request_route {

    # per request initial checks
    route(REQINIT);

    # handle requests within SIP dialogs
    route(WITHINDLG);

    # record routing for dialog forming requests (in case they are routed)
    # - remove preloaded route headers
    remove_hf("Route");
    if (is_method("INVITE")) {
      record_route();
    }

    redis_cmd("redis", "GET dnis:$rU", "r");
    xdbg("***** Redis: GET dnis:$rU => $redis(r=>value)\n");
    if ($redis(r=>value) eq "") {
      sl_send_reply("404","Not here");
      exit;
    }

    $du="sip:" + $rU + "@" + $redis(r=>value);
    $rd=$redis(r=>value);
    forward();
}


# Per SIP request initial checks
route[REQINIT] {
#!ifdef WITH_ANTIFLOOD
    # flood detection from same IP and traffic ban for a while
    # be sure you exclude checking trusted peers, such as pstn gateways
    # - local host excluded (e.g., loop to self)
    if(src_ip!=myself) {
        if($sht(ipban=>$si)!=$null) {
            # ip is already blocked
            xdbg("request from blocked IP - $rm from $fu (IP:$si:$sp)\n");
            exit;
        }
        if (!pike_check_req()) {
            xlog("L_ALERT","ALERT: pike blocking $rm from $fu (IP:$si:$sp)\n");
            $sht(ipban=>$si) = 1;
            exit;
        }
    }
#!endif
    if($ua =~ "friendly-scanner|sipcli|VaxSIPUserAgent") {
        # silent drop for scanners - uncomment next line if want to reply
        # sl_send_reply("200", "OK");
        exit;
    }

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

    if(is_method("OPTIONS") && uri==myself && $rU==$null) {
        sl_send_reply("200","Keepalive");
        exit;
    }

    if(!sanity_check()) {
        xlog("Malformed SIP message from $si:$sp\n");
        exit;
    }

    if ($rU==$null) {
        # request with no Username in RURI
        sl_send_reply("484","Address Incomplete");
        exit;
    }
}


# Handle requests within SIP dialogs
route[WITHINDLG] {
    if (!has_totag()) return;

    # sequential request withing a dialog should
    # take the path determined by record-routing
    if (loose_route()) {
        if ( is_method("NOTIFY") ) {
            # Add Record-Route for in-dialog NOTIFY as per RFC 6665.
            record_route();
        }
        forward();
        exit;
    }

    if ( is_method("ACK|CANCEL") ) {
      return;
    }

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