#!/bin/sh
-# Setup NAT reflection rules
. /etc/functions.sh
-if [ "$ACTION" = "ifup" ] && [ "$INTERFACE" = "wan" ]; then
+if [ "$ACTION" = "add" ] && [ "$INTERFACE" = "wan" ]; then
local wanip=$(uci -P/var/state get network.wan.ipaddr)
iptables -t nat -F nat_reflection_in 2>/dev/null || {
iptables -t nat -A postrouting_rule -j nat_reflection_out
}
- setup_fwd() {
- local cfg="$1"
-
- local src
- config_get src "$cfg" src
-
- [ "$src" = wan ] && {
- local dest
- config_get dest "$cfg" dest "lan"
-
- local lanip=$(uci -P/var/state get network.$dest.ipaddr)
- local lanmk=$(uci -P/var/state get network.$dest.netmask)
+ 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
+ }
- local proto
- config_get proto "$cfg" proto
+ find_networks() {
+ find_networks_cb() {
+ local cfg="$1"
+ local zone="$2"
- local epmin epmax extport
- config_get extport "$cfg" src_dport
- [ -n "$extport" ] || return
+ local name
+ config_get name "$cfg" name
- epmin="${extport%[-:]*}"; epmax="${extport#*[-:]}"
- [ "$epmin" != "$epmax" ] || epmax=""
+ [ "$name" = "$zone" ] && {
+ local network
+ config_get network "$cfg" network
- local ipmin ipmax intport
- config_get intport "$cfg" dest_port "$extport"
+ echo ${network:-$zone}
+ return 1
+ }
+ }
- ipmin="${intport%[-:]*}"; ipmax="${intport#*[-:]}"
- [ "$ipmin" != "$ipmax" ] || ipmax=""
+ config_foreach find_networks_cb zone "$1"
+ }
- local exthost
- config_get exthost "$cfg" src_dip "$wanip"
+ setup_fwd() {
+ local cfg="$1"
- local inthost
- config_get inthost "$cfg" dest_ip
- [ -n "$inthost" ] || return
+ local reflection
+ config_get_bool reflection "$cfg" reflection 1
+ [ "$reflection" == 1 ] || return
- [ "$proto" = tcpudp ] && proto="tcp udp"
+ local src
+ config_get src "$cfg" src
- local p
- for p in ${proto:-tcp udp}; do
- case "$p" in
- tcp|udp)
- iptables -t nat -A nat_reflection_in \
- -s $lanip/$lanmk -d $exthost \
- -p $p --dport $epmin${epmax:+:$epmax} \
- -j DNAT --to $inthost:$ipmin${ipmax:+-$ipmax}
+ local target
+ config_get target "$cfg" target DNAT
- iptables -t nat -A nat_reflection_out \
- -s $lanip/$lanmk -d $inthost \
- -p $p --dport $ipmin${ipmax:+:$ipmax} \
- -j SNAT --to-source $lanip
- ;;
- esac
+ [ "$src" = wan ] && [ "$target" = DNAT ] && {
+ local dest
+ config_get dest "$cfg" dest "lan"
+ [ "$dest" != "*" ] || return
+
+ local net
+ for net in $(find_networks "$dest"); do
+ local lanip=$(uci -P/var/state get network.$net.ipaddr)
+ local lanmk=$(uci -P/var/state get network.$net.netmask)
+
+ local proto
+ config_get proto "$cfg" proto
+
+ local epmin epmax extport
+ config_get extport "$cfg" src_dport
+ [ -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" = 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 $lanip/$lanmk -d $exthost \
+ -p $p $extport \
+ -j DNAT --to $inthost:${ipmin#!}${ipmax:+-$ipmax}
+
+ iptables -t nat -A nat_reflection_out \
+ -s $lanip/$lanmk -d $inthost \
+ -p $p $intport \
+ -j SNAT --to-source $lanip
+
+ iptables -t filter -A nat_reflection_fwd \
+ -s $lanip/$lanmk -d $inthost \
+ -p $p $intport \
+ -j ACCEPT
+ ;;
+ esac
+ done
done
}
}
config_load firewall
config_foreach setup_fwd redirect
fi
-
projects / openwrt.git / blobdiff