opensips.cfg_logic

 route{

        route("SANITY_CHECKS");
        route("MATCH_DIALOG");
        $avp(server_ip)="XXX.XXX.X.XXX";
        $avp(term-ip) = $Ri;
        $avp(source-ip)= $si;    #source ip address of message

        $avp(source-port)=$sp;  # source port of message
        $avp(src_ipz_ip) = $Ri;
        $avp(dest-ip)=$od;
        $avp(dest-port)=$op;
        $avp(dst_type) = "CARRIER";
        $avp(use-rtpproxy)="YES";
        $avp(ruri)=$rU;            #username in request URI

        xlog("L_INFO","[$time(%Y-%m-%d %H:%M:%S)] Incoming Request CI:$ci RM:$rm FU:$fU TU:$tU SI:$avp(source-ip) SP:$avp(source-port) PC:$proto TE:$avp(term-ip) \n");

        if(method=="INVITE") {
                route("PROCESS_INVITE");
        } else if(method=="CANCEL") {
                route("PROCESS_CANCEL");
        } else if(method=="ACK") {
                route("PROCESS_ACK");
        } else if(method=="OPTIONS") {
                route("PROCESS_OPTIONS");
        } else if(method=="REGISTER"){
                route("PROCESS_REGISTER");
        } else {
                sl_send_reply("501", "Method is not implemented"); ### From here that funny 501 is coming....
        }
        exit;
}

route[PROCESS_INVITE] {

        route("SETCDR");
        if(t_check_trans()) {
                drop();
        }
        route("CHECK_NAT");
        create_dialog();
        do_accounting("aaa","cdr|failed");
        route("REALY_ROUTE");
        exit;
}

route[RELAY_ROUTE] {
        if(is_method("INVITE|UPDATE")) {
        xlog("L_INFO","CI:$ci In Relay Route RU:$ru DU:$du Tu:$tu TU:$tU CT:$ct\n");
                if(!has_totag() && is_method("INVITE") && !isflagset(15)) {
                        xlog("L_INFO","CI:$ci Topology_Hiding Call\n");
                        setflag(15);
                        topology_hiding("UC");
#                       record_route();


                }
                if($avp(use-rtpproxy)=="YES") {
                        route(PROCESS_RTPPROXY_OFFER);
                }
                xlog("L_INFO","CI:$ci Routing Call IP:$avp(dest-ip) PORT:$avp(dest-port)\n");

                $avp(call_status)="Failed";
                t_on_branch("DEFAULT_BRANCH_ROUTE");
                t_on_reply("DEFAULT_REPLY_ROUTE");
        }

                xlog("L_INFO","DAILOG STATUS::::  $DLG_end_reason $DLG_did      $DLG_status $DLG_count\n");

#       record_route();
        if (!t_relay()) {
                sl_reply_error();
        }
        exit;
}

route[MATCH_DIALOG] {

        xlog("L_INFO",":::::DAILOG STATUS:::: $rm: $DLG_end_reason $DLG_did     $DLG_status $DLG_count\n"); #HERE I AM GETTING most values null
        if(has_totag() && is_method("INVITE|ACK|BYE|UPDATE|REFER|PRACK|INFO") ) {
                xlog("L_INFO","INSIDE MATCH_DIALOG :::: $rm\n");
#               loose_route();
                xlog(" found match request to a dialog \n");
                if(topology_hiding_match()) {                    #THIS CONDITIONS FAILS FOR ALL REQUESTS
                        if(is_method("BYE")) {
                                rtpproxy_unforce();
                        }
                        route("RELAY_ROUTE");
                }
        }
}

route[PROCESS_ACK] {
        xlog("L_INFO","IN PROCESS ACK\n");
    if(t_check_trans()) {
                t_relay();
        }
        exit;
}