Example usage for io.netty.buffer ByteBuf readRetainedSlice

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

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Introduction

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

Prototype

public abstract ByteBuf readRetainedSlice(int length);

Source Link

Document

Returns a new retained slice of this buffer's sub-region starting at the current readerIndex and increases the readerIndex by the size of the new slice (= length ).

Usage

From source file:org.traccar.protocol.T57FrameDecoder.java

License:Apache License

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

    if (buf.readableBytes() < 10) {
        return null;
    }// ww  w  .  j  av  a2s  .  c o m

    String type = buf.toString(buf.readerIndex() + 5, 2, StandardCharsets.US_ASCII);
    int count = type.equals("F3") ? 12 : 14;

    int index = 0;
    while (index >= 0 && count > 0) {
        index = buf.indexOf(index + 1, buf.writerIndex(), (byte) '#');
        if (index > 0) {
            count -= 1;
        }
    }

    return index > 0 ? buf.readRetainedSlice(index + 1 - buf.readerIndex()) : null;
}

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

License:Apache License

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

    if (buf.readableBytes() < 4) {
        return null;
    }/*ww w .j  av a 2  s .c o  m*/

    long length = buf.getUnsignedIntLE(buf.readerIndex());

    if (length < 1024) {
        if (buf.readableBytes() >= length + 4) {
            buf.readUnsignedIntLE();
            return buf.readRetainedSlice((int) length);
        }
    } else {
        int endIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) 0);
        if (endIndex >= 0) {
            ByteBuf frame = buf.readRetainedSlice(endIndex - buf.readerIndex());
            buf.readByte();
            if (frame.readableBytes() > 0) {
                return frame;
            }
        }
    }

    return null;
}

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

License:Apache License

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

    // Check minimum length
    if (buf.readableBytes() < MESSAGE_MINIMUM_LENGTH) {
        return null;
    }//  w  ww .  java 2 s .  c o  m

    // Read packet
    int length = buf.getUnsignedShort(buf.readerIndex());
    if (length > 0) {
        if (buf.readableBytes() >= (length + 2)) {
            return buf.readRetainedSlice(length + 2);
        }
    } else {
        int dataLength = buf.getInt(buf.readerIndex() + 4);
        if (buf.readableBytes() >= (dataLength + 12)) {
            return buf.readRetainedSlice(dataLength + 12);
        }
    }

    return null;
}

From source file:org.traccar.protocol.Tk102ProtocolDecoder.java

License:Apache License

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

    ByteBuf buf = (ByteBuf) msg;

    buf.skipBytes(1); // header
    int type = buf.readUnsignedByte();
    ByteBuf dataSequence = buf.readSlice(10);
    int length = buf.readUnsignedByte();

    if (type == MSG_LOGIN_REQUEST || type == MSG_LOGIN_REQUEST_2) {

        ByteBuf data = buf.readSlice(length);

        String id;/*from w w w .  j ava 2s  .com*/
        if (type == MSG_LOGIN_REQUEST) {
            id = data.toString(StandardCharsets.US_ASCII);
        } else {
            id = data.copy(1, 15).toString(StandardCharsets.US_ASCII);
        }

        if (getDeviceSession(channel, remoteAddress, id) != null) {
            ByteBuf response = Unpooled.buffer();
            response.writeByte(MODE_GPRS);
            response.writeBytes(data);
            sendResponse(channel, MSG_LOGIN_RESPONSE, dataSequence, response);
        }

    } else if (type == MSG_HEARTBEAT_REQUEST) {

        sendResponse(channel, MSG_HEARTBEAT_RESPONSE, dataSequence, buf.readRetainedSlice(length));

    } else {

        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
        if (deviceSession == null) {
            return null;
        }

        Parser parser = new Parser(PATTERN, buf.readSlice(length).toString(StandardCharsets.US_ASCII));
        if (!parser.matches()) {
            return null;
        }

        Position position = new Position(getProtocolName());
        position.setDeviceId(deviceSession.getDeviceId());

        DateBuilder dateBuilder = new DateBuilder().setTime(parser.nextInt(0), parser.nextInt(0),
                parser.nextInt(0));

        position.setValid(parser.next().equals("A"));
        position.setLatitude(parser.nextCoordinate());
        position.setLongitude(parser.nextCoordinate());
        position.setSpeed(parser.nextDouble(0));

        dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
        position.setTime(dateBuilder.getDate());

        return position;

    }

    return null;
}

From source file:org.traccar.protocol.Tk103FrameDecoder.java

License:Apache License

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

    if (buf.readableBytes() < 2) {
        return null;
    }/*from   w  ww. java 2 s  .  c o m*/

    int frameStartIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '(');
    if (frameStartIndex == -1) {
        buf.clear();
        return null;
    }

    int frameEndIndex, freeTextSymbolCounter;
    for (frameEndIndex = frameStartIndex, freeTextSymbolCounter = 0;; frameEndIndex++) {
        int freeTextIndex = frameEndIndex;
        frameEndIndex = buf.indexOf(frameEndIndex, buf.writerIndex(), (byte) ')');
        if (frameEndIndex == -1) {
            break;
        }
        for (;; freeTextIndex++, freeTextSymbolCounter++) {
            freeTextIndex = buf.indexOf(freeTextIndex, frameEndIndex, (byte) '$');
            if (freeTextIndex == -1 || freeTextIndex >= frameEndIndex) {
                break;
            }
        }
        if (freeTextSymbolCounter % 2 == 0) {
            break;
        }
    }

    if (frameEndIndex == -1) {
        while (buf.readableBytes() > 1024) {
            int discardUntilIndex = buf.indexOf(buf.readerIndex() + 1, buf.writerIndex(), (byte) '(');
            if (discardUntilIndex == -1) {
                buf.clear();
            } else {
                buf.readerIndex(discardUntilIndex);
            }
        }
        return null;
    }

    buf.readerIndex(frameStartIndex);

    return buf.readRetainedSlice(frameEndIndex + 1 - frameStartIndex);
}

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

License:Apache License

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

    int beginIndex = findHeader(buf);

    if (beginIndex >= 0) {

        buf.readerIndex(beginIndex);/*from w w w .  j  av  a  2s  . com*/

        int endIndex = buf.indexOf(beginIndex, buf.writerIndex(), (byte) '\n');

        if (endIndex >= 0) {
            ByteBuf frame = buf.readRetainedSlice(endIndex - beginIndex);
            buf.readByte(); // delimiter
            return frame;
        }

    }

    return null;
}

From source file:org.traccar.protocol.TotemFrameDecoder.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 .j ava2  s.c o  m

    int beginIndex = BufferUtil.indexOf("$$", buf);
    if (beginIndex == -1) {
        return null;
    } else if (beginIndex > buf.readerIndex()) {
        buf.readerIndex(beginIndex);
    }

    int length;

    if (buf.getByte(buf.readerIndex() + 2) == (byte) '0') {
        length = Integer.parseInt(buf.toString(buf.readerIndex() + 2, 4, StandardCharsets.US_ASCII));
    } else {
        length = Integer.parseInt(buf.toString(buf.readerIndex() + 2, 2, StandardCharsets.US_ASCII), 16);
    }

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

    return null;
}

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

License:Apache License

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

    if (buf.readableBytes() < 20) {
        return null;
    }/*from  w  w  w  . jav  a 2s .c  o m*/

    int length;
    if (buf.getUnsignedByte(buf.readerIndex()) == 0x80) {
        length = buf.getUnsignedShortLE(buf.readerIndex() + 6);
    } else {
        length = buf.getUnsignedShort(buf.readerIndex() + 6);
    }

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

    return null;
}

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

License:Apache License

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

    if (buf.readableBytes() < 2) {
        return null;
    }//from   ww w.ja  va  2 s.c om

    if (buf.getUnsignedByte(buf.readerIndex()) == 0xF8) {

        int index = buf.indexOf(buf.readerIndex() + 1, buf.writerIndex(), (byte) 0xF8);
        if (index != -1) {
            ByteBuf result = Unpooled.buffer(index + 1 - buf.readerIndex());

            while (buf.readerIndex() <= index) {
                int b = buf.readUnsignedByte();
                if (b == 0xF7) {
                    int ext = buf.readUnsignedByte();
                    if (ext == 0x00) {
                        result.writeByte(0xF7);
                    } else if (ext == 0x0F) {
                        result.writeByte(0xF8);
                    }
                } else {
                    result.writeByte(b);
                }
            }

            return result;
        }

    } else {

        int index = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '#');
        if (index != -1) {
            return buf.readRetainedSlice(index + 1 - buf.readerIndex());
        }

    }

    return null;
}

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

License:Apache License

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

    int endIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) ')');
    if (endIndex > 0) {
        endIndex += 1 + 3;/*  w w  w  .  j  a v a 2 s. c  o m*/
        if (buf.writerIndex() >= endIndex) {
            return buf.readRetainedSlice(endIndex - buf.readerIndex());
        }
    }

    return null;
}