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72 lines
2.2 KiB
72 lines
2.2 KiB
#!/bin/sh
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# miniupnpd integration for firewall3
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IPTABLES="/usr/sbin/iptables"
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IP6TABLES="/usr/sbin/ip6tables"
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IPTARGS="-w 1"
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$IPTABLES -t filter -N MINIUPNPD 2>/dev/null
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$IPTABLES -t nat -N MINIUPNPD 2>/dev/null
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$IPTABLES -t nat -N MINIUPNPD-POSTROUTING 2>/dev/null
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[ -x $IP6TABLES ] && $IP6TABLES -t filter -N MINIUPNPD 2>/dev/null
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. /lib/functions/network.sh
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# helper to insert in chain as penultimate
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iptables_prepend_rule() {
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local iptables="$1"
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local table="$2"
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local chain="$3"
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local target="$4"
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$iptables "$IPTARGS" -t "$table" -I "$chain" $($iptables "$IPTARGS" -t "$table" --line-numbers -nL "$chain" | \
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sed -ne '$s/[^0-9].*//p') -j "$target"
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}
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ADDED=0
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add_extzone_rules() {
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local ext_zone="$1"
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[ -z "$ext_zone" ] && return
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# IPv4 - due to NAT, need to add both to nat and filter table
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# need to insert as penultimate rule for input & forward & postrouting since final rule might be a fw3 REJECT
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iptables_prepend_rule "$IPTABLES" filter "zone_${ext_zone}_input" MINIUPNPD
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iptables_prepend_rule "$IPTABLES" filter "zone_${ext_zone}_forward" MINIUPNPD
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$IPTABLES -t nat -A "zone_${ext_zone}_prerouting" -j MINIUPNPD
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iptables_prepend_rule "$IPTABLES" nat "zone_${ext_zone}_postrouting" MINIUPNPD-POSTROUTING
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# IPv6 if available - filter only
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[ -x $IP6TABLES ] && {
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iptables_prepend_rule "$IP6TABLES" filter "zone_${ext_zone}_input" MINIUPNPD
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iptables_prepend_rule "$IP6TABLES" filter "zone_${ext_zone}_forward" MINIUPNPD
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}
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ADDED=$(($ADDED + 1))
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}
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# By default, user configuration is king.
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for ext_iface in $(uci -q get upnpd.config.external_iface); do
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add_extzone_rules $(fw3 -q network "$ext_iface")
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done
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add_extzone_rules $(uci -q get upnpd.config.external_zone)
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[ "$ADDED" -ne 0 ] && exit 0
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# If really nothing is available, resort to network_find_wan{,6} and
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# assume external interfaces all have same firewall zone.
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# (This heuristic may fail horribly, in case of e.g. multihoming, so
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# please set external_zone in that case!)
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network_find_wan wan_iface
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network_find_wan6 wan6_iface
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for ext_iface in $wan_iface $wan6_iface; do
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# fw3 -q network fails on sub-interfaces => map to device first
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network_get_device ext_device $ext_iface
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add_extzone_rules $(fw3 -q device "$ext_device")
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done
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