- support for automatic 6to4 tunnels

[projects/rc-scripts.git] / sysconfig / network-scripts / ifup

diff --git a/sysconfig/network-scripts/ifup b/sysconfig/network-scripts/ifup
index eba7b82fa7f6d32a89ad5374ecd74526f15e2262..f5d9631a190cd0473e6bcbf04225b00c743fdf41 100755 (executable)
--- a/sysconfig/network-scripts/ifup
+++ b/sysconfig/network-scripts/ifup
@@ -216,6 +216,27 @@ if is_yes "$IPX"; then
        /etc/sysconfig/network-scripts/ifup-ipx $DEVICE
 fi
 
+if is_yes "$ENABLE_6TO4"; then
+       # find an usable IPv4 address for this device; might have been obtained by dhcp or ppp
+       for ipv4 in `/sbin/ip addr show dev $DEVICE | awk '/ inet /{print $2}' | sed -e 's,/.*,,'`; do
+               if [   `ipcalc -n $ipv4/8`  != "NETWORK=10.0.0.0"    \
+                       -a `ipcalc -n $ipv4/12` != "NETWORK=172.16.0.0"  \
+                       -a `ipcalc -n $ipv4/24` != "NETWORK=192.168.0.0" \
+                       -a `ipcalc -n $ipv4/24` != "NETWORK=169.254.0.0" ]; then
+                       local_ipv4=$ipv4
+                       local_ipv6=`printf "2002:%02x%02x:%02x%02x::1" $(echo $ipv4 | tr . ' ')`
+                       break
+               fi
+       done
+       if [ -n "$local_ipv4" ]; then   # we have an usable IPv4 address; set up the tunnel
+               tun6to4=tun6to4_$DEVICE 
+               /sbin/ip tunnel add $tun6to4 mode sit ttl 128 remote any local $local_ipv4
+               /sbin/ip link set dev $tun6to4 up
+               /sbin/ip -6 addr  add $local_ipv6/16 dev $tun6to4
+               /sbin/ip -6 route add 2000::/3 via ::192.88.99.1 dev $tun6to4 metric 1
+       fi
+fi
+
 if [ "$HANDLING" = "4" ]; then
        exit 0
 fi