senthil | 806c858 | 2024-03-22 18:04:51 +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 | /* |
| 18 | 0 1 2 3 |
| 19 | 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 |
| 20 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 21 | | Local Address (16 bytes) | |
| 22 | ~ ~ |
| 23 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 24 | | Local Port | Remote Port | |
| 25 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 26 | | Sent OPEN Message | |
| 27 | ~ ~ |
| 28 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 29 | | Received OPEN Message | |
| 30 | ~ ~ |
| 31 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 32 | | Information (variable) | |
| 33 | ~ ~ |
| 34 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 35 | */ |
| 36 | package org.onosproject.bgpmonitoring.type; |
| 37 | |
| 38 | import org.jboss.netty.buffer.ChannelBuffers; |
| 39 | import com.google.common.base.MoreObjects; |
| 40 | import org.onlab.packet.Deserializer; |
| 41 | import org.onosproject.bgpio.exceptions.BgpParseException; |
| 42 | import org.onosproject.bgpio.protocol.BgpMessage; |
| 43 | import org.onosproject.bgpio.protocol.ver4.BgpMessageVer4; |
| 44 | import org.onosproject.bgpio.types.BgpHeader; |
| 45 | import org.onosproject.bgpmonitoring.PeerUpNotificationMessage; |
| 46 | import org.onosproject.bgpmonitoring.BmpParseException; |
| 47 | import org.onosproject.bgpmonitoring.PerPeer; |
| 48 | |
| 49 | import java.net.InetAddress; |
| 50 | import java.util.Arrays; |
| 51 | import java.util.Objects; |
| 52 | import java.util.function.BiPredicate; |
| 53 | import java.nio.ByteBuffer; |
| 54 | |
| 55 | import org.slf4j.Logger; |
| 56 | import org.slf4j.LoggerFactory; |
| 57 | |
| 58 | import static com.google.common.base.Preconditions.checkState; |
| 59 | |
| 60 | /** |
| 61 | * A message sent to indicate that a peering |
| 62 | * session has come up. The message includes information regarding |
| 63 | * the data exchanged between the peers in their OPEN messages, as |
| 64 | * well as information about the peering TCP session itself. In |
| 65 | * addition to being sent whenever a peer transitions to the |
| 66 | * Established state, a Peer Up Notification is sent for each peer in |
| 67 | * the Established state when the BMP session itself comes up. |
| 68 | * <p> |
| 69 | * Local Address: The local IP address associated with the peering |
| 70 | * TCP session. It is 4 bytes long if an IPv4 address is carried in |
| 71 | * this field, as determined by the V flag (with the 12 most |
| 72 | * significant bytes zero-filled) and 16 bytes long if an IPv6 |
| 73 | * address is carried in this field. |
| 74 | * <p> |
| 75 | * Local Port: The local port number associated with the peering TCP |
| 76 | * session, or 0 if no TCP session actually exists (see Section 8.2). |
| 77 | * <p> |
| 78 | * Remote Port: The remote port number associated with the peering |
| 79 | * TCP session, or 0 if no TCP session actually exists. |
| 80 | * <p> |
| 81 | * Sent OPEN Message: The full OPEN message transmitted by the |
| 82 | * monitored router to its peer. |
| 83 | * <p> |
| 84 | * Received OPEN Message: The full OPEN message received by the |
| 85 | * monitored router from its peer. |
| 86 | * Information: Information about the peer, using the Information TLV |
| 87 | * format. Only the string type is defined in this |
| 88 | * context; it may be repeated. Inclusion of the Information field |
| 89 | * is OPTIONAL. Its presence or absence can be inferred by |
| 90 | * inspection of the Message Length in the common header. |
| 91 | */ |
| 92 | public final class BmpPeerUpNotification extends PeerUpNotificationMessage { |
| 93 | |
| 94 | private static final Logger log = LoggerFactory.getLogger(BmpPeerUpNotification.class); |
| 95 | |
| 96 | private PerPeer perPeer; |
| 97 | |
| 98 | private InetAddress localAddress; |
| 99 | |
| 100 | private int localPort; |
| 101 | |
| 102 | private int remotePort; |
| 103 | |
| 104 | private BgpMessage sentOpenMsg; |
| 105 | |
| 106 | private BgpMessage receivedOpenMsg; |
| 107 | |
| 108 | private byte[] information; |
| 109 | |
| 110 | |
| 111 | private BmpPeerUpNotification(Builder builder) { |
| 112 | this.perPeer = builder.perPeer; |
| 113 | this.localAddress = builder.localAddress; |
| 114 | this.localPort = builder.localPort; |
| 115 | this.remotePort = builder.remotePort; |
| 116 | this.sentOpenMsg = builder.sentOpenMsg; |
| 117 | this.receivedOpenMsg = builder.receivedOpenMsg; |
| 118 | this.information = builder.information; |
| 119 | |
| 120 | |
| 121 | } |
| 122 | |
| 123 | /** |
| 124 | * Returns BMP Peer Header of BMP Message. |
| 125 | * |
| 126 | * @return BMP Peer Header of BMP Message |
| 127 | */ |
| 128 | @Override |
| 129 | public PerPeer getPerPeer() { |
| 130 | return perPeer; |
| 131 | } |
| 132 | |
| 133 | /** |
| 134 | * Returns local ip address. |
| 135 | * |
| 136 | * @return local ip address |
| 137 | */ |
| 138 | public InetAddress getLocalAddress() { |
| 139 | return localAddress; |
| 140 | } |
| 141 | |
| 142 | /** |
| 143 | * Returns local port number. |
| 144 | * |
| 145 | * @return local port number |
| 146 | */ |
| 147 | public int getLocalPort() { |
| 148 | return localPort; |
| 149 | } |
| 150 | |
| 151 | /** |
| 152 | * Returns remote port number. |
| 153 | * |
| 154 | * @return remote port number |
| 155 | */ |
| 156 | public int getRemotePort() { |
| 157 | return remotePort; |
| 158 | } |
| 159 | |
| 160 | /** |
| 161 | * Returns Bgp sent open message. |
| 162 | * |
| 163 | * @return Bgp sent open message |
| 164 | */ |
| 165 | public BgpMessage getSentOpenMsg() { |
| 166 | return sentOpenMsg; |
| 167 | } |
| 168 | |
| 169 | /** |
| 170 | * Returns Bgp received open message. |
| 171 | * |
| 172 | * @return Bgp received open message |
| 173 | */ |
| 174 | public BgpMessage getReceivedOpenMsg() { |
| 175 | return receivedOpenMsg; |
| 176 | } |
| 177 | |
| 178 | /** |
| 179 | * Returns BMP peer information. |
| 180 | * |
| 181 | * @return BMP peer information |
| 182 | */ |
| 183 | public byte[] getInformation() { |
| 184 | return information; |
| 185 | } |
| 186 | |
| 187 | |
| 188 | @Override |
| 189 | public boolean equals(Object o) { |
| 190 | if (this == o) { |
| 191 | return true; |
| 192 | } |
| 193 | if (o == null || getClass() != o.getClass()) { |
| 194 | return false; |
| 195 | } |
| 196 | BmpPeerUpNotification that = (BmpPeerUpNotification) o; |
| 197 | return localPort == that.localPort && |
| 198 | remotePort == that.remotePort && |
| 199 | Objects.equals(localAddress, that.localAddress) && |
| 200 | Objects.equals(sentOpenMsg, that.sentOpenMsg) && |
| 201 | Objects.equals(receivedOpenMsg, that.receivedOpenMsg) && |
| 202 | Arrays.equals(information, that.information) && |
| 203 | Objects.equals(perPeer, that.perPeer); |
| 204 | } |
| 205 | |
| 206 | @Override |
| 207 | public int hashCode() { |
| 208 | int result = Objects.hash(localAddress, localPort, remotePort, sentOpenMsg, |
| 209 | receivedOpenMsg, perPeer); |
| 210 | result = 31 * result + Arrays.hashCode(information); |
| 211 | return result; |
| 212 | } |
| 213 | |
| 214 | @Override |
| 215 | public String toString() { |
| 216 | return MoreObjects.toStringHelper(getClass()) |
| 217 | .add("perPeer", perPeer) |
| 218 | .add("localAddress", localAddress) |
| 219 | .add("localPort", localPort) |
| 220 | .add("remotePort", remotePort) |
| 221 | .add("sentOpenMsg", sentOpenMsg) |
| 222 | .add("receivedOpenMsg", receivedOpenMsg) |
| 223 | .add("information", Arrays.toString(information)) |
| 224 | .toString(); |
| 225 | } |
| 226 | |
| 227 | /** |
| 228 | * Data deserializer function for BMP peer up notification message. |
| 229 | * |
| 230 | * @return data deserializer function |
| 231 | */ |
| 232 | public static Deserializer<BmpPeerUpNotification> deserializer() { |
| 233 | return (data, offset, length) -> { |
| 234 | BiPredicate<ByteBuffer, Integer> isValidBuffer = (b, l) |
| 235 | -> b.hasRemaining() && b.remaining() >= l; |
| 236 | |
| 237 | ByteBuffer bb = ByteBuffer.wrap(data, offset, length); |
| 238 | if (!isValidBuffer.test(bb, PEERUP_NOTIFICATION_HEADER_MIN_LENGTH + |
| 239 | PerPeerPacket.PEER_HEADER_MIN_LENGTH)) { |
| 240 | throw new BmpParseException("Invalid bmp peer up notification message buffer size."); |
| 241 | } |
| 242 | byte[] perPeerBytes = new byte[PerPeerPacket.PEER_HEADER_MIN_LENGTH]; |
| 243 | bb.get(perPeerBytes); |
| 244 | |
| 245 | Builder builder = new Builder() |
| 246 | .perPeer(PerPeerPacket.deserializer().deserialize(perPeerBytes, |
| 247 | 0, PerPeerPacket.PEER_HEADER_MIN_LENGTH)); |
| 248 | |
| 249 | |
| 250 | if (builder.perPeer.isIpv6()) { |
| 251 | builder.localAddress(PerPeerPacket.toInetAddress(IPV6_ADDRS, bb)); |
| 252 | } else { |
| 253 | bb.position(bb.position() + (IPV6_ADDRS - IPV4_ADDRS)); |
| 254 | builder.localAddress(PerPeerPacket.toInetAddress(IPV4_ADDRS, bb)); |
| 255 | } |
| 256 | |
| 257 | builder.localPort(bb.getShort()) |
| 258 | .remotePort(bb.getShort()); |
| 259 | |
| 260 | |
| 261 | if (bb.remaining() < (PADDING_BYTES + BGP_LENGTH_FIELD)) { |
| 262 | throw new BmpParseException("Invalid bmp peer up notification message buffer size."); |
| 263 | } |
| 264 | |
| 265 | bb.position(bb.position() + PADDING_BYTES); |
| 266 | int msgLength = bb.getShort(); |
| 267 | bb.position(bb.position() - (PADDING_BYTES + BGP_LENGTH_FIELD)); |
| 268 | |
| 269 | if (bb.remaining() < msgLength) { |
| 270 | throw new BmpParseException("Not enough readable bytes"); |
| 271 | } |
| 272 | byte[] routeBytes = new byte[msgLength]; |
| 273 | bb.get(routeBytes); |
| 274 | try { |
| 275 | builder.sentOpenMsg(BgpMessageVer4.READER.readFrom(ChannelBuffers.wrappedBuffer(routeBytes), |
| 276 | new BgpHeader())); |
| 277 | } catch (BgpParseException ex) { |
| 278 | throw new BmpParseException(ex); |
| 279 | } |
| 280 | |
| 281 | if (bb.remaining() < (PADDING_BYTES + BGP_LENGTH_FIELD)) { |
| 282 | throw new BmpParseException("Not enough readable bytes"); |
| 283 | } |
| 284 | |
| 285 | bb.position(bb.position() + PADDING_BYTES); |
| 286 | msgLength = bb.getShort(); |
| 287 | bb.position(bb.position() - (PADDING_BYTES + BGP_LENGTH_FIELD)); |
| 288 | |
| 289 | if (bb.remaining() < msgLength) { |
| 290 | throw new BmpParseException("Not enough readable bytes"); |
| 291 | } |
| 292 | routeBytes = new byte[msgLength]; |
| 293 | bb.get(routeBytes); |
| 294 | try { |
| 295 | builder.receivedOpenMsg(BgpMessageVer4.READER.readFrom(ChannelBuffers.wrappedBuffer(routeBytes), |
| 296 | new BgpHeader())); |
| 297 | } catch (BgpParseException ex) { |
| 298 | throw new BmpParseException(ex); |
| 299 | } |
| 300 | |
| 301 | if (bb.remaining() > 0) { |
| 302 | byte[] information = new byte[bb.remaining()]; |
| 303 | bb.get(information); |
| 304 | builder.information(information); |
| 305 | |
| 306 | } |
| 307 | |
| 308 | return builder.build(); |
| 309 | |
| 310 | }; |
| 311 | } |
| 312 | |
| 313 | |
| 314 | /** |
| 315 | * Builder for BMP peer up notification message. |
| 316 | */ |
| 317 | private static class Builder { |
| 318 | |
| 319 | |
| 320 | private PerPeer perPeer; |
| 321 | |
| 322 | private InetAddress localAddress; |
| 323 | |
| 324 | private int localPort; |
| 325 | |
| 326 | private int remotePort; |
| 327 | |
| 328 | private BgpMessage sentOpenMsg; |
| 329 | |
| 330 | private BgpMessage receivedOpenMsg; |
| 331 | |
| 332 | private byte[] information; |
| 333 | |
| 334 | /** |
| 335 | * Setter bmp per peer header. |
| 336 | * |
| 337 | * @param perPeer bmp per peer header. |
| 338 | * @return this class builder. |
| 339 | */ |
| 340 | public Builder perPeer(PerPeer perPeer) { |
| 341 | this.perPeer = perPeer; |
| 342 | return this; |
| 343 | } |
| 344 | |
| 345 | /** |
| 346 | * Setter bgp local address. |
| 347 | * |
| 348 | * @param localAddress bgp local address. |
| 349 | * @return this class builder. |
| 350 | */ |
| 351 | public Builder localAddress(InetAddress localAddress) { |
| 352 | this.localAddress = localAddress; |
| 353 | return this; |
| 354 | } |
| 355 | |
| 356 | |
| 357 | /** |
| 358 | * Setter bgp local port. |
| 359 | * |
| 360 | * @param localPort bgp local port. |
| 361 | * @return this class builder. |
| 362 | */ |
| 363 | public Builder localPort(int localPort) { |
| 364 | this.localPort = localPort; |
| 365 | return this; |
| 366 | } |
| 367 | |
| 368 | /** |
| 369 | * Setter bgp remote port. |
| 370 | * |
| 371 | * @param remotePort bgp remote port. |
| 372 | * @return this class builder. |
| 373 | */ |
| 374 | public Builder remotePort(int remotePort) { |
| 375 | this.remotePort = remotePort; |
| 376 | return this; |
| 377 | } |
| 378 | |
| 379 | /** |
| 380 | * Setter bgp send open message. |
| 381 | * |
| 382 | * @param sentOpenMsg bgp send open message. |
| 383 | * @return this class builder. |
| 384 | */ |
| 385 | public Builder sentOpenMsg(BgpMessage sentOpenMsg) { |
| 386 | this.sentOpenMsg = sentOpenMsg; |
| 387 | return this; |
| 388 | } |
| 389 | |
| 390 | /** |
| 391 | * Setter bgp receive open message. |
| 392 | * |
| 393 | * @param receivedOpenMsg bgp receive open message. |
| 394 | * @return this class builder. |
| 395 | */ |
| 396 | public Builder receivedOpenMsg(BgpMessage receivedOpenMsg) { |
| 397 | this.receivedOpenMsg = receivedOpenMsg; |
| 398 | return this; |
| 399 | } |
| 400 | |
| 401 | /** |
| 402 | * Setter bgp information message. |
| 403 | * |
| 404 | * @param information bgp information message. |
| 405 | * @return this class builder. |
| 406 | */ |
| 407 | public Builder information(byte[] information) { |
| 408 | this.information = information; |
| 409 | return this; |
| 410 | } |
| 411 | |
| 412 | /** |
| 413 | * Checks arguments for bmp peer up notification. |
| 414 | */ |
| 415 | private void checkArguments() { |
| 416 | checkState(perPeer != null, "Invalid bmp per peer in peer up notification message."); |
| 417 | checkState(sentOpenMsg != null, "Invalid bgp send open message."); |
| 418 | checkState(receivedOpenMsg != null, "Invalid bgp receive open message."); |
| 419 | } |
| 420 | |
| 421 | /** |
| 422 | * Builds BMP peer up notification message. |
| 423 | * |
| 424 | * @return BMP peer up notification message. |
| 425 | */ |
| 426 | public BmpPeerUpNotification build() { |
| 427 | checkArguments(); |
| 428 | return new BmpPeerUpNotification(this); |
| 429 | } |
| 430 | } |
| 431 | } |