#!/bin/sh
##############################
# ************************************************************
# AltEPG Project Source Code Version Control
# $FileID: git::root/sbin/nic_config_tivo $
# $Revision: altepg1.0c root 2011-09-17 23:39:32 +0100 Finalising altepg1.0c $
# Description: nic configuration script
# ************************************************************
#
# nic_config_tivo: Read /etc/oztivo.conf, allow user to change it,
# write it back and also write /etc/rc.d/rc.net.
# Written by Warren Toomey, wkt@tuhs.org
# based on code by Simon Quigley, squigley@nyip.net
# Some edits and corrections by petestrash
# Further revisions by UK AltEPG project
#
# $Revision: altepg1.0c root 2011-09-17 23:39:32 +0100 Finalising altepg1.0c $
#
##############################
Version="unconfigured"
#
# Settings file to store the configuration from the menu
settings="/etc/oztivo.conf"
tmpsettings="/tmp/oztivo.conf"
# dhclient.conf (dhcp hostname)
dhclient="/etc/dhclient.conf"
# modem settings:
# modem config file
tclient="/etc/tclient.conf"
# modem dialup files
chapsec="/etc/chap-secrets"
papsec="/etc/pap-secrets"
pppops="/etc/ppp-options"
# dialconfig number
dialconfig=127

# These are the variables written out to the $settings file
# and their default settings
nic=Auto
ip=DHCP
mac=00:0B:AD:10:10:10
timing=16
hostname=altepgtivo
emulator=194.1.151.205
emulatorport=80
netmask=255.255.255.0
gateway=
ssid=
wep=
wepkey=

# Other variables
device=""			# If set, we're running on the install CD
rootpart=4 			# active root partition, eg /dev/hda4
mountpoint=/mnt/tivo 		# Where to mount the tivo disk if install CD
backtitle="AltEPG TiVo Network Configuration altepg1.0c" # Menu title
updated=""

# External Programs: need to change when running on CD
dialog=/devbin/dialog
mkdir=/bin/mkdir
mount=/bin/mount
umount=/bin/umount
hdparm="/sbin/hdparm -q"	# hdparm enable/disable dma
reread="/tivobin/reread" 	# reread util, workaround for DMA 
				# disable/byteswap enable issues

##############################
#
# display a fatal message to the user
#
fatal()
{
  $dialog --backtitle "$backtitle"  --title "Fatal Error" --clear --msgbox \
  "\n                         Error!\n\nThe installation program has suffered this fatal error:\n\n$1\n\nThe installer will now exit. Please visit http://www.altepg.com/forum and provide details of the error." 17 60
  rm -f /tmp/*.$$
  $dialog --clear; stty sane; exit 1
}

#
# choose a random MAC address
#
random_macaddr()
{
  mac1=`expr '(' $RANDOM '%' 90 ')' + 10`
  xyx=$RANDOM; xyx=$RANDOM; xyx=$RANDOM;
  mac2=`expr '(' $RANDOM '%' 90 ')' + 10`
  xyx=$RANDOM; xyx=$RANDOM; xyx=$RANDOM;
  mac3=`expr '(' $RANDOM '%' 90 ')' + 10`
  mac="00:0B:AD:$mac1:$mac2:$mac3"
}

#
# send warning about SiliconDust installer
cachecard_warning()
{
  $dialog --backtitle "$backtitle"  --title "Cachecard Warning" --msgbox \
  "\n                        Warning!\n\nIf at some point in the future you decide to change to a Turbonet (or Equivalent) or Cachecard, do NOT use the Silicondust installer as it will damage the image on your disk and may not be easily recoverable. YOU HAVE BEEN WARNED !!!\n\nIf at some point in the future you wish to change your networking options, then please do so using this installer." 17 60
}

#
# Write the $settings file
#
write_settings()
{
  echo "# AltEPG TiVo menu configuration settings file altepg1.0c" > $tmpsettings || \
					fatal "Could not write to $tmpsettings"
  echo "# Please do not edit this file"                     >> $tmpsettings
  echo "# Run the nic_config_tivo tool to reconfigure" >> $tmpsettings
  echo "nic=$nic"                   >> $tmpsettings
  echo "ip=$ip"                     >> $tmpsettings
  echo "mac=$mac"                   >> $tmpsettings
  echo "timing=$timing"             >> $tmpsettings
  echo "hostname=$hostname"         >> $tmpsettings
  echo "emulator=$emulator"         >> $tmpsettings
  echo "emulatorport=$emulatorport" >> $tmpsettings
  echo "netmask=$netmask"           >> $tmpsettings
  echo "gateway=$gateway"           >> $tmpsettings
  echo "ssid=$ssid"                 >> $tmpsettings
  echo "wep=$wep"                   >> $tmpsettings
  echo "wepkey=$wepkey"             >> $tmpsettings
  cp $tmpsettings $settings || fatal "Could not copy $tmpsettings to $settings"
  rm -f $tmpsettings
  updated="yes"
}

#
##############################
# Mounts the first selected device.
# No functionality for mounting second device, but shouldn't need to
#
mount_disk()
{
  # get the byteswapping current setting
  byteswap=`grep bswap /proc/ide/$device/settings|awk '{ print $2 }'`

  if [ "$byteswap" -ne "1" ]; then
    # not byteswapped. eek.
    # tell the user to pass the kernel parameter, hope it works.
    $dialog --backtitle "$backtitle" --title "Error" --msgbox \
      "Unable to mount /dev/$device.\n\nByteswapping is not enabled on this device.\n\nReboot, and specify \"knoppix $device=swapdata\" at the \"kernel:\" prompt" 10 75
    $dialog --clear; stty sane; exit 1
  fi

  # we're ok to mount it
  # check the mount point exists
  if [ ! -d $mountpoint ]; then
    $mkdir -p $mountpoint
    if [ ! -d $mountpoint ]; then
      # unable to make the directory
      fatal "Unable to create mount point directory $mountpoint."
    fi
  fi

  # make sure DMA and write caching are disabled
  $hdparm -d0 -W0 /dev/$device

  # reread the partition table, in case of dodgy kernel parameter handling
  $reread $device || fatal "$reread $device failed"

  # now mount the device, with caching disabled	
  $mount -o sync /dev/$device$rootpart $mountpoint 2>&1 >/tmp/mount

  if [ "$?" == "0" ]; then
    # mount executed successfully
    # check for the oztivo.conf file
    if [ ! -s "$settings" ]; then
      # no file, create basic one
      write_settings
      sync; sync
    fi
  else
    # an error occured mounting. eek.
    fatal "An error occurred mounting the device:\n`cat /tmp/mount`"
  fi
}

##############################
#
# Unmounts the selected device
umount_disk()
{
  # flush the cache (even though mounted in sync mode)
  sync; sync; sync

  # Get hdparm to flush the on-drive cache
  $hdparm -f /dev/$device

  # now unmount
  $umount $mountpoint || fatal "Unable to unmount $mountpoint"
}

#
# Enable device: either sets disk rw, or mounts it
enable_device()
{
  if [ -z $device  ]; then
    /hack/bin/makerw.sh
  else
    mount_disk
  fi
}

#
# Disable device: either sets disk ro, or unmounts it
disable_device()
{
  if [ -z $device ]; then
    /hack/bin/makero.sh
  else
    umount_disk
  fi
}

#
# Display the current oztivo.conf
#
view_net_conf()
{
  if [ "$updated" == "yes" ]; then
    # tell user the config has been changed
    $dialog --backtitle "$backtitle" --title "Configuration Changed" \
	--msgbox "The network configuration has been changed.\nThe following screen will show the new configuration.\nVerify it is correct.\n(Use the left/right arrows to scroll)" 10 60
    # reset the updated variable so we don't see this dialog again (unless the user updates something else)
    updated=""
  fi

  # display file
  $dialog --backtitle "$backtitle" --title "oztivo.conf" --textbox $settings 20 60
}


##############################
#
pppondss_conf()
# configures the tivo to run PPP on the serial port
{
  write_settings
  # tell user the config has been changed
  $dialog --backtitle "$backtitle" --title "Configuration Changed" --msgbox \
  "The network configuration has been changed.\nPPP on the serial port is now ENABLED\nand bash on the serial port is DISABLED. PPP will run at 57600 bps." 10 60
}

##############################
#
modem_conf()
{
  # tell the user that modem dialups are not supported
  $dialog --yesno "Using the internal modem is subject to the Alt DUN Service being in operation. If you choose this option, and it doesn't work, then you will need to buy a network card.\n\nAre you sure that you want to use the internal modem?" 12 60

  # user bailed out
  if [ "$?" -ne "0" ]; then return; fi

  # ask for the phone number
  get_phone
  if [ ! -z "$abort" ]; then return; fi

  # ask for the username
  get_username
  if [ ! -z "$abort" ]; then return; fi

  # ask for the password (hide the password as it's entered? do we care?)
  # don't care -ed
  get_password
  if [ ! -z "$abort" ]; then return; fi

  # write the new config for tclient
  echo "$dialconfig:$phone:127.0.0.1:8000:$username:$password:" \
			> $tclient || fatal "Cannot write to $tclient"

  # wallop the chap/pap secrets files with the currently entered password
  echo -e "*\t*\t$password" > $chapsec || fatal "Cannot write to $chapsec"
  echo -e "*\t*\t$password" > $papsec || fatal "Cannot write to $papsec"

  # replace the username in the ppp-options file
  if [ -n "`grep ^user $pppops`" ]; then
    # change setting
    cat $pppops | sed "s/^user.*/user $username/" > $pppops.tmp || \
				fatal "Cannot update $pppops"
    mv -f $pppops.tmp $pppops

  else
    echo "user $username" >> $pppops || fatal "Cannot append to $pppops"
  fi
	
  # change the config in the settings file
  write_settings

  # display the new config file
  $dialog --backtitle "$backtitle" --title "Configuration Changed" --msgbox \
  "The dialup configuration has been changed.\nThe following screen will show the new configuration.\nVerify it is correct.\n(Use the left/right arrows to scroll)" 10 60
  $dialog --backtitle "$backtitle" --title "tclient.conf" --textbox $tclient 10 60
}

##############################
#
# Display form to get IP address for NIC. No default, ie DHCP mode
get_ip()
{
  defip=$ip
  if [ "$defip" == "DHCP" ]; then defip=""; fi

  $dialog --backtitle "$backtitle" --title "IP Address/DHCP" --nocancel \
    --inputbox "Enter IP Address.\nLeave null for DHCP." 10 40 $defip \
						2> /tmp/ipaddress.$$
  if [ "$?" == "0" ]; then
    ip=`cat /tmp/ipaddress.$$`
    rm /tmp/ipaddress.$$
    if [ -z "$ip" ]; then
	# no IP entered, DHCP mode, display message
	ip="DHCP"
	$dialog --backtitle "$backtitle" --title "DHCP" --msgbox \
	"By not entering an IP address, you have set DHCP mode active." 10 60
    else
	# static ip entered, display message
	$dialog --backtitle "$backtitle" --title "Static IP" --msgbox \
	"By entering an IP address, you have set static IP mode." 10 60
    fi
  else
    abort="yes"
  fi
}

##############################
#
# Asks the user for the MAC address to use, or construct a random one
#
get_mac()
{
  # user did aborted entering an IP
  if [ ! -z "$abort" ]; then return; fi

  $dialog --backtitle "$backtitle" --title "MAC Address" --nocancel \
   --inputbox "Enter the full MAC Address to use.\nYou must change this if you are running multiple TiVos." 10 50 $mac 2>/tmp/macaddress.$$
  if [ "$?" == "0" ]; then
    mac=`cat /tmp/macaddress.$$`
    rm /tmp/macaddress.$$
    if [ -z "$mac" ]; then
	# no MAC entered, ask user again
	get_mac
    fi
  else
    abort="yes"
  fi
}

###################################
# Get timing for the turbonet card
get_timing()
{
  if [ ! -z "$abort" ]; then return; fi
  $dialog --clear --backtitle "$backtitle" --title "Turbonet Timing Value" \
    --menu "Enter the timing parameter you would like.\n\n[Up][Down] to move\n[Enter] to select option." \
    10 60 0 \
    "3"     "Optimal timing" \
    "4"     "Normal timing" \
    "16"    "Failsafe timing" \
     2> /tmp/timing.$$

  if [ "$?" == "0" ]; then
    timing=`cat /tmp/timing.$$`
    rm /tmp/timing.$$
    if [ -z "$timing" ]; then
        # no value entered, ask again
        get_timing
    fi
  else
    abort="yes"
  fi
}

##############################
#
# Asks the user for the subnet mask to use, 255.255.255.0 (class C) is default
get_netmask()
{
  # user did aborted entering an IP or MAC
  if [ ! -z "$abort" ]; then return; fi
  defmask=$netmask
  if [ -z "$defaultmask" ]; then defmask="255.255.255.0"; fi
  $dialog --backtitle "$backtitle" --title "Subnet Mask" --nocancel --inputbox \
      "Enter subnet mask to use." 10 40 $defmask 2>/tmp/netmask.$$
  if [ "$?" == "0" ]; then
    netmask=`cat /tmp/netmask.$$`
    rm /tmp/netmask.$$
    if [ -z "$netmask" ]; then
	# no subnet mask entered, ask the user again
	get_netmask
    fi
  else
    abort="yes"
  fi
}

##############################
#
# Asks the user for the gateway ip/default route to use, 192.168.1.249 is default 
get_gateway()
{
  # user did aborted entering an IP or MAC or mask
  if [ ! -z "$abort" ]; then return; fi
  defgateway=$gateway
  if [ -z "$defgateway" ]; then defgateway="192.168.1.249"; fi
  $dialog --backtitle "$backtitle" --title "Gateway IP" --nocancel --inputbox \
    "Enter gateway IP address / default route to use." 10 40 $defgateway \
							2>/tmp/gateway.$$
  if [ "$?" == "0" ]; then
    gateway=`cat /tmp/gateway.$$`
    rm /tmp/gateway.$$
    if [ -z "$gateway" ]; then
      # no gateway / default route entered, ask the user again
      get_gateway
    fi
    if [ "$gateway" = "$ip" ]; then
      $dialog --msgbox "The IP address of your default gateway has to be different to the IP address that you gave to your router, $ip. Please re-enter the gateway address." 8 60
      get_gateway
    fi
  else
    abort="yes"
  fi
}

##############################
#
# User is in DHCP mode, ask them for the hostname to send to the DHCP server.
# If it supports DNS, oztivo is default
get_hostname()
{
  # user did aborted entering an IP or MAC or mask or gateway
  if [ ! -z "$abort" ]; then return; fi
  defhostname=$hostname
  if [ -z "$defhostname" ]; then defhostname="altepgtivo"; fi
  $dialog --backtitle "$backtitle" --title "DHCP Hostname" --nocancel \
    --inputbox "Enter DHCP hostname to use.\nNot all DHCP servers support this\n(they will just ignore it).\nModify this if you have multiple TiVos." \
                                       12 50 $defhostname 2>/tmp/hostname.$$
  if [ "$?" == "0" ]; then
    hostname=`cat /tmp/hostname.$$`
    rm /tmp/hostname.$$
    if [ -z "$hostname" ]; then
	# no hostname entered, ask again
	get_hostname
    fi
  else
    abort="yes"
  fi
}

##############################
#
# Display form to get SSID to connect to
get_SSID()
{
  # user aborted entering an IP
  if [ ! -z "$abort" ]; then return; fi
  defSSID=$ssid
  if [ -z "$defSSID" ]; then defSSID="default"; fi

  $dialog --backtitle "$backtitle" --title "SSID" --nocancel --inputbox \
     "Enter the SSID to connect to." 10 40 $defSSID 2>/tmp/ssid.$$
  if [ "$?" == "0" ]; then
    ssid=`cat /tmp/ssid.$$`
    rm /tmp/ssid.$$
    if [ -z "$ssid" ]; then
	# no SSID entered, ask again.
	get_SSID
    fi
  else
    abort="yes"
  fi
}

##############################
#
# Display form to get encryption level settings
get_WEP()
{
  # user aborted entering an IP
  if [ ! -z "$abort" ]; then return; fi

  $dialog --backtitle "$backtitle" --title "WEP Encryption" --nocancel \
	--menu "Select WEP Encyption level." 10 40 0 \
	"None" 	"No Encryption" \
	"64" 	"64 Bit Encyption" \
	"128" 	"128 Bit Encyption" 2>/tmp/wep.$$

  if [ "$?" == "0" ]; then
    wep=`cat /tmp/wep.$$`
    rm /tmp/wep.$$
    if [ "$wep" != "None" ]; then
	get_wepkey
    fi
  else
    abort="yes"
  fi
}

##############################
#
# User has selected 64/128 bit encryption, need to get key
get_wepkey()
{
  $dialog --backtitle "$backtitle" --title "WEP Key" --nocancel \
    --inputbox "Enter the $wep bit WEP key." 10 60 $WEPkey 2>/tmp/WEPkey.$$
  if [ "$?" == "0" ]; then
    wepkey=`cat /tmp/WEPkey.$$`
    rm /tmp/WEPkey.$$
    keylength=`echo $wepkey |wc -L |awk '{ print $1 }'`
    if [ "$wep" == "64" ]; then
      if [ "$keylength" -lt "10" ]; then
	# too short, display error
	$dialog --backtitle "$backtitle" --title "Error" --msgbox \
	  "The WEP key entered was too short.\n64 bit keys must be 10 characters long.\nPlease check it." 10 60
	# ask again
	get_wepkey
      elif [ "keylength" -gt "10" ]; then
	# too long, display error
	$dialog --backtitle "$backtitle" --title "Error" --msgbox \
	  "The WEP key entered was too long.\n64 bit keys must be 10 characters long.\nPlease check it." 10 60
	# ask again
	get_wepkey
      fi
    elif [ "$wep" == "128" ]; then
      if [ "$keylength" -lt "26" ]; then
	# too short, display error
	$dialog --backtitle "$backtitle" --title "Error" --msgbox \
	  "The WEP key entered was too short.\n128 bit keys must be 26 characters long.\nPlease check it." 10 60
	# ask again
	get_wepkey
      elif [ "keylength" -gt "26" ]; then
	# too long, display error
	$dialog --backtitle "$backtitle" --title "Error" --msgbox \
	  "The WEP key entered was too long.\n128 bit keys must be 26 characters long.\nPlease check it." 10 60
	# ask again
	get_wepkey
      fi
    fi
  else
    abort="yes"
  fi
}

##############################
#
# Get the ISP's phone number
get_phone()
{
  defphone=$phone

  $dialog --backtitle "$backtitle" --title "Dialup Number" --nocancel \
    --inputbox "Enter ISP's Dialup number" 10 40 $defphone 2>/tmp/phone.$$
  if [ "$?" == "0" ]; then
    phone=`cat /tmp/phone.$$`
    rm /tmp/phone.$$
    # (if number too short/long.. too bad. User can learn to type.)
    if [ -z "$phone" ]; then
      # no phone number entered, ask again
      get_phone
    fi
  else
    abort="yes"
  fi
}

##############################
#
# Get the user's ISP username
get_username()
{
defusername=`grep ^username= $settings| cut -f 2 -d "="`

$dialog --backtitle "$backtitle" --title "Dialup Username" --nocancel --inputbox "Enter the username required to connect to your ISP" 10 40 $defusername 2>/tmp/username
if [ "$?" == "0" ]; then
	username=`cat /tmp/username`
	rm /tmp/username
	if [ -z "$username" ]; then
		# no username entered. I've never heard of an ISP not requiring a username (HTF would that work?). Ask again..
		get_username
	fi
else
	abort="yes"
fi
}

##############################
#
get_password()
# get the user's ISP password
{
  defpassword=$password
  $dialog --backtitle "$backtitle" --title "Dialup Password" --nocancel \
    --inputbox "Enter the password required to connect to your ISP" 10 40 \
    				$defpassword 2>/tmp/password.$$
  if [ "$?" == "0" ]; then
    password=`cat /tmp/password.$$`
    rm /tmp/password.$$
    if [ -z "$password" ]; then
      # No password entered. I've never heard of an ISP not requiring a
      # password. Ask again..
      get_password
    fi
  else
    abort="yes"
  fi
}

##############################
#
build_net_conf()
# builds the oztivo.conf file based on the user's input
{
  # get all the necessary settings from the user to setup an appropriate nic:
  # Static IP/DHCP
  # MAC address
  # Subnet Mask (static IP)
  # Default Route (static IP)
  # hostname (DHCP)
  # SSID (airnet)
  # Encryption (level/key) (airnet)

  # get IP address first/DHCP mode
  get_ip

  if [ "$nic" == "TurboNet" -o "$nic" == "Cachecard" ]; then
	# get MAC address
	get_mac
  fi
  if [ "$nic" == "TurboNet" ]; then
	# get timing
	get_timing
  fi

  if [ "$ip" != "DHCP" ]; then
	# user set a static IP
	# get subnet mask
	get_netmask

	# get gateway/default route
	get_gateway
  else
	# DHCP mode
	# get DHCP hostname
	get_hostname
	netmask=""
	gateway=""
  fi

  if [ "$nic" == "AirNet" ]; then
	# get the SSID to connect to
	get_SSID
	# get encryption settings
	get_WEP
  else
	ssid=""
        wep=""
	wepkey=""
  fi

  # Save the file
  write_settings
}

##############################
#
# Ask user what guide data emulator to use
emu_conf()
{
  # ask the user for emu address
  get_emu

  # user aborted selecting/entering emulator address
  if [ ! -z "$abort" ]; then return; fi

  if [ "$emulator" == "194.1.151.205" ]; then
    # must be running on port 80
    emulatorport="80"
  else
    # get the port to use
    get_emu_port
  fi		
  # Save the file
  write_settings
}

##############################
#
# Ask user to select what guide data emulator to use
get_emu()
{
  # ask what emulator to use
  $dialog --backtitle "$backtitle" --title "Select emulator" --menu \
        "[Up][Down] to move\n[Enter] to select" 10 60 0 \
        "194.1.151.205"    "Use 194.1.151.205, the UK emulator" \
	"www.oztivo.net"     "Use www.oztivo.net, the OZ emulator" \
	"hydra.demon.nl"     "Use hydra.demon.nl, The Netherlands emulator" \
        "other"   "Enter emulator IP/address manually" 2>/tmp/emulator.$$

	# add more emulators above other

  if [ "$?" == "0" ]; then
    # user did not cancel
    emulator=`cat /tmp/emulator.$$`
    rm -f /tmp/emulator.$$

    # work out what to do
    if [ "$emulator" == "other" ]; then
      # ask the user to enter the ip/address
      get_other_emu
    fi
  else
    abort="yes"
  fi
}

##############################
#
# Ask user to enter what guide data emulator to use
get_other_emu()
{
  defemu=$emulator

  $dialog --backtitle "$backtitle" --title "Emulator IP/Address" --nocancel \
   --inputbox "Enter Emulator IP or Address." 10 40 $defemu 2>/tmp/emuaddress.$$
  if [ "$?" == "0" ]; then
    emulator=`cat /tmp/emuaddress.$$`
    rm -f /tmp/emuaddress.$$
    if [ -z "$emulator" ]; then
      # no address entered, error, ask again
      get_other_emu
    fi
  else
    abort="yes"
  fi
}

##############################
#
# Ask user to enter the guide data emulator port
get_emu_port()
{
  defport=$emulatorport

  $dialog --backtitle "$backtitle" --title "Emulator Port" --nocancel \
    --inputbox "Enter Emulator Port.\nMost are 80 or 8000" 10 40 \
						$defport 2>/tmp/emuport.$$
  if [ "$?" == "0" ]; then
    emulatorport=`cat /tmp/emuport.$$`
    rm -f /tmp/emuport.$$
    if [ -z "$emulatorport" ]; then
      # no port entered, error, ask again
      get_emu_port
    fi
  else
   abort="yes"
  fi
}

#
# Perform network configuration on the $settings file
net_conf()
{
  # display menu for user to choose NIC
  $dialog --clear --backtitle "$backtitle" --title "Select NIC to Install" \
		--menu "[Up][Down] to move\n[Enter] to select option" 10 60 0 \
	"Auto"		"Auto-sense the NIC" \
	"TurboNet" 	"100Mbit Wired NIC" \
	"Cachecard" 	"100Mbit Wired NIC + Optional RAM" \
	"AirNet" 	"11Mbit Wireless NIC" \
	"TiVoNet" 	"10Mbit Wired NIC (ISA Card) (not common)" \
	"PPPonDSS" 	"PPP on the Serial Port" \
	"Modem" 	"Dialup using built in modem" \
	"Emulator"      "Select the guide server to use" \
	"View" 		"Display Current Configuration File" \
	"Exit"		"Exit Network Configuration" 2>/tmp/nic2install.$$

  if [ "$?" == "0" ]; then
    # user did not cancel
    cmd=`cat /tmp/nic2install.$$`
    rm -f /tmp/nic2install.$$

    case $cmd in
	View) 	view_net_conf
		# show the network menu again
		net_conf
		;;
	Auto)
		nic=$cmd
		build_net_conf
		cachecard_warning
		;;
	TurboNet)
		nic=$cmd
		build_net_conf
		cachecard_warning
		;;
	Cachecard)
		nic=$cmd
		build_net_conf
		cachecard_warning
		;;
	AirNet) nic=$cmd
		build_net_conf
		cachecard_warning
		;;
	TiVoNet)
		nic=$cmd
		build_net_conf
		cachecard_warning
		;;
	PPPonDSS)
		nic=$cmd
		pppondss_conf
		cachecard_warning
		;;
	Modem)  nic=$cmd
	        modem_conf
		cachecard_warning
		;;
        Emulator) emu_conf
		;;
	Exit)   disable_device; $dialog --clear; stty sane; exit 0
		;;
	esac
  else disable_device; $dialog --clear; stty sane; exit 0
  fi
}
##############################
#       MAIN PROGRAM
##############################
# Make a random MAC address
random_macaddr
# Get any device named as $1
if [ $# = 1 ]; then
  # Check that we are running on the CD
  if [ ! -d /cdrom/KNOPPIX ]; then
    fatal "This program is not running on the CD, so you cannot supply the $1 argument."
  fi
  device=$1
  settings="$mountpoint/etc/oztivo.conf"
  dhclient="$mountpoint/etc/dhclient.conf"
  tclient="$mountpoint/etc/tclient.conf"
  chapsec="$mountpoint/etc/chap-secrets"
  papsec="$mountpoint/etc/pap-secrets"
  pppops="$mountpoint/etc/ppp-options"
  dialog="/usr/bin/dialog"
else
  # Check that we are not running on the CD
  if [ -d /cdrom/KNOPPIX ]; then
    dialog="/usr/bin/dialog"
    fatal "This program is running on the CD, you must supply the name of the device where the Linux partition was created, e.g. $0 hda"
  fi
fi

# Make the device read/write
enable_device

# Create a default file if it doesn't exist
if [ ! -f $settings -o ! -s $settings ]; then write_settings; fi
updated=""

# Load the existing values, give the main menu
source $settings
while true; do abort=""; net_conf; done
disable_device
$dialog --clear; stty sane
exit 0