mirror of
https://github.com/WhatCD/Gazelle.git
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42 lines
1.1 KiB
PHP
42 lines
1.1 KiB
PHP
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<?
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if(isset($_SERVER['http_if_modified_since'])) {
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header("Status: 304 Not Modified");
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die();
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}
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header('Expires: '.date('D, d-M-Y H:i:s \U\T\C',time()+3600*24*120)); //120 days
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header('Last-Modified: '.date('D, d-M-Y H:i:s \U\T\C',time()));
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if(!check_perms('users_view_ips')) { die('Access denied.'); }
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$Octets = explode(".", $_GET['ip']);
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if(
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empty($_GET['ip']) ||
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!preg_match('/\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}/', $_GET['ip']) ||
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$Octets[0] < 0 ||
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$Octets[0] > 255 ||
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$Octets[1] < 0 ||
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$Octets[1] > 255 ||
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$Octets[2] < 0 ||
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$Octets[2] > 255 ||
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$Octets[3] < 0 ||
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$Octets[3] > 255 ||
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$Octets[0] == 127 ||
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($Octets[0] == 192 && $Octets[1] == 168)
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) {
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die('Invalid IP.');
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}
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$Output = explode(' ',shell_exec('host -W 1 '.escapeshellarg($_GET['ip'])));
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if(count($Output) == 1 && empty($Output[0])) {
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//No output at all implies the command failed
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trigger_error("get_host() command failed with no output, ensure that the host command exists on your system and accepts the argument -W");
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}
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if(count($Output)!=5) {
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die('Could not retrieve host.');
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} else {
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die($Output[4]);
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}
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