--- loncom/lonnet/perl/lonnet.pm	2019/01/27 16:02:58	1.1402
+++ loncom/lonnet/perl/lonnet.pm	2023/10/06 01:22:06	1.1516
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # TCP networking package
 #
-# $Id: lonnet.pm,v 1.1402 2019/01/27 16:02:58 raeburn Exp $
+# $Id: lonnet.pm,v 1.1516 2023/10/06 01:22:06 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -77,9 +77,9 @@ use CGI::Cookie;
 
 use Encode;
 
-use vars qw(%perlvar %spareid %pr %prp $memcache %packagetab $tmpdir
+use vars qw(%perlvar %spareid %pr %prp $memcache %packagetab $tmpdir $deftex
             $_64bit %env %protocol %loncaparevs %serverhomeIDs %needsrelease
-            %managerstab);
+            %managerstab $passwdmin);
 
 my (%badServerCache, $memcache, %courselogs, %accesshash, %domainrolehash,
     %userrolehash, $processmarker, $dumpcount, %coursedombuf,
@@ -96,11 +96,14 @@ use Cache::Memcached;
 use Digest::MD5;
 use Math::Random;
 use File::MMagic;
+use Net::CIDR;
+use Sys::Hostname::FQDN();
 use LONCAPA qw(:DEFAULT :match);
 use LONCAPA::Configuration;
 use LONCAPA::lonmetadata;
 use LONCAPA::Lond;
 use LONCAPA::LWPReq;
+use LONCAPA::transliterate;
 
 use File::Copy;
 
@@ -127,12 +130,13 @@ our @EXPORT = qw(%env);
 	$logid ++;
         my $now = time();
 	my $id=$now.'00000'.$$.'00000'.$logid;
+        my $ip = &get_requestor_ip();
         my $logentry = { 
                           $id => {
                                    'exe_uname' => $env{'user.name'},
                                    'exe_udom'  => $env{'user.domain'},
                                    'exe_time'  => $now,
-                                   'exe_ip'    => $ENV{'REMOTE_ADDR'},
+                                   'exe_ip'    => $ip,
                                    'delflag'   => $delflag,
                                    'logentry'  => $storehash,
                                    'uname'     => $uname,
@@ -411,6 +415,63 @@ sub remote_devalidate_cache {
     return $response;
 }
 
+sub sign_lti {
+    my ($cdom,$cnum,$crsdef,$type,$context,$url,$ltinum,$keynum,$paramsref,$inforef) = @_;
+    my $chome;
+    if (&domain($cdom) ne '') {
+        if ($crsdef) {
+            $chome = &homeserver($cnum,$cdom);
+        } else {
+            $chome = &domain($cdom,'primary');
+        }
+    }
+    if ($cdom && $chome && ($chome ne 'no_host')) {
+        if ((ref($paramsref) eq 'HASH') &&
+            (ref($inforef) eq 'HASH')) {
+            my $rep;
+            if (grep { $_ eq $chome } &current_machine_ids()) {
+                # domain information is hosted on this machine
+                $rep =
+                    &LONCAPA::Lond::sign_lti_payload($cdom,$cnum,$crsdef,$type,
+                                                     $context,$url,$ltinum,$keynum,
+                                                     $perlvar{'lonVersion'},
+                                                     $paramsref,$inforef);
+                if (ref($rep) eq 'HASH') {
+                    return ('ok',$rep);
+                }
+            } else {
+                my ($escurl,$params,$info);
+                $escurl = &escape($url);
+                if (ref($paramsref) eq 'HASH') {
+                    $params = &freeze_escape($paramsref);
+                }
+                if (ref($inforef) eq 'HASH') {
+                    $info = &freeze_escape($inforef);
+                }
+                $rep=&reply("encrypt:signlti:$cdom:$cnum:$crsdef:$type:$context:$escurl:$ltinum:$keynum:$params:$info",$chome);
+            }
+            if (($rep eq '') || ($rep =~ /^con_lost|error|no_such_host|unknown_cmd/i)) {
+                return ();
+            } elsif (($inforef->{'respfmt'} eq 'to_post_body') ||
+                     ($inforef->{'respfmt'} eq 'to_authorization_header')) {
+                return ('ok',$rep);
+            } else {
+                my %returnhash;
+                foreach my $item (split(/\&/,$rep)) {
+                    my ($name,$value)=split(/\=/,$item);
+                    $returnhash{&unescape($name)}=&thaw_unescape($value);
+                }
+                return('ok',\%returnhash);
+            }
+        } else {
+            return ();
+        }
+    } else {
+        return ();
+        &logthis("sign_lti failed - no homeserver and/or domain ($cdom) ($chome)");
+    }
+}
+
 # -------------------------------------------------- Non-critical communication
 sub subreply {
     my ($cmd,$server)=@_;
@@ -464,14 +525,15 @@ sub reply {
             my $subcmd = $1;
             if (($subcmd eq 'auth') || ($subcmd eq 'passwd') ||
                 ($subcmd eq 'changeuserauth') || ($subcmd eq 'makeuser') ||
-                ($subcmd eq 'putdom') || ($subcmd eq 'autoexportgrades')) {
+                ($subcmd eq 'putdom') || ($subcmd eq 'autoexportgrades') ||
+                ($subcmd eq 'put')) {
                 (undef,undef,my @rest) = split(/:/,$cmd);
                 if (($subcmd eq 'auth') || ($subcmd eq 'putdom')) {
                     splice(@rest,2,1,'Hidden');
                 } elsif ($subcmd eq 'passwd') {
                     splice(@rest,2,2,('Hidden','Hidden'));
                 } elsif (($subcmd eq 'changeuserauth') || ($subcmd eq 'makeuser') ||
-                         ($subcmd eq 'autoexportgrades')) {
+                         ($subcmd eq 'autoexportgrades') || ($subcmd eq 'put')) {
                     splice(@rest,3,1,'Hidden');
                 }
                 $logged = join(':',('encrypt:'.$subcmd,@rest));
@@ -737,6 +799,9 @@ sub check_for_valid_session {
     if (ref($userhashref) eq 'HASH') {
         $userhashref->{'name'} = $disk_env{'user.name'};
         $userhashref->{'domain'} = $disk_env{'user.domain'};
+        if ($disk_env{'request.role'}) {
+            $userhashref->{'role'} = $disk_env{'request.role'};
+        }
         $userhashref->{'lti'} = $disk_env{'request.lti.login'};
         if ($userhashref->{'lti'}) {
             $userhashref->{'ltitarget'} = $disk_env{'request.lti.target'};
@@ -970,16 +1035,16 @@ sub userload {
 # ------------------------------ Find server with least workload from spare.tab
 
 sub spareserver {
-    my ($loadpercent,$userloadpercent,$want_server_name,$udom) = @_;
+    my ($r,$loadpercent,$userloadpercent,$want_server_name,$udom) = @_;
     my $spare_server;
     if ($userloadpercent !~ /\d/) { $userloadpercent=0; }
     my $lowest_load=($loadpercent > $userloadpercent) ? $loadpercent 
                                                      :  $userloadpercent;
     my ($uint_dom,$remotesessions);
     if (($udom ne '') && (&domain($udom) ne '')) {
-        my $uprimary_id = &Apache::lonnet::domain($udom,'primary');
-        $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);
-        my %udomdefaults = &Apache::lonnet::get_domain_defaults($udom);
+        my $uprimary_id = &domain($udom,'primary');
+        $uint_dom = &internet_dom($uprimary_id);
+        my %udomdefaults = &get_domain_defaults($udom);
         $remotesessions = $udomdefaults{'remotesessions'};
     }
     my $spareshash = &this_host_spares($udom);
@@ -1015,6 +1080,8 @@ sub spareserver {
                 if ($protocol{$spare_server} eq 'https') {
                     $protocol = $protocol{$spare_server};
                 }
+                my $alias = &use_proxy_alias($r,$spare_server);
+                $hostname = $alias if ($alias ne '');
 	        $spare_server = $protocol.'://'.$hostname;
             }
         }
@@ -1081,6 +1148,19 @@ sub find_existing_session {
     return;
 }
 
+sub delusersession {
+    my ($lonid,$udom,$uname) = @_;
+    my $uprimary_id = &domain($udom,'primary');
+    my $uintdom = &internet_dom($uprimary_id);
+    my $intdom = &internet_dom($lonid);
+    my $serverhomedom = &host_domain($lonid);
+    if (($uintdom ne '') && ($uintdom eq $intdom)) {
+        return &reply(join(':','delusersession',
+                            map {&escape($_)} ($udom,$uname)),$lonid);
+    }
+    return;
+}
+
 # check if user's browser sent load balancer cookie and server still has session
 # and is not overloaded.
 sub check_for_balancer_cookie {
@@ -1136,6 +1216,21 @@ sub check_for_balancer_cookie {
     return ($otherserver,$cookie);
 }
 
+sub updatebalcookie {
+    my ($cookie,$balancer,$lastentry)=@_;
+    if ($cookie =~ /^($match_domain)\_($match_username)\_[a-f0-9]{32}$/) {
+        my ($udom,$uname) = ($1,$2);
+        my $uprimary_id = &domain($udom,'primary');
+        my $uintdom = &internet_dom($uprimary_id);
+        my $intdom = &internet_dom($balancer);
+        my $serverhomedom = &host_domain($balancer);
+        if (($uintdom ne '') && ($uintdom eq $intdom)) {
+            return &reply('updatebalcookie:'.&escape($cookie).':'.&escape($lastentry),$balancer);
+        }
+    }
+    return;
+}
+
 sub delbalcookie {
     my ($cookie,$balancer) =@_;
     if ($cookie =~ /^($match_domain)\_($match_username)\_[a-f0-9]{32}$/) {
@@ -1145,7 +1240,7 @@ sub delbalcookie {
         my $intdom = &internet_dom($balancer);
         my $serverhomedom = &host_domain($balancer);
         if (($uintdom ne '') && ($uintdom eq $intdom)) {
-            return &reply("delbalcookie:$cookie",$balancer);
+            return &reply('delbalcookie:'.&escape($cookie),$balancer);
         }
     }
 }
@@ -1173,7 +1268,7 @@ sub choose_server {
         unless (defined($cached)) {
             my $cachetime = 60*60*24;
             my %domconfig =
-                &Apache::lonnet::get_dom('configuration',['loadbalancing'],$udom);
+                &get_dom('configuration',['loadbalancing'],$udom);
             if (ref($domconfig{'loadbalancing'}) eq 'HASH') {
                 $balancers = &do_cache_new('loadbalancing',$udom,$domconfig{'loadbalancing'},
                                            $cachetime);
@@ -1216,6 +1311,28 @@ sub choose_server {
     return ($login_host,$hostname,$portal_path,$isredirect,$lowest_load);
 }
 
+sub get_course_sessions {
+    my ($cnum,$cdom,$lastactivity) = @_;
+    my %servers = &internet_dom_servers($cdom);
+    my %returnhash;
+    foreach my $server (sort(keys(%servers))) {
+        my $rep = &reply("coursesessions:$cdom:$cnum:$lastactivity",$server);
+        my @pairs=split(/\&/,$rep);
+        unless (($rep eq 'unknown_cmd') || ($rep =~ /^error/)) {
+            foreach my $item (@pairs) {
+                my ($key,$value)=split(/=/,$item,2);
+                $key = &unescape($key);
+                next if ($key =~ /^error: 2 /);
+                if (exists($returnhash{$key})) {
+                    next if ($value < $returnhash{$key});
+                }
+                $returnhash{$key}=$value;
+            }
+        }
+    }
+    return %returnhash;
+}
+
 # --------------------------------------------- Try to change a user's password
 
 sub changepass {
@@ -1251,6 +1368,9 @@ sub changepass {
     } elsif ($answer =~ "invalid_client") {
         &logthis("$server refused to change $uname in $udom password because ".
                  "it was a reset by e-mail originating from an invalid server.");
+    } elsif ($answer =~ "^prioruse") {
+       &logthis("$server refused to change $uname in $udom password because ".
+                "the password had been used before");
     }
     return $answer;
 }
@@ -1260,7 +1380,7 @@ sub changepass {
 sub queryauthenticate {
     my ($uname,$udom)=@_;
     my $uhome=&homeserver($uname,$udom);
-    if (!$uhome) {
+    if ((!$uhome) || ($uhome eq 'no_host')) {
 	&logthis("User $uname at $udom is unknown when looking for authentication mechanism");
 	return 'no_host';
     }
@@ -1309,16 +1429,39 @@ sub authenticate {
     }
     if ($answer eq 'non_authorized') {
 	&logthis("User $uname at $udom rejected by $uhome");
-	return 'no_host'; 
+	return 'no_host';
     }
     &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
     return 'no_host';
 }
 
+sub can_switchserver {
+    my ($udom,$home) = @_;
+    my ($canswitch,@intdoms);
+    my $internet_names = &get_internet_names($home);
+    if (ref($internet_names) eq 'ARRAY') {
+        @intdoms = @{$internet_names};
+    }
+    my $uint_dom = &internet_dom(&domain($udom,'primary'));
+    if ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {
+        $canswitch = 1;
+    } else {
+         my $serverhomeID = &get_server_homeID(&hostname($home));
+         my $serverhomedom = &host_domain($serverhomeID);
+         my %defdomdefaults = &get_domain_defaults($serverhomedom);
+         my %udomdefaults = &get_domain_defaults($udom);
+         my $remoterev = &get_server_loncaparev('',$home);
+         $canswitch = &can_host_session($udom,$home,$remoterev,
+                                        $udomdefaults{'remotesessions'},
+                                        $defdomdefaults{'hostedsessions'});
+    }
+    return $canswitch;
+}
+
 sub can_host_session {
     my ($udom,$lonhost,$remoterev,$remotesessions,$hostedsessions) = @_;
     my $canhost = 1;
-    my $host_idn = &Apache::lonnet::internet_dom($lonhost);
+    my $host_idn = &internet_dom($lonhost);
     if (ref($remotesessions) eq 'HASH') {
         if (ref($remotesessions->{'excludedomain'}) eq 'ARRAY') {
             if (grep(/^\Q$host_idn\E$/,@{$remotesessions->{'excludedomain'}})) {
@@ -1354,8 +1497,8 @@ sub can_host_session {
     }
     if ($canhost) {
         if (ref($hostedsessions) eq 'HASH') {
-            my $uprimary_id = &Apache::lonnet::domain($udom,'primary');
-            my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);
+            my $uprimary_id = &domain($udom,'primary');
+            my $uint_dom = &internet_dom($uprimary_id);
             if (ref($hostedsessions->{'excludedomain'}) eq 'ARRAY') {
                 if (($uint_dom ne '') && 
                     (grep(/^\Q$uint_dom\E$/,@{$hostedsessions->{'excludedomain'}}))) {
@@ -1389,6 +1532,15 @@ sub spare_can_host {
             $canhost = 0;
         }
     }
+    if ($canhost) {
+        if (ref($defdomdefaults{'offloadoth'}) eq 'HASH') {
+            if ($defdomdefaults{'offloadoth'}{$try_server}) {
+                unless (&shared_institution($udom,$try_server)) {
+                    $canhost = 0;
+                }
+            }
+        }
+    }
     if (($canhost) && ($uint_dom)) {
         my @intdoms;
         my $internet_names = &get_internet_names($try_server);
@@ -1438,7 +1590,7 @@ sub spares_for_offload  {
     } else {
         my $cachetime = 60*60*24;
         my %domconfig =
-            &Apache::lonnet::get_dom('configuration',['usersessions'],$dom_in_use);
+            &get_dom('configuration',['usersessions'],$dom_in_use);
         if (ref($domconfig{'usersessions'}) eq 'HASH') {
             if (ref($domconfig{'usersessions'}{'spares'}) eq 'HASH') {
                 if (ref($domconfig{'usersessions'}{'spares'}{$lonhost_in_use}) eq 'HASH') {
@@ -1490,9 +1642,9 @@ sub check_loadbalancing {
         $rule_in_effect,$offloadto,$otherserver,$setcookie,$dom_balancers);
     my $lonhost = $perlvar{'lonHostID'};
     my @hosts = &current_machine_ids();
-    my $uprimary_id = &Apache::lonnet::domain($udom,'primary');
-    my $uintdom = &Apache::lonnet::internet_dom($uprimary_id);
-    my $intdom = &Apache::lonnet::internet_dom($lonhost);
+    my $uprimary_id = &domain($udom,'primary');
+    my $uintdom = &internet_dom($uprimary_id);
+    my $intdom = &internet_dom($lonhost);
     my $serverhomedom = &host_domain($lonhost);
     my $domneedscache;
     my $cachetime = 60*60*24;
@@ -1506,7 +1658,7 @@ sub check_loadbalancing {
     my ($result,$cached)=&is_cached_new('loadbalancing',$dom_in_use);
     unless (defined($cached)) {
         my %domconfig =
-            &Apache::lonnet::get_dom('configuration',['loadbalancing'],$dom_in_use);
+            &get_dom('configuration',['loadbalancing'],$dom_in_use);
         if (ref($domconfig{'loadbalancing'}) eq 'HASH') {
             $result = &do_cache_new('loadbalancing',$dom_in_use,$domconfig{'loadbalancing'},$cachetime);
         } else {
@@ -1567,7 +1719,7 @@ sub check_loadbalancing {
         ($result,$cached)=&is_cached_new('loadbalancing',$serverhomedom);
         unless (defined($cached)) {
             my %domconfig =
-                &Apache::lonnet::get_dom('configuration',['loadbalancing'],$serverhomedom);
+                &get_dom('configuration',['loadbalancing'],$serverhomedom);
             if (ref($domconfig{'loadbalancing'}) eq 'HASH') {
                 $result = &do_cache_new('loadbalancing',$serverhomedom,$domconfig{'loadbalancing'},$cachetime);
             } else {
@@ -1607,7 +1759,7 @@ sub check_loadbalancing {
     if ($domneedscache) {
         &do_cache_new('loadbalancing',$domneedscache,$is_balancer,$cachetime);
     }
-    if ($is_balancer) {
+    if (($is_balancer) && ($caller ne 'switchserver')) {
         my $lowest_load = 30000;
         if (ref($offloadto) eq 'HASH') {
             if (ref($offloadto->{'primary'}) eq 'ARRAY') {
@@ -1647,9 +1799,9 @@ sub check_loadbalancing {
                 }
             }
         }
-        unless ($homeintdom) {
-            undef($setcookie);
-        }
+    }
+    if (($is_balancer) && (!$homeintdom)) {
+        undef($setcookie);
     }
     return ($is_balancer,$otherserver,$setcookie,$offloadto,$dom_balancers);
 }
@@ -1700,7 +1852,7 @@ sub get_loadbalancer_targets {
             }
         } elsif ($rule_in_effect eq 'externalbalancer') {
             my %domconfig =
-                &Apache::lonnet::get_dom('configuration',['loadbalancing'],$udom);
+                &get_dom('configuration',['loadbalancing'],$udom);
             if (ref($domconfig{'loadbalancing'}) eq 'HASH') {
                 if ($domconfig{'loadbalancing'}{'lonhost'} ne '') {
                     if (&hostname($domconfig{'loadbalancing'}{'lonhost'}) ne '') {
@@ -1764,15 +1916,15 @@ sub trusted_domains {
         return ($trusted,$untrusted);
     }
     my $callprimary = &domain($calldom,'primary');
-    my $intcalldom = &Apache::lonnet::internet_dom($callprimary);
+    my $intcalldom = &internet_dom($callprimary);
     if ($intcalldom eq '') {
         return ($trusted,$untrusted);
     }
 
-    my ($trustconfig,$cached)=&Apache::lonnet::is_cached_new('trust',$calldom);
+    my ($trustconfig,$cached)=&is_cached_new('trust',$calldom);
     unless (defined($cached)) {
-        my %domconfig = &Apache::lonnet::get_dom('configuration',['trust'],$calldom);
-        &Apache::lonnet::do_cache_new('trust',$calldom,$domconfig{'trust'},3600);
+        my %domconfig = &get_dom('configuration',['trust'],$calldom);
+        &do_cache_new('trust',$calldom,$domconfig{'trust'},3600);
         $trustconfig = $domconfig{'trust'};
     }
     if (ref($trustconfig)) {
@@ -2075,7 +2227,7 @@ sub dump_dom {
 # ------------------------------------------ get items from domain db files   
 
 sub get_dom {
-    my ($namespace,$storearr,$udom,$uhome)=@_;
+    my ($namespace,$storearr,$udom,$uhome,$encrypt)=@_;
     return if ($udom eq 'public');
     my $items='';
     foreach my $item (@$storearr) {
@@ -2099,10 +2251,15 @@ sub get_dom {
     }
     if ($udom && $uhome && ($uhome ne 'no_host')) {
         my $rep;
-        if ($namespace =~ /^enc/) {
-            $rep=&reply("encrypt:egetdom:$udom:$namespace:$items",$uhome);
+        if (grep { $_ eq $uhome } &current_machine_ids()) {
+            # domain information is hosted on this machine
+            $rep = &LONCAPA::Lond::get_dom("getdom:$udom:$namespace:$items");
         } else {
-            $rep=&reply("getdom:$udom:$namespace:$items",$uhome);
+            if ($encrypt) {
+                $rep=&reply("encrypt:egetdom:$udom:$namespace:$items",$uhome);
+            } else {
+                $rep=&reply("getdom:$udom:$namespace:$items",$uhome);
+            }
         }
         my %returnhash;
         if ($rep eq '' || $rep =~ /^error: 2 /) {
@@ -2126,7 +2283,7 @@ sub get_dom {
 # -------------------------------------------- put items in domain db files 
 
 sub put_dom {
-    my ($namespace,$storehash,$udom,$uhome)=@_;
+    my ($namespace,$storehash,$udom,$uhome,$encrypt)=@_;
     if (!$udom) {
         $udom=$env{'user.domain'};
         if (defined(&domain($udom,'primary'))) {
@@ -2147,7 +2304,7 @@ sub put_dom {
             $items.=&escape($item).'='.&freeze_escape($$storehash{$item}).'&';
         }
         $items=~s/\&$//;
-        if ($namespace =~ /^enc/) {
+        if ($encrypt) {
             return &reply("encrypt:putdom:$udom:$namespace:$items",$uhome);
         } else {
             return &reply("putdom:$udom:$namespace:$items",$uhome);
@@ -2185,6 +2342,57 @@ sub del_dom {
     }
 }
 
+sub store_dom {
+    my ($storehash,$id,$namespace,$dom,$home,$encrypt) = @_;
+    $$storehash{'ip'}=&get_requestor_ip();
+    $$storehash{'host'}=$perlvar{'lonHostID'};
+    my $namevalue='';
+    foreach my $key (keys(%{$storehash})) {
+        $namevalue.=&escape($key).'='.&freeze_escape($$storehash{$key}).'&';
+    }
+    $namevalue=~s/\&$//;
+    if (grep { $_ eq $home } current_machine_ids()) {
+        return LONCAPA::Lond::store_dom("storedom:$dom:$namespace:$id:$namevalue");
+    } else {
+        if ($namespace eq 'private') {
+            return 'refused';
+        } elsif ($encrypt) {
+            return reply("encrypt:storedom:$dom:$namespace:$id:$namevalue",$home);
+        } else {
+            return reply("storedom:$dom:$namespace:$id:$namevalue",$home);
+        }
+    }
+}
+
+sub restore_dom {
+    my ($id,$namespace,$dom,$home,$encrypt) = @_;
+    my $answer;
+    if (grep { $_ eq $home } current_machine_ids()) {
+        $answer = LONCAPA::Lond::restore_dom("restoredom:$dom:$namespace:$id");
+    } elsif ($namespace ne 'private') {
+        if ($encrypt) {
+            $answer=&reply("encrypt:restoredom:$dom:$namespace:$id",$home);
+        } else {
+            $answer=&reply("restoredom:$dom:$namespace:$id",$home);
+        }
+    }
+    my %returnhash=();
+    unless (($answer eq '') || ($answer eq 'con_lost') || ($answer eq 'refused') || 
+            ($answer eq 'unknown_cmd') || ($answer eq 'rejected')) {
+        foreach my $line (split(/\&/,$answer)) {
+            my ($name,$value)=split(/\=/,$line);
+            $returnhash{&unescape($name)}=&thaw_unescape($value);
+        }
+        my $version;
+        for ($version=1;$version<=$returnhash{'version'};$version++) {
+            foreach my $item (split(/\:/,$returnhash{$version.':keys'})) {
+                $returnhash{$item}=$returnhash{$version.':'.$item};
+            }
+        }
+    }
+    return %returnhash;
+}
+
 # ----------------------------------construct domainconfig user for a domain 
 sub get_domainconfiguser {
     my ($udom) = @_;
@@ -2194,7 +2402,7 @@ sub get_domainconfiguser {
 sub retrieve_inst_usertypes {
     my ($udom) = @_;
     my (%returnhash,@order);
-    my %domdefs = &Apache::lonnet::get_domain_defaults($udom);
+    my %domdefs = &get_domain_defaults($udom);
     if ((ref($domdefs{'inststatustypes'}) eq 'HASH') && 
         (ref($domdefs{'inststatusorder'}) eq 'ARRAY')) {
         return ($domdefs{'inststatustypes'},$domdefs{'inststatusorder'});
@@ -2227,7 +2435,7 @@ sub retrieve_inst_usertypes {
 
 sub is_domainimage {
     my ($url) = @_;
-    if ($url=~m-^/+res/+($match_domain)/+\1\-domainconfig/+(img|logo|domlogo)/+[^/]-) {
+    if ($url=~m-^/+res/+($match_domain)/+\1\-domainconfig/+(img|logo|domlogo|login)/+[^/]-) {
         if (&domain($1) ne '') {
             return '1';
         }
@@ -2244,7 +2452,7 @@ sub inst_directory_query {
     if ($homeserver ne '') {
         unless ($homeserver eq $perlvar{'lonHostID'}) {
             if ($srch->{'srchby'} eq 'email') {
-                my $lcrev = &get_server_loncaparev(undef,$homeserver);
+                my $lcrev = &get_server_loncaparev($udom,$homeserver);
                 my ($major,$minor) = ($lcrev =~ /^\'?(\d+)\.(\d+)\.[\w.\-]+\'?$/);
                 if (($major eq '' && $minor eq '') || ($major < 2) ||
                     (($major == 2) && ($minor < 12))) {
@@ -2295,7 +2503,7 @@ sub usersearch {
         if (&host_domain($tryserver) eq $dom) {
             unless ($tryserver eq $perlvar{'lonHostID'}) {
                 if ($srch->{'srchby'} eq 'email') {
-                    my $lcrev = &get_server_loncaparev(undef,$tryserver);
+                    my $lcrev = &get_server_loncaparev($dom,$tryserver);
                     my ($major,$minor) = ($lcrev =~ /^\'?(\d+)\.(\d+)\.[\w.\-]+\'?$/);
                     next if (($major eq '' && $minor eq '') || ($major < 2) ||
                              (($major == 2) && ($minor < 12)));
@@ -2465,6 +2673,10 @@ sub inst_rulecheck {
                     $response=&unescape(&reply('instselfcreatecheck:'.
                                                &escape($udom).':'.&escape($uname).
                                               ':'.$rulestr,$homeserver));
+                } elsif ($item eq 'unamemap') {
+                    $response=&unescape(&reply('instunamemapcheck:'.
+                                               &escape($udom).':'.&escape($uname).
+                                              ':'.$rulestr,$homeserver));
                 }
                 if ($response ne 'refused') {
                     my @pairs=split(/\&/,$response);
@@ -2494,6 +2706,9 @@ sub inst_userrules {
             } elsif ($check eq 'email') {
                 $response=&reply('instemailrules:'.&escape($udom),
                                  $homeserver);
+            } elsif ($check eq 'unamemap') {
+                $response=&reply('unamemaprules:'.&escape($udom),
+                                 $homeserver); 
             } else {
                 $response=&reply('instuserrules:'.&escape($udom),
                                  $homeserver);
@@ -2535,12 +2750,14 @@ sub get_domain_defaults {
     }
     my %domdefaults;
     my %domconfig =
-         &Apache::lonnet::get_dom('configuration',['defaults','quotas',
+         &get_dom('configuration',['defaults','quotas',
                                   'requestcourses','inststatus',
                                   'coursedefaults','usersessions',
                                   'requestauthor','selfenrollment',
                                   'coursecategories','ssl','autoenroll',
-                                  'trust','helpsettings'],$domain);
+                                  'trust','helpsettings','wafproxy',
+                                  'ltisec','toolsec','domexttool',
+                                  'exttool','privacy'],$domain);
     my @coursetypes = ('official','unofficial','community','textbook','placement');
     if (ref($domconfig{'defaults'}) eq 'HASH') {
         $domdefaults{'lang_def'} = $domconfig{'defaults'}{'lang_def'}; 
@@ -2549,9 +2766,12 @@ sub get_domain_defaults {
         $domdefaults{'timezone_def'} = $domconfig{'defaults'}{'timezone_def'};
         $domdefaults{'datelocale_def'} = $domconfig{'defaults'}{'datelocale_def'};
         $domdefaults{'portal_def'} = $domconfig{'defaults'}{'portal_def'};
+        $domdefaults{'portal_def_email'} = $domconfig{'defaults'}{'portal_def_email'};
+        $domdefaults{'portal_def_web'} = $domconfig{'defaults'}{'portal_def_web'};
         $domdefaults{'intauth_cost'} = $domconfig{'defaults'}{'intauth_cost'};
         $domdefaults{'intauth_switch'} = $domconfig{'defaults'}{'intauth_switch'};
         $domdefaults{'intauth_check'} = $domconfig{'defaults'}{'intauth_check'};
+        $domdefaults{'unamemap_rule'} = $domconfig{'defaults'}{'unamemap_rule'};
     } else {
         $domdefaults{'lang_def'} = &domain($domain,'lang_def');
         $domdefaults{'auth_def'} = &domain($domain,'auth_def');
@@ -2589,6 +2809,7 @@ sub get_domain_defaults {
     if (ref($domconfig{'coursedefaults'}) eq 'HASH') {
         $domdefaults{'canuse_pdfforms'} = $domconfig{'coursedefaults'}{'canuse_pdfforms'};
         $domdefaults{'usejsme'} = $domconfig{'coursedefaults'}{'usejsme'};
+        $domdefaults{'inline_chem'} = $domconfig{'coursedefaults'}{'inline_chem'};
         $domdefaults{'uselcmath'} = $domconfig{'coursedefaults'}{'uselcmath'};
         if (ref($domconfig{'coursedefaults'}{'postsubmit'}) eq 'HASH') {
             $domdefaults{'postsubmit'} = $domconfig{'coursedefaults'}{'postsubmit'}{'client'};
@@ -2602,12 +2823,25 @@ sub get_domain_defaults {
             if (ref($domconfig{'coursedefaults'}{'uploadquota'}) eq 'HASH') {
                 $domdefaults{$type.'quota'} = $domconfig{'coursedefaults'}{'uploadquota'}{$type};
             }
+            if (ref($domconfig{'coursedefaults'}{'coursequota'}) eq 'HASH') {
+                $domdefaults{$type.'coursequota'} = $domconfig{'coursedefaults'}{'coursequota'}{$type};
+            }
             if ($domdefaults{'postsubmit'} eq 'on') {
                 if (ref($domconfig{'coursedefaults'}{'postsubmit'}{'timeout'}) eq 'HASH') {
                     $domdefaults{$type.'postsubtimeout'} = 
                         $domconfig{'coursedefaults'}{'postsubmit'}{'timeout'}{$type}; 
                 }
             }
+            if (ref($domconfig{'coursedefaults'}{'domexttool'}) eq 'HASH') {
+                $domdefaults{$type.'domexttool'} = $domconfig{'coursedefaults'}{'domexttool'}{$type};
+            } else {
+                $domdefaults{$type.'domexttool'} = 1;
+            }
+            if (ref($domconfig{'coursedefaults'}{'exttool'}) eq 'HASH') {
+                $domdefaults{$type.'exttool'} = $domconfig{'coursedefaults'}{'exttool'}{$type};
+            } else {
+                $domdefaults{$type.'exttool'} = 0;
+            }
         }
         if (ref($domconfig{'coursedefaults'}{'canclone'}) eq 'HASH') {
             if (ref($domconfig{'coursedefaults'}{'canclone'}{'instcode'}) eq 'ARRAY') {
@@ -2621,7 +2855,10 @@ sub get_domain_defaults {
         }
         if ($domconfig{'coursedefaults'}{'texengine'}) {
             $domdefaults{'texengine'} = $domconfig{'coursedefaults'}{'texengine'};
-        } 
+        }
+        if (exists($domconfig{'coursedefaults'}{'ltiauth'})) {
+            $domdefaults{'crsltiauth'} = $domconfig{'coursedefaults'}{'ltiauth'};
+        }
     }
     if (ref($domconfig{'usersessions'}) eq 'HASH') {
         if (ref($domconfig{'usersessions'}{'remote'}) eq 'HASH') {
@@ -2633,6 +2870,9 @@ sub get_domain_defaults {
         if (ref($domconfig{'usersessions'}{'offloadnow'}) eq 'HASH') {
             $domdefaults{'offloadnow'} = $domconfig{'usersessions'}{'offloadnow'};
         }
+        if (ref($domconfig{'usersessions'}{'offloadoth'}) eq 'HASH') {
+            $domdefaults{'offloadoth'} = $domconfig{'usersessions'}{'offloadoth'};
+        }
     }
     if (ref($domconfig{'selfenrollment'}) eq 'HASH') {
         if (ref($domconfig{'selfenrollment'}{'admin'}) eq 'HASH') {
@@ -2665,7 +2905,7 @@ sub get_domain_defaults {
     if (ref($domconfig{'coursecategories'}) eq 'HASH') {
         $domdefaults{'catauth'} = 'std';
         $domdefaults{'catunauth'} = 'std';
-        if ($domconfig{'coursecategories'}{'auth'}) { 
+        if ($domconfig{'coursecategories'}{'auth'}) {
             $domdefaults{'catauth'} = $domconfig{'coursecategories'}{'auth'};
         }
         if ($domconfig{'coursecategories'}{'unauth'}) {
@@ -2693,6 +2933,7 @@ sub get_domain_defaults {
     }
     if (ref($domconfig{'autoenroll'}) eq 'HASH') {
         $domdefaults{'autofailsafe'} = $domconfig{'autoenroll'}{'autofailsafe'};
+        $domdefaults{'failsafe'} = $domconfig{'autoenroll'}{'failsafe'};
     }
     if (ref($domconfig{'helpsettings'}) eq 'HASH') {
         $domdefaults{'submitbugs'} = $domconfig{'helpsettings'}{'submitbugs'};
@@ -2700,12 +2941,117 @@ sub get_domain_defaults {
             $domdefaults{'adhocroles'} = $domconfig{'helpsettings'}{'adhoc'};
         }
     }
+    if (ref($domconfig{'wafproxy'}) eq 'HASH') {
+        foreach my $item ('ipheader','trusted','vpnint','vpnext','sslopt') {
+            if ($domconfig{'wafproxy'}{$item}) {
+                $domdefaults{'waf_'.$item} = $domconfig{'wafproxy'}{$item};
+            }
+        }
+    }
+    if (ref($domconfig{'ltisec'}) eq 'HASH') {
+        if (ref($domconfig{'ltisec'}{'encrypt'}) eq 'HASH') {
+            $domdefaults{'linkprotenc_crs'} = $domconfig{'ltisec'}{'encrypt'}{'crs'};
+            $domdefaults{'linkprotenc_dom'} = $domconfig{'ltisec'}{'encrypt'}{'dom'};
+            $domdefaults{'ltienc_consumers'} = $domconfig{'ltisec'}{'encrypt'}{'consumers'};
+        }
+        if (ref($domconfig{'ltisec'}{'private'}) eq 'HASH') {
+            if (ref($domconfig{'ltisec'}{'private'}{'keys'}) eq 'ARRAY') {
+                $domdefaults{'ltiprivhosts'} = $domconfig{'ltisec'}{'private'}{'keys'};
+            }
+        }
+    }
+    if (ref($domconfig{'toolsec'}) eq 'HASH') {
+        if (ref($domconfig{'toolsec'}{'encrypt'}) eq 'HASH') {
+            $domdefaults{'toolenc_crs'} = $domconfig{'toolsec'}{'encrypt'}{'crs'};
+            $domdefaults{'toolenc_dom'} = $domconfig{'toolsec'}{'encrypt'}{'dom'};
+        }
+        if (ref($domconfig{'toolsec'}{'private'}) eq 'HASH') {
+            if (ref($domconfig{'toolsec'}{'private'}{'keys'}) eq 'ARRAY') {
+                $domdefaults{'toolprivhosts'} = $domconfig{'toolsec'}{'private'}{'keys'};
+            }
+        }
+    }
+    if (ref($domconfig{'privacy'}) eq 'HASH') {
+        if (ref($domconfig{'privacy'}{'approval'}) eq 'HASH') {
+            foreach my $domtype ('instdom','extdom') {
+                if (ref($domconfig{'privacy'}{'approval'}{$domtype}) eq 'HASH') {
+                    foreach my $roletype ('domain','author','course','community') {
+                        if ($domconfig{'privacy'}{'approval'}{$domtype}{$roletype} eq 'user') {
+                            $domdefaults{'userapprovals'} = 1;
+                            last;
+                        }
+                    }
+                }
+                last if ($domdefaults{'userapprovals'});
+            }
+        }
+    }
     &do_cache_new('domdefaults',$domain,\%domdefaults,$cachetime);
     return %domdefaults;
 }
 
+sub get_dom_cats {
+    my ($dom) = @_;
+    return unless (&domain($dom));
+    my ($cats,$cached)=&is_cached_new('cats',$dom);
+    unless (defined($cached)) {
+        my %domconfig = &get_dom('configuration',['coursecategories'],$dom);
+        if (ref($domconfig{'coursecategories'}) eq 'HASH') {
+            if (ref($domconfig{'coursecategories'}{'cats'}) eq 'HASH') {
+                %{$cats} = %{$domconfig{'coursecategories'}{'cats'}};
+            } else {
+                $cats = {};
+            }
+        } else {
+            $cats = {};
+        }
+        &do_cache_new('cats',$dom,$cats,3600);
+    }
+    return $cats;
+}
+
+sub get_dom_instcats {
+    my ($dom) = @_;
+    return unless (&domain($dom));
+    my ($instcats,$cached)=&is_cached_new('instcats',$dom);
+    unless (defined($cached)) {
+        my (%coursecodes,%codes,@codetitles,%cat_titles,%cat_order);
+        my $totcodes = &retrieve_instcodes(\%coursecodes,$dom);
+        if ($totcodes > 0) {
+            my $caller = 'global';
+            if (&auto_instcode_format($caller,$dom,\%coursecodes,\%codes,
+                                      \@codetitles,\%cat_titles,\%cat_order) eq 'ok') {
+                $instcats = {
+                                totcodes => $totcodes,
+                                codes => \%codes,
+                                codetitles => \@codetitles,
+                                cat_titles => \%cat_titles,
+                                cat_order => \%cat_order,
+                            };
+                &do_cache_new('instcats',$dom,$instcats,3600);
+            }
+        }
+    }
+    return $instcats;
+}
+
+sub retrieve_instcodes {
+    my ($coursecodes,$dom) = @_;
+    my $totcodes;
+    my %courses = &courseiddump($dom,'.',1,'.','.','.',undef,undef,'Course');
+    foreach my $course (keys(%courses)) {
+        if (ref($courses{$course}) eq 'HASH') {
+            if ($courses{$course}{'inst_code'} ne '') {
+                $$coursecodes{$course} = $courses{$course}{'inst_code'};
+                $totcodes ++;
+            }
+        }
+    }
+    return $totcodes;
+}
+
 sub course_portal_url {
-    my ($cnum,$cdom) = @_;
+    my ($cnum,$cdom,$r) = @_;
     my $chome = &homeserver($cnum,$cdom);
     my $hostname = &hostname($chome);
     my $protocol = $protocol{$chome};
@@ -2715,11 +3061,56 @@ sub course_portal_url {
     if ($domdefaults{'portal_def'}) {
         $firsturl = $domdefaults{'portal_def'};
     } else {
+        my $alias = &use_proxy_alias($r,$chome);
+        $hostname = $alias if ($alias ne '');
         $firsturl = $protocol.'://'.$hostname;
     }
     return $firsturl;
 }
 
+sub url_prefix {
+    my ($r,$dom,$home,$context) = @_;
+    my $prefix;
+    my %domdefs = &get_domain_defaults($dom);
+    if ($domdefs{'portal_def'} && $domdefs{'portal_def_'.$context}) {
+        if ($domdefs{'portal_def'} =~ m{^(https?://[^/]+)}) {
+            $prefix = $1;
+        }
+    }
+    if ($prefix eq '') {
+        my $hostname = &hostname($home);
+        my $protocol = $protocol{$home};
+        $protocol = 'http' if ($protocol{$home} ne 'https');
+        my $alias = &use_proxy_alias($r,$home);
+        $hostname = $alias if ($alias ne '');
+        $prefix = $protocol.'://'.$hostname;
+    }
+    return $prefix;
+}
+
+# --------------------------------------------- Get domain config for passwords
+
+sub get_passwdconf {
+    my ($dom) = @_;
+    my (%passwdconf,$gotconf,$lookup);
+    my ($result,$cached)=&is_cached_new('passwdconf',$dom);
+    if (defined($cached)) {
+        if (ref($result) eq 'HASH') {
+            %passwdconf = %{$result};
+            $gotconf = 1;
+        }
+    }
+    unless ($gotconf) {
+        my %domconfig = &get_dom('configuration',['passwords'],$dom);
+        if (ref($domconfig{'passwords'}) eq 'HASH') {
+            %passwdconf = %{$domconfig{'passwords'}};
+        }
+        my $cachetime = 24*60*60;
+        &do_cache_new('passwdconf',$dom,\%passwdconf,$cachetime);
+    }
+    return %passwdconf;
+}
+
 # --------------------------------------------------- Assign a key to a student
 
 sub assign_access_key {
@@ -2868,7 +3259,7 @@ sub courseid_to_courseurl {
 	return "/$cdom/$cnum";
     }
 
-    my %courseinfo=&Apache::lonnet::coursedescription($courseid);
+    my %courseinfo=&coursedescription($courseid);
     if (exists($courseinfo{'num'})) {
 	return "/$courseinfo{'domain'}/$courseinfo{'num'}";
     }
@@ -3066,14 +3457,14 @@ sub userenvironment {
 # ---------------------------------------------------------- Get a studentphoto
 sub studentphoto {
     my ($udom,$unam,$ext) = @_;
-    my $home=&Apache::lonnet::homeserver($unam,$udom);
+    my $home=&homeserver($unam,$udom);
     if (defined($env{'request.course.id'})) {
         if ($env{'course.'.$env{'request.course.id'}.'.internal.showphoto'}) {
             if ($udom eq $env{'course.'.$env{'request.course.id'}.'.domain'}) {
                 return(&retrievestudentphoto($udom,$unam,$ext)); 
             } else {
                 my ($result,$perm_reqd)=
-		    &Apache::lonnet::auto_photo_permission($unam,$udom);
+		    &auto_photo_permission($unam,$udom);
                 if ($result eq 'ok') {
                     if (!($perm_reqd eq 'yes')) {
                         return(&retrievestudentphoto($udom,$unam,$ext));
@@ -3083,7 +3474,7 @@ sub studentphoto {
         }
     } else {
         my ($result,$perm_reqd) = 
-	    &Apache::lonnet::auto_photo_permission($unam,$udom);
+	    &auto_photo_permission($unam,$udom);
         if ($result eq 'ok') {
             if (!($perm_reqd eq 'yes')) {
                 return(&retrievestudentphoto($udom,$unam,$ext));
@@ -3095,14 +3486,14 @@ sub studentphoto {
 
 sub retrievestudentphoto {
     my ($udom,$unam,$ext,$type) = @_;
-    my $home=&Apache::lonnet::homeserver($unam,$udom);
-    my $ret=&Apache::lonnet::reply("studentphoto:$udom:$unam:$ext:$type",$home);
+    my $home=&homeserver($unam,$udom);
+    my $ret=&reply("studentphoto:$udom:$unam:$ext:$type",$home);
     if ($ret eq 'ok') {
         my $url="/uploaded/$udom/$unam/internal/studentphoto.$ext";
         if ($type eq 'thumbnail') {
             $url="/uploaded/$udom/$unam/internal/studentphoto_tn.$ext"; 
         }
-        my $tokenurl=&Apache::lonnet::tokenwrapper($url);
+        my $tokenurl=&tokenwrapper($url);
         return $tokenurl;
     } else {
         if ($type eq 'thumbnail') {
@@ -3262,6 +3653,32 @@ sub repcopy {
     }
 }
 
+# ------------------------------------------------- Unsubscribe from a resource
+
+sub unsubscribe {
+    my ($fname) = @_;
+    my $answer;
+    if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return $answer; }
+    $fname=~s/[\n\r]//g;
+    my $author=$fname;
+    $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
+    my ($udom,$uname)=split(/\//,$author);
+    my $home=homeserver($uname,$udom);
+    if ($home eq 'no_host') {
+        $answer = 'no_host';
+    } elsif (grep { $_ eq $home } &current_machine_ids()) {
+        $answer = 'home';
+    } else {
+        my $defdom = $perlvar{'lonDefDomain'};
+        if (&will_trust('content',$defdom,$udom)) {
+            $answer = reply("unsub:$fname",$home);
+        } else {
+            $answer = 'untrusted';
+        }
+    }
+    return $answer;
+}
+
 # ------------------------------------------------ Get server side include body
 sub ssi_body {
     my ($filelink,%form)=@_;
@@ -3290,11 +3707,29 @@ sub ssi_body {
 # --------------------------------------------------------- Server Side Include
 
 sub absolute_url {
-    my ($host_name) = @_;
+    my ($host_name,$unalias,$keep_proto) = @_;
     my $protocol = ($ENV{'SERVER_PORT'} == 443?'https://':'http://');
     if ($host_name eq '') {
 	$host_name = $ENV{'SERVER_NAME'};
     }
+    if ($unalias) {
+        my $alias = &get_proxy_alias();
+        if ($alias eq $host_name) {
+            my $lonhost = $perlvar{'lonHostID'};
+            my $hostname = &hostname($lonhost);
+            my $lcproto; 
+            if (($keep_proto) || ($hostname eq '')) {
+                $lcproto = $protocol;
+            } else {
+                $lcproto = $protocol{$lonhost};
+                $lcproto = 'http' if ($lcproto ne 'https');
+                $lcproto .= '://';
+            }
+            unless ($hostname eq '') {
+                return $lcproto.$hostname;
+            }
+        }
+    }
     return $protocol.$host_name;
 }
 
@@ -3311,12 +3746,13 @@ sub absolute_url {
 sub ssi {
 
     my ($fn,%form)=@_;
-    my $request;
+    my ($host,$request,$response);
+    $host = &absolute_url('',1);
 
     $form{'no_update_last_known'}=1;
     &Apache::lonenc::check_encrypt(\$fn);
     if (%form) {
-      $request=new HTTP::Request('POST',&absolute_url().$fn);
+      $request=new HTTP::Request('POST',$host.$fn);
       $request->content(join('&',map { 
             my $name = escape($_);
             "$name=" . ( ref($form{$_}) eq 'ARRAY' 
@@ -3324,7 +3760,7 @@ sub ssi {
             : &escape($form{$_}) );    
         } keys(%form)));
     } else {
-      $request=new HTTP::Request('GET',&absolute_url().$fn);
+      $request=new HTTP::Request('GET',$host.$fn);
     }
 
     $request->header(Cookie => $ENV{'HTTP_COOKIE'});
@@ -3334,12 +3770,12 @@ sub ssi {
         ($form{'grade_courseid'} eq $env{'request.course.id'}) &&
         ($form{'grade_username'} ne '') && ($form{'grade_domain'} ne '') &&
         ($form{'grade_symb'} ne '') &&
-        (&Apache::lonnet::allowed('mgr',$env{'request.course.id'}.
-                                 ($env{'request.course.sec'}?'/'.$env{'request.course.sec'}:'')))) {
+        (&allowed('mgr',$env{'request.course.id'}.
+                        ($env{'request.course.sec'}?'/'.$env{'request.course.sec'}:'')))) {
         $islocal = 1;
     }
-    my $response= &LONCAPA::LWPReq::makerequest($lonhost,$request,'',\%perlvar,
-                                                '','','',$islocal);
+    $response= &LONCAPA::LWPReq::makerequest($lonhost,$request,'',\%perlvar,
+                                             '','','',$islocal);
 
     if (wantarray) {
 	return ($response->content, $response);
@@ -3407,12 +3843,18 @@ sub remove_stale_resfile {
                                     $stale = 1;
                                 }
                                 if ($stale) {
-                                    unlink($fname);
-                                    if ($uri!~/\.meta$/) {
-                                        unlink($fname.'.meta');
+                                    if (unlink($fname)) {
+                                        if ($uri!~/\.meta$/) {
+                                            if (-e $fname.'.meta') {
+                                                unlink($fname.'.meta');
+                                            }
+                                        }
+                                        my $unsubresult = &unsubscribe($fname);
+                                        unless ($unsubresult eq 'ok') {
+                                            &logthis("no unsub of $fname from $homeserver, reason: $unsubresult");
+                                        }
+                                        $removed = 1;
                                     }
-                                    &reply("unsub:$fname",$homeserver);
-                                    $removed = 1;
                                 }
                             }
                         }
@@ -3480,7 +3922,7 @@ sub can_edit_resource {
     }
 
     if ($env{'request.course.id'}) {
-        my $crsedit = &Apache::lonnet::allowed('mdc',$env{'request.course.id'});
+        my $crsedit = &allowed('mdc',$env{'request.course.id'});
         if ($group ne '') {
 # if this is a group homepage or group bulletin board, check group privs
             my $allowed = 0;
@@ -3509,14 +3951,19 @@ sub can_edit_resource {
             }
         } else {
             if ($resurl =~ m{^/?adm/viewclasslist$}) {
-                unless (&Apache::lonnet::allowed('opa',$env{'request.course.id'})) {
+                unless (&allowed('opa',$env{'request.course.id'})) {
                     return;
                 }
             } elsif (!$crsedit) {
+                if ($env{'request.role'} =~ m{^st\./$cdom/$cnum}) {
 #
 # No edit allowed where CC has switched to student role.
 #
-                return;
+                    return;
+                } elsif (($resurl !~ m{^/res/$match_domain/$match_username/}) ||
+                         ($resurl =~ m{^/res/lib/templates/})) {
+                    return;
+                }
             }
         }
     }
@@ -3542,7 +3989,7 @@ sub can_edit_resource {
                     $forceedit = 1;
                 }
                 $cfile = $resurl;
-            } elsif (($resurl ne '') && (&is_on_map($resurl))) { 
+            } elsif (($resurl ne '') && (&is_on_map($resurl))) {
                 if ($resurl =~ m{^/adm/$match_domain/$match_username/\d+/smppg|bulletinboard$}) {
                     $incourse = 1;
                     if ($env{'form.forceedit'}) {
@@ -3562,6 +4009,18 @@ sub can_edit_resource {
                         $forceedit = 1;
                     }
                     $cfile = $resurl;
+                } elsif (($resurl =~ m{^/ext/}) && ($symb ne '')) {
+                    my ($map,$id,$res) = &decode_symb($symb);
+                    if ($map =~ /\.page$/) {
+                        $incourse = 1;
+                        if ($env{'form.forceedit'}) {
+                            $forceview = 1;
+                            $cfile = $map;
+                        } else {
+                            $forceedit = 1;
+                            $cfile =  '/adm/wrapper'.$resurl;
+                        }
+                    }
                 } elsif ($resurl =~ m{^/adm/wrapper/adm/$cdom/$cnum/\d+/ext\.tool$}) {
                     $incourse = 1;
                     if ($env{'form.forceedit'}) {
@@ -3587,13 +4046,13 @@ sub can_edit_resource {
                     $cfile = $template;
                 }
             } elsif (($resurl =~ m{^/adm/wrapper/ext/}) && ($env{'form.folderpath'} =~ /^supplemental/)) {
-                    $incourse = 1;
-                    if ($env{'form.forceedit'}) {
-                        $forceview = 1;
-                    } else {
-                        $forceedit = 1;
-                    }
-                    $cfile = $resurl;
+                $incourse = 1;
+                if ($env{'form.forceedit'}) {
+                    $forceview = 1;
+                } else {
+                    $forceedit = 1;
+                }
+                $cfile = $resurl;
             } elsif (($resurl =~ m{^/adm/wrapper/adm/$cdom/$cnum/\d+/ext\.tool$}) && ($env{'form.folderpath'} =~ /^supplemental/)) {
                 $incourse = 1;
                 if ($env{'form.forceedit'}) {
@@ -3856,13 +4315,21 @@ sub clean_filename {
     }
 # Replace spaces by underscores
     $fname=~s/\s+/\_/g;
+# Transliterate non-ascii text to ascii
+    my $lang = &Apache::lonlocal::current_language();
+    $fname = &LONCAPA::transliterate::fname_to_ascii($fname,$lang);
 # Replace all other weird characters by nothing
     $fname=~s{[^/\w\.\-]}{}g;
 # Replace all .\d. sequences with _\d. so they no longer look like version
 # numbers
     $fname=~s/\.(\d+)(?=\.)/_$1/g;
+# Replace three or more adjacent underscores with one for consistency 
+# with loncfile::filename_check() so complete url can be extracted by
+# lonnet::decode_symb()
+    $fname=~s/_{3,}/_/g;
     return $fname;
 }
+
 # This Function checks if an Image's dimensions exceed either $resizewidth (width) 
 # or $resizeheight (height) - both pixels. If so, the image is scaled to produce an 
 # image with the same aspect ratio as the original, but with dimensions which do 
@@ -3905,7 +4372,7 @@ sub resizeImage {
 # input: $formname - the contents of the file are in $env{"form.$formname"}
 #                    the desired filename is in $env{"form.$formname.filename"}
 #        $context - possible values: coursedoc, existingfile, overwrite, 
-#                                    canceloverwrite, scantron or ''.
+#                                    canceloverwrite, scantron, toollogo  or ''.
 #                   if 'coursedoc': upload to the current course
 #                   if 'existingfile': write file to tmp/overwrites directory 
 #                   if 'canceloverwrite': delete file written to tmp/overwrites directory
@@ -3917,8 +4384,8 @@ sub resizeImage {
 #                          Section => 4, CODE => 5, FirstQuestion => 9 }).
 #        $allfiles - reference to hash for embedded objects
 #        $codebase - reference to hash for codebase of java objects
-#        $desuname - username for permanent storage of uploaded file
-#        $dsetudom - domain for permanaent storage of uploaded file
+#        $destuname - username for permanent storage of uploaded file
+#        $destudom - domain for permanaent storage of uploaded file
 #        $thumbwidth - width (pixels) of thumbnail to make for uploaded image 
 #        $thumbheight - height (pixels) of thumbnail to make for uploaded image
 #        $resizewidth - width (pixels) to which to resize uploaded image
@@ -3937,6 +4404,14 @@ sub userfileupload {
     $fname=&clean_filename($fname);
     # See if there is anything left
     unless ($fname) { return 'error: no uploaded file'; }
+    # If filename now begins with a . prepend unix timestamp _ milliseconds
+    if ($fname =~ /^\./) {
+        my ($s,$usec) = &gettimeofday();
+        while (length($usec) < 6) {
+            $usec = '0'.$usec;
+        }
+        $fname = $s.'_'.substr($usec,0,3).$fname;
+    }
     # Files uploaded to help request form, or uploaded to "create course" page are handled differently
     if ((($formname eq 'screenshot') && ($subdir eq 'helprequests')) ||
         (($formname eq 'coursecreatorxml') && ($subdir eq 'batchupload')) ||
@@ -4120,11 +4595,24 @@ sub finishuserfileupload {
     if (($thumbwidth =~ /^\d+$/) && ($thumbheight =~ /^\d+$/)) {
         my $input = $filepath.'/'.$file;
         my $output = $filepath.'/'.'tn-'.$file;
+        my $makethumb; 
         my $thumbsize = $thumbwidth.'x'.$thumbheight;
-        my @args = ('convert','-sample',$thumbsize,$input,$output);
-        system({$args[0]} @args);
-        if (-e $filepath.'/'.'tn-'.$file) {
-            $fetchthumb  = 1; 
+        if ($context eq 'toollogo') {
+            my ($fullwidth,$fullheight) = &check_dimensions($input);
+            if ($fullwidth ne '' && $fullheight ne '') {
+                if ($fullwidth > $thumbwidth && $fullheight > $thumbheight) {
+                    $makethumb = 1;
+                }
+            }
+        } else {
+            $makethumb = 1;
+        }
+        if ($makethumb) {
+            my @args = ('convert','-sample',$thumbsize,$input,$output);
+            system({$args[0]} @args);
+            if (-e $filepath.'/'.'tn-'.$file) {
+                $fetchthumb  = 1; 
+            }
         }
     }
  
@@ -4356,12 +4844,42 @@ sub embedded_dependency {
     return;
 }
 
+sub check_dimensions {
+    my ($inputfile) = @_;
+    my ($fullwidth,$fullheight);
+    if (($inputfile =~ m|^[/\w.\-]+$|) && (-e $inputfile)) {
+        my $mm = new File::MMagic;
+        my $mime_type = $mm->checktype_filename($inputfile);
+        if ($mime_type =~ m{^image/}) {
+            if (open(PIPE,"identify $inputfile 2>&1 |")) {
+                my $imageinfo = <PIPE>;
+                if (!close(PIPE)) {
+                    &Apache::lonnet::logthis("Failed to close PIPE opened to retrieve image information for $inputfile");
+                }
+                chomp($imageinfo);
+                my ($fullsize) =
+                    ($imageinfo =~ /^\Q$inputfile\E\s+\w+\s+(\d+x\d+)/);
+                if ($fullsize) {
+                    ($fullwidth,$fullheight) = split(/x/,$fullsize);
+                }
+            }
+        }
+    }
+    return ($fullwidth,$fullheight);
+}
+
 sub bubblesheet_converter {
     my ($cdom,$fullpath,$config,$format) = @_;
     if ((&domain($cdom) ne '') &&
-        ($fullpath =~ m{^\Q$perlvar{'lonDocRoot'}/userfiles/$cdom/$match_courseid/scantron_orig}) &&
+        ($fullpath =~ m{^\Q$perlvar{'lonDocRoot'}/userfiles/$cdom/\E$match_courseid/scantron_orig}) &&
         (-e $fullpath) && (ref($config) eq 'HASH') && ($format ne '')) {
-        my %csvcols = %{$config};
+        my (%csvcols,%csvoptions);
+        if (ref($config->{'fields'}) eq 'HASH') {  
+            %csvcols = %{$config->{'fields'}};
+        }
+        if (ref($config->{'options'}) eq 'HASH') {
+            %csvoptions = %{$config->{'options'}};
+        }
         my %csvbynum = reverse(%csvcols);
         my %scantronconf = &get_scantron_config($format,$cdom);
         if (keys(%scantronconf)) {
@@ -4375,7 +4893,7 @@ sub bubblesheet_converter {
                         );
             my @ordered;
             foreach my $item (sort { $a <=> $b } keys(%bynum)) {
-                push (@ordered,$bynum{$item}));
+                push(@ordered,$bynum{$item});
             }
             my %mapstart = (
                               CODEstart => 'CODE',
@@ -4394,23 +4912,75 @@ sub bubblesheet_converter {
             );
             if (open(my $fh,'<',$fullpath)) {
                 my $output;
+                my %lettdig = &letter_to_digits();
+                my %diglett = reverse(%lettdig);
+                my $numletts = scalar(keys(%lettdig));
+                my $num = 0;
                 while (my $line=<$fh>) {
+                    $num ++;
+                    next if (($num == 1) && ($csvoptions{'hdr'} == 1));
                     $line =~ s{[\r\n]+$}{};
                     my %found;
-                    my @values = split(/,/,$line);
+                    my @values = split(/,/,$line,-1);
                     my ($qstart,$record);
                     for (my $i=0; $i<@values; $i++) {
-                        if (($qstart ne '') && ($i > $qstart)) {
-                            $found{'FirstQuestion'} .= $values[$i];
-                        } elsif (exists($csvbynum{$i})) {
+                        if ((($qstart ne '') && ($i > $qstart)) ||
+                            ($csvbynum{$i} eq 'FirstQuestion')) {
+                            if ($values[$i] eq '') {
+                                $values[$i] = $scantronconf{'Qoff'};
+                            } elsif ($scantronconf{'Qon'} eq 'number') {
+                                if ($values[$i] =~ /^[A-Ja-j]$/) {
+                                    $values[$i] = $lettdig{uc($values[$i])};
+                                }
+                            } elsif ($scantronconf{'Qon'} eq 'letter') {
+                                if ($values[$i] =~ /^[0-9]$/) {
+                                    $values[$i] = $diglett{$values[$i]};
+                                }
+                            } else {
+                                if ($values[$i] =~ /^[0-9A-Ja-j]$/) {
+                                    my $digit;
+                                    if ($values[$i] =~ /^[A-Ja-j]$/) {
+                                        $digit = $lettdig{uc($values[$i])}-1;
+                                        if ($values[$i] eq 'J') {
+                                            $digit += $numletts;
+                                        }
+                                    } elsif ($values[$i] =~ /^[0-9]$/) {
+                                        $digit = $values[$i]-1;
+                                        if ($values[$i] eq '0') {
+                                            $digit += $numletts;
+                                        }
+                                    }
+                                    my $qval='';
+                                    for (my $j=0; $j<$scantronconf{'Qlength'}; $j++) {
+                                        if ($j == $digit) {
+                                            $qval .= $scantronconf{'Qon'};
+                                        } else {
+                                            $qval .= $scantronconf{'Qoff'};
+                                        }
+                                    }
+                                    $values[$i] = $qval;
+                                }
+                            }
+                            if (length($values[$i]) > $scantronconf{'Qlength'}) {
+                                $values[$i] = substr($values[$i],0,$scantronconf{'Qlength'});
+                            }
+                            my $numblank = $scantronconf{'Qlength'} - length($values[$i]);
+                            if ($numblank > 0) {
+                                 $values[$i] .= ($scantronconf{'Qoff'} x $numblank);
+                            }
                             if ($csvbynum{$i} eq 'FirstQuestion') {
                                 $qstart = $i;
+                                $found{$csvbynum{$i}} = $values[$i];
                             } else {
+                                $found{'FirstQuestion'} .= $values[$i];
+                            }
+                        } elsif (exists($csvbynum{$i})) {
+                            if ($csvoptions{'rem'}) {
                                 $values[$i] =~ s/^\s+//;
-                                if ($csvbynum{$i} eq 'PaperID') {
-                                    while (length($values[$i]) < $scantronconf{$maplength{$csvbynum{$i}}}) {
-                                        $values[$i] = '0'.$values[$i];
-                                    }
+                            }
+                            if (($csvbynum{$i} eq 'PaperID') && ($csvoptions{'pad'})) {
+                                while (length($values[$i]) < $scantronconf{$maplength{$csvbynum{$i}}}) {
+                                    $values[$i] = '0'.$values[$i];
                                 }
                             }
                             $found{$csvbynum{$i}} = $values[$i];
@@ -4446,6 +5016,22 @@ sub bubblesheet_converter {
     }
 }
 
+sub letter_to_digits {
+    my %lettdig = (
+                    A => 1,
+                    B => 2,
+                    C => 3,
+                    D => 4,
+                    E => 5,
+                    F => 6,
+                    G => 7,
+                    H => 8,
+                    I => 9,
+                    J => 0,
+                  );
+    return %lettdig;
+}
+
 sub get_scantron_config {
     my ($which,$cdom) = @_;
     my @lines = &get_scantronformat_file($cdom);
@@ -4511,13 +5097,14 @@ sub get_scantronformat_file {
             if (open(my $fh,'<',$perlvar{'lonTabDir'}.'/scantronformat.tab')) {
                 @lines = <$fh>;
                 close($fh);
-            }  
+            }
         } else {
             if (open(my $fh,'<',$perlvar{'lonTabDir'}.'/default_scantronformat.tab')) {
                 @lines = <$fh>;
                 close($fh);
             }
         }
+        chomp(@lines);
     }
     return @lines;
 }
@@ -4639,6 +5226,29 @@ sub flushcourselogs {
             if (! defined($dom) || $dom eq '' || 
                 ! defined($name) || $name eq '') {
                 my $cid = $env{'request.course.id'};
+#
+# FIXME 11/29/2021
+# Typo in rev. 1.458 (2003/12/09)??
+# These should likely by $env{'course.'.$cid.'.domain'} and $env{'course.'.$cid.'.num'}
+#
+# While these remain as $env{'request.'.$cid.'.domain'} and $env{'request.'.$cid.'.num'}
+# $dom and $name will always be null, so the &inc() call will default to storing this data
+# in a nohist_accesscount.db file for the user rather than the course.
+#
+# That said there is a lot of noise in the data being stored.
+# So counts for prtspool/  and adm/ etc. are recorded.
+#
+# A review of which items ending '___count' are written to %accesshash should likely be 
+# made before deciding whether to set these to 'course.' instead of 'request.'
+#
+# Under the current scheme each user receives a nohist_accesscount.db file listing 
+# accesses for things which are not published resources, regardless of course, and
+# there is not a nohist_accesscount.db file in a course, which might log accesses from
+# anyone in the course for things which are not published resources.
+#
+# For an author, nohist_accesscount.db ends up having records for other items
+# mixed up with the legitimate access counts for the author's published resources.
+#
                 $dom  = $env{'request.'.$cid.'.domain'};
                 $name = $env{'request.'.$cid.'.num'};
             }
@@ -4665,7 +5275,7 @@ sub flushcourselogs {
     foreach my $entry (keys(%userrolehash)) {
         my ($role,$uname,$udom,$runame,$rudom,$rsec)=
 	    split(/\:/,$entry);
-        if (&Apache::lonnet::put('nohist_userroles',
+        if (&put('nohist_userroles',
              { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} },
                 $rudom,$runame) eq 'ok') {
 	    delete $userrolehash{$entry};
@@ -4748,7 +5358,11 @@ sub courseacclog {
                 if ($formitem =~ /^HWFILE(?:SIZE|TOOBIG)/) {
                     $what.=':'.$formitem.'='.$env{$key};
                 } elsif ($formitem !~ /^HWFILE(?:[^.]+)$/) {
-                    $what.=':'.$formitem.'='.$env{$key};
+                    if ($formitem eq 'proctorpassword') {
+                        $what.=':'.$formitem.'=' . '*' x length($env{$key});
+                    } else {
+                        $what.=':'.$formitem.'='.$env{$key};
+                    }
                 }
             }
         }
@@ -4828,7 +5442,8 @@ sub userrolelog {
 }
 
 sub courserolelog {
-    my ($trole,$username,$domain,$area,$tstart,$tend,$delflag,$selfenroll,$context)=@_;
+    my ($trole,$username,$domain,$area,$tstart,$tend,$delflag,$selfenroll,
+        $context,$othdomby,$requester)=@_;
     if ($area =~ m-^/($match_domain)/($match_courseid)/?([^/]*)-) {
         my $cdom = $1;
         my $cnum = $2;
@@ -4841,11 +5456,51 @@ sub courserolelog {
                            selfenroll => $selfenroll,
                            context    => $context,
                         );
+        if ($othdomby) {
+            if ($othdomby eq 'othdombydc') {
+                $storehash{'approval'} = 'domain';
+            } elsif ($othdomby eq 'othdombyuser') {
+                $storehash{'approval'} = 'user'; 
+            }
+            if ($requester ne '') {
+                $storehash{'requester'} = $requester;
+            }
+        }
         if ($trole eq 'gr') {
             $namespace = 'groupslog';
             $storehash{'group'} = $sec;
         } else {
             $storehash{'section'} = $sec;
+            my ($curruserdomstr,$newuserdomstr);
+            if (exists($env{'course.'.$cdom.'_'.$cnum.'.internal.userdomains'})) {
+                $curruserdomstr = $env{'course.'.$env{'request.course.id'}.'.internal.userdomains'};
+            } else {
+                my %courseinfo = &coursedescription($cdom.'/'.$cnum);
+                $curruserdomstr = $courseinfo{'internal.userdomains'};
+            }
+            if ($curruserdomstr ne '') {
+                my @udoms = split(/,/,$curruserdomstr);
+                unless (grep(/^\Q$domain\E/,@udoms)) {
+                    push(@udoms,$domain);
+                    $newuserdomstr = join(',',sort(@udoms));
+                }
+            } else {
+                $newuserdomstr = $domain;
+            }
+            if ($newuserdomstr ne '') {
+                my $putresult = &put('environment',{ 'internal.userdomains' => $newuserdomstr },
+                                     $cdom,$cnum);
+                if ($putresult eq 'ok') {
+                    unless (($selfenroll) || ($context eq 'selfenroll')) { 
+                        if (($context eq 'createcourse') || ($context eq 'requestcourses') ||
+                            ($context eq 'automated') || ($context eq 'domain')) {
+                            $env{'course.'.$cdom.'_'.$cnum.'.internal.userdomains'} = $newuserdomstr;
+                        } elsif ($env{'request.course.id'} eq $cdom.'_'.$cnum) {
+                            &appenv({'course.'.$cdom.'_'.$cnum.'.internal.userdomains' => $newuserdomstr});
+                        }
+                    }
+                }
+            }
         }
         &write_log('course',$namespace,\%storehash,$delflag,$username,
                    $domain,$cnum,$cdom);
@@ -4857,10 +5512,11 @@ sub courserolelog {
 }
 
 sub domainrolelog {
-    my ($trole,$username,$domain,$area,$tstart,$tend,$delflag,$context)=@_;
+    my ($trole,$username,$domain,$area,$tstart,$tend,$delflag,
+        $context,$othdomby,$requester)=@_;
     if ($area =~ m{^/($match_domain)/$}) {
         my $cdom = $1;
-        my $domconfiguser = &Apache::lonnet::get_domainconfiguser($cdom);
+        my $domconfiguser = &get_domainconfiguser($cdom);
         my $namespace = 'rolelog';
         my %storehash = (
                            role    => $trole,
@@ -4868,6 +5524,16 @@ sub domainrolelog {
                            end     => $tend,
                            context => $context,
                         );
+        if ($othdomby) {
+            if ($othdomby eq 'othdombydc') {
+                $storehash{'approval'} = 'domain';
+            } elsif ($othdomby eq 'othdombyuser') {
+                $storehash{'approval'} = 'user';
+            }
+            if ($requester ne '') {
+                $storehash{'requester'} = $requester;
+            }
+        }
         &write_log('domain',$namespace,\%storehash,$delflag,$username,
                    $domain,$domconfiguser,$cdom);
     }
@@ -4876,7 +5542,8 @@ sub domainrolelog {
 }
 
 sub coauthorrolelog {
-    my ($trole,$username,$domain,$area,$tstart,$tend,$delflag,$context)=@_;
+    my ($trole,$username,$domain,$area,$tstart,$tend,$delflag,
+        $context,$othdomby,$requester)=@_;
     if ($area =~ m{^/($match_domain)/($match_username)$}) {
         my $audom = $1;
         my $auname = $2;
@@ -4887,6 +5554,16 @@ sub coauthorrolelog {
                            end     => $tend,
                            context => $context,
                         );
+        if ($othdomby) {
+            if ($othdomby eq 'othdombydc') {
+                $storehash{'approval'} = 'domain';
+            } elsif ($othdomby eq 'othdombyuser') {
+                $storehash{'approval'} = 'user';
+            }
+            if ($requester ne '') {
+                $storehash{'requester'} = $requester;
+            }
+        }
         &write_log('author',$namespace,\%storehash,$delflag,$username,
                    $domain,$auname,$audom);
     }
@@ -5091,8 +5768,8 @@ sub get_my_adhocroles {
     } elsif ($cid =~ /^($match_domain)_($match_courseid)$/) {
         $cdom = $1;
         $cnum = $2;
-        %info = &Apache::lonnet::get('environment',['internal.coursecode'],
-                                     $cdom,$cnum);
+        %info = &get('environment',['internal.coursecode'],
+                     $cdom,$cnum);
     }
     if (($info{'internal.coursecode'} ne '') && ($checkreg)) {
         my $user = $env{'user.name'}.':'.$env{'user.domain'};
@@ -5419,7 +6096,7 @@ sub extract_lastaccess {
 
 sub dcmailput {
     my ($domain,$msgid,$message,$server)=@_;
-    my $status = &Apache::lonnet::critical(
+    my $status = &critical(
        'dcmailput:'.$domain.':'.&escape($msgid).'='.
        &escape($message),$server);
     return $status;
@@ -5830,7 +6507,7 @@ sub tmpreset {
   if (!$domain) { $domain=$env{'user.domain'}; }
   if (!$stuname) { $stuname=$env{'user.name'}; }
   if ($domain eq 'public' && $stuname eq 'public') {
-      $stuname=$ENV{'REMOTE_ADDR'};
+      $stuname=&get_requestor_ip();
   }
   my $path=LONCAPA::tempdir();
   my %hash;
@@ -5867,7 +6544,7 @@ sub tmpstore {
   if (!$domain) { $domain=$env{'user.domain'}; }
   if (!$stuname) { $stuname=$env{'user.name'}; }
   if ($domain eq 'public' && $stuname eq 'public') {
-      $stuname=$ENV{'REMOTE_ADDR'};
+      $stuname=&get_requestor_ip();
   }
   my $now=time;
   my %hash;
@@ -5911,7 +6588,7 @@ sub tmprestore {
   if (!$domain) { $domain=$env{'user.domain'}; }
   if (!$stuname) { $stuname=$env{'user.name'}; }
   if ($domain eq 'public' && $stuname eq 'public') {
-      $stuname=$ENV{'REMOTE_ADDR'};
+      $stuname=&get_requestor_ip();
   }
   my %returnhash;
   $namespace=~s/\//\_/g;
@@ -5967,7 +6644,7 @@ sub store {
     }
     if (!$home) { $home=$env{'user.home'}; }
 
-    $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
+    $$storehash{'ip'}=&get_requestor_ip();
     $$storehash{'host'}=$perlvar{'lonHostID'};
 
     my $namevalue='';
@@ -6003,7 +6680,7 @@ sub cstore {
     }
     if (!$home) { $home=$env{'user.home'}; }
 
-    $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
+    $$storehash{'ip'}=&get_requestor_ip();
     $$storehash{'host'}=$perlvar{'lonHostID'};
 
     my $namevalue='';
@@ -6421,31 +7098,31 @@ sub course_adhocrole_privs {
             $full{$priv} = $restrict;
         }
         foreach my $item (split(/,/,$overrides{"internal.adhocpriv.$rolename"})) {
-             next if ($item eq '');
-             my ($rule,$rest) = split(/=/,$item);
-             next unless (($rule eq 'off') || ($rule eq 'on'));
-             foreach my $priv (split(/:/,$rest)) {
-                 if ($priv ne '') {
-                     if ($rule eq 'off') {
-                         $possremove{$priv} = 1;
-                     } else {
-                         $possadd{$priv} = 1;
-                     }
-                 }
-             }
-         }
-         foreach my $priv (sort(keys(%full))) {
-             if (exists($currprivs{$priv})) {
-                 unless (exists($possremove{$priv})) {
-                     $storeprivs{$priv} = $currprivs{$priv};
-                 }
-             } elsif (exists($possadd{$priv})) {
-                 $storeprivs{$priv} = $full{$priv};
-             }
-         }
-         $coursepriv = ':'.join(':',map { $_.'&'.$storeprivs{$_}; } sort(keys(%storeprivs)));
-     }
-     return $coursepriv;
+            next if ($item eq '');
+            my ($rule,$rest) = split(/=/,$item);
+            next unless (($rule eq 'off') || ($rule eq 'on'));
+            foreach my $priv (split(/:/,$rest)) {
+                if ($priv ne '') {
+                    if ($rule eq 'off') {
+                        $possremove{$priv} = 1;
+                    } else {
+                        $possadd{$priv} = 1;
+                    }
+                }
+            }
+        }
+        foreach my $priv (sort(keys(%full))) {
+            if (exists($currprivs{$priv})) {
+                unless (exists($possremove{$priv})) {
+                    $storeprivs{$priv} = $currprivs{$priv};
+                }
+            } elsif (exists($possadd{$priv})) {
+                $storeprivs{$priv} = $full{$priv};
+            }
+        }
+        $coursepriv = ':'.join(':',map { $_.'&'.$storeprivs{$_}; } sort(keys(%storeprivs)));
+    }
+    return $coursepriv;
 }
 
 sub group_roleprivs {
@@ -6786,7 +7463,7 @@ sub unserialize {
 # see Lond::dump_with_regexp
 # if $escapedkeys hash keys won't get unescaped.
 sub dump {
-    my ($namespace,$udomain,$uname,$regexp,$range,$escapedkeys)=@_;
+    my ($namespace,$udomain,$uname,$regexp,$range,$escapedkeys,$encrypt)=@_;
     if (!$udomain) { $udomain=$env{'user.domain'}; }
     if (!$uname) { $uname=$env{'user.name'}; }
     my $uhome=&homeserver($uname,$udomain);
@@ -6802,7 +7479,12 @@ sub dump {
                     $uname, $namespace, $regexp, $range)), $perlvar{'lonVersion'});
         return %{unserialize($reply, $escapedkeys)};
     }
-    my $rep=&reply("dump:$udomain:$uname:$namespace:$regexp:$range",$uhome);
+    my $rep;
+    if ($encrypt) {
+        $rep=&reply("encrypt:edump:$udomain:$uname:$namespace:$regexp:$range",$uhome);
+    } else {
+        $rep=&reply("dump:$udomain:$uname:$namespace:$regexp:$range",$uhome);
+    }
     my @pairs=split(/\&/,$rep);
     my %returnhash=();
     if (!($rep =~ /^error/ )) {
@@ -6949,7 +7631,7 @@ sub inc {
 # --------------------------------------------------------------- put interface
 
 sub put {
-   my ($namespace,$storehash,$udomain,$uname)=@_;
+   my ($namespace,$storehash,$udomain,$uname,$encrypt)=@_;
    if (!$udomain) { $udomain=$env{'user.domain'}; }
    if (!$uname) { $uname=$env{'user.name'}; }
    my $uhome=&homeserver($uname,$udomain);
@@ -6958,7 +7640,11 @@ sub put {
        $items.=&escape($item).'='.&freeze_escape($$storehash{$item}).'&';
    }
    $items=~s/\&$//;
-   return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
+   if ($encrypt) {
+       return &reply("encrypt:put:$udomain:$uname:$namespace:$items",$uhome);
+   } else {
+       return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
+   }
 }
 
 # ------------------------------------------------------------ newput interface
@@ -6998,11 +7684,12 @@ sub putstore {
        foreach my $key (keys(%{$storehash})) {
            $namevalue.=&escape($key).'='.&freeze_escape($storehash->{$key}).'&';
        }
-       $namevalue .= 'ip='.&escape($ENV{'REMOTE_ADDR'}).
+       my $ip = &get_requestor_ip();
+       $namevalue .= 'ip='.&escape($ip).
                      '&host='.&escape($perlvar{'lonHostID'}).
                      '&version='.$esc_v.
                      '&by='.&escape($env{'user.name'}.':'.$env{'user.domain'});
-       &Apache::lonnet::courselog($symb.':'.$uname.':'.$udomain.':PUTSTORE:'.$namevalue);
+       &courselog($symb.':'.$uname.':'.$udomain.':PUTSTORE:'.$namevalue);
    }
    if ($reply eq 'unknown_cmd') {
        # gfall back to way things use to be done
@@ -7152,16 +7839,16 @@ sub get_timebased_id {
     my $tries = 0;
 
 # attempt to get lock on nohist_$namespace file
-    my $gotlock = &Apache::lonnet::newput('nohist_'.$namespace,$lockhash,$cdom,$cnum);
+    my $gotlock = &newput('nohist_'.$namespace,$lockhash,$cdom,$cnum);
     while (($gotlock ne 'ok') && $tries <$locktries) {
         $tries ++;
         sleep 1;
-        $gotlock = &Apache::lonnet::newput('nohist_'.$namespace,$lockhash,$cdom,$cnum);
+        $gotlock = &newput('nohist_'.$namespace,$lockhash,$cdom,$cnum);
     }
 
 # attempt to get unique identifier, based on current timestamp
     if ($gotlock eq 'ok') {
-        my %inuse = &Apache::lonnet::dump('nohist_'.$namespace,$cdom,$cnum,$prefix);
+        my %inuse = &dump('nohist_'.$namespace,$cdom,$cnum,$prefix);
         my $id = time;
         $newid = $id;
         if ($idtype eq 'addcode') {
@@ -7182,7 +7869,7 @@ sub get_timebased_id {
             my %new_item =  (
                               $prefix."\0".$newid => $who,
                             );
-            my $putresult = &Apache::lonnet::put('nohist_'.$namespace,\%new_item,
+            my $putresult = &put('nohist_'.$namespace,\%new_item,
                                                  $cdom,$cnum);
             if ($putresult ne 'ok') {
                 undef($newid);
@@ -7222,15 +7909,15 @@ sub portfolio_access {
     if ($result) {
         my %setters;
         if ($env{'user.name'} eq 'public' && $env{'user.domain'} eq 'public') {
-            my ($startblock,$endblock) =
-                &Apache::loncommon::blockcheck(\%setters,'port',$unum,$udom);
-            if ($startblock && $endblock) {
+            my ($startblock,$endblock,$triggerblock,$by_ip,$blockdom) =
+                &Apache::loncommon::blockcheck(\%setters,'port',$clientip,$unum,$udom);
+            if (($startblock && $endblock) || ($by_ip)) {
                 return 'B';
             }
         } else {
-            my ($startblock,$endblock) =
-                &Apache::loncommon::blockcheck(\%setters,'port');
-            if ($startblock && $endblock) {
+            my ($startblock,$endblock,$triggerblock,$by_ip,$blockdom) =
+                &Apache::loncommon::blockcheck(\%setters,'port',$clientip);
+            if (($startblock && $endblock) || ($by_ip)) {
                 return 'B';
             }
         }
@@ -7471,6 +8158,17 @@ sub is_portfolio_file {
     return;
 }
 
+sub is_coursetool_logo {
+    my ($uri) = @_;
+    if ($env{'request.course.id'}) {
+        my $courseurl = &courseid_to_courseurl($env{'request.course.id'});
+        if ($uri =~ m{^/*uploaded\Q$courseurl\E/toollogo/\d+/[^/]+$}) {
+            return 1;
+        }
+    }
+    return;
+}
+
 sub usertools_access {
     my ($uname,$udom,$tool,$action,$context,$userenvref,$domdefref,$is_advref)=@_;
     my ($access,%tools);
@@ -7496,6 +8194,7 @@ sub usertools_access {
                       blog      => 1,
                       webdav    => 1,
                       portfolio => 1,
+                      timezone  => 1,
                  );
     }
     return if (!defined($tools{$tool}));
@@ -7620,7 +8319,7 @@ sub is_course_owner {
             if ($env{'course.'.$cdom.'_'.$cnum.'.internal.courseowner'} eq $uname.':'.$udom) {
                 return 1;
             } else {
-                my %courseinfo = &Apache::lonnet::coursedescription($cdom.'/'.$cnum);
+                my %courseinfo = &coursedescription($cdom.'/'.$cnum);
                 if ($courseinfo{'internal.courseowner'} eq $uname.':'.$udom) {
                     return 1;
                 }
@@ -7631,7 +8330,8 @@ sub is_course_owner {
 }
 
 sub is_advanced_user {
-    my ($udom,$uname) = @_;
+    my ($udom,$uname,$nocache) = @_;
+    my ($is_adv,$is_author,$use_cache,$hashid);
     if ($udom ne '' && $uname ne '') {
         if (($udom eq $env{'user.domain'}) && ($uname eq $env{'user.name'})) {
             if (wantarray) {
@@ -7639,11 +8339,21 @@ sub is_advanced_user {
             } else {
                 return $env{'user.adv'};
             }
+        } elsif (!$nocache) {
+            $use_cache = 1;
+            $hashid = "$udom:$uname";  
+            my ($info,$cached)=&is_cached_new('isadvau',$hashid);
+            if ($cached) {
+                ($is_adv,$is_author) = split(/:/,$info);
+                if (wantarray) {
+                    return ($is_adv,$is_author);
+                }
+                return $is_adv; 
+            }
         }
     }
     my %roleshash = &get_my_roles($uname,$udom,'userroles',undef,undef,undef,1);
     my %allroles;
-    my ($is_adv,$is_author);
     foreach my $role (keys(%roleshash)) {
         my ($trest,$tdomain,$trole,$sec) = split(/:/,$role);
         my $area = '/'.$tdomain.'/'.$trest;
@@ -7674,6 +8384,10 @@ sub is_advanced_user {
             }
         }
     }
+    if ($use_cache) {
+        my $cachetime = 600;
+        &do_cache_new('isadvau',$hashid,$is_adv.':'.$is_author,$cachetime);
+    }
     if (wantarray) {
         return ($is_adv,$is_author);
     }
@@ -7691,6 +8405,7 @@ sub check_can_request {
     my @options = ('approval','validate','autolimit');
     my $optregex = join('|',@options);
     if ((ref($can_request) eq 'HASH') && (ref($types) eq 'ARRAY')) {
+        my %willtrust;
         foreach my $type (@{$types}) {
             if (&usertools_access($uname,$udom,$type,undef,
                                   'requestcourses')) {
@@ -7710,12 +8425,17 @@ sub check_can_request {
                         if (ref($request_domains) eq 'HASH') {
                             my ($otherdom) = ($item =~ /^($match_domain):($optregex)(=?\d*)$/);
                             if ($otherdom ne '') {
-                                if (ref($request_domains->{$type}) eq 'ARRAY') {
-                                    unless (grep(/^\Q$otherdom\E$/,@{$request_domains->{$type}})) {
+                                unless (exists($willtrust{$otherdom})) {
+                                    $willtrust{$otherdom} = &will_trust('reqcrs',$env{'user.domain'},$otherdom);
+                                }
+                                if ($willtrust{$otherdom}) {
+                                    if (ref($request_domains->{$type}) eq 'ARRAY') {
+                                        unless (grep(/^\Q$otherdom\E$/,@{$request_domains->{$type}})) {
+                                            push(@{$request_domains->{$type}},$otherdom);
+                                        }
+                                    } else {
                                         push(@{$request_domains->{$type}},$otherdom);
                                     }
-                                } else {
-                                    push(@{$request_domains->{$type}},$otherdom);
                                 }
                             }
                         }
@@ -7785,14 +8505,14 @@ sub customaccess {
 # ------------------------------------------------- Check for a user privilege
 
 sub allowed {
-    my ($priv,$uri,$symb,$role,$clientip,$noblockcheck)=@_;
+    my ($priv,$uri,$symb,$role,$clientip,$noblockcheck,$ignorecache,$nodeeplinkcheck,$nodeeplinkout)=@_;
     my $ver_orguri=$uri;
     $uri=&deversion($uri);
     my $orguri=$uri;
     $uri=&declutter($uri);
 
     if ($priv eq 'evb') {
-# Evade communication block restrictions for specified role in a course
+# Evade communication block restrictions for specified role in a course or domain
         if ($env{'user.priv.'.$role} =~/evb\&([^\:]*)/) {
             return $1;
         } else {
@@ -7802,7 +8522,7 @@ sub allowed {
 
     if (defined($env{'allowed.'.$priv})) { return $env{'allowed.'.$priv}; }
 # Free bre access to adm and meta resources
-    if (((($uri=~/^adm\//) && ($uri !~ m{/(?:smppg|bulletinboard|ext\.tool)$})) 
+    if (((($uri=~/^adm\//) && ($uri !~ m{/(?:smppg|bulletinboard|viewclasslist|aboutme|ext\.tool)$})) 
 	 || (($uri=~/\.meta$/) && ($uri!~m|^uploaded/|) )) 
 	&& ($priv eq 'bre')) {
 	return 'F';
@@ -7813,9 +8533,9 @@ sub allowed {
     if (($space=~/^(uploaded|editupload)$/) && ($env{'user.name'} eq $name) && 
 	($env{'user.domain'} eq $domain) && ('portfolio' eq $dir[0])) {
         my %setters;
-        my ($startblock,$endblock) = 
-            &Apache::loncommon::blockcheck(\%setters,'port');
-        if ($startblock && $endblock) {
+        my ($startblock,$endblock,$triggerblock,$by_ip,$blockdom) = 
+            &Apache::loncommon::blockcheck(\%setters,'port',$clientip);
+        if (($startblock && $endblock) || ($by_ip)) {
             return 'B';
         } else {
             return 'F';
@@ -7911,8 +8631,8 @@ sub allowed {
                         my $adom = $1;
                         foreach my $key (keys(%env)) {
                             if ($key =~ m{^user\.role\.(ca|aa)/\Q$adom\E}) {
-                                my ($start,$end) = split('.',$env{$key});
-                                if (($now >= $start) && (!$end || $end < $now)) {
+                                my ($start,$end) = split(/\./,$env{$key});
+                                if (($now >= $start) && (!$end || $end > $now)) {
                                     $ownaccess = 1;
                                     last;
                                 }
@@ -7924,8 +8644,8 @@ sub allowed {
                         foreach my $role ('ca','aa') { 
                             if ($env{"user.role.$role./$adom/$aname"}) {
                                 my ($start,$end) =
-                                    split('.',$env{"user.role.$role./$adom/$aname"});
-                                if (($now >= $start) && (!$end || $end < $now)) {
+                                    split(/\./,$env{"user.role.$role./$adom/$aname"});
+                                if (($now >= $start) && (!$end || $end > $now)) {
                                     $ownaccess = 1;
                                     last;
                                 }
@@ -7970,8 +8690,34 @@ sub allowed {
 
     if ($env{'user.priv.'.$env{'request.role'}.'.'.$courseuri}
        =~/\Q$priv\E\&([^\:]*)/) {
-        unless (($priv eq 'bro') && (!$ownaccess)) {
-            $thisallowed.=$1;
+        if ($priv eq 'mip') {
+            my $rem = $1;
+            if (($uri ne '') && ($env{'request.course.id'} eq $uri) &&
+                ($env{'course.'.$env{'request.course.id'}.'.internal.courseowner'} eq $env{'user.name'}.':'.$env{'user.domain'})) {
+                my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
+                if ($cdom ne '') {
+                    my %passwdconf = &get_passwdconf($cdom);
+                    if (ref($passwdconf{'crsownerchg'}) eq 'HASH') {
+                        if (ref($passwdconf{'crsownerchg'}{'by'}) eq 'ARRAY') {
+                            if (@{$passwdconf{'crsownerchg'}{'by'}}) {
+                                my @inststatuses = split(':',$env{'environment.inststatus'});
+                                unless (@inststatuses) {
+                                    @inststatuses = ('default');
+                                }
+                                foreach my $status (@inststatuses) {
+                                    if (grep(/^\Q$status\E$/,@{$passwdconf{'crsownerchg'}{'by'}})) {
+                                        $thisallowed.=$rem;
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        } else {
+            unless (($priv eq 'bro') && (!$ownaccess)) {
+                $thisallowed.=$1;
+            }
         }
     }
 
@@ -7984,13 +8730,16 @@ sub allowed {
             if ($env{'user.priv.'.$env{'request.role'}.'./'}
                   =~/\Q$priv\E\&([^\:]*)/) {
                 my $value = $1;
-                my $deeplinkblock = &deeplink_check($priv,$symb,$uri);
+                my $deeplinkblock;
+                unless ($nodeeplinkcheck) {
+                    $deeplinkblock = &deeplink_check($priv,$symb,$uri);
+                }
                 if ($deeplinkblock) {
                     $thisallowed='D';
                 } elsif ($noblockcheck) {
                     $thisallowed.=$value;
                 } else {
-                    my @blockers = &has_comm_blocking($priv,$symb,$uri);
+                    my @blockers = &has_comm_blocking($priv,$symb,$uri,$ignorecache);
                     if (@blockers > 0) {
                         $thisallowed = 'B';
                     } else {
@@ -8007,13 +8756,16 @@ sub allowed {
                     $refuri=&declutter($refuri);
                     my ($match) = &is_on_map($refuri);
                     if ($match) {
-                        my $deeplinkblock = &deeplink_check($priv,$symb,$refuri);
+                        my $deeplinkblock;
+                        unless ($nodeeplinkcheck) {
+                            $deeplinkblock = &deeplink_check($priv,$symb,$refuri);
+                        }
                         if ($deeplinkblock) {
                             $thisallowed='D';
                         } elsif ($noblockcheck) {
                             $thisallowed='F';
                         } else {
-                            my @blockers = &has_comm_blocking($priv,$symb,$refuri);
+                            my @blockers = &has_comm_blocking($priv,'',$refuri,'',1);
                             if (@blockers > 0) {
                                 $thisallowed = 'B';
                             } else {
@@ -8060,6 +8812,22 @@ sub allowed {
 
     if ($env{'request.course.id'}) {
 
+        if ($priv eq 'bre') {
+            if (&is_coursetool_logo($uri)) {
+                return 'F';
+            }
+        }
+
+# If this is modifying password (internal auth) domains must match for user and user's role.
+
+        if ($priv eq 'mip') {
+            if ($env{'user.domain'} eq $env{'request.role.domain'}) {
+                return $thisallowed;
+            } else {
+                return '';
+            }
+        }
+
        $courseprivid=$env{'request.course.id'};
        if ($env{'request.course.sec'}) {
           $courseprivid.='/'.$env{'request.course.sec'};
@@ -8073,10 +8841,16 @@ sub allowed {
                =~/\Q$priv\E\&([^\:]*)/) {
                my $value = $1;
                if ($priv eq 'bre') {
-                   if ($noblockcheck) {
+                   my $deeplinkblock;
+                   unless ($nodeeplinkcheck) {
+                       $deeplinkblock = &deeplink_check($priv,$symb,$uri);
+                   }
+                   if ($deeplinkblock) {
+                       $thisallowed = 'D';
+                   } elsif ($noblockcheck) {
                        $thisallowed.=$value;
                    } else {
-                       my @blockers = &has_comm_blocking($priv,$symb,$uri);
+                       my @blockers = &has_comm_blocking($priv,$symb,$uri,$ignorecache);
                        if (@blockers > 0) {
                            $thisallowed = 'B';
                        } else {
@@ -8089,7 +8863,7 @@ sub allowed {
                $checkreferer=0;
            }
        }
-       
+
        if ($checkreferer) {
 	  my $refuri=$env{'httpref.'.$orguri};
             unless ($refuri) {
@@ -8115,13 +8889,16 @@ sub allowed {
                   =~/\Q$priv\E\&([^\:]*)/) {
                   my $value = $1;
                   if ($priv eq 'bre') {
-                      my $deeplinkblock = &deeplink_check($priv,$symb,$refuri);
+                      my $deeplinkblock;
+                      unless ($nodeeplinkcheck) {
+                          $deeplinkblock = &deeplink_check($priv,$symb,$refuri);
+                      }
                       if ($deeplinkblock) {
                           $thisallowed = 'D';
                       } elsif ($noblockcheck) {
                           $thisallowed.=$value;
                       } else {
-                          my @blockers = &has_comm_blocking($priv,$symb,$refuri);
+                          my @blockers = &has_comm_blocking($priv,'',$refuri,'',1);
                           if (@blockers > 0) {
                               $thisallowed = 'B';
                           } else {
@@ -8163,16 +8940,48 @@ sub allowed {
 #
 
 # Possibly locked functionality, check all courses
+# In roles.tab, L (unless locked) available for bre, pch, plc, pac and sma.
 # Locks might take effect only after 10 minutes cache expiration for other
-# courses, and 2 minutes for current course
+# courses, and 2 minutes for current course, in which user has st or ta role
+# which is neither expired nor a future role (unless current course).
 
-    my $envkey;
+    my ($needlockcheck,$now,$crsonly);
     if ($thisallowed=~/L/) {
-        foreach $envkey (keys(%env)) {
+        $now = time;
+        if ($priv eq 'bre') {
+            if ($uri ne '') {
+                if ($orguri =~ m{^/+res/}) {
+                    if ($uri =~ m{^lib/templates/}) {
+                        if ($env{'request.course.id'}) {
+                            $crsonly = 1;
+                            $needlockcheck = 1;
+                        }
+                    } else {
+                        $needlockcheck = 1;
+                    }
+                } elsif ($env{'request.course.id'}) {
+                    my ($crsdom,$crsnum) = split('_',$env{'request.course.id'});
+                    if (($uri =~ m{^(adm|uploaded|public)/$crsdom/$crsnum/}) ||
+                        ($uri =~ m{^adm/$match_domain/$match_username/\d+/(smppg|bulletinboard)$})) {
+                        $crsonly = 1;
+                    }
+                    $needlockcheck = 1;
+                }
+            }
+        } elsif (($priv eq 'pch') || ($priv eq 'plc') || ($priv eq 'pac') || ($priv eq 'sma')) {
+            $needlockcheck = 1;
+        }
+    }
+    if ($needlockcheck) {
+        foreach my $envkey (keys(%env)) {
            if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
                my $courseid=$2;
                my $roleid=$1.'.'.$2;
                $courseid=~s/^\///;
+               unless ($env{'request.role'} eq $roleid) {
+                   my ($start,$end) = split(/\./,$env{$envkey});
+                   next unless (($now >= $start) && (!$end || $end > $now));
+               }
                my $expiretime=600;
                if ($env{'request.role'} eq $roleid) {
 		  $expiretime=120;
@@ -8195,7 +9004,7 @@ sub allowed {
                }
                if (($env{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,\Q$csec\E\,/)
                 || ($env{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
-		   if ($env{'priv.'.$priv.'.lock.expire'}>time) {
+		   if ($env{$prefix.'priv.'.$priv.'.lock.expire'}>time) {
                        &log($env{'user.domain'},$env{'user.name'},
                             $env{'user.home'},
                             'Locked by priv: '.$priv.' for '.$uri.' due to '.
@@ -8207,7 +9016,7 @@ sub allowed {
 	   }
        }
     }
-   
+
 #
 # Rest of the restrictions depend on selected course
 #
@@ -8266,6 +9075,17 @@ sub allowed {
        }
    }
 
+# Restricted for deeplinked session?
+
+    if ($env{'request.deeplink.login'}) {
+        if ($env{'acc.deeplinkout'} && !$nodeeplinkout) {
+            if (!$symb) { $symb=&symbread($uri,1); }
+            if (($symb) && ($env{'acc.deeplinkout'}=~/\&\Q$symb\E\&/)) {
+                return '';
+            }
+        }
+    }
+
 # Restricted by state or randomout?
 
    if ($thisallowed=~/X/) {
@@ -8318,13 +9138,8 @@ sub constructaccess {
        if (exists($env{'user.priv.au./'.$ownerdomain.'/./'})) {
           return ($ownername,$ownerdomain,$ownerhome);
        }
-    } else {
-# Co-author for this?
-        if (exists($env{'user.priv.ca./'.$ownerdomain.'/'.$ownername.'./'}) ||
-            exists($env{'user.priv.aa./'.$ownerdomain.'/'.$ownername.'./'}) ) {
-            $ownerhome = &homeserver($ownername,$ownerdomain);
-            return ($ownername,$ownerdomain,$ownerhome);
-        }
+    } elsif (&is_course($ownerdomain,$ownername)) {
+# Course Authoring Space?
         if ($env{'request.course.id'}) {
             if (($ownername eq $env{'course.'.$env{'request.course.id'}.'.num'}) &&
                 ($ownerdomain eq $env{'course.'.$env{'request.course.id'}.'.domain'})) {
@@ -8334,6 +9149,14 @@ sub constructaccess {
                 }
             }
         }
+        return '';
+    } else {
+# Co-author for this?
+        if (exists($env{'user.priv.ca./'.$ownerdomain.'/'.$ownername.'./'}) ||
+            exists($env{'user.priv.aa./'.$ownerdomain.'/'.$ownername.'./'}) ) {
+            $ownerhome = &homeserver($ownername,$ownerdomain);
+            return ($ownername,$ownerdomain,$ownerhome);
+        }
     }
 
 # We don't have any access right now. If we are not possibly going to do anything about this,
@@ -8376,22 +9199,27 @@ sub constructaccess {
 #
 # User for whom data are being temporarily cached.
 my $cacheduser='';
+# Course for which data are being temporarily cached.
+my $cachedcid='';
 # Cached blockers for this user (a hash of blocking items). 
 my %cachedblockers=();
 # When the data were last cached.
 my $cachedlast='';
 
 sub load_all_blockers {
-    my ($uname,$udom,$blocks)=@_;
+    my ($uname,$udom)=@_;
     if (($uname ne '') && ($udom ne '')) { 
         if (($cacheduser eq $uname.':'.$udom) &&
+            ($cachedcid eq $env{'request.course.id'}) &&
             (abs($cachedlast-time)<5)) {
             return;
         }
     }
     $cachedlast=time;
     $cacheduser=$uname.':'.$udom;
-    %cachedblockers = &get_commblock_resources($blocks);
+    $cachedcid=$env{'request.course.id'};
+    %cachedblockers = &get_commblock_resources();
+    return;
 }
 
 sub get_comm_blocks {
@@ -8407,7 +9235,7 @@ sub get_comm_blocks {
     if ((defined($cached)) && (ref($blocksref) eq 'HASH')) {
         %commblocks = %{$blocksref};
     } else {
-        %commblocks = &Apache::lonnet::dump('comm_block',$cdom,$cnum);
+        %commblocks = &dump('comm_block',$cdom,$cnum);
         my $cachetime = 600;
         &do_cache_new('comm_block',$hashid,\%commblocks,$cachetime);
     }
@@ -8418,7 +9246,11 @@ sub get_commblock_resources {
     my ($blocks) = @_;
     my %blockers = ();
     return %blockers unless ($env{'request.course.id'});
-    return %blockers if ($env{'user.priv.'.$env{'request.role'}} =~/evb\&([^\:]*)/);
+    my $courseurl = &courseid_to_courseurl($env{'request.course.id'});
+    if ($env{'request.course.sec'}) {
+        $courseurl .= '/'.$env{'request.course.sec'};
+    }
+    return %blockers if ($env{'user.priv.'.$env{'request.role'}.'.'.$courseurl} =~/evb\&([^\:]*)/);
     my %commblocks;
     if (ref($blocks) eq 'HASH') {
         %commblocks = %{$blocks};
@@ -8450,10 +9282,9 @@ sub get_commblock_resources {
             }
         } elsif ($block =~ /^firstaccess____(.+)$/) {
             my $item = $1;
-            my @to_test;
             if (ref($commblocks{$block}{'blocks'}) eq 'HASH') {
                 if (ref($commblocks{$block}{'blocks'}{'docs'}) eq 'HASH') {
-                    my @interval;
+                    my (@interval,$mapname);
                     my $type = 'map';
                     if ($item eq 'course') {
                         $type = 'course';
@@ -8462,27 +9293,11 @@ sub get_commblock_resources {
                         if ($item =~ /___\d+___/) {
                             $type = 'resource';
                             @interval=&EXT("resource.0.interval",$item);
-                            if (ref($navmap)) {                        
-                                my $res = $navmap->getBySymb($item); 
-                                push(@to_test,$res);
-                            }
                         } else {
-                            my $mapsymb = &symbread($item,1);
-                            if ($mapsymb) {
-                                if (ref($navmap)) {
-                                    my $mapres = $navmap->getBySymb($mapsymb);
-                                    @to_test = $mapres->retrieveResources($mapres,undef,0,0,0,1);
-                                    foreach my $res (@to_test) {
-                                        my $symb = $res->symb();
-                                        next if ($symb eq $mapsymb);
-                                        if ($symb ne '') {
-                                            @interval=&EXT("resource.0.interval",$symb);
-                                            if ($interval[1] eq 'map') {
-                                                last;
-                                            }
-                                        }
-                                    }
-                                }
+                            $mapname = &deversion($item);
+                            if (ref($navmap)) {
+                                my $timelimit = $navmap->get_mapparam(undef,$mapname,'0.interval');
+                                @interval = ($timelimit,'map');
                             }
                         }
                     }
@@ -8500,10 +9315,37 @@ sub get_commblock_resources {
                             my $timesup = $first_access+$timelimit;
                             if ($timesup > $now) {
                                 my $activeblock;
-                                foreach my $res (@to_test) {
-                                    if ($res->answerable()) {
-                                        $activeblock = 1;
-                                        last;
+                                if ($type eq 'resource') {
+                                    if (ref($navmap)) {
+                                        my $res = $navmap->getBySymb($item);
+                                        if ($res->answerable()) {
+                                            $activeblock = 1;
+                                        }
+                                    }
+                                } elsif ($type eq 'map') {
+                                    my $mapsymb = &symbread($mapname,1);
+                                    if (($mapsymb) && (ref($navmap))) {
+                                        my $mapres = $navmap->getBySymb($mapsymb);
+                                        if (ref($mapres)) {
+                                            my $first = $mapres->map_start();
+                                            my $finish = $mapres->map_finish();
+                                            my $it = $navmap->getIterator($first,$finish,undef,0,0);
+                                            if (ref($it)) {
+                                                my $res;
+                                                while ($res = $it->next(undef,1)) {
+                                                    next unless (ref($res));
+                                                    my $symb = $res->symb();
+                                                    next if (($symb eq $mapsymb) || ($symb eq ''));
+                                                    @interval=&EXT("resource.0.interval",$symb);
+                                                    if ($interval[1] eq 'map') {
+                                                        if ($res->answerable()) {
+                                                            $activeblock = 1;
+                                                            last;
+                                                        }
+                                                    }
+                                                }
+                                            }
+                                        }
                                     }
                                 }
                                 if ($activeblock) {
@@ -8529,17 +9371,27 @@ sub get_commblock_resources {
 }
 
 sub has_comm_blocking {
-    my ($priv,$symb,$uri,$blocks) = @_;
+    my ($priv,$symb,$uri,$ignoresymbdb,$noenccheck,$blocked,$blocks) = @_;
     my @blockers;
     return unless ($env{'request.course.id'});
     return unless ($priv eq 'bre');
-    return if ($env{'user.priv.'.$env{'request.role'}} =~/evb\&([^\:]*)/);
     return if ($env{'request.state'} eq 'construct');
-    &load_all_blockers($env{'user.name'},$env{'user.domain'},$blocks);
-    return unless (keys(%cachedblockers) > 0);
+    my $courseurl = &courseid_to_courseurl($env{'request.course.id'});
+    if ($env{'request.course.sec'}) {
+        $courseurl .= '/'.$env{'request.course.sec'};
+    }
+    return if ($env{'user.priv.'.$env{'request.role'}.'.'.$courseurl} =~/evb\&([^\:]*)/);
+    my %blockinfo;
+    if (ref($blocks) eq 'HASH') {
+        %blockinfo = &get_commblock_resources($blocks);
+    } else {
+        &load_all_blockers($env{'user.name'},$env{'user.domain'});
+        %blockinfo = %cachedblockers;
+    }
+    return unless (keys(%blockinfo) > 0);
     my (%possibles,@symbs);
     if (!$symb) {
-        $symb = &symbread($uri,1,1,1,\%possibles);
+        $symb = &symbread($uri,1,1,1,\%possibles,$ignoresymbdb,$noenccheck);
     }
     if ($symb) {
         @symbs = ($symb);
@@ -8550,34 +9402,38 @@ sub has_comm_blocking {
     foreach my $symb (@symbs) {
         last if ($noblock);
         my ($map,$resid,$resurl)=&decode_symb($symb);
-        foreach my $block (keys(%cachedblockers)) {
+        foreach my $block (keys(%blockinfo)) {
             if ($block =~ /^firstaccess____(.+)$/) {
                 my $item = $1;
-                if (($item eq $map) || ($item eq $symb)) {
-                    $noblock = 1;
-                    last;
+                unless ($blocked) {
+                    if (($item eq $map) || ($item eq $symb)) {
+                        $noblock = 1;
+                        last;
+                    }
                 }
             }
-            if (ref($cachedblockers{$block}) eq 'HASH') {
-                if (ref($cachedblockers{$block}{'resources'}) eq 'HASH') {
-                    if ($cachedblockers{$block}{'resources'}{$symb}) {
+            if (ref($blockinfo{$block}) eq 'HASH') {
+                if (ref($blockinfo{$block}{'resources'}) eq 'HASH') {
+                    if ($blockinfo{$block}{'resources'}{$symb}) {
                         unless (grep(/^\Q$block\E$/,@blockers)) {
                             push(@blockers,$block);
                         }
                     }
                 }
-            }
-            if (ref($cachedblockers{$block}{'maps'}) eq 'HASH') {
-                if ($cachedblockers{$block}{'maps'}{$map}) {
-                    unless (grep(/^\Q$block\E$/,@blockers)) {
-                        push(@blockers,$block);
+                if (ref($blockinfo{$block}{'maps'}) eq 'HASH') {
+                    if ($blockinfo{$block}{'maps'}{$map}) {
+                        unless (grep(/^\Q$block\E$/,@blockers)) {
+                            push(@blockers,$block);
+                        }
                     }
                 }
             }
         }
     }
-    return if ($noblock);
-    return @blockers;
+    unless ($noblock) { 
+        return @blockers;
+    }
+    return;
 }
 }
 
@@ -8599,29 +9455,9 @@ sub deeplink_check {
         @symbs = keys(%possibles);
     }
 
-    my ($login,$switchrole,$allow);
-    if ($env{'request.deeplink.login'} =~ m{^\Q/tiny/$cdom/\E(\w+)$}) {
-        my $key = $1;
-        my $tinyurl;
-        my ($result,$cached)=&Apache::lonnet::is_cached_new('tiny',$cdom."\0".$key);
-        if (defined($cached)) {
-             $tinyurl = $result;
-        } else {
-             my $configuname = &Apache::lonnet::get_domainconfiguser($cdom);
-             my %currtiny = &Apache::lonnet::get('tiny',[$key],$cdom,$configuname);
-             if ($currtiny{$key} ne '') {
-                 $tinyurl = $currtiny{$key};
-                 &Apache::lonnet::do_cache_new('tiny',$cdom."\0".$key,$currtiny{$key},600);
-             }
-        }
-        if ($tinyurl ne '') {
-            my ($cnumreq,$posslogin) = split(/\&/,$tinyurl);
-            if ($cnumreq eq $cnum) {
-                $login = $posslogin;
-            } else {
-                $switchrole = 1;
-            }
-        }
+    my ($deeplink_symb,$allow);
+    if ($env{'request.deeplink.login'}) {
+        $deeplink_symb = &Apache::loncommon::deeplink_login_symb($cnum,$cdom);
     }
     foreach my $symb (@symbs) {
         last if ($allow);
@@ -8629,34 +9465,48 @@ sub deeplink_check {
         if ($deeplink eq '') {
             $allow = 1;
         } else {
-            my ($listed,$scope,$access) = split(/,/,$deeplink);
-            if ($access eq 'any') {
+            my ($state,$others,$listed,$scope,$protect) = split(/,/,$deeplink);
+            if ($state ne 'only') {
                 $allow = 1;
-            } elsif ($login) {
-                if ($access eq 'only') {
-                    if ($scope eq 'res') {
-                        if ($symb eq $login) {
-                            $allow = 1;
+            } else {
+                my $check_deeplink_entry;
+                if ($protect ne 'none') {
+                    my ($acctype,$item) = split(/:/,$protect);
+                    if (($acctype eq 'ltic') && ($env{'user.linkprotector'})) {
+                        if (grep(/^\Q$item\Ec$/,split(/,/,$env{'user.linkprotector'}))) {
+                            $check_deeplink_entry = 1
                         }
-                    } elsif ($scope eq 'map') {
-#FIXME Compare map for $env{'request.deeplink.login'} with map for $symb
-                    } elsif ($scope eq 'rec') {
-#FIXME Recurse up for $env{'request.deeplink.login'} with map for $symb
-                    }
-                } else {
-                    my ($acctype,$item) = split(/:/,$access);
-                    if (($acctype eq 'lti') && ($env{'user.linkprotector'})) {
-                        if (grep(/^\Q$item\E$/,split(/,/,$env{'user.linkprotector'}))) {
-                            my %tinyurls = &get('tiny',[$symb],$cdom,$cnum);
-                            if (grep(/\Q$tinyurls{$symb}\E$/,split(/,/,$env{'user.linkproturis'}))) {
-                                $allow = 1;
-                            }
+                    } elsif (($acctype eq 'ltid') && ($env{'user.linkprotector'})) {
+                        if (grep(/^\Q$item\Ed$/,split(/,/,$env{'user.linkprotector'}))) {
+                            $check_deeplink_entry = 1;
                         }
                     } elsif (($acctype eq 'key') && ($env{'user.deeplinkkey'})) {
                         if (grep(/^\Q$item\E$/,split(/,/,$env{'user.deeplinkkey'}))) {
-                            my %tinyurls = &get('tiny',[$symb],$cdom,$cnum);
-                            if (grep(/\Q$tinyurls{$symb}\E$/,split(/,/,$env{'user.keyedlinkuri'}))) {
+                            $check_deeplink_entry = 1;
+                        }
+                    }
+                }
+                if (($protect eq 'none') || ($check_deeplink_entry)) {
+                    if ($scope eq 'res') {
+                        if ($symb eq $deeplink_symb) {
+                            $allow = 1;
+                        }
+                    } elsif (($scope eq 'map') || ($scope eq 'rec')) {
+                        my ($map_from_symb,$map_from_login);
+                        $map_from_symb = &deversion((&decode_symb($symb))[0]);
+                        if ($deeplink_symb =~ /\.(page|sequence)$/) {
+                            $map_from_login = &deversion((&decode_symb($deeplink_symb))[2]);
+                        } else {
+                            $map_from_login = &deversion((&decode_symb($deeplink_symb))[0]);
+                        }
+                        if (($map_from_symb) && ($map_from_login)) {
+                            if ($map_from_symb eq $map_from_login) {
                                 $allow = 1;
+                            } elsif ($scope eq 'rec') {
+                                my @recurseup = &get_map_hierarchy($map_from_symb,$env{'request.course.id'});
+                                if (grep(/^\Q$map_from_login\E$/,@recurseup)) {
+                                    $allow = 1;
+                                }
                             }
                         }
                     }
@@ -8929,7 +9779,7 @@ sub fetch_enrollment_query {
 }
 
 sub get_query_reply {
-    my ($queryid,$sleep,$loopmax) = @_;;
+    my ($queryid,$sleep,$loopmax) = @_;
     if (($sleep eq '') || ($sleep !~ /^\d+\.?\d*$/)) {
         $sleep = 0.2;
     }
@@ -9062,6 +9912,25 @@ sub auto_validate_instcode {
     return ($outcome,$description,$defaultcredits);
 }
 
+sub auto_validate_inst_crosslist {
+    my ($cnum,$cdom,$instcode,$inst_xlist,$coowner) = @_;
+    my ($homeserver,$response);
+    if (($cdom =~ /^$match_domain$/) && ($cnum =~ /^$match_courseid$/)) {
+        $homeserver = &homeserver($cnum,$cdom);
+    }
+    if (!defined($homeserver)) {
+        if ($cdom =~ /^$match_domain$/) {
+            $homeserver = &domain($cdom,'primary');
+        }
+    }
+    unless (($homeserver eq '') || ($homeserver eq 'no_host')) {
+        $response=&reply('autovalidateinstcrosslist:'.$cdom.':'.
+                         &escape($instcode).':'.&escape($inst_xlist).':'.
+                         &escape($coowner),$homeserver);
+    }
+    return $response;
+}
+
 sub auto_create_password {
     my ($cnum,$cdom,$authparam,$udom) = @_;
     my ($homeserver,$response);
@@ -9333,6 +10202,38 @@ sub auto_validate_class_sec {
     return $response;
 }
 
+sub auto_instsec_reformat {
+    my ($cdom,$action,$instsecref) = @_;
+    return unless(($action eq 'clutter') || ($action eq 'declutter'));
+    my @homeservers;
+    if (defined(&domain($cdom,'primary'))) {
+        push(@homeservers,&domain($cdom,'primary'));
+    } else {
+        my %servers = &get_servers($cdom,'library');
+        foreach my $tryserver (keys(%servers)) {
+            if (!grep(/^\Q$tryserver\E$/,@homeservers)) {
+                push(@homeservers,$tryserver);
+            }
+        }
+    }
+    my $response;
+    my %reformatted = %{$instsecref};
+    foreach my $server (@homeservers) {
+        if (ref($instsecref) eq 'HASH') {
+            my $info = &freeze_escape($instsecref);
+            my $response=&reply('autoinstsecreformat:'.$cdom.':'.
+                                $action.':'.$info,$server);
+            next if ($response =~ /(con_lost|error|no_such_host|refused|unknown_command)/);
+            my @items = split(/&/,$response);
+            foreach my $item (@items) {
+                my ($key,$value) = split(/=/,$item);
+                $reformatted{&unescape($key)} = &thaw_unescape($value);
+            }
+        }
+    }
+    return %reformatted;
+}
+
 sub auto_validate_instclasses {
     my ($cdom,$cnum,$owners,$classesref) = @_;
     my ($homeserver,%validations);
@@ -9534,11 +10435,13 @@ sub toggle_coursegroup_status {
 }
 
 sub modify_group_roles {
-    my ($cdom,$cnum,$group_id,$user,$end,$start,$userprivs,$selfenroll,$context) = @_;
+    my ($cdom,$cnum,$group_id,$user,$end,$start,$userprivs,$selfenroll,$context,
+        $othdomby,$requester) = @_;
     my $url = '/'.$cdom.'/'.$cnum.'/'.$group_id;
     my $role = 'gr/'.&escape($userprivs);
     my ($uname,$udom) = split(/:/,$user);
-    my $result = &assignrole($udom,$uname,$url,$role,$end,$start,'',$selfenroll,$context);
+    my $result = &assignrole($udom,$uname,$url,$role,$end,$start,'',$selfenroll,$context,
+                             $othdomby,$requester);
     if ($result eq 'ok') {
         &devalidate_getgroups_cache($udom,$uname,$cdom,$cnum);
     }
@@ -9666,43 +10569,66 @@ sub plaintext {
 
 sub assignrole {
     my ($udom,$uname,$url,$role,$end,$start,$deleteflag,$selfenroll,
-        $context)=@_;
+        $context,$othdomby,$requester,$reqsec,$reqrole)=@_;
     my $mrole;
     if ($role =~ /^cr\//) {
         my $cwosec=$url;
         $cwosec=~s/^\/($match_domain)\/($match_courseid)\/.*/$1\/$2/;
-	unless (&allowed('ccr',$cwosec)) {
-           my $refused = 1;
-           if ($context eq 'requestcourses') {
-               if (($env{'user.name'} ne '') && ($env{'user.domain'} ne '')) {
-                   if ($role =~ m{^cr/($match_domain)/($match_username)/([^/]+)$}) {
-                       if (($1 eq $env{'user.domain'}) && ($2 eq $env{'user.name'})) {
-                           my ($cdom,$cnum) = ($cwosec =~ m{^/?($match_domain)/($match_courseid)$});
-                           my %crsenv = &userenvironment($cdom,$cnum,('internal.courseowner'));
-                           if ($crsenv{'internal.courseowner'} eq
-                               $env{'user.name'}.':'.$env{'user.domain'}) {
-                               $refused = '';
-                           }
-                       }
-                   }
-               }
-           }
-           if ($refused) {
-               &logthis('Refused custom assignrole: '.
-                        $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.
-                        ' by '.$env{'user.name'}.' at '.$env{'user.domain'});
-               return 'refused';
-           }
+        if ((!&allowed('ccr',$cwosec)) && (!&allowed('ccr',$udom))) {
+            my $refused = 1;
+            if ($context eq 'requestcourses') {
+                if (($env{'user.name'} ne '') && ($env{'user.domain'} ne '')) {
+                    if ($role =~ m{^cr/($match_domain)/($match_username)/([^/]+)$}) {
+                        if (($1 eq $env{'user.domain'}) && ($2 eq $env{'user.name'})) {
+                            my ($cdom,$cnum) = ($cwosec =~ m{^/?($match_domain)/($match_courseid)$});
+                            my %crsenv = &userenvironment($cdom,$cnum,('internal.courseowner'));
+                            if ($crsenv{'internal.courseowner'} eq
+                                $env{'user.name'}.':'.$env{'user.domain'}) {
+                                $refused = '';
+                            }
+                        }
+                    }
+                }
+            } elsif (($context eq 'course') && ($othdomby eq 'othdombyuser')) {
+                my ($cdom,$cnum) = ($cwosec =~ m{^/?($match_domain)/($match_courseid)$});
+                my ($sec) = ($url =~ m{^/\Q$cwosec\E/(.*)$});
+                my $key = "$uname:$udom:$role:$sec";
+                my %queuedrolereq = &Apache::lonnet::get('nohist_othdomqueued',[$key],$cdom,$cnum);
+                if ((exists($queuedrolereq{$key})) && (ref($queuedrolereq{$key}) eq 'HASH')) {
+                    if (($queuedrolereq{$key}{'adj'} eq 'user') && ($queuedrolereq{$key}{'requester'} eq $requester)) {
+                        $refused = '';
+                    }
+                }
+            }
+            if ($refused) {
+                &logthis('Refused custom assignrole: '.
+                         $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.
+                         ' by '.$env{'user.name'}.' at '.$env{'user.domain'});
+                return 'refused';
+            }
         }
         $mrole='cr';
     } elsif ($role =~ /^gr\//) {
         my $cwogrp=$url;
         $cwogrp=~s{^/($match_domain)/($match_courseid)/.*}{$1/$2};
-        unless (&allowed('mdg',$cwogrp)) {
-            &logthis('Refused group assignrole: '.
-              $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
-                    $env{'user.name'}.' at '.$env{'user.domain'});
-            return 'refused';
+        if (!&allowed('mdg',$cwogrp)) {
+            my $refused = 1;
+            if (($refused) && ($othdomby eq 'othdombyuser') && ($requester ne '') && ($reqrole ne '')) {
+                my ($cdom,$cnum) = ($cwogrp =~ m{^/?($match_domain)/($match_courseid)$});
+                my $key = "$uname:$udom:$reqrole:$reqsec";
+                my %queuedrolereq = &Apache::lonnet::get('nohist_othdomqueued',[$key],$cdom,$cnum);
+                if ((exists($queuedrolereq{$key})) && (ref($queuedrolereq{$key}) eq 'HASH')) {
+                    if (($queuedrolereq{$key}{'adj'} eq 'user') && ($queuedrolereq{$key}{'requester'} eq $requester)) {
+                        $refused = '';
+                    }
+                }
+            }
+            if ($refused) {
+                &logthis('Refused group assignrole: '.
+                         $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
+                         $env{'user.name'}.' at '.$env{'user.domain'});
+                return 'refused';
+            }
         }
         $mrole='gr';
     } else {
@@ -9719,7 +10645,8 @@ sub assignrole {
             }
             if ($refused) {
                 my ($cdom,$cnum) = ($cwosec =~ m{^/?($match_domain)/($match_courseid)$});
-                if (!$selfenroll && (($context eq 'course') || ($context eq 'ltienroll' && $env{'request.lti.login'}))) {
+                if (!$selfenroll && ($othdomby ne 'othdombyuser') &&
+                   (($context eq 'course') || ($context eq 'ltienroll' && $env{'request.lti.login'}))) {
                     my %crsenv;
                     if ($role eq 'cc' || $role eq 'co') {
                         %crsenv = &userenvironment($cdom,$cnum,('internal.courseowner'));
@@ -9745,6 +10672,49 @@ sub assignrole {
                     } elsif (($context eq 'ltienroll') && ($env{'request.lti.login'})) {
                         $refused = '';
                     }
+                } elsif ($othdomby eq 'othdombyuser') {
+                    my ($key,%queuedrolereq);
+                    if ($context eq 'course') {
+                        my ($sec) = ($url =~ m{^/\Q$cwosec\E/(.*)$});
+                        $key = "$uname:$udom:$role:$sec";
+                        %queuedrolereq = &Apache::lonnet::get('nohist_othdomqueued',[$key],$cdom,$cnum);
+                        if ((exists($queuedrolereq{$key})) && (ref($queuedrolereq{$key}) eq 'HASH')) {
+                            if (($queuedrolereq{$key}{'adj'} eq 'user') && ($queuedrolereq{$key}{'requester'} eq $requester)) {
+                                if ((($role eq 'cc') && ($cnum !~ /^$match_community$/)) || 
+                                    (($role eq 'co') && ($cnum =~ /^$match_community$/))) {
+                                    my %crsenv = &userenvironment($cdom,$cnum,('internal.courseowner'));
+                                    if ($crsenv{'internal.courseowner'} eq $requester) {
+                                        $refused = '';
+                                    }
+                                } elsif ($role =~ /^(?:in|ta|ep|st)$/) {
+                                    $refused = '';
+                                }
+                            }
+                        }
+                    } elsif (($context eq 'author') && ($role =~ /^ca|aa$/)) {
+                        my $key = "$uname:$udom:$role"; 
+                        my ($audom,$auname) = ($url =~ m{^/($match_domain)/($match_username)$});
+                        if (($audom ne '') && ($auname ne '')) {
+                            my %queuedrolereq = &Apache::lonnet::get('nohist_othdomqueued',[$key],$audom,$auname);
+                            if ((exists($queuedrolereq{$key})) && (ref($queuedrolereq{$key}) eq 'HASH')) {
+                                if (($queuedrolereq{$key}{'adj'} eq 'user') && ($queuedrolereq{$key}{'requester'} eq $requester)) {
+                                    $refused = '';
+                                }
+                            }
+                        }
+                    } elsif (($context eq 'domain') && ($role ne 'dc') && ($role ne 'su')) {
+                        my $key = "$uname:$udom:$role";
+                        my ($roledom) = ($url =~ m{^/($match_domain)/\Q$role\E$});
+                        if ($roledom ne '') {
+                            my $confname = $roledom.'-domainconfig';
+                            my %queuedrolereq = &Apache::lonnet::get('nohist_othdomqueued',[$key],$roledom,$confname);
+                            if ((exists($queuedrolereq{$key})) && (ref($queuedrolereq{$key}) eq 'HASH')) {
+                                if (($queuedrolereq{$key}{'adj'} eq 'user') && ($queuedrolereq{$key}{'requester'} eq $requester)) {
+                                    $refused = '';
+                                }
+                            }
+                        }
+                    }
                 } elsif ($context eq 'requestcourses') {
                     my @possroles = ('st','ta','ep','in','cc','co');
                     if ((grep(/^\Q$role\E$/,@possroles)) && ($env{'user.name'} ne '' && $env{'user.domain'} ne '')) {
@@ -9857,15 +10827,15 @@ sub assignrole {
                                                  $origstart,$selfenroll,$context);
             }
             &courserolelog($role,$uname,$udom,$url,$origstart,$origend,$delflag,
-                           $selfenroll,$context);
+                           $selfenroll,$context,$othdomby,$requester);
         } elsif (($role eq 'li') || ($role eq 'dg') || ($role eq 'sc') ||
                  ($role eq 'au') || ($role eq 'dc') || ($role eq 'dh') ||
                  ($role eq 'da')) {
             &domainrolelog($role,$uname,$udom,$url,$origstart,$origend,$delflag,
-                           $context);
+                           $context,$othdomby,$requester);
         } elsif (($role eq 'ca') || ($role eq 'aa')) {
             &coauthorrolelog($role,$uname,$udom,$url,$origstart,$origend,$delflag,
-                             $context); 
+                             $context,$othdomby,$requester); 
         }
         if ($role eq 'cc') {
             &autoupdate_coowners($url,$end,$start,$uname,$udom);
@@ -9883,11 +10853,23 @@ sub autoupdate_coowners {
         if ($domdesign{$cdom.'.autoassign.co-owners'}) {
             my %coursehash = &coursedescription($cdom.'_'.$cnum);
             my $instcode = $coursehash{'internal.coursecode'};
+            my $xlists = $coursehash{'internal.crosslistings'};
             if ($instcode ne '') {
                 if (($start && $start <= $now) && ($end == 0) || ($end > $now)) {
                     unless ($coursehash{'internal.courseowner'} eq $uname.':'.$udom) {
                         my ($delcoowners,@newcoowners,$putresult,$delresult,$coowners);
                         my ($result,$desc) = &auto_validate_instcode($cnum,$cdom,$instcode,$uname.':'.$udom);
+                        unless ($result eq 'valid') {
+                            if ($xlists ne '') {
+                                foreach my $xlist (split(',',$xlists)) {
+                                    my ($inst_crosslist,$lcsec) = split(':',$xlist);
+                                    $result =
+                                        &auto_validate_inst_crosslist($cnum,$cdom,$instcode,
+                                                                      $inst_crosslist,$uname.':'.$udom);
+                                    last if ($result eq 'valid');
+                                }
+                            }
+                        }
                         if ($result eq 'valid') {
                             if ($coursehash{'internal.co-owners'}) {
                                 foreach my $coowner (split(',',$coursehash{'internal.co-owners'})) {
@@ -9900,18 +10882,16 @@ sub autoupdate_coowners {
                             } else {
                                 push(@newcoowners,$uname.':'.$udom);
                             }
-                        } else {
-                            if ($coursehash{'internal.co-owners'}) {
-                                foreach my $coowner (split(',',$coursehash{'internal.co-owners'})) {
-                                    unless ($coowner eq $uname.':'.$udom) {
-                                        push(@newcoowners,$coowner);
-                                    }
-                                }
-                                unless (@newcoowners > 0) {
-                                    $delcoowners = 1;
-                                    $coowners = '';
+                        } elsif ($coursehash{'internal.co-owners'}) {
+                            foreach my $coowner (split(',',$coursehash{'internal.co-owners'})) {
+                                unless ($coowner eq $uname.':'.$udom) {
+                                    push(@newcoowners,$coowner);
                                 }
                             }
+                            unless (@newcoowners > 0) {
+                                $delcoowners = 1;
+                                $coowners = '';
+                            }
                         }
                         if (@newcoowners || $delcoowners) {
                             &store_coowners($cdom,$cnum,$coursehash{'home'},
@@ -9950,10 +10930,10 @@ sub store_coowners {
     }
     if (($putresult eq 'ok') || ($delresult eq 'ok')) {
         my %crsinfo =
-            &Apache::lonnet::courseiddump($cdom,'.',1,'.','.',$cnum,undef,undef,'.');
+            &courseiddump($cdom,'.',1,'.','.',$cnum,undef,undef,'.');
         if (ref($crsinfo{$cid}) eq 'HASH') {
             $crsinfo{$cid}{'co-owners'} = \@newcoowners;
-            my $cidput = &Apache::lonnet::courseidput($cdom,\%crsinfo,$chome,'notime');
+            my $cidput = &courseidput($cdom,\%crsinfo,$chome,'notime');
         }
     }
 }
@@ -9964,19 +10944,35 @@ sub store_coowners {
 sub modifyuserauth {
     my ($udom,$uname,$umode,$upass)=@_;
     my $uhome=&homeserver($uname,$udom);
-    unless (&allowed('mau',$udom)) { return 'refused'; }
+    my $allowed;
+    if (&allowed('mau',$udom)) {
+        $allowed = 1;
+    } elsif (($umode eq 'internal') && ($udom eq $env{'user.domain'}) &&
+             ($env{'request.course.id'}) && (&allowed('mip',$env{'request.course.id'})) &&
+             (!$env{'course.'.$env{'request.course.id'}.'.internal.nopasswdchg'})) {
+        my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
+        my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
+        if (($cdom ne '') && ($cnum ne '')) {
+            my $is_owner = &is_course_owner($cdom,$cnum);
+            if ($is_owner) {
+                $allowed = 1;
+            }
+        }
+    }
+    unless ($allowed) { return 'refused'; }
     &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
              $umode.' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
              ' in domain '.$env{'request.role.domain'});  
     my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
 		     &escape($upass),$uhome);
+    my $ip = &get_requestor_ip();
     &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},
         'Authentication changed for '.$udom.', '.$uname.', '.$umode.
-         '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
+         '(Remote '.$ip.'): '.$reply);
     &log($udom,,$uname,$uhome,
         'Authentication changed by '.$env{'user.domain'}.', '.
                                      $env{'user.name'}.', '.$umode.
-         '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
+         '(Remote '.$ip.'): '.$reply);
     unless ($reply eq 'ok') {
         &logthis('Authentication mode error: '.$reply);
 	return 'error: '.$reply;
@@ -10155,7 +11151,7 @@ sub modifyuser {
         return 'error: '.$reply;
     }
     if ($names{'permanentemail'} ne $oldnames{'permanentemail'}) {
-        &Apache::lonnet::devalidate_cache_new('emailscache',$uname.':'.$udom);
+        &devalidate_cache_new('emailscache',$uname.':'.$udom);
     }
     my $sqlresult = &update_allusers_table($uname,$udom,\%names);
     &devalidate_cache_new('namescache',$uname.':'.$udom);
@@ -10191,7 +11187,7 @@ sub modifystudent {
 
 sub modify_student_enrollment {
     my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start,$type,
-        $locktype,$cid,$selfenroll,$context,$credits,$instsec) = @_;
+        $locktype,$cid,$selfenroll,$context,$credits,$instsec,$othdomby,$requester) = @_;
     my ($cdom,$cnum,$chome);
     if (!$cid) {
 	unless ($cid=$env{'request.course.id'}) {
@@ -10235,7 +11231,7 @@ sub modify_student_enrollment {
     }
     my $fullname = &format_name($first,$middle,$last,$gene,'lastname');
     my $user = "$uname:$udom";
-    my %old_entry = &Apache::lonnet::get('classlist',[$user],$cdom,$cnum);
+    my %old_entry = &get('classlist',[$user],$cdom,$cnum);
     my $reply=cput('classlist',
 		   {$user => 
 			join(':',$end,$start,$uid,$usec,$fullname,$type,$locktype,$credits,$instsec) },
@@ -10252,7 +11248,7 @@ sub modify_student_enrollment {
 	$uurl.='/'.$usec;
     }
     my $result = &assignrole($udom,$uname,$uurl,'st',$end,$start,undef,
-                             $selfenroll,$context);
+                             $selfenroll,$context,$othdomby,$requester);
     if ($result ne 'ok') {
         if ($old_entry{$user} ne '') {
             $reply = &cput('classlist',\%old_entry,$cdom,$cnum);
@@ -10305,14 +11301,19 @@ sub writecoursepref {
 
 sub createcourse {
     my ($udom,$description,$url,$course_server,$nonstandard,$inst_code,
-        $course_owner,$crstype,$cnum,$context,$category)=@_;
+        $course_owner,$crstype,$cnum,$context,$category,$callercontext)=@_;
     $url=&declutter($url);
     my $cid='';
     if ($context eq 'requestcourses') {
         my $can_create = 0;
         my ($ownername,$ownerdom) = split(':',$course_owner);
         if ($udom eq $ownerdom) {
-            if (&usertools_access($ownername,$ownerdom,$category,undef,
+            my $reload;
+            if (($callercontext eq 'auto') &&
+               ($ownerdom eq $env{'user.domain'}) && ($ownername eq $env{'user.name'})) {
+                $reload = 'reload';
+            }
+            if (&usertools_access($ownername,$ownerdom,$category,$reload,
                                   $context)) {
                 $can_create = 1;
             }
@@ -10364,7 +11365,7 @@ sub createcourse {
         }
     }
     my %host_servers =
-        &Apache::lonnet::get_servers($udom,'library');
+        &get_servers($udom,'library');
     unless ($host_servers{$course_server}) {
         return 'error: invalid home server for course: '.$course_server;
     }
@@ -10497,7 +11498,7 @@ sub store_userdata {
             if (($uhome eq '') || ($uhome eq 'no_host')) {
                 $result = 'error: no_host';
             } else {
-                $storehash->{'ip'} = $ENV{'REMOTE_ADDR'};
+                $storehash->{'ip'} = &get_requestor_ip();
                 $storehash->{'host'} = $perlvar{'lonHostID'};
 
                 my $namevalue='';
@@ -10523,9 +11524,11 @@ sub store_userdata {
 # ---------------------------------------------------------- Assign Custom Role
 
 sub assigncustomrole {
-    my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag,$selfenroll,$context)=@_;
+    my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag,
+        $selfenroll,$context,$othdomby,$requester)=@_;
     return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
-                       $end,$start,$deleteflag,$selfenroll,$context);
+                       $end,$start,$deleteflag,$selfenroll,$context,$othdomby,
+                       $requester);
 }
 
 # ----------------------------------------------------------------- Revoke Role
@@ -11332,14 +12335,20 @@ sub stat_file {
 # or corresponding Published Resource Space, and populate the hash ref:
 # $dirhashref with URLs of all directories, and if $filehashref hash
 # ref arg is provided, the URLs of any files, excluding versioned, .meta,
-# or .rights files in resource space, and .meta, .save, .log, and .bak
-# files in Authoring Space.
+# or .rights files in resource space, and .meta, .save, .log, .bak and
+# .rights files in Authoring Space.
 #
 # Inputs:
 #
 # $is_home - true if current server is home server for user's space
-# $context - either: priv, or res respectively for Authoring or Resource Space.
-# $docroot - Document root (i.e., /home/httpd/html
+# $recurse - if true will also traverse subdirectories recursively
+# $include - reference to hash containing allowed file extensions.  If provided,
+#             files which do not have a matching extension will be ignored.
+# $exclude - reference to hash containing excluded file extensions.  If provided,
+#             files which have a matching extension will be ignored.
+# $nonemptydir - if true, will only populate $fileshashref hash entry for a particular
+#             directory with first file found (with acceptable extension).
+# $addtopdir - if true, set $dirhashref->{'/'} = 1 
 # $toppath - Top level directory (i.e., /res/$dom/$uname or /priv/$dom/$uname
 # $relpath - Current path (relative to top level).
 # $dirhashref - reference to hash to populate with URLs of directories (Required)
@@ -11356,39 +12365,61 @@ sub stat_file {
 #
 
 sub recursedirs {
-    my ($is_home,$context,$docroot,$toppath,$relpath,$dirhashref,$filehashref) = @_;
+    my ($is_home,$recurse,$include,$exclude,$nonemptydir,$addtopdir,$toppath,$relpath,$dirhashref,$filehashref) = @_;
     return unless (ref($dirhashref) eq 'HASH');
+    my $docroot = $perlvar{'lonDocRoot'};
     my $currpath = $docroot.$toppath;
-    if ($relpath) {
+    if ($relpath ne '') {
         $currpath .= "/$relpath";
     }
-    my $savefile;
+    my ($savefile,$checkinc,$checkexc);
     if (ref($filehashref)) {
         $savefile = 1;
     }
+    if (ref($include) eq 'HASH') {
+        $checkinc = 1;
+    }
+    if (ref($exclude) eq 'HASH') {
+        $checkexc = 1;
+    }
     if ($is_home) {
-        if (opendir(my $dirh,$currpath)) {
+        if ((-e $currpath) && (opendir(my $dirh,$currpath))) {
+            my $filecount = 0;
             foreach my $item (sort { lc($a) cmp lc($b) } grep(!/^\.+$/,readdir($dirh))) {
                 next if ($item eq '');
                 if (-d "$currpath/$item") {
                     my $newpath;
-                    if ($relpath) {
+                    if ($relpath ne '') {
                         $newpath = "$relpath/$item";
                     } else {
                         $newpath = $item;
                     }
                     $dirhashref->{&Apache::lonlocal::js_escape($newpath)} = 1;
-                    &recursedirs($is_home,$context,$docroot,$toppath,$newpath,$dirhashref,$filehashref);
-                } elsif ($savefile) {
-                    if ($context eq 'priv') {
-                        unless ($item =~ /\.(meta|save|log|bak|DS_Store)$/) {
-                            $filehashref->{&Apache::lonlocal::js_escape($relpath)}{$item} = 1;
+                    if ($recurse) {
+                        &recursedirs($is_home,$recurse,$include,$exclude,$nonemptydir,$addtopdir,$toppath,$newpath,$dirhashref,$filehashref);
+                    }
+                } elsif (($savefile) || ($relpath eq '')) {
+                    next if ($nonemptydir && $filecount);
+                    if ($checkinc || $checkexc) {
+                        my ($extension) = ($item =~ /\.(\w+)$/);
+                        if ($checkinc) {
+                            next unless ($extension && $include->{$extension});
                         }
-                    } else {
-                        unless (($item =~ /\.meta$/) || ($item =~ /\.\d+\.\w+$/) || ($item =~ /\.rights$/)) {
+                        if ($checkexc) {
+                            next if ($extension && $exclude->{$extension});
+                        }
+                    }
+                    if (($relpath eq '') && (!exists($dirhashref->{'/'}))) {
+                        $dirhashref->{'/'} = 1;
+                    }
+                    if ($savefile) {
+                        if ($relpath eq '') {
+                            $filehashref->{'/'}{$item} = 1;
+                        } else {
                             $filehashref->{&Apache::lonlocal::js_escape($relpath)}{$item} = 1;
                         }
                     }
+                    $filecount ++;
                 }
             }
             closedir($dirh);
@@ -11399,6 +12430,7 @@ sub recursedirs {
         my @dir_lines;
         my $dirptr=16384;
         if (ref($dirlistref) eq 'ARRAY') {
+            my $filecount = 0;
             foreach my $dir_line (sort
                               {
                                   my ($afile)=split('&',$a,2);
@@ -11414,28 +12446,57 @@ sub recursedirs {
                     if ($relpath) {
                         $newpath = "$relpath/$item";
                     } else {
-                        $relpath = '/';
                         $newpath = $item;
                     }
                     $dirhashref->{&Apache::lonlocal::js_escape($newpath)} = 1;
-                    &recursedirs($is_home,$context,$docroot,$toppath,$newpath,$dirhashref,$filehashref);
-                } elsif ($savefile) {
-                    if ($context eq 'priv') {
-                        unless ($item =~ /\.(meta|save|log|bak|DS_Store)$/) {
-                            $filehashref->{$relpath}{$item} = 1;
+                    if ($recurse) {
+                        &recursedirs($is_home,$recurse,$include,$exclude,$nonemptydir,$addtopdir,$toppath,$newpath,$dirhashref,$filehashref);
+                    }
+                } elsif (($savefile) || ($relpath eq '')) {
+                    next if ($nonemptydir && $filecount);
+                    if ($checkinc || $checkexc) {
+                        my $extension;
+                        if ($checkinc) {
+                            next unless ($extension && $include->{$extension});
                         }
-                    } else {
-                        unless (($item =~ /\.meta$/) || ($item =~ /\.\d+\.\w+$/)) {
-                            $filehashref->{$relpath}{$item} = 1;
+                        if ($checkexc) {
+                            next if ($extension && $exclude->{$extension});
                         }
                     }
+                    if (($relpath eq '') && (!exists($dirhashref->{'/'}))) {
+                        $dirhashref->{'/'} = 1;
+                    }
+                    if ($savefile) {
+                        if ($relpath eq '') {
+                            $filehashref->{'/'}{$item} = 1;
+                        } else {
+                            $filehashref->{&Apache::lonlocal::js_escape($relpath)}{$item} = 1;
+                        }
+                    }
+                    $filecount ++; 
                 }
             }
         }
     }
+    if ($addtopdir) {
+        if (($relpath eq '') && (!exists($dirhashref->{'/'}))) {
+            $dirhashref->{'/'} = 1;
+        }
+    }
     return;
 }
 
+sub priv_exclude {
+    return {
+             meta => 1,
+             save => 1,
+             log => 1,
+             bak => 1,
+             rights => 1,
+             DS_Store => 1,
+           };
+}
+
 # -------------------------------------------------------- Value of a Condition
 
 # gets the value of a specific preevaluated condition
@@ -11649,15 +12710,22 @@ sub resdata {
 
 sub get_domain_lti {
     my ($cdom,$context) = @_;
-    my ($name,%lti);
+    my ($name,$cachename,%lti);
     if ($context eq 'consumer') {
         $name = 'ltitools';
     } elsif ($context eq 'provider') {
         $name = 'lti';
+    } elsif ($context eq 'linkprot') {
+        $name = 'ltisec';
     } else {
         return %lti;
     }
-    my ($result,$cached)=&is_cached_new($name,$cdom);
+    if ($context eq 'linkprot') {
+        $cachename = $context;
+    } else {
+        $cachename = $name;
+    }
+    my ($result,$cached)=&is_cached_new($cachename,$cdom);
     if (defined($cached)) {
         if (ref($result) eq 'HASH') {
             %lti = %{$result};
@@ -11665,43 +12733,218 @@ sub get_domain_lti {
     } else {
         my %domconfig = &get_dom('configuration',[$name],$cdom);
         if (ref($domconfig{$name}) eq 'HASH') {
-            %lti = %{$domconfig{$name}};
-            my %encdomconfig = &get_dom('encconfig',[$name],$cdom);
-            if (ref($encdomconfig{$name}) eq 'HASH') {
-                foreach my $id (keys(%lti)) {
-                    if (ref($encdomconfig{$name}{$id}) eq 'HASH') {
-                        foreach my $item ('key','secret') {
-                            $lti{$id}{$item} = $encdomconfig{$name}{$id}{$item};
-                        }
-                    }
+            if ($context eq 'linkprot') {
+                if (ref($domconfig{$name}{'linkprot'}) eq 'HASH') {
+                    %lti = %{$domconfig{$name}{'linkprot'}};
                 }
+            } else {
+                %lti = %{$domconfig{$name}};
             }
         }
         my $cachetime = 24*60*60;
-        &do_cache_new($name,$cdom,\%lti,$cachetime);
+        &do_cache_new($cachename,$cdom,\%lti,$cachetime);
+    }
+    return %lti;
+}
+
+sub get_course_lti {
+    my ($cnum,$cdom,$context) = @_;
+    my ($name,$cachename,%lti);
+    if ($context eq 'consumer') {
+        $name = 'ltitools';
+        $cachename = 'courseltitools';
+    } elsif ($context eq 'provider') {
+        $name = 'lti';
+        $cachename = 'courselti';
+    } else {
+        return %lti;
+    }
+    my $hashid=$cdom.'_'.$cnum;
+    my ($result,$cached)=&is_cached_new($cachename,$hashid);
+    if (defined($cached)) {
+        if (ref($result) eq 'HASH') {
+            %lti = %{$result};
+        }
+    } else {
+        %lti = &dump($name,$cdom,$cnum,undef,undef,undef,1);
+        my $cachetime = 24*60*60;
+        &do_cache_new($cachename,$hashid,\%lti,$cachetime);
     }
     return %lti;
 }
 
-sub get_numsuppfiles {
-    my ($cnum,$cdom,$ignorecache)=@_;
+sub courselti_itemid {
+    my ($cnum,$cdom,$url,$method,$params,$context) = @_;
+    my ($chome,$itemid);
+    $chome = &homeserver($cnum,$cdom);
+    return if ($chome eq 'no_host');
+    if (ref($params) eq 'HASH') {
+        my $rep;
+        if (grep { $_ eq $chome } current_machine_ids()) {
+            $rep = LONCAPA::Lond::crslti_itemid($cdom,$cnum,$url,$method,$params,$perlvar{'lonVersion'});
+        } else {
+            my $escurl = &escape($url);
+            my $escmethod = &escape($method);
+            my $items = &freeze_escape($params);
+            $rep = &reply("encrypt:lti:$cdom:$cnum:$context:$escurl:$escmethod:$items",$chome);
+        }
+        unless (($rep=~/^(refused|rejected|error)/) || ($rep eq 'con_lost') ||
+                ($rep eq 'unknown_cmd')) {
+            $itemid = $rep;
+        }
+    }
+    return $itemid;
+}
+
+sub domainlti_itemid {
+    my ($cdom,$url,$method,$params,$context) = @_;
+    my ($primary_id,$itemid);
+    $primary_id = &domain($cdom,'primary');
+    return if ($primary_id eq '');
+    if (ref($params) eq 'HASH') {
+        my $rep;
+        if (grep { $_ eq $primary_id } current_machine_ids()) {
+            $rep = LONCAPA::Lond::domlti_itemid($cdom,$context,$url,$method,$params,$perlvar{'lonVersion'});
+        } else {
+            my $cnum = '';
+            my $escurl = &escape($url);
+            my $escmethod = &escape($method);
+            my $items = &freeze_escape($params);
+            $rep = &reply("encrypt:lti:$cdom:$cnum:$context:$escurl:$escmethod:$items",$primary_id);
+        }
+        unless (($rep=~/^(refused|rejected|error)/) || ($rep eq 'con_lost') ||
+                ($rep eq 'unknown_cmd')) {
+            $itemid = $rep;
+        }
+    }
+    return $itemid;
+}
+
+sub get_ltitools_id {
+    my ($context,$cdom,$cnum,$title) = @_;
+    my ($lockhash,$tries,$gotlock,$id,$error);
+
+    # get lock on ltitools db
+    $lockhash = {
+                   lock => $env{'user.name'}.
+                           ':'.$env{'user.domain'},
+                };
+    $tries = 0;
+    if ($context eq 'domain') {
+        $gotlock = &newput_dom('ltitools',$lockhash,$cdom);
+    } else {
+        $gotlock = &newput('ltitools',$lockhash,$cdom,$cnum);
+    }
+    while (($gotlock ne 'ok') && ($tries<10)) {
+        $tries ++;
+        sleep (0.1);
+        if ($context eq 'domain') {
+            $gotlock = &newput_dom('ltitools',$lockhash,$cdom);
+        } else {
+            $gotlock = &newput('ltitools',$lockhash,$cdom,$cnum);
+        }
+    }
+    if ($gotlock eq 'ok') {
+        my %currids;
+        if ($context eq 'domain') {
+            %currids = &dump_dom('ltitools',$cdom);
+        } else {
+            %currids = &dump('ltitools',$cdom,$cnum);
+        }
+        if ($currids{'lock'}) {
+            delete($currids{'lock'});
+            if (keys(%currids)) {
+                my @curr = sort { $a <=> $b } keys(%currids);
+                if ($curr[-1] =~ /^\d+$/) {
+                    $id = 1 + $curr[-1];
+                }
+            } else {
+                $id = 1;
+            }
+            if ($id) {
+                if ($context eq 'domain') {
+                    unless (&newput_dom('ltitools',{ $id => $title },$cdom) eq 'ok') {
+                        $error = 'nostore';
+                    }
+                } else {
+                    unless (&newput('ltitools',{ $id => $title },$cdom,$cnum) eq 'ok') {
+                        $error = 'nostore';
+                    }
+                }
+            } else {
+                $error = 'nonumber';
+            }
+        }
+        my $dellockoutcome;
+        if ($context eq 'domain') {
+            $dellockoutcome = &del_dom('ltitools',['lock'],$cdom);
+        } else {
+            $dellockoutcome = &del('ltitools',['lock'],$cdom,$cnum);
+        }
+    } else {
+        $error = 'nolock';
+    }
+    return ($id,$error);
+}
+
+sub count_supptools {
+    my ($cnum,$cdom,$ignorecache,$reload)=@_;
     my $hashid=$cnum.':'.$cdom;
-    my ($suppcount,$cached);
+    my ($numexttools,$cached);
     unless ($ignorecache) {
-        ($suppcount,$cached) = &is_cached_new('suppcount',$hashid);
+        ($numexttools,$cached) = &is_cached_new('supptools',$hashid);
     }
     unless (defined($cached)) {
         my $chome=&homeserver($cnum,$cdom);
+        $numexttools = 0;
         unless ($chome eq 'no_host') {
-            ($suppcount,my $supptools,my $errors) = (0,0,0);
-            my $suppmap = 'supplemental.sequence';
-            ($suppcount,$supptools,$errors) =
-                &Apache::loncommon::recurse_supplemental($cnum,$cdom,$suppmap,$suppcount,
-                                                         $supptools,$errors);
+            my ($supplemental) = &Apache::loncommon::get_supplemental($cnum,$cdom,$reload);
+            if (ref($supplemental) eq 'HASH') {
+                if ((ref($supplemental->{'ids'}) eq 'HASH') && (ref($supplemental->{'hidden'}) eq 'HASH')) {
+                    foreach my $key (keys(%{$supplemental->{'ids'}})) {
+                        if ($key =~ m{^/adm/$cdom/$cnum/\d+/ext\.tool$}) {
+                            $numexttools ++;
+                        }
+                    }
+                }
+            }
         }
-        &do_cache_new('suppcount',$hashid,$suppcount,600);
+        &do_cache_new('supptools',$hashid,$numexttools,600);
     }
-    return $suppcount;
+    return $numexttools;
+}
+
+sub has_unhidden_suppfiles {
+    my ($cnum,$cdom,$ignorecache,$possdel)=@_;
+    my $hashid=$cnum.':'.$cdom;
+    my ($showsupp,$cached);
+    unless ($ignorecache) {
+        ($showsupp,$cached) = &is_cached_new('showsupp',$hashid);
+    }
+    unless (defined($cached)) {
+        my $chome=&homeserver($cnum,$cdom);
+        unless ($chome eq 'no_host') {
+            my ($supplemental) = &Apache::loncommon::get_supplemental($cnum,$cdom,$ignorecache,$possdel);
+            if (ref($supplemental) eq 'HASH') {
+                if ((ref($supplemental->{'ids'}) eq 'HASH') && (ref($supplemental->{'hidden'}) eq 'HASH')) {
+                    foreach my $key (keys(%{$supplemental->{'ids'}})) {
+                        next if ($key =~ /\.sequence$/);
+                        if (ref($supplemental->{'ids'}->{$key}) eq 'ARRAY') {
+                            foreach my $id (@{$supplemental->{'ids'}->{$key}}) {
+                                unless ($supplemental->{'hidden'}->{$id}) {
+                                    $showsupp = 1;
+                                    last;
+                                }
+                            }
+                        }
+                        last if ($showsupp);
+                    }
+                }
+            }
+        }
+        &do_cache_new('showsupp',$hashid,$showsupp,600);
+    }
+    return $showsupp;
 }
 
 #
@@ -11742,7 +12985,7 @@ sub EXT_cache_set {
 # --------------------------------------------------------- Value of a Variable
 sub EXT {
 
-    my ($varname,$symbparm,$udom,$uname,$usection,$recurse,$cid)=@_;
+    my ($varname,$symbparm,$udom,$uname,$usection,$recurse,$cid,$recurseupref)=@_;
     unless ($varname) { return ''; }
     #get real user name/domain, courseid and symb
     my $courseid;
@@ -11774,7 +13017,7 @@ sub EXT {
 	    if ( (defined($Apache::lonhomework::parsing_a_problem)
 		  || defined($Apache::lonhomework::parsing_a_task))
 		 &&
-		 ($symbparm eq &symbread()) ) {	
+		 ($symbparm eq &symbread()) ) {
 		# if we are in the middle of processing the resource the
 		# get the value we are planning on committing
                 if (defined($Apache::lonhomework::results{$qualifierrest})) {
@@ -11896,6 +13139,10 @@ sub EXT {
         }
 
 	my ($section, $group, @groups, @recurseup, $recursed);
+        if (ref($recurseupref) eq 'ARRAY') {
+            @recurseup = @{$recurseupref};
+            $recursed = 1;
+        }
 	my ($courselevelm,$courseleveli,$courselevel,$mapp);
         if (($courseid eq '') && ($cid)) {
             $courseid = $cid;
@@ -12044,6 +13291,10 @@ sub EXT {
 	if ($space eq 'name') {
 	    return $ENV{'SERVER_NAME'};
         }
+    } elsif ($realm eq 'client') {
+        if ($space eq 'remote_addr') {
+            return &get_requestor_ip();
+        }
     }
     return '';
 }
@@ -12769,13 +14020,13 @@ sub get_reservable_slots {
 sub get_course_slots {
     my ($cnum,$cdom) = @_;
     my $hashid=$cnum.':'.$cdom;
-    my ($result,$cached) = &Apache::lonnet::is_cached_new('allslots',$hashid);
+    my ($result,$cached) = &is_cached_new('allslots',$hashid);
     if (defined($cached)) {
         if (ref($result) eq 'HASH') {
             return %{$result};
         }
     } else {
-        my %slots=&Apache::lonnet::dump('slots',$cdom,$cnum);
+        my %slots=&dump('slots',$cdom,$cnum);
         my ($tmp) = keys(%slots);
         if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
             &do_cache_new('allslots',$hashid,\%slots,600);
@@ -12821,11 +14072,68 @@ sub get_coursechange {
 }
 
 sub devalidate_coursechange_cache {
-    my ($cnum,$cdom)=@_;
-    my $hashid=$cnum.':'.$cdom;
+    my ($cdom,$cnum)=@_;
+    my $hashid=$cdom.'_'.$cnum;
     &devalidate_cache_new('crschange',$hashid);
 }
 
+sub get_suppchange {
+    my ($cdom,$cnum) = @_;
+    if ($cdom eq '' || $cnum eq '') {
+        return unless ($env{'request.course.id'});
+        $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
+        $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
+    }
+    my $hashid=$cdom.'_'.$cnum;
+    my ($change,$cached)=&is_cached_new('suppchange',$hashid);
+    if ((defined($cached)) && ($change ne '')) {
+        return $change;
+    } else {
+        my %crshash = &get('environment',['internal.supplementalchange'],$cdom,$cnum);
+        if ($crshash{'internal.supplementalchange'} eq '') {
+            $change = $env{'course.'.$cdom.'_'.$cnum.'.internal.created'};
+            if ($change eq '') {
+                %crshash = &get('environment',['internal.created'],$cdom,$cnum);
+                $change = $crshash{'internal.created'};
+            }
+        } else {
+            $change = $crshash{'internal.supplementalchange'};
+        }
+        my $cachetime = 600;
+        &do_cache_new('suppchange',$hashid,$change,$cachetime);
+    }
+    return $change;
+}
+
+sub devalidate_suppchange_cache {
+    my ($cdom,$cnum)=@_;
+    my $hashid=$cdom.'_'.$cnum;
+    &devalidate_cache_new('suppchange',$hashid);
+}
+
+sub update_supp_caches {
+    my ($cdom,$cnum) = @_;
+    my %servers = &internet_dom_servers($cdom);
+    my @ids=&current_machine_ids();
+    foreach my $server (keys(%servers)) {
+        next if (grep(/^\Q$server\E$/,@ids));
+        my $hashid=$cnum.':'.$cdom;
+        my $cachekey = &escape('showsupp').':'.&escape($hashid);
+        &remote_devalidate_cache($server,[$cachekey]);
+    }
+    &has_unhidden_suppfiles($cnum,$cdom,1,1);
+    &count_supptools($cnum,$cdom,1);
+    my $now = time;
+    if ($env{'request.course.id'} eq $cdom.'_'.$cnum) {
+        &Apache::lonnet::appenv({'request.course.suppupdated' => $now});
+    }
+    &put('environment',{'internal.supplementalchange' => $now},
+         $cdom,$cnum);
+    &Apache::lonnet::appenv(
+        {'course.'.$cdom.'_'.$cnum.'.internal.supplementalchange' => $now});
+    &do_cache_new('suppchange',$cdom.'_'.$cnum,$now,600);
+}
+
 # ------------------------------------------------- Update symbolic store links
 
 sub symblist {
@@ -12872,18 +14180,16 @@ sub symbverify {
 
     if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
                             &GDBM_READER(),0640)) {
-        my $noclutter;
         if (($thisurl =~ m{^/adm/wrapper/ext/}) || ($thisurl =~ m{^ext/})) {
             $thisurl =~ s/\?.+$//;
             if ($map =~ m{^uploaded/.+\.page$}) {
                 $thisurl =~ s{^(/adm/wrapper|)/ext/}{http://};
                 $thisurl =~ s{^\Qhttp://https://\E}{https://};
-                $noclutter = 1;
             }
         }
         my $ids;
-        if ($noclutter) {
-            $ids=$bighash{'ids_'.$thisurl};
+        if ($map =~ m{^uploaded/.+\.page$}) {
+            $ids=$bighash{'ids_'.&clutter_with_no_wrapper($thisurl)};
         } else {
             $ids=$bighash{'ids_'.&clutter($thisurl)};
         }
@@ -12983,19 +14289,22 @@ sub deversion {
 # ------------------------------------------------------ Return symb list entry
 
 sub symbread {
-    my ($thisfn,$donotrecurse,$ignorecachednull,$checkforblock,$possibles)=@_;
+    my ($thisfn,$donotrecurse,$ignorecachednull,$checkforblock,$possibles,
+        $ignoresymbdb,$noenccheck)=@_;
     my $cache_str='request.symbread.cached.'.$thisfn;
     if (defined($env{$cache_str})) {
-        if ($ignorecachednull) {
-            return $env{$cache_str} unless ($env{$cache_str} eq '');
-        } else {
-            return $env{$cache_str};
+        unless (ref($possibles) eq 'HASH') {
+            if ($ignorecachednull) {
+                return $env{$cache_str} unless ($env{$cache_str} eq '');
+            } else {
+                return $env{$cache_str};
+            }
         }
     }
 # no filename provided? try from environment
     unless ($thisfn) {
         if ($env{'request.symb'}) {
-	    return $env{$cache_str}=&symbclean($env{'request.symb'});
+            return $env{$cache_str}=&symbclean($env{'request.symb'});
 	}
 	$thisfn=$env{'request.filename'};
     }
@@ -13011,17 +14320,18 @@ sub symbread {
     my %bighash;
     my $syval='';
     if (($env{'request.course.fn'}) && ($thisfn)) {
-        my $targetfn = $thisfn;
-        if ( ($thisfn =~ m/^(uploaded|editupload)\//) && ($thisfn !~ m/\.(page|sequence)$/) ) {
-            $targetfn = 'adm/wrapper/'.$thisfn;
-        }
-	if ($targetfn =~ m|^adm/wrapper/(ext/.*)|) {
-	    $targetfn=$1;
-	}
-        if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
-                      &GDBM_READER(),0640)) {
-	    $syval=$hash{$targetfn};
-            untie(%hash);
+        unless ($ignoresymbdb) {
+            if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
+                          &GDBM_READER(),0640)) {
+	        $syval=$hash{$thisfn};
+                untie(%hash);
+            }
+            if ($syval && $checkforblock) {
+                my @blockers = &has_comm_blocking('bre',$syval,$thisfn,$ignoresymbdb,$noenccheck);
+                if (@blockers) {
+                    $syval='';
+                }
+            }
         }
 # ---------------------------------------------------------- There was an entry
         if ($syval) {
@@ -13054,13 +14364,18 @@ sub symbread {
 		     $syval=&encode_symb($bighash{'map_id_'.$mapid},
 						    $resid,$thisfn);
                      if (ref($possibles) eq 'HASH') {
-                         $possibles->{$syval} = 1;    
+                         unless ($bighash{'randomout_'.$ids} || $env{'request.role.adv'}) {
+                             $possibles->{$syval} = 1;
+                         }
                      }
                      if ($checkforblock) {
-                         my @blockers = &has_comm_blocking('bre',$syval,$bighash{'src_'.$ids});
-                         if (@blockers) {
-                             $syval = '';
-                             return;
+                         unless ($bighash{'randomout_'.$ids} || $env{'request.role.adv'}) {
+                             my @blockers = &has_comm_blocking('bre',$syval,$bighash{'src_'.$ids},'',$noenccheck);
+                             if (@blockers) {
+                                 $syval = '';
+                                 untie(%bighash);
+                                 return $env{$cache_str}='';
+                             }
                          }
                      }
                  } elsif ((!$donotrecurse) || ($checkforblock) || (ref($possibles) eq 'HASH')) { 
@@ -13079,12 +14394,13 @@ sub symbread {
                              if ($bighash{'map_type_'.$mapid} ne 'page') {
                                  my $poss_syval=&encode_symb($bighash{'map_id_'.$mapid},
 						             $resid,$thisfn);
-                                 if (ref($possibles) eq 'HASH') {
-                                     $possibles->{$syval} = 1;
-                                 }
+                                 next if ($bighash{'randomout_'.$id} && !$env{'request.role.adv'});
+                                 next unless (($noenccheck) || ($bighash{'encrypted_'.$id} eq $env{'request.enc'}));
                                  if ($checkforblock) {
-                                     my @blockers = &has_comm_blocking('bre',$poss_syval,$file);
-                                     unless (@blockers > 0) {
+                                     my @blockers = &has_comm_blocking('bre',$poss_syval,$file,'',$noenccheck);
+                                     if (@blockers > 0) {
+                                         $syval = '';
+                                     } else {
                                          $syval = $poss_syval;
                                          $realpossible++;
                                      }
@@ -13092,6 +14408,11 @@ sub symbread {
                                      $syval = $poss_syval;
                                      $realpossible++;
                                  }
+                                 if ($syval) {
+                                     if (ref($possibles) eq 'HASH') {
+                                         $possibles->{$syval} = 1;
+                                     }
+                                 }
                              }
 			 }
                      }
@@ -13810,10 +15131,15 @@ sub machine_ids {
 
 sub additional_machine_domains {
     my @domains;
-    open(my $fh,"<","$perlvar{'lonTabDir'}/expected_domains.tab");
-    while( my $line = <$fh>) {
-        $line =~ s/\s//g;
-        push(@domains,$line);
+    if (-e "$perlvar{'lonTabDir'}/expected_domains.tab") {
+        if (open(my $fh,"<","$perlvar{'lonTabDir'}/expected_domains.tab")) {
+            while (my $line = <$fh>) {
+                chomp($line);           
+                $line =~ s/\s//g;
+                push(@domains,$line);
+            }
+            close($fh);
+        }
     }
     return @domains;
 }
@@ -13831,6 +15157,30 @@ sub default_login_domain {
     return $domain;
 }
 
+sub shared_institution {
+    my ($dom,$lonhost) = @_;
+    if ($lonhost eq '') {
+        $lonhost = $perlvar{'lonHostID'};
+    }
+    my $same_intdom;
+    my $hostintdom = &internet_dom($lonhost);
+    if ($hostintdom ne '') {
+        my %iphost = &get_iphost();
+        my $primary_id = &domain($dom,'primary');
+        my $primary_ip = &get_host_ip($primary_id);
+        if (ref($iphost{$primary_ip}) eq 'ARRAY') {
+            foreach my $id (@{$iphost{$primary_ip}}) {
+                my $intdom = &internet_dom($id);
+                if ($intdom eq $hostintdom) {
+                    $same_intdom = 1;
+                    last;
+                }
+            }
+        }
+    }
+    return $same_intdom;
+}
+
 sub uses_sts {
     my ($ignore_cache) = @_;
     my $lonhost = $perlvar{'lonHostID'};
@@ -13869,6 +15219,230 @@ sub uses_sts {
     return;
 }
 
+sub waf_allssl {
+    my ($host_name) = @_;
+    my $alias = &get_proxy_alias();
+    if ($host_name eq '') {
+        $host_name = $ENV{'SERVER_NAME'};
+    }
+    if (($host_name ne '') && ($alias eq $host_name)) {
+        my $serverhomedom = &host_domain($perlvar{'lonHostID'});
+        my %defdomdefaults = &get_domain_defaults($serverhomedom);
+        if ($defdomdefaults{'waf_sslopt'}) {
+            return $defdomdefaults{'waf_sslopt'};
+        }
+    }
+    return;
+}
+
+sub get_requestor_ip {
+    my ($r,$nolookup,$noproxy) = @_;
+    my $from_ip;
+    if (ref($r)) {
+        if ($r->can('useragent_ip')) {
+            if ($noproxy && $r->can('client_ip')) {
+                $from_ip = $r->client_ip();
+            } else {
+                $from_ip = $r->useragent_ip();
+            }
+        } elsif ($r->connection->can('remote_ip')) {
+            $from_ip = $r->connection->remote_ip();
+        } else {
+            $from_ip = $r->get_remote_host($nolookup);
+        }
+    } else {
+        $from_ip = $ENV{'REMOTE_ADDR'};
+    }
+    return $from_ip if ($noproxy); 
+    # Who controls proxy settings for server
+    my $dom_in_use = $Apache::lonnet::perlvar{'lonDefDomain'};
+    my $proxyinfo = &get_proxy_settings($dom_in_use);
+    if ((ref($proxyinfo) eq 'HASH') && ($from_ip)) {
+        if ($proxyinfo->{'vpnint'}) {
+            if (&ip_match($from_ip,$proxyinfo->{'vpnint'})) {
+                return $from_ip;
+            }
+        }
+        if ($proxyinfo->{'trusted'}) {
+            if (&ip_match($from_ip,$proxyinfo->{'trusted'})) {
+                my $ipheader = $proxyinfo->{'ipheader'};
+                my ($ip,$xfor);
+                if (ref($r)) {
+                    if ($ipheader) {
+                        $ip = $r->headers_in->{$ipheader};
+                    }
+                    $xfor = $r->headers_in->{'X-Forwarded-For'};
+                } else {
+                    if ($ipheader) {
+                        $ip = $ENV{'HTTP_'.uc($ipheader)};
+                    }
+                    $xfor = $ENV{'HTTP_X_FORWARDED_FOR'};
+                }
+                if (($ip eq '') && ($xfor ne '')) {
+                    foreach my $poss_ip (reverse(split(/\s*,\s*/,$xfor))) {
+                        unless (&ip_match($poss_ip,$proxyinfo->{'trusted'})) {
+                            $ip = $poss_ip;
+                            last;
+                        }
+                    }
+                }
+                if ($ip ne '') {
+                    return $ip;
+                }
+            }
+        }
+    }
+    return $from_ip;
+}
+
+sub get_proxy_settings {
+    my ($dom_in_use) = @_;
+    my %domdefaults = &get_domain_defaults($dom_in_use);
+    my $proxyinfo = {
+                       ipheader => $domdefaults{'waf_ipheader'},
+                       trusted  => $domdefaults{'waf_trusted'},
+                       vpnint   => $domdefaults{'waf_vpnint'},
+                       vpnext   => $domdefaults{'waf_vpnext'},
+                       sslopt   => $domdefaults{'waf_sslopt'},
+                    };
+    return $proxyinfo;
+}
+
+sub ip_match {
+    my ($ip,$pattern_str) = @_;
+    $ip=Net::CIDR::cidrvalidate($ip);
+    if ($ip) {
+        return Net::CIDR::cidrlookup($ip,split(/\s*,\s*/,$pattern_str));
+    }
+    return;
+}
+
+sub get_proxy_alias {
+    my ($lonid) = @_;
+    if ($lonid eq '') {
+        $lonid = $perlvar{'lonHostID'};
+    }
+    if (!defined(&hostname($lonid))) {
+        return;
+    }
+    if ($lonid ne '') {
+        my ($alias,$cached) = &is_cached_new('proxyalias',$lonid);
+        if ($cached) {
+            return $alias;
+        }
+        my $dom = &host_domain($lonid);
+        if ($dom ne '') {
+            my $cachetime = 60*60*24;
+            my %domconfig =
+                &get_dom('configuration',['wafproxy'],$dom);
+            if (ref($domconfig{'wafproxy'}) eq 'HASH') {
+                if (ref($domconfig{'wafproxy'}{'alias'}) eq 'HASH') {
+                    $alias = $domconfig{'wafproxy'}{'alias'}{$lonid};
+                }
+            }
+            return &do_cache_new('proxyalias',$lonid,$alias,$cachetime);
+        }
+    }
+    return;
+}
+
+sub use_proxy_alias {
+    my ($r,$lonid) = @_;
+    my $alias = &get_proxy_alias($lonid);
+    if ($alias) {
+        my $dom = &host_domain($lonid);
+        if ($dom ne '') {
+            my $proxyinfo = &get_proxy_settings($dom);
+            my ($vpnint,$remote_ip);
+            if (ref($proxyinfo) eq 'HASH') {
+                $vpnint = $proxyinfo->{'vpnint'};
+                if ($vpnint) {
+                    $remote_ip = &get_requestor_ip($r,1,1);
+                }
+            }
+            unless ($vpnint && &ip_match($remote_ip,$vpnint)) {
+                return $alias;
+            }
+        }
+    }
+    return;
+}
+
+sub alias_sso {
+    my ($lonid) = @_;
+    if ($lonid eq '') {
+        $lonid = $perlvar{'lonHostID'};
+    }
+    if (!defined(&hostname($lonid))) {
+        return;
+    }
+    if ($lonid ne '') {
+        my ($use_alias,$cached) = &is_cached_new('proxysaml',$lonid);
+        if ($cached) {
+            return $use_alias;
+        }
+        my $dom = &host_domain($lonid);
+        if ($dom ne '') {
+            my $cachetime = 60*60*24;
+            my %domconfig =
+                &get_dom('configuration',['wafproxy'],$dom);
+            if (ref($domconfig{'wafproxy'}) eq 'HASH') {
+                if (ref($domconfig{'wafproxy'}{'saml'}) eq 'HASH') {
+                    $use_alias = $domconfig{'wafproxy'}{'saml'}{$lonid};
+                }
+            }
+            return &do_cache_new('proxysaml',$lonid,$use_alias,$cachetime);
+        }
+    }
+    return;
+}
+
+sub get_saml_landing {
+    my ($lonid) = @_;
+    if ($lonid eq '') {
+        my $defdom = &default_login_domain();
+        my @hosts = &current_machine_ids();
+        if (@hosts > 1) {
+            foreach my $hostid (@hosts) {
+                if (&host_domain($hostid) eq $defdom) {
+                    $lonid = $hostid;
+                    last;
+                }
+            }
+        } else {
+            $lonid = $perlvar{'lonHostID'};
+        }
+        if ($lonid) {
+            unless (&host_domain($lonid) eq $defdom) {
+                return;
+            }
+        } else {
+            return;
+        }
+    } elsif (!defined(&hostname($lonid))) {
+        return;
+    }
+    my ($landing,$cached) = &is_cached_new('samllanding',$lonid);
+    if ($cached) {
+        return $landing;
+    }
+    my $dom = &host_domain($lonid);
+    if ($dom ne '') {
+        my $cachetime = 60*60*24;
+        my %domconfig =
+            &get_dom('configuration',['login'],$dom);
+        if (ref($domconfig{'login'}) eq 'HASH') {
+            if (ref($domconfig{'login'}{'saml'}) eq 'HASH') {
+                if (ref($domconfig{'login'}{'saml'}{$lonid}) eq 'HASH') {
+                    $landing = 1;
+                }
+            }
+        }
+        return &do_cache_new('samllanding',$lonid,$landing,$cachetime);
+    }
+    return;
+}
+
 # ------------------------------------------------------------- Declutters URLs
 
 sub declutter {
@@ -13986,7 +15560,7 @@ sub get_dns {
     my ($url,$func,$ignore_cache,$nocache,$hashref) = @_;
     if (!$ignore_cache) {
 	my ($content,$cached)=
-	    &Apache::lonnet::is_cached_new('dns',$url);
+	    &is_cached_new('dns',$url);
 	if ($cached) {
 	    &$func($content,$hashref);
 	    return;
@@ -14008,14 +15582,33 @@ sub get_dns {
     }
     while (%alldns) {
 	my ($dns) = sort { $b cmp $a } keys(%alldns);
-	my $request=new HTTP::Request('GET',"$alldns{$dns}://$dns$url");
-        my $response = &LONCAPA::LWPReq::makerequest('',$request,'',\%perlvar,30,0);
-        delete($alldns{$dns});
-	next if ($response->is_error());
+        my ($contents,@content);
+        if ($dns eq Sys::Hostname::FQDN::fqdn()) {
+            my $command = (split('/',$url))[3];
+            my ($dir,$file) = &parse_getdns_url($command,$url);
+            delete($alldns{$dns});
+            next if (($dir eq '') || ($file eq ''));
+            if (open(my $config,'<',"$dir/$file")) {
+                @content = <$config>;
+                close($config);
+            }
+            if ($url eq '/adm/dns/loncapaCRL') {
+                $contents = join('',@content);
+            }
+        } else {
+	    my $request=new HTTP::Request('GET',"$alldns{$dns}://$dns$url");
+            my $response = &LONCAPA::LWPReq::makerequest('',$request,'',\%perlvar,30,0);
+            delete($alldns{$dns});
+	    next if ($response->is_error());
+            if ($url eq '/adm/dns/loncapaCRL') {
+                $contents = $response->content;
+            } else {
+                @content = split("\n",$response->content);
+            }
+        }
         if ($url eq '/adm/dns/loncapaCRL') {
-            return &$func($response);
+            return &$func($contents);
         } else {
-	    my @content = split("\n",$response->content);
 	    unless ($nocache) {
 	        &do_cache_new('dns',$url,\@content,30*24*60*60);
 	    }
@@ -14046,7 +15639,7 @@ sub get_dns {
 sub parse_dns_checksums_tab {
     my ($lines,$hashref) = @_;
     my $lonhost = $perlvar{'lonHostID'};
-    my $machine_dom = &Apache::lonnet::host_domain($lonhost);
+    my $machine_dom = &host_domain($lonhost);
     my $loncaparev = &get_server_loncaparev($machine_dom);
     my $distro = (split(/\:/,&get_server_distarch($lonhost)))[0];
     my $webconfdir = '/etc/httpd/conf';
@@ -14090,7 +15683,7 @@ sub parse_dns_checksums_tab {
 
 sub fetch_dns_checksums {
     my %checksums;
-    my $machine_dom = &Apache::lonnet::host_domain($perlvar{'lonHostID'});
+    my $machine_dom = &host_domain($perlvar{'lonHostID'});
     my $loncaparev = &get_server_loncaparev($machine_dom,$perlvar{'lonHostID'});
     my ($release,$timestamp) = split(/\-/,$loncaparev);
     &get_dns("/adm/dns/checksums/$release",\&parse_dns_checksums_tab,1,1,
@@ -14103,14 +15696,14 @@ sub fetch_crl_pemfile {
 }
 
 sub save_crl_pem {
-    my ($response) = @_;
+    my ($content) = @_;
     my ($msg,$hadchanges);
-    if (ref($response)) {
+    if ($content ne '') {
         my $now = time;
         my $lonca = $perlvar{'lonCertificateDirectory'}.'/'.$perlvar{'lonnetCertificateAuthority'};
         my $tmpcrl = $tmpdir.'/'.$perlvar{'lonnetCertRevocationList'}.'_'.$now.'.'.$$.'.tmp';
         if (open(my $fh,'>',"$tmpcrl")) {
-            print $fh $response->content;
+            print $fh $content;
             close($fh);
             if (-e $lonca) {
                 if (open(PIPE,"openssl crl -in $tmpcrl -inform pem -CAfile $lonca -noout 2>&1 |")) {
@@ -14171,6 +15764,24 @@ sub save_crl_pem {
     return ($msg,$hadchanges);
 }
 
+sub parse_getdns_url {
+    my ($command,$url) = @_;
+    my $dir = $perlvar{'lonTabDir'};
+    my $file;
+    if ($command eq 'hosts') {
+        $file = 'dns_hosts.tab';
+    } elsif ($command eq 'domain') {
+        $file = 'dns_domain.tab';
+    } elsif ($command eq 'checksums') {
+        my $version = (split('/',$url))[4];
+        $file = "dns_checksums/$version.tab",
+    } elsif ($command eq 'loncapaCRL') {
+        $dir = $perlvar{'lonCertificateDirectory'};
+        $file = $perlvar{'lonnetCertRevocationList'};
+    }
+    return ($dir,$file);
+}
+
 # ------------------------------------------------------------ Read domain file
 {
     my $loaded;
@@ -14460,7 +16071,7 @@ sub save_crl_pem {
 		return %iphost;
 	    }
 	    my ($ip_info,$cached)=
-		&Apache::lonnet::is_cached_new('iphost','iphost');
+		&is_cached_new('iphost','iphost');
 	    if ($cached) {
 		%iphost      = %{$ip_info->[0]};
 		%name_to_ip  = %{$ip_info->[1]};
@@ -14472,7 +16083,7 @@ sub save_crl_pem {
 	# get yesterday's info for fallback
 	my %old_name_to_ip;
 	my ($ip_info,$cached)=
-	    &Apache::lonnet::is_cached_new('iphost','iphost');
+	    &is_cached_new('iphost','iphost');
 	if ($cached) {
 	    %old_name_to_ip = %{$ip_info->[1]};
 	}
@@ -14539,7 +16150,7 @@ sub save_crl_pem {
         my ($lonid) = @_;
         return if ($lonid eq '');
         my ($idnref,$cached)=
-            &Apache::lonnet::is_cached_new('internetnames',$lonid);
+            &is_cached_new('internetnames',$lonid);
         if ($cached) {
             return $idnref;
         }
@@ -14737,6 +16348,16 @@ BEGIN {
 
 }
 
+# ------------- set default texengine (domain default overrides this)
+{
+    $deftex = LONCAPA::texengine();
+}
+
+# ------------- set default minimum length for passwords for internal auth users
+{
+    $passwdmin = LONCAPA::passwd_min();
+}
+
 $memcache=new Cache::Memcached({'servers'           => ['127.0.0.1:11211'],
 				'compress_threshold'=> 20_000,
  			        });
@@ -15369,10 +16990,6 @@ data base, returning a hash that is keye
 values that are the resource value.  I believe that the timestamps and
 versions are also returned.
 
-get_numsuppfiles($cnum,$cdom) : retrieve number of files in a course's
-supplemental content area. This routine caches the number of files for 
-10 minutes.
-
 =back
 
 =head2 Course Modification
@@ -15462,7 +17079,6 @@ Returns:
                       for the sheet of paper
       FirstName   - column that the first name starts in
       FirstNameLength - number of columns that the first name spans
-
       LastName    - column that the last name starts in
       LastNameLength - number of columns that the last name spans
       BubblesPerRow - number of bubbles available in each row used to