Exemplo n.º 1
0
  public void handleEvent(final ConnectedMessageChannel channel) {
    int res;
    SaslWrapper saslWrapper = connection.getSaslWrapper();
    try {
      Pooled<ByteBuffer> pooled = connection.allocate();
      ByteBuffer buffer = pooled.getResource();
      try {
        for (; ; )
          try {
            res = channel.receive(buffer);
            if (res == -1) {
              log.trace("Received connection end-of-stream");
              try {
                channel.shutdownReads();
              } finally {
                handler.handleConnectionClose();
              }
              return;
            } else if (res == 0) {
              log.trace("No message ready; returning");
              return;
            }
            buffer.flip();
            if (saslWrapper != null) {
              final ByteBuffer source = buffer.duplicate();
              buffer.clear();
              saslWrapper.unwrap(buffer, source);
              buffer.flip();
            }
            final byte protoId = buffer.get();
            try {
              switch (protoId) {
                case Protocol.CONNECTION_ALIVE:
                  {
                    log.trace("Received connection alive");
                    connection.sendAliveResponse();
                    return;
                  }
                case Protocol.CONNECTION_ALIVE_ACK:
                  {
                    log.trace("Received connection alive ack");
                    return;
                  }
                case Protocol.CONNECTION_CLOSE:
                  {
                    log.trace("Received connection close request");
                    handler.receiveCloseRequest();
                    return;
                  }
                case Protocol.CHANNEL_OPEN_REQUEST:
                  {
                    log.trace("Received channel open request");
                    int channelId = buffer.getInt() ^ 0x80000000;
                    int inboundWindow = Integer.MAX_VALUE;
                    int inboundMessages = 0xffff;
                    int outboundWindow = Integer.MAX_VALUE;
                    int outboundMessages = 0xffff;
                    long inboundMessageSize = Long.MAX_VALUE;
                    long outboundMessageSize = Long.MAX_VALUE;
                    // parse out request
                    int b;
                    String serviceType = null;
                    OUT:
                    for (; ; ) {
                      b = buffer.get() & 0xff;
                      switch (b) {
                        case Protocol.O_END:
                          break OUT;
                        case Protocol.O_SERVICE_NAME:
                          {
                            serviceType = ProtocolUtils.readString(buffer);
                            break;
                          }
                        case Protocol.O_MAX_INBOUND_MSG_WINDOW_SIZE:
                          {
                            outboundWindow =
                                Math.min(outboundWindow, ProtocolUtils.readInt(buffer));
                            break;
                          }
                        case Protocol.O_MAX_INBOUND_MSG_COUNT:
                          {
                            outboundMessages =
                                Math.min(outboundMessages, ProtocolUtils.readUnsignedShort(buffer));
                            break;
                          }
                        case Protocol.O_MAX_OUTBOUND_MSG_WINDOW_SIZE:
                          {
                            inboundWindow = Math.min(inboundWindow, ProtocolUtils.readInt(buffer));
                            break;
                          }
                        case Protocol.O_MAX_OUTBOUND_MSG_COUNT:
                          {
                            inboundMessages =
                                Math.min(inboundMessages, ProtocolUtils.readUnsignedShort(buffer));
                            break;
                          }
                        case Protocol.O_MAX_INBOUND_MSG_SIZE:
                          {
                            outboundMessageSize =
                                Math.min(outboundMessageSize, ProtocolUtils.readLong(buffer));
                            break;
                          }
                        case Protocol.O_MAX_OUTBOUND_MSG_SIZE:
                          {
                            inboundMessageSize =
                                Math.min(inboundMessageSize, ProtocolUtils.readLong(buffer));
                            break;
                          }
                        default:
                          {
                            Buffers.skip(buffer, buffer.get() & 0xff);
                            break;
                          }
                      }
                    }
                    if ((channelId & 0x80000000) != 0) {
                      // invalid channel ID, original should have had MSB=1 and thus the complement
                      // should be MSB=0
                      refuseService(channelId, "Invalid channel ID");
                      break;
                    }

                    if (serviceType == null) {
                      // invalid service reply
                      refuseService(channelId, "Missing service name");
                      break;
                    }

                    final RegisteredService registeredService =
                        handler.getConnectionContext().getRegisteredService(serviceType);
                    if (registeredService == null) {
                      refuseService(channelId, "Unknown service name");
                      break;
                    }
                    final OptionMap serviceOptionMap = registeredService.getOptionMap();
                    outboundWindow =
                        Math.min(
                            outboundWindow,
                            serviceOptionMap.get(
                                RemotingOptions.TRANSMIT_WINDOW_SIZE,
                                Protocol.DEFAULT_WINDOW_SIZE));
                    outboundMessages =
                        Math.min(
                            outboundMessages,
                            serviceOptionMap.get(
                                RemotingOptions.MAX_OUTBOUND_MESSAGES,
                                Protocol.DEFAULT_MESSAGE_COUNT));
                    inboundWindow =
                        Math.min(
                            inboundWindow,
                            serviceOptionMap.get(
                                RemotingOptions.RECEIVE_WINDOW_SIZE, Protocol.DEFAULT_WINDOW_SIZE));
                    inboundMessages =
                        Math.min(
                            inboundMessages,
                            serviceOptionMap.get(
                                RemotingOptions.MAX_INBOUND_MESSAGES,
                                Protocol.DEFAULT_MESSAGE_COUNT));
                    outboundMessageSize =
                        Math.min(
                            outboundMessageSize,
                            serviceOptionMap.get(
                                RemotingOptions.MAX_OUTBOUND_MESSAGE_SIZE, Long.MAX_VALUE));
                    inboundMessageSize =
                        Math.min(
                            inboundMessageSize,
                            serviceOptionMap.get(
                                RemotingOptions.MAX_INBOUND_MESSAGE_SIZE, Long.MAX_VALUE));

                    final OpenListener openListener = registeredService.getOpenListener();
                    if (!handler.handleInboundChannelOpen()) {
                      // refuse
                      refuseService(channelId, "Channel refused");
                      break;
                    }
                    boolean ok1 = false;
                    try {
                      // construct the channel
                      RemoteConnectionChannel connectionChannel =
                          new RemoteConnectionChannel(
                              handler,
                              connection,
                              channelId,
                              outboundWindow,
                              inboundWindow,
                              outboundMessages,
                              inboundMessages,
                              outboundMessageSize,
                              inboundMessageSize);
                      RemoteConnectionChannel existing = handler.addChannel(connectionChannel);
                      if (existing != null) {
                        log.tracef("Encountered open request for duplicate %s", existing);
                        // the channel already exists, which means the remote side "forgot" about it
                        // or we somehow missed the close message.
                        // the only safe thing to do is to terminate the existing channel.
                        try {
                          refuseService(channelId, "Duplicate ID");
                        } finally {
                          existing.handleRemoteClose();
                        }
                        break;
                      }

                      // construct reply
                      Pooled<ByteBuffer> pooledReply = connection.allocate();
                      boolean ok2 = false;
                      try {
                        ByteBuffer replyBuffer = pooledReply.getResource();
                        replyBuffer.clear();
                        replyBuffer.put(Protocol.CHANNEL_OPEN_ACK);
                        replyBuffer.putInt(channelId);
                        ProtocolUtils.writeInt(
                            replyBuffer, Protocol.O_MAX_INBOUND_MSG_WINDOW_SIZE, inboundWindow);
                        ProtocolUtils.writeShort(
                            replyBuffer, Protocol.O_MAX_INBOUND_MSG_COUNT, inboundMessages);
                        if (inboundMessageSize != Long.MAX_VALUE) {
                          ProtocolUtils.writeLong(
                              replyBuffer, Protocol.O_MAX_INBOUND_MSG_SIZE, inboundMessageSize);
                        }
                        ProtocolUtils.writeInt(
                            replyBuffer, Protocol.O_MAX_OUTBOUND_MSG_WINDOW_SIZE, outboundWindow);
                        ProtocolUtils.writeShort(
                            replyBuffer, Protocol.O_MAX_OUTBOUND_MSG_COUNT, outboundMessages);
                        if (outboundMessageSize != Long.MAX_VALUE) {
                          ProtocolUtils.writeLong(
                              replyBuffer, Protocol.O_MAX_OUTBOUND_MSG_SIZE, outboundMessageSize);
                        }
                        replyBuffer.put((byte) 0);
                        replyBuffer.flip();
                        ok2 = true;
                        // send takes ownership of the buffer
                        connection.send(pooledReply);
                      } finally {
                        if (!ok2) pooledReply.free();
                      }

                      ok1 = true;

                      // Call the service open listener
                      connection
                          .getExecutor()
                          .execute(SpiUtils.getServiceOpenTask(connectionChannel, openListener));
                      break;
                    } finally {
                      // the inbound channel wasn't open so don't leak the ref count
                      if (!ok1) handler.handleInboundChannelClosed();
                    }
                  }
                case Protocol.MESSAGE_DATA:
                  {
                    log.trace("Received message data");
                    int channelId = buffer.getInt() ^ 0x80000000;
                    RemoteConnectionChannel connectionChannel = handler.getChannel(channelId);
                    if (connectionChannel == null) {
                      // ignore the data
                      log.tracef("Ignoring message data for expired channel");
                      break;
                    }
                    connectionChannel.handleMessageData(pooled);
                    // need a new buffer now
                    pooled = connection.allocate();
                    buffer = pooled.getResource();
                    break;
                  }
                case Protocol.MESSAGE_WINDOW_OPEN:
                  {
                    log.trace("Received message window open");
                    int channelId = buffer.getInt() ^ 0x80000000;
                    RemoteConnectionChannel connectionChannel = handler.getChannel(channelId);
                    if (connectionChannel == null) {
                      // ignore
                      log.tracef("Ignoring window open for expired channel");
                      break;
                    }
                    connectionChannel.handleWindowOpen(pooled);
                    break;
                  }
                case Protocol.MESSAGE_CLOSE:
                  {
                    log.trace("Received message async close");
                    int channelId = buffer.getInt() ^ 0x80000000;
                    RemoteConnectionChannel connectionChannel = handler.getChannel(channelId);
                    if (connectionChannel == null) {
                      break;
                    }
                    connectionChannel.handleAsyncClose(pooled);
                    break;
                  }
                case Protocol.CHANNEL_CLOSED:
                  {
                    log.trace("Received channel closed");
                    int channelId = buffer.getInt() ^ 0x80000000;
                    RemoteConnectionChannel connectionChannel = handler.getChannel(channelId);
                    if (connectionChannel == null) {
                      break;
                    }
                    connectionChannel.handleRemoteClose();
                    break;
                  }
                case Protocol.CHANNEL_SHUTDOWN_WRITE:
                  {
                    log.trace("Received channel shutdown write");
                    int channelId = buffer.getInt() ^ 0x80000000;
                    RemoteConnectionChannel connectionChannel = handler.getChannel(channelId);
                    if (connectionChannel == null) {
                      break;
                    }
                    connectionChannel.handleIncomingWriteShutdown();
                    break;
                  }
                case Protocol.CHANNEL_OPEN_ACK:
                  {
                    log.trace("Received channel open ack");
                    int channelId = buffer.getInt() ^ 0x80000000;
                    if ((channelId & 0x80000000) == 0) {
                      // invalid
                      break;
                    }
                    PendingChannel pendingChannel = handler.removePendingChannel(channelId);
                    if (pendingChannel == null) {
                      // invalid
                      break;
                    }
                    int outboundWindow = pendingChannel.getOutboundWindowSize();
                    int inboundWindow = pendingChannel.getInboundWindowSize();
                    int outboundMessageCount = pendingChannel.getOutboundMessageCount();
                    int inboundMessageCount = pendingChannel.getInboundMessageCount();
                    long outboundMessageSize = pendingChannel.getOutboundMessageSize();
                    long inboundMessageSize = pendingChannel.getInboundMessageSize();
                    OUT:
                    for (; ; ) {
                      switch (buffer.get() & 0xff) {
                        case Protocol.O_MAX_INBOUND_MSG_WINDOW_SIZE:
                          {
                            outboundWindow =
                                Math.min(outboundWindow, ProtocolUtils.readInt(buffer));
                            break;
                          }
                        case Protocol.O_MAX_INBOUND_MSG_COUNT:
                          {
                            outboundMessageCount =
                                Math.min(
                                    outboundMessageCount, ProtocolUtils.readUnsignedShort(buffer));
                            break;
                          }
                        case Protocol.O_MAX_OUTBOUND_MSG_WINDOW_SIZE:
                          {
                            inboundWindow = Math.min(inboundWindow, ProtocolUtils.readInt(buffer));
                            break;
                          }
                        case Protocol.O_MAX_OUTBOUND_MSG_COUNT:
                          {
                            inboundMessageCount =
                                Math.min(
                                    inboundMessageCount, ProtocolUtils.readUnsignedShort(buffer));
                            break;
                          }
                        case Protocol.O_MAX_INBOUND_MSG_SIZE:
                          {
                            outboundMessageSize =
                                Math.min(outboundMessageSize, ProtocolUtils.readLong(buffer));
                            break;
                          }
                        case Protocol.O_MAX_OUTBOUND_MSG_SIZE:
                          {
                            inboundMessageSize =
                                Math.min(inboundMessageSize, ProtocolUtils.readLong(buffer));
                            break;
                          }
                        case Protocol.O_END:
                          {
                            break OUT;
                          }
                        default:
                          {
                            // ignore unknown parameter
                            Buffers.skip(buffer, buffer.get() & 0xff);
                            break;
                          }
                      }
                    }
                    RemoteConnectionChannel newChannel =
                        new RemoteConnectionChannel(
                            handler,
                            connection,
                            channelId,
                            outboundWindow,
                            inboundWindow,
                            outboundMessageCount,
                            inboundMessageCount,
                            outboundMessageSize,
                            inboundMessageSize);
                    handler.putChannel(newChannel);
                    pendingChannel.getResult().setResult(newChannel);
                    break;
                  }
                case Protocol.SERVICE_ERROR:
                  {
                    log.trace("Received service error");
                    int channelId = buffer.getInt() ^ 0x80000000;
                    PendingChannel pendingChannel = handler.removePendingChannel(channelId);
                    if (pendingChannel == null) {
                      // invalid
                      break;
                    }
                    String reason = new String(Buffers.take(buffer), Protocol.UTF_8);
                    pendingChannel.getResult().setException(new IOException(reason));
                    break;
                  }
                default:
                  {
                    log.unknownProtocolId(protoId);
                    break;
                  }
              }
            } catch (BufferUnderflowException e) {
              log.bufferUnderflow(protoId);
            }
          } catch (BufferUnderflowException e) {
            log.bufferUnderflowRaw();
          } finally {
            buffer.clear();
          }
      } finally {
        pooled.free();
      }
    } catch (IOException e) {
      connection.handleException(e);
      handler.handleConnectionClose();
    }
  }
    public void handleEvent(final ConnectedMessageChannel channel) {
      final Pooled<ByteBuffer> pooledBuffer = connection.allocate();
      boolean free = true;
      try {
        final ByteBuffer buffer = pooledBuffer.getResource();
        synchronized (connection.getLock()) {
          final int res;
          try {
            res = channel.receive(buffer);
          } catch (IOException e) {
            connection.handleException(e);
            saslDispose(saslClient);
            return;
          }
          if (res == 0) {
            return;
          }
          if (res == -1) {
            connection.handleException(client.abruptClose(connection));
            saslDispose(saslClient);
            return;
          }
        }
        buffer.flip();
        final byte msgType = buffer.get();
        switch (msgType) {
          case Protocol.CONNECTION_ALIVE:
            {
              client.trace("Client received connection alive");
              connection.sendAliveResponse();
              return;
            }
          case Protocol.CONNECTION_ALIVE_ACK:
            {
              client.trace("Client received connection alive ack");
              return;
            }
          case Protocol.CONNECTION_CLOSE:
            {
              client.trace("Client received connection close request");
              connection.handlePreAuthCloseRequest();
              saslDispose(saslClient);
              return;
            }
          case Protocol.AUTH_CHALLENGE:
            {
              client.trace("Client received authentication challenge");
              channel.suspendReads();
              connection
                  .getExecutor()
                  .execute(
                      () -> {
                        try {
                          final boolean clientComplete = saslClient.isComplete();
                          if (clientComplete) {
                            connection.handleException(
                                new SaslException("Received extra auth message after completion"));
                            return;
                          }
                          final byte[] response;
                          final byte[] challenge = Buffers.take(buffer, buffer.remaining());
                          try {
                            response = saslClient.evaluateChallenge(challenge);
                          } catch (Throwable e) {
                            final String mechanismName = saslClient.getMechanismName();
                            client.debugf(
                                "Client authentication failed for mechanism %s: %s",
                                mechanismName, e);
                            failedMechs.put(mechanismName, e.toString());
                            saslDispose(saslClient);
                            sendCapRequest(serverName);
                            return;
                          }
                          client.trace("Client sending authentication response");
                          final Pooled<ByteBuffer> pooled = connection.allocate();
                          boolean ok = false;
                          try {
                            final ByteBuffer sendBuffer = pooled.getResource();
                            sendBuffer.put(Protocol.AUTH_RESPONSE);
                            sendBuffer.put(response);
                            sendBuffer.flip();
                            connection.send(pooled);
                            ok = true;
                            channel.resumeReads();
                          } finally {
                            if (!ok) pooled.free();
                          }
                          return;
                        } finally {
                          pooledBuffer.free();
                        }
                      });
              free = false;
              return;
            }
          case Protocol.AUTH_COMPLETE:
            {
              client.trace("Client received authentication complete");
              channel.suspendReads();
              connection
                  .getExecutor()
                  .execute(
                      () -> {
                        try {
                          final boolean clientComplete = saslClient.isComplete();
                          final byte[] challenge = Buffers.take(buffer, buffer.remaining());
                          if (!clientComplete)
                            try {
                              final byte[] response = saslClient.evaluateChallenge(challenge);
                              if (response != null && response.length > 0) {
                                connection.handleException(
                                    new SaslException(
                                        "Received extra auth message after completion"));
                                saslDispose(saslClient);
                                return;
                              }
                              if (!saslClient.isComplete()) {
                                connection.handleException(
                                    new SaslException(
                                        "Client not complete after processing auth complete message"));
                                saslDispose(saslClient);
                                return;
                              }
                            } catch (Throwable e) {
                              final String mechanismName = saslClient.getMechanismName();
                              client.debugf(
                                  "Client authentication failed for mechanism %s: %s",
                                  mechanismName, e);
                              failedMechs.put(mechanismName, e.toString());
                              saslDispose(saslClient);
                              sendCapRequest(serverName);
                              return;
                            }
                          final Object qop = saslClient.getNegotiatedProperty(Sasl.QOP);
                          if ("auth-int".equals(qop) || "auth-conf".equals(qop)) {
                            connection.setSaslWrapper(SaslWrapper.create(saslClient));
                          }
                          // auth complete.
                          final ConnectionHandlerFactory connectionHandlerFactory =
                              connectionContext -> {

                                // this happens immediately.
                                final RemoteConnectionHandler connectionHandler =
                                    new RemoteConnectionHandler(
                                        connectionContext,
                                        connection,
                                        maxInboundChannels,
                                        maxOutboundChannels,
                                        remoteEndpointName,
                                        behavior);
                                connection.setReadListener(
                                    new RemoteReadListener(connectionHandler, connection), false);
                                connection
                                    .getRemoteConnectionProvider()
                                    .addConnectionHandler(connectionHandler);
                                return connectionHandler;
                              };
                          connection.getResult().setResult(connectionHandlerFactory);
                          channel.resumeReads();
                          return;
                        } finally {
                          pooledBuffer.free();
                        }
                      });
              free = false;
              return;
            }
          case Protocol.AUTH_REJECTED:
            {
              final String mechanismName = saslClient.getMechanismName();
              client.debugf(
                  "Client received authentication rejected for mechanism %s", mechanismName);
              failedMechs.put(mechanismName, "Server rejected authentication");
              saslDispose(saslClient);
              sendCapRequest(serverName);
              return;
            }
          default:
            {
              client.unknownProtocolId(msgType);
              connection.handleException(client.invalidMessage(connection));
              saslDispose(saslClient);
              return;
            }
        }
      } finally {
        if (free) pooledBuffer.free();
      }
    }