--- loncom/lonnet/perl/lonnet.pm	2007/09/25 00:21:12	1.913
+++ loncom/lonnet/perl/lonnet.pm	2007/09/29 04:03:51	1.914
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # TCP networking package
 #
-# $Id: lonnet.pm,v 1.913 2007/09/25 00:21:12 albertel Exp $
+# $Id: lonnet.pm,v 1.914 2007/09/29 04:03:51 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -582,6 +582,27 @@ sub compare_server_load {
     }
     return ($spare_server,$lowest_load);
 }
+
+# --------------------------- ask offload servers if user already has a session
+sub find_existing_session {
+    my ($udom,$uname) = @_;
+    foreach my $try_server (@{ $spareid{'primary'} },
+			    @{ $spareid{'default'} }) {
+	return $try_server if (&has_user_session($try_server, $udom, $uname));
+    }
+    return;
+}
+
+# -------------------------------- ask if server already has a session for user
+sub has_user_session {
+    my ($lonid,$udom,$uname) = @_;
+    my $result = &reply(join(':','userhassession',
+			     map {&escape($_)} ($udom,$uname)),$lonid);
+    return 1 if ($result eq 'ok');
+
+    return 0;
+}
+
 # --------------------------------------------- Try to change a user's password
 
 sub changepass {