Annotation of loncom/lond, revision 1.165.2.2

1.1       albertel    1: #!/usr/bin/perl
                      2: # The LearningOnline Network
                      3: # lond "LON Daemon" Server (port "LOND" 5663)
1.60      www         4: #
1.165.2.2! albertel    5: # $Id: lond,v 1.165.2.1 2004/01/14 01:20:40 albertel Exp $
1.60      www         6: #
                      7: # Copyright Michigan State University Board of Trustees
                      8: #
                      9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
                     10: #
                     11: # LON-CAPA is free software; you can redistribute it and/or modify
                     12: # it under the terms of the GNU General Public License as published by
                     13: # the Free Software Foundation; either version 2 of the License, or
                     14: # (at your option) any later version.
                     15: #
                     16: # LON-CAPA is distributed in the hope that it will be useful,
                     17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
                     18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     19: # GNU General Public License for more details.
                     20: #
                     21: # You should have received a copy of the GNU General Public License
                     22: # along with LON-CAPA; if not, write to the Free Software
                     23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
                     24: #
                     25: # /home/httpd/html/adm/gpl.txt
                     26: #
1.161     foxr       27: 
                     28: 
1.60      www        29: # http://www.lon-capa.org/
                     30: #
1.54      harris41   31: 
1.134     albertel   32: use strict;
1.80      harris41   33: use lib '/home/httpd/lib/perl/';
                     34: use LONCAPA::Configuration;
                     35: 
1.1       albertel   36: use IO::Socket;
                     37: use IO::File;
1.126     albertel   38: #use Apache::File;
1.1       albertel   39: use Symbol;
                     40: use POSIX;
                     41: use Crypt::IDEA;
                     42: use LWP::UserAgent();
1.3       www        43: use GDBM_File;
                     44: use Authen::Krb4;
1.91      albertel   45: use Authen::Krb5;
1.49      albertel   46: use lib '/home/httpd/lib/perl/';
                     47: use localauth;
1.143     foxr       48: use File::Copy;
1.1       albertel   49: 
1.77      foxr       50: my $DEBUG = 0;		       # Non zero to enable debug log entries.
                     51: 
1.57      www        52: my $status='';
                     53: my $lastlog='';
                     54: 
1.165.2.2! albertel   55: my $VERSION='$Revision: 1.165.2.1 $'; #' stupid emacs
1.121     albertel   56: my $remoteVERSION;
1.115     albertel   57: my $currenthostid;
                     58: my $currentdomainid;
1.134     albertel   59: 
                     60: my $client;
1.140     foxr       61: my $clientip;
1.161     foxr       62: my $clientname;
1.140     foxr       63: 
1.134     albertel   64: my $server;
                     65: my $thisserver;
                     66: 
1.161     foxr       67: # 
                     68: #   Connection type is:
                     69: #      client                   - All client actions are allowed
                     70: #      manager                  - only management functions allowed.
                     71: #      both                     - Both management and client actions are allowed
                     72: #
                     73: 
                     74: my $ConnectionType;
                     75: 
1.134     albertel   76: my %hostid;
                     77: my %hostdom;
                     78: my %hostip;
1.161     foxr       79: 
                     80: my %managers;			# Ip -> manager names
                     81: 
1.141     foxr       82: my %perlvar;			# Will have the apache conf defined perl vars.
1.134     albertel   83: 
1.96      foxr       84: #
                     85: #  The array below are password error strings."
                     86: #
1.97      foxr       87: my $lastpwderror    = 13;		# Largest error number from lcpasswd.
1.96      foxr       88: my @passwderrors = ("ok",
                     89: 		   "lcpasswd must be run as user 'www'",
                     90: 		   "lcpasswd got incorrect number of arguments",
                     91: 		   "lcpasswd did not get the right nubmer of input text lines",
                     92: 		   "lcpasswd too many simultaneous pwd changes in progress",
                     93: 		   "lcpasswd User does not exist.",
                     94: 		   "lcpasswd Incorrect current passwd",
                     95: 		   "lcpasswd Unable to su to root.",
                     96: 		   "lcpasswd Cannot set new passwd.",
                     97: 		   "lcpasswd Username has invalid characters",
1.97      foxr       98: 		   "lcpasswd Invalid characters in password",
                     99: 		    "11", "12",
                    100: 		    "lcpasswd Password mismatch");
                    101: 
                    102: 
                    103: #  The array below are lcuseradd error strings.:
                    104: 
                    105: my $lastadderror = 13;
                    106: my @adderrors    = ("ok",
                    107: 		    "User ID mismatch, lcuseradd must run as user www",
                    108: 		    "lcuseradd Incorrect number of command line parameters must be 3",
                    109: 		    "lcuseradd Incorrect number of stdinput lines, must be 3",
                    110: 		    "lcuseradd Too many other simultaneous pwd changes in progress",
                    111: 		    "lcuseradd User does not exist",
1.153     www       112: 		    "lcuseradd Unable to make www member of users's group",
1.97      foxr      113: 		    "lcuseradd Unable to su to root",
                    114: 		    "lcuseradd Unable to set password",
1.153     www       115: 		    "lcuseradd Usrname has invalid characters",
1.97      foxr      116: 		    "lcuseradd Password has an invalid character",
                    117: 		    "lcuseradd User already exists",
                    118: 		    "lcuseradd Could not add user.",
                    119: 		    "lcuseradd Password mismatch");
                    120: 
1.96      foxr      121: 
                    122: #
1.140     foxr      123: #   GetCertificate: Given a transaction that requires a certificate,
                    124: #   this function will extract the certificate from the transaction
                    125: #   request.  Note that at this point, the only concept of a certificate
                    126: #   is the hostname to which we are connected.
                    127: #
                    128: #   Parameter:
                    129: #      request   - The request sent by our client (this parameterization may
                    130: #                  need to change when we really use a certificate granting
                    131: #                  authority.
                    132: #
                    133: sub GetCertificate {
                    134:     my $request = shift;
                    135: 
                    136:     return $clientip;
                    137: }
1.161     foxr      138: 
                    139: #
                    140: #   Return true if client is a manager.
                    141: #
                    142: sub isManager {
                    143:     return (($ConnectionType eq "manager") || ($ConnectionType eq "both"));
                    144: }
                    145: #
                    146: #   Return tru if client can do client functions
                    147: #
                    148: sub isClient {
                    149:     return (($ConnectionType eq "client") || ($ConnectionType eq "both"));
                    150: }
                    151: 
                    152: 
1.156     foxr      153: #
                    154: #   ReadManagerTable: Reads in the current manager table. For now this is
                    155: #                     done on each manager authentication because:
                    156: #                     - These authentications are not frequent
                    157: #                     - This allows dynamic changes to the manager table
                    158: #                       without the need to signal to the lond.
                    159: #
                    160: 
                    161: sub ReadManagerTable {
                    162: 
                    163:     #   Clean out the old table first..
                    164: 
                    165:     foreach my $key (keys %managers) {
                    166: 	delete $managers{$key};
                    167:     }
                    168: 
                    169:     my $tablename = $perlvar{'lonTabDir'}."/managers.tab";
                    170:     if (!open (MANAGERS, $tablename)) {
                    171: 	logthis('<font color="red">No manager table.  Nobody can manage!!</font>');
                    172: 	return;
                    173:     }
                    174:     while(my $host = <MANAGERS>) {
                    175: 	chomp($host);
1.161     foxr      176: 	if (!defined $hostip{$host}) { # This is a non cluster member
                    177: 
                    178: 	    #  The entry is of the form:
                    179: 	    #    cluname:hostname
                    180: 	    #  cluname - A 'cluster hostname' is needed in order to negotiate
                    181: 	    #            the host key.
                    182: 	    #  hostname- The dns name of the host.
                    183: 	    #
                    184: 	    
                    185: 	    my($cluname, $dnsname) = split(/:/, $host);
                    186: 	    open(MGRPIPE, "/usr/bin/host $dnsname |") || die "Can't make host pipeline";
                    187: 	    my $dnsinfo = <MGRPIPE>;
                    188: 	    chomp $dnsinfo;
                    189: 	    close MGRPIPE;
                    190: 	    my($jname, $jhas, $jaddress, $hostip) = split(/ /, $dnsinfo);
                    191: 	    $managers{$hostip} = $cluname;
1.156     foxr      192: 	} else {
1.161     foxr      193: 	    $managers{$hostip{$host}} = $host;  # Use info from cluster tab if clumemeber
1.156     foxr      194: 	}
                    195:     }
                    196: }
1.140     foxr      197: 
                    198: #
                    199: #  ValidManager: Determines if a given certificate represents a valid manager.
                    200: #                in this primitive implementation, the 'certificate' is
                    201: #                just the connecting loncapa client name.  This is checked
                    202: #                against a valid client list in the configuration.
                    203: #
                    204: #                  
                    205: sub ValidManager {
                    206:     my $certificate = shift; 
                    207: 
1.163     foxr      208:     return isManager;
1.140     foxr      209: }
                    210: #
1.143     foxr      211: #  CopyFile:  Called as part of the process of installing a 
                    212: #             new configuration file.  This function copies an existing
                    213: #             file to a backup file.
                    214: # Parameters:
                    215: #     oldfile  - Name of the file to backup.
                    216: #     newfile  - Name of the backup file.
                    217: # Return:
                    218: #     0   - Failure (errno has failure reason).
                    219: #     1   - Success.
                    220: #
                    221: sub CopyFile {
                    222:     my $oldfile = shift;
                    223:     my $newfile = shift;
                    224: 
                    225:     #  The file must exist:
                    226: 
                    227:     if(-e $oldfile) {
                    228: 
                    229: 	 # Read the old file.
                    230: 
                    231: 	my $oldfh = IO::File->new("< $oldfile");
                    232: 	if(!$oldfh) {
                    233: 	    return 0;
                    234: 	}
                    235: 	my @contents = <$oldfh>;  # Suck in the entire file.
                    236: 
                    237: 	# write the backup file:
                    238: 
                    239: 	my $newfh = IO::File->new("> $newfile");
                    240: 	if(!(defined $newfh)){
                    241: 	    return 0;
                    242: 	}
                    243: 	my $lines = scalar @contents;
                    244: 	for (my $i =0; $i < $lines; $i++) {
                    245: 	    print $newfh ($contents[$i]);
                    246: 	}
                    247: 
                    248: 	$oldfh->close;
                    249: 	$newfh->close;
                    250: 
                    251: 	chmod(0660, $newfile);
                    252: 
                    253: 	return 1;
                    254: 	    
                    255:     } else {
                    256: 	return 0;
                    257:     }
                    258: }
1.157     foxr      259: #
                    260: #  Host files are passed out with externally visible host IPs.
                    261: #  If, for example, we are behind a fire-wall or NAT host, our 
                    262: #  internally visible IP may be different than the externally
                    263: #  visible IP.  Therefore, we always adjust the contents of the
                    264: #  host file so that the entry for ME is the IP that we believe
                    265: #  we have.  At present, this is defined as the entry that
                    266: #  DNS has for us.  If by some chance we are not able to get a
                    267: #  DNS translation for us, then we assume that the host.tab file
                    268: #  is correct.  
                    269: #    BUGBUGBUG - in the future, we really should see if we can
                    270: #       easily query the interface(s) instead.
                    271: # Parameter(s):
                    272: #     contents    - The contents of the host.tab to check.
                    273: # Returns:
                    274: #     newcontents - The adjusted contents.
                    275: #
                    276: #
                    277: sub AdjustHostContents {
                    278:     my $contents  = shift;
                    279:     my $adjusted;
                    280:     my $me        = $perlvar{'lonHostID'};
                    281: 
                    282:     foreach my $line (split(/\n/,$contents)) {
                    283: 	if(!(($line eq "") || ($line =~ /^ *\#/) || ($line =~ /^ *$/))) {
                    284: 	    chomp($line);
                    285: 	    my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon)=split(/:/,$line);
                    286: 	    if ($id eq $me) {
                    287: 		open(PIPE, " /usr/bin/host $name |") || die "Cant' make host pipeline";
                    288: 		my $hostinfo = <PIPE>;
                    289: 		close PIPE;
                    290: 		
                    291: 		my ($hostname, $has, $address, $ipnew) = split(/ /,$hostinfo);
                    292: 		&logthis('<font color="green">'.
                    293: 			 "hostname = $hostname me = $me, name = $name   actual ip = $ipnew </font>");
                    294: 		
                    295: 		if ($hostname eq $name) { # Lookup succeeded..
                    296: 		    &logthis('<font color="green"> look up ok <font>');
                    297: 		    $ip = $ipnew;
                    298: 		} else {
                    299: 		    &logthis('<font color="green"> Lookup failed: '
                    300: 			     .$hostname." ne $name </font>");
                    301: 		}
                    302: 		#  Reconstruct the host line and append to adjusted:
                    303: 		
                    304: 		my $newline = "$id:$domain:$role:$name:$ip";
                    305: 		if($maxcon ne "") { # Not all hosts have loncnew tuning params
                    306: 		    $newline .= ":$maxcon:$idleto:$mincon";
                    307: 		}
                    308: 		$adjusted .= $newline."\n";
                    309: 		
                    310: 	    } else {		# Not me, pass unmodified.
                    311: 		$adjusted .= $line."\n";
                    312: 	    }
                    313: 	} else {                  # Blank or comment never re-written.
                    314: 	    $adjusted .= $line."\n";	# Pass blanks and comments as is.
                    315: 	}
                    316:     }
                    317:     return $adjusted;
                    318: }
1.143     foxr      319: #
                    320: #   InstallFile: Called to install an administrative file:
                    321: #       - The file is created with <name>.tmp
                    322: #       - The <name>.tmp file is then mv'd to <name>
                    323: #   This lugubrious procedure is done to ensure that we are never without
                    324: #   a valid, even if dated, version of the file regardless of who crashes
                    325: #   and when the crash occurs.
                    326: #
                    327: #  Parameters:
                    328: #       Name of the file
                    329: #       File Contents.
                    330: #  Return:
                    331: #      nonzero - success.
                    332: #      0       - failure and $! has an errno.
                    333: #
                    334: sub InstallFile {
                    335:     my $Filename = shift;
                    336:     my $Contents = shift;
                    337:     my $TempFile = $Filename.".tmp";
                    338: 
                    339:     #  Open the file for write:
                    340: 
                    341:     my $fh = IO::File->new("> $TempFile"); # Write to temp.
                    342:     if(!(defined $fh)) {
                    343: 	&logthis('<font color="red"> Unable to create '.$TempFile."</font>");
                    344: 	return 0;
                    345:     }
                    346:     #  write the contents of the file:
                    347: 
                    348:     print $fh ($Contents); 
                    349:     $fh->close;			# In case we ever have a filesystem w. locking
                    350: 
                    351:     chmod(0660, $TempFile);
                    352: 
                    353:     # Now we can move install the file in position.
                    354:     
                    355:     move($TempFile, $Filename);
                    356: 
                    357:     return 1;
                    358: }
                    359: 
                    360: #
1.141     foxr      361: #   PushFile:  Called to do an administrative push of a file.
                    362: #              - Ensure the file being pushed is one we support.
                    363: #              - Backup the old file to <filename.saved>
                    364: #              - Separate the contents of the new file out from the
                    365: #                rest of the request.
                    366: #              - Write the new file.
                    367: #  Parameter:
                    368: #     Request - The entire user request.  This consists of a : separated
                    369: #               string pushfile:tablename:contents.
                    370: #     NOTE:  The contents may have :'s in it as well making things a bit
                    371: #            more interesting... but not much.
                    372: #  Returns:
                    373: #     String to send to client ("ok" or "refused" if bad file).
                    374: #
                    375: sub PushFile {
                    376:     my $request = shift;    
                    377:     my ($command, $filename, $contents) = split(":", $request, 3);
                    378:     
                    379:     #  At this point in time, pushes for only the following tables are
                    380:     #  supported:
                    381:     #   hosts.tab  ($filename eq host).
                    382:     #   domain.tab ($filename eq domain).
                    383:     # Construct the destination filename or reject the request.
                    384:     #
                    385:     # lonManage is supposed to ensure this, however this session could be
                    386:     # part of some elaborate spoof that managed somehow to authenticate.
                    387:     #
                    388: 
                    389:     my $tablefile = $perlvar{'lonTabDir'}.'/'; # need to precede with dir.
                    390:     if ($filename eq "host") {
                    391: 	$tablefile .= "hosts.tab";
                    392:     } elsif ($filename eq "domain") {
                    393: 	$tablefile .= "domain.tab";
                    394:     } else {
                    395: 	return "refused";
                    396:     }
                    397:     #
                    398:     # >copy< the old table to the backup table
                    399:     #        don't rename in case system crashes/reboots etc. in the time
                    400:     #        window between a rename and write.
                    401:     #
                    402:     my $backupfile = $tablefile;
                    403:     $backupfile    =~ s/\.tab$/.old/;
1.143     foxr      404:     if(!CopyFile($tablefile, $backupfile)) {
                    405: 	&logthis('<font color="green"> CopyFile from '.$tablefile." to ".$backupfile." failed </font>");
                    406: 	return "error:$!";
                    407:     }
1.141     foxr      408:     &logthis('<font color="green"> Pushfile: backed up '
                    409: 	    .$tablefile." to $backupfile</font>");
                    410:     
1.157     foxr      411:     #  If the file being pushed is the host file, we adjust the entry for ourself so that the
                    412:     #  IP will be our current IP as looked up in dns.  Note this is only 99% good as it's possible
                    413:     #  to conceive of conditions where we don't have a DNS entry locally.  This is possible in a 
                    414:     #  network sense but it doesn't make much sense in a LonCAPA sense so we ignore (for now)
                    415:     #  that possibilty.
                    416: 
                    417:     if($filename eq "host") {
                    418: 	$contents = AdjustHostContents($contents);
                    419:     }
                    420: 
1.141     foxr      421:     #  Install the new file:
                    422: 
1.143     foxr      423:     if(!InstallFile($tablefile, $contents)) {
                    424: 	&logthis('<font color="red"> Pushfile: unable to install '
1.145     foxr      425: 	 .$tablefile." $! </font>");
1.143     foxr      426: 	return "error:$!";
                    427:     }
                    428:     else {
                    429: 	&logthis('<font color="green"> Installed new '.$tablefile
                    430: 		 ."</font>");
                    431: 
                    432:     }
                    433: 
1.141     foxr      434: 
                    435:     #  Indicate success:
                    436:  
                    437:     return "ok";
                    438: 
                    439: }
1.145     foxr      440: 
                    441: #
                    442: #  Called to re-init either lonc or lond.
                    443: #
                    444: #  Parameters:
                    445: #    request   - The full request by the client.  This is of the form
                    446: #                reinit:<process>  
                    447: #                where <process> is allowed to be either of 
                    448: #                lonc or lond
                    449: #
                    450: #  Returns:
                    451: #     The string to be sent back to the client either:
                    452: #   ok         - Everything worked just fine.
                    453: #   error:why  - There was a failure and why describes the reason.
                    454: #
                    455: #
                    456: sub ReinitProcess {
                    457:     my $request = shift;
                    458: 
1.146     foxr      459: 
                    460:     # separate the request (reinit) from the process identifier and
                    461:     # validate it producing the name of the .pid file for the process.
                    462:     #
                    463:     #
                    464:     my ($junk, $process) = split(":", $request);
1.147     foxr      465:     my $processpidfile = $perlvar{'lonDaemons'}.'/logs/';
1.146     foxr      466:     if($process eq 'lonc') {
                    467: 	$processpidfile = $processpidfile."lonc.pid";
1.147     foxr      468: 	if (!open(PIDFILE, "< $processpidfile")) {
                    469: 	    return "error:Open failed for $processpidfile";
                    470: 	}
                    471: 	my $loncpid = <PIDFILE>;
                    472: 	close(PIDFILE);
                    473: 	logthis('<font color="red"> Reinitializing lonc pid='.$loncpid
                    474: 		."</font>");
                    475: 	kill("USR2", $loncpid);
1.146     foxr      476:     } elsif ($process eq 'lond') {
1.147     foxr      477: 	logthis('<font color="red"> Reinitializing self (lond) </font>');
                    478: 	&UpdateHosts;			# Lond is us!!
1.146     foxr      479:     } else {
                    480: 	&logthis('<font color="yellow" Invalid reinit request for '.$process
                    481: 		 ."</font>");
                    482: 	return "error:Invalid process identifier $process";
                    483:     }
1.145     foxr      484:     return 'ok';
                    485: }
                    486: 
1.141     foxr      487: #
1.96      foxr      488: #  Convert an error return code from lcpasswd to a string value.
                    489: #
                    490: sub lcpasswdstrerror {
                    491:     my $ErrorCode = shift;
1.97      foxr      492:     if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) {
1.96      foxr      493: 	return "lcpasswd Unrecognized error return value ".$ErrorCode;
                    494:     } else {
1.98      foxr      495: 	return $passwderrors[$ErrorCode];
1.96      foxr      496:     }
                    497: }
                    498: 
1.97      foxr      499: #
                    500: # Convert an error return code from lcuseradd to a string value:
                    501: #
                    502: sub lcuseraddstrerror {
                    503:     my $ErrorCode = shift;
                    504:     if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) {
                    505: 	return "lcuseradd - Unrecognized error code: ".$ErrorCode;
                    506:     } else {
1.98      foxr      507: 	return $adderrors[$ErrorCode];
1.97      foxr      508:     }
                    509: }
                    510: 
1.23      harris41  511: # grabs exception and records it to log before exiting
                    512: sub catchexception {
1.27      albertel  513:     my ($error)=@_;
1.25      www       514:     $SIG{'QUIT'}='DEFAULT';
                    515:     $SIG{__DIE__}='DEFAULT';
1.165     albertel  516:     &status("Catching exception");
1.23      harris41  517:     &logthis("<font color=red>CRITICAL: "
1.134     albertel  518:      ."ABNORMAL EXIT. Child $$ for server $thisserver died through "
1.27      albertel  519:      ."a crash with this error msg->[$error]</font>");
1.57      www       520:     &logthis('Famous last words: '.$status.' - '.$lastlog);
1.27      albertel  521:     if ($client) { print $client "error: $error\n"; }
1.59      www       522:     $server->close();
1.27      albertel  523:     die($error);
1.23      harris41  524: }
                    525: 
1.63      www       526: sub timeout {
1.165     albertel  527:     &status("Handling Timeout");
1.63      www       528:     &logthis("<font color=ref>CRITICAL: TIME OUT ".$$."</font>");
                    529:     &catchexception('Timeout');
                    530: }
1.22      harris41  531: # -------------------------------- Set signal handlers to record abnormal exits
                    532: 
                    533: $SIG{'QUIT'}=\&catchexception;
                    534: $SIG{__DIE__}=\&catchexception;
                    535: 
1.81      matthew   536: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
1.95      harris41  537: &status("Read loncapa.conf and loncapa_apache.conf");
                    538: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
1.141     foxr      539: %perlvar=%{$perlvarref};
1.80      harris41  540: undef $perlvarref;
1.19      www       541: 
1.35      harris41  542: # ----------------------------- Make sure this process is running from user=www
                    543: my $wwwid=getpwnam('www');
                    544: if ($wwwid!=$<) {
1.134     albertel  545:    my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
                    546:    my $subj="LON: $currenthostid User ID mismatch";
1.37      harris41  547:    system("echo 'User ID mismatch.  lond must be run as user www.' |\
1.35      harris41  548:  mailto $emailto -s '$subj' > /dev/null");
                    549:    exit 1;
                    550: }
                    551: 
1.19      www       552: # --------------------------------------------- Check if other instance running
                    553: 
                    554: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid";
                    555: 
                    556: if (-e $pidfile) {
                    557:    my $lfh=IO::File->new("$pidfile");
                    558:    my $pide=<$lfh>;
                    559:    chomp($pide);
1.29      harris41  560:    if (kill 0 => $pide) { die "already running"; }
1.19      www       561: }
1.1       albertel  562: 
                    563: # ------------------------------------------------------------- Read hosts file
                    564: 
                    565: 
                    566: 
                    567: # establish SERVER socket, bind and listen.
                    568: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
                    569:                                 Type      => SOCK_STREAM,
                    570:                                 Proto     => 'tcp',
                    571:                                 Reuse     => 1,
                    572:                                 Listen    => 10 )
1.29      harris41  573:   or die "making socket: $@\n";
1.1       albertel  574: 
                    575: # --------------------------------------------------------- Do global variables
                    576: 
                    577: # global variables
                    578: 
1.134     albertel  579: my %children               = ();       # keys are current child process IDs
                    580: my $children               = 0;        # current number of children
1.1       albertel  581: 
                    582: sub REAPER {                        # takes care of dead children
                    583:     $SIG{CHLD} = \&REAPER;
1.165     albertel  584:     &status("Handling child death");
1.1       albertel  585:     my $pid = wait;
1.67      albertel  586:     if (defined($children{$pid})) {
                    587: 	&logthis("Child $pid died");
                    588: 	$children --;
                    589: 	delete $children{$pid};
                    590:     } else {
                    591: 	&logthis("Unknown Child $pid died");
                    592:     }
1.165     albertel  593:     &status("Finished Handling child death");
1.1       albertel  594: }
                    595: 
                    596: sub HUNTSMAN {                      # signal handler for SIGINT
1.165     albertel  597:     &status("Killing children (INT)");
1.1       albertel  598:     local($SIG{CHLD}) = 'IGNORE';   # we're going to kill our children
                    599:     kill 'INT' => keys %children;
1.59      www       600:     &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.1       albertel  601:     my $execdir=$perlvar{'lonDaemons'};
                    602:     unlink("$execdir/logs/lond.pid");
1.9       www       603:     &logthis("<font color=red>CRITICAL: Shutting down</font>");
1.165     albertel  604:     &status("Done killing children");
1.1       albertel  605:     exit;                           # clean up with dignity
                    606: }
                    607: 
                    608: sub HUPSMAN {                      # signal handler for SIGHUP
                    609:     local($SIG{CHLD}) = 'IGNORE';  # we're going to kill our children
1.165     albertel  610:     &status("Killing children for restart (HUP)");
1.1       albertel  611:     kill 'INT' => keys %children;
1.59      www       612:     &logthis("Free socket: ".shutdown($server,2)); # free up socket
1.9       www       613:     &logthis("<font color=red>CRITICAL: Restarting</font>");
1.134     albertel  614:     my $execdir=$perlvar{'lonDaemons'};
1.30      harris41  615:     unlink("$execdir/logs/lond.pid");
1.165     albertel  616:     &status("Restarting self (HUP)");
1.1       albertel  617:     exec("$execdir/lond");         # here we go again
                    618: }
                    619: 
1.144     foxr      620: #
1.148     foxr      621: #    Kill off hashes that describe the host table prior to re-reading it.
                    622: #    Hashes affected are:
                    623: #       %hostid, %hostdom %hostip
                    624: #
                    625: sub KillHostHashes {
                    626:     foreach my $key (keys %hostid) {
                    627: 	delete $hostid{$key};
                    628:     }
                    629:     foreach my $key (keys %hostdom) {
                    630: 	delete $hostdom{$key};
                    631:     }
                    632:     foreach my $key (keys %hostip) {
                    633: 	delete $hostip{$key};
                    634:     }
                    635: }
                    636: #
                    637: #   Read in the host table from file and distribute it into the various hashes:
                    638: #
                    639: #    - %hostid  -  Indexed by IP, the loncapa hostname.
                    640: #    - %hostdom -  Indexed by  loncapa hostname, the domain.
                    641: #    - %hostip  -  Indexed by hostid, the Ip address of the host.
                    642: sub ReadHostTable {
                    643: 
                    644:     open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
                    645:     
                    646:     while (my $configline=<CONFIG>) {
                    647: 	my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
                    648: 	chomp($ip); $ip=~s/\D+$//;
                    649: 	$hostid{$ip}=$id;
                    650: 	$hostdom{$id}=$domain;
                    651: 	$hostip{$id}=$ip;
                    652: 	if ($id eq $perlvar{'lonHostID'}) { $thisserver=$name; }
                    653:     }
                    654:     close(CONFIG);
                    655: }
                    656: #
                    657: #  Reload the Apache daemon's state.
1.150     foxr      658: #  This is done by invoking /home/httpd/perl/apachereload
                    659: #  a setuid perl script that can be root for us to do this job.
1.148     foxr      660: #
                    661: sub ReloadApache {
1.150     foxr      662:     my $execdir = $perlvar{'lonDaemons'};
                    663:     my $script  = $execdir."/apachereload";
                    664:     system($script);
1.148     foxr      665: }
                    666: 
                    667: #
1.144     foxr      668: #   Called in response to a USR2 signal.
                    669: #   - Reread hosts.tab
                    670: #   - All children connected to hosts that were removed from hosts.tab
                    671: #     are killed via SIGINT
                    672: #   - All children connected to previously existing hosts are sent SIGUSR1
                    673: #   - Our internal hosts hash is updated to reflect the new contents of
                    674: #     hosts.tab causing connections from hosts added to hosts.tab to
                    675: #     now be honored.
                    676: #
                    677: sub UpdateHosts {
1.165     albertel  678:     &status("Reload hosts.tab");
1.147     foxr      679:     logthis('<font color="blue"> Updating connections </font>');
1.148     foxr      680:     #
                    681:     #  The %children hash has the set of IP's we currently have children
                    682:     #  on.  These need to be matched against records in the hosts.tab
                    683:     #  Any ip's no longer in the table get killed off they correspond to
                    684:     #  either dropped or changed hosts.  Note that the re-read of the table
                    685:     #  will take care of new and changed hosts as connections come into being.
                    686: 
                    687: 
                    688:     KillHostHashes;
                    689:     ReadHostTable;
                    690: 
                    691:     foreach my $child (keys %children) {
                    692: 	my $childip = $children{$child};
                    693: 	if(!$hostid{$childip}) {
1.149     foxr      694: 	    logthis('<font color="blue"> UpdateHosts killing child '
                    695: 		    ." $child for ip $childip </font>");
1.148     foxr      696: 	    kill('INT', $child);
1.149     foxr      697: 	} else {
                    698: 	    logthis('<font color="green"> keeping child for ip '
                    699: 		    ." $childip (pid=$child) </font>");
1.148     foxr      700: 	}
                    701:     }
                    702:     ReloadApache;
1.165     albertel  703:     &status("Finished reloading hosts.tab");
1.144     foxr      704: }
                    705: 
1.148     foxr      706: 
1.57      www       707: sub checkchildren {
1.165     albertel  708:     &status("Checking on the children (sending signals)");
1.57      www       709:     &initnewstatus();
                    710:     &logstatus();
                    711:     &logthis('Going to check on the children');
1.134     albertel  712:     my $docdir=$perlvar{'lonDocRoot'};
1.61      harris41  713:     foreach (sort keys %children) {
1.57      www       714: 	sleep 1;
                    715:         unless (kill 'USR1' => $_) {
                    716: 	    &logthis ('Child '.$_.' is dead');
                    717:             &logstatus($$.' is dead');
                    718:         } 
1.61      harris41  719:     }
1.63      www       720:     sleep 5;
1.113     albertel  721:     $SIG{ALRM} = sub { die "timeout" };
                    722:     $SIG{__DIE__} = 'DEFAULT';
1.165     albertel  723:     &status("Checking on the children (waiting for reports)");
1.63      www       724:     foreach (sort keys %children) {
                    725:         unless (-e "$docdir/lon-status/londchld/$_.txt") {
1.113     albertel  726:           eval {
                    727:             alarm(300);
1.63      www       728: 	    &logthis('Child '.$_.' did not respond');
1.67      albertel  729: 	    kill 9 => $_;
1.131     albertel  730: 	    #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
                    731: 	    #$subj="LON: $currenthostid killed lond process $_";
                    732: 	    #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`;
                    733: 	    #$execdir=$perlvar{'lonDaemons'};
                    734: 	    #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`;
1.113     albertel  735: 	    alarm(0);
                    736: 	  }
1.63      www       737:         }
                    738:     }
1.113     albertel  739:     $SIG{ALRM} = 'DEFAULT';
1.155     albertel  740:     $SIG{__DIE__} = \&catchexception;
1.165     albertel  741:     &status("Finished checking children");
1.57      www       742: }
                    743: 
1.1       albertel  744: # --------------------------------------------------------------------- Logging
                    745: 
                    746: sub logthis {
                    747:     my $message=shift;
                    748:     my $execdir=$perlvar{'lonDaemons'};
                    749:     my $fh=IO::File->new(">>$execdir/logs/lond.log");
                    750:     my $now=time;
                    751:     my $local=localtime($now);
1.58      www       752:     $lastlog=$local.': '.$message;
1.1       albertel  753:     print $fh "$local ($$): $message\n";
                    754: }
                    755: 
1.77      foxr      756: # ------------------------- Conditional log if $DEBUG true.
                    757: sub Debug {
                    758:     my $message = shift;
                    759:     if($DEBUG) {
                    760: 	&logthis($message);
                    761:     }
                    762: }
1.161     foxr      763: 
                    764: #
                    765: #   Sub to do replies to client.. this gives a hook for some
                    766: #   debug tracing too:
                    767: #  Parameters:
                    768: #     fd      - File open on client.
                    769: #     reply   - Text to send to client.
                    770: #     request - Original request from client.
                    771: #
                    772: sub Reply {
                    773:     my $fd      = shift;
                    774:     my $reply   = shift;
                    775:     my $request = shift;
                    776: 
                    777:     print $fd $reply;
                    778:     Debug("Request was $request  Reply was $reply");
                    779: 
                    780: }
1.57      www       781: # ------------------------------------------------------------------ Log status
                    782: 
                    783: sub logstatus {
1.165     albertel  784:     &status("Doing logging");
1.57      www       785:     my $docdir=$perlvar{'lonDocRoot'};
1.63      www       786:     {
1.57      www       787:     my $fh=IO::File->new(">>$docdir/lon-status/londstatus.txt");
1.115     albertel  788:     print $fh $$."\t".$currenthostid."\t".$status."\t".$lastlog."\n";
1.63      www       789:     $fh->close();
                    790:     }
1.165     albertel  791:     &status("Finished londstatus.txt");
1.63      www       792:     {
                    793: 	my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
                    794:         print $fh $status."\n".$lastlog."\n".time;
                    795:         $fh->close();
                    796:     }
1.165     albertel  797:     &status("Finished logging");
1.57      www       798: }
                    799: 
                    800: sub initnewstatus {
                    801:     my $docdir=$perlvar{'lonDocRoot'};
                    802:     my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt");
                    803:     my $now=time;
                    804:     my $local=localtime($now);
                    805:     print $fh "LOND status $local - parent $$\n\n";
1.64      www       806:     opendir(DIR,"$docdir/lon-status/londchld");
1.134     albertel  807:     while (my $filename=readdir(DIR)) {
1.64      www       808:         unlink("$docdir/lon-status/londchld/$filename");
                    809:     }
                    810:     closedir(DIR);
1.57      www       811: }
                    812: 
                    813: # -------------------------------------------------------------- Status setting
                    814: 
                    815: sub status {
                    816:     my $what=shift;
                    817:     my $now=time;
                    818:     my $local=localtime($now);
                    819:     $status=$local.': '.$what;
1.103     www       820:     $0='lond: '.$what.' '.$local;
1.57      www       821: }
1.11      www       822: 
                    823: # -------------------------------------------------------- Escape Special Chars
                    824: 
                    825: sub escape {
                    826:     my $str=shift;
                    827:     $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
                    828:     return $str;
                    829: }
                    830: 
                    831: # ----------------------------------------------------- Un-Escape Special Chars
                    832: 
                    833: sub unescape {
                    834:     my $str=shift;
                    835:     $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
                    836:     return $str;
                    837: }
                    838: 
1.1       albertel  839: # ----------------------------------------------------------- Send USR1 to lonc
                    840: 
                    841: sub reconlonc {
                    842:     my $peerfile=shift;
                    843:     &logthis("Trying to reconnect for $peerfile");
                    844:     my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
                    845:     if (my $fh=IO::File->new("$loncfile")) {
                    846: 	my $loncpid=<$fh>;
                    847:         chomp($loncpid);
                    848:         if (kill 0 => $loncpid) {
                    849: 	    &logthis("lonc at pid $loncpid responding, sending USR1");
                    850:             kill USR1 => $loncpid;
                    851:         } else {
1.9       www       852: 	    &logthis(
                    853:               "<font color=red>CRITICAL: "
                    854:              ."lonc at pid $loncpid not responding, giving up</font>");
1.1       albertel  855:         }
                    856:     } else {
1.9       www       857:       &logthis('<font color=red>CRITICAL: lonc not running, giving up</font>');
1.1       albertel  858:     }
                    859: }
                    860: 
                    861: # -------------------------------------------------- Non-critical communication
1.11      www       862: 
1.1       albertel  863: sub subreply {
                    864:     my ($cmd,$server)=@_;
                    865:     my $peerfile="$perlvar{'lonSockDir'}/$server";
                    866:     my $sclient=IO::Socket::UNIX->new(Peer    =>"$peerfile",
                    867:                                       Type    => SOCK_STREAM,
                    868:                                       Timeout => 10)
                    869:        or return "con_lost";
                    870:     print $sclient "$cmd\n";
                    871:     my $answer=<$sclient>;
                    872:     chomp($answer);
                    873:     if (!$answer) { $answer="con_lost"; }
                    874:     return $answer;
                    875: }
                    876: 
                    877: sub reply {
                    878:   my ($cmd,$server)=@_;
                    879:   my $answer;
1.115     albertel  880:   if ($server ne $currenthostid) { 
1.1       albertel  881:     $answer=subreply($cmd,$server);
                    882:     if ($answer eq 'con_lost') {
                    883: 	$answer=subreply("ping",$server);
                    884:         if ($answer ne $server) {
1.115     albertel  885: 	    &logthis("sub reply: answer != server answer is $answer, server is $server");
1.1       albertel  886:            &reconlonc("$perlvar{'lonSockDir'}/$server");
                    887:         }
                    888:         $answer=subreply($cmd,$server);
                    889:     }
                    890:   } else {
                    891:     $answer='self_reply';
                    892:   } 
                    893:   return $answer;
                    894: }
                    895: 
1.13      www       896: # -------------------------------------------------------------- Talk to lonsql
                    897: 
1.12      harris41  898: sub sqlreply {
                    899:     my ($cmd)=@_;
                    900:     my $answer=subsqlreply($cmd);
                    901:     if ($answer eq 'con_lost') { $answer=subsqlreply($cmd); }
                    902:     return $answer;
                    903: }
                    904: 
                    905: sub subsqlreply {
                    906:     my ($cmd)=@_;
                    907:     my $unixsock="mysqlsock";
                    908:     my $peerfile="$perlvar{'lonSockDir'}/$unixsock";
                    909:     my $sclient=IO::Socket::UNIX->new(Peer    =>"$peerfile",
                    910:                                       Type    => SOCK_STREAM,
                    911:                                       Timeout => 10)
                    912:        or return "con_lost";
                    913:     print $sclient "$cmd\n";
                    914:     my $answer=<$sclient>;
                    915:     chomp($answer);
                    916:     if (!$answer) { $answer="con_lost"; }
                    917:     return $answer;
                    918: }
                    919: 
1.1       albertel  920: # -------------------------------------------- Return path to profile directory
1.11      www       921: 
1.1       albertel  922: sub propath {
                    923:     my ($udom,$uname)=@_;
                    924:     $udom=~s/\W//g;
                    925:     $uname=~s/\W//g;
1.16      www       926:     my $subdir=$uname.'__';
1.1       albertel  927:     $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
                    928:     my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
                    929:     return $proname;
                    930: } 
                    931: 
                    932: # --------------------------------------- Is this the home server of an author?
1.11      www       933: 
1.1       albertel  934: sub ishome {
                    935:     my $author=shift;
                    936:     $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
                    937:     my ($udom,$uname)=split(/\//,$author);
                    938:     my $proname=propath($udom,$uname);
                    939:     if (-e $proname) {
                    940: 	return 'owner';
                    941:     } else {
                    942:         return 'not_owner';
                    943:     }
                    944: }
                    945: 
                    946: # ======================================================= Continue main program
                    947: # ---------------------------------------------------- Fork once and dissociate
                    948: 
1.134     albertel  949: my $fpid=fork;
1.1       albertel  950: exit if $fpid;
1.29      harris41  951: die "Couldn't fork: $!" unless defined ($fpid);
1.1       albertel  952: 
1.29      harris41  953: POSIX::setsid() or die "Can't start new session: $!";
1.1       albertel  954: 
                    955: # ------------------------------------------------------- Write our PID on disk
                    956: 
1.134     albertel  957: my $execdir=$perlvar{'lonDaemons'};
1.1       albertel  958: open (PIDSAVE,">$execdir/logs/lond.pid");
                    959: print PIDSAVE "$$\n";
                    960: close(PIDSAVE);
1.9       www       961: &logthis("<font color=red>CRITICAL: ---------- Starting ----------</font>");
1.57      www       962: &status('Starting');
1.1       albertel  963: 
1.106     foxr      964: 
1.1       albertel  965: 
                    966: # ----------------------------------------------------- Install signal handlers
                    967: 
1.57      www       968: 
1.1       albertel  969: $SIG{CHLD} = \&REAPER;
                    970: $SIG{INT}  = $SIG{TERM} = \&HUNTSMAN;
                    971: $SIG{HUP}  = \&HUPSMAN;
1.57      www       972: $SIG{USR1} = \&checkchildren;
1.144     foxr      973: $SIG{USR2} = \&UpdateHosts;
1.106     foxr      974: 
1.148     foxr      975: #  Read the host hashes:
                    976: 
                    977: ReadHostTable;
1.106     foxr      978: 
                    979: # --------------------------------------------------------------
                    980: #   Accept connections.  When a connection comes in, it is validated
                    981: #   and if good, a child process is created to process transactions
                    982: #   along the connection.
                    983: 
1.1       albertel  984: while (1) {
1.165     albertel  985:     &status('Starting accept');
1.106     foxr      986:     $client = $server->accept() or next;
1.165     albertel  987:     &status('Accepted '.$client.' off to spawn');
1.106     foxr      988:     make_new_child($client);
1.165     albertel  989:     &status('Finished spawning');
1.1       albertel  990: }
                    991: 
                    992: sub make_new_child {
                    993:     my $pid;
                    994:     my $cipher;
                    995:     my $sigset;
1.106     foxr      996: 
                    997:     $client = shift;
1.165     albertel  998:     &status('Starting new child '.$client);
1.161     foxr      999:     &logthis('<font color="green"> Attempting to start child ('.$client.
                   1000: 	     ")</font>");    
1.1       albertel 1001:     # block signal for fork
                   1002:     $sigset = POSIX::SigSet->new(SIGINT);
                   1003:     sigprocmask(SIG_BLOCK, $sigset)
1.29      harris41 1004:         or die "Can't block SIGINT for fork: $!\n";
1.134     albertel 1005: 
1.29      harris41 1006:     die "fork: $!" unless defined ($pid = fork);
1.148     foxr     1007: 
                   1008:     $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of
                   1009: 	                               # connection liveness.
                   1010: 
                   1011:     #
                   1012:     #  Figure out who we're talking to so we can record the peer in 
                   1013:     #  the pid hash.
                   1014:     #
                   1015:     my $caller = getpeername($client);
                   1016:     my ($port,$iaddr)=unpack_sockaddr_in($caller);
                   1017:     $clientip=inet_ntoa($iaddr);
1.1       albertel 1018:     
                   1019:     if ($pid) {
                   1020:         # Parent records the child's birth and returns.
                   1021:         sigprocmask(SIG_UNBLOCK, $sigset)
1.29      harris41 1022:             or die "Can't unblock SIGINT for fork: $!\n";
1.148     foxr     1023:         $children{$pid} = $clientip;
1.1       albertel 1024:         $children++;
1.57      www      1025:         &status('Started child '.$pid);
1.1       albertel 1026:         return;
                   1027:     } else {
                   1028:         # Child can *not* return from this subroutine.
                   1029:         $SIG{INT} = 'DEFAULT';      # make SIGINT kill us as it did before
1.126     albertel 1030:         $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns 
                   1031:                                 #don't get intercepted
1.57      www      1032:         $SIG{USR1}= \&logstatus;
1.63      www      1033:         $SIG{ALRM}= \&timeout;
1.57      www      1034:         $lastlog='Forked ';
                   1035:         $status='Forked';
                   1036: 
1.1       albertel 1037:         # unblock signals
                   1038:         sigprocmask(SIG_UNBLOCK, $sigset)
1.29      harris41 1039:             or die "Can't unblock SIGINT for fork: $!\n";
1.13      www      1040: 
1.134     albertel 1041:         my $tmpsnum=0;
1.91      albertel 1042: #---------------------------------------------------- kerberos 5 initialization
                   1043:         &Authen::Krb5::init_context();
                   1044:         &Authen::Krb5::init_ets();
                   1045: 
1.161     foxr     1046: 	&status('Accepted connection');
1.1       albertel 1047: # =============================================================================
                   1048:             # do something with the connection
                   1049: # -----------------------------------------------------------------------------
1.148     foxr     1050: 	# see if we know client and check for spoof IP by challenge
                   1051: 
1.161     foxr     1052: 	ReadManagerTable;	# May also be a manager!!
                   1053: 	
                   1054: 	my $clientrec=($hostid{$clientip}     ne undef);
                   1055: 	my $ismanager=($managers{$clientip}    ne undef);
                   1056: 	$clientname  = "[unknonwn]";
                   1057: 	if($clientrec) {	# Establish client type.
                   1058: 	    $ConnectionType = "client";
                   1059: 	    $clientname = $hostid{$clientip};
                   1060: 	    if($ismanager) {
                   1061: 		$ConnectionType = "both";
                   1062: 	    }
                   1063: 	} else {
                   1064: 	    $ConnectionType = "manager";
                   1065: 	    $clientname = $managers{$clientip};
                   1066: 	}
                   1067: 	my $clientok;
                   1068: 	if ($clientrec || $ismanager) {
                   1069: 	    &status("Waiting for init from $clientip $clientname");
                   1070: 	    &logthis('<font color="yellow">INFO: Connection, '.
                   1071: 		     $clientip.
                   1072: 		  " ($clientname) connection type = $ConnectionType </font>" );
                   1073: 	    &status("Connecting $clientip  ($clientname))"); 
                   1074: 	    my $remotereq=<$client>;
                   1075: 	    $remotereq=~s/[^\w:]//g;
                   1076: 	    if ($remotereq =~ /^init/) {
                   1077: 		&sethost("sethost:$perlvar{'lonHostID'}");
                   1078: 		my $challenge="$$".time;
                   1079: 		print $client "$challenge\n";
                   1080: 		&status(
                   1081: 			"Waiting for challenge reply from $clientip ($clientname)"); 
                   1082: 		$remotereq=<$client>;
                   1083: 		$remotereq=~s/\W//g;
                   1084: 		if ($challenge eq $remotereq) {
                   1085: 		    $clientok=1;
                   1086: 		    print $client "ok\n";
                   1087: 		} else {
                   1088: 		    &logthis(
                   1089: 			     "<font color=blue>WARNING: $clientip did not reply challenge</font>");
                   1090: 		    &status('No challenge reply '.$clientip);
                   1091: 		}
1.2       www      1092: 	    } else {
1.161     foxr     1093: 		&logthis(
                   1094: 			 "<font color=blue>WARNING: "
                   1095: 			 ."$clientip failed to initialize: >$remotereq< </font>");
                   1096: 		&status('No init '.$clientip);
                   1097: 	    }
                   1098: 	} else {
                   1099: 	    &logthis(
                   1100: 		     "<font color=blue>WARNING: Unknown client $clientip</font>");
                   1101: 	    &status('Hung up on '.$clientip);
                   1102: 	}
                   1103: 	if ($clientok) {
1.1       albertel 1104: # ---------------- New known client connecting, could mean machine online again
1.161     foxr     1105: 	    
                   1106: 	    foreach my $id (keys(%hostip)) {
                   1107: 		if ($hostip{$id} ne $clientip ||
                   1108: 		    $hostip{$currenthostid} eq $clientip) {
                   1109: 		    # no need to try to do recon's to myself
                   1110: 		    next;
1.115     albertel 1111: 		}
1.161     foxr     1112: 		&reconlonc("$perlvar{'lonSockDir'}/$id");
                   1113: 	    }
                   1114: 	    &logthis("<font color=green>Established connection: $clientname</font>");
                   1115: 	    &status('Will listen to '.$clientname);
1.1       albertel 1116: # ------------------------------------------------------------ Process requests
1.161     foxr     1117: 	    while (my $userinput=<$client>) {
1.1       albertel 1118:                 chomp($userinput);
1.79      foxr     1119: 		Debug("Request = $userinput\n");
1.161     foxr     1120:                 &status('Processing '.$clientname.': '.$userinput);
1.1       albertel 1121:                 my $wasenc=0;
1.63      www      1122:                 alarm(120);
1.1       albertel 1123: # ------------------------------------------------------------ See if encrypted
                   1124: 		if ($userinput =~ /^enc/) {
1.161     foxr     1125: 		    if ($cipher) {
                   1126: 			my ($cmd,$cmdlength,$encinput)=split(/:/,$userinput);
                   1127: 			$userinput='';
                   1128: 			for (my $encidx=0;$encidx<length($encinput);$encidx+=16) {
                   1129: 			    $userinput.=
                   1130: 				$cipher->decrypt(
                   1131: 						 pack("H16",substr($encinput,$encidx,16))
                   1132: 						 );
                   1133: 			}
                   1134: 			$userinput=substr($userinput,0,$cmdlength);
                   1135: 			$wasenc=1;
1.1       albertel 1136: 		    }
                   1137: 		}
1.161     foxr     1138: 		
1.1       albertel 1139: # ------------------------------------------------------------- Normal commands
                   1140: # ------------------------------------------------------------------------ ping
1.161     foxr     1141: 		if ($userinput =~ /^ping/) {	# client only
                   1142: 		    if(isClient) {
                   1143: 			print $client "$currenthostid\n";
                   1144: 		    } else {
                   1145: 			Reply($client, "refused\n", $userinput);
                   1146: 		    }
1.1       albertel 1147: # ------------------------------------------------------------------------ pong
1.161     foxr     1148: 		}elsif ($userinput =~ /^pong/) { # client only
                   1149: 		    if(isClient) {
                   1150: 			my $reply=&reply("ping",$clientname);
                   1151: 			print $client "$currenthostid:$reply\n"; 
                   1152: 		    } else {
                   1153: 			Reply($client, "refused\n", $userinput);
                   1154: 		    }
1.1       albertel 1155: # ------------------------------------------------------------------------ ekey
1.161     foxr     1156: 		} elsif ($userinput =~ /^ekey/) { # ok for both clients & mgrs
                   1157: 		    my $buildkey=time.$$.int(rand 100000);
                   1158: 		    $buildkey=~tr/1-6/A-F/;
                   1159: 		    $buildkey=int(rand 100000).$buildkey.int(rand 100000);
                   1160: 		    my $key=$currenthostid.$clientname;
                   1161: 		    $key=~tr/a-z/A-Z/;
                   1162: 		    $key=~tr/G-P/0-9/;
                   1163: 		    $key=~tr/Q-Z/0-9/;
                   1164: 		    $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
                   1165: 		    $key=substr($key,0,32);
                   1166: 		    my $cipherkey=pack("H32",$key);
                   1167: 		    $cipher=new IDEA $cipherkey;
                   1168: 		    print $client "$buildkey\n"; 
1.1       albertel 1169: # ------------------------------------------------------------------------ load
1.161     foxr     1170: 		} elsif ($userinput =~ /^load/) { # client only
                   1171: 		    if (isClient) {
                   1172: 			my $loadavg;
                   1173: 			{
                   1174: 			    my $loadfile=IO::File->new('/proc/loadavg');
                   1175: 			    $loadavg=<$loadfile>;
                   1176: 			}
                   1177: 			$loadavg =~ s/\s.*//g;
                   1178: 			my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
                   1179: 			print $client "$loadpercent\n";
                   1180: 		    } else {
                   1181: 			Reply($client, "refused\n", $userinput);
                   1182: 	       
                   1183: 		    }
1.127     albertel 1184: # -------------------------------------------------------------------- userload
1.161     foxr     1185: 		} elsif ($userinput =~ /^userload/) { # client only
                   1186: 		    if(isClient) {
                   1187: 			my $userloadpercent=&userload();
                   1188: 			print $client "$userloadpercent\n";
                   1189: 		    } else {
                   1190: 			Reply($client, "refused\n", $userinput);
                   1191: 		     
                   1192: 		    }
1.137     foxr     1193: #
                   1194: #        Transactions requiring encryption:
                   1195: #
1.54      harris41 1196: # ----------------------------------------------------------------- currentauth
1.161     foxr     1197: 		} elsif ($userinput =~ /^currentauth/) {
                   1198: 		    if (($wasenc==1)  && isClient) { # Encoded & client only.
                   1199: 			my ($cmd,$udom,$uname)=split(/:/,$userinput);
                   1200: 			my $result = GetAuthType($udom, $uname);
                   1201: 			if($result eq "nouser") {
                   1202: 			    print $client "unknown_user\n";
                   1203: 			}
                   1204: 			else {
                   1205: 			    print $client "$result\n"
                   1206: 			    }
                   1207: 		    } else {
                   1208: 			Reply($client, "refused\n", $userinput);
                   1209: 			
                   1210: 		    }
1.137     foxr     1211: #--------------------------------------------------------------------- pushfile
1.161     foxr     1212: 		} elsif($userinput =~ /^pushfile/) {	# encoded & manager.
                   1213: 		    if(($wasenc == 1) && isManager) {
                   1214: 			my $cert = GetCertificate($userinput);
                   1215: 			if(ValidManager($cert)) {
                   1216: 			    my $reply = PushFile($userinput);
                   1217: 			    print $client "$reply\n";
                   1218: 			} else {
                   1219: 			    print $client "refused\n";
                   1220: 			} 
                   1221: 		    } else {
                   1222: 			Reply($client, "refused\n", $userinput);
                   1223: 			
                   1224: 		    }
1.137     foxr     1225: #--------------------------------------------------------------------- reinit
1.161     foxr     1226: 		} elsif($userinput =~ /^reinit/) { # Encoded and manager
                   1227: 		    if (($wasenc == 1) && isManager) {
                   1228: 			my $cert = GetCertificate($userinput);
                   1229: 			if(ValidManager($cert)) {
                   1230: 			    chomp($userinput);
                   1231: 			    my $reply = ReinitProcess($userinput);
                   1232: 			    print $client  "$reply\n";
                   1233: 			} else {
                   1234: 			    print $client "refused\n";
                   1235: 			}
                   1236: 		    } else {
                   1237: 			Reply($client, "refused\n", $userinput);
                   1238: 
                   1239: 
                   1240: 		    }
1.1       albertel 1241: # ------------------------------------------------------------------------ auth
1.161     foxr     1242: 		} elsif ($userinput =~ /^auth/) { # Encoded and client only.
                   1243: 		    if (($wasenc==1) && isClient) {
                   1244: 			my ($cmd,$udom,$uname,$upass)=split(/:/,$userinput);
                   1245: 			chomp($upass);
                   1246: 			$upass=unescape($upass);
                   1247: 			my $proname=propath($udom,$uname);
                   1248: 			my $passfilename="$proname/passwd";
                   1249: 			if (-e $passfilename) {
                   1250: 			    my $pf = IO::File->new($passfilename);
                   1251: 			    my $realpasswd=<$pf>;
                   1252: 			    chomp($realpasswd);
                   1253: 			    my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
                   1254: 			    my $pwdcorrect=0;
                   1255: 			    if ($howpwd eq 'internal') {
                   1256: 				&Debug("Internal auth");
                   1257: 				$pwdcorrect=
                   1258: 				    (crypt($upass,$contentpwd) eq $contentpwd);
                   1259: 			    } elsif ($howpwd eq 'unix') {
                   1260: 				&Debug("Unix auth");
                   1261: 				if((getpwnam($uname))[1] eq "") { #no such user!
                   1262: 				    $pwdcorrect = 0;
                   1263: 				} else {
                   1264: 				    $contentpwd=(getpwnam($uname))[1];
                   1265: 				    my $pwauth_path="/usr/local/sbin/pwauth";
                   1266: 				    unless ($contentpwd eq 'x') {
                   1267: 					$pwdcorrect=
                   1268: 					    (crypt($upass,$contentpwd) eq 
                   1269: 					     $contentpwd);
                   1270: 				    }
                   1271: 				    
                   1272: 				    elsif (-e $pwauth_path) {
                   1273: 					open PWAUTH, "|$pwauth_path" or
                   1274: 					    die "Cannot invoke authentication";
                   1275: 					print PWAUTH "$uname\n$upass\n";
                   1276: 					close PWAUTH;
                   1277: 					$pwdcorrect=!$?;
                   1278: 				    }
                   1279: 				}
                   1280: 			    } elsif ($howpwd eq 'krb4') {
                   1281: 				my $null=pack("C",0);
                   1282: 				unless ($upass=~/$null/) {
                   1283: 				    my $krb4_error = &Authen::Krb4::get_pw_in_tkt
                   1284: 					($uname,"",$contentpwd,'krbtgt',
                   1285: 					 $contentpwd,1,$upass);
                   1286: 				    if (!$krb4_error) {
                   1287: 					$pwdcorrect = 1;
                   1288: 				    } else { 
                   1289: 					$pwdcorrect=0; 
                   1290: 					# log error if it is not a bad password
                   1291: 					if ($krb4_error != 62) {
                   1292: 					    &logthis('krb4:'.$uname.','.$contentpwd.','.
                   1293: 						     &Authen::Krb4::get_err_txt($Authen::Krb4::error));
                   1294: 					}
                   1295: 				    }
                   1296: 				}
                   1297: 			    } elsif ($howpwd eq 'krb5') {
                   1298: 				my $null=pack("C",0);
                   1299: 				unless ($upass=~/$null/) {
                   1300: 				    my $krbclient=&Authen::Krb5::parse_name($uname.'@'.$contentpwd);
                   1301: 				    my $krbservice="krbtgt/".$contentpwd."\@".$contentpwd;
                   1302: 				    my $krbserver=&Authen::Krb5::parse_name($krbservice);
                   1303: 				    my $credentials=&Authen::Krb5::cc_default();
                   1304: 				    $credentials->initialize($krbclient);
                   1305: 				    my $krbreturn = 
                   1306: 					&Authen::Krb5::get_in_tkt_with_password(
                   1307: 										$krbclient,$krbserver,$upass,$credentials);
1.92      albertel 1308: #				  unless ($krbreturn) {
                   1309: #				      &logthis("Krb5 Error: ".
                   1310: #					       &Authen::Krb5::error());
                   1311: #				  }
1.161     foxr     1312: 				    $pwdcorrect = ($krbreturn == 1);
                   1313: 				} else { $pwdcorrect=0; }
                   1314: 			    } elsif ($howpwd eq 'localauth') {
                   1315: 				$pwdcorrect=&localauth::localauth($uname,$upass,
                   1316: 								  $contentpwd);
                   1317: 			    }
                   1318: 			    if ($pwdcorrect) {
                   1319: 				print $client "authorized\n";
                   1320: 			    } else {
                   1321: 				print $client "non_authorized\n";
                   1322: 			    }  
                   1323: 			} else {
                   1324: 			    print $client "unknown_user\n";
                   1325: 			}
                   1326: 		    } else {
                   1327: 			Reply($client, "refused\n", $userinput);
                   1328: 		       
                   1329: 		    }
1.1       albertel 1330: # ---------------------------------------------------------------------- passwd
1.161     foxr     1331: 		} elsif ($userinput =~ /^passwd/) { # encoded and client
                   1332: 		    if (($wasenc==1) && isClient) {
                   1333: 			my 
                   1334: 			    ($cmd,$udom,$uname,$upass,$npass)=split(/:/,$userinput);
                   1335: 			chomp($npass);
                   1336: 			$upass=&unescape($upass);
                   1337: 			$npass=&unescape($npass);
                   1338: 			&Debug("Trying to change password for $uname");
                   1339: 			my $proname=propath($udom,$uname);
                   1340: 			my $passfilename="$proname/passwd";
                   1341: 			if (-e $passfilename) {
                   1342: 			    my $realpasswd;
                   1343: 			    { my $pf = IO::File->new($passfilename);
                   1344: 			      $realpasswd=<$pf>; }
                   1345: 			    chomp($realpasswd);
                   1346: 			    my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
                   1347: 			    if ($howpwd eq 'internal') {
                   1348: 				&Debug("internal auth");
                   1349: 				if (crypt($upass,$contentpwd) eq $contentpwd) {
                   1350: 				    my $salt=time;
                   1351: 				    $salt=substr($salt,6,2);
                   1352: 				    my $ncpass=crypt($npass,$salt);
                   1353: 				    {
                   1354: 					my $pf;
                   1355: 					if ($pf = IO::File->new(">$passfilename")) {
                   1356: 					    print $pf "internal:$ncpass\n";
                   1357: 					    &logthis("Result of password change for $uname: pwchange_success");
                   1358: 					    print $client "ok\n";
                   1359: 					} else {
                   1360: 					    &logthis("Unable to open $uname passwd to change password");
                   1361: 					    print $client "non_authorized\n";
                   1362: 					}
                   1363: 				    }             
                   1364: 				    
                   1365: 				} else {
                   1366: 				    print $client "non_authorized\n";
                   1367: 				}
                   1368: 			    } elsif ($howpwd eq 'unix') {
                   1369: 				# Unix means we have to access /etc/password
                   1370: 				# one way or another.
                   1371: 				# First: Make sure the current password is
                   1372: 				#        correct
                   1373: 				&Debug("auth is unix");
                   1374: 				$contentpwd=(getpwnam($uname))[1];
                   1375: 				my $pwdcorrect = "0";
                   1376: 				my $pwauth_path="/usr/local/sbin/pwauth";
                   1377: 				unless ($contentpwd eq 'x') {
                   1378: 				    $pwdcorrect=
                   1379: 					(crypt($upass,$contentpwd) eq $contentpwd);
                   1380: 				} elsif (-e $pwauth_path) {
                   1381: 				    open PWAUTH, "|$pwauth_path" or
                   1382: 					die "Cannot invoke authentication";
                   1383: 				    print PWAUTH "$uname\n$upass\n";
                   1384: 				    close PWAUTH;
                   1385: 				    &Debug("exited pwauth with $? ($uname,$upass) ");
                   1386: 				    $pwdcorrect=($? == 0);
                   1387: 				}
                   1388: 				if ($pwdcorrect) {
                   1389: 				    my $execdir=$perlvar{'lonDaemons'};
                   1390: 				    &Debug("Opening lcpasswd pipeline");
                   1391: 				    my $pf = IO::File->new("|$execdir/lcpasswd > $perlvar{'lonDaemons'}/logs/lcpasswd.log");
                   1392: 				    print $pf "$uname\n$npass\n$npass\n";
                   1393: 				    close $pf;
                   1394: 				    my $err = $?;
                   1395: 				    my $result = ($err>0 ? 'pwchange_failure' 
                   1396: 						  : 'ok');
                   1397: 				    &logthis("Result of password change for $uname: ".
                   1398: 					     &lcpasswdstrerror($?));
                   1399: 				    print $client "$result\n";
                   1400: 				} else {
                   1401: 				    print $client "non_authorized\n";
                   1402: 				}
                   1403: 			    } else {
                   1404: 				print $client "auth_mode_error\n";
                   1405: 			    }  
                   1406: 			} else {
                   1407: 			    print $client "unknown_user\n";
                   1408: 			}
                   1409: 		    } else {
                   1410: 			Reply($client, "refused\n", $userinput);
                   1411: 		       
                   1412: 		    }
1.31      www      1413: # -------------------------------------------------------------------- makeuser
1.161     foxr     1414: 		} elsif ($userinput =~ /^makeuser/) { # encoded and client.
                   1415: 		    &Debug("Make user received");
                   1416: 		    my $oldumask=umask(0077);
                   1417: 		    if (($wasenc==1) && isClient) {
                   1418: 			my 
                   1419: 			    ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
                   1420: 			&Debug("cmd =".$cmd." $udom =".$udom.
                   1421: 			       " uname=".$uname);
                   1422: 			chomp($npass);
                   1423: 			$npass=&unescape($npass);
                   1424: 			my $proname=propath($udom,$uname);
                   1425: 			my $passfilename="$proname/passwd";
                   1426: 			&Debug("Password file created will be:".
                   1427: 			       $passfilename);
                   1428: 			if (-e $passfilename) {
                   1429: 			    print $client "already_exists\n";
                   1430: 			} elsif ($udom ne $currentdomainid) {
                   1431: 			    print $client "not_right_domain\n";
                   1432: 			} else {
                   1433: 			    my @fpparts=split(/\//,$proname);
                   1434: 			    my $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2];
                   1435: 			    my $fperror='';
                   1436: 			    for (my $i=3;$i<=$#fpparts;$i++) {
                   1437: 				$fpnow.='/'.$fpparts[$i]; 
                   1438: 				unless (-e $fpnow) {
                   1439: 				    unless (mkdir($fpnow,0777)) {
                   1440: 					$fperror="error: ".($!+0)
                   1441: 					    ." mkdir failed while attempting "
1.165.2.1  albertel 1442: 					    ."makeuser";
1.161     foxr     1443: 				    }
                   1444: 				}
                   1445: 			    }
                   1446: 			    unless ($fperror) {
                   1447: 				my $result=&make_passwd_file($uname, $umode,$npass,
                   1448: 							     $passfilename);
                   1449: 				print $client $result;
                   1450: 			    } else {
                   1451: 				print $client "$fperror\n";
                   1452: 			    }
                   1453: 			}
                   1454: 		    } else {
                   1455: 			Reply($client, "refused\n", $userinput);
                   1456: 	      
                   1457: 		    }
                   1458: 		    umask($oldumask);
1.55      harris41 1459: # -------------------------------------------------------------- changeuserauth
1.161     foxr     1460: 		} elsif ($userinput =~ /^changeuserauth/) { # encoded & client
                   1461: 		    &Debug("Changing authorization");
                   1462: 		    if (($wasenc==1) && isClient) {
                   1463: 			my 
                   1464: 			    ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
                   1465: 			chomp($npass);
                   1466: 			&Debug("cmd = ".$cmd." domain= ".$udom.
                   1467: 			       "uname =".$uname." umode= ".$umode);
                   1468: 			$npass=&unescape($npass);
                   1469: 			my $proname=&propath($udom,$uname);
                   1470: 			my $passfilename="$proname/passwd";
                   1471: 			if ($udom ne $currentdomainid) {
                   1472: 			    print $client "not_right_domain\n";
                   1473: 			} else {
                   1474: 			    my $result=&make_passwd_file($uname, $umode,$npass,
                   1475: 							 $passfilename);
                   1476: 			    print $client $result;
                   1477: 			}
                   1478: 		    } else {
                   1479: 			Reply($client, "refused\n", $userinput);
                   1480: 		   
                   1481: 		    }
1.1       albertel 1482: # ------------------------------------------------------------------------ home
1.161     foxr     1483: 		} elsif ($userinput =~ /^home/) { # client clear or encoded
                   1484: 		    if(isClient) {
                   1485: 			my ($cmd,$udom,$uname)=split(/:/,$userinput);
                   1486: 			chomp($uname);
                   1487: 			my $proname=propath($udom,$uname);
                   1488: 			if (-e $proname) {
                   1489: 			    print $client "found\n";
                   1490: 			} else {
                   1491: 			    print $client "not_found\n";
                   1492: 			}
                   1493: 		    } else {
                   1494: 			Reply($client, "refused\n", $userinput);
                   1495: 
                   1496: 		    }
1.1       albertel 1497: # ---------------------------------------------------------------------- update
1.161     foxr     1498: 		} elsif ($userinput =~ /^update/) { # client clear or encoded.
                   1499: 		    if(isClient) {
                   1500: 			my ($cmd,$fname)=split(/:/,$userinput);
                   1501: 			my $ownership=ishome($fname);
                   1502: 			if ($ownership eq 'not_owner') {
                   1503: 			    if (-e $fname) {
                   1504: 				my ($dev,$ino,$mode,$nlink,
                   1505: 				    $uid,$gid,$rdev,$size,
                   1506: 				    $atime,$mtime,$ctime,
                   1507: 				    $blksize,$blocks)=stat($fname);
                   1508: 				my $now=time;
                   1509: 				my $since=$now-$atime;
                   1510: 				if ($since>$perlvar{'lonExpire'}) {
                   1511: 				    my $reply=
                   1512: 					&reply("unsub:$fname","$clientname");
                   1513: 				    unlink("$fname");
                   1514: 				} else {
                   1515: 				    my $transname="$fname.in.transfer";
                   1516: 				    my $remoteurl=
                   1517: 					&reply("sub:$fname","$clientname");
                   1518: 				    my $response;
                   1519: 				    {
                   1520: 					my $ua=new LWP::UserAgent;
                   1521: 					my $request=new HTTP::Request('GET',"$remoteurl");
                   1522: 					$response=$ua->request($request,$transname);
                   1523: 				    }
                   1524: 				    if ($response->is_error()) {
                   1525: 					unlink($transname);
                   1526: 					my $message=$response->status_line;
                   1527: 					&logthis(
                   1528: 						 "LWP GET: $message for $fname ($remoteurl)");
                   1529: 				    } else {
                   1530: 					if ($remoteurl!~/\.meta$/) {
                   1531: 					    my $ua=new LWP::UserAgent;
                   1532: 					    my $mrequest=
                   1533: 						new HTTP::Request('GET',$remoteurl.'.meta');
                   1534: 					    my $mresponse=
                   1535: 						$ua->request($mrequest,$fname.'.meta');
                   1536: 					    if ($mresponse->is_error()) {
                   1537: 						unlink($fname.'.meta');
                   1538: 					    }
                   1539: 					}
                   1540: 					rename($transname,$fname);
                   1541: 				    }
                   1542: 				}
                   1543: 				print $client "ok\n";
                   1544: 			    } else {
                   1545: 				print $client "not_found\n";
                   1546: 			    }
                   1547: 			} else {
                   1548: 			    print $client "rejected\n";
                   1549: 			}
                   1550: 		    } else {
                   1551: 			Reply($client, "refused\n", $userinput);
                   1552: 
                   1553: 		    }
1.85      www      1554: # -------------------------------------- fetch a user file from a remote server
1.161     foxr     1555: 		} elsif ($userinput =~ /^fetchuserfile/) { # Client clear or enc.
                   1556: 		    if(isClient) {
                   1557: 			my ($cmd,$fname)=split(/:/,$userinput);
                   1558: 			my ($udom,$uname,$ufile)=split(/\//,$fname);
                   1559: 			my $udir=propath($udom,$uname).'/userfiles';
                   1560: 			unless (-e $udir) { mkdir($udir,0770); }
                   1561: 			if (-e $udir) {
                   1562: 			    $ufile=~s/^[\.\~]+//;
                   1563: 			    $ufile=~s/\///g;
                   1564: 			    my $destname=$udir.'/'.$ufile;
                   1565: 			    my $transname=$udir.'/'.$ufile.'.in.transit';
                   1566: 			    my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
                   1567: 			    my $response;
                   1568: 			    {
                   1569: 				my $ua=new LWP::UserAgent;
                   1570: 				my $request=new HTTP::Request('GET',"$remoteurl");
                   1571: 				$response=$ua->request($request,$transname);
                   1572: 			    }
                   1573: 			    if ($response->is_error()) {
                   1574: 				unlink($transname);
                   1575: 				my $message=$response->status_line;
                   1576: 				&logthis("LWP GET: $message for $fname ($remoteurl)");
                   1577: 				print $client "failed\n";
                   1578: 			    } else {
                   1579: 				if (!rename($transname,$destname)) {
                   1580: 				    &logthis("Unable to move $transname to $destname");
                   1581: 				    unlink($transname);
                   1582: 				    print $client "failed\n";
                   1583: 				} else {
                   1584: 				    print $client "ok\n";
                   1585: 				}
                   1586: 			    }
                   1587: 			} else {
                   1588: 			    print $client "not_home\n";
                   1589: 			}
                   1590: 		    } else {
                   1591: 			Reply($client, "refused\n", $userinput);
                   1592: 
                   1593: 		    }
1.85      www      1594: # ------------------------------------------ authenticate access to a user file
1.161     foxr     1595: 		} elsif ($userinput =~ /^tokenauthuserfile/) { # Client only
                   1596: 		    if(isClient) {
                   1597: 			my ($cmd,$fname,$session)=split(/:/,$userinput);
                   1598: 			chomp($session);
                   1599: 			my $reply='non_auth';
                   1600: 			if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
                   1601: 				 $session.'.id')) {
                   1602: 			    while (my $line=<ENVIN>) {
                   1603: 				if ($line=~/userfile\.$fname\=/) { $reply='ok'; }
                   1604: 			    }
                   1605: 			    close(ENVIN);
                   1606: 			    print $client $reply."\n";
                   1607: 			} else {
                   1608: 			    print $client "invalid_token\n";
                   1609: 			}
                   1610: 		    } else {
                   1611: 			Reply($client, "refused\n", $userinput);
                   1612: 
                   1613: 		    }
1.1       albertel 1614: # ----------------------------------------------------------------- unsubscribe
1.161     foxr     1615: 		} elsif ($userinput =~ /^unsub/) {
                   1616: 		    if(isClient) {
                   1617: 			my ($cmd,$fname)=split(/:/,$userinput);
                   1618: 			if (-e $fname) {
                   1619: 			    print $client &unsub($client,$fname,$clientip);
                   1620: 			} else {
                   1621: 			    print $client "not_found\n";
                   1622: 			}
                   1623: 		    } else {
                   1624: 			Reply($client, "refused\n", $userinput);
                   1625: 
                   1626: 		    }
1.1       albertel 1627: # ------------------------------------------------------------------- subscribe
1.161     foxr     1628: 		} elsif ($userinput =~ /^sub/) {
                   1629: 		    if(isClient) {
                   1630: 			print $client &subscribe($userinput,$clientip);
                   1631: 		    } else {
                   1632: 			Reply($client, "refused\n", $userinput);
                   1633: 
                   1634: 		    }
1.102     www      1635: # ------------------------------------------------------------- current version
1.161     foxr     1636: 		} elsif ($userinput =~ /^currentversion/) {
                   1637: 		    if(isClient) {
                   1638: 			my ($cmd,$fname)=split(/:/,$userinput);
                   1639: 			print $client &currentversion($fname)."\n";
                   1640: 		    } else {
                   1641: 			Reply($client, "refused\n", $userinput);
                   1642: 
                   1643: 		    }
1.12      harris41 1644: # ------------------------------------------------------------------------- log
1.161     foxr     1645: 		} elsif ($userinput =~ /^log/) {
                   1646: 		    if(isClient) {
                   1647: 			my ($cmd,$udom,$uname,$what)=split(/:/,$userinput);
                   1648: 			chomp($what);
                   1649: 			my $proname=propath($udom,$uname);
                   1650: 			my $now=time;
                   1651: 			{
                   1652: 			    my $hfh;
                   1653: 			    if ($hfh=IO::File->new(">>$proname/activity.log")) { 
                   1654: 				print $hfh "$now:$clientname:$what\n";
                   1655: 				print $client "ok\n"; 
                   1656: 			    } else {
                   1657: 				print $client "error: ".($!+0)
                   1658: 				    ." IO::File->new Failed "
                   1659: 				    ."while attempting log\n";
                   1660: 			    }
                   1661: 			}
                   1662: 		    } else {
                   1663: 			Reply($client, "refused\n", $userinput);
                   1664: 
                   1665: 		    }
1.1       albertel 1666: # ------------------------------------------------------------------------- put
1.161     foxr     1667: 		} elsif ($userinput =~ /^put/) {
                   1668: 		    if(isClient) {
                   1669: 			my ($cmd,$udom,$uname,$namespace,$what)
                   1670: 			    =split(/:/,$userinput);
                   1671: 			$namespace=~s/\//\_/g;
                   1672: 			$namespace=~s/\W//g;
                   1673: 			if ($namespace ne 'roles') {
                   1674: 			    chomp($what);
                   1675: 			    my $proname=propath($udom,$uname);
                   1676: 			    my $now=time;
                   1677: 			    unless ($namespace=~/^nohist\_/) {
                   1678: 				my $hfh;
                   1679: 				if (
                   1680: 				    $hfh=IO::File->new(">>$proname/$namespace.hist")
                   1681: 				    ) { print $hfh "P:$now:$what\n"; }
                   1682: 			    }
                   1683: 			    my @pairs=split(/\&/,$what);
                   1684: 			    my %hash;
                   1685: 			    if (tie(%hash,'GDBM_File',
                   1686: 				    "$proname/$namespace.db",
                   1687: 				    &GDBM_WRCREAT(),0640)) {
                   1688: 				foreach my $pair (@pairs) {
                   1689: 				    my ($key,$value)=split(/=/,$pair);
                   1690: 				    $hash{$key}=$value;
1.162     matthew  1691: 				}
                   1692: 				if (untie(%hash)) {
                   1693: 				    print $client "ok\n";
                   1694: 				} else {
                   1695: 				    print $client "error: ".($!+0)
                   1696: 					." untie(GDBM) failed ".
                   1697: 					"while attempting put\n";
                   1698: 				}
                   1699: 			    } else {
                   1700: 				print $client "error: ".($!)
                   1701: 				    ." tie(GDBM) Failed ".
                   1702: 				    "while attempting put\n";
                   1703: 			    }
                   1704: 			} else {
                   1705: 			    print $client "refused\n";
                   1706: 			}
                   1707: 		    } else {
                   1708: 			Reply($client, "refused\n", $userinput);
                   1709: 
                   1710: 		    }
                   1711: # ------------------------------------------------------------------- inc
                   1712: 		} elsif ($userinput =~ /^inc:/) {
                   1713: 		    if(isClient) {
                   1714: 			my ($cmd,$udom,$uname,$namespace,$what)
                   1715: 			    =split(/:/,$userinput);
                   1716: 			$namespace=~s/\//\_/g;
                   1717: 			$namespace=~s/\W//g;
                   1718: 			if ($namespace ne 'roles') {
                   1719: 			    chomp($what);
                   1720: 			    my $proname=propath($udom,$uname);
                   1721: 			    my $now=time;
                   1722: 			    unless ($namespace=~/^nohist\_/) {
                   1723: 				my $hfh;
                   1724: 				if (
                   1725: 				    $hfh=IO::File->new(">>$proname/$namespace.hist")
                   1726: 				    ) { print $hfh "P:$now:$what\n"; }
                   1727: 			    }
                   1728: 			    my @pairs=split(/\&/,$what);
                   1729: 			    my %hash;
                   1730: 			    if (tie(%hash,'GDBM_File',
                   1731: 				    "$proname/$namespace.db",
                   1732: 				    &GDBM_WRCREAT(),0640)) {
                   1733: 				foreach my $pair (@pairs) {
                   1734: 				    my ($key,$value)=split(/=/,$pair);
                   1735:                                     # We could check that we have a number...
                   1736:                                     if (! defined($value) || $value eq '') {
                   1737:                                         $value = 1;
                   1738:                                     }
                   1739: 				    $hash{$key}+=$value;
1.161     foxr     1740: 				}
                   1741: 				if (untie(%hash)) {
                   1742: 				    print $client "ok\n";
                   1743: 				} else {
                   1744: 				    print $client "error: ".($!+0)
                   1745: 					." untie(GDBM) failed ".
                   1746: 					"while attempting put\n";
                   1747: 				}
                   1748: 			    } else {
                   1749: 				print $client "error: ".($!)
                   1750: 				    ." tie(GDBM) Failed ".
                   1751: 				    "while attempting put\n";
                   1752: 			    }
                   1753: 			} else {
                   1754: 			    print $client "refused\n";
                   1755: 			}
                   1756: 		    } else {
                   1757: 			Reply($client, "refused\n", $userinput);
                   1758: 
                   1759: 		    }
1.6       www      1760: # -------------------------------------------------------------------- rolesput
1.161     foxr     1761: 		} elsif ($userinput =~ /^rolesput/) {
                   1762: 		    if(isClient) {
                   1763: 			&Debug("rolesput");
                   1764: 			if ($wasenc==1) {
                   1765: 			    my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
                   1766: 				=split(/:/,$userinput);
                   1767: 			    &Debug("cmd = ".$cmd." exedom= ".$exedom.
                   1768: 				   "user = ".$exeuser." udom=".$udom.
                   1769: 				   "what = ".$what);
                   1770: 			    my $namespace='roles';
                   1771: 			    chomp($what);
                   1772: 			    my $proname=propath($udom,$uname);
                   1773: 			    my $now=time;
                   1774: 			    {
                   1775: 				my $hfh;
                   1776: 				if (
                   1777: 				    $hfh=IO::File->new(">>$proname/$namespace.hist")
                   1778: 				    ) { 
                   1779: 				    print $hfh "P:$now:$exedom:$exeuser:$what\n";
                   1780: 				}
                   1781: 			    }
                   1782: 			    my @pairs=split(/\&/,$what);
                   1783: 			    my %hash;
                   1784: 			    if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
                   1785: 				foreach my $pair (@pairs) {
                   1786: 				    my ($key,$value)=split(/=/,$pair);
                   1787: 				    &ManagePermissions($key, $udom, $uname,
                   1788: 						       &GetAuthType( $udom, 
                   1789: 								     $uname));
                   1790: 				    $hash{$key}=$value;
                   1791: 				}
                   1792: 				if (untie(%hash)) {
                   1793: 				    print $client "ok\n";
                   1794: 				} else {
                   1795: 				    print $client "error: ".($!+0)
                   1796: 					." untie(GDBM) Failed ".
                   1797: 					"while attempting rolesput\n";
                   1798: 				}
                   1799: 			    } else {
                   1800: 				print $client "error: ".($!+0)
                   1801: 				    ." tie(GDBM) Failed ".
                   1802: 				    "while attempting rolesput\n";
                   1803: 			    }
                   1804: 			} else {
                   1805: 			    print $client "refused\n";
                   1806: 			}
                   1807: 		    } else {
                   1808: 			Reply($client, "refused\n", $userinput);
                   1809: 		  
                   1810: 		    }
1.117     www      1811: # -------------------------------------------------------------------- rolesdel
1.161     foxr     1812: 		} elsif ($userinput =~ /^rolesdel/) {
                   1813: 		    if(isClient) {
                   1814: 			&Debug("rolesdel");
                   1815: 			if ($wasenc==1) {
                   1816: 			    my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
                   1817: 				=split(/:/,$userinput);
                   1818: 			    &Debug("cmd = ".$cmd." exedom= ".$exedom.
                   1819: 				   "user = ".$exeuser." udom=".$udom.
                   1820: 				   "what = ".$what);
                   1821: 			    my $namespace='roles';
                   1822: 			    chomp($what);
                   1823: 			    my $proname=propath($udom,$uname);
                   1824: 			    my $now=time;
                   1825: 			    {
                   1826: 				my $hfh;
                   1827: 				if (
                   1828: 				    $hfh=IO::File->new(">>$proname/$namespace.hist")
                   1829: 				    ) { 
                   1830: 				    print $hfh "D:$now:$exedom:$exeuser:$what\n";
                   1831: 				}
                   1832: 			    }
                   1833: 			    my @rolekeys=split(/\&/,$what);
                   1834: 			    my %hash;
                   1835: 			    if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
                   1836: 				foreach my $key (@rolekeys) {
                   1837: 				    delete $hash{$key};
                   1838: 				}
                   1839: 				if (untie(%hash)) {
                   1840: 				    print $client "ok\n";
                   1841: 				} else {
                   1842: 				    print $client "error: ".($!+0)
                   1843: 					." untie(GDBM) Failed ".
                   1844: 					"while attempting rolesdel\n";
                   1845: 				}
                   1846: 			    } else {
                   1847: 				print $client "error: ".($!+0)
                   1848: 				    ." tie(GDBM) Failed ".
                   1849: 				    "while attempting rolesdel\n";
                   1850: 			    }
                   1851: 			} else {
                   1852: 			    print $client "refused\n";
                   1853: 			}
                   1854: 		    } else {
                   1855: 			Reply($client, "refused\n", $userinput);
                   1856: 		      
                   1857: 		    }
1.1       albertel 1858: # ------------------------------------------------------------------------- get
1.161     foxr     1859: 		} elsif ($userinput =~ /^get/) {
                   1860: 		    if(isClient) {
                   1861: 			my ($cmd,$udom,$uname,$namespace,$what)
                   1862: 			    =split(/:/,$userinput);
                   1863: 			$namespace=~s/\//\_/g;
                   1864: 			$namespace=~s/\W//g;
                   1865: 			chomp($what);
                   1866: 			my @queries=split(/\&/,$what);
                   1867: 			my $proname=propath($udom,$uname);
                   1868: 			my $qresult='';
                   1869: 			my %hash;
                   1870: 			if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
                   1871: 			    for (my $i=0;$i<=$#queries;$i++) {
                   1872: 				$qresult.="$hash{$queries[$i]}&";
                   1873: 			    }
                   1874: 			    if (untie(%hash)) {
                   1875: 				$qresult=~s/\&$//;
                   1876: 				print $client "$qresult\n";
                   1877: 			    } else {
                   1878: 				print $client "error: ".($!+0)
                   1879: 				    ." untie(GDBM) Failed ".
                   1880: 				    "while attempting get\n";
                   1881: 			    }
                   1882: 			} else {
                   1883: 			    if ($!+0 == 2) {
                   1884: 				print $client "error:No such file or ".
                   1885: 				    "GDBM reported bad block error\n";
                   1886: 			    } else {
                   1887: 				print $client "error: ".($!+0)
                   1888: 				    ." tie(GDBM) Failed ".
                   1889: 				    "while attempting get\n";
                   1890: 			    }
                   1891: 			}
                   1892: 		    } else {
                   1893: 			Reply($client, "refused\n", $userinput);
                   1894: 		       
                   1895: 		    }
1.1       albertel 1896: # ------------------------------------------------------------------------ eget
1.161     foxr     1897: 		} elsif ($userinput =~ /^eget/) {
                   1898: 		    if (isClient) {
                   1899: 			my ($cmd,$udom,$uname,$namespace,$what)
                   1900: 			    =split(/:/,$userinput);
                   1901: 			$namespace=~s/\//\_/g;
                   1902: 			$namespace=~s/\W//g;
                   1903: 			chomp($what);
                   1904: 			my @queries=split(/\&/,$what);
                   1905: 			my $proname=propath($udom,$uname);
                   1906: 			my $qresult='';
                   1907: 			my %hash;
                   1908: 			if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
                   1909: 			    for (my $i=0;$i<=$#queries;$i++) {
                   1910: 				$qresult.="$hash{$queries[$i]}&";
                   1911: 			    }
                   1912: 			    if (untie(%hash)) {
                   1913: 				$qresult=~s/\&$//;
                   1914: 				if ($cipher) {
                   1915: 				    my $cmdlength=length($qresult);
                   1916: 				    $qresult.="         ";
                   1917: 				    my $encqresult='';
                   1918: 				    for 
                   1919: 					(my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
                   1920: 					    $encqresult.=
                   1921: 						unpack("H16",
                   1922: 						       $cipher->encrypt(substr($qresult,$encidx,8)));
                   1923: 					}
                   1924: 				    print $client "enc:$cmdlength:$encqresult\n";
                   1925: 				} else {
                   1926: 				    print $client "error:no_key\n";
                   1927: 				}
                   1928: 			    } else {
                   1929: 				print $client "error: ".($!+0)
                   1930: 				    ." untie(GDBM) Failed ".
                   1931: 				    "while attempting eget\n";
                   1932: 			    }
                   1933: 			} else {
                   1934: 			    print $client "error: ".($!+0)
                   1935: 				." tie(GDBM) Failed ".
                   1936: 				"while attempting eget\n";
                   1937: 			}
                   1938: 		    } else {
                   1939: 			Reply($client, "refused\n", $userinput);
                   1940: 		    
                   1941: 		    }
1.1       albertel 1942: # ------------------------------------------------------------------------- del
1.161     foxr     1943: 		} elsif ($userinput =~ /^del/) {
                   1944: 		    if(isClient) {
                   1945: 			my ($cmd,$udom,$uname,$namespace,$what)
                   1946: 			    =split(/:/,$userinput);
                   1947: 			$namespace=~s/\//\_/g;
                   1948: 			$namespace=~s/\W//g;
                   1949: 			chomp($what);
                   1950: 			my $proname=propath($udom,$uname);
                   1951: 			my $now=time;
                   1952: 			unless ($namespace=~/^nohist\_/) {
                   1953: 			    my $hfh;
                   1954: 			    if (
                   1955: 				$hfh=IO::File->new(">>$proname/$namespace.hist")
                   1956: 				) { print $hfh "D:$now:$what\n"; }
                   1957: 			}
                   1958: 			my @keys=split(/\&/,$what);
                   1959: 			my %hash;
                   1960: 			if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
                   1961: 			    foreach my $key (@keys) {
1.165.2.2! albertel 1962: 				delete($hash{$key});
1.161     foxr     1963: 			    }
                   1964: 			    if (untie(%hash)) {
                   1965: 				print $client "ok\n";
                   1966: 			    } else {
                   1967: 				print $client "error: ".($!+0)
                   1968: 				    ." untie(GDBM) Failed ".
                   1969: 				    "while attempting del\n";
                   1970: 			    }
                   1971: 			} else {
                   1972: 			    print $client "error: ".($!+0)
                   1973: 				." tie(GDBM) Failed ".
                   1974: 				"while attempting del\n";
                   1975: 			}
                   1976: 		    } else {
                   1977: 			Reply($client, "refused\n", $userinput);
                   1978: 			
                   1979: 		    }
1.1       albertel 1980: # ------------------------------------------------------------------------ keys
1.161     foxr     1981: 		} elsif ($userinput =~ /^keys/) {
                   1982: 		    if(isClient) {
                   1983: 			my ($cmd,$udom,$uname,$namespace)
                   1984: 			    =split(/:/,$userinput);
                   1985: 			$namespace=~s/\//\_/g;
                   1986: 			$namespace=~s/\W//g;
                   1987: 			my $proname=propath($udom,$uname);
                   1988: 			my $qresult='';
                   1989: 			my %hash;
                   1990: 			if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
                   1991: 			    foreach my $key (keys %hash) {
                   1992: 				$qresult.="$key&";
                   1993: 			    }
                   1994: 			    if (untie(%hash)) {
                   1995: 				$qresult=~s/\&$//;
                   1996: 				print $client "$qresult\n";
                   1997: 			    } else {
                   1998: 				print $client "error: ".($!+0)
                   1999: 				    ." untie(GDBM) Failed ".
                   2000: 				    "while attempting keys\n";
                   2001: 			    }
                   2002: 			} else {
                   2003: 			    print $client "error: ".($!+0)
                   2004: 				." tie(GDBM) Failed ".
                   2005: 				"while attempting keys\n";
                   2006: 			}
                   2007: 		    } else {
                   2008: 			Reply($client, "refused\n", $userinput);
                   2009: 		   
                   2010: 		    }
1.105     matthew  2011: # ----------------------------------------------------------------- dumpcurrent
1.161     foxr     2012: 		} elsif ($userinput =~ /^currentdump/) {
                   2013: 		    if (isClient) {
                   2014: 			my ($cmd,$udom,$uname,$namespace)
                   2015: 			    =split(/:/,$userinput);
                   2016: 			$namespace=~s/\//\_/g;
                   2017: 			$namespace=~s/\W//g;
                   2018: 			my $qresult='';
                   2019: 			my $proname=propath($udom,$uname);
                   2020: 			my %hash;
                   2021: 			if (tie(%hash,'GDBM_File',
                   2022: 				"$proname/$namespace.db",
                   2023: 				&GDBM_READER(),0640)) {
                   2024: 			    # Structure of %data:
                   2025: 			    # $data{$symb}->{$parameter}=$value;
                   2026: 			    # $data{$symb}->{'v.'.$parameter}=$version;
                   2027: 			    # since $parameter will be unescaped, we do not
                   2028: 			    # have to worry about silly parameter names...
                   2029: 			    my %data = ();
                   2030: 			    while (my ($key,$value) = each(%hash)) {
                   2031: 				my ($v,$symb,$param) = split(/:/,$key);
                   2032: 				next if ($v eq 'version' || $symb eq 'keys');
                   2033: 				next if (exists($data{$symb}) && 
                   2034: 					 exists($data{$symb}->{$param}) &&
                   2035: 					 $data{$symb}->{'v.'.$param} > $v);
                   2036: 				$data{$symb}->{$param}=$value;
                   2037: 				$data{$symb}->{'v.'.$param}=$v;
                   2038: 			    }
                   2039: 			    if (untie(%hash)) {
                   2040: 				while (my ($symb,$param_hash) = each(%data)) {
                   2041: 				    while(my ($param,$value) = each (%$param_hash)){
                   2042: 					next if ($param =~ /^v\./);
                   2043: 					$qresult.=$symb.':'.$param.'='.$value.'&';
                   2044: 				    }
                   2045: 				}
                   2046: 				chop($qresult);
                   2047: 				print $client "$qresult\n";
                   2048: 			    } else {
                   2049: 				print $client "error: ".($!+0)
                   2050: 				    ." untie(GDBM) Failed ".
                   2051: 				    "while attempting currentdump\n";
                   2052: 			    }
                   2053: 			} else {
                   2054: 			    print $client "error: ".($!+0)
                   2055: 				." tie(GDBM) Failed ".
                   2056: 				"while attempting currentdump\n";
                   2057: 			}
                   2058: 		    } else {
                   2059: 			Reply($client, "refused\n", $userinput);
                   2060: 		    }
1.1       albertel 2061: # ------------------------------------------------------------------------ dump
1.161     foxr     2062: 		} elsif ($userinput =~ /^dump/) {
                   2063: 		    if(isClient) {
                   2064: 			my ($cmd,$udom,$uname,$namespace,$regexp)
                   2065: 			    =split(/:/,$userinput);
                   2066: 			$namespace=~s/\//\_/g;
                   2067: 			$namespace=~s/\W//g;
                   2068: 			if (defined($regexp)) {
                   2069: 			    $regexp=&unescape($regexp);
                   2070: 			} else {
                   2071: 			    $regexp='.';
                   2072: 			}
                   2073: 			my $qresult='';
                   2074: 			my $proname=propath($udom,$uname);
                   2075: 			my %hash;
                   2076: 			if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
                   2077: 			       study($regexp);
                   2078: 			       while (my ($key,$value) = each(%hash)) {
                   2079: 				   if ($regexp eq '.') {
                   2080: 				       $qresult.=$key.'='.$value.'&';
                   2081: 				   } else {
                   2082: 				       my $unescapeKey = &unescape($key);
                   2083: 				       if (eval('$unescapeKey=~/$regexp/')) {
                   2084: 					   $qresult.="$key=$value&";
                   2085: 				       }
                   2086: 				   }
                   2087: 			       }
                   2088: 			       if (untie(%hash)) {
                   2089: 				   chop($qresult);
                   2090: 				   print $client "$qresult\n";
                   2091: 			       } else {
                   2092: 				   print $client "error: ".($!+0)
                   2093: 				       ." untie(GDBM) Failed ".
1.111     matthew  2094:                                        "while attempting dump\n";
1.161     foxr     2095: 			       }
                   2096: 			   } else {
                   2097: 			       print $client "error: ".($!+0)
                   2098: 				   ." tie(GDBM) Failed ".
                   2099: 				   "while attempting dump\n";
                   2100: 			   }
                   2101: 		    } else {
                   2102: 			Reply($client, "refused\n", $userinput);
                   2103: 		 
                   2104: 		    }
1.7       www      2105: # ----------------------------------------------------------------------- store
1.161     foxr     2106: 		} elsif ($userinput =~ /^store/) {
                   2107: 		    if(isClient) {
                   2108: 			my ($cmd,$udom,$uname,$namespace,$rid,$what)
                   2109: 			    =split(/:/,$userinput);
                   2110: 			$namespace=~s/\//\_/g;
                   2111: 			$namespace=~s/\W//g;
                   2112: 			if ($namespace ne 'roles') {
                   2113: 			    chomp($what);
                   2114: 			    my $proname=propath($udom,$uname);
                   2115: 			    my $now=time;
                   2116: 			    unless ($namespace=~/^nohist\_/) {
                   2117: 				my $hfh;
                   2118: 				if (
                   2119: 				    $hfh=IO::File->new(">>$proname/$namespace.hist")
                   2120: 				    ) { print $hfh "P:$now:$rid:$what\n"; }
                   2121: 			    }
                   2122: 			    my @pairs=split(/\&/,$what);
                   2123: 			    my %hash;
                   2124: 			    if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
                   2125: 				my @previouskeys=split(/&/,$hash{"keys:$rid"});
                   2126: 				my $key;
                   2127: 				$hash{"version:$rid"}++;
                   2128: 				my $version=$hash{"version:$rid"};
                   2129: 				my $allkeys=''; 
                   2130: 				foreach my $pair (@pairs) {
                   2131: 				    my ($key,$value)=split(/=/,$pair);
                   2132: 				    $allkeys.=$key.':';
                   2133: 				    $hash{"$version:$rid:$key"}=$value;
                   2134: 				}
                   2135: 				$hash{"$version:$rid:timestamp"}=$now;
                   2136: 				$allkeys.='timestamp';
                   2137: 				$hash{"$version:keys:$rid"}=$allkeys;
                   2138: 				if (untie(%hash)) {
                   2139: 				    print $client "ok\n";
                   2140: 				} else {
                   2141: 				    print $client "error: ".($!+0)
                   2142: 					." untie(GDBM) Failed ".
                   2143: 					"while attempting store\n";
                   2144: 				}
                   2145: 			    } else {
                   2146: 				print $client "error: ".($!+0)
                   2147: 				    ." tie(GDBM) Failed ".
                   2148: 				    "while attempting store\n";
                   2149: 			    }
                   2150: 			} else {
                   2151: 			    print $client "refused\n";
                   2152: 			}
                   2153: 		    } else {
                   2154: 			Reply($client, "refused\n", $userinput);
                   2155: 		     
                   2156: 		    }
1.7       www      2157: # --------------------------------------------------------------------- restore
1.161     foxr     2158: 		} elsif ($userinput =~ /^restore/) {
                   2159: 		    if(isClient) {
                   2160: 			my ($cmd,$udom,$uname,$namespace,$rid)
                   2161: 			    =split(/:/,$userinput);
                   2162: 			$namespace=~s/\//\_/g;
                   2163: 			$namespace=~s/\W//g;
                   2164: 			chomp($rid);
                   2165: 			my $proname=propath($udom,$uname);
                   2166: 			my $qresult='';
                   2167: 			my %hash;
                   2168: 			if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
                   2169: 			    my $version=$hash{"version:$rid"};
                   2170: 			    $qresult.="version=$version&";
                   2171: 			    my $scope;
                   2172: 			    for ($scope=1;$scope<=$version;$scope++) {
                   2173: 				my $vkeys=$hash{"$scope:keys:$rid"};
                   2174: 				my @keys=split(/:/,$vkeys);
                   2175: 				my $key;
                   2176: 				$qresult.="$scope:keys=$vkeys&";
                   2177: 				foreach $key (@keys) {
                   2178: 				    $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&";
                   2179: 				}                                  
                   2180: 			    }
                   2181: 			    if (untie(%hash)) {
                   2182: 				$qresult=~s/\&$//;
                   2183: 				print $client "$qresult\n";
                   2184: 			    } else {
                   2185: 				print $client "error: ".($!+0)
                   2186: 				    ." untie(GDBM) Failed ".
                   2187: 				    "while attempting restore\n";
                   2188: 			    }
                   2189: 			} else {
                   2190: 			    print $client "error: ".($!+0)
                   2191: 				." tie(GDBM) Failed ".
                   2192: 				"while attempting restore\n";
                   2193: 			}
                   2194: 		    } else  {
                   2195: 			Reply($client, "refused\n", $userinput);
                   2196: 		       
                   2197: 		    }
1.86      www      2198: # -------------------------------------------------------------------- chatsend
1.161     foxr     2199: 		} elsif ($userinput =~ /^chatsend/) {
                   2200: 		    if(isClient) {
                   2201: 			my ($cmd,$cdom,$cnum,$newpost)=split(/\:/,$userinput);
                   2202: 			&chatadd($cdom,$cnum,$newpost);
                   2203: 			print $client "ok\n";
                   2204: 		    } else {
                   2205: 			Reply($client, "refused\n", $userinput);
                   2206: 		      
                   2207: 		    }
1.86      www      2208: # -------------------------------------------------------------------- chatretr
1.161     foxr     2209: 		} elsif ($userinput =~ /^chatretr/) {
                   2210: 		    if(isClient) {
                   2211: 			my 
                   2212: 			    ($cmd,$cdom,$cnum,$udom,$uname)=split(/\:/,$userinput);
                   2213: 			my $reply='';
                   2214: 			foreach (&getchat($cdom,$cnum,$udom,$uname)) {
                   2215: 			    $reply.=&escape($_).':';
                   2216: 			}
                   2217: 			$reply=~s/\:$//;
                   2218: 			print $client $reply."\n";
                   2219: 		    } else {
                   2220: 			Reply($client, "refused\n", $userinput);
                   2221: 		       
                   2222: 		    }
1.12      harris41 2223: # ------------------------------------------------------------------- querysend
1.161     foxr     2224: 		} elsif ($userinput =~ /^querysend/) {
                   2225: 		    if(isClient) {
                   2226: 			my ($cmd,$query,
                   2227: 			    $arg1,$arg2,$arg3)=split(/\:/,$userinput);
                   2228: 			$query=~s/\n*$//g;
                   2229: 			print $client "".
                   2230: 			    sqlreply("$clientname\&$query".
                   2231: 				     "\&$arg1"."\&$arg2"."\&$arg3")."\n";
                   2232: 		    } else {
                   2233: 			Reply($client, "refused\n", $userinput);
                   2234: 		      
                   2235: 		    }
1.12      harris41 2236: # ------------------------------------------------------------------ queryreply
1.161     foxr     2237: 		} elsif ($userinput =~ /^queryreply/) {
                   2238: 		    if(isClient) {
                   2239: 			my ($cmd,$id,$reply)=split(/:/,$userinput); 
                   2240: 			my $store;
                   2241: 			my $execdir=$perlvar{'lonDaemons'};
                   2242: 			if ($store=IO::File->new(">$execdir/tmp/$id")) {
                   2243: 			    $reply=~s/\&/\n/g;
                   2244: 			    print $store $reply;
                   2245: 			    close $store;
                   2246: 			    my $store2=IO::File->new(">$execdir/tmp/$id.end");
                   2247: 			    print $store2 "done\n";
                   2248: 			    close $store2;
                   2249: 			    print $client "ok\n";
                   2250: 			}
                   2251: 			else {
                   2252: 			    print $client "error: ".($!+0)
                   2253: 				." IO::File->new Failed ".
                   2254: 				"while attempting queryreply\n";
                   2255: 			}
                   2256: 		    } else {
                   2257: 			Reply($client, "refused\n", $userinput);
                   2258: 		     
                   2259: 		    }
1.118     www      2260: # ----------------------------------------------------------------- courseidput
1.161     foxr     2261: 		} elsif ($userinput =~ /^courseidput/) {
                   2262: 		    if(isClient) {
                   2263: 			my ($cmd,$udom,$what)=split(/:/,$userinput);
                   2264: 			chomp($what);
                   2265: 			$udom=~s/\W//g;
                   2266: 			my $proname=
                   2267: 			    "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
                   2268: 			my $now=time;
                   2269: 			my @pairs=split(/\&/,$what);
                   2270: 			my %hash;
                   2271: 			if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
                   2272: 			    foreach my $pair (@pairs) {
                   2273: 				my ($key,$value)=split(/=/,$pair);
                   2274: 				$hash{$key}=$value.':'.$now;
                   2275: 			    }
                   2276: 			    if (untie(%hash)) {
                   2277: 				print $client "ok\n";
                   2278: 			    } else {
                   2279: 				print $client "error: ".($!+0)
                   2280: 				    ." untie(GDBM) Failed ".
                   2281: 				    "while attempting courseidput\n";
                   2282: 			    }
                   2283: 			} else {
                   2284: 			    print $client "error: ".($!+0)
                   2285: 				." tie(GDBM) Failed ".
                   2286: 				"while attempting courseidput\n";
                   2287: 			}
                   2288: 		    } else {
                   2289: 			Reply($client, "refused\n", $userinput);
                   2290: 		       
                   2291: 		    }
1.118     www      2292: # ---------------------------------------------------------------- courseiddump
1.161     foxr     2293: 		} elsif ($userinput =~ /^courseiddump/) {
                   2294: 		    if(isClient) {
                   2295: 			my ($cmd,$udom,$since,$description)
                   2296: 			    =split(/:/,$userinput);
                   2297: 			if (defined($description)) {
                   2298: 			    $description=&unescape($description);
                   2299: 			} else {
                   2300: 			    $description='.';
                   2301: 			}
                   2302: 			unless (defined($since)) { $since=0; }
                   2303: 			my $qresult='';
                   2304: 			my $proname=
                   2305: 			    "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
                   2306: 			my %hash;
                   2307: 			if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
                   2308: 			    while (my ($key,$value) = each(%hash)) {
                   2309: 				my ($descr,$lasttime)=split(/\:/,$value);
                   2310: 				if ($lasttime<$since) { next; }
                   2311: 				if ($description eq '.') {
                   2312: 				    $qresult.=$key.'='.$descr.'&';
                   2313: 				} else {
                   2314: 				    my $unescapeVal = &unescape($descr);
                   2315: 				    if (eval('$unescapeVal=~/$description/i')) {
                   2316: 					$qresult.="$key=$descr&";
                   2317: 				    }
                   2318: 				}
                   2319: 			    }
                   2320: 			    if (untie(%hash)) {
                   2321: 				chop($qresult);
                   2322: 				print $client "$qresult\n";
                   2323: 			    } else {
                   2324: 				print $client "error: ".($!+0)
                   2325: 				    ." untie(GDBM) Failed ".
                   2326: 				    "while attempting courseiddump\n";
                   2327: 			    }
                   2328: 			} else {
                   2329: 			    print $client "error: ".($!+0)
                   2330: 				." tie(GDBM) Failed ".
                   2331: 				"while attempting courseiddump\n";
                   2332: 			}
                   2333: 		    } else {
                   2334: 			Reply($client, "refused\n", $userinput);
                   2335: 		       
                   2336: 		    }
1.1       albertel 2337: # ----------------------------------------------------------------------- idput
1.161     foxr     2338: 		} elsif ($userinput =~ /^idput/) {
                   2339: 		    if(isClient) {
                   2340: 			my ($cmd,$udom,$what)=split(/:/,$userinput);
                   2341: 			chomp($what);
                   2342: 			$udom=~s/\W//g;
                   2343: 			my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
                   2344: 			my $now=time;
                   2345: 			{
                   2346: 			    my $hfh;
                   2347: 			    if (
                   2348: 				$hfh=IO::File->new(">>$proname.hist")
                   2349: 				) { print $hfh "P:$now:$what\n"; }
                   2350: 			}
                   2351: 			my @pairs=split(/\&/,$what);
                   2352: 			my %hash;
                   2353: 			if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
                   2354: 			    foreach my $pair (@pairs) {
                   2355: 				my ($key,$value)=split(/=/,$pair);
                   2356: 				$hash{$key}=$value;
                   2357: 			    }
                   2358: 			    if (untie(%hash)) {
                   2359: 				print $client "ok\n";
                   2360: 			    } else {
                   2361: 				print $client "error: ".($!+0)
                   2362: 				    ." untie(GDBM) Failed ".
                   2363: 				    "while attempting idput\n";
                   2364: 			    }
                   2365: 			} else {
                   2366: 			    print $client "error: ".($!+0)
                   2367: 				." tie(GDBM) Failed ".
                   2368: 				"while attempting idput\n";
                   2369: 			}
                   2370: 		    } else {
                   2371: 			Reply($client, "refused\n", $userinput);
                   2372: 		       
                   2373: 		    }
1.1       albertel 2374: # ----------------------------------------------------------------------- idget
1.161     foxr     2375: 		} elsif ($userinput =~ /^idget/) {
                   2376: 		    if(isClient) {
                   2377: 			my ($cmd,$udom,$what)=split(/:/,$userinput);
                   2378: 			chomp($what);
                   2379: 			$udom=~s/\W//g;
                   2380: 			my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
                   2381: 			my @queries=split(/\&/,$what);
                   2382: 			my $qresult='';
                   2383: 			my %hash;
                   2384: 			if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
                   2385: 			    for (my $i=0;$i<=$#queries;$i++) {
                   2386: 				$qresult.="$hash{$queries[$i]}&";
                   2387: 			    }
                   2388: 			    if (untie(%hash)) {
                   2389: 				$qresult=~s/\&$//;
                   2390: 				print $client "$qresult\n";
                   2391: 			    } else {
                   2392: 				print $client "error: ".($!+0)
                   2393: 				    ." untie(GDBM) Failed ".
                   2394: 				    "while attempting idget\n";
                   2395: 			    }
                   2396: 			} else {
                   2397: 			    print $client "error: ".($!+0)
                   2398: 				." tie(GDBM) Failed ".
                   2399: 				"while attempting idget\n";
                   2400: 			}
                   2401: 		    } else {
                   2402: 			Reply($client, "refused\n", $userinput);
                   2403: 		       
                   2404: 		    }
1.13      www      2405: # ---------------------------------------------------------------------- tmpput
1.161     foxr     2406: 		} elsif ($userinput =~ /^tmpput/) {
                   2407: 		    if(isClient) {
                   2408: 			my ($cmd,$what)=split(/:/,$userinput);
                   2409: 			my $store;
                   2410: 			$tmpsnum++;
                   2411: 			my $id=$$.'_'.$clientip.'_'.$tmpsnum;
                   2412: 			$id=~s/\W/\_/g;
                   2413: 			$what=~s/\n//g;
                   2414: 			my $execdir=$perlvar{'lonDaemons'};
                   2415: 			if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) {
                   2416: 			    print $store $what;
                   2417: 			    close $store;
                   2418: 			    print $client "$id\n";
                   2419: 			}
                   2420: 			else {
                   2421: 			    print $client "error: ".($!+0)
                   2422: 				."IO::File->new Failed ".
                   2423: 				"while attempting tmpput\n";
                   2424: 			}
                   2425: 		    } else {
                   2426: 			Reply($client, "refused\n", $userinput);
                   2427: 		    
                   2428: 		    }
                   2429: 		    
1.13      www      2430: # ---------------------------------------------------------------------- tmpget
1.161     foxr     2431: 		} elsif ($userinput =~ /^tmpget/) {
                   2432: 		    if(isClient) {
                   2433: 			my ($cmd,$id)=split(/:/,$userinput);
                   2434: 			chomp($id);
                   2435: 			$id=~s/\W/\_/g;
                   2436: 			my $store;
                   2437: 			my $execdir=$perlvar{'lonDaemons'};
                   2438: 			if ($store=IO::File->new("$execdir/tmp/$id.tmp")) {
                   2439: 			    my $reply=<$store>;
                   2440: 			    print $client "$reply\n";
                   2441: 			    close $store;
                   2442: 			}
                   2443: 			else {
                   2444: 			    print $client "error: ".($!+0)
                   2445: 				."IO::File->new Failed ".
                   2446: 				"while attempting tmpget\n";
                   2447: 			}
                   2448: 		    } else {
                   2449: 			Reply($client, "refused\n", $userinput);
                   2450: 		      
                   2451: 		    }
1.110     www      2452: # ---------------------------------------------------------------------- tmpdel
1.161     foxr     2453: 		} elsif ($userinput =~ /^tmpdel/) {
                   2454: 		    if(isClient) {
                   2455: 			my ($cmd,$id)=split(/:/,$userinput);
                   2456: 			chomp($id);
                   2457: 			$id=~s/\W/\_/g;
                   2458: 			my $execdir=$perlvar{'lonDaemons'};
                   2459: 			if (unlink("$execdir/tmp/$id.tmp")) {
                   2460: 			    print $client "ok\n";
                   2461: 			} else {
                   2462: 			    print $client "error: ".($!+0)
                   2463: 				."Unlink tmp Failed ".
                   2464: 				"while attempting tmpdel\n";
                   2465: 			}
                   2466: 		    } else {
                   2467: 			Reply($client, "refused\n", $userinput);
                   2468: 		     
                   2469: 		    }
1.5       www      2470: # -------------------------------------------------------------------------- ls
1.161     foxr     2471: 		} elsif ($userinput =~ /^ls/) {
                   2472: 		    if(isClient) {
                   2473: 			my ($cmd,$ulsdir)=split(/:/,$userinput);
                   2474: 			my $ulsout='';
                   2475: 			my $ulsfn;
                   2476: 			if (-e $ulsdir) {
                   2477: 			    if(-d $ulsdir) {
                   2478: 				if (opendir(LSDIR,$ulsdir)) {
                   2479: 				    while ($ulsfn=readdir(LSDIR)) {
                   2480: 					my @ulsstats=stat($ulsdir.'/'.$ulsfn);
                   2481: 					$ulsout.=$ulsfn.'&'.
                   2482: 					    join('&',@ulsstats).':';
                   2483: 				    }
                   2484: 				    closedir(LSDIR);
                   2485: 				}
                   2486: 			    } else {
                   2487: 				my @ulsstats=stat($ulsdir);
                   2488: 				$ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
                   2489: 			    }
                   2490: 			} else {
                   2491: 			    $ulsout='no_such_dir';
                   2492: 			}
                   2493: 			if ($ulsout eq '') { $ulsout='empty'; }
                   2494: 			print $client "$ulsout\n";
                   2495: 		    } else {
                   2496: 			Reply($client, "refused\n", $userinput);
                   2497: 		     
                   2498: 		    }
1.136     www      2499: # ----------------------------------------------------------------- setannounce
1.161     foxr     2500: 		} elsif ($userinput =~ /^setannounce/) {
                   2501: 		    if (isClient) {
                   2502: 			my ($cmd,$announcement)=split(/:/,$userinput);
                   2503: 			chomp($announcement);
                   2504: 			$announcement=&unescape($announcement);
                   2505: 			if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
                   2506: 						    '/announcement.txt')) {
                   2507: 			    print $store $announcement;
                   2508: 			    close $store;
                   2509: 			    print $client "ok\n";
                   2510: 			} else {
                   2511: 			    print $client "error: ".($!+0)."\n";
                   2512: 			}
                   2513: 		    } else {
                   2514: 			Reply($client, "refused\n", $userinput);
                   2515: 		       
                   2516: 		    }
1.51      www      2517: # ------------------------------------------------------------------ Hanging up
1.161     foxr     2518: 		} elsif (($userinput =~ /^exit/) ||
                   2519: 			 ($userinput =~ /^init/)) { # no restrictions.
                   2520: 		    &logthis(
                   2521: 			     "Client $clientip ($clientname) hanging up: $userinput");
                   2522: 		    print $client "bye\n";
1.164     foxr     2523: 		    $client->shutdown(2);        # shutdown the socket forcibly.
1.161     foxr     2524: 		    $client->close();
                   2525: 		    last;
                   2526: 
                   2527: # ---------------------------------- set current host/domain
                   2528: 		} elsif ($userinput =~ /^sethost:/) {
                   2529: 		    if (isClient) {
                   2530: 			print $client &sethost($userinput)."\n";
                   2531: 		    } else {
                   2532: 			print $client "refused\n";
                   2533: 		    }
                   2534: #---------------------------------- request file (?) version.
                   2535: 		} elsif ($userinput =~/^version:/) {
                   2536: 		    if (isClient) {
                   2537: 			print $client &version($userinput)."\n";
                   2538: 		    } else {
                   2539: 			print $client "refused\n";
                   2540: 		    }
1.1       albertel 2541: # ------------------------------------------------------------- unknown command
1.161     foxr     2542: 
                   2543: 		} else {
                   2544: 		    # unknown command
                   2545: 		    print $client "unknown_cmd\n";
                   2546: 		}
1.58      www      2547: # -------------------------------------------------------------------- complete
1.161     foxr     2548: 		alarm(0);
                   2549: 		&status('Listening to '.$clientname);
                   2550: 	    }
1.59      www      2551: # --------------------------------------------- client unknown or fishy, refuse
1.161     foxr     2552: 	} else {
                   2553: 	    print $client "refused\n";
                   2554: 	    $client->close();
                   2555: 	    &logthis("<font color=blue>WARNING: "
                   2556: 		     ."Rejected client $clientip, closing connection</font>");
                   2557: 	}
                   2558:     }             
                   2559:     
1.1       albertel 2560: # =============================================================================
1.161     foxr     2561:     
                   2562:     &logthis("<font color=red>CRITICAL: "
                   2563: 	     ."Disconnect from $clientip ($clientname)</font>");    
                   2564:     
                   2565:     
                   2566:     # this exit is VERY important, otherwise the child will become
                   2567:     # a producer of more and more children, forking yourself into
                   2568:     # process death.
                   2569:     exit;
1.106     foxr     2570:     
1.78      foxr     2571: }
                   2572: 
                   2573: 
                   2574: #
                   2575: #   Checks to see if the input roleput request was to set
                   2576: # an author role.  If so, invokes the lchtmldir script to set
                   2577: # up a correct public_html 
                   2578: # Parameters:
                   2579: #    request   - The request sent to the rolesput subchunk.
                   2580: #                We're looking for  /domain/_au
                   2581: #    domain    - The domain in which the user is having roles doctored.
                   2582: #    user      - Name of the user for which the role is being put.
                   2583: #    authtype  - The authentication type associated with the user.
                   2584: #
                   2585: sub ManagePermissions
                   2586: {
                   2587:     my $request = shift;
                   2588:     my $domain  = shift;
                   2589:     my $user    = shift;
                   2590:     my $authtype= shift;
                   2591: 
                   2592:     # See if the request is of the form /$domain/_au
1.134     albertel 2593:     &logthis("ruequest is $request");
1.78      foxr     2594:     if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...
                   2595: 	my $execdir = $perlvar{'lonDaemons'};
                   2596: 	my $userhome= "/home/$user" ;
1.134     albertel 2597: 	&logthis("system $execdir/lchtmldir $userhome $user $authtype");
1.78      foxr     2598: 	system("$execdir/lchtmldir $userhome $user $authtype");
                   2599:     }
                   2600: }
                   2601: #
                   2602: #   GetAuthType - Determines the authorization type of a user in a domain.
                   2603: 
                   2604: #     Returns the authorization type or nouser if there is no such user.
                   2605: #
                   2606: sub GetAuthType 
                   2607: {
                   2608:     my $domain = shift;
                   2609:     my $user   = shift;
                   2610: 
1.79      foxr     2611:     Debug("GetAuthType( $domain, $user ) \n");
1.78      foxr     2612:     my $proname    = &propath($domain, $user); 
                   2613:     my $passwdfile = "$proname/passwd";
                   2614:     if( -e $passwdfile ) {
                   2615: 	my $pf = IO::File->new($passwdfile);
                   2616: 	my $realpassword = <$pf>;
                   2617: 	chomp($realpassword);
1.79      foxr     2618: 	Debug("Password info = $realpassword\n");
1.78      foxr     2619: 	my ($authtype, $contentpwd) = split(/:/, $realpassword);
1.79      foxr     2620: 	Debug("Authtype = $authtype, content = $contentpwd\n");
1.78      foxr     2621: 	my $availinfo = '';
1.91      albertel 2622: 	if($authtype eq 'krb4' or $authtype eq 'krb5') {
1.78      foxr     2623: 	    $availinfo = $contentpwd;
                   2624: 	}
1.79      foxr     2625: 
1.78      foxr     2626: 	return "$authtype:$availinfo";
                   2627:     }
                   2628:     else {
1.79      foxr     2629: 	Debug("Returning nouser");
1.78      foxr     2630: 	return "nouser";
                   2631:     }
1.1       albertel 2632: }
                   2633: 
1.84      albertel 2634: sub addline {
                   2635:     my ($fname,$hostid,$ip,$newline)=@_;
                   2636:     my $contents;
                   2637:     my $found=0;
                   2638:     my $expr='^'.$hostid.':'.$ip.':';
                   2639:     $expr =~ s/\./\\\./g;
1.134     albertel 2640:     my $sh;
1.84      albertel 2641:     if ($sh=IO::File->new("$fname.subscription")) {
                   2642: 	while (my $subline=<$sh>) {
                   2643: 	    if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;}
                   2644: 	}
                   2645: 	$sh->close();
                   2646:     }
                   2647:     $sh=IO::File->new(">$fname.subscription");
                   2648:     if ($contents) { print $sh $contents; }
                   2649:     if ($newline) { print $sh $newline; }
                   2650:     $sh->close();
                   2651:     return $found;
1.86      www      2652: }
                   2653: 
                   2654: sub getchat {
1.122     www      2655:     my ($cdom,$cname,$udom,$uname)=@_;
1.87      www      2656:     my %hash;
                   2657:     my $proname=&propath($cdom,$cname);
                   2658:     my @entries=();
1.88      albertel 2659:     if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
                   2660: 	    &GDBM_READER(),0640)) {
                   2661: 	@entries=map { $_.':'.$hash{$_} } sort keys %hash;
                   2662: 	untie %hash;
1.123     www      2663:     }
1.124     www      2664:     my @participants=();
1.134     albertel 2665:     my $cutoff=time-60;
1.123     www      2666:     if (tie(%hash,'GDBM_File',"$proname/nohist_inchatroom.db",
1.124     www      2667: 	    &GDBM_WRCREAT(),0640)) {
                   2668:         $hash{$uname.':'.$udom}=time;
1.123     www      2669:         foreach (sort keys %hash) {
                   2670: 	    if ($hash{$_}>$cutoff) {
1.124     www      2671: 		$participants[$#participants+1]='active_participant:'.$_;
1.123     www      2672:             }
                   2673:         }
                   2674:         untie %hash;
1.86      www      2675:     }
1.124     www      2676:     return (@participants,@entries);
1.86      www      2677: }
                   2678: 
                   2679: sub chatadd {
1.88      albertel 2680:     my ($cdom,$cname,$newchat)=@_;
                   2681:     my %hash;
                   2682:     my $proname=&propath($cdom,$cname);
                   2683:     my @entries=();
1.142     www      2684:     my $time=time;
1.88      albertel 2685:     if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db",
                   2686: 	    &GDBM_WRCREAT(),0640)) {
                   2687: 	@entries=map { $_.':'.$hash{$_} } sort keys %hash;
                   2688: 	my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
                   2689: 	my ($thentime,$idnum)=split(/\_/,$lastid);
                   2690: 	my $newid=$time.'_000000';
                   2691: 	if ($thentime==$time) {
                   2692: 	    $idnum=~s/^0+//;
                   2693: 	    $idnum++;
                   2694: 	    $idnum=substr('000000'.$idnum,-6,6);
                   2695: 	    $newid=$time.'_'.$idnum;
                   2696: 	}
                   2697: 	$hash{$newid}=$newchat;
                   2698: 	my $expired=$time-3600;
                   2699: 	foreach (keys %hash) {
                   2700: 	    my ($thistime)=($_=~/(\d+)\_/);
                   2701: 	    if ($thistime<$expired) {
1.89      www      2702: 		delete $hash{$_};
1.88      albertel 2703: 	    }
                   2704: 	}
                   2705: 	untie %hash;
1.142     www      2706:     }
                   2707:     {
                   2708: 	my $hfh;
                   2709: 	if ($hfh=IO::File->new(">>$proname/chatroom.log")) { 
                   2710: 	    print $hfh "$time:".&unescape($newchat)."\n";
                   2711: 	}
1.86      www      2712:     }
1.84      albertel 2713: }
                   2714: 
                   2715: sub unsub {
                   2716:     my ($fname,$clientip)=@_;
                   2717:     my $result;
1.161     foxr     2718:     if (unlink("$fname.$clientname")) {
1.84      albertel 2719: 	$result="ok\n";
                   2720:     } else {
                   2721: 	$result="not_subscribed\n";
                   2722:     }
                   2723:     if (-e "$fname.subscription") {
1.161     foxr     2724: 	my $found=&addline($fname,$clientname,$clientip,'');
1.84      albertel 2725: 	if ($found) { $result="ok\n"; }
                   2726:     } else {
                   2727: 	if ($result != "ok\n") { $result="not_subscribed\n"; }
                   2728:     }
                   2729:     return $result;
                   2730: }
                   2731: 
1.101     www      2732: sub currentversion {
                   2733:     my $fname=shift;
                   2734:     my $version=-1;
                   2735:     my $ulsdir='';
                   2736:     if ($fname=~/^(.+)\/[^\/]+$/) {
                   2737:        $ulsdir=$1;
                   2738:     }
1.114     albertel 2739:     my ($fnamere1,$fnamere2);
                   2740:     # remove version if already specified
1.101     www      2741:     $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/;
1.114     albertel 2742:     # get the bits that go before and after the version number
                   2743:     if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) {
                   2744: 	$fnamere1=$1;
                   2745: 	$fnamere2='.'.$2;
                   2746:     }
1.101     www      2747:     if (-e $fname) { $version=1; }
                   2748:     if (-e $ulsdir) {
1.134     albertel 2749: 	if(-d $ulsdir) {
                   2750: 	    if (opendir(LSDIR,$ulsdir)) {
                   2751: 		my $ulsfn;
                   2752: 		while ($ulsfn=readdir(LSDIR)) {
1.101     www      2753: # see if this is a regular file (ignore links produced earlier)
1.134     albertel 2754: 		    my $thisfile=$ulsdir.'/'.$ulsfn;
                   2755: 		    unless (-l $thisfile) {
1.160     www      2756: 			if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) {
1.134     albertel 2757: 			    if ($1>$version) { $version=$1; }
                   2758: 			}
                   2759: 		    }
                   2760: 		}
                   2761: 		closedir(LSDIR);
                   2762: 		$version++;
                   2763: 	    }
                   2764: 	}
                   2765:     }
                   2766:     return $version;
1.101     www      2767: }
                   2768: 
                   2769: sub thisversion {
                   2770:     my $fname=shift;
                   2771:     my $version=-1;
                   2772:     if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) {
                   2773: 	$version=$1;
                   2774:     }
                   2775:     return $version;
                   2776: }
                   2777: 
1.84      albertel 2778: sub subscribe {
                   2779:     my ($userinput,$clientip)=@_;
                   2780:     my $result;
                   2781:     my ($cmd,$fname)=split(/:/,$userinput);
                   2782:     my $ownership=&ishome($fname);
                   2783:     if ($ownership eq 'owner') {
1.101     www      2784: # explitly asking for the current version?
                   2785:         unless (-e $fname) {
                   2786:             my $currentversion=&currentversion($fname);
                   2787: 	    if (&thisversion($fname)==$currentversion) {
                   2788:                 if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) {
                   2789: 		    my $root=$1;
                   2790:                     my $extension=$2;
                   2791:                     symlink($root.'.'.$extension,
                   2792:                             $root.'.'.$currentversion.'.'.$extension);
1.102     www      2793:                     unless ($extension=~/\.meta$/) {
                   2794:                        symlink($root.'.'.$extension.'.meta',
                   2795:                             $root.'.'.$currentversion.'.'.$extension.'.meta');
                   2796: 		    }
1.101     www      2797:                 }
                   2798:             }
                   2799:         }
1.84      albertel 2800: 	if (-e $fname) {
                   2801: 	    if (-d $fname) {
                   2802: 		$result="directory\n";
                   2803: 	    } else {
1.161     foxr     2804: 		if (-e "$fname.$clientname") {&unsub($fname,$clientip);}
1.134     albertel 2805: 		my $now=time;
1.161     foxr     2806: 		my $found=&addline($fname,$clientname,$clientip,
                   2807: 				   "$clientname:$clientip:$now\n");
1.84      albertel 2808: 		if ($found) { $result="$fname\n"; }
                   2809: 		# if they were subscribed to only meta data, delete that
                   2810:                 # subscription, when you subscribe to a file you also get
                   2811:                 # the metadata
                   2812: 		unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); }
                   2813: 		$fname=~s/\/home\/httpd\/html\/res/raw/;
                   2814: 		$fname="http://$thisserver/".$fname;
                   2815: 		$result="$fname\n";
                   2816: 	    }
                   2817: 	} else {
                   2818: 	    $result="not_found\n";
                   2819: 	}
                   2820:     } else {
                   2821: 	$result="rejected\n";
                   2822:     }
                   2823:     return $result;
                   2824: }
1.91      albertel 2825: 
                   2826: sub make_passwd_file {
1.98      foxr     2827:     my ($uname, $umode,$npass,$passfilename)=@_;
1.91      albertel 2828:     my $result="ok\n";
                   2829:     if ($umode eq 'krb4' or $umode eq 'krb5') {
                   2830: 	{
                   2831: 	    my $pf = IO::File->new(">$passfilename");
                   2832: 	    print $pf "$umode:$npass\n";
                   2833: 	}
                   2834:     } elsif ($umode eq 'internal') {
                   2835: 	my $salt=time;
                   2836: 	$salt=substr($salt,6,2);
                   2837: 	my $ncpass=crypt($npass,$salt);
                   2838: 	{
                   2839: 	    &Debug("Creating internal auth");
                   2840: 	    my $pf = IO::File->new(">$passfilename");
                   2841: 	    print $pf "internal:$ncpass\n"; 
                   2842: 	}
                   2843:     } elsif ($umode eq 'localauth') {
                   2844: 	{
                   2845: 	    my $pf = IO::File->new(">$passfilename");
                   2846: 	    print $pf "localauth:$npass\n";
                   2847: 	}
                   2848:     } elsif ($umode eq 'unix') {
                   2849: 	{
                   2850: 	    my $execpath="$perlvar{'lonDaemons'}/"."lcuseradd";
                   2851: 	    {
                   2852: 		&Debug("Executing external: ".$execpath);
1.98      foxr     2853: 		&Debug("user  = ".$uname.", Password =". $npass);
1.132     matthew  2854: 		my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log");
1.91      albertel 2855: 		print $se "$uname\n";
                   2856: 		print $se "$npass\n";
                   2857: 		print $se "$npass\n";
1.97      foxr     2858: 	    }
                   2859: 	    my $useraddok = $?;
                   2860: 	    if($useraddok > 0) {
                   2861: 		&logthis("Failed lcuseradd: ".&lcuseraddstrerror($useraddok));
1.91      albertel 2862: 	    }
                   2863: 	    my $pf = IO::File->new(">$passfilename");
                   2864: 	    print $pf "unix:\n";
                   2865: 	}
                   2866:     } elsif ($umode eq 'none') {
                   2867: 	{
                   2868: 	    my $pf = IO::File->new(">$passfilename");
                   2869: 	    print $pf "none:\n";
                   2870: 	}
                   2871:     } else {
                   2872: 	$result="auth_mode_error\n";
                   2873:     }
                   2874:     return $result;
1.121     albertel 2875: }
                   2876: 
                   2877: sub sethost {
                   2878:     my ($remotereq) = @_;
                   2879:     my (undef,$hostid)=split(/:/,$remotereq);
                   2880:     if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
                   2881:     if ($hostip{$perlvar{'lonHostID'}} eq $hostip{$hostid}) {
                   2882: 	$currenthostid=$hostid;
                   2883: 	$currentdomainid=$hostdom{$hostid};
                   2884: 	&logthis("Setting hostid to $hostid, and domain to $currentdomainid");
                   2885:     } else {
                   2886: 	&logthis("Requested host id $hostid not an alias of ".
                   2887: 		 $perlvar{'lonHostID'}." refusing connection");
                   2888: 	return 'unable_to_set';
                   2889:     }
                   2890:     return 'ok';
                   2891: }
                   2892: 
                   2893: sub version {
                   2894:     my ($userinput)=@_;
                   2895:     $remoteVERSION=(split(/:/,$userinput))[1];
                   2896:     return "version:$VERSION";
1.127     albertel 2897: }
                   2898: 
1.128     albertel 2899: #There is a copy of this in lonnet.pm
1.127     albertel 2900: sub userload {
                   2901:     my $numusers=0;
                   2902:     {
                   2903: 	opendir(LONIDS,$perlvar{'lonIDsDir'});
                   2904: 	my $filename;
                   2905: 	my $curtime=time;
                   2906: 	while ($filename=readdir(LONIDS)) {
                   2907: 	    if ($filename eq '.' || $filename eq '..') {next;}
1.138     albertel 2908: 	    my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
1.159     albertel 2909: 	    if ($curtime-$mtime < 1800) { $numusers++; }
1.127     albertel 2910: 	}
                   2911: 	closedir(LONIDS);
                   2912:     }
                   2913:     my $userloadpercent=0;
                   2914:     my $maxuserload=$perlvar{'lonUserLoadLim'};
                   2915:     if ($maxuserload) {
1.129     albertel 2916: 	$userloadpercent=100*$numusers/$maxuserload;
1.127     albertel 2917:     }
1.130     albertel 2918:     $userloadpercent=sprintf("%.2f",$userloadpercent);
1.127     albertel 2919:     return $userloadpercent;
1.91      albertel 2920: }
                   2921: 
1.61      harris41 2922: # ----------------------------------- POD (plain old documentation, CPAN style)
                   2923: 
                   2924: =head1 NAME
                   2925: 
                   2926: lond - "LON Daemon" Server (port "LOND" 5663)
                   2927: 
                   2928: =head1 SYNOPSIS
                   2929: 
1.74      harris41 2930: Usage: B<lond>
                   2931: 
                   2932: Should only be run as user=www.  This is a command-line script which
                   2933: is invoked by B<loncron>.  There is no expectation that a typical user
                   2934: will manually start B<lond> from the command-line.  (In other words,
                   2935: DO NOT START B<lond> YOURSELF.)
1.61      harris41 2936: 
                   2937: =head1 DESCRIPTION
                   2938: 
1.74      harris41 2939: There are two characteristics associated with the running of B<lond>,
                   2940: PROCESS MANAGEMENT (starting, stopping, handling child processes)
                   2941: and SERVER-SIDE ACTIVITIES (password authentication, user creation,
                   2942: subscriptions, etc).  These are described in two large
                   2943: sections below.
                   2944: 
                   2945: B<PROCESS MANAGEMENT>
                   2946: 
1.61      harris41 2947: Preforker - server who forks first. Runs as a daemon. HUPs.
                   2948: Uses IDEA encryption
                   2949: 
1.74      harris41 2950: B<lond> forks off children processes that correspond to the other servers
                   2951: in the network.  Management of these processes can be done at the
                   2952: parent process level or the child process level.
                   2953: 
                   2954: B<logs/lond.log> is the location of log messages.
                   2955: 
                   2956: The process management is now explained in terms of linux shell commands,
                   2957: subroutines internal to this code, and signal assignments:
                   2958: 
                   2959: =over 4
                   2960: 
                   2961: =item *
                   2962: 
                   2963: PID is stored in B<logs/lond.pid>
                   2964: 
                   2965: This is the process id number of the parent B<lond> process.
                   2966: 
                   2967: =item *
                   2968: 
                   2969: SIGTERM and SIGINT
                   2970: 
                   2971: Parent signal assignment:
                   2972:  $SIG{INT}  = $SIG{TERM} = \&HUNTSMAN;
                   2973: 
                   2974: Child signal assignment:
                   2975:  $SIG{INT}  = 'DEFAULT'; (and SIGTERM is DEFAULT also)
                   2976: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber
                   2977:  to restart a new child.)
                   2978: 
                   2979: Command-line invocations:
                   2980:  B<kill> B<-s> SIGTERM I<PID>
                   2981:  B<kill> B<-s> SIGINT I<PID>
                   2982: 
                   2983: Subroutine B<HUNTSMAN>:
                   2984:  This is only invoked for the B<lond> parent I<PID>.
                   2985: This kills all the children, and then the parent.
                   2986: The B<lonc.pid> file is cleared.
                   2987: 
                   2988: =item *
                   2989: 
                   2990: SIGHUP
                   2991: 
                   2992: Current bug:
                   2993:  This signal can only be processed the first time
                   2994: on the parent process.  Subsequent SIGHUP signals
                   2995: have no effect.
                   2996: 
                   2997: Parent signal assignment:
                   2998:  $SIG{HUP}  = \&HUPSMAN;
                   2999: 
                   3000: Child signal assignment:
                   3001:  none (nothing happens)
                   3002: 
                   3003: Command-line invocations:
                   3004:  B<kill> B<-s> SIGHUP I<PID>
                   3005: 
                   3006: Subroutine B<HUPSMAN>:
                   3007:  This is only invoked for the B<lond> parent I<PID>,
                   3008: This kills all the children, and then the parent.
                   3009: The B<lond.pid> file is cleared.
                   3010: 
                   3011: =item *
                   3012: 
                   3013: SIGUSR1
                   3014: 
                   3015: Parent signal assignment:
                   3016:  $SIG{USR1} = \&USRMAN;
                   3017: 
                   3018: Child signal assignment:
                   3019:  $SIG{USR1}= \&logstatus;
                   3020: 
                   3021: Command-line invocations:
                   3022:  B<kill> B<-s> SIGUSR1 I<PID>
                   3023: 
                   3024: Subroutine B<USRMAN>:
                   3025:  When invoked for the B<lond> parent I<PID>,
                   3026: SIGUSR1 is sent to all the children, and the status of
                   3027: each connection is logged.
1.144     foxr     3028: 
                   3029: =item *
                   3030: 
                   3031: SIGUSR2
                   3032: 
                   3033: Parent Signal assignment:
                   3034:     $SIG{USR2} = \&UpdateHosts
                   3035: 
                   3036: Child signal assignment:
                   3037:     NONE
                   3038: 
1.74      harris41 3039: 
                   3040: =item *
                   3041: 
                   3042: SIGCHLD
                   3043: 
                   3044: Parent signal assignment:
                   3045:  $SIG{CHLD} = \&REAPER;
                   3046: 
                   3047: Child signal assignment:
                   3048:  none
                   3049: 
                   3050: Command-line invocations:
                   3051:  B<kill> B<-s> SIGCHLD I<PID>
                   3052: 
                   3053: Subroutine B<REAPER>:
                   3054:  This is only invoked for the B<lond> parent I<PID>.
                   3055: Information pertaining to the child is removed.
                   3056: The socket port is cleaned up.
                   3057: 
                   3058: =back
                   3059: 
                   3060: B<SERVER-SIDE ACTIVITIES>
                   3061: 
                   3062: Server-side information can be accepted in an encrypted or non-encrypted
                   3063: method.
                   3064: 
                   3065: =over 4
                   3066: 
                   3067: =item ping
                   3068: 
                   3069: Query a client in the hosts.tab table; "Are you there?"
                   3070: 
                   3071: =item pong
                   3072: 
                   3073: Respond to a ping query.
                   3074: 
                   3075: =item ekey
                   3076: 
                   3077: Read in encrypted key, make cipher.  Respond with a buildkey.
                   3078: 
                   3079: =item load
                   3080: 
                   3081: Respond with CPU load based on a computation upon /proc/loadavg.
                   3082: 
                   3083: =item currentauth
                   3084: 
                   3085: Reply with current authentication information (only over an
                   3086: encrypted channel).
                   3087: 
                   3088: =item auth
                   3089: 
                   3090: Only over an encrypted channel, reply as to whether a user's
                   3091: authentication information can be validated.
                   3092: 
                   3093: =item passwd
                   3094: 
                   3095: Allow for a password to be set.
                   3096: 
                   3097: =item makeuser
                   3098: 
                   3099: Make a user.
                   3100: 
                   3101: =item passwd
                   3102: 
                   3103: Allow for authentication mechanism and password to be changed.
                   3104: 
                   3105: =item home
1.61      harris41 3106: 
1.74      harris41 3107: Respond to a question "are you the home for a given user?"
                   3108: 
                   3109: =item update
                   3110: 
                   3111: Update contents of a subscribed resource.
                   3112: 
                   3113: =item unsubscribe
                   3114: 
                   3115: The server is unsubscribing from a resource.
                   3116: 
                   3117: =item subscribe
                   3118: 
                   3119: The server is subscribing to a resource.
                   3120: 
                   3121: =item log
                   3122: 
                   3123: Place in B<logs/lond.log>
                   3124: 
                   3125: =item put
                   3126: 
                   3127: stores hash in namespace
                   3128: 
                   3129: =item rolesput
                   3130: 
                   3131: put a role into a user's environment
                   3132: 
                   3133: =item get
                   3134: 
                   3135: returns hash with keys from array
                   3136: reference filled in from namespace
                   3137: 
                   3138: =item eget
                   3139: 
                   3140: returns hash with keys from array
                   3141: reference filled in from namesp (encrypts the return communication)
                   3142: 
                   3143: =item rolesget
                   3144: 
                   3145: get a role from a user's environment
                   3146: 
                   3147: =item del
                   3148: 
                   3149: deletes keys out of array from namespace
                   3150: 
                   3151: =item keys
                   3152: 
                   3153: returns namespace keys
                   3154: 
                   3155: =item dump
                   3156: 
                   3157: dumps the complete (or key matching regexp) namespace into a hash
                   3158: 
                   3159: =item store
                   3160: 
                   3161: stores hash permanently
                   3162: for this url; hashref needs to be given and should be a \%hashname; the
                   3163: remaining args aren't required and if they aren't passed or are '' they will
                   3164: be derived from the ENV
                   3165: 
                   3166: =item restore
                   3167: 
                   3168: returns a hash for a given url
                   3169: 
                   3170: =item querysend
                   3171: 
                   3172: Tells client about the lonsql process that has been launched in response
                   3173: to a sent query.
                   3174: 
                   3175: =item queryreply
                   3176: 
                   3177: Accept information from lonsql and make appropriate storage in temporary
                   3178: file space.
                   3179: 
                   3180: =item idput
                   3181: 
                   3182: Defines usernames as corresponding to IDs.  (These "IDs" are unique identifiers
                   3183: for each student, defined perhaps by the institutional Registrar.)
                   3184: 
                   3185: =item idget
                   3186: 
                   3187: Returns usernames corresponding to IDs.  (These "IDs" are unique identifiers
                   3188: for each student, defined perhaps by the institutional Registrar.)
                   3189: 
                   3190: =item tmpput
                   3191: 
                   3192: Accept and store information in temporary space.
                   3193: 
                   3194: =item tmpget
                   3195: 
                   3196: Send along temporarily stored information.
                   3197: 
                   3198: =item ls
                   3199: 
                   3200: List part of a user's directory.
                   3201: 
1.135     foxr     3202: =item pushtable
                   3203: 
                   3204: Pushes a file in /home/httpd/lonTab directory.  Currently limited to:
                   3205: hosts.tab and domain.tab. The old file is copied to  *.tab.backup but
                   3206: must be restored manually in case of a problem with the new table file.
                   3207: pushtable requires that the request be encrypted and validated via
                   3208: ValidateManager.  The form of the command is:
                   3209: enc:pushtable tablename <tablecontents> \n
                   3210: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a 
                   3211: cleartext newline.
                   3212: 
1.74      harris41 3213: =item Hanging up (exit or init)
                   3214: 
                   3215: What to do when a client tells the server that they (the client)
                   3216: are leaving the network.
                   3217: 
                   3218: =item unknown command
                   3219: 
                   3220: If B<lond> is sent an unknown command (not in the list above),
                   3221: it replys to the client "unknown_cmd".
1.135     foxr     3222: 
1.74      harris41 3223: 
                   3224: =item UNKNOWN CLIENT
                   3225: 
                   3226: If the anti-spoofing algorithm cannot verify the client,
                   3227: the client is rejected (with a "refused" message sent
                   3228: to the client, and the connection is closed.
                   3229: 
                   3230: =back
1.61      harris41 3231: 
                   3232: =head1 PREREQUISITES
                   3233: 
                   3234: IO::Socket
                   3235: IO::File
                   3236: Apache::File
                   3237: Symbol
                   3238: POSIX
                   3239: Crypt::IDEA
                   3240: LWP::UserAgent()
                   3241: GDBM_File
                   3242: Authen::Krb4
1.91      albertel 3243: Authen::Krb5
1.61      harris41 3244: 
                   3245: =head1 COREQUISITES
                   3246: 
                   3247: =head1 OSNAMES
                   3248: 
                   3249: linux
                   3250: 
                   3251: =head1 SCRIPT CATEGORIES
                   3252: 
                   3253: Server/Process
                   3254: 
                   3255: =cut

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