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Ability to configure wait for the xtables lock #58

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Ability to configure wait for the xtables lock #58

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21 changes: 11 additions & 10 deletions entry
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Original file line number Diff line number Diff line change
Expand Up @@ -27,37 +27,38 @@ check_iptables_mode() {
}

set_nft() {
for i in iptables iptables-save iptables-restore ip6tables; do
for i in iptables iptables-save iptables-restore ip6tables; do
ln -sf /sbin/xtables-nft-multi "$BIN_DIR/$i";
done
}

set_legacy() {
for i in iptables iptables-save iptables-restore ip6tables; do
for i in iptables iptables-save iptables-restore ip6tables; do
ln -sf /sbin/xtables-legacy-multi "$BIN_DIR/$i";
done
}

start_proxy() {
wait_seconds="${WAIT_SECONDS:-0}"
for src_range in ${SRC_RANGES}; do
if echo ${src_range} | grep -Eq ":"; then
ip6tables -t filter -I FORWARD -s ${src_range} -p ${DEST_PROTO} --dport ${DEST_PORT} -j ACCEPT
ip6tables -w ${wait_seconds} -t filter -I FORWARD -s ${src_range} -p ${DEST_PROTO} --dport ${DEST_PORT} -j ACCEPT
else
iptables -t filter -I FORWARD -s ${src_range} -p ${DEST_PROTO} --dport ${DEST_PORT} -j ACCEPT
iptables -w ${wait_seconds} -t filter -I FORWARD -s ${src_range} -p ${DEST_PROTO} --dport ${DEST_PORT} -j ACCEPT
fi
done

for dest_ip in ${DEST_IPS}; do
if echo ${dest_ip} | grep -Eq ":"; then
[ $(cat /proc/sys/net/ipv6/conf/all/forwarding) == 1 ] || exit 1
ip6tables -t filter -A FORWARD -d ${dest_ip}/128 -p ${DEST_PROTO} --dport ${DEST_PORT} -j DROP
ip6tables -t nat -I PREROUTING -p ${DEST_PROTO} --dport ${SRC_PORT} -j DNAT --to [${dest_ip}]:${DEST_PORT}
ip6tables -t nat -I POSTROUTING -d ${dest_ip}/128 -p ${DEST_PROTO} -j MASQUERADE
ip6tables -w ${wait_seconds} -t filter -A FORWARD -d ${dest_ip}/128 -p ${DEST_PROTO} --dport ${DEST_PORT} -j DROP
ip6tables -w ${wait_seconds}-t nat -I PREROUTING -p ${DEST_PROTO} --dport ${SRC_PORT} -j DNAT --to [${dest_ip}]:${DEST_PORT}
ip6tables -w ${wait_seconds}-t nat -I POSTROUTING -d ${dest_ip}/128 -p ${DEST_PROTO} -j MASQUERADE
else
[ $(cat /proc/sys/net/ipv4/ip_forward) == 1 ] || exit 1
iptables -t filter -A FORWARD -d ${dest_ip}/32 -p ${DEST_PROTO} --dport ${DEST_PORT} -j DROP
iptables -t nat -I PREROUTING -p ${DEST_PROTO} --dport ${SRC_PORT} -j DNAT --to ${dest_ip}:${DEST_PORT}
iptables -t nat -I POSTROUTING -d ${dest_ip}/32 -p ${DEST_PROTO} -j MASQUERADE
iptables -w ${wait_seconds} -t filter -A FORWARD -d ${dest_ip}/32 -p ${DEST_PROTO} --dport ${DEST_PORT} -j DROP
iptables -w ${wait_seconds} -t nat -I PREROUTING -p ${DEST_PROTO} --dport ${SRC_PORT} -j DNAT --to ${dest_ip}:${DEST_PORT}
iptables -w ${wait_seconds} -t nat -I POSTROUTING -d ${dest_ip}/32 -p ${DEST_PROTO} -j MASQUERADE
fi
done
}
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