function _httpbl_ip_address in http:BL 5

Backport of Drupal 6's ip_address() function.

4 calls to _httpbl_ip_address()

httpbl_blacklisted in ./httpbl.module

Check if an IP should be banned

httpbl_request_whitelist_submit in ./httpbl.module

httpbl_request_whitelist_validate in ./httpbl.module

_httpbl_check in ./httpbl.module

The actual checking function.

File

./httpbl.module, line 724

Implementation of http:BL for Drupal. It provides IP-based blacklisting through http:BL and allows linking to a honeypot.

Code

function _httpbl_ip_address() {
  static $ip_address = NULL;
  if (!isset($ip_address)) {
    $ip_address = $_SERVER['REMOTE_ADDR'];
    if (variable_get('reverse_proxy', 0) && array_key_exists('HTTP_X_FORWARDED_FOR', $_SERVER)) {

      // If an array of known reverse proxy IPs is provided, then trust
      // the XFF header if request really comes from one of them.
      $reverse_proxy_addresses = variable_get('reverse_proxy_addresses', array());
      if (!empty($reverse_proxy_addresses) && in_array($ip_address, $reverse_proxy_addresses, TRUE)) {

        // If there are several arguments, we need to check the most
        // recently added one, i.e. the last one.
        $ip_address = array_pop(explode(',', $_SERVER['HTTP_X_FORWARDED_FOR']));
      }
    }
  }
  return $ip_address;
}