Yotam Harchol | f3f1115 | 2013-09-05 16:47:16 -0700 | [diff] [blame] | 1 | package org.projectfloodlight.openflow.types; |
| 2 | |
| 3 | import java.util.regex.Pattern; |
| 4 | |
| 5 | import org.jboss.netty.buffer.ChannelBuffer; |
| 6 | import org.projectfloodlight.openflow.exceptions.OFParseError; |
Andreas Wundsam | 22ba3af | 2013-10-04 16:00:30 -0700 | [diff] [blame] | 7 | import com.google.common.hash.PrimitiveSink; |
Andreas Wundsam | 85c961f | 2013-09-29 21:22:12 -0700 | [diff] [blame] | 8 | import com.google.common.primitives.Longs; |
| 9 | |
Yotam Harchol | f3f1115 | 2013-09-05 16:47:16 -0700 | [diff] [blame] | 10 | /** |
| 11 | * IPv6 address object. Instance controlled, immutable. Internal representation: |
| 12 | * two 64 bit longs (not that you'd have to know). |
| 13 | * |
| 14 | * @author Andreas Wundsam <andreas.wundsam@teleteach.de> |
| 15 | */ |
Yotam Harchol | 4d63468 | 2013-09-26 13:21:06 -0700 | [diff] [blame] | 16 | public class IPv6Address extends IPAddress<IPv6Address> { |
Yotam Harchol | f3f1115 | 2013-09-05 16:47:16 -0700 | [diff] [blame] | 17 | static final int LENGTH = 16; |
| 18 | private final long raw1; |
| 19 | private final long raw2; |
| 20 | |
Gregor Maier | 1acb450 | 2013-12-12 11:25:07 -0800 | [diff] [blame] | 21 | private static final int NOT_A_CIDR_MASK = -1; |
| 22 | private static final int CIDR_MASK_CACHE_UNSET = -2; |
Gregor Maier | 5615b6c | 2013-12-11 22:29:07 -0800 | [diff] [blame] | 23 | // Must appear before the static IPv4Address constant assignments |
| 24 | private volatile int cidrMaskLengthCache = CIDR_MASK_CACHE_UNSET; |
| 25 | |
Andreas Wundsam | b75c4ad | 2013-09-23 14:45:35 -0700 | [diff] [blame] | 26 | private final static long NONE_VAL1 = 0x0L; |
| 27 | private final static long NONE_VAL2 = 0x0L; |
| 28 | public static final IPv6Address NONE = new IPv6Address(NONE_VAL1, NONE_VAL2); |
| 29 | |
Gregor Maier | 5615b6c | 2013-12-11 22:29:07 -0800 | [diff] [blame] | 30 | |
Yotam Harchol | a289d55 | 2013-09-16 10:10:40 -0700 | [diff] [blame] | 31 | public static final IPv6Address NO_MASK = IPv6Address.of(0xFFFFFFFFFFFFFFFFl, 0xFFFFFFFFFFFFFFFFl); |
| 32 | public static final IPv6Address FULL_MASK = IPv6Address.of(0x0, 0x0); |
Yotam Harchol | f3f1115 | 2013-09-05 16:47:16 -0700 | [diff] [blame] | 33 | |
Yotam Harchol | a289d55 | 2013-09-16 10:10:40 -0700 | [diff] [blame] | 34 | private IPv6Address(final long raw1, final long raw2) { |
Yotam Harchol | f3f1115 | 2013-09-05 16:47:16 -0700 | [diff] [blame] | 35 | this.raw1 = raw1; |
| 36 | this.raw2 = raw2; |
| 37 | } |
| 38 | |
Yotam Harchol | 4d63468 | 2013-09-26 13:21:06 -0700 | [diff] [blame] | 39 | @Override |
Yotam Harchol | eb023dc | 2013-09-26 15:45:44 -0700 | [diff] [blame] | 40 | public IPVersion getIpVersion() { |
| 41 | return IPVersion.IPv6; |
Yotam Harchol | 4d63468 | 2013-09-26 13:21:06 -0700 | [diff] [blame] | 42 | } |
| 43 | |
Gregor Maier | 7f987e6 | 2013-12-10 19:34:18 -0800 | [diff] [blame] | 44 | |
Gregor Maier | 5615b6c | 2013-12-11 22:29:07 -0800 | [diff] [blame] | 45 | private int computeCidrMask64(long raw) { |
| 46 | long mask = raw; |
| 47 | if (raw == 0) |
| 48 | return 0; |
Gregor Maier | 1acb450 | 2013-12-12 11:25:07 -0800 | [diff] [blame] | 49 | else if (Long.bitCount((~mask) + 1) == 1) { |
Gregor Maier | 5615b6c | 2013-12-11 22:29:07 -0800 | [diff] [blame] | 50 | // represent a true CIDR prefix length |
| 51 | return Long.bitCount(mask); |
| 52 | } |
| 53 | else { |
| 54 | // Not a true prefix |
| 55 | return NOT_A_CIDR_MASK; |
| 56 | } |
| 57 | } |
| 58 | |
| 59 | private int asCidrMaskLengthInternal() { |
| 60 | if (cidrMaskLengthCache == CIDR_MASK_CACHE_UNSET) { |
Gregor Maier | 1acb450 | 2013-12-12 11:25:07 -0800 | [diff] [blame] | 61 | // No synchronization needed. Writing cidrMaskLengthCache only once |
| 62 | if (raw1 == 0 && raw2 == 0) { |
| 63 | cidrMaskLengthCache = 0; |
| 64 | } else if (raw1 == -1L) { |
| 65 | // top half is all 1 bits |
| 66 | int tmpLength = computeCidrMask64(raw2); |
| 67 | if (tmpLength != NOT_A_CIDR_MASK) |
| 68 | tmpLength += 64; |
| 69 | cidrMaskLengthCache = tmpLength; |
| 70 | } else if (raw2 == 0) { |
| 71 | cidrMaskLengthCache = computeCidrMask64(raw1); |
| 72 | } else { |
| 73 | cidrMaskLengthCache = NOT_A_CIDR_MASK; |
Gregor Maier | 5615b6c | 2013-12-11 22:29:07 -0800 | [diff] [blame] | 74 | } |
| 75 | } |
| 76 | return cidrMaskLengthCache; |
| 77 | } |
| 78 | |
| 79 | @Override |
| 80 | public boolean isCidrMask() { |
| 81 | return asCidrMaskLengthInternal() != NOT_A_CIDR_MASK; |
| 82 | } |
| 83 | |
Gregor Maier | 7f987e6 | 2013-12-10 19:34:18 -0800 | [diff] [blame] | 84 | @Override |
| 85 | public int asCidrMaskLength() { |
Gregor Maier | 5615b6c | 2013-12-11 22:29:07 -0800 | [diff] [blame] | 86 | if (!isCidrMask()) { |
| 87 | throw new IllegalStateException("IP is not a valid CIDR prefix " + |
| 88 | "mask " + toString()); |
Gregor Maier | 7f987e6 | 2013-12-10 19:34:18 -0800 | [diff] [blame] | 89 | } else { |
Gregor Maier | 5615b6c | 2013-12-11 22:29:07 -0800 | [diff] [blame] | 90 | return asCidrMaskLengthInternal(); |
Gregor Maier | 7f987e6 | 2013-12-10 19:34:18 -0800 | [diff] [blame] | 91 | } |
| 92 | } |
| 93 | |
Yotam Harchol | a289d55 | 2013-09-16 10:10:40 -0700 | [diff] [blame] | 94 | public static IPv6Address of(final byte[] address) { |
Gregor Maier | 1ff5597 | 2013-12-11 02:22:56 -0800 | [diff] [blame] | 95 | if (address == null) { |
| 96 | throw new NullPointerException("Address must not be null"); |
| 97 | } |
Yotam Harchol | f3f1115 | 2013-09-05 16:47:16 -0700 | [diff] [blame] | 98 | if (address.length != LENGTH) { |
| 99 | throw new IllegalArgumentException( |
Andreas Wundsam | c85b5c5 | 2013-09-24 13:01:43 -0700 | [diff] [blame] | 100 | "Invalid byte array length for IPv6 address: " + address.length); |
Yotam Harchol | f3f1115 | 2013-09-05 16:47:16 -0700 | [diff] [blame] | 101 | } |
| 102 | |
| 103 | long raw1 = |
| 104 | (address[0] & 0xFFL) << 56 | (address[1] & 0xFFL) << 48 |
| 105 | | (address[2] & 0xFFL) << 40 | (address[3] & 0xFFL) << 32 |
| 106 | | (address[4] & 0xFFL) << 24 | (address[5] & 0xFFL) << 16 |
| 107 | | (address[6] & 0xFFL) << 8 | (address[7]); |
| 108 | |
| 109 | long raw2 = |
| 110 | (address[8] & 0xFFL) << 56 | (address[9] & 0xFFL) << 48 |
| 111 | | (address[10] & 0xFFL) << 40 | (address[11] & 0xFFL) << 32 |
| 112 | | (address[12] & 0xFFL) << 24 | (address[13] & 0xFFL) << 16 |
| 113 | | (address[14] & 0xFFL) << 8 | (address[15]); |
| 114 | |
Yotam Harchol | a289d55 | 2013-09-16 10:10:40 -0700 | [diff] [blame] | 115 | return IPv6Address.of(raw1, raw2); |
Yotam Harchol | f3f1115 | 2013-09-05 16:47:16 -0700 | [diff] [blame] | 116 | } |
| 117 | |
| 118 | private static class IPv6Builder { |
| 119 | private long raw1, raw2; |
| 120 | |
| 121 | public void setUnsignedShortWord(final int i, final int value) { |
| 122 | int shift = 48 - (i % 4) * 16; |
| 123 | |
| 124 | if (value < 0 || value > 0xFFFF) |
| 125 | throw new IllegalArgumentException("16 bit word must be in [0, 0xFFFF]"); |
| 126 | |
| 127 | if (i >= 0 && i < 4) |
| 128 | raw1 = raw1 & ~(0xFFFFL << shift) | (value & 0xFFFFL) << shift; |
| 129 | else if (i >= 4 && i < 8) |
| 130 | raw2 = raw2 & ~(0xFFFFL << shift) | (value & 0xFFFFL) << shift; |
| 131 | else |
| 132 | throw new IllegalArgumentException("16 bit word index must be in [0,7]"); |
| 133 | } |
| 134 | |
Yotam Harchol | a289d55 | 2013-09-16 10:10:40 -0700 | [diff] [blame] | 135 | public IPv6Address getIPv6() { |
| 136 | return IPv6Address.of(raw1, raw2); |
Yotam Harchol | f3f1115 | 2013-09-05 16:47:16 -0700 | [diff] [blame] | 137 | } |
| 138 | } |
| 139 | |
| 140 | private final static Pattern colonPattern = Pattern.compile(":"); |
| 141 | |
Yotam Harchol | a289d55 | 2013-09-16 10:10:40 -0700 | [diff] [blame] | 142 | public static IPv6Address of(final String string) { |
Gregor Maier | 1ff5597 | 2013-12-11 02:22:56 -0800 | [diff] [blame] | 143 | if (string == null) { |
| 144 | throw new NullPointerException("String must not be null"); |
| 145 | } |
Yotam Harchol | f3f1115 | 2013-09-05 16:47:16 -0700 | [diff] [blame] | 146 | IPv6Builder builder = new IPv6Builder(); |
| 147 | String[] parts = colonPattern.split(string, -1); |
| 148 | |
| 149 | int leftWord = 0; |
| 150 | int leftIndex = 0; |
| 151 | |
| 152 | boolean hitZeroCompression = false; |
| 153 | |
| 154 | for (leftIndex = 0; leftIndex < parts.length; leftIndex++) { |
| 155 | String part = parts[leftIndex]; |
| 156 | if (part.length() == 0) { |
| 157 | // hit empty group of zero compression |
| 158 | hitZeroCompression = true; |
| 159 | break; |
| 160 | } |
| 161 | builder.setUnsignedShortWord(leftWord++, Integer.parseInt(part, 16)); |
| 162 | } |
| 163 | |
| 164 | if (hitZeroCompression) { |
| 165 | if (leftIndex == 0) { |
| 166 | // if colon is at the start, two columns must be at the start, |
| 167 | // move to the second empty group |
| 168 | leftIndex = 1; |
| 169 | if (parts.length < 2 || parts[1].length() > 0) |
| 170 | throw new IllegalArgumentException("Malformed IPv6 address: " + string); |
| 171 | } |
| 172 | |
| 173 | int rightWord = 7; |
| 174 | int rightIndex; |
| 175 | for (rightIndex = parts.length - 1; rightIndex > leftIndex; rightIndex--) { |
| 176 | String part = parts[rightIndex]; |
| 177 | if (part.length() == 0) |
| 178 | break; |
| 179 | builder.setUnsignedShortWord(rightWord--, Integer.parseInt(part, 16)); |
| 180 | } |
| 181 | if (rightIndex == parts.length - 1) { |
| 182 | // if colon is at the end, two columns must be at the end, move |
| 183 | // to the second empty group |
| 184 | if (rightIndex < 1 || parts[rightIndex - 1].length() > 0) |
| 185 | throw new IllegalArgumentException("Malformed IPv6 address: " + string); |
| 186 | rightIndex--; |
| 187 | } |
| 188 | if (leftIndex != rightIndex) |
| 189 | throw new IllegalArgumentException("Malformed IPv6 address: " + string); |
| 190 | } else { |
| 191 | if (leftIndex != 8) { |
| 192 | throw new IllegalArgumentException("Malformed IPv6 address: " + string); |
| 193 | } |
| 194 | } |
| 195 | return builder.getIPv6(); |
| 196 | } |
| 197 | |
Yotam Harchol | a289d55 | 2013-09-16 10:10:40 -0700 | [diff] [blame] | 198 | public static IPv6Address of(final long raw1, final long raw2) { |
Andreas Wundsam | b75c4ad | 2013-09-23 14:45:35 -0700 | [diff] [blame] | 199 | if(raw1==NONE_VAL1 && raw2 == NONE_VAL2) |
| 200 | return NONE; |
Yotam Harchol | a289d55 | 2013-09-16 10:10:40 -0700 | [diff] [blame] | 201 | return new IPv6Address(raw1, raw2); |
Yotam Harchol | f3f1115 | 2013-09-05 16:47:16 -0700 | [diff] [blame] | 202 | } |
| 203 | |
| 204 | volatile byte[] bytesCache = null; |
| 205 | |
| 206 | public byte[] getBytes() { |
| 207 | if (bytesCache == null) { |
| 208 | synchronized (this) { |
| 209 | if (bytesCache == null) { |
| 210 | bytesCache = |
| 211 | new byte[] { (byte) ((raw1 >> 56) & 0xFF), |
| 212 | (byte) ((raw1 >> 48) & 0xFF), |
| 213 | (byte) ((raw1 >> 40) & 0xFF), |
| 214 | (byte) ((raw1 >> 32) & 0xFF), |
| 215 | (byte) ((raw1 >> 24) & 0xFF), |
| 216 | (byte) ((raw1 >> 16) & 0xFF), |
| 217 | (byte) ((raw1 >> 8) & 0xFF), |
| 218 | (byte) ((raw1 >> 0) & 0xFF), |
| 219 | |
| 220 | (byte) ((raw2 >> 56) & 0xFF), |
| 221 | (byte) ((raw2 >> 48) & 0xFF), |
| 222 | (byte) ((raw2 >> 40) & 0xFF), |
| 223 | (byte) ((raw2 >> 32) & 0xFF), |
| 224 | (byte) ((raw2 >> 24) & 0xFF), |
| 225 | (byte) ((raw2 >> 16) & 0xFF), |
| 226 | (byte) ((raw2 >> 8) & 0xFF), |
| 227 | (byte) ((raw2 >> 0) & 0xFF) }; |
| 228 | } |
| 229 | } |
| 230 | } |
| 231 | return bytesCache; |
| 232 | } |
| 233 | |
| 234 | @Override |
| 235 | public int getLength() { |
| 236 | return LENGTH; |
| 237 | } |
| 238 | |
| 239 | @Override |
| 240 | public String toString() { |
| 241 | return toString(true, false); |
| 242 | } |
| 243 | |
| 244 | public int getUnsignedShortWord(final int i) { |
| 245 | if (i >= 0 && i < 4) |
| 246 | return (int) ((raw1 >>> (48 - i * 16)) & 0xFFFF); |
| 247 | else if (i >= 4 && i < 8) |
| 248 | return (int) ((raw2 >>> (48 - (i - 4) * 16)) & 0xFFFF); |
| 249 | else |
| 250 | throw new IllegalArgumentException("16 bit word index must be in [0,7]"); |
| 251 | } |
| 252 | |
| 253 | /** get the index of the first word where to apply IPv6 zero compression */ |
| 254 | public int getZeroCompressStart() { |
| 255 | int start = Integer.MAX_VALUE; |
| 256 | int maxLength = -1; |
| 257 | |
| 258 | int candidateStart = -1; |
| 259 | |
| 260 | for (int i = 0; i < 8; i++) { |
| 261 | if (candidateStart >= 0) { |
| 262 | // in a zero octect |
| 263 | if (getUnsignedShortWord(i) != 0) { |
| 264 | // end of this candidate word |
| 265 | int candidateLength = i - candidateStart; |
| 266 | if (candidateLength >= maxLength) { |
| 267 | start = candidateStart; |
| 268 | maxLength = candidateLength; |
| 269 | } |
| 270 | candidateStart = -1; |
| 271 | } |
| 272 | } else { |
| 273 | // not in a zero octect |
| 274 | if (getUnsignedShortWord(i) == 0) { |
| 275 | candidateStart = i; |
| 276 | } |
| 277 | } |
| 278 | } |
| 279 | |
| 280 | if (candidateStart >= 0) { |
| 281 | int candidateLength = 8 - candidateStart; |
| 282 | if (candidateLength >= maxLength) { |
| 283 | start = candidateStart; |
| 284 | maxLength = candidateLength; |
| 285 | } |
| 286 | } |
| 287 | |
| 288 | return start; |
| 289 | } |
| 290 | |
| 291 | public String toString(final boolean zeroCompression, final boolean leadingZeros) { |
| 292 | StringBuilder res = new StringBuilder(); |
| 293 | |
| 294 | int compressionStart = zeroCompression ? getZeroCompressStart() : Integer.MAX_VALUE; |
| 295 | boolean inCompression = false; |
| 296 | boolean colonNeeded = false; |
| 297 | |
| 298 | for (int i = 0; i < 8; i++) { |
| 299 | int word = getUnsignedShortWord(i); |
| 300 | |
| 301 | if (word == 0) { |
| 302 | if (inCompression) |
| 303 | continue; |
| 304 | else if (i == compressionStart) { |
| 305 | res.append(':').append(':'); |
| 306 | inCompression = true; |
| 307 | colonNeeded = false; |
| 308 | continue; |
| 309 | } |
| 310 | } else { |
| 311 | inCompression = false; |
| 312 | } |
| 313 | |
| 314 | if (colonNeeded) { |
| 315 | res.append(':'); |
| 316 | colonNeeded = false; |
| 317 | } |
| 318 | |
| 319 | res.append(leadingZeros ? String.format("%04x", word) : Integer.toString(word, |
| 320 | 16)); |
| 321 | colonNeeded = true; |
| 322 | } |
| 323 | return res.toString(); |
| 324 | } |
| 325 | |
| 326 | @Override |
| 327 | public int hashCode() { |
| 328 | final int prime = 31; |
| 329 | int result = 1; |
| 330 | result = prime * result + (int) (raw1 ^ (raw1 >>> 32)); |
| 331 | result = prime * result + (int) (raw2 ^ (raw2 >>> 32)); |
| 332 | return result; |
| 333 | } |
| 334 | |
| 335 | @Override |
| 336 | public boolean equals(final Object obj) { |
| 337 | if (this == obj) |
| 338 | return true; |
| 339 | if (obj == null) |
| 340 | return false; |
| 341 | if (getClass() != obj.getClass()) |
| 342 | return false; |
Yotam Harchol | a289d55 | 2013-09-16 10:10:40 -0700 | [diff] [blame] | 343 | IPv6Address other = (IPv6Address) obj; |
Yotam Harchol | f3f1115 | 2013-09-05 16:47:16 -0700 | [diff] [blame] | 344 | if (raw1 != other.raw1) |
| 345 | return false; |
| 346 | if (raw2 != other.raw2) |
| 347 | return false; |
| 348 | return true; |
| 349 | } |
| 350 | |
| 351 | public void write16Bytes(ChannelBuffer c) { |
| 352 | c.writeLong(this.raw1); |
| 353 | c.writeLong(this.raw2); |
| 354 | } |
| 355 | |
Yotam Harchol | a289d55 | 2013-09-16 10:10:40 -0700 | [diff] [blame] | 356 | public static IPv6Address read16Bytes(ChannelBuffer c) throws OFParseError { |
| 357 | return IPv6Address.of(c.readLong(), c.readLong()); |
Yotam Harchol | f3f1115 | 2013-09-05 16:47:16 -0700 | [diff] [blame] | 358 | } |
| 359 | |
| 360 | @Override |
Yotam Harchol | a289d55 | 2013-09-16 10:10:40 -0700 | [diff] [blame] | 361 | public IPv6Address applyMask(IPv6Address mask) { |
| 362 | return IPv6Address.of(this.raw1 & mask.raw1, this.raw2 & mask.raw2); |
Yotam Harchol | f3f1115 | 2013-09-05 16:47:16 -0700 | [diff] [blame] | 363 | } |
Andreas Wundsam | 85c961f | 2013-09-29 21:22:12 -0700 | [diff] [blame] | 364 | |
| 365 | @Override |
| 366 | public int compareTo(IPv6Address o) { |
| 367 | int res = Longs.compare(raw1, o.raw1); |
| 368 | if(res != 0) |
| 369 | return res; |
| 370 | else |
| 371 | return Longs.compare(raw2, o.raw2); |
| 372 | } |
Andreas Wundsam | 22ba3af | 2013-10-04 16:00:30 -0700 | [diff] [blame] | 373 | |
| 374 | @Override |
| 375 | public void putTo(PrimitiveSink sink) { |
| 376 | sink.putLong(raw1); |
| 377 | sink.putLong(raw2); |
| 378 | } |
Yotam Harchol | f3f1115 | 2013-09-05 16:47:16 -0700 | [diff] [blame] | 379 | } |