Example usage for io.netty.buffer ByteBuf writeZero

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

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Introduction

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

Prototype

public abstract ByteBuf writeZero(int length);

Source Link

Document

Fills this buffer with NUL (0x00) starting at the current writerIndex and increases the writerIndex by the specified length .

Usage

From source file:com.antsdb.saltedfish.server.mysql.PacketEncoder.java

License:Open Source License

/**
 * Add header to finish the full packet/*from  w  ww. ja va  2 s  . co  m*/
 * @param out
 * @param packetSeq
 * @param writeBodyFunc        write packet body function
 */
public static void writePacket(ByteBuf out, byte packetSeq, Callback writeBodyFunc) {
    int start = out.writerIndex();
    out.writeZero(4);
    writeBodyFunc.callback();
    int end = out.writerIndex();
    out.writeByte(0);
    out.writerIndex(start);
    int length = end - start - MySQLPacket.packetHeaderSize;
    BufferUtils.writeLongInt(out, length);
    out.writeByte(packetSeq);
    out.writerIndex(end);
    if (_log.isTraceEnabled()) {
        int readerIndex = out.readerIndex();
        out.readerIndex(start);
        byte[] bytes = new byte[end - start];
        out.readBytes(bytes);
        out.readerIndex(readerIndex);
        String dump = '\n' + UberUtil.hexDump(bytes);
        _log.trace(dump);
    }
}

From source file:com.antsdb.saltedfish.server.mysql.PacketEncoder.java

License:Open Source License

/**
 * /* w w w  .j a v  a  2 s  . co m*/
 * From server to client after command, if no error and result set -- that is,
 * if the command was a query which returned a result set. The Result Set Header
 * Packet is the first of several, possibly many, packets that the server sends
 * for result sets. The order of packets for a result set is:
 * 
 * <pre>
 * (Result Set Header Packet)   the number of columns
 * (Field Packets)              column descriptors
 * (EOF Packet)                 marker: end of Field Packets
 * (Row Data Packets)           row contents
 * (EOF Packet)                 marker: end of Data Packets
 * 
 * Bytes                        Name
 * -----                        ----
 * 1-9   (Length-Coded-Binary)  field_count
 * 1-9   (Length-Coded-Binary)  extra
 * 
 * @see http://forge.mysql.com/wiki/MySQL_Internals_ClientServer_Protocol#Result_Set_Header_Packet
 * </pre>
 * 
 * @param buffer
 * @param meta
 */
public void writeColumnDefBody(ByteBuf buffer, FieldMeta meta) {
    //catalog
    BufferUtils.writeLenString(buffer, "def", this.cs);
    //db, schema
    if (meta.getSourceTable() != null) {
        BufferUtils.writeLenString(buffer, meta.getSourceTable().getNamespace(), this.cs);
    } else {
        BufferUtils.writeLenString(buffer, "", this.cs);
    }
    // table
    BufferUtils.writeLenString(buffer, meta.getTableAlias(), this.cs);
    // orgTable
    if (meta.getSourceTable() != null) {
        BufferUtils.writeLenString(buffer, meta.getSourceTable().getTableName(), this.cs);
    } else {
        BufferUtils.writeLenString(buffer, "", this.cs);
    }
    // col name
    BufferUtils.writeLenString(buffer, meta.getName(), this.cs);
    // col original name
    BufferUtils.writeLenString(buffer, meta.getSourceName(), this.cs);
    // next length 
    buffer.writeByte((byte) 0x0C);
    if (meta.getType() == null) {
        BufferUtils.writeInt(buffer, 0x3f);
        BufferUtils.writeUB4(buffer, 0);
        buffer.writeByte((byte) (FIELD_TYPE_NULL & 0xff));
        buffer.writeByte(0x00);
        buffer.writeByte(0x00);
        buffer.writeByte(0);
    } else if (meta.getType().getJavaType() == Boolean.class) {
        BufferUtils.writeInt(buffer, 0x3f);
        BufferUtils.writeUB4(buffer, meta.getType().getLength());
        buffer.writeByte((byte) (FIELD_TYPE_TINY & 0xff));
        buffer.writeByte(0x00);
        buffer.writeByte(0x00);
        buffer.writeByte(0);
    } else if (meta.getType().getSqlType() == Types.TINYINT) {
        BufferUtils.writeInt(buffer, 0x3f);
        BufferUtils.writeUB4(buffer, meta.getType().getLength());
        buffer.writeByte((byte) (FIELD_TYPE_TINY & 0xff));
        buffer.writeByte(0x00);
        buffer.writeByte(0x00);
        buffer.writeByte((byte) meta.getType().getScale());
    } else if (meta.getType().getJavaType() == String.class) {
        // char set utf8_general_ci  : 0x21
        BufferUtils.writeInt(buffer, this.csidx);
        // length
        BufferUtils.writeUB4(buffer, meta.getType().getLength() * 3);
        // type code
        buffer.writeByte((byte) (FIELD_TYPE_VAR_STRING & 0xff));
        buffer.writeByte(0x00);
        buffer.writeByte(0x00);
        buffer.writeByte(0);
    } else if (meta.getType().getJavaType() == Integer.class) {
        BufferUtils.writeInt(buffer, 0x3f);
        BufferUtils.writeUB4(buffer, 21);
        buffer.writeByte((byte) (FIELD_TYPE_LONG & 0xff));
        buffer.writeByte(0x00);
        buffer.writeByte(0x00);
        buffer.writeByte(0);
    } else if (meta.getType().getJavaType() == Long.class) {
        BufferUtils.writeInt(buffer, 0x3f);
        BufferUtils.writeUB4(buffer, 21);
        buffer.writeByte((byte) (FIELD_TYPE_LONGLONG & 0xff));
        buffer.writeByte(0x00); // signed.
        buffer.writeByte(0x00);
        buffer.writeByte(0);
    } else if (meta.getType().getJavaType() == BigInteger.class) {
        BufferUtils.writeInt(buffer, 0x3f);
        BufferUtils.writeUB4(buffer, meta.getType().getLength());
        buffer.writeByte((byte) (FIELD_TYPE_LONGLONG & 0xff));
        buffer.writeByte(0x00);
        buffer.writeByte(0x00);
        buffer.writeByte(0);
    } else if (meta.getType().getJavaType() == BigDecimal.class) {
        BufferUtils.writeInt(buffer, 0x3f);
        BufferUtils.writeUB4(buffer, meta.getType().getLength());
        buffer.writeByte((byte) (FIELD_TYPE_DECIMAL & 0xff));
        buffer.writeByte(0x00);
        buffer.writeByte(0x00);
        buffer.writeByte((byte) meta.getType().getScale());
    } else if (meta.getType().getJavaType() == Float.class) {
        BufferUtils.writeInt(buffer, 0x3f);
        BufferUtils.writeUB4(buffer, meta.getType().getLength());
        buffer.writeByte((byte) (FIELD_TYPE_FLOAT & 0xff));
        buffer.writeByte(0x00);
        buffer.writeByte(0x00);
        buffer.writeByte((byte) meta.getType().getScale());
    } else if (meta.getType().getJavaType() == Double.class) {
        BufferUtils.writeInt(buffer, 0x3f);
        BufferUtils.writeUB4(buffer, meta.getType().getLength());
        buffer.writeByte((byte) (FIELD_TYPE_DOUBLE & 0xff));
        buffer.writeByte(0x00);
        buffer.writeByte(0x00);
        buffer.writeByte((byte) meta.getType().getScale());
    } else if (meta.getType().getJavaType() == Timestamp.class) {
        BufferUtils.writeInt(buffer, 0x3f);
        BufferUtils.writeUB4(buffer, meta.getType().getLength());
        buffer.writeByte((byte) (FIELD_TYPE_TIMESTAMP & 0xff));
        buffer.writeByte(0x00);
        buffer.writeByte(0x00);
        buffer.writeByte((byte) meta.getType().getScale());
    } else if (meta.getType().getJavaType() == Date.class) {
        BufferUtils.writeInt(buffer, 0x3f);
        BufferUtils.writeUB4(buffer, meta.getType().getLength());
        buffer.writeByte((byte) (FIELD_TYPE_DATE & 0xff));
        buffer.writeByte(0x00);
        buffer.writeByte(0x00);
        buffer.writeByte((byte) meta.getType().getScale());
    } else if (meta.getType().getJavaType() == Time.class) {
        BufferUtils.writeInt(buffer, 0x3f);
        BufferUtils.writeUB4(buffer, meta.getType().getLength());
        buffer.writeByte((byte) (FIELD_TYPE_TIME & 0xff));
        buffer.writeByte(0x00);
        buffer.writeByte(0x00);
        buffer.writeByte((byte) meta.getType().getScale());
    }
    // BLOB return byte[] as its java type
    else if (meta.getType().getJavaType() == byte[].class) {
        BufferUtils.writeInt(buffer, 0x3f);
        BufferUtils.writeUB4(buffer, 2147483647);
        buffer.writeByte((byte) (FIELD_TYPE_BLOB & 0xff));
        // flag for Blob is x90 x00
        buffer.writeByte(0x90);
        buffer.writeByte(0x00);
        buffer.writeByte((byte) meta.getType().getScale());
    } else {
        throw new NotImplementedException("Unsupported data type:" + meta.getType().getJavaType());
    }
    /**
     * need add meta info to specify flag
    if (meta.isNullable() == 1) {
    flags |= 0001;
    }
            
    if (meta.isSigned()) {
    flags |= 0020;
    }
            
    if (meta.isAutoIncrement()) {
    flags |= 0200;
    }
    */
    // filler
    buffer.writeZero(2);
}

From source file:com.antsdb.saltedfish.server.mysql.PacketEncoder.java

License:Open Source License

/**
 * /* w  w w.  j a  v  a2s .c o m*/
 * From server to client during initial handshake.
 * 
 * <pre>
 * Bytes                        Name
 * -----                        ----
 * 1                            protocol_version
 * n (Null-Terminated String)   server_version
 * 4                            thread_id
 * 8                            scramble_buff
 * 1                            (filler) always 0x00
 * 2                            server_capabilities
 * 1                            server_language
 * 2                            server_status
 * 13                           (filler) always 0x00 ...
 * 13                           rest of scramble_buff (4.1)
 * 
 * @see http://forge.mysql.com/wiki/MySQL_Internals_ClientServer_Protocol#Handshake_Initialization_Packet
 * </pre>
 * 
 * @param buffer
 * @param serverVersion
 * @param protocolVersion
 * @param threadId
 * @param capability
 * @param charSet
 * @param status
 */
public static void writeHandshakeBody(ByteBuf buffer, String serverVersion, byte protocolVersion, long threadId,
        int capability, byte charSet, int status) {
    buffer.writeByte(protocolVersion);
    BufferUtils.writeString(buffer, serverVersion);
    BufferUtils.writeUB4(buffer, threadId);
    // seed
    byte[] seed = new byte[] { 0x50, 0x3a, 0x6e, 0x3d, 0x25, 0x40, 0x51, 0x56 };
    buffer.writeBytes(seed);
    buffer.writeByte(0);
    // lower 16 bits of sever capacity
    BufferUtils.writeInt(buffer, capability);
    // serverCharsetIndex
    buffer.writeByte(charSet);
    // server status 
    BufferUtils.writeInt(buffer, status);
    // upper 16 bits of server capacity
    BufferUtils.writeInt(buffer, capability >>> 16);
    // plugin data length
    if ((capability & MysqlServerHandler.CLIENT_PLUGIN_AUTH) != 0) {
        buffer.writeByte(0x15);
    } else {
        buffer.writeByte(0);
    }
    // fill the rest 10 bytes with 0
    buffer.writeZero(10);
    if ((capability & MysqlServerHandler.CLIENT_PLUGIN_AUTH) != 0) {
        // no idea what this means, copied from trace
        buffer.writeBytes(
                new byte[] { 0x73, 0x68, 0x2f, 0x50, 0x27, 0x6f, 0x7a, 0x38, 0x46, 0x38, 0x26, 0x51, 0x00 });
        BufferUtils.writeString(buffer, MysqlServerHandler.AUTH_MYSQL_NATIVE);
    }
}

From source file:com.codnos.dbgp.internal.handlers.DBGpInitHandler.java

License:Apache License

@Override
public void channelActive(final ChannelHandlerContext ctx) {
    byte[] initBytes = initMessage.asString().getBytes(UTF_8);
    String size = String.valueOf(initBytes.length);
    byte[] sizeBytes = size.getBytes(UTF_8);
    final ByteBuf initMessageBuffer = ctx.alloc().buffer(sizeBytes.length + 1 + initBytes.length + 1);
    initMessageBuffer.writeBytes(sizeBytes);
    initMessageBuffer.writeZero(1);
    initMessageBuffer.writeBytes(initBytes);
    initMessageBuffer.writeZero(1);//from   w  ww  .  ja  v  a  2  s  .co m
    ctx.writeAndFlush(initMessageBuffer);
}

From source file:com.codnos.dbgp.internal.handlers.DBGpResponseEncoder.java

License:Apache License

@Override
protected void encode(ChannelHandlerContext ctx, Object msg, ByteBuf byteBuf) throws Exception {
    String message = (String) msg;
    byte[] initBytes = message.getBytes(UTF_8);
    String size = String.valueOf(initBytes.length);
    byte[] sizeBytes = size.getBytes(UTF_8);
    final ByteBuf initMessageBuffer = ctx.alloc().buffer(sizeBytes.length + 1 + initBytes.length + 1);
    initMessageBuffer.writeBytes(sizeBytes);
    initMessageBuffer.writeZero(1);
    initMessageBuffer.writeBytes(initBytes);
    initMessageBuffer.writeZero(1);//from  w  w  w .j a  va2 s .  c o m
    LOGGER.fine("sending response=" + initMessageBuffer.toString(UTF_8));
    ctx.writeAndFlush(initMessageBuffer);
}

From source file:com.digitalpetri.modbus.codec.ModbusTcpCodec.java

License:Apache License

public void encode(ModbusTcpPayload payload, ByteBuf buffer) throws Exception {
    int headerStartIndex = buffer.writerIndex();
    buffer.writeZero(MbapHeader.LENGTH);

    int pduStartIndex = buffer.writerIndex();
    encoder.encode(payload.getModbusPdu(), buffer);
    int pduLength = buffer.writerIndex() - pduStartIndex;

    MbapHeader header = new MbapHeader(payload.getTransactionId(), pduLength + 1, payload.getUnitId());

    int currentWriterIndex = buffer.writerIndex();
    buffer.writerIndex(headerStartIndex);
    MbapHeader.encode(header, buffer);//w  w  w .  jav a 2 s .c om
    buffer.writerIndex(currentWriterIndex);
}

From source file:com.flysoloing.learning.network.netty.binary.MemcacheClientHandler.java

License:Apache License

/**
 * Transforms basic string requests to binary memcache requests
 *///from   ww w  .  j  av  a  2  s.c om
@Override
public void write(ChannelHandlerContext ctx, Object msg, ChannelPromise promise) {
    String command = (String) msg;
    if (command.startsWith("get ")) {
        String keyString = command.substring("get ".length());
        ByteBuf key = Unpooled.wrappedBuffer(keyString.getBytes(CharsetUtil.UTF_8));

        BinaryMemcacheRequest req = new DefaultBinaryMemcacheRequest(key);
        req.setOpcode(BinaryMemcacheOpcodes.GET);

        ctx.write(req, promise);
    } else if (command.startsWith("set ")) {
        String[] parts = command.split(" ", 3);
        if (parts.length < 3) {
            throw new IllegalArgumentException("Malformed Command: " + command);
        }
        String keyString = parts[1];
        String value = parts[2];

        ByteBuf key = Unpooled.wrappedBuffer(keyString.getBytes(CharsetUtil.UTF_8));
        ByteBuf content = Unpooled.wrappedBuffer(value.getBytes(CharsetUtil.UTF_8));
        ByteBuf extras = ctx.alloc().buffer(8);
        extras.writeZero(8);

        BinaryMemcacheRequest req = new DefaultFullBinaryMemcacheRequest(key, extras, content);
        req.setOpcode(BinaryMemcacheOpcodes.SET);

        ctx.write(req, promise);
    } else {
        throw new IllegalStateException("Unknown Message: " + msg);
    }
}

From source file:com.linecorp.armeria.client.endpoint.dns.DnsAddressEndpointGroupTest.java

License:Apache License

private static DnsRecord newCompatibleAddressRecord(String name, String ipV4Addr) {
    final ByteBuf content = Unpooled.buffer();
    content.writeZero(12);
    content.writeBytes(NetUtil.createByteArrayFromIpAddressString(ipV4Addr));
    return new DefaultDnsRawRecord(name, AAAA, 60, content);
}

From source file:com.linecorp.armeria.client.endpoint.dns.DnsAddressEndpointGroupTest.java

License:Apache License

private static DnsRecord newMappedAddressRecord(String name, String ipV4Addr) {
    final ByteBuf content = Unpooled.buffer();
    content.writeZero(10);
    content.writeShort(0xFFFF);//from   w  w  w  . j ava  2 s.c om
    content.writeBytes(NetUtil.createByteArrayFromIpAddressString(ipV4Addr));
    return new DefaultDnsRawRecord(name, AAAA, 60, content);
}

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

License:Apache License

@Test
public void test() throws Exception {
    GetRequest request = new GetRequest(KEY, OpCode.GET, 123, OPAQUE);
    BinaryMemcacheDecoder decoder = new BinaryMemcacheDecoder();

    ByteBuf cb = Unpooled.buffer(30);
    cb.writeByte(0x81);//www  .ja  va2s .  co  m
    cb.writeByte(OpCode.GET);
    cb.writeShort(3);
    cb.writeByte(0);
    cb.writeZero(1);
    cb.writeShort(0);
    cb.writeInt(6);
    cb.writeInt(request.getOpaque());
    cb.writeLong(258);
    cb.writeBytes(KEY.getBytes());
    cb.writeBytes(VALUE.getBytes());

    List<Object> out = Lists.newArrayList();
    decoder.decode(null, cb, out);
    @SuppressWarnings("unchecked")
    List<ResponsePacket> replies = (List<ResponsePacket>) out.get(0);
    request.handle(replies);

    GetResult<byte[]> getResult = request.get();
    assertEquals(258, getResult.getCas());
    assertEquals(VALUE, TRANSCODER.decode(getResult.getValue()));
}