[backfire] merge dual stack firewall

git-svn-id: svn://svn.openwrt.org/openwrt/branches/backfire@25353 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/firewall/files/lib/core.sh

@@ -0,0 +1,153 @@
+# Copyright (C) 2009-2010 OpenWrt.org
+
+FW_LIBDIR=${FW_LIBDIR:-/lib/firewall}
+
+. $FW_LIBDIR/fw.sh
+include /lib/network
+
+fw_start() {
+	fw_init
+
+	FW_DEFAULTS_APPLIED=
+
+	fw_is_loaded && {
+		echo "firewall already loaded" >&2
+		exit 1
+	}
+
+	uci_set_state firewall core "" firewall_state
+
+	fw_clear DROP
+
+	fw_callback pre core
+
+	echo "Loading defaults"
+	fw_config_once fw_load_defaults defaults
+
+	echo "Loading zones"
+	config_foreach fw_load_zone zone
+
+	echo "Loading forwardings"
+	config_foreach fw_load_forwarding forwarding
+
+	echo "Loading redirects"
+	config_foreach fw_load_redirect redirect
+
+	echo "Loading rules"
+	config_foreach fw_load_rule rule
+
+	echo "Loading includes"
+	config_foreach fw_load_include include
+
+	[ -z "$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
+	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
+}