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Diff for /loncom/lond between versions 1.134 and 1.140

version 1.134, 2003/08/12 03:28:31 version 1.140, 2003/08/26 11:15:57
Line 50 Line 50
 #      population).  Since the time averaged connection rate is close to zero  #      population).  Since the time averaged connection rate is close to zero
 #      because lonc's purpose is to maintain near continuous connnections,  #      because lonc's purpose is to maintain near continuous connnections,
 #      preforking is not really needed.  #      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 strict;
Line 80  my $currenthostid; Line 87  my $currenthostid;
 my $currentdomainid;  my $currentdomainid;
   
 my $client;  my $client;
   my $clientip;
   
 my $server;  my $server;
 my $thisserver;  my $thisserver;
   
Line 126  my @adderrors    = ("ok", Line 135  my @adderrors    = ("ok",
   
   
 #  #
   #   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;
   }
   
   
   #
   #  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; 
   
       my $hostentry   = $hostid{$certificate};
       if ($hostentry ne undef) {
    &logthis('<font color="yellow">Authenticating manager'.
    " $hostentry</font>");
    return 1;
       } else {
    &logthis('<font color="red"> Failed manager authentication '.
    "$certificate </font>");
       }
   }
   #
 #  Convert an error return code from lcpasswd to a string value.  #  Convert an error return code from lcpasswd to a string value.
 #  #
 sub lcpasswdstrerror {  sub lcpasswdstrerror {
Line 527  sub make_new_child { Line 574  sub make_new_child {
     sigprocmask(SIG_BLOCK, $sigset)      sigprocmask(SIG_BLOCK, $sigset)
         or die "Can't block SIGINT for fork: $!\n";          or die "Can't block SIGINT for fork: $!\n";
   
     my $clientip;  
     die "fork: $!" unless defined ($pid = fork);      die "fork: $!" unless defined ($pid = fork);
           
     if ($pid) {      if ($pid) {
Line 645  sub make_new_child { Line 691  sub make_new_child {
    if ($userinput =~ /^ping/) {     if ($userinput =~ /^ping/) {
                        print $client "$currenthostid\n";                         print $client "$currenthostid\n";
 # ------------------------------------------------------------------------ pong  # ------------------------------------------------------------------------ pong
    } elsif ($userinput =~ /^pong/) {     }elsif ($userinput =~ /^pong/) {
                        my $reply=&reply("ping",$hostid{$clientip});                         my $reply=&reply("ping",$hostid{$clientip});
                        print $client "$currenthostid:$reply\n";                          print $client "$currenthostid:$reply\n"; 
 # ------------------------------------------------------------------------ ekey  # ------------------------------------------------------------------------ ekey
Line 676  sub make_new_child { Line 722  sub make_new_child {
    } elsif ($userinput =~ /^userload/) {     } elsif ($userinput =~ /^userload/) {
        my $userloadpercent=&userload();         my $userloadpercent=&userload();
        print $client "$userloadpercent\n";         print $client "$userloadpercent\n";
   
   #
   #        Transactions requiring encryption:
   #
 # ----------------------------------------------------------------- currentauth  # ----------------------------------------------------------------- currentauth
    } elsif ($userinput =~ /^currentauth/) {     } elsif ($userinput =~ /^currentauth/) {
      if ($wasenc==1) {       if ($wasenc==1) {
Line 690  sub make_new_child { Line 740  sub make_new_child {
      } else {       } else {
        print $client "refused\n";         print $client "refused\n";
      }       }
   #--------------------------------------------------------------------- pushfile
      } elsif($userinput =~ /^pushfile/) { 
          if($wasenc == 1) {
      my $cert = GetCertificate($userinput);
      if(ValidManager($cert)) {
          print $client "ok\n";
      } else {
          print $client "refused\n";
      } 
          } else {
      print $client "refused\n";
          }
   #--------------------------------------------------------------------- reinit
      } elsif($userinput =~ /^reinit/) {
          if ($wasenc == 1) {
      my $cert = GetCertificate($userinput);
      if(ValidManager($cert)) {
          print $client "ok\n";
      } else {
          print $client "refused\n";
      }
          } else {
      print $client "refused\n";
          }
 # ------------------------------------------------------------------------ auth  # ------------------------------------------------------------------------ auth
                    } elsif ($userinput =~ /^auth/) {                     } elsif ($userinput =~ /^auth/) {
      if ($wasenc==1) {       if ($wasenc==1) {
Line 801  sub make_new_child { Line 875  sub make_new_child {
      my $salt=time;       my $salt=time;
                              $salt=substr($salt,6,2);                               $salt=substr($salt,6,2);
      my $ncpass=crypt($npass,$salt);       my $ncpass=crypt($npass,$salt);
                              { my $pf = IO::File->new(">$passfilename");                               {
           print $pf "internal:$ncpass\n"; }                my $pf;
      &logthis("Result of password change for $uname: pwchange_success");   if ($pf = IO::File->new(">$passfilename")) {
                              print $client "ok\n";       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 {                             } else {
                              print $client "non_authorized\n";                               print $client "non_authorized\n";
                            }                             }
Line 1726  sub make_new_child { Line 1808  sub make_new_child {
                        }                         }
                        if ($ulsout eq '') { $ulsout='empty'; }                         if ($ulsout eq '') { $ulsout='empty'; }
                        print $client "$ulsout\n";                         print $client "$ulsout\n";
   # ----------------------------------------------------------------- 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";
          }
 # ------------------------------------------------------------------ Hanging up  # ------------------------------------------------------------------ Hanging up
                    } elsif (($userinput =~ /^exit/) ||                     } elsif (($userinput =~ /^exit/) ||
                             ($userinput =~ /^init/)) {                              ($userinput =~ /^init/)) {
Line 2098  sub userload { Line 2193  sub userload {
  my $curtime=time;   my $curtime=time;
  while ($filename=readdir(LONIDS)) {   while ($filename=readdir(LONIDS)) {
     if ($filename eq '.' || $filename eq '..') {next;}      if ($filename eq '.' || $filename eq '..') {next;}
     my ($atime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[8];      my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
     if ($curtime-$atime < 3600) { $numusers++; }      if ($curtime-$mtime < 3600) { $numusers++; }
  }   }
  closedir(LONIDS);   closedir(LONIDS);
     }      }
Line 2381  Send along temporarily stored informatio Line 2476  Send along temporarily stored informatio
   
 List part of a user's directory.  List part of a user's directory.
   
   =item pushtable
   
   Pushes a file in /home/httpd/lonTab directory.  Currently limited to:
   hosts.tab and domain.tab. The old file is copied to  *.tab.backup but
   must be restored manually in case of a problem with the new table file.
   pushtable requires that the request be encrypted and validated via
   ValidateManager.  The form of the command is:
   enc:pushtable tablename <tablecontents> \n
   where pushtable, tablename and <tablecontents> will be encrypted, but \n is a 
   cleartext newline.
   
 =item Hanging up (exit or init)  =item Hanging up (exit or init)
   
 What to do when a client tells the server that they (the client)  What to do when a client tells the server that they (the client)
Line 2391  are leaving the network. Line 2497  are leaving the network.
 If B<lond> is sent an unknown command (not in the list above),  If B<lond> is sent an unknown command (not in the list above),
 it replys to the client "unknown_cmd".  it replys to the client "unknown_cmd".
   
   
 =item UNKNOWN CLIENT  =item UNKNOWN CLIENT
   
 If the anti-spoofing algorithm cannot verify the client,  If the anti-spoofing algorithm cannot verify the client,
Removed from v.1.134  
changed lines
  Added in v.1.140

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