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

25 Feb 2008

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(a)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;
}