# HG changeset patch
# User Nathan Phillip Brink <ohnobinki@ohnopublishing.net>
# Date 2011-10-14 20:29:39
# Node ID df7edf936f219a68e05e20e6c3929769ffd4a8c0
# Parent  256650e361e6c477cac0dce3228dfb2d18f524f2

Support the case where REMOTE_HOST is the same as REMOTE_ADDR.

diff --git a/inc/school.inc b/inc/school.inc
--- a/inc/school.inc
+++ b/inc/school.inc
@@ -150,7 +150,9 @@ function school_load_guess($update_sessi
   if (isset($_SERVER['REMOTE_HOST']) || isset($_SERVER['REMOTE_ADDR']))
     {
       $addr = NULL;
-      if (!isset($_SERVER['REMOTE_HOST']))
+      /* http://ietf.org/rfc/rfc3875 */
+      if (!isset($_SERVER['REMOTE_HOST'])
+	  || !strcmp($_SERVER['REMOTE_HOST'], $_SERVER['REMOTE_ADDR']))
 	$addr = gethostbyaddr($_SERVER['REMOTE_ADDR']);
 
       $cache = _school_cache_load();