debug=3
fork=yes
log_stderror=no

listen=192.0.2.13		# INSERT YOUR IP ADDRESS HERE
port=5060
children=4

dns=no
rev_dns=no

fifo="/tmp/ser_fifo"
fifo_db_url="mysql://ser:heslo@localhost/ser"

loadmodule "/usr/local/lib/ser/modules/mysql.so"
loadmodule "/usr/local/lib/ser/modules/sl.so"
loadmodule "/usr/local/lib/ser/modules/tm.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/auth.so"
loadmodule "/usr/local/lib/ser/modules/auth_db.so"
loadmodule "/usr/local/lib/ser/modules/uri.so"
loadmodule "/usr/local/lib/ser/modules/uri_db.so"
loadmodule "/usr/local/lib/ser/modules/mediaproxy.so"
loadmodule "/usr/local/lib/ser/modules/nathelper.so"
loadmodule "/usr/local/lib/ser/modules/textops.so"
loadmodule "/usr/local/lib/ser/modules/avpops.so"
loadmodule "/usr/local/lib/ser/modules/domain.so"
loadmodule "/usr/local/lib/ser/modules/permissions.so"

modparam("auth_db|permissions|uri_db|usrloc", 
	"db_url", "mysql://ser:heslo@localhost/ser")
modparam("auth_db", "calculate_ha1", 1)
modparam("auth_db", "password_column", "password")

modparam("nathelper", "rtpproxy_disable", 1)
modparam("nathelper", "natping_interval", 0)

modparam("mediaproxy","natping_interval", 30)
modparam("mediaproxy","mediaproxy_socket", "/var/run/mediaproxy.sock")
modparam("mediaproxy","sip_asymmetrics","/usr/local/etc/ser/sip-clients")
modparam("mediaproxy","rtp_asymmetrics","/usr/local/etc/ser/rtp-clients")

modparam("usrloc", "db_mode", 2)

modparam("registrar", "nat_flag", 6)

modparam("rr", "enable_full_lr", 1)

modparam("tm", "fr_inv_timer", 27)
modparam("tm", "fr_inv_timer_avp", "inv_timeout")

modparam("permissions", "db_mode", 1)
modparam("permissions", "trusted_table", "trusted")

route {

	# -----------------------------------------------------------------
	# Sanity Check Section
	# -----------------------------------------------------------------
	if (!mf_process_maxfwd_header("10")) {
		sl_send_reply("483", "Too Many Hops");
		break;
	};

	if (msg:len > max_len) {
		sl_send_reply("513", "Message Overflow");
		break;
	};

	# -----------------------------------------------------------------
	# Record Route Section
	# -----------------------------------------------------------------
	if (method=="INVITE" && client_nat_test("3")) {
		# INSERT YOUR IP ADDRESS HERE
		record_route_preset("192.0.2.13:5060;nat=yes");
	} else if (method!="REGISTER") {	
		record_route();	
	};

	# -----------------------------------------------------------------
	# Call Tear Down Section
	# -----------------------------------------------------------------
	if (method=="BYE" || method=="CANCEL") {
		end_media_session();
	};

	# -----------------------------------------------------------------
	# Loose Route Section
	# -----------------------------------------------------------------
	if (loose_route()) {

		if (has_totag() && (method=="INVITE" || method=="ACK")) {

			if (client_nat_test("3")||search("^Route:.*;nat=yes")){
				setflag(6);
				use_media_proxy();
			};
		};

		route(1);
		break;
	};

	# -----------------------------------------------------------------
	# Call Type Processing Section
	# -----------------------------------------------------------------

	if (uri!=myself) {
		route(5);
		route(1);
		break;
	};

	if (uri==myself) {

		if (method=="ACK") {
			route(6);
			break;
		} else if (method=="CANCEL") {
			route(3);
			break;
		} else if (method=="INVITE") {
			route(3);
			break;
		} else 	if (method=="REGISTER") {
			route(2);
			break;
		};

		lookup("aliases");
		if (uri!=myself) {
			route(5);
			route(1);
			break;
		};

		if (!lookup("location")) {
			sl_send_reply("404", "User Not Found");
			break;
		};
	};

	route(1);
}

route[1] {

	# -----------------------------------------------------------------
	# Default Message Handler
	# -----------------------------------------------------------------

	t_on_reply("1");

	if (!t_relay()) {

		if (method=="INVITE" || method=="ACK") {
			end_media_session();
		};

		sl_reply_error();
	};
}

route[2] {

	# -----------------------------------------------------------------
	# REGISTER Message Handler
	# -----------------------------------------------------------------

	sl_send_reply("100", "Trying");

	if (!search("^Contact:\ +\*") && client_nat_test("7")) {
		setflag(6);
		fix_nated_register();
		force_rport();
	};

	if (!www_authorize("","subscriber")) {
		www_challenge("","0");
		break;
	};

	if (!check_to()) {
		sl_send_reply("401", "Unauthorized");
		break;
	};

	consume_credentials();

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

route[3] {

	# -----------------------------------------------------------------
	# CANCEL and INVITE Message Handler
	# -----------------------------------------------------------------

	if (client_nat_test("3")) {
		setflag(7);
		force_rport();
		fix_nated_contact();
	};

	if (method=="INVITE" && !allow_trusted()) {

		if (!proxy_authorize("","subscriber")) {
			proxy_challenge("","0");
			break;
		} else if (!check_from()) {
			sl_send_reply("403", "Use From=ID");
			break;
		};

		consume_credentials();
	};

	lookup("aliases");
	if (uri!=myself) {
		route(5);
		route(1);
		break;
	};

	if (uri=~"^sip:011[0-9]*@") {		# International PSTN
		route(4);
		break;
	};

	if (!lookup("location")) {

		if (uri=~"^sip:[0-9]{10}@") {	# Domestic PSTN
			route(4);
			break;
		};

		sl_send_reply("404", "User Not Found");
		break;
	};

	if (method=="CANCEL") {
		route(1);
		break;
	};

	route(5);
	route(1);
}

route[4] {

	# -----------------------------------------------------------------
	# PSTN Handler
	# -----------------------------------------------------------------

	rewritehost("192.0.2.245"); # INSERT YOUR PSTN GATEWAY IP ADDRESS

	avp_write("i:45", "inv_timeout");

	route(5);
	route(1);
}

route[5] {

	# -----------------------------------------------------------------
	# RTP Proxy Enabler
	# -----------------------------------------------------------------

	if (isflagset(6) || isflagset(7)) {
		use_media_proxy();
	};
}

route[6] {

	# ------------------------------------------------------------------------
	# ACK Handler
	# ------------------------------------------------------------------------

	# ------------------------------------------------------------------------
	# Aliases Section
	# ------------------------------------------------------------------------
	lookup("aliases");
	if (uri!=myself) {
		route(5);
		route(1);
		break;
	};

	lookup("location");

	route(1);
}


onreply_route[1] {

	if ((isflagset(6) || isflagset(7)) && 
	    (status=~"(180)|(183)|2[0-9][0-9]")) {

		if (!search("^Content-Length:\ +0")) {
			use_media_proxy();
		};
	};

	if (client_nat_test("1")) {
		fix_nated_contact();
	};
}