Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 1 | /** |
Ray Milkey | 269ffb9 | 2014-04-03 14:43:30 -0700 | [diff] [blame] | 2 | * Copyright 2011, Big Switch Networks, Inc. |
| 3 | * Originally created by David Erickson, Stanford University |
| 4 | * |
| 5 | * Licensed under the Apache License, Version 2.0 (the "License"); you may |
| 6 | * not use this file except in compliance with the License. You may obtain |
| 7 | * a copy of the License at |
| 8 | * |
| 9 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | * |
| 11 | * Unless required by applicable law or agreed to in writing, software |
| 12 | * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| 13 | * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| 14 | * License for the specific language governing permissions and limitations |
| 15 | * under the License. |
| 16 | **/ |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 17 | |
| 18 | /** |
Ray Milkey | 269ffb9 | 2014-04-03 14:43:30 -0700 | [diff] [blame] | 19 | * |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 20 | */ |
Jonathan Hart | deda0ba | 2014-04-03 11:14:12 -0700 | [diff] [blame] | 21 | package net.onrc.onos.core.packet; |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 22 | |
| 23 | import java.nio.ByteBuffer; |
| 24 | import java.util.Arrays; |
| 25 | import java.util.Collection; |
| 26 | import java.util.HashMap; |
| 27 | import java.util.Map; |
| 28 | |
| 29 | /** |
| 30 | * @author David Erickson (daviderickson@cs.stanford.edu) |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 31 | */ |
| 32 | public class IPv4 extends BasePacket { |
Ray Milkey | 269ffb9 | 2014-04-03 14:43:30 -0700 | [diff] [blame] | 33 | public static final int ADDRESS_LENGTH = 4; |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 34 | public static final byte PROTOCOL_ICMP = 0x1; |
| 35 | public static final byte PROTOCOL_TCP = 0x6; |
| 36 | public static final byte PROTOCOL_UDP = 0x11; |
Pavlin Radoslavov | 608fac3 | 2014-04-09 12:40:24 -0700 | [diff] [blame] | 37 | public static final Map<Byte, Class<? extends IPacket>> PROTOCOL_CLASS_MAP; |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 38 | |
| 39 | static { |
Pavlin Radoslavov | 608fac3 | 2014-04-09 12:40:24 -0700 | [diff] [blame] | 40 | PROTOCOL_CLASS_MAP = new HashMap<Byte, Class<? extends IPacket>>(); |
| 41 | PROTOCOL_CLASS_MAP.put(PROTOCOL_ICMP, ICMP.class); |
| 42 | PROTOCOL_CLASS_MAP.put(PROTOCOL_TCP, TCP.class); |
| 43 | PROTOCOL_CLASS_MAP.put(PROTOCOL_UDP, UDP.class); |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 44 | } |
| 45 | |
| 46 | protected byte version; |
| 47 | protected byte headerLength; |
| 48 | protected byte diffServ; |
| 49 | protected short totalLength; |
| 50 | protected short identification; |
| 51 | protected byte flags; |
| 52 | protected short fragmentOffset; |
| 53 | protected byte ttl; |
| 54 | protected byte protocol; |
| 55 | protected short checksum; |
| 56 | protected int sourceAddress; |
| 57 | protected int destinationAddress; |
| 58 | protected byte[] options; |
| 59 | |
| 60 | protected boolean isTruncated; |
| 61 | |
| 62 | /** |
| 63 | * Default constructor that sets the version to 4. |
| 64 | */ |
| 65 | public IPv4() { |
| 66 | super(); |
| 67 | this.version = 4; |
| 68 | isTruncated = false; |
| 69 | } |
| 70 | |
| 71 | /** |
| 72 | * @return the version |
| 73 | */ |
| 74 | public byte getVersion() { |
| 75 | return version; |
| 76 | } |
| 77 | |
| 78 | /** |
| 79 | * @param version the version to set |
| 80 | */ |
| 81 | public IPv4 setVersion(byte version) { |
| 82 | this.version = version; |
| 83 | return this; |
| 84 | } |
| 85 | |
| 86 | /** |
| 87 | * @return the headerLength |
| 88 | */ |
| 89 | public byte getHeaderLength() { |
| 90 | return headerLength; |
| 91 | } |
| 92 | |
| 93 | /** |
| 94 | * @return the diffServ |
| 95 | */ |
| 96 | public byte getDiffServ() { |
| 97 | return diffServ; |
| 98 | } |
| 99 | |
| 100 | /** |
| 101 | * @param diffServ the diffServ to set |
| 102 | */ |
| 103 | public IPv4 setDiffServ(byte diffServ) { |
| 104 | this.diffServ = diffServ; |
| 105 | return this; |
| 106 | } |
| 107 | |
| 108 | /** |
| 109 | * @return the totalLength |
| 110 | */ |
| 111 | public short getTotalLength() { |
| 112 | return totalLength; |
| 113 | } |
| 114 | |
| 115 | /** |
| 116 | * @return the identification |
| 117 | */ |
| 118 | public short getIdentification() { |
| 119 | return identification; |
| 120 | } |
| 121 | |
| 122 | public boolean isTruncated() { |
| 123 | return isTruncated; |
| 124 | } |
| 125 | |
| 126 | public void setTruncated(boolean isTruncated) { |
| 127 | this.isTruncated = isTruncated; |
| 128 | } |
| 129 | |
| 130 | /** |
| 131 | * @param identification the identification to set |
| 132 | */ |
| 133 | public IPv4 setIdentification(short identification) { |
| 134 | this.identification = identification; |
| 135 | return this; |
| 136 | } |
| 137 | |
| 138 | /** |
| 139 | * @return the flags |
| 140 | */ |
| 141 | public byte getFlags() { |
| 142 | return flags; |
| 143 | } |
| 144 | |
| 145 | /** |
| 146 | * @param flags the flags to set |
| 147 | */ |
| 148 | public IPv4 setFlags(byte flags) { |
| 149 | this.flags = flags; |
| 150 | return this; |
| 151 | } |
| 152 | |
| 153 | /** |
| 154 | * @return the fragmentOffset |
| 155 | */ |
| 156 | public short getFragmentOffset() { |
| 157 | return fragmentOffset; |
| 158 | } |
| 159 | |
| 160 | /** |
| 161 | * @param fragmentOffset the fragmentOffset to set |
| 162 | */ |
| 163 | public IPv4 setFragmentOffset(short fragmentOffset) { |
| 164 | this.fragmentOffset = fragmentOffset; |
| 165 | return this; |
| 166 | } |
| 167 | |
| 168 | /** |
| 169 | * @return the ttl |
| 170 | */ |
| 171 | public byte getTtl() { |
| 172 | return ttl; |
| 173 | } |
| 174 | |
| 175 | /** |
| 176 | * @param ttl the ttl to set |
| 177 | */ |
| 178 | public IPv4 setTtl(byte ttl) { |
| 179 | this.ttl = ttl; |
| 180 | return this; |
| 181 | } |
| 182 | |
| 183 | /** |
| 184 | * @return the protocol |
| 185 | */ |
| 186 | public byte getProtocol() { |
| 187 | return protocol; |
| 188 | } |
| 189 | |
| 190 | /** |
| 191 | * @param protocol the protocol to set |
| 192 | */ |
| 193 | public IPv4 setProtocol(byte protocol) { |
| 194 | this.protocol = protocol; |
| 195 | return this; |
| 196 | } |
| 197 | |
| 198 | /** |
| 199 | * @return the checksum |
| 200 | */ |
| 201 | public short getChecksum() { |
| 202 | return checksum; |
| 203 | } |
| 204 | |
| 205 | /** |
| 206 | * @param checksum the checksum to set |
| 207 | */ |
| 208 | public IPv4 setChecksum(short checksum) { |
| 209 | this.checksum = checksum; |
| 210 | return this; |
| 211 | } |
Ray Milkey | 269ffb9 | 2014-04-03 14:43:30 -0700 | [diff] [blame] | 212 | |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 213 | @Override |
| 214 | public void resetChecksum() { |
| 215 | this.checksum = 0; |
| 216 | super.resetChecksum(); |
| 217 | } |
| 218 | |
| 219 | /** |
| 220 | * @return the sourceAddress |
| 221 | */ |
| 222 | public int getSourceAddress() { |
| 223 | return sourceAddress; |
| 224 | } |
| 225 | |
| 226 | /** |
| 227 | * @param sourceAddress the sourceAddress to set |
| 228 | */ |
| 229 | public IPv4 setSourceAddress(int sourceAddress) { |
| 230 | this.sourceAddress = sourceAddress; |
| 231 | return this; |
| 232 | } |
| 233 | |
| 234 | /** |
| 235 | * @param sourceAddress the sourceAddress to set |
| 236 | */ |
| 237 | public IPv4 setSourceAddress(String sourceAddress) { |
| 238 | this.sourceAddress = IPv4.toIPv4Address(sourceAddress); |
| 239 | return this; |
| 240 | } |
| 241 | |
| 242 | /** |
| 243 | * @return the destinationAddress |
| 244 | */ |
| 245 | public int getDestinationAddress() { |
| 246 | return destinationAddress; |
| 247 | } |
| 248 | |
| 249 | /** |
| 250 | * @param destinationAddress the destinationAddress to set |
| 251 | */ |
| 252 | public IPv4 setDestinationAddress(int destinationAddress) { |
| 253 | this.destinationAddress = destinationAddress; |
| 254 | return this; |
| 255 | } |
| 256 | |
| 257 | /** |
| 258 | * @param destinationAddress the destinationAddress to set |
| 259 | */ |
| 260 | public IPv4 setDestinationAddress(String destinationAddress) { |
| 261 | this.destinationAddress = IPv4.toIPv4Address(destinationAddress); |
| 262 | return this; |
| 263 | } |
| 264 | |
| 265 | /** |
| 266 | * @return the options |
| 267 | */ |
| 268 | public byte[] getOptions() { |
| 269 | return options; |
| 270 | } |
| 271 | |
| 272 | /** |
| 273 | * @param options the options to set |
| 274 | */ |
| 275 | public IPv4 setOptions(byte[] options) { |
Ray Milkey | b29e626 | 2014-04-09 16:02:14 -0700 | [diff] [blame] | 276 | if (options != null && (options.length % 4) > 0) { |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 277 | throw new IllegalArgumentException( |
| 278 | "Options length must be a multiple of 4"); |
Ray Milkey | b29e626 | 2014-04-09 16:02:14 -0700 | [diff] [blame] | 279 | } |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 280 | this.options = options; |
| 281 | return this; |
| 282 | } |
| 283 | |
| 284 | /** |
| 285 | * Serializes the packet. Will compute and set the following fields if they |
| 286 | * are set to specific values at the time serialize is called: |
Ray Milkey | 269ffb9 | 2014-04-03 14:43:30 -0700 | [diff] [blame] | 287 | * -checksum : 0 |
| 288 | * -headerLength : 0 |
| 289 | * -totalLength : 0 |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 290 | */ |
| 291 | public byte[] serialize() { |
| 292 | byte[] payloadData = null; |
| 293 | if (payload != null) { |
| 294 | payload.setParent(this); |
| 295 | payloadData = payload.serialize(); |
| 296 | } |
| 297 | |
| 298 | int optionsLength = 0; |
Ray Milkey | b29e626 | 2014-04-09 16:02:14 -0700 | [diff] [blame] | 299 | if (this.options != null) { |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 300 | optionsLength = this.options.length / 4; |
Ray Milkey | b29e626 | 2014-04-09 16:02:14 -0700 | [diff] [blame] | 301 | } |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 302 | this.headerLength = (byte) (5 + optionsLength); |
| 303 | |
| 304 | this.totalLength = (short) (this.headerLength * 4 + ((payloadData == null) ? 0 |
| 305 | : payloadData.length)); |
| 306 | |
| 307 | byte[] data = new byte[this.totalLength]; |
| 308 | ByteBuffer bb = ByteBuffer.wrap(data); |
| 309 | |
| 310 | bb.put((byte) (((this.version & 0xf) << 4) | (this.headerLength & 0xf))); |
| 311 | bb.put(this.diffServ); |
| 312 | bb.putShort(this.totalLength); |
| 313 | bb.putShort(this.identification); |
| 314 | bb.putShort((short) (((this.flags & 0x7) << 13) | (this.fragmentOffset & 0x1fff))); |
| 315 | bb.put(this.ttl); |
| 316 | bb.put(this.protocol); |
| 317 | bb.putShort(this.checksum); |
| 318 | bb.putInt(this.sourceAddress); |
| 319 | bb.putInt(this.destinationAddress); |
Ray Milkey | b29e626 | 2014-04-09 16:02:14 -0700 | [diff] [blame] | 320 | if (this.options != null) { |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 321 | bb.put(this.options); |
Ray Milkey | b29e626 | 2014-04-09 16:02:14 -0700 | [diff] [blame] | 322 | } |
| 323 | if (payloadData != null) { |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 324 | bb.put(payloadData); |
Ray Milkey | b29e626 | 2014-04-09 16:02:14 -0700 | [diff] [blame] | 325 | } |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 326 | |
| 327 | // compute checksum if needed |
| 328 | if (this.checksum == 0) { |
| 329 | bb.rewind(); |
| 330 | int accumulation = 0; |
| 331 | for (int i = 0; i < this.headerLength * 2; ++i) { |
| 332 | accumulation += 0xffff & bb.getShort(); |
| 333 | } |
| 334 | accumulation = ((accumulation >> 16) & 0xffff) |
| 335 | + (accumulation & 0xffff); |
| 336 | this.checksum = (short) (~accumulation & 0xffff); |
| 337 | bb.putShort(10, this.checksum); |
| 338 | } |
| 339 | return data; |
| 340 | } |
| 341 | |
| 342 | @Override |
| 343 | public IPacket deserialize(byte[] data, int offset, int length) { |
| 344 | ByteBuffer bb = ByteBuffer.wrap(data, offset, length); |
| 345 | short sscratch; |
| 346 | |
| 347 | this.version = bb.get(); |
| 348 | this.headerLength = (byte) (this.version & 0xf); |
| 349 | this.version = (byte) ((this.version >> 4) & 0xf); |
| 350 | this.diffServ = bb.get(); |
| 351 | this.totalLength = bb.getShort(); |
| 352 | this.identification = bb.getShort(); |
| 353 | sscratch = bb.getShort(); |
| 354 | this.flags = (byte) ((sscratch >> 13) & 0x7); |
| 355 | this.fragmentOffset = (short) (sscratch & 0x1fff); |
| 356 | this.ttl = bb.get(); |
| 357 | this.protocol = bb.get(); |
| 358 | this.checksum = bb.getShort(); |
| 359 | this.sourceAddress = bb.getInt(); |
| 360 | this.destinationAddress = bb.getInt(); |
| 361 | |
| 362 | if (this.headerLength > 5) { |
| 363 | int optionsLength = (this.headerLength - 5) * 4; |
| 364 | this.options = new byte[optionsLength]; |
| 365 | bb.get(this.options); |
| 366 | } |
| 367 | |
| 368 | IPacket payload; |
Pavlin Radoslavov | 608fac3 | 2014-04-09 12:40:24 -0700 | [diff] [blame] | 369 | if (IPv4.PROTOCOL_CLASS_MAP.containsKey(this.protocol)) { |
| 370 | Class<? extends IPacket> clazz = IPv4.PROTOCOL_CLASS_MAP.get(this.protocol); |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 371 | try { |
| 372 | payload = clazz.newInstance(); |
| 373 | } catch (Exception e) { |
| 374 | throw new RuntimeException("Error parsing payload for IPv4 packet", e); |
| 375 | } |
| 376 | } else { |
| 377 | payload = new Data(); |
| 378 | } |
Ray Milkey | 269ffb9 | 2014-04-03 14:43:30 -0700 | [diff] [blame] | 379 | this.payload = payload.deserialize(data, bb.position(), bb.limit() - bb.position()); |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 380 | this.payload.setParent(this); |
| 381 | |
Ray Milkey | b29e626 | 2014-04-09 16:02:14 -0700 | [diff] [blame] | 382 | if (this.totalLength != length) { |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 383 | this.isTruncated = true; |
Ray Milkey | b29e626 | 2014-04-09 16:02:14 -0700 | [diff] [blame] | 384 | } else { |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 385 | this.isTruncated = false; |
Ray Milkey | b29e626 | 2014-04-09 16:02:14 -0700 | [diff] [blame] | 386 | } |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 387 | |
| 388 | return this; |
| 389 | } |
| 390 | |
| 391 | /** |
| 392 | * Accepts an IPv4 address of the form xxx.xxx.xxx.xxx, ie 192.168.0.1 and |
| 393 | * returns the corresponding 32 bit integer. |
Ray Milkey | 269ffb9 | 2014-04-03 14:43:30 -0700 | [diff] [blame] | 394 | * |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 395 | * @param ipAddress |
| 396 | * @return |
| 397 | */ |
| 398 | public static int toIPv4Address(String ipAddress) { |
Ray Milkey | b29e626 | 2014-04-09 16:02:14 -0700 | [diff] [blame] | 399 | if (ipAddress == null) { |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 400 | throw new IllegalArgumentException("Specified IPv4 address must" + |
Ray Milkey | 269ffb9 | 2014-04-03 14:43:30 -0700 | [diff] [blame] | 401 | "contain 4 sets of numerical digits separated by periods"); |
Ray Milkey | b29e626 | 2014-04-09 16:02:14 -0700 | [diff] [blame] | 402 | } |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 403 | String[] octets = ipAddress.split("\\."); |
Ray Milkey | b29e626 | 2014-04-09 16:02:14 -0700 | [diff] [blame] | 404 | if (octets.length != 4) { |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 405 | throw new IllegalArgumentException("Specified IPv4 address must" + |
Ray Milkey | 269ffb9 | 2014-04-03 14:43:30 -0700 | [diff] [blame] | 406 | "contain 4 sets of numerical digits separated by periods"); |
Ray Milkey | b29e626 | 2014-04-09 16:02:14 -0700 | [diff] [blame] | 407 | } |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 408 | |
| 409 | int result = 0; |
| 410 | for (int i = 0; i < 4; ++i) { |
Ray Milkey | 269ffb9 | 2014-04-03 14:43:30 -0700 | [diff] [blame] | 411 | result |= Integer.valueOf(octets[i]) << ((3 - i) * 8); |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 412 | } |
| 413 | return result; |
| 414 | } |
| 415 | |
| 416 | /** |
| 417 | * Accepts an IPv4 address in a byte array and returns the corresponding |
| 418 | * 32-bit integer value. |
Ray Milkey | 269ffb9 | 2014-04-03 14:43:30 -0700 | [diff] [blame] | 419 | * |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 420 | * @param ipAddress |
| 421 | * @return |
| 422 | */ |
| 423 | public static int toIPv4Address(byte[] ipAddress) { |
| 424 | int ip = 0; |
| 425 | for (int i = 0; i < 4; i++) { |
Ray Milkey | 269ffb9 | 2014-04-03 14:43:30 -0700 | [diff] [blame] | 426 | int t = (ipAddress[i] & 0xff) << ((3 - i) * 8); |
| 427 | ip |= t; |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 428 | } |
| 429 | return ip; |
| 430 | } |
| 431 | |
| 432 | /** |
| 433 | * Accepts an IPv4 address and returns of string of the form xxx.xxx.xxx.xxx |
Ray Milkey | b41100a | 2014-04-10 10:42:15 -0700 | [diff] [blame] | 434 | * ie 192.168.0.1. |
Ray Milkey | 269ffb9 | 2014-04-03 14:43:30 -0700 | [diff] [blame] | 435 | * |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 436 | * @param ipAddress |
| 437 | * @return |
| 438 | */ |
| 439 | public static String fromIPv4Address(int ipAddress) { |
| 440 | StringBuffer sb = new StringBuffer(); |
| 441 | int result = 0; |
| 442 | for (int i = 0; i < 4; ++i) { |
Ray Milkey | 269ffb9 | 2014-04-03 14:43:30 -0700 | [diff] [blame] | 443 | result = (ipAddress >> ((3 - i) * 8)) & 0xff; |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 444 | sb.append(Integer.valueOf(result).toString()); |
Ray Milkey | b29e626 | 2014-04-09 16:02:14 -0700 | [diff] [blame] | 445 | if (i != 3) { |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 446 | sb.append("."); |
Ray Milkey | b29e626 | 2014-04-09 16:02:14 -0700 | [diff] [blame] | 447 | } |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 448 | } |
| 449 | return sb.toString(); |
| 450 | } |
| 451 | |
| 452 | /** |
| 453 | * Accepts a collection of IPv4 addresses as integers and returns a single |
| 454 | * String useful in toString method's containing collections of IP |
| 455 | * addresses. |
Ray Milkey | 269ffb9 | 2014-04-03 14:43:30 -0700 | [diff] [blame] | 456 | * |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 457 | * @param ipAddresses collection |
| 458 | * @return |
| 459 | */ |
| 460 | public static String fromIPv4AddressCollection(Collection<Integer> ipAddresses) { |
Ray Milkey | b29e626 | 2014-04-09 16:02:14 -0700 | [diff] [blame] | 461 | if (ipAddresses == null) { |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 462 | return "null"; |
Ray Milkey | b29e626 | 2014-04-09 16:02:14 -0700 | [diff] [blame] | 463 | } |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 464 | StringBuffer sb = new StringBuffer(); |
| 465 | sb.append("["); |
| 466 | for (Integer ip : ipAddresses) { |
| 467 | sb.append(fromIPv4Address(ip)); |
| 468 | sb.append(","); |
| 469 | } |
Ray Milkey | 269ffb9 | 2014-04-03 14:43:30 -0700 | [diff] [blame] | 470 | sb.replace(sb.length() - 1, sb.length(), "]"); |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 471 | return sb.toString(); |
| 472 | } |
| 473 | |
| 474 | /** |
| 475 | * Accepts an IPv4 address of the form xxx.xxx.xxx.xxx, ie 192.168.0.1 and |
| 476 | * returns the corresponding byte array. |
Ray Milkey | 269ffb9 | 2014-04-03 14:43:30 -0700 | [diff] [blame] | 477 | * |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 478 | * @param ipAddress The IP address in the form xx.xxx.xxx.xxx. |
| 479 | * @return The IP address separated into bytes |
| 480 | */ |
| 481 | public static byte[] toIPv4AddressBytes(String ipAddress) { |
| 482 | String[] octets = ipAddress.split("\\."); |
Ray Milkey | b29e626 | 2014-04-09 16:02:14 -0700 | [diff] [blame] | 483 | if (octets.length != 4) { |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 484 | throw new IllegalArgumentException("Specified IPv4 address must" + |
Ray Milkey | 269ffb9 | 2014-04-03 14:43:30 -0700 | [diff] [blame] | 485 | "contain 4 sets of numerical digits separated by periods"); |
Ray Milkey | b29e626 | 2014-04-09 16:02:14 -0700 | [diff] [blame] | 486 | } |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 487 | |
| 488 | byte[] result = new byte[4]; |
| 489 | for (int i = 0; i < 4; ++i) { |
| 490 | result[i] = Integer.valueOf(octets[i]).byteValue(); |
| 491 | } |
| 492 | return result; |
| 493 | } |
Ray Milkey | 269ffb9 | 2014-04-03 14:43:30 -0700 | [diff] [blame] | 494 | |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 495 | /** |
| 496 | * Accepts an IPv4 address in the form of an integer and |
| 497 | * returns the corresponding byte array. |
Ray Milkey | 269ffb9 | 2014-04-03 14:43:30 -0700 | [diff] [blame] | 498 | * |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 499 | * @param ipAddress The IP address as an integer. |
| 500 | * @return The IP address separated into bytes. |
| 501 | */ |
| 502 | public static byte[] toIPv4AddressBytes(int ipAddress) { |
Ray Milkey | 269ffb9 | 2014-04-03 14:43:30 -0700 | [diff] [blame] | 503 | return new byte[]{ |
| 504 | (byte) (ipAddress >>> 24), |
| 505 | (byte) (ipAddress >>> 16), |
| 506 | (byte) (ipAddress >>> 8), |
| 507 | (byte) ipAddress}; |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 508 | } |
| 509 | |
| 510 | /* (non-Javadoc) |
| 511 | * @see java.lang.Object#hashCode() |
| 512 | */ |
| 513 | @Override |
| 514 | public int hashCode() { |
| 515 | final int prime = 2521; |
| 516 | int result = super.hashCode(); |
| 517 | result = prime * result + checksum; |
| 518 | result = prime * result + destinationAddress; |
| 519 | result = prime * result + diffServ; |
| 520 | result = prime * result + flags; |
| 521 | result = prime * result + fragmentOffset; |
| 522 | result = prime * result + headerLength; |
| 523 | result = prime * result + identification; |
| 524 | result = prime * result + Arrays.hashCode(options); |
| 525 | result = prime * result + protocol; |
| 526 | result = prime * result + sourceAddress; |
| 527 | result = prime * result + totalLength; |
| 528 | result = prime * result + ttl; |
| 529 | result = prime * result + version; |
| 530 | return result; |
| 531 | } |
| 532 | |
| 533 | /* (non-Javadoc) |
| 534 | * @see java.lang.Object#equals(java.lang.Object) |
| 535 | */ |
| 536 | @Override |
| 537 | public boolean equals(Object obj) { |
Ray Milkey | b29e626 | 2014-04-09 16:02:14 -0700 | [diff] [blame] | 538 | if (this == obj) { |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 539 | return true; |
Ray Milkey | b29e626 | 2014-04-09 16:02:14 -0700 | [diff] [blame] | 540 | } |
| 541 | if (!super.equals(obj)) { |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 542 | return false; |
Ray Milkey | b29e626 | 2014-04-09 16:02:14 -0700 | [diff] [blame] | 543 | } |
| 544 | if (!(obj instanceof IPv4)) { |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 545 | return false; |
Ray Milkey | b29e626 | 2014-04-09 16:02:14 -0700 | [diff] [blame] | 546 | } |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 547 | IPv4 other = (IPv4) obj; |
Ray Milkey | b29e626 | 2014-04-09 16:02:14 -0700 | [diff] [blame] | 548 | if (checksum != other.checksum) { |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 549 | return false; |
Ray Milkey | b29e626 | 2014-04-09 16:02:14 -0700 | [diff] [blame] | 550 | } |
| 551 | if (destinationAddress != other.destinationAddress) { |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 552 | return false; |
Ray Milkey | b29e626 | 2014-04-09 16:02:14 -0700 | [diff] [blame] | 553 | } |
| 554 | if (diffServ != other.diffServ) { |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 555 | return false; |
Ray Milkey | b29e626 | 2014-04-09 16:02:14 -0700 | [diff] [blame] | 556 | } |
| 557 | if (flags != other.flags) { |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 558 | return false; |
Ray Milkey | b29e626 | 2014-04-09 16:02:14 -0700 | [diff] [blame] | 559 | } |
| 560 | if (fragmentOffset != other.fragmentOffset) { |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 561 | return false; |
Ray Milkey | b29e626 | 2014-04-09 16:02:14 -0700 | [diff] [blame] | 562 | } |
| 563 | if (headerLength != other.headerLength) { |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 564 | return false; |
Ray Milkey | b29e626 | 2014-04-09 16:02:14 -0700 | [diff] [blame] | 565 | } |
| 566 | if (identification != other.identification) { |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 567 | return false; |
Ray Milkey | b29e626 | 2014-04-09 16:02:14 -0700 | [diff] [blame] | 568 | } |
| 569 | if (!Arrays.equals(options, other.options)) { |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 570 | return false; |
Ray Milkey | b29e626 | 2014-04-09 16:02:14 -0700 | [diff] [blame] | 571 | } |
| 572 | if (protocol != other.protocol) { |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 573 | return false; |
Ray Milkey | b29e626 | 2014-04-09 16:02:14 -0700 | [diff] [blame] | 574 | } |
| 575 | if (sourceAddress != other.sourceAddress) { |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 576 | return false; |
Ray Milkey | b29e626 | 2014-04-09 16:02:14 -0700 | [diff] [blame] | 577 | } |
| 578 | if (totalLength != other.totalLength) { |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 579 | return false; |
Ray Milkey | b29e626 | 2014-04-09 16:02:14 -0700 | [diff] [blame] | 580 | } |
| 581 | if (ttl != other.ttl) { |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 582 | return false; |
Ray Milkey | b29e626 | 2014-04-09 16:02:14 -0700 | [diff] [blame] | 583 | } |
| 584 | if (version != other.version) { |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 585 | return false; |
Ray Milkey | b29e626 | 2014-04-09 16:02:14 -0700 | [diff] [blame] | 586 | } |
Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 587 | return true; |
| 588 | } |
| 589 | } |