diff --git a/alterator-net-functions/alterator-net-functions b/alterator-net-functions/alterator-net-functions
index 2e0694e..eac5984 100644
--- a/alterator-net-functions/alterator-net-functions
+++ b/alterator-net-functions/alterator-net-functions
@@ -550,13 +550,21 @@ __filter_etcnet_iface_default()
 	[ -n "$ifname" -a "$ifname" != "lo" -a "$ifname" != "default" -a "$ifname" != "unknown" ]
 }
 
+__filter_iface_type()
+{
+	local ifacedir="$1"
+	local iftype="$2"
+
+	__filter_etcnet_iface_default "$ifacedir" || return 1
+	[ -n "$iftype" -a "$(read_iface_option "$ifacedir" TYPE)" = "$iftype" ] || return 1
+}
+
 __filter_iface_ppp()
 {
 	local ifacedir="$1"
 	local t="${2:-}"
 
-	__filter_etcnet_iface_default "$ifacedir" || return 1
-	[ "$(read_iface_option "$ifacedir" TYPE)" = "ppp" ] || return 1
+	__filter_iface_type "$ifacedir" "ppp" || return 1
 
 	if [ -n "$t" ]; then
 		[ "$(read_iface_option "$ifacedir" PPPTYPE)" = "$t" ] || return 1
@@ -565,6 +573,15 @@ __filter_iface_ppp()
 	return 0
 }
 
+__filter_iface_static()
+{
+	local ifacedir="$1"
+	local ipv="${2:-4}"
+
+	__filter_etcnet_iface_default "$ifacedir" || return 1
+	[ "$(read_iface_option "$ifacedir" BOOTPROTO)" = "static" -a -s "$ifacedir/ipv${ipv}address" ] || return 1
+}
+
 ### list various interface types
 # list_etcnet_iface_filtered [ ifaces_dir [ filter_func [ filter_func params ... ]]]
 #
@@ -602,12 +619,7 @@ list_bond()
 {
 	local dir="${1:-$etcnet_iface_dir}"
 
-	for i in `find "$dir" -mindepth 1 -maxdepth 1 -type d`; do
-		local name="${i##*/}"
-		[ "$name" != "lo" -a "$name" != "default" -a "$name" != "unknown" ] || continue
-		[ "$(read_iface_option $i TYPE)" = "bond" ] || continue
-		echo "$name"
-	done
+	list_etcnet_iface_filtered "$dir" __filter_iface_type "bond"
 }
 
 list_eth()
@@ -634,17 +646,13 @@ list_iface()
 	done
 }
 
-# list_static_iface [ ip_version ]
+# list_static_iface [ ip_version [ ifaces_dir ] ]
 list_static_iface()
 {
-	local p="${1:-4}"
+	local ipv="${1:-4}"
+	local dir="${2:-$etcnet_iface_dir}"
 
-    for i in `find "$etcnet_iface_dir" -type d`; do
-	local name="${i##*/}"
-	[ "$name" != "lo" -a "$name" != "default" -a "$name" != "unknown" ] || continue
-	[ "$(read_iface_option $i BOOTPROTO)" = "static" -a -s "$i/ipv${p}address" ] || continue
-	echo "${i##*/}"
-    done
+	list_etcnet_iface_filtered "$dir" __filter_iface_static "$ipv"
 }
 
 # list_network [ ip_version ]