[Serusers] Proxy Problem Using CPL

[Rohit Mutsuddi]

Hello All

I am having a problem using the "forward-on-busy" option using CPL. The following error occurs when an invite is sent. CPL script getrs loaded properly using serctl but at runtime it does not work

"ERROR: t_reply: cannot send a t_reply to a message for which no T-state has been established"

My config file is

# $Id: ser.cfg,v 1.21.4.1 2003/11/10 15:35:15 andrei Exp $
#
# simple quick-start config script
#

# ----------- global configuration parameters ------------------------

#debug=3         # debug level (cmd line: -dddddddddd)
#fork=yes
#log_stderror=no # (cmd line: -E)

#Uncomment these lines to enter debugging mode
debug=7
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"

# ------------------ 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/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/cpl-c.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)

#modparam("usrloc","db_url","mysql://root:root@localhost/ser")


modparam("cpl-c","cpl_db","mysql://ser:heslo@localhost/ser")
modparam("cpl-c","cpl_table","cpl")
modparam("cpl-c","cpl_dtd_file","/etc/ser/cpl-06.dtd")


# -- 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)

# -------------------------  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
 record_route();
 # loose-route processing
 if (loose_route()) {
  t_relay();
  break;
 };

 # 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("iptel.org", "subscriber")) {
#    www_challenge("iptel.org", "0");
#    break;
#   };

   save("location");
   break;
  };
 
  if (method=="INVITE") {
 
   cpl_run_script("incoming","force_stateful");
  };

  # native SIP destinations are handled using our USRLOC DB
  if (!lookup("location")) {
   sl_send_reply("404", "Not Found");
   break;
  };
 };
 # forward to current uri now; use stateful forwarding; that
 # works reliably even if we forward from TCP to UDP
 if (!t_relay()) {
  sl_reply_error();
 };

}



Also here is my sample CPL XML file



<?xml version="1.0" encoding="UTF-8"?>

<cpl xmlns="urn:ietf:params:xml:ns:cpl"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="urn:ietf:params:xml:ns:cpl cpl.xsd ">

<subaction id="voicemail">

<location url="sip:jones at voicemail.example.com">

<proxy/>

</location>

</subaction>

<incoming>

<location url="sip:jones at jonespc.example.com">

<proxy timeout="8">

<busy>

<sub ref="voicemail"/>

</busy>

<noanswer>

<sub ref="voicemail"/>

</noanswer>

</proxy>

</location>

</incoming>

</cpl>





Regards
Rohit


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