#!/bin/sh

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

RESOLV_CONF="/etc/resolv.conf"
test -n "$broadcast" && BROADCAST="broadcast $broadcast"
test -n "$subnet" && NETMASK="netmask $subnet"

case "$1" in
deconfig)
  logger -p local0.notice "DHCP deconfig"
  grep -q -v ip= /proc/cmdline
  if test $? -eq 0; then
    ifconfig $interface up
  fi
  grep -q -v nfsroot= /proc/cmdline
  if test $? -eq 0; then
    ifconfig $interface 0.0.0.0
  fi
  rm -f /tmp/satip-network
  killall -9 minisatip 2> /dev/null
  ;;
leasefail|nak)
  logger -p local0.notice "DHCP $1"
  ;;
renew|bound)
  old=$(ifconfig $interface | head -2 | tail -1 | cut -d ':' -f 2 | cut -d ' ' -f 1)
  logger -p local0.notice "DHCP $1 ('$ip' '$BROADCAST' '$NETMASK' | '$router' '$dns') replacing '$old'"
  if test "$old" != "$ip" -a -r /tmp/satip-network; then
    logger -p local0.notice "DHCP IPv4 changed, killing minisatip"
    rm -f /tmp/satip-network
    killall -9 minisatip 2> /dev/null
  fi
  ifconfig $interface $ip $BROADCAST $NETMASK
  if test -n "$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 -n > $RESOLV_CONF
  test -n "$domain" && echo "search $domain" >> $RESOLV_CONF
  for i in $dns ; do
    echo "nameserver $i" >> $RESOLV_CONF
  done
  # kill always ntpd
  if test -r /var/run/ntpd.pid; then
    kill -9 $(cat /var/run/ntpd.pid) 2> /dev/null
  fi
  # notify satip init script
  echo "ok" | nc 127.0.0.1 999 2> /dev/null
  sleep 0.5
  echo "ok" | nc 127.0.0.1 999 2> /dev/null
;;
esac
exit 0