#!/bin/sh
# udhcpc script edited by Tim Riker <Tim@Rikers.org>
# revised:  12/4/05 by brent@mbari.org

[ -z "$1" ] && echo "Error: should be called from udhcpc" && exit 1

RESOLV_CONF="/etc/resolv.conf"
HOSTS="/etc/hosts"
leased=/var/run/leased-$interface

case "$1" in
  deconfig|leasefail)
    if [ -f $leased ]; then
      unset DEVICE IPADDR NETMASK BROADCAST NETWORK
      . /etc/sysconfig/ifcfg-$interface || IPADDR=0.0.0.0
      unset mask cast
      [ "$NETMASK" ] && mask="netmask $NETMASK"
      [ "$BROADCAST" ] && cast="broadcast $BROADCAST"
      echo -n "$interface DHCP failed: "
      ifconfig $interface down  #purge old routes
      ifconfig $interface $IPADDR $mask $cast && {
        echo "IP=$IPADDR $mask $cast"
        [ "$NETWORK" ] && route add -net $NETWORK $mask dev $interface
        [ "$GATEWAY" ] && route add default gateway $GATEWAY dev $interface
      }
      hostname -F /etc/HOSTNAME  #revert back to original host name
      type resolv_conf >/dev/null 2>&1 && resolv_conf > $RESOLV_CONF
      eval $NSprepCmd
      rm $leased
    else
      ifconfig $interface up  #so dhcp can use it
    fi
  ;;

  renew|bound)
    newLeaseSpec="$ip M:$subnet B:$broadcast G:$router"
    newDNSspec="$domain DNS:$dns"
    leaseSpec=
    DNSspec=
    [ -f $leased ] && { read leaseSpec && read DNSspec; } < $leased
    [ "$newLeaseSpec" = "$leaseSpec" ] || { 
      [ "$broadcast" ] && BROADCAST="broadcast $broadcast"
      [ "$subnet" ] && NETMASK="netmask $subnet"
      ifconfig $interface $ip $BROADCAST $NETMASK &&
        echo "DHCP $1 $interface to $ip $NETMASK $BROADCAST"

      if [ "$router" ] ; then
	while route del default gw 0.0.0.0 dev $interface 2>/dev/null; do
          :
	done

        for i in $router ; do
	   route add default gw $i dev $interface
        done
      fi
      echo "$newLeaseSpec" >$leased
    }    
    [ "$newDNSspec" = "$DNSspec" ] || { 
      unset dom
      [ "$hostname" ] && hostname $hostname && \
        echo "hostname set to $hostname"
      echo search $domain mbari.org > $RESOLV_CONF
      for i in $dns ; do
	echo adding dns $i
	echo nameserver $i >> $RESOLV_CONF
      done
      echo "127.0.0.1 localhost" >$HOSTS #clear any ad hoc DNS
      echo "$newDNSspec" >>$leased
    }

esac