Sho SHIMIZU | e81e4db | 2015-09-03 09:44:38 -0700 | [diff] [blame] | 1 | /* |
Brian O'Connor | a09fe5b | 2017-08-03 21:12:30 -0700 | [diff] [blame] | 2 | * Copyright 2015-present Open Networking Foundation |
Sho SHIMIZU | e81e4db | 2015-09-03 09:44:38 -0700 | [diff] [blame] | 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | /** |
| 18 | * @author b00295750 |
| 19 | * |
| 20 | */ |
| 21 | package org.onosproject.pcepio.types; |
| 22 | |
| 23 | import java.util.Objects; |
| 24 | |
| 25 | import org.jboss.netty.buffer.ChannelBuffer; |
| 26 | import org.onosproject.pcepio.protocol.PcepVersion; |
| 27 | import org.slf4j.Logger; |
| 28 | import org.slf4j.LoggerFactory; |
| 29 | |
| 30 | import com.google.common.base.MoreObjects; |
| 31 | |
| 32 | /** |
| 33 | * Provides IPv4 Sub Object. |
| 34 | */ |
| 35 | public class IPv4SubObject implements PcepValueType { |
| 36 | |
| 37 | /*Reference : RFC 4874:3.1.1 |
| 38 | * 0 1 2 3 |
| 39 | 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 |
| 40 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 41 | |L| Type | Length | IPv4 address (4 bytes) | |
| 42 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 43 | | IPv4 address (continued) | Prefix Length | Resvd | |
| 44 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 45 | */ |
Ray Milkey | 9c9cde4 | 2018-01-12 14:22:06 -0800 | [diff] [blame] | 46 | private static final Logger log = LoggerFactory.getLogger(IPv4SubObject.class); |
Sho SHIMIZU | e81e4db | 2015-09-03 09:44:38 -0700 | [diff] [blame] | 47 | |
| 48 | public static final byte TYPE = 0x01; |
| 49 | public static final byte LENGTH = 8; |
| 50 | public static final byte VALUE_LENGTH = 6; |
| 51 | public static final byte OBJ_LENGTH = 8; |
| 52 | public static final byte LBIT = 0; |
| 53 | public static final int SHIFT_LBIT_POSITION = 7; |
| 54 | private int ipAddress; |
| 55 | private byte prefixLen; |
| 56 | private byte resvd; |
| 57 | |
| 58 | /** |
| 59 | * Constructor to initialize ipv4 address. |
| 60 | * |
| 61 | * @param ipAddr ipv4 address |
| 62 | */ |
| 63 | public IPv4SubObject(int ipAddr) { |
| 64 | this.ipAddress = ipAddr; |
| 65 | } |
| 66 | |
| 67 | /** |
| 68 | * constructor to initialize ipAddress, prefixLen and resvd. |
| 69 | * |
| 70 | * @param ipAddress ipv4 address |
| 71 | * @param prefixLen prefix length |
| 72 | * @param resvd reserved flags value |
| 73 | */ |
| 74 | public IPv4SubObject(int ipAddress, byte prefixLen, byte resvd) { |
| 75 | this.ipAddress = ipAddress; |
| 76 | this.prefixLen = prefixLen; |
| 77 | this.resvd = resvd; |
| 78 | } |
| 79 | |
| 80 | /** |
| 81 | * Returns a new instance of IPv4SubObject. |
| 82 | * |
| 83 | * @param ipAddress ipv4 address |
| 84 | * @param prefixLen prefix length |
| 85 | * @param resvd reserved flags value |
| 86 | * @return object of IPv4SubObject |
| 87 | */ |
| 88 | public static IPv4SubObject of(int ipAddress, byte prefixLen, byte resvd) { |
| 89 | return new IPv4SubObject(ipAddress, prefixLen, resvd); |
| 90 | } |
| 91 | |
| 92 | /** |
| 93 | * Returns prefixLen of IPv4 IP address. |
| 94 | * |
| 95 | * @return byte value of rawValue |
| 96 | */ |
| 97 | public byte getPrefixLen() { |
| 98 | return prefixLen; |
| 99 | } |
| 100 | |
| 101 | /** |
| 102 | * Returns value of IPv4 IP address. |
| 103 | * |
| 104 | * @return int value of ipv4 address |
| 105 | */ |
| 106 | public int getIpAddress() { |
| 107 | return ipAddress; |
| 108 | } |
| 109 | |
| 110 | @Override |
| 111 | public PcepVersion getVersion() { |
| 112 | return PcepVersion.PCEP_1; |
| 113 | } |
| 114 | |
| 115 | @Override |
| 116 | public short getType() { |
| 117 | return TYPE; |
| 118 | } |
| 119 | |
| 120 | @Override |
| 121 | public short getLength() { |
| 122 | return LENGTH; |
| 123 | } |
| 124 | |
| 125 | @Override |
| 126 | public int hashCode() { |
| 127 | return Objects.hash(ipAddress, prefixLen, resvd); |
| 128 | } |
| 129 | |
| 130 | @Override |
| 131 | public boolean equals(Object obj) { |
| 132 | if (this == obj) { |
| 133 | return true; |
| 134 | } |
| 135 | if (obj instanceof IPv4SubObject) { |
| 136 | IPv4SubObject other = (IPv4SubObject) obj; |
| 137 | return Objects.equals(this.ipAddress, other.ipAddress) && Objects.equals(this.prefixLen, other.prefixLen) |
| 138 | && Objects.equals(this.resvd, other.resvd); |
| 139 | } |
| 140 | return false; |
| 141 | } |
| 142 | |
| 143 | /** |
| 144 | * Reads the channel buffer and returns object of IPv4SubObject. |
| 145 | * |
| 146 | * @param c type of channel buffer |
| 147 | * @return object of IPv4SubObject |
| 148 | */ |
| 149 | public static PcepValueType read(ChannelBuffer c) { |
| 150 | int ipAddess = c.readInt(); |
| 151 | byte prefixLen = c.readByte(); |
| 152 | byte resvd = c.readByte(); |
| 153 | return new IPv4SubObject(ipAddess, prefixLen, resvd); |
| 154 | } |
| 155 | |
| 156 | @Override |
| 157 | public int write(ChannelBuffer c) { |
| 158 | int iLenStartIndex = c.writerIndex(); |
| 159 | byte bValue = LBIT; |
| 160 | bValue = (byte) (bValue << SHIFT_LBIT_POSITION); |
| 161 | bValue = (byte) (bValue | TYPE); |
| 162 | c.writeByte(bValue); |
| 163 | c.writeByte(OBJ_LENGTH); |
| 164 | c.writeInt(ipAddress); |
| 165 | c.writeByte(prefixLen); |
| 166 | c.writeByte(resvd); |
| 167 | |
| 168 | return c.writerIndex() - iLenStartIndex; |
| 169 | } |
| 170 | |
| 171 | @Override |
| 172 | public String toString() { |
| 173 | return MoreObjects.toStringHelper(getClass()) |
| 174 | .add("Type", TYPE) |
| 175 | .add("Length", LENGTH) |
| 176 | .add("IPv4Address", ipAddress) |
| 177 | .add("PrefixLength", prefixLen) |
| 178 | .toString(); |
| 179 | } |
| 180 | } |