ipv6-support: Switch to native IPv6 support

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@35174 3c298f89-4303-0410-b956-a3cf2f4a3e73

8 files changed, 14 insertions, 719 deletions

diff --git a/package/network/ipv6/ipv6-support/Makefile b/package/network/ipv6/ipv6-support/Makefile
index 74286e79b..d3b397403 100644
--- a/package/network/ipv6/ipv6-support/Makefile
+++ b/package/network/ipv6/ipv6-support/Makefile
@@ -8,7 +8,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=ipv6-support
-PKG_VERSION:=2013-01-13
+PKG_VERSION:=2013-01-15
 PKG_RELEASE:=1
 
 include $(INCLUDE_DIR)/package.mk
@@ -16,7 +16,7 @@ include $(INCLUDE_DIR)/package.mk
 define Package/ipv6-support
   SECTION:=ipv6
   CATEGORY:=IPv6
-  DEPENDS:=+kmod-ipv6 +6relayd +odhcp6c +6distributed +ip6tables +ubus
+  DEPENDS:=+kmod-ipv6 +6relayd +odhcp6c +ip6tables
   TITLE:=Basic IPv6-support for Customer Edge Routers
   MAINTAINER:=Steven Barth <steven@midlink.org>
   PKGARCH:=all
@@ -33,21 +33,9 @@ endef
 define Build/Configure
 endef
 
-define Package/ipv6-support/conffiles
-/etc/config/network6
-endef
-
 define Package/ipv6-support/install
-	$(INSTALL_DIR) $(1)/etc/hotplug.d/iface
-	$(INSTALL_DATA) ./files/ipv6.hotplug $(1)/etc/hotplug.d/iface/20-ipv6
-	$(INSTALL_DIR) $(1)/lib/ipv6
-	$(INSTALL_DATA) ./files/support.sh $(1)/lib/ipv6/support.sh
-	$(INSTALL_BIN) ./files/dhcpv6.sh $(1)/lib/ipv6/dhcpv6.sh
-	$(INSTALL_BIN) ./files/firewall.sh $(1)/lib/ipv6/firewall.sh
-	$(INSTALL_DIR) $(1)/etc/config
-	$(INSTALL_DATA) ./files/network6.config $(1)/etc/config/network6
 	$(INSTALL_DIR) $(1)/etc/uci-defaults
-	$(INSTALL_BIN) ./files/ipv6-support.defaults $(1)/etc/uci-defaults/ipv6-support.defaults
+	$(INSTALL_BIN) ./files/enable-ipv6.defaults $(1)/etc/uci-defaults/enable-ipv6
 endef
 
 $(eval $(call BuildPackage,ipv6-support))
diff --git a/package/network/ipv6/ipv6-support/files/dhcpv6.sh b/package/network/ipv6/ipv6-support/files/dhcpv6.sh
deleted file mode 100755
index 5a668cd9b..000000000
--- a/package/network/ipv6/ipv6-support/files/dhcpv6.sh
+++ /dev/null
@@ -1,73 +0,0 @@
-#!/bin/sh
-# Copyright (c) 2012 OpenWrt.org
-. /lib/ipv6/support.sh
-. /lib/netifd/netifd-proto.sh
-
-local device="$1"
-local state="$2"
-local network=""
-
-resolve_network network "$device"
-
-# Unknown network
-[ -z "$network" ] && exit 0
-
-if [ "$state" == "started" ]; then
-	# Start border
-	set_forward_border "$network" "$device" enable
-
-	# Configure device
-	conf_set "$device" accept_ra 2
-	conf_set "$device" forwarding 2
-
-	# Send RS on interface
-	[ -x /usr/sbin/6relayd ] && /usr/sbin/6relayd -s "$device"
-
-	exit 0
-elif [ "$state" == "stopped" ]; then
-	# Deconfigure device
-	conf_set "$device" accept_ra 1
-	conf_set "$device" forwarding 1
-
-	# Disable border
-	set_forward_border "$network" "$device" disable
-
-	exit 0
-fi
-
-# Announce prefixes
-for prefix in $PREFIXES; do
-	announce_prefix "$prefix" "$network" "$device"
-done
-
-for prefix in $PREFIXES_LOST; do
-	announce_prefix "$prefix" "$network" "$device" delprefix
-done
-
-
-# Enable relaying if requested and we didn't get a prefix, disable otherwise
-local fallback="stop"
-[ -z "$PREFIXES" -a "$state" != "unbound" ] && fallback="start"
-setup_prefix_fallback "$fallback" "$network" "$device"
-
-
-# Operations in case of success
-[ "$state" == "timeout" -o "$state" == "unbound" ] && exit 0
-
-# Handshake completed, disable forwarding border
-set_forward_border "$network" "$device" disable
-
-local peerdns
-config_get_bool peerdns "$network" peerdns 1
-[ "$peerdns" -eq "1" ] && {
-	proto_init_update "*" 1
-	proto_set_keep 1
-	for server in $RDNSS; do
-		proto_add_dns_server "$server"
-	done
-	for domain in $DOMAINS; do
-		proto_add_dns_search "$domain"
-	done
-	proto_send_update "$network"
-}
-
diff --git a/package/network/ipv6/ipv6-support/files/enable-ipv6.defaults b/package/network/ipv6/ipv6-support/files/enable-ipv6.defaults
new file mode 100644
index 000000000..c77914b53
--- /dev/null
+++ b/package/network/ipv6/ipv6-support/files/enable-ipv6.defaults
@@ -0,0 +1,11 @@
+#!/bin/sh
+uci -q batch <<-EOF >/dev/null
+	set network.globals=globals
+	set network.globals.ula_prefix=auto
+	set network.wan6=interface
+	set network.wan6.proto=dhcpv6
+	set network.wan6.ifname=@wan
+	set network.lan.ip6assign=64
+	set network.wan.ipv6=1
+	commit network
+EOF
diff --git a/package/network/ipv6/ipv6-support/files/firewall.sh b/package/network/ipv6/ipv6-support/files/firewall.sh
deleted file mode 100755
index 57fcd382e..000000000
--- a/package/network/ipv6/ipv6-support/files/firewall.sh
+++ /dev/null
@@ -1,9 +0,0 @@
-#!/bin/sh
-ip6tables -N ipv6-site-border
-ip6tables -A forwarding_rule -s fc00::/7 -j ipv6-site-border
-ip6tables -A forwarding_rule -d fc00::/7 -j ipv6-site-border
-
-mkdir -p /var/etc/ipv6-firewall.d
-for i in /var/etc/ipv6-firewall.d/*; do
-	[ -f "$i" ] && . "$i"
-done
diff --git a/package/network/ipv6/ipv6-support/files/ipv6-support.defaults b/package/network/ipv6/ipv6-support/files/ipv6-support.defaults
deleted file mode 100644
index 6a699a145..000000000
--- a/package/network/ipv6/ipv6-support/files/ipv6-support.defaults
+++ /dev/null
@@ -1,6 +0,0 @@
-#!/bin/sh
-uci -q batch <<-EOF >/dev/null
-	set firewall.ipv6_support=include
-	set firewall.ipv6_support.path=/lib/ipv6/firewall.sh
-	commit firewall
-EOF
diff --git a/package/network/ipv6/ipv6-support/files/ipv6.hotplug b/package/network/ipv6/ipv6-support/files/ipv6.hotplug
deleted file mode 100644
index 52cdf3bde..000000000
--- a/package/network/ipv6/ipv6-support/files/ipv6.hotplug
+++ /dev/null
@@ -1,13 +0,0 @@
-#!/bin/sh
-# Copyright (c) 2012 OpenWrt.org
-[ "$DEVICE" == "lo" ] && exit 0
-. /lib/ipv6/support.sh
-
-case "$ACTION" in
-	ifup)
-		enable_interface "$INTERFACE" "$DEVICE"
-	;;
-	ifdown)
-		disable_interface "$INTERFACE" "$DEVICE"
-	;;
-esac
diff --git a/package/network/ipv6/ipv6-support/files/network6.config b/package/network/ipv6/ipv6-support/files/network6.config
deleted file mode 100644
index 37a327f2b..000000000
--- a/package/network/ipv6/ipv6-support/files/network6.config
+++ /dev/null
@@ -1,15 +0,0 @@
-config global global
-	option ula_prefix	auto
-
-config interface wan
-	option mode		dhcpv6
-	option request_prefix	auto
-	option prefix_fallback	relay
-	option peerdns		1	
-	option site_border	1
-
-config interface lan
-	option mode		router
-	option advertise_prefix	64
-	option relay_master	wan
-
diff --git a/package/network/ipv6/ipv6-support/files/support.sh b/package/network/ipv6/ipv6-support/files/support.sh
deleted file mode 100644
index 8ae803cf1..000000000
--- a/package/network/ipv6/ipv6-support/files/support.sh
+++ /dev/null
@@ -1,588 +0,0 @@
-#!/bin/sh
-# Copyright (c) 2012 OpenWrt.org
-. /lib/functions.sh
-. /lib/functions/service.sh
-. /lib/functions/network.sh
-
-config_load network6
-local NAT="ip6tables -t nat"
-
-conf_get() {
-	local __return="$1"
-	local __device="$2"
-	local __option="$3"
-	local __value=$(cat "/proc/sys/net/ipv6/conf/$__device/$__option")
-	eval "$__return=$__value"
-}
-
-
-conf_set() {
-	local device="$1"
-	local option="$2"
-	local value="$3"
-	echo "$value" > "/proc/sys/net/ipv6/conf/$device/$option"
-}
-
-
-stop_service() {
-	local __exe="$1"
-	SERVICE_PID_FILE="$2"
-	local __return="$3"
-
-	service_check "$__exe" && {
-		service_stop "$__exe"
-		[ -n "$__return" ] && eval "$__return=1"
-	}
-	rm -f "$SERVICE_PID_FILE"
-}
-
-
-start_service() {
-	local cmd="$1"
-	local pidfile="$2"
-
-	SERVICE_DAEMONIZE=1
-	SERVICE_WRITE_PID=1
-	SERVICE_PID_FILE="$pidfile"
-	service_start $cmd
-}
-
-
-resolve_network_add() {
-	local __section="$1"
-	local __device="$2"
-	local __return="$3"
-	local __cdevice
-	network_get_device __cdevice "$__section"
-	[ "$__cdevice" != "$__device" ] && return
-	
-	eval "$__return"'="'"$__section"'"'
-}
-
-
-resolve_network() {
-	local __return="$1"
-	local __device="$2"
-	config_foreach resolve_network_add interface "$__device" "$__return"
-}
-
-
-setup_masquerading() {
-	local cmd="$1"
-	local chain="network6_masquerade_$2"
-	local device="$3"
-
-	$NAT -D POSTROUTING -j "$chain" 2>/dev/null && {
-		$NAT -F "$chain" 2>/dev/null
-		$NAT -X "$chain" 2>/dev/null
-	}
-
-	[ "$cmd" != "stop" ] && {
-		$NAT -N "$chain"
-		$NAT -A "$chain" -o "$device" -j MASQUERADE
-		$NAT -A POSTROUTING -j "$chain"
-	}
-}
-
-
-setup_npt_chain() {
-	local cmd="$1"
-	local network="$2"
-	local chain="network6_npt_$network"
-
-	[ "$cmd" != "start" ] && {
-		$NAT -D POSTROUTING -j "$chain" 2>/dev/null && {
-			$NAT -D PREROUTING -j "$chain" 2>/dev/null
-			$NAT -F "$chain" 2>/dev/null
-			$NAT -X "$chain" 2>/dev/null
-		}
-	}
-
-	[ "$cmd" != "stop" ] && {
-		$NAT -N "$chain" 2>/dev/null && {
-			$NAT -A PREROUTING -j "$chain"
-			$NAT -A POSTROUTING -j "$chain"
-		}
-	}
-}
-
-
-announce_prefix() {
-	local prefix="$1"
-	local network="$2"
-	local device="$3"
-	local cmd="$4"
-	local type="$5"
-
-	local addr=$(echo "$prefix" | cut -d/ -f1)
-	local rem=$(echo "$prefix" | cut -d/ -f2)
-	local length=$(echo "$rem" | cut -d, -f1)
-	local prefer=""
-	local valid=""
-
-	# If preferred / valid provided
-	[ "$rem" != "$length" ] && {
-		prefer=$(echo "$rem" | cut -d, -f2)
-		valid=$(echo "$rem" | cut -d, -f3)
-	}
-
-	# Get prefix configuration
-	local ula=""
-	local prefix_action=""
-	config_get ula global ula_prefix
-	config_get prefix_action "$network" prefix_action
-	[ -z "$prefix_action" ] && prefix_action="distribute"
-
-	# Always announce the ULA when doing NPT
-	[ "$prefix" == "$ula" -a "$prefix_action" == "npt" ] && prefix_action="distribute"
-
-	[ "$prefix_action" == "distribute" -o "$prefix_action" == "npt" ] && {
-		local msg='{"network": "'"$network"'", "prefix": "'"$addr"'", "length": '"$length"
-		[ -n "$valid" ] && msg="$msg"', "valid": '"$valid"', "preferred": '"$prefer"
-		[ -z "$cmd" ] && cmd=newprefix
-
-		[ "$prefix_action" == "npt" ] && msg="$msg"', "npt": 1'
-		[ "$type" == "secondary" ] && msg="$msg"', "secondary": 1'
-
-		# Detect MTU
-		local mtu
-		conf_get mtu "$device" mtu
-		msg="$msg"', "mtu": '"$mtu"
-
-		ubus call 6distributed "$cmd" "$msg}"
-	}
-
-	[ "$prefix_action" == "npt" ] && {
-		local chain="network6_npt_$network"
-		local ula_addr=$(echo "$ula" | cut -d/ -f1)
-		local ula_rem=$(echo "$ula" | cut -d/ -f2)
-		local ula_length=$(echo "$ula_rem" | cut -d, -f1)
-		local device=""
-
-		network_get_device device "$network"
-		[ "$length" -lt "$ula_length" ] && length="$ula_length"
-		[ "$cmd" == "delprefix" ] && cmd="-D $chain" || cmd="-A $chain"
-
-		local in="-i $device -d $addr/$length -j NETMAP --to $ula_addr/$ula_length"
-		local out="-o $device -s $ula_addr/$ula_length -j NETMAP --to $addr/$length"
-
-		setup_npt_chain start "$network"
-		$NAT $cmd $in
-		$NAT $cmd $out
-	}
-}
-
-
-disable_router() {
-	local network="$1"
-
-	# Notify the address distribution daemon
-	ubus call 6distributed deliface '{"network": "'"$network"'"}'
-
-
-	# Start RD & DHCPv6 service
-	local router_service
-	config_get router_service global router_service
-
-	if [ "$router_service" == "dnsmasq" ]; then
-		rm -f "/var/etc/dnsmasq.d/ipv6-router-$network.conf"
-		/etc/init.d/dnsmasq restart
-	else
-		stop_service /usr/sbin/6relayd "/var/run/ipv6-router-$network.pid"
-	fi
-}
-
-
-restart_relay_slave() {
-	local __section="$1"
-	local __master="$2"
-
-	network_is_up "$__section" || return
-
-	local __device=""
-	network_get_device __device "$__section"
-
-	local __cmaster=""
-	config_get __cmaster "$__section" relay_master
-
-	[ "$__master" == "$__cmaster" ] && {
-		disable_interface "$__section"
-		enable_interface "$__section" "$__device"
-	}
-}
-
-
-add_relay_slave() {
-	local __section="$1"
-	local __return="$2"
-	local __master="$3"
-	local __mode="$4"
-
-	network_is_up "$__section" || return
-
-	# Get device
-	local __device=""
-	network_get_device __device "$__section"
-
-	# Match master network
-	local __cmaster=""
-	config_get __cmaster "$__section" relay_master
-	[ "$__master" == "$__cmaster" ] || return
-	
-	# Test slave  mode
-	local __cmode=""
-	config_get __cmode "$__section" mode
-	[ "$__cmode" == "downstream" ] && __cmode="router"
-
-	# Don't start fallback interfaces if we are in forced-relay mode
-	[ "$__cmode" == "relay" -o "$__mode" == "fallback" ] || return
-
-	# Don't make non-relay or non-router interfaces slaves
-	[ "$__cmode" == "relay" -o "$__cmode" == "router" ] || return
-
-	# Disable any active distribution
-	[ "$__cmode" == "router" ] && disable_router "$__section"
-
-	# Configure interface to accept RA and send RS
-	conf_set "$__device" accept_ra 2
-	conf_set "$__device" forwarding 2
-
-	eval "$__return"'="$'"$__return"' '"$__device"'"'
-}
-
-
-stop_relay() {
-	local network="$1"
-	local pid_fallback="/var/run/ipv6-relay-fallback-$network.pid"
-	local pid_forced="/var/run/ipv6-relay-forced-$network.pid"
-	local was_fallback=""
-	
-	stop_service /usr/sbin/6relayd "$pid_fallback" was_fallback
-	stop_service /usr/sbin/6relayd "$pid_forced"
-
-	# Reenable normal distribution on slave interfaces	
-	[ -n "$was_fallback" ] && config_foreach restart_relay_slave interface "$network"
-}
-
-
-detect_forced_relay_mode() {
-	local __section="$1"
-	local __mode="$2"
-
-	local __cmode
-	config_get __cmode "$__section" mode
-	[ "$__cmode" == "relay" ] && eval "$__mode=forced"
-}
-
-
-restart_relay() {
-	local network="$1"
-	local mode="$2"
-
-	# Stop last active relay
-	stop_relay "$network"
-
-	# Detect if we have a forced-relay
-	[ -z "$mode" ] && config_foreach detect_forced_relay_mode interface mode
-
-	# Don't start without a mode
-	[ -z "$mode" ] && return
-
-	# Detect master device
-	local device=""
-	network_get_device device "$network"
-
-	# Generate command string
-	local cmd="/usr/sbin/6relayd -A $device"
-	local ifaces=""
-	config_foreach add_relay_slave interface ifaces "$network" "$mode"
-
-	# Start relay
-	local pid="/var/run/ipv6-relay-$mode-$network.pid"
-	[ -n "$ifaces" ] && start_service "$cmd $ifaces" "$pid"
-
-	# There are no slave interface, however indicate that we want to relay
-	[ -z "$ifaces" ] && touch "$pid"
-}
-
-
-setup_prefix_fallback() {
-	local cmd="$1"
-	local network="$2"
-	local device="$3"
-
-	stop_relay "$network"
-	restart_relay "$network"
-
-	setup_masquerading stop "$network"
-
-	[ "$cmd" != "stop" ] && {
-		local fallback=""
-		config_get fallback "$network" prefix_fallback
-
-		[ "$fallback" == "relay" ] && restart_relay "$network" fallback
-		[ "$fallback" == "masquerade" ] && setup_masquerading start "$network" "$device"
-	}
-}
-
-
-restart_master_relay() {
-	local network="$1"
-	local mode="$2"
-
-	# Disable active relaying to this interface
-	config_get relay_master "$network" relay_master
-	[ -z "$relay_master" ] && return
-	network_is_up "$relay_master" || return
-
-	# Detect running mode
-	local pid_fallback="/var/run/ipv6-relay-fallback-$relay_master.pid"
-	local pid_forced="/var/run/ipv6-relay-forced-$relay_master.pid"
-	[ -z "$mode" -a -f "$pid_fallback" ] && mode="fallback"
-	[ -z "$mode" -a -f "$pid_forced" ] && mode="forced"
-
-	# Restart relay if running or start requested
-	[ -n "$mode" ] && restart_relay "$relay_master" "$mode"
-}
-
-
-set_site_border() {
-	local network="$1"
-	local device="$2"
-
-	local fwscript="/var/etc/ipv6-firewall.d/site-border-$network.sh"
-	local chain="ipv6-site-border-$network"
-
-	if [ -n "$device" ]; then
-		local site_border
-		config_get_bool site_border "$network" site_border 1
-		[ "$site_border" == "1" ] || return
-
-		mkdir -p $(dirname "$fwscript")
-		echo "ip6tables -N $chain" > "$fwscript"
-		echo "ip6tables -F $chain" >> "$fwscript"
-		echo "ip6tables -A $chain -o $device -j REJECT --reject-with icmp6-no-route" >> "$fwscript"
-		echo "ip6tables -A $chain -i $device -j REJECT --reject-with icmp6-no-route" >> "$fwscript"
-		echo "ip6tables -A ipv6-site-border -j $chain" >> "$fwscript"
-		. "$fwscript"
-	else
-		[ -f "$fwscript" ] || return
-		rm -f "$fwscript"
-		ip6tables -D ipv6-site-border -j "$chain"
-		ip6tables -F "$chain"
-		ip6tables -X "$chain"
-	fi
-}
-
-
-set_forward_border() {
-	local network="$1"
-	local device="$2"
-	local method="$3"
-	local fwscript="/var/etc/ipv6-firewall.d/forward-border-$network.sh"
-
-	if [ "$method" == "enable" ]; then
-		mkdir -p $(dirname "$fwscript")
-		echo "ip6tables -A forwarding_rule -o \"$device\" -j REJECT --reject-with icmp6-no-route" > "$fwscript"
-		. "$fwscript"
-	else
-		[ -f "$fwscript" ] || return
-		rm -f "$fwscript"
-		# Racy race race
-		ip6tables -D forwarding_rule -o "$device" -j REJECT --reject-with icmp6-no-route 2>/dev/null
-		ip6tables -D forwarding_rule -o "$device" -j REJECT --reject-with icmp6-no-route 2>/dev/null
-	fi
-}
-
-
-disable_interface() {
-	local network="$1"
-
-	# Delete all prefixes routed to this interface
-	ubus call 6distributed delprefix '{"network": "'"$network"'"}'
-
-	# Restart Relay
-	restart_master_relay "$network"
-
-	# Disable distribution
-	disable_router "$network"
-
-	# Disable any active relays, masquerading rules and NPT rules
-	stop_relay "$network"
-	setup_masquerading stop "$network"
-	setup_npt_chain stop "$network"
-
-	# Disable DHCPv6 client if enabled, state script will take care
-	stop_service /usr/sbin/odhcp6c "/var/run/ipv6-dhcpv6-$network.pid"
-
-	# Stop site-border
-	set_site_border "$network"
-}
-
-
-enable_ula_prefix() {
-	local network="$1"
-	local ula="$2"
-	local device="$3"
-	[ -z "$ula" ] && ula="global"
-
-	# ULA-integration
-	local ula_prefix=""
-	config_get ula_prefix "$ula" ula_prefix
-
-	# ULA auto configuration (first init)
-	[ "$ula_prefix" == "auto" ] && {
-		local r1=""
-		local r2=""
-		local r3=""
-
-		# Sometimes results are empty, therefore try until it works...		
-		while [ -z "$r1" -o -z "$r2" -o -z "$r3" ]; do
-			r1=$(printf "%02x" $(($(</dev/urandom tr -dc 0-9 | dd bs=9 count=1) % 256)))
-			r2=$(printf "%01x" $(($(</dev/urandom tr -dc 0-9 | dd bs=9 count=1) % 65536)))
-			r3=$(printf "%01x" $(($(</dev/urandom tr -dc 0-9 | dd bs=9 count=1) % 65536)))
-		done
-		
-		ula_prefix="fd$r1:$r2:$r3::/48"
-
-		# Save prefix so it will be preserved across reboots
-		config_set "$ula" ula_prefix "$ula_prefix"
-		uci_set network6 "$ula" ula_prefix "$ula_prefix"
-		uci_commit network6
-	}
-
-	# Announce ULA
-	[ -n "$ula_prefix" ] && announce_prefix "$ula_prefix" "$network" "$device" newprefix secondary
-}
-
-
-enable_static() {
-	local network="$1"
-	local device="$2"
-
-	# Enable global forwarding
-	local global_forward
-	conf_get global_forward all forwarding
-	[ "$global_forward" != "1" ] && conf_set all forwarding 1
-
-	# Configure device
-	conf_set "$device" forwarding 1
-	conf_set "$device" accept_ra 1
-
-	# Enable ULA
-	enable_ula_prefix "$network" global "$device"
-	# Compatibility (deprecated)
-	enable_ula_prefix "$network" "$network" "$device"
-
-	# Announce all static prefixes
-	config_list_foreach "$network" static_prefix announce_prefix "$network" "$device"
-
-	# start relay if there are forced relay members
-	restart_relay "$network"
-}
-
-
-enable_router() {
-	local network="$1"
-	local device="$2"
-
-	# Get IPv6 prefixes
-	local length
-	config_get length "$network" advertise_prefix
-	[ -z "$length" ] && length=64
-	[ "$length" -ne "0" ] && ubus call 6distributed newiface '{"network": "'"$network"'", "iface": "'"$device"'", "length": '"$length"'}'
-
-	# Start RD & DHCPv6 service
-	local router_service
-	config_get router_service global router_service
-
-	local always_default
-	config_get_bool always_default "$network" always_default 0
-
-	if [ "$router_service" == "dnsmasq" ]; then
-		local dnsmasq_opts
-		config_get dnsmasq_opts "$network" dnsmasq_opts
-		[ -z "$dnsmasq_opts" ] && dnsmasq_opts="ra-names,24h"
-
-		local conf="/var/etc/dnsmasq.d/ipv6-router-$network.conf"
-		mkdir -p $(dirname $conf)
-		echo "dhcp-range=::00ff,::ffff,constructor:$device,$dnsmasq_opts" > $conf
-		echo "enable-ra" >> $conf
-		/etc/init.d/dnsmasq restart
-	else
-		local opts=""
-		[ "$always_default" == "1" ] && opts="-u"
-
-		local pid="/var/run/ipv6-router-$network.pid"
-		start_service "/usr/sbin/6relayd -S $opts . $device" "$pid"
-	fi
-
-	# Try relaying if necessary
-	restart_master_relay "$network"
-}
-
-
-enable_dhcpv6() {
-	local network="$1"
-	local device="$2"
-	
-	# Configure DHCPv6-client
-	local dhcp6_opts="$device"
-
-	# Configure DHCPv6-client (e.g. requested prefix)
-	local request_prefix
-	config_get request_prefix "$network" request_prefix
-	[ -z "$request_prefix" ] && request_prefix="auto"
-	[ "$request_prefix" != "no" ] && {
-		[ "$request_prefix" == "auto" ] && request_prefix=0
-		dhcp6_opts="-P$request_prefix $dhcp6_opts"
-	}
-	
-	# Start DHCPv6 client
-	local pid="/var/run/ipv6-dhcpv6-$network.pid"
-	start_service "/usr/sbin/odhcp6c -s/lib/ipv6/dhcpv6.sh $dhcp6_opts" "$pid"
-}
-
-
-enable_6to4() {
-	local network="$1"
-	local device="$2"
-	local mode="$3"
-
-	local prefixlen="48"
-	[ "$mode" == "6rd" ] && {
-		local ip4prefix=$(uci_get network "$network" ip4prefixlen 0)
-		local ip6prefix=$(uci_get network "$network" ip6prefixlen 32)
-		prefixlen=$(($ip6prefix + 32 - $ip4prefix))
-	}
-
-	local prefix=""
-	network_get_ipaddr6 prefix "$network"
-
-	announce_prefix "$prefix/$prefixlen" "$network" "$device"
-}
-
-
-enable_interface()
-{
-	local network="$1"
-	local device="$2"
-	local mode=""
-
-	config_get mode "$network" mode
-	[ -n "$mode" -a "$mode" != "none" ] || return
-
-	# Compatibility with old mode names
-	[ "$mode" == "downstream" ] && mode=router
-	[ "$mode" == "upstream" ] && mode=dhcpv6
-
-	# Enable site-border
-	[ "$mode" == "static" -o "$mode" == "dhcpv6" -o "$mode" == "6to4" -o "$mode" == "6in4" ] && set_site_border "$network" "$device"
-
-	# Run mode startup code
-	enable_static "$network" "$device"
-	[ "$mode" == "dhcpv6" ] && enable_dhcpv6 "$network" "$device"
-	[ "$mode" == "router" ] && enable_router "$network" "$device"
-	[ "$mode" == "6to4" -o "$mode" == "6rd" ] && enable_6to4 "$network" "$device" "$mode"
-	[ "$mode" == "relay" ] && restart_master_relay "$network" forced
-}