karthik1977 | 3c2d04e | 2024-03-22 16:55:55 +0530 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2024-present Open Networking Foundation |
| 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 | package org.onosproject.bgpmonitoring.type; |
| 18 | |
| 19 | |
| 20 | import com.google.common.base.MoreObjects; |
| 21 | |
| 22 | import java.nio.charset.StandardCharsets; |
| 23 | import java.nio.ByteBuffer; |
| 24 | |
| 25 | import org.onlab.packet.BasePacket; |
| 26 | import org.onlab.packet.Deserializer; |
| 27 | |
| 28 | import java.util.function.BiPredicate; |
| 29 | |
| 30 | import org.onosproject.bgpmonitoring.BmpMsg; |
| 31 | import org.onosproject.bgpmonitoring.BmpParseException; |
| 32 | |
| 33 | |
| 34 | public final class BmpInitMsg extends BasePacket implements BmpMsg { |
| 35 | |
| 36 | public static final int MESSAGE_HEADER_MIN_LENGTH = 4; |
| 37 | |
| 38 | private short type; |
| 39 | |
| 40 | private short length; |
| 41 | |
| 42 | private String data; |
| 43 | |
| 44 | private BmpInitMsg(Builder builder) { |
| 45 | this.type = builder.type; |
| 46 | this.length = builder.length; |
| 47 | this.data = builder.data; |
| 48 | } |
| 49 | |
| 50 | /** |
| 51 | * Returns initiation message type. |
| 52 | * |
| 53 | * @return initiation message type |
| 54 | */ |
| 55 | @Override |
| 56 | public short getType() { |
| 57 | return type; |
| 58 | } |
| 59 | |
| 60 | /** |
| 61 | * Returns initiation message length. |
| 62 | * |
| 63 | * @return initiation message length |
| 64 | */ |
| 65 | @Override |
| 66 | public short getLength() { |
| 67 | return length; |
| 68 | } |
| 69 | |
| 70 | /** |
| 71 | * Returns initiation message data. |
| 72 | * |
| 73 | * @return initiation message data |
| 74 | */ |
| 75 | @Override |
| 76 | public String getData() { |
| 77 | return data; |
| 78 | } |
| 79 | |
| 80 | /** |
| 81 | * Data deserializer function for BMP initiation message. |
| 82 | * |
| 83 | * @return data deserializer function |
| 84 | */ |
| 85 | public static Deserializer<BmpInitMsg> deserializer() { |
| 86 | return (data, offset, length) -> { |
| 87 | BiPredicate<ByteBuffer, Integer> isValidBuffer = (b, l) |
| 88 | -> b.hasRemaining() && b.remaining() >= l; |
| 89 | |
| 90 | ByteBuffer bb = ByteBuffer.wrap(data, offset, length); |
| 91 | if (!isValidBuffer.test(bb, MESSAGE_HEADER_MIN_LENGTH)) { |
| 92 | throw new BmpParseException("Invalid bmp initiation message buffer size."); |
| 93 | } |
| 94 | return new Builder().type(bb.getShort()) |
| 95 | .length(bb.getShort()) |
| 96 | .data(bb) |
| 97 | .build(); |
| 98 | }; |
| 99 | } |
| 100 | |
| 101 | @Override |
| 102 | public byte[] serialize() { |
| 103 | throw new UnsupportedOperationException("Not supported yet."); |
| 104 | } |
| 105 | |
| 106 | @Override |
| 107 | public String toString() { |
| 108 | |
| 109 | return MoreObjects.toStringHelper(getClass()) |
| 110 | .add("type", type) |
| 111 | .add("length", length) |
| 112 | .add("data", data) |
| 113 | .toString(); |
| 114 | } |
| 115 | |
| 116 | /** |
| 117 | * Builder for BMP initiation message. |
| 118 | */ |
| 119 | private static class Builder { |
| 120 | |
| 121 | private short type; |
| 122 | |
| 123 | private short length; |
| 124 | |
| 125 | private String data; |
| 126 | |
| 127 | /** |
| 128 | * Setter bmp initiation message type. |
| 129 | * |
| 130 | * @param type bmp initiation message type. |
| 131 | * @return this class builder. |
| 132 | */ |
| 133 | public Builder type(short type) { |
| 134 | this.type = type; |
| 135 | return this; |
| 136 | } |
| 137 | |
| 138 | /** |
| 139 | * Setter bmp initiation message length. |
| 140 | * |
| 141 | * @param length bmp initiation message length. |
| 142 | * @return this class builder. |
| 143 | */ |
| 144 | public Builder length(short length) { |
| 145 | this.length = length; |
| 146 | return this; |
| 147 | } |
| 148 | |
| 149 | /** |
| 150 | * Setter bmp initiation message. |
| 151 | * |
| 152 | * @param bb byte buffer. |
| 153 | * @return this class builder. |
| 154 | */ |
| 155 | public Builder data(ByteBuffer bb) { |
| 156 | if (length != 0 && bb.remaining() > length) { |
| 157 | throw new BmpParseException("Not enough readable bytes"); |
| 158 | } |
| 159 | byte[] dataBytes = new byte[length]; |
| 160 | bb.get(dataBytes); |
| 161 | switch (type) { |
| 162 | case 0: |
| 163 | this.data = new String(dataBytes, StandardCharsets.UTF_8); |
| 164 | break; |
| 165 | case 1: |
| 166 | case 2: |
| 167 | this.data = new String(dataBytes, StandardCharsets.US_ASCII); |
| 168 | break; |
| 169 | default: |
| 170 | this.data = new String(dataBytes, StandardCharsets.UTF_16); |
| 171 | } |
| 172 | return this; |
| 173 | } |
| 174 | |
| 175 | |
| 176 | /** |
| 177 | * Builds bmp initiation message. |
| 178 | * |
| 179 | * @return bmp initiation message. |
| 180 | */ |
| 181 | public BmpInitMsg build() { |
| 182 | return new BmpInitMsg(this); |
| 183 | } |
| 184 | } |
| 185 | } |