#!/bin/bash
#
# network - network plugin for postplug
#
# Copyright (c) 2004-2007 by Davide Madrisan <davide.madrisan@qilinux.it>
# Copyright (c) 2009-2011 by Silvan Calarco <silvan.calarco@mambasoft.it>
#

if [ $UID != 0 ]; then
   echo "$0: must be superuser." >&2
   exit 1
fi

me="network"

. /etc/postplug/postplug.defs

postplugnew_file=$postplugnewdir/network
rm -f $postplugnew_file

[ -r /etc/sysconfig/postplug ] && . /etc/sysconfig/postplug

[ -r /etc/sysconfig/rc ] && . /etc/sysconfig/rc
[ -r $rc_networkfunctions ] && . $rc_networkfunctions

resolv_conf=/etc/resolv.conf
sysconf_network=/etc/sysconfig/network

function wlan_config_auto() {

   local wlan_interface="$1"

   cat > $network_devices/ifcfg-${wlan_interface} << _EOF
DEVICE=${wlan_interface}
BOOTPROTO=dhcp
ONBOOT=yes
#NM_CONTROLLED=no
#WIRELESS_ESSID=""
#WIRELESS_MODE=managed
#WIRELESS_ENC=s:ENCRYPTIONKEY
#WIRELESS_NWID=
#WIRELESS_FREQ=
_EOF

}

function eth_config_auto() {

   local eth_interface="$1"

   cat > $network_devices/ifcfg-${eth_interface} << _EOF
DEVICE=${eth_interface}
BOOTPROTO=dhcp
ONBOOT=yes
#NM_CONTROLLED=no
_EOF

}


function eth_config() {
   # eth_config {--enable|--disable|--auto} <int_name>

   TEMP=`LANG=C getopt -o eda --long enable,disable,auto -n "$FUNCNAME" -- "$@"`
   [[ $? = 0 ]] || return 1

   eval set -- "$TEMP"

   local action
   while :; do
      case $1 in
      -e|--enable)
         action="enable" ;;
      -d|--disable)
         action="disable" ;;
      -a|--auto)
         action="auto" ;;
      --) shift; break ;;
      *) logmsg "$me" "FIXME: "$"\`getopt' error"
         exit 1
      ;;
      esac
      shift
   done

   local eth_interface="$1"

   [ "$eth_interface" ] ||
    { logmsg "$me" "FIXME: "$"no interface set"
      exit 1; }

   unset IF_IPADDR IF_NETMASK IF_NETWORK IF_BROADCAST DEST_GATEWAY_IF

   if [ "$action" = "disable" ]; then
      cat > $network_devices/ifcfg-${eth_interface} << _EOF
DEVICE=${eth_interface}
ONBOOT=no
_EOF
      return
   fi

   $DIALOG --colors \
      --backtitle "\
$dialog_backtitle -- "$"Network devices configuration" \
      --title $" LAN INTERFACE CONFIGURATION " \
      --yesno "
"$"Automatically configure (DHCP) the \Z4$2\Zn interface?" 7 62

   # configure DHCP for this interface
   if [ $? -eq 0 ]; then
      cat > $network_devices/ifcfg-${eth_interface} << _EOF
DEVICE=${eth_interface}
BOOTPROTO=dhcp
ZONE=local
ONBOOT=yes
_EOF
   else   # no DHCP. Ask for manual configuration
      while :; do
         $DIALOG --colors \
            --output-fd 4 \
            --ok-label "OK" --no-cancel \
            --backtitle "\
$dialog_backtitle -- "$"Network interface configuration" \
            --title $" LAN INTERFACE CONFIGURATION ""(${eth_interface}) " \
            --form "
"$"Please enter configuration for network interface" 10 54 2 \
            $"IP address:" 1 1 "$IF_IPADDR"   1 18 30 15 \
            $"Netmask:"    2 1 "$IF_NETMASK"  2 18 30 15 4>$tmpdialog

         # workaround to correctly process blank field
         local field icount=0
         for field in $(sed 's/^/=/g' $tmpdialog); do
            field=$(echo $field | sed 's/^=//')
            case $icount in
               0) IF_IPADDR="$field" ;;
               1) IF_NETMASK="$field" ;;
            esac
            let icount+=1
         done

         if [[ -n "$IF_IPADDR" && -n "$IF_NETMASK" ]]; then
            calculate_ip_parameters "$IF_IPADDR" "$IF_NETMASK"
            [[ $? -eq 0 ]] || {
               unset IF_IPADDR IF_NETMASK; continue; }

            IF_NETWORK=$network
            IF_BROADCAST=$broadcast
            break
         fi
      done
      cat > $network_devices/ifcfg-${eth_interface} << _EOF
DEVICE=${eth_interface}
ONBOOT=yes
IPADDR=$IF_IPADDR
NETWORK=$IF_NETWORK
NETMASK=$IF_NETMASK
BROADCAST=$IF_BROADCAST
#NM_CONTROLLED=no
_EOF
   fi
}

# FIXME
DEST_GATEWAY_ZONE=local

# Get Default Gateway IP address and DNS addresses
function net_config() {
   unset DEST_GATEWAY_IP DNS_PRIMARY DNS_SECONDARY DEST_DOMAIN
   let "retval = 0"

   while test $retval != 99; do
      let "error = 0"
      $DIALOG --colors \
         --cr-wrap \
         --output-fd 4 \
         --no-cancel \
         --backtitle "\
$dialog_backtitle -- "$"Network devices configuration" \
         --title $" DEFAULT GATEWAY / DNS ADDRESSES / DOMAIN " \
         --form "
"$"Please enter the IP addresses of the \Z1default gateway\Zn, \
\Z1primary DNS server\Zn and \Z1secondary DNS server\Zn (optional) \
and the domain name." 13 72 4 \
         $"Default gateway:" 1 1 "$DEST_GATEWAY_IP" 1 22 44 15 \
         $"Primary DNS:"     2 1 "$DNS_PRIMARY"     2 22 44 15 \
         $"Secondary DNS:"   3 1 "$DNS_SECONDARY"   3 22 44 15 \
         $"Domain:"          4 1 "$DEST_DOMAIN"     4 22 44 15 4>$tmpdialog

      case $? in
      0) # workaround to correctly process blank fields and chars
         let "icount = 0"
         for field in $(sed 's/ /+_:\./g; s/^/=/g' $tmpdialog); do
            field=`echo $field | sed 's/^=//; s/+_:\./ /g'`
            case $icount in
            0) DEST_GATEWAY_IP="$field"
               # check for invalid IP addresses
               ip_check_args "$DEST_GATEWAY_IP/32"
               [[ $? -eq 1 ]] ||
                { unset DEST_GATEWAY_IP; let "error += 1"; } ;;
            1) DNS_PRIMARY="$field"
               ip_check_args "$DNS_PRIMARY/32"
               [[ $? -eq 1 ]] ||
                { unset DNS_PRIMARY; let "error += 1"; } ;;
            2) DNS_SECONDARY="$field"
               if test -n "$DNS_SECONDARY"; then
                  ip_check_args "$DNS_SECONDARY/32"
                  [[ $? -eq 1 ]] ||
                   { unset DNS_SECONDARY; let "error += 1"; }
               fi ;;
            3) DESTHOSTNAME="$field" ;;
            esac
            let "icount += 1"
         done

         [[ $error -eq 0 ]] && let "retval = 99" || continue

         # DNS_SECONDARY is optional
         if [[ -n "$DEST_GATEWAY_IP" && -n "$DNS_PRIMARY" ]]; then
            # FIXME : has /etc/resolv.conf already been configured?
            [[ -e $resolv_conf ]] && sed -i '/#/d' $resolv_conf
            cat >> $resolv_conf << _EOF
domain $DESTHOSTNAME
search $DESTHOSTNAME
nameserver $DNS_PRIMARY
_EOF
            [[ "$DNS_SECONDARY" ]] &&
               echo "nameserver $DNS_SECONDARY" >> $resolv_conf
            sed -i '/nameserver 127.0.0.1/d' $resolv_conf
            # we want this line in the last position
            echo "nameserver 127.0.0.1" >> $resolv_conf
         fi

         (cd /etc/sysconfig/$network_devices/ &&
          for sysconfile in $(ls ifcfg-* 2>/dev/null); do
             . $sysconfile
             # configure the default gateway using the first
             # interface not configured with DHCP
             if [[ "$ONBOOT" = yes && "$BOOTPROTO" != dhcp ]]; then
                sed -i "/GATEWAY=/d;/GATEWAY_IF=/d" $sysconf_network
                echo "\
GATEWAY_IF=${sysconfile##*\.}
GATEWAY=$DEST_GATEWAY_IP" >> $sysconf_network
                break
             fi
          done) ;;
      esac
   done
}


wlan_ints=()
for wlan_int in $(cat /proc/net/wireless 2>/dev/null | sed -n '/[a-z]*[0-9]*:/{s,:.*,,;p}'); do
   # checks for existing physical interfaces
   /sbin/ifconfig $wlan_int >/dev/null 2>&1 || continue

   # found interface already configured
   [ -e $network_devices/ifcfg-$wlan_int ] && continue

   wlan_ints[${#wlan_ints[*]}]="$wlan_int"
   echo "$wlan_int" >> $postplugnew_file 2>/dev/null
done

eth_ints=()
for eth_int in $(cat /proc/net/dev | sed -n '/eth[0-9]*:/{s,:.*,,;p}'); do
   # checks for existing physical interfaces
   /sbin/ifconfig $eth_int >/dev/null 2>&1 || continue

   # found interface already configured
   [ -e $network_devices/ifcfg-$eth_int ] && continue

   eth_ints[${#eth_ints[*]}]="$eth_int"
   echo "$eth_int" >> $postplugnew_file 2>/dev/null
done

# how many interface have been configured?
let "int_newconf = 0"

if [ ${#eth_ints[*]} -gt 0 ]; then
   case "$NETWORK_NEWDEVICE" in
   "auto")
      for eth_int in ${eth_ints[*]}; do
         eth_config_auto $eth_int
         let "int_newconf += 1"
      done
      exit
   ;;
   "dialog")
      tmpdialog=`mktemp -q -t ${0##*/}.XXXXXXXX` ||
       { logmsg "$me" "error: "$"cannot create temporary files"
          { (exit 1); exit 1; }; }
      trap "rm -f $tmpdialog" 0 1 2 3 5 15

      $DIALOG --clear --colors $dialog_timeout_cmd \
         --backtitle "\
$dialog_backtitle -- "$"Network devices configuration" \
         --title $" LAN INTERFACE CONFIGURATION " \
         --yesno "
"$"Found ${#eth_ints[*]} LAN interface(s) not configured.""
"$"Do you want to start the configuration wizard?" 8 62 2>/dev/null

      case $? in
      0) # ask configuration for all the eth. interfaces
         for eth_int in ${eth_ints[*]}; do
            eth_config --enable $eth_int
            let "int_newconf += 1"
         done ;;
      1) # disable all the ethernet interfaces
         for eth_int in ${eth_ints[*]}; do
            eth_config --disable $eth_int
         done
         exit ;;
      *) : ;; # timeout (code = 255)
      esac
   ;;
   "off"|"")
      exit
   ;;
   *) logmsg "$me" "error: "$"\
illegal value for NETWORK_NEWDEVICE ($NETWORK_NEWDEVICE)"
      exit 1
   ;;
   esac
fi

if [ ${#wlan_ints[*]} -gt 0 ]; then
   # FIXME: wlan dialog support is missing
   case "$NETWORK_NEWDEVICE" in
   "auto")
      for wlan_int in ${wlan_ints[*]}; do
         wlan_config_auto $wlan_int
         let "int_newconf += 1"
      done
      exit
   ;;
   esac
fi

# if at least one of the new interfaces has been configured...
if [ $NETWORK_NEWDEVICE = "dialog" -a $int_newconf -gt 0 ]; then

   for eth_int in ${eth_ints[*]}; do
      [ -r $network_devices/ifcfg-$eth_int ] || continue
      unset BOOTPROTO
      . $network_devices/ifcfg-$eth_int
      [ "$BOOTPROTO" = "dhcp" ] && exit
   done

   for wlan_int in ${wlan_ints[*]}; do
      [ -r $network_devices/ifcfg-$wlan_int ] || continue
      unset BOOTPROTO
      . $network_devices/ifcfg-$wlan_int
      [ "$BOOTPROTO" = "dhcp" ] && exit
   done

   # if no interface has been configured as DHCP interface
   # get the Default Gateway + DNS + Domain infos via a dialog window
   net_config
   $DIALOG --clear
fi

# modify the file /etc/hosts if a static IP has been configured
#if grep -Eq "^127\.0\.0\.1 `hostname -f`" /etc/hosts; then
#   get_interfaces_by_zone
#   # check first local interfaces, then public ones and finally dmz interfaces
#   for if_name in ${ifzone_local[*]} ${ifzone_public[*]} ${ifzone_dmz[*]}; do
#      get_interface_parameters $if_name
#      if [[ $? -eq 0 && "$int_static_ip" = 1 ]]; then
#         sed -i "\
#/127\.0\.0\.1 `hostname -f`/{
#   s/.*/127.0.0.1 localhost.localdomain localhost/}
#   /127.0.0.1.*/a\\
#$int_ip `hostname -f` `hostname`" /etc/hosts
#      fi
#   done
#fi

rm -f $tmpdialog

exit 0