<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
 
/*** Brett: Fri Sep 19 23:18:46 GMT 2008
 * Extension to Input class to correctly get netscaler remote ip address  ***/
 
class MY_Input extends CI_Input
{
	function ip_address()
	{
		if ($this->ip_address !== FALSE)
		{
			return $this->ip_address;
		}
 
		if ($this->server('HTTP_X_CLIENTIP'))
		{
			 $this->ip_address = $_SERVER['HTTP_X_CLIENTIP'];
		}
		elseif ($this->server('REMOTE_ADDR') AND $this->server('HTTP_CLIENT_IP'))
		{
			 $this->ip_address = $_SERVER['HTTP_CLIENT_IP'];
		}
		elseif ($this->server('REMOTE_ADDR'))
		{
			 $this->ip_address = $_SERVER['REMOTE_ADDR'];
		}
		elseif ($this->server('HTTP_CLIENT_IP'))
		{
			 $this->ip_address = $_SERVER['HTTP_CLIENT_IP'];
		}
		elseif ($this->server('HTTP_X_FORWARDED_FOR'))
		{
			 $this->ip_address = $_SERVER['HTTP_X_FORWARDED_FOR'];
		}
 
		if ($this->ip_address === FALSE)
		{
			$this->ip_address = '0.0.0.0';
			return $this->ip_address;
		}
 
		if (strstr($this->ip_address, ','))
		{
			$x = explode(',', $this->ip_address);
			$this->ip_address = end($x);
		}
 
		if ( ! $this->valid_ip($this->ip_address))
		{
			$this->ip_address = '0.0.0.0';
		}
 
		return $this->ip_address;
	}
}
?>

<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
/*** Extension to Input class to correctly get load balancer http proxy remote ip addresses  ***/
class MY_Input extends CI_Input {
	function ip_address() 	{
 
			// call the core version of the class to get any updates
			// (note this may also break the code below...
			// ...When updating be sure to check the core ip_address() code!)             
 
			$this->ip_address = parent::ip_address();
 
            // let's get a CI instance so we can search config, etc.
            $CI =& get_instance();
 
            $CI->benchmark->mark('custom_ip_address_start');
 
            // let's get the load balancer value of config array, if it exists.
            // Make sure you autoload or call config->load() in your constructor
            // if you use a separate config file.
            $lb_ip = $CI->config->item('load_balancer_ip');
 
            // check to see if we have the load balancer.
            if ( $lb_ip !== FALSE && $this->ip_address == '0.0.0.0' ) {
                // check to see if the original value was the load balancer.
                if ($this->server('REMOTE_ADDR') == $lb_ip) {
                    $is_load_balancer = TRUE;
                }
            // check to see if this ip matches the load balancer ip.
            } elseif ( $lb_ip !== FALSE && $this->ip_address == $lb_ip ) {
                $is_load_balancer = TRUE;
            } else {
                $is_load_balancer = FALSE;
            }
 
            // let's attmept to find the real IP. If load balancer not detected, do nothing.
            if ( $is_load_balancer ) {
                // okay get the result from the header that is sent by the load balancer.
                $lb_header_key = $CI->config->item('load_balancer_header');
                if ( $lb_header_key !== FALSE ) {
                    $real_ip = $this->server($lb_header_key);
                    if ( $this->valid_ip($real_ip)) {
                        $this->ip_address = $real_ip;
                    } else {
                        // IP from load balancer is not valid.
                        $this->ip_address = '0.0.0.0';
                    }
                }
            }
 
            $CI->benchmark->mark('custom_ip_address_end');
 
            return $this->ip_address;
	}
}
?>