diff options
Diffstat (limited to 'package/firewall/files/reflection.hotplug')
| -rw-r--r-- | package/firewall/files/reflection.hotplug | 209 |
1 files changed, 123 insertions, 86 deletions
diff --git a/package/firewall/files/reflection.hotplug b/package/firewall/files/reflection.hotplug index 843c615bcb..129a922e44 100644 --- a/package/firewall/files/reflection.hotplug +++ b/package/firewall/files/reflection.hotplug @@ -3,34 +3,59 @@ . /lib/functions.sh . /lib/functions/network.sh -if [ "$ACTION" = "add" ] && [ "$INTERFACE" = "wan" ]; then - local wanip - network_get_ipaddr wanip wan || return - - iptables -t nat -F nat_reflection_in 2>/dev/null || { - iptables -t nat -N nat_reflection_in - iptables -t nat -A prerouting_rule -j nat_reflection_in +if [ "$ACTION" = "remove" ]; then + + delete_rules_by_comment() { + local table="$1" + local chain="$2" + local comment="$3" + + iptables -t "$table" --line-numbers -nL "$chain" 2>/dev/null | \ + sed -e ' + 1d; + 1! { + \#^[0-9]\+ .* /\* '"$comment"' \*/.*$# { + s/ .*$//; + G; h; + } + }; + $!d; + ' | xargs -n1 iptables -t "$table" -D "$chain" 2>/dev/null } - iptables -t nat -F nat_reflection_out 2>/dev/null || { - iptables -t nat -N nat_reflection_out - iptables -t nat -A postrouting_rule -j nat_reflection_out - } + delete_rules_by_comment nat nat_reflection_in "$INTERFACE" + delete_rules_by_comment nat nat_reflection_out "$INTERFACE" + delete_rules_by_comment filter nat_reflection_fwd "$INTERFACE" + +elif [ "$ACTION" = "add" ]; then + + prepare_chains() { + iptables -t nat -N nat_reflection_in 2>/dev/null && { + iptables -t nat -A prerouting_rule -j nat_reflection_in + } + + iptables -t nat -N nat_reflection_out 2>/dev/null && { + iptables -t nat -A postrouting_rule -j nat_reflection_out + } - iptables -t filter -F nat_reflection_fwd 2>/dev/null || { - iptables -t filter -N nat_reflection_fwd - iptables -t filter -A forwarding_rule -j nat_reflection_fwd + iptables -t filter -N nat_reflection_fwd 2>/dev/null && { + iptables -t filter -A forwarding_rule -j nat_reflection_fwd + } } find_networks() { find_networks_cb() { local cfg="$1" local zone="$2" + local need_masq="${3:-0}" local name config_get name "$cfg" name - [ "$name" = "$zone" ] && { + local masq + config_get_bool masq "$cfg" masq 0 + + [ "$name" = "$zone" ] && [ "$masq" -ge "$need_masq" ] && { local network config_get network "$cfg" network @@ -39,7 +64,7 @@ if [ "$ACTION" = "add" ] && [ "$INTERFACE" = "wan" ]; then } } - config_foreach find_networks_cb zone "$1" + config_foreach find_networks_cb zone "$@" } setup_fwd() { @@ -51,82 +76,94 @@ if [ "$ACTION" = "add" ] && [ "$INTERFACE" = "wan" ]; then local src config_get src "$cfg" src + [ "$src" == "$ZONE" ] || return + + local dest + config_get dest "$cfg" dest + [ "$dest" != "*" ] || return local target config_get target "$cfg" target DNAT - - [ "$src" = wan ] && [ "$target" = DNAT ] && { - local dest - config_get dest "$cfg" dest "lan" - [ "$dest" != "*" ] || return - - local net - for net in $(find_networks "$dest"); do - local lannet - network_get_subnet lannet "$net" || return - - local proto - config_get proto "$cfg" proto - - local epmin epmax extport - config_get extport "$cfg" src_dport "1-65535" - [ -n "$extport" ] || return - - epmin="${extport%[-:]*}"; epmax="${extport#*[-:]}" - [ "${epmin#!}" != "$epmax" ] || epmax="" - - local ipmin ipmax intport - config_get intport "$cfg" dest_port "$extport" - - ipmin="${intport%[-:]*}"; ipmax="${intport#*[-:]}" - [ "${ipmin#!}" != "$ipmax" ] || ipmax="" - - local exthost - config_get exthost "$cfg" src_dip "$wanip" - - local inthost - config_get inthost "$cfg" dest_ip - [ -n "$inthost" ] || return - - [ "$proto" = all ] && proto="tcp udp" - [ "$proto" = tcpudp ] && proto="tcp udp" - - [ "${inthost#!}" = "$inthost" ] || return 0 - [ "${exthost#!}" = "$exthost" ] || return 0 - - [ "${epmin#!}" != "$epmin" ] && \ - extport="! --dport ${epmin#!}${epmax:+:$epmax}" || \ - extport="--dport $epmin${epmax:+:$epmax}" - - [ "${ipmin#!}" != "$ipmin" ] && \ - intport="! --dport ${ipmin#!}${ipmax:+:$ipmax}" || \ - intport="--dport $ipmin${ipmax:+:$ipmax}" - - local p - for p in ${proto:-tcp udp}; do - case "$p" in - tcp|udp|6|17) - iptables -t nat -A nat_reflection_in \ - -s $lannet -d $exthost \ - -p $p $extport \ - -j DNAT --to $inthost:${ipmin#!}${ipmax:+-$ipmax} - - iptables -t nat -A nat_reflection_out \ - -s $lannet -d $inthost \ - -p $p $intport \ - -j SNAT --to-source ${lannet%%/*} - - iptables -t filter -A nat_reflection_fwd \ - -s $lannet -d $inthost \ - -p $p $intport \ - -j ACCEPT - ;; - esac - done + [ "$target" = DNAT ] || return + + prepare_chains + + local net + for net in $(find_networks "$dest" 0); do + local intnet + network_get_subnet intnet "$net" || continue + + local proto + config_get proto "$cfg" proto + + local epmin epmax extport + config_get extport "$cfg" src_dport "1-65535" + [ -n "$extport" ] || return + + epmin="${extport%[-:]*}"; epmax="${extport#*[-:]}" + [ "${epmin#!}" != "$epmax" ] || epmax="" + + local ipmin ipmax intport + config_get intport "$cfg" dest_port "$extport" + + ipmin="${intport%[-:]*}"; ipmax="${intport#*[-:]}" + [ "${ipmin#!}" != "$ipmax" ] || ipmax="" + + local exthost + config_get exthost "$cfg" src_dip "$extip" + + local inthost + config_get inthost "$cfg" dest_ip + [ -n "$inthost" ] || return + + [ "$proto" = all ] && proto="tcp udp" + [ "$proto" = tcpudp ] && proto="tcp udp" + + [ "${inthost#!}" = "$inthost" ] || return 0 + [ "${exthost#!}" = "$exthost" ] || return 0 + + [ "${epmin#!}" != "$epmin" ] && \ + extport="! --dport ${epmin#!}${epmax:+:$epmax}" || \ + extport="--dport $epmin${epmax:+:$epmax}" + + [ "${ipmin#!}" != "$ipmin" ] && \ + intport="! --dport ${ipmin#!}${ipmax:+:$ipmax}" || \ + intport="--dport $ipmin${ipmax:+:$ipmax}" + + local p + for p in ${proto:-tcp udp}; do + case "$p" in + tcp|udp|6|17) + iptables -t nat -A nat_reflection_in \ + -s $intnet -d $exthost \ + -p $p $extport \ + -m comment --comment "$INTERFACE" \ + -j DNAT --to $inthost:${ipmin#!}${ipmax:+-$ipmax} + + iptables -t nat -A nat_reflection_out \ + -s $intnet -d $inthost \ + -p $p $intport \ + -m comment --comment "$INTERFACE" \ + -j SNAT --to-source ${intnet%%/*} + + iptables -t filter -A nat_reflection_fwd \ + -s $intnet -d $inthost \ + -p $p $intport \ + -m comment --comment "$INTERFACE" \ + -j ACCEPT + ;; + esac done - } + done } config_load firewall + + local is_masq_zone="$(find_networks "$ZONE" 1)" + [ -n "$is_masq_zone" ] || exit 0 + + local extip + network_get_ipaddr extip "$INTERFACE" || exit 0 + config_foreach setup_fwd redirect fi |