Example usage for io.netty.buffer ByteBuf getUnsignedIntLE

Introduction

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

Prototype

public abstract long getUnsignedIntLE(int index);

Source Link

Document

Gets an unsigned 32-bit integer at the specified absolute index in this buffer in Little Endian Byte Order.

Usage

From source file:org.eclipse.milo.opcua.stack.client.transport.uasc.UascClientMessageHandler.java

License:Open Source License

private void validateChunkHeaders(List<ByteBuf> chunkBuffers) throws UaException {
    ChannelSecurity channelSecurity = secureChannel.getChannelSecurity();
    long currentTokenId = channelSecurity.getCurrentToken().getTokenId().longValue();
    long previousTokenId = channelSecurity.getPreviousToken().map(t -> t.getTokenId().longValue()).orElse(-1L);

    for (ByteBuf chunkBuffer : chunkBuffers) {
        // tokenId starts after messageType + chunkType + messageSize + secureChannelId
        long tokenId = chunkBuffer.getUnsignedIntLE(3 + 1 + 4 + 4);

        if (tokenId != currentTokenId && tokenId != previousTokenId) {
            String message = String.format(
                    "received unknown secure channel token: "
                            + "tokenId=%s currentTokenId=%s previousTokenId=%s",
                    tokenId, currentTokenId, previousTokenId);

            throw new UaException(StatusCodes.Bad_SecureChannelTokenUnknown, message);
        }//from ww w  .j  a va2s.co  m
    }
}

---

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;
    }//ww  w  .j a v a 2 s .c  o  m

    // 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.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  a  va2  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;
}

---