[Serusers] Fork
Kapil Dhawan
sersavvy at hotmail.com
Tue May 4 09:41:12 CEST 2004
Yeah first is solved...
Second is if i have three users 111 222 333...111 called up 222 and they are
talking with the beloew mentioned NAT file (as ser.cfg) if i make a call
from 333 to 111 or 333 to 222.....both parties get RING.......if 333 called
up 111 then 333 and 111 will get ring as if 111 is not busy......
>From: Jiri Kuthan <jiri at iptel.org>
>To: "Kapil Dhawan" <sersavvy at hotmail.com>, serusers at lists.iptel.org
>Subject: Re: [Serusers] Fork
>Date: Tue, 04 May 2004 09:32:01 +0200
>
>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();
> > };
> >}
> >
> >_________________________________________________________________
> >Send flowers in 24 hours!
> >http://www.fabmall.com/affiliatehtml/redir/nl7.asp At MSN Shopping.
> >
> >_______________________________________________
> >Serusers mailing list
> >serusers at lists.iptel.org
> >http://lists.iptel.org/mailman/listinfo/serusers
>
>--
>Jiri Kuthan http://iptel.org/~jiri/
>
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