Example usage for io.netty.buffer ByteBuf readRetainedSlice

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

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

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.Gt06FrameDecoder.java

License:Apache License

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

    if (buf.readableBytes() < 5) {
        return null;
    }// w w  w. ja v a2s  .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);//from w  ww .  j a va 2  s .c om
        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.IntellitracFrameDecoder.java

License:Apache License

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

    // Check minimum length
    if (buf.readableBytes() < MESSAGE_MINIMUM_LENGTH) {
        return null;
    }//from w ww .  j  a v  a  2s  .com

    // Check for sync packet
    if (buf.getUnsignedShort(buf.readerIndex()) == 0xFAF8) {
        ByteBuf syncMessage = buf.readRetainedSlice(8);
        if (ctx != null && ctx.channel() != null) {
            ctx.channel().writeAndFlush(new NetworkMessage(syncMessage, ctx.channel().remoteAddress()));
        }
    }

    return super.decode(ctx, buf);
}

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

License:Apache License

private ByteBuf readFrame(ByteBuf buf, int delimiterIndex, int skip) {
    int headerIndex = buf.indexOf(buf.readerIndex() + 1, buf.writerIndex(), (byte) '$');
    if (headerIndex > 0 && headerIndex < delimiterIndex) {
        return buf.readRetainedSlice(headerIndex - buf.readerIndex());
    } else {//  w  w  w  .  j a  v  a 2 s.  co m
        ByteBuf frame = buf.readRetainedSlice(delimiterIndex - buf.readerIndex());
        buf.skipBytes(skip);
        return frame;
    }
}

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

License:Apache License

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

    if (buf.readableBytes() < 80) {
        return null;
    }/*from w  w w.j a va 2 s.  c  om*/

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

    int endIndex = buf.indexOf(spaceIndex, buf.writerIndex(), (byte) ',');
    if (endIndex == -1) {
        return null;
    }

    return buf.readRetainedSlice(endIndex + 1);
}

From source file:org.traccar.protocol.Jt600FrameDecoder.java

License:Apache License

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

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

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

    if (type == '$') {
        boolean longFormat = buf.getUnsignedByte(buf.readerIndex() + 1) == 0x75;
        int length = buf.getUnsignedShort(buf.readerIndex() + (longFormat ? 8 : 7)) + 10;
        if (length <= buf.readableBytes()) {
            return buf.readRetainedSlice(length);
        }
    } else if (type == '(') {
        int endIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) ')');
        if (endIndex != -1) {
            return buf.readRetainedSlice(endIndex + 1);
        }
    } else {
        throw new ParseException(null, 0); // unknown message
    }

    return null;
}

From source file:org.traccar.protocol.L100FrameDecoder.java

License:Apache License

private Object decodeOld(ByteBuf buf) {

    int header = buf.getByte(buf.readerIndex());
    boolean obd = header == 'L' || header == 'H';

    int index;//from  w  w  w  .  ja  v  a 2 s  . c  o m
    if (obd) {
        index = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '*');
    } else {
        index = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) 0x02);
        if (index < 0) {
            index = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) 0x04);
            if (index < 0) {
                return null;
            }
        }
    }

    index += 2; // checksum

    if (buf.writerIndex() >= index) {
        if (!obd) {
            buf.skipBytes(2); // header
        }
        ByteBuf frame = buf.readRetainedSlice(index - buf.readerIndex() - 2);
        buf.skipBytes(2); // footer
        return frame;
    }

    return null;
}

From source file:org.traccar.protocol.L100FrameDecoder.java

License:Apache License

private Object decodeNew(ByteBuf buf) {

    int index = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '@');
    if (index < 0) {
        return null;
    }//from  ww  w  . j av a 2 s.c  o m

    if (buf.writerIndex() >= index + 1) {
        ByteBuf frame = buf.readRetainedSlice(index - buf.readerIndex());
        buf.skipBytes(1); // delimiter
        return frame;
    }

    return null;
}

From source file:org.traccar.protocol.MegastekFrameDecoder.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 a  va  2  s  .c  o m*/

    if (Character.isDigit(buf.getByte(buf.readerIndex()))) {
        int length = 4 + Integer.parseInt(buf.toString(buf.readerIndex(), 4, StandardCharsets.US_ASCII));
        if (buf.readableBytes() >= length) {
            return buf.readRetainedSlice(length);
        }
    } else {
        while (buf.getByte(buf.readerIndex()) == '\r' || buf.getByte(buf.readerIndex()) == '\n') {
            buf.skipBytes(1);
        }
        int delimiter = BufferUtil.indexOf("\r\n", buf);
        if (delimiter == -1) {
            delimiter = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '!');
        }
        if (delimiter != -1) {
            ByteBuf result = buf.readRetainedSlice(delimiter - buf.readerIndex());
            buf.skipBytes(1);
            return result;
        }
    }

    return null;
}

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

License:Apache License

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

    // Strip not '$' (0x24) bytes from the beginning
    while (buf.isReadable() && buf.getUnsignedByte(buf.readerIndex()) != 0x24) {
        buf.readByte();/*from w  ww.ja  va  2 s . co  m*/
    }

    // Check length and return buffer
    if (buf.readableBytes() >= MESSAGE_HEADER) {
        int length = buf.getUnsignedShort(buf.readerIndex() + 2);
        if (buf.readableBytes() >= length) {
            return buf.readRetainedSlice(length);
        }
    }

    return null;
}