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安全加强，dfsockopen 屏蔽局域网ip

This commit is contained in:
Comsenz 2018-03-26 16:54:47 +08:00
parent f14b6f8bbe
commit 9103a22339
1 changed files with 12 additions and 0 deletions
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12
upload/source/function/function_filesock.php
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@ -11,11 +11,23 @@ if(!defined('IN_DISCUZ')) {
exit('Access Denied'); exit('Access Denied');
} }
function _isLocalip($ip) {
$iplong = ip2long($ip);
return ($iplong >= 167772160 && $iplong <= 184549375) ||
($iplong >= 2886729728 && $iplong <= 2887778303) ||
($iplong >= 1681915904 && $iplong <= 1686110207) ||
($iplong >= 3232235520 && $iplong <= 3232301055) ||
($iplong >= 150994944 && $iplong <= 167772159);
}
function _dfsockopen($url, $limit = 0, $post = '', $cookie = '', $bysocket = FALSE, $ip = '', $timeout = 15, $block = TRUE, $encodetype = 'URLENCODE', $allowcurl = TRUE, $position = 0, $files = array()) { function _dfsockopen($url, $limit = 0, $post = '', $cookie = '', $bysocket = FALSE, $ip = '', $timeout = 15, $block = TRUE, $encodetype = 'URLENCODE', $allowcurl = TRUE, $position = 0, $files = array()) {
$return = ''; $return = '';
$matches = parse_url($url); $matches = parse_url($url);
$scheme = $matches['scheme']; $scheme = $matches['scheme'];
$host = $matches['host']; $host = $matches['host'];
if(filter_var($host, FILTER_VALIDATE_IP) && _isLocalip($host) || $ip && _isLocalip($ip)) {
return '';
}
$path = $matches['path'] ? $matches['path'].($matches['query'] ? '?'.$matches['query'] : '') : '/'; $path = $matches['path'] ? $matches['path'].($matches['query'] ? '?'.$matches['query'] : '') : '/';
$port = !empty($matches['port']) ? $matches['port'] : ($scheme == 'http' ? '80' : ''); $port = !empty($matches['port']) ? $matches['port'] : ($scheme == 'http' ? '80' : '');
$boundary = $encodetype == 'URLENCODE' ? '' : random(40); $boundary = $encodetype == 'URLENCODE' ? '' : random(40);