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version 1.26, 2000/12/05 19:14:59
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version 1.178.2.17, 2004/04/19 11:28:18
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| #!/usr/bin/perl |
#!/usr/bin/perl |
| # The LearningOnline Network |
# The LearningOnline Network |
| # lond "LON Daemon" Server (port "LOND" 5663) |
# lond "LON Daemon" Server (port "LOND" 5663) |
| # 5/26/99,6/4,6/10,6/11,6/14,6/15,6/26,6/28,6/30, |
# |
| # 7/8,7/9,7/10,7/12,7/17,7/19,9/21, |
# $Id$ |
| # 10/7,10/8,10/9,10/11,10/13,10/15,11/4,11/16, |
# |
| # 12/7,12/15,01/06,01/11,01/12,01/14,2/8, |
# Copyright Michigan State University Board of Trustees |
| # 03/07,05/31 Gerd Kortemeyer |
# |
| # 06/26 Scott Harrison |
# This file is part of the LearningOnline Network with CAPA (LON-CAPA). |
| # 06/29,06/30,07/14,07/15,07/17,07/20,07/25,09/18 Gerd Kortemeyer |
# |
| # 12/05 Scott Harrison |
# LON-CAPA is free software; you can redistribute it and/or modify |
| # 12/05 Gerd Kortemeyer |
# it under the terms of the GNU General Public License as published by |
| # |
# the Free Software Foundation; either version 2 of the License, or |
| # based on "Perl Cookbook" ISBN 1-56592-243-3 |
# (at your option) any later version. |
| # preforker - server who forks first |
# |
| # runs as a daemon |
# LON-CAPA is distributed in the hope that it will be useful, |
| # HUPs |
# but WITHOUT ANY WARRANTY; without even the implied warranty of |
| # uses IDEA encryption |
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| |
# GNU General Public License for more details. |
| |
# |
| |
# You should have received a copy of the GNU General Public License |
| |
# along with LON-CAPA; if not, write to the Free Software |
| |
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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# |
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# /home/httpd/html/adm/gpl.txt |
| |
# |
| |
|
| |
|
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# http://www.lon-capa.org/ |
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# |
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|
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use strict; |
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use lib '/home/httpd/lib/perl/'; |
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use LONCAPA::Configuration; |
| |
|
| use IO::Socket; |
use IO::Socket; |
| use IO::File; |
use IO::File; |
| use Apache::File; |
#use Apache::File; |
| use Symbol; |
use Symbol; |
| use POSIX; |
use POSIX; |
| use Crypt::IDEA; |
use Crypt::IDEA; |
| use LWP::UserAgent(); |
use LWP::UserAgent(); |
| use GDBM_File; |
use GDBM_File; |
| use Authen::Krb4; |
use Authen::Krb4; |
| |
use Authen::Krb5; |
| |
use lib '/home/httpd/lib/perl/'; |
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use localauth; |
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use File::Copy; |
| |
use LONCAPA::ConfigFileEdit; |
| |
|
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my $DEBUG = 1; # Non zero to enable debug log entries. |
| |
|
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my $status=''; |
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my $lastlog=''; |
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|
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my $VERSION='$Revision$'; #' stupid emacs |
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my $remoteVERSION; |
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my $currenthostid; |
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my $currentdomainid; |
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|
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my $client; |
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my $clientip; |
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my $clientname; |
| |
|
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my $cipher; # Cipher key negotiated with client. |
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my $tmpsnum = 0;; # Id of tmpputs. |
| |
|
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my $server; |
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my $thisserver; |
| |
|
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# |
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# Connection type is: |
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# client - All client actions are allowed |
| |
# manager - only management functions allowed. |
| |
# both - Both management and client actions are allowed |
| |
# |
| |
|
| # grabs exception and records it to log before exiting |
my $ConnectionType; |
| sub catchexception { |
|
| my ($signal)=@_; |
my %hostid; |
| $SIG{'QUIT'}='DEFAULT'; |
my %hostdom; |
| $SIG{__DIE__}='DEFAULT'; |
my %hostip; |
| &logthis("<font color=red>CRITICAL: " |
|
| ."ABNORMAL EXIT. Child $$ for server $wasserver died through " |
my %managers; # Ip -> manager names |
| ."$signal with this parameter->[$@]</font>"); |
|
| if ($client) { print $client "error: $@\n"; } |
my %perlvar; # Will have the apache conf defined perl vars. |
| die($@); |
|
| |
# |
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# The hash below is used for command dispatching, and is therefore keyed on the request keyword. |
| |
# Each element of the hash contains a reference to an array that contains: |
| |
# A reference to a sub that executes the request corresponding to the keyword. |
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# A flag that is true if the request must be encoded to be acceptable. |
| |
# A mask with bits as follows: |
| |
# CLIENT_OK - Set when the function is allowed by ordinary clients |
| |
# MANAGER_OK - Set when the function is allowed to manager clients. |
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# |
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my $CLIENT_OK = 1; |
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my $MANAGER_OK = 2; |
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my %Dispatcher; |
| |
|
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# |
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# The array below are password error strings." |
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# |
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my $lastpwderror = 13; # Largest error number from lcpasswd. |
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my @passwderrors = ("ok", |
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"lcpasswd must be run as user 'www'", |
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"lcpasswd got incorrect number of arguments", |
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"lcpasswd did not get the right nubmer of input text lines", |
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"lcpasswd too many simultaneous pwd changes in progress", |
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"lcpasswd User does not exist.", |
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"lcpasswd Incorrect current passwd", |
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"lcpasswd Unable to su to root.", |
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"lcpasswd Cannot set new passwd.", |
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"lcpasswd Username has invalid characters", |
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"lcpasswd Invalid characters in password", |
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"11", "12", |
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"lcpasswd Password mismatch"); |
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|
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|
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# The array below are lcuseradd error strings.: |
| |
|
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my $lastadderror = 13; |
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my @adderrors = ("ok", |
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"User ID mismatch, lcuseradd must run as user www", |
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"lcuseradd Incorrect number of command line parameters must be 3", |
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"lcuseradd Incorrect number of stdinput lines, must be 3", |
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"lcuseradd Too many other simultaneous pwd changes in progress", |
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"lcuseradd User does not exist", |
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"lcuseradd Unable to make www member of users's group", |
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"lcuseradd Unable to su to root", |
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"lcuseradd Unable to set password", |
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"lcuseradd Usrname has invalid characters", |
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"lcuseradd Password has an invalid character", |
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"lcuseradd User already exists", |
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"lcuseradd Could not add user.", |
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"lcuseradd Password mismatch"); |
| |
|
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# |
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# Statistics that are maintained and dislayed in the status line. |
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# |
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my $Transactions; # Number of attempted transactions. |
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my $Failures; # Number of transcations failed. |
| |
|
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# ResetStatistics: |
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# Resets the statistics counters: |
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# |
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sub ResetStatistics { |
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$Transactions = 0; |
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$Failures = 0; |
| } |
} |
| |
|
| # grabs exception and records it to log before exiting |
# |
| # NOTE: we must NOT use the regular (non-overrided) die function in |
# Return true if client is a manager. |
| # the code because a handler CANNOT be attached to it |
# |
| # (despite what some of the documentation says about SIG{__DIE__}. |
sub isManager { |
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return (($ConnectionType eq "manager") || ($ConnectionType eq "both")); |
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} |
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# |
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# Return tru if client can do client functions |
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# |
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sub isClient { |
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return (($ConnectionType eq "client") || ($ConnectionType eq "both")); |
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} |
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# |
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# Ties a domain level resource file to a hash. |
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# If requested a history entry is created in the associated hist file. |
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# |
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# Parameters: |
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# domain - Name of the domain in which the resource file lives. |
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# namespace - Name of the hash within that domain. |
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# how - How to tie the hash (e.g. GDBM_WRCREAT()). |
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# loghead - Optional parameter, if present a log entry is created |
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# in the associated history file and this is the first part |
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# of that entry. |
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# logtail - Goes along with loghead, The actual logentry is of the |
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# form $loghead:<timestamp>:logtail. |
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# Returns: |
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# Reference to a hash bound to the db file or alternatively undef |
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# if the tie failed. |
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# |
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sub TieDomainHash { |
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my $domain = shift; |
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my $namespace = shift; |
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my $how = shift; |
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|
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# Filter out any whitespace in the domain name: |
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|
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$domain =~ s/\W//g; |
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|
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# We have enough to go on to tie the hash: |
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|
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my $UserTopDir = $perlvar{'lonUsersDir'}; |
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my $DomainDir = $UserTopDir."/$domain"; |
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my $ResourceFile = $DomainDir."/$namespace.db"; |
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my %hash; |
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if(tie(%hash, 'GDBM_File', $ResourceFile, $how, 0640)) { |
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if (scalar @_) { # Need to log the operation. |
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my $logFh = IO::File->new(">>$DomainDir/$namespace.hist"); |
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if($logFh) { |
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my $TimeStamp = time; |
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my ($loghead, $logtail) = @_; |
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print $logFh "$loghead:$TimeStamp:$logtail\n"; |
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} |
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} |
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return \%hash; # Return the tied hash. |
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} |
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else { |
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return undef; # Tie failed. |
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} |
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} |
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|
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# |
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# Ties a user's resource file to a hash. |
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# If necessary, an appropriate history |
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# log file entry is made as well. |
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# This sub factors out common code from the subs that manipulate |
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# the various gdbm files that keep keyword value pairs. |
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# Parameters: |
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# domain - Name of the domain the user is in. |
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# user - Name of the 'current user'. |
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# namespace - Namespace representing the file to tie. |
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# how - What the tie is done to (e.g. GDBM_WRCREAT(). |
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# loghead - Optional first part of log entry if there may be a |
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# history file. |
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# what - Optional tail of log entry if there may be a history |
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# file. |
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# Returns: |
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# hash to which the database is tied. It's up to the caller to untie. |
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# undef if the has could not be tied. |
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# |
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sub TieUserHash { |
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my $domain = shift; |
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my $user = shift; |
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my $namespace = shift; |
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my $how = shift; |
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|
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$namespace=~s/\//\_/g; # / -> _ |
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$namespace=~s/\W//g; # whitespace eliminated. |
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my $proname = propath($domain, $user); |
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|
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# If this is a namespace for which a history is kept, |
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# make the history log entry: |
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|
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|
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unless ($namespace =~/^nohist\_/ && (scalar @_ > 0)) { |
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my $hfh = IO::File->new(">>$proname/$namespace.hist"); |
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if($hfh) { |
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my $now = time; |
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my $loghead = shift; |
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my $what = shift; |
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print $hfh "$loghead:$now:$what\n"; |
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} |
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} |
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# Tie the database. |
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|
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my %hash; |
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if(tie(%hash, 'GDBM_File', "$proname/$namespace.db", |
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$how, 0640)) { |
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return \%hash; |
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} |
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else { |
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return undef; |
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} |
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|
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} |
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|
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# |
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# Get a Request: |
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# Gets a Request message from the client. The transaction |
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# is defined as a 'line' of text. We remove the new line |
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# from the text line. |
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# |
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sub GetRequest { |
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my $input = <$client>; |
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chomp($input); |
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|
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Debug("Request = $input\n"); |
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|
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&status('Processing '.$clientname.':'.$input); |
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|
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return $input; |
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} |
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# |
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# Decipher encoded traffic |
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# Parameters: |
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# input - Encoded data. |
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# Returns: |
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# Decoded data or undef if encryption key was not yet negotiated. |
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# Implicit input: |
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# cipher - This global holds the negotiated encryption key. |
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# |
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sub Decipher { |
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my $input = shift; |
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my $output = ''; |
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|
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|
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if($cipher) { |
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my($enc, $enclength, $encinput) = split(/:/, $input); |
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for(my $encidx = 0; $encidx < length($encinput); $encidx += 16) { |
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$output .= |
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$cipher->decrypt(pack("H16", substr($encinput, $encidx, 16))); |
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} |
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return substr($output, 0, $enclength); |
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} else { |
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return undef; |
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} |
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} |
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|
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# |
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# Register a command processor. This function is invoked to register a sub |
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# to process a request. Once registered, the ProcessRequest sub can automatically |
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# dispatch requests to an appropriate sub, and do the top level validity checking |
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# as well: |
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# - Is the keyword recognized. |
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# - Is the proper client type attempting the request. |
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# - Is the request encrypted if it has to be. |
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# Parameters: |
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# $RequestName - Name of the request being registered. |
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# This is the command request that will match |
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# against the hash keywords to lookup the information |
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# associated with the dispatch information. |
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# $Procedure - Reference to a sub to call to process the request. |
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# All subs get called as follows: |
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# Procedure($cmd, $tail, $replyfd, $key) |
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# $cmd - the actual keyword that invoked us. |
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# $tail - the tail of the request that invoked us. |
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# $replyfd- File descriptor connected to the client |
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# $MustEncode - True if the request must be encoded to be good. |
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# $ClientOk - True if it's ok for a client to request this. |
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# $ManagerOk - True if it's ok for a manager to request this. |
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# Side effects: |
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# - On success, the Dispatcher hash has an entry added for the key $RequestName |
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# - On failure, the program will die as it's a bad internal bug to try to |
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# register a duplicate command handler. |
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# |
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sub RegisterHandler { |
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my $RequestName = shift; |
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my $Procedure = shift; |
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my $MustEncode = shift; |
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my $ClientOk = shift; |
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my $ManagerOk = shift; |
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|
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# Don't allow duplication# |
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|
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if (defined $Dispatcher{$RequestName}) { |
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die "Attempting to define a duplicate request handler for $RequestName\n"; |
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} |
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# Build the client type mask: |
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|
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my $ClientTypeMask = 0; |
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if($ClientOk) { |
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$ClientTypeMask |= $CLIENT_OK; |
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} |
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if($ManagerOk) { |
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$ClientTypeMask |= $MANAGER_OK; |
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} |
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|
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# Enter the hash: |
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|
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my @entry = ($Procedure, $MustEncode, $ClientTypeMask); |
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|
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$Dispatcher{$RequestName} = \@entry; |
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|
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|
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} |
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|
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#--------------------- Request Handlers -------------------------------------------- |
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# |
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# By convention each request handler registers itself prior to the sub declaration: |
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# |
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|
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# Handles ping requests. |
| |
# Parameters: |
| |
# $cmd - the actual keyword that invoked us. |
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# $tail - the tail of the request that invoked us. |
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# $replyfd- File descriptor connected to the client |
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# Implicit Inputs: |
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# $currenthostid - Global variable that carries the name of the host we are |
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# known as. |
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# Returns: |
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# 1 - Ok to continue processing. |
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# 0 - Program should exit. |
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# Side effects: |
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# Reply information is sent to the client. |
| |
|
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sub PingHandler { |
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my $cmd = shift; |
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my $tail = shift; |
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my $client = shift; |
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|
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Reply( $client,"$currenthostid\n","$cmd:$tail"); |
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|
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return 1; |
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} |
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RegisterHandler("ping", \&PingHandler, 0, 1, 1); # Ping unencoded, client or manager. |
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# |
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# Handles pong reequests: |
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# Parameters: |
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# $cmd - the actual keyword that invoked us. |
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# $tail - the tail of the request that invoked us. |
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# $replyfd- File descriptor connected to the client |
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# Implicit Inputs: |
| |
# $currenthostid - Global variable that carries the name of the host we are |
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# connected to. |
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# Returns: |
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# 1 - Ok to continue processing. |
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# 0 - Program should exit. |
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# Side effects: |
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# Reply information is sent to the client. |
| |
|
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sub PongHandler { |
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my $cmd = shift; |
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my $tail = shift; |
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my $replyfd = shift; |
| |
|
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my $reply=&reply("ping",$clientname); |
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Reply( $replyfd, "$currenthostid:$reply\n", "$cmd:$tail"); |
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return 1; |
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} |
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RegisterHandler("pong", \&PongHandler, 0, 1, 1); # Pong unencoded, client or manager |
| |
|
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# |
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# EstablishKeyHandler: |
| |
# Called to establish an encrypted session key with the remote client. |
| |
# |
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# Parameters: |
| |
# $cmd - the actual keyword that invoked us. |
| |
# $tail - the tail of the request that invoked us. |
| |
# $replyfd- File descriptor connected to the client |
| |
# Implicit Inputs: |
| |
# $currenthostid - Global variable that carries the name of the host |
| |
# known as. |
| |
# $clientname - Global variable that carries the name of the hsot we're connected to. |
| |
# Returns: |
| |
# 1 - Ok to continue processing. |
| |
# 0 - Program should exit. |
| |
# Implicit Outputs: |
| |
# Reply information is sent to the client. |
| |
# $cipher is set with a reference to a new IDEA encryption object. |
| |
# |
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sub EstablishKeyHandler { |
| |
my $cmd = shift; |
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my $tail = shift; |
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my $replyfd = shift; |
| |
|
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my $buildkey=time.$$.int(rand 100000); |
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$buildkey=~tr/1-6/A-F/; |
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$buildkey=int(rand 100000).$buildkey.int(rand 100000); |
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my $key=$currenthostid.$clientname; |
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$key=~tr/a-z/A-Z/; |
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$key=~tr/G-P/0-9/; |
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$key=~tr/Q-Z/0-9/; |
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$key=$key.$buildkey.$key.$buildkey.$key.$buildkey; |
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$key=substr($key,0,32); |
| |
my $cipherkey=pack("H32",$key); |
| |
$cipher=new IDEA $cipherkey; |
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Reply($replyfd, "$buildkey\n", "$cmd:$tail"); |
| |
|
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return 1; |
| |
|
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} |
| |
RegisterHandler("ekey", \&EstablishKeyHandler, 0, 1,1); |
| |
|
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# LoadHandler: |
| |
# Handler for the load command. Returns the current system load average |
| |
# to the requestor. |
| |
# |
| |
# Parameters: |
| |
# $cmd - the actual keyword that invoked us. |
| |
# $tail - the tail of the request that invoked us. |
| |
# $replyfd- File descriptor connected to the client |
| |
# Implicit Inputs: |
| |
# $currenthostid - Global variable that carries the name of the host |
| |
# known as. |
| |
# $clientname - Global variable that carries the name of the hsot we're connected to. |
| |
# Returns: |
| |
# 1 - Ok to continue processing. |
| |
# 0 - Program should exit. |
| |
# Side effects: |
| |
# Reply information is sent to the client. |
| |
sub LoadHandler { |
| |
my $cmd = shift; |
| |
my $tail = shift; |
| |
my $replyfd = shift; |
| |
|
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# Get the load average from /proc/loadavg and calculate it as a percentage of |
| |
# the allowed load limit as set by the perl global variable lonLoadLim |
| |
|
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my $loadavg; |
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my $loadfile=IO::File->new('/proc/loadavg'); |
| |
|
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$loadavg=<$loadfile>; |
| |
$loadavg =~ s/\s.*//g; # Extract the first field only. |
| |
|
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my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'}; |
| |
|
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Reply( $replyfd, "$loadpercent\n", "$cmd:$tail"); |
| |
|
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return 1; |
| |
} |
| |
RegisterHandler("load", \&LoadHandler, 0, 1, 0); |
| |
|
| |
|
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# |
| |
# Process the userload request. This sub returns to the client the current |
| |
# user load average. It can be invoked either by clients or managers. |
| |
# |
| |
# Parameters: |
| |
# $cmd - the actual keyword that invoked us. |
| |
# $tail - the tail of the request that invoked us. |
| |
# $replyfd- File descriptor connected to the client |
| |
# Implicit Inputs: |
| |
# $currenthostid - Global variable that carries the name of the host |
| |
# known as. |
| |
# $clientname - Global variable that carries the name of the hsot we're connected to. |
| |
# Returns: |
| |
# 1 - Ok to continue processing. |
| |
# 0 - Program should exit |
| |
# Implicit inputs: |
| |
# whatever the userload() function requires. |
| |
# Implicit outputs: |
| |
# the reply is written to the client. |
| |
# |
| |
sub UserLoadHandler { |
| |
my $cmd = shift; |
| |
my $tail = shift; |
| |
my $replyfd = shift; |
| |
|
| |
my $userloadpercent=&userload(); |
| |
Reply($replyfd, "$userloadpercent\n", "$cmd:$tail"); |
| |
|
| |
return 1; |
| |
} |
| |
RegisterHandler("userload", \&UserLoadHandler, 0, 1, 0); |
| |
|
| |
# Process a request for the authorization type of a user: |
| |
# (userauth). |
| |
# |
| |
# Parameters: |
| |
# $cmd - the actual keyword that invoked us. |
| |
# $tail - the tail of the request that invoked us. |
| |
# $replyfd- File descriptor connected to the client |
| |
# Returns: |
| |
# 1 - Ok to continue processing. |
| |
# 0 - Program should exit |
| |
# Implicit outputs: |
| |
# The user authorization type is written to the client. |
| |
# |
| |
sub UserAuthorizationType { |
| |
my $cmd = shift; |
| |
my $tail = shift; |
| |
my $replyfd = shift; |
| |
|
| |
my $userinput = "$cmd:$tail"; |
| |
|
| |
# Pull the domain and username out of the command tail. |
| |
# and call GetAuthType to determine the authentication type. |
| |
|
| |
my ($udom,$uname)=split(/:/,$tail); |
| |
my $result = GetAuthType($udom, $uname); |
| |
if($result eq "nouser") { |
| |
Failure( $replyfd, "unknown_user\n", $userinput); |
| |
} else { |
| |
# |
| |
# We only want to pass the second field from GetAuthType |
| |
# for ^krb.. otherwise we'll be handing out the encrypted |
| |
# password for internals e.g. |
| |
# |
| |
my ($type,$otherinfo) = split(/:/,$result); |
| |
if($type =~ /^krb/) { |
| |
$type = $result; |
| |
} |
| |
Reply( $replyfd, "$type\n", $userinput); |
| |
} |
| |
|
| |
return 1; |
| |
} |
| |
RegisterHandler("currentauth", \&UserAuthorizationType, 1, 1, 0); |
| |
# |
| |
# Process a request by a manager to push a hosts or domain table |
| |
# to us. We pick apart the command and pass it on to the subs |
| |
# that already exist to do this. |
| |
# |
| |
# Parameters: |
| |
# $cmd - the actual keyword that invoked us. |
| |
# $tail - the tail of the request that invoked us. |
| |
# $client - File descriptor connected to the client |
| |
# Returns: |
| |
# 1 - Ok to continue processing. |
| |
# 0 - Program should exit |
| |
# Implicit Output: |
| |
# a reply is written to the client. |
| |
|
| |
sub PushFileHandler { |
| |
my $cmd = shift; |
| |
my $tail = shift; |
| |
my $client = shift; |
| |
|
| |
my $userinput = "$cmd:$tail"; |
| |
|
| |
# At this time we only know that the IP of our partner is a valid manager |
| |
# the code below is a hook to do further authentication (e.g. to resolve |
| |
# spoofing). |
| |
|
| |
my $cert = GetCertificate($userinput); |
| |
if(ValidManager($cert)) { |
| |
|
| |
# Now presumably we have the bona fides of both the peer host and the |
| |
# process making the request. |
| |
|
| |
my $reply = PushFile($userinput); |
| |
Reply($client, "$reply\n", $userinput); |
| |
|
| sub catchdie { |
} else { |
| my ($message)=@_; |
Failure( $client, "refused\n", $userinput); |
| |
} |
| |
} |
| |
RegisterHandler("pushfile", \&PushFileHandler, 1, 0, 1); |
| |
|
| |
|
| |
|
| |
# Process a reinit request. Reinit requests that either |
| |
# lonc or lond be reinitialized so that an updated |
| |
# host.tab or domain.tab can be processed. |
| |
# |
| |
# Parameters: |
| |
# $cmd - the actual keyword that invoked us. |
| |
# $tail - the tail of the request that invoked us. |
| |
# $client - File descriptor connected to the client |
| |
# Returns: |
| |
# 1 - Ok to continue processing. |
| |
# 0 - Program should exit |
| |
# Implicit output: |
| |
# a reply is sent to the client. |
| |
# |
| |
sub ReinitProcessHandler { |
| |
my $cmd = shift; |
| |
my $tail = shift; |
| |
my $client = shift; |
| |
|
| |
my $userinput = "$cmd:$tail"; |
| |
|
| |
my $cert = GetCertificate($userinput); |
| |
if(ValidManager($cert)) { |
| |
chomp($userinput); |
| |
my $reply = ReinitProcess($userinput); |
| |
Reply( $client, "$reply\n", $userinput); |
| |
} else { |
| |
Failure( $client, "refused\n", $userinput); |
| |
} |
| |
return 1; |
| |
} |
| |
|
| |
RegisterHandler("reinit", \&ReinitProcessHandler, 1, 0, 1); |
| |
|
| |
# Process the editing script for a table edit operation. |
| |
# the editing operation must be encrypted and requested by |
| |
# a manager host. |
| |
# |
| |
# Parameters: |
| |
# $cmd - the actual keyword that invoked us. |
| |
# $tail - the tail of the request that invoked us. |
| |
# $client - File descriptor connected to the client |
| |
# Returns: |
| |
# 1 - Ok to continue processing. |
| |
# 0 - Program should exit |
| |
# Implicit output: |
| |
# a reply is sent to the client. |
| |
# |
| |
sub EditTableHandler { |
| |
my $command = shift; |
| |
my $tail = shift; |
| |
my $client = shift; |
| |
|
| |
my $userinput = "$command:$tail"; |
| |
|
| |
my $cert = GetCertificate($userinput); |
| |
if(ValidManager($cert)) { |
| |
my($filetype, $script) = split(/:/, $tail); |
| |
if (($filetype eq "hosts") || |
| |
($filetype eq "domain")) { |
| |
if($script ne "") { |
| |
Reply($client, # BUGBUG - EditFile |
| |
EditFile($userinput), # could fail. |
| |
$userinput); |
| |
} else { |
| |
Failure($client,"refused\n",$userinput); |
| |
} |
| |
} else { |
| |
Failure($client,"refused\n",$userinput); |
| |
} |
| |
} else { |
| |
Failure($client,"refused\n",$userinput); |
| |
} |
| |
return 1; |
| |
} |
| |
RegisterHandler("edit", \&EditTableHandler, 1, 0, 1); |
| |
|
| |
|
| |
# |
| |
# Authenticate a user against the LonCAPA authentication |
| |
# database. Note that there are several authentication |
| |
# possibilities: |
| |
# - unix - The user can be authenticated against the unix |
| |
# password file. |
| |
# - internal - The user can be authenticated against a purely |
| |
# internal per user password file. |
| |
# - kerberos - The user can be authenticated against either a kerb4 or kerb5 |
| |
# ticket granting authority. |
| |
# - user - The person tailoring LonCAPA can supply a user authentication |
| |
# mechanism that is per system. |
| |
# |
| |
# Parameters: |
| |
# $cmd - The command that got us here. |
| |
# $tail - Tail of the command (remaining parameters). |
| |
# $client - File descriptor connected to client. |
| |
# Returns |
| |
# 0 - Requested to exit, caller should shut down. |
| |
# 1 - Continue processing. |
| |
# Implicit inputs: |
| |
# The authentication systems describe above have their own forms of implicit |
| |
# input into the authentication process that are described above. |
| |
# |
| |
sub AuthenticateHandler { |
| |
my $cmd = shift; |
| |
my $tail = shift; |
| |
my $client = shift; |
| |
|
| |
# Regenerate the full input line |
| |
|
| |
my $userinput = $cmd.":".$tail; |
| |
|
| |
# udom - User's domain. |
| |
# uname - Username. |
| |
# upass - User's password. |
| |
|
| |
my ($udom,$uname,$upass)=split(/:/,$tail); |
| |
Debug(" Authenticate domain = $udom, user = $uname, password = $upass"); |
| |
chomp($upass); |
| |
$upass=unescape($upass); |
| |
|
| |
my $pwdcorrect = ValidateUser($udom, $uname, $upass); |
| |
if($pwdcorrect) { |
| |
Reply( $client, "authorized\n", $userinput); |
| |
# |
| |
# Bad credentials: Failed to authorize |
| |
# |
| |
} else { |
| |
Failure( $client, "non_authorized\n", $userinput); |
| |
} |
| |
|
| |
return 1; |
| |
} |
| |
RegisterHandler("auth", \&AuthenticateHandler, 1, 1, 0); |
| |
|
| |
# |
| |
# Change a user's password. Note that this function is complicated by |
| |
# the fact that a user may be authenticated in more than one way: |
| |
# At present, we are not able to change the password for all types of |
| |
# authentication methods. Only for: |
| |
# unix - unix password or shadow passoword style authentication. |
| |
# local - Locally written authentication mechanism. |
| |
# For now, kerb4 and kerb5 password changes are not supported and result |
| |
# in an error. |
| |
# FUTURE WORK: |
| |
# Support kerberos passwd changes? |
| |
# Parameters: |
| |
# $cmd - The command that got us here. |
| |
# $tail - Tail of the command (remaining parameters). |
| |
# $client - File descriptor connected to client. |
| |
# Returns |
| |
# 0 - Requested to exit, caller should shut down. |
| |
# 1 - Continue processing. |
| |
# Implicit inputs: |
| |
# The authentication systems describe above have their own forms of implicit |
| |
# input into the authentication process that are described above. |
| |
sub ChangePasswordHandler { |
| |
my $cmd = shift; |
| |
my $tail = shift; |
| |
my $client = shift; |
| |
|
| |
my $userinput = $cmd.":".$tail; # Reconstruct client's string. |
| |
|
| |
# |
| |
# udom - user's domain. |
| |
# uname - Username. |
| |
# upass - Current password. |
| |
# npass - New password. |
| |
|
| |
my ($udom,$uname,$upass,$npass)=split(/:/,$tail); |
| |
chomp($npass); |
| |
$upass=&unescape($upass); |
| |
$npass=&unescape($npass); |
| |
&Debug("Trying to change password for $uname"); |
| |
|
| |
# First require that the user can be authenticated with their |
| |
# old password: |
| |
|
| |
my $validated = ValidateUser($udom, $uname, $upass); |
| |
if($validated) { |
| |
my $realpasswd = GetAuthType($udom, $uname); # Defined since authd. |
| |
|
| |
my ($howpwd,$contentpwd)=split(/:/,$realpasswd); |
| |
if ($howpwd eq 'internal') { |
| |
&Debug("internal auth"); |
| |
my $salt=time; |
| |
$salt=substr($salt,6,2); |
| |
my $ncpass=crypt($npass,$salt); |
| |
if(RewritePwFile($udom, $uname, "internal:$ncpass")) { |
| |
&logthis("Result of password change for " |
| |
."$uname: pwchange_success"); |
| |
Reply($client, "ok\n", $userinput); |
| |
} else { |
| |
&logthis("Unable to open $uname passwd " |
| |
."to change password"); |
| |
Failure( $client, "non_authorized\n",$userinput); |
| |
} |
| |
} elsif ($howpwd eq 'unix') { |
| |
# Unix means we have to access /etc/password |
| |
&Debug("auth is unix"); |
| |
my $execdir=$perlvar{'lonDaemons'}; |
| |
&Debug("Opening lcpasswd pipeline"); |
| |
my $pf = IO::File->new("|$execdir/lcpasswd > " |
| |
."$perlvar{'lonDaemons'}" |
| |
."/logs/lcpasswd.log"); |
| |
print $pf "$uname\n$npass\n$npass\n"; |
| |
close $pf; |
| |
my $err = $?; |
| |
my $result = ($err>0 ? 'pwchange_failure' : 'ok'); |
| |
&logthis("Result of password change for $uname: ". |
| |
&lcpasswdstrerror($?)); |
| |
Reply($client, "$result\n", $userinput); |
| |
} else { |
| |
# this just means that the current password mode is not |
| |
# one we know how to change (e.g the kerberos auth modes or |
| |
# locally written auth handler). |
| |
# |
| |
Reply( $client, "auth_mode_error\n", $userinput); |
| |
} |
| |
|
| |
} |
| |
else { |
| |
Reply( $client, "non_authorized\n", $userinput); |
| |
} |
| |
|
| |
return 1; |
| |
} |
| |
RegisterHandler("passwd", \&ChangePasswordHandler, 1, 1, 0); |
| |
|
| |
# |
| |
# Create a new user. User in this case means a lon-capa user. |
| |
# The user must either already exist in some authentication realm |
| |
# like kerberos or the /etc/passwd. If not, a user completely local to |
| |
# this loncapa system is created. |
| |
# |
| |
# Parameters: |
| |
# $cmd - The command that got us here. |
| |
# $tail - Tail of the command (remaining parameters). |
| |
# $client - File descriptor connected to client. |
| |
# Returns |
| |
# 0 - Requested to exit, caller should shut down. |
| |
# 1 - Continue processing. |
| |
# Implicit inputs: |
| |
# The authentication systems describe above have their own forms of implicit |
| |
# input into the authentication process that are described above. |
| |
sub AddUserHandler { |
| |
my $cmd = shift; |
| |
my $tail = shift; |
| |
my $client = shift; |
| |
|
| |
my ($udom,$uname,$umode,$npass)=split(/:/,$tail); |
| |
my $userinput = $cmd.":".$tail; # Reconstruct the full request line. |
| |
|
| |
&Debug("cmd =".$cmd." $udom =".$udom." uname=".$uname); |
| |
|
| |
|
| |
if($udom eq $currentdomainid) { # Reject new users for other domains... |
| |
|
| |
my $oldumask=umask(0077); |
| |
chomp($npass); |
| |
$npass=&unescape($npass); |
| |
my $passfilename = PasswordPath($udom, $uname); |
| |
&Debug("Password file created will be:".$passfilename); |
| |
if (-e $passfilename) { |
| |
Failure( $client, "already_exists\n", $userinput); |
| |
} else { |
| |
my @fpparts=split(/\//,$passfilename); |
| |
my $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2]; |
| |
my $fperror=''; |
| |
for (my $i=3;$i<= ($#fpparts-1);$i++) { |
| |
$fpnow.='/'.$fpparts[$i]; |
| |
unless (-e $fpnow) { |
| |
&logthis("mkdir $fpnow"); |
| |
unless (mkdir($fpnow,0777)) { |
| |
$fperror="error: ".($!+0)." mkdir failed while attempting " |
| |
."makeuser"; |
| |
} |
| |
} |
| |
} |
| |
unless ($fperror) { |
| |
my $result=&make_passwd_file($uname, $umode,$npass, $passfilename); |
| |
Reply($client, $result, $userinput); #BUGBUG - could be fail |
| |
} else { |
| |
Failure($client, "$fperror\n", $userinput); |
| |
} |
| |
} |
| |
umask($oldumask); |
| |
} else { |
| |
Failure($client, "not_right_domain\n", |
| |
$userinput); # Even if we are multihomed. |
| |
|
| |
} |
| |
return 1; |
| |
|
| |
} |
| |
RegisterHandler("makeuser", \&AddUserHandler, 1, 1, 0); |
| |
|
| |
# |
| |
# Change the authentication method of a user. Note that this may |
| |
# also implicitly change the user's password if, for example, the user is |
| |
# joining an existing authentication realm. Known authentication realms at |
| |
# this time are: |
| |
# internal - Purely internal password file (only loncapa knows this user) |
| |
# local - Institutionally written authentication module. |
| |
# unix - Unix user (/etc/passwd with or without /etc/shadow). |
| |
# kerb4 - kerberos version 4 |
| |
# kerb5 - kerberos version 5 |
| |
# |
| |
# Parameters: |
| |
# $cmd - The command that got us here. |
| |
# $tail - Tail of the command (remaining parameters). |
| |
# $client - File descriptor connected to client. |
| |
# Returns |
| |
# 0 - Requested to exit, caller should shut down. |
| |
# 1 - Continue processing. |
| |
# Implicit inputs: |
| |
# The authentication systems describe above have their own forms of implicit |
| |
# input into the authentication process that are described above. |
| |
# |
| |
sub ChangeAuthenticationHandler { |
| |
my $cmd = shift; |
| |
my $tail = shift; |
| |
my $client = shift; |
| |
|
| |
my $userinput = "$cmd:$tail"; # Reconstruct user input. |
| |
|
| |
my ($udom,$uname,$umode,$npass)=split(/:/,$tail); |
| |
&Debug("cmd = ".$cmd." domain= ".$udom."uname =".$uname." umode= ".$umode); |
| |
if ($udom ne $currentdomainid) { |
| |
Failure( $client, "not_right_domain\n", $client); |
| |
} else { |
| |
|
| |
chomp($npass); |
| |
|
| |
$npass=&unescape($npass); |
| |
my $passfilename = PasswordPath($udom, $uname); |
| |
if ($passfilename) { # Not allowed to create a new user!! |
| |
my $result=&make_passwd_file($uname, $umode,$npass,$passfilename); |
| |
Reply($client, $result, $userinput); |
| |
} else { |
| |
Failure($client, "non_authorized", $userinput); # Fail the user now. |
| |
} |
| |
} |
| |
return 1; |
| |
} |
| |
RegisterHandler("changeuserauth", \&ChangeAuthenticationHandler, 1,1, 0); |
| |
|
| |
# |
| |
# Determines if this is the home server for a user. The home server |
| |
# for a user will have his/her lon-capa passwd file. Therefore all we need |
| |
# to do is determine if this file exists. |
| |
# |
| |
# Parameters: |
| |
# $cmd - The command that got us here. |
| |
# $tail - Tail of the command (remaining parameters). |
| |
# $client - File descriptor connected to client. |
| |
# Returns |
| |
# 0 - Requested to exit, caller should shut down. |
| |
# 1 - Continue processing. |
| |
# Implicit inputs: |
| |
# The authentication systems describe above have their own forms of implicit |
| |
# input into the authentication process that are described above. |
| |
# |
| |
sub IsHomeHandler { |
| |
my $cmd = shift; |
| |
my $tail = shift; |
| |
my $client = shift; |
| |
|
| |
my $userinput = "$cmd:$tail"; |
| |
|
| |
my ($udom,$uname)=split(/:/,$tail); |
| |
chomp($uname); |
| |
my $passfile = PasswordFilename($udom, $uname); |
| |
if($passfile) { |
| |
Reply( $client, "found\n", $userinput); |
| |
} else { |
| |
Failure($client, "not_found\n", $userinput); |
| |
} |
| |
return 1; |
| |
} |
| |
RegisterHandler("home", \&IsHomeHandler, 0,1,0); |
| |
# |
| |
# Process an update request for a resource?? I think what's going on here is |
| |
# that a resource has been modified that we hold a subscription to. |
| |
# If the resource is not local, then we must update, or at least invalidate our |
| |
# cached copy of the resource. |
| |
# FUTURE WORK: |
| |
# I need to look at this logic carefully. My druthers would be to follow |
| |
# typical caching logic, and simple invalidate the cache, drop any subscription |
| |
# an let the next fetch start the ball rolling again... however that may |
| |
# actually be more difficult than it looks given the complex web of |
| |
# proxy servers. |
| |
# Parameters: |
| |
# $cmd - The command that got us here. |
| |
# $tail - Tail of the command (remaining parameters). |
| |
# $client - File descriptor connected to client. |
| |
# Returns |
| |
# 0 - Requested to exit, caller should shut down. |
| |
# 1 - Continue processing. |
| |
# Implicit inputs: |
| |
# The authentication systems describe above have their own forms of implicit |
| |
# input into the authentication process that are described above. |
| |
# |
| |
sub UpdateResourceHandler { |
| |
my $cmd = shift; |
| |
my $tail = shift; |
| |
my $client = shift; |
| |
|
| |
my $userinput = "$cmd:$tail"; |
| |
|
| |
my $fname=$tail; |
| |
my $ownership=ishome($fname); |
| |
if ($ownership eq 'not_owner') { |
| |
if (-e $fname) { |
| |
my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size, |
| |
$atime,$mtime,$ctime,$blksize,$blocks)=stat($fname); |
| |
my $now=time; |
| |
my $since=$now-$atime; |
| |
if ($since>$perlvar{'lonExpire'}) { |
| |
my $reply=&reply("unsub:$fname","$clientname"); |
| |
unlink("$fname"); |
| |
} else { |
| |
my $transname="$fname.in.transfer"; |
| |
my $remoteurl=&reply("sub:$fname","$clientname"); |
| |
my $response; |
| |
alarm(120); |
| |
{ |
| |
my $ua=new LWP::UserAgent; |
| |
my $request=new HTTP::Request('GET',"$remoteurl"); |
| |
$response=$ua->request($request,$transname); |
| |
} |
| |
alarm(0); |
| |
if ($response->is_error()) { |
| |
unlink($transname); |
| |
my $message=$response->status_line; |
| |
&logthis("LWP GET: $message for $fname ($remoteurl)"); |
| |
} else { |
| |
if ($remoteurl!~/\.meta$/) { |
| |
alarm(120); |
| |
{ |
| |
my $ua=new LWP::UserAgent; |
| |
my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta'); |
| |
my $mresponse=$ua->request($mrequest,$fname.'.meta'); |
| |
if ($mresponse->is_error()) { |
| |
unlink($fname.'.meta'); |
| |
} |
| |
} |
| |
alarm(0); |
| |
} |
| |
rename($transname,$fname); |
| |
} |
| |
} |
| |
Reply( $client, "ok\n", $userinput); |
| |
} else { |
| |
Failure($client, "not_found\n", $userinput); |
| |
} |
| |
} else { |
| |
Failure($client, "rejected\n", $userinput); |
| |
} |
| |
return 1; |
| |
} |
| |
RegisterHandler("update", \&UpdateResourceHandler, 0 ,1, 0); |
| |
|
| |
# |
| |
# Fetch a user file from a remote server: |
| |
# Parameters: |
| |
# $cmd - The command that got us here. |
| |
# $tail - Tail of the command (remaining parameters). |
| |
# $client - File descriptor connected to client. |
| |
# Returns |
| |
# 0 - Requested to exit, caller should shut down. |
| |
# 1 - Continue processing. |
| |
# |
| |
sub FetchUserFileHandler { |
| |
my $cmd = shift; |
| |
my $tail = shift; |
| |
my $client = shift; |
| |
|
| |
my $userinput = "$cmd:$tail"; |
| |
my $fname = $tail; |
| |
my ($udom,$uname,$ufile)=split(/\//,$fname); |
| |
my $udir=propath($udom,$uname).'/userfiles'; |
| |
unless (-e $udir) { |
| |
mkdir($udir,0770); |
| |
} |
| |
if (-e $udir) { |
| |
$ufile=~s/^[\.\~]+//; |
| |
$ufile=~s/\///g; |
| |
my $destname=$udir.'/'.$ufile; |
| |
my $transname=$udir.'/'.$ufile.'.in.transit'; |
| |
my $remoteurl='http://'.$clientip.'/userfiles/'.$fname; |
| |
my $response; |
| |
alarm(120); |
| |
{ |
| |
my $ua=new LWP::UserAgent; |
| |
my $request=new HTTP::Request('GET',"$remoteurl"); |
| |
$response=$ua->request($request,$transname); |
| |
} |
| |
alarm(0); |
| |
if ($response->is_error()) { |
| |
unlink($transname); |
| |
my $message=$response->status_line; |
| |
&logthis("LWP GET: $message for $fname ($remoteurl)"); |
| |
Failure($client, "failed\n", $userinput); |
| |
} else { |
| |
if (!rename($transname,$destname)) { |
| |
&logthis("Unable to move $transname to $destname"); |
| |
unlink($transname); |
| |
Failure($client, "failed\n", $userinput); |
| |
} else { |
| |
Reply($client, "ok\n", $userinput); |
| |
} |
| |
} |
| |
} else { |
| |
Failure($client, "not_home\n", $userinput); |
| |
} |
| |
return 1; |
| |
} |
| |
RegisterHandler("fetchuserfile", \&FetchUserFileHandler, 0, 1, 0); |
| |
# |
| |
# Authenticate access to a user file. |
| |
# |
| |
# Parameters: |
| |
# $cmd - The command that got us here. |
| |
# $tail - Tail of the command (remaining parameters). |
| |
# $client - File descriptor connected to client. |
| |
# Returns |
| |
# 0 - Requested to exit, caller should shut down. |
| |
# 1 - Continue processing. |
| |
sub AuthenticateUserFileAccess { |
| |
my $cmd = shift; |
| |
my $tail = shift; |
| |
my $client = shift; |
| |
my $userinput = "$cmd:$tail"; |
| |
|
| |
my ($fname,$session)=split(/:/,$tail); |
| |
chomp($session); |
| |
my $reply='non_auth'; |
| |
if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.$session.'.id')) { |
| |
while (my $line=<ENVIN>) { |
| |
if ($line=~/userfile\.$fname\=/) { |
| |
$reply='ok'; |
| |
} |
| |
} |
| |
close(ENVIN); |
| |
Reply($client, $reply."\n", $userinput); |
| |
} else { |
| |
Failure($client, "invalid_token\n", $userinput); |
| |
} |
| |
return 1; |
| |
|
| |
} |
| |
RegisterHandler("tokenauthuserfile", \&AuthenticateUserFileAccess, 0, 1, 0); |
| |
# |
| |
# Unsubscribe from a resource. |
| |
# |
| |
# Parameters: |
| |
# $cmd - The command that got us here. |
| |
# $tail - Tail of the command (remaining parameters). |
| |
# $client - File descriptor connected to client. |
| |
# Returns |
| |
# 0 - Requested to exit, caller should shut down. |
| |
# 1 - Continue processing. |
| |
# |
| |
sub UnsubscribeHandler { |
| |
my $cmd = shift; |
| |
my $tail = shift; |
| |
my $client = shift; |
| |
my $userinput= "$cmd:$tail"; |
| |
|
| |
my $fname = $tail; |
| |
if (-e $fname) { |
| |
Reply($client, &unsub($client,$fname,$clientip), $userinput); |
| |
} else { |
| |
Failure($client, "not_found\n", $userinput); |
| |
} |
| |
return 1; |
| |
} |
| |
RegisterHandler("unusb", \&UnsubscribeHandler, 0, 1, 0); |
| |
|
| |
# Subscribe to a resource |
| |
# |
| |
# Parameters: |
| |
# $cmd - The command that got us here. |
| |
# $tail - Tail of the command (remaining parameters). |
| |
# $client - File descriptor connected to client. |
| |
# Returns |
| |
# 0 - Requested to exit, caller should shut down. |
| |
# 1 - Continue processing. |
| |
# |
| |
sub SubscribeHandler { |
| |
my $cmd = shift; |
| |
my $tail = shift; |
| |
my $client = shift; |
| |
my $userinput = "$cmd:$tail"; |
| |
|
| |
Reply( $client, &subscribe($userinput,$clientip), $userinput); |
| |
|
| |
return 1; |
| |
} |
| |
RegisterHandler("sub", \&SubscribeHandler, 0, 1, 0); |
| |
|
| |
# |
| |
# Determine the version of a resource (?) Or is it return |
| |
# the top version of the resource? Not yet clear from the |
| |
# code in currentversion. |
| |
# |
| |
# Parameters: |
| |
# $cmd - The command that got us here. |
| |
# $tail - Tail of the command (remaining parameters). |
| |
# $client - File descriptor connected to client. |
| |
# Returns |
| |
# 0 - Requested to exit, caller should shut down. |
| |
# 1 - Continue processing. |
| |
# |
| |
sub CurrentVersionHandler { |
| |
my $cmd = shift; |
| |
my $tail = shift; |
| |
my $client = shift; |
| |
my $userinput= "$cmd:$tail"; |
| |
|
| |
my $fname = $tail; |
| |
Reply( $client, ¤tversion($fname)."\n", $userinput); |
| |
return 1; |
| |
|
| |
} |
| |
RegisterHandler("currentversion", \&CurrentVersionHandler, 0, 1, 0); |
| |
|
| |
|
| |
# Make an entry in a user's activity log. |
| |
# |
| |
# Parameters: |
| |
# $cmd - The command that got us here. |
| |
# $tail - Tail of the command (remaining parameters). |
| |
# $client - File descriptor connected to client. |
| |
# Returns |
| |
# 0 - Requested to exit, caller should shut down. |
| |
# 1 - Continue processing. |
| |
# |
| |
sub ActivityLogEntryHandler { |
| |
my $cmd = shift; |
| |
my $tail = shift; |
| |
my $client = shift; |
| |
my $userinput= "$cmd:$tail"; |
| |
|
| |
my ($udom,$uname,$what)=split(/:/,$tail); |
| |
chomp($what); |
| |
my $proname=propath($udom,$uname); |
| |
my $now=time; |
| |
my $hfh; |
| |
if ($hfh=IO::File->new(">>$proname/activity.log")) { |
| |
print $hfh "$now:$clientname:$what\n"; |
| |
Reply( $client, "ok\n", $userinput); |
| |
} else { |
| |
Failure($client, "error: ".($!+0)." IO::File->new Failed " |
| |
."while attempting log\n", |
| |
$userinput); |
| |
} |
| |
|
| |
return 1; |
| |
} |
| |
RegisterHandler("log", \&ActivityLogEntryHandler, 0, 1, 0); |
| |
# |
| |
# Put a namespace entry in a user profile hash. |
| |
# My druthers would be for this to be an encrypted interaction too. |
| |
# anything that might be an inadvertent covert channel about either |
| |
# user authentication or user personal information.... |
| |
# |
| |
# Parameters: |
| |
# $cmd - The command that got us here. |
| |
# $tail - Tail of the command (remaining parameters). |
| |
# $client - File descriptor connected to client. |
| |
# Returns |
| |
# 0 - Requested to exit, caller should shut down. |
| |
# 1 - Continue processing. |
| |
# |
| |
sub PutUserProfileEntry { |
| |
my $cmd = shift; |
| |
my $tail = shift; |
| |
my $client = shift; |
| |
my $userinput = "$cmd:$tail"; |
| |
|
| |
my ($udom,$uname,$namespace,$what) =split(/:/,$tail); |
| |
if ($namespace ne 'roles') { |
| |
chomp($what); |
| |
my $hashref = TieUserHash($udom, $uname, $namespace, |
| |
&GDBM_WRCREAT(),"P",$what); |
| |
if($hashref) { |
| |
my @pairs=split(/\&/,$what); |
| |
foreach my $pair (@pairs) { |
| |
my ($key,$value)=split(/=/,$pair); |
| |
$hashref->{$key}=$value; |
| |
} |
| |
if (untie(%$hashref)) { |
| |
Reply( $client, "ok\n", $userinput); |
| |
} else { |
| |
Failure($client, "error: ".($!+0)." untie(GDBM) failed ". |
| |
"while attempting put\n", |
| |
$userinput); |
| |
} |
| |
} else { |
| |
Failure( $client, "error: ".($!)." tie(GDBM) Failed ". |
| |
"while attempting put\n", $userinput); |
| |
} |
| |
} else { |
| |
Failure( $client, "refused\n", $userinput); |
| |
} |
| |
|
| |
return 1; |
| |
} |
| |
RegisterHandler("put", \&PutUserProfileEntry, 0, 1, 0); |
| |
|
| |
# |
| |
# Increment a profile entry in the user history file. |
| |
# The history contains keyword value pairs. In this case, |
| |
# The value itself is a pair of numbers. The first, the current value |
| |
# the second an increment that this function applies to the current |
| |
# value. |
| |
# |
| |
# Parameters: |
| |
# $cmd - The command that got us here. |
| |
# $tail - Tail of the command (remaining parameters). |
| |
# $client - File descriptor connected to client. |
| |
# Returns |
| |
# 0 - Requested to exit, caller should shut down. |
| |
# 1 - Continue processing. |
| |
# |
| |
sub IncrementUserValueHandler { |
| |
my $cmd = shift; |
| |
my $tail = shift; |
| |
my $client = shift; |
| |
my $userinput = "$cmd:$tail"; |
| |
|
| |
my ($udom,$uname,$namespace,$what) =split(/:/,$tail); |
| |
if ($namespace ne 'roles') { |
| |
chomp($what); |
| |
my $hashref = TieUserHash($udom, $uname, |
| |
$namespace, &GDBM_WRCREAT(), |
| |
"P",$what); |
| |
if ($hashref) { |
| |
my @pairs=split(/\&/,$what); |
| |
foreach my $pair (@pairs) { |
| |
my ($key,$value)=split(/=/,$pair); |
| |
# We could check that we have a number... |
| |
if (! defined($value) || $value eq '') { |
| |
$value = 1; |
| |
} |
| |
$hashref->{$key}+=$value; |
| |
} |
| |
if (untie(%$hashref)) { |
| |
Reply( $client, "ok\n", $userinput); |
| |
} else { |
| |
Failure($client, "error: ".($!+0)." untie(GDBM) failed ". |
| |
"while attempting inc\n", $userinput); |
| |
} |
| |
} else { |
| |
Failure($client, "error: ".($!+0)." tie(GDBM) Failed ". |
| |
"while attempting inc\n", $userinput); |
| |
} |
| |
} else { |
| |
Failure($client, "refused\n", $userinput); |
| |
} |
| |
|
| |
return 1; |
| |
} |
| |
RegisterHandler("inc", \&IncrementUserValueHandler, 0, 1, 0); |
| |
# |
| |
# Put a new role for a user. Roles are LonCAPA's packaging of permissions. |
| |
# Each 'role' a user has implies a set of permissions. Adding a new role |
| |
# for a person grants the permissions packaged with that role |
| |
# to that user when the role is selected. |
| |
# |
| |
# Parameters: |
| |
# $cmd - The command string (rolesput). |
| |
# $tail - The remainder of the request line. For rolesput this |
| |
# consists of a colon separated list that contains: |
| |
# The domain and user that is granting the role (logged). |
| |
# The domain and user that is getting the role. |
| |
# The roles being granted as a set of & separated pairs. |
| |
# each pair a key value pair. |
| |
# $client - File descriptor connected to the client. |
| |
# Returns: |
| |
# 0 - If the daemon should exit |
| |
# 1 - To continue processing. |
| |
# |
| |
# |
| |
sub RolesPutHandler { |
| |
my $cmd = shift; |
| |
my $tail = shift; |
| |
my $client = shift; |
| |
my $userinput = "$cmd:$tail"; |
| |
|
| |
my ($exedom,$exeuser,$udom,$uname,$what) =split(/:/,$tail); |
| |
&Debug("cmd = ".$cmd." exedom= ".$exedom."user = ".$exeuser." udom=".$udom. |
| |
"what = ".$what); |
| |
my $namespace='roles'; |
| |
chomp($what); |
| |
my $hashref = TieUserHash($udom, $uname, $namespace, |
| |
&GDBM_WRCREAT(), "P", |
| |
"$exedom:$exeuser:$what"); |
| |
# |
| |
# Log the attempt to set a role. The {}'s here ensure that the file |
| |
# handle is open for the minimal amount of time. Since the flush |
| |
# is done on close this improves the chances the log will be an un- |
| |
# corrupted ordered thing. |
| |
if ($hashref) { |
| |
my @pairs=split(/\&/,$what); |
| |
foreach my $pair (@pairs) { |
| |
my ($key,$value)=split(/=/,$pair); |
| |
&ManagePermissions($key, $udom, $uname, |
| |
&GetAuthType( $udom, $uname)); |
| |
$hashref->{$key}=$value; |
| |
} |
| |
if (untie($hashref)) { |
| |
Reply($client, "ok\n", $userinput); |
| |
} else { |
| |
Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ". |
| |
"while attempting rolesput\n", $userinput); |
| |
} |
| |
} else { |
| |
Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ". |
| |
"while attempting rolesput\n", $userinput); |
| |
} |
| |
return 1; |
| |
} |
| |
RegisterHandler("rolesput", \&RolesPutHandler, 1,1,0); # Encoded client only. |
| |
# |
| |
# Deletes (removes) a role for a user. This is equivalent to removing |
| |
# a permissions package associated with the role from the user's profile. |
| |
# |
| |
# Parameters: |
| |
# $cmd - The command (rolesdel) |
| |
# $tail - The remainder of the request line. This consists |
| |
# of: |
| |
# The domain and user requesting the change (logged) |
| |
# The domain and user being changed. |
| |
# The roles being revoked. These are shipped to us |
| |
# as a bunch of & separated role name keywords. |
| |
# $client - The file handle open on the client. |
| |
# Returns: |
| |
# 1 - Continue processing |
| |
# 0 - Exit. |
| |
# |
| |
sub RolesDeleteHandler { |
| |
my $cmd = shift; |
| |
my $tail = shift; |
| |
my $client = shift; |
| |
my $userinput = "$cmd:$tail"; |
| |
|
| |
my ($exedom,$exeuser,$udom,$uname,$what)=split(/:/,$tail); |
| |
&Debug("cmd = ".$cmd." exedom= ".$exedom."user = ".$exeuser." udom=".$udom. |
| |
"what = ".$what); |
| |
my $namespace='roles'; |
| |
chomp($what); |
| |
my $hashref = TieUserHash($udom, $uname, $namespace, |
| |
&GDBM_WRCREAT(), "D", |
| |
"$exedom:$exeuser:$what"); |
| |
|
| |
if ($hashref) { |
| |
my @rolekeys=split(/\&/,$what); |
| |
|
| |
foreach my $key (@rolekeys) { |
| |
delete $hashref->{$key}; |
| |
} |
| |
if (untie(%$hashref)) { |
| |
Reply($client, "ok\n", $userinput); |
| |
} else { |
| |
Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ". |
| |
"while attempting rolesdel\n", $userinput); |
| |
} |
| |
} else { |
| |
Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ". |
| |
"while attempting rolesdel\n", $userinput); |
| |
} |
| |
|
| |
return 1; |
| |
} |
| |
RegisterHandler("rolesdel", \&RolesDeleteHandler, 1,1, 0); # Encoded client only |
| |
|
| |
# Unencrypted get from a user's profile database. See |
| |
# GetProfileEntryEncrypted for a version that does end-to-end encryption. |
| |
# This function retrieves a keyed item from a specific named database in the |
| |
# user's directory. |
| |
# |
| |
# Parameters: |
| |
# $cmd - Command request keyword (get). |
| |
# $tail - Tail of the command. This is a colon separated list |
| |
# consisting of the domain and username that uniquely |
| |
# identifies the profile, |
| |
# The 'namespace' which selects the gdbm file to |
| |
# do the lookup in, |
| |
# & separated list of keys to lookup. Note that |
| |
# the values are returned as an & separated list too. |
| |
# $client - File descriptor open on the client. |
| |
# Returns: |
| |
# 1 - Continue processing. |
| |
# 0 - Exit. |
| |
# |
| |
sub GetProfileEntry { |
| |
my $cmd = shift; |
| |
my $tail = shift; |
| |
my $client = shift; |
| |
my $userinput= "$cmd:$tail"; |
| |
|
| |
my ($udom,$uname,$namespace,$what) = split(/:/,$tail); |
| |
chomp($what); |
| |
my $hashref = TieUserHash($udom, $uname, $namespace, |
| |
&GDBM_READER()); |
| |
if ($hashref) { |
| |
my @queries=split(/\&/,$what); |
| |
my $qresult=''; |
| |
|
| |
for (my $i=0;$i<=$#queries;$i++) { |
| |
$qresult.="$hashref->{$queries[$i]}&"; # Presumably failure gives empty string. |
| |
} |
| |
$qresult=~s/\&$//; # Remove trailing & from last lookup. |
| |
if (untie(%$hashref)) { |
| |
Reply($client, "$qresult\n", $userinput); |
| |
} else { |
| |
Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". |
| |
"while attempting get\n", $userinput); |
| |
} |
| |
} else { |
| |
if ($!+0 == 2) { # +0 coerces errno -> number 2 is ENOENT |
| |
Failure($client, "error:No such file or ". |
| |
"GDBM reported bad block error\n", $userinput); |
| |
} else { # Some other undifferentiated err. |
| |
Failure($client, "error: ".($!+0)." tie(GDBM) Failed ". |
| |
"while attempting get\n", $userinput); |
| |
} |
| |
} |
| |
return 1; |
| |
} |
| |
RegisterHandler("get", \&GetProfileEntry, 0,1,0); |
| |
# |
| |
# Process the encrypted get request. Note that the request is sent |
| |
# in clear, but the reply is encrypted. This is a small covert channel: |
| |
# information about the sensitive keys is given to the snooper. Just not |
| |
# information about the values of the sensitive key. Hmm if I wanted to |
| |
# know these I'd snoop for the egets. Get the profile item names from them |
| |
# and then issue a get for them since there's no enforcement of the |
| |
# requirement of an encrypted get for particular profile items. If I |
| |
# were re-doing this, I'd force the request to be encrypted as well as the |
| |
# reply. I'd also just enforce encrypted transactions for all gets since |
| |
# that would prevent any covert channel snooping. |
| |
# |
| |
# Parameters: |
| |
# $cmd - Command keyword of request (eget). |
| |
# $tail - Tail of the command. See GetProfileEntry
# for more information about this. |
| |
# $client - File open on the client. |
| |
# Returns: |
| |
# 1 - Continue processing |
| |
# 0 - server should exit. |
| |
sub GetProfileEntryEncrypted { |
| |
my $cmd = shift; |
| |
my $tail = shift; |
| |
my $client = shift; |
| |
my $userinput = "$cmd:$tail"; |
| |
|
| |
my ($cmd,$udom,$uname,$namespace,$what) = split(/:/,$userinput); |
| |
chomp($what); |
| |
my $hashref = TieUserHash($udom, $uname, $namespace, |
| |
&GDBM_READER()); |
| |
if ($hashref) { |
| |
my @queries=split(/\&/,$what); |
| |
my $qresult=''; |
| |
for (my $i=0;$i<=$#queries;$i++) { |
| |
$qresult.="$hashref->{$queries[$i]}&"; |
| |
} |
| |
if (untie(%$hashref)) { |
| |
$qresult=~s/\&$//; |
| |
if ($cipher) { |
| |
my $cmdlength=length($qresult); |
| |
$qresult.=" "; |
| |
my $encqresult=''; |
| |
for(my $encidx=0;$encidx<=$cmdlength;$encidx+=8) { |
| |
$encqresult.= unpack("H16", |
| |
$cipher->encrypt(substr($qresult, |
| |
$encidx, |
| |
8))); |
| |
} |
| |
Reply( $client, "enc:$cmdlength:$encqresult\n", $userinput); |
| |
} else { |
| |
Failure( $client, "error:no_key\n", $userinput); |
| |
} |
| |
} else { |
| |
Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". |
| |
"while attempting eget\n", $userinput); |
| |
} |
| |
} else { |
| |
Failure($client, "error: ".($!+0)." tie(GDBM) Failed ". |
| |
"while attempting eget\n", $userinput); |
| |
} |
| |
|
| |
return 1; |
| |
} |
| |
RegisterHandler("eget", \&GetProfileEntryEncrypted, 0, 1, 0); |
| |
|
| |
# |
| |
# Deletes a key in a user profile database. |
| |
# |
| |
# Parameters: |
| |
# $cmd - Command keyword (del). |
| |
# $tail - Command tail. IN this case a colon |
| |
# separated list containing: |
| |
# The domain and user that identifies uniquely |
| |
# the identity of the user. |
| |
# The profile namespace (name of the profile |
| |
# database file). |
| |
# & separated list of keywords to delete. |
| |
# $client - File open on client socket. |
| |
# Returns: |
| |
# 1 - Continue processing |
| |
# 0 - Exit server. |
| |
# |
| |
# |
| |
|
| |
sub DeleteProfileEntry { |
| |
my $cmd = shift; |
| |
my $tail = shift; |
| |
my $client = shift; |
| |
my $userinput = "cmd:$tail"; |
| |
|
| |
my ($udom,$uname,$namespace,$what) = split(/:/,$tail); |
| |
chomp($what); |
| |
my $hashref = TieUserHash($udom, $uname, $namespace, |
| |
&GDBM_WRCREAT(), |
| |
"D",$what); |
| |
if ($hashref) { |
| |
my @keys=split(/\&/,$what); |
| |
foreach my $key (@keys) { |
| |
delete($hashref->{$key}); |
| |
} |
| |
if (untie(%$hashref)) { |
| |
Reply($client, "ok\n", $userinput); |
| |
} else { |
| |
Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". |
| |
"while attempting del\n", $userinput); |
| |
} |
| |
} else { |
| |
Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ". |
| |
"while attempting del\n", $userinput); |
| |
} |
| |
return 1; |
| |
} |
| |
RegisterHandler("del", \&DeleteProfileEntry, 0, 1, 0); |
| |
# |
| |
# List the set of keys that are defined in a profile database file. |
| |
# A successful reply from this will contain an & separated list of |
| |
# the keys. |
| |
# Parameters: |
| |
# $cmd - Command request (keys). |
| |
# $tail - Remainder of the request, a colon separated |
| |
# list containing domain/user that identifies the |
| |
# user being queried, and the database namespace |
| |
# (database filename essentially). |
| |
# $client - File open on the client. |
| |
# Returns: |
| |
# 1 - Continue processing. |
| |
# 0 - Exit the server. |
| |
# |
| |
sub GetProfileKeys { |
| |
my $cmd = shift; |
| |
my $tail = shift; |
| |
my $client = shift; |
| |
my $userinput = "$cmd:$tail"; |
| |
|
| |
my ($udom,$uname,$namespace)=split(/:/,$tail); |
| |
my $qresult=''; |
| |
my $hashref = TieUserHash($udom, $uname, $namespace, |
| |
&GDBM_READER()); |
| |
if ($hashref) { |
| |
foreach my $key (keys %$hashref) { |
| |
$qresult.="$key&"; |
| |
} |
| |
if (untie(%$hashref)) { |
| |
$qresult=~s/\&$//; |
| |
Reply($client, "$qresult\n", $userinput); |
| |
} else { |
| |
Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". |
| |
"while attempting keys\n", $userinput); |
| |
} |
| |
} else { |
| |
Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ". |
| |
"while attempting keys\n", $userinput); |
| |
} |
| |
|
| |
return 1; |
| |
} |
| |
RegisterHandler("keys", \&GetProfileKeys, 0, 1, 0); |
| |
# |
| |
# Dump the contents of a user profile database. |
| |
# Note that this constitutes a very large covert channel too since |
| |
# the dump will return sensitive information that is not encrypted. |
| |
# The naive security assumption is that the session negotiation ensures |
| |
# our client is trusted and I don't believe that's assured at present. |
| |
# Sure want badly to go to ssl or tls. Of course if my peer isn't really |
| |
# a LonCAPA node they could have negotiated an encryption key too so >sigh<. |
| |
# |
| |
# Parameters: |
| |
# $cmd - The command request keyword (currentdump). |
| |
# $tail - Remainder of the request, consisting of a colon |
| |
# separated list that has the domain/username and |
| |
# the namespace to dump (database file). |
| |
# $client - file open on the remote client. |
| |
# Returns: |
| |
# 1 - Continue processing. |
| |
# 0 - Exit the server. |
| |
# |
| |
sub DumpProfileDatabase { |
| |
my $cmd = shift; |
| |
my $tail = shift; |
| |
my $client = shift; |
| |
my $userinput = "$cmd:$tail"; |
| |
|
| |
my ($udom,$uname,$namespace) = split(/:/,$tail); |
| |
my $hashref = TieUserHash($udom, $uname, $namespace, |
| |
&GDBM_READER()); |
| |
if ($hashref) { |
| |
# Structure of %data: |
| |
# $data{$symb}->{$parameter}=$value; |
| |
# $data{$symb}->{'v.'.$parameter}=$version; |
| |
# since $parameter will be unescaped, we do not |
| |
# have to worry about silly parameter names... |
| |
|
| |
my $qresult=''; |
| |
my %data = (); # A hash of anonymous hashes.. |
| |
while (my ($key,$value) = each(%$hashref)) { |
| |
my ($v,$symb,$param) = split(/:/,$key); |
| |
next if ($v eq 'version' || $symb eq 'keys'); |
| |
next if (exists($data{$symb}) && |
| |
exists($data{$symb}->{$param}) && |
| |
$data{$symb}->{'v.'.$param} > $v); |
| |
$data{$symb}->{$param}=$value; |
| |
$data{$symb}->{'v.'.$param}=$v; |
| |
} |
| |
if (untie(%$hashref)) { |
| |
while (my ($symb,$param_hash) = each(%data)) { |
| |
while(my ($param,$value) = each (%$param_hash)){ |
| |
next if ($param =~ /^v\./); # Ignore versions... |
| |
# |
| |
# Just dump the symb=value pairs separated by & |
| |
# |
| |
$qresult.=$symb.':'.$param.'='.$value.'&'; |
| |
} |
| |
} |
| |
chop($qresult); |
| |
Reply($client , "$qresult\n", $userinput); |
| |
} else { |
| |
Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ". |
| |
"while attempting currentdump\n", $userinput); |
| |
} |
| |
} else { |
| |
Failure($client, "error: ".($!+0)." tie(GDBM) Failed ". |
| |
"while attempting currentdump\n", $userinput); |
| |
} |
| |
|
| |
return 1; |
| |
} |
| |
RegisterHandler("currentdump", \&DumpProfileDatabase, 0, 1, 0); |
| |
# |
| |
# Dump a profile database with an optional regular expression |
| |
# to match against the keys. In this dump, no effort is made |
| |
# to separate symb from version information. Presumably the |
| |
# databases that are dumped by this command are of a different |
| |
# structure. Need to look at this and improve the documentation of |
| |
# both this and the currentdump handler. |
| |
# Parameters: |
| |
# $cmd - The command keyword. |
| |
# $tail - All of the characters after the $cmd: |
| |
# These are expected to be a colon |
| |
# separated list containing: |
| |
# domain/user - identifying the user. |
| |
# namespace - identifying the database. |
| |
# regexp - optional regular expression |
| |
# that is matched against |
| |
# database keywords to do |
| |
# selective dumps. |
| |
# $client - Channel open on the client. |
| |
# Returns: |
| |
# 1 - Continue processing. |
| |
# Side effects: |
| |
# response is written to $client. |
| |
# |
| |
sub DumpWithRegexp { |
| |
my $cmd = shift; |
| |
my $tail = shift; |
| |
my $client = shift; |
| |
|
| |
my $userinput = "$cmd:$tail"; |
| |
|
| |
my ($udom,$uname,$namespace,$regexp)=split(/:/,$tail); |
| |
if (defined($regexp)) { |
| |
$regexp=&unescape($regexp); |
| |
} else { |
| |
$regexp='.'; |
| |
} |
| |
my $hashref =TieUserHash($udom, $uname, $namespace, |
| |
&GDBM_READER()); |
| |
if ($hashref) { |
| |
my $qresult=''; |
| |
while (my ($key,$value) = each(%$hashref)) { |
| |
if ($regexp eq '.') { |
| |
$qresult.=$key.'='.$value.'&'; |
| |
} else { |
| |
my $unescapeKey = &unescape($key); |
| |
if (eval('$unescapeKey=~/$regexp/')) { |
| |
$qresult.="$key=$value&"; |
| |
} |
| |
} |
| |
} |
| |
if (untie(%$hashref)) { |
| |
chop($qresult); |
| |
Reply($client, "$qresult\n", $userinput); |
| |
} else { |
| |
Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ". |
| |
"while attempting dump\n", $userinput); |
| |
} |
| |
} else { |
| |
Failure($client, "error: ".($!+0)." tie(GDBM) Failed ". |
| |
"while attempting dump\n", $userinput); |
| |
} |
| |
|
| |
return 1; |
| |
} |
| |
RegisterHandler("dump", \&DumpWithRegexp, 0, 1, 0); |
| |
|
| |
# Store an aitem in any resource meta data(?) or database with |
| |
# versioning? |
| |
# |
| |
# Parameters: |
| |
# $cmd - Request command keyword. |
| |
# $tail - Tail of the request. This is a colon |
| |
# separated list containing: |
| |
# domain/user - User and authentication domain. |
| |
# namespace - Name of the database being modified |
| |
# rid - Resource keyword to modify. |
| |
# what - new value associated with rid. |
| |
# |
| |
# $client - Socket open on the client. |
| |
# |
| |
# |
| |
# Returns: |
| |
# 1 (keep on processing). |
| |
# Side-Effects: |
| |
# Writes to the client |
| |
sub StoreHandler { |
| |
my $cmd = shift; |
| |
my $tail = shift; |
| |
my $client = shift; |
| |
|
| |
my $userinput = "$cmd:$tail"; |
| |
|
| |
my ($udom,$uname,$namespace,$rid,$what) =split(/:/,$tail); |
| |
if ($namespace ne 'roles') { |
| |
|
| |
chomp($what); |
| |
my @pairs=split(/\&/,$what); |
| |
my $hashref = TieUserHash($udom, $uname, $namespace, |
| |
&GDBM_WRCREAT(), "P", |
| |
"$rid:$what"); |
| |
if ($hashref) { |
| |
my $now = time; |
| |
my @previouskeys=split(/&/,$hashref->{"keys:$rid"}); |
| |
my $key; |
| |
$hashref->{"version:$rid"}++; |
| |
my $version=$hashref->{"version:$rid"}; |
| |
my $allkeys=''; |
| |
foreach my $pair (@pairs) { |
| |
my ($key,$value)=split(/=/,$pair); |
| |
$allkeys.=$key.':'; |
| |
$hashref->{"$version:$rid:$key"}=$value; |
| |
} |
| |
$hashref->{"$version:$rid:timestamp"}=$now; |
| |
$allkeys.='timestamp'; |
| |
$hashref->{"$version:keys:$rid"}=$allkeys; |
| |
if (untie($hashref)) { |
| |
Reply($client, "ok\n", $userinput); |
| |
} else { |
| |
Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". |
| |
"while attempting store\n", $userinput); |
| |
} |
| |
} else { |
| |
Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ". |
| |
"while attempting store\n", $userinput); |
| |
} |
| |
} else { |
| |
Failure($client, "refused\n", $userinput); |
| |
} |
| |
|
| |
return 1; |
| |
} |
| |
RegisterHandler("store", \&StoreHandler, 0, 1, 0); |
| |
# |
| |
# Restore a prior version of a resource. |
| |
# |
| |
# Parameters: |
| |
# $cmd - Command keyword. |
| |
# $tail - Remainder of the request which consists of: |
| |
# domain/user - User and auth. domain. |
| |
# namespace - name of resource database. |
| |
# rid - Resource id. |
| |
# $client - socket open on the client. |
| |
# |
| |
# Returns: |
| |
# 1 indicating the caller should not yet exit. |
| |
# Side-effects: |
| |
# Writes a reply to the client. |
| |
# |
| |
sub RestoreHandler { |
| |
my $cmd = shift; |
| |
my $tail = shift; |
| |
my $client = shift; |
| |
|
| |
my $userinput = "$cmd:$tail"; # Only used for logging purposes. |
| |
|
| |
my ($cmd,$udom,$uname,$namespace,$rid) = split(/:/,$userinput); |
| |
$namespace=~s/\//\_/g; |
| |
$namespace=~s/\W//g; |
| |
chomp($rid); |
| |
my $proname=propath($udom,$uname); |
| |
my $qresult=''; |
| |
my %hash; |
| |
if (tie(%hash,'GDBM_File',"$proname/$namespace.db", |
| |
&GDBM_READER(),0640)) { |
| |
my $version=$hash{"version:$rid"}; |
| |
$qresult.="version=$version&"; |
| |
my $scope; |
| |
for ($scope=1;$scope<=$version;$scope++) { |
| |
my $vkeys=$hash{"$scope:keys:$rid"}; |
| |
my @keys=split(/:/,$vkeys); |
| |
my $key; |
| |
$qresult.="$scope:keys=$vkeys&"; |
| |
foreach $key (@keys) { |
| |
$qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&"; |
| |
} |
| |
} |
| |
if (untie(%hash)) { |
| |
$qresult=~s/\&$//; |
| |
Reply( $client, "$qresult\n", $userinput); |
| |
} else { |
| |
Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". |
| |
"while attempting restore\n", $userinput); |
| |
} |
| |
} else { |
| |
Failure($client, "error: ".($!+0)." tie(GDBM) Failed ". |
| |
"while attempting restore\n", $userinput); |
| |
} |
| |
|
| |
return 1; |
| |
|
| |
|
| |
} |
| |
RegisterHandler("restore", \&RestoreHandler, 0,1,0); |
| |
|
| |
# |
| |
# Add a chat message to to a discussion board. |
| |
# |
| |
# Parameters: |
| |
# $cmd - Request keyword. |
| |
# $tail - Tail of the command. A colon separated list |
| |
# containing: |
| |
# cdom - Domain on which the chat board lives |
| |
# cnum - Identifier of the discussion group. |
| |
# post - Body of the posting. |
| |
# $client - Socket open on the client. |
| |
# Returns: |
| |
# 1 - Indicating caller should keep on processing. |
| |
# |
| |
# Side-effects: |
| |
# writes a reply to the client. |
| |
# |
| |
# |
| |
sub SendChatHandler { |
| |
my $cmd = shift; |
| |
my $tail = shift; |
| |
my $client = shift; |
| |
|
| |
my $userinput = "$cmd:$tail"; |
| |
|
| |
my ($cdom,$cnum,$newpost)=split(/\:/,$tail); |
| |
&chatadd($cdom,$cnum,$newpost); |
| |
Reply($client, "ok\n", $userinput); |
| |
|
| |
return 1; |
| |
} |
| |
RegisterHandler("chatsend", \&SendChatHandler, 0, 1, 0); |
| |
# |
| |
# Retrieve the set of chat messagss from a discussion board. |
| |
# |
| |
# Parameters: |
| |
# $cmd - Command keyword that initiated the request. |
| |
# $tail - Remainder of the request after the command |
| |
# keyword. In this case a colon separated list of |
| |
# chat domain - Which discussion board. |
| |
# chat id - Discussion thread(?) |
| |
# domain/user - Authentication domain and username |
| |
# of the requesting person. |
| |
# $client - Socket open on the client program. |
| |
# Returns: |
| |
# 1 - continue processing |
| |
# Side effects: |
| |
# Response is written to the client. |
| |
# |
| |
sub RetrieveChatHandler { |
| |
my $cmd = shift; |
| |
my $tail = shift; |
| |
my $client = shift; |
| |
|
| |
my $userinput = "$cmd:$tail"; |
| |
|
| |
my ($cdom,$cnum,$udom,$uname)=split(/\:/,$tail); |
| |
my $reply=''; |
| |
foreach (&getchat($cdom,$cnum,$udom,$uname)) { |
| |
$reply.=&escape($_).':'; |
| |
} |
| |
$reply=~s/\:$//; |
| |
Reply($client, $reply."\n", $userinput); |
| |
|
| |
|
| |
return 1; |
| |
} |
| |
RegisterHandler("chatretr", \&RetrieveChatHandler, 0, 1, 0); |
| |
# |
| |
# Initiate a query of an sql database. SQL query repsonses get put in |
| |
# a file for later retrieval. This prevents sql query results from |
| |
# bottlenecking the system. Note that with loncnew, perhaps this is |
| |
# less of an issue since multiple outstanding requests can be concurrently |
| |
# serviced. |
| |
# |
| |
# Parameters: |
| |
# $cmd - COmmand keyword that initiated the request. |
| |
# $tail - Remainder of the command after the keyword. |
| |
# For this function, this consists of a query and |
| |
# 3 arguments that are self-documentingly labelled |
| |
# in the original arg1, arg2, arg3. |
| |
# $client - Socket open on the client. |
| |
# Return: |
| |
# 1 - Indicating processing should continue. |
| |
# Side-effects: |
| |
# a reply is written to $client. |
| |
# |
| |
sub SendQueryHandler { |
| |
my $cmd = shift; |
| |
my $tail = shift; |
| |
my $client = shift; |
| |
|
| |
my $userinput = "$cmd:$tail"; |
| |
|
| |
my ($query,$arg1,$arg2,$arg3)=split(/\:/,$tail); |
| |
$query=~s/\n*$//g; |
| |
Reply($client, "". sqlreply("$clientname\&$query". |
| |
"\&$arg1"."\&$arg2"."\&$arg3")."\n", |
| |
$userinput); |
| |
|
| |
return 1; |
| |
} |
| |
RegisterHandler("querysend", \&SendQueryHandler, 0, 1, 0); |
| |
|
| |
# |
| |
# Add a reply to an sql query. SQL queries are done asyncrhonously. |
| |
# The query is submitted via a "querysend" transaction. |
| |
# There it is passed on to the lonsql daemon, queued and issued to |
| |
# mysql. |
| |
# This transaction is invoked when the sql transaction is complete |
| |
# it stores the query results in flie and indicates query completion. |
| |
# presumably local software then fetches this response... I'm guessing |
| |
# the sequence is: lonc does a querysend, we ask lonsql to do it. |
| |
# lonsql on completion of the query interacts with the lond of our |
| |
# client to do a query reply storing two files: |
| |
# - id - The results of the query. |
| |
# - id.end - Indicating the transaction completed. |
| |
# NOTE: id is a unique id assigned to the query and querysend time. |
| |
# Parameters: |
| |
# $cmd - Command keyword that initiated this request. |
| |
# $tail - Remainder of the tail. In this case that's a colon |
| |
# separated list containing the query Id and the |
| |
# results of the query. |
| |
# $client - Socket open on the client. |
| |
# Return: |
| |
# 1 - Indicating that we should continue processing. |
| |
# Side effects: |
| |
# ok written to the client. |
| |
# |
| |
sub ReplyQueryHandler { |
| |
my $cmd = shift; |
| |
my $tail = shift; |
| |
my $client = shift; |
| |
|
| |
my $userinput = "$cmd:$tail"; |
| |
|
| |
my ($cmd,$id,$reply)=split(/:/,$userinput); |
| |
my $store; |
| |
my $execdir=$perlvar{'lonDaemons'}; |
| |
if ($store=IO::File->new(">$execdir/tmp/$id")) { |
| |
$reply=~s/\&/\n/g; |
| |
print $store $reply; |
| |
close $store; |
| |
my $store2=IO::File->new(">$execdir/tmp/$id.end"); |
| |
print $store2 "done\n"; |
| |
close $store2; |
| |
Reply($client, "ok\n", $userinput); |
| |
} else { |
| |
Failure($client, "error: ".($!+0) |
| |
." IO::File->new Failed ". |
| |
"while attempting queryreply\n", $userinput); |
| |
} |
| |
|
| |
|
| |
return 1; |
| |
} |
| |
RegisterHandler("queryreply", \&ReplyQueryHandler, 0, 1, 0); |
| |
# |
| |
# Process the courseidput query. Not quite sure what this means |
| |
# at the system level sense. It appears a gdbm file in the |
| |
# /home/httpd/lonUsers/$domain/nohist_courseids is tied and |
| |
# a set of entries made in that database. |
| |
# |
| |
# Parameters: |
| |
# $cmd - The command keyword that initiated this request. |
| |
# $tail - Tail of the command. In this case consists of a colon |
| |
# separated list contaning the domain to apply this to and |
| |
# an ampersand separated list of keyword=value pairs. |
| |
# $client - Socket open on the client. |
| |
# Returns: |
| |
# 1 - indicating that processing should continue |
| |
# |
| |
# Side effects: |
| |
# reply is written to the client. |
| |
# |
| |
sub PutCourseIdHandler { |
| |
my $cmd = shift; |
| |
my $tail = shift; |
| |
my $client = shift; |
| |
|
| |
my $userinput = "$cmd:$tail"; |
| |
|
| |
my ($udom, $what) = split(/:/, $tail); |
| |
chomp($what); |
| |
my $now=time; |
| |
my @pairs=split(/\&/,$what); |
| |
|
| |
my $hashref = TieDomainHash($udom, "nohist_courseids", &GDBM_WRCREAT()); |
| |
if ($hashref) { |
| |
foreach my $pair (@pairs) { |
| |
my ($key,$value)=split(/=/,$pair); |
| |
$hashref->{$key}=$value.':'.$now; |
| |
} |
| |
if (untie(%$hashref)) { |
| |
Reply($client, "ok\n", $userinput); |
| |
} else { |
| |
Failure( $client, "error: ".($!+0) |
| |
." untie(GDBM) Failed ". |
| |
"while attempting courseidput\n", $userinput); |
| |
} |
| |
} else { |
| |
Failure( $client, "error: ".($!+0) |
| |
." tie(GDBM) Failed ". |
| |
"while attempting courseidput\n", $userinput); |
| |
} |
| |
|
| |
return 1; |
| |
} |
| |
RegisterHandler("courseidput", \&PutCourseIdHandler, 0, 1, 0); |
| |
|
| |
# Retrieves the value of a course id resource keyword pattern |
| |
# defined since a starting date. Both the starting date and the |
| |
# keyword pattern are optional. If the starting date is not supplied it |
| |
# is treated as the beginning of time. If the pattern is not found, |
| |
# it is treatred as "." matching everything. |
| |
# |
| |
# Parameters: |
| |
# $cmd - Command keyword that resulted in us being dispatched. |
| |
# $tail - The remainder of the command that, in this case, consists |
| |
# of a colon separated list of: |
| |
# domain - The domain in which the course database is |
| |
# defined. |
| |
# since - Optional parameter describing the minimum |
| |
# time of definition(?) of the resources that |
| |
# will match the dump. |
| |
# description - regular expression that is used to filter |
| |
# the dump. Only keywords matching this regexp |
| |
# will be used. |
| |
# $client - The socket open on the client. |
| |
# Returns: |
| |
# 1 - Continue processing. |
| |
# Side Effects: |
| |
# a reply is written to $client. |
| |
sub DumpCourseIdHandler { |
| |
my $cmd = shift; |
| |
my $tail = shift; |
| |
my $client = shift; |
| |
|
| |
my $userinput = "$cmd:$tail"; |
| |
|
| |
my ($udom,$since,$description) =split(/:/,$tail); |
| |
if (defined($description)) { |
| |
$description=&unescape($description); |
| |
} else { |
| |
$description='.'; |
| |
} |
| |
unless (defined($since)) { $since=0; } |
| |
my $qresult=''; |
| |
logthis(" Looking for $description since $since"); |
| |
my $hashref = TieDomainHash($udom, "nohist_courseids", &GDBM_WRCREAT()); |
| |
if ($hashref) { |
| |
while (my ($key,$value) = each(%$hashref)) { |
| |
my ($descr,$lasttime)=split(/\:/,$value); |
| |
logthis("Got: key = $key descr = $descr time: $lasttime"); |
| |
if ($lasttime<$since) { |
| |
logthis("Skipping .. too early"); |
| |
next; |
| |
} |
| |
if ($description eq '.') { |
| |
logthis("Adding wildcard match"); |
| |
$qresult.=$key.'='.$descr.'&'; |
| |
} else { |
| |
my $unescapeVal = &unescape($descr); |
| |
logthis("Matching with $unescapeVal"); |
| |
if (eval('$unescapeVal=~/$description/i')) { |
| |
logthis("Adding on match"); |
| |
$qresult.="$key=$descr&"; |
| |
} |
| |
} |
| |
} |
| |
if (untie(%$hashref)) { |
| |
chop($qresult); |
| |
Reply($client, "$qresult\n", $userinput); |
| |
} else { |
| |
Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". |
| |
"while attempting courseiddump\n", $userinput); |
| |
} |
| |
} else { |
| |
Failure($client, "error: ".($!+0)." tie(GDBM) Failed ". |
| |
"while attempting courseiddump\n", $userinput); |
| |
} |
| |
|
| |
|
| |
return 1; |
| |
} |
| |
RegisterHandler("courseiddump", \&DumpCourseIdHandler, 0, 1, 0); |
| |
# |
| |
# Puts an id to a domains id database. |
| |
# |
| |
# Parameters: |
| |
# $cmd - The command that triggered us. |
| |
# $tail - Remainder of the request other than the command. This is a |
| |
# colon separated list containing: |
| |
# $domain - The domain for which we are writing the id. |
| |
# $pairs - The id info to write... this is and & separated list |
| |
# of keyword=value. |
| |
# $client - Socket open on the client. |
| |
# Returns: |
| |
# 1 - Continue processing. |
| |
# Side effects: |
| |
# reply is written to $client. |
| |
# |
| |
sub PutIdHandler { |
| |
my $cmd = shift; |
| |
my $tail = shift; |
| |
my $client = shift; |
| |
|
| |
my $userinput = "$cmd:$tail"; |
| |
|
| |
my ($udom,$what)=split(/:/,$tail); |
| |
chomp($what); |
| |
my @pairs=split(/\&/,$what); |
| |
my $hashref = TieDomainHash($udom, "ids", &GDBM_WRCREAT(), |
| |
"P", $what); |
| |
if ($hashref) { |
| |
foreach my $pair (@pairs) { |
| |
my ($key,$value)=split(/=/,$pair); |
| |
$hashref->{$key}=$value; |
| |
} |
| |
if (untie(%$hashref)) { |
| |
Reply($client, "ok\n", $userinput); |
| |
} else { |
| |
Failure($client, "error: ".($!+0)." untie(GDBM) Failed ". |
| |
"while attempting idput\n", $userinput); |
| |
} |
| |
} else { |
| |
Failure( $client, "error: ".($!+0)." tie(GDBM) Failed ". |
| |
"while attempting idput\n", $userinput); |
| |
} |
| |
|
| |
return 1; |
| |
} |
| |
|
| |
RegisterHandler("idput", \&PutIdHandler, 0, 1, 0); |
| |
# |
| |
# Retrieves a set of id values from the id database. |
| |
# Returns an & separated list of results, one for each requested id to the |
| |
# client. |
| |
# |
| |
# Parameters: |
| |
# $cmd - Command keyword that caused us to be dispatched. |
| |
# $tail - Tail of the command. Consists of a colon separated: |
| |
# domain - the domain whose id table we dump |
| |
# ids Consists of an & separated list of |
| |
# id keywords whose values will be fetched. |
| |
# nonexisting keywords will have an empty value. |
| |
# $client - Socket open on the client. |
| |
# |
| |
# Returns: |
| |
# 1 - indicating processing should continue. |
| |
# Side effects: |
| |
# An & separated list of results is written to $client. |
| |
# |
| |
sub GetIdHandler { |
| |
my $cmd = shift; |
| |
my $tail = shift; |
| |
my $client = shift; |
| |
|
| |
my $userinput = "$client:$tail"; |
| |
|
| |
my ($udom,$what)=split(/:/,$tail); |
| |
chomp($what); |
| |
my @queries=split(/\&/,$what); |
| |
my $qresult=''; |
| |
my $hashref = TieDomainHash($udom, "ids", &GDBM_READER()); |
| |
if ($hashref) { |
| |
for (my $i=0;$i<=$#queries;$i++) { |
| |
$qresult.="$hashref->{$queries[$i]}&"; |
| |
} |
| |
if (untie(%$hashref)) { |
| |
$qresult=~s/\&$//; |
| |
Reply($client, "$qresult\n", $userinput); |
| |
} else { |
| |
Failure( $client, "error: ".($!+0)." untie(GDBM) Failed ". |
| |
"while attempting idget\n",$userinput); |
| |
} |
| |
} else { |
| |
Failure($client, "error: ".($!+0)." tie(GDBM) Failed ". |
| |
"while attempting idget\n",$userinput); |
| |
} |
| |
|
| |
return 1; |
| |
} |
| |
|
| |
RegisterHandler("idget", \&GetIdHandler, 0, 1, 0); |
| |
# |
| |
# Process the tmpput command I'm not sure what this does.. Seems to |
| |
# create a file in the lonDaemons/tmp directory of the form $id.tmp |
| |
# where Id is the client's ip concatenated with a sequence number. |
| |
# The file will contain some value that is passed in. Is this e.g. |
| |
# a login token? |
| |
# |
| |
# Parameters: |
| |
# $cmd - The command that got us dispatched. |
| |
# $tail - The remainder of the request following $cmd: |
| |
# In this case this will be the contents of the file. |
| |
# $client - Socket connected to the client. |
| |
# Returns: |
| |
# 1 indicating processing can continue. |
| |
# Side effects: |
| |
# A file is created in the local filesystem. |
| |
# A reply is sent to the client. |
| |
sub TmpPutHandler { |
| |
my $cmd = shift; |
| |
my $what = shift; |
| |
my $client = shift; |
| |
|
| |
my $userinput = "$cmd:$what"; # Reconstruct for logging. |
| |
|
| |
|
| |
my $store; |
| |
$tmpsnum++; |
| |
my $pid = $$; |
| |
my $id=$$.'_'.$clientip.'_'.$tmpsnum.'_'.$pid; |
| |
$id=~s/\W/\_/g; |
| |
$what=~s/\n//g; |
| |
my $execdir=$perlvar{'lonDaemons'}; |
| |
if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) { |
| |
print $store $what; |
| |
close $store; |
| |
Reply($client, "$id\n", $userinput); |
| |
} else { |
| |
Failure( $client, "error: ".($!+0)."IO::File->new Failed ". |
| |
"while attempting tmpput\n", $userinput); |
| |
} |
| |
return 1; |
| |
|
| |
} |
| |
RegisterHandler("tmpput", \&TmpPutHandler, 0, 1, 0); |
| |
|
| |
# Processes the tmpget command. This command returns the contents |
| |
# of a temporary resource file(?) created via tmpput. |
| |
# |
| |
# Paramters: |
| |
# $cmd - Command that got us dispatched. |
| |
# $id - Tail of the command, contain the id of the resource |
| |
# we want to fetch. |
| |
# $client - socket open on the client. |
| |
# Return: |
| |
# 1 - Inidcating processing can continue. |
| |
# Side effects: |
| |
# A reply is sent to the client. |
| |
|
| |
# |
| |
sub TmpGetHandler { |
| |
my $cmd = shift; |
| |
my $id = shift; |
| |
my $client = shift; |
| |
my $userinput = "$cmd:$id"; |
| |
|
| |
chomp($id); |
| |
$id=~s/\W/\_/g; |
| |
my $store; |
| |
my $execdir=$perlvar{'lonDaemons'}; |
| |
if ($store=IO::File->new("$execdir/tmp/$id.tmp")) { |
| |
my $reply=<$store>; |
| |
Reply( $client, "$reply\n", $userinput); |
| |
close $store; |
| |
} else { |
| |
Failure( $client, "error: ".($!+0)."IO::File->new Failed ". |
| |
"while attempting tmpget\n", $userinput); |
| |
} |
| |
|
| |
return 1; |
| |
} |
| |
RegisterHandler("tmpget", \&TmpGetHandler, 0, 1, 0); |
| |
# |
| |
# Process the tmpdel command. This command deletes a temp resource |
| |
# created by the tmpput command. |
| |
# |
| |
# Parameters: |
| |
# $cmd - Command that got us here. |
| |
# $id - Id of the temporary resource created. |
| |
# $client - socket open on the client process. |
| |
# |
| |
# Returns: |
| |
# 1 - Indicating processing should continue. |
| |
# Side Effects: |
| |
# A file is deleted |
| |
# A reply is sent to the client. |
| |
sub TmpDelHandler { |
| |
my $cmd = shift; |
| |
my $id = shift; |
| |
my $client = shift; |
| |
|
| |
my $userinput= "$cmd:$id"; |
| |
|
| |
chomp($id); |
| |
$id=~s/\W/\_/g; |
| |
my $execdir=$perlvar{'lonDaemons'}; |
| |
if (unlink("$execdir/tmp/$id.tmp")) { |
| |
Reply($client, "ok\n", $userinput); |
| |
} else { |
| |
Failure( $client, "error: ".($!+0)."Unlink tmp Failed ". |
| |
"while attempting tmpdel\n", $userinput); |
| |
} |
| |
|
| |
return 1; |
| |
|
| |
} |
| |
RegisterHandler("tmpdel", \&TmpDelHandler, 0, 1, 0); |
| |
# |
| |
# ls - list the contents of a directory. For each file in the |
| |
# selected directory the filename followed by the full output of |
| |
# the stat function is returned. The returned info for each |
| |
# file are separated by ':'. The stat fields are separated by &'s. |
| |
# Parameters: |
| |
# $cmd - The command that dispatched us (ls). |
| |
# $ulsdir - The directory path to list... I'm not sure what this |
| |
# is relative as things like ls:. return e.g. |
| |
# no_such_dir. |
| |
# $client - Socket open on the client. |
| |
# Returns: |
| |
# 1 - indicating that the daemon should not disconnect. |
| |
# Side Effects: |
| |
# The reply is written to $client. |
| |
# |
| |
sub LsHandler { |
| |
my $cmd = shift; |
| |
my $ulsdir = shift; |
| |
my $client = shift; |
| |
|
| |
my $userinput = "$cmd:$ulsdir"; |
| |
|
| |
my $ulsout=''; |
| |
my $ulsfn; |
| |
if (-e $ulsdir) { |
| |
if(-d $ulsdir) { |
| |
if (opendir(LSDIR,$ulsdir)) { |
| |
while ($ulsfn=readdir(LSDIR)) { |
| |
my @ulsstats=stat($ulsdir.'/'.$ulsfn); |
| |
$ulsout.=$ulsfn.'&'. |
| |
join('&',@ulsstats).':'; |
| |
} |
| |
closedir(LSDIR); |
| |
} |
| |
} else { |
| |
my @ulsstats=stat($ulsdir); |
| |
$ulsout.=$ulsfn.'&'.join('&',@ulsstats).':'; |
| |
} |
| |
} else { |
| |
$ulsout='no_such_dir'; |
| |
} |
| |
if ($ulsout eq '') { $ulsout='empty'; } |
| |
Reply($client, "$ulsout\n", $userinput); |
| |
|
| |
|
| |
return 1; |
| |
} |
| |
RegisterHandler("ls", \&LsHandler, 0, 1, 0); |
| |
|
| |
|
| |
# |
| |
# Processes the setannounce command. This command |
| |
# creates a file named announce.txt in the top directory of |
| |
# the documentn root and sets its contents. The announce.txt file is |
| |
# printed in its entirety at the LonCAPA login page. Note: |
| |
# once the announcement.txt fileis created it cannot be deleted. |
| |
# However, setting the contents of the file to empty removes the |
| |
# announcement from the login page of loncapa so who cares. |
| |
# |
| |
# Parameters: |
| |
# $cmd - The command that got us dispatched. |
| |
# $announcement - The text of the announcement. |
| |
# $client - Socket open on the client process. |
| |
# Retunrns: |
| |
# 1 - Indicating request processing should continue |
| |
# Side Effects: |
| |
# The file {DocRoot}/announcement.txt is created. |
| |
# A reply is sent to $client. |
| |
# |
| |
sub SetAnnounceHandler { |
| |
my $cmd = shift; |
| |
my $announcement = shift; |
| |
my $client = shift; |
| |
|
| |
my $userinput = "$cmd:$announcement"; |
| |
|
| |
chomp($announcement); |
| |
$announcement=&unescape($announcement); |
| |
if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}. |
| |
'/announcement.txt')) { |
| |
print $store $announcement; |
| |
close $store; |
| |
Reply($client, "ok\n", $userinput); |
| |
} else { |
| |
Failure($client, "error: ".($!+0)."\n", $userinput); |
| |
} |
| |
|
| |
return 1; |
| |
} |
| |
RegisterHandler("setannounce", \&SetAnnounceHandler, 0, 1, 0); |
| |
|
| |
# |
| |
# Return the version of the daemon. This can be used to determine |
| |
# the compatibility of cross version installations or, alternatively to |
| |
# simply know who's out of date and who isn't. Note that the version |
| |
# is returned concatenated with the tail. |
| |
# Parameters: |
| |
# $cmd - the request that dispatched to us. |
| |
# $tail - Tail of the request (client's version?). |
| |
# $client - Socket open on the client. |
| |
#Returns: |
| |
# 1 - continue processing requests. |
| |
# Side Effects: |
| |
# Replies with version to $client. |
| |
sub GetVersionHandler { |
| |
my $client = shift; |
| |
my $tail = shift; |
| |
my $client = shift; |
| |
my $userinput = $client; |
| |
|
| |
Reply($client, &version($userinput)."\n", $userinput); |
| |
|
| |
|
| |
return 1; |
| |
} |
| |
RegisterHandler("version", \&GetVersionHandler, 0, 1, 0); |
| |
|
| |
# Set the current host and domain. This is used to support |
| |
# multihomed systems. Each IP of the system, or even separate daemons |
| |
# on the same IP can be treated as handling a separate lonCAPA virtual |
| |
# machine. This command selects the virtual lonCAPA. The client always |
| |
# knows the right one since it is lonc and it is selecting the domain/system |
| |
# from the hosts.tab file. |
| |
# Parameters: |
| |
# $cmd - Command that dispatched us. |
| |
# $tail - Tail of the command (domain/host requested). |
| |
# $socket - Socket open on the client. |
| |
# |
| |
# Returns: |
| |
# 1 - Indicates the program should continue to process requests. |
| |
# Side-effects: |
| |
# The default domain/system context is modified for this daemon. |
| |
# a reply is sent to the client. |
| |
# |
| |
sub SelectHostHandler { |
| |
my $cmd = shift; |
| |
my $tail = shift; |
| |
my $socket = shift; |
| |
|
| |
my $userinput ="$cmd:$tail"; |
| |
|
| |
Reply($client, &sethost($userinput)."\n", $userinput); |
| |
|
| |
|
| |
return 1; |
| |
} |
| |
RegisterHandler("sethost", \&SelectHostHandler, 0, 1, 0); |
| |
|
| |
# Process a request to exit: |
| |
# - "bye" is sent to the client. |
| |
# - The client socket is shutdown and closed. |
| |
# - We indicate to the caller that we should exit. |
| |
# Formal Parameters: |
| |
# $cmd - The command that got us here. |
| |
# $tail - Tail of the command (empty). |
| |
# $client - Socket open on the tail. |
| |
# Returns: |
| |
# 0 - Indicating the program should exit!! |
| |
# |
| |
sub ExitHandler { |
| |
my $cmd = shift; |
| |
my $tail = shift; |
| |
my $client = shift; |
| |
|
| |
my $userinput = "$cmd:$tail"; |
| |
|
| |
&logthis("Client $clientip ($clientname) hanging up: $userinput"); |
| |
Reply($client, "bye\n", $userinput); |
| |
$client->shutdown(2); # shutdown the socket forcibly. |
| |
$client->close(); |
| |
|
| |
return 0; |
| |
} |
| |
RegisterHandler("exit", \&ExitHandler, 0, 1,1); |
| |
RegisterHandler("init", \&ExitHandler, 0, 1,1); # RE-init is like exit. |
| |
RegisterHandler("quit", \&ExitHandler, 0, 1,1); # I like this too! |
| |
#------------------------------------------------------------------------------------ |
| |
# |
| |
# Process a Request. Takes a request from the client validates |
| |
# it and performs the operation requested by it. Returns |
| |
# a response to the client. |
| |
# |
| |
# Parameters: |
| |
# request - A string containing the user's request. |
| |
# Returns: |
| |
# 0 - Requested to exit, caller should shut down. |
| |
# 1 - Accept additional requests from the client. |
| |
# |
| |
sub ProcessRequest { |
| |
my $Request = shift; |
| |
my $KeepGoing = 1; # Assume we're not asked to stop. |
| |
|
| |
my $wasenc=0; |
| |
my $userinput = $Request; # for compatibility with oldcode <yeach> |
| |
|
| |
|
| |
# ------------------------------------------------------------ See if encrypted |
| |
|
| |
if($userinput =~ /^enc/) { |
| |
$wasenc = 1; |
| |
$userinput = Decipher($userinput); |
| |
if(! $userinput) { |
| |
Failure($client,"error:Encrypted data without negotiating key"); |
| |
return 0; # Break off with this imposter. |
| |
} |
| |
} |
| |
# Split off the request keyword from the rest of the stuff. |
| |
|
| |
my ($command, $tail) = split(/:/, $userinput, 2); |
| |
|
| |
Debug("Command received: $command, encoded = $wasenc"); |
| |
|
| |
|
| |
# ------------------------------------------------------------- Normal commands |
| |
|
| |
# |
| |
# If the command is in the hash, then execute it via the hash dispatch: |
| |
# |
| |
if(defined $Dispatcher{$command}) { |
| |
|
| |
my $DispatchInfo = $Dispatcher{$command}; |
| |
my $Handler = $$DispatchInfo[0]; |
| |
my $NeedEncode = $$DispatchInfo[1]; |
| |
my $ClientTypes = $$DispatchInfo[2]; |
| |
Debug("Matched dispatch hash: mustencode: $NeedEncode ClientType $ClientTypes"); |
| |
|
| |
# Validate the request: |
| |
|
| |
my $ok = 1; |
| |
my $requesterprivs = 0; |
| |
if(isClient()) { |
| |
$requesterprivs |= $CLIENT_OK; |
| |
} |
| |
if(isManager()) { |
| |
$requesterprivs |= $MANAGER_OK; |
| |
} |
| |
if($NeedEncode && (!$wasenc)) { |
| |
Debug("Must encode but wasn't: $NeedEncode $wasenc"); |
| |
$ok = 0; |
| |
} |
| |
if(($ClientTypes & $requesterprivs) == 0) { |
| |
Debug("Client not privileged to do this operation"); |
| |
$ok = 0; |
| |
} |
| |
|
| |
if($ok) { |
| |
Debug("Dispatching to handler $command $tail"); |
| |
$KeepGoing = &$Handler($command, $tail, $client); |
| |
} else { |
| |
Debug("Refusing to dispatch because ok is false"); |
| |
Failure($client, "refused", $userinput); |
| |
} |
| |
|
| |
|
| |
# ------------------------------------------------------------- unknown command |
| |
|
| |
} else { |
| |
# unknown command |
| |
Failure($client, "unknown_cmd\n", $userinput); |
| |
} |
| |
|
| |
return $KeepGoing; |
| |
} |
| |
|
| |
|
| |
# |
| |
# GetCertificate: Given a transaction that requires a certificate, |
| |
# this function will extract the certificate from the transaction |
| |
# request. Note that at this point, the only concept of a certificate |
| |
# is the hostname to which we are connected. |
| |
# |
| |
# Parameter: |
| |
# request - The request sent by our client (this parameterization may |
| |
# need to change when we really use a certificate granting |
| |
# authority. |
| |
# |
| |
sub GetCertificate { |
| |
my $request = shift; |
| |
|
| |
return $clientip; |
| |
} |
| |
|
| |
|
| |
|
| |
# |
| |
# ReadManagerTable: Reads in the current manager table. For now this is |
| |
# done on each manager authentication because: |
| |
# - These authentications are not frequent |
| |
# - This allows dynamic changes to the manager table |
| |
# without the need to signal to the lond. |
| |
# |
| |
|
| |
sub ReadManagerTable { |
| |
|
| |
# Clean out the old table first.. |
| |
|
| |
foreach my $key (keys %managers) { |
| |
delete $managers{$key}; |
| |
} |
| |
|
| |
my $tablename = $perlvar{'lonTabDir'}."/managers.tab"; |
| |
if (!open (MANAGERS, $tablename)) { |
| |
logthis('<font color="red">No manager table. Nobody can manage!!</font>'); |
| |
return; |
| |
} |
| |
while(my $host = <MANAGERS>) { |
| |
chomp($host); |
| |
if ($host =~ "^#") { # Comment line. |
| |
logthis('<font color="green"> Skipping line: '. "$host</font>\n"); |
| |
next; |
| |
} |
| |
if (!defined $hostip{$host}) { # This is a non cluster member |
| |
# The entry is of the form: |
| |
# cluname:hostname |
| |
# cluname - A 'cluster hostname' is needed in order to negotiate |
| |
# the host key. |
| |
# hostname- The dns name of the host. |
| |
# |
| |
my($cluname, $dnsname) = split(/:/, $host); |
| |
|
| |
my $ip = gethostbyname($dnsname); |
| |
if(defined($ip)) { # bad names don't deserve entry. |
| |
my $hostip = inet_ntoa($ip); |
| |
$managers{$hostip} = $cluname; |
| |
logthis('<font color="green"> registering manager '. |
| |
"$dnsname as $cluname with $hostip </font>\n"); |
| |
} |
| |
} else { |
| |
logthis('<font color="green"> existing host'." $host</font>\n"); |
| |
$managers{$hostip{$host}} = $host; # Use info from cluster tab if clumemeber |
| |
} |
| |
} |
| |
} |
| |
|
| |
# |
| |
# ValidManager: Determines if a given certificate represents a valid manager. |
| |
# in this primitive implementation, the 'certificate' is |
| |
# just the connecting loncapa client name. This is checked |
| |
# against a valid client list in the configuration. |
| |
# |
| |
# |
| |
sub ValidManager { |
| |
my $certificate = shift; |
| |
|
| |
return isManager; |
| |
} |
| |
# |
| |
# CopyFile: Called as part of the process of installing a |
| |
# new configuration file. This function copies an existing |
| |
# file to a backup file. |
| |
# Parameters: |
| |
# oldfile - Name of the file to backup. |
| |
# newfile - Name of the backup file. |
| |
# Return: |
| |
# 0 - Failure (errno has failure reason). |
| |
# 1 - Success. |
| |
# |
| |
sub CopyFile { |
| |
my $oldfile = shift; |
| |
my $newfile = shift; |
| |
|
| |
# The file must exist: |
| |
|
| |
if(-e $oldfile) { |
| |
|
| |
# Read the old file. |
| |
|
| |
my $oldfh = IO::File->new("< $oldfile"); |
| |
if(!$oldfh) { |
| |
return 0; |
| |
} |
| |
my @contents = <$oldfh>; # Suck in the entire file. |
| |
|
| |
# write the backup file: |
| |
|
| |
my $newfh = IO::File->new("> $newfile"); |
| |
if(!(defined $newfh)){ |
| |
return 0; |
| |
} |
| |
my $lines = scalar @contents; |
| |
for (my $i =0; $i < $lines; $i++) { |
| |
print $newfh ($contents[$i]); |
| |
} |
| |
|
| |
$oldfh->close; |
| |
$newfh->close; |
| |
|
| |
chmod(0660, $newfile); |
| |
|
| |
return 1; |
| |
|
| |
} else { |
| |
return 0; |
| |
} |
| |
} |
| |
# |
| |
# Host files are passed out with externally visible host IPs. |
| |
# If, for example, we are behind a fire-wall or NAT host, our |
| |
# internally visible IP may be different than the externally |
| |
# visible IP. Therefore, we always adjust the contents of the |
| |
# host file so that the entry for ME is the IP that we believe |
| |
# we have. At present, this is defined as the entry that |
| |
# DNS has for us. If by some chance we are not able to get a |
| |
# DNS translation for us, then we assume that the host.tab file |
| |
# is correct. |
| |
# BUGBUGBUG - in the future, we really should see if we can |
| |
# easily query the interface(s) instead. |
| |
# Parameter(s): |
| |
# contents - The contents of the host.tab to check. |
| |
# Returns: |
| |
# newcontents - The adjusted contents. |
| |
# |
| |
# |
| |
sub AdjustHostContents { |
| |
my $contents = shift; |
| |
my $adjusted; |
| |
my $me = $perlvar{'lonHostID'}; |
| |
|
| |
foreach my $line (split(/\n/,$contents)) { |
| |
if(!(($line eq "") || ($line =~ /^ *\#/) || ($line =~ /^ *$/))) { |
| |
chomp($line); |
| |
my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon)=split(/:/,$line); |
| |
if ($id eq $me) { |
| |
my $ip = gethostbyname($name); |
| |
my $ipnew = inet_ntoa($ip); |
| |
$ip = $ipnew; |
| |
# Reconstruct the host line and append to adjusted: |
| |
|
| |
my $newline = "$id:$domain:$role:$name:$ip"; |
| |
if($maxcon ne "") { # Not all hosts have loncnew tuning params |
| |
$newline .= ":$maxcon:$idleto:$mincon"; |
| |
} |
| |
$adjusted .= $newline."\n"; |
| |
|
| |
} else { # Not me, pass unmodified. |
| |
$adjusted .= $line."\n"; |
| |
} |
| |
} else { # Blank or comment never re-written. |
| |
$adjusted .= $line."\n"; # Pass blanks and comments as is. |
| |
} |
| |
} |
| |
return $adjusted; |
| |
} |
| |
# |
| |
# InstallFile: Called to install an administrative file: |
| |
# - The file is created with <name>.tmp |
| |
# - The <name>.tmp file is then mv'd to <name> |
| |
# This lugubrious procedure is done to ensure that we are never without |
| |
# a valid, even if dated, version of the file regardless of who crashes |
| |
# and when the crash occurs. |
| |
# |
| |
# Parameters: |
| |
# Name of the file |
| |
# File Contents. |
| |
# Return: |
| |
# nonzero - success. |
| |
# 0 - failure and $! has an errno. |
| |
# |
| |
sub InstallFile { |
| |
my $Filename = shift; |
| |
my $Contents = shift; |
| |
my $TempFile = $Filename.".tmp"; |
| |
|
| |
# Open the file for write: |
| |
|
| |
my $fh = IO::File->new("> $TempFile"); # Write to temp. |
| |
if(!(defined $fh)) { |
| |
&logthis('<font color="red"> Unable to create '.$TempFile."</font>"); |
| |
return 0; |
| |
} |
| |
# write the contents of the file: |
| |
|
| |
print $fh ($Contents); |
| |
$fh->close; # In case we ever have a filesystem w. locking |
| |
|
| |
chmod(0660, $TempFile); |
| |
|
| |
# Now we can move install the file in position. |
| |
|
| |
move($TempFile, $Filename); |
| |
|
| |
return 1; |
| |
} |
| |
# |
| |
# ConfigFileFromSelector: converts a configuration file selector |
| |
# (one of host or domain at this point) into a |
| |
# configuration file pathname. |
| |
# |
| |
# Parameters: |
| |
# selector - Configuration file selector. |
| |
# Returns: |
| |
# Full path to the file or undef if the selector is invalid. |
| |
# |
| |
sub ConfigFileFromSelector { |
| |
my $selector = shift; |
| |
my $tablefile; |
| |
|
| |
my $tabledir = $perlvar{'lonTabDir'}.'/'; |
| |
if ($selector eq "hosts") { |
| |
$tablefile = $tabledir."hosts.tab"; |
| |
} elsif ($selector eq "domain") { |
| |
$tablefile = $tabledir."domain.tab"; |
| |
} else { |
| |
return undef; |
| |
} |
| |
return $tablefile; |
| |
|
| |
} |
| |
# |
| |
# PushFile: Called to do an administrative push of a file. |
| |
# - Ensure the file being pushed is one we support. |
| |
# - Backup the old file to <filename.saved> |
| |
# - Separate the contents of the new file out from the |
| |
# rest of the request. |
| |
# - Write the new file. |
| |
# Parameter: |
| |
# Request - The entire user request. This consists of a : separated |
| |
# string pushfile:tablename:contents. |
| |
# NOTE: The contents may have :'s in it as well making things a bit |
| |
# more interesting... but not much. |
| |
# Returns: |
| |
# String to send to client ("ok" or "refused" if bad file). |
| |
# |
| |
sub PushFile { |
| |
my $request = shift; |
| |
my ($command, $filename, $contents) = split(":", $request, 3); |
| |
|
| |
# At this point in time, pushes for only the following tables are |
| |
# supported: |
| |
# hosts.tab ($filename eq host). |
| |
# domain.tab ($filename eq domain). |
| |
# Construct the destination filename or reject the request. |
| |
# |
| |
# lonManage is supposed to ensure this, however this session could be |
| |
# part of some elaborate spoof that managed somehow to authenticate. |
| |
# |
| |
|
| |
|
| |
my $tablefile = ConfigFileFromSelector($filename); |
| |
if(! (defined $tablefile)) { |
| |
return "refused"; |
| |
} |
| |
# |
| |
# >copy< the old table to the backup table |
| |
# don't rename in case system crashes/reboots etc. in the time |
| |
# window between a rename and write. |
| |
# |
| |
my $backupfile = $tablefile; |
| |
$backupfile =~ s/\.tab$/.old/; |
| |
if(!CopyFile($tablefile, $backupfile)) { |
| |
&logthis('<font color="green"> CopyFile from '.$tablefile." to ".$backupfile." failed </font>"); |
| |
return "error:$!"; |
| |
} |
| |
&logthis('<font color="green"> Pushfile: backed up ' |
| |
.$tablefile." to $backupfile</font>"); |
| |
|
| |
# If the file being pushed is the host file, we adjust the entry for ourself so that the |
| |
# IP will be our current IP as looked up in dns. Note this is only 99% good as it's possible |
| |
# to conceive of conditions where we don't have a DNS entry locally. This is possible in a |
| |
# network sense but it doesn't make much sense in a LonCAPA sense so we ignore (for now) |
| |
# that possibilty. |
| |
|
| |
if($filename eq "host") { |
| |
$contents = AdjustHostContents($contents); |
| |
} |
| |
|
| |
# Install the new file: |
| |
|
| |
if(!InstallFile($tablefile, $contents)) { |
| |
&logthis('<font color="red"> Pushfile: unable to install ' |
| |
.$tablefile." $! </font>"); |
| |
return "error:$!"; |
| |
} else { |
| |
&logthis('<font color="green"> Installed new '.$tablefile |
| |
."</font>"); |
| |
|
| |
} |
| |
|
| |
|
| |
# Indicate success: |
| |
|
| |
return "ok"; |
| |
|
| |
} |
| |
|
| |
# |
| |
# Called to re-init either lonc or lond. |
| |
# |
| |
# Parameters: |
| |
# request - The full request by the client. This is of the form |
| |
# reinit:<process> |
| |
# where <process> is allowed to be either of |
| |
# lonc or lond |
| |
# |
| |
# Returns: |
| |
# The string to be sent back to the client either: |
| |
# ok - Everything worked just fine. |
| |
# error:why - There was a failure and why describes the reason. |
| |
# |
| |
# |
| |
sub ReinitProcess { |
| |
my $request = shift; |
| |
|
| |
|
| |
# separate the request (reinit) from the process identifier and |
| |
# validate it producing the name of the .pid file for the process. |
| |
# |
| |
# |
| |
my ($junk, $process) = split(":", $request); |
| |
my $processpidfile = $perlvar{'lonDaemons'}.'/logs/'; |
| |
if($process eq 'lonc') { |
| |
$processpidfile = $processpidfile."lonc.pid"; |
| |
if (!open(PIDFILE, "< $processpidfile")) { |
| |
return "error:Open failed for $processpidfile"; |
| |
} |
| |
my $loncpid = <PIDFILE>; |
| |
close(PIDFILE); |
| |
logthis('<font color="red"> Reinitializing lonc pid='.$loncpid |
| |
."</font>"); |
| |
kill("USR2", $loncpid); |
| |
} elsif ($process eq 'lond') { |
| |
logthis('<font color="red"> Reinitializing self (lond) </font>'); |
| |
&UpdateHosts; # Lond is us!! |
| |
} else { |
| |
&logthis('<font color="yellow" Invalid reinit request for '.$process |
| |
."</font>"); |
| |
return "error:Invalid process identifier $process"; |
| |
} |
| |
return 'ok'; |
| |
} |
| |
# Validate a line in a configuration file edit script: |
| |
# Validation includes: |
| |
# - Ensuring the command is valid. |
| |
# - Ensuring the command has sufficient parameters |
| |
# Parameters: |
| |
# scriptline - A line to validate (\n has been stripped for what it's worth). |
| |
# |
| |
# Return: |
| |
# 0 - Invalid scriptline. |
| |
# 1 - Valid scriptline |
| |
# NOTE: |
| |
# Only the command syntax is checked, not the executability of the |
| |
# command. |
| |
# |
| |
sub isValidEditCommand { |
| |
my $scriptline = shift; |
| |
|
| |
# Line elements are pipe separated: |
| |
|
| |
my ($command, $key, $newline) = split(/\|/, $scriptline); |
| |
&logthis('<font color="green"> isValideditCommand checking: '. |
| |
"Command = '$command', Key = '$key', Newline = '$newline' </font>\n"); |
| |
|
| |
if ($command eq "delete") { |
| |
# |
| |
# key with no newline. |
| |
# |
| |
if( ($key eq "") || ($newline ne "")) { |
| |
return 0; # Must have key but no newline. |
| |
} else { |
| |
return 1; # Valid syntax. |
| |
} |
| |
} elsif ($command eq "replace") { |
| |
# |
| |
# key and newline: |
| |
# |
| |
if (($key eq "") || ($newline eq "")) { |
| |
return 0; |
| |
} else { |
| |
return 1; |
| |
} |
| |
} elsif ($command eq "append") { |
| |
if (($key ne "") && ($newline eq "")) { |
| |
return 1; |
| |
} else { |
| |
return 0; |
| |
} |
| |
} else { |
| |
return 0; # Invalid command. |
| |
} |
| |
return 0; # Should not get here!!! |
| |
} |
| |
# |
| |
# ApplyEdit - Applies an edit command to a line in a configuration |
| |
# file. It is the caller's responsiblity to validate the |
| |
# edit line. |
| |
# Parameters: |
| |
# $directive - A single edit directive to apply. |
| |
# Edit directives are of the form: |
| |
# append|newline - Appends a new line to the file. |
| |
# replace|key|newline - Replaces the line with key value 'key' |
| |
# delete|key - Deletes the line with key value 'key'. |
| |
# $editor - A config file editor object that contains the |
| |
# file being edited. |
| |
# |
| |
sub ApplyEdit { |
| |
my $directive = shift; |
| |
my $editor = shift; |
| |
|
| |
# Break the directive down into its command and its parameters |
| |
# (at most two at this point. The meaning of the parameters, if in fact |
| |
# they exist depends on the command). |
| |
|
| |
my ($command, $p1, $p2) = split(/\|/, $directive); |
| |
|
| |
if($command eq "append") { |
| |
$editor->Append($p1); # p1 - key p2 null. |
| |
} elsif ($command eq "replace") { |
| |
$editor->ReplaceLine($p1, $p2); # p1 - key p2 = newline. |
| |
} elsif ($command eq "delete") { |
| |
$editor->DeleteLine($p1); # p1 - key p2 null. |
| |
} else { # Should not get here!!! |
| |
die "Invalid command given to ApplyEdit $command"; |
| |
} |
| |
} |
| |
# |
| |
# AdjustOurHost: |
| |
# Adjusts a host file stored in a configuration file editor object |
| |
# for the true IP address of this host. This is necessary for hosts |
| |
# that live behind a firewall. |
| |
# Those hosts have a publicly distributed IP of the firewall, but |
| |
# internally must use their actual IP. We assume that a given |
| |
# host only has a single IP interface for now. |
| |
# Formal Parameters: |
| |
# editor - The configuration file editor to adjust. This |
| |
# editor is assumed to contain a hosts.tab file. |
| |
# Strategy: |
| |
# - Figure out our hostname. |
| |
# - Lookup the entry for this host. |
| |
# - Modify the line to contain our IP |
| |
# - Do a replace for this host. |
| |
sub AdjustOurHost { |
| |
my $editor = shift; |
| |
|
| |
# figure out who I am. |
| |
|
| |
my $myHostName = $perlvar{'lonHostID'}; # LonCAPA hostname. |
| |
|
| |
# Get my host file entry. |
| |
|
| |
my $ConfigLine = $editor->Find($myHostName); |
| |
if(! (defined $ConfigLine)) { |
| |
die "AdjustOurHost - no entry for me in hosts file $myHostName"; |
| |
} |
| |
# figure out my IP: |
| |
# Use the config line to get my hostname. |
| |
# Use gethostbyname to translate that into an IP address. |
| |
# |
| |
my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon) = split(/:/,$ConfigLine); |
| |
my $BinaryIp = gethostbyname($name); |
| |
my $ip = inet_ntoa($ip); |
| |
# |
| |
# Reassemble the config line from the elements in the list. |
| |
# Note that if the loncnew items were not present before, they will |
| |
# be now even if they would be empty |
| |
# |
| |
my $newConfigLine = $id; |
| |
foreach my $item ($domain, $role, $name, $ip, $maxcon, $idleto, $mincon) { |
| |
$newConfigLine .= ":".$item; |
| |
} |
| |
# Replace the line: |
| |
|
| |
$editor->ReplaceLine($id, $newConfigLine); |
| |
|
| |
} |
| |
# |
| |
# ReplaceConfigFile: |
| |
# Replaces a configuration file with the contents of a |
| |
# configuration file editor object. |
| |
# This is done by: |
| |
# - Copying the target file to <filename>.old |
| |
# - Writing the new file to <filename>.tmp |
| |
# - Moving <filename.tmp> -> <filename> |
| |
# This laborious process ensures that the system is never without |
| |
# a configuration file that's at least valid (even if the contents |
| |
# may be dated). |
| |
# Parameters: |
| |
# filename - Name of the file to modify... this is a full path. |
| |
# editor - Editor containing the file. |
| |
# |
| |
sub ReplaceConfigFile { |
| |
my $filename = shift; |
| |
my $editor = shift; |
| |
|
| |
CopyFile ($filename, $filename.".old"); |
| |
|
| |
my $contents = $editor->Get(); # Get the contents of the file. |
| |
|
| |
InstallFile($filename, $contents); |
| |
} |
| |
# |
| |
# |
| |
# Called to edit a configuration table file |
| |
# Parameters: |
| |
# request - The entire command/request sent by lonc or lonManage |
| |
# Return: |
| |
# The reply to send to the client. |
| |
# |
| |
sub EditFile { |
| |
my $request = shift; |
| |
|
| |
# Split the command into it's pieces: edit:filetype:script |
| |
|
| |
my ($request, $filetype, $script) = split(/:/, $request,3); # : in script |
| |
|
| |
# Check the pre-coditions for success: |
| |
|
| |
if($request != "edit") { # Something is amiss afoot alack. |
| |
return "error:edit request detected, but request != 'edit'\n"; |
| |
} |
| |
if( ($filetype ne "hosts") && |
| |
($filetype ne "domain")) { |
| |
return "error:edit requested with invalid file specifier: $filetype \n"; |
| |
} |
| |
|
| |
# Split the edit script and check it's validity. |
| |
|
| |
my @scriptlines = split(/\n/, $script); # one line per element. |
| |
my $linecount = scalar(@scriptlines); |
| |
for(my $i = 0; $i < $linecount; $i++) { |
| |
chomp($scriptlines[$i]); |
| |
if(!isValidEditCommand($scriptlines[$i])) { |
| |
return "error:edit with bad script line: '$scriptlines[$i]' \n"; |
| |
} |
| |
} |
| |
|
| |
# Execute the edit operation. |
| |
# - Create a config file editor for the appropriate file and |
| |
# - execute each command in the script: |
| |
# |
| |
my $configfile = ConfigFileFromSelector($filetype); |
| |
if (!(defined $configfile)) { |
| |
return "refused\n"; |
| |
} |
| |
my $editor = ConfigFileEdit->new($configfile); |
| |
|
| |
for (my $i = 0; $i < $linecount; $i++) { |
| |
ApplyEdit($scriptlines[$i], $editor); |
| |
} |
| |
# If the file is the host file, ensure that our host is |
| |
# adjusted to have our ip: |
| |
# |
| |
if($filetype eq "host") { |
| |
AdjustOurHost($editor); |
| |
} |
| |
# Finally replace the current file with our file. |
| |
# |
| |
ReplaceConfigFile($configfile, $editor); |
| |
|
| |
return "ok\n"; |
| |
} |
| |
# |
| |
# Convert an error return code from lcpasswd to a string value. |
| |
# |
| |
sub lcpasswdstrerror { |
| |
my $ErrorCode = shift; |
| |
if(($ErrorCode < 0) || ($ErrorCode > $lastpwderror)) { |
| |
return "lcpasswd Unrecognized error return value ".$ErrorCode; |
| |
} else { |
| |
return $passwderrors[$ErrorCode]; |
| |
} |
| |
} |
| |
|
| |
# |
| |
# Convert an error return code from lcuseradd to a string value: |
| |
# |
| |
sub lcuseraddstrerror { |
| |
my $ErrorCode = shift; |
| |
if(($ErrorCode < 0) || ($ErrorCode > $lastadderror)) { |
| |
return "lcuseradd - Unrecognized error code: ".$ErrorCode; |
| |
} else { |
| |
return $adderrors[$ErrorCode]; |
| |
} |
| |
} |
| |
|
| |
# grabs exception and records it to log before exiting |
| |
sub catchexception { |
| |
my ($error)=@_; |
| $SIG{'QUIT'}='DEFAULT'; |
$SIG{'QUIT'}='DEFAULT'; |
| $SIG{__DIE__}='DEFAULT'; |
$SIG{__DIE__}='DEFAULT'; |
| |
&status("Catching exception"); |
| &logthis("<font color=red>CRITICAL: " |
&logthis("<font color=red>CRITICAL: " |
| ."ABNORMAL EXIT. Child $$ for server $wasserver died through " |
."ABNORMAL EXIT. Child $$ for server $thisserver died through " |
| ."\_\_DIE\_\_ with this parameter->[$message]</font>"); |
."a crash with this error msg->[$error]</font>"); |
| if ($client) { print $client "error: $message\n"; } |
&logthis('Famous last words: '.$status.' - '.$lastlog); |
| die($message); |
if ($client) { print $client "error: $error\n"; } |
| |
$server->close(); |
| |
die($error); |
| } |
} |
| |
|
| |
sub timeout { |
| |
&status("Handling Timeout"); |
| |
&logthis("<font color=ref>CRITICAL: TIME OUT ".$$."</font>"); |
| |
&catchexception('Timeout'); |
| |
} |
| # -------------------------------- Set signal handlers to record abnormal exits |
# -------------------------------- Set signal handlers to record abnormal exits |
| |
|
| $SIG{'QUIT'}=\&catchexception; |
$SIG{'QUIT'}=\&catchexception; |
| $SIG{__DIE__}=\&catchexception; |
$SIG{__DIE__}=\&catchexception; |
| |
|
| # ------------------------------------ Read httpd access.conf and get variables |
# ---------------------------------- Read loncapa_apache.conf and loncapa.conf |
| |
&status("Read loncapa.conf and loncapa_apache.conf"); |
| open (CONFIG,"/etc/httpd/conf/access.conf") |
my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf'); |
| || catchdie "Can't read access.conf"; |
%perlvar=%{$perlvarref}; |
| |
undef $perlvarref; |
| while ($configline=<CONFIG>) { |
|
| if ($configline =~ /PerlSetVar/) { |
# ----------------------------- Make sure this process is running from user=www |
| my ($dummy,$varname,$varvalue)=split(/\s+/,$configline); |
my $wwwid=getpwnam('www'); |
| chomp($varvalue); |
if ($wwwid!=$<) { |
| $perlvar{$varname}=$varvalue; |
my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}"; |
| } |
my $subj="LON: $currenthostid User ID mismatch"; |
| |
system("echo 'User ID mismatch. lond must be run as user www.' |\ |
| |
mailto $emailto -s '$subj' > /dev/null"); |
| |
exit 1; |
| } |
} |
| close(CONFIG); |
|
| |
|
| # --------------------------------------------- Check if other instance running |
# --------------------------------------------- Check if other instance running |
| |
|
| my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid"; |
my $pidfile="$perlvar{'lonDaemons'}/logs/lond.pid"; |
| |
|
| if (-e $pidfile) { |
if (-e $pidfile) { |
| my $lfh=IO::File->new("$pidfile"); |
my $lfh=IO::File->new("$pidfile"); |
| my $pide=<$lfh>; |
my $pide=<$lfh>; |
| chomp($pide); |
chomp($pide); |
| if (kill 0 => $pide) { catchdie "already running"; } |
if (kill 0 => $pide) { die "already running"; } |
| } |
} |
| |
|
| $PREFORK=4; # number of children to maintain, at least four spare |
|
| |
|
| # ------------------------------------------------------------- Read hosts file |
# ------------------------------------------------------------- Read hosts file |
| |
|
| open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") |
|
| || catchdie "Can't read host file"; |
|
| |
|
| while ($configline=<CONFIG>) { |
|
| my ($id,$domain,$role,$name,$ip)=split(/:/,$configline); |
|
| chomp($ip); |
|
| $hostid{$ip}=$id; |
|
| if ($id eq $perlvar{'lonHostID'}) { $thisserver=$name; } |
|
| $PREFORK++; |
|
| } |
|
| close(CONFIG); |
|
| |
|
| # establish SERVER socket, bind and listen. |
# establish SERVER socket, bind and listen. |
| $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'}, |
$server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'}, |
|
Line 107 $server = IO::Socket::INET->new(LocalPor
|
Line 3412 $server = IO::Socket::INET->new(LocalPor
|
| Proto => 'tcp', |
Proto => 'tcp', |
| Reuse => 1, |
Reuse => 1, |
| Listen => 10 ) |
Listen => 10 ) |
| or catchdie "making socket: $@\n"; |
or die "making socket: $@\n"; |
| |
|
| # --------------------------------------------------------- Do global variables |
# --------------------------------------------------------- Do global variables |
| |
|
| # global variables |
# global variables |
| |
|
| $MAX_CLIENTS_PER_CHILD = 5; # number of clients each child should |
my %children = (); # keys are current child process IDs |
| # process |
my $children = 0; # current number of children |
| %children = (); # keys are current child process IDs |
|
| $children = 0; # current number of children |
|
| |
|
| sub REAPER { # takes care of dead children |
sub REAPER { # takes care of dead children |
| $SIG{CHLD} = \&REAPER; |
$SIG{CHLD} = \&REAPER; |
| |
&status("Handling child death"); |
| my $pid = wait; |
my $pid = wait; |
| $children --; |
if (defined($children{$pid})) { |
| &logthis("Child $pid died"); |
&logthis("Child $pid died"); |
| delete $children{$pid}; |
$children --; |
| |
delete $children{$pid}; |
| |
} else { |
| |
&logthis("Unknown Child $pid died"); |
| |
} |
| |
&status("Finished Handling child death"); |
| } |
} |
| |
|
| sub HUNTSMAN { # signal handler for SIGINT |
sub HUNTSMAN { # signal handler for SIGINT |
| |
&status("Killing children (INT)"); |
| local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children |
local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children |
| kill 'INT' => keys %children; |
kill 'INT' => keys %children; |
| |
&logthis("Free socket: ".shutdown($server,2)); # free up socket |
| my $execdir=$perlvar{'lonDaemons'}; |
my $execdir=$perlvar{'lonDaemons'}; |
| unlink("$execdir/logs/lond.pid"); |
unlink("$execdir/logs/lond.pid"); |
| &logthis("<font color=red>CRITICAL: Shutting down</font>"); |
&logthis("<font color=red>CRITICAL: Shutting down</font>"); |
| |
&status("Done killing children"); |
| exit; # clean up with dignity |
exit; # clean up with dignity |
| } |
} |
| |
|
| sub HUPSMAN { # signal handler for SIGHUP |
sub HUPSMAN { # signal handler for SIGHUP |
| local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children |
local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children |
| |
&status("Killing children for restart (HUP)"); |
| kill 'INT' => keys %children; |
kill 'INT' => keys %children; |
| close($server); # free up socket |
&logthis("Free socket: ".shutdown($server,2)); # free up socket |
| &logthis("<font color=red>CRITICAL: Restarting</font>"); |
&logthis("<font color=red>CRITICAL: Restarting</font>"); |
| my $execdir=$perlvar{'lonDaemons'}; |
my $execdir=$perlvar{'lonDaemons'}; |
| |
unlink("$execdir/logs/lond.pid"); |
| |
&status("Restarting self (HUP)"); |
| exec("$execdir/lond"); # here we go again |
exec("$execdir/lond"); # here we go again |
| } |
} |
| |
|
| |
# |
| |
# Kill off hashes that describe the host table prior to re-reading it. |
| |
# Hashes affected are: |
| |
# %hostid, %hostdom %hostip |
| |
# |
| |
sub KillHostHashes { |
| |
foreach my $key (keys %hostid) { |
| |
delete $hostid{$key}; |
| |
} |
| |
foreach my $key (keys %hostdom) { |
| |
delete $hostdom{$key}; |
| |
} |
| |
foreach my $key (keys %hostip) { |
| |
delete $hostip{$key}; |
| |
} |
| |
} |
| |
# |
| |
# Read in the host table from file and distribute it into the various hashes: |
| |
# |
| |
# - %hostid - Indexed by IP, the loncapa hostname. |
| |
# - %hostdom - Indexed by loncapa hostname, the domain. |
| |
# - %hostip - Indexed by hostid, the Ip address of the host. |
| |
sub ReadHostTable { |
| |
|
| |
open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file"; |
| |
|
| |
while (my $configline=<CONFIG>) { |
| |
my ($id,$domain,$role,$name,$ip)=split(/:/,$configline); |
| |
chomp($ip); $ip=~s/\D+$//; |
| |
$hostid{$ip}=$id; |
| |
$hostdom{$id}=$domain; |
| |
$hostip{$id}=$ip; |
| |
if ($id eq $perlvar{'lonHostID'}) { $thisserver=$name; } |
| |
} |
| |
close(CONFIG); |
| |
} |
| |
# |
| |
# Reload the Apache daemon's state. |
| |
# This is done by invoking /home/httpd/perl/apachereload |
| |
# a setuid perl script that can be root for us to do this job. |
| |
# |
| |
sub ReloadApache { |
| |
my $execdir = $perlvar{'lonDaemons'}; |
| |
my $script = $execdir."/apachereload"; |
| |
system($script); |
| |
} |
| |
|
| |
# |
| |
# Called in response to a USR2 signal. |
| |
# - Reread hosts.tab |
| |
# - All children connected to hosts that were removed from hosts.tab |
| |
# are killed via SIGINT |
| |
# - All children connected to previously existing hosts are sent SIGUSR1 |
| |
# - Our internal hosts hash is updated to reflect the new contents of |
| |
# hosts.tab causing connections from hosts added to hosts.tab to |
| |
# now be honored. |
| |
# |
| |
sub UpdateHosts { |
| |
&status("Reload hosts.tab"); |
| |
logthis('<font color="blue"> Updating connections </font>'); |
| |
# |
| |
# The %children hash has the set of IP's we currently have children |
| |
# on. These need to be matched against records in the hosts.tab |
| |
# Any ip's no longer in the table get killed off they correspond to |
| |
# either dropped or changed hosts. Note that the re-read of the table |
| |
# will take care of new and changed hosts as connections come into being. |
| |
|
| |
|
| |
KillHostHashes; |
| |
ReadHostTable; |
| |
|
| |
foreach my $child (keys %children) { |
| |
my $childip = $children{$child}; |
| |
if(!$hostid{$childip}) { |
| |
logthis('<font color="blue"> UpdateHosts killing child ' |
| |
." $child for ip $childip </font>"); |
| |
kill('INT', $child); |
| |
} else { |
| |
logthis('<font color="green"> keeping child for ip ' |
| |
." $childip (pid=$child) </font>"); |
| |
} |
| |
} |
| |
ReloadApache; |
| |
&status("Finished reloading hosts.tab"); |
| |
} |
| |
|
| |
|
| |
sub checkchildren { |
| |
&status("Checking on the children (sending signals)"); |
| |
&initnewstatus(); |
| |
&logstatus(); |
| |
&logthis('Going to check on the children'); |
| |
my $docdir=$perlvar{'lonDocRoot'}; |
| |
foreach (sort keys %children) { |
| |
sleep 1; |
| |
unless (kill 'USR1' => $_) { |
| |
&logthis ('Child '.$_.' is dead'); |
| |
&logstatus($$.' is dead'); |
| |
} |
| |
} |
| |
sleep 5; |
| |
$SIG{ALRM} = sub { die "timeout" }; |
| |
$SIG{__DIE__} = 'DEFAULT'; |
| |
&status("Checking on the children (waiting for reports)"); |
| |
foreach (sort keys %children) { |
| |
unless (-e "$docdir/lon-status/londchld/$_.txt") { |
| |
eval { |
| |
alarm(300); |
| |
&logthis('Child '.$_.' did not respond'); |
| |
kill 9 => $_; |
| |
#$emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}"; |
| |
#$subj="LON: $currenthostid killed lond process $_"; |
| |
#my $result=`echo 'Killed lond process $_.' | mailto $emailto -s '$subj' > /dev/null`; |
| |
#$execdir=$perlvar{'lonDaemons'}; |
| |
#$result=`/bin/cp $execdir/logs/lond.log $execdir/logs/lond.log.$_`; |
| |
alarm(0); |
| |
} |
| |
} |
| |
} |
| |
$SIG{ALRM} = 'DEFAULT'; |
| |
$SIG{__DIE__} = \&catchexception; |
| |
&status("Finished checking children"); |
| |
} |
| |
|
| # --------------------------------------------------------------------- Logging |
# --------------------------------------------------------------------- Logging |
| |
|
| sub logthis { |
sub logthis { |
|
Line 152 sub logthis {
|
Line 3591 sub logthis {
|
| my $fh=IO::File->new(">>$execdir/logs/lond.log"); |
my $fh=IO::File->new(">>$execdir/logs/lond.log"); |
| my $now=time; |
my $now=time; |
| my $local=localtime($now); |
my $local=localtime($now); |
| |
$lastlog=$local.': '.$message; |
| print $fh "$local ($$): $message\n"; |
print $fh "$local ($$): $message\n"; |
| } |
} |
| |
|
| |
# ------------------------- Conditional log if $DEBUG true. |
| |
sub Debug { |
| |
my $message = shift; |
| |
if($DEBUG) { |
| |
&logthis($message); |
| |
} |
| |
} |
| |
|
| |
# |
| |
# Sub to do replies to client.. this gives a hook for some |
| |
# debug tracing too: |
| |
# Parameters: |
| |
# fd - File open on client. |
| |
# reply - Text to send to client. |
| |
# request - Original request from client. |
| |
# |
| |
# Note: This increments Transactions |
| |
# |
| |
sub Reply { |
| |
alarm(120); |
| |
my $fd = shift; |
| |
my $reply = shift; |
| |
my $request = shift; |
| |
|
| |
print $fd $reply; |
| |
Debug("Request was $request Reply was $reply"); |
| |
|
| |
$Transactions++; |
| |
alarm(0); |
| |
|
| |
|
| |
} |
| |
# |
| |
# Sub to report a failure. |
| |
# This function: |
| |
# - Increments the failure statistic counters. |
| |
# - Invokes Reply to send the error message to the client. |
| |
# Parameters: |
| |
# fd - File descriptor open on the client |
| |
# reply - Reply text to emit. |
| |
# request - The original request message (used by Reply |
| |
# to debug if that's enabled. |
| |
# Implicit outputs: |
| |
# $Failures- The number of failures is incremented. |
| |
# Reply (invoked here) sends a message to the |
| |
# client: |
| |
# |
| |
sub Failure { |
| |
my $fd = shift; |
| |
my $reply = shift; |
| |
my $request = shift; |
| |
|
| |
$Failures++; |
| |
Reply($fd, $reply, $request); # That's simple eh? |
| |
} |
| |
# ------------------------------------------------------------------ Log status |
| |
|
| |
sub logstatus { |
| |
&status("Doing logging"); |
| |
my $docdir=$perlvar{'lonDocRoot'}; |
| |
{ |
| |
my $fh=IO::File->new(">>$docdir/lon-status/londstatus.txt"); |
| |
print $fh $$."\t".$currenthostid."\t".$status."\t".$lastlog."\n"; |
| |
$fh->close(); |
| |
} |
| |
&status("Finished londstatus.txt"); |
| |
{ |
| |
my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt"); |
| |
print $fh $status."\n".$lastlog."\n".time; |
| |
$fh->close(); |
| |
} |
| |
ResetStatistics; |
| |
&status("Finished logging"); |
| |
|
| |
} |
| |
|
| |
sub initnewstatus { |
| |
my $docdir=$perlvar{'lonDocRoot'}; |
| |
my $fh=IO::File->new(">$docdir/lon-status/londstatus.txt"); |
| |
my $now=time; |
| |
my $local=localtime($now); |
| |
print $fh "LOND status $local - parent $$\n\n"; |
| |
opendir(DIR,"$docdir/lon-status/londchld"); |
| |
while (my $filename=readdir(DIR)) { |
| |
unlink("$docdir/lon-status/londchld/$filename"); |
| |
} |
| |
closedir(DIR); |
| |
} |
| |
|
| |
# -------------------------------------------------------------- Status setting |
| |
|
| |
sub status { |
| |
my $what=shift; |
| |
my $now=time; |
| |
my $local=localtime($now); |
| |
my $status = "lond: $what $local "; |
| |
if($Transactions) { |
| |
$status .= " Transactions: $Transactions Failed; $Failures"; |
| |
} |
| |
$0=$status; |
| |
} |
| |
|
| # -------------------------------------------------------- Escape Special Chars |
# -------------------------------------------------------- Escape Special Chars |
| |
|
|
Line 184 sub reconlonc {
|
Line 3725 sub reconlonc {
|
| if (kill 0 => $loncpid) { |
if (kill 0 => $loncpid) { |
| &logthis("lonc at pid $loncpid responding, sending USR1"); |
&logthis("lonc at pid $loncpid responding, sending USR1"); |
| kill USR1 => $loncpid; |
kill USR1 => $loncpid; |
| sleep 1; |
|
| if (-e "$peerfile") { return; } |
|
| &logthis("$peerfile still not there, give it another try"); |
|
| sleep 5; |
|
| if (-e "$peerfile") { return; } |
|
| &logthis( |
|
| "<font color=blue>WARNING: $peerfile still not there, giving up</font>"); |
|
| } else { |
} else { |
| &logthis( |
&logthis("<font color=red>CRITICAL: " |
| "<font color=red>CRITICAL: " |
."lonc at pid $loncpid not responding, giving up</font>"); |
| ."lonc at pid $loncpid not responding, giving up</font>"); |
|
| } |
} |
| } else { |
} else { |
| &logthis('<font color=red>CRITICAL: lonc not running, giving up</font>'); |
&logthis('<font color=red>CRITICAL: lonc not running, giving up</font>'); |
| } |
} |
| } |
} |
| |
|
|
Line 209 sub subreply {
|
Line 3742 sub subreply {
|
| my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile", |
my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile", |
| Type => SOCK_STREAM, |
Type => SOCK_STREAM, |
| Timeout => 10) |
Timeout => 10) |
| or return "con_lost"; |
or return "con_lost"; |
| print $sclient "$cmd\n"; |
print $sclient "$cmd\n"; |
| my $answer=<$sclient>; |
my $answer=<$sclient>; |
| chomp($answer); |
chomp($answer); |
|
Line 218 sub subreply {
|
Line 3751 sub subreply {
|
| } |
} |
| |
|
| sub reply { |
sub reply { |
| my ($cmd,$server)=@_; |
my ($cmd,$server)=@_; |
| my $answer; |
my $answer; |
| if ($server ne $perlvar{'lonHostID'}) { |
if ($server ne $currenthostid) { |
| $answer=subreply($cmd,$server); |
$answer=subreply($cmd,$server); |
| if ($answer eq 'con_lost') { |
if ($answer eq 'con_lost') { |
| $answer=subreply("ping",$server); |
$answer=subreply("ping",$server); |
| if ($answer ne $server) { |
if ($answer ne $server) { |
| &reconlonc("$perlvar{'lonSockDir'}/$server"); |
&logthis("sub reply: answer != server answer is $answer, server is $server"); |
| } |
&reconlonc("$perlvar{'lonSockDir'}/$server"); |
| $answer=subreply($cmd,$server); |
} |
| } |
$answer=subreply($cmd,$server); |
| } else { |
} |
| $answer='self_reply'; |
} else { |
| } |
$answer='self_reply'; |
| return $answer; |
} |
| |
return $answer; |
| } |
} |
| |
|
| # -------------------------------------------------------------- Talk to lonsql |
# -------------------------------------------------------------- Talk to lonsql |
|
Line 251 sub subsqlreply {
|
Line 3785 sub subsqlreply {
|
| my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile", |
my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile", |
| Type => SOCK_STREAM, |
Type => SOCK_STREAM, |
| Timeout => 10) |
Timeout => 10) |
| or return "con_lost"; |
or return "con_lost"; |
| print $sclient "$cmd\n"; |
print $sclient "$cmd\n"; |
| my $answer=<$sclient>; |
my $answer=<$sclient>; |
| chomp($answer); |
chomp($answer); |
|
Line 263 sub subsqlreply {
|
Line 3797 sub subsqlreply {
|
| |
|
| sub propath { |
sub propath { |
| my ($udom,$uname)=@_; |
my ($udom,$uname)=@_; |
| |
Debug("Propath:$udom:$uname"); |
| $udom=~s/\W//g; |
$udom=~s/\W//g; |
| $uname=~s/\W//g; |
$uname=~s/\W//g; |
| |
Debug("Propath2:$udom:$uname"); |
| my $subdir=$uname.'__'; |
my $subdir=$uname.'__'; |
| $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/; |
$subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/; |
| my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname"; |
my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname"; |
| |
Debug("Propath returning $proname"); |
| return $proname; |
return $proname; |
| } |
} |
| |
|
|
Line 288 sub ishome {
|
Line 3825 sub ishome {
|
| # ======================================================= Continue main program |
# ======================================================= Continue main program |
| # ---------------------------------------------------- Fork once and dissociate |
# ---------------------------------------------------- Fork once and dissociate |
| |
|
| $fpid=fork; |
my $fpid=fork; |
| exit if $fpid; |
exit if $fpid; |
| catchdie "Couldn't fork: $!" unless defined ($fpid); |
die "Couldn't fork: $!" unless defined ($fpid); |
| |
|
| POSIX::setsid() or catchdie "Can't start new session: $!"; |
POSIX::setsid() or die "Can't start new session: $!"; |
| |
|
| # ------------------------------------------------------- Write our PID on disk |
# ------------------------------------------------------- Write our PID on disk |
| |
|
| $execdir=$perlvar{'lonDaemons'}; |
my $execdir=$perlvar{'lonDaemons'}; |
| open (PIDSAVE,">$execdir/logs/lond.pid"); |
open (PIDSAVE,">$execdir/logs/lond.pid"); |
| print PIDSAVE "$$\n"; |
print PIDSAVE "$$\n"; |
| close(PIDSAVE); |
close(PIDSAVE); |
| &logthis("<font color=red>CRITICAL: ---------- Starting ----------</font>"); |
&logthis("<font color=red>CRITICAL: ---------- Starting ----------</font>"); |
| |
&status('Starting'); |
| |
|
| |
|
| # ------------------------------------------------------- Now we are on our own |
|
| |
|
| # Fork off our children. |
|
| for (1 .. $PREFORK) { |
|
| make_new_child(); |
|
| } |
|
| |
|
| # ----------------------------------------------------- Install signal handlers |
# ----------------------------------------------------- Install signal handlers |
| |
|
| |
|
| $SIG{CHLD} = \&REAPER; |
$SIG{CHLD} = \&REAPER; |
| $SIG{INT} = $SIG{TERM} = \&HUNTSMAN; |
$SIG{INT} = $SIG{TERM} = \&HUNTSMAN; |
| $SIG{HUP} = \&HUPSMAN; |
$SIG{HUP} = \&HUPSMAN; |
| |
$SIG{USR1} = \&checkchildren; |
| |
$SIG{USR2} = \&UpdateHosts; |
| |
|
| |
# Read the host hashes: |
| |
|
| |
ReadHostTable; |
| |
|
| |
|
| |
# -------------------------------------------------------------- |
| |
# Accept connections. When a connection comes in, it is validated |
| |
# and if good, a child process is created to process transactions |
| |
# along the connection. |
| |
|
| # And maintain the population. |
|
| while (1) { |
while (1) { |
| sleep; # wait for a signal (i.e., child's death) |
&status('Starting accept'); |
| for ($i = $children; $i < $PREFORK; $i++) { |
$client = $server->accept() or next; |
| make_new_child(); # top up the child pool |
&status('Accepted '.$client.' off to spawn'); |
| } |
make_new_child($client); |
| |
&status('Finished spawning'); |
| } |
} |
| |
|
| sub make_new_child { |
sub make_new_child { |
| my $pid; |
my $pid; |
| my $cipher; |
|
| my $sigset; |
my $sigset; |
| &logthis("Attempting to start child"); |
|
| |
$client = shift; |
| |
&status('Starting new child '.$client); |
| |
&logthis('<font color="green"> Attempting to start child ('.$client. |
| |
")</font>"); |
| # block signal for fork |
# block signal for fork |
| $sigset = POSIX::SigSet->new(SIGINT); |
$sigset = POSIX::SigSet->new(SIGINT); |
| sigprocmask(SIG_BLOCK, $sigset) |
sigprocmask(SIG_BLOCK, $sigset) |
| or catchdie "Can't block SIGINT for fork: $!\n"; |
or die "Can't block SIGINT for fork: $!\n"; |
| |
|
| catchdie "fork: $!" unless defined ($pid = fork); |
die "fork: $!" unless defined ($pid = fork); |
| |
|
| |
$client->sockopt(SO_KEEPALIVE, 1); # Enable monitoring of |
| |
# connection liveness. |
| |
|
| |
# |
| |
# Figure out who we're talking to so we can record the peer in |
| |
# the pid hash. |
| |
# |
| |
my $caller = getpeername($client); |
| |
my ($port,$iaddr)=unpack_sockaddr_in($caller); |
| |
$clientip=inet_ntoa($iaddr); |
| |
|
| if ($pid) { |
if ($pid) { |
| # Parent records the child's birth and returns. |
# Parent records the child's birth and returns. |
| sigprocmask(SIG_UNBLOCK, $sigset) |
sigprocmask(SIG_UNBLOCK, $sigset) |
| or catchdie "Can't unblock SIGINT for fork: $!\n"; |
or die "Can't unblock SIGINT for fork: $!\n"; |
| $children{$pid} = 1; |
$children{$pid} = $clientip; |
| $children++; |
$children++; |
| |
&status('Started child '.$pid); |
| return; |
return; |
| } else { |
} else { |
| # Child can *not* return from this subroutine. |
# Child can *not* return from this subroutine. |
| $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before |
$SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before |
| |
$SIG{CHLD} = 'DEFAULT'; #make this default so that pwauth returns |
| |
#don't get intercepted |
| |
$SIG{USR1}= \&logstatus; |
| |
$SIG{ALRM}= \&timeout; |
| |
$lastlog='Forked '; |
| |
$status='Forked'; |
| |
|
| # unblock signals |
# unblock signals |
| sigprocmask(SIG_UNBLOCK, $sigset) |
sigprocmask(SIG_UNBLOCK, $sigset) |
| or catchdie "Can't unblock SIGINT for fork: $!\n"; |
or die "Can't unblock SIGINT for fork: $!\n"; |
| |
|
| $tmpsnum=0; |
|
| |
|
| # handle connections until we've reached $MAX_CLIENTS_PER_CHILD |
|
| for ($i=0; $i < $MAX_CLIENTS_PER_CHILD; $i++) { |
|
| $client = $server->accept() or last; |
|
| |
|
| |
|
| |
&Authen::Krb5::init_context(); |
| |
&Authen::Krb5::init_ets(); |
| |
|
| |
&status('Accepted connection'); |
| # ============================================================================= |
# ============================================================================= |
| # do something with the connection |
# do something with the connection |
| # ----------------------------------------------------------------------------- |
# ----------------------------------------------------------------------------- |
| # see if we know client and check for spoof IP by challenge |
# see if we know client and check for spoof IP by challenge |
| my $caller=getpeername($client); |
|
| my ($port,$iaddr)=unpack_sockaddr_in($caller); |
ReadManagerTable; # May also be a manager!! |
| my $clientip=inet_ntoa($iaddr); |
|
| my $clientrec=($hostid{$clientip} ne undef); |
my $clientrec=($hostid{$clientip} ne undef); |
| &logthis( |
my $ismanager=($managers{$clientip} ne undef); |
| "<font color=yellow>INFO: Connect from $clientip ($hostid{$clientip})</font>"); |
$clientname = "[unknonwn]"; |
| my $clientok; |
if($clientrec) { # Establish client type. |
| if ($clientrec) { |
$ConnectionType = "client"; |
| my $remotereq=<$client>; |
$clientname = $hostid{$clientip}; |
| $remotereq=~s/\W//g; |
if($ismanager) { |
| if ($remotereq eq 'init') { |
$ConnectionType = "both"; |
| my $challenge="$$".time; |
} |
| print $client "$challenge\n"; |
} else { |
| $remotereq=<$client>; |
$ConnectionType = "manager"; |
| $remotereq=~s/\W//g; |
$clientname = $managers{$clientip}; |
| if ($challenge eq $remotereq) { |
} |
| $clientok=1; |
my $clientok; |
| print $client "ok\n"; |
if ($clientrec || $ismanager) { |
| } else { |
&status("Waiting for init from $clientip $clientname"); |
| &logthis( |
&logthis('<font color="yellow">INFO: Connection, '. |
| "<font color=blue>WARNING: $clientip did not reply challenge</font>"); |
$clientip. |
| print $client "bye\n"; |
" ($clientname) connection type = $ConnectionType </font>" ); |
| } |
&status("Connecting $clientip ($clientname))"); |
| } else { |
my $remotereq=<$client>; |
| &logthis( |
$remotereq=~s/[^\w:]//g; |
| "<font color=blue>WARNING: " |
if ($remotereq =~ /^init/) { |
| ."$clientip failed to initialize: >$remotereq< </font>"); |
&sethost("sethost:$perlvar{'lonHostID'}"); |
| print $client "bye\n"; |
my $challenge="$$".time; |
| } |
print $client "$challenge\n"; |
| |
&status("Waiting for challenge reply from $clientip ($clientname)"); |
| |
$remotereq=<$client>; |
| |
$remotereq=~s/\W//g; |
| |
if ($challenge eq $remotereq) { |
| |
$clientok=1; |
| |
print $client "ok\n"; |
| |
} else { |
| |
&logthis("<font color=blue>WARNING: $clientip did not reply challenge</font>"); |
| |
&status('No challenge reply '.$clientip); |
| |
} |
| } else { |
} else { |
| &logthis( |
&logthis("<font color=blue>WARNING: " |
| "<font color=blue>WARNING: Unknown client $clientip</font>"); |
."$clientip failed to initialize: >$remotereq< </font>"); |
| print $client "bye\n"; |
&status('No init '.$clientip); |
| } |
} |
| if ($clientok) { |
} else { |
| |
&logthis("<font color=blue>WARNING: Unknown client $clientip</font>"); |
| |
&status('Hung up on '.$clientip); |
| |
} |
| |
if ($clientok) { |
| # ---------------- New known client connecting, could mean machine online again |
# ---------------- New known client connecting, could mean machine online again |
| &reconlonc("$perlvar{'lonSockDir'}/$hostid{$clientip}"); |
|
| &logthis( |
foreach my $id (keys(%hostip)) { |
| "<font color=green>Established connection: $hostid{$clientip}</font>"); |
if ($hostip{$id} ne $clientip || |
| # ------------------------------------------------------------ Process requests |
$hostip{$currenthostid} eq $clientip) { |
| while (my $userinput=<$client>) { |
# no need to try to do recon's to myself |
| chomp($userinput); |
next; |
| my $wasenc=0; |
|
| # ------------------------------------------------------------ See if encrypted |
|
| if ($userinput =~ /^enc/) { |
|
| if ($cipher) { |
|
| my ($cmd,$cmdlength,$encinput)=split(/:/,$userinput); |
|
| $userinput=''; |
|
| for (my $encidx=0;$encidx<length($encinput);$encidx+=16) { |
|
| $userinput.= |
|
| $cipher->decrypt( |
|
| pack("H16",substr($encinput,$encidx,16)) |
|
| ); |
|
| } |
|
| $userinput=substr($userinput,0,$cmdlength); |
|
| $wasenc=1; |
|
| } |
|
| } |
} |
| # ------------------------------------------------------------- Normal commands |
&reconlonc("$perlvar{'lonSockDir'}/$id"); |
| # ------------------------------------------------------------------------ ping |
} |
| if ($userinput =~ /^ping/) { |
&logthis("<font color=green>Established connection: $clientname</font>"); |
| print $client "$perlvar{'lonHostID'}\n"; |
&status('Will listen to '.$clientname); |
| # ------------------------------------------------------------------------ pong |
|
| } elsif ($userinput =~ /^pong/) { |
ResetStatistics(); |
| $reply=reply("ping",$hostid{$clientip}); |
|
| print $client "$perlvar{'lonHostID'}:$reply\n"; |
# ------------------------------------------------------------ Process requests |
| # ------------------------------------------------------------------------ ekey |
my $KeepGoing = 1; |
| } elsif ($userinput =~ /^ekey/) { |
while ((my $userinput=GetRequest) && $KeepGoing) { |
| my $buildkey=time.$$.int(rand 100000); |
$KeepGoing = ProcessRequest($userinput); |
| $buildkey=~tr/1-6/A-F/; |
# -------------------------------------------------------------------- complete |
| $buildkey=int(rand 100000).$buildkey.int(rand 100000); |
|
| my $key=$perlvar{'lonHostID'}.$hostid{$clientip}; |
&status('Listening to '.$clientname); |
| $key=~tr/a-z/A-Z/; |
} |
| $key=~tr/G-P/0-9/; |
# --------------------------------------------- client unknown or fishy, refuse |
| $key=~tr/Q-Z/0-9/; |
} else { |
| $key=$key.$buildkey.$key.$buildkey.$key.$buildkey; |
print $client "refused\n"; |
| $key=substr($key,0,32); |
$client->close(); |
| my $cipherkey=pack("H32",$key); |
&logthis("<font color=blue>WARNING: " |
| $cipher=new IDEA $cipherkey; |
."Rejected client $clientip, closing connection</font>"); |
| print $client "$buildkey\n"; |
} |
| # ------------------------------------------------------------------------ load |
} |
| } elsif ($userinput =~ /^load/) { |
|
| my $loadavg; |
|
| { |
|
| my $loadfile=IO::File->new('/proc/loadavg'); |
|
| $loadavg=<$loadfile>; |
|
| } |
|
| $loadavg =~ s/\s.*//g; |
|
| my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'}; |
|
| print $client "$loadpercent\n"; |
|
| # ------------------------------------------------------------------------ auth |
|
| } elsif ($userinput =~ /^auth/) { |
|
| if ($wasenc==1) { |
|
| my ($cmd,$udom,$uname,$upass)=split(/:/,$userinput); |
|
| chomp($upass); |
|
| $upass=unescape($upass); |
|
| my $proname=propath($udom,$uname); |
|
| my $passfilename="$proname/passwd"; |
|
| if (-e $passfilename) { |
|
| my $pf = IO::File->new($passfilename); |
|
| my $realpasswd=<$pf>; |
|
| chomp($realpasswd); |
|
| my ($howpwd,$contentpwd)=split(/:/,$realpasswd); |
|
| my $pwdcorrect=0; |
|
| if ($howpwd eq 'internal') { |
|
| $pwdcorrect= |
|
| (crypt($upass,$contentpwd) eq $contentpwd); |
|
| } elsif ($howpwd eq 'unix') { |
|
| $contentpwd=(getpwnam($uname))[1]; |
|
| $pwdcorrect= |
|
| (crypt($upass,$contentpwd) eq $contentpwd); |
|
| } elsif ($howpwd eq 'krb4') { |
|
| $pwdcorrect=( |
|
| Authen::Krb4::get_pw_in_tkt($uname,"", |
|
| $contentpwd,'krbtgt',$contentpwd,1, |
|
| $upass) == 0); |
|
| } |
|
| if ($pwdcorrect) { |
|
| print $client "authorized\n"; |
|
| } else { |
|
| print $client "non_authorized\n"; |
|
| } |
|
| } else { |
|
| print $client "unknown_user\n"; |
|
| } |
|
| } else { |
|
| print $client "refused\n"; |
|
| } |
|
| # ---------------------------------------------------------------------- passwd |
|
| } elsif ($userinput =~ /^passwd/) { |
|
| if ($wasenc==1) { |
|
| my |
|
| ($cmd,$udom,$uname,$upass,$npass)=split(/:/,$userinput); |
|
| chomp($npass); |
|
| my $proname=propath($udom,$uname); |
|
| my $passfilename="$proname/passwd"; |
|
| if (-e $passfilename) { |
|
| my $realpasswd; |
|
| { my $pf = IO::File->new($passfilename); |
|
| $realpasswd=<$pf>; } |
|
| chomp($realpasswd); |
|
| my ($howpwd,$contentpwd)=split(/:/,$realpasswd); |
|
| if ($howpwd eq 'internal') { |
|
| if (crypt($upass,$contentpwd) eq $contentpwd) { |
|
| my $salt=time; |
|
| $salt=substr($salt,6,2); |
|
| my $ncpass=crypt($npass,$salt); |
|
| { my $pf = IO::File->new(">$passfilename"); |
|
| print $pf "internal:$ncpass\n";; } |
|
| print $client "ok\n"; |
|
| } else { |
|
| print $client "non_authorized\n"; |
|
| } |
|
| } else { |
|
| print $client "auth_mode_error\n"; |
|
| } |
|
| } else { |
|
| print $client "unknown_user\n"; |
|
| } |
|
| } else { |
|
| print $client "refused\n"; |
|
| } |
|
| # ------------------------------------------------------------------------ home |
|
| } elsif ($userinput =~ /^home/) { |
|
| my ($cmd,$udom,$uname)=split(/:/,$userinput); |
|
| chomp($uname); |
|
| my $proname=propath($udom,$uname); |
|
| if (-e $proname) { |
|
| print $client "found\n"; |
|
| } else { |
|
| print $client "not_found\n"; |
|
| } |
|
| # ---------------------------------------------------------------------- update |
|
| } elsif ($userinput =~ /^update/) { |
|
| my ($cmd,$fname)=split(/:/,$userinput); |
|
| my $ownership=ishome($fname); |
|
| if ($ownership eq 'not_owner') { |
|
| if (-e $fname) { |
|
| my ($dev,$ino,$mode,$nlink, |
|
| $uid,$gid,$rdev,$size, |
|
| $atime,$mtime,$ctime, |
|
| $blksize,$blocks)=stat($fname); |
|
| $now=time; |
|
| $since=$now-$atime; |
|
| if ($since>$perlvar{'lonExpire'}) { |
|
| $reply= |
|
| reply("unsub:$fname","$hostid{$clientip}"); |
|
| unlink("$fname"); |
|
| } else { |
|
| my $transname="$fname.in.transfer"; |
|
| my $remoteurl= |
|
| reply("sub:$fname","$hostid{$clientip}"); |
|
| my $response; |
|
| { |
|
| my $ua=new LWP::UserAgent; |
|
| my $request=new HTTP::Request('GET',"$remoteurl"); |
|
| $response=$ua->request($request,$transname); |
|
| } |
|
| if ($response->is_error()) { |
|
| unlink($transname); |
|
| my $message=$response->status_line; |
|
| &logthis( |
|
| "LWP GET: $message for $fname ($remoteurl)"); |
|
| } else { |
|
| if ($remoteurl!~/\.meta$/) { |
|
| my $mrequest= |
|
| new HTTP::Request('GET',$remoteurl.'.meta'); |
|
| my $mresponse= |
|
| $ua->request($mrequest,$fname.'.meta'); |
|
| if ($mresponse->is_error()) { |
|
| unlink($fname.'.meta'); |
|
| } |
|
| } |
|
| rename($transname,$fname); |
|
| } |
|
| } |
|
| print $client "ok\n"; |
|
| } else { |
|
| print $client "not_found\n"; |
|
| } |
|
| } else { |
|
| print $client "rejected\n"; |
|
| } |
|
| # ----------------------------------------------------------------- unsubscribe |
|
| } elsif ($userinput =~ /^unsub/) { |
|
| my ($cmd,$fname)=split(/:/,$userinput); |
|
| if (-e $fname) { |
|
| if (unlink("$fname.$hostid{$clientip}")) { |
|
| print $client "ok\n"; |
|
| } else { |
|
| print $client "not_subscribed\n"; |
|
| } |
|
| } else { |
|
| print $client "not_found\n"; |
|
| } |
|
| # ------------------------------------------------------------------- subscribe |
|
| } elsif ($userinput =~ /^sub/) { |
|
| my ($cmd,$fname)=split(/:/,$userinput); |
|
| my $ownership=ishome($fname); |
|
| if ($ownership eq 'owner') { |
|
| if (-e $fname) { |
|
| if (-d $fname) { |
|
| print $client "directory\n"; |
|
| } else { |
|
| $now=time; |
|
| { |
|
| my $sh; |
|
| if ($sh= |
|
| IO::File->new(">$fname.$hostid{$clientip}")) { |
|
| print $sh "$clientip:$now\n"; |
|
| } |
|
| } |
|
| $fname=~s/\/home\/httpd\/html\/res/raw/; |
|
| $fname="http://$thisserver/".$fname; |
|
| print $client "$fname\n"; |
|
| } |
|
| } else { |
|
| print $client "not_found\n"; |
|
| } |
|
| } else { |
|
| print $client "rejected\n"; |
|
| } |
|
| # ------------------------------------------------------------------------- log |
|
| } elsif ($userinput =~ /^log/) { |
|
| my ($cmd,$udom,$uname,$what)=split(/:/,$userinput); |
|
| chomp($what); |
|
| my $proname=propath($udom,$uname); |
|
| my $now=time; |
|
| { |
|
| my $hfh; |
|
| if ($hfh=IO::File->new(">>$proname/activity.log")) { |
|
| print $hfh "$now:$hostid{$clientip}:$what\n"; |
|
| print $client "ok\n"; |
|
| } else { |
|
| print $client "error:$!\n"; |
|
| } |
|
| } |
|
| # ------------------------------------------------------------------------- put |
|
| } elsif ($userinput =~ /^put/) { |
|
| my ($cmd,$udom,$uname,$namespace,$what) |
|
| =split(/:/,$userinput); |
|
| $namespace=~s/\//\_/g; |
|
| $namespace=~s/\W//g; |
|
| if ($namespace ne 'roles') { |
|
| chomp($what); |
|
| my $proname=propath($udom,$uname); |
|
| my $now=time; |
|
| { |
|
| my $hfh; |
|
| if ( |
|
| $hfh=IO::File->new(">>$proname/$namespace.hist") |
|
| ) { print $hfh "P:$now:$what\n"; } |
|
| } |
|
| my @pairs=split(/\&/,$what); |
|
| if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) { |
|
| foreach $pair (@pairs) { |
|
| ($key,$value)=split(/=/,$pair); |
|
| $hash{$key}=$value; |
|
| } |
|
| if (untie(%hash)) { |
|
| print $client "ok\n"; |
|
| } else { |
|
| print $client "error:$!\n"; |
|
| } |
|
| } else { |
|
| print $client "error:$!\n"; |
|
| } |
|
| } else { |
|
| print $client "refused\n"; |
|
| } |
|
| # -------------------------------------------------------------------- rolesput |
|
| } elsif ($userinput =~ /^rolesput/) { |
|
| if ($wasenc==1) { |
|
| my ($cmd,$exedom,$exeuser,$udom,$uname,$what) |
|
| =split(/:/,$userinput); |
|
| my $namespace='roles'; |
|
| chomp($what); |
|
| my $proname=propath($udom,$uname); |
|
| my $now=time; |
|
| { |
|
| my $hfh; |
|
| if ( |
|
| $hfh=IO::File->new(">>$proname/$namespace.hist") |
|
| ) { |
|
| print $hfh "P:$now:$exedom:$exeuser:$what\n"; |
|
| } |
|
| } |
|
| my @pairs=split(/\&/,$what); |
|
| if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) { |
|
| foreach $pair (@pairs) { |
|
| ($key,$value)=split(/=/,$pair); |
|
| $hash{$key}=$value; |
|
| } |
|
| if (untie(%hash)) { |
|
| print $client "ok\n"; |
|
| } else { |
|
| print $client "error:$!\n"; |
|
| } |
|
| } else { |
|
| print $client "error:$!\n"; |
|
| } |
|
| } else { |
|
| print $client "refused\n"; |
|
| } |
|
| # ------------------------------------------------------------------------- get |
|
| } elsif ($userinput =~ /^get/) { |
|
| my ($cmd,$udom,$uname,$namespace,$what) |
|
| =split(/:/,$userinput); |
|
| $namespace=~s/\//\_/g; |
|
| $namespace=~s/\W//g; |
|
| chomp($what); |
|
| my @queries=split(/\&/,$what); |
|
| my $proname=propath($udom,$uname); |
|
| my $qresult=''; |
|
| if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) { |
|
| for ($i=0;$i<=$#queries;$i++) { |
|
| $qresult.="$hash{$queries[$i]}&"; |
|
| } |
|
| if (untie(%hash)) { |
|
| $qresult=~s/\&$//; |
|
| print $client "$qresult\n"; |
|
| } else { |
|
| print $client "error:$!\n"; |
|
| } |
|
| } else { |
|
| print $client "error:$!\n"; |
|
| } |
|
| # ------------------------------------------------------------------------ eget |
|
| } elsif ($userinput =~ /^eget/) { |
|
| my ($cmd,$udom,$uname,$namespace,$what) |
|
| =split(/:/,$userinput); |
|
| $namespace=~s/\//\_/g; |
|
| $namespace=~s/\W//g; |
|
| chomp($what); |
|
| my @queries=split(/\&/,$what); |
|
| my $proname=propath($udom,$uname); |
|
| my $qresult=''; |
|
| if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) { |
|
| for ($i=0;$i<=$#queries;$i++) { |
|
| $qresult.="$hash{$queries[$i]}&"; |
|
| } |
|
| if (untie(%hash)) { |
|
| $qresult=~s/\&$//; |
|
| if ($cipher) { |
|
| my $cmdlength=length($qresult); |
|
| $qresult.=" "; |
|
| my $encqresult=''; |
|
| for |
|
| (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) { |
|
| $encqresult.= |
|
| unpack("H16", |
|
| $cipher->encrypt(substr($qresult,$encidx,8))); |
|
| } |
|
| print $client "enc:$cmdlength:$encqresult\n"; |
|
| } else { |
|
| print $client "error:no_key\n"; |
|
| } |
|
| } else { |
|
| print $client "error:$!\n"; |
|
| } |
|
| } else { |
|
| print $client "error:$!\n"; |
|
| } |
|
| # ------------------------------------------------------------------------- del |
|
| } elsif ($userinput =~ /^del/) { |
|
| my ($cmd,$udom,$uname,$namespace,$what) |
|
| =split(/:/,$userinput); |
|
| $namespace=~s/\//\_/g; |
|
| $namespace=~s/\W//g; |
|
| chomp($what); |
|
| my $proname=propath($udom,$uname); |
|
| my $now=time; |
|
| { |
|
| my $hfh; |
|
| if ( |
|
| $hfh=IO::File->new(">>$proname/$namespace.hist") |
|
| ) { print $hfh "D:$now:$what\n"; } |
|
| } |
|
| my @keys=split(/\&/,$what); |
|
| if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) { |
|
| foreach $key (@keys) { |
|
| delete($hash{$key}); |
|
| } |
|
| if (untie(%hash)) { |
|
| print $client "ok\n"; |
|
| } else { |
|
| print $client "error:$!\n"; |
|
| } |
|
| } else { |
|
| print $client "error:$!\n"; |
|
| } |
|
| # ------------------------------------------------------------------------ keys |
|
| } elsif ($userinput =~ /^keys/) { |
|
| my ($cmd,$udom,$uname,$namespace) |
|
| =split(/:/,$userinput); |
|
| $namespace=~s/\//\_/g; |
|
| $namespace=~s/\W//g; |
|
| my $proname=propath($udom,$uname); |
|
| my $qresult=''; |
|
| if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) { |
|
| foreach $key (keys %hash) { |
|
| $qresult.="$key&"; |
|
| } |
|
| if (untie(%hash)) { |
|
| $qresult=~s/\&$//; |
|
| print $client "$qresult\n"; |
|
| } else { |
|
| print $client "error:$!\n"; |
|
| } |
|
| } else { |
|
| print $client "error:$!\n"; |
|
| } |
|
| # ------------------------------------------------------------------------ dump |
|
| } elsif ($userinput =~ /^dump/) { |
|
| my ($cmd,$udom,$uname,$namespace) |
|
| =split(/:/,$userinput); |
|
| $namespace=~s/\//\_/g; |
|
| $namespace=~s/\W//g; |
|
| my $proname=propath($udom,$uname); |
|
| my $qresult=''; |
|
| if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) { |
|
| foreach $key (keys %hash) { |
|
| $qresult.="$key=$hash{$key}&"; |
|
| } |
|
| if (untie(%hash)) { |
|
| $qresult=~s/\&$//; |
|
| print $client "$qresult\n"; |
|
| } else { |
|
| print $client "error:$!\n"; |
|
| } |
|
| } else { |
|
| print $client "error:$!\n"; |
|
| } |
|
| # ----------------------------------------------------------------------- store |
|
| } elsif ($userinput =~ /^store/) { |
|
| my ($cmd,$udom,$uname,$namespace,$rid,$what) |
|
| =split(/:/,$userinput); |
|
| $namespace=~s/\//\_/g; |
|
| $namespace=~s/\W//g; |
|
| if ($namespace ne 'roles') { |
|
| chomp($what); |
|
| my $proname=propath($udom,$uname); |
|
| my $now=time; |
|
| { |
|
| my $hfh; |
|
| if ( |
|
| $hfh=IO::File->new(">>$proname/$namespace.hist") |
|
| ) { print $hfh "P:$now:$rid:$what\n"; } |
|
| } |
|
| my @pairs=split(/\&/,$what); |
|
| |
|
| if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT,0640)) { |
|
| my @previouskeys=split(/&/,$hash{"keys:$rid"}); |
|
| my $key; |
|
| $hash{"version:$rid"}++; |
|
| my $version=$hash{"version:$rid"}; |
|
| my $allkeys=''; |
|
| foreach $pair (@pairs) { |
|
| ($key,$value)=split(/=/,$pair); |
|
| $allkeys.=$key.':'; |
|
| $hash{"$version:$rid:$key"}=$value; |
|
| } |
|
| $allkeys=~s/:$//; |
|
| $hash{"$version:keys:$rid"}=$allkeys; |
|
| if (untie(%hash)) { |
|
| print $client "ok\n"; |
|
| } else { |
|
| print $client "error:$!\n"; |
|
| } |
|
| } else { |
|
| print $client "error:$!\n"; |
|
| } |
|
| } else { |
|
| print $client "refused\n"; |
|
| } |
|
| # --------------------------------------------------------------------- restore |
|
| } elsif ($userinput =~ /^restore/) { |
|
| my ($cmd,$udom,$uname,$namespace,$rid) |
|
| =split(/:/,$userinput); |
|
| $namespace=~s/\//\_/g; |
|
| $namespace=~s/\W//g; |
|
| chomp($rid); |
|
| my $proname=propath($udom,$uname); |
|
| my $qresult=''; |
|
| if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER,0640)) { |
|
| my $version=$hash{"version:$rid"}; |
|
| $qresult.="version=$version&"; |
|
| my $scope; |
|
| for ($scope=1;$scope<=$version;$scope++) { |
|
| my $vkeys=$hash{"$scope:keys:$rid"}; |
|
| my @keys=split(/:/,$vkeys); |
|
| my $key; |
|
| $qresult.="$scope:keys=$vkeys&"; |
|
| foreach $key (@keys) { |
|
| $qresult.="$scope:$key=".$hash{"$scope:$rid:$key"}."&"; |
|
| } |
|
| } |
|
| if (untie(%hash)) { |
|
| $qresult=~s/\&$//; |
|
| print $client "$qresult\n"; |
|
| } else { |
|
| print $client "error:$!\n"; |
|
| } |
|
| } else { |
|
| print $client "error:$!\n"; |
|
| } |
|
| # ------------------------------------------------------------------- querysend |
|
| } elsif ($userinput =~ /^querysend/) { |
|
| my ($cmd,$query)=split(/:/,$userinput); |
|
| $query=~s/\n*$//g; |
|
| print $client sqlreply("$hostid{$clientip}\&$query")."\n"; |
|
| # ------------------------------------------------------------------ queryreply |
|
| } elsif ($userinput =~ /^queryreply/) { |
|
| my ($cmd,$id,$reply)=split(/:/,$userinput); |
|
| my $store; |
|
| my $execdir=$perlvar{'lonDaemons'}; |
|
| if ($store=IO::File->new(">$execdir/tmp/$id")) { |
|
| print $store $reply; |
|
| close $store; |
|
| print $client "ok\n"; |
|
| } |
|
| else { |
|
| print $client "error:$!\n"; |
|
| } |
|
| # ----------------------------------------------------------------------- idput |
|
| } elsif ($userinput =~ /^idput/) { |
|
| my ($cmd,$udom,$what)=split(/:/,$userinput); |
|
| chomp($what); |
|
| $udom=~s/\W//g; |
|
| my $proname="$perlvar{'lonUsersDir'}/$udom/ids"; |
|
| my $now=time; |
|
| { |
|
| my $hfh; |
|
| if ( |
|
| $hfh=IO::File->new(">>$proname.hist") |
|
| ) { print $hfh "P:$now:$what\n"; } |
|
| } |
|
| my @pairs=split(/\&/,$what); |
|
| if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT,0640)) { |
|
| foreach $pair (@pairs) { |
|
| ($key,$value)=split(/=/,$pair); |
|
| $hash{$key}=$value; |
|
| } |
|
| if (untie(%hash)) { |
|
| print $client "ok\n"; |
|
| } else { |
|
| print $client "error:$!\n"; |
|
| } |
|
| } else { |
|
| print $client "error:$!\n"; |
|
| } |
|
| # ----------------------------------------------------------------------- idget |
|
| } elsif ($userinput =~ /^idget/) { |
|
| my ($cmd,$udom,$what)=split(/:/,$userinput); |
|
| chomp($what); |
|
| $udom=~s/\W//g; |
|
| my $proname="$perlvar{'lonUsersDir'}/$udom/ids"; |
|
| my @queries=split(/\&/,$what); |
|
| my $qresult=''; |
|
| if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER,0640)) { |
|
| for ($i=0;$i<=$#queries;$i++) { |
|
| $qresult.="$hash{$queries[$i]}&"; |
|
| } |
|
| if (untie(%hash)) { |
|
| $qresult=~s/\&$//; |
|
| print $client "$qresult\n"; |
|
| } else { |
|
| print $client "error:$!\n"; |
|
| } |
|
| } else { |
|
| print $client "error:$!\n"; |
|
| } |
|
| # ---------------------------------------------------------------------- tmpput |
|
| } elsif ($userinput =~ /^tmpput/) { |
|
| my ($cmd,$what)=split(/:/,$userinput); |
|
| my $store; |
|
| $tmpsnum++; |
|
| my $id=$$.'_'.$clientip.'_'.$tmpsnum; |
|
| $id=~s/\W/\_/g; |
|
| $what=~s/\n//g; |
|
| my $execdir=$perlvar{'lonDaemons'}; |
|
| if ($store=IO::File->new(">$execdir/tmp/$id.tmp")) { |
|
| print $store $what; |
|
| close $store; |
|
| print $client "$id\n"; |
|
| } |
|
| else { |
|
| print $client "error:$!\n"; |
|
| } |
|
| |
|
| # ---------------------------------------------------------------------- tmpget |
|
| } elsif ($userinput =~ /^tmpget/) { |
|
| my ($cmd,$id)=split(/:/,$userinput); |
|
| chomp($id); |
|
| $id=~s/\W/\_/g; |
|
| my $store; |
|
| my $execdir=$perlvar{'lonDaemons'}; |
|
| if ($store=IO::File->new("$execdir/tmp/$id.tmp")) { |
|
| my $reply=<$store>; |
|
| print $client "$reply\n"; |
|
| close $store; |
|
| } |
|
| else { |
|
| print $client "error:$!\n"; |
|
| } |
|
| |
|
| # -------------------------------------------------------------------------- ls |
|
| } elsif ($userinput =~ /^ls/) { |
|
| my ($cmd,$ulsdir)=split(/:/,$userinput); |
|
| my $ulsout=''; |
|
| my $ulsfn; |
|
| if (-e $ulsdir) { |
|
| while ($ulsfn=<$ulsdir/*>) { |
|
| my @ulsstats=stat($ulsfn); |
|
| $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':'; |
|
| } |
|
| } else { |
|
| $ulsout='no_such_dir'; |
|
| } |
|
| if ($ulsout eq '') { $ulsout='empty'; } |
|
| print $client "$ulsout\n"; |
|
| # ------------------------------------------------------------- unknown command |
|
| } else { |
|
| # unknown command |
|
| print $client "unknown_cmd\n"; |
|
| } |
|
| # ------------------------------------------------------ client unknown, refuse |
|
| } |
|
| } else { |
|
| print $client "refused\n"; |
|
| &logthis("<font color=blue>WARNING: " |
|
| ."Rejected client $clientip, closing connection</font>"); |
|
| } |
|
| &logthis("<font color=red>CRITICAL: " |
|
| ."Disconnect from $clientip ($hostid{$clientip})</font>"); |
|
| # ============================================================================= |
# ============================================================================= |
| } |
|
| |
|
| # tidy up gracefully and finish |
&logthis("<font color=red>CRITICAL: " |
| |
."Disconnect from $clientip ($clientname)</font>"); |
| |
|
| |
|
| |
# this exit is VERY important, otherwise the child will become |
| |
# a producer of more and more children, forking yourself into |
| |
# process death. |
| |
exit; |
| |
|
| # this exit is VERY important, otherwise the child will become |
} |
| # a producer of more and more children, forking yourself into |
|
| # process death. |
|
| exit; |
# |
| |
# Checks to see if the input roleput request was to set |
| |
# an author role. If so, invokes the lchtmldir script to set |
| |
# up a correct public_html |
| |
# Parameters: |
| |
# request - The request sent to the rolesput subchunk. |
| |
# We're looking for /domain/_au |
| |
# domain - The domain in which the user is having roles doctored. |
| |
# user - Name of the user for which the role is being put. |
| |
# authtype - The authentication type associated with the user. |
| |
# |
| |
sub ManagePermissions { |
| |
my $request = shift; |
| |
my $domain = shift; |
| |
my $user = shift; |
| |
my $authtype= shift; |
| |
|
| |
# See if the request is of the form /$domain/_au |
| |
&logthis("ruequest is $request"); |
| |
if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput... |
| |
my $execdir = $perlvar{'lonDaemons'}; |
| |
my $userhome= "/home/$user" ; |
| |
&logthis("system $execdir/lchtmldir $userhome $user $authtype"); |
| |
system("$execdir/lchtmldir $userhome $user $authtype"); |
| |
} |
| |
} |
| |
|
| |
# |
| |
# Return the full path of a user password file, whether it exists or not. |
| |
# Parameters: |
| |
# domain - Domain in which the password file lives. |
| |
# user - name of the user. |
| |
# Returns: |
| |
# Full passwd path: |
| |
# |
| |
sub PasswordPath { |
| |
my $domain = shift; |
| |
my $user = shift; |
| |
|
| |
my $path = &propath($domain, $user); |
| |
$path .= "/passwd"; |
| |
|
| |
return $path; |
| |
} |
| |
|
| |
# Password Filename |
| |
# Returns the path to a passwd file given domain and user... only if |
| |
# it exists. |
| |
# Parameters: |
| |
# domain - Domain in which to search. |
| |
# user - username. |
| |
# Returns: |
| |
# - If the password file exists returns its path. |
| |
# - If the password file does not exist, returns undefined. |
| |
# |
| |
sub PasswordFilename { |
| |
my $domain = shift; |
| |
my $user = shift; |
| |
|
| |
Debug ("PasswordFilename called: dom = $domain user = $user"); |
| |
|
| |
my $path = PasswordPath($domain, $user); |
| |
Debug("PasswordFilename got path: $path"); |
| |
if(-e $path) { |
| |
return $path; |
| |
} else { |
| |
return undef; |
| |
} |
| |
} |
| |
|
| |
# |
| |
# Rewrite the contents of the user's passwd file. |
| |
# Parameters: |
| |
# domain - domain of the user. |
| |
# name - User's name. |
| |
# contents - New contents of the file. |
| |
# Returns: |
| |
# 0 - Failed. |
| |
# 1 - Success. |
| |
# |
| |
sub RewritePwFile { |
| |
my $domain = shift; |
| |
my $user = shift; |
| |
my $contents = shift; |
| |
|
| |
my $file = PasswordFilename($domain, $user); |
| |
if (defined $file) { |
| |
my $pf = IO::File->new(">$file"); |
| |
if($pf) { |
| |
print $pf "$contents\n"; |
| |
return 1; |
| |
} else { |
| |
return 0; |
| |
} |
| |
} else { |
| |
return 0; |
| |
} |
| |
|
| |
} |
| |
# |
| |
# GetAuthType - Determines the authorization type of a user in a domain. |
| |
|
| |
# Returns the authorization type or nouser if there is no such user. |
| |
# |
| |
sub GetAuthType { |
| |
my $domain = shift; |
| |
my $user = shift; |
| |
|
| |
Debug("GetAuthType( $domain, $user ) \n"); |
| |
my $passwdfile = PasswordFilename($domain, $user); |
| |
if( defined $passwdfile ) { |
| |
my $pf = IO::File->new($passwdfile); |
| |
my $realpassword = <$pf>; |
| |
chomp($realpassword); |
| |
Debug("Password info = $realpassword\n"); |
| |
return $realpassword; |
| |
} else { |
| |
Debug("Returning nouser"); |
| |
return "nouser"; |
| |
} |
| |
} |
| |
|
| |
# |
| |
# Validate a user given their domain, name and password. This utility |
| |
# function is used by both AuthenticateHandler and ChangePasswordHandler |
| |
# to validate the login credentials of a user. |
| |
# Parameters: |
| |
# $domain - The domain being logged into (this is required due to |
| |
# the capability for multihomed systems. |
| |
# $user - The name of the user being validated. |
| |
# $password - The user's propoposed password. |
| |
# |
| |
# Returns: |
| |
# 1 - The domain,user,pasword triplet corresponds to a valid |
| |
# user. |
| |
# 0 - The domain,user,password triplet is not a valid user. |
| |
# |
| |
sub ValidateUser { |
| |
my $domain = shift; |
| |
my $user = shift; |
| |
my $password= shift; |
| |
|
| |
# Why negative ~pi you may well ask? Well this function is about |
| |
# authentication, and therefore very important to get right. |
| |
# I've initialized the flag that determines whether or not I've |
| |
# validated correctly to a value it's not supposed to get. |
| |
# At the end of this function. I'll ensure that it's not still that |
| |
# value so we don't just wind up returning some accidental value |
| |
# as a result of executing an unforseen code path that |
| |
# did not set $validated. |
| |
|
| |
my $validated = -3.14159; |
| |
|
| |
# How we authenticate is determined by the type of authentication |
| |
# the user has been assigned. If the authentication type is |
| |
# "nouser", the user does not exist so we will return 0. |
| |
|
| |
my $contents = GetAuthType($domain, $user); |
| |
my ($howpwd, $contentpwd) = split(/:/, $contents); |
| |
|
| |
my $null = pack("C",0); # Used by kerberos auth types. |
| |
|
| |
if ($howpwd ne 'nouser') { |
| |
|
| |
if($howpwd eq "internal") { # Encrypted is in local password file. |
| |
$validated = (crypt($password, $contentpwd) eq $contentpwd); |
| |
} |
| |
elsif ($howpwd eq "unix") { # User is a normal unix user. |
| |
$contentpwd = (getpwnam($user))[1]; |
| |
if($contentpwd) { |
| |
if($contentpwd eq 'x') { # Shadow password file... |
| |
my $pwauth_path = "/usr/local/sbin/pwauth"; |
| |
open PWAUTH, "|$pwauth_path" or |
| |
die "Cannot invoke authentication"; |
| |
print PWAUTH "$user\n$password\n"; |
| |
close PWAUTH; |
| |
$validated = ! $?; |
| |
|
| |
} else { # Passwords in /etc/passwd. |
| |
$validated = (crypt($password, |
| |
$contentpwd) eq $contentpwd); |
| |
} |
| |
} else { |
| |
$validated = 0; |
| |
} |
| |
} |
| |
elsif ($howpwd eq "krb4") { # user is in kerberos 4 auth. domain. |
| |
if(! ($password =~ /$null/) ) { |
| |
my $k4error = &Authen::Krb4::get_pw_in_tkt($user, |
| |
"", |
| |
$contentpwd,, |
| |
'krbtgt', |
| |
$contentpwd, |
| |
1, |
| |
$password); |
| |
if(!$k4error) { |
| |
$validated = 1; |
| |
} |
| |
else { |
| |
$validated = 0; |
| |
&logthis('krb4: '.$user.', '.$contentpwd.', '. |
| |
&Authen::Krb4::get_err_txt($Authen::Krb4::error)); |
| |
} |
| |
} |
| |
else { |
| |
$validated = 0; # Password has a match with null. |
| |
} |
| |
} |
| |
elsif ($howpwd eq "krb5") { # User is in kerberos 5 auth. domain. |
| |
if(!($password =~ /$null/)) { # Null password not allowed. |
| |
my $krbclient = &Authen::Krb5::parse_name($user.'@' |
| |
.$contentpwd); |
| |
my $krbservice = "krbtgt/".$contentpwd."\@".$contentpwd; |
| |
my $krbserver = &Authen::Krb5::parse_name($krbservice); |
| |
my $credentials= &Authen::Krb5::cc_default(); |
| |
$credentials->initialize($krbclient); |
| |
my $krbreturn = &Authen::KRb5::get_in_tkt_with_password($krbclient, |
| |
$krbserver, |
| |
$password, |
| |
$credentials); |
| |
$validated = ($krbreturn == 1); |
| |
} |
| |
else { |
| |
$validated = 0; |
| |
} |
| |
} |
| |
elsif ($howpwd eq "localauth") { |
| |
# Authenticate via installation specific authentcation method: |
| |
$validated = &localauth::localauth($user, |
| |
$password, |
| |
$contentpwd); |
| |
} |
| |
else { # Unrecognized auth is also bad. |
| |
$validated = 0; |
| |
} |
| |
} else { |
| |
$validated = 0; |
| |
} |
| |
# |
| |
# $validated has the correct stat of the authentication: |
| |
# |
| |
|
| |
unless ($validated != -3.14159) { |
| |
die "ValidateUser - failed to set the value of validated"; |
| } |
} |
| |
return $validated; |
| } |
} |
| |
|
| |
# |
| |
# Add a line to the subscription list? |
| |
# |
| |
sub addline { |
| |
my ($fname,$hostid,$ip,$newline)=@_; |
| |
my $contents; |
| |
my $found=0; |
| |
my $expr='^'.$hostid.':'.$ip.':'; |
| |
$expr =~ s/\./\\\./g; |
| |
my $sh; |
| |
if ($sh=IO::File->new("$fname.subscription")) { |
| |
while (my $subline=<$sh>) { |
| |
if ($subline !~ /$expr/) {$contents.= $subline;} else {$found=1;} |
| |
} |
| |
$sh->close(); |
| |
} |
| |
$sh=IO::File->new(">$fname.subscription"); |
| |
if ($contents) { print $sh $contents; } |
| |
if ($newline) { print $sh $newline; } |
| |
$sh->close(); |
| |
return $found; |
| |
} |
| |
# |
| |
# Get chat messages. |
| |
# |
| |
sub getchat { |
| |
my ($cdom,$cname,$udom,$uname)=@_; |
| |
my %hash; |
| |
my $proname=&propath($cdom,$cname); |
| |
my @entries=(); |
| |
if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db", |
| |
&GDBM_READER(),0640)) { |
| |
@entries=map { $_.':'.$hash{$_} } sort keys %hash; |
| |
untie %hash; |
| |
} |
| |
my @participants=(); |
| |
my $cutoff=time-60; |
| |
if (tie(%hash,'GDBM_File',"$proname/nohist_inchatroom.db", |
| |
&GDBM_WRCREAT(),0640)) { |
| |
$hash{$uname.':'.$udom}=time; |
| |
foreach (sort keys %hash) { |
| |
if ($hash{$_}>$cutoff) { |
| |
$participants[$#participants+1]='active_participant:'.$_; |
| |
} |
| |
} |
| |
untie %hash; |
| |
} |
| |
return (@participants,@entries); |
| |
} |
| |
# |
| |
# Add a chat message |
| |
# |
| |
sub chatadd { |
| |
my ($cdom,$cname,$newchat)=@_; |
| |
my %hash; |
| |
my $proname=&propath($cdom,$cname); |
| |
my @entries=(); |
| |
my $time=time; |
| |
if (tie(%hash,'GDBM_File',"$proname/nohist_chatroom.db", |
| |
&GDBM_WRCREAT(),0640)) { |
| |
@entries=map { $_.':'.$hash{$_} } sort keys %hash; |
| |
my ($lastid)=($entries[$#entries]=~/^(\w+)\:/); |
| |
my ($thentime,$idnum)=split(/\_/,$lastid); |
| |
my $newid=$time.'_000000'; |
| |
if ($thentime==$time) { |
| |
$idnum=~s/^0+//; |
| |
$idnum++; |
| |
$idnum=substr('000000'.$idnum,-6,6); |
| |
$newid=$time.'_'.$idnum; |
| |
} |
| |
$hash{$newid}=$newchat; |
| |
my $expired=$time-3600; |
| |
foreach (keys %hash) { |
| |
my ($thistime)=($_=~/(\d+)\_/); |
| |
if ($thistime<$expired) { |
| |
delete $hash{$_}; |
| |
} |
| |
} |
| |
untie %hash; |
| |
} |
| |
{ |
| |
my $hfh; |
| |
if ($hfh=IO::File->new(">>$proname/chatroom.log")) { |
| |
print $hfh "$time:".&unescape($newchat)."\n"; |
| |
} |
| |
} |
| |
} |
| |
|
| |
sub unsub { |
| |
my ($fname,$clientip)=@_; |
| |
my $result; |
| |
if (unlink("$fname.$clientname")) { |
| |
$result="ok\n"; |
| |
} else { |
| |
$result="not_subscribed\n"; |
| |
} |
| |
if (-e "$fname.subscription") { |
| |
my $found=&addline($fname,$clientname,$clientip,''); |
| |
if ($found) { $result="ok\n"; } |
| |
} else { |
| |
if ($result != "ok\n") { $result="not_subscribed\n"; } |
| |
} |
| |
return $result; |
| |
} |
| |
|
| |
sub currentversion { |
| |
my $fname=shift; |
| |
my $version=-1; |
| |
my $ulsdir=''; |
| |
if ($fname=~/^(.+)\/[^\/]+$/) { |
| |
$ulsdir=$1; |
| |
} |
| |
my ($fnamere1,$fnamere2); |
| |
# remove version if already specified |
| |
$fname=~s/\.\d+\.(\w+(?:\.meta)*)$/\.$1/; |
| |
# get the bits that go before and after the version number |
| |
if ( $fname=~/^(.*\.)(\w+(?:\.meta)*)$/ ) { |
| |
$fnamere1=$1; |
| |
$fnamere2='.'.$2; |
| |
} |
| |
if (-e $fname) { $version=1; } |
| |
if (-e $ulsdir) { |
| |
if(-d $ulsdir) { |
| |
if (opendir(LSDIR,$ulsdir)) { |
| |
my $ulsfn; |
| |
while ($ulsfn=readdir(LSDIR)) { |
| |
# see if this is a regular file (ignore links produced earlier) |
| |
my $thisfile=$ulsdir.'/'.$ulsfn; |
| |
unless (-l $thisfile) { |
| |
if ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) { |
| |
if ($1>$version) { $version=$1; } |
| |
} |
| |
} |
| |
} |
| |
closedir(LSDIR); |
| |
$version++; |
| |
} |
| |
} |
| |
} |
| |
return $version; |
| |
} |
| |
|
| |
sub thisversion { |
| |
my $fname=shift; |
| |
my $version=-1; |
| |
if ($fname=~/\.(\d+)\.\w+(?:\.meta)*$/) { |
| |
$version=$1; |
| |
} |
| |
return $version; |
| |
} |
| |
|
| |
sub subscribe { |
| |
my ($userinput,$clientip)=@_; |
| |
my $result; |
| |
my ($cmd,$fname)=split(/:/,$userinput); |
| |
my $ownership=&ishome($fname); |
| |
if ($ownership eq 'owner') { |
| |
# explitly asking for the current version? |
| |
unless (-e $fname) { |
| |
my $currentversion=¤tversion($fname); |
| |
if (&thisversion($fname)==$currentversion) { |
| |
if ($fname=~/^(.+)\.\d+\.(\w+(?:\.meta)*)$/) { |
| |
my $root=$1; |
| |
my $extension=$2; |
| |
symlink($root.'.'.$extension, |
| |
$root.'.'.$currentversion.'.'.$extension); |
| |
unless ($extension=~/\.meta$/) { |
| |
symlink($root.'.'.$extension.'.meta', |
| |
$root.'.'.$currentversion.'.'.$extension.'.meta'); |
| |
} |
| |
} |
| |
} |
| |
} |
| |
if (-e $fname) { |
| |
if (-d $fname) { |
| |
$result="directory\n"; |
| |
} else { |
| |
if (-e "$fname.$clientname") {&unsub($fname,$clientip);} |
| |
my $now=time; |
| |
my $found=&addline($fname,$clientname,$clientip, |
| |
"$clientname:$clientip:$now\n"); |
| |
if ($found) { $result="$fname\n"; } |
| |
# if they were subscribed to only meta data, delete that |
| |
# subscription, when you subscribe to a file you also get |
| |
# the metadata |
| |
unless ($fname=~/\.meta$/) { &unsub("$fname.meta",$clientip); } |
| |
$fname=~s/\/home\/httpd\/html\/res/raw/; |
| |
$fname="http://$thisserver/".$fname; |
| |
$result="$fname\n"; |
| |
} |
| |
} else { |
| |
$result="not_found\n"; |
| |
} |
| |
} else { |
| |
$result="rejected\n"; |
| |
} |
| |
return $result; |
| |
} |
| |
|
| |
sub make_passwd_file { |
| |
my ($uname, $umode,$npass,$passfilename)=@_; |
| |
my $result="ok\n"; |
| |
if ($umode eq 'krb4' or $umode eq 'krb5') { |
| |
{ |
| |
my $pf = IO::File->new(">$passfilename"); |
| |
print $pf "$umode:$npass\n"; |
| |
} |
| |
} elsif ($umode eq 'internal') { |
| |
my $salt=time; |
| |
$salt=substr($salt,6,2); |
| |
my $ncpass=crypt($npass,$salt); |
| |
{ |
| |
&Debug("Creating internal auth"); |
| |
my $pf = IO::File->new(">$passfilename"); |
| |
print $pf "internal:$ncpass\n"; |
| |
} |
| |
} elsif ($umode eq 'localauth') { |
| |
{ |
| |
my $pf = IO::File->new(">$passfilename"); |
| |
print $pf "localauth:$npass\n"; |
| |
} |
| |
} elsif ($umode eq 'unix') { |
| |
# |
| |
# Don't allow the creation of privileged accounts!!! that would |
| |
# be real bad!!! |
| |
# |
| |
my $uid = getpwnam($uname); |
| |
if((defined $uid) && ($uid == 0)) { |
| |
&logthis(">>>Attempted add of privileged account blocked<<<"); |
| |
return "no_priv_account_error\n"; |
| |
} |
| |
|
| |
# |
| |
my $execpath="$perlvar{'lonDaemons'}/"."lcuseradd"; |
| |
|
| |
&Debug("Executing external: ".$execpath); |
| |
&Debug("user = ".$uname.", Password =". $npass); |
| |
my $se = IO::File->new("|$execpath > $perlvar{'lonDaemons'}/logs/lcuseradd.log"); |
| |
print $se "$uname\n"; |
| |
print $se "$npass\n"; |
| |
print $se "$npass\n"; |
| |
|
| |
my $useraddok = $?; |
| |
if($useraddok > 0) { |
| |
my $lcstring = lcuseraddstrerror($useraddok); |
| |
&logthis("Failed lcuseradd: $lcstring"); |
| |
return "error: lcuseradd failed: $lcstring\n"; |
| |
} |
| |
my $pf = IO::File->new(">$passfilename"); |
| |
print $pf "unix:\n"; |
| |
|
| |
} elsif ($umode eq 'none') { |
| |
{ |
| |
my $pf = IO::File->new(">$passfilename"); |
| |
print $pf "none:\n"; |
| |
} |
| |
} else { |
| |
$result="auth_mode_error\n"; |
| |
} |
| |
return $result; |
| |
} |
| |
|
| |
sub sethost { |
| |
my ($remotereq) = @_; |
| |
my (undef,$hostid)=split(/:/,$remotereq); |
| |
if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; } |
| |
if ($hostip{$perlvar{'lonHostID'}} eq $hostip{$hostid}) { |
| |
$currenthostid=$hostid; |
| |
$currentdomainid=$hostdom{$hostid}; |
| |
&logthis("Setting hostid to $hostid, and domain to $currentdomainid"); |
| |
} else { |
| |
&logthis("Requested host id $hostid not an alias of ". |
| |
$perlvar{'lonHostID'}." refusing connection"); |
| |
return 'unable_to_set'; |
| |
} |
| |
return 'ok'; |
| |
} |
| |
|
| |
sub version { |
| |
my ($userinput)=@_; |
| |
$remoteVERSION=(split(/:/,$userinput))[1]; |
| |
return "version:$VERSION"; |
| |
} |
| |
############## >>>>>>>>>>>>>>>>>>>>>>>>>> FUTUREWORK <<<<<<<<<<<<<<<<<<<<<<<<<<<< |
| |
#There is a copy of this in lonnet.pm |
| |
# Can we hoist these lil' things out into common places? |
| |
# |
| |
sub userload { |
| |
my $numusers=0; |
| |
{ |
| |
opendir(LONIDS,$perlvar{'lonIDsDir'}); |
| |
my $filename; |
| |
my $curtime=time; |
| |
while ($filename=readdir(LONIDS)) { |
| |
if ($filename eq '.' || $filename eq '..') {next;} |
| |
my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9]; |
| |
if ($curtime-$mtime < 1800) { $numusers++; } |
| |
} |
| |
closedir(LONIDS); |
| |
} |
| |
my $userloadpercent=0; |
| |
my $maxuserload=$perlvar{'lonUserLoadLim'}; |
| |
if ($maxuserload) { |
| |
$userloadpercent=100*$numusers/$maxuserload; |
| |
} |
| |
$userloadpercent=sprintf("%.2f",$userloadpercent); |
| |
return $userloadpercent; |
| |
} |
| |
|
| |
# ----------------------------------- POD (plain old documentation, CPAN style) |
| |
|
| |
=head1 NAME |
| |
|
| |
lond - "LON Daemon" Server (port "LOND" 5663) |
| |
|
| |
=head1 SYNOPSIS |
| |
|
| |
Usage: B<lond> |
| |
|
| |
Should only be run as user=www. This is a command-line script which |
| |
is invoked by B<loncron>. There is no expectation that a typical user |
| |
will manually start B<lond> from the command-line. (In other words, |
| |
DO NOT START B<lond> YOURSELF.) |
| |
|
| |
=head1 DESCRIPTION |
| |
|
| |
There are two characteristics associated with the running of B<lond>, |
| |
PROCESS MANAGEMENT (starting, stopping, handling child processes) |
| |
and SERVER-SIDE ACTIVITIES (password authentication, user creation, |
| |
subscriptions, etc). These are described in two large |
| |
sections below. |
| |
|
| |
B<PROCESS MANAGEMENT> |
| |
|
| |
Preforker - server who forks first. Runs as a daemon. HUPs. |
| |
Uses IDEA encryption |
| |
|
| |
B<lond> forks off children processes that correspond to the other servers |
| |
in the network. Management of these processes can be done at the |
| |
parent process level or the child process level. |
| |
|
| |
B<logs/lond.log> is the location of log messages. |
| |
|
| |
The process management is now explained in terms of linux shell commands, |
| |
subroutines internal to this code, and signal assignments: |
| |
|
| |
=over 4 |
| |
|
| |
=item * |
| |
|
| |
PID is stored in B<logs/lond.pid> |
| |
|
| |
This is the process id number of the parent B<lond> process. |
| |
|
| |
=item * |
| |
|
| |
SIGTERM and SIGINT |
| |
|
| |
Parent signal assignment: |
| |
$SIG{INT} = $SIG{TERM} = \&HUNTSMAN; |
| |
|
| |
Child signal assignment: |
| |
$SIG{INT} = 'DEFAULT'; (and SIGTERM is DEFAULT also) |
| |
(The child dies and a SIGALRM is sent to parent, awaking parent from slumber |
| |
to restart a new child.) |
| |
|
| |
Command-line invocations: |
| |
B<kill> B<-s> SIGTERM I<PID> |
| |
B<kill> B<-s> SIGINT I<PID> |
| |
|
| |
Subroutine B<HUNTSMAN>: |
| |
This is only invoked for the B<lond> parent I<PID>. |
| |
This kills all the children, and then the parent. |
| |
The B<lonc.pid> file is cleared. |
| |
|
| |
=item * |
| |
|
| |
SIGHUP |
| |
|
| |
Current bug: |
| |
This signal can only be processed the first time |
| |
on the parent process. Subsequent SIGHUP signals |
| |
have no effect. |
| |
|
| |
Parent signal assignment: |
| |
$SIG{HUP} = \&HUPSMAN; |
| |
|
| |
Child signal assignment: |
| |
none (nothing happens) |
| |
|
| |
Command-line invocations: |
| |
B<kill> B<-s> SIGHUP I<PID> |
| |
|
| |
Subroutine B<HUPSMAN>: |
| |
This is only invoked for the B<lond> parent I<PID>, |
| |
This kills all the children, and then the parent. |
| |
The B<lond.pid> file is cleared. |
| |
|
| |
=item * |
| |
|
| |
SIGUSR1 |
| |
|
| |
Parent signal assignment: |
| |
$SIG{USR1} = \&USRMAN; |
| |
|
| |
Child signal assignment: |
| |
$SIG{USR1}= \&logstatus; |
| |
|
| |
Command-line invocations: |
| |
B<kill> B<-s> SIGUSR1 I<PID> |
| |
|
| |
Subroutine B<USRMAN>: |
| |
When invoked for the B<lond> parent I<PID>, |
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SIGUSR1 is sent to all the children, and the status of |
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each connection is logged. |
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|
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=item * |
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|
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SIGUSR2 |
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|
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Parent Signal assignment: |
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$SIG{USR2} = \&UpdateHosts |
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|
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Child signal assignment: |
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NONE |
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|
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|
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=item * |
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|
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SIGCHLD |
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|
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Parent signal assignment: |
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$SIG{CHLD} = \&REAPER; |
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|
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Child signal assignment: |
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none |
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|
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Command-line invocations: |
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B<kill> B<-s> SIGCHLD I<PID> |
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|
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Subroutine B<REAPER>: |
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This is only invoked for the B<lond> parent I<PID>. |
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Information pertaining to the child is removed. |
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The socket port is cleaned up. |
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|
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=back |
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|
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B<SERVER-SIDE ACTIVITIES> |
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|
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Server-side information can be accepted in an encrypted or non-encrypted |
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method. |
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|
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=over 4 |
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|
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=item ping |
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|
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Query a client in the hosts.tab table; "Are you there?" |
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|
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=item pong |
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|
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Respond to a ping query. |
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|
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=item ekey |
| |
|
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Read in encrypted key, make cipher. Respond with a buildkey. |
| |
|
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=item load |
| |
|
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Respond with CPU load based on a computation upon /proc/loadavg. |
| |
|
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=item currentauth |
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|
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Reply with current authentication information (only over an |
| |
encrypted channel). |
| |
|
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=item auth |
| |
|
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Only over an encrypted channel, reply as to whether a user's |
| |
authentication information can be validated. |
| |
|
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=item passwd |
| |
|
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Allow for a password to be set. |
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|
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=item makeuser |
| |
|
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Make a user. |
| |
|
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=item passwd |
| |
|
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Allow for authentication mechanism and password to be changed. |
| |
|
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=item home |
| |
|
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Respond to a question "are you the home for a given user?" |
| |
|
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=item update |
| |
|
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Update contents of a subscribed resource. |
| |
|
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=item unsubscribe |
| |
|
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The server is unsubscribing from a resource. |
| |
|
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=item subscribe |
| |
|
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The server is subscribing to a resource. |
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|
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=item log |
| |
|
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Place in B<logs/lond.log> |
| |
|
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=item put |
| |
|
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stores hash in namespace |
| |
|
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=item rolesput |
| |
|
| |
put a role into a user's environment |
| |
|
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=item get |
| |
|
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returns hash with keys from array |
| |
reference filled in from namespace |
| |
|
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=item eget |
| |
|
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returns hash with keys from array |
| |
reference filled in from namesp (encrypts the return communication) |
| |
|
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=item rolesget |
| |
|
| |
get a role from a user's environment |
| |
|
| |
=item del |
| |
|
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deletes keys out of array from namespace |
| |
|
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=item keys |
| |
|
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returns namespace keys |
| |
|
| |
=item dump |
| |
|
| |
dumps the complete (or key matching regexp) namespace into a hash |
| |
|
| |
=item store |
| |
|
| |
stores hash permanently |
| |
for this url; hashref needs to be given and should be a \%hashname; the |
| |
remaining args aren't required and if they aren't passed or are '' they will |
| |
be derived from the ENV |
| |
|
| |
=item restore |
| |
|
| |
returns a hash for a given url |
| |
|
| |
=item querysend |
| |
|
| |
Tells client about the lonsql process that has been launched in response |
| |
to a sent query. |
| |
|
| |
=item queryreply |
| |
|
| |
Accept information from lonsql and make appropriate storage in temporary |
| |
file space. |
| |
|
| |
=item idput |
| |
|
| |
Defines usernames as corresponding to IDs. (These "IDs" are unique identifiers |
| |
for each student, defined perhaps by the institutional Registrar.) |
| |
|
| |
=item idget |
| |
|
| |
Returns usernames corresponding to IDs. (These "IDs" are unique identifiers |
| |
for each student, defined perhaps by the institutional Registrar.) |
| |
|
| |
=item tmpput |
| |
|
| |
Accept and store information in temporary space. |
| |
|
| |
=item tmpget |
| |
|
| |
Send along temporarily stored information. |
| |
|
| |
=item ls |
| |
|
| |
List part of a user's directory. |
| |
|
| |
=item pushtable |
| |
|
| |
Pushes a file in /home/httpd/lonTab directory. Currently limited to: |
| |
hosts.tab and domain.tab. The old file is copied to *.tab.backup but |
| |
must be restored manually in case of a problem with the new table file. |
| |
pushtable requires that the request be encrypted and validated via |
| |
ValidateManager. The form of the command is: |
| |
enc:pushtable tablename <tablecontents> \n |
| |
where pushtable, tablename and <tablecontents> will be encrypted, but \n is a |
| |
cleartext newline. |
| |
|
| |
=item Hanging up (exit or init) |
| |
|
| |
What to do when a client tells the server that they (the client) |
| |
are leaving the network. |
| |
|
| |
=item unknown command |
| |
|
| |
If B<lond> is sent an unknown command (not in the list above), |
| |
it replys to the client "unknown_cmd". |
| |
|
| |
|
| |
=item UNKNOWN CLIENT |
| |
|
| |
If the anti-spoofing algorithm cannot verify the client, |
| |
the client is rejected (with a "refused" message sent |
| |
to the client, and the connection is closed. |
| |
|
| |
=back |
| |
|
| |
=head1 PREREQUISITES |
| |
|
| |
IO::Socket |
| |
IO::File |
| |
Apache::File |
| |
Symbol |
| |
POSIX |
| |
Crypt::IDEA |
| |
LWP::UserAgent() |
| |
GDBM_File |
| |
Authen::Krb4 |
| |
Authen::Krb5 |
| |
|
| |
=head1 COREQUISITES |
| |
|
| |
=head1 OSNAMES |
| |
|
| |
linux |
| |
|
| |
=head1 SCRIPT CATEGORIES |
| |
|
| |
Server/Process |
| |
|
| |
=cut |
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