iptables/SOURCES/ebtables-helper

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2022-05-17 10:25:34 +00:00
#!/bin/bash
# compat for removed initscripts dependency
success() {
echo "[ OK ]"
return 0
}
failure() {
echo "[FAILED]"
return 1
}
# internal variables
EBTABLES_CONFIG=/etc/sysconfig/ebtables-config
EBTABLES_DATA=/etc/sysconfig/ebtables
EBTABLES_TABLES="filter nat"
if ebtables --version | grep -q '(legacy)'; then
EBTABLES_TABLES+=" broute"
fi
VAR_SUBSYS_EBTABLES=/var/lock/subsys/ebtables
# ebtables-config defaults
EBTABLES_SAVE_ON_STOP="no"
EBTABLES_SAVE_COUNTER="no"
# load config if existing
[ -f "$EBTABLES_CONFIG" ] && . "$EBTABLES_CONFIG"
initialize() {
local ret=0
for table in $EBTABLES_TABLES; do
ebtables -t $table --init-table || ret=1
done
return $ret
}
sanitize_dump() {
local drop=false
export EBTABLES_TABLES
cat $1 | while read line; do
case $line in
\**)
drop=false
local table="${line#\*}"
local found=false
for t in $EBTABLES_TABLES; do
if [[ $t == "$table" ]]; then
found=true
break
fi
done
$found || drop=true
;;
esac
$drop || echo "$line"
done
}
start() {
if [ -f $EBTABLES_DATA ]; then
echo -n $"ebtables: loading ruleset from $EBTABLES_DATA: "
sanitize_dump $EBTABLES_DATA | ebtables-restore
else
echo -n $"ebtables: no stored ruleset, initializing empty tables: "
initialize
fi
local ret=$?
touch $VAR_SUBSYS_EBTABLES
return $ret
}
save() {
echo -n $"ebtables: saving active ruleset to $EBTABLES_DATA: "
export EBTABLES_SAVE_COUNTER
ebtables-save >$EBTABLES_DATA && success || failure
}
case $1 in
start)
[ -f "$VAR_SUBSYS_EBTABLES" ] && exit 0
start && success || failure
RETVAL=$?
;;
stop)
[ "x$EBTABLES_SAVE_ON_STOP" = "xyes" ] && save
echo -n $"ebtables: stopping firewall: "
initialize && success || failure
RETVAL=$?
rm -f $VAR_SUBSYS_EBTABLES
;;
save)
save
;;
*)
echo "usage: ${0##*/} {start|stop|save}" >&2
RETVAL=2
;;
esac
exit $RETVAL