route{
        if($ua =~ "friendly-scanner"){
                # estamos identificando o tipo de ataque baseado no user agente e saindo sem resposta
                # neste caso a tendencia é que ele para de tentar
                xlog("L_NOTICE", "Auth error for $fU@$fd from $si cause -1");
                xlog("FRIENDLY-SCANNER: UA: $ua From_TAG: $ft From_URI: $fu Received IP: $Ri IP SOURCE: $si");
                exit;
        }

	force_rport();
	if (nat_uac_test("23")) {
		if (is_method("REGISTER")) {
			fix_nated_register();
			setbflag(NAT);
		} else {
			fix_nated_contact();
			setflag(NAT);
		}
	}


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

        if(method=="OPTIONS"){
                sl_send_reply("200", "OK");
                exit;
        }

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

			# validate the sequential request against dialog
			if ( $DLG_status!=NULL && !validate_dialog() ) {
				xlog("In-Dialog $rm from $si (callid=$ci) is not valid according to dialog\n");
				## exit;
			}

			if (is_method("BYE")) {
				setflag(ACC_DO); # do accounting ...
				setflag(ACC_FAILED); # ... 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();
			}

			if (check_route_param("nat=yes"))
				setflag(NAT);

			# route it out to whatever destination was set by loose_route()
			# in $du (destination URI).
			route(relay);
		} else {
			if (is_method("SUBSCRIBE") && $rd == "127.0.0.1:5060") { # CUSTOMIZE ME
				# in-dialog subscribe requests
				route(handle_presence);
				exit;
			}
			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;
	}

	# CANCEL processing
	if (is_method("CANCEL"))
	{
		if (t_check_trans())
			t_relay();
		exit;
	}

	t_check_trans();

	if ( !(is_method("REGISTER") && is_from_local()) ) {


			# authenticate if from local subscriber
			# authenticate all initial non-REGISTER request that pretend to be
			# generated by local subscriber (domain from FROM URI is local)
			if (!proxy_authorize("", "subscriber")) {
				proxy_challenge("", "0");
				exit;
			}
			if (!db_check_from()) {
				sl_send_reply("403","Forbidden auth ID");
				exit;
			}

			consume_credentials();
			# caller authenticated

		} else {
			# if caller is not local, then called number must be local

			if (!is_uri_host_local()) {
				send_reply("403","Rely forbidden");
				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;
	}

	# record routing
	if (!is_method("REGISTER|MESSAGE"))
		record_route();

	# account only INVITEs
	if (is_method("INVITE")) {

		# create dialog with timeout
		if ( !create_dialog("B") ) {
			send_reply("500","Internal Server Error");
			exit;
		}

		setflag(ACC_DO); # do accounting
	}


	if (!is_uri_host_local()) {
		append_hf("P-hint: outbound\r\n");

		route(relay);
	}

	# requests for my domain

	if( is_method("PUBLISH|SUBSCRIBE"))
			route(handle_presence);

	if (!is_method("REGISTER"))
		record_route();

	if (is_method("REGISTER"))
	{

		# authenticate the REGISTER requests
		if (!www_authorize("", "subscriber"))
		{
			www_challenge("", "0");
			exit;
		}

		if (!db_check_to())
		{
			sl_send_reply("403","Forbidden auth ID");
			exit;
		}

		if (   0 ) setflag(TCP_PERSISTENT);

		if (!save("location"))
			sl_reply_error();

		exit;
	}

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


	if ($rU=~"^0+") {

		$rd="10.1.1.247";
		$rp=5060;
		route(relay);
		exit;
	}


	# do lookup with method filtering
	if (!lookup("location","m")) {
		if (!db_does_uri_exist()) {
			send_reply("420","Bad Extension");
			exit;
		}

		t_newtran();
		t_reply("404", "Not Found");
		exit;
	}

	if (isbflagset(NAT)) setflag(NAT);

	# when routing via usrloc, log the missed calls also
	setflag(ACC_MISSED);
	route(relay);
}


route[relay] {
	# for INVITEs enable some additional helper routes
	if (is_method("INVITE")) {

		if (isflagset(NAT)) {
			rtpproxy_offer("ro");
		}

		t_on_branch("per_branch_ops");
		t_on_reply("handle_nat");
		t_on_failure("missed_call");
	}

	if (isflagset(NAT)) {
		add_rr_param(";nat=yes");
		}

	if (!t_relay()) {
		send_reply("500","Internal Error");
	};
	exit;
}


# Presence route
route[handle_presence]
{
	if (!t_newtran())
	{
		sl_reply_error();
		exit;
	}

	if(is_method("PUBLISH"))
	{
		handle_publish();
	}
	else
	if( is_method("SUBSCRIBE"))
	{
		handle_subscribe();
	}

	exit;
}


branch_route[per_branch_ops] {
	xlog("new branch at $ru\n");
}


onreply_route[handle_nat] {
	if (nat_uac_test("1"))
		fix_nated_contact();
	if ( isflagset(NAT) )
		rtpproxy_answer("ro");
	xlog("incoming reply\n");
}


failure_route[missed_call] {
	if (t_was_cancelled()) {
		exit;
	}

	# uncomment the following lines if you want to block client
	# redirect based on 3xx replies.
	##if (t_check_status("3[0-9][0-9]")) {
	##t_reply("404","Not found");
	##	exit;
	##}


}



local_route {
	if (is_method("BYE") && $DLG_dir=="UPSTREAM") {

		acc_db_request("200 Dialog Timeout", "acc");

	}
}