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#!/bin/sh -e
. /etc/splash.sh
# acquire lock
exec 666<$chain_id_file
flock -x 666
# check for current inetable state, allowing a command line override
if have_splash_iptable $1; then
# remove old entries from splash p2ptbl
p2ptbl filter $tbl \
awk '{ if ($2 > '$(date +%s)') print $0 }'
# create new iptables chain from splash p2ptbl and replace the old
# chain with the new one; this ensures that a user stays splashed
# during the runtime of this script
chain_id=$(($chain_id + 1))
chain=$chain_prefix$chain_id
iptables -t nat -N $chain
iptables -t nat -I prerouting_inet_splashed -j $chain
echo $chain_id > $chain_id_file
p2ptbl show $tbl \
| while read mac rest; do
add_splash_iptable "$mac"
done
while iptables -t nat -D prerouting_inet_splashed 2 &>/dev/null; do :; done
else
# no working gw -> remove reference to iptable copy of splash db
iptables -t nat -F prerouting_inet_splashed
fi
# remove old splash_db chains
for i in $(iptables -t nat -L | grep ^Chain | grep '0 references' \
| cut -f2 -d' ' | grep ^splash_db); do
iptables -t nat -F $i
iptables -t nat -X $i
done
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