oldnet: ip6rd support
X-Gentoo-Bug: 392223 X-Gentoo-Bug-URL: https://bugs.gentoo.org/show_bug.cgi?id=392223 Signed-off-by: Robin H. Johnson <robbat2@gentoo.org>
This commit is contained in:
Salah Coronya
Robin H. Johnson
parent
497ff7ee41
commit
659f7c2bc8
168
net/ip6rd.sh
Normal file
168
net/ip6rd.sh
Normal file
@ -0,0 +1,168 @@
|
||||
# Copyright (c) 2011 by Gentoo Foundation
|
||||
# Released under the 2-clause BSD license.
|
||||
|
||||
_config_vars="$_config_vars link prefix suffix ipv4mask relay"
|
||||
|
||||
ip6rd_depend()
|
||||
{
|
||||
program ip
|
||||
after interface
|
||||
}
|
||||
|
||||
ip6rd_pre_start()
|
||||
{
|
||||
# ALL interfaces run pre_start blocks, not just those with something
|
||||
# assigned, so we must check if we need to run on this interface before we
|
||||
# do so.
|
||||
local config
|
||||
eval config=\$config_${IFVAR}
|
||||
[ "$config" = "ip6rd" ] || return 0
|
||||
|
||||
case "${MODULES}" in
|
||||
*" ifconfig "*)
|
||||
eerror "ifconfig is not supported for 6rd"
|
||||
eerror "Please emerge sys-apps/iproute2"
|
||||
return 1
|
||||
;;
|
||||
esac
|
||||
|
||||
local host= suffix= relay= addr= iface=${IFACE} config_ip6rd= localip= ipv4mask=
|
||||
eval host=\$link_${IFVAR}
|
||||
if [ -z "${host}" ]; then
|
||||
eerror "link_${IFVAR} not set"
|
||||
return 1
|
||||
fi
|
||||
|
||||
eval host=\${link_${IFVAR}}
|
||||
eval ipv4mask=\${ipv4mask_${IFVAR}:-0}
|
||||
eval suffix=\${suffix_${IFVAR}:-1}
|
||||
eval relay=\${relay_${IFVAR}}
|
||||
eval prefix=\${prefix_${IFVAR}}
|
||||
|
||||
IFACE=${host}
|
||||
addrs=$(_get_inet_addresses)
|
||||
IFACE=${iface}
|
||||
if [ -z "${addrs}" ]; then
|
||||
eerror "${host} is not configured with an IPv4 address"
|
||||
return 1
|
||||
fi
|
||||
# TODO: Get this settings from DHCP (Option 212)
|
||||
if [ -z "${prefix}" ]; then
|
||||
eerror "prefix_${IFVAR} not set"
|
||||
return 1
|
||||
fi
|
||||
if [ -z "${relay}" ]; then
|
||||
eerror "relay_${IFVAR} not set"
|
||||
return 1
|
||||
fi
|
||||
for addr in ${addrs}; do
|
||||
# Strip the subnet
|
||||
local ip="${addr%/*}" subnet="${addr#*/}"
|
||||
# We don't work on private IPv4 addresses
|
||||
if _ip6rd_inet_is_private_network "${ip}"
|
||||
then
|
||||
continue
|
||||
fi
|
||||
|
||||
local ip6= ip6_prefix="${prefix%::/*}" ip6_subnet="${prefix#*/}"
|
||||
ip6_subnet=$((ip6_subnet + (32-ipv4mask)))
|
||||
eval ip6="$(printf "${ip6_prefix}:%s::%s" \
|
||||
$(_ip6rd_prefix_shave_bits ${ip} ${ipv4mask}) ${suffix})"
|
||||
veinfo "Derived IPv6 address: ${ip6}"
|
||||
|
||||
# Now apply our IPv6 address to our config
|
||||
config_ip6rd="${config_ip6rd}${config_ip6rd:+ }${ip6}/${ip6_subnet}"
|
||||
|
||||
if [ -n "${localip}" ]; then
|
||||
localip="any"
|
||||
else
|
||||
localip="${ip}"
|
||||
fi
|
||||
done
|
||||
|
||||
if [ -z "${config_ip6rd}" ]; then
|
||||
eerror "No global IPv4 addresses found on interface ${host}"
|
||||
return 1
|
||||
fi
|
||||
|
||||
ebegin "Creating 6rd tunnel ${IFACE}"
|
||||
if [ "${IFACE}" != "sit0" ]; then
|
||||
_tunnel add "${IFACE}" mode sit ttl 255 remote any local "${localip}"
|
||||
fi
|
||||
_tunnel 6rd dev "${IFACE}" 6rd-prefix "${prefix}"
|
||||
eend $? || return 1
|
||||
_up
|
||||
|
||||
routes_ip6rd="2003::/3 via ::${relay} metric 2147483647"
|
||||
service_set_value "config_ip6rd_$IFVAR" "$config_ip6rd"
|
||||
service_set_value "routes_ip6rd_$IFVAR" "$routes_ip6rd"
|
||||
}
|
||||
|
||||
ip6rd_start()
|
||||
{
|
||||
local config_ip6rd=$(service_get_value "config_ip6rd_$IFVAR")
|
||||
local routes_ip6rd=$(service_get_value "routes_ip6rd_$IFVAR")
|
||||
|
||||
# Now apply our config
|
||||
eval config_${config_index}=\'"${config_ip6rd}"\'
|
||||
: $(( config_index -= 1 ))
|
||||
|
||||
# Add a route for us, ensuring we don't delete anything else
|
||||
local routes="$(_get_array "routes_${IFVAR}")
|
||||
$routes_ip6rd"
|
||||
eval routes_${IFVAR}=\$routes
|
||||
}
|
||||
|
||||
_ip6rd_inet_atoi()
|
||||
{
|
||||
local IFS="${IFS}." ipi=0 j=3
|
||||
for i in $1 ; do
|
||||
ipi=$(( ipi | i << 8*j-- ))
|
||||
done
|
||||
echo ${ipi}
|
||||
}
|
||||
|
||||
_ip6rd_inet_itoa()
|
||||
{
|
||||
local ipi=$1
|
||||
for i in 0 1 2 3; do
|
||||
if [ $i != 3 ] ; then
|
||||
printf "%d." $(( (ipi & ~((1<<24)-1)) >> 24 ))
|
||||
ipi=$(( (ipi & ((1<<24)-1)) << 8))
|
||||
else
|
||||
printf "%d\n" $(( (ipi & ~((1<<24)-1)) >> 24 ))
|
||||
fi
|
||||
done
|
||||
}
|
||||
|
||||
_ip6rd_inet_get_network()
|
||||
{
|
||||
echo $(_ip6rd_inet_itoa $(( ($(_ip6rd_inet_atoi $1) & ((1<<$2)-1) << (32-$2) ) )) )
|
||||
}
|
||||
|
||||
_ip6rd_inet_is_private_network()
|
||||
{
|
||||
if [ "$(_ip6rd_inet_get_network $1 16)" = "192.168.0.0" ]\
|
||||
|| [ "$(_ip6rd_inet_get_network $1 8)" = "10.0.0.0" ]\
|
||||
|| [ "$(_ip6rd_inet_get_network $1 12)" = "172.16.0.0" ]\
|
||||
|| [ "$(_ip6rd_inet_get_network $1 16)" = "169.254.0.0" ]
|
||||
then
|
||||
return 0;
|
||||
fi
|
||||
return 1;
|
||||
}
|
||||
|
||||
_ip6rd_prefix_shave_bits()
|
||||
{
|
||||
local ipi=
|
||||
ipi=$(( ($(_ip6rd_inet_atoi $1) & (1<<(32-$2))-1) << $2))
|
||||
if [ $2 -le 16 ]
|
||||
then
|
||||
printf "%04x:%0$(( (16-$2>>2)+(($2%4)?1:0) ))x" \
|
||||
$((ipi >> 16)) $((ipi & (1<<(16-$2))-1))
|
||||
elif [ $2 -lt 32 ]
|
||||
then
|
||||
printf "%0$(( (32-$2>>2)+(($2%4)?1:0) ))x" \
|
||||
$((ipi >> 16))
|
||||
fi
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user