[Serusers] record_route and re-invite problem
Klaus Darilion
klaus.mailinglists at pernau.at
Wed Jul 7 12:20:08 CEST 2004
The re-INVITE looks correct to me. Add logging info like
log(1,"Message enters main route...);
to your routing script andwatch the logging output in syslog. On some
point the INVITE message must be lost.
You should also add a loose_route() block to your ser.cfg
klaus
bert berlin wrote:
> Below is a call flow for a situation that fails -
> I have attached the ser.cfg file, and two ethereal sniffs - these are
> for fax call attempts - one with record_route commented out (which
> succeeds) , and one with record_route(), which fails. Note that in the
> failure case, with record_route(), the re-invite from 208.226.140.40
> gets to the proxy at 208.226.140.141, but the proxy never sends that to
> the origination UA, 208.226.140.142.
>
> The fax case looks nearly identical to the call flow below, which was
> taken from a call attempt with a SIP phone placed on hold.
>
> From TRT --
> We are having a problem with a Re-Invite between and endpoint and the
> SER proxy. The call flow is:
>
>
>
>
>
> Assumptions: Record route turned on in Proxy
>
>
>
>
>
> UA-Orig
> Proxy UA-Term
>
> 192.168.1.10
> 192.168.1.20 192.168.1.30
>
>
>
> ------------------Invite sip:1 at 192.168.1.20------->
>
> <--------------- 100 Trying ----------------------------
>
> --------
> Invite sip:1 at 192.168.1.30 --------->
>
>
> <-------------- 100 Trying --------------------
>
>
> <------------------180 Ringing ----------------
>
> <---------------- 180 Ringing -------------------------
>
>
> <------------------ 200 OK ---------------------
>
> <---------------- 200 OK-------------------------------
>
> --------------------- ACK sip:1 at 192.168.1.20 à
>
> ---------
> Ack sip:1 at 192.168.1.30 ------>
>
>
>
> ******** Call is connected and voice path is established
> *************************
>
> ******** Termination puts call on hold and sends NULL SDP via Re-Invite
> ******
>
>
>
> <--------
> Invite sip:1 at 192.168.1.20-------
>
> ** Note: to and from tags are set correctly, call id is same as original
> Invite, Sequence incremented
>
> ----------
> 100 Trying ------------------------->
>
> ----------
> Invite sip:1 at 192.168.1.30 -------->
>
> ** Invite is being sent back to termination. It is not identifying this
> call as an existing call in the proxy.
>
>
>
>
>
>
>
> TRT
>
>
> ------------------------------------------------------------------------
>
> #
> # $Id: ser.cfg,v 1.21.4.1 2003/11/10 15:35:15 andrei Exp $
> #
> # simple quick-start config script
> # Uses proxy registrar to route call, so won't work unless UA is registered.
> #
>
> # ----------- global configuration parameters ------------------------
>
> debug=8 # debug level (cmd line: -dddddddddd)
> fork=yes
> log_stderror=yes # (cmd line: -E)
>
> /* Uncomment these lines to enter debugging mode */
> fifo="/tmp/ser_fifo"
> sip_warning=yes
>
>
> check_via=yes # (cmd. line: -v)
> dns=yes # (cmd. line: -r)
> rev_dns=yes # (cmd. line: -R)
> listen=208.226.140.141
> port=5060
> listen=208.226.140.141
> port=5000
> listen=208.226.140.141
> port=5061
> listen=208.226.140.141
> port=6000
> children=4
> fifo="/tmp/ser_fifo"
>
> # ------------------ module loading ----------------------------------
>
> # Uncomment this if you want to use SQL database
> loadmodule "/usr/lib/ser/modules/mysql.so"
>
> loadmodule "/usr/lib/ser/modules/sl.so"
> loadmodule "/usr/lib/ser/modules/tm.so"
> loadmodule "/usr/lib/ser/modules/rr.so"
> loadmodule "/usr/lib/ser/modules/maxfwd.so"
> loadmodule "/usr/lib/ser/modules/usrloc.so"
> loadmodule "/usr/lib/ser/modules/registrar.so"
>
> # Uncomment this if you want digest authentication
> # mysql.so must be loaded !
> loadmodule "/usr/lib/ser/modules/auth.so"
> loadmodule "/usr/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)
> modparam("registrar", "default_expires", 120) #sets default for expiry if registrant doesn't specify
> modparam("registrar", "default_q", 1000)# sets default q value in registration
> # ------------------------- request routing logic -------------------
> alias=quintum.com
> alias=208.226.140.141
> alias=208.226.140.41
> alias=engweb at quintum.com
> alias=208.226.140.141 at quintum.com
> alias=208.226.140.41 at quintum.com
>
> # 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;
> };
>
>
>
> ############################################
>
> # store user location if a REGISTER appears
> if (method=="REGISTER") {
> save("location");
> break;
> };
>
>
> if (uri==myself) #where myself is defined by the aliases above
> {
> #look for the registered contact in the location table of database
> #and if find it, rewrite the uri and forward statefully to the destination
> if (lookup ("location"))##Lookup finds the contact info and rewrites the header
> {
> record_route();#send everything back through the proxy
> t_relay();
> break;
> }
> else
> {
> sl_send_reply("404","user not found");#and if you really don't know what to do, send this back
> break;
> }
> };
>
>
> }
>
>
> ------------------------------------------------------------------------
>
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