Bharat saraswal | 3077717 | 2015-08-21 15:51:10 +0530 | [diff] [blame] | 1 | /*
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| 2 | * Copyright 2015 Open Networking Laboratory
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| 3 | *
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| 4 | * Licensed under the Apache License, Version 2.0 (the "License");
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| 5 | * you may not use this file except in compliance with the License.
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| 6 | * You may obtain a copy of the License at
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| 7 | *
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| 8 | * http://www.apache.org/licenses/LICENSE-2.0
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| 9 | *
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| 10 | * Unless required by applicable law or agreed to in writing, software
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| 11 | * distributed under the License is distributed on an "AS IS" BASIS,
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| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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| 13 | * See the License for the specific language governing permissions and
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| 14 | * limitations under the License.
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| 15 | */
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| 16 |
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| 17 | package org.onosproject.pcepio.types;
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| 18 |
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| 19 | import java.util.Objects;
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| 20 |
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| 21 | import org.jboss.netty.buffer.ChannelBuffer;
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| 22 | import org.onosproject.pcepio.protocol.PcepVersion;
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| 23 | import org.slf4j.Logger;
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| 24 | import org.slf4j.LoggerFactory;
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| 25 |
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| 26 | import com.google.common.base.MoreObjects;
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| 27 | import com.google.common.base.MoreObjects.ToStringHelper;
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| 28 |
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| 29 | /**
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| 30 | * NexthopIPv6addressTlv provides Ipv6 address of next hop.
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| 31 | */
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| 32 | public class NexthopIPv6addressTlv implements PcepValueType {
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| 33 |
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| 34 | /*
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| 35 | Reference: draft-zhao-pce-pcep-extension-for-pce-controller-01.
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| 36 |
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| 37 | 0 1 2 3
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| 38 | 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
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| 39 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| 40 | | Type=TBD | Length = 20 |
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| 41 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| 42 | | |
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| 43 | // nexthop IPv6 address (16 bytes) //
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| 44 | | |
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| 45 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| 46 |
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| 47 | NEXTHOP-IPV6-ADDRESS TLV:
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| 48 |
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| 49 | */
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| 50 | protected static final Logger log = LoggerFactory.getLogger(NexthopIPv6addressTlv.class);
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| 51 |
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| 52 | public static final short TYPE = 100; //to be defined
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| 53 | //Length is header + value
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| 54 | public static final short LENGTH = 20;
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| 55 | public static final short VALUE_LENGTH = 16;
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| 56 |
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| 57 | private static final byte[] NONE_VAL = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
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| 58 | public static final NexthopIPv6addressTlv NONE = new NexthopIPv6addressTlv(NONE_VAL);
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| 59 |
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| 60 | private static final byte[] NO_MASK_VAL = {(byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF,
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| 61 | (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF,
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| 62 | (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF };
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| 63 | public static final NexthopIPv6addressTlv NO_MASK = new NexthopIPv6addressTlv(NO_MASK_VAL);
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| 64 | public static final NexthopIPv6addressTlv FULL_MASK = NONE;
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| 65 |
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| 66 | private final byte[] rawValue;
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| 67 |
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| 68 | /**
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| 69 | * Constructor to initialize IP address for next hop IPv6 address tlv.
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| 70 | *
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| 71 | * @param rawValue value of Next hop ipAddress
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| 72 | */
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| 73 | public NexthopIPv6addressTlv(byte[] rawValue) {
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| 74 | log.debug("NexthopIPv6addressTlv");
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| 75 | this.rawValue = rawValue;
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| 76 | }
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| 77 |
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| 78 | /**
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| 79 | * Creates next hop IPv6 address tlv.
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| 80 | *
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| 81 | * @param raw value of Next hop ipAddress
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| 82 | * @return object of NexthopIPv6addressTlv
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| 83 | */
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| 84 | //logic to be checked
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| 85 | public static NexthopIPv6addressTlv of(final byte[] raw) {
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| 86 | //check NONE_VAL
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| 87 | boolean bFoundNONE = true;
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| 88 | //value starts from 3rd byte.
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| 89 | for (int i = 5; i < 20; ++i) {
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| 90 | if (NONE_VAL[i] != raw[i]) {
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| 91 | bFoundNONE = false;
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| 92 | }
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| 93 | }
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| 94 |
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| 95 | if (bFoundNONE) {
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| 96 | return NONE;
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| 97 | }
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| 98 |
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| 99 | //check NO_MASK_VAL
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| 100 | boolean bFoundNoMask = true;
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| 101 | //value starts from 3rd byte.
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| 102 | for (int i = 5; i < 20; ++i) {
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| 103 | if (0xFF != raw[i]) {
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| 104 | bFoundNoMask = false;
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| 105 | }
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| 106 | }
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| 107 | if (bFoundNoMask) {
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| 108 | return NO_MASK;
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| 109 | }
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| 110 | return new NexthopIPv6addressTlv(raw);
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| 111 | }
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| 112 |
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| 113 | /**
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| 114 | * Returns next hop IPv6 address.
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| 115 | *
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| 116 | * @return next hop IPv6 address
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| 117 | */
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| 118 | public byte[] getBytes() {
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| 119 | return rawValue;
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| 120 | }
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| 121 |
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| 122 | @Override
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| 123 | public PcepVersion getVersion() {
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| 124 | return PcepVersion.PCEP_1;
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| 125 | }
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| 126 |
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| 127 | @Override
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| 128 | public short getType() {
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| 129 | return TYPE;
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| 130 | }
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| 131 |
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| 132 | @Override
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| 133 | public short getLength() {
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| 134 | return LENGTH;
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| 135 | }
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| 136 |
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| 137 | @Override
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| 138 | public int hashCode() {
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| 139 | return Objects.hash(rawValue);
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| 140 | }
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| 141 |
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| 142 | @Override
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| 143 | public boolean equals(Object obj) {
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| 144 | if (this == obj) {
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| 145 | return true;
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| 146 | }
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| 147 | if (obj instanceof NexthopIPv6addressTlv) {
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| 148 | NexthopIPv6addressTlv other = (NexthopIPv6addressTlv) obj;
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| 149 | return Objects.equals(this.rawValue, other.rawValue);
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| 150 | }
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| 151 | return false;
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| 152 | }
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| 153 |
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| 154 | @Override
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| 155 | public int write(ChannelBuffer c) {
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| 156 | int iStartIndex = c.writerIndex();
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| 157 | c.writeShort(TYPE);
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| 158 | c.writeShort(LENGTH);
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| 159 | c.writeBytes(rawValue);
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| 160 | return c.writerIndex() - iStartIndex;
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| 161 | }
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| 162 |
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| 163 | /**
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| 164 | * Reads the channel buffer and returns object of NexthopIPv6addressTlv.
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| 165 | *
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| 166 | * @param c type of channel buffer
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| 167 | * @return object of NexthopIPv6addressTlv
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| 168 | */
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| 169 | public static NexthopIPv6addressTlv read(ChannelBuffer c) {
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| 170 | byte[] yTemp = new byte[20];
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| 171 | c.readBytes(yTemp, 0, 20);
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| 172 | return NexthopIPv6addressTlv.of(yTemp);
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| 173 | }
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| 174 |
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| 175 | @Override
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| 176 | public String toString() {
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| 177 | ToStringHelper toStrHelper = MoreObjects.toStringHelper(getClass());
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| 178 |
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| 179 | toStrHelper.add("Type", TYPE);
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| 180 | toStrHelper.add("Length", LENGTH);
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| 181 |
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| 182 | StringBuffer result = new StringBuffer();
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| 183 | for (byte b : rawValue) {
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| 184 | result.append(String.format("%02X ", b));
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| 185 | }
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| 186 | toStrHelper.add("IpAddress", result);
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| 187 |
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| 188 | return toStrHelper.toString();
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| 189 | }
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| 190 | }
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