--- loncom/lond 2003/08/12 19:46:04 1.136
+++ loncom/lond 2004/06/17 22:37:52 1.198
@@ -2,7 +2,7 @@
# The LearningOnline Network
# lond "LON Daemon" Server (port "LOND" 5663)
#
-# $Id: lond,v 1.136 2003/08/12 19:46:04 www Exp $
+# $Id: lond,v 1.198 2004/06/17 22:37:52 foxr Exp $
#
# Copyright Michigan State University Board of Trustees
#
@@ -10,7 +10,7 @@
#
# LON-CAPA is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
+# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# LON-CAPA is distributed in the hope that it will be useful,
@@ -24,40 +24,10 @@
#
# /home/httpd/html/adm/gpl.txt
#
+
+
# http://www.lon-capa.org/
#
-# 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,
-# 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,
-# 03/07,05/31 Gerd Kortemeyer
-# 06/29,06/30,07/14,07/15,07/17,07/20,07/25,09/18 Gerd Kortemeyer
-# 12/05,12/13,12/29 Gerd Kortemeyer
-# YEAR=2001
-# 02/12 Gerd Kortemeyer
-# 03/24 Gerd Kortemeyer
-# 05/11,05/28,08/30 Gerd Kortemeyer
-# 11/26,11/27 Gerd Kortemeyer
-# 12/22 Gerd Kortemeyer
-# YEAR=2002
-# 01/20/02,02/05 Gerd Kortemeyer
-# 02/05 Guy Albertelli
-# 02/12 Gerd Kortemeyer
-# 02/19 Matthew Hall
-# 02/25 Gerd Kortemeyer
-# 01/xx/2003 Ron Fox.. Remove preforking. This makes the general daemon
-# logic simpler (and there were problems maintaining the preforked
-# population). Since the time averaged connection rate is close to zero
-# because lonc's purpose is to maintain near continuous connnections,
-# preforking is not really needed.
-# 08/xx/2003 Ron Fox: Add management requests. Management requests
-# will be validated via a call to ValidateManager. At present, this
-# is done by simple host verification. In the future we can modify
-# this function to do a certificate check.
-# Management functions supported include:
-# - pushing /home/httpd/lonTabs/hosts.tab
-# - pushing /home/httpd/lonTabs/domain.tab
-###
use strict;
use lib '/home/httpd/lib/perl/';
@@ -75,24 +45,49 @@ use Authen::Krb4;
use Authen::Krb5;
use lib '/home/httpd/lib/perl/';
use localauth;
+use localenroll;
+use File::Copy;
+use LONCAPA::ConfigFileEdit;
+use LONCAPA::lonlocal;
+use LONCAPA::lonssl;
-my $DEBUG = 0; # Non zero to enable debug log entries.
+my $DEBUG = 11; # Non zero to enable debug log entries.
my $status='';
my $lastlog='';
-my $VERSION='$Revision: 1.136 $'; #' stupid emacs
+my $VERSION='$Revision: 1.198 $'; #' stupid emacs
my $remoteVERSION;
my $currenthostid;
my $currentdomainid;
my $client;
+my $clientip; # IP address of client.
+my $clientdns; # DNS name of client.
+my $clientname; # LonCAPA name of client.
+
my $server;
-my $thisserver;
+my $thisserver; # DNS of us.
-my %hostid;
-my %hostdom;
-my %hostip;
+my $keymode;
+
+#
+# Connection type is:
+# client - All client actions are allowed
+# manager - only management functions allowed.
+# both - Both management and client actions are allowed
+#
+
+my $ConnectionType;
+
+my %hostid; # ID's for hosts in cluster by ip.
+my %hostdom; # LonCAPA domain for hosts in cluster.
+my %hostip; # IPs for hosts in cluster.
+my %hostdns; # ID's of hosts looked up by DNS name.
+
+my %managers; # Ip -> manager names
+
+my %perlvar; # Will have the apache conf defined perl vars.
#
# The array below are password error strings."
@@ -122,16 +117,789 @@ my @adderrors = ("ok",
"lcuseradd Incorrect number of stdinput lines, must be 3",
"lcuseradd Too many other simultaneous pwd changes in progress",
"lcuseradd User does not exist",
- "lcuseradd Unabel to mak ewww member of users's group",
+ "lcuseradd Unable to make www member of users's group",
"lcuseradd Unable to su to root",
"lcuseradd Unable to set password",
- "lcuseradd Usrname has invbalid charcters",
+ "lcuseradd Usrname has invalid characters",
"lcuseradd Password has an invalid character",
"lcuseradd User already exists",
"lcuseradd Could not add user.",
"lcuseradd Password mismatch");
+#------------------------------------------------------------------------
+#
+# LocalConnection
+# Completes the formation of a locally authenticated connection.
+# This function will ensure that the 'remote' client is really the
+# local host. If not, the connection is closed, and the function fails.
+# If so, initcmd is parsed for the name of a file containing the
+# IDEA session key. The fie is opened, read, deleted and the session
+# key returned to the caller.
+#
+# Parameters:
+# $Socket - Socket open on client.
+# $initcmd - The full text of the init command.
+#
+# Implicit inputs:
+# $clientdns - The DNS name of the remote client.
+# $thisserver - Our DNS name.
+#
+# Returns:
+# IDEA session key on success.
+# undef on failure.
+#
+sub LocalConnection {
+ my ($Socket, $initcmd) = @_;
+ Debug("Attempting local connection: $initcmd client: $clientdns me: $thisserver");
+ if($clientdns ne $thisserver) {
+ &logthis('<font color="red"> LocalConnection rejecting non local: '
+ ."$clientdns ne $thisserver </font>");
+ close $Socket;
+ return undef;
+ }
+ else {
+ chomp($initcmd); # Get rid of \n in filename.
+ my ($init, $type, $name) = split(/:/, $initcmd);
+ Debug(" Init command: $init $type $name ");
+
+ # Require that $init = init, and $type = local: Otherwise
+ # the caller is insane:
+
+ if(($init ne "init") && ($type ne "local")) {
+ &logthis('<font color = "red"> LocalConnection: caller is insane! '
+ ."init = $init, and type = $type </font>");
+ close($Socket);;
+ return undef;
+
+ }
+ # Now get the key filename:
+
+ my $IDEAKey = lonlocal::ReadKeyFile($name);
+ return $IDEAKey;
+ }
+}
+#------------------------------------------------------------------------------
+#
+# SSLConnection
+# Completes the formation of an ssh authenticated connection. The
+# socket is promoted to an ssl socket. If this promotion and the associated
+# certificate exchange are successful, the IDEA key is generated and sent
+# to the remote peer via the SSL tunnel. The IDEA key is also returned to
+# the caller after the SSL tunnel is torn down.
+#
+# Parameters:
+# Name Type Purpose
+# $Socket IO::Socket::INET Plaintext socket.
+#
+# Returns:
+# IDEA key on success.
+# undef on failure.
+#
+sub SSLConnection {
+ my $Socket = shift;
+
+ Debug("SSLConnection: ");
+ my $KeyFile = lonssl::KeyFile();
+ if(!$KeyFile) {
+ my $err = lonssl::LastError();
+ &logthis("<font color=\"red\"> CRITICAL"
+ ."Can't get key file $err </font>");
+ return undef;
+ }
+ my ($CACertificate,
+ $Certificate) = lonssl::CertificateFile();
+
+
+ # If any of the key, certificate or certificate authority
+ # certificate filenames are not defined, this can't work.
+
+ if((!$Certificate) || (!$CACertificate)) {
+ my $err = lonssl::LastError();
+ &logthis("<font color=\"red\"> CRITICAL"
+ ."Can't get certificates: $err </font>");
+
+ return undef;
+ }
+ Debug("Key: $KeyFile CA: $CACertificate Cert: $Certificate");
+
+ # Indicate to our peer that we can procede with
+ # a transition to ssl authentication:
+
+ print $Socket "ok:ssl\n";
+
+ Debug("Approving promotion -> ssl");
+ # And do so:
+
+ my $SSLSocket = lonssl::PromoteServerSocket($Socket,
+ $CACertificate,
+ $Certificate,
+ $KeyFile);
+ if(! ($SSLSocket) ) { # SSL socket promotion failed.
+ my $err = lonssl::LastError();
+ &logthis("<font color=\"red\"> CRITICAL "
+ ."SSL Socket promotion failed: $err </font>");
+ return undef;
+ }
+ Debug("SSL Promotion successful");
+
+ #
+ # The only thing we'll use the socket for is to send the IDEA key
+ # to the peer:
+
+ my $Key = lonlocal::CreateCipherKey();
+ print $SSLSocket "$Key\n";
+
+ lonssl::Close($SSLSocket);
+
+ Debug("Key exchange complete: $Key");
+
+ return $Key;
+}
+#
+# InsecureConnection:
+# If insecure connections are allowd,
+# exchange a challenge with the client to 'validate' the
+# client (not really, but that's the protocol):
+# We produce a challenge string that's sent to the client.
+# The client must then echo the challenge verbatim to us.
+#
+# Parameter:
+# Socket - Socket open on the client.
+# Returns:
+# 1 - success.
+# 0 - failure (e.g.mismatch or insecure not allowed).
+#
+sub InsecureConnection {
+ my $Socket = shift;
+
+ # Don't even start if insecure connections are not allowed.
+
+ if(! $perlvar{londAllowInsecure}) { # Insecure connections not allowed.
+ return 0;
+ }
+
+ # Fabricate a challenge string and send it..
+
+ my $challenge = "$$".time; # pid + time.
+ print $Socket "$challenge\n";
+ &status("Waiting for challenge reply");
+
+ my $answer = <$Socket>;
+ $answer =~s/\W//g;
+ if($challenge eq $answer) {
+ return 1;
+ }
+ else {
+ logthis("<font color='blue'>WARNING client did not respond to challenge</font>");
+ &status("No challenge reqply");
+ return 0;
+ }
+
+
+}
+
+#
+# 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;
+}
+
+#
+# Return true if client is a manager.
+#
+sub isManager {
+ return (($ConnectionType eq "manager") || ($ConnectionType eq "both"));
+}
+#
+# Return tru if client can do client functions
+#
+sub isClient {
+ return (($ConnectionType eq "client") || ($ConnectionType eq "both"));
+}
+
+
+#
+# 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, $newfile) = @_;
+
+ # 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, $Contents) = @_;
+ 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, $editor) = @_;
+
+ # 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, $editor) = @_;
+
+ 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.
#
@@ -161,7 +929,8 @@ sub catchexception {
my ($error)=@_;
$SIG{'QUIT'}='DEFAULT';
$SIG{__DIE__}='DEFAULT';
- &logthis("<font color=red>CRITICAL: "
+ &status("Catching exception");
+ &logthis("<font color='red'>CRITICAL: "
."ABNORMAL EXIT. Child $$ for server $thisserver died through "
."a crash with this error msg->[$error]</font>");
&logthis('Famous last words: '.$status.' - '.$lastlog);
@@ -171,7 +940,8 @@ sub catchexception {
}
sub timeout {
- &logthis("<font color=ref>CRITICAL: TIME OUT ".$$."</font>");
+ &status("Handling Timeout");
+ &logthis("<font color='red'>CRITICAL: TIME OUT ".$$."</font>");
&catchexception('Timeout');
}
# -------------------------------- Set signal handlers to record abnormal exits
@@ -182,7 +952,7 @@ $SIG{__DIE__}=\&catchexception;
# ---------------------------------- Read loncapa_apache.conf and loncapa.conf
&status("Read loncapa.conf and loncapa_apache.conf");
my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
-my %perlvar=%{$perlvarref};
+%perlvar=%{$perlvarref};
undef $perlvarref;
# ----------------------------- Make sure this process is running from user=www
@@ -208,17 +978,7 @@ if (-e $pidfile) {
# ------------------------------------------------------------- Read hosts file
-open (CONFIG,"$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);
# establish SERVER socket, bind and listen.
$server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
@@ -233,41 +993,154 @@ $server = IO::Socket::INET->new(LocalPor
# global variables
my %children = (); # keys are current child process IDs
-my $children = 0; # current number of children
sub REAPER { # takes care of dead children
$SIG{CHLD} = \&REAPER;
- my $pid = wait;
- if (defined($children{$pid})) {
- &logthis("Child $pid died");
- $children --;
- delete $children{$pid};
- } else {
- &logthis("Unknown Child $pid died");
+ &status("Handling child death");
+ my $pid;
+ do {
+ $pid = waitpid(-1,&WNOHANG());
+ if (defined($children{$pid})) {
+ &logthis("Child $pid died");
+ delete($children{$pid});
+ } elsif ($pid > 0) {
+ &logthis("Unknown Child $pid died");
+ }
+ } while ( $pid > 0 );
+ foreach my $child (keys(%children)) {
+ $pid = waitpid($child,&WNOHANG());
+ if ($pid > 0) {
+ &logthis("Child $child - $pid looks like we missed it's death");
+ delete($children{$pid});
+ }
}
+ &status("Finished Handling child death");
}
sub HUNTSMAN { # signal handler for SIGINT
+ &status("Killing children (INT)");
local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
kill 'INT' => keys %children;
&logthis("Free socket: ".shutdown($server,2)); # free up socket
my $execdir=$perlvar{'lonDaemons'};
unlink("$execdir/logs/lond.pid");
- &logthis("<font color=red>CRITICAL: Shutting down</font>");
+ &logthis("<font color='red'>CRITICAL: Shutting down</font>");
+ &status("Done killing children");
exit; # clean up with dignity
}
sub HUPSMAN { # signal handler for SIGHUP
local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
+ &status("Killing children for restart (HUP)");
kill 'INT' => keys %children;
&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'};
unlink("$execdir/logs/lond.pid");
+ &status("Restarting self (HUP)");
exec("$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 %hostdns.
+#
+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};
+ }
+ foreach my $key (keys %hostdns) {
+ delete $hostdns{$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";
+ my $myloncapaname = $perlvar{'lonHostID'};
+ Debug("My loncapa name is : $myloncapaname");
+ while (my $configline=<CONFIG>) {
+ if (!($configline =~ /^\s*\#/)) {
+ my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
+ chomp($ip); $ip=~s/\D+$//;
+ $hostid{$ip}=$id; # LonCAPA name of host by IP.
+ $hostdom{$id}=$domain; # LonCAPA domain name of host.
+ $hostip{$id}=$ip; # IP address of host.
+ $hostdns{$name} = $id; # LonCAPA name of host by DNS.
+
+ if ($id eq $perlvar{'lonHostID'}) {
+ Debug("Found me in the host table: $name");
+ $thisserver=$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');
@@ -282,6 +1155,7 @@ sub checkchildren {
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 {
@@ -298,7 +1172,8 @@ sub checkchildren {
}
}
$SIG{ALRM} = 'DEFAULT';
- $SIG{__DIE__} = \&cathcexception;
+ $SIG{__DIE__} = \&catchexception;
+ &status("Finished checking children");
}
# --------------------------------------------------------------------- Logging
@@ -320,20 +1195,41 @@ sub Debug {
&logthis($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.
+#
+sub Reply {
+
+ my ($fd, $reply, $request) = @_;
+
+ print $fd $reply;
+ Debug("Request was $request Reply was $reply");
+
+}
# ------------------------------------------------------------------ Log status
sub logstatus {
+ &status("Doing logging");
my $docdir=$perlvar{'lonDocRoot'};
{
my $fh=IO::File->new(">>$docdir/lon-status/londstatus.txt");
- print $fh $$."\t".$currenthostid."\t".$status."\t".$lastlog."\n";
+ print $fh $$."\t".$clientname."\t".$currenthostid."\t"
+ .$status."\t".$lastlog."\t $keymode\n";
$fh->close();
}
+ &status("Finished londstatus.txt");
{
my $fh=IO::File->new(">$docdir/lon-status/londchld/$$.txt");
- print $fh $status."\n".$lastlog."\n".time;
+ print $fh $status."\n".$lastlog."\n".time."\n$keymode";
$fh->close();
}
+ &status("Finished logging");
}
sub initnewstatus {
@@ -389,11 +1285,11 @@ sub reconlonc {
kill USR1 => $loncpid;
} else {
&logthis(
- "<font color=red>CRITICAL: "
+ "<font color='red'>CRITICAL: "
."lonc at pid $loncpid not responding, giving up</font>");
}
} else {
- &logthis('<font color=red>CRITICAL: lonc not running, giving up</font>');
+ &logthis('<font color="red">CRITICAL: lonc not running, giving up</font>');
}
}
@@ -497,7 +1393,7 @@ my $execdir=$perlvar{'lonDaemons'};
open (PIDSAVE,">$execdir/logs/lond.pid");
print PIDSAVE "$$\n";
close(PIDSAVE);
-&logthis("<font color=red>CRITICAL: ---------- Starting ----------</font>");
+&logthis("<font color='red'>CRITICAL: ---------- Starting ----------</font>");
&status('Starting');
@@ -509,8 +1405,11 @@ $SIG{CHLD} = \&REAPER;
$SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
$SIG{HUP} = \&HUPSMAN;
$SIG{USR1} = \&checkchildren;
+$SIG{USR2} = \&UpdateHosts;
+# Read the host hashes:
+ReadHostTable;
# --------------------------------------------------------------
# Accept connections. When a connection comes in, it is validated
@@ -518,8 +1417,11 @@ $SIG{USR1} = \&checkchildren;
# along the connection.
while (1) {
+ &status('Starting accept');
$client = $server->accept() or next;
+ &status('Accepted '.$client.' off to spawn');
make_new_child($client);
+ &status('Finished spawning');
}
sub make_new_child {
@@ -528,21 +1430,45 @@ sub make_new_child {
my $sigset;
$client = shift;
- &logthis("Attempting to start child");
+ &status('Starting new child '.$client);
+ &logthis('<font color="green"> Attempting to start child ('.$client.
+ ")</font>");
# block signal for fork
$sigset = POSIX::SigSet->new(SIGINT);
sigprocmask(SIG_BLOCK, $sigset)
or die "Can't block SIGINT for fork: $!\n";
- my $clientip;
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);
+ if (defined($caller) && length($caller) > 0) {
+ ($port,$iaddr)=unpack_sockaddr_in($caller);
+ } else {
+ &logthis("Unable to determine who caller was, getpeername returned nothing");
+ }
+ if (defined($iaddr)) {
+ $clientip = inet_ntoa($iaddr);
+ Debug("Connected with $clientip");
+ $clientdns = gethostbyaddr($iaddr, AF_INET);
+ Debug("Connected with $clientdns by name");
+ } else {
+ &logthis("Unable to determine clientip");
+ $clientip='Unavailable';
+ }
if ($pid) {
# Parent records the child's birth and returns.
sigprocmask(SIG_UNBLOCK, $sigset)
or die "Can't unblock SIGINT for fork: $!\n";
- $children{$pid} = 1;
- $children++;
+ $children{$pid} = $clientip;
&status('Started child '.$pid);
return;
} else {
@@ -564,1228 +1490,1737 @@ sub make_new_child {
&Authen::Krb5::init_context();
&Authen::Krb5::init_ets();
- &status('Accepted connection');
+ &status('Accepted connection');
# =============================================================================
# do something with the connection
# -----------------------------------------------------------------------------
- $client->sockopt(SO_KEEPALIVE, 1);# Enable monitoring of
- # connection liveness.
- # see if we know client and check for spoof IP by challenge
- my $caller = getpeername($client);
- my ($port,$iaddr)=unpack_sockaddr_in($caller);
- $clientip=inet_ntoa($iaddr);
- my $clientrec=($hostid{$clientip} ne undef);
- &logthis(
-"<font color=yellow>INFO: Connection, $clientip ($hostid{$clientip})</font>"
- );
- &status("Connecting $clientip ($hostid{$clientip})");
- my $clientok;
- if ($clientrec) {
- &status("Waiting for init from $clientip ($hostid{$clientip})");
- my $remotereq=<$client>;
- $remotereq=~s/[^\w:]//g;
- if ($remotereq =~ /^init/) {
- &sethost("sethost:$perlvar{'lonHostID'}");
- my $challenge="$$".time;
- print $client "$challenge\n";
- &status(
- "Waiting for challenge reply from $clientip ($hostid{$clientip})");
- $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 {
- &logthis(
- "<font color=blue>WARNING: "
- ."$clientip failed to initialize: >$remotereq< </font>");
- &status('No init '.$clientip);
- }
- } 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
+ # see if we know client and 'check' for spoof IP by ineffective challenge
+
+ ReadManagerTable; # May also be a manager!!
+
+ my $clientrec=($hostid{$clientip} ne undef);
+ my $ismanager=($managers{$clientip} ne undef);
+ $clientname = "[unknonwn]";
+ if($clientrec) { # Establish client type.
+ $ConnectionType = "client";
+ $clientname = $hostid{$clientip};
+ if($ismanager) {
+ $ConnectionType = "both";
+ }
+ } else {
+ $ConnectionType = "manager";
+ $clientname = $managers{$clientip};
+ }
+ my $clientok;
- foreach my $id (keys(%hostip)) {
- if ($hostip{$id} ne $clientip ||
- $hostip{$currenthostid} eq $clientip) {
- # no need to try to do recon's to myself
- next;
+ if ($clientrec || $ismanager) {
+ &status("Waiting for init from $clientip $clientname");
+ &logthis('<font color="yellow">INFO: Connection, '.
+ $clientip.
+ " ($clientname) connection type = $ConnectionType </font>" );
+ &status("Connecting $clientip ($clientname))");
+ my $remotereq=<$client>;
+ chomp($remotereq);
+ Debug("Got init: $remotereq");
+ my $inikeyword = split(/:/, $remotereq);
+ if ($remotereq =~ /^init/) {
+ &sethost("sethost:$perlvar{'lonHostID'}");
+ #
+ # If the remote is attempting a local init... give that a try:
+ #
+ my ($i, $inittype) = split(/:/, $remotereq);
+
+ # If the connection type is ssl, but I didn't get my
+ # certificate files yet, then I'll drop back to
+ # insecure (if allowed).
+
+ if($inittype eq "ssl") {
+ my ($ca, $cert) = lonssl::CertificateFile;
+ my $kfile = lonssl::KeyFile;
+ if((!$ca) ||
+ (!$cert) ||
+ (!$kfile)) {
+ $inittype = ""; # This forces insecure attempt.
+ &logthis("<font color=\"blue\"> Certificates not "
+ ."installed -- trying insecure auth</font>");
+ }
+ else { # SSL certificates are in place so
+ } # Leave the inittype alone.
+ }
+
+ if($inittype eq "local") {
+ my $key = LocalConnection($client, $remotereq);
+ if($key) {
+ Debug("Got local key $key");
+ $clientok = 1;
+ my $cipherkey = pack("H32", $key);
+ $cipher = new IDEA($cipherkey);
+ print $client "ok:local\n";
+ &logthis('<font color="green"'
+ . "Successful local authentication </font>");
+ $keymode = "local"
+ } else {
+ Debug("Failed to get local key");
+ $clientok = 0;
+ shutdown($client, 3);
+ close $client;
+ }
+ } elsif ($inittype eq "ssl") {
+ my $key = SSLConnection($client);
+ if ($key) {
+ $clientok = 1;
+ my $cipherkey = pack("H32", $key);
+ $cipher = new IDEA($cipherkey);
+ &logthis('<font color="green">'
+ ."Successfull ssl authentication with $clientname </font>");
+ $keymode = "ssl";
+
+ } else {
+ $clientok = 0;
+ close $client;
}
- &reconlonc("$perlvar{'lonSockDir'}/$id");
+
+ } else {
+ my $ok = InsecureConnection($client);
+ if($ok) {
+ $clientok = 1;
+ &logthis('<font color="green">'
+ ."Successful insecure authentication with $clientname </font>");
+ print $client "ok\n";
+ $keymode = "insecure";
+ } else {
+ &logthis('<font color="yellow">'
+ ."Attempted insecure connection disallowed </font>");
+ close $client;
+ $clientok = 0;
+
+ }
+ }
+ } else {
+ &logthis(
+ "<font color='blue'>WARNING: "
+ ."$clientip failed to initialize: >$remotereq< </font>");
+ &status('No init '.$clientip);
+ }
+
+ } 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
+
+ foreach my $id (keys(%hostip)) {
+ if ($hostip{$id} ne $clientip ||
+ $hostip{$currenthostid} eq $clientip) {
+ # no need to try to do recon's to myself
+ next;
}
- &logthis("<font color=green>Established connection: $hostid{$clientip}</font>");
- &status('Will listen to '.$hostid{$clientip});
+ &reconlonc("$perlvar{'lonSockDir'}/$id");
+ }
+ &logthis("<font color='green'>Established connection: $clientname</font>");
+ &status('Will listen to '.$clientname);
# ------------------------------------------------------------ Process requests
- while (my $userinput=<$client>) {
+ while (my $userinput=<$client>) {
chomp($userinput);
Debug("Request = $userinput\n");
- &status('Processing '.$hostid{$clientip}.': '.$userinput);
+ &status('Processing '.$clientname.': '.$userinput);
my $wasenc=0;
alarm(120);
# ------------------------------------------------------------ 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))
- );
+ 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;
}
- $userinput=substr($userinput,0,$cmdlength);
- $wasenc=1;
}
- }
-
+
# ------------------------------------------------------------- Normal commands
# ------------------------------------------------------------------------ ping
- if ($userinput =~ /^ping/) {
- print $client "$currenthostid\n";
+ if ($userinput =~ /^ping/) { # client only
+ if(isClient) {
+ print $client "$currenthostid\n";
+ } else {
+ Reply($client, "refused\n", $userinput);
+ }
# ------------------------------------------------------------------------ pong
- } elsif ($userinput =~ /^pong/) {
- my $reply=&reply("ping",$hostid{$clientip});
- print $client "$currenthostid:$reply\n";
+ }elsif ($userinput =~ /^pong/) { # client only
+ if(isClient) {
+ my $reply=&reply("ping",$clientname);
+ print $client "$currenthostid:$reply\n";
+ } else {
+ Reply($client, "refused\n", $userinput);
+ }
# ------------------------------------------------------------------------ ekey
- } elsif ($userinput =~ /^ekey/) {
- my $buildkey=time.$$.int(rand 100000);
- $buildkey=~tr/1-6/A-F/;
- $buildkey=int(rand 100000).$buildkey.int(rand 100000);
- my $key=$currenthostid.$hostid{$clientip};
- $key=~tr/a-z/A-Z/;
- $key=~tr/G-P/0-9/;
- $key=~tr/Q-Z/0-9/;
- $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
- $key=substr($key,0,32);
- my $cipherkey=pack("H32",$key);
- $cipher=new IDEA $cipherkey;
- print $client "$buildkey\n";
+ } elsif ($userinput =~ /^ekey/) { # ok for both clients & mgrs
+ my $buildkey=time.$$.int(rand 100000);
+ $buildkey=~tr/1-6/A-F/;
+ $buildkey=int(rand 100000).$buildkey.int(rand 100000);
+ my $key=$currenthostid.$clientname;
+ $key=~tr/a-z/A-Z/;
+ $key=~tr/G-P/0-9/;
+ $key=~tr/Q-Z/0-9/;
+ $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
+ $key=substr($key,0,32);
+ my $cipherkey=pack("H32",$key);
+ $cipher=new IDEA $cipherkey;
+ 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";
+ } elsif ($userinput =~ /^load/) { # client only
+ if (isClient) {
+ 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";
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# -------------------------------------------------------------------- userload
- } elsif ($userinput =~ /^userload/) {
- my $userloadpercent=&userload();
- print $client "$userloadpercent\n";
+ } elsif ($userinput =~ /^userload/) { # client only
+ if(isClient) {
+ my $userloadpercent=&userload();
+ print $client "$userloadpercent\n";
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
+#
+# Transactions requiring encryption:
+#
# ----------------------------------------------------------------- currentauth
- } elsif ($userinput =~ /^currentauth/) {
- if ($wasenc==1) {
- my ($cmd,$udom,$uname)=split(/:/,$userinput);
- my $result = GetAuthType($udom, $uname);
- if($result eq "nouser") {
- print $client "unknown_user\n";
- }
- else {
- print $client "$result\n"
- }
- } else {
- print $client "refused\n";
- }
+ } elsif ($userinput =~ /^currentauth/) {
+ if (($wasenc==1) && isClient) { # Encoded & client only.
+ my ($cmd,$udom,$uname)=split(/:/,$userinput);
+ my $result = GetAuthType($udom, $uname);
+ if($result eq "nouser") {
+ print $client "unknown_user\n";
+ }
+ else {
+ print $client "$result\n"
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
+#--------------------------------------------------------------------- pushfile
+ } elsif($userinput =~ /^pushfile/) { # encoded & manager.
+ if(($wasenc == 1) && isManager) {
+ my $cert = GetCertificate($userinput);
+ if(ValidManager($cert)) {
+ my $reply = PushFile($userinput);
+ print $client "$reply\n";
+ } else {
+ print $client "refused\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
+#--------------------------------------------------------------------- reinit
+ } elsif($userinput =~ /^reinit/) { # Encoded and manager
+ if (($wasenc == 1) && isManager) {
+ my $cert = GetCertificate($userinput);
+ if(ValidManager($cert)) {
+ chomp($userinput);
+ my $reply = ReinitProcess($userinput);
+ print $client "$reply\n";
+ } else {
+ print $client "refused\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+ }
+#------------------------------------------------------------------------- edit
+ } elsif ($userinput =~ /^edit/) { # encoded and manager:
+ if(($wasenc ==1) && (isManager)) {
+ my $cert = GetCertificate($userinput);
+ if(ValidManager($cert)) {
+ my($command, $filetype, $script) = split(/:/, $userinput);
+ if (($filetype eq "hosts") || ($filetype eq "domain")) {
+ if($script ne "") {
+ Reply($client, EditFile($userinput));
+ } else {
+ Reply($client,"refused\n",$userinput);
+ }
+ } else {
+ Reply($client,"refused\n",$userinput);
+ }
+ } else {
+ Reply($client,"refused\n",$userinput);
+ }
+ } else {
+ Reply($client,"refused\n",$userinput);
+ }
# ------------------------------------------------------------------------ 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') {
- &Debug("Internal auth");
- $pwdcorrect=
- (crypt($upass,$contentpwd) eq $contentpwd);
- } elsif ($howpwd eq 'unix') {
- &Debug("Unix auth");
- if((getpwnam($uname))[1] eq "") { #no such user!
- $pwdcorrect = 0;
- } else {
- $contentpwd=(getpwnam($uname))[1];
- my $pwauth_path="/usr/local/sbin/pwauth";
- unless ($contentpwd eq 'x') {
- $pwdcorrect=
- (crypt($upass,$contentpwd) eq
- $contentpwd);
- }
-
- elsif (-e $pwauth_path) {
- open PWAUTH, "|$pwauth_path" or
- die "Cannot invoke authentication";
- print PWAUTH "$uname\n$upass\n";
- close PWAUTH;
- $pwdcorrect=!$?;
- }
- }
- } elsif ($howpwd eq 'krb4') {
- my $null=pack("C",0);
- unless ($upass=~/$null/) {
- my $krb4_error = &Authen::Krb4::get_pw_in_tkt
- ($uname,"",$contentpwd,'krbtgt',
- $contentpwd,1,$upass);
- if (!$krb4_error) {
- $pwdcorrect = 1;
- } else {
- $pwdcorrect=0;
- # log error if it is not a bad password
- if ($krb4_error != 62) {
- &logthis('krb4:'.$uname.','.$contentpwd.','.
- &Authen::Krb4::get_err_txt($Authen::Krb4::error));
- }
- }
- }
- } elsif ($howpwd eq 'krb5') {
- my $null=pack("C",0);
- unless ($upass=~/$null/) {
- my $krbclient=&Authen::Krb5::parse_name($uname.'@'.$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,$upass,$credentials);
+ } elsif ($userinput =~ /^auth/) { # Encoded and client only.
+ if (($wasenc==1) && isClient) {
+ 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') {
+ &Debug("Internal auth");
+ $pwdcorrect=
+ (crypt($upass,$contentpwd) eq $contentpwd);
+ } elsif ($howpwd eq 'unix') {
+ &Debug("Unix auth");
+ if((getpwnam($uname))[1] eq "") { #no such user!
+ $pwdcorrect = 0;
+ } else {
+ $contentpwd=(getpwnam($uname))[1];
+ my $pwauth_path="/usr/local/sbin/pwauth";
+ unless ($contentpwd eq 'x') {
+ $pwdcorrect=
+ (crypt($upass,$contentpwd) eq
+ $contentpwd);
+ }
+
+ elsif (-e $pwauth_path) {
+ open PWAUTH, "|$pwauth_path" or
+ die "Cannot invoke authentication";
+ print PWAUTH "$uname\n$upass\n";
+ close PWAUTH;
+ $pwdcorrect=!$?;
+ }
+ }
+ } elsif ($howpwd eq 'krb4') {
+ my $null=pack("C",0);
+ unless ($upass=~/$null/) {
+ my $krb4_error = &Authen::Krb4::get_pw_in_tkt
+ ($uname,"",$contentpwd,'krbtgt',
+ $contentpwd,1,$upass);
+ if (!$krb4_error) {
+ $pwdcorrect = 1;
+ } else {
+ $pwdcorrect=0;
+ # log error if it is not a bad password
+ if ($krb4_error != 62) {
+ &logthis('krb4:'.$uname.','.
+ &Authen::Krb4::get_err_txt($Authen::Krb4::error));
+ }
+ }
+ }
+ } elsif ($howpwd eq 'krb5') {
+ my $null=pack("C",0);
+ unless ($upass=~/$null/) {
+ my $krbclient=&Authen::Krb5::parse_name($uname.'@'.$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,$upass,$credentials);
# unless ($krbreturn) {
# &logthis("Krb5 Error: ".
# &Authen::Krb5::error());
# }
- $pwdcorrect = ($krbreturn == 1);
- } else { $pwdcorrect=0; }
- } elsif ($howpwd eq 'localauth') {
- $pwdcorrect=&localauth::localauth($uname,$upass,
- $contentpwd);
- }
- if ($pwdcorrect) {
- print $client "authorized\n";
- } else {
- print $client "non_authorized\n";
- }
- } else {
- print $client "unknown_user\n";
- }
- } else {
- print $client "refused\n";
- }
+ $pwdcorrect = ($krbreturn == 1);
+ } else { $pwdcorrect=0; }
+ } elsif ($howpwd eq 'localauth') {
+ $pwdcorrect=&localauth::localauth($uname,$upass,
+ $contentpwd);
+ }
+ if ($pwdcorrect) {
+ print $client "authorized\n";
+ } else {
+ print $client "non_authorized\n";
+ }
+ } else {
+ print $client "unknown_user\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# ---------------------------------------------------------------------- passwd
- } elsif ($userinput =~ /^passwd/) {
- if ($wasenc==1) {
- my
- ($cmd,$udom,$uname,$upass,$npass)=split(/:/,$userinput);
- chomp($npass);
- $upass=&unescape($upass);
- $npass=&unescape($npass);
- &Debug("Trying to change password for $uname");
- 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') {
- &Debug("internal auth");
- 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"; }
- &logthis("Result of password change for $uname: pwchange_success");
- print $client "ok\n";
- } else {
- print $client "non_authorized\n";
- }
- } elsif ($howpwd eq 'unix') {
- # Unix means we have to access /etc/password
- # one way or another.
- # First: Make sure the current password is
- # correct
- &Debug("auth is unix");
- $contentpwd=(getpwnam($uname))[1];
- my $pwdcorrect = "0";
- my $pwauth_path="/usr/local/sbin/pwauth";
- unless ($contentpwd eq 'x') {
- $pwdcorrect=
- (crypt($upass,$contentpwd) eq $contentpwd);
- } elsif (-e $pwauth_path) {
- open PWAUTH, "|$pwauth_path" or
- die "Cannot invoke authentication";
- print PWAUTH "$uname\n$upass\n";
- close PWAUTH;
- &Debug("exited pwauth with $? ($uname,$upass) ");
- $pwdcorrect=($? == 0);
- }
- if ($pwdcorrect) {
- 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($?));
- print $client "$result\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";
- }
+ } elsif ($userinput =~ /^passwd/) { # encoded and client
+ if (($wasenc==1) && isClient) {
+ my
+ ($cmd,$udom,$uname,$upass,$npass)=split(/:/,$userinput);
+ chomp($npass);
+ $upass=&unescape($upass);
+ $npass=&unescape($npass);
+ &Debug("Trying to change password for $uname");
+ 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') {
+ &Debug("internal auth");
+ if (crypt($upass,$contentpwd) eq $contentpwd) {
+ my $salt=time;
+ $salt=substr($salt,6,2);
+ my $ncpass=crypt($npass,$salt);
+ {
+ my $pf;
+ if ($pf = IO::File->new(">$passfilename")) {
+ print $pf "internal:$ncpass\n";
+ &logthis("Result of password change for $uname: pwchange_success");
+ print $client "ok\n";
+ } else {
+ &logthis("Unable to open $uname passwd to change password");
+ print $client "non_authorized\n";
+ }
+ }
+
+ } else {
+ print $client "non_authorized\n";
+ }
+ } elsif ($howpwd eq 'unix') {
+ # Unix means we have to access /etc/password
+ # one way or another.
+ # First: Make sure the current password is
+ # correct
+ &Debug("auth is unix");
+ $contentpwd=(getpwnam($uname))[1];
+ my $pwdcorrect = "0";
+ my $pwauth_path="/usr/local/sbin/pwauth";
+ unless ($contentpwd eq 'x') {
+ $pwdcorrect=
+ (crypt($upass,$contentpwd) eq $contentpwd);
+ } elsif (-e $pwauth_path) {
+ open PWAUTH, "|$pwauth_path" or
+ die "Cannot invoke authentication";
+ print PWAUTH "$uname\n$upass\n";
+ close PWAUTH;
+ &Debug("exited pwauth with $? ($uname,$upass) ");
+ $pwdcorrect=($? == 0);
+ }
+ if ($pwdcorrect) {
+ 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($?));
+ print $client "$result\n";
+ } else {
+ print $client "non_authorized\n";
+ }
+ } else {
+ print $client "auth_mode_error\n";
+ }
+ } else {
+ print $client "unknown_user\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# -------------------------------------------------------------------- makeuser
- } elsif ($userinput =~ /^makeuser/) {
- &Debug("Make user received");
- my $oldumask=umask(0077);
- if ($wasenc==1) {
- my
- ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
- &Debug("cmd =".$cmd." $udom =".$udom.
- " uname=".$uname);
- chomp($npass);
- $npass=&unescape($npass);
- my $proname=propath($udom,$uname);
- my $passfilename="$proname/passwd";
- &Debug("Password file created will be:".
- $passfilename);
- if (-e $passfilename) {
- print $client "already_exists\n";
- } elsif ($udom ne $currentdomainid) {
- print $client "not_right_domain\n";
- } else {
- my @fpparts=split(/\//,$proname);
- my $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2];
- my $fperror='';
- for (my $i=3;$i<=$#fpparts;$i++) {
- $fpnow.='/'.$fpparts[$i];
- unless (-e $fpnow) {
- unless (mkdir($fpnow,0777)) {
- $fperror="error: ".($!+0)
- ." mkdir failed while attempting "
- ."makeuser\n";
- }
- }
- }
- unless ($fperror) {
- my $result=&make_passwd_file($uname, $umode,$npass,
- $passfilename);
- print $client $result;
- } else {
- print $client "$fperror\n";
- }
- }
- } else {
- print $client "refused\n";
- }
- umask($oldumask);
+ } elsif ($userinput =~ /^makeuser/) { # encoded and client.
+ &Debug("Make user received");
+ my $oldumask=umask(0077);
+ if (($wasenc==1) && isClient) {
+ my
+ ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
+ &Debug("cmd =".$cmd." $udom =".$udom.
+ " uname=".$uname);
+ chomp($npass);
+ $npass=&unescape($npass);
+ my $proname=propath($udom,$uname);
+ my $passfilename="$proname/passwd";
+ &Debug("Password file created will be:".
+ $passfilename);
+ if (-e $passfilename) {
+ print $client "already_exists\n";
+ } elsif ($udom ne $currentdomainid) {
+ print $client "not_right_domain\n";
+ } else {
+ my @fpparts=split(/\//,$proname);
+ my $fpnow=$fpparts[0].'/'.$fpparts[1].'/'.$fpparts[2];
+ my $fperror='';
+ for (my $i=3;$i<=$#fpparts;$i++) {
+ $fpnow.='/'.$fpparts[$i];
+ unless (-e $fpnow) {
+ unless (mkdir($fpnow,0777)) {
+ $fperror="error: ".($!+0)
+ ." mkdir failed while attempting "
+ ."makeuser";
+ }
+ }
+ }
+ unless ($fperror) {
+ my $result=&make_passwd_file($uname, $umode,$npass,
+ $passfilename);
+ print $client $result;
+ } else {
+ print $client "$fperror\n";
+ }
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
+ umask($oldumask);
# -------------------------------------------------------------- changeuserauth
- } elsif ($userinput =~ /^changeuserauth/) {
- &Debug("Changing authorization");
- if ($wasenc==1) {
- my
- ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
- chomp($npass);
- &Debug("cmd = ".$cmd." domain= ".$udom.
- "uname =".$uname." umode= ".$umode);
- $npass=&unescape($npass);
- my $proname=&propath($udom,$uname);
- my $passfilename="$proname/passwd";
- if ($udom ne $currentdomainid) {
- print $client "not_right_domain\n";
- } else {
- my $result=&make_passwd_file($uname, $umode,$npass,
- $passfilename);
- print $client $result;
- }
- } else {
- print $client "refused\n";
- }
+ } elsif ($userinput =~ /^changeuserauth/) { # encoded & client
+ &Debug("Changing authorization");
+ if (($wasenc==1) && isClient) {
+ my
+ ($cmd,$udom,$uname,$umode,$npass)=split(/:/,$userinput);
+ chomp($npass);
+ &Debug("cmd = ".$cmd." domain= ".$udom.
+ "uname =".$uname." umode= ".$umode);
+ $npass=&unescape($npass);
+ my $proname=&propath($udom,$uname);
+ my $passfilename="$proname/passwd";
+ if ($udom ne $currentdomainid) {
+ print $client "not_right_domain\n";
+ } else {
+ my $result=&make_passwd_file($uname, $umode,$npass,
+ $passfilename);
+ print $client $result;
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# ------------------------------------------------------------------------ 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";
- }
+ } elsif ($userinput =~ /^home/) { # client clear or encoded
+ if(isClient) {
+ 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";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# ---------------------------------------------------------------------- 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);
- my $now=time;
- my $since=$now-$atime;
- if ($since>$perlvar{'lonExpire'}) {
- my $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 $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');
- }
- }
- rename($transname,$fname);
- }
- }
- print $client "ok\n";
- } else {
- print $client "not_found\n";
- }
- } else {
- print $client "rejected\n";
- }
+ } elsif ($userinput =~ /^update/) { # client clear or encoded.
+ if(isClient) {
+ 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);
+ 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;
+ {
+ 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 $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');
+ }
+ }
+ rename($transname,$fname);
+ }
+ }
+ print $client "ok\n";
+ } else {
+ print $client "not_found\n";
+ }
+ } else {
+ print $client "rejected\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# -------------------------------------- fetch a user file from a remote server
- } elsif ($userinput =~ /^fetchuserfile/) {
- my ($cmd,$fname)=split(/:/,$userinput);
- 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 $transname=$udir.'/'.$ufile;
- my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
- 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)");
- print $client "failed\n";
- } else {
- print $client "ok\n";
- }
- } else {
- print $client "not_home\n";
- }
+ } elsif ($userinput =~ /^fetchuserfile/) { # Client clear or enc.
+ if(isClient) {
+ my ($cmd,$fname)=split(/:/,$userinput);
+ my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
+ my $udir=propath($udom,$uname).'/userfiles';
+ unless (-e $udir) { mkdir($udir,0770); }
+ if (-e $udir) {
+ $ufile=~s/^[\.\~]+//;
+ my $path = $udir;
+ if ($ufile =~m|(.+)/([^/]+)$|) {
+ my @parts=split('/',$1);
+ foreach my $part (@parts) {
+ $path .= '/'.$part;
+ if ((-e $path)!=1) {
+ mkdir($path,0770);
+ }
+ }
+ }
+ my $destname=$udir.'/'.$ufile;
+ my $transname=$udir.'/'.$ufile.'.in.transit';
+ my $remoteurl='http://'.$clientip.'/userfiles/'.$fname;
+ 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)");
+ print $client "failed\n";
+ } else {
+ if (!rename($transname,$destname)) {
+ &logthis("Unable to move $transname to $destname");
+ unlink($transname);
+ print $client "failed\n";
+ } else {
+ print $client "ok\n";
+ }
+ }
+ } else {
+ print $client "not_home\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+ }
+# --------------------------------------------------------- remove a user file
+ } elsif ($userinput =~ /^removeuserfile/) { # Client clear or enc.
+ if(isClient) {
+ my ($cmd,$fname)=split(/:/,$userinput);
+ my ($udom,$uname,$ufile) = ($fname =~ m|^([^/]+)/([^/]+)/(.+)$|);
+ &logthis("$udom - $uname - $ufile");
+ if ($ufile =~m|/\.\./|) {
+ # any files paths with /../ in them refuse
+ # to deal with
+ print $client "refused\n";
+ } else {
+ my $udir=propath($udom,$uname);
+ if (-e $udir) {
+ my $file=$udir.'/userfiles/'.$ufile;
+ if (-e $file) {
+ unlink($file);
+ if (-e $file) {
+ print $client "failed\n";
+ } else {
+ print $client "ok\n";
+ }
+ } else {
+ print $client "not_found\n";
+ }
+ } else {
+ print $client "not_home\n";
+ }
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+ }
# ------------------------------------------ authenticate access to a user file
- } elsif ($userinput =~ /^tokenauthuserfile/) {
- my ($cmd,$fname,$session)=split(/:/,$userinput);
- 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);
- print $client $reply."\n";
- } else {
- print $client "invalid_token\n";
- }
+ } elsif ($userinput =~ /^tokenauthuserfile/) { # Client only
+ if(isClient) {
+ my ($cmd,$fname,$session)=split(/:/,$userinput);
+ chomp($session);
+ my $reply='non_auth';
+ if (open(ENVIN,$perlvar{'lonIDsDir'}.'/'.
+ $session.'.id')) {
+ while (my $line=<ENVIN>) {
+ if ($line=~ m|userfile\.\Q$fname\E\=|) { $reply='ok'; }
+ }
+ close(ENVIN);
+ print $client $reply."\n";
+ } else {
+ print $client "invalid_token\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# ----------------------------------------------------------------- unsubscribe
- } elsif ($userinput =~ /^unsub/) {
- my ($cmd,$fname)=split(/:/,$userinput);
- if (-e $fname) {
- print $client &unsub($client,$fname,$clientip);
- } else {
- print $client "not_found\n";
- }
+ } elsif ($userinput =~ /^unsub/) {
+ if(isClient) {
+ my ($cmd,$fname)=split(/:/,$userinput);
+ if (-e $fname) {
+ print $client &unsub($fname,$clientip);
+ } else {
+ print $client "not_found\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# ------------------------------------------------------------------- subscribe
- } elsif ($userinput =~ /^sub/) {
- print $client &subscribe($userinput,$clientip);
+ } elsif ($userinput =~ /^sub/) {
+ if(isClient) {
+ print $client &subscribe($userinput,$clientip);
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# ------------------------------------------------------------- current version
- } elsif ($userinput =~ /^currentversion/) {
- my ($cmd,$fname)=split(/:/,$userinput);
- print $client ¤tversion($fname)."\n";
+ } elsif ($userinput =~ /^currentversion/) {
+ if(isClient) {
+ my ($cmd,$fname)=split(/:/,$userinput);
+ print $client ¤tversion($fname)."\n";
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# ------------------------------------------------------------------------- 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: ".($!+0)
- ." IO::File->new Failed "
- ."while attempting log\n";
- }
- }
+ } elsif ($userinput =~ /^log/) {
+ if(isClient) {
+ 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:$clientname:$what\n";
+ print $client "ok\n";
+ } else {
+ print $client "error: ".($!+0)
+ ." IO::File->new Failed "
+ ."while attempting log\n";
+ }
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# ------------------------------------------------------------------------- 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;
- unless ($namespace=~/^nohist\_/) {
- my $hfh;
- if (
- $hfh=IO::File->new(">>$proname/$namespace.hist")
- ) { print $hfh "P:$now:$what\n"; }
- }
- my @pairs=split(/\&/,$what);
- my %hash;
- if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
- foreach my $pair (@pairs) {
- my ($key,$value)=split(/=/,$pair);
- $hash{$key}=$value;
- }
- if (untie(%hash)) {
- print $client "ok\n";
- } else {
- print $client "error: ".($!+0)
- ." untie(GDBM) failed ".
- "while attempting put\n";
- }
- } else {
- print $client "error: ".($!)
- ." tie(GDBM) Failed ".
- "while attempting put\n";
- }
- } else {
- print $client "refused\n";
- }
+ } elsif ($userinput =~ /^put/) {
+ if(isClient) {
+ 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;
+ unless ($namespace=~/^nohist\_/) {
+ my $hfh;
+ if (
+ $hfh=IO::File->new(">>$proname/$namespace.hist")
+ ) { print $hfh "P:$now:$what\n"; }
+ }
+ my @pairs=split(/\&/,$what);
+ my %hash;
+ if (tie(%hash,'GDBM_File',
+ "$proname/$namespace.db",
+ &GDBM_WRCREAT(),0640)) {
+ foreach my $pair (@pairs) {
+ my ($key,$value)=split(/=/,$pair);
+ $hash{$key}=$value;
+ }
+ if (untie(%hash)) {
+ print $client "ok\n";
+ } else {
+ print $client "error: ".($!+0)
+ ." untie(GDBM) failed ".
+ "while attempting put\n";
+ }
+ } else {
+ print $client "error: ".($!)
+ ." tie(GDBM) Failed ".
+ "while attempting put\n";
+ }
+ } else {
+ print $client "refused\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
+# ------------------------------------------------------------------- inc
+ } elsif ($userinput =~ /^inc:/) {
+ if(isClient) {
+ 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;
+ unless ($namespace=~/^nohist\_/) {
+ my $hfh;
+ if (
+ $hfh=IO::File->new(">>$proname/$namespace.hist")
+ ) { print $hfh "P:$now:$what\n"; }
+ }
+ my @pairs=split(/\&/,$what);
+ my %hash;
+ if (tie(%hash,'GDBM_File',
+ "$proname/$namespace.db",
+ &GDBM_WRCREAT(),0640)) {
+ foreach my $pair (@pairs) {
+ my ($key,$value)=split(/=/,$pair);
+ # We could check that we have a number...
+ if (! defined($value) || $value eq '') {
+ $value = 1;
+ }
+ $hash{$key}+=$value;
+ }
+ if (untie(%hash)) {
+ print $client "ok\n";
+ } else {
+ print $client "error: ".($!+0)
+ ." untie(GDBM) failed ".
+ "while attempting inc\n";
+ }
+ } else {
+ print $client "error: ".($!)
+ ." tie(GDBM) Failed ".
+ "while attempting inc\n";
+ }
+ } else {
+ print $client "refused\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# -------------------------------------------------------------------- rolesput
- } elsif ($userinput =~ /^rolesput/) {
- &Debug("rolesput");
- if ($wasenc==1) {
- my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
- =split(/:/,$userinput);
- &Debug("cmd = ".$cmd." exedom= ".$exedom.
- "user = ".$exeuser." udom=".$udom.
- "what = ".$what);
- 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);
- my %hash;
- if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
- foreach my $pair (@pairs) {
- my ($key,$value)=split(/=/,$pair);
- &ManagePermissions($key, $udom, $uname,
- &GetAuthType( $udom,
- $uname));
- $hash{$key}=$value;
- }
- if (untie(%hash)) {
- print $client "ok\n";
- } else {
- print $client "error: ".($!+0)
- ." untie(GDBM) Failed ".
- "while attempting rolesput\n";
- }
- } else {
- print $client "error: ".($!+0)
- ." tie(GDBM) Failed ".
- "while attempting rolesput\n";
- }
- } else {
- print $client "refused\n";
- }
+ } elsif ($userinput =~ /^rolesput/) {
+ if(isClient) {
+ &Debug("rolesput");
+ if ($wasenc==1) {
+ my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
+ =split(/:/,$userinput);
+ &Debug("cmd = ".$cmd." exedom= ".$exedom.
+ "user = ".$exeuser." udom=".$udom.
+ "what = ".$what);
+ 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);
+ my %hash;
+ if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
+ foreach my $pair (@pairs) {
+ my ($key,$value)=split(/=/,$pair);
+ &ManagePermissions($key, $udom, $uname,
+ &GetAuthType( $udom,
+ $uname));
+ $hash{$key}=$value;
+ }
+ if (untie(%hash)) {
+ print $client "ok\n";
+ } else {
+ print $client "error: ".($!+0)
+ ." untie(GDBM) Failed ".
+ "while attempting rolesput\n";
+ }
+ } else {
+ print $client "error: ".($!+0)
+ ." tie(GDBM) Failed ".
+ "while attempting rolesput\n";
+ }
+ } else {
+ print $client "refused\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# -------------------------------------------------------------------- rolesdel
- } elsif ($userinput =~ /^rolesdel/) {
- &Debug("rolesdel");
- if ($wasenc==1) {
- my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
- =split(/:/,$userinput);
- &Debug("cmd = ".$cmd." exedom= ".$exedom.
- "user = ".$exeuser." udom=".$udom.
- "what = ".$what);
- 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 "D:$now:$exedom:$exeuser:$what\n";
- }
- }
- my @rolekeys=split(/\&/,$what);
- my %hash;
- if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
- foreach my $key (@rolekeys) {
- delete $hash{$key};
- }
- if (untie(%hash)) {
- print $client "ok\n";
- } else {
- print $client "error: ".($!+0)
- ." untie(GDBM) Failed ".
- "while attempting rolesdel\n";
- }
- } else {
- print $client "error: ".($!+0)
- ." tie(GDBM) Failed ".
- "while attempting rolesdel\n";
- }
- } else {
- print $client "refused\n";
- }
+ } elsif ($userinput =~ /^rolesdel/) {
+ if(isClient) {
+ &Debug("rolesdel");
+ if ($wasenc==1) {
+ my ($cmd,$exedom,$exeuser,$udom,$uname,$what)
+ =split(/:/,$userinput);
+ &Debug("cmd = ".$cmd." exedom= ".$exedom.
+ "user = ".$exeuser." udom=".$udom.
+ "what = ".$what);
+ 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 "D:$now:$exedom:$exeuser:$what\n";
+ }
+ }
+ my @rolekeys=split(/\&/,$what);
+ my %hash;
+ if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
+ foreach my $key (@rolekeys) {
+ delete $hash{$key};
+ }
+ if (untie(%hash)) {
+ print $client "ok\n";
+ } else {
+ print $client "error: ".($!+0)
+ ." untie(GDBM) Failed ".
+ "while attempting rolesdel\n";
+ }
+ } else {
+ print $client "error: ".($!+0)
+ ." tie(GDBM) Failed ".
+ "while attempting rolesdel\n";
+ }
+ } else {
+ print $client "refused\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# ------------------------------------------------------------------------- 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='';
- my %hash;
- if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
- for (my $i=0;$i<=$#queries;$i++) {
- $qresult.="$hash{$queries[$i]}&";
- }
- if (untie(%hash)) {
- $qresult=~s/\&$//;
- print $client "$qresult\n";
- } else {
- print $client "error: ".($!+0)
- ." untie(GDBM) Failed ".
- "while attempting get\n";
- }
- } else {
- if ($!+0 == 2) {
- print $client "error:No such file or ".
- "GDBM reported bad block error\n";
- } else {
- print $client "error: ".($!+0)
- ." tie(GDBM) Failed ".
- "while attempting get\n";
- }
- }
+ } elsif ($userinput =~ /^get/) {
+ if(isClient) {
+ 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='';
+ my %hash;
+ if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
+ for (my $i=0;$i<=$#queries;$i++) {
+ $qresult.="$hash{$queries[$i]}&";
+ }
+ if (untie(%hash)) {
+ $qresult=~s/\&$//;
+ print $client "$qresult\n";
+ } else {
+ print $client "error: ".($!+0)
+ ." untie(GDBM) Failed ".
+ "while attempting get\n";
+ }
+ } else {
+ if ($!+0 == 2) {
+ print $client "error:No such file or ".
+ "GDBM reported bad block error\n";
+ } else {
+ print $client "error: ".($!+0)
+ ." tie(GDBM) Failed ".
+ "while attempting get\n";
+ }
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# ------------------------------------------------------------------------ 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='';
- my %hash;
- if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
- for (my $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: ".($!+0)
- ." untie(GDBM) Failed ".
- "while attempting eget\n";
- }
- } else {
- print $client "error: ".($!+0)
- ." tie(GDBM) Failed ".
- "while attempting eget\n";
- }
+ } elsif ($userinput =~ /^eget/) {
+ if (isClient) {
+ 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='';
+ my %hash;
+ if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
+ for (my $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: ".($!+0)
+ ." untie(GDBM) Failed ".
+ "while attempting eget\n";
+ }
+ } else {
+ print $client "error: ".($!+0)
+ ." tie(GDBM) Failed ".
+ "while attempting eget\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# ------------------------------------------------------------------------- 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;
- unless ($namespace=~/^nohist\_/) {
- my $hfh;
- if (
- $hfh=IO::File->new(">>$proname/$namespace.hist")
- ) { print $hfh "D:$now:$what\n"; }
- }
- my @keys=split(/\&/,$what);
- my %hash;
- if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
- foreach my $key (@keys) {
- delete($hash{$key});
- }
- if (untie(%hash)) {
- print $client "ok\n";
- } else {
- print $client "error: ".($!+0)
- ." untie(GDBM) Failed ".
- "while attempting del\n";
- }
- } else {
- print $client "error: ".($!+0)
- ." tie(GDBM) Failed ".
- "while attempting del\n";
- }
+ } elsif ($userinput =~ /^del/) {
+ if(isClient) {
+ 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;
+ unless ($namespace=~/^nohist\_/) {
+ my $hfh;
+ if (
+ $hfh=IO::File->new(">>$proname/$namespace.hist")
+ ) { print $hfh "D:$now:$what\n"; }
+ }
+ my @keys=split(/\&/,$what);
+ my %hash;
+ if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_WRCREAT(),0640)) {
+ foreach my $key (@keys) {
+ delete($hash{$key});
+ }
+ if (untie(%hash)) {
+ print $client "ok\n";
+ } else {
+ print $client "error: ".($!+0)
+ ." untie(GDBM) Failed ".
+ "while attempting del\n";
+ }
+ } else {
+ print $client "error: ".($!+0)
+ ." tie(GDBM) Failed ".
+ "while attempting del\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# ------------------------------------------------------------------------ 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='';
- my %hash;
- if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
- foreach my $key (keys %hash) {
- $qresult.="$key&";
- }
- if (untie(%hash)) {
- $qresult=~s/\&$//;
- print $client "$qresult\n";
- } else {
- print $client "error: ".($!+0)
- ." untie(GDBM) Failed ".
- "while attempting keys\n";
- }
- } else {
- print $client "error: ".($!+0)
- ." tie(GDBM) Failed ".
- "while attempting keys\n";
- }
+ } elsif ($userinput =~ /^keys/) {
+ if(isClient) {
+ my ($cmd,$udom,$uname,$namespace)
+ =split(/:/,$userinput);
+ $namespace=~s/\//\_/g;
+ $namespace=~s/\W//g;
+ my $proname=propath($udom,$uname);
+ my $qresult='';
+ my %hash;
+ if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
+ foreach my $key (keys %hash) {
+ $qresult.="$key&";
+ }
+ if (untie(%hash)) {
+ $qresult=~s/\&$//;
+ print $client "$qresult\n";
+ } else {
+ print $client "error: ".($!+0)
+ ." untie(GDBM) Failed ".
+ "while attempting keys\n";
+ }
+ } else {
+ print $client "error: ".($!+0)
+ ." tie(GDBM) Failed ".
+ "while attempting keys\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# ----------------------------------------------------------------- dumpcurrent
- } elsif ($userinput =~ /^currentdump/) {
- my ($cmd,$udom,$uname,$namespace)
- =split(/:/,$userinput);
- $namespace=~s/\//\_/g;
- $namespace=~s/\W//g;
- my $qresult='';
- my $proname=propath($udom,$uname);
- my %hash;
- if (tie(%hash,'GDBM_File',
- "$proname/$namespace.db",
- &GDBM_READER(),0640)) {
- # 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 %data = ();
- while (my ($key,$value) = each(%hash)) {
- 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(%hash)) {
- while (my ($symb,$param_hash) = each(%data)) {
- while(my ($param,$value) = each (%$param_hash)){
- next if ($param =~ /^v\./);
- $qresult.=$symb.':'.$param.'='.$value.'&';
- }
- }
- chop($qresult);
- print $client "$qresult\n";
- } else {
- print $client "error: ".($!+0)
- ." untie(GDBM) Failed ".
- "while attempting currentdump\n";
- }
- } else {
- print $client "error: ".($!+0)
- ." tie(GDBM) Failed ".
- "while attempting currentdump\n";
- }
+ } elsif ($userinput =~ /^currentdump/) {
+ if (isClient) {
+ my ($cmd,$udom,$uname,$namespace)
+ =split(/:/,$userinput);
+ $namespace=~s/\//\_/g;
+ $namespace=~s/\W//g;
+ my $qresult='';
+ my $proname=propath($udom,$uname);
+ my %hash;
+ if (tie(%hash,'GDBM_File',
+ "$proname/$namespace.db",
+ &GDBM_READER(),0640)) {
+ # 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 %data = ();
+ while (my ($key,$value) = each(%hash)) {
+ 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(%hash)) {
+ while (my ($symb,$param_hash) = each(%data)) {
+ while(my ($param,$value) = each (%$param_hash)){
+ next if ($param =~ /^v\./);
+ $qresult.=$symb.':'.$param.'='.$value.'&';
+ }
+ }
+ chop($qresult);
+ print $client "$qresult\n";
+ } else {
+ print $client "error: ".($!+0)
+ ." untie(GDBM) Failed ".
+ "while attempting currentdump\n";
+ }
+ } else {
+ print $client "error: ".($!+0)
+ ." tie(GDBM) Failed ".
+ "while attempting currentdump\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+ }
# ------------------------------------------------------------------------ dump
- } elsif ($userinput =~ /^dump/) {
- my ($cmd,$udom,$uname,$namespace,$regexp)
- =split(/:/,$userinput);
- $namespace=~s/\//\_/g;
- $namespace=~s/\W//g;
- if (defined($regexp)) {
- $regexp=&unescape($regexp);
- } else {
- $regexp='.';
- }
- my $qresult='';
- my $proname=propath($udom,$uname);
- my %hash;
- if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
- study($regexp);
- while (my ($key,$value) = each(%hash)) {
- if ($regexp eq '.') {
- $qresult.=$key.'='.$value.'&';
- } else {
- my $unescapeKey = &unescape($key);
- if (eval('$unescapeKey=~/$regexp/')) {
- $qresult.="$key=$value&";
- }
- }
- }
- if (untie(%hash)) {
- chop($qresult);
- print $client "$qresult\n";
- } else {
- print $client "error: ".($!+0)
- ." untie(GDBM) Failed ".
+ } elsif ($userinput =~ /^dump/) {
+ if(isClient) {
+ my ($cmd,$udom,$uname,$namespace,$regexp)
+ =split(/:/,$userinput);
+ $namespace=~s/\//\_/g;
+ $namespace=~s/\W//g;
+ if (defined($regexp)) {
+ $regexp=&unescape($regexp);
+ } else {
+ $regexp='.';
+ }
+ my $qresult='';
+ my $proname=propath($udom,$uname);
+ my %hash;
+ if (tie(%hash,'GDBM_File',"$proname/$namespace.db",&GDBM_READER(),0640)) {
+ while (my ($key,$value) = each(%hash)) {
+ if ($regexp eq '.') {
+ $qresult.=$key.'='.$value.'&';
+ } else {
+ my $unescapeKey = &unescape($key);
+ if (eval('$unescapeKey=~/$regexp/')) {
+ $qresult.="$key=$value&";
+ }
+ }
+ }
+ if (untie(%hash)) {
+ chop($qresult);
+ print $client "$qresult\n";
+ } else {
+ print $client "error: ".($!+0)
+ ." untie(GDBM) Failed ".
"while attempting dump\n";
- }
- } else {
- print $client "error: ".($!+0)
- ." tie(GDBM) Failed ".
- "while attempting dump\n";
- }
+ }
+ } else {
+ print $client "error: ".($!+0)
+ ." tie(GDBM) Failed ".
+ "while attempting dump\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# ----------------------------------------------------------------------- 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;
- unless ($namespace=~/^nohist\_/) {
- my $hfh;
- if (
- $hfh=IO::File->new(">>$proname/$namespace.hist")
- ) { print $hfh "P:$now:$rid:$what\n"; }
- }
- my @pairs=split(/\&/,$what);
- my %hash;
- 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 my $pair (@pairs) {
- my ($key,$value)=split(/=/,$pair);
- $allkeys.=$key.':';
- $hash{"$version:$rid:$key"}=$value;
- }
- $hash{"$version:$rid:timestamp"}=$now;
- $allkeys.='timestamp';
- $hash{"$version:keys:$rid"}=$allkeys;
- if (untie(%hash)) {
- print $client "ok\n";
- } else {
- print $client "error: ".($!+0)
- ." untie(GDBM) Failed ".
- "while attempting store\n";
- }
- } else {
- print $client "error: ".($!+0)
- ." tie(GDBM) Failed ".
- "while attempting store\n";
- }
- } else {
- print $client "refused\n";
- }
+ } elsif ($userinput =~ /^store/) {
+ if(isClient) {
+ 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;
+ unless ($namespace=~/^nohist\_/) {
+ my $hfh;
+ if (
+ $hfh=IO::File->new(">>$proname/$namespace.hist")
+ ) { print $hfh "P:$now:$rid:$what\n"; }
+ }
+ my @pairs=split(/\&/,$what);
+ my %hash;
+ 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 my $pair (@pairs) {
+ my ($key,$value)=split(/=/,$pair);
+ $allkeys.=$key.':';
+ $hash{"$version:$rid:$key"}=$value;
+ }
+ $hash{"$version:$rid:timestamp"}=$now;
+ $allkeys.='timestamp';
+ $hash{"$version:keys:$rid"}=$allkeys;
+ if (untie(%hash)) {
+ print $client "ok\n";
+ } else {
+ print $client "error: ".($!+0)
+ ." untie(GDBM) Failed ".
+ "while attempting store\n";
+ }
+ } else {
+ print $client "error: ".($!+0)
+ ." tie(GDBM) Failed ".
+ "while attempting store\n";
+ }
+ } else {
+ print $client "refused\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# --------------------------------------------------------------------- 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='';
- 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/\&$//;
- print $client "$qresult\n";
- } else {
- print $client "error: ".($!+0)
- ." untie(GDBM) Failed ".
- "while attempting restore\n";
- }
- } else {
- print $client "error: ".($!+0)
- ." tie(GDBM) Failed ".
- "while attempting restore\n";
- }
+ } elsif ($userinput =~ /^restore/) {
+ if(isClient) {
+ 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/\&$//;
+ print $client "$qresult\n";
+ } else {
+ print $client "error: ".($!+0)
+ ." untie(GDBM) Failed ".
+ "while attempting restore\n";
+ }
+ } else {
+ print $client "error: ".($!+0)
+ ." tie(GDBM) Failed ".
+ "while attempting restore\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# -------------------------------------------------------------------- chatsend
- } elsif ($userinput =~ /^chatsend/) {
- my ($cmd,$cdom,$cnum,$newpost)=split(/\:/,$userinput);
- &chatadd($cdom,$cnum,$newpost);
- print $client "ok\n";
+ } elsif ($userinput =~ /^chatsend/) {
+ if(isClient) {
+ my ($cmd,$cdom,$cnum,$newpost)=split(/\:/,$userinput);
+ &chatadd($cdom,$cnum,$newpost);
+ print $client "ok\n";
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# -------------------------------------------------------------------- chatretr
- } elsif ($userinput =~ /^chatretr/) {
- my
- ($cmd,$cdom,$cnum,$udom,$uname)=split(/\:/,$userinput);
- my $reply='';
- foreach (&getchat($cdom,$cnum,$udom,$uname)) {
- $reply.=&escape($_).':';
- }
- $reply=~s/\:$//;
- print $client $reply."\n";
+ } elsif ($userinput =~ /^chatretr/) {
+ if(isClient) {
+ my
+ ($cmd,$cdom,$cnum,$udom,$uname)=split(/\:/,$userinput);
+ my $reply='';
+ foreach (&getchat($cdom,$cnum,$udom,$uname)) {
+ $reply.=&escape($_).':';
+ }
+ $reply=~s/\:$//;
+ print $client $reply."\n";
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# ------------------------------------------------------------------- querysend
- } elsif ($userinput =~ /^querysend/) {
- my ($cmd,$query,
- $arg1,$arg2,$arg3)=split(/\:/,$userinput);
- $query=~s/\n*$//g;
- print $client "".
- sqlreply("$hostid{$clientip}\&$query".
- "\&$arg1"."\&$arg2"."\&$arg3")."\n";
+ } elsif ($userinput =~ /^querysend/) {
+ if (isClient) {
+ my ($cmd,$query,
+ $arg1,$arg2,$arg3)=split(/\:/,$userinput);
+ $query=~s/\n*$//g;
+ print $client "".
+ sqlreply("$clientname\&$query".
+ "\&$arg1"."\&$arg2"."\&$arg3")."\n";
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# ------------------------------------------------------------------ queryreply
- } elsif ($userinput =~ /^queryreply/) {
- 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;
- print $client "ok\n";
- }
- else {
- print $client "error: ".($!+0)
- ." IO::File->new Failed ".
- "while attempting queryreply\n";
- }
+ } elsif ($userinput =~ /^queryreply/) {
+ if(isClient) {
+ 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;
+ print $client "ok\n";
+ }
+ else {
+ print $client "error: ".($!+0)
+ ." IO::File->new Failed ".
+ "while attempting queryreply\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# ----------------------------------------------------------------- courseidput
- } elsif ($userinput =~ /^courseidput/) {
- my ($cmd,$udom,$what)=split(/:/,$userinput);
- chomp($what);
- $udom=~s/\W//g;
- my $proname=
- "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
- my $now=time;
- my @pairs=split(/\&/,$what);
- my %hash;
- if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
- foreach my $pair (@pairs) {
- my ($key,$value)=split(/=/,$pair);
- $hash{$key}=$value.':'.$now;
- }
- if (untie(%hash)) {
- print $client "ok\n";
- } else {
- print $client "error: ".($!+0)
- ." untie(GDBM) Failed ".
- "while attempting courseidput\n";
- }
- } else {
- print $client "error: ".($!+0)
- ." tie(GDBM) Failed ".
- "while attempting courseidput\n";
- }
+ } elsif ($userinput =~ /^courseidput/) {
+ if(isClient) {
+ my ($cmd,$udom,$what)=split(/:/,$userinput);
+ chomp($what);
+ $udom=~s/\W//g;
+ my $proname=
+ "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
+ my $now=time;
+ my @pairs=split(/\&/,$what);
+ my %hash;
+ if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
+ foreach my $pair (@pairs) {
+ my ($key,$value)=split(/=/,$pair);
+ $hash{$key}=$value.':'.$now;
+ }
+ if (untie(%hash)) {
+ print $client "ok\n";
+ } else {
+ print $client "error: ".($!+0)
+ ." untie(GDBM) Failed ".
+ "while attempting courseidput\n";
+ }
+ } else {
+ print $client "error: ".($!+0)
+ ." tie(GDBM) Failed ".
+ "while attempting courseidput\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# ---------------------------------------------------------------- courseiddump
- } elsif ($userinput =~ /^courseiddump/) {
- my ($cmd,$udom,$since,$description)
- =split(/:/,$userinput);
- if (defined($description)) {
- $description=&unescape($description);
- } else {
- $description='.';
- }
- unless (defined($since)) { $since=0; }
- my $qresult='';
- my $proname=
- "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
- my %hash;
- if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
- while (my ($key,$value) = each(%hash)) {
- my ($descr,$lasttime)=split(/\:/,$value);
- if ($lasttime<$since) { next; }
- if ($description eq '.') {
- $qresult.=$key.'='.$descr.'&';
- } else {
- my $unescapeVal = &unescape($descr);
- if (eval('$unescapeVal=~/$description/i')) {
- $qresult.="$key=$descr&";
- }
- }
- }
- if (untie(%hash)) {
- chop($qresult);
- print $client "$qresult\n";
- } else {
- print $client "error: ".($!+0)
- ." untie(GDBM) Failed ".
- "while attempting courseiddump\n";
- }
- } else {
- print $client "error: ".($!+0)
- ." tie(GDBM) Failed ".
- "while attempting courseiddump\n";
- }
+ } elsif ($userinput =~ /^courseiddump/) {
+ if(isClient) {
+ my ($cmd,$udom,$since,$description)
+ =split(/:/,$userinput);
+ if (defined($description)) {
+ $description=&unescape($description);
+ } else {
+ $description='.';
+ }
+ unless (defined($since)) { $since=0; }
+ my $qresult='';
+ my $proname=
+ "$perlvar{'lonUsersDir'}/$udom/nohist_courseids";
+ my %hash;
+ if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
+ while (my ($key,$value) = each(%hash)) {
+ my ($descr,$lasttime)=split(/\:/,$value);
+ if ($lasttime<$since) { next; }
+ if ($description eq '.') {
+ $qresult.=$key.'='.$descr.'&';
+ } else {
+ my $unescapeVal = &unescape($descr);
+ if (eval('$unescapeVal=~/\Q$description\E/i')) {
+ $qresult.="$key=$descr&";
+ }
+ }
+ }
+ if (untie(%hash)) {
+ chop($qresult);
+ print $client "$qresult\n";
+ } else {
+ print $client "error: ".($!+0)
+ ." untie(GDBM) Failed ".
+ "while attempting courseiddump\n";
+ }
+ } else {
+ print $client "error: ".($!+0)
+ ." tie(GDBM) Failed ".
+ "while attempting courseiddump\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# ----------------------------------------------------------------------- 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);
- my %hash;
- if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
- foreach my $pair (@pairs) {
- my ($key,$value)=split(/=/,$pair);
- $hash{$key}=$value;
- }
- if (untie(%hash)) {
- print $client "ok\n";
- } else {
- print $client "error: ".($!+0)
- ." untie(GDBM) Failed ".
- "while attempting idput\n";
- }
- } else {
- print $client "error: ".($!+0)
- ." tie(GDBM) Failed ".
- "while attempting idput\n";
- }
+ } elsif ($userinput =~ /^idput/) {
+ if(isClient) {
+ 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);
+ my %hash;
+ if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_WRCREAT(),0640)) {
+ foreach my $pair (@pairs) {
+ my ($key,$value)=split(/=/,$pair);
+ $hash{$key}=$value;
+ }
+ if (untie(%hash)) {
+ print $client "ok\n";
+ } else {
+ print $client "error: ".($!+0)
+ ." untie(GDBM) Failed ".
+ "while attempting idput\n";
+ }
+ } else {
+ print $client "error: ".($!+0)
+ ." tie(GDBM) Failed ".
+ "while attempting idput\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# ----------------------------------------------------------------------- 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='';
- my %hash;
- if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
- for (my $i=0;$i<=$#queries;$i++) {
- $qresult.="$hash{$queries[$i]}&";
- }
- if (untie(%hash)) {
- $qresult=~s/\&$//;
- print $client "$qresult\n";
- } else {
- print $client "error: ".($!+0)
- ." untie(GDBM) Failed ".
- "while attempting idget\n";
- }
- } else {
- print $client "error: ".($!+0)
- ." tie(GDBM) Failed ".
- "while attempting idget\n";
- }
+ } elsif ($userinput =~ /^idget/) {
+ if(isClient) {
+ my ($cmd,$udom,$what)=split(/:/,$userinput);
+ chomp($what);
+ $udom=~s/\W//g;
+ my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
+ my @queries=split(/\&/,$what);
+ my $qresult='';
+ my %hash;
+ if (tie(%hash,'GDBM_File',"$proname.db",&GDBM_READER(),0640)) {
+ for (my $i=0;$i<=$#queries;$i++) {
+ $qresult.="$hash{$queries[$i]}&";
+ }
+ if (untie(%hash)) {
+ $qresult=~s/\&$//;
+ print $client "$qresult\n";
+ } else {
+ print $client "error: ".($!+0)
+ ." untie(GDBM) Failed ".
+ "while attempting idget\n";
+ }
+ } else {
+ print $client "error: ".($!+0)
+ ." tie(GDBM) Failed ".
+ "while attempting idget\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# ---------------------------------------------------------------------- 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 $client "error: ".($!+0)
- ."IO::File->new Failed ".
- "while attempting tmpput\n";
- }
-
+ } elsif ($userinput =~ /^tmpput/) {
+ if(isClient) {
+ my ($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 $client "error: ".($!+0)
+ ."IO::File->new Failed ".
+ "while attempting tmpput\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
+
# ---------------------------------------------------------------------- tmpget
- } elsif ($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 $client "error: ".($!+0)
- ."IO::File->new Failed ".
- "while attempting tmpget\n";
- }
-
+ } elsif ($userinput =~ /^tmpget/) {
+ if(isClient) {
+ my ($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 $client "error: ".($!+0)
+ ."IO::File->new Failed ".
+ "while attempting tmpget\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# ---------------------------------------------------------------------- tmpdel
- } elsif ($userinput =~ /^tmpdel/) {
- my ($cmd,$id)=split(/:/,$userinput);
- chomp($id);
- $id=~s/\W/\_/g;
- my $execdir=$perlvar{'lonDaemons'};
- if (unlink("$execdir/tmp/$id.tmp")) {
- print $client "ok\n";
- } else {
- print $client "error: ".($!+0)
- ."Unlink tmp Failed ".
- "while attempting tmpdel\n";
- }
+ } elsif ($userinput =~ /^tmpdel/) {
+ if(isClient) {
+ my ($cmd,$id)=split(/:/,$userinput);
+ chomp($id);
+ $id=~s/\W/\_/g;
+ my $execdir=$perlvar{'lonDaemons'};
+ if (unlink("$execdir/tmp/$id.tmp")) {
+ print $client "ok\n";
+ } else {
+ print $client "error: ".($!+0)
+ ."Unlink tmp Failed ".
+ "while attempting tmpdel\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# -------------------------------------------------------------------------- ls
- } elsif ($userinput =~ /^ls/) {
- my ($cmd,$ulsdir)=split(/:/,$userinput);
- 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'; }
- print $client "$ulsout\n";
+ } elsif ($userinput =~ /^ls/) {
+ if(isClient) {
+ my $obs;
+ my $rights;
+ my ($cmd,$ulsdir)=split(/:/,$userinput);
+ my $ulsout='';
+ my $ulsfn;
+ if (-e $ulsdir) {
+ if(-d $ulsdir) {
+ if (opendir(LSDIR,$ulsdir)) {
+ while ($ulsfn=readdir(LSDIR)) {
+ undef $obs, $rights;
+ my @ulsstats=stat($ulsdir.'/'.$ulsfn);
+ #We do some obsolete checking here
+ if(-e $ulsdir.'/'.$ulsfn.".meta") {
+ open(FILE, $ulsdir.'/'.$ulsfn.".meta");
+ my @obsolete=<FILE>;
+ foreach my $obsolete (@obsolete) {
+ if($obsolete =~ m|(<obsolete>)(on)|) { $obs = 1; }
+ if($obsolete =~ m|(<copyright>)(default)|) { $rights = 1; }
+ }
+ }
+ $ulsout.=$ulsfn.'&'.join('&',@ulsstats);
+ if($obs eq '1') { $ulsout.="&1"; }
+ else { $ulsout.="&0"; }
+ if($rights eq '1') { $ulsout.="&1:"; }
+ else { $ulsout.="&0:"; }
+ }
+ closedir(LSDIR);
+ }
+ } else {
+ my @ulsstats=stat($ulsdir);
+ $ulsout.=$ulsfn.'&'.join('&',@ulsstats).':';
+ }
+ } else {
+ $ulsout='no_such_dir';
+ }
+ if ($ulsout eq '') { $ulsout='empty'; }
+ print $client "$ulsout\n";
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# ----------------------------------------------------------------- setannounce
- } elsif ($userinput =~ /^setannounce/) {
- my ($cmd,$announcement)=split(/:/,$userinput);
- chomp($announcement);
- $announcement=&unescape($announcement);
- if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
- '/announcement.txt')) {
- print $store $announcement;
- close $store;
- print $client "ok\n";
- } else {
- print $client "error: ".($!+0)."\n";
- }
+ } elsif ($userinput =~ /^setannounce/) {
+ if (isClient) {
+ my ($cmd,$announcement)=split(/:/,$userinput);
+ chomp($announcement);
+ $announcement=&unescape($announcement);
+ if (my $store=IO::File->new('>'.$perlvar{'lonDocRoot'}.
+ '/announcement.txt')) {
+ print $store $announcement;
+ close $store;
+ print $client "ok\n";
+ } else {
+ print $client "error: ".($!+0)."\n";
+ }
+ } else {
+ Reply($client, "refused\n", $userinput);
+
+ }
# ------------------------------------------------------------------ Hanging up
- } elsif (($userinput =~ /^exit/) ||
- ($userinput =~ /^init/)) {
- &logthis(
- "Client $clientip ($hostid{$clientip}) hanging up: $userinput");
- print $client "bye\n";
- $client->close();
- last;
+ } elsif (($userinput =~ /^exit/) ||
+ ($userinput =~ /^init/)) { # no restrictions.
+ &logthis(
+ "Client $clientip ($clientname) hanging up: $userinput");
+ print $client "bye\n";
+ $client->shutdown(2); # shutdown the socket forcibly.
+ $client->close();
+ last;
+
+# ---------------------------------- set current host/domain
+ } elsif ($userinput =~ /^sethost:/) {
+ if (isClient) {
+ print $client &sethost($userinput)."\n";
+ } else {
+ print $client "refused\n";
+ }
+#---------------------------------- request file (?) version.
+ } elsif ($userinput =~/^version:/) {
+ if (isClient) {
+ print $client &version($userinput)."\n";
+ } else {
+ print $client "refused\n";
+ }
+#------------------------------- is auto-enrollment enabled?
+ } elsif ($userinput =~/^autorun:/) {
+ if (isClient) {
+ my ($cmd,$cdom) = split(/:/,$userinput);
+ my $outcome = &localenroll::run($cdom);
+ print $client "$outcome\n";
+ } else {
+ print $client "0\n";
+ }
+#------------------------------- get official sections (for auto-enrollment).
+ } elsif ($userinput =~/^autogetsections:/) {
+ if (isClient) {
+ my ($cmd,$coursecode,$cdom)=split(/:/,$userinput);
+ my @secs = &localenroll::get_sections($coursecode,$cdom);
+ my $seclist = &escape(join(':',@secs));
+ print $client "$seclist\n";
+ } else {
+ print $client "refused\n";
+ }
+#----------------------- validate owner of new course section (for auto-enrollment).
+ } elsif ($userinput =~/^autonewcourse:/) {
+ if (isClient) {
+ my ($cmd,$inst_course_id,$owner,$cdom)=split(/:/,$userinput);
+ my $outcome = &localenroll::new_course($inst_course_id,$owner,$cdom);
+ print $client "$outcome\n";
+ } else {
+ print $client "refused\n";
+ }
+#-------------- validate course section in schedule of classes (for auto-enrollment).
+ } elsif ($userinput =~/^autovalidatecourse:/) {
+ if (isClient) {
+ my ($cmd,$inst_course_id,$cdom)=split(/:/,$userinput);
+ my $outcome=&localenroll::validate_courseID($inst_course_id,$cdom);
+ print $client "$outcome\n";
+ } else {
+ print $client "refused\n";
+ }
+#--------------------------- create password for new user (for auto-enrollment).
+ } elsif ($userinput =~/^autocreatepassword:/) {
+ if (isClient) {
+ my ($cmd,$authparam,$cdom)=split(/:/,$userinput);
+ my ($create_passwd,$authchk);
+ ($authparam,$create_passwd,$authchk) = &localenroll::create_password($authparam,$cdom);
+ print $client &escape($authparam.':'.$create_passwd.':'.$authchk)."\n";
+ } else {
+ print $client "refused\n";
+ }
+#--------------------------- read and remove temporary files (for auto-enrollment).
+ } elsif ($userinput =~/^autoretrieve:/) {
+ if (isClient) {
+ my ($cmd,$filename) = split(/:/,$userinput);
+ my $source = $perlvar{'lonDaemons'}.'/tmp/'.$filename;
+ if ( (-e $source) && ($filename ne '') ) {
+ my $reply = '';
+ if (open(my $fh,$source)) {
+ while (<$fh>) {
+ chomp($_);
+ $_ =~ s/^\s+//g;
+ $_ =~ s/\s+$//g;
+ $reply .= $_;
+ }
+ close($fh);
+ print $client &escape($reply)."\n";
+# unlink($source);
+ } else {
+ print $client "error\n";
+ }
+ } else {
+ print $client "error\n";
+ }
+ } else {
+ print $client "refused\n";
+ }
# ------------------------------------------------------------- unknown command
- } elsif ($userinput =~ /^sethost:/) {
- print $client &sethost($userinput)."\n";
- } elsif ($userinput =~/^version:/) {
- print $client &version($userinput)."\n";
- } else {
- # unknown command
- print $client "unknown_cmd\n";
- }
+
+ } else {
+ # unknown command
+ print $client "unknown_cmd\n";
+ }
# -------------------------------------------------------------------- complete
- alarm(0);
- &status('Listening to '.$hostid{$clientip});
- }
+ alarm(0);
+ &status('Listening to '.$clientname." ($keymode)");
+ }
# --------------------------------------------- client unknown or fishy, refuse
- } else {
- print $client "refused\n";
- $client->close();
- &logthis("<font color=blue>WARNING: "
- ."Rejected client $clientip, closing connection</font>");
- }
- }
-
+ } else {
+ print $client "refused\n";
+ $client->close();
+ &logthis("<font color='blue'>WARNING: "
+ ."Rejected client $clientip, closing connection</font>");
+ }
+ }
+
# =============================================================================
-
- &logthis("<font color=red>CRITICAL: "
- ."Disconnect from $clientip ($hostid{$clientip})</font>");
-
-
- # this exit is VERY important, otherwise the child will become
- # a producer of more and more children, forking yourself into
- # process death.
- exit;
+
+ &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;
}
@@ -1803,13 +3238,10 @@ sub make_new_child {
#
sub ManagePermissions
{
- my $request = shift;
- my $domain = shift;
- my $user = shift;
- my $authtype= shift;
+
+ my ($request, $domain, $user, $authtype) = @_;
# See if the request is of the form /$domain/_au
- &logthis("ruequest is $request");
if($request =~ /^(\/$domain\/_au)$/) { # It's an author rolesput...
my $execdir = $perlvar{'lonDaemons'};
my $userhome= "/home/$user" ;
@@ -1824,8 +3256,8 @@ sub ManagePermissions
#
sub GetAuthType
{
- my $domain = shift;
- my $user = shift;
+
+ my ($domain, $user) = @_;
Debug("GetAuthType( $domain, $user ) \n");
my $proname = &propath($domain, $user);
@@ -1900,10 +3332,10 @@ sub chatadd {
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 $time=time;
my ($lastid)=($entries[$#entries]=~/^(\w+)\:/);
my ($thentime,$idnum)=split(/\_/,$lastid);
my $newid=$time.'_000000';
@@ -1923,22 +3355,47 @@ sub chatadd {
}
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.$hostid{$clientip}")) {
- $result="ok\n";
- } else {
- $result="not_subscribed\n";
- }
+ my $unsubs = 0; # Number of successful unsubscribes:
+
+
+ # An old way subscriptions were handled was to have a
+ # subscription marker file:
+
+ Debug("Attempting unlink of $fname.$clientname");
+ if (unlink("$fname.$clientname")) {
+ $unsubs++; # Successful unsub via marker file.
+ }
+
+ # The more modern way to do it is to have a subscription list
+ # file:
+
if (-e "$fname.subscription") {
- my $found=&addline($fname,$hostid{$clientip},$clientip,'');
- if ($found) { $result="ok\n"; }
+ my $found=&addline($fname,$clientname,$clientip,'');
+ if ($found) {
+ $unsubs++;
+ }
+ }
+
+ # If either or both of these mechanisms succeeded in unsubscribing a
+ # resource we can return ok:
+
+ if($unsubs) {
+ $result = "ok\n";
} else {
- if ($result != "ok\n") { $result="not_subscribed\n"; }
+ $result = "not_subscribed\n";
}
+
return $result;
}
@@ -1966,7 +3423,7 @@ sub currentversion {
# 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 ($thisfile=~/\Q$fnamere1\E(\d+)\Q$fnamere2\E$/) {
if ($1>$version) { $version=$1; }
}
}
@@ -2014,10 +3471,10 @@ sub subscribe {
if (-d $fname) {
$result="directory\n";
} else {
- if (-e "$fname.$hostid{$clientip}") {&unsub($fname,$clientip);}
+ if (-e "$fname.$clientname") {&unsub($fname,$clientip);}
my $now=time;
- my $found=&addline($fname,$hostid{$clientip},$clientip,
- "$hostid{$clientip}:$clientip:$now\n");
+ 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
@@ -2060,6 +3517,16 @@ sub make_passwd_file {
}
} 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 to create privilged account blocked");
+ return "no_priv_account_error\n";
+ }
+
my $execpath="$perlvar{'lonDaemons'}/"."lcuseradd";
{
&Debug("Executing external: ".$execpath);
@@ -2092,7 +3559,7 @@ sub sethost {
my (undef,$hostid)=split(/:/,$remotereq);
if (!defined($hostid)) { $hostid=$perlvar{'lonHostID'}; }
if ($hostip{$perlvar{'lonHostID'}} eq $hostip{$hostid}) {
- $currenthostid=$hostid;
+ $currenthostid =$hostid;
$currentdomainid=$hostdom{$hostid};
&logthis("Setting hostid to $hostid, and domain to $currentdomainid");
} else {
@@ -2118,8 +3585,8 @@ sub userload {
my $curtime=time;
while ($filename=readdir(LONIDS)) {
if ($filename eq '.' || $filename eq '..') {next;}
- my ($atime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[8];
- if ($curtime-$atime < 3600) { $numusers++; }
+ my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
+ if ($curtime-$mtime < 1800) { $numusers++; }
}
closedir(LONIDS);
}
@@ -2132,6 +3599,7 @@ sub userload {
return $userloadpercent;
}
+
# ----------------------------------- POD (plain old documentation, CPAN style)
=head1 NAME
@@ -2241,6 +3709,17 @@ each connection is logged.
=item *
+SIGUSR2
+
+Parent Signal assignment:
+ $SIG{USR2} = \&UpdateHosts
+
+Child signal assignment:
+ NONE
+
+
+=item *
+
SIGCHLD
Parent signal assignment: