openrc/net.Linux/ip6to4.sh
Roy Marples 5af58b4514 Rewrite the core parts in C. We now provide librc so other programs can
query runlevels, services and state without using bash. We also provide
libeinfo so other programs can easily use our informational functions.

As such, we have dropped the requirement of using bash as the init script
shell. We now use /bin/sh and have strived to make the scripts as portable
as possible. Shells that work are bash and dash. busybox works provided
you disable s-s-d. If you have WIPE_TMP set to yes in conf.d/bootmisc you
should disable find too.
zsh and ksh do not work at this time.

Networking support is currently being re-vamped also as it was heavily bash
array based. As such, a new config format is available like so
config_eth0="1.2.3.4/24 5.6.7.8/16"
or like so
config_eth0="'1.2.3.4 netmask 255.255.255.0' '5.6.7.8 netmask 255.255.0.0'"

We will still support the old bash array format provided that /bin/sh IS
a link it bash.

ChangeLog for baselayout-1 can be found in our SVN repo.
2007-04-05 11:18:42 +00:00

98 lines
2.2 KiB
Bash

# Copyright 2004-2007 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
_config_vars="$_config_vars link suffix relay"
ip6to4_depend() {
after interface
}
ip6to4_start() {
case " ${MODULES} " in
*" ifconfig "*)
if [ "${IFACE}" != "sit0" ] ; then
eerror "ip6to4 can only work on the sit0 interface using ifconfig"
eerror "emerge sys-apps/iproute2 to use other interfaces"
return 1
fi
esac
local host= suffix= relay= addr= iface=${IFACE} new=
eval host=\$link_${IFVAR}
if [ -z "${host}" ] ; then
eerror "link_${IFVAR} not set"
return 1
fi
eval suffix=\${suffix_${IFVAR}:-1}
eval relay=\${relay_${IFVAR}:-192.88.99.1}
IFACE=${host}
addrs=$(_get_inet_addresses)
IFACE=${iface}
if [ -z "${addrs}" ] ; then
eerror "${host} is not configured with an IPv4 address"
return 1
fi
for addr in ${addrs} ; do
# Strip the subnet
local ip="${addr%/*}" subnet="${addr#*/}"
# We don't work on private IPv4 addresses
case "${ip}" in
127.*) continue ;;
10.*) continue ;;
192.168.*) continue ;;
172.*)
local i=16
while [ ${i} -lt 32 ] ; do
case "${ip}" in
172.${i}.*) break ;;
esac
i=$((${i} + 1))
done
[ ${i} -lt 32 ] && continue
;;
esac
veinfo "IPv4 address on ${host}: ${ip}/${subnet}"
local OIFS=$IFS SIFS=${IFS-y} ipa= ip6=
IFS="${IFS}."
for i in ${ip} ; do
ipa="${ipa} ${i}"
done
if [ "${SIFS}" = "y" ] ; then
IFS=$OIFS
else
unset IFS
fi
eval ip6="$(printf "2002:%02x%02x:%02x%02x::%s" ${ipa} ${suffix})"
veinfo "Derived IPv6 address: ${ip6}"
# Now apply our IPv6 address to our config
new="${new}${new:+ }${ip6}/16"
done
if [ -z "${new}" ] ; then
eerror "No global IPv4 addresses found on interface ${host}"
return 1
fi
if [ "${IFACE}" != "sit0" ] ; then
ebegin "Creating 6to4 tunnel on ${IFACE}"
_tunnel add "${IFACE}" mode sit ttl 255 remote any local "${ip}"
eend $? || return 1
_up
fi
# Now apply our config
eval config_${config_index}=\'"${new}"\'
config_index=$((${config_index} - 1))
# Add a route for us, ensuring we don't delete anything else
eval $(_get_array "routes_${IFVAR}")
eval routes_${IFVAR}="\"$@ '2003::/3 via ::${relay} metric 2147483647'\""
}
# vim: set ts=4 :