[Serusers] UDP to TCP using SER (as conversion purpose), need ser.cfg example

[Goh Sheng Mai]

hi

i have large voip udp packets over internet problems and i need the 
transfer medium to be tcp. below is what i had in mind.

SIPp_client A (TCP out) -> (listen TCP) SER 1 (UDP out) --> Soft-switch 
(UDP in /out only) --> (to) ring Client B (listen UDP)

Client A and Client B registers to above Soft-switch. All the above are 
individual servers (Linux CentOS based)

i need help in a (conversion) ser.cfg. Can anyone post a sample ?? below 
is my ser.cfg (tried using  t_relay_to_udp(), rewritehost(), 
rewritehostport(), forward functions BUT none seems to work the way i 
want it to)

SER 1 == 192.168.10.203
Softswitch == 192.168.10.251
Client A == 192.168.10.221 or .236 (SIPp client-registered to 
soft-switch successfully)
Client B == 192.168.x.x (registered to soft-switch successfully)


Thanks
shengmai
shengmai_goh at innomedia.com.sg


#
# $Id: ser.cfg,v 1.25.2.1 2005/02/18 14:30:44 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
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/textops.so"
loadmodule "/usr/local/lib/ser/modules/print.so"
loadmodule "/usr/local/lib/ser/modules/uri.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)

# -------------------------  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 >=  2048 ) {
       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();  

   #if (method == "INVITE") {
       #    if (uri =~ "sip:*@*"){
       #        log(1, "Forwarding to Vsp12K\n");
       #        rewritehostport("192.168.10.204:5060");
       #    t_relay();
       #    break;
       #    }
    #};

       if (uri =~ "sip:*@*"){
       #log(1, "Forwarding to Vsp12K\n");
               #rewritehostport("192.168.10.204:5060");
               if (uri =~ "sip:*@192.168.10.203"){
           rewritehostport("192.168.10.251:5060");
       }
       t_relay_to_udp("192.168.10.251", "5060");
       #t_relay();
               break;
       };


   # subsequent messages withing a dialog should take the
   # path determined by record-routing
   if (loose_route()) {
       # mark routing logic in request
       append_hf("P-hint: rr-enforced\r\n");
       route(1);
       break;
   };

   if (!uri==myself) {
       # mark routing logic in request
       append_hf("P-hint: outbound\r\n");
       route(1);
       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;
       };

       lookup("aliases");
       if (!uri==myself) {
           append_hf("P-hint: outbound alias\r\n");
           route(1);
           break;
       };

       # native SIP destinations are handled using our USRLOC DB
       if (!lookup("location")) {
           sl_send_reply("404", "Not Found");
           break;
       };
   };
   append_hf("P-hint: usrloc applied\r\n");
   route(1);
}

route[1]
{
 # -----------------------------------------------------------------
 # Pass on stuff going to PSTN to Asterisk
 # -----------------------------------------------------------------
 #if (uri=~"^sip:*@.*") {
 #    rewritehostport ("*192.168.10.204:5060");
 #    if (!t_relay()) {
 #        # sl_send_reply ("403", "prout");
 #        sl_reply_error();
 #    };
 #    break;
 #};
   rewritehostport("192.168.10.204:5060");

   # send it out now; use stateful forwarding as it works reliably
   # even for UDP2TCP
   if (!t_relay()) {
       sl_reply_error();
   };
     break;
}