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findif.sh
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#!/bin/sh
ipcheck_ipv4() {
local r1_to_255="([1-9][0-9]?|1[0-9][0-9]|2[0-4][0-9]|25[0-5])"
local r0_to_255="([0-9][0-9]?|1[0-9][0-9]|2[0-4][0-9]|25[0-5])"
local r_ipv4="^$r1_to_255\.$r0_to_255\.$r0_to_255\.$r0_to_255$"
echo "$1" | grep -q -Ee "$r_ipv4"
}
ipcheck_ipv6() {
! echo "$1" | grep -qs "[^0-9:a-fA-F]"
}
ifcheck() {
local ifname="$1"
$IP2UTIL link show dev $ifname 2>&1 >/dev/null
}
prefixcheck() {
local prefix=$1
local prefix_length=${#prefix}
local prefix_check=$2
if [ $prefix_length -gt 3 -o $prefix_length -eq 0 ] ; then
return 1
fi
echo "$prefix" | grep -qs "[^0-9]"
if [ $? = 0 ] ; then
return 1
fi
if [ $prefix -lt 1 -o $prefix -gt $prefix_check ] ; then
return 1
fi
return 0
}
getnetworkinfo()
{
local line netinfo
ip -o -f inet route list match $OCF_RESKEY_ip table local scope host | (while read line;
do
netinfo=`echo $line | awk '{print $2}'`
case $netinfo in
*/*)
set -- $line
break
;;
esac
done
echo $line)
}
findif_check_params()
{
local family="$1"
local match="$OCF_RESKEY_ip"
local nic="$OCF_RESKEY_nic"
local netmask="$OCF_RESKEY_cidr_netmask"
local brdcast="$OCF_RESKEY_broadcast"
local errmsg
# Do a sanity check only on start and validate-all
# to avoid returning OCF_ERR_CONFIGURED from the monitor operation.
case $__OCF_ACTION in
start|validate-all) true;;
*) return $OCF_SUCCESS;;
esac
if [ -n "$nic" ] ; then
errmsg=`ifcheck $nic`
if [ $? -ne 0 ] ; then
ocf_log err "Invalid interface name [$nic]: $errmsg"
return $OCF_ERR_CONFIGURED
fi
fi
if [ "$family" = "inet6" ] ; then
ipcheck_ipv6 $match
if [ $? = 1 ] ; then
ocf_log err "IP address [$match] not valid."
return $OCF_ERR_CONFIGURED
fi
if [ -z "$nic" ] ; then
echo $match | grep -qis '^fe80::'
if [ $? = 0 ] ; then
ocf_log err "'nic' parameter is mandatory for a link local address [$match]."
return $OCF_ERR_CONFIGURED
fi
fi
if [ -n "$netmask" ] ; then
prefixcheck $netmask 128
if [ $? = 1 ] ; then
ocf_log err "Invalid netmask specification [$netmask]."
return $OCF_ERR_CONFIGURED
fi
fi
else
# family = inet
ipcheck_ipv4 $match
if [ $? = 1 ] ; then
ocf_log err "IP address [$match] not valid."
return $OCF_ERR_CONFIGURED
fi
if [ -n "$netmask" ] ; then
prefixcheck $netmask 32
if [ $? = 1 ] ; then
ocf_log err "Invalid netmask specification [$netmask]."
return $OCF_ERR_CONFIGURED
fi
fi
if [ -n "$brdcast" ] ; then
ipcheck_ipv4 $brdcast
if [ $? = 1 ] ; then
ocf_log err "Invalid broadcast address [$brdcast]."
return $OCF_ERR_CONFIGURED
fi
fi
fi
return $OCF_SUCCESS
}
findif()
{
local match="$OCF_RESKEY_ip"
local family
local scope
local nic="$OCF_RESKEY_nic"
local netmask="$OCF_RESKEY_cidr_netmask"
local brdcast="$OCF_RESKEY_broadcast"
echo $match | grep -qs ":"
if [ $? = 0 ] ; then
family="inet6"
else
family="inet"
scope="scope link"
fi
findif_check_params $family || return $?
if [ -n "$netmask" ] ; then
match=$match/$netmask
fi
if [ -n "$nic" ] ; then
# NIC supports more than two.
set -- `ip -o -f $family route list match $match $scope | grep "dev $nic"`
else
set -- `ip -o -f $family route list match $match $scope`
fi
if [ $# = 0 ] ; then
case $OCF_RESKEY_ip in
127.*)
set -- `getnetworkinfo`
shift;;
esac
fi
if [ -z "$nic" -o -z "$netmask" ] ; then
if [ $# = 0 ] ; then
ocf_log err "Unable to find nic or netmask."
return $OCF_ERR_GENERIC
fi
case $1 in
*/*) : OK ;;
*)
ocf_log err "Unable to find cidr_netmask."
return $OCF_ERR_GENERIC ;;
esac
fi
[ -z "$nic" ] && nic=$3
[ -z "$netmask" ] && netmask=${1#*/}
if [ $family = "inet" ] ; then
if [ -z "$brdcast" ] ; then
if [ -n "$7" ] ; then
set -- `ip -o -f $family addr show | grep $7`
[ "$5" = brd ] && brdcast=$6
fi
fi
else
if [ -z "$OCF_RESKEY_nic" -a "$netmask" != "${1#*/}" ] ; then
ocf_log err "Unable to find nic, or netmask mismatch."
return $OCF_ERR_GENERIC
fi
fi
echo "$nic netmask $netmask broadcast $brdcast"
return $OCF_SUCCESS
}

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findif.sh (4 KB)

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