[Serusers] Call accounting with NAT problem

The problem that I am facing is about accounting missed calls. When I try to turn the missed calls module On by putting in the following chunk of code the missed calls are reported, but the Nating module somehow gets disabled and the RTP tries to go through directly. The scenario can be realized as Phone 1 <----------(SER)------------>Phone 2 Private IP Global IP Private IP Now as we can see the ser is on global IP and the phones are local. When there is no missed calls chunk of code in SER.cfg then SER works fine and phone1 first sends RTP to global IP SER and it forwards it to the other phone 2 . But when I insert the code then SER tries to make them direct and this is not possible as both phones are behind different NATs. My ser.cfg file is given below ...I have seaparated that piece of code by marking aswell as u can see below .. Can someone please tell me what's wrong ??? I am using SER development version downloaded from CVS. # # simple quick-start config script # # ----------- global configuration parameters ------------------------ debug=9 # debug level (cmd line: -dddddddddd) fork=yes log_stderror=yes #listen=202.83.___.___ #alias=202.83.___.___ 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" #change loadmodule "/usr/local/lib/ser/modules/acc.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/nathelper.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" #loadmodule "/usr/local/lib/ser/modules/group.so" # ----------------- setting module-specific parameters --------------- # -- usrloc params -- #modparam("usrloc", "db_mode", 0) modparam("auth_db", "db_url", "mysql://ser:heslo@localhost/ser") modparam("usrloc", "db_url", "mysql://ser:heslo@localhost/ser") #change modparam("acc", "db_url", "mysql://ser:heslo@localhost/ser") #change modparam("acc","log_level",1) modparam("acc","log_flag",1) modparam("acc","db_flag",2) modparam("acc","log_missed_flag",3) modparam("acc","db_missed_flag",3) # 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) # ------------------------- request routing logic ------------------- # We will you flag 6 to mark NATed contacts modparam("registrar", "nat_flag", 6) # Enable NAT pinging modparam("nathelper", "natping_interval", 10) # Ping only contacts that are known to be # behind NAT modparam("nathelper", "ping_nated_only", 1) # main routing logic route{ # initial sanity checks -- messages with # max_forwards==0, or excessively long requests if (!mf_process_maxfwd_header("10")) { #change log("LOG: Too many hops\n"); sl_send_reply("483","Too Many Hops"); break; }; if (msg:len >= max_len ) { sl_send_reply("513", "Message too big"); break; }; # 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 used); also, # the received test should, if complete, should check all # vias for presence of received if (nat_uac_test("2")) { # 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 smart enough to be symmetric. In some phones, like # it takes a configuration option. With Cisco 7960, it is # called NAT_Enable=Yes, with kphone it is called # "symmetric media" and "symmetric signaling". (The latter # not part of public released yet.) 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 }; }; #change if(loose_route()) { t_relay(); break; }; setflag(1); setflag(2); # 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(); #change if (method == "INVITE") 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("203.82.___.___", "subscriber")) { www_challenge("203.82.___.___", "0"); break; }; save("location"); break; }; ######################################################################################## #used for missed calls if(!lookup("location")) { if( (method=="INVITE" || method=="ACK") && t_newtran() ) { t_reply("404","Not Found"); #acc_request("404 Not Found"); log("entered if loop 1 \n " ); break; }; sl_send_reply("404","Not Found"); break; } else { setflag(3); log("entered if loop 2 \n"); t_relay(); break; }; ########################################################################################## if (uri=~"^sip:([0789]|33).*@") { forward(203.82.___.___,5070); break; } else { 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); } # # Forcing media relay if necessary # route[1] { # if (uri=~"[@:](192\.168\.|10\.|172\.16)" && !search("^Route:")){ # sl_send_reply("479", "We don't forward to private IP addresses"); # break; # }; if (isflagset(6)) { force_rtp_proxy(); t_on_reply("1"); append_hf("P-Behind-NAT: Yes\r\n"); }; if (!t_relay()) { sl_reply_error(); break; }; } onreply_route[1] { if (status =~ "(183)|2[0-9][0-9]") { fix_nated_contact(); force_rtp_proxy(); }; } #route[1] #{ # # send it out now; use stateful forwarding as it works reliably # # even for UDP2TCP # if (!t_relay()) { # sl_reply_error(); # }; #} __________________________________ Do you Yahoo!? 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