--- loncom/lonnet/perl/lonnet.pm	2020/10/06 20:02:55	1.1172.2.118.2.9
+++ loncom/lonnet/perl/lonnet.pm	2023/01/21 00:14:13	1.1172.2.146.2.9
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # TCP networking package
 #
-# $Id: lonnet.pm,v 1.1172.2.118.2.9 2020/10/06 20:02:55 raeburn Exp $
+# $Id: lonnet.pm,v 1.1172.2.146.2.9 2023/01/21 00:14:13 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -95,6 +95,8 @@ 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;
@@ -125,12 +127,13 @@ 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'     => $uname,
@@ -688,6 +691,9 @@ sub check_for_valid_session {
     if (ref($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'};
+        }
     }
     untie(%disk_env);
 
@@ -916,7 +922,7 @@ 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) ? $loadpercent 
@@ -961,6 +967,8 @@ sub spareserver {
                 if ($protocol{$spare_server} eq 'https') {
                     $protocol = $protocol{$spare_server};
                 }
+                my $alias = &Apache::lonnet::use_proxy_alias($r,$spare_server);
+                $hostname = $alias if ($alias ne '');
 	        $spare_server = $protocol.'://'.$hostname;
             }
         }
@@ -1082,6 +1090,21 @@ 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)\_($match_username)\_[a-f0-9]{32}$/) {
@@ -1091,7 +1114,7 @@ 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),$balancer);
         }
     }
 }
@@ -1231,7 +1254,7 @@ sub changepass {
 sub queryauthenticate {
     my ($uname,$udom)=@_;
     my $uhome=&homeserver($uname,$udom);
-    if (!$uhome) {
+    if ((!$uhome) || ($uhome eq 'no_host')) {
 	&logthis("User $uname at $udom is unknown when looking for authentication mechanism");
 	return 'no_host';
     }
@@ -1280,12 +1303,35 @@ sub authenticate {
     }
     if ($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;
@@ -1360,6 +1406,15 @@ 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);
@@ -1578,7 +1633,7 @@ 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($offloadto->{'primary'}) eq 'ARRAY') {
@@ -1618,9 +1673,9 @@ sub check_loadbalancing {
                 }
             }
         }
-        unless ($homeintdom) {
-            undef($setcookie);
-        }
+    }
+    if (($is_balancer) && (!$homeintdom)) {
+        undef($setcookie);
     }
     return ($is_balancer,$otherserver,$setcookie);
 }
@@ -1850,7 +1905,7 @@ 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) {
@@ -1874,10 +1929,15 @@ 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 /) {
@@ -1901,7 +1961,7 @@ 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'))) {
@@ -1922,7 +1982,7 @@ 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);
@@ -1960,6 +2020,57 @@ 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) = @_;
@@ -2002,7 +2113,7 @@ 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';
         }
@@ -2238,6 +2349,10 @@ sub inst_rulecheck {
                     $response=&unescape(&reply('instidrulecheck:'.&escape($udom).
                                               ':'.&escape($id).':'.$rulestr,
                                               $homeserver));
+                } elsif ($item eq 'unamemap') {
+                    $response=&unescape(&reply('instunamemapcheck:'.
+                                               &escape($udom).':'.&escape($uname).
+                                              ':'.$rulestr,$homeserver));
                 } elsif ($item eq 'selfcreate') {
                     $response=&unescape(&reply('instselfcreatecheck:'.
                                                &escape($udom).':'.&escape($uname).
@@ -2271,6 +2386,9 @@ sub inst_userrules {
             } elsif ($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),
                                  $homeserver);
@@ -2317,7 +2435,7 @@ sub get_domain_defaults {
                                   'coursedefaults','usersessions',
                                   'requestauthor','selfenrollment',
                                   'coursecategories','autoenroll',
-                                  'helpsettings'],$domain);
+                                  'helpsettings','wafproxy','ltisec'],$domain);
     my @coursetypes = ('official','unofficial','community','textbook');
     if (ref($domconfig{'defaults'}) eq 'HASH') {
         $domdefaults{'lang_def'} = $domconfig{'defaults'}{'lang_def'}; 
@@ -2329,6 +2447,7 @@ sub get_domain_defaults {
         $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');
@@ -2365,6 +2484,7 @@ sub get_domain_defaults {
     }
     if (ref($domconfig{'coursedefaults'}) eq 'HASH') {
         $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'} = $domconfig{'coursedefaults'}{'postsubmit'}{'client'};
@@ -2398,6 +2518,9 @@ sub get_domain_defaults {
         if ($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($domconfig{'usersessions'}{'remote'}) eq 'HASH') {
@@ -2409,6 +2532,9 @@ sub get_domain_defaults {
         if (ref($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($domconfig{'selfenrollment'}{'admin'}) eq 'HASH') {
@@ -2450,6 +2576,7 @@ sub get_domain_defaults {
     }
     if (ref($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'};
@@ -2457,6 +2584,25 @@ 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{'privhosts'} = $domconfig{'ltisec'}{'private'}{'keys'};
+            }
+        }
+    }
     &do_cache_new('domdefaults',$domain,\%domdefaults,$cachetime);
     return %domdefaults;
 }
@@ -2544,7 +2690,7 @@ sub get_passwdconf {
 }
 
 sub course_portal_url {
-    my ($cnum,$cdom) = @_;
+    my ($cnum,$cdom,$r) = @_;
     my $chome = &homeserver($cnum,$cdom);
     my $hostname = &hostname($chome);
     my $protocol = $protocol{$chome};
@@ -2554,6 +2700,8 @@ sub course_portal_url {
     if ($domdefaults{'portal_def'}) {
         $firsturl = $domdefaults{'portal_def'};
     } else {
+        my $alias = &Apache::lonnet::use_proxy_alias($r,$chome);
+        $hostname = $alias if ($alias ne '');
         $firsturl = $protocol.'://'.$hostname;
     }
     return $firsturl;
@@ -3143,11 +3291,29 @@ 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;
 }
 
@@ -3164,12 +3330,13 @@ sub absolute_url {
 sub ssi {
 
     my ($fn,%form)=@_;
-    my ($request,$response);
+    my ($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{$_}) eq 'ARRAY'
@@ -3177,7 +3344,7 @@ sub ssi {
             : &escape($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'});
@@ -3748,6 +3915,10 @@ sub clean_filename {
 # 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;
 }
 
@@ -4305,7 +4476,7 @@ sub bubblesheet_converter {
                     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 > $qstart)) ||
@@ -4488,6 +4659,7 @@ sub get_scantronformat_file {
                 close($fh);
             }
         }
+        chomp(@lines);
     }
     return @lines;
 }
@@ -4609,6 +4781,29 @@ 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 ramain 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'};
             }
@@ -4718,7 +4913,11 @@ 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};
+                    }
                 }
             }
         }
@@ -5550,13 +5749,14 @@ sub checkout {
     my ($symb,$tuname,$tudom,$tcrsid)=@_;
     my $now=time;
     my $lonhost=$perlvar{'lonHostID'};
+    my $ip = &get_requestor_ip();
     my $infostr=&escape(
                  'CHECKOUTTOKEN&'.
                  $tuname.'&'.
                  $tudom.'&'.
                  $tcrsid.'&'.
                  $symb.'&'.
-                 $now.'&'.$ENV{'REMOTE_ADDR'});
+                 $now.'&'.$ip);
     my $token=&reply('tmpput:'.$infostr,$lonhost);
     if ($token=~/^error\:/) {
         &logthis("<font color=\"blue\">WARNING: ".
@@ -5570,7 +5770,7 @@ sub checkout {
 
     my %infohash=('resource.0.outtoken' => $token,
                   'resource.0.checkouttime' => $now,
-                  'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
+                  'resource.0.outremote' => $ip);
 
     unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
        return '';
@@ -5601,6 +5801,7 @@ sub checkin {
     $lonhost=~tr/A-Z/a-z/;
     my $dtoken=$ta.'_'.&hostname($lonhost).'_'.$tb;
     $dtoken=~s/\W/\_/g;
+    my $ip = &get_requestor_ip();
     my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
                  split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
 
@@ -5617,7 +5818,7 @@ sub checkin {
 
     my %infohash=('resource.0.intoken' => $token,
                   'resource.0.checkintime' => $now,
-                  'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
+                  'resource.0.inremote' => $ip);
 
     unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
        return '';
@@ -5885,7 +6086,7 @@ 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 $path=LONCAPA::tempdir();
   my %hash;
@@ -5922,7 +6123,7 @@ sub tmpstore {
   if (!$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 $now=time;
   my %hash;
@@ -5966,7 +6167,7 @@ sub tmprestore {
   if (!$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;
   $namespace=~s/\//\_/g;
@@ -6022,7 +6223,7 @@ sub store {
     }
     if (!$home) { $home=$env{'user.home'}; }
 
-    $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
+    $$storehash{'ip'}=&get_requestor_ip();
     $$storehash{'host'}=$perlvar{'lonHostID'};
 
     my $namevalue='';
@@ -6058,7 +6259,7 @@ sub cstore {
     }
     if (!$home) { $home=$env{'user.home'}; }
 
-    $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
+    $$storehash{'ip'}=&get_requestor_ip();
     $$storehash{'host'}=$perlvar{'lonHostID'};
 
     my $namevalue='';
@@ -6476,31 +6677,31 @@ 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 {
@@ -6764,7 +6965,8 @@ sub set_adhoc_privileges {
     my ($author,$adv,$rar)= &set_userprivs(\%userroles,\%rolehash);
     &appenv(\%userroles,[$role,'cm']);
     &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},"Role ".$spec);
-    unless ($caller eq 'constructaccess' && $env{'request.course.id'}) {
+    unless (($caller eq 'constructaccess' && $env{'request.course.id'}) ||
+            ($caller eq 'tiny')) {
         &appenv( {'request.role'        => $spec,
                   'request.role.domain' => $dcdom,
                   'request.course.sec'  => $sec, 
@@ -6839,7 +7041,7 @@ 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);
@@ -6855,7 +7057,12 @@ 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 (!($rep =~ /^error/ )) {
@@ -6915,7 +7122,7 @@ sub currentdump {
    #
    my %returnhash=();
    #
-   if ($rep eq 'unknown_cmd') {
+   if ($rep eq "unknown_cmd") { 
        # an old lond will not know currentdump
        # Do a dump and make it look like a currentdump
        my @tmp = &dumpstore($courseid,$sdom,$sname,'.');
@@ -7001,7 +7208,7 @@ 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);
@@ -7010,7 +7217,11 @@ 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
@@ -7050,7 +7261,8 @@ 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'});
@@ -7274,15 +7486,15 @@ 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,$by_ip,$blockdo) =
+                &Apache::loncommon::blockcheck(\%setters,'port',$clientip);
+            if (($startblock && $endblock) || ($by_ip)) {
                 return 'B';
             }
         }
@@ -7546,6 +7758,7 @@ sub usertools_access {
                       blog      => 1,
                       webdav    => 1,
                       portfolio => 1,
+                      timezone  => 1,
                  );
     }
     return if (!defined($tools{$tool}));
@@ -7831,14 +8044,14 @@ sub customaccess {
 # ------------------------------------------------- Check for a user privilege
 
 sub allowed {
-    my ($priv,$uri,$symb,$role,$clientip,$noblockcheck,$ignorecache)=@_;
+    my ($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 {
@@ -7848,7 +8061,7 @@ 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';
@@ -7859,9 +8072,9 @@ 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';
@@ -7896,7 +8109,10 @@ sub allowed {
 # Free bre to public access
 
     if ($priv eq 'bre') {
-        my $copyright=&metadata($uri,'copyright');
+        my $copyright;
+        unless ($uri =~ /ext\.tool/) {
+            $copyright=&metadata($uri,'copyright');
+        }
 	if (($copyright eq 'public') && (!$env{'request.course.id'})) { 
            return 'F'; 
         }
@@ -7954,8 +8170,8 @@ 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;
                                 }
@@ -7967,8 +8183,8 @@ 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)) {
                                     $ownaccess = 1;
                                     last;
                                 }
@@ -8053,7 +8269,13 @@ sub allowed {
             if ($env{'user.priv.'.$env{'request.role'}.'./'}
                   =~/\Q$priv\E\&([^\:]*)/) {
                 my $value = $1;
-                if ($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,$uri,$ignorecache);
@@ -8073,7 +8295,13 @@ sub allowed {
                     $refuri=&declutter($refuri);
                     my ($match) = &is_on_map($refuri);
                     if ($match) {
-                        if ($noblockcheck) {
+                        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,'',$refuri,'',1);
@@ -8095,7 +8323,7 @@ sub allowed {
 	&& &is_portfolio_url($uri)) {
 	$thisallowed = &portfolio_access($uri,$clientip);
     }
-
+    
 # Full access at system, domain or course-wide level? Exit.
     if ($thisallowed=~/F/) {
 	return 'F';
@@ -8146,7 +8374,13 @@ 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,$uri,$ignorecache);
@@ -8188,7 +8422,13 @@ sub allowed {
                   =~/\Q$priv\E\&([^\:]*)/) {
                   my $value = $1;
                   if ($priv eq 'bre') {
-                      if ($noblockcheck) {
+                      my $deeplinkblock;
+                      unless ($nodeeplinkcheck) {
+                          $deeplinkblock = &deeplink_check($priv,$symb,$refuri);
+                      }
+                      if ($deeplinkblock) {
+                          $thisallowed = 'D';
+                      } elsif ($noblockcheck) {
                           $thisallowed.=$value;
                       } else {
                           my @blockers = &has_comm_blocking($priv,'',$refuri,'',1);
@@ -8233,16 +8473,48 @@ 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) {
 		  $expiretime=120;
@@ -8265,7 +8537,7 @@ sub allowed {
                }
                if (($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 '.
@@ -8336,6 +8608,17 @@ 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 ($thisallowed=~/X/) {
@@ -8356,6 +8639,8 @@ sub allowed {
 	return 'A';
     } elsif ($thisallowed eq 'B') {
         return 'B';
+    } elsif ($thisallowed eq 'D') {
+        return 'D';
     }
    return 'F';
 }
@@ -8482,7 +8767,11 @@ sub get_commblock_resources {
     my ($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 = %{$blocks};
@@ -8514,10 +8803,9 @@ sub get_commblock_resources {
             }
         } elsif ($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') {
                         $type = 'course';
@@ -8526,32 +8814,16 @@ sub get_commblock_resources {
                         if ($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 = ($timelimit,'map');
                             }
                         }
                     }
                     if ($interval[0] =~ /^(\d+)/) {
-                        my $timelimit = $1; 
+                        my $timelimit = $1;
                         my $first_access;
                         if ($type eq 'resource') {
                             $first_access=&get_first_access($interval[1],$item);
@@ -8564,10 +8836,37 @@ 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) {
@@ -8597,8 +8896,12 @@ sub has_comm_blocking {
     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');
+    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);
@@ -8655,6 +8958,87 @@ sub has_comm_blocking {
 }
 }
 
+sub deeplink_check {
+    my ($priv,$symb,$uri) = @_;
+    return unless ($env{'request.course.id'});
+    return unless ($priv eq 'bre');
+    return if ($env{'request.state'} eq 'construct');
+    return if ($env{'request.role.adv'});
+    my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
+    my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
+    my (%possibles,@symbs);
+    if (!$symb) {
+        $symb = &symbread($uri,1,1,1,\%possibles);
+    }
+    if ($symb) {
+        @symbs = ($symb);
+    } elsif (keys(%possibles)) {
+        @symbs = keys(%possibles);
+    }
+
+    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);
+        my $deeplink = &EXT("resource.0.deeplink",$symb);
+        if ($deeplink eq '') {
+            $allow = 1;
+        } else {
+            my ($state,$others,$listed,$scope,$protect) = split(/,/,$deeplink);
+            if ($state ne 'only') {
+                $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'}))) {
+                            $check_deeplink_entry = 1
+                        }
+                    } elsif (($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'}))) {
+                            $check_deeplink_entry = 1;
+                        }
+                    }
+                }
+                if (($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)) {
+                                    $allow = 1;
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+    return if ($allow);
+    return 1;
+}
+
 # -------------------------------- Deversion and split uri into path an filename
 
 #
@@ -9049,6 +9433,25 @@ 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);
@@ -9320,6 +9723,38 @@ 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);
@@ -9864,11 +10299,23 @@ 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'})) {
@@ -9881,18 +10328,16 @@ 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'},
@@ -9966,13 +10411,14 @@ sub modifyuserauth {
              ' 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: '.$reply;
@@ -10493,7 +10939,7 @@ sub store_userdata {
             if (($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='';
@@ -11318,7 +11764,7 @@ sub get_userresdata {
 #  Parameters:
 #     $name      - Course/user name.
 #     $domain    - Name of the domain the user/course is registered on.
-#     $type      - Type of thing $name is (must be 'course' or 'user')
+#     $type      - Type of thing $name is (must be 'course' or 'user'
 #     @which     - Array of names of resources desired.
 #  Returns:
 #     The value of the first reasource in @which that is found in the
@@ -11339,64 +11785,204 @@ sub resdata {
     foreach my $item (@which) {
 	if (defined($result->{$item->[0]})) {
 	    return [$result->{$item->[0]},$item->[1]];
-        }
+	}
     }
     return undef;
 }
 
-sub get_domain_ltitools {
-    my ($cdom) = @_;
-    my %ltitools;
-    my ($result,$cached)=&is_cached_new('ltitools',$cdom);
+sub get_domain_lti {
+    my ($cdom,$context) = @_;
+    my ($name,$cachename,%lti);
+    if ($context eq 'consumer') {
+        $name = 'ltitools';
+    } elsif ($context eq 'provider') {
+        $name = 'lti';
+    } elsif ($context eq 'linkprot') {
+        $name = 'ltisec';
+    } else {
+        return %lti;
+    }
+
+    if ($context eq 'linkprot') {
+        $cachename = $context;
+    } else {
+        $cachename = $name;
+    }
+
+    my ($result,$cached)=&is_cached_new($cachename,$cdom);
     if (defined($cached)) {
         if (ref($result) eq 'HASH') {
-            %ltitools = %{$result};
+            %lti = %{$result};
         }
     } else {
-        my %domconfig = &get_dom('configuration',['ltitools'],$cdom);
-        if (ref($domconfig{'ltitools'}) eq 'HASH') {
-            %ltitools = %{$domconfig{'ltitools'}};
-            my %encdomconfig = &get_dom('encconfig',['ltitools'],$cdom);
-            if (ref($encdomconfig{'ltitools'}) eq 'HASH') {
-                foreach my $id (keys(%ltitools)) {
-                    if (ref($encdomconfig{'ltitools'}{$id}) eq 'HASH') {
-                        foreach my $item ('key','secret') {
-                            $ltitools{$id}{$item} = $encdomconfig{'ltitools'}{$id}{$item};
+        my %domconfig = &get_dom('configuration',[$name],$cdom);
+        if (ref($domconfig{$name}) eq 'HASH') {
+            if ($context eq 'linkprot') {
+                if (ref($domconfig{$name}{'linkprot'}) eq 'HASH') {
+                    %lti = %{$domconfig{$name}{'linkprot'}};
+                }
+            } else {
+                %lti = %{$domconfig{$name}};
+            }
+            if (($context eq 'consumer') && (keys(%lti))) {
+                my %encdomconfig = &get_dom('encconfig',[$name],$cdom,undef,1);
+                if (ref($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};
+                            }
                         }
                     }
                 }
             }
         }
         my $cachetime = 24*60*60;
-        &do_cache_new('ltitools',$cdom,\%ltitools,$cachetime);
+        &do_cache_new($cachename,$cdom,\%lti,$cachetime);
+    }
+    return %lti;
+}
+
+sub get_course_lti {
+    my ($cnum,$cdom) = @_;
+    my $hashid=$cdom.'_'.$cnum;
+    my %courselti;
+    my ($result,$cached)=&is_cached_new('courselti',$hashid);
+    if (defined($cached)) {
+        if (ref($result) eq 'HASH') {
+            %courselti = %{$result};
+        }
+    } else {
+        %courselti = &dump('lti',$cdom,$cnum,undef,undef,undef,1);
+        my $cachetime = 24*60*60;
+        &do_cache_new('courselti',$hashid,\%courselti,$cachetime);
     }
-    return %ltitools;
+    return %courselti;
 }
 
-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 $items = &freeze_escape($params);
+        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 $items = &freeze_escape($params);
+        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 $itemid;
+}
+
+sub count_supptools {
+    my ($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 $errors) = (0,0);
-            my $suppmap = 'supplemental.sequence';
-            ($suppcount,$errors) =
-                &Apache::loncommon::recurse_supplemental($cnum,$cdom,$suppmap,$suppcount,$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/$cnum/\d+/ext\.tool$}) {
+                            $numexttools ++;
+                        }
+                    }
+                }
+            }
+        }
+        &do_cache_new('supptools',$hashid,$numexttools,600);
+    }
+    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('suppcount',$hashid,$suppcount,600);
+        &do_cache_new('showsupp',$hashid,$showsupp,600);
     }
-    return $suppcount;
+    return $showsupp;
 }
 
 #
 # EXT resource caching routines
 #
 
+{
+# Cache (5 seconds) of map hierarchy for speedup of navmaps display
+#
+# The course for which we cache
+my $cachedmapkey='';
+# The cached recursive maps for this course
+my %cachedmaps=();
+# When this was last done
+my $cachedmaptime='';
+
 sub clear_EXT_cache_status {
     &delenv('cache.EXT.');
 }
@@ -11453,7 +12039,7 @@ sub EXT {
 	    if ( (defined($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{$qualifierrest})) {
@@ -11710,6 +12296,10 @@ sub EXT {
 	if ($space eq 'name') {
 	    return $ENV{'SERVER_NAME'};
         }
+    } elsif ($realm eq 'client') {
+        if ($space eq 'remote_addr') {
+            return &get_requestor_ip();
+        }
     }
     return '';
 }
@@ -11743,6 +12333,30 @@ sub check_group_parms {
     return $coursereply;
 }
 
+sub get_map_hierarchy {
+    my ($mapname,$courseid) = @_;
+    my @recurseup = ();
+    if ($mapname) {
+        if (($cachedmapkey eq $courseid) &&
+            (abs($cachedmaptime-time)<5)) {
+            if (ref($cachedmaps{$mapname}) eq 'ARRAY') {
+                return @{$cachedmaps{$mapname}};
+            }
+        }
+        my $navmap = Apache::lonnavmaps::navmap->new();
+        if (ref($navmap)) {
+            @recurseup = $navmap->recurseup_maps($mapname);
+            undef($navmap);
+            $cachedmaps{$mapname} = \@recurseup;
+            $cachedmaptime=time;
+            $cachedmapkey=$courseid;
+        }
+    }
+    return @recurseup;
+}
+
+}
+
 sub sort_course_groups { # Sort groups based on defined rankings. Default is sort().
     my ($courseid,@groups) = @_;
     @groups = sort(@groups);
@@ -12364,11 +12978,68 @@ 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 {
@@ -12555,17 +13226,10 @@ 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=$1;
-	}
         unless ($ignoresymbdb) {
             if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
                           &GDBM_READER(),0640)) {
-	        $syval=$hash{$targetfn};
+	        $syval=$hash{$thisfn};
                 untie(%hash);
             }
             if ($syval && $checkforblock) {
@@ -13374,10 +14038,15 @@ 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;
 }
@@ -13396,9 +14065,12 @@ sub default_login_domain {
 }
 
 sub shared_institution {
-    my ($dom) = @_;
+    my ($dom,$lonhost) = @_;
+    if ($lonhost eq '') {
+        $lonhost = $perlvar{'lonHostID'};
+    }
     my $same_intdom;
-    my $hostintdom = &internet_dom($perlvar{'lonHostID'});
+    my $hostintdom = &internet_dom($lonhost);
     if ($hostintdom ne '') {
         my %iphost = &get_iphost();
         my $primary_id = &domain($dom,'primary');
@@ -13455,6 +14127,230 @@ 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 = &Apache::lonnet::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 $dom = &Apache::lonnet::host_domain($lonid);
+        if ($dom ne '') {
+            my $cachetime = 60*60*24;
+            my %domconfig =
+                &Apache::lonnet::get_dom('configuration',['wafproxy'],$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 $dom = &Apache::lonnet::host_domain($lonid);
+        if ($dom ne '') {
+            my $cachetime = 60*60*24;
+            my %domconfig =
+                &Apache::lonnet::get_dom('configuration',['wafproxy'],$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 (&Apache::lonnet::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 $dom = &Apache::lonnet::host_domain($lonid);
+    if ($dom ne '') {
+        my $cachetime = 60*60*24;
+        my %domconfig =
+            &Apache::lonnet::get_dom('configuration',['login'],$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 {
@@ -13594,13 +14490,25 @@ sub get_dns {
     }
     while (%alldns) {
 	my ($dns) = sort { $b cmp $a } keys(%alldns);
-	my $ua=new LWP::UserAgent;
-        $ua->timeout(30);
-	my $request=new HTTP::Request('GET',"$alldns{$dns}://$dns$url");
-	my $response=$ua->request($request);
-        delete($alldns{$dns});
-	next if ($response->is_error());
-	my @content = split("\n",$response->content);
+        my @content;
+        if ($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);
+            }
+        } else {
+	    my $ua=new LWP::UserAgent;
+            $ua->timeout(30);
+	    my $request=new HTTP::Request('GET',"$alldns{$dns}://$dns$url");
+	    my $response=$ua->request($request);
+            delete($alldns{$dns});
+	    next if ($response->is_error());
+	    @content = split("\n",$response->content);
+        }
         unless ($nocache) {
 	    &do_cache_new('dns',$url,\@content,30*24*60*60);
         }
@@ -13672,6 +14580,21 @@ sub fetch_dns_checksums {
     return \%checksums;
 }
 
+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",
+    }
+    return ($dir,$file);
+}
+
 # ------------------------------------------------------------ Read domain file
 {
     my $loaded;
@@ -14551,6 +15474,7 @@ prevents recursive calls to &allowed.
  2: browse allowed
  A: passphrase authentication needed
  B: access temporarily blocked because of a blocking event in a course.
+ D: access blocked because access is required via session initiated via deep-link
 
 =item *
 
@@ -14843,10 +15767,6 @@ 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