[Serusers] about SER+nathelper+rtpproxy

[gcc chentob]

Hello ,
      I have installed  the SER-0.9.0 +nathelper+rtpproxy,it can let the the 
SER through the nat by the rtpproxy. But there are a problem  . The endpoint 
would sent Bye message to SER when it connect the SER about 32 sec. I have 
tested some endpoints but it is the same (only can maintain 32 sec 
connecting). Why? I don't know how to solve the problem. My config file 
following:


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/nathelper.so"
loadmodule "/usr/local/lib/ser/modules/textops.so"
loadmodule "/usr/local/lib/ser/modules/uri_db.so"
loadmodule "/usr/local/lib/ser/modules/uri.so"
loadmodule "/usr/local/lib/ser/modules/domain.so"

modparam("auth_db|usrloc|uri_db", "db_url", 
"mysql://ser:heslo@localhost/ser")

modparam("auth_db", "calculate_ha1", 1)
modparam("auth_db", "password_column", "password")

modparam("nathelper", "natping_interval", 30)
modparam("nathelper", "ping_nated_only", 1)
modparam("nathelper", "rtpproxy_sock", "unix:/var/run/rtpproxy.sock")

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

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

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

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!="REGISTER") {
		record_route();
	};

	if (method=="BYE" || method=="CANCEL") {
		unforce_rtp_proxy();
	}

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

		if (has_totag() && method=="INVITE") {
			if (nat_uac_test("19")) {
				setflag(6);
				force_rport();
				fix_nated_contact();
			};
                    force_rtp_proxy("l");
		};
  		route(1);
		break;
	};

	# -----------------------------------------------------------------
	# Call Type Processing Section
	# -----------------------------------------------------------------
	if (uri==myself) {
		if (method=="INVITE") {
			route(3);
			break;
		} else 	if (method=="REGISTER") {
			route(2);
			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" && isflagset(6)) {
		  unforce_rtp_proxy();
		};
		sl_reply_error();
	};
}

route[2] {

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

	if (!search("^Contact: \*") && nat_uac_test("19")) {
		setflag(6);
		fix_nated_register();
		force_rport();
	};

	sl_send_reply("100", "Trying");

	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] {

	# -----------------------------------------------------------------
	# INVITE Message Handler
	# -----------------------------------------------------------------

	if (nat_uac_test("19")) {
		setflag(6);
     }

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

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

     consume_credentials();

	if (isflagset(6)) {
		force_rport();
		fix_nated_contact();
		force_rtp_proxy();
	};

	t_on_reply("1");

	if (!t_relay()) {
		if(isflagset(6)) {
			unforce_rtp_proxy();
		}
		sl_reply_error();
	};
}

onreply_route[1] {

	if (isflagset(6) && status=~"(180)|(183)|2[0-9][0-9]") {
  	if (!search("^Content-Length:\ 0")) {
			force_rtp_proxy();
		};
	} else if (nat_uac_test("1")) {
		fix_nated_contact();
	};
}

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