[Serusers] record_route and re-invite problem

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@192.168.1.20-------> <--------------- 100 Trying ---------------------------- -------- Invite sip:1@192.168.1.30 ---------> <-------------- 100 Trying -------------------- <------------------180 Ringing ---------------- <---------------- 180 Ringing ------------------------- <------------------ 200 OK --------------------- <---------------- 200 OK------------------------------- --------------------- ACK sip:1@192.168.1.20 à --------- Ack sip:1@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@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@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 -- Bert Berlin Director, System Test Quintum Technologies, Inc. 71 James Way Eatontown,NJ 07724 ph 732-460-9000 ext 247 # # $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(a)quintum.com alias=208.226.140.141(a)quintum.com alias=208.226.140.41(a)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; } }; }