Hi all,
Opensips 1.11 here. I've tried implementing max concurrent calls
limitation for some of our users, inspired by tutorial found at
https://www.opensips.org/Documentation/Tutorials-ConcurrentCallsLimitation
and using AVP to set per-account calls limit.
In table usr_preferences i've a row like:
id
uuid
username
domain
attribute
type
value
1298
6911
voip.xxxx.it
maxcalls
0
1
and on dialplan i've:
#### AVP module
loadmodule "avpops.so"
modparam("avpops","db_url","mysql://voip:7PDzZ2ADNxZzmzfA@192.168.1.1/opensips")
modparam("avpops","avp_table","usr_preferences")
modparam("avpops","uuid_column", "uuid")
modparam("avpops","use_domain",0)
modparam("avpops","domain_column","domain")
modparam("avpops","attribute_column","attribute")
modparam("avpops","value_column","value")
modparam("avpops","type_column","type")
...
route() {
[...]
if (is_method("INVITE")) {
set_dlg_profile("caller", "$ru");
get_profile_size("caller", "$ru", "$var(size)");
## <-- CONCURRENT CALLS LIMIT BASED ON DESTINATION
if(avp_db_load("$ru/username","$avp(maxcalls)")) {
if($var(size) > $avp(maxcalls)) {
xlog("L_INFO","$ci - User $rU has $var(size) calls (max
$avp(maxcalls) calls): BUSY\n");
sl_send_reply("486", "Busy: try later");
exit;
} else {
xlog("L_INFO","$ci - User $rU has $var(size) calls (max
$avp(maxcalls) calls): ALLOW\n");
}
}
[...]
}
This way seems to work perfectly except when calls come from our
mediagateways, that append port to signals, like (captured with sngrep):
INVITE 333xxxx@172.20.1.4:506 5...@voip.xxxx.it:5060 28
172.20.1.4:5060 193.xxxxxxx:5060 REJECTED 28ad94e804782466
0:10
INVITE 5...@voip.xxxx.it 5...@voip.xxx.it 20
193.205.4.182:5060 193.xxxxxxx:5060 CANCELLED
455244b218fec81c1f90036f3890a...@voip.xxx.it 0:05
INVITE 3527@172.20.1.4:5060 2...@voip.xxx.it:5060 20
172.20.1.4:5060 193.xxxxxxx:5060 COMPLETED 7758dace18b36325
I suppose, but maybe i'm wrong, that the problem is the domain part of
the RURI that were not correctly matched in dialog profile.
Any hint or help kindly appreciated
--
Michele Pinassi - Responsabile Cybersecurity Università di Siena
Ufficio Esercizio e Tecnologie - CSIRT
i...@unisi.it
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