| /** |
| * Copyright 2011, Big Switch Networks, Inc. |
| * Originally created by David Erickson & Rob Sherwood, Stanford University |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); you may |
| * not use this file except in compliance with the License. You may obtain |
| * a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| * License for the specific language governing permissions and limitations |
| * under the License. |
| **/ |
| |
| package org.openflow.vendor.nicira; |
| |
| import org.jboss.netty.buffer.ChannelBuffer; |
| import org.openflow.protocol.vendor.OFVendorData; |
| |
| /** |
| * Base class for vendor data corresponding to a Nicira vendor extension. |
| * Nicira vendor data always starts with a 4-byte integer data type value. |
| * |
| * @author Rob Vaterlaus (rob.vaterlaus@bigswitch.com) |
| */ |
| public class OFNiciraVendorData implements OFVendorData { |
| |
| public static final int NX_VENDOR_ID = 0x00002320; |
| /** |
| * The value of the integer data type at the beginning of the vendor data |
| */ |
| protected int dataType; |
| |
| /** |
| * Construct empty (i.e. unspecified data type) Nicira vendor data. |
| */ |
| public OFNiciraVendorData() { |
| } |
| |
| /** |
| * Contruct Nicira vendor data with the specified data type |
| * @param dataType the data type value at the beginning of the vendor data. |
| */ |
| public OFNiciraVendorData(int dataType) { |
| this.dataType = dataType; |
| } |
| |
| /** |
| * Get the data type value at the beginning of the vendor data |
| * @return the integer data type value |
| */ |
| public int getDataType() { |
| return dataType; |
| } |
| |
| /** |
| * Set the data type value |
| * @param dataType the integer data type value at the beginning of the |
| * vendor data. |
| */ |
| public void setDataType(int dataType) { |
| this.dataType = dataType; |
| } |
| |
| /** |
| * Get the length of the vendor data. This implementation will normally |
| * be the superclass for another class that will override this to return |
| * the overall vendor data length. This implementation just returns the |
| * length of the part that includes the 4-byte integer data type value |
| * at the beginning of the vendor data. |
| */ |
| @Override |
| public int getLength() { |
| return 4; |
| } |
| |
| /** |
| * Read the vendor data from the ChannelBuffer |
| * @param data the channel buffer from which we're deserializing |
| * @param length the length to the end of the enclosing message |
| */ |
| @Override |
| public void readFrom(ChannelBuffer data, int length) { |
| dataType = data.readInt(); |
| } |
| |
| /** |
| * Write the vendor data to the ChannelBuffer |
| * @param data the channel buffer to which we're serializing |
| */ |
| @Override |
| public void writeTo(ChannelBuffer data) { |
| data.writeInt(dataType); |
| } |
| } |