Maria,
I implemented this using avpops. Subscribers enable/disable call forwarding, forward busy, forward
no answer via a rows in usr_preferences which avpops reads before routing the call.
If a "forward xxxx" setting is enabled then the on_failure[] route kicks in and uses avp_pushto()
in order to get the next appropriate destination as specified by the forwarding settings.
Here is a snippet from my ser.cfg. It took quite a bit of work to get all the forwarding stuff
working because I needed to make sure that users couldn't forward to "invalid" destinations such
as 411 or international (if they weren't in the "int" group) or even to the PSTN if they weren't
in the free-pstn group.
Regards,
Paul
modparam("avpops", "avp_url", "mysql://ser:heslo@localhost/ser")
modparam("avpops", "avp_table", "usr_preferences")
modparam("avpops", "avp_aliases",
"voicemail=i:500;calltype=i:700;fwd_no_answer_type=i:701;fwd_busy_type=i:702")
route {
.. All the ususal stuff
lookup("aliases");
...blah blah
if (!lookup("location")) {
..more blah blah
};
# ------------------------------------------------------------------------
# Call Forwarding Section
# ------------------------------------------------------------------------
if (method=="INVITE") {
# here we must store the current (aka original) R-URI because if
# we set call forwarding and the forwarded number is busy then we
# need to use this original R-URI to determine which voicemail
# box we should go to
#
# flag 31 means they are in the "voicemail" group (ie, they have
# voicemail enabled)
if (isflagset(31)) {
avp_write("$ruri", "$voicemail");
};
if (avp_db_load("$ruri/username", "s:callfwd")) {
avp_pushto("$ruri", "s:callfwd");
# lookup the call fowarding number to see if it is a served
# sip number or a PSTN number
# check forwarding number rules
route(1);
if (avp_check("$calltype", "eq/-/i")) {
sl_send_reply("503", "Service Unavailable");
break;
};
# test for domestic PSTN gateway
if (avp_check("$calltype", "eq/dom/i")) {
route(3);
break;
};
# test for international PSTN gateway
if (avp_check("$calltype", "eq/int/i")) {
route(6);
break;
};
} else {
# save R-URI in a temp AVP for later use
avp_write("$ruri", "i:99");
# only load the forward no answer option if voice mail is not enabled
if (!isflagset(31)) {
if (avp_db_load("$ruri/username", "s:fwdnoanswer")) {
route(1);
if (!avp_check("$calltype", "eq/-/i")) {
if (avp_check("$calltype", "eq/dom/i")) {
avp_write("dom", "$fwd_no_answer_type");
} else if (avp_check("$calltype", "eq/int/i")) {
avp_write("int", "$fwd_no_answer_type");
} else {
avp_write("sip", "$fwd_no_answer_type");
}
setflag(27);
};
};
};
if (avp_db_load("$ruri/username", "s:fwdbusy")) {
route(1);
if (!avp_check("$calltype", "eq/-/i")) {
if (avp_check("$calltype", "eq/dom/i")) {
avp_write("dom", "$fwd_busy_type");
} else if (avp_check("$calltype", "eq/int/i")) {
avp_write("int", "$fwd_busy_type");
} else {
avp_write("sip", "$fwd_busy_type");
}
setflag(26);
};
};
avp_pushto("$ruri", "i:99");
};
};
# route as normal
... blah blah blah
t_on_failure("1");
... relay the message now with t_relay();
}
route[1] {
# Here we have route checks for all the call forwarding stuff. The return
# values are passed as AVP $calltype as follows:
#
# "-" = R-URI is not allowed
# "dom" = R-RURI is a domestic call
# "int" = R-RURI is an international call
# "sip" = R-RURI is a sip call
#
# I use AVPs to return values from this "function"
avp_write("-", "$calltype");
if (uri=~"^sip:1[0-9]{10}@") {
strip(1);
};
# deny **ALL** access to forwarding to 411, 911, 900, and 976 numbers
if ((uri=~"^sip:411 at .*") || (uri=~"^sip:911 at .*") ||
(uri=~"^sip:900[0-9]{7}@") || (uri=~"^sip:976[0-9]{7}@")) {
break;
};
lookup("aliases");
if (!lookup("location")) {
if (uri=~"^sip:[0-9]{10}@") {
# test for domestic PSTN number
# flag 28 means they are in the
"free-pstn" group
if (isflagset(28)) {
avp_write("dom", "$calltype");
};
} else if (uri=~"^sip:011[0-9]*@") {
# test for international PSTN number
# flag 29 means they are in the
"int" group
if (isflagset(29)) {
avp_write("int", "$calltype");
};
};
break;
};
avp_write("sip", "$calltype");
}
failure_route[1] {
# if caller hung up then don't sent to voicemail
if (t_check_status("487")) {
break;
};
# flag 26 means that a "forward busy" number is set
if (isflagset(26) && t_check_status("486")) {
# forward busy is flag 26
if (avp_pushto("$ruri", "s:fwdbusy")) {
avp_delete("s:fwdbusy");
append_branch();
resetflag(26);
# test for domestic PSTN gateway
if (avp_check("$fwd_busy_type", "eq/dom/i")) {
# test for domestic PSTN gateway
route(3);
} else if (avp_check("$fwd_busy_type", "eq/int/i")) {
# test for international PSTN gateway
route(6);
} else {
# default to sip call
route(2);
};
break;
};
};
# here we can have either voicemail __OR__ forward no answer
# flag 27 means that a "forward no answer" number is set
# NOTE: "forward no answer" only applies to users that __DO NOT__
# have voicemail enabled
if (isflagset(27) && t_check_status("408")) {
# forward no answer is flag 27
if (avp_pushto("$ruri", "s:fwdnoanswer")) {
avp_delete("s:fwdnoanswer");
append_branch();
resetflag(27);
if (avp_check("$fwd_no_answer_type", "eq/dom/i")) {
# test for domestic PSTN gateway
route(3);
} else if (avp_check("$fwd_no_answer_type", "eq/int/i")) {
# test for international PSTN gateway
route(6);
} else {
# default to sip call
route(2);
break;
};
} else if (isflagset(31) && avp_pushto("$ruri", "$voicemail")) {
# flag 31 means the user has voicemail enabled
avp_delete("$voicemail");
# send to the voicemail server
route(4);
break;
};
}
--- Maria Yndefors <Maria.Yndefors at bredband.com> wrote:
> Hi,
>
> Is it possible to configure SER to forward calls that are busy only for subscribers that have
> ordered the service?
> I can't see that subscriber's forwarding information is stored in the database.
>
> Also does SER support privacy standards: RFC 3323, RFC 3325?
>
>
> Regards
> /Maria
>
> _______________________________________________
> Serusers mailing list
> serusers at lists.iptel.org
> http://lists.iptel.org/mailman/listinfo/serusers
>
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