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:net.epsilony.utils.codec.modbus.handler.ModbusSlaveResponseEncoderTest.java

License:Open Source License

@Test
public void test() {
    ModbusSlaveResponseEncoder encoder = new ModbusSlaveResponseEncoder();
    EmbeddedChannel channel = new EmbeddedChannel(encoder);

    ModbusResponse response = new ModbusResponse() {
        {/*from www.  j a  v  a  2s.c o m*/
            transectionId = 0xabcd;
            unitId = 0x83;
        }

        @Override
        public void writePduCore(ByteBuf out) {
            out.writeShort(0xabcd);
            out.writeShort(0xcdef);
            transectionId++;

        }

        @Override
        public int getPduCoreLength() {
            return 4;
        }

        @Override
        public int getFunctionCode() {
            // TODO Auto-generated method stub
            return 6;
        }
    };

    ByteBuf buf = null;
    for (int i = 0; i < 3; i++) {
        channel.writeOutbound(response);
        buf = (ByteBuf) channel.readOutbound();
        int[] buffer = new int[] { 0xab, 0xcd + i, 0x00, 0x00, 0x00, 0x06, 0x83, 0x06, 0xab, 0xcd, 0xcd, 0xef };
        assertEquals(buffer.length, buf.readableBytes());
        for (int b : buffer) {
            assertEquals(b, buf.readUnsignedByte());
        }
        assertTrue(!buf.isReadable());
        ReferenceCountUtil.release(buf);
    }

    for (int i = 0; i < 3; i++) {
        channel.writeOutbound(response);
    }

    for (int i = 0; i < 3; i++) {
        buf = (ByteBuf) channel.readOutbound();
        int[] buffer = new int[] { 0xab, 0xcd + i + 3, 0x00, 0x00, 0x00, 0x06, 0x83, 0x06, 0xab, 0xcd, 0xcd,
                0xef };
        assertEquals(buffer.length, buf.readableBytes());
        for (int b : buffer) {
            assertEquals(b, buf.readUnsignedByte());
        }
        assertTrue(!buf.isReadable());
        ReferenceCountUtil.release(buf);
    }

    encoder.setWithCheckSum(true);
    for (int i = 0; i < 3; i++) {
        channel.writeOutbound(response);
    }
    for (int i = 0; i < 3; i++) {
        buf = (ByteBuf) channel.readOutbound();
        int[] buffer = new int[] { 0xab, 0xcd + i + 6, 0x00, 0x00, 0x00, 0x06, 0x83, 0x06, 0xab, 0xcd, 0xcd,
                0xef };
        assertEquals(buffer.length, buf.readableBytes() - 2);
        for (int b : buffer) {
            assertEquals(b, buf.readUnsignedByte());
        }
        int calcCrc = Utils.crc(buf, buf.readerIndex() - buffer.length, buffer.length);
        assertEquals(calcCrc, buf.readUnsignedShort());
        assertTrue(!buf.isReadable());
        ReferenceCountUtil.release(buf);
    }
}

---

From source file:net.tomp2p.message.MessageHeaderCodec.java

License:Apache License

/**
 * Decodes a message object.//  w  w w.j  a  va  2s  . c  om
 * 
 * The format looks as follows: 28bit p2p version - 4bit message type - 32bit message id - 8bit message command - 160bit
 * sender id - 16bit sender tcp port - 16bit sender udp port - 160bit recipient id - 32bit content types - 8bit options. It total,
 * the header is of size 58 bytes.
 * 
 * @param buffer
 *            The buffer to decode from
 * @param recipientSocket
 *            The recipient of the message
 * @param senderSocket
 *            The sender of the packet, which has been set in the socket class
 * @return The partial message where only the header fields are set
 */
public static Message decodeHeader(final ByteBuf buffer, final InetSocketAddress recipientSocket,
        final InetSocketAddress senderSocket) {
    LOG.debug("Decode message. Recipient: {}, Sender:{}.", recipientSocket, senderSocket);
    final Message message = new Message();
    final int versionAndType = buffer.readInt();
    message.version(versionAndType >>> 4);
    message.type(Type.values()[(versionAndType & Utils.MASK_0F)]);
    message.messageId(buffer.readInt());
    final int command = buffer.readUnsignedByte();
    message.command((byte) command);
    final Number160 senderID = readID(buffer);
    final int tcpPort = buffer.readUnsignedShort();
    final int udpPort = buffer.readUnsignedShort();
    final Number160 recipientID = readID(buffer);
    message.recipient(new PeerAddress(recipientID, recipientSocket));
    final int contentTypes = buffer.readInt();
    message.hasContent(contentTypes != 0);
    message.contentTypes(decodeContentTypes(contentTypes, message));
    // set the address as we see it, important for port forwarding
    // identification
    final int options = buffer.readUnsignedByte();
    // three bits for the message options, 5 bits for the sender options
    message.options(options & 0x7);
    final int senderOptions = options >>> 3;
    final PeerAddress peerAddress = new PeerAddress(senderID, senderSocket.getAddress(), tcpPort, udpPort,
            senderOptions);
    message.sender(peerAddress);
    message.senderSocket(senderSocket);
    message.recipientSocket(recipientSocket);
    return message;
}

---

From source file:net.tomp2p.peers.PeerSocketAddress.java

License:Apache License

/**
 * Decodes a PeerSocketAddress from a Netty buffer.
 * /*from   ww  w .  ja v  a  2 s  .  co m*/
 * @param buf
 *            The Netty buffer
 * @param isIPv4
 *            Whether the address is IPv4 or IPv6
 * @return the PeerSocketAddress and the new offset
 */
public static PeerSocketAddress create(final ByteBuf buf, final boolean isIPv4) {
    final int tcpPort = buf.readUnsignedShort();
    final int udpPort = buf.readUnsignedShort();

    final InetAddress address;
    final byte[] me;
    if (isIPv4) {
        me = new byte[Utils.IPV4_BYTES];
        buf.readBytes(me);
        address = Utils.inet4FromBytes(me, 0);
    } else {
        me = new byte[Utils.IPV6_BYTES];
        buf.readBytes(me);
        address = Utils.inet6FromBytes(me, 0);
    }
    return new PeerSocketAddress(address, tcpPort, udpPort, buf.readerIndex());
}

---

From source file:net.tomp2p.rpc.SimpleBloomFilter.java

License:Apache License

/**
 * Constructs a SimpleBloomFilter out of existing data.
 * //w ww .ja  v  a2  s.  co  m
 * @param channelBuffer
 *            The byte buffer with the data
 */
public SimpleBloomFilter(final ByteBuf channelBuffer) {
    this.byteArraySize = channelBuffer.readUnsignedShort() - (SIZE_HEADER_ELEMENTS + SIZE_HEADER_LENGTH);
    this.bitArraySize = byteArraySize * Byte.SIZE;
    int expectedElements = channelBuffer.readInt();
    this.expectedElements = expectedElements;
    double hf = (bitArraySize / (double) expectedElements) * Math.log(2.0);
    this.k = (int) Math.ceil(hf);
    if (byteArraySize > 0) {
        byte[] me = new byte[byteArraySize];
        channelBuffer.readBytes(me);
        this.bitSet = RPCUtils.fromByteArray(me);
    } else {
        this.bitSet = new BitSet();
    }
}

---

From source file:org.aotorrent.common.protocol.tracker.UDPAnnounceReply.java

License:Apache License

public UDPAnnounceReply(ByteBuf in) throws ProtocolException, UnknownHostException {
    int length = in.readableBytes();
    int action = in.readInt();
    if (action != UDPAnnounceReply.action || length < 20) {
        throw new ProtocolException("Invalid packet");
    }// ww  w . j a  v a 2 s  .  c om

    transactionId = in.readInt();
    interval = in.readInt();
    in.readInt(); //leechers
    in.readInt(); //seeders

    final int peerCount = in.readableBytes() / 6;

    peers = new ArrayList<>(peerCount);

    for (int i = 0; i < peerCount; i++) {
        int ip = in.readInt();
        int port = in.readUnsignedShort();
        InetAddress inetAddress = InetAddress.getByAddress(Ints.toByteArray(ip));
        peers.add(new InetSocketAddress(inetAddress, port));
    }

}

---

From source file:org.apache.cassandra.transport.CBUtil.java

License:Apache License

public static String readString(ByteBuf cb) {
    try {/*w w  w  .j  av  a2  s  .com*/
        int length = cb.readUnsignedShort();
        return readString(cb, length);
    } catch (IndexOutOfBoundsException e) {
        throw new ProtocolException(
                "Not enough bytes to read an UTF8 serialized string preceded by its 2 bytes length");
    }
}

---

From source file:org.apache.cassandra.transport.CBUtil.java

License:Apache License

public static byte[] readBytes(ByteBuf cb) {
    try {/*from   w ww  . j a v  a 2 s.co m*/
        int length = cb.readUnsignedShort();
        byte[] bytes = new byte[length];
        cb.readBytes(bytes);
        return bytes;
    } catch (IndexOutOfBoundsException e) {
        throw new ProtocolException("Not enough bytes to read a byte array preceded by its 2 bytes length");
    }
}

---

From source file:org.apache.cassandra.transport.CBUtil.java

License:Apache License

public static Map<String, ByteBuffer> readBytesMap(ByteBuf cb) {
    int length = cb.readUnsignedShort();
    Map<String, ByteBuffer> m = new HashMap<>(length);
    for (int i = 0; i < length; i++) {
        String k = readString(cb);
        ByteBuffer v = readValue(cb);
        m.put(k, v);// w  ww .  j  a  v a 2 s.  co  m
    }
    return m;
}

---

From source file:org.apache.cassandra.transport.CBUtil.java

License:Apache License

public static Map<String, String> readStringMap(ByteBuf cb) {
    int length = cb.readUnsignedShort();
    Map<String, String> m = new HashMap<String, String>(length);
    for (int i = 0; i < length; i++) {
        String k = readString(cb);
        String v = readString(cb);
        m.put(k, v);//from   www. ja  v a 2  s.com
    }
    return m;
}

---

From source file:org.apache.cassandra.transport.CBUtil.java

License:Apache License

public static List<ByteBuffer> readValueList(ByteBuf cb, int protocolVersion) {
    int size = cb.readUnsignedShort();
    if (size == 0)
        return Collections.<ByteBuffer>emptyList();

    List<ByteBuffer> l = new ArrayList<ByteBuffer>(size);
    for (int i = 0; i < size; i++)
        l.add(readBoundValue(cb, protocolVersion));
    return l;//  w w  w  .j av  a  2  s  . c  om
}

---

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