--- loncom/lond 2010/11/13 02:21:06 1.446.2.1 +++ loncom/lond 2010/12/19 19:32:49 1.467 @@ -2,7 +2,7 @@ # The LearningOnline Network # lond "LON Daemon" Server (port "LOND" 5663) # -# $Id: lond,v 1.446.2.1 2010/11/13 02:21:06 raeburn Exp $ +# $Id: lond,v 1.467 2010/12/19 19:32:49 www Exp $ # # Copyright Michigan State University Board of Trustees # @@ -58,7 +58,7 @@ my $DEBUG = 0; # Non zero to ena my $status=''; my $lastlog=''; -my $VERSION='$Revision: 1.446.2.1 $'; #' stupid emacs +my $VERSION='$Revision: 1.467 $'; #' stupid emacs my $remoteVERSION; my $currenthostid="default"; my $currentdomainid; @@ -66,7 +66,9 @@ my $currentdomainid; my $client; my $clientip; # IP address of client. my $clientname; # LonCAPA name of client. -my $clientversion; # LonCAPA version running on client +my $clientversion; # LonCAPA version running on client. +my $clienthomedom; # LonCAPA domain of homeID for client. + # primary library server. my $server; @@ -1071,7 +1073,7 @@ sub pong_handler { # Implicit Inputs: # $currenthostid - Global variable that carries the name of the host # known as. -# $clientname - Global variable that carries the name of the hsot we're connected to. +# $clientname - Global variable that carries the name of the host we're connected to. # Returns: # 1 - Ok to continue processing. # 0 - Program should exit. @@ -1110,7 +1112,7 @@ sub establish_key_handler { # Implicit Inputs: # $currenthostid - Global variable that carries the name of the host # known as. -# $clientname - Global variable that carries the name of the hsot we're connected to. +# $clientname - Global variable that carries the name of the host we're connected to. # Returns: # 1 - Ok to continue processing. # 0 - Program should exit. @@ -1119,6 +1121,8 @@ sub establish_key_handler { sub load_handler { my ($cmd, $tail, $replyfd) = @_; + + # Get the load average from /proc/loadavg and calculate it as a percentage of # the allowed load limit as set by the perl global variable lonLoadLim @@ -1147,7 +1151,7 @@ sub load_handler { # Implicit Inputs: # $currenthostid - Global variable that carries the name of the host # known as. -# $clientname - Global variable that carries the name of the hsot we're connected to. +# $clientname - Global variable that carries the name of the host we're connected to. # Returns: # 1 - Ok to continue processing. # 0 - Program should exit @@ -1656,6 +1660,14 @@ sub server_loncaparev_handler { } ®ister_handler("serverloncaparev", \&server_loncaparev_handler, 0, 1, 0); +sub server_homeID_handler { + my ($cmd,$tail,$client) = @_; + my $userinput = "$cmd:$tail"; + &Reply($client,\$perlvar{'lonHostID'},$userinput); + return 1; +} +®ister_handler("serverhomeID", \&server_homeID_handler, 0, 1, 0); + # Process a reinit request. Reinit requests that either # lonc or lond be reinitialized so that an updated # host.tab or domain.tab can be processed. @@ -1765,15 +1777,49 @@ sub authenticate_handler { # upass - User's password. # checkdefauth - Pass to validate_user() to try authentication # with default auth type(s) if no user account. + # clientcancheckhost - Passed by clients with functionality in lonauth.pm + # to check if session can be hosted. - my ($udom, $uname, $upass, $checkdefauth)=split(/:/,$tail); + my ($udom, $uname, $upass, $checkdefauth, $clientcancheckhost)=split(/:/,$tail); &Debug(" Authenticate domain = $udom, user = $uname, password = $upass, checkdefauth = $checkdefauth"); chomp($upass); $upass=&unescape($upass); my $pwdcorrect = &validate_user($udom,$uname,$upass,$checkdefauth); if($pwdcorrect) { - &Reply( $client, "authorized\n", $userinput); + my $canhost = 1; + unless ($clientcancheckhost) { + my $uprimary_id = &Apache::lonnet::domain($udom,'primary'); + my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id); + my @intdoms; + my $internet_names = &Apache::lonnet::get_internet_names($clientname); + if (ref($internet_names) eq 'ARRAY') { + @intdoms = @{$internet_names}; + } + unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) { + my ($remote,$hosted); + my $remotesession = &get_usersession_config($udom,'remotesession'); + if (ref($remotesession) eq 'HASH') { + $remote = $remotesession->{'remote'} + } + my $hostedsession = &get_usersession_config($clienthomedom,'hostedsession'); + if (ref($hostedsession) eq 'HASH') { + $hosted = $hostedsession->{'hosted'}; + } + my $loncaparev = $clientversion; + if ($loncaparev eq '') { + $loncaparev = $Apache::lonnet::loncaparevs{$clientname}; + } + $canhost = &Apache::lonnet::can_host_session($udom,$clientname, + $loncaparev, + $remote,$hosted); + } + } + if ($canhost) { + &Reply( $client, "authorized\n", $userinput); + } else { + &Reply( $client, "not_allowed_to_host\n", $userinput); + } # # Bad credentials: Failed to authorize # @@ -2111,7 +2157,10 @@ sub update_resource_handler { my $transname="$fname.in.transfer"; my $remoteurl=&Apache::lonnet::reply("sub:$fname","$clientname"); my $response; - alarm(120); +# FIXME: cannot replicate files that take more than two minutes to transfer? +# alarm(120); +# FIXME: this should use the LWP mechanism, not internal alarms. + alarm(1200); { my $ua=new LWP::UserAgent; my $request=new HTTP::Request('GET',"$remoteurl"); @@ -2119,11 +2168,13 @@ sub update_resource_handler { } alarm(0); if ($response->is_error()) { +# FIXME: we should probably clean up here instead of just whine unlink($transname); my $message=$response->status_line; &logthis("LWP GET: $message for $fname ($remoteurl)"); } else { if ($remoteurl!~/\.meta$/) { +# FIXME: isn't there an internal LWP mechanism for this? alarm(120); { my $ua=new LWP::UserAgent; @@ -2373,7 +2424,6 @@ sub user_has_session_handler { my ($udom, $uname) = map { &unescape($_) } (split(/:/, $tail)); - &logthis("Looking for $udom $uname"); opendir(DIR,$perlvar{'lonIDsDir'}); my $filename; while ($filename=readdir(DIR)) { @@ -3104,7 +3154,7 @@ sub dump_with_regexp { my $userinput = "$cmd:$tail"; - my ($udom,$uname,$namespace,$regexp,$range)=split(/:/,$tail); + my ($udom,$uname,$namespace,$regexp,$range,$extra)=split(/:/,$tail); if (defined($regexp)) { $regexp=&unescape($regexp); } else { @@ -3122,21 +3172,38 @@ sub dump_with_regexp { } my $hashref = &tie_user_hash($udom, $uname, $namespace, &GDBM_READER()); + my $skipcheck; if ($hashref) { my $qresult=''; my $count=0; + if ($extra ne '') { + $extra = &Apache::lonnet::thaw_unescape($extra); + $skipcheck = $extra->{'skipcheck'}; + } + my @ids = &Apache::lonnet::current_machine_ids(); + my (%homecourses,$major,$minor,$now); + if (($namespace eq 'roles') && (!$skipcheck)) { + my $loncaparev = $clientversion; + if ($loncaparev eq '') { + $loncaparev = $Apache::lonnet::loncaparevs{$clientname}; + } + if ($loncaparev =~ /^\'?(\d+)\.(\d+)\.[\w.\-]+\'?/) { + $major = $1; + $minor = $2; + } + $now = time; + } while (my ($key,$value) = each(%$hashref)) { if ($namespace eq 'roles') { - if ($key =~ m{^/($LONCAPA::match_domain)/($LONCAPA::match_community)_(cc|co|in|ta|ep|ad|st|cr)}) { + if ($key =~ m{^/($LONCAPA::match_domain)/($LONCAPA::match_courseid)(/?[^_]*)_(cc|co|in|ta|ep|ad|st|cr)$}) { my $cdom = $1; my $cnum = $2; - if ($clientversion =~ /^['"]?(\d+)\.(\d+)[.\d\-]+['"]?$/) { - my $major = $1; - my $minor = $2; - next if (($major < 2) || (($major == 2) && ($minor < 9))); - } else { - my $homeserver = &Apache::lonnet::homeserver($cnum,$cdom); - next unless ($currenthostid eq $homeserver); + unless ($skipcheck) { + my ($role,$end,$start) = split(/\_/,$value); + if (!$end || $end > $now) { + next unless (&releasereqd_check($cnum,$cdom,$key,$value,$major, + $minor,\%homecourses,\@ids)); + } } } } @@ -3156,6 +3223,12 @@ sub dump_with_regexp { } } if (&untie_user_hash($hashref)) { + if (($namespace eq 'roles') && (!$skipcheck)) { + if (keys(%homecourses) > 0) { + $qresult .= &check_homecourses(\%homecourses,$udom,$regexp,$count, + $range,$start,$end,$major,$minor); + } + } chop($qresult); &Reply($client, \$qresult, $userinput); } else { @@ -4206,6 +4279,7 @@ sub put_domain_handler { sub get_domain_handler { my ($cmd, $tail, $client) = @_; + my $userinput = "$client:$tail"; my ($udom,$namespace,$what)=split(/:/,$tail,3); @@ -4350,7 +4424,8 @@ sub get_id_handler { sub put_dcmail_handler { my ($cmd,$tail,$client) = @_; my $userinput = "$cmd:$tail"; - + + my ($udom,$what)=split(/:/,$tail); chomp($what); my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT()); @@ -4614,7 +4689,7 @@ sub tmp_put_handler { } my ($id,$store); $tmpsnum++; - if ($context eq 'resetpw') { + if (($context eq 'resetpw') || ($context eq 'createaccount')) { $id = &md5_hex(&md5_hex(time.{}.rand().$$)); } else { $id = $$.'_'.$clientip.'_'.$tmpsnum; @@ -6161,7 +6236,7 @@ sub logstatus { sub initnewstatus { my $docdir=$perlvar{'lonDocRoot'}; my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt"); - my $now=time; + my $now=time(); my $local=localtime($now); print $fh "LOND status $local - parent $$\n\n"; opendir(DIR,"$docdir/lon-status/londchld"); @@ -6250,6 +6325,7 @@ $SIG{USR2} = \&UpdateHosts; # Read the host hashes: &Apache::lonnet::load_hosts_tab(); +my %iphost = &Apache::lonnet::get_iphost(1); my $dist=`$perlvar{'lonDaemons'}/distprobe`; @@ -6310,7 +6386,7 @@ sub make_new_child { or die "Can't unblock SIGINT for fork: $!\n"; $children{$pid} = $clientip; &status('Started child '.$pid); - close($client); + close($client); return; } else { # Child can *not* return from this subroutine. @@ -6467,6 +6543,9 @@ sub make_new_child { # ------------------------------------------------------------ Process requests my $keep_going = 1; my $user_input; + my $clienthost = &Apache::lonnet::hostname($clientname); + my $clientserverhomeID = &Apache::lonnet::get_server_homeID($clienthost); + $clienthomedom = &Apache::lonnet::host_domain($clientserverhomeID); while(($user_input = get_request) && $keep_going) { alarm(120); Debug("Main: Got $user_input\n"); @@ -7212,6 +7291,182 @@ sub version { return "version:$VERSION"; } +sub get_usersession_config { + my ($dom,$name) = @_; + my ($usersessionconf,$cached)=&Apache::lonnet::is_cached_new($name,$dom); + if (defined($cached)) { + return $usersessionconf; + } else { + my %domconfig = &Apache::lonnet::get_dom('configuration',['usersessions'],$dom); + if (ref($domconfig{'usersessions'}) eq 'HASH') { + &Apache::lonnet::do_cache_new($name,$dom,$domconfig{'usersessions'},3600); + return $domconfig{'usersessions'}; + } + } + return; +} + +sub releasereqd_check { + my ($cnum,$cdom,$key,$value,$major,$minor,$homecourses,$ids) = @_; + my $home = &Apache::lonnet::homeserver($cnum,$cdom); + return if ($home eq 'no_host'); + my ($reqdmajor,$reqdminor,$displayrole); + if ($cnum =~ /$LONCAPA::match_community/) { + if ($major eq '' && $minor eq '') { + return unless ((ref($ids) eq 'ARRAY') && + (grep(/^\Q$home\E$/,@{$ids}))); + } else { + $reqdmajor = 2; + $reqdminor = 9; + return unless (&useable_role($reqdmajor,$reqdminor,$major,$minor)); + } + } + my $hashid = $cdom.':'.$cnum; + my ($courseinfo,$cached) = + &Apache::lonnet::is_cached_new('courseinfo',$hashid); + if (defined($cached)) { + if (ref($courseinfo) eq 'HASH') { + if (exists($courseinfo->{'releaserequired'})) { + my ($reqdmajor,$reqdminor) = split(/\./,$courseinfo->{'releaserequired'}); + return unless (&useable_role($reqdmajor,$reqdminor,$major,$minor)); + } + } + } else { + if (ref($ids) eq 'ARRAY') { + if (grep(/^\Q$home\E$/,@{$ids})) { + if (ref($homecourses) eq 'HASH') { + if (ref($homecourses->{$hashid}) eq 'ARRAY') { + push(@{$homecourses->{$hashid}},{$key=>$value}); + } else { + $homecourses->{$hashid} = [{$key=>$value}]; + } + } + return; + } + } + my $courseinfo = &get_courseinfo_hash($cnum,$cdom,$home); + if (ref($courseinfo) eq 'HASH') { + if (exists($courseinfo->{'releaserequired'})) { + my ($reqdmajor,$reqdminor) = split(/\./,$courseinfo->{'releaserequired'}); + return unless (&useable_role($reqdmajor,$reqdminor,$major,$minor)); + } + } else { + return; + } + } + return 1; +} + +sub get_courseinfo_hash { + my ($cnum,$cdom,$home) = @_; + my %info; + eval { + local($SIG{ALRM}) = sub { die "timeout\n"; }; + local($SIG{__DIE__})='DEFAULT'; + alarm(3); + %info = &Apache::lonnet::courseiddump($cdom,'.',1,'.','.',$cnum,1,[$home],'.'); + alarm(0); + }; + if ($@) { + if ($@ eq "timeout\n") { + &logthis("WARNING courseiddump for $cnum:$cdom from $home timedout"); + } else { + &logthis("WARNING unexpected error during eval of call for courseiddump from $home"); + } + } else { + if (ref($info{$cdom.'_'.$cnum}) eq 'HASH') { + my $hashid = $cdom.':'.$cnum; + return &Apache::lonnet::do_cache_new('courseinfo',$hashid,$info{$cdom.'_'.$cnum},600); + } + } + return; +} + +sub check_homecourses { + my ($homecourses,$udom,$regexp,$count,$range,$start,$end,$major,$minor) = @_; + my ($result,%addtocache); + my $yesterday = time - 24*3600; + if (ref($homecourses) eq 'HASH') { + my (%okcourses,%courseinfo,%recent); + my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT()); + if ($hashref) { + while (my ($key,$value) = each(%$hashref)) { + my $unesc_key = &unescape($key); + if ($unesc_key =~ /^lasttime:(\w+)$/) { + my $cid = $1; + $cid =~ s/_/:/; + if ($value > $yesterday ) { + $recent{$cid} = 1; + } + next; + } + my $items = &Apache::lonnet::thaw_unescape($value); + if (ref($items) eq 'HASH') { + my $hashid = $unesc_key; + $hashid =~ s/_/:/; + $courseinfo{$hashid} = $items; + if (ref($homecourses->{$hashid}) eq 'ARRAY') { + my ($reqdmajor,$reqdminor) = split(/\./,$items->{'releaserequired'}); + if (&useable_role($reqdmajor,$reqdminor,$major,$minor)) { + $okcourses{$hashid} = 1; + } + } + } + } + unless (&untie_domain_hash($hashref)) { + &logthis('Failed to untie tied hash for nohist_courseids.db'); + } + } else { + &logthis('Failed to tie hash for nohist_courseids.db'); + return; + } + foreach my $hashid (keys(%recent)) { + my ($result,$cached)=&Apache::lonnet::is_cached_new('courseinfo',$hashid); + unless ($cached) { + &Apache::lonnet::do_cache_new('courseinfo',$hashid,$courseinfo{$hashid},600); + } + } + foreach my $hashid (keys(%{$homecourses})) { + next if ($recent{$hashid}); + &Apache::lonnet::do_cache_new('courseinfo',$hashid,$courseinfo{$hashid},600); + } + foreach my $hashid (keys(%okcourses)) { + if (ref($homecourses->{$hashid}) eq 'ARRAY') { + foreach my $role (@{$homecourses->{$hashid}}) { + if (ref($role) eq 'HASH') { + while (my ($key,$value) = each(%{$role})) { + if ($regexp eq '.') { + $count++; + if (defined($range) && $count >= $end) { last; } + if (defined($range) && $count < $start) { next; } + $result.=$key.'='.$value.'&'; + } else { + my $unescapeKey = &unescape($key); + if (eval('$unescapeKey=~/$regexp/')) { + $count++; + if (defined($range) && $count >= $end) { last; } + if (defined($range) && $count < $start) { next; } + $result.="$key=$value&"; + } + } + } + } + } + } + } + } + return $result; +} + +sub useable_role { + my ($reqdmajor,$reqdminor,$major,$minor) = @_; + if ($reqdmajor ne '' && $reqdminor ne '') { + return if (($major eq '' && $minor eq '') || + ($major < $reqdmajor) || + (($major == $reqdmajor) && ($minor < $reqdminor))); + } + return 1; +} # ----------------------------------- POD (plain old documentation, CPAN style)