Example usage for io.netty.buffer ByteBuf getUnsignedShortLE

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

  1. HOME
  2. Java
  3. io.netty
  4. io.netty.buffer.*
  5. ByteBuf
  6. getUnsignedShortLE

Introduction

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

Prototype

public abstract int getUnsignedShortLE(int index);

Source Link

Document

Gets an unsigned 16-bit short integer at the specified absolute index in this buffer in Little Endian Byte Order.

Usage

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

License:Apache License

@Override
protected Object decode(ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {

    if (header && buf.readableBytes() >= HANDSHAKE_LENGTH) {
        buf.skipBytes(HANDSHAKE_LENGTH);
        header = false;//from  w  ww  .  j  a v  a  2 s  .  com
    }

    int end = 8; // IMEI

    while (buf.readableBytes() >= end + 2 + 1 + 1 + 1) {
        end += buf.getUnsignedShortLE(buf.readerIndex() + end) + 2;

        if (buf.readableBytes() > end && checksum(buf, end) == buf.getByte(buf.readerIndex() + end)) {
            return buf.readRetainedSlice(end + 1);
        }
    }

    return null;
}

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

License:Apache License

@Override
protected Object decode(ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {

    if (buf.readableBytes() < MESSAGE_MINIMUM_LENGTH) {
        return null;
    }//ww  w .  j av  a2 s . c o  m

    int length = 0;
    int type = buf.getUnsignedByte(4);
    switch (type) {
    case CellocatorProtocolDecoder.MSG_CLIENT_STATUS:
        length = 70;
        break;
    case CellocatorProtocolDecoder.MSG_CLIENT_PROGRAMMING:
        length = 31;
        break;
    case CellocatorProtocolDecoder.MSG_CLIENT_SERIAL_LOG:
        length = 70;
        break;
    case CellocatorProtocolDecoder.MSG_CLIENT_SERIAL:
        if (buf.readableBytes() >= 19) {
            length = 19 + buf.getUnsignedShortLE(16);
        }
        break;
    case CellocatorProtocolDecoder.MSG_CLIENT_MODULAR:
        length = 15 + buf.getUnsignedByte(13);
        break;
    default:
        break;
    }

    if (length > 0 && buf.readableBytes() >= length) {
        return buf.readRetainedSlice(length);
    }

    return null;
}

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

License:Apache License

@Override
protected Object decode(ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {

    if (buf.readableBytes() < 10) {
        return null;
    }//w w w . j  a  v  a 2s. c  om

    int headerLength = buf.getUnsignedByte(buf.readerIndex() + 3);
    int frameLength = buf.getUnsignedShortLE(buf.readerIndex() + 5);

    int length = headerLength + frameLength + (frameLength > 0 ? 2 : 0);

    if (buf.readableBytes() >= length) {
        return buf.readRetainedSlice(length);
    }

    return null;
}

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

License:Apache License

@Override
protected Object decode(ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {

    if (buf.readableBytes() < MESSAGE_MINIMUM_LENGTH) {
        return null;
    }// w  w w .j a  v a2  s  . c om

    int length = buf.getUnsignedShortLE(buf.readerIndex() + 1) & 0x7fff;
    if (buf.readableBytes() >= (length + MESSAGE_MINIMUM_LENGTH)) {
        return buf.readRetainedSlice(length + MESSAGE_MINIMUM_LENGTH);
    }

    return null;
}

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

License:Apache License

@Override
protected Object decode(ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {

    int indexEnd = BufferUtil.indexOf("\r\n", buf);
    if (indexEnd != -1) {
        int indexTilde = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '~');
        if (indexTilde != -1 && indexTilde < indexEnd) {
            int length = buf.getUnsignedShortLE(indexTilde + 1);
            indexEnd = BufferUtil.indexOf("\r\n", buf, indexTilde + 2 + length, buf.writerIndex());
            if (indexEnd == -1) {
                return null;
            }//from  w  ww. j ava2s .  c  o  m
        }
        ByteBuf frame = buf.readRetainedSlice(indexEnd - buf.readerIndex());
        buf.skipBytes(2);
        return frame;
    }
    return null;
}

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

License:Apache License

@Override
protected Object decode(Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {

    ByteBuf buf = (ByteBuf) msg;

    int indexTilde = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '~');

    DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);

    if (deviceSession != null && indexTilde == -1) {
        String bufString = buf.toString(StandardCharsets.US_ASCII);
        Position position = new Position(getProtocolName());
        position.setDeviceId(deviceSession.getDeviceId());

        position.setTime(new Date());
        getLastLocation(position, new Date());
        position.setValid(false);//from  ww  w .jav a 2s  .  c  o m
        position.set(Position.KEY_RESULT, bufString);
        return position;
    }

    if (buf.readableBytes() < HEADER_LENGTH) {
        return null;
    }
    String header = buf.readSlice(HEADER_LENGTH).toString(StandardCharsets.US_ASCII);

    if (header.equals("+RRCB~")) {

        buf.skipBytes(2); // binary length 26
        int deviceId = buf.readUnsignedShortLE();
        deviceSession = getDeviceSession(channel, remoteAddress, String.valueOf(deviceId));
        if (deviceSession == null) {
            return null;
        }
        long unixTime = buf.readUnsignedIntLE();
        if (channel != null) {
            sendResponseCurrent(channel, deviceId, unixTime);
        }
        Position position = new Position(getProtocolName());
        position.setDeviceId(deviceSession.getDeviceId());

        position.setTime(new Date(unixTime * 1000));

        decodeStructure(buf, position);
        return position;

    } else if (header.equals("+DDAT~")) {

        buf.skipBytes(2); // binary length
        int deviceId = buf.readUnsignedShortLE();
        deviceSession = getDeviceSession(channel, remoteAddress, String.valueOf(deviceId));
        if (deviceSession == null) {
            return null;
        }
        byte format = buf.readByte();
        if (format != 4) {
            return null;
        }
        byte nblocks = buf.readByte();
        int packNum = buf.readUnsignedShortLE();
        if (channel != null) {
            sendResponseArchive(channel, deviceId, packNum);
        }
        List<Position> positions = new ArrayList<>();
        while (nblocks > 0) {
            nblocks--;
            long unixTime = buf.readUnsignedIntLE();
            int timeIncrement = buf.getUnsignedShortLE(buf.readerIndex() + 120);
            for (int i = 0; i < 6; i++) {
                if (buf.getUnsignedByte(buf.readerIndex()) != 0xFE) {
                    Position position = new Position(getProtocolName());
                    position.setDeviceId(deviceSession.getDeviceId());
                    position.setTime(new Date((unixTime + i * timeIncrement) * 1000));
                    decodeStructure(buf, position);
                    position.set(Position.KEY_ARCHIVE, true);
                    positions.add(position);
                } else {
                    buf.skipBytes(20); // skip filled 0xFE structure
                }
            }
            buf.skipBytes(2); // increment
        }
        return positions;

    }

    return null;
}

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

License:Apache License

@Override
protected Object decode(ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {

    // Check minimum length
    if (buf.readableBytes() < MESSAGE_HEADER) {
        return null;
    }/*from w w  w. j  av  a  2s.c om*/

    // Check for preamble
    boolean hasPreamble = false;
    if (buf.getUnsignedIntLE(buf.readerIndex()) == PREAMBLE) {
        hasPreamble = true;
    }

    // Check length and return buffer
    int length = buf.getUnsignedShortLE(buf.readerIndex() + 6);
    if (buf.readableBytes() >= length) {
        if (hasPreamble) {
            buf.readUnsignedIntLE();
            length -= 4;
        }
        return buf.readRetainedSlice(length);
    }

    return null;
}

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

License:Apache License

@Override
protected Object decode(ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {

    if (buf.getByte(buf.readerIndex()) == 0x7F) {
        return buf.readRetainedSlice(1); // keep alive
    }/*ww  w  .  ja v  a 2 s . co m*/

    if (ctx != null && flexDataSize == 0) {
        NavisProtocolDecoder protocolDecoder = BasePipelineFactory.getHandler(ctx.pipeline(),
                NavisProtocolDecoder.class);
        if (protocolDecoder != null) {
            flexDataSize = protocolDecoder.getFlexDataSize();
        }
    }

    if (flexDataSize > 0) {

        if (buf.readableBytes() > FLEX_HEADER_LENGTH) {
            int length = 0;
            String type = buf.toString(buf.readerIndex(), 2, StandardCharsets.US_ASCII);
            switch (type) {
            // FLEX 1.0
            case "~A":
                length = flexDataSize * buf.getByte(buf.readerIndex() + FLEX_HEADER_LENGTH) + 1 + 1;
                break;
            case "~T":
                length = flexDataSize + 4 + 1;
                break;
            case "~C":
                length = flexDataSize + 1;
                break;
            // FLEX 2.0 (Extra packages)
            case "~E":
                length++;
                for (int i = 0; i < buf.getByte(buf.readerIndex() + FLEX_HEADER_LENGTH); i++) {
                    if (buf.readableBytes() > FLEX_HEADER_LENGTH + length + 1) {
                        length += buf.getUnsignedShort(length + FLEX_HEADER_LENGTH) + 2;
                    } else {
                        return null;
                    }
                }
                length++;
                break;
            case "~X":
                length = buf.getUnsignedShortLE(buf.readerIndex() + FLEX_HEADER_LENGTH) + 4 + 1;
                break;
            default:
                return null;
            }

            if (buf.readableBytes() >= FLEX_HEADER_LENGTH + length) {
                return buf.readRetainedSlice(buf.readableBytes());
            }
        }

    } else {

        if (buf.readableBytes() < NTCB_HEADER_LENGTH) {
            return null;
        }

        int length = NTCB_HEADER_LENGTH + buf.getUnsignedShortLE(buf.readerIndex() + NTCB_LENGTH_OFFSET);
        if (buf.readableBytes() >= length) {
            return buf.readRetainedSlice(length);
        }

    }

    return null;
}

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

License:Apache License

@Override
protected Object decode(ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {

    int length = 6;

    if (buf.readableBytes() >= length) {

        int type = buf.getUnsignedByte(buf.readerIndex() + 2) & 0x0f;

        if (type == OrionProtocolDecoder.MSG_USERLOG && buf.readableBytes() >= length + 5) {

            int index = buf.readerIndex() + 3;
            int count = buf.getUnsignedByte(index) & 0x0f;
            index += 5;//from  w ww  .  j av a2  s.  co  m
            length += 5;

            for (int i = 0; i < count; i++) {
                if (buf.readableBytes() < length) {
                    return null;
                }
                int logLength = buf.getUnsignedByte(index + 1);
                index += logLength;
                length += logLength;
            }

            if (buf.readableBytes() >= length) {
                return buf.readRetainedSlice(length);
            }

        } else if (type == OrionProtocolDecoder.MSG_SYSLOG && buf.readableBytes() >= length + 12) {

            length += buf.getUnsignedShortLE(buf.readerIndex() + 8);
            if (buf.readableBytes() >= length) {
                return buf.readRetainedSlice(length);
            }

        }
    }

    return null;
}

From source file:org.traccar.protocol.Pt502FrameDecoder.java

License:Apache License

@Override
protected Object decode(ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {

    if (buf.readableBytes() < 10) {
        return null;
    }/*from w ww  . ja v a2s.  c om*/

    if (buf.getUnsignedByte(buf.readerIndex()) == 0xbf
            && buf.toString(buf.readerIndex() + BINARY_HEADER, 4, StandardCharsets.US_ASCII).equals("$PHD")) {

        int length = buf.getUnsignedShortLE(buf.readerIndex() + 3);
        if (buf.readableBytes() >= length) {
            buf.skipBytes(BINARY_HEADER);
            ByteBuf result = buf.readRetainedSlice(length - BINARY_HEADER - 2);
            buf.skipBytes(2); // line break
            return result;
        }

    } else {

        if (buf.getUnsignedByte(buf.readerIndex()) == 0xbf) {
            buf.skipBytes(BINARY_HEADER);
        }

        int index = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '\r');
        if (index < 0) {
            index = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '\n');
        }

        if (index > 0) {
            ByteBuf result = buf.readRetainedSlice(index - buf.readerIndex());
            while (buf.isReadable()
                    && (buf.getByte(buf.readerIndex()) == '\r' || buf.getByte(buf.readerIndex()) == '\n')) {
                buf.skipBytes(1);
            }
            return result;
        }

    }

    return null;
}