From d13dc4ac8cebc2a71eb6fde930511809add33b8f Mon Sep 17 00:00:00 2001
From: mjollnir_ <mjollnir_>
Date: Thu, 18 Aug 2005 01:44:47 +0000
Subject: [PATCH] merged from MOODLE_15_STABLE: Clean up IP addresses from
 getremoteaddr. Otherwise we sometimes get weird results from proxies and
 inserts into mdl_log and mdl_user fail

---
 lib/moodlelib.php | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/lib/moodlelib.php b/lib/moodlelib.php
index 911d0453332..f853d2821f1 100644
--- a/lib/moodlelib.php
+++ b/lib/moodlelib.php
@@ -6334,17 +6334,24 @@ function unzip_show_status ($list,$removepath) {
  */
  function getremoteaddr() {
     if (!empty($_SERVER['HTTP_CLIENT_IP'])) {
-        return $_SERVER['HTTP_CLIENT_IP'];
+        return cleanremoteaddr($_SERVER['HTTP_CLIENT_IP']);
     }
     if (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) {
-        return $_SERVER['HTTP_X_FORWARDED_FOR'];
+        return cleanremoteaddr($_SERVER['HTTP_X_FORWARDED_FOR']);
     }
     if (!empty($_SERVER['REMOTE_ADDR'])) {
-        return $_SERVER['REMOTE_ADDR'];
+        return cleanremoteaddr($_SERVER['REMOTE_ADDR']);
     }
     return '';
 }
 
+/** 
+ * Cleans a remote address ready to put into the log table
+ */
+function cleanremoteaddr($addr) {
+    return preg_replace('/(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})(.*)/','$1',$addr);
+}
+
 /**
  * html_entity_decode is only supported by php 4.3.0 and higher
  * so if it is not predefined, define it here