예제 #1
0
 /**
  * Essential data that is being carried within SCTP Data Chunk
  *
  * @param msgInfo the {@link MessageInfo}
  * @param payloadBuffer channel buffer
  */
 public SctpMessage(MessageInfo msgInfo, ByteBuf payloadBuffer) {
   super(payloadBuffer);
   if (msgInfo == null) {
     throw new NullPointerException("msgInfo");
   }
   this.msgInfo = msgInfo;
   streamIdentifier = msgInfo.streamNumber();
   protocolIdentifier = msgInfo.payloadProtocolID();
   unordered = msgInfo.isUnordered();
 }
예제 #2
0
  private boolean read(SelectionKey k) {
    final SctpChannelImpl channel = (SctpChannelImpl) k.attachment();

    final ReceiveBufferSizePredictor predictor =
        channel.getConfig().getReceiveBufferSizePredictor();
    final int predictedRecvBufSize = predictor.nextReceiveBufferSize();

    boolean messageReceived = false;
    boolean failure = true;
    MessageInfo messageInfo = null;

    ByteBuffer bb = recvBufferPool.acquire(predictedRecvBufSize);
    try {
      messageInfo = channel.channel.receive(bb, null, notificationHandler);
      if (messageInfo != null) {
        messageReceived = true;
        if (!messageInfo.isUnordered()) {
          failure = false;
        } else {
          if (logger.isErrorEnabled()) {
            logger.error("Received unordered SCTP Packet");
          }
          failure = true;
        }
      } else {
        messageReceived = false;
        failure = false;
      }
    } catch (ClosedChannelException e) {
      // Can happen, and does not need a user attention.
    } catch (Throwable t) {
      fireExceptionCaught(channel, t);
    }

    if (messageReceived) {
      bb.flip();

      final ChannelBufferFactory bufferFactory = channel.getConfig().getBufferFactory();
      final int receivedBytes = bb.remaining();
      final ChannelBuffer buffer = bufferFactory.getBuffer(receivedBytes);
      buffer.setBytes(0, bb);
      buffer.writerIndex(receivedBytes);

      recvBufferPool.release(bb);

      // Update the predictor.
      predictor.previousReceiveBufferSize(receivedBytes);

      // Fire the event.
      fireMessageReceived(channel, new SctpFrame(messageInfo, buffer), messageInfo.address());
    } else {
      recvBufferPool.release(bb);
    }

    if (channel.channel.isBlocking() && !messageReceived || failure) {
      k.cancel(); // Some JDK implementations run into an infinite loop without this.
      close(channel, succeededFuture(channel));
      return false;
    }

    return true;
  }