diff options
Diffstat (limited to 'modules/freifunk/root/etc')
-rw-r--r-- | modules/freifunk/root/etc/firewall.freifunk | 51 | ||||
-rw-r--r-- | modules/freifunk/root/etc/hotplug.d/iface/22-firewall-nat-fix | 61 |
2 files changed, 112 insertions, 0 deletions
diff --git a/modules/freifunk/root/etc/firewall.freifunk b/modules/freifunk/root/etc/firewall.freifunk new file mode 100644 index 0000000000..ac3fcc55df --- /dev/null +++ b/modules/freifunk/root/etc/firewall.freifunk @@ -0,0 +1,51 @@ +#!/bin/sh +# Freifunk Firewall addons +# $Id$ + + +# +# Apply advanced settings +# +apply_advanced() { + local tcp_ecn + local tcp_window_scaling + local accept_redirects + local accept_source_route + + config_get_bool tcp_ecn $1 tcp_ecn 1 + config_get_bool tcp_window_scaling $1 tcp_window_scaling 1 + config_get_bool accept_redirects $1 accept_redirects 0 + config_get_bool accept_source_route $1 accept_source_route 0 + + logger -t firewall.freifunk "tcp_ecn is $tcp_ecn" + logger -t firewall.freifunk "tcp_window_scaling is $tcp_window_scaling" + logger -t firewall.freifunk "accept_redirects is $accept_redirects" + logger -t firewall.freifunk "accept_source_route is $accept_source_route" + + sysctl -w net.ipv4.tcp_ecn=$tcp_ecn >/dev/null + sysctl -w net.ipv4.tcp_window_scaling=$tcp_window_scaling >/dev/null + + for f in /proc/sys/net/ipv4/conf/*/accept_redirects; do + echo $accept_redirects > $f + done + + for f in /proc/sys/net/ipv4/conf/*/accept_source_route; do + echo $accept_source_route > $f + done +} + +config_foreach apply_advanced advanced + + +# +# Apply fixes for masquerading rules +# +apply_nat_fix() { + local up + local ifname + config_get up $1 up + [ -n "$up" ] || return 0 + (ACTION="ifup" INTERFACE="$1" . /etc/hotplug.d/iface/22-firewall-nat-fix ) +} + +config_foreach apply_nat_fix interface diff --git a/modules/freifunk/root/etc/hotplug.d/iface/22-firewall-nat-fix b/modules/freifunk/root/etc/hotplug.d/iface/22-firewall-nat-fix new file mode 100644 index 0000000000..634f432f08 --- /dev/null +++ b/modules/freifunk/root/etc/hotplug.d/iface/22-firewall-nat-fix @@ -0,0 +1,61 @@ +. /lib/firewall/uci_firewall.sh +unset ZONE +config_get ifname $INTERFACE ifname +[ "$ifname" == "lo" ] && exit 0 + +load_zones() { + local name + local network + config_get name $1 name + config_get network $1 network + [ -z "$network" ] && network=$name + for n in $network; do + [ "$n" = "$INTERFACE" ] && ZONE="$ZONE $name" + done +} + +config_foreach load_zones zone + +[ -z "$ZONE" ] && exit 0 + +natfix_addr_add() { + local network=$1 + local iface=$2 + + config_get parent "$1" interface + [ "$network" != "$INTERFACE" -a "$parent" != "$INTERFACE" ] && return 0 + + config_get ipaddr "$network" ipaddr + [ -n "$ipaddr" ] || return 0 + config_get netmask "$network" netmask + [ -n "$netmask" ] || return 0 + eval "$(ipcalc.sh $ipaddr $netmask)" + + logger -t firewall.freifunk "adding nat rule for $iface($NETWORK/$PREFIX)" + iptables -t nat -A "natfix_$iface" -s "$NETWORK/$PREFIX" -d "$NETWORK/$PREFIX" -j ACCEPT +} + +[ ifup = "$ACTION" ] && { + iptables -t nat -N "natfix_$ifname" + natfix_addr_add "$INTERFACE" "$ifname" + config_foreach natfix_addr_add alias "$ifname" + + for z in $ZONE; do + local loaded + config_get loaded core loaded + [ -n "$loaded" ] && { + logger -t firewall.freifunk "applying nat rules on zone $z" + iptables -t nat -I "zone_${z}_nat" 1 -o "$ifname" -j "natfix_$ifname" + } + done +} + +[ ifdown = "$ACTION" ] && { + for z in $ZONE; do + local up + config_get up $z up + iptables -t nat -D "zone_${z}_nat" -o "$ifname" -j "natfix_$ifname" 2>/dev/null + done + iptables -t nat -F "natfix_$ifname" 2>/dev/null + iptables -t nat -X "natfix_$ifname" 2>/dev/null +} |