Example usage for io.netty.buffer ByteBuf readUnsignedShort

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:org.eclipse.neoscada.protocol.iec60870.apci.APDUDecoder.java

License:Open Source License

private APCIBase decode(ByteBuf controlFields, final ByteBuf data) {
    logger.trace("Control Fields: {}", ByteBufUtil.hexDump(controlFields));

    controlFields = controlFields.order(ByteOrder.LITTLE_ENDIAN);

    final byte first = controlFields.getByte(0);
    if ((first & 0x01) == 0) {
        // I format
        final int sendSequenceNumber = controlFields.readUnsignedShort() >> 1;
        final int receiveSequenceNumber = controlFields.readUnsignedShort() >> 1;
        logger.debug("S: {}, R: {}", sendSequenceNumber, receiveSequenceNumber);
        return new InformationTransfer(sendSequenceNumber, receiveSequenceNumber, data);
    } else if ((first & 0x03) == 1) {
        // S format
        controlFields.skipBytes(2);/*from  w w  w . j a va  2 s .com*/
        final int receiveSequenceNumber = controlFields.readUnsignedShort() >> 1;
        return new Supervisory(receiveSequenceNumber);
    } else if ((first & 0x03) == 3) {
        // U format
        final Function function = convertFunction(controlFields.readUnsignedByte());
        return new UnnumberedControl(function);
    }

    // this should actually never happen

    throw new DecoderException("Invalid control fields");
}

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From source file:org.eclipse.neoscada.protocol.iec60870.asdu.types.TypeHelper.java

License:Open Source License

public static long parseTimestamp(final ProtocolOptions options, final ByteBuf data) {
    final int ms = data.readUnsignedShort();

    int minutes = data.readUnsignedByte();
    minutes = minutes & 0b00111111; // mask out IV and RES1

    int hours = data.readUnsignedByte();
    hours = hours & 0b00011111; // mask out SU and RES2

    final int dayOfMonth = data.readUnsignedByte() & 0b00011111; // directly mask out dayOfWeek

    final int month = data.readUnsignedByte() & 0b00001111; // directly mask out RES3
    int year = data.readUnsignedByte() & 0b01111111; // directly mask out RES4

    /*/*w w w.java 2s .  c o m*/
     * This would be the right spot for another rant on time formats ...
     * ... we simply add 2000 here since:
     * a) we assume that the software and the other side run "now" and don't
     *    transmit historical data from before 2000.
     * b) we also assume this software will be changed some time before 2114
     *    to handle this case ... so either upgrade to a different protocol by then
     *    or start your project fixing this issue by 2070 ;-)
     */
    year = year + 2000;

    final Calendar c = new GregorianCalendar(options.getTimeZone());
    c.set(year, month - 1, dayOfMonth, hours, minutes, ms / 1_000);
    c.set(Calendar.MILLISECOND, ms % 1_000);
    return c.getTimeInMillis();
}

---

From source file:org.hawkular.metrics.clients.ptrans.collectd.packet.CollectdPacketDecoder.java

License:Apache License

@Override
protected void decode(ChannelHandlerContext context, DatagramPacket packet, List<Object> out) throws Exception {
    long start = System.currentTimeMillis();
    ByteBuf content = packet.content();
    List<Part> parts = new ArrayList<>(100);
    for (;;) {/* w ww.j  a  v  a2  s  .com*/
        if (!hasReadableBytes(content, 4)) {
            break;
        }
        short partTypeId = content.readShort();
        PartType partType = PartType.findById(partTypeId);
        int partLength = content.readUnsignedShort();
        int valueLength = partLength - 4;
        if (!hasReadableBytes(content, valueLength)) {
            break;
        }
        if (partType == null) {
            content.skipBytes(valueLength);
            continue;
        }
        Part part;
        switch (partType) {
        case HOST:
        case PLUGIN:
        case PLUGIN_INSTANCE:
        case TYPE:
        case INSTANCE:
            part = new StringPart(partType, readStringPartContent(content, valueLength));
            break;
        case TIME:
        case TIME_HIGH_RESOLUTION:
        case INTERVAL:
        case INTERVAL_HIGH_RESOLUTION:
            part = new NumericPart(partType, readNumericPartContent(content));
            break;
        case VALUES:
            part = new ValuePart(partType, readValuePartContent(content, valueLength));
            break;
        default:
            part = null;
            content.skipBytes(valueLength);
        }
        //noinspection ConstantConditions
        if (part != null) {
            logger.trace("Decoded part: {}", part);
            parts.add(part);
        }
    }

    if (logger.isTraceEnabled()) {
        long stop = System.currentTimeMillis();
        logger.trace("Decoded datagram in {} ms", stop - start);
    }

    if (parts.size() > 0) {
        CollectdPacket collectdPacket = new CollectdPacket(parts);
        out.add(collectdPacket);
    } else {
        logger.debug("No parts decoded, no CollectdPacket output");
    }
}

---

From source file:org.hawkular.metrics.clients.ptrans.collectd.packet.CollectdPacketDecoder.java

License:Apache License

private Values readValuePartContent(ByteBuf content, int length) {
    int beginIndex = content.readerIndex();
    int total = content.readUnsignedShort();
    List<DataType> dataTypes = new ArrayList<>(total);
    for (int i = 0; i < total; i++) {
        byte sampleTypeId = content.readByte();
        dataTypes.add(DataType.findById(sampleTypeId));
    }/* www .  ja v a  2 s .  c o m*/
    List<Number> data = new ArrayList<>(total);
    for (DataType dataType : dataTypes) {
        switch (dataType) {
        case COUNTER:
        case ABSOLUTE:
            byte[] valueBytes = new byte[8];
            content.readBytes(valueBytes);
            data.add(new BigInteger(1, valueBytes));
            break;
        case DERIVE:
            data.add(content.readLong());
            break;
        case GAUGE:
            data.add(Double.longBitsToDouble(ByteBufUtil.swapLong(content.readLong())));
            break;
        default:
            logger.debug("Skipping unknown data type: {}", dataType);
        }
    }
    // Skip any additionnal bytes
    int readCount = content.readerIndex() - beginIndex;
    if (length > readCount) {
        content.skipBytes(readCount - length);
    }
    return new Values(dataTypes, data);
}

---

From source file:org.inspirenxe.server.network.codec.handshake.HandshakeCodec.java

License:MIT License

@Override
public HandshakeMessage decode(ByteBuf buf) throws IOException {
    final int version = ByteBufUtils.readVarInt(buf);
    final String address = ByteBufUtils.readUTF8(buf);
    final short port = (short) buf.readUnsignedShort();
    final HandshakeState state = HandshakeState.get(ByteBufUtils.readVarInt(buf));
    return new HandshakeMessage(version, address, port, state);
}

---

From source file:org.jfxvnc.net.rfb.codec.decoder.ColourMapEntriesDecoder.java

License:Apache License

@Override
public boolean decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {

    if (colorBuf == null) {
        if (!in.isReadable(12)) {
            return false;
        }/*  ww  w.ja  v  a 2  s .c  o  m*/
        in.skipBytes(2);
        firstColor = in.readUnsignedShort();
        numberOfColor = in.readUnsignedShort();
        int size = numberOfColor - firstColor;
        colorBuf = Unpooled.buffer(size * 6, size * 6);
    }
    colorBuf.writeBytes(in);

    if (!colorBuf.isWritable()) {
        return out.add(new ColourMapEntriesEvent(firstColor, numberOfColor, colorBuf));
    }
    return false;
}

---

From source file:org.jfxvnc.net.rfb.codec.decoder.FramebufferUpdateRectDecoder.java

License:Apache License

@Override
public boolean decode(ChannelHandlerContext ctx, ByteBuf m, List<Object> out) throws Exception {

    if (state == State.INIT) {
        logger.debug("init readable {} bytes", m.readableBytes());
        if (!m.isReadable()) {
            return false;
        }//from  w  w w.j a va 2s.  c o  m
        if (m.getByte(0) != ServerEvent.FRAMEBUFFER_UPDATE.getType()) {
            logger.error("no FBU type!!! {}", m.getByte(0));
            ctx.pipeline().fireChannelReadComplete();
            return false;
        }
        if (!m.isReadable(4)) {
            return false;
        }
        m.skipBytes(2); // padding
        numberRects = m.readUnsignedShort();
        currentRect = 0;
        logger.debug("number of rectangles: {}", numberRects);
        if (numberRects < 1) {
            return true;
        }
        state = State.NEW_RECT;
    }

    if (state == State.NEW_RECT) {
        if (!readRect(ctx, m, out)) {
            return false;
        }
        state = State.READ_RECT;
    }

    FrameRectDecoder dec = frameRectDecoder.get(rect.getEncoding());
    if (dec == null) {
        throw new ProtocolException("Encoding not supported: " + rect.getEncoding());
    }
    dec.setRect(rect);
    if (!dec.decode(ctx, m, out)) {
        return false;
    }

    if (currentRect == numberRects) {
        state = State.INIT;
        ctx.pipeline().fireUserEventTriggered(ProtocolState.FBU_REQUEST);
        return true;
    }

    if (!readRect(ctx, m, out)) {
        state = State.NEW_RECT;
    }
    return false;
}

---

From source file:org.jfxvnc.net.rfb.codec.decoder.FramebufferUpdateRectDecoder.java

License:Apache License

private boolean readRect(ChannelHandlerContext ctx, ByteBuf m, List<Object> out) {
    if (!m.isReadable(12)) {
        return false;
    }//from w  w  w  . j  a v  a  2s.c  o m
    int x = m.readUnsignedShort();
    int y = m.readUnsignedShort();
    int w = m.readUnsignedShort();
    int h = m.readUnsignedShort();
    int enc = m.readInt();

    rect = new FrameRect(x, y, w, h, Encoding.valueOf(enc));
    currentRect++;
    logger.debug("{}of{} - ({}) {}", currentRect, numberRects, rect, enc);

    if (w == 0 || h == 0) {
        if (currentRect == numberRects) {
            state = State.INIT;
            ctx.pipeline().fireUserEventTriggered(ProtocolState.FBU_REQUEST);
            return true;
        }
        return false;
    }
    return true;
}

---

From source file:org.jfxvnc.net.rfb.codec.handshaker.RfbClient33Decoder.java

License:Apache License

@Override
protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {
    switch (state()) {
    case SEC_TYPES:
        int type = in.readInt();
        SecurityType securityType = SecurityType.valueOf(type);
        logger.debug("supported security type: {}", securityType);
        checkpoint(securityType == SecurityType.VNC_Auth ? State.VNC_AUTH : State.SERVER_INIT);
        out.add(new SecurityTypesEvent(false, securityType));
        break;/*  ww w  . ja  va2s .  c  om*/
    case VNC_AUTH:
        byte[] challenge = new byte[16];
        in.readBytes(challenge);
        out.add(new VncAuthSecurityMessage(challenge));
        checkpoint(State.SEC_RESULT);
        break;
    case SEC_RESULT:
        int secResult = in.readInt();
        logger.debug("server login {}", secResult == 0 ? "succeed" : "failed");
        if (secResult == 1) {
            int length = in.readInt();
            if (length == 0) {
                out.add(new SecurityResultEvent(false, new ProtocolException("decode error message failed")));
                return;
            }
            byte[] text = new byte[length];
            in.readBytes(text);
            out.add(new SecurityResultEvent(false, new SecurityException(new String(text, ASCII))));
            return;
        }
        out.add(new SecurityResultEvent(true));
        checkpoint(State.SERVER_INIT);
        break;
    case SERVER_INIT:
        ServerInitEvent initMsg = new ServerInitEvent();

        initMsg.setFrameBufferWidth(in.readUnsignedShort());
        initMsg.setFrameBufferHeight(in.readUnsignedShort());

        initMsg.setPixelFormat(parsePixelFormat(in));

        byte[] name = new byte[in.readInt()];
        in.readBytes(name);

        initMsg.setServerName(new String(name, ASCII));
        out.add(initMsg);
        break;
    default:
        break;
    }
}

---

From source file:org.jfxvnc.net.rfb.codec.handshaker.RfbClient33Decoder.java

License:Apache License

protected PixelFormat parsePixelFormat(ByteBuf m) {

    PixelFormat pf = new PixelFormat();

    pf.setBitPerPixel(m.readUnsignedByte());
    pf.setDepth(m.readUnsignedByte());/*from  w  w w.  j a  v a  2s  .  c om*/
    pf.setBigEndian(m.readUnsignedByte() == 1);
    pf.setTrueColor(m.readUnsignedByte() == 1);
    pf.setRedMax(m.readUnsignedShort());
    pf.setGreenMax(m.readUnsignedShort());
    pf.setBlueMax(m.readUnsignedShort());

    pf.setRedShift(m.readUnsignedByte());
    pf.setGreenShift(m.readUnsignedByte());
    pf.setBlueShift(m.readUnsignedByte());
    m.skipBytes(3);

    return pf;
}

---

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