At 09:29 AM 5/4/2004, Kapil Dhawan wrote:

Hi

I am using the stable version of SER and rtpproxy....it is working fine as such and i am able to get phones registered.....and can make calls....Now....if i use fork=no with the same file....SER is unable to process Register Requests...

so set fork=yes

it does nothin for a register request...it just doesn't respond but for fork=yes it works correctly....i know fork is used to fork the request to more than one locations..

the config option 'fork' is unrelated to SIP forking, it is a debugging mode in which children processes are nto forked.

-jiri

Could u pls clarify it....

Second...i am using two grandstream phones and i can talk....but if i make a call from third phone to any of two..instead of busy tone...i get Ring...on the caller as well as callee side.... following is my ser.cfg

# # $Id: nathelper.cfg,v 1.1.2.1 2003/11/24 14:47:18 janakj Exp $ # # simple quick-start config script including nathelper support

# This default script includes nathelper support. To make it work # you will also have to install Maxim's RTP proxy. The proxy is enforced # if one of the parties is behind a NAT. # # If you have an endpoing in the public internet which is known to # support symmetric RTP (Cisco PSTN gateway or voicemail, for example), # then you don't have to force RTP proxy. If you don't want to enforce # RTP proxy for some destinations than simply use t_relay() instead of # route(1) # # Sections marked with !! Nathelper contain modifications for nathelper # # NOTE !! This config is EXPERIMENTAL ! # # ----------- 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"

# 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 modparam("registrar", "nat_flag", 6) modparam("nathelper", "natping_interval", 30) # Ping interval 30 s 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
   # Special handling for NATed clients; first, NAT test is
   # executed: it looks for via!=received and RFC1918 addresses
   # in Contact (may fail if line-folding is used); also,
   # the received test should, if completed, should check all
   # vias for rpesence of received
   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("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] { # !! 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();
   };

}

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