base-files: move network related scripts to a separate package to make the transition to netifd easier

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@28495 3c298f89-4303-0410-b956-a3cf2f4a3e73

8 files changed, 979 insertions, 0 deletions

diff --git a/package/base-files-network/files/etc/hotplug.d/iface/00-netstate b/package/base-files-network/files/etc/hotplug.d/iface/00-netstate
new file mode 100644
index 000000000..37b1e934e
--- /dev/null
+++ b/package/base-files-network/files/etc/hotplug.d/iface/00-netstate
@@ -0,0 +1,5 @@
+[ ifup = "$ACTION" ] && {
+	uci_toggle_state network "$INTERFACE" up 1 
+	uci_toggle_state network "$INTERFACE" connect_time $(sed -ne 's![^0-9].*$!!p' /proc/uptime)
+	[ -n "$DEVICE" ] && uci_toggle_state network "$INTERFACE" ifname "$DEVICE"
+}
diff --git a/package/base-files-network/files/etc/hotplug.d/iface/10-routes b/package/base-files-network/files/etc/hotplug.d/iface/10-routes
new file mode 100644
index 000000000..d57a5b3c7
--- /dev/null
+++ b/package/base-files-network/files/etc/hotplug.d/iface/10-routes
@@ -0,0 +1,137 @@
+add_route() {
+	local config="$1"
+
+	# is this route intended for the
+	# $INTERFACE of this hotplug event
+	config_get interface "$config" interface
+	[ "$interface" != "$INTERFACE" ] && return 0
+	
+	# get the real interface name from network config
+	config_get dev "$interface" ifname
+
+	config_get target "$config" target
+	config_get netmask "$config" netmask
+	config_get gateway "$config" gateway
+	config_get metric "$config" metric
+	config_get mtu "$config" mtu
+
+	# make sure there is a gateway and a target
+	[ -n "$target" ] || {
+		echo "Missing target in route section $config"
+		return 1
+	}
+	[ -n "$gateway" ] || {
+		config_get gateway "$interface" gateway
+	}
+
+	# handle "0.0.0.0" as "no gateway given" to allow
+	# defining gateway-less routes while still keeping
+	# the possibility to have static routes with a
+	# proper gateway on interfaces with dynamic ips 
+	[ "$gateway" = "0.0.0.0" ] && gateway=""
+
+	dest="${netmask:+-net "$target" netmask "$netmask"}"
+	dest="${dest:--host "$target"}"
+	
+	/sbin/route add $dest ${gateway:+gw "$gateway"} \
+		${dev:+dev "$dev"} ${metric:+ metric "$metric"} \
+		${mtu:+mss "$mtu"}
+}
+
+add_route6() {
+	local config="$1"
+
+	# is this route intended for the
+	# $INTERFACE of this hotplug event
+	config_get interface "$config" interface
+	[ "$interface" != "$INTERFACE" ] && return 0
+	
+	# get the real interface name from network config
+	config_get dev "$interface" ifname
+
+	config_get target "$config" target
+	config_get gateway "$config" gateway
+	config_get metric "$config" metric
+	config_get mtu "$config" mtu
+
+	# make sure there is a gateway and a target
+	[ -n "$target" ] || {
+		echo "Missing target in route section $config"
+		return 1
+	}
+	[ -n "$gateway" ] || {
+		config_get gateway "$interface" gateway
+	}
+
+	/sbin/route -A inet6 add $target ${gateway:+gw "$gateway"} \
+		${dev:+dev "$dev"} ${metric:+ metric "$metric"} \
+		${mtu:+mss "$mtu"}
+}
+
+# Skip fake devices (e.g. relayd)
+grep -qs "^ *$DEVICE:" /proc/net/dev || exit 0
+
+case "$ACTION" in
+	ifup)
+		include /lib/network
+		scan_interfaces
+
+		# Setup aliases
+		config_set "$INTERFACE" aliases ""
+		config_set "$INTERFACE" alias_count 0
+		config_foreach setup_interface_alias alias "$INTERFACE" "$DEVICE"
+
+		# Save alias references in state vars
+		local aliases
+		config_get aliases "$INTERFACE" aliases
+		[ -z "$aliases" ] || uci_toggle_state network "$INTERFACE" aliases "$aliases"
+
+		# Make ip6addr of parent iface the main address again
+		local ip6addr
+		config_get ip6addr "$INTERFACE" ip6addr
+		[ -z "$ip6addr" ] || {
+			ifconfig "$DEVICE" del "$ip6addr"
+			ifconfig "$DEVICE" add "$ip6addr"
+		}
+		
+		# Setup sysctls
+		local proto accept_ra send_rs
+		
+		config_get proto "$INTERFACE" proto
+		if [ "$proto" = dhcp ]; then
+			accept_ra=1
+			send_rs=0
+		else
+			accept_ra=0
+			send_rs=1
+		fi
+
+		config_get_bool accept_ra "$INTERFACE" accept_ra $accept_ra
+		[ $accept_ra -eq 0 ] || {
+			logger -t ifup "Allowing Router Advertisements on $INTERFACE ($DEVICE)"
+			accept_ra=2
+		}
+		do_sysctl "net.ipv6.conf.$DEVICE.accept_ra" $accept_ra
+
+		config_get_bool send_rs "$INTERFACE" send_rs $send_rs
+		[ $send_rs -eq 0 ] || {
+			logger -t ifup "Enabling Router Solicitations on $INTERFACE ($DEVICE)"
+			send_rs=2
+		}
+		do_sysctl "net.ipv6.conf.$DEVICE.forwarding" $send_rs
+
+
+		# Setup routes
+		config_foreach "add_route" route
+		config_foreach "add_route6" route6
+	;;
+	ifdown)
+		# Bring down named aliases
+		local device=$(uci_get_state network "$INTERFACE" device)
+		local ifn
+		for ifn in $(ifconfig | sed -ne "s/^\(\($DEVICE${device:+\|$device}\|br-$INTERFACE\):[^[:space:]]\+\).*/\1/p"); do
+			ifconfig "$ifn" down
+		done
+	;;
+esac
+
diff --git a/package/base-files-network/files/etc/hotplug.d/net/10-net b/package/base-files-network/files/etc/hotplug.d/net/10-net
new file mode 100644
index 000000000..013ece39c
--- /dev/null
+++ b/package/base-files-network/files/etc/hotplug.d/net/10-net
@@ -0,0 +1,72 @@
+# Copyright (C) 2006 OpenWrt.org
+
+include /lib/network
+
+addif() {
+	# Ensure that ipv6 is loaded, autoloading happens later but ipv6 might be
+	# required now for interface setup.
+	[ -d /proc/sys/net/ipv6 ] || {
+		grep -q '^ipv6' /etc/modules.d/* && insmod ipv6
+	}
+
+	# PPP devices are configured by pppd, no need to run setup_interface here
+	case "$INTERFACE" in
+		3g-*|ppp-*|pppoa-*|pppoe-*|pptp-*) return 0;;
+	esac
+
+	scan_interfaces
+	local cfg="$(find_config "$INTERFACE")"
+
+	case "$INTERFACE" in
+		# Skip wireless parent interfaces
+		ath[0-9]|wlan[0-9]) ;;
+		*)
+			# check the autoload setting
+			config_get auto "$cfg" auto
+			case "$auto" in
+				1|on|enabled) setup_interface "$INTERFACE";;
+			esac
+		;;
+	esac
+
+	# find all vlan configurations for this interface and set them up as well
+	for ifc in $interfaces; do
+		config_get iftype "$ifc" type
+		config_get ifs "$ifc" device
+		for dev in $ifs; do
+			[ "${dev%%\.*}" = "$INTERFACE" -a "$dev" != "$INTERFACE" ] && {
+				add_vlan "$dev"
+			}
+		done
+	done
+}
+
+
+delif() {
+	scan_interfaces
+
+	# find all vlan configurations for this interface and nuke 'em
+	for ifc in $interfaces; do
+		config_get iftype "$ifc" type
+		config_get ifs "$ifc" device
+		confdevs="$(uci_get network.$ifc.ifname)"
+		for dev in $ifs; do
+			[ "${dev%%\.*}" = "$INTERFACE" ] && {
+				list_contains confdevs "$dev" || list_remove ifs "$dev"
+			}
+		done
+		uci_set_state "network" "$ifc" device "$ifs"
+	done
+}
+
+case "$ACTION" in
+	add|register)
+		case "$PHYSDEVDRIVER" in
+			natsemi) sleep 1;;
+		esac
+		addif
+	;;
+	remove|unregister)
+		delif
+	;;
+esac
diff --git a/package/base-files-network/files/etc/init.d/network b/package/base-files-network/files/etc/init.d/network
new file mode 100755
index 000000000..fc512216f
--- /dev/null
+++ b/package/base-files-network/files/etc/init.d/network
@@ -0,0 +1,52 @@
+#!/bin/sh /etc/rc.common
+# Copyright (C) 2006-2011 OpenWrt.org
+
+START=40
+STOP=90
+
+boot() {
+	setup_switch() { return 0; }
+
+	include /lib/network
+	setup_switch
+
+	/sbin/wifi detect > /tmp/wireless.tmp
+	[ -s /tmp/wireless.tmp ] && {
+		cat /tmp/wireless.tmp >> /etc/config/wireless
+	}
+	rm -f /tmp/wireless.tmp
+	grep -qs config /etc/config/wireless && {
+		/sbin/wifi up
+	}
+
+	scan_interfaces
+
+	local ifc
+	for ifc in $interfaces; do
+		local proto
+		config_get proto "$ifc" proto
+
+		local auto
+		config_get_bool auto "$ifc" auto 1
+
+		type "coldplug_interface_$proto" >/dev/null && [ "$auto" = 1 ] && \
+			coldplug_interface_$proto "$ifc"
+	done
+}
+
+start() {
+	setup_switch() { return 0; }
+	
+	include /lib/network
+	setup_switch
+	ifup -a
+	/sbin/wifi up
+}
+
+stop() {
+	ifdown -a
+}
+
+restart() {
+	start
+}
diff --git a/package/base-files-network/files/lib/network/config.sh b/package/base-files-network/files/lib/network/config.sh
new file mode 100755
index 000000000..29d021af9
--- /dev/null
+++ b/package/base-files-network/files/lib/network/config.sh
@@ -0,0 +1,444 @@
+#!/bin/sh
+# Copyright (C) 2006 OpenWrt.org
+
+# DEBUG="echo"
+
+do_sysctl() {
+	[ -n "$2" ] && \
+		sysctl -n -e -w "$1=$2" >/dev/null || \
+		sysctl -n -e "$1"
+}
+
+map_sysctls() {
+	local cfg="$1"
+	local ifn="$2"
+
+	local fam
+	for fam in ipv4 ipv6; do
+		if [ -d /proc/sys/net/$fam ]; then
+			local key
+			for key in /proc/sys/net/$fam/*/$ifn/*; do
+				local val
+				config_get val "$cfg" "${fam}_${key##*/}"
+				[ -n "$val" ] && echo -n "$val" > "$key"
+			done
+		fi
+	done
+}
+
+find_config() {
+	local iftype device iface ifaces ifn
+	for ifn in $interfaces; do
+		config_get iftype "$ifn" type
+		config_get iface "$ifn" ifname
+		case "$iftype" in
+			bridge) config_get ifaces "$ifn" ifnames;;
+		esac
+		config_get device "$ifn" device
+		for ifc in $device $iface $ifaces; do
+			[ ."$ifc" = ."$1" ] && {
+				echo "$ifn"
+				return 0
+			}
+		done
+	done
+
+	return 1;
+}
+
+scan_interfaces() {
+	local cfgfile="${1:-network}"
+	interfaces=
+	config_cb() {
+		case "$1" in
+			interface)
+				config_set "$2" auto 1
+			;;
+		esac
+		local iftype ifname device proto
+		config_get iftype "$CONFIG_SECTION" TYPE
+		case "$iftype" in
+			interface)
+				append interfaces "$CONFIG_SECTION"
+				config_get proto "$CONFIG_SECTION" proto
+				config_get iftype "$CONFIG_SECTION" type
+				config_get ifname "$CONFIG_SECTION" ifname
+				config_get device "$CONFIG_SECTION" device "$ifname"
+				config_set "$CONFIG_SECTION" device "$device"
+				case "$iftype" in
+					bridge)
+						config_set "$CONFIG_SECTION" ifnames "$device"
+						config_set "$CONFIG_SECTION" ifname br-"$CONFIG_SECTION"
+					;;
+				esac
+				( type "scan_$proto" ) >/dev/null 2>/dev/null && eval "scan_$proto '$CONFIG_SECTION'"
+			;;
+		esac
+	}
+	config_load "${cfgfile}"
+}
+
+add_vlan() {
+	local vif="${1%\.*}"
+
+	[ "$1" = "$vif" ] || ifconfig "$1" >/dev/null 2>/dev/null || {
+		ifconfig "$vif" up 2>/dev/null >/dev/null || add_vlan "$vif"
+		$DEBUG vconfig add "$vif" "${1##*\.}"
+		return 0
+	}
+	return 1
+}
+
+# add dns entries if they are not in resolv.conf yet
+add_dns() {
+	local cfg="$1"; shift
+
+	remove_dns "$cfg"
+
+	# We may be called by pppd's ip-up which has a nonstandard umask set.
+	# Create an empty file here and force its permission to 0644, otherwise
+	# dnsmasq will not be able to re-read the resolv.conf.auto .
+	[ ! -f /tmp/resolv.conf.auto ] && {
+		touch /tmp/resolv.conf.auto
+		chmod 0644 /tmp/resolv.conf.auto
+	}
+
+	local dns
+	local add
+	for dns in "$@"; do
+		grep -qsE "^nameserver ${dns//./\\.}$" /tmp/resolv.conf.auto || {
+			add="${add:+$add }$dns"
+			echo "nameserver $dns" >> /tmp/resolv.conf.auto
+		}
+	done
+
+	[ -n "$cfg" ] && {
+		uci_toggle_state network "$cfg" dns "$add"
+		uci_toggle_state network "$cfg" resolv_dns "$add"
+	}
+}
+
+# remove dns entries of the given iface
+remove_dns() {
+	local cfg="$1"
+
+	[ -n "$cfg" ] && {
+		[ -f /tmp/resolv.conf.auto ] && {
+			local dns=$(uci_get_state network "$cfg" resolv_dns)
+			for dns in $dns; do
+				sed -i -e "/^nameserver ${dns//./\\.}$/d" /tmp/resolv.conf.auto
+			done
+		}
+
+		uci_revert_state network "$cfg" dns
+		uci_revert_state network "$cfg" resolv_dns
+	}
+}
+
+# sort the device list, drop duplicates
+sort_list() {
+	local arg="$*"
+	(
+		for item in $arg; do
+			echo "$item"
+		done
+	) | sort -u
+}
+
+# Create the interface, if necessary.
+# Return status 0 indicates that the setup_interface() call should continue
+# Return status 1 means that everything is set up already.
+
+prepare_interface() {
+	local iface="$1"
+	local config="$2"
+	local macaddr="$3"
+
+	# if we're called for the bridge interface itself, don't bother trying
+	# to create any interfaces here. The scripts have already done that, otherwise
+	# the bridge interface wouldn't exist.
+	[ "br-$config" = "$iface" -o -e "$iface" ] && return 0;
+
+	ifconfig "$iface" 2>/dev/null >/dev/null && {
+		local proto
+		config_get proto "$config" proto
+
+		# make sure the interface is removed from any existing bridge and deconfigured,
+		# (deconfigured only if the interface is not set to proto=none)
+		unbridge "$iface"
+
+		local mtu macaddr txqueuelen
+		config_get mtu "$config" mtu
+		[ -n "$macaddr" ] || config_get macaddr "$config" macaddr
+		config_get txqueuelen "$config" txqueuelen
+		[ -n "$macaddr" ] && $DEBUG ifconfig "$iface" down
+		$DEBUG ifconfig "$iface" ${macaddr:+hw ether "$macaddr"} ${mtu:+mtu $mtu} ${txqueuelen:+txqueuelen $txqueuelen} up
+
+		[ "$proto" = none ] || ifconfig "$iface" 0.0.0.0
+
+		# Apply sysctl settings
+		map_sysctls "$config" "$iface"
+	}
+
+	# Setup VLAN interfaces
+	add_vlan "$iface" && return 1
+	ifconfig "$iface" 2>/dev/null >/dev/null || return 0
+
+	# Setup bridging
+	local iftype
+	config_get iftype "$config" type
+	case "$iftype" in
+		bridge)
+			local macaddr
+			config_get macaddr "$config" macaddr
+			[ -x /usr/sbin/brctl ] && {
+				ifconfig "br-$config" 2>/dev/null >/dev/null && {
+					local newdevs devices
+					config_get devices "$config" device
+					for dev in $(sort_list "$devices" "$iface"); do
+						append newdevs "$dev"
+					done
+					uci_toggle_state network "$config" device "$newdevs"
+					$DEBUG ifconfig "$iface" 0.0.0.0
+					$DEBUG do_sysctl "net.ipv6.conf.$iface.disable_ipv6" 1
+					$DEBUG brctl addif "br-$config" "$iface"
+					# Bridge existed already. No further processing necesary
+				} || {
+					local stp igmp_snooping
+					config_get_bool stp "$config" stp 0
+					config_get_bool igmp_snooping "$config" igmp_snooping 1
+					$DEBUG brctl addbr "br-$config"
+					$DEBUG brctl setfd "br-$config" 0
+					$DEBUG ifconfig "$iface" 0.0.0.0
+					$DEBUG do_sysctl "net.ipv6.conf.$iface.disable_ipv6" 1
+					$DEBUG brctl addif "br-$config" "$iface"
+					$DEBUG brctl stp "br-$config" $stp
+					[ -z "$macaddr" ] && macaddr="$(cat /sys/class/net/$iface/address)"
+					echo $igmp_snooping > /sys/devices/virtual/net/br-$config/bridge/multicast_snooping 2>/dev/null
+					$DEBUG ifconfig "br-$config" hw ether $macaddr up
+					# Creating the bridge here will have triggered a hotplug event, which will
+					# result in another setup_interface() call, so we simply stop processing
+					# the current event at this point.
+				}
+				ifconfig "$iface" ${macaddr:+hw ether "${macaddr}"} up 2>/dev/null >/dev/null
+				return 1
+			}
+		;;
+	esac
+	return 0
+}
+
+set_interface_ifname() {
+	local config="$1"
+	local ifname="$2"
+
+	local device
+	config_get device "$1" device
+	uci_toggle_state network "$config" ifname "$ifname"
+	uci_toggle_state network "$config" device "$device"
+}
+
+setup_interface_none() {
+	env -i ACTION="ifup" INTERFACE="$2" DEVICE="$1" PROTO=none /sbin/hotplug-call "iface" &
+}
+
+setup_interface_static() {
+	local iface="$1"
+	local config="$2"
+
+	local ipaddr netmask ip6addr
+	config_get ipaddr "$config" ipaddr
+	config_get netmask "$config" netmask
+	config_get ip6addr "$config" ip6addr
+	[ -z "$ipaddr" -o -z "$netmask" ] && [ -z "$ip6addr" ] && return 1
+
+	local gateway ip6gw dns bcast metric
+	config_get gateway "$config" gateway
+	config_get ip6gw "$config" ip6gw
+	config_get dns "$config" dns
+	config_get bcast "$config" broadcast
+	config_get metric "$config" metric
+
+	case "$ip6addr" in
+		*/*) ;;
+		*:*) ip6addr="$ip6addr/64" ;;
+	esac
+
+	[ -z "$ipaddr" ] || $DEBUG ifconfig "$iface" "$ipaddr" netmask "$netmask" broadcast "${bcast:-+}"
+	[ -z "$ip6addr" ] || $DEBUG ifconfig "${iface%:*}" add "$ip6addr"
+	[ -z "$gateway" ] || $DEBUG route add default gw "$gateway" ${metric:+metric $metric} dev "$iface"
+	[ -z "$ip6gw" ] || $DEBUG route -A inet6 add default gw "$ip6gw" ${metric:+metric $metric} dev "${iface%:*}"
+	[ -z "$dns" ] || add_dns "$config" $dns
+
+	config_get type "$config" TYPE
+	[ "$type" = "alias" ] && return 0
+
+	env -i ACTION="ifup" INTERFACE="$config" DEVICE="$iface" PROTO=static /sbin/hotplug-call "iface" &
+}
+
+setup_interface_alias() {
+	local config="$1"
+	local parent="$2"
+	local iface="$3"
+
+	local cfg
+	config_get cfg "$config" interface
+	[ "$parent" == "$cfg" ] || return 0
+
+	# parent device and ifname
+	local p_device p_type
+	config_get p_device "$cfg" device
+	config_get p_type   "$cfg" type
+
+	# select alias ifname
+	local layer use_iface
+	config_get layer "$config" layer 2
+	case "$layer:$p_type" in
+		# layer 3: e.g. pppoe-wan or pptp-vpn
+		3:*)      use_iface="$iface" ;;
+
+		# layer 2 and parent is bridge: e.g. br-wan
+		2:bridge) use_iface="br-$cfg" ;;
+
+		# layer 1: e.g. eth0 or ath0
+		*)        use_iface="$p_device" ;;
+	esac
+
+	# alias counter
+	local ctr
+	config_get ctr "$parent" alias_count 0
+	ctr="$(($ctr + 1))"
+	config_set "$parent" alias_count "$ctr"
+
+	# alias list
+	local list
+	config_get list "$parent" aliases
+	append list "$config"
+	config_set "$parent" aliases "$list"
+
+	use_iface="$use_iface:$ctr"
+	set_interface_ifname "$config" "$use_iface"
+
+	local proto
+	config_get proto "$config" proto "static"
+	case "${proto}" in
+		static)
+			setup_interface_static "$use_iface" "$config"
+		;;
+		*)
+			echo "Unsupported type '$proto' for alias config '$config'"
+			return 1
+		;;
+	esac
+}
+
+setup_interface() {
+	local iface="$1"
+	local config="$2"
+	local proto="$3"
+	local vifmac="$4"
+
+	[ -n "$config" ] || {
+		config=$(find_config "$iface")
+		[ "$?" = 0 ] || return 1
+	}
+
+	prepare_interface "$iface" "$config" "$vifmac" || return 0
+
+	[ "$iface" = "br-$config" ] && {
+		# need to bring up the bridge and wait a second for
+		# it to switch to the 'forwarding' state, otherwise
+		# it will lose its routes...
+		ifconfig "$iface" up
+		sleep 1
+	}
+
+	# Interface settings
+	set_interface_ifname "$config" "$iface"
+
+	[ -n "$proto" ] || config_get proto "$config" proto
+	case "$proto" in
+		static)
+			setup_interface_static "$iface" "$config"
+		;;
+		dhcp)
+			# kill running udhcpc instance
+			local pidfile="/var/run/dhcp-${iface}.pid"
+			service_kill udhcpc "$pidfile"
+
+			local ipaddr netmask hostname proto1 clientid vendorid broadcast reqopts
+			config_get ipaddr "$config" ipaddr
+			config_get netmask "$config" netmask
+			config_get hostname "$config" hostname
+			config_get proto1 "$config" proto
+			config_get clientid "$config" clientid
+			config_get vendorid "$config" vendorid
+			config_get_bool broadcast "$config" broadcast 0
+			config_get reqopts "$config" reqopts
+
+			[ -z "$ipaddr" ] || \
+				$DEBUG ifconfig "$iface" "$ipaddr" ${netmask:+netmask "$netmask"}
+
+			# additional request options
+			local opt dhcpopts
+			for opt in $reqopts; do
+				append dhcpopts "-O $opt"
+			done
+
+			# don't stay running in background if dhcp is not the main proto on the interface (e.g. when using pptp)
+			[ "$proto1" != "$proto" ] && append dhcpopts "-n -q" || append dhcpopts "-O rootpath -R &"
+			[ "$broadcast" = 1 ] && broadcast="-O broadcast" || broadcast=
+
+			$DEBUG eval udhcpc -t 0 -i "$iface" \
+				${ipaddr:+-r $ipaddr} \
+				${hostname:+-H $hostname} \
+				${clientid:+-c $clientid} \
+				${vendorid:+-V $vendorid} \
+				-b -p "$pidfile" $broadcast \
+				${dhcpopts}
+		;;
+		none)
+			setup_interface_none "$iface" "$config"
+		;;
+		*)
+			if ( eval "type setup_interface_$proto" ) >/dev/null 2>/dev/null; then
+				eval "setup_interface_$proto '$iface' '$config' '$proto'"
+			else
+				echo "Interface type $proto not supported."
+				return 1
+			fi
+		;;
+	esac
+}
+
+stop_interface_dhcp() {
+	local config="$1"
+
+	local ifname
+	config_get ifname "$config" ifname
+
+	local lock="/var/lock/dhcp-${ifname}"
+	[ -f "$lock" ] && lock -u "$lock"
+
+	remove_dns "$config"
+
+	local pidfile="/var/run/dhcp-${ifname}.pid"
+	service_kill udhcpc "$pidfile"
+
+	uci -P /var/state revert "network.$config"
+}
+
+unbridge() {
+	local dev="$1"
+	local brdev
+
+	[ -x /usr/sbin/brctl ] || return 0
+	brctl show 2>/dev/null | grep "$dev" >/dev/null && {
+		# interface is still part of a bridge, correct that
+
+		for brdev in $(brctl show | awk '$2 ~ /^[0-9].*\./ { print $1 }'); do
+			brctl delif "$brdev" "$dev" 2>/dev/null >/dev/null
+			do_sysctl "net.ipv6.conf.$dev.disable_ipv6" 0
+		done
+	}
+}
diff --git a/package/base-files-network/files/sbin/ifdown b/package/base-files-network/files/sbin/ifdown
new file mode 100755
index 000000000..1455a9de7
--- /dev/null
+++ b/package/base-files-network/files/sbin/ifdown
@@ -0,0 +1,57 @@
+#!/bin/sh
+# Copyright (C) 2006-2011 OpenWrt.org
+
+. /etc/functions.sh
+[ $# = 0 ] && { echo "  $0 <group>"; exit; }
+
+case "$1" in
+	"-a")
+		[ -e "/tmp/resolv.conf.auto" ] && rm /tmp/resolv.conf.auto
+		config_cb() {
+			[ interface != "$1" -o -z "$2" ] || eval "$0 -w $2"
+		}
+		config_load network
+		exit 0
+	;;
+	"-w") shift ;;
+esac
+
+include /lib/network
+scan_interfaces
+
+cfg=$1
+debug "### ifdown $cfg ###"
+
+config_get proto "$cfg" proto
+[ -z "$proto" ] && { echo "interface not found."; exit; }
+
+config_get iface "$cfg" device
+[ "static" = "$proto" -o "none" = "$proto" ] && {
+	env -i ACTION="ifdown" INTERFACE="$cfg" DEVICE="$iface" PROTO="$proto" /sbin/hotplug-call "iface"
+}
+
+# call interface stop handler
+( type "stop_interface_$proto" ) >/dev/null 2>/dev/null && eval "stop_interface_$proto '$cfg'"
+
+config_get ifname "$cfg" ifname
+config_get device "$cfg" device
+
+[ ."$device" != ."$ifname" ] || device=
+for dev in $ifname $device; do
+	ifconfig "$dev" 0.0.0.0 down >/dev/null 2>/dev/null
+done
+
+config_get iftype "$cfg" type
+[ "bridge" = "$iftype" ] && brctl delbr "$ifname" >/dev/null 2>/dev/null
+
+# remove the interface's dns entries
+remove_dns "$cfg"
+
+# remove the interface's network state
+uci_revert_state network "$1"
+
+# revert aliases state as well
+config_get aliases "$1" aliases
+for config in $aliases; do
+	uci_revert_state network "$config"
+done
diff --git a/package/base-files-network/files/sbin/ifup b/package/base-files-network/files/sbin/ifup
new file mode 100755
index 000000000..5f8d80dc2
--- /dev/null
+++ b/package/base-files-network/files/sbin/ifup
@@ -0,0 +1,51 @@
+#!/bin/sh
+# Copyright (C) 2006-2011 OpenWrt.org
+
+/sbin/ifdown "$@"
+
+. /etc/functions.sh
+[ $# = 0 ] && { echo "  $0 <group>"; exit; }
+
+setup_wifi=1
+
+case "$1" in
+	"-a")
+		[ -e "/tmp/resolv.conf.auto" ] && rm /tmp/resolv.conf.auto
+		config_cb() {
+			[ interface != "$1" -o -z "$2" ] || eval "$0 -w $2"
+		}
+		config_load network
+		exit 0
+	;;
+	"-w") setup_wifi=0; shift ;;
+esac
+
+if [ $setup_wifi -gt 0 ] && grep -q config /etc/config/wireless; then
+	find_related_radios() {
+		local wdev wnet
+		config_get wdev "$1" device
+		config_get wnet "$1" network
+
+		if [ -n "$wdev" ] && [ "$wnet" = "$network" ]; then
+			append radio_devs "$wdev" "$N"
+		fi
+	}
+
+	local radio_devs
+	local network="$1"
+	config_load wireless
+	config_foreach find_related_radios wifi-iface
+
+	local dev
+	for dev in $(echo "$radio_devs" | sort -u); do
+		/sbin/wifi up "$dev"
+	done
+fi
+
+include /lib/network
+scan_interfaces
+
+config_get ifname "$1" device
+for dev in ${ifname:-$1}; do
+	setup_interface "$dev" "$1"
+done
diff --git a/package/base-files-network/files/usr/share/udhcpc/default.script b/package/base-files-network/files/usr/share/udhcpc/default.script
new file mode 100755
index 000000000..8dbff4747
--- /dev/null
+++ b/package/base-files-network/files/usr/share/udhcpc/default.script
@@ -0,0 +1,161 @@
+#!/bin/sh
+[ -z "$1" ] && echo "Error: should be run by udhcpc" && exit 1
+
+. /etc/functions.sh
+include /lib/network
+RESOLV_CONF="/tmp/resolv.conf.auto"
+
+change_state () {
+	[ -n "$ifc" ] || return
+	uci_revert_state "$1" "$2" "$3" "$4"
+	uci_set_state "$1" "$2" "$3" "$4"
+}
+
+set_classless_routes() {
+	local max=128
+	local type
+	while [ -n "$1" -a -n "$2" -a $max -gt 0 ]; do
+		[ ${1##*/} -eq 32 ] && type=host || type=net
+		echo "udhcpc: adding route for $type $1 via $2"
+		route add -$type "$1" gw "$2" dev "$interface"
+		max=$(($max-1))
+		shift 2
+	done
+}
+
+setup_interface () {
+	local old_ip
+	local old_broadcast
+	local old_subnet
+	local old_router
+	local old_dns
+	local user_dns
+	local user_router
+	local user_metric
+
+	[ -n "$ifc" ] && {
+		old_ip="$(uci_get_state network "$ifc" ipaddr)"
+		old_broadcast="$(uci_get_state network "$ifc" broadcast)"
+		old_subnet="$(uci_get_state network "$ifc" netmask)"
+	}
+
+	[ "$ip" != "$old_ip" ] \
+	|| [ "${broadcast:-+}" != "$old_broadcast" ] \
+	|| [ "${subnet:-255.255.255.0}" != "$old_subnet" ] && {
+		echo "udhcpc: ifconfig $interface $ip netmask ${subnet:-255.255.255.0} broadcast ${broadcast:-+}"
+		ifconfig $interface $ip netmask ${subnet:-255.255.255.0} broadcast ${broadcast:-+}
+
+		change_state network "$ifc" ipaddr "$ip"
+		change_state network "$ifc" broadcast "${broadcast:-+}"
+		change_state network "$ifc" netmask "${subnet:-255.255.255.0}"
+	}
+
+
+	# Default Route
+	[ -n "$ifc" ] && {
+		change_state network "$ifc" lease_gateway "$router"
+		old_router="$(uci_get_state network "$ifc" gateway)"
+		user_router="$(uci_get network "$ifc" gateway)"
+		user_metric="$(uci_get network "$ifc" metric)"
+		[ -n "$user_router" ] && router="$user_router"
+	}
+
+	[ -n "$router" ] && [ "$router" != "0.0.0.0" ] && [ "$router" != "255.255.255.255" ] && [ "$router" != "$old_router" ] && {
+		echo "udhcpc: setting default routers: $router"
+
+		local valid_gw=""
+		for i in $router ; do
+			route add default gw $i ${user_metric:+metric $user_metric} dev $interface
+			valid_gw="${valid_gw:+$valid_gw|}$i"
+		done
+		
+		eval $(route -n | awk '
+			/^0.0.0.0\W{9}('$valid_gw')\W/ {next}
+			/^0.0.0.0/ {print "route del -net "$1" gw "$2";"}
+		')
+
+		change_state network "$ifc" gateway "$router"
+	}
+
+	# CIDR STATIC ROUTES (rfc3442)
+	[ -n "$staticroutes" ] && set_classless_routes $staticroutes
+	[ -n "$msstaticroutes" ] && set_classless_routes $msstaticroutes
+
+	# DNS
+	old_dns=$(uci_get_state network "$ifc" dns)
+	old_domain=$(uci_get_state network "$ifc" dnsdomain)
+	user_dns=$(uci_get "network.$ifc.dns")
+	[ -n "$user_dns" ] && dns="$user_dns"
+
+	[ -n "$dns" ] && [ "$dns" != "$old_dns" -o -n "$user_dns" ] && {
+		echo "udhcpc: setting dns servers: $dns"
+		add_dns "$ifc" $dns
+
+		[ -n "$domain" ] && [ "$domain" != "$old_domain" ] && {
+			echo "udhcpc: setting dns domain: $domain"
+			sed -i -e "${old_domain:+/^search $old_domain$/d; }/^search $domain$/d" "${RESOLV_CONF}"
+			echo "search $domain" >> "${RESOLV_CONF}"
+			change_state network "$ifc" dnsdomain "$domain"
+		}
+	}
+
+	[ -n "$ifc" ] || return
+
+	# UCI State
+	change_state network "$ifc" lease_server "$serverid"
+	change_state network "$ifc" lease_acquired "$(sed -ne 's![^0-9].*$!!p' /proc/uptime)"
+	change_state network "$ifc" lease_lifetime "$lease"
+	[ -n "$ntpsrv" ] && 	change_state network "$ifc" lease_ntpsrv "$ntpsrv"
+	[ -n "$timesvr" ] && 	change_state network "$ifc" lease_timesrv "$timesvr"
+	[ -n "$hostname" ] &&	change_state network "$ifc" lease_hostname "$hostname"
+	[ -n "$timezone" ] && 	change_state network "$ifc" lease_timezone "$timezone"
+
+
+	# Hotplug
+	env -i ACTION="$1" INTERFACE="$ifc" DEVICE="$ifname" PROTO=dhcp /sbin/hotplug-call iface
+}
+
+
+scan_interfaces
+applied=
+for ifc in $interfaces __default; do
+	if [ "$ifc" = __default ]; then
+		ifc=""
+		[ -n "$applied" ] && continue
+	else
+		config_get ifname "$ifc" ifname
+		[ "$ifname" = "$interface" ] || continue
+
+		config_get proto "$ifc" proto
+		[ "$proto" = "dhcp" ] || continue
+		applied=true
+	fi
+
+	case "$1" in
+		deconfig)
+			ifconfig "$interface" 0.0.0.0
+			[ -n "$ifc" ] && {
+				env -i ACTION="ifdown" INTERFACE="$ifc" DEVICE="$ifname" PROTO=dhcp /sbin/hotplug-call iface
+			
+				config_get device "$ifc" device
+				config_get ifname "$ifc" ifname
+				config_get aliases "$ifc" aliases
+				uci_revert_state network "$ifc"
+				[ -n "$device" ] && uci_set_state network "$ifc" device "$device"
+				[ -n "$ifname" ] && uci_set_state network "$ifc" ifname "$ifname"
+				[ -n "$aliases" ] && uci_set_state network "$ifc" aliases "$aliases"
+			}
+		;;
+		renew)
+			setup_interface update
+		;;
+		bound)
+			setup_interface ifup
+		;;
+	esac
+done
+
+# user rules
+[ -f /etc/udhcpc.user ] && . /etc/udhcpc.user
+
+exit 0