As If [asif]

I am adding the review tag.

1.   version = "6.x-1.0"
   

   That line should be removed.

2. See the Drupal coding standards to understand how a module code should be written.

3.   if(!$may_cache) {
       $items = array();
   

   $may_cache is not defined.

4.     '#prefix' => 'Enter a destination for miscreants. If using a remote address, the full URL (including http://) must be used.  For a local destination, simply use the path beginning with a slash.',
   

   The string is not translatable.

5.   if ($ban_success) {
       $msg = 'Banned IP: %ip';
       $vars = array('%ip' => $banned_ip);
       watchdog('goaway', $msg, $vars, WATCHDOG_INFO);
       drupal_set_message(t('Banned IP: ' . $banned_ip));
     }
     else {
       $msg = 'Failed to ban IP: ' . $ip;
   

   The code should use a placeholder, as the previous call to watchdog() did.

6.   $schema['goaway'] = array(
       'fields' => array(
         'gid' => array(
           'description' => t('Identifier for a ban.'),
   

   The schema descriptions should not be passed to t() anymore.

1. /**
    * Implements hook_access()
    */
   function goaway_init() {
   

2. function goaway_banlist_form_validate($form, &$form_state) {
     // TODO: REGEXP FOR IP ADDRESS FORMAT
     $goaway_banlist = $form_state['values']['goaway_banlist'];
     if (isset($goaway_banlist)) {
       if (!is_string($goaway_banlist) || $goaway_banlist == '') {
         form_set_error('goaway_banlist', t('Error while handling data submitted'));
       }
     }
   }
   

   The error message should be something clearer; saying that an error has occurred doesn't help much.

To complete the information I have given, I will report that base_path() is used when the path is used to build a URL returned to the browser.

The underscore is added by Drupal, as the double extension could be used to hide the true type of the file (especially in Windows where the extension is normally hidden, and the user would see a .jpg, when the extension is really .jpg.exe.