i think i almost have the default pass, i have to understand one more function

verb/fs.sbin/ddns.sh

@@ -0,0 +1,54 @@
+#!/bin/sh
+#
+# $Id: ddns.sh, v1.00 2009-11-12 andy
+#
+# usage: ddns.sh
+#
+
+killall -q inadyn
+
+# check ddns enable or disable
+enable=`nvram_get 2860 DDNSEnable`
+if [ "$enable" = "0" ]; then
+exit 0
+fi
+
+srv=`nvram_get 2860 DDNSProvider`
+ddns=`nvram_get 2860 DDNSHostName`
+u=`nvram_get 2860 DDNSUserName`
+pw=`nvram_get 2860 DDNSPassword`
+to=`nvram_get 2860 DDNSTimeout`
+
+if [ "$srv" = "" -o "$srv" = "none" ]; then
+	exit 0
+fi
+if [ "$ddns" = "" -o "$u" = "" -o "$pw" = "" ]; then
+	exit 0
+fi
+
+dyndnssrv="dyndns.org"
+
+if [ "$srv" = "www.dlinkddns.com" ]; then
+	inadyn -u $u -p $pw -a $ddns --dyndns_system dyndns@$dyndnssrv &
+elif [ "$srv" = "www.DynDNS.org(Custom)" ]; then
+	inadyn -u $u -p $pw -a $ddns --dyndns_system custom@$dyndnssrv &
+elif  [ "$srv" = "www.DynDNS.org(Free)" ]; then
+	inadyn -u $u -p $pw -a $ddns --dyndns_system dyndns@$dyndnssrv &
+elif [ "$srv" = "www.DynDNS.org" ]; then
+	inadyn -u $u -p $pw -a $ddns --dyndns_system dyndns@$dyndnssrv &
+elif  [ "$srv" = "members.dyndns.org" ]; then
+	inadyn -u $u -p $pw -a $ddns --dyndns_system dyndns@$dyndnssrv &
+elif [ "$srv" = "dyndns.org" ]; then
+	inadyn -u $u -p $pw -a $ddns --dyndns_system dyndns@$dyndnssrv &
+elif [ "$srv" = "freedns.afraid.org" ]; then
+	inadyn -u $u -p $pw -a $ddns --dyndns_system default@$srv &
+elif [ "$srv" = "zoneedit.com" ]; then
+	inadyn -u $u -p $pw -a $ddns --dyndns_system default@$srv &
+elif [ "$srv" = "no-ip.com" ]; then
+	inadyn -u $u -p $pw -a $ddns --dyndns_system default@$srv &
+else
+	inadyn -u $u -p $pw -a $ddns --dyndns_server_name $srv &
+	#echo "$0: unknown DDNS provider: $srv"
+	#exit 1
+fi
+