#!/bin/sh
#
# $OpenBSD: dhclient-script,v 1.7 2000/07/03 22:33:19 niklas Exp $
#

if [ "x$new_network_number" != "x" ]; then
   echo "New Network Number: $new_network_number"
fi

if [ "x$new_broadcast_address" != "x" ]; then
 echo "New Broadcast Address: $new_broadcast_address"
  new_broadcast_arg="broadcast $new_broadcast_address"
fi
if [ "x$old_broadcast_address" != "x" ]; then
  old_broadcast_arg="broadcast $old_broadcast_address"
fi
if [ "x$new_subnet_mask" != "x" ]; then
  new_netmask_arg="netmask $new_subnet_mask"
fi
if [ "x$old_subnet_mask" != "x" ]; then
  old_netmask_arg="netmask $old_subnet_mask"
fi
if [ "x$alias_subnet_mask" != "x" ]; then
  alias_subnet_arg="netmask $alias_subnet_mask"
fi

if [ "x$reason" = "xMEDIUM" ]; then
  ifconfig "$interface" "$medium"
  ifconfig "$interface" inet -alias 0.0.0.0 "$medium" >/dev/null 2>&1
  sleep 1
  exit 0
fi

if [ "x$reason" = "xPREINIT" ]; then
  if [ "x$alias_ip_address" != "x" ]; then
    ifconfig "$interface" inet -alias "$alias_ip_address" > /dev/null 2>&1
    route delete "$alias_ip_address" 127.0.0.1 > /dev/null 2>&1
  fi
  ifconfig "$interface" inet 0.0.0.0 netmask 0.0.0.0 \
		broadcast 255.255.255.255 up
  exit 0
fi

if [ "x$reason" = "xARPCHECK" ] || [ "x$reason" = "xARPSEND" ]; then
  exit 0;
fi
  
if [ "x$reason" = "xBOUND" ] || [ "x$reason" = "xRENEW" ] || \
   [ "x$reason" = "xREBIND" ] || [ "x$reason" = "xREBOOT" ]; then
  if [ "x$old_ip_address" != "x" ] && [ "x$alias_ip_address" != "x" ] && \
		[ "x$alias_ip_address" != "x$old_ip_address" ]; then
    ifconfig "$interface" inet -alias "$alias_ip_address" > /dev/null 2>&1
    route delete "$alias_ip_address" 127.0.0.1 > /dev/null 2>&1
  fi
  if [ "x$old_ip_address" != "x" ] && [ "x$old_ip_address" != "x$new_ip_address" ]; then
    if [ "x$medium" != "x" ]; then
	ifconfig "$interface" inet -alias "$old_ip_address" "$medium"
    else
	ifconfig "$interface" inet -alias "$old_ip_address"
    fi
    route delete "$old_ip_address" 127.1 >/dev/null 2>&1
    for router in "$old_routers"; do
      route delete default "$router" >/dev/null 2>&1
    done
    if [ "$old_static_routes" != "" ]; then
      set $old_static_routes
      while [ $# -gt 1 ]; do
	route delete "$1" "$2"
	shift; shift
      done
    fi
    arp -n -a | sed -n -e 's/^.*(\(.*\)) at .*$/arp -d \1/p' |sh
  fi
  if [ "x$old_ip_address" = "x" ] || [ "x$old_ip_address" != "x$new_ip_address" ] || \
     [ "x$reason" = "xBOUND" ] || [ "x$reason" = "xREBOOT" ]; then
    if [ "x$medium" != "x" ]; then
	ifconfig "$interface" inet "$new_ip_address" $new_netmask_arg \
					    $new_broadcast_arg "$medium"
    else
	ifconfig "$interface" inet "$new_ip_address" $new_netmask_arg \
					    $new_broadcast_arg
    fi
    route add "$new_ip_address" 127.1 >/dev/null 2>&1
    for router in "$new_routers"; do
      route add default "$router" >/dev/null 2>&1
    done
    if [ "$new_static_routes" != "" ]; then
      set "$new_static_routes"
      while [ $# -gt 1 ]; do
	route add "$1" "$2"
	shift; shift
      done
    fi
  fi
  if [ "x$new_ip_address" != "x$alias_ip_address" ] && [ "x$alias_ip_address" != "x" ];
   then
    ifconfig "$interface" inet alias "$alias_ip_address" $alias_subnet_arg
    route add "$alias_ip_address" 127.0.0.1
  fi
  if [ "x$new_domain_name" != "x" ];
   then
    if [ -n "$new_domain_name_servers" ];
     then
      echo "search $new_domain_name" >/etc/resolv.conf
      for nameserver in "$new_domain_name_servers"; do
        echo "nameserver $nameserver" >>/etc/resolv.conf
      done
      if [ -f /etc/resolv.conf.tail ]; then
	cat /etc/resolv.conf.tail >>/etc/resolv.conf
      fi
      exit 0
    fi
  fi
fi

if [ "x$reason" = "xEXPIRE" ] || [ "x$reason" = "xFAIL" ]; then
  if [ "x$alias_ip_address" != "x" ]; then
    ifconfig "$interface" inet -alias "$alias_ip_address" > /dev/null 2>&1
    route delete "$alias_ip_address" 127.0.0.1 > /dev/null 2>&1
  fi
  if [ "x$old_ip_address" != "x" ]; then
    if [ "x$medium" != "x" ]; then
	ifconfig "$interface" inet -alias "$old_ip_address" "$medium"
    else
	ifconfig "$interface" inet -alias "$old_ip_address"
    fi
    route delete "$old_ip_address" 127.1 >/dev/null 2>&1
    for router in "$old_routers"; do
      route delete default "$router" >/dev/null 2>&1
    done
    if [ "$old_static_routes" != "" ]; then
      set "$old_static_routes"
      while [ $# -gt 1 ]; do
	route delete "$1" "$2"
	shift; shift
      done
    fi
    arp -n -a | sed -n -e 's/^.*(\(.*\)) at .*$/arp -d \1/p' \
						|sh >/dev/null 2>&1
  fi
  if [ "x$alias_ip_address" != "x" ]; then
    ifconfig "$interface" inet alias "$alias_ip_address" $alias_subnet_arg
    route add "$alias_ip_address" 127.0.0.1
  fi
  exit 0
fi

if [ "x$reason" = "xTIMEOUT" ]; then
  if [ "x$alias_ip_address" != "x" ]; then
    ifconfig "$interface" inet -alias "$alias_ip_address" > /dev/null 2>&1
    route delete "$alias_ip_address" 127.0.0.1 > /dev/null 2>&1
  fi
  if [ "x$medium" != "x" ]; then
    ifconfig "$interface" inet "$new_ip_address" $new_netmask_arg \
					    $new_broadcast_arg "$medium"
  else
    ifconfig "$interface" inet "$new_ip_address" $new_netmask_arg \
					    $new_broadcast_arg
  fi
  sleep 1
  if [ "$new_routers" != "" ]; then
    set "$new_routers"
    if ping -q -c 1 -w 1 "$1"; then
      if [ "x$new_ip_address" != "x$alias_ip_address" ] && \
			[ "x$alias_ip_address" != "x" ]; then
	ifconfig "$interface" inet alias "$alias_ip_address" $alias_subnet_arg
	route add "$alias_ip_address" 127.0.0.1
      fi
      route add "$new_ip_address" 127.1 >/dev/null 2>&1
      for router in "$new_routers"; do
	route add default "$router" >/dev/null 2>&1
      done
      if [ "$new_static_routes" != "" ]; then
        set "$new_static_routes"
        while [ $# -gt 1 ]; do
	  route add "$1" "$2"
	  shift; shift
        done
      fi
      if [ "$new_domain_name" != "" ]; then
        if [ -n "$new_domain_name_servers" ]; then
          echo "search $new_domain_name" >/etc/resolv.conf.std
          for nameserver in "$new_domain_name_servers"; do
  	    echo "nameserver $nameserver" >>/etc/resolv.conf.std
          done
          if [ -f /etc/resolv.conf.tail ]; then
	    cat /etc/resolv.conf.tail >>/etc/resolv.conf.std
      	  fi
          if [ -f /etc/resolv.conf ]; then
	    rm -f /etc/resolv.conf
          fi
          mv /etc/resolv.conf.std /etc/resolv.conf
          exit 0
        fi
      fi
    fi
  fi
  if [ "x$medium" != "x" ]; then
    ifconfig "$interface" inet -alias "$new_ip_address" "$medium"
  else
    ifconfig "$interface" inet -alias "$new_ip_address"
  fi
  for router in "$old_routers"; do
    route delete default "$router" >/dev/null 2>&1
  done
  if [ "$old_static_routes" != "" ]; then
    set "$old_static_routes"
    while [ $# -gt 1 ]; do
      route delete "$1" "$2"
      shift; shift
    done
  fi
  arp -n -a | sed -n -e 's/^.*(\(.*\)) at .*$/arp -d \1/p' \
							|sh >/dev/null 2>&1
  exit 1
fi

exit 0
