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-rw-r--r--package/firewall/Makefile58
-rw-r--r--package/firewall/files/bin/fw49
-rw-r--r--package/firewall/files/firewall.config176
-rw-r--r--package/firewall/files/firewall.hotplug22
-rwxr-xr-xpackage/firewall/files/firewall.init27
-rw-r--r--package/firewall/files/firewall.upgrade1
-rw-r--r--package/firewall/files/firewall.user4
-rw-r--r--package/firewall/files/lib/config.sh101
-rw-r--r--package/firewall/files/lib/core.sh159
-rw-r--r--package/firewall/files/lib/core_forwarding.sh44
-rw-r--r--package/firewall/files/lib/core_init.sh338
-rw-r--r--package/firewall/files/lib/core_interface.sh205
-rw-r--r--package/firewall/files/lib/core_redirect.sh130
-rw-r--r--package/firewall/files/lib/core_rule.sh110
-rw-r--r--package/firewall/files/lib/fw.sh324
-rw-r--r--package/firewall/files/lib/uci_firewall.sh5
-rw-r--r--package/firewall/files/reflection.hotplug132
17 files changed, 1885 insertions, 0 deletions
diff --git a/package/firewall/Makefile b/package/firewall/Makefile
new file mode 100644
index 000000000..05f42a62e
--- /dev/null
+++ b/package/firewall/Makefile
@@ -0,0 +1,58 @@
+#
+# Copyright (C) 2008-2012 OpenWrt.org
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=firewall
+
+PKG_VERSION:=2
+PKG_RELEASE:=53
+
+include $(INCLUDE_DIR)/package.mk
+
+define Package/firewall
+ SECTION:=net
+ CATEGORY:=Base system
+ URL:=http://openwrt.org/
+ TITLE:=OpenWrt firewall
+ MAINTAINER:=Jo-Philipp Wich <xm@subsignal.org>
+ DEPENDS:=+iptables +kmod-ipt-conntrack +kmod-ipt-nat
+ PKGARCH:=all
+endef
+
+define Package/firewall/description
+ UCI based firewall for OpenWrt
+endef
+
+define Build/Compile
+ true
+endef
+
+define Package/firewall/conffiles
+/etc/config/firewall
+/etc/firewall.user
+endef
+
+define Package/firewall/install
+ $(INSTALL_DIR) $(1)/lib/firewall
+ $(INSTALL_DATA) ./files/lib/*.sh $(1)/lib/firewall
+ $(INSTALL_DIR) $(1)/sbin
+ $(INSTALL_BIN) ./files/bin/fw $(1)/sbin
+ $(INSTALL_DIR) $(1)/etc/config
+ $(INSTALL_DATA) ./files/firewall.config $(1)/etc/config/firewall
+ $(INSTALL_DIR) $(1)/etc/init.d/
+ $(INSTALL_BIN) ./files/firewall.init $(1)/etc/init.d/firewall
+ $(INSTALL_DIR) $(1)/etc/hotplug.d/iface
+ $(INSTALL_DATA) ./files/firewall.hotplug $(1)/etc/hotplug.d/iface/20-firewall
+ $(INSTALL_DIR) $(1)/etc/hotplug.d/firewall
+ $(INSTALL_DATA) ./files/reflection.hotplug $(1)/etc/hotplug.d/firewall/10-nat-reflection
+ $(INSTALL_DIR) $(1)/etc
+ $(INSTALL_DATA) ./files/firewall.user $(1)/etc
+ $(INSTALL_DIR) $(1)/lib/upgrade/keep.d
+ $(INSTALL_DATA) ./files/firewall.upgrade $(1)/lib/upgrade/keep.d/firewall
+endef
+
+$(eval $(call BuildPackage,firewall))
diff --git a/package/firewall/files/bin/fw b/package/firewall/files/bin/fw
new file mode 100644
index 000000000..5d20cc83e
--- /dev/null
+++ b/package/firewall/files/bin/fw
@@ -0,0 +1,49 @@
+#!/bin/sh
+FW_LIBDIR=/lib/firewall
+
+. /lib/functions.sh
+. ${FW_LIBDIR}/fw.sh
+
+case "$(type fw)" in
+ *function) ;;
+ *) exit 255;;
+esac
+
+usage() {
+ echo $0 "<command>" "<family>" "<table>" "<chain>" "<target>" "{" "<rules>" "}"
+ exit 0
+}
+
+cmd=$1
+shift
+case "$cmd" in
+ --help|help) usage ;;
+ start|stop|reload|restart)
+ . ${FW_LIBDIR}/core.sh
+ fw_$cmd
+ exit $?
+ ;;
+esac
+
+fam=$1
+shift
+case "$fam" in
+ ip)
+ fam=i
+ if [ $# -gt 2 ]; then
+ for p in $(seq 2 $(($# - 1))); do
+ if eval "[ \$$p == '}' ]"; then
+ fam=I
+ break
+ fi
+ done
+ fi ;;
+ ip4) fam=4 ;;
+ ip6) fam=6 ;;
+ arp) fam=a ;;
+ eth) fam=e ;;
+ -*) exec $0 $cmd ${fam##*-} "$@" ;;
+esac
+
+fw "$cmd" "$fam" "$@"
+exit $?
diff --git a/package/firewall/files/firewall.config b/package/firewall/files/firewall.config
new file mode 100644
index 000000000..a87413904
--- /dev/null
+++ b/package/firewall/files/firewall.config
@@ -0,0 +1,176 @@
+config defaults
+ option syn_flood 1
+ option input ACCEPT
+ option output ACCEPT
+ option forward REJECT
+# Uncomment this line to disable ipv6 rules
+# option disable_ipv6 1
+
+config zone
+ option name lan
+ option network 'lan'
+ option input ACCEPT
+ option output ACCEPT
+ option forward REJECT
+
+config zone
+ option name wan
+ option network 'wan'
+ option input REJECT
+ option output ACCEPT
+ option forward REJECT
+ option masq 1
+ option mtu_fix 1
+
+config forwarding
+ option src lan
+ option dest wan
+
+# We need to accept udp packets on port 68,
+# see https://dev.openwrt.org/ticket/4108
+config rule
+ option name Allow-DHCP-Renew
+ option src wan
+ option proto udp
+ option dest_port 68
+ option target ACCEPT
+ option family ipv4
+
+# Allow IPv4 ping
+config rule
+ option name Allow-Ping
+ option src wan
+ option proto icmp
+ option icmp_type echo-request
+ option family ipv4
+ option target ACCEPT
+
+# Allow DHCPv6 replies
+# see https://dev.openwrt.org/ticket/10381
+config rule
+ option name Allow-DHCPv6
+ option src wan
+ option proto udp
+ option src_ip fe80::/10
+ option src_port 547
+ option dest_ip fe80::/10
+ option dest_port 546
+ option family ipv6
+ option target ACCEPT
+
+# Allow essential incoming IPv6 ICMP traffic
+config rule
+ option name Allow-ICMPv6-Input
+ option src wan
+ option proto icmp
+ list icmp_type echo-request
+ list icmp_type echo-reply
+ list icmp_type destination-unreachable
+ list icmp_type packet-too-big
+ list icmp_type time-exceeded
+ list icmp_type bad-header
+ list icmp_type unknown-header-type
+ list icmp_type router-solicitation
+ list icmp_type neighbour-solicitation
+ list icmp_type router-advertisement
+ list icmp_type neighbour-advertisement
+ option limit 1000/sec
+ option family ipv6
+ option target ACCEPT
+
+# Allow essential forwarded IPv6 ICMP traffic
+config rule
+ option name Allow-ICMPv6-Forward
+ option src wan
+ option dest *
+ option proto icmp
+ list icmp_type echo-request
+ list icmp_type echo-reply
+ list icmp_type destination-unreachable
+ list icmp_type packet-too-big
+ list icmp_type time-exceeded
+ list icmp_type bad-header
+ list icmp_type unknown-header-type
+ option limit 1000/sec
+ option family ipv6
+ option target ACCEPT
+
+# include a file with users custom iptables rules
+config include
+ option path /etc/firewall.user
+
+
+### EXAMPLE CONFIG SECTIONS
+# do not allow a specific ip to access wan
+#config rule
+# option src lan
+# option src_ip 192.168.45.2
+# option dest wan
+# option proto tcp
+# option target REJECT
+
+# block a specific mac on wan
+#config rule
+# option dest wan
+# option src_mac 00:11:22:33:44:66
+# option target REJECT
+
+# block incoming ICMP traffic on a zone
+#config rule
+# option src lan
+# option proto ICMP
+# option target DROP
+
+# port redirect port coming in on wan to lan
+#config redirect
+# option src wan
+# option src_dport 80
+# option dest lan
+# option dest_ip 192.168.16.235
+# option dest_port 80
+# option proto tcp
+
+# port redirect of remapped ssh port (22001) on wan
+#config redirect
+# option src wan
+# option src_dport 22001
+# option dest lan
+# option dest_port 22
+# option proto tcp
+
+# allow IPsec/ESP and ISAKMP passthrough
+#config rule
+# option src wan
+# option dest lan
+# option protocol esp
+# option target ACCEPT
+
+#config rule
+# option src wan
+# option dest lan
+# option src_port 500
+# option dest_port 500
+# option proto udp
+# option target ACCEPT
+
+### FULL CONFIG SECTIONS
+#config rule
+# option src lan
+# option src_ip 192.168.45.2
+# option src_mac 00:11:22:33:44:55
+# option src_port 80
+# option dest wan
+# option dest_ip 194.25.2.129
+# option dest_port 120
+# option proto tcp
+# option target REJECT
+
+#config redirect
+# option src lan
+# option src_ip 192.168.45.2
+# option src_mac 00:11:22:33:44:55
+# option src_port 1024
+# option src_dport 80
+# option dest_ip 194.25.2.129
+# option dest_port 120
+# option proto tcp
diff --git a/package/firewall/files/firewall.hotplug b/package/firewall/files/firewall.hotplug
new file mode 100644
index 000000000..52e779848
--- /dev/null
+++ b/package/firewall/files/firewall.hotplug
@@ -0,0 +1,22 @@
+#!/bin/sh
+# This script is executed as part of the hotplug event with
+# HOTPLUG_TYPE=iface, triggered by various scripts when an interface
+# is configured (ACTION=ifup) or deconfigured (ACTION=ifdown). The
+# interface is available as INTERFACE, the real device as DEVICE.
+
+[ "$DEVICE" == "lo" ] && exit 0
+
+. /lib/functions.sh
+. /lib/firewall/core.sh
+
+fw_init
+fw_is_loaded || exit 0
+
+case "$ACTION" in
+ ifup)
+ fw_configure_interface "$INTERFACE" add "$DEVICE" &
+ ;;
+ ifdown)
+ fw_configure_interface "$INTERFACE" del "$DEVICE"
+ ;;
+esac
diff --git a/package/firewall/files/firewall.init b/package/firewall/files/firewall.init
new file mode 100755
index 000000000..a2fd0a0e9
--- /dev/null
+++ b/package/firewall/files/firewall.init
@@ -0,0 +1,27 @@
+#!/bin/sh /etc/rc.common
+# Copyright (C) 2008-2010 OpenWrt.org
+
+START=45
+
+FW_LIBDIR=/lib/firewall
+
+fw() {
+ . $FW_LIBDIR/core.sh
+ fw_$1
+}
+
+start() {
+ fw start
+}
+
+stop() {
+ fw stop
+}
+
+restart() {
+ fw restart
+}
+
+reload() {
+ fw reload
+}
diff --git a/package/firewall/files/firewall.upgrade b/package/firewall/files/firewall.upgrade
new file mode 100644
index 000000000..64f63eb39
--- /dev/null
+++ b/package/firewall/files/firewall.upgrade
@@ -0,0 +1 @@
+/etc/firewall.user
diff --git a/package/firewall/files/firewall.user b/package/firewall/files/firewall.user
new file mode 100644
index 000000000..1ccbd0165
--- /dev/null
+++ b/package/firewall/files/firewall.user
@@ -0,0 +1,4 @@
+# This file is interpreted as shell script.
+# Put your custom iptables rules here, they will
+# be executed with each firewall (re-)start.
+
diff --git a/package/firewall/files/lib/config.sh b/package/firewall/files/lib/config.sh
new file mode 100644
index 000000000..8b2399fc8
--- /dev/null
+++ b/package/firewall/files/lib/config.sh
@@ -0,0 +1,101 @@
+# Copyright (C) 2009-2010 OpenWrt.org
+# Copyright (C) 2009 Malte S. Stretz <http://msquadrat.de>
+#
+# This is a temporary file, I hope to have some of this stuff merged into
+# /lib/functions.sh (without the fw_ prefix of course) one day.
+
+fw_config_append() { # <package>
+ CONFIG_APPEND=1 config_load "$@"
+ unset CONFIG_APPEND
+}
+
+fw_config_once() { # <function> <type>
+ local func=$1
+ local type=$2
+ shift 2
+
+ local config=cfg00nil
+ fw_config__once() {
+ config=$1
+ }
+ config_foreach fw_config__once "$type"
+
+ $func $config "$@"
+}
+
+fw_config_get_section() { # <config> <prefix> <type> <name> <default> ...
+ local config=$1
+ local prefix=$2
+ shift 2
+
+ [ -n "$config" ] || return 1
+ [ -n "$prefix" ] && {
+ prefix="${prefix}_"
+ export ${NO_EXPORT:+-n} -- "${prefix}NAME"="${config}"
+ config_get "${prefix}TYPE" "$config" TYPE
+ }
+
+ local enabled
+ config_get_bool enabled "$config" enabled 1
+ [ $enabled -eq 1 ] || return 1
+
+ [ "$1" == '{' ] && shift
+ while [ $# -ge 3 ]; do
+ local type=$1
+ local name=$2
+ local dflt=$3
+ shift 3
+ # TODO: Move handling of defaults to /lib/functions.sh
+ # and get replace the case block with the following
+ # two lines:
+ # type=${type#string}
+ # config_get${type:+_${type}} "${prefix}${name}" "$config" "$name" "$dflt" || return
+ case "$type" in
+ string)
+ local tmp
+ config_get tmp "$config" "$name" || return
+ [ -z "$tmp" ] && tmp=$dflt
+ export ${NO_EXPORT:+-n} -- "${prefix}${name}=${tmp}"
+ continue
+ ;;
+ boolean)
+ type=bool
+ ;;
+ esac;
+
+ local cmd=${prefix}config_get_${type}
+ type $cmd > /dev/null || {
+ cmd=config_get_${type}
+ }
+ type $cmd > /dev/null || {
+ echo "config type $type (for $name) not supported" >&2
+ return 1
+ }
+ $cmd "${prefix}${name}" "$config" "$name" "$dflt" || return
+ done
+}
+
+config_get_ipaddr() {
+ local varn=$1
+ local conf=$2
+ local name=$3
+ local dflt=$4
+
+ local addr
+ config_get addr "$conf" "$name" || return
+ [ -n "$addr" ] || addr=$dflt
+
+ local mask=${addr#*/}
+ [ "$mask" != "$addr" ] || mask=
+ addr=${addr%/*}
+
+ local vers=
+ case "$addr" in
+ *:*) vers=6; mask="${mask:-128}" ;;
+ *.*) vers=4; mask="${mask:-32}" ;;
+ esac
+
+ export ${NO_EXPORT:+-n} -- "${varn}=${addr}"
+ export ${NO_EXPORT:+-n} -- "${varn}_prefixlen=${mask}"
+ export ${NO_EXPORT:+-n} -- "${varn}_version=${vers}"
+}
diff --git a/package/firewall/files/lib/core.sh b/package/firewall/files/lib/core.sh
new file mode 100644
index 000000000..93d4d2e29
--- /dev/null
+++ b/package/firewall/files/lib/core.sh
@@ -0,0 +1,159 @@
+# Copyright (C) 2009-2010 OpenWrt.org
+
+FW_LIBDIR=${FW_LIBDIR:-/lib/firewall}
+
+. $FW_LIBDIR/fw.sh
+include /lib/network
+
+fw_start() {
+ fw_init
+
+ FW_DEFAULTS_APPLIED=
+
+ fw_is_loaded && {
+ echo "firewall already loaded" >&2
+ exit 1
+ }
+
+ uci_set_state firewall core "" firewall_state
+
+ fw_clear DROP
+
+ fw_callback pre core
+
+ echo "Loading defaults"
+ fw_config_once fw_load_defaults defaults
+
+ echo "Loading zones"
+ config_foreach fw_load_zone zone
+
+ echo "Loading forwardings"
+ config_foreach fw_load_forwarding forwarding
+
+ echo "Loading rules"
+ config_foreach fw_load_rule rule
+
+ echo "Loading redirects"
+ config_foreach fw_load_redirect redirect
+
+ echo "Loading includes"
+ config_foreach fw_load_include include
+
+ [ -z "$FW_NOTRACK_DISABLED" ] && {
+ echo "Optimizing conntrack"
+ config_foreach fw_load_notrack_zone zone
+ }
+
+ echo "Loading interfaces"
+ config_foreach fw_configure_interface interface add
+
+ fw_callback post core
+
+ uci_set_state firewall core zones "$FW_ZONES"
+ uci_set_state firewall core loaded 1
+}
+
+fw_stop() {
+ fw_init
+
+ fw_callback pre stop
+
+ local z n i
+ config_get z core zones
+ for z in $z; do
+ config_get n core "${z}_networks"
+ for n in $n; do
+ config_get i core "${n}_ifname"
+ [ -n "$i" ] && env -i ACTION=remove ZONE="$z" \
+ INTERFACE="$n" DEVICE="$i" /sbin/hotplug-call firewall
+ done
+
+ config_get i core "${z}_tcpmss"
+ [ "$i" == 1 ] && {
+ fw del i m FORWARD zone_${z}_MSSFIX
+ fw del i m zone_${z}_MSSFIX
+ }
+ done
+
+ fw_clear ACCEPT
+
+ fw_callback post stop
+
+ uci_revert_state firewall
+ config_clear
+
+ local h
+ for h in $FW_HOOKS; do unset $h; done
+
+ unset FW_HOOKS
+ unset FW_INITIALIZED
+}
+
+fw_restart() {
+ fw_stop
+ fw_start
+}
+
+fw_reload() {
+ fw_restart
+}
+
+fw_is_loaded() {
+ local bool=$(uci_get_state firewall.core.loaded)
+ return $((! ${bool:-0}))
+}
+
+
+fw_die() {
+ echo "Error:" "$@" >&2
+ fw_log error "$@"
+ fw_stop
+ exit 1
+}
+
+fw_log() {
+ local level="$1"
+ [ -n "$2" ] && shift || level=notice
+ [ "$level" != error ] || echo "Error: $@" >&2
+ logger -t firewall -p user.$level "$@"
+}
+
+
+fw_init() {
+ [ -z "$FW_INITIALIZED" ] || return 0
+
+ . $FW_LIBDIR/config.sh
+
+ scan_interfaces
+ fw_config_append firewall
+
+ local hooks="core stop defaults zone notrack synflood"
+ local file lib hk pp
+ for file in $FW_LIBDIR/core_*.sh; do
+ . $file
+ hk=$(basename $file .sh)
+ hk=${hk#core_}
+ append hooks $hk
+ done
+ for file in $FW_LIBDIR/*.sh; do
+ lib=$(basename $file .sh)
+ lib=${lib##[0-9][0-9]_}
+ case $lib in
+ core*|fw|config|uci_firewall) continue ;;
+ esac
+ . $file
+ for hk in $hooks; do
+ for pp in pre post; do
+ type ${lib}_${pp}_${hk}_cb >/dev/null && {
+ append FW_CB_${pp}_${hk} ${lib}
+ append FW_HOOKS FW_CB_${pp}_${hk}
+ }
+ done
+ done
+ done
+
+ fw_callback post init
+
+ FW_INITIALIZED=1
+ return 0
+}
diff --git a/package/firewall/files/lib/core_forwarding.sh b/package/firewall/files/lib/core_forwarding.sh
new file mode 100644
index 000000000..c4a968143
--- /dev/null
+++ b/package/firewall/files/lib/core_forwarding.sh
@@ -0,0 +1,44 @@
+# Copyright (C) 2009-2010 OpenWrt.org
+
+fw_config_get_forwarding() {
+ [ "${forwarding_NAME}" != "$1" ] || return
+ fw_config_get_section "$1" forwarding { \
+ string _name "$1" \
+ string name "" \
+ string src "" \
+ string dest "" \
+ string family "" \
+ } || return
+ [ -n "$forwarding_name" ] || forwarding_name=$forwarding__name
+}
+
+fw_load_forwarding() {
+ fw_config_get_forwarding "$1"
+
+ fw_callback pre forwarding
+
+ local chain=forward
+ [ -n "$forwarding_src" ] && {
+ chain=zone_${forwarding_src}_forward
+ }
+
+ local target=ACCEPT
+ [ -n "$forwarding_dest" ] && {
+ target=zone_${forwarding_dest}_ACCEPT
+ }
+
+ local mode
+ fw_get_family_mode mode ${forwarding_family:-x} ${forwarding_dest:-${forwarding_src:--}} i
+
+ fw add $mode f $chain $target ^
+
+ # propagate masq zone flag
+ [ -n "$forwarding_src" ] && list_contains FW_CONNTRACK_ZONES $forwarding_src && {
+ append FW_CONNTRACK_ZONES $forwarding_dest
+ }
+ [ -n "$forwarding_dest" ] && list_contains FW_CONNTRACK_ZONES $forwarding_dest && {
+ append FW_CONNTRACK_ZONES $forwarding_src
+ }
+
+ fw_callback post forwarding
+}
diff --git a/package/firewall/files/lib/core_init.sh b/package/firewall/files/lib/core_init.sh
new file mode 100644
index 000000000..035647998
--- /dev/null
+++ b/package/firewall/files/lib/core_init.sh
@@ -0,0 +1,338 @@
+# Copyright (C) 2009-2011 OpenWrt.org
+# Copyright (C) 2008 John Crispin <blogic@openwrt.org>
+
+FW_INITIALIZED=
+
+FW_ZONES=
+FW_ZONES4=
+FW_ZONES6=
+FW_CONNTRACK_ZONES=
+FW_NOTRACK_DISABLED=
+
+FW_DEFAULTS_APPLIED=
+FW_ADD_CUSTOM_CHAINS=
+FW_ACCEPT_REDIRECTS=
+FW_ACCEPT_SRC_ROUTE=
+
+FW_DEFAULT_INPUT_POLICY=REJECT
+FW_DEFAULT_OUTPUT_POLICY=REJECT
+FW_DEFAULT_FORWARD_POLICY=REJECT
+
+FW_DISABLE_IPV4=0
+FW_DISABLE_IPV6=0
+
+
+fw_load_defaults() {
+ fw_config_get_section "$1" defaults { \
+ string input $FW_DEFAULT_INPUT_POLICY \
+ string output $FW_DEFAULT_OUTPUT_POLICY \
+ string forward $FW_DEFAULT_FORWARD_POLICY \
+ boolean drop_invalid 0 \
+ boolean syn_flood 0 \
+ boolean synflood_protect 0 \
+ string synflood_rate 25 \
+ string synflood_burst 50 \
+ boolean tcp_syncookies 1 \
+ boolean tcp_ecn 0 \
+ boolean tcp_westwood 0 \
+ boolean tcp_window_scaling 1 \
+ boolean accept_redirects 0 \
+ boolean accept_source_route 0 \
+ boolean custom_chains 1 \
+ boolean disable_ipv6 0 \
+ } || return
+ [ -n "$FW_DEFAULTS_APPLIED" ] && {
+ fw_log error "duplicate defaults section detected, skipping"
+ return 1
+ }
+ FW_DEFAULTS_APPLIED=1
+
+ FW_DEFAULT_INPUT_POLICY=$defaults_input
+ FW_DEFAULT_OUTPUT_POLICY=$defaults_output
+ FW_DEFAULT_FORWARD_POLICY=$defaults_forward
+
+ FW_ADD_CUSTOM_CHAINS=$defaults_custom_chains
+
+ FW_ACCEPT_REDIRECTS=$defaults_accept_redirects
+ FW_ACCEPT_SRC_ROUTE=$defaults_accept_source_route
+
+ FW_DISABLE_IPV6=$defaults_disable_ipv6
+
+ fw_callback pre defaults
+
+ # Seems like there are only one sysctl for both IP versions.
+ for s in syncookies ecn westwood window_scaling; do
+ eval "sysctl -e -w net.ipv4.tcp_${s}=\$defaults_tcp_${s}" >/dev/null
+ done
+ fw_sysctl_interface all
+
+ fw add i f INPUT ACCEPT { -m conntrack --ctstate RELATED,ESTABLISHED }
+ fw add i f OUTPUT ACCEPT { -m conntrack --ctstate RELATED,ESTABLISHED }
+ fw add i f FORWARD ACCEPT { -m conntrack --ctstate RELATED,ESTABLISHED }
+
+ [ $defaults_drop_invalid == 1 ] && {
+ fw add i f INPUT DROP { -m conntrack --ctstate INVALID }
+ fw add i f OUTPUT DROP { -m conntrack --ctstate INVALID }
+ fw add i f FORWARD DROP { -m conntrack --ctstate INVALID }
+ FW_NOTRACK_DISABLED=1
+ }
+
+ fw add i f INPUT ACCEPT { -i lo }
+ fw add i f OUTPUT ACCEPT { -o lo }
+
+ # Compatibility to old 'syn_flood' parameter
+ [ $defaults_syn_flood == 1 ] && \
+ defaults_synflood_protect=1
+
+ [ "${defaults_synflood_rate%/*}" == "$defaults_synflood_rate" ] && \
+ defaults_synflood_rate="$defaults_synflood_rate/second"
+
+ [ $defaults_synflood_protect == 1 ] && {
+ echo "Loading synflood protection"
+ fw_callback pre synflood
+ fw add i f syn_flood
+ fw add i f syn_flood RETURN { \
+ -p tcp --syn \
+ -m limit --limit "${defaults_synflood_rate}" --limit-burst "${defaults_synflood_burst}" \
+ }
+ fw add i f syn_flood DROP
+ fw add i f INPUT syn_flood { -p tcp --syn }
+ fw_callback post synflood
+ }
+
+ [ $defaults_custom_chains == 1 ] && {
+ echo "Adding custom chains"
+ fw add i f input_rule
+ fw add i f output_rule
+ fw add i f forwarding_rule
+ fw add i n prerouting_rule
+ fw add i n postrouting_rule
+
+ fw add i f INPUT input_rule
+ fw add i f OUTPUT output_rule
+ fw add i f FORWARD forwarding_rule
+ fw add i n PREROUTING prerouting_rule
+ fw add i n POSTROUTING postrouting_rule
+ }
+
+ fw add i f input
+ fw add i f output
+ fw add i f forward
+
+ fw add i f INPUT input
+ fw add i f OUTPUT output
+ fw add i f FORWARD forward
+
+ fw add i f reject
+ fw add i f reject REJECT { --reject-with tcp-reset -p tcp }
+ fw add i f reject REJECT { --reject-with port-unreach }
+
+ fw_set_filter_policy
+
+ fw_callback post defaults
+}
+
+
+fw_config_get_zone() {
+ [ "${zone_NAME}" != "$1" ] || return
+ fw_config_get_section "$1" zone { \
+ string name "$1" \
+ string network "" \
+ string input "$FW_DEFAULT_INPUT_POLICY" \
+ string output "$FW_DEFAULT_OUTPUT_POLICY" \
+ string forward "$FW_DEFAULT_FORWARD_POLICY" \
+ boolean masq 0 \
+ string masq_src "" \
+ string masq_dest "" \
+ boolean conntrack 0 \
+ boolean mtu_fix 0 \
+ boolean custom_chains "$FW_ADD_CUSTOM_CHAINS" \
+ boolean log 0 \
+ string log_limit 10 \
+ string family "" \
+ } || return
+ [ -n "$zone_name" ] || zone_name=$zone_NAME
+ [ -n "$zone_network" ] || zone_network=$zone_name
+}
+
+fw_load_zone() {
+ fw_config_get_zone "$1"
+
+ list_contains FW_ZONES $zone_name && {
+ fw_log error "zone ${zone_name}: duplicated zone, skipping"
+ return 0
+ }
+ append FW_ZONES $zone_name
+
+ fw_callback pre zone
+
+ [ $zone_conntrack = 1 -o $zone_masq = 1 ] && \
+ append FW_CONNTRACK_ZONES "$zone_name"
+
+ local mode
+ case "$zone_family" in
+ *4)
+ mode=4
+ append FW_ZONES4 $zone_name
+ uci_set_state firewall core ${zone_name}_ipv4 1
+ ;;
+ *6)
+ mode=6
+ append FW_ZONES6 $zone_name
+ uci_set_state firewall core ${zone_name}_ipv6 1
+ ;;
+ *)
+ mode=i
+ append FW_ZONES4 $zone_name
+ append FW_ZONES6 $zone_name
+ uci_set_state firewall core ${zone_name}_ipv4 1
+ uci_set_state firewall core ${zone_name}_ipv6 1
+ ;;
+ esac
+
+ local chain=zone_${zone_name}
+
+ fw add $mode f ${chain}_ACCEPT
+ fw add $mode f ${chain}_DROP
+ fw add $mode f ${chain}_REJECT
+
+ # TODO: Rename to ${chain}_input
+ fw add $mode f ${chain}
+ fw add $mode f ${chain} ${chain}_${zone_input} $
+
+ fw add $mode f ${chain}_forward
+ fw add $mode f ${chain}_forward ${chain}_${zone_forward} $
+
+ # TODO: add ${chain}_output
+ fw add $mode f output ${chain}_${zone_output} $
+
+ # TODO: Rename to ${chain}_MASQUERADE
+ fw add $mode n ${chain}_nat
+ fw add $mode n ${chain}_prerouting
+
+ fw add $mode r ${chain}_notrack
+
+ [ $zone_mtu_fix == 1 ] && {
+ fw add $mode m ${chain}_MSSFIX
+ fw add $mode m FORWARD ${chain}_MSSFIX ^
+ uci_set_state firewall core ${zone_name}_tcpmss 1
+ }
+
+ [ $zone_custom_chains == 1 ] && {
+ [ $FW_ADD_CUSTOM_CHAINS == 1 ] || \
+ fw_die "zone ${zone_name}: custom_chains globally disabled"
+
+ fw add $mode f input_${zone_name}
+ fw add $mode f ${chain} input_${zone_name} ^
+
+ fw add $mode f forwarding_${zone_name}
+ fw add $mode f ${chain}_forward forwarding_${zone_name} ^
+
+ fw add $mode n prerouting_${zone_name}
+ fw add $mode n ${chain}_prerouting prerouting_${zone_name} ^
+ }
+
+ [ "$zone_log" == 1 ] && {
+ [ "${zone_log_limit%/*}" == "$zone_log_limit" ] && \
+ zone_log_limit="$zone_log_limit/minute"
+
+ local t
+ for t in REJECT DROP; do
+ fw add $mode f ${chain}_${t} LOG ^ \
+ { -m limit --limit $zone_log_limit --log-prefix "$t($zone_name): " }
+ done
+
+ [ $zone_mtu_fix == 1 ] && \
+ fw add $mode m ${chain}_MSSFIX LOG ^ \
+ { -m limit --limit $zone_log_limit --log-prefix "MSSFIX($zone_name): " }
+ }
+
+ # NB: if MASQUERADING for IPv6 becomes available we'll need a family check here
+ if [ "$zone_masq" == 1 ]; then
+ local msrc mdst
+ for msrc in ${zone_masq_src:-0.0.0.0/0}; do
+ case "$msrc" in
+ *.*) fw_get_negation msrc '-s' "$msrc" ;;
+ *) fw_get_subnet4 msrc '-s' "$msrc" || break ;;
+ esac
+
+ for mdst in ${zone_masq_dest:-0.0.0.0/0}; do
+ case "$mdst" in
+ *.*) fw_get_negation mdst '-d' "$mdst" ;;
+ *) fw_get_subnet4 mdst '-d' "$mdst" || break ;;
+ esac
+
+ fw add $mode n ${chain}_nat MASQUERADE $ { $msrc $mdst }
+ done
+ done
+ fi
+
+ fw_callback post zone
+}
+
+fw_load_notrack_zone() {
+ fw_config_get_zone "$1"
+ list_contains FW_CONNTRACK_ZONES "${zone_name}" && return
+
+ fw_callback pre notrack
+
+ fw add i r zone_${zone_name}_notrack NOTRACK $
+
+ fw_callback post notrack
+}
+
+
+fw_load_include() {
+ local name="$1"
+
+ local path
+ config_get path ${name} path
+
+ [ -e $path ] && (
+ config() {
+ fw_log error "You cannot use UCI in firewall includes!" >&2
+ exit 1
+ }
+ . $path
+ )
+}
+
+
+fw_clear() {
+ local policy=$1
+
+ fw_set_filter_policy $policy
+
+ local tab
+ for tab in f n r; do
+ fw del i $tab
+ done
+}
+
+fw_set_filter_policy() {
+ local policy=$1
+
+ local chn tgt
+ for chn in INPUT OUTPUT FORWARD; do
+ eval "tgt=\${policy:-\${FW_DEFAULT_${chn}_POLICY}}"
+ [ $tgt == "REJECT" ] && tgt=reject
+ [ $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
+}
diff --git a/package/firewall/files/lib/core_interface.sh b/package/firewall/files/lib/core_interface.sh
new file mode 100644
index 000000000..3d6718431
--- /dev/null
+++ b/package/firewall/files/lib/core_interface.sh
@@ -0,0 +1,205 @@
+# Copyright (C) 2009-2012 OpenWrt.org
+
+fw__uci_state_add() {
+ local var="$1"
+ local item="$2"
+
+ local val="$(uci_get_state firewall core $var)"
+ local e1; for e1 in $item; do
+ local e2; for e2 in $val; do
+ [ "$e1" = "$e2" ] && e1=""
+ done
+ val="${val:+$val${e1:+ }}$e1"
+ done
+
+ uci_toggle_state firewall core $var "$val"
+}
+
+fw__uci_state_del() {
+ local var="$1"
+ local item="$2"
+
+ local rest=""
+ local val="$(uci_get_state firewall core $var)"
+ local e1; for e1 in $val; do
+ local e2; for e2 in $item; do
+ [ "$e1" = "$e2" ] && e1=""
+ done
+ rest="${rest:+$rest${e1:+ }}$e1"
+ done
+
+ uci_toggle_state firewall core $var "$rest"
+}
+
+fw_configure_interface() {
+ local iface=$1
+ local action=$2
+ local ifname=$3
+ local aliasnet=$4
+
+ [ "$action" == "add" ] && {
+ local status=$(uci_get_state network "$iface" up 0)
+ [ "$status" == 1 ] || [ -n "$aliasnet" ] || return 0
+ }
+
+ [ -n "$ifname" ] || {
+ ifname=$(uci_get_state network "$iface" ifname)
+ ifname="${ifname%%:*}"
+ [ -z "$ifname" ] && return 0
+ }
+
+ [ "$ifname" == "lo" ] && return 0
+
+ fw_callback pre interface
+
+ fw__do_rules() {
+ local action=$1
+ local zone=$2
+ local chain=zone_${zone}
+ local ifname=$3
+ local subnet=$4
+
+ local inet onet mode
+ fw_get_family_mode mode x $zone i
+
+ case "$mode/$subnet" in
+ # Zone supports v6 only or dual, need v6
+ G6/*:*|i/*:*)
+ inet="-s $subnet -d ::/0"
+ onet="-s ::/0 -d $subnet"
+ mode=6
+ ;;
+
+ # Zone supports v4 only or dual, need v4
+ G4/*.*.*.*|i/*.*.*.*)
+ inet="-s $subnet -d 0.0.0.0/0"
+ onet="-s 0.0.0.0/0 -d $subnet"
+ mode=4
+ ;;
+
+ # Need v6 while zone is v4
+ */*:*) fw_log info "zone $zone does not support IPv6 address family, skipping"; return ;;
+
+ # Need v4 while zone is v6
+ */*.*) fw_log info "zone $zone does not support IPv4 address family, skipping"; return ;;
+
+ # Strip prefix
+ *) mode="${mode#G}" ;;
+ esac
+
+ lock /var/run/firewall-interface.lock
+
+ fw $action $mode f ${chain}_ACCEPT ACCEPT $ { -o "$ifname" $onet }
+ fw $action $mode f ${chain}_ACCEPT ACCEPT $ { -i "$ifname" $inet }
+ fw $action $mode f ${chain}_DROP DROP $ { -o "$ifname" $onet }
+ fw $action $mode f ${chain}_DROP DROP $ { -i "$ifname" $inet }
+ fw $action $mode f ${chain}_REJECT reject $ { -o "$ifname" $onet }
+ fw $action $mode f ${chain}_REJECT reject $ { -i "$ifname" $inet }
+
+ [ "$(uci_get_state firewall core "${zone}_tcpmss")" == 1 ] && \
+ fw $action $mode m ${chain}_MSSFIX TCPMSS $ \
+ { -o "$ifname" -p tcp --tcp-flags SYN,RST SYN --clamp-mss-to-pmtu $onet }
+
+ fw $action $mode f input ${chain} $ { -i "$ifname" $inet }
+ fw $action $mode f forward ${chain}_forward $ { -i "$ifname" $inet }
+ fw $action $mode n PREROUTING ${chain}_prerouting $ { -i "$ifname" $inet }
+ fw $action $mode r PREROUTING ${chain}_notrack $ { -i "$ifname" $inet }
+ fw $action $mode n POSTROUTING ${chain}_nat $ { -o "$ifname" $onet }
+
+ lock -u /var/run/firewall-interface.lock
+ }
+
+ local old_zones old_ifname old_subnets
+ config_get old_zones core "${iface}_zone"
+ [ -n "$old_zones" ] && {
+ config_get old_ifname core "${iface}_ifname"
+ config_get old_subnets core "${iface}_subnets"
+
+ local z
+ for z in $old_zones; do
+ local n
+ for n in ${old_subnets:-""}; do
+ fw_log info "removing $iface ($old_ifname${n:+ alias $n}) from zone $z"
+ fw__do_rules del $z $old_ifname $n
+ done
+
+ [ -n "$old_subnets" ] || {
+ fw__uci_state_del "${z}_networks" "$iface"
+ env -i ACTION=remove ZONE="$z" INTERFACE="$iface" DEVICE="$ifname" /sbin/hotplug-call firewall
+ }
+ done
+
+ local old_aliases
+ config_get old_aliases core "${iface}_aliases"
+
+ local a
+ for a in $old_aliases; do
+ fw_configure_interface "$a" del "$old_ifname"
+ done
+
+ uci_revert_state firewall core "${iface}_zone"
+ uci_revert_state firewall core "${iface}_ifname"
+ uci_revert_state firewall core "${iface}_subnets"
+ uci_revert_state firewall core "${iface}_aliases"
+ }
+
+ [ "$action" == del ] && return
+
+ [ -z "$aliasnet" ] && {
+ local aliases
+ config_get aliases "$iface" aliases
+
+ local a
+ for a in $aliases; do
+ local ipaddr netmask ip6addr
+ config_get ipaddr "$a" ipaddr
+ config_get netmask "$a" netmask
+ config_get ip6addr "$a" ip6addr
+
+ [ -n "$ipaddr" ] && fw_configure_interface "$a" add "" "$ipaddr${netmask:+/$netmask}"
+ [ -n "$ip6addr" ] && fw_configure_interface "$a" add "" "$ip6addr"
+ done
+
+ fw_sysctl_interface $ifname
+ fw_callback post interface
+
+ uci_toggle_state firewall core "${iface}_aliases" "$aliases"
+ } || {
+ local subnets=
+ config_get subnets core "${iface}_subnets"
+ append subnets "$aliasnet"
+
+ config_set core "${iface}_subnets" "$subnets"
+ uci_toggle_state firewall core "${iface}_subnets" "$subnets"
+ }
+
+ local new_zones=
+ load_zone() {
+ fw_config_get_zone "$1"
+ list_contains zone_network "$iface" || return
+
+ fw_log info "adding $iface ($ifname${aliasnet:+ alias $aliasnet}) to zone $zone_name"
+ fw__do_rules add ${zone_name} "$ifname" "$aliasnet"
+ append new_zones $zone_name
+
+ [ -n "$aliasnet" ] || {
+ fw__uci_state_add "${zone_name}_networks" "${zone_network}"
+ env -i ACTION=add ZONE="$zone_name" INTERFACE="$iface" DEVICE="$ifname" /sbin/hotplug-call firewall
+ }
+ }
+ config_foreach load_zone zone
+
+ uci_toggle_state firewall core "${iface}_zone" "$new_zones"
+ uci_toggle_state firewall core "${iface}_ifname" "$ifname"
+}
+
+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=$FW_ACCEPT_SRC_ROUTE
+ } >/dev/null 2>/dev/null
+}
+
diff --git a/package/firewall/files/lib/core_redirect.sh b/package/firewall/files/lib/core_redirect.sh
new file mode 100644
index 000000000..fe396c1c1
--- /dev/null
+++ b/package/firewall/files/lib/core_redirect.sh
@@ -0,0 +1,130 @@
+# Copyright (C) 2009-2010 OpenWrt.org
+
+fw_config_get_redirect() {
+ [ "${redirect_NAME}" != "$1" ] || return
+ fw_config_get_section "$1" redirect { \
+ string _name "$1" \
+ string name "" \
+ string src "" \
+ ipaddr src_ip "" \
+ ipaddr src_dip "" \
+ string src_mac "" \
+ string src_port "" \
+ string src_dport "" \
+ string dest "" \
+ ipaddr dest_ip "" \
+ string dest_port "" \
+ string proto "tcpudp" \
+ string family "" \
+ string target "DNAT" \
+ string extra "" \
+ } || return
+ [ -n "$redirect_name" ] || redirect_name=$redirect__name
+}
+
+fw_load_redirect() {
+ fw_config_get_redirect "$1"
+
+ fw_callback pre redirect
+
+ local fwdchain natchain natopt nataddr natports srcdaddr srcdports
+ if [ "$redirect_target" == "DNAT" ]; then
+ [ -n "${redirect_src#*}" -a -n "$redirect_dest_ip$redirect_dest_port" ] || {
+ fw_log error "DNAT redirect ${redirect_name}: needs src and dest_ip or dest_port, skipping"
+ return 0
+ }
+
+ fwdopt=""
+ fwdchain=""
+
+ # Check whether only ports are given or whether the given dest ip is local,
+ # in this case match only DNATed traffic and allow it on input, not forward
+ if [ -z "$redirect_dest_ip" ] || /sbin/ifconfig | grep -qE "addr:${redirect_dest_ip//./\\.}\b"; then
+ fwdopt="-m conntrack --ctstate DNAT"
+ fwdchain="zone_${redirect_src}"
+ else
+ fwdchain="zone_${redirect_src}_forward"
+ fi
+
+ natopt="--to-destination"
+ natchain="zone_${redirect_src}_prerouting"
+ nataddr="$redirect_dest_ip"
+ fw_get_port_range natports "${redirect_dest_port#!}" "-"
+
+ fw_get_negation srcdaddr '-d' "${redirect_src_dip:+$redirect_src_dip/$redirect_src_dip_prefixlen}"
+ fw_get_port_range srcdports "$redirect_src_dport" ":"
+ fw_get_negation srcdports '--dport' "$srcdports"
+
+ list_contains FW_CONNTRACK_ZONES $redirect_src || \
+ append FW_CONNTRACK_ZONES $redirect_src
+
+ elif [ "$redirect_target" == "SNAT" ]; then
+ [ -n "${redirect_dest#*}" -a -n "$redirect_src_dip" ] || {
+ fw_log error "SNAT redirect ${redirect_name}: needs dest and src_dip, skipping"
+ return 0
+ }
+
+ fwdchain="${redirect_src:+zone_${redirect_src}_forward}"
+
+ natopt="--to-source"
+ natchain="zone_${redirect_dest}_nat"
+ nataddr="$redirect_src_dip"
+ fw_get_port_range natports "${redirect_src_dport#!}" "-"
+
+ fw_get_negation srcdaddr '-d' "${redirect_dest_ip:+$redirect_dest_ip/$redirect_dest_ip_prefixlen}"
+ fw_get_port_range srcdports "$redirect_dest_port" ":"
+ fw_get_negation srcdports '--dport' "$srcdports"
+
+ list_contains FW_CONNTRACK_ZONES $redirect_dest || \
+ append FW_CONNTRACK_ZONES $redirect_dest
+
+ else
+ fw_log error "redirect ${redirect_name}: target must be either DNAT or SNAT, skipping"
+ return 0
+ fi
+
+ local mode
+ fw_get_family_mode mode ${redirect_family:-x} ${redirect_src:-$redirect_dest} I
+
+ local srcaddr
+ fw_get_negation srcaddr '-s' "${redirect_src_ip:+$redirect_src_ip/$redirect_src_ip_prefixlen}"
+
+ local srcports
+ fw_get_port_range srcports "$redirect_src_port" ":"
+ fw_get_negation srcports '--sport' "$srcports"
+
+ local destaddr
+ fw_get_negation destaddr '-d' "${redirect_dest_ip:+$redirect_dest_ip/$redirect_dest_ip_prefixlen}"
+
+ local destports
+ fw_get_port_range destports "${redirect_dest_port:-$redirect_src_dport}" ":"
+ fw_get_negation destports '--dport' "$destports"
+
+ [ "$redirect_proto" == "tcpudp" ] && redirect_proto="tcp udp"
+ local pr; for pr in $redirect_proto; do
+ fw_get_negation pr '-p' "$pr"
+ local sm; for sm in ${redirect_src_mac:-""}; do
+ fw_get_negation sm '--mac-source' "$sm"
+ fw add $mode n $natchain $redirect_target + \
+ { $redirect_src_ip $redirect_dest_ip } { \
+ $srcaddr $srcdaddr $pr \
+ $srcports $srcdports \
+ ${sm:+-m mac $sm} \
+ $natopt $nataddr${natports:+:$natports} \
+ $redirect_options \
+ }
+
+ fw add $mode f ${fwdchain:-forward} ACCEPT + \
+ { $redirect_src_ip $redirect_dest_ip } { \
+ $srcaddr $destaddr \
+ $pr \
+ $srcports $destports \
+ ${sm:+-m mac $sm} \
+ $fwdopt \
+ $redirect_extra \
+ }
+ done
+ done
+
+ fw_callback post redirect
+}
diff --git a/package/firewall/files/lib/core_rule.sh b/package/firewall/files/lib/core_rule.sh
new file mode 100644
index 000000000..f49c42af5
--- /dev/null
+++ b/package/firewall/files/lib/core_rule.sh
@@ -0,0 +1,110 @@
+# Copyright (C) 2009-2010 OpenWrt.org
+
+fw_config_get_rule() {
+ [ "${rule_NAME}" != "$1" ] || return
+ fw_config_get_section "$1" rule { \
+ string _name "$1" \
+ string name "" \
+ string src "" \
+ ipaddr src_ip "" \
+ string src_mac "" \
+ string src_port "" \
+ string dest "" \
+ ipaddr dest_ip "" \
+ string dest_port "" \
+ string icmp_type "" \
+ string proto "tcpudp" \
+ string target "" \
+ string family "" \
+ string limit "" \
+ string limit_burst "" \
+ string extra "" \
+ } || return
+ [ -n "$rule_name" ] || rule_name=$rule__name
+}
+
+fw_load_rule() {
+ fw_config_get_rule "$1"
+
+ [ "$rule_target" != "NOTRACK" ] || [ -n "$rule_src" ] || [ "$rule_src" != "*" ] || {
+ fw_log error "NOTRACK rule ${rule_name}: needs src, skipping"
+ return 0
+ }
+
+ fw_callback pre rule
+
+ local table=f
+ local chain=input
+ local target="${rule_target:-REJECT}"
+ if [ "$target" == "NOTRACK" ]; then
+ table=r
+ chain="zone_${rule_src}_notrack"
+ else
+ if [ -n "$rule_src" ]; then
+ if [ "$rule_src" != "*" ]; then
+ chain="zone_${rule_src}${rule_dest:+_forward}"
+ else
+ chain="${rule_dest:+forward}"
+ chain="${chain:-input}"
+ fi
+ fi
+
+ if [ -n "$rule_dest" ]; then
+ if [ "$rule_dest" != "*" ]; then
+ target="zone_${rule_dest}_${target}"
+ elif [ "$target" = REJECT ]; then
+ target=reject
+ fi
+ fi
+ fi
+
+ local mode
+ fw_get_family_mode mode ${rule_family:-x} "$rule_src" I
+
+ local src_spec dest_spec
+ fw_get_negation src_spec '-s' "${rule_src_ip:+$rule_src_ip/$rule_src_ip_prefixlen}"
+ fw_get_negation dest_spec '-d' "${rule_dest_ip:+$rule_dest_ip/$rule_dest_ip_prefixlen}"
+
+ [ "$rule_proto" == "tcpudp" ] && rule_proto="tcp udp"
+ local pr; for pr in $rule_proto; do
+ local sports dports itypes
+ case "$pr" in
+ icmp|icmpv6|1|58)
+ sports=""; dports=""
+ itypes="$rule_icmp_type"
+ ;;
+ *)
+ sports="$rule_src_port"
+ dports="$rule_dest_port"
+ itypes=""
+ ;;
+ esac
+
+ fw_get_negation pr '-p' "$pr"
+ local sp; for sp in ${sports:-""}; do
+ fw_get_port_range sp $sp
+ fw_get_negation sp '--sport' "$sp"
+ local dp; for dp in ${dports:-""}; do
+ fw_get_port_range dp $dp
+ fw_get_negation dp '--dport' "$dp"
+ local sm; for sm in ${rule_src_mac:-""}; do
+ fw_get_negation sm '--mac-source' "$sm"
+ local it; for it in ${itypes:-""}; do
+ fw_get_negation it '--icmp-type' "$it"
+ fw add $mode $table $chain $target + \
+ { $rule_src_ip $rule_dest_ip } { \
+ $src_spec $dest_spec \
+ $pr $sp $dp $it \
+ ${sm:+-m mac $sm} \
+ ${rule_limit:+-m limit --limit $rule_limit \
+ ${rule_limit_burst:+--limit-burst $rule_limit_burst}} \
+ $rule_extra \
+ }
+ done
+ done
+ done
+ done
+ done
+
+ fw_callback post rule
+}
diff --git a/package/firewall/files/lib/fw.sh b/package/firewall/files/lib/fw.sh
new file mode 100644
index 000000000..76e294f56
--- /dev/null
+++ b/package/firewall/files/lib/fw.sh
@@ -0,0 +1,324 @@
+# Copyright (C) 2009-2010 OpenWrt.org
+# Copyright (C) 2009 Malte S. Stretz
+
+export FW_4_ERROR=0
+export FW_6_ERROR=0
+export FW_i_ERROR=0
+export FW_e_ERROR=0
+export FW_a_ERROR=0
+
+#TODO: remove this
+[ "${-#*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#G}_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 "$1" in
+ *:*) ip6=1 ;;
+ *.*.*.*) ip4=1 ;;
+ esac
+ shift
+ done
+ shift
+ if [ "${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
+ [ "$app" != ip6tables ] || [ "$tab" != nat ]
+ fw__rc $?
+ }
+
+ fw__err() {
+ local err
+ eval "err=\$FW_${fam}_ERROR"
+ fw__rc $err
+ }
+
+ local app=
+ local pol=
+ case "$fam" in
+ *4) [ $FW_DISABLE_IPV4 == 0 ] && app=iptables || return ;;
+ *6) [ $FW_DISABLE_IPV6 == 0 ] && app=ip6tables || return ;;
+ i) fw__dualip "$@"; 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 "$tgt" in
+ -) tgt= ;;
+ esac
+
+ local rule_offset
+ case "$pos" in
+ ^) pos=1 ;;
+ $) pos= ;;
+ -) pos= ;;
+ +) eval "rule_offset=\${FW__RULE_OFS_${app}_${tab}_${chn}:-1}" ;;
+ esac
+
+ if ! fw__has - family || ! fw__has $tab ; then
+ export FW_${fam}_ERROR=0
+ return 0
+ fi
+
+ case "$fam" in
+ G*) shift; while [ $# -gt 0 ] && [ "$1" != "{" ]; do shift; done ;;
+ esac
+
+ if [ $# -gt 0 ]; then
+ shift
+ if [ $cmd == delete ]; then
+ pos=
+ fi
+ fi
+
+ local cmdline="$app --table ${tab} --${cmd} ${chn} ${pol} ${rule_offset:-${pos}} ${tgt:+--jump "$tgt"}"
+ while [ $# -gt 1 ]; do
+ # special parameter handling
+ case "$1:$2" in
+ -p:icmp*|-p:1|-p:58|--protocol:icmp*|--protocol:1|--protocol:58)
+ [ "$app" = ip6tables ] && \
+ cmdline="$cmdline -p icmpv6" || \
+ cmdline="$cmdline -p icmp"
+ shift
+ ;;
+ --icmp-type:*|--icmpv6-type:*)
+ local icmp_type
+ if [ "$app" = ip6tables ] && fw_check_icmptype6 icmp_type "$2"; then
+ cmdline="$cmdline $icmp_type"
+ elif [ "$app" = iptables ] && fw_check_icmptype4 icmp_type "$2"; then
+ cmdline="$cmdline $icmp_type"
+ else
+ local fam=IPv4; [ "$app" = ip6tables ] && fam=IPv6
+ fw_log info "ICMP type '$2' is not valid for $fam address family, skipping rule"
+ return 1
+ fi
+ shift
+ ;;
+ *) cmdline="$cmdline $1" ;;
+ esac
+ shift
+ done
+
+ [ -n "$FW_TRACE" ] && echo $cmdline >&2
+
+ $cmdline
+
+ local rv=$?
+ [ $rv -eq 0 ] && [ -n "$rule_offset" ] && \
+ export -- "FW__RULE_OFS_${app}_${tab}_${chn}=$(($rule_offset + 1))"
+ fw__rc $rv
+}
+
+fw_get_port_range() {
+ local _var=$1
+ local _ports=$2
+ local _delim=${3:-:}
+ if [ "$4" ]; then
+ fw_get_port_range $_var "${_ports}-${4}" $_delim
+ return
+ fi
+
+ local _first=${_ports%-*}
+ local _last=${_ports#*-}
+ if [ "${_first#!}" != "${_last#!}" ]; then
+ export -- "$_var=$_first$_delim${_last#!}"
+ else
+ export -- "$_var=$_first"
+ fi
+}
+
+fw_get_family_mode() {
+ local _var="$1"
+ local _hint="$2"
+ local _zone="$3"
+ local _mode="$4"
+
+ local _ipv4 _ipv6
+ [ "$_zone" != "*" ] && {
+ [ -n "$FW_ZONES4$FW_ZONES6" ] && {
+ list_contains FW_ZONES4 "$_zone" && _ipv4=1 || _ipv4=0
+ list_contains FW_ZONES6 "$_zone" && _ipv6=1 || _ipv6=0
+ } || {
+ _ipv4=$(uci_get_state firewall core "${_zone}_ipv4" 0)
+ _ipv6=$(uci_get_state firewall core "${_zone}_ipv6" 0)
+ }
+ } || {
+ _ipv4=1
+ _ipv6=1
+ }
+
+ case "$_hint:$_ipv4:$_ipv6" in
+ *4:1:*|*:1:0) export -n -- "$_var=G4" ;;
+ *6:*:1|*:0:1) export -n -- "$_var=G6" ;;
+ *) export -n -- "$_var=$_mode" ;;
+ esac
+}
+
+fw_get_negation() {
+ local _var="$1"
+ local _flag="$2"
+ local _value="$3"
+
+ [ "${_value#!}" != "$_value" ] && \
+ export -n -- "$_var=! $_flag ${_value#!}" || \
+ export -n -- "$_var=${_value:+$_flag $_value}"
+}
+
+fw_get_subnet4() {
+ local _var="$1"
+ local _flag="$2"
+ local _name="$3"
+
+ local _ipaddr="$(uci_get_state network "${_name#!}" ipaddr)"
+ local _netmask="$(uci_get_state network "${_name#!}" netmask)"
+
+ case "$_ipaddr" in
+ *.*.*.*)
+ [ "${_name#!}" != "$_name" ] && \
+ export -n -- "$_var=! $_flag $_ipaddr/${_netmask:-255.255.255.255}" || \
+ export -n -- "$_var=$_flag $_ipaddr/${_netmask:-255.255.255.255}"
+ return 0
+ ;;
+ esac
+
+ export -n -- "$_var="
+ return 1
+}
+
+fw_check_icmptype4() {
+ local _var="$1"
+ local _type="$2"
+ case "$_type" in
+ ![0-9]*) export -n -- "$_var=! --icmp-type ${_type#!}"; return 0 ;;
+ [0-9]*) export -n -- "$_var=--icmp-type $_type"; return 0 ;;
+ esac
+
+ [ -z "$FW_ICMP4_TYPES" ] && \
+ export FW_ICMP4_TYPES=$(
+ iptables -p icmp -h 2>/dev/null | \
+ sed -n -e '/^Valid ICMP Types:/ {
+ n; :r; s/[()]/ /g; s/[[:space:]]\+/\n/g; p; n; b r
+ }' | sort -u
+ )
+
+ local _check
+ for _check in $FW_ICMP4_TYPES; do
+ if [ "$_check" = "${_type#!}" ]; then
+ [ "${_type#!}" != "$_type" ] && \
+ export -n -- "$_var=! --icmp-type ${_type#!}" || \
+ export -n -- "$_var=--icmp-type $_type"
+ return 0
+ fi
+ done
+
+ export -n -- "$_var="
+ return 1
+}
+
+fw_check_icmptype6() {
+ local _var="$1"
+ local _type="$2"
+ case "$_type" in
+ ![0-9]*) export -n -- "$_var=! --icmpv6-type ${_type#!}"; return 0 ;;
+ [0-9]*) export -n -- "$_var=--icmpv6-type $_type"; return 0 ;;
+ esac
+
+ [ -z "$FW_ICMP6_TYPES" ] && \
+ export FW_ICMP6_TYPES=$(
+ ip6tables -p icmpv6 -h 2>/dev/null | \
+ sed -n -e '/^Valid ICMPv6 Types:/ {
+ n; :r; s/[()]/ /g; s/[[:space:]]\+/\n/g; p; n; b r
+ }' | sort -u
+ )
+
+ local _check
+ for _check in $FW_ICMP6_TYPES; do
+ if [ "$_check" = "${_type#!}" ]; then
+ [ "${_type#!}" != "$_type" ] && \
+ export -n -- "$_var=! --icmpv6-type ${_type#!}" || \
+ export -n -- "$_var=--icmpv6-type $_type"
+ return 0
+ fi
+ done
+
+ export -n -- "$_var="
+ return 1
+}
diff --git a/package/firewall/files/lib/uci_firewall.sh b/package/firewall/files/lib/uci_firewall.sh
new file mode 100644
index 000000000..7c95a7a93
--- /dev/null
+++ b/package/firewall/files/lib/uci_firewall.sh
@@ -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
+}
diff --git a/package/firewall/files/reflection.hotplug b/package/firewall/files/reflection.hotplug
new file mode 100644
index 000000000..843c615bc
--- /dev/null
+++ b/package/firewall/files/reflection.hotplug
@@ -0,0 +1,132 @@
+#!/bin/sh
+
+. /lib/functions.sh
+. /lib/functions/network.sh
+
+if [ "$ACTION" = "add" ] && [ "$INTERFACE" = "wan" ]; then
+ local wanip
+ network_get_ipaddr wanip wan || return
+
+ iptables -t nat -F nat_reflection_in 2>/dev/null || {
+ iptables -t nat -N nat_reflection_in
+ iptables -t nat -A prerouting_rule -j nat_reflection_in
+ }
+
+ iptables -t nat -F nat_reflection_out 2>/dev/null || {
+ iptables -t nat -N nat_reflection_out
+ iptables -t nat -A postrouting_rule -j nat_reflection_out
+ }
+
+ 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
+ }
+
+ find_networks() {
+ find_networks_cb() {
+ local cfg="$1"
+ local zone="$2"
+
+ local name
+ config_get name "$cfg" name
+
+ [ "$name" = "$zone" ] && {
+ local network
+ config_get network "$cfg" network
+
+ echo ${network:-$zone}
+ return 1
+ }
+ }
+
+ config_foreach find_networks_cb zone "$1"
+ }
+
+ setup_fwd() {
+ local cfg="$1"
+
+ local reflection
+ config_get_bool reflection "$cfg" reflection 1
+ [ "$reflection" == 1 ] || return
+
+ local src
+ config_get src "$cfg" src
+
+ local target
+ config_get target "$cfg" target DNAT
+
+ [ "$src" = wan ] && [ "$target" = DNAT ] && {
+ local dest
+ config_get dest "$cfg" dest "lan"
+ [ "$dest" != "*" ] || return
+
+ local net
+ for net in $(find_networks "$dest"); do
+ local lannet
+ network_get_subnet lannet "$net" || return
+
+ local proto
+ config_get proto "$cfg" proto
+
+ local epmin epmax extport
+ config_get extport "$cfg" src_dport "1-65535"
+ [ -n "$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
+
+ [ "$proto" = all ] && proto="tcp udp"
+ [ "$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 $lannet -d $exthost \
+ -p $p $extport \
+ -j DNAT --to $inthost:${ipmin#!}${ipmax:+-$ipmax}
+
+ iptables -t nat -A nat_reflection_out \
+ -s $lannet -d $inthost \
+ -p $p $intport \
+ -j SNAT --to-source ${lannet%%/*}
+
+ iptables -t filter -A nat_reflection_fwd \
+ -s $lannet -d $inthost \
+ -p $p $intport \
+ -j ACCEPT
+ ;;
+ esac
+ done
+ done
+ }
+ }
+
+ config_load firewall
+ config_foreach setup_fwd redirect
+fi
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-25 07:21:54 +0000