Example usage for io.netty.buffer ByteBuf readByte

Introduction

In this page you can find the example usage for io.netty.buffer ByteBuf readByte.

Prototype

public abstract byte readByte();

Source Link

Document

Gets a byte at the current readerIndex and increases the readerIndex by 1 in this buffer.

Usage

From source file:com.whizzosoftware.wzwave.codec.ZWaveFrameDecoder.java

License:Open Source License

@Override
protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {
    if (logger.isDebugEnabled()) {
        logger.debug("RCVD: {}", ByteUtil.createString(in));
    }/*from w  ww.ja v a 2s  .  c  om*/

    ByteBuf data;

    // if there was data left from the last decode call, create a composite ByteBuf that contains both
    // previous and new data
    if (previousBuf != null) {
        CompositeByteBuf cbuf = Unpooled.compositeBuffer(2);
        cbuf.addComponent(previousBuf.copy());
        cbuf.addComponent(in);
        cbuf.writerIndex(previousBuf.readableBytes() + in.readableBytes());
        data = cbuf;
        // release the data from the previous decode call
        previousBuf.release();
        previousBuf = null;
    } else {
        data = in;
    }

    while (data.isReadable()) {
        // check for single ACK/NAK/CAN
        if (data.readableBytes() == 1 && isSingleByteFrame(data, data.readerIndex())) {
            out.add(createSingleByteFrame(data));
        } else {
            boolean foundFrame = false;
            // search for a valid frame in the data
            for (int searchStartIx = data.readerIndex(); searchStartIx < data.readerIndex()
                    + data.readableBytes(); searchStartIx++) {
                if (data.getByte(searchStartIx) == DataFrame.START_OF_FRAME) {
                    int frameEndIx = scanForFrame(data, searchStartIx);
                    if (frameEndIx > 0) {
                        if (searchStartIx > data.readerIndex() && isSingleByteFrame(data, searchStartIx - 1)) {
                            data.readerIndex(searchStartIx - 1);
                            out.add(createSingleByteFrame(data));
                        } else if (searchStartIx > data.readerIndex()) {
                            data.readerIndex(searchStartIx);
                        }
                        DataFrame df = createDataFrame(data);
                        if (df != null) {
                            out.add(df);
                            data.readByte(); // discard checksum
                            foundFrame = true;
                        } else {
                            logger.debug("Unable to determine frame type");
                        }
                    }
                }
            }
            if (!foundFrame) {
                previousBuf = data.copy();
                break;
            }
        }
    }

    // make sure we read from the input ByteBuf so Netty doesn't throw an exception
    in.readBytes(in.readableBytes());

    logger.trace("Done processing received data: {}", out);
}

From source file:com.whizzosoftware.wzwave.codec.ZWaveFrameDecoder.java

License:Open Source License

private Frame createSingleByteFrame(ByteBuf data) {
    byte b = data.readByte();
    if (b == ACK.ID) {
        return new ACK();
    } else if (b == NAK.ID) {
        return new NAK();
    } else if (b == CAN.ID) {
        return new CAN();
    } else {//from  w w  w .  j  a  va 2s  .  c o  m
        return null;
    }
}

From source file:com.whizzosoftware.wzwave.frame.AddNodeToNetwork.java

License:Open Source License

public AddNodeToNetwork(ByteBuf buffer) {
    super(buffer);

    funcId = buffer.readByte();
    status = buffer.readByte();//from   w w w.  j  a v a 2  s  .c  o  m
    source = buffer.readByte();

    // read node info if present
    byte len = buffer.readByte();
    if (len > 0) {
        byte basicClass = buffer.readByte();
        byte genericClass = buffer.readByte();
        byte specificClass = buffer.readByte();
        byte[] commandClasses = new byte[len - 3];
        for (int i = 0; i < len - 3; i++) {
            commandClasses[i] = buffer.readByte();
        }
        nodeInfo = new NodeInfo(source, basicClass, genericClass, specificClass, commandClasses);
    }
}

From source file:com.whizzosoftware.wzwave.frame.ApplicationCommand.java

License:Open Source License

public ApplicationCommand(ByteBuf buffer) {
    super(buffer);

    this.status = buffer.readByte();
    this.nodeId = buffer.readByte();

    byte cmdLength = buffer.readByte();
    commandClassBytes = buffer.readBytes(cmdLength).array();
}

From source file:com.whizzosoftware.wzwave.frame.ApplicationUpdate.java

License:Open Source License

public ApplicationUpdate(ByteBuf buffer) {
    super(buffer);
    state = buffer.readByte();
    this.nodeId = buffer.readByte();
    if (state == UPDATE_STATE_NODE_INFO_RECEIVED) {
        nodeInfo = new NodeInfo(this.nodeId, buffer, dataFrameLength - 6);
    } else {//  w w  w  .j  a  va  2 s.c  o m
        buffer.readByte(); // read 0 length
    }
}

From source file:com.whizzosoftware.wzwave.frame.DataFrame.java

License:Open Source License

/**
 * Constructor.//from   w w  w . j a  v a  2  s . co m
 *
 * @param buffer the readable byte buffer
 */
public DataFrame(ByteBuf buffer) {
    if (buffer.readByte() != START_OF_FRAME) {
        throw new RuntimeException("Data frame parsing error: no SOF");
    }
    this.dataFrameLength = buffer.readByte();
    if (buffer.readableBytes() < dataFrameLength) {
        throw new RuntimeException("Data framing length error");
    }
    this.type = (buffer.readByte() == 0 ? DataFrameType.REQUEST : DataFrameType.RESPONSE);
    this.commandId = buffer.readByte();
}

From source file:com.whizzosoftware.wzwave.frame.InitData.java

License:Open Source License

public InitData(ByteBuf buffer) {
    super(buffer);

    this.version = buffer.readByte();
    this.capabilities = buffer.readByte();

    // read the node information form the bit mask
    if (buffer.readByte() == NODE_BITMASK_SIZE) {
        // 29 bytes * 8 bits == 232 == the number of possible nodes in the network
        for (int i = 0; i < NODE_BITMASK_SIZE; i++) {
            byte b = buffer.readByte();
            for (int j = 0; j < 8; j++) {
                byte nodeId = (byte) ((i * 8) + j + 1);
                if ((b & (0x01 << j)) > 0) {
                    nodes.add(nodeId);// w  ww . j a  v a  2  s.c  o  m
                }
            }
        }
    }

    buffer.readByte(); // unsure what this is
    buffer.readByte(); // unsure what this is
}

From source file:com.whizzosoftware.wzwave.frame.MemoryGetId.java

License:Open Source License

public MemoryGetId(ByteBuf buffer) {
    super(buffer);

    homeId = (((int) buffer.readByte()) << 24) | (((int) buffer.readByte()) << 16)
            | (((int) buffer.readByte()) << 8) | ((int) buffer.readByte());
    nodeId = buffer.readByte();/*from ww  w.  ja va2  s.c  o m*/
}

From source file:com.whizzosoftware.wzwave.frame.NodeProtocolInfo.java

License:Open Source License

public NodeProtocolInfo(ByteBuf buffer) {
    super(buffer);

    byte b4 = buffer.readByte();
    byte b5 = buffer.readByte();
    byte b6 = buffer.readByte();
    byte b7 = buffer.readByte();
    byte b8 = buffer.readByte();
    byte b9 = buffer.readByte();

    // capabilities
    listening = ((b4 & 0x80) != 0);/*from ww  w  .  jav  a2 s .  c o  m*/
    beaming = ((b5 & 0x10) != 0);
    routing = ((b4 & 0x40) != 0);

    maxBaudRate = 9600;
    if ((b4 & 0x38) == 0x10) {
        maxBaudRate = 40000;
    }

    version = (b4 & 0x07) + 1;
    security = ((b5 & 0x01) != 0);

    // device classes
    basicDeviceClass = b7;
    genericDeviceClass = b8;
    specificDeviceClass = b9;
}

From source file:com.whizzosoftware.wzwave.frame.RemoveNodeFromNetwork.java

License:Open Source License

public RemoveNodeFromNetwork(ByteBuf buffer) {
    super(buffer);

    funcId = buffer.readByte();
    status = buffer.readByte();//  ww  w .j a  v  a2 s .  c  om
    source = buffer.readByte();

    // read node info if present
    byte len = buffer.readByte();
    if (len > 0) {
        byte basicClass = buffer.readByte();
        byte genericClass = buffer.readByte();
        byte specificClass = buffer.readByte();
        byte[] commandClasses = new byte[len - 3];
        for (int i = 0; i < len - 3; i++) {
            commandClasses[i] = buffer.readByte();
        }
        nodeInfo = new NodeInfo(source, basicClass, genericClass, specificClass, commandClasses);
    }
}