#!/bin/sh
#
# $OpenBSD: dhclient-script,v 1.11 2000/10/18 23:42:56 todd 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"
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
    ifconfig $interface inet -alias $old_ip_address $medium
    route delete "$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
	ifconfig $interface inet $new_ip_address netmask $new_subnet_mask \
				    broadcast $new_broadcast_address $medium
    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 netmask $alias_subnet_mask
    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
    ifconfig $interface inet -alias $old_ip_address $medium
    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 netmask $alias_subnet_mask
    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
  ifconfig $interface inet $new_ip_address netmask $new_subnet_mask \
		broadcast $new_broadcast_address $medium
  sleep 1
  if [ "$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 netmask $alias_subnet_mask
	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
  ifconfig $interface inet -alias $new_ip_address $medium
  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