Correctly get runtime LAN ifname and addresses

1. Correctly get LAN runtime ifname and addresses using network
functions
2. Do not store ip settings in config files as they may change next
time.

net/ocserv/files/ocserv.init

@@ -3,6 +3,8 @@
 START=50
 USE_PROCD=1
 
+. $IPKG_INSTROOT/lib/functions/network.sh
+
 setup_config() {
 	config_get port         $1 port "4443"
 	config_get max_clients  $1 max_clients "8"
@@ -33,26 +35,27 @@ setup_config() {
 				uci set dhcp.lan.start=100
 				uci set dhcp.lan.limit=91
 			fi
-			ip=$(uci get network.lan.ipaddr)
+			network_get_ipaddr ip lan
 			ipaddr="$(echo $ip|cut -d . -f1,2,3).192"
 			netmask="255.255.255.192"
-			uci set ocserv.config.ipaddr="$ipaddr"
-			uci set ocserv.config.netmask="$netmask"
-			uci commit
 		fi
 
 		if test -z "$ip6addr";then
-			ip6addr=$(uci get network.lan.ip6addr 2>/dev/null)
-			test -n "$ip6addr" && uci set ocserv.config.ip6addr="$ip6addr"
-			uci commit
+			network_get_ipaddr6 ip6addr lan
+			# Append ipv6 prefix
+			test -n "$ip6addr" && ip6addr="$ip6addr/96"
 		fi
 
 		ping_leases=1
-		test -n "$ipaddr" && sysctl -w "net.ipv4.conf.$(uci get network.lan.ifname).proxy_arp"=1 >/dev/null
-		test -n "$ip6addr" && sysctl -w "net.ipv6.conf.$(uci get network.lan.ifname).proxy_ndp"=1 >/dev/null
+		local ifname
+		network_get_device ifname lan
+		if test -n "ifname";then
+			test -n "$ipaddr" && sysctl -w "net.ipv4.conf.$ifname.proxy_arp"=1 >/dev/null
+			test -n "$ip6addr" && sysctl -w "net.ipv6.conf.$ifname.proxy_ndp"=1 >/dev/null
+		fi
 	else
-		test "$ipaddr" = "" && ipaddr="192.168.100.0"
-		test "$netmask" = "" && ipaddr="255.255.255.0"
+		test -z "$ipaddr" && ipaddr="192.168.100.0"
+		test -z "$netmask" && netmask="255.255.255.0"
 	fi
 
 	enable_default_domain="#"
@@ -147,7 +150,7 @@ start_service() {
 	[ -f /etc/config/ocserv-dir/ca-key.pem ] && mv /etc/config/ocserv-dir/ca-key.pem /etc/ocserv/ca-key.pem
 	[ -f /etc/config/ocserv-dir/ca.pem ] && mv /etc/config/ocserv-dir/ca.pem /etc/ocserv/ca.pem
 	[ -f /etc/config/ocserv-dir/server-key.pem ] && mv /etc/config/ocserv-dir/server-key.pem /etc/ocserv/server-key.pem
-	[ -f /etc/config/ocserv-dir/server-cert.pem ] && mv /etc/config/ocserv-dir/server-cert.pem /etc/ocserv/server-cert.pem 
+	[ -f /etc/config/ocserv-dir/server-cert.pem ] && mv /etc/config/ocserv-dir/server-cert.pem /etc/ocserv/server-cert.pem
 	[ -d /etc/config/ocserv-dir ] && rmdir /etc/config/ocserv-dir
 
 	[ ! -f /etc/ocserv/ca-key.pem ] && [ -x /usr/bin/certtool ] && {