Diff for /loncom/loncnew between versions 1.39 and 1.40

version 1.39, 2004/01/13 09:57:18 version 1.40, 2004/02/09 10:58:03
Line 63  use LONCAPA::Configuration; Line 63  use LONCAPA::Configuration;
 use LONCAPA::HashIterator;  use LONCAPA::HashIterator;
   
   
 #  
 #   Disable all signals we might receive from outside for now.  
 #  
   
   
 # Read the httpd configuration file to get perl variables  # Read the httpd configuration file to get perl variables
 # normally set in apache modules:  # normally set in apache modules:
   
Line 107  my $Status          = ""; # Current stat Line 102  my $Status          = ""; # Current stat
 my $RecentLogEntry  = "";  my $RecentLogEntry  = "";
 my $ConnectionRetries=2; # Number of connection retries allowed.  my $ConnectionRetries=2; # Number of connection retries allowed.
 my $ConnectionRetriesLeft=2; # Number of connection retries remaining.  my $ConnectionRetriesLeft=2; # Number of connection retries remaining.
   my $LondVersion     = "unknown"; # Version of lond we talk with.
   
 #  #
 #   The hash below gives the HTML format for log messages  #   The hash below gives the HTML format for log messages
Line 695  The connection must echo the challenge b Line 691  The connection must echo the challenge b
 The challenge has been replied to.  The we are receiveing the   The challenge has been replied to.  The we are receiveing the 
 'ok' from the partner.  'ok' from the partner.
   
   =head3  State=ReadingVersionString
   
   We have requested the lond version and are reading the
   version back.  Upon completion, we'll store the version away
   for future use(?).
   
   =head3 State=HostSet
   
   We have selected the domain name of our peer (multhomed hosts)
   and are getting the reply (presumably ok) back.
   
 =head3 State=RequestingKey  =head3 State=RequestingKey
   
 The ok has been received and we need to send the request for  The ok has been received and we need to send the request for
Line 733  transaction is in progress, the socket a Line 740  transaction is in progress, the socket a
   
 sub LondReadable {  sub LondReadable {
   
     my $Event      = shift;     my $Event      = shift;
     my $Watcher    = $Event->w;     my $Watcher    = $Event->w;
     my $Socket     = $Watcher->data;     my $Socket     = $Watcher->data;
     my $client     = undef;     my $client     = undef;
   
     &Debug(6,"LondReadable called state = ".$Socket->GetState());     &Debug(6,"LondReadable called state = ".$Socket->GetState());
   
   
     my $State = $Socket->GetState(); # All action depends on the state.     my $State = $Socket->GetState(); # All action depends on the state.
   
     SocketDump(6, $Socket);     SocketDump(6, $Socket);
     my $status = $Socket->Readable();     my $status = $Socket->Readable();
   
      &Debug(2, "Socket->Readable returned: $status");
   
      if($status != 0) {
         # bad return from socket read. Currently this means that
         # The socket has become disconnected. We fail the transaction.
   
         Log("WARNING",
            "Lond connection lost.");
         if(exists($ActiveTransactions{$Socket})) {
            FailTransaction($ActiveTransactions{$Socket});
         }
         $Watcher->cancel();
         KillSocket($Socket);
         $ConnectionRetriesLeft--;       # Counts as connection failure
         return;
      }
      SocketDump(6,$Socket);
   
     &Debug(2, "Socket->Readable returned: $status");     $State = $Socket->GetState(); # Update in case of transition.
      &Debug(6, "After read, state is ".$State);
     if($status != 0) {  
  # bad return from socket read. Currently this means that  
  # The socket has become disconnected. We fail the transaction.  
   
  Log("WARNING",  
     "Lond connection lost.");  
  if(exists($ActiveTransactions{$Socket})) {  
     FailTransaction($ActiveTransactions{$Socket});  
  }  
  $Watcher->cancel();  
  KillSocket($Socket);  
  $ConnectionRetriesLeft--;       # Counts as connection failure  
  return;  
     }  
     SocketDump(6,$Socket);  
   
     $State = $Socket->GetState(); # Update in case of transition.  
     &Debug(6, "After read, state is ".$State);  
   
    if($State eq "Initialized") {     if($State eq "Initialized") {
   
   
     } elsif ($State eq "ChallengeReceived") {     } elsif ($State eq "ChallengeReceived") {
  #  The challenge must be echoed back;  The state machine   #  The challenge must be echoed back;  The state machine
  # in the connection takes care of setting that up.  Just   # in the connection takes care of setting that up.  Just
  # need to transition to writable:   # need to transition to writable:
   
  $Watcher->cb(\&LondWritable);        $Watcher->cb(\&LondWritable);
  $Watcher->poll("w");        $Watcher->poll("w");
   
     } elsif ($State eq "ChallengeReplied") {  
   
      } elsif ($State eq "ChallengeReplied") {
   
     } elsif ($State eq "RequestingKey") {     } elsif ($State eq "RequestingVersion") {
         # Need to ask for the version... that is writiability:
         
         $Watcher->cb(\&LondWritable);
         $Watcher->poll("w");
         
      } elsif ($State eq "ReadingVersionString") {
         # Read the rest of the version string... 
      } elsif ($State eq "SetHost") {
         # Need to request the actual domain get set...
         
         $Watcher->cb(\&LondWritable);
         $Watcher->poll("w");
      } elsif ($State eq "HostSet") {
         # Reading the 'ok' from the peer.
         
      } elsif ($State eq "RequestingKey") {
  #  The ok was received.  Now we need to request the key   #  The ok was received.  Now we need to request the key
  #  That requires us to be writable:   #  That requires us to be writable:
   
  $Watcher->cb(\&LondWritable);        $Watcher->cb(\&LondWritable);
  $Watcher->poll("w");        $Watcher->poll("w");
   
     } elsif ($State eq "ReceivingKey") {     } elsif ($State eq "ReceivingKey") {
   
     } elsif ($State eq "Idle") {     } elsif ($State eq "Idle") {
      
      # This is as good a spot as any to get the peer version
      # string:
      
      if($LondVersion eq "unknown") {
         $LondVersion = $Socket->PeerVersion();
         Log("INFO", "Connected to lond version: $LondVersion");
      }
  # If necessary, complete a transaction and then go into the   # If necessary, complete a transaction and then go into the
  # idle queue.   # idle queue.
  #  Note that a trasition to idle indicates a live lond   #  Note that a trasition to idle indicates a live lond
  # on the other end so reset the connection retries.   # on the other end so reset the connection retries.
  #   #
  $ConnectionRetriesLeft = $ConnectionRetries; # success resets the count        $ConnectionRetriesLeft = $ConnectionRetries; # success resets the count
  $Watcher->cancel();        $Watcher->cancel();
  if(exists($ActiveTransactions{$Socket})) {        if(exists($ActiveTransactions{$Socket})) {
     Debug(5,"Completing transaction!!");           Debug(5,"Completing transaction!!");
     CompleteTransaction($Socket,            CompleteTransaction($Socket, 
  $ActiveTransactions{$Socket});                               $ActiveTransactions{$Socket});
  } else {        } else {
     Log("SUCCESS", "Connection ".$ConnectionCount." to "           Log("SUCCESS", "Connection ".$ConnectionCount." to "
  .$RemoteHost." now ready for action");              .$RemoteHost." now ready for action");
  }        }
  ServerToIdle($Socket); # Next work unit or idle.        ServerToIdle($Socket); # Next work unit or idle.
   
     } elsif ($State eq "SendingRequest") {     } elsif ($State eq "SendingRequest") {
  #  We need to be writable for this and probably don't belong   #  We need to be writable for this and probably don't belong
  #  here inthe first place.   #  here inthe first place.
   
  Deubg(6, "SendingRequest state encountered in readable");        Deubg(6, "SendingRequest state encountered in readable");
  $Watcher->poll("w");        $Watcher->poll("w");
  $Watcher->cb(\&LondWritable);        $Watcher->cb(\&LondWritable);
   
     } elsif ($State eq "ReceivingReply") {     } elsif ($State eq "ReceivingReply") {
   
   
     } else {     } else {
  # Invalid state.   # Invalid state.
  Debug(4, "Invalid state in LondReadable");        Debug(4, "Invalid state in LondReadable");
     }     }
 }  }
   
 =pod  =pod
Line 902  sub LondWritable { Line 932  sub LondWritable {
   
     SocketDump(6,$Socket);      SocketDump(6,$Socket);
   
     if      ($State eq "Connected")         {     if      ($State eq "Connected")         {
   
  if ($Socket->Writable() != 0) {  
     #  The write resulted in an error.  
     # We'll treat this as if the socket got disconnected:  
     Log("WARNING", "Connection to ".$RemoteHost.  
  " has been disconnected");  
     FailTransaction($ActiveTransactions{$Socket});  
     $Watcher->cancel();  
     KillSocket($Socket);  
     return;  
  }  
  #  "init" is being sent...  
   
         if ($Socket->Writable() != 0) {
     } elsif ($State eq "Initialized")       {           #  The write resulted in an error.
            # We'll treat this as if the socket got disconnected:
            Log("WARNING", "Connection to ".$RemoteHost.
                           " has been disconnected");
            FailTransaction($ActiveTransactions{$Socket});
            $Watcher->cancel();
            KillSocket($Socket);
            return;
         }
         
      #  "init" is being sent...
      
      } elsif ($State eq "Initialized")       {
   
  # Now that init was sent, we switch         # Now that init was sent, we switch 
  # to watching for readability:        # to watching for readability:
   
  $Watcher->cb(\&LondReadable);        $Watcher->cb(\&LondReadable);
  $Watcher->poll("r");        $Watcher->poll("r");
   
     } elsif ($State eq "ChallengeReceived") {     } elsif ($State eq "ChallengeReceived") {
  # We received the challenge, now we         # We received the challenge, now we 
  # are echoing it back. This is a no-op,        # are echoing it back. This is a no-op,
  # we're waiting for the state to change        # we're waiting for the state to change
   
  if($Socket->Writable() != 0) {        if($Socket->Writable() != 0) {
   
     $Watcher->cancel();           $Watcher->cancel();
     KillSocket($Socket);           KillSocket($Socket);
     return;           return;
  }        }
   
     } elsif ($State eq "ChallengeReplied")  {     } elsif ($State eq "ChallengeReplied")  {
  # The echo was sent back, so we switch        # The echo was sent back, so we switch
  # to watching readability.        # to watching readability.
   
  $Watcher->cb(\&LondReadable);        $Watcher->cb(\&LondReadable);
  $Watcher->poll("r");        $Watcher->poll("r");
      } elsif ($State eq "RequestingVersion") {
     } elsif ($State eq "RequestingKey")     {        # Sending the peer a version request...
  # At this time we're requesting the key.        
  # again, this is essentially a no-op.        if($Socket->Writable() != 0) {
  # we'll write the next chunk until the           $Watcher->cancel();
  # state changes.           KillSocket($Socket);
            return;
  if($Socket->Writable() != 0) {        }
     # Write resulted in an error.     } elsif ($State eq "ReadingVersionString") {
         # Transition to read since we have sent the
         # version command and now just need to read the
         # version string from the peer:
         
         $Watcher->cb(\&LondReadable);
         $Watcher->poll("r");
         
      } elsif ($State eq "SetHost") {
         #  Setting the remote domain...
         
         if($Socket->Writable() != 0) {
            $Watcher->cancel();
            KillSocket($Socket);
            return;
         }
      } elsif ($State eq "HostSet") {
         # Back to readable to get the ok.
         
         $Watcher->cb(\&LondReadable);
         $Watcher->poll("r");
         
   
      } elsif ($State eq "RequestingKey")     {
         # At this time we're requesting the key.
         # again, this is essentially a no-op.
         # we'll write the next chunk until the
         # state changes.
   
         if($Socket->Writable() != 0) {
            # Write resulted in an error.
   
            $Watcher->cancel();
            KillSocket($Socket);
            return;
   
         }
      } elsif ($State eq "ReceivingKey")      {
         # Now we need to wait for the key
         # to come back from the peer:
   
     $Watcher->cancel();        $Watcher->cb(\&LondReadable);
     KillSocket($Socket);        $Watcher->poll("r");
     return;  
   
  }  
     } elsif ($State eq "ReceivingKey")      {  
  # Now we need to wait for the key  
  # to come back from the peer:  
   
  $Watcher->cb(\&LondReadable);     } elsif ($State eq "SendingRequest")    {
  $Watcher->poll("r");   
      # At this time we are sending a request to the
     } elsif ($State eq "SendingRequest")    {  
  # At this time we are sending a request to the  
  # peer... write the next chunk:   # peer... write the next chunk:
   
  if($Socket->Writable() != 0) {        if($Socket->Writable() != 0) {
   
     if(exists($ActiveTransactions{$Socket})) {           if(exists($ActiveTransactions{$Socket})) {
  Debug(3, "Lond connection lost, failing transactions");              Debug(3, "Lond connection lost, failing transactions");
  FailTransaction($ActiveTransactions{$Socket});              FailTransaction($ActiveTransactions{$Socket});
     }           }
     $Watcher->cancel();        $Watcher->cancel();
     KillSocket($Socket);           KillSocket($Socket);
     return;           return;
           
  }        }
   
     } elsif ($State eq "ReceivingReply")    {     } elsif ($State eq "ReceivingReply")    {
  # The send has completed.  Wait for the        # The send has completed.  Wait for the
  # data to come in for a reply.        # data to come in for a reply.
  Debug(8,"Writable sent request/receiving reply");        Debug(8,"Writable sent request/receiving reply");
  $Watcher->cb(\&LondReadable);        $Watcher->cb(\&LondReadable);
  $Watcher->poll("r");        $Watcher->poll("r");
   
      } else {
         #  Control only passes here on an error: 
         #  the socket state does not match any
         #  of the known states... so an error
         #  must be logged.
   
     } else {        &Debug(4, "Invalid socket state ".$State."\n");
  #  Control only passes here on an error:      }
  #  the socket state does not match any  
  #  of the known states... so an error  
  #  must be logged.  
   
  &Debug(4, "Invalid socket state ".$State."\n");  
     }  
           
 }  }
 =pod  =pod

Removed from v.1.39  
changed lines
  Added in v.1.40


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