firewall: - replace uci firewall with a modular dual stack implementation developed by Malte S. Stretz - bump version to 2
SVN-Revision: 21286master
Jo-Philipp Wich
14 years ago
parent
085b2b9ad6
commit
c284cb51c0
@ -1,5 +0,0 @@ |
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. /lib/firewall/uci_firewall.sh |
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unset ZONE |
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config_get ifname $INTERFACE ifname |
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[ "$ifname" == "lo" ] && exit 0 |
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fw_event "$ACTION" "$INTERFACE" |
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@ -0,0 +1,49 @@ |
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#!/bin/sh |
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FW_LIBDIR=/lib/firewall |
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|
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. /etc/functions.sh |
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. ${FW_LIBDIR}/fw.sh |
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|
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case "$(type fw)" in |
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*function) ;; |
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*) exit 255;; |
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esac |
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|
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usage() { |
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echo $0 "<command>" "<family>" "<table>" "<chain>" "<target>" "{" "<rules>" "}" |
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exit 0 |
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} |
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|
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cmd=$1 |
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shift |
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case "$cmd" in |
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--help|help) usage ;; |
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start|stop|reload|restart) |
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. ${FW_LIBDIR}/core.sh |
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fw_$cmd |
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exit $? |
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;; |
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esac |
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|
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fam=$1 |
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shift |
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case "$fam" in |
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ip) |
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fam=i |
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if [ $# -gt 2 ]; then |
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for p in $(seq 2 $(($# - 1))); do |
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if eval "[ \$$p == '}' ]"; then |
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fam=I |
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break |
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fi |
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done |
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fi ;; |
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ip4) fam=4 ;; |
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ip6) fam=6 ;; |
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arp) fam=a ;; |
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eth) fam=e ;; |
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-*) exec $0 $cmd ${fam##*-} "$@" ;; |
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esac |
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|
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fw "$cmd" "$fam" "$@" |
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exit $? |
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@ -0,0 +1,19 @@ |
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#!/bin/sh |
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# This script is executed as part of the hotplug event with |
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# HOTPLUG_TYPE=iface, triggered by various scripts when an interface |
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# is configured (ACTION=ifup) or deconfigured (ACTION=ifdown). The |
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# interface is available as INTERFACE, the real device as DEVICE. |
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. /etc/functions.sh |
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|
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[ "$DEVICE" == "lo" ] && exit 0 |
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|
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. /lib/firewall/core.sh |
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fw_is_loaded || exit 0 |
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fw_init |
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|
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case "$ACTION" in |
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ifup) |
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fw_configure_interface "$INTERFACE" add "$DEVICE" ;; |
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ifdown) |
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fw_configure_interface "$INTERFACE" del "$DEVICE" ;; |
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esac |
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@ -0,0 +1,97 @@ |
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# Copyright (C) 2009-2010 OpenWrt.org |
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# Copyright (C) 2009 Malte S. Stretz <http://msquadrat.de> |
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# |
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# This is a temporary file, I hope to have some of this stuff merged into |
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# /lib/functions.sh (without the fw_ prefix of course) one day. |
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|
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fw_config_append() { # <package> |
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CONFIG_APPEND=1 config_load "$@" |
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unset CONFIG_APPEND |
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} |
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|
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fw_config_once() { # <function> <type> |
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local func=$1 |
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local type=$2 |
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shift 2 |
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|
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local config=cfg00nil |
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fw_config__once() { |
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config=$1 |
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} |
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config_foreach fw_config__once "$type" |
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|
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$func $config "$@" |
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} |
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|
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fw_config_get_section() { # <config> <prefix> <type> <name> <default> ... |
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local config=$1 |
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local prefix=$2 |
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shift 2 |
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|
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[ -n "$config" ] || return 1 |
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[ -n "$prefix" ] && { |
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prefix="${prefix}_" |
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export ${NO_EXPORT:+-n} -- "${prefix}NAME"="${config}" |
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config_get "${prefix}TYPE" "$config" TYPE |
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} |
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|
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[ "$1" == '{' ] && shift |
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while [ $# -ge 3 ]; do |
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local type=$1 |
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local name=$2 |
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local dflt=$3 |
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shift 3 |
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# TODO: Move handling of defaults to /lib/functions.sh |
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# and get replace the case block with the following |
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# two lines: |
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# type=${type#string} |
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# config_get${type:+_${type}} "${prefix}${name}" "$config" "$name" "$dflt" || return |
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case "$type" in |
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string) |
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local tmp |
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config_get tmp "$config" "$name" || return |
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[ -z "$tmp" ] && tmp=$dflt |
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export ${NO_EXPORT:+-n} -- "${prefix}${name}=${tmp}" |
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continue |
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;; |
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boolean) |
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type=bool |
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;; |
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esac; |
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|
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local cmd=${prefix}config_get_${type} |
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type $cmd > /dev/null || { |
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cmd=config_get_${type} |
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} |
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type $cmd > /dev/null || { |
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echo "config type $type (for $name) not supported" >&2 |
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return 1 |
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} |
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$cmd "${prefix}${name}" "$config" "$name" "$dflt" || return |
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done |
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} |
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|
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config_get_ipaddr() { |
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local varn=$1 |
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local conf=$2 |
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local name=$3 |
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local dflt=$4 |
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|
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local addr |
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config_get addr "$conf" "$name" || return |
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[ -n "$addr" ] || addr=$dflt |
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|
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local mask=${addr#*/} |
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[ "$mask" != "$addr" ] || mask= |
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addr=${addr%/*} |
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|
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local vers= |
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case "$addr" in |
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*.*) vers=4 ;; |
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*:*) vers=6 ;; |
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esac |
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|
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export ${NO_EXPORT:+-n} -- "${varn}=${addr}" |
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export ${NO_EXPORT:+-n} -- "${varn}_prefixlen=${mask}" |
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export ${NO_EXPORT:+-n} -- "${varn}_version=${vers}" |
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} |
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@ -0,0 +1,136 @@ |
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# Copyright (C) 2009-2010 OpenWrt.org |
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|
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FW_LIBDIR=${FW_LIBDIR:-/lib/firewall} |
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|
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. $FW_LIBDIR/fw.sh |
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include /lib/network |
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|
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fw_start() { |
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fw_init |
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|
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FW_DEFAULTS_APPLIED= |
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|
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fw_is_loaded && { |
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echo "firewall already loaded" >&2 |
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exit 1 |
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} |
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uci_set_state firewall core "" firewall_state |
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|
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fw_clear DROP |
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|
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fw_callback pre core |
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|
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echo "Loading defaults" |
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fw_config_once fw_load_defaults defaults |
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|
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echo "Loading zones" |
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config_foreach fw_load_zone zone |
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|
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echo "Loading forwardings" |
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config_foreach fw_load_forwarding forwarding |
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|
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echo "Loading redirects" |
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config_foreach fw_load_redirect redirect |
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|
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echo "Loading rules" |
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config_foreach fw_load_rule rule |
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|
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echo "Loading includes" |
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config_foreach fw_load_include include |
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|
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[ -n "$FW_NOTRACK_DISABLED" ] && { |
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echo "Optimizing conntrack" |
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config_foreach fw_load_notrack_zone zone |
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} |
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|
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echo "Loading interfaces" |
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config_foreach fw_configure_interface interface add |
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fw_callback post core |
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uci_set_state firewall core loaded 1 |
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} |
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|
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fw_stop() { |
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fw_init |
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|
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fw_callback pre stop |
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|
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fw_clear ACCEPT |
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|
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fw_callback post stop |
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|
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uci_revert_state firewall |
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config_clear |
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unset FW_INITIALIZED |
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} |
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|
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fw_restart() { |
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fw_stop |
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fw_start |
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} |
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|
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fw_reload() { |
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fw_restart |
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} |
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|
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fw_is_loaded() { |
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local bool |
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config_get_bool bool core loaded 0 |
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return $((! $bool)) |
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} |
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|
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|
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fw_die() { |
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echo "Error:" "$@" >&2 |
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fw_log error "$@" |
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fw_stop |
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exit 1 |
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} |
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|
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fw_log() { |
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local level="$1" |
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[ -n "$2" ] || { |
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shift |
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level=notice |
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} |
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logger -t firewall -p user.$level "$@" |
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} |
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|
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fw_init() { |
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[ -z "$FW_INITIALIZED" ] || return 0 |
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. $FW_LIBDIR/config.sh |
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scan_interfaces |
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fw_config_append firewall |
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local hooks="core stop defaults zone notrack synflood" |
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local file lib hk pp |
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for file in $FW_LIBDIR/core_*.sh; do |
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. $file |
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hk=$(basename $file .sh) |
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hk=${hk#core_} |
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append hooks $hk |
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done |
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for file in $FW_LIBDIR/*.sh; do |
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lib=$(basename $file .sh) |
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lib=${lib##[0-9][0-9]_} |
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case $lib in |
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core*|fw|config|uci_firewall) continue ;; |
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esac |
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. $file |
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for hk in $hooks; do |
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for pp in pre post; do |
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type ${lib}_${pp}_${hk}_cb >/dev/null && |
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append FW_CB_${pp}_${hk} ${lib} |
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done |
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done |
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done |
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fw_callback post init |
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FW_INITIALIZED=1 |
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return 0 |
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} |
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@ -0,0 +1,40 @@ |
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# Copyright (C) 2009-2010 OpenWrt.org |
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|
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fw_config_get_forwarding() { |
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[ "${forwarding_NAME}" != "$1" ] || return |
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fw_config_get_section "$1" forwarding { \ |
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string _name "$1" \ |
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string name "" \ |
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string src "" \ |
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string dest "" \ |
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} || return |
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[ -n "$forwarding_name" ] || forwarding_name=$forwarding__name |
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} |
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fw_load_forwarding() { |
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fw_config_get_forwarding "$1" |
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fw_callback pre forwarding |
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local chain=forward |
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[ -n "$forwarding_src" ] && { |
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chain=zone_${forwarding_src}_forward |
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} |
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local target=ACCEPT |
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[ -n "$forwarding_dest" ] && { |
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target=zone_${forwarding_dest}_ACCEPT |
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} |
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fw add i f $chain $target ^ |
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# propagate masq zone flag |
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[ -n "$forwarding_src" ] && list_contains CONNTRACK_ZONES $forwarding_src && { |
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append CONNTRACK_ZONES $forwarding_dest |
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} |
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[ -n "$forwarding_dest" ] && list_contains CONNTRACK_ZONES $forwarding_dest && { |
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append CONNTRACK_ZONES $forwarding_src |
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} |
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fw_callback post forwarding |
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} |
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@ -0,0 +1,258 @@ |
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# Copyright (C) 2009-2010 OpenWrt.org |
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# Copyright (C) 2008 John Crispin <blogic@openwrt.org> |
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FW_INITIALIZED= |
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FW_ZONES= |
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FW_CONNTRACK_ZONES= |
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FW_NOTRACK_DISABLED= |
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FW_DEFAULTS_APPLIED= |
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FW_ADD_CUSTOM_CHAINS= |
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FW_ACCEPT_REDIRECTS= |
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FW_ACCEPT_SRC_ROUTE= |
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FW_DEFAULT_INPUT_POLICY=REJECT |
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FW_DEFAULT_OUTPUT_POLICY=REJECT |
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FW_DEFAULT_FORWARD_POLICY=REJECT |
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fw_load_defaults() { |
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fw_config_get_section "$1" defaults { \ |
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string input $FW_DEFAULT_INPUT_POLICY \ |
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string output $FW_DEFAULT_OUTPUT_POLICY \ |
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string forward $FW_DEFAULT_FORWARD_POLICY \ |
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boolean drop_invalid 0 \ |
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boolean syn_flood 0 \ |
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boolean synflood_protect 0 \ |
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string synflood_rate 25 \ |
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string synflood_burst 50 \ |
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boolean tcp_syncookies 1 \ |
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boolean tcp_ecn 0 \ |
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boolean tcp_westwood 0 \ |
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boolean tcp_window_scaling 1 \ |
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boolean accept_redirects 0 \ |
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boolean accept_source_route 0 \ |
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boolean custom_chains 1 \ |
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} || return |
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[ -n "$FW_DEFAULTS_APPLIED" ] && { |
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echo "Error: multiple defaults sections detected" |
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return 1 |
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} |
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FW_DEFAULTS_APPLIED=1 |
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FW_DEFAULT_INPUT_POLICY=$defaults_input |
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FW_DEFAULT_OUTPUT_POLICY=$defaults_output |
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FW_DEFAULT_FORWARD_POLICY=$defaults_forward |
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FW_ADD_CUSTOM_CHAINS=$defaults_custom_chains |
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FW_ACCEPT_REDIRECTS=$defaults_accept_redirects |
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FW_ACCEPT_SRC_ROUTE=$defaults_accept_source_route |
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fw_callback pre defaults |
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# Seems like there are only one sysctl for both IP versions. |
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for s in syncookies ecn westwood window_scaling; do |
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eval "sysctl -e -w net.ipv4.tcp_${s}=\$defaults_tcp_${s}" >/dev/null |
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done |
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fw_sysctl_interface all |
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|
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[ $defaults_drop_invalid == 1 ] && { |
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fw add i f INPUT DROP { -m state --state INVALID } |
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fw add i f OUTPUT DROP { -m state --state INVALID } |
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fw add i f FORWARD DROP { -m state --state INVALID } |
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FW_NOTRACK_DISABLED=1 |
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} |
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|
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fw add i f INPUT ACCEPT { -m state --state RELATED,ESTABLISHED } |
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fw add i f OUTPUT ACCEPT { -m state --state RELATED,ESTABLISHED } |
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fw add i f FORWARD ACCEPT { -m state --state RELATED,ESTABLISHED } |
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fw add i f INPUT ACCEPT { -i lo } |
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fw add i f OUTPUT ACCEPT { -o lo } |
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# Compatibility to old 'syn_flood' parameter |
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[ $defaults_syn_flood == 1 ] && \ |
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defaults_synflood_protect=1 |
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[ $defaults_synflood_protect == 1 ] && { |
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echo "Loading synflood protection" |
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fw_callback pre synflood |
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fw add i f syn_flood |
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fw add i f syn_flood RETURN { \ |
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-p tcp --syn \ |
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-m limit --limit "${defaults_synflood_rate}/second" --limit-burst "${defaults_synflood_burst}" \ |
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} |
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fw add i f syn_flood DROP |
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fw add i f INPUT syn_flood { -p tcp --syn } |
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fw_callback post synflood |
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} |
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[ $defaults_custom_chains == 1 ] && { |
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echo "Adding custom chains" |
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fw add i f input_rule |
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fw add i f output_rule |
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fw add i f forwarding_rule |
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fw add i n prerouting_rule |
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fw add i n postrouting_rule |
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|
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fw add i f INPUT input_rule |
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fw add i f OUTPUT output_rule |
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fw add i f FORWARD forwarding_rule |
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fw add i n PREROUTING prerouting_rule |
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fw add i n POSTROUTING postrouting_rule |
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} |
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|
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fw add i f input |
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fw add i f output |
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fw add i f forward |
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|
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fw add i f INPUT input |
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fw add i f OUTPUT output |
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fw add i f FORWARD forward |
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|
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fw add i f reject |
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fw add i f reject REJECT { --reject-with tcp-reset -p tcp } |
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fw add i f reject REJECT { --reject-with port-unreach } |
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|
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fw_set_filter_policy |
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fw_callback post defaults |
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} |
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fw_config_get_zone() { |
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[ "${zone_NAME}" != "$1" ] || return |
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fw_config_get_section "$1" zone { \ |
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string name "$1" \ |
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string network "" \ |
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string input "$FW_DEFAULT_INPUT_POLICY" \ |
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string output "$FW_DEFAULT_OUTPUT_POLICY" \ |
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string forward "$FW_DEFAULT_FORWARD_POLICY" \ |
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boolean masq 0 \ |
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boolean conntrack 0 \ |
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boolean mtu_fix 0 \ |
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boolean custom_chains "$FW_ADD_CUSTOM_CHAINS" \ |
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} || return |
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[ -n "$zone_name" ] || zone_name=$zone_NAME |
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[ -n "$zone_network" ] || zone_network=$zone_name |
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} |
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fw_load_zone() { |
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fw_config_get_zone "$1" |
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list_contains FW_ZONES $zone_name && { |
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fw_die "zone ${zone_name}: duplicated zone" |
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} |
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append FW_ZONES $zone_name |
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fw_callback pre zone |
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[ $zone_conntrack = 1 -o $zone_masq = 1 ] && \ |
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append FW_CONNTRACK_ZONES "$zone_NAME" |
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local chain=zone_${zone_name} |
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|
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fw add i f ${chain}_ACCEPT |
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fw add i f ${chain}_DROP |
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fw add i f ${chain}_REJECT |
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fw add i f ${chain}_MSSFIX |
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|
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# TODO: Rename to ${chain}_input |
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fw add i f ${chain} |
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fw add i f ${chain} ${chain}_${zone_input} $ |
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|
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fw add i f ${chain}_forward |
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fw add i f ${chain}_forward ${chain}_${zone_forward} $ |
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|
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# TODO: add ${chain}_output |
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fw add i f output ${chain}_${zone_output} $ |
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|
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# TODO: Rename to ${chain}_MASQUERADE |
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fw add i n ${chain}_nat |
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fw add i n ${chain}_prerouting |
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|
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fw add i r ${chain}_notrack |
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[ $zone_masq == 1 ] && \ |
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fw add i n POSTROUTING ${chain}_nat $ |
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|
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[ $zone_mtu_fix == 1 ] && \ |
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fw add i f FORWARD ${chain}_MSSFIX ^ |
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|
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[ $zone_custom_chains == 1 ] && { |
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[ $FW_ADD_CUSTOM_CHAINS == 1 ] || \ |
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fw_die "zone ${zone_name}: custom_chains globally disabled" |
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|
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fw add i f input_${zone_name} |
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fw add i f ${chain} input_${zone_name} ^ |
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|
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fw add i f forwarding_${zone_name} |
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fw add i f ${chain}_forward forwarding_${zone_name} ^ |
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|
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fw add i n prerouting_${zone_name} |
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fw add i n ${chain}_prerouting prerouting_${zone_name} ^ |
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} |
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|
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fw_callback post zone |
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} |
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fw_load_notrack_zone() { |
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list_contains FW_CONNTRACK_ZONES "$1" && return |
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fw_config_get_zone "$1" |
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|
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fw_callback pre notrack |
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|
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fw add i f zone_${zone_name}_notrack NOTRACK $ |
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|
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fw_callback post notrack |
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} |
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|
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|
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fw_load_include() { |
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local name="$1" |
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|
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local path; config_get path ${name} path |
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[ -e $path ] && . $path |
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} |
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|
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|
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fw_clear() { |
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local policy=$1 |
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|
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fw_set_filter_policy $policy |
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|
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local tab |
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for tab in f n r; do |
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fw del i $tab |
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done |
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} |
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|
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fw_set_filter_policy() { |
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local policy=$1 |
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|
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local chn tgt |
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for chn in INPUT OUTPUT FORWARD; do |
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eval "tgt=\${policy:-\${FW_DEFAULT_${chn}_POLICY}}" |
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[ $tgt == "REJECT" ] && tgt=reject |
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[ $tgt == "ACCEPT" -o $tgt == "DROP" ] || { |
||||
fw add i f $chn $tgt $ |
||||
tgt=DROP |
||||
} |
||||
fw policy i f $chn $tgt |
||||
done |
||||
} |
||||
|
||||
|
||||
fw_callback() { |
||||
local pp=$1 |
||||
local hk=$2 |
||||
|
||||
local libs lib |
||||
eval "libs=\$FW_CB_${pp}_${hk}" |
||||
[ -n "$libs" ] || return |
||||
for lib in $libs; do |
||||
${lib}_${pp}_${hk}_cb |
||||
done |
||||
} |
||||
@ -0,0 +1,86 @@ |
||||
# Copyright (C) 2009-2010 OpenWrt.org |
||||
|
||||
fw_configure_interface() { |
||||
local iface=$1 |
||||
local action=$2 |
||||
local ifname=$3 |
||||
|
||||
local status; |
||||
config_get_bool status "$iface" up "0" |
||||
[ "$status" == 1 ] || return 0 |
||||
|
||||
[ -n "$ifname" ] || { |
||||
config_get ifname "$iface" ifname |
||||
ifname=${ifname:-$iface} |
||||
} |
||||
[ "$ifname" == "lo" ] && return 0 |
||||
|
||||
fw_callback pre interface |
||||
|
||||
fw__do_rules() { |
||||
local action=$1 |
||||
local chain=$2 |
||||
local ifname=$3 |
||||
|
||||
fw $action i f ${chain}_ACCEPT ACCEPT ^ { -o "$ifname" } |
||||
fw $action i f ${chain}_ACCEPT ACCEPT ^ { -i "$ifname" } |
||||
fw $action i f ${chain}_DROP DROP ^ { -o "$ifname" } |
||||
fw $action i f ${chain}_DROP DROP ^ { -i "$ifname" } |
||||
fw $action i f ${chain}_REJECT reject ^ { -o "$ifname" } |
||||
fw $action i f ${chain}_REJECT reject ^ { -i "$ifname" } |
||||
|
||||
fw $action i n ${chain}_nat MASQUERADE ^ { -o "$ifname" } |
||||
fw $action i f ${chain}_MSSFIX TCPMSS ^ { -o "$ifname" -p tcp --tcp-flags SYN,RST SYN --clamp-mss-to-pmtu } |
||||
|
||||
fw $action i f input ${chain} $ { -i "$ifname" } |
||||
fw $action i f forward ${chain}_forward $ { -i "$ifname" } |
||||
fw $action i n PREROUTING ${chain}_prerouting ^ { -i "$ifname" } |
||||
fw $action i r PREROUTING ${chain}_notrack ^ { -i "$ifname" } |
||||
} |
||||
|
||||
local old_zones old_ifname |
||||
config_get old_zones core "${iface}_zone" |
||||
[ -n "$old_zones" ] && { |
||||
config_get old_ifname core "${iface}_ifname" |
||||
for z in $old_zones; do |
||||
fw_log info "removing $iface ($old_ifname) from zone $z" |
||||
fw__do_rules del zone_$z $old_ifname |
||||
|
||||
ACTION=remove ZONE="$z" INTERFACE="$iface" DEVICE="$ifname" /sbin/hotplug-call firewall |
||||
done |
||||
uci_revert_state firewall core "${iface}_zone" |
||||
uci_revert_state firewall core "${iface}_ifname" |
||||
} |
||||
[ "$action" == del ] && return |
||||
|
||||
local new_zones |
||||
load_zone() { |
||||
fw_config_get_zone "$1" |
||||
list_contains zone_network "$iface" || return |
||||
|
||||
fw_log info "adding $iface ($ifname) to zone $zone_name" |
||||
fw__do_rules add zone_${zone_name} "$ifname" |
||||
append new_zones $zone_name |
||||
|
||||
ACTION=add ZONE="$zone_name" INTERFACE="$iface" DEVICE="$ifname" /sbin/hotplug-call firewall |
||||
} |
||||
config_foreach load_zone zone |
||||
|
||||
uci_set_state firewall core "${iface}_zone" "$new_zones" |
||||
uci_set_state firewall core "${iface}_ifname" "$ifname" |
||||
|
||||
fw_sysctl_interface $ifname |
||||
|
||||
fw_callback post interface |
||||
} |
||||
|
||||
fw_sysctl_interface() { |
||||
local ifname=$1 |
||||
{ |
||||
sysctl -w net.ipv4.conf.${ifname}.accept_redirects=$FW_ACCEPT_REDIRECTS |
||||
sysctl -w net.ipv6.conf.${ifname}.accept_redirects=$FW_ACCEPT_REDIRECTS |
||||
sysctl -w net.ipv4.conf.${ifname}.accept_source_route=$FW_ACCEPT_SRC_ROUTE |
||||
sysctl -w net.ipv6.conf.${ifname}.accept_source_route=$FW_ACCEPT_SRC_ROUTE |
||||
} >/dev/null 2>/dev/null |
||||
} |
||||
|
||||
@ -0,0 +1,61 @@ |
||||
# Copyright (C) 2009-2010 OpenWrt.org |
||||
|
||||
fw_config_get_redirect() { |
||||
[ "${redirect_NAME}" != "$1" ] || return |
||||
fw_config_get_section "$1" redirect { \ |
||||
string _name "$1" \ |
||||
string name "" \ |
||||
string src "" \ |
||||
ipaddr src_ip "" \ |
||||
ipaddr src_dip "" \ |
||||
string src_mac "" \ |
||||
string src_port "" \ |
||||
string src_dport "" \ |
||||
string dest "" \ |
||||
ipaddr dest_ip "" \ |
||||
string dest_mac "" \ |
||||
string dest_port "" \ |
||||
string proto "tcpudp" \ |
||||
} || return |
||||
[ -n "$redirect_name" ] || redirect_name=$redirect__name |
||||
} |
||||
|
||||
fw_load_redirect() { |
||||
fw_config_get_redirect "$1" |
||||
|
||||
fw_callback pre redirect |
||||
|
||||
[ -n "$redirect_src" -a -n "$redirect_dest_ip" ] || { |
||||
fw_die "redirect ${redirect_name}: needs src and dest_ip" |
||||
} |
||||
|
||||
local nat_dest_port=$redirect_dest_port |
||||
redirect_dest_port=$(fw_get_port_range $redirect_dest_port) |
||||
redirect_src_port=$(fw_get_port_range $redirect_src_port) |
||||
redirect_src_dport=$(fw_get_port_range $redirect_src_dport) |
||||
local fwd_dest_port=${redirect_dest_port:-$redirect_src_dport} |
||||
|
||||
[ "$redirect_proto" == "tcpudp" ] && redirect_proto="tcp udp" |
||||
for redirect_proto in $redirect_proto; do |
||||
fw add I n zone_${redirect_src}_prerouting DNAT $ { $redirect_src_ip $redirect_dest_ip } { \ |
||||
${redirect_proto:+-p $redirect_proto} \ |
||||
${redirect_src_ip:+-s $redirect_src_ip} \ |
||||
${redirect_src_dip:+-d $redirect_src_dip} \ |
||||
${redirect_src_port:+--sport $redirect_src_port} \ |
||||
${redirect_src_dport:+--dport $redirect_src_dport} \ |
||||
${redirect_src_mac:+-m mac --mac-source $redirect_src_mac} \ |
||||
--to-destination ${redirect_dest_ip}${redirect_dest_port:+:$nat_dest_port} \ |
||||
} |
||||
|
||||
fw add I f zone_${redirect_src}_forward ACCEPT ^ { $redirect_src_ip $redirect_dest_ip } { \ |
||||
-d $redirect_dest_ip \ |
||||
${redirect_proto:+-p $redirect_proto} \ |
||||
${redirect_src_ip:+-s $redirect_src_ip} \ |
||||
${redirect_src_port:+--sport $redirect_src_port} \ |
||||
${fwd_dest_port:+--dport $fwd_dest_port} \ |
||||
${redirect_src_mac:+-m mac --mac-source $redirect_src_mac} \ |
||||
} |
||||
done |
||||
|
||||
fw_callback post redirect |
||||
} |
||||
@ -0,0 +1,66 @@ |
||||
# Copyright (C) 2009-2010 OpenWrt.org |
||||
|
||||
fw_config_get_rule() { |
||||
[ "${rule_NAME}" != "$1" ] || return |
||||
fw_config_get_section "$1" rule { \ |
||||
string _name "$1" \ |
||||
string name "" \ |
||||
string src "" \ |
||||
ipaddr src_ip "" \ |
||||
string src_mac "" \ |
||||
string src_port "" \ |
||||
string dest "" \ |
||||
ipaddr dest_ip "" \ |
||||
string dest_mac "" \ |
||||
string dest_port "" \ |
||||
string icmp_type "" \ |
||||
string proto "tcpudp" \ |
||||
string target "" \ |
||||
} || return |
||||
[ -n "$rule_name" ] || rule_name=$rule__name |
||||
[ "$rule_proto" == "icmp" ] || rule_icmp_type= |
||||
} |
||||
|
||||
fw_load_rule() { |
||||
fw_config_get_rule "$1" |
||||
|
||||
fw_callback pre rule |
||||
|
||||
rule_src_port=$(fw_get_port_range $rule_src_port) |
||||
rule_dest_port=$(fw_get_port_range $rule_dest_port) |
||||
|
||||
local chain=input |
||||
[ -n "$rule_src" ] && { |
||||
[ -z "$rule_dest" ] && { |
||||
chain=zone_${rule_src} |
||||
} || { |
||||
chain=zone_${rule_src}_forward |
||||
} |
||||
} |
||||
|
||||
local target=$rule_target |
||||
[ -z "$target" ] && { |
||||
target=REJECT |
||||
} |
||||
[ -n "$dest" ] && { |
||||
target=zone_${rule_dest}_${target} |
||||
} |
||||
|
||||
local rule_pos |
||||
eval 'rule_pos=$((++FW__RULE_COUNT_'$chain'))' |
||||
|
||||
[ "$rule_proto" == "tcpudp" ] && rule_proto="tcp udp" |
||||
for rule_proto in $rule_proto; do |
||||
fw add I f $chain $target $rule_pos { $rule_src_ip $rule_dest_ip } { \ |
||||
${rule_proto:+-p $rule_proto} \ |
||||
${rule_src_ip:+-s $rule_src_ip} \ |
||||
${rule_src_port:+--sport $rule_src_port} \ |
||||
${rule_src_mac:+-m mac --mac-source $rule_src_mac} \ |
||||
${rule_dest_ip:+-d $rule_dest_ip} \ |
||||
${rule_dest_port:+--dport $rule_dest_port} \ |
||||
${rule_icmp_type:+--icmp-type $rule_icmp_type} \ |
||||
} |
||||
done |
||||
|
||||
fw_callback post rule |
||||
} |
||||
@ -0,0 +1,182 @@ |
||||
# Copyright (C) 2009-2010 OpenWrt.org |
||||
# Copyright (C) 2009 Malte S. Stretz |
||||
|
||||
export FW_4_ERROR=0 |
||||
export FW_6_ERROR=0 |
||||
export FW_i_ERROR=0 |
||||
export FW_e_ERROR=0 |
||||
export FW_a_ERROR=0 |
||||
|
||||
#TODO: remove this |
||||
[ "${-#*x}" == "$-" ] && { |
||||
fw() { |
||||
fw__exec "$@" |
||||
} |
||||
} || { |
||||
fw() { |
||||
local os=$- |
||||
set +x |
||||
fw__exec "$@" |
||||
local rc=$? |
||||
set -$os |
||||
return $rc |
||||
} |
||||
} |
||||
|
||||
fw__exec() { # <action> <family> <table> <chain> <target> <position> { <rules> } |
||||
local cmd fam tab chn tgt pos |
||||
local i |
||||
for i in cmd fam tab chn tgt pos; do |
||||
if [ "$1" -a "$1" != '{' ]; then |
||||
eval "$i='$1'" |
||||
shift |
||||
else |
||||
eval "$i=-" |
||||
fi |
||||
done |
||||
|
||||
fw__rc() { |
||||
export FW_${fam}_ERROR=$1 |
||||
return $1 |
||||
} |
||||
|
||||
fw__dualip() { |
||||
fw $cmd 4 $tab $chn $tgt $pos "$@" |
||||
fw $cmd 6 $tab $chn $tgt $pos "$@" |
||||
fw__rc $((FW_4_ERROR | FW_6_ERROR)) |
||||
} |
||||
|
||||
fw__autoip() { |
||||
local ip4 ip6 |
||||
shift |
||||
while [ "$1" != '}' ]; do |
||||
case "$1" in |
||||
*.*.*.*) ip4=1 ;; |
||||
*:*) ip6=1 ;; |
||||
esac |
||||
shift |
||||
done |
||||
shift |
||||
if [ "${ip4:-4}" == "${ip6:-6}" ]; then |
||||
echo "fw: can't mix ip4 and ip6" >&2 |
||||
return 1 |
||||
fi |
||||
local ver=${ip4:+4}${ip6:+6} |
||||
fam=i |
||||
fw $cmd ${ver:-i} $tab $chn $tgt $pos "$@" |
||||
fw__rc $? |
||||
} |
||||
|
||||
fw__has() { |
||||
local tab=${1:-$tab} |
||||
if [ $tab == '-' ]; then |
||||
type $app > /dev/null 2> /dev/null |
||||
fw__rc $(($? & 1)) |
||||
return |
||||
fi |
||||
local mod |
||||
eval "mod=\$FW_${fam}_${tab}" |
||||
if [ "$mod" ]; then |
||||
fw__rc $mod |
||||
return |
||||
fi |
||||
case "$fam" in |
||||
4) mod=iptable_${tab} ;; |
||||
6) mod=ip6table_${tab} ;; |
||||
*) mod=. ;; |
||||
esac |
||||
grep "^${mod} " /proc/modules > /dev/null |
||||
mod=$? |
||||
export FW_${fam}_${tab}=$mod |
||||
fw__rc $mod |
||||
} |
||||
|
||||
fw__err() { |
||||
local err |
||||
eval "err=\$FW_${fam}_ERROR" |
||||
fw__rc $err |
||||
} |
||||
|
||||
local app= |
||||
local pol= |
||||
case "$fam" in |
||||
4) app=iptables ;; |
||||
6) app=ip6tables ;; |
||||
i) fw__dualip "$@"; return ;; |
||||
I) fw__autoip "$@"; return ;; |
||||
e) app=ebtables ;; |
||||
a) app=arptables ;; |
||||
-) fw $cmd i $tab $chn $tgt $pos "$@"; return ;; |
||||
*) return 254 ;; |
||||
esac |
||||
case "$tab" in |
||||
f) tab=filter ;; |
||||
m) tab=mangle ;; |
||||
n) tab=nat ;; |
||||
r) tab=raw ;; |
||||
-) tab=filter ;; |
||||
esac |
||||
case "$cmd:$chn:$tgt:$pos" in |
||||
add:*:-:*) cmd=new-chain ;; |
||||
add:*:*:-) cmd=append ;; |
||||
add:*:*:$) cmd=append ;; |
||||
add:*:*:*) cmd=insert ;; |
||||
del:-:*:*) cmd=delete-chain; fw flush $fam $tab ;; |
||||
del:*:-:*) cmd=delete-chain; fw flush $fam $tab $chn ;; |
||||
del:*:*:*) cmd=delete ;; |
||||
flush:*) ;; |
||||
policy:*) pol=$tgt; tgt=- ;; |
||||
has:*) fw__has; return ;; |
||||
err:*) fw__err; return ;; |
||||
list:*) cmd="numeric --verbose --$cmd" ;; |
||||
*) return 254 ;; |
||||
esac |
||||
case "$chn" in |
||||
-) chn= ;; |
||||
esac |
||||
case "$tgt" in |
||||
-) tgt= ;; |
||||
esac |
||||
case "$pos" in |
||||
^) pos=1 ;; |
||||
$) pos= ;; |
||||
-) pos= ;; |
||||
esac |
||||
|
||||
if ! fw__has - family || ! fw__has $tab ; then |
||||
export FW_${fam}_ERROR=0 |
||||
return 0 |
||||
fi |
||||
|
||||
if [ $# -gt 0 ]; then |
||||
shift |
||||
if [ $cmd == del ]; then |
||||
pos=- |
||||
fi |
||||
fi |
||||
while [ $# -gt 1 ]; do |
||||
echo -n "$1" |
||||
echo -ne "\0" |
||||
shift |
||||
done | xargs -0 ${FW_TRACE:+-t} \ |
||||
$app --table ${tab} --${cmd} ${chn} ${pol} ${pos} ${tgt:+--jump "$tgt"} |
||||
fw__rc $? |
||||
} |
||||
|
||||
fw_get_port_range() { |
||||
local ports=$1 |
||||
local delim=${2:-:} |
||||
if [ "$3" ]; then |
||||
fw_get_port_range "${ports}-${3}" $delim |
||||
return |
||||
fi |
||||
|
||||
local first=${ports%-*} |
||||
local last=${ports#*-} |
||||
if [ "$first" != "$last" ]; then |
||||
echo "$first$delim$last" |
||||
else |
||||
echo "$first" |
||||
fi |
||||
} |
||||
|
||||
@ -0,0 +1,5 @@ |
||||
# This file is here for backwards compatibility and to override the |
||||
# uci_firewall.sh from an earlier version. |
||||
type fw_is_loaded >/dev/null || { |
||||
. /lib/firewall/core.sh |
||||
} |
||||
@ -1,530 +0,0 @@ |
||||
#!/bin/sh |
||||
# Copyright (C) 2008 John Crispin <blogic@openwrt.org> |
||||
|
||||
. /etc/functions.sh |
||||
|
||||
IPTABLES="echo iptables" |
||||
IPTABLES=iptables |
||||
|
||||
config_clear |
||||
include /lib/network |
||||
scan_interfaces |
||||
|
||||
CONFIG_APPEND=1 |
||||
config_load firewall |
||||
|
||||
config fw_zones |
||||
ZONE_LIST=$CONFIG_SECTION |
||||
|
||||
CUSTOM_CHAINS=1 |
||||
DEF_INPUT=DROP |
||||
DEF_OUTPUT=DROP |
||||
DEF_FORWARD=DROP |
||||
CONNTRACK_ZONES= |
||||
NOTRACK_DISABLED= |
||||
|
||||
find_item() { |
||||
local item="$1"; shift |
||||
for i in "$@"; do |
||||
[ "$i" = "$item" ] && return 0 |
||||
done |
||||
return 1 |
||||
} |
||||
|
||||
load_policy() { |
||||
config_get input $1 input |
||||
config_get output $1 output |
||||
config_get forward $1 forward |
||||
|
||||
DEF_INPUT="${input:-$DEF_INPUT}" |
||||
DEF_OUTPUT="${output:-$DEF_OUTPUT}" |
||||
DEF_FORWARD="${forward:-$DEF_FORWARD}" |
||||
} |
||||
|
||||
create_zone() { |
||||
local exists |
||||
|
||||
[ "$1" == "loopback" ] && return |
||||
|
||||
config_get exists $ZONE_LIST $1 |
||||
[ -n "$exists" ] && return |
||||
config_set $ZONE_LIST $1 1 |
||||
|
||||
$IPTABLES -N zone_$1 |
||||
$IPTABLES -N zone_$1_MSSFIX |
||||
$IPTABLES -N zone_$1_ACCEPT |
||||
$IPTABLES -N zone_$1_DROP |
||||
$IPTABLES -N zone_$1_REJECT |
||||
$IPTABLES -N zone_$1_forward |
||||
[ "$4" ] && $IPTABLES -A output -j zone_$1_$4 |
||||
$IPTABLES -N zone_$1_nat -t nat |
||||
$IPTABLES -N zone_$1_prerouting -t nat |
||||
$IPTABLES -t raw -N zone_$1_notrack |
||||
[ "$6" == "1" ] && $IPTABLES -t nat -A POSTROUTING -j zone_$1_nat |
||||
[ "$7" == "1" ] && $IPTABLES -I FORWARD 1 -j zone_$1_MSSFIX |
||||
} |
||||
|
||||
|
||||
addif() { |
||||
local network="$1" |
||||
local ifname="$2" |
||||
local zone="$3" |
||||
|
||||
local n_if n_zone |
||||
config_get n_if core "${network}_ifname" |
||||
config_get n_zone core "${network}_zone" |
||||
[ -n "$n_zone" ] && { |
||||
if [ "$n_zone" != "$zone" ]; then |
||||
delif "$network" "$n_if" "$n_zone" |
||||
else |
||||
return |
||||
fi |
||||
} |
||||
|
||||
logger "adding $network ($ifname) to firewall zone $zone" |
||||
$IPTABLES -A input -i "$ifname" -j zone_${zone} |
||||
$IPTABLES -I zone_${zone}_MSSFIX 1 -o "$ifname" -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu |
||||
$IPTABLES -I zone_${zone}_ACCEPT 1 -o "$ifname" -j ACCEPT |
||||
$IPTABLES -I zone_${zone}_DROP 1 -o "$ifname" -j DROP |
||||
$IPTABLES -I zone_${zone}_REJECT 1 -o "$ifname" -j reject |
||||
$IPTABLES -I zone_${zone}_ACCEPT 1 -i "$ifname" -j ACCEPT |
||||
$IPTABLES -I zone_${zone}_DROP 1 -i "$ifname" -j DROP |
||||
$IPTABLES -I zone_${zone}_REJECT 1 -i "$ifname" -j reject |
||||
$IPTABLES -I zone_${zone}_nat 1 -t nat -o "$ifname" -j MASQUERADE |
||||
$IPTABLES -I PREROUTING 1 -t nat -i "$ifname" -j zone_${zone}_prerouting |
||||
$IPTABLES -A forward -i "$ifname" -j zone_${zone}_forward |
||||
$IPTABLES -t raw -I PREROUTING 1 -i "$ifname" -j zone_${zone}_notrack |
||||
uci_set_state firewall core "${network}_ifname" "$ifname" |
||||
uci_set_state firewall core "${network}_zone" "$zone" |
||||
ACTION=add ZONE="$zone" INTERFACE="$network" DEVICE="$ifname" /sbin/hotplug-call firewall |
||||
} |
||||
|
||||
delif() { |
||||
local network="$1" |
||||
local ifname="$2" |
||||
local zone="$3" |
||||
|
||||
logger "removing $network ($ifname) from firewall zone $zone" |
||||
$IPTABLES -D input -i "$ifname" -j zone_$zone |
||||
$IPTABLES -D zone_${zone}_MSSFIX -o "$ifname" -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu |
||||
$IPTABLES -D zone_${zone}_ACCEPT -o "$ifname" -j ACCEPT |
||||
$IPTABLES -D zone_${zone}_DROP -o "$ifname" -j DROP |
||||
$IPTABLES -D zone_${zone}_REJECT -o "$ifname" -j reject |
||||
$IPTABLES -D zone_${zone}_ACCEPT -i "$ifname" -j ACCEPT |
||||
$IPTABLES -D zone_${zone}_DROP -i "$ifname" -j DROP |
||||
$IPTABLES -D zone_${zone}_REJECT -i "$ifname" -j reject |
||||
$IPTABLES -D zone_${zone}_nat -t nat -o "$ifname" -j MASQUERADE |
||||
$IPTABLES -D PREROUTING -t nat -i "$ifname" -j zone_${zone}_prerouting |
||||
$IPTABLES -D forward -i "$ifname" -j zone_${zone}_forward |
||||
uci_revert_state firewall core "${network}_ifname" |
||||
uci_revert_state firewall core "${network}_zone" |
||||
ACTION=remove ZONE="$zone" INTERFACE="$network" DEVICE="$ifname" /sbin/hotplug-call firewall |
||||
} |
||||
|
||||
load_synflood() { |
||||
local rate=${1:-25} |
||||
local burst=${2:-50} |
||||
echo "Loading synflood protection" |
||||
$IPTABLES -N syn_flood |
||||
$IPTABLES -A syn_flood -p tcp --syn -m limit --limit $rate/second --limit-burst $burst -j RETURN |
||||
$IPTABLES -A syn_flood -j DROP |
||||
$IPTABLES -A INPUT -p tcp --syn -j syn_flood |
||||
} |
||||
|
||||
fw_set_chain_policy() { |
||||
local chain=$1 |
||||
local target=$2 |
||||
[ "$target" == "REJECT" ] && { |
||||
$IPTABLES -A $chain -j reject |
||||
target=DROP |
||||
} |
||||
$IPTABLES -P $chain $target |
||||
} |
||||
|
||||
fw_clear() { |
||||
$IPTABLES -F |
||||
$IPTABLES -t nat -F |
||||
$IPTABLES -t nat -X |
||||
$IPTABLES -t raw -F |
||||
$IPTABLES -t raw -X |
||||
$IPTABLES -X |
||||
} |
||||
|
||||
fw_defaults() { |
||||
[ -n "$DEFAULTS_APPLIED" ] && { |
||||
echo "Error: multiple defaults sections detected" |
||||
return; |
||||
} |
||||
DEFAULTS_APPLIED=1 |
||||
|
||||
load_policy "$1" |
||||
|
||||
echo 1 > /proc/sys/net/ipv4/tcp_syncookies |
||||
for f in /proc/sys/net/ipv4/conf/*/accept_redirects |
||||
do |
||||
echo 0 > $f |
||||
done |
||||
for f in /proc/sys/net/ipv4/conf/*/accept_source_route |
||||
do |
||||
echo 0 > $f |
||||
done |
||||
|
||||
uci_revert_state firewall core |
||||
uci_set_state firewall core "" firewall_state |
||||
|
||||
$IPTABLES -P INPUT DROP |
||||
$IPTABLES -P OUTPUT DROP |
||||
$IPTABLES -P FORWARD DROP |
||||
|
||||
fw_clear |
||||
config_get_bool drop_invalid $1 drop_invalid 0 |
||||
|
||||
[ "$drop_invalid" -gt 0 ] && { |
||||
$IPTABLES -A INPUT -m state --state INVALID -j DROP |
||||
$IPTABLES -A OUTPUT -m state --state INVALID -j DROP |
||||
$IPTABLES -A FORWARD -m state --state INVALID -j DROP |
||||
NOTRACK_DISABLED=1 |
||||
} |
||||
|
||||
$IPTABLES -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT |
||||
$IPTABLES -A OUTPUT -m state --state RELATED,ESTABLISHED -j ACCEPT |
||||
$IPTABLES -A FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT |
||||
|
||||
$IPTABLES -A INPUT -i lo -j ACCEPT |
||||
$IPTABLES -A OUTPUT -o lo -j ACCEPT |
||||
|
||||
config_get syn_flood $1 syn_flood |
||||
config_get syn_rate $1 syn_rate |
||||
config_get syn_burst $1 syn_burst |
||||
[ "$syn_flood" == "1" ] && load_synflood $syn_rate $syn_burst |
||||
|
||||
echo "Adding custom chains" |
||||
fw_custom_chains |
||||
|
||||
$IPTABLES -N input |
||||
$IPTABLES -N output |
||||
$IPTABLES -N forward |
||||
|
||||
$IPTABLES -A INPUT -j input |
||||
$IPTABLES -A OUTPUT -j output |
||||
$IPTABLES -A FORWARD -j forward |
||||
|
||||
$IPTABLES -N reject |
||||
$IPTABLES -A reject -p tcp -j REJECT --reject-with tcp-reset |
||||
$IPTABLES -A reject -j REJECT --reject-with icmp-port-unreachable |
||||
|
||||
fw_set_chain_policy INPUT "$DEF_INPUT" |
||||
fw_set_chain_policy OUTPUT "$DEF_OUTPUT" |
||||
fw_set_chain_policy FORWARD "$DEF_FORWARD" |
||||
} |
||||
|
||||
fw_zone_defaults() { |
||||
local name |
||||
local network |
||||
local masq |
||||
|
||||
config_get name $1 name |
||||
config_get network $1 network |
||||
config_get_bool masq $1 masq "0" |
||||
config_get_bool conntrack $1 conntrack "0" |
||||
config_get_bool mtu_fix $1 mtu_fix 0 |
||||
|
||||
load_policy $1 |
||||
[ "$forward" ] && $IPTABLES -A zone_${name}_forward -j zone_${name}_${forward} |
||||
[ "$input" ] && $IPTABLES -A zone_${name} -j zone_${name}_${input} |
||||
} |
||||
|
||||
fw_zone() { |
||||
local name |
||||
local network |
||||
local masq |
||||
|
||||
config_get name $1 name |
||||
config_get network $1 network |
||||
config_get_bool masq $1 masq "0" |
||||
config_get_bool conntrack $1 conntrack "0" |
||||
config_get_bool mtu_fix $1 mtu_fix 0 |
||||
|
||||
load_policy $1 |
||||
[ "$conntrack" = "1" -o "$masq" = "1" ] && append CONNTRACK_ZONES "$name" |
||||
[ -z "$network" ] && network=$name |
||||
create_zone "$name" "$network" "$input" "$output" "$forward" "$masq" "$mtu_fix" |
||||
fw_custom_chains_zone "$name" |
||||
} |
||||
|
||||
fw_rule() { |
||||
local src |
||||
local src_ip |
||||
local src_mac |
||||
local src_port |
||||
local src_mac |
||||
local dest |
||||
local dest_ip |
||||
local dest_port |
||||
local proto |
||||
local icmp_type |
||||
local target |
||||
local ruleset |
||||
|
||||
config_get src $1 src |
||||
config_get src_ip $1 src_ip |
||||
config_get src_mac $1 src_mac |
||||
config_get src_port $1 src_port |
||||
config_get dest $1 dest |
||||
config_get dest_ip $1 dest_ip |
||||
config_get dest_port $1 dest_port |
||||
config_get proto $1 proto |
||||
config_get icmp_type $1 icmp_type |
||||
config_get target $1 target |
||||
config_get ruleset $1 ruleset |
||||
|
||||
src_port_first=${src_port%-*} |
||||
src_port_last=${src_port#*-} |
||||
[ "$src_port_first" -ne "$src_port_last" ] && { \ |
||||
src_port="$src_port_first:$src_port_last"; } |
||||
|
||||
dest_port_first=${dest_port%-*} |
||||
dest_port_last=${dest_port#*-} |
||||
[ "$dest_port_first" -ne "$dest_port_last" ] && { \ |
||||
dest_port="$dest_port_first:$dest_port_last"; } |
||||
|
||||
ZONE=input |
||||
TARGET=$target |
||||
[ -z "$target" ] && target=DROP |
||||
[ -n "$src" -a -z "$dest" ] && ZONE=zone_$src |
||||
[ -n "$src" -a -n "$dest" ] && ZONE=zone_${src}_forward |
||||
[ -n "$dest" ] && TARGET=zone_${dest}_$target |
||||
|
||||
eval 'RULE_COUNT=$((++RULE_COUNT_'$ZONE'))' |
||||
|
||||
add_rule() { |
||||
$IPTABLES -I $ZONE $RULE_COUNT \ |
||||
${proto:+-p $proto} \ |
||||
${icmp_type:+--icmp-type $icmp_type} \ |
||||
${src_ip:+-s $src_ip} \ |
||||
${src_port:+--sport $src_port} \ |
||||
${src_mac:+-m mac --mac-source $src_mac} \ |
||||
${dest_ip:+-d $dest_ip} \ |
||||
${dest_port:+--dport $dest_port} \ |
||||
-j $TARGET |
||||
} |
||||
[ "$proto" == "tcpudp" -o -z "$proto" ] && { |
||||
proto=tcp |
||||
add_rule |
||||
proto=udp |
||||
add_rule |
||||
return |
||||
} |
||||
add_rule |
||||
} |
||||
|
||||
fw_forwarding() { |
||||
local src |
||||
local dest |
||||
local masq |
||||
|
||||
config_get src $1 src |
||||
config_get dest $1 dest |
||||
[ -n "$src" ] && z_src=zone_${src}_forward || z_src=forward |
||||
[ -n "$dest" ] && z_dest=zone_${dest}_ACCEPT || z_dest=ACCEPT |
||||
$IPTABLES -I $z_src 1 -j $z_dest |
||||
|
||||
# propagate masq zone flag |
||||
find_item "$src" $CONNTRACK_ZONES && append CONNTRACK_ZONES $dest |
||||
find_item "$dest" $CONNTRACK_ZONES && append CONNTRACK_ZONES $src |
||||
} |
||||
|
||||
fw_redirect() { |
||||
local src |
||||
local src_ip |
||||
local src_port |
||||
local src_dport |
||||
local src_mac |
||||
local dest_ip |
||||
local dest_port dest_port2 |
||||
local proto |
||||
|
||||
config_get src $1 src |
||||
config_get src_ip $1 src_ip |
||||
config_get src_dip $1 src_dip |
||||
config_get src_port $1 src_port |
||||
config_get src_dport $1 src_dport |
||||
config_get src_mac $1 src_mac |
||||
config_get dest_ip $1 dest_ip |
||||
config_get dest_port $1 dest_port |
||||
config_get proto $1 proto |
||||
[ -z "$src" -o -z "$dest_ip" ] && { \ |
||||
echo "redirect needs src and dest_ip"; return ; } |
||||
|
||||
src_port_first=${src_port%-*} |
||||
src_port_last=${src_port#*-} |
||||
[ "$src_port_first" != "$src_port_last" ] && { \ |
||||
src_port="$src_port_first:$src_port_last"; } |
||||
|
||||
src_dport_first=${src_dport%-*} |
||||
src_dport_last=${src_dport#*-} |
||||
[ "$src_dport_first" != "$src_dport_last" ] && { \ |
||||
src_dport="$src_dport_first:$src_dport_last"; } |
||||
|
||||
dest_port2=${dest_port:-$src_dport} |
||||
dest_port_first=${dest_port2%-*} |
||||
dest_port_last=${dest_port2#*-} |
||||
[ "$dest_port_first" != "$dest_port_last" ] && { \ |
||||
dest_port2="$dest_port_first:$dest_port_last"; } |
||||
|
||||
add_rule() { |
||||
$IPTABLES -A zone_${src}_prerouting -t nat \ |
||||
${proto:+-p $proto} \ |
||||
${src_ip:+-s $src_ip} \ |
||||
${src_dip:+-d $src_dip} \ |
||||
${src_port:+--sport $src_port} \ |
||||
${src_dport:+--dport $src_dport} \ |
||||
${src_mac:+-m mac --mac-source $src_mac} \ |
||||
-j DNAT --to-destination $dest_ip${dest_port:+:$dest_port} |
||||
|
||||
$IPTABLES -I zone_${src}_forward 1 \ |
||||
${proto:+-p $proto} \ |
||||
-d $dest_ip \ |
||||
${src_ip:+-s $src_ip} \ |
||||
${src_port:+--sport $src_port} \ |
||||
${dest_port2:+--dport $dest_port2} \ |
||||
${src_mac:+-m mac --mac-source $src_mac} \ |
||||
-j ACCEPT |
||||
} |
||||
[ "$proto" == "tcpudp" -o -z "$proto" ] && { |
||||
proto=tcp |
||||
add_rule |
||||
proto=udp |
||||
add_rule |
||||
return |
||||
} |
||||
add_rule |
||||
} |
||||
|
||||
fw_include() { |
||||
local path |
||||
config_get path $1 path |
||||
[ -e $path ] && . $path |
||||
} |
||||
|
||||
get_interface_zones() { |
||||
local interface="$2" |
||||
local name |
||||
local network |
||||
config_get name $1 name |
||||
config_get network $1 network |
||||
[ -z "$network" ] && network=$name |
||||
for n in $network; do |
||||
[ "$n" = "$interface" ] && append add_zone "$name" |
||||
done |
||||
} |
||||
|
||||
fw_event() { |
||||
local action="$1" |
||||
local interface="$2" |
||||
local ifname="$(sh -c ". /etc/functions.sh; include /lib/network; scan_interfaces; config_get "$interface" ifname")" |
||||
add_zone= |
||||
local up |
||||
|
||||
[ -z "$ifname" ] && return 0 |
||||
config_foreach get_interface_zones zone "$interface" |
||||
[ -z "$add_zone" ] && return 0 |
||||
|
||||
case "$action" in |
||||
ifup) |
||||
for z in $add_zone; do |
||||
local loaded |
||||
config_get loaded core loaded |
||||
[ -n "$loaded" ] && addif "$interface" "$ifname" "$z" |
||||
done |
||||
;; |
||||
ifdown) |
||||
config_get up "$interface" up |
||||
|
||||
for z in $ZONE; do |
||||
[ "$up" == "1" ] && delif "$interface" "$ifname" "$z" |
||||
done |
||||
;; |
||||
esac |
||||
} |
||||
|
||||
fw_addif() { |
||||
local up |
||||
local ifname |
||||
config_get up $1 up |
||||
[ -n "$up" ] || return 0 |
||||
fw_event ifup "$1" |
||||
} |
||||
|
||||
fw_custom_chains() { |
||||
[ -n "$CUSTOM_CHAINS" ] || return 0 |
||||
$IPTABLES -N input_rule |
||||
$IPTABLES -N output_rule |
||||
$IPTABLES -N forwarding_rule |
||||
$IPTABLES -N prerouting_rule -t nat |
||||
$IPTABLES -N postrouting_rule -t nat |
||||
|
||||
$IPTABLES -A INPUT -j input_rule |
||||
$IPTABLES -A OUTPUT -j output_rule |
||||
$IPTABLES -A FORWARD -j forwarding_rule |
||||
$IPTABLES -A PREROUTING -t nat -j prerouting_rule |
||||
$IPTABLES -A POSTROUTING -t nat -j postrouting_rule |
||||
} |
||||
|
||||
fw_custom_chains_zone() { |
||||
local zone="$1" |
||||
|
||||
[ -n "$CUSTOM_CHAINS" ] || return 0 |
||||
$IPTABLES -N input_${zone} |
||||
$IPTABLES -N forwarding_${zone} |
||||
$IPTABLES -N prerouting_${zone} -t nat |
||||
$IPTABLES -I zone_${zone} 1 -j input_${zone} |
||||
$IPTABLES -I zone_${zone}_forward 1 -j forwarding_${zone} |
||||
$IPTABLES -I zone_${zone}_prerouting 1 -t nat -j prerouting_${zone} |
||||
} |
||||
|
||||
fw_check_notrack() { |
||||
local zone="$1" |
||||
config_get name "$zone" name |
||||
[ -n "$NOTRACK_DISABLED" ] || \ |
||||
find_item "$name" $CONNTRACK_ZONES || \ |
||||
$IPTABLES -t raw -A zone_${name}_notrack -j NOTRACK |
||||
} |
||||
|
||||
fw_init() { |
||||
DEFAULTS_APPLIED= |
||||
|
||||
echo "Loading defaults" |
||||
config_foreach fw_defaults defaults |
||||
echo "Loading zones" |
||||
config_foreach fw_zone zone |
||||
echo "Loading forwarding" |
||||
config_foreach fw_forwarding forwarding |
||||
echo "Loading redirects" |
||||
config_foreach fw_redirect redirect |
||||
echo "Loading rules" |
||||
config_foreach fw_rule rule |
||||
echo "Loading includes" |
||||
config_foreach fw_include include |
||||
echo "Loading zone defaults" |
||||
config_foreach fw_zone_defaults zone |
||||
uci_set_state firewall core loaded 1 |
||||
config_set core loaded 1 |
||||
config_foreach fw_check_notrack zone |
||||
INTERFACES="$(sh -c ' |
||||
. /etc/functions.sh; config_load network |
||||
echo_up() { local up; config_get_bool up "$1" up 0; [ $up = 1 ] && echo "$1"; } |
||||
config_foreach echo_up interface |
||||
')" |
||||
for interface in $INTERFACES; do |
||||
fw_event ifup "$interface" |
||||
done |
||||
} |
||||
|
||||
fw_stop() { |
||||
fw_clear |
||||
$IPTABLES -P INPUT ACCEPT |
||||
$IPTABLES -P OUTPUT ACCEPT |
||||
$IPTABLES -P FORWARD ACCEPT |
||||
uci_revert_state firewall |
||||
} |
||||
Loading…
Reference in new issue