Config

route{


        if (!mf_process_maxfwd_header("10")) {
                sl_send_reply("483","Too Many Hops");
                exit;
        }


        if($ua=~"friendly-scanner"){
                drop();
        }




        if ($Ri == "192.168.88.1") {
        ### - Call from Internal Network
        ### - if $Ri is equal to the IP address set on our Internal Interface then
        ### - the SIP message came from an internal device

                route(FromInternal);

        }

        if ($Ri == "99.XX.XX.161") {
        ### - Call from External Network
        ### - if $Ri is equal to the IP address set on our Outside Interface then
        ### - the SIP message came from the internet
                if ($si == "50.XX.XX.156") {
                        ### - We want to make sure the SIP message
                        ### - came from our SIP PBX in the cloud
                        ### - so $si needs to equal our IP address

                        route(FromExternal);
                }
        }


        exit;
}

route[FromInternal] {

        if (is_method("REGISTER")){



                ### - We want to save the internal
                ### - devices contact uri so that when messages
                ### - come from the PBX we know how to route to the device
                save("irock.com","mr","$fu");
        };

        if(!is_method("REGISTER|MESSAGE")){
                        record_route();
        };


        if (has_totag()) {
                # sequential request withing a dialog should
                # take the path determined by record-routing
                if (loose_route()) {

                        if (is_method("BYE")) {
                                #setflag(1); # do accounting ...
                                #setflag(3); # ... even if the transaction fails
                        } else if (is_method("INVITE")) {
                                # even if in most of the cases is useless, do RR for
                                # re-INVITEs alos, as some buggy clients do change route set
                                # during the dialog.
                                record_route();
                        }


                        force_send_socket(99.XX.XX.161:5060);
                        t_relay("udp:50.XX.XX.156:5060");
                } else {

                        if ( is_method("ACK") ) {
                                if ( t_check_trans() ) {
                                        # non loose-route, but stateful ACK; must be an ACK after
                                        # a 487 or e.g. 404 from upstream server
                                        force_send_socket(99.XX.XX.161:5060);
                                        t_relay("udp:50.XX.XX.156:5060");
                                        exit;
                                } else {
                                        # ACK without matching transaction ->
                                        # ignore and discard
                                        exit;
                                }
                        }

                        sl_send_reply("404","Not here");
                }
                exit;
        }


        # preloaded route checking
        if (loose_route()) {
                xlog("L_ERR",
                "Attempt to route with preloaded Route's [$fu/$tu/$ru/$ci]");
                if (!is_method("ACK"))
                        sl_send_reply("403","Preload Route denied");
                exit;
        }


        lookup("irock.com");

        force_send_socket(99.XX.XX.161:5060);
        t_relay("udp:50.XX.XX.156:5060");

        exit;
}

route[FromExternal] {

        if (has_totag()) {
                # sequential request withing a dialog should
                # take the path determined by record-routing
                if (loose_route()) {
                        if (is_method("BYE")) {
                                #setflag(1); # do accounting ...
                                #setflag(3); # ... even if the transaction fails
                        } else if (is_method("INVITE")) {
                                # even if in most of the cases is useless, do RR for
                                # re-INVITEs alos, as some buggy clients do change route set
                                # during the dialog.
                                record_route();
                        }
                        # route it out to whatever destination was set by loose_route()
                        # in $du (destination URI).
                        t_relay();
                } else {

                        if ( is_method("ACK") ) {
                                if ( t_check_trans() ) {
                                        # non loose-route, but stateful ACK; must be an ACK after
                                        # a 487 or e.g. 404 from upstream server
                                        t_relay();
                                        exit;
                                } else {
                                        # ACK without matching transaction ->
                                        # ignore and discard
                                        exit;
                                }
                        }
                        sl_send_reply("404","Not here");
                }
                exit;
        }


        lookup("irock.com");

        ### - SIP message is from our SIP Proxy
        t_relay();

        exit;
}