diff options
Diffstat (limited to 'system/core/Input.php')
| -rwxr-xr-x | system/core/Input.php | 63 |
1 files changed, 31 insertions, 32 deletions
diff --git a/system/core/Input.php b/system/core/Input.php index 3559d8607..66e02ba00 100755 --- a/system/core/Input.php +++ b/system/core/Input.php @@ -73,13 +73,13 @@ class CI_Input { */ protected $headers = array(); - /** * Constructor * * Sets whether to globally enable the XSS processing * and whether to allow the $_GET array * + * @return void */ public function __construct() { @@ -306,50 +306,49 @@ class CI_Input { /** * Fetch the IP Address * - * @access public * @return string */ - function ip_address() + public function ip_address() { if ($this->ip_address !== FALSE) { return $this->ip_address; } - if (config_item('proxy_ips') != '' && $this->server('HTTP_X_FORWARDED_FOR') && $this->server('REMOTE_ADDR')) + $proxy_ips = config_item('proxy_ips'); + if ( ! empty($proxy_ips)) { - $proxies = preg_split('/[\s,]/', config_item('proxy_ips'), -1, PREG_SPLIT_NO_EMPTY); - $proxies = is_array($proxies) ? $proxies : array($proxies); + $proxy_ips = explode(',', str_replace(' ', '', $proxy_ips)); + foreach (array('HTTP_X_FORWARDED_FOR', 'HTTP_CLIENT_IP', 'HTTP_X_CLIENT_IP', 'HTTP_X_CLUSTER_CLIENT_IP') as $header) + { + if (($spoof = $this->server($header)) !== FALSE) + { + // Some proxies typically list the whole chain of IP + // addresses through which the client has reached us. + // e.g. client_ip, proxy_ip1, proxy_ip2, etc. + if (strpos($spoof, ',') !== FALSE) + { + $spoof = explode(',', $spoof, 2); + $spoof = $spoof[0]; + } - $this->ip_address = in_array($_SERVER['REMOTE_ADDR'], $proxies) ? $_SERVER['HTTP_X_FORWARDED_FOR'] : $_SERVER['REMOTE_ADDR']; - } - elseif ($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 ( ! $this->valid_ip($spoof)) + { + $spoof = NULL; + } + else + { + break; + } + } + } - if ($this->ip_address === FALSE) - { - $this->ip_address = '0.0.0.0'; - return $this->ip_address; + $this->ip_address = ($spoof !== NULL && in_array($_SERVER['REMOTE_ADDR'], $proxy_ips, TRUE)) + ? $spoof : $_SERVER['REMOTE_ADDR']; } - - if (strpos($this->ip_address, ',') !== FALSE) + else { - $x = explode(',', $this->ip_address); - $this->ip_address = trim(end($x)); + $this->ip_address = $_SERVER['REMOTE_ADDR']; } if ( ! $this->valid_ip($this->ip_address)) |