Example usage for io.netty.buffer ByteBuf readUnsignedShort

List of usage examples for io.netty.buffer ByteBuf readUnsignedShort

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Introduction

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

Prototype

public abstract int readUnsignedShort();

Source Link

Document

Gets an unsigned 16-bit short integer at the current readerIndex and increases the readerIndex by 2 in this buffer.

Usage

From source file:me.melchor9000.net.resolver.DNSResourceData.java

License:Open Source License

static DNSResourceData forData(int type, ByteBuf data) {
    data.readUnsignedShort(); //length
    switch (type) {
    case 1://from   w ww . j  a va  2  s.com
        return new DNSA(data);
    case 5:
        return new DNSCNAME(data);
    case 15:
        return new DNSMX(data);
    case 28:
        return new DNSAAAA(data);
    default:
        return null;
    }
}

From source file:me.melchor9000.net.resolver.DNSResourceRecord.java

License:Open Source License

private int rs(ByteBuf buf) {
    if (buf.readableBytes() < 2)
        throw new DataNotRepresentsObject("Is an incomplete DNS Resource Record", buf);
    return buf.readUnsignedShort();
}

From source file:net.epsilony.utils.codec.modbus.func.ReadRegistersFunction.java

License:Open Source License

@Override
public void decodeRequestData(ByteBuf data) {
    if (data.readableBytes() < 4) {
        throw new DecoderException();
    }/*  w  w  w  .j ava  2s .com*/
    startingAddress = data.readUnsignedShort();
    setQuantity(data.readUnsignedShort());
}

From source file:net.epsilony.utils.codec.modbus.func.ReadWordRegistersFunction.java

License:Open Source License

@Override
public void decodeResponseData(ByteBuf data, ModbusResponse response) {
    if (data.readableBytes() < getResponseDataLength()) {
        throw new DecoderException();
    }/*from   w  w w  . j  ava  2  s.c o  m*/

    ReadWordRegistersResponse readWordRegistersResponse = (ReadWordRegistersResponse) response;

    readWordRegistersResponse.setStartingAddress(startingAddress);

    int dataContentBytes = data.readUnsignedByte();
    if (dataContentBytes != getResponseDataLength() - 1) {
        throw new DecoderException();
    }

    readWordRegistersResponse.setQuantityAndAllocate(quantity);
    for (int i = 0; i < quantity; i++) {
        readWordRegistersResponse.setValue(i, data.readUnsignedShort());
    }
}

From source file:net.epsilony.utils.codec.modbus.func.WriteCoilFunction.java

License:Open Source License

@Override
public void decodeRequestData(ByteBuf data) {
    setAddress(data.readUnsignedShort());
    value = data.readUnsignedShort() == 0xFF00;
}

From source file:net.epsilony.utils.codec.modbus.func.WriteCoilFunction.java

License:Open Source License

@Override
public void decodeResponseData(ByteBuf data, ModbusResponse response) {
    WriteCoilResponse rResponse = (WriteCoilResponse) response;
    rResponse.setAddress(data.readUnsignedShort());
    rResponse.setValue(data.readUnsignedShort() == 0xFF00);
    if (rResponse.getAddress() != address || rResponse.getValue() != value) {
        throw new UnexpectedResponseException();
    }/*from w  w  w .java 2 s  .  com*/
}

From source file:net.epsilony.utils.codec.modbus.func.WriteHoldingFunction.java

License:Open Source License

@Override
public void decodeRequestData(ByteBuf data) {
    address = data.readUnsignedShort();
    value = data.readUnsignedShort();
}

From source file:net.epsilony.utils.codec.modbus.func.WriteHoldingFunction.java

License:Open Source License

@Override
public void decodeResponseData(ByteBuf data, ModbusResponse response) {
    WriteHoldingResponse hResponse = (WriteHoldingResponse) response;
    hResponse.setAddress(data.readUnsignedShort());
    hResponse.setValue(data.readUnsignedShort());
    if (hResponse.getAddress() != address || hResponse.getValue() != value) {
        throw new UnexpectedResponseException();
    }/*from   w w w . j  a  v  a 2  s.  c o m*/
}

From source file:net.epsilony.utils.codec.modbus.handler.ModbusMasterResponseDecoder.java

License:Open Source License

@Override
protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {
    if (in.readableBytes() < 6) {
        return;/*  w  ww.  ja v  a 2s .  com*/
    }
    int adupLength = in.getUnsignedShort(in.readerIndex() + 4);
    int wholeLength = adupLength + 6 + (withCheckSum ? 2 : 0);
    if (wholeLength > in.readableBytes()) {
        return;
    }
    if (withCheckSum) {
        checkSum(in, wholeLength);
    }
    int transectionId = in.readUnsignedShort();
    ModbusRequest request = transectingRequestRetriever.apply(transectionId);
    if (null == request) {
        in.readerIndex(in.readerIndex() + wholeLength - 2);
        out.add(new MissMatchResponse(transectionId));
        return;
    }
    in.readerIndex(in.readerIndex() + 4);
    int unitId = in.readUnsignedByte();
    if (unitId != request.getUnitId()) {
        throw new DecoderException();
    }
    int functionCode = in.readUnsignedByte();
    if ((functionCode & 0x7F) != request.getFunction().getCode()) {
        throw new DecoderException();
    }

    ModbusResponse response;

    if ((functionCode & 0x80) == 0) {
        switch (functionCode) {
        case 0x01: {
            ReadBooleanRegistersResponse bResponse = new ReadBooleanRegistersResponse();
            bResponse.setRegisterType(ModbusRegisterType.COIL);
            response = bResponse;
        }
            break;
        case 0x02: {
            ReadBooleanRegistersResponse bResponse = new ReadBooleanRegistersResponse();
            bResponse.setRegisterType(ModbusRegisterType.DISCRETE_INPUT);
            response = bResponse;
        }
            break;
        case 0x03: {
            ReadWordRegistersResponse rResponse = new ReadWordRegistersResponse();
            rResponse.setRegisterType(ModbusRegisterType.HOLDING);
            response = rResponse;
            break;
        }
        case 0x04: {
            ReadWordRegistersResponse rResponse = new ReadWordRegistersResponse();
            rResponse.setRegisterType(ModbusRegisterType.INPUT);
            response = rResponse;
        }
            break;
        case 0x05:
            response = new WriteCoilResponse();
            break;
        case 0x06:
            response = new WriteHoldingResponse();
            break;
        default:
            throw new UnsupportedFunctionCodeException();
        }
        request.getFunction().decodeResponseData(in, response);
    } else {
        ExceptionResponse exResponse = new ExceptionResponse();
        exResponse.setFunctionCode(functionCode);
        exResponse.setExceptionCode(in.readUnsignedByte());
        response = exResponse;
    }
    response.setTransectionId(transectionId);
    response.setUnitId(unitId);

    out.add(response);

    if (withCheckSum) {
        in.readerIndex(in.readerIndex() + 2);
    }

}

From source file:net.epsilony.utils.codec.modbus.handler.ModbusSlaveRequestDecoder.java

License:Open Source License

@Override
protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {
    if (in.readableBytes() < 6) {
        return;//  w  ww. j  av a 2 s  . c  om
    }
    int aduLength = in.getUnsignedShort(in.readerIndex() + 4);
    int wholeLength = 6 + aduLength + (withCheckSum ? 2 : 0);
    if (in.readableBytes() < wholeLength) {
        return;
    }

    if (withCheckSum) {
        checkSum(in, wholeLength);
    }
    int transectionId = in.readUnsignedShort();
    in.readerIndex(in.readerIndex() + 4);
    int unitId = in.readUnsignedByte();
    int functionCode = in.readUnsignedByte();
    ModbusFunction function;
    switch (functionCode) {
    case 0x01:
        function = new ReadBooleanRegistersFunction(ModbusRegisterType.COIL);
        break;
    case 0x02:
        function = new ReadBooleanRegistersFunction(ModbusRegisterType.DISCRETE_INPUT);
        break;
    case 0x03:
        function = new ReadWordRegistersFunction(ModbusRegisterType.HOLDING);
        break;
    case 0x04:
        function = new ReadWordRegistersFunction(ModbusRegisterType.INPUT);
        break;
    case 0x05:
        function = new WriteCoilFunction();
        break;
    case 0x06:
        function = new WriteHoldingFunction();
        break;
    default:
        throw new UnsupportedFunctionCodeException();
    }
    try {
        function.decodeRequestData(in);
    } catch (Throwable ex) {
        if (ex instanceof DecoderException) {
            throw ex;
        } else {
            throw new DecoderException(ex);
        }
    }
    ModbusRequest request = new ModbusRequest(transectionId, unitId, function);
    out.add(request);
    if (withCheckSum) {
        in.readerIndex(in.readerIndex() + 2);
    }
}