@Override public OFQueueOpFailedErrorMsg readFrom(ChannelBuffer bb) throws OFParseError { int start = bb.readerIndex(); // fixed value property version == 4 byte version = bb.readByte(); if (version != (byte) 0x4) throw new OFParseError("Wrong version: Expected=OFVersion.OF_13(4), got=" + version); // fixed value property type == 1 byte type = bb.readByte(); if (type != (byte) 0x1) throw new OFParseError("Wrong type: Expected=OFType.ERROR(1), got=" + type); int length = U16.f(bb.readShort()); if (length < MINIMUM_LENGTH) throw new OFParseError( "Wrong length: Expected to be >= " + MINIMUM_LENGTH + ", was: " + length); if (bb.readableBytes() + (bb.readerIndex() - start) < length) { // Buffer does not have all data yet bb.readerIndex(start); return null; } if (logger.isTraceEnabled()) logger.trace("readFrom - length={}", length); long xid = U32.f(bb.readInt()); // fixed value property errType == 9 short errType = bb.readShort(); if (errType != (short) 0x9) throw new OFParseError( "Wrong errType: Expected=OFErrorType.QUEUE_OP_FAILED(9), got=" + errType); OFQueueOpFailedCode code = OFQueueOpFailedCodeSerializerVer13.readFrom(bb); byte[] data = ChannelUtils.readBytes(bb, length - (bb.readerIndex() - start)); OFQueueOpFailedErrorMsgVer13 queueOpFailedErrorMsgVer13 = new OFQueueOpFailedErrorMsgVer13(xid, code, data); if (logger.isTraceEnabled()) logger.trace("readFrom - read={}", queueOpFailedErrorMsgVer13); return queueOpFailedErrorMsgVer13; }