Example usage for io.netty.buffer ByteBuf indexOf

Introduction

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

Prototype

public abstract int indexOf(int fromIndex, int toIndex, byte value);

Source Link

Document

Locates the first occurrence of the specified value in this buffer.

Usage

From source file:org.traccar.protocol.Stl060FrameDecoder.java

License:Apache License

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

    ByteBuf result = (ByteBuf) super.decode(ctx, buf);

    if (result != null) {

        int index = result.indexOf(result.readerIndex(), result.writerIndex(), (byte) '$');
        if (index == -1) {
            return result;
        } else {/* www .java  2 s.c  o  m*/
            result.skipBytes(index);
            return result.readRetainedSlice(result.readableBytes());
        }

    }

    return null;
}

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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;
    }/* w ww. ja  v a2s  .co  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;
}

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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;
    }//from   w w w.  j  av  a  2  s .  c om

    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;
}

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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;
    }/*  w w  w .j  a  v  a  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);
}

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

License:Apache License

private int findHeader(ByteBuf buffer) {
    int guessedIndex = buffer.indexOf(buffer.readerIndex(), buffer.writerIndex(), (byte) '$');
    while (guessedIndex != -1 && buffer.writerIndex() - guessedIndex >= 5) {
        if (buffer.getByte(guessedIndex + 4) == ',' && isLetter(buffer.getByte(guessedIndex + 1))
                && isLetter(buffer.getByte(guessedIndex + 2)) && isLetter(buffer.getByte(guessedIndex + 3))) {
            return guessedIndex;
        }/* w  ww  .  j a va  2  s.co  m*/
        guessedIndex = buffer.indexOf(guessedIndex, buffer.writerIndex(), (byte) '$');
    }
    return -1;
}

---

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 .  ja  v a 2  s . co  m

        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.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.j  ava2s .c o m

    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.UproProtocolDecoder.java

License:Apache License

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

    ByteBuf buf = (ByteBuf) msg;

    if (buf.getByte(buf.readerIndex()) != '*') {
        return null;
    }/* ww w.j a va2 s .c  o m*/

    int headerIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '&');
    if (headerIndex < 0) {
        headerIndex = buf.writerIndex();
    }
    String header = buf.readSlice(headerIndex - buf.readerIndex()).toString(StandardCharsets.US_ASCII);

    Parser parser = new Parser(PATTERN_HEADER, header);
    if (!parser.matches()) {
        return null;
    }

    String head = parser.next();
    boolean reply = parser.next().equals("1");

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

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

    String type = parser.next();
    String subtype = parser.next();

    if (reply && channel != null) {
        channel.writeAndFlush(new NetworkMessage("*" + head + "Y" + type + subtype + "#", remoteAddress));
    }

    while (buf.isReadable()) {

        buf.readByte(); // skip delimiter

        byte dataType = buf.readByte();

        int delimiterIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '&');
        if (delimiterIndex < 0) {
            delimiterIndex = buf.writerIndex();
        }

        ByteBuf data = buf.readSlice(delimiterIndex - buf.readerIndex());

        switch (dataType) {
        case 'A':
            decodeLocation(position, data.toString(StandardCharsets.US_ASCII));
            break;
        case 'B':
            position.set(Position.KEY_STATUS, data.toString(StandardCharsets.US_ASCII));
            break;
        case 'C':
            long odometer = 0;
            while (data.isReadable()) {
                odometer <<= 4;
                odometer += data.readByte() - (byte) '0';
            }
            position.set(Position.KEY_ODOMETER, odometer * 2 * 1852 / 3600);
            break;
        case 'F':
            position.setSpeed(Integer.parseInt(data.readSlice(4).toString(StandardCharsets.US_ASCII)) * 0.1);
            break;
        case 'K':
            position.set("statusExtended", data.toString(StandardCharsets.US_ASCII));
            break;
        case 'P':
            if (data.readableBytes() >= 16) {
                position.setNetwork(new Network(
                        CellTower.from(Integer.parseInt(data.readSlice(4).toString(StandardCharsets.US_ASCII)),
                                Integer.parseInt(data.readSlice(4).toString(StandardCharsets.US_ASCII)),
                                Integer.parseInt(data.readSlice(4).toString(StandardCharsets.US_ASCII), 16),
                                Integer.parseInt(data.readSlice(4).toString(StandardCharsets.US_ASCII), 16))));
            }
            break;
        case 'Q':
            position.set("obdPid", ByteBufUtil.hexDump(data));
            break;
        case 'R':
            if (head.startsWith("HQ")) {
                position.set(Position.KEY_RSSI,
                        Integer.parseInt(data.readSlice(2).toString(StandardCharsets.US_ASCII)));
                position.set(Position.KEY_SATELLITES,
                        Integer.parseInt(data.readSlice(2).toString(StandardCharsets.US_ASCII)));
            } else {
                position.set("odbTravel", ByteBufUtil.hexDump(data));
            }
            break;
        case 'S':
            position.set("obdTraffic", ByteBufUtil.hexDump(data));
            break;
        case 'T':
            position.set(Position.KEY_BATTERY_LEVEL,
                    Integer.parseInt(data.readSlice(2).toString(StandardCharsets.US_ASCII)));
            break;
        case 'V':
            position.set(Position.KEY_POWER,
                    Integer.parseInt(data.readSlice(4).toString(StandardCharsets.US_ASCII)) * 0.1);
            break;
        default:
            break;
        }

    }

    if (position.getLatitude() != 0 && position.getLongitude() != 0) {
        return position;
    }

    return null;
}

---

From source file:org.traccar.protocol.Vt200FrameDecoder.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) ')') + 1;
    if (endIndex > 0) {

        ByteBuf frame = Unpooled.buffer();

        while (buf.readerIndex() < endIndex) {
            int b = buf.readByte();
            if (b == '=') {
                frame.writeByte(buf.readByte() ^ '=');
            } else {
                frame.writeByte(b);//from   ww w.  j a  va2s .c om
            }
        }

        return frame;

    }

    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  ava2 s. co  m
        if (buf.writerIndex() >= endIndex) {
            return buf.readRetainedSlice(endIndex - buf.readerIndex());
        }
    }

    return null;
}

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