loncom/lond - view

File: [LON-CAPA] / loncom / lond
Revision 1.472: download - view: text, annotated - select for diffs
Fri May 13 02:58:02 2011 UTC (12 years, 11 months ago) by raeburn
Branches: MAIN
CVS tags: HEAD

- Routine to check if server is a LON-CAPA "DNS" server.
- Only log warning about missing managers.tab if server is a DNS server.
- Limit files which can be modified via PushFile to:
  hosts.tab, domain.tab, dns_hosts.tab and dns_domain.tab
- Send e-mail to Admin when a remote manager has called "pushfile" to
  update dns_hosts.tab or dns_domain.tab.

1: #!/usr/bin/perl 2: # The LearningOnline Network 3: # lond "LON Daemon" Server (port "LOND" 5663) 4: # 5: # $Id: lond,v 1.472 2011/05/13 02:58:02 raeburn Exp $ 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: 19: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20: # GNU General Public License for more details. 21: # 22: # You should have received a copy of the GNU General Public License 23: # along with LON-CAPA; if not, write to the Free Software 24: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 25: # 26: # /home/httpd/html/adm/gpl.txt 27: # 28: 29: 30: # http://www.lon-capa.org/ 31: # 32: 33: use strict; 34: use lib '/home/httpd/lib/perl/'; 35: use LONCAPA; 36: use LONCAPA::Configuration; 37: 38: use IO::Socket; 39: use IO::File; 40: #use Apache::File; 41: use POSIX; 42: use Crypt::IDEA; 43: use LWP::UserAgent(); 44: use Digest::MD5 qw(md5_hex); 45: use GDBM_File; 46: use Authen::Krb5; 47: use localauth; 48: use localenroll; 49: use localstudentphoto; 50: use File::Copy; 51: use File::Find; 52: use LONCAPA::lonlocal; 53: use LONCAPA::lonssl; 54: use Fcntl qw(:flock); 55: use Apache::lonnet; 56: use Mail::Send; 57: 58: my $DEBUG = 0; # Non zero to enable debug log entries. 59: 60: my $status=''; 61: my $lastlog=''; 62: 63: my $VERSION='$Revision: 1.472 $'; #' stupid emacs 64: my $remoteVERSION; 65: my $currenthostid="default"; 66: my $currentdomainid; 67: 68: my $client; 69: my $clientip; # IP address of client. 70: my $clientname; # LonCAPA name of client. 71: my $clientversion; # LonCAPA version running on client. 72: my $clienthomedom; # LonCAPA domain of homeID for client. 73: # primary library server. 74: 75: my $server; 76: 77: my $keymode; 78: 79: my $cipher; # Cipher key negotiated with client 80: my $tmpsnum = 0; # Id of tmpputs. 81: 82: # 83: # Connection type is: 84: # client - All client actions are allowed 85: # manager - only management functions allowed. 86: # both - Both management and client actions are allowed 87: # 88: 89: my $ConnectionType; 90: 91: my %managers; # Ip -> manager names 92: 93: my %perlvar; # Will have the apache conf defined perl vars. 94: 95: # 96: # The hash below is used for command dispatching, and is therefore keyed on the request keyword. 97: # Each element of the hash contains a reference to an array that contains: 98: # A reference to a sub that executes the request corresponding to the keyword. 99: # A flag that is true if the request must be encoded to be acceptable. 100: # A mask with bits as follows: 101: # CLIENT_OK - Set when the function is allowed by ordinary clients 102: # MANAGER_OK - Set when the function is allowed to manager clients. 103: # 104: my $CLIENT_OK = 1; 105: my $MANAGER_OK = 2; 106: my %Dispatcher; 107: 108: 109: # 110: # The array below are password error strings." 111: # 112: my $lastpwderror = 13; # Largest error number from lcpasswd. 113: my @passwderrors = ("ok", 114: "pwchange_failure - lcpasswd must be run as user 'www'", 115: "pwchange_failure - lcpasswd got incorrect number of arguments", 116: "pwchange_failure - lcpasswd did not get the right nubmer of input text lines", 117: "pwchange_failure - lcpasswd too many simultaneous pwd changes in progress", 118: "pwchange_failure - lcpasswd User does not exist.", 119: "pwchange_failure - lcpasswd Incorrect current passwd", 120: "pwchange_failure - lcpasswd Unable to su to root.", 121: "pwchange_failure - lcpasswd Cannot set new passwd.", 122: "pwchange_failure - lcpasswd Username has invalid characters", 123: "pwchange_failure - lcpasswd Invalid characters in password", 124: "pwchange_failure - lcpasswd User already exists", 125: "pwchange_failure - lcpasswd Something went wrong with user addition.", 126: "pwchange_failure - lcpasswd Password mismatch", 127: "pwchange_failure - lcpasswd Error filename is invalid"); 128: 129: 130: # The array below are lcuseradd error strings.: 131: 132: my $lastadderror = 13; 133: my @adderrors = ("ok", 134: "User ID mismatch, lcuseradd must run as user www", 135: "lcuseradd Incorrect number of command line parameters must be 3", 136: "lcuseradd Incorrect number of stdinput lines, must be 3", 137: "lcuseradd Too many other simultaneous pwd changes in progress", 138: "lcuseradd User does not exist", 139: "lcuseradd Unable to make www member of users's group", 140: "lcuseradd Unable to su to root", 141: "lcuseradd Unable to set password", 142: "lcuseradd Username has invalid characters", 143: "lcuseradd Password has an invalid character", 144: "lcuseradd User already exists", 145: "lcuseradd Could not add user.", 146: "lcuseradd Password mismatch"); 147: 148: 149: # This array are the errors from lcinstallfile: 150: 151: my @installerrors = ("ok", 152: "Initial user id of client not that of www", 153: "Usage error, not enough command line arguments", 154: "Source file name does not exist", 155: "Destination file name does not exist", 156: "Some file operation failed", 157: "Invalid table filename." 158: ); 159: 160: # 161: # Statistics that are maintained and dislayed in the status line. 162: # 163: my $Transactions = 0; # Number of attempted transactions. 164: my $Failures = 0; # Number of transcations failed. 165: 166: # ResetStatistics: 167: # Resets the statistics counters: 168: # 169: sub ResetStatistics { 170: $Transactions = 0; 171: $Failures = 0; 172: } 173: 174: #------------------------------------------------------------------------ 175: # 176: # LocalConnection 177: # Completes the formation of a locally authenticated connection. 178: # This function will ensure that the 'remote' client is really the 179: # local host. If not, the connection is closed, and the function fails. 180: # If so, initcmd is parsed for the name of a file containing the 181: # IDEA session key. The fie is opened, read, deleted and the session 182: # key returned to the caller. 183: # 184: # Parameters: 185: # $Socket - Socket open on client. 186: # $initcmd - The full text of the init command. 187: # 188: # Returns: 189: # IDEA session key on success. 190: # undef on failure. 191: # 192: sub LocalConnection { 193: my ($Socket, $initcmd) = @_; 194: Debug("Attempting local connection: $initcmd client: $clientip"); 195: if($clientip ne "127.0.0.1") { 196: &logthis(' LocalConnection rejecting non local: ' 197: ."$clientip ne 127.0.0.1 "); 198: close $Socket; 199: return undef; 200: } else { 201: chomp($initcmd); # Get rid of \n in filename. 202: my ($init, $type, $name) = split(/:/, $initcmd); 203: Debug(" Init command: $init $type $name "); 204: 205: # Require that $init = init, and $type = local: Otherwise 206: # the caller is insane: 207: 208: if(($init ne "init") && ($type ne "local")) { 209: &logthis(' LocalConnection: caller is insane! ' 210: ."init = $init, and type = $type "); 211: close($Socket);; 212: return undef; 213: 214: } 215: # Now get the key filename: 216: 217: my $IDEAKey = lonlocal::ReadKeyFile($name); 218: return $IDEAKey; 219: } 220: } 221: #------------------------------------------------------------------------------ 222: # 223: # SSLConnection 224: # Completes the formation of an ssh authenticated connection. The 225: # socket is promoted to an ssl socket. If this promotion and the associated 226: # certificate exchange are successful, the IDEA key is generated and sent 227: # to the remote peer via the SSL tunnel. The IDEA key is also returned to 228: # the caller after the SSL tunnel is torn down. 229: # 230: # Parameters: 231: # Name Type Purpose 232: # $Socket IO::Socket::INET Plaintext socket. 233: # 234: # Returns: 235: # IDEA key on success. 236: # undef on failure. 237: # 238: sub SSLConnection { 239: my $Socket = shift; 240: 241: Debug("SSLConnection: "); 242: my $KeyFile = lonssl::KeyFile(); 243: if(!$KeyFile) { 244: my $err = lonssl::LastError(); 245: &logthis(" CRITICAL" 246: ."Can't get key file $err "); 247: return undef; 248: } 249: my ($CACertificate, 250: $Certificate) = lonssl::CertificateFile(); 251: 252: 253: # If any of the key, certificate or certificate authority 254: # certificate filenames are not defined, this can't work. 255: 256: if((!$Certificate) || (!$CACertificate)) { 257: my $err = lonssl::LastError(); 258: &logthis(" CRITICAL" 259: ."Can't get certificates: $err "); 260: 261: return undef; 262: } 263: Debug("Key: $KeyFile CA: $CACertificate Cert: $Certificate"); 264: 265: # Indicate to our peer that we can procede with 266: # a transition to ssl authentication: 267: 268: print $Socket "ok:ssl\n"; 269: 270: Debug("Approving promotion -> ssl"); 271: # And do so: 272: 273: my $SSLSocket = lonssl::PromoteServerSocket($Socket, 274: $CACertificate, 275: $Certificate, 276: $KeyFile); 277: if(! ($SSLSocket) ) { # SSL socket promotion failed. 278: my $err = lonssl::LastError(); 279: &logthis(" CRITICAL " 280: ."SSL Socket promotion failed: $err "); 281: return undef; 282: } 283: Debug("SSL Promotion successful"); 284: 285: # 286: # The only thing we'll use the socket for is to send the IDEA key 287: # to the peer: 288: 289: my $Key = lonlocal::CreateCipherKey(); 290: print $SSLSocket "$Key\n"; 291: 292: lonssl::Close($SSLSocket); 293: 294: Debug("Key exchange complete: $Key"); 295: 296: return $Key; 297: } 298: # 299: # InsecureConnection: 300: # If insecure connections are allowd, 301: # exchange a challenge with the client to 'validate' the 302: # client (not really, but that's the protocol): 303: # We produce a challenge string that's sent to the client. 304: # The client must then echo the challenge verbatim to us. 305: # 306: # Parameter: 307: # Socket - Socket open on the client. 308: # Returns: 309: # 1 - success. 310: # 0 - failure (e.g.mismatch or insecure not allowed). 311: # 312: sub InsecureConnection { 313: my $Socket = shift; 314: 315: # Don't even start if insecure connections are not allowed. 316: 317: if(! $perlvar{londAllowInsecure}) { # Insecure connections not allowed. 318: return 0; 319: } 320: 321: # Fabricate a challenge string and send it.. 322: 323: my $challenge = "$$".time; # pid + time. 324: print $Socket "$challenge\n"; 325: &status("Waiting for challenge reply"); 326: 327: my $answer = <$Socket>; 328: $answer =~s/\W//g; 329: if($challenge eq $answer) { 330: return 1; 331: } else { 332: logthis("WARNING client did not respond to challenge"); 333: &status("No challenge reqply"); 334: return 0; 335: } 336: 337: 338: } 339: # 340: # Safely execute a command (as long as it's not a shel command and doesn 341: # not require/rely on shell escapes. The function operates by doing a 342: # a pipe based fork and capturing stdout and stderr from the pipe. 343: # 344: # Formal Parameters: 345: # $line - A line of text to be executed as a command. 346: # Returns: 347: # The output from that command. If the output is multiline the caller 348: # must know how to split up the output. 349: # 350: # 351: sub execute_command { 352: my ($line) = @_; 353: my @words = split(/\s/, $line); # Bust the command up into words. 354: my $output = ""; 355: 356: my $pid = open(CHILD, "-|"); 357: 358: if($pid) { # Parent process 359: Debug("In parent process for execute_command"); 360: my @data = <CHILD>; # Read the child's outupt... 361: close CHILD; 362: foreach my $output_line (@data) { 363: Debug("Adding $output_line"); 364: $output .= $output_line; # Presumably has a \n on it. 365: } 366: 367: } else { # Child process 368: close (STDERR); 369: open (STDERR, ">&STDOUT");# Combine stderr, and stdout... 370: exec(@words); # won't return. 371: } 372: return $output; 373: } 374: 375: 376: # GetCertificate: Given a transaction that requires a certificate, 377: # this function will extract the certificate from the transaction 378: # request. Note that at this point, the only concept of a certificate 379: # is the hostname to which we are connected. 380: # 381: # Parameter: 382: # request - The request sent by our client (this parameterization may 383: # need to change when we really use a certificate granting 384: # authority. 385: # 386: sub GetCertificate { 387: my $request = shift; 388: 389: return $clientip; 390: } 391: 392: # 393: # Return true if client is a manager. 394: # 395: sub isManager { 396: return (($ConnectionType eq "manager") || ($ConnectionType eq "both")); 397: } 398: # 399: # Return tru if client can do client functions 400: # 401: sub isClient { 402: return (($ConnectionType eq "client") || ($ConnectionType eq "both")); 403: } 404: 405: 406: # 407: # ReadManagerTable: Reads in the current manager table. For now this is 408: # done on each manager authentication because: 409: # - These authentications are not frequent 410: # - This allows dynamic changes to the manager table 411: # without the need to signal to the lond. 412: # 413: sub ReadManagerTable { 414: 415: &Debug("Reading manager table"); 416: # Clean out the old table first.. 417: 418: foreach my $key (keys %managers) { 419: delete $managers{$key}; 420: } 421: 422: my $tablename = $perlvar{'lonTabDir'}."/managers.tab"; 423: if (!open (MANAGERS, $tablename)) { 424: if (&loncapa_dns_server()) { 425: &logthis('No manager table. Nobody can manage!!'); 426: } 427: return; 428: } 429: while(my $host = <MANAGERS>) { 430: chomp($host); 431: if ($host =~ "^#") { # Comment line. 432: next; 433: } 434: if (!defined &Apache::lonnet::get_host_ip($host)) { # This is a non cluster member 435: # The entry is of the form: 436: # cluname:hostname 437: # cluname - A 'cluster hostname' is needed in order to negotiate 438: # the host key. 439: # hostname- The dns name of the host. 440: # 441: my($cluname, $dnsname) = split(/:/, $host); 442: 443: my $ip = gethostbyname($dnsname); 444: if(defined($ip)) { # bad names don't deserve entry. 445: my $hostip = inet_ntoa($ip); 446: $managers{$hostip} = $cluname; 447: logthis(' registering manager '. 448: "$dnsname as $cluname with $hostip \n"); 449: } 450: } else { 451: logthis(' existing host'." $host\n"); 452: $managers{&Apache::lonnet::get_host_ip($host)} = $host; # Use info from cluster tab if cluster memeber 453: } 454: } 455: } 456: 457: # 458: # ValidManager: Determines if a given certificate represents a valid manager. 459: # in this primitive implementation, the 'certificate' is 460: # just the connecting loncapa client name. This is checked 461: # against a valid client list in the configuration. 462: # 463: # 464: sub ValidManager { 465: my $certificate = shift; 466: 467: return isManager; 468: } 469: # 470: # CopyFile: Called as part of the process of installing a 471: # new configuration file. This function copies an existing 472: # file to a backup file. 473: # Parameters: 474: # oldfile - Name of the file to backup. 475: # newfile - Name of the backup file. 476: # Return: 477: # 0 - Failure (errno has failure reason). 478: # 1 - Success. 479: # 480: sub CopyFile { 481: 482: my ($oldfile, $newfile) = @_; 483: 484: if (! copy($oldfile,$newfile)) { 485: return 0; 486: } 487: chmod(0660, $newfile); 488: return 1; 489: } 490: # 491: # Host files are passed out with externally visible host IPs. 492: # If, for example, we are behind a fire-wall or NAT host, our 493: # internally visible IP may be different than the externally 494: # visible IP. Therefore, we always adjust the contents of the 495: # host file so that the entry for ME is the IP that we believe 496: # we have. At present, this is defined as the entry that 497: # DNS has for us. If by some chance we are not able to get a 498: # DNS translation for us, then we assume that the host.tab file 499: # is correct. 500: # BUGBUGBUG - in the future, we really should see if we can 501: # easily query the interface(s) instead. 502: # Parameter(s): 503: # contents - The contents of the host.tab to check. 504: # Returns: 505: # newcontents - The adjusted contents. 506: # 507: # 508: sub AdjustHostContents { 509: my $contents = shift; 510: my $adjusted; 511: my $me = $perlvar{'lonHostID'}; 512: 513: foreach my $line (split(/\n/,$contents)) { 514: if(!(($line eq "") || ($line =~ /^ *\#/) || ($line =~ /^ *$/) || 515: ($line =~ /^\s*\^/))) { 516: chomp($line); 517: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon)=split(/:/,$line); 518: if ($id eq $me) { 519: my $ip = gethostbyname($name); 520: my $ipnew = inet_ntoa($ip); 521: $ip = $ipnew; 522: # Reconstruct the host line and append to adjusted: 523: 524: my $newline = "$id:$domain:$role:$name:$ip"; 525: if($maxcon ne "") { # Not all hosts have loncnew tuning params 526: $newline .= ":$maxcon:$idleto:$mincon"; 527: } 528: $adjusted .= $newline."\n"; 529: 530: } else { # Not me, pass unmodified. 531: $adjusted .= $line."\n"; 532: } 533: } else { # Blank or comment never re-written. 534: $adjusted .= $line."\n"; # Pass blanks and comments as is. 535: } 536: } 537: return $adjusted; 538: } 539: # 540: # InstallFile: Called to install an administrative file: 541: # - The file is created int a temp directory called <name>.tmp 542: # - lcinstall file is called to install the file. 543: # since the web app has no direct write access to the table directory 544: # 545: # Parameters: 546: # Name of the file 547: # File Contents. 548: # Return: 549: # nonzero - success. 550: # 0 - failure and $! has an errno. 551: # Assumptions: 552: # File installtion is a relatively infrequent 553: # 554: sub InstallFile { 555: 556: my ($Filename, $Contents) = @_; 557: # my $TempFile = $Filename.".tmp"; 558: my $exedir = $perlvar{'lonDaemons'}; 559: my $tmpdir = $exedir.'/tmp/'; 560: my $TempFile = $tmpdir."TempTableFile.tmp"; 561: 562: # Open the file for write: 563: 564: my $fh = IO::File->new("> $TempFile"); # Write to temp. 565: if(!(defined $fh)) { 566: &logthis(' Unable to create '.$TempFile.""); 567: return 0; 568: } 569: # write the contents of the file: 570: 571: print $fh ($Contents); 572: $fh->close; # In case we ever have a filesystem w. locking 573: 574: chmod(0664, $TempFile); # Everyone can write it. 575: 576: # Use lcinstall file to put the file in the table directory... 577: 578: &Debug("Opening pipe to $exedir/lcinstallfile $TempFile $Filename"); 579: my $pf = IO::File->new("| $exedir/lcinstallfile $TempFile $Filename > $exedir/logs/lcinstallfile.log"); 580: close $pf; 581: my $err = $?; 582: &Debug("Status is $err"); 583: if ($err != 0) { 584: my $msg = $err; 585: if ($err < @installerrors) { 586: $msg = $installerrors[$err]; 587: } 588: &logthis("Install failed for table file $Filename : $msg"); 589: return 0; 590: } 591: 592: # Remove the temp file: 593: 594: unlink($TempFile); 595: 596: return 1; 597: } 598: 599: 600: # 601: # ConfigFileFromSelector: converts a configuration file selector 602: # into a configuration file pathname. 603: # Supports the following file selectors: 604: # hosts, domain, dns_hosts, dns_domain 605: # 606: # 607: # Parameters: 608: # selector - Configuration file selector. 609: # Returns: 610: # Full path to the file or undef if the selector is invalid. 611: # 612: sub ConfigFileFromSelector { 613: my $selector = shift; 614: my $tablefile; 615: 616: my $tabledir = $perlvar{'lonTabDir'}.'/'; 617: if (($selector eq "hosts") || ($selector eq "domain") || 618: ($selector eq "dns_hosts") || ($selector eq "dns_domain")) { 619: $tablefile = $tabledir.$selector.'.tab'; 620: } 621: return $tablefile; 622: } 623: # 624: # PushFile: Called to do an administrative push of a file. 625: # - Ensure the file being pushed is one we support. 626: # - Backup the old file to <filename.saved> 627: # - Separate the contents of the new file out from the 628: # rest of the request. 629: # - Write the new file. 630: # Parameter: 631: # Request - The entire user request. This consists of a : separated 632: # string pushfile:tablename:contents. 633: # NOTE: The contents may have :'s in it as well making things a bit 634: # more interesting... but not much. 635: # Returns: 636: # String to send to client ("ok" or "refused" if bad file). 637: # 638: sub PushFile { 639: my $request = shift; 640: my ($command, $filename, $contents) = split(":", $request, 3); 641: &Debug("PushFile"); 642: 643: # At this point in time, pushes for only the following tables are 644: # supported: 645: # hosts.tab ($filename eq host). 646: # domain.tab ($filename eq domain). 647: # dns_hosts.tab ($filename eq dns_host). 648: # dns_domain.tab ($filename eq dns_domain). 649: # Construct the destination filename or reject the request. 650: # 651: # lonManage is supposed to ensure this, however this session could be 652: # part of some elaborate spoof that managed somehow to authenticate. 653: # 654: 655: 656: my $tablefile = ConfigFileFromSelector($filename); 657: if(! (defined $tablefile)) { 658: return "refused"; 659: } 660: 661: # If the file being pushed is the host file, we adjust the entry for ourself so that the 662: # IP will be our current IP as looked up in dns. Note this is only 99% good as it's possible 663: # to conceive of conditions where we don't have a DNS entry locally. This is possible in a 664: # network sense but it doesn't make much sense in a LonCAPA sense so we ignore (for now) 665: # that possibilty. 666: 667: if($filename eq "host") { 668: $contents = AdjustHostContents($contents); 669: } 670: 671: # Install the new file: 672: 673: &logthis("Installing new $tablefile contents:\n$contents"); 674: if(!InstallFile($tablefile, $contents)) { 675: &logthis(' Pushfile: unable to install ' 676: .$tablefile." $! "); 677: return "error:$!"; 678: } else { 679: &logthis(' Installed new '.$tablefile 680: .""); 681: my $adminmail = $perlvar{'lonAdmEMail'}; 682: my $admindom = &Apache::lonnet::host_domain($perlvar{'lonHostID'}); 683: if ($admindom ne '') { 684: my %domconfig = 685: &Apache::lonnet::get_dom('configuration',['contacts'],$admindom); 686: if (ref($domconfig{'contacts'}) eq 'HASH') { 687: if ($domconfig{'contacts'}{'adminemail'} ne '') { 688: $adminmail = $domconfig{'contacts'}{'adminemail'}; 689: } 690: } 691: } 692: if ($adminmail =~ /^[^\@]+\@[^\@]+$/) { 693: my $msg = new Mail::Send; 694: my $senderaddress = $perlvar{'lonSysEMail'}; 695: $msg->to($adminmail); 696: $msg->subject('LON-CAPA DNS update on '.$perlvar{'lonHostID'}); 697: if ($senderaddress) { 698: $msg->add('From',$senderaddress); 699: } 700: $msg->add('Content-type','text/plain; charset=UTF-8'); 701: if (my $fh = $msg->open()) { 702: print $fh 'Update to '.$tablefile.' from Cluster Manager '. 703: $client."\n"; 704: $fh->close; 705: } 706: } 707: } 708: 709: # Indicate success: 710: 711: return "ok"; 712: 713: } 714: 715: sub loncapa_dns_server { 716: my $lonhost = &Apache::lonnet::get_host_ip($perlvar{'lonHostID'}); 717: my $hoststable = "$perlvar{'lonTabDir'}/hosts.tab"; 718: my $is_dns_server; 719: if (!open(HOSTS,"<$hoststable")) { 720: &logthis('Could not open hosts.tab to check for LON-CAPA DNS servers.'); 721: while (my $host = <HOSTS>) { 722: chomp($host); 723: $host =~ s/(^\s+|\s+$)//g; 724: if ($host =~ /^\Q^$lonhost\E/) { 725: $is_dns_server = 1; 726: last; 727: } 728: } 729: close(HOSTS); 730: } 731: return $is_dns_server; 732: } 733: 734: # 735: # Called to re-init either lonc or lond. 736: # 737: # Parameters: 738: # request - The full request by the client. This is of the form 739: # reinit:<process> 740: # where <process> is allowed to be either of 741: # lonc or lond 742: # 743: # Returns: 744: # The string to be sent back to the client either: 745: # ok - Everything worked just fine. 746: # error:why - There was a failure and why describes the reason. 747: # 748: # 749: sub ReinitProcess { 750: my $request = shift; 751: 752: 753: # separate the request (reinit) from the process identifier and 754: # validate it producing the name of the .pid file for the process. 755: # 756: # 757: my ($junk, $process) = split(":", $request); 758: my $processpidfile = $perlvar{'lonDaemons'}.'/logs/'; 759: if($process eq 'lonc') { 760: $processpidfile = $processpidfile."lonc.pid"; 761: if (!open(PIDFILE, "< $processpidfile")) { 762: return "error:Open failed for $processpidfile"; 763: } 764: my $loncpid = <PIDFILE>; 765: close(PIDFILE); 766: logthis(' Reinitializing lonc pid='.$loncpid 767: .""); 768: kill("USR2", $loncpid); 769: } elsif ($process eq 'lond') { 770: logthis(' Reinitializing self (lond) '); 771: &UpdateHosts; # Lond is us!! 772: } else { 773: &logthis('"); 775: return "error:Invalid process identifier $process"; 776: } 777: return 'ok'; 778: } 779: # Validate a line in a configuration file edit script: 780: # Validation includes: 781: # - Ensuring the command is valid. 782: # - Ensuring the command has sufficient parameters 783: # Parameters: 784: # scriptline - A line to validate (\n has been stripped for what it's worth). 785: # 786: # Return: 787: # 0 - Invalid scriptline. 788: # 1 - Valid scriptline 789: # NOTE: 790: # Only the command syntax is checked, not the executability of the 791: # command. 792: # 793: sub isValidEditCommand { 794: my $scriptline = shift; 795: 796: # Line elements are pipe separated: 797: 798: my ($command, $key, $newline) = split(/\|/, $scriptline); 799: &logthis(' isValideditCommand checking: '. 800: "Command = '$command', Key = '$key', Newline = '$newline' \n"); 801: 802: if ($command eq "delete") { 803: # 804: # key with no newline. 805: # 806: if( ($key eq "") || ($newline ne "")) { 807: return 0; # Must have key but no newline. 808: } else { 809: return 1; # Valid syntax. 810: } 811: } elsif ($command eq "replace") { 812: # 813: # key and newline: 814: # 815: if (($key eq "") || ($newline eq "")) { 816: return 0; 817: } else { 818: return 1; 819: } 820: } elsif ($command eq "append") { 821: if (($key ne "") && ($newline eq "")) { 822: return 1; 823: } else { 824: return 0; 825: } 826: } else { 827: return 0; # Invalid command. 828: } 829: return 0; # Should not get here!!! 830: } 831: # 832: # ApplyEdit - Applies an edit command to a line in a configuration 833: # file. It is the caller's responsiblity to validate the 834: # edit line. 835: # Parameters: 836: # $directive - A single edit directive to apply. 837: # Edit directives are of the form: 838: # append|newline - Appends a new line to the file. 839: # replace|key|newline - Replaces the line with key value 'key' 840: # delete|key - Deletes the line with key value 'key'. 841: # $editor - A config file editor object that contains the 842: # file being edited. 843: # 844: sub ApplyEdit { 845: 846: my ($directive, $editor) = @_; 847: 848: # Break the directive down into its command and its parameters 849: # (at most two at this point. The meaning of the parameters, if in fact 850: # they exist depends on the command). 851: 852: my ($command, $p1, $p2) = split(/\|/, $directive); 853: 854: if($command eq "append") { 855: $editor->Append($p1); # p1 - key p2 null. 856: } elsif ($command eq "replace") { 857: $editor->ReplaceLine($p1, $p2); # p1 - key p2 = newline. 858: } elsif ($command eq "delete") { 859: $editor->DeleteLine($p1); # p1 - key p2 null. 860: } else { # Should not get here!!! 861: die "Invalid command given to ApplyEdit $command" 862: } 863: } 864: # 865: # AdjustOurHost: 866: # Adjusts a host file stored in a configuration file editor object 867: # for the true IP address of this host. This is necessary for hosts 868: # that live behind a firewall. 869: # Those hosts have a publicly distributed IP of the firewall, but 870: # internally must use their actual IP. We assume that a given 871: # host only has a single IP interface for now. 872: # Formal Parameters: 873: # editor - The configuration file editor to adjust. This 874: # editor is assumed to contain a hosts.tab file. 875: # Strategy: 876: # - Figure out our hostname. 877: # - Lookup the entry for this host. 878: # - Modify the line to contain our IP 879: # - Do a replace for this host. 880: sub AdjustOurHost { 881: my $editor = shift; 882: 883: # figure out who I am. 884: 885: my $myHostName = $perlvar{'lonHostID'}; # LonCAPA hostname. 886: 887: # Get my host file entry. 888: 889: my $ConfigLine = $editor->Find($myHostName); 890: if(! (defined $ConfigLine)) { 891: die "AdjustOurHost - no entry for me in hosts file $myHostName"; 892: } 893: # figure out my IP: 894: # Use the config line to get my hostname. 895: # Use gethostbyname to translate that into an IP address. 896: # 897: my ($id,$domain,$role,$name,$maxcon,$idleto,$mincon) = split(/:/,$ConfigLine); 898: # 899: # Reassemble the config line from the elements in the list. 900: # Note that if the loncnew items were not present before, they will 901: # be now even if they would be empty 902: # 903: my $newConfigLine = $id; 904: foreach my $item ($domain, $role, $name, $maxcon, $idleto, $mincon) { 905: $newConfigLine .= ":".$item; 906: } 907: # Replace the line: 908: 909: $editor->ReplaceLine($id, $newConfigLine); 910: 911: } 912: # 913: # ReplaceConfigFile: 914: # Replaces a configuration file with the contents of a 915: # configuration file editor object. 916: # This is done by: 917: # - Copying the target file to <filename>.old 918: # - Writing the new file to <filename>.tmp 919: # - Moving <filename.tmp> -> <filename> 920: # This laborious process ensures that the system is never without 921: # a configuration file that's at least valid (even if the contents 922: # may be dated). 923: # Parameters: 924: # filename - Name of the file to modify... this is a full path. 925: # editor - Editor containing the file. 926: # 927: sub ReplaceConfigFile { 928: 929: my ($filename, $editor) = @_; 930: 931: CopyFile ($filename, $filename.".old"); 932: 933: my $contents = $editor->Get(); # Get the contents of the file. 934: 935: InstallFile($filename, $contents); 936: } 937: # 938: # 939: # Called to edit a configuration table file 940: # Parameters: 941: # request - The entire command/request sent by lonc or lonManage 942: # Return: 943: # The reply to send to the client. 944: # 945: sub EditFile { 946: my $request = shift; 947: 948: # Split the command into it's pieces: edit:filetype:script 949: 950: my ($cmd, $filetype, $script) = split(/:/, $request,3); # : in script 951: 952: # Check the pre-coditions for success: 953: 954: if($cmd != "edit") { # Something is amiss afoot alack. 955: return "error:edit request detected, but request != 'edit'\n"; 956: } 957: if( ($filetype ne "hosts") && 958: ($filetype ne "domain")) { 959: return "error:edit requested with invalid file specifier: $filetype \n"; 960: } 961: 962: # Split the edit script and check it's validity. 963: 964: my @scriptlines = split(/\n/, $script); # one line per element. 965: my $linecount = scalar(@scriptlines); 966: for(my $i = 0; $i < $linecount; $i++) { 967: chomp($scriptlines[$i]); 968: if(!isValidEditCommand($scriptlines[$i])) { 969: return "error:edit with bad script line: '$scriptlines[$i]' \n"; 970: } 971: } 972: 973: # Execute the edit operation. 974: # - Create a config file editor for the appropriate file and 975: # - execute each command in the script: 976: # 977: my $configfile = ConfigFileFromSelector($filetype); 978: if (!(defined $configfile)) { 979: return "refused\n"; 980: } 981: my $editor = ConfigFileEdit->new($configfile); 982: 983: for (my $i = 0; $i < $linecount; $i++) { 984: ApplyEdit($scriptlines[$i], $editor); 985: } 986: # If the file is the host file, ensure that our host is 987: # adjusted to have our ip: 988: # 989: if($filetype eq "host") { 990: AdjustOurHost($editor); 991: } 992: # Finally replace the current file with our file. 993: # 994: ReplaceConfigFile($configfile, $editor); 995: 996: return "ok\n"; 997: } 998: 999: # read_profile 1000: # 1001: # Returns a set of specific entries from a user's profile file. 1002: # this is a utility function that is used by both get_profile_entry and 1003: # get_profile_entry_encrypted. 1004: # 1005: # Parameters: 1006: # udom - Domain in which the user exists. 1007: # uname - User's account name (loncapa account) 1008: # namespace - The profile namespace to open. 1009: # what - A set of & separated queries. 1010: # Returns: 1011: # If all ok: - The string that needs to be shipped back to the user. 1012: # If failure - A string that starts with error: followed by the failure 1013: # reason.. note that this probabyl gets shipped back to the 1014: # user as well. 1015: # 1016: sub read_profile { 1017: my ($udom, $uname, $namespace, $what) = @_; 1018: 1019: my $hashref = &tie_user_hash($udom, $uname, $namespace, 1020: &GDBM_READER()); 1021: if ($hashref) { 1022: my @queries=split(/\&/,$what); 1023: if ($namespace eq 'roles') { 1024: @queries = map { &unescape($_); } @queries; 1025: } 1026: my $qresult=''; 1027: 1028: for (my $i=0;$i<=$#queries;$i++) { 1029: $qresult.="$hashref->{$queries[$i]}&"; # Presumably failure gives empty string. 1030: } 1031: $qresult=~s/\&$//; # Remove trailing & from last lookup. 1032: if (&untie_user_hash($hashref)) { 1033: return $qresult; 1034: } else { 1035: return "error: ".($!+0)." untie (GDBM) Failed"; 1036: } 1037: } else { 1038: if ($!+0 == 2) { 1039: return "error:No such file or GDBM reported bad block error"; 1040: } else { 1041: return "error: ".($!+0)." tie (GDBM) Failed"; 1042: } 1043: } 1044: 1045: } 1046: #--------------------- Request Handlers -------------------------------------------- 1047: # 1048: # By convention each request handler registers itself prior to the sub 1049: # declaration: 1050: # 1051: 1052: #++ 1053: # 1054: # Handles ping requests. 1055: # Parameters: 1056: # $cmd - the actual keyword that invoked us. 1057: # $tail - the tail of the request that invoked us. 1058: # $replyfd- File descriptor connected to the client 1059: # Implicit Inputs: 1060: # $currenthostid - Global variable that carries the name of the host we are 1061: # known as. 1062: # Returns: 1063: # 1 - Ok to continue processing. 1064: # 0 - Program should exit. 1065: # Side effects: 1066: # Reply information is sent to the client. 1067: sub ping_handler { 1068: my ($cmd, $tail, $client) = @_; 1069: Debug("$cmd $tail $client .. $currenthostid:"); 1070: 1071: Reply( $client,\$currenthostid,"$cmd:$tail"); 1072: 1073: return 1; 1074: } 1075: &register_handler("ping", \&ping_handler, 0, 1, 1); # Ping unencoded, client or manager. 1076: 1077: #++ 1078: # 1079: # Handles pong requests. Pong replies with our current host id, and 1080: # the results of a ping sent to us via our lonc. 1081: # 1082: # Parameters: 1083: # $cmd - the actual keyword that invoked us. 1084: # $tail - the tail of the request that invoked us. 1085: # $replyfd- File descriptor connected to the client 1086: # Implicit Inputs: 1087: # $currenthostid - Global variable that carries the name of the host we are 1088: # connected to. 1089: # Returns: 1090: # 1 - Ok to continue processing. 1091: # 0 - Program should exit. 1092: # Side effects: 1093: # Reply information is sent to the client. 1094: sub pong_handler { 1095: my ($cmd, $tail, $replyfd) = @_; 1096: 1097: my $reply=&Apache::lonnet::reply("ping",$clientname); 1098: &Reply( $replyfd, "$currenthostid:$reply\n", "$cmd:$tail"); 1099: return 1; 1100: } 1101: &register_handler("pong", \&pong_handler, 0, 1, 1); # Pong unencoded, client or manager 1102: 1103: #++ 1104: # Called to establish an encrypted session key with the remote client. 1105: # Note that with secure lond, in most cases this function is never 1106: # invoked. Instead, the secure session key is established either 1107: # via a local file that's locked down tight and only lives for a short 1108: # time, or via an ssl tunnel...and is generated from a bunch-o-random 1109: # bits from /dev/urandom, rather than the predictable pattern used by 1110: # by this sub. This sub is only used in the old-style insecure 1111: # key negotiation. 1112: # Parameters: 1113: # $cmd - the actual keyword that invoked us. 1114: # $tail - the tail of the request that invoked us. 1115: # $replyfd- File descriptor connected to the client 1116: # Implicit Inputs: 1117: # $currenthostid - Global variable that carries the name of the host 1118: # known as. 1119: # $clientname - Global variable that carries the name of the host we're connected to. 1120: # Returns: 1121: # 1 - Ok to continue processing. 1122: # 0 - Program should exit. 1123: # Implicit Outputs: 1124: # Reply information is sent to the client. 1125: # $cipher is set with a reference to a new IDEA encryption object. 1126: # 1127: sub establish_key_handler { 1128: my ($cmd, $tail, $replyfd) = @_; 1129: 1130: my $buildkey=time.$$.int(rand 100000); 1131: $buildkey=~tr/1-6/A-F/; 1132: $buildkey=int(rand 100000).$buildkey.int(rand 100000); 1133: my $key=$currenthostid.$clientname; 1134: $key=~tr/a-z/A-Z/; 1135: $key=~tr/G-P/0-9/; 1136: $key=~tr/Q-Z/0-9/; 1137: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey; 1138: $key=substr($key,0,32); 1139: my $cipherkey=pack("H32",$key); 1140: $cipher=new IDEA $cipherkey; 1141: &Reply($replyfd, \$buildkey, "$cmd:$tail"); 1142: 1143: return 1; 1144: 1145: } 1146: &register_handler("ekey", \&establish_key_handler, 0, 1,1); 1147: 1148: # Handler for the load command. Returns the current system load average 1149: # to the requestor. 1150: # 1151: # Parameters: 1152: # $cmd - the actual keyword that invoked us. 1153: # $tail - the tail of the request that invoked us. 1154: # $replyfd- File descriptor connected to the client 1155: # Implicit Inputs: 1156: # $currenthostid - Global variable that carries the name of the host 1157: # known as. 1158: # $clientname - Global variable that carries the name of the host we're connected to. 1159: # Returns: 1160: # 1 - Ok to continue processing. 1161: # 0 - Program should exit. 1162: # Side effects: 1163: # Reply information is sent to the client. 1164: sub load_handler { 1165: my ($cmd, $tail, $replyfd) = @_; 1166: 1167: 1168: 1169: # Get the load average from /proc/loadavg and calculate it as a percentage of 1170: # the allowed load limit as set by the perl global variable lonLoadLim 1171: 1172: my $loadavg; 1173: my $loadfile=IO::File->new('/proc/loadavg'); 1174: 1175: $loadavg=<$loadfile>; 1176: $loadavg =~ s/\s.*//g; # Extract the first field only. 1177: 1178: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'}; 1179: 1180: &Reply( $replyfd, \$loadpercent, "$cmd:$tail"); 1181: 1182: return 1; 1183: } 1184: &register_handler("load", \&load_handler, 0, 1, 0); 1185: 1186: # 1187: # Process the userload request. This sub returns to the client the current 1188: # user load average. It can be invoked either by clients or managers. 1189: # 1190: # Parameters: 1191: # $cmd - the actual keyword that invoked us. 1192: # $tail - the tail of the request that invoked us. 1193: # $replyfd- File descriptor connected to the client 1194: # Implicit Inputs: 1195: # $currenthostid - Global variable that carries the name of the host 1196: # known as. 1197: # $clientname - Global variable that carries the name of the host we're connected to. 1198: # Returns: 1199: # 1 - Ok to continue processing. 1200: # 0 - Program should exit 1201: # Implicit inputs: 1202: # whatever the userload() function requires. 1203: # Implicit outputs: 1204: # the reply is written to the client. 1205: # 1206: sub user_load_handler { 1207: my ($cmd, $tail, $replyfd) = @_; 1208: 1209: my $userloadpercent=&Apache::lonnet::userload(); 1210: &Reply($replyfd, \$userloadpercent, "$cmd:$tail"); 1211: 1212: return 1; 1213: } 1214: &register_handler("userload", \&user_load_handler, 0, 1, 0); 1215: 1216: # Process a request for the authorization type of a user: 1217: # (userauth). 1218: # 1219: # Parameters: 1220: # $cmd - the actual keyword that invoked us. 1221: # $tail - the tail of the request that invoked us. 1222: # $replyfd- File descriptor connected to the client 1223: # Returns: 1224: # 1 - Ok to continue processing. 1225: # 0 - Program should exit 1226: # Implicit outputs: 1227: # The user authorization type is written to the client. 1228: # 1229: sub user_authorization_type { 1230: my ($cmd, $tail, $replyfd) = @_; 1231: 1232: my $userinput = "$cmd:$tail"; 1233: 1234: # Pull the domain and username out of the command tail. 1235: # and call get_auth_type to determine the authentication type. 1236: 1237: my ($udom,$uname)=split(/:/,$tail); 1238: my $result = &get_auth_type($udom, $uname); 1239: if($result eq "nouser") { 1240: &Failure( $replyfd, "unknown_user\n", $userinput); 1241: } else { 1242: # 1243: # We only want to pass the second field from get_auth_type 1244: # for ^krb.. otherwise we'll be handing out the encrypted 1245: # password for internals e.g. 1246: # 1247: my ($type,$otherinfo) = split(/:/,$result); 1248: if($type =~ /^krb/) { 1249: $type = $result; 1250: } else { 1251: $type .= ':'; 1252: } 1253: &Reply( $replyfd, \$type, $userinput); 1254: } 1255: 1256: return 1; 1257: } 1258: &register_handler("currentauth", \&user_authorization_type, 1, 1, 0); 1259: 1260: # Process a request by a manager to push a hosts or domain table 1261: # to us. We pick apart the command and pass it on to the subs 1262: # that already exist to do this. 1263: # 1264: # Parameters: 1265: # $cmd - the actual keyword that invoked us. 1266: # $tail - the tail of the request that invoked us. 1267: # $client - File descriptor connected to the client 1268: # Returns: 1269: # 1 - Ok to continue processing. 1270: # 0 - Program should exit 1271: # Implicit Output: 1272: # a reply is written to the client. 1273: sub push_file_handler { 1274: my ($cmd, $tail, $client) = @_; 1275: &Debug("In push file handler"); 1276: my $userinput = "$cmd:$tail"; 1277: 1278: # At this time we only know that the IP of our partner is a valid manager 1279: # the code below is a hook to do further authentication (e.g. to resolve 1280: # spoofing). 1281: 1282: my $cert = &GetCertificate($userinput); 1283: if(&ValidManager($cert)) { 1284: &Debug("Valid manager: $client"); 1285: 1286: # Now presumably we have the bona fides of both the peer host and the 1287: # process making the request. 1288: 1289: my $reply = &PushFile($userinput); 1290: &Reply($client, \$reply, $userinput); 1291: 1292: } else { 1293: &logthis("push_file_handler $client is not valid"); 1294: &Failure( $client, "refused\n", $userinput); 1295: } 1296: return 1; 1297: } 1298: &register_handler("pushfile", \&push_file_handler, 1, 0, 1); 1299: 1300: # The du_handler routine should be considered obsolete and is retained 1301: # for communication with legacy servers. Please see the du2_handler. 1302: # 1303: # du - list the disk usage of a directory recursively. 1304: # 1305: # note: stolen code from the ls file handler 1306: # under construction by Rick Banghart 1307: # . 1308: # Parameters: 1309: # $cmd - The command that dispatched us (du). 1310: # $ududir - The directory path to list... I'm not sure what this 1311: # is relative as things like ls:. return e.g. 1312: # no_such_dir. 1313: # $client - Socket open on the client. 1314: # Returns: 1315: # 1 - indicating that the daemon should not disconnect. 1316: # Side Effects: 1317: # The reply is written to $client. 1318: # 1319: sub du_handler { 1320: my ($cmd, $ududir, $client) = @_; 1321: ($ududir) = split(/:/,$ududir); # Make 'telnet' testing easier. 1322: my $userinput = "$cmd:$ududir"; 1323: 1324: if ($ududir=~/\.\./ || $ududir!~m|^/home/httpd/|) { 1325: &Failure($client,"refused\n","$cmd:$ududir"); 1326: return 1; 1327: } 1328: # Since $ududir could have some nasties in it, 1329: # we will require that ududir is a valid 1330: # directory. Just in case someone tries to 1331: # slip us a line like .;(cd /home/httpd rm -rf*) 1332: # etc. 1333: # 1334: if (-d $ududir) { 1335: my $total_size=0; 1336: my $code=sub { 1337: if ($_=~/\.\d+\./) { return;} 1338: if ($_=~/\.meta$/) { return;} 1339: if (-d $_) { return;} 1340: $total_size+=(stat($_))[7]; 1341: }; 1342: chdir($ududir); 1343: find($code,$ududir); 1344: $total_size=int($total_size/1024); 1345: &Reply($client,\$total_size,"$cmd:$ududir"); 1346: } else { 1347: &Failure($client, "bad_directory:$ududir\n","$cmd:$ududir"); 1348: } 1349: return 1; 1350: } 1351: &register_handler("du", \&du_handler, 0, 1, 0); 1352: 1353: # Please also see the du_handler, which is obsoleted by du2. 1354: # du2_handler differs from du_handler in that required path to directory 1355: # provided by &propath() is prepended in the handler instead of on the 1356: # client side. 1357: # 1358: # du2 - list the disk usage of a directory recursively. 1359: # 1360: # Parameters: 1361: # $cmd - The command that dispatched us (du). 1362: # $tail - The tail of the request that invoked us. 1363: # $tail is a : separated list of the following: 1364: # - $ududir - directory path to list (before prepending) 1365: # - $getpropath = 1 if &propath() should prepend 1366: # - $uname - username to use for &propath or user dir 1367: # - $udom - domain to use for &propath or user dir 1368: # All are escaped. 1369: # $client - Socket open on the client. 1370: # Returns: 1371: # 1 - indicating that the daemon should not disconnect. 1372: # Side Effects: 1373: # The reply is written to $client. 1374: # 1375: 1376: sub du2_handler { 1377: my ($cmd, $tail, $client) = @_; 1378: my ($ududir,$getpropath,$uname,$udom) = map { &unescape($_) } (split(/:/, $tail)); 1379: my $userinput = "$cmd:$tail"; 1380: if (($ududir=~/\.\./) || (($ududir!~m|^/home/httpd/|) && (!$getpropath))) { 1381: &Failure($client,"refused\n","$cmd:$tail"); 1382: return 1; 1383: } 1384: if ($getpropath) { 1385: if (($uname =~ /^$LONCAPA::match_name$/) && ($udom =~ /^$LONCAPA::match_domain$/)) { 1386: $ududir = &propath($udom,$uname).'/'.$ududir; 1387: } else { 1388: &Failure($client,"refused\n","$cmd:$tail"); 1389: return 1; 1390: } 1391: } 1392: # Since $ududir could have some nasties in it, 1393: # we will require that ududir is a valid 1394: # directory. Just in case someone tries to 1395: # slip us a line like .;(cd /home/httpd rm -rf*) 1396: # etc. 1397: # 1398: if (-d $ududir) { 1399: my $total_size=0; 1400: my $code=sub { 1401: if ($_=~/\.\d+\./) { return;} 1402: if ($_=~/\.meta$/) { return;} 1403: if (-d $_) { return;} 1404: $total_size+=(stat($_))[7]; 1405: }; 1406: chdir($ududir); 1407: find($code,$ududir); 1408: $total_size=int($total_size/1024); 1409: &Reply($client,\$total_size,"$cmd:$ududir"); 1410: } else { 1411: &Failure($client, "bad_directory:$ududir\n","$cmd:$tail"); 1412: } 1413: return 1; 1414: } 1415: &register_handler("du2", \&du2_handler, 0, 1, 0); 1416: 1417: # 1418: # The ls_handler routine should be considered obsolete and is retained 1419: # for communication with legacy servers. Please see the ls3_handler. 1420: # 1421: # ls - list the contents of a directory. For each file in the 1422: # selected directory the filename followed by the full output of 1423: # the stat function is returned. The returned info for each 1424: # file are separated by ':'. The stat fields are separated by &'s. 1425: # Parameters: 1426: # $cmd - The command that dispatched us (ls). 1427: # $ulsdir - The directory path to list... I'm not sure what this 1428: # is relative as things like ls:. return e.g. 1429: # no_such_dir. 1430: # $client - Socket open on the client. 1431: # Returns: 1432: # 1 - indicating that the daemon should not disconnect. 1433: # Side Effects: 1434: # The reply is written to $client. 1435: # 1436: sub ls_handler { 1437: # obsoleted by ls2_handler 1438: my ($cmd, $ulsdir, $client) = @_; 1439: 1440: my $userinput = "$cmd:$ulsdir"; 1441: 1442: my $obs; 1443: my $rights; 1444: my $ulsout=''; 1445: my $ulsfn; 1446: if (-e $ulsdir) { 1447: if(-d $ulsdir) { 1448: if (opendir(LSDIR,$ulsdir)) { 1449: while ($ulsfn=readdir(LSDIR)) { 1450: undef($obs); 1451: undef($rights); 1452: my @ulsstats=stat($ulsdir.'/'.$ulsfn); 1453: #We do some obsolete checking here 1454: if(-e $ulsdir.'/'.$ulsfn.".meta") { 1455: open(FILE, $ulsdir.'/'.$ulsfn.".meta"); 1456: my @obsolete=<FILE>; 1457: foreach my $obsolete (@obsolete) { 1458: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; } 1459: if($obsolete =~ m|(<copyright>)(default)|) { $rights = 1; } 1460: } 1461: } 1462: $ulsout.=$ulsfn.'&'.join('&',@ulsstats); 1463: if($obs eq '1') { $ulsout.="&1"; } 1464: else { $ulsout.="&0"; } 1465: if($rights eq '1') { $ulsout.="&1:"; } 1466: else { $ulsout.="&0:"; } 1467: } 1468: closedir(LSDIR); 1469: } 1470: } else { 1471: my @ulsstats=stat($ulsdir); 1472: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':'; 1473: } 1474: } else { 1475: $ulsout='no_such_dir'; 1476: } 1477: if ($ulsout eq '') { $ulsout='empty'; } 1478: &Reply($client, \$ulsout, $userinput); # This supports debug logging. 1479: 1480: return 1; 1481: 1482: } 1483: &register_handler("ls", \&ls_handler, 0, 1, 0); 1484: 1485: # The ls2_handler routine should be considered obsolete and is retained 1486: # for communication with legacy servers. Please see the ls3_handler. 1487: # Please also see the ls_handler, which was itself obsoleted by ls2. 1488: # ls2_handler differs from ls_handler in that it escapes its return 1489: # values before concatenating them together with ':'s. 1490: # 1491: # ls2 - list the contents of a directory. For each file in the 1492: # selected directory the filename followed by the full output of 1493: # the stat function is returned. The returned info for each 1494: # file are separated by ':'. The stat fields are separated by &'s. 1495: # Parameters: 1496: # $cmd - The command that dispatched us (ls). 1497: # $ulsdir - The directory path to list... I'm not sure what this 1498: # is relative as things like ls:. return e.g. 1499: # no_such_dir. 1500: # $client - Socket open on the client. 1501: # Returns: 1502: # 1 - indicating that the daemon should not disconnect. 1503: # Side Effects: 1504: # The reply is written to $client. 1505: # 1506: sub ls2_handler { 1507: my ($cmd, $ulsdir, $client) = @_; 1508: 1509: my $userinput = "$cmd:$ulsdir"; 1510: 1511: my $obs; 1512: my $rights; 1513: my $ulsout=''; 1514: my $ulsfn; 1515: if (-e $ulsdir) { 1516: if(-d $ulsdir) { 1517: if (opendir(LSDIR,$ulsdir)) { 1518: while ($ulsfn=readdir(LSDIR)) { 1519: undef($obs); 1520: undef($rights); 1521: my @ulsstats=stat($ulsdir.'/'.$ulsfn); 1522: #We do some obsolete checking here 1523: if(-e $ulsdir.'/'.$ulsfn.".meta") { 1524: open(FILE, $ulsdir.'/'.$ulsfn.".meta"); 1525: my @obsolete=<FILE>; 1526: foreach my $obsolete (@obsolete) { 1527: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; } 1528: if($obsolete =~ m|(<copyright>)(default)|) { 1529: $rights = 1; 1530: } 1531: } 1532: } 1533: my $tmp = $ulsfn.'&'.join('&',@ulsstats); 1534: if ($obs eq '1') { $tmp.="&1"; } else { $tmp.="&0"; } 1535: if ($rights eq '1') { $tmp.="&1"; } else { $tmp.="&0"; } 1536: $ulsout.= &escape($tmp).':'; 1537: } 1538: closedir(LSDIR); 1539: } 1540: } else { 1541: my @ulsstats=stat($ulsdir); 1542: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':'; 1543: } 1544: } else { 1545: $ulsout='no_such_dir'; 1546: } 1547: if ($ulsout eq '') { $ulsout='empty'; } 1548: &Reply($client, \$ulsout, $userinput); # This supports debug logging. 1549: return 1; 1550: } 1551: &register_handler("ls2", \&ls2_handler, 0, 1, 0); 1552: # 1553: # ls3 - list the contents of a directory. For each file in the 1554: # selected directory the filename followed by the full output of 1555: # the stat function is returned. The returned info for each 1556: # file are separated by ':'. The stat fields are separated by &'s. 1557: # Parameters: 1558: # $cmd - The command that dispatched us (ls). 1559: # $tail - The tail of the request that invoked us. 1560: # $tail is a : separated list of the following: 1561: # - $ulsdir - directory path to list (before prepending) 1562: # - $getpropath = 1 if &propath() should prepend 1563: # - $getuserdir = 1 if path to user dir in lonUsers should 1564: # prepend 1565: # - $alternate_root - path to prepend 1566: # - $uname - username to use for &propath or user dir 1567: # - $udom - domain to use for &propath or user dir 1568: # All of these except $getpropath and &getuserdir are escaped. 1569: # no_such_dir. 1570: # $client - Socket open on the client. 1571: # Returns: 1572: # 1 - indicating that the daemon should not disconnect. 1573: # Side Effects: 1574: # The reply is written to $client. 1575: # 1576: 1577: sub ls3_handler { 1578: my ($cmd, $tail, $client) = @_; 1579: my $userinput = "$cmd:$tail"; 1580: my ($ulsdir,$getpropath,$getuserdir,$alternate_root,$uname,$udom) = 1581: split(/:/,$tail); 1582: if (defined($ulsdir)) { 1583: $ulsdir = &unescape($ulsdir); 1584: } 1585: if (defined($alternate_root)) { 1586: $alternate_root = &unescape($alternate_root); 1587: } 1588: if (defined($uname)) { 1589: $uname = &unescape($uname); 1590: } 1591: if (defined($udom)) { 1592: $udom = &unescape($udom); 1593: } 1594: 1595: my $dir_root = $perlvar{'lonDocRoot'}; 1596: if ($getpropath) { 1597: if (($uname =~ /^$LONCAPA::match_name$/) && ($udom =~ /^$LONCAPA::match_domain$/)) { 1598: $dir_root = &propath($udom,$uname); 1599: $dir_root =~ s/\/$//; 1600: } else { 1601: &Failure($client,"refused\n","$cmd:$tail"); 1602: return 1; 1603: } 1604: } elsif ($getuserdir) { 1605: if (($uname =~ /^$LONCAPA::match_name$/) && ($udom =~ /^$LONCAPA::match_domain$/)) { 1606: my $subdir=$uname.'__'; 1607: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/; 1608: $dir_root = $Apache::lonnet::perlvar{'lonUsersDir'} 1609: ."/$udom/$subdir/$uname"; 1610: } else { 1611: &Failure($client,"refused\n","$cmd:$tail"); 1612: return 1; 1613: } 1614: } elsif ($alternate_root ne '') { 1615: $dir_root = $alternate_root; 1616: } 1617: if (($dir_root ne '') && ($dir_root ne '/')) { 1618: if ($ulsdir =~ /^\//) { 1619: $ulsdir = $dir_root.$ulsdir; 1620: } else { 1621: $ulsdir = $dir_root.'/'.$ulsdir; 1622: } 1623: } 1624: my $obs; 1625: my $rights; 1626: my $ulsout=''; 1627: my $ulsfn; 1628: if (-e $ulsdir) { 1629: if(-d $ulsdir) { 1630: if (opendir(LSDIR,$ulsdir)) { 1631: while ($ulsfn=readdir(LSDIR)) { 1632: undef($obs); 1633: undef($rights); 1634: my @ulsstats=stat($ulsdir.'/'.$ulsfn); 1635: #We do some obsolete checking here 1636: if(-e $ulsdir.'/'.$ulsfn.".meta") { 1637: open(FILE, $ulsdir.'/'.$ulsfn.".meta"); 1638: my @obsolete=<FILE>; 1639: foreach my $obsolete (@obsolete) { 1640: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; } 1641: if($obsolete =~ m|(<copyright>)(default)|) { 1642: $rights = 1; 1643: } 1644: } 1645: } 1646: my $tmp = $ulsfn.'&'.join('&',@ulsstats); 1647: if ($obs eq '1') { $tmp.="&1"; } else { $tmp.="&0"; } 1648: if ($rights eq '1') { $tmp.="&1"; } else { $tmp.="&0"; } 1649: $ulsout.= &escape($tmp).':'; 1650: } 1651: closedir(LSDIR); 1652: } 1653: } else { 1654: my @ulsstats=stat($ulsdir); 1655: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':'; 1656: } 1657: } else { 1658: $ulsout='no_such_dir'; 1659: } 1660: if ($ulsout eq '') { $ulsout='empty'; } 1661: &Reply($client, \$ulsout, $userinput); # This supports debug logging. 1662: return 1; 1663: } 1664: &register_handler("ls3", \&ls3_handler, 0, 1, 0); 1665: 1666: sub server_timezone_handler { 1667: my ($cmd,$tail,$client) = @_; 1668: my $userinput = "$cmd:$tail"; 1669: my $timezone; 1670: my $clockfile = '/etc/sysconfig/clock'; # Fedora/CentOS/SuSE 1671: my $tzfile = '/etc/timezone'; # Debian/Ubuntu 1672: if (-e $clockfile) { 1673: if (open(my $fh,"<$clockfile")) { 1674: while (<$fh>) { 1675: next if (/^[\#\s]/); 1676: if (/^(?:TIME)?ZONE\s*=\s*['"]?\s*([\w\/]+)/) { 1677: $timezone = $1; 1678: last; 1679: } 1680: } 1681: close($fh); 1682: } 1683: } elsif (-e $tzfile) { 1684: if (open(my $fh,"<$tzfile")) { 1685: $timezone = <$fh>; 1686: close($fh); 1687: chomp($timezone); 1688: if ($timezone =~ m{^Etc/(\w+)$}) { 1689: $timezone = $1; 1690: } 1691: } 1692: } 1693: &Reply($client,\$timezone,$userinput); # This supports debug logging. 1694: return 1; 1695: } 1696: &register_handler("servertimezone", \&server_timezone_handler, 0, 1, 0); 1697: 1698: sub server_loncaparev_handler { 1699: my ($cmd,$tail,$client) = @_; 1700: my $userinput = "$cmd:$tail"; 1701: &Reply($client,\$perlvar{'lonVersion'},$userinput); 1702: return 1; 1703: } 1704: &register_handler("serverloncaparev", \&server_loncaparev_handler, 0, 1, 0); 1705: 1706: sub server_homeID_handler { 1707: my ($cmd,$tail,$client) = @_; 1708: my $userinput = "$cmd:$tail"; 1709: &Reply($client,\$perlvar{'lonHostID'},$userinput); 1710: return 1; 1711: } 1712: &register_handler("serverhomeID", \&server_homeID_handler, 0, 1, 0); 1713: 1714: sub server_distarch_handler { 1715: my ($cmd,$tail,$client) = @_; 1716: my $userinput = "$cmd:$tail"; 1717: my $reply = &distro_and_arch(); 1718: &Reply($client,\$reply,$userinput); 1719: return 1; 1720: } 1721: &register_handler("serverdistarch", \&server_distarch_handler, 0, 1, 0); 1722: 1723: # Process a reinit request. Reinit requests that either 1724: # lonc or lond be reinitialized so that an updated 1725: # host.tab or domain.tab can be processed. 1726: # 1727: # Parameters: 1728: # $cmd - the actual keyword that invoked us. 1729: # $tail - the tail of the request that invoked us. 1730: # $client - File descriptor connected to the client 1731: # Returns: 1732: # 1 - Ok to continue processing. 1733: # 0 - Program should exit 1734: # Implicit output: 1735: # a reply is sent to the client. 1736: # 1737: sub reinit_process_handler { 1738: my ($cmd, $tail, $client) = @_; 1739: 1740: my $userinput = "$cmd:$tail"; 1741: 1742: my $cert = &GetCertificate($userinput); 1743: if(&ValidManager($cert)) { 1744: chomp($userinput); 1745: my $reply = &ReinitProcess($userinput); 1746: &Reply( $client, \$reply, $userinput); 1747: } else { 1748: &Failure( $client, "refused\n", $userinput); 1749: } 1750: return 1; 1751: } 1752: &register_handler("reinit", \&reinit_process_handler, 1, 0, 1); 1753: 1754: # Process the editing script for a table edit operation. 1755: # the editing operation must be encrypted and requested by 1756: # a manager host. 1757: # 1758: # Parameters: 1759: # $cmd - the actual keyword that invoked us. 1760: # $tail - the tail of the request that invoked us. 1761: # $client - File descriptor connected to the client 1762: # Returns: 1763: # 1 - Ok to continue processing. 1764: # 0 - Program should exit 1765: # Implicit output: 1766: # a reply is sent to the client. 1767: # 1768: sub edit_table_handler { 1769: my ($command, $tail, $client) = @_; 1770: 1771: my $userinput = "$command:$tail"; 1772: 1773: my $cert = &GetCertificate($userinput); 1774: if(&ValidManager($cert)) { 1775: my($filetype, $script) = split(/:/, $tail); 1776: if (($filetype eq "hosts") || 1777: ($filetype eq "domain")) { 1778: if($script ne "") { 1779: &Reply($client, # BUGBUG - EditFile 1780: &EditFile($userinput), # could fail. 1781: $userinput); 1782: } else { 1783: &Failure($client,"refused\n",$userinput); 1784: } 1785: } else { 1786: &Failure($client,"refused\n",$userinput); 1787: } 1788: } else { 1789: &Failure($client,"refused\n",$userinput); 1790: } 1791: return 1; 1792: } 1793: &register_handler("edit", \&edit_table_handler, 1, 0, 1); 1794: 1795: # 1796: # Authenticate a user against the LonCAPA authentication 1797: # database. Note that there are several authentication 1798: # possibilities: 1799: # - unix - The user can be authenticated against the unix 1800: # password file. 1801: # - internal - The user can be authenticated against a purely 1802: # internal per user password file. 1803: # - kerberos - The user can be authenticated against either a kerb4 or kerb5 1804: # ticket granting authority. 1805: # - user - The person tailoring LonCAPA can supply a user authentication 1806: # mechanism that is per system. 1807: # 1808: # Parameters: 1809: # $cmd - The command that got us here. 1810: # $tail - Tail of the command (remaining parameters). 1811: # $client - File descriptor connected to client. 1812: # Returns 1813: # 0 - Requested to exit, caller should shut down. 1814: # 1 - Continue processing. 1815: # Implicit inputs: 1816: # The authentication systems describe above have their own forms of implicit 1817: # input into the authentication process that are described above. 1818: # 1819: sub authenticate_handler { 1820: my ($cmd, $tail, $client) = @_; 1821: 1822: 1823: # Regenerate the full input line 1824: 1825: my $userinput = $cmd.":".$tail; 1826: 1827: # udom - User's domain. 1828: # uname - Username. 1829: # upass - User's password. 1830: # checkdefauth - Pass to validate_user() to try authentication 1831: # with default auth type(s) if no user account. 1832: # clientcancheckhost - Passed by clients with functionality in lonauth.pm 1833: # to check if session can be hosted. 1834: 1835: my ($udom, $uname, $upass, $checkdefauth, $clientcancheckhost)=split(/:/,$tail); 1836: &Debug(" Authenticate domain = $udom, user = $uname, password = $upass, checkdefauth = $checkdefauth"); 1837: chomp($upass); 1838: $upass=&unescape($upass); 1839: 1840: my $pwdcorrect = &validate_user($udom,$uname,$upass,$checkdefauth); 1841: if($pwdcorrect) { 1842: my $canhost = 1; 1843: unless ($clientcancheckhost) { 1844: my $uprimary_id = &Apache::lonnet::domain($udom,'primary'); 1845: my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id); 1846: my @intdoms; 1847: my $internet_names = &Apache::lonnet::get_internet_names($clientname); 1848: if (ref($internet_names) eq 'ARRAY') { 1849: @intdoms = @{$internet_names}; 1850: } 1851: unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) { 1852: my ($remote,$hosted); 1853: my $remotesession = &get_usersession_config($udom,'remotesession'); 1854: if (ref($remotesession) eq 'HASH') { 1855: $remote = $remotesession->{'remote'} 1856: } 1857: my $hostedsession = &get_usersession_config($clienthomedom,'hostedsession'); 1858: if (ref($hostedsession) eq 'HASH') { 1859: $hosted = $hostedsession->{'hosted'}; 1860: } 1861: my $loncaparev = $clientversion; 1862: if ($loncaparev eq '') { 1863: $loncaparev = $Apache::lonnet::loncaparevs{$clientname}; 1864: } 1865: $canhost = &Apache::lonnet::can_host_session($udom,$clientname, 1866: $loncaparev, 1867: $remote,$hosted); 1868: } 1869: } 1870: if ($canhost) { 1871: &Reply( $client, "authorized\n", $userinput); 1872: } else { 1873: &Reply( $client, "not_allowed_to_host\n", $userinput); 1874: } 1875: # 1876: # Bad credentials: Failed to authorize 1877: # 1878: } else { 1879: &Failure( $client, "non_authorized\n", $userinput); 1880: } 1881: 1882: return 1; 1883: } 1884: &register_handler("auth", \&authenticate_handler, 1, 1, 0); 1885: 1886: # 1887: # Change a user's password. Note that this function is complicated by 1888: # the fact that a user may be authenticated in more than one way: 1889: # At present, we are not able to change the password for all types of 1890: # authentication methods. Only for: 1891: # unix - unix password or shadow passoword style authentication. 1892: # local - Locally written authentication mechanism. 1893: # For now, kerb4 and kerb5 password changes are not supported and result 1894: # in an error. 1895: # FUTURE WORK: 1896: # Support kerberos passwd changes? 1897: # Parameters: 1898: # $cmd - The command that got us here. 1899: # $tail - Tail of the command (remaining parameters). 1900: # $client - File descriptor connected to client. 1901: # Returns 1902: # 0 - Requested to exit, caller should shut down. 1903: # 1 - Continue processing. 1904: # Implicit inputs: 1905: # The authentication systems describe above have their own forms of implicit 1906: # input into the authentication process that are described above. 1907: sub change_password_handler { 1908: my ($cmd, $tail, $client) = @_; 1909: 1910: my $userinput = $cmd.":".$tail; # Reconstruct client's string. 1911: 1912: # 1913: # udom - user's domain. 1914: # uname - Username. 1915: # upass - Current password. 1916: # npass - New password. 1917: # context - Context in which this was called 1918: # (preferences or reset_by_email). 1919: # lonhost - HostID of server where request originated 1920: 1921: my ($udom,$uname,$upass,$npass,$context,$lonhost)=split(/:/,$tail); 1922: 1923: $upass=&unescape($upass); 1924: $npass=&unescape($npass); 1925: &Debug("Trying to change password for $uname"); 1926: 1927: # First require that the user can be authenticated with their 1928: # old password unless context was 'reset_by_email': 1929: 1930: my ($validated,$failure); 1931: if ($context eq 'reset_by_email') { 1932: if ($lonhost eq '') { 1933: $failure = 'invalid_client'; 1934: } else { 1935: $validated = 1; 1936: } 1937: } else { 1938: $validated = &validate_user($udom, $uname, $upass); 1939: } 1940: if($validated) { 1941: my $realpasswd = &get_auth_type($udom, $uname); # Defined since authd. 1942: 1943: my ($howpwd,$contentpwd)=split(/:/,$realpasswd); 1944: if ($howpwd eq 'internal') { 1945: &Debug("internal auth"); 1946: my $salt=time; 1947: $salt=substr($salt,6,2); 1948: my $ncpass=crypt($npass,$salt); 1949: if(&rewrite_password_file($udom, $uname, "internal:$ncpass")) { 1950: my $msg="Result of password change for $uname: pwchange_success"; 1951: if ($lonhost) { 1952: $msg .= " - request originated from: $lonhost"; 1953: } 1954: &logthis($msg); 1955: &Reply($client, "ok\n", $userinput); 1956: } else { 1957: &logthis("Unable to open $uname passwd " 1958: ."to change password"); 1959: &Failure( $client, "non_authorized\n",$userinput); 1960: } 1961: } elsif ($howpwd eq 'unix' && $context ne 'reset_by_email') { 1962: my $result = &change_unix_password($uname, $npass); 1963: &logthis("Result of password change for $uname: ". 1964: $result); 1965: &Reply($client, \$result, $userinput); 1966: } else { 1967: # this just means that the current password mode is not 1968: # one we know how to change (e.g the kerberos auth modes or 1969: # locally written auth handler). 1970: # 1971: &Failure( $client, "auth_mode_error\n", $userinput); 1972: } 1973: 1974: } else { 1975: if ($failure eq '') { 1976: $failure = 'non_authorized'; 1977: } 1978: &Failure( $client, "$failure\n", $userinput); 1979: } 1980: 1981: return 1; 1982: } 1983: &register_handler("passwd", \&change_password_handler, 1, 1, 0); 1984: 1985: # 1986: # Create a new user. User in this case means a lon-capa user. 1987: # The user must either already exist in some authentication realm 1988: # like kerberos or the /etc/passwd. If not, a user completely local to 1989: # this loncapa system is created. 1990: # 1991: # Parameters: 1992: # $cmd - The command that got us here. 1993: # $tail - Tail of the command (remaining parameters). 1994: # $client - File descriptor connected to client. 1995: # Returns 1996: # 0 - Requested to exit, caller should shut down. 1997: # 1 - Continue processing. 1998: # Implicit inputs: 1999: # The authentication systems describe above have their own forms of implicit 2000: # input into the authentication process that are described above. 2001: sub add_user_handler { 2002: 2003: my ($cmd, $tail, $client) = @_; 2004: 2005: 2006: my ($udom,$uname,$umode,$npass)=split(/:/,$tail); 2007: my $userinput = $cmd.":".$tail; # Reconstruct the full request line. 2008: 2009: &Debug("cmd =".$cmd." $udom =".$udom." uname=".$uname); 2010: 2011: 2012: if($udom eq $currentdomainid) { # Reject new users for other domains... 2013: 2014: my $oldumask=umask(0077); 2015: chomp($npass); 2016: $npass=&unescape($npass); 2017: my $passfilename = &password_path($udom, $uname); 2018: &Debug("Password file created will be:".$passfilename); 2019: if (-e $passfilename) { 2020: &Failure( $client, "already_exists\n", $userinput); 2021: } else { 2022: my $fperror=''; 2023: if (!&mkpath($passfilename)) { 2024: $fperror="error: ".($!+0)." mkdir failed while attempting " 2025: ."makeuser"; 2026: } 2027: unless ($fperror) { 2028: my $result=&make_passwd_file($uname, $umode,$npass, $passfilename); 2029: &Reply($client,\$result, $userinput); #BUGBUG - could be fail 2030: } else { 2031: &Failure($client, \$fperror, $userinput); 2032: } 2033: } 2034: umask($oldumask); 2035: } else { 2036: &Failure($client, "not_right_domain\n", 2037: $userinput); # Even if we are multihomed. 2038: 2039: } 2040: return 1; 2041: 2042: } 2043: &register_handler("makeuser", \&add_user_handler, 1, 1, 0); 2044: 2045: # 2046: # Change the authentication method of a user. Note that this may 2047: # also implicitly change the user's password if, for example, the user is 2048: # joining an existing authentication realm. Known authentication realms at 2049: # this time are: 2050: # internal - Purely internal password file (only loncapa knows this user) 2051: # local - Institutionally written authentication module. 2052: # unix - Unix user (/etc/passwd with or without /etc/shadow). 2053: # kerb4 - kerberos version 4 2054: # kerb5 - kerberos version 5 2055: # 2056: # Parameters: 2057: # $cmd - The command that got us here. 2058: # $tail - Tail of the command (remaining parameters). 2059: # $client - File descriptor connected to client. 2060: # Returns 2061: # 0 - Requested to exit, caller should shut down. 2062: # 1 - Continue processing. 2063: # Implicit inputs: 2064: # The authentication systems describe above have their own forms of implicit 2065: # input into the authentication process that are described above. 2066: # NOTE: 2067: # This is also used to change the authentication credential values (e.g. passwd). 2068: # 2069: # 2070: sub change_authentication_handler { 2071: 2072: my ($cmd, $tail, $client) = @_; 2073: 2074: my $userinput = "$cmd:$tail"; # Reconstruct user input. 2075: 2076: my ($udom,$uname,$umode,$npass)=split(/:/,$tail); 2077: &Debug("cmd = ".$cmd." domain= ".$udom."uname =".$uname." umode= ".$umode); 2078: if ($udom ne $currentdomainid) { 2079: &Failure( $client, "not_right_domain\n", $client); 2080: } else { 2081: 2082: chomp($npass); 2083: 2084: $npass=&unescape($npass); 2085: my $oldauth = &get_auth_type($udom, $uname); # Get old auth info. 2086: my $passfilename = &password_path($udom, $uname); 2087: if ($passfilename) { # Not allowed to create a new user!! 2088: # If just changing the unix passwd. need to arrange to run 2089: # passwd since otherwise make_passwd_file will run 2090: # lcuseradd which fails if an account already exists 2091: # (to prevent an unscrupulous LONCAPA admin from stealing 2092: # an existing account by overwriting it as a LonCAPA account). 2093: 2094: if(($oldauth =~/^unix/) && ($umode eq "unix")) { 2095: my $result = &change_unix_password($uname, $npass); 2096: &logthis("Result of password change for $uname: ".$result); 2097: if ($result eq "ok") { 2098: &Reply($client, \$result); 2099: } else { 2100: &Failure($client, \$result); 2101: } 2102: } else { 2103: my $result=&make_passwd_file($uname, $umode,$npass,$passfilename); 2104: # 2105: # If the current auth mode is internal, and the old auth mode was 2106: # unix, or krb*, and the user is an author for this domain, 2107: # re-run manage_permissions for that role in order to be able 2108: # to take ownership of the construction space back to www:www 2109: # 2110: 2111: 2112: if( (($oldauth =~ /^unix/) && ($umode eq "internal")) || 2113: (($oldauth =~ /^internal/) && ($umode eq "unix")) ) { 2114: if(&is_author($udom, $uname)) { 2115: &Debug(" Need to manage author permissions..."); 2116: &manage_permissions("/$udom/_au", $udom, $uname, "$umode:"); 2117: } 2118: } 2119: &Reply($client, \$result, $userinput); 2120: } 2121: 2122: 2123: } else { 2124: &Failure($client, "non_authorized\n", $userinput); # Fail the user now. 2125: } 2126: } 2127: return 1; 2128: } 2129: &register_handler("changeuserauth", \&change_authentication_handler, 1,1, 0); 2130: 2131: # 2132: # Determines if this is the home server for a user. The home server 2133: # for a user will have his/her lon-capa passwd file. Therefore all we need 2134: # to do is determine if this file exists. 2135: # 2136: # Parameters: 2137: # $cmd - The command that got us here. 2138: # $tail - Tail of the command (remaining parameters). 2139: # $client - File descriptor connected to client. 2140: # Returns 2141: # 0 - Requested to exit, caller should shut down. 2142: # 1 - Continue processing. 2143: # Implicit inputs: 2144: # The authentication systems describe above have their own forms of implicit 2145: # input into the authentication process that are described above. 2146: # 2147: sub is_home_handler { 2148: my ($cmd, $tail, $client) = @_; 2149: 2150: my $userinput = "$cmd:$tail"; 2151: 2152: my ($udom,$uname)=split(/:/,$tail); 2153: chomp($uname); 2154: my $passfile = &password_filename($udom, $uname); 2155: if($passfile) { 2156: &Reply( $client, "found\n", $userinput); 2157: } else { 2158: &Failure($client, "not_found\n", $userinput); 2159: } 2160: return 1; 2161: } 2162: &register_handler("home", \&is_home_handler, 0,1,0); 2163: 2164: # 2165: # Process an update request for a resource. 2166: # A resource has been modified that we hold a subscription to. 2167: # If the resource is not local, then we must update, or at least invalidate our 2168: # cached copy of the resource. 2169: # Parameters: 2170: # $cmd - The command that got us here. 2171: # $tail - Tail of the command (remaining parameters). 2172: # $client - File descriptor connected to client. 2173: # Returns 2174: # 0 - Requested to exit, caller should shut down. 2175: # 1 - Continue processing. 2176: # Implicit inputs: 2177: # The authentication systems describe above have their own forms of implicit 2178: # input into the authentication process that are described above. 2179: # 2180: sub update_resource_handler { 2181: 2182: my ($cmd, $tail, $client) = @_; 2183: 2184: my $userinput = "$cmd:$tail"; 2185: 2186: my $fname= $tail; # This allows interactive testing 2187: 2188: 2189: my $ownership=ishome($fname); 2190: if ($ownership eq 'not_owner') { 2191: if (-e $fname) { 2192: # Delete preview file, if exists 2193: unlink("$fname.tmp"); 2194: # Get usage stats 2195: my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size, 2196: $atime,$mtime,$ctime,$blksize,$blocks)=stat($fname); 2197: my $now=time; 2198: my $since=$now-$atime; 2199: # If the file has not been used within lonExpire seconds, 2200: # unsubscribe from it and delete local copy 2201: if ($since>$perlvar{'lonExpire'}) { 2202: my $reply=&Apache::lonnet::reply("unsub:$fname","$clientname"); 2203: &devalidate_meta_cache($fname); 2204: unlink("$fname"); 2205: unlink("$fname.meta"); 2206: } else { 2207: # Yes, this is in active use. Get a fresh copy. Since it might be in 2208: # very active use and huge (like a movie), copy it to "in.transfer" filename first. 2209: my $transname="$fname.in.transfer"; 2210: my $remoteurl=&Apache::lonnet::reply("sub:$fname","$clientname"); 2211: my $response; 2212: # FIXME: cannot replicate files that take more than two minutes to transfer? 2213: # alarm(120); 2214: # FIXME: this should use the LWP mechanism, not internal alarms. 2215: alarm(1200); 2216: { 2217: my $ua=new LWP::UserAgent; 2218: my $request=new HTTP::Request('GET',"$remoteurl"); 2219: $response=$ua->request($request,$transname); 2220: } 2221: alarm(0); 2222: if ($response->is_error()) { 2223: # FIXME: we should probably clean up here instead of just whine 2224: unlink($transname); 2225: my $message=$response->status_line; 2226: &logthis("LWP GET: $message for $fname ($remoteurl)"); 2227: } else { 2228: if ($remoteurl!~/\.meta$/) { 2229: # FIXME: isn't there an internal LWP mechanism for this? 2230: alarm(120); 2231: { 2232: my $ua=new LWP::UserAgent; 2233: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta'); 2234: my $mresponse=$ua->request($mrequest,$fname.'.meta'); 2235: if ($mresponse->is_error()) { 2236: unlink($fname.'.meta'); 2237: } 2238: } 2239: alarm(0); 2240: } 2241: # we successfully transfered, copy file over to real name 2242: rename($transname,$fname); 2243: &devalidate_meta_cache($fname); 2244: } 2245: } 2246: &Reply( $client, "ok\n", $userinput); 2247: } else { 2248: &Failure($client, "not_found\n", $userinput); 2249: } 2250: } else { 2251: &Failure($client, "rejected\n", $userinput); 2252: } 2253: return 1; 2254: } 2255: &register_handler("update", \&update_resource_handler, 0 ,1, 0); 2256: 2257: sub devalidate_meta_cache { 2258: my ($url) = @_; 2259: use Cache::Memcached; 2260: my $memcache = new Cache::Memcached({'servers'=>['127.0.0.1:11211']}); 2261: $url = &Apache::lonnet::declutter($url); 2262: $url =~ s-\.meta$--; 2263: my $id = &escape('meta:'.$url); 2264: $memcache->delete($id); 2265: } 2266: 2267: # 2268: # Fetch a user file from a remote server to the user's home directory 2269: # userfiles subdir. 2270: # Parameters: 2271: # $cmd - The command that got us here. 2272: # $tail - Tail of the command (remaining parameters). 2273: # $client - File descriptor connected to client. 2274: # Returns 2275: # 0 - Requested to exit, caller should shut down. 2276: # 1 - Continue processing. 2277: # 2278: sub fetch_user_file_handler { 2279: 2280: my ($cmd, $tail, $client) = @_; 2281: 2282: my $userinput = "$cmd:$tail"; 2283: my $fname = $tail; 2284: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|); 2285: my $udir=&propath($udom,$uname).'/userfiles'; 2286: unless (-e $udir) { 2287: mkdir($udir,0770); 2288: } 2289: Debug("fetch user file for $fname"); 2290: if (-e $udir) { 2291: $ufile=~s/^[\.\~]+//; 2292: 2293: # IF necessary, create the path right down to the file. 2294: # Note that any regular files in the way of this path are 2295: # wiped out to deal with some earlier folly of mine. 2296: 2297: if (!&mkpath($udir.'/'.$ufile)) { 2298: &Failure($client, "unable_to_create\n", $userinput); 2299: } 2300: 2301: my $destname=$udir.'/'.$ufile; 2302: my $transname=$udir.'/'.$ufile.'.in.transit'; 2303: my $remoteurl='http://'.$clientip.'/userfiles/'.$fname; 2304: my $response; 2305: Debug("Remote URL : $remoteurl Transfername $transname Destname: $destname"); 2306: alarm(120); 2307: { 2308: my $ua=new LWP::UserAgent; 2309: my $request=new HTTP::Request('GET',"$remoteurl"); 2310: $response=$ua->request($request,$transname); 2311: } 2312: alarm(0); 2313: if ($response->is_error()) { 2314: unlink($transname); 2315: my $message=$response->status_line; 2316: &logthis("LWP GET: $message for $fname ($remoteurl)"); 2317: &Failure($client, "failed\n", $userinput); 2318: } else { 2319: Debug("Renaming $transname to $destname"); 2320: if (!rename($transname,$destname)) { 2321: &logthis("Unable to move $transname to $destname"); 2322: unlink($transname); 2323: &Failure($client, "failed\n", $userinput); 2324: } else { 2325: &Reply($client, "ok\n", $userinput); 2326: } 2327: } 2328: } else { 2329: &Failure($client, "not_home\n", $userinput); 2330: } 2331: return 1; 2332: } 2333: &register_handler("fetchuserfile", \&fetch_user_file_handler, 0, 1, 0); 2334: 2335: # 2336: # Remove a file from a user's home directory userfiles subdirectory. 2337: # Parameters: 2338: # cmd - the Lond request keyword that got us here. 2339: # tail - the part of the command past the keyword. 2340: # client- File descriptor connected with the client. 2341: # 2342: # Returns: 2343: # 1 - Continue processing. 2344: sub remove_user_file_handler { 2345: my ($cmd, $tail, $client) = @_; 2346: 2347: my ($fname) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent. 2348: 2349: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|); 2350: if ($ufile =~m|/\.\./|) { 2351: # any files paths with /../ in them refuse 2352: # to deal with 2353: &Failure($client, "refused\n", "$cmd:$tail"); 2354: } else { 2355: my $udir = &propath($udom,$uname); 2356: if (-e $udir) { 2357: my $file=$udir.'/userfiles/'.$ufile; 2358: if (-e $file) { 2359: # 2360: # If the file is a regular file unlink is fine... 2361: # However it's possible the client wants a dir. 2362: # removed, in which case rmdir is more approprate: 2363: # 2364: if (-f $file){ 2365: unlink($file); 2366: } elsif(-d $file) { 2367: rmdir($file); 2368: } 2369: if (-e $file) { 2370: # File is still there after we deleted it ?!? 2371: 2372: &Failure($client, "failed\n", "$cmd:$tail"); 2373: } else { 2374: &Reply($client, "ok\n", "$cmd:$tail"); 2375: } 2376: } else { 2377: &Failure($client, "not_found\n", "$cmd:$tail"); 2378: } 2379: } else { 2380: &Failure($client, "not_home\n", "$cmd:$tail"); 2381: } 2382: } 2383: return 1; 2384: } 2385: &register_handler("removeuserfile", \&remove_user_file_handler, 0,1,0); 2386: 2387: # 2388: # make a directory in a user's home directory userfiles subdirectory. 2389: # Parameters: 2390: # cmd - the Lond request keyword that got us here. 2391: # tail - the part of the command past the keyword. 2392: # client- File descriptor connected with the client. 2393: # 2394: # Returns: 2395: # 1 - Continue processing. 2396: sub mkdir_user_file_handler { 2397: my ($cmd, $tail, $client) = @_; 2398: 2399: my ($dir) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent. 2400: $dir=&unescape($dir); 2401: my ($udom,$uname,$ufile) = ($dir =~ m|^([^/]+)/([^/]+)/(.+)$|); 2402: if ($ufile =~m|/\.\./|) { 2403: # any files paths with /../ in them refuse 2404: # to deal with 2405: &Failure($client, "refused\n", "$cmd:$tail"); 2406: } else { 2407: my $udir = &propath($udom,$uname); 2408: if (-e $udir) { 2409: my $newdir=$udir.'/userfiles/'.$ufile.'/'; 2410: if (!&mkpath($newdir)) { 2411: &Failure($client, "failed\n", "$cmd:$tail"); 2412: } 2413: &Reply($client, "ok\n", "$cmd:$tail"); 2414: } else { 2415: &Failure($client, "not_home\n", "$cmd:$tail"); 2416: } 2417: } 2418: return 1; 2419: } 2420: &register_handler("mkdiruserfile", \&mkdir_user_file_handler, 0,1,0); 2421: 2422: # 2423: # rename a file in a user's home directory userfiles subdirectory. 2424: # Parameters: 2425: # cmd - the Lond request keyword that got us here. 2426: # tail - the part of the command past the keyword. 2427: # client- File descriptor connected with the client. 2428: # 2429: # Returns: 2430: # 1 - Continue processing. 2431: sub rename_user_file_handler { 2432: my ($cmd, $tail, $client) = @_; 2433: 2434: my ($udom,$uname,$old,$new) = split(/:/, $tail); 2435: $old=&unescape($old); 2436: $new=&unescape($new); 2437: if ($new =~m|/\.\./| || $old =~m|/\.\./|) { 2438: # any files paths with /../ in them refuse to deal with 2439: &Failure($client, "refused\n", "$cmd:$tail"); 2440: } else { 2441: my $udir = &propath($udom,$uname); 2442: if (-e $udir) { 2443: my $oldfile=$udir.'/userfiles/'.$old; 2444: my $newfile=$udir.'/userfiles/'.$new; 2445: if (-e $newfile) { 2446: &Failure($client, "exists\n", "$cmd:$tail"); 2447: } elsif (! -e $oldfile) { 2448: &Failure($client, "not_found\n", "$cmd:$tail"); 2449: } else { 2450: if (!rename($oldfile,$newfile)) { 2451: &Failure($client, "failed\n", "$cmd:$tail"); 2452: } else { 2453: &Reply($client, "ok\n", "$cmd:$tail"); 2454: } 2455: } 2456: } else { 2457: &Failure($client, "not_home\n", "$cmd:$tail"); 2458: } 2459: } 2460: return 1; 2461: } 2462: &register_handler("renameuserfile", \&rename_user_file_handler, 0,1,0); 2463: 2464: # 2465: # Checks if the specified user has an active session on the server 2466: # return ok if so, not_found if not 2467: # 2468: # Parameters: 2469: # cmd - The request keyword that dispatched to tus. 2470: # tail - The tail of the request (colon separated parameters). 2471: # client - Filehandle open on the client. 2472: # Return: 2473: # 1. 2474: sub user_has_session_handler { 2475: my ($cmd, $tail, $client) = @_; 2476: 2477: my ($udom, $uname) = map { &unescape($_) } (split(/:/, $tail)); 2478: 2479: opendir(DIR,$perlvar{'lonIDsDir'}); 2480: my $filename; 2481: while ($filename=readdir(DIR)) { 2482: last if ($filename=~/^\Q$uname\E_\d+_\Q$udom\E_/); 2483: } 2484: if ($filename) { 2485: &Reply($client, "ok\n", "$cmd:$tail"); 2486: } else { 2487: &Failure($client, "not_found\n", "$cmd:$tail"); 2488: } 2489: return 1; 2490: 2491: } 2492: &register_handler("userhassession", \&user_has_session_handler, 0,1,0); 2493: 2494: # 2495: # Authenticate access to a user file by checking that the token the user's 2496: # passed also exists in their session file 2497: # 2498: # Parameters: 2499: # cmd - The request keyword that dispatched to tus. 2500: # tail - The tail of the request (colon separated parameters). 2501: # client - Filehandle open on the client. 2502: # Return: 2503: # 1. 2504: sub token_auth_user_file_handler { 2505: my ($cmd, $tail, $client) = @_; 2506: 2507: my ($fname, $session) = split(/:/, $tail); 2508: 2509: chomp($session); 2510: my $reply="non_auth"; 2511: my $file = $perlvar{'lonIDsDir'}.'/'.$session.'.id'; 2512: if (open(ENVIN,"$file")) { 2513: flock(ENVIN,LOCK_SH); 2514: tie(my %disk_env,'GDBM_File',"$file",&GDBM_READER(),0640); 2515: if (exists($disk_env{"userfile.$fname"})) { 2516: $reply="ok"; 2517: } else { 2518: foreach my $envname (keys(%disk_env)) { 2519: if ($envname=~ m|^userfile\.\Q$fname\E|) { 2520: $reply="ok"; 2521: last; 2522: } 2523: } 2524: } 2525: untie(%disk_env); 2526: close(ENVIN); 2527: &Reply($client, \$reply, "$cmd:$tail"); 2528: } else { 2529: &Failure($client, "invalid_token\n", "$cmd:$tail"); 2530: } 2531: return 1; 2532: 2533: } 2534: &register_handler("tokenauthuserfile", \&token_auth_user_file_handler, 0,1,0); 2535: 2536: # 2537: # Unsubscribe from a resource. 2538: # 2539: # Parameters: 2540: # $cmd - The command that got us here. 2541: # $tail - Tail of the command (remaining parameters). 2542: # $client - File descriptor connected to client. 2543: # Returns 2544: # 0 - Requested to exit, caller should shut down. 2545: # 1 - Continue processing. 2546: # 2547: sub unsubscribe_handler { 2548: my ($cmd, $tail, $client) = @_; 2549: 2550: my $userinput= "$cmd:$tail"; 2551: 2552: my ($fname) = split(/:/,$tail); # Split in case there's extrs. 2553: 2554: &Debug("Unsubscribing $fname"); 2555: if (-e $fname) { 2556: &Debug("Exists"); 2557: &Reply($client, &unsub($fname,$clientip), $userinput); 2558: } else { 2559: &Failure($client, "not_found\n", $userinput); 2560: } 2561: return 1; 2562: } 2563: &register_handler("unsub", \&unsubscribe_handler, 0, 1, 0); 2564: 2565: # Subscribe to a resource 2566: # 2567: # Parameters: 2568: # $cmd - The command that got us here. 2569: # $tail - Tail of the command (remaining parameters). 2570: # $client - File descriptor connected to client. 2571: # Returns 2572: # 0 - Requested to exit, caller should shut down. 2573: # 1 - Continue processing. 2574: # 2575: sub subscribe_handler { 2576: my ($cmd, $tail, $client)= @_; 2577: 2578: my $userinput = "$cmd:$tail"; 2579: 2580: &Reply( $client, &subscribe($userinput,$clientip), $userinput); 2581: 2582: return 1; 2583: } 2584: &register_handler("sub", \&subscribe_handler, 0, 1, 0); 2585: 2586: # 2587: # Determine the latest version of a resource (it looks for the highest 2588: # past version and then returns that +1) 2589: # 2590: # Parameters: 2591: # $cmd - The command that got us here. 2592: # $tail - Tail of the command (remaining parameters). 2593: # (Should consist of an absolute path to a file) 2594: # $client - File descriptor connected to client. 2595: # Returns 2596: # 0 - Requested to exit, caller should shut down. 2597: # 1 - Continue processing. 2598: # 2599: sub current_version_handler { 2600: my ($cmd, $tail, $client) = @_; 2601: 2602: my $userinput= "$cmd:$tail"; 2603: 2604: my $fname = $tail; 2605: &Reply( $client, &currentversion($fname)."\n", $userinput); 2606: return 1; 2607: 2608: } 2609: &register_handler("currentversion", \&current_version_handler, 0, 1, 0); 2610: 2611: # Make an entry in a user's activity log. 2612: # 2613: # Parameters: 2614: # $cmd - The command that got us here. 2615: # $tail - Tail of the command (remaining parameters). 2616: # $client - File descriptor connected to client. 2617: # Returns 2618: # 0 - Requested to exit, caller should shut down. 2619: # 1 - Continue processing. 2620: # 2621: sub activity_log_handler { 2622: my ($cmd, $tail, $client) = @_; 2623: 2624: 2625: my $userinput= "$cmd:$tail"; 2626: 2627: my ($udom,$uname,$what)=split(/:/,$tail); 2628: chomp($what); 2629: my $proname=&propath($udom,$uname); 2630: my $now=time; 2631: my $hfh; 2632: if ($hfh=IO::File->new(">>$proname/activity.log")) { 2633: print $hfh "$now:$clientname:$what\n"; 2634: &Reply( $client, "ok\n", $userinput); 2635: } else { 2636: &Failure($client, "error: ".($!+0)." IO::File->new Failed " 2637: ."while attempting log\n", 2638: $userinput); 2639: } 2640: 2641: return 1; 2642: } 2643: &register_handler("log", \&activity_log_handler, 0, 1, 0); 2644: 2645: # 2646: # Put a namespace entry in a user profile hash. 2647: # My druthers would be for this to be an encrypted interaction too. 2648: # anything that might be an inadvertent covert channel about either 2649: # user authentication or user personal information.... 2650: # 2651: # Parameters: 2652: # $cmd - The command that got us here. 2653: # $tail - Tail of the command (remaining parameters). 2654: # $client - File descriptor connected to client. 2655: # Returns 2656: # 0 - Requested to exit, caller should shut down. 2657: # 1 - Continue processing. 2658: # 2659: sub put_user_profile_entry { 2660: my ($cmd, $tail, $client) = @_; 2661: 2662: my $userinput = "$cmd:$tail"; 2663: 2664: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4); 2665: if ($namespace ne 'roles') { 2666: chomp($what); 2667: my $hashref = &tie_user_hash($udom, $uname, $namespace, 2668: &GDBM_WRCREAT(),"P",$what); 2669: if($hashref) { 2670: my @pairs=split(/\&/,$what); 2671: foreach my $pair (@pairs) { 2672: my ($key,$value)=split(/=/,$pair); 2673: $hashref->{$key}=$value; 2674: } 2675: if (&untie_user_hash($hashref)) { 2676: &Reply( $client, "ok\n", $userinput); 2677: } else { 2678: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ". 2679: "while attempting put\n", 2680: $userinput); 2681: } 2682: } else { 2683: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ". 2684: "while attempting put\n", $userinput); 2685: } 2686: } else { 2687: &Failure( $client, "refused\n", $userinput); 2688: } 2689: 2690: return 1; 2691: } 2692: &register_handler("put", \&put_user_profile_entry, 0, 1, 0); 2693: 2694: # Put a piece of new data in hash, returns error if entry already exists 2695: # Parameters: 2696: # $cmd - The command that got us here. 2697: # $tail - Tail of the command (remaining parameters). 2698: # $client - File descriptor connected to client. 2699: # Returns 2700: # 0 - Requested to exit, caller should shut down. 2701: # 1 - Continue processing. 2702: # 2703: sub newput_user_profile_entry { 2704: my ($cmd, $tail, $client) = @_; 2705: 2706: my $userinput = "$cmd:$tail"; 2707: 2708: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4); 2709: if ($namespace eq 'roles') { 2710: &Failure( $client, "refused\n", $userinput); 2711: return 1; 2712: } 2713: 2714: chomp($what); 2715: 2716: my $hashref = &tie_user_hash($udom, $uname, $namespace, 2717: &GDBM_WRCREAT(),"N",$what); 2718: if(!$hashref) { 2719: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ". 2720: "while attempting put\n", $userinput); 2721: return 1; 2722: } 2723: 2724: my @pairs=split(/\&/,$what); 2725: foreach my $pair (@pairs) { 2726: my ($key,$value)=split(/=/,$pair); 2727: if (exists($hashref->{$key})) { 2728: &Failure($client, "key_exists: ".$key."\n",$userinput); 2729: return 1; 2730: } 2731: } 2732: 2733: foreach my $pair (@pairs) { 2734: my ($key,$value)=split(/=/,$pair); 2735: $hashref->{$key}=$value; 2736: } 2737: 2738: if (&untie_user_hash($hashref)) { 2739: &Reply( $client, "ok\n", $userinput); 2740: } else { 2741: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ". 2742: "while attempting put\n", 2743: $userinput); 2744: } 2745: return 1; 2746: } 2747: &register_handler("newput", \&newput_user_profile_entry, 0, 1, 0); 2748: 2749: # 2750: # Increment a profile entry in the user history file. 2751: # The history contains keyword value pairs. In this case, 2752: # The value itself is a pair of numbers. The first, the current value 2753: # the second an increment that this function applies to the current 2754: # value. 2755: # 2756: # Parameters: 2757: # $cmd - The command that got us here. 2758: # $tail - Tail of the command (remaining parameters). 2759: # $client - File descriptor connected to client. 2760: # Returns 2761: # 0 - Requested to exit, caller should shut down. 2762: # 1 - Continue processing. 2763: # 2764: sub increment_user_value_handler { 2765: my ($cmd, $tail, $client) = @_; 2766: 2767: my $userinput = "$cmd:$tail"; 2768: 2769: my ($udom,$uname,$namespace,$what) =split(/:/,$tail); 2770: if ($namespace ne 'roles') { 2771: chomp($what); 2772: my $hashref = &tie_user_hash($udom, $uname, 2773: $namespace, &GDBM_WRCREAT(), 2774: "P",$what); 2775: if ($hashref) { 2776: my @pairs=split(/\&/,$what); 2777: foreach my $pair (@pairs) { 2778: my ($key,$value)=split(/=/,$pair); 2779: $value = &unescape($value); 2780: # We could check that we have a number... 2781: if (! defined($value) || $value eq '') { 2782: $value = 1; 2783: } 2784: $hashref->{$key}+=$value; 2785: if ($namespace eq 'nohist_resourcetracker') { 2786: if ($hashref->{$key} < 0) { 2787: $hashref->{$key} = 0; 2788: } 2789: } 2790: } 2791: if (&untie_user_hash($hashref)) { 2792: &Reply( $client, "ok\n", $userinput); 2793: } else { 2794: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ". 2795: "while attempting inc\n", $userinput); 2796: } 2797: } else { 2798: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ". 2799: "while attempting inc\n", $userinput); 2800: } 2801: } else { 2802: &Failure($client, "refused\n", $userinput); 2803: } 2804: 2805: return 1; 2806: } 2807: &register_handler("inc", \&increment_user_value_handler, 0, 1, 0); 2808: 2809: # 2810: # Put a new role for a user. Roles are LonCAPA's packaging of permissions. 2811: # Each 'role' a user has implies a set of permissions. Adding a new role 2812: # for a person grants the permissions packaged with that role 2813: # to that user when the role is selected. 2814: # 2815: # Parameters: 2816: # $cmd - The command string (rolesput). 2817: # $tail - The remainder of the request line. For rolesput this 2818: # consists of a colon separated list that contains: 2819: # The domain and user that is granting the role (logged). 2820: # The domain and user that is getting the role. 2821: # The roles being granted as a set of & separated pairs. 2822: # each pair a key value pair. 2823: # $client - File descriptor connected to the client. 2824: # Returns: 2825: # 0 - If the daemon should exit 2826: # 1 - To continue processing. 2827: # 2828: # 2829: sub roles_put_handler { 2830: my ($cmd, $tail, $client) = @_; 2831: 2832: my $userinput = "$cmd:$tail"; 2833: 2834: my ( $exedom, $exeuser, $udom, $uname, $what) = split(/:/,$tail); 2835: 2836: 2837: my $namespace='roles'; 2838: chomp($what); 2839: my $hashref = &tie_user_hash($udom, $uname, $namespace, 2840: &GDBM_WRCREAT(), "P", 2841: "$exedom:$exeuser:$what"); 2842: # 2843: # Log the attempt to set a role. The {}'s here ensure that the file 2844: # handle is open for the minimal amount of time. Since the flush 2845: # is done on close this improves the chances the log will be an un- 2846: # corrupted ordered thing. 2847: if ($hashref) { 2848: my $pass_entry = &get_auth_type($udom, $uname); 2849: my ($auth_type,$pwd) = split(/:/, $pass_entry); 2850: $auth_type = $auth_type.":"; 2851: my @pairs=split(/\&/,$what); 2852: foreach my $pair (@pairs) { 2853: my ($key,$value)=split(/=/,$pair); 2854: &manage_permissions($key, $udom, $uname, 2855: $auth_type); 2856: $hashref->{$key}=$value; 2857: } 2858: if (&untie_user_hash($hashref)) { 2859: &Reply($client, "ok\n", $userinput); 2860: } else { 2861: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ". 2862: "while attempting rolesput\n", $userinput); 2863: } 2864: } else { 2865: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ". 2866: "while attempting rolesput\n", $userinput); 2867: } 2868: return 1; 2869: } 2870: &register_handler("rolesput", \&roles_put_handler, 1,1,0); # Encoded client only. 2871: 2872: # 2873: # Deletes (removes) a role for a user. This is equivalent to removing 2874: # a permissions package associated with the role from the user's profile. 2875: # 2876: # Parameters: 2877: # $cmd - The command (rolesdel) 2878: # $tail - The remainder of the request line. This consists 2879: # of: 2880: # The domain and user requesting the change (logged) 2881: # The domain and user being changed. 2882: # The roles being revoked. These are shipped to us 2883: # as a bunch of & separated role name keywords. 2884: # $client - The file handle open on the client. 2885: # Returns: 2886: # 1 - Continue processing 2887: # 0 - Exit. 2888: # 2889: sub roles_delete_handler { 2890: my ($cmd, $tail, $client) = @_; 2891: 2892: my $userinput = "$cmd:$tail"; 2893: 2894: my ($exedom,$exeuser,$udom,$uname,$what)=split(/:/,$tail); 2895: &Debug("cmd = ".$cmd." exedom= ".$exedom."user = ".$exeuser." udom=".$udom. 2896: "what = ".$what); 2897: my $namespace='roles'; 2898: chomp($what); 2899: my $hashref = &tie_user_hash($udom, $uname, $namespace, 2900: &GDBM_WRCREAT(), "D", 2901: "$exedom:$exeuser:$what"); 2902: 2903: if ($hashref) { 2904: my @rolekeys=split(/\&/,$what); 2905: 2906: foreach my $key (@rolekeys) { 2907: delete $hashref->{$key}; 2908: } 2909: if (&untie_user_hash($hashref)) { 2910: &Reply($client, "ok\n", $userinput); 2911: } else { 2912: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ". 2913: "while attempting rolesdel\n", $userinput); 2914: } 2915: } else { 2916: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ". 2917: "while attempting rolesdel\n", $userinput); 2918: } 2919: 2920: return 1; 2921: } 2922: &register_handler("rolesdel", \&roles_delete_handler, 1,1, 0); # Encoded client only 2923: 2924: # Unencrypted get from a user's profile database. See 2925: # GetProfileEntryEncrypted for a version that does end-to-end encryption. 2926: # This function retrieves a keyed item from a specific named database in the 2927: # user's directory. 2928: # 2929: # Parameters: 2930: # $cmd - Command request keyword (get). 2931: # $tail - Tail of the command. This is a colon separated list 2932: # consisting of the domain and username that uniquely 2933: # identifies the profile, 2934: # The 'namespace' which selects the gdbm file to 2935: # do the lookup in, 2936: # & separated list of keys to lookup. Note that 2937: # the values are returned as an & separated list too. 2938: # $client - File descriptor open on the client. 2939: # Returns: 2940: # 1 - Continue processing. 2941: # 0 - Exit. 2942: # 2943: sub get_profile_entry { 2944: my ($cmd, $tail, $client) = @_; 2945: 2946: my $userinput= "$cmd:$tail"; 2947: 2948: my ($udom,$uname,$namespace,$what) = split(/:/,$tail); 2949: chomp($what); 2950: 2951: 2952: my $replystring = read_profile($udom, $uname, $namespace, $what); 2953: my ($first) = split(/:/,$replystring); 2954: if($first ne "error") { 2955: &Reply($client, \$replystring, $userinput); 2956: } else { 2957: &Failure($client, $replystring." while attempting get\n", $userinput); 2958: } 2959: return 1; 2960: 2961: 2962: } 2963: &register_handler("get", \&get_profile_entry, 0,1,0); 2964: 2965: # 2966: # Process the encrypted get request. Note that the request is sent 2967: # in clear, but the reply is encrypted. This is a small covert channel: 2968: # information about the sensitive keys is given to the snooper. Just not 2969: # information about the values of the sensitive key. Hmm if I wanted to 2970: # know these I'd snoop for the egets. Get the profile item names from them 2971: # and then issue a get for them since there's no enforcement of the 2972: # requirement of an encrypted get for particular profile items. If I 2973: # were re-doing this, I'd force the request to be encrypted as well as the 2974: # reply. I'd also just enforce encrypted transactions for all gets since 2975: # that would prevent any covert channel snooping. 2976: # 2977: # Parameters: 2978: # $cmd - Command keyword of request (eget). 2979: # $tail - Tail of the command. See GetProfileEntry # for more information about this. 2980: # $client - File open on the client. 2981: # Returns: 2982: # 1 - Continue processing 2983: # 0 - server should exit. 2984: sub get_profile_entry_encrypted { 2985: my ($cmd, $tail, $client) = @_; 2986: 2987: my $userinput = "$cmd:$tail"; 2988: 2989: my ($udom,$uname,$namespace,$what) = split(/:/,$tail); 2990: chomp($what); 2991: my $qresult = read_profile($udom, $uname, $namespace, $what); 2992: my ($first) = split(/:/, $qresult); 2993: if($first ne "error") { 2994: 2995: if ($cipher) { 2996: my $cmdlength=length($qresult); 2997: $qresult.=" "; 2998: my $encqresult=''; 2999: for(my $encidx=0;$encidx<=$cmdlength;$encidx+=8) { 3000: $encqresult.= unpack("H16", 3001: $cipher->encrypt(substr($qresult, 3002: $encidx, 3003: 8))); 3004: } 3005: &Reply( $client, "enc:$cmdlength:$encqresult\n", $userinput); 3006: } else { 3007: &Failure( $client, "error:no_key\n", $userinput); 3008: } 3009: } else { 3010: &Failure($client, "$qresult while attempting eget\n", $userinput); 3011: 3012: } 3013: 3014: return 1; 3015: } 3016: &register_handler("eget", \&get_profile_entry_encrypted, 0, 1, 0); 3017: 3018: # 3019: # Deletes a key in a user profile database. 3020: # 3021: # Parameters: 3022: # $cmd - Command keyword (del). 3023: # $tail - Command tail. IN this case a colon 3024: # separated list containing: 3025: # The domain and user that identifies uniquely 3026: # the identity of the user. 3027: # The profile namespace (name of the profile 3028: # database file). 3029: # & separated list of keywords to delete. 3030: # $client - File open on client socket. 3031: # Returns: 3032: # 1 - Continue processing 3033: # 0 - Exit server. 3034: # 3035: # 3036: sub delete_profile_entry { 3037: my ($cmd, $tail, $client) = @_; 3038: 3039: my $userinput = "cmd:$tail"; 3040: 3041: my ($udom,$uname,$namespace,$what) = split(/:/,$tail); 3042: chomp($what); 3043: my $hashref = &tie_user_hash($udom, $uname, $namespace, 3044: &GDBM_WRCREAT(), 3045: "D",$what); 3046: if ($hashref) { 3047: my @keys=split(/\&/,$what); 3048: foreach my $key (@keys) { 3049: delete($hashref->{$key}); 3050: } 3051: if (&untie_user_hash($hashref)) { 3052: &Reply($client, "ok\n", $userinput); 3053: } else { 3054: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". 3055: "while attempting del\n", $userinput); 3056: } 3057: } else { 3058: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ". 3059: "while attempting del\n", $userinput); 3060: } 3061: return 1; 3062: } 3063: &register_handler("del", \&delete_profile_entry, 0, 1, 0); 3064: 3065: # 3066: # List the set of keys that are defined in a profile database file. 3067: # A successful reply from this will contain an & separated list of 3068: # the keys. 3069: # Parameters: 3070: # $cmd - Command request (keys). 3071: # $tail - Remainder of the request, a colon separated 3072: # list containing domain/user that identifies the 3073: # user being queried, and the database namespace 3074: # (database filename essentially). 3075: # $client - File open on the client. 3076: # Returns: 3077: # 1 - Continue processing. 3078: # 0 - Exit the server. 3079: # 3080: sub get_profile_keys { 3081: my ($cmd, $tail, $client) = @_; 3082: 3083: my $userinput = "$cmd:$tail"; 3084: 3085: my ($udom,$uname,$namespace)=split(/:/,$tail); 3086: my $qresult=''; 3087: my $hashref = &tie_user_hash($udom, $uname, $namespace, 3088: &GDBM_READER()); 3089: if ($hashref) { 3090: foreach my $key (keys %$hashref) { 3091: $qresult.="$key&"; 3092: } 3093: if (&untie_user_hash($hashref)) { 3094: $qresult=~s/\&$//; 3095: &Reply($client, \$qresult, $userinput); 3096: } else { 3097: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". 3098: "while attempting keys\n", $userinput); 3099: } 3100: } else { 3101: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ". 3102: "while attempting keys\n", $userinput); 3103: } 3104: 3105: return 1; 3106: } 3107: &register_handler("keys", \&get_profile_keys, 0, 1, 0); 3108: 3109: # 3110: # Dump the contents of a user profile database. 3111: # Note that this constitutes a very large covert channel too since 3112: # the dump will return sensitive information that is not encrypted. 3113: # The naive security assumption is that the session negotiation ensures 3114: # our client is trusted and I don't believe that's assured at present. 3115: # Sure want badly to go to ssl or tls. Of course if my peer isn't really 3116: # a LonCAPA node they could have negotiated an encryption key too so >sigh<. 3117: # 3118: # Parameters: 3119: # $cmd - The command request keyword (currentdump). 3120: # $tail - Remainder of the request, consisting of a colon 3121: # separated list that has the domain/username and 3122: # the namespace to dump (database file). 3123: # $client - file open on the remote client. 3124: # Returns: 3125: # 1 - Continue processing. 3126: # 0 - Exit the server. 3127: # 3128: sub dump_profile_database { 3129: my ($cmd, $tail, $client) = @_; 3130: 3131: my $userinput = "$cmd:$tail"; 3132: 3133: my ($udom,$uname,$namespace) = split(/:/,$tail); 3134: my $hashref = &tie_user_hash($udom, $uname, $namespace, 3135: &GDBM_READER()); 3136: if ($hashref) { 3137: # Structure of %data: 3138: # $data{$symb}->{$parameter}=$value; 3139: # $data{$symb}->{'v.'.$parameter}=$version; 3140: # since $parameter will be unescaped, we do not 3141: # have to worry about silly parameter names... 3142: 3143: my $qresult=''; 3144: my %data = (); # A hash of anonymous hashes.. 3145: while (my ($key,$value) = each(%$hashref)) { 3146: my ($v,$symb,$param) = split(/:/,$key); 3147: next if ($v eq 'version' || $symb eq 'keys'); 3148: next if (exists($data{$symb}) && 3149: exists($data{$symb}->{$param}) && 3150: $data{$symb}->{'v.'.$param} > $v); 3151: $data{$symb}->{$param}=$value; 3152: $data{$symb}->{'v.'.$param}=$v; 3153: } 3154: if (&untie_user_hash($hashref)) { 3155: while (my ($symb,$param_hash) = each(%data)) { 3156: while(my ($param,$value) = each (%$param_hash)){ 3157: next if ($param =~ /^v\./); # Ignore versions... 3158: # 3159: # Just dump the symb=value pairs separated by & 3160: # 3161: $qresult.=$symb.':'.$param.'='.$value.'&'; 3162: } 3163: } 3164: chop($qresult); 3165: &Reply($client , \$qresult, $userinput); 3166: } else { 3167: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ". 3168: "while attempting currentdump\n", $userinput); 3169: } 3170: } else { 3171: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ". 3172: "while attempting currentdump\n", $userinput); 3173: } 3174: 3175: return 1; 3176: } 3177: &register_handler("currentdump", \&dump_profile_database, 0, 1, 0); 3178: 3179: # 3180: # Dump a profile database with an optional regular expression 3181: # to match against the keys. In this dump, no effort is made 3182: # to separate symb from version information. Presumably the 3183: # databases that are dumped by this command are of a different 3184: # structure. Need to look at this and improve the documentation of 3185: # both this and the currentdump handler. 3186: # Parameters: 3187: # $cmd - The command keyword. 3188: # $tail - All of the characters after the $cmd: 3189: # These are expected to be a colon 3190: # separated list containing: 3191: # domain/user - identifying the user. 3192: # namespace - identifying the database. 3193: # regexp - optional regular expression 3194: # that is matched against 3195: # database keywords to do 3196: # selective dumps. 3197: # $client - Channel open on the client. 3198: # Returns: 3199: # 1 - Continue processing. 3200: # Side effects: 3201: # response is written to $client. 3202: # 3203: sub dump_with_regexp { 3204: my ($cmd, $tail, $client) = @_; 3205: 3206: 3207: my $userinput = "$cmd:$tail"; 3208: 3209: my ($udom,$uname,$namespace,$regexp,$range,$extra)=split(/:/,$tail); 3210: if (defined($regexp)) { 3211: $regexp=&unescape($regexp); 3212: } else { 3213: $regexp='.'; 3214: } 3215: my ($start,$end); 3216: if (defined($range)) { 3217: if ($range =~/^(\d+)\-(\d+)$/) { 3218: ($start,$end) = ($1,$2); 3219: } elsif ($range =~/^(\d+)$/) { 3220: ($start,$end) = (0,$1); 3221: } else { 3222: undef($range); 3223: } 3224: } 3225: my $hashref = &tie_user_hash($udom, $uname, $namespace, 3226: &GDBM_READER()); 3227: my $skipcheck; 3228: if ($hashref) { 3229: my $qresult=''; 3230: my $count=0; 3231: if ($extra ne '') { 3232: $extra = &Apache::lonnet::thaw_unescape($extra); 3233: $skipcheck = $extra->{'skipcheck'}; 3234: } 3235: my @ids = &Apache::lonnet::current_machine_ids(); 3236: my (%homecourses,$major,$minor,$now); 3237: if (($namespace eq 'roles') && (!$skipcheck)) { 3238: my $loncaparev = $clientversion; 3239: if ($loncaparev eq '') { 3240: $loncaparev = $Apache::lonnet::loncaparevs{$clientname}; 3241: } 3242: if ($loncaparev =~ /^\'?(\d+)\.(\d+)\.[\w.\-]+\'?/) { 3243: $major = $1; 3244: $minor = $2; 3245: } 3246: $now = time; 3247: } 3248: while (my ($key,$value) = each(%$hashref)) { 3249: if ($namespace eq 'roles') { 3250: if ($key =~ m{^/($LONCAPA::match_domain)/($LONCAPA::match_courseid)(/?[^_]*)_(cc|co|in|ta|ep|ad|st|cr)$}) { 3251: my $cdom = $1; 3252: my $cnum = $2; 3253: unless ($skipcheck) { 3254: my ($role,$end,$start) = split(/\_/,$value); 3255: if (!$end || $end > $now) { 3256: next unless (&releasereqd_check($cnum,$cdom,$key,$value,$major, 3257: $minor,\%homecourses,\@ids)); 3258: } 3259: } 3260: } 3261: } 3262: if ($regexp eq '.') { 3263: $count++; 3264: if (defined($range) && $count >= $end) { last; } 3265: if (defined($range) && $count < $start) { next; } 3266: $qresult.=$key.'='.$value.'&'; 3267: } else { 3268: my $unescapeKey = &unescape($key); 3269: if (eval('$unescapeKey=~/$regexp/')) { 3270: $count++; 3271: if (defined($range) && $count >= $end) { last; } 3272: if (defined($range) && $count < $start) { next; } 3273: $qresult.="$key=$value&"; 3274: } 3275: } 3276: } 3277: if (&untie_user_hash($hashref)) { 3278: if (($namespace eq 'roles') && (!$skipcheck)) { 3279: if (keys(%homecourses) > 0) { 3280: $qresult .= &check_homecourses(\%homecourses,$udom,$regexp,$count, 3281: $range,$start,$end,$major,$minor); 3282: } 3283: } 3284: chop($qresult); 3285: &Reply($client, \$qresult, $userinput); 3286: } else { 3287: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ". 3288: "while attempting dump\n", $userinput); 3289: } 3290: } else { 3291: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ". 3292: "while attempting dump\n", $userinput); 3293: } 3294: 3295: return 1; 3296: } 3297: &register_handler("dump", \&dump_with_regexp, 0, 1, 0); 3298: 3299: # Store a set of key=value pairs associated with a versioned name. 3300: # 3301: # Parameters: 3302: # $cmd - Request command keyword. 3303: # $tail - Tail of the request. This is a colon 3304: # separated list containing: 3305: # domain/user - User and authentication domain. 3306: # namespace - Name of the database being modified 3307: # rid - Resource keyword to modify. 3308: # what - new value associated with rid. 3309: # 3310: # $client - Socket open on the client. 3311: # 3312: # 3313: # Returns: 3314: # 1 (keep on processing). 3315: # Side-Effects: 3316: # Writes to the client 3317: sub store_handler { 3318: my ($cmd, $tail, $client) = @_; 3319: 3320: my $userinput = "$cmd:$tail"; 3321: 3322: my ($udom,$uname,$namespace,$rid,$what) =split(/:/,$tail); 3323: if ($namespace ne 'roles') { 3324: 3325: chomp($what); 3326: my @pairs=split(/\&/,$what); 3327: my $hashref = &tie_user_hash($udom, $uname, $namespace, 3328: &GDBM_WRCREAT(), "S", 3329: "$rid:$what"); 3330: if ($hashref) { 3331: my $now = time; 3332: my @previouskeys=split(/&/,$hashref->{"keys:$rid"}); 3333: my $key; 3334: $hashref->{"version:$rid"}++; 3335: my $version=$hashref->{"version:$rid"}; 3336: my $allkeys=''; 3337: foreach my $pair (@pairs) { 3338: my ($key,$value)=split(/=/,$pair); 3339: $allkeys.=$key.':'; 3340: $hashref->{"$version:$rid:$key"}=$value; 3341: } 3342: $hashref->{"$version:$rid:timestamp"}=$now; 3343: $allkeys.='timestamp'; 3344: $hashref->{"$version:keys:$rid"}=$allkeys; 3345: if (&untie_user_hash($hashref)) { 3346: &Reply($client, "ok\n", $userinput); 3347: } else { 3348: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". 3349: "while attempting store\n", $userinput); 3350: } 3351: } else { 3352: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ". 3353: "while attempting store\n", $userinput); 3354: } 3355: } else { 3356: &Failure($client, "refused\n", $userinput); 3357: } 3358: 3359: return 1; 3360: } 3361: &register_handler("store", \&store_handler, 0, 1, 0); 3362: 3363: # Modify a set of key=value pairs associated with a versioned name. 3364: # 3365: # Parameters: 3366: # $cmd - Request command keyword. 3367: # $tail - Tail of the request. This is a colon 3368: # separated list containing: 3369: # domain/user - User and authentication domain. 3370: # namespace - Name of the database being modified 3371: # rid - Resource keyword to modify. 3372: # v - Version item to modify 3373: # what - new value associated with rid. 3374: # 3375: # $client - Socket open on the client. 3376: # 3377: # 3378: # Returns: 3379: # 1 (keep on processing). 3380: # Side-Effects: 3381: # Writes to the client 3382: sub putstore_handler { 3383: my ($cmd, $tail, $client) = @_; 3384: 3385: my $userinput = "$cmd:$tail"; 3386: 3387: my ($udom,$uname,$namespace,$rid,$v,$what) =split(/:/,$tail); 3388: if ($namespace ne 'roles') { 3389: 3390: chomp($what); 3391: my $hashref = &tie_user_hash($udom, $uname, $namespace, 3392: &GDBM_WRCREAT(), "M", 3393: "$rid:$v:$what"); 3394: if ($hashref) { 3395: my $now = time; 3396: my %data = &hash_extract($what); 3397: my @allkeys; 3398: while (my($key,$value) = each(%data)) { 3399: push(@allkeys,$key); 3400: $hashref->{"$v:$rid:$key"} = $value; 3401: } 3402: my $allkeys = join(':',@allkeys); 3403: $hashref->{"$v:keys:$rid"}=$allkeys; 3404: 3405: if (&untie_user_hash($hashref)) { 3406: &Reply($client, "ok\n", $userinput); 3407: } else { 3408: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". 3409: "while attempting store\n", $userinput); 3410: } 3411: } else { 3412: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ". 3413: "while attempting store\n", $userinput); 3414: } 3415: } else { 3416: &Failure($client, "refused\n", $userinput); 3417: } 3418: 3419: return 1; 3420: } 3421: &register_handler("putstore", \&putstore_handler, 0, 1, 0); 3422: 3423: sub hash_extract { 3424: my ($str)=@_; 3425: my %hash; 3426: foreach my $pair (split(/\&/,$str)) { 3427: my ($key,$value)=split(/=/,$pair); 3428: $hash{$key}=$value; 3429: } 3430: return (%hash); 3431: } 3432: sub hash_to_str { 3433: my ($hash_ref)=@_; 3434: my $str; 3435: foreach my $key (keys(%$hash_ref)) { 3436: $str.=$key.'='.$hash_ref->{$key}.'&'; 3437: } 3438: $str=~s/\&$//; 3439: return $str; 3440: } 3441: 3442: # 3443: # Dump out all versions of a resource that has key=value pairs associated 3444: # with it for each version. These resources are built up via the store 3445: # command. 3446: # 3447: # Parameters: 3448: # $cmd - Command keyword. 3449: # $tail - Remainder of the request which consists of: 3450: # domain/user - User and auth. domain. 3451: # namespace - name of resource database. 3452: # rid - Resource id. 3453: # $client - socket open on the client. 3454: # 3455: # Returns: 3456: # 1 indicating the caller should not yet exit. 3457: # Side-effects: 3458: # Writes a reply to the client. 3459: # The reply is a string of the following shape: 3460: # version=current&version:keys=k1:k2...&1:k1=v1&1:k2=v2... 3461: # Where the 1 above represents version 1. 3462: # this continues for all pairs of keys in all versions. 3463: # 3464: # 3465: # 3466: # 3467: sub restore_handler { 3468: my ($cmd, $tail, $client) = @_; 3469: 3470: my $userinput = "$cmd:$tail"; # Only used for logging purposes. 3471: my ($udom,$uname,$namespace,$rid) = split(/:/,$tail); 3472: $namespace=~s/\//\_/g; 3473: $namespace = &LONCAPA::clean_username($namespace); 3474: 3475: chomp($rid); 3476: my $qresult=''; 3477: my $hashref = &tie_user_hash($udom, $uname, $namespace, &GDBM_READER()); 3478: if ($hashref) { 3479: my $version=$hashref->{"version:$rid"}; 3480: $qresult.="version=$version&"; 3481: my $scope; 3482: for ($scope=1;$scope<=$version;$scope++) { 3483: my $vkeys=$hashref->{"$scope:keys:$rid"}; 3484: my @keys=split(/:/,$vkeys); 3485: my $key; 3486: $qresult.="$scope:keys=$vkeys&"; 3487: foreach $key (@keys) { 3488: $qresult.="$scope:$key=".$hashref->{"$scope:$rid:$key"}."&"; 3489: } 3490: } 3491: if (&untie_user_hash($hashref)) { 3492: $qresult=~s/\&$//; 3493: &Reply( $client, \$qresult, $userinput); 3494: } else { 3495: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". 3496: "while attempting restore\n", $userinput); 3497: } 3498: } else { 3499: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ". 3500: "while attempting restore\n", $userinput); 3501: } 3502: 3503: return 1; 3504: 3505: 3506: } 3507: &register_handler("restore", \&restore_handler, 0,1,0); 3508: 3509: # 3510: # Add a chat message to a synchronous discussion board. 3511: # 3512: # Parameters: 3513: # $cmd - Request keyword. 3514: # $tail - Tail of the command. A colon separated list 3515: # containing: 3516: # cdom - Domain on which the chat board lives 3517: # cnum - Course containing the chat board. 3518: # newpost - Body of the posting. 3519: # group - Optional group, if chat board is only 3520: # accessible in a group within the course 3521: # $client - Socket open on the client. 3522: # Returns: 3523: # 1 - Indicating caller should keep on processing. 3524: # 3525: # Side-effects: 3526: # writes a reply to the client. 3527: # 3528: # 3529: sub send_chat_handler { 3530: my ($cmd, $tail, $client) = @_; 3531: 3532: 3533: my $userinput = "$cmd:$tail"; 3534: 3535: my ($cdom,$cnum,$newpost,$group)=split(/\:/,$tail); 3536: &chat_add($cdom,$cnum,$newpost,$group); 3537: &Reply($client, "ok\n", $userinput); 3538: 3539: return 1; 3540: } 3541: &register_handler("chatsend", \&send_chat_handler, 0, 1, 0); 3542: 3543: # 3544: # Retrieve the set of chat messages from a discussion board. 3545: # 3546: # Parameters: 3547: # $cmd - Command keyword that initiated the request. 3548: # $tail - Remainder of the request after the command 3549: # keyword. In this case a colon separated list of 3550: # chat domain - Which discussion board. 3551: # chat id - Discussion thread(?) 3552: # domain/user - Authentication domain and username 3553: # of the requesting person. 3554: # group - Optional course group containing 3555: # the board. 3556: # $client - Socket open on the client program. 3557: # Returns: 3558: # 1 - continue processing 3559: # Side effects: 3560: # Response is written to the client. 3561: # 3562: sub retrieve_chat_handler { 3563: my ($cmd, $tail, $client) = @_; 3564: 3565: 3566: my $userinput = "$cmd:$tail"; 3567: 3568: my ($cdom,$cnum,$udom,$uname,$group)=split(/\:/,$tail); 3569: my $reply=''; 3570: foreach (&get_chat($cdom,$cnum,$udom,$uname,$group)) { 3571: $reply.=&escape($_).':'; 3572: } 3573: $reply=~s/\:$//; 3574: &Reply($client, \$reply, $userinput); 3575: 3576: 3577: return 1; 3578: } 3579: &register_handler("chatretr", \&retrieve_chat_handler, 0, 1, 0); 3580: 3581: # 3582: # Initiate a query of an sql database. SQL query repsonses get put in 3583: # a file for later retrieval. This prevents sql query results from 3584: # bottlenecking the system. Note that with loncnew, perhaps this is 3585: # less of an issue since multiple outstanding requests can be concurrently 3586: # serviced. 3587: # 3588: # Parameters: 3589: # $cmd - COmmand keyword that initiated the request. 3590: # $tail - Remainder of the command after the keyword. 3591: # For this function, this consists of a query and 3592: # 3 arguments that are self-documentingly labelled 3593: # in the original arg1, arg2, arg3. 3594: # $client - Socket open on the client. 3595: # Return: 3596: # 1 - Indicating processing should continue. 3597: # Side-effects: 3598: # a reply is written to $client. 3599: # 3600: sub send_query_handler { 3601: my ($cmd, $tail, $client) = @_; 3602: 3603: 3604: my $userinput = "$cmd:$tail"; 3605: 3606: my ($query,$arg1,$arg2,$arg3)=split(/\:/,$tail); 3607: $query=~s/\n*$//g; 3608: &Reply($client, "". &sql_reply("$clientname\&$query". 3609: "\&$arg1"."\&$arg2"."\&$arg3")."\n", 3610: $userinput); 3611: 3612: return 1; 3613: } 3614: &register_handler("querysend", \&send_query_handler, 0, 1, 0); 3615: 3616: # 3617: # Add a reply to an sql query. SQL queries are done asyncrhonously. 3618: # The query is submitted via a "querysend" transaction. 3619: # There it is passed on to the lonsql daemon, queued and issued to 3620: # mysql. 3621: # This transaction is invoked when the sql transaction is complete 3622: # it stores the query results in flie and indicates query completion. 3623: # presumably local software then fetches this response... I'm guessing 3624: # the sequence is: lonc does a querysend, we ask lonsql to do it. 3625: # lonsql on completion of the query interacts with the lond of our 3626: # client to do a query reply storing two files: 3627: # - id - The results of the query. 3628: # - id.end - Indicating the transaction completed. 3629: # NOTE: id is a unique id assigned to the query and querysend time. 3630: # Parameters: 3631: # $cmd - Command keyword that initiated this request. 3632: # $tail - Remainder of the tail. In this case that's a colon 3633: # separated list containing the query Id and the 3634: # results of the query. 3635: # $client - Socket open on the client. 3636: # Return: 3637: # 1 - Indicating that we should continue processing. 3638: # Side effects: 3639: # ok written to the client. 3640: # 3641: sub reply_query_handler { 3642: my ($cmd, $tail, $client) = @_; 3643: 3644: 3645: my $userinput = "$cmd:$tail"; 3646: 3647: my ($id,$reply)=split(/:/,$tail); 3648: my $store; 3649: my $execdir=$perlvar{'lonDaemons'}; 3650: if ($store=IO::File->new(">$execdir/tmp/$id")) { 3651: $reply=~s/\&/\n/g; 3652: print $store $reply; 3653: close $store; 3654: my $store2=IO::File->new(">$execdir/tmp/$id.end"); 3655: print $store2 "done\n"; 3656: close $store2; 3657: &Reply($client, "ok\n", $userinput); 3658: } else { 3659: &Failure($client, "error: ".($!+0) 3660: ." IO::File->new Failed ". 3661: "while attempting queryreply\n", $userinput); 3662: } 3663: 3664: 3665: return 1; 3666: } 3667: &register_handler("queryreply", \&reply_query_handler, 0, 1, 0); 3668: 3669: # 3670: # Process the courseidput request. Not quite sure what this means 3671: # at the system level sense. It appears a gdbm file in the 3672: # /home/httpd/lonUsers/$domain/nohist_courseids is tied and 3673: # a set of entries made in that database. 3674: # 3675: # Parameters: 3676: # $cmd - The command keyword that initiated this request. 3677: # $tail - Tail of the command. In this case consists of a colon 3678: # separated list contaning the domain to apply this to and 3679: # an ampersand separated list of keyword=value pairs. 3680: # Each value is a colon separated list that includes: 3681: # description, institutional code and course owner. 3682: # For backward compatibility with versions included 3683: # in LON-CAPA 1.1.X (and earlier) and 1.2.X, institutional 3684: # code and/or course owner are preserved from the existing 3685: # record when writing a new record in response to 1.1 or 3686: # 1.2 implementations of lonnet::flushcourselogs(). 3687: # 3688: # $client - Socket open on the client. 3689: # Returns: 3690: # 1 - indicating that processing should continue 3691: # 3692: # Side effects: 3693: # reply is written to the client. 3694: # 3695: sub put_course_id_handler { 3696: my ($cmd, $tail, $client) = @_; 3697: 3698: 3699: my $userinput = "$cmd:$tail"; 3700: 3701: my ($udom, $what) = split(/:/, $tail,2); 3702: chomp($what); 3703: my $now=time; 3704: my @pairs=split(/\&/,$what); 3705: 3706: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT()); 3707: if ($hashref) { 3708: foreach my $pair (@pairs) { 3709: my ($key,$courseinfo) = split(/=/,$pair,2); 3710: $courseinfo =~ s/=/:/g; 3711: if (defined($hashref->{$key})) { 3712: my $value = &Apache::lonnet::thaw_unescape($hashref->{$key}); 3713: if (ref($value) eq 'HASH') { 3714: my @items = ('description','inst_code','owner','type'); 3715: my @new_items = split(/:/,$courseinfo,-1); 3716: my %storehash; 3717: for (my $i=0; $i<@new_items; $i++) { 3718: $storehash{$items[$i]} = &unescape($new_items[$i]); 3719: } 3720: $hashref->{$key} = 3721: &Apache::lonnet::freeze_escape(\%storehash); 3722: my $unesc_key = &unescape($key); 3723: $hashref->{&escape('lasttime:'.$unesc_key)} = $now; 3724: next; 3725: } 3726: } 3727: my @current_items = split(/:/,$hashref->{$key},-1); 3728: shift(@current_items); # remove description 3729: pop(@current_items); # remove last access 3730: my $numcurrent = scalar(@current_items); 3731: if ($numcurrent > 3) { 3732: $numcurrent = 3; 3733: } 3734: my @new_items = split(/:/,$courseinfo,-1); 3735: my $numnew = scalar(@new_items); 3736: if ($numcurrent > 0) { 3737: if ($numnew <= $numcurrent) { # flushcourselogs() from pre 2.2 3738: for (my $j=$numcurrent-$numnew; $j>=0; $j--) { 3739: $courseinfo .= ':'.$current_items[$numcurrent-$j-1]; 3740: } 3741: } 3742: } 3743: $hashref->{$key}=$courseinfo.':'.$now; 3744: } 3745: if (&untie_domain_hash($hashref)) { 3746: &Reply( $client, "ok\n", $userinput); 3747: } else { 3748: &Failure($client, "error: ".($!+0) 3749: ." untie(GDBM) Failed ". 3750: "while attempting courseidput\n", $userinput); 3751: } 3752: } else { 3753: &Failure($client, "error: ".($!+0) 3754: ." tie(GDBM) Failed ". 3755: "while attempting courseidput\n", $userinput); 3756: } 3757: 3758: return 1; 3759: } 3760: &register_handler("courseidput", \&put_course_id_handler, 0, 1, 0); 3761: 3762: sub put_course_id_hash_handler { 3763: my ($cmd, $tail, $client) = @_; 3764: my $userinput = "$cmd:$tail"; 3765: my ($udom,$mode,$what) = split(/:/, $tail,3); 3766: chomp($what); 3767: my $now=time; 3768: my @pairs=split(/\&/,$what); 3769: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT()); 3770: if ($hashref) { 3771: foreach my $pair (@pairs) { 3772: my ($key,$value)=split(/=/,$pair); 3773: my $unesc_key = &unescape($key); 3774: if ($mode ne 'timeonly') { 3775: if (!defined($hashref->{&escape('lasttime:'.$unesc_key)})) { 3776: my $curritems = &Apache::lonnet::thaw_unescape($key); 3777: if (ref($curritems) ne 'HASH') { 3778: my @current_items = split(/:/,$hashref->{$key},-1); 3779: my $lasttime = pop(@current_items); 3780: $hashref->{&escape('lasttime:'.$unesc_key)} = $lasttime; 3781: } else { 3782: $hashref->{&escape('lasttime:'.$unesc_key)} = ''; 3783: } 3784: } 3785: $hashref->{$key} = $value; 3786: } 3787: if ($mode ne 'notime') { 3788: $hashref->{&escape('lasttime:'.$unesc_key)} = $now; 3789: } 3790: } 3791: if (&untie_domain_hash($hashref)) { 3792: &Reply($client, "ok\n", $userinput); 3793: } else { 3794: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". 3795: "while attempting courseidputhash\n", $userinput); 3796: } 3797: } else { 3798: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ". 3799: "while attempting courseidputhash\n", $userinput); 3800: } 3801: return 1; 3802: } 3803: &register_handler("courseidputhash", \&put_course_id_hash_handler, 0, 1, 0); 3804: 3805: # Retrieves the value of a course id resource keyword pattern 3806: # defined since a starting date. Both the starting date and the 3807: # keyword pattern are optional. If the starting date is not supplied it 3808: # is treated as the beginning of time. If the pattern is not found, 3809: # it is treatred as "." matching everything. 3810: # 3811: # Parameters: 3812: # $cmd - Command keyword that resulted in us being dispatched. 3813: # $tail - The remainder of the command that, in this case, consists 3814: # of a colon separated list of: 3815: # domain - The domain in which the course database is 3816: # defined. 3817: # since - Optional parameter describing the minimum 3818: # time of definition(?) of the resources that 3819: # will match the dump. 3820: # description - regular expression that is used to filter 3821: # the dump. Only keywords matching this regexp 3822: # will be used. 3823: # institutional code - optional supplied code to filter 3824: # the dump. Only courses with an institutional code 3825: # that match the supplied code will be returned. 3826: # owner - optional supplied username and domain of owner to 3827: # filter the dump. Only courses for which the course 3828: # owner matches the supplied username and/or domain 3829: # will be returned. Pre-2.2.0 legacy entries from 3830: # nohist_courseiddump will only contain usernames. 3831: # type - optional parameter for selection 3832: # regexp_ok - if 1 or -1 allow the supplied institutional code 3833: # filter to behave as a regular expression: 3834: # 1 will not exclude the course if the instcode matches the RE 3835: # -1 will exclude the course if the instcode matches the RE 3836: # rtn_as_hash - whether to return the information available for 3837: # each matched item as a frozen hash of all 3838: # key, value pairs in the item's hash, or as a 3839: # colon-separated list of (in order) description, 3840: # institutional code, and course owner. 3841: # selfenrollonly - filter by courses allowing self-enrollment 3842: # now or in the future (selfenrollonly = 1). 3843: # catfilter - filter by course category, assigned to a course 3844: # using manually defined categories (i.e., not 3845: # self-cataloging based on on institutional code). 3846: # showhidden - include course in results even if course 3847: # was set to be excluded from course catalog (DC only). 3848: # caller - if set to 'coursecatalog', courses set to be hidden 3849: # from course catalog will be excluded from results (unless 3850: # overridden by "showhidden". 3851: # cloner - escaped username:domain of course cloner (if picking course to 3852: # clone). 3853: # cc_clone_list - escaped comma separated list of courses for which 3854: # course cloner has active CC role (and so can clone 3855: # automatically). 3856: # cloneonly - filter by courses for which cloner has rights to clone. 3857: # createdbefore - include courses for which creation date preceeded this date. 3858: # createdafter - include courses for which creation date followed this date. 3859: # creationcontext - include courses created in specified context 3860: # 3861: # domcloner - flag to indicate if user can create CCs in course's domain. 3862: # If so, ability to clone course is automatic. 3863: # 3864: # $client - The socket open on the client. 3865: # Returns: 3866: # 1 - Continue processing. 3867: # Side Effects: 3868: # a reply is written to $client. 3869: sub dump_course_id_handler { 3870: my ($cmd, $tail, $client) = @_; 3871: my $userinput = "$cmd:$tail"; 3872: 3873: my ($udom,$since,$description,$instcodefilter,$ownerfilter,$coursefilter, 3874: $typefilter,$regexp_ok,$rtn_as_hash,$selfenrollonly,$catfilter,$showhidden, 3875: $caller,$cloner,$cc_clone_list,$cloneonly,$createdbefore,$createdafter, 3876: $creationcontext,$domcloner) =split(/:/,$tail); 3877: my $now = time; 3878: my ($cloneruname,$clonerudom,%cc_clone); 3879: if (defined($description)) { 3880: $description=&unescape($description); 3881: } else { 3882: $description='.'; 3883: } 3884: if (defined($instcodefilter)) { 3885: $instcodefilter=&unescape($instcodefilter); 3886: } else { 3887: $instcodefilter='.'; 3888: } 3889: my ($ownerunamefilter,$ownerdomfilter); 3890: if (defined($ownerfilter)) { 3891: $ownerfilter=&unescape($ownerfilter); 3892: if ($ownerfilter ne '.' && defined($ownerfilter)) { 3893: if ($ownerfilter =~ /^([^:]*):([^:]*)$/) { 3894: $ownerunamefilter = $1; 3895: $ownerdomfilter = $2; 3896: } else { 3897: $ownerunamefilter = $ownerfilter; 3898: $ownerdomfilter = ''; 3899: } 3900: } 3901: } else { 3902: $ownerfilter='.'; 3903: } 3904: 3905: if (defined($coursefilter)) { 3906: $coursefilter=&unescape($coursefilter); 3907: } else { 3908: $coursefilter='.'; 3909: } 3910: if (defined($typefilter)) { 3911: $typefilter=&unescape($typefilter); 3912: } else { 3913: $typefilter='.'; 3914: } 3915: if (defined($regexp_ok)) { 3916: $regexp_ok=&unescape($regexp_ok); 3917: } 3918: if (defined($catfilter)) { 3919: $catfilter=&unescape($catfilter); 3920: } 3921: if (defined($cloner)) { 3922: $cloner = &unescape($cloner); 3923: ($cloneruname,$clonerudom) = ($cloner =~ /^($LONCAPA::match_username):($LONCAPA::match_domain)$/); 3924: } 3925: if (defined($cc_clone_list)) { 3926: $cc_clone_list = &unescape($cc_clone_list); 3927: my @cc_cloners = split('&',$cc_clone_list); 3928: foreach my $cid (@cc_cloners) { 3929: my ($clonedom,$clonenum) = split(':',$cid); 3930: next if ($clonedom ne $udom); 3931: $cc_clone{$clonedom.'_'.$clonenum} = 1; 3932: } 3933: } 3934: if ($createdbefore ne '') { 3935: $createdbefore = &unescape($createdbefore); 3936: } else { 3937: $createdbefore = 0; 3938: } 3939: if ($createdafter ne '') { 3940: $createdafter = &unescape($createdafter); 3941: } else { 3942: $createdafter = 0; 3943: } 3944: if ($creationcontext ne '') { 3945: $creationcontext = &unescape($creationcontext); 3946: } else { 3947: $creationcontext = '.'; 3948: } 3949: my $unpack = 1; 3950: if ($description eq '.' && $instcodefilter eq '.' && $coursefilter eq '.' && 3951: $typefilter eq '.') { 3952: $unpack = 0; 3953: } 3954: if (!defined($since)) { $since=0; } 3955: my $qresult=''; 3956: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT()); 3957: if ($hashref) { 3958: while (my ($key,$value) = each(%$hashref)) { 3959: my ($unesc_key,$lasttime_key,$lasttime,$is_hash,%val, 3960: %unesc_val,$selfenroll_end,$selfenroll_types,$created, 3961: $context); 3962: $unesc_key = &unescape($key); 3963: if ($unesc_key =~ /^lasttime:/) { 3964: next; 3965: } else { 3966: $lasttime_key = &escape('lasttime:'.$unesc_key); 3967: } 3968: if ($hashref->{$lasttime_key} ne '') { 3969: $lasttime = $hashref->{$lasttime_key}; 3970: next if ($lasttime<$since); 3971: } 3972: my ($canclone,$valchange); 3973: my $items = &Apache::lonnet::thaw_unescape($value); 3974: if (ref($items) eq 'HASH') { 3975: if ($hashref->{$lasttime_key} eq '') { 3976: next if ($since > 1); 3977: } 3978: $is_hash = 1; 3979: if ($domcloner) { 3980: $canclone = 1; 3981: } elsif (defined($clonerudom)) { 3982: if ($items->{'cloners'}) { 3983: my @cloneable = split(',',$items->{'cloners'}); 3984: if (@cloneable) { 3985: if (grep(/^\*$/,@cloneable)) { 3986: $canclone = 1; 3987: } elsif (grep(/^\*:\Q$clonerudom\E$/,@cloneable)) { 3988: $canclone = 1; 3989: } elsif (grep(/^\Q$cloneruname\E:\Q$clonerudom\E$/,@cloneable)) { 3990: $canclone = 1; 3991: } 3992: } 3993: unless ($canclone) { 3994: if ($cloneruname ne '' && $clonerudom ne '') { 3995: if ($cc_clone{$unesc_key}) { 3996: $canclone = 1; 3997: $items->{'cloners'} .= ','.$cloneruname.':'. 3998: $clonerudom; 3999: $valchange = 1; 4000: } 4001: } 4002: } 4003: } elsif (defined($cloneruname)) { 4004: if ($cc_clone{$unesc_key}) { 4005: $canclone = 1; 4006: $items->{'cloners'} = $cloneruname.':'.$clonerudom; 4007: $valchange = 1; 4008: } 4009: unless ($canclone) { 4010: if ($items->{'owner'} =~ /:/) { 4011: if ($items->{'owner'} eq $cloner) { 4012: $canclone = 1; 4013: } 4014: } elsif ($cloner eq $items->{'owner'}.':'.$udom) { 4015: $canclone = 1; 4016: } 4017: if ($canclone) { 4018: $items->{'cloners'} = $cloneruname.':'.$clonerudom; 4019: $valchange = 1; 4020: } 4021: } 4022: } 4023: } 4024: if ($unpack || !$rtn_as_hash) { 4025: $unesc_val{'descr'} = $items->{'description'}; 4026: $unesc_val{'inst_code'} = $items->{'inst_code'}; 4027: $unesc_val{'owner'} = $items->{'owner'}; 4028: $unesc_val{'type'} = $items->{'type'}; 4029: $unesc_val{'cloners'} = $items->{'cloners'}; 4030: $unesc_val{'created'} = $items->{'created'}; 4031: $unesc_val{'context'} = $items->{'context'}; 4032: } 4033: $selfenroll_types = $items->{'selfenroll_types'}; 4034: $selfenroll_end = $items->{'selfenroll_end_date'}; 4035: $created = $items->{'created'}; 4036: $context = $items->{'context'}; 4037: if ($selfenrollonly) { 4038: next if (!$selfenroll_types); 4039: if (($selfenroll_end > 0) && ($selfenroll_end <= $now)) { 4040: next; 4041: } 4042: } 4043: if ($creationcontext ne '.') { 4044: next if (($context ne '') && ($context ne $creationcontext)); 4045: } 4046: if ($createdbefore > 0) { 4047: next if (($created eq '') || ($created > $createdbefore)); 4048: } 4049: if ($createdafter > 0) { 4050: next if (($created eq '') || ($created <= $createdafter)); 4051: } 4052: if ($catfilter ne '') { 4053: next if ($items->{'categories'} eq ''); 4054: my @categories = split('&',$items->{'categories'}); 4055: next if (@categories == 0); 4056: my @subcats = split('&',$catfilter); 4057: my $matchcat = 0; 4058: foreach my $cat (@categories) { 4059: if (grep(/^\Q$cat\E$/,@subcats)) { 4060: $matchcat = 1; 4061: last; 4062: } 4063: } 4064: next if (!$matchcat); 4065: } 4066: if ($caller eq 'coursecatalog') { 4067: if ($items->{'hidefromcat'} eq 'yes') { 4068: next if !$showhidden; 4069: } 4070: } 4071: } else { 4072: next if ($catfilter ne ''); 4073: next if ($selfenrollonly); 4074: next if ($createdbefore || $createdafter); 4075: next if ($creationcontext ne '.'); 4076: if ((defined($clonerudom)) && (defined($cloneruname))) { 4077: if ($cc_clone{$unesc_key}) { 4078: $canclone = 1; 4079: $val{'cloners'} = &escape($cloneruname.':'.$clonerudom); 4080: } 4081: } 4082: $is_hash = 0; 4083: my @courseitems = split(/:/,$value); 4084: $lasttime = pop(@courseitems); 4085: if ($hashref->{$lasttime_key} eq '') { 4086: next if ($lasttime<$since); 4087: } 4088: ($val{'descr'},$val{'inst_code'},$val{'owner'},$val{'type'}) = @courseitems; 4089: } 4090: if ($cloneonly) { 4091: next unless ($canclone); 4092: } 4093: my $match = 1; 4094: if ($description ne '.') { 4095: if (!$is_hash) { 4096: $unesc_val{'descr'} = &unescape($val{'descr'}); 4097: } 4098: if (eval{$unesc_val{'descr'} !~ /\Q$description\E/i}) { 4099: $match = 0; 4100: } 4101: } 4102: if ($instcodefilter ne '.') { 4103: if (!$is_hash) { 4104: $unesc_val{'inst_code'} = &unescape($val{'inst_code'}); 4105: } 4106: if ($regexp_ok == 1) { 4107: if (eval{$unesc_val{'inst_code'} !~ /$instcodefilter/}) { 4108: $match = 0; 4109: } 4110: } elsif ($regexp_ok == -1) { 4111: if (eval{$unesc_val{'inst_code'} =~ /$instcodefilter/}) { 4112: $match = 0; 4113: } 4114: } else { 4115: if (eval{$unesc_val{'inst_code'} !~ /\Q$instcodefilter\E/i}) { 4116: $match = 0; 4117: } 4118: } 4119: } 4120: if ($ownerfilter ne '.') { 4121: if (!$is_hash) { 4122: $unesc_val{'owner'} = &unescape($val{'owner'}); 4123: } 4124: if (($ownerunamefilter ne '') && ($ownerdomfilter ne '')) { 4125: if ($unesc_val{'owner'} =~ /:/) { 4126: if (eval{$unesc_val{'owner'} !~ 4127: /\Q$ownerunamefilter\E:\Q$ownerdomfilter\E$/i}) { 4128: $match = 0; 4129: } 4130: } else { 4131: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E/i}) { 4132: $match = 0; 4133: } 4134: } 4135: } elsif ($ownerunamefilter ne '') { 4136: if ($unesc_val{'owner'} =~ /:/) { 4137: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E:[^:]+$/i}) { 4138: $match = 0; 4139: } 4140: } else { 4141: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E/i}) { 4142: $match = 0; 4143: } 4144: } 4145: } elsif ($ownerdomfilter ne '') { 4146: if ($unesc_val{'owner'} =~ /:/) { 4147: if (eval{$unesc_val{'owner'} !~ /^[^:]+:\Q$ownerdomfilter\E/}) { 4148: $match = 0; 4149: } 4150: } else { 4151: if ($ownerdomfilter ne $udom) { 4152: $match = 0; 4153: } 4154: } 4155: } 4156: } 4157: if ($coursefilter ne '.') { 4158: if (eval{$unesc_key !~ /^$udom(_)\Q$coursefilter\E$/}) { 4159: $match = 0; 4160: } 4161: } 4162: if ($typefilter ne '.') { 4163: if (!$is_hash) { 4164: $unesc_val{'type'} = &unescape($val{'type'}); 4165: } 4166: if ($unesc_val{'type'} eq '') { 4167: if ($typefilter ne 'Course') { 4168: $match = 0; 4169: } 4170: } else { 4171: if (eval{$unesc_val{'type'} !~ /^\Q$typefilter\E$/}) { 4172: $match = 0; 4173: } 4174: } 4175: } 4176: if ($match == 1) { 4177: if ($rtn_as_hash) { 4178: if ($is_hash) { 4179: if ($valchange) { 4180: my $newvalue = &Apache::lonnet::freeze_escape($items); 4181: $qresult.=$key.'='.$newvalue.'&'; 4182: } else { 4183: $qresult.=$key.'='.$value.'&'; 4184: } 4185: } else { 4186: my %rtnhash = ( 'description' => &unescape($val{'descr'}), 4187: 'inst_code' => &unescape($val{'inst_code'}), 4188: 'owner' => &unescape($val{'owner'}), 4189: 'type' => &unescape($val{'type'}), 4190: 'cloners' => &unescape($val{'cloners'}), 4191: ); 4192: my $items = &Apache::lonnet::freeze_escape(\%rtnhash); 4193: $qresult.=$key.'='.$items.'&'; 4194: } 4195: } else { 4196: if ($is_hash) { 4197: $qresult .= $key.'='.&escape($unesc_val{'descr'}).':'. 4198: &escape($unesc_val{'inst_code'}).':'. 4199: &escape($unesc_val{'owner'}).'&'; 4200: } else { 4201: $qresult .= $key.'='.$val{'descr'}.':'.$val{'inst_code'}. 4202: ':'.$val{'owner'}.'&'; 4203: } 4204: } 4205: } 4206: } 4207: if (&untie_domain_hash($hashref)) { 4208: chop($qresult); 4209: &Reply($client, \$qresult, $userinput); 4210: } else { 4211: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". 4212: "while attempting courseiddump\n", $userinput); 4213: } 4214: } else { 4215: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ". 4216: "while attempting courseiddump\n", $userinput); 4217: } 4218: return 1; 4219: } 4220: &register_handler("courseiddump", \&dump_course_id_handler, 0, 1, 0); 4221: 4222: sub course_lastaccess_handler { 4223: my ($cmd, $tail, $client) = @_; 4224: my $userinput = "$cmd:$tail"; 4225: my ($cdom,$cnum) = split(':',$tail); 4226: my (%lastaccess,$qresult); 4227: my $hashref = &tie_domain_hash($cdom, "nohist_courseids", &GDBM_WRCREAT()); 4228: if ($hashref) { 4229: while (my ($key,$value) = each(%$hashref)) { 4230: my ($unesc_key,$lasttime); 4231: $unesc_key = &unescape($key); 4232: if ($cnum) { 4233: next unless ($unesc_key =~ /\Q$cdom\E_\Q$cnum\E$/); 4234: } 4235: if ($unesc_key =~ /^lasttime:($LONCAPA::match_domain\_$LONCAPA::match_courseid)/) { 4236: $lastaccess{$1} = $value; 4237: } else { 4238: my $items = &Apache::lonnet::thaw_unescape($value); 4239: if (ref($items) eq 'HASH') { 4240: unless ($lastaccess{$unesc_key}) { 4241: $lastaccess{$unesc_key} = ''; 4242: } 4243: } else { 4244: my @courseitems = split(':',$value); 4245: $lastaccess{$unesc_key} = pop(@courseitems); 4246: } 4247: } 4248: } 4249: foreach my $cid (sort(keys(%lastaccess))) { 4250: $qresult.=&escape($cid).'='.$lastaccess{$cid}.'&'; 4251: } 4252: if (&untie_domain_hash($hashref)) { 4253: if ($qresult) { 4254: chop($qresult); 4255: } 4256: &Reply($client, \$qresult, $userinput); 4257: } else { 4258: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". 4259: "while attempting lastacourseaccess\n", $userinput); 4260: } 4261: } else { 4262: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ". 4263: "while attempting lastcourseaccess\n", $userinput); 4264: } 4265: return 1; 4266: } 4267: &register_handler("courselastaccess",\&course_lastaccess_handler, 0, 1, 0); 4268: 4269: # 4270: # Puts an unencrypted entry in a namespace db file at the domain level 4271: # 4272: # Parameters: 4273: # $cmd - The command that got us here. 4274: # $tail - Tail of the command (remaining parameters). 4275: # $client - File descriptor connected to client. 4276: # Returns 4277: # 0 - Requested to exit, caller should shut down. 4278: # 1 - Continue processing. 4279: # Side effects: 4280: # reply is written to $client. 4281: # 4282: sub put_domain_handler { 4283: my ($cmd,$tail,$client) = @_; 4284: 4285: my $userinput = "$cmd:$tail"; 4286: 4287: my ($udom,$namespace,$what) =split(/:/,$tail,3); 4288: chomp($what); 4289: my @pairs=split(/\&/,$what); 4290: my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_WRCREAT(), 4291: "P", $what); 4292: if ($hashref) { 4293: foreach my $pair (@pairs) { 4294: my ($key,$value)=split(/=/,$pair); 4295: $hashref->{$key}=$value; 4296: } 4297: if (&untie_domain_hash($hashref)) { 4298: &Reply($client, "ok\n", $userinput); 4299: } else { 4300: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". 4301: "while attempting putdom\n", $userinput); 4302: } 4303: } else { 4304: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ". 4305: "while attempting putdom\n", $userinput); 4306: } 4307: 4308: return 1; 4309: } 4310: &register_handler("putdom", \&put_domain_handler, 0, 1, 0); 4311: 4312: # Unencrypted get from the namespace database file at the domain level. 4313: # This function retrieves a keyed item from a specific named database in the 4314: # domain directory. 4315: # 4316: # Parameters: 4317: # $cmd - Command request keyword (get). 4318: # $tail - Tail of the command. This is a colon separated list 4319: # consisting of the domain and the 'namespace' 4320: # which selects the gdbm file to do the lookup in, 4321: # & separated list of keys to lookup. Note that 4322: # the values are returned as an & separated list too. 4323: # $client - File descriptor open on the client. 4324: # Returns: 4325: # 1 - Continue processing. 4326: # 0 - Exit. 4327: # Side effects: 4328: # reply is written to $client. 4329: # 4330: 4331: sub get_domain_handler { 4332: my ($cmd, $tail, $client) = @_; 4333: 4334: 4335: my $userinput = "$client:$tail"; 4336: 4337: my ($udom,$namespace,$what)=split(/:/,$tail,3); 4338: chomp($what); 4339: my @queries=split(/\&/,$what); 4340: my $qresult=''; 4341: my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_READER()); 4342: if ($hashref) { 4343: for (my $i=0;$i<=$#queries;$i++) { 4344: $qresult.="$hashref->{$queries[$i]}&"; 4345: } 4346: if (&untie_domain_hash($hashref)) { 4347: $qresult=~s/\&$//; 4348: &Reply($client, \$qresult, $userinput); 4349: } else { 4350: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ". 4351: "while attempting getdom\n",$userinput); 4352: } 4353: } else { 4354: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ". 4355: "while attempting getdom\n",$userinput); 4356: } 4357: 4358: return 1; 4359: } 4360: &register_handler("getdom", \&get_domain_handler, 0, 1, 0); 4361: 4362: # 4363: # Puts an id to a domains id database. 4364: # 4365: # Parameters: 4366: # $cmd - The command that triggered us. 4367: # $tail - Remainder of the request other than the command. This is a 4368: # colon separated list containing: 4369: # $domain - The domain for which we are writing the id. 4370: # $pairs - The id info to write... this is and & separated list 4371: # of keyword=value. 4372: # $client - Socket open on the client. 4373: # Returns: 4374: # 1 - Continue processing. 4375: # Side effects: 4376: # reply is written to $client. 4377: # 4378: sub put_id_handler { 4379: my ($cmd,$tail,$client) = @_; 4380: 4381: 4382: my $userinput = "$cmd:$tail"; 4383: 4384: my ($udom,$what)=split(/:/,$tail); 4385: chomp($what); 4386: my @pairs=split(/\&/,$what); 4387: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_WRCREAT(), 4388: "P", $what); 4389: if ($hashref) { 4390: foreach my $pair (@pairs) { 4391: my ($key,$value)=split(/=/,$pair); 4392: $hashref->{$key}=$value; 4393: } 4394: if (&untie_domain_hash($hashref)) { 4395: &Reply($client, "ok\n", $userinput); 4396: } else { 4397: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". 4398: "while attempting idput\n", $userinput); 4399: } 4400: } else { 4401: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ". 4402: "while attempting idput\n", $userinput); 4403: } 4404: 4405: return 1; 4406: } 4407: &register_handler("idput", \&put_id_handler, 0, 1, 0); 4408: 4409: # 4410: # Retrieves a set of id values from the id database. 4411: # Returns an & separated list of results, one for each requested id to the 4412: # client. 4413: # 4414: # Parameters: 4415: # $cmd - Command keyword that caused us to be dispatched. 4416: # $tail - Tail of the command. Consists of a colon separated: 4417: # domain - the domain whose id table we dump 4418: # ids Consists of an & separated list of 4419: # id keywords whose values will be fetched. 4420: # nonexisting keywords will have an empty value. 4421: # $client - Socket open on the client. 4422: # 4423: # Returns: 4424: # 1 - indicating processing should continue. 4425: # Side effects: 4426: # An & separated list of results is written to $client. 4427: # 4428: sub get_id_handler { 4429: my ($cmd, $tail, $client) = @_; 4430: 4431: 4432: my $userinput = "$client:$tail"; 4433: 4434: my ($udom,$what)=split(/:/,$tail); 4435: chomp($what); 4436: my @queries=split(/\&/,$what); 4437: my $qresult=''; 4438: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_READER()); 4439: if ($hashref) { 4440: for (my $i=0;$i<=$#queries;$i++) { 4441: $qresult.="$hashref->{$queries[$i]}&"; 4442: } 4443: if (&untie_domain_hash($hashref)) { 4444: $qresult=~s/\&$//; 4445: &Reply($client, \$qresult, $userinput); 4446: } else { 4447: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ". 4448: "while attempting idget\n",$userinput); 4449: } 4450: } else { 4451: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ". 4452: "while attempting idget\n",$userinput); 4453: } 4454: 4455: return 1; 4456: } 4457: &register_handler("idget", \&get_id_handler, 0, 1, 0); 4458: 4459: # 4460: # Puts broadcast e-mail sent by Domain Coordinator in nohist_dcmail database 4461: # 4462: # Parameters 4463: # $cmd - Command keyword that caused us to be dispatched. 4464: # $tail - Tail of the command. Consists of a colon separated: 4465: # domain - the domain whose dcmail we are recording 4466: # email Consists of key=value pair 4467: # where key is unique msgid 4468: # and value is message (in XML) 4469: # $client - Socket open on the client. 4470: # 4471: # Returns: 4472: # 1 - indicating processing should continue. 4473: # Side effects 4474: # reply is written to $client. 4475: # 4476: sub put_dcmail_handler { 4477: my ($cmd,$tail,$client) = @_; 4478: my $userinput = "$cmd:$tail"; 4479: 4480: 4481: my ($udom,$what)=split(/:/,$tail); 4482: chomp($what); 4483: my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT()); 4484: if ($hashref) { 4485: my ($key,$value)=split(/=/,$what); 4486: $hashref->{$key}=$value; 4487: } 4488: if (&untie_domain_hash($hashref)) { 4489: &Reply($client, "ok\n", $userinput); 4490: } else { 4491: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". 4492: "while attempting dcmailput\n", $userinput); 4493: } 4494: return 1; 4495: } 4496: &register_handler("dcmailput", \&put_dcmail_handler, 0, 1, 0); 4497: 4498: # 4499: # Retrieves broadcast e-mail from nohist_dcmail database 4500: # Returns to client an & separated list of key=value pairs, 4501: # where key is msgid and value is message information. 4502: # 4503: # Parameters 4504: # $cmd - Command keyword that caused us to be dispatched. 4505: # $tail - Tail of the command. Consists of a colon separated: 4506: # domain - the domain whose dcmail table we dump 4507: # startfilter - beginning of time window 4508: # endfilter - end of time window 4509: # sendersfilter - & separated list of username:domain 4510: # for senders to search for. 4511: # $client - Socket open on the client. 4512: # 4513: # Returns: 4514: # 1 - indicating processing should continue. 4515: # Side effects 4516: # reply (& separated list of msgid=messageinfo pairs) is 4517: # written to $client. 4518: # 4519: sub dump_dcmail_handler { 4520: my ($cmd, $tail, $client) = @_; 4521: 4522: my $userinput = "$cmd:$tail"; 4523: my ($udom,$startfilter,$endfilter,$sendersfilter) = split(/:/,$tail); 4524: chomp($sendersfilter); 4525: my @senders = (); 4526: if (defined($startfilter)) { 4527: $startfilter=&unescape($startfilter); 4528: } else { 4529: $startfilter='.'; 4530: } 4531: if (defined($endfilter)) { 4532: $endfilter=&unescape($endfilter); 4533: } else { 4534: $endfilter='.'; 4535: } 4536: if (defined($sendersfilter)) { 4537: $sendersfilter=&unescape($sendersfilter); 4538: @senders = map { &unescape($_) } split(/\&/,$sendersfilter); 4539: } 4540: 4541: my $qresult=''; 4542: my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT()); 4543: if ($hashref) { 4544: while (my ($key,$value) = each(%$hashref)) { 4545: my $match = 1; 4546: my ($timestamp,$subj,$uname,$udom) = 4547: split(/:/,&unescape(&unescape($key)),5); # yes, twice really 4548: $subj = &unescape($subj); 4549: unless ($startfilter eq '.' || !defined($startfilter)) { 4550: if ($timestamp < $startfilter) { 4551: $match = 0; 4552: } 4553: } 4554: unless ($endfilter eq '.' || !defined($endfilter)) { 4555: if ($timestamp > $endfilter) { 4556: $match = 0; 4557: } 4558: } 4559: unless (@senders < 1) { 4560: unless (grep/^$uname:$udom$/,@senders) { 4561: $match = 0; 4562: } 4563: } 4564: if ($match == 1) { 4565: $qresult.=$key.'='.$value.'&'; 4566: } 4567: } 4568: if (&untie_domain_hash($hashref)) { 4569: chop($qresult); 4570: &Reply($client, \$qresult, $userinput); 4571: } else { 4572: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". 4573: "while attempting dcmaildump\n", $userinput); 4574: } 4575: } else { 4576: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ". 4577: "while attempting dcmaildump\n", $userinput); 4578: } 4579: return 1; 4580: } 4581: 4582: &register_handler("dcmaildump", \&dump_dcmail_handler, 0, 1, 0); 4583: 4584: # 4585: # Puts domain roles in nohist_domainroles database 4586: # 4587: # Parameters 4588: # $cmd - Command keyword that caused us to be dispatched. 4589: # $tail - Tail of the command. Consists of a colon separated: 4590: # domain - the domain whose roles we are recording 4591: # role - Consists of key=value pair 4592: # where key is unique role 4593: # and value is start/end date information 4594: # $client - Socket open on the client. 4595: # 4596: # Returns: 4597: # 1 - indicating processing should continue. 4598: # Side effects 4599: # reply is written to $client. 4600: # 4601: 4602: sub put_domainroles_handler { 4603: my ($cmd,$tail,$client) = @_; 4604: 4605: my $userinput = "$cmd:$tail"; 4606: my ($udom,$what)=split(/:/,$tail); 4607: chomp($what); 4608: my @pairs=split(/\&/,$what); 4609: my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT()); 4610: if ($hashref) { 4611: foreach my $pair (@pairs) { 4612: my ($key,$value)=split(/=/,$pair); 4613: $hashref->{$key}=$value; 4614: } 4615: if (&untie_domain_hash($hashref)) { 4616: &Reply($client, "ok\n", $userinput); 4617: } else { 4618: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". 4619: "while attempting domroleput\n", $userinput); 4620: } 4621: } else { 4622: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ". 4623: "while attempting domroleput\n", $userinput); 4624: } 4625: 4626: return 1; 4627: } 4628: 4629: &register_handler("domroleput", \&put_domainroles_handler, 0, 1, 0); 4630: 4631: # 4632: # Retrieves domain roles from nohist_domainroles database 4633: # Returns to client an & separated list of key=value pairs, 4634: # where key is role and value is start and end date information. 4635: # 4636: # Parameters 4637: # $cmd - Command keyword that caused us to be dispatched. 4638: # $tail - Tail of the command. Consists of a colon separated: 4639: # domain - the domain whose domain roles table we dump 4640: # $client - Socket open on the client. 4641: # 4642: # Returns: 4643: # 1 - indicating processing should continue. 4644: # Side effects 4645: # reply (& separated list of role=start/end info pairs) is 4646: # written to $client. 4647: # 4648: sub dump_domainroles_handler { 4649: my ($cmd, $tail, $client) = @_; 4650: 4651: my $userinput = "$cmd:$tail"; 4652: my ($udom,$startfilter,$endfilter,$rolesfilter) = split(/:/,$tail); 4653: chomp($rolesfilter); 4654: my @roles = (); 4655: if (defined($startfilter)) { 4656: $startfilter=&unescape($startfilter); 4657: } else { 4658: $startfilter='.'; 4659: } 4660: if (defined($endfilter)) { 4661: $endfilter=&unescape($endfilter); 4662: } else { 4663: $endfilter='.'; 4664: } 4665: if (defined($rolesfilter)) { 4666: $rolesfilter=&unescape($rolesfilter); 4667: @roles = split(/\&/,$rolesfilter); 4668: } 4669: 4670: my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT()); 4671: if ($hashref) { 4672: my $qresult = ''; 4673: while (my ($key,$value) = each(%$hashref)) { 4674: my $match = 1; 4675: my ($end,$start) = split(/:/,&unescape($value)); 4676: my ($trole,$uname,$udom,$runame,$rudom,$rsec) = split(/:/,&unescape($key)); 4677: unless (@roles < 1) { 4678: unless (grep/^\Q$trole\E$/,@roles) { 4679: $match = 0; 4680: next; 4681: } 4682: } 4683: unless ($startfilter eq '.' || !defined($startfilter)) { 4684: if ((defined($start)) && ($start >= $startfilter)) { 4685: $match = 0; 4686: next; 4687: } 4688: } 4689: unless ($endfilter eq '.' || !defined($endfilter)) { 4690: if ((defined($end)) && (($end > 0) && ($end <= $endfilter))) { 4691: $match = 0; 4692: next; 4693: } 4694: } 4695: if ($match == 1) { 4696: $qresult.=$key.'='.$value.'&'; 4697: } 4698: } 4699: if (&untie_domain_hash($hashref)) { 4700: chop($qresult); 4701: &Reply($client, \$qresult, $userinput); 4702: } else { 4703: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". 4704: "while attempting domrolesdump\n", $userinput); 4705: } 4706: } else { 4707: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ". 4708: "while attempting domrolesdump\n", $userinput); 4709: } 4710: return 1; 4711: } 4712: 4713: &register_handler("domrolesdump", \&dump_domainroles_handler, 0, 1, 0); 4714: 4715: 4716: # Process the tmpput command I'm not sure what this does.. Seems to 4717: # create a file in the lonDaemons/tmp directory of the form $id.tmp 4718: # where Id is the client's ip concatenated with a sequence number. 4719: # The file will contain some value that is passed in. Is this e.g. 4720: # a login token? 4721: # 4722: # Parameters: 4723: # $cmd - The command that got us dispatched. 4724: # $tail - The remainder of the request following $cmd: 4725: # In this case this will be the contents of the file. 4726: # $client - Socket connected to the client. 4727: # Returns: 4728: # 1 indicating processing can continue. 4729: # Side effects: 4730: # A file is created in the local filesystem. 4731: # A reply is sent to the client. 4732: sub tmp_put_handler { 4733: my ($cmd, $what, $client) = @_; 4734: 4735: my $userinput = "$cmd:$what"; # Reconstruct for logging. 4736: 4737: my ($record,$context) = split(/:/,$what); 4738: if ($context ne '') { 4739: chomp($context); 4740: $context = &unescape($context); 4741: } 4742: my ($id,$store); 4743: $tmpsnum++; 4744: if (($context eq 'resetpw') || ($context eq 'createaccount')) { 4745: $id = &md5_hex(&md5_hex(time.{}.rand().$$)); 4746: } else { 4747: $id = $$.'_'.$clientip.'_'.$tmpsnum; 4748: } 4749: $id=~s/\W/\_/g; 4750: $record=~s/\n//g; 4751: my $execdir=$perlvar{'lonDaemons'}; 4752: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) { 4753: print $store $record; 4754: close $store; 4755: &Reply($client, \$id, $userinput); 4756: } else { 4757: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ". 4758: "while attempting tmpput\n", $userinput); 4759: } 4760: return 1; 4761: 4762: } 4763: &register_handler("tmpput", \&tmp_put_handler, 0, 1, 0); 4764: 4765: # Processes the tmpget command. This command returns the contents 4766: # of a temporary resource file(?) created via tmpput. 4767: # 4768: # Paramters: 4769: # $cmd - Command that got us dispatched. 4770: # $id - Tail of the command, contain the id of the resource 4771: # we want to fetch. 4772: # $client - socket open on the client. 4773: # Return: 4774: # 1 - Inidcating processing can continue. 4775: # Side effects: 4776: # A reply is sent to the client. 4777: # 4778: sub tmp_get_handler { 4779: my ($cmd, $id, $client) = @_; 4780: 4781: my $userinput = "$cmd:$id"; 4782: 4783: 4784: $id=~s/\W/\_/g; 4785: my $store; 4786: my $execdir=$perlvar{'lonDaemons'}; 4787: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) { 4788: my $reply=<$store>; 4789: &Reply( $client, \$reply, $userinput); 4790: close $store; 4791: } else { 4792: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ". 4793: "while attempting tmpget\n", $userinput); 4794: } 4795: 4796: return 1; 4797: } 4798: &register_handler("tmpget", \&tmp_get_handler, 0, 1, 0); 4799: 4800: # 4801: # Process the tmpdel command. This command deletes a temp resource 4802: # created by the tmpput command. 4803: # 4804: # Parameters: 4805: # $cmd - Command that got us here. 4806: # $id - Id of the temporary resource created. 4807: # $client - socket open on the client process. 4808: # 4809: # Returns: 4810: # 1 - Indicating processing should continue. 4811: # Side Effects: 4812: # A file is deleted 4813: # A reply is sent to the client. 4814: sub tmp_del_handler { 4815: my ($cmd, $id, $client) = @_; 4816: 4817: my $userinput= "$cmd:$id"; 4818: 4819: chomp($id); 4820: $id=~s/\W/\_/g; 4821: my $execdir=$perlvar{'lonDaemons'}; 4822: if (unlink("$execdir/tmp/$id.tmp")) { 4823: &Reply($client, "ok\n", $userinput); 4824: } else { 4825: &Failure( $client, "error: ".($!+0)."Unlink tmp Failed ". 4826: "while attempting tmpdel\n", $userinput); 4827: } 4828: 4829: return 1; 4830: 4831: } 4832: &register_handler("tmpdel", \&tmp_del_handler, 0, 1, 0); 4833: 4834: # 4835: # Processes the setannounce command. This command 4836: # creates a file named announce.txt in the top directory of 4837: # the documentn root and sets its contents. The announce.txt file is 4838: # printed in its entirety at the LonCAPA login page. Note: 4839: # once the announcement.txt fileis created it cannot be deleted. 4840: # However, setting the contents of the file to empty removes the 4841: # announcement from the login page of loncapa so who cares. 4842: # 4843: # Parameters: 4844: # $cmd - The command that got us dispatched. 4845: # $announcement - The text of the announcement. 4846: # $client - Socket open on the client process. 4847: # Retunrns: 4848: # 1 - Indicating request processing should continue 4849: # Side Effects: 4850: # The file {DocRoot}/announcement.txt is created. 4851: # A reply is sent to $client. 4852: # 4853: sub set_announce_handler { 4854: my ($cmd, $announcement, $client) = @_; 4855: 4856: my $userinput = "$cmd:$announcement"; 4857: 4858: chomp($announcement); 4859: $announcement=&unescape($announcement); 4860: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}. 4861: '/announcement.txt')) { 4862: print $store $announcement; 4863: close $store; 4864: &Reply($client, "ok\n", $userinput); 4865: } else { 4866: &Failure($client, "error: ".($!+0)."\n", $userinput); 4867: } 4868: 4869: return 1; 4870: } 4871: &register_handler("setannounce", \&set_announce_handler, 0, 1, 0); 4872: 4873: # 4874: # Return the version of the daemon. This can be used to determine 4875: # the compatibility of cross version installations or, alternatively to 4876: # simply know who's out of date and who isn't. Note that the version 4877: # is returned concatenated with the tail. 4878: # Parameters: 4879: # $cmd - the request that dispatched to us. 4880: # $tail - Tail of the request (client's version?). 4881: # $client - Socket open on the client. 4882: #Returns: 4883: # 1 - continue processing requests. 4884: # Side Effects: 4885: # Replies with version to $client. 4886: sub get_version_handler { 4887: my ($cmd, $tail, $client) = @_; 4888: 4889: my $userinput = $cmd.$tail; 4890: 4891: &Reply($client, &version($userinput)."\n", $userinput); 4892: 4893: 4894: return 1; 4895: } 4896: &register_handler("version", \&get_version_handler, 0, 1, 0); 4897: 4898: # Set the current host and domain. This is used to support 4899: # multihomed systems. Each IP of the system, or even separate daemons 4900: # on the same IP can be treated as handling a separate lonCAPA virtual 4901: # machine. This command selects the virtual lonCAPA. The client always 4902: # knows the right one since it is lonc and it is selecting the domain/system 4903: # from the hosts.tab file. 4904: # Parameters: 4905: # $cmd - Command that dispatched us. 4906: # $tail - Tail of the command (domain/host requested). 4907: # $socket - Socket open on the client. 4908: # 4909: # Returns: 4910: # 1 - Indicates the program should continue to process requests. 4911: # Side-effects: 4912: # The default domain/system context is modified for this daemon. 4913: # a reply is sent to the client. 4914: # 4915: sub set_virtual_host_handler { 4916: my ($cmd, $tail, $socket) = @_; 4917: 4918: my $userinput ="$cmd:$tail"; 4919: 4920: &Reply($client, &sethost($userinput)."\n", $userinput); 4921: 4922: 4923: return 1; 4924: } 4925: &register_handler("sethost", \&set_virtual_host_handler, 0, 1, 0); 4926: 4927: # Process a request to exit: 4928: # - "bye" is sent to the client. 4929: # - The client socket is shutdown and closed. 4930: # - We indicate to the caller that we should exit. 4931: # Formal Parameters: 4932: # $cmd - The command that got us here. 4933: # $tail - Tail of the command (empty). 4934: # $client - Socket open on the tail. 4935: # Returns: 4936: # 0 - Indicating the program should exit!! 4937: # 4938: sub exit_handler { 4939: my ($cmd, $tail, $client) = @_; 4940: 4941: my $userinput = "$cmd:$tail"; 4942: 4943: &logthis("Client $clientip ($clientname) hanging up: $userinput"); 4944: &Reply($client, "bye\n", $userinput); 4945: $client->shutdown(2); # shutdown the socket forcibly. 4946: $client->close(); 4947: 4948: return 0; 4949: } 4950: &register_handler("exit", \&exit_handler, 0,1,1); 4951: &register_handler("init", \&exit_handler, 0,1,1); 4952: &register_handler("quit", \&exit_handler, 0,1,1); 4953: 4954: # Determine if auto-enrollment is enabled. 4955: # Note that the original had what I believe to be a defect. 4956: # The original returned 0 if the requestor was not a registerd client. 4957: # It should return "refused". 4958: # Formal Parameters: 4959: # $cmd - The command that invoked us. 4960: # $tail - The tail of the command (Extra command parameters. 4961: # $client - The socket open on the client that issued the request. 4962: # Returns: 4963: # 1 - Indicating processing should continue. 4964: # 4965: sub enrollment_enabled_handler { 4966: my ($cmd, $tail, $client) = @_; 4967: my $userinput = $cmd.":".$tail; # For logging purposes. 4968: 4969: 4970: my ($cdom) = split(/:/, $tail, 2); # Domain we're asking about. 4971: 4972: my $outcome = &localenroll::run($cdom); 4973: &Reply($client, \$outcome, $userinput); 4974: 4975: return 1; 4976: } 4977: &register_handler("autorun", \&enrollment_enabled_handler, 0, 1, 0); 4978: 4979: # 4980: # Validate an institutional code used for a LON-CAPA course. 4981: # 4982: # Formal Parameters: 4983: # $cmd - The command request that got us dispatched. 4984: # $tail - The tail of the command. In this case, 4985: # this is a colon separated set of words that will be split 4986: # into: 4987: # $dom - The domain for which the check of 4988: # institutional course code will occur. 4989: # 4990: # $instcode - The institutional code for the course 4991: # being requested, or validated for rights 4992: # to request. 4993: # 4994: # $owner - The course requestor (who will be the 4995: # course owner, in the form username:domain 4996: # 4997: # $client - Socket open on the client. 4998: # Returns: 4999: # 1 - Indicating processing should continue. 5000: # 5001: sub validate_instcode_handler { 5002: my ($cmd, $tail, $client) = @_; 5003: my $userinput = "$cmd:$tail"; 5004: my ($dom,$instcode,$owner) = split(/:/, $tail); 5005: $instcode = &unescape($instcode); 5006: $owner = &unescape($owner); 5007: my ($outcome,$description) = 5008: &localenroll::validate_instcode($dom,$instcode,$owner); 5009: my $result = &escape($outcome).'&'.&escape($description); 5010: &Reply($client, \$result, $userinput); 5011: 5012: return 1; 5013: } 5014: &register_handler("autovalidateinstcode", \&validate_instcode_handler, 0, 1, 0); 5015: 5016: # Get the official sections for which auto-enrollment is possible. 5017: # Since the admin people won't know about 'unofficial sections' 5018: # we cannot auto-enroll on them. 5019: # Formal Parameters: 5020: # $cmd - The command request that got us dispatched here. 5021: # $tail - The remainder of the request. In our case this 5022: # will be split into: 5023: # $coursecode - The course name from the admin point of view. 5024: # $cdom - The course's domain(?). 5025: # $client - Socket open on the client. 5026: # Returns: 5027: # 1 - Indiciting processing should continue. 5028: # 5029: sub get_sections_handler { 5030: my ($cmd, $tail, $client) = @_; 5031: my $userinput = "$cmd:$tail"; 5032: 5033: my ($coursecode, $cdom) = split(/:/, $tail); 5034: my @secs = &localenroll::get_sections($coursecode,$cdom); 5035: my $seclist = &escape(join(':',@secs)); 5036: 5037: &Reply($client, \$seclist, $userinput); 5038: 5039: 5040: return 1; 5041: } 5042: &register_handler("autogetsections", \&get_sections_handler, 0, 1, 0); 5043: 5044: # Validate the owner of a new course section. 5045: # 5046: # Formal Parameters: 5047: # $cmd - Command that got us dispatched. 5048: # $tail - the remainder of the command. For us this consists of a 5049: # colon separated string containing: 5050: # $inst - Course Id from the institutions point of view. 5051: # $owner - Proposed owner of the course. 5052: # $cdom - Domain of the course (from the institutions 5053: # point of view?).. 5054: # $client - Socket open on the client. 5055: # 5056: # Returns: 5057: # 1 - Processing should continue. 5058: # 5059: sub validate_course_owner_handler { 5060: my ($cmd, $tail, $client) = @_; 5061: my $userinput = "$cmd:$tail"; 5062: my ($inst_course_id, $owner, $cdom, $coowners) = split(/:/, $tail); 5063: 5064: $owner = &unescape($owner); 5065: $coowners = &unescape($coowners); 5066: my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom,$coowners); 5067: &Reply($client, \$outcome, $userinput); 5068: 5069: 5070: 5071: return 1; 5072: } 5073: &register_handler("autonewcourse", \&validate_course_owner_handler, 0, 1, 0); 5074: 5075: # 5076: # Validate a course section in the official schedule of classes 5077: # from the institutions point of view (part of autoenrollment). 5078: # 5079: # Formal Parameters: 5080: # $cmd - The command request that got us dispatched. 5081: # $tail - The tail of the command. In this case, 5082: # this is a colon separated set of words that will be split 5083: # into: 5084: # $inst_course_id - The course/section id from the 5085: # institutions point of view. 5086: # $cdom - The domain from the institutions 5087: # point of view. 5088: # $client - Socket open on the client. 5089: # Returns: 5090: # 1 - Indicating processing should continue. 5091: # 5092: sub validate_course_section_handler { 5093: my ($cmd, $tail, $client) = @_; 5094: my $userinput = "$cmd:$tail"; 5095: my ($inst_course_id, $cdom) = split(/:/, $tail); 5096: 5097: my $outcome=&localenroll::validate_courseID($inst_course_id,$cdom); 5098: &Reply($client, \$outcome, $userinput); 5099: 5100: 5101: return 1; 5102: } 5103: &register_handler("autovalidatecourse", \&validate_course_section_handler, 0, 1, 0); 5104: 5105: # 5106: # Validate course owner's access to enrollment data for specific class section. 5107: # 5108: # 5109: # Formal Parameters: 5110: # $cmd - The command request that got us dispatched. 5111: # $tail - The tail of the command. In this case this is a colon separated 5112: # set of words that will be split into: 5113: # $inst_class - Institutional code for the specific class section 5114: # $courseowner - The escaped username:domain of the course owner 5115: # $cdom - The domain of the course from the institution's 5116: # point of view. 5117: # $client - The socket open on the client. 5118: # Returns: 5119: # 1 - continue processing. 5120: # 5121: 5122: sub validate_class_access_handler { 5123: my ($cmd, $tail, $client) = @_; 5124: my $userinput = "$cmd:$tail"; 5125: my ($inst_class,$ownerlist,$cdom) = split(/:/, $tail); 5126: my $owners = &unescape($ownerlist); 5127: my $outcome; 5128: eval { 5129: local($SIG{__DIE__})='DEFAULT'; 5130: $outcome=&localenroll::check_section($inst_class,$owners,$cdom); 5131: }; 5132: &Reply($client,\$outcome, $userinput); 5133: 5134: return 1; 5135: } 5136: &register_handler("autovalidateclass_sec", \&validate_class_access_handler, 0, 1, 0); 5137: 5138: # 5139: # Create a password for a new LON-CAPA user added by auto-enrollment. 5140: # Only used for case where authentication method for new user is localauth 5141: # 5142: # Formal Parameters: 5143: # $cmd - The command request that got us dispatched. 5144: # $tail - The tail of the command. In this case this is a colon separated 5145: # set of words that will be split into: 5146: # $authparam - An authentication parameter (localauth parameter). 5147: # $cdom - The domain of the course from the institution's 5148: # point of view. 5149: # $client - The socket open on the client. 5150: # Returns: 5151: # 1 - continue processing. 5152: # 5153: sub create_auto_enroll_password_handler { 5154: my ($cmd, $tail, $client) = @_; 5155: my $userinput = "$cmd:$tail"; 5156: 5157: my ($authparam, $cdom) = split(/:/, $userinput); 5158: 5159: my ($create_passwd,$authchk); 5160: ($authparam, 5161: $create_passwd, 5162: $authchk) = &localenroll::create_password($authparam,$cdom); 5163: 5164: &Reply($client, &escape($authparam.':'.$create_passwd.':'.$authchk)."\n", 5165: $userinput); 5166: 5167: 5168: return 1; 5169: } 5170: &register_handler("autocreatepassword", \&create_auto_enroll_password_handler, 5171: 0, 1, 0); 5172: 5173: # Retrieve and remove temporary files created by/during autoenrollment. 5174: # 5175: # Formal Parameters: 5176: # $cmd - The command that got us dispatched. 5177: # $tail - The tail of the command. In our case this is a colon 5178: # separated list that will be split into: 5179: # $filename - The name of the file to remove. 5180: # The filename is given as a path relative to 5181: # the LonCAPA temp file directory. 5182: # $client - Socket open on the client. 5183: # 5184: # Returns: 5185: # 1 - Continue processing. 5186: sub retrieve_auto_file_handler { 5187: my ($cmd, $tail, $client) = @_; 5188: my $userinput = "cmd:$tail"; 5189: 5190: my ($filename) = split(/:/, $tail); 5191: 5192: my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename; 5193: if ( (-e $source) && ($filename ne '') ) { 5194: my $reply = ''; 5195: if (open(my $fh,$source)) { 5196: while (<$fh>) { 5197: chomp($_); 5198: $_ =~ s/^\s+//g; 5199: $_ =~ s/\s+$//g; 5200: $reply .= $_; 5201: } 5202: close($fh); 5203: &Reply($client, &escape($reply)."\n", $userinput); 5204: 5205: # Does this have to be uncommented??!? (RF). 5206: # 5207: # unlink($source); 5208: } else { 5209: &Failure($client, "error\n", $userinput); 5210: } 5211: } else { 5212: &Failure($client, "error\n", $userinput); 5213: } 5214: 5215: 5216: return 1; 5217: } 5218: &register_handler("autoretrieve", \&retrieve_auto_file_handler, 0,1,0); 5219: 5220: sub crsreq_checks_handler { 5221: my ($cmd, $tail, $client) = @_; 5222: my $userinput = "$cmd:$tail"; 5223: my $dom = $tail; 5224: my $result; 5225: my @reqtypes = ('official','unofficial','community'); 5226: eval { 5227: local($SIG{__DIE__})='DEFAULT'; 5228: my %validations; 5229: my $response = &localenroll::crsreq_checks($dom,\@reqtypes, 5230: \%validations); 5231: if ($response eq 'ok') { 5232: foreach my $key (keys(%validations)) { 5233: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($validations{$key}).'&'; 5234: } 5235: $result =~ s/\&$//; 5236: } else { 5237: $result = 'error'; 5238: } 5239: }; 5240: if (!$@) { 5241: &Reply($client, \$result, $userinput); 5242: } else { 5243: &Failure($client,"unknown_cmd\n",$userinput); 5244: } 5245: return 1; 5246: } 5247: &register_handler("autocrsreqchecks", \&crsreq_checks_handler, 0, 1, 0); 5248: 5249: sub validate_crsreq_handler { 5250: my ($cmd, $tail, $client) = @_; 5251: my $userinput = "$cmd:$tail"; 5252: my ($dom,$owner,$crstype,$inststatuslist,$instcode,$instseclist) = split(/:/, $tail); 5253: $instcode = &unescape($instcode); 5254: $owner = &unescape($owner); 5255: $crstype = &unescape($crstype); 5256: $inststatuslist = &unescape($inststatuslist); 5257: $instcode = &unescape($instcode); 5258: $instseclist = &unescape($instseclist); 5259: my $outcome; 5260: eval { 5261: local($SIG{__DIE__})='DEFAULT'; 5262: $outcome = &localenroll::validate_crsreq($dom,$owner,$crstype, 5263: $inststatuslist,$instcode, 5264: $instseclist); 5265: }; 5266: if (!$@) { 5267: &Reply($client, \$outcome, $userinput); 5268: } else { 5269: &Failure($client,"unknown_cmd\n",$userinput); 5270: } 5271: return 1; 5272: } 5273: &register_handler("autocrsreqvalidation", \&validate_crsreq_handler, 0, 1, 0); 5274: 5275: # 5276: # Read and retrieve institutional code format (for support form). 5277: # Formal Parameters: 5278: # $cmd - Command that dispatched us. 5279: # $tail - Tail of the command. In this case it conatins 5280: # the course domain and the coursename. 5281: # $client - Socket open on the client. 5282: # Returns: 5283: # 1 - Continue processing. 5284: # 5285: sub get_institutional_code_format_handler { 5286: my ($cmd, $tail, $client) = @_; 5287: my $userinput = "$cmd:$tail"; 5288: 5289: my $reply; 5290: my($cdom,$course) = split(/:/,$tail); 5291: my @pairs = split/\&/,$course; 5292: my %instcodes = (); 5293: my %codes = (); 5294: my @codetitles = (); 5295: my %cat_titles = (); 5296: my %cat_order = (); 5297: foreach (@pairs) { 5298: my ($key,$value) = split/=/,$_; 5299: $instcodes{&unescape($key)} = &unescape($value); 5300: } 5301: my $formatreply = &localenroll::instcode_format($cdom, 5302: \%instcodes, 5303: \%codes, 5304: \@codetitles, 5305: \%cat_titles, 5306: \%cat_order); 5307: if ($formatreply eq 'ok') { 5308: my $codes_str = &Apache::lonnet::hash2str(%codes); 5309: my $codetitles_str = &Apache::lonnet::array2str(@codetitles); 5310: my $cat_titles_str = &Apache::lonnet::hash2str(%cat_titles); 5311: my $cat_order_str = &Apache::lonnet::hash2str(%cat_order); 5312: &Reply($client, 5313: $codes_str.':'.$codetitles_str.':'.$cat_titles_str.':' 5314: .$cat_order_str."\n", 5315: $userinput); 5316: } else { 5317: # this else branch added by RF since if not ok, lonc will 5318: # hang waiting on reply until timeout. 5319: # 5320: &Reply($client, "format_error\n", $userinput); 5321: } 5322: 5323: return 1; 5324: } 5325: &register_handler("autoinstcodeformat", 5326: \&get_institutional_code_format_handler,0,1,0); 5327: 5328: sub get_institutional_defaults_handler { 5329: my ($cmd, $tail, $client) = @_; 5330: my $userinput = "$cmd:$tail"; 5331: 5332: my $dom = $tail; 5333: my %defaults_hash; 5334: my @code_order; 5335: my $outcome; 5336: eval { 5337: local($SIG{__DIE__})='DEFAULT'; 5338: $outcome = &localenroll::instcode_defaults($dom,\%defaults_hash, 5339: \@code_order); 5340: }; 5341: if (!$@) { 5342: if ($outcome eq 'ok') { 5343: my $result=''; 5344: while (my ($key,$value) = each(%defaults_hash)) { 5345: $result.=&escape($key).'='.&escape($value).'&'; 5346: } 5347: $result .= 'code_order='.&escape(join('&',@code_order)); 5348: &Reply($client,\$result,$userinput); 5349: } else { 5350: &Reply($client,"error\n", $userinput); 5351: } 5352: } else { 5353: &Failure($client,"unknown_cmd\n",$userinput); 5354: } 5355: } 5356: &register_handler("autoinstcodedefaults", 5357: \&get_institutional_defaults_handler,0,1,0); 5358: 5359: sub get_possible_instcodes_handler { 5360: my ($cmd, $tail, $client) = @_; 5361: my $userinput = "$cmd:$tail"; 5362: 5363: my $reply; 5364: my $cdom = $tail; 5365: my (@codetitles,%cat_titles,%cat_order,@code_order); 5366: my $formatreply = &localenroll::possible_instcodes($cdom, 5367: \@codetitles, 5368: \%cat_titles, 5369: \%cat_order, 5370: \@code_order); 5371: if ($formatreply eq 'ok') { 5372: my $result = join('&',map {&escape($_);} (@codetitles)).':'; 5373: $result .= join('&',map {&escape($_);} (@code_order)).':'; 5374: foreach my $key (keys(%cat_titles)) { 5375: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($cat_titles{$key}).'&'; 5376: } 5377: $result =~ s/\&$//; 5378: $result .= ':'; 5379: foreach my $key (keys(%cat_order)) { 5380: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($cat_order{$key}).'&'; 5381: } 5382: $result =~ s/\&$//; 5383: &Reply($client,\$result,$userinput); 5384: } else { 5385: &Reply($client, "format_error\n", $userinput); 5386: } 5387: return 1; 5388: } 5389: &register_handler("autopossibleinstcodes", 5390: \&get_possible_instcodes_handler,0,1,0); 5391: 5392: sub get_institutional_user_rules { 5393: my ($cmd, $tail, $client) = @_; 5394: my $userinput = "$cmd:$tail"; 5395: my $dom = &unescape($tail); 5396: my (%rules_hash,@rules_order); 5397: my $outcome; 5398: eval { 5399: local($SIG{__DIE__})='DEFAULT'; 5400: $outcome = &localenroll::username_rules($dom,\%rules_hash,\@rules_order); 5401: }; 5402: if (!$@) { 5403: if ($outcome eq 'ok') { 5404: my $result; 5405: foreach my $key (keys(%rules_hash)) { 5406: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&'; 5407: } 5408: $result =~ s/\&$//; 5409: $result .= ':'; 5410: if (@rules_order > 0) { 5411: foreach my $item (@rules_order) { 5412: $result .= &escape($item).'&'; 5413: } 5414: } 5415: $result =~ s/\&$//; 5416: &Reply($client,\$result,$userinput); 5417: } else { 5418: &Reply($client,"error\n", $userinput); 5419: } 5420: } else { 5421: &Failure($client,"unknown_cmd\n",$userinput); 5422: } 5423: } 5424: &register_handler("instuserrules",\&get_institutional_user_rules,0,1,0); 5425: 5426: sub get_institutional_id_rules { 5427: my ($cmd, $tail, $client) = @_; 5428: my $userinput = "$cmd:$tail"; 5429: my $dom = &unescape($tail); 5430: my (%rules_hash,@rules_order); 5431: my $outcome; 5432: eval { 5433: local($SIG{__DIE__})='DEFAULT'; 5434: $outcome = &localenroll::id_rules($dom,\%rules_hash,\@rules_order); 5435: }; 5436: if (!$@) { 5437: if ($outcome eq 'ok') { 5438: my $result; 5439: foreach my $key (keys(%rules_hash)) { 5440: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&'; 5441: } 5442: $result =~ s/\&$//; 5443: $result .= ':'; 5444: if (@rules_order > 0) { 5445: foreach my $item (@rules_order) { 5446: $result .= &escape($item).'&'; 5447: } 5448: } 5449: $result =~ s/\&$//; 5450: &Reply($client,\$result,$userinput); 5451: } else { 5452: &Reply($client,"error\n", $userinput); 5453: } 5454: } else { 5455: &Failure($client,"unknown_cmd\n",$userinput); 5456: } 5457: } 5458: &register_handler("instidrules",\&get_institutional_id_rules,0,1,0); 5459: 5460: sub get_institutional_selfcreate_rules { 5461: my ($cmd, $tail, $client) = @_; 5462: my $userinput = "$cmd:$tail"; 5463: my $dom = &unescape($tail); 5464: my (%rules_hash,@rules_order); 5465: my $outcome; 5466: eval { 5467: local($SIG{__DIE__})='DEFAULT'; 5468: $outcome = &localenroll::selfcreate_rules($dom,\%rules_hash,\@rules_order); 5469: }; 5470: if (!$@) { 5471: if ($outcome eq 'ok') { 5472: my $result; 5473: foreach my $key (keys(%rules_hash)) { 5474: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&'; 5475: } 5476: $result =~ s/\&$//; 5477: $result .= ':'; 5478: if (@rules_order > 0) { 5479: foreach my $item (@rules_order) { 5480: $result .= &escape($item).'&'; 5481: } 5482: } 5483: $result =~ s/\&$//; 5484: &Reply($client,\$result,$userinput); 5485: } else { 5486: &Reply($client,"error\n", $userinput); 5487: } 5488: } else { 5489: &Failure($client,"unknown_cmd\n",$userinput); 5490: } 5491: } 5492: &register_handler("instemailrules",\&get_institutional_selfcreate_rules,0,1,0); 5493: 5494: 5495: sub institutional_username_check { 5496: my ($cmd, $tail, $client) = @_; 5497: my $userinput = "$cmd:$tail"; 5498: my %rulecheck; 5499: my $outcome; 5500: my ($udom,$uname,@rules) = split(/:/,$tail); 5501: $udom = &unescape($udom); 5502: $uname = &unescape($uname); 5503: @rules = map {&unescape($_);} (@rules); 5504: eval { 5505: local($SIG{__DIE__})='DEFAULT'; 5506: $outcome = &localenroll::username_check($udom,$uname,\@rules,\%rulecheck); 5507: }; 5508: if (!$@) { 5509: if ($outcome eq 'ok') { 5510: my $result=''; 5511: foreach my $key (keys(%rulecheck)) { 5512: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&'; 5513: } 5514: &Reply($client,\$result,$userinput); 5515: } else { 5516: &Reply($client,"error\n", $userinput); 5517: } 5518: } else { 5519: &Failure($client,"unknown_cmd\n",$userinput); 5520: } 5521: } 5522: &register_handler("instrulecheck",\&institutional_username_check,0,1,0); 5523: 5524: sub institutional_id_check { 5525: my ($cmd, $tail, $client) = @_; 5526: my $userinput = "$cmd:$tail"; 5527: my %rulecheck; 5528: my $outcome; 5529: my ($udom,$id,@rules) = split(/:/,$tail); 5530: $udom = &unescape($udom); 5531: $id = &unescape($id); 5532: @rules = map {&unescape($_);} (@rules); 5533: eval { 5534: local($SIG{__DIE__})='DEFAULT'; 5535: $outcome = &localenroll::id_check($udom,$id,\@rules,\%rulecheck); 5536: }; 5537: if (!$@) { 5538: if ($outcome eq 'ok') { 5539: my $result=''; 5540: foreach my $key (keys(%rulecheck)) { 5541: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&'; 5542: } 5543: &Reply($client,\$result,$userinput); 5544: } else { 5545: &Reply($client,"error\n", $userinput); 5546: } 5547: } else { 5548: &Failure($client,"unknown_cmd\n",$userinput); 5549: } 5550: } 5551: &register_handler("instidrulecheck",\&institutional_id_check,0,1,0); 5552: 5553: sub institutional_selfcreate_check { 5554: my ($cmd, $tail, $client) = @_; 5555: my $userinput = "$cmd:$tail"; 5556: my %rulecheck; 5557: my $outcome; 5558: my ($udom,$email,@rules) = split(/:/,$tail); 5559: $udom = &unescape($udom); 5560: $email = &unescape($email); 5561: @rules = map {&unescape($_);} (@rules); 5562: eval { 5563: local($SIG{__DIE__})='DEFAULT'; 5564: $outcome = &localenroll::selfcreate_check($udom,$email,\@rules,\%rulecheck); 5565: }; 5566: if (!$@) { 5567: if ($outcome eq 'ok') { 5568: my $result=''; 5569: foreach my $key (keys(%rulecheck)) { 5570: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&'; 5571: } 5572: &Reply($client,\$result,$userinput); 5573: } else { 5574: &Reply($client,"error\n", $userinput); 5575: } 5576: } else { 5577: &Failure($client,"unknown_cmd\n",$userinput); 5578: } 5579: } 5580: &register_handler("instselfcreatecheck",\&institutional_selfcreate_check,0,1,0); 5581: 5582: # Get domain specific conditions for import of student photographs to a course 5583: # 5584: # Retrieves information from photo_permission subroutine in localenroll. 5585: # Returns outcome (ok) if no processing errors, and whether course owner is 5586: # required to accept conditions of use (yes/no). 5587: # 5588: # 5589: sub photo_permission_handler { 5590: my ($cmd, $tail, $client) = @_; 5591: my $userinput = "$cmd:$tail"; 5592: my $cdom = $tail; 5593: my ($perm_reqd,$conditions); 5594: my $outcome; 5595: eval { 5596: local($SIG{__DIE__})='DEFAULT'; 5597: $outcome = &localenroll::photo_permission($cdom,\$perm_reqd, 5598: \$conditions); 5599: }; 5600: if (!$@) { 5601: &Reply($client, &escape($outcome.':'.$perm_reqd.':'. $conditions)."\n", 5602: $userinput); 5603: } else { 5604: &Failure($client,"unknown_cmd\n",$userinput); 5605: } 5606: return 1; 5607: } 5608: &register_handler("autophotopermission",\&photo_permission_handler,0,1,0); 5609: 5610: # 5611: # Checks if student photo is available for a user in the domain, in the user's 5612: # directory (in /userfiles/internal/studentphoto.jpg). 5613: # Uses localstudentphoto:fetch() to ensure there is an up to date copy of 5614: # the student's photo. 5615: 5616: sub photo_check_handler { 5617: my ($cmd, $tail, $client) = @_; 5618: my $userinput = "$cmd:$tail"; 5619: my ($udom,$uname,$pid) = split(/:/,$tail); 5620: $udom = &unescape($udom); 5621: $uname = &unescape($uname); 5622: $pid = &unescape($pid); 5623: my $path=&propath($udom,$uname).'/userfiles/internal/'; 5624: if (!-e $path) { 5625: &mkpath($path); 5626: } 5627: my $response; 5628: my $result = &localstudentphoto::fetch($udom,$uname,$pid,\$response); 5629: $result .= ':'.$response; 5630: &Reply($client, &escape($result)."\n",$userinput); 5631: return 1; 5632: } 5633: &register_handler("autophotocheck",\&photo_check_handler,0,1,0); 5634: 5635: # 5636: # Retrieve information from localenroll about whether to provide a button 5637: # for users who have enbled import of student photos to initiate an 5638: # update of photo files for registered students. Also include 5639: # comment to display alongside button. 5640: 5641: sub photo_choice_handler { 5642: my ($cmd, $tail, $client) = @_; 5643: my $userinput = "$cmd:$tail"; 5644: my $cdom = &unescape($tail); 5645: my ($update,$comment); 5646: eval { 5647: local($SIG{__DIE__})='DEFAULT'; 5648: ($update,$comment) = &localenroll::manager_photo_update($cdom); 5649: }; 5650: if (!$@) { 5651: &Reply($client,&escape($update).':'.&escape($comment)."\n",$userinput); 5652: } else { 5653: &Failure($client,"unknown_cmd\n",$userinput); 5654: } 5655: return 1; 5656: } 5657: &register_handler("autophotochoice",\&photo_choice_handler,0,1,0); 5658: 5659: # 5660: # Gets a student's photo to exist (in the correct image type) in the user's 5661: # directory. 5662: # Formal Parameters: 5663: # $cmd - The command request that got us dispatched. 5664: # $tail - A colon separated set of words that will be split into: 5665: # $domain - student's domain 5666: # $uname - student username 5667: # $type - image type desired 5668: # $client - The socket open on the client. 5669: # Returns: 5670: # 1 - continue processing. 5671: 5672: sub student_photo_handler { 5673: my ($cmd, $tail, $client) = @_; 5674: my ($domain,$uname,$ext,$type) = split(/:/, $tail); 5675: 5676: my $path=&propath($domain,$uname). '/userfiles/internal/'; 5677: my $filename = 'studentphoto.'.$ext; 5678: if ($type eq 'thumbnail') { 5679: $filename = 'studentphoto_tn.'.$ext; 5680: } 5681: if (-e $path.$filename) { 5682: &Reply($client,"ok\n","$cmd:$tail"); 5683: return 1; 5684: } 5685: &mkpath($path); 5686: my $file; 5687: if ($type eq 'thumbnail') { 5688: eval { 5689: local($SIG{__DIE__})='DEFAULT'; 5690: $file=&localstudentphoto::fetch_thumbnail($domain,$uname); 5691: }; 5692: } else { 5693: $file=&localstudentphoto::fetch($domain,$uname); 5694: } 5695: if (!$file) { 5696: &Failure($client,"unavailable\n","$cmd:$tail"); 5697: return 1; 5698: } 5699: if (!-e $path.$filename) { &convert_photo($file,$path.$filename); } 5700: if (-e $path.$filename) { 5701: &Reply($client,"ok\n","$cmd:$tail"); 5702: return 1; 5703: } 5704: &Failure($client,"unable_to_convert\n","$cmd:$tail"); 5705: return 1; 5706: } 5707: &register_handler("studentphoto", \&student_photo_handler, 0, 1, 0); 5708: 5709: sub inst_usertypes_handler { 5710: my ($cmd, $domain, $client) = @_; 5711: my $res; 5712: my $userinput = $cmd.":".$domain; # For logging purposes. 5713: my (%typeshash,@order,$result); 5714: eval { 5715: local($SIG{__DIE__})='DEFAULT'; 5716: $result=&localenroll::inst_usertypes($domain,\%typeshash,\@order); 5717: }; 5718: if ($result eq 'ok') { 5719: if (keys(%typeshash) > 0) { 5720: foreach my $key (keys(%typeshash)) { 5721: $res.=&escape($key).'='.&escape($typeshash{$key}).'&'; 5722: } 5723: } 5724: $res=~s/\&$//; 5725: $res .= ':'; 5726: if (@order > 0) { 5727: foreach my $item (@order) { 5728: $res .= &escape($item).'&'; 5729: } 5730: } 5731: $res=~s/\&$//; 5732: } 5733: &Reply($client, \$res, $userinput); 5734: return 1; 5735: } 5736: &register_handler("inst_usertypes", \&inst_usertypes_handler, 0, 1, 0); 5737: 5738: # mkpath makes all directories for a file, expects an absolute path with a 5739: # file or a trailing / if just a dir is passed 5740: # returns 1 on success 0 on failure 5741: sub mkpath { 5742: my ($file)=@_; 5743: my @parts=split(/\//,$file,-1); 5744: my $now=$parts[0].'/'.$parts[1].'/'.$parts[2]; 5745: for (my $i=3;$i<= ($#parts-1);$i++) { 5746: $now.='/'.$parts[$i]; 5747: if (!-e $now) { 5748: if (!mkdir($now,0770)) { return 0; } 5749: } 5750: } 5751: return 1; 5752: } 5753: 5754: #--------------------------------------------------------------- 5755: # 5756: # Getting, decoding and dispatching requests: 5757: # 5758: # 5759: # Get a Request: 5760: # Gets a Request message from the client. The transaction 5761: # is defined as a 'line' of text. We remove the new line 5762: # from the text line. 5763: # 5764: sub get_request { 5765: my $input = <$client>; 5766: chomp($input); 5767: 5768: &Debug("get_request: Request = $input\n"); 5769: 5770: &status('Processing '.$clientname.':'.$input); 5771: 5772: return $input; 5773: } 5774: #--------------------------------------------------------------- 5775: # 5776: # Process a request. This sub should shrink as each action 5777: # gets farmed out into a separat sub that is registered 5778: # with the dispatch hash. 5779: # 5780: # Parameters: 5781: # user_input - The request received from the client (lonc). 5782: # Returns: 5783: # true to keep processing, false if caller should exit. 5784: # 5785: sub process_request { 5786: my ($userinput) = @_; # Easier for now to break style than to 5787: # fix all the userinput -> user_input. 5788: my $wasenc = 0; # True if request was encrypted. 5789: # ------------------------------------------------------------ See if encrypted 5790: # for command 5791: # sethost:<server> 5792: # <command>:<args> 5793: # we just send it to the processor 5794: # for 5795: # sethost:<server>:<command>:<args> 5796: # we do the implict set host and then do the command 5797: if ($userinput =~ /^sethost:/) { 5798: (my $cmd,my $newid,$userinput) = split(':',$userinput,3); 5799: if (defined($userinput)) { 5800: &sethost("$cmd:$newid"); 5801: } else { 5802: $userinput = "$cmd:$newid"; 5803: } 5804: } 5805: 5806: if ($userinput =~ /^enc/) { 5807: $userinput = decipher($userinput); 5808: $wasenc=1; 5809: if(!$userinput) { # Cipher not defined. 5810: &Failure($client, "error: Encrypted data without negotated key\n"); 5811: return 0; 5812: } 5813: } 5814: Debug("process_request: $userinput\n"); 5815: 5816: # 5817: # The 'correct way' to add a command to lond is now to 5818: # write a sub to execute it and Add it to the command dispatch 5819: # hash via a call to register_handler.. The comments to that 5820: # sub should give you enough to go on to show how to do this 5821: # along with the examples that are building up as this code 5822: # is getting refactored. Until all branches of the 5823: # if/elseif monster below have been factored out into 5824: # separate procesor subs, if the dispatch hash is missing 5825: # the command keyword, we will fall through to the remainder 5826: # of the if/else chain below in order to keep this thing in 5827: # working order throughout the transmogrification. 5828: 5829: my ($command, $tail) = split(/:/, $userinput, 2); 5830: chomp($command); 5831: chomp($tail); 5832: $tail =~ s/(\r)//; # This helps people debugging with e.g. telnet. 5833: $command =~ s/(\r)//; # And this too for parameterless commands. 5834: if(!$tail) { 5835: $tail =""; # defined but blank. 5836: } 5837: 5838: &Debug("Command received: $command, encoded = $wasenc"); 5839: 5840: if(defined $Dispatcher{$command}) { 5841: 5842: my $dispatch_info = $Dispatcher{$command}; 5843: my $handler = $$dispatch_info[0]; 5844: my $need_encode = $$dispatch_info[1]; 5845: my $client_types = $$dispatch_info[2]; 5846: Debug("Matched dispatch hash: mustencode: $need_encode " 5847: ."ClientType $client_types"); 5848: 5849: # Validate the request: 5850: 5851: my $ok = 1; 5852: my $requesterprivs = 0; 5853: if(&isClient()) { 5854: $requesterprivs |= $CLIENT_OK; 5855: } 5856: if(&isManager()) { 5857: $requesterprivs |= $MANAGER_OK; 5858: } 5859: if($need_encode && (!$wasenc)) { 5860: Debug("Must encode but wasn't: $need_encode $wasenc"); 5861: $ok = 0; 5862: } 5863: if(($client_types & $requesterprivs) == 0) { 5864: Debug("Client not privileged to do this operation"); 5865: $ok = 0; 5866: } 5867: 5868: if($ok) { 5869: Debug("Dispatching to handler $command $tail"); 5870: my $keep_going = &$handler($command, $tail, $client); 5871: return $keep_going; 5872: } else { 5873: Debug("Refusing to dispatch because client did not match requirements"); 5874: Failure($client, "refused\n", $userinput); 5875: return 1; 5876: } 5877: 5878: } 5879: 5880: print $client "unknown_cmd\n"; 5881: # -------------------------------------------------------------------- complete 5882: Debug("process_request - returning 1"); 5883: return 1; 5884: } 5885: # 5886: # Decipher encoded traffic 5887: # Parameters: 5888: # input - Encoded data. 5889: # Returns: 5890: # Decoded data or undef if encryption key was not yet negotiated. 5891: # Implicit input: 5892: # cipher - This global holds the negotiated encryption key. 5893: # 5894: sub decipher { 5895: my ($input) = @_; 5896: my $output = ''; 5897: 5898: 5899: if($cipher) { 5900: my($enc, $enclength, $encinput) = split(/:/, $input); 5901: for(my $encidx = 0; $encidx < length($encinput); $encidx += 16) { 5902: $output .= 5903: $cipher->decrypt(pack("H16", substr($encinput, $encidx, 16))); 5904: } 5905: return substr($output, 0, $enclength); 5906: } else { 5907: return undef; 5908: } 5909: } 5910: 5911: # 5912: # Register a command processor. This function is invoked to register a sub 5913: # to process a request. Once registered, the ProcessRequest sub can automatically 5914: # dispatch requests to an appropriate sub, and do the top level validity checking 5915: # as well: 5916: # - Is the keyword recognized. 5917: # - Is the proper client type attempting the request. 5918: # - Is the request encrypted if it has to be. 5919: # Parameters: 5920: # $request_name - Name of the request being registered. 5921: # This is the command request that will match 5922: # against the hash keywords to lookup the information 5923: # associated with the dispatch information. 5924: # $procedure - Reference to a sub to call to process the request. 5925: # All subs get called as follows: 5926: # Procedure($cmd, $tail, $replyfd, $key) 5927: # $cmd - the actual keyword that invoked us. 5928: # $tail - the tail of the request that invoked us. 5929: # $replyfd- File descriptor connected to the client 5930: # $must_encode - True if the request must be encoded to be good. 5931: # $client_ok - True if it's ok for a client to request this. 5932: # $manager_ok - True if it's ok for a manager to request this. 5933: # Side effects: 5934: # - On success, the Dispatcher hash has an entry added for the key $RequestName 5935: # - On failure, the program will die as it's a bad internal bug to try to 5936: # register a duplicate command handler. 5937: # 5938: sub register_handler { 5939: my ($request_name,$procedure,$must_encode, $client_ok,$manager_ok) = @_; 5940: 5941: # Don't allow duplication# 5942: 5943: if (defined $Dispatcher{$request_name}) { 5944: die "Attempting to define a duplicate request handler for $request_name\n"; 5945: } 5946: # Build the client type mask: 5947: 5948: my $client_type_mask = 0; 5949: if($client_ok) { 5950: $client_type_mask |= $CLIENT_OK; 5951: } 5952: if($manager_ok) { 5953: $client_type_mask |= $MANAGER_OK; 5954: } 5955: 5956: # Enter the hash: 5957: 5958: my @entry = ($procedure, $must_encode, $client_type_mask); 5959: 5960: $Dispatcher{$request_name} = \@entry; 5961: 5962: } 5963: 5964: 5965: #------------------------------------------------------------------ 5966: 5967: 5968: 5969: 5970: # 5971: # Convert an error return code from lcpasswd to a string value. 5972: # 5973: sub lcpasswdstrerror { 5974: my $ErrorCode = shift; 5975: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) { 5976: return "lcpasswd Unrecognized error return value ".$ErrorCode; 5977: } else { 5978: return $passwderrors[$ErrorCode]; 5979: } 5980: } 5981: 5982: # 5983: # Convert an error return code from lcuseradd to a string value: 5984: # 5985: sub lcuseraddstrerror { 5986: my $ErrorCode = shift; 5987: if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) { 5988: return "lcuseradd - Unrecognized error code: ".$ErrorCode; 5989: } else { 5990: return $adderrors[$ErrorCode]; 5991: } 5992: } 5993: 5994: # grabs exception and records it to log before exiting 5995: sub catchexception { 5996: my ($error)=@_; 5997: $SIG{'QUIT'}='DEFAULT'; 5998: $SIG{__DIE__}='DEFAULT'; 5999: &status("Catching exception"); 6000: &logthis("CRITICAL: " 6001: ."ABNORMAL EXIT. Child $$ for server ".$perlvar{'lonHostID'}." died through " 6002: ."a crash with this error msg->[$error]"); 6003: &logthis('Famous last words: '.$status.' - '.$lastlog); 6004: if ($client) { print $client "error: $error\n"; } 6005: $server->close(); 6006: die($error); 6007: } 6008: sub timeout { 6009: &status("Handling Timeout"); 6010: &logthis("CRITICAL: TIME OUT ".$$.""); 6011: &catchexception('Timeout'); 6012: } 6013: # -------------------------------- Set signal handlers to record abnormal exits 6014: 6015: 6016: $SIG{'QUIT'}=\&catchexception; 6017: $SIG{__DIE__}=\&catchexception; 6018: 6019: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf 6020: &status("Read loncapa.conf and loncapa_apache.conf"); 6021: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf'); 6022: %perlvar=%{$perlvarref}; 6023: undef $perlvarref; 6024: 6025: # ----------------------------- Make sure this process is running from user=www 6026: my $wwwid=getpwnam('www'); 6027: if ($wwwid!=$<) { 6028: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}"; 6029: my $subj="LON: $currenthostid User ID mismatch"; 6030: system("echo 'User ID mismatch. lond must be run as user www.' |\ 6031: mailto $emailto -s '$subj' > /dev/null"); 6032: exit 1; 6033: } 6034: 6035: # --------------------------------------------- Check if other instance running 6036: 6037: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid"; 6038: 6039: if (-e $pidfile) { 6040: my $lfh=IO::File->new("$pidfile"); 6041: my $pide=<$lfh>; 6042: chomp($pide); 6043: if (kill 0 => $pide) { die "already running"; } 6044: } 6045: 6046: # ------------------------------------------------------------- Read hosts file 6047: 6048: 6049: 6050: # establish SERVER socket, bind and listen. 6051: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'}, 6052: Type => SOCK_STREAM, 6053: Proto => 'tcp', 6054: ReuseAddr => 1, 6055: Listen => 10 ) 6056: or die "making socket: $@\n"; 6057: 6058: # --------------------------------------------------------- Do global variables 6059: 6060: # global variables 6061: 6062: my %children = (); # keys are current child process IDs 6063: 6064: sub REAPER { # takes care of dead children 6065: $SIG{CHLD} = \&REAPER; 6066: &status("Handling child death"); 6067: my $pid; 6068: do { 6069: $pid = waitpid(-1,&WNOHANG()); 6070: if (defined($children{$pid})) { 6071: &logthis("Child $pid died"); 6072: delete($children{$pid}); 6073: } elsif ($pid > 0) { 6074: &logthis("Unknown Child $pid died"); 6075: } 6076: } while ( $pid > 0 ); 6077: foreach my $child (keys(%children)) { 6078: $pid = waitpid($child,&WNOHANG()); 6079: if ($pid > 0) { 6080: &logthis("Child $child - $pid looks like we missed it's death"); 6081: delete($children{$pid}); 6082: } 6083: } 6084: &status("Finished Handling child death"); 6085: } 6086: 6087: sub HUNTSMAN { # signal handler for SIGINT 6088: &status("Killing children (INT)"); 6089: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children 6090: kill 'INT' => keys %children; 6091: &logthis("Free socket: ".shutdown($server,2)); # free up socket 6092: my $execdir=$perlvar{'lonDaemons'}; 6093: unlink("$execdir/logs/lond.pid"); 6094: &logthis("CRITICAL: Shutting down"); 6095: &status("Done killing children"); 6096: exit; # clean up with dignity 6097: } 6098: 6099: sub HUPSMAN { # signal handler for SIGHUP 6100: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children 6101: &status("Killing children for restart (HUP)"); 6102: kill 'INT' => keys %children; 6103: &logthis("Free socket: ".shutdown($server,2)); # free up socket 6104: &logthis("CRITICAL: Restarting"); 6105: my $execdir=$perlvar{'lonDaemons'}; 6106: unlink("$execdir/logs/lond.pid"); 6107: &status("Restarting self (HUP)"); 6108: exec("$execdir/lond"); # here we go again 6109: } 6110: 6111: # 6112: # Reload the Apache daemon's state. 6113: # This is done by invoking /home/httpd/perl/apachereload 6114: # a setuid perl script that can be root for us to do this job. 6115: # 6116: sub ReloadApache { 6117: my $execdir = $perlvar{'lonDaemons'}; 6118: my $script = $execdir."/apachereload"; 6119: system($script); 6120: } 6121: 6122: # 6123: # Called in response to a USR2 signal. 6124: # - Reread hosts.tab 6125: # - All children connected to hosts that were removed from hosts.tab 6126: # are killed via SIGINT 6127: # - All children connected to previously existing hosts are sent SIGUSR1 6128: # - Our internal hosts hash is updated to reflect the new contents of 6129: # hosts.tab causing connections from hosts added to hosts.tab to 6130: # now be honored. 6131: # 6132: sub UpdateHosts { 6133: &status("Reload hosts.tab"); 6134: logthis(' Updating connections '); 6135: # 6136: # The %children hash has the set of IP's we currently have children 6137: # on. These need to be matched against records in the hosts.tab 6138: # Any ip's no longer in the table get killed off they correspond to 6139: # either dropped or changed hosts. Note that the re-read of the table 6140: # will take care of new and changed hosts as connections come into being. 6141: 6142: &Apache::lonnet::reset_hosts_info(); 6143: 6144: foreach my $child (keys(%children)) { 6145: my $childip = $children{$child}; 6146: if ($childip ne '127.0.0.1' 6147: && !defined(&Apache::lonnet::get_hosts_from_ip($childip))) { 6148: logthis(' UpdateHosts killing child ' 6149: ." $child for ip $childip "); 6150: kill('INT', $child); 6151: } else { 6152: logthis(' keeping child for ip ' 6153: ." $childip (pid=$child) "); 6154: } 6155: } 6156: ReloadApache; 6157: &status("Finished reloading hosts.tab"); 6158: } 6159: 6160: 6161: sub checkchildren { 6162: &status("Checking on the children (sending signals)"); 6163: &initnewstatus(); 6164: &logstatus(); 6165: &logthis('Going to check on the children'); 6166: my $docdir=$perlvar{'lonDocRoot'}; 6167: foreach (sort keys %children) { 6168: #sleep 1; 6169: unless (kill 'USR1' => $_) { 6170: &logthis ('Child '.$_.' is dead'); 6171: &logstatus($$.' is dead'); 6172: delete($children{$_}); 6173: } 6174: } 6175: sleep 5; 6176: $SIG{ALRM} = sub { Debug("timeout"); 6177: die "timeout"; }; 6178: $SIG{__DIE__} = 'DEFAULT'; 6179: &status("Checking on the children (waiting for reports)"); 6180: foreach (sort keys %children) { 6181: unless (-e "$docdir/lon-status/londchld/$_.txt") { 6182: eval { 6183: alarm(300); 6184: &logthis('Child '.$_.' did not respond'); 6185: kill 9 => $_; 6186: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}"; 6187: #$subj="LON: $currenthostid killed lond process $_"; 6188: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`; 6189: #$execdir=$perlvar{'lonDaemons'}; 6190: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`; 6191: delete($children{$_}); 6192: alarm(0); 6193: } 6194: } 6195: } 6196: $SIG{ALRM} = 'DEFAULT'; 6197: $SIG{__DIE__} = \&catchexception; 6198: &status("Finished checking children"); 6199: &logthis('Finished Checking children'); 6200: } 6201: 6202: # --------------------------------------------------------------------- Logging 6203: 6204: sub logthis { 6205: my $message=shift; 6206: my $execdir=$perlvar{'lonDaemons'}; 6207: my $fh=IO::File->new(">>$execdir/logs/lond.log"); 6208: my $now=time; 6209: my $local=localtime($now); 6210: $lastlog=$local.': '.$message; 6211: print $fh "$local ($$): $message\n"; 6212: } 6213: 6214: # ------------------------- Conditional log if $DEBUG true. 6215: sub Debug { 6216: my $message = shift; 6217: if($DEBUG) { 6218: &logthis($message); 6219: } 6220: } 6221: 6222: # 6223: # Sub to do replies to client.. this gives a hook for some 6224: # debug tracing too: 6225: # Parameters: 6226: # fd - File open on client. 6227: # reply - Text to send to client. 6228: # request - Original request from client. 6229: # 6230: sub Reply { 6231: my ($fd, $reply, $request) = @_; 6232: if (ref($reply)) { 6233: print $fd $$reply; 6234: print $fd "\n"; 6235: if ($DEBUG) { Debug("Request was $request Reply was $$reply"); } 6236: } else { 6237: print $fd $reply; 6238: if ($DEBUG) { Debug("Request was $request Reply was $reply"); } 6239: } 6240: $Transactions++; 6241: } 6242: 6243: 6244: # 6245: # Sub to report a failure. 6246: # This function: 6247: # - Increments the failure statistic counters. 6248: # - Invokes Reply to send the error message to the client. 6249: # Parameters: 6250: # fd - File descriptor open on the client 6251: # reply - Reply text to emit. 6252: # request - The original request message (used by Reply 6253: # to debug if that's enabled. 6254: # Implicit outputs: 6255: # $Failures- The number of failures is incremented. 6256: # Reply (invoked here) sends a message to the 6257: # client: 6258: # 6259: sub Failure { 6260: my $fd = shift; 6261: my $reply = shift; 6262: my $request = shift; 6263: 6264: $Failures++; 6265: Reply($fd, $reply, $request); # That's simple eh? 6266: } 6267: # ------------------------------------------------------------------ Log status 6268: 6269: sub logstatus { 6270: &status("Doing logging"); 6271: my $docdir=$perlvar{'lonDocRoot'}; 6272: { 6273: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt"); 6274: print $fh $status."\n".$lastlog."\n".time."\n$keymode"; 6275: $fh->close(); 6276: } 6277: &status("Finished $$.txt"); 6278: { 6279: open(LOG,">>$docdir/lon-status/londstatus.txt"); 6280: flock(LOG,LOCK_EX); 6281: print LOG $$."\t".$clientname."\t".$currenthostid."\t" 6282: .$status."\t".$lastlog."\t $keymode\n"; 6283: flock(LOG,LOCK_UN); 6284: close(LOG); 6285: } 6286: &status("Finished logging"); 6287: } 6288: 6289: sub initnewstatus { 6290: my $docdir=$perlvar{'lonDocRoot'}; 6291: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt"); 6292: my $now=time(); 6293: my $local=localtime($now); 6294: print $fh "LOND status $local - parent $$\n\n"; 6295: opendir(DIR,"$docdir/lon-status/londchld"); 6296: while (my $filename=readdir(DIR)) { 6297: unlink("$docdir/lon-status/londchld/$filename"); 6298: } 6299: closedir(DIR); 6300: } 6301: 6302: # -------------------------------------------------------------- Status setting 6303: 6304: sub status { 6305: my $what=shift; 6306: my $now=time; 6307: my $local=localtime($now); 6308: $status=$local.': '.$what; 6309: $0='lond: '.$what.' '.$local; 6310: } 6311: 6312: # -------------------------------------------------------------- Talk to lonsql 6313: 6314: sub sql_reply { 6315: my ($cmd)=@_; 6316: my $answer=&sub_sql_reply($cmd); 6317: if ($answer eq 'con_lost') { $answer=&sub_sql_reply($cmd); } 6318: return $answer; 6319: } 6320: 6321: sub sub_sql_reply { 6322: my ($cmd)=@_; 6323: my $unixsock="mysqlsock"; 6324: my $peerfile="$perlvar{'lonSockDir'}/$unixsock"; 6325: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile", 6326: Type => SOCK_STREAM, 6327: Timeout => 10) 6328: or return "con_lost"; 6329: print $sclient "$cmd:$currentdomainid\n"; 6330: my $answer=<$sclient>; 6331: chomp($answer); 6332: if (!$answer) { $answer="con_lost"; } 6333: return $answer; 6334: } 6335: 6336: # --------------------------------------- Is this the home server of an author? 6337: 6338: sub ishome { 6339: my $author=shift; 6340: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/; 6341: my ($udom,$uname)=split(/\//,$author); 6342: my $proname=propath($udom,$uname); 6343: if (-e $proname) { 6344: return 'owner'; 6345: } else { 6346: return 'not_owner'; 6347: } 6348: } 6349: 6350: # ======================================================= Continue main program 6351: # ---------------------------------------------------- Fork once and dissociate 6352: 6353: my $fpid=fork; 6354: exit if $fpid; 6355: die "Couldn't fork: $!" unless defined ($fpid); 6356: 6357: POSIX::setsid() or die "Can't start new session: $!"; 6358: 6359: # ------------------------------------------------------- Write our PID on disk 6360: 6361: my $execdir=$perlvar{'lonDaemons'}; 6362: open (PIDSAVE,">$execdir/logs/lond.pid"); 6363: print PIDSAVE "$$\n"; 6364: close(PIDSAVE); 6365: &logthis("CRITICAL: ---------- Starting ----------"); 6366: &status('Starting'); 6367: 6368: 6369: 6370: # ----------------------------------------------------- Install signal handlers 6371: 6372: 6373: $SIG{CHLD} = \&REAPER; 6374: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN; 6375: $SIG{HUP} = \&HUPSMAN; 6376: $SIG{USR1} = \&checkchildren; 6377: $SIG{USR2} = \&UpdateHosts; 6378: 6379: # Read the host hashes: 6380: &Apache::lonnet::load_hosts_tab(); 6381: my %iphost = &Apache::lonnet::get_iphost(1); 6382: 6383: my $dist=`$perlvar{'lonDaemons'}/distprobe`; 6384: 6385: my $arch = `uname -i`; 6386: if ($arch eq 'unknown') { 6387: $arch = `uname -m`; 6388: } 6389: 6390: # -------------------------------------------------------------- 6391: # Accept connections. When a connection comes in, it is validated 6392: # and if good, a child process is created to process transactions 6393: # along the connection. 6394: 6395: while (1) { 6396: &status('Starting accept'); 6397: $client = $server->accept() or next; 6398: &status('Accepted '.$client.' off to spawn'); 6399: make_new_child($client); 6400: &status('Finished spawning'); 6401: } 6402: 6403: sub make_new_child { 6404: my $pid; 6405: # my $cipher; # Now global 6406: my $sigset; 6407: 6408: $client = shift; 6409: &status('Starting new child '.$client); 6410: &logthis(' Attempting to start child ('.$client. 6411: ")"); 6412: # block signal for fork 6413: $sigset = POSIX::SigSet->new(SIGINT); 6414: sigprocmask(SIG_BLOCK, $sigset) 6415: or die "Can't block SIGINT for fork: $!\n"; 6416: 6417: die "fork: $!" unless defined ($pid = fork); 6418: 6419: $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of 6420: # connection liveness. 6421: 6422: # 6423: # Figure out who we're talking to so we can record the peer in 6424: # the pid hash. 6425: # 6426: my $caller = getpeername($client); 6427: my ($port,$iaddr); 6428: if (defined($caller) && length($caller) > 0) { 6429: ($port,$iaddr)=unpack_sockaddr_in($caller); 6430: } else { 6431: &logthis("Unable to determine who caller was, getpeername returned nothing"); 6432: } 6433: if (defined($iaddr)) { 6434: $clientip = inet_ntoa($iaddr); 6435: Debug("Connected with $clientip"); 6436: } else { 6437: &logthis("Unable to determine clientip"); 6438: $clientip='Unavailable'; 6439: } 6440: 6441: if ($pid) { 6442: # Parent records the child's birth and returns. 6443: sigprocmask(SIG_UNBLOCK, $sigset) 6444: or die "Can't unblock SIGINT for fork: $!\n"; 6445: $children{$pid} = $clientip; 6446: &status('Started child '.$pid); 6447: close($client); 6448: return; 6449: } else { 6450: # Child can *not* return from this subroutine. 6451: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before 6452: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns 6453: #don't get intercepted 6454: $SIG{USR1}= \&logstatus; 6455: $SIG{ALRM}= \&timeout; 6456: # 6457: # Block sigpipe as it gets thrownon socket disconnect and we want to 6458: # deal with that as a read faiure instead. 6459: # 6460: my $blockset = POSIX::SigSet->new(SIGPIPE); 6461: sigprocmask(SIG_BLOCK, $blockset); 6462: 6463: $lastlog='Forked '; 6464: $status='Forked'; 6465: 6466: # unblock signals 6467: sigprocmask(SIG_UNBLOCK, $sigset) 6468: or die "Can't unblock SIGINT for fork: $!\n"; 6469: 6470: # my $tmpsnum=0; # Now global 6471: #---------------------------------------------------- kerberos 5 initialization 6472: &Authen::Krb5::init_context(); 6473: unless (($dist eq 'fedora5') || ($dist eq 'fedora4') || 6474: ($dist eq 'fedora6') || ($dist eq 'suse9.3')) { 6475: &Authen::Krb5::init_ets(); 6476: } 6477: 6478: &status('Accepted connection'); 6479: # ============================================================================= 6480: # do something with the connection 6481: # ----------------------------------------------------------------------------- 6482: # see if we know client and 'check' for spoof IP by ineffective challenge 6483: 6484: my $outsideip=$clientip; 6485: if ($clientip eq '127.0.0.1') { 6486: $outsideip=&Apache::lonnet::get_host_ip($perlvar{'lonHostID'}); 6487: } 6488: &ReadManagerTable(); 6489: my $clientrec=defined(&Apache::lonnet::get_hosts_from_ip($outsideip)); 6490: my $ismanager=($managers{$outsideip} ne undef); 6491: $clientname = "[unknown]"; 6492: if($clientrec) { # Establish client type. 6493: $ConnectionType = "client"; 6494: $clientname = (&Apache::lonnet::get_hosts_from_ip($outsideip))[-1]; 6495: if($ismanager) { 6496: $ConnectionType = "both"; 6497: } 6498: } else { 6499: $ConnectionType = "manager"; 6500: $clientname = $managers{$outsideip}; 6501: } 6502: my $clientok; 6503: 6504: if ($clientrec || $ismanager) { 6505: &status("Waiting for init from $clientip $clientname"); 6506: &logthis('INFO: Connection, '. 6507: $clientip. 6508: " ($clientname) connection type = $ConnectionType " ); 6509: &status("Connecting $clientip ($clientname))"); 6510: my $remotereq=<$client>; 6511: chomp($remotereq); 6512: Debug("Got init: $remotereq"); 6513: 6514: if ($remotereq =~ /^init/) { 6515: &sethost("sethost:$perlvar{'lonHostID'}"); 6516: # 6517: # If the remote is attempting a local init... give that a try: 6518: # 6519: (my $i, my $inittype, $clientversion) = split(/:/, $remotereq); 6520: 6521: # If the connection type is ssl, but I didn't get my 6522: # certificate files yet, then I'll drop back to 6523: # insecure (if allowed). 6524: 6525: if($inittype eq "ssl") { 6526: my ($ca, $cert) = lonssl::CertificateFile; 6527: my $kfile = lonssl::KeyFile; 6528: if((!$ca) || 6529: (!$cert) || 6530: (!$kfile)) { 6531: $inittype = ""; # This forces insecure attempt. 6532: &logthis(" Certificates not " 6533: ."installed -- trying insecure auth"); 6534: } else { # SSL certificates are in place so 6535: } # Leave the inittype alone. 6536: } 6537: 6538: if($inittype eq "local") { 6539: $clientversion = $perlvar{'lonVersion'}; 6540: my $key = LocalConnection($client, $remotereq); 6541: if($key) { 6542: Debug("Got local key $key"); 6543: $clientok = 1; 6544: my $cipherkey = pack("H32", $key); 6545: $cipher = new IDEA($cipherkey); 6546: print $client "ok:local\n"; 6547: &logthis('' 6548: . "Successful local authentication "); 6549: $keymode = "local" 6550: } else { 6551: Debug("Failed to get local key"); 6552: $clientok = 0; 6553: shutdown($client, 3); 6554: close $client; 6555: } 6556: } elsif ($inittype eq "ssl") { 6557: my $key = SSLConnection($client); 6558: if ($key) { 6559: $clientok = 1; 6560: my $cipherkey = pack("H32", $key); 6561: $cipher = new IDEA($cipherkey); 6562: &logthis('' 6563: ."Successfull ssl authentication with $clientname "); 6564: $keymode = "ssl"; 6565: 6566: } else { 6567: $clientok = 0; 6568: close $client; 6569: } 6570: 6571: } else { 6572: my $ok = InsecureConnection($client); 6573: if($ok) { 6574: $clientok = 1; 6575: &logthis('' 6576: ."Successful insecure authentication with $clientname "); 6577: print $client "ok\n"; 6578: $keymode = "insecure"; 6579: } else { 6580: &logthis('' 6581: ."Attempted insecure connection disallowed "); 6582: close $client; 6583: $clientok = 0; 6584: 6585: } 6586: } 6587: } else { 6588: &logthis( 6589: "WARNING: " 6590: ."$clientip failed to initialize: >$remotereq< "); 6591: &status('No init '.$clientip); 6592: } 6593: 6594: } else { 6595: &logthis( 6596: "WARNING: Unknown client $clientip"); 6597: &status('Hung up on '.$clientip); 6598: } 6599: 6600: if ($clientok) { 6601: # ---------------- New known client connecting, could mean machine online again 6602: if (&Apache::lonnet::get_host_ip($currenthostid) ne $clientip 6603: && $clientip ne '127.0.0.1') { 6604: &Apache::lonnet::reconlonc($clientname); 6605: } 6606: &logthis("Established connection: $clientname"); 6607: &status('Will listen to '.$clientname); 6608: # ------------------------------------------------------------ Process requests 6609: my $keep_going = 1; 6610: my $user_input; 6611: my $clienthost = &Apache::lonnet::hostname($clientname); 6612: my $clientserverhomeID = &Apache::lonnet::get_server_homeID($clienthost); 6613: $clienthomedom = &Apache::lonnet::host_domain($clientserverhomeID); 6614: while(($user_input = get_request) && $keep_going) { 6615: alarm(120); 6616: Debug("Main: Got $user_input\n"); 6617: $keep_going = &process_request($user_input); 6618: alarm(0); 6619: &status('Listening to '.$clientname." ($keymode)"); 6620: } 6621: 6622: # --------------------------------------------- client unknown or fishy, refuse 6623: } else { 6624: print $client "refused\n"; 6625: $client->close(); 6626: &logthis("WARNING: " 6627: ."Rejected client $clientip, closing connection"); 6628: } 6629: } 6630: 6631: # ============================================================================= 6632: 6633: &logthis("CRITICAL: " 6634: ."Disconnect from $clientip ($clientname)"); 6635: 6636: 6637: # this exit is VERY important, otherwise the child will become 6638: # a producer of more and more children, forking yourself into 6639: # process death. 6640: exit; 6641: 6642: } 6643: # 6644: # Determine if a user is an author for the indicated domain. 6645: # 6646: # Parameters: 6647: # domain - domain to check in . 6648: # user - Name of user to check. 6649: # 6650: # Return: 6651: # 1 - User is an author for domain. 6652: # 0 - User is not an author for domain. 6653: sub is_author { 6654: my ($domain, $user) = @_; 6655: 6656: &Debug("is_author: $user @ $domain"); 6657: 6658: my $hashref = &tie_user_hash($domain, $user, "roles", 6659: &GDBM_READER()); 6660: 6661: # Author role should show up as a key /domain/_au 6662: 6663: my $key = "/$domain/_au"; 6664: my $value; 6665: if (defined($hashref)) { 6666: $value = $hashref->{$key}; 6667: } 6668: 6669: if(defined($value)) { 6670: &Debug("$user @ $domain is an author"); 6671: } 6672: 6673: return defined($value); 6674: } 6675: # 6676: # Checks to see if the input roleput request was to set 6677: # an author role. If so, invokes the lchtmldir script to set 6678: # up a correct public_html 6679: # Parameters: 6680: # request - The request sent to the rolesput subchunk. 6681: # We're looking for /domain/_au 6682: # domain - The domain in which the user is having roles doctored. 6683: # user - Name of the user for which the role is being put. 6684: # authtype - The authentication type associated with the user. 6685: # 6686: sub manage_permissions { 6687: my ($request, $domain, $user, $authtype) = @_; 6688: 6689: &Debug("manage_permissions: $request $domain $user $authtype"); 6690: 6691: # See if the request is of the form /$domain/_au 6692: if($request =~ /^(\/\Q$domain\E\/_au)$/) { # It's an author rolesput... 6693: my $execdir = $perlvar{'lonDaemons'}; 6694: my $userhome= "/home/$user" ; 6695: &logthis("system $execdir/lchtmldir $userhome $user $authtype"); 6696: &Debug("Setting homedir permissions for $userhome"); 6697: system("$execdir/lchtmldir $userhome $user $authtype"); 6698: } 6699: } 6700: 6701: 6702: # 6703: # Return the full path of a user password file, whether it exists or not. 6704: # Parameters: 6705: # domain - Domain in which the password file lives. 6706: # user - name of the user. 6707: # Returns: 6708: # Full passwd path: 6709: # 6710: sub password_path { 6711: my ($domain, $user) = @_; 6712: return &propath($domain, $user).'/passwd'; 6713: } 6714: 6715: # Password Filename 6716: # Returns the path to a passwd file given domain and user... only if 6717: # it exists. 6718: # Parameters: 6719: # domain - Domain in which to search. 6720: # user - username. 6721: # Returns: 6722: # - If the password file exists returns its path. 6723: # - If the password file does not exist, returns undefined. 6724: # 6725: sub password_filename { 6726: my ($domain, $user) = @_; 6727: 6728: Debug ("PasswordFilename called: dom = $domain user = $user"); 6729: 6730: my $path = &password_path($domain, $user); 6731: Debug("PasswordFilename got path: $path"); 6732: if(-e $path) { 6733: return $path; 6734: } else { 6735: return undef; 6736: } 6737: } 6738: 6739: # 6740: # Rewrite the contents of the user's passwd file. 6741: # Parameters: 6742: # domain - domain of the user. 6743: # name - User's name. 6744: # contents - New contents of the file. 6745: # Returns: 6746: # 0 - Failed. 6747: # 1 - Success. 6748: # 6749: sub rewrite_password_file { 6750: my ($domain, $user, $contents) = @_; 6751: 6752: my $file = &password_filename($domain, $user); 6753: if (defined $file) { 6754: my $pf = IO::File->new(">$file"); 6755: if($pf) { 6756: print $pf "$contents\n"; 6757: return 1; 6758: } else { 6759: return 0; 6760: } 6761: } else { 6762: return 0; 6763: } 6764: 6765: } 6766: 6767: # 6768: # get_auth_type - Determines the authorization type of a user in a domain. 6769: 6770: # Returns the authorization type or nouser if there is no such user. 6771: # 6772: sub get_auth_type { 6773: my ($domain, $user) = @_; 6774: 6775: Debug("get_auth_type( $domain, $user ) \n"); 6776: my $proname = &propath($domain, $user); 6777: my $passwdfile = "$proname/passwd"; 6778: if( -e $passwdfile ) { 6779: my $pf = IO::File->new($passwdfile); 6780: my $realpassword = <$pf>; 6781: chomp($realpassword); 6782: Debug("Password info = $realpassword\n"); 6783: my ($authtype, $contentpwd) = split(/:/, $realpassword); 6784: Debug("Authtype = $authtype, content = $contentpwd\n"); 6785: return "$authtype:$contentpwd"; 6786: } else { 6787: Debug("Returning nouser"); 6788: return "nouser"; 6789: } 6790: } 6791: 6792: # 6793: # Validate a user given their domain, name and password. This utility 6794: # function is used by both AuthenticateHandler and ChangePasswordHandler 6795: # to validate the login credentials of a user. 6796: # Parameters: 6797: # $domain - The domain being logged into (this is required due to 6798: # the capability for multihomed systems. 6799: # $user - The name of the user being validated. 6800: # $password - The user's propoposed password. 6801: # 6802: # Returns: 6803: # 1 - The domain,user,pasword triplet corresponds to a valid 6804: # user. 6805: # 0 - The domain,user,password triplet is not a valid user. 6806: # 6807: sub validate_user { 6808: my ($domain, $user, $password, $checkdefauth) = @_; 6809: 6810: # Why negative ~pi you may well ask? Well this function is about 6811: # authentication, and therefore very important to get right. 6812: # I've initialized the flag that determines whether or not I've 6813: # validated correctly to a value it's not supposed to get. 6814: # At the end of this function. I'll ensure that it's not still that 6815: # value so we don't just wind up returning some accidental value 6816: # as a result of executing an unforseen code path that 6817: # did not set $validated. At the end of valid execution paths, 6818: # validated shoule be 1 for success or 0 for failuer. 6819: 6820: my $validated = -3.14159; 6821: 6822: # How we authenticate is determined by the type of authentication 6823: # the user has been assigned. If the authentication type is 6824: # "nouser", the user does not exist so we will return 0. 6825: 6826: my $contents = &get_auth_type($domain, $user); 6827: my ($howpwd, $contentpwd) = split(/:/, $contents); 6828: 6829: my $null = pack("C",0); # Used by kerberos auth types. 6830: 6831: if ($howpwd eq 'nouser') { 6832: if ($checkdefauth) { 6833: my %domdefaults = &Apache::lonnet::get_domain_defaults($domain); 6834: if ($domdefaults{'auth_def'} eq 'localauth') { 6835: $howpwd = $domdefaults{'auth_def'}; 6836: $contentpwd = $domdefaults{'auth_arg_def'}; 6837: } elsif ((($domdefaults{'auth_def'} eq 'krb4') || 6838: ($domdefaults{'auth_def'} eq 'krb5')) && 6839: ($domdefaults{'auth_arg_def'} ne '')) { 6840: $howpwd = $domdefaults{'auth_def'}; 6841: $contentpwd = $domdefaults{'auth_arg_def'}; 6842: } 6843: } 6844: } 6845: if ($howpwd ne 'nouser') { 6846: if($howpwd eq "internal") { # Encrypted is in local password file. 6847: $validated = (crypt($password, $contentpwd) eq $contentpwd); 6848: } 6849: elsif ($howpwd eq "unix") { # User is a normal unix user. 6850: $contentpwd = (getpwnam($user))[1]; 6851: if($contentpwd) { 6852: if($contentpwd eq 'x') { # Shadow password file... 6853: my $pwauth_path = "/usr/local/sbin/pwauth"; 6854: open PWAUTH, "|$pwauth_path" or 6855: die "Cannot invoke authentication"; 6856: print PWAUTH "$user\n$password\n"; 6857: close PWAUTH; 6858: $validated = ! $?; 6859: 6860: } else { # Passwords in /etc/passwd. 6861: $validated = (crypt($password, 6862: $contentpwd) eq $contentpwd); 6863: } 6864: } else { 6865: $validated = 0; 6866: } 6867: } elsif ($howpwd eq "krb4") { # user is in kerberos 4 auth. domain. 6868: my $checkwithkrb5 = 0; 6869: if ($dist =~/^fedora(\d+)$/) { 6870: if ($1 > 11) { 6871: $checkwithkrb5 = 1; 6872: } 6873: } elsif ($dist =~ /^suse([\d.]+)$/) { 6874: if ($1 > 11.1) { 6875: $checkwithkrb5 = 1; 6876: } 6877: } 6878: if ($checkwithkrb5) { 6879: $validated = &krb5_authen($password,$null,$user,$contentpwd); 6880: } else { 6881: $validated = &krb4_authen($password,$null,$user,$contentpwd); 6882: } 6883: } elsif ($howpwd eq "krb5") { # User is in kerberos 5 auth. domain. 6884: $validated = &krb5_authen($password,$null,$user,$contentpwd); 6885: } elsif ($howpwd eq "localauth") { 6886: # Authenticate via installation specific authentcation method: 6887: $validated = &localauth::localauth($user, 6888: $password, 6889: $contentpwd, 6890: $domain); 6891: if ($validated < 0) { 6892: &logthis("localauth for $contentpwd $user:$domain returned a $validated"); 6893: $validated = 0; 6894: } 6895: } else { # Unrecognized auth is also bad. 6896: $validated = 0; 6897: } 6898: } else { 6899: $validated = 0; 6900: } 6901: # 6902: # $validated has the correct stat of the authentication: 6903: # 6904: 6905: unless ($validated != -3.14159) { 6906: # I >really really< want to know if this happens. 6907: # since it indicates that user authentication is badly 6908: # broken in some code path. 6909: # 6910: die "ValidateUser - failed to set the value of validated $domain, $user $password"; 6911: } 6912: return $validated; 6913: } 6914: 6915: sub krb4_authen { 6916: my ($password,$null,$user,$contentpwd) = @_; 6917: my $validated = 0; 6918: if (!($password =~ /$null/) ) { # Null password not allowed. 6919: eval { 6920: require Authen::Krb4; 6921: }; 6922: if (!$@) { 6923: my $k4error = &Authen::Krb4::get_pw_in_tkt($user, 6924: "", 6925: $contentpwd,, 6926: 'krbtgt', 6927: $contentpwd, 6928: 1, 6929: $password); 6930: if(!$k4error) { 6931: $validated = 1; 6932: } else { 6933: $validated = 0; 6934: &logthis('krb4: '.$user.', '.$contentpwd.', '. 6935: &Authen::Krb4::get_err_txt($Authen::Krb4::error)); 6936: } 6937: } else { 6938: $validated = krb5_authen($password,$null,$user,$contentpwd); 6939: } 6940: } 6941: return $validated; 6942: } 6943: 6944: sub krb5_authen { 6945: my ($password,$null,$user,$contentpwd) = @_; 6946: my $validated = 0; 6947: if(!($password =~ /$null/)) { # Null password not allowed. 6948: my $krbclient = &Authen::Krb5::parse_name($user.'@' 6949: .$contentpwd); 6950: my $krbservice = "krbtgt/".$contentpwd."\@".$contentpwd; 6951: my $krbserver = &Authen::Krb5::parse_name($krbservice); 6952: my $credentials= &Authen::Krb5::cc_default(); 6953: $credentials->initialize(&Authen::Krb5::parse_name($user.'@' 6954: .$contentpwd)); 6955: my $krbreturn; 6956: if (exists(&Authen::Krb5::get_init_creds_password)) { 6957: $krbreturn = 6958: &Authen::Krb5::get_init_creds_password($krbclient,$password, 6959: $krbservice); 6960: $validated = (ref($krbreturn) eq 'Authen::Krb5::Creds'); 6961: } else { 6962: $krbreturn = 6963: &Authen::Krb5::get_in_tkt_with_password($krbclient,$krbserver, 6964: $password,$credentials); 6965: $validated = ($krbreturn == 1); 6966: } 6967: if (!$validated) { 6968: &logthis('krb5: '.$user.', '.$contentpwd.', '. 6969: &Authen::Krb5::error()); 6970: } 6971: } 6972: return $validated; 6973: } 6974: 6975: sub addline { 6976: my ($fname,$hostid,$ip,$newline)=@_; 6977: my $contents; 6978: my $found=0; 6979: my $expr='^'.quotemeta($hostid).':'.quotemeta($ip).':'; 6980: my $sh; 6981: if ($sh=IO::File->new("$fname.subscription")) { 6982: while (my $subline=<$sh>) { 6983: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;} 6984: } 6985: $sh->close(); 6986: } 6987: $sh=IO::File->new(">$fname.subscription"); 6988: if ($contents) { print $sh $contents; } 6989: if ($newline) { print $sh $newline; } 6990: $sh->close(); 6991: return $found; 6992: } 6993: 6994: sub get_chat { 6995: my ($cdom,$cname,$udom,$uname,$group)=@_; 6996: 6997: my @entries=(); 6998: my $namespace = 'nohist_chatroom'; 6999: my $namespace_inroom = 'nohist_inchatroom'; 7000: if ($group ne '') { 7001: $namespace .= '_'.$group; 7002: $namespace_inroom .= '_'.$group; 7003: } 7004: my $hashref = &tie_user_hash($cdom, $cname, $namespace, 7005: &GDBM_READER()); 7006: if ($hashref) { 7007: @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref)); 7008: &untie_user_hash($hashref); 7009: } 7010: my @participants=(); 7011: my $cutoff=time-60; 7012: $hashref = &tie_user_hash($cdom, $cname, $namespace_inroom, 7013: &GDBM_WRCREAT()); 7014: if ($hashref) { 7015: $hashref->{$uname.':'.$udom}=time; 7016: foreach my $user (sort(keys(%$hashref))) { 7017: if ($hashref->{$user}>$cutoff) { 7018: push(@participants, 'active_participant:'.$user); 7019: } 7020: } 7021: &untie_user_hash($hashref); 7022: } 7023: return (@participants,@entries); 7024: } 7025: 7026: sub chat_add { 7027: my ($cdom,$cname,$newchat,$group)=@_; 7028: my @entries=(); 7029: my $time=time; 7030: my $namespace = 'nohist_chatroom'; 7031: my $logfile = 'chatroom.log'; 7032: if ($group ne '') { 7033: $namespace .= '_'.$group; 7034: $logfile = 'chatroom_'.$group.'.log'; 7035: } 7036: my $hashref = &tie_user_hash($cdom, $cname, $namespace, 7037: &GDBM_WRCREAT()); 7038: if ($hashref) { 7039: @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref)); 7040: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/); 7041: my ($thentime,$idnum)=split(/\_/,$lastid); 7042: my $newid=$time.'_000000'; 7043: if ($thentime==$time) { 7044: $idnum=~s/^0+//; 7045: $idnum++; 7046: $idnum=substr('000000'.$idnum,-6,6); 7047: $newid=$time.'_'.$idnum; 7048: } 7049: $hashref->{$newid}=$newchat; 7050: my $expired=$time-3600; 7051: foreach my $comment (keys(%$hashref)) { 7052: my ($thistime) = ($comment=~/(\d+)\_/); 7053: if ($thistime<$expired) { 7054: delete $hashref->{$comment}; 7055: } 7056: } 7057: { 7058: my $proname=&propath($cdom,$cname); 7059: if (open(CHATLOG,">>$proname/$logfile")) { 7060: print CHATLOG ("$time:".&unescape($newchat)."\n"); 7061: } 7062: close(CHATLOG); 7063: } 7064: &untie_user_hash($hashref); 7065: } 7066: } 7067: 7068: sub unsub { 7069: my ($fname,$clientip)=@_; 7070: my $result; 7071: my $unsubs = 0; # Number of successful unsubscribes: 7072: 7073: 7074: # An old way subscriptions were handled was to have a 7075: # subscription marker file: 7076: 7077: Debug("Attempting unlink of $fname.$clientname"); 7078: if (unlink("$fname.$clientname")) { 7079: $unsubs++; # Successful unsub via marker file. 7080: } 7081: 7082: # The more modern way to do it is to have a subscription list 7083: # file: 7084: 7085: if (-e "$fname.subscription") { 7086: my $found=&addline($fname,$clientname,$clientip,''); 7087: if ($found) { 7088: $unsubs++; 7089: } 7090: } 7091: 7092: # If either or both of these mechanisms succeeded in unsubscribing a 7093: # resource we can return ok: 7094: 7095: if($unsubs) { 7096: $result = "ok\n"; 7097: } else { 7098: $result = "not_subscribed\n"; 7099: } 7100: 7101: return $result; 7102: } 7103: 7104: sub currentversion { 7105: my $fname=shift; 7106: my $version=-1; 7107: my $ulsdir=''; 7108: if ($fname=~/^(.+)\/[^\/]+$/) { 7109: $ulsdir=$1; 7110: } 7111: my ($fnamere1,$fnamere2); 7112: # remove version if already specified 7113: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/; 7114: # get the bits that go before and after the version number 7115: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) { 7116: $fnamere1=$1; 7117: $fnamere2='.'.$2; 7118: } 7119: if (-e $fname) { $version=1; } 7120: if (-e $ulsdir) { 7121: if(-d $ulsdir) { 7122: if (opendir(LSDIR,$ulsdir)) { 7123: my $ulsfn; 7124: while ($ulsfn=readdir(LSDIR)) { 7125: # see if this is a regular file (ignore links produced earlier) 7126: my $thisfile=$ulsdir.'/'.$ulsfn; 7127: unless (-l $thisfile) { 7128: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) { 7129: if ($1>$version) { $version=$1; } 7130: } 7131: } 7132: } 7133: closedir(LSDIR); 7134: $version++; 7135: } 7136: } 7137: } 7138: return $version; 7139: } 7140: 7141: sub thisversion { 7142: my $fname=shift; 7143: my $version=-1; 7144: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) { 7145: $version=$1; 7146: } 7147: return $version; 7148: } 7149: 7150: sub subscribe { 7151: my ($userinput,$clientip)=@_; 7152: my $result; 7153: my ($cmd,$fname)=split(/:/,$userinput,2); 7154: my $ownership=&ishome($fname); 7155: if ($ownership eq 'owner') { 7156: # explitly asking for the current version? 7157: unless (-e $fname) { 7158: my $currentversion=&currentversion($fname); 7159: if (&thisversion($fname)==$currentversion) { 7160: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) { 7161: my $root=$1; 7162: my $extension=$2; 7163: symlink($root.'.'.$extension, 7164: $root.'.'.$currentversion.'.'.$extension); 7165: unless ($extension=~/\.meta$/) { 7166: symlink($root.'.'.$extension.'.meta', 7167: $root.'.'.$currentversion.'.'.$extension.'.meta'); 7168: } 7169: } 7170: } 7171: } 7172: if (-e $fname) { 7173: if (-d $fname) { 7174: $result="directory\n"; 7175: } else { 7176: if (-e "$fname.$clientname") {&unsub($fname,$clientip);} 7177: my $now=time; 7178: my $found=&addline($fname,$clientname,$clientip, 7179: "$clientname:$clientip:$now\n"); 7180: if ($found) { $result="$fname\n"; } 7181: # if they were subscribed to only meta data, delete that 7182: # subscription, when you subscribe to a file you also get 7183: # the metadata 7184: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); } 7185: $fname=~s/\/home\/httpd\/html\/res/raw/; 7186: $fname="http://".&Apache::lonnet::hostname($perlvar{'lonHostID'})."/".$fname; 7187: $result="$fname\n"; 7188: } 7189: } else { 7190: $result="not_found\n"; 7191: } 7192: } else { 7193: $result="rejected\n"; 7194: } 7195: return $result; 7196: } 7197: # Change the passwd of a unix user. The caller must have 7198: # first verified that the user is a loncapa user. 7199: # 7200: # Parameters: 7201: # user - Unix user name to change. 7202: # pass - New password for the user. 7203: # Returns: 7204: # ok - if success 7205: # other - Some meaningfule error message string. 7206: # NOTE: 7207: # invokes a setuid script to change the passwd. 7208: sub change_unix_password { 7209: my ($user, $pass) = @_; 7210: 7211: &Debug("change_unix_password"); 7212: my $execdir=$perlvar{'lonDaemons'}; 7213: &Debug("Opening lcpasswd pipeline"); 7214: my $pf = IO::File->new("|$execdir/lcpasswd > " 7215: ."$perlvar{'lonDaemons'}" 7216: ."/logs/lcpasswd.log"); 7217: print $pf "$user\n$pass\n$pass\n"; 7218: close $pf; 7219: my $err = $?; 7220: return ($err < @passwderrors) ? $passwderrors[$err] : 7221: "pwchange_falure - unknown error"; 7222: 7223: 7224: } 7225: 7226: 7227: sub make_passwd_file { 7228: my ($uname, $umode,$npass,$passfilename)=@_; 7229: my $result="ok"; 7230: if ($umode eq 'krb4' or $umode eq 'krb5') { 7231: { 7232: my $pf = IO::File->new(">$passfilename"); 7233: if ($pf) { 7234: print $pf "$umode:$npass\n"; 7235: } else { 7236: $result = "pass_file_failed_error"; 7237: } 7238: } 7239: } elsif ($umode eq 'internal') { 7240: my $salt=time; 7241: $salt=substr($salt,6,2); 7242: my $ncpass=crypt($npass,$salt); 7243: { 7244: &Debug("Creating internal auth"); 7245: my $pf = IO::File->new(">$passfilename"); 7246: if($pf) { 7247: print $pf "internal:$ncpass\n"; 7248: } else { 7249: $result = "pass_file_failed_error"; 7250: } 7251: } 7252: } elsif ($umode eq 'localauth') { 7253: { 7254: my $pf = IO::File->new(">$passfilename"); 7255: if($pf) { 7256: print $pf "localauth:$npass\n"; 7257: } else { 7258: $result = "pass_file_failed_error"; 7259: } 7260: } 7261: } elsif ($umode eq 'unix') { 7262: { 7263: # 7264: # Don't allow the creation of privileged accounts!!! that would 7265: # be real bad!!! 7266: # 7267: my $uid = getpwnam($uname); 7268: if((defined $uid) && ($uid == 0)) { 7269: &logthis(">>>Attempted to create privilged account blocked"); 7270: return "no_priv_account_error\n"; 7271: } 7272: 7273: my $execpath ="$perlvar{'lonDaemons'}/"."lcuseradd"; 7274: 7275: my $lc_error_file = $execdir."/tmp/lcuseradd".$$.".status"; 7276: { 7277: &Debug("Executing external: ".$execpath); 7278: &Debug("user = ".$uname.", Password =". $npass); 7279: my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log"); 7280: print $se "$uname\n"; 7281: print $se "$npass\n"; 7282: print $se "$npass\n"; 7283: print $se "$lc_error_file\n"; # Status -> unique file. 7284: } 7285: if (-r $lc_error_file) { 7286: &Debug("Opening error file: $lc_error_file"); 7287: my $error = IO::File->new("< $lc_error_file"); 7288: my $useraddok = <$error>; 7289: $error->close; 7290: unlink($lc_error_file); 7291: 7292: chomp $useraddok; 7293: 7294: if($useraddok > 0) { 7295: my $error_text = &lcuseraddstrerror($useraddok); 7296: &logthis("Failed lcuseradd: $error_text"); 7297: $result = "lcuseradd_failed:$error_text"; 7298: } else { 7299: my $pf = IO::File->new(">$passfilename"); 7300: if($pf) { 7301: print $pf "unix:\n"; 7302: } else { 7303: $result = "pass_file_failed_error"; 7304: } 7305: } 7306: } else { 7307: &Debug("Could not locate lcuseradd error: $lc_error_file"); 7308: $result="bug_lcuseradd_no_output_file"; 7309: } 7310: } 7311: } elsif ($umode eq 'none') { 7312: { 7313: my $pf = IO::File->new("> $passfilename"); 7314: if($pf) { 7315: print $pf "none:\n"; 7316: } else { 7317: $result = "pass_file_failed_error"; 7318: } 7319: } 7320: } else { 7321: $result="auth_mode_error"; 7322: } 7323: return $result; 7324: } 7325: 7326: sub convert_photo { 7327: my ($start,$dest)=@_; 7328: system("convert $start $dest"); 7329: } 7330: 7331: sub sethost { 7332: my ($remotereq) = @_; 7333: my (undef,$hostid)=split(/:/,$remotereq); 7334: # ignore sethost if we are already correct 7335: if ($hostid eq $currenthostid) { 7336: return 'ok'; 7337: } 7338: 7339: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; } 7340: if (&Apache::lonnet::get_host_ip($perlvar{'lonHostID'}) 7341: eq &Apache::lonnet::get_host_ip($hostid)) { 7342: $currenthostid =$hostid; 7343: $currentdomainid=&Apache::lonnet::host_domain($hostid); 7344: # &logthis("Setting hostid to $hostid, and domain to $currentdomainid"); 7345: } else { 7346: &logthis("Requested host id $hostid not an alias of ". 7347: $perlvar{'lonHostID'}." refusing connection"); 7348: return 'unable_to_set'; 7349: } 7350: return 'ok'; 7351: } 7352: 7353: sub version { 7354: my ($userinput)=@_; 7355: $remoteVERSION=(split(/:/,$userinput))[1]; 7356: return "version:$VERSION"; 7357: } 7358: 7359: sub get_usersession_config { 7360: my ($dom,$name) = @_; 7361: my ($usersessionconf,$cached)=&Apache::lonnet::is_cached_new($name,$dom); 7362: if (defined($cached)) { 7363: return $usersessionconf; 7364: } else { 7365: my %domconfig = &Apache::lonnet::get_dom('configuration',['usersessions'],$dom); 7366: if (ref($domconfig{'usersessions'}) eq 'HASH') { 7367: &Apache::lonnet::do_cache_new($name,$dom,$domconfig{'usersessions'},3600); 7368: return $domconfig{'usersessions'}; 7369: } 7370: } 7371: return; 7372: } 7373: 7374: sub releasereqd_check { 7375: my ($cnum,$cdom,$key,$value,$major,$minor,$homecourses,$ids) = @_; 7376: my $home = &Apache::lonnet::homeserver($cnum,$cdom); 7377: return if ($home eq 'no_host'); 7378: my ($reqdmajor,$reqdminor,$displayrole); 7379: if ($cnum =~ /$LONCAPA::match_community/) { 7380: if ($major eq '' && $minor eq '') { 7381: return unless ((ref($ids) eq 'ARRAY') && 7382: (grep(/^\Q$home\E$/,@{$ids}))); 7383: } else { 7384: $reqdmajor = 2; 7385: $reqdminor = 9; 7386: return unless (&useable_role($reqdmajor,$reqdminor,$major,$minor)); 7387: } 7388: } 7389: my $hashid = $cdom.':'.$cnum; 7390: my ($courseinfo,$cached) = 7391: &Apache::lonnet::is_cached_new('courseinfo',$hashid); 7392: if (defined($cached)) { 7393: if (ref($courseinfo) eq 'HASH') { 7394: if (exists($courseinfo->{'releaserequired'})) { 7395: my ($reqdmajor,$reqdminor) = split(/\./,$courseinfo->{'releaserequired'}); 7396: return unless (&useable_role($reqdmajor,$reqdminor,$major,$minor)); 7397: } 7398: } 7399: } else { 7400: if (ref($ids) eq 'ARRAY') { 7401: if (grep(/^\Q$home\E$/,@{$ids})) { 7402: if (ref($homecourses) eq 'HASH') { 7403: if (ref($homecourses->{$hashid}) eq 'ARRAY') { 7404: push(@{$homecourses->{$hashid}},{$key=>$value}); 7405: } else { 7406: $homecourses->{$hashid} = [{$key=>$value}]; 7407: } 7408: } 7409: return; 7410: } 7411: } 7412: my $courseinfo = &get_courseinfo_hash($cnum,$cdom,$home); 7413: if (ref($courseinfo) eq 'HASH') { 7414: if (exists($courseinfo->{'releaserequired'})) { 7415: my ($reqdmajor,$reqdminor) = split(/\./,$courseinfo->{'releaserequired'}); 7416: return unless (&useable_role($reqdmajor,$reqdminor,$major,$minor)); 7417: } 7418: } else { 7419: return; 7420: } 7421: } 7422: return 1; 7423: } 7424: 7425: sub get_courseinfo_hash { 7426: my ($cnum,$cdom,$home) = @_; 7427: my %info; 7428: eval { 7429: local($SIG{ALRM}) = sub { die "timeout\n"; }; 7430: local($SIG{__DIE__})='DEFAULT'; 7431: alarm(3); 7432: %info = &Apache::lonnet::courseiddump($cdom,'.',1,'.','.',$cnum,1,[$home],'.'); 7433: alarm(0); 7434: }; 7435: if ($@) { 7436: if ($@ eq "timeout\n") { 7437: &logthis("WARNING courseiddump for $cnum:$cdom from $home timedout"); 7438: } else { 7439: &logthis("WARNING unexpected error during eval of call for courseiddump from $home"); 7440: } 7441: } else { 7442: if (ref($info{$cdom.'_'.$cnum}) eq 'HASH') { 7443: my $hashid = $cdom.':'.$cnum; 7444: return &Apache::lonnet::do_cache_new('courseinfo',$hashid,$info{$cdom.'_'.$cnum},600); 7445: } 7446: } 7447: return; 7448: } 7449: 7450: sub check_homecourses { 7451: my ($homecourses,$udom,$regexp,$count,$range,$start,$end,$major,$minor) = @_; 7452: my ($result,%addtocache); 7453: my $yesterday = time - 24*3600; 7454: if (ref($homecourses) eq 'HASH') { 7455: my (%okcourses,%courseinfo,%recent); 7456: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT()); 7457: if ($hashref) { 7458: while (my ($key,$value) = each(%$hashref)) { 7459: my $unesc_key = &unescape($key); 7460: if ($unesc_key =~ /^lasttime:(\w+)$/) { 7461: my $cid = $1; 7462: $cid =~ s/_/:/; 7463: if ($value > $yesterday ) { 7464: $recent{$cid} = 1; 7465: } 7466: next; 7467: } 7468: my $items = &Apache::lonnet::thaw_unescape($value); 7469: if (ref($items) eq 'HASH') { 7470: my $hashid = $unesc_key; 7471: $hashid =~ s/_/:/; 7472: $courseinfo{$hashid} = $items; 7473: if (ref($homecourses->{$hashid}) eq 'ARRAY') { 7474: my ($reqdmajor,$reqdminor) = split(/\./,$items->{'releaserequired'}); 7475: if (&useable_role($reqdmajor,$reqdminor,$major,$minor)) { 7476: $okcourses{$hashid} = 1; 7477: } 7478: } 7479: } 7480: } 7481: unless (&untie_domain_hash($hashref)) { 7482: &logthis('Failed to untie tied hash for nohist_courseids.db'); 7483: } 7484: } else { 7485: &logthis('Failed to tie hash for nohist_courseids.db'); 7486: return; 7487: } 7488: foreach my $hashid (keys(%recent)) { 7489: my ($result,$cached)=&Apache::lonnet::is_cached_new('courseinfo',$hashid); 7490: unless ($cached) { 7491: &Apache::lonnet::do_cache_new('courseinfo',$hashid,$courseinfo{$hashid},600); 7492: } 7493: } 7494: foreach my $hashid (keys(%{$homecourses})) { 7495: next if ($recent{$hashid}); 7496: &Apache::lonnet::do_cache_new('courseinfo',$hashid,$courseinfo{$hashid},600); 7497: } 7498: foreach my $hashid (keys(%okcourses)) { 7499: if (ref($homecourses->{$hashid}) eq 'ARRAY') { 7500: foreach my $role (@{$homecourses->{$hashid}}) { 7501: if (ref($role) eq 'HASH') { 7502: while (my ($key,$value) = each(%{$role})) { 7503: if ($regexp eq '.') { 7504: $count++; 7505: if (defined($range) && $count >= $end) { last; } 7506: if (defined($range) && $count < $start) { next; } 7507: $result.=$key.'='.$value.'&'; 7508: } else { 7509: my $unescapeKey = &unescape($key); 7510: if (eval('$unescapeKey=~/$regexp/')) { 7511: $count++; 7512: if (defined($range) && $count >= $end) { last; } 7513: if (defined($range) && $count < $start) { next; } 7514: $result.="$key=$value&"; 7515: } 7516: } 7517: } 7518: } 7519: } 7520: } 7521: } 7522: } 7523: return $result; 7524: } 7525: 7526: sub useable_role { 7527: my ($reqdmajor,$reqdminor,$major,$minor) = @_; 7528: if ($reqdmajor ne '' && $reqdminor ne '') { 7529: return if (($major eq '' && $minor eq '') || 7530: ($major < $reqdmajor) || 7531: (($major == $reqdmajor) && ($minor < $reqdminor))); 7532: } 7533: return 1; 7534: } 7535: 7536: sub distro_and_arch { 7537: return $dist.':'.$arch; 7538: } 7539: 7540: # ----------------------------------- POD (plain old documentation, CPAN style) 7541: 7542: =head1 NAME 7543: 7544: lond - "LON Daemon" Server (port "LOND" 5663) 7545: 7546: =head1 SYNOPSIS 7547: 7548: Usage: B<lond> 7549: 7550: Should only be run as user=www. This is a command-line script which 7551: is invoked by B<loncron>. There is no expectation that a typical user 7552: will manually start B<lond> from the command-line. (In other words, 7553: DO NOT START B<lond> YOURSELF.) 7554: 7555: =head1 DESCRIPTION 7556: 7557: There are two characteristics associated with the running of B<lond>, 7558: PROCESS MANAGEMENT (starting, stopping, handling child processes) 7559: and SERVER-SIDE ACTIVITIES (password authentication, user creation, 7560: subscriptions, etc). These are described in two large 7561: sections below. 7562: 7563: B<PROCESS MANAGEMENT> 7564: 7565: Preforker - server who forks first. Runs as a daemon. HUPs. 7566: Uses IDEA encryption 7567: 7568: B<lond> forks off children processes that correspond to the other servers 7569: in the network. Management of these processes can be done at the 7570: parent process level or the child process level. 7571: 7572: B<logs/lond.log> is the location of log messages. 7573: 7574: The process management is now explained in terms of linux shell commands, 7575: subroutines internal to this code, and signal assignments: 7576: 7577: =over 4 7578: 7579: =item * 7580: 7581: PID is stored in B<logs/lond.pid> 7582: 7583: This is the process id number of the parent B<lond> process. 7584: 7585: =item * 7586: 7587: SIGTERM and SIGINT 7588: 7589: Parent signal assignment: 7590: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN; 7591: 7592: Child signal assignment: 7593: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also) 7594: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber 7595: to restart a new child.) 7596: 7597: Command-line invocations: 7598: B<kill> B<-s> SIGTERM I<PID> 7599: B<kill> B<-s> SIGINT I<PID> 7600: 7601: Subroutine B<HUNTSMAN>: 7602: This is only invoked for the B<lond> parent I<PID>. 7603: This kills all the children, and then the parent. 7604: The B<lonc.pid> file is cleared. 7605: 7606: =item * 7607: 7608: SIGHUP 7609: 7610: Current bug: 7611: This signal can only be processed the first time 7612: on the parent process. Subsequent SIGHUP signals 7613: have no effect. 7614: 7615: Parent signal assignment: 7616: $SIG{HUP} = \&HUPSMAN; 7617: 7618: Child signal assignment: 7619: none (nothing happens) 7620: 7621: Command-line invocations: 7622: B<kill> B<-s> SIGHUP I<PID> 7623: 7624: Subroutine B<HUPSMAN>: 7625: This is only invoked for the B<lond> parent I<PID>, 7626: This kills all the children, and then the parent. 7627: The B<lond.pid> file is cleared. 7628: 7629: =item * 7630: 7631: SIGUSR1 7632: 7633: Parent signal assignment: 7634: $SIG{USR1} = \&USRMAN; 7635: 7636: Child signal assignment: 7637: $SIG{USR1}= \&logstatus; 7638: 7639: Command-line invocations: 7640: B<kill> B<-s> SIGUSR1 I<PID> 7641: 7642: Subroutine B<USRMAN>: 7643: When invoked for the B<lond> parent I<PID>, 7644: SIGUSR1 is sent to all the children, and the status of 7645: each connection is logged. 7646: 7647: =item * 7648: 7649: SIGUSR2 7650: 7651: Parent Signal assignment: 7652: $SIG{USR2} = \&UpdateHosts 7653: 7654: Child signal assignment: 7655: NONE 7656: 7657: 7658: =item * 7659: 7660: SIGCHLD 7661: 7662: Parent signal assignment: 7663: $SIG{CHLD} = \&REAPER; 7664: 7665: Child signal assignment: 7666: none 7667: 7668: Command-line invocations: 7669: B<kill> B<-s> SIGCHLD I<PID> 7670: 7671: Subroutine B<REAPER>: 7672: This is only invoked for the B<lond> parent I<PID>. 7673: Information pertaining to the child is removed. 7674: The socket port is cleaned up. 7675: 7676: =back 7677: 7678: B<SERVER-SIDE ACTIVITIES> 7679: 7680: Server-side information can be accepted in an encrypted or non-encrypted 7681: method. 7682: 7683: =over 4 7684: 7685: =item ping 7686: 7687: Query a client in the hosts.tab table; "Are you there?" 7688: 7689: =item pong 7690: 7691: Respond to a ping query. 7692: 7693: =item ekey 7694: 7695: Read in encrypted key, make cipher. Respond with a buildkey. 7696: 7697: =item load 7698: 7699: Respond with CPU load based on a computation upon /proc/loadavg. 7700: 7701: =item currentauth 7702: 7703: Reply with current authentication information (only over an 7704: encrypted channel). 7705: 7706: =item auth 7707: 7708: Only over an encrypted channel, reply as to whether a user's 7709: authentication information can be validated. 7710: 7711: =item passwd 7712: 7713: Allow for a password to be set. 7714: 7715: =item makeuser 7716: 7717: Make a user. 7718: 7719: =item passwd 7720: 7721: Allow for authentication mechanism and password to be changed. 7722: 7723: =item home 7724: 7725: Respond to a question "are you the home for a given user?" 7726: 7727: =item update 7728: 7729: Update contents of a subscribed resource. 7730: 7731: =item unsubscribe 7732: 7733: The server is unsubscribing from a resource. 7734: 7735: =item subscribe 7736: 7737: The server is subscribing to a resource. 7738: 7739: =item log 7740: 7741: Place in B<logs/lond.log> 7742: 7743: =item put 7744: 7745: stores hash in namespace 7746: 7747: =item rolesputy 7748: 7749: put a role into a user's environment 7750: 7751: =item get 7752: 7753: returns hash with keys from array 7754: reference filled in from namespace 7755: 7756: =item eget 7757: 7758: returns hash with keys from array 7759: reference filled in from namesp (encrypts the return communication) 7760: 7761: =item rolesget 7762: 7763: get a role from a user's environment 7764: 7765: =item del 7766: 7767: deletes keys out of array from namespace 7768: 7769: =item keys 7770: 7771: returns namespace keys 7772: 7773: =item dump 7774: 7775: dumps the complete (or key matching regexp) namespace into a hash 7776: 7777: =item store 7778: 7779: stores hash permanently 7780: for this url; hashref needs to be given and should be a \%hashname; the 7781: remaining args aren't required and if they aren't passed or are '' they will 7782: be derived from the ENV 7783: 7784: =item restore 7785: 7786: returns a hash for a given url 7787: 7788: =item querysend 7789: 7790: Tells client about the lonsql process that has been launched in response 7791: to a sent query. 7792: 7793: =item queryreply 7794: 7795: Accept information from lonsql and make appropriate storage in temporary 7796: file space. 7797: 7798: =item idput 7799: 7800: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers 7801: for each student, defined perhaps by the institutional Registrar.) 7802: 7803: =item idget 7804: 7805: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers 7806: for each student, defined perhaps by the institutional Registrar.) 7807: 7808: =item tmpput 7809: 7810: Accept and store information in temporary space. 7811: 7812: =item tmpget 7813: 7814: Send along temporarily stored information. 7815: 7816: =item ls 7817: 7818: List part of a user's directory. 7819: 7820: =item pushtable 7821: 7822: Pushes a file in /home/httpd/lonTab directory. Currently limited to: 7823: hosts.tab and domain.tab. The old file is copied to *.tab.backup but 7824: must be restored manually in case of a problem with the new table file. 7825: pushtable requires that the request be encrypted and validated via 7826: ValidateManager. The form of the command is: 7827: enc:pushtable tablename <tablecontents> \n 7828: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a 7829: cleartext newline. 7830: 7831: =item Hanging up (exit or init) 7832: 7833: What to do when a client tells the server that they (the client) 7834: are leaving the network. 7835: 7836: =item unknown command 7837: 7838: If B<lond> is sent an unknown command (not in the list above), 7839: it replys to the client "unknown_cmd". 7840: 7841: 7842: =item UNKNOWN CLIENT 7843: 7844: If the anti-spoofing algorithm cannot verify the client, 7845: the client is rejected (with a "refused" message sent 7846: to the client, and the connection is closed. 7847: 7848: =back 7849: 7850: =head1 PREREQUISITES 7851: 7852: IO::Socket 7853: IO::File 7854: Apache::File 7855: POSIX 7856: Crypt::IDEA 7857: LWP::UserAgent() 7858: GDBM_File 7859: Authen::Krb4 7860: Authen::Krb5 7861: 7862: =head1 COREQUISITES 7863: 7864: =head1 OSNAMES 7865: 7866: linux 7867: 7868: =head1 SCRIPT CATEGORIES 7869: 7870: Server/Process 7871: 7872: =cut 7873: 7874: 7875: =pod 7876: 7877: =head1 LOG MESSAGES 7878: 7879: The messages below can be emitted in the lond log. This log is located 7880: in ~httpd/perl/logs/lond.log Many log messages have HTML encapsulation 7881: to provide coloring if examined from inside a web page. Some do not. 7882: Where color is used, the colors are; Red for sometihhng to get excited 7883: about and to follow up on. Yellow for something to keep an eye on to 7884: be sure it does not get worse, Green,and Blue for informational items. 7885: 7886: In the discussions below, sometimes reference is made to ~httpd 7887: when describing file locations. There isn't really an httpd 7888: user, however there is an httpd directory that gets installed in the 7889: place that user home directories go. On linux, this is usually 7890: (always?) /home/httpd. 7891: 7892: 7893: Some messages are colorless. These are usually (not always) 7894: Green/Blue color level messages. 7895: 7896: =over 2 7897: 7898: =item (Red) LocalConnection rejecting non local: <ip> ne 127.0.0.1 7899: 7900: A local connection negotiation was attempted by 7901: a host whose IP address was not 127.0.0.1. 7902: The socket is closed and the child will exit. 7903: lond has three ways to establish an encyrption 7904: key with a client: 7905: 7906: =over 2 7907: 7908: =item local 7909: 7910: The key is written and read from a file. 7911: This is only valid for connections from localhost. 7912: 7913: =item insecure 7914: 7915: The key is generated by the server and 7916: transmitted to the client. 7917: 7918: =item ssl (secure) 7919: 7920: An ssl connection is negotiated with the client, 7921: the key is generated by the server and sent to the 7922: client across this ssl connection before the 7923: ssl connectionis terminated and clear text 7924: transmission resumes. 7925: 7926: =back 7927: 7928: =item (Red) LocalConnection: caller is insane! init = <init> and type = <type> 7929: 7930: The client is local but has not sent an initialization 7931: string that is the literal "init:local" The connection 7932: is closed and the child exits. 7933: 7934: =item Red CRITICAL Can't get key file <error> 7935: 7936: SSL key negotiation is being attempted but the call to 7937: lonssl::KeyFile failed. This usually means that the 7938: configuration file is not correctly defining or protecting 7939: the directories/files lonCertificateDirectory or 7940: lonnetPrivateKey 7941: <error> is a string that describes the reason that 7942: the key file could not be located. 7943: 7944: =item (Red) CRITICAL Can't get certificates <error> 7945: 7946: SSL key negotiation failed because we were not able to retrives our certificate 7947: or the CA's certificate in the call to lonssl::CertificateFile 7948: <error> is the textual reason this failed. Usual reasons: 7949: 7950: =over 2 7951: 7952: =item Apache config file for loncapa incorrect: 7953: 7954: one of the variables 7955: lonCertificateDirectory, lonnetCertificateAuthority, or lonnetCertificate 7956: undefined or incorrect 7957: 7958: =item Permission error: 7959: 7960: The directory pointed to by lonCertificateDirectory is not readable by lond 7961: 7962: =item Permission error: 7963: 7964: Files in the directory pointed to by lonCertificateDirectory are not readable by lond. 7965: 7966: =item Installation error: 7967: 7968: Either the certificate authority file or the certificate have not 7969: been installed in lonCertificateDirectory. 7970: 7971: =item (Red) CRITICAL SSL Socket promotion failed: <err> 7972: 7973: The promotion of the connection from plaintext to SSL failed 7974: <err> is the reason for the failure. There are two 7975: system calls involved in the promotion (one of which failed), 7976: a dup to produce 7977: a second fd on the raw socket over which the encrypted data 7978: will flow and IO::SOcket::SSL->new_from_fd which creates 7979: the SSL connection on the duped fd. 7980: 7981: =item (Blue) WARNING client did not respond to challenge 7982: 7983: This occurs on an insecure (non SSL) connection negotiation request. 7984: lond generates some number from the time, the PID and sends it to 7985: the client. The client must respond by echoing this information back. 7986: If the client does not do so, that's a violation of the challenge 7987: protocols and the connection will be failed. 7988: 7989: =item (Red) No manager table. Nobody can manage!! 7990: 7991: lond has the concept of privileged hosts that 7992: can perform remote management function such 7993: as update the hosts.tab. The manager hosts 7994: are described in the 7995: ~httpd/lonTabs/managers.tab file. 7996: this message is logged if this file is missing. 7997: 7998: 7999: =item (Green) Registering manager <dnsname> as <cluster_name> with <ipaddress> 8000: 8001: Reports the successful parse and registration 8002: of a specific manager. 8003: 8004: =item Green existing host <clustername:dnsname> 8005: 8006: The manager host is already defined in the hosts.tab 8007: the information in that table, rather than the info in the 8008: manager table will be used to determine the manager's ip. 8009: 8010: =item (Red) Unable to craete <filename> 8011: 8012: lond has been asked to create new versions of an administrative 8013: file (by a manager). When this is done, the new file is created 8014: in a temp file and then renamed into place so that there are always 8015: usable administrative files, even if the update fails. This failure 8016: message means that the temp file could not be created. 8017: The update is abandoned, and the old file is available for use. 8018: 8019: =item (Green) CopyFile from <oldname> to <newname> failed 8020: 8021: In an update of administrative files, the copy of the existing file to a 8022: backup file failed. The installation of the new file may still succeed, 8023: but there will not be a back up file to rever to (this should probably 8024: be yellow). 8025: 8026: =item (Green) Pushfile: backed up <oldname> to <newname> 8027: 8028: See above, the backup of the old administrative file succeeded. 8029: 8030: =item (Red) Pushfile: Unable to install <filename> <reason> 8031: 8032: The new administrative file could not be installed. In this case, 8033: the old administrative file is still in use. 8034: 8035: =item (Green) Installed new < filename>. 8036: 8037: The new administrative file was successfullly installed. 8038: 8039: =item (Red) Reinitializing lond pid=<pid> 8040: 8041: The lonc child process <pid> will be sent a USR2 8042: signal. 8043: 8044: =item (Red) Reinitializing self 8045: 8046: We've been asked to re-read our administrative files,and 8047: are doing so. 8048: 8049: =item (Yellow) error:Invalid process identifier <ident> 8050: 8051: A reinit command was received, but the target part of the 8052: command was not valid. It must be either 8053: 'lond' or 'lonc' but was <ident> 8054: 8055: =item (Green) isValideditCommand checking: Command = <command> Key = <key> newline = <newline> 8056: 8057: Checking to see if lond has been handed a valid edit 8058: command. It is possible the edit command is not valid 8059: in that case there are no log messages to indicate that. 8060: 8061: =item Result of password change for <username> pwchange_success 8062: 8063: The password for <username> was 8064: successfully changed. 8065: 8066: =item Unable to open <user> passwd to change password 8067: 8068: Could not rewrite the 8069: internal password file for a user 8070: 8071: =item Result of password change for <user> : <result> 8072: 8073: A unix password change for <user> was attempted 8074: and the pipe returned <result> 8075: 8076: =item LWP GET: <message> for <fname> (<remoteurl>) 8077: 8078: The lightweight process fetch for a resource failed 8079: with <message> the local filename that should 8080: have existed/been created was <fname> the 8081: corresponding URI: <remoteurl> This is emitted in several 8082: places. 8083: 8084: =item Unable to move <transname> to <destname> 8085: 8086: From fetch_user_file_handler - the user file was replicated but could not 8087: be mv'd to its final location. 8088: 8089: =item Looking for <domain> <username> 8090: 8091: From user_has_session_handler - This should be a Debug call instead 8092: it indicates lond is about to check whether the specified user has a 8093: session active on the specified domain on the local host. 8094: 8095: =item Client <ip> (<name>) hanging up: <input> 8096: 8097: lond has been asked to exit by its client. The <ip> and <name> identify the 8098: client systemand <input> is the full exit command sent to the server. 8099: 8100: =item Red CRITICAL: ABNORMAL EXIT. child <pid> for server <hostname> died through a crass with this error->[<message>]. 8101: 8102: A lond child terminated. NOte that this termination can also occur when the 8103: child receives the QUIT or DIE signals. <pid> is the process id of the child, 8104: <hostname> the host lond is working for, and <message> the reason the child died 8105: to the best of our ability to get it (I would guess that any numeric value 8106: represents and errno value). This is immediately followed by 8107: 8108: =item Famous last words: Catching exception - <log> 8109: 8110: Where log is some recent information about the state of the child. 8111: 8112: =item Red CRITICAL: TIME OUT <pid> 8113: 8114: Some timeout occured for server <pid>. THis is normally a timeout on an LWP 8115: doing an HTTP::GET. 8116: 8117: =item child <pid> died 8118: 8119: The reaper caught a SIGCHILD for the lond child process <pid> 8120: This should be modified to also display the IP of the dying child 8121: $children{$pid} 8122: 8123: =item Unknown child 0 died 8124: A child died but the wait for it returned a pid of zero which really should not 8125: ever happen. 8126: 8127: =item Child <which> - <pid> looks like we missed it's death 8128: 8129: When a sigchild is received, the reaper process checks all children to see if they are 8130: alive. If children are dying quite quickly, the lack of signal queuing can mean 8131: that a signal hearalds the death of more than one child. If so this message indicates 8132: which other one died. <which> is the ip of a dead child 8133: 8134: =item Free socket: <shutdownretval> 8135: 8136: The HUNTSMAN sub was called due to a SIGINT in a child process. The socket is being shutdown. 8137: for whatever reason, <shutdownretval> is printed but in fact shutdown() is not documented 8138: to return anything. This is followed by: 8139: 8140: =item Red CRITICAL: Shutting down 8141: 8142: Just prior to exit. 8143: 8144: =item Free socket: <shutdownretval> 8145: 8146: The HUPSMAN sub was called due to a SIGHUP. all children get killsed, and lond execs itself. 8147: This is followed by: 8148: 8149: =item (Red) CRITICAL: Restarting 8150: 8151: lond is about to exec itself to restart. 8152: 8153: =item (Blue) Updating connections 8154: 8155: (In response to a USR2). All the children (except the one for localhost) 8156: are about to be killed, the hosts tab reread, and Apache reloaded via apachereload. 8157: 8158: =item (Blue) UpdateHosts killing child <pid> for ip <ip> 8159: 8160: Due to USR2 as above. 8161: 8162: =item (Green) keeping child for ip <ip> (pid = <pid>) 8163: 8164: In response to USR2 as above, the child indicated is not being restarted because 8165: it's assumed that we'll always need a child for the localhost. 8166: 8167: 8168: =item Going to check on the children 8169: 8170: Parent is about to check on the health of the child processes. 8171: Note that this is in response to a USR1 sent to the parent lond. 8172: there may be one or more of the next two messages: 8173: 8174: =item <pid> is dead 8175: 8176: A child that we have in our child hash as alive has evidently died. 8177: 8178: =item Child <pid> did not respond 8179: 8180: In the health check the child <pid> did not update/produce a pid_.txt 8181: file when sent it's USR1 signal. That process is killed with a 9 signal, as it's 8182: assumed to be hung in some un-fixable way. 8183: 8184: =item Finished checking children 8185: 8186: Master processs's USR1 processing is cojmplete. 8187: 8188: =item (Red) CRITICAL: ------- Starting ------ 8189: 8190: (There are more '-'s on either side). Lond has forked itself off to 8191: form a new session and is about to start actual initialization. 8192: 8193: =item (Green) Attempting to start child (<client>) 8194: 8195: Started a new child process for <client>. Client is IO::Socket object 8196: connected to the child. This was as a result of a TCP/IP connection from a client. 8197: 8198: =item Unable to determine who caller was, getpeername returned nothing 8199: 8200: In child process initialization. either getpeername returned undef or 8201: a zero sized object was returned. Processing continues, but in my opinion, 8202: this should be cause for the child to exit. 8203: 8204: =item Unable to determine clientip 8205: 8206: In child process initialization. The peer address from getpeername was not defined. 8207: The client address is stored as "Unavailable" and processing continues. 8208: 8209: =item (Yellow) INFO: Connection <ip> <name> connection type = <type> 8210: 8211: In child initialization. A good connectionw as received from <ip>. 8212: 8213: =over 2 8214: 8215: =item <name> 8216: 8217: is the name of the client from hosts.tab. 8218: 8219: =item <type> 8220: 8221: Is the connection type which is either 8222: 8223: =over 2 8224: 8225: =item manager 8226: 8227: The connection is from a manager node, not in hosts.tab 8228: 8229: =item client 8230: 8231: the connection is from a non-manager in the hosts.tab 8232: 8233: =item both 8234: 8235: The connection is from a manager in the hosts.tab. 8236: 8237: =back 8238: 8239: =back 8240: 8241: =item (Blue) Certificates not installed -- trying insecure auth 8242: 8243: One of the certificate file, key file or 8244: certificate authority file could not be found for a client attempting 8245: SSL connection intiation. COnnection will be attemptied in in-secure mode. 8246: (this would be a system with an up to date lond that has not gotten a 8247: certificate from us). 8248: 8249: =item (Green) Successful local authentication 8250: 8251: A local connection successfully negotiated the encryption key. 8252: In this case the IDEA key is in a file (that is hopefully well protected). 8253: 8254: =item (Green) Successful ssl authentication with <client> 8255: 8256: The client (<client> is the peer's name in hosts.tab), has successfully 8257: negotiated an SSL connection with this child process. 8258: 8259: =item (Green) Successful insecure authentication with <client> 8260: 8261: 8262: The client has successfully negotiated an insecure connection withthe child process. 8263: 8264: =item (Yellow) Attempted insecure connection disallowed 8265: 8266: The client attempted and failed to successfully negotiate a successful insecure 8267: connection. This can happen either because the variable londAllowInsecure is false 8268: or undefined, or becuse the child did not successfully echo back the challenge 8269: string. 8270: 8271: 8272: =back 8273: 8274: =back 8275: 8276: 8277: =cut