function _sf_notifications_cidr_match in Salesforce Suite 7.2

Same name and namespace in other branches

1. 6.2 sf_notifications/sf_notifications.module \_sf_notifications_cidr_match()

Given a CIDR mask and an IP address, return TRUE or FALSE if the IP address matches or doesn't match the CIDR mask. Adapted from http://stackoverflow.com/questions/594112

1 call to _sf_notifications_cidr_match()

sf_notifications_allowed_ips in sf_notifications/sf_notifications.module

Access callback for SALESFORCE_PATH_NOTIFICATIONS_ENDPOINT

File

sf_notifications/sf_notifications.module, line 92

Code

function _sf_notifications_cidr_match($ip, $range) {
  list($subnet, $bits) = explode('/', $range);
  $ip = ip2long($ip);
  $subnet = ip2long($subnet);

  // Sanity check: ip2long() returns FALSE for an invalid IP address.
  if (empty($subnet) || empty($bits) || empty($ip)) {
    return FALSE;
  }
  $mask = -1 << 32 - $bits;
  $subnet &= $mask;

  // in case the supplied subnet wasn't correctly aligned
  return ($ip & $mask) == $subnet;
}