Other comments are welcome too, as I’m fairly
new to Kamailio.
modparam("dialog",
"enable_stats", 1)
modparam("dialog",
"dlg_flag", 4)
modparam("dialog", "hash_size", 4096)
modparam("dialog", "profiles_with_value",
"318005004");
modparam("dialog", "default_timeout", 43200)
modparam("dialog", "dlg_match_mode",2)
modparam("dialog", "detect_spirals", 1)
request_route {
# per request initial checks
route(REQINIT);
# handle requests within SIP dialogs
route(WITHINDLG);
### only initial requests (no To tag)
# CANCEL processing
if (is_method("CANCEL"))
{
if (t_check_trans())
t_relay();
exit;
}
t_check_trans();
# record routing for dialog forming
requests (in case they are routed)
# - remove preloaded route headers
remove_hf("Route");
if (is_method("INVITE")) {
xlog("L_INFO", "Incoming request
for $rU from $fU");
if ($rU == "318005004") {
route(DIALOG);
}
}
# handle registrations
route(REGISTRAR);
if ($rU==$null)
{
# request with no Username in
RURI
sl_send_reply("484","Address
Incomplete");
exit;
}
# dispatch destinations
route(DISPATCH);
route(RELAY);
}
route[DIALOG] {
dlg_manage();
record_route();
$var(SIZE) = 0;
sql_query("vf", "exec
dbo.SelectAvailableSlots '00$rU'", "ra");
$avp(s:limit) = $dbr(ra=>[0,7]);
xlog("L_INFO", "Maximum simultaneous
calls is configured at $avp(s:limit) ....");
sql_result_free("ra");
if ($rU == "318005004") {
get_profile_size("318005004",
"$rU", "$var(SIZE)");
}
xlog("L_INFO", "There are currently
$var(SIZE) calls for $rU, excluding the current call");
if($var(SIZE) >= $avp(s:limit)) {
xlog("L_INFO", "Simultaneous
calls limit of $avp(s:limit) reached for $rU:
$var(SIZE)\n");
sl_send_reply("603",
"Simultaneous calls limit reached");
exit;
}
if ($rU == "318005004") {
set_dlg_profile("318005004",
"$rU");
}
if ($rU == "318005004") {
if(get_profile_size("318005004",
"$var(SIZE)")) {
xlog("L_INFO", "There are
currently $var(SIZE) calls for $rU, including the current
call");
}
}
}
route[WITHINDLG] {
if (has_totag()) {
# sequential request withing a
dialog should
# take the path determined by
record-routing
if (loose_route()) {
#Used for call transfer
if($fU == "318005004") {
if
(is_method("UPDATE")) {
sl_send_reply("405","Method not allowed");
xlog("L_INFO",
"Dropping UPDATE message...\n");
exit;
}
if
(is_method("INVITE")) {
record_route();
}
if (is_method("BYE")) {
dlg_manage();
}
}
if (is_method("BYE")) {
setflag(1); #
do accounting ...
setflag(3); #
... even if the transaction fails
}
route(RELAY);
} else {
if
(is_method("SUBSCRIBE") && uri == myself) {
# in-dialog
subscribe requests
route(PRESENCE);
exit;
}
if ( is_method("ACK") )
{
if (
t_check_trans() ) {
# non
loose-route, but stateful ACK;
# must
be ACK after a 487 or e.g. 404 from upstream server
t_relay();
exit;
} else {
# ACK
without matching transaction ... ignore and discard.
exit;
}
}
sl_send_reply("404","Not here");
}
exit;
}
}
Regards,
Grant