--- loncom/auth/lonauth.pm	2013/08/21 16:15:44	1.126
+++ loncom/auth/lonauth.pm	2013/09/29 00:49:24	1.127
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # User Authentication Module
 #
-# $Id: lonauth.pm,v 1.126 2013/08/21 16:15:44 bisitz Exp $
+# $Id: lonauth.pm,v 1.127 2013/09/29 00:49:24 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -259,7 +259,7 @@ sub handler {
        $value =~ tr/+/ /;
        $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
        $form{$name}=$value;
-    } 
+    }
 
     if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) {
 	&failed($r,'Username, password and domain need to be specified.',
@@ -284,6 +284,12 @@ sub handler {
     my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'},
                                       $form{'serverid'});
 
+    my %sessiondata;
+    if ($form{'iptoken'}) {
+        %sessiondata = &Apache::lonnet::tmpget($form{'iptoken'});
+        my $delete = &Apache::lonnet::tmpdel($form{'token'});
+    }
+
     if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') || 
         ($tmpinfo eq 'no_such_host')) {
 	&failed($r,'Information needed to verify your login information is missing, inaccessible or expired.',\%form);
@@ -396,6 +402,15 @@ sub handler {
 	($firsturl=~/^\/adm\/(logout|remote)/)) {
 	$firsturl='/adm/roles';
     }
+
+    my $hosthere;
+    if ($form{'iptoken'}) {
+        if (($sessiondata{'domain'} eq $form{'udom'}) &&
+            ($sessiondata{'username'} eq $form{'uname'})) {
+            $hosthere = 1;
+        }
+    }
+
 # --------------------------------- Are we attempting to login as somebody else?
     if ($form{'suname'}) {
 # ------------ see if the original user has enough privileges to pull this stunt
@@ -419,8 +434,12 @@ sub handler {
 	}
     }
 
-    my ($is_balancer,$otherserver) = 
-        &Apache::lonnet::check_loadbalancing($form{'uname'},$form{'udom'});
+    my ($is_balancer,$otherserver);
+
+    unless ($hosthere) {
+        ($is_balancer,$otherserver) =
+            &Apache::lonnet::check_loadbalancing($form{'uname'},$form{'udom'});
+    }
 
     if ($is_balancer) {
         if (!$otherserver) {