--- loncom/lond	2021/06/20 16:24:09	1.489.2.41
+++ loncom/lond	2017/05/23 01:31:03	1.537
@@ -2,7 +2,7 @@
 # The LearningOnline Network
 # lond "LON Daemon" Server (port "LOND" 5663)
 #
-# $Id: lond,v 1.489.2.41 2021/06/20 16:24:09 raeburn Exp $
+# $Id: lond,v 1.537 2017/05/23 01:31:03 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -35,12 +35,13 @@ use LONCAPA;
 use LONCAPA::Configuration;
 use LONCAPA::Lond;
 
+use Socket;
 use IO::Socket;
 use IO::File;
 #use Apache::File;
 use POSIX;
 use Crypt::IDEA;
-use LWP::UserAgent();
+use HTTP::Request;
 use Digest::MD5 qw(md5_hex);
 use GDBM_File;
 use Authen::Krb5;
@@ -57,13 +58,14 @@ use Mail::Send;
 use Crypt::Eksblowfish::Bcrypt;
 use Digest::SHA;
 use Encode;
+use LONCAPA::LWPReq;
 
 my $DEBUG = 0;		       # Non zero to enable debug log entries.
 
 my $status='';
 my $lastlog='';
 
-my $VERSION='$Revision: 1.489.2.41 $'; #' stupid emacs
+my $VERSION='$Revision: 1.537 $'; #' stupid emacs
 my $remoteVERSION;
 my $currenthostid="default";
 my $currentdomainid;
@@ -73,8 +75,16 @@ my $clientip;			# IP address of client.
 my $clientname;			# LonCAPA name of client.
 my $clientversion;              # LonCAPA version running on client.
 my $clienthomedom;              # LonCAPA domain of homeID for client. 
-                                # primary library server. 
-
+my $clientintdom;               # LonCAPA "internet domain" for client.
+my $clientsamedom;              # LonCAPA domain same for this host 
+                                # and client.
+my $clientsameinst;             # LonCAPA "internet domain" same for 
+                                # this host and client.
+my $clientremoteok;             # Client allowed to host domain's users.
+                                # (version constraints ignored), not set
+                                # if this host and client share "internet domain". 
+my %clientprohibited;           # Actions prohibited on client;
+ 
 my $server;
 
 my $keymode;
@@ -95,6 +105,9 @@ my %managers;			# Ip -> manager names
 
 my %perlvar;			# Will have the apache conf defined perl vars.
 
+my %secureconf;                 # Will have requirements for security 
+                                # of lond connections
+
 my $dist;
 
 #
@@ -144,6 +157,157 @@ my @installerrors = ("ok",
 		     );
 
 #
+# The %trust hash classifies commands according to type of trust 
+# required for execution of the command.
+#
+# When clients from a different institution request execution of a
+# particular command, the trust settings for that institution set
+# for this domain (or default domain for a multi-domain server) will
+# be checked to see if running the command is allowed.
+#
+# Trust types which depend on the "Trust" domain configuration
+# for the machine's default domain are:
+#
+# content   ("Access to this domain's content by others")
+# shared    ("Access to other domain's content by this domain")
+# enroll    ("Enrollment in this domain's courses by others")
+# coaurem   ("Co-author roles for this domain's users elsewhere")
+# domroles  ("Domain roles in this domain assignable to others")
+# catalog   ("Course Catalog for this domain displayed elsewhere")
+# reqcrs    ("Requests for creation of courses in this domain by others")
+# msg       ("Users in other domains can send messages to this domain")
+# 
+# Trust type which depends on the User Session Hosting (remote) 
+# domain configuration for machine's default domain is: "remote".
+#
+# Trust types which depend on contents of manager.tab in 
+# /home/httpd/lonTabs is: "manageronly".
+# 
+# Trust type which requires client to share the same LON-CAPA
+# "internet domain" (i.e., same institution as this server) is:
+# "institutiononly".
+#
+
+my %trust = (
+               auth => {remote => 1},
+               autocreatepassword => {remote => 1},
+               autocrsreqchecks => {remote => 1, reqcrs => 1},
+               autocrsrequpdate => {remote => 1},
+               autocrsreqvalidation => {remote => 1},
+               autogetsections => {remote => 1},
+               autoinstcodedefaults => {remote => 1, catalog => 1},
+               autoinstcodeformat => {remote => 1, catalog => 1},
+               autonewcourse => {remote => 1, reqcrs => 1},
+               autophotocheck => {remote => 1, enroll => 1},
+               autophotochoice => {remote => 1},
+               autophotopermission => {remote => 1, enroll => 1},
+               autopossibleinstcodes => {remote => 1, reqcrs => 1},
+               autoretrieve => {remote => 1, enroll => 1, catalog => 1},
+               autorun => {remote => 1, enroll => 1, reqcrs => 1},
+               autovalidateclass_sec => {catalog => 1},
+               autovalidatecourse => {remote => 1, enroll => 1},
+               autovalidateinstcode => {domroles => 1, remote => 1, enroll => 1},
+               changeuserauth => {remote => 1, domroles => 1},
+               chatretr => {remote => 1, enroll => 1},
+               chatsend => {remote => 1, enroll => 1},
+               courseiddump => {remote => 1, domroles => 1, enroll => 1},
+               courseidput => {remote => 1, domroles => 1, enroll => 1},
+               courseidputhash => {remote => 1, domroles => 1, enroll => 1},
+               courselastaccess => {remote => 1, domroles => 1, enroll => 1},
+               currentauth => {remote => 1, domroles => 1, enroll => 1},
+               currentdump => {remote => 1, enroll => 1},
+               currentversion => {remote=> 1, content => 1},
+               dcmaildump => {remote => 1, domroles => 1},
+               dcmailput => {remote => 1, domroles => 1},
+               del => {remote => 1, domroles => 1, enroll => 1, content => 1},
+               deldom => {remote => 1, domroles => 1}, # not currently used
+               devalidatecache => {institutiononly => 1},
+               domroleput => {remote => 1, enroll => 1},
+               domrolesdump => {remote => 1, catalog => 1},
+               du => {remote => 1, enroll => 1},
+               du2 => {remote => 1, enroll => 1},
+               dump => {remote => 1, enroll => 1, domroles => 1},
+               edit => {institutiononly => 1},  #not used currently
+               eget => {remote => 1, domroles => 1, enroll => 1}, #not used currently
+               egetdom => {remote => 1, domroles => 1, enroll => 1, },
+               ekey => {}, #not used currently
+               exit => {anywhere => 1},
+               fetchuserfile => {remote => 1, enroll => 1},
+               get => {remote => 1, domroles => 1, enroll => 1},
+               getdom => {anywhere => 1},
+               home => {anywhere => 1},
+               iddel => {remote => 1, enroll => 1},
+               idget => {remote => 1, enroll => 1},
+               idput => {remote => 1, domroles => 1, enroll => 1},
+               inc => {remote => 1, enroll => 1},
+               init => {anywhere => 1},
+               inst_usertypes => {remote => 1, domroles => 1, enroll => 1},
+               instemailrules => {remote => 1, domroles => 1},
+               instidrulecheck => {remote => 1, domroles => 1,},
+               instidrules => {remote => 1, domroles => 1,},
+               instrulecheck => {remote => 1, enroll => 1, reqcrs => 1, domroles => 1},
+               instselfcreatecheck => {institutiononly => 1},
+               instuserrules => {remote => 1, enroll => 1, reqcrs => 1, domroles => 1},
+               keys => {remote => 1,},
+               load => {anywhere => 1},
+               log => {anywhere => 1},
+               ls => {remote => 1, enroll => 1, content => 1,},
+               ls2 => {remote => 1, enroll => 1, content => 1,},
+               ls3 => {remote => 1, enroll => 1, content => 1,},
+               makeuser => {remote => 1, enroll => 1, domroles => 1,},
+               mkdiruserfile => {remote => 1, enroll => 1,},
+               newput => {remote => 1, enroll => 1, reqcrs => 1, domroles => 1,},
+               passwd => {remote => 1},
+               ping => {anywhere => 1},
+               pong => {anywhere => 1},
+               pushfile => {manageronly => 1},
+               put => {remote => 1, enroll => 1, domroles => 1, msg => 1, content => 1, shared => 1},
+               putdom => {remote => 1, domroles => 1,},
+               putstore => {remote => 1, enroll => 1},
+               queryreply => {anywhere => 1},
+               querysend => {anywhere => 1},
+               querysend_activitylog => {remote => 1},
+               querysend_allusers => {remote => 1, domroles => 1},
+               querysend_courselog => {remote => 1},
+               querysend_fetchenrollment => {remote => 1},
+               querysend_getinstuser => {remote => 1},
+               querysend_getmultinstusers => {remote => 1},
+               querysend_instdirsearch => {remote => 1, domroles => 1, coaurem => 1},
+               querysend_institutionalphotos => {remote => 1},
+               querysend_portfolio_metadata => {remote => 1, content => 1},
+               querysend_userlog => {remote => 1, domroles => 1},
+               querysend_usersearch => {remote => 1, enroll => 1, coaurem => 1},
+               quit => {anywhere => 1},
+               readlonnetglobal => {institutiononly => 1},
+               reinit => {manageronly => 1}, #not used currently
+               removeuserfile => {remote => 1, enroll => 1},
+               renameuserfile => {remote => 1,},
+               restore => {remote => 1, enroll => 1, reqcrs => 1,},
+               rolesdel => {remote => 1, enroll => 1, domroles => 1, coaurem => 1},
+               rolesput => {remote => 1, enroll => 1, domroles => 1, coaurem => 1},
+               servercerts => {institutiononly => 1},
+               serverdistarch => {anywhere => 1},
+               serverhomeID => {anywhere => 1},
+               serverloncaparev => {anywhere => 1},
+               servertimezone => {remote => 1, enroll => 1},
+               setannounce => {remote => 1, domroles => 1},
+               sethost => {anywhere => 1},
+               store => {remote => 1, enroll => 1, reqcrs => 1,},
+               studentphoto => {remote => 1, enroll => 1},
+               sub => {content => 1,},
+               tmpdel => {anywhere => 1},
+               tmpget => {anywhere => 1},
+               tmpput => {anywhere => 1},
+               tokenauthuserfile => {anywhere => 1},
+               unsub => {content => 1,},
+               update => {shared => 1},
+               updateclickers => {remote => 1},
+               userhassession => {anywhere => 1},
+               userload => {anywhere => 1},
+               version => {anywhere => 1}, #not used
+            );
+
+#
 #   Statistics that are maintained and dislayed in the status line.
 #
 my $Transactions = 0;		# Number of attempted transactions.
@@ -299,8 +463,23 @@ sub InsecureConnection {
     my $Socket  =  shift;
 
     #   Don't even start if insecure connections are not allowed.
-
-    if(! $perlvar{londAllowInsecure}) {	# Insecure connections not allowed.
+    #   return 0 if Insecure connections not allowed.
+    #
+    if (ref($secureconf{'connfrom'}) eq 'HASH') {
+        if ($clientsamedom) {
+            if ($secureconf{'connfrom'}{'dom'} eq 'req') {
+                return 0;
+            } 
+        } elsif ($clientsameinst) {
+            if ($secureconf{'connfrom'}{'intdom'} eq 'req') {
+                return 0;
+            }
+        } else {
+            if ($secureconf{'connfrom'}{'other'} eq 'req') {
+                return 0;
+            }
+        }
+    } elsif (!$perlvar{londAllowInsecure}) {
 	return 0;
     }
 
@@ -666,10 +845,8 @@ sub PushFile {
                 $clientprotocol = 'http' if ($clientprotocol ne 'https');
                 my $url = '/adm/'.$filename;
                 $url =~ s{_}{/};
-                my $ua=new LWP::UserAgent;
-                $ua->timeout(60);
                 my $request=new HTTP::Request('GET',"$clientprotocol://$clienthost$url");
-                my $response=$ua->request($request);
+                my $response = LONCAPA::LWPReq::makerequest($clientname,$request,'',\%perlvar,60,0);
                 if ($response->is_error()) {
                     &logthis('<font color="red"> Pushfile: unable to install '
                             .$tablefile." - error attempting to pull data. </font>");
@@ -1429,14 +1606,12 @@ sub du2_handler {
 #
 #    1. for a directory, and the path does not begin with one of:
 #        (a) /home/httpd/html/res/<domain>
-#        (b) /home/httpd/html/userfiles/
+#        (b) /home/httpd/html/res/userfiles/
 #        (c) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/userfiles
 #    or is:
 #
-#    2. for a file, and the path (after prepending) does not begin with one of:
-#        (a) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/
-#        (b) /home/httpd/html/res/<domain>/<username>/
-#        (c) /home/httpd/html/userfiles/<domain>/<username>/
+#    2. for a file, and the path (after prepending) does not begin with:
+#    /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/
 #
 #    the response will be "refused".
 #
@@ -1467,8 +1642,8 @@ sub ls_handler {
     }
     if (-e $ulsdir) {
 	if(-d $ulsdir) {
-            unless (($ulsdir =~ m{^/home/httpd/html/(res/$LONCAPA::match_domain|userfiles/)}) ||
-                    ($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/userfiles})) {
+            unless (($ulsdir =~ m{/home/httpd/html/(res/$LONCAPA::match_domain|userfiles/)}) ||
+                    ($ulsdir =~ m{/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_username/userfiles/})) {
                 &Failure($client,"refused\n",$userinput);
                 return 1;
             }
@@ -1495,8 +1670,7 @@ sub ls_handler {
 		closedir(LSDIR);
 	    }
 	} else {
-            unless (($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/}) ||
-                    ($ulsdir =~ m{^/home/httpd/html/(?:res|userfiles)/$LONCAPA::match_domain/$LONCAPA::match_name/})) { 
+            unless ($ulsdir =~ m{/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_username/}) {
                 &Failure($client,"refused\n",$userinput);
                 return 1;
             }
@@ -1529,14 +1703,12 @@ sub ls_handler {
 #
 #    1. for a directory, and the path does not begin with one of:
 #        (a) /home/httpd/html/res/<domain>
-#        (b) /home/httpd/html/userfiles/
+#        (b) /home/httpd/html/res/userfiles/
 #        (c) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/userfiles
 #    or is:
 #
-#    2. for a file, and the path (after prepending) does not begin with one of:
-#        (a) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/
-#        (b) /home/httpd/html/res/<domain>/<username>/
-#        (c) /home/httpd/html/userfiles/<domain>/<username>/
+#    2. for a file, and the path (after prepending) does not begin with:
+#    /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/
 #
 #    the response will be "refused".
 #
@@ -1566,8 +1738,8 @@ sub ls2_handler {
     }
     if (-e $ulsdir) {
         if(-d $ulsdir) {
-            unless (($ulsdir =~ m{^/home/httpd/html/(res/$LONCAPA::match_domain|userfiles/)}) ||
-                    ($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/userfiles})) {
+            unless (($ulsdir =~ m{/home/httpd/html/(res/$LONCAPA::match_domain|userfiles/)}) ||
+                    ($ulsdir =~ m{/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_username/userfiles/})) {
                 &Failure($client,"refused\n","$userinput");
                 return 1;
             }
@@ -1595,8 +1767,7 @@ sub ls2_handler {
                 closedir(LSDIR);
             }
         } else {
-            unless (($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/}) ||
-                    ($ulsdir =~ m{^/home/httpd/html/(?:res|userfiles)/$LONCAPA::match_domain/$LONCAPA::match_name/})) {
+            unless ($ulsdir =~ m{/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_username/}) {
                 &Failure($client,"refused\n",$userinput);
                 return 1;
             }
@@ -1621,17 +1792,14 @@ sub ls2_handler {
 #
 #    1. for a directory, and the path does not begin with one of:
 #        (a) /home/httpd/html/res/<domain>
-#        (b) /home/httpd/html/userfiles/
+#        (b) /home/httpd/html/res/userfiles/
 #        (c) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/userfiles
-#        (d) /home/httpd/html/priv/<domain> and client is the homeserver
+#        (d) /home/httpd/html/priv/<domain>/ and client is the homeserver
 #
 #    or is:
 #
-#    2. for a file, and the path (after prepending) does not begin with one of:
-#        (a) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/
-#        (b) /home/httpd/html/res/<domain>/<username>/
-#        (c) /home/httpd/html/userfiles/<domain>/<username>/
-#        (d) /home/httpd/html/priv/<domain>/<username>/ and client is the homeserver
+#    2. for a file, and the path (after prepending) does not begin with:
+#    /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/
 #
 #    the response will be "refused".
 #
@@ -1708,9 +1876,9 @@ sub ls3_handler {
     if (-e $ulsdir) {
         if(-d $ulsdir) {
             unless (($getpropath) || ($getuserdir) ||
-                    ($ulsdir =~ m{^/home/httpd/html/(res/$LONCAPA::match_domain|userfiles/)}) ||
-                    ($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/userfiles}) ||
-                    (($ulsdir =~ m{^/home/httpd/html/priv/$LONCAPA::match_domain}) && ($islocal))) {
+                    ($ulsdir =~ m{/home/httpd/html/(res/$LONCAPA::match_domain|userfiles/)}) ||
+                    ($ulsdir =~ m{/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_username/userfiles/}) ||
+                    (($ulsdir =~ m{/home/httpd/html/priv/$LONCAPA::match_domain/}) && ($islocal))) {
                 &Failure($client,"refused\n",$userinput);
                 return 1;
             }
@@ -1739,9 +1907,7 @@ sub ls3_handler {
             }
         } else {
             unless (($getpropath) || ($getuserdir) ||
-                    ($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/}) ||
-                    ($ulsdir =~ m{^/home/httpd/html/(?:res|userfiles)/$LONCAPA::match_domain/$LONCAPA::match_name/}) ||
-                    (($ulsdir =~ m{^/home/httpd/html/priv/$LONCAPA::match_domain/$LONCAPA::match_name/}) && ($islocal))) {
+                    ($ulsdir =~ m{/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_username/})) {
                 &Failure($client,"refused\n",$userinput);
                 return 1;
             }
@@ -1768,15 +1934,17 @@ sub read_lonnet_global {
                       );
     my %limit_to = (
                     perlvar => {
-                                 lonOtherAuthen => 1,
-                                 lonBalancer    => 1,
-                                 lonVersion     => 1,
-                                 lonSysEMail    => 1,
-                                 lonHostID      => 1,
-                                 lonRole        => 1,
-                                 lonDefDomain   => 1,
-                                 lonLoadLim     => 1,
-                                 lonUserLoadLim => 1,
+                                 lonOtherAuthen  => 1,
+                                 lonBalancer     => 1,
+                                 lonVersion      => 1,
+                                 lonAdmEMail     => 1,
+                                 lonSupportEMail => 1,  
+                                 lonSysEMail     => 1,
+                                 lonHostID       => 1,
+                                 lonRole         => 1,
+                                 lonDefDomain    => 1,
+                                 lonLoadLim      => 1,
+                                 lonUserLoadLim  => 1,
                                }
                   );
     if (ref($requested) eq 'HASH') {
@@ -1795,7 +1963,7 @@ sub read_lonnet_global {
                 }
                 if ($what eq 'perlvar') {
                     if (!exists($packagevars{$what}{'lonBalancer'})) {
-                        if ($dist =~ /^(centos|rhes|fedora|scientific|oracle)/) {
+                        if ($dist =~ /^(centos|rhes|fedora|scientific)/) {
                             my $othervarref=LONCAPA::Configuration::read_conf('httpd.conf');
                             if (ref($othervarref) eq 'HASH') {
                                 $items->{'lonBalancer'} = $othervarref->{'lonBalancer'};
@@ -1888,6 +2056,16 @@ sub server_distarch_handler {
 }
 &register_handler("serverdistarch", \&server_distarch_handler, 0, 1, 0);
 
+sub server_certs_handler {
+    my ($cmd,$tail,$client) = @_;
+    my $userinput = "$cmd:$tail";
+    my $result;
+    my $result = &LONCAPA::Lond::server_certs(\%perlvar);
+    &Reply($client,\$result,$userinput);
+    return;
+}
+&register_handler("servercerts", \&server_certs_handler, 0, 1, 0);
+
 #   Process a reinit request.  Reinit requests that either
 #   lonc or lond be reinitialized so that an updated 
 #   host.tab or domain.tab can be processed.
@@ -2026,12 +2204,8 @@ sub authenticate_handler {
                 if (ref($hostedsession) eq 'HASH') {
                     $hosted = $hostedsession->{'hosted'};
                 }
-                my $loncaparev = $clientversion;
-                if ($loncaparev eq '') {
-                    $loncaparev = $Apache::lonnet::loncaparevs{$clientname};
-                }
                 $canhost = &Apache::lonnet::can_host_session($udom,$clientname,
-                                                             $loncaparev,
+                                                             $clientversion,
                                                              $remote,$hosted);
             }
         }
@@ -2107,84 +2281,12 @@ sub change_password_handler {
     }
     if($validated) {
 	my $realpasswd  = &get_auth_type($udom, $uname); # Defined since authd.
+	
 	my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
-        my $notunique;
 	if ($howpwd eq 'internal') {
 	    &Debug("internal auth");
             my $ncpass = &hash_passwd($udom,$npass);
-            my (undef,$method,@rest) = split(/!/,$contentpwd);
-            if ($method eq 'bcrypt') {
-                my %passwdconf = &Apache::lonnet::get_passwdconf($udom);
-                if (($passwdconf{'numsaved'}) && ($passwdconf{'numsaved'} =~ /^\d+$/)) {
-                    my @oldpasswds;
-                    my $userpath = &propath($udom,$uname);
-                    my $fullpath = $userpath.'/oldpasswds';
-                    if (-d $userpath) {
-                        my @oldfiles;
-                        if (-e $fullpath) {
-                            if (opendir(my $dir,$fullpath)) {
-                                (@oldfiles) = grep(/^\d+$/,readdir($dir));
-                                closedir($dir);
-                            }
-                            if (@oldfiles) {
-                                @oldfiles = sort { $b <=> $a } (@oldfiles);
-                                my $numremoved = 0;
-                                for (my $i=0; $i<@oldfiles; $i++) {
-                                    if ($i>=$passwdconf{'numsaved'}) {
-                                        if (-f "$fullpath/$oldfiles[$i]") {
-                                            if (unlink("$fullpath/$oldfiles[$i]")) {
-                                                $numremoved ++;
-                                            }
-                                        }
-                                    } elsif (open(my $fh,'<',"$fullpath/$oldfiles[$i]")) {
-                                        while (my $line = <$fh>) {
-                                            push(@oldpasswds,$line);
-                                        }
-                                        close($fh);
-                                    }
-                                }
-                                if ($numremoved) {
-                                    &logthis("unlinked $numremoved old password files for $uname:$udom");
-                                }
-                            }
-                        }
-                        push(@oldpasswds,$contentpwd);
-                        foreach my $item (@oldpasswds) {
-                            my (undef,$method,@rest) = split(/!/,$item);
-                            if ($method eq 'bcrypt') {
-                                my $result = &hash_passwd($udom,$npass,@rest);
-                                if ($result eq $item) {
-                                    $notunique = 1;
-                                    last;
-                                }
-                            }
-                        }
-                        unless ($notunique) {
-                            unless (-e $fullpath) {
-                                if (&mkpath("$fullpath/")) {
-                                    chmod(0700,$fullpath);
-                                }
-                            }
-                            if (-d $fullpath) {
-                                my $now = time;
-                                if (open(my $fh,'>',"$fullpath/$now")) {
-                                    print $fh $contentpwd;
-                                    close($fh);
-                                    chmod(0400,"$fullpath/$now");
-                                }
-                            }
-                        }
-                    }
-                }
-            }
-            if ($notunique) {
-                my $msg="Result of password change for $uname:$udom - password matches one used before";
-                if ($lonhost) {
-                    $msg .= " - request originated from: $lonhost";
-                }
-                &logthis($msg);
-                &Reply($client, "prioruse\n", $userinput);
-	    } elsif (&rewrite_password_file($udom, $uname, "internal:$ncpass")) {
+	    if(&rewrite_password_file($udom, $uname, "internal:$ncpass")) {
 		my $msg="Result of password change for $uname: pwchange_success";
                 if ($lonhost) {
                     $msg .= " - request originated from: $lonhost";
@@ -2201,7 +2303,7 @@ sub change_password_handler {
 	    my $result = &change_unix_password($uname, $npass);
             if ($result eq 'ok') {
                 &update_passwd_history($uname,$udom,$howpwd,$context);
-            }
+             }
 	    &logthis("Result of password change for $uname: ".
 		     $result);
 	    &Reply($client, \$result, $userinput);
@@ -2212,6 +2314,7 @@ sub change_password_handler {
 	    #
 	    &Failure( $client, "auth_mode_error\n", $userinput);
 	}  
+	
     } else {
 	if ($failure eq '') {
 	    $failure = 'non_authorized';
@@ -2368,7 +2471,7 @@ sub change_authentication_handler {
 		my $result = &change_unix_password($uname, $npass);
 		&logthis("Result of password change for $uname: ".$result);
 		if ($result eq "ok") {
-                    &update_passwd_history($uname,$udom,$umode,'changeuserauth');
+                    &update_passwd_history($uname,$udom,$umode,'changeuserauth'); 
 		    &Reply($client, \$result);
 		} else {
 		    &Failure($client, \$result);
@@ -2488,38 +2591,22 @@ sub update_resource_handler {
 		my $transname="$fname.in.transfer";
 		my $remoteurl=&Apache::lonnet::reply("sub:$fname","$clientname");
 		my $response;
-# FIXME: cannot replicate files that take more than two minutes to transfer?
-#		alarm(120);
-# FIXME: this should use the LWP mechanism, not internal alarms.
-                alarm(1200);
-		{
-		    my $ua=new LWP::UserAgent;
-		    my $request=new HTTP::Request('GET',"$remoteurl");
-		    $response=$ua->request($request,$transname);
-		}
-		alarm(0);
+# FIXME: cannot replicate files that take more than two minutes to transfer -- needs checking now 1200s timeout used
+# for LWP request.
+		my $request=new HTTP::Request('GET',"$remoteurl");
+                $response=&LONCAPA::LWPReq::makerequest($clientname,$request,$transname,\%perlvar,1200,0,1);
 		if ($response->is_error()) {
-                    my $reply=&Apache::lonnet::reply("unsub:$fname","$clientname");
-                    &devalidate_meta_cache($fname);
-                    if (-e $transname) {
-                        unlink($transname);
-                    }
-                    unlink($fname);
+# FIXME: we should probably clean up here instead of just whine
+		    unlink($transname);
 		    my $message=$response->status_line;
 		    &logthis("LWP GET: $message for $fname ($remoteurl)");
 		} else {
 		    if ($remoteurl!~/\.meta$/) {
-# FIXME: isn't there an internal LWP mechanism for this?
-			alarm(120);
-			{
-			    my $ua=new LWP::UserAgent;
-			    my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
-			    my $mresponse=$ua->request($mrequest,$fname.'.meta');
-			    if ($mresponse->is_error()) {
-				unlink($fname.'.meta');
-			    }
+			my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
+                        my $mresponse = &LONCAPA::LWPReq::makerequest($clientname,$mrequest,$fname.'.meta',\%perlvar,120,0,1);
+			if ($mresponse->is_error()) {
+			    unlink($fname.'.meta');
 			}
-			alarm(0);
 		    }
                     # we successfully transfered, copy file over to real name
 		    rename($transname,$fname);
@@ -2589,13 +2676,13 @@ sub fetch_user_file_handler {
 	my $remoteurl=$clientprotocol.'://'.$clienthost.'/userfiles/'.$fname;
 	my $response;
 	Debug("Remote URL : $remoteurl Transfername $transname Destname: $destname");
-	alarm(120);
-	{
-	    my $ua=new LWP::UserAgent;
-	    my $request=new HTTP::Request('GET',"$remoteurl");
-	    $response=$ua->request($request,$transname);
-	}
-	alarm(0);
+	my $request=new HTTP::Request('GET',"$remoteurl");
+        my $verifycert = 1;
+        my @machine_ids = &Apache::lonnet::current_machine_ids();
+        if (grep(/^\Q$clientname\E$/,@machine_ids)) {
+            $verifycert = 0;
+        }
+        $response = &LONCAPA::LWPReq::makerequest($clientname,$request,$transname,\%perlvar,1200,$verifycert);
 	if ($response->is_error()) {
 	    unlink($transname);
 	    my $message=$response->status_line;
@@ -2662,13 +2749,13 @@ sub remove_user_file_handler {
 	    if (-e $file) {
 		#
 		#   If the file is a regular file unlink is fine...
-		#   However it's possible the client wants a dir
-		#   removed, in which case rmdir is more appropriate
-	        #   Note: rmdir will only remove an empty directory.
+		#   However it's possible the client wants a dir 
+		#   removed, in which case rmdir is more appropriate.
+		#   Note: rmdir will only remove an empty directory.
 		#
 	        if (-f $file){
 		    unlink($file);
-                    # for html files remove the associated .bak file
+                    # for html files remove the associated .bak file 
                     # which may have been created by the editor.
                     if ($ufile =~ m{^((docs|supplemental)/(?:\d+|default)/\d+(?:|/.+)/)[^/]+\.x?html?$}i) {
                         my $path = $1;
@@ -3042,8 +3129,8 @@ sub newput_user_profile_entry {
                 &logthis("error: ".($!+0)." untie (GDBM) failed ".
                          "while attempting newput - early out as key exists");
             }
-	    &Failure($client, "key_exists: ".$key."\n",$userinput);
-	    return 1;
+            &Failure($client, "key_exists: ".$key."\n",$userinput);
+            return 1;
 	}
     }
 
@@ -3446,6 +3533,17 @@ sub get_profile_keys {
 sub dump_profile_database {
     my ($cmd, $tail, $client) = @_;
 
+    my $res = LONCAPA::Lond::dump_profile_database($tail);
+
+    if ($res =~ /^error:/) {
+        Failure($client, \$res, "$cmd:$tail");
+    } else {
+        Reply($client, \$res, "$cmd:$tail");
+    }
+
+    return 1;  
+
+    #TODO remove 
     my $userinput = "$cmd:$tail";
    
     my ($udom,$uname,$namespace) = split(/:/,$tail);
@@ -3525,11 +3623,11 @@ sub dump_with_regexp {
     my ($cmd, $tail, $client) = @_;
 
     my $res = LONCAPA::Lond::dump_with_regexp($tail, $clientversion);
-
+    
     if ($res =~ /^error:/) {
-        &Failure($client, \$res, "$cmd:$tail");
+        Failure($client, \$res, "$cmd:$tail");
     } else {
-        &Reply($client, \$res, "$cmd:$tail");
+        Reply($client, \$res, "$cmd:$tail");
     }
 
     return 1;
@@ -3567,7 +3665,6 @@ sub store_handler {
     my ($cmd, $tail, $client) = @_;
  
     my $userinput = "$cmd:$tail";
-
     chomp($tail);
     my ($udom,$uname,$namespace,$rid,$what,$laststore) =split(/:/,$tail);
     if ($namespace ne 'roles') {
@@ -3597,7 +3694,6 @@ sub store_handler {
                     $numtrans =~ s/D//g;
                 }
             }
-
 	    $hashref->{"version:$rid"}++;
 	    my $version=$hashref->{"version:$rid"};
 	    my $allkeys=''; 
@@ -3614,7 +3710,7 @@ sub store_handler {
                 if ($numtrans) {
                     $msg = 'delay:'.$numtrans;
                 }
-                &Reply($client, "$msg\n", $userinput);
+		&Reply($client, "$msg\n", $userinput);
 	    } else {
 		&Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
 			"while attempting store\n", $userinput);
@@ -3857,7 +3953,7 @@ sub retrieve_chat_handler {
 #  serviced.
 #
 #  Parameters:
-#     $cmd       - COmmand keyword that initiated the request.
+#     $cmd       - Command keyword that initiated the request.
 #     $tail      - Remainder of the command after the keyword.
 #                  For this function, this consists of a query and
 #                  3 arguments that are self-documentingly labelled
@@ -3871,7 +3967,6 @@ sub retrieve_chat_handler {
 sub send_query_handler {
     my ($cmd, $tail, $client) = @_;
 
-
     my $userinput = "$cmd:$tail";
 
     my ($query,$arg1,$arg2,$arg3)=split(/\:/,$tail);
@@ -4162,7 +4257,7 @@ sub put_course_id_hash_handler {
 #
 #                 domcloner - flag to indicate if user can create CCs in course's domain.
 #                             If so, ability to clone course is automatic.
-#                 hasuniquecode - filter by courses for which a six character unique code has
+#                 hasuniquecode - filter by courses for which a six character unique code has 
 #                                 been set.
 #
 #     $client  - The socket open on the client.
@@ -4172,6 +4267,17 @@ sub put_course_id_hash_handler {
 #   a reply is written to $client.
 sub dump_course_id_handler {
     my ($cmd, $tail, $client) = @_;
+
+    my $res = LONCAPA::Lond::dump_course_id_handler($tail);
+    if ($res =~ /^error:/) {
+        Failure($client, \$res, "$cmd:$tail");
+    } else {
+        Reply($client, \$res, "$cmd:$tail");
+    }
+
+    return 1;  
+
+    #TODO remove
     my $userinput = "$cmd:$tail";
 
     my ($udom,$since,$description,$instcodefilter,$ownerfilter,$coursefilter,
@@ -4576,44 +4682,6 @@ sub course_lastaccess_handler {
 }
 &register_handler("courselastaccess",\&course_lastaccess_handler, 0, 1, 0);
 
-sub course_sessions_handler {
-    my ($cmd, $tail, $client) = @_;
-    my $userinput = "$cmd:$tail";
-    my ($cdom,$cnum,$lastactivity) = split(':',$tail);
-    my $dbsuffix = '_'.$cdom.'_'.$cnum.'.db';
-    my (%sessions,$qresult);
-    my $now=time;
-    if (opendir(DIR,$perlvar{'lonIDsDir'})) {
-        my $filename;
-        while ($filename=readdir(DIR)) {
-            next if ($filename=~/^\./);
-            next if ($filename=~/^publicuser_/);
-            next if ($filename=~/^[a-f0-9]+_(linked|lti_\d+)\.id$/);
-            if ($filename =~ /^($LONCAPA::match_username)_\d+_($LONCAPA::match_domain)_/) {
-                my ($uname,$udom) = ($1,$2);
-                next unless (-e "$perlvar{'lonDaemons'}/tmp/$uname$dbsuffix");
-                my $mtime = (stat("$perlvar{'lonIDsDir'}/$filename"))[9];
-                if ($lastactivity < 0) {
-                    next if ($mtime-$now > $lastactivity);
-                } else {
-                    next if ($now-$mtime > $lastactivity);
-                }
-                $sessions{$uname.':'.$udom} = $mtime;
-            }
-        }
-        closedir(DIR);
-    }
-    foreach my $user (keys(%sessions)) {
-        $qresult.=&escape($user).'='.$sessions{$user}.'&';
-    }
-    if ($qresult) {
-        chop($qresult);
-    }
-    &Reply($client, \$qresult, $userinput);
-    return 1;
-}
-&register_handler("coursesessions",\&course_sessions_handler, 0, 1, 0);
-
 #
 # Puts an unencrypted entry in a namespace db file at the domain level 
 #
@@ -4657,12 +4725,128 @@ sub put_domain_handler {
 }
 &register_handler("putdom", \&put_domain_handler, 0, 1, 0);
 
+# Updates one or more entries in clickers.db file at the domain level
+#
+# Parameters:
+#    $cmd      - The command that got us here.
+#    $tail     - Tail of the command (remaining parameters).
+#                In this case a colon separated list containing:
+#                (a) the domain for which we are updating the entries,
+#                (b) the action required -- add or del -- and
+#                (c) a &-separated list of entries to add or delete.
+#    $client   - File descriptor connected to client.
+# Returns
+#     1        - Continue processing.
+#     0        - Requested to exit, caller should shut down.
+#  Side effects:
+#     reply is written to $client.
+#
+
+
+sub update_clickers {
+    my ($cmd, $tail, $client)  = @_;
+
+    my $userinput = "$cmd:$tail";
+    my ($udom,$action,$what) =split(/:/,$tail,3);
+    chomp($what);
+
+    my $hashref = &tie_domain_hash($udom, "clickers", &GDBM_WRCREAT(),
+                                 "U","$action:$what");
+
+    if (!$hashref) {
+        &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
+                  "while attempting updateclickers\n", $userinput);
+        return 1;
+    }
+
+    my @pairs=split(/\&/,$what);
+    foreach my $pair (@pairs) {
+        my ($key,$value)=split(/=/,$pair);
+        if ($action eq 'add') {
+            if (exists($hashref->{$key})) {
+                my @newvals = split(/,/,&unescape($value));
+                my @currvals = split(/,/,&unescape($hashref->{$key}));
+                my @merged = sort(keys(%{{map { $_ => 1 } (@newvals,@currvals)}}));
+                $hashref->{$key}=&escape(join(',',@merged));
+            } else {
+                $hashref->{$key}=$value;
+            }
+        } elsif ($action eq 'del') {
+            if (exists($hashref->{$key})) {
+                my %current;
+                map { $current{$_} = 1; } split(/,/,&unescape($hashref->{$key}));
+                map { delete($current{$_}); } split(/,/,&unescape($value));
+                if (keys(%current)) {
+                    $hashref->{$key}=&escape(join(',',sort(keys(%current))));
+                } else {
+                    delete($hashref->{$key});
+                }
+            }
+        }
+    }
+    if (&untie_user_hash($hashref)) {
+        &Reply( $client, "ok\n", $userinput);
+    } else {
+        &Failure($client, "error: ".($!+0)." untie(GDBM) failed ".
+                 "while attempting put\n",
+                 $userinput);
+    }
+    return 1;
+}
+&register_handler("updateclickers", \&update_clickers, 0, 1, 0);
+
+
+# Deletes one or more entries in a namespace db file at the domain level
+#
+# Parameters:
+#    $cmd      - The command that got us here.
+#    $tail     - Tail of the command (remaining parameters).
+#                In this case a colon separated list containing:
+#                (a) the domain for which we are deleting the entries,
+#                (b) &-separated list of keys to delete.  
+#    $client   - File descriptor connected to client.
+# Returns
+#     1        - Continue processing.
+#     0        - Requested to exit, caller should shut down.
+#  Side effects:
+#     reply is written to $client.
+#
+
+sub del_domain_handler {
+    my ($cmd,$tail,$client) = @_;
+
+    my $userinput = "$cmd:$tail";
+
+    my ($udom,$namespace,$what)=split(/:/,$tail,3);
+    chomp($what);
+    my $hashref = &tie_domain_hash($udom,$namespace,&GDBM_WRCREAT(),
+                                   "D", $what);
+    if ($hashref) {
+        my @keys=split(/\&/,$what);
+        foreach my $key (@keys) {
+            delete($hashref->{$key});
+        }
+        if (&untie_user_hash($hashref)) {
+            &Reply($client, "ok\n", $userinput);
+        } else {
+            &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ".
+                    "while attempting deldom\n", $userinput);
+        }
+    } else {
+        &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ".
+                 "while attempting deldom\n", $userinput);
+    }
+    return 1;
+}
+&register_handler("deldom", \&del_domain_handler, 0, 1, 0);
+
+
 # Unencrypted get from the namespace database file at the domain level.
 # This function retrieves a keyed item from a specific named database in the
 # domain directory.
 #
 # Parameters:
-#   $cmd             - Command request keyword (getdom).
+#   $cmd             - Command request keyword (get).
 #   $tail            - Tail of the command.  This is a colon separated list
 #                      consisting of the domain and the 'namespace' 
 #                      which selects the gdbm file to do the lookup in,
@@ -4679,20 +4863,80 @@ sub put_domain_handler {
 sub get_domain_handler {
     my ($cmd, $tail, $client) = @_;
 
+
     my $userinput = "$cmd:$tail";
 
     my ($udom,$namespace,$what)=split(/:/,$tail,3);
-    my $res = LONCAPA::Lond::get_dom($userinput);
-    if ($res =~ /^error:/) {
-        &Failure($client, \$res, $userinput);
+    chomp($what);
+    if ($namespace =~ /^enc/) {
+        &Failure( $client, "refused\n", $userinput);
     } else {
-        &Reply($client, \$res, $userinput);
+        my @queries=split(/\&/,$what);
+        my $qresult='';
+        my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_READER());
+        if ($hashref) {
+            for (my $i=0;$i<=$#queries;$i++) {
+                $qresult.="$hashref->{$queries[$i]}&";
+            }
+            if (&untie_domain_hash($hashref)) {
+                $qresult=~s/\&$//;
+                &Reply($client, \$qresult, $userinput);
+            } else {
+                &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
+                          "while attempting getdom\n",$userinput);
+            }
+        } else {
+            &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
+                     "while attempting getdom\n",$userinput);
+        }
     }
 
     return 1;
 }
 &register_handler("getdom", \&get_domain_handler, 0, 1, 0);
 
+sub encrypted_get_domain_handler {
+    my ($cmd, $tail, $client) = @_;
+
+    my $userinput = "$cmd:$tail";
+
+    my ($udom,$namespace,$what)=split(/:/,$tail,3);
+    chomp($what);
+    my @queries=split(/\&/,$what);
+    my $qresult='';
+    my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_READER());
+    if ($hashref) {
+        for (my $i=0;$i<=$#queries;$i++) {
+            $qresult.="$hashref->{$queries[$i]}&";
+        }
+        if (&untie_domain_hash($hashref)) {
+            $qresult=~s/\&$//;
+            if ($cipher) {
+                my $cmdlength=length($qresult);
+                $qresult.="         ";
+                my $encqresult='';
+                for (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
+                    $encqresult.= unpack("H16",
+                                         $cipher->encrypt(substr($qresult,
+                                                                 $encidx,
+                                                                 8)));
+                }
+                &Reply( $client, "enc:$cmdlength:$encqresult\n", $userinput);
+            } else {
+                &Failure( $client, "error:no_key\n", $userinput);
+            }
+        } else {
+            &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ".
+                      "while attempting egetdom\n",$userinput);
+        }
+    } else {
+        &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ".
+                 "while attempting egetdom\n",$userinput);
+    }
+    return 1;
+}
+&register_handler("egetdom", \&encrypted_get_domain_handler, 1, 1, 0);
+
 #
 #  Puts an id to a domains id database. 
 #
@@ -4802,7 +5046,7 @@ sub get_id_handler {
 # Returns:
 #     1   - Continue processing
 #     0   - Exit server.
-#
+#     
 #
 
 sub del_id_handler {
@@ -5209,116 +5453,6 @@ sub tmp_del_handler {
 &register_handler("tmpdel", \&tmp_del_handler, 0, 1, 0);
 
 #
-#  Process the updatebalcookie command.  This command updates a
-#  cookie in the lonBalancedir directory on a load balancer node.
-#
-# Parameters:
-#   $cmd      - Command that got us here.
-#   $tail     - Tail of the request (escaped cookie: escaped current entry)
-#
-#   $client   - socket open on the client process.
-#
-# Returns:
-#   1     - Indicating processing should continue.
-# Side Effects:
-#   A cookie file is updated from the lonBalancedir directory
-#   A reply is sent to the client.
-#
-sub update_balcookie_handler {
-    my ($cmd, $tail, $client) = @_;
-
-    my $userinput= "$cmd:$tail";
-    chomp($tail);
-    my ($cookie,$lastentry) = map { &unescape($_) } (split(/:/,$tail));
-
-    my $updatedone;
-    if ($cookie =~ /^$LONCAPA::match_domain\_$LONCAPA::match_username\_[a-f0-9]{32}$/) {
-        my $execdir=$perlvar{'lonBalanceDir'};
-        if (-e "$execdir/$cookie.id") {
-            my $doupdate;
-            if (open(my $fh,'<',"$execdir/$cookie.id")) {
-                while (my $line = <$fh>) {
-                    chomp($line);
-                    if ($line eq $lastentry) {
-                        $doupdate = 1;
-                        last;
-                    }
-                }
-                close($fh);
-            }
-            if ($doupdate) {
-                if (open(my $fh,'>',"$execdir/$cookie.id")) {
-                    print $fh $clientname;
-                    close($fh);
-                    $updatedone = 1;
-                }
-            }
-        }
-    }
-    if ($updatedone) {
-        &Reply($client, "ok\n", $userinput);
-    } else {
-        &Failure( $client, "error: ".($!+0)."file update failed ".
-                  "while attempting updatebalcookie\n", $userinput);
-    }
-    return 1;
-}
-&register_handler("updatebalcookie", \&update_balcookie_handler, 0, 1, 0);
-
-#
-#  Process the delbalcookie command. This command deletes a balancer
-#  cookie in the lonBalancedir directory on a load balancer node.
-#
-# Parameters:
-#   $cmd      - Command that got us here.
-#   $cookie   - Cookie to be deleted.
-#   $client   - socket open on the client process.
-#
-# Returns:
-#   1     - Indicating processing should continue.
-# Side Effects:
-#   A cookie file is deleted from the lonBalancedir directory
-#   A reply is sent to the client.
-sub del_balcookie_handler {
-    my ($cmd, $cookie, $client) = @_;
-
-    my $userinput= "$cmd:$cookie";
-
-    chomp($cookie);
-    $cookie = &unescape($cookie);
-    my $deleted = '';
-    if ($cookie =~ /^$LONCAPA::match_domain\_$LONCAPA::match_username\_[a-f0-9]{32}$/) {
-        my $execdir=$perlvar{'lonBalanceDir'};
-        if (-e "$execdir/$cookie.id") {
-            if (open(my $fh,'<',"$execdir/$cookie.id")) {
-                my $dodelete;
-                while (my $line = <$fh>) {
-                    chomp($line);
-                    if ($line eq $clientname) {
-                        $dodelete = 1;
-                        last;
-                    }
-                }
-                close($fh);
-                if ($dodelete) {
-                    if (unlink("$execdir/$cookie.id")) {
-                        $deleted = 1;
-                    }
-                }
-            }
-        }
-    }
-    if ($deleted) {
-        &Reply($client, "ok\n", $userinput);
-    } else {
-        &Failure( $client, "error: ".($!+0)."Unlinking cookie file Failed ".
-                  "while attempting delbalcookie\n", $userinput);
-    }
-    return 1;
-}
-&register_handler("delbalcookie", \&del_balcookie_handler, 0, 1, 0);
-
-#
 #   Processes the setannounce command.  This command
 #   creates a file named announce.txt in the top directory of
 #   the documentn root and sets its contents.  The announce.txt file is
@@ -5501,39 +5635,6 @@ sub validate_instcode_handler {
 }
 &register_handler("autovalidateinstcode", \&validate_instcode_handler, 0, 1, 0);
 
-#
-#  Validate co-owner for cross-listed institutional code and
-#  institutional course code itself used for a LON-CAPA course.
-#
-# Formal Parameters:
-#   $cmd          - The command request that got us dispatched.
-#   $tail         - The tail of the command.  In this case,
-#                   this is a colon separated string containing:
-#      $dom            - Course's LON-CAPA domain
-#      $instcode       - Institutional course code for the course
-#      $inst_xlist     - Institutional course Id for the crosslisting
-#      $coowner        - Username of co-owner
-#      (values for all but $dom have been escaped).
-#
-#   $client       - Socket open on the client.
-# Returns:
-#    1           - Indicating processing should continue.
-#
-sub validate_instcrosslist_handler  {
-    my ($cmd, $tail, $client) = @_;
-    my $userinput = "$cmd:$tail";
-    my ($dom,$instcode,$inst_xlist,$coowner) = split(/:/,$tail);
-    $instcode = &unescape($instcode);
-    $inst_xlist = &unescape($inst_xlist);
-    $coowner = &unescape($coowner);
-    my $outcome = &localenroll::validate_crosslist_access($dom,$instcode,
-                                                          $inst_xlist,$coowner);
-    &Reply($client, \$outcome, $userinput);
-
-    return 1;
-}
-&register_handler("autovalidateinstcrosslist", \&validate_instcrosslist_handler, 0, 1, 0);
-
 #   Get the official sections for which auto-enrollment is possible.
 #   Since the admin people won't know about 'unofficial sections' 
 #   we cannot auto-enroll on them.
@@ -5630,10 +5731,9 @@ sub validate_course_section_handler {
 # Formal Parameters:
 #    $cmd     - The command request that got us dispatched.
 #    $tail    - The tail of the command.   In this case this is a colon separated
-#               set of values that will be split into:
+#               set of words that will be split into:
 #               $inst_class  - Institutional code for the specific class section   
-#               $ownerlist   - An escaped comma-separated list of username:domain
-#                              of the course owner, and co-owner(s).
+#               $courseowner - The escaped username:domain of the course owner 
 #               $cdom        - The domain of the course from the institution's
 #                              point of view.
 #    $client  - The socket open on the client.
@@ -5658,112 +5758,6 @@ sub validate_class_access_handler {
 &register_handler("autovalidateclass_sec", \&validate_class_access_handler, 0, 1, 0);
 
 #
-#    Modify institutional sections (using customized &instsec_reformat()
-#    routine in localenroll.pm), to either clutter or declutter, for
-#    purposes of ensuring an institutional course section (string) can
-#    be unambiguously separated into institutional course and section.
-#
-# Formal Parameters:
-#    $cmd     - The command request that got us dispatched.
-#    $tail    - The tail of the command.   In this case this is a colon separated
-#               set of values that will be split into:
-#               $cdom        - The LON-CAPA domain of the course.
-#               $action      - Either: clutter or declutter
-#                              clutter adds character(s) to eliminate ambiguity
-#                              declutter removes the added characters (e.g., for
-#                              display of the institutional course section string.
-#               $info        - A frozen hash in which keys are:
-#                              LON-CAPA course number:Institutional course code
-#                              and values are a reference to an array of the
-#                              items to modify -- either institutional sections,
-#                              or institutional course sections (for crosslistings).
-#    $client  - The socket open on the client.
-# Returns:
-#    1 - continue processing.
-#
-
-sub instsec_reformat_handler {
-    my ($cmd, $tail, $client) = @_;
-    my $userinput = "$cmd:$tail";
-    my ($cdom,$action,$info) = split(/:/,$tail);
-    my $instsecref = &Apache::lonnet::thaw_unescape($info);
-    my ($outcome,$result);
-    eval {
-        local($SIG{__DIE__})='DEFAULT';
-        $outcome=&localenroll::instsec_reformat($cdom,$action,$instsecref);
-        if ($outcome eq 'ok') {
-            if (ref($instsecref) eq 'HASH') {
-                foreach my $key (keys(%{$instsecref})) {
-                    $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($instsecref->{$key}).'&';
-                }
-                $result =~ s/\&$//;
-            }
-        }
-    };
-    if (!$@) {
-        if ($outcome eq 'ok') {
-            &Reply( $client, \$result, $userinput);
-        } else {
-            &Reply($client,\$outcome, $userinput);
-        }
-    } else {
-        &Failure($client,"unknown_cmd\n",$userinput);
-    }
-    return 1;
-}
-&register_handler("autoinstsecreformat",\&instsec_reformat_handler, 0, 1, 0);
-
-#
-#   Validate course owner or co-owners(s) access to enrollment data for all sections
-#   and crosslistings for a particular course.
-#
-#
-# Formal Parameters:
-#    $cmd     - The command request that got us dispatched.
-#    $tail    - The tail of the command.   In this case this is a colon separated
-#               set of values that will be split into:
-#               $ownerlist   - An escaped comma-separated list of username:domain
-#                              of the course owner, and co-owner(s).
-#               $cdom        - The domain of the course from the institution's
-#                              point of view.
-#               $classes     - Frozen hash of institutional course sections and
-#                              crosslistings.
-#    $client  - The socket open on the client.
-# Returns:
-#    1 - continue processing.
-#
-
-sub validate_classes_handler {
-    my ($cmd, $tail, $client) = @_;
-    my $userinput = "$cmd:$tail";
-    my ($ownerlist,$cdom,$classes) = split(/:/, $tail);
-    my $classesref = &Apache::lonnet::thaw_unescape($classes);
-    my $owners = &unescape($ownerlist);
-    my $result;
-    eval {
-        local($SIG{__DIE__})='DEFAULT';
-        my %validations;
-        my $response = &localenroll::check_instclasses($owners,$cdom,$classesref,
-                                                       \%validations);
-        if ($response eq 'ok') {
-            foreach my $key (keys(%validations)) {
-                $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($validations{$key}).'&';
-            }
-            $result =~ s/\&$//;
-        } else {
-            $result = 'error';
-        }
-    };
-    if (!$@) {
-        &Reply($client, \$result, $userinput);
-    } else {
-        &Failure($client,"unknown_cmd\n",$userinput);
-    }
-    return 1;
-}
-&register_handler("autovalidateinstclasses", \&validate_classes_handler, 0, 1, 0);
-
-#
 #   Create a password for a new LON-CAPA user added by auto-enrollment.
 #   Only used for case where authentication method for new user is localauth
 #
@@ -5843,7 +5837,6 @@ sub auto_export_grades_handler {
 &register_handler("autoexportgrades", \&auto_export_grades_handler,
                   1, 1, 0);
 
-
 #   Retrieve and remove temporary files created by/during autoenrollment.
 #
 # Formal Parameters:
@@ -5864,6 +5857,7 @@ sub retrieve_auto_file_handler {
     my ($filename)   = split(/:/, $tail);
 
     my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
+
     if ($filename =~m{/\.\./}) {
         &Failure($client, "refused\n", $userinput);
     } elsif ($filename !~ /^$LONCAPA::match_domain\_$LONCAPA::match_courseid\_.+_classlist\.xml$/) {
@@ -5900,7 +5894,7 @@ sub crsreq_checks_handler {
     my $userinput = "$cmd:$tail";
     my $dom = $tail;
     my $result;
-    my @reqtypes = ('official','unofficial','community','textbook');
+    my @reqtypes = ('official','unofficial','community','textbook','placement');
     eval {
         local($SIG{__DIE__})='DEFAULT';
         my %validations;
@@ -6505,12 +6499,13 @@ sub get_request {
 #
 # Parameters:
 #    user_input   - The request received from the client (lonc).
+#
 # Returns:
 #    true to keep processing, false if caller should exit.
 #
 sub process_request {
-    my ($userinput) = @_;      # Easier for now to break style than to
-                                # fix all the userinput -> user_input.
+    my ($userinput) = @_; # Easier for now to break style than to
+                          # fix all the userinput -> user_input.
     my $wasenc    = 0;		# True if request was encrypted.
 # ------------------------------------------------------------ See if encrypted
     # for command
@@ -6590,6 +6585,62 @@ sub process_request {
 	    Debug("Client not privileged to do this operation");
 	    $ok = 0;
 	}
+        if ($ok) {
+            my $realcommand = $command;
+            if ($command eq 'querysend') {
+                my ($query,$rest)=split(/\:/,$tail,2);
+                $query=~s/\n*$//g;
+                my @possqueries = 
+                    qw(userlog courselog fetchenrollment institutionalphotos usersearch instdirsearch getinstuser getmultinstusers);
+                if (grep(/^\Q$query\E$/,@possqueries)) {
+                    $command .= '_'.$query;
+                } elsif ($query eq 'prepare activity log') {
+                    $command .= '_activitylog';
+                }
+            }
+            if (ref($trust{$command}) eq 'HASH') {
+                my $donechecks;
+                if ($trust{$command}{'anywhere'}) {
+                   $donechecks = 1;
+                } elsif ($trust{$command}{'manageronly'}) {
+                    unless (&isManager()) {
+                        $ok = 0;
+                    }
+                    $donechecks = 1;
+                } elsif ($trust{$command}{'institutiononly'}) {
+                    unless ($clientsameinst) {
+                        $ok = 0;
+                    }
+                    $donechecks = 1;
+                } elsif ($clientsameinst) {
+                    $donechecks = 1;
+                }
+                unless ($donechecks) {
+                    foreach my $rule (keys(%{$trust{$command}})) {
+                        next if ($rule eq 'remote');
+                        if ($trust{$command}{$rule}) {
+                            if ($clientprohibited{$rule}) {
+                                $ok = 0;
+                            } else {
+                                $ok = 1;
+                                $donechecks = 1;
+                                last;
+                            }
+                        }
+                    }
+                }
+                unless ($donechecks) {
+                    if ($trust{$command}{'remote'}) {
+                        if ($clientremoteok) {
+                            $ok = 1;
+                        } else {
+                            $ok = 0;
+                        } 
+                    }
+                }
+            }
+            $command = $realcommand;
+        }
 
 	if($ok) {
 	    Debug("Dispatching to handler $command $tail");
@@ -6600,8 +6651,7 @@ sub process_request {
 	    Failure($client, "refused\n", $userinput);
 	    return 1;
 	}
-
-    }    
+    }
 
     print $client "unknown_cmd\n";
 # -------------------------------------------------------------------- complete
@@ -6741,8 +6791,8 @@ my $wwwid=getpwnam('www');
 if ($wwwid!=$<) {
    my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
    my $subj="LON: $currenthostid User ID mismatch";
-   system("echo 'User ID mismatch.  lond must be run as user www.' |".
-          " mail -s '$subj' $emailto > /dev/null");
+   system("echo 'User ID mismatch.  lond must be run as user www.' |\
+ mailto $emailto -s '$subj' > /dev/null");
    exit 1;
 }
 
@@ -6858,6 +6908,7 @@ sub UpdateHosts {
     #  will take care of new and changed hosts as connections come into being.
 
     &Apache::lonnet::reset_hosts_info();
+    my %active;
 
     foreach my $child (keys(%children)) {
 	my $childip = $children{$child};
@@ -6867,15 +6918,62 @@ sub UpdateHosts {
 		    ." $child for ip $childip </font>");
 	    kill('INT', $child);
 	} else {
+            $active{$child} = $childip;
 	    logthis('<font color="green"> keeping child for ip '
 		    ." $childip (pid=$child) </font>");
 	}
     }
+
+    my %oldconf = %secureconf;
+    my %connchange;
+    if (lonssl::Read_Connect_Config(\%secureconf,\%perlvar) eq 'ok') {
+        logthis('<font color="blue"> Reloaded SSL connection rules </font>');
+    } else {
+        logthis('<font color="yellow"> Failed to reload SSL connection rules </font>');
+    }
+    if ((ref($oldconf{'connfrom'}) eq 'HASH') && (ref($secureconf{'connfrom'}) eq 'HASH')) {
+        foreach my $type ('dom','intdom','other') {
+            if ((($oldconf{'connfrom'}{$type} eq 'no') && ($secureconf{'connfrom'}{$type} eq 'req')) ||
+                (($oldconf{'connfrom'}{$type} eq 'req') && ($secureconf{'connfrom'}{$type} eq 'no'))) {
+                $connchange{$type} = 1;
+            }
+        }
+    }
+    if (keys(%connchange)) {
+        foreach my $child (keys(%active)) {
+            my $childip = $active{$child};
+            if ($childip ne '127.0.0.1') {
+                my $childhostname  = gethostbyaddr(Socket::inet_aton($childip),AF_INET);
+                if ($childhostname ne '') {
+                    my $childlonhost = &Apache::lonnet::get_server_homeID($childhostname);
+                    my ($samedom,$sameinst) = &set_client_info($childlonhost);
+                    if ($samedom) {
+                        if ($connchange{'dom'}) {
+                            logthis('<font color="blue"> UpdateHosts killing child '
+                                   ." $child for ip $childip </font>");
+                            kill('INT', $child);
+                        }
+                    } elsif ($sameinst) {
+                        if ($connchange{'intdom'}) {
+                            logthis('<font color="blue"> UpdateHosts killing child '
+                                   ." $child for ip $childip </font>");
+                           kill('INT', $child);
+                        }
+                    } else {
+                        if ($connchange{'other'}) {
+                            logthis('<font color="blue"> UpdateHosts killing child '
+                                   ." $child for ip $childip </font>");
+                            kill('INT', $child);
+                        }
+                    }
+                }
+            }
+        }
+    }
     ReloadApache;
     &status("Finished reloading hosts.tab");
 }
 
-
 sub checkchildren {
     &status("Checking on the children (sending signals)");
     &initnewstatus();
@@ -6945,6 +7043,9 @@ sub Debug {
 #     reply   - Text to send to client.
 #     request - Original request from client.
 #
+#NOTE $reply must be terminated by exactly *one* \n. If $reply is a reference
+#this is done automatically ($$reply must not contain any \n in this case). 
+#If $reply is a string the caller has to ensure this.
 sub Reply {
     my ($fd, $reply, $request) = @_;
     if (ref($reply)) {
@@ -7107,6 +7208,10 @@ if ($arch eq 'unknown') {
     chomp($arch);
 }
 
+unless (lonssl::Read_Connect_Config(\%secureconf,\%perlvar) eq 'ok') {
+    &logthis('<font color="blue">No connectionrules table. Will fallback to loncapa.conf</font>');
+}
+
 # --------------------------------------------------------------
 #   Accept connections.  When a connection comes in, it is validated
 #   and if good, a child process is created to process transactions
@@ -7192,13 +7297,13 @@ sub make_new_child {
         &Authen::Krb5::init_context();
 
         my $no_ets;
-        if ($dist =~ /^(?:centos|rhes|scientific|oracle)(\d+)$/) {
+        if ($dist =~ /^(?:centos|rhes|scientific)(\d+)$/) {
             if ($1 >= 7) {
                 $no_ets = 1;
             }
         } elsif ($dist =~ /^suse(\d+\.\d+)$/) {
             if (($1 eq '9.3') || ($1 >= 12.2)) {
-                $no_ets = 1;
+                $no_ets = 1; 
             }
         } elsif ($dist =~ /^sles(\d+)$/) {
             if ($1 > 11) {
@@ -7210,8 +7315,8 @@ sub make_new_child {
             }
         }
         unless ($no_ets) {
-            &Authen::Krb5::init_ets();
-        }
+	    &Authen::Krb5::init_ets();
+	}
 
 	&status('Accepted connection');
 # =============================================================================
@@ -7237,7 +7342,7 @@ sub make_new_child {
 	    $ConnectionType = "manager";
 	    $clientname = $managers{$outsideip};
 	}
-	my $clientok;
+	my ($clientok,$clientinfoset);
 
 	if ($clientrec || $ismanager) {
 	    &status("Waiting for init from $clientip $clientname");
@@ -7255,17 +7360,42 @@ sub make_new_child {
 		#  If the remote is attempting a local init... give that a try:
 		#
 		(my $i, my $inittype, $clientversion) = split(/:/, $remotereq);
-                # For LON-CAPA 2.9, the  client session will have sent its LON-CAPA
-                # version when initiating the connection. For LON-CAPA 2.8 and older,
-                # the version is retrieved from the global %loncaparevs in lonnet.pm.
-                # $clientversion contains path to keyfile if $inittype eq 'local'
-                # it's overridden below in this case
-                $clientversion ||= $Apache::lonnet::loncaparevs{$clientname};
+        # For LON-CAPA 2.9, the  client session will have sent its LON-CAPA
+        # version when initiating the connection. For LON-CAPA 2.8 and older,
+        # the version is retrieved from the global %loncaparevs in lonnet.pm.            
+        # $clientversion contains path to keyfile if $inittype eq 'local'
+        # it's overridden below in this case
+        $clientversion ||= $Apache::lonnet::loncaparevs{$clientname};
 
 		# If the connection type is ssl, but I didn't get my
 		# certificate files yet, then I'll drop  back to 
 		# insecure (if allowed).
-		
+
+                if ($inittype eq "ssl") {
+                    my $context;
+                    if ($clientsamedom) {
+                        $context = 'dom';
+                        if ($secureconf{'connfrom'}{'dom'} eq 'no') {
+                            $inittype = "";
+                        }
+                    } elsif ($clientsameinst) {
+                        $context = 'intdom';
+                        if ($secureconf{'connfrom'}{'intdom'} eq 'no') {
+                            $inittype = "";
+                        }
+                    } else {
+                        $context = 'other';
+                        if ($secureconf{'connfrom'}{'other'} eq 'no') {
+                            $inittype = "";
+                        }
+                    }
+                    if ($inittype eq '') {
+                        &logthis("<font color=\"blue\"> Domain config set "
+                                ."to no ssl for $clientname (context: $context)"
+                                ." -- trying insecure auth</font>");
+                    }
+                }
+
 		if($inittype eq "ssl") {
 		    my ($ca, $cert) = lonssl::CertificateFile;
 		    my $kfile       = lonssl::KeyFile;
@@ -7298,7 +7428,7 @@ sub make_new_child {
 			close $client;
 		    }
 		} elsif ($inittype eq "ssl") {
-		    my $key = SSLConnection($client);
+		    my $key = SSLConnection($client,$clientname);
 		    if ($key) {
 			$clientok = 1;
 			my $cipherkey = pack("H32", $key);
@@ -7313,6 +7443,7 @@ sub make_new_child {
 		    }
 	   
 		} else {
+                    $clientinfoset = &set_client_info();
 		    my $ok = InsecureConnection($client);
 		    if($ok) {
 			$clientok = 1;
@@ -7350,9 +7481,34 @@ sub make_new_child {
 # ------------------------------------------------------------ Process requests
 	    my $keep_going = 1;
 	    my $user_input;
-            my $clienthost = &Apache::lonnet::hostname($clientname);
-            my $clientserverhomeID = &Apache::lonnet::get_server_homeID($clienthost);
-            $clienthomedom = &Apache::lonnet::host_domain($clientserverhomeID);
+            unless ($clientinfoset) {
+                $clientinfoset = &set_client_info();
+            }
+            $clientremoteok = 0;
+            unless ($clientsameinst) {
+                $clientremoteok = 1;
+                my $defdom = &Apache::lonnet::host_domain($perlvar{'lonHostID'});
+                %clientprohibited = &get_prohibited($defdom);
+                if ($clientintdom) {
+                    my $remsessconf = &get_usersession_config($defdom,'remotesession');
+                    if (ref($remsessconf) eq 'HASH') {
+                        if (ref($remsessconf->{'remote'}) eq 'HASH') {
+                            if (ref($remsessconf->{'remote'}->{'excludedomain'}) eq 'ARRAY') {
+                                if (grep(/^\Q$clientintdom\E$/,@{$remsessconf->{'remote'}->{'excludedomain'}})) {
+                                    $clientremoteok = 0;
+                                }
+                            }
+                            if (ref($remsessconf->{'remote'}->{'includedomain'}) eq 'ARRAY') {
+                                if (grep(/^\Q$clientintdom\E$/,@{$remsessconf->{'remote'}->{'includedomain'}})) {
+                                    $clientremoteok = 1;
+                                } else {
+                                    $clientremoteok = 0;
+                                }
+                            }
+                        }
+                    }
+                }
+            }
 	    while(($user_input = get_request) && $keep_going) {
 		alarm(120);
 		Debug("Main: Got $user_input\n");
@@ -7368,7 +7524,7 @@ sub make_new_child {
 	    &logthis("<font color='blue'>WARNING: "
 		     ."Rejected client $clientip, closing connection</font>");
 	}
-    }            
+    }
     
 # =============================================================================
     
@@ -7382,6 +7538,60 @@ sub make_new_child {
     exit;
     
 }
+
+#
+#  Used to determine if a particular client is from the same domain
+#  as the current server, or from the same internet domain.
+#
+#  Optional input -- the client to check for domain and internet domain.
+#  If not specified, defaults to the package variable: $clientname
+#
+#  If called in array context will not set package variables, but will
+#  instead return an array of two values - (a) true if client is in the
+#  same domain as the server, and (b) true if client is in the same internet
+#  domain.
+#
+#  If called in scalar context, sets package variables for current client:
+#
+#  $clienthomedom  - LonCAPA domain of homeID for client.
+#  $clientsamedom  - LonCAPA domain same for this host and client.
+#  $clientintdom   - LonCAPA "internet domain" for client.
+#  $clientsameinst - LonCAPA "internet domain" same for this host & client.
+#
+#  returns 1 to indicate package variables have been set for current client.
+#
+
+sub set_client_info {
+    my ($lonhost) = @_;
+    $lonhost ||= $clientname;
+    my $clienthost = &Apache::lonnet::hostname($lonhost);
+    my $clientserverhomeID = &Apache::lonnet::get_server_homeID($clienthost);
+    my $homedom = &Apache::lonnet::host_domain($clientserverhomeID);
+    my $samedom = 0;
+    if ($perlvar{'lonDefDom'} eq $homedom) {
+        $samedom = 1;
+    }
+    my $intdom = &Apache::lonnet::internet_dom($clientserverhomeID);
+    my $sameinst = 0;
+    if ($intdom ne '') {
+        my $internet_names = &Apache::lonnet::get_internet_names($currenthostid);
+        if (ref($internet_names) eq 'ARRAY') {
+            if (grep(/^\Q$intdom\E$/,@{$internet_names})) {
+                $sameinst = 1;
+            }
+        }
+    }
+    if (wantarray) {
+        return ($samedom,$sameinst);
+    } else {
+        $clienthomedom = $homedom;
+        $clientsamedom = $samedom;
+        $clientintdom = $intdom;
+        $clientsameinst = $sameinst;
+        return 1;
+    }
+}
+
 #
 #   Determine if a user is an author for the indicated domain.
 #
@@ -7704,7 +7914,7 @@ sub check_internal_passwd {
                 $defaultcost = 10;
             }
             if (int($rest[0])<int($defaultcost)) {
-                if ($domdefaults{'intauth_check'} == 1) {
+                if ($domdefaults{'intauth_check'} == 1) { 
                     my $ncpass = &hash_passwd($domain,$plainpass);
                     if (&rewrite_password_file($domain,$user,"internal:$ncpass")) {
                         &update_passwd_history($user,$domain,'internal','update cost');
@@ -8065,8 +8275,8 @@ sub make_passwd_file {
 	    &Debug("Creating internal auth");
 	    my $pf = IO::File->new(">$passfilename");
 	    if($pf) {
-		print $pf "internal:$ncpass\n"; 
-                &update_passwd_history($uname,$udom,$umode,$action);
+		print $pf "internal:$ncpass\n";
+                &update_passwd_history($uname,$udom,$umode,$action); 
 	    } else {
 		$result = "pass_file_failed_error";
 	    }
@@ -8139,10 +8349,8 @@ sub get_usersession_config {
         return $usersessionconf;
     } else {
         my %domconfig = &Apache::lonnet::get_dom('configuration',['usersessions'],$dom);
-        if (ref($domconfig{'usersessions'}) eq 'HASH') {
-            &Apache::lonnet::do_cache_new($name,$dom,$domconfig{'usersessions'},3600);
-            return $domconfig{'usersessions'};
-        }
+        &Apache::lonnet::do_cache_new($name,$dom,$domconfig{'usersessions'},3600);
+        return $domconfig{'usersessions'};
     }
     return;
 }
@@ -8154,12 +8362,47 @@ sub get_usersearch_config {
         return $usersearchconf;
     } else {
         my %domconfig = &Apache::lonnet::get_dom('configuration',['directorysrch'],$dom);
-        &Apache::lonnet::do_cache_new($name,$dom,$domconfig{'directorysrch'},3600);
+        &Apache::lonnet::do_cache_new($name,$dom,$domconfig{'directorysrch'},600);
         return $domconfig{'directorysrch'};
     }
     return;
 }
 
+sub get_prohibited {
+    my ($dom) = @_;
+    my $name = 'trust';
+    my ($trustconfig,$cached)=&Apache::lonnet::is_cached_new($name,$dom);
+    unless (defined($cached)) {
+        my %domconfig = &Apache::lonnet::get_dom('configuration',['trust'],$dom);
+        &Apache::lonnet::do_cache_new($name,$dom,$domconfig{'trust'},3600);
+        $trustconfig = $domconfig{'trust'};
+    }
+    my %prohibited;
+    if (ref($trustconfig)) {
+        foreach my $prefix (keys(%{$trustconfig})) {
+            if (ref($trustconfig->{$prefix}) eq 'HASH') {
+                my $reject;
+                if (ref($trustconfig->{$prefix}->{'exc'}) eq 'ARRAY') {
+                    if (grep(/^\Q$clientintdom\E$/,@{$trustconfig->{$prefix}->{'exc'}})) {
+                        $reject = 1;
+                    }
+                }
+                if (ref($trustconfig->{$prefix}->{'inc'}) eq 'ARRAY') {
+                    if (grep(/^\Q$clientintdom\E$/,@{$trustconfig->{$prefix}->{'inc'}})) {
+                        $reject = 0;
+                    } else {
+                        $reject = 1;
+                    }
+                }
+                if ($reject) {
+                    $prohibited{$prefix} = 1;
+                }
+            }
+        }
+    }
+    return %prohibited;
+}
+
 sub distro_and_arch {
     return $dist.':'.$arch;
 }
@@ -8343,7 +8586,7 @@ Allow for a password to be set.
 
 Make a user.
 
-=item passwd
+=item changeuserauth
 
 Allow for authentication mechanism and password to be changed.
 
@@ -8432,6 +8675,10 @@ for each student, defined perhaps by the
 Returns usernames corresponding to IDs.  (These "IDs" are unique identifiers
 for each student, defined perhaps by the institutional Registrar.)
 
+=item iddel
+
+Deletes one or more ids in a domain's id database.
+
 =item tmpput
 
 Accept and store information in temporary space.
@@ -8481,13 +8728,14 @@ IO::File
 Apache::File
 POSIX
 Crypt::IDEA
-LWP::UserAgent()
 GDBM_File
 Authen::Krb4
 Authen::Krb5
 
 =head1 COREQUISITES
 
+none
+
 =head1 OSNAMES
 
 linux
@@ -8575,9 +8823,9 @@ or the CA's certificate in the call to l
 <error> is the textual reason this failed.  Usual reasons:
 
 =over 2
-       
+
 =item Apache config file for loncapa  incorrect:
- 
+
 one of the variables 
 lonCertificateDirectory, lonnetCertificateAuthority, or lonnetCertificate
 undefined or incorrect
@@ -8696,7 +8944,7 @@ Could not rewrite the
 internal password file for a user
 
 =item Result of password change for <user> : <result>
-                                                                     
+
 A unix password change for <user> was attempted 
 and the pipe returned <result>  
 
@@ -8725,7 +8973,7 @@ lond has been asked to exit by its clien
 client systemand <input> is the full exit command sent to the server.
 
 =item Red CRITICAL: ABNORMAL EXIT. child <pid> for server <hostname> died through a crass with this error->[<message>].
-                                                 
+
 A lond child terminated.  NOte that this termination can also occur when the
 child receives the QUIT or DIE signals.  <pid> is the process id of the child,
 <hostname> the host lond is working for, and <message> the reason the child died
@@ -8809,7 +9057,7 @@ file when sent it's USR1 signal.  That p
 assumed to be hung in some un-fixable way.
 
 =item Finished checking children                   
- 
+
 Master processs's USR1 processing is cojmplete.
 
 =item (Red) CRITICAL: ------- Starting ------            
@@ -8823,7 +9071,7 @@ Started a new child process for <client>
 connected to the child.  This was as a result of a TCP/IP connection from a client.
 
 =item Unable to determine who caller was, getpeername returned nothing
-                                                  
+
 In child process initialization.  either getpeername returned undef or
 a zero sized object was returned.  Processing continues, but in my opinion,
 this should be cause for the child to exit.
@@ -8834,7 +9082,7 @@ In child process initialization.  The pe
 The client address is stored as "Unavailable" and processing continues.
 
 =item (Yellow) INFO: Connection <ip> <name> connection type = <type>
-                                                  
+
 In child initialization.  A good connectionw as received from <ip>.
 
 =over 2
@@ -8884,7 +9132,7 @@ The client (<client> is the peer's name
 negotiated an SSL connection with this child process.
 
 =item (Green) Successful insecure authentication with <client>
-                                                   
+
 
 The client has successfully negotiated an  insecure connection withthe child process.