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:org.opendaylight.protocol.util.ByteBufWriteUtil.java

License:Open Source License

/**
 * Writes unsigned 64-bit integer <code>value</code> if not null, otherwise
 * writes zeros to the <code>output</code> ByteBuf. ByteBuf's writerIndex is
 * increased by 8.//w w w  .  jav a  2 s .  c  o m
 *
 * @param value
 *            BigInteger value to be written to the output.
 * @param output
 *            ByteBuf, where value or zeros are written.
 */
public static void writeUnsignedLong(final BigInteger value, final ByteBuf output) {
    if (value != null) {
        output.writeLong(value.longValue());
    } else {
        output.writeZero(LONG_BYTES_LENGTH);
    }
}

From source file:org.opendaylight.protocol.util.ByteBufWriteUtil.java

License:Open Source License

/**
 * Writes IPv4 address if not null, otherwise writes zeros to the
 * <code>output</code> ByteBuf. ByteBuf's writerIndex is increased by 4.
 *
 * @param ipv4Address/*from   w ww  .j a  va  2 s.co  m*/
 *            IPv4 address to be written to the output.
 * @param output
 *            ByteBuf, where ipv4Address or zeros are written.
 */
public static void writeIpv4Address(final Ipv4Address ipv4Address, final ByteBuf output) {
    if (ipv4Address != null) {
        output.writeBytes(Ipv4Util.bytesForAddress(ipv4Address));
    } else {
        output.writeZero(Ipv4Util.IP4_LENGTH);
    }
}

From source file:org.opendaylight.protocol.util.ByteBufWriteUtil.java

License:Open Source License

/**
 * Writes IPv4 prefix if not null, otherwise writes zeros to the
 * <code>output</code> ByteBuf. ByteBuf's writerIndex is increased by 5.
 *
 * @param ipv4Prefix//from w  w w. j  a  v a  2  s.co  m
 *            IPv4 prefix value to be written to the output. Prefix is
 *            written in the last byte.
 * @param output
 *            ByteBuf, where ipv4Prefix or zeros are written.
 */
public static void writeIpv4Prefix(final Ipv4Prefix ipv4Prefix, final ByteBuf output) {
    if (ipv4Prefix != null) {
        output.writeBytes(Ipv4Util.bytesForPrefix(ipv4Prefix));
    } else {
        output.writeZero(IPV4_PREFIX_BYTE_LENGTH);
    }
}

From source file:org.opendaylight.protocol.util.ByteBufWriteUtil.java

License:Open Source License

/**
 * Writes IPv6 address if not null, otherwise writes zeros to the
 * <code>output</code> ByteBuf. ByteBuf's writerIndex is increased by 16.
 *
 * @param ipv6Address/*from w  ww  .j  av a 2s . com*/
 *            IPv6 address to be written to the output.
 * @param output
 *            ByteBuf, where ipv6Address or zeros are written.
 */
public static void writeIpv6Address(final Ipv6Address ipv6Address, final ByteBuf output) {
    if (ipv6Address != null) {
        output.writeBytes(Ipv6Util.bytesForAddress(ipv6Address));
    } else {
        output.writeZero(Ipv6Util.IPV6_LENGTH);
    }
}

From source file:org.opendaylight.protocol.util.ByteBufWriteUtil.java

License:Open Source License

/**
 * Writes IPv6 prefix if not null, otherwise writes zeros to the
 * <code>output</code> ByteBuf. ByteBuf's writerIndex is increased by 17.
 *
 * @param ipv6Prefix// www.  j  a v a2s .  co  m
 *            IPv6 prefix to be written to the output. Prefix is written in
 *            the last byte.
 * @param output
 *            ByteBuf, where ipv6Prefix or zeros are written.
 */
public static void writeIpv6Prefix(final Ipv6Prefix ipv6Prefix, final ByteBuf output) {
    if (ipv6Prefix != null) {
        output.writeBytes(Ipv6Util.bytesForPrefix(ipv6Prefix));
    } else {
        output.writeZero(IPV6_PREFIX_BYTE_LENGTH);
    }
}

From source file:org.opendaylight.protocol.util.ByteBufWriteUtil.java

License:Open Source License

/**
 * Writes Float32 <code>value</code> if not null, otherwise writes zeros to
 * the <code>output</code> ByteBuf. ByteBuf's writerIndex is increased by 4.
 *
 * @param value/*  w ww. j av  a 2  s.co  m*/
 *            Float32 value to be written to the output.
 * @param output
 *            ByteBuf, where value or zeros are written.
 */
public static void writeFloat32(final Float32 value, final ByteBuf output) {
    if (value != null) {
        output.writeBytes(value.getValue());
    } else {
        output.writeZero(FLOAT32_BYTES_LENGTH);
    }
}

From source file:org.opendaylight.protocol.util.ByteBufWriteUtil.java

License:Open Source License

/**
 * Writes BitSet's bits if not null, otherwise writes zeros to the
 * <code>output</code> ByteBuf. ByteBuf's writerIndex is increased by
 * specified length.//from   w w w.j  a va 2 s.  c  o m
 *
 * @param bitSet
 *            BitSet values to be written to the output, starting from left most bit.
 * @param outputLength
 *            Number of bytes to be written, must be greater than 0.
 * @param output
 *            ByteBuf, where bitSet or zeros are written.
 */
public static void writeBitSet(final BitSet bitSet, final int outputLength, final ByteBuf output) {
    Preconditions.checkArgument(outputLength > 0);
    if (bitSet != null) {
        output.writeBytes(ByteArray.bitSetToBytes(bitSet, outputLength));
    } else {
        output.writeZero(outputLength);
    }
}

From source file:org.traccar.protocol.CastelProtocolEncoder.java

License:Apache License

private ByteBuf encodeContent(long deviceId, short type, ByteBuf content) {

    ByteBuf buf = Unpooled.buffer(0);
    String uniqueId = Context.getIdentityManager().getById(deviceId).getUniqueId();

    buf.writeByte('@');
    buf.writeByte('@');

    buf.writeShortLE(2 + 2 + 1 + 20 + 2 + content.readableBytes() + 2 + 2); // length

    buf.writeByte(1); // protocol version

    buf.writeBytes(uniqueId.getBytes(StandardCharsets.US_ASCII));
    buf.writeZero(20 - uniqueId.length());

    buf.writeShort(type);//from w w  w  .  ja v  a2  s .c o m
    buf.writeBytes(content);

    buf.writeShortLE(Checksum.crc16(Checksum.CRC16_X25, buf.nioBuffer()));

    buf.writeByte('\r');
    buf.writeByte('\n');

    return buf;
}

From source file:org.traccar.protocol.CellocatorProtocolDecoder.java

License:Apache License

private void sendReply(Channel channel, SocketAddress remoteAddress, long deviceId, byte packetNumber) {
    if (channel != null) {
        ByteBuf reply = Unpooled.buffer(28);
        reply.writeByte('M');
        reply.writeByte('C');
        reply.writeByte('G');
        reply.writeByte('P');
        reply.writeByte(MSG_SERVER_ACKNOWLEDGE);
        reply.writeIntLE((int) deviceId);
        reply.writeByte(commandCount++);
        reply.writeIntLE(0); // authentication code
        reply.writeByte(0);/*from ww  w.  j  a  va2 s.  c o  m*/
        reply.writeByte(packetNumber);
        reply.writeZero(11);

        byte checksum = 0;
        for (int i = 4; i < 27; i++) {
            checksum += reply.getByte(i);
        }
        reply.writeByte(checksum);

        channel.writeAndFlush(new NetworkMessage(reply, remoteAddress));
    }
}

From source file:ru.jts_dev.authserver.util.Encoder.java

License:Open Source License

public ByteBuf appendChecksum(ByteBuf buf) {
    if (buf.readableBytes() % 4 != 0) {
        throw new IndexOutOfBoundsException("ByteBuf size must be multiply of 4");
    }//w w  w  .  j a v a2  s  .  co  m
    int checksum = 0;
    for (int i = 0; i < buf.readableBytes(); i += 4) {
        checksum ^= buf.getInt(i);
    }

    buf.writeInt(checksum);

    buf.writeZero(4); // for blowfish block

    return buf;
}