#!/bin/bash

# This script enables wifi for my laptop outside the home network
# Run this script as root only

# Function to configure ath0 and obtain a DHCP IP address
dhcp_get() {
  echo "Configuring interface ...";
  iwconfig ath0 essid any key off ;
  echo "Acquiring IP Address ... "; 
  dhcpcd -d -t 10 ath0;
  # The following will check if there was an IP addr issued
  if [[ -f /etc/dhcpc/dhcpcd-ath0.pid ]]; then
    echo "Connection ready!";
    echo ;
    iwconfig ath0;
  else
    echo "Connection attempt unsuccessful.";
    echo ;
    iwconfig ath0;    # dhcpcd will automatically bring ath0 down
  fi
}

# If chosen not to connect, turn off the interface
if_down() {
  ifconfig ath0 down ;
  echo "WiFi interface not configured." ;
  exit ;
}

# Bring the interface up and scan for networks
ifconfig ath0 up
iwlist ath0 scan |more		# List available networks

# Ask to connect
echo "Attempt connection (y/n)?"
read x

# yes or else
case $x in 
  'y')  dhcp_get
        ;;
  *)    if_down
        ;;
esac