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.AtrackFrameDecoder.java

License:Apache License

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

    if (buf.readableBytes() >= 2) {

        if (buf.getUnsignedShort(buf.readerIndex()) == 0xfe02) {

            if (buf.readableBytes() >= KEEPALIVE_LENGTH) {
                return buf.readRetainedSlice(KEEPALIVE_LENGTH);
            }//w  w  w.j a va2s . c o m

        } else if (buf.getUnsignedShort(buf.readerIndex()) == 0x4050
                && buf.getByte(buf.readerIndex() + 2) != ',') {

            if (buf.readableBytes() > 6) {
                int length = buf.getUnsignedShort(buf.readerIndex() + 4) + 4 + 2;
                if (buf.readableBytes() >= length) {
                    return buf.readRetainedSlice(length);
                }
            }

        } else {

            int lengthStart = buf.indexOf(buf.readerIndex() + 3, buf.writerIndex(), (byte) ',') + 1;
            if (lengthStart > 0) {
                int lengthEnd = buf.indexOf(lengthStart, buf.writerIndex(), (byte) ',');
                if (lengthEnd > 0) {
                    int length = lengthEnd + Integer.parseInt(
                            buf.toString(lengthStart, lengthEnd - lengthStart, StandardCharsets.US_ASCII));
                    if (buf.readableBytes() > length && buf.getByte(buf.readerIndex() + length) == '\n') {
                        length += 1;
                    }
                    if (buf.readableBytes() >= length) {
                        return buf.readRetainedSlice(length);
                    }
                }
            } else {
                int endIndex = BufferUtil.indexOf("\r\n", buf);
                if (endIndex > 0) {
                    return buf.readRetainedSlice(endIndex - buf.readerIndex() + 2);
                }
            }

        }

    }

    return null;
}

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

License:Apache License

private static String readString(ByteBuf buf) {
    String result = null;/*from  w  w  w  .  j a  v a2 s . co m*/
    int index = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) 0);
    if (index > buf.readerIndex()) {
        result = buf.readSlice(index - buf.readerIndex()).toString(StandardCharsets.US_ASCII);
    }
    buf.readByte();
    return result;
}

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

License:Apache License

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

    buf.readerIndex(buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) 'E'));

    int endIndex = buf.indexOf(buf.readerIndex() + 1, buf.writerIndex(), (byte) 'E');
    if (endIndex > 0) {
        return buf.readRetainedSlice(endIndex - buf.readerIndex());
    } else {/*  www  .j a va  2 s .  com*/
        return buf.readRetainedSlice(buf.readableBytes()); // assume full frame
    }
}

---

From source file:org.traccar.protocol.Gl200FrameDecoder.java

License:Apache License

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

    if (buf.readableBytes() < MINIMUM_LENGTH) {
        return null;
    }//from   ww  w.j av  a  2  s . c om

    if (isBinary(buf)) {

        int length;
        switch (buf.toString(buf.readerIndex(), 4, StandardCharsets.US_ASCII)) {
        case "+ACK":
            length = buf.getUnsignedByte(buf.readerIndex() + 6);
            break;
        case "+INF":
        case "+BNF":
            length = buf.getUnsignedShort(buf.readerIndex() + 7);
            break;
        case "+HBD":
            length = buf.getUnsignedByte(buf.readerIndex() + 5);
            break;
        case "+CRD":
        case "+BRD":
            length = buf.getUnsignedShort(buf.readerIndex() + 6);
            break;
        default:
            length = buf.getUnsignedShort(buf.readerIndex() + 9);
            break;
        }

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

    } else {

        int endIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '$');
        if (endIndex < 0) {
            endIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) 0);
        }
        if (endIndex > 0) {
            ByteBuf frame = buf.readRetainedSlice(endIndex - buf.readerIndex());
            buf.readByte(); // delimiter
            return frame;
        }

    }

    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  w  w  .  j  a v  a 2  s. 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);/*w  ww  .  ja  v  a2  s.  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.Gt06FrameDecoder.java

License:Apache License

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

    if (buf.readableBytes() < 5) {
        return null;
    }//from  w  w  w.j  a  v  a2  s  .  c o m

    int length = 2 + 2; // head and tail

    if (buf.getByte(buf.readerIndex()) == 0x78) {
        length += 1 + buf.getUnsignedByte(buf.readerIndex() + 2);
    } else {
        length += 2 + buf.getUnsignedShort(buf.readerIndex() + 2);
    }

    if (buf.readableBytes() >= length && buf.getUnsignedShort(buf.readerIndex() + length - 2) == 0x0d0a) {
        return buf.readRetainedSlice(length);
    }

    int endIndex = buf.readerIndex() - 1;
    do {
        endIndex = buf.indexOf(endIndex + 1, buf.writerIndex(), (byte) 0x0d);
        if (endIndex > 0 && buf.writerIndex() > endIndex + 1 && buf.getByte(endIndex + 1) == 0x0a) {
            return buf.readRetainedSlice(endIndex + 2 - buf.readerIndex());
        }
    } while (endIndex > 0);

    return null;
}

---

From source file:org.traccar.protocol.H02FrameDecoder.java

License:Apache License

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

    char marker = (char) buf.getByte(buf.readerIndex());

    while (marker != '*' && marker != '$' && marker != 'X' && buf.readableBytes() > 0) {
        buf.skipBytes(1);// w  w  w  .  j a  v  a 2  s.com
        if (buf.readableBytes() > 0) {
            marker = (char) buf.getByte(buf.readerIndex());
        }
    }

    switch (marker) {
    case '*':

        // Return text message
        int index = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '#');
        if (index != -1) {
            ByteBuf result = buf.readRetainedSlice(index + 1 - buf.readerIndex());
            while (buf.isReadable()
                    && (buf.getByte(buf.readerIndex()) == '\r' || buf.getByte(buf.readerIndex()) == '\n')) {
                buf.readByte(); // skip new line
            }
            return result;
        }

        break;

    case '$':

        if (messageLength == 0) {
            if (buf.readableBytes() == MESSAGE_LONG) {
                messageLength = MESSAGE_LONG;
            } else {
                messageLength = MESSAGE_SHORT;
            }
        }

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

        break;

    case 'X':

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

        break;

    default:

        return null;
    }

    return null;
}

---

From source file:org.traccar.protocol.HuabaoFrameDecoder.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.  j  ava  2s  .  com*/

    int index = buf.indexOf(buf.readerIndex() + 1, buf.writerIndex(), (byte) 0x7e);
    if (index != -1) {
        ByteBuf result = Unpooled.buffer(index + 1 - buf.readerIndex());

        while (buf.readerIndex() <= index) {
            int b = buf.readUnsignedByte();
            if (b == 0x7d) {
                int ext = buf.readUnsignedByte();
                if (ext == 0x01) {
                    result.writeByte(0x7d);
                } else if (ext == 0x02) {
                    result.writeByte(0x7e);
                }
            } else {
                result.writeByte(b);
            }
        }

        return result;
    }

    return null;
}

---

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

License:Apache License

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

    if (buf.readableBytes() < 2) {
        return null;
    }//www .  ja v  a 2s. co m

    int index = buf.indexOf(buf.readerIndex() + 1, buf.writerIndex(), (byte) 0xC0);
    if (index != -1) {
        ByteBuf result = Unpooled.buffer(index + 1 - buf.readerIndex());

        while (buf.readerIndex() <= index) {
            int b = buf.readUnsignedByte();
            if (b == 0xDB) {
                int ext = buf.readUnsignedByte();
                if (ext == 0xDC) {
                    result.writeByte(0xC0);
                } else if (ext == 0xDD) {
                    result.writeByte(0xDB);
                }
            } else {
                result.writeByte(b);
            }
        }

        return result;
    }

    return null;
}

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