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The next OpenWrt stable release aims to use firewall4 by default. As this uses nftables as backend, miniupnpd will no longer work. Create an iptables and nftables variant of the miniupnpd package so that miniupnpd can be used with either firewall variant. See #16818 for more info. Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>
73 lines
2.2 KiB
Bash
73 lines
2.2 KiB
Bash
#!/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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