001/* 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, 013 * software distributed under the License is distributed on an 014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 015 * KIND, either express or implied. See the License for the 016 * specific language governing permissions and limitations 017 * under the License. 018 * 019 */ 020 021package org.apache.directory.server.dhcp.options.misc; 022 023 024import org.apache.directory.server.dhcp.options.DhcpOption; 025 026 027/** 028 * This option is used by clients and servers to exchange vendor- 029 * specific information. The information is an opaque object of n 030 * octets, presumably interpreted by vendor-specific code on the clients 031 * and servers. The definition of this information is vendor specific. 032 * The vendor is indicated in the vendor class identifier option. 033 * Servers not equipped to interpret the vendor-specific information 034 * sent by a client MUST ignore it (although it may be reported). 035 * Clients which do not receive desired vendor-specific information 036 * SHOULD make an attempt to operate without it, although they may do so 037 * (and announce they are doing so) in a degraded mode. 038 * 039 * If a vendor potentially encodes more than one item of information in 040 * this option, then the vendor SHOULD encode the option using 041 * "Encapsulated vendor-specific options" as described below: 042 * The Encapsulated vendor-specific options field SHOULD be encoded as a 043 * sequence of code/length/value fields of identical syntax to the DHCP 044 * options field with the following exceptions: 045 * 046 * 1) There SHOULD NOT be a "magic cookie" field in the encapsulated 047 * vendor-specific extensions field. 048 * 049 * 2) Codes other than 0 or 255 MAY be redefined by the vendor within 050 * the encapsulated vendor-specific extensions field, but SHOULD 051 * conform to the tag-length-value syntax defined in section 2. 052 * 053 * 3) Code 255 (END), if present, signifies the end of the 054 * encapsulated vendor extensions, not the end of the vendor 055 * extensions field. If no code 255 is present, then the end of 056 * the enclosing vendor-specific information field is taken as the 057 * end of the encapsulated vendor-specific extensions field. 058 * 059 * The code for this option is 43 and its minimum length is 1. 060 * 061 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 062 */ 063public class VendorSpecificInformation extends DhcpOption 064{ 065 /* 066 * @see org.apache.directory.server.dhcp.options.DhcpOption#getTag() 067 */ 068 public byte getTag() 069 { 070 return 43; 071 } 072}