loncom/lond - view

File: [LON-CAPA] / loncom / lond
Revision 1.551: download - view: text, annotated - select for diffs
Sat Nov 24 16:19:09 2018 UTC (5 years, 6 months ago) by raeburn
Branches: MAIN
CVS tags: HEAD

- Domain config for load balancer to use cookie to record offload target.
  Subsequent requests by same user/browser will send requests to same target
  if remote session still active, and remote node not overloaded.

1: #!/usr/bin/perl 2: # The LearningOnline Network 3: # lond "LON Daemon" Server (port "LOND" 5663) 4: # 5: # $Id: lond,v 1.551 2018/11/24 16:19:09 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: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19: # GNU General Public License for more details. 20: # 21: # You should have received a copy of the GNU General Public License 22: # along with LON-CAPA; if not, write to the Free Software 23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 24: # 25: # /home/httpd/html/adm/gpl.txt 26: # 27: 28: 29: # http://www.lon-capa.org/ 30: # 31: 32: use strict; 33: use lib '/home/httpd/lib/perl/'; 34: use LONCAPA; 35: use LONCAPA::Configuration; 36: use LONCAPA::Lond; 37: 38: use Socket; 39: use IO::Socket; 40: use IO::File; 41: #use Apache::File; 42: use POSIX; 43: use Crypt::IDEA; 44: use HTTP::Request; 45: use Digest::MD5 qw(md5_hex); 46: use GDBM_File; 47: use Authen::Krb5; 48: use localauth; 49: use localenroll; 50: use localstudentphoto; 51: use File::Copy; 52: use File::Find; 53: use LONCAPA::lonlocal; 54: use LONCAPA::lonssl; 55: use Fcntl qw(:flock); 56: use Apache::lonnet; 57: use Mail::Send; 58: use Crypt::Eksblowfish::Bcrypt; 59: use Digest::SHA; 60: use Encode; 61: use LONCAPA::LWPReq; 62: 63: my $DEBUG = 0; # Non zero to enable debug log entries. 64: 65: my $status=''; 66: my $lastlog=''; 67: 68: my $VERSION='$Revision: 1.551 $'; #' stupid emacs 69: my $remoteVERSION; 70: my $currenthostid="default"; 71: my $currentdomainid; 72: 73: my $client; 74: my $clientip; # IP address of client. 75: my $clientname; # LonCAPA name of client. 76: my $clientversion; # LonCAPA version running on client. 77: my $clienthomedom; # LonCAPA domain of homeID for client. 78: my $clientintdom; # LonCAPA "internet domain" for client. 79: my $clientsamedom; # LonCAPA domain same for this host 80: # and client. 81: my $clientsameinst; # LonCAPA "internet domain" same for 82: # this host and client. 83: my $clientremoteok; # Client allowed to host domain's users. 84: # (version constraints ignored), not set 85: # if this host and client share "internet domain". 86: my %clientprohibited; # Actions prohibited on client; 87: 88: my $server; 89: 90: my $keymode; 91: 92: my $cipher; # Cipher key negotiated with client 93: my $tmpsnum = 0; # Id of tmpputs. 94: 95: # 96: # Connection type is: 97: # client - All client actions are allowed 98: # manager - only management functions allowed. 99: # both - Both management and client actions are allowed 100: # 101: 102: my $ConnectionType; 103: 104: my %managers; # Ip -> manager names 105: 106: my %perlvar; # Will have the apache conf defined perl vars. 107: 108: my %secureconf; # Will have requirements for security 109: # of lond connections 110: 111: my %crlchecked; # Will contain clients for which the client's SSL 112: # has been checked against the cluster's Certificate 113: # Revocation List. 114: 115: my $dist; 116: 117: # 118: # The hash below is used for command dispatching, and is therefore keyed on the request keyword. 119: # Each element of the hash contains a reference to an array that contains: 120: # A reference to a sub that executes the request corresponding to the keyword. 121: # A flag that is true if the request must be encoded to be acceptable. 122: # A mask with bits as follows: 123: # CLIENT_OK - Set when the function is allowed by ordinary clients 124: # MANAGER_OK - Set when the function is allowed to manager clients. 125: # 126: my $CLIENT_OK = 1; 127: my $MANAGER_OK = 2; 128: my %Dispatcher; 129: 130: 131: # 132: # The array below are password error strings." 133: # 134: my $lastpwderror = 13; # Largest error number from lcpasswd. 135: my @passwderrors = ("ok", 136: "pwchange_failure - lcpasswd must be run as user 'www'", 137: "pwchange_failure - lcpasswd got incorrect number of arguments", 138: "pwchange_failure - lcpasswd did not get the right nubmer of input text lines", 139: "pwchange_failure - lcpasswd too many simultaneous pwd changes in progress", 140: "pwchange_failure - lcpasswd User does not exist.", 141: "pwchange_failure - lcpasswd Incorrect current passwd", 142: "pwchange_failure - lcpasswd Unable to su to root.", 143: "pwchange_failure - lcpasswd Cannot set new passwd.", 144: "pwchange_failure - lcpasswd Username has invalid characters", 145: "pwchange_failure - lcpasswd Invalid characters in password", 146: "pwchange_failure - lcpasswd User already exists", 147: "pwchange_failure - lcpasswd Something went wrong with user addition.", 148: "pwchange_failure - lcpasswd Password mismatch", 149: "pwchange_failure - lcpasswd Error filename is invalid"); 150: 151: 152: # This array are the errors from lcinstallfile: 153: 154: my @installerrors = ("ok", 155: "Initial user id of client not that of www", 156: "Usage error, not enough command line arguments", 157: "Source filename does not exist", 158: "Destination filename does not exist", 159: "Some file operation failed", 160: "Invalid table filename." 161: ); 162: 163: # 164: # The %trust hash classifies commands according to type of trust 165: # required for execution of the command. 166: # 167: # When clients from a different institution request execution of a 168: # particular command, the trust settings for that institution set 169: # for this domain (or default domain for a multi-domain server) will 170: # be checked to see if running the command is allowed. 171: # 172: # Trust types which depend on the "Trust" domain configuration 173: # for the machine's default domain are: 174: # 175: # content ("Access to this domain's content by others") 176: # shared ("Access to other domain's content by this domain") 177: # enroll ("Enrollment in this domain's courses by others") 178: # coaurem ("Co-author roles for this domain's users elsewhere") 179: # domroles ("Domain roles in this domain assignable to others") 180: # catalog ("Course Catalog for this domain displayed elsewhere") 181: # reqcrs ("Requests for creation of courses in this domain by others") 182: # msg ("Users in other domains can send messages to this domain") 183: # 184: # Trust type which depends on the User Session Hosting (remote) 185: # domain configuration for machine's default domain is: "remote". 186: # 187: # Trust types which depend on contents of manager.tab in 188: # /home/httpd/lonTabs is: "manageronly". 189: # 190: # Trust type which requires client to share the same LON-CAPA 191: # "internet domain" (i.e., same institution as this server) is: 192: # "institutiononly". 193: # 194: 195: my %trust = ( 196: auth => {remote => 1}, 197: autocreatepassword => {remote => 1}, 198: autocrsreqchecks => {remote => 1, reqcrs => 1}, 199: autocrsrequpdate => {remote => 1}, 200: autocrsreqvalidation => {remote => 1}, 201: autogetsections => {remote => 1}, 202: autoinstcodedefaults => {remote => 1, catalog => 1}, 203: autoinstcodeformat => {remote => 1, catalog => 1}, 204: autonewcourse => {remote => 1, reqcrs => 1}, 205: autophotocheck => {remote => 1, enroll => 1}, 206: autophotochoice => {remote => 1}, 207: autophotopermission => {remote => 1, enroll => 1}, 208: autopossibleinstcodes => {remote => 1, reqcrs => 1}, 209: autoretrieve => {remote => 1, enroll => 1, catalog => 1}, 210: autorun => {remote => 1, enroll => 1, reqcrs => 1}, 211: autovalidateclass_sec => {catalog => 1}, 212: autovalidatecourse => {remote => 1, enroll => 1}, 213: autovalidateinstcode => {domroles => 1, remote => 1, enroll => 1}, 214: changeuserauth => {remote => 1, domroles => 1}, 215: chatretr => {remote => 1, enroll => 1}, 216: chatsend => {remote => 1, enroll => 1}, 217: courseiddump => {remote => 1, domroles => 1, enroll => 1}, 218: courseidput => {remote => 1, domroles => 1, enroll => 1}, 219: courseidputhash => {remote => 1, domroles => 1, enroll => 1}, 220: courselastaccess => {remote => 1, domroles => 1, enroll => 1}, 221: currentauth => {remote => 1, domroles => 1, enroll => 1}, 222: currentdump => {remote => 1, enroll => 1}, 223: currentversion => {remote=> 1, content => 1}, 224: dcmaildump => {remote => 1, domroles => 1}, 225: dcmailput => {remote => 1, domroles => 1}, 226: del => {remote => 1, domroles => 1, enroll => 1, content => 1}, 227: delbalcookie => {institutiononly => 1}, 228: deldom => {remote => 1, domroles => 1}, # not currently used 229: devalidatecache => {institutiononly => 1}, 230: domroleput => {remote => 1, enroll => 1}, 231: domrolesdump => {remote => 1, catalog => 1}, 232: du => {remote => 1, enroll => 1}, 233: du2 => {remote => 1, enroll => 1}, 234: dump => {remote => 1, enroll => 1, domroles => 1}, 235: edit => {institutiononly => 1}, #not used currently 236: eget => {remote => 1, domroles => 1, enroll => 1}, #not used currently 237: egetdom => {remote => 1, domroles => 1, enroll => 1, }, 238: ekey => {}, #not used currently 239: exit => {anywhere => 1}, 240: fetchuserfile => {remote => 1, enroll => 1}, 241: get => {remote => 1, domroles => 1, enroll => 1}, 242: getdom => {anywhere => 1}, 243: home => {anywhere => 1}, 244: iddel => {remote => 1, enroll => 1}, 245: idget => {remote => 1, enroll => 1}, 246: idput => {remote => 1, domroles => 1, enroll => 1}, 247: inc => {remote => 1, enroll => 1}, 248: init => {anywhere => 1}, 249: inst_usertypes => {remote => 1, domroles => 1, enroll => 1}, 250: instemailrules => {remote => 1, domroles => 1}, 251: instidrulecheck => {remote => 1, domroles => 1,}, 252: instidrules => {remote => 1, domroles => 1,}, 253: instrulecheck => {remote => 1, enroll => 1, reqcrs => 1, domroles => 1}, 254: instselfcreatecheck => {institutiononly => 1}, 255: instuserrules => {remote => 1, enroll => 1, reqcrs => 1, domroles => 1}, 256: keys => {remote => 1,}, 257: load => {anywhere => 1}, 258: log => {anywhere => 1}, 259: ls => {remote => 1, enroll => 1, content => 1,}, 260: ls2 => {remote => 1, enroll => 1, content => 1,}, 261: ls3 => {remote => 1, enroll => 1, content => 1,}, 262: makeuser => {remote => 1, enroll => 1, domroles => 1,}, 263: mkdiruserfile => {remote => 1, enroll => 1,}, 264: newput => {remote => 1, enroll => 1, reqcrs => 1, domroles => 1,}, 265: passwd => {remote => 1}, 266: ping => {anywhere => 1}, 267: pong => {anywhere => 1}, 268: pushfile => {manageronly => 1}, 269: put => {remote => 1, enroll => 1, domroles => 1, msg => 1, content => 1, shared => 1}, 270: putdom => {remote => 1, domroles => 1,}, 271: putstore => {remote => 1, enroll => 1}, 272: queryreply => {anywhere => 1}, 273: querysend => {anywhere => 1}, 274: querysend_activitylog => {remote => 1}, 275: querysend_allusers => {remote => 1, domroles => 1}, 276: querysend_courselog => {remote => 1}, 277: querysend_fetchenrollment => {remote => 1}, 278: querysend_getinstuser => {remote => 1}, 279: querysend_getmultinstusers => {remote => 1}, 280: querysend_instdirsearch => {remote => 1, domroles => 1, coaurem => 1}, 281: querysend_institutionalphotos => {remote => 1}, 282: querysend_portfolio_metadata => {remote => 1, content => 1}, 283: querysend_userlog => {remote => 1, domroles => 1}, 284: querysend_usersearch => {remote => 1, enroll => 1, coaurem => 1}, 285: quit => {anywhere => 1}, 286: readlonnetglobal => {institutiononly => 1}, 287: reinit => {manageronly => 1}, #not used currently 288: removeuserfile => {remote => 1, enroll => 1}, 289: renameuserfile => {remote => 1,}, 290: restore => {remote => 1, enroll => 1, reqcrs => 1,}, 291: rolesdel => {remote => 1, enroll => 1, domroles => 1, coaurem => 1}, 292: rolesput => {remote => 1, enroll => 1, domroles => 1, coaurem => 1}, 293: servercerts => {institutiononly => 1}, 294: serverdistarch => {anywhere => 1}, 295: serverhomeID => {anywhere => 1}, 296: serverloncaparev => {anywhere => 1}, 297: servertimezone => {remote => 1, enroll => 1}, 298: setannounce => {remote => 1, domroles => 1}, 299: sethost => {anywhere => 1}, 300: store => {remote => 1, enroll => 1, reqcrs => 1,}, 301: studentphoto => {remote => 1, enroll => 1}, 302: sub => {content => 1,}, 303: tmpdel => {anywhere => 1}, 304: tmpget => {anywhere => 1}, 305: tmpput => {anywhere => 1}, 306: tokenauthuserfile => {anywhere => 1}, 307: unsub => {content => 1,}, 308: update => {shared => 1}, 309: updateclickers => {remote => 1}, 310: userhassession => {anywhere => 1}, 311: userload => {anywhere => 1}, 312: version => {anywhere => 1}, #not used 313: ); 314: 315: # 316: # Statistics that are maintained and dislayed in the status line. 317: # 318: my $Transactions = 0; # Number of attempted transactions. 319: my $Failures = 0; # Number of transcations failed. 320: 321: # ResetStatistics: 322: # Resets the statistics counters: 323: # 324: sub ResetStatistics { 325: $Transactions = 0; 326: $Failures = 0; 327: } 328: 329: #------------------------------------------------------------------------ 330: # 331: # LocalConnection 332: # Completes the formation of a locally authenticated connection. 333: # This function will ensure that the 'remote' client is really the 334: # local host. If not, the connection is closed, and the function fails. 335: # If so, initcmd is parsed for the name of a file containing the 336: # IDEA session key. The fie is opened, read, deleted and the session 337: # key returned to the caller. 338: # 339: # Parameters: 340: # $Socket - Socket open on client. 341: # $initcmd - The full text of the init command. 342: # 343: # Returns: 344: # IDEA session key on success. 345: # undef on failure. 346: # 347: sub LocalConnection { 348: my ($Socket, $initcmd) = @_; 349: Debug("Attempting local connection: $initcmd client: $clientip"); 350: if($clientip ne "127.0.0.1") { 351: &logthis(' LocalConnection rejecting non local: ' 352: ."$clientip ne 127.0.0.1 "); 353: close $Socket; 354: return undef; 355: } else { 356: chomp($initcmd); # Get rid of \n in filename. 357: my ($init, $type, $name) = split(/:/, $initcmd); 358: Debug(" Init command: $init $type $name "); 359: 360: # Require that $init = init, and $type = local: Otherwise 361: # the caller is insane: 362: 363: if(($init ne "init") && ($type ne "local")) { 364: &logthis(' LocalConnection: caller is insane! ' 365: ."init = $init, and type = $type "); 366: close($Socket);; 367: return undef; 368: 369: } 370: # Now get the key filename: 371: 372: my $IDEAKey = lonlocal::ReadKeyFile($name); 373: return $IDEAKey; 374: } 375: } 376: #------------------------------------------------------------------------------ 377: # 378: # SSLConnection 379: # Completes the formation of an ssh authenticated connection. The 380: # socket is promoted to an ssl socket. If this promotion and the associated 381: # certificate exchange are successful, the IDEA key is generated and sent 382: # to the remote peer via the SSL tunnel. The IDEA key is also returned to 383: # the caller after the SSL tunnel is torn down. 384: # 385: # Parameters: 386: # Name Type Purpose 387: # $Socket IO::Socket::INET Plaintext socket. 388: # 389: # Returns: 390: # IDEA key on success. 391: # undef on failure. 392: # 393: sub SSLConnection { 394: my $Socket = shift; 395: 396: Debug("SSLConnection: "); 397: my $KeyFile = lonssl::KeyFile(); 398: if(!$KeyFile) { 399: my $err = lonssl::LastError(); 400: &logthis(" CRITICAL" 401: ."Can't get key file $err "); 402: return undef; 403: } 404: my ($CACertificate, 405: $Certificate) = lonssl::CertificateFile(); 406: 407: 408: # If any of the key, certificate or certificate authority 409: # certificate filenames are not defined, this can't work. 410: 411: if((!$Certificate) || (!$CACertificate)) { 412: my $err = lonssl::LastError(); 413: &logthis(" CRITICAL" 414: ."Can't get certificates: $err "); 415: 416: return undef; 417: } 418: Debug("Key: $KeyFile CA: $CACertificate Cert: $Certificate"); 419: 420: # Indicate to our peer that we can procede with 421: # a transition to ssl authentication: 422: 423: print $Socket "ok:ssl\n"; 424: 425: Debug("Approving promotion -> ssl"); 426: # And do so: 427: 428: my $CRLFile; 429: unless ($crlchecked{$clientname}) { 430: $CRLFile = lonssl::CRLFile(); 431: $crlchecked{$clientname} = 1; 432: } 433: 434: my $SSLSocket = lonssl::PromoteServerSocket($Socket, 435: $CACertificate, 436: $Certificate, 437: $KeyFile, 438: $clientname, 439: $CRLFile, 440: $clientversion); 441: if(! ($SSLSocket) ) { # SSL socket promotion failed. 442: my $err = lonssl::LastError(); 443: &logthis(" CRITICAL " 444: ."SSL Socket promotion failed: $err "); 445: return undef; 446: } 447: Debug("SSL Promotion successful"); 448: 449: # 450: # The only thing we'll use the socket for is to send the IDEA key 451: # to the peer: 452: 453: my $Key = lonlocal::CreateCipherKey(); 454: print $SSLSocket "$Key\n"; 455: 456: lonssl::Close($SSLSocket); 457: 458: Debug("Key exchange complete: $Key"); 459: 460: return $Key; 461: } 462: # 463: # InsecureConnection: 464: # If insecure connections are allowd, 465: # exchange a challenge with the client to 'validate' the 466: # client (not really, but that's the protocol): 467: # We produce a challenge string that's sent to the client. 468: # The client must then echo the challenge verbatim to us. 469: # 470: # Parameter: 471: # Socket - Socket open on the client. 472: # Returns: 473: # 1 - success. 474: # 0 - failure (e.g.mismatch or insecure not allowed). 475: # 476: sub InsecureConnection { 477: my $Socket = shift; 478: 479: # Don't even start if insecure connections are not allowed. 480: # return 0 if Insecure connections not allowed. 481: # 482: if (ref($secureconf{'connfrom'}) eq 'HASH') { 483: if ($clientsamedom) { 484: if ($secureconf{'connfrom'}{'dom'} eq 'req') { 485: return 0; 486: } 487: } elsif ($clientsameinst) { 488: if ($secureconf{'connfrom'}{'intdom'} eq 'req') { 489: return 0; 490: } 491: } else { 492: if ($secureconf{'connfrom'}{'other'} eq 'req') { 493: return 0; 494: } 495: } 496: } elsif (!$perlvar{londAllowInsecure}) { 497: return 0; 498: } 499: 500: # Fabricate a challenge string and send it.. 501: 502: my $challenge = "$$".time; # pid + time. 503: print $Socket "$challenge\n"; 504: &status("Waiting for challenge reply"); 505: 506: my $answer = <$Socket>; 507: $answer =~s/\W//g; 508: if($challenge eq $answer) { 509: return 1; 510: } else { 511: logthis("WARNING client did not respond to challenge"); 512: &status("No challenge reqply"); 513: return 0; 514: } 515: 516: 517: } 518: # 519: # Safely execute a command (as long as it's not a shel command and doesn 520: # not require/rely on shell escapes. The function operates by doing a 521: # a pipe based fork and capturing stdout and stderr from the pipe. 522: # 523: # Formal Parameters: 524: # $line - A line of text to be executed as a command. 525: # Returns: 526: # The output from that command. If the output is multiline the caller 527: # must know how to split up the output. 528: # 529: # 530: sub execute_command { 531: my ($line) = @_; 532: my @words = split(/\s/, $line); # Bust the command up into words. 533: my $output = ""; 534: 535: my $pid = open(CHILD, "-|"); 536: 537: if($pid) { # Parent process 538: Debug("In parent process for execute_command"); 539: my @data = <CHILD>; # Read the child's outupt... 540: close CHILD; 541: foreach my $output_line (@data) { 542: Debug("Adding $output_line"); 543: $output .= $output_line; # Presumably has a \n on it. 544: } 545: 546: } else { # Child process 547: close (STDERR); 548: open (STDERR, ">&STDOUT");# Combine stderr, and stdout... 549: exec(@words); # won't return. 550: } 551: return $output; 552: } 553: 554: 555: # GetCertificate: Given a transaction that requires a certificate, 556: # this function will extract the certificate from the transaction 557: # request. Note that at this point, the only concept of a certificate 558: # is the hostname to which we are connected. 559: # 560: # Parameter: 561: # request - The request sent by our client (this parameterization may 562: # need to change when we really use a certificate granting 563: # authority. 564: # 565: sub GetCertificate { 566: my $request = shift; 567: 568: return $clientip; 569: } 570: 571: # 572: # Return true if client is a manager. 573: # 574: sub isManager { 575: return (($ConnectionType eq "manager") || ($ConnectionType eq "both")); 576: } 577: # 578: # Return tru if client can do client functions 579: # 580: sub isClient { 581: return (($ConnectionType eq "client") || ($ConnectionType eq "both")); 582: } 583: 584: 585: # 586: # ReadManagerTable: Reads in the current manager table. For now this is 587: # done on each manager authentication because: 588: # - These authentications are not frequent 589: # - This allows dynamic changes to the manager table 590: # without the need to signal to the lond. 591: # 592: sub ReadManagerTable { 593: 594: &Debug("Reading manager table"); 595: # Clean out the old table first.. 596: 597: foreach my $key (keys %managers) { 598: delete $managers{$key}; 599: } 600: 601: my $tablename = $perlvar{'lonTabDir'}."/managers.tab"; 602: if (!open (MANAGERS, $tablename)) { 603: my $hostname = &Apache::lonnet::hostname($perlvar{'lonHostID'}); 604: if (&Apache::lonnet::is_LC_dns($hostname)) { 605: &logthis('No manager table. Nobody can manage!!'); 606: } 607: return; 608: } 609: while(my $host = <MANAGERS>) { 610: chomp($host); 611: if ($host =~ "^#") { # Comment line. 612: next; 613: } 614: if (!defined &Apache::lonnet::get_host_ip($host)) { # This is a non cluster member 615: # The entry is of the form: 616: # cluname:hostname 617: # cluname - A 'cluster hostname' is needed in order to negotiate 618: # the host key. 619: # hostname- The dns name of the host. 620: # 621: my($cluname, $dnsname) = split(/:/, $host); 622: 623: my $ip = gethostbyname($dnsname); 624: if(defined($ip)) { # bad names don't deserve entry. 625: my $hostip = inet_ntoa($ip); 626: $managers{$hostip} = $cluname; 627: logthis(' registering manager '. 628: "$dnsname as $cluname with $hostip \n"); 629: } 630: } else { 631: logthis(' existing host'." $host\n"); 632: $managers{&Apache::lonnet::get_host_ip($host)} = $host; # Use info from cluster tab if cluster memeber 633: } 634: } 635: } 636: 637: # 638: # ValidManager: Determines if a given certificate represents a valid manager. 639: # in this primitive implementation, the 'certificate' is 640: # just the connecting loncapa client name. This is checked 641: # against a valid client list in the configuration. 642: # 643: # 644: sub ValidManager { 645: my $certificate = shift; 646: 647: return isManager; 648: } 649: # 650: # CopyFile: Called as part of the process of installing a 651: # new configuration file. This function copies an existing 652: # file to a backup file. 653: # Parameters: 654: # oldfile - Name of the file to backup. 655: # newfile - Name of the backup file. 656: # Return: 657: # 0 - Failure (errno has failure reason). 658: # 1 - Success. 659: # 660: sub CopyFile { 661: 662: my ($oldfile, $newfile) = @_; 663: 664: if (! copy($oldfile,$newfile)) { 665: return 0; 666: } 667: chmod(0660, $newfile); 668: return 1; 669: } 670: # 671: # Host files are passed out with externally visible host IPs. 672: # If, for example, we are behind a fire-wall or NAT host, our 673: # internally visible IP may be different than the externally 674: # visible IP. Therefore, we always adjust the contents of the 675: # host file so that the entry for ME is the IP that we believe 676: # we have. At present, this is defined as the entry that 677: # DNS has for us. If by some chance we are not able to get a 678: # DNS translation for us, then we assume that the host.tab file 679: # is correct. 680: # BUGBUGBUG - in the future, we really should see if we can 681: # easily query the interface(s) instead. 682: # Parameter(s): 683: # contents - The contents of the host.tab to check. 684: # Returns: 685: # newcontents - The adjusted contents. 686: # 687: # 688: sub AdjustHostContents { 689: my $contents = shift; 690: my $adjusted; 691: my $me = $perlvar{'lonHostID'}; 692: 693: foreach my $line (split(/\n/,$contents)) { 694: if(!(($line eq "") || ($line =~ /^ *\#/) || ($line =~ /^ *$/) || 695: ($line =~ /^\s*\^/))) { 696: chomp($line); 697: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon)=split(/:/,$line); 698: if ($id eq $me) { 699: my $ip = gethostbyname($name); 700: my $ipnew = inet_ntoa($ip); 701: $ip = $ipnew; 702: # Reconstruct the host line and append to adjusted: 703: 704: my $newline = "$id:$domain:$role:$name:$ip"; 705: if($maxcon ne "") { # Not all hosts have loncnew tuning params 706: $newline .= ":$maxcon:$idleto:$mincon"; 707: } 708: $adjusted .= $newline."\n"; 709: 710: } else { # Not me, pass unmodified. 711: $adjusted .= $line."\n"; 712: } 713: } else { # Blank or comment never re-written. 714: $adjusted .= $line."\n"; # Pass blanks and comments as is. 715: } 716: } 717: return $adjusted; 718: } 719: # 720: # InstallFile: Called to install an administrative file: 721: # - The file is created int a temp directory called <name>.tmp 722: # - lcinstall file is called to install the file. 723: # since the web app has no direct write access to the table directory 724: # 725: # Parameters: 726: # Name of the file 727: # File Contents. 728: # Return: 729: # nonzero - success. 730: # 0 - failure and $! has an errno. 731: # Assumptions: 732: # File installtion is a relatively infrequent 733: # 734: sub InstallFile { 735: 736: my ($Filename, $Contents) = @_; 737: # my $TempFile = $Filename.".tmp"; 738: my $exedir = $perlvar{'lonDaemons'}; 739: my $tmpdir = $exedir.'/tmp/'; 740: my $TempFile = $tmpdir."TempTableFile.tmp"; 741: 742: # Open the file for write: 743: 744: my $fh = IO::File->new("> $TempFile"); # Write to temp. 745: if(!(defined $fh)) { 746: &logthis(' Unable to create '.$TempFile.""); 747: return 0; 748: } 749: # write the contents of the file: 750: 751: print $fh ($Contents); 752: $fh->close; # In case we ever have a filesystem w. locking 753: 754: chmod(0664, $TempFile); # Everyone can write it. 755: 756: # Use lcinstall file to put the file in the table directory... 757: 758: &Debug("Opening pipe to $exedir/lcinstallfile $TempFile $Filename"); 759: my $pf = IO::File->new("| $exedir/lcinstallfile $TempFile $Filename > $exedir/logs/lcinstallfile.log"); 760: close $pf; 761: my $err = $?; 762: &Debug("Status is $err"); 763: if ($err != 0) { 764: my $msg = $err; 765: if ($err < @installerrors) { 766: $msg = $installerrors[$err]; 767: } 768: &logthis("Install failed for table file $Filename : $msg"); 769: return 0; 770: } 771: 772: # Remove the temp file: 773: 774: unlink($TempFile); 775: 776: return 1; 777: } 778: 779: 780: # 781: # ConfigFileFromSelector: converts a configuration file selector 782: # into a configuration file pathname. 783: # Supports the following file selectors: 784: # hosts, domain, dns_hosts, dns_domain 785: # 786: # 787: # Parameters: 788: # selector - Configuration file selector. 789: # Returns: 790: # Full path to the file or undef if the selector is invalid. 791: # 792: sub ConfigFileFromSelector { 793: my $selector = shift; 794: my $tablefile; 795: 796: if ($selector eq 'loncapaCAcrl') { 797: my $tabledir = $perlvar{'lonCertificateDirectory'}; 798: if (-d $tabledir) { 799: $tablefile = $tabledir.'/'.$selector.'.pem'; 800: } 801: } else { 802: my $tabledir = $perlvar{'lonTabDir'}.'/'; 803: if (($selector eq "hosts") || ($selector eq "domain") || 804: ($selector eq "dns_hosts") || ($selector eq "dns_domain")) { 805: $tablefile = $tabledir.$selector.'.tab'; 806: } 807: } 808: return $tablefile; 809: } 810: # 811: # PushFile: Called to do an administrative push of a file. 812: # - Ensure the file being pushed is one we support. 813: # - Backup the old file to <filename.saved> 814: # - Separate the contents of the new file out from the 815: # rest of the request. 816: # - Write the new file. 817: # Parameter: 818: # Request - The entire user request. This consists of a : separated 819: # string pushfile:tablename:contents. 820: # NOTE: The contents may have :'s in it as well making things a bit 821: # more interesting... but not much. 822: # Returns: 823: # String to send to client ("ok" or "refused" if bad file). 824: # 825: sub PushFile { 826: my $request = shift; 827: my ($command, $filename, $contents) = split(":", $request, 3); 828: &Debug("PushFile"); 829: 830: # At this point in time, pushes for only the following tables and 831: # CRL file are supported: 832: # hosts.tab ($filename eq host). 833: # domain.tab ($filename eq domain). 834: # dns_hosts.tab ($filename eq dns_host). 835: # dns_domain.tab ($filename eq dns_domain). 836: # loncapaCAcrl.pem ($filename eq loncapaCAcrl); 837: # Construct the destination filename or reject the request. 838: # 839: # lonManage is supposed to ensure this, however this session could be 840: # part of some elaborate spoof that managed somehow to authenticate. 841: # 842: 843: 844: my $tablefile = ConfigFileFromSelector($filename); 845: if(! (defined $tablefile)) { 846: return "refused"; 847: } 848: 849: # If the file being pushed is the host file, we adjust the entry for ourself so that the 850: # IP will be our current IP as looked up in dns. Note this is only 99% good as it's possible 851: # to conceive of conditions where we don't have a DNS entry locally. This is possible in a 852: # network sense but it doesn't make much sense in a LonCAPA sense so we ignore (for now) 853: # that possibilty. 854: 855: if($filename eq "host") { 856: $contents = AdjustHostContents($contents); 857: } elsif (($filename eq 'dns_host') || ($filename eq 'dns_domain') || 858: ($filename eq 'loncapaCAcrl')) { 859: if ($contents eq '') { 860: &logthis(' Pushfile: unable to install ' 861: .$tablefile." - no data received from push. "); 862: return 'error: push had no data'; 863: } 864: if (&Apache::lonnet::get_host_ip($clientname)) { 865: my $clienthost = &Apache::lonnet::hostname($clientname); 866: if ($managers{$clientip} eq $clientname) { 867: my $clientprotocol = $Apache::lonnet::protocol{$clientname}; 868: $clientprotocol = 'http' if ($clientprotocol ne 'https'); 869: my $url; 870: if ($filename eq 'loncapaCAcrl') { 871: $url = '/adm/dns/loncapaCRL'; 872: } else { 873: $url = '/adm/'.$filename; 874: $url =~ s{_}{/}; 875: } 876: my $request=new HTTP::Request('GET',"$clientprotocol://$clienthost$url"); 877: my $response = LONCAPA::LWPReq::makerequest($clientname,$request,'',\%perlvar,60,0); 878: if ($response->is_error()) { 879: &logthis(' Pushfile: unable to install ' 880: .$tablefile." - error attempting to pull data. "); 881: return 'error: pull failed'; 882: } else { 883: my $result = $response->content; 884: chomp($result); 885: unless ($result eq $contents) { 886: &logthis(' Pushfile: unable to install ' 887: .$tablefile." - pushed data and pulled data differ. "); 888: my $pushleng = length($contents); 889: my $pullleng = length($result); 890: if ($pushleng != $pullleng) { 891: return "error: $pushleng vs $pullleng bytes"; 892: } else { 893: return "error: mismatch push and pull"; 894: } 895: } 896: } 897: } 898: } 899: } 900: 901: # Install the new file: 902: 903: &logthis("Installing new $tablefile contents:\n$contents"); 904: if(!InstallFile($tablefile, $contents)) { 905: &logthis(' Pushfile: unable to install ' 906: .$tablefile." $! "); 907: return "error:$!"; 908: } else { 909: &logthis(' Installed new '.$tablefile 910: ." - transaction by: $clientname ($clientip)"); 911: my $adminmail = $perlvar{'lonAdmEMail'}; 912: my $admindom = &Apache::lonnet::host_domain($perlvar{'lonHostID'}); 913: if ($admindom ne '') { 914: my %domconfig = 915: &Apache::lonnet::get_dom('configuration',['contacts'],$admindom); 916: if (ref($domconfig{'contacts'}) eq 'HASH') { 917: if ($domconfig{'contacts'}{'adminemail'} ne '') { 918: $adminmail = $domconfig{'contacts'}{'adminemail'}; 919: } 920: } 921: } 922: if ($adminmail =~ /^[^\@]+\@[^\@]+$/) { 923: my $msg = new Mail::Send; 924: $msg->to($adminmail); 925: $msg->subject('LON-CAPA DNS update on '.$perlvar{'lonHostID'}); 926: $msg->add('Content-type','text/plain; charset=UTF-8'); 927: if (my $fh = $msg->open()) { 928: print $fh 'Update to '.$tablefile.' from Cluster Manager '. 929: "$clientname ($clientip)\n"; 930: $fh->close; 931: } 932: } 933: } 934: 935: # Indicate success: 936: 937: return "ok"; 938: 939: } 940: 941: # 942: # Called to re-init either lonc or lond. 943: # 944: # Parameters: 945: # request - The full request by the client. This is of the form 946: # reinit:<process> 947: # where <process> is allowed to be either of 948: # lonc or lond 949: # 950: # Returns: 951: # The string to be sent back to the client either: 952: # ok - Everything worked just fine. 953: # error:why - There was a failure and why describes the reason. 954: # 955: # 956: sub ReinitProcess { 957: my $request = shift; 958: 959: 960: # separate the request (reinit) from the process identifier and 961: # validate it producing the name of the .pid file for the process. 962: # 963: # 964: my ($junk, $process) = split(":", $request); 965: my $processpidfile = $perlvar{'lonDaemons'}.'/logs/'; 966: if($process eq 'lonc') { 967: $processpidfile = $processpidfile."lonc.pid"; 968: if (!open(PIDFILE, "< $processpidfile")) { 969: return "error:Open failed for $processpidfile"; 970: } 971: my $loncpid = <PIDFILE>; 972: close(PIDFILE); 973: logthis(' Reinitializing lonc pid='.$loncpid 974: .""); 975: kill("USR2", $loncpid); 976: } elsif ($process eq 'lond') { 977: logthis(' Reinitializing self (lond) '); 978: &UpdateHosts; # Lond is us!! 979: } else { 980: &logthis('"); 982: return "error:Invalid process identifier $process"; 983: } 984: return 'ok'; 985: } 986: # Validate a line in a configuration file edit script: 987: # Validation includes: 988: # - Ensuring the command is valid. 989: # - Ensuring the command has sufficient parameters 990: # Parameters: 991: # scriptline - A line to validate (\n has been stripped for what it's worth). 992: # 993: # Return: 994: # 0 - Invalid scriptline. 995: # 1 - Valid scriptline 996: # NOTE: 997: # Only the command syntax is checked, not the executability of the 998: # command. 999: # 1000: sub isValidEditCommand { 1001: my $scriptline = shift; 1002: 1003: # Line elements are pipe separated: 1004: 1005: my ($command, $key, $newline) = split(/\|/, $scriptline); 1006: &logthis(' isValideditCommand checking: '. 1007: "Command = '$command', Key = '$key', Newline = '$newline' \n"); 1008: 1009: if ($command eq "delete") { 1010: # 1011: # key with no newline. 1012: # 1013: if( ($key eq "") || ($newline ne "")) { 1014: return 0; # Must have key but no newline. 1015: } else { 1016: return 1; # Valid syntax. 1017: } 1018: } elsif ($command eq "replace") { 1019: # 1020: # key and newline: 1021: # 1022: if (($key eq "") || ($newline eq "")) { 1023: return 0; 1024: } else { 1025: return 1; 1026: } 1027: } elsif ($command eq "append") { 1028: if (($key ne "") && ($newline eq "")) { 1029: return 1; 1030: } else { 1031: return 0; 1032: } 1033: } else { 1034: return 0; # Invalid command. 1035: } 1036: return 0; # Should not get here!!! 1037: } 1038: # 1039: # ApplyEdit - Applies an edit command to a line in a configuration 1040: # file. It is the caller's responsiblity to validate the 1041: # edit line. 1042: # Parameters: 1043: # $directive - A single edit directive to apply. 1044: # Edit directives are of the form: 1045: # append|newline - Appends a new line to the file. 1046: # replace|key|newline - Replaces the line with key value 'key' 1047: # delete|key - Deletes the line with key value 'key'. 1048: # $editor - A config file editor object that contains the 1049: # file being edited. 1050: # 1051: sub ApplyEdit { 1052: 1053: my ($directive, $editor) = @_; 1054: 1055: # Break the directive down into its command and its parameters 1056: # (at most two at this point. The meaning of the parameters, if in fact 1057: # they exist depends on the command). 1058: 1059: my ($command, $p1, $p2) = split(/\|/, $directive); 1060: 1061: if($command eq "append") { 1062: $editor->Append($p1); # p1 - key p2 null. 1063: } elsif ($command eq "replace") { 1064: $editor->ReplaceLine($p1, $p2); # p1 - key p2 = newline. 1065: } elsif ($command eq "delete") { 1066: $editor->DeleteLine($p1); # p1 - key p2 null. 1067: } else { # Should not get here!!! 1068: die "Invalid command given to ApplyEdit $command" 1069: } 1070: } 1071: # 1072: # AdjustOurHost: 1073: # Adjusts a host file stored in a configuration file editor object 1074: # for the true IP address of this host. This is necessary for hosts 1075: # that live behind a firewall. 1076: # Those hosts have a publicly distributed IP of the firewall, but 1077: # internally must use their actual IP. We assume that a given 1078: # host only has a single IP interface for now. 1079: # Formal Parameters: 1080: # editor - The configuration file editor to adjust. This 1081: # editor is assumed to contain a hosts.tab file. 1082: # Strategy: 1083: # - Figure out our hostname. 1084: # - Lookup the entry for this host. 1085: # - Modify the line to contain our IP 1086: # - Do a replace for this host. 1087: sub AdjustOurHost { 1088: my $editor = shift; 1089: 1090: # figure out who I am. 1091: 1092: my $myHostName = $perlvar{'lonHostID'}; # LonCAPA hostname. 1093: 1094: # Get my host file entry. 1095: 1096: my $ConfigLine = $editor->Find($myHostName); 1097: if(! (defined $ConfigLine)) { 1098: die "AdjustOurHost - no entry for me in hosts file $myHostName"; 1099: } 1100: # figure out my IP: 1101: # Use the config line to get my hostname. 1102: # Use gethostbyname to translate that into an IP address. 1103: # 1104: my ($id,$domain,$role,$name,$maxcon,$idleto,$mincon) = split(/:/,$ConfigLine); 1105: # 1106: # Reassemble the config line from the elements in the list. 1107: # Note that if the loncnew items were not present before, they will 1108: # be now even if they would be empty 1109: # 1110: my $newConfigLine = $id; 1111: foreach my $item ($domain, $role, $name, $maxcon, $idleto, $mincon) { 1112: $newConfigLine .= ":".$item; 1113: } 1114: # Replace the line: 1115: 1116: $editor->ReplaceLine($id, $newConfigLine); 1117: 1118: } 1119: # 1120: # ReplaceConfigFile: 1121: # Replaces a configuration file with the contents of a 1122: # configuration file editor object. 1123: # This is done by: 1124: # - Copying the target file to <filename>.old 1125: # - Writing the new file to <filename>.tmp 1126: # - Moving <filename.tmp> -> <filename> 1127: # This laborious process ensures that the system is never without 1128: # a configuration file that's at least valid (even if the contents 1129: # may be dated). 1130: # Parameters: 1131: # filename - Name of the file to modify... this is a full path. 1132: # editor - Editor containing the file. 1133: # 1134: sub ReplaceConfigFile { 1135: 1136: my ($filename, $editor) = @_; 1137: 1138: CopyFile ($filename, $filename.".old"); 1139: 1140: my $contents = $editor->Get(); # Get the contents of the file. 1141: 1142: InstallFile($filename, $contents); 1143: } 1144: # 1145: # 1146: # Called to edit a configuration table file 1147: # Parameters: 1148: # request - The entire command/request sent by lonc or lonManage 1149: # Return: 1150: # The reply to send to the client. 1151: # 1152: sub EditFile { 1153: my $request = shift; 1154: 1155: # Split the command into it's pieces: edit:filetype:script 1156: 1157: my ($cmd, $filetype, $script) = split(/:/, $request,3); # : in script 1158: 1159: # Check the pre-coditions for success: 1160: 1161: if($cmd != "edit") { # Something is amiss afoot alack. 1162: return "error:edit request detected, but request != 'edit'\n"; 1163: } 1164: if( ($filetype ne "hosts") && 1165: ($filetype ne "domain")) { 1166: return "error:edit requested with invalid file specifier: $filetype \n"; 1167: } 1168: 1169: # Split the edit script and check it's validity. 1170: 1171: my @scriptlines = split(/\n/, $script); # one line per element. 1172: my $linecount = scalar(@scriptlines); 1173: for(my $i = 0; $i < $linecount; $i++) { 1174: chomp($scriptlines[$i]); 1175: if(!isValidEditCommand($scriptlines[$i])) { 1176: return "error:edit with bad script line: '$scriptlines[$i]' \n"; 1177: } 1178: } 1179: 1180: # Execute the edit operation. 1181: # - Create a config file editor for the appropriate file and 1182: # - execute each command in the script: 1183: # 1184: my $configfile = ConfigFileFromSelector($filetype); 1185: if (!(defined $configfile)) { 1186: return "refused\n"; 1187: } 1188: my $editor = ConfigFileEdit->new($configfile); 1189: 1190: for (my $i = 0; $i < $linecount; $i++) { 1191: ApplyEdit($scriptlines[$i], $editor); 1192: } 1193: # If the file is the host file, ensure that our host is 1194: # adjusted to have our ip: 1195: # 1196: if($filetype eq "host") { 1197: AdjustOurHost($editor); 1198: } 1199: # Finally replace the current file with our file. 1200: # 1201: ReplaceConfigFile($configfile, $editor); 1202: 1203: return "ok\n"; 1204: } 1205: 1206: # read_profile 1207: # 1208: # Returns a set of specific entries from a user's profile file. 1209: # this is a utility function that is used by both get_profile_entry and 1210: # get_profile_entry_encrypted. 1211: # 1212: # Parameters: 1213: # udom - Domain in which the user exists. 1214: # uname - User's account name (loncapa account) 1215: # namespace - The profile namespace to open. 1216: # what - A set of & separated queries. 1217: # Returns: 1218: # If all ok: - The string that needs to be shipped back to the user. 1219: # If failure - A string that starts with error: followed by the failure 1220: # reason.. note that this probabyl gets shipped back to the 1221: # user as well. 1222: # 1223: sub read_profile { 1224: my ($udom, $uname, $namespace, $what) = @_; 1225: 1226: my $hashref = &tie_user_hash($udom, $uname, $namespace, 1227: &GDBM_READER()); 1228: if ($hashref) { 1229: my @queries=split(/\&/,$what); 1230: if ($namespace eq 'roles') { 1231: @queries = map { &unescape($_); } @queries; 1232: } 1233: my $qresult=''; 1234: 1235: for (my $i=0;$i<=$#queries;$i++) { 1236: $qresult.="$hashref->{$queries[$i]}&"; # Presumably failure gives empty string. 1237: } 1238: $qresult=~s/\&$//; # Remove trailing & from last lookup. 1239: if (&untie_user_hash($hashref)) { 1240: return $qresult; 1241: } else { 1242: return "error: ".($!+0)." untie (GDBM) Failed"; 1243: } 1244: } else { 1245: if ($!+0 == 2) { 1246: return "error:No such file or GDBM reported bad block error"; 1247: } else { 1248: return "error: ".($!+0)." tie (GDBM) Failed"; 1249: } 1250: } 1251: 1252: } 1253: #--------------------- Request Handlers -------------------------------------------- 1254: # 1255: # By convention each request handler registers itself prior to the sub 1256: # declaration: 1257: # 1258: 1259: #++ 1260: # 1261: # Handles ping requests. 1262: # Parameters: 1263: # $cmd - the actual keyword that invoked us. 1264: # $tail - the tail of the request that invoked us. 1265: # $replyfd- File descriptor connected to the client 1266: # Implicit Inputs: 1267: # $currenthostid - Global variable that carries the name of the host we are 1268: # known as. 1269: # Returns: 1270: # 1 - Ok to continue processing. 1271: # 0 - Program should exit. 1272: # Side effects: 1273: # Reply information is sent to the client. 1274: sub ping_handler { 1275: my ($cmd, $tail, $client) = @_; 1276: Debug("$cmd $tail $client .. $currenthostid:"); 1277: 1278: Reply( $client,\$currenthostid,"$cmd:$tail"); 1279: 1280: return 1; 1281: } 1282: &register_handler("ping", \&ping_handler, 0, 1, 1); # Ping unencoded, client or manager. 1283: 1284: #++ 1285: # 1286: # Handles pong requests. Pong replies with our current host id, and 1287: # the results of a ping sent to us via our lonc. 1288: # 1289: # Parameters: 1290: # $cmd - the actual keyword that invoked us. 1291: # $tail - the tail of the request that invoked us. 1292: # $replyfd- File descriptor connected to the client 1293: # Implicit Inputs: 1294: # $currenthostid - Global variable that carries the name of the host we are 1295: # connected to. 1296: # Returns: 1297: # 1 - Ok to continue processing. 1298: # 0 - Program should exit. 1299: # Side effects: 1300: # Reply information is sent to the client. 1301: sub pong_handler { 1302: my ($cmd, $tail, $replyfd) = @_; 1303: 1304: my $reply=&Apache::lonnet::reply("ping",$clientname); 1305: &Reply( $replyfd, "$currenthostid:$reply\n", "$cmd:$tail"); 1306: return 1; 1307: } 1308: &register_handler("pong", \&pong_handler, 0, 1, 1); # Pong unencoded, client or manager 1309: 1310: #++ 1311: # Called to establish an encrypted session key with the remote client. 1312: # Note that with secure lond, in most cases this function is never 1313: # invoked. Instead, the secure session key is established either 1314: # via a local file that's locked down tight and only lives for a short 1315: # time, or via an ssl tunnel...and is generated from a bunch-o-random 1316: # bits from /dev/urandom, rather than the predictable pattern used by 1317: # by this sub. This sub is only used in the old-style insecure 1318: # key negotiation. 1319: # Parameters: 1320: # $cmd - the actual keyword that invoked us. 1321: # $tail - the tail of the request that invoked us. 1322: # $replyfd- File descriptor connected to the client 1323: # Implicit Inputs: 1324: # $currenthostid - Global variable that carries the name of the host 1325: # known as. 1326: # $clientname - Global variable that carries the name of the host we're connected to. 1327: # Returns: 1328: # 1 - Ok to continue processing. 1329: # 0 - Program should exit. 1330: # Implicit Outputs: 1331: # Reply information is sent to the client. 1332: # $cipher is set with a reference to a new IDEA encryption object. 1333: # 1334: sub establish_key_handler { 1335: my ($cmd, $tail, $replyfd) = @_; 1336: 1337: my $buildkey=time.$$.int(rand 100000); 1338: $buildkey=~tr/1-6/A-F/; 1339: $buildkey=int(rand 100000).$buildkey.int(rand 100000); 1340: my $key=$currenthostid.$clientname; 1341: $key=~tr/a-z/A-Z/; 1342: $key=~tr/G-P/0-9/; 1343: $key=~tr/Q-Z/0-9/; 1344: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey; 1345: $key=substr($key,0,32); 1346: my $cipherkey=pack("H32",$key); 1347: $cipher=new IDEA $cipherkey; 1348: &Reply($replyfd, \$buildkey, "$cmd:$tail"); 1349: 1350: return 1; 1351: 1352: } 1353: &register_handler("ekey", \&establish_key_handler, 0, 1,1); 1354: 1355: # Handler for the load command. Returns the current system load average 1356: # to the requestor. 1357: # 1358: # Parameters: 1359: # $cmd - the actual keyword that invoked us. 1360: # $tail - the tail of the request that invoked us. 1361: # $replyfd- File descriptor connected to the client 1362: # Implicit Inputs: 1363: # $currenthostid - Global variable that carries the name of the host 1364: # known as. 1365: # $clientname - Global variable that carries the name of the host we're connected to. 1366: # Returns: 1367: # 1 - Ok to continue processing. 1368: # 0 - Program should exit. 1369: # Side effects: 1370: # Reply information is sent to the client. 1371: sub load_handler { 1372: my ($cmd, $tail, $replyfd) = @_; 1373: 1374: 1375: 1376: # Get the load average from /proc/loadavg and calculate it as a percentage of 1377: # the allowed load limit as set by the perl global variable lonLoadLim 1378: 1379: my $loadavg; 1380: my $loadfile=IO::File->new('/proc/loadavg'); 1381: 1382: $loadavg=<$loadfile>; 1383: $loadavg =~ s/\s.*//g; # Extract the first field only. 1384: 1385: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'}; 1386: 1387: &Reply( $replyfd, \$loadpercent, "$cmd:$tail"); 1388: 1389: return 1; 1390: } 1391: &register_handler("load", \&load_handler, 0, 1, 0); 1392: 1393: # 1394: # Process the userload request. This sub returns to the client the current 1395: # user load average. It can be invoked either by clients or managers. 1396: # 1397: # Parameters: 1398: # $cmd - the actual keyword that invoked us. 1399: # $tail - the tail of the request that invoked us. 1400: # $replyfd- File descriptor connected to the client 1401: # Implicit Inputs: 1402: # $currenthostid - Global variable that carries the name of the host 1403: # known as. 1404: # $clientname - Global variable that carries the name of the host we're connected to. 1405: # Returns: 1406: # 1 - Ok to continue processing. 1407: # 0 - Program should exit 1408: # Implicit inputs: 1409: # whatever the userload() function requires. 1410: # Implicit outputs: 1411: # the reply is written to the client. 1412: # 1413: sub user_load_handler { 1414: my ($cmd, $tail, $replyfd) = @_; 1415: 1416: my $userloadpercent=&Apache::lonnet::userload(); 1417: &Reply($replyfd, \$userloadpercent, "$cmd:$tail"); 1418: 1419: return 1; 1420: } 1421: &register_handler("userload", \&user_load_handler, 0, 1, 0); 1422: 1423: # Process a request for the authorization type of a user: 1424: # (userauth). 1425: # 1426: # Parameters: 1427: # $cmd - the actual keyword that invoked us. 1428: # $tail - the tail of the request that invoked us. 1429: # $replyfd- File descriptor connected to the client 1430: # Returns: 1431: # 1 - Ok to continue processing. 1432: # 0 - Program should exit 1433: # Implicit outputs: 1434: # The user authorization type is written to the client. 1435: # 1436: sub user_authorization_type { 1437: my ($cmd, $tail, $replyfd) = @_; 1438: 1439: my $userinput = "$cmd:$tail"; 1440: 1441: # Pull the domain and username out of the command tail. 1442: # and call get_auth_type to determine the authentication type. 1443: 1444: my ($udom,$uname)=split(/:/,$tail); 1445: my $result = &get_auth_type($udom, $uname); 1446: if($result eq "nouser") { 1447: &Failure( $replyfd, "unknown_user\n", $userinput); 1448: } else { 1449: # 1450: # We only want to pass the second field from get_auth_type 1451: # for ^krb.. otherwise we'll be handing out the encrypted 1452: # password for internals e.g. 1453: # 1454: my ($type,$otherinfo) = split(/:/,$result); 1455: if($type =~ /^krb/) { 1456: $type = $result; 1457: } else { 1458: $type .= ':'; 1459: } 1460: &Reply( $replyfd, \$type, $userinput); 1461: } 1462: 1463: return 1; 1464: } 1465: &register_handler("currentauth", \&user_authorization_type, 1, 1, 0); 1466: 1467: # Process a request by a manager to push a hosts or domain table 1468: # to us. We pick apart the command and pass it on to the subs 1469: # that already exist to do this. 1470: # 1471: # Parameters: 1472: # $cmd - the actual keyword that invoked us. 1473: # $tail - the tail of the request that invoked us. 1474: # $client - File descriptor connected to the client 1475: # Returns: 1476: # 1 - Ok to continue processing. 1477: # 0 - Program should exit 1478: # Implicit Output: 1479: # a reply is written to the client. 1480: sub push_file_handler { 1481: my ($cmd, $tail, $client) = @_; 1482: &Debug("In push file handler"); 1483: my $userinput = "$cmd:$tail"; 1484: 1485: # At this time we only know that the IP of our partner is a valid manager 1486: # the code below is a hook to do further authentication (e.g. to resolve 1487: # spoofing). 1488: 1489: my $cert = &GetCertificate($userinput); 1490: if(&ValidManager($cert)) { 1491: &Debug("Valid manager: $client"); 1492: 1493: # Now presumably we have the bona fides of both the peer host and the 1494: # process making the request. 1495: 1496: my $reply = &PushFile($userinput); 1497: &Reply($client, \$reply, $userinput); 1498: 1499: } else { 1500: &logthis("push_file_handler $client is not valid"); 1501: &Failure( $client, "refused\n", $userinput); 1502: } 1503: return 1; 1504: } 1505: &register_handler("pushfile", \&push_file_handler, 1, 0, 1); 1506: 1507: # The du_handler routine should be considered obsolete and is retained 1508: # for communication with legacy servers. Please see the du2_handler. 1509: # 1510: # du - list the disk usage of a directory recursively. 1511: # 1512: # note: stolen code from the ls file handler 1513: # under construction by Rick Banghart 1514: # . 1515: # Parameters: 1516: # $cmd - The command that dispatched us (du). 1517: # $ududir - The directory path to list... I'm not sure what this 1518: # is relative as things like ls:. return e.g. 1519: # no_such_dir. 1520: # $client - Socket open on the client. 1521: # Returns: 1522: # 1 - indicating that the daemon should not disconnect. 1523: # Side Effects: 1524: # The reply is written to $client. 1525: # 1526: sub du_handler { 1527: my ($cmd, $ududir, $client) = @_; 1528: ($ududir) = split(/:/,$ududir); # Make 'telnet' testing easier. 1529: my $userinput = "$cmd:$ududir"; 1530: 1531: if ($ududir=~/\.\./ || $ududir!~m|^/home/httpd/|) { 1532: &Failure($client,"refused\n","$cmd:$ududir"); 1533: return 1; 1534: } 1535: # Since $ududir could have some nasties in it, 1536: # we will require that ududir is a valid 1537: # directory. Just in case someone tries to 1538: # slip us a line like .;(cd /home/httpd rm -rf*) 1539: # etc. 1540: # 1541: if (-d $ududir) { 1542: my $total_size=0; 1543: my $code=sub { 1544: if ($_=~/\.\d+\./) { return;} 1545: if ($_=~/\.meta$/) { return;} 1546: if (-d $_) { return;} 1547: $total_size+=(stat($_))[7]; 1548: }; 1549: chdir($ududir); 1550: find($code,$ududir); 1551: $total_size=int($total_size/1024); 1552: &Reply($client,\$total_size,"$cmd:$ududir"); 1553: } else { 1554: &Failure($client, "bad_directory:$ududir\n","$cmd:$ududir"); 1555: } 1556: return 1; 1557: } 1558: &register_handler("du", \&du_handler, 0, 1, 0); 1559: 1560: # Please also see the du_handler, which is obsoleted by du2. 1561: # du2_handler differs from du_handler in that required path to directory 1562: # provided by &propath() is prepended in the handler instead of on the 1563: # client side. 1564: # 1565: # du2 - list the disk usage of a directory recursively. 1566: # 1567: # Parameters: 1568: # $cmd - The command that dispatched us (du). 1569: # $tail - The tail of the request that invoked us. 1570: # $tail is a : separated list of the following: 1571: # - $ududir - directory path to list (before prepending) 1572: # - $getpropath = 1 if &propath() should prepend 1573: # - $uname - username to use for &propath or user dir 1574: # - $udom - domain to use for &propath or user dir 1575: # All are escaped. 1576: # $client - Socket open on the client. 1577: # Returns: 1578: # 1 - indicating that the daemon should not disconnect. 1579: # Side Effects: 1580: # The reply is written to $client. 1581: # 1582: 1583: sub du2_handler { 1584: my ($cmd, $tail, $client) = @_; 1585: my ($ududir,$getpropath,$uname,$udom) = map { &unescape($_) } (split(/:/, $tail)); 1586: my $userinput = "$cmd:$tail"; 1587: if (($ududir=~/\.\./) || (($ududir!~m|^/home/httpd/|) && (!$getpropath))) { 1588: &Failure($client,"refused\n","$cmd:$tail"); 1589: return 1; 1590: } 1591: if ($getpropath) { 1592: if (($uname =~ /^$LONCAPA::match_name$/) && ($udom =~ /^$LONCAPA::match_domain$/)) { 1593: $ududir = &propath($udom,$uname).'/'.$ududir; 1594: } else { 1595: &Failure($client,"refused\n","$cmd:$tail"); 1596: return 1; 1597: } 1598: } 1599: # Since $ududir could have some nasties in it, 1600: # we will require that ududir is a valid 1601: # directory. Just in case someone tries to 1602: # slip us a line like .;(cd /home/httpd rm -rf*) 1603: # etc. 1604: # 1605: if (-d $ududir) { 1606: my $total_size=0; 1607: my $code=sub { 1608: if ($_=~/\.\d+\./) { return;} 1609: if ($_=~/\.meta$/) { return;} 1610: if (-d $_) { return;} 1611: $total_size+=(stat($_))[7]; 1612: }; 1613: chdir($ududir); 1614: find($code,$ududir); 1615: $total_size=int($total_size/1024); 1616: &Reply($client,\$total_size,"$cmd:$ududir"); 1617: } else { 1618: &Failure($client, "bad_directory:$ududir\n","$cmd:$tail"); 1619: } 1620: return 1; 1621: } 1622: &register_handler("du2", \&du2_handler, 0, 1, 0); 1623: 1624: # 1625: # The ls_handler routine should be considered obsolete and is retained 1626: # for communication with legacy servers. Please see the ls3_handler. 1627: # 1628: # ls - list the contents of a directory. For each file in the 1629: # selected directory the filename followed by the full output of 1630: # the stat function is returned. The returned info for each 1631: # file are separated by ':'. The stat fields are separated by &'s. 1632: # 1633: # If the requested path contains /../ or is: 1634: # 1635: # 1. for a directory, and the path does not begin with one of: 1636: # (a) /home/httpd/html/res/<domain> 1637: # (b) /home/httpd/html/userfiles/ 1638: # (c) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/userfiles 1639: # or is: 1640: # 1641: # 2. for a file, and the path (after prepending) does not begin with one of: 1642: # (a) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/ 1643: # (b) /home/httpd/html/res/<domain>/<username>/ 1644: # (c) /home/httpd/html/userfiles/<domain>/<username>/ 1645: # 1646: # the response will be "refused". 1647: # 1648: # Parameters: 1649: # $cmd - The command that dispatched us (ls). 1650: # $ulsdir - The directory path to list... I'm not sure what this 1651: # is relative as things like ls:. return e.g. 1652: # no_such_dir. 1653: # $client - Socket open on the client. 1654: # Returns: 1655: # 1 - indicating that the daemon should not disconnect. 1656: # Side Effects: 1657: # The reply is written to $client. 1658: # 1659: sub ls_handler { 1660: # obsoleted by ls2_handler 1661: my ($cmd, $ulsdir, $client) = @_; 1662: 1663: my $userinput = "$cmd:$ulsdir"; 1664: 1665: my $obs; 1666: my $rights; 1667: my $ulsout=''; 1668: my $ulsfn; 1669: if ($ulsdir =~m{/\.\./}) { 1670: &Failure($client,"refused\n",$userinput); 1671: return 1; 1672: } 1673: if (-e $ulsdir) { 1674: if(-d $ulsdir) { 1675: unless (($ulsdir =~ m{^/home/httpd/html/(res/$LONCAPA::match_domain|userfiles/)}) || 1676: ($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/userfiles})) { 1677: &Failure($client,"refused\n",$userinput); 1678: return 1; 1679: } 1680: if (opendir(LSDIR,$ulsdir)) { 1681: while ($ulsfn=readdir(LSDIR)) { 1682: undef($obs); 1683: undef($rights); 1684: my @ulsstats=stat($ulsdir.'/'.$ulsfn); 1685: #We do some obsolete checking here 1686: if(-e $ulsdir.'/'.$ulsfn.".meta") { 1687: open(FILE, $ulsdir.'/'.$ulsfn.".meta"); 1688: my @obsolete=<FILE>; 1689: foreach my $obsolete (@obsolete) { 1690: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; } 1691: if($obsolete =~ m|(<copyright>)(default)|) { $rights = 1; } 1692: } 1693: } 1694: $ulsout.=$ulsfn.'&'.join('&',@ulsstats); 1695: if($obs eq '1') { $ulsout.="&1"; } 1696: else { $ulsout.="&0"; } 1697: if($rights eq '1') { $ulsout.="&1:"; } 1698: else { $ulsout.="&0:"; } 1699: } 1700: closedir(LSDIR); 1701: } 1702: } else { 1703: unless (($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/}) || 1704: ($ulsdir =~ m{^/home/httpd/html/(?:res|userfiles)/$LONCAPA::match_domain/$LONCAPA::match_name/})) { 1705: &Failure($client,"refused\n",$userinput); 1706: return 1; 1707: } 1708: my @ulsstats=stat($ulsdir); 1709: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':'; 1710: } 1711: } else { 1712: $ulsout='no_such_dir'; 1713: } 1714: if ($ulsout eq '') { $ulsout='empty'; } 1715: &Reply($client, \$ulsout, $userinput); # This supports debug logging. 1716: 1717: return 1; 1718: 1719: } 1720: &register_handler("ls", \&ls_handler, 0, 1, 0); 1721: 1722: # The ls2_handler routine should be considered obsolete and is retained 1723: # for communication with legacy servers. Please see the ls3_handler. 1724: # Please also see the ls_handler, which was itself obsoleted by ls2. 1725: # ls2_handler differs from ls_handler in that it escapes its return 1726: # values before concatenating them together with ':'s. 1727: # 1728: # ls2 - list the contents of a directory. For each file in the 1729: # selected directory the filename followed by the full output of 1730: # the stat function is returned. The returned info for each 1731: # file are separated by ':'. The stat fields are separated by &'s. 1732: # 1733: # If the requested path contains /../ or is: 1734: # 1735: # 1. for a directory, and the path does not begin with one of: 1736: # (a) /home/httpd/html/res/<domain> 1737: # (b) /home/httpd/html/userfiles/ 1738: # (c) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/userfiles 1739: # or is: 1740: # 1741: # 2. for a file, and the path (after prepending) does not begin with one of: 1742: # (a) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/ 1743: # (b) /home/httpd/html/res/<domain>/<username>/ 1744: # (c) /home/httpd/html/userfiles/<domain>/<username>/ 1745: # 1746: # the response will be "refused". 1747: # 1748: # Parameters: 1749: # $cmd - The command that dispatched us (ls). 1750: # $ulsdir - The directory path to list... I'm not sure what this 1751: # is relative as things like ls:. return e.g. 1752: # no_such_dir. 1753: # $client - Socket open on the client. 1754: # Returns: 1755: # 1 - indicating that the daemon should not disconnect. 1756: # Side Effects: 1757: # The reply is written to $client. 1758: # 1759: sub ls2_handler { 1760: my ($cmd, $ulsdir, $client) = @_; 1761: 1762: my $userinput = "$cmd:$ulsdir"; 1763: 1764: my $obs; 1765: my $rights; 1766: my $ulsout=''; 1767: my $ulsfn; 1768: if ($ulsdir =~m{/\.\./}) { 1769: &Failure($client,"refused\n",$userinput); 1770: return 1; 1771: } 1772: if (-e $ulsdir) { 1773: if(-d $ulsdir) { 1774: unless (($ulsdir =~ m{^/home/httpd/html/(res/$LONCAPA::match_domain|userfiles/)}) || 1775: ($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/userfiles})) { 1776: &Failure($client,"refused\n","$userinput"); 1777: return 1; 1778: } 1779: if (opendir(LSDIR,$ulsdir)) { 1780: while ($ulsfn=readdir(LSDIR)) { 1781: undef($obs); 1782: undef($rights); 1783: my @ulsstats=stat($ulsdir.'/'.$ulsfn); 1784: #We do some obsolete checking here 1785: if(-e $ulsdir.'/'.$ulsfn.".meta") { 1786: open(FILE, $ulsdir.'/'.$ulsfn.".meta"); 1787: my @obsolete=<FILE>; 1788: foreach my $obsolete (@obsolete) { 1789: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; } 1790: if($obsolete =~ m|(<copyright>)(default)|) { 1791: $rights = 1; 1792: } 1793: } 1794: } 1795: my $tmp = $ulsfn.'&'.join('&',@ulsstats); 1796: if ($obs eq '1') { $tmp.="&1"; } else { $tmp.="&0"; } 1797: if ($rights eq '1') { $tmp.="&1"; } else { $tmp.="&0"; } 1798: $ulsout.= &escape($tmp).':'; 1799: } 1800: closedir(LSDIR); 1801: } 1802: } else { 1803: unless (($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/}) || 1804: ($ulsdir =~ m{^/home/httpd/html/(?:res|userfiles)/$LONCAPA::match_domain/$LONCAPA::match_name/})) { 1805: &Failure($client,"refused\n",$userinput); 1806: return 1; 1807: } 1808: my @ulsstats=stat($ulsdir); 1809: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':'; 1810: } 1811: } else { 1812: $ulsout='no_such_dir'; 1813: } 1814: if ($ulsout eq '') { $ulsout='empty'; } 1815: &Reply($client, \$ulsout, $userinput); # This supports debug logging. 1816: return 1; 1817: } 1818: &register_handler("ls2", \&ls2_handler, 0, 1, 0); 1819: # 1820: # ls3 - list the contents of a directory. For each file in the 1821: # selected directory the filename followed by the full output of 1822: # the stat function is returned. The returned info for each 1823: # file are separated by ':'. The stat fields are separated by &'s. 1824: # 1825: # If the requested path (after prepending) contains /../ or is: 1826: # 1827: # 1. for a directory, and the path does not begin with one of: 1828: # (a) /home/httpd/html/res/<domain> 1829: # (b) /home/httpd/html/userfiles/ 1830: # (c) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/userfiles 1831: # (d) /home/httpd/html/priv/<domain> and client is the homeserver 1832: # 1833: # or is: 1834: # 1835: # 2. for a file, and the path (after prepending) does not begin with one of: 1836: # (a) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/ 1837: # (b) /home/httpd/html/res/<domain>/<username>/ 1838: # (c) /home/httpd/html/userfiles/<domain>/<username>/ 1839: # (d) /home/httpd/html/priv/<domain>/<username>/ and client is the homeserver 1840: # 1841: # the response will be "refused". 1842: # 1843: # Parameters: 1844: # $cmd - The command that dispatched us (ls). 1845: # $tail - The tail of the request that invoked us. 1846: # $tail is a : separated list of the following: 1847: # - $ulsdir - directory path to list (before prepending) 1848: # - $getpropath = 1 if &propath() should prepend 1849: # - $getuserdir = 1 if path to user dir in lonUsers should 1850: # prepend 1851: # - $alternate_root - path to prepend 1852: # - $uname - username to use for &propath or user dir 1853: # - $udom - domain to use for &propath or user dir 1854: # All of these except $getpropath and &getuserdir are escaped. 1855: # no_such_dir. 1856: # $client - Socket open on the client. 1857: # Returns: 1858: # 1 - indicating that the daemon should not disconnect. 1859: # Side Effects: 1860: # The reply is written to $client. 1861: # 1862: 1863: sub ls3_handler { 1864: my ($cmd, $tail, $client) = @_; 1865: my $userinput = "$cmd:$tail"; 1866: my ($ulsdir,$getpropath,$getuserdir,$alternate_root,$uname,$udom) = 1867: split(/:/,$tail); 1868: if (defined($ulsdir)) { 1869: $ulsdir = &unescape($ulsdir); 1870: } 1871: if (defined($alternate_root)) { 1872: $alternate_root = &unescape($alternate_root); 1873: } 1874: if (defined($uname)) { 1875: $uname = &unescape($uname); 1876: } 1877: if (defined($udom)) { 1878: $udom = &unescape($udom); 1879: } 1880: 1881: my $dir_root = $perlvar{'lonDocRoot'}; 1882: if (($getpropath) || ($getuserdir)) { 1883: if (($uname =~ /^$LONCAPA::match_name$/) && ($udom =~ /^$LONCAPA::match_domain$/)) { 1884: $dir_root = &propath($udom,$uname); 1885: $dir_root =~ s/\/$//; 1886: } else { 1887: &Failure($client,"refused\n",$userinput); 1888: return 1; 1889: } 1890: } elsif ($alternate_root ne '') { 1891: $dir_root = $alternate_root; 1892: } 1893: if (($dir_root ne '') && ($dir_root ne '/')) { 1894: if ($ulsdir =~ /^\//) { 1895: $ulsdir = $dir_root.$ulsdir; 1896: } else { 1897: $ulsdir = $dir_root.'/'.$ulsdir; 1898: } 1899: } 1900: if ($ulsdir =~m{/\.\./}) { 1901: &Failure($client,"refused\n",$userinput); 1902: return 1; 1903: } 1904: my $islocal; 1905: my @machine_ids = &Apache::lonnet::current_machine_ids(); 1906: if (grep(/^\Q$clientname\E$/,@machine_ids)) { 1907: $islocal = 1; 1908: } 1909: my $obs; 1910: my $rights; 1911: my $ulsout=''; 1912: my $ulsfn; 1913: 1914: my ($crscheck,$toplevel,$currdom,$currnum,$skip); 1915: unless ($islocal) { 1916: my ($major,$minor) = split(/\./,$clientversion); 1917: if (($major < 2) || ($major == 2 && $minor < 12)) { 1918: $crscheck = 1; 1919: } 1920: } 1921: if (-e $ulsdir) { 1922: if(-d $ulsdir) { 1923: unless (($getpropath) || ($getuserdir) || 1924: ($ulsdir =~ m{^/home/httpd/html/(res/$LONCAPA::match_domain|userfiles/)}) || 1925: ($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/userfiles}) || 1926: (($ulsdir =~ m{^/home/httpd/html/priv/$LONCAPA::match_domain}) && ($islocal))) { 1927: &Failure($client,"refused\n",$userinput); 1928: return 1; 1929: } 1930: if (($crscheck) && 1931: ($ulsdir =~ m{^/home/httpd/html/res/($LONCAPA::match_domain)(/?$|/$LONCAPA::match_courseid)})) { 1932: ($currdom,my $posscnum) = ($1,$2); 1933: if (($posscnum eq '') || ($posscnum eq '/')) { 1934: $toplevel = 1; 1935: } else { 1936: $posscnum =~ s{^/+}{}; 1937: if (&LONCAPA::Lond::is_course($currdom,$posscnum)) { 1938: $skip = 1; 1939: } 1940: } 1941: } 1942: if ((!$skip) && (opendir(LSDIR,$ulsdir))) { 1943: while ($ulsfn=readdir(LSDIR)) { 1944: if (($crscheck) && ($toplevel) && ($currdom ne '') && 1945: ($ulsfn =~ /^$LONCAPA::match_courseid$/) && (-d "$ulsdir/$ulsfn")) { 1946: if (&LONCAPA::Lond::is_course($currdom,$ulsfn)) { 1947: next; 1948: } 1949: } 1950: undef($obs); 1951: undef($rights); 1952: my @ulsstats=stat($ulsdir.'/'.$ulsfn); 1953: #We do some obsolete checking here 1954: if(-e $ulsdir.'/'.$ulsfn.".meta") { 1955: open(FILE, $ulsdir.'/'.$ulsfn.".meta"); 1956: my @obsolete=<FILE>; 1957: foreach my $obsolete (@obsolete) { 1958: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; } 1959: if($obsolete =~ m|(<copyright>)(default)|) { 1960: $rights = 1; 1961: } 1962: } 1963: } 1964: my $tmp = $ulsfn.'&'.join('&',@ulsstats); 1965: if ($obs eq '1') { $tmp.="&1"; } else { $tmp.="&0"; } 1966: if ($rights eq '1') { $tmp.="&1"; } else { $tmp.="&0"; } 1967: $ulsout.= &escape($tmp).':'; 1968: } 1969: closedir(LSDIR); 1970: } 1971: } else { 1972: unless (($getpropath) || ($getuserdir) || 1973: ($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/}) || 1974: ($ulsdir =~ m{^/home/httpd/html/(?:res|userfiles)/$LONCAPA::match_domain/$LONCAPA::match_name/}) || 1975: (($ulsdir =~ m{^/home/httpd/html/priv/$LONCAPA::match_domain/$LONCAPA::match_name/}) && ($islocal))) { 1976: &Failure($client,"refused\n",$userinput); 1977: return 1; 1978: } 1979: my @ulsstats=stat($ulsdir); 1980: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':'; 1981: } 1982: } else { 1983: $ulsout='no_such_dir'; 1984: } 1985: if ($ulsout eq '') { $ulsout='empty'; } 1986: &Reply($client, \$ulsout, $userinput); # This supports debug logging. 1987: return 1; 1988: } 1989: &register_handler("ls3", \&ls3_handler, 0, 1, 0); 1990: 1991: sub read_lonnet_global { 1992: my ($cmd,$tail,$client) = @_; 1993: my $userinput = "$cmd:$tail"; 1994: my $requested = &Apache::lonnet::thaw_unescape($tail); 1995: my $result; 1996: my %packagevars = ( 1997: spareid => \%Apache::lonnet::spareid, 1998: perlvar => \%Apache::lonnet::perlvar, 1999: ); 2000: my %limit_to = ( 2001: perlvar => { 2002: lonOtherAuthen => 1, 2003: lonBalancer => 1, 2004: lonVersion => 1, 2005: lonAdmEMail => 1, 2006: lonSupportEMail => 1, 2007: lonSysEMail => 1, 2008: lonHostID => 1, 2009: lonRole => 1, 2010: lonDefDomain => 1, 2011: lonLoadLim => 1, 2012: lonUserLoadLim => 1, 2013: } 2014: ); 2015: if (ref($requested) eq 'HASH') { 2016: foreach my $what (keys(%{$requested})) { 2017: my $response; 2018: my $items = {}; 2019: if (exists($packagevars{$what})) { 2020: if (ref($limit_to{$what}) eq 'HASH') { 2021: foreach my $varname (keys(%{$packagevars{$what}})) { 2022: if ($limit_to{$what}{$varname}) { 2023: $items->{$varname} = $packagevars{$what}{$varname}; 2024: } 2025: } 2026: } else { 2027: $items = $packagevars{$what}; 2028: } 2029: if ($what eq 'perlvar') { 2030: if (!exists($packagevars{$what}{'lonBalancer'})) { 2031: if ($dist =~ /^(centos|rhes|fedora|scientific)/) { 2032: my $othervarref=LONCAPA::Configuration::read_conf('httpd.conf'); 2033: if (ref($othervarref) eq 'HASH') { 2034: $items->{'lonBalancer'} = $othervarref->{'lonBalancer'}; 2035: } 2036: } 2037: } 2038: } 2039: $response = &Apache::lonnet::freeze_escape($items); 2040: } 2041: $result .= &escape($what).'='.$response.'&'; 2042: } 2043: } 2044: $result =~ s/\&$//; 2045: &Reply($client,\$result,$userinput); 2046: return 1; 2047: } 2048: &register_handler("readlonnetglobal", \&read_lonnet_global, 0, 1, 0); 2049: 2050: sub server_devalidatecache_handler { 2051: my ($cmd,$tail,$client) = @_; 2052: my $userinput = "$cmd:$tail"; 2053: my $items = &unescape($tail); 2054: my @cached = split(/\&/,$items); 2055: foreach my $key (@cached) { 2056: if ($key =~ /:/) { 2057: my ($name,$id) = map { &unescape($_); } split(/:/,$key); 2058: &Apache::lonnet::devalidate_cache_new($name,$id); 2059: } 2060: } 2061: my $result = 'ok'; 2062: &Reply($client,\$result,$userinput); 2063: return 1; 2064: } 2065: &register_handler("devalidatecache", \&server_devalidatecache_handler, 0, 1, 0); 2066: 2067: sub server_timezone_handler { 2068: my ($cmd,$tail,$client) = @_; 2069: my $userinput = "$cmd:$tail"; 2070: my $timezone; 2071: my $clockfile = '/etc/sysconfig/clock'; # Fedora/CentOS/SuSE 2072: my $tzfile = '/etc/timezone'; # Debian/Ubuntu 2073: if (-e $clockfile) { 2074: if (open(my $fh,"<$clockfile")) { 2075: while (<$fh>) { 2076: next if (/^[\#\s]/); 2077: if (/^(?:TIME)?ZONE\s*=\s*['"]?\s*([\w\/]+)/) { 2078: $timezone = $1; 2079: last; 2080: } 2081: } 2082: close($fh); 2083: } 2084: } elsif (-e $tzfile) { 2085: if (open(my $fh,"<$tzfile")) { 2086: $timezone = <$fh>; 2087: close($fh); 2088: chomp($timezone); 2089: if ($timezone =~ m{^Etc/(\w+)$}) { 2090: $timezone = $1; 2091: } 2092: } 2093: } 2094: &Reply($client,\$timezone,$userinput); # This supports debug logging. 2095: return 1; 2096: } 2097: &register_handler("servertimezone", \&server_timezone_handler, 0, 1, 0); 2098: 2099: sub server_loncaparev_handler { 2100: my ($cmd,$tail,$client) = @_; 2101: my $userinput = "$cmd:$tail"; 2102: &Reply($client,\$perlvar{'lonVersion'},$userinput); 2103: return 1; 2104: } 2105: &register_handler("serverloncaparev", \&server_loncaparev_handler, 0, 1, 0); 2106: 2107: sub server_homeID_handler { 2108: my ($cmd,$tail,$client) = @_; 2109: my $userinput = "$cmd:$tail"; 2110: &Reply($client,\$perlvar{'lonHostID'},$userinput); 2111: return 1; 2112: } 2113: &register_handler("serverhomeID", \&server_homeID_handler, 0, 1, 0); 2114: 2115: sub server_distarch_handler { 2116: my ($cmd,$tail,$client) = @_; 2117: my $userinput = "$cmd:$tail"; 2118: my $reply = &distro_and_arch(); 2119: &Reply($client,\$reply,$userinput); 2120: return 1; 2121: } 2122: &register_handler("serverdistarch", \&server_distarch_handler, 0, 1, 0); 2123: 2124: sub server_certs_handler { 2125: my ($cmd,$tail,$client) = @_; 2126: my $userinput = "$cmd:$tail"; 2127: my $hostname = &Apache::lonnet::hostname($perlvar{'lonHostID'}); 2128: my $result = &LONCAPA::Lond::server_certs(\%perlvar,$perlvar{'lonHostID'},$hostname); 2129: &Reply($client,\$result,$userinput); 2130: return; 2131: } 2132: &register_handler("servercerts", \&server_certs_handler, 0, 1, 0); 2133: 2134: # Process a reinit request. Reinit requests that either 2135: # lonc or lond be reinitialized so that an updated 2136: # host.tab or domain.tab can be processed. 2137: # 2138: # Parameters: 2139: # $cmd - the actual keyword that invoked us. 2140: # $tail - the tail of the request that invoked us. 2141: # $client - File descriptor connected to the client 2142: # Returns: 2143: # 1 - Ok to continue processing. 2144: # 0 - Program should exit 2145: # Implicit output: 2146: # a reply is sent to the client. 2147: # 2148: sub reinit_process_handler { 2149: my ($cmd, $tail, $client) = @_; 2150: 2151: my $userinput = "$cmd:$tail"; 2152: 2153: my $cert = &GetCertificate($userinput); 2154: if(&ValidManager($cert)) { 2155: chomp($userinput); 2156: my $reply = &ReinitProcess($userinput); 2157: &Reply( $client, \$reply, $userinput); 2158: } else { 2159: &Failure( $client, "refused\n", $userinput); 2160: } 2161: return 1; 2162: } 2163: &register_handler("reinit", \&reinit_process_handler, 1, 0, 1); 2164: 2165: # Process the editing script for a table edit operation. 2166: # the editing operation must be encrypted and requested by 2167: # a manager host. 2168: # 2169: # Parameters: 2170: # $cmd - the actual keyword that invoked us. 2171: # $tail - the tail of the request that invoked us. 2172: # $client - File descriptor connected to the client 2173: # Returns: 2174: # 1 - Ok to continue processing. 2175: # 0 - Program should exit 2176: # Implicit output: 2177: # a reply is sent to the client. 2178: # 2179: sub edit_table_handler { 2180: my ($command, $tail, $client) = @_; 2181: 2182: my $userinput = "$command:$tail"; 2183: 2184: my $cert = &GetCertificate($userinput); 2185: if(&ValidManager($cert)) { 2186: my($filetype, $script) = split(/:/, $tail); 2187: if (($filetype eq "hosts") || 2188: ($filetype eq "domain")) { 2189: if($script ne "") { 2190: &Reply($client, # BUGBUG - EditFile 2191: &EditFile($userinput), # could fail. 2192: $userinput); 2193: } else { 2194: &Failure($client,"refused\n",$userinput); 2195: } 2196: } else { 2197: &Failure($client,"refused\n",$userinput); 2198: } 2199: } else { 2200: &Failure($client,"refused\n",$userinput); 2201: } 2202: return 1; 2203: } 2204: &register_handler("edit", \&edit_table_handler, 1, 0, 1); 2205: 2206: # 2207: # Authenticate a user against the LonCAPA authentication 2208: # database. Note that there are several authentication 2209: # possibilities: 2210: # - unix - The user can be authenticated against the unix 2211: # password file. 2212: # - internal - The user can be authenticated against a purely 2213: # internal per user password file. 2214: # - kerberos - The user can be authenticated against either a kerb4 or kerb5 2215: # ticket granting authority. 2216: # - user - The person tailoring LonCAPA can supply a user authentication 2217: # mechanism that is per system. 2218: # 2219: # Parameters: 2220: # $cmd - The command that got us here. 2221: # $tail - Tail of the command (remaining parameters). 2222: # $client - File descriptor connected to client. 2223: # Returns 2224: # 0 - Requested to exit, caller should shut down. 2225: # 1 - Continue processing. 2226: # Implicit inputs: 2227: # The authentication systems describe above have their own forms of implicit 2228: # input into the authentication process that are described above. 2229: # 2230: sub authenticate_handler { 2231: my ($cmd, $tail, $client) = @_; 2232: 2233: 2234: # Regenerate the full input line 2235: 2236: my $userinput = $cmd.":".$tail; 2237: 2238: # udom - User's domain. 2239: # uname - Username. 2240: # upass - User's password. 2241: # checkdefauth - Pass to validate_user() to try authentication 2242: # with default auth type(s) if no user account. 2243: # clientcancheckhost - Passed by clients with functionality in lonauth.pm 2244: # to check if session can be hosted. 2245: 2246: my ($udom, $uname, $upass, $checkdefauth, $clientcancheckhost)=split(/:/,$tail); 2247: &Debug(" Authenticate domain = $udom, user = $uname, password = $upass, checkdefauth = $checkdefauth"); 2248: chomp($upass); 2249: $upass=&unescape($upass); 2250: 2251: my $pwdcorrect = &validate_user($udom,$uname,$upass,$checkdefauth); 2252: if($pwdcorrect) { 2253: my $canhost = 1; 2254: unless ($clientcancheckhost) { 2255: my $uprimary_id = &Apache::lonnet::domain($udom,'primary'); 2256: my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id); 2257: my @intdoms; 2258: my $internet_names = &Apache::lonnet::get_internet_names($clientname); 2259: if (ref($internet_names) eq 'ARRAY') { 2260: @intdoms = @{$internet_names}; 2261: } 2262: unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) { 2263: my ($remote,$hosted); 2264: my $remotesession = &get_usersession_config($udom,'remotesession'); 2265: if (ref($remotesession) eq 'HASH') { 2266: $remote = $remotesession->{'remote'}; 2267: } 2268: my $hostedsession = &get_usersession_config($clienthomedom,'hostedsession'); 2269: if (ref($hostedsession) eq 'HASH') { 2270: $hosted = $hostedsession->{'hosted'}; 2271: } 2272: $canhost = &Apache::lonnet::can_host_session($udom,$clientname, 2273: $clientversion, 2274: $remote,$hosted); 2275: } 2276: } 2277: if ($canhost) { 2278: &Reply( $client, "authorized\n", $userinput); 2279: } else { 2280: &Reply( $client, "not_allowed_to_host\n", $userinput); 2281: } 2282: # 2283: # Bad credentials: Failed to authorize 2284: # 2285: } else { 2286: &Failure( $client, "non_authorized\n", $userinput); 2287: } 2288: 2289: return 1; 2290: } 2291: &register_handler("auth", \&authenticate_handler, 1, 1, 0); 2292: 2293: # 2294: # Change a user's password. Note that this function is complicated by 2295: # the fact that a user may be authenticated in more than one way: 2296: # At present, we are not able to change the password for all types of 2297: # authentication methods. Only for: 2298: # unix - unix password or shadow passoword style authentication. 2299: # local - Locally written authentication mechanism. 2300: # For now, kerb4 and kerb5 password changes are not supported and result 2301: # in an error. 2302: # FUTURE WORK: 2303: # Support kerberos passwd changes? 2304: # Parameters: 2305: # $cmd - The command that got us here. 2306: # $tail - Tail of the command (remaining parameters). 2307: # $client - File descriptor connected to client. 2308: # Returns 2309: # 0 - Requested to exit, caller should shut down. 2310: # 1 - Continue processing. 2311: # Implicit inputs: 2312: # The authentication systems describe above have their own forms of implicit 2313: # input into the authentication process that are described above. 2314: sub change_password_handler { 2315: my ($cmd, $tail, $client) = @_; 2316: 2317: my $userinput = $cmd.":".$tail; # Reconstruct client's string. 2318: 2319: # 2320: # udom - user's domain. 2321: # uname - Username. 2322: # upass - Current password. 2323: # npass - New password. 2324: # context - Context in which this was called 2325: # (preferences or reset_by_email). 2326: # lonhost - HostID of server where request originated 2327: 2328: my ($udom,$uname,$upass,$npass,$context,$lonhost)=split(/:/,$tail); 2329: 2330: $upass=&unescape($upass); 2331: $npass=&unescape($npass); 2332: &Debug("Trying to change password for $uname"); 2333: 2334: # First require that the user can be authenticated with their 2335: # old password unless context was 'reset_by_email': 2336: 2337: my ($validated,$failure); 2338: if ($context eq 'reset_by_email') { 2339: if ($lonhost eq '') { 2340: $failure = 'invalid_client'; 2341: } else { 2342: $validated = 1; 2343: } 2344: } else { 2345: $validated = &validate_user($udom, $uname, $upass); 2346: } 2347: if($validated) { 2348: my $realpasswd = &get_auth_type($udom, $uname); # Defined since authd. 2349: 2350: my ($howpwd,$contentpwd)=split(/:/,$realpasswd); 2351: if ($howpwd eq 'internal') { 2352: &Debug("internal auth"); 2353: my $ncpass = &hash_passwd($udom,$npass); 2354: if(&rewrite_password_file($udom, $uname, "internal:$ncpass")) { 2355: my $msg="Result of password change for $uname: pwchange_success"; 2356: if ($lonhost) { 2357: $msg .= " - request originated from: $lonhost"; 2358: } 2359: &logthis($msg); 2360: &update_passwd_history($uname,$udom,$howpwd,$context); 2361: &Reply($client, "ok\n", $userinput); 2362: } else { 2363: &logthis("Unable to open $uname passwd " 2364: ."to change password"); 2365: &Failure( $client, "non_authorized\n",$userinput); 2366: } 2367: } elsif ($howpwd eq 'unix' && $context ne 'reset_by_email') { 2368: my $result = &change_unix_password($uname, $npass); 2369: if ($result eq 'ok') { 2370: &update_passwd_history($uname,$udom,$howpwd,$context); 2371: } 2372: &logthis("Result of password change for $uname: ". 2373: $result); 2374: &Reply($client, \$result, $userinput); 2375: } else { 2376: # this just means that the current password mode is not 2377: # one we know how to change (e.g the kerberos auth modes or 2378: # locally written auth handler). 2379: # 2380: &Failure( $client, "auth_mode_error\n", $userinput); 2381: } 2382: 2383: } else { 2384: if ($failure eq '') { 2385: $failure = 'non_authorized'; 2386: } 2387: &Failure( $client, "$failure\n", $userinput); 2388: } 2389: 2390: return 1; 2391: } 2392: &register_handler("passwd", \&change_password_handler, 1, 1, 0); 2393: 2394: sub hash_passwd { 2395: my ($domain,$plainpass,@rest) = @_; 2396: my ($salt,$cost); 2397: if (@rest) { 2398: $cost = $rest[0]; 2399: # salt is first 22 characters, base-64 encoded by bcrypt 2400: my $plainsalt = substr($rest[1],0,22); 2401: $salt = Crypt::Eksblowfish::Bcrypt::de_base64($plainsalt); 2402: } else { 2403: my %domdefaults = &Apache::lonnet::get_domain_defaults($domain); 2404: my $defaultcost = $domdefaults{'intauth_cost'}; 2405: if (($defaultcost eq '') || ($defaultcost =~ /D/)) { 2406: $cost = 10; 2407: } else { 2408: $cost = $defaultcost; 2409: } 2410: # Generate random 16-octet base64 salt 2411: $salt = ""; 2412: $salt .= pack("C", int rand(256)) for 1..16; 2413: } 2414: my $hash = &Crypt::Eksblowfish::Bcrypt::bcrypt_hash({ 2415: key_nul => 1, 2416: cost => $cost, 2417: salt => $salt, 2418: }, Digest::SHA::sha512(Encode::encode('UTF-8',$plainpass))); 2419: 2420: my $result = join("!", "", "bcrypt", sprintf("%02d",$cost), 2421: &Crypt::Eksblowfish::Bcrypt::en_base64($salt). 2422: &Crypt::Eksblowfish::Bcrypt::en_base64($hash)); 2423: return $result; 2424: } 2425: 2426: # 2427: # Create a new user. User in this case means a lon-capa user. 2428: # The user must either already exist in some authentication realm 2429: # like kerberos or the /etc/passwd. If not, a user completely local to 2430: # this loncapa system is created. 2431: # 2432: # Parameters: 2433: # $cmd - The command that got us here. 2434: # $tail - Tail of the command (remaining parameters). 2435: # $client - File descriptor connected to client. 2436: # Returns 2437: # 0 - Requested to exit, caller should shut down. 2438: # 1 - Continue processing. 2439: # Implicit inputs: 2440: # The authentication systems describe above have their own forms of implicit 2441: # input into the authentication process that are described above. 2442: sub add_user_handler { 2443: 2444: my ($cmd, $tail, $client) = @_; 2445: 2446: 2447: my ($udom,$uname,$umode,$npass)=split(/:/,$tail); 2448: my $userinput = $cmd.":".$tail; # Reconstruct the full request line. 2449: 2450: &Debug("cmd =".$cmd." $udom =".$udom." uname=".$uname); 2451: 2452: 2453: if($udom eq $currentdomainid) { # Reject new users for other domains... 2454: 2455: my $oldumask=umask(0077); 2456: chomp($npass); 2457: $npass=&unescape($npass); 2458: my $passfilename = &password_path($udom, $uname); 2459: &Debug("Password file created will be:".$passfilename); 2460: if (-e $passfilename) { 2461: &Failure( $client, "already_exists\n", $userinput); 2462: } else { 2463: my $fperror=''; 2464: if (!&mkpath($passfilename)) { 2465: $fperror="error: ".($!+0)." mkdir failed while attempting " 2466: ."makeuser"; 2467: } 2468: unless ($fperror) { 2469: my $result=&make_passwd_file($uname,$udom,$umode,$npass, 2470: $passfilename,'makeuser'); 2471: &Reply($client,\$result, $userinput); #BUGBUG - could be fail 2472: } else { 2473: &Failure($client, \$fperror, $userinput); 2474: } 2475: } 2476: umask($oldumask); 2477: } else { 2478: &Failure($client, "not_right_domain\n", 2479: $userinput); # Even if we are multihomed. 2480: 2481: } 2482: return 1; 2483: 2484: } 2485: &register_handler("makeuser", \&add_user_handler, 1, 1, 0); 2486: 2487: # 2488: # Change the authentication method of a user. Note that this may 2489: # also implicitly change the user's password if, for example, the user is 2490: # joining an existing authentication realm. Known authentication realms at 2491: # this time are: 2492: # internal - Purely internal password file (only loncapa knows this user) 2493: # local - Institutionally written authentication module. 2494: # unix - Unix user (/etc/passwd with or without /etc/shadow). 2495: # kerb4 - kerberos version 4 2496: # kerb5 - kerberos version 5 2497: # 2498: # Parameters: 2499: # $cmd - The command that got us here. 2500: # $tail - Tail of the command (remaining parameters). 2501: # $client - File descriptor connected to client. 2502: # Returns 2503: # 0 - Requested to exit, caller should shut down. 2504: # 1 - Continue processing. 2505: # Implicit inputs: 2506: # The authentication systems describe above have their own forms of implicit 2507: # input into the authentication process that are described above. 2508: # NOTE: 2509: # This is also used to change the authentication credential values (e.g. passwd). 2510: # 2511: # 2512: sub change_authentication_handler { 2513: 2514: my ($cmd, $tail, $client) = @_; 2515: 2516: my $userinput = "$cmd:$tail"; # Reconstruct user input. 2517: 2518: my ($udom,$uname,$umode,$npass)=split(/:/,$tail); 2519: &Debug("cmd = ".$cmd." domain= ".$udom."uname =".$uname." umode= ".$umode); 2520: if ($udom ne $currentdomainid) { 2521: &Failure( $client, "not_right_domain\n", $client); 2522: } else { 2523: 2524: chomp($npass); 2525: 2526: $npass=&unescape($npass); 2527: my $oldauth = &get_auth_type($udom, $uname); # Get old auth info. 2528: my $passfilename = &password_path($udom, $uname); 2529: if ($passfilename) { # Not allowed to create a new user!! 2530: # If just changing the unix passwd. need to arrange to run 2531: # passwd since otherwise make_passwd_file will fail as 2532: # creation of unix authenticated users is no longer supported 2533: # except from the command line, when running make_domain_coordinator.pl 2534: 2535: if(($oldauth =~/^unix/) && ($umode eq "unix")) { 2536: my $result = &change_unix_password($uname, $npass); 2537: &logthis("Result of password change for $uname: ".$result); 2538: if ($result eq "ok") { 2539: &update_passwd_history($uname,$udom,$umode,'changeuserauth'); 2540: &Reply($client, \$result); 2541: } else { 2542: &Failure($client, \$result); 2543: } 2544: } else { 2545: my $result=&make_passwd_file($uname,$udom,$umode,$npass, 2546: $passfilename,'changeuserauth'); 2547: # 2548: # If the current auth mode is internal, and the old auth mode was 2549: # unix, or krb*, and the user is an author for this domain, 2550: # re-run manage_permissions for that role in order to be able 2551: # to take ownership of the construction space back to www:www 2552: # 2553: 2554: 2555: &Reply($client, \$result, $userinput); 2556: } 2557: 2558: 2559: } else { 2560: &Failure($client, "non_authorized\n", $userinput); # Fail the user now. 2561: } 2562: } 2563: return 1; 2564: } 2565: &register_handler("changeuserauth", \&change_authentication_handler, 1,1, 0); 2566: 2567: sub update_passwd_history { 2568: my ($uname,$udom,$umode,$context) = @_; 2569: my $proname=&propath($udom,$uname); 2570: my $now = time; 2571: if (open(my $fh,">>$proname/passwd.log")) { 2572: print $fh "$now:$umode:$context\n"; 2573: close($fh); 2574: } 2575: return; 2576: } 2577: 2578: # 2579: # Determines if this is the home server for a user. The home server 2580: # for a user will have his/her lon-capa passwd file. Therefore all we need 2581: # to do is determine if this file exists. 2582: # 2583: # Parameters: 2584: # $cmd - The command that got us here. 2585: # $tail - Tail of the command (remaining parameters). 2586: # $client - File descriptor connected to client. 2587: # Returns 2588: # 0 - Requested to exit, caller should shut down. 2589: # 1 - Continue processing. 2590: # Implicit inputs: 2591: # The authentication systems describe above have their own forms of implicit 2592: # input into the authentication process that are described above. 2593: # 2594: sub is_home_handler { 2595: my ($cmd, $tail, $client) = @_; 2596: 2597: my $userinput = "$cmd:$tail"; 2598: 2599: my ($udom,$uname)=split(/:/,$tail); 2600: chomp($uname); 2601: my $passfile = &password_filename($udom, $uname); 2602: if($passfile) { 2603: &Reply( $client, "found\n", $userinput); 2604: } else { 2605: &Failure($client, "not_found\n", $userinput); 2606: } 2607: return 1; 2608: } 2609: &register_handler("home", \&is_home_handler, 0,1,0); 2610: 2611: # 2612: # Process an update request for a resource. 2613: # A resource has been modified that we hold a subscription to. 2614: # If the resource is not local, then we must update, or at least invalidate our 2615: # cached copy of the resource. 2616: # Parameters: 2617: # $cmd - The command that got us here. 2618: # $tail - Tail of the command (remaining parameters). 2619: # $client - File descriptor connected to client. 2620: # Returns 2621: # 0 - Requested to exit, caller should shut down. 2622: # 1 - Continue processing. 2623: # Implicit inputs: 2624: # The authentication systems describe above have their own forms of implicit 2625: # input into the authentication process that are described above. 2626: # 2627: sub update_resource_handler { 2628: 2629: my ($cmd, $tail, $client) = @_; 2630: 2631: my $userinput = "$cmd:$tail"; 2632: 2633: my $fname= $tail; # This allows interactive testing 2634: 2635: 2636: my $ownership=ishome($fname); 2637: if ($ownership eq 'not_owner') { 2638: if (-e $fname) { 2639: # Delete preview file, if exists 2640: unlink("$fname.tmp"); 2641: # Get usage stats 2642: my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size, 2643: $atime,$mtime,$ctime,$blksize,$blocks)=stat($fname); 2644: my $now=time; 2645: my $since=$now-$atime; 2646: # If the file has not been used within lonExpire seconds, 2647: # unsubscribe from it and delete local copy 2648: if ($since>$perlvar{'lonExpire'}) { 2649: my $reply=&Apache::lonnet::reply("unsub:$fname","$clientname"); 2650: &devalidate_meta_cache($fname); 2651: unlink("$fname"); 2652: unlink("$fname.meta"); 2653: } else { 2654: # Yes, this is in active use. Get a fresh copy. Since it might be in 2655: # very active use and huge (like a movie), copy it to "in.transfer" filename first. 2656: my $transname="$fname.in.transfer"; 2657: my $remoteurl=&Apache::lonnet::reply("sub:$fname","$clientname"); 2658: my $response; 2659: # FIXME: cannot replicate files that take more than two minutes to transfer -- needs checking now 1200s timeout used 2660: # for LWP request. 2661: my $request=new HTTP::Request('GET',"$remoteurl"); 2662: $response=&LONCAPA::LWPReq::makerequest($clientname,$request,$transname,\%perlvar,1200,0,1); 2663: if ($response->is_error()) { 2664: my $reply=&Apache::lonnet::reply("unsub:$fname","$clientname"); 2665: &devalidate_meta_cache($fname); 2666: if (-e $transname) { 2667: unlink($transname); 2668: } 2669: unlink($fname); 2670: my $message=$response->status_line; 2671: &logthis("LWP GET: $message for $fname ($remoteurl)"); 2672: } else { 2673: if ($remoteurl!~/\.meta$/) { 2674: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta'); 2675: my $mresponse = &LONCAPA::LWPReq::makerequest($clientname,$mrequest,$fname.'.meta',\%perlvar,120,0,1); 2676: if ($mresponse->is_error()) { 2677: unlink($fname.'.meta'); 2678: } 2679: } 2680: # we successfully transfered, copy file over to real name 2681: rename($transname,$fname); 2682: &devalidate_meta_cache($fname); 2683: } 2684: } 2685: &Reply( $client, "ok\n", $userinput); 2686: } else { 2687: &Failure($client, "not_found\n", $userinput); 2688: } 2689: } else { 2690: &Failure($client, "rejected\n", $userinput); 2691: } 2692: return 1; 2693: } 2694: &register_handler("update", \&update_resource_handler, 0 ,1, 0); 2695: 2696: sub devalidate_meta_cache { 2697: my ($url) = @_; 2698: use Cache::Memcached; 2699: my $memcache = new Cache::Memcached({'servers'=>['127.0.0.1:11211']}); 2700: $url = &Apache::lonnet::declutter($url); 2701: $url =~ s-\.meta$--; 2702: my $id = &escape('meta:'.$url); 2703: $memcache->delete($id); 2704: } 2705: 2706: # 2707: # Fetch a user file from a remote server to the user's home directory 2708: # userfiles subdir. 2709: # Parameters: 2710: # $cmd - The command that got us here. 2711: # $tail - Tail of the command (remaining parameters). 2712: # $client - File descriptor connected to client. 2713: # Returns 2714: # 0 - Requested to exit, caller should shut down. 2715: # 1 - Continue processing. 2716: # 2717: sub fetch_user_file_handler { 2718: 2719: my ($cmd, $tail, $client) = @_; 2720: 2721: my $userinput = "$cmd:$tail"; 2722: my $fname = $tail; 2723: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|); 2724: my $udir=&propath($udom,$uname).'/userfiles'; 2725: unless (-e $udir) { 2726: mkdir($udir,0770); 2727: } 2728: Debug("fetch user file for $fname"); 2729: if (-e $udir) { 2730: $ufile=~s/^[\.\~]+//; 2731: 2732: # IF necessary, create the path right down to the file. 2733: # Note that any regular files in the way of this path are 2734: # wiped out to deal with some earlier folly of mine. 2735: 2736: if (!&mkpath($udir.'/'.$ufile)) { 2737: &Failure($client, "unable_to_create\n", $userinput); 2738: } 2739: 2740: my $destname=$udir.'/'.$ufile; 2741: my $transname=$udir.'/'.$ufile.'.in.transit'; 2742: my $clientprotocol=$Apache::lonnet::protocol{$clientname}; 2743: $clientprotocol = 'http' if ($clientprotocol ne 'https'); 2744: my $clienthost = &Apache::lonnet::hostname($clientname); 2745: my $remoteurl=$clientprotocol.'://'.$clienthost.'/userfiles/'.$fname; 2746: my $response; 2747: Debug("Remote URL : $remoteurl Transfername $transname Destname: $destname"); 2748: my $request=new HTTP::Request('GET',"$remoteurl"); 2749: my $verifycert = 1; 2750: my @machine_ids = &Apache::lonnet::current_machine_ids(); 2751: if (grep(/^\Q$clientname\E$/,@machine_ids)) { 2752: $verifycert = 0; 2753: } 2754: $response = &LONCAPA::LWPReq::makerequest($clientname,$request,$transname,\%perlvar,1200,$verifycert); 2755: if ($response->is_error()) { 2756: unlink($transname); 2757: my $message=$response->status_line; 2758: &logthis("LWP GET: $message for $fname ($remoteurl)"); 2759: &Failure($client, "failed\n", $userinput); 2760: } else { 2761: Debug("Renaming $transname to $destname"); 2762: if (!rename($transname,$destname)) { 2763: &logthis("Unable to move $transname to $destname"); 2764: unlink($transname); 2765: &Failure($client, "failed\n", $userinput); 2766: } else { 2767: if ($fname =~ /^default.+\.(page|sequence)$/) { 2768: my ($major,$minor) = split(/\./,$clientversion); 2769: if (($major < 2) || ($major == 2 && $minor < 11)) { 2770: my $now = time; 2771: &Apache::lonnet::do_cache_new('crschange',$udom.'_'.$uname,$now,600); 2772: my $key = &escape('internal.contentchange'); 2773: my $what = "$key=$now"; 2774: my $hashref = &tie_user_hash($udom,$uname,'environment', 2775: &GDBM_WRCREAT(),"P",$what); 2776: if ($hashref) { 2777: $hashref->{$key}=$now; 2778: if (!&untie_user_hash($hashref)) { 2779: &logthis("error: ".($!+0)." untie (GDBM) failed ". 2780: "when updating internal.contentchange"); 2781: } 2782: } 2783: } 2784: } 2785: &Reply($client, "ok\n", $userinput); 2786: } 2787: } 2788: } else { 2789: &Failure($client, "not_home\n", $userinput); 2790: } 2791: return 1; 2792: } 2793: &register_handler("fetchuserfile", \&fetch_user_file_handler, 0, 1, 0); 2794: 2795: # 2796: # Remove a file from a user's home directory userfiles subdirectory. 2797: # Parameters: 2798: # cmd - the Lond request keyword that got us here. 2799: # tail - the part of the command past the keyword. 2800: # client- File descriptor connected with the client. 2801: # 2802: # Returns: 2803: # 1 - Continue processing. 2804: sub remove_user_file_handler { 2805: my ($cmd, $tail, $client) = @_; 2806: 2807: my ($fname) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent. 2808: 2809: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|); 2810: if ($ufile =~m|/\.\./|) { 2811: # any files paths with /../ in them refuse 2812: # to deal with 2813: &Failure($client, "refused\n", "$cmd:$tail"); 2814: } else { 2815: my $udir = &propath($udom,$uname); 2816: if (-e $udir) { 2817: my $file=$udir.'/userfiles/'.$ufile; 2818: if (-e $file) { 2819: # 2820: # If the file is a regular file unlink is fine... 2821: # However it's possible the client wants a dir 2822: # removed, in which case rmdir is more appropriate. 2823: # Note: rmdir will only remove an empty directory. 2824: # 2825: if (-f $file){ 2826: unlink($file); 2827: # for html files remove the associated .bak file 2828: # which may have been created by the editor. 2829: if ($ufile =~ m{^((docs|supplemental)/(?:\d+|default)/\d+(?:|/.+)/)[^/]+\.x?html?$}i) { 2830: my $path = $1; 2831: if (-e $file.'.bak') { 2832: unlink($file.'.bak'); 2833: } 2834: } 2835: } elsif(-d $file) { 2836: rmdir($file); 2837: } 2838: if (-e $file) { 2839: # File is still there after we deleted it ?!? 2840: 2841: &Failure($client, "failed\n", "$cmd:$tail"); 2842: } else { 2843: &Reply($client, "ok\n", "$cmd:$tail"); 2844: } 2845: } else { 2846: &Failure($client, "not_found\n", "$cmd:$tail"); 2847: } 2848: } else { 2849: &Failure($client, "not_home\n", "$cmd:$tail"); 2850: } 2851: } 2852: return 1; 2853: } 2854: &register_handler("removeuserfile", \&remove_user_file_handler, 0,1,0); 2855: 2856: # 2857: # make a directory in a user's home directory userfiles subdirectory. 2858: # Parameters: 2859: # cmd - the Lond request keyword that got us here. 2860: # tail - the part of the command past the keyword. 2861: # client- File descriptor connected with the client. 2862: # 2863: # Returns: 2864: # 1 - Continue processing. 2865: sub mkdir_user_file_handler { 2866: my ($cmd, $tail, $client) = @_; 2867: 2868: my ($dir) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent. 2869: $dir=&unescape($dir); 2870: my ($udom,$uname,$ufile) = ($dir =~ m|^([^/]+)/([^/]+)/(.+)$|); 2871: if ($ufile =~m|/\.\./|) { 2872: # any files paths with /../ in them refuse 2873: # to deal with 2874: &Failure($client, "refused\n", "$cmd:$tail"); 2875: } else { 2876: my $udir = &propath($udom,$uname); 2877: if (-e $udir) { 2878: my $newdir=$udir.'/userfiles/'.$ufile.'/'; 2879: if (!&mkpath($newdir)) { 2880: &Failure($client, "failed\n", "$cmd:$tail"); 2881: } 2882: &Reply($client, "ok\n", "$cmd:$tail"); 2883: } else { 2884: &Failure($client, "not_home\n", "$cmd:$tail"); 2885: } 2886: } 2887: return 1; 2888: } 2889: &register_handler("mkdiruserfile", \&mkdir_user_file_handler, 0,1,0); 2890: 2891: # 2892: # rename a file in a user's home directory userfiles subdirectory. 2893: # Parameters: 2894: # cmd - the Lond request keyword that got us here. 2895: # tail - the part of the command past the keyword. 2896: # client- File descriptor connected with the client. 2897: # 2898: # Returns: 2899: # 1 - Continue processing. 2900: sub rename_user_file_handler { 2901: my ($cmd, $tail, $client) = @_; 2902: 2903: my ($udom,$uname,$old,$new) = split(/:/, $tail); 2904: $old=&unescape($old); 2905: $new=&unescape($new); 2906: if ($new =~m|/\.\./| || $old =~m|/\.\./|) { 2907: # any files paths with /../ in them refuse to deal with 2908: &Failure($client, "refused\n", "$cmd:$tail"); 2909: } else { 2910: my $udir = &propath($udom,$uname); 2911: if (-e $udir) { 2912: my $oldfile=$udir.'/userfiles/'.$old; 2913: my $newfile=$udir.'/userfiles/'.$new; 2914: if (-e $newfile) { 2915: &Failure($client, "exists\n", "$cmd:$tail"); 2916: } elsif (! -e $oldfile) { 2917: &Failure($client, "not_found\n", "$cmd:$tail"); 2918: } else { 2919: if (!rename($oldfile,$newfile)) { 2920: &Failure($client, "failed\n", "$cmd:$tail"); 2921: } else { 2922: &Reply($client, "ok\n", "$cmd:$tail"); 2923: } 2924: } 2925: } else { 2926: &Failure($client, "not_home\n", "$cmd:$tail"); 2927: } 2928: } 2929: return 1; 2930: } 2931: &register_handler("renameuserfile", \&rename_user_file_handler, 0,1,0); 2932: 2933: # 2934: # Checks if the specified user has an active session on the server 2935: # return ok if so, not_found if not 2936: # 2937: # Parameters: 2938: # cmd - The request keyword that dispatched to tus. 2939: # tail - The tail of the request (colon separated parameters). 2940: # client - Filehandle open on the client. 2941: # Return: 2942: # 1. 2943: sub user_has_session_handler { 2944: my ($cmd, $tail, $client) = @_; 2945: 2946: my ($udom, $uname) = map { &unescape($_) } (split(/:/, $tail)); 2947: 2948: opendir(DIR,$perlvar{'lonIDsDir'}); 2949: my $filename; 2950: while ($filename=readdir(DIR)) { 2951: last if ($filename=~/^\Q$uname\E_\d+_\Q$udom\E_/); 2952: } 2953: if ($filename) { 2954: &Reply($client, "ok\n", "$cmd:$tail"); 2955: } else { 2956: &Failure($client, "not_found\n", "$cmd:$tail"); 2957: } 2958: return 1; 2959: 2960: } 2961: &register_handler("userhassession", \&user_has_session_handler, 0,1,0); 2962: 2963: # 2964: # Authenticate access to a user file by checking that the token the user's 2965: # passed also exists in their session file 2966: # 2967: # Parameters: 2968: # cmd - The request keyword that dispatched to tus. 2969: # tail - The tail of the request (colon separated parameters). 2970: # client - Filehandle open on the client. 2971: # Return: 2972: # 1. 2973: sub token_auth_user_file_handler { 2974: my ($cmd, $tail, $client) = @_; 2975: 2976: my ($fname, $session) = split(/:/, $tail); 2977: 2978: chomp($session); 2979: my $reply="non_auth"; 2980: my $file = $perlvar{'lonIDsDir'}.'/'.$session.'.id'; 2981: if (open(ENVIN,"$file")) { 2982: flock(ENVIN,LOCK_SH); 2983: tie(my %disk_env,'GDBM_File',"$file",&GDBM_READER(),0640); 2984: if (exists($disk_env{"userfile.$fname"})) { 2985: $reply="ok"; 2986: } else { 2987: foreach my $envname (keys(%disk_env)) { 2988: if ($envname=~ m|^userfile\.\Q$fname\E|) { 2989: $reply="ok"; 2990: last; 2991: } 2992: } 2993: } 2994: untie(%disk_env); 2995: close(ENVIN); 2996: &Reply($client, \$reply, "$cmd:$tail"); 2997: } else { 2998: &Failure($client, "invalid_token\n", "$cmd:$tail"); 2999: } 3000: return 1; 3001: 3002: } 3003: &register_handler("tokenauthuserfile", \&token_auth_user_file_handler, 0,1,0); 3004: 3005: # 3006: # Unsubscribe from a resource. 3007: # 3008: # Parameters: 3009: # $cmd - The command that got us here. 3010: # $tail - Tail of the command (remaining parameters). 3011: # $client - File descriptor connected to client. 3012: # Returns 3013: # 0 - Requested to exit, caller should shut down. 3014: # 1 - Continue processing. 3015: # 3016: sub unsubscribe_handler { 3017: my ($cmd, $tail, $client) = @_; 3018: 3019: my $userinput= "$cmd:$tail"; 3020: 3021: my ($fname) = split(/:/,$tail); # Split in case there's extrs. 3022: 3023: &Debug("Unsubscribing $fname"); 3024: if (-e $fname) { 3025: &Debug("Exists"); 3026: &Reply($client, &unsub($fname,$clientip), $userinput); 3027: } else { 3028: &Failure($client, "not_found\n", $userinput); 3029: } 3030: return 1; 3031: } 3032: &register_handler("unsub", \&unsubscribe_handler, 0, 1, 0); 3033: 3034: # Subscribe to a resource 3035: # 3036: # Parameters: 3037: # $cmd - The command that got us here. 3038: # $tail - Tail of the command (remaining parameters). 3039: # $client - File descriptor connected to client. 3040: # Returns 3041: # 0 - Requested to exit, caller should shut down. 3042: # 1 - Continue processing. 3043: # 3044: sub subscribe_handler { 3045: my ($cmd, $tail, $client)= @_; 3046: 3047: my $userinput = "$cmd:$tail"; 3048: 3049: &Reply( $client, &subscribe($userinput,$clientip), $userinput); 3050: 3051: return 1; 3052: } 3053: &register_handler("sub", \&subscribe_handler, 0, 1, 0); 3054: 3055: # 3056: # Determine the latest version of a resource (it looks for the highest 3057: # past version and then returns that +1) 3058: # 3059: # Parameters: 3060: # $cmd - The command that got us here. 3061: # $tail - Tail of the command (remaining parameters). 3062: # (Should consist of an absolute path to a file) 3063: # $client - File descriptor connected to client. 3064: # Returns 3065: # 0 - Requested to exit, caller should shut down. 3066: # 1 - Continue processing. 3067: # 3068: sub current_version_handler { 3069: my ($cmd, $tail, $client) = @_; 3070: 3071: my $userinput= "$cmd:$tail"; 3072: 3073: my $fname = $tail; 3074: &Reply( $client, &currentversion($fname)."\n", $userinput); 3075: return 1; 3076: 3077: } 3078: &register_handler("currentversion", \&current_version_handler, 0, 1, 0); 3079: 3080: # Make an entry in a user's activity log. 3081: # 3082: # Parameters: 3083: # $cmd - The command that got us here. 3084: # $tail - Tail of the command (remaining parameters). 3085: # $client - File descriptor connected to client. 3086: # Returns 3087: # 0 - Requested to exit, caller should shut down. 3088: # 1 - Continue processing. 3089: # 3090: sub activity_log_handler { 3091: my ($cmd, $tail, $client) = @_; 3092: 3093: 3094: my $userinput= "$cmd:$tail"; 3095: 3096: my ($udom,$uname,$what)=split(/:/,$tail); 3097: chomp($what); 3098: my $proname=&propath($udom,$uname); 3099: my $now=time; 3100: my $hfh; 3101: if ($hfh=IO::File->new(">>$proname/activity.log")) { 3102: print $hfh "$now:$clientname:$what\n"; 3103: &Reply( $client, "ok\n", $userinput); 3104: } else { 3105: &Failure($client, "error: ".($!+0)." IO::File->new Failed " 3106: ."while attempting log\n", 3107: $userinput); 3108: } 3109: 3110: return 1; 3111: } 3112: &register_handler("log", \&activity_log_handler, 0, 1, 0); 3113: 3114: # 3115: # Put a namespace entry in a user profile hash. 3116: # My druthers would be for this to be an encrypted interaction too. 3117: # anything that might be an inadvertent covert channel about either 3118: # user authentication or user personal information.... 3119: # 3120: # Parameters: 3121: # $cmd - The command that got us here. 3122: # $tail - Tail of the command (remaining parameters). 3123: # $client - File descriptor connected to client. 3124: # Returns 3125: # 0 - Requested to exit, caller should shut down. 3126: # 1 - Continue processing. 3127: # 3128: sub put_user_profile_entry { 3129: my ($cmd, $tail, $client) = @_; 3130: 3131: my $userinput = "$cmd:$tail"; 3132: 3133: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4); 3134: if ($namespace ne 'roles') { 3135: chomp($what); 3136: my $hashref = &tie_user_hash($udom, $uname, $namespace, 3137: &GDBM_WRCREAT(),"P",$what); 3138: if($hashref) { 3139: my @pairs=split(/\&/,$what); 3140: foreach my $pair (@pairs) { 3141: my ($key,$value)=split(/=/,$pair); 3142: $hashref->{$key}=$value; 3143: } 3144: if (&untie_user_hash($hashref)) { 3145: &Reply( $client, "ok\n", $userinput); 3146: } else { 3147: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ". 3148: "while attempting put\n", 3149: $userinput); 3150: } 3151: } else { 3152: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ". 3153: "while attempting put\n", $userinput); 3154: } 3155: } else { 3156: &Failure( $client, "refused\n", $userinput); 3157: } 3158: 3159: return 1; 3160: } 3161: &register_handler("put", \&put_user_profile_entry, 0, 1, 0); 3162: 3163: # Put a piece of new data in hash, returns error if entry already exists 3164: # Parameters: 3165: # $cmd - The command that got us here. 3166: # $tail - Tail of the command (remaining parameters). 3167: # $client - File descriptor connected to client. 3168: # Returns 3169: # 0 - Requested to exit, caller should shut down. 3170: # 1 - Continue processing. 3171: # 3172: sub newput_user_profile_entry { 3173: my ($cmd, $tail, $client) = @_; 3174: 3175: my $userinput = "$cmd:$tail"; 3176: 3177: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4); 3178: if ($namespace eq 'roles') { 3179: &Failure( $client, "refused\n", $userinput); 3180: return 1; 3181: } 3182: 3183: chomp($what); 3184: 3185: my $hashref = &tie_user_hash($udom, $uname, $namespace, 3186: &GDBM_WRCREAT(),"N",$what); 3187: if(!$hashref) { 3188: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ". 3189: "while attempting put\n", $userinput); 3190: return 1; 3191: } 3192: 3193: my @pairs=split(/\&/,$what); 3194: foreach my $pair (@pairs) { 3195: my ($key,$value)=split(/=/,$pair); 3196: if (exists($hashref->{$key})) { 3197: if (!&untie_user_hash($hashref)) { 3198: &logthis("error: ".($!+0)." untie (GDBM) failed ". 3199: "while attempting newput - early out as key exists"); 3200: } 3201: &Failure($client, "key_exists: ".$key."\n",$userinput); 3202: return 1; 3203: } 3204: } 3205: 3206: foreach my $pair (@pairs) { 3207: my ($key,$value)=split(/=/,$pair); 3208: $hashref->{$key}=$value; 3209: } 3210: 3211: if (&untie_user_hash($hashref)) { 3212: &Reply( $client, "ok\n", $userinput); 3213: } else { 3214: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ". 3215: "while attempting put\n", 3216: $userinput); 3217: } 3218: return 1; 3219: } 3220: &register_handler("newput", \&newput_user_profile_entry, 0, 1, 0); 3221: 3222: # 3223: # Increment a profile entry in the user history file. 3224: # The history contains keyword value pairs. In this case, 3225: # The value itself is a pair of numbers. The first, the current value 3226: # the second an increment that this function applies to the current 3227: # value. 3228: # 3229: # Parameters: 3230: # $cmd - The command that got us here. 3231: # $tail - Tail of the command (remaining parameters). 3232: # $client - File descriptor connected to client. 3233: # Returns 3234: # 0 - Requested to exit, caller should shut down. 3235: # 1 - Continue processing. 3236: # 3237: sub increment_user_value_handler { 3238: my ($cmd, $tail, $client) = @_; 3239: 3240: my $userinput = "$cmd:$tail"; 3241: 3242: my ($udom,$uname,$namespace,$what) =split(/:/,$tail); 3243: if ($namespace ne 'roles') { 3244: chomp($what); 3245: my $hashref = &tie_user_hash($udom, $uname, 3246: $namespace, &GDBM_WRCREAT(), 3247: "P",$what); 3248: if ($hashref) { 3249: my @pairs=split(/\&/,$what); 3250: foreach my $pair (@pairs) { 3251: my ($key,$value)=split(/=/,$pair); 3252: $value = &unescape($value); 3253: # We could check that we have a number... 3254: if (! defined($value) || $value eq '') { 3255: $value = 1; 3256: } 3257: $hashref->{$key}+=$value; 3258: if ($namespace eq 'nohist_resourcetracker') { 3259: if ($hashref->{$key} < 0) { 3260: $hashref->{$key} = 0; 3261: } 3262: } 3263: } 3264: if (&untie_user_hash($hashref)) { 3265: &Reply( $client, "ok\n", $userinput); 3266: } else { 3267: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ". 3268: "while attempting inc\n", $userinput); 3269: } 3270: } else { 3271: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ". 3272: "while attempting inc\n", $userinput); 3273: } 3274: } else { 3275: &Failure($client, "refused\n", $userinput); 3276: } 3277: 3278: return 1; 3279: } 3280: &register_handler("inc", \&increment_user_value_handler, 0, 1, 0); 3281: 3282: # 3283: # Put a new role for a user. Roles are LonCAPA's packaging of permissions. 3284: # Each 'role' a user has implies a set of permissions. Adding a new role 3285: # for a person grants the permissions packaged with that role 3286: # to that user when the role is selected. 3287: # 3288: # Parameters: 3289: # $cmd - The command string (rolesput). 3290: # $tail - The remainder of the request line. For rolesput this 3291: # consists of a colon separated list that contains: 3292: # The domain and user that is granting the role (logged). 3293: # The domain and user that is getting the role. 3294: # The roles being granted as a set of & separated pairs. 3295: # each pair a key value pair. 3296: # $client - File descriptor connected to the client. 3297: # Returns: 3298: # 0 - If the daemon should exit 3299: # 1 - To continue processing. 3300: # 3301: # 3302: sub roles_put_handler { 3303: my ($cmd, $tail, $client) = @_; 3304: 3305: my $userinput = "$cmd:$tail"; 3306: 3307: my ( $exedom, $exeuser, $udom, $uname, $what) = split(/:/,$tail); 3308: 3309: 3310: my $namespace='roles'; 3311: chomp($what); 3312: my $hashref = &tie_user_hash($udom, $uname, $namespace, 3313: &GDBM_WRCREAT(), "P", 3314: "$exedom:$exeuser:$what"); 3315: # 3316: # Log the attempt to set a role. The {}'s here ensure that the file 3317: # handle is open for the minimal amount of time. Since the flush 3318: # is done on close this improves the chances the log will be an un- 3319: # corrupted ordered thing. 3320: if ($hashref) { 3321: my $pass_entry = &get_auth_type($udom, $uname); 3322: my ($auth_type,$pwd) = split(/:/, $pass_entry); 3323: $auth_type = $auth_type.":"; 3324: my @pairs=split(/\&/,$what); 3325: foreach my $pair (@pairs) { 3326: my ($key,$value)=split(/=/,$pair); 3327: &manage_permissions($key, $udom, $uname, 3328: $auth_type); 3329: $hashref->{$key}=$value; 3330: } 3331: if (&untie_user_hash($hashref)) { 3332: &Reply($client, "ok\n", $userinput); 3333: } else { 3334: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ". 3335: "while attempting rolesput\n", $userinput); 3336: } 3337: } else { 3338: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ". 3339: "while attempting rolesput\n", $userinput); 3340: } 3341: return 1; 3342: } 3343: &register_handler("rolesput", \&roles_put_handler, 1,1,0); # Encoded client only. 3344: 3345: # 3346: # Deletes (removes) a role for a user. This is equivalent to removing 3347: # a permissions package associated with the role from the user's profile. 3348: # 3349: # Parameters: 3350: # $cmd - The command (rolesdel) 3351: # $tail - The remainder of the request line. This consists 3352: # of: 3353: # The domain and user requesting the change (logged) 3354: # The domain and user being changed. 3355: # The roles being revoked. These are shipped to us 3356: # as a bunch of & separated role name keywords. 3357: # $client - The file handle open on the client. 3358: # Returns: 3359: # 1 - Continue processing 3360: # 0 - Exit. 3361: # 3362: sub roles_delete_handler { 3363: my ($cmd, $tail, $client) = @_; 3364: 3365: my $userinput = "$cmd:$tail"; 3366: 3367: my ($exedom,$exeuser,$udom,$uname,$what)=split(/:/,$tail); 3368: &Debug("cmd = ".$cmd." exedom= ".$exedom."user = ".$exeuser." udom=".$udom. 3369: "what = ".$what); 3370: my $namespace='roles'; 3371: chomp($what); 3372: my $hashref = &tie_user_hash($udom, $uname, $namespace, 3373: &GDBM_WRCREAT(), "D", 3374: "$exedom:$exeuser:$what"); 3375: 3376: if ($hashref) { 3377: my @rolekeys=split(/\&/,$what); 3378: 3379: foreach my $key (@rolekeys) { 3380: delete $hashref->{$key}; 3381: } 3382: if (&untie_user_hash($hashref)) { 3383: &Reply($client, "ok\n", $userinput); 3384: } else { 3385: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ". 3386: "while attempting rolesdel\n", $userinput); 3387: } 3388: } else { 3389: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ". 3390: "while attempting rolesdel\n", $userinput); 3391: } 3392: 3393: return 1; 3394: } 3395: &register_handler("rolesdel", \&roles_delete_handler, 1,1, 0); # Encoded client only 3396: 3397: # Unencrypted get from a user's profile database. See 3398: # GetProfileEntryEncrypted for a version that does end-to-end encryption. 3399: # This function retrieves a keyed item from a specific named database in the 3400: # user's directory. 3401: # 3402: # Parameters: 3403: # $cmd - Command request keyword (get). 3404: # $tail - Tail of the command. This is a colon separated list 3405: # consisting of the domain and username that uniquely 3406: # identifies the profile, 3407: # The 'namespace' which selects the gdbm file to 3408: # do the lookup in, 3409: # & separated list of keys to lookup. Note that 3410: # the values are returned as an & separated list too. 3411: # $client - File descriptor open on the client. 3412: # Returns: 3413: # 1 - Continue processing. 3414: # 0 - Exit. 3415: # 3416: sub get_profile_entry { 3417: my ($cmd, $tail, $client) = @_; 3418: 3419: my $userinput= "$cmd:$tail"; 3420: 3421: my ($udom,$uname,$namespace,$what) = split(/:/,$tail); 3422: chomp($what); 3423: 3424: 3425: my $replystring = read_profile($udom, $uname, $namespace, $what); 3426: my ($first) = split(/:/,$replystring); 3427: if($first ne "error") { 3428: &Reply($client, \$replystring, $userinput); 3429: } else { 3430: &Failure($client, $replystring." while attempting get\n", $userinput); 3431: } 3432: return 1; 3433: 3434: 3435: } 3436: &register_handler("get", \&get_profile_entry, 0,1,0); 3437: 3438: # 3439: # Process the encrypted get request. Note that the request is sent 3440: # in clear, but the reply is encrypted. This is a small covert channel: 3441: # information about the sensitive keys is given to the snooper. Just not 3442: # information about the values of the sensitive key. Hmm if I wanted to 3443: # know these I'd snoop for the egets. Get the profile item names from them 3444: # and then issue a get for them since there's no enforcement of the 3445: # requirement of an encrypted get for particular profile items. If I 3446: # were re-doing this, I'd force the request to be encrypted as well as the 3447: # reply. I'd also just enforce encrypted transactions for all gets since 3448: # that would prevent any covert channel snooping. 3449: # 3450: # Parameters: 3451: # $cmd - Command keyword of request (eget). 3452: # $tail - Tail of the command. See GetProfileEntry 3453: # for more information about this. 3454: # $client - File open on the client. 3455: # Returns: 3456: # 1 - Continue processing 3457: # 0 - server should exit. 3458: sub get_profile_entry_encrypted { 3459: my ($cmd, $tail, $client) = @_; 3460: 3461: my $userinput = "$cmd:$tail"; 3462: 3463: my ($udom,$uname,$namespace,$what) = split(/:/,$tail); 3464: chomp($what); 3465: my $qresult = read_profile($udom, $uname, $namespace, $what); 3466: my ($first) = split(/:/, $qresult); 3467: if($first ne "error") { 3468: 3469: if ($cipher) { 3470: my $cmdlength=length($qresult); 3471: $qresult.=" "; 3472: my $encqresult=''; 3473: for(my $encidx=0;$encidx<=$cmdlength;$encidx+=8) { 3474: $encqresult.= unpack("H16", 3475: $cipher->encrypt(substr($qresult, 3476: $encidx, 3477: 8))); 3478: } 3479: &Reply( $client, "enc:$cmdlength:$encqresult\n", $userinput); 3480: } else { 3481: &Failure( $client, "error:no_key\n", $userinput); 3482: } 3483: } else { 3484: &Failure($client, "$qresult while attempting eget\n", $userinput); 3485: 3486: } 3487: 3488: return 1; 3489: } 3490: &register_handler("eget", \&get_profile_entry_encrypted, 0, 1, 0); 3491: 3492: # 3493: # Deletes a key in a user profile database. 3494: # 3495: # Parameters: 3496: # $cmd - Command keyword (del). 3497: # $tail - Command tail. IN this case a colon 3498: # separated list containing: 3499: # The domain and user that identifies uniquely 3500: # the identity of the user. 3501: # The profile namespace (name of the profile 3502: # database file). 3503: # & separated list of keywords to delete. 3504: # $client - File open on client socket. 3505: # Returns: 3506: # 1 - Continue processing 3507: # 0 - Exit server. 3508: # 3509: # 3510: sub delete_profile_entry { 3511: my ($cmd, $tail, $client) = @_; 3512: 3513: my $userinput = "cmd:$tail"; 3514: 3515: my ($udom,$uname,$namespace,$what) = split(/:/,$tail); 3516: chomp($what); 3517: my $hashref = &tie_user_hash($udom, $uname, $namespace, 3518: &GDBM_WRCREAT(), 3519: "D",$what); 3520: if ($hashref) { 3521: my @keys=split(/\&/,$what); 3522: foreach my $key (@keys) { 3523: delete($hashref->{$key}); 3524: } 3525: if (&untie_user_hash($hashref)) { 3526: &Reply($client, "ok\n", $userinput); 3527: } else { 3528: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". 3529: "while attempting del\n", $userinput); 3530: } 3531: } else { 3532: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ". 3533: "while attempting del\n", $userinput); 3534: } 3535: return 1; 3536: } 3537: &register_handler("del", \&delete_profile_entry, 0, 1, 0); 3538: 3539: # 3540: # List the set of keys that are defined in a profile database file. 3541: # A successful reply from this will contain an & separated list of 3542: # the keys. 3543: # Parameters: 3544: # $cmd - Command request (keys). 3545: # $tail - Remainder of the request, a colon separated 3546: # list containing domain/user that identifies the 3547: # user being queried, and the database namespace 3548: # (database filename essentially). 3549: # $client - File open on the client. 3550: # Returns: 3551: # 1 - Continue processing. 3552: # 0 - Exit the server. 3553: # 3554: sub get_profile_keys { 3555: my ($cmd, $tail, $client) = @_; 3556: 3557: my $userinput = "$cmd:$tail"; 3558: 3559: my ($udom,$uname,$namespace)=split(/:/,$tail); 3560: my $qresult=''; 3561: my $hashref = &tie_user_hash($udom, $uname, $namespace, 3562: &GDBM_READER()); 3563: if ($hashref) { 3564: foreach my $key (keys %$hashref) { 3565: $qresult.="$key&"; 3566: } 3567: if (&untie_user_hash($hashref)) { 3568: $qresult=~s/\&$//; 3569: &Reply($client, \$qresult, $userinput); 3570: } else { 3571: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". 3572: "while attempting keys\n", $userinput); 3573: } 3574: } else { 3575: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ". 3576: "while attempting keys\n", $userinput); 3577: } 3578: 3579: return 1; 3580: } 3581: &register_handler("keys", \&get_profile_keys, 0, 1, 0); 3582: 3583: # 3584: # Dump the contents of a user profile database. 3585: # Note that this constitutes a very large covert channel too since 3586: # the dump will return sensitive information that is not encrypted. 3587: # The naive security assumption is that the session negotiation ensures 3588: # our client is trusted and I don't believe that's assured at present. 3589: # Sure want badly to go to ssl or tls. Of course if my peer isn't really 3590: # a LonCAPA node they could have negotiated an encryption key too so >sigh<. 3591: # 3592: # Parameters: 3593: # $cmd - The command request keyword (currentdump). 3594: # $tail - Remainder of the request, consisting of a colon 3595: # separated list that has the domain/username and 3596: # the namespace to dump (database file). 3597: # $client - file open on the remote client. 3598: # Returns: 3599: # 1 - Continue processing. 3600: # 0 - Exit the server. 3601: # 3602: sub dump_profile_database { 3603: my ($cmd, $tail, $client) = @_; 3604: 3605: my $res = LONCAPA::Lond::dump_profile_database($tail); 3606: 3607: if ($res =~ /^error:/) { 3608: Failure($client, \$res, "$cmd:$tail"); 3609: } else { 3610: Reply($client, \$res, "$cmd:$tail"); 3611: } 3612: 3613: return 1; 3614: 3615: #TODO remove 3616: my $userinput = "$cmd:$tail"; 3617: 3618: my ($udom,$uname,$namespace) = split(/:/,$tail); 3619: my $hashref = &tie_user_hash($udom, $uname, $namespace, 3620: &GDBM_READER()); 3621: if ($hashref) { 3622: # Structure of %data: 3623: # $data{$symb}->{$parameter}=$value; 3624: # $data{$symb}->{'v.'.$parameter}=$version; 3625: # since $parameter will be unescaped, we do not 3626: # have to worry about silly parameter names... 3627: 3628: my $qresult=''; 3629: my %data = (); # A hash of anonymous hashes.. 3630: while (my ($key,$value) = each(%$hashref)) { 3631: my ($v,$symb,$param) = split(/:/,$key); 3632: next if ($v eq 'version' || $symb eq 'keys'); 3633: next if (exists($data{$symb}) && 3634: exists($data{$symb}->{$param}) && 3635: $data{$symb}->{'v.'.$param} > $v); 3636: $data{$symb}->{$param}=$value; 3637: $data{$symb}->{'v.'.$param}=$v; 3638: } 3639: if (&untie_user_hash($hashref)) { 3640: while (my ($symb,$param_hash) = each(%data)) { 3641: while(my ($param,$value) = each (%$param_hash)){ 3642: next if ($param =~ /^v\./); # Ignore versions... 3643: # 3644: # Just dump the symb=value pairs separated by & 3645: # 3646: $qresult.=$symb.':'.$param.'='.$value.'&'; 3647: } 3648: } 3649: chop($qresult); 3650: &Reply($client , \$qresult, $userinput); 3651: } else { 3652: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ". 3653: "while attempting currentdump\n", $userinput); 3654: } 3655: } else { 3656: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ". 3657: "while attempting currentdump\n", $userinput); 3658: } 3659: 3660: return 1; 3661: } 3662: &register_handler("currentdump", \&dump_profile_database, 0, 1, 0); 3663: 3664: # 3665: # Dump a profile database with an optional regular expression 3666: # to match against the keys. In this dump, no effort is made 3667: # to separate symb from version information. Presumably the 3668: # databases that are dumped by this command are of a different 3669: # structure. Need to look at this and improve the documentation of 3670: # both this and the currentdump handler. 3671: # Parameters: 3672: # $cmd - The command keyword. 3673: # $tail - All of the characters after the $cmd: 3674: # These are expected to be a colon 3675: # separated list containing: 3676: # domain/user - identifying the user. 3677: # namespace - identifying the database. 3678: # regexp - optional regular expression 3679: # that is matched against 3680: # database keywords to do 3681: # selective dumps. 3682: # range - optional range of entries 3683: # e.g., 10-20 would return the 3684: # 10th to 19th items, etc. 3685: # $client - Channel open on the client. 3686: # Returns: 3687: # 1 - Continue processing. 3688: # Side effects: 3689: # response is written to $client. 3690: # 3691: sub dump_with_regexp { 3692: my ($cmd, $tail, $client) = @_; 3693: 3694: my $res = LONCAPA::Lond::dump_with_regexp($tail, $clientversion); 3695: 3696: if ($res =~ /^error:/) { 3697: Failure($client, \$res, "$cmd:$tail"); 3698: } else { 3699: Reply($client, \$res, "$cmd:$tail"); 3700: } 3701: 3702: return 1; 3703: } 3704: &register_handler("dump", \&dump_with_regexp, 0, 1, 0); 3705: 3706: # Store a set of key=value pairs associated with a versioned name. 3707: # 3708: # Parameters: 3709: # $cmd - Request command keyword. 3710: # $tail - Tail of the request. This is a colon 3711: # separated list containing: 3712: # domain/user - User and authentication domain. 3713: # namespace - Name of the database being modified 3714: # rid - Resource keyword to modify. 3715: # what - new value associated with rid. 3716: # laststore - (optional) version=timestamp 3717: # for most recent transaction for rid 3718: # in namespace, when cstore was called 3719: # 3720: # $client - Socket open on the client. 3721: # 3722: # 3723: # Returns: 3724: # 1 (keep on processing). 3725: # Side-Effects: 3726: # Writes to the client 3727: # Successful storage will cause either 'ok', or, if $laststore was included 3728: # in the tail of the request, and the version number for the last transaction 3729: # is larger than the version in $laststore, delay:$numtrans , where $numtrans 3730: # is the number of store evevnts recorded for rid in namespace since 3731: # lonnet::store() was called by the client. 3732: # 3733: sub store_handler { 3734: my ($cmd, $tail, $client) = @_; 3735: 3736: my $userinput = "$cmd:$tail"; 3737: chomp($tail); 3738: my ($udom,$uname,$namespace,$rid,$what,$laststore) =split(/:/,$tail); 3739: if ($namespace ne 'roles') { 3740: 3741: my @pairs=split(/\&/,$what); 3742: my $hashref = &tie_user_hash($udom, $uname, $namespace, 3743: &GDBM_WRCREAT(), "S", 3744: "$rid:$what"); 3745: if ($hashref) { 3746: my $now = time; 3747: my $numtrans; 3748: if ($laststore) { 3749: my ($previousversion,$previoustime) = split(/\=/,$laststore); 3750: my ($lastversion,$lasttime) = (0,0); 3751: $lastversion = $hashref->{"version:$rid"}; 3752: if ($lastversion) { 3753: $lasttime = $hashref->{"$lastversion:$rid:timestamp"}; 3754: } 3755: if (($previousversion) && ($previousversion !~ /\D/)) { 3756: if (($lastversion > $previousversion) && ($lasttime >= $previoustime)) { 3757: $numtrans = $lastversion - $previousversion; 3758: } 3759: } elsif ($lastversion) { 3760: $numtrans = $lastversion; 3761: } 3762: if ($numtrans) { 3763: $numtrans =~ s/D//g; 3764: } 3765: } 3766: $hashref->{"version:$rid"}++; 3767: my $version=$hashref->{"version:$rid"}; 3768: my $allkeys=''; 3769: foreach my $pair (@pairs) { 3770: my ($key,$value)=split(/=/,$pair); 3771: $allkeys.=$key.':'; 3772: $hashref->{"$version:$rid:$key"}=$value; 3773: } 3774: $hashref->{"$version:$rid:timestamp"}=$now; 3775: $allkeys.='timestamp'; 3776: $hashref->{"$version:keys:$rid"}=$allkeys; 3777: if (&untie_user_hash($hashref)) { 3778: my $msg = 'ok'; 3779: if ($numtrans) { 3780: $msg = 'delay:'.$numtrans; 3781: } 3782: &Reply($client, "$msg\n", $userinput); 3783: } else { 3784: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". 3785: "while attempting store\n", $userinput); 3786: } 3787: } else { 3788: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ". 3789: "while attempting store\n", $userinput); 3790: } 3791: } else { 3792: &Failure($client, "refused\n", $userinput); 3793: } 3794: 3795: return 1; 3796: } 3797: &register_handler("store", \&store_handler, 0, 1, 0); 3798: 3799: # Modify a set of key=value pairs associated with a versioned name. 3800: # 3801: # Parameters: 3802: # $cmd - Request command keyword. 3803: # $tail - Tail of the request. This is a colon 3804: # separated list containing: 3805: # domain/user - User and authentication domain. 3806: # namespace - Name of the database being modified 3807: # rid - Resource keyword to modify. 3808: # v - Version item to modify 3809: # what - new value associated with rid. 3810: # 3811: # $client - Socket open on the client. 3812: # 3813: # 3814: # Returns: 3815: # 1 (keep on processing). 3816: # Side-Effects: 3817: # Writes to the client 3818: sub putstore_handler { 3819: my ($cmd, $tail, $client) = @_; 3820: 3821: my $userinput = "$cmd:$tail"; 3822: 3823: my ($udom,$uname,$namespace,$rid,$v,$what) =split(/:/,$tail); 3824: if ($namespace ne 'roles') { 3825: 3826: chomp($what); 3827: my $hashref = &tie_user_hash($udom, $uname, $namespace, 3828: &GDBM_WRCREAT(), "M", 3829: "$rid:$v:$what"); 3830: if ($hashref) { 3831: my $now = time; 3832: my %data = &hash_extract($what); 3833: my @allkeys; 3834: while (my($key,$value) = each(%data)) { 3835: push(@allkeys,$key); 3836: $hashref->{"$v:$rid:$key"} = $value; 3837: } 3838: my $allkeys = join(':',@allkeys); 3839: $hashref->{"$v:keys:$rid"}=$allkeys; 3840: 3841: if (&untie_user_hash($hashref)) { 3842: &Reply($client, "ok\n", $userinput); 3843: } else { 3844: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". 3845: "while attempting store\n", $userinput); 3846: } 3847: } else { 3848: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ". 3849: "while attempting store\n", $userinput); 3850: } 3851: } else { 3852: &Failure($client, "refused\n", $userinput); 3853: } 3854: 3855: return 1; 3856: } 3857: &register_handler("putstore", \&putstore_handler, 0, 1, 0); 3858: 3859: sub hash_extract { 3860: my ($str)=@_; 3861: my %hash; 3862: foreach my $pair (split(/\&/,$str)) { 3863: my ($key,$value)=split(/=/,$pair); 3864: $hash{$key}=$value; 3865: } 3866: return (%hash); 3867: } 3868: sub hash_to_str { 3869: my ($hash_ref)=@_; 3870: my $str; 3871: foreach my $key (keys(%$hash_ref)) { 3872: $str.=$key.'='.$hash_ref->{$key}.'&'; 3873: } 3874: $str=~s/\&$//; 3875: return $str; 3876: } 3877: 3878: # 3879: # Dump out all versions of a resource that has key=value pairs associated 3880: # with it for each version. These resources are built up via the store 3881: # command. 3882: # 3883: # Parameters: 3884: # $cmd - Command keyword. 3885: # $tail - Remainder of the request which consists of: 3886: # domain/user - User and auth. domain. 3887: # namespace - name of resource database. 3888: # rid - Resource id. 3889: # $client - socket open on the client. 3890: # 3891: # Returns: 3892: # 1 indicating the caller should not yet exit. 3893: # Side-effects: 3894: # Writes a reply to the client. 3895: # The reply is a string of the following shape: 3896: # version=current&version:keys=k1:k2...&1:k1=v1&1:k2=v2... 3897: # Where the 1 above represents version 1. 3898: # this continues for all pairs of keys in all versions. 3899: # 3900: # 3901: # 3902: # 3903: sub restore_handler { 3904: my ($cmd, $tail, $client) = @_; 3905: 3906: my $userinput = "$cmd:$tail"; # Only used for logging purposes. 3907: my ($udom,$uname,$namespace,$rid) = split(/:/,$tail); 3908: $namespace=~s/\//\_/g; 3909: $namespace = &LONCAPA::clean_username($namespace); 3910: 3911: chomp($rid); 3912: my $qresult=''; 3913: my $hashref = &tie_user_hash($udom, $uname, $namespace, &GDBM_READER()); 3914: if ($hashref) { 3915: my $version=$hashref->{"version:$rid"}; 3916: $qresult.="version=$version&"; 3917: my $scope; 3918: for ($scope=1;$scope<=$version;$scope++) { 3919: my $vkeys=$hashref->{"$scope:keys:$rid"}; 3920: my @keys=split(/:/,$vkeys); 3921: my $key; 3922: $qresult.="$scope:keys=$vkeys&"; 3923: foreach $key (@keys) { 3924: $qresult.="$scope:$key=".$hashref->{"$scope:$rid:$key"}."&"; 3925: } 3926: } 3927: if (&untie_user_hash($hashref)) { 3928: $qresult=~s/\&$//; 3929: &Reply( $client, \$qresult, $userinput); 3930: } else { 3931: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". 3932: "while attempting restore\n", $userinput); 3933: } 3934: } else { 3935: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ". 3936: "while attempting restore\n", $userinput); 3937: } 3938: 3939: return 1; 3940: 3941: 3942: } 3943: &register_handler("restore", \&restore_handler, 0,1,0); 3944: 3945: # 3946: # Add a chat message to a synchronous discussion board. 3947: # 3948: # Parameters: 3949: # $cmd - Request keyword. 3950: # $tail - Tail of the command. A colon separated list 3951: # containing: 3952: # cdom - Domain on which the chat board lives 3953: # cnum - Course containing the chat board. 3954: # newpost - Body of the posting. 3955: # group - Optional group, if chat board is only 3956: # accessible in a group within the course 3957: # $client - Socket open on the client. 3958: # Returns: 3959: # 1 - Indicating caller should keep on processing. 3960: # 3961: # Side-effects: 3962: # writes a reply to the client. 3963: # 3964: # 3965: sub send_chat_handler { 3966: my ($cmd, $tail, $client) = @_; 3967: 3968: 3969: my $userinput = "$cmd:$tail"; 3970: 3971: my ($cdom,$cnum,$newpost,$group)=split(/\:/,$tail); 3972: &chat_add($cdom,$cnum,$newpost,$group); 3973: &Reply($client, "ok\n", $userinput); 3974: 3975: return 1; 3976: } 3977: &register_handler("chatsend", \&send_chat_handler, 0, 1, 0); 3978: 3979: # 3980: # Retrieve the set of chat messages from a discussion board. 3981: # 3982: # Parameters: 3983: # $cmd - Command keyword that initiated the request. 3984: # $tail - Remainder of the request after the command 3985: # keyword. In this case a colon separated list of 3986: # chat domain - Which discussion board. 3987: # chat id - Discussion thread(?) 3988: # domain/user - Authentication domain and username 3989: # of the requesting person. 3990: # group - Optional course group containing 3991: # the board. 3992: # $client - Socket open on the client program. 3993: # Returns: 3994: # 1 - continue processing 3995: # Side effects: 3996: # Response is written to the client. 3997: # 3998: sub retrieve_chat_handler { 3999: my ($cmd, $tail, $client) = @_; 4000: 4001: 4002: my $userinput = "$cmd:$tail"; 4003: 4004: my ($cdom,$cnum,$udom,$uname,$group)=split(/\:/,$tail); 4005: my $reply=''; 4006: foreach (&get_chat($cdom,$cnum,$udom,$uname,$group)) { 4007: $reply.=&escape($_).':'; 4008: } 4009: $reply=~s/\:$//; 4010: &Reply($client, \$reply, $userinput); 4011: 4012: 4013: return 1; 4014: } 4015: &register_handler("chatretr", \&retrieve_chat_handler, 0, 1, 0); 4016: 4017: # 4018: # Initiate a query of an sql database. SQL query repsonses get put in 4019: # a file for later retrieval. This prevents sql query results from 4020: # bottlenecking the system. Note that with loncnew, perhaps this is 4021: # less of an issue since multiple outstanding requests can be concurrently 4022: # serviced. 4023: # 4024: # Parameters: 4025: # $cmd - Command keyword that initiated the request. 4026: # $tail - Remainder of the command after the keyword. 4027: # For this function, this consists of a query and 4028: # 3 arguments that are self-documentingly labelled 4029: # in the original arg1, arg2, arg3. 4030: # $client - Socket open on the client. 4031: # Return: 4032: # 1 - Indicating processing should continue. 4033: # Side-effects: 4034: # a reply is written to $client. 4035: # 4036: sub send_query_handler { 4037: my ($cmd, $tail, $client) = @_; 4038: 4039: my $userinput = "$cmd:$tail"; 4040: 4041: my ($query,$arg1,$arg2,$arg3)=split(/\:/,$tail); 4042: $query=~s/\n*$//g; 4043: if (($query eq 'usersearch') || ($query eq 'instdirsearch')) { 4044: my $usersearchconf = &get_usersearch_config($currentdomainid,'directorysrch'); 4045: my $earlyout; 4046: if (ref($usersearchconf) eq 'HASH') { 4047: if ($currentdomainid eq $clienthomedom) { 4048: if ($query eq 'usersearch') { 4049: if ($usersearchconf->{'lcavailable'} eq '0') { 4050: $earlyout = 1; 4051: } 4052: } else { 4053: if ($usersearchconf->{'available'} eq '0') { 4054: $earlyout = 1; 4055: } 4056: } 4057: } else { 4058: if ($query eq 'usersearch') { 4059: if ($usersearchconf->{'lclocalonly'}) { 4060: $earlyout = 1; 4061: } 4062: } else { 4063: if ($usersearchconf->{'localonly'}) { 4064: $earlyout = 1; 4065: } 4066: } 4067: } 4068: } 4069: if ($earlyout) { 4070: &Reply($client, "query_not_authorized\n"); 4071: return 1; 4072: } 4073: } 4074: &Reply($client, "". &sql_reply("$clientname\&$query". 4075: "\&$arg1"."\&$arg2"."\&$arg3")."\n", 4076: $userinput); 4077: 4078: return 1; 4079: } 4080: &register_handler("querysend", \&send_query_handler, 0, 1, 0); 4081: 4082: # 4083: # Add a reply to an sql query. SQL queries are done asyncrhonously. 4084: # The query is submitted via a "querysend" transaction. 4085: # There it is passed on to the lonsql daemon, queued and issued to 4086: # mysql. 4087: # This transaction is invoked when the sql transaction is complete 4088: # it stores the query results in flie and indicates query completion. 4089: # presumably local software then fetches this response... I'm guessing 4090: # the sequence is: lonc does a querysend, we ask lonsql to do it. 4091: # lonsql on completion of the query interacts with the lond of our 4092: # client to do a query reply storing two files: 4093: # - id - The results of the query. 4094: # - id.end - Indicating the transaction completed. 4095: # NOTE: id is a unique id assigned to the query and querysend time. 4096: # Parameters: 4097: # $cmd - Command keyword that initiated this request. 4098: # $tail - Remainder of the tail. In this case that's a colon 4099: # separated list containing the query Id and the 4100: # results of the query. 4101: # $client - Socket open on the client. 4102: # Return: 4103: # 1 - Indicating that we should continue processing. 4104: # Side effects: 4105: # ok written to the client. 4106: # 4107: sub reply_query_handler { 4108: my ($cmd, $tail, $client) = @_; 4109: 4110: 4111: my $userinput = "$cmd:$tail"; 4112: 4113: my ($id,$reply)=split(/:/,$tail); 4114: my $store; 4115: my $execdir=$perlvar{'lonDaemons'}; 4116: if ($store=IO::File->new(">$execdir/tmp/$id")) { 4117: $reply=~s/\&/\n/g; 4118: print $store $reply; 4119: close $store; 4120: my $store2=IO::File->new(">$execdir/tmp/$id.end"); 4121: print $store2 "done\n"; 4122: close $store2; 4123: &Reply($client, "ok\n", $userinput); 4124: } else { 4125: &Failure($client, "error: ".($!+0) 4126: ." IO::File->new Failed ". 4127: "while attempting queryreply\n", $userinput); 4128: } 4129: 4130: 4131: return 1; 4132: } 4133: &register_handler("queryreply", \&reply_query_handler, 0, 1, 0); 4134: 4135: # 4136: # Process the courseidput request. Not quite sure what this means 4137: # at the system level sense. It appears a gdbm file in the 4138: # /home/httpd/lonUsers/$domain/nohist_courseids is tied and 4139: # a set of entries made in that database. 4140: # 4141: # Parameters: 4142: # $cmd - The command keyword that initiated this request. 4143: # $tail - Tail of the command. In this case consists of a colon 4144: # separated list contaning the domain to apply this to and 4145: # an ampersand separated list of keyword=value pairs. 4146: # Each value is a colon separated list that includes: 4147: # description, institutional code and course owner. 4148: # For backward compatibility with versions included 4149: # in LON-CAPA 1.1.X (and earlier) and 1.2.X, institutional 4150: # code and/or course owner are preserved from the existing 4151: # record when writing a new record in response to 1.1 or 4152: # 1.2 implementations of lonnet::flushcourselogs(). 4153: # 4154: # $client - Socket open on the client. 4155: # Returns: 4156: # 1 - indicating that processing should continue 4157: # 4158: # Side effects: 4159: # reply is written to the client. 4160: # 4161: sub put_course_id_handler { 4162: my ($cmd, $tail, $client) = @_; 4163: 4164: 4165: my $userinput = "$cmd:$tail"; 4166: 4167: my ($udom, $what) = split(/:/, $tail,2); 4168: chomp($what); 4169: my $now=time; 4170: my @pairs=split(/\&/,$what); 4171: 4172: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT()); 4173: if ($hashref) { 4174: foreach my $pair (@pairs) { 4175: my ($key,$courseinfo) = split(/=/,$pair,2); 4176: $courseinfo =~ s/=/:/g; 4177: if (defined($hashref->{$key})) { 4178: my $value = &Apache::lonnet::thaw_unescape($hashref->{$key}); 4179: if (ref($value) eq 'HASH') { 4180: my @items = ('description','inst_code','owner','type'); 4181: my @new_items = split(/:/,$courseinfo,-1); 4182: my %storehash; 4183: for (my $i=0; $i<@new_items; $i++) { 4184: $storehash{$items[$i]} = &unescape($new_items[$i]); 4185: } 4186: $hashref->{$key} = 4187: &Apache::lonnet::freeze_escape(\%storehash); 4188: my $unesc_key = &unescape($key); 4189: $hashref->{&escape('lasttime:'.$unesc_key)} = $now; 4190: next; 4191: } 4192: } 4193: my @current_items = split(/:/,$hashref->{$key},-1); 4194: shift(@current_items); # remove description 4195: pop(@current_items); # remove last access 4196: my $numcurrent = scalar(@current_items); 4197: if ($numcurrent > 3) { 4198: $numcurrent = 3; 4199: } 4200: my @new_items = split(/:/,$courseinfo,-1); 4201: my $numnew = scalar(@new_items); 4202: if ($numcurrent > 0) { 4203: if ($numnew <= $numcurrent) { # flushcourselogs() from pre 2.2 4204: for (my $j=$numcurrent-$numnew; $j>=0; $j--) { 4205: $courseinfo .= ':'.$current_items[$numcurrent-$j-1]; 4206: } 4207: } 4208: } 4209: $hashref->{$key}=$courseinfo.':'.$now; 4210: } 4211: if (&untie_domain_hash($hashref)) { 4212: &Reply( $client, "ok\n", $userinput); 4213: } else { 4214: &Failure($client, "error: ".($!+0) 4215: ." untie(GDBM) Failed ". 4216: "while attempting courseidput\n", $userinput); 4217: } 4218: } else { 4219: &Failure($client, "error: ".($!+0) 4220: ." tie(GDBM) Failed ". 4221: "while attempting courseidput\n", $userinput); 4222: } 4223: 4224: return 1; 4225: } 4226: &register_handler("courseidput", \&put_course_id_handler, 0, 1, 0); 4227: 4228: sub put_course_id_hash_handler { 4229: my ($cmd, $tail, $client) = @_; 4230: my $userinput = "$cmd:$tail"; 4231: my ($udom,$mode,$what) = split(/:/, $tail,3); 4232: chomp($what); 4233: my $now=time; 4234: my @pairs=split(/\&/,$what); 4235: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT()); 4236: if ($hashref) { 4237: foreach my $pair (@pairs) { 4238: my ($key,$value)=split(/=/,$pair); 4239: my $unesc_key = &unescape($key); 4240: if ($mode ne 'timeonly') { 4241: if (!defined($hashref->{&escape('lasttime:'.$unesc_key)})) { 4242: my $curritems = &Apache::lonnet::thaw_unescape($key); 4243: if (ref($curritems) ne 'HASH') { 4244: my @current_items = split(/:/,$hashref->{$key},-1); 4245: my $lasttime = pop(@current_items); 4246: $hashref->{&escape('lasttime:'.$unesc_key)} = $lasttime; 4247: } else { 4248: $hashref->{&escape('lasttime:'.$unesc_key)} = ''; 4249: } 4250: } 4251: $hashref->{$key} = $value; 4252: } 4253: if ($mode ne 'notime') { 4254: $hashref->{&escape('lasttime:'.$unesc_key)} = $now; 4255: } 4256: } 4257: if (&untie_domain_hash($hashref)) { 4258: &Reply($client, "ok\n", $userinput); 4259: } else { 4260: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". 4261: "while attempting courseidputhash\n", $userinput); 4262: } 4263: } else { 4264: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ". 4265: "while attempting courseidputhash\n", $userinput); 4266: } 4267: return 1; 4268: } 4269: &register_handler("courseidputhash", \&put_course_id_hash_handler, 0, 1, 0); 4270: 4271: # Retrieves the value of a course id resource keyword pattern 4272: # defined since a starting date. Both the starting date and the 4273: # keyword pattern are optional. If the starting date is not supplied it 4274: # is treated as the beginning of time. If the pattern is not found, 4275: # it is treatred as "." matching everything. 4276: # 4277: # Parameters: 4278: # $cmd - Command keyword that resulted in us being dispatched. 4279: # $tail - The remainder of the command that, in this case, consists 4280: # of a colon separated list of: 4281: # domain - The domain in which the course database is 4282: # defined. 4283: # since - Optional parameter describing the minimum 4284: # time of definition(?) of the resources that 4285: # will match the dump. 4286: # description - regular expression that is used to filter 4287: # the dump. Only keywords matching this regexp 4288: # will be used. 4289: # institutional code - optional supplied code to filter 4290: # the dump. Only courses with an institutional code 4291: # that match the supplied code will be returned. 4292: # owner - optional supplied username and domain of owner to 4293: # filter the dump. Only courses for which the course 4294: # owner matches the supplied username and/or domain 4295: # will be returned. Pre-2.2.0 legacy entries from 4296: # nohist_courseiddump will only contain usernames. 4297: # type - optional parameter for selection 4298: # regexp_ok - if 1 or -1 allow the supplied institutional code 4299: # filter to behave as a regular expression: 4300: # 1 will not exclude the course if the instcode matches the RE 4301: # -1 will exclude the course if the instcode matches the RE 4302: # rtn_as_hash - whether to return the information available for 4303: # each matched item as a frozen hash of all 4304: # key, value pairs in the item's hash, or as a 4305: # colon-separated list of (in order) description, 4306: # institutional code, and course owner. 4307: # selfenrollonly - filter by courses allowing self-enrollment 4308: # now or in the future (selfenrollonly = 1). 4309: # catfilter - filter by course category, assigned to a course 4310: # using manually defined categories (i.e., not 4311: # self-cataloging based on on institutional code). 4312: # showhidden - include course in results even if course 4313: # was set to be excluded from course catalog (DC only). 4314: # caller - if set to 'coursecatalog', courses set to be hidden 4315: # from course catalog will be excluded from results (unless 4316: # overridden by "showhidden". 4317: # cloner - escaped username:domain of course cloner (if picking course to 4318: # clone). 4319: # cc_clone_list - escaped comma separated list of courses for which 4320: # course cloner has active CC role (and so can clone 4321: # automatically). 4322: # cloneonly - filter by courses for which cloner has rights to clone. 4323: # createdbefore - include courses for which creation date preceeded this date. 4324: # createdafter - include courses for which creation date followed this date. 4325: # creationcontext - include courses created in specified context 4326: # 4327: # domcloner - flag to indicate if user can create CCs in course's domain. 4328: # If so, ability to clone course is automatic. 4329: # hasuniquecode - filter by courses for which a six character unique code has 4330: # been set. 4331: # 4332: # $client - The socket open on the client. 4333: # Returns: 4334: # 1 - Continue processing. 4335: # Side Effects: 4336: # a reply is written to $client. 4337: sub dump_course_id_handler { 4338: my ($cmd, $tail, $client) = @_; 4339: 4340: my $res = LONCAPA::Lond::dump_course_id_handler($tail); 4341: if ($res =~ /^error:/) { 4342: Failure($client, \$res, "$cmd:$tail"); 4343: } else { 4344: Reply($client, \$res, "$cmd:$tail"); 4345: } 4346: 4347: return 1; 4348: 4349: #TODO remove 4350: my $userinput = "$cmd:$tail"; 4351: 4352: my ($udom,$since,$description,$instcodefilter,$ownerfilter,$coursefilter, 4353: $typefilter,$regexp_ok,$rtn_as_hash,$selfenrollonly,$catfilter,$showhidden, 4354: $caller,$cloner,$cc_clone_list,$cloneonly,$createdbefore,$createdafter, 4355: $creationcontext,$domcloner,$hasuniquecode) =split(/:/,$tail); 4356: my $now = time; 4357: my ($cloneruname,$clonerudom,%cc_clone); 4358: if (defined($description)) { 4359: $description=&unescape($description); 4360: } else { 4361: $description='.'; 4362: } 4363: if (defined($instcodefilter)) { 4364: $instcodefilter=&unescape($instcodefilter); 4365: } else { 4366: $instcodefilter='.'; 4367: } 4368: my ($ownerunamefilter,$ownerdomfilter); 4369: if (defined($ownerfilter)) { 4370: $ownerfilter=&unescape($ownerfilter); 4371: if ($ownerfilter ne '.' && defined($ownerfilter)) { 4372: if ($ownerfilter =~ /^([^:]*):([^:]*)$/) { 4373: $ownerunamefilter = $1; 4374: $ownerdomfilter = $2; 4375: } else { 4376: $ownerunamefilter = $ownerfilter; 4377: $ownerdomfilter = ''; 4378: } 4379: } 4380: } else { 4381: $ownerfilter='.'; 4382: } 4383: 4384: if (defined($coursefilter)) { 4385: $coursefilter=&unescape($coursefilter); 4386: } else { 4387: $coursefilter='.'; 4388: } 4389: if (defined($typefilter)) { 4390: $typefilter=&unescape($typefilter); 4391: } else { 4392: $typefilter='.'; 4393: } 4394: if (defined($regexp_ok)) { 4395: $regexp_ok=&unescape($regexp_ok); 4396: } 4397: if (defined($catfilter)) { 4398: $catfilter=&unescape($catfilter); 4399: } 4400: if (defined($cloner)) { 4401: $cloner = &unescape($cloner); 4402: ($cloneruname,$clonerudom) = ($cloner =~ /^($LONCAPA::match_username):($LONCAPA::match_domain)$/); 4403: } 4404: if (defined($cc_clone_list)) { 4405: $cc_clone_list = &unescape($cc_clone_list); 4406: my @cc_cloners = split('&',$cc_clone_list); 4407: foreach my $cid (@cc_cloners) { 4408: my ($clonedom,$clonenum) = split(':',$cid); 4409: next if ($clonedom ne $udom); 4410: $cc_clone{$clonedom.'_'.$clonenum} = 1; 4411: } 4412: } 4413: if ($createdbefore ne '') { 4414: $createdbefore = &unescape($createdbefore); 4415: } else { 4416: $createdbefore = 0; 4417: } 4418: if ($createdafter ne '') { 4419: $createdafter = &unescape($createdafter); 4420: } else { 4421: $createdafter = 0; 4422: } 4423: if ($creationcontext ne '') { 4424: $creationcontext = &unescape($creationcontext); 4425: } else { 4426: $creationcontext = '.'; 4427: } 4428: unless ($hasuniquecode) { 4429: $hasuniquecode = '.'; 4430: } 4431: my $unpack = 1; 4432: if ($description eq '.' && $instcodefilter eq '.' && $ownerfilter eq '.' && 4433: $typefilter eq '.') { 4434: $unpack = 0; 4435: } 4436: if (!defined($since)) { $since=0; } 4437: my $qresult=''; 4438: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT()); 4439: if ($hashref) { 4440: while (my ($key,$value) = each(%$hashref)) { 4441: my ($unesc_key,$lasttime_key,$lasttime,$is_hash,%val, 4442: %unesc_val,$selfenroll_end,$selfenroll_types,$created, 4443: $context); 4444: $unesc_key = &unescape($key); 4445: if ($unesc_key =~ /^lasttime:/) { 4446: next; 4447: } else { 4448: $lasttime_key = &escape('lasttime:'.$unesc_key); 4449: } 4450: if ($hashref->{$lasttime_key} ne '') { 4451: $lasttime = $hashref->{$lasttime_key}; 4452: next if ($lasttime<$since); 4453: } 4454: my ($canclone,$valchange); 4455: my $items = &Apache::lonnet::thaw_unescape($value); 4456: if (ref($items) eq 'HASH') { 4457: if ($hashref->{$lasttime_key} eq '') { 4458: next if ($since > 1); 4459: } 4460: $is_hash = 1; 4461: if ($domcloner) { 4462: $canclone = 1; 4463: } elsif (defined($clonerudom)) { 4464: if ($items->{'cloners'}) { 4465: my @cloneable = split(',',$items->{'cloners'}); 4466: if (@cloneable) { 4467: if (grep(/^\*$/,@cloneable)) { 4468: $canclone = 1; 4469: } elsif (grep(/^\*:\Q$clonerudom\E$/,@cloneable)) { 4470: $canclone = 1; 4471: } elsif (grep(/^\Q$cloneruname\E:\Q$clonerudom\E$/,@cloneable)) { 4472: $canclone = 1; 4473: } 4474: } 4475: unless ($canclone) { 4476: if ($cloneruname ne '' && $clonerudom ne '') { 4477: if ($cc_clone{$unesc_key}) { 4478: $canclone = 1; 4479: $items->{'cloners'} .= ','.$cloneruname.':'. 4480: $clonerudom; 4481: $valchange = 1; 4482: } 4483: } 4484: } 4485: } elsif (defined($cloneruname)) { 4486: if ($cc_clone{$unesc_key}) { 4487: $canclone = 1; 4488: $items->{'cloners'} = $cloneruname.':'.$clonerudom; 4489: $valchange = 1; 4490: } 4491: unless ($canclone) { 4492: if ($items->{'owner'} =~ /:/) { 4493: if ($items->{'owner'} eq $cloner) { 4494: $canclone = 1; 4495: } 4496: } elsif ($cloner eq $items->{'owner'}.':'.$udom) { 4497: $canclone = 1; 4498: } 4499: if ($canclone) { 4500: $items->{'cloners'} = $cloneruname.':'.$clonerudom; 4501: $valchange = 1; 4502: } 4503: } 4504: } 4505: } 4506: if ($unpack || !$rtn_as_hash) { 4507: $unesc_val{'descr'} = $items->{'description'}; 4508: $unesc_val{'inst_code'} = $items->{'inst_code'}; 4509: $unesc_val{'owner'} = $items->{'owner'}; 4510: $unesc_val{'type'} = $items->{'type'}; 4511: $unesc_val{'cloners'} = $items->{'cloners'}; 4512: $unesc_val{'created'} = $items->{'created'}; 4513: $unesc_val{'context'} = $items->{'context'}; 4514: } 4515: $selfenroll_types = $items->{'selfenroll_types'}; 4516: $selfenroll_end = $items->{'selfenroll_end_date'}; 4517: $created = $items->{'created'}; 4518: $context = $items->{'context'}; 4519: if ($hasuniquecode ne '.') { 4520: next unless ($items->{'uniquecode'}); 4521: } 4522: if ($selfenrollonly) { 4523: next if (!$selfenroll_types); 4524: if (($selfenroll_end > 0) && ($selfenroll_end <= $now)) { 4525: next; 4526: } 4527: } 4528: if ($creationcontext ne '.') { 4529: next if (($context ne '') && ($context ne $creationcontext)); 4530: } 4531: if ($createdbefore > 0) { 4532: next if (($created eq '') || ($created > $createdbefore)); 4533: } 4534: if ($createdafter > 0) { 4535: next if (($created eq '') || ($created <= $createdafter)); 4536: } 4537: if ($catfilter ne '') { 4538: next if ($items->{'categories'} eq ''); 4539: my @categories = split('&',$items->{'categories'}); 4540: next if (@categories == 0); 4541: my @subcats = split('&',$catfilter); 4542: my $matchcat = 0; 4543: foreach my $cat (@categories) { 4544: if (grep(/^\Q$cat\E$/,@subcats)) { 4545: $matchcat = 1; 4546: last; 4547: } 4548: } 4549: next if (!$matchcat); 4550: } 4551: if ($caller eq 'coursecatalog') { 4552: if ($items->{'hidefromcat'} eq 'yes') { 4553: next if !$showhidden; 4554: } 4555: } 4556: } else { 4557: next if ($catfilter ne ''); 4558: next if ($selfenrollonly); 4559: next if ($createdbefore || $createdafter); 4560: next if ($creationcontext ne '.'); 4561: if ((defined($clonerudom)) && (defined($cloneruname))) { 4562: if ($cc_clone{$unesc_key}) { 4563: $canclone = 1; 4564: $val{'cloners'} = &escape($cloneruname.':'.$clonerudom); 4565: } 4566: } 4567: $is_hash = 0; 4568: my @courseitems = split(/:/,$value); 4569: $lasttime = pop(@courseitems); 4570: if ($hashref->{$lasttime_key} eq '') { 4571: next if ($lasttime<$since); 4572: } 4573: ($val{'descr'},$val{'inst_code'},$val{'owner'},$val{'type'}) = @courseitems; 4574: } 4575: if ($cloneonly) { 4576: next unless ($canclone); 4577: } 4578: my $match = 1; 4579: if ($description ne '.') { 4580: if (!$is_hash) { 4581: $unesc_val{'descr'} = &unescape($val{'descr'}); 4582: } 4583: if (eval{$unesc_val{'descr'} !~ /\Q$description\E/i}) { 4584: $match = 0; 4585: } 4586: } 4587: if ($instcodefilter ne '.') { 4588: if (!$is_hash) { 4589: $unesc_val{'inst_code'} = &unescape($val{'inst_code'}); 4590: } 4591: if ($regexp_ok == 1) { 4592: if (eval{$unesc_val{'inst_code'} !~ /$instcodefilter/}) { 4593: $match = 0; 4594: } 4595: } elsif ($regexp_ok == -1) { 4596: if (eval{$unesc_val{'inst_code'} =~ /$instcodefilter/}) { 4597: $match = 0; 4598: } 4599: } else { 4600: if (eval{$unesc_val{'inst_code'} !~ /\Q$instcodefilter\E/i}) { 4601: $match = 0; 4602: } 4603: } 4604: } 4605: if ($ownerfilter ne '.') { 4606: if (!$is_hash) { 4607: $unesc_val{'owner'} = &unescape($val{'owner'}); 4608: } 4609: if (($ownerunamefilter ne '') && ($ownerdomfilter ne '')) { 4610: if ($unesc_val{'owner'} =~ /:/) { 4611: if (eval{$unesc_val{'owner'} !~ 4612: /\Q$ownerunamefilter\E:\Q$ownerdomfilter\E$/i}) { 4613: $match = 0; 4614: } 4615: } else { 4616: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E/i}) { 4617: $match = 0; 4618: } 4619: } 4620: } elsif ($ownerunamefilter ne '') { 4621: if ($unesc_val{'owner'} =~ /:/) { 4622: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E:[^:]+$/i}) { 4623: $match = 0; 4624: } 4625: } else { 4626: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E/i}) { 4627: $match = 0; 4628: } 4629: } 4630: } elsif ($ownerdomfilter ne '') { 4631: if ($unesc_val{'owner'} =~ /:/) { 4632: if (eval{$unesc_val{'owner'} !~ /^[^:]+:\Q$ownerdomfilter\E/}) { 4633: $match = 0; 4634: } 4635: } else { 4636: if ($ownerdomfilter ne $udom) { 4637: $match = 0; 4638: } 4639: } 4640: } 4641: } 4642: if ($coursefilter ne '.') { 4643: if (eval{$unesc_key !~ /^$udom(_)\Q$coursefilter\E$/}) { 4644: $match = 0; 4645: } 4646: } 4647: if ($typefilter ne '.') { 4648: if (!$is_hash) { 4649: $unesc_val{'type'} = &unescape($val{'type'}); 4650: } 4651: if ($unesc_val{'type'} eq '') { 4652: if ($typefilter ne 'Course') { 4653: $match = 0; 4654: } 4655: } else { 4656: if (eval{$unesc_val{'type'} !~ /^\Q$typefilter\E$/}) { 4657: $match = 0; 4658: } 4659: } 4660: } 4661: if ($match == 1) { 4662: if ($rtn_as_hash) { 4663: if ($is_hash) { 4664: if ($valchange) { 4665: my $newvalue = &Apache::lonnet::freeze_escape($items); 4666: $qresult.=$key.'='.$newvalue.'&'; 4667: } else { 4668: $qresult.=$key.'='.$value.'&'; 4669: } 4670: } else { 4671: my %rtnhash = ( 'description' => &unescape($val{'descr'}), 4672: 'inst_code' => &unescape($val{'inst_code'}), 4673: 'owner' => &unescape($val{'owner'}), 4674: 'type' => &unescape($val{'type'}), 4675: 'cloners' => &unescape($val{'cloners'}), 4676: ); 4677: my $items = &Apache::lonnet::freeze_escape(\%rtnhash); 4678: $qresult.=$key.'='.$items.'&'; 4679: } 4680: } else { 4681: if ($is_hash) { 4682: $qresult .= $key.'='.&escape($unesc_val{'descr'}).':'. 4683: &escape($unesc_val{'inst_code'}).':'. 4684: &escape($unesc_val{'owner'}).'&'; 4685: } else { 4686: $qresult .= $key.'='.$val{'descr'}.':'.$val{'inst_code'}. 4687: ':'.$val{'owner'}.'&'; 4688: } 4689: } 4690: } 4691: } 4692: if (&untie_domain_hash($hashref)) { 4693: chop($qresult); 4694: &Reply($client, \$qresult, $userinput); 4695: } else { 4696: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". 4697: "while attempting courseiddump\n", $userinput); 4698: } 4699: } else { 4700: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ". 4701: "while attempting courseiddump\n", $userinput); 4702: } 4703: return 1; 4704: } 4705: &register_handler("courseiddump", \&dump_course_id_handler, 0, 1, 0); 4706: 4707: sub course_lastaccess_handler { 4708: my ($cmd, $tail, $client) = @_; 4709: my $userinput = "$cmd:$tail"; 4710: my ($cdom,$cnum) = split(':',$tail); 4711: my (%lastaccess,$qresult); 4712: my $hashref = &tie_domain_hash($cdom, "nohist_courseids", &GDBM_WRCREAT()); 4713: if ($hashref) { 4714: while (my ($key,$value) = each(%$hashref)) { 4715: my ($unesc_key,$lasttime); 4716: $unesc_key = &unescape($key); 4717: if ($cnum) { 4718: next unless ($unesc_key =~ /\Q$cdom\E_\Q$cnum\E$/); 4719: } 4720: if ($unesc_key =~ /^lasttime:($LONCAPA::match_domain\_$LONCAPA::match_courseid)/) { 4721: $lastaccess{$1} = $value; 4722: } else { 4723: my $items = &Apache::lonnet::thaw_unescape($value); 4724: if (ref($items) eq 'HASH') { 4725: unless ($lastaccess{$unesc_key}) { 4726: $lastaccess{$unesc_key} = ''; 4727: } 4728: } else { 4729: my @courseitems = split(':',$value); 4730: $lastaccess{$unesc_key} = pop(@courseitems); 4731: } 4732: } 4733: } 4734: foreach my $cid (sort(keys(%lastaccess))) { 4735: $qresult.=&escape($cid).'='.$lastaccess{$cid}.'&'; 4736: } 4737: if (&untie_domain_hash($hashref)) { 4738: if ($qresult) { 4739: chop($qresult); 4740: } 4741: &Reply($client, \$qresult, $userinput); 4742: } else { 4743: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". 4744: "while attempting lastacourseaccess\n", $userinput); 4745: } 4746: } else { 4747: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ". 4748: "while attempting lastcourseaccess\n", $userinput); 4749: } 4750: return 1; 4751: } 4752: &register_handler("courselastaccess",\&course_lastaccess_handler, 0, 1, 0); 4753: 4754: # 4755: # Puts an unencrypted entry in a namespace db file at the domain level 4756: # 4757: # Parameters: 4758: # $cmd - The command that got us here. 4759: # $tail - Tail of the command (remaining parameters). 4760: # $client - File descriptor connected to client. 4761: # Returns 4762: # 0 - Requested to exit, caller should shut down. 4763: # 1 - Continue processing. 4764: # Side effects: 4765: # reply is written to $client. 4766: # 4767: sub put_domain_handler { 4768: my ($cmd,$tail,$client) = @_; 4769: 4770: my $userinput = "$cmd:$tail"; 4771: 4772: my ($udom,$namespace,$what) =split(/:/,$tail,3); 4773: chomp($what); 4774: my @pairs=split(/\&/,$what); 4775: my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_WRCREAT(), 4776: "P", $what); 4777: if ($hashref) { 4778: foreach my $pair (@pairs) { 4779: my ($key,$value)=split(/=/,$pair); 4780: $hashref->{$key}=$value; 4781: } 4782: if (&untie_domain_hash($hashref)) { 4783: &Reply($client, "ok\n", $userinput); 4784: } else { 4785: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". 4786: "while attempting putdom\n", $userinput); 4787: } 4788: } else { 4789: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ". 4790: "while attempting putdom\n", $userinput); 4791: } 4792: 4793: return 1; 4794: } 4795: &register_handler("putdom", \&put_domain_handler, 0, 1, 0); 4796: 4797: # Updates one or more entries in clickers.db file at the domain level 4798: # 4799: # Parameters: 4800: # $cmd - The command that got us here. 4801: # $tail - Tail of the command (remaining parameters). 4802: # In this case a colon separated list containing: 4803: # (a) the domain for which we are updating the entries, 4804: # (b) the action required -- add or del -- and 4805: # (c) a &-separated list of entries to add or delete. 4806: # $client - File descriptor connected to client. 4807: # Returns 4808: # 1 - Continue processing. 4809: # 0 - Requested to exit, caller should shut down. 4810: # Side effects: 4811: # reply is written to $client. 4812: # 4813: 4814: 4815: sub update_clickers { 4816: my ($cmd, $tail, $client) = @_; 4817: 4818: my $userinput = "$cmd:$tail"; 4819: my ($udom,$action,$what) =split(/:/,$tail,3); 4820: chomp($what); 4821: 4822: my $hashref = &tie_domain_hash($udom, "clickers", &GDBM_WRCREAT(), 4823: "U","$action:$what"); 4824: 4825: if (!$hashref) { 4826: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ". 4827: "while attempting updateclickers\n", $userinput); 4828: return 1; 4829: } 4830: 4831: my @pairs=split(/\&/,$what); 4832: foreach my $pair (@pairs) { 4833: my ($key,$value)=split(/=/,$pair); 4834: if ($action eq 'add') { 4835: if (exists($hashref->{$key})) { 4836: my @newvals = split(/,/,&unescape($value)); 4837: my @currvals = split(/,/,&unescape($hashref->{$key})); 4838: my @merged = sort(keys(%{{map { $_ => 1 } (@newvals,@currvals)}})); 4839: $hashref->{$key}=&escape(join(',',@merged)); 4840: } else { 4841: $hashref->{$key}=$value; 4842: } 4843: } elsif ($action eq 'del') { 4844: if (exists($hashref->{$key})) { 4845: my %current; 4846: map { $current{$_} = 1; } split(/,/,&unescape($hashref->{$key})); 4847: map { delete($current{$_}); } split(/,/,&unescape($value)); 4848: if (keys(%current)) { 4849: $hashref->{$key}=&escape(join(',',sort(keys(%current)))); 4850: } else { 4851: delete($hashref->{$key}); 4852: } 4853: } 4854: } 4855: } 4856: if (&untie_user_hash($hashref)) { 4857: &Reply( $client, "ok\n", $userinput); 4858: } else { 4859: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ". 4860: "while attempting put\n", 4861: $userinput); 4862: } 4863: return 1; 4864: } 4865: &register_handler("updateclickers", \&update_clickers, 0, 1, 0); 4866: 4867: 4868: # Deletes one or more entries in a namespace db file at the domain level 4869: # 4870: # Parameters: 4871: # $cmd - The command that got us here. 4872: # $tail - Tail of the command (remaining parameters). 4873: # In this case a colon separated list containing: 4874: # (a) the domain for which we are deleting the entries, 4875: # (b) &-separated list of keys to delete. 4876: # $client - File descriptor connected to client. 4877: # Returns 4878: # 1 - Continue processing. 4879: # 0 - Requested to exit, caller should shut down. 4880: # Side effects: 4881: # reply is written to $client. 4882: # 4883: 4884: sub del_domain_handler { 4885: my ($cmd,$tail,$client) = @_; 4886: 4887: my $userinput = "$cmd:$tail"; 4888: 4889: my ($udom,$namespace,$what)=split(/:/,$tail,3); 4890: chomp($what); 4891: my $hashref = &tie_domain_hash($udom,$namespace,&GDBM_WRCREAT(), 4892: "D", $what); 4893: if ($hashref) { 4894: my @keys=split(/\&/,$what); 4895: foreach my $key (@keys) { 4896: delete($hashref->{$key}); 4897: } 4898: if (&untie_user_hash($hashref)) { 4899: &Reply($client, "ok\n", $userinput); 4900: } else { 4901: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". 4902: "while attempting deldom\n", $userinput); 4903: } 4904: } else { 4905: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ". 4906: "while attempting deldom\n", $userinput); 4907: } 4908: return 1; 4909: } 4910: &register_handler("deldom", \&del_domain_handler, 0, 1, 0); 4911: 4912: 4913: # Unencrypted get from the namespace database file at the domain level. 4914: # This function retrieves a keyed item from a specific named database in the 4915: # domain directory. 4916: # 4917: # Parameters: 4918: # $cmd - Command request keyword (get). 4919: # $tail - Tail of the command. This is a colon separated list 4920: # consisting of the domain and the 'namespace' 4921: # which selects the gdbm file to do the lookup in, 4922: # & separated list of keys to lookup. Note that 4923: # the values are returned as an & separated list too. 4924: # $client - File descriptor open on the client. 4925: # Returns: 4926: # 1 - Continue processing. 4927: # 0 - Exit. 4928: # Side effects: 4929: # reply is written to $client. 4930: # 4931: 4932: sub get_domain_handler { 4933: my ($cmd, $tail, $client) = @_; 4934: 4935: 4936: my $userinput = "$cmd:$tail"; 4937: 4938: my ($udom,$namespace,$what)=split(/:/,$tail,3); 4939: chomp($what); 4940: if ($namespace =~ /^enc/) { 4941: &Failure( $client, "refused\n", $userinput); 4942: } else { 4943: my @queries=split(/\&/,$what); 4944: my $qresult=''; 4945: my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_READER()); 4946: if ($hashref) { 4947: for (my $i=0;$i<=$#queries;$i++) { 4948: $qresult.="$hashref->{$queries[$i]}&"; 4949: } 4950: if (&untie_domain_hash($hashref)) { 4951: $qresult=~s/\&$//; 4952: &Reply($client, \$qresult, $userinput); 4953: } else { 4954: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ". 4955: "while attempting getdom\n",$userinput); 4956: } 4957: } else { 4958: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ". 4959: "while attempting getdom\n",$userinput); 4960: } 4961: } 4962: 4963: return 1; 4964: } 4965: &register_handler("getdom", \&get_domain_handler, 0, 1, 0); 4966: 4967: sub encrypted_get_domain_handler { 4968: my ($cmd, $tail, $client) = @_; 4969: 4970: my $userinput = "$cmd:$tail"; 4971: 4972: my ($udom,$namespace,$what)=split(/:/,$tail,3); 4973: chomp($what); 4974: my @queries=split(/\&/,$what); 4975: my $qresult=''; 4976: my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_READER()); 4977: if ($hashref) { 4978: for (my $i=0;$i<=$#queries;$i++) { 4979: $qresult.="$hashref->{$queries[$i]}&"; 4980: } 4981: if (&untie_domain_hash($hashref)) { 4982: $qresult=~s/\&$//; 4983: if ($cipher) { 4984: my $cmdlength=length($qresult); 4985: $qresult.=" "; 4986: my $encqresult=''; 4987: for (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) { 4988: $encqresult.= unpack("H16", 4989: $cipher->encrypt(substr($qresult, 4990: $encidx, 4991: 8))); 4992: } 4993: &Reply( $client, "enc:$cmdlength:$encqresult\n", $userinput); 4994: } else { 4995: &Failure( $client, "error:no_key\n", $userinput); 4996: } 4997: } else { 4998: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ". 4999: "while attempting egetdom\n",$userinput); 5000: } 5001: } else { 5002: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ". 5003: "while attempting egetdom\n",$userinput); 5004: } 5005: return 1; 5006: } 5007: &register_handler("egetdom", \&encrypted_get_domain_handler, 1, 1, 0); 5008: 5009: # 5010: # Puts an id to a domains id database. 5011: # 5012: # Parameters: 5013: # $cmd - The command that triggered us. 5014: # $tail - Remainder of the request other than the command. This is a 5015: # colon separated list containing: 5016: # $domain - The domain for which we are writing the id. 5017: # $pairs - The id info to write... this is and & separated list 5018: # of keyword=value. 5019: # $client - Socket open on the client. 5020: # Returns: 5021: # 1 - Continue processing. 5022: # Side effects: 5023: # reply is written to $client. 5024: # 5025: sub put_id_handler { 5026: my ($cmd,$tail,$client) = @_; 5027: 5028: 5029: my $userinput = "$cmd:$tail"; 5030: 5031: my ($udom,$what)=split(/:/,$tail); 5032: chomp($what); 5033: my @pairs=split(/\&/,$what); 5034: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_WRCREAT(), 5035: "P", $what); 5036: if ($hashref) { 5037: foreach my $pair (@pairs) { 5038: my ($key,$value)=split(/=/,$pair); 5039: $hashref->{$key}=$value; 5040: } 5041: if (&untie_domain_hash($hashref)) { 5042: &Reply($client, "ok\n", $userinput); 5043: } else { 5044: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". 5045: "while attempting idput\n", $userinput); 5046: } 5047: } else { 5048: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ". 5049: "while attempting idput\n", $userinput); 5050: } 5051: 5052: return 1; 5053: } 5054: &register_handler("idput", \&put_id_handler, 0, 1, 0); 5055: 5056: # 5057: # Retrieves a set of id values from the id database. 5058: # Returns an & separated list of results, one for each requested id to the 5059: # client. 5060: # 5061: # Parameters: 5062: # $cmd - Command keyword that caused us to be dispatched. 5063: # $tail - Tail of the command. Consists of a colon separated: 5064: # domain - the domain whose id table we dump 5065: # ids Consists of an & separated list of 5066: # id keywords whose values will be fetched. 5067: # nonexisting keywords will have an empty value. 5068: # $client - Socket open on the client. 5069: # 5070: # Returns: 5071: # 1 - indicating processing should continue. 5072: # Side effects: 5073: # An & separated list of results is written to $client. 5074: # 5075: sub get_id_handler { 5076: my ($cmd, $tail, $client) = @_; 5077: 5078: 5079: my $userinput = "$client:$tail"; 5080: 5081: my ($udom,$what)=split(/:/,$tail); 5082: chomp($what); 5083: my @queries=split(/\&/,$what); 5084: my $qresult=''; 5085: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_READER()); 5086: if ($hashref) { 5087: for (my $i=0;$i<=$#queries;$i++) { 5088: $qresult.="$hashref->{$queries[$i]}&"; 5089: } 5090: if (&untie_domain_hash($hashref)) { 5091: $qresult=~s/\&$//; 5092: &Reply($client, \$qresult, $userinput); 5093: } else { 5094: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ". 5095: "while attempting idget\n",$userinput); 5096: } 5097: } else { 5098: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ". 5099: "while attempting idget\n",$userinput); 5100: } 5101: 5102: return 1; 5103: } 5104: &register_handler("idget", \&get_id_handler, 0, 1, 0); 5105: 5106: # Deletes one or more ids in a domain's id database. 5107: # 5108: # Parameters: 5109: # $cmd - Command keyword (iddel). 5110: # $tail - Command tail. In this case a colon 5111: # separated list containing: 5112: # The domain for which we are deleting the id(s). 5113: # &-separated list of id(s) to delete. 5114: # $client - File open on client socket. 5115: # Returns: 5116: # 1 - Continue processing 5117: # 0 - Exit server. 5118: # 5119: # 5120: 5121: sub del_id_handler { 5122: my ($cmd,$tail,$client) = @_; 5123: 5124: my $userinput = "$cmd:$tail"; 5125: 5126: my ($udom,$what)=split(/:/,$tail); 5127: chomp($what); 5128: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_WRCREAT(), 5129: "D", $what); 5130: if ($hashref) { 5131: my @keys=split(/\&/,$what); 5132: foreach my $key (@keys) { 5133: delete($hashref->{$key}); 5134: } 5135: if (&untie_user_hash($hashref)) { 5136: &Reply($client, "ok\n", $userinput); 5137: } else { 5138: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". 5139: "while attempting iddel\n", $userinput); 5140: } 5141: } else { 5142: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ". 5143: "while attempting iddel\n", $userinput); 5144: } 5145: return 1; 5146: } 5147: &register_handler("iddel", \&del_id_handler, 0, 1, 0); 5148: 5149: # 5150: # Puts broadcast e-mail sent by Domain Coordinator in nohist_dcmail database 5151: # 5152: # Parameters 5153: # $cmd - Command keyword that caused us to be dispatched. 5154: # $tail - Tail of the command. Consists of a colon separated: 5155: # domain - the domain whose dcmail we are recording 5156: # email Consists of key=value pair 5157: # where key is unique msgid 5158: # and value is message (in XML) 5159: # $client - Socket open on the client. 5160: # 5161: # Returns: 5162: # 1 - indicating processing should continue. 5163: # Side effects 5164: # reply is written to $client. 5165: # 5166: sub put_dcmail_handler { 5167: my ($cmd,$tail,$client) = @_; 5168: my $userinput = "$cmd:$tail"; 5169: 5170: 5171: my ($udom,$what)=split(/:/,$tail); 5172: chomp($what); 5173: my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT()); 5174: if ($hashref) { 5175: my ($key,$value)=split(/=/,$what); 5176: $hashref->{$key}=$value; 5177: } 5178: if (&untie_domain_hash($hashref)) { 5179: &Reply($client, "ok\n", $userinput); 5180: } else { 5181: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". 5182: "while attempting dcmailput\n", $userinput); 5183: } 5184: return 1; 5185: } 5186: &register_handler("dcmailput", \&put_dcmail_handler, 0, 1, 0); 5187: 5188: # 5189: # Retrieves broadcast e-mail from nohist_dcmail database 5190: # Returns to client an & separated list of key=value pairs, 5191: # where key is msgid and value is message information. 5192: # 5193: # Parameters 5194: # $cmd - Command keyword that caused us to be dispatched. 5195: # $tail - Tail of the command. Consists of a colon separated: 5196: # domain - the domain whose dcmail table we dump 5197: # startfilter - beginning of time window 5198: # endfilter - end of time window 5199: # sendersfilter - & separated list of username:domain 5200: # for senders to search for. 5201: # $client - Socket open on the client. 5202: # 5203: # Returns: 5204: # 1 - indicating processing should continue. 5205: # Side effects 5206: # reply (& separated list of msgid=messageinfo pairs) is 5207: # written to $client. 5208: # 5209: sub dump_dcmail_handler { 5210: my ($cmd, $tail, $client) = @_; 5211: 5212: my $userinput = "$cmd:$tail"; 5213: my ($udom,$startfilter,$endfilter,$sendersfilter) = split(/:/,$tail); 5214: chomp($sendersfilter); 5215: my @senders = (); 5216: if (defined($startfilter)) { 5217: $startfilter=&unescape($startfilter); 5218: } else { 5219: $startfilter='.'; 5220: } 5221: if (defined($endfilter)) { 5222: $endfilter=&unescape($endfilter); 5223: } else { 5224: $endfilter='.'; 5225: } 5226: if (defined($sendersfilter)) { 5227: $sendersfilter=&unescape($sendersfilter); 5228: @senders = map { &unescape($_) } split(/\&/,$sendersfilter); 5229: } 5230: 5231: my $qresult=''; 5232: my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT()); 5233: if ($hashref) { 5234: while (my ($key,$value) = each(%$hashref)) { 5235: my $match = 1; 5236: my ($timestamp,$subj,$uname,$udom) = 5237: split(/:/,&unescape(&unescape($key)),5); # yes, twice really 5238: $subj = &unescape($subj); 5239: unless ($startfilter eq '.' || !defined($startfilter)) { 5240: if ($timestamp < $startfilter) { 5241: $match = 0; 5242: } 5243: } 5244: unless ($endfilter eq '.' || !defined($endfilter)) { 5245: if ($timestamp > $endfilter) { 5246: $match = 0; 5247: } 5248: } 5249: unless (@senders < 1) { 5250: unless (grep/^$uname:$udom$/,@senders) { 5251: $match = 0; 5252: } 5253: } 5254: if ($match == 1) { 5255: $qresult.=$key.'='.$value.'&'; 5256: } 5257: } 5258: if (&untie_domain_hash($hashref)) { 5259: chop($qresult); 5260: &Reply($client, \$qresult, $userinput); 5261: } else { 5262: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". 5263: "while attempting dcmaildump\n", $userinput); 5264: } 5265: } else { 5266: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ". 5267: "while attempting dcmaildump\n", $userinput); 5268: } 5269: return 1; 5270: } 5271: 5272: &register_handler("dcmaildump", \&dump_dcmail_handler, 0, 1, 0); 5273: 5274: # 5275: # Puts domain roles in nohist_domainroles database 5276: # 5277: # Parameters 5278: # $cmd - Command keyword that caused us to be dispatched. 5279: # $tail - Tail of the command. Consists of a colon separated: 5280: # domain - the domain whose roles we are recording 5281: # role - Consists of key=value pair 5282: # where key is unique role 5283: # and value is start/end date information 5284: # $client - Socket open on the client. 5285: # 5286: # Returns: 5287: # 1 - indicating processing should continue. 5288: # Side effects 5289: # reply is written to $client. 5290: # 5291: 5292: sub put_domainroles_handler { 5293: my ($cmd,$tail,$client) = @_; 5294: 5295: my $userinput = "$cmd:$tail"; 5296: my ($udom,$what)=split(/:/,$tail); 5297: chomp($what); 5298: my @pairs=split(/\&/,$what); 5299: my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT()); 5300: if ($hashref) { 5301: foreach my $pair (@pairs) { 5302: my ($key,$value)=split(/=/,$pair); 5303: $hashref->{$key}=$value; 5304: } 5305: if (&untie_domain_hash($hashref)) { 5306: &Reply($client, "ok\n", $userinput); 5307: } else { 5308: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". 5309: "while attempting domroleput\n", $userinput); 5310: } 5311: } else { 5312: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ". 5313: "while attempting domroleput\n", $userinput); 5314: } 5315: 5316: return 1; 5317: } 5318: 5319: &register_handler("domroleput", \&put_domainroles_handler, 0, 1, 0); 5320: 5321: # 5322: # Retrieves domain roles from nohist_domainroles database 5323: # Returns to client an & separated list of key=value pairs, 5324: # where key is role and value is start and end date information. 5325: # 5326: # Parameters 5327: # $cmd - Command keyword that caused us to be dispatched. 5328: # $tail - Tail of the command. Consists of a colon separated: 5329: # domain - the domain whose domain roles table we dump 5330: # $client - Socket open on the client. 5331: # 5332: # Returns: 5333: # 1 - indicating processing should continue. 5334: # Side effects 5335: # reply (& separated list of role=start/end info pairs) is 5336: # written to $client. 5337: # 5338: sub dump_domainroles_handler { 5339: my ($cmd, $tail, $client) = @_; 5340: 5341: my $userinput = "$cmd:$tail"; 5342: my ($udom,$startfilter,$endfilter,$rolesfilter) = split(/:/,$tail); 5343: chomp($rolesfilter); 5344: my @roles = (); 5345: if (defined($startfilter)) { 5346: $startfilter=&unescape($startfilter); 5347: } else { 5348: $startfilter='.'; 5349: } 5350: if (defined($endfilter)) { 5351: $endfilter=&unescape($endfilter); 5352: } else { 5353: $endfilter='.'; 5354: } 5355: if (defined($rolesfilter)) { 5356: $rolesfilter=&unescape($rolesfilter); 5357: @roles = split(/\&/,$rolesfilter); 5358: } 5359: 5360: my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT()); 5361: if ($hashref) { 5362: my $qresult = ''; 5363: while (my ($key,$value) = each(%$hashref)) { 5364: my $match = 1; 5365: my ($end,$start) = split(/:/,&unescape($value)); 5366: my ($trole,$uname,$udom,$runame,$rudom,$rsec) = split(/:/,&unescape($key)); 5367: unless (@roles < 1) { 5368: unless (grep/^\Q$trole\E$/,@roles) { 5369: $match = 0; 5370: next; 5371: } 5372: } 5373: unless ($startfilter eq '.' || !defined($startfilter)) { 5374: if ((defined($start)) && ($start >= $startfilter)) { 5375: $match = 0; 5376: next; 5377: } 5378: } 5379: unless ($endfilter eq '.' || !defined($endfilter)) { 5380: if ((defined($end)) && (($end > 0) && ($end <= $endfilter))) { 5381: $match = 0; 5382: next; 5383: } 5384: } 5385: if ($match == 1) { 5386: $qresult.=$key.'='.$value.'&'; 5387: } 5388: } 5389: if (&untie_domain_hash($hashref)) { 5390: chop($qresult); 5391: &Reply($client, \$qresult, $userinput); 5392: } else { 5393: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". 5394: "while attempting domrolesdump\n", $userinput); 5395: } 5396: } else { 5397: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ". 5398: "while attempting domrolesdump\n", $userinput); 5399: } 5400: return 1; 5401: } 5402: 5403: &register_handler("domrolesdump", \&dump_domainroles_handler, 0, 1, 0); 5404: 5405: 5406: # Process the tmpput command I'm not sure what this does.. Seems to 5407: # create a file in the lonDaemons/tmp directory of the form $id.tmp 5408: # where Id is the client's ip concatenated with a sequence number. 5409: # The file will contain some value that is passed in. Is this e.g. 5410: # a login token? 5411: # 5412: # Parameters: 5413: # $cmd - The command that got us dispatched. 5414: # $tail - The remainder of the request following $cmd: 5415: # In this case this will be the contents of the file. 5416: # $client - Socket connected to the client. 5417: # Returns: 5418: # 1 indicating processing can continue. 5419: # Side effects: 5420: # A file is created in the local filesystem. 5421: # A reply is sent to the client. 5422: sub tmp_put_handler { 5423: my ($cmd, $what, $client) = @_; 5424: 5425: my $userinput = "$cmd:$what"; # Reconstruct for logging. 5426: 5427: my ($record,$context) = split(/:/,$what); 5428: if ($context ne '') { 5429: chomp($context); 5430: $context = &unescape($context); 5431: } 5432: my ($id,$store); 5433: $tmpsnum++; 5434: if (($context eq 'resetpw') || ($context eq 'createaccount')) { 5435: $id = &md5_hex(&md5_hex(time.{}.rand().$$)); 5436: } else { 5437: $id = $$.'_'.$clientip.'_'.$tmpsnum; 5438: } 5439: $id=~s/\W/\_/g; 5440: $record=~s/\n//g; 5441: my $execdir=$perlvar{'lonDaemons'}; 5442: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) { 5443: print $store $record; 5444: close $store; 5445: &Reply($client, \$id, $userinput); 5446: } else { 5447: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ". 5448: "while attempting tmpput\n", $userinput); 5449: } 5450: return 1; 5451: 5452: } 5453: &register_handler("tmpput", \&tmp_put_handler, 0, 1, 0); 5454: 5455: # Processes the tmpget command. This command returns the contents 5456: # of a temporary resource file(?) created via tmpput. 5457: # 5458: # Paramters: 5459: # $cmd - Command that got us dispatched. 5460: # $id - Tail of the command, contain the id of the resource 5461: # we want to fetch. 5462: # $client - socket open on the client. 5463: # Return: 5464: # 1 - Inidcating processing can continue. 5465: # Side effects: 5466: # A reply is sent to the client. 5467: # 5468: sub tmp_get_handler { 5469: my ($cmd, $id, $client) = @_; 5470: 5471: my $userinput = "$cmd:$id"; 5472: 5473: 5474: $id=~s/\W/\_/g; 5475: my $store; 5476: my $execdir=$perlvar{'lonDaemons'}; 5477: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) { 5478: my $reply=<$store>; 5479: &Reply( $client, \$reply, $userinput); 5480: close $store; 5481: } else { 5482: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ". 5483: "while attempting tmpget\n", $userinput); 5484: } 5485: 5486: return 1; 5487: } 5488: &register_handler("tmpget", \&tmp_get_handler, 0, 1, 0); 5489: 5490: # 5491: # Process the tmpdel command. This command deletes a temp resource 5492: # created by the tmpput command. 5493: # 5494: # Parameters: 5495: # $cmd - Command that got us here. 5496: # $id - Id of the temporary resource created. 5497: # $client - socket open on the client process. 5498: # 5499: # Returns: 5500: # 1 - Indicating processing should continue. 5501: # Side Effects: 5502: # A file is deleted 5503: # A reply is sent to the client. 5504: sub tmp_del_handler { 5505: my ($cmd, $id, $client) = @_; 5506: 5507: my $userinput= "$cmd:$id"; 5508: 5509: chomp($id); 5510: $id=~s/\W/\_/g; 5511: my $execdir=$perlvar{'lonDaemons'}; 5512: if (unlink("$execdir/tmp/$id.tmp")) { 5513: &Reply($client, "ok\n", $userinput); 5514: } else { 5515: &Failure( $client, "error: ".($!+0)."Unlink tmp Failed ". 5516: "while attempting tmpdel\n", $userinput); 5517: } 5518: 5519: return 1; 5520: 5521: } 5522: &register_handler("tmpdel", \&tmp_del_handler, 0, 1, 0); 5523: 5524: # 5525: # Process the delbalcookie command. This command deletes a balancer 5526: # cookie in the lonBalancedir directory created by switchserver 5527: # 5528: # Parameters: 5529: # $cmd - Command that got us here. 5530: # $cookie - Cookie to be deleted. 5531: # $client - socket open on the client process. 5532: # 5533: # Returns: 5534: # 1 - Indicating processing should continue. 5535: # Side Effects: 5536: # A cookie file is deleted from the lonBalancedir directory 5537: # A reply is sent to the client. 5538: sub del_balcookie_handler { 5539: my ($cmd, $cookie, $client) = @_; 5540: 5541: my $userinput= "$cmd:$cookie"; 5542: 5543: chomp($cookie); 5544: my $deleted = ''; 5545: if ($cookie =~ /^$LONCAPA::match_domain\_$LONCAPA::match_username\_[a-f0-9]{32}$/) { 5546: my $execdir=$perlvar{'lonBalanceDir'}; 5547: if (-e "$execdir/$cookie.id") { 5548: if (open(my $fh,'<',"$execdir/$cookie.id")) { 5549: my $dodelete; 5550: while (my $line = <$fh>) { 5551: chomp($line); 5552: if ($line eq $clientname) { 5553: $dodelete = 1; 5554: last; 5555: } 5556: } 5557: close($fh); 5558: if ($dodelete) { 5559: if (unlink("$execdir/$cookie.id")) { 5560: $deleted = 1; 5561: } 5562: } 5563: } 5564: } 5565: } 5566: if ($deleted) { 5567: &Reply($client, "ok\n", $userinput); 5568: } else { 5569: &Failure( $client, "error: ".($!+0)."Unlinking cookie file Failed ". 5570: "while attempting delbalcookie\n", $userinput); 5571: } 5572: return 1; 5573: } 5574: &register_handler("delbalcookie", \&del_balcookie_handler, 0, 1, 0); 5575: 5576: # 5577: # Processes the setannounce command. This command 5578: # creates a file named announce.txt in the top directory of 5579: # the documentn root and sets its contents. The announce.txt file is 5580: # printed in its entirety at the LonCAPA login page. Note: 5581: # once the announcement.txt fileis created it cannot be deleted. 5582: # However, setting the contents of the file to empty removes the 5583: # announcement from the login page of loncapa so who cares. 5584: # 5585: # Parameters: 5586: # $cmd - The command that got us dispatched. 5587: # $announcement - The text of the announcement. 5588: # $client - Socket open on the client process. 5589: # Retunrns: 5590: # 1 - Indicating request processing should continue 5591: # Side Effects: 5592: # The file {DocRoot}/announcement.txt is created. 5593: # A reply is sent to $client. 5594: # 5595: sub set_announce_handler { 5596: my ($cmd, $announcement, $client) = @_; 5597: 5598: my $userinput = "$cmd:$announcement"; 5599: 5600: chomp($announcement); 5601: $announcement=&unescape($announcement); 5602: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}. 5603: '/announcement.txt')) { 5604: print $store $announcement; 5605: close $store; 5606: &Reply($client, "ok\n", $userinput); 5607: } else { 5608: &Failure($client, "error: ".($!+0)."\n", $userinput); 5609: } 5610: 5611: return 1; 5612: } 5613: &register_handler("setannounce", \&set_announce_handler, 0, 1, 0); 5614: 5615: # 5616: # Return the version of the daemon. This can be used to determine 5617: # the compatibility of cross version installations or, alternatively to 5618: # simply know who's out of date and who isn't. Note that the version 5619: # is returned concatenated with the tail. 5620: # Parameters: 5621: # $cmd - the request that dispatched to us. 5622: # $tail - Tail of the request (client's version?). 5623: # $client - Socket open on the client. 5624: #Returns: 5625: # 1 - continue processing requests. 5626: # Side Effects: 5627: # Replies with version to $client. 5628: sub get_version_handler { 5629: my ($cmd, $tail, $client) = @_; 5630: 5631: my $userinput = $cmd.$tail; 5632: 5633: &Reply($client, &version($userinput)."\n", $userinput); 5634: 5635: 5636: return 1; 5637: } 5638: &register_handler("version", \&get_version_handler, 0, 1, 0); 5639: 5640: # Set the current host and domain. This is used to support 5641: # multihomed systems. Each IP of the system, or even separate daemons 5642: # on the same IP can be treated as handling a separate lonCAPA virtual 5643: # machine. This command selects the virtual lonCAPA. The client always 5644: # knows the right one since it is lonc and it is selecting the domain/system 5645: # from the hosts.tab file. 5646: # Parameters: 5647: # $cmd - Command that dispatched us. 5648: # $tail - Tail of the command (domain/host requested). 5649: # $socket - Socket open on the client. 5650: # 5651: # Returns: 5652: # 1 - Indicates the program should continue to process requests. 5653: # Side-effects: 5654: # The default domain/system context is modified for this daemon. 5655: # a reply is sent to the client. 5656: # 5657: sub set_virtual_host_handler { 5658: my ($cmd, $tail, $socket) = @_; 5659: 5660: my $userinput ="$cmd:$tail"; 5661: 5662: &Reply($client, &sethost($userinput)."\n", $userinput); 5663: 5664: 5665: return 1; 5666: } 5667: &register_handler("sethost", \&set_virtual_host_handler, 0, 1, 0); 5668: 5669: # Process a request to exit: 5670: # - "bye" is sent to the client. 5671: # - The client socket is shutdown and closed. 5672: # - We indicate to the caller that we should exit. 5673: # Formal Parameters: 5674: # $cmd - The command that got us here. 5675: # $tail - Tail of the command (empty). 5676: # $client - Socket open on the tail. 5677: # Returns: 5678: # 0 - Indicating the program should exit!! 5679: # 5680: sub exit_handler { 5681: my ($cmd, $tail, $client) = @_; 5682: 5683: my $userinput = "$cmd:$tail"; 5684: 5685: &logthis("Client $clientip ($clientname) hanging up: $userinput"); 5686: &Reply($client, "bye\n", $userinput); 5687: $client->shutdown(2); # shutdown the socket forcibly. 5688: $client->close(); 5689: 5690: return 0; 5691: } 5692: &register_handler("exit", \&exit_handler, 0,1,1); 5693: &register_handler("init", \&exit_handler, 0,1,1); 5694: &register_handler("quit", \&exit_handler, 0,1,1); 5695: 5696: # Determine if auto-enrollment is enabled. 5697: # Note that the original had what I believe to be a defect. 5698: # The original returned 0 if the requestor was not a registerd client. 5699: # It should return "refused". 5700: # Formal Parameters: 5701: # $cmd - The command that invoked us. 5702: # $tail - The tail of the command (Extra command parameters. 5703: # $client - The socket open on the client that issued the request. 5704: # Returns: 5705: # 1 - Indicating processing should continue. 5706: # 5707: sub enrollment_enabled_handler { 5708: my ($cmd, $tail, $client) = @_; 5709: my $userinput = $cmd.":".$tail; # For logging purposes. 5710: 5711: 5712: my ($cdom) = split(/:/, $tail, 2); # Domain we're asking about. 5713: 5714: my $outcome = &localenroll::run($cdom); 5715: &Reply($client, \$outcome, $userinput); 5716: 5717: return 1; 5718: } 5719: &register_handler("autorun", \&enrollment_enabled_handler, 0, 1, 0); 5720: 5721: # 5722: # Validate an institutional code used for a LON-CAPA course. 5723: # 5724: # Formal Parameters: 5725: # $cmd - The command request that got us dispatched. 5726: # $tail - The tail of the command. In this case, 5727: # this is a colon separated set of words that will be split 5728: # into: 5729: # $dom - The domain for which the check of 5730: # institutional course code will occur. 5731: # 5732: # $instcode - The institutional code for the course 5733: # being requested, or validated for rights 5734: # to request. 5735: # 5736: # $owner - The course requestor (who will be the 5737: # course owner, in the form username:domain 5738: # 5739: # $client - Socket open on the client. 5740: # Returns: 5741: # 1 - Indicating processing should continue. 5742: # 5743: sub validate_instcode_handler { 5744: my ($cmd, $tail, $client) = @_; 5745: my $userinput = "$cmd:$tail"; 5746: my ($dom,$instcode,$owner) = split(/:/, $tail); 5747: $instcode = &unescape($instcode); 5748: $owner = &unescape($owner); 5749: my ($outcome,$description,$credits) = 5750: &localenroll::validate_instcode($dom,$instcode,$owner); 5751: my $result = &escape($outcome).'&'.&escape($description).'&'. 5752: &escape($credits); 5753: &Reply($client, \$result, $userinput); 5754: 5755: return 1; 5756: } 5757: &register_handler("autovalidateinstcode", \&validate_instcode_handler, 0, 1, 0); 5758: 5759: # Get the official sections for which auto-enrollment is possible. 5760: # Since the admin people won't know about 'unofficial sections' 5761: # we cannot auto-enroll on them. 5762: # Formal Parameters: 5763: # $cmd - The command request that got us dispatched here. 5764: # $tail - The remainder of the request. In our case this 5765: # will be split into: 5766: # $coursecode - The course name from the admin point of view. 5767: # $cdom - The course's domain(?). 5768: # $client - Socket open on the client. 5769: # Returns: 5770: # 1 - Indiciting processing should continue. 5771: # 5772: sub get_sections_handler { 5773: my ($cmd, $tail, $client) = @_; 5774: my $userinput = "$cmd:$tail"; 5775: 5776: my ($coursecode, $cdom) = split(/:/, $tail); 5777: my @secs = &localenroll::get_sections($coursecode,$cdom); 5778: my $seclist = &escape(join(':',@secs)); 5779: 5780: &Reply($client, \$seclist, $userinput); 5781: 5782: 5783: return 1; 5784: } 5785: &register_handler("autogetsections", \&get_sections_handler, 0, 1, 0); 5786: 5787: # Validate the owner of a new course section. 5788: # 5789: # Formal Parameters: 5790: # $cmd - Command that got us dispatched. 5791: # $tail - the remainder of the command. For us this consists of a 5792: # colon separated string containing: 5793: # $inst - Course Id from the institutions point of view. 5794: # $owner - Proposed owner of the course. 5795: # $cdom - Domain of the course (from the institutions 5796: # point of view?).. 5797: # $client - Socket open on the client. 5798: # 5799: # Returns: 5800: # 1 - Processing should continue. 5801: # 5802: sub validate_course_owner_handler { 5803: my ($cmd, $tail, $client) = @_; 5804: my $userinput = "$cmd:$tail"; 5805: my ($inst_course_id, $owner, $cdom, $coowners) = split(/:/, $tail); 5806: 5807: $owner = &unescape($owner); 5808: $coowners = &unescape($coowners); 5809: my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom,$coowners); 5810: &Reply($client, \$outcome, $userinput); 5811: 5812: 5813: 5814: return 1; 5815: } 5816: &register_handler("autonewcourse", \&validate_course_owner_handler, 0, 1, 0); 5817: 5818: # 5819: # Validate a course section in the official schedule of classes 5820: # from the institutions point of view (part of autoenrollment). 5821: # 5822: # Formal Parameters: 5823: # $cmd - The command request that got us dispatched. 5824: # $tail - The tail of the command. In this case, 5825: # this is a colon separated set of words that will be split 5826: # into: 5827: # $inst_course_id - The course/section id from the 5828: # institutions point of view. 5829: # $cdom - The domain from the institutions 5830: # point of view. 5831: # $client - Socket open on the client. 5832: # Returns: 5833: # 1 - Indicating processing should continue. 5834: # 5835: sub validate_course_section_handler { 5836: my ($cmd, $tail, $client) = @_; 5837: my $userinput = "$cmd:$tail"; 5838: my ($inst_course_id, $cdom) = split(/:/, $tail); 5839: 5840: my $outcome=&localenroll::validate_courseID($inst_course_id,$cdom); 5841: &Reply($client, \$outcome, $userinput); 5842: 5843: 5844: return 1; 5845: } 5846: &register_handler("autovalidatecourse", \&validate_course_section_handler, 0, 1, 0); 5847: 5848: # 5849: # Validate course owner's access to enrollment data for specific class section. 5850: # 5851: # 5852: # Formal Parameters: 5853: # $cmd - The command request that got us dispatched. 5854: # $tail - The tail of the command. In this case this is a colon separated 5855: # set of values that will be split into: 5856: # $inst_class - Institutional code for the specific class section 5857: # $ownerlist - An escaped comma-separated list of username:domain 5858: # of the course owner, and co-owner(s). 5859: # $cdom - The domain of the course from the institution's 5860: # point of view. 5861: # $client - The socket open on the client. 5862: # Returns: 5863: # 1 - continue processing. 5864: # 5865: 5866: sub validate_class_access_handler { 5867: my ($cmd, $tail, $client) = @_; 5868: my $userinput = "$cmd:$tail"; 5869: my ($inst_class,$ownerlist,$cdom) = split(/:/, $tail); 5870: my $owners = &unescape($ownerlist); 5871: my $outcome; 5872: eval { 5873: local($SIG{__DIE__})='DEFAULT'; 5874: $outcome=&localenroll::check_section($inst_class,$owners,$cdom); 5875: }; 5876: &Reply($client,\$outcome, $userinput); 5877: 5878: return 1; 5879: } 5880: &register_handler("autovalidateclass_sec", \&validate_class_access_handler, 0, 1, 0); 5881: 5882: # 5883: # Validate course owner or co-owners(s) access to enrollment data for all sections 5884: # and crosslistings for a particular course. 5885: # 5886: # 5887: # Formal Parameters: 5888: # $cmd - The command request that got us dispatched. 5889: # $tail - The tail of the command. In this case this is a colon separated 5890: # set of values that will be split into: 5891: # $ownerlist - An escaped comma-separated list of username:domain 5892: # of the course owner, and co-owner(s). 5893: # $cdom - The domain of the course from the institution's 5894: # point of view. 5895: # $classes - Frozen hash of institutional course sections and 5896: # crosslistings. 5897: # $client - The socket open on the client. 5898: # Returns: 5899: # 1 - continue processing. 5900: # 5901: 5902: sub validate_classes_handler { 5903: my ($cmd, $tail, $client) = @_; 5904: my $userinput = "$cmd:$tail"; 5905: my ($ownerlist,$cdom,$classes) = split(/:/, $tail); 5906: my $classesref = &Apache::lonnet::thaw_unescape($classes); 5907: my $owners = &unescape($ownerlist); 5908: my $result; 5909: eval { 5910: local($SIG{__DIE__})='DEFAULT'; 5911: my %validations; 5912: my $response = &localenroll::check_instclasses($owners,$cdom,$classesref, 5913: \%validations); 5914: if ($response eq 'ok') { 5915: foreach my $key (keys(%validations)) { 5916: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($validations{$key}).'&'; 5917: } 5918: $result =~ s/\&$//; 5919: } else { 5920: $result = 'error'; 5921: } 5922: }; 5923: if (!$@) { 5924: &Reply($client, \$result, $userinput); 5925: } else { 5926: &Failure($client,"unknown_cmd\n",$userinput); 5927: } 5928: return 1; 5929: } 5930: &register_handler("autovalidateinstclasses", \&validate_classes_handler, 0, 1, 0); 5931: 5932: # 5933: # Create a password for a new LON-CAPA user added by auto-enrollment. 5934: # Only used for case where authentication method for new user is localauth 5935: # 5936: # Formal Parameters: 5937: # $cmd - The command request that got us dispatched. 5938: # $tail - The tail of the command. In this case this is a colon separated 5939: # set of words that will be split into: 5940: # $authparam - An authentication parameter (localauth parameter). 5941: # $cdom - The domain of the course from the institution's 5942: # point of view. 5943: # $client - The socket open on the client. 5944: # Returns: 5945: # 1 - continue processing. 5946: # 5947: sub create_auto_enroll_password_handler { 5948: my ($cmd, $tail, $client) = @_; 5949: my $userinput = "$cmd:$tail"; 5950: 5951: my ($authparam, $cdom) = split(/:/, $userinput); 5952: 5953: my ($create_passwd,$authchk); 5954: ($authparam, 5955: $create_passwd, 5956: $authchk) = &localenroll::create_password($authparam,$cdom); 5957: 5958: &Reply($client, &escape($authparam.':'.$create_passwd.':'.$authchk)."\n", 5959: $userinput); 5960: 5961: 5962: return 1; 5963: } 5964: &register_handler("autocreatepassword", \&create_auto_enroll_password_handler, 5965: 0, 1, 0); 5966: 5967: sub auto_export_grades_handler { 5968: my ($cmd, $tail, $client) = @_; 5969: my $userinput = "$cmd:$tail"; 5970: my ($cdom,$cnum,$info,$data) = split(/:/,$tail); 5971: my $inforef = &Apache::lonnet::thaw_unescape($info); 5972: my $dataref = &Apache::lonnet::thaw_unescape($data); 5973: my ($outcome,$result);; 5974: eval { 5975: local($SIG{__DIE__})='DEFAULT'; 5976: my %rtnhash; 5977: $outcome=&localenroll::export_grades($cdom,$cnum,$inforef,$dataref,\%rtnhash); 5978: if ($outcome eq 'ok') { 5979: foreach my $key (keys(%rtnhash)) { 5980: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rtnhash{$key}).'&'; 5981: } 5982: $result =~ s/\&$//; 5983: } 5984: }; 5985: if (!$@) { 5986: if ($outcome eq 'ok') { 5987: if ($cipher) { 5988: my $cmdlength=length($result); 5989: $result.=" "; 5990: my $encresult=''; 5991: for (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) { 5992: $encresult.= unpack("H16", 5993: $cipher->encrypt(substr($result, 5994: $encidx, 5995: 8))); 5996: } 5997: &Reply( $client, "enc:$cmdlength:$encresult\n", $userinput); 5998: } else { 5999: &Failure( $client, "error:no_key\n", $userinput); 6000: } 6001: } else { 6002: &Reply($client, "$outcome\n", $userinput); 6003: } 6004: } else { 6005: &Failure($client,"export_error\n",$userinput); 6006: } 6007: return 1; 6008: } 6009: &register_handler("autoexportgrades", \&auto_export_grades_handler, 6010: 1, 1, 0); 6011: 6012: # Retrieve and remove temporary files created by/during autoenrollment. 6013: # 6014: # Formal Parameters: 6015: # $cmd - The command that got us dispatched. 6016: # $tail - The tail of the command. In our case this is a colon 6017: # separated list that will be split into: 6018: # $filename - The name of the file to retrieve. 6019: # The filename is given as a path relative to 6020: # the LonCAPA temp file directory. 6021: # $client - Socket open on the client. 6022: # 6023: # Returns: 6024: # 1 - Continue processing. 6025: sub retrieve_auto_file_handler { 6026: my ($cmd, $tail, $client) = @_; 6027: my $userinput = "cmd:$tail"; 6028: 6029: my ($filename) = split(/:/, $tail); 6030: 6031: my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename; 6032: 6033: if ($filename =~m{/\.\./}) { 6034: &Failure($client, "refused\n", $userinput); 6035: } elsif ($filename !~ /^$LONCAPA::match_domain\_$LONCAPA::match_courseid\_.+_classlist\.xml$/) { 6036: &Failure($client, "refused\n", $userinput); 6037: } elsif ( (-e $source) && ($filename ne '') ) { 6038: my $reply = ''; 6039: if (open(my $fh,$source)) { 6040: while (<$fh>) { 6041: chomp($_); 6042: $_ =~ s/^\s+//g; 6043: $_ =~ s/\s+$//g; 6044: $reply .= $_; 6045: } 6046: close($fh); 6047: &Reply($client, &escape($reply)."\n", $userinput); 6048: 6049: # Does this have to be uncommented??!? (RF). 6050: # 6051: # unlink($source); 6052: } else { 6053: &Failure($client, "error\n", $userinput); 6054: } 6055: } else { 6056: &Failure($client, "error\n", $userinput); 6057: } 6058: 6059: 6060: return 1; 6061: } 6062: &register_handler("autoretrieve", \&retrieve_auto_file_handler, 0,1,0); 6063: 6064: sub crsreq_checks_handler { 6065: my ($cmd, $tail, $client) = @_; 6066: my $userinput = "$cmd:$tail"; 6067: my $dom = $tail; 6068: my $result; 6069: my @reqtypes = ('official','unofficial','community','textbook','placement'); 6070: eval { 6071: local($SIG{__DIE__})='DEFAULT'; 6072: my %validations; 6073: my $response = &localenroll::crsreq_checks($dom,\@reqtypes, 6074: \%validations); 6075: if ($response eq 'ok') { 6076: foreach my $key (keys(%validations)) { 6077: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($validations{$key}).'&'; 6078: } 6079: $result =~ s/\&$//; 6080: } else { 6081: $result = 'error'; 6082: } 6083: }; 6084: if (!$@) { 6085: &Reply($client, \$result, $userinput); 6086: } else { 6087: &Failure($client,"unknown_cmd\n",$userinput); 6088: } 6089: return 1; 6090: } 6091: &register_handler("autocrsreqchecks", \&crsreq_checks_handler, 0, 1, 0); 6092: 6093: sub validate_crsreq_handler { 6094: my ($cmd, $tail, $client) = @_; 6095: my $userinput = "$cmd:$tail"; 6096: my ($dom,$owner,$crstype,$inststatuslist,$instcode,$instseclist,$customdata) = split(/:/, $tail); 6097: $instcode = &unescape($instcode); 6098: $owner = &unescape($owner); 6099: $crstype = &unescape($crstype); 6100: $inststatuslist = &unescape($inststatuslist); 6101: $instcode = &unescape($instcode); 6102: $instseclist = &unescape($instseclist); 6103: my $custominfo = &Apache::lonnet::thaw_unescape($customdata); 6104: my $outcome; 6105: eval { 6106: local($SIG{__DIE__})='DEFAULT'; 6107: $outcome = &localenroll::validate_crsreq($dom,$owner,$crstype, 6108: $inststatuslist,$instcode, 6109: $instseclist,$custominfo); 6110: }; 6111: if (!$@) { 6112: &Reply($client, \$outcome, $userinput); 6113: } else { 6114: &Failure($client,"unknown_cmd\n",$userinput); 6115: } 6116: return 1; 6117: } 6118: &register_handler("autocrsreqvalidation", \&validate_crsreq_handler, 0, 1, 0); 6119: 6120: sub crsreq_update_handler { 6121: my ($cmd, $tail, $client) = @_; 6122: my $userinput = "$cmd:$tail"; 6123: my ($cdom,$cnum,$crstype,$action,$ownername,$ownerdomain,$fullname,$title,$code, 6124: $accessstart,$accessend,$infohashref) = 6125: split(/:/, $tail); 6126: $crstype = &unescape($crstype); 6127: $action = &unescape($action); 6128: $ownername = &unescape($ownername); 6129: $ownerdomain = &unescape($ownerdomain); 6130: $fullname = &unescape($fullname); 6131: $title = &unescape($title); 6132: $code = &unescape($code); 6133: $accessstart = &unescape($accessstart); 6134: $accessend = &unescape($accessend); 6135: my $incoming = &Apache::lonnet::thaw_unescape($infohashref); 6136: my ($result,$outcome); 6137: eval { 6138: local($SIG{__DIE__})='DEFAULT'; 6139: my %rtnhash; 6140: $outcome = &localenroll::crsreq_updates($cdom,$cnum,$crstype,$action, 6141: $ownername,$ownerdomain,$fullname, 6142: $title,$code,$accessstart,$accessend, 6143: $incoming,\%rtnhash); 6144: if ($outcome eq 'ok') { 6145: my @posskeys = qw(createdweb createdmsg createdcustomized createdactions queuedweb queuedmsg formitems reviewweb validationjs onload javascript); 6146: foreach my $key (keys(%rtnhash)) { 6147: if (grep(/^\Q$key\E/,@posskeys)) { 6148: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rtnhash{$key}).'&'; 6149: } 6150: } 6151: $result =~ s/\&$//; 6152: } 6153: }; 6154: if (!$@) { 6155: if ($outcome eq 'ok') { 6156: &Reply($client, \$result, $userinput); 6157: } else { 6158: &Reply($client, "format_error\n", $userinput); 6159: } 6160: } else { 6161: &Failure($client,"unknown_cmd\n",$userinput); 6162: } 6163: return 1; 6164: } 6165: &register_handler("autocrsrequpdate", \&crsreq_update_handler, 0, 1, 0); 6166: 6167: # 6168: # Read and retrieve institutional code format (for support form). 6169: # Formal Parameters: 6170: # $cmd - Command that dispatched us. 6171: # $tail - Tail of the command. In this case it conatins 6172: # the course domain and the coursename. 6173: # $client - Socket open on the client. 6174: # Returns: 6175: # 1 - Continue processing. 6176: # 6177: sub get_institutional_code_format_handler { 6178: my ($cmd, $tail, $client) = @_; 6179: my $userinput = "$cmd:$tail"; 6180: 6181: my $reply; 6182: my($cdom,$course) = split(/:/,$tail); 6183: my @pairs = split/\&/,$course; 6184: my %instcodes = (); 6185: my %codes = (); 6186: my @codetitles = (); 6187: my %cat_titles = (); 6188: my %cat_order = (); 6189: foreach (@pairs) { 6190: my ($key,$value) = split/=/,$_; 6191: $instcodes{&unescape($key)} = &unescape($value); 6192: } 6193: my $formatreply = &localenroll::instcode_format($cdom, 6194: \%instcodes, 6195: \%codes, 6196: \@codetitles, 6197: \%cat_titles, 6198: \%cat_order); 6199: if ($formatreply eq 'ok') { 6200: my $codes_str = &Apache::lonnet::hash2str(%codes); 6201: my $codetitles_str = &Apache::lonnet::array2str(@codetitles); 6202: my $cat_titles_str = &Apache::lonnet::hash2str(%cat_titles); 6203: my $cat_order_str = &Apache::lonnet::hash2str(%cat_order); 6204: &Reply($client, 6205: $codes_str.':'.$codetitles_str.':'.$cat_titles_str.':' 6206: .$cat_order_str."\n", 6207: $userinput); 6208: } else { 6209: # this else branch added by RF since if not ok, lonc will 6210: # hang waiting on reply until timeout. 6211: # 6212: &Reply($client, "format_error\n", $userinput); 6213: } 6214: 6215: return 1; 6216: } 6217: &register_handler("autoinstcodeformat", 6218: \&get_institutional_code_format_handler,0,1,0); 6219: 6220: sub get_institutional_defaults_handler { 6221: my ($cmd, $tail, $client) = @_; 6222: my $userinput = "$cmd:$tail"; 6223: 6224: my $dom = $tail; 6225: my %defaults_hash; 6226: my @code_order; 6227: my $outcome; 6228: eval { 6229: local($SIG{__DIE__})='DEFAULT'; 6230: $outcome = &localenroll::instcode_defaults($dom,\%defaults_hash, 6231: \@code_order); 6232: }; 6233: if (!$@) { 6234: if ($outcome eq 'ok') { 6235: my $result=''; 6236: while (my ($key,$value) = each(%defaults_hash)) { 6237: $result.=&escape($key).'='.&escape($value).'&'; 6238: } 6239: $result .= 'code_order='.&escape(join('&',@code_order)); 6240: &Reply($client,\$result,$userinput); 6241: } else { 6242: &Reply($client,"error\n", $userinput); 6243: } 6244: } else { 6245: &Failure($client,"unknown_cmd\n",$userinput); 6246: } 6247: } 6248: &register_handler("autoinstcodedefaults", 6249: \&get_institutional_defaults_handler,0,1,0); 6250: 6251: sub get_possible_instcodes_handler { 6252: my ($cmd, $tail, $client) = @_; 6253: my $userinput = "$cmd:$tail"; 6254: 6255: my $reply; 6256: my $cdom = $tail; 6257: my (@codetitles,%cat_titles,%cat_order,@code_order); 6258: my $formatreply = &localenroll::possible_instcodes($cdom, 6259: \@codetitles, 6260: \%cat_titles, 6261: \%cat_order, 6262: \@code_order); 6263: if ($formatreply eq 'ok') { 6264: my $result = join('&',map {&escape($_);} (@codetitles)).':'; 6265: $result .= join('&',map {&escape($_);} (@code_order)).':'; 6266: foreach my $key (keys(%cat_titles)) { 6267: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($cat_titles{$key}).'&'; 6268: } 6269: $result =~ s/\&$//; 6270: $result .= ':'; 6271: foreach my $key (keys(%cat_order)) { 6272: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($cat_order{$key}).'&'; 6273: } 6274: $result =~ s/\&$//; 6275: &Reply($client,\$result,$userinput); 6276: } else { 6277: &Reply($client, "format_error\n", $userinput); 6278: } 6279: return 1; 6280: } 6281: &register_handler("autopossibleinstcodes", 6282: \&get_possible_instcodes_handler,0,1,0); 6283: 6284: sub get_institutional_user_rules { 6285: my ($cmd, $tail, $client) = @_; 6286: my $userinput = "$cmd:$tail"; 6287: my $dom = &unescape($tail); 6288: my (%rules_hash,@rules_order); 6289: my $outcome; 6290: eval { 6291: local($SIG{__DIE__})='DEFAULT'; 6292: $outcome = &localenroll::username_rules($dom,\%rules_hash,\@rules_order); 6293: }; 6294: if (!$@) { 6295: if ($outcome eq 'ok') { 6296: my $result; 6297: foreach my $key (keys(%rules_hash)) { 6298: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&'; 6299: } 6300: $result =~ s/\&$//; 6301: $result .= ':'; 6302: if (@rules_order > 0) { 6303: foreach my $item (@rules_order) { 6304: $result .= &escape($item).'&'; 6305: } 6306: } 6307: $result =~ s/\&$//; 6308: &Reply($client,\$result,$userinput); 6309: } else { 6310: &Reply($client,"error\n", $userinput); 6311: } 6312: } else { 6313: &Failure($client,"unknown_cmd\n",$userinput); 6314: } 6315: } 6316: &register_handler("instuserrules",\&get_institutional_user_rules,0,1,0); 6317: 6318: sub get_institutional_id_rules { 6319: my ($cmd, $tail, $client) = @_; 6320: my $userinput = "$cmd:$tail"; 6321: my $dom = &unescape($tail); 6322: my (%rules_hash,@rules_order); 6323: my $outcome; 6324: eval { 6325: local($SIG{__DIE__})='DEFAULT'; 6326: $outcome = &localenroll::id_rules($dom,\%rules_hash,\@rules_order); 6327: }; 6328: if (!$@) { 6329: if ($outcome eq 'ok') { 6330: my $result; 6331: foreach my $key (keys(%rules_hash)) { 6332: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&'; 6333: } 6334: $result =~ s/\&$//; 6335: $result .= ':'; 6336: if (@rules_order > 0) { 6337: foreach my $item (@rules_order) { 6338: $result .= &escape($item).'&'; 6339: } 6340: } 6341: $result =~ s/\&$//; 6342: &Reply($client,\$result,$userinput); 6343: } else { 6344: &Reply($client,"error\n", $userinput); 6345: } 6346: } else { 6347: &Failure($client,"unknown_cmd\n",$userinput); 6348: } 6349: } 6350: &register_handler("instidrules",\&get_institutional_id_rules,0,1,0); 6351: 6352: sub get_institutional_selfcreate_rules { 6353: my ($cmd, $tail, $client) = @_; 6354: my $userinput = "$cmd:$tail"; 6355: my $dom = &unescape($tail); 6356: my (%rules_hash,@rules_order); 6357: my $outcome; 6358: eval { 6359: local($SIG{__DIE__})='DEFAULT'; 6360: $outcome = &localenroll::selfcreate_rules($dom,\%rules_hash,\@rules_order); 6361: }; 6362: if (!$@) { 6363: if ($outcome eq 'ok') { 6364: my $result; 6365: foreach my $key (keys(%rules_hash)) { 6366: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&'; 6367: } 6368: $result =~ s/\&$//; 6369: $result .= ':'; 6370: if (@rules_order > 0) { 6371: foreach my $item (@rules_order) { 6372: $result .= &escape($item).'&'; 6373: } 6374: } 6375: $result =~ s/\&$//; 6376: &Reply($client,\$result,$userinput); 6377: } else { 6378: &Reply($client,"error\n", $userinput); 6379: } 6380: } else { 6381: &Failure($client,"unknown_cmd\n",$userinput); 6382: } 6383: } 6384: &register_handler("instemailrules",\&get_institutional_selfcreate_rules,0,1,0); 6385: 6386: 6387: sub institutional_username_check { 6388: my ($cmd, $tail, $client) = @_; 6389: my $userinput = "$cmd:$tail"; 6390: my %rulecheck; 6391: my $outcome; 6392: my ($udom,$uname,@rules) = split(/:/,$tail); 6393: $udom = &unescape($udom); 6394: $uname = &unescape($uname); 6395: @rules = map {&unescape($_);} (@rules); 6396: eval { 6397: local($SIG{__DIE__})='DEFAULT'; 6398: $outcome = &localenroll::username_check($udom,$uname,\@rules,\%rulecheck); 6399: }; 6400: if (!$@) { 6401: if ($outcome eq 'ok') { 6402: my $result=''; 6403: foreach my $key (keys(%rulecheck)) { 6404: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&'; 6405: } 6406: &Reply($client,\$result,$userinput); 6407: } else { 6408: &Reply($client,"error\n", $userinput); 6409: } 6410: } else { 6411: &Failure($client,"unknown_cmd\n",$userinput); 6412: } 6413: } 6414: &register_handler("instrulecheck",\&institutional_username_check,0,1,0); 6415: 6416: sub institutional_id_check { 6417: my ($cmd, $tail, $client) = @_; 6418: my $userinput = "$cmd:$tail"; 6419: my %rulecheck; 6420: my $outcome; 6421: my ($udom,$id,@rules) = split(/:/,$tail); 6422: $udom = &unescape($udom); 6423: $id = &unescape($id); 6424: @rules = map {&unescape($_);} (@rules); 6425: eval { 6426: local($SIG{__DIE__})='DEFAULT'; 6427: $outcome = &localenroll::id_check($udom,$id,\@rules,\%rulecheck); 6428: }; 6429: if (!$@) { 6430: if ($outcome eq 'ok') { 6431: my $result=''; 6432: foreach my $key (keys(%rulecheck)) { 6433: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&'; 6434: } 6435: &Reply($client,\$result,$userinput); 6436: } else { 6437: &Reply($client,"error\n", $userinput); 6438: } 6439: } else { 6440: &Failure($client,"unknown_cmd\n",$userinput); 6441: } 6442: } 6443: &register_handler("instidrulecheck",\&institutional_id_check,0,1,0); 6444: 6445: sub institutional_selfcreate_check { 6446: my ($cmd, $tail, $client) = @_; 6447: my $userinput = "$cmd:$tail"; 6448: my %rulecheck; 6449: my $outcome; 6450: my ($udom,$email,@rules) = split(/:/,$tail); 6451: $udom = &unescape($udom); 6452: $email = &unescape($email); 6453: @rules = map {&unescape($_);} (@rules); 6454: eval { 6455: local($SIG{__DIE__})='DEFAULT'; 6456: $outcome = &localenroll::selfcreate_check($udom,$email,\@rules,\%rulecheck); 6457: }; 6458: if (!$@) { 6459: if ($outcome eq 'ok') { 6460: my $result=''; 6461: foreach my $key (keys(%rulecheck)) { 6462: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&'; 6463: } 6464: &Reply($client,\$result,$userinput); 6465: } else { 6466: &Reply($client,"error\n", $userinput); 6467: } 6468: } else { 6469: &Failure($client,"unknown_cmd\n",$userinput); 6470: } 6471: } 6472: &register_handler("instselfcreatecheck",\&institutional_selfcreate_check,0,1,0); 6473: 6474: # Get domain specific conditions for import of student photographs to a course 6475: # 6476: # Retrieves information from photo_permission subroutine in localenroll. 6477: # Returns outcome (ok) if no processing errors, and whether course owner is 6478: # required to accept conditions of use (yes/no). 6479: # 6480: # 6481: sub photo_permission_handler { 6482: my ($cmd, $tail, $client) = @_; 6483: my $userinput = "$cmd:$tail"; 6484: my $cdom = $tail; 6485: my ($perm_reqd,$conditions); 6486: my $outcome; 6487: eval { 6488: local($SIG{__DIE__})='DEFAULT'; 6489: $outcome = &localenroll::photo_permission($cdom,\$perm_reqd, 6490: \$conditions); 6491: }; 6492: if (!$@) { 6493: &Reply($client, &escape($outcome.':'.$perm_reqd.':'. $conditions)."\n", 6494: $userinput); 6495: } else { 6496: &Failure($client,"unknown_cmd\n",$userinput); 6497: } 6498: return 1; 6499: } 6500: &register_handler("autophotopermission",\&photo_permission_handler,0,1,0); 6501: 6502: # 6503: # Checks if student photo is available for a user in the domain, in the user's 6504: # directory (in /userfiles/internal/studentphoto.jpg). 6505: # Uses localstudentphoto:fetch() to ensure there is an up to date copy of 6506: # the student's photo. 6507: 6508: sub photo_check_handler { 6509: my ($cmd, $tail, $client) = @_; 6510: my $userinput = "$cmd:$tail"; 6511: my ($udom,$uname,$pid) = split(/:/,$tail); 6512: $udom = &unescape($udom); 6513: $uname = &unescape($uname); 6514: $pid = &unescape($pid); 6515: my $path=&propath($udom,$uname).'/userfiles/internal/'; 6516: if (!-e $path) { 6517: &mkpath($path); 6518: } 6519: my $response; 6520: my $result = &localstudentphoto::fetch($udom,$uname,$pid,\$response); 6521: $result .= ':'.$response; 6522: &Reply($client, &escape($result)."\n",$userinput); 6523: return 1; 6524: } 6525: &register_handler("autophotocheck",\&photo_check_handler,0,1,0); 6526: 6527: # 6528: # Retrieve information from localenroll about whether to provide a button 6529: # for users who have enbled import of student photos to initiate an 6530: # update of photo files for registered students. Also include 6531: # comment to display alongside button. 6532: 6533: sub photo_choice_handler { 6534: my ($cmd, $tail, $client) = @_; 6535: my $userinput = "$cmd:$tail"; 6536: my $cdom = &unescape($tail); 6537: my ($update,$comment); 6538: eval { 6539: local($SIG{__DIE__})='DEFAULT'; 6540: ($update,$comment) = &localenroll::manager_photo_update($cdom); 6541: }; 6542: if (!$@) { 6543: &Reply($client,&escape($update).':'.&escape($comment)."\n",$userinput); 6544: } else { 6545: &Failure($client,"unknown_cmd\n",$userinput); 6546: } 6547: return 1; 6548: } 6549: &register_handler("autophotochoice",\&photo_choice_handler,0,1,0); 6550: 6551: # 6552: # Gets a student's photo to exist (in the correct image type) in the user's 6553: # directory. 6554: # Formal Parameters: 6555: # $cmd - The command request that got us dispatched. 6556: # $tail - A colon separated set of words that will be split into: 6557: # $domain - student's domain 6558: # $uname - student username 6559: # $type - image type desired 6560: # $client - The socket open on the client. 6561: # Returns: 6562: # 1 - continue processing. 6563: 6564: sub student_photo_handler { 6565: my ($cmd, $tail, $client) = @_; 6566: my ($domain,$uname,$ext,$type) = split(/:/, $tail); 6567: 6568: my $path=&propath($domain,$uname). '/userfiles/internal/'; 6569: my $filename = 'studentphoto.'.$ext; 6570: if ($type eq 'thumbnail') { 6571: $filename = 'studentphoto_tn.'.$ext; 6572: } 6573: if (-e $path.$filename) { 6574: &Reply($client,"ok\n","$cmd:$tail"); 6575: return 1; 6576: } 6577: &mkpath($path); 6578: my $file; 6579: if ($type eq 'thumbnail') { 6580: eval { 6581: local($SIG{__DIE__})='DEFAULT'; 6582: $file=&localstudentphoto::fetch_thumbnail($domain,$uname); 6583: }; 6584: } else { 6585: $file=&localstudentphoto::fetch($domain,$uname); 6586: } 6587: if (!$file) { 6588: &Failure($client,"unavailable\n","$cmd:$tail"); 6589: return 1; 6590: } 6591: if (!-e $path.$filename) { &convert_photo($file,$path.$filename); } 6592: if (-e $path.$filename) { 6593: &Reply($client,"ok\n","$cmd:$tail"); 6594: return 1; 6595: } 6596: &Failure($client,"unable_to_convert\n","$cmd:$tail"); 6597: return 1; 6598: } 6599: &register_handler("studentphoto", \&student_photo_handler, 0, 1, 0); 6600: 6601: sub inst_usertypes_handler { 6602: my ($cmd, $domain, $client) = @_; 6603: my $res; 6604: my $userinput = $cmd.":".$domain; # For logging purposes. 6605: my (%typeshash,@order,$result); 6606: eval { 6607: local($SIG{__DIE__})='DEFAULT'; 6608: $result=&localenroll::inst_usertypes($domain,\%typeshash,\@order); 6609: }; 6610: if ($result eq 'ok') { 6611: if (keys(%typeshash) > 0) { 6612: foreach my $key (keys(%typeshash)) { 6613: $res.=&escape($key).'='.&escape($typeshash{$key}).'&'; 6614: } 6615: } 6616: $res=~s/\&$//; 6617: $res .= ':'; 6618: if (@order > 0) { 6619: foreach my $item (@order) { 6620: $res .= &escape($item).'&'; 6621: } 6622: } 6623: $res=~s/\&$//; 6624: } 6625: &Reply($client, \$res, $userinput); 6626: return 1; 6627: } 6628: &register_handler("inst_usertypes", \&inst_usertypes_handler, 0, 1, 0); 6629: 6630: # mkpath makes all directories for a file, expects an absolute path with a 6631: # file or a trailing / if just a dir is passed 6632: # returns 1 on success 0 on failure 6633: sub mkpath { 6634: my ($file)=@_; 6635: my @parts=split(/\//,$file,-1); 6636: my $now=$parts[0].'/'.$parts[1].'/'.$parts[2]; 6637: for (my $i=3;$i<= ($#parts-1);$i++) { 6638: $now.='/'.$parts[$i]; 6639: if (!-e $now) { 6640: if (!mkdir($now,0770)) { return 0; } 6641: } 6642: } 6643: return 1; 6644: } 6645: 6646: #--------------------------------------------------------------- 6647: # 6648: # Getting, decoding and dispatching requests: 6649: # 6650: # 6651: # Get a Request: 6652: # Gets a Request message from the client. The transaction 6653: # is defined as a 'line' of text. We remove the new line 6654: # from the text line. 6655: # 6656: sub get_request { 6657: my $input = <$client>; 6658: chomp($input); 6659: 6660: &Debug("get_request: Request = $input\n"); 6661: 6662: &status('Processing '.$clientname.':'.$input); 6663: 6664: return $input; 6665: } 6666: #--------------------------------------------------------------- 6667: # 6668: # Process a request. This sub should shrink as each action 6669: # gets farmed out into a separat sub that is registered 6670: # with the dispatch hash. 6671: # 6672: # Parameters: 6673: # user_input - The request received from the client (lonc). 6674: # 6675: # Returns: 6676: # true to keep processing, false if caller should exit. 6677: # 6678: sub process_request { 6679: my ($userinput) = @_; # Easier for now to break style than to 6680: # fix all the userinput -> user_input. 6681: my $wasenc = 0; # True if request was encrypted. 6682: # ------------------------------------------------------------ See if encrypted 6683: # for command 6684: # sethost:<server> 6685: # <command>:<args> 6686: # we just send it to the processor 6687: # for 6688: # sethost:<server>:<command>:<args> 6689: # we do the implict set host and then do the command 6690: if ($userinput =~ /^sethost:/) { 6691: (my $cmd,my $newid,$userinput) = split(':',$userinput,3); 6692: if (defined($userinput)) { 6693: &sethost("$cmd:$newid"); 6694: } else { 6695: $userinput = "$cmd:$newid"; 6696: } 6697: } 6698: 6699: if ($userinput =~ /^enc/) { 6700: $userinput = decipher($userinput); 6701: $wasenc=1; 6702: if(!$userinput) { # Cipher not defined. 6703: &Failure($client, "error: Encrypted data without negotated key\n"); 6704: return 0; 6705: } 6706: } 6707: Debug("process_request: $userinput\n"); 6708: 6709: # 6710: # The 'correct way' to add a command to lond is now to 6711: # write a sub to execute it and Add it to the command dispatch 6712: # hash via a call to register_handler.. The comments to that 6713: # sub should give you enough to go on to show how to do this 6714: # along with the examples that are building up as this code 6715: # is getting refactored. Until all branches of the 6716: # if/elseif monster below have been factored out into 6717: # separate procesor subs, if the dispatch hash is missing 6718: # the command keyword, we will fall through to the remainder 6719: # of the if/else chain below in order to keep this thing in 6720: # working order throughout the transmogrification. 6721: 6722: my ($command, $tail) = split(/:/, $userinput, 2); 6723: chomp($command); 6724: chomp($tail); 6725: $tail =~ s/(\r)//; # This helps people debugging with e.g. telnet. 6726: $command =~ s/(\r)//; # And this too for parameterless commands. 6727: if(!$tail) { 6728: $tail =""; # defined but blank. 6729: } 6730: 6731: &Debug("Command received: $command, encoded = $wasenc"); 6732: 6733: if(defined $Dispatcher{$command}) { 6734: 6735: my $dispatch_info = $Dispatcher{$command}; 6736: my $handler = $$dispatch_info[0]; 6737: my $need_encode = $$dispatch_info[1]; 6738: my $client_types = $$dispatch_info[2]; 6739: Debug("Matched dispatch hash: mustencode: $need_encode " 6740: ."ClientType $client_types"); 6741: 6742: # Validate the request: 6743: 6744: my $ok = 1; 6745: my $requesterprivs = 0; 6746: if(&isClient()) { 6747: $requesterprivs |= $CLIENT_OK; 6748: } 6749: if(&isManager()) { 6750: $requesterprivs |= $MANAGER_OK; 6751: } 6752: if($need_encode && (!$wasenc)) { 6753: Debug("Must encode but wasn't: $need_encode $wasenc"); 6754: $ok = 0; 6755: } 6756: if(($client_types & $requesterprivs) == 0) { 6757: Debug("Client not privileged to do this operation"); 6758: $ok = 0; 6759: } 6760: if ($ok) { 6761: my $realcommand = $command; 6762: if ($command eq 'querysend') { 6763: my ($query,$rest)=split(/\:/,$tail,2); 6764: $query=~s/\n*$//g; 6765: my @possqueries = 6766: qw(userlog courselog fetchenrollment institutionalphotos usersearch instdirsearch getinstuser getmultinstusers); 6767: if (grep(/^\Q$query\E$/,@possqueries)) { 6768: $command .= '_'.$query; 6769: } elsif ($query eq 'prepare activity log') { 6770: $command .= '_activitylog'; 6771: } 6772: } 6773: if (ref($trust{$command}) eq 'HASH') { 6774: my $donechecks; 6775: if ($trust{$command}{'anywhere'}) { 6776: $donechecks = 1; 6777: } elsif ($trust{$command}{'manageronly'}) { 6778: unless (&isManager()) { 6779: $ok = 0; 6780: } 6781: $donechecks = 1; 6782: } elsif ($trust{$command}{'institutiononly'}) { 6783: unless ($clientsameinst) { 6784: $ok = 0; 6785: } 6786: $donechecks = 1; 6787: } elsif ($clientsameinst) { 6788: $donechecks = 1; 6789: } 6790: unless ($donechecks) { 6791: foreach my $rule (keys(%{$trust{$command}})) { 6792: next if ($rule eq 'remote'); 6793: if ($trust{$command}{$rule}) { 6794: if ($clientprohibited{$rule}) { 6795: $ok = 0; 6796: } else { 6797: $ok = 1; 6798: $donechecks = 1; 6799: last; 6800: } 6801: } 6802: } 6803: } 6804: unless ($donechecks) { 6805: if ($trust{$command}{'remote'}) { 6806: if ($clientremoteok) { 6807: $ok = 1; 6808: } else { 6809: $ok = 0; 6810: } 6811: } 6812: } 6813: } 6814: $command = $realcommand; 6815: } 6816: 6817: if($ok) { 6818: Debug("Dispatching to handler $command $tail"); 6819: my $keep_going = &$handler($command, $tail, $client); 6820: return $keep_going; 6821: } else { 6822: Debug("Refusing to dispatch because client did not match requirements"); 6823: Failure($client, "refused\n", $userinput); 6824: return 1; 6825: } 6826: } 6827: 6828: print $client "unknown_cmd\n"; 6829: # -------------------------------------------------------------------- complete 6830: Debug("process_request - returning 1"); 6831: return 1; 6832: } 6833: # 6834: # Decipher encoded traffic 6835: # Parameters: 6836: # input - Encoded data. 6837: # Returns: 6838: # Decoded data or undef if encryption key was not yet negotiated. 6839: # Implicit input: 6840: # cipher - This global holds the negotiated encryption key. 6841: # 6842: sub decipher { 6843: my ($input) = @_; 6844: my $output = ''; 6845: 6846: 6847: if($cipher) { 6848: my($enc, $enclength, $encinput) = split(/:/, $input); 6849: for(my $encidx = 0; $encidx < length($encinput); $encidx += 16) { 6850: $output .= 6851: $cipher->decrypt(pack("H16", substr($encinput, $encidx, 16))); 6852: } 6853: return substr($output, 0, $enclength); 6854: } else { 6855: return undef; 6856: } 6857: } 6858: 6859: # 6860: # Register a command processor. This function is invoked to register a sub 6861: # to process a request. Once registered, the ProcessRequest sub can automatically 6862: # dispatch requests to an appropriate sub, and do the top level validity checking 6863: # as well: 6864: # - Is the keyword recognized. 6865: # - Is the proper client type attempting the request. 6866: # - Is the request encrypted if it has to be. 6867: # Parameters: 6868: # $request_name - Name of the request being registered. 6869: # This is the command request that will match 6870: # against the hash keywords to lookup the information 6871: # associated with the dispatch information. 6872: # $procedure - Reference to a sub to call to process the request. 6873: # All subs get called as follows: 6874: # Procedure($cmd, $tail, $replyfd, $key) 6875: # $cmd - the actual keyword that invoked us. 6876: # $tail - the tail of the request that invoked us. 6877: # $replyfd- File descriptor connected to the client 6878: # $must_encode - True if the request must be encoded to be good. 6879: # $client_ok - True if it's ok for a client to request this. 6880: # $manager_ok - True if it's ok for a manager to request this. 6881: # Side effects: 6882: # - On success, the Dispatcher hash has an entry added for the key $RequestName 6883: # - On failure, the program will die as it's a bad internal bug to try to 6884: # register a duplicate command handler. 6885: # 6886: sub register_handler { 6887: my ($request_name,$procedure,$must_encode, $client_ok,$manager_ok) = @_; 6888: 6889: # Don't allow duplication# 6890: 6891: if (defined $Dispatcher{$request_name}) { 6892: die "Attempting to define a duplicate request handler for $request_name\n"; 6893: } 6894: # Build the client type mask: 6895: 6896: my $client_type_mask = 0; 6897: if($client_ok) { 6898: $client_type_mask |= $CLIENT_OK; 6899: } 6900: if($manager_ok) { 6901: $client_type_mask |= $MANAGER_OK; 6902: } 6903: 6904: # Enter the hash: 6905: 6906: my @entry = ($procedure, $must_encode, $client_type_mask); 6907: 6908: $Dispatcher{$request_name} = \@entry; 6909: 6910: } 6911: 6912: 6913: #------------------------------------------------------------------ 6914: 6915: 6916: 6917: 6918: # 6919: # Convert an error return code from lcpasswd to a string value. 6920: # 6921: sub lcpasswdstrerror { 6922: my $ErrorCode = shift; 6923: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) { 6924: return "lcpasswd Unrecognized error return value ".$ErrorCode; 6925: } else { 6926: return $passwderrors[$ErrorCode]; 6927: } 6928: } 6929: 6930: # grabs exception and records it to log before exiting 6931: sub catchexception { 6932: my ($error)=@_; 6933: $SIG{'QUIT'}='DEFAULT'; 6934: $SIG{__DIE__}='DEFAULT'; 6935: &status("Catching exception"); 6936: &logthis("CRITICAL: " 6937: ."ABNORMAL EXIT. Child $$ for server ".$perlvar{'lonHostID'}." died through " 6938: ."a crash with this error msg->[$error]"); 6939: &logthis('Famous last words: '.$status.' - '.$lastlog); 6940: if ($client) { print $client "error: $error\n"; } 6941: $server->close(); 6942: die($error); 6943: } 6944: sub timeout { 6945: &status("Handling Timeout"); 6946: &logthis("CRITICAL: TIME OUT ".$$.""); 6947: &catchexception('Timeout'); 6948: } 6949: # -------------------------------- Set signal handlers to record abnormal exits 6950: 6951: 6952: $SIG{'QUIT'}=\&catchexception; 6953: $SIG{__DIE__}=\&catchexception; 6954: 6955: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf 6956: &status("Read loncapa.conf and loncapa_apache.conf"); 6957: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf'); 6958: %perlvar=%{$perlvarref}; 6959: undef $perlvarref; 6960: 6961: # ----------------------------- Make sure this process is running from user=www 6962: my $wwwid=getpwnam('www'); 6963: if ($wwwid!=$<) { 6964: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}"; 6965: my $subj="LON: $currenthostid User ID mismatch"; 6966: system("echo 'User ID mismatch. lond must be run as user www.' |". 6967: " mail -s '$subj' $emailto > /dev/null"); 6968: exit 1; 6969: } 6970: 6971: # --------------------------------------------- Check if other instance running 6972: 6973: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid"; 6974: 6975: if (-e $pidfile) { 6976: my $lfh=IO::File->new("$pidfile"); 6977: my $pide=<$lfh>; 6978: chomp($pide); 6979: if (kill 0 => $pide) { die "already running"; } 6980: } 6981: 6982: # ------------------------------------------------------------- Read hosts file 6983: 6984: 6985: 6986: # establish SERVER socket, bind and listen. 6987: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'}, 6988: Type => SOCK_STREAM, 6989: Proto => 'tcp', 6990: ReuseAddr => 1, 6991: Listen => 10 ) 6992: or die "making socket: $@\n"; 6993: 6994: # --------------------------------------------------------- Do global variables 6995: 6996: # global variables 6997: 6998: my %children = (); # keys are current child process IDs 6999: 7000: sub REAPER { # takes care of dead children 7001: $SIG{CHLD} = \&REAPER; 7002: &status("Handling child death"); 7003: my $pid; 7004: do { 7005: $pid = waitpid(-1,&WNOHANG()); 7006: if (defined($children{$pid})) { 7007: &logthis("Child $pid died"); 7008: delete($children{$pid}); 7009: } elsif ($pid > 0) { 7010: &logthis("Unknown Child $pid died"); 7011: } 7012: } while ( $pid > 0 ); 7013: foreach my $child (keys(%children)) { 7014: $pid = waitpid($child,&WNOHANG()); 7015: if ($pid > 0) { 7016: &logthis("Child $child - $pid looks like we missed it's death"); 7017: delete($children{$pid}); 7018: } 7019: } 7020: &status("Finished Handling child death"); 7021: } 7022: 7023: sub HUNTSMAN { # signal handler for SIGINT 7024: &status("Killing children (INT)"); 7025: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children 7026: kill 'INT' => keys %children; 7027: &logthis("Free socket: ".shutdown($server,2)); # free up socket 7028: my $execdir=$perlvar{'lonDaemons'}; 7029: unlink("$execdir/logs/lond.pid"); 7030: &logthis("CRITICAL: Shutting down"); 7031: &status("Done killing children"); 7032: exit; # clean up with dignity 7033: } 7034: 7035: sub HUPSMAN { # signal handler for SIGHUP 7036: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children 7037: &status("Killing children for restart (HUP)"); 7038: kill 'INT' => keys %children; 7039: &logthis("Free socket: ".shutdown($server,2)); # free up socket 7040: &logthis("CRITICAL: Restarting"); 7041: my $execdir=$perlvar{'lonDaemons'}; 7042: unlink("$execdir/logs/lond.pid"); 7043: &status("Restarting self (HUP)"); 7044: exec("$execdir/lond"); # here we go again 7045: } 7046: 7047: # 7048: # Reload the Apache daemon's state. 7049: # This is done by invoking /home/httpd/perl/apachereload 7050: # a setuid perl script that can be root for us to do this job. 7051: # 7052: sub ReloadApache { 7053: # --------------------------- Handle case of another apachereload process (locking) 7054: if (&LONCAPA::try_to_lock('/tmp/lock_apachereload')) { 7055: my $execdir = $perlvar{'lonDaemons'}; 7056: my $script = $execdir."/apachereload"; 7057: system($script); 7058: unlink('/tmp/lock_apachereload'); # Remove the lock file. 7059: } 7060: } 7061: 7062: # 7063: # Called in response to a USR2 signal. 7064: # - Reread hosts.tab 7065: # - All children connected to hosts that were removed from hosts.tab 7066: # are killed via SIGINT 7067: # - All children connected to previously existing hosts are sent SIGUSR1 7068: # - Our internal hosts hash is updated to reflect the new contents of 7069: # hosts.tab causing connections from hosts added to hosts.tab to 7070: # now be honored. 7071: # 7072: sub UpdateHosts { 7073: &status("Reload hosts.tab"); 7074: logthis(' Updating connections '); 7075: # 7076: # The %children hash has the set of IP's we currently have children 7077: # on. These need to be matched against records in the hosts.tab 7078: # Any ip's no longer in the table get killed off they correspond to 7079: # either dropped or changed hosts. Note that the re-read of the table 7080: # will take care of new and changed hosts as connections come into being. 7081: 7082: &Apache::lonnet::reset_hosts_info(); 7083: my %active; 7084: 7085: foreach my $child (keys(%children)) { 7086: my $childip = $children{$child}; 7087: if ($childip ne '127.0.0.1' 7088: && !defined(&Apache::lonnet::get_hosts_from_ip($childip))) { 7089: logthis(' UpdateHosts killing child ' 7090: ." $child for ip $childip "); 7091: kill('INT', $child); 7092: } else { 7093: $active{$child} = $childip; 7094: logthis(' keeping child for ip ' 7095: ." $childip (pid=$child) "); 7096: } 7097: } 7098: 7099: my %oldconf = %secureconf; 7100: my %connchange; 7101: if (lonssl::Read_Connect_Config(\%secureconf,\%crlchecked,\%perlvar) eq 'ok') { 7102: logthis(' Reloaded SSL connection rules and cleared CRL checking history '); 7103: } else { 7104: logthis(' Failed to reload SSL connection rules and clear CRL checking history '); 7105: } 7106: if ((ref($oldconf{'connfrom'}) eq 'HASH') && (ref($secureconf{'connfrom'}) eq 'HASH')) { 7107: foreach my $type ('dom','intdom','other') { 7108: if ((($oldconf{'connfrom'}{$type} eq 'no') && ($secureconf{'connfrom'}{$type} eq 'req')) || 7109: (($oldconf{'connfrom'}{$type} eq 'req') && ($secureconf{'connfrom'}{$type} eq 'no'))) { 7110: $connchange{$type} = 1; 7111: } 7112: } 7113: } 7114: if (keys(%connchange)) { 7115: foreach my $child (keys(%active)) { 7116: my $childip = $active{$child}; 7117: if ($childip ne '127.0.0.1') { 7118: my $childhostname = gethostbyaddr(Socket::inet_aton($childip),AF_INET); 7119: if ($childhostname ne '') { 7120: my $childlonhost = &Apache::lonnet::get_server_homeID($childhostname); 7121: my ($samedom,$sameinst) = &set_client_info($childlonhost); 7122: if ($samedom) { 7123: if ($connchange{'dom'}) { 7124: logthis(' UpdateHosts killing child ' 7125: ." $child for ip $childip "); 7126: kill('INT', $child); 7127: } 7128: } elsif ($sameinst) { 7129: if ($connchange{'intdom'}) { 7130: logthis(' UpdateHosts killing child ' 7131: ." $child for ip $childip "); 7132: kill('INT', $child); 7133: } 7134: } else { 7135: if ($connchange{'other'}) { 7136: logthis(' UpdateHosts killing child ' 7137: ." $child for ip $childip "); 7138: kill('INT', $child); 7139: } 7140: } 7141: } 7142: } 7143: } 7144: } 7145: ReloadApache; 7146: &status("Finished reloading hosts.tab"); 7147: } 7148: 7149: sub checkchildren { 7150: &status("Checking on the children (sending signals)"); 7151: &initnewstatus(); 7152: &logstatus(); 7153: &logthis('Going to check on the children'); 7154: my $docdir=$perlvar{'lonDocRoot'}; 7155: foreach (sort keys %children) { 7156: #sleep 1; 7157: unless (kill 'USR1' => $_) { 7158: &logthis ('Child '.$_.' is dead'); 7159: &logstatus($$.' is dead'); 7160: delete($children{$_}); 7161: } 7162: } 7163: sleep 5; 7164: $SIG{ALRM} = sub { Debug("timeout"); 7165: die "timeout"; }; 7166: $SIG{__DIE__} = 'DEFAULT'; 7167: &status("Checking on the children (waiting for reports)"); 7168: foreach (sort keys %children) { 7169: unless (-e "$docdir/lon-status/londchld/$_.txt") { 7170: eval { 7171: alarm(300); 7172: &logthis('Child '.$_.' did not respond'); 7173: kill 9 => $_; 7174: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}"; 7175: #$subj="LON: $currenthostid killed lond process $_"; 7176: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`; 7177: #$execdir=$perlvar{'lonDaemons'}; 7178: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`; 7179: delete($children{$_}); 7180: alarm(0); 7181: } 7182: } 7183: } 7184: $SIG{ALRM} = 'DEFAULT'; 7185: $SIG{__DIE__} = \&catchexception; 7186: &status("Finished checking children"); 7187: &logthis('Finished Checking children'); 7188: } 7189: 7190: # --------------------------------------------------------------------- Logging 7191: 7192: sub logthis { 7193: my $message=shift; 7194: my $execdir=$perlvar{'lonDaemons'}; 7195: my $fh=IO::File->new(">>$execdir/logs/lond.log"); 7196: my $now=time; 7197: my $local=localtime($now); 7198: $lastlog=$local.': '.$message; 7199: print $fh "$local ($$): $message\n"; 7200: } 7201: 7202: # ------------------------- Conditional log if $DEBUG true. 7203: sub Debug { 7204: my $message = shift; 7205: if($DEBUG) { 7206: &logthis($message); 7207: } 7208: } 7209: 7210: # 7211: # Sub to do replies to client.. this gives a hook for some 7212: # debug tracing too: 7213: # Parameters: 7214: # fd - File open on client. 7215: # reply - Text to send to client. 7216: # request - Original request from client. 7217: # 7218: #NOTE $reply must be terminated by exactly *one* \n. If $reply is a reference 7219: #this is done automatically ($$reply must not contain any \n in this case). 7220: #If $reply is a string the caller has to ensure this. 7221: sub Reply { 7222: my ($fd, $reply, $request) = @_; 7223: if (ref($reply)) { 7224: print $fd $$reply; 7225: print $fd "\n"; 7226: if ($DEBUG) { Debug("Request was $request Reply was $$reply"); } 7227: } else { 7228: print $fd $reply; 7229: if ($DEBUG) { Debug("Request was $request Reply was $reply"); } 7230: } 7231: $Transactions++; 7232: } 7233: 7234: 7235: # 7236: # Sub to report a failure. 7237: # This function: 7238: # - Increments the failure statistic counters. 7239: # - Invokes Reply to send the error message to the client. 7240: # Parameters: 7241: # fd - File descriptor open on the client 7242: # reply - Reply text to emit. 7243: # request - The original request message (used by Reply 7244: # to debug if that's enabled. 7245: # Implicit outputs: 7246: # $Failures- The number of failures is incremented. 7247: # Reply (invoked here) sends a message to the 7248: # client: 7249: # 7250: sub Failure { 7251: my $fd = shift; 7252: my $reply = shift; 7253: my $request = shift; 7254: 7255: $Failures++; 7256: Reply($fd, $reply, $request); # That's simple eh? 7257: } 7258: # ------------------------------------------------------------------ Log status 7259: 7260: sub logstatus { 7261: &status("Doing logging"); 7262: my $docdir=$perlvar{'lonDocRoot'}; 7263: { 7264: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt"); 7265: print $fh $status."\n".$lastlog."\n".time."\n$keymode"; 7266: $fh->close(); 7267: } 7268: &status("Finished $$.txt"); 7269: { 7270: open(LOG,">>$docdir/lon-status/londstatus.txt"); 7271: flock(LOG,LOCK_EX); 7272: print LOG $$."\t".$clientname."\t".$currenthostid."\t" 7273: .$status."\t".$lastlog."\t $keymode\n"; 7274: flock(LOG,LOCK_UN); 7275: close(LOG); 7276: } 7277: &status("Finished logging"); 7278: } 7279: 7280: sub initnewstatus { 7281: my $docdir=$perlvar{'lonDocRoot'}; 7282: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt"); 7283: my $now=time(); 7284: my $local=localtime($now); 7285: print $fh "LOND status $local - parent $$\n\n"; 7286: opendir(DIR,"$docdir/lon-status/londchld"); 7287: while (my $filename=readdir(DIR)) { 7288: unlink("$docdir/lon-status/londchld/$filename"); 7289: } 7290: closedir(DIR); 7291: } 7292: 7293: # -------------------------------------------------------------- Status setting 7294: 7295: sub status { 7296: my $what=shift; 7297: my $now=time; 7298: my $local=localtime($now); 7299: $status=$local.': '.$what; 7300: $0='lond: '.$what.' '.$local; 7301: } 7302: 7303: # -------------------------------------------------------------- Talk to lonsql 7304: 7305: sub sql_reply { 7306: my ($cmd)=@_; 7307: my $answer=&sub_sql_reply($cmd); 7308: if ($answer eq 'con_lost') { $answer=&sub_sql_reply($cmd); } 7309: return $answer; 7310: } 7311: 7312: sub sub_sql_reply { 7313: my ($cmd)=@_; 7314: my $unixsock="mysqlsock"; 7315: my $peerfile="$perlvar{'lonSockDir'}/$unixsock"; 7316: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile", 7317: Type => SOCK_STREAM, 7318: Timeout => 10) 7319: or return "con_lost"; 7320: print $sclient "$cmd:$currentdomainid\n"; 7321: my $answer=<$sclient>; 7322: chomp($answer); 7323: if (!$answer) { $answer="con_lost"; } 7324: return $answer; 7325: } 7326: 7327: # --------------------------------------- Is this the home server of an author? 7328: 7329: sub ishome { 7330: my $author=shift; 7331: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/; 7332: my ($udom,$uname)=split(/\//,$author); 7333: my $proname=propath($udom,$uname); 7334: if (-e $proname) { 7335: return 'owner'; 7336: } else { 7337: return 'not_owner'; 7338: } 7339: } 7340: 7341: # ======================================================= Continue main program 7342: # ---------------------------------------------------- Fork once and dissociate 7343: 7344: my $fpid=fork; 7345: exit if $fpid; 7346: die "Couldn't fork: $!" unless defined ($fpid); 7347: 7348: POSIX::setsid() or die "Can't start new session: $!"; 7349: 7350: # ------------------------------------------------------- Write our PID on disk 7351: 7352: my $execdir=$perlvar{'lonDaemons'}; 7353: open (PIDSAVE,">$execdir/logs/lond.pid"); 7354: print PIDSAVE "$$\n"; 7355: close(PIDSAVE); 7356: &logthis("CRITICAL: ---------- Starting ----------"); 7357: &status('Starting'); 7358: 7359: 7360: 7361: # ----------------------------------------------------- Install signal handlers 7362: 7363: 7364: $SIG{CHLD} = \&REAPER; 7365: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN; 7366: $SIG{HUP} = \&HUPSMAN; 7367: $SIG{USR1} = \&checkchildren; 7368: $SIG{USR2} = \&UpdateHosts; 7369: 7370: # Read the host hashes: 7371: &Apache::lonnet::load_hosts_tab(); 7372: my %iphost = &Apache::lonnet::get_iphost(1); 7373: 7374: $dist=`$perlvar{'lonDaemons'}/distprobe`; 7375: 7376: my $arch = `uname -i`; 7377: chomp($arch); 7378: if ($arch eq 'unknown') { 7379: $arch = `uname -m`; 7380: chomp($arch); 7381: } 7382: 7383: unless (lonssl::Read_Connect_Config(\%secureconf,\%crlchecked,\%perlvar) eq 'ok') { 7384: &logthis('No connectionrules table. Will fallback to loncapa.conf'); 7385: } 7386: 7387: # -------------------------------------------------------------- 7388: # Accept connections. When a connection comes in, it is validated 7389: # and if good, a child process is created to process transactions 7390: # along the connection. 7391: 7392: while (1) { 7393: &status('Starting accept'); 7394: $client = $server->accept() or next; 7395: &status('Accepted '.$client.' off to spawn'); 7396: make_new_child($client); 7397: &status('Finished spawning'); 7398: } 7399: 7400: sub make_new_child { 7401: my $pid; 7402: # my $cipher; # Now global 7403: my $sigset; 7404: 7405: $client = shift; 7406: &status('Starting new child '.$client); 7407: &logthis(' Attempting to start child ('.$client. 7408: ")"); 7409: # block signal for fork 7410: $sigset = POSIX::SigSet->new(SIGINT); 7411: sigprocmask(SIG_BLOCK, $sigset) 7412: or die "Can't block SIGINT for fork: $!\n"; 7413: 7414: die "fork: $!" unless defined ($pid = fork); 7415: 7416: $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of 7417: # connection liveness. 7418: 7419: # 7420: # Figure out who we're talking to so we can record the peer in 7421: # the pid hash. 7422: # 7423: my $caller = getpeername($client); 7424: my ($port,$iaddr); 7425: if (defined($caller) && length($caller) > 0) { 7426: ($port,$iaddr)=unpack_sockaddr_in($caller); 7427: } else { 7428: &logthis("Unable to determine who caller was, getpeername returned nothing"); 7429: } 7430: if (defined($iaddr)) { 7431: $clientip = inet_ntoa($iaddr); 7432: Debug("Connected with $clientip"); 7433: } else { 7434: &logthis("Unable to determine clientip"); 7435: $clientip='Unavailable'; 7436: } 7437: 7438: if ($pid) { 7439: # Parent records the child's birth and returns. 7440: sigprocmask(SIG_UNBLOCK, $sigset) 7441: or die "Can't unblock SIGINT for fork: $!\n"; 7442: $children{$pid} = $clientip; 7443: &status('Started child '.$pid); 7444: close($client); 7445: return; 7446: } else { 7447: # Child can *not* return from this subroutine. 7448: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before 7449: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns 7450: #don't get intercepted 7451: $SIG{USR1}= \&logstatus; 7452: $SIG{ALRM}= \&timeout; 7453: # 7454: # Block sigpipe as it gets thrownon socket disconnect and we want to 7455: # deal with that as a read faiure instead. 7456: # 7457: my $blockset = POSIX::SigSet->new(SIGPIPE); 7458: sigprocmask(SIG_BLOCK, $blockset); 7459: 7460: $lastlog='Forked '; 7461: $status='Forked'; 7462: 7463: # unblock signals 7464: sigprocmask(SIG_UNBLOCK, $sigset) 7465: or die "Can't unblock SIGINT for fork: $!\n"; 7466: 7467: # my $tmpsnum=0; # Now global 7468: #---------------------------------------------------- kerberos 5 initialization 7469: &Authen::Krb5::init_context(); 7470: 7471: my $no_ets; 7472: if ($dist =~ /^(?:centos|rhes|scientific)(\d+)$/) { 7473: if ($1 >= 7) { 7474: $no_ets = 1; 7475: } 7476: } elsif ($dist =~ /^suse(\d+\.\d+)$/) { 7477: if (($1 eq '9.3') || ($1 >= 12.2)) { 7478: $no_ets = 1; 7479: } 7480: } elsif ($dist =~ /^sles(\d+)$/) { 7481: if ($1 > 11) { 7482: $no_ets = 1; 7483: } 7484: } elsif ($dist =~ /^fedora(\d+)$/) { 7485: if ($1 < 7) { 7486: $no_ets = 1; 7487: } 7488: } 7489: unless ($no_ets) { 7490: &Authen::Krb5::init_ets(); 7491: } 7492: 7493: &status('Accepted connection'); 7494: # ============================================================================= 7495: # do something with the connection 7496: # ----------------------------------------------------------------------------- 7497: # see if we know client and 'check' for spoof IP by ineffective challenge 7498: 7499: my $outsideip=$clientip; 7500: if ($clientip eq '127.0.0.1') { 7501: $outsideip=&Apache::lonnet::get_host_ip($perlvar{'lonHostID'}); 7502: } 7503: &ReadManagerTable(); 7504: my $clientrec=defined(&Apache::lonnet::get_hosts_from_ip($outsideip)); 7505: my $ismanager=($managers{$outsideip} ne undef); 7506: $clientname = "[unknown]"; 7507: if($clientrec) { # Establish client type. 7508: $ConnectionType = "client"; 7509: $clientname = (&Apache::lonnet::get_hosts_from_ip($outsideip))[-1]; 7510: if($ismanager) { 7511: $ConnectionType = "both"; 7512: } 7513: } else { 7514: $ConnectionType = "manager"; 7515: $clientname = $managers{$outsideip}; 7516: } 7517: my ($clientok,$clientinfoset); 7518: 7519: if ($clientrec || $ismanager) { 7520: &status("Waiting for init from $clientip $clientname"); 7521: &logthis('INFO: Connection, '. 7522: $clientip. 7523: " ($clientname) connection type = $ConnectionType " ); 7524: &status("Connecting $clientip ($clientname))"); 7525: my $remotereq=<$client>; 7526: chomp($remotereq); 7527: Debug("Got init: $remotereq"); 7528: 7529: if ($remotereq =~ /^init/) { 7530: &sethost("sethost:$perlvar{'lonHostID'}"); 7531: # 7532: # If the remote is attempting a local init... give that a try: 7533: # 7534: (my $i, my $inittype, $clientversion) = split(/:/, $remotereq); 7535: # For LON-CAPA 2.9, the client session will have sent its LON-CAPA 7536: # version when initiating the connection. For LON-CAPA 2.8 and older, 7537: # the version is retrieved from the global %loncaparevs in lonnet.pm. 7538: # $clientversion contains path to keyfile if $inittype eq 'local' 7539: # it's overridden below in this case 7540: $clientversion ||= $Apache::lonnet::loncaparevs{$clientname}; 7541: 7542: # If the connection type is ssl, but I didn't get my 7543: # certificate files yet, then I'll drop back to 7544: # insecure (if allowed). 7545: 7546: if ($inittype eq "ssl") { 7547: my $context; 7548: if ($clientsamedom) { 7549: $context = 'dom'; 7550: if ($secureconf{'connfrom'}{'dom'} eq 'no') { 7551: $inittype = ""; 7552: } 7553: } elsif ($clientsameinst) { 7554: $context = 'intdom'; 7555: if ($secureconf{'connfrom'}{'intdom'} eq 'no') { 7556: $inittype = ""; 7557: } 7558: } else { 7559: $context = 'other'; 7560: if ($secureconf{'connfrom'}{'other'} eq 'no') { 7561: $inittype = ""; 7562: } 7563: } 7564: if ($inittype eq '') { 7565: &logthis(" Domain config set " 7566: ."to no ssl for $clientname (context: $context)" 7567: ." -- trying insecure auth"); 7568: } 7569: } 7570: 7571: if($inittype eq "ssl") { 7572: my ($ca, $cert) = lonssl::CertificateFile; 7573: my $kfile = lonssl::KeyFile; 7574: if((!$ca) || 7575: (!$cert) || 7576: (!$kfile)) { 7577: $inittype = ""; # This forces insecure attempt. 7578: &logthis(" Certificates not " 7579: ."installed -- trying insecure auth"); 7580: } else { # SSL certificates are in place so 7581: } # Leave the inittype alone. 7582: } 7583: 7584: if($inittype eq "local") { 7585: $clientversion = $perlvar{'lonVersion'}; 7586: my $key = LocalConnection($client, $remotereq); 7587: if($key) { 7588: Debug("Got local key $key"); 7589: $clientok = 1; 7590: my $cipherkey = pack("H32", $key); 7591: $cipher = new IDEA($cipherkey); 7592: print $client "ok:local\n"; 7593: &logthis('' 7594: . "Successful local authentication "); 7595: $keymode = "local" 7596: } else { 7597: Debug("Failed to get local key"); 7598: $clientok = 0; 7599: shutdown($client, 3); 7600: close $client; 7601: } 7602: } elsif ($inittype eq "ssl") { 7603: my $key = SSLConnection($client,$clientname); 7604: if ($key) { 7605: $clientok = 1; 7606: my $cipherkey = pack("H32", $key); 7607: $cipher = new IDEA($cipherkey); 7608: &logthis('' 7609: ."Successfull ssl authentication with $clientname "); 7610: $keymode = "ssl"; 7611: 7612: } else { 7613: $clientok = 0; 7614: close $client; 7615: } 7616: 7617: } else { 7618: $clientinfoset = &set_client_info(); 7619: my $ok = InsecureConnection($client); 7620: if($ok) { 7621: $clientok = 1; 7622: &logthis('' 7623: ."Successful insecure authentication with $clientname "); 7624: print $client "ok\n"; 7625: $keymode = "insecure"; 7626: } else { 7627: &logthis('' 7628: ."Attempted insecure connection disallowed "); 7629: close $client; 7630: $clientok = 0; 7631: } 7632: } 7633: } else { 7634: &logthis( 7635: "WARNING: " 7636: ."$clientip failed to initialize: >$remotereq< "); 7637: &status('No init '.$clientip); 7638: } 7639: } else { 7640: &logthis( 7641: "WARNING: Unknown client $clientip"); 7642: &status('Hung up on '.$clientip); 7643: } 7644: 7645: if ($clientok) { 7646: # ---------------- New known client connecting, could mean machine online again 7647: if (&Apache::lonnet::get_host_ip($currenthostid) ne $clientip 7648: && $clientip ne '127.0.0.1') { 7649: &Apache::lonnet::reconlonc($clientname); 7650: } 7651: &logthis("Established connection: $clientname"); 7652: &status('Will listen to '.$clientname); 7653: # ------------------------------------------------------------ Process requests 7654: my $keep_going = 1; 7655: my $user_input; 7656: unless ($clientinfoset) { 7657: $clientinfoset = &set_client_info(); 7658: } 7659: $clientremoteok = 0; 7660: unless ($clientsameinst) { 7661: $clientremoteok = 1; 7662: my $defdom = &Apache::lonnet::host_domain($perlvar{'lonHostID'}); 7663: %clientprohibited = &get_prohibited($defdom); 7664: if ($clientintdom) { 7665: my $remsessconf = &get_usersession_config($defdom,'remotesession'); 7666: if (ref($remsessconf) eq 'HASH') { 7667: if (ref($remsessconf->{'remote'}) eq 'HASH') { 7668: if (ref($remsessconf->{'remote'}->{'excludedomain'}) eq 'ARRAY') { 7669: if (grep(/^\Q$clientintdom\E$/,@{$remsessconf->{'remote'}->{'excludedomain'}})) { 7670: $clientremoteok = 0; 7671: } 7672: } 7673: if (ref($remsessconf->{'remote'}->{'includedomain'}) eq 'ARRAY') { 7674: if (grep(/^\Q$clientintdom\E$/,@{$remsessconf->{'remote'}->{'includedomain'}})) { 7675: $clientremoteok = 1; 7676: } else { 7677: $clientremoteok = 0; 7678: } 7679: } 7680: } 7681: } 7682: } 7683: } 7684: while(($user_input = get_request) && $keep_going) { 7685: alarm(120); 7686: Debug("Main: Got $user_input\n"); 7687: $keep_going = &process_request($user_input); 7688: alarm(0); 7689: &status('Listening to '.$clientname." ($keymode)"); 7690: } 7691: 7692: # --------------------------------------------- client unknown or fishy, refuse 7693: } else { 7694: print $client "refused\n"; 7695: $client->close(); 7696: &logthis("WARNING: " 7697: ."Rejected client $clientip, closing connection"); 7698: } 7699: } 7700: 7701: # ============================================================================= 7702: 7703: &logthis("CRITICAL: " 7704: ."Disconnect from $clientip ($clientname)"); 7705: 7706: 7707: # this exit is VERY important, otherwise the child will become 7708: # a producer of more and more children, forking yourself into 7709: # process death. 7710: exit; 7711: 7712: } 7713: 7714: # 7715: # Used to determine if a particular client is from the same domain 7716: # as the current server, or from the same internet domain. 7717: # 7718: # Optional input -- the client to check for domain and internet domain. 7719: # If not specified, defaults to the package variable: $clientname 7720: # 7721: # If called in array context will not set package variables, but will 7722: # instead return an array of two values - (a) true if client is in the 7723: # same domain as the server, and (b) true if client is in the same internet 7724: # domain. 7725: # 7726: # If called in scalar context, sets package variables for current client: 7727: # 7728: # $clienthomedom - LonCAPA domain of homeID for client. 7729: # $clientsamedom - LonCAPA domain same for this host and client. 7730: # $clientintdom - LonCAPA "internet domain" for client. 7731: # $clientsameinst - LonCAPA "internet domain" same for this host & client. 7732: # 7733: # returns 1 to indicate package variables have been set for current client. 7734: # 7735: 7736: sub set_client_info { 7737: my ($lonhost) = @_; 7738: $lonhost ||= $clientname; 7739: my $clienthost = &Apache::lonnet::hostname($lonhost); 7740: my $clientserverhomeID = &Apache::lonnet::get_server_homeID($clienthost); 7741: my $homedom = &Apache::lonnet::host_domain($clientserverhomeID); 7742: my $samedom = 0; 7743: if ($perlvar{'lonDefDom'} eq $homedom) { 7744: $samedom = 1; 7745: } 7746: my $intdom = &Apache::lonnet::internet_dom($clientserverhomeID); 7747: my $sameinst = 0; 7748: if ($intdom ne '') { 7749: my $internet_names = &Apache::lonnet::get_internet_names($currenthostid); 7750: if (ref($internet_names) eq 'ARRAY') { 7751: if (grep(/^\Q$intdom\E$/,@{$internet_names})) { 7752: $sameinst = 1; 7753: } 7754: } 7755: } 7756: if (wantarray) { 7757: return ($samedom,$sameinst); 7758: } else { 7759: $clienthomedom = $homedom; 7760: $clientsamedom = $samedom; 7761: $clientintdom = $intdom; 7762: $clientsameinst = $sameinst; 7763: return 1; 7764: } 7765: } 7766: 7767: # 7768: # Determine if a user is an author for the indicated domain. 7769: # 7770: # Parameters: 7771: # domain - domain to check in . 7772: # user - Name of user to check. 7773: # 7774: # Return: 7775: # 1 - User is an author for domain. 7776: # 0 - User is not an author for domain. 7777: sub is_author { 7778: my ($domain, $user) = @_; 7779: 7780: &Debug("is_author: $user @ $domain"); 7781: 7782: my $hashref = &tie_user_hash($domain, $user, "roles", 7783: &GDBM_READER()); 7784: 7785: # Author role should show up as a key /domain/_au 7786: 7787: my $value; 7788: if ($hashref) { 7789: 7790: my $key = "/$domain/_au"; 7791: if (defined($hashref)) { 7792: $value = $hashref->{$key}; 7793: if(!untie_user_hash($hashref)) { 7794: return 'error: ' . ($!+0)." untie (GDBM) Failed"; 7795: } 7796: } 7797: 7798: if(defined($value)) { 7799: &Debug("$user @ $domain is an author"); 7800: } 7801: } else { 7802: return 'error: '.($!+0)." tie (GDBM) Failed"; 7803: } 7804: 7805: return defined($value); 7806: } 7807: # 7808: # Checks to see if the input roleput request was to set 7809: # an author role. If so, creates construction space 7810: # Parameters: 7811: # request - The request sent to the rolesput subchunk. 7812: # We're looking for /domain/_au 7813: # domain - The domain in which the user is having roles doctored. 7814: # user - Name of the user for which the role is being put. 7815: # authtype - The authentication type associated with the user. 7816: # 7817: sub manage_permissions { 7818: my ($request, $domain, $user, $authtype) = @_; 7819: # See if the request is of the form /$domain/_au 7820: if($request =~ /^(\/\Q$domain\E\/_au)$/) { # It's an author rolesput... 7821: my $path=$perlvar{'lonDocRoot'}."/priv/$domain"; 7822: unless (-e $path) { 7823: mkdir($path); 7824: } 7825: unless (-e $path.'/'.$user) { 7826: mkdir($path.'/'.$user); 7827: } 7828: } 7829: } 7830: 7831: 7832: # 7833: # Return the full path of a user password file, whether it exists or not. 7834: # Parameters: 7835: # domain - Domain in which the password file lives. 7836: # user - name of the user. 7837: # Returns: 7838: # Full passwd path: 7839: # 7840: sub password_path { 7841: my ($domain, $user) = @_; 7842: return &propath($domain, $user).'/passwd'; 7843: } 7844: 7845: # Password Filename 7846: # Returns the path to a passwd file given domain and user... only if 7847: # it exists. 7848: # Parameters: 7849: # domain - Domain in which to search. 7850: # user - username. 7851: # Returns: 7852: # - If the password file exists returns its path. 7853: # - If the password file does not exist, returns undefined. 7854: # 7855: sub password_filename { 7856: my ($domain, $user) = @_; 7857: 7858: Debug ("PasswordFilename called: dom = $domain user = $user"); 7859: 7860: my $path = &password_path($domain, $user); 7861: Debug("PasswordFilename got path: $path"); 7862: if(-e $path) { 7863: return $path; 7864: } else { 7865: return undef; 7866: } 7867: } 7868: 7869: # 7870: # Rewrite the contents of the user's passwd file. 7871: # Parameters: 7872: # domain - domain of the user. 7873: # name - User's name. 7874: # contents - New contents of the file. 7875: # saveold - (optional). If true save old file in a passwd.bak file. 7876: # Returns: 7877: # 0 - Failed. 7878: # 1 - Success. 7879: # 7880: sub rewrite_password_file { 7881: my ($domain, $user, $contents, $saveold) = @_; 7882: 7883: my $file = &password_filename($domain, $user); 7884: if (defined $file) { 7885: if ($saveold) { 7886: my $bakfile = $file.'.bak'; 7887: if (CopyFile($file,$bakfile)) { 7888: chmod(0400,$bakfile); 7889: &logthis("Old password saved in passwd.bak for internally authenticated user: $user:$domain"); 7890: } else { 7891: &logthis("Failed to save old password in passwd.bak for internally authenticated user: $user:$domain"); 7892: } 7893: } 7894: my $pf = IO::File->new(">$file"); 7895: if($pf) { 7896: print $pf "$contents\n"; 7897: return 1; 7898: } else { 7899: return 0; 7900: } 7901: } else { 7902: return 0; 7903: } 7904: 7905: } 7906: 7907: # 7908: # get_auth_type - Determines the authorization type of a user in a domain. 7909: 7910: # Returns the authorization type or nouser if there is no such user. 7911: # 7912: sub get_auth_type { 7913: my ($domain, $user) = @_; 7914: 7915: Debug("get_auth_type( $domain, $user ) \n"); 7916: my $proname = &propath($domain, $user); 7917: my $passwdfile = "$proname/passwd"; 7918: if( -e $passwdfile ) { 7919: my $pf = IO::File->new($passwdfile); 7920: my $realpassword = <$pf>; 7921: chomp($realpassword); 7922: Debug("Password info = $realpassword\n"); 7923: my ($authtype, $contentpwd) = split(/:/, $realpassword); 7924: Debug("Authtype = $authtype, content = $contentpwd\n"); 7925: return "$authtype:$contentpwd"; 7926: } else { 7927: Debug("Returning nouser"); 7928: return "nouser"; 7929: } 7930: } 7931: 7932: # 7933: # Validate a user given their domain, name and password. This utility 7934: # function is used by both AuthenticateHandler and ChangePasswordHandler 7935: # to validate the login credentials of a user. 7936: # Parameters: 7937: # $domain - The domain being logged into (this is required due to 7938: # the capability for multihomed systems. 7939: # $user - The name of the user being validated. 7940: # $password - The user's propoposed password. 7941: # 7942: # Returns: 7943: # 1 - The domain,user,pasword triplet corresponds to a valid 7944: # user. 7945: # 0 - The domain,user,password triplet is not a valid user. 7946: # 7947: sub validate_user { 7948: my ($domain, $user, $password, $checkdefauth) = @_; 7949: 7950: # Why negative ~pi you may well ask? Well this function is about 7951: # authentication, and therefore very important to get right. 7952: # I've initialized the flag that determines whether or not I've 7953: # validated correctly to a value it's not supposed to get. 7954: # At the end of this function. I'll ensure that it's not still that 7955: # value so we don't just wind up returning some accidental value 7956: # as a result of executing an unforseen code path that 7957: # did not set $validated. At the end of valid execution paths, 7958: # validated shoule be 1 for success or 0 for failuer. 7959: 7960: my $validated = -3.14159; 7961: 7962: # How we authenticate is determined by the type of authentication 7963: # the user has been assigned. If the authentication type is 7964: # "nouser", the user does not exist so we will return 0. 7965: 7966: my $contents = &get_auth_type($domain, $user); 7967: my ($howpwd, $contentpwd) = split(/:/, $contents); 7968: 7969: my $null = pack("C",0); # Used by kerberos auth types. 7970: 7971: if ($howpwd eq 'nouser') { 7972: if ($checkdefauth) { 7973: my %domdefaults = &Apache::lonnet::get_domain_defaults($domain); 7974: if ($domdefaults{'auth_def'} eq 'localauth') { 7975: $howpwd = $domdefaults{'auth_def'}; 7976: $contentpwd = $domdefaults{'auth_arg_def'}; 7977: } elsif ((($domdefaults{'auth_def'} eq 'krb4') || 7978: ($domdefaults{'auth_def'} eq 'krb5')) && 7979: ($domdefaults{'auth_arg_def'} ne '')) { 7980: $howpwd = $domdefaults{'auth_def'}; 7981: $contentpwd = $domdefaults{'auth_arg_def'}; 7982: } 7983: } 7984: } 7985: if ($howpwd ne 'nouser') { 7986: if($howpwd eq "internal") { # Encrypted is in local password file. 7987: if (length($contentpwd) == 13) { 7988: $validated = (crypt($password,$contentpwd) eq $contentpwd); 7989: if ($validated) { 7990: my %domdefaults = &Apache::lonnet::get_domain_defaults($domain); 7991: if ($domdefaults{'intauth_switch'}) { 7992: my $ncpass = &hash_passwd($domain,$password); 7993: my $saveold; 7994: if ($domdefaults{'intauth_switch'} == 2) { 7995: $saveold = 1; 7996: } 7997: if (&rewrite_password_file($domain,$user,"$howpwd:$ncpass",$saveold)) { 7998: &update_passwd_history($user,$domain,$howpwd,'conversion'); 7999: &logthis("Validated password hashed with bcrypt for $user:$domain"); 8000: } 8001: } 8002: } 8003: } else { 8004: $validated = &check_internal_passwd($password,$contentpwd,$domain,$user); 8005: } 8006: } 8007: elsif ($howpwd eq "unix") { # User is a normal unix user. 8008: $contentpwd = (getpwnam($user))[1]; 8009: if($contentpwd) { 8010: if($contentpwd eq 'x') { # Shadow password file... 8011: my $pwauth_path = "/usr/local/sbin/pwauth"; 8012: open PWAUTH, "|$pwauth_path" or 8013: die "Cannot invoke authentication"; 8014: print PWAUTH "$user\n$password\n"; 8015: close PWAUTH; 8016: $validated = ! $?; 8017: 8018: } else { # Passwords in /etc/passwd. 8019: $validated = (crypt($password, 8020: $contentpwd) eq $contentpwd); 8021: } 8022: } else { 8023: $validated = 0; 8024: } 8025: } elsif ($howpwd eq "krb4") { # user is in kerberos 4 auth. domain. 8026: my $checkwithkrb5 = 0; 8027: if ($dist =~/^fedora(\d+)$/) { 8028: if ($1 > 11) { 8029: $checkwithkrb5 = 1; 8030: } 8031: } elsif ($dist =~ /^suse([\d.]+)$/) { 8032: if ($1 > 11.1) { 8033: $checkwithkrb5 = 1; 8034: } 8035: } 8036: if ($checkwithkrb5) { 8037: $validated = &krb5_authen($password,$null,$user,$contentpwd); 8038: } else { 8039: $validated = &krb4_authen($password,$null,$user,$contentpwd); 8040: } 8041: } elsif ($howpwd eq "krb5") { # User is in kerberos 5 auth. domain. 8042: $validated = &krb5_authen($password,$null,$user,$contentpwd); 8043: } elsif ($howpwd eq "localauth") { 8044: # Authenticate via installation specific authentcation method: 8045: $validated = &localauth::localauth($user, 8046: $password, 8047: $contentpwd, 8048: $domain); 8049: if ($validated < 0) { 8050: &logthis("localauth for $contentpwd $user:$domain returned a $validated"); 8051: $validated = 0; 8052: } 8053: } else { # Unrecognized auth is also bad. 8054: $validated = 0; 8055: } 8056: } else { 8057: $validated = 0; 8058: } 8059: # 8060: # $validated has the correct stat of the authentication: 8061: # 8062: 8063: unless ($validated != -3.14159) { 8064: # I >really really< want to know if this happens. 8065: # since it indicates that user authentication is badly 8066: # broken in some code path. 8067: # 8068: die "ValidateUser - failed to set the value of validated $domain, $user $password"; 8069: } 8070: return $validated; 8071: } 8072: 8073: sub check_internal_passwd { 8074: my ($plainpass,$stored,$domain,$user) = @_; 8075: my (undef,$method,@rest) = split(/!/,$stored); 8076: if ($method eq 'bcrypt') { 8077: my $result = &hash_passwd($domain,$plainpass,@rest); 8078: if ($result ne $stored) { 8079: return 0; 8080: } 8081: my %domdefaults = &Apache::lonnet::get_domain_defaults($domain); 8082: if ($domdefaults{'intauth_check'}) { 8083: # Upgrade to a larger number of rounds if necessary 8084: my $defaultcost = $domdefaults{'intauth_cost'}; 8085: if (($defaultcost eq '') || ($defaultcost =~ /D/)) { 8086: $defaultcost = 10; 8087: } 8088: if (int($rest[0])<int($defaultcost)) { 8089: if ($domdefaults{'intauth_check'} == 1) { 8090: my $ncpass = &hash_passwd($domain,$plainpass); 8091: if (&rewrite_password_file($domain,$user,"internal:$ncpass")) { 8092: &update_passwd_history($user,$domain,'internal','update cost'); 8093: &logthis("Validated password hashed with bcrypt for $user:$domain"); 8094: } 8095: return 1; 8096: } elsif ($domdefaults{'intauth_check'} == 2) { 8097: return 0; 8098: } 8099: } 8100: } else { 8101: return 1; 8102: } 8103: } 8104: return 0; 8105: } 8106: 8107: sub get_last_authchg { 8108: my ($domain,$user) = @_; 8109: my $lastmod; 8110: my $logname = &propath($domain,$user).'/passwd.log'; 8111: if (-e "$logname") { 8112: $lastmod = (stat("$logname"))[9]; 8113: } 8114: return $lastmod; 8115: } 8116: 8117: sub krb4_authen { 8118: my ($password,$null,$user,$contentpwd) = @_; 8119: my $validated = 0; 8120: if (!($password =~ /$null/) ) { # Null password not allowed. 8121: eval { 8122: require Authen::Krb4; 8123: }; 8124: if (!$@) { 8125: my $k4error = &Authen::Krb4::get_pw_in_tkt($user, 8126: "", 8127: $contentpwd,, 8128: 'krbtgt', 8129: $contentpwd, 8130: 1, 8131: $password); 8132: if(!$k4error) { 8133: $validated = 1; 8134: } else { 8135: $validated = 0; 8136: &logthis('krb4: '.$user.', '.$contentpwd.', '. 8137: &Authen::Krb4::get_err_txt($Authen::Krb4::error)); 8138: } 8139: } else { 8140: $validated = krb5_authen($password,$null,$user,$contentpwd); 8141: } 8142: } 8143: return $validated; 8144: } 8145: 8146: sub krb5_authen { 8147: my ($password,$null,$user,$contentpwd) = @_; 8148: my $validated = 0; 8149: if(!($password =~ /$null/)) { # Null password not allowed. 8150: my $krbclient = &Authen::Krb5::parse_name($user.'@' 8151: .$contentpwd); 8152: my $krbservice = "krbtgt/".$contentpwd."\@".$contentpwd; 8153: my $krbserver = &Authen::Krb5::parse_name($krbservice); 8154: my $credentials= &Authen::Krb5::cc_default(); 8155: $credentials->initialize(&Authen::Krb5::parse_name($user.'@' 8156: .$contentpwd)); 8157: my $krbreturn; 8158: if (exists(&Authen::Krb5::get_init_creds_password)) { 8159: $krbreturn = 8160: &Authen::Krb5::get_init_creds_password($krbclient,$password, 8161: $krbservice); 8162: $validated = (ref($krbreturn) eq 'Authen::Krb5::Creds'); 8163: } else { 8164: $krbreturn = 8165: &Authen::Krb5::get_in_tkt_with_password($krbclient,$krbserver, 8166: $password,$credentials); 8167: $validated = ($krbreturn == 1); 8168: } 8169: if (!$validated) { 8170: &logthis('krb5: '.$user.', '.$contentpwd.', '. 8171: &Authen::Krb5::error()); 8172: } 8173: } 8174: return $validated; 8175: } 8176: 8177: sub addline { 8178: my ($fname,$hostid,$ip,$newline)=@_; 8179: my $contents; 8180: my $found=0; 8181: my $expr='^'.quotemeta($hostid).':'.quotemeta($ip).':'; 8182: my $sh; 8183: if ($sh=IO::File->new("$fname.subscription")) { 8184: while (my $subline=<$sh>) { 8185: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;} 8186: } 8187: $sh->close(); 8188: } 8189: $sh=IO::File->new(">$fname.subscription"); 8190: if ($contents) { print $sh $contents; } 8191: if ($newline) { print $sh $newline; } 8192: $sh->close(); 8193: return $found; 8194: } 8195: 8196: sub get_chat { 8197: my ($cdom,$cname,$udom,$uname,$group)=@_; 8198: 8199: my @entries=(); 8200: my $namespace = 'nohist_chatroom'; 8201: my $namespace_inroom = 'nohist_inchatroom'; 8202: if ($group ne '') { 8203: $namespace .= '_'.$group; 8204: $namespace_inroom .= '_'.$group; 8205: } 8206: my $hashref = &tie_user_hash($cdom, $cname, $namespace, 8207: &GDBM_READER()); 8208: if ($hashref) { 8209: @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref)); 8210: &untie_user_hash($hashref); 8211: } 8212: my @participants=(); 8213: my $cutoff=time-60; 8214: $hashref = &tie_user_hash($cdom, $cname, $namespace_inroom, 8215: &GDBM_WRCREAT()); 8216: if ($hashref) { 8217: $hashref->{$uname.':'.$udom}=time; 8218: foreach my $user (sort(keys(%$hashref))) { 8219: if ($hashref->{$user}>$cutoff) { 8220: push(@participants, 'active_participant:'.$user); 8221: } 8222: } 8223: &untie_user_hash($hashref); 8224: } 8225: return (@participants,@entries); 8226: } 8227: 8228: sub chat_add { 8229: my ($cdom,$cname,$newchat,$group)=@_; 8230: my @entries=(); 8231: my $time=time; 8232: my $namespace = 'nohist_chatroom'; 8233: my $logfile = 'chatroom.log'; 8234: if ($group ne '') { 8235: $namespace .= '_'.$group; 8236: $logfile = 'chatroom_'.$group.'.log'; 8237: } 8238: my $hashref = &tie_user_hash($cdom, $cname, $namespace, 8239: &GDBM_WRCREAT()); 8240: if ($hashref) { 8241: @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref)); 8242: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/); 8243: my ($thentime,$idnum)=split(/\_/,$lastid); 8244: my $newid=$time.'_000000'; 8245: if ($thentime==$time) { 8246: $idnum=~s/^0+//; 8247: $idnum++; 8248: $idnum=substr('000000'.$idnum,-6,6); 8249: $newid=$time.'_'.$idnum; 8250: } 8251: $hashref->{$newid}=$newchat; 8252: my $expired=$time-3600; 8253: foreach my $comment (keys(%$hashref)) { 8254: my ($thistime) = ($comment=~/(\d+)\_/); 8255: if ($thistime<$expired) { 8256: delete $hashref->{$comment}; 8257: } 8258: } 8259: { 8260: my $proname=&propath($cdom,$cname); 8261: if (open(CHATLOG,">>$proname/$logfile")) { 8262: print CHATLOG ("$time:".&unescape($newchat)."\n"); 8263: } 8264: close(CHATLOG); 8265: } 8266: &untie_user_hash($hashref); 8267: } 8268: } 8269: 8270: sub unsub { 8271: my ($fname,$clientip)=@_; 8272: my $result; 8273: my $unsubs = 0; # Number of successful unsubscribes: 8274: 8275: 8276: # An old way subscriptions were handled was to have a 8277: # subscription marker file: 8278: 8279: Debug("Attempting unlink of $fname.$clientname"); 8280: if (unlink("$fname.$clientname")) { 8281: $unsubs++; # Successful unsub via marker file. 8282: } 8283: 8284: # The more modern way to do it is to have a subscription list 8285: # file: 8286: 8287: if (-e "$fname.subscription") { 8288: my $found=&addline($fname,$clientname,$clientip,''); 8289: if ($found) { 8290: $unsubs++; 8291: } 8292: } 8293: 8294: # If either or both of these mechanisms succeeded in unsubscribing a 8295: # resource we can return ok: 8296: 8297: if($unsubs) { 8298: $result = "ok\n"; 8299: } else { 8300: $result = "not_subscribed\n"; 8301: } 8302: 8303: return $result; 8304: } 8305: 8306: sub currentversion { 8307: my $fname=shift; 8308: my $version=-1; 8309: my $ulsdir=''; 8310: if ($fname=~/^(.+)\/[^\/]+$/) { 8311: $ulsdir=$1; 8312: } 8313: my ($fnamere1,$fnamere2); 8314: # remove version if already specified 8315: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/; 8316: # get the bits that go before and after the version number 8317: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) { 8318: $fnamere1=$1; 8319: $fnamere2='.'.$2; 8320: } 8321: if (-e $fname) { $version=1; } 8322: if (-e $ulsdir) { 8323: if(-d $ulsdir) { 8324: if (opendir(LSDIR,$ulsdir)) { 8325: my $ulsfn; 8326: while ($ulsfn=readdir(LSDIR)) { 8327: # see if this is a regular file (ignore links produced earlier) 8328: my $thisfile=$ulsdir.'/'.$ulsfn; 8329: unless (-l $thisfile) { 8330: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) { 8331: if ($1>$version) { $version=$1; } 8332: } 8333: } 8334: } 8335: closedir(LSDIR); 8336: $version++; 8337: } 8338: } 8339: } 8340: return $version; 8341: } 8342: 8343: sub thisversion { 8344: my $fname=shift; 8345: my $version=-1; 8346: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) { 8347: $version=$1; 8348: } 8349: return $version; 8350: } 8351: 8352: sub subscribe { 8353: my ($userinput,$clientip)=@_; 8354: my $result; 8355: my ($cmd,$fname)=split(/:/,$userinput,2); 8356: my $ownership=&ishome($fname); 8357: if ($ownership eq 'owner') { 8358: # explitly asking for the current version? 8359: unless (-e $fname) { 8360: my $currentversion=&currentversion($fname); 8361: if (&thisversion($fname)==$currentversion) { 8362: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) { 8363: my $root=$1; 8364: my $extension=$2; 8365: symlink($root.'.'.$extension, 8366: $root.'.'.$currentversion.'.'.$extension); 8367: unless ($extension=~/\.meta$/) { 8368: symlink($root.'.'.$extension.'.meta', 8369: $root.'.'.$currentversion.'.'.$extension.'.meta'); 8370: } 8371: } 8372: } 8373: } 8374: if (-e $fname) { 8375: if (-d $fname) { 8376: $result="directory\n"; 8377: } else { 8378: if (-e "$fname.$clientname") {&unsub($fname,$clientip);} 8379: my $now=time; 8380: my $found=&addline($fname,$clientname,$clientip, 8381: "$clientname:$clientip:$now\n"); 8382: if ($found) { $result="$fname\n"; } 8383: # if they were subscribed to only meta data, delete that 8384: # subscription, when you subscribe to a file you also get 8385: # the metadata 8386: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); } 8387: $fname=~s/\/home\/httpd\/html\/res/raw/; 8388: my $protocol = $Apache::lonnet::protocol{$perlvar{'lonHostID'}}; 8389: $protocol = 'http' if ($protocol ne 'https'); 8390: $fname=$protocol.'://'.&Apache::lonnet::hostname($perlvar{'lonHostID'})."/".$fname; 8391: $result="$fname\n"; 8392: } 8393: } else { 8394: $result="not_found\n"; 8395: } 8396: } else { 8397: $result="rejected\n"; 8398: } 8399: return $result; 8400: } 8401: # Change the passwd of a unix user. The caller must have 8402: # first verified that the user is a loncapa user. 8403: # 8404: # Parameters: 8405: # user - Unix user name to change. 8406: # pass - New password for the user. 8407: # Returns: 8408: # ok - if success 8409: # other - Some meaningfule error message string. 8410: # NOTE: 8411: # invokes a setuid script to change the passwd. 8412: sub change_unix_password { 8413: my ($user, $pass) = @_; 8414: 8415: &Debug("change_unix_password"); 8416: my $execdir=$perlvar{'lonDaemons'}; 8417: &Debug("Opening lcpasswd pipeline"); 8418: my $pf = IO::File->new("|$execdir/lcpasswd > " 8419: ."$perlvar{'lonDaemons'}" 8420: ."/logs/lcpasswd.log"); 8421: print $pf "$user\n$pass\n$pass\n"; 8422: close $pf; 8423: my $err = $?; 8424: return ($err < @passwderrors) ? $passwderrors[$err] : 8425: "pwchange_falure - unknown error"; 8426: 8427: 8428: } 8429: 8430: 8431: sub make_passwd_file { 8432: my ($uname,$udom,$umode,$npass,$passfilename,$action)=@_; 8433: my $result="ok"; 8434: if ($umode eq 'krb4' or $umode eq 'krb5') { 8435: { 8436: my $pf = IO::File->new(">$passfilename"); 8437: if ($pf) { 8438: print $pf "$umode:$npass\n"; 8439: &update_passwd_history($uname,$udom,$umode,$action); 8440: } else { 8441: $result = "pass_file_failed_error"; 8442: } 8443: } 8444: } elsif ($umode eq 'internal') { 8445: my $ncpass = &hash_passwd($udom,$npass); 8446: { 8447: &Debug("Creating internal auth"); 8448: my $pf = IO::File->new(">$passfilename"); 8449: if($pf) { 8450: print $pf "internal:$ncpass\n"; 8451: &update_passwd_history($uname,$udom,$umode,$action); 8452: } else { 8453: $result = "pass_file_failed_error"; 8454: } 8455: } 8456: } elsif ($umode eq 'localauth') { 8457: { 8458: my $pf = IO::File->new(">$passfilename"); 8459: if($pf) { 8460: print $pf "localauth:$npass\n"; 8461: &update_passwd_history($uname,$udom,$umode,$action); 8462: } else { 8463: $result = "pass_file_failed_error"; 8464: } 8465: } 8466: } elsif ($umode eq 'unix') { 8467: &logthis(">>>Attempt to create unix account blocked -- unix auth not available for new users."); 8468: $result="no_new_unix_accounts"; 8469: } elsif ($umode eq 'none') { 8470: { 8471: my $pf = IO::File->new("> $passfilename"); 8472: if($pf) { 8473: print $pf "none:\n"; 8474: } else { 8475: $result = "pass_file_failed_error"; 8476: } 8477: } 8478: } elsif ($umode eq 'lti') { 8479: my $pf = IO::File->new(">$passfilename"); 8480: if($pf) { 8481: print $pf "lti:\n"; 8482: &update_passwd_history($uname,$udom,$umode,$action); 8483: } else { 8484: $result = "pass_file_failed_error"; 8485: } 8486: } else { 8487: $result="auth_mode_error"; 8488: } 8489: return $result; 8490: } 8491: 8492: sub convert_photo { 8493: my ($start,$dest)=@_; 8494: system("convert $start $dest"); 8495: } 8496: 8497: sub sethost { 8498: my ($remotereq) = @_; 8499: my (undef,$hostid)=split(/:/,$remotereq); 8500: # ignore sethost if we are already correct 8501: if ($hostid eq $currenthostid) { 8502: return 'ok'; 8503: } 8504: 8505: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; } 8506: if (&Apache::lonnet::get_host_ip($perlvar{'lonHostID'}) 8507: eq &Apache::lonnet::get_host_ip($hostid)) { 8508: $currenthostid =$hostid; 8509: $currentdomainid=&Apache::lonnet::host_domain($hostid); 8510: # &logthis("Setting hostid to $hostid, and domain to $currentdomainid"); 8511: } else { 8512: &logthis("Requested host id $hostid not an alias of ". 8513: $perlvar{'lonHostID'}." refusing connection"); 8514: return 'unable_to_set'; 8515: } 8516: return 'ok'; 8517: } 8518: 8519: sub version { 8520: my ($userinput)=@_; 8521: $remoteVERSION=(split(/:/,$userinput))[1]; 8522: return "version:$VERSION"; 8523: } 8524: 8525: sub get_usersession_config { 8526: my ($dom,$name) = @_; 8527: my ($usersessionconf,$cached)=&Apache::lonnet::is_cached_new($name,$dom); 8528: if (defined($cached)) { 8529: return $usersessionconf; 8530: } else { 8531: my %domconfig = &Apache::lonnet::get_dom('configuration',['usersessions'],$dom); 8532: &Apache::lonnet::do_cache_new($name,$dom,$domconfig{'usersessions'},3600); 8533: return $domconfig{'usersessions'}; 8534: } 8535: return; 8536: } 8537: 8538: sub get_usersearch_config { 8539: my ($dom,$name) = @_; 8540: my ($usersearchconf,$cached)=&Apache::lonnet::is_cached_new($name,$dom); 8541: if (defined($cached)) { 8542: return $usersearchconf; 8543: } else { 8544: my %domconfig = &Apache::lonnet::get_dom('configuration',['directorysrch'],$dom); 8545: &Apache::lonnet::do_cache_new($name,$dom,$domconfig{'directorysrch'},600); 8546: return $domconfig{'directorysrch'}; 8547: } 8548: return; 8549: } 8550: 8551: sub get_prohibited { 8552: my ($dom) = @_; 8553: my $name = 'trust'; 8554: my ($trustconfig,$cached)=&Apache::lonnet::is_cached_new($name,$dom); 8555: unless (defined($cached)) { 8556: my %domconfig = &Apache::lonnet::get_dom('configuration',['trust'],$dom); 8557: &Apache::lonnet::do_cache_new($name,$dom,$domconfig{'trust'},3600); 8558: $trustconfig = $domconfig{'trust'}; 8559: } 8560: my %prohibited; 8561: if (ref($trustconfig)) { 8562: foreach my $prefix (keys(%{$trustconfig})) { 8563: if (ref($trustconfig->{$prefix}) eq 'HASH') { 8564: my $reject; 8565: if (ref($trustconfig->{$prefix}->{'exc'}) eq 'ARRAY') { 8566: if (grep(/^\Q$clientintdom\E$/,@{$trustconfig->{$prefix}->{'exc'}})) { 8567: $reject = 1; 8568: } 8569: } 8570: if (ref($trustconfig->{$prefix}->{'inc'}) eq 'ARRAY') { 8571: if (grep(/^\Q$clientintdom\E$/,@{$trustconfig->{$prefix}->{'inc'}})) { 8572: $reject = 0; 8573: } else { 8574: $reject = 1; 8575: } 8576: } 8577: if ($reject) { 8578: $prohibited{$prefix} = 1; 8579: } 8580: } 8581: } 8582: } 8583: return %prohibited; 8584: } 8585: 8586: sub distro_and_arch { 8587: return $dist.':'.$arch; 8588: } 8589: 8590: # ----------------------------------- POD (plain old documentation, CPAN style) 8591: 8592: =head1 NAME 8593: 8594: lond - "LON Daemon" Server (port "LOND" 5663) 8595: 8596: =head1 SYNOPSIS 8597: 8598: Usage: B<lond> 8599: 8600: Should only be run as user=www. This is a command-line script which 8601: is invoked by B<loncron>. There is no expectation that a typical user 8602: will manually start B<lond> from the command-line. (In other words, 8603: DO NOT START B<lond> YOURSELF.) 8604: 8605: =head1 DESCRIPTION 8606: 8607: There are two characteristics associated with the running of B<lond>, 8608: PROCESS MANAGEMENT (starting, stopping, handling child processes) 8609: and SERVER-SIDE ACTIVITIES (password authentication, user creation, 8610: subscriptions, etc). These are described in two large 8611: sections below. 8612: 8613: B<PROCESS MANAGEMENT> 8614: 8615: Preforker - server who forks first. Runs as a daemon. HUPs. 8616: Uses IDEA encryption 8617: 8618: B<lond> forks off children processes that correspond to the other servers 8619: in the network. Management of these processes can be done at the 8620: parent process level or the child process level. 8621: 8622: B<logs/lond.log> is the location of log messages. 8623: 8624: The process management is now explained in terms of linux shell commands, 8625: subroutines internal to this code, and signal assignments: 8626: 8627: =over 4 8628: 8629: =item * 8630: 8631: PID is stored in B<logs/lond.pid> 8632: 8633: This is the process id number of the parent B<lond> process. 8634: 8635: =item * 8636: 8637: SIGTERM and SIGINT 8638: 8639: Parent signal assignment: 8640: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN; 8641: 8642: Child signal assignment: 8643: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also) 8644: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber 8645: to restart a new child.) 8646: 8647: Command-line invocations: 8648: B<kill> B<-s> SIGTERM I<PID> 8649: B<kill> B<-s> SIGINT I<PID> 8650: 8651: Subroutine B<HUNTSMAN>: 8652: This is only invoked for the B<lond> parent I<PID>. 8653: This kills all the children, and then the parent. 8654: The B<lonc.pid> file is cleared. 8655: 8656: =item * 8657: 8658: SIGHUP 8659: 8660: Current bug: 8661: This signal can only be processed the first time 8662: on the parent process. Subsequent SIGHUP signals 8663: have no effect. 8664: 8665: Parent signal assignment: 8666: $SIG{HUP} = \&HUPSMAN; 8667: 8668: Child signal assignment: 8669: none (nothing happens) 8670: 8671: Command-line invocations: 8672: B<kill> B<-s> SIGHUP I<PID> 8673: 8674: Subroutine B<HUPSMAN>: 8675: This is only invoked for the B<lond> parent I<PID>, 8676: This kills all the children, and then the parent. 8677: The B<lond.pid> file is cleared. 8678: 8679: =item * 8680: 8681: SIGUSR1 8682: 8683: Parent signal assignment: 8684: $SIG{USR1} = \&USRMAN; 8685: 8686: Child signal assignment: 8687: $SIG{USR1}= \&logstatus; 8688: 8689: Command-line invocations: 8690: B<kill> B<-s> SIGUSR1 I<PID> 8691: 8692: Subroutine B<USRMAN>: 8693: When invoked for the B<lond> parent I<PID>, 8694: SIGUSR1 is sent to all the children, and the status of 8695: each connection is logged. 8696: 8697: =item * 8698: 8699: SIGUSR2 8700: 8701: Parent Signal assignment: 8702: $SIG{USR2} = \&UpdateHosts 8703: 8704: Child signal assignment: 8705: NONE 8706: 8707: 8708: =item * 8709: 8710: SIGCHLD 8711: 8712: Parent signal assignment: 8713: $SIG{CHLD} = \&REAPER; 8714: 8715: Child signal assignment: 8716: none 8717: 8718: Command-line invocations: 8719: B<kill> B<-s> SIGCHLD I<PID> 8720: 8721: Subroutine B<REAPER>: 8722: This is only invoked for the B<lond> parent I<PID>. 8723: Information pertaining to the child is removed. 8724: The socket port is cleaned up. 8725: 8726: =back 8727: 8728: B<SERVER-SIDE ACTIVITIES> 8729: 8730: Server-side information can be accepted in an encrypted or non-encrypted 8731: method. 8732: 8733: =over 4 8734: 8735: =item ping 8736: 8737: Query a client in the hosts.tab table; "Are you there?" 8738: 8739: =item pong 8740: 8741: Respond to a ping query. 8742: 8743: =item ekey 8744: 8745: Read in encrypted key, make cipher. Respond with a buildkey. 8746: 8747: =item load 8748: 8749: Respond with CPU load based on a computation upon /proc/loadavg. 8750: 8751: =item currentauth 8752: 8753: Reply with current authentication information (only over an 8754: encrypted channel). 8755: 8756: =item auth 8757: 8758: Only over an encrypted channel, reply as to whether a user's 8759: authentication information can be validated. 8760: 8761: =item passwd 8762: 8763: Allow for a password to be set. 8764: 8765: =item makeuser 8766: 8767: Make a user. 8768: 8769: =item changeuserauth 8770: 8771: Allow for authentication mechanism and password to be changed. 8772: 8773: =item home 8774: 8775: Respond to a question "are you the home for a given user?" 8776: 8777: =item update 8778: 8779: Update contents of a subscribed resource. 8780: 8781: =item unsubscribe 8782: 8783: The server is unsubscribing from a resource. 8784: 8785: =item subscribe 8786: 8787: The server is subscribing to a resource. 8788: 8789: =item log 8790: 8791: Place in B<logs/lond.log> 8792: 8793: =item put 8794: 8795: stores hash in namespace 8796: 8797: =item rolesput 8798: 8799: put a role into a user's environment 8800: 8801: =item get 8802: 8803: returns hash with keys from array 8804: reference filled in from namespace 8805: 8806: =item eget 8807: 8808: returns hash with keys from array 8809: reference filled in from namesp (encrypts the return communication) 8810: 8811: =item rolesget 8812: 8813: get a role from a user's environment 8814: 8815: =item del 8816: 8817: deletes keys out of array from namespace 8818: 8819: =item keys 8820: 8821: returns namespace keys 8822: 8823: =item dump 8824: 8825: dumps the complete (or key matching regexp) namespace into a hash 8826: 8827: =item store 8828: 8829: stores hash permanently 8830: for this url; hashref needs to be given and should be a \%hashname; the 8831: remaining args aren't required and if they aren't passed or are '' they will 8832: be derived from the ENV 8833: 8834: =item restore 8835: 8836: returns a hash for a given url 8837: 8838: =item querysend 8839: 8840: Tells client about the lonsql process that has been launched in response 8841: to a sent query. 8842: 8843: =item queryreply 8844: 8845: Accept information from lonsql and make appropriate storage in temporary 8846: file space. 8847: 8848: =item idput 8849: 8850: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers 8851: for each student, defined perhaps by the institutional Registrar.) 8852: 8853: =item idget 8854: 8855: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers 8856: for each student, defined perhaps by the institutional Registrar.) 8857: 8858: =item iddel 8859: 8860: Deletes one or more ids in a domain's id database. 8861: 8862: =item tmpput 8863: 8864: Accept and store information in temporary space. 8865: 8866: =item tmpget 8867: 8868: Send along temporarily stored information. 8869: 8870: =item ls 8871: 8872: List part of a user's directory. 8873: 8874: =item pushtable 8875: 8876: Pushes a file in /home/httpd/lonTab directory. Currently limited to: 8877: hosts.tab and domain.tab. The old file is copied to *.tab.backup but 8878: must be restored manually in case of a problem with the new table file. 8879: pushtable requires that the request be encrypted and validated via 8880: ValidateManager. The form of the command is: 8881: enc:pushtable tablename <tablecontents> \n 8882: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a 8883: cleartext newline. 8884: 8885: =item Hanging up (exit or init) 8886: 8887: What to do when a client tells the server that they (the client) 8888: are leaving the network. 8889: 8890: =item unknown command 8891: 8892: If B<lond> is sent an unknown command (not in the list above), 8893: it replys to the client "unknown_cmd". 8894: 8895: 8896: =item UNKNOWN CLIENT 8897: 8898: If the anti-spoofing algorithm cannot verify the client, 8899: the client is rejected (with a "refused" message sent 8900: to the client, and the connection is closed. 8901: 8902: =back 8903: 8904: =head1 PREREQUISITES 8905: 8906: IO::Socket 8907: IO::File 8908: Apache::File 8909: POSIX 8910: Crypt::IDEA 8911: GDBM_File 8912: Authen::Krb4 8913: Authen::Krb5 8914: 8915: =head1 COREQUISITES 8916: 8917: none 8918: 8919: =head1 OSNAMES 8920: 8921: linux 8922: 8923: =head1 SCRIPT CATEGORIES 8924: 8925: Server/Process 8926: 8927: =cut 8928: 8929: 8930: =pod 8931: 8932: =head1 LOG MESSAGES 8933: 8934: The messages below can be emitted in the lond log. This log is located 8935: in ~httpd/perl/logs/lond.log Many log messages have HTML encapsulation 8936: to provide coloring if examined from inside a web page. Some do not. 8937: Where color is used, the colors are; Red for sometihhng to get excited 8938: about and to follow up on. Yellow for something to keep an eye on to 8939: be sure it does not get worse, Green,and Blue for informational items. 8940: 8941: In the discussions below, sometimes reference is made to ~httpd 8942: when describing file locations. There isn't really an httpd 8943: user, however there is an httpd directory that gets installed in the 8944: place that user home directories go. On linux, this is usually 8945: (always?) /home/httpd. 8946: 8947: 8948: Some messages are colorless. These are usually (not always) 8949: Green/Blue color level messages. 8950: 8951: =over 2 8952: 8953: =item (Red) LocalConnection rejecting non local: <ip> ne 127.0.0.1 8954: 8955: A local connection negotiation was attempted by 8956: a host whose IP address was not 127.0.0.1. 8957: The socket is closed and the child will exit. 8958: lond has three ways to establish an encyrption 8959: key with a client: 8960: 8961: =over 2 8962: 8963: =item local 8964: 8965: The key is written and read from a file. 8966: This is only valid for connections from localhost. 8967: 8968: =item insecure 8969: 8970: The key is generated by the server and 8971: transmitted to the client. 8972: 8973: =item ssl (secure) 8974: 8975: An ssl connection is negotiated with the client, 8976: the key is generated by the server and sent to the 8977: client across this ssl connection before the 8978: ssl connectionis terminated and clear text 8979: transmission resumes. 8980: 8981: =back 8982: 8983: =item (Red) LocalConnection: caller is insane! init = <init> and type = <type> 8984: 8985: The client is local but has not sent an initialization 8986: string that is the literal "init:local" The connection 8987: is closed and the child exits. 8988: 8989: =item Red CRITICAL Can't get key file <error> 8990: 8991: SSL key negotiation is being attempted but the call to 8992: lonssl::KeyFile failed. This usually means that the 8993: configuration file is not correctly defining or protecting 8994: the directories/files lonCertificateDirectory or 8995: lonnetPrivateKey 8996: <error> is a string that describes the reason that 8997: the key file could not be located. 8998: 8999: =item (Red) CRITICAL Can't get certificates <error> 9000: 9001: SSL key negotiation failed because we were not able to retrives our certificate 9002: or the CA's certificate in the call to lonssl::CertificateFile 9003: <error> is the textual reason this failed. Usual reasons: 9004: 9005: =over 2 9006: 9007: =item Apache config file for loncapa incorrect: 9008: 9009: one of the variables 9010: lonCertificateDirectory, lonnetCertificateAuthority, or lonnetCertificate 9011: undefined or incorrect 9012: 9013: =item Permission error: 9014: 9015: The directory pointed to by lonCertificateDirectory is not readable by lond 9016: 9017: =item Permission error: 9018: 9019: Files in the directory pointed to by lonCertificateDirectory are not readable by lond. 9020: 9021: =item Installation error: 9022: 9023: Either the certificate authority file or the certificate have not 9024: been installed in lonCertificateDirectory. 9025: 9026: =item (Red) CRITICAL SSL Socket promotion failed: <err> 9027: 9028: The promotion of the connection from plaintext to SSL failed 9029: <err> is the reason for the failure. There are two 9030: system calls involved in the promotion (one of which failed), 9031: a dup to produce 9032: a second fd on the raw socket over which the encrypted data 9033: will flow and IO::SOcket::SSL->new_from_fd which creates 9034: the SSL connection on the duped fd. 9035: 9036: =item (Blue) WARNING client did not respond to challenge 9037: 9038: This occurs on an insecure (non SSL) connection negotiation request. 9039: lond generates some number from the time, the PID and sends it to 9040: the client. The client must respond by echoing this information back. 9041: If the client does not do so, that's a violation of the challenge 9042: protocols and the connection will be failed. 9043: 9044: =item (Red) No manager table. Nobody can manage!! 9045: 9046: lond has the concept of privileged hosts that 9047: can perform remote management function such 9048: as update the hosts.tab. The manager hosts 9049: are described in the 9050: ~httpd/lonTabs/managers.tab file. 9051: this message is logged if this file is missing. 9052: 9053: 9054: =item (Green) Registering manager <dnsname> as <cluster_name> with <ipaddress> 9055: 9056: Reports the successful parse and registration 9057: of a specific manager. 9058: 9059: =item Green existing host <clustername:dnsname> 9060: 9061: The manager host is already defined in the hosts.tab 9062: the information in that table, rather than the info in the 9063: manager table will be used to determine the manager's ip. 9064: 9065: =item (Red) Unable to craete <filename> 9066: 9067: lond has been asked to create new versions of an administrative 9068: file (by a manager). When this is done, the new file is created 9069: in a temp file and then renamed into place so that there are always 9070: usable administrative files, even if the update fails. This failure 9071: message means that the temp file could not be created. 9072: The update is abandoned, and the old file is available for use. 9073: 9074: =item (Green) CopyFile from <oldname> to <newname> failed 9075: 9076: In an update of administrative files, the copy of the existing file to a 9077: backup file failed. The installation of the new file may still succeed, 9078: but there will not be a back up file to rever to (this should probably 9079: be yellow). 9080: 9081: =item (Green) Pushfile: backed up <oldname> to <newname> 9082: 9083: See above, the backup of the old administrative file succeeded. 9084: 9085: =item (Red) Pushfile: Unable to install <filename> <reason> 9086: 9087: The new administrative file could not be installed. In this case, 9088: the old administrative file is still in use. 9089: 9090: =item (Green) Installed new < filename>. 9091: 9092: The new administrative file was successfullly installed. 9093: 9094: =item (Red) Reinitializing lond pid=<pid> 9095: 9096: The lonc child process <pid> will be sent a USR2 9097: signal. 9098: 9099: =item (Red) Reinitializing self 9100: 9101: We've been asked to re-read our administrative files,and 9102: are doing so. 9103: 9104: =item (Yellow) error:Invalid process identifier <ident> 9105: 9106: A reinit command was received, but the target part of the 9107: command was not valid. It must be either 9108: 'lond' or 'lonc' but was <ident> 9109: 9110: =item (Green) isValideditCommand checking: Command = <command> Key = <key> newline = <newline> 9111: 9112: Checking to see if lond has been handed a valid edit 9113: command. It is possible the edit command is not valid 9114: in that case there are no log messages to indicate that. 9115: 9116: =item Result of password change for <username> pwchange_success 9117: 9118: The password for <username> was 9119: successfully changed. 9120: 9121: =item Unable to open <user> passwd to change password 9122: 9123: Could not rewrite the 9124: internal password file for a user 9125: 9126: =item Result of password change for <user> : <result> 9127: 9128: A unix password change for <user> was attempted 9129: and the pipe returned <result> 9130: 9131: =item LWP GET: <message> for <fname> (<remoteurl>) 9132: 9133: The lightweight process fetch for a resource failed 9134: with <message> the local filename that should 9135: have existed/been created was <fname> the 9136: corresponding URI: <remoteurl> This is emitted in several 9137: places. 9138: 9139: =item Unable to move <transname> to <destname> 9140: 9141: From fetch_user_file_handler - the user file was replicated but could not 9142: be mv'd to its final location. 9143: 9144: =item Looking for <domain> <username> 9145: 9146: From user_has_session_handler - This should be a Debug call instead 9147: it indicates lond is about to check whether the specified user has a 9148: session active on the specified domain on the local host. 9149: 9150: =item Client <ip> (<name>) hanging up: <input> 9151: 9152: lond has been asked to exit by its client. The <ip> and <name> identify the 9153: client systemand <input> is the full exit command sent to the server. 9154: 9155: =item Red CRITICAL: ABNORMAL EXIT. child <pid> for server <hostname> died through a crass with this error->[<message>]. 9156: 9157: A lond child terminated. NOte that this termination can also occur when the 9158: child receives the QUIT or DIE signals. <pid> is the process id of the child, 9159: <hostname> the host lond is working for, and <message> the reason the child died 9160: to the best of our ability to get it (I would guess that any numeric value 9161: represents and errno value). This is immediately followed by 9162: 9163: =item Famous last words: Catching exception - <log> 9164: 9165: Where log is some recent information about the state of the child. 9166: 9167: =item Red CRITICAL: TIME OUT <pid> 9168: 9169: Some timeout occured for server <pid>. THis is normally a timeout on an LWP 9170: doing an HTTP::GET. 9171: 9172: =item child <pid> died 9173: 9174: The reaper caught a SIGCHILD for the lond child process <pid> 9175: This should be modified to also display the IP of the dying child 9176: $children{$pid} 9177: 9178: =item Unknown child 0 died 9179: A child died but the wait for it returned a pid of zero which really should not 9180: ever happen. 9181: 9182: =item Child <which> - <pid> looks like we missed it's death 9183: 9184: When a sigchild is received, the reaper process checks all children to see if they are 9185: alive. If children are dying quite quickly, the lack of signal queuing can mean 9186: that a signal hearalds the death of more than one child. If so this message indicates 9187: which other one died. <which> is the ip of a dead child 9188: 9189: =item Free socket: <shutdownretval> 9190: 9191: The HUNTSMAN sub was called due to a SIGINT in a child process. The socket is being shutdown. 9192: for whatever reason, <shutdownretval> is printed but in fact shutdown() is not documented 9193: to return anything. This is followed by: 9194: 9195: =item Red CRITICAL: Shutting down 9196: 9197: Just prior to exit. 9198: 9199: =item Free socket: <shutdownretval> 9200: 9201: The HUPSMAN sub was called due to a SIGHUP. all children get killsed, and lond execs itself. 9202: This is followed by: 9203: 9204: =item (Red) CRITICAL: Restarting 9205: 9206: lond is about to exec itself to restart. 9207: 9208: =item (Blue) Updating connections 9209: 9210: (In response to a USR2). All the children (except the one for localhost) 9211: are about to be killed, the hosts tab reread, and Apache reloaded via apachereload. 9212: 9213: =item (Blue) UpdateHosts killing child <pid> for ip <ip> 9214: 9215: Due to USR2 as above. 9216: 9217: =item (Green) keeping child for ip <ip> (pid = <pid>) 9218: 9219: In response to USR2 as above, the child indicated is not being restarted because 9220: it's assumed that we'll always need a child for the localhost. 9221: 9222: 9223: =item Going to check on the children 9224: 9225: Parent is about to check on the health of the child processes. 9226: Note that this is in response to a USR1 sent to the parent lond. 9227: there may be one or more of the next two messages: 9228: 9229: =item <pid> is dead 9230: 9231: A child that we have in our child hash as alive has evidently died. 9232: 9233: =item Child <pid> did not respond 9234: 9235: In the health check the child <pid> did not update/produce a pid_.txt 9236: file when sent it's USR1 signal. That process is killed with a 9 signal, as it's 9237: assumed to be hung in some un-fixable way. 9238: 9239: =item Finished checking children 9240: 9241: Master processs's USR1 processing is cojmplete. 9242: 9243: =item (Red) CRITICAL: ------- Starting ------ 9244: 9245: (There are more '-'s on either side). Lond has forked itself off to 9246: form a new session and is about to start actual initialization. 9247: 9248: =item (Green) Attempting to start child (<client>) 9249: 9250: Started a new child process for <client>. Client is IO::Socket object 9251: connected to the child. This was as a result of a TCP/IP connection from a client. 9252: 9253: =item Unable to determine who caller was, getpeername returned nothing 9254: 9255: In child process initialization. either getpeername returned undef or 9256: a zero sized object was returned. Processing continues, but in my opinion, 9257: this should be cause for the child to exit. 9258: 9259: =item Unable to determine clientip 9260: 9261: In child process initialization. The peer address from getpeername was not defined. 9262: The client address is stored as "Unavailable" and processing continues. 9263: 9264: =item (Yellow) INFO: Connection <ip> <name> connection type = <type> 9265: 9266: In child initialization. A good connectionw as received from <ip>. 9267: 9268: =over 2 9269: 9270: =item <name> 9271: 9272: is the name of the client from hosts.tab. 9273: 9274: =item <type> 9275: 9276: Is the connection type which is either 9277: 9278: =over 2 9279: 9280: =item manager 9281: 9282: The connection is from a manager node, not in hosts.tab 9283: 9284: =item client 9285: 9286: the connection is from a non-manager in the hosts.tab 9287: 9288: =item both 9289: 9290: The connection is from a manager in the hosts.tab. 9291: 9292: =back 9293: 9294: =back 9295: 9296: =item (Blue) Certificates not installed -- trying insecure auth 9297: 9298: One of the certificate file, key file or 9299: certificate authority file could not be found for a client attempting 9300: SSL connection intiation. COnnection will be attemptied in in-secure mode. 9301: (this would be a system with an up to date lond that has not gotten a 9302: certificate from us). 9303: 9304: =item (Green) Successful local authentication 9305: 9306: A local connection successfully negotiated the encryption key. 9307: In this case the IDEA key is in a file (that is hopefully well protected). 9308: 9309: =item (Green) Successful ssl authentication with <client> 9310: 9311: The client (<client> is the peer's name in hosts.tab), has successfully 9312: negotiated an SSL connection with this child process. 9313: 9314: =item (Green) Successful insecure authentication with <client> 9315: 9316: 9317: The client has successfully negotiated an insecure connection withthe child process. 9318: 9319: =item (Yellow) Attempted insecure connection disallowed 9320: 9321: The client attempted and failed to successfully negotiate a successful insecure 9322: connection. This can happen either because the variable londAllowInsecure is false 9323: or undefined, or becuse the child did not successfully echo back the challenge 9324: string. 9325: 9326: 9327: =back 9328: 9329: =back 9330: 9331: 9332: =cut