From 83a9e5c76fad3771c12ca955c673c49c52d81e24 Mon Sep 17 00:00:00 2001
From: Comsenz <10433182@qq.com>
Date: Mon, 4 Jun 2018 18:16:47 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BF=AE=E5=A4=8D=20=E8=80=83=E8=99=91=20filte?=
 =?UTF-8?q?r=5Fvar=20=E4=B8=8D=E5=AD=98=E5=9C=A8=E7=9A=84=E6=83=85?=
 =?UTF-8?q?=E5=86=B5?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 upload/source/function/function_filesock.php | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/upload/source/function/function_filesock.php b/upload/source/function/function_filesock.php
index 2a2eb8e..c45251d 100644
--- a/upload/source/function/function_filesock.php
+++ b/upload/source/function/function_filesock.php
@@ -20,12 +20,20 @@ function _isLocalip($ip) {
 		($iplong >= 150994944 && $iplong <= 167772159);
 }
 
+function _isip($host) {
+	if(function_exists('filter_var')) {
+		return filter_var($host, FILTER_VALIDATE_IP) !== false;
+	} else {
+		return preg_match('/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/', $host);
+	}
+}
+
 function _dfsockopen($url, $limit = 0, $post = '', $cookie = '', $bysocket = FALSE, $ip = '', $timeout = 15, $block = TRUE, $encodetype  = 'URLENCODE', $allowcurl = TRUE, $position = 0, $files = array()) {
 	$return = '';
 	$matches = parse_url($url);
 	$scheme = $matches['scheme'];
 	$host = $matches['host'];
-	if(filter_var($host, FILTER_VALIDATE_IP) && _isLocalip($host) || $ip && _isLocalip($ip)) {
+	if(_isip($host) && _isLocalip($host) || $ip && _isLocalip($ip)) {
 		return '';
 	}
 	$path = $matches['path'] ? $matches['path'].($matches['query'] ? '?'.$matches['query'] : '') : '/';