--- loncom/auth/lonracc.pm	2005/02/06 07:23:40	1.15
+++ loncom/auth/lonracc.pm	2008/11/12 20:01:09	1.23
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # Access Handler for File Transfers
 #
-# $Id: lonracc.pm,v 1.15 2005/02/06 07:23:40 albertel Exp $
+# $Id: lonracc.pm,v 1.23 2008/11/12 20:01:09 jms Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -26,71 +26,7 @@
 # http://www.lon-capa.org/
 #
 
-package Apache::lonracc;
-
-use strict;
-use Apache::Constants qw(:common :remotehost);
-use Apache::lonnet();
-use Apache::File();
-use IO::Socket;
-
-sub subscribed {
-    my ($filename,$id) = @_;
-    my $found=0;
-    my $hostname=$Apache::lonnet::hostname{$id};
-    my (undef,undef,undef,undef,$ip) = gethostbyname($hostname);
-    $ip=inet_ntoa($ip);
-    my $expr='^'.$id.':'.$ip.':';
-    $expr =~ s/\./\\\./g;
-    my $sh;
-    if ($sh=Apache::File->new("$filename.subscription")) {
-	while (my $subline=<$sh>) { if ($subline =~ /$expr/) { $found=1; } }
-	$sh->close();
-    }
-    return $found;
-}
-
-sub handler {
-    my $r = shift;
-    my $reqhost = $r->get_remote_host(REMOTE_NOLOOKUP);
-    my $netaddr=inet_aton($reqhost);
-    ($reqhost) = gethostbyaddr($netaddr,AF_INET);
-    if (!$reqhost) {
-	$r->log_reason("Unable to do hostname $reqhost lookup for ".$r->get_remote_host(REMOTE_NOLOOKUP));
-	return FORBIDDEN;
-    }
-    if ($reqhost eq 'localhost.localdomain') {
-	return OK;
-    }
-    my $return;
-    my @ids=();
-    my $id;
-    foreach $id (keys %Apache::lonnet::hostname) {
-	if ($Apache::lonnet::hostname{$id} =~ /^\Q$reqhost\E$/i) {
-	    my $filename=$r->filename;
-	    my $uri =$r->uri;
-	    if ((-e "$filename.$id") ||
-		&subscribed($filename,$id) ||
-		($filename=~/\.meta$/) ||
-		($uri=~m|^/raw/uploaded|)) {
-		return OK;
-	    } else {
-		$return=FORBIDDEN;
-		push(@ids,$id);
-	    }
-	}
-    }
-    if ($return == FORBIDDEN) {
-	$r->log_reason(join(':',@ids)." not subscribed", $r->filename);
-	return FORBIDDEN;
-    }
-    $r->log_reason("Invalid request for file transfer from $reqhost", 
-                   $r->filename); 
-    return FORBIDDEN;
-}
-
-1;
-__END__
+=pod
 
 =head1 NAME
 
@@ -137,6 +73,83 @@ access.
 
 =cut
 
+package Apache::lonracc;
+
+use strict;
+use Apache::Constants qw(:common :remotehost);
+use Apache::lonnet;
+use Apache::File();
+use IO::Socket;
+
+sub subscribed {
+    my ($filename,$id) = @_;
+
+    return 0 if (!-e "$filename.subscription");
+
+    my $hostname=&Apache::lonnet::hostname($id);
+    my (undef,undef,undef,undef,$ip) = gethostbyname($hostname);
+    
+    return 0 if (length($ip) != 4);
+
+    $ip=inet_ntoa($ip);
+
+    my $expr='^'.quotemeta($id).':'.quotemeta($ip).':';
+
+    my $found=0;
+    if (my $sh=Apache::File->new("$filename.subscription")) {
+	while (my $subline=<$sh>) { if ($subline =~ /$expr/) { $found=1; } }
+	$sh->close();
+    }
+    return $found;
+}
+
+sub handler {
+    my $r = shift;
+
+    my $filename=$r->filename;
+    if (!-e $filename) {
+	return NOT_FOUND;
+    }
+
+    my $reqhost = $r->get_remote_host(REMOTE_NOLOOKUP);
+    my @hostids= &Apache::lonnet::get_hosts_from_ip($reqhost);
+    if (!@hostids && $reqhost ne '127.0.0.1' ) {
+	$r->log_reason("Unable to find a host for ".
+		       $r->get_remote_host(REMOTE_NOLOOKUP));
+	return FORBIDDEN;
+    }
+    if ($reqhost eq '127.0.0.1') {
+	return OK;
+    }
+    my $return;
+    my @ids;
+
+    foreach my $id (@hostids) {
+	my $uri =$r->uri;
+	if (($filename=~/\.meta$/) ||
+	    ($uri=~m|^/raw/uploaded|) ||
+	    (-e "$filename.$id") ||
+	    &subscribed($filename,$id) ) {
+	    return OK;
+	} else {
+	    $return=FORBIDDEN;
+	    push(@ids,$id);
+	}
+    }
+    if ($return == FORBIDDEN) {
+	$r->log_reason(join(':',@ids)." not subscribed", $r->filename);
+	return FORBIDDEN;
+    }
+    $r->log_reason("Invalid request for file transfer from $reqhost", 
+                   $r->filename); 
+    return FORBIDDEN;
+}
+
+1;
+__END__
+
+
+