[Serusers] CPL-C and call forward on busy or no answer
Brinker, Oliver
Oliver.Brinker at t-systems.com
Wed May 19 17:33:35 CEST 2004
Hi Bogdan,
please find attached my ser.cfg and the CPL script for call forwarding on no answer. Could it
be a failure in my SER configuration?
Many thanks,
Oliver
--------------------------------------------------------------------------------------------
#
# $Id: ser.cfg,v 1.24 2003/11/11 15:32:36 andrei Exp $
#
# simple quick-start config script
#
# ----------- global configuration parameters ------------------------
debug=9 # debug level (cmd line: -dddddddddd)
fork=yes
log_stderror=no # (cmd line: -E)
# Uncomment these lines to enter debugging mode
#fork=no
#log_stderror=yes
check_via=no # (cmd. line: -v)
dns=no # (cmd. line: -r)
rev_dns=no # (cmd. line: -R)
#port=5060
#children=4
fifo="/tmp/ser_fifo"
# Additional Aliases
alias="t-systems.com"
# ------------------ module loading ----------------------------------
# Uncomment this if you want to use SQL database
loadmodule "/usr/local/lib/ser/modules/mysql.so"
loadmodule "/usr/local/lib/ser/modules/sl.so"
loadmodule "/usr/local/lib/ser/modules/tm.so"
loadmodule "/usr/local/lib/ser/modules/cpl-c.so"
loadmodule "/usr/local/lib/ser/modules/rr.so"
loadmodule "/usr/local/lib/ser/modules/maxfwd.so"
loadmodule "/usr/local/lib/ser/modules/usrloc.so"
loadmodule "/usr/local/lib/ser/modules/registrar.so"
loadmodule "/usr/local/lib/ser/modules/textops.so"
# Uncomment this if you want digest authentication
# mysql.so must be loaded !
loadmodule "/usr/local/lib/ser/modules/auth.so"
loadmodule "/usr/local/lib/ser/modules/auth_db.so"
# ----------------- setting module-specific parameters ---------------
# -- usrloc params --
#modparam("usrloc", "db_mode", 0)
# Uncomment this if you want to use SQL database
# for persistent storage and comment the previous line
modparam("usrloc", "db_mode", 2)
# -- auth params --
# Uncomment if you are using auth module
#
modparam("auth_db", "calculate_ha1", yes)
#
# If you set "calculate_ha1" parameter to yes (which true in this config),
# uncomment also the following parameter)
#
modparam("auth_db", "password_column", "password")
# -- rr params --
# add value to ;lr param to make some broken UAs happy
modparam("rr", "enable_full_lr", 1)
# -- cpl-c module --
modparam("cpl-c","cpl_db","mysql://ser:???@localhost/ser")
modparam("cpl-c","cpl_table","cpl")
modparam("cpl-c","cpl_dtd_file","/usr/local/etc/ser/cpl-06.dtd")
modparam("cpl-c","log_dir","/var/log/ser/cpl")
modparam("cpl-c","proxy_recurse",2)
# ------------------------- request routing logic -------------------
# main routing logic
route{
# initial sanity checks -- messages with
# max_forwards==0, or excessively long requests
if (!mf_process_maxfwd_header("10")) {
sl_send_reply("483","Too Many Hops");
break;
};
if (msg:len >= max_len ) {
sl_send_reply("513", "Message too big");
break;
};
# we record-route all messages -- to make sure that
# subsequent messages will go through our proxy; that's
# particularly good if upstream and downstream entities
# use different transport protocol
if (!method=="REGISTER") record_route();
# subsequent messages withing a dialog should take the
# path determined by record-routing
if (loose_route()) {
t_relay();
break;
};
lookup("aliases");
setflag(1);
# if the request is for other domain use UsrLoc
# (in case, it does not work, use the following command
# with proper names and addresses in it)
if (uri==myself) {
if (method=="REGISTER") {
# Uncomment this if you want to use digest authentication
if (!www_authorize("t-systems.com", "subscriber")) {
www_challenge("t-systems.com", "0");
break;
};
# handle REGISTER messages with CPL script
cpl_process_register();
save("location");
break;
};
# process INVITE
if (method=="INVITE") {
# cpl interpreter requires a pre-created transaction for the processed INVITE
if (!t_newtran()) {
# it's a retransmission
break;
};
if (!cpl_run_script("incoming")) {
# script execution failed
t_reply("500", "CPL script execution failed");
};
# we get here only if the CPL interpreter decided that server
# should follow it default behavior
# mark that there is already a created transaction for current INVITE
setflag(3);
};
# native SIP destinations are handled using our USRLOC DB
if (!lookup("location")) {
sl_send_reply("404", "Not Found");
break;
};
};
# forward current uri now
if (!isflagset(3)) {
# build a new fresh transaction and forward
if (!t_relay()) {
sl_reply_error();
};
}
else {
# transaction exists -> do just forward
if (!t_forward_nonack_uri()) {
sl_reply_error();
};
};
}
--------------------------------------------------------------------------------------------
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE cpl PUBLIC '-//IETF//DTD RFCxxxx CPL 1.0//EN' 'cpl.dtd'>
<cpl>
<incoming>
<lookup source="registration" clear="yes">
<success>
<proxy timeout="5">
<noanswer>
<location url="sip:613 at t-systems.com" clear="yes">
<proxy />
</location>
</noanswer>
</proxy>
</success>
</lookup>
</incoming>
--------------------------------------------------------------------------------------------
Bogdan-Andrei IANCU wrote
Hi Oliver,
can you send me your CPL script - it will help me to understand your
problem.
Thanks,
Bogdan
Brinker, Oliver wrote:
>Hi!
>
>I've successfully tested a handful CPL based services on SER 0.8.12 and
>most of them are working correctly. Only call forward on busy and/or no
>answer doesn't work. Enabling logging (debug=9) I get no error messages
>in the log file, but a NOTICE message that no lookup domain is given
>("cpl_init: no lookup_domain given -> disable lookup node"). It seems
>to me that all services with blocking (i.e. call screening, time of day
>screening) and direct redirection to another host (i.e. call forward
>unconditional, time of day routing) are working correctly. When SER
>first tries to reach a client before redirecting to another host (i.e.
>call forward busy or no answer) it seems that the proxy server doesn't
>returns to CPL script processing.
>
>Does anybody know a reason for this behaviour or has a correct working
>CPL implementation for call forward on busy or no answer?
>
>many thanks,
>Oliver
>
>_______________________________________________
>Serusers mailing list
>serusers at lists.iptel.org http://lists.iptel.org/mailman/listinfo/serusers
>
>
>
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