#!/bin/bash

######################
# LOOPBACK FUNCTIONS #
######################

# Function to bring up the loopback interface.  If loopback is
# already up, do nothing.
lo_up() {
  if grep lo: /proc/net/dev 1> /dev/null ; then
    if ! /sbin/ifconfig | grep "^lo" 1> /dev/null ; then
      echo "/etc/rc.d/rc.inet1:  /sbin/ifconfig lo 127.0.0.1" | $LOGGER
      /sbin/ifconfig lo 127.0.0.1
      echo "/etc/rc.d/rc.inet1:  /sbin/route add -net 127.0.0.0 netmask 255.0.0.0 lo" | $LOGGER
      /sbin/route add -net 127.0.0.0 netmask 255.0.0.0 lo
    fi
  fi
}

# Function to take down the loopback interface:
lo_down() {
  if grep lo: /proc/net/dev 1> /dev/null ; then
    echo "/etc/rc.d/rc.inet1:  /sbin/ifconfig lo down" | $LOGGER
    /sbin/ifconfig lo down
  fi
}

######################
# ETHERNET FUNCTIONS #
######################

eth_up() {
  DHCPRESULT=`dhcpcd -d -R -t 3 | grep -c ""`
  if [ $DHCPRESULT == 2 ] ; then
    echo "Konfiguruje bez DHCP"
    IPADDR="153.19.107.206"
    NETMASK="255.255.255.224"
    GATEWAY="153.19.107.193"
    DNS1="nameserver 153.19.250.100"
    DNS2=""
    DNS3=""
    BROADCAST=`/bin/ipmask ${NETMASK} ${IPADDR} | cut -f 1 -d ' '`
    /sbin/ifconfig eth0 ${IPADDR} broadcast ${BROADCAST} netmask ${NETMASK}
    /sbin/route add default gw ${GATEWAY} metric 0 2>&1
    if [[ ${DNS1} != "" ]] ; then
      echo ${DNS1} > /etc/resolv.conf
    fi
    if [[ ${DNS2} != "" ]] ; then
      echo ${DNS2} >> /etc/resolv.conf
    fi
    if [[ ${DNS3} != "" ]] ; then
      echo ${DNS3} >> /etc/resolv.conf
    fi
  else
    echo "Skonfigurowalem z DHCP"
  fi
}

eth_down() {
  /sbin/dhcpcd -k -d eth0 ||  /sbin/ifconfig eth0 down
  sleep 1
  /sbin/ifconfig eth0 down
}

## MAIN ##
##########

case "$1" in
'start') # "start" brings up all available interfaces:
  lo_up
  eth_up
  ;;
'stop')
  lo_down
  eth_down
  ;;
'restart')
  lo_down
  eth_down
  lo_up
  eth_up
  ;;
*)
 echo "usage: ${0} start|stop|restart"
esac