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|
#!/bin/sh
#
OP=$1
IFACE=$2
IP=$3
MASKBITS=$4
READD_BASE=$5
READD_SCRIPT=$6
add_ip_to_iface()
{
local _iface=$1
local _ip=$2
local _maskbits=$3
local _readd_base=$4
local _script_dir="$_readd_base/$_ip.$_maskbits"
# we make sure the interface is up first
ip link set $_iface up || {
echo "Failed to bringup interface $_iface"
return 1;
}
ip addr add $_ip/$_maskbits brd + dev $_iface || {
echo "Failed to add $_ip/$_maskbits on dev $_iface"
return 1;
}
mkdir -p $_script_dir || {
echo "Failed to mkdir -p $_script_dir"
return 1;
}
rm -f $_script_dir/*
return 0;
}
delete_ip_from_iface()
{
local _iface=$1
local _ip=$2
local _maskbits=$3
local _readd_base=$4
local _script_dir="$_readd_base/$_ip.$_maskbits"
# the ip tool will delete all secondary IPs if this is the primary. To work around
# this _very_ annoying behaviour we have to keep a record of the secondaries and re-add
# them afterwards. yuck
local _secondaries=""
if ip addr list dev $_iface primary | grep -q "inet $_ip/$_maskbits " ; then
_secondaries=`ip addr list dev $_iface secondary | grep " inet " | awk '{print $2}'`
fi
local _failed=0
ip addr del $_ip/$_maskbits dev $_iface || _failed=1
[ -z "$_secondaries" ] || {
local _i=""
for _i in $_secondaries; do
if ip addr list dev $_iface | grep -q "inet $_i" ; then
echo "kept secondary $_i on dev $_iface"
else
echo "re-adding secondary address $_i to dev $_iface"
ip addr add $_i brd + dev $_iface || _failed=1
fi
local _s_ip=`echo "$_i" | cut -d '/' -f1`
local _s_maskbits=`echo "$_i" | cut -d '/' -f2`
local _s_script_dir="$_readd_base/$_s_ip.$_s_maskbits"
local _s_script=""
for _s_script in $_s_script_dir/*; do
test -x "$_s_script" || {
continue
}
echo "call $_s_script '$_iface' '$_s_ip' '$_s_maskbits'"
$_s_script "$_iface" "$_s_ip" "$_s_maskbits" || {
ret=$?
echo "$_s_script '$_iface' '$_s_ip' '$_s_maskbits' - failed - $ret"
_failed=1
}
done
done
}
test -d $_script_dir && {
rm -f $_script_dir/*
}
[ $_failed = 0 ] || {
echo "Failed to del $_ip on dev $_iface"
return 1;
}
return 0;
}
setup_iface_ip_readd_script()
{
local _iface=$1
local _ip=$2
local _maskbits=$3
local _readd_base=$4
local _readd_script=$5
local _script_dir="$_readd_base/$_ip.$_maskbits"
test -x "$_readd_script" || {
echo "Script '$_readd_script' isn't executable"
return 1;
}
local _readd_basename=`basename $_readd_script`
local _readd_final="$_script_dir/$_readd_basename"
mkdir -p $_script_dir || {
echo "Failed to mkdir -p $_script_dir"
return 1;
}
cp -a $_readd_script $_readd_final || {
echo "Failed to - cp -a $_readd_script $_readd_final"
return 1;
}
return 0
}
case "$OP" in
add)
add_ip_to_iface $IFACE $IP $MASKBITS $READD_BASE
exit $?
;;
delete)
delete_ip_from_iface $IFACE $IP $MASKBITS $READD_BASE
exit $?
;;
readd_script)
setup_iface_ip_readd_script $IFACE $IP $MASKBITS $READD_BASE $READD_SCRIPT
exit $?
;;
esac
echo "$0: unknown operation[$OP]"
exit 1
|
