loncom/lond - view

File: [LON-CAPA] / loncom / lond
Revision 1.558: download - view: text, annotated - select for diffs
Fri Apr 26 20:22:10 2019 UTC (5 years, 1 month ago) by raeburn
Branches: MAIN
CVS tags: HEAD

- Domain Configuration for Passwords for internally authenticated users.
  - Rules for LON-CAPA passwords can include: number of user's previous
    passwords to save (with reuser by that user disallowed).

1: #!/usr/bin/perl 2: # The LearningOnline Network 3: # lond "LON Daemon" Server (port "LOND" 5663) 4: # 5: # $Id: lond,v 1.558 2019/04/26 20:22:10 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: 1.558 $'; #' 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; # Current domain permits hosting on client 84: # (not set if host and client share "internet domain"). 85: # Values are 0 or 1; 1 if allowed. 86: my %clientprohibited; # Commands from client prohibited for domain's 87: # users. 88: 89: my $server; 90: 91: my $keymode; 92: 93: my $cipher; # Cipher key negotiated with client 94: my $tmpsnum = 0; # Id of tmpputs. 95: 96: # 97: # Connection type is: 98: # client - All client actions are allowed 99: # manager - only management functions allowed. 100: # both - Both management and client actions are allowed 101: # 102: 103: my $ConnectionType; 104: 105: my %managers; # Ip -> manager names 106: 107: my %perlvar; # Will have the apache conf defined perl vars. 108: 109: my %secureconf; # Will have requirements for security 110: # of lond connections 111: 112: my %crlchecked; # Will contain clients for which the client's SSL 113: # has been checked against the cluster's Certificate 114: # Revocation List. 115: 116: my $dist; 117: 118: # 119: # The hash below is used for command dispatching, and is therefore keyed on the request keyword. 120: # Each element of the hash contains a reference to an array that contains: 121: # A reference to a sub that executes the request corresponding to the keyword. 122: # A flag that is true if the request must be encoded to be acceptable. 123: # A mask with bits as follows: 124: # CLIENT_OK - Set when the function is allowed by ordinary clients 125: # MANAGER_OK - Set when the function is allowed to manager clients. 126: # 127: my $CLIENT_OK = 1; 128: my $MANAGER_OK = 2; 129: my %Dispatcher; 130: 131: 132: # 133: # The array below are password error strings." 134: # 135: my $lastpwderror = 13; # Largest error number from lcpasswd. 136: my @passwderrors = ("ok", 137: "pwchange_failure - lcpasswd must be run as user 'www'", 138: "pwchange_failure - lcpasswd got incorrect number of arguments", 139: "pwchange_failure - lcpasswd did not get the right nubmer of input text lines", 140: "pwchange_failure - lcpasswd too many simultaneous pwd changes in progress", 141: "pwchange_failure - lcpasswd User does not exist.", 142: "pwchange_failure - lcpasswd Incorrect current passwd", 143: "pwchange_failure - lcpasswd Unable to su to root.", 144: "pwchange_failure - lcpasswd Cannot set new passwd.", 145: "pwchange_failure - lcpasswd Username has invalid characters", 146: "pwchange_failure - lcpasswd Invalid characters in password", 147: "pwchange_failure - lcpasswd User already exists", 148: "pwchange_failure - lcpasswd Something went wrong with user addition.", 149: "pwchange_failure - lcpasswd Password mismatch", 150: "pwchange_failure - lcpasswd Error filename is invalid"); 151: 152: 153: # This array are the errors from lcinstallfile: 154: 155: my @installerrors = ("ok", 156: "Initial user id of client not that of www", 157: "Usage error, not enough command line arguments", 158: "Source filename does not exist", 159: "Destination filename does not exist", 160: "Some file operation failed", 161: "Invalid table filename." 162: ); 163: 164: # 165: # The %trust hash classifies commands according to type of trust 166: # required for execution of the command. 167: # 168: # When clients from a different institution request execution of a 169: # particular command, the trust settings for that institution set 170: # for this domain (or default domain for a multi-domain server) will 171: # be checked to see if running the command is allowed. 172: # 173: # Trust types which depend on the "Trust" domain configuration 174: # for the machine's default domain are: 175: # 176: # content ("Access to this domain's content by others") 177: # shared ("Access to other domain's content by this domain") 178: # enroll ("Enrollment in this domain's courses by others") 179: # coaurem ("Co-author roles for this domain's users elsewhere") 180: # othcoau ("Co-author roles in this domain for others") 181: # domroles ("Domain roles in this domain assignable to others") 182: # catalog ("Course Catalog for this domain displayed elsewhere") 183: # reqcrs ("Requests for creation of courses in this domain by others") 184: # msg ("Users in other domains can send messages to this domain") 185: # 186: # Trust type which depends on the User Session Hosting (remote) 187: # domain configuration for machine's default domain is: "remote". 188: # 189: # Trust types which depend on contents of manager.tab in 190: # /home/httpd/lonTabs is: "manageronly". 191: # 192: # Trust type which requires client to share the same LON-CAPA 193: # "internet domain" (i.e., same institution as this server) is: 194: # "institutiononly". 195: # 196: 197: my %trust = ( 198: auth => {remote => 1}, 199: autocreatepassword => {remote => 1}, 200: autocrsreqchecks => {remote => 1, reqcrs => 1}, 201: autocrsrequpdate => {remote => 1}, 202: autocrsreqvalidation => {remote => 1}, 203: autogetsections => {remote => 1}, 204: autoinstcodedefaults => {remote => 1, catalog => 1}, 205: autoinstcodeformat => {remote => 1, catalog => 1}, 206: autonewcourse => {remote => 1, reqcrs => 1}, 207: autophotocheck => {remote => 1, enroll => 1}, 208: autophotochoice => {remote => 1}, 209: autophotopermission => {remote => 1, enroll => 1}, 210: autopossibleinstcodes => {remote => 1, reqcrs => 1}, 211: autoretrieve => {remote => 1, enroll => 1, catalog => 1}, 212: autorun => {remote => 1, enroll => 1, reqcrs => 1}, 213: autovalidateclass_sec => {catalog => 1}, 214: autovalidatecourse => {remote => 1, enroll => 1}, 215: autovalidateinstcode => {domroles => 1, remote => 1, enroll => 1}, 216: changeuserauth => {remote => 1, domroles => 1}, 217: chatretr => {remote => 1, enroll => 1}, 218: chatsend => {remote => 1, enroll => 1}, 219: courseiddump => {remote => 1, domroles => 1, enroll => 1}, 220: courseidput => {remote => 1, domroles => 1, enroll => 1}, 221: courseidputhash => {remote => 1, domroles => 1, enroll => 1}, 222: courselastaccess => {remote => 1, domroles => 1, enroll => 1}, 223: currentauth => {remote => 1, domroles => 1, enroll => 1}, 224: currentdump => {remote => 1, enroll => 1}, 225: currentversion => {remote=> 1, content => 1}, 226: dcmaildump => {remote => 1, domroles => 1}, 227: dcmailput => {remote => 1, domroles => 1}, 228: del => {remote => 1, domroles => 1, enroll => 1, content => 1}, 229: delbalcookie => {institutiononly => 1}, 230: deldom => {remote => 1, domroles => 1}, # not currently used 231: devalidatecache => {institutiononly => 1}, 232: domroleput => {remote => 1, enroll => 1}, 233: domrolesdump => {remote => 1, catalog => 1}, 234: du => {remote => 1, enroll => 1}, 235: du2 => {remote => 1, enroll => 1}, 236: dump => {remote => 1, enroll => 1, domroles => 1}, 237: edit => {institutiononly => 1}, #not used currently 238: eget => {remote => 1, domroles => 1, enroll => 1}, #not used currently 239: egetdom => {remote => 1, domroles => 1, enroll => 1, }, 240: ekey => {anywhere => 1}, 241: exit => {anywhere => 1}, 242: fetchuserfile => {remote => 1, enroll => 1}, 243: get => {remote => 1, domroles => 1, enroll => 1}, 244: getdom => {anywhere => 1}, 245: home => {anywhere => 1}, 246: iddel => {remote => 1, enroll => 1}, 247: idget => {remote => 1, enroll => 1}, 248: idput => {remote => 1, domroles => 1, enroll => 1}, 249: inc => {remote => 1, enroll => 1}, 250: init => {anywhere => 1}, 251: inst_usertypes => {remote => 1, domroles => 1, enroll => 1}, 252: instemailrules => {remote => 1, domroles => 1}, 253: instidrulecheck => {remote => 1, domroles => 1,}, 254: instidrules => {remote => 1, domroles => 1,}, 255: instrulecheck => {remote => 1, enroll => 1, reqcrs => 1, domroles => 1}, 256: instselfcreatecheck => {institutiononly => 1}, 257: instuserrules => {remote => 1, enroll => 1, reqcrs => 1, domroles => 1}, 258: keys => {remote => 1,}, 259: load => {anywhere => 1}, 260: log => {anywhere => 1}, 261: ls => {remote => 1, enroll => 1, content => 1,}, 262: ls2 => {remote => 1, enroll => 1, content => 1,}, 263: ls3 => {remote => 1, enroll => 1, content => 1,}, 264: makeuser => {remote => 1, enroll => 1, domroles => 1,}, 265: mkdiruserfile => {remote => 1, enroll => 1,}, 266: newput => {remote => 1, enroll => 1, reqcrs => 1, domroles => 1,}, 267: passwd => {remote => 1}, 268: ping => {anywhere => 1}, 269: pong => {anywhere => 1}, 270: pushfile => {manageronly => 1}, 271: put => {remote => 1, enroll => 1, domroles => 1, msg => 1, content => 1, shared => 1}, 272: putdom => {remote => 1, domroles => 1,}, 273: putstore => {remote => 1, enroll => 1}, 274: queryreply => {anywhere => 1}, 275: querysend => {anywhere => 1}, 276: querysend_activitylog => {remote => 1}, 277: querysend_allusers => {remote => 1, domroles => 1}, 278: querysend_courselog => {remote => 1}, 279: querysend_fetchenrollment => {remote => 1}, 280: querysend_getinstuser => {remote => 1}, 281: querysend_getmultinstusers => {remote => 1}, 282: querysend_instdirsearch => {remote => 1, domroles => 1, coaurem => 1}, 283: querysend_institutionalphotos => {remote => 1}, 284: querysend_portfolio_metadata => {remote => 1, content => 1}, 285: querysend_userlog => {remote => 1, domroles => 1}, 286: querysend_usersearch => {remote => 1, enroll => 1, coaurem => 1}, 287: quit => {anywhere => 1}, 288: readlonnetglobal => {institutiononly => 1}, 289: reinit => {manageronly => 1}, #not used currently 290: removeuserfile => {remote => 1, enroll => 1}, 291: renameuserfile => {remote => 1,}, 292: restore => {remote => 1, enroll => 1, reqcrs => 1,}, 293: rolesdel => {remote => 1, enroll => 1, domroles => 1, coaurem => 1}, 294: rolesput => {remote => 1, enroll => 1, domroles => 1, coaurem => 1}, 295: servercerts => {institutiononly => 1}, 296: serverdistarch => {anywhere => 1}, 297: serverhomeID => {anywhere => 1}, 298: serverloncaparev => {anywhere => 1}, 299: servertimezone => {remote => 1, enroll => 1}, 300: setannounce => {remote => 1, domroles => 1}, 301: sethost => {anywhere => 1}, 302: store => {remote => 1, enroll => 1, reqcrs => 1,}, 303: studentphoto => {remote => 1, enroll => 1}, 304: sub => {content => 1,}, 305: tmpdel => {institutiononly => 1}, 306: tmpget => {institutiononly => 1}, 307: tmpput => {remote => 1, othcoau => 1}, 308: tokenauthuserfile => {anywhere => 1}, 309: unsub => {content => 1,}, 310: update => {shared => 1}, 311: updateclickers => {remote => 1}, 312: userhassession => {anywhere => 1}, 313: userload => {anywhere => 1}, 314: version => {anywhere => 1}, #not used 315: ); 316: 317: # 318: # Statistics that are maintained and dislayed in the status line. 319: # 320: my $Transactions = 0; # Number of attempted transactions. 321: my $Failures = 0; # Number of transcations failed. 322: 323: # ResetStatistics: 324: # Resets the statistics counters: 325: # 326: sub ResetStatistics { 327: $Transactions = 0; 328: $Failures = 0; 329: } 330: 331: #------------------------------------------------------------------------ 332: # 333: # LocalConnection 334: # Completes the formation of a locally authenticated connection. 335: # This function will ensure that the 'remote' client is really the 336: # local host. If not, the connection is closed, and the function fails. 337: # If so, initcmd is parsed for the name of a file containing the 338: # IDEA session key. The fie is opened, read, deleted and the session 339: # key returned to the caller. 340: # 341: # Parameters: 342: # $Socket - Socket open on client. 343: # $initcmd - The full text of the init command. 344: # 345: # Returns: 346: # IDEA session key on success. 347: # undef on failure. 348: # 349: sub LocalConnection { 350: my ($Socket, $initcmd) = @_; 351: Debug("Attempting local connection: $initcmd client: $clientip"); 352: if($clientip ne "127.0.0.1") { 353: &logthis(' LocalConnection rejecting non local: ' 354: ."$clientip ne 127.0.0.1 "); 355: close $Socket; 356: return undef; 357: } else { 358: chomp($initcmd); # Get rid of \n in filename. 359: my ($init, $type, $name) = split(/:/, $initcmd); 360: Debug(" Init command: $init $type $name "); 361: 362: # Require that $init = init, and $type = local: Otherwise 363: # the caller is insane: 364: 365: if(($init ne "init") && ($type ne "local")) { 366: &logthis(' LocalConnection: caller is insane! ' 367: ."init = $init, and type = $type "); 368: close($Socket);; 369: return undef; 370: 371: } 372: # Now get the key filename: 373: 374: my $IDEAKey = lonlocal::ReadKeyFile($name); 375: return $IDEAKey; 376: } 377: } 378: #------------------------------------------------------------------------------ 379: # 380: # SSLConnection 381: # Completes the formation of an ssh authenticated connection. The 382: # socket is promoted to an ssl socket. If this promotion and the associated 383: # certificate exchange are successful, the IDEA key is generated and sent 384: # to the remote peer via the SSL tunnel. The IDEA key is also returned to 385: # the caller after the SSL tunnel is torn down. 386: # 387: # Parameters: 388: # Name Type Purpose 389: # $Socket IO::Socket::INET Plaintext socket. 390: # 391: # Returns: 392: # IDEA key on success. 393: # undef on failure. 394: # 395: sub SSLConnection { 396: my $Socket = shift; 397: 398: Debug("SSLConnection: "); 399: my $KeyFile = lonssl::KeyFile(); 400: if(!$KeyFile) { 401: my $err = lonssl::LastError(); 402: &logthis(" CRITICAL" 403: ."Can't get key file $err "); 404: return undef; 405: } 406: my ($CACertificate, 407: $Certificate) = lonssl::CertificateFile(); 408: 409: 410: # If any of the key, certificate or certificate authority 411: # certificate filenames are not defined, this can't work. 412: 413: if((!$Certificate) || (!$CACertificate)) { 414: my $err = lonssl::LastError(); 415: &logthis(" CRITICAL" 416: ."Can't get certificates: $err "); 417: 418: return undef; 419: } 420: Debug("Key: $KeyFile CA: $CACertificate Cert: $Certificate"); 421: 422: # Indicate to our peer that we can procede with 423: # a transition to ssl authentication: 424: 425: print $Socket "ok:ssl\n"; 426: 427: Debug("Approving promotion -> ssl"); 428: # And do so: 429: 430: my $CRLFile; 431: unless ($crlchecked{$clientname}) { 432: $CRLFile = lonssl::CRLFile(); 433: $crlchecked{$clientname} = 1; 434: } 435: 436: my $SSLSocket = lonssl::PromoteServerSocket($Socket, 437: $CACertificate, 438: $Certificate, 439: $KeyFile, 440: $clientname, 441: $CRLFile, 442: $clientversion); 443: if(! ($SSLSocket) ) { # SSL socket promotion failed. 444: my $err = lonssl::LastError(); 445: &logthis(" CRITICAL " 446: ."SSL Socket promotion failed: $err "); 447: return undef; 448: } 449: Debug("SSL Promotion successful"); 450: 451: # 452: # The only thing we'll use the socket for is to send the IDEA key 453: # to the peer: 454: 455: my $Key = lonlocal::CreateCipherKey(); 456: print $SSLSocket "$Key\n"; 457: 458: lonssl::Close($SSLSocket); 459: 460: Debug("Key exchange complete: $Key"); 461: 462: return $Key; 463: } 464: # 465: # InsecureConnection: 466: # If insecure connections are allowd, 467: # exchange a challenge with the client to 'validate' the 468: # client (not really, but that's the protocol): 469: # We produce a challenge string that's sent to the client. 470: # The client must then echo the challenge verbatim to us. 471: # 472: # Parameter: 473: # Socket - Socket open on the client. 474: # Returns: 475: # 1 - success. 476: # 0 - failure (e.g.mismatch or insecure not allowed). 477: # 478: sub InsecureConnection { 479: my $Socket = shift; 480: 481: # Don't even start if insecure connections are not allowed. 482: # return 0 if Insecure connections not allowed. 483: # 484: if (ref($secureconf{'connfrom'}) eq 'HASH') { 485: if ($clientsamedom) { 486: if ($secureconf{'connfrom'}{'dom'} eq 'req') { 487: return 0; 488: } 489: } elsif ($clientsameinst) { 490: if ($secureconf{'connfrom'}{'intdom'} eq 'req') { 491: return 0; 492: } 493: } else { 494: if ($secureconf{'connfrom'}{'other'} eq 'req') { 495: return 0; 496: } 497: } 498: } elsif (!$perlvar{londAllowInsecure}) { 499: return 0; 500: } 501: 502: # Fabricate a challenge string and send it.. 503: 504: my $challenge = "$$".time; # pid + time. 505: print $Socket "$challenge\n"; 506: &status("Waiting for challenge reply"); 507: 508: my $answer = <$Socket>; 509: $answer =~s/\W//g; 510: if($challenge eq $answer) { 511: return 1; 512: } else { 513: logthis("WARNING client did not respond to challenge"); 514: &status("No challenge reqply"); 515: return 0; 516: } 517: 518: 519: } 520: # 521: # Safely execute a command (as long as it's not a shel command and doesn 522: # not require/rely on shell escapes. The function operates by doing a 523: # a pipe based fork and capturing stdout and stderr from the pipe. 524: # 525: # Formal Parameters: 526: # $line - A line of text to be executed as a command. 527: # Returns: 528: # The output from that command. If the output is multiline the caller 529: # must know how to split up the output. 530: # 531: # 532: sub execute_command { 533: my ($line) = @_; 534: my @words = split(/\s/, $line); # Bust the command up into words. 535: my $output = ""; 536: 537: my $pid = open(CHILD, "-|"); 538: 539: if($pid) { # Parent process 540: Debug("In parent process for execute_command"); 541: my @data = <CHILD>; # Read the child's outupt... 542: close CHILD; 543: foreach my $output_line (@data) { 544: Debug("Adding $output_line"); 545: $output .= $output_line; # Presumably has a \n on it. 546: } 547: 548: } else { # Child process 549: close (STDERR); 550: open (STDERR, ">&STDOUT");# Combine stderr, and stdout... 551: exec(@words); # won't return. 552: } 553: return $output; 554: } 555: 556: 557: # GetCertificate: Given a transaction that requires a certificate, 558: # this function will extract the certificate from the transaction 559: # request. Note that at this point, the only concept of a certificate 560: # is the hostname to which we are connected. 561: # 562: # Parameter: 563: # request - The request sent by our client (this parameterization may 564: # need to change when we really use a certificate granting 565: # authority. 566: # 567: sub GetCertificate { 568: my $request = shift; 569: 570: return $clientip; 571: } 572: 573: # 574: # Return true if client is a manager. 575: # 576: sub isManager { 577: return (($ConnectionType eq "manager") || ($ConnectionType eq "both")); 578: } 579: # 580: # Return tru if client can do client functions 581: # 582: sub isClient { 583: return (($ConnectionType eq "client") || ($ConnectionType eq "both")); 584: } 585: 586: 587: # 588: # ReadManagerTable: Reads in the current manager table. For now this is 589: # done on each manager authentication because: 590: # - These authentications are not frequent 591: # - This allows dynamic changes to the manager table 592: # without the need to signal to the lond. 593: # 594: sub ReadManagerTable { 595: 596: &Debug("Reading manager table"); 597: # Clean out the old table first.. 598: 599: foreach my $key (keys %managers) { 600: delete $managers{$key}; 601: } 602: 603: my $tablename = $perlvar{'lonTabDir'}."/managers.tab"; 604: if (!open (MANAGERS, $tablename)) { 605: my $hostname = &Apache::lonnet::hostname($perlvar{'lonHostID'}); 606: if (&Apache::lonnet::is_LC_dns($hostname)) { 607: &logthis('No manager table. Nobody can manage!!'); 608: } 609: return; 610: } 611: while(my $host = <MANAGERS>) { 612: chomp($host); 613: if ($host =~ "^#") { # Comment line. 614: next; 615: } 616: if (!defined &Apache::lonnet::get_host_ip($host)) { # This is a non cluster member 617: # The entry is of the form: 618: # cluname:hostname 619: # cluname - A 'cluster hostname' is needed in order to negotiate 620: # the host key. 621: # hostname- The dns name of the host. 622: # 623: my($cluname, $dnsname) = split(/:/, $host); 624: 625: my $ip = gethostbyname($dnsname); 626: if(defined($ip)) { # bad names don't deserve entry. 627: my $hostip = inet_ntoa($ip); 628: $managers{$hostip} = $cluname; 629: logthis(' registering manager '. 630: "$dnsname as $cluname with $hostip \n"); 631: } 632: } else { 633: logthis(' existing host'." $host\n"); 634: $managers{&Apache::lonnet::get_host_ip($host)} = $host; # Use info from cluster tab if cluster memeber 635: } 636: } 637: } 638: 639: # 640: # ValidManager: Determines if a given certificate represents a valid manager. 641: # in this primitive implementation, the 'certificate' is 642: # just the connecting loncapa client name. This is checked 643: # against a valid client list in the configuration. 644: # 645: # 646: sub ValidManager { 647: my $certificate = shift; 648: 649: return isManager; 650: } 651: # 652: # CopyFile: Called as part of the process of installing a 653: # new configuration file. This function copies an existing 654: # file to a backup file. 655: # Parameters: 656: # oldfile - Name of the file to backup. 657: # newfile - Name of the backup file. 658: # Return: 659: # 0 - Failure (errno has failure reason). 660: # 1 - Success. 661: # 662: sub CopyFile { 663: 664: my ($oldfile, $newfile) = @_; 665: 666: if (! copy($oldfile,$newfile)) { 667: return 0; 668: } 669: chmod(0660, $newfile); 670: return 1; 671: } 672: # 673: # Host files are passed out with externally visible host IPs. 674: # If, for example, we are behind a fire-wall or NAT host, our 675: # internally visible IP may be different than the externally 676: # visible IP. Therefore, we always adjust the contents of the 677: # host file so that the entry for ME is the IP that we believe 678: # we have. At present, this is defined as the entry that 679: # DNS has for us. If by some chance we are not able to get a 680: # DNS translation for us, then we assume that the host.tab file 681: # is correct. 682: # BUGBUGBUG - in the future, we really should see if we can 683: # easily query the interface(s) instead. 684: # Parameter(s): 685: # contents - The contents of the host.tab to check. 686: # Returns: 687: # newcontents - The adjusted contents. 688: # 689: # 690: sub AdjustHostContents { 691: my $contents = shift; 692: my $adjusted; 693: my $me = $perlvar{'lonHostID'}; 694: 695: foreach my $line (split(/\n/,$contents)) { 696: if(!(($line eq "") || ($line =~ /^ *\#/) || ($line =~ /^ *$/) || 697: ($line =~ /^\s*\^/))) { 698: chomp($line); 699: my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon)=split(/:/,$line); 700: if ($id eq $me) { 701: my $ip = gethostbyname($name); 702: my $ipnew = inet_ntoa($ip); 703: $ip = $ipnew; 704: # Reconstruct the host line and append to adjusted: 705: 706: my $newline = "$id:$domain:$role:$name:$ip"; 707: if($maxcon ne "") { # Not all hosts have loncnew tuning params 708: $newline .= ":$maxcon:$idleto:$mincon"; 709: } 710: $adjusted .= $newline."\n"; 711: 712: } else { # Not me, pass unmodified. 713: $adjusted .= $line."\n"; 714: } 715: } else { # Blank or comment never re-written. 716: $adjusted .= $line."\n"; # Pass blanks and comments as is. 717: } 718: } 719: return $adjusted; 720: } 721: # 722: # InstallFile: Called to install an administrative file: 723: # - The file is created int a temp directory called <name>.tmp 724: # - lcinstall file is called to install the file. 725: # since the web app has no direct write access to the table directory 726: # 727: # Parameters: 728: # Name of the file 729: # File Contents. 730: # Return: 731: # nonzero - success. 732: # 0 - failure and $! has an errno. 733: # Assumptions: 734: # File installtion is a relatively infrequent 735: # 736: sub InstallFile { 737: 738: my ($Filename, $Contents) = @_; 739: # my $TempFile = $Filename.".tmp"; 740: my $exedir = $perlvar{'lonDaemons'}; 741: my $tmpdir = $exedir.'/tmp/'; 742: my $TempFile = $tmpdir."TempTableFile.tmp"; 743: 744: # Open the file for write: 745: 746: my $fh = IO::File->new("> $TempFile"); # Write to temp. 747: if(!(defined $fh)) { 748: &logthis(' Unable to create '.$TempFile.""); 749: return 0; 750: } 751: # write the contents of the file: 752: 753: print $fh ($Contents); 754: $fh->close; # In case we ever have a filesystem w. locking 755: 756: chmod(0664, $TempFile); # Everyone can write it. 757: 758: # Use lcinstall file to put the file in the table directory... 759: 760: &Debug("Opening pipe to $exedir/lcinstallfile $TempFile $Filename"); 761: my $pf = IO::File->new("| $exedir/lcinstallfile $TempFile $Filename > $exedir/logs/lcinstallfile.log"); 762: close $pf; 763: my $err = $?; 764: &Debug("Status is $err"); 765: if ($err != 0) { 766: my $msg = $err; 767: if ($err < @installerrors) { 768: $msg = $installerrors[$err]; 769: } 770: &logthis("Install failed for table file $Filename : $msg"); 771: return 0; 772: } 773: 774: # Remove the temp file: 775: 776: unlink($TempFile); 777: 778: return 1; 779: } 780: 781: 782: # 783: # ConfigFileFromSelector: converts a configuration file selector 784: # into a configuration file pathname. 785: # Supports the following file selectors: 786: # hosts, domain, dns_hosts, dns_domain 787: # 788: # 789: # Parameters: 790: # selector - Configuration file selector. 791: # Returns: 792: # Full path to the file or undef if the selector is invalid. 793: # 794: sub ConfigFileFromSelector { 795: my $selector = shift; 796: my $tablefile; 797: 798: if ($selector eq 'loncapaCAcrl') { 799: my $tabledir = $perlvar{'lonCertificateDirectory'}; 800: if (-d $tabledir) { 801: $tablefile = $tabledir.'/'.$selector.'.pem'; 802: } 803: } else { 804: my $tabledir = $perlvar{'lonTabDir'}.'/'; 805: if (($selector eq "hosts") || ($selector eq "domain") || 806: ($selector eq "dns_hosts") || ($selector eq "dns_domain")) { 807: $tablefile = $tabledir.$selector.'.tab'; 808: } 809: } 810: return $tablefile; 811: } 812: # 813: # PushFile: Called to do an administrative push of a file. 814: # - Ensure the file being pushed is one we support. 815: # - Backup the old file to <filename.saved> 816: # - Separate the contents of the new file out from the 817: # rest of the request. 818: # - Write the new file. 819: # Parameter: 820: # Request - The entire user request. This consists of a : separated 821: # string pushfile:tablename:contents. 822: # NOTE: The contents may have :'s in it as well making things a bit 823: # more interesting... but not much. 824: # Returns: 825: # String to send to client ("ok" or "refused" if bad file). 826: # 827: sub PushFile { 828: my $request = shift; 829: my ($command, $filename, $contents) = split(":", $request, 3); 830: &Debug("PushFile"); 831: 832: # At this point in time, pushes for only the following tables and 833: # CRL file are supported: 834: # hosts.tab ($filename eq host). 835: # domain.tab ($filename eq domain). 836: # dns_hosts.tab ($filename eq dns_host). 837: # dns_domain.tab ($filename eq dns_domain). 838: # loncapaCAcrl.pem ($filename eq loncapaCAcrl). 839: # Construct the destination filename or reject the request. 840: # 841: # lonManage is supposed to ensure this, however this session could be 842: # part of some elaborate spoof that managed somehow to authenticate. 843: # 844: 845: 846: my $tablefile = ConfigFileFromSelector($filename); 847: if(! (defined $tablefile)) { 848: return "refused"; 849: } 850: 851: # If the file being pushed is the host file, we adjust the entry for ourself so that the 852: # IP will be our current IP as looked up in dns. Note this is only 99% good as it's possible 853: # to conceive of conditions where we don't have a DNS entry locally. This is possible in a 854: # network sense but it doesn't make much sense in a LonCAPA sense so we ignore (for now) 855: # that possibilty. 856: 857: if($filename eq "host") { 858: $contents = AdjustHostContents($contents); 859: } elsif (($filename eq 'dns_host') || ($filename eq 'dns_domain') || 860: ($filename eq 'loncapaCAcrl')) { 861: if ($contents eq '') { 862: &logthis(' Pushfile: unable to install ' 863: .$tablefile." - no data received from push. "); 864: return 'error: push had no data'; 865: } 866: if (&Apache::lonnet::get_host_ip($clientname)) { 867: my $clienthost = &Apache::lonnet::hostname($clientname); 868: if ($managers{$clientip} eq $clientname) { 869: my $clientprotocol = $Apache::lonnet::protocol{$clientname}; 870: $clientprotocol = 'http' if ($clientprotocol ne 'https'); 871: my $url; 872: if ($filename eq 'loncapaCAcrl') { 873: $url = '/adm/dns/loncapaCRL'; 874: } else { 875: $url = '/adm/'.$filename; 876: $url =~ s{_}{/}; 877: } 878: my $request=new HTTP::Request('GET',"$clientprotocol://$clienthost$url"); 879: my $response = LONCAPA::LWPReq::makerequest($clientname,$request,'',\%perlvar,60,0); 880: if ($response->is_error()) { 881: &logthis(' Pushfile: unable to install ' 882: .$tablefile." - error attempting to pull data. "); 883: return 'error: pull failed'; 884: } else { 885: my $result = $response->content; 886: chomp($result); 887: unless ($result eq $contents) { 888: &logthis(' Pushfile: unable to install ' 889: .$tablefile." - pushed data and pulled data differ. "); 890: my $pushleng = length($contents); 891: my $pullleng = length($result); 892: if ($pushleng != $pullleng) { 893: return "error: $pushleng vs $pullleng bytes"; 894: } else { 895: return "error: mismatch push and pull"; 896: } 897: } 898: } 899: } 900: } 901: } 902: 903: # Install the new file: 904: 905: &logthis("Installing new $tablefile contents:\n$contents"); 906: if(!InstallFile($tablefile, $contents)) { 907: &logthis(' Pushfile: unable to install ' 908: .$tablefile." $! "); 909: return "error:$!"; 910: } else { 911: &logthis(' Installed new '.$tablefile 912: ." - transaction by: $clientname ($clientip)"); 913: my $adminmail = $perlvar{'lonAdmEMail'}; 914: my $admindom = &Apache::lonnet::host_domain($perlvar{'lonHostID'}); 915: if ($admindom ne '') { 916: my %domconfig = 917: &Apache::lonnet::get_dom('configuration',['contacts'],$admindom); 918: if (ref($domconfig{'contacts'}) eq 'HASH') { 919: if ($domconfig{'contacts'}{'adminemail'} ne '') { 920: $adminmail = $domconfig{'contacts'}{'adminemail'}; 921: } 922: } 923: } 924: if ($adminmail =~ /^[^\@]+\@[^\@]+$/) { 925: my $msg = new Mail::Send; 926: $msg->to($adminmail); 927: $msg->subject('LON-CAPA DNS update on '.$perlvar{'lonHostID'}); 928: $msg->add('Content-type','text/plain; charset=UTF-8'); 929: if (my $fh = $msg->open()) { 930: print $fh 'Update to '.$tablefile.' from Cluster Manager '. 931: "$clientname ($clientip)\n"; 932: $fh->close; 933: } 934: } 935: } 936: 937: # Indicate success: 938: 939: return "ok"; 940: 941: } 942: 943: # 944: # Called to re-init either lonc or lond. 945: # 946: # Parameters: 947: # request - The full request by the client. This is of the form 948: # reinit:<process> 949: # where <process> is allowed to be either of 950: # lonc or lond 951: # 952: # Returns: 953: # The string to be sent back to the client either: 954: # ok - Everything worked just fine. 955: # error:why - There was a failure and why describes the reason. 956: # 957: # 958: sub ReinitProcess { 959: my $request = shift; 960: 961: 962: # separate the request (reinit) from the process identifier and 963: # validate it producing the name of the .pid file for the process. 964: # 965: # 966: my ($junk, $process) = split(":", $request); 967: my $processpidfile = $perlvar{'lonDaemons'}.'/logs/'; 968: if($process eq 'lonc') { 969: $processpidfile = $processpidfile."lonc.pid"; 970: if (!open(PIDFILE, "< $processpidfile")) { 971: return "error:Open failed for $processpidfile"; 972: } 973: my $loncpid = <PIDFILE>; 974: close(PIDFILE); 975: logthis(' Reinitializing lonc pid='.$loncpid 976: .""); 977: kill("USR2", $loncpid); 978: } elsif ($process eq 'lond') { 979: logthis(' Reinitializing self (lond) '); 980: &UpdateHosts; # Lond is us!! 981: } else { 982: &logthis('"); 984: return "error:Invalid process identifier $process"; 985: } 986: return 'ok'; 987: } 988: # Validate a line in a configuration file edit script: 989: # Validation includes: 990: # - Ensuring the command is valid. 991: # - Ensuring the command has sufficient parameters 992: # Parameters: 993: # scriptline - A line to validate (\n has been stripped for what it's worth). 994: # 995: # Return: 996: # 0 - Invalid scriptline. 997: # 1 - Valid scriptline 998: # NOTE: 999: # Only the command syntax is checked, not the executability of the 1000: # command. 1001: # 1002: sub isValidEditCommand { 1003: my $scriptline = shift; 1004: 1005: # Line elements are pipe separated: 1006: 1007: my ($command, $key, $newline) = split(/\|/, $scriptline); 1008: &logthis(' isValideditCommand checking: '. 1009: "Command = '$command', Key = '$key', Newline = '$newline' \n"); 1010: 1011: if ($command eq "delete") { 1012: # 1013: # key with no newline. 1014: # 1015: if( ($key eq "") || ($newline ne "")) { 1016: return 0; # Must have key but no newline. 1017: } else { 1018: return 1; # Valid syntax. 1019: } 1020: } elsif ($command eq "replace") { 1021: # 1022: # key and newline: 1023: # 1024: if (($key eq "") || ($newline eq "")) { 1025: return 0; 1026: } else { 1027: return 1; 1028: } 1029: } elsif ($command eq "append") { 1030: if (($key ne "") && ($newline eq "")) { 1031: return 1; 1032: } else { 1033: return 0; 1034: } 1035: } else { 1036: return 0; # Invalid command. 1037: } 1038: return 0; # Should not get here!!! 1039: } 1040: # 1041: # ApplyEdit - Applies an edit command to a line in a configuration 1042: # file. It is the caller's responsiblity to validate the 1043: # edit line. 1044: # Parameters: 1045: # $directive - A single edit directive to apply. 1046: # Edit directives are of the form: 1047: # append|newline - Appends a new line to the file. 1048: # replace|key|newline - Replaces the line with key value 'key' 1049: # delete|key - Deletes the line with key value 'key'. 1050: # $editor - A config file editor object that contains the 1051: # file being edited. 1052: # 1053: sub ApplyEdit { 1054: 1055: my ($directive, $editor) = @_; 1056: 1057: # Break the directive down into its command and its parameters 1058: # (at most two at this point. The meaning of the parameters, if in fact 1059: # they exist depends on the command). 1060: 1061: my ($command, $p1, $p2) = split(/\|/, $directive); 1062: 1063: if($command eq "append") { 1064: $editor->Append($p1); # p1 - key p2 null. 1065: } elsif ($command eq "replace") { 1066: $editor->ReplaceLine($p1, $p2); # p1 - key p2 = newline. 1067: } elsif ($command eq "delete") { 1068: $editor->DeleteLine($p1); # p1 - key p2 null. 1069: } else { # Should not get here!!! 1070: die "Invalid command given to ApplyEdit $command" 1071: } 1072: } 1073: # 1074: # AdjustOurHost: 1075: # Adjusts a host file stored in a configuration file editor object 1076: # for the true IP address of this host. This is necessary for hosts 1077: # that live behind a firewall. 1078: # Those hosts have a publicly distributed IP of the firewall, but 1079: # internally must use their actual IP. We assume that a given 1080: # host only has a single IP interface for now. 1081: # Formal Parameters: 1082: # editor - The configuration file editor to adjust. This 1083: # editor is assumed to contain a hosts.tab file. 1084: # Strategy: 1085: # - Figure out our hostname. 1086: # - Lookup the entry for this host. 1087: # - Modify the line to contain our IP 1088: # - Do a replace for this host. 1089: sub AdjustOurHost { 1090: my $editor = shift; 1091: 1092: # figure out who I am. 1093: 1094: my $myHostName = $perlvar{'lonHostID'}; # LonCAPA hostname. 1095: 1096: # Get my host file entry. 1097: 1098: my $ConfigLine = $editor->Find($myHostName); 1099: if(! (defined $ConfigLine)) { 1100: die "AdjustOurHost - no entry for me in hosts file $myHostName"; 1101: } 1102: # figure out my IP: 1103: # Use the config line to get my hostname. 1104: # Use gethostbyname to translate that into an IP address. 1105: # 1106: my ($id,$domain,$role,$name,$maxcon,$idleto,$mincon) = split(/:/,$ConfigLine); 1107: # 1108: # Reassemble the config line from the elements in the list. 1109: # Note that if the loncnew items were not present before, they will 1110: # be now even if they would be empty 1111: # 1112: my $newConfigLine = $id; 1113: foreach my $item ($domain, $role, $name, $maxcon, $idleto, $mincon) { 1114: $newConfigLine .= ":".$item; 1115: } 1116: # Replace the line: 1117: 1118: $editor->ReplaceLine($id, $newConfigLine); 1119: 1120: } 1121: # 1122: # ReplaceConfigFile: 1123: # Replaces a configuration file with the contents of a 1124: # configuration file editor object. 1125: # This is done by: 1126: # - Copying the target file to <filename>.old 1127: # - Writing the new file to <filename>.tmp 1128: # - Moving <filename.tmp> -> <filename> 1129: # This laborious process ensures that the system is never without 1130: # a configuration file that's at least valid (even if the contents 1131: # may be dated). 1132: # Parameters: 1133: # filename - Name of the file to modify... this is a full path. 1134: # editor - Editor containing the file. 1135: # 1136: sub ReplaceConfigFile { 1137: 1138: my ($filename, $editor) = @_; 1139: 1140: CopyFile ($filename, $filename.".old"); 1141: 1142: my $contents = $editor->Get(); # Get the contents of the file. 1143: 1144: InstallFile($filename, $contents); 1145: } 1146: # 1147: # 1148: # Called to edit a configuration table file 1149: # Parameters: 1150: # request - The entire command/request sent by lonc or lonManage 1151: # Return: 1152: # The reply to send to the client. 1153: # 1154: sub EditFile { 1155: my $request = shift; 1156: 1157: # Split the command into it's pieces: edit:filetype:script 1158: 1159: my ($cmd, $filetype, $script) = split(/:/, $request,3); # : in script 1160: 1161: # Check the pre-coditions for success: 1162: 1163: if($cmd != "edit") { # Something is amiss afoot alack. 1164: return "error:edit request detected, but request != 'edit'\n"; 1165: } 1166: if( ($filetype ne "hosts") && 1167: ($filetype ne "domain")) { 1168: return "error:edit requested with invalid file specifier: $filetype \n"; 1169: } 1170: 1171: # Split the edit script and check it's validity. 1172: 1173: my @scriptlines = split(/\n/, $script); # one line per element. 1174: my $linecount = scalar(@scriptlines); 1175: for(my $i = 0; $i < $linecount; $i++) { 1176: chomp($scriptlines[$i]); 1177: if(!isValidEditCommand($scriptlines[$i])) { 1178: return "error:edit with bad script line: '$scriptlines[$i]' \n"; 1179: } 1180: } 1181: 1182: # Execute the edit operation. 1183: # - Create a config file editor for the appropriate file and 1184: # - execute each command in the script: 1185: # 1186: my $configfile = ConfigFileFromSelector($filetype); 1187: if (!(defined $configfile)) { 1188: return "refused\n"; 1189: } 1190: my $editor = ConfigFileEdit->new($configfile); 1191: 1192: for (my $i = 0; $i < $linecount; $i++) { 1193: ApplyEdit($scriptlines[$i], $editor); 1194: } 1195: # If the file is the host file, ensure that our host is 1196: # adjusted to have our ip: 1197: # 1198: if($filetype eq "host") { 1199: AdjustOurHost($editor); 1200: } 1201: # Finally replace the current file with our file. 1202: # 1203: ReplaceConfigFile($configfile, $editor); 1204: 1205: return "ok\n"; 1206: } 1207: 1208: # read_profile 1209: # 1210: # Returns a set of specific entries from a user's profile file. 1211: # this is a utility function that is used by both get_profile_entry and 1212: # get_profile_entry_encrypted. 1213: # 1214: # Parameters: 1215: # udom - Domain in which the user exists. 1216: # uname - User's account name (loncapa account) 1217: # namespace - The profile namespace to open. 1218: # what - A set of & separated queries. 1219: # Returns: 1220: # If all ok: - The string that needs to be shipped back to the user. 1221: # If failure - A string that starts with error: followed by the failure 1222: # reason.. note that this probabyl gets shipped back to the 1223: # user as well. 1224: # 1225: sub read_profile { 1226: my ($udom, $uname, $namespace, $what) = @_; 1227: 1228: my $hashref = &tie_user_hash($udom, $uname, $namespace, 1229: &GDBM_READER()); 1230: if ($hashref) { 1231: my @queries=split(/\&/,$what); 1232: if ($namespace eq 'roles') { 1233: @queries = map { &unescape($_); } @queries; 1234: } 1235: my $qresult=''; 1236: 1237: for (my $i=0;$i<=$#queries;$i++) { 1238: $qresult.="$hashref->{$queries[$i]}&"; # Presumably failure gives empty string. 1239: } 1240: $qresult=~s/\&$//; # Remove trailing & from last lookup. 1241: if (&untie_user_hash($hashref)) { 1242: return $qresult; 1243: } else { 1244: return "error: ".($!+0)." untie (GDBM) Failed"; 1245: } 1246: } else { 1247: if ($!+0 == 2) { 1248: return "error:No such file or GDBM reported bad block error"; 1249: } else { 1250: return "error: ".($!+0)." tie (GDBM) Failed"; 1251: } 1252: } 1253: 1254: } 1255: #--------------------- Request Handlers -------------------------------------------- 1256: # 1257: # By convention each request handler registers itself prior to the sub 1258: # declaration: 1259: # 1260: 1261: #++ 1262: # 1263: # Handles ping requests. 1264: # Parameters: 1265: # $cmd - the actual keyword that invoked us. 1266: # $tail - the tail of the request that invoked us. 1267: # $replyfd- File descriptor connected to the client 1268: # Implicit Inputs: 1269: # $currenthostid - Global variable that carries the name of the host we are 1270: # known as. 1271: # Returns: 1272: # 1 - Ok to continue processing. 1273: # 0 - Program should exit. 1274: # Side effects: 1275: # Reply information is sent to the client. 1276: sub ping_handler { 1277: my ($cmd, $tail, $client) = @_; 1278: Debug("$cmd $tail $client .. $currenthostid:"); 1279: 1280: Reply( $client,\$currenthostid,"$cmd:$tail"); 1281: 1282: return 1; 1283: } 1284: &register_handler("ping", \&ping_handler, 0, 1, 1); # Ping unencoded, client or manager. 1285: 1286: #++ 1287: # 1288: # Handles pong requests. Pong replies with our current host id, and 1289: # the results of a ping sent to us via our lonc. 1290: # 1291: # Parameters: 1292: # $cmd - the actual keyword that invoked us. 1293: # $tail - the tail of the request that invoked us. 1294: # $replyfd- File descriptor connected to the client 1295: # Implicit Inputs: 1296: # $currenthostid - Global variable that carries the name of the host we are 1297: # connected to. 1298: # Returns: 1299: # 1 - Ok to continue processing. 1300: # 0 - Program should exit. 1301: # Side effects: 1302: # Reply information is sent to the client. 1303: sub pong_handler { 1304: my ($cmd, $tail, $replyfd) = @_; 1305: 1306: my $reply=&Apache::lonnet::reply("ping",$clientname); 1307: &Reply( $replyfd, "$currenthostid:$reply\n", "$cmd:$tail"); 1308: return 1; 1309: } 1310: &register_handler("pong", \&pong_handler, 0, 1, 1); # Pong unencoded, client or manager 1311: 1312: #++ 1313: # Called to establish an encrypted session key with the remote client. 1314: # Note that with secure lond, in most cases this function is never 1315: # invoked. Instead, the secure session key is established either 1316: # via a local file that's locked down tight and only lives for a short 1317: # time, or via an ssl tunnel...and is generated from a bunch-o-random 1318: # bits from /dev/urandom, rather than the predictable pattern used by 1319: # by this sub. This sub is only used in the old-style insecure 1320: # key negotiation. 1321: # Parameters: 1322: # $cmd - the actual keyword that invoked us. 1323: # $tail - the tail of the request that invoked us. 1324: # $replyfd- File descriptor connected to the client 1325: # Implicit Inputs: 1326: # $currenthostid - Global variable that carries the name of the host 1327: # known as. 1328: # $clientname - Global variable that carries the name of the host we're connected to. 1329: # Returns: 1330: # 1 - Ok to continue processing. 1331: # 0 - Program should exit. 1332: # Implicit Outputs: 1333: # Reply information is sent to the client. 1334: # $cipher is set with a reference to a new IDEA encryption object. 1335: # 1336: sub establish_key_handler { 1337: my ($cmd, $tail, $replyfd) = @_; 1338: 1339: my $buildkey=time.$$.int(rand 100000); 1340: $buildkey=~tr/1-6/A-F/; 1341: $buildkey=int(rand 100000).$buildkey.int(rand 100000); 1342: my $key=$currenthostid.$clientname; 1343: $key=~tr/a-z/A-Z/; 1344: $key=~tr/G-P/0-9/; 1345: $key=~tr/Q-Z/0-9/; 1346: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey; 1347: $key=substr($key,0,32); 1348: my $cipherkey=pack("H32",$key); 1349: $cipher=new IDEA $cipherkey; 1350: &Reply($replyfd, \$buildkey, "$cmd:$tail"); 1351: 1352: return 1; 1353: 1354: } 1355: &register_handler("ekey", \&establish_key_handler, 0, 1,1); 1356: 1357: # Handler for the load command. Returns the current system load average 1358: # to the requestor. 1359: # 1360: # Parameters: 1361: # $cmd - the actual keyword that invoked us. 1362: # $tail - the tail of the request that invoked us. 1363: # $replyfd- File descriptor connected to the client 1364: # Implicit Inputs: 1365: # $currenthostid - Global variable that carries the name of the host 1366: # known as. 1367: # $clientname - Global variable that carries the name of the host we're connected to. 1368: # Returns: 1369: # 1 - Ok to continue processing. 1370: # 0 - Program should exit. 1371: # Side effects: 1372: # Reply information is sent to the client. 1373: sub load_handler { 1374: my ($cmd, $tail, $replyfd) = @_; 1375: 1376: 1377: 1378: # Get the load average from /proc/loadavg and calculate it as a percentage of 1379: # the allowed load limit as set by the perl global variable lonLoadLim 1380: 1381: my $loadavg; 1382: my $loadfile=IO::File->new('/proc/loadavg'); 1383: 1384: $loadavg=<$loadfile>; 1385: $loadavg =~ s/\s.*//g; # Extract the first field only. 1386: 1387: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'}; 1388: 1389: &Reply( $replyfd, \$loadpercent, "$cmd:$tail"); 1390: 1391: return 1; 1392: } 1393: &register_handler("load", \&load_handler, 0, 1, 0); 1394: 1395: # 1396: # Process the userload request. This sub returns to the client the current 1397: # user load average. It can be invoked either by clients or managers. 1398: # 1399: # Parameters: 1400: # $cmd - the actual keyword that invoked us. 1401: # $tail - the tail of the request that invoked us. 1402: # $replyfd- File descriptor connected to the client 1403: # Implicit Inputs: 1404: # $currenthostid - Global variable that carries the name of the host 1405: # known as. 1406: # $clientname - Global variable that carries the name of the host we're connected to. 1407: # Returns: 1408: # 1 - Ok to continue processing. 1409: # 0 - Program should exit 1410: # Implicit inputs: 1411: # whatever the userload() function requires. 1412: # Implicit outputs: 1413: # the reply is written to the client. 1414: # 1415: sub user_load_handler { 1416: my ($cmd, $tail, $replyfd) = @_; 1417: 1418: my $userloadpercent=&Apache::lonnet::userload(); 1419: &Reply($replyfd, \$userloadpercent, "$cmd:$tail"); 1420: 1421: return 1; 1422: } 1423: &register_handler("userload", \&user_load_handler, 0, 1, 0); 1424: 1425: # Process a request for the authorization type of a user: 1426: # (userauth). 1427: # 1428: # Parameters: 1429: # $cmd - the actual keyword that invoked us. 1430: # $tail - the tail of the request that invoked us. 1431: # $replyfd- File descriptor connected to the client 1432: # Returns: 1433: # 1 - Ok to continue processing. 1434: # 0 - Program should exit 1435: # Implicit outputs: 1436: # The user authorization type is written to the client. 1437: # 1438: sub user_authorization_type { 1439: my ($cmd, $tail, $replyfd) = @_; 1440: 1441: my $userinput = "$cmd:$tail"; 1442: 1443: # Pull the domain and username out of the command tail. 1444: # and call get_auth_type to determine the authentication type. 1445: 1446: my ($udom,$uname)=split(/:/,$tail); 1447: my $result = &get_auth_type($udom, $uname); 1448: if($result eq "nouser") { 1449: &Failure( $replyfd, "unknown_user\n", $userinput); 1450: } else { 1451: # 1452: # We only want to pass the second field from get_auth_type 1453: # for ^krb.. otherwise we'll be handing out the encrypted 1454: # password for internals e.g. 1455: # 1456: my ($type,$otherinfo) = split(/:/,$result); 1457: if($type =~ /^krb/) { 1458: $type = $result; 1459: } else { 1460: $type .= ':'; 1461: } 1462: &Reply( $replyfd, \$type, $userinput); 1463: } 1464: 1465: return 1; 1466: } 1467: &register_handler("currentauth", \&user_authorization_type, 1, 1, 0); 1468: 1469: # Process a request by a manager to push a hosts or domain table 1470: # to us. We pick apart the command and pass it on to the subs 1471: # that already exist to do this. 1472: # 1473: # Parameters: 1474: # $cmd - the actual keyword that invoked us. 1475: # $tail - the tail of the request that invoked us. 1476: # $client - File descriptor connected to the client 1477: # Returns: 1478: # 1 - Ok to continue processing. 1479: # 0 - Program should exit 1480: # Implicit Output: 1481: # a reply is written to the client. 1482: sub push_file_handler { 1483: my ($cmd, $tail, $client) = @_; 1484: &Debug("In push file handler"); 1485: my $userinput = "$cmd:$tail"; 1486: 1487: # At this time we only know that the IP of our partner is a valid manager 1488: # the code below is a hook to do further authentication (e.g. to resolve 1489: # spoofing). 1490: 1491: my $cert = &GetCertificate($userinput); 1492: if(&ValidManager($cert)) { 1493: &Debug("Valid manager: $client"); 1494: 1495: # Now presumably we have the bona fides of both the peer host and the 1496: # process making the request. 1497: 1498: my $reply = &PushFile($userinput); 1499: &Reply($client, \$reply, $userinput); 1500: 1501: } else { 1502: &logthis("push_file_handler $client is not valid"); 1503: &Failure( $client, "refused\n", $userinput); 1504: } 1505: return 1; 1506: } 1507: &register_handler("pushfile", \&push_file_handler, 1, 0, 1); 1508: 1509: # The du_handler routine should be considered obsolete and is retained 1510: # for communication with legacy servers. Please see the du2_handler. 1511: # 1512: # du - list the disk usage of a directory recursively. 1513: # 1514: # note: stolen code from the ls file handler 1515: # under construction by Rick Banghart 1516: # . 1517: # Parameters: 1518: # $cmd - The command that dispatched us (du). 1519: # $ududir - The directory path to list... I'm not sure what this 1520: # is relative as things like ls:. return e.g. 1521: # no_such_dir. 1522: # $client - Socket open on the client. 1523: # Returns: 1524: # 1 - indicating that the daemon should not disconnect. 1525: # Side Effects: 1526: # The reply is written to $client. 1527: # 1528: sub du_handler { 1529: my ($cmd, $ududir, $client) = @_; 1530: ($ududir) = split(/:/,$ududir); # Make 'telnet' testing easier. 1531: my $userinput = "$cmd:$ududir"; 1532: 1533: if ($ududir=~/\.\./ || $ududir!~m|^/home/httpd/|) { 1534: &Failure($client,"refused\n","$cmd:$ududir"); 1535: return 1; 1536: } 1537: # Since $ududir could have some nasties in it, 1538: # we will require that ududir is a valid 1539: # directory. Just in case someone tries to 1540: # slip us a line like .;(cd /home/httpd rm -rf*) 1541: # etc. 1542: # 1543: if (-d $ududir) { 1544: my $total_size=0; 1545: my $code=sub { 1546: if ($_=~/\.\d+\./) { return;} 1547: if ($_=~/\.meta$/) { return;} 1548: if (-d $_) { return;} 1549: $total_size+=(stat($_))[7]; 1550: }; 1551: chdir($ududir); 1552: find($code,$ududir); 1553: $total_size=int($total_size/1024); 1554: &Reply($client,\$total_size,"$cmd:$ududir"); 1555: } else { 1556: &Failure($client, "bad_directory:$ududir\n","$cmd:$ududir"); 1557: } 1558: return 1; 1559: } 1560: &register_handler("du", \&du_handler, 0, 1, 0); 1561: 1562: # Please also see the du_handler, which is obsoleted by du2. 1563: # du2_handler differs from du_handler in that required path to directory 1564: # provided by &propath() is prepended in the handler instead of on the 1565: # client side. 1566: # 1567: # du2 - list the disk usage of a directory recursively. 1568: # 1569: # Parameters: 1570: # $cmd - The command that dispatched us (du). 1571: # $tail - The tail of the request that invoked us. 1572: # $tail is a : separated list of the following: 1573: # - $ududir - directory path to list (before prepending) 1574: # - $getpropath = 1 if &propath() should prepend 1575: # - $uname - username to use for &propath or user dir 1576: # - $udom - domain to use for &propath or user dir 1577: # All are escaped. 1578: # $client - Socket open on the client. 1579: # Returns: 1580: # 1 - indicating that the daemon should not disconnect. 1581: # Side Effects: 1582: # The reply is written to $client. 1583: # 1584: 1585: sub du2_handler { 1586: my ($cmd, $tail, $client) = @_; 1587: my ($ududir,$getpropath,$uname,$udom) = map { &unescape($_) } (split(/:/, $tail)); 1588: my $userinput = "$cmd:$tail"; 1589: if (($ududir=~/\.\./) || (($ududir!~m|^/home/httpd/|) && (!$getpropath))) { 1590: &Failure($client,"refused\n","$cmd:$tail"); 1591: return 1; 1592: } 1593: if ($getpropath) { 1594: if (($uname =~ /^$LONCAPA::match_name$/) && ($udom =~ /^$LONCAPA::match_domain$/)) { 1595: $ududir = &propath($udom,$uname).'/'.$ududir; 1596: } else { 1597: &Failure($client,"refused\n","$cmd:$tail"); 1598: return 1; 1599: } 1600: } 1601: # Since $ududir could have some nasties in it, 1602: # we will require that ududir is a valid 1603: # directory. Just in case someone tries to 1604: # slip us a line like .;(cd /home/httpd rm -rf*) 1605: # etc. 1606: # 1607: if (-d $ududir) { 1608: my $total_size=0; 1609: my $code=sub { 1610: if ($_=~/\.\d+\./) { return;} 1611: if ($_=~/\.meta$/) { return;} 1612: if (-d $_) { return;} 1613: $total_size+=(stat($_))[7]; 1614: }; 1615: chdir($ududir); 1616: find($code,$ududir); 1617: $total_size=int($total_size/1024); 1618: &Reply($client,\$total_size,"$cmd:$ududir"); 1619: } else { 1620: &Failure($client, "bad_directory:$ududir\n","$cmd:$tail"); 1621: } 1622: return 1; 1623: } 1624: &register_handler("du2", \&du2_handler, 0, 1, 0); 1625: 1626: # 1627: # The ls_handler routine should be considered obsolete and is retained 1628: # for communication with legacy servers. Please see the ls3_handler. 1629: # 1630: # ls - list the contents of a directory. For each file in the 1631: # selected directory the filename followed by the full output of 1632: # the stat function is returned. The returned info for each 1633: # file are separated by ':'. The stat fields are separated by &'s. 1634: # 1635: # If the requested path contains /../ or is: 1636: # 1637: # 1. for a directory, and the path does not begin with one of: 1638: # (a) /home/httpd/html/res/<domain> 1639: # (b) /home/httpd/html/userfiles/ 1640: # (c) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/userfiles 1641: # or is: 1642: # 1643: # 2. for a file, and the path (after prepending) does not begin with one of: 1644: # (a) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/ 1645: # (b) /home/httpd/html/res/<domain>/<username>/ 1646: # (c) /home/httpd/html/userfiles/<domain>/<username>/ 1647: # 1648: # the response will be "refused". 1649: # 1650: # Parameters: 1651: # $cmd - The command that dispatched us (ls). 1652: # $ulsdir - The directory path to list... I'm not sure what this 1653: # is relative as things like ls:. return e.g. 1654: # no_such_dir. 1655: # $client - Socket open on the client. 1656: # Returns: 1657: # 1 - indicating that the daemon should not disconnect. 1658: # Side Effects: 1659: # The reply is written to $client. 1660: # 1661: sub ls_handler { 1662: # obsoleted by ls2_handler 1663: my ($cmd, $ulsdir, $client) = @_; 1664: 1665: my $userinput = "$cmd:$ulsdir"; 1666: 1667: my $obs; 1668: my $rights; 1669: my $ulsout=''; 1670: my $ulsfn; 1671: if ($ulsdir =~m{/\.\./}) { 1672: &Failure($client,"refused\n",$userinput); 1673: return 1; 1674: } 1675: if (-e $ulsdir) { 1676: if(-d $ulsdir) { 1677: unless (($ulsdir =~ m{^/home/httpd/html/(res/$LONCAPA::match_domain|userfiles/)}) || 1678: ($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/userfiles})) { 1679: &Failure($client,"refused\n",$userinput); 1680: return 1; 1681: } 1682: if (opendir(LSDIR,$ulsdir)) { 1683: while ($ulsfn=readdir(LSDIR)) { 1684: undef($obs); 1685: undef($rights); 1686: my @ulsstats=stat($ulsdir.'/'.$ulsfn); 1687: #We do some obsolete checking here 1688: if(-e $ulsdir.'/'.$ulsfn.".meta") { 1689: open(FILE, $ulsdir.'/'.$ulsfn.".meta"); 1690: my @obsolete=<FILE>; 1691: foreach my $obsolete (@obsolete) { 1692: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; } 1693: if($obsolete =~ m|(<copyright>)(default)|) { $rights = 1; } 1694: } 1695: } 1696: $ulsout.=$ulsfn.'&'.join('&',@ulsstats); 1697: if($obs eq '1') { $ulsout.="&1"; } 1698: else { $ulsout.="&0"; } 1699: if($rights eq '1') { $ulsout.="&1:"; } 1700: else { $ulsout.="&0:"; } 1701: } 1702: closedir(LSDIR); 1703: } 1704: } else { 1705: unless (($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/}) || 1706: ($ulsdir =~ m{^/home/httpd/html/(?:res|userfiles)/$LONCAPA::match_domain/$LONCAPA::match_name/})) { 1707: &Failure($client,"refused\n",$userinput); 1708: return 1; 1709: } 1710: my @ulsstats=stat($ulsdir); 1711: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':'; 1712: } 1713: } else { 1714: $ulsout='no_such_dir'; 1715: } 1716: if ($ulsout eq '') { $ulsout='empty'; } 1717: &Reply($client, \$ulsout, $userinput); # This supports debug logging. 1718: 1719: return 1; 1720: 1721: } 1722: &register_handler("ls", \&ls_handler, 0, 1, 0); 1723: 1724: # The ls2_handler routine should be considered obsolete and is retained 1725: # for communication with legacy servers. Please see the ls3_handler. 1726: # Please also see the ls_handler, which was itself obsoleted by ls2. 1727: # ls2_handler differs from ls_handler in that it escapes its return 1728: # values before concatenating them together with ':'s. 1729: # 1730: # ls2 - list the contents of a directory. For each file in the 1731: # selected directory the filename followed by the full output of 1732: # the stat function is returned. The returned info for each 1733: # file are separated by ':'. The stat fields are separated by &'s. 1734: # 1735: # If the requested path contains /../ or is: 1736: # 1737: # 1. for a directory, and the path does not begin with one of: 1738: # (a) /home/httpd/html/res/<domain> 1739: # (b) /home/httpd/html/userfiles/ 1740: # (c) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/userfiles 1741: # or is: 1742: # 1743: # 2. for a file, and the path (after prepending) does not begin with one of: 1744: # (a) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/ 1745: # (b) /home/httpd/html/res/<domain>/<username>/ 1746: # (c) /home/httpd/html/userfiles/<domain>/<username>/ 1747: # 1748: # the response will be "refused". 1749: # 1750: # Parameters: 1751: # $cmd - The command that dispatched us (ls). 1752: # $ulsdir - The directory path to list... I'm not sure what this 1753: # is relative as things like ls:. return e.g. 1754: # no_such_dir. 1755: # $client - Socket open on the client. 1756: # Returns: 1757: # 1 - indicating that the daemon should not disconnect. 1758: # Side Effects: 1759: # The reply is written to $client. 1760: # 1761: sub ls2_handler { 1762: my ($cmd, $ulsdir, $client) = @_; 1763: 1764: my $userinput = "$cmd:$ulsdir"; 1765: 1766: my $obs; 1767: my $rights; 1768: my $ulsout=''; 1769: my $ulsfn; 1770: if ($ulsdir =~m{/\.\./}) { 1771: &Failure($client,"refused\n",$userinput); 1772: return 1; 1773: } 1774: if (-e $ulsdir) { 1775: if(-d $ulsdir) { 1776: unless (($ulsdir =~ m{^/home/httpd/html/(res/$LONCAPA::match_domain|userfiles/)}) || 1777: ($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/userfiles})) { 1778: &Failure($client,"refused\n","$userinput"); 1779: return 1; 1780: } 1781: if (opendir(LSDIR,$ulsdir)) { 1782: while ($ulsfn=readdir(LSDIR)) { 1783: undef($obs); 1784: undef($rights); 1785: my @ulsstats=stat($ulsdir.'/'.$ulsfn); 1786: #We do some obsolete checking here 1787: if(-e $ulsdir.'/'.$ulsfn.".meta") { 1788: open(FILE, $ulsdir.'/'.$ulsfn.".meta"); 1789: my @obsolete=<FILE>; 1790: foreach my $obsolete (@obsolete) { 1791: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; } 1792: if($obsolete =~ m|(<copyright>)(default)|) { 1793: $rights = 1; 1794: } 1795: } 1796: } 1797: my $tmp = $ulsfn.'&'.join('&',@ulsstats); 1798: if ($obs eq '1') { $tmp.="&1"; } else { $tmp.="&0"; } 1799: if ($rights eq '1') { $tmp.="&1"; } else { $tmp.="&0"; } 1800: $ulsout.= &escape($tmp).':'; 1801: } 1802: closedir(LSDIR); 1803: } 1804: } else { 1805: unless (($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/}) || 1806: ($ulsdir =~ m{^/home/httpd/html/(?:res|userfiles)/$LONCAPA::match_domain/$LONCAPA::match_name/})) { 1807: &Failure($client,"refused\n",$userinput); 1808: return 1; 1809: } 1810: my @ulsstats=stat($ulsdir); 1811: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':'; 1812: } 1813: } else { 1814: $ulsout='no_such_dir'; 1815: } 1816: if ($ulsout eq '') { $ulsout='empty'; } 1817: &Reply($client, \$ulsout, $userinput); # This supports debug logging. 1818: return 1; 1819: } 1820: &register_handler("ls2", \&ls2_handler, 0, 1, 0); 1821: # 1822: # ls3 - list the contents of a directory. For each file in the 1823: # selected directory the filename followed by the full output of 1824: # the stat function is returned. The returned info for each 1825: # file are separated by ':'. The stat fields are separated by &'s. 1826: # 1827: # If the requested path (after prepending) contains /../ or is: 1828: # 1829: # 1. for a directory, and the path does not begin with one of: 1830: # (a) /home/httpd/html/res/<domain> 1831: # (b) /home/httpd/html/userfiles/ 1832: # (c) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/userfiles 1833: # (d) /home/httpd/html/priv/<domain> and client is the homeserver 1834: # 1835: # or is: 1836: # 1837: # 2. for a file, and the path (after prepending) does not begin with one of: 1838: # (a) /home/httpd/lonUsers/<domain>/<1>/<2>/<3>/<username>/ 1839: # (b) /home/httpd/html/res/<domain>/<username>/ 1840: # (c) /home/httpd/html/userfiles/<domain>/<username>/ 1841: # (d) /home/httpd/html/priv/<domain>/<username>/ and client is the homeserver 1842: # 1843: # the response will be "refused". 1844: # 1845: # Parameters: 1846: # $cmd - The command that dispatched us (ls). 1847: # $tail - The tail of the request that invoked us. 1848: # $tail is a : separated list of the following: 1849: # - $ulsdir - directory path to list (before prepending) 1850: # - $getpropath = 1 if &propath() should prepend 1851: # - $getuserdir = 1 if path to user dir in lonUsers should 1852: # prepend 1853: # - $alternate_root - path to prepend 1854: # - $uname - username to use for &propath or user dir 1855: # - $udom - domain to use for &propath or user dir 1856: # All of these except $getpropath and &getuserdir are escaped. 1857: # no_such_dir. 1858: # $client - Socket open on the client. 1859: # Returns: 1860: # 1 - indicating that the daemon should not disconnect. 1861: # Side Effects: 1862: # The reply is written to $client. 1863: # 1864: 1865: sub ls3_handler { 1866: my ($cmd, $tail, $client) = @_; 1867: my $userinput = "$cmd:$tail"; 1868: my ($ulsdir,$getpropath,$getuserdir,$alternate_root,$uname,$udom) = 1869: split(/:/,$tail); 1870: if (defined($ulsdir)) { 1871: $ulsdir = &unescape($ulsdir); 1872: } 1873: if (defined($alternate_root)) { 1874: $alternate_root = &unescape($alternate_root); 1875: } 1876: if (defined($uname)) { 1877: $uname = &unescape($uname); 1878: } 1879: if (defined($udom)) { 1880: $udom = &unescape($udom); 1881: } 1882: 1883: my $dir_root = $perlvar{'lonDocRoot'}; 1884: if (($getpropath) || ($getuserdir)) { 1885: if (($uname =~ /^$LONCAPA::match_name$/) && ($udom =~ /^$LONCAPA::match_domain$/)) { 1886: $dir_root = &propath($udom,$uname); 1887: $dir_root =~ s/\/$//; 1888: } else { 1889: &Failure($client,"refused\n",$userinput); 1890: return 1; 1891: } 1892: } elsif ($alternate_root ne '') { 1893: $dir_root = $alternate_root; 1894: } 1895: if (($dir_root ne '') && ($dir_root ne '/')) { 1896: if ($ulsdir =~ /^\//) { 1897: $ulsdir = $dir_root.$ulsdir; 1898: } else { 1899: $ulsdir = $dir_root.'/'.$ulsdir; 1900: } 1901: } 1902: if ($ulsdir =~m{/\.\./}) { 1903: &Failure($client,"refused\n",$userinput); 1904: return 1; 1905: } 1906: my $islocal; 1907: my @machine_ids = &Apache::lonnet::current_machine_ids(); 1908: if (grep(/^\Q$clientname\E$/,@machine_ids)) { 1909: $islocal = 1; 1910: } 1911: my $obs; 1912: my $rights; 1913: my $ulsout=''; 1914: my $ulsfn; 1915: 1916: my ($crscheck,$toplevel,$currdom,$currnum,$skip); 1917: unless ($islocal) { 1918: my ($major,$minor) = split(/\./,$clientversion); 1919: if (($major < 2) || ($major == 2 && $minor < 12)) { 1920: $crscheck = 1; 1921: } 1922: } 1923: if (-e $ulsdir) { 1924: if(-d $ulsdir) { 1925: unless (($getpropath) || ($getuserdir) || 1926: ($ulsdir =~ m{^/home/httpd/html/(res/$LONCAPA::match_domain|userfiles/)}) || 1927: ($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/userfiles}) || 1928: (($ulsdir =~ m{^/home/httpd/html/priv/$LONCAPA::match_domain}) && ($islocal))) { 1929: &Failure($client,"refused\n",$userinput); 1930: return 1; 1931: } 1932: if (($crscheck) && 1933: ($ulsdir =~ m{^/home/httpd/html/res/($LONCAPA::match_domain)(/?$|/$LONCAPA::match_courseid)})) { 1934: ($currdom,my $posscnum) = ($1,$2); 1935: if (($posscnum eq '') || ($posscnum eq '/')) { 1936: $toplevel = 1; 1937: } else { 1938: $posscnum =~ s{^/+}{}; 1939: if (&LONCAPA::Lond::is_course($currdom,$posscnum)) { 1940: $skip = 1; 1941: } 1942: } 1943: } 1944: if ((!$skip) && (opendir(LSDIR,$ulsdir))) { 1945: while ($ulsfn=readdir(LSDIR)) { 1946: if (($crscheck) && ($toplevel) && ($currdom ne '') && 1947: ($ulsfn =~ /^$LONCAPA::match_courseid$/) && (-d "$ulsdir/$ulsfn")) { 1948: if (&LONCAPA::Lond::is_course($currdom,$ulsfn)) { 1949: next; 1950: } 1951: } 1952: undef($obs); 1953: undef($rights); 1954: my @ulsstats=stat($ulsdir.'/'.$ulsfn); 1955: #We do some obsolete checking here 1956: if(-e $ulsdir.'/'.$ulsfn.".meta") { 1957: open(FILE, $ulsdir.'/'.$ulsfn.".meta"); 1958: my @obsolete=<FILE>; 1959: foreach my $obsolete (@obsolete) { 1960: if($obsolete =~ m/(<obsolete>)(on|1)/) { $obs = 1; } 1961: if($obsolete =~ m|(<copyright>)(default)|) { 1962: $rights = 1; 1963: } 1964: } 1965: } 1966: my $tmp = $ulsfn.'&'.join('&',@ulsstats); 1967: if ($obs eq '1') { $tmp.="&1"; } else { $tmp.="&0"; } 1968: if ($rights eq '1') { $tmp.="&1"; } else { $tmp.="&0"; } 1969: $ulsout.= &escape($tmp).':'; 1970: } 1971: closedir(LSDIR); 1972: } 1973: } else { 1974: unless (($getpropath) || ($getuserdir) || 1975: ($ulsdir =~ m{^/home/httpd/lonUsers/$LONCAPA::match_domain(?:/[\w\-.@]){3}/$LONCAPA::match_name/}) || 1976: ($ulsdir =~ m{^/home/httpd/html/(?:res|userfiles)/$LONCAPA::match_domain/$LONCAPA::match_name/}) || 1977: (($ulsdir =~ m{^/home/httpd/html/priv/$LONCAPA::match_domain/$LONCAPA::match_name/}) && ($islocal))) { 1978: &Failure($client,"refused\n",$userinput); 1979: return 1; 1980: } 1981: my @ulsstats=stat($ulsdir); 1982: $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':'; 1983: } 1984: } else { 1985: $ulsout='no_such_dir'; 1986: } 1987: if ($ulsout eq '') { $ulsout='empty'; } 1988: &Reply($client, \$ulsout, $userinput); # This supports debug logging. 1989: return 1; 1990: } 1991: &register_handler("ls3", \&ls3_handler, 0, 1, 0); 1992: 1993: sub read_lonnet_global { 1994: my ($cmd,$tail,$client) = @_; 1995: my $userinput = "$cmd:$tail"; 1996: my $requested = &Apache::lonnet::thaw_unescape($tail); 1997: my $result; 1998: my %packagevars = ( 1999: spareid => \%Apache::lonnet::spareid, 2000: perlvar => \%Apache::lonnet::perlvar, 2001: ); 2002: my %limit_to = ( 2003: perlvar => { 2004: lonOtherAuthen => 1, 2005: lonBalancer => 1, 2006: lonVersion => 1, 2007: lonAdmEMail => 1, 2008: lonSupportEMail => 1, 2009: lonSysEMail => 1, 2010: lonHostID => 1, 2011: lonRole => 1, 2012: lonDefDomain => 1, 2013: lonLoadLim => 1, 2014: lonUserLoadLim => 1, 2015: } 2016: ); 2017: if (ref($requested) eq 'HASH') { 2018: foreach my $what (keys(%{$requested})) { 2019: my $response; 2020: my $items = {}; 2021: if (exists($packagevars{$what})) { 2022: if (ref($limit_to{$what}) eq 'HASH') { 2023: foreach my $varname (keys(%{$packagevars{$what}})) { 2024: if ($limit_to{$what}{$varname}) { 2025: $items->{$varname} = $packagevars{$what}{$varname}; 2026: } 2027: } 2028: } else { 2029: $items = $packagevars{$what}; 2030: } 2031: if ($what eq 'perlvar') { 2032: if (!exists($packagevars{$what}{'lonBalancer'})) { 2033: if ($dist =~ /^(centos|rhes|fedora|scientific)/) { 2034: my $othervarref=LONCAPA::Configuration::read_conf('httpd.conf'); 2035: if (ref($othervarref) eq 'HASH') { 2036: $items->{'lonBalancer'} = $othervarref->{'lonBalancer'}; 2037: } 2038: } 2039: } 2040: } 2041: $response = &Apache::lonnet::freeze_escape($items); 2042: } 2043: $result .= &escape($what).'='.$response.'&'; 2044: } 2045: } 2046: $result =~ s/\&$//; 2047: &Reply($client,\$result,$userinput); 2048: return 1; 2049: } 2050: &register_handler("readlonnetglobal", \&read_lonnet_global, 0, 1, 0); 2051: 2052: sub server_devalidatecache_handler { 2053: my ($cmd,$tail,$client) = @_; 2054: my $userinput = "$cmd:$tail"; 2055: my $items = &unescape($tail); 2056: my @cached = split(/\&/,$items); 2057: foreach my $key (@cached) { 2058: if ($key =~ /:/) { 2059: my ($name,$id) = map { &unescape($_); } split(/:/,$key); 2060: &Apache::lonnet::devalidate_cache_new($name,$id); 2061: } 2062: } 2063: my $result = 'ok'; 2064: &Reply($client,\$result,$userinput); 2065: return 1; 2066: } 2067: &register_handler("devalidatecache", \&server_devalidatecache_handler, 0, 1, 0); 2068: 2069: sub server_timezone_handler { 2070: my ($cmd,$tail,$client) = @_; 2071: my $userinput = "$cmd:$tail"; 2072: my $timezone; 2073: my $clockfile = '/etc/sysconfig/clock'; # Fedora/CentOS/SuSE 2074: my $tzfile = '/etc/timezone'; # Debian/Ubuntu 2075: if (-e $clockfile) { 2076: if (open(my $fh,"<$clockfile")) { 2077: while (<$fh>) { 2078: next if (/^[\#\s]/); 2079: if (/^(?:TIME)?ZONE\s*=\s*['"]?\s*([\w\/]+)/) { 2080: $timezone = $1; 2081: last; 2082: } 2083: } 2084: close($fh); 2085: } 2086: } elsif (-e $tzfile) { 2087: if (open(my $fh,"<$tzfile")) { 2088: $timezone = <$fh>; 2089: close($fh); 2090: chomp($timezone); 2091: if ($timezone =~ m{^Etc/(\w+)$}) { 2092: $timezone = $1; 2093: } 2094: } 2095: } 2096: &Reply($client,\$timezone,$userinput); # This supports debug logging. 2097: return 1; 2098: } 2099: &register_handler("servertimezone", \&server_timezone_handler, 0, 1, 0); 2100: 2101: sub server_loncaparev_handler { 2102: my ($cmd,$tail,$client) = @_; 2103: my $userinput = "$cmd:$tail"; 2104: &Reply($client,\$perlvar{'lonVersion'},$userinput); 2105: return 1; 2106: } 2107: &register_handler("serverloncaparev", \&server_loncaparev_handler, 0, 1, 0); 2108: 2109: sub server_homeID_handler { 2110: my ($cmd,$tail,$client) = @_; 2111: my $userinput = "$cmd:$tail"; 2112: &Reply($client,\$perlvar{'lonHostID'},$userinput); 2113: return 1; 2114: } 2115: &register_handler("serverhomeID", \&server_homeID_handler, 0, 1, 0); 2116: 2117: sub server_distarch_handler { 2118: my ($cmd,$tail,$client) = @_; 2119: my $userinput = "$cmd:$tail"; 2120: my $reply = &distro_and_arch(); 2121: &Reply($client,\$reply,$userinput); 2122: return 1; 2123: } 2124: &register_handler("serverdistarch", \&server_distarch_handler, 0, 1, 0); 2125: 2126: sub server_certs_handler { 2127: my ($cmd,$tail,$client) = @_; 2128: my $userinput = "$cmd:$tail"; 2129: my $hostname = &Apache::lonnet::hostname($perlvar{'lonHostID'}); 2130: my $result = &LONCAPA::Lond::server_certs(\%perlvar,$perlvar{'lonHostID'},$hostname); 2131: &Reply($client,\$result,$userinput); 2132: return; 2133: } 2134: &register_handler("servercerts", \&server_certs_handler, 0, 1, 0); 2135: 2136: # Process a reinit request. Reinit requests that either 2137: # lonc or lond be reinitialized so that an updated 2138: # host.tab or domain.tab can be processed. 2139: # 2140: # Parameters: 2141: # $cmd - the actual keyword that invoked us. 2142: # $tail - the tail of the request that invoked us. 2143: # $client - File descriptor connected to the client 2144: # Returns: 2145: # 1 - Ok to continue processing. 2146: # 0 - Program should exit 2147: # Implicit output: 2148: # a reply is sent to the client. 2149: # 2150: sub reinit_process_handler { 2151: my ($cmd, $tail, $client) = @_; 2152: 2153: my $userinput = "$cmd:$tail"; 2154: 2155: my $cert = &GetCertificate($userinput); 2156: if(&ValidManager($cert)) { 2157: chomp($userinput); 2158: my $reply = &ReinitProcess($userinput); 2159: &Reply( $client, \$reply, $userinput); 2160: } else { 2161: &Failure( $client, "refused\n", $userinput); 2162: } 2163: return 1; 2164: } 2165: &register_handler("reinit", \&reinit_process_handler, 1, 0, 1); 2166: 2167: # Process the editing script for a table edit operation. 2168: # the editing operation must be encrypted and requested by 2169: # a manager host. 2170: # 2171: # Parameters: 2172: # $cmd - the actual keyword that invoked us. 2173: # $tail - the tail of the request that invoked us. 2174: # $client - File descriptor connected to the client 2175: # Returns: 2176: # 1 - Ok to continue processing. 2177: # 0 - Program should exit 2178: # Implicit output: 2179: # a reply is sent to the client. 2180: # 2181: sub edit_table_handler { 2182: my ($command, $tail, $client) = @_; 2183: 2184: my $userinput = "$command:$tail"; 2185: 2186: my $cert = &GetCertificate($userinput); 2187: if(&ValidManager($cert)) { 2188: my($filetype, $script) = split(/:/, $tail); 2189: if (($filetype eq "hosts") || 2190: ($filetype eq "domain")) { 2191: if($script ne "") { 2192: &Reply($client, # BUGBUG - EditFile 2193: &EditFile($userinput), # could fail. 2194: $userinput); 2195: } else { 2196: &Failure($client,"refused\n",$userinput); 2197: } 2198: } else { 2199: &Failure($client,"refused\n",$userinput); 2200: } 2201: } else { 2202: &Failure($client,"refused\n",$userinput); 2203: } 2204: return 1; 2205: } 2206: &register_handler("edit", \&edit_table_handler, 1, 0, 1); 2207: 2208: # 2209: # Authenticate a user against the LonCAPA authentication 2210: # database. Note that there are several authentication 2211: # possibilities: 2212: # - unix - The user can be authenticated against the unix 2213: # password file. 2214: # - internal - The user can be authenticated against a purely 2215: # internal per user password file. 2216: # - kerberos - The user can be authenticated against either a kerb4 or kerb5 2217: # ticket granting authority. 2218: # - user - The person tailoring LonCAPA can supply a user authentication 2219: # mechanism that is per system. 2220: # 2221: # Parameters: 2222: # $cmd - The command that got us here. 2223: # $tail - Tail of the command (remaining parameters). 2224: # $client - File descriptor connected to client. 2225: # Returns 2226: # 0 - Requested to exit, caller should shut down. 2227: # 1 - Continue processing. 2228: # Implicit inputs: 2229: # The authentication systems describe above have their own forms of implicit 2230: # input into the authentication process that are described above. 2231: # 2232: sub authenticate_handler { 2233: my ($cmd, $tail, $client) = @_; 2234: 2235: 2236: # Regenerate the full input line 2237: 2238: my $userinput = $cmd.":".$tail; 2239: 2240: # udom - User's domain. 2241: # uname - Username. 2242: # upass - User's password. 2243: # checkdefauth - Pass to validate_user() to try authentication 2244: # with default auth type(s) if no user account. 2245: # clientcancheckhost - Passed by clients with functionality in lonauth.pm 2246: # to check if session can be hosted. 2247: 2248: my ($udom, $uname, $upass, $checkdefauth, $clientcancheckhost)=split(/:/,$tail); 2249: &Debug(" Authenticate domain = $udom, user = $uname, password = $upass, checkdefauth = $checkdefauth"); 2250: chomp($upass); 2251: $upass=&unescape($upass); 2252: 2253: my $pwdcorrect = &validate_user($udom,$uname,$upass,$checkdefauth); 2254: if($pwdcorrect) { 2255: my $canhost = 1; 2256: unless ($clientcancheckhost) { 2257: my $uprimary_id = &Apache::lonnet::domain($udom,'primary'); 2258: my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id); 2259: my @intdoms; 2260: my $internet_names = &Apache::lonnet::get_internet_names($clientname); 2261: if (ref($internet_names) eq 'ARRAY') { 2262: @intdoms = @{$internet_names}; 2263: } 2264: unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) { 2265: my ($remote,$hosted); 2266: my $remotesession = &get_usersession_config($udom,'remotesession'); 2267: if (ref($remotesession) eq 'HASH') { 2268: $remote = $remotesession->{'remote'}; 2269: } 2270: my $hostedsession = &get_usersession_config($clienthomedom,'hostedsession'); 2271: if (ref($hostedsession) eq 'HASH') { 2272: $hosted = $hostedsession->{'hosted'}; 2273: } 2274: $canhost = &Apache::lonnet::can_host_session($udom,$clientname, 2275: $clientversion, 2276: $remote,$hosted); 2277: } 2278: } 2279: if ($canhost) { 2280: &Reply( $client, "authorized\n", $userinput); 2281: } else { 2282: &Reply( $client, "not_allowed_to_host\n", $userinput); 2283: } 2284: # 2285: # Bad credentials: Failed to authorize 2286: # 2287: } else { 2288: &Failure( $client, "non_authorized\n", $userinput); 2289: } 2290: 2291: return 1; 2292: } 2293: &register_handler("auth", \&authenticate_handler, 1, 1, 0); 2294: 2295: # 2296: # Change a user's password. Note that this function is complicated by 2297: # the fact that a user may be authenticated in more than one way: 2298: # At present, we are not able to change the password for all types of 2299: # authentication methods. Only for: 2300: # unix - unix password or shadow passoword style authentication. 2301: # local - Locally written authentication mechanism. 2302: # For now, kerb4 and kerb5 password changes are not supported and result 2303: # in an error. 2304: # FUTURE WORK: 2305: # Support kerberos passwd changes? 2306: # Parameters: 2307: # $cmd - The command that got us here. 2308: # $tail - Tail of the command (remaining parameters). 2309: # $client - File descriptor connected to client. 2310: # Returns 2311: # 0 - Requested to exit, caller should shut down. 2312: # 1 - Continue processing. 2313: # Implicit inputs: 2314: # The authentication systems describe above have their own forms of implicit 2315: # input into the authentication process that are described above. 2316: sub change_password_handler { 2317: my ($cmd, $tail, $client) = @_; 2318: 2319: my $userinput = $cmd.":".$tail; # Reconstruct client's string. 2320: 2321: # 2322: # udom - user's domain. 2323: # uname - Username. 2324: # upass - Current password. 2325: # npass - New password. 2326: # context - Context in which this was called 2327: # (preferences or reset_by_email). 2328: # lonhost - HostID of server where request originated 2329: 2330: my ($udom,$uname,$upass,$npass,$context,$lonhost)=split(/:/,$tail); 2331: 2332: $upass=&unescape($upass); 2333: $npass=&unescape($npass); 2334: &Debug("Trying to change password for $uname"); 2335: 2336: # First require that the user can be authenticated with their 2337: # old password unless context was 'reset_by_email': 2338: 2339: my ($validated,$failure); 2340: if ($context eq 'reset_by_email') { 2341: if ($lonhost eq '') { 2342: $failure = 'invalid_client'; 2343: } else { 2344: $validated = 1; 2345: } 2346: } else { 2347: $validated = &validate_user($udom, $uname, $upass); 2348: } 2349: if($validated) { 2350: my $realpasswd = &get_auth_type($udom, $uname); # Defined since authd. 2351: my ($howpwd,$contentpwd)=split(/:/,$realpasswd); 2352: my $notunique; 2353: if ($howpwd eq 'internal') { 2354: &Debug("internal auth"); 2355: my $ncpass = &hash_passwd($udom,$npass); 2356: my (undef,$method,@rest) = split(/!/,$contentpwd); 2357: if ($method eq 'bcrypt') { 2358: my %passwdconf = &Apache::lonnet::get_passwdconf($udom); 2359: if (($passwdconf{'numsaved'}) && ($passwdconf{'numsaved'} =~ /^\d+$/)) { 2360: my @oldpasswds; 2361: my $userpath = &propath($udom,$uname); 2362: my $fullpath = $userpath.'/oldpasswds'; 2363: if (-d $userpath) { 2364: my @oldfiles; 2365: if (-e $fullpath) { 2366: if (opendir(my $dir,$fullpath)) { 2367: (@oldfiles) = grep(/^\d+$/,readdir($dir)); 2368: closedir($dir); 2369: } 2370: if (@oldfiles) { 2371: @oldfiles = sort { $b <=> $a } (@oldfiles); 2372: my $numremoved = 0; 2373: for (my $i=0; $i<@oldfiles; $i++) { 2374: if ($i>=$passwdconf{'numsaved'}) { 2375: if (-f "$fullpath/$oldfiles[$i]") { 2376: if (unlink("$fullpath/$oldfiles[$i]")) { 2377: $numremoved ++; 2378: } 2379: } 2380: } elsif (open(my $fh,'<',"$fullpath/$oldfiles[$i]")) { 2381: while (my $line = <$fh>) { 2382: push(@oldpasswds,$line); 2383: } 2384: close($fh); 2385: } 2386: } 2387: if ($numremoved) { 2388: &logthis("unlinked $numremoved old password files for $uname:$udom"); 2389: } 2390: } 2391: } 2392: push(@oldpasswds,$contentpwd); 2393: foreach my $item (@oldpasswds) { 2394: my (undef,$method,@rest) = split(/!/,$item); 2395: if ($method eq 'bcrypt') { 2396: my $result = &hash_passwd($udom,$npass,@rest); 2397: if ($result eq $item) { 2398: $notunique = 1; 2399: last; 2400: } 2401: } 2402: } 2403: unless ($notunique) { 2404: unless (-e $fullpath) { 2405: if (&mkpath("$fullpath/")) { 2406: chmod(0700,$fullpath); 2407: } 2408: } 2409: if (-d $fullpath) { 2410: my $now = time; 2411: if (open(my $fh,'>',"$fullpath/$now")) { 2412: print $fh $contentpwd; 2413: close($fh); 2414: chmod(0400,"$fullpath/$now"); 2415: } 2416: } 2417: } 2418: } 2419: } 2420: } 2421: if ($notunique) { 2422: my $msg="Result of password change for $uname:$udom - password matches one used before"; 2423: if ($lonhost) { 2424: $msg .= " - request originated from: $lonhost"; 2425: } 2426: &logthis($msg); 2427: &Reply($client, "prioruse\n", $userinput); 2428: } elsif (&rewrite_password_file($udom, $uname, "internal:$ncpass")) { 2429: my $msg="Result of password change for $uname: pwchange_success"; 2430: if ($lonhost) { 2431: $msg .= " - request originated from: $lonhost"; 2432: } 2433: &logthis($msg); 2434: &update_passwd_history($uname,$udom,$howpwd,$context); 2435: &Reply($client, "ok\n", $userinput); 2436: } else { 2437: &logthis("Unable to open $uname passwd " 2438: ."to change password"); 2439: &Failure( $client, "non_authorized\n",$userinput); 2440: } 2441: } elsif ($howpwd eq 'unix' && $context ne 'reset_by_email') { 2442: my $result = &change_unix_password($uname, $npass); 2443: if ($result eq 'ok') { 2444: &update_passwd_history($uname,$udom,$howpwd,$context); 2445: } 2446: &logthis("Result of password change for $uname: ". 2447: $result); 2448: &Reply($client, \$result, $userinput); 2449: } else { 2450: # this just means that the current password mode is not 2451: # one we know how to change (e.g the kerberos auth modes or 2452: # locally written auth handler). 2453: # 2454: &Failure( $client, "auth_mode_error\n", $userinput); 2455: } 2456: } else { 2457: if ($failure eq '') { 2458: $failure = 'non_authorized'; 2459: } 2460: &Failure( $client, "$failure\n", $userinput); 2461: } 2462: 2463: return 1; 2464: } 2465: &register_handler("passwd", \&change_password_handler, 1, 1, 0); 2466: 2467: sub hash_passwd { 2468: my ($domain,$plainpass,@rest) = @_; 2469: my ($salt,$cost); 2470: if (@rest) { 2471: $cost = $rest[0]; 2472: # salt is first 22 characters, base-64 encoded by bcrypt 2473: my $plainsalt = substr($rest[1],0,22); 2474: $salt = Crypt::Eksblowfish::Bcrypt::de_base64($plainsalt); 2475: } else { 2476: my %domdefaults = &Apache::lonnet::get_domain_defaults($domain); 2477: my $defaultcost = $domdefaults{'intauth_cost'}; 2478: if (($defaultcost eq '') || ($defaultcost =~ /D/)) { 2479: $cost = 10; 2480: } else { 2481: $cost = $defaultcost; 2482: } 2483: # Generate random 16-octet base64 salt 2484: $salt = ""; 2485: $salt .= pack("C", int rand(256)) for 1..16; 2486: } 2487: my $hash = &Crypt::Eksblowfish::Bcrypt::bcrypt_hash({ 2488: key_nul => 1, 2489: cost => $cost, 2490: salt => $salt, 2491: }, Digest::SHA::sha512(Encode::encode('UTF-8',$plainpass))); 2492: 2493: my $result = join("!", "", "bcrypt", sprintf("%02d",$cost), 2494: &Crypt::Eksblowfish::Bcrypt::en_base64($salt). 2495: &Crypt::Eksblowfish::Bcrypt::en_base64($hash)); 2496: return $result; 2497: } 2498: 2499: # 2500: # Create a new user. User in this case means a lon-capa user. 2501: # The user must either already exist in some authentication realm 2502: # like kerberos or the /etc/passwd. If not, a user completely local to 2503: # this loncapa system is created. 2504: # 2505: # Parameters: 2506: # $cmd - The command that got us here. 2507: # $tail - Tail of the command (remaining parameters). 2508: # $client - File descriptor connected to client. 2509: # Returns 2510: # 0 - Requested to exit, caller should shut down. 2511: # 1 - Continue processing. 2512: # Implicit inputs: 2513: # The authentication systems describe above have their own forms of implicit 2514: # input into the authentication process that are described above. 2515: sub add_user_handler { 2516: 2517: my ($cmd, $tail, $client) = @_; 2518: 2519: 2520: my ($udom,$uname,$umode,$npass)=split(/:/,$tail); 2521: my $userinput = $cmd.":".$tail; # Reconstruct the full request line. 2522: 2523: &Debug("cmd =".$cmd." $udom =".$udom." uname=".$uname); 2524: 2525: 2526: if($udom eq $currentdomainid) { # Reject new users for other domains... 2527: 2528: my $oldumask=umask(0077); 2529: chomp($npass); 2530: $npass=&unescape($npass); 2531: my $passfilename = &password_path($udom, $uname); 2532: &Debug("Password file created will be:".$passfilename); 2533: if (-e $passfilename) { 2534: &Failure( $client, "already_exists\n", $userinput); 2535: } else { 2536: my $fperror=''; 2537: if (!&mkpath($passfilename)) { 2538: $fperror="error: ".($!+0)." mkdir failed while attempting " 2539: ."makeuser"; 2540: } 2541: unless ($fperror) { 2542: my $result=&make_passwd_file($uname,$udom,$umode,$npass, 2543: $passfilename,'makeuser'); 2544: &Reply($client,\$result, $userinput); #BUGBUG - could be fail 2545: } else { 2546: &Failure($client, \$fperror, $userinput); 2547: } 2548: } 2549: umask($oldumask); 2550: } else { 2551: &Failure($client, "not_right_domain\n", 2552: $userinput); # Even if we are multihomed. 2553: 2554: } 2555: return 1; 2556: 2557: } 2558: &register_handler("makeuser", \&add_user_handler, 1, 1, 0); 2559: 2560: # 2561: # Change the authentication method of a user. Note that this may 2562: # also implicitly change the user's password if, for example, the user is 2563: # joining an existing authentication realm. Known authentication realms at 2564: # this time are: 2565: # internal - Purely internal password file (only loncapa knows this user) 2566: # local - Institutionally written authentication module. 2567: # unix - Unix user (/etc/passwd with or without /etc/shadow). 2568: # kerb4 - kerberos version 4 2569: # kerb5 - kerberos version 5 2570: # 2571: # Parameters: 2572: # $cmd - The command that got us here. 2573: # $tail - Tail of the command (remaining parameters). 2574: # $client - File descriptor connected to client. 2575: # Returns 2576: # 0 - Requested to exit, caller should shut down. 2577: # 1 - Continue processing. 2578: # Implicit inputs: 2579: # The authentication systems describe above have their own forms of implicit 2580: # input into the authentication process that are described above. 2581: # NOTE: 2582: # This is also used to change the authentication credential values (e.g. passwd). 2583: # 2584: # 2585: sub change_authentication_handler { 2586: 2587: my ($cmd, $tail, $client) = @_; 2588: 2589: my $userinput = "$cmd:$tail"; # Reconstruct user input. 2590: 2591: my ($udom,$uname,$umode,$npass)=split(/:/,$tail); 2592: &Debug("cmd = ".$cmd." domain= ".$udom."uname =".$uname." umode= ".$umode); 2593: if ($udom ne $currentdomainid) { 2594: &Failure( $client, "not_right_domain\n", $client); 2595: } else { 2596: 2597: chomp($npass); 2598: 2599: $npass=&unescape($npass); 2600: my $oldauth = &get_auth_type($udom, $uname); # Get old auth info. 2601: my $passfilename = &password_path($udom, $uname); 2602: if ($passfilename) { # Not allowed to create a new user!! 2603: # If just changing the unix passwd. need to arrange to run 2604: # passwd since otherwise make_passwd_file will fail as 2605: # creation of unix authenticated users is no longer supported 2606: # except from the command line, when running make_domain_coordinator.pl 2607: 2608: if(($oldauth =~/^unix/) && ($umode eq "unix")) { 2609: my $result = &change_unix_password($uname, $npass); 2610: &logthis("Result of password change for $uname: ".$result); 2611: if ($result eq "ok") { 2612: &update_passwd_history($uname,$udom,$umode,'changeuserauth'); 2613: &Reply($client, \$result); 2614: } else { 2615: &Failure($client, \$result); 2616: } 2617: } else { 2618: my $result=&make_passwd_file($uname,$udom,$umode,$npass, 2619: $passfilename,'changeuserauth'); 2620: # 2621: # If the current auth mode is internal, and the old auth mode was 2622: # unix, or krb*, and the user is an author for this domain, 2623: # re-run manage_permissions for that role in order to be able 2624: # to take ownership of the construction space back to www:www 2625: # 2626: 2627: 2628: &Reply($client, \$result, $userinput); 2629: } 2630: 2631: 2632: } else { 2633: &Failure($client, "non_authorized\n", $userinput); # Fail the user now. 2634: } 2635: } 2636: return 1; 2637: } 2638: &register_handler("changeuserauth", \&change_authentication_handler, 1,1, 0); 2639: 2640: sub update_passwd_history { 2641: my ($uname,$udom,$umode,$context) = @_; 2642: my $proname=&propath($udom,$uname); 2643: my $now = time; 2644: if (open(my $fh,">>$proname/passwd.log")) { 2645: print $fh "$now:$umode:$context\n"; 2646: close($fh); 2647: } 2648: return; 2649: } 2650: 2651: # 2652: # Determines if this is the home server for a user. The home server 2653: # for a user will have his/her lon-capa passwd file. Therefore all we need 2654: # to do is determine if this file exists. 2655: # 2656: # Parameters: 2657: # $cmd - The command that got us here. 2658: # $tail - Tail of the command (remaining parameters). 2659: # $client - File descriptor connected to client. 2660: # Returns 2661: # 0 - Requested to exit, caller should shut down. 2662: # 1 - Continue processing. 2663: # Implicit inputs: 2664: # The authentication systems describe above have their own forms of implicit 2665: # input into the authentication process that are described above. 2666: # 2667: sub is_home_handler { 2668: my ($cmd, $tail, $client) = @_; 2669: 2670: my $userinput = "$cmd:$tail"; 2671: 2672: my ($udom,$uname)=split(/:/,$tail); 2673: chomp($uname); 2674: my $passfile = &password_filename($udom, $uname); 2675: if($passfile) { 2676: &Reply( $client, "found\n", $userinput); 2677: } else { 2678: &Failure($client, "not_found\n", $userinput); 2679: } 2680: return 1; 2681: } 2682: &register_handler("home", \&is_home_handler, 0,1,0); 2683: 2684: # 2685: # Process an update request for a resource. 2686: # A resource has been modified that we hold a subscription to. 2687: # If the resource is not local, then we must update, or at least invalidate our 2688: # cached copy of the resource. 2689: # Parameters: 2690: # $cmd - The command that got us here. 2691: # $tail - Tail of the command (remaining parameters). 2692: # $client - File descriptor connected to client. 2693: # Returns 2694: # 0 - Requested to exit, caller should shut down. 2695: # 1 - Continue processing. 2696: # Implicit inputs: 2697: # The authentication systems describe above have their own forms of implicit 2698: # input into the authentication process that are described above. 2699: # 2700: sub update_resource_handler { 2701: 2702: my ($cmd, $tail, $client) = @_; 2703: 2704: my $userinput = "$cmd:$tail"; 2705: 2706: my $fname= $tail; # This allows interactive testing 2707: 2708: 2709: my $ownership=ishome($fname); 2710: if ($ownership eq 'not_owner') { 2711: if (-e $fname) { 2712: # Delete preview file, if exists 2713: unlink("$fname.tmp"); 2714: # Get usage stats 2715: my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size, 2716: $atime,$mtime,$ctime,$blksize,$blocks)=stat($fname); 2717: my $now=time; 2718: my $since=$now-$atime; 2719: # If the file has not been used within lonExpire seconds, 2720: # unsubscribe from it and delete local copy 2721: if ($since>$perlvar{'lonExpire'}) { 2722: my $reply=&Apache::lonnet::reply("unsub:$fname","$clientname"); 2723: &devalidate_meta_cache($fname); 2724: unlink("$fname"); 2725: unlink("$fname.meta"); 2726: } else { 2727: # Yes, this is in active use. Get a fresh copy. Since it might be in 2728: # very active use and huge (like a movie), copy it to "in.transfer" filename first. 2729: my $transname="$fname.in.transfer"; 2730: my $remoteurl=&Apache::lonnet::reply("sub:$fname","$clientname"); 2731: my $response; 2732: # FIXME: cannot replicate files that take more than two minutes to transfer -- needs checking now 1200s timeout used 2733: # for LWP request. 2734: my $request=new HTTP::Request('GET',"$remoteurl"); 2735: $response=&LONCAPA::LWPReq::makerequest($clientname,$request,$transname,\%perlvar,1200,0,1); 2736: if ($response->is_error()) { 2737: my $reply=&Apache::lonnet::reply("unsub:$fname","$clientname"); 2738: &devalidate_meta_cache($fname); 2739: if (-e $transname) { 2740: unlink($transname); 2741: } 2742: unlink($fname); 2743: my $message=$response->status_line; 2744: &logthis("LWP GET: $message for $fname ($remoteurl)"); 2745: } else { 2746: if ($remoteurl!~/\.meta$/) { 2747: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta'); 2748: my $mresponse = &LONCAPA::LWPReq::makerequest($clientname,$mrequest,$fname.'.meta',\%perlvar,120,0,1); 2749: if ($mresponse->is_error()) { 2750: unlink($fname.'.meta'); 2751: } 2752: } 2753: # we successfully transfered, copy file over to real name 2754: rename($transname,$fname); 2755: &devalidate_meta_cache($fname); 2756: } 2757: } 2758: &Reply( $client, "ok\n", $userinput); 2759: } else { 2760: &Failure($client, "not_found\n", $userinput); 2761: } 2762: } else { 2763: &Failure($client, "rejected\n", $userinput); 2764: } 2765: return 1; 2766: } 2767: &register_handler("update", \&update_resource_handler, 0 ,1, 0); 2768: 2769: sub devalidate_meta_cache { 2770: my ($url) = @_; 2771: use Cache::Memcached; 2772: my $memcache = new Cache::Memcached({'servers'=>['127.0.0.1:11211']}); 2773: $url = &Apache::lonnet::declutter($url); 2774: $url =~ s-\.meta$--; 2775: my $id = &escape('meta:'.$url); 2776: $memcache->delete($id); 2777: } 2778: 2779: # 2780: # Fetch a user file from a remote server to the user's home directory 2781: # userfiles subdir. 2782: # Parameters: 2783: # $cmd - The command that got us here. 2784: # $tail - Tail of the command (remaining parameters). 2785: # $client - File descriptor connected to client. 2786: # Returns 2787: # 0 - Requested to exit, caller should shut down. 2788: # 1 - Continue processing. 2789: # 2790: sub fetch_user_file_handler { 2791: 2792: my ($cmd, $tail, $client) = @_; 2793: 2794: my $userinput = "$cmd:$tail"; 2795: my $fname = $tail; 2796: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|); 2797: my $udir=&propath($udom,$uname).'/userfiles'; 2798: unless (-e $udir) { 2799: mkdir($udir,0770); 2800: } 2801: Debug("fetch user file for $fname"); 2802: if (-e $udir) { 2803: $ufile=~s/^[\.\~]+//; 2804: 2805: # IF necessary, create the path right down to the file. 2806: # Note that any regular files in the way of this path are 2807: # wiped out to deal with some earlier folly of mine. 2808: 2809: if (!&mkpath($udir.'/'.$ufile)) { 2810: &Failure($client, "unable_to_create\n", $userinput); 2811: } 2812: 2813: my $destname=$udir.'/'.$ufile; 2814: my $transname=$udir.'/'.$ufile.'.in.transit'; 2815: my $clientprotocol=$Apache::lonnet::protocol{$clientname}; 2816: $clientprotocol = 'http' if ($clientprotocol ne 'https'); 2817: my $clienthost = &Apache::lonnet::hostname($clientname); 2818: my $remoteurl=$clientprotocol.'://'.$clienthost.'/userfiles/'.$fname; 2819: my $response; 2820: Debug("Remote URL : $remoteurl Transfername $transname Destname: $destname"); 2821: my $request=new HTTP::Request('GET',"$remoteurl"); 2822: my $verifycert = 1; 2823: my @machine_ids = &Apache::lonnet::current_machine_ids(); 2824: if (grep(/^\Q$clientname\E$/,@machine_ids)) { 2825: $verifycert = 0; 2826: } 2827: $response = &LONCAPA::LWPReq::makerequest($clientname,$request,$transname,\%perlvar,1200,$verifycert); 2828: if ($response->is_error()) { 2829: unlink($transname); 2830: my $message=$response->status_line; 2831: &logthis("LWP GET: $message for $fname ($remoteurl)"); 2832: &Failure($client, "failed\n", $userinput); 2833: } else { 2834: Debug("Renaming $transname to $destname"); 2835: if (!rename($transname,$destname)) { 2836: &logthis("Unable to move $transname to $destname"); 2837: unlink($transname); 2838: &Failure($client, "failed\n", $userinput); 2839: } else { 2840: if ($fname =~ /^default.+\.(page|sequence)$/) { 2841: my ($major,$minor) = split(/\./,$clientversion); 2842: if (($major < 2) || ($major == 2 && $minor < 11)) { 2843: my $now = time; 2844: &Apache::lonnet::do_cache_new('crschange',$udom.'_'.$uname,$now,600); 2845: my $key = &escape('internal.contentchange'); 2846: my $what = "$key=$now"; 2847: my $hashref = &tie_user_hash($udom,$uname,'environment', 2848: &GDBM_WRCREAT(),"P",$what); 2849: if ($hashref) { 2850: $hashref->{$key}=$now; 2851: if (!&untie_user_hash($hashref)) { 2852: &logthis("error: ".($!+0)." untie (GDBM) failed ". 2853: "when updating internal.contentchange"); 2854: } 2855: } 2856: } 2857: } 2858: &Reply($client, "ok\n", $userinput); 2859: } 2860: } 2861: } else { 2862: &Failure($client, "not_home\n", $userinput); 2863: } 2864: return 1; 2865: } 2866: &register_handler("fetchuserfile", \&fetch_user_file_handler, 0, 1, 0); 2867: 2868: # 2869: # Remove a file from a user's home directory userfiles subdirectory. 2870: # Parameters: 2871: # cmd - the Lond request keyword that got us here. 2872: # tail - the part of the command past the keyword. 2873: # client- File descriptor connected with the client. 2874: # 2875: # Returns: 2876: # 1 - Continue processing. 2877: sub remove_user_file_handler { 2878: my ($cmd, $tail, $client) = @_; 2879: 2880: my ($fname) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent. 2881: 2882: my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|); 2883: if ($ufile =~m|/\.\./|) { 2884: # any files paths with /../ in them refuse 2885: # to deal with 2886: &Failure($client, "refused\n", "$cmd:$tail"); 2887: } else { 2888: my $udir = &propath($udom,$uname); 2889: if (-e $udir) { 2890: my $file=$udir.'/userfiles/'.$ufile; 2891: if (-e $file) { 2892: # 2893: # If the file is a regular file unlink is fine... 2894: # However it's possible the client wants a dir 2895: # removed, in which case rmdir is more appropriate. 2896: # Note: rmdir will only remove an empty directory. 2897: # 2898: if (-f $file){ 2899: unlink($file); 2900: # for html files remove the associated .bak file 2901: # which may have been created by the editor. 2902: if ($ufile =~ m{^((docs|supplemental)/(?:\d+|default)/\d+(?:|/.+)/)[^/]+\.x?html?$}i) { 2903: my $path = $1; 2904: if (-e $file.'.bak') { 2905: unlink($file.'.bak'); 2906: } 2907: } 2908: } elsif(-d $file) { 2909: rmdir($file); 2910: } 2911: if (-e $file) { 2912: # File is still there after we deleted it ?!? 2913: 2914: &Failure($client, "failed\n", "$cmd:$tail"); 2915: } else { 2916: &Reply($client, "ok\n", "$cmd:$tail"); 2917: } 2918: } else { 2919: &Failure($client, "not_found\n", "$cmd:$tail"); 2920: } 2921: } else { 2922: &Failure($client, "not_home\n", "$cmd:$tail"); 2923: } 2924: } 2925: return 1; 2926: } 2927: &register_handler("removeuserfile", \&remove_user_file_handler, 0,1,0); 2928: 2929: # 2930: # make a directory in a user's home directory userfiles subdirectory. 2931: # Parameters: 2932: # cmd - the Lond request keyword that got us here. 2933: # tail - the part of the command past the keyword. 2934: # client- File descriptor connected with the client. 2935: # 2936: # Returns: 2937: # 1 - Continue processing. 2938: sub mkdir_user_file_handler { 2939: my ($cmd, $tail, $client) = @_; 2940: 2941: my ($dir) = split(/:/, $tail); # Get rid of any tailing :'s lonc may have sent. 2942: $dir=&unescape($dir); 2943: my ($udom,$uname,$ufile) = ($dir =~ m|^([^/]+)/([^/]+)/(.+)$|); 2944: if ($ufile =~m|/\.\./|) { 2945: # any files paths with /../ in them refuse 2946: # to deal with 2947: &Failure($client, "refused\n", "$cmd:$tail"); 2948: } else { 2949: my $udir = &propath($udom,$uname); 2950: if (-e $udir) { 2951: my $newdir=$udir.'/userfiles/'.$ufile.'/'; 2952: if (!&mkpath($newdir)) { 2953: &Failure($client, "failed\n", "$cmd:$tail"); 2954: } 2955: &Reply($client, "ok\n", "$cmd:$tail"); 2956: } else { 2957: &Failure($client, "not_home\n", "$cmd:$tail"); 2958: } 2959: } 2960: return 1; 2961: } 2962: &register_handler("mkdiruserfile", \&mkdir_user_file_handler, 0,1,0); 2963: 2964: # 2965: # rename a file in a user's home directory userfiles subdirectory. 2966: # Parameters: 2967: # cmd - the Lond request keyword that got us here. 2968: # tail - the part of the command past the keyword. 2969: # client- File descriptor connected with the client. 2970: # 2971: # Returns: 2972: # 1 - Continue processing. 2973: sub rename_user_file_handler { 2974: my ($cmd, $tail, $client) = @_; 2975: 2976: my ($udom,$uname,$old,$new) = split(/:/, $tail); 2977: $old=&unescape($old); 2978: $new=&unescape($new); 2979: if ($new =~m|/\.\./| || $old =~m|/\.\./|) { 2980: # any files paths with /../ in them refuse to deal with 2981: &Failure($client, "refused\n", "$cmd:$tail"); 2982: } else { 2983: my $udir = &propath($udom,$uname); 2984: if (-e $udir) { 2985: my $oldfile=$udir.'/userfiles/'.$old; 2986: my $newfile=$udir.'/userfiles/'.$new; 2987: if (-e $newfile) { 2988: &Failure($client, "exists\n", "$cmd:$tail"); 2989: } elsif (! -e $oldfile) { 2990: &Failure($client, "not_found\n", "$cmd:$tail"); 2991: } else { 2992: if (!rename($oldfile,$newfile)) { 2993: &Failure($client, "failed\n", "$cmd:$tail"); 2994: } else { 2995: &Reply($client, "ok\n", "$cmd:$tail"); 2996: } 2997: } 2998: } else { 2999: &Failure($client, "not_home\n", "$cmd:$tail"); 3000: } 3001: } 3002: return 1; 3003: } 3004: &register_handler("renameuserfile", \&rename_user_file_handler, 0,1,0); 3005: 3006: # 3007: # Checks if the specified user has an active session on the server 3008: # return ok if so, not_found if not 3009: # 3010: # Parameters: 3011: # cmd - The request keyword that dispatched to tus. 3012: # tail - The tail of the request (colon separated parameters). 3013: # client - Filehandle open on the client. 3014: # Return: 3015: # 1. 3016: sub user_has_session_handler { 3017: my ($cmd, $tail, $client) = @_; 3018: 3019: my ($udom, $uname) = map { &unescape($_) } (split(/:/, $tail)); 3020: 3021: opendir(DIR,$perlvar{'lonIDsDir'}); 3022: my $filename; 3023: while ($filename=readdir(DIR)) { 3024: last if ($filename=~/^\Q$uname\E_\d+_\Q$udom\E_/); 3025: } 3026: if ($filename) { 3027: &Reply($client, "ok\n", "$cmd:$tail"); 3028: } else { 3029: &Failure($client, "not_found\n", "$cmd:$tail"); 3030: } 3031: return 1; 3032: 3033: } 3034: &register_handler("userhassession", \&user_has_session_handler, 0,1,0); 3035: 3036: # 3037: # Authenticate access to a user file by checking that the token the user's 3038: # passed also exists in their session file 3039: # 3040: # Parameters: 3041: # cmd - The request keyword that dispatched to tus. 3042: # tail - The tail of the request (colon separated parameters). 3043: # client - Filehandle open on the client. 3044: # Return: 3045: # 1. 3046: sub token_auth_user_file_handler { 3047: my ($cmd, $tail, $client) = @_; 3048: 3049: my ($fname, $session) = split(/:/, $tail); 3050: 3051: chomp($session); 3052: my $reply="non_auth"; 3053: my $file = $perlvar{'lonIDsDir'}.'/'.$session.'.id'; 3054: if (open(ENVIN,"$file")) { 3055: flock(ENVIN,LOCK_SH); 3056: tie(my %disk_env,'GDBM_File',"$file",&GDBM_READER(),0640); 3057: if (exists($disk_env{"userfile.$fname"})) { 3058: $reply="ok"; 3059: } else { 3060: foreach my $envname (keys(%disk_env)) { 3061: if ($envname=~ m|^userfile\.\Q$fname\E|) { 3062: $reply="ok"; 3063: last; 3064: } 3065: } 3066: } 3067: untie(%disk_env); 3068: close(ENVIN); 3069: &Reply($client, \$reply, "$cmd:$tail"); 3070: } else { 3071: &Failure($client, "invalid_token\n", "$cmd:$tail"); 3072: } 3073: return 1; 3074: 3075: } 3076: &register_handler("tokenauthuserfile", \&token_auth_user_file_handler, 0,1,0); 3077: 3078: # 3079: # Unsubscribe from a resource. 3080: # 3081: # Parameters: 3082: # $cmd - The command that got us here. 3083: # $tail - Tail of the command (remaining parameters). 3084: # $client - File descriptor connected to client. 3085: # Returns 3086: # 0 - Requested to exit, caller should shut down. 3087: # 1 - Continue processing. 3088: # 3089: sub unsubscribe_handler { 3090: my ($cmd, $tail, $client) = @_; 3091: 3092: my $userinput= "$cmd:$tail"; 3093: 3094: my ($fname) = split(/:/,$tail); # Split in case there's extrs. 3095: 3096: &Debug("Unsubscribing $fname"); 3097: if (-e $fname) { 3098: &Debug("Exists"); 3099: &Reply($client, &unsub($fname,$clientip), $userinput); 3100: } else { 3101: &Failure($client, "not_found\n", $userinput); 3102: } 3103: return 1; 3104: } 3105: &register_handler("unsub", \&unsubscribe_handler, 0, 1, 0); 3106: 3107: # Subscribe to a resource 3108: # 3109: # Parameters: 3110: # $cmd - The command that got us here. 3111: # $tail - Tail of the command (remaining parameters). 3112: # $client - File descriptor connected to client. 3113: # Returns 3114: # 0 - Requested to exit, caller should shut down. 3115: # 1 - Continue processing. 3116: # 3117: sub subscribe_handler { 3118: my ($cmd, $tail, $client)= @_; 3119: 3120: my $userinput = "$cmd:$tail"; 3121: 3122: &Reply( $client, &subscribe($userinput,$clientip), $userinput); 3123: 3124: return 1; 3125: } 3126: &register_handler("sub", \&subscribe_handler, 0, 1, 0); 3127: 3128: # 3129: # Determine the latest version of a resource (it looks for the highest 3130: # past version and then returns that +1) 3131: # 3132: # Parameters: 3133: # $cmd - The command that got us here. 3134: # $tail - Tail of the command (remaining parameters). 3135: # (Should consist of an absolute path to a file) 3136: # $client - File descriptor connected to client. 3137: # Returns 3138: # 0 - Requested to exit, caller should shut down. 3139: # 1 - Continue processing. 3140: # 3141: sub current_version_handler { 3142: my ($cmd, $tail, $client) = @_; 3143: 3144: my $userinput= "$cmd:$tail"; 3145: 3146: my $fname = $tail; 3147: &Reply( $client, &currentversion($fname)."\n", $userinput); 3148: return 1; 3149: 3150: } 3151: &register_handler("currentversion", \&current_version_handler, 0, 1, 0); 3152: 3153: # Make an entry in a user's activity log. 3154: # 3155: # Parameters: 3156: # $cmd - The command that got us here. 3157: # $tail - Tail of the command (remaining parameters). 3158: # $client - File descriptor connected to client. 3159: # Returns 3160: # 0 - Requested to exit, caller should shut down. 3161: # 1 - Continue processing. 3162: # 3163: sub activity_log_handler { 3164: my ($cmd, $tail, $client) = @_; 3165: 3166: 3167: my $userinput= "$cmd:$tail"; 3168: 3169: my ($udom,$uname,$what)=split(/:/,$tail); 3170: chomp($what); 3171: my $proname=&propath($udom,$uname); 3172: my $now=time; 3173: my $hfh; 3174: if ($hfh=IO::File->new(">>$proname/activity.log")) { 3175: print $hfh "$now:$clientname:$what\n"; 3176: &Reply( $client, "ok\n", $userinput); 3177: } else { 3178: &Failure($client, "error: ".($!+0)." IO::File->new Failed " 3179: ."while attempting log\n", 3180: $userinput); 3181: } 3182: 3183: return 1; 3184: } 3185: &register_handler("log", \&activity_log_handler, 0, 1, 0); 3186: 3187: # 3188: # Put a namespace entry in a user profile hash. 3189: # My druthers would be for this to be an encrypted interaction too. 3190: # anything that might be an inadvertent covert channel about either 3191: # user authentication or user personal information.... 3192: # 3193: # Parameters: 3194: # $cmd - The command that got us here. 3195: # $tail - Tail of the command (remaining parameters). 3196: # $client - File descriptor connected to client. 3197: # Returns 3198: # 0 - Requested to exit, caller should shut down. 3199: # 1 - Continue processing. 3200: # 3201: sub put_user_profile_entry { 3202: my ($cmd, $tail, $client) = @_; 3203: 3204: my $userinput = "$cmd:$tail"; 3205: 3206: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4); 3207: if ($namespace ne 'roles') { 3208: chomp($what); 3209: my $hashref = &tie_user_hash($udom, $uname, $namespace, 3210: &GDBM_WRCREAT(),"P",$what); 3211: if($hashref) { 3212: my @pairs=split(/\&/,$what); 3213: foreach my $pair (@pairs) { 3214: my ($key,$value)=split(/=/,$pair); 3215: $hashref->{$key}=$value; 3216: } 3217: if (&untie_user_hash($hashref)) { 3218: &Reply( $client, "ok\n", $userinput); 3219: } else { 3220: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ". 3221: "while attempting put\n", 3222: $userinput); 3223: } 3224: } else { 3225: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ". 3226: "while attempting put\n", $userinput); 3227: } 3228: } else { 3229: &Failure( $client, "refused\n", $userinput); 3230: } 3231: 3232: return 1; 3233: } 3234: &register_handler("put", \&put_user_profile_entry, 0, 1, 0); 3235: 3236: # Put a piece of new data in hash, returns error if entry already exists 3237: # Parameters: 3238: # $cmd - The command that got us here. 3239: # $tail - Tail of the command (remaining parameters). 3240: # $client - File descriptor connected to client. 3241: # Returns 3242: # 0 - Requested to exit, caller should shut down. 3243: # 1 - Continue processing. 3244: # 3245: sub newput_user_profile_entry { 3246: my ($cmd, $tail, $client) = @_; 3247: 3248: my $userinput = "$cmd:$tail"; 3249: 3250: my ($udom,$uname,$namespace,$what) =split(/:/,$tail,4); 3251: if ($namespace eq 'roles') { 3252: &Failure( $client, "refused\n", $userinput); 3253: return 1; 3254: } 3255: 3256: chomp($what); 3257: 3258: my $hashref = &tie_user_hash($udom, $uname, $namespace, 3259: &GDBM_WRCREAT(),"N",$what); 3260: if(!$hashref) { 3261: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ". 3262: "while attempting put\n", $userinput); 3263: return 1; 3264: } 3265: 3266: my @pairs=split(/\&/,$what); 3267: foreach my $pair (@pairs) { 3268: my ($key,$value)=split(/=/,$pair); 3269: if (exists($hashref->{$key})) { 3270: if (!&untie_user_hash($hashref)) { 3271: &logthis("error: ".($!+0)." untie (GDBM) failed ". 3272: "while attempting newput - early out as key exists"); 3273: } 3274: &Failure($client, "key_exists: ".$key."\n",$userinput); 3275: return 1; 3276: } 3277: } 3278: 3279: foreach my $pair (@pairs) { 3280: my ($key,$value)=split(/=/,$pair); 3281: $hashref->{$key}=$value; 3282: } 3283: 3284: if (&untie_user_hash($hashref)) { 3285: &Reply( $client, "ok\n", $userinput); 3286: } else { 3287: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ". 3288: "while attempting put\n", 3289: $userinput); 3290: } 3291: return 1; 3292: } 3293: &register_handler("newput", \&newput_user_profile_entry, 0, 1, 0); 3294: 3295: # 3296: # Increment a profile entry in the user history file. 3297: # The history contains keyword value pairs. In this case, 3298: # The value itself is a pair of numbers. The first, the current value 3299: # the second an increment that this function applies to the current 3300: # value. 3301: # 3302: # Parameters: 3303: # $cmd - The command that got us here. 3304: # $tail - Tail of the command (remaining parameters). 3305: # $client - File descriptor connected to client. 3306: # Returns 3307: # 0 - Requested to exit, caller should shut down. 3308: # 1 - Continue processing. 3309: # 3310: sub increment_user_value_handler { 3311: my ($cmd, $tail, $client) = @_; 3312: 3313: my $userinput = "$cmd:$tail"; 3314: 3315: my ($udom,$uname,$namespace,$what) =split(/:/,$tail); 3316: if ($namespace ne 'roles') { 3317: chomp($what); 3318: my $hashref = &tie_user_hash($udom, $uname, 3319: $namespace, &GDBM_WRCREAT(), 3320: "P",$what); 3321: if ($hashref) { 3322: my @pairs=split(/\&/,$what); 3323: foreach my $pair (@pairs) { 3324: my ($key,$value)=split(/=/,$pair); 3325: $value = &unescape($value); 3326: # We could check that we have a number... 3327: if (! defined($value) || $value eq '') { 3328: $value = 1; 3329: } 3330: $hashref->{$key}+=$value; 3331: if ($namespace eq 'nohist_resourcetracker') { 3332: if ($hashref->{$key} < 0) { 3333: $hashref->{$key} = 0; 3334: } 3335: } 3336: } 3337: if (&untie_user_hash($hashref)) { 3338: &Reply( $client, "ok\n", $userinput); 3339: } else { 3340: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ". 3341: "while attempting inc\n", $userinput); 3342: } 3343: } else { 3344: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ". 3345: "while attempting inc\n", $userinput); 3346: } 3347: } else { 3348: &Failure($client, "refused\n", $userinput); 3349: } 3350: 3351: return 1; 3352: } 3353: &register_handler("inc", \&increment_user_value_handler, 0, 1, 0); 3354: 3355: # 3356: # Put a new role for a user. Roles are LonCAPA's packaging of permissions. 3357: # Each 'role' a user has implies a set of permissions. Adding a new role 3358: # for a person grants the permissions packaged with that role 3359: # to that user when the role is selected. 3360: # 3361: # Parameters: 3362: # $cmd - The command string (rolesput). 3363: # $tail - The remainder of the request line. For rolesput this 3364: # consists of a colon separated list that contains: 3365: # The domain and user that is granting the role (logged). 3366: # The domain and user that is getting the role. 3367: # The roles being granted as a set of & separated pairs. 3368: # each pair a key value pair. 3369: # $client - File descriptor connected to the client. 3370: # Returns: 3371: # 0 - If the daemon should exit 3372: # 1 - To continue processing. 3373: # 3374: # 3375: sub roles_put_handler { 3376: my ($cmd, $tail, $client) = @_; 3377: 3378: my $userinput = "$cmd:$tail"; 3379: 3380: my ( $exedom, $exeuser, $udom, $uname, $what) = split(/:/,$tail); 3381: 3382: 3383: my $namespace='roles'; 3384: chomp($what); 3385: my $hashref = &tie_user_hash($udom, $uname, $namespace, 3386: &GDBM_WRCREAT(), "P", 3387: "$exedom:$exeuser:$what"); 3388: # 3389: # Log the attempt to set a role. The {}'s here ensure that the file 3390: # handle is open for the minimal amount of time. Since the flush 3391: # is done on close this improves the chances the log will be an un- 3392: # corrupted ordered thing. 3393: if ($hashref) { 3394: my $pass_entry = &get_auth_type($udom, $uname); 3395: my ($auth_type,$pwd) = split(/:/, $pass_entry); 3396: $auth_type = $auth_type.":"; 3397: my @pairs=split(/\&/,$what); 3398: foreach my $pair (@pairs) { 3399: my ($key,$value)=split(/=/,$pair); 3400: &manage_permissions($key, $udom, $uname, 3401: $auth_type); 3402: $hashref->{$key}=$value; 3403: } 3404: if (&untie_user_hash($hashref)) { 3405: &Reply($client, "ok\n", $userinput); 3406: } else { 3407: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ". 3408: "while attempting rolesput\n", $userinput); 3409: } 3410: } else { 3411: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ". 3412: "while attempting rolesput\n", $userinput); 3413: } 3414: return 1; 3415: } 3416: &register_handler("rolesput", \&roles_put_handler, 1,1,0); # Encoded client only. 3417: 3418: # 3419: # Deletes (removes) a role for a user. This is equivalent to removing 3420: # a permissions package associated with the role from the user's profile. 3421: # 3422: # Parameters: 3423: # $cmd - The command (rolesdel) 3424: # $tail - The remainder of the request line. This consists 3425: # of: 3426: # The domain and user requesting the change (logged) 3427: # The domain and user being changed. 3428: # The roles being revoked. These are shipped to us 3429: # as a bunch of & separated role name keywords. 3430: # $client - The file handle open on the client. 3431: # Returns: 3432: # 1 - Continue processing 3433: # 0 - Exit. 3434: # 3435: sub roles_delete_handler { 3436: my ($cmd, $tail, $client) = @_; 3437: 3438: my $userinput = "$cmd:$tail"; 3439: 3440: my ($exedom,$exeuser,$udom,$uname,$what)=split(/:/,$tail); 3441: &Debug("cmd = ".$cmd." exedom= ".$exedom."user = ".$exeuser." udom=".$udom. 3442: "what = ".$what); 3443: my $namespace='roles'; 3444: chomp($what); 3445: my $hashref = &tie_user_hash($udom, $uname, $namespace, 3446: &GDBM_WRCREAT(), "D", 3447: "$exedom:$exeuser:$what"); 3448: 3449: if ($hashref) { 3450: my @rolekeys=split(/\&/,$what); 3451: 3452: foreach my $key (@rolekeys) { 3453: delete $hashref->{$key}; 3454: } 3455: if (&untie_user_hash($hashref)) { 3456: &Reply($client, "ok\n", $userinput); 3457: } else { 3458: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ". 3459: "while attempting rolesdel\n", $userinput); 3460: } 3461: } else { 3462: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ". 3463: "while attempting rolesdel\n", $userinput); 3464: } 3465: 3466: return 1; 3467: } 3468: &register_handler("rolesdel", \&roles_delete_handler, 1,1, 0); # Encoded client only 3469: 3470: # Unencrypted get from a user's profile database. See 3471: # GetProfileEntryEncrypted for a version that does end-to-end encryption. 3472: # This function retrieves a keyed item from a specific named database in the 3473: # user's directory. 3474: # 3475: # Parameters: 3476: # $cmd - Command request keyword (get). 3477: # $tail - Tail of the command. This is a colon separated list 3478: # consisting of the domain and username that uniquely 3479: # identifies the profile, 3480: # The 'namespace' which selects the gdbm file to 3481: # do the lookup in, 3482: # & separated list of keys to lookup. Note that 3483: # the values are returned as an & separated list too. 3484: # $client - File descriptor open on the client. 3485: # Returns: 3486: # 1 - Continue processing. 3487: # 0 - Exit. 3488: # 3489: sub get_profile_entry { 3490: my ($cmd, $tail, $client) = @_; 3491: 3492: my $userinput= "$cmd:$tail"; 3493: 3494: my ($udom,$uname,$namespace,$what) = split(/:/,$tail); 3495: chomp($what); 3496: 3497: 3498: my $replystring = read_profile($udom, $uname, $namespace, $what); 3499: my ($first) = split(/:/,$replystring); 3500: if($first ne "error") { 3501: &Reply($client, \$replystring, $userinput); 3502: } else { 3503: &Failure($client, $replystring." while attempting get\n", $userinput); 3504: } 3505: return 1; 3506: 3507: 3508: } 3509: &register_handler("get", \&get_profile_entry, 0,1,0); 3510: 3511: # 3512: # Process the encrypted get request. Note that the request is sent 3513: # in clear, but the reply is encrypted. This is a small covert channel: 3514: # information about the sensitive keys is given to the snooper. Just not 3515: # information about the values of the sensitive key. Hmm if I wanted to 3516: # know these I'd snoop for the egets. Get the profile item names from them 3517: # and then issue a get for them since there's no enforcement of the 3518: # requirement of an encrypted get for particular profile items. If I 3519: # were re-doing this, I'd force the request to be encrypted as well as the 3520: # reply. I'd also just enforce encrypted transactions for all gets since 3521: # that would prevent any covert channel snooping. 3522: # 3523: # Parameters: 3524: # $cmd - Command keyword of request (eget). 3525: # $tail - Tail of the command. See GetProfileEntry 3526: # for more information about this. 3527: # $client - File open on the client. 3528: # Returns: 3529: # 1 - Continue processing 3530: # 0 - server should exit. 3531: sub get_profile_entry_encrypted { 3532: my ($cmd, $tail, $client) = @_; 3533: 3534: my $userinput = "$cmd:$tail"; 3535: 3536: my ($udom,$uname,$namespace,$what) = split(/:/,$tail); 3537: chomp($what); 3538: my $qresult = read_profile($udom, $uname, $namespace, $what); 3539: my ($first) = split(/:/, $qresult); 3540: if($first ne "error") { 3541: 3542: if ($cipher) { 3543: my $cmdlength=length($qresult); 3544: $qresult.=" "; 3545: my $encqresult=''; 3546: for(my $encidx=0;$encidx<=$cmdlength;$encidx+=8) { 3547: $encqresult.= unpack("H16", 3548: $cipher->encrypt(substr($qresult, 3549: $encidx, 3550: 8))); 3551: } 3552: &Reply( $client, "enc:$cmdlength:$encqresult\n", $userinput); 3553: } else { 3554: &Failure( $client, "error:no_key\n", $userinput); 3555: } 3556: } else { 3557: &Failure($client, "$qresult while attempting eget\n", $userinput); 3558: 3559: } 3560: 3561: return 1; 3562: } 3563: &register_handler("eget", \&get_profile_entry_encrypted, 0, 1, 0); 3564: 3565: # 3566: # Deletes a key in a user profile database. 3567: # 3568: # Parameters: 3569: # $cmd - Command keyword (del). 3570: # $tail - Command tail. IN this case a colon 3571: # separated list containing: 3572: # The domain and user that identifies uniquely 3573: # the identity of the user. 3574: # The profile namespace (name of the profile 3575: # database file). 3576: # & separated list of keywords to delete. 3577: # $client - File open on client socket. 3578: # Returns: 3579: # 1 - Continue processing 3580: # 0 - Exit server. 3581: # 3582: # 3583: sub delete_profile_entry { 3584: my ($cmd, $tail, $client) = @_; 3585: 3586: my $userinput = "cmd:$tail"; 3587: 3588: my ($udom,$uname,$namespace,$what) = split(/:/,$tail); 3589: chomp($what); 3590: my $hashref = &tie_user_hash($udom, $uname, $namespace, 3591: &GDBM_WRCREAT(), 3592: "D",$what); 3593: if ($hashref) { 3594: my @keys=split(/\&/,$what); 3595: foreach my $key (@keys) { 3596: delete($hashref->{$key}); 3597: } 3598: if (&untie_user_hash($hashref)) { 3599: &Reply($client, "ok\n", $userinput); 3600: } else { 3601: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". 3602: "while attempting del\n", $userinput); 3603: } 3604: } else { 3605: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ". 3606: "while attempting del\n", $userinput); 3607: } 3608: return 1; 3609: } 3610: &register_handler("del", \&delete_profile_entry, 0, 1, 0); 3611: 3612: # 3613: # List the set of keys that are defined in a profile database file. 3614: # A successful reply from this will contain an & separated list of 3615: # the keys. 3616: # Parameters: 3617: # $cmd - Command request (keys). 3618: # $tail - Remainder of the request, a colon separated 3619: # list containing domain/user that identifies the 3620: # user being queried, and the database namespace 3621: # (database filename essentially). 3622: # $client - File open on the client. 3623: # Returns: 3624: # 1 - Continue processing. 3625: # 0 - Exit the server. 3626: # 3627: sub get_profile_keys { 3628: my ($cmd, $tail, $client) = @_; 3629: 3630: my $userinput = "$cmd:$tail"; 3631: 3632: my ($udom,$uname,$namespace)=split(/:/,$tail); 3633: my $qresult=''; 3634: my $hashref = &tie_user_hash($udom, $uname, $namespace, 3635: &GDBM_READER()); 3636: if ($hashref) { 3637: foreach my $key (keys %$hashref) { 3638: $qresult.="$key&"; 3639: } 3640: if (&untie_user_hash($hashref)) { 3641: $qresult=~s/\&$//; 3642: &Reply($client, \$qresult, $userinput); 3643: } else { 3644: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". 3645: "while attempting keys\n", $userinput); 3646: } 3647: } else { 3648: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ". 3649: "while attempting keys\n", $userinput); 3650: } 3651: 3652: return 1; 3653: } 3654: &register_handler("keys", \&get_profile_keys, 0, 1, 0); 3655: 3656: # 3657: # Dump the contents of a user profile database. 3658: # Note that this constitutes a very large covert channel too since 3659: # the dump will return sensitive information that is not encrypted. 3660: # The naive security assumption is that the session negotiation ensures 3661: # our client is trusted and I don't believe that's assured at present. 3662: # Sure want badly to go to ssl or tls. Of course if my peer isn't really 3663: # a LonCAPA node they could have negotiated an encryption key too so >sigh<. 3664: # 3665: # Parameters: 3666: # $cmd - The command request keyword (currentdump). 3667: # $tail - Remainder of the request, consisting of a colon 3668: # separated list that has the domain/username and 3669: # the namespace to dump (database file). 3670: # $client - file open on the remote client. 3671: # Returns: 3672: # 1 - Continue processing. 3673: # 0 - Exit the server. 3674: # 3675: sub dump_profile_database { 3676: my ($cmd, $tail, $client) = @_; 3677: 3678: my $res = LONCAPA::Lond::dump_profile_database($tail); 3679: 3680: if ($res =~ /^error:/) { 3681: Failure($client, \$res, "$cmd:$tail"); 3682: } else { 3683: Reply($client, \$res, "$cmd:$tail"); 3684: } 3685: 3686: return 1; 3687: 3688: #TODO remove 3689: my $userinput = "$cmd:$tail"; 3690: 3691: my ($udom,$uname,$namespace) = split(/:/,$tail); 3692: my $hashref = &tie_user_hash($udom, $uname, $namespace, 3693: &GDBM_READER()); 3694: if ($hashref) { 3695: # Structure of %data: 3696: # $data{$symb}->{$parameter}=$value; 3697: # $data{$symb}->{'v.'.$parameter}=$version; 3698: # since $parameter will be unescaped, we do not 3699: # have to worry about silly parameter names... 3700: 3701: my $qresult=''; 3702: my %data = (); # A hash of anonymous hashes.. 3703: while (my ($key,$value) = each(%$hashref)) { 3704: my ($v,$symb,$param) = split(/:/,$key); 3705: next if ($v eq 'version' || $symb eq 'keys'); 3706: next if (exists($data{$symb}) && 3707: exists($data{$symb}->{$param}) && 3708: $data{$symb}->{'v.'.$param} > $v); 3709: $data{$symb}->{$param}=$value; 3710: $data{$symb}->{'v.'.$param}=$v; 3711: } 3712: if (&untie_user_hash($hashref)) { 3713: while (my ($symb,$param_hash) = each(%data)) { 3714: while(my ($param,$value) = each (%$param_hash)){ 3715: next if ($param =~ /^v\./); # Ignore versions... 3716: # 3717: # Just dump the symb=value pairs separated by & 3718: # 3719: $qresult.=$symb.':'.$param.'='.$value.'&'; 3720: } 3721: } 3722: chop($qresult); 3723: &Reply($client , \$qresult, $userinput); 3724: } else { 3725: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ". 3726: "while attempting currentdump\n", $userinput); 3727: } 3728: } else { 3729: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ". 3730: "while attempting currentdump\n", $userinput); 3731: } 3732: 3733: return 1; 3734: } 3735: &register_handler("currentdump", \&dump_profile_database, 0, 1, 0); 3736: 3737: # 3738: # Dump a profile database with an optional regular expression 3739: # to match against the keys. In this dump, no effort is made 3740: # to separate symb from version information. Presumably the 3741: # databases that are dumped by this command are of a different 3742: # structure. Need to look at this and improve the documentation of 3743: # both this and the currentdump handler. 3744: # Parameters: 3745: # $cmd - The command keyword. 3746: # $tail - All of the characters after the $cmd: 3747: # These are expected to be a colon 3748: # separated list containing: 3749: # domain/user - identifying the user. 3750: # namespace - identifying the database. 3751: # regexp - optional regular expression 3752: # that is matched against 3753: # database keywords to do 3754: # selective dumps. 3755: # range - optional range of entries 3756: # e.g., 10-20 would return the 3757: # 10th to 19th items, etc. 3758: # $client - Channel open on the client. 3759: # Returns: 3760: # 1 - Continue processing. 3761: # Side effects: 3762: # response is written to $client. 3763: # 3764: sub dump_with_regexp { 3765: my ($cmd, $tail, $client) = @_; 3766: 3767: my $res = LONCAPA::Lond::dump_with_regexp($tail, $clientversion); 3768: 3769: if ($res =~ /^error:/) { 3770: Failure($client, \$res, "$cmd:$tail"); 3771: } else { 3772: Reply($client, \$res, "$cmd:$tail"); 3773: } 3774: 3775: return 1; 3776: } 3777: &register_handler("dump", \&dump_with_regexp, 0, 1, 0); 3778: 3779: # Store a set of key=value pairs associated with a versioned name. 3780: # 3781: # Parameters: 3782: # $cmd - Request command keyword. 3783: # $tail - Tail of the request. This is a colon 3784: # separated list containing: 3785: # domain/user - User and authentication domain. 3786: # namespace - Name of the database being modified 3787: # rid - Resource keyword to modify. 3788: # what - new value associated with rid. 3789: # laststore - (optional) version=timestamp 3790: # for most recent transaction for rid 3791: # in namespace, when cstore was called 3792: # 3793: # $client - Socket open on the client. 3794: # 3795: # 3796: # Returns: 3797: # 1 (keep on processing). 3798: # Side-Effects: 3799: # Writes to the client 3800: # Successful storage will cause either 'ok', or, if $laststore was included 3801: # in the tail of the request, and the version number for the last transaction 3802: # is larger than the version in $laststore, delay:$numtrans , where $numtrans 3803: # is the number of store evevnts recorded for rid in namespace since 3804: # lonnet::store() was called by the client. 3805: # 3806: sub store_handler { 3807: my ($cmd, $tail, $client) = @_; 3808: 3809: my $userinput = "$cmd:$tail"; 3810: chomp($tail); 3811: my ($udom,$uname,$namespace,$rid,$what,$laststore) =split(/:/,$tail); 3812: if ($namespace ne 'roles') { 3813: 3814: my @pairs=split(/\&/,$what); 3815: my $hashref = &tie_user_hash($udom, $uname, $namespace, 3816: &GDBM_WRCREAT(), "S", 3817: "$rid:$what"); 3818: if ($hashref) { 3819: my $now = time; 3820: my $numtrans; 3821: if ($laststore) { 3822: my ($previousversion,$previoustime) = split(/\=/,$laststore); 3823: my ($lastversion,$lasttime) = (0,0); 3824: $lastversion = $hashref->{"version:$rid"}; 3825: if ($lastversion) { 3826: $lasttime = $hashref->{"$lastversion:$rid:timestamp"}; 3827: } 3828: if (($previousversion) && ($previousversion !~ /\D/)) { 3829: if (($lastversion > $previousversion) && ($lasttime >= $previoustime)) { 3830: $numtrans = $lastversion - $previousversion; 3831: } 3832: } elsif ($lastversion) { 3833: $numtrans = $lastversion; 3834: } 3835: if ($numtrans) { 3836: $numtrans =~ s/D//g; 3837: } 3838: } 3839: $hashref->{"version:$rid"}++; 3840: my $version=$hashref->{"version:$rid"}; 3841: my $allkeys=''; 3842: foreach my $pair (@pairs) { 3843: my ($key,$value)=split(/=/,$pair); 3844: $allkeys.=$key.':'; 3845: $hashref->{"$version:$rid:$key"}=$value; 3846: } 3847: $hashref->{"$version:$rid:timestamp"}=$now; 3848: $allkeys.='timestamp'; 3849: $hashref->{"$version:keys:$rid"}=$allkeys; 3850: if (&untie_user_hash($hashref)) { 3851: my $msg = 'ok'; 3852: if ($numtrans) { 3853: $msg = 'delay:'.$numtrans; 3854: } 3855: &Reply($client, "$msg\n", $userinput); 3856: } else { 3857: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". 3858: "while attempting store\n", $userinput); 3859: } 3860: } else { 3861: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ". 3862: "while attempting store\n", $userinput); 3863: } 3864: } else { 3865: &Failure($client, "refused\n", $userinput); 3866: } 3867: 3868: return 1; 3869: } 3870: &register_handler("store", \&store_handler, 0, 1, 0); 3871: 3872: # Modify a set of key=value pairs associated with a versioned name. 3873: # 3874: # Parameters: 3875: # $cmd - Request command keyword. 3876: # $tail - Tail of the request. This is a colon 3877: # separated list containing: 3878: # domain/user - User and authentication domain. 3879: # namespace - Name of the database being modified 3880: # rid - Resource keyword to modify. 3881: # v - Version item to modify 3882: # what - new value associated with rid. 3883: # 3884: # $client - Socket open on the client. 3885: # 3886: # 3887: # Returns: 3888: # 1 (keep on processing). 3889: # Side-Effects: 3890: # Writes to the client 3891: sub putstore_handler { 3892: my ($cmd, $tail, $client) = @_; 3893: 3894: my $userinput = "$cmd:$tail"; 3895: 3896: my ($udom,$uname,$namespace,$rid,$v,$what) =split(/:/,$tail); 3897: if ($namespace ne 'roles') { 3898: 3899: chomp($what); 3900: my $hashref = &tie_user_hash($udom, $uname, $namespace, 3901: &GDBM_WRCREAT(), "M", 3902: "$rid:$v:$what"); 3903: if ($hashref) { 3904: my $now = time; 3905: my %data = &hash_extract($what); 3906: my @allkeys; 3907: while (my($key,$value) = each(%data)) { 3908: push(@allkeys,$key); 3909: $hashref->{"$v:$rid:$key"} = $value; 3910: } 3911: my $allkeys = join(':',@allkeys); 3912: $hashref->{"$v:keys:$rid"}=$allkeys; 3913: 3914: if (&untie_user_hash($hashref)) { 3915: &Reply($client, "ok\n", $userinput); 3916: } else { 3917: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". 3918: "while attempting store\n", $userinput); 3919: } 3920: } else { 3921: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ". 3922: "while attempting store\n", $userinput); 3923: } 3924: } else { 3925: &Failure($client, "refused\n", $userinput); 3926: } 3927: 3928: return 1; 3929: } 3930: &register_handler("putstore", \&putstore_handler, 0, 1, 0); 3931: 3932: sub hash_extract { 3933: my ($str)=@_; 3934: my %hash; 3935: foreach my $pair (split(/\&/,$str)) { 3936: my ($key,$value)=split(/=/,$pair); 3937: $hash{$key}=$value; 3938: } 3939: return (%hash); 3940: } 3941: sub hash_to_str { 3942: my ($hash_ref)=@_; 3943: my $str; 3944: foreach my $key (keys(%$hash_ref)) { 3945: $str.=$key.'='.$hash_ref->{$key}.'&'; 3946: } 3947: $str=~s/\&$//; 3948: return $str; 3949: } 3950: 3951: # 3952: # Dump out all versions of a resource that has key=value pairs associated 3953: # with it for each version. These resources are built up via the store 3954: # command. 3955: # 3956: # Parameters: 3957: # $cmd - Command keyword. 3958: # $tail - Remainder of the request which consists of: 3959: # domain/user - User and auth. domain. 3960: # namespace - name of resource database. 3961: # rid - Resource id. 3962: # $client - socket open on the client. 3963: # 3964: # Returns: 3965: # 1 indicating the caller should not yet exit. 3966: # Side-effects: 3967: # Writes a reply to the client. 3968: # The reply is a string of the following shape: 3969: # version=current&version:keys=k1:k2...&1:k1=v1&1:k2=v2... 3970: # Where the 1 above represents version 1. 3971: # this continues for all pairs of keys in all versions. 3972: # 3973: # 3974: # 3975: # 3976: sub restore_handler { 3977: my ($cmd, $tail, $client) = @_; 3978: 3979: my $userinput = "$cmd:$tail"; # Only used for logging purposes. 3980: my ($udom,$uname,$namespace,$rid) = split(/:/,$tail); 3981: $namespace=~s/\//\_/g; 3982: $namespace = &LONCAPA::clean_username($namespace); 3983: 3984: chomp($rid); 3985: my $qresult=''; 3986: my $hashref = &tie_user_hash($udom, $uname, $namespace, &GDBM_READER()); 3987: if ($hashref) { 3988: my $version=$hashref->{"version:$rid"}; 3989: $qresult.="version=$version&"; 3990: my $scope; 3991: for ($scope=1;$scope<=$version;$scope++) { 3992: my $vkeys=$hashref->{"$scope:keys:$rid"}; 3993: my @keys=split(/:/,$vkeys); 3994: my $key; 3995: $qresult.="$scope:keys=$vkeys&"; 3996: foreach $key (@keys) { 3997: $qresult.="$scope:$key=".$hashref->{"$scope:$rid:$key"}."&"; 3998: } 3999: } 4000: if (&untie_user_hash($hashref)) { 4001: $qresult=~s/\&$//; 4002: &Reply( $client, \$qresult, $userinput); 4003: } else { 4004: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". 4005: "while attempting restore\n", $userinput); 4006: } 4007: } else { 4008: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ". 4009: "while attempting restore\n", $userinput); 4010: } 4011: 4012: return 1; 4013: 4014: 4015: } 4016: &register_handler("restore", \&restore_handler, 0,1,0); 4017: 4018: # 4019: # Add a chat message to a synchronous discussion board. 4020: # 4021: # Parameters: 4022: # $cmd - Request keyword. 4023: # $tail - Tail of the command. A colon separated list 4024: # containing: 4025: # cdom - Domain on which the chat board lives 4026: # cnum - Course containing the chat board. 4027: # newpost - Body of the posting. 4028: # group - Optional group, if chat board is only 4029: # accessible in a group within the course 4030: # $client - Socket open on the client. 4031: # Returns: 4032: # 1 - Indicating caller should keep on processing. 4033: # 4034: # Side-effects: 4035: # writes a reply to the client. 4036: # 4037: # 4038: sub send_chat_handler { 4039: my ($cmd, $tail, $client) = @_; 4040: 4041: 4042: my $userinput = "$cmd:$tail"; 4043: 4044: my ($cdom,$cnum,$newpost,$group)=split(/\:/,$tail); 4045: &chat_add($cdom,$cnum,$newpost,$group); 4046: &Reply($client, "ok\n", $userinput); 4047: 4048: return 1; 4049: } 4050: &register_handler("chatsend", \&send_chat_handler, 0, 1, 0); 4051: 4052: # 4053: # Retrieve the set of chat messages from a discussion board. 4054: # 4055: # Parameters: 4056: # $cmd - Command keyword that initiated the request. 4057: # $tail - Remainder of the request after the command 4058: # keyword. In this case a colon separated list of 4059: # chat domain - Which discussion board. 4060: # chat id - Discussion thread(?) 4061: # domain/user - Authentication domain and username 4062: # of the requesting person. 4063: # group - Optional course group containing 4064: # the board. 4065: # $client - Socket open on the client program. 4066: # Returns: 4067: # 1 - continue processing 4068: # Side effects: 4069: # Response is written to the client. 4070: # 4071: sub retrieve_chat_handler { 4072: my ($cmd, $tail, $client) = @_; 4073: 4074: 4075: my $userinput = "$cmd:$tail"; 4076: 4077: my ($cdom,$cnum,$udom,$uname,$group)=split(/\:/,$tail); 4078: my $reply=''; 4079: foreach (&get_chat($cdom,$cnum,$udom,$uname,$group)) { 4080: $reply.=&escape($_).':'; 4081: } 4082: $reply=~s/\:$//; 4083: &Reply($client, \$reply, $userinput); 4084: 4085: 4086: return 1; 4087: } 4088: &register_handler("chatretr", \&retrieve_chat_handler, 0, 1, 0); 4089: 4090: # 4091: # Initiate a query of an sql database. SQL query repsonses get put in 4092: # a file for later retrieval. This prevents sql query results from 4093: # bottlenecking the system. Note that with loncnew, perhaps this is 4094: # less of an issue since multiple outstanding requests can be concurrently 4095: # serviced. 4096: # 4097: # Parameters: 4098: # $cmd - Command keyword that initiated the request. 4099: # $tail - Remainder of the command after the keyword. 4100: # For this function, this consists of a query and 4101: # 3 arguments that are self-documentingly labelled 4102: # in the original arg1, arg2, arg3. 4103: # $client - Socket open on the client. 4104: # Return: 4105: # 1 - Indicating processing should continue. 4106: # Side-effects: 4107: # a reply is written to $client. 4108: # 4109: sub send_query_handler { 4110: my ($cmd, $tail, $client) = @_; 4111: 4112: my $userinput = "$cmd:$tail"; 4113: 4114: my ($query,$arg1,$arg2,$arg3)=split(/\:/,$tail); 4115: $query=~s/\n*$//g; 4116: if (($query eq 'usersearch') || ($query eq 'instdirsearch')) { 4117: my $usersearchconf = &get_usersearch_config($currentdomainid,'directorysrch'); 4118: my $earlyout; 4119: if (ref($usersearchconf) eq 'HASH') { 4120: if ($currentdomainid eq $clienthomedom) { 4121: if ($query eq 'usersearch') { 4122: if ($usersearchconf->{'lcavailable'} eq '0') { 4123: $earlyout = 1; 4124: } 4125: } else { 4126: if ($usersearchconf->{'available'} eq '0') { 4127: $earlyout = 1; 4128: } 4129: } 4130: } else { 4131: if ($query eq 'usersearch') { 4132: if ($usersearchconf->{'lclocalonly'}) { 4133: $earlyout = 1; 4134: } 4135: } else { 4136: if ($usersearchconf->{'localonly'}) { 4137: $earlyout = 1; 4138: } 4139: } 4140: } 4141: } 4142: if ($earlyout) { 4143: &Reply($client, "query_not_authorized\n"); 4144: return 1; 4145: } 4146: } 4147: &Reply($client, "". &sql_reply("$clientname\&$query". 4148: "\&$arg1"."\&$arg2"."\&$arg3")."\n", 4149: $userinput); 4150: 4151: return 1; 4152: } 4153: &register_handler("querysend", \&send_query_handler, 0, 1, 0); 4154: 4155: # 4156: # Add a reply to an sql query. SQL queries are done asyncrhonously. 4157: # The query is submitted via a "querysend" transaction. 4158: # There it is passed on to the lonsql daemon, queued and issued to 4159: # mysql. 4160: # This transaction is invoked when the sql transaction is complete 4161: # it stores the query results in flie and indicates query completion. 4162: # presumably local software then fetches this response... I'm guessing 4163: # the sequence is: lonc does a querysend, we ask lonsql to do it. 4164: # lonsql on completion of the query interacts with the lond of our 4165: # client to do a query reply storing two files: 4166: # - id - The results of the query. 4167: # - id.end - Indicating the transaction completed. 4168: # NOTE: id is a unique id assigned to the query and querysend time. 4169: # Parameters: 4170: # $cmd - Command keyword that initiated this request. 4171: # $tail - Remainder of the tail. In this case that's a colon 4172: # separated list containing the query Id and the 4173: # results of the query. 4174: # $client - Socket open on the client. 4175: # Return: 4176: # 1 - Indicating that we should continue processing. 4177: # Side effects: 4178: # ok written to the client. 4179: # 4180: sub reply_query_handler { 4181: my ($cmd, $tail, $client) = @_; 4182: 4183: 4184: my $userinput = "$cmd:$tail"; 4185: 4186: my ($id,$reply)=split(/:/,$tail); 4187: my $store; 4188: my $execdir=$perlvar{'lonDaemons'}; 4189: if ($store=IO::File->new(">$execdir/tmp/$id")) { 4190: $reply=~s/\&/\n/g; 4191: print $store $reply; 4192: close $store; 4193: my $store2=IO::File->new(">$execdir/tmp/$id.end"); 4194: print $store2 "done\n"; 4195: close $store2; 4196: &Reply($client, "ok\n", $userinput); 4197: } else { 4198: &Failure($client, "error: ".($!+0) 4199: ." IO::File->new Failed ". 4200: "while attempting queryreply\n", $userinput); 4201: } 4202: 4203: 4204: return 1; 4205: } 4206: &register_handler("queryreply", \&reply_query_handler, 0, 1, 0); 4207: 4208: # 4209: # Process the courseidput request. Not quite sure what this means 4210: # at the system level sense. It appears a gdbm file in the 4211: # /home/httpd/lonUsers/$domain/nohist_courseids is tied and 4212: # a set of entries made in that database. 4213: # 4214: # Parameters: 4215: # $cmd - The command keyword that initiated this request. 4216: # $tail - Tail of the command. In this case consists of a colon 4217: # separated list contaning the domain to apply this to and 4218: # an ampersand separated list of keyword=value pairs. 4219: # Each value is a colon separated list that includes: 4220: # description, institutional code and course owner. 4221: # For backward compatibility with versions included 4222: # in LON-CAPA 1.1.X (and earlier) and 1.2.X, institutional 4223: # code and/or course owner are preserved from the existing 4224: # record when writing a new record in response to 1.1 or 4225: # 1.2 implementations of lonnet::flushcourselogs(). 4226: # 4227: # $client - Socket open on the client. 4228: # Returns: 4229: # 1 - indicating that processing should continue 4230: # 4231: # Side effects: 4232: # reply is written to the client. 4233: # 4234: sub put_course_id_handler { 4235: my ($cmd, $tail, $client) = @_; 4236: 4237: 4238: my $userinput = "$cmd:$tail"; 4239: 4240: my ($udom, $what) = split(/:/, $tail,2); 4241: chomp($what); 4242: my $now=time; 4243: my @pairs=split(/\&/,$what); 4244: 4245: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT()); 4246: if ($hashref) { 4247: foreach my $pair (@pairs) { 4248: my ($key,$courseinfo) = split(/=/,$pair,2); 4249: $courseinfo =~ s/=/:/g; 4250: if (defined($hashref->{$key})) { 4251: my $value = &Apache::lonnet::thaw_unescape($hashref->{$key}); 4252: if (ref($value) eq 'HASH') { 4253: my @items = ('description','inst_code','owner','type'); 4254: my @new_items = split(/:/,$courseinfo,-1); 4255: my %storehash; 4256: for (my $i=0; $i<@new_items; $i++) { 4257: $storehash{$items[$i]} = &unescape($new_items[$i]); 4258: } 4259: $hashref->{$key} = 4260: &Apache::lonnet::freeze_escape(\%storehash); 4261: my $unesc_key = &unescape($key); 4262: $hashref->{&escape('lasttime:'.$unesc_key)} = $now; 4263: next; 4264: } 4265: } 4266: my @current_items = split(/:/,$hashref->{$key},-1); 4267: shift(@current_items); # remove description 4268: pop(@current_items); # remove last access 4269: my $numcurrent = scalar(@current_items); 4270: if ($numcurrent > 3) { 4271: $numcurrent = 3; 4272: } 4273: my @new_items = split(/:/,$courseinfo,-1); 4274: my $numnew = scalar(@new_items); 4275: if ($numcurrent > 0) { 4276: if ($numnew <= $numcurrent) { # flushcourselogs() from pre 2.2 4277: for (my $j=$numcurrent-$numnew; $j>=0; $j--) { 4278: $courseinfo .= ':'.$current_items[$numcurrent-$j-1]; 4279: } 4280: } 4281: } 4282: $hashref->{$key}=$courseinfo.':'.$now; 4283: } 4284: if (&untie_domain_hash($hashref)) { 4285: &Reply( $client, "ok\n", $userinput); 4286: } else { 4287: &Failure($client, "error: ".($!+0) 4288: ." untie(GDBM) Failed ". 4289: "while attempting courseidput\n", $userinput); 4290: } 4291: } else { 4292: &Failure($client, "error: ".($!+0) 4293: ." tie(GDBM) Failed ". 4294: "while attempting courseidput\n", $userinput); 4295: } 4296: 4297: return 1; 4298: } 4299: &register_handler("courseidput", \&put_course_id_handler, 0, 1, 0); 4300: 4301: sub put_course_id_hash_handler { 4302: my ($cmd, $tail, $client) = @_; 4303: my $userinput = "$cmd:$tail"; 4304: my ($udom,$mode,$what) = split(/:/, $tail,3); 4305: chomp($what); 4306: my $now=time; 4307: my @pairs=split(/\&/,$what); 4308: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT()); 4309: if ($hashref) { 4310: foreach my $pair (@pairs) { 4311: my ($key,$value)=split(/=/,$pair); 4312: my $unesc_key = &unescape($key); 4313: if ($mode ne 'timeonly') { 4314: if (!defined($hashref->{&escape('lasttime:'.$unesc_key)})) { 4315: my $curritems = &Apache::lonnet::thaw_unescape($key); 4316: if (ref($curritems) ne 'HASH') { 4317: my @current_items = split(/:/,$hashref->{$key},-1); 4318: my $lasttime = pop(@current_items); 4319: $hashref->{&escape('lasttime:'.$unesc_key)} = $lasttime; 4320: } else { 4321: $hashref->{&escape('lasttime:'.$unesc_key)} = ''; 4322: } 4323: } 4324: $hashref->{$key} = $value; 4325: } 4326: if ($mode ne 'notime') { 4327: $hashref->{&escape('lasttime:'.$unesc_key)} = $now; 4328: } 4329: } 4330: if (&untie_domain_hash($hashref)) { 4331: &Reply($client, "ok\n", $userinput); 4332: } else { 4333: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". 4334: "while attempting courseidputhash\n", $userinput); 4335: } 4336: } else { 4337: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ". 4338: "while attempting courseidputhash\n", $userinput); 4339: } 4340: return 1; 4341: } 4342: &register_handler("courseidputhash", \&put_course_id_hash_handler, 0, 1, 0); 4343: 4344: # Retrieves the value of a course id resource keyword pattern 4345: # defined since a starting date. Both the starting date and the 4346: # keyword pattern are optional. If the starting date is not supplied it 4347: # is treated as the beginning of time. If the pattern is not found, 4348: # it is treatred as "." matching everything. 4349: # 4350: # Parameters: 4351: # $cmd - Command keyword that resulted in us being dispatched. 4352: # $tail - The remainder of the command that, in this case, consists 4353: # of a colon separated list of: 4354: # domain - The domain in which the course database is 4355: # defined. 4356: # since - Optional parameter describing the minimum 4357: # time of definition(?) of the resources that 4358: # will match the dump. 4359: # description - regular expression that is used to filter 4360: # the dump. Only keywords matching this regexp 4361: # will be used. 4362: # institutional code - optional supplied code to filter 4363: # the dump. Only courses with an institutional code 4364: # that match the supplied code will be returned. 4365: # owner - optional supplied username and domain of owner to 4366: # filter the dump. Only courses for which the course 4367: # owner matches the supplied username and/or domain 4368: # will be returned. Pre-2.2.0 legacy entries from 4369: # nohist_courseiddump will only contain usernames. 4370: # type - optional parameter for selection 4371: # regexp_ok - if 1 or -1 allow the supplied institutional code 4372: # filter to behave as a regular expression: 4373: # 1 will not exclude the course if the instcode matches the RE 4374: # -1 will exclude the course if the instcode matches the RE 4375: # rtn_as_hash - whether to return the information available for 4376: # each matched item as a frozen hash of all 4377: # key, value pairs in the item's hash, or as a 4378: # colon-separated list of (in order) description, 4379: # institutional code, and course owner. 4380: # selfenrollonly - filter by courses allowing self-enrollment 4381: # now or in the future (selfenrollonly = 1). 4382: # catfilter - filter by course category, assigned to a course 4383: # using manually defined categories (i.e., not 4384: # self-cataloging based on on institutional code). 4385: # showhidden - include course in results even if course 4386: # was set to be excluded from course catalog (DC only). 4387: # caller - if set to 'coursecatalog', courses set to be hidden 4388: # from course catalog will be excluded from results (unless 4389: # overridden by "showhidden". 4390: # cloner - escaped username:domain of course cloner (if picking course to 4391: # clone). 4392: # cc_clone_list - escaped comma separated list of courses for which 4393: # course cloner has active CC role (and so can clone 4394: # automatically). 4395: # cloneonly - filter by courses for which cloner has rights to clone. 4396: # createdbefore - include courses for which creation date preceeded this date. 4397: # createdafter - include courses for which creation date followed this date. 4398: # creationcontext - include courses created in specified context 4399: # 4400: # domcloner - flag to indicate if user can create CCs in course's domain. 4401: # If so, ability to clone course is automatic. 4402: # hasuniquecode - filter by courses for which a six character unique code has 4403: # been set. 4404: # 4405: # $client - The socket open on the client. 4406: # Returns: 4407: # 1 - Continue processing. 4408: # Side Effects: 4409: # a reply is written to $client. 4410: sub dump_course_id_handler { 4411: my ($cmd, $tail, $client) = @_; 4412: 4413: my $res = LONCAPA::Lond::dump_course_id_handler($tail); 4414: if ($res =~ /^error:/) { 4415: Failure($client, \$res, "$cmd:$tail"); 4416: } else { 4417: Reply($client, \$res, "$cmd:$tail"); 4418: } 4419: 4420: return 1; 4421: 4422: #TODO remove 4423: my $userinput = "$cmd:$tail"; 4424: 4425: my ($udom,$since,$description,$instcodefilter,$ownerfilter,$coursefilter, 4426: $typefilter,$regexp_ok,$rtn_as_hash,$selfenrollonly,$catfilter,$showhidden, 4427: $caller,$cloner,$cc_clone_list,$cloneonly,$createdbefore,$createdafter, 4428: $creationcontext,$domcloner,$hasuniquecode) =split(/:/,$tail); 4429: my $now = time; 4430: my ($cloneruname,$clonerudom,%cc_clone); 4431: if (defined($description)) { 4432: $description=&unescape($description); 4433: } else { 4434: $description='.'; 4435: } 4436: if (defined($instcodefilter)) { 4437: $instcodefilter=&unescape($instcodefilter); 4438: } else { 4439: $instcodefilter='.'; 4440: } 4441: my ($ownerunamefilter,$ownerdomfilter); 4442: if (defined($ownerfilter)) { 4443: $ownerfilter=&unescape($ownerfilter); 4444: if ($ownerfilter ne '.' && defined($ownerfilter)) { 4445: if ($ownerfilter =~ /^([^:]*):([^:]*)$/) { 4446: $ownerunamefilter = $1; 4447: $ownerdomfilter = $2; 4448: } else { 4449: $ownerunamefilter = $ownerfilter; 4450: $ownerdomfilter = ''; 4451: } 4452: } 4453: } else { 4454: $ownerfilter='.'; 4455: } 4456: 4457: if (defined($coursefilter)) { 4458: $coursefilter=&unescape($coursefilter); 4459: } else { 4460: $coursefilter='.'; 4461: } 4462: if (defined($typefilter)) { 4463: $typefilter=&unescape($typefilter); 4464: } else { 4465: $typefilter='.'; 4466: } 4467: if (defined($regexp_ok)) { 4468: $regexp_ok=&unescape($regexp_ok); 4469: } 4470: if (defined($catfilter)) { 4471: $catfilter=&unescape($catfilter); 4472: } 4473: if (defined($cloner)) { 4474: $cloner = &unescape($cloner); 4475: ($cloneruname,$clonerudom) = ($cloner =~ /^($LONCAPA::match_username):($LONCAPA::match_domain)$/); 4476: } 4477: if (defined($cc_clone_list)) { 4478: $cc_clone_list = &unescape($cc_clone_list); 4479: my @cc_cloners = split('&',$cc_clone_list); 4480: foreach my $cid (@cc_cloners) { 4481: my ($clonedom,$clonenum) = split(':',$cid); 4482: next if ($clonedom ne $udom); 4483: $cc_clone{$clonedom.'_'.$clonenum} = 1; 4484: } 4485: } 4486: if ($createdbefore ne '') { 4487: $createdbefore = &unescape($createdbefore); 4488: } else { 4489: $createdbefore = 0; 4490: } 4491: if ($createdafter ne '') { 4492: $createdafter = &unescape($createdafter); 4493: } else { 4494: $createdafter = 0; 4495: } 4496: if ($creationcontext ne '') { 4497: $creationcontext = &unescape($creationcontext); 4498: } else { 4499: $creationcontext = '.'; 4500: } 4501: unless ($hasuniquecode) { 4502: $hasuniquecode = '.'; 4503: } 4504: my $unpack = 1; 4505: if ($description eq '.' && $instcodefilter eq '.' && $ownerfilter eq '.' && 4506: $typefilter eq '.') { 4507: $unpack = 0; 4508: } 4509: if (!defined($since)) { $since=0; } 4510: my $qresult=''; 4511: my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT()); 4512: if ($hashref) { 4513: while (my ($key,$value) = each(%$hashref)) { 4514: my ($unesc_key,$lasttime_key,$lasttime,$is_hash,%val, 4515: %unesc_val,$selfenroll_end,$selfenroll_types,$created, 4516: $context); 4517: $unesc_key = &unescape($key); 4518: if ($unesc_key =~ /^lasttime:/) { 4519: next; 4520: } else { 4521: $lasttime_key = &escape('lasttime:'.$unesc_key); 4522: } 4523: if ($hashref->{$lasttime_key} ne '') { 4524: $lasttime = $hashref->{$lasttime_key}; 4525: next if ($lasttime<$since); 4526: } 4527: my ($canclone,$valchange); 4528: my $items = &Apache::lonnet::thaw_unescape($value); 4529: if (ref($items) eq 'HASH') { 4530: if ($hashref->{$lasttime_key} eq '') { 4531: next if ($since > 1); 4532: } 4533: $is_hash = 1; 4534: if ($domcloner) { 4535: $canclone = 1; 4536: } elsif (defined($clonerudom)) { 4537: if ($items->{'cloners'}) { 4538: my @cloneable = split(',',$items->{'cloners'}); 4539: if (@cloneable) { 4540: if (grep(/^\*$/,@cloneable)) { 4541: $canclone = 1; 4542: } elsif (grep(/^\*:\Q$clonerudom\E$/,@cloneable)) { 4543: $canclone = 1; 4544: } elsif (grep(/^\Q$cloneruname\E:\Q$clonerudom\E$/,@cloneable)) { 4545: $canclone = 1; 4546: } 4547: } 4548: unless ($canclone) { 4549: if ($cloneruname ne '' && $clonerudom ne '') { 4550: if ($cc_clone{$unesc_key}) { 4551: $canclone = 1; 4552: $items->{'cloners'} .= ','.$cloneruname.':'. 4553: $clonerudom; 4554: $valchange = 1; 4555: } 4556: } 4557: } 4558: } elsif (defined($cloneruname)) { 4559: if ($cc_clone{$unesc_key}) { 4560: $canclone = 1; 4561: $items->{'cloners'} = $cloneruname.':'.$clonerudom; 4562: $valchange = 1; 4563: } 4564: unless ($canclone) { 4565: if ($items->{'owner'} =~ /:/) { 4566: if ($items->{'owner'} eq $cloner) { 4567: $canclone = 1; 4568: } 4569: } elsif ($cloner eq $items->{'owner'}.':'.$udom) { 4570: $canclone = 1; 4571: } 4572: if ($canclone) { 4573: $items->{'cloners'} = $cloneruname.':'.$clonerudom; 4574: $valchange = 1; 4575: } 4576: } 4577: } 4578: } 4579: if ($unpack || !$rtn_as_hash) { 4580: $unesc_val{'descr'} = $items->{'description'}; 4581: $unesc_val{'inst_code'} = $items->{'inst_code'}; 4582: $unesc_val{'owner'} = $items->{'owner'}; 4583: $unesc_val{'type'} = $items->{'type'}; 4584: $unesc_val{'cloners'} = $items->{'cloners'}; 4585: $unesc_val{'created'} = $items->{'created'}; 4586: $unesc_val{'context'} = $items->{'context'}; 4587: } 4588: $selfenroll_types = $items->{'selfenroll_types'}; 4589: $selfenroll_end = $items->{'selfenroll_end_date'}; 4590: $created = $items->{'created'}; 4591: $context = $items->{'context'}; 4592: if ($hasuniquecode ne '.') { 4593: next unless ($items->{'uniquecode'}); 4594: } 4595: if ($selfenrollonly) { 4596: next if (!$selfenroll_types); 4597: if (($selfenroll_end > 0) && ($selfenroll_end <= $now)) { 4598: next; 4599: } 4600: } 4601: if ($creationcontext ne '.') { 4602: next if (($context ne '') && ($context ne $creationcontext)); 4603: } 4604: if ($createdbefore > 0) { 4605: next if (($created eq '') || ($created > $createdbefore)); 4606: } 4607: if ($createdafter > 0) { 4608: next if (($created eq '') || ($created <= $createdafter)); 4609: } 4610: if ($catfilter ne '') { 4611: next if ($items->{'categories'} eq ''); 4612: my @categories = split('&',$items->{'categories'}); 4613: next if (@categories == 0); 4614: my @subcats = split('&',$catfilter); 4615: my $matchcat = 0; 4616: foreach my $cat (@categories) { 4617: if (grep(/^\Q$cat\E$/,@subcats)) { 4618: $matchcat = 1; 4619: last; 4620: } 4621: } 4622: next if (!$matchcat); 4623: } 4624: if ($caller eq 'coursecatalog') { 4625: if ($items->{'hidefromcat'} eq 'yes') { 4626: next if !$showhidden; 4627: } 4628: } 4629: } else { 4630: next if ($catfilter ne ''); 4631: next if ($selfenrollonly); 4632: next if ($createdbefore || $createdafter); 4633: next if ($creationcontext ne '.'); 4634: if ((defined($clonerudom)) && (defined($cloneruname))) { 4635: if ($cc_clone{$unesc_key}) { 4636: $canclone = 1; 4637: $val{'cloners'} = &escape($cloneruname.':'.$clonerudom); 4638: } 4639: } 4640: $is_hash = 0; 4641: my @courseitems = split(/:/,$value); 4642: $lasttime = pop(@courseitems); 4643: if ($hashref->{$lasttime_key} eq '') { 4644: next if ($lasttime<$since); 4645: } 4646: ($val{'descr'},$val{'inst_code'},$val{'owner'},$val{'type'}) = @courseitems; 4647: } 4648: if ($cloneonly) { 4649: next unless ($canclone); 4650: } 4651: my $match = 1; 4652: if ($description ne '.') { 4653: if (!$is_hash) { 4654: $unesc_val{'descr'} = &unescape($val{'descr'}); 4655: } 4656: if (eval{$unesc_val{'descr'} !~ /\Q$description\E/i}) { 4657: $match = 0; 4658: } 4659: } 4660: if ($instcodefilter ne '.') { 4661: if (!$is_hash) { 4662: $unesc_val{'inst_code'} = &unescape($val{'inst_code'}); 4663: } 4664: if ($regexp_ok == 1) { 4665: if (eval{$unesc_val{'inst_code'} !~ /$instcodefilter/}) { 4666: $match = 0; 4667: } 4668: } elsif ($regexp_ok == -1) { 4669: if (eval{$unesc_val{'inst_code'} =~ /$instcodefilter/}) { 4670: $match = 0; 4671: } 4672: } else { 4673: if (eval{$unesc_val{'inst_code'} !~ /\Q$instcodefilter\E/i}) { 4674: $match = 0; 4675: } 4676: } 4677: } 4678: if ($ownerfilter ne '.') { 4679: if (!$is_hash) { 4680: $unesc_val{'owner'} = &unescape($val{'owner'}); 4681: } 4682: if (($ownerunamefilter ne '') && ($ownerdomfilter ne '')) { 4683: if ($unesc_val{'owner'} =~ /:/) { 4684: if (eval{$unesc_val{'owner'} !~ 4685: /\Q$ownerunamefilter\E:\Q$ownerdomfilter\E$/i}) { 4686: $match = 0; 4687: } 4688: } else { 4689: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E/i}) { 4690: $match = 0; 4691: } 4692: } 4693: } elsif ($ownerunamefilter ne '') { 4694: if ($unesc_val{'owner'} =~ /:/) { 4695: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E:[^:]+$/i}) { 4696: $match = 0; 4697: } 4698: } else { 4699: if (eval{$unesc_val{'owner'} !~ /\Q$ownerunamefilter\E/i}) { 4700: $match = 0; 4701: } 4702: } 4703: } elsif ($ownerdomfilter ne '') { 4704: if ($unesc_val{'owner'} =~ /:/) { 4705: if (eval{$unesc_val{'owner'} !~ /^[^:]+:\Q$ownerdomfilter\E/}) { 4706: $match = 0; 4707: } 4708: } else { 4709: if ($ownerdomfilter ne $udom) { 4710: $match = 0; 4711: } 4712: } 4713: } 4714: } 4715: if ($coursefilter ne '.') { 4716: if (eval{$unesc_key !~ /^$udom(_)\Q$coursefilter\E$/}) { 4717: $match = 0; 4718: } 4719: } 4720: if ($typefilter ne '.') { 4721: if (!$is_hash) { 4722: $unesc_val{'type'} = &unescape($val{'type'}); 4723: } 4724: if ($unesc_val{'type'} eq '') { 4725: if ($typefilter ne 'Course') { 4726: $match = 0; 4727: } 4728: } else { 4729: if (eval{$unesc_val{'type'} !~ /^\Q$typefilter\E$/}) { 4730: $match = 0; 4731: } 4732: } 4733: } 4734: if ($match == 1) { 4735: if ($rtn_as_hash) { 4736: if ($is_hash) { 4737: if ($valchange) { 4738: my $newvalue = &Apache::lonnet::freeze_escape($items); 4739: $qresult.=$key.'='.$newvalue.'&'; 4740: } else { 4741: $qresult.=$key.'='.$value.'&'; 4742: } 4743: } else { 4744: my %rtnhash = ( 'description' => &unescape($val{'descr'}), 4745: 'inst_code' => &unescape($val{'inst_code'}), 4746: 'owner' => &unescape($val{'owner'}), 4747: 'type' => &unescape($val{'type'}), 4748: 'cloners' => &unescape($val{'cloners'}), 4749: ); 4750: my $items = &Apache::lonnet::freeze_escape(\%rtnhash); 4751: $qresult.=$key.'='.$items.'&'; 4752: } 4753: } else { 4754: if ($is_hash) { 4755: $qresult .= $key.'='.&escape($unesc_val{'descr'}).':'. 4756: &escape($unesc_val{'inst_code'}).':'. 4757: &escape($unesc_val{'owner'}).'&'; 4758: } else { 4759: $qresult .= $key.'='.$val{'descr'}.':'.$val{'inst_code'}. 4760: ':'.$val{'owner'}.'&'; 4761: } 4762: } 4763: } 4764: } 4765: if (&untie_domain_hash($hashref)) { 4766: chop($qresult); 4767: &Reply($client, \$qresult, $userinput); 4768: } else { 4769: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". 4770: "while attempting courseiddump\n", $userinput); 4771: } 4772: } else { 4773: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ". 4774: "while attempting courseiddump\n", $userinput); 4775: } 4776: return 1; 4777: } 4778: &register_handler("courseiddump", \&dump_course_id_handler, 0, 1, 0); 4779: 4780: sub course_lastaccess_handler { 4781: my ($cmd, $tail, $client) = @_; 4782: my $userinput = "$cmd:$tail"; 4783: my ($cdom,$cnum) = split(':',$tail); 4784: my (%lastaccess,$qresult); 4785: my $hashref = &tie_domain_hash($cdom, "nohist_courseids", &GDBM_WRCREAT()); 4786: if ($hashref) { 4787: while (my ($key,$value) = each(%$hashref)) { 4788: my ($unesc_key,$lasttime); 4789: $unesc_key = &unescape($key); 4790: if ($cnum) { 4791: next unless ($unesc_key =~ /\Q$cdom\E_\Q$cnum\E$/); 4792: } 4793: if ($unesc_key =~ /^lasttime:($LONCAPA::match_domain\_$LONCAPA::match_courseid)/) { 4794: $lastaccess{$1} = $value; 4795: } else { 4796: my $items = &Apache::lonnet::thaw_unescape($value); 4797: if (ref($items) eq 'HASH') { 4798: unless ($lastaccess{$unesc_key}) { 4799: $lastaccess{$unesc_key} = ''; 4800: } 4801: } else { 4802: my @courseitems = split(':',$value); 4803: $lastaccess{$unesc_key} = pop(@courseitems); 4804: } 4805: } 4806: } 4807: foreach my $cid (sort(keys(%lastaccess))) { 4808: $qresult.=&escape($cid).'='.$lastaccess{$cid}.'&'; 4809: } 4810: if (&untie_domain_hash($hashref)) { 4811: if ($qresult) { 4812: chop($qresult); 4813: } 4814: &Reply($client, \$qresult, $userinput); 4815: } else { 4816: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". 4817: "while attempting lastacourseaccess\n", $userinput); 4818: } 4819: } else { 4820: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ". 4821: "while attempting lastcourseaccess\n", $userinput); 4822: } 4823: return 1; 4824: } 4825: &register_handler("courselastaccess",\&course_lastaccess_handler, 0, 1, 0); 4826: 4827: # 4828: # Puts an unencrypted entry in a namespace db file at the domain level 4829: # 4830: # Parameters: 4831: # $cmd - The command that got us here. 4832: # $tail - Tail of the command (remaining parameters). 4833: # $client - File descriptor connected to client. 4834: # Returns 4835: # 0 - Requested to exit, caller should shut down. 4836: # 1 - Continue processing. 4837: # Side effects: 4838: # reply is written to $client. 4839: # 4840: sub put_domain_handler { 4841: my ($cmd,$tail,$client) = @_; 4842: 4843: my $userinput = "$cmd:$tail"; 4844: 4845: my ($udom,$namespace,$what) =split(/:/,$tail,3); 4846: chomp($what); 4847: my @pairs=split(/\&/,$what); 4848: my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_WRCREAT(), 4849: "P", $what); 4850: if ($hashref) { 4851: foreach my $pair (@pairs) { 4852: my ($key,$value)=split(/=/,$pair); 4853: $hashref->{$key}=$value; 4854: } 4855: if (&untie_domain_hash($hashref)) { 4856: &Reply($client, "ok\n", $userinput); 4857: } else { 4858: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". 4859: "while attempting putdom\n", $userinput); 4860: } 4861: } else { 4862: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ". 4863: "while attempting putdom\n", $userinput); 4864: } 4865: 4866: return 1; 4867: } 4868: &register_handler("putdom", \&put_domain_handler, 0, 1, 0); 4869: 4870: # Updates one or more entries in clickers.db file at the domain level 4871: # 4872: # Parameters: 4873: # $cmd - The command that got us here. 4874: # $tail - Tail of the command (remaining parameters). 4875: # In this case a colon separated list containing: 4876: # (a) the domain for which we are updating the entries, 4877: # (b) the action required -- add or del -- and 4878: # (c) a &-separated list of entries to add or delete. 4879: # $client - File descriptor connected to client. 4880: # Returns 4881: # 1 - Continue processing. 4882: # 0 - Requested to exit, caller should shut down. 4883: # Side effects: 4884: # reply is written to $client. 4885: # 4886: 4887: 4888: sub update_clickers { 4889: my ($cmd, $tail, $client) = @_; 4890: 4891: my $userinput = "$cmd:$tail"; 4892: my ($udom,$action,$what) =split(/:/,$tail,3); 4893: chomp($what); 4894: 4895: my $hashref = &tie_domain_hash($udom, "clickers", &GDBM_WRCREAT(), 4896: "U","$action:$what"); 4897: 4898: if (!$hashref) { 4899: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ". 4900: "while attempting updateclickers\n", $userinput); 4901: return 1; 4902: } 4903: 4904: my @pairs=split(/\&/,$what); 4905: foreach my $pair (@pairs) { 4906: my ($key,$value)=split(/=/,$pair); 4907: if ($action eq 'add') { 4908: if (exists($hashref->{$key})) { 4909: my @newvals = split(/,/,&unescape($value)); 4910: my @currvals = split(/,/,&unescape($hashref->{$key})); 4911: my @merged = sort(keys(%{{map { $_ => 1 } (@newvals,@currvals)}})); 4912: $hashref->{$key}=&escape(join(',',@merged)); 4913: } else { 4914: $hashref->{$key}=$value; 4915: } 4916: } elsif ($action eq 'del') { 4917: if (exists($hashref->{$key})) { 4918: my %current; 4919: map { $current{$_} = 1; } split(/,/,&unescape($hashref->{$key})); 4920: map { delete($current{$_}); } split(/,/,&unescape($value)); 4921: if (keys(%current)) { 4922: $hashref->{$key}=&escape(join(',',sort(keys(%current)))); 4923: } else { 4924: delete($hashref->{$key}); 4925: } 4926: } 4927: } 4928: } 4929: if (&untie_user_hash($hashref)) { 4930: &Reply( $client, "ok\n", $userinput); 4931: } else { 4932: &Failure($client, "error: ".($!+0)." untie(GDBM) failed ". 4933: "while attempting put\n", 4934: $userinput); 4935: } 4936: return 1; 4937: } 4938: &register_handler("updateclickers", \&update_clickers, 0, 1, 0); 4939: 4940: 4941: # Deletes one or more entries in a namespace db file at the domain level 4942: # 4943: # Parameters: 4944: # $cmd - The command that got us here. 4945: # $tail - Tail of the command (remaining parameters). 4946: # In this case a colon separated list containing: 4947: # (a) the domain for which we are deleting the entries, 4948: # (b) &-separated list of keys to delete. 4949: # $client - File descriptor connected to client. 4950: # Returns 4951: # 1 - Continue processing. 4952: # 0 - Requested to exit, caller should shut down. 4953: # Side effects: 4954: # reply is written to $client. 4955: # 4956: 4957: sub del_domain_handler { 4958: my ($cmd,$tail,$client) = @_; 4959: 4960: my $userinput = "$cmd:$tail"; 4961: 4962: my ($udom,$namespace,$what)=split(/:/,$tail,3); 4963: chomp($what); 4964: my $hashref = &tie_domain_hash($udom,$namespace,&GDBM_WRCREAT(), 4965: "D", $what); 4966: if ($hashref) { 4967: my @keys=split(/\&/,$what); 4968: foreach my $key (@keys) { 4969: delete($hashref->{$key}); 4970: } 4971: if (&untie_user_hash($hashref)) { 4972: &Reply($client, "ok\n", $userinput); 4973: } else { 4974: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". 4975: "while attempting deldom\n", $userinput); 4976: } 4977: } else { 4978: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ". 4979: "while attempting deldom\n", $userinput); 4980: } 4981: return 1; 4982: } 4983: &register_handler("deldom", \&del_domain_handler, 0, 1, 0); 4984: 4985: 4986: # Unencrypted get from the namespace database file at the domain level. 4987: # This function retrieves a keyed item from a specific named database in the 4988: # domain directory. 4989: # 4990: # Parameters: 4991: # $cmd - Command request keyword (get). 4992: # $tail - Tail of the command. This is a colon separated list 4993: # consisting of the domain and the 'namespace' 4994: # which selects the gdbm file to do the lookup in, 4995: # & separated list of keys to lookup. Note that 4996: # the values are returned as an & separated list too. 4997: # $client - File descriptor open on the client. 4998: # Returns: 4999: # 1 - Continue processing. 5000: # 0 - Exit. 5001: # Side effects: 5002: # reply is written to $client. 5003: # 5004: 5005: sub get_domain_handler { 5006: my ($cmd, $tail, $client) = @_; 5007: 5008: 5009: my $userinput = "$cmd:$tail"; 5010: 5011: my ($udom,$namespace,$what)=split(/:/,$tail,3); 5012: chomp($what); 5013: if ($namespace =~ /^enc/) { 5014: &Failure( $client, "refused\n", $userinput); 5015: } else { 5016: my @queries=split(/\&/,$what); 5017: my $qresult=''; 5018: my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_READER()); 5019: if ($hashref) { 5020: for (my $i=0;$i<=$#queries;$i++) { 5021: $qresult.="$hashref->{$queries[$i]}&"; 5022: } 5023: if (&untie_domain_hash($hashref)) { 5024: $qresult=~s/\&$//; 5025: &Reply($client, \$qresult, $userinput); 5026: } else { 5027: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ". 5028: "while attempting getdom\n",$userinput); 5029: } 5030: } else { 5031: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ". 5032: "while attempting getdom\n",$userinput); 5033: } 5034: } 5035: 5036: return 1; 5037: } 5038: &register_handler("getdom", \&get_domain_handler, 0, 1, 0); 5039: 5040: sub encrypted_get_domain_handler { 5041: my ($cmd, $tail, $client) = @_; 5042: 5043: my $userinput = "$cmd:$tail"; 5044: 5045: my ($udom,$namespace,$what)=split(/:/,$tail,3); 5046: chomp($what); 5047: my @queries=split(/\&/,$what); 5048: my $qresult=''; 5049: my $hashref = &tie_domain_hash($udom, "$namespace", &GDBM_READER()); 5050: if ($hashref) { 5051: for (my $i=0;$i<=$#queries;$i++) { 5052: $qresult.="$hashref->{$queries[$i]}&"; 5053: } 5054: if (&untie_domain_hash($hashref)) { 5055: $qresult=~s/\&$//; 5056: if ($cipher) { 5057: my $cmdlength=length($qresult); 5058: $qresult.=" "; 5059: my $encqresult=''; 5060: for (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) { 5061: $encqresult.= unpack("H16", 5062: $cipher->encrypt(substr($qresult, 5063: $encidx, 5064: 8))); 5065: } 5066: &Reply( $client, "enc:$cmdlength:$encqresult\n", $userinput); 5067: } else { 5068: &Failure( $client, "error:no_key\n", $userinput); 5069: } 5070: } else { 5071: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ". 5072: "while attempting egetdom\n",$userinput); 5073: } 5074: } else { 5075: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ". 5076: "while attempting egetdom\n",$userinput); 5077: } 5078: return 1; 5079: } 5080: &register_handler("egetdom", \&encrypted_get_domain_handler, 1, 1, 0); 5081: 5082: # 5083: # Puts an id to a domains id database. 5084: # 5085: # Parameters: 5086: # $cmd - The command that triggered us. 5087: # $tail - Remainder of the request other than the command. This is a 5088: # colon separated list containing: 5089: # $domain - The domain for which we are writing the id. 5090: # $pairs - The id info to write... this is and & separated list 5091: # of keyword=value. 5092: # $client - Socket open on the client. 5093: # Returns: 5094: # 1 - Continue processing. 5095: # Side effects: 5096: # reply is written to $client. 5097: # 5098: sub put_id_handler { 5099: my ($cmd,$tail,$client) = @_; 5100: 5101: 5102: my $userinput = "$cmd:$tail"; 5103: 5104: my ($udom,$what)=split(/:/,$tail); 5105: chomp($what); 5106: my @pairs=split(/\&/,$what); 5107: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_WRCREAT(), 5108: "P", $what); 5109: if ($hashref) { 5110: foreach my $pair (@pairs) { 5111: my ($key,$value)=split(/=/,$pair); 5112: $hashref->{$key}=$value; 5113: } 5114: if (&untie_domain_hash($hashref)) { 5115: &Reply($client, "ok\n", $userinput); 5116: } else { 5117: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". 5118: "while attempting idput\n", $userinput); 5119: } 5120: } else { 5121: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ". 5122: "while attempting idput\n", $userinput); 5123: } 5124: 5125: return 1; 5126: } 5127: &register_handler("idput", \&put_id_handler, 0, 1, 0); 5128: 5129: # 5130: # Retrieves a set of id values from the id database. 5131: # Returns an & separated list of results, one for each requested id to the 5132: # client. 5133: # 5134: # Parameters: 5135: # $cmd - Command keyword that caused us to be dispatched. 5136: # $tail - Tail of the command. Consists of a colon separated: 5137: # domain - the domain whose id table we dump 5138: # ids Consists of an & separated list of 5139: # id keywords whose values will be fetched. 5140: # nonexisting keywords will have an empty value. 5141: # $client - Socket open on the client. 5142: # 5143: # Returns: 5144: # 1 - indicating processing should continue. 5145: # Side effects: 5146: # An & separated list of results is written to $client. 5147: # 5148: sub get_id_handler { 5149: my ($cmd, $tail, $client) = @_; 5150: 5151: 5152: my $userinput = "$client:$tail"; 5153: 5154: my ($udom,$what)=split(/:/,$tail); 5155: chomp($what); 5156: my @queries=split(/\&/,$what); 5157: my $qresult=''; 5158: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_READER()); 5159: if ($hashref) { 5160: for (my $i=0;$i<=$#queries;$i++) { 5161: $qresult.="$hashref->{$queries[$i]}&"; 5162: } 5163: if (&untie_domain_hash($hashref)) { 5164: $qresult=~s/\&$//; 5165: &Reply($client, \$qresult, $userinput); 5166: } else { 5167: &Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ". 5168: "while attempting idget\n",$userinput); 5169: } 5170: } else { 5171: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ". 5172: "while attempting idget\n",$userinput); 5173: } 5174: 5175: return 1; 5176: } 5177: &register_handler("idget", \&get_id_handler, 0, 1, 0); 5178: 5179: # Deletes one or more ids in a domain's id database. 5180: # 5181: # Parameters: 5182: # $cmd - Command keyword (iddel). 5183: # $tail - Command tail. In this case a colon 5184: # separated list containing: 5185: # The domain for which we are deleting the id(s). 5186: # &-separated list of id(s) to delete. 5187: # $client - File open on client socket. 5188: # Returns: 5189: # 1 - Continue processing 5190: # 0 - Exit server. 5191: # 5192: # 5193: 5194: sub del_id_handler { 5195: my ($cmd,$tail,$client) = @_; 5196: 5197: my $userinput = "$cmd:$tail"; 5198: 5199: my ($udom,$what)=split(/:/,$tail); 5200: chomp($what); 5201: my $hashref = &tie_domain_hash($udom, "ids", &GDBM_WRCREAT(), 5202: "D", $what); 5203: if ($hashref) { 5204: my @keys=split(/\&/,$what); 5205: foreach my $key (@keys) { 5206: delete($hashref->{$key}); 5207: } 5208: if (&untie_user_hash($hashref)) { 5209: &Reply($client, "ok\n", $userinput); 5210: } else { 5211: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". 5212: "while attempting iddel\n", $userinput); 5213: } 5214: } else { 5215: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ". 5216: "while attempting iddel\n", $userinput); 5217: } 5218: return 1; 5219: } 5220: &register_handler("iddel", \&del_id_handler, 0, 1, 0); 5221: 5222: # 5223: # Puts broadcast e-mail sent by Domain Coordinator in nohist_dcmail database 5224: # 5225: # Parameters 5226: # $cmd - Command keyword that caused us to be dispatched. 5227: # $tail - Tail of the command. Consists of a colon separated: 5228: # domain - the domain whose dcmail we are recording 5229: # email Consists of key=value pair 5230: # where key is unique msgid 5231: # and value is message (in XML) 5232: # $client - Socket open on the client. 5233: # 5234: # Returns: 5235: # 1 - indicating processing should continue. 5236: # Side effects 5237: # reply is written to $client. 5238: # 5239: sub put_dcmail_handler { 5240: my ($cmd,$tail,$client) = @_; 5241: my $userinput = "$cmd:$tail"; 5242: 5243: 5244: my ($udom,$what)=split(/:/,$tail); 5245: chomp($what); 5246: my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT()); 5247: if ($hashref) { 5248: my ($key,$value)=split(/=/,$what); 5249: $hashref->{$key}=$value; 5250: } 5251: if (&untie_domain_hash($hashref)) { 5252: &Reply($client, "ok\n", $userinput); 5253: } else { 5254: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". 5255: "while attempting dcmailput\n", $userinput); 5256: } 5257: return 1; 5258: } 5259: &register_handler("dcmailput", \&put_dcmail_handler, 0, 1, 0); 5260: 5261: # 5262: # Retrieves broadcast e-mail from nohist_dcmail database 5263: # Returns to client an & separated list of key=value pairs, 5264: # where key is msgid and value is message information. 5265: # 5266: # Parameters 5267: # $cmd - Command keyword that caused us to be dispatched. 5268: # $tail - Tail of the command. Consists of a colon separated: 5269: # domain - the domain whose dcmail table we dump 5270: # startfilter - beginning of time window 5271: # endfilter - end of time window 5272: # sendersfilter - & separated list of username:domain 5273: # for senders to search for. 5274: # $client - Socket open on the client. 5275: # 5276: # Returns: 5277: # 1 - indicating processing should continue. 5278: # Side effects 5279: # reply (& separated list of msgid=messageinfo pairs) is 5280: # written to $client. 5281: # 5282: sub dump_dcmail_handler { 5283: my ($cmd, $tail, $client) = @_; 5284: 5285: my $userinput = "$cmd:$tail"; 5286: my ($udom,$startfilter,$endfilter,$sendersfilter) = split(/:/,$tail); 5287: chomp($sendersfilter); 5288: my @senders = (); 5289: if (defined($startfilter)) { 5290: $startfilter=&unescape($startfilter); 5291: } else { 5292: $startfilter='.'; 5293: } 5294: if (defined($endfilter)) { 5295: $endfilter=&unescape($endfilter); 5296: } else { 5297: $endfilter='.'; 5298: } 5299: if (defined($sendersfilter)) { 5300: $sendersfilter=&unescape($sendersfilter); 5301: @senders = map { &unescape($_) } split(/\&/,$sendersfilter); 5302: } 5303: 5304: my $qresult=''; 5305: my $hashref = &tie_domain_hash($udom, "nohist_dcmail", &GDBM_WRCREAT()); 5306: if ($hashref) { 5307: while (my ($key,$value) = each(%$hashref)) { 5308: my $match = 1; 5309: my ($timestamp,$subj,$uname,$udom) = 5310: split(/:/,&unescape(&unescape($key)),5); # yes, twice really 5311: $subj = &unescape($subj); 5312: unless ($startfilter eq '.' || !defined($startfilter)) { 5313: if ($timestamp < $startfilter) { 5314: $match = 0; 5315: } 5316: } 5317: unless ($endfilter eq '.' || !defined($endfilter)) { 5318: if ($timestamp > $endfilter) { 5319: $match = 0; 5320: } 5321: } 5322: unless (@senders < 1) { 5323: unless (grep/^$uname:$udom$/,@senders) { 5324: $match = 0; 5325: } 5326: } 5327: if ($match == 1) { 5328: $qresult.=$key.'='.$value.'&'; 5329: } 5330: } 5331: if (&untie_domain_hash($hashref)) { 5332: chop($qresult); 5333: &Reply($client, \$qresult, $userinput); 5334: } else { 5335: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". 5336: "while attempting dcmaildump\n", $userinput); 5337: } 5338: } else { 5339: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ". 5340: "while attempting dcmaildump\n", $userinput); 5341: } 5342: return 1; 5343: } 5344: 5345: &register_handler("dcmaildump", \&dump_dcmail_handler, 0, 1, 0); 5346: 5347: # 5348: # Puts domain roles in nohist_domainroles database 5349: # 5350: # Parameters 5351: # $cmd - Command keyword that caused us to be dispatched. 5352: # $tail - Tail of the command. Consists of a colon separated: 5353: # domain - the domain whose roles we are recording 5354: # role - Consists of key=value pair 5355: # where key is unique role 5356: # and value is start/end date information 5357: # $client - Socket open on the client. 5358: # 5359: # Returns: 5360: # 1 - indicating processing should continue. 5361: # Side effects 5362: # reply is written to $client. 5363: # 5364: 5365: sub put_domainroles_handler { 5366: my ($cmd,$tail,$client) = @_; 5367: 5368: my $userinput = "$cmd:$tail"; 5369: my ($udom,$what)=split(/:/,$tail); 5370: chomp($what); 5371: my @pairs=split(/\&/,$what); 5372: my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT()); 5373: if ($hashref) { 5374: foreach my $pair (@pairs) { 5375: my ($key,$value)=split(/=/,$pair); 5376: $hashref->{$key}=$value; 5377: } 5378: if (&untie_domain_hash($hashref)) { 5379: &Reply($client, "ok\n", $userinput); 5380: } else { 5381: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". 5382: "while attempting domroleput\n", $userinput); 5383: } 5384: } else { 5385: &Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ". 5386: "while attempting domroleput\n", $userinput); 5387: } 5388: 5389: return 1; 5390: } 5391: 5392: &register_handler("domroleput", \&put_domainroles_handler, 0, 1, 0); 5393: 5394: # 5395: # Retrieves domain roles from nohist_domainroles database 5396: # Returns to client an & separated list of key=value pairs, 5397: # where key is role and value is start and end date information. 5398: # 5399: # Parameters 5400: # $cmd - Command keyword that caused us to be dispatched. 5401: # $tail - Tail of the command. Consists of a colon separated: 5402: # domain - the domain whose domain roles table we dump 5403: # $client - Socket open on the client. 5404: # 5405: # Returns: 5406: # 1 - indicating processing should continue. 5407: # Side effects 5408: # reply (& separated list of role=start/end info pairs) is 5409: # written to $client. 5410: # 5411: sub dump_domainroles_handler { 5412: my ($cmd, $tail, $client) = @_; 5413: 5414: my $userinput = "$cmd:$tail"; 5415: my ($udom,$startfilter,$endfilter,$rolesfilter) = split(/:/,$tail); 5416: chomp($rolesfilter); 5417: my @roles = (); 5418: if (defined($startfilter)) { 5419: $startfilter=&unescape($startfilter); 5420: } else { 5421: $startfilter='.'; 5422: } 5423: if (defined($endfilter)) { 5424: $endfilter=&unescape($endfilter); 5425: } else { 5426: $endfilter='.'; 5427: } 5428: if (defined($rolesfilter)) { 5429: $rolesfilter=&unescape($rolesfilter); 5430: @roles = split(/\&/,$rolesfilter); 5431: } 5432: 5433: my $hashref = &tie_domain_hash($udom, "nohist_domainroles", &GDBM_WRCREAT()); 5434: if ($hashref) { 5435: my $qresult = ''; 5436: while (my ($key,$value) = each(%$hashref)) { 5437: my $match = 1; 5438: my ($end,$start) = split(/:/,&unescape($value)); 5439: my ($trole,$uname,$udom,$runame,$rudom,$rsec) = split(/:/,&unescape($key)); 5440: unless (@roles < 1) { 5441: unless (grep/^\Q$trole\E$/,@roles) { 5442: $match = 0; 5443: next; 5444: } 5445: } 5446: unless ($startfilter eq '.' || !defined($startfilter)) { 5447: if ((defined($start)) && ($start >= $startfilter)) { 5448: $match = 0; 5449: next; 5450: } 5451: } 5452: unless ($endfilter eq '.' || !defined($endfilter)) { 5453: if ((defined($end)) && (($end > 0) && ($end <= $endfilter))) { 5454: $match = 0; 5455: next; 5456: } 5457: } 5458: if ($match == 1) { 5459: $qresult.=$key.'='.$value.'&'; 5460: } 5461: } 5462: if (&untie_domain_hash($hashref)) { 5463: chop($qresult); 5464: &Reply($client, \$qresult, $userinput); 5465: } else { 5466: &Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". 5467: "while attempting domrolesdump\n", $userinput); 5468: } 5469: } else { 5470: &Failure($client, "error: ".($!+0)." tie(GDBM) Failed ". 5471: "while attempting domrolesdump\n", $userinput); 5472: } 5473: return 1; 5474: } 5475: 5476: &register_handler("domrolesdump", \&dump_domainroles_handler, 0, 1, 0); 5477: 5478: 5479: # Process the tmpput command I'm not sure what this does.. Seems to 5480: # create a file in the lonDaemons/tmp directory of the form $id.tmp 5481: # where Id is the client's ip concatenated with a sequence number. 5482: # The file will contain some value that is passed in. Is this e.g. 5483: # a login token? 5484: # 5485: # Parameters: 5486: # $cmd - The command that got us dispatched. 5487: # $tail - The remainder of the request following $cmd: 5488: # In this case this will be the contents of the file. 5489: # $client - Socket connected to the client. 5490: # Returns: 5491: # 1 indicating processing can continue. 5492: # Side effects: 5493: # A file is created in the local filesystem. 5494: # A reply is sent to the client. 5495: sub tmp_put_handler { 5496: my ($cmd, $what, $client) = @_; 5497: 5498: my $userinput = "$cmd:$what"; # Reconstruct for logging. 5499: 5500: my ($record,$context) = split(/:/,$what); 5501: if ($context ne '') { 5502: chomp($context); 5503: $context = &unescape($context); 5504: } 5505: my ($id,$store); 5506: $tmpsnum++; 5507: if (($context eq 'resetpw') || ($context eq 'createaccount')) { 5508: $id = &md5_hex(&md5_hex(time.{}.rand().$$)); 5509: } else { 5510: $id = $$.'_'.$clientip.'_'.$tmpsnum; 5511: } 5512: $id=~s/\W/\_/g; 5513: $record=~s/\n//g; 5514: my $execdir=$perlvar{'lonDaemons'}; 5515: if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) { 5516: print $store $record; 5517: close $store; 5518: &Reply($client, \$id, $userinput); 5519: } else { 5520: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ". 5521: "while attempting tmpput\n", $userinput); 5522: } 5523: return 1; 5524: 5525: } 5526: &register_handler("tmpput", \&tmp_put_handler, 0, 1, 0); 5527: 5528: # Processes the tmpget command. This command returns the contents 5529: # of a temporary resource file(?) created via tmpput. 5530: # 5531: # Paramters: 5532: # $cmd - Command that got us dispatched. 5533: # $id - Tail of the command, contain the id of the resource 5534: # we want to fetch. 5535: # $client - socket open on the client. 5536: # Return: 5537: # 1 - Inidcating processing can continue. 5538: # Side effects: 5539: # A reply is sent to the client. 5540: # 5541: sub tmp_get_handler { 5542: my ($cmd, $id, $client) = @_; 5543: 5544: my $userinput = "$cmd:$id"; 5545: 5546: 5547: $id=~s/\W/\_/g; 5548: my $store; 5549: my $execdir=$perlvar{'lonDaemons'}; 5550: if ($store=IO::File->new("$execdir/tmp/$id.tmp")) { 5551: my $reply=<$store>; 5552: &Reply( $client, \$reply, $userinput); 5553: close $store; 5554: } else { 5555: &Failure( $client, "error: ".($!+0)."IO::File->new Failed ". 5556: "while attempting tmpget\n", $userinput); 5557: } 5558: 5559: return 1; 5560: } 5561: &register_handler("tmpget", \&tmp_get_handler, 0, 1, 0); 5562: 5563: # 5564: # Process the tmpdel command. This command deletes a temp resource 5565: # created by the tmpput command. 5566: # 5567: # Parameters: 5568: # $cmd - Command that got us here. 5569: # $id - Id of the temporary resource created. 5570: # $client - socket open on the client process. 5571: # 5572: # Returns: 5573: # 1 - Indicating processing should continue. 5574: # Side Effects: 5575: # A file is deleted 5576: # A reply is sent to the client. 5577: sub tmp_del_handler { 5578: my ($cmd, $id, $client) = @_; 5579: 5580: my $userinput= "$cmd:$id"; 5581: 5582: chomp($id); 5583: $id=~s/\W/\_/g; 5584: my $execdir=$perlvar{'lonDaemons'}; 5585: if (unlink("$execdir/tmp/$id.tmp")) { 5586: &Reply($client, "ok\n", $userinput); 5587: } else { 5588: &Failure( $client, "error: ".($!+0)."Unlink tmp Failed ". 5589: "while attempting tmpdel\n", $userinput); 5590: } 5591: 5592: return 1; 5593: 5594: } 5595: &register_handler("tmpdel", \&tmp_del_handler, 0, 1, 0); 5596: 5597: # 5598: # Process the delbalcookie command. This command deletes a balancer 5599: # cookie in the lonBalancedir directory created by switchserver 5600: # 5601: # Parameters: 5602: # $cmd - Command that got us here. 5603: # $cookie - Cookie to be deleted. 5604: # $client - socket open on the client process. 5605: # 5606: # Returns: 5607: # 1 - Indicating processing should continue. 5608: # Side Effects: 5609: # A cookie file is deleted from the lonBalancedir directory 5610: # A reply is sent to the client. 5611: sub del_balcookie_handler { 5612: my ($cmd, $cookie, $client) = @_; 5613: 5614: my $userinput= "$cmd:$cookie"; 5615: 5616: chomp($cookie); 5617: my $deleted = ''; 5618: if ($cookie =~ /^$LONCAPA::match_domain\_$LONCAPA::match_username\_[a-f0-9]{32}$/) { 5619: my $execdir=$perlvar{'lonBalanceDir'}; 5620: if (-e "$execdir/$cookie.id") { 5621: if (open(my $fh,'<',"$execdir/$cookie.id")) { 5622: my $dodelete; 5623: while (my $line = <$fh>) { 5624: chomp($line); 5625: if ($line eq $clientname) { 5626: $dodelete = 1; 5627: last; 5628: } 5629: } 5630: close($fh); 5631: if ($dodelete) { 5632: if (unlink("$execdir/$cookie.id")) { 5633: $deleted = 1; 5634: } 5635: } 5636: } 5637: } 5638: } 5639: if ($deleted) { 5640: &Reply($client, "ok\n", $userinput); 5641: } else { 5642: &Failure( $client, "error: ".($!+0)."Unlinking cookie file Failed ". 5643: "while attempting delbalcookie\n", $userinput); 5644: } 5645: return 1; 5646: } 5647: &register_handler("delbalcookie", \&del_balcookie_handler, 0, 1, 0); 5648: 5649: # 5650: # Processes the setannounce command. This command 5651: # creates a file named announce.txt in the top directory of 5652: # the documentn root and sets its contents. The announce.txt file is 5653: # printed in its entirety at the LonCAPA login page. Note: 5654: # once the announcement.txt fileis created it cannot be deleted. 5655: # However, setting the contents of the file to empty removes the 5656: # announcement from the login page of loncapa so who cares. 5657: # 5658: # Parameters: 5659: # $cmd - The command that got us dispatched. 5660: # $announcement - The text of the announcement. 5661: # $client - Socket open on the client process. 5662: # Retunrns: 5663: # 1 - Indicating request processing should continue 5664: # Side Effects: 5665: # The file {DocRoot}/announcement.txt is created. 5666: # A reply is sent to $client. 5667: # 5668: sub set_announce_handler { 5669: my ($cmd, $announcement, $client) = @_; 5670: 5671: my $userinput = "$cmd:$announcement"; 5672: 5673: chomp($announcement); 5674: $announcement=&unescape($announcement); 5675: if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}. 5676: '/announcement.txt')) { 5677: print $store $announcement; 5678: close $store; 5679: &Reply($client, "ok\n", $userinput); 5680: } else { 5681: &Failure($client, "error: ".($!+0)."\n", $userinput); 5682: } 5683: 5684: return 1; 5685: } 5686: &register_handler("setannounce", \&set_announce_handler, 0, 1, 0); 5687: 5688: # 5689: # Return the version of the daemon. This can be used to determine 5690: # the compatibility of cross version installations or, alternatively to 5691: # simply know who's out of date and who isn't. Note that the version 5692: # is returned concatenated with the tail. 5693: # Parameters: 5694: # $cmd - the request that dispatched to us. 5695: # $tail - Tail of the request (client's version?). 5696: # $client - Socket open on the client. 5697: #Returns: 5698: # 1 - continue processing requests. 5699: # Side Effects: 5700: # Replies with version to $client. 5701: sub get_version_handler { 5702: my ($cmd, $tail, $client) = @_; 5703: 5704: my $userinput = $cmd.$tail; 5705: 5706: &Reply($client, &version($userinput)."\n", $userinput); 5707: 5708: 5709: return 1; 5710: } 5711: &register_handler("version", \&get_version_handler, 0, 1, 0); 5712: 5713: # Set the current host and domain. This is used to support 5714: # multihomed systems. Each IP of the system, or even separate daemons 5715: # on the same IP can be treated as handling a separate lonCAPA virtual 5716: # machine. This command selects the virtual lonCAPA. The client always 5717: # knows the right one since it is lonc and it is selecting the domain/system 5718: # from the hosts.tab file. 5719: # Parameters: 5720: # $cmd - Command that dispatched us. 5721: # $tail - Tail of the command (domain/host requested). 5722: # $socket - Socket open on the client. 5723: # 5724: # Returns: 5725: # 1 - Indicates the program should continue to process requests. 5726: # Side-effects: 5727: # The default domain/system context is modified for this daemon. 5728: # a reply is sent to the client. 5729: # 5730: sub set_virtual_host_handler { 5731: my ($cmd, $tail, $socket) = @_; 5732: 5733: my $userinput ="$cmd:$tail"; 5734: 5735: &Reply($client, &sethost($userinput)."\n", $userinput); 5736: 5737: 5738: return 1; 5739: } 5740: &register_handler("sethost", \&set_virtual_host_handler, 0, 1, 0); 5741: 5742: # Process a request to exit: 5743: # - "bye" is sent to the client. 5744: # - The client socket is shutdown and closed. 5745: # - We indicate to the caller that we should exit. 5746: # Formal Parameters: 5747: # $cmd - The command that got us here. 5748: # $tail - Tail of the command (empty). 5749: # $client - Socket open on the tail. 5750: # Returns: 5751: # 0 - Indicating the program should exit!! 5752: # 5753: sub exit_handler { 5754: my ($cmd, $tail, $client) = @_; 5755: 5756: my $userinput = "$cmd:$tail"; 5757: 5758: &logthis("Client $clientip ($clientname) hanging up: $userinput"); 5759: &Reply($client, "bye\n", $userinput); 5760: $client->shutdown(2); # shutdown the socket forcibly. 5761: $client->close(); 5762: 5763: return 0; 5764: } 5765: &register_handler("exit", \&exit_handler, 0,1,1); 5766: &register_handler("init", \&exit_handler, 0,1,1); 5767: &register_handler("quit", \&exit_handler, 0,1,1); 5768: 5769: # Determine if auto-enrollment is enabled. 5770: # Note that the original had what I believe to be a defect. 5771: # The original returned 0 if the requestor was not a registerd client. 5772: # It should return "refused". 5773: # Formal Parameters: 5774: # $cmd - The command that invoked us. 5775: # $tail - The tail of the command (Extra command parameters. 5776: # $client - The socket open on the client that issued the request. 5777: # Returns: 5778: # 1 - Indicating processing should continue. 5779: # 5780: sub enrollment_enabled_handler { 5781: my ($cmd, $tail, $client) = @_; 5782: my $userinput = $cmd.":".$tail; # For logging purposes. 5783: 5784: 5785: my ($cdom) = split(/:/, $tail, 2); # Domain we're asking about. 5786: 5787: my $outcome = &localenroll::run($cdom); 5788: &Reply($client, \$outcome, $userinput); 5789: 5790: return 1; 5791: } 5792: &register_handler("autorun", \&enrollment_enabled_handler, 0, 1, 0); 5793: 5794: # 5795: # Validate an institutional code used for a LON-CAPA course. 5796: # 5797: # Formal Parameters: 5798: # $cmd - The command request that got us dispatched. 5799: # $tail - The tail of the command. In this case, 5800: # this is a colon separated set of words that will be split 5801: # into: 5802: # $dom - The domain for which the check of 5803: # institutional course code will occur. 5804: # 5805: # $instcode - The institutional code for the course 5806: # being requested, or validated for rights 5807: # to request. 5808: # 5809: # $owner - The course requestor (who will be the 5810: # course owner, in the form username:domain 5811: # 5812: # $client - Socket open on the client. 5813: # Returns: 5814: # 1 - Indicating processing should continue. 5815: # 5816: sub validate_instcode_handler { 5817: my ($cmd, $tail, $client) = @_; 5818: my $userinput = "$cmd:$tail"; 5819: my ($dom,$instcode,$owner) = split(/:/, $tail); 5820: $instcode = &unescape($instcode); 5821: $owner = &unescape($owner); 5822: my ($outcome,$description,$credits) = 5823: &localenroll::validate_instcode($dom,$instcode,$owner); 5824: my $result = &escape($outcome).'&'.&escape($description).'&'. 5825: &escape($credits); 5826: &Reply($client, \$result, $userinput); 5827: 5828: return 1; 5829: } 5830: &register_handler("autovalidateinstcode", \&validate_instcode_handler, 0, 1, 0); 5831: 5832: # Get the official sections for which auto-enrollment is possible. 5833: # Since the admin people won't know about 'unofficial sections' 5834: # we cannot auto-enroll on them. 5835: # Formal Parameters: 5836: # $cmd - The command request that got us dispatched here. 5837: # $tail - The remainder of the request. In our case this 5838: # will be split into: 5839: # $coursecode - The course name from the admin point of view. 5840: # $cdom - The course's domain(?). 5841: # $client - Socket open on the client. 5842: # Returns: 5843: # 1 - Indiciting processing should continue. 5844: # 5845: sub get_sections_handler { 5846: my ($cmd, $tail, $client) = @_; 5847: my $userinput = "$cmd:$tail"; 5848: 5849: my ($coursecode, $cdom) = split(/:/, $tail); 5850: my @secs = &localenroll::get_sections($coursecode,$cdom); 5851: my $seclist = &escape(join(':',@secs)); 5852: 5853: &Reply($client, \$seclist, $userinput); 5854: 5855: 5856: return 1; 5857: } 5858: &register_handler("autogetsections", \&get_sections_handler, 0, 1, 0); 5859: 5860: # Validate the owner of a new course section. 5861: # 5862: # Formal Parameters: 5863: # $cmd - Command that got us dispatched. 5864: # $tail - the remainder of the command. For us this consists of a 5865: # colon separated string containing: 5866: # $inst - Course Id from the institutions point of view. 5867: # $owner - Proposed owner of the course. 5868: # $cdom - Domain of the course (from the institutions 5869: # point of view?).. 5870: # $client - Socket open on the client. 5871: # 5872: # Returns: 5873: # 1 - Processing should continue. 5874: # 5875: sub validate_course_owner_handler { 5876: my ($cmd, $tail, $client) = @_; 5877: my $userinput = "$cmd:$tail"; 5878: my ($inst_course_id, $owner, $cdom, $coowners) = split(/:/, $tail); 5879: 5880: $owner = &unescape($owner); 5881: $coowners = &unescape($coowners); 5882: my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom,$coowners); 5883: &Reply($client, \$outcome, $userinput); 5884: 5885: 5886: 5887: return 1; 5888: } 5889: &register_handler("autonewcourse", \&validate_course_owner_handler, 0, 1, 0); 5890: 5891: # 5892: # Validate a course section in the official schedule of classes 5893: # from the institutions point of view (part of autoenrollment). 5894: # 5895: # Formal Parameters: 5896: # $cmd - The command request that got us dispatched. 5897: # $tail - The tail of the command. In this case, 5898: # this is a colon separated set of words that will be split 5899: # into: 5900: # $inst_course_id - The course/section id from the 5901: # institutions point of view. 5902: # $cdom - The domain from the institutions 5903: # point of view. 5904: # $client - Socket open on the client. 5905: # Returns: 5906: # 1 - Indicating processing should continue. 5907: # 5908: sub validate_course_section_handler { 5909: my ($cmd, $tail, $client) = @_; 5910: my $userinput = "$cmd:$tail"; 5911: my ($inst_course_id, $cdom) = split(/:/, $tail); 5912: 5913: my $outcome=&localenroll::validate_courseID($inst_course_id,$cdom); 5914: &Reply($client, \$outcome, $userinput); 5915: 5916: 5917: return 1; 5918: } 5919: &register_handler("autovalidatecourse", \&validate_course_section_handler, 0, 1, 0); 5920: 5921: # 5922: # Validate course owner's access to enrollment data for specific class section. 5923: # 5924: # 5925: # Formal Parameters: 5926: # $cmd - The command request that got us dispatched. 5927: # $tail - The tail of the command. In this case this is a colon separated 5928: # set of values that will be split into: 5929: # $inst_class - Institutional code for the specific class section 5930: # $ownerlist - An escaped comma-separated list of username:domain 5931: # of the course owner, and co-owner(s). 5932: # $cdom - The domain of the course from the institution's 5933: # point of view. 5934: # $client - The socket open on the client. 5935: # Returns: 5936: # 1 - continue processing. 5937: # 5938: 5939: sub validate_class_access_handler { 5940: my ($cmd, $tail, $client) = @_; 5941: my $userinput = "$cmd:$tail"; 5942: my ($inst_class,$ownerlist,$cdom) = split(/:/, $tail); 5943: my $owners = &unescape($ownerlist); 5944: my $outcome; 5945: eval { 5946: local($SIG{__DIE__})='DEFAULT'; 5947: $outcome=&localenroll::check_section($inst_class,$owners,$cdom); 5948: }; 5949: &Reply($client,\$outcome, $userinput); 5950: 5951: return 1; 5952: } 5953: &register_handler("autovalidateclass_sec", \&validate_class_access_handler, 0, 1, 0); 5954: 5955: # 5956: # Validate course owner or co-owners(s) access to enrollment data for all sections 5957: # and crosslistings for a particular course. 5958: # 5959: # 5960: # Formal Parameters: 5961: # $cmd - The command request that got us dispatched. 5962: # $tail - The tail of the command. In this case this is a colon separated 5963: # set of values that will be split into: 5964: # $ownerlist - An escaped comma-separated list of username:domain 5965: # of the course owner, and co-owner(s). 5966: # $cdom - The domain of the course from the institution's 5967: # point of view. 5968: # $classes - Frozen hash of institutional course sections and 5969: # crosslistings. 5970: # $client - The socket open on the client. 5971: # Returns: 5972: # 1 - continue processing. 5973: # 5974: 5975: sub validate_classes_handler { 5976: my ($cmd, $tail, $client) = @_; 5977: my $userinput = "$cmd:$tail"; 5978: my ($ownerlist,$cdom,$classes) = split(/:/, $tail); 5979: my $classesref = &Apache::lonnet::thaw_unescape($classes); 5980: my $owners = &unescape($ownerlist); 5981: my $result; 5982: eval { 5983: local($SIG{__DIE__})='DEFAULT'; 5984: my %validations; 5985: my $response = &localenroll::check_instclasses($owners,$cdom,$classesref, 5986: \%validations); 5987: if ($response eq 'ok') { 5988: foreach my $key (keys(%validations)) { 5989: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($validations{$key}).'&'; 5990: } 5991: $result =~ s/\&$//; 5992: } else { 5993: $result = 'error'; 5994: } 5995: }; 5996: if (!$@) { 5997: &Reply($client, \$result, $userinput); 5998: } else { 5999: &Failure($client,"unknown_cmd\n",$userinput); 6000: } 6001: return 1; 6002: } 6003: &register_handler("autovalidateinstclasses", \&validate_classes_handler, 0, 1, 0); 6004: 6005: # 6006: # Create a password for a new LON-CAPA user added by auto-enrollment. 6007: # Only used for case where authentication method for new user is localauth 6008: # 6009: # Formal Parameters: 6010: # $cmd - The command request that got us dispatched. 6011: # $tail - The tail of the command. In this case this is a colon separated 6012: # set of words that will be split into: 6013: # $authparam - An authentication parameter (localauth parameter). 6014: # $cdom - The domain of the course from the institution's 6015: # point of view. 6016: # $client - The socket open on the client. 6017: # Returns: 6018: # 1 - continue processing. 6019: # 6020: sub create_auto_enroll_password_handler { 6021: my ($cmd, $tail, $client) = @_; 6022: my $userinput = "$cmd:$tail"; 6023: 6024: my ($authparam, $cdom) = split(/:/, $userinput); 6025: 6026: my ($create_passwd,$authchk); 6027: ($authparam, 6028: $create_passwd, 6029: $authchk) = &localenroll::create_password($authparam,$cdom); 6030: 6031: &Reply($client, &escape($authparam.':'.$create_passwd.':'.$authchk)."\n", 6032: $userinput); 6033: 6034: 6035: return 1; 6036: } 6037: &register_handler("autocreatepassword", \&create_auto_enroll_password_handler, 6038: 0, 1, 0); 6039: 6040: sub auto_export_grades_handler { 6041: my ($cmd, $tail, $client) = @_; 6042: my $userinput = "$cmd:$tail"; 6043: my ($cdom,$cnum,$info,$data) = split(/:/,$tail); 6044: my $inforef = &Apache::lonnet::thaw_unescape($info); 6045: my $dataref = &Apache::lonnet::thaw_unescape($data); 6046: my ($outcome,$result);; 6047: eval { 6048: local($SIG{__DIE__})='DEFAULT'; 6049: my %rtnhash; 6050: $outcome=&localenroll::export_grades($cdom,$cnum,$inforef,$dataref,\%rtnhash); 6051: if ($outcome eq 'ok') { 6052: foreach my $key (keys(%rtnhash)) { 6053: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rtnhash{$key}).'&'; 6054: } 6055: $result =~ s/\&$//; 6056: } 6057: }; 6058: if (!$@) { 6059: if ($outcome eq 'ok') { 6060: if ($cipher) { 6061: my $cmdlength=length($result); 6062: $result.=" "; 6063: my $encresult=''; 6064: for (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) { 6065: $encresult.= unpack("H16", 6066: $cipher->encrypt(substr($result, 6067: $encidx, 6068: 8))); 6069: } 6070: &Reply( $client, "enc:$cmdlength:$encresult\n", $userinput); 6071: } else { 6072: &Failure( $client, "error:no_key\n", $userinput); 6073: } 6074: } else { 6075: &Reply($client, "$outcome\n", $userinput); 6076: } 6077: } else { 6078: &Failure($client,"export_error\n",$userinput); 6079: } 6080: return 1; 6081: } 6082: &register_handler("autoexportgrades", \&auto_export_grades_handler, 6083: 1, 1, 0); 6084: 6085: # Retrieve and remove temporary files created by/during autoenrollment. 6086: # 6087: # Formal Parameters: 6088: # $cmd - The command that got us dispatched. 6089: # $tail - The tail of the command. In our case this is a colon 6090: # separated list that will be split into: 6091: # $filename - The name of the file to retrieve. 6092: # The filename is given as a path relative to 6093: # the LonCAPA temp file directory. 6094: # $client - Socket open on the client. 6095: # 6096: # Returns: 6097: # 1 - Continue processing. 6098: sub retrieve_auto_file_handler { 6099: my ($cmd, $tail, $client) = @_; 6100: my $userinput = "cmd:$tail"; 6101: 6102: my ($filename) = split(/:/, $tail); 6103: 6104: my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename; 6105: 6106: if ($filename =~m{/\.\./}) { 6107: &Failure($client, "refused\n", $userinput); 6108: } elsif ($filename !~ /^$LONCAPA::match_domain\_$LONCAPA::match_courseid\_.+_classlist\.xml$/) { 6109: &Failure($client, "refused\n", $userinput); 6110: } elsif ( (-e $source) && ($filename ne '') ) { 6111: my $reply = ''; 6112: if (open(my $fh,$source)) { 6113: while (<$fh>) { 6114: chomp($_); 6115: $_ =~ s/^\s+//g; 6116: $_ =~ s/\s+$//g; 6117: $reply .= $_; 6118: } 6119: close($fh); 6120: &Reply($client, &escape($reply)."\n", $userinput); 6121: 6122: # Does this have to be uncommented??!? (RF). 6123: # 6124: # unlink($source); 6125: } else { 6126: &Failure($client, "error\n", $userinput); 6127: } 6128: } else { 6129: &Failure($client, "error\n", $userinput); 6130: } 6131: 6132: 6133: return 1; 6134: } 6135: &register_handler("autoretrieve", \&retrieve_auto_file_handler, 0,1,0); 6136: 6137: sub crsreq_checks_handler { 6138: my ($cmd, $tail, $client) = @_; 6139: my $userinput = "$cmd:$tail"; 6140: my $dom = $tail; 6141: my $result; 6142: my @reqtypes = ('official','unofficial','community','textbook','placement'); 6143: eval { 6144: local($SIG{__DIE__})='DEFAULT'; 6145: my %validations; 6146: my $response = &localenroll::crsreq_checks($dom,\@reqtypes, 6147: \%validations); 6148: if ($response eq 'ok') { 6149: foreach my $key (keys(%validations)) { 6150: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($validations{$key}).'&'; 6151: } 6152: $result =~ s/\&$//; 6153: } else { 6154: $result = 'error'; 6155: } 6156: }; 6157: if (!$@) { 6158: &Reply($client, \$result, $userinput); 6159: } else { 6160: &Failure($client,"unknown_cmd\n",$userinput); 6161: } 6162: return 1; 6163: } 6164: &register_handler("autocrsreqchecks", \&crsreq_checks_handler, 0, 1, 0); 6165: 6166: sub validate_crsreq_handler { 6167: my ($cmd, $tail, $client) = @_; 6168: my $userinput = "$cmd:$tail"; 6169: my ($dom,$owner,$crstype,$inststatuslist,$instcode,$instseclist,$customdata) = split(/:/, $tail); 6170: $instcode = &unescape($instcode); 6171: $owner = &unescape($owner); 6172: $crstype = &unescape($crstype); 6173: $inststatuslist = &unescape($inststatuslist); 6174: $instcode = &unescape($instcode); 6175: $instseclist = &unescape($instseclist); 6176: my $custominfo = &Apache::lonnet::thaw_unescape($customdata); 6177: my $outcome; 6178: eval { 6179: local($SIG{__DIE__})='DEFAULT'; 6180: $outcome = &localenroll::validate_crsreq($dom,$owner,$crstype, 6181: $inststatuslist,$instcode, 6182: $instseclist,$custominfo); 6183: }; 6184: if (!$@) { 6185: &Reply($client, \$outcome, $userinput); 6186: } else { 6187: &Failure($client,"unknown_cmd\n",$userinput); 6188: } 6189: return 1; 6190: } 6191: &register_handler("autocrsreqvalidation", \&validate_crsreq_handler, 0, 1, 0); 6192: 6193: sub crsreq_update_handler { 6194: my ($cmd, $tail, $client) = @_; 6195: my $userinput = "$cmd:$tail"; 6196: my ($cdom,$cnum,$crstype,$action,$ownername,$ownerdomain,$fullname,$title,$code, 6197: $accessstart,$accessend,$infohashref) = 6198: split(/:/, $tail); 6199: $crstype = &unescape($crstype); 6200: $action = &unescape($action); 6201: $ownername = &unescape($ownername); 6202: $ownerdomain = &unescape($ownerdomain); 6203: $fullname = &unescape($fullname); 6204: $title = &unescape($title); 6205: $code = &unescape($code); 6206: $accessstart = &unescape($accessstart); 6207: $accessend = &unescape($accessend); 6208: my $incoming = &Apache::lonnet::thaw_unescape($infohashref); 6209: my ($result,$outcome); 6210: eval { 6211: local($SIG{__DIE__})='DEFAULT'; 6212: my %rtnhash; 6213: $outcome = &localenroll::crsreq_updates($cdom,$cnum,$crstype,$action, 6214: $ownername,$ownerdomain,$fullname, 6215: $title,$code,$accessstart,$accessend, 6216: $incoming,\%rtnhash); 6217: if ($outcome eq 'ok') { 6218: my @posskeys = qw(createdweb createdmsg createdcustomized createdactions queuedweb queuedmsg formitems reviewweb validationjs onload javascript); 6219: foreach my $key (keys(%rtnhash)) { 6220: if (grep(/^\Q$key\E/,@posskeys)) { 6221: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rtnhash{$key}).'&'; 6222: } 6223: } 6224: $result =~ s/\&$//; 6225: } 6226: }; 6227: if (!$@) { 6228: if ($outcome eq 'ok') { 6229: &Reply($client, \$result, $userinput); 6230: } else { 6231: &Reply($client, "format_error\n", $userinput); 6232: } 6233: } else { 6234: &Failure($client,"unknown_cmd\n",$userinput); 6235: } 6236: return 1; 6237: } 6238: &register_handler("autocrsrequpdate", \&crsreq_update_handler, 0, 1, 0); 6239: 6240: # 6241: # Read and retrieve institutional code format (for support form). 6242: # Formal Parameters: 6243: # $cmd - Command that dispatched us. 6244: # $tail - Tail of the command. In this case it conatins 6245: # the course domain and the coursename. 6246: # $client - Socket open on the client. 6247: # Returns: 6248: # 1 - Continue processing. 6249: # 6250: sub get_institutional_code_format_handler { 6251: my ($cmd, $tail, $client) = @_; 6252: my $userinput = "$cmd:$tail"; 6253: 6254: my $reply; 6255: my($cdom,$course) = split(/:/,$tail); 6256: my @pairs = split/\&/,$course; 6257: my %instcodes = (); 6258: my %codes = (); 6259: my @codetitles = (); 6260: my %cat_titles = (); 6261: my %cat_order = (); 6262: foreach (@pairs) { 6263: my ($key,$value) = split/=/,$_; 6264: $instcodes{&unescape($key)} = &unescape($value); 6265: } 6266: my $formatreply = &localenroll::instcode_format($cdom, 6267: \%instcodes, 6268: \%codes, 6269: \@codetitles, 6270: \%cat_titles, 6271: \%cat_order); 6272: if ($formatreply eq 'ok') { 6273: my $codes_str = &Apache::lonnet::hash2str(%codes); 6274: my $codetitles_str = &Apache::lonnet::array2str(@codetitles); 6275: my $cat_titles_str = &Apache::lonnet::hash2str(%cat_titles); 6276: my $cat_order_str = &Apache::lonnet::hash2str(%cat_order); 6277: &Reply($client, 6278: $codes_str.':'.$codetitles_str.':'.$cat_titles_str.':' 6279: .$cat_order_str."\n", 6280: $userinput); 6281: } else { 6282: # this else branch added by RF since if not ok, lonc will 6283: # hang waiting on reply until timeout. 6284: # 6285: &Reply($client, "format_error\n", $userinput); 6286: } 6287: 6288: return 1; 6289: } 6290: &register_handler("autoinstcodeformat", 6291: \&get_institutional_code_format_handler,0,1,0); 6292: 6293: sub get_institutional_defaults_handler { 6294: my ($cmd, $tail, $client) = @_; 6295: my $userinput = "$cmd:$tail"; 6296: 6297: my $dom = $tail; 6298: my %defaults_hash; 6299: my @code_order; 6300: my $outcome; 6301: eval { 6302: local($SIG{__DIE__})='DEFAULT'; 6303: $outcome = &localenroll::instcode_defaults($dom,\%defaults_hash, 6304: \@code_order); 6305: }; 6306: if (!$@) { 6307: if ($outcome eq 'ok') { 6308: my $result=''; 6309: while (my ($key,$value) = each(%defaults_hash)) { 6310: $result.=&escape($key).'='.&escape($value).'&'; 6311: } 6312: $result .= 'code_order='.&escape(join('&',@code_order)); 6313: &Reply($client,\$result,$userinput); 6314: } else { 6315: &Reply($client,"error\n", $userinput); 6316: } 6317: } else { 6318: &Failure($client,"unknown_cmd\n",$userinput); 6319: } 6320: } 6321: &register_handler("autoinstcodedefaults", 6322: \&get_institutional_defaults_handler,0,1,0); 6323: 6324: sub get_possible_instcodes_handler { 6325: my ($cmd, $tail, $client) = @_; 6326: my $userinput = "$cmd:$tail"; 6327: 6328: my $reply; 6329: my $cdom = $tail; 6330: my (@codetitles,%cat_titles,%cat_order,@code_order); 6331: my $formatreply = &localenroll::possible_instcodes($cdom, 6332: \@codetitles, 6333: \%cat_titles, 6334: \%cat_order, 6335: \@code_order); 6336: if ($formatreply eq 'ok') { 6337: my $result = join('&',map {&escape($_);} (@codetitles)).':'; 6338: $result .= join('&',map {&escape($_);} (@code_order)).':'; 6339: foreach my $key (keys(%cat_titles)) { 6340: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($cat_titles{$key}).'&'; 6341: } 6342: $result =~ s/\&$//; 6343: $result .= ':'; 6344: foreach my $key (keys(%cat_order)) { 6345: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($cat_order{$key}).'&'; 6346: } 6347: $result =~ s/\&$//; 6348: &Reply($client,\$result,$userinput); 6349: } else { 6350: &Reply($client, "format_error\n", $userinput); 6351: } 6352: return 1; 6353: } 6354: &register_handler("autopossibleinstcodes", 6355: \&get_possible_instcodes_handler,0,1,0); 6356: 6357: sub get_institutional_user_rules { 6358: my ($cmd, $tail, $client) = @_; 6359: my $userinput = "$cmd:$tail"; 6360: my $dom = &unescape($tail); 6361: my (%rules_hash,@rules_order); 6362: my $outcome; 6363: eval { 6364: local($SIG{__DIE__})='DEFAULT'; 6365: $outcome = &localenroll::username_rules($dom,\%rules_hash,\@rules_order); 6366: }; 6367: if (!$@) { 6368: if ($outcome eq 'ok') { 6369: my $result; 6370: foreach my $key (keys(%rules_hash)) { 6371: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&'; 6372: } 6373: $result =~ s/\&$//; 6374: $result .= ':'; 6375: if (@rules_order > 0) { 6376: foreach my $item (@rules_order) { 6377: $result .= &escape($item).'&'; 6378: } 6379: } 6380: $result =~ s/\&$//; 6381: &Reply($client,\$result,$userinput); 6382: } else { 6383: &Reply($client,"error\n", $userinput); 6384: } 6385: } else { 6386: &Failure($client,"unknown_cmd\n",$userinput); 6387: } 6388: } 6389: &register_handler("instuserrules",\&get_institutional_user_rules,0,1,0); 6390: 6391: sub get_institutional_id_rules { 6392: my ($cmd, $tail, $client) = @_; 6393: my $userinput = "$cmd:$tail"; 6394: my $dom = &unescape($tail); 6395: my (%rules_hash,@rules_order); 6396: my $outcome; 6397: eval { 6398: local($SIG{__DIE__})='DEFAULT'; 6399: $outcome = &localenroll::id_rules($dom,\%rules_hash,\@rules_order); 6400: }; 6401: if (!$@) { 6402: if ($outcome eq 'ok') { 6403: my $result; 6404: foreach my $key (keys(%rules_hash)) { 6405: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&'; 6406: } 6407: $result =~ s/\&$//; 6408: $result .= ':'; 6409: if (@rules_order > 0) { 6410: foreach my $item (@rules_order) { 6411: $result .= &escape($item).'&'; 6412: } 6413: } 6414: $result =~ s/\&$//; 6415: &Reply($client,\$result,$userinput); 6416: } else { 6417: &Reply($client,"error\n", $userinput); 6418: } 6419: } else { 6420: &Failure($client,"unknown_cmd\n",$userinput); 6421: } 6422: } 6423: &register_handler("instidrules",\&get_institutional_id_rules,0,1,0); 6424: 6425: sub get_institutional_selfcreate_rules { 6426: my ($cmd, $tail, $client) = @_; 6427: my $userinput = "$cmd:$tail"; 6428: my $dom = &unescape($tail); 6429: my (%rules_hash,@rules_order); 6430: my $outcome; 6431: eval { 6432: local($SIG{__DIE__})='DEFAULT'; 6433: $outcome = &localenroll::selfcreate_rules($dom,\%rules_hash,\@rules_order); 6434: }; 6435: if (!$@) { 6436: if ($outcome eq 'ok') { 6437: my $result; 6438: foreach my $key (keys(%rules_hash)) { 6439: $result .= &escape($key).'='.&Apache::lonnet::freeze_escape($rules_hash{$key}).'&'; 6440: } 6441: $result =~ s/\&$//; 6442: $result .= ':'; 6443: if (@rules_order > 0) { 6444: foreach my $item (@rules_order) { 6445: $result .= &escape($item).'&'; 6446: } 6447: } 6448: $result =~ s/\&$//; 6449: &Reply($client,\$result,$userinput); 6450: } else { 6451: &Reply($client,"error\n", $userinput); 6452: } 6453: } else { 6454: &Failure($client,"unknown_cmd\n",$userinput); 6455: } 6456: } 6457: &register_handler("instemailrules",\&get_institutional_selfcreate_rules,0,1,0); 6458: 6459: 6460: sub institutional_username_check { 6461: my ($cmd, $tail, $client) = @_; 6462: my $userinput = "$cmd:$tail"; 6463: my %rulecheck; 6464: my $outcome; 6465: my ($udom,$uname,@rules) = split(/:/,$tail); 6466: $udom = &unescape($udom); 6467: $uname = &unescape($uname); 6468: @rules = map {&unescape($_);} (@rules); 6469: eval { 6470: local($SIG{__DIE__})='DEFAULT'; 6471: $outcome = &localenroll::username_check($udom,$uname,\@rules,\%rulecheck); 6472: }; 6473: if (!$@) { 6474: if ($outcome eq 'ok') { 6475: my $result=''; 6476: foreach my $key (keys(%rulecheck)) { 6477: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&'; 6478: } 6479: &Reply($client,\$result,$userinput); 6480: } else { 6481: &Reply($client,"error\n", $userinput); 6482: } 6483: } else { 6484: &Failure($client,"unknown_cmd\n",$userinput); 6485: } 6486: } 6487: &register_handler("instrulecheck",\&institutional_username_check,0,1,0); 6488: 6489: sub institutional_id_check { 6490: my ($cmd, $tail, $client) = @_; 6491: my $userinput = "$cmd:$tail"; 6492: my %rulecheck; 6493: my $outcome; 6494: my ($udom,$id,@rules) = split(/:/,$tail); 6495: $udom = &unescape($udom); 6496: $id = &unescape($id); 6497: @rules = map {&unescape($_);} (@rules); 6498: eval { 6499: local($SIG{__DIE__})='DEFAULT'; 6500: $outcome = &localenroll::id_check($udom,$id,\@rules,\%rulecheck); 6501: }; 6502: if (!$@) { 6503: if ($outcome eq 'ok') { 6504: my $result=''; 6505: foreach my $key (keys(%rulecheck)) { 6506: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&'; 6507: } 6508: &Reply($client,\$result,$userinput); 6509: } else { 6510: &Reply($client,"error\n", $userinput); 6511: } 6512: } else { 6513: &Failure($client,"unknown_cmd\n",$userinput); 6514: } 6515: } 6516: &register_handler("instidrulecheck",\&institutional_id_check,0,1,0); 6517: 6518: sub institutional_selfcreate_check { 6519: my ($cmd, $tail, $client) = @_; 6520: my $userinput = "$cmd:$tail"; 6521: my %rulecheck; 6522: my $outcome; 6523: my ($udom,$email,@rules) = split(/:/,$tail); 6524: $udom = &unescape($udom); 6525: $email = &unescape($email); 6526: @rules = map {&unescape($_);} (@rules); 6527: eval { 6528: local($SIG{__DIE__})='DEFAULT'; 6529: $outcome = &localenroll::selfcreate_check($udom,$email,\@rules,\%rulecheck); 6530: }; 6531: if (!$@) { 6532: if ($outcome eq 'ok') { 6533: my $result=''; 6534: foreach my $key (keys(%rulecheck)) { 6535: $result.=&escape($key).'='.&Apache::lonnet::freeze_escape($rulecheck{$key}).'&'; 6536: } 6537: &Reply($client,\$result,$userinput); 6538: } else { 6539: &Reply($client,"error\n", $userinput); 6540: } 6541: } else { 6542: &Failure($client,"unknown_cmd\n",$userinput); 6543: } 6544: } 6545: &register_handler("instselfcreatecheck",\&institutional_selfcreate_check,0,1,0); 6546: 6547: # Get domain specific conditions for import of student photographs to a course 6548: # 6549: # Retrieves information from photo_permission subroutine in localenroll. 6550: # Returns outcome (ok) if no processing errors, and whether course owner is 6551: # required to accept conditions of use (yes/no). 6552: # 6553: # 6554: sub photo_permission_handler { 6555: my ($cmd, $tail, $client) = @_; 6556: my $userinput = "$cmd:$tail"; 6557: my $cdom = $tail; 6558: my ($perm_reqd,$conditions); 6559: my $outcome; 6560: eval { 6561: local($SIG{__DIE__})='DEFAULT'; 6562: $outcome = &localenroll::photo_permission($cdom,\$perm_reqd, 6563: \$conditions); 6564: }; 6565: if (!$@) { 6566: &Reply($client, &escape($outcome.':'.$perm_reqd.':'. $conditions)."\n", 6567: $userinput); 6568: } else { 6569: &Failure($client,"unknown_cmd\n",$userinput); 6570: } 6571: return 1; 6572: } 6573: &register_handler("autophotopermission",\&photo_permission_handler,0,1,0); 6574: 6575: # 6576: # Checks if student photo is available for a user in the domain, in the user's 6577: # directory (in /userfiles/internal/studentphoto.jpg). 6578: # Uses localstudentphoto:fetch() to ensure there is an up to date copy of 6579: # the student's photo. 6580: 6581: sub photo_check_handler { 6582: my ($cmd, $tail, $client) = @_; 6583: my $userinput = "$cmd:$tail"; 6584: my ($udom,$uname,$pid) = split(/:/,$tail); 6585: $udom = &unescape($udom); 6586: $uname = &unescape($uname); 6587: $pid = &unescape($pid); 6588: my $path=&propath($udom,$uname).'/userfiles/internal/'; 6589: if (!-e $path) { 6590: &mkpath($path); 6591: } 6592: my $response; 6593: my $result = &localstudentphoto::fetch($udom,$uname,$pid,\$response); 6594: $result .= ':'.$response; 6595: &Reply($client, &escape($result)."\n",$userinput); 6596: return 1; 6597: } 6598: &register_handler("autophotocheck",\&photo_check_handler,0,1,0); 6599: 6600: # 6601: # Retrieve information from localenroll about whether to provide a button 6602: # for users who have enbled import of student photos to initiate an 6603: # update of photo files for registered students. Also include 6604: # comment to display alongside button. 6605: 6606: sub photo_choice_handler { 6607: my ($cmd, $tail, $client) = @_; 6608: my $userinput = "$cmd:$tail"; 6609: my $cdom = &unescape($tail); 6610: my ($update,$comment); 6611: eval { 6612: local($SIG{__DIE__})='DEFAULT'; 6613: ($update,$comment) = &localenroll::manager_photo_update($cdom); 6614: }; 6615: if (!$@) { 6616: &Reply($client,&escape($update).':'.&escape($comment)."\n",$userinput); 6617: } else { 6618: &Failure($client,"unknown_cmd\n",$userinput); 6619: } 6620: return 1; 6621: } 6622: &register_handler("autophotochoice",\&photo_choice_handler,0,1,0); 6623: 6624: # 6625: # Gets a student's photo to exist (in the correct image type) in the user's 6626: # directory. 6627: # Formal Parameters: 6628: # $cmd - The command request that got us dispatched. 6629: # $tail - A colon separated set of words that will be split into: 6630: # $domain - student's domain 6631: # $uname - student username 6632: # $type - image type desired 6633: # $client - The socket open on the client. 6634: # Returns: 6635: # 1 - continue processing. 6636: 6637: sub student_photo_handler { 6638: my ($cmd, $tail, $client) = @_; 6639: my ($domain,$uname,$ext,$type) = split(/:/, $tail); 6640: 6641: my $path=&propath($domain,$uname). '/userfiles/internal/'; 6642: my $filename = 'studentphoto.'.$ext; 6643: if ($type eq 'thumbnail') { 6644: $filename = 'studentphoto_tn.'.$ext; 6645: } 6646: if (-e $path.$filename) { 6647: &Reply($client,"ok\n","$cmd:$tail"); 6648: return 1; 6649: } 6650: &mkpath($path); 6651: my $file; 6652: if ($type eq 'thumbnail') { 6653: eval { 6654: local($SIG{__DIE__})='DEFAULT'; 6655: $file=&localstudentphoto::fetch_thumbnail($domain,$uname); 6656: }; 6657: } else { 6658: $file=&localstudentphoto::fetch($domain,$uname); 6659: } 6660: if (!$file) { 6661: &Failure($client,"unavailable\n","$cmd:$tail"); 6662: return 1; 6663: } 6664: if (!-e $path.$filename) { &convert_photo($file,$path.$filename); } 6665: if (-e $path.$filename) { 6666: &Reply($client,"ok\n","$cmd:$tail"); 6667: return 1; 6668: } 6669: &Failure($client,"unable_to_convert\n","$cmd:$tail"); 6670: return 1; 6671: } 6672: &register_handler("studentphoto", \&student_photo_handler, 0, 1, 0); 6673: 6674: sub inst_usertypes_handler { 6675: my ($cmd, $domain, $client) = @_; 6676: my $res; 6677: my $userinput = $cmd.":".$domain; # For logging purposes. 6678: my (%typeshash,@order,$result); 6679: eval { 6680: local($SIG{__DIE__})='DEFAULT'; 6681: $result=&localenroll::inst_usertypes($domain,\%typeshash,\@order); 6682: }; 6683: if ($result eq 'ok') { 6684: if (keys(%typeshash) > 0) { 6685: foreach my $key (keys(%typeshash)) { 6686: $res.=&escape($key).'='.&escape($typeshash{$key}).'&'; 6687: } 6688: } 6689: $res=~s/\&$//; 6690: $res .= ':'; 6691: if (@order > 0) { 6692: foreach my $item (@order) { 6693: $res .= &escape($item).'&'; 6694: } 6695: } 6696: $res=~s/\&$//; 6697: } 6698: &Reply($client, \$res, $userinput); 6699: return 1; 6700: } 6701: &register_handler("inst_usertypes", \&inst_usertypes_handler, 0, 1, 0); 6702: 6703: # mkpath makes all directories for a file, expects an absolute path with a 6704: # file or a trailing / if just a dir is passed 6705: # returns 1 on success 0 on failure 6706: sub mkpath { 6707: my ($file)=@_; 6708: my @parts=split(/\//,$file,-1); 6709: my $now=$parts[0].'/'.$parts[1].'/'.$parts[2]; 6710: for (my $i=3;$i<= ($#parts-1);$i++) { 6711: $now.='/'.$parts[$i]; 6712: if (!-e $now) { 6713: if (!mkdir($now,0770)) { return 0; } 6714: } 6715: } 6716: return 1; 6717: } 6718: 6719: #--------------------------------------------------------------- 6720: # 6721: # Getting, decoding and dispatching requests: 6722: # 6723: # 6724: # Get a Request: 6725: # Gets a Request message from the client. The transaction 6726: # is defined as a 'line' of text. We remove the new line 6727: # from the text line. 6728: # 6729: sub get_request { 6730: my $input = <$client>; 6731: chomp($input); 6732: 6733: &Debug("get_request: Request = $input\n"); 6734: 6735: &status('Processing '.$clientname.':'.$input); 6736: 6737: return $input; 6738: } 6739: #--------------------------------------------------------------- 6740: # 6741: # Process a request. This sub should shrink as each action 6742: # gets farmed out into a separat sub that is registered 6743: # with the dispatch hash. 6744: # 6745: # Parameters: 6746: # user_input - The request received from the client (lonc). 6747: # 6748: # Returns: 6749: # true to keep processing, false if caller should exit. 6750: # 6751: sub process_request { 6752: my ($userinput) = @_; # Easier for now to break style than to 6753: # fix all the userinput -> user_input. 6754: my $wasenc = 0; # True if request was encrypted. 6755: # ------------------------------------------------------------ See if encrypted 6756: # for command 6757: # sethost:<server> 6758: # <command>:<args> 6759: # we just send it to the processor 6760: # for 6761: # sethost:<server>:<command>:<args> 6762: # we do the implict set host and then do the command 6763: if ($userinput =~ /^sethost:/) { 6764: (my $cmd,my $newid,$userinput) = split(':',$userinput,3); 6765: if (defined($userinput)) { 6766: &sethost("$cmd:$newid"); 6767: } else { 6768: $userinput = "$cmd:$newid"; 6769: } 6770: } 6771: 6772: if ($userinput =~ /^enc/) { 6773: $userinput = decipher($userinput); 6774: $wasenc=1; 6775: if(!$userinput) { # Cipher not defined. 6776: &Failure($client, "error: Encrypted data without negotated key\n"); 6777: return 0; 6778: } 6779: } 6780: Debug("process_request: $userinput\n"); 6781: 6782: # 6783: # The 'correct way' to add a command to lond is now to 6784: # write a sub to execute it and Add it to the command dispatch 6785: # hash via a call to register_handler.. The comments to that 6786: # sub should give you enough to go on to show how to do this 6787: # along with the examples that are building up as this code 6788: # is getting refactored. Until all branches of the 6789: # if/elseif monster below have been factored out into 6790: # separate procesor subs, if the dispatch hash is missing 6791: # the command keyword, we will fall through to the remainder 6792: # of the if/else chain below in order to keep this thing in 6793: # working order throughout the transmogrification. 6794: 6795: my ($command, $tail) = split(/:/, $userinput, 2); 6796: chomp($command); 6797: chomp($tail); 6798: $tail =~ s/(\r)//; # This helps people debugging with e.g. telnet. 6799: $command =~ s/(\r)//; # And this too for parameterless commands. 6800: if(!$tail) { 6801: $tail =""; # defined but blank. 6802: } 6803: 6804: &Debug("Command received: $command, encoded = $wasenc"); 6805: 6806: if(defined $Dispatcher{$command}) { 6807: 6808: my $dispatch_info = $Dispatcher{$command}; 6809: my $handler = $$dispatch_info[0]; 6810: my $need_encode = $$dispatch_info[1]; 6811: my $client_types = $$dispatch_info[2]; 6812: Debug("Matched dispatch hash: mustencode: $need_encode " 6813: ."ClientType $client_types"); 6814: 6815: # Validate the request: 6816: 6817: my $ok = 1; 6818: my $requesterprivs = 0; 6819: if(&isClient()) { 6820: $requesterprivs |= $CLIENT_OK; 6821: } 6822: if(&isManager()) { 6823: $requesterprivs |= $MANAGER_OK; 6824: } 6825: if($need_encode && (!$wasenc)) { 6826: Debug("Must encode but wasn't: $need_encode $wasenc"); 6827: $ok = 0; 6828: } 6829: if(($client_types & $requesterprivs) == 0) { 6830: Debug("Client not privileged to do this operation"); 6831: $ok = 0; 6832: } 6833: if ($ok) { 6834: my $realcommand = $command; 6835: if ($command eq 'querysend') { 6836: my ($query,$rest)=split(/\:/,$tail,2); 6837: $query=~s/\n*$//g; 6838: my @possqueries = 6839: qw(userlog courselog fetchenrollment institutionalphotos usersearch instdirsearch getinstuser getmultinstusers); 6840: if (grep(/^\Q$query\E$/,@possqueries)) { 6841: $command .= '_'.$query; 6842: } elsif ($query eq 'prepare activity log') { 6843: $command .= '_activitylog'; 6844: } 6845: } 6846: if (ref($trust{$command}) eq 'HASH') { 6847: my $donechecks; 6848: if ($trust{$command}{'anywhere'}) { 6849: $donechecks = 1; 6850: } elsif ($trust{$command}{'manageronly'}) { 6851: unless (&isManager()) { 6852: $ok = 0; 6853: } 6854: $donechecks = 1; 6855: } elsif ($trust{$command}{'institutiononly'}) { 6856: unless ($clientsameinst) { 6857: $ok = 0; 6858: } 6859: $donechecks = 1; 6860: } elsif ($clientsameinst) { 6861: $donechecks = 1; 6862: } 6863: unless ($donechecks) { 6864: foreach my $rule (keys(%{$trust{$command}})) { 6865: next if ($rule eq 'remote'); 6866: if ($trust{$command}{$rule}) { 6867: if ($clientprohibited{$rule}) { 6868: $ok = 0; 6869: } else { 6870: $ok = 1; 6871: $donechecks = 1; 6872: last; 6873: } 6874: } 6875: } 6876: } 6877: unless ($donechecks) { 6878: if ($trust{$command}{'remote'}) { 6879: if ($clientremoteok) { 6880: $ok = 1; 6881: } else { 6882: $ok = 0; 6883: } 6884: } 6885: } 6886: } 6887: $command = $realcommand; 6888: } 6889: 6890: if($ok) { 6891: Debug("Dispatching to handler $command $tail"); 6892: my $keep_going = &$handler($command, $tail, $client); 6893: return $keep_going; 6894: } else { 6895: Debug("Refusing to dispatch because client did not match requirements"); 6896: Failure($client, "refused\n", $userinput); 6897: return 1; 6898: } 6899: } 6900: 6901: print $client "unknown_cmd\n"; 6902: # -------------------------------------------------------------------- complete 6903: Debug("process_request - returning 1"); 6904: return 1; 6905: } 6906: # 6907: # Decipher encoded traffic 6908: # Parameters: 6909: # input - Encoded data. 6910: # Returns: 6911: # Decoded data or undef if encryption key was not yet negotiated. 6912: # Implicit input: 6913: # cipher - This global holds the negotiated encryption key. 6914: # 6915: sub decipher { 6916: my ($input) = @_; 6917: my $output = ''; 6918: 6919: 6920: if($cipher) { 6921: my($enc, $enclength, $encinput) = split(/:/, $input); 6922: for(my $encidx = 0; $encidx < length($encinput); $encidx += 16) { 6923: $output .= 6924: $cipher->decrypt(pack("H16", substr($encinput, $encidx, 16))); 6925: } 6926: return substr($output, 0, $enclength); 6927: } else { 6928: return undef; 6929: } 6930: } 6931: 6932: # 6933: # Register a command processor. This function is invoked to register a sub 6934: # to process a request. Once registered, the ProcessRequest sub can automatically 6935: # dispatch requests to an appropriate sub, and do the top level validity checking 6936: # as well: 6937: # - Is the keyword recognized. 6938: # - Is the proper client type attempting the request. 6939: # - Is the request encrypted if it has to be. 6940: # Parameters: 6941: # $request_name - Name of the request being registered. 6942: # This is the command request that will match 6943: # against the hash keywords to lookup the information 6944: # associated with the dispatch information. 6945: # $procedure - Reference to a sub to call to process the request. 6946: # All subs get called as follows: 6947: # Procedure($cmd, $tail, $replyfd, $key) 6948: # $cmd - the actual keyword that invoked us. 6949: # $tail - the tail of the request that invoked us. 6950: # $replyfd- File descriptor connected to the client 6951: # $must_encode - True if the request must be encoded to be good. 6952: # $client_ok - True if it's ok for a client to request this. 6953: # $manager_ok - True if it's ok for a manager to request this. 6954: # Side effects: 6955: # - On success, the Dispatcher hash has an entry added for the key $RequestName 6956: # - On failure, the program will die as it's a bad internal bug to try to 6957: # register a duplicate command handler. 6958: # 6959: sub register_handler { 6960: my ($request_name,$procedure,$must_encode, $client_ok,$manager_ok) = @_; 6961: 6962: # Don't allow duplication# 6963: 6964: if (defined $Dispatcher{$request_name}) { 6965: die "Attempting to define a duplicate request handler for $request_name\n"; 6966: } 6967: # Build the client type mask: 6968: 6969: my $client_type_mask = 0; 6970: if($client_ok) { 6971: $client_type_mask |= $CLIENT_OK; 6972: } 6973: if($manager_ok) { 6974: $client_type_mask |= $MANAGER_OK; 6975: } 6976: 6977: # Enter the hash: 6978: 6979: my @entry = ($procedure, $must_encode, $client_type_mask); 6980: 6981: $Dispatcher{$request_name} = \@entry; 6982: 6983: } 6984: 6985: 6986: #------------------------------------------------------------------ 6987: 6988: 6989: 6990: 6991: # 6992: # Convert an error return code from lcpasswd to a string value. 6993: # 6994: sub lcpasswdstrerror { 6995: my $ErrorCode = shift; 6996: if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) { 6997: return "lcpasswd Unrecognized error return value ".$ErrorCode; 6998: } else { 6999: return $passwderrors[$ErrorCode]; 7000: } 7001: } 7002: 7003: # grabs exception and records it to log before exiting 7004: sub catchexception { 7005: my ($error)=@_; 7006: $SIG{'QUIT'}='DEFAULT'; 7007: $SIG{__DIE__}='DEFAULT'; 7008: &status("Catching exception"); 7009: &logthis("CRITICAL: " 7010: ."ABNORMAL EXIT. Child $$ for server ".$perlvar{'lonHostID'}." died through " 7011: ."a crash with this error msg->[$error]"); 7012: &logthis('Famous last words: '.$status.' - '.$lastlog); 7013: if ($client) { print $client "error: $error\n"; } 7014: $server->close(); 7015: die($error); 7016: } 7017: sub timeout { 7018: &status("Handling Timeout"); 7019: &logthis("CRITICAL: TIME OUT ".$$.""); 7020: &catchexception('Timeout'); 7021: } 7022: # -------------------------------- Set signal handlers to record abnormal exits 7023: 7024: 7025: $SIG{'QUIT'}=\&catchexception; 7026: $SIG{__DIE__}=\&catchexception; 7027: 7028: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf 7029: &status("Read loncapa.conf and loncapa_apache.conf"); 7030: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf'); 7031: %perlvar=%{$perlvarref}; 7032: undef $perlvarref; 7033: 7034: # ----------------------------- Make sure this process is running from user=www 7035: my $wwwid=getpwnam('www'); 7036: if ($wwwid!=$<) { 7037: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}"; 7038: my $subj="LON: $currenthostid User ID mismatch"; 7039: system("echo 'User ID mismatch. lond must be run as user www.' |". 7040: " mail -s '$subj' $emailto > /dev/null"); 7041: exit 1; 7042: } 7043: 7044: # --------------------------------------------- Check if other instance running 7045: 7046: my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid"; 7047: 7048: if (-e $pidfile) { 7049: my $lfh=IO::File->new("$pidfile"); 7050: my $pide=<$lfh>; 7051: chomp($pide); 7052: if (kill 0 => $pide) { die "already running"; } 7053: } 7054: 7055: # ------------------------------------------------------------- Read hosts file 7056: 7057: 7058: 7059: # establish SERVER socket, bind and listen. 7060: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'}, 7061: Type => SOCK_STREAM, 7062: Proto => 'tcp', 7063: ReuseAddr => 1, 7064: Listen => 10 ) 7065: or die "making socket: $@\n"; 7066: 7067: # --------------------------------------------------------- Do global variables 7068: 7069: # global variables 7070: 7071: my %children = (); # keys are current child process IDs 7072: 7073: sub REAPER { # takes care of dead children 7074: $SIG{CHLD} = \&REAPER; 7075: &status("Handling child death"); 7076: my $pid; 7077: do { 7078: $pid = waitpid(-1,&WNOHANG()); 7079: if (defined($children{$pid})) { 7080: &logthis("Child $pid died"); 7081: delete($children{$pid}); 7082: } elsif ($pid > 0) { 7083: &logthis("Unknown Child $pid died"); 7084: } 7085: } while ( $pid > 0 ); 7086: foreach my $child (keys(%children)) { 7087: $pid = waitpid($child,&WNOHANG()); 7088: if ($pid > 0) { 7089: &logthis("Child $child - $pid looks like we missed it's death"); 7090: delete($children{$pid}); 7091: } 7092: } 7093: &status("Finished Handling child death"); 7094: } 7095: 7096: sub HUNTSMAN { # signal handler for SIGINT 7097: &status("Killing children (INT)"); 7098: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children 7099: kill 'INT' => keys %children; 7100: &logthis("Free socket: ".shutdown($server,2)); # free up socket 7101: my $execdir=$perlvar{'lonDaemons'}; 7102: unlink("$execdir/logs/lond.pid"); 7103: &logthis("CRITICAL: Shutting down"); 7104: &status("Done killing children"); 7105: exit; # clean up with dignity 7106: } 7107: 7108: sub HUPSMAN { # signal handler for SIGHUP 7109: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children 7110: &status("Killing children for restart (HUP)"); 7111: kill 'INT' => keys %children; 7112: &logthis("Free socket: ".shutdown($server,2)); # free up socket 7113: &logthis("CRITICAL: Restarting"); 7114: my $execdir=$perlvar{'lonDaemons'}; 7115: unlink("$execdir/logs/lond.pid"); 7116: &status("Restarting self (HUP)"); 7117: exec("$execdir/lond"); # here we go again 7118: } 7119: 7120: # 7121: # Reload the Apache daemon's state. 7122: # This is done by invoking /home/httpd/perl/apachereload 7123: # a setuid perl script that can be root for us to do this job. 7124: # 7125: sub ReloadApache { 7126: # --------------------------- Handle case of another apachereload process (locking) 7127: if (&LONCAPA::try_to_lock('/tmp/lock_apachereload')) { 7128: my $execdir = $perlvar{'lonDaemons'}; 7129: my $script = $execdir."/apachereload"; 7130: system($script); 7131: unlink('/tmp/lock_apachereload'); # Remove the lock file. 7132: } 7133: } 7134: 7135: # 7136: # Called in response to a USR2 signal. 7137: # - Reread hosts.tab 7138: # - All children connected to hosts that were removed from hosts.tab 7139: # are killed via SIGINT 7140: # - All children connected to previously existing hosts are sent SIGUSR1 7141: # - Our internal hosts hash is updated to reflect the new contents of 7142: # hosts.tab causing connections from hosts added to hosts.tab to 7143: # now be honored. 7144: # 7145: sub UpdateHosts { 7146: &status("Reload hosts.tab"); 7147: logthis(' Updating connections '); 7148: # 7149: # The %children hash has the set of IP's we currently have children 7150: # on. These need to be matched against records in the hosts.tab 7151: # Any ip's no longer in the table get killed off they correspond to 7152: # either dropped or changed hosts. Note that the re-read of the table 7153: # will take care of new and changed hosts as connections come into being. 7154: 7155: &Apache::lonnet::reset_hosts_info(); 7156: my %active; 7157: 7158: foreach my $child (keys(%children)) { 7159: my $childip = $children{$child}; 7160: if ($childip ne '127.0.0.1' 7161: && !defined(&Apache::lonnet::get_hosts_from_ip($childip))) { 7162: logthis(' UpdateHosts killing child ' 7163: ." $child for ip $childip "); 7164: kill('INT', $child); 7165: } else { 7166: $active{$child} = $childip; 7167: logthis(' keeping child for ip ' 7168: ." $childip (pid=$child) "); 7169: } 7170: } 7171: 7172: my %oldconf = %secureconf; 7173: my %connchange; 7174: if (lonssl::Read_Connect_Config(\%secureconf,\%perlvar,\%crlchecked) eq 'ok') { 7175: logthis(' Reloaded SSL connection rules and cleared CRL checking history '); 7176: } else { 7177: logthis(' Failed to reload SSL connection rules and clear CRL checking history '); 7178: } 7179: if ((ref($oldconf{'connfrom'}) eq 'HASH') && (ref($secureconf{'connfrom'}) eq 'HASH')) { 7180: foreach my $type ('dom','intdom','other') { 7181: if ((($oldconf{'connfrom'}{$type} eq 'no') && ($secureconf{'connfrom'}{$type} eq 'req')) || 7182: (($oldconf{'connfrom'}{$type} eq 'req') && ($secureconf{'connfrom'}{$type} eq 'no'))) { 7183: $connchange{$type} = 1; 7184: } 7185: } 7186: } 7187: if (keys(%connchange)) { 7188: foreach my $child (keys(%active)) { 7189: my $childip = $active{$child}; 7190: if ($childip ne '127.0.0.1') { 7191: my $childhostname = gethostbyaddr(Socket::inet_aton($childip),AF_INET); 7192: if ($childhostname ne '') { 7193: my $childlonhost = &Apache::lonnet::get_server_homeID($childhostname); 7194: my ($samedom,$sameinst) = &set_client_info($childlonhost); 7195: if ($samedom) { 7196: if ($connchange{'dom'}) { 7197: logthis(' UpdateHosts killing child ' 7198: ." $child for ip $childip "); 7199: kill('INT', $child); 7200: } 7201: } elsif ($sameinst) { 7202: if ($connchange{'intdom'}) { 7203: logthis(' UpdateHosts killing child ' 7204: ." $child for ip $childip "); 7205: kill('INT', $child); 7206: } 7207: } else { 7208: if ($connchange{'other'}) { 7209: logthis(' UpdateHosts killing child ' 7210: ." $child for ip $childip "); 7211: kill('INT', $child); 7212: } 7213: } 7214: } 7215: } 7216: } 7217: } 7218: ReloadApache; 7219: &status("Finished reloading hosts.tab"); 7220: } 7221: 7222: sub checkchildren { 7223: &status("Checking on the children (sending signals)"); 7224: &initnewstatus(); 7225: &logstatus(); 7226: &logthis('Going to check on the children'); 7227: my $docdir=$perlvar{'lonDocRoot'}; 7228: foreach (sort keys %children) { 7229: #sleep 1; 7230: unless (kill 'USR1' => $_) { 7231: &logthis ('Child '.$_.' is dead'); 7232: &logstatus($$.' is dead'); 7233: delete($children{$_}); 7234: } 7235: } 7236: sleep 5; 7237: $SIG{ALRM} = sub { Debug("timeout"); 7238: die "timeout"; }; 7239: $SIG{__DIE__} = 'DEFAULT'; 7240: &status("Checking on the children (waiting for reports)"); 7241: foreach (sort keys %children) { 7242: unless (-e "$docdir/lon-status/londchld/$_.txt") { 7243: eval { 7244: alarm(300); 7245: &logthis('Child '.$_.' did not respond'); 7246: kill 9 => $_; 7247: #$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}"; 7248: #$subj="LON: $currenthostid killed lond process $_"; 7249: #my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`; 7250: #$execdir=$perlvar{'lonDaemons'}; 7251: #$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`; 7252: delete($children{$_}); 7253: alarm(0); 7254: } 7255: } 7256: } 7257: $SIG{ALRM} = 'DEFAULT'; 7258: $SIG{__DIE__} = \&catchexception; 7259: &status("Finished checking children"); 7260: &logthis('Finished Checking children'); 7261: } 7262: 7263: # --------------------------------------------------------------------- Logging 7264: 7265: sub logthis { 7266: my $message=shift; 7267: my $execdir=$perlvar{'lonDaemons'}; 7268: my $fh=IO::File->new(">>$execdir/logs/lond.log"); 7269: my $now=time; 7270: my $local=localtime($now); 7271: $lastlog=$local.': '.$message; 7272: print $fh "$local ($$): $message\n"; 7273: } 7274: 7275: # ------------------------- Conditional log if $DEBUG true. 7276: sub Debug { 7277: my $message = shift; 7278: if($DEBUG) { 7279: &logthis($message); 7280: } 7281: } 7282: 7283: # 7284: # Sub to do replies to client.. this gives a hook for some 7285: # debug tracing too: 7286: # Parameters: 7287: # fd - File open on client. 7288: # reply - Text to send to client. 7289: # request - Original request from client. 7290: # 7291: #NOTE $reply must be terminated by exactly *one* \n. If $reply is a reference 7292: #this is done automatically ($$reply must not contain any \n in this case). 7293: #If $reply is a string the caller has to ensure this. 7294: sub Reply { 7295: my ($fd, $reply, $request) = @_; 7296: if (ref($reply)) { 7297: print $fd $$reply; 7298: print $fd "\n"; 7299: if ($DEBUG) { Debug("Request was $request Reply was $$reply"); } 7300: } else { 7301: print $fd $reply; 7302: if ($DEBUG) { Debug("Request was $request Reply was $reply"); } 7303: } 7304: $Transactions++; 7305: } 7306: 7307: 7308: # 7309: # Sub to report a failure. 7310: # This function: 7311: # - Increments the failure statistic counters. 7312: # - Invokes Reply to send the error message to the client. 7313: # Parameters: 7314: # fd - File descriptor open on the client 7315: # reply - Reply text to emit. 7316: # request - The original request message (used by Reply 7317: # to debug if that's enabled. 7318: # Implicit outputs: 7319: # $Failures- The number of failures is incremented. 7320: # Reply (invoked here) sends a message to the 7321: # client: 7322: # 7323: sub Failure { 7324: my $fd = shift; 7325: my $reply = shift; 7326: my $request = shift; 7327: 7328: $Failures++; 7329: Reply($fd, $reply, $request); # That's simple eh? 7330: } 7331: # ------------------------------------------------------------------ Log status 7332: 7333: sub logstatus { 7334: &status("Doing logging"); 7335: my $docdir=$perlvar{'lonDocRoot'}; 7336: { 7337: my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt"); 7338: print $fh $status."\n".$lastlog."\n".time."\n$keymode"; 7339: $fh->close(); 7340: } 7341: &status("Finished $$.txt"); 7342: { 7343: open(LOG,">>$docdir/lon-status/londstatus.txt"); 7344: flock(LOG,LOCK_EX); 7345: print LOG $$."\t".$clientname."\t".$currenthostid."\t" 7346: .$status."\t".$lastlog."\t $keymode\n"; 7347: flock(LOG,LOCK_UN); 7348: close(LOG); 7349: } 7350: &status("Finished logging"); 7351: } 7352: 7353: sub initnewstatus { 7354: my $docdir=$perlvar{'lonDocRoot'}; 7355: my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt"); 7356: my $now=time(); 7357: my $local=localtime($now); 7358: print $fh "LOND status $local - parent $$\n\n"; 7359: opendir(DIR,"$docdir/lon-status/londchld"); 7360: while (my $filename=readdir(DIR)) { 7361: unlink("$docdir/lon-status/londchld/$filename"); 7362: } 7363: closedir(DIR); 7364: } 7365: 7366: # -------------------------------------------------------------- Status setting 7367: 7368: sub status { 7369: my $what=shift; 7370: my $now=time; 7371: my $local=localtime($now); 7372: $status=$local.': '.$what; 7373: $0='lond: '.$what.' '.$local; 7374: } 7375: 7376: # -------------------------------------------------------------- Talk to lonsql 7377: 7378: sub sql_reply { 7379: my ($cmd)=@_; 7380: my $answer=&sub_sql_reply($cmd); 7381: if ($answer eq 'con_lost') { $answer=&sub_sql_reply($cmd); } 7382: return $answer; 7383: } 7384: 7385: sub sub_sql_reply { 7386: my ($cmd)=@_; 7387: my $unixsock="mysqlsock"; 7388: my $peerfile="$perlvar{'lonSockDir'}/$unixsock"; 7389: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile", 7390: Type => SOCK_STREAM, 7391: Timeout => 10) 7392: or return "con_lost"; 7393: print $sclient "$cmd:$currentdomainid\n"; 7394: my $answer=<$sclient>; 7395: chomp($answer); 7396: if (!$answer) { $answer="con_lost"; } 7397: return $answer; 7398: } 7399: 7400: # --------------------------------------- Is this the home server of an author? 7401: 7402: sub ishome { 7403: my $author=shift; 7404: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/; 7405: my ($udom,$uname)=split(/\//,$author); 7406: my $proname=propath($udom,$uname); 7407: if (-e $proname) { 7408: return 'owner'; 7409: } else { 7410: return 'not_owner'; 7411: } 7412: } 7413: 7414: # ======================================================= Continue main program 7415: # ---------------------------------------------------- Fork once and dissociate 7416: 7417: my $fpid=fork; 7418: exit if $fpid; 7419: die "Couldn't fork: $!" unless defined ($fpid); 7420: 7421: POSIX::setsid() or die "Can't start new session: $!"; 7422: 7423: # ------------------------------------------------------- Write our PID on disk 7424: 7425: my $execdir=$perlvar{'lonDaemons'}; 7426: open (PIDSAVE,">$execdir/logs/lond.pid"); 7427: print PIDSAVE "$$\n"; 7428: close(PIDSAVE); 7429: &logthis("CRITICAL: ---------- Starting ----------"); 7430: &status('Starting'); 7431: 7432: 7433: 7434: # ----------------------------------------------------- Install signal handlers 7435: 7436: 7437: $SIG{CHLD} = \&REAPER; 7438: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN; 7439: $SIG{HUP} = \&HUPSMAN; 7440: $SIG{USR1} = \&checkchildren; 7441: $SIG{USR2} = \&UpdateHosts; 7442: 7443: # Read the host hashes: 7444: &Apache::lonnet::load_hosts_tab(); 7445: my %iphost = &Apache::lonnet::get_iphost(1); 7446: 7447: $dist=`$perlvar{'lonDaemons'}/distprobe`; 7448: 7449: my $arch = `uname -i`; 7450: chomp($arch); 7451: if ($arch eq 'unknown') { 7452: $arch = `uname -m`; 7453: chomp($arch); 7454: } 7455: 7456: unless (lonssl::Read_Connect_Config(\%secureconf,\%perlvar,\%crlchecked) eq 'ok') { 7457: &logthis('No connectionrules table. Will fallback to loncapa.conf'); 7458: } 7459: 7460: # -------------------------------------------------------------- 7461: # Accept connections. When a connection comes in, it is validated 7462: # and if good, a child process is created to process transactions 7463: # along the connection. 7464: 7465: while (1) { 7466: &status('Starting accept'); 7467: $client = $server->accept() or next; 7468: &status('Accepted '.$client.' off to spawn'); 7469: make_new_child($client); 7470: &status('Finished spawning'); 7471: } 7472: 7473: sub make_new_child { 7474: my $pid; 7475: # my $cipher; # Now global 7476: my $sigset; 7477: 7478: $client = shift; 7479: &status('Starting new child '.$client); 7480: &logthis(' Attempting to start child ('.$client. 7481: ")"); 7482: # block signal for fork 7483: $sigset = POSIX::SigSet->new(SIGINT); 7484: sigprocmask(SIG_BLOCK, $sigset) 7485: or die "Can't block SIGINT for fork: $!\n"; 7486: 7487: die "fork: $!" unless defined ($pid = fork); 7488: 7489: $client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of 7490: # connection liveness. 7491: 7492: # 7493: # Figure out who we're talking to so we can record the peer in 7494: # the pid hash. 7495: # 7496: my $caller = getpeername($client); 7497: my ($port,$iaddr); 7498: if (defined($caller) && length($caller) > 0) { 7499: ($port,$iaddr)=unpack_sockaddr_in($caller); 7500: } else { 7501: &logthis("Unable to determine who caller was, getpeername returned nothing"); 7502: } 7503: if (defined($iaddr)) { 7504: $clientip = inet_ntoa($iaddr); 7505: Debug("Connected with $clientip"); 7506: } else { 7507: &logthis("Unable to determine clientip"); 7508: $clientip='Unavailable'; 7509: } 7510: 7511: if ($pid) { 7512: # Parent records the child's birth and returns. 7513: sigprocmask(SIG_UNBLOCK, $sigset) 7514: or die "Can't unblock SIGINT for fork: $!\n"; 7515: $children{$pid} = $clientip; 7516: &status('Started child '.$pid); 7517: close($client); 7518: return; 7519: } else { 7520: # Child can *not* return from this subroutine. 7521: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before 7522: $SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns 7523: #don't get intercepted 7524: $SIG{USR1}= \&logstatus; 7525: $SIG{ALRM}= \&timeout; 7526: # 7527: # Block sigpipe as it gets thrownon socket disconnect and we want to 7528: # deal with that as a read faiure instead. 7529: # 7530: my $blockset = POSIX::SigSet->new(SIGPIPE); 7531: sigprocmask(SIG_BLOCK, $blockset); 7532: 7533: $lastlog='Forked '; 7534: $status='Forked'; 7535: 7536: # unblock signals 7537: sigprocmask(SIG_UNBLOCK, $sigset) 7538: or die "Can't unblock SIGINT for fork: $!\n"; 7539: 7540: # my $tmpsnum=0; # Now global 7541: #---------------------------------------------------- kerberos 5 initialization 7542: &Authen::Krb5::init_context(); 7543: 7544: my $no_ets; 7545: if ($dist =~ /^(?:centos|rhes|scientific)(\d+)$/) { 7546: if ($1 >= 7) { 7547: $no_ets = 1; 7548: } 7549: } elsif ($dist =~ /^suse(\d+\.\d+)$/) { 7550: if (($1 eq '9.3') || ($1 >= 12.2)) { 7551: $no_ets = 1; 7552: } 7553: } elsif ($dist =~ /^sles(\d+)$/) { 7554: if ($1 > 11) { 7555: $no_ets = 1; 7556: } 7557: } elsif ($dist =~ /^fedora(\d+)$/) { 7558: if ($1 < 7) { 7559: $no_ets = 1; 7560: } 7561: } 7562: unless ($no_ets) { 7563: &Authen::Krb5::init_ets(); 7564: } 7565: 7566: &status('Accepted connection'); 7567: # ============================================================================= 7568: # do something with the connection 7569: # ----------------------------------------------------------------------------- 7570: # see if we know client and 'check' for spoof IP by ineffective challenge 7571: 7572: my $outsideip=$clientip; 7573: if ($clientip eq '127.0.0.1') { 7574: $outsideip=&Apache::lonnet::get_host_ip($perlvar{'lonHostID'}); 7575: } 7576: &ReadManagerTable(); 7577: my $clientrec=defined(&Apache::lonnet::get_hosts_from_ip($outsideip)); 7578: my $ismanager=($managers{$outsideip} ne undef); 7579: $clientname = "[unknown]"; 7580: if($clientrec) { # Establish client type. 7581: $ConnectionType = "client"; 7582: $clientname = (&Apache::lonnet::get_hosts_from_ip($outsideip))[-1]; 7583: if($ismanager) { 7584: $ConnectionType = "both"; 7585: } 7586: } else { 7587: $ConnectionType = "manager"; 7588: $clientname = $managers{$outsideip}; 7589: } 7590: my $clientok; 7591: 7592: if ($clientrec || $ismanager) { 7593: &status("Waiting for init from $clientip $clientname"); 7594: &logthis('INFO: Connection, '. 7595: $clientip. 7596: " ($clientname) connection type = $ConnectionType " ); 7597: &status("Connecting $clientip ($clientname))"); 7598: my $remotereq=<$client>; 7599: chomp($remotereq); 7600: Debug("Got init: $remotereq"); 7601: 7602: if ($remotereq =~ /^init/) { 7603: &sethost("sethost:$perlvar{'lonHostID'}"); 7604: # 7605: # If the remote is attempting a local init... give that a try: 7606: # 7607: (my $i, my $inittype, $clientversion) = split(/:/, $remotereq); 7608: # For LON-CAPA 2.9, the client session will have sent its LON-CAPA 7609: # version when initiating the connection. For LON-CAPA 2.8 and older, 7610: # the version is retrieved from the global %loncaparevs in lonnet.pm. 7611: # $clientversion contains path to keyfile if $inittype eq 'local' 7612: # it's overridden below in this case 7613: $clientversion ||= $Apache::lonnet::loncaparevs{$clientname}; 7614: 7615: # If the connection type is ssl, but I didn't get my 7616: # certificate files yet, then I'll drop back to 7617: # insecure (if allowed). 7618: 7619: if ($inittype eq "ssl") { 7620: my $context; 7621: if ($clientsamedom) { 7622: $context = 'dom'; 7623: if ($secureconf{'connfrom'}{'dom'} eq 'no') { 7624: $inittype = ""; 7625: } 7626: } elsif ($clientsameinst) { 7627: $context = 'intdom'; 7628: if ($secureconf{'connfrom'}{'intdom'} eq 'no') { 7629: $inittype = ""; 7630: } 7631: } else { 7632: $context = 'other'; 7633: if ($secureconf{'connfrom'}{'other'} eq 'no') { 7634: $inittype = ""; 7635: } 7636: } 7637: if ($inittype eq '') { 7638: &logthis(" Domain config set " 7639: ."to no ssl for $clientname (context: $context)" 7640: ." -- trying insecure auth"); 7641: } 7642: } 7643: 7644: if($inittype eq "ssl") { 7645: my ($ca, $cert) = lonssl::CertificateFile; 7646: my $kfile = lonssl::KeyFile; 7647: if((!$ca) || 7648: (!$cert) || 7649: (!$kfile)) { 7650: $inittype = ""; # This forces insecure attempt. 7651: &logthis(" Certificates not " 7652: ."installed -- trying insecure auth"); 7653: } else { # SSL certificates are in place so 7654: } # Leave the inittype alone. 7655: } 7656: 7657: if($inittype eq "local") { 7658: $clientversion = $perlvar{'lonVersion'}; 7659: my $key = LocalConnection($client, $remotereq); 7660: if($key) { 7661: Debug("Got local key $key"); 7662: $clientok = 1; 7663: my $cipherkey = pack("H32", $key); 7664: $cipher = new IDEA($cipherkey); 7665: print $client "ok:local\n"; 7666: &logthis('' 7667: . "Successful local authentication "); 7668: $keymode = "local" 7669: } else { 7670: Debug("Failed to get local key"); 7671: $clientok = 0; 7672: shutdown($client, 3); 7673: close $client; 7674: } 7675: } elsif ($inittype eq "ssl") { 7676: my $key = SSLConnection($client,$clientname); 7677: if ($key) { 7678: $clientok = 1; 7679: my $cipherkey = pack("H32", $key); 7680: $cipher = new IDEA($cipherkey); 7681: &logthis('' 7682: ."Successfull ssl authentication with $clientname "); 7683: $keymode = "ssl"; 7684: 7685: } else { 7686: $clientok = 0; 7687: close $client; 7688: } 7689: 7690: } else { 7691: my $ok = InsecureConnection($client); 7692: if($ok) { 7693: $clientok = 1; 7694: &logthis('' 7695: ."Successful insecure authentication with $clientname "); 7696: print $client "ok\n"; 7697: $keymode = "insecure"; 7698: } else { 7699: &logthis('' 7700: ."Attempted insecure connection disallowed "); 7701: close $client; 7702: $clientok = 0; 7703: } 7704: } 7705: } else { 7706: &logthis( 7707: "WARNING: " 7708: ."$clientip failed to initialize: >$remotereq< "); 7709: &status('No init '.$clientip); 7710: } 7711: } else { 7712: &logthis( 7713: "WARNING: Unknown client $clientip"); 7714: &status('Hung up on '.$clientip); 7715: } 7716: 7717: if ($clientok) { 7718: # ---------------- New known client connecting, could mean machine online again 7719: if (&Apache::lonnet::get_host_ip($currenthostid) ne $clientip 7720: && $clientip ne '127.0.0.1') { 7721: &Apache::lonnet::reconlonc($clientname); 7722: } 7723: &logthis("Established connection: $clientname"); 7724: &status('Will listen to '.$clientname); 7725: # ------------------------------------------------------------ Process requests 7726: my $keep_going = 1; 7727: my $user_input; 7728: 7729: while(($user_input = get_request) && $keep_going) { 7730: alarm(120); 7731: Debug("Main: Got $user_input\n"); 7732: $keep_going = &process_request($user_input); 7733: alarm(0); 7734: &status('Listening to '.$clientname." ($keymode)"); 7735: } 7736: 7737: # --------------------------------------------- client unknown or fishy, refuse 7738: } else { 7739: print $client "refused\n"; 7740: $client->close(); 7741: &logthis("WARNING: " 7742: ."Rejected client $clientip, closing connection"); 7743: } 7744: } 7745: 7746: # ============================================================================= 7747: 7748: &logthis("CRITICAL: " 7749: ."Disconnect from $clientip ($clientname)"); 7750: 7751: 7752: # this exit is VERY important, otherwise the child will become 7753: # a producer of more and more children, forking yourself into 7754: # process death. 7755: exit; 7756: 7757: } 7758: 7759: # 7760: # Used to determine if a particular client is from the same domain 7761: # as the current server, or from the same internet domain, and 7762: # also if the client can host sessions for the domain's users. 7763: # A hash is populated with keys set to commands sent by the client 7764: # which may not be executed for this domain. 7765: # 7766: # Optional input -- the client to check for domain and internet domain. 7767: # If not specified, defaults to the package variable: $clientname 7768: # 7769: # If called in array context will not set package variables, but will 7770: # instead return an array of two values - (a) true if client is in the 7771: # same domain as the server, and (b) true if client is in the same 7772: # internet domain. 7773: # 7774: # If called in scalar context, sets package variables for current client: 7775: # 7776: # $clienthomedom - LonCAPA domain of homeID for client. 7777: # $clientsamedom - LonCAPA domain same for this host and client. 7778: # $clientintdom - LonCAPA "internet domain" for client. 7779: # $clientsameinst - LonCAPA "internet domain" same for this host & client. 7780: # $clientremoteok - If current domain permits hosting on this client: 1 7781: # %clientprohibited - Commands prohibited for domain's users for this client. 7782: # 7783: # if the host and client have the same "internet domain", then the value 7784: # of $clientremoteok is not used, and no commands are prohibited. 7785: # 7786: # returns 1 to indicate package variables have been set for current client. 7787: # 7788: 7789: sub set_client_info { 7790: my ($lonhost) = @_; 7791: $lonhost ||= $clientname; 7792: my $clienthost = &Apache::lonnet::hostname($lonhost); 7793: my $clientserverhomeID = &Apache::lonnet::get_server_homeID($clienthost); 7794: my $homedom = &Apache::lonnet::host_domain($clientserverhomeID); 7795: my $samedom = 0; 7796: if ($perlvar{'lonDefDomain'} eq $homedom) { 7797: $samedom = 1; 7798: } 7799: my $intdom = &Apache::lonnet::internet_dom($clientserverhomeID); 7800: my $sameinst = 0; 7801: if ($intdom ne '') { 7802: my $internet_names = &Apache::lonnet::get_internet_names($currenthostid); 7803: if (ref($internet_names) eq 'ARRAY') { 7804: if (grep(/^\Q$intdom\E$/,@{$internet_names})) { 7805: $sameinst = 1; 7806: } 7807: } 7808: } 7809: if (wantarray) { 7810: return ($samedom,$sameinst); 7811: } else { 7812: $clienthomedom = $homedom; 7813: $clientsamedom = $samedom; 7814: $clientintdom = $intdom; 7815: $clientsameinst = $sameinst; 7816: if ($clientsameinst) { 7817: undef($clientremoteok); 7818: undef(%clientprohibited); 7819: } else { 7820: $clientremoteok = &get_remote_hostable($currentdomainid); 7821: %clientprohibited = &get_prohibited($currentdomainid); 7822: } 7823: return 1; 7824: } 7825: } 7826: 7827: # 7828: # Determine if a user is an author for the indicated domain. 7829: # 7830: # Parameters: 7831: # domain - domain to check in . 7832: # user - Name of user to check. 7833: # 7834: # Return: 7835: # 1 - User is an author for domain. 7836: # 0 - User is not an author for domain. 7837: sub is_author { 7838: my ($domain, $user) = @_; 7839: 7840: &Debug("is_author: $user @ $domain"); 7841: 7842: my $hashref = &tie_user_hash($domain, $user, "roles", 7843: &GDBM_READER()); 7844: 7845: # Author role should show up as a key /domain/_au 7846: 7847: my $value; 7848: if ($hashref) { 7849: 7850: my $key = "/$domain/_au"; 7851: if (defined($hashref)) { 7852: $value = $hashref->{$key}; 7853: if(!untie_user_hash($hashref)) { 7854: return 'error: ' . ($!+0)." untie (GDBM) Failed"; 7855: } 7856: } 7857: 7858: if(defined($value)) { 7859: &Debug("$user @ $domain is an author"); 7860: } 7861: } else { 7862: return 'error: '.($!+0)." tie (GDBM) Failed"; 7863: } 7864: 7865: return defined($value); 7866: } 7867: # 7868: # Checks to see if the input roleput request was to set 7869: # an author role. If so, creates construction space 7870: # Parameters: 7871: # request - The request sent to the rolesput subchunk. 7872: # We're looking for /domain/_au 7873: # domain - The domain in which the user is having roles doctored. 7874: # user - Name of the user for which the role is being put. 7875: # authtype - The authentication type associated with the user. 7876: # 7877: sub manage_permissions { 7878: my ($request, $domain, $user, $authtype) = @_; 7879: # See if the request is of the form /$domain/_au 7880: if($request =~ /^(\/\Q$domain\E\/_au)$/) { # It's an author rolesput... 7881: my $path=$perlvar{'lonDocRoot'}."/priv/$domain"; 7882: unless (-e $path) { 7883: mkdir($path); 7884: } 7885: unless (-e $path.'/'.$user) { 7886: mkdir($path.'/'.$user); 7887: } 7888: } 7889: } 7890: 7891: 7892: # 7893: # Return the full path of a user password file, whether it exists or not. 7894: # Parameters: 7895: # domain - Domain in which the password file lives. 7896: # user - name of the user. 7897: # Returns: 7898: # Full passwd path: 7899: # 7900: sub password_path { 7901: my ($domain, $user) = @_; 7902: return &propath($domain, $user).'/passwd'; 7903: } 7904: 7905: # Password Filename 7906: # Returns the path to a passwd file given domain and user... only if 7907: # it exists. 7908: # Parameters: 7909: # domain - Domain in which to search. 7910: # user - username. 7911: # Returns: 7912: # - If the password file exists returns its path. 7913: # - If the password file does not exist, returns undefined. 7914: # 7915: sub password_filename { 7916: my ($domain, $user) = @_; 7917: 7918: Debug ("PasswordFilename called: dom = $domain user = $user"); 7919: 7920: my $path = &password_path($domain, $user); 7921: Debug("PasswordFilename got path: $path"); 7922: if(-e $path) { 7923: return $path; 7924: } else { 7925: return undef; 7926: } 7927: } 7928: 7929: # 7930: # Rewrite the contents of the user's passwd file. 7931: # Parameters: 7932: # domain - domain of the user. 7933: # name - User's name. 7934: # contents - New contents of the file. 7935: # saveold - (optional). If true save old file in a passwd.bak file. 7936: # Returns: 7937: # 0 - Failed. 7938: # 1 - Success. 7939: # 7940: sub rewrite_password_file { 7941: my ($domain, $user, $contents, $saveold) = @_; 7942: 7943: my $file = &password_filename($domain, $user); 7944: if (defined $file) { 7945: if ($saveold) { 7946: my $bakfile = $file.'.bak'; 7947: if (CopyFile($file,$bakfile)) { 7948: chmod(0400,$bakfile); 7949: &logthis("Old password saved in passwd.bak for internally authenticated user: $user:$domain"); 7950: } else { 7951: &logthis("Failed to save old password in passwd.bak for internally authenticated user: $user:$domain"); 7952: } 7953: } 7954: my $pf = IO::File->new(">$file"); 7955: if($pf) { 7956: print $pf "$contents\n"; 7957: return 1; 7958: } else { 7959: return 0; 7960: } 7961: } else { 7962: return 0; 7963: } 7964: 7965: } 7966: 7967: # 7968: # get_auth_type - Determines the authorization type of a user in a domain. 7969: 7970: # Returns the authorization type or nouser if there is no such user. 7971: # 7972: sub get_auth_type { 7973: my ($domain, $user) = @_; 7974: 7975: Debug("get_auth_type( $domain, $user ) \n"); 7976: my $proname = &propath($domain, $user); 7977: my $passwdfile = "$proname/passwd"; 7978: if( -e $passwdfile ) { 7979: my $pf = IO::File->new($passwdfile); 7980: my $realpassword = <$pf>; 7981: chomp($realpassword); 7982: Debug("Password info = $realpassword\n"); 7983: my ($authtype, $contentpwd) = split(/:/, $realpassword); 7984: Debug("Authtype = $authtype, content = $contentpwd\n"); 7985: return "$authtype:$contentpwd"; 7986: } else { 7987: Debug("Returning nouser"); 7988: return "nouser"; 7989: } 7990: } 7991: 7992: # 7993: # Validate a user given their domain, name and password. This utility 7994: # function is used by both AuthenticateHandler and ChangePasswordHandler 7995: # to validate the login credentials of a user. 7996: # Parameters: 7997: # $domain - The domain being logged into (this is required due to 7998: # the capability for multihomed systems. 7999: # $user - The name of the user being validated. 8000: # $password - The user's propoposed password. 8001: # 8002: # Returns: 8003: # 1 - The domain,user,pasword triplet corresponds to a valid 8004: # user. 8005: # 0 - The domain,user,password triplet is not a valid user. 8006: # 8007: sub validate_user { 8008: my ($domain, $user, $password, $checkdefauth) = @_; 8009: 8010: # Why negative ~pi you may well ask? Well this function is about 8011: # authentication, and therefore very important to get right. 8012: # I've initialized the flag that determines whether or not I've 8013: # validated correctly to a value it's not supposed to get. 8014: # At the end of this function. I'll ensure that it's not still that 8015: # value so we don't just wind up returning some accidental value 8016: # as a result of executing an unforseen code path that 8017: # did not set $validated. At the end of valid execution paths, 8018: # validated shoule be 1 for success or 0 for failuer. 8019: 8020: my $validated = -3.14159; 8021: 8022: # How we authenticate is determined by the type of authentication 8023: # the user has been assigned. If the authentication type is 8024: # "nouser", the user does not exist so we will return 0. 8025: 8026: my $contents = &get_auth_type($domain, $user); 8027: my ($howpwd, $contentpwd) = split(/:/, $contents); 8028: 8029: my $null = pack("C",0); # Used by kerberos auth types. 8030: 8031: if ($howpwd eq 'nouser') { 8032: if ($checkdefauth) { 8033: my %domdefaults = &Apache::lonnet::get_domain_defaults($domain); 8034: if ($domdefaults{'auth_def'} eq 'localauth') { 8035: $howpwd = $domdefaults{'auth_def'}; 8036: $contentpwd = $domdefaults{'auth_arg_def'}; 8037: } elsif ((($domdefaults{'auth_def'} eq 'krb4') || 8038: ($domdefaults{'auth_def'} eq 'krb5')) && 8039: ($domdefaults{'auth_arg_def'} ne '')) { 8040: $howpwd = $domdefaults{'auth_def'}; 8041: $contentpwd = $domdefaults{'auth_arg_def'}; 8042: } 8043: } 8044: } 8045: if ($howpwd ne 'nouser') { 8046: if($howpwd eq "internal") { # Encrypted is in local password file. 8047: if (length($contentpwd) == 13) { 8048: $validated = (crypt($password,$contentpwd) eq $contentpwd); 8049: if ($validated) { 8050: my %domdefaults = &Apache::lonnet::get_domain_defaults($domain); 8051: if ($domdefaults{'intauth_switch'}) { 8052: my $ncpass = &hash_passwd($domain,$password); 8053: my $saveold; 8054: if ($domdefaults{'intauth_switch'} == 2) { 8055: $saveold = 1; 8056: } 8057: if (&rewrite_password_file($domain,$user,"$howpwd:$ncpass",$saveold)) { 8058: &update_passwd_history($user,$domain,$howpwd,'conversion'); 8059: &logthis("Validated password hashed with bcrypt for $user:$domain"); 8060: } 8061: } 8062: } 8063: } else { 8064: $validated = &check_internal_passwd($password,$contentpwd,$domain,$user); 8065: } 8066: } 8067: elsif ($howpwd eq "unix") { # User is a normal unix user. 8068: $contentpwd = (getpwnam($user))[1]; 8069: if($contentpwd) { 8070: if($contentpwd eq 'x') { # Shadow password file... 8071: my $pwauth_path = "/usr/local/sbin/pwauth"; 8072: open PWAUTH, "|$pwauth_path" or 8073: die "Cannot invoke authentication"; 8074: print PWAUTH "$user\n$password\n"; 8075: close PWAUTH; 8076: $validated = ! $?; 8077: 8078: } else { # Passwords in /etc/passwd. 8079: $validated = (crypt($password, 8080: $contentpwd) eq $contentpwd); 8081: } 8082: } else { 8083: $validated = 0; 8084: } 8085: } elsif ($howpwd eq "krb4") { # user is in kerberos 4 auth. domain. 8086: my $checkwithkrb5 = 0; 8087: if ($dist =~/^fedora(\d+)$/) { 8088: if ($1 > 11) { 8089: $checkwithkrb5 = 1; 8090: } 8091: } elsif ($dist =~ /^suse([\d.]+)$/) { 8092: if ($1 > 11.1) { 8093: $checkwithkrb5 = 1; 8094: } 8095: } 8096: if ($checkwithkrb5) { 8097: $validated = &krb5_authen($password,$null,$user,$contentpwd); 8098: } else { 8099: $validated = &krb4_authen($password,$null,$user,$contentpwd); 8100: } 8101: } elsif ($howpwd eq "krb5") { # User is in kerberos 5 auth. domain. 8102: $validated = &krb5_authen($password,$null,$user,$contentpwd); 8103: } elsif ($howpwd eq "localauth") { 8104: # Authenticate via installation specific authentcation method: 8105: $validated = &localauth::localauth($user, 8106: $password, 8107: $contentpwd, 8108: $domain); 8109: if ($validated < 0) { 8110: &logthis("localauth for $contentpwd $user:$domain returned a $validated"); 8111: $validated = 0; 8112: } 8113: } else { # Unrecognized auth is also bad. 8114: $validated = 0; 8115: } 8116: } else { 8117: $validated = 0; 8118: } 8119: # 8120: # $validated has the correct stat of the authentication: 8121: # 8122: 8123: unless ($validated != -3.14159) { 8124: # I >really really< want to know if this happens. 8125: # since it indicates that user authentication is badly 8126: # broken in some code path. 8127: # 8128: die "ValidateUser - failed to set the value of validated $domain, $user $password"; 8129: } 8130: return $validated; 8131: } 8132: 8133: sub check_internal_passwd { 8134: my ($plainpass,$stored,$domain,$user) = @_; 8135: my (undef,$method,@rest) = split(/!/,$stored); 8136: if ($method eq 'bcrypt') { 8137: my $result = &hash_passwd($domain,$plainpass,@rest); 8138: if ($result ne $stored) { 8139: return 0; 8140: } 8141: my %domdefaults = &Apache::lonnet::get_domain_defaults($domain); 8142: if ($domdefaults{'intauth_check'}) { 8143: # Upgrade to a larger number of rounds if necessary 8144: my $defaultcost = $domdefaults{'intauth_cost'}; 8145: if (($defaultcost eq '') || ($defaultcost =~ /D/)) { 8146: $defaultcost = 10; 8147: } 8148: if (int($rest[0])<int($defaultcost)) { 8149: if ($domdefaults{'intauth_check'} == 1) { 8150: my $ncpass = &hash_passwd($domain,$plainpass); 8151: if (&rewrite_password_file($domain,$user,"internal:$ncpass")) { 8152: &update_passwd_history($user,$domain,'internal','update cost'); 8153: &logthis("Validated password hashed with bcrypt for $user:$domain"); 8154: } 8155: return 1; 8156: } elsif ($domdefaults{'intauth_check'} == 2) { 8157: return 0; 8158: } 8159: } 8160: } else { 8161: return 1; 8162: } 8163: } 8164: return 0; 8165: } 8166: 8167: sub get_last_authchg { 8168: my ($domain,$user) = @_; 8169: my $lastmod; 8170: my $logname = &propath($domain,$user).'/passwd.log'; 8171: if (-e "$logname") { 8172: $lastmod = (stat("$logname"))[9]; 8173: } 8174: return $lastmod; 8175: } 8176: 8177: sub krb4_authen { 8178: my ($password,$null,$user,$contentpwd) = @_; 8179: my $validated = 0; 8180: if (!($password =~ /$null/) ) { # Null password not allowed. 8181: eval { 8182: require Authen::Krb4; 8183: }; 8184: if (!$@) { 8185: my $k4error = &Authen::Krb4::get_pw_in_tkt($user, 8186: "", 8187: $contentpwd,, 8188: 'krbtgt', 8189: $contentpwd, 8190: 1, 8191: $password); 8192: if(!$k4error) { 8193: $validated = 1; 8194: } else { 8195: $validated = 0; 8196: &logthis('krb4: '.$user.', '.$contentpwd.', '. 8197: &Authen::Krb4::get_err_txt($Authen::Krb4::error)); 8198: } 8199: } else { 8200: $validated = krb5_authen($password,$null,$user,$contentpwd); 8201: } 8202: } 8203: return $validated; 8204: } 8205: 8206: sub krb5_authen { 8207: my ($password,$null,$user,$contentpwd) = @_; 8208: my $validated = 0; 8209: if(!($password =~ /$null/)) { # Null password not allowed. 8210: my $krbclient = &Authen::Krb5::parse_name($user.'@' 8211: .$contentpwd); 8212: my $krbservice = "krbtgt/".$contentpwd."\@".$contentpwd; 8213: my $krbserver = &Authen::Krb5::parse_name($krbservice); 8214: my $credentials= &Authen::Krb5::cc_default(); 8215: $credentials->initialize(&Authen::Krb5::parse_name($user.'@' 8216: .$contentpwd)); 8217: my $krbreturn; 8218: if (exists(&Authen::Krb5::get_init_creds_password)) { 8219: $krbreturn = 8220: &Authen::Krb5::get_init_creds_password($krbclient,$password, 8221: $krbservice); 8222: $validated = (ref($krbreturn) eq 'Authen::Krb5::Creds'); 8223: } else { 8224: $krbreturn = 8225: &Authen::Krb5::get_in_tkt_with_password($krbclient,$krbserver, 8226: $password,$credentials); 8227: $validated = ($krbreturn == 1); 8228: } 8229: if (!$validated) { 8230: &logthis('krb5: '.$user.', '.$contentpwd.', '. 8231: &Authen::Krb5::error()); 8232: } 8233: } 8234: return $validated; 8235: } 8236: 8237: sub addline { 8238: my ($fname,$hostid,$ip,$newline)=@_; 8239: my $contents; 8240: my $found=0; 8241: my $expr='^'.quotemeta($hostid).':'.quotemeta($ip).':'; 8242: my $sh; 8243: if ($sh=IO::File->new("$fname.subscription")) { 8244: while (my $subline=<$sh>) { 8245: if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;} 8246: } 8247: $sh->close(); 8248: } 8249: $sh=IO::File->new(">$fname.subscription"); 8250: if ($contents) { print $sh $contents; } 8251: if ($newline) { print $sh $newline; } 8252: $sh->close(); 8253: return $found; 8254: } 8255: 8256: sub get_chat { 8257: my ($cdom,$cname,$udom,$uname,$group)=@_; 8258: 8259: my @entries=(); 8260: my $namespace = 'nohist_chatroom'; 8261: my $namespace_inroom = 'nohist_inchatroom'; 8262: if ($group ne '') { 8263: $namespace .= '_'.$group; 8264: $namespace_inroom .= '_'.$group; 8265: } 8266: my $hashref = &tie_user_hash($cdom, $cname, $namespace, 8267: &GDBM_READER()); 8268: if ($hashref) { 8269: @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref)); 8270: &untie_user_hash($hashref); 8271: } 8272: my @participants=(); 8273: my $cutoff=time-60; 8274: $hashref = &tie_user_hash($cdom, $cname, $namespace_inroom, 8275: &GDBM_WRCREAT()); 8276: if ($hashref) { 8277: $hashref->{$uname.':'.$udom}=time; 8278: foreach my $user (sort(keys(%$hashref))) { 8279: if ($hashref->{$user}>$cutoff) { 8280: push(@participants, 'active_participant:'.$user); 8281: } 8282: } 8283: &untie_user_hash($hashref); 8284: } 8285: return (@participants,@entries); 8286: } 8287: 8288: sub chat_add { 8289: my ($cdom,$cname,$newchat,$group)=@_; 8290: my @entries=(); 8291: my $time=time; 8292: my $namespace = 'nohist_chatroom'; 8293: my $logfile = 'chatroom.log'; 8294: if ($group ne '') { 8295: $namespace .= '_'.$group; 8296: $logfile = 'chatroom_'.$group.'.log'; 8297: } 8298: my $hashref = &tie_user_hash($cdom, $cname, $namespace, 8299: &GDBM_WRCREAT()); 8300: if ($hashref) { 8301: @entries=map { $_.':'.$hashref->{$_} } sort(keys(%$hashref)); 8302: my ($lastid)=($entries[$#entries]=~/^(\w+)\:/); 8303: my ($thentime,$idnum)=split(/\_/,$lastid); 8304: my $newid=$time.'_000000'; 8305: if ($thentime==$time) { 8306: $idnum=~s/^0+//; 8307: $idnum++; 8308: $idnum=substr('000000'.$idnum,-6,6); 8309: $newid=$time.'_'.$idnum; 8310: } 8311: $hashref->{$newid}=$newchat; 8312: my $expired=$time-3600; 8313: foreach my $comment (keys(%$hashref)) { 8314: my ($thistime) = ($comment=~/(\d+)\_/); 8315: if ($thistime<$expired) { 8316: delete $hashref->{$comment}; 8317: } 8318: } 8319: { 8320: my $proname=&propath($cdom,$cname); 8321: if (open(CHATLOG,">>$proname/$logfile")) { 8322: print CHATLOG ("$time:".&unescape($newchat)."\n"); 8323: } 8324: close(CHATLOG); 8325: } 8326: &untie_user_hash($hashref); 8327: } 8328: } 8329: 8330: sub unsub { 8331: my ($fname,$clientip)=@_; 8332: my $result; 8333: my $unsubs = 0; # Number of successful unsubscribes: 8334: 8335: 8336: # An old way subscriptions were handled was to have a 8337: # subscription marker file: 8338: 8339: Debug("Attempting unlink of $fname.$clientname"); 8340: if (unlink("$fname.$clientname")) { 8341: $unsubs++; # Successful unsub via marker file. 8342: } 8343: 8344: # The more modern way to do it is to have a subscription list 8345: # file: 8346: 8347: if (-e "$fname.subscription") { 8348: my $found=&addline($fname,$clientname,$clientip,''); 8349: if ($found) { 8350: $unsubs++; 8351: } 8352: } 8353: 8354: # If either or both of these mechanisms succeeded in unsubscribing a 8355: # resource we can return ok: 8356: 8357: if($unsubs) { 8358: $result = "ok\n"; 8359: } else { 8360: $result = "not_subscribed\n"; 8361: } 8362: 8363: return $result; 8364: } 8365: 8366: sub currentversion { 8367: my $fname=shift; 8368: my $version=-1; 8369: my $ulsdir=''; 8370: if ($fname=~/^(.+)\/[^\/]+$/) { 8371: $ulsdir=$1; 8372: } 8373: my ($fnamere1,$fnamere2); 8374: # remove version if already specified 8375: $fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/; 8376: # get the bits that go before and after the version number 8377: if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) { 8378: $fnamere1=$1; 8379: $fnamere2='.'.$2; 8380: } 8381: if (-e $fname) { $version=1; } 8382: if (-e $ulsdir) { 8383: if(-d $ulsdir) { 8384: if (opendir(LSDIR,$ulsdir)) { 8385: my $ulsfn; 8386: while ($ulsfn=readdir(LSDIR)) { 8387: # see if this is a regular file (ignore links produced earlier) 8388: my $thisfile=$ulsdir.'/'.$ulsfn; 8389: unless (-l $thisfile) { 8390: if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) { 8391: if ($1>$version) { $version=$1; } 8392: } 8393: } 8394: } 8395: closedir(LSDIR); 8396: $version++; 8397: } 8398: } 8399: } 8400: return $version; 8401: } 8402: 8403: sub thisversion { 8404: my $fname=shift; 8405: my $version=-1; 8406: if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) { 8407: $version=$1; 8408: } 8409: return $version; 8410: } 8411: 8412: sub subscribe { 8413: my ($userinput,$clientip)=@_; 8414: my $result; 8415: my ($cmd,$fname)=split(/:/,$userinput,2); 8416: my $ownership=&ishome($fname); 8417: if ($ownership eq 'owner') { 8418: # explitly asking for the current version? 8419: unless (-e $fname) { 8420: my $currentversion=&currentversion($fname); 8421: if (&thisversion($fname)==$currentversion) { 8422: if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) { 8423: my $root=$1; 8424: my $extension=$2; 8425: symlink($root.'.'.$extension, 8426: $root.'.'.$currentversion.'.'.$extension); 8427: unless ($extension=~/\.meta$/) { 8428: symlink($root.'.'.$extension.'.meta', 8429: $root.'.'.$currentversion.'.'.$extension.'.meta'); 8430: } 8431: } 8432: } 8433: } 8434: if (-e $fname) { 8435: if (-d $fname) { 8436: $result="directory\n"; 8437: } else { 8438: if (-e "$fname.$clientname") {&unsub($fname,$clientip);} 8439: my $now=time; 8440: my $found=&addline($fname,$clientname,$clientip, 8441: "$clientname:$clientip:$now\n"); 8442: if ($found) { $result="$fname\n"; } 8443: # if they were subscribed to only meta data, delete that 8444: # subscription, when you subscribe to a file you also get 8445: # the metadata 8446: unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); } 8447: $fname=~s/\/home\/httpd\/html\/res/raw/; 8448: my $protocol = $Apache::lonnet::protocol{$perlvar{'lonHostID'}}; 8449: $protocol = 'http' if ($protocol ne 'https'); 8450: $fname=$protocol.'://'.&Apache::lonnet::hostname($perlvar{'lonHostID'})."/".$fname; 8451: $result="$fname\n"; 8452: } 8453: } else { 8454: $result="not_found\n"; 8455: } 8456: } else { 8457: $result="rejected\n"; 8458: } 8459: return $result; 8460: } 8461: # Change the passwd of a unix user. The caller must have 8462: # first verified that the user is a loncapa user. 8463: # 8464: # Parameters: 8465: # user - Unix user name to change. 8466: # pass - New password for the user. 8467: # Returns: 8468: # ok - if success 8469: # other - Some meaningfule error message string. 8470: # NOTE: 8471: # invokes a setuid script to change the passwd. 8472: sub change_unix_password { 8473: my ($user, $pass) = @_; 8474: 8475: &Debug("change_unix_password"); 8476: my $execdir=$perlvar{'lonDaemons'}; 8477: &Debug("Opening lcpasswd pipeline"); 8478: my $pf = IO::File->new("|$execdir/lcpasswd > " 8479: ."$perlvar{'lonDaemons'}" 8480: ."/logs/lcpasswd.log"); 8481: print $pf "$user\n$pass\n$pass\n"; 8482: close $pf; 8483: my $err = $?; 8484: return ($err < @passwderrors) ? $passwderrors[$err] : 8485: "pwchange_falure - unknown error"; 8486: 8487: 8488: } 8489: 8490: 8491: sub make_passwd_file { 8492: my ($uname,$udom,$umode,$npass,$passfilename,$action)=@_; 8493: my $result="ok"; 8494: if ($umode eq 'krb4' or $umode eq 'krb5') { 8495: { 8496: my $pf = IO::File->new(">$passfilename"); 8497: if ($pf) { 8498: print $pf "$umode:$npass\n"; 8499: &update_passwd_history($uname,$udom,$umode,$action); 8500: } else { 8501: $result = "pass_file_failed_error"; 8502: } 8503: } 8504: } elsif ($umode eq 'internal') { 8505: my $ncpass = &hash_passwd($udom,$npass); 8506: { 8507: &Debug("Creating internal auth"); 8508: my $pf = IO::File->new(">$passfilename"); 8509: if($pf) { 8510: print $pf "internal:$ncpass\n"; 8511: &update_passwd_history($uname,$udom,$umode,$action); 8512: } else { 8513: $result = "pass_file_failed_error"; 8514: } 8515: } 8516: } elsif ($umode eq 'localauth') { 8517: { 8518: my $pf = IO::File->new(">$passfilename"); 8519: if($pf) { 8520: print $pf "localauth:$npass\n"; 8521: &update_passwd_history($uname,$udom,$umode,$action); 8522: } else { 8523: $result = "pass_file_failed_error"; 8524: } 8525: } 8526: } elsif ($umode eq 'unix') { 8527: &logthis(">>>Attempt to create unix account blocked -- unix auth not available for new users."); 8528: $result="no_new_unix_accounts"; 8529: } elsif ($umode eq 'none') { 8530: { 8531: my $pf = IO::File->new("> $passfilename"); 8532: if($pf) { 8533: print $pf "none:\n"; 8534: } else { 8535: $result = "pass_file_failed_error"; 8536: } 8537: } 8538: } elsif ($umode eq 'lti') { 8539: my $pf = IO::File->new(">$passfilename"); 8540: if($pf) { 8541: print $pf "lti:\n"; 8542: &update_passwd_history($uname,$udom,$umode,$action); 8543: } else { 8544: $result = "pass_file_failed_error"; 8545: } 8546: } else { 8547: $result="auth_mode_error"; 8548: } 8549: return $result; 8550: } 8551: 8552: sub convert_photo { 8553: my ($start,$dest)=@_; 8554: system("convert $start $dest"); 8555: } 8556: 8557: sub sethost { 8558: my ($remotereq) = @_; 8559: my (undef,$hostid)=split(/:/,$remotereq); 8560: # ignore sethost if we are already correct 8561: if ($hostid eq $currenthostid) { 8562: return 'ok'; 8563: } 8564: 8565: if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; } 8566: if (&Apache::lonnet::get_host_ip($perlvar{'lonHostID'}) 8567: eq &Apache::lonnet::get_host_ip($hostid)) { 8568: $currenthostid =$hostid; 8569: $currentdomainid=&Apache::lonnet::host_domain($hostid); 8570: &set_client_info(); 8571: # &logthis("Setting hostid to $hostid, and domain to $currentdomainid"); 8572: } else { 8573: &logthis("Requested host id $hostid not an alias of ". 8574: $perlvar{'lonHostID'}." refusing connection"); 8575: return 'unable_to_set'; 8576: } 8577: return 'ok'; 8578: } 8579: 8580: sub version { 8581: my ($userinput)=@_; 8582: $remoteVERSION=(split(/:/,$userinput))[1]; 8583: return "version:$VERSION"; 8584: } 8585: 8586: sub get_usersession_config { 8587: my ($dom,$name) = @_; 8588: my ($usersessionconf,$cached)=&Apache::lonnet::is_cached_new($name,$dom); 8589: if (defined($cached)) { 8590: return $usersessionconf; 8591: } else { 8592: my %domconfig = &Apache::lonnet::get_dom('configuration',['usersessions'],$dom); 8593: &Apache::lonnet::do_cache_new($name,$dom,$domconfig{'usersessions'},3600); 8594: return $domconfig{'usersessions'}; 8595: } 8596: return; 8597: } 8598: 8599: sub get_usersearch_config { 8600: my ($dom,$name) = @_; 8601: my ($usersearchconf,$cached)=&Apache::lonnet::is_cached_new($name,$dom); 8602: if (defined($cached)) { 8603: return $usersearchconf; 8604: } else { 8605: my %domconfig = &Apache::lonnet::get_dom('configuration',['directorysrch'],$dom); 8606: &Apache::lonnet::do_cache_new($name,$dom,$domconfig{'directorysrch'},600); 8607: return $domconfig{'directorysrch'}; 8608: } 8609: return; 8610: } 8611: 8612: sub get_prohibited { 8613: my ($dom) = @_; 8614: my $name = 'trust'; 8615: my ($trustconfig,$cached)=&Apache::lonnet::is_cached_new($name,$dom); 8616: unless (defined($cached)) { 8617: my %domconfig = &Apache::lonnet::get_dom('configuration',['trust'],$dom); 8618: &Apache::lonnet::do_cache_new($name,$dom,$domconfig{'trust'},3600); 8619: $trustconfig = $domconfig{'trust'}; 8620: } 8621: my %prohibited; 8622: if (ref($trustconfig)) { 8623: foreach my $prefix (keys(%{$trustconfig})) { 8624: if (ref($trustconfig->{$prefix}) eq 'HASH') { 8625: my $reject; 8626: if (ref($trustconfig->{$prefix}->{'exc'}) eq 'ARRAY') { 8627: if (grep(/^\Q$clientintdom\E$/,@{$trustconfig->{$prefix}->{'exc'}})) { 8628: $reject = 1; 8629: } 8630: } 8631: if (ref($trustconfig->{$prefix}->{'inc'}) eq 'ARRAY') { 8632: if (grep(/^\Q$clientintdom\E$/,@{$trustconfig->{$prefix}->{'inc'}})) { 8633: $reject = 0; 8634: } else { 8635: $reject = 1; 8636: } 8637: } 8638: if ($reject) { 8639: $prohibited{$prefix} = 1; 8640: } 8641: } 8642: } 8643: } 8644: return %prohibited; 8645: } 8646: 8647: sub get_remote_hostable { 8648: my ($dom) = @_; 8649: my $result; 8650: if ($clientintdom) { 8651: $result = 1; 8652: my $remsessconf = &get_usersession_config($dom,'remotesession'); 8653: if (ref($remsessconf) eq 'HASH') { 8654: if (ref($remsessconf->{'remote'}) eq 'HASH') { 8655: if (ref($remsessconf->{'remote'}->{'excludedomain'}) eq 'ARRAY') { 8656: if (grep(/^\Q$clientintdom\E$/,@{$remsessconf->{'remote'}->{'excludedomain'}})) { 8657: $result = 0; 8658: } 8659: } 8660: if (ref($remsessconf->{'remote'}->{'includedomain'}) eq 'ARRAY') { 8661: if (grep(/^\Q$clientintdom\E$/,@{$remsessconf->{'remote'}->{'includedomain'}})) { 8662: $result = 1; 8663: } else { 8664: $result = 0; 8665: } 8666: } 8667: } 8668: } 8669: } 8670: return $result; 8671: } 8672: 8673: sub distro_and_arch { 8674: return $dist.':'.$arch; 8675: } 8676: 8677: # ----------------------------------- POD (plain old documentation, CPAN style) 8678: 8679: =head1 NAME 8680: 8681: lond - "LON Daemon" Server (port "LOND" 5663) 8682: 8683: =head1 SYNOPSIS 8684: 8685: Usage: B<lond> 8686: 8687: Should only be run as user=www. This is a command-line script which 8688: is invoked by B<loncron>. There is no expectation that a typical user 8689: will manually start B<lond> from the command-line. (In other words, 8690: DO NOT START B<lond> YOURSELF.) 8691: 8692: =head1 DESCRIPTION 8693: 8694: There are two characteristics associated with the running of B<lond>, 8695: PROCESS MANAGEMENT (starting, stopping, handling child processes) 8696: and SERVER-SIDE ACTIVITIES (password authentication, user creation, 8697: subscriptions, etc). These are described in two large 8698: sections below. 8699: 8700: B<PROCESS MANAGEMENT> 8701: 8702: Preforker - server who forks first. Runs as a daemon. HUPs. 8703: Uses IDEA encryption 8704: 8705: B<lond> forks off children processes that correspond to the other servers 8706: in the network. Management of these processes can be done at the 8707: parent process level or the child process level. 8708: 8709: B<logs/lond.log> is the location of log messages. 8710: 8711: The process management is now explained in terms of linux shell commands, 8712: subroutines internal to this code, and signal assignments: 8713: 8714: =over 4 8715: 8716: =item * 8717: 8718: PID is stored in B<logs/lond.pid> 8719: 8720: This is the process id number of the parent B<lond> process. 8721: 8722: =item * 8723: 8724: SIGTERM and SIGINT 8725: 8726: Parent signal assignment: 8727: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN; 8728: 8729: Child signal assignment: 8730: $SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also) 8731: (The child dies and a SIGALRM is sent to parent, awaking parent from slumber 8732: to restart a new child.) 8733: 8734: Command-line invocations: 8735: B<kill> B<-s> SIGTERM I<PID> 8736: B<kill> B<-s> SIGINT I<PID> 8737: 8738: Subroutine B<HUNTSMAN>: 8739: This is only invoked for the B<lond> parent I<PID>. 8740: This kills all the children, and then the parent. 8741: The B<lonc.pid> file is cleared. 8742: 8743: =item * 8744: 8745: SIGHUP 8746: 8747: Current bug: 8748: This signal can only be processed the first time 8749: on the parent process. Subsequent SIGHUP signals 8750: have no effect. 8751: 8752: Parent signal assignment: 8753: $SIG{HUP} = \&HUPSMAN; 8754: 8755: Child signal assignment: 8756: none (nothing happens) 8757: 8758: Command-line invocations: 8759: B<kill> B<-s> SIGHUP I<PID> 8760: 8761: Subroutine B<HUPSMAN>: 8762: This is only invoked for the B<lond> parent I<PID>, 8763: This kills all the children, and then the parent. 8764: The B<lond.pid> file is cleared. 8765: 8766: =item * 8767: 8768: SIGUSR1 8769: 8770: Parent signal assignment: 8771: $SIG{USR1} = \&USRMAN; 8772: 8773: Child signal assignment: 8774: $SIG{USR1}= \&logstatus; 8775: 8776: Command-line invocations: 8777: B<kill> B<-s> SIGUSR1 I<PID> 8778: 8779: Subroutine B<USRMAN>: 8780: When invoked for the B<lond> parent I<PID>, 8781: SIGUSR1 is sent to all the children, and the status of 8782: each connection is logged. 8783: 8784: =item * 8785: 8786: SIGUSR2 8787: 8788: Parent Signal assignment: 8789: $SIG{USR2} = \&UpdateHosts 8790: 8791: Child signal assignment: 8792: NONE 8793: 8794: 8795: =item * 8796: 8797: SIGCHLD 8798: 8799: Parent signal assignment: 8800: $SIG{CHLD} = \&REAPER; 8801: 8802: Child signal assignment: 8803: none 8804: 8805: Command-line invocations: 8806: B<kill> B<-s> SIGCHLD I<PID> 8807: 8808: Subroutine B<REAPER>: 8809: This is only invoked for the B<lond> parent I<PID>. 8810: Information pertaining to the child is removed. 8811: The socket port is cleaned up. 8812: 8813: =back 8814: 8815: B<SERVER-SIDE ACTIVITIES> 8816: 8817: Server-side information can be accepted in an encrypted or non-encrypted 8818: method. 8819: 8820: =over 4 8821: 8822: =item ping 8823: 8824: Query a client in the hosts.tab table; "Are you there?" 8825: 8826: =item pong 8827: 8828: Respond to a ping query. 8829: 8830: =item ekey 8831: 8832: Read in encrypted key, make cipher. Respond with a buildkey. 8833: 8834: =item load 8835: 8836: Respond with CPU load based on a computation upon /proc/loadavg. 8837: 8838: =item currentauth 8839: 8840: Reply with current authentication information (only over an 8841: encrypted channel). 8842: 8843: =item auth 8844: 8845: Only over an encrypted channel, reply as to whether a user's 8846: authentication information can be validated. 8847: 8848: =item passwd 8849: 8850: Allow for a password to be set. 8851: 8852: =item makeuser 8853: 8854: Make a user. 8855: 8856: =item changeuserauth 8857: 8858: Allow for authentication mechanism and password to be changed. 8859: 8860: =item home 8861: 8862: Respond to a question "are you the home for a given user?" 8863: 8864: =item update 8865: 8866: Update contents of a subscribed resource. 8867: 8868: =item unsubscribe 8869: 8870: The server is unsubscribing from a resource. 8871: 8872: =item subscribe 8873: 8874: The server is subscribing to a resource. 8875: 8876: =item log 8877: 8878: Place in B<logs/lond.log> 8879: 8880: =item put 8881: 8882: stores hash in namespace 8883: 8884: =item rolesput 8885: 8886: put a role into a user's environment 8887: 8888: =item get 8889: 8890: returns hash with keys from array 8891: reference filled in from namespace 8892: 8893: =item eget 8894: 8895: returns hash with keys from array 8896: reference filled in from namesp (encrypts the return communication) 8897: 8898: =item rolesget 8899: 8900: get a role from a user's environment 8901: 8902: =item del 8903: 8904: deletes keys out of array from namespace 8905: 8906: =item keys 8907: 8908: returns namespace keys 8909: 8910: =item dump 8911: 8912: dumps the complete (or key matching regexp) namespace into a hash 8913: 8914: =item store 8915: 8916: stores hash permanently 8917: for this url; hashref needs to be given and should be a \%hashname; the 8918: remaining args aren't required and if they aren't passed or are '' they will 8919: be derived from the ENV 8920: 8921: =item restore 8922: 8923: returns a hash for a given url 8924: 8925: =item querysend 8926: 8927: Tells client about the lonsql process that has been launched in response 8928: to a sent query. 8929: 8930: =item queryreply 8931: 8932: Accept information from lonsql and make appropriate storage in temporary 8933: file space. 8934: 8935: =item idput 8936: 8937: Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers 8938: for each student, defined perhaps by the institutional Registrar.) 8939: 8940: =item idget 8941: 8942: Returns usernames corresponding to IDs. (These "IDs" are unique identifiers 8943: for each student, defined perhaps by the institutional Registrar.) 8944: 8945: =item iddel 8946: 8947: Deletes one or more ids in a domain's id database. 8948: 8949: =item tmpput 8950: 8951: Accept and store information in temporary space. 8952: 8953: =item tmpget 8954: 8955: Send along temporarily stored information. 8956: 8957: =item ls 8958: 8959: List part of a user's directory. 8960: 8961: =item pushtable 8962: 8963: Pushes a file in /home/httpd/lonTab directory. Currently limited to: 8964: hosts.tab and domain.tab. The old file is copied to *.tab.backup but 8965: must be restored manually in case of a problem with the new table file. 8966: pushtable requires that the request be encrypted and validated via 8967: ValidateManager. The form of the command is: 8968: enc:pushtable tablename <tablecontents> \n 8969: where pushtable, tablename and <tablecontents> will be encrypted, but \n is a 8970: cleartext newline. 8971: 8972: =item Hanging up (exit or init) 8973: 8974: What to do when a client tells the server that they (the client) 8975: are leaving the network. 8976: 8977: =item unknown command 8978: 8979: If B<lond> is sent an unknown command (not in the list above), 8980: it replys to the client "unknown_cmd". 8981: 8982: 8983: =item UNKNOWN CLIENT 8984: 8985: If the anti-spoofing algorithm cannot verify the client, 8986: the client is rejected (with a "refused" message sent 8987: to the client, and the connection is closed. 8988: 8989: =back 8990: 8991: =head1 PREREQUISITES 8992: 8993: IO::Socket 8994: IO::File 8995: Apache::File 8996: POSIX 8997: Crypt::IDEA 8998: GDBM_File 8999: Authen::Krb4 9000: Authen::Krb5 9001: 9002: =head1 COREQUISITES 9003: 9004: none 9005: 9006: =head1 OSNAMES 9007: 9008: linux 9009: 9010: =head1 SCRIPT CATEGORIES 9011: 9012: Server/Process 9013: 9014: =cut 9015: 9016: 9017: =pod 9018: 9019: =head1 LOG MESSAGES 9020: 9021: The messages below can be emitted in the lond log. This log is located 9022: in ~httpd/perl/logs/lond.log Many log messages have HTML encapsulation 9023: to provide coloring if examined from inside a web page. Some do not. 9024: Where color is used, the colors are; Red for sometihhng to get excited 9025: about and to follow up on. Yellow for something to keep an eye on to 9026: be sure it does not get worse, Green,and Blue for informational items. 9027: 9028: In the discussions below, sometimes reference is made to ~httpd 9029: when describing file locations. There isn't really an httpd 9030: user, however there is an httpd directory that gets installed in the 9031: place that user home directories go. On linux, this is usually 9032: (always?) /home/httpd. 9033: 9034: 9035: Some messages are colorless. These are usually (not always) 9036: Green/Blue color level messages. 9037: 9038: =over 2 9039: 9040: =item (Red) LocalConnection rejecting non local: <ip> ne 127.0.0.1 9041: 9042: A local connection negotiation was attempted by 9043: a host whose IP address was not 127.0.0.1. 9044: The socket is closed and the child will exit. 9045: lond has three ways to establish an encyrption 9046: key with a client: 9047: 9048: =over 2 9049: 9050: =item local 9051: 9052: The key is written and read from a file. 9053: This is only valid for connections from localhost. 9054: 9055: =item insecure 9056: 9057: The key is generated by the server and 9058: transmitted to the client. 9059: 9060: =item ssl (secure) 9061: 9062: An ssl connection is negotiated with the client, 9063: the key is generated by the server and sent to the 9064: client across this ssl connection before the 9065: ssl connectionis terminated and clear text 9066: transmission resumes. 9067: 9068: =back 9069: 9070: =item (Red) LocalConnection: caller is insane! init = <init> and type = <type> 9071: 9072: The client is local but has not sent an initialization 9073: string that is the literal "init:local" The connection 9074: is closed and the child exits. 9075: 9076: =item Red CRITICAL Can't get key file <error> 9077: 9078: SSL key negotiation is being attempted but the call to 9079: lonssl::KeyFile failed. This usually means that the 9080: configuration file is not correctly defining or protecting 9081: the directories/files lonCertificateDirectory or 9082: lonnetPrivateKey 9083: <error> is a string that describes the reason that 9084: the key file could not be located. 9085: 9086: =item (Red) CRITICAL Can't get certificates <error> 9087: 9088: SSL key negotiation failed because we were not able to retrives our certificate 9089: or the CA's certificate in the call to lonssl::CertificateFile 9090: <error> is the textual reason this failed. Usual reasons: 9091: 9092: =over 2 9093: 9094: =item Apache config file for loncapa incorrect: 9095: 9096: one of the variables 9097: lonCertificateDirectory, lonnetCertificateAuthority, or lonnetCertificate 9098: undefined or incorrect 9099: 9100: =item Permission error: 9101: 9102: The directory pointed to by lonCertificateDirectory is not readable by lond 9103: 9104: =item Permission error: 9105: 9106: Files in the directory pointed to by lonCertificateDirectory are not readable by lond. 9107: 9108: =item Installation error: 9109: 9110: Either the certificate authority file or the certificate have not 9111: been installed in lonCertificateDirectory. 9112: 9113: =item (Red) CRITICAL SSL Socket promotion failed: <err> 9114: 9115: The promotion of the connection from plaintext to SSL failed 9116: <err> is the reason for the failure. There are two 9117: system calls involved in the promotion (one of which failed), 9118: a dup to produce 9119: a second fd on the raw socket over which the encrypted data 9120: will flow and IO::SOcket::SSL->new_from_fd which creates 9121: the SSL connection on the duped fd. 9122: 9123: =item (Blue) WARNING client did not respond to challenge 9124: 9125: This occurs on an insecure (non SSL) connection negotiation request. 9126: lond generates some number from the time, the PID and sends it to 9127: the client. The client must respond by echoing this information back. 9128: If the client does not do so, that's a violation of the challenge 9129: protocols and the connection will be failed. 9130: 9131: =item (Red) No manager table. Nobody can manage!! 9132: 9133: lond has the concept of privileged hosts that 9134: can perform remote management function such 9135: as update the hosts.tab. The manager hosts 9136: are described in the 9137: ~httpd/lonTabs/managers.tab file. 9138: this message is logged if this file is missing. 9139: 9140: 9141: =item (Green) Registering manager <dnsname> as <cluster_name> with <ipaddress> 9142: 9143: Reports the successful parse and registration 9144: of a specific manager. 9145: 9146: =item Green existing host <clustername:dnsname> 9147: 9148: The manager host is already defined in the hosts.tab 9149: the information in that table, rather than the info in the 9150: manager table will be used to determine the manager's ip. 9151: 9152: =item (Red) Unable to craete <filename> 9153: 9154: lond has been asked to create new versions of an administrative 9155: file (by a manager). When this is done, the new file is created 9156: in a temp file and then renamed into place so that there are always 9157: usable administrative files, even if the update fails. This failure 9158: message means that the temp file could not be created. 9159: The update is abandoned, and the old file is available for use. 9160: 9161: =item (Green) CopyFile from <oldname> to <newname> failed 9162: 9163: In an update of administrative files, the copy of the existing file to a 9164: backup file failed. The installation of the new file may still succeed, 9165: but there will not be a back up file to rever to (this should probably 9166: be yellow). 9167: 9168: =item (Green) Pushfile: backed up <oldname> to <newname> 9169: 9170: See above, the backup of the old administrative file succeeded. 9171: 9172: =item (Red) Pushfile: Unable to install <filename> <reason> 9173: 9174: The new administrative file could not be installed. In this case, 9175: the old administrative file is still in use. 9176: 9177: =item (Green) Installed new < filename>. 9178: 9179: The new administrative file was successfullly installed. 9180: 9181: =item (Red) Reinitializing lond pid=<pid> 9182: 9183: The lonc child process <pid> will be sent a USR2 9184: signal. 9185: 9186: =item (Red) Reinitializing self 9187: 9188: We've been asked to re-read our administrative files,and 9189: are doing so. 9190: 9191: =item (Yellow) error:Invalid process identifier <ident> 9192: 9193: A reinit command was received, but the target part of the 9194: command was not valid. It must be either 9195: 'lond' or 'lonc' but was <ident> 9196: 9197: =item (Green) isValideditCommand checking: Command = <command> Key = <key> newline = <newline> 9198: 9199: Checking to see if lond has been handed a valid edit 9200: command. It is possible the edit command is not valid 9201: in that case there are no log messages to indicate that. 9202: 9203: =item Result of password change for <username> pwchange_success 9204: 9205: The password for <username> was 9206: successfully changed. 9207: 9208: =item Unable to open <user> passwd to change password 9209: 9210: Could not rewrite the 9211: internal password file for a user 9212: 9213: =item Result of password change for <user> : <result> 9214: 9215: A unix password change for <user> was attempted 9216: and the pipe returned <result> 9217: 9218: =item LWP GET: <message> for <fname> (<remoteurl>) 9219: 9220: The lightweight process fetch for a resource failed 9221: with <message> the local filename that should 9222: have existed/been created was <fname> the 9223: corresponding URI: <remoteurl> This is emitted in several 9224: places. 9225: 9226: =item Unable to move <transname> to <destname> 9227: 9228: From fetch_user_file_handler - the user file was replicated but could not 9229: be mv'd to its final location. 9230: 9231: =item Looking for <domain> <username> 9232: 9233: From user_has_session_handler - This should be a Debug call instead 9234: it indicates lond is about to check whether the specified user has a 9235: session active on the specified domain on the local host. 9236: 9237: =item Client <ip> (<name>) hanging up: <input> 9238: 9239: lond has been asked to exit by its client. The <ip> and <name> identify the 9240: client systemand <input> is the full exit command sent to the server. 9241: 9242: =item Red CRITICAL: ABNORMAL EXIT. child <pid> for server <hostname> died through a crass with this error->[<message>]. 9243: 9244: A lond child terminated. NOte that this termination can also occur when the 9245: child receives the QUIT or DIE signals. <pid> is the process id of the child, 9246: <hostname> the host lond is working for, and <message> the reason the child died 9247: to the best of our ability to get it (I would guess that any numeric value 9248: represents and errno value). This is immediately followed by 9249: 9250: =item Famous last words: Catching exception - <log> 9251: 9252: Where log is some recent information about the state of the child. 9253: 9254: =item Red CRITICAL: TIME OUT <pid> 9255: 9256: Some timeout occured for server <pid>. THis is normally a timeout on an LWP 9257: doing an HTTP::GET. 9258: 9259: =item child <pid> died 9260: 9261: The reaper caught a SIGCHILD for the lond child process <pid> 9262: This should be modified to also display the IP of the dying child 9263: $children{$pid} 9264: 9265: =item Unknown child 0 died 9266: A child died but the wait for it returned a pid of zero which really should not 9267: ever happen. 9268: 9269: =item Child <which> - <pid> looks like we missed it's death 9270: 9271: When a sigchild is received, the reaper process checks all children to see if they are 9272: alive. If children are dying quite quickly, the lack of signal queuing can mean 9273: that a signal hearalds the death of more than one child. If so this message indicates 9274: which other one died. <which> is the ip of a dead child 9275: 9276: =item Free socket: <shutdownretval> 9277: 9278: The HUNTSMAN sub was called due to a SIGINT in a child process. The socket is being shutdown. 9279: for whatever reason, <shutdownretval> is printed but in fact shutdown() is not documented 9280: to return anything. This is followed by: 9281: 9282: =item Red CRITICAL: Shutting down 9283: 9284: Just prior to exit. 9285: 9286: =item Free socket: <shutdownretval> 9287: 9288: The HUPSMAN sub was called due to a SIGHUP. all children get killsed, and lond execs itself. 9289: This is followed by: 9290: 9291: =item (Red) CRITICAL: Restarting 9292: 9293: lond is about to exec itself to restart. 9294: 9295: =item (Blue) Updating connections 9296: 9297: (In response to a USR2). All the children (except the one for localhost) 9298: are about to be killed, the hosts tab reread, and Apache reloaded via apachereload. 9299: 9300: =item (Blue) UpdateHosts killing child <pid> for ip <ip> 9301: 9302: Due to USR2 as above. 9303: 9304: =item (Green) keeping child for ip <ip> (pid = <pid>) 9305: 9306: In response to USR2 as above, the child indicated is not being restarted because 9307: it's assumed that we'll always need a child for the localhost. 9308: 9309: 9310: =item Going to check on the children 9311: 9312: Parent is about to check on the health of the child processes. 9313: Note that this is in response to a USR1 sent to the parent lond. 9314: there may be one or more of the next two messages: 9315: 9316: =item <pid> is dead 9317: 9318: A child that we have in our child hash as alive has evidently died. 9319: 9320: =item Child <pid> did not respond 9321: 9322: In the health check the child <pid> did not update/produce a pid_.txt 9323: file when sent it's USR1 signal. That process is killed with a 9 signal, as it's 9324: assumed to be hung in some un-fixable way. 9325: 9326: =item Finished checking children 9327: 9328: Master processs's USR1 processing is cojmplete. 9329: 9330: =item (Red) CRITICAL: ------- Starting ------ 9331: 9332: (There are more '-'s on either side). Lond has forked itself off to 9333: form a new session and is about to start actual initialization. 9334: 9335: =item (Green) Attempting to start child (<client>) 9336: 9337: Started a new child process for <client>. Client is IO::Socket object 9338: connected to the child. This was as a result of a TCP/IP connection from a client. 9339: 9340: =item Unable to determine who caller was, getpeername returned nothing 9341: 9342: In child process initialization. either getpeername returned undef or 9343: a zero sized object was returned. Processing continues, but in my opinion, 9344: this should be cause for the child to exit. 9345: 9346: =item Unable to determine clientip 9347: 9348: In child process initialization. The peer address from getpeername was not defined. 9349: The client address is stored as "Unavailable" and processing continues. 9350: 9351: =item (Yellow) INFO: Connection <ip> <name> connection type = <type> 9352: 9353: In child initialization. A good connectionw as received from <ip>. 9354: 9355: =over 2 9356: 9357: =item <name> 9358: 9359: is the name of the client from hosts.tab. 9360: 9361: =item <type> 9362: 9363: Is the connection type which is either 9364: 9365: =over 2 9366: 9367: =item manager 9368: 9369: The connection is from a manager node, not in hosts.tab 9370: 9371: =item client 9372: 9373: the connection is from a non-manager in the hosts.tab 9374: 9375: =item both 9376: 9377: The connection is from a manager in the hosts.tab. 9378: 9379: =back 9380: 9381: =back 9382: 9383: =item (Blue) Certificates not installed -- trying insecure auth 9384: 9385: One of the certificate file, key file or 9386: certificate authority file could not be found for a client attempting 9387: SSL connection intiation. COnnection will be attemptied in in-secure mode. 9388: (this would be a system with an up to date lond that has not gotten a 9389: certificate from us). 9390: 9391: =item (Green) Successful local authentication 9392: 9393: A local connection successfully negotiated the encryption key. 9394: In this case the IDEA key is in a file (that is hopefully well protected). 9395: 9396: =item (Green) Successful ssl authentication with <client> 9397: 9398: The client (<client> is the peer's name in hosts.tab), has successfully 9399: negotiated an SSL connection with this child process. 9400: 9401: =item (Green) Successful insecure authentication with <client> 9402: 9403: 9404: The client has successfully negotiated an insecure connection withthe child process. 9405: 9406: =item (Yellow) Attempted insecure connection disallowed 9407: 9408: The client attempted and failed to successfully negotiate a successful insecure 9409: connection. This can happen either because the variable londAllowInsecure is false 9410: or undefined, or becuse the child did not successfully echo back the challenge 9411: string. 9412: 9413: 9414: =back 9415: 9416: =back 9417: 9418: 9419: =cut

Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator at root@localhost to inform them of the time this error occurred, and the actions you performed just before this error.