[Serusers] ser-0.8.14 / ser-0.9 + rtpproxy + PSTN

Fri Feb 25 08:46:27 CET 2005

Hi,

Yes, this configuration allow SIP clients to call each other.

This is the updated config.

Thomas

#
# $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)

check_via=no # (cmd. line: -v)
dns=no           # (cmd. line: -r)
rev_dns=no      # (cmd. line: -R)

listen=""
port=5060
children=4
fifo_mode=0666
fifo="/tmp/ser_fifo"

# ------------------ module loading ----------------------------------

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/auth.so"
loadmodule "/usr/local/lib/ser/modules/auth_db.so"
loadmodule "/usr/local/lib/ser/modules/nathelper.so"

# ----------------- setting module-specific parameters ---------------

# -- usrloc params --

# 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)

# -- Nathelper params --
modparam("registrar", "nat_flag", 6)
modparam("nathelper", "natping_interval", 30)  # Ping interval
modparam("nathelper", "ping_nated_only", 1) # Ping only clients behind NAT

# -------------------------  request routing logic -------------------

# main routing logic

route{

# -----------------------------------------------
# Sanity Check Section
# -----------------------------------------------
 # 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;
 };

# -----------------------------------------------
# NOTIFY Keep-Alive Section
# -----------------------------------------------
 if ((method=="NOTIFY") && search("^Event: keep-alive")) {
          sl_send_reply("200","OK");
          break;
        };

 # Nathelper
 if (nat_uac_test("3")) {
  # Allow RR-ed requests, as these may indicate that
  # a NAT-enabled proxy takes care of it; unless it is
  # a REGISTER

  if (method == "REGISTER" || ! search("^Record-Route:")) {
      fix_nated_contact(); # Rewrite contact with source IP of signalling
      if (method == "INVITE") {
          fix_nated_sdp("1"); # Add direction=active to SDP
      };
      force_rport(); # Add rport parameter to topmost Via
      setflag(6);    # Mark as NATed
  };
 };

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

   save("location");
   break;
  };

  # if the dialed number lies in the range 35891500-35891799, don't forward it to T1 Trunk GW 
  if ((uri=~"^sip:(852|)358915[0-9][0-9]@") || (uri=~"^sip:(852|)358916[0-9][0-9]@") || (uri=~"^sip:(852|)358917[0-9][0-9]@")) {
   if (uri=~"^sip:852*") {
    strip(3);
   };
  };

  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
  # Call Routing Section
  if (!lookup("location")) {
   if (uri=~"^sip:(852|)[0-9]{8}@") {
    # Send to PSTN Gateway
    route(2);
    break;
   };
   sl_send_reply("404", "User Not Found");
   break;
  };
 };
 append_hf("P-hint: usrloc applied\r\n");
 route(1);

}

route[1] 
{
 # Nathelper
 if (uri=~"[@:](192\.168\.|10\.|172\.(1[6-9]|2[0-9]|3[0-1])\.)" && !search("^Route:")){
     sl_send_reply("479", "We don't forward to private IP addresses");
     break;
        };

 # if client or server know to be behind a NAT, enable relay
 if (isflagset(6)) {
     force_rtp_proxy();
 };

 # NAT processing of replies; apply to all transactions (for example,
 # re-INVITEs from public to private UA are hard to identify as
 # NATed at the moment of request processing); look at replies
 t_on_reply("1");

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

# PSTN Call to T1 Trunk GW
route[2] {
 rewritehostport("");
 if (isflagset(6)) {
  force_rtp_proxy();
 }; 
 t_on_reply("1");
 if (!t_relay()) {
  sl_reply_error();
  break;
 };
}

# !! Nathelper
onreply_route[1] {
    # NATed transaction ?
    if (isflagset(6) && status =~ "(183)|2[0-9][0-9]") {
        fix_nated_contact();

 # Not all 2xx messages have a content body so here we make sure
 # out Content-Length > 0 to avoid a parse error
 if (!search("^Content-Length:\0")) {
  force_rtp_proxy();
        };
    # otherwise, is it a transaction behind a NAT and we did not
    # know at time of request processing ? (RFC1918 contacts)
    } else if (nat_uac_test("1")) {
        fix_nated_contact();
    };
}

---------end of config -----------

  ----- Original Message ----- 
  From: Jefrey 
  To: 'support' 
  Sent: Wednesday, February 23, 2005 10:44 PM
  Subject: RE: [Serusers] ser-0.8.14 / ser-0.9 + rtpproxy + PSTN

  Hi

              Just needing some of your expertise, does this configuration allow your SIP clients to call each other?

  Regards,

  Jef.

------------------------------------------------------------------------------

  From: serusers-bounces at iptel.org [mailto:serusers-bounces at lists.iptel.org] On Behalf Of support
  Sent: Monday, February 14, 2005 5:42 PM
  To: serusers at lists.iptel.org
  Subject: [Serusers] ser-0.8.14 / ser-0.9 + rtpproxy + PSTN

  Hi,

  After studying some ser.cfg files, I could route a SIP call to PSTN gateway successfully.

  If ser receives "866+any PSTN num", ser will forward to T1 trunk gateway. T1 trunkgateway will drop the prefix 866 and route the call out to PSTN line.

  i.e. SIP client (866+PSTN num) ---> T1 Trunk Gateway (drop prefix 866) ---> PSTN call (PSTN num)

  SER version: ser-0.8.14 or ser-0.9.

  rtpproxy version: latest cvs version from berlios

  I have posted a ser.cfg in this email.

  Best Regards,

  Thomas

  #
  # $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)

  check_via=no # (cmd. line: -v)
  dns=no           # (cmd. line: -r)
  rev_dns=no      # (cmd. line: -R)

  listen=""
  port=5060
  #children=4
  fifo_mode=0666
  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"

  # 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"

  # Nathelper
  loadmodule "/usr/local/lib/ser/modules/nathelper.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)

  # -- Nathelper params --
  modparam("registrar", "nat_flag", 6)
  modparam("nathelper", "natping_interval", 30)  # Ping interval
  modparam("nathelper", "ping_nated_only", 1) # Ping only clients behind NAT

  # -------------------------  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;
   };

   # Nathelper
   if (nat_uac_test("3")) {
    # Allow RR-ed requests, as these may indicate that
    # a NAT-enabled proxy takes care of it; unless it is
    # a REGISTER

    if (method == "REGISTER" || ! search("^Record-Route:")) {
        log("LOG: Someone trying to register from private IP, rewriting\n");

        # This will work only for user agents that support symmetric
        # communication. We tested quite many of them and majority is
        # smart enough to be symmetric. In some phones it takes a configuration
        # option. With Cisco 7960, it is called NAT_Enable=Yes, with kphone it is
        # called "symmetric media" and "symmetric signalling".

        fix_nated_contact(); # Rewrite contact with source IP of signalling
        if (method == "INVITE") {
            fix_nated_sdp("1"); # Add direction=active to SDP
        };
        force_rport(); # Add rport parameter to topmost Via
        setflag(6);    # Mark as NATed
    };
   };

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

     save("location");
     break;
    };

    if (uri=~"^sip:866*") {
     log(1, "going to PSTN route\n");
     route(2);
     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] 
  {
   # !! Nathelper
   if (uri=~"[@:](192\.168\.|10\.|172\.(1[6-9]|2[0-9]|3[0-1])\.)" && !search("^Route:")){
       sl_send_reply("479", "We don't forward to private IP addresses");
       break;
          };

   # if client or server know to be behind a NAT, enable relay
   if (isflagset(6)) {
       force_rtp_proxy();
   };

   # NAT processing of replies; apply to all transactions (for example,
   # re-INVITEs from public to private UA are hard to identify as
   # NATed at the moment of request processing); look at replies
   t_on_reply("1");

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

  route[2] {
   force_rtp_proxy();
   record_route();
   t_on_reply("1");
   t_relay_to_udp("T1 gateway IP","T1 Gateway UDP port");
  }

  # !! Nathelper
  onreply_route[1] {
      # NATed transaction ?
      if (isflagset(6) && status =~ "(183)|2[0-9][0-9]") {
          fix_nated_contact();

   # Not all 2xx messages have a content body so here we make sure
   # out Content-Length > 0 to avoid a parse error
   if (!search("^Content-Length:\0")) {
    force_rtp_proxy();
          };
      # otherwise, is it a transaction behind a NAT and we did not
      # know at time of request processing ? (RFC1918 contacts)
      } else if (nat_uac_test("1")) {
          fix_nated_contact();
      };
  }

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