ef1ff1b4f2
Convert the style:
var=$((${var} + 1))
to:
: $(( var += 1 ))
The latter is easier to read imo.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
100 lines
2.2 KiB
Bash
100 lines
2.2 KiB
Bash
# Copyright (c) 2007-2008 Roy Marples <roy@marples.name>
|
|
# Released under the 2-clause BSD license.
|
|
|
|
_config_vars="$_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=${IFACE} new= localip=
|
|
eval host=\$link_${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 += 1 ))
|
|
done
|
|
[ ${i} -lt 32 ] && continue
|
|
;;
|
|
esac
|
|
|
|
veinfo "IPv4 address on ${host}: ${ip}/${subnet}"
|
|
local ipa= ip6= IFS="${IFS}."
|
|
for i in ${ip}; do
|
|
ipa="${ipa} ${i}"
|
|
done
|
|
unset IFS
|
|
eval ip6="$(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"
|
|
|
|
if [ -n "${localip}" ]; then
|
|
localip="any"
|
|
else
|
|
localip="${ip}"
|
|
fi
|
|
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 "${localip}"
|
|
eend $? || return 1
|
|
_up
|
|
fi
|
|
|
|
# Now apply our config
|
|
eval config_${config_index}=\'"${new}"\'
|
|
: $(( config_index -= 1 ))
|
|
|
|
# Add a route for us, ensuring we don't delete anything else
|
|
local routes="$(_get_array "routes_${IFVAR}")
|
|
2003::/3 via ::${relay} metric 2147483647"
|
|
eval routes_${IFVAR}=\$routes
|
|
}
|