Example usage for io.netty.buffer ByteBuf readerIndex

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

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Introduction

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

Prototype

public abstract int readerIndex();

Source Link

Document

Returns the readerIndex of this buffer.

Usage

From source file:com.vethrfolnir.game.network.mu.crypt.MuDecoder.java

License:Open Source License

public static ByteBuf DecodeXor32(ByteBuf buff) {

    if (buff.readerIndex() != 0) {
        log.warn("Buffer must be at index 0!");
        buff.readerIndex(0);// ww  w  . j a v  a 2s  .co  m
    }

    int header = GetHeaderSize(buff);
    int decodedSize = GetDecodedSize(buff);

    buff.readerIndex(header);
    DecXor32(buff, header, decodedSize - header);
    buff.readerIndex(0);
    return buff;
}

From source file:com.vethrfolnir.game.network.mu.crypt.MuDecoder.java

License:Open Source License

/**
 * C3 C4/*from  www .jav a  2s  . co m*/
 * @param buff
 * @return 
 */
public static ByteBuf DecodePacket(ByteBuf buff) {
    if (buff.writerIndex() <= 2) {
        log.fatal("Ambiguous buffer! " + ByteBufUtil.hexDump(buff));
        return null;
    }
    if (buff.readerIndex() != 0) {
        log.warn("Buffer must be at index 0!");
        buff.readerIndex(0);
    }

    int header = GetHeaderSize(buff);
    int packetSize = GetPacketSize(buff);
    int decodedSize = GetDecodedSize(buff);

    int contentSize = packetSize - header;

    //System.out.println("Header[0x"+PrintData.fillHex(buff.getUnsignedByte(0), 2)+"] size: "+GetHeaderSize(buff)+" Packet Size: "+GetPacketSize(buff) +" Content Size: "+contentSize +" Decoded: "+ GetDecodedSize(buff));

    ByteBuf out = alloc.heapBuffer(decodedSize, decodedSize);

    int originalHead = buff.getUnsignedByte(0);

    buff.readerIndex(header);
    int size = DecodeBlock(buff, out, header, contentSize);
    //buff.clear();

    size += header - 1;

    out.writerIndex(0);
    out.writeByte(originalHead);

    switch (originalHead) {
    case 0xc3:
        out.writeByte(size);
        break;
    case 0xC4:
        out.writeByte(size >> 8);
        out.writeByte(size & 0xFF);
        break;
    }

    out.writerIndex(size);
    out.readerIndex(header);

    DecXor32(out, header, size);

    out.readerIndex(0);
    return out;
}

From source file:com.vethrfolnir.game.network.mu.crypt.MuDecoder.java

License:Open Source License

private static void DecXor32(ByteBuf buff, int SizeOfHeader, int Len) {

    for (int i = Len - 1; i > 0; i--) {
        int Buff = buff.getUnsignedByte(buff.readerIndex() + i);
        Buff ^= (Xor32Keys[(i + SizeOfHeader) & 31] ^ buff.getUnsignedByte((buff.readerIndex() + i) - 1));
        buff.setByte(buff.readerIndex() + i, Buff);
    }/*w  w w . j av  a  2  s . c  om*/
}

From source file:com.vethrfolnir.game.network.mu.received.MovedToLocation.java

License:Open Source License

@Override
public void read(MuClient client, ByteBuf buff, Object... params) {
    GameObject entity = client.getEntity();
    Positioning positioning = entity.get(PlayerMapping.Positioning);

    int origianlX = readC(buff);
    int origianlY = readC(buff);

    int offset = buff.readerIndex();
    byte[] data = buff.array();

    int pack = data[offset];
    int stepCount = (pack & 0x0F) + 1; // ... seriously now ...
    int heading = (pack & 0xF0) >> 4;

    int x = origianlX, y = origianlY;

    int TableIndex = 0;
    for (int i = 1; i < stepCount; i++) {
        if ((i % 2) == 1)
            TableIndex = data[offset + (i + 1) / 2] >> 4;
        else//from   w  ww.j av a 2  s  . c  o m
            TableIndex = data[offset + (i + 1) / 2] & 0x0F;

        x += stepDirections[TableIndex * 2];
        y += stepDirections[TableIndex * 2 + 1];
    }

    PlayerState state = entity.get(PlayerMapping.PlayerState);

    // Cheap yet effective, for now
    int distance = (int) MuUtils.distanceSquared(positioning.getX(), positioning.getY(), x, y);

    if (!state.isGM() && (distance > 10 && !positioning.moveFlag())) {
        client.close();
    }

    positioning.moveTo(x, y, heading);
    //System.out.println(getClass().getSimpleName()+": player "+entity.getName()+" "+x+" X "+y+" Y from[x "+origianlX+" y "+origianlY+"]  Heading: "+(heading)+". Step Count: "+stepCount);
}

From source file:com.whizzosoftware.hobson.davisvantage.api.codec.VantageSerialFrameDecoder.java

License:Open Source License

@Override
protected void decode(ChannelHandlerContext channelHandlerContext, ByteBuf buffer, List<Object> list)
        throws Exception {
    int ix = buffer.readerIndex();
    int readableBytes = buffer.readableBytes();
    logger.trace("Readable bytes remaining to read: {}", readableBytes);
    if (readableBytes > 0) {
        if (buffer.readableBytes() >= 6 && buffer.getByte(ix) == 'T' && buffer.getByte(ix + 1) == 'E'
                && buffer.getByte(ix + 2) == 'S' && buffer.getByte(ix + 3) == 'T'
                && buffer.getByte(ix + 4) == '\n' && buffer.getByte(ix + 5) == '\r') {
            buffer.readBytes(6);//from w w  w  .j  av  a  2  s  .com
            logger.trace("Got TEST");
            list.add(new Test());
        } else if (buffer.getByte(ix) == '\r' || buffer.getByte(ix) == '\n') {
            logger.trace("Discarding whitespace: {}", (int) buffer.getByte(ix));
            buffer.readByte();
        } else if (buffer.getByte(ix) == 0x06) {
            buffer.readByte();
            list.add(new ACK());
        } else if (buffer.readableBytes() >= 4 && buffer.getByte(ix) == 'O' && buffer.getByte(ix + 1) == 'K'
                && buffer.getByte(ix + 2) == '\n' && buffer.getByte(ix + 3) == '\r') {
            logger.trace("Got OK");
            buffer.readBytes(4);
            list.add(new OK());
        } else if (buffer.getByte(ix) == 'L' && buffer.getByte(ix + 1) == 'O'
                && buffer.getByte(ix + 2) == 'O') {
            if (buffer.readableBytes() >= 99) {
                logger.trace("Got LOOP");
                byte[] bytes = new byte[99];
                buffer.readBytes(bytes, 0, 99);
                list.add(new LoopResponse(bytes));
            }
        } else if ((buffer.getByte(ix) == 'A' && buffer.getByte(ix + 1) == 'p' && buffer.getByte(ix + 2) == 'r')
                || (buffer.getByte(ix) == 'A' && buffer.getByte(ix + 1) == 'u' && buffer.getByte(ix + 2) == 'g')
                || (buffer.getByte(ix) == 'D' && buffer.getByte(ix + 1) == 'e' && buffer.getByte(ix + 2) == 'c')
                || (buffer.getByte(ix) == 'F' && buffer.getByte(ix + 1) == 'e' && buffer.getByte(ix + 2) == 'b')
                || (buffer.getByte(ix) == 'J' && buffer.getByte(ix + 1) == 'a' && buffer.getByte(ix + 2) == 'n')
                || (buffer.getByte(ix) == 'J' && buffer.getByte(ix + 1) == 'u' && buffer.getByte(ix + 2) == 'l')
                || (buffer.getByte(ix) == 'J' && buffer.getByte(ix + 1) == 'u' && buffer.getByte(ix + 2) == 'n')
                || (buffer.getByte(ix) == 'M' && buffer.getByte(ix + 1) == 'a' && buffer.getByte(ix + 2) == 'r')
                || (buffer.getByte(ix) == 'M' && buffer.getByte(ix + 1) == 'a' && buffer.getByte(ix + 2) == 'y')
                || (buffer.getByte(ix) == 'N' && buffer.getByte(ix + 1) == 'o' && buffer.getByte(ix + 2) == 'v')
                || (buffer.getByte(ix) == 'O' && buffer.getByte(ix + 1) == 'c' && buffer.getByte(ix + 2) == 't')
                || (buffer.getByte(ix) == 'D' && buffer.getByte(ix + 1) == 'e'
                        && buffer.getByte(ix + 2) == 'c')) {
            if (buffer.readableBytes() >= 13) {
                byte[] bytes = new byte[13];
                buffer.readBytes(bytes, 0, 13);
                list.add(new VersionResponse(new String(bytes, 0, 11)));
            }
        } else {
            byte b = buffer.readByte();
            logger.trace("Discarding unknown byte: {}", Hex.encodeHexString(new byte[] { b }));
        }
    }
}

From source file:com.whizzosoftware.hobson.radiora.api.codec.RadioRaFrameDecoder.java

License:Open Source License

@Override
protected Object decode(ChannelHandlerContext ctx, ByteBuf buffer) throws Exception {
    logger.trace("decode: {}", buffer.toString(CharsetUtil.UTF_8));

    ByteBuf frame = (ByteBuf) super.decode(ctx, buffer);

    if (frame != null) {
        // if we receive a single byte frame, it should be a '!'
        if (frame.readableBytes() == 1) {
            byte b = frame.readByte();
            if (b == '!') {
                return null;
            } else {
                throw new CorruptedFrameException("Unexpected single byte frame");
            }/*from  w w w.  j ava2 s  .  c om*/
            // otherwise, we assume it's a command frame
        } else {
            int ix = frame.indexOf(frame.readerIndex(), frame.writerIndex(), (byte) ',');
            if (ix > 0) {
                String cmdName = frame.slice(0, ix).toString(CharsetUtil.UTF_8);

                switch (cmdName) {
                case ZoneMap.TYPE:
                    if (frame.readableBytes() >= ix + 33) {
                        return new ZoneMap(frame.slice(ix + 1, 32).toString(CharsetUtil.UTF_8));
                    } else {
                        throw new CorruptedFrameException("Received invalid zone map size");
                    }

                case LocalZoneChange.TYPE:
                    if (frame.readableBytes() >= ix + 3) {
                        String sZoneNum = frame.slice(ix + 1, 2).toString(CharsetUtil.UTF_8);
                        if (frame.readableBytes() >= ix + 7) {
                            String state = frame.slice(ix + 4, 3).toString(CharsetUtil.UTF_8).trim();
                            try {
                                return new LocalZoneChange(Integer.parseInt(sZoneNum),
                                        LocalZoneChange.State.valueOf(state));
                            } catch (IllegalArgumentException iae) {
                                throw new CorruptedFrameException("Invalid LZC state string");
                            }
                        } else {
                            throw new CorruptedFrameException("Invalid LZC size (state)");
                        }
                    } else {
                        throw new CorruptedFrameException("Invalid LZC size (zoneNum)");
                    }

                case LEDMap.TYPE:
                    if (frame.readableBytes() >= ix + 16) {
                        return new LEDMap(frame.slice(ix + 1, 15).toString(CharsetUtil.UTF_8));
                    } else {
                        throw new CorruptedFrameException("Invalid LED map size");
                    }

                default:
                    throw new DecoderException("Unrecognized command: " + cmdName);
                }
            } else {
                throw new CorruptedFrameException("Invalid frame format (no comma)");
            }
        }
    } else {
        return null;
    }
}

From source file:com.whizzosoftware.wzwave.codec.ZWaveFrameDecoder.java

License:Open Source License

@Override
protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {
    if (logger.isDebugEnabled()) {
        logger.debug("RCVD: {}", ByteUtil.createString(in));
    }/*  www. ja  v a2s. c om*/

    ByteBuf data;

    // if there was data left from the last decode call, create a composite ByteBuf that contains both
    // previous and new data
    if (previousBuf != null) {
        CompositeByteBuf cbuf = Unpooled.compositeBuffer(2);
        cbuf.addComponent(previousBuf.copy());
        cbuf.addComponent(in);
        cbuf.writerIndex(previousBuf.readableBytes() + in.readableBytes());
        data = cbuf;
        // release the data from the previous decode call
        previousBuf.release();
        previousBuf = null;
    } else {
        data = in;
    }

    while (data.isReadable()) {
        // check for single ACK/NAK/CAN
        if (data.readableBytes() == 1 && isSingleByteFrame(data, data.readerIndex())) {
            out.add(createSingleByteFrame(data));
        } else {
            boolean foundFrame = false;
            // search for a valid frame in the data
            for (int searchStartIx = data.readerIndex(); searchStartIx < data.readerIndex()
                    + data.readableBytes(); searchStartIx++) {
                if (data.getByte(searchStartIx) == DataFrame.START_OF_FRAME) {
                    int frameEndIx = scanForFrame(data, searchStartIx);
                    if (frameEndIx > 0) {
                        if (searchStartIx > data.readerIndex() && isSingleByteFrame(data, searchStartIx - 1)) {
                            data.readerIndex(searchStartIx - 1);
                            out.add(createSingleByteFrame(data));
                        } else if (searchStartIx > data.readerIndex()) {
                            data.readerIndex(searchStartIx);
                        }
                        DataFrame df = createDataFrame(data);
                        if (df != null) {
                            out.add(df);
                            data.readByte(); // discard checksum
                            foundFrame = true;
                        } else {
                            logger.debug("Unable to determine frame type");
                        }
                    }
                }
            }
            if (!foundFrame) {
                previousBuf = data.copy();
                break;
            }
        }
    }

    // make sure we read from the input ByteBuf so Netty doesn't throw an exception
    in.readBytes(in.readableBytes());

    logger.trace("Done processing received data: {}", out);
}

From source file:com.whizzosoftware.wzwave.codec.ZWaveFrameDecoder.java

License:Open Source License

private int scanForFrame(ByteBuf data, int startIndex) {
    int readableBytes = data.readableBytes();
    if (data.getByte(startIndex) == DataFrame.START_OF_FRAME
            && startIndex + 1 < data.readerIndex() + readableBytes) {
        byte frameLen = data.getByte(startIndex + 1);
        int checksumIx = startIndex + frameLen + 1;
        if (frameLen > 0 && checksumIx < data.readerIndex() + readableBytes) {
            byte frameChecksum = data.getByte(checksumIx);
            byte checksum = 0;
            for (int i = startIndex + 1; i < checksumIx; i++) {
                checksum ^= data.getByte(i);
            }//from  w w  w . ja  v a2 s .c  o  m
            checksum = (byte) (~checksum);
            if (frameChecksum == checksum) {
                return checksumIx;
            }
        }
    }
    return -1;
}

From source file:com.whizzosoftware.wzwave.codec.ZWaveFrameDecoder.java

License:Open Source License

/**
 * Creates a Z-Wave DataFrame from a ByteBuf.
 *
 * @param buf the buffer to process//from www.  ja v  a 2 s . com
 *
 * @return a DataFrame instance (or null if a valid one wasn't found)
 */
private DataFrame createDataFrame(ByteBuf buf) {
    if (buf.readableBytes() > 3) {
        byte messageType = buf.getByte(buf.readerIndex() + 3);

        switch (messageType) {
        case Version.ID:
            return new Version(buf);
        case MemoryGetId.ID:
            return new MemoryGetId(buf);
        case InitData.ID:
            return new InitData(buf);
        case NodeProtocolInfo.ID:
            return new NodeProtocolInfo(buf);
        case SendData.ID:
            return new SendData(buf);
        case ApplicationCommand.ID:
            return new ApplicationCommand(buf);
        case ApplicationUpdate.ID:
            return new ApplicationUpdate(buf);
        case RequestNodeInfo.ID:
            return new RequestNodeInfo(buf);
        case GetRoutingInfo.ID:
            return new GetRoutingInfo(buf);
        case GetSUCNodeId.ID:
            return new GetSUCNodeId(buf);
        case AddNodeToNetwork.ID:
            return new AddNodeToNetwork(buf);
        case RemoveNodeFromNetwork.ID:
            return new RemoveNodeFromNetwork(buf);
        case SetDefault.ID:
            return new SetDefault(buf);
        }
    }
    return null;
}

From source file:com.whizzosoftware.wzwave.util.ByteUtil.java

License:Open Source License

static public String createString(ByteBuf buf) {
    int length = buf.readableBytes();
    char[] hexChars = new char[length * 5];
    int v;//from w ww. j  av  a2 s  . c  o m
    int i = 0;
    for (int j = buf.readerIndex(); j < buf.readerIndex() + length; j++) {
        v = buf.getByte(j) & 0xFF;
        hexChars[i * 5] = '0';
        hexChars[i * 5 + 1] = 'x';
        hexChars[i * 5 + 2] = hexArray[v >>> 4];
        hexChars[i * 5 + 3] = hexArray[v & 0x0F];
        hexChars[i * 5 + 4] = ' ';
        i++;
    }
    return new String(hexChars);
}