add ddns-scripts (package by Eric Bishop)

git-svn-id: svn://svn.openwrt.org/openwrt/packages@10705 3c298f89-4303-0410-b956-a3cf2f4a3e73

net/ddns-scripts/files/usr/lib/ddns/dynamic_dns_functions.sh

@@ -0,0 +1,121 @@
+# /usr/lib/dynamic_dns/dynamic_dns_functions.sh
+#
+# Written by Eric Paul Bishop, Janary 2008
+# Distributed under the terms of the GNU General Public License (GPL) version 2.0
+#
+# This script is (loosely) based on the one posted by exobyte in the forums here:
+# http://forum.openwrt.org/viewtopic.php?id=14040
+
+
+
+. /etc/functions.sh
+include /lib/network
+
+
+#loads all options for a given package and section
+#also, sets all_option_variables to a list of the variable names
+load_all_config_options()
+{
+	pkg_name="$1"
+	section_id="$2"
+
+	ALL_OPTION_VARIABLES=""
+	# this callback loads all the variables
+	# in the section_id section when we do
+	# config_load. We need to redefine
+	# the option_cb for different sections
+	# so that the active one isn't still active
+	# after we're done with it.  For reference
+	# the $1 variable is the name of the option
+	# and $2 is the name of the section
+	config_cb() 
+	{
+		if [ ."$2" = ."$section_id" ]; then
+			option_cb()
+			{
+				ALL_OPTION_VARIABLES="$ALL_OPTION_VARIABLES $1"
+			}
+		else
+			option_cb() { return 0; }
+		fi
+	}
+
+
+	config_load "$pkg_name"
+	for var in $ALL_OPTION_VARIABLES
+	do
+		config_get "$var" "$section_id" "$var"
+	done
+}
+
+
+get_current_ip()
+{
+
+	#if ip source is not defined, assume we want to get ip from wan 
+	if [ "$ip_source" != "interface" ] && [ "$ip_source" != "web" ]
+	then
+		ip_source="network"
+		ip_network="wan"
+	fi
+
+	if [ "$ip_source" = "network" ]
+	then
+		if [ -z "$ip_network" ]
+		then
+			ip_network="wan"
+		fi
+		scan_interfaces
+		config_load /var/state/network
+		config_get ip_interface $ip_network ifname
+	fi
+
+	current_ip='';
+	if [ "$ip_source" = "network" ] || [ "$ip_source" = "interface" ]
+	then
+		current_ip=$(ifconfig $ip_interface | grep -o 'inet addr:[0-9.]*' | grep -o "$ip_regex")
+	else
+		# get ip from web
+		# we check each url in order in ip_url variable, and if no ips are found we use dyndns ip checker
+		# ip is set to FIRST expression in page that matches the ip_regex regular expression
+		for addr in $ip_url
+		do
+			if [ -z "$current_ip" ]
+			then
+				current_ip=$(echo $( wget -O - $addr 2>/dev/null) | grep -o "$ip_regex")
+			fi
+		done
+		
+		#here we hard-code the dyndns checkip url in case no url was specified
+		if [ -z "$current_ip" ]
+		then
+			current_ip=$(echo $( wget -O - http://checkip.dyndns.org 2>/dev/null) | grep -o "$ip_regex")
+		fi
+	fi
+
+	echo "$current_ip"
+}
+
+
+verbose_echo()
+{
+	if [ "$verbose_mode" = 1 ]
+	then
+		echo $1
+	fi
+}
+
+start_daemon_for_all_ddns_sections()
+{
+	SECTIONS=""
+	config_cb() 
+	{
+		SECTIONS="$SECTIONS $2"
+	}
+	config_load "ddns"
+
+	for section in $SECTIONS
+	do
+		/usr/lib/ddns/dynamic_dns_updater.sh $section 0&
+	done
+}