mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-12-26 12:14:36 +02:00
dfa547c5a8
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@28223 3c298f89-4303-0410-b956-a3cf2f4a3e73
274 lines
7.2 KiB
Bash
Executable File
274 lines
7.2 KiB
Bash
Executable File
# 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
|
|
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"
|
|
}
|
|
}
|