#!/bin/bash
# 
# Scaredycat's simple gta01 setup script

#
# local ip config
#

LOCAL_IP='192.168.0.200'
LOCAL_NM='255.255.255.0'

#
# ip address of neo
#

NEO_IP='192.168.0.202'

#
# set the port that the neo is connected on and the user we drop to
#

P_USB='usb0'
USER='nobody'

#
# set other dnrd params
#

#
# don't use my local hosts file
#

USE_HOSTS='-moff'

#
# debug level, just so you can see it working. make it ''
# to turn off debug mode and fork
#

DEBUG='-d3'

#
# *******************************************************************
# ****** You don't need to fiddle with anything below this line *****
# *******************************************************************         
#
# configure external apps
#


IFCONFIG=`which ifconfig`
DNRD=`which dnrd`
IPTABLES='iptables'
ROUTE='/sbin/route'

# split ip

for foo in 1 2 3 4; do
        IPADDR[$foo]=`echo ${LOCAL_IP}|cut -d"." -f$foo`
done

#split mask

for foo in 1 2 3 4; do
        MASK[$foo]=`echo ${LOCAL_NM}|cut -d"." -f$foo`
done

for foo in 1 2 3 4; do
        NETADDR[$foo]=$((${IPADDR[$foo]} & ${MASK[$foo]}))
        BROADCAST[$foo]=$((${NETADDR[$foo]} | $((${MASK[$foo]} ^255))))
done

NETWORK="${NETADDR[1]}.${NETADDR[2]}.${NETADDR[3]}.${NETADDR[4]}"

${IFCONFIG} ${P_USB} ${LOCAL_IP} netmask ${LOCAL_NM}
${ROUTE} add -host ${NEO_IP}/32 dev ${P_USB}
${IPTABLES} -A POSTROUTING -t nat -j MASQUERADE -s ${NETWORK}/24
echo 1 > /proc/sys/net/ipv4/ip_forward
${IPTABLES} -P FORWARD ACCEPT

# read current resolv.conf and get nameservers
#

S_LIST=`cat /etc/resolv.conf | grep nameserver | sed 's/nameserver /-s/'`
S_PARAMS=' '

for S_ITEM in ${S_LIST} 
do
	S_PARAMS="${S_PARAMS} ${S_ITEM}"
done

#
# run dnrd with all the params
#

if [ -n ${LOCALIP} ] ; then
	${DNRD} -a ${LOCAL_IP} ${S_PARAMS} -u${USER} ${DEBUG} ${USE_HOSTS}
fi