--- loncom/auth/lonracc.pm 2002/01/17 19:25:31 1.4 +++ loncom/auth/lonracc.pm 2007/03/02 23:17:48 1.21 @@ -1,7 +1,7 @@ # The LearningOnline Network # Access Handler for File Transfers # -# $Id: lonracc.pm,v 1.4 2002/01/17 19:25:31 harris41 Exp $ +# $Id: lonracc.pm,v 1.21 2007/03/02 23:17:48 albertel Exp $ # # Copyright Michigan State University Board of Trustees # @@ -25,45 +25,74 @@ # # http://www.lon-capa.org/ # -# (lonacc: Cookie Based Access Handler -# 5/21/99,5/22,5/29,5/31,6/15 Gerd Kortemeyer) -# 6/16,6/18,7/3, -# 6/30/00 Gerd Kortemeyer 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 $reqhost; - unless ($reqhost=$r->get_remote_host(REMOTE_DOUBLE_REV)) { - $r->log_reason("Spoof request"); - return FORBIDDEN; - } - my $readline; - my $lontabdir=$r->dir_config('lonTabDir'); - { - my $fh; - unless ($fh=Apache::File->new("$lontabdir/hosts.tab")) { - $r->log_reason("Could not find host tab file"); - return FORBIDDEN; - } - while ($readline=<$fh>) { - my ($id,$domain,$role,$name,$ip)=split(/:/,$readline); - if ($name =~ /$reqhost/i) { - my $filename=$r->filename; - if ((-e "$filename.$id") || ($filename=~/\.meta$/)) { - return OK; - } else { - $r->log_reason("$id not subscribed", $r->filename); - return FORBIDDEN; - } - } - } + my $filename=$r->filename; + if (!-e $filename) { + return NOT_FOUND; + } + + my $reqhost = $r->get_remote_host(REMOTE_NOLOOKUP); + my %iphost=&Apache::lonnet::get_iphost(); + my $hostids=$iphost{$reqhost}; + if (!$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);