Example usage for io.netty.buffer ByteBuf readUnsignedByte

Introduction

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

Prototype

public abstract short readUnsignedByte();

Source Link

Document

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

Usage

From source file:com.spotify.folsom.client.ascii.AsciiMemcacheDecoder.java

License:Apache License

private StringBuilder readLine(final ByteBuf buf, final int available) throws IOException {
    if (consumed) {
        line.setLength(0);/*from  w  w w.ja  va  2 s  . co m*/
        consumed = false;
    }
    for (int i = 0; i < available - 1; i++) {
        final char b = (char) buf.readUnsignedByte();
        if (b == '\r') {
            if (buf.readUnsignedByte() == '\n') {
                consumed = true;
                return line;
            }
            throw new IOException("Expected newline, got something else");
        }
        line.append(b);
    }
    return null;
}

---

From source file:com.spotify.folsom.client.binary.BinaryMemcacheDecoder.java

License:Apache License

@Override
protected void decode(final ChannelHandlerContext ctx, final ByteBuf buf, final List<Object> out)
        throws Exception {
    for (int i = 0; i < BATCH_SIZE; i++) {
        if (buf.readableBytes() < 24) {
            return;
        }// ww w.  j  a v  a  2  s. c  o m

        buf.markReaderIndex();

        final int magicNumber = buf.readUnsignedByte(); // byte 0
        if (magicNumber != 0x81) {
            throw fail(buf, String.format("Invalid magic number: 0x%2x", magicNumber));
        }

        final int opcode = buf.readByte(); // byte 1
        final int keyLength = buf.readUnsignedShort(); // byte 2-3
        final int extrasLength = buf.readUnsignedByte(); // byte 4
        buf.skipBytes(1);
        final int statusCode = buf.readUnsignedShort(); // byte 6-7

        final MemcacheStatus status = MemcacheStatus.fromInt(statusCode);

        final int totalLength = buf.readInt(); // byte 8-11
        final int opaque = buf.readInt();

        final long cas = buf.readLong();

        if (buf.readableBytes() < totalLength) {
            buf.resetReaderIndex();
            return;
        }

        buf.skipBytes(extrasLength);

        buf.skipBytes(keyLength);

        final int valueLength = totalLength - keyLength - extrasLength;
        byte[] valueBytes;
        if (valueLength == 0) {
            valueBytes = NO_BYTES;
        } else {
            valueBytes = new byte[valueLength];
        }

        buf.readBytes(valueBytes);

        replies.add(new ResponsePacket((byte) opcode, status, opaque, cas, valueBytes));
        if ((opaque & 0xFF) == 0) {
            out.add(replies);
            replies = new BinaryResponse();
        }
    }
}

---

From source file:com.streamsets.pipeline.lib.parser.net.netflow.v5.NetflowV5Decoder.java

License:Apache License

@Override
public List<NetflowV5Message> parse(int netflowVersion, int packetLength, boolean packetLengthCheck,
        ByteBuf buf, InetSocketAddress sender, InetSocketAddress recipient) throws OnRecordErrorException {
    if (!readHeader) {
        // 2-3//from  www . j a v  a2s  .  c o  m
        count = buf.readUnsignedShort();
        if (count <= 0) {
            throw new OnRecordErrorException(Errors.NETFLOW_01, Utils.format("Count is invalid: {}", count));
        } else if (packetLengthCheck && packetLength < V5_HEADER_SIZE + count * V5_FLOW_SIZE) {
            String msg = Utils.format("Readable bytes {} too small for count {} (max {})", packetLength, count,
                    (V5_HEADER_SIZE + count * V5_FLOW_SIZE));
            throw new OnRecordErrorException(Errors.NETFLOW_01, msg);
        }
        readerId = String.valueOf(recipient);
        // 4-7
        uptime = buf.readUnsignedInt();
        // 8-11
        seconds = buf.readUnsignedInt();
        // 12-15
        nanos = buf.readUnsignedInt();

        millis = nanos / 1000000;

        // java timestamp, which is milliseconds
        timestamp = (seconds * 1000L) + millis;
        packetId = UUIDs.startOfJavaTimestamp(timestamp);

        // 16-19
        flowSequence = buf.readUnsignedInt();
        // 20
        engineType = buf.readUnsignedByte();
        // 21
        engineId = buf.readUnsignedByte();
        // the first 2 bits are the sampling mode, the remaining 14 the interval
        // 22-23
        sampling = buf.readUnsignedShort();
        samplingInterval = sampling & 0x3FFF;
        samplingMode = sampling >> 14;
        readHeader = true;
        parentDecoder.doCheckpoint();
    }

    while (readIndex < count) {
        //ByteBuf flowBuf = buf.slice(V5_HEADER_SIZE + (readIndex * V5_FLOW_SIZE), V5_FLOW_SIZE);

        NetflowV5Message msg = new NetflowV5Message();
        msg.setSeconds(seconds);
        msg.setNanos(nanos);
        msg.setCount(count);

        // 0
        int srcaddr = (int) buf.readUnsignedInt();
        // 4
        int dstaddr = (int) buf.readUnsignedInt();
        // 8
        int nexthop = (int) buf.readUnsignedInt();
        // 12
        msg.setSnmpInput(buf.readUnsignedShort());
        // 14
        msg.setSnmpOnput(buf.readUnsignedShort());

        msg.setPacketId(packetId.toString());
        msg.setSender((sender == null) ? "unknown" : sender.getAddress().toString());
        msg.setLength(packetLength);
        msg.setUptime(uptime);
        msg.setTimestamp(timestamp);
        msg.setFlowSequence(flowSequence);
        msg.setEngineId(engineId);
        msg.setEngineType(engineType);
        msg.setRawSampling(sampling);
        msg.setSamplingInterval(samplingInterval);
        msg.setSamplingMode(samplingMode);
        msg.setReaderId(readerId);

        // 16
        long packets = buf.readUnsignedInt();
        // 20
        long octets = buf.readUnsignedInt();
        // 24
        long first = buf.readUnsignedInt();
        msg.setRawFirst(first);
        if (first > 0) {
            msg.setFirst(timestamp - uptime + first);
        } else {
            msg.setFirst(0L);
        }

        // 28
        long last = buf.readUnsignedInt();
        msg.setRawLast(last);
        if (last > 0) {
            msg.setLast(timestamp - uptime + last);
        } else {
            msg.setLast(0L);
        }

        msg.setId(UUIDs.timeBased().toString());
        msg.setSrcAddr(srcaddr);
        msg.setDstAddr(dstaddr);
        msg.setNextHop(nexthop);
        msg.setSrcAddrString(NetflowCommonDecoder.ipV4ToString(srcaddr));
        msg.setDstAddrString(NetflowCommonDecoder.ipV4ToString(dstaddr));
        msg.setNexthopString(NetflowCommonDecoder.ipV4ToString(nexthop));
        // 32
        msg.setSrcPort(buf.readUnsignedShort());
        // 34
        msg.setDstPort(buf.readUnsignedShort());
        // 36 is "pad1" (unused zero bytes)
        buf.readByte();
        // 37
        msg.setTcpFlags(buf.readUnsignedByte());
        // 38
        msg.setProto(buf.readUnsignedByte());
        // 39
        msg.setTos(buf.readUnsignedByte());
        // 40
        msg.setSrcAs(buf.readUnsignedShort());
        // 42
        msg.setDstAs(buf.readUnsignedShort());
        // 44
        msg.setSrcMask(buf.readUnsignedByte());
        // 45
        msg.setDstMask(buf.readUnsignedByte());
        msg.setdPkts(packets);
        msg.setdOctets(octets);

        // 46-47 is "pad2" (unused zero bytes)
        buf.skipBytes(2);
        result.add(msg);
        readIndex++;
        parentDecoder.doCheckpoint();
    }

    // if we reached this point without any further Signal errors, we have finished consuming
    //checkpoint();
    LinkedList<NetflowV5Message> returnResults = new LinkedList<>(result);
    resetState();
    return returnResults;
}

---

From source file:com.tesora.dve.db.mysql.common.MysqlAPIUtils.java

License:Open Source License

public static long getLengthCodedLong(ByteBuf cb) {
    short byte1 = cb.readUnsignedByte();
    if (byte1 == LEN_CODED_NULL)
        return 0;
    if (byte1 <= LEN_CODED_8_BITS) {
        return byte1;
    } else if (byte1 == LEN_CODED_16_BITS) {
        return cb.readUnsignedShort();
    } else if (byte1 == LEN_CODED_24_BITS)
        return cb.readUnsignedMedium();

    return cb.readLong();
}

---

From source file:com.tesora.dve.db.mysql.common.MysqlAPIUtils.java

License:Open Source License

static boolean isLengthCodedLongNull(ByteBuf cb) {
    boolean isNull = (cb.getUnsignedByte(cb.readerIndex()) == LEN_CODED_NULL);
    if (isNull)/*from  w  ww  . ja v a  2s . co m*/
        cb.readUnsignedByte();

    return isNull;
}

---

From source file:com.tesora.dve.db.mysql.common.MysqlAPIUtils.java

License:Open Source License

/**
 * Methods to read and write length coded dates in the Binary Protocol
 * /*from   w  w  w  .j a v  a2  s .c  o  m*/
 * if year, month, day, hour, minutes, seconds and micro_seconds are all 0,
 * length is 0 and no other field is sent if hour, minutes, seconds and
 * micro_seconds are all 0, length is 4 and no other field is sent if
 * micro_seconds is 0, length is 7 and micro_seconds is not sent otherwise
 * length is 11
 * 
 * Fields 
 *       length (1) -- number of bytes following (valid values: 0, 4, 7, 11) 
 *       year (2) -- year 
 *       month (1) -- month 
 *       day (1) -- day 
 *       hour (1) -- hour
 *       minute (1) -- minutes 
 *       second (1) -- seconds 
 *       micro_second (4) -- micro-seconds
 * 
 */
public static Date getLengthCodedDate(ByteBuf cb) throws PEException {
    final Calendar cal = Calendar.getInstance();
    cal.clear();

    short length = cb.readUnsignedByte();
    if (length >= 4) {
        cal.set(Calendar.YEAR, cb.readUnsignedShort());
        cal.set(Calendar.MONTH, cb.readByte() - 1); // MONTH is zero based
        cal.set(Calendar.DAY_OF_MONTH, cb.readByte());

        if (length >= 7) {
            cal.set(Calendar.HOUR_OF_DAY, cb.readByte());
            cal.set(Calendar.MINUTE, cb.readByte());
            cal.set(Calendar.SECOND, cb.readByte());
        }

        if (length == 11) {
            long microSeconds = cb.readUnsignedInt();
            cal.set(Calendar.MILLISECOND, (int) (microSeconds / 1000));
        }

        if (length > 11) {
            throw new PEException("Invalid length specified to date type (" + length + ")");
        }

        return cal.getTime();
    }

    return null;
}

---

From source file:com.tesora.dve.db.mysql.common.MysqlAPIUtils.java

License:Open Source License

/**
 * Methods to read and write length coded times in the Binary Protocol
 * /*  ww w.j av  a2 s .c o  m*/
 * if days, hours, minutes, seconds and micro_seconds are all 0, length is 0
 * and no other field is sent
 * 
 * if micro_seconds is 0, length is 8 and micro_seconds is not sent
 * otherwise length is 12
 * 
 * Fields 
 *       length (1) -- number of bytes following (valid values: 0, 8, 12)
 *       is_negative (1) -- (1 if minus, 0 for plus) 
 *       days (4) -- days 
 *       hours (1) -- hours
 *       minutes (1) -- minutes
 *       seconds (1) -- seconds
 *       micro_seconds (4) -- micro-seconds
 */
public static Time getLengthCodedTime(ByteBuf cb) throws PEException {
    Calendar cal = Calendar.getInstance();
    cal.clear();
    short length = cb.readUnsignedByte();

    if (length == 0)
        return null;

    Time ret = null;

    if (length >= 8) {
        cb.skipBytes(1); // this is the sign - we are ignoring this for now
        cb.skipBytes(4); // this is "days" - we are ignoring this for now
        cal.set(Calendar.HOUR_OF_DAY, cb.readByte());
        cal.set(Calendar.MINUTE, cb.readByte());
        cal.set(Calendar.SECOND, cb.readByte());
        if (length == 12) {
            long microSeconds = cb.readUnsignedInt();
            cal.set(Calendar.MILLISECOND, (int) (microSeconds / 1000));
        }
        if (length > 12) {
            throw new PEException("Invalid length specified to date type (" + length + ")");
        }

        ret = new Time(cal.getTimeInMillis());
    }
    return ret;
}

---

From source file:com.tesora.dve.mysqlapi.repl.messages.MyFormatDescriptionLogEvent.java

License:Open Source License

@Override
public void unmarshallMessage(ByteBuf cb) {
    binaryLogVersion = cb.readShort();//from w  w w  .  j  a  v  a  2s  .  c  o m
    serverVersion = MysqlAPIUtils.readBytesAsString(cb, ST_SERVER_VER_LEN, CharsetUtil.UTF_8);
    createTime = cb.readUnsignedInt();
    eventTypeLength = cb.readUnsignedByte();
    int numberOfEntries = cb.readableBytes() - 1;//string is null terminated.

    switch (MyBinLogVerType.fromByte((byte) binaryLogVersion)) {

    case MySQL_5_0:
        for (int i = 1; i <= numberOfEntries; i++) {
            eventTypeValues.put(MyLogEventType.fromByte((byte) i), cb.readByte());
        }
        cb.skipBytes(1);//throw out EOF
        break;

    default:
        // TODO throw????
        logger.error("Cannot process binary log messages that are not for MySQL 5.0");
    }
}

---

From source file:com.tesora.dve.mysqlapi.repl.messages.MyUserVarLogEvent.java

License:Open Source License

long readValue(ByteBuf decimalPortionBuf, int valueLen) throws PEException {
    if (valueLen < 1 || valueLen > 4)
        throw new PEException("Cannot decode decimal buffer.  Invalid read length of " + valueLen);

    long value = 0;
    if (valueLen == 4) {
        value = decimalPortionBuf.readUnsignedInt();
    } else if (valueLen == 3) {
        value = decimalPortionBuf.readUnsignedMedium();
    } else if (valueLen == 2) {
        value = decimalPortionBuf.readUnsignedShort();
    } else if (valueLen == 1) {
        value = decimalPortionBuf.readUnsignedByte();
    }/*from   w w w .j a va 2  s . c  om*/
    return value;
}

---

From source file:com.trinity.engine.protocol.detail.ConnectionReplayingDecoder.java

License:Apache License

/**
 * {@inheritDoc}//from   w w  w .ja v  a 2s .  co m
 */
@Override
protected void decode(ChannelHandlerContext context, ByteBuf input, List<Object> output) throws Exception {
    switch (state()) {
    case READ_ID:
        mMessageId = input.readUnsignedByte();
        checkpoint(DecoderState.READ_LENGTH);
        break;
    case READ_LENGTH:
        mMessageLength = input.readUnsignedShort();
        checkpoint(DecoderState.READ_CONTENT);
        break;
    case READ_CONTENT:
        output.add(mLookupService.decode(mMessageId, input.readBytes(mMessageLength)));
        checkpoint(DecoderState.READ_ID);
    }
}

---

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