#!/bin/sh
#
#	netconf 0.1 - Configure network	
#
# Changes:
#						

LOCALRC=/usr/etc/rc.local
INETCONF=/etc/inet.conf
RCNET=/etc/rc.net
HOSTS=/etc/hosts
HOSTNAME=/etc/hostname.file
USRKBFILE=/.usrkb

step1=""
step2=""
step3=""
v=1 # verbosity
manual_opts=0
prefix=""
cd="no" # running from cd?

eth=""
driver=""
driverargs=""

config=""
manual=""
dhcp="no"

hostname=""
hostname_prev=""
ip=""
ip_prev=""
netmask=""
netmask_prev=""
gateway=""
dns1=""
dns2=""

# Provide some sane defaults
hostname_default=`uname -n`
test -z "$hostname_default" && hostname_default="Minix"
ip_default="10.0.0.1"
netmask_default="255.255.255.0"
gateway_default=""

usage()
{
    cat >&2 <<'EOF'
Usage:

  netconf [-q] [-p <prefix>] [-e <num>] [-a]
  netconf [-H <name> -i <ip> -n <mask> -g <gw> -d <prim dns> [-s <sec dns>]]

  flags:
     -q Limit generated output
     -p Path prefix for configuration files (e.g., during install -p mnt is used as files are mounted on /mnt).
     -e Ethernet card
     -a Use DHCP (-H, -i, -n, -g, -d, and -s flags are discarded)
     -H Hostname
     -i IP address
     -n Netmask
     -g Default gateway
     -d Primary DNS
     -s Secondary DNS
     -h Shows this help file
     -c Shows a list of ethernet cards supported

  By default netconf starts in Interactive mode. By providing parameters on the
  command line, some questions can be omitted.
EOF
    exit 1
}

cards()
{
    echo "0. No Ethernet card (no networking)"
    echo "1. Intel Pro/100"
    echo "2. 3Com 501 or 3Com 509 based card"
    echo "3. Realtek 8139 based card (also emulated by KVM)"
    echo "4. Realtek 8029 based card (also emulated by Qemu)"
    echo "5. NE2000, 3com 503 or WD based card (also emulated by Bochs)"
    echo "6. AMD LANCE (also emulated by VMWare and VirtualBox)"
    echo "7. Different Ethernet card (no networking)"
}

warn()
{
    echo -e "\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b ! $1"
}

do_step1()
{
    # Ask user about networking
    echo "MINIX 3 currently supports the following Ethernet cards. Please choose: "
    echo ""
    cards
    echo ""

    while [ "$step1" != ok ]; do
      echo -n "Ethernet card? [0] "; read eth
      test -z $eth && eth=0

      drv_params $eth
      test -n "$driver" && step1="ok"
    done
}

drv_params()
{
      case "$1" in
        0) driver=psip0;    ;;    
	1) driver=fxp;      ;;
	2) driver=dpeth;    driverargs="#dpeth_arg='DPETH0=port:irq:memory'";
	   test "$v" = 1 && echo ""
           test "$v" = 1 && echo "Note: After installing, edit $LOCALRC to the right configuration."
		;;
	3) driver=rtl8139;  ;;
	4) driver=dp8390;   driverargs="dp8390_arg='DPETH0=pci'";	;;
	5) driver=dp8390;   driverargs="dp8390_arg='DPETH0=240:9'"; 
	   test "$v" = 1 && echo ""
           test "$v" = 1 && echo "Note: After installing, edit $LOCALRC to the right configuration."
           test "$v" = 1 && echo " chose option 4, the defaults for emulation by Bochs have been set."
		;;
        6) driver="lance"; ;;    
        7) driver="psip0"; ;;    
        *) warn "choose a number"
      esac
}

do_step2()
{
    echo ""
    echo "Configure network using DHCP or manually?"
    echo ""
    echo "1. Automatically using DHCP"
    echo "2. Manually"
    echo ""

    while [ "$step2" != ok ]
      do
        echo -n "Configure method? [1] "; read config
	test -z $config && config=1
      
	case "$config" in
	    1) step2="ok"; dhcp="yes" ; ;;
            2) step2="ok"; manual="do"; ;;
	    *) warn "choose a number"
	esac
    done
    
    # Use manual parameters?
    if [ -n "$manual" ]; then
        # Query user for settings
        # Hostname
	if [ -z $hostname_prev ]; then
	    hostname_prev=$hostname_default
	fi
	echo -n "Hostname [$hostname_prev]: "
	read hostname
	if [ ! -z $hostname ]; then
	    hostname_prev=$hostname
	else
	    hostname=$hostname_prev
	fi
	
        # IP address
	if [ -z $ip_prev ]; then
	    ip_prev=$ip_default
	fi
	echo -n "IP address [$ip_prev]: "
	read ip
	if [ ! -z $ip ]; then
	    ip_prev=$ip
	else
	    ip=$ip_prev
	fi
	
        # Netmask
	if [ -z $netmask_prev ]; then
	    netmask_prev=$netmask_default
	fi
	echo -n "Netmask [$netmask_prev]: "
	read netmask
	if [ ! -z $netmask ]; then
	    netmask_prev=$netmask
	else
	    netmask=$netmask_prev
	fi
	
        # Gateway (no gateway is fine for local networking)
	echo -n "Gateway: "
	read gateway
	    
        # DNS Servers
	echo -n "Primary DNS Server [$dns1_prev]: "
	read dns1
	test -z "$dns1" && test -n "$dns1_prev" && dns1=$dns1_prev
	if [ ! -z "$dns1" ]; then
	    dns1_prev=$dns1
	    
	    echo -n "Secondary DNS Server [$dns2_prev]: "
	    read dns2
	    if [ ! -z $dns2 ]; then
		dns2_prev=$dns2
	    fi
	else
	    # If no primary DNS, then also no secondary DNS
	    dns2=""
	fi
    fi
}

# Parse options
while getopts ":qe:p:aH:i:n:g:d:s:hc" arg; do
    case "$arg" in
	q) v=0; ;;
	e) ethernet=$OPTARG; 
	   test "$ethernet" -ge 0 -a "$ethernet" -le 7 2>/dev/null || usage
	   drv_params $ethernet
	   ;;
	p) prefix=$OPTARG; ;;
	a) dhcp="yes"; ;;
	H) hostname=$OPTARG; manual_opts=`expr $manual_opts '+' 1`;;
	i) ip=$OPTARG;       manual_opts=`expr $manual_opts '+' 1`;;
	n) netmask=$OPTARG;  manual_opts=`expr $manual_opts '+' 1`;;
	g) gateway=$OPTARG;  manual_opts=`expr $manual_opts '+' 1`;;
	d) dns1=$OPTARG;     ;;
	s) dns2=$OPTARG;     ;;
	h) usage ;;
	c) echo -e "The following cards are supported by Minix:\n";
	   cards; exit 0
	   ;;
	\?) echo "Unknown option -$OPTARG"; usage ;;
	:) echo "Missing required argument for -$OPTARG"; usage ;;
	*)  usage ;;
    esac
done

# Verify parameter count
if [ "$dhcp" != "yes" ] ; then
    if [ $manual_opts -gt 0 ] ; then
        test $manual_opts -eq 4 -a -n "$dns1" || usage
        manual="do"
    fi
fi

if [ -n "$prefix" ] ; then
    LOCALRC=$prefix$LOCALRC
    INETCONF=$prefix$INETCONF
    RCNET=$prefix$RCNET
    HOSTS=$prefix$HOSTS
    HOSTNAME=$prefix$HOSTNAME
    if [ ! -f  $INETCONF ]; then
    	echo -e "It seems the supplied prefix (\`$prefix') is invalid."
    	exit 1
    fi
fi

if [ "$USER" != root ] ; then
    test "$v" = 1 && echo "Please run netconf as root."
    exit 1
fi

# Are we running from CD?
if [ -f "$USRKBFILE" ] ; then
    cd="yes" # We are running from CD
fi

# Do we know what ethernet card to use?
test -z "$ethernet" && do_step1

# If no parameters are supplied and we're not using DHCP, query for settings
test $manual_opts -eq 0 -a "$dhcp" = "no" && do_step2

# Store settings.
# Do not make backups if we're running from CD
test "$cd" != "yes" && test -f $INETCONF && mv $INETCONF "$INETCONF~" && 
                     test "$v" = 1 && echo "Backed up $INETCONF to $INETCONF~"
test "$cd" != "yes" && test -f $LOCALRC && mv $LOCALRC "$LOCALRC~" &&
                     test "$v" = 1 && echo "Backed up $LOCALRC to $LOCALRC~"

echo "eth0 $driver 0 { default; } ;" > $INETCONF
echo "$driverargs" > $LOCALRC

if [ -n "$manual" ]
    then
    # Backup config file if it exists and we're not running from CD
    test "$cd" != "yes" && test -f $RCNET && mv $RCNET "$RCNET~" && 
                      test "$v" = 1 && echo "Backed up $RCNET to $RCNET~"
    test "$cd" != "yes" && test -f $HOSTS && mv $HOSTS "$HOSTS~" && 
                      test "$v" = 1 && echo "Backed up $HOSTS to $HOSTS~"

    # Store manual config
    echo "ifconfig -I /dev/ip0 -n $netmask -h $ip" > $RCNET
    test ! -z $gateway && echo "add_route -g $gateway" >> $RCNET
    echo "daemonize nonamed -L" >> $RCNET
    test ! -z $dns1 && echo -e "$ip\t%nameserver\t#$hostname" > $HOSTS
    test ! -z $dns1 && echo -e "$dns1\t%nameserver\t#DNS 1" >> $HOSTS
    test ! -z $dns2 && echo -e "$dns2\t%nameserver\t#DNS 2" >> $HOSTS
    echo -e "\n$ip\t$hostname" >> $HOSTS
    echo $hostname > $HOSTNAME
else
    test "$cd" != "yes" && test -f "$RCNET" && mv "$RCNET" "$RCNET~" && 
        test "$v" = 1 && echo "Moved $RCNET to $RCNET~ to use default settings"
    test "$cd" != "yes" && test -f $HOSTS && mv $HOSTS "$HOSTS~" && 
        test "$v" = 1 && echo "Backed up $HOSTS to $HOSTS~"
    test -f "$HOSTS~" && grep -v "%nameserver" "$HOSTS~" > $HOSTS
fi

test "$cd" != "yes" && test "$v" = 1 && echo "
You might have to reboot for the changes to take effect."
exit 0