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[package] add 6to4 - provides full automatic 6to setup with optional configuration in /etc/config/network
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@23996 3c298f89-4303-0410-b956-a3cf2f4a3e73
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jow
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44
package/6to4/Makefile
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44
package/6to4/Makefile
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#
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# Copyright (C) 2010 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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#
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include $(TOPDIR)/rules.mk
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PKG_NAME:=6to4
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PKG_VERSION:=1
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PKG_RELEASE:=1
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include $(INCLUDE_DIR)/package.mk
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define Package/6to4
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SECTION:=ipv6
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CATEGORY:=IPv6
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DEPENDS:=+ip +kmod-ipv6 +kmod-sit
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TITLE:=IPv6-to-IPv4 configuration support
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MAINTAINER:=Jo-Philipp Wich <xm@subsignal.org>
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PKGARCH:=all
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endef
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define Package/6to4/description
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Provides support for 6to4 tunnels in /etc/config/network.
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Refer to http://wiki.openwrt.org/doc/uci/network for
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configuration details.
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endef
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define Build/Compile
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endef
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define Build/Configure
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endef
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define Package/6to4/install
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$(INSTALL_DIR) $(1)/lib/network
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$(INSTALL_DATA) ./files/6to4.sh $(1)/lib/network/6to4.sh
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$(INSTALL_DIR) $(1)/etc/hotplug.d/iface
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$(INSTALL_DATA) ./files/6to4.hotplug $(1)/etc/hotplug.d/iface/91-6to4
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endef
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$(eval $(call BuildPackage,6to4))
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29
package/6to4/files/6to4.hotplug
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29
package/6to4/files/6to4.hotplug
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#!/bin/sh
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if [ "$ACTION" = ifup ]; then
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. /etc/functions.sh
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include /lib/network
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scan_interfaces
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update_tunnel() {
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local cfg="$1"
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local proto
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config_get proto "$cfg" proto
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[ "$proto" = 6to4 ] || return 0
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local wandev
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config_get wandev "$cfg" wan_device "$(find_6to4_wanif)"
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[ "$wandev" = "$DEVICE" ] || return 0
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local wanip=$(find_6to4_wanip "$wandev")
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[ -n "$wanip" ] && {
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uci_set_state network "$cfg" ipaddr "$wanip"
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( ifup "$cfg" )&
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}
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}
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config_foreach update_tunnel interface
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fi
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190
package/6to4/files/6to4.sh
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190
package/6to4/files/6to4.sh
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# 6to4.sh - IPv6-in-IPv4 tunnel backend
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# Copyright (c) 2010 OpenWrt.org
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find_6to4_wanif() {
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local if=$(ip -4 r l e 0.0.0.0/0); if="${if#default* dev }"; if="${if%% *}"
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[ -n "$if" ] && grep -qs "^ *$if:" /proc/net/dev && echo "$if"
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}
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find_6to4_wanip() {
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local ip=$(ip -4 a s dev "$1"); ip="${ip#*inet }"
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echo "${ip%%[^0-9.]*}"
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}
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find_6to4_prefix() {
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local ip4="$1"
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local oIFS="$IFS"; IFS="."; set -- $ip4; IFS="$oIFS"
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printf "2002:%02x%02x:%02x%02x\n" $1 $2 $3 $4
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}
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# Hook into scan_interfaces() to synthesize a .device option
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# This is needed for /sbin/ifup to properly dispatch control
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# to setup_interface_6to4() even if no .ifname is set in
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# the configuration.
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scan_6to4() {
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config_set "$1" device "6to4-$1"
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}
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coldplug_interface_6to4() {
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setup_interface_6to4 "6to4-$1" "$1"
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}
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setup_interface_6to4() {
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local iface="$1"
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local cfg="$2"
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local link="6to4-$cfg"
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local local4=$(uci_get network "$cfg" ipaddr)
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local remote4
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config_get remote4 "$cfg" peeraddr
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local mtu
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config_get mtu "$cfg" mtu
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local ttl
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config_get ttl "$cfg" ttl
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local defaultroute
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config_get_bool defaultroute "$cfg" defaultroute 1
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local wanif=$(find_6to4_wanif)
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[ -z "$wanif" ] && {
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logger -t "$link" "Cannot find wan interface - aborting"
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return
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}
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local wancfg=$(find_config "$wanif")
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[ -z "$wancfg" ] && {
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logger -t "$link" "Cannot find wan network - aborting"
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return
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}
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# If local4 is unset, guess local IPv4 address from the
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# interface used by the default route.
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[ -z "$local4" ] && {
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[ -n "$wanif" ] && {
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local4=$(find_6to4_wanip "$wanif")
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uci_set_state network "$cfg" wan_device "$wanif"
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}
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}
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[ -n "$local4" ] && {
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logger -t "$link" "Starting ..."
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# creating the tunnel below will trigger a net subsystem event
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# prevent it from touching or iface by disabling .auto here
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uci_set_state network "$cfg" ifname $link
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uci_set_state network "$cfg" auto 0
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# find our local prefix
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local prefix6=$(find_6to4_prefix "$local4")
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local local6="$prefix6::1/16"
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logger -t "$link" " * IPv4 address is $local4"
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logger -t "$link" " * IPv6 address is $local6"
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ip tunnel add $link mode sit remote any local $local4 ttl ${ttl:-64}
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ip link set $link up
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ip link set mtu ${mtu:-1280} dev $link
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ip addr add $local6 dev $link
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uci_set_state network "$cfg" ipaddr $local4
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uci_set_state network "$cfg" ip6addr $local6
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[ "$defaultroute" = 1 ] && {
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logger -t "$link" " * Adding default route"
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ip -6 route add 2000::/3 via ::192.88.99.1 dev $link metric 1
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uci_set_state network "$cfg" defaultroute 1
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}
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# find delegation target
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local adv_interface
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config_get adv_interface "$cfg" adv_interface
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local adv_ifname
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config_get adv_ifname "${adv_interface:-lan}" ifname
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local adv_subnet=$(uci_get network "$cfg" adv_subnet)
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grep -qs "^ *$adv_ifname:" /proc/net/dev && {
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local subnet6="$prefix6:${adv_subnet:-1}::1/64"
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logger -t "$link" " * Advertising IPv6 subnet $subnet6 on ${adv_interface:-lan} ($adv_ifname)"
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ip -6 addr add $subnet6 dev $adv_ifname
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uci_set_state network "$cfg" adv_subnet "$subnet6"
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uci_set_state network "$cfg" adv_ifname "$adv_ifname"
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[ -f /etc/config/radvd ] && /etc/init.d/radvd enabled && {
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local sid="6to4_$cfg"
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uci -q batch <<-EOF
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delete radvd.iface_$sid
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delete radvd.prefix_$sid
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set radvd.iface_$sid=interface
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set radvd.iface_$sid.ignore=0
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set radvd.iface_$sid.interface=${adv_interface:-lan}
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set radvd.iface_$sid.IgnoreIfMissing=1
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set radvd.iface_$sid.AdvSendAdvert=1
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set radvd.iface_$sid.MaxRtrAdvInterval=30
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set radvd.prefix_$sid=prefix
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set radvd.prefix_$sid.ignore=0
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set radvd.prefix_$sid.interface=${adv_interface:-lan}
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set radvd.prefix_$sid.prefix=0:0:0:${adv_subnet:-1}::/64
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set radvd.prefix_$sid.AdvOnLink=1
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set radvd.prefix_$sid.AdvAutonomous=1
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set radvd.prefix_$sid.AdvValidLifetime=300
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set radvd.prefix_$sid.AdvPreferredLifetime=120
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set radvd.prefix_$sid.Base6to4Interface=$wancfg
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EOF
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/etc/init.d/radvd restart
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}
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}
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logger -t "$link" "... started"
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env -i ACTION="ifup" INTERFACE="$cfg" DEVICE="$link" PROTO=6to4 /sbin/hotplug-call "iface" &
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} || {
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echo "Cannot determine local IPv4 address for 6to4 tunnel $cfg - skipping"
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}
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}
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stop_interface_6to4() {
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local cfg="$1"
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local link="6to4-$cfg"
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local local6=$(uci_get_state network "$cfg" ip6addr)
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local defaultroute=$(uci_get_state network "$cfg" defaultroute)
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local adv_subnet=$(uci_get_state network "$cfg" adv_subnet)
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local adv_ifname=$(uci_get_state network "$cfg" adv_ifname)
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grep -qs "^ *$link:" /proc/net/dev && {
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logger -t "$link" "Shutting down ..."
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env -i ACTION="ifdown" INTERFACE="$cfg" DEVICE="$link" PROTO=6to4 /sbin/hotplug-call "iface" &
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[ -n "$adv_subnet" ] && [ -n "$adv_ifname" ] && {
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local sid="6to4_$cfg"
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uci -q batch <<-EOF
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delete radvd.iface_$sid
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delete radvd.prefix_$sid
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EOF
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/etc/init.d/radvd enabled && /etc/init.d/radvd restart
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ip -6 addr del $adv_subnet dev $adv_ifname
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}
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[ "$defaultroute" = "1" ] && {
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ip -6 route del 2000::/3 via ::192.88.99.1 dev $link metric 1
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}
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ip addr del $local6 dev $link
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ip link set $link down
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ip tunnel del $link
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logger -t "$link" "... stopped"
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}
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}
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