#!/bin/sh
#
# SIXXS ipv6 startup script for WRT54G
#

# external IP (Your IPv4)
EXTIP=`/sbin/ifconfig vlan1 | grep 'inet addr' | awk '{print $2}' | sed -e 's/.*://'`
# My tunnel endpoint (Your IPv6)
MYTUNNELIP="2001:4978:f:32::2"
#My subnet prefix (Subnet Prefix)
SUBNET="2001:abc:abc:cba::"
# Sixxs tunnel endpoint (PoP IPv6)
SIXXSTUNNELIP="2001:4978:f:32::1"
# Sixxs POP IPv4 (PoP IPv4)
SIXXS4="216.14.98.22" 

# create tunnel
echo "- Creating SIXXS tunnel... ${EXTIP} <--> ${SIXXS4}"
/usr/sbin/ip tunnel add sixxs mode sit local ${EXTIP} remote ${SIXXS4}

# bring tunnel interface up explicitly
echo "- Bringing sixxs device up..."
/usr/sbin/ip link set sixxs up

# fix MTU and TTL
echo "- Fixing MTU and TTL of sixxs device..."
/usr/sbin/ip link set mtu 1280 dev sixxs
/usr/sbin/ip tunnel change sixxs ttl 64

# Add virthost IPs before adding tunnel IP
# ...

# configure IPv6 endpoint on the tunnel
echo "- Configuring my IPv6 tunnel endpoint..."
/usr/sbin/ip -6 addr add ${MYTUNNELIP}/64 dev sixxs

# default route
echo "- Adding default route through SIXXS..."
/usr/sbin/ip -6 ro add default via ${SIXXSTUNNELIP} dev sixxs

# add a /64 network from the /60 prefix to br0
#echo "- Setting up Subnet ..."
#/usr/sbin/ip -6 addr add ${SUBNET}/64 dev br0

# start router advertisement daemon
echo "- Starting radvd..."
/sbin/radvd -C /tmp/smbshare/etc/radvd.conf

echo "---- end IPv6 setup ----"

sleep 5
WANIP=$(ip -4 addr show dev vlan1 | grep 'inet ' | awk '{print $2}' | cut -d/ -f1)
if [ -n "$WANIP" ]
then
 V6PREFIX=$(printf '2002:%02x%02x:%02x%02x' $(echo $WANIP | tr . ' '))
 ip tunnel add tun6to4 mode sit ttl 255 remote any local $WANIP
 ip link set tun6to4 mtu 1280
 ip link set tun6to4 up
 ip addr add $V6PREFIX:0::1/16 dev tun6to4
 ip addr add $V6PREFIX:1::1/64 dev br0
 ip -6 route add 2000::/3 via ::192.88.99.1 dev tun6to4
 kill -HUP $(cat /var/run/radvd.pid)
fi