gistfile1.txt

#/bin/bash
# /etc/init.d/xdm: Login Procedure for Bob480
# Edited Sept-2001; Contact Author: [email protected] 

n=$1
n=$n"."
[ $n == "stop." ] && exit
moveon=0

set PATH="/bin:/usr/bin:/sbin"

############# ISIP - Test Validity of IP Address
# $1 - IP Address
function isip() {
	ifs="."
	[ $# -ne "4" ]   && echo "Not a valid IP address."  && return 0  
	[ $1 -gt "255" ] && echo "First 8-bit is invalid."  && return 0
	[ $2 -gt "255" ] && echo "Second 8-bit is invalid." && return 0
	[ $3 -gt "255" ] && echo "Third 8-bit is invalid."  && return 0
	[ $4 -gt "255" ] && echo "Fourth 8-bit is invalid." && return 0
}	
############# GETANSWER - Get User Input
function getanswer() {
	echo -n ">> "
	read answer
	if [ $answer == "[Qq]uit" ]; then  
		echo "Quitting and starting login daemon." 
		exit 0
	fi
}	
############# MANUAL CONF - Manual Configuration
function manualconf() {	
	cat << EOF 
If you are on a local network then I can try to configure myself automagically,
although it may take about 5 to 10 minutes and I may not succeed.  Would you 
like to try to auto configure
EOF

	getanswer
	case $answer in
		quit)	exit 0
		;;
		y|Y|yes|Yes|YES) 	autoconf
		;;
		*) 	true	
		;;
	esac

	cat << EOF
What method of connecting to the remote host would you like to use?
  1. VNC
  2. Query
  3. Broadcast
EOF

	getanswer
	method=$answer

	case $method in
		1|Vnc|VNC) method="vnc"
		;;
		2|Query|QUERY) method="query"
		;;
		3|Broadcast|BROADCAST) method="broadcast"
		;;
		*) echo "Invalid Selection"
		;;
	esac

	echo "ifconfig -a shows the following devices:"
	ifconfig -a
	echo "Which device would you like to use"
	getanswer
	device=$answer

	while [ $moveon -ne "1" ]; do
		echo "Enter Remote IP Address"
		getanswer
		moveon = `isip answer`
	done
	moveon=0

	while [ $moveon -ne "1" ]; do
		echo "Enter Local IP Address"
        	getanswer
		moveon = `isip answer`
	done
	moveon=0

	ifconfig $device $local 
        ip=` route -n | tail -1 | awk ' { print $2 } '`
        num=`ping  -c 4 $ip | wc -l` 
}
################## AUTO CONF
function autoconf() {
	echo "This is just a stub now...automatic configuration is not programmed yet."
}

function defaultconf() {
	findvalue remote  && remote=findvar;
	findvalue local   && local=findvar;
	findvalue device  && device=findvar;
	findvalue gateway && gateway=findvar;
	findvalue netmask && netmask=findvar;
	
	echo "Setting local IP address to "$local" on "$device"."
	ifconfig     $device $local netmask $netmask
	echo "Setting gateway to "$gateway"."
	route delete default eth0
	route add    default $gateway
}

function remoteip() {
	echo "Verifying remote IP address..."
      	num=`ping -c 5 $remote | wc -l`
	if [ $num -ne "9" ]; then
		echo "There was an error contacting the remote IP address."
		while [ $moveon -ne "1" ]; do
			echo "Enter Remote IP Address"
			getanswer
			moveon=`isip $answer`
		done
	fi
}
remoteip
function findvalue() {
	findvar=`cat /etc/remoteinfo | grep -v "#" | grep $1 | awk ' { print $2 } '`
} 

function gwtest() {
	echo "Verifying Gateway..."
	
	while [ $num -ne "9" ]; do 
		echo -n "Gateway isn't working." 
		
		while [ $moveon -ne "1" ]; do
			echo "Please enter gateway address"
			getanswer
	 		moveon=`isip $answer`
		done
		moveon=0

		route delete gw eth0
		route add default gw $ip
        	ip=`route -n | tail -1 | awk ' { print $2 } '`
        	num=`ping -c 4 $ip | wc -l`
	done	
}

cat << EOF
What would you like to do? 
   1. Connect Remotely  
   2. Login             
EOF

getanswer
[ $answer == "2" ] && exit 0

cat /etc/remoteinfo
echo -n "Use these values" 
getanswer

case $answer in
	y|Y|yes|Yes|YES) 	defaultconf
				;;
	n|N|no|No|NO)		echo hi;manualconf
				;;
	*)	echo "I couldn't figure out your answer so I will quit the program and give you a login screen."
		exit 0
		;;
esac

gwtest

cat << EOF
Remote IP = $remote
Local IP  = $local
Device	  = $device
Gateway   = $gateway
Netmask   = $netmask
All configuration complete.
Would you like to write the information to /etc/remoteinfo
EOF

getanswer

case $answer in
	y|Y|yes|Yes|YES) cat /etc/remoteinfo | grep # > /tmp/remote
		 	 cat >> /tmp/remote << EOF
remote=$remote
local=$local
device=$device
gateway=$gateway
netmask=$netmask
			EOF
			mv /tmp/remote /etc/remoteinfo
	;;
	*)
	;;
esac
		
echo "Would you like to continue"
getanswer
case $answer in
	y|Y|yes|YES|Yes)
	;;
	*) exit 0
	;;
esac