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[backfire] drop firewall v1
git-svn-id: svn://svn.openwrt.org/openwrt/branches/backfire@25352 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
jow
parent
5f0c6224f7
commit
67a112aafe
@ -1,53 +0,0 @@
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#
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# Copyright (C) 2008-2009 OpenWrt.org
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#
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# This is free software, licensed under the GNU General Public License v2.
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# See /LICENSE for more information.
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include $(TOPDIR)/rules.mk
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PKG_NAME:=firewall
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PKG_VERSION:=1
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PKG_RELEASE:=21
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include $(INCLUDE_DIR)/package.mk
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define Package/firewall
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SECTION:=net
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CATEGORY:=Base system
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URL:=http://openwrt.org/
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TITLE:=OpenWrt firewall
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DEPENDS:=+iptables +iptables-mod-conntrack +iptables-mod-nat
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PKGARCH:=all
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endef
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define Package/firewall/description
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UCI based firewall for OpenWrt
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endef
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define Build/Compile
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true
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endef
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define Package/firewall/conffiles
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/etc/config/firewall
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/etc/firewall.user
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endef
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define Package/firewall/install
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$(INSTALL_DIR) $(1)/lib/firewall
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$(INSTALL_DATA) ./files/uci_firewall.sh $(1)/lib/firewall
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$(INSTALL_DIR) $(1)/etc/config
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$(INSTALL_DATA) ./files/firewall.config $(1)/etc/config/firewall
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$(INSTALL_DIR) $(1)/etc/init.d/
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$(INSTALL_BIN) ./files/firewall.init $(1)/etc/init.d/firewall
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$(INSTALL_DIR) $(1)/etc/hotplug.d/iface
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$(INSTALL_DATA) ./files/20-firewall $(1)/etc/hotplug.d/iface
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$(INSTALL_DIR) $(1)/etc/hotplug.d/firewall
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$(INSTALL_DATA) ./files/reflection.hotplug $(1)/etc/hotplug.d/firewall/10-nat-reflection
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$(INSTALL_DIR) $(1)/etc
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$(INSTALL_DATA) ./files/firewall.user $(1)/etc
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endef
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$(eval $(call BuildPackage,firewall))
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@ -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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@ -1,96 +0,0 @@
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config defaults
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option syn_flood 1
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option input ACCEPT
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option output ACCEPT
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option forward REJECT
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config zone
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option name lan
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option input ACCEPT
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option output ACCEPT
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option forward REJECT
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config zone
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option name wan
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option input REJECT
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option output ACCEPT
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option forward REJECT
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option masq 1
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option mtu_fix 1
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config forwarding
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option src lan
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option dest wan
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# We need to accept udp packets on port 68,
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# see https://dev.openwrt.org/ticket/4108
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config rule
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option src wan
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option proto udp
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option dest_port 68
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option target ACCEPT
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#Allow ping
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config rule
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option src wan
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option proto icmp
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option icmp_type echo-request
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option target ACCEPT
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# include a file with users custom iptables rules
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config include
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option path /etc/firewall.user
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### EXAMPLE CONFIG SECTIONS
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# do not allow a specific ip to access wan
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#config rule
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# option src lan
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# option src_ip 192.168.45.2
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# option dest wan
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# option proto tcp
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# option target REJECT
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# block a specific mac on wan
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#config rule
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# option dest wan
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# option src_mac 00:11:22:33:44:66
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# option target REJECT
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# block incoming ICMP traffic on a zone
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#config rule
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# option src lan
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# option proto ICMP
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# option target DROP
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# port redirect port coming in on wan to lan
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#config redirect
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# option src wan
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# option src_dport 80
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# option dest lan
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# option dest_ip 192.168.16.235
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# option dest_port 80
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# option proto tcp
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### FULL CONFIG SECTIONS
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#config rule
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# option src lan
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# option src_ip 192.168.45.2
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# option src_mac 00:11:22:33:44:55
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# option src_port 80
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# option dest wan
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# option dest_ip 194.25.2.129
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# option dest_port 120
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# option proto tcp
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# option target REJECT
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#config redirect
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# option src lan
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# option src_ip 192.168.45.2
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# option src_mac 00:11:22:33:44:55
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# option src_port 1024
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# option src_dport 80
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# option dest_ip 194.25.2.129
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# option dest_port 120
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# option proto tcp
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@ -1,14 +0,0 @@
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#!/bin/sh /etc/rc.common
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# Copyright (C) 2008 OpenWrt.org
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START=45
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start() {
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. /lib/firewall/uci_firewall.sh
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fw_init
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}
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stop() {
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. /lib/firewall/uci_firewall.sh
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fw_stop
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}
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@ -1,4 +0,0 @@
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# This file is interpreted as shell script.
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# Put your custom iptables rules here, they will
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# be executed with each firewall (re-)start.
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@ -1,120 +0,0 @@
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#!/bin/sh
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. /etc/functions.sh
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if [ "$ACTION" = "add" ] && [ "$INTERFACE" = "wan" ]; then
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local wanip=$(uci -P/var/state get network.wan.ipaddr)
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iptables -t nat -F nat_reflection_in 2>/dev/null || {
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iptables -t nat -N nat_reflection_in
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iptables -t nat -A prerouting_rule -j nat_reflection_in
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}
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iptables -t nat -F nat_reflection_out 2>/dev/null || {
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iptables -t nat -N nat_reflection_out
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iptables -t nat -A postrouting_rule -j nat_reflection_out
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}
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iptables -t filter -F nat_reflection_fwd 2>/dev/null || {
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iptables -t filter -N nat_reflection_fwd
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iptables -t filter -A forwarding_rule -j nat_reflection_fwd
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}
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find_networks() {
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find_networks_cb() {
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local cfg="$1"
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local zone="$2"
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local name
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config_get name "$cfg" name
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[ "$name" = "$zone" ] && {
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local network
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config_get network "$cfg" network
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echo ${network:-$zone}
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return 1
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}
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}
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config_foreach find_networks_cb zone "$1"
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}
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setup_fwd() {
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local cfg="$1"
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local reflection
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config_get_bool reflection "$cfg" reflection 1
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[ "$reflection" == 1 ] || return
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local src
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config_get src "$cfg" src
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local target
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config_get target "$cfg" target
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[ "$src" = wan ] && [ "${target:-DNAT}" = DNAT ] && {
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local dest
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config_get dest "$cfg" dest "lan"
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local net
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for net in $(find_networks "$dest"); do
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local lanip=$(uci -P/var/state get network.$net.ipaddr)
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local lanmk=$(uci -P/var/state get network.$net.netmask)
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local proto
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config_get proto "$cfg" proto
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local epmin epmax extport
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config_get extport "$cfg" src_dport
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[ -n "$extport" ] || return
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epmin="${extport%[-:]*}"; epmax="${extport#*[-:]}"
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[ "$epmin" != "$epmax" ] || epmax=""
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local ipmin ipmax intport
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config_get intport "$cfg" dest_port "$extport"
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ipmin="${intport%[-:]*}"; ipmax="${intport#*[-:]}"
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[ "$ipmin" != "$ipmax" ] || ipmax=""
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local exthost
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config_get exthost "$cfg" src_dip "$wanip"
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local inthost
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config_get inthost "$cfg" dest_ip
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[ -n "$inthost" ] || return
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[ "$proto" = tcpudp ] && proto="tcp udp"
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[ "${inthost#!}" = "$inthost" ] || return 0
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[ "${exthost#!}" = "$exthost" ] || return 0
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local p
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for p in ${proto:-tcp udp}; do
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case "$p" in
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tcp|udp)
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iptables -t nat -A nat_reflection_in \
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-s $lanip/$lanmk -d $exthost \
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-p $p --dport $epmin${epmax:+:$epmax} \
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-j DNAT --to $inthost:$ipmin${ipmax:+-$ipmax}
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iptables -t nat -A nat_reflection_out \
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-s $lanip/$lanmk -d $inthost \
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-p $p --dport $ipmin${ipmax:+:$ipmax} \
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-j SNAT --to-source $lanip
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iptables -t filter -A nat_reflection_fwd \
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-s $lanip/$lanmk -d $inthost \
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-p $p --dport $ipmin${ipmax:+:$ipmax} \
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-j ACCEPT
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;;
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esac
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done
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done
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}
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}
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config_load firewall
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config_foreach setup_fwd redirect
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fi
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@ -1,684 +0,0 @@
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#!/bin/sh
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# Copyright (C) 2008 John Crispin <blogic@openwrt.org>
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. /etc/functions.sh
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IPTABLES="echo iptables"
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IPTABLES=iptables
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config_clear
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include /lib/network
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scan_interfaces
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CONFIG_APPEND=1
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config_load firewall
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config fw_zones
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ZONE_LIST=$CONFIG_SECTION
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ZONE_NAMES=
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CUSTOM_CHAINS=1
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DEF_INPUT=DROP
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DEF_OUTPUT=DROP
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DEF_FORWARD=DROP
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CONNTRACK_ZONES=
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NOTRACK_DISABLED=
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add_state() {
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local var="$1"
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local item="$2"
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local val="$(uci_get_state firewall core $var)"
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uci_set_state firewall core $var "${val:+$val }$item"
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}
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del_state() {
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local var="$1"
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local item="$2"
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local val=" $(uci_get_state firewall core $var) "
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val="${val// $item / }"
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val="${val# }"
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val="${val% }"
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uci_set_state firewall core $var "$val"
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}
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find_item() {
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local item="$1"; shift
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for i in "$@"; do
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[ "$i" = "$item" ] && return 0
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done
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return 1
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}
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get_portrange() {
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local _var="$1"
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local _range="$2"
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local _delim="${3:-:}"
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local _min="${_range%%[:-]*}"
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local _max="${_range##*[:-]}"
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[ -n "$_min" ] && [ -n "$_max" ] && [ "$_min" != "$_max" ] && \
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export -n -- "$_var=$_min$_delim$_max" || \
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export -n -- "$_var=${_min:-$_max}"
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}
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get_negation() {
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local _var="$1"
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local _flag="$2"
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local _ipaddr="$3"
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[ "${_ipaddr#!}" != "$_ipaddr" ] && \
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export -n -- "$_var=! $_flag ${_ipaddr#!}" || \
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export -n -- "$_var=${_ipaddr:+$_flag $_ipaddr}"
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}
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load_policy() {
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config_get input $1 input
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config_get output $1 output
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config_get forward $1 forward
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DEF_INPUT="${input:-$DEF_INPUT}"
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DEF_OUTPUT="${output:-$DEF_OUTPUT}"
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DEF_FORWARD="${forward:-$DEF_FORWARD}"
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}
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create_zone() {
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local name="$1"
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local network="$2"
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local input="$3"
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local output="$4"
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local forward="$5"
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local mtu_fix="$6"
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local masq="$7"
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local masq_src="$8"
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local masq_dest="$9"
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local exists
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[ "$name" == "loopback" ] && return
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config_get exists $ZONE_LIST $name
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[ -n "$exists" ] && return
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config_set $ZONE_LIST $name 1
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$IPTABLES -N zone_${name}
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$IPTABLES -N zone_${name}_MSSFIX
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$IPTABLES -N zone_${name}_ACCEPT
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$IPTABLES -N zone_${name}_DROP
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$IPTABLES -N zone_${name}_REJECT
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$IPTABLES -N zone_${name}_forward
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[ "$output" ] && $IPTABLES -A output -j zone_${name}_${output}
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$IPTABLES -N zone_${name}_nat -t nat
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$IPTABLES -N zone_${name}_prerouting -t nat
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$IPTABLES -t raw -N zone_${name}_notrack
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[ "$mtu_fix" == "1" ] && $IPTABLES -I FORWARD 1 -j zone_${name}_MSSFIX
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if [ "$masq" == "1" ]; then
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local msrc mdst
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for msrc in ${masq_src:-0.0.0.0/0}; do
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get_negation msrc '-s' "$msrc"
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for mdst in ${masq_dest:-0.0.0.0/0}; do
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get_negation mdst '-d' "$mdst"
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$IPTABLES -A zone_${name}_nat -t nat $msrc $mdst -j MASQUERADE
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done
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done
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fi
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append ZONE_NAMES "$name"
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}
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addif() {
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local network="$1"
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local ifname="$2"
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local zone="$3"
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local n_if n_zone
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config_get n_if core "${network}_ifname"
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config_get n_zone core "${network}_zone"
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[ -n "$n_zone" ] && {
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if [ "$n_zone" != "$zone" ]; then
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delif "$network" "$n_if" "$n_zone"
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else
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return
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fi
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}
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logger "adding $network ($ifname) to firewall zone $zone"
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$IPTABLES -A input -i "$ifname" -j zone_${zone}
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$IPTABLES -I zone_${zone}_MSSFIX 1 -o "$ifname" -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu
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$IPTABLES -I zone_${zone}_ACCEPT 1 -o "$ifname" -j ACCEPT
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$IPTABLES -I zone_${zone}_DROP 1 -o "$ifname" -j DROP
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$IPTABLES -I zone_${zone}_REJECT 1 -o "$ifname" -j reject
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$IPTABLES -I zone_${zone}_ACCEPT 1 -i "$ifname" -j ACCEPT
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$IPTABLES -I zone_${zone}_DROP 1 -i "$ifname" -j DROP
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$IPTABLES -I zone_${zone}_REJECT 1 -i "$ifname" -j reject
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$IPTABLES -I PREROUTING 1 -t nat -i "$ifname" -j zone_${zone}_prerouting
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$IPTABLES -I POSTROUTING 1 -t nat -o "$ifname" -j zone_${zone}_nat
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$IPTABLES -A forward -i "$ifname" -j zone_${zone}_forward
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$IPTABLES -I PREROUTING 1 -t raw -i "$ifname" -j zone_${zone}_notrack
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uci_set_state firewall core "${network}_ifname" "$ifname"
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uci_set_state firewall core "${network}_zone" "$zone"
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add_state "${zone}_networks" "$network"
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ACTION=add ZONE="$zone" INTERFACE="$network" DEVICE="$ifname" /sbin/hotplug-call firewall
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}
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delif() {
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local network="$1"
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local ifname="$2"
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local zone="$3"
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logger "removing $network ($ifname) from firewall zone $zone"
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$IPTABLES -D input -i "$ifname" -j zone_$zone
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$IPTABLES -D zone_${zone}_MSSFIX -o "$ifname" -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu
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$IPTABLES -D zone_${zone}_ACCEPT -o "$ifname" -j ACCEPT
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$IPTABLES -D zone_${zone}_DROP -o "$ifname" -j DROP
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$IPTABLES -D zone_${zone}_REJECT -o "$ifname" -j reject
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$IPTABLES -D zone_${zone}_ACCEPT -i "$ifname" -j ACCEPT
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$IPTABLES -D zone_${zone}_DROP -i "$ifname" -j DROP
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$IPTABLES -D zone_${zone}_REJECT -i "$ifname" -j reject
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$IPTABLES -D PREROUTING -t nat -i "$ifname" -j zone_${zone}_prerouting
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$IPTABLES -D POSTROUTING -t nat -o "$ifname" -j zone_${zone}_nat
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$IPTABLES -D forward -i "$ifname" -j zone_${zone}_forward
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$IPTABLES -D PREROUTING -t raw -i "$ifname" -j zone_${zone}_notrack
|
||||
|
||||
uci_revert_state firewall core "${network}_ifname"
|
||||
uci_revert_state firewall core "${network}_zone"
|
||||
|
||||
del_state "${zone}_networks" "$network"
|
||||
|
||||
ACTION=remove ZONE="$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 mtu_fix
|
||||
local conntrack
|
||||
local masq
|
||||
local masq_src
|
||||
local masq_dest
|
||||
|
||||
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
|
||||
config_get masq_src $1 masq_src
|
||||
config_get masq_dest $1 masq_dest
|
||||
|
||||
load_policy $1
|
||||
[ "$conntrack" = "1" -o "$masq" = "1" ] && append CONNTRACK_ZONES "$name"
|
||||
[ -z "$network" ] && network=$name
|
||||
|
||||
create_zone "$name" "$network" "$input" "$output" "$forward" "$mtu_fix" \
|
||||
"$masq" "$masq_src" "$masq_dest"
|
||||
|
||||
fw_custom_chains_zone "$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 $1 ruleset
|
||||
|
||||
[ "$target" != "NOTRACK" ] || [ -n "$src" ] || {
|
||||
echo "NOTRACK rule needs src"
|
||||
return
|
||||
}
|
||||
|
||||
local srcaddr destaddr
|
||||
get_negation srcaddr '-s' "$src_ip"
|
||||
get_negation destaddr '-d' "$dest_ip"
|
||||
|
||||
local srcports destports
|
||||
get_portrange srcports "$src_port" ":"
|
||||
get_portrange destports "$dest_port" ":"
|
||||
|
||||
ZONE=input
|
||||
TABLE=filter
|
||||
TARGET="${target:-DROP}"
|
||||
|
||||
if [ "$TARGET" = "NOTRACK" ]; then
|
||||
TABLE=raw
|
||||
ZONE="zone_${src}_notrack"
|
||||
else
|
||||
[ -n "$src" ] && ZONE="zone_${src}${dest:+_forward}"
|
||||
[ -n "$dest" ] && TARGET="zone_${dest}_${TARGET}"
|
||||
fi
|
||||
|
||||
add_rule() {
|
||||
local pos
|
||||
eval 'pos=$((++FW__RULE_COUNT_'$ZONE'))'
|
||||
|
||||
$IPTABLES -t $TABLE -I $ZONE $pos \
|
||||
$srcaddr $destaddr \
|
||||
${proto:+-p $proto} \
|
||||
${icmp_type:+--icmp-type $icmp_type} \
|
||||
${srcports:+--sport $srcports} \
|
||||
${src_mac:+-m mac --mac-source $src_mac} \
|
||||
${destports:+--dport $destports} \
|
||||
-j $TARGET
|
||||
}
|
||||
|
||||
[ "$proto" == "tcpudp" ] && proto="tcp udp"
|
||||
for proto in ${proto:-tcp udp}; do
|
||||
add_rule
|
||||
done
|
||||
}
|
||||
|
||||
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_dip
|
||||
local src_port
|
||||
local src_dport
|
||||
local src_mac
|
||||
local dest
|
||||
local dest_ip
|
||||
local dest_port
|
||||
local proto
|
||||
local target
|
||||
|
||||
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 $1 dest
|
||||
config_get dest_ip $1 dest_ip
|
||||
config_get dest_port $1 dest_port
|
||||
config_get proto $1 proto
|
||||
config_get target $1 target
|
||||
|
||||
local fwdchain natchain natopt nataddr natports srcdaddr srcdports
|
||||
if [ "${target:-DNAT}" == "DNAT" ]; then
|
||||
[ -n "$src" -a -n "$dest_ip$dest_port" ] || {
|
||||
echo "DNAT redirect needs src and dest_ip or dest_port"
|
||||
return
|
||||
}
|
||||
|
||||
fwdchain="zone_${src}_forward"
|
||||
|
||||
natopt="--to-destination"
|
||||
natchain="zone_${src}_prerouting"
|
||||
nataddr="$dest_ip"
|
||||
get_portrange natports "$dest_port" "-"
|
||||
|
||||
get_negation srcdaddr '-d' "$src_dip"
|
||||
get_portrange srcdports "$src_dport" ":"
|
||||
|
||||
find_item "$src" $CONNTRACK_ZONES || \
|
||||
append CONNTRACK_ZONES "$src"
|
||||
|
||||
elif [ "$target" == "SNAT" ]; then
|
||||
[ -n "$dest" -a -n "$src_dip" ] || {
|
||||
echo "SNAT redirect needs dest and src_dip"
|
||||
return
|
||||
}
|
||||
|
||||
fwdchain="${src:+zone_${src}_forward}"
|
||||
|
||||
natopt="--to-source"
|
||||
natchain="zone_${dest}_nat"
|
||||
nataddr="$src_dip"
|
||||
get_portrange natports "$src_dport" "-"
|
||||
|
||||
get_negation srcdaddr '-d' "$dest_ip"
|
||||
get_portrange srcdports "$dest_port" ":"
|
||||
|
||||
find_item "$dest" $CONNTRACK_ZONES || \
|
||||
append CONNTRACK_ZONES "$dest"
|
||||
|
||||
else
|
||||
echo "redirect target must be either DNAT or SNAT"
|
||||
return
|
||||
fi
|
||||
|
||||
local srcaddr destaddr
|
||||
get_negation srcaddr '-s' "$src_ip"
|
||||
get_negation destaddr '-d' "$dest_ip"
|
||||
|
||||
local srcports destports
|
||||
get_portrange srcports "$src_port" ":"
|
||||
get_portrange destports "${dest_port-$src_dport}" ":"
|
||||
|
||||
add_rule() {
|
||||
local pos
|
||||
eval 'pos=$((++FW__REDIR_COUNT_'$natchain'))'
|
||||
|
||||
$IPTABLES -I $natchain $pos -t nat \
|
||||
$srcaddr $srcdaddr \
|
||||
${proto:+-p $proto} \
|
||||
${srcports:+--sport $srcports} \
|
||||
${srcdports:+--dport $srcdports} \
|
||||
${src_mac:+-m mac --mac-source $src_mac} \
|
||||
-j ${target:-DNAT} $natopt $nataddr${natports:+:$natports}
|
||||
|
||||
[ -n "$dest_ip" ] && \
|
||||
$IPTABLES -I ${fwdchain:-forward} 1 \
|
||||
$srcaddr $destaddr \
|
||||
${proto:+-p $proto} \
|
||||
${srcports:+--sport $srcports} \
|
||||
${destports:+--dport $destports} \
|
||||
${src_mac:+-m mac --mac-source $src_mac} \
|
||||
-j ACCEPT
|
||||
}
|
||||
|
||||
[ "$proto" == "tcpudp" ] && proto="tcp udp"
|
||||
for proto in ${proto:-tcp udp}; do
|
||||
add_rule
|
||||
done
|
||||
}
|
||||
|
||||
fw_include() {
|
||||
local path
|
||||
config_get path $1 path
|
||||
[ -e $path ] && . $path
|
||||
}
|
||||
|
||||
get_interface_zones() {
|
||||
local interface="$2"
|
||||
local name
|
||||
local network
|
||||
local masq_src
|
||||
local masq_dest
|
||||
config_get name $1 name
|
||||
config_get network $1 network
|
||||
config_get masq_src $1 masq_src
|
||||
config_get masq_dest $1 masq_dest
|
||||
[ -z "$network" ] && network=$name
|
||||
for n in $network; do
|
||||
[ "$n" = "$interface" ] && {
|
||||
append add_zone "$name"
|
||||
append add_masq_src "$masq_src"
|
||||
append add_masq_dest "$masq_dest"
|
||||
}
|
||||
done
|
||||
}
|
||||
|
||||
fw_event() {
|
||||
local action="$1"
|
||||
local interface="$2"
|
||||
local ifname="$(sh -c ". /etc/functions.sh; include /lib/network; scan_interfaces; config_get "$interface" ifname")"
|
||||
local add_zone=
|
||||
local add_masq_src=
|
||||
local add_masq_dest=
|
||||
local up
|
||||
|
||||
[ -z "$ifname" ] && return 0
|
||||
config_foreach get_interface_zones zone "$interface"
|
||||
[ -z "$add_zone" ] && return 0
|
||||
|
||||
case "$action" in
|
||||
ifup)
|
||||
for z in $add_zone; do
|
||||
local loaded masq_src masq_dest
|
||||
config_get loaded core loaded
|
||||
[ -n "$loaded" ] && addif "$interface" "$ifname" "$z" "$add_masq_src" "$add_masq_dest"
|
||||
done
|
||||
;;
|
||||
ifdown)
|
||||
config_get up "$interface" up
|
||||
|
||||
for z in $ZONE; do
|
||||
local masq_src masq_dest
|
||||
config_get masq_src core "${z}_masq_src"
|
||||
config_get masq_dest core "${z}_masq_dest"
|
||||
[ "$up" == "1" ] && delif "$interface" "$ifname" "$z" "$masq_src" "$masq_dest"
|
||||
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
|
||||
|
||||
uci_set_state firewall core zones "$ZONE_NAMES"
|
||||
}
|
||||
|
||||
fw_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
|
||||
done
|
||||
|
||||
fw_clear
|
||||
$IPTABLES -P INPUT ACCEPT
|
||||
$IPTABLES -P OUTPUT ACCEPT
|
||||
$IPTABLES -P FORWARD ACCEPT
|
||||
uci_revert_state firewall
|
||||
}
|
||||
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Reference in New Issue
Block a user