+++ /dev/null
-# 6to4.sh - IPv6-in-IPv4 tunnel backend
-# Copyright (c) 2010-2011 OpenWrt.org
-
-find_6to4_wanif() {
- local if=$(ip -4 r l e 0.0.0.0/0); if="${if#default* dev }"; if="${if%% *}"
- [ -n "$if" ] && grep -qs "^ *$if:" /proc/net/dev && echo "$if"
-}
-
-find_6to4_wanip() {
- local ip=$(ip -4 a s dev "$1"); ip="${ip#*inet }"
- echo "${ip%%[^0-9.]*}"
-}
-
-find_6to4_prefix() {
- local ip4="$1"
- local oIFS="$IFS"; IFS="."; set -- $ip4; IFS="$oIFS"
-
- printf "2002:%02x%02x:%02x%02x\n" $1 $2 $3 $4
-}
-
-test_6to4_rfc1918()
-{
- local oIFS="$IFS"; IFS="."; set -- $1; IFS="$oIFS"
- [ $1 -eq 10 ] && return 0
- [ $1 -eq 192 ] && [ $2 -eq 168 ] && return 0
- [ $1 -eq 172 ] && [ $2 -ge 16 ] && [ $2 -le 31 ] && return 0
-
- # RFC 6598
- [ $1 -eq 100 ] && [ $2 -ge 64 ] && [ $2 -le 127 ] && return 0
-
- return 1
-}
-
-set_6to4_radvd_interface() {
- local cfgid="$1"
- local lanif="${2:-lan}"
- local ifmtu="${3:-1280}"
- local ifsection=""
-
- find_ifsection() {
- local net
- local cfg="$1"
- config_get net "$cfg" interface
-
- [ "$net" = "$lanif" ] && {
- ifsection="$cfg"
- return 1
- }
- }
-
- config_foreach find_ifsection interface
-
- [ -z "$ifsection" ] && {
- ifsection="iface_$sid"
- uci_set_state radvd "$ifsection" "" interface
- uci_set_state radvd "$ifsection" interface "$lanif"
- }
-
- uci_set_state radvd "$ifsection" ignore 0
- uci_set_state radvd "$ifsection" IgnoreIfMissing 1
- uci_set_state radvd "$ifsection" AdvSendAdvert 1
- uci_set_state radvd "$ifsection" MaxRtrAdvInterval 30
- uci_set_state radvd "$ifsection" AdvLinkMTU "$ifmtu"
-}
-
-set_6to4_radvd_prefix() {
- local cfgid="$1"
- local lanif="${2:-lan}"
- local wanif="${3:-wan}"
- local prefix="${4:-0:0:0:1::/64}"
- local vlt="${5:-300}"
- local plt="${6:-120}"
- local pfxsection=""
-
- find_pfxsection() {
- local net base
- local cfg="$1"
- config_get net "$cfg" interface
- config_get base "$cfg" Base6to4Interface
-
- [ "$net" = "$lanif" ] && [ "$base" = "$wanif" ] && {
- pfxsection="$cfg"
- return 1
- }
- }
-
- config_foreach find_pfxsection prefix
-
- [ -z "$pfxsection" ] && {
- pfxsection="prefix_${sid}_${lanif}"
- uci_set_state radvd "$pfxsection" "" prefix
- uci_set_state radvd "$pfxsection" ignore 0
- uci_set_state radvd "$pfxsection" interface "$lanif"
- uci_set_state radvd "$pfxsection" prefix "$prefix"
- uci_set_state radvd "$pfxsection" AdvOnLink 1
- uci_set_state radvd "$pfxsection" AdvAutonomous 1
- uci_set_state radvd "$pfxsection" AdvValidLifetime "$vlt"
- uci_set_state radvd "$pfxsection" AdvPreferredLifetime "$plt"
- uci_set_state radvd "$pfxsection" Base6to4Interface "$wanif"
- }
-}
-
-
-# Hook into scan_interfaces() to synthesize a .device option
-# This is needed for /sbin/ifup to properly dispatch control
-# to setup_interface_6to4() even if no .ifname is set in
-# the configuration.
-scan_6to4() {
- config_set "$1" device "6to4-$1"
-}
-
-coldplug_interface_6to4() {
- setup_interface_6to4 "6to4-$1" "$1"
-}
-
-setup_interface_6to4() {
- local iface="$1"
- local cfg="$2"
- local link="6to4-$cfg"
-
- local local4=$(uci_get network "$cfg" ipaddr)
-
- local mtu
- config_get mtu "$cfg" mtu
-
- local ttl
- config_get ttl "$cfg" ttl
-
- local metric
- config_get metric "$cfg" metric
-
- local defaultroute
- config_get_bool defaultroute "$cfg" defaultroute 1
-
- local wanif=$(find_6to4_wanif)
- [ -z "$wanif" ] && {
- logger -t "$link" "Cannot find wan interface - aborting"
- return
- }
-
- local wancfg=$(find_config "$wanif")
- [ -z "$wancfg" ] && {
- logger -t "$link" "Cannot find wan network - aborting"
- return
- }
-
- # If local4 is unset, guess local IPv4 address from the
- # interface used by the default route.
- [ -z "$local4" ] && {
- [ -n "$wanif" ] && {
- local4=$(find_6to4_wanip "$wanif")
- uci_set_state network "$cfg" wan_device "$wanif"
- }
- }
-
- test_6to4_rfc1918 "$local4" && {
- logger -t "$link" "Local wan ip $local4 is private - aborting"
- return
- }
-
- [ -n "$local4" ] && {
- logger -t "$link" "Starting ..."
-
- # creating the tunnel below will trigger a net subsystem event
- # prevent it from touching or iface by disabling .auto here
- uci_set_state network "$cfg" ifname $link
- uci_set_state network "$cfg" auto 0
-
- # find our local prefix
- local prefix6=$(find_6to4_prefix "$local4")
- local local6="$prefix6::1/16"
-
- logger -t "$link" " * IPv4 address is $local4"
- logger -t "$link" " * IPv6 address is $local6"
- ip tunnel add $link mode sit remote any local $local4 ttl ${ttl:-64}
- ip link set $link up
- ip link set mtu ${mtu:-1280} dev $link
- ip addr add $local6 dev $link
-
- uci_set_state network "$cfg" ipaddr $local4
- uci_set_state network "$cfg" ip6addr $local6
-
- [ "$defaultroute" = 1 ] && {
- logger -t "$link" " * Adding default route"
- ip -6 route add ::/0 via ::192.88.99.1 metric ${metric:-1} dev $link
- uci_set_state network "$cfg" defaultroute 1
- }
-
- [ -f /etc/config/radvd ] && /etc/init.d/radvd enabled && {
- local sid="6to4_$cfg"
-
- uci_revert_state radvd
- config_load radvd
-
- # find delegation target
- local adv_interface
- config_get adv_interface "$cfg" adv_interface
-
- local adv_subnet=$(uci_get network "$cfg" adv_subnet)
- adv_subnet=$((0x${adv_subnet:-1}))
-
- local adv_subnets=""
-
- for adv_interface in ${adv_interface:-lan}; do
- local adv_ifname
- config_get adv_ifname "${adv_interface:-lan}" ifname
-
- grep -qs "^ *$adv_ifname:" /proc/net/dev && {
- local adv_valid_lifetime adv_preferred_lifetime
- config_get adv_valid_lifetime "$cfg" adv_valid_lifetime
- config_get adv_preferred_lifetime "$cfg" adv_preferred_lifetime
-
- local subnet6="$(printf "%s:%x::1/64" "$prefix6" $adv_subnet)"
-
- logger -t "$link" " * Advertising IPv6 subnet $subnet6 on ${adv_interface:-lan} ($adv_ifname)"
- ip -6 addr add $subnet6 dev $adv_ifname
-
- set_6to4_radvd_interface "$sid" "$adv_interface" "$mtu"
- set_6to4_radvd_prefix "$sid" "$adv_interface" \
- "$wancfg" "$(printf "0:0:0:%x::/64" $adv_subnet)" \
- "$adv_valid_lifetime" "$adv_preferred_lifetime"
-
- adv_subnets="${adv_subnets:+$adv_subnets }$adv_ifname:$subnet6"
- adv_subnet=$(($adv_subnet + 1))
- }
- done
-
- uci_set_state network "$cfg" adv_subnets "$adv_subnets"
-
- /etc/init.d/radvd restart
- }
-
- logger -t "$link" "... started"
-
- env -i ACTION="ifup" INTERFACE="$cfg" DEVICE="$link" PROTO=6to4 /sbin/hotplug-call "iface" &
- } || {
- echo "Cannot determine local IPv4 address for 6to4 tunnel $cfg - skipping"
- }
-}
-
-stop_interface_6to4() {
- local cfg="$1"
- local link="6to4-$cfg"
-
- local local6=$(uci_get_state network "$cfg" ip6addr)
- local defaultroute=$(uci_get_state network "$cfg" defaultroute)
-
- local adv_subnets=$(uci_get_state network "$cfg" adv_subnets)
-
- grep -qs "^ *$link:" /proc/net/dev && {
- logger -t "$link" "Shutting down ..."
- env -i ACTION="ifdown" INTERFACE="$cfg" DEVICE="$link" PROTO=6to4 /sbin/hotplug-call "iface" &
-
- [ -n "$adv_subnets" ] && {
- uci_revert_state radvd
- /etc/init.d/radvd enabled && /etc/init.d/radvd restart
-
- local adv_subnet
- for adv_subnet in $adv_subnets; do
- local ifname="${adv_subnet%%:*}"
- local subnet="${adv_subnet#*:}"
-
- logger -t "$link" " * Removing IPv6 subnet $subnet from interface $ifname"
- ip -6 addr del $subnet dev $ifname
- done
- }
-
- [ "$defaultroute" = "1" ] && \
- ip -6 route del ::/0 via ::192.88.99.1 dev $link
-
- ip addr del $local6 dev $link
- ip link set $link down
- ip tunnel del $link
-
- logger -t "$link" "... stopped"
- }
-}
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