--- a/vz/dists/scripts/debian-add_ip.sh	Sat Sep 25 14:20:09 2010 -0400
+++ b/vz/dists/scripts/debian-add_ip.sh	Mon Sep 27 09:20:05 2010 -0400
@@ -77,13 +77,14 @@
 function create_config()
 {
 	local ip=$1
-	local ifnum=$2
+	local netmask=$2
+	local ifnum=$3
 
 	if [ "${ip#*:}" = "${ip}" ]; then
 	    echo -e "auto ${VENET_DEV}:${ifnum}
 iface ${VENET_DEV}:${ifnum} inet static
 	address ${ip}
-	netmask 255.255.255.255
+	netmask ${netmask}
 	broadcast 0.0.0.0
 " >> ${CFGFILE}.bak
 
@@ -111,9 +112,31 @@
 	done
 }
 
+function get_netmask()
+{
+  NETMASK=""
+
+  local i
+  local full_octets=$(($1/8))
+  local partial_octet=$(($1%8))
+
+  for ((i=0;i<4;i+=1)); do
+    if [ $i -lt $full_octets ]; then
+      NETMASK+=255
+    elif [ $i -eq $full_octets ]; then
+      NETMASK+=$((256 - 2**(8-$partial_octet)))
+    else
+      NETMASK+=0
+    fi  
+    test $i -lt 3 && NETMASK+=.
+  done
+}
+
 function add_ip()
 {
+	local ip_cidr
 	local ip
+	local cidr
 	local found
 	local add
 	local iface
@@ -131,13 +154,20 @@
 		mv ${CFGFILE}.bak ${CFGFILE}
 	fi
 	cp -f ${CFGFILE} ${CFGFILE}.bak
-	for ip in ${IP_ADDR}; do
+	for ip_cidr in ${IP_ADDR}; do
+		ip=${ip_cidr%/*}
+		if [ "${ip}" = "${ip_cidr}" ]; then
+			cidr=32	
+		else
+			cidr=${ip_cidr##*/}
+		fi
 		found=
 		if grep -e "\\<${ip}\\>" >/dev/null 2>&1  ${CFGFILE}.bak; then
 			continue
 		fi
 		get_free_aliasid
-		create_config ${ip} ${IFNUM}
+		get_netmask ${cidr}
+		create_config ${ip} ${NETMASK} ${IFNUM}
 	done
 	mv -f ${CFGFILE}.bak ${CFGFILE}
 	if [ "x${VE_STATE}" = "xrunning" ]; then