#!/bin/bash
#
# Writen by: Marcio Pessoa <marcio@pessoa.eti.br>
#
# This script is used to discover IP address
#

# Checks if there is wget
PROGRAM=`which wget`
if [ ! -f "$PROGRAM" ]; then
	echo "wget was not found."
	exit 10
fi

# Get public IP address
function get_ip_addr
{
	STATUS=`$PROGRAM http://pessoa.eti.br/ip/ -q -O -`
	RETURN=$?
	
	check_get_ip_addr $STATUS $RETURN
}

# Check status from get_ip_addr
function check_get_ip_addr
{
	STATUS=$1
	RETURN=$2
	case $RETURN in
	  0)
		echo $STATUS
		exit 0
		;;
	  1)
		echo "Generic error code."
		exit 2
		;;
	  2)
		echo "Parse error---for instance, when parsing command-line options, the .wgetrc or .netrc..."
		exit 2
		;;
	  3)
		echo "File I/O error."
		exit 2
		;;
	  4)
		echo "Network failure."
		exit 2
		;;
	  5)
		echo "SSL verification failure."
		exit 2
		;;
	  6)
		echo "Username/password authentication failure."
		exit 2
		;;
	  7)
		echo "Protocol errors."
		exit 2
		;;
	  8)
		echo "Server issued an error response."
		exit 2
		;;
	  *)
		echo "Unknown error."
		exit 3
		;;
	esac
}

# Check for input options
case "$1" in
  "")
	get_ip_addr;
	;;
  *)
	echo "Usage: $0 without options."
	echo
	echo "Version: 0.01b"
	echo "Report bugs to: Marcio Pessoa <marcio@pessoa.eti.br>"
	;;
esac
exit 0