemed to send
any headers out.
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