[Serusers] CPL-C and call forward on busy or no answer

[Brinker, Oliver]

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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