@@ -0,0 +1,217 @@
#
# reference: http://pkgs.fedoraproject.org/cgit/ipset.git/tree/ipset.start-stop
# file location: /usr/libexec/ipset/ipset.start-stop
#
# mkdir /usr/libexec/ipset/
# chmod +x /usr/libexec/ipset/ipset.start-stop
#
#!/bin/bash
#
# ipset Start and stop ipset firewall sets
#
# config: /etc/ipset/ipset
#
IPSET=ipset
IPSET_BIN=/usr/sbin/${IPSET}
IPSET_DATA=/etc/${IPSET}/${IPSET}
IPTABLES_CONFIG=/etc/sysconfig/iptables-config
IP6TABLES_CONFIG=${IPTABLES_CONFIG/iptables/ip6tables}
TMP_FIFO=/tmp/${IPSET}.$$
if [[ ! -x ${IPSET_BIN} ]]; then
echo "${IPSET_BIN} does not exist."
exit 5
fi
CLEAN_FILES=TMP_FIFO
trap "rm -f \$CLEAN_FILES" EXIT
# Default ipset configuration:
[[ -z $IPSET_SAVE_ON_STOP ]] && IPSET_SAVE_ON_STOP=no # Overridden by ip(6)tables IP(6)TABLES_SAVE_ON_STOP
[[ -z $IPSET_SAVE_ON_RESTART ]] && IPSET_SAVE_ON_RESTART=no # Overridden by ip(6)tables IP(6)TABLES_SAVE_ON_RESTART
# Load iptables configuration(s)
[[ -f "$IPTABLES_CONFIG" ]] && . "$IPTABLES_CONFIG"
[[ -f "$IP6TABLES_CONFIG" ]] && . "$IP6TABLES_CONFIG"
# It doesn't make sense to save iptables config and not our config
[[ ${IPTABLES_SAVE_ON_STOP} = yes || ${IP6TABLES_SAVE_ON_STOP} = yes ]] && IPSET_SAVE_ON_STOP=yes
[[ ${IPTABLES_SAVE_ON_RESTART} = yes || ${IP6TABLES_SAVE_ON_RESTART} = yes ]] && IPSET_SAVE_ON_RESTART=yes
check_can_unload() {
# If the xt_set module is loaded and can't be unloaded, then iptables is
# using ipsets, so refuse to stop the service.
if [[ -n $(lsmod | grep "^xt_set ") ]]; then
rmmod xt_set 2>/dev/null
[[ $? -ne 0 ]] && echo Current iptables configuration requires ipsets && return 1
fi
return 0
}
flush_n_delete() {
local ret=0 set
# Flush sets
${IPSET_BIN} flush
let ret+=$?
# Delete ipset sets. If we don't do them individually, then none
# will be deleted unless they all can be.
for set in $(${IPSET_BIN} list -name); do
${IPSET_BIN} destroy 2>/dev/null
[[ $? -ne 0 ]] && ret=1
done
return $ret
}
start_clean()
{
mkfifo -m go= "${TMP_FIFO}"
[[ $? -ne 0 ]] && return 1
# Get the lists of sets in current(old) config and new config
old_sets="$(${IPSET_BIN} list -name | sort -u)"
new_sets="$(grep ^create "${IPSET_DATA}" | cut -d " " -f 2 | sort -u)"
# List of sets no longer wanted
drop_sets="$( printf "%s\n" "${old_sets}" > "${TMP_FIFO}" &
printf "%s\n" "${new_sets}" | comm -23 "${TMP_FIFO}" -
)"
# Get rid of sets no longer needed
# Unfortunately -! doesn't work for destroy, so we have to do it a command at a time
for dset in $drop_sets; do
ipset destroy $dset 2>/dev/null
# If it won't go - ? in use by iptables, just clear it
[[ $? -ne 0 ]] && ipset flush $dset
done
# Now delete the set members no longer required
${IPSET_BIN} save | grep "^add " | sort >${TMP_FIFO} &
grep "^add " ${IPSET_DATA} | sort | comm -23 ${TMP_FIFO} - | sed -e "s/^add /del /" \
| ${IPSET_BIN} restore -!
# At last we can add the set members we haven't got
ipset restore -! <${IPSET_DATA}
rm ${TMP_FIFO}
return 0
}
start() {
# Do not start if there is no config file.
[[ ! -f "$IPSET_DATA" ]] && echo "Loaded with no configuration" && return 0
# We can skip the first bit and do a simple load if
# there is no current ipset configuration
res=1
if [[ -n $(${IPSET_BIN} list -name) ]]; then
# The following may fail for some bizarre reason
start_clean
res=$?
[[ $res -ne 0 ]] && echo "Some old configuration may remain"
fi
# res -ne 0 => either start_clean failed, or we didn't need to run it
if [[ $res -ne 0 ]]; then
# This is the easy way to start but would leave any old
# entries still configured. Still, better than nothing -
# but fine if we had no config
${IPSET_BIN} restore -! <${IPSET_DATA}
res=$?
fi
if [[ $res -ne 0 ]]; then
return 1
fi
return 0
}
stop() {
# Nothing to stop if ip_set module is not loaded.
lsmod | grep -q "^ip_set "
[[ $? -ne 0 ]] && return 6
flush_n_delete
[[ $? -ne 0 ]] && echo Warning: Not all sets were flushed/deleted
return 0
}
save() {
# Do not save if ip_set module is not loaded.
lsmod | grep -q "^ip_set "
[[ $? -ne 0 ]] && return 6
[[ -z $(${IPSET_BIN} list -name) ]] && return 0
ret=0
TMP_FILE=$(/bin/mktemp -q /tmp/$IPSET.XXXXXX) \
&& CLEAN_FILES+=" $TMP_FILE" \
&& chmod 600 "$TMP_FILE" \
&& ${IPSET_BIN} save > $TMP_FILE 2>/dev/null \
&& [[ -s $TMP_FILE ]] \
|| ret=1
if [[ $ret -eq 0 ]]; then
# No need to do anything if the files are the same
if [[ ! -f $IPSET_DATA ]]; then
mv $TMP_FILE $IPSET_DATA && chmod 600 $IPSET_DATA || ret=1
else
diff -q $TMP_FILE $IPSET_DATA >/dev/null
if [[ $? -ne 0 ]]; then
if [[ -f $IPSET_DATA ]]; then
cp -f --preserve=timestamps $IPSET_DATA $IPSET_DATA.save \
&& chmod 600 $IPSET_DATA.save \
|| ret=1
fi
if [[ $ret -eq 0 ]]; then
cp -f --preserve=timestamps $TMP_FILE $IPSET_DATA \
&& chmod 600 $IPSET_DATA \
|| ret=1
fi
fi
fi
fi
rm -f $TMP_FILE
return $ret
}
case "$1" in
start)
start
RETVAL=$?
;;
stop)
check_can_unload || exit 1
[[ $IPSET_SAVE_ON_STOP = yes ]] && save
stop
RETVAL=$?
[[ $RETVAL -eq 6 ]] && echo "${IPSET}: not running" && exit 0
;;
reload)
[[ $IPSET_SAVE_ON_RESTART = yes ]] && save
stop
RETVAL=$?
[[ $RETVAL -eq 6 ]] && echo "${IPSET}: not running" && exit 0
start
RETVAL=$?
;;
*)
echo "Usage: $IPSET {start|stop|reload}" >&2
exit 1
esac
exit $RETVAL
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