#!/bin/sh
# This script will be called with the single argument of "boot" during the
# system startup, to allow for unattended network configuration.
# For this to work, all required information must be passed on the commandline.
# Two parameters, 'kbd=' and 'nic=' must be used to supply this information.
# kbd=<keyboard_layout>
# nic=<driver>:<interface>:<dhcp|static>[:ipaddr:netmask[:gateway]]
export TEXTDOMAIN=slint
. gettext.sh
TMP=/var/log/setup/tmp
if [ ! -d $TMP ]; then
 mkdir -p $TMP
fi
# Terminate the script now if we have an interface with an IP address:
# Running the script is not needed anymore in that case.
if `ip -f inet -o addr show | grep -v " lo " 1>/dev/null 2>/dev/null` ; then
  exit 0
fi

# Function to convert the netmask from CIDR format to dot notation.
cidr_cvt() {
  inform=$1
  if   [ $inform -ge 32 ]; then outform='255.255.255.255'
  elif [ $inform -ge 31 ]; then outform='255.255.255.254'
  elif [ $inform -ge 30 ]; then outform='255.255.255.252'
  elif [ $inform -ge 29 ]; then outform='255.255.255.248'
  elif [ $inform -ge 28 ]; then outform='255.255.255.240'
  elif [ $inform -ge 27 ]; then outform='255.255.255.224'
  elif [ $inform -ge 26 ]; then outform='255.255.255.192'
  elif [ $inform -ge 25 ]; then outform='255.255.255.128'
  elif [ $inform -ge 24 ]; then outform='255.255.255.0'
  elif [ $inform -ge 23 ]; then outform='255.255.254.0'
  elif [ $inform -ge 22 ]; then outform='255.255.252.0'
  elif [ $inform -ge 21 ]; then outform='255.255.248.0'
  elif [ $inform -ge 20 ]; then outform='255.255.240.0'
  elif [ $inform -ge 19 ]; then outform='255.255.224.0'
  elif [ $inform -ge 18 ]; then outform='255.255.192.0'
  elif [ $inform -ge 17 ]; then outform='255.255.128.0'
  elif [ $inform -ge 16 ]; then outform='255.255.0.0'
  elif [ $inform -ge 15 ]; then outform='255.254.0.0'
  elif [ $inform -ge 14 ]; then outform='255.252.0.0'
  elif [ $inform -ge 13 ]; then outform='255.248.0.0'
  elif [ $inform -ge 12 ]; then outform='255.240.0.0'
  elif [ $inform -ge 11 ]; then outform='255.224.0.0'
  elif [ $inform -ge 10 ]; then outform='255.192.0.0'
  elif [ $inform -ge 9 ]; then outform='255.128.0.0'
  elif [ $inform -ge 8 ]; then outform='255.0.0.0'
  elif [ $inform -ge 7 ]; then outform='254.0.0.0'
  elif [ $inform -ge 6 ]; then outform='252.0.0.0'
  elif [ $inform -ge 5 ]; then outform='248.0.0.0'
  elif [ $inform -ge 4 ]; then outform='240.0.0.0'
  elif [ $inform -ge 3 ]; then outform='224.0.0.0'
  elif [ $inform -ge 2 ]; then outform='192.0.0.0'
  elif [ $inform -ge 1 ]; then outform='128.0.0.0'
  elif [ $inform -ge 0 ]; then outform='0.0.0.0'
  fi
  echo $outform
}

# First, sane defaults:
INTERFACE=""
ENET_MODE="ask"
# Does the commandline have NIC information for us?
# Format is 'nic=driver:interface:<dhcp|static>:ip:mask:gw'
for CMDELEM in $(cat /proc/cmdline) ; do
 if $(echo $CMDELEM | grep -q "^nic=") ; then
  DRIVER=$(echo $CMDELEM | cut -f2 -d=)
  INTERFACE=$(echo $DRIVER | cut -f2 -d:)
  ENET_MODE=$(echo $DRIVER | cut -f3 -d:)
  if [ "$ENET_MODE" = "static" ]; then
   IPADDR=$(echo $DRIVER | cut -f4 -d:)
   NETMASK=$(echo $DRIVER | cut -f5 -d:)
   # We allow for CIDR notation of the netmask (0 < NETMASK < 25):
   if [ "$(echo $NETMASK | tr -cd '\.')" != "..." ]; then
    NETMASK=$(cidr_cvt $NETMASK)
   fi
   GATEWAY=$(echo $DRIVER | cut -f6 -d:)
  fi
  DRIVER=$(echo $DRIVER | cut -f1 -d:)
  break
 fi
done

# If the script has an argument of 'boot' then we require all information for
# unattended network setup or else we silently exit.
if [ "$1" = "boot" ]; then
  if [ "x$DRIVER" = "x" -o "x$INTERFACE" = "x" -o "$ENET_MODE" = "ask" ]; then
    exit 2
  elif [ "$ENET_MODE" = "static" ] && [ "x$IPADDR" = "x" -o "x$NETMASK" = "x" ]; then
    exit 2
  fi
fi

# If the cmdline provided the name of a driver, load it;
# Alternatively check if the user ran "network" before running "setup";
# We need an interface:
if [ `cat /proc/net/dev | grep ':' | sed -e "s/^ *//" | cut -f1 -d: | grep -v lo | wc -l` = 0 ]; then
  if [ "x${DRIVER}" != "x" ]; then
    # This takes silent care of 'DRIVER=auto' as well...
    modprobe ${DRIVER} 1>/dev/null 2>/dev/null
  else
    while [ 0 ]; do
      gettext "
You will now get a chance to probe your network interfaces.
" > $TMP/tempmsg 
      dialog --title "`gettext "PROBING NETWORK DEVICES"`" --msgbox "`cat $TMP/tempmsg`" 7 80
      rm -f $TMP/tempmsg
      clear
      /bin/network --installer
      read -p "Press any key..." JUNK
      sleep 5 # Give dhcpcd a change to probe
      unset JUNK
      gettext "
Are you OK with the network interface which was \
detected? If not, select 'No' to get back to the network probe program. \
You can try to load another driver explicitly, by using 'P <driver_name>'.

If you are satisfied, select 'Yes' to continue with network configuration." > $TMP/tempmsg
      dialog --title "` gettext "PROBING NETWORK DEVICES"`" --yesno "`cat $TMP/tempmsg`" 12 80
      if [ $? = 0 ]; then
        rm -f $TMP/tempmsg
        break
      fi
      clear
    done
  fi
fi

# If we obtained information from a DHCP server, use it:
if [ "x$INTERFACE" = "x" -o "$INTERFACE" = "auto" ]; then
 # the cmdline did not provide a nic or it's "auto" to let dhcpcd find out:
 if [ "$INTERFACE" = "auto" ]; then
  # hope that 3 seconds is enough for dhcpcd;
  # if not then you had better specify the INTERFACE in the nic= parameter...
  dialog --title "`gettext "INITIALIZING NETWORK"`" --infobox \
   "`gettext "
Waiting a few seconds for DHCP polling to settle ..."`" 5 80
  sleep 3
 fi
 clear
 for I_I in \
  $(cat /proc/net/dev | grep ':' | sed -e "s/^ *//" | cut -f1 -d: | grep -v lo) ;
 do
  if [ -s /etc/dhcpc/dhcpcd-${I_I}.info ]; then
    INTERFACE="${I_I}"
    break
  fi
 done
 unset I_I
 if [ "$INTERFACE" = "auto" ]; then  # failed to find a configured interface
  INTERFACE=""
 fi
fi

while [ 0 ]; do
 T_PX="`cat $TMP/SeTT_PX`"
 UPNRUN=1
 if [ "$T_PX" = "/" ]; then
gettext "You're running off the hard drive filesystem. Is this \
machine currently running on the network you plan to install from? If so, \
we won't try to reconfigure your ethernet card.

Are you up-and-running on the network?" > $TMP/tempmsg
  dialog --title "`gettext "NETWORK CONFIGURATION"`" --yesno "`cat $TMP/tempmsg`" 10 80
  UPNRUN=$?
  clear
 fi
 if [ $UPNRUN = 1 ]; then
  ENET_DEVICE=${INTERFACE:-"eth0"} 
  if [ "x$INTERFACE" != "x" ]; then # interface specified via cmdline or dhcpcd
   if [ "$ENET_MODE" = "ask" ]; then
    # Offer to install using DHCP:
eval_gettext "
I can configure your network interface \$ENET_DEVICE \
fully automatically using DHCP. If you want this, please select 'yes'.

If you select 'no' instead, then you will be able to assign \
the IP address, netmask and gateway manually.
" > $TMP/tempmsg
    dialog --title "`gettext "DHCP CONFIGURATION"`" --yesno "`cat $TMP/tempmsg`" 12 80
    if [ $? -eq 0 ]; then
     rm -f $TMP/tempmsg
     echo $ENET_DEVICE > $TMP/SeTdhcp
    else
     rm -f $TMP/SeTdhcp
    fi
   elif [ "$ENET_MODE" = "dhcp" ]; then # Don't ask, just use DHCP
    echo $ENET_DEVICE > $TMP/SeTdhcp
   fi
  fi # End non-empty INTERFACE 
  clear

  if [ ! -r $TMP/SeTdhcp ]; then
   # No DHCP configured, so use static IP.
   # If we have all the values ready, don't ask any.
   # Only if the script runs with the "boot" parameter will we silently accept
   # an empty gateway address (if we came this far, we will have IP/netmask):
   if [ "$1" = "boot" -a "x$GATEWAY" = "x" ]; then
    HAVE_GATEWAY=1
    GATEWAY="unspec"
   else
    HAVE_GATEWAY=0
   fi
   if [ "x$IPADDR" = "x" -o "x$NETMASK" = "x" -o "x$GATEWAY" = "x" ]; then
gettext "
You will need to enter the IP address you wish to \
assign to this machine. Example: 111.112.113.114

What is your IP address?" > $TMP/tempmsg
    if [ "$LOCAL_IPADDR" = "" ]; then # assign default
     LOCAL_IPADDR=${IPADDR}
    fi
    dialog --title "`gettext "ASSIGN IP ADDRESS"`" --inputbox "`cat $TMP/tempmsg`" 12 \
    80 $LOCAL_IPADDR 2> $TMP/local
    if [ ! $? = 0 ]; then
     rm -f $TMP/tempmsg $TMP/local
     exit
    fi
    LOCAL_IPADDR="`cat $TMP/local`"
    rm -f $TMP/local
    clear
gettext "
Now we need to know your netmask. \
Typically this will be 255.255.255.0 but this can be different depending on \
your local setup.

What is your netmask?" > $TMP/tempmsg
    if [ "$LOCAL_NETMASK" = "" ]; then # assign default
     LOCAL_NETMASK=${NETMASK:-255.255.255.0}
    fi
    dialog --title "`gettext "ASSIGN NETMASK"`" --inputbox "`cat $TMP/tempmsg`" 14 \
    80 $LOCAL_NETMASK 2> $TMP/mask
    if [ ! $? = 0 ]; then
     rm -f $TMP/tempmsg $TMP/mask
     exit
    fi
    clear
    LOCAL_NETMASK="`cat $TMP/mask`"
    rm $TMP/mask
    dialog --yesno "`gettext "Do you have a gateway?"`" 5 80
    HAVE_GATEWAY=$?
    clear
    if [ "$HAVE_GATEWAY" = "0" ]; then
     if [ "$LOCAL_GATEWAY" = "" ]; then
      if [ "$GATEWAY" = "" ]; then
       LOCAL_GATEWAY="`echo $LOCAL_IPADDR | cut -f1-3 -d '.'`."
      else
       LOCAL_GATEWAY=${GATEWAY}
      fi
     fi
     dialog --title "`gettext "ASSIGN GATEWAY ADDRESS"`" --inputbox \
     "`gettext "
What is the IP address for your gateway?"`" 9 80 \
     $LOCAL_GATEWAY 2> $TMP/gw
     if [ ! $? = 0 ]; then
      rm -f $TMP/tempmsg $TMP/gw
      exit
     fi
     LOCAL_GATEWAY="`cat $TMP/gw`"
     rm -f $TMP/gw
    fi
    clear
   else
    # Non-interactive run, so we use the values set on the commandline:
    LOCAL_IPADDR=${IPADDR}
    LOCAL_NETMASK=${NETMASK}
    LOCAL_GATEWAY=${GATEWAY}
   fi # end questions asked
  fi # end static ip

  if [ "$ENET_MODE" = "ask" -a ! -r $TMP/SeTdhcp ]; then
eval_gettext "
This is the proposed network configuration for \$ENET_DEVICE - \
If this is OK, then select 'Yes'.
If this is not OK and you want to configure again, select 'No'.

* IP Address: \$LOCAL_IPADDR
* Netmask:    \$LOCAL_NETMASK" > $TMP/tempmsg
echo >> $TMP/tempmsg
   if [ "$HAVE_GATEWAY" = 0 ]; then
    echo "* Gateway:    $LOCAL_GATEWAY" >> $TMP/tempmsg
   fi 
   echo "" >> $TMP/tempmsg
   dialog --no-collapse --title "`gettext "NETWORK CONFIGURATION"`" --yesno "`cat $TMP/tempmsg`" 14 80
   if [ $? -eq 1 ]; then
    continue # New round of questions
   fi
  fi # end ask approval for ip config

  #echo "Configuring ethernet card..."
  dialog --title "`gettext "INITIALIZING NETWORK"`" --infobox \
  "`eval_gettext "
Configuring your network interface \\\$ENET_DEVICE ..."`" 5 80
  if [ -r $TMP/SeTdhcp ]; then
   dhcpcd -k $ENET_DEVICE 1>/dev/null 2>&1 # Or else the '-T' will be used next:
   sleep 3
   dhcpcd -L $ENET_DEVICE
  else
   dhcpcd -k $ENET_DEVICE 1>/dev/null 2>&1 # We don't need it now
   # Broadcast and network are derived from IP and netmask:
   LOCAL_BROADCAST=`ipmask $LOCAL_NETMASK $LOCAL_IPADDR | cut -f 1 -d ' '`
   LOCAL_NETWORK=`ipmask $LOCAL_NETMASK $LOCAL_IPADDR | cut -f 2 -d ' '`
   ifconfig $ENET_DEVICE $LOCAL_IPADDR netmask $LOCAL_NETMASK broadcast $LOCAL_BROADCAST
   if [ "$HAVE_GATEWAY" = "0" ]; then
    #echo "Configuring your gateway..."
    route add default gw $LOCAL_GATEWAY metric 1
   fi
   echo $LOCAL_IPADDR > $TMP/SeTIP
   echo $LOCAL_NETMASK > $TMP/SeTnetmask
   echo $LOCAL_GATEWAY > $TMP/SeTgateway
  fi
 fi # ! UPNRUN
 clear
 break

done
echo $UPNRUN > $TMP/SeTupnrun

# Basic initialisation completed. Let's see what the commandline has for us:
# If we know of a remote configuration file, get it now:
# Provide comma-separated values (protocol,remoteserver[:portnumber],configfile)
# like this example: 'cf=tftp,192.168.0.22,/slint-12.1/configs/t43.cfg'
for CMDELEM in $(cat /proc/cmdline) ; do
 if $(echo $CMDELEM | grep -q "^cf=") ; then
  CONFIGFILE=$(echo $CMDELEM | cut -f2 -d=)
  PROTO=$(echo $CONFIGFILE | cut -f1 -d,)
  DLSERVER=$(echo $CONFIGFILE | cut -f2 -d,)
  CONFIGFILE=$(echo $CONFIGFILE | cut -f3 -d,)
  dialog --title "`gettext "FETCHING CONFIGURATION"`" --infobox \
   "`eval_gettext "
Attempting to fetch a remote configuration file using \\\$PROTO ..."`" 54 80
 fi
done

if [ -n "$CONFIGFILE" ]; then
 if [ "$PROTO" = "tftp" ]; then
  tftp -g -r $CONFIGFILE -l $TMP/Punattended $DLSERVER 1>/dev/null 2>&1
 elif [ "$PROTO" = "ftp" -o "$PROTO" = "http" ]; then
  wget -q -P $TMP -O Punattended ${PROTO}://${DLSERVER}${CONFIGFILE}
 fi
fi

# Clear the screen, since it looks pretty messy due to some fun with the termcap
# over a serial console.
clear