1 /* 2 * Copyright (C) 2014 The Android Open Source Project 3 * Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. Oracle designates this 9 * particular file as subject to the "Classpath" exception as provided 10 * by Oracle in the LICENSE file that accompanied this code. 11 * 12 * This code is distributed in the hope that it will be useful, but WITHOUT 13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 15 * version 2 for more details (a copy is included in the LICENSE file that 16 * accompanied this code). 17 * 18 * You should have received a copy of the GNU General Public License version 19 * 2 along with this work; if not, write to the Free Software Foundation, 20 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 21 * 22 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 23 * or visit www.oracle.com if you need additional information or have any 24 * questions. 25 */ 26 27 package java.net; 28 29 import java.io.IOException; 30 import java.io.InvalidObjectException; 31 import java.io.ObjectInputStream; 32 import java.io.ObjectOutputStream; 33 import java.io.ObjectStreamField; 34 import java.util.Enumeration; 35 import java.util.Arrays; 36 import libcore.io.Libcore; 37 import static android.system.OsConstants.*; 38 39 /** 40 * This class represents an Internet Protocol version 6 (IPv6) address. 41 * Defined by <a href="http://www.ietf.org/rfc/rfc2373.txt"> 42 * <i>RFC 2373: IP Version 6 Addressing Architecture</i></a>. 43 * 44 * <h3> <A NAME="format">Textual representation of IP addresses</a> </h3> 45 * 46 * Textual representation of IPv6 address used as input to methods 47 * takes one of the following forms: 48 * 49 * <ol> 50 * <li><p> <A NAME="lform">The preferred form</a> is x:x:x:x:x:x:x:x, 51 * where the 'x's are 52 * the hexadecimal values of the eight 16-bit pieces of the 53 * address. This is the full form. For example, 54 * 55 * <blockquote><table cellpadding=0 cellspacing=0 summary="layout"> 56 * <tr><td>{@code 1080:0:0:0:8:800:200C:417A}<td></tr> 57 * </table></blockquote> 58 * 59 * <p> Note that it is not necessary to write the leading zeros in 60 * an individual field. However, there must be at least one numeral 61 * in every field, except as described below.</li> 62 * 63 * <li><p> Due to some methods of allocating certain styles of IPv6 64 * addresses, it will be common for addresses to contain long 65 * strings of zero bits. In order to make writing addresses 66 * containing zero bits easier, a special syntax is available to 67 * compress the zeros. The use of "::" indicates multiple groups 68 * of 16-bits of zeros. The "::" can only appear once in an address. 69 * The "::" can also be used to compress the leading and/or trailing 70 * zeros in an address. For example, 71 * 72 * <blockquote><table cellpadding=0 cellspacing=0 summary="layout"> 73 * <tr><td>{@code 1080::8:800:200C:417A}<td></tr> 74 * </table></blockquote> 75 * 76 * <li><p> An alternative form that is sometimes more convenient 77 * when dealing with a mixed environment of IPv4 and IPv6 nodes is 78 * x:x:x:x:x:x:d.d.d.d, where the 'x's are the hexadecimal values 79 * of the six high-order 16-bit pieces of the address, and the 'd's 80 * are the decimal values of the four low-order 8-bit pieces of the 81 * standard IPv4 representation address, for example, 82 * 83 * <blockquote><table cellpadding=0 cellspacing=0 summary="layout"> 84 * <tr><td>{@code ::FFFF:129.144.52.38}<td></tr> 85 * <tr><td>{@code ::129.144.52.38}<td></tr> 86 * </table></blockquote> 87 * 88 * <p> where "::FFFF:d.d.d.d" and "::d.d.d.d" are, respectively, the 89 * general forms of an IPv4-mapped IPv6 address and an 90 * IPv4-compatible IPv6 address. Note that the IPv4 portion must be 91 * in the "d.d.d.d" form. The following forms are invalid: 92 * 93 * <blockquote><table cellpadding=0 cellspacing=0 summary="layout"> 94 * <tr><td>{@code ::FFFF:d.d.d}<td></tr> 95 * <tr><td>{@code ::FFFF:d.d}<td></tr> 96 * <tr><td>{@code ::d.d.d}<td></tr> 97 * <tr><td>{@code ::d.d}<td></tr> 98 * </table></blockquote> 99 * 100 * <p> The following form: 101 * 102 * <blockquote><table cellpadding=0 cellspacing=0 summary="layout"> 103 * <tr><td>{@code ::FFFF:d}<td></tr> 104 * </table></blockquote> 105 * 106 * <p> is valid, however it is an unconventional representation of 107 * the IPv4-compatible IPv6 address, 108 * 109 * <blockquote><table cellpadding=0 cellspacing=0 summary="layout"> 110 * <tr><td>{@code ::255.255.0.d}<td></tr> 111 * </table></blockquote> 112 * 113 * <p> while "::d" corresponds to the general IPv6 address 114 * "0:0:0:0:0:0:0:d".</li> 115 * </ol> 116 * 117 * <p> For methods that return a textual representation as output 118 * value, the full form is used. Inet6Address will return the full 119 * form because it is unambiguous when used in combination with other 120 * textual data. 121 * 122 * <h4> Special IPv6 address </h4> 123 * 124 * <blockquote> 125 * <table cellspacing=2 summary="Description of IPv4-mapped address"> 126 * <tr><th valign=top><i>IPv4-mapped address</i></th> 127 * <td>Of the form::ffff:w.x.y.z, this IPv6 address is used to 128 * represent an IPv4 address. It allows the native program to 129 * use the same address data structure and also the same 130 * socket when communicating with both IPv4 and IPv6 nodes. 131 * 132 * <p>In InetAddress and Inet6Address, it is used for internal 133 * representation; it has no functional role. Java will never 134 * return an IPv4-mapped address. These classes can take an 135 * IPv4-mapped address as input, both in byte array and text 136 * representation. However, it will be converted into an IPv4 137 * address.</td></tr> 138 * </table></blockquote> 139 * 140 * <h4><A NAME="scoped">Textual representation of IPv6 scoped addresses</a></h4> 141 * 142 * <p> The textual representation of IPv6 addresses as described above can be 143 * extended to specify IPv6 scoped addresses. This extension to the basic 144 * addressing architecture is described in [draft-ietf-ipngwg-scoping-arch-04.txt]. 145 * 146 * <p> Because link-local and site-local addresses are non-global, it is possible 147 * that different hosts may have the same destination address and may be 148 * reachable through different interfaces on the same originating system. In 149 * this case, the originating system is said to be connected to multiple zones 150 * of the same scope. In order to disambiguate which is the intended destination 151 * zone, it is possible to append a zone identifier (or <i>scope_id</i>) to an 152 * IPv6 address. 153 * 154 * <p> The general format for specifying the <i>scope_id</i> is the following: 155 * 156 * <blockquote><i>IPv6-address</i>%<i>scope_id</i></blockquote> 157 * <p> The IPv6-address is a literal IPv6 address as described above. 158 * The <i>scope_id</i> refers to an interface on the local system, and it can be 159 * specified in two ways. 160 * <ol><li><i>As a numeric identifier.</i> This must be a positive integer 161 * that identifies the particular interface and scope as understood by the 162 * system. Usually, the numeric values can be determined through administration 163 * tools on the system. Each interface may have multiple values, one for each 164 * scope. If the scope is unspecified, then the default value used is zero.</li> 165 * <li><i>As a string.</i> This must be the exact string that is returned by 166 * {@link java.net.NetworkInterface#getName()} for the particular interface in 167 * question. When an Inet6Address is created in this way, the numeric scope-id 168 * is determined at the time the object is created by querying the relevant 169 * NetworkInterface.</li></ol> 170 * 171 * <p> Note also, that the numeric <i>scope_id</i> can be retrieved from 172 * Inet6Address instances returned from the NetworkInterface class. This can be 173 * used to find out the current scope ids configured on the system. 174 * @since 1.4 175 */ 176 177 public final 178 class Inet6Address extends InetAddress { 179 final static int INADDRSZ = 16; 180 181 // BEGIN Android-removed: Remove special handling for link-local addresses 182 /* 183 * cached scope_id - for link-local address use only. 184 * 185 private transient int cached_scope_id; // 0 186 */ 187 // END Android-removed: Remove special handling for link-local addresses 188 189 // BEGIN Android-added: Define special-purpose IPv6 address 190 /** @hide */ 191 public static final InetAddress ANY = 192 new Inet6Address("::", new byte[] {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0); 193 194 /** @hide */ 195 public static final InetAddress LOOPBACK = new Inet6Address("ip6-localhost", 196 new byte[] {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1}, 0); 197 // END Android-added: Define special-purpose IPv6 address 198 199 private class Inet6AddressHolder { 200 201 private Inet6AddressHolder() { 202 ipaddress = new byte[INADDRSZ]; 203 } 204 205 private Inet6AddressHolder( 206 byte[] ipaddress, int scope_id, boolean scope_id_set, 207 NetworkInterface ifname, boolean scope_ifname_set) 208 { 209 this.ipaddress = ipaddress; 210 this.scope_id = scope_id; 211 this.scope_id_set = scope_id_set; 212 this.scope_ifname_set = scope_ifname_set; 213 this.scope_ifname = ifname; 214 } 215 216 /** 217 * Holds a 128-bit (16 bytes) IPv6 address. 218 */ 219 byte[] ipaddress; 220 221 /** 222 * scope_id. The scope specified when the object is created. If the object 223 * is created with an interface name, then the scope_id is not determined 224 * until the time it is needed. 225 */ 226 int scope_id; // 0 227 228 /** 229 * This will be set to true when the scope_id field contains a valid 230 * integer scope_id. 231 */ 232 boolean scope_id_set; // false 233 234 /** 235 * scoped interface. scope_id is derived from this as the scope_id of the first 236 * address whose scope is the same as this address for the named interface. 237 */ 238 NetworkInterface scope_ifname; // null 239 240 /** 241 * set if the object is constructed with a scoped 242 * interface instead of a numeric scope id. 243 */ 244 boolean scope_ifname_set; // false; 245 246 void setAddr(byte addr[]) { 247 if (addr.length == INADDRSZ) { // normal IPv6 address 248 System.arraycopy(addr, 0, ipaddress, 0, INADDRSZ); 249 } 250 } 251 252 void init(byte addr[], int scope_id) { 253 setAddr(addr); 254 255 // Android-changed: was >= 0 256 if (scope_id > 0) { 257 this.scope_id = scope_id; 258 this.scope_id_set = true; 259 } 260 } 261 262 void init(byte addr[], NetworkInterface nif) 263 throws UnknownHostException 264 { 265 setAddr(addr); 266 267 if (nif != null) { 268 this.scope_id = deriveNumericScope(ipaddress, nif); 269 this.scope_id_set = true; 270 this.scope_ifname = nif; 271 this.scope_ifname_set = true; 272 } 273 } 274 275 // Android-removed: getnameinfo returns smarter representations than getHostAddress() 276 /* 277 String getHostAddress() { 278 String s = numericToTextFormat(ipaddress); 279 if (scope_ifname != null) { // must check this first 280 s = s + "%" + scope_ifname.getName(); 281 } else if (scope_id_set) { 282 s = s + "%" + scope_id; 283 } 284 return s; 285 } 286 */ 287 288 public boolean equals(Object o) { 289 if (! (o instanceof Inet6AddressHolder)) { 290 return false; 291 } 292 Inet6AddressHolder that = (Inet6AddressHolder)o; 293 294 return Arrays.equals(this.ipaddress, that.ipaddress); 295 } 296 297 public int hashCode() { 298 if (ipaddress != null) { 299 300 int hash = 0; 301 int i=0; 302 while (i<INADDRSZ) { 303 int j=0; 304 int component=0; 305 while (j<4 && i<INADDRSZ) { 306 component = (component << 8) + ipaddress[i]; 307 j++; 308 i++; 309 } 310 hash += component; 311 } 312 return hash; 313 314 } else { 315 return 0; 316 } 317 } 318 319 boolean isIPv4CompatibleAddress() { 320 if ((ipaddress[0] == 0x00) && (ipaddress[1] == 0x00) && 321 (ipaddress[2] == 0x00) && (ipaddress[3] == 0x00) && 322 (ipaddress[4] == 0x00) && (ipaddress[5] == 0x00) && 323 (ipaddress[6] == 0x00) && (ipaddress[7] == 0x00) && 324 (ipaddress[8] == 0x00) && (ipaddress[9] == 0x00) && 325 (ipaddress[10] == 0x00) && (ipaddress[11] == 0x00)) { 326 return true; 327 } 328 return false; 329 } 330 331 boolean isMulticastAddress() { 332 return ((ipaddress[0] & 0xff) == 0xff); 333 } 334 335 boolean isAnyLocalAddress() { 336 byte test = 0x00; 337 for (int i = 0; i < INADDRSZ; i++) { 338 test |= ipaddress[i]; 339 } 340 return (test == 0x00); 341 } 342 343 boolean isLoopbackAddress() { 344 byte test = 0x00; 345 for (int i = 0; i < 15; i++) { 346 test |= ipaddress[i]; 347 } 348 return (test == 0x00) && (ipaddress[15] == 0x01); 349 } 350 351 boolean isLinkLocalAddress() { 352 return ((ipaddress[0] & 0xff) == 0xfe 353 && (ipaddress[1] & 0xc0) == 0x80); 354 } 355 356 357 boolean isSiteLocalAddress() { 358 return ((ipaddress[0] & 0xff) == 0xfe 359 && (ipaddress[1] & 0xc0) == 0xc0); 360 } 361 362 boolean isMCGlobal() { 363 return ((ipaddress[0] & 0xff) == 0xff 364 && (ipaddress[1] & 0x0f) == 0x0e); 365 } 366 367 boolean isMCNodeLocal() { 368 return ((ipaddress[0] & 0xff) == 0xff 369 && (ipaddress[1] & 0x0f) == 0x01); 370 } 371 372 boolean isMCLinkLocal() { 373 return ((ipaddress[0] & 0xff) == 0xff 374 && (ipaddress[1] & 0x0f) == 0x02); 375 } 376 377 boolean isMCSiteLocal() { 378 return ((ipaddress[0] & 0xff) == 0xff 379 && (ipaddress[1] & 0x0f) == 0x05); 380 } 381 382 boolean isMCOrgLocal() { 383 return ((ipaddress[0] & 0xff) == 0xff 384 && (ipaddress[1] & 0x0f) == 0x08); 385 } 386 } 387 388 private final transient Inet6AddressHolder holder6; 389 390 private static final long serialVersionUID = 6880410070516793377L; 391 392 // BEGIN Android-removed: Android doesn't need to call native init 393 /* 394 // Perform native initialization 395 static { init(); } 396 // END Android-removed: Android doesn't need to call native init 397 */ 398 399 Inet6Address() { 400 super(); 401 holder.init(null, AF_INET6); 402 holder6 = new Inet6AddressHolder(); 403 } 404 405 /* checking of value for scope_id should be done by caller 406 * scope_id must be >= 0, or -1 to indicate not being set 407 */ 408 Inet6Address(String hostName, byte addr[], int scope_id) { 409 holder.init(hostName, AF_INET6); 410 holder6 = new Inet6AddressHolder(); 411 holder6.init(addr, scope_id); 412 } 413 414 Inet6Address(String hostName, byte addr[]) { 415 holder6 = new Inet6AddressHolder(); 416 try { 417 initif (hostName, addr, null); 418 } catch (UnknownHostException e) {} /* cant happen if ifname is null */ 419 } 420 421 Inet6Address (String hostName, byte addr[], NetworkInterface nif) 422 throws UnknownHostException 423 { 424 holder6 = new Inet6AddressHolder(); 425 initif (hostName, addr, nif); 426 } 427 428 Inet6Address (String hostName, byte addr[], String ifname) 429 throws UnknownHostException 430 { 431 holder6 = new Inet6AddressHolder(); 432 initstr (hostName, addr, ifname); 433 } 434 435 /** 436 * Create an Inet6Address in the exact manner of {@link 437 * InetAddress#getByAddress(String,byte[])} except that the IPv6 scope_id is 438 * set to the value corresponding to the given interface for the address 439 * type specified in {@code addr}. The call will fail with an 440 * UnknownHostException if the given interface does not have a numeric 441 * scope_id assigned for the given address type (eg. link-local or site-local). 442 * See <a href="Inet6Address.html#scoped">here</a> for a description of IPv6 443 * scoped addresses. 444 * 445 * @param host the specified host 446 * @param addr the raw IP address in network byte order 447 * @param nif an interface this address must be associated with. 448 * @return an Inet6Address object created from the raw IP address. 449 * @throws UnknownHostException 450 * if IP address is of illegal length, or if the interface does not 451 * have a numeric scope_id assigned for the given address type. 452 * 453 * @since 1.5 454 */ 455 public static Inet6Address getByAddress(String host, byte[] addr, 456 NetworkInterface nif) 457 throws UnknownHostException 458 { 459 if (host != null && host.length() > 0 && host.charAt(0) == '[') { 460 if (host.charAt(host.length()-1) == ']') { 461 host = host.substring(1, host.length() -1); 462 } 463 } 464 if (addr != null) { 465 if (addr.length == Inet6Address.INADDRSZ) { 466 return new Inet6Address(host, addr, nif); 467 } 468 } 469 throw new UnknownHostException("addr is of illegal length"); 470 } 471 472 /** 473 * Create an Inet6Address in the exact manner of {@link 474 * InetAddress#getByAddress(String,byte[])} except that the IPv6 scope_id is 475 * set to the given numeric value. The scope_id is not checked to determine 476 * if it corresponds to any interface on the system. 477 * See <a href="Inet6Address.html#scoped">here</a> for a description of IPv6 478 * scoped addresses. 479 * 480 * @param host the specified host 481 * @param addr the raw IP address in network byte order 482 * @param scope_id the numeric scope_id for the address. 483 * @return an Inet6Address object created from the raw IP address. 484 * @throws UnknownHostException if IP address is of illegal length. 485 * 486 * @since 1.5 487 */ 488 public static Inet6Address getByAddress(String host, byte[] addr, 489 int scope_id) 490 throws UnknownHostException 491 { 492 if (host != null && host.length() > 0 && host.charAt(0) == '[') { 493 if (host.charAt(host.length()-1) == ']') { 494 host = host.substring(1, host.length() -1); 495 } 496 } 497 if (addr != null) { 498 if (addr.length == Inet6Address.INADDRSZ) { 499 return new Inet6Address(host, addr, scope_id); 500 } 501 } 502 throw new UnknownHostException("addr is of illegal length"); 503 } 504 505 private void initstr(String hostName, byte addr[], String ifname) 506 throws UnknownHostException 507 { 508 try { 509 NetworkInterface nif = NetworkInterface.getByName (ifname); 510 if (nif == null) { 511 throw new UnknownHostException ("no such interface " + ifname); 512 } 513 initif (hostName, addr, nif); 514 } catch (SocketException e) { 515 throw new UnknownHostException ("SocketException thrown" + ifname); 516 } 517 } 518 519 private void initif(String hostName, byte addr[], NetworkInterface nif) 520 throws UnknownHostException 521 { 522 int family = -1; 523 holder6.init(addr, nif); 524 525 if (addr.length == INADDRSZ) { // normal IPv6 address 526 family = AF_INET6; 527 } 528 holder.init(hostName, family); 529 } 530 531 /* check the two Ipv6 addresses and return false if they are both 532 * non global address types, but not the same. 533 * (ie. one is sitelocal and the other linklocal) 534 * return true otherwise. 535 */ 536 537 private static boolean isDifferentLocalAddressType( 538 byte[] thisAddr, byte[] otherAddr) { 539 540 if (Inet6Address.isLinkLocalAddress(thisAddr) && 541 !Inet6Address.isLinkLocalAddress(otherAddr)) { 542 return false; 543 } 544 if (Inet6Address.isSiteLocalAddress(thisAddr) && 545 !Inet6Address.isSiteLocalAddress(otherAddr)) { 546 return false; 547 } 548 return true; 549 } 550 551 private static int deriveNumericScope (byte[] thisAddr, NetworkInterface ifc) throws UnknownHostException { 552 Enumeration<InetAddress> addresses = ifc.getInetAddresses(); 553 while (addresses.hasMoreElements()) { 554 InetAddress addr = addresses.nextElement(); 555 if (!(addr instanceof Inet6Address)) { 556 continue; 557 } 558 Inet6Address ia6_addr = (Inet6Address)addr; 559 /* check if site or link local prefixes match */ 560 if (!isDifferentLocalAddressType(thisAddr, ia6_addr.getAddress())){ 561 /* type not the same, so carry on searching */ 562 continue; 563 } 564 /* found a matching address - return its scope_id */ 565 return ia6_addr.getScopeId(); 566 } 567 throw new UnknownHostException ("no scope_id found"); 568 } 569 570 private int deriveNumericScope (String ifname) throws UnknownHostException { 571 Enumeration<NetworkInterface> en; 572 try { 573 en = NetworkInterface.getNetworkInterfaces(); 574 } catch (SocketException e) { 575 throw new UnknownHostException ("could not enumerate local network interfaces"); 576 } 577 while (en.hasMoreElements()) { 578 NetworkInterface ifc = en.nextElement(); 579 if (ifc.getName().equals (ifname)) { 580 return deriveNumericScope(holder6.ipaddress, ifc); 581 } 582 } 583 throw new UnknownHostException ("No matching address found for interface : " +ifname); 584 } 585 586 /** 587 * @serialField ipaddress byte[] 588 * @serialField scope_id int 589 * @serialField scope_id_set boolean 590 * @serialField scope_ifname_set boolean 591 * @serialField ifname String 592 */ 593 594 private static final ObjectStreamField[] serialPersistentFields = { 595 new ObjectStreamField("ipaddress", byte[].class), 596 new ObjectStreamField("scope_id", int.class), 597 new ObjectStreamField("scope_id_set", boolean.class), 598 new ObjectStreamField("scope_ifname_set", boolean.class), 599 new ObjectStreamField("ifname", String.class) 600 }; 601 602 private static final long FIELDS_OFFSET; 603 private static final sun.misc.Unsafe UNSAFE; 604 605 static { 606 try { 607 sun.misc.Unsafe unsafe = sun.misc.Unsafe.getUnsafe(); 608 FIELDS_OFFSET = unsafe.objectFieldOffset( 609 Inet6Address.class.getDeclaredField("holder6")); 610 UNSAFE = unsafe; 611 } catch (ReflectiveOperationException e) { 612 throw new Error(e); 613 } 614 } 615 616 /** 617 * restore the state of this object from stream 618 * including the scope information, only if the 619 * scoped interface name is valid on this system 620 */ 621 private void readObject(ObjectInputStream s) 622 throws IOException, ClassNotFoundException { 623 NetworkInterface scope_ifname = null; 624 625 // Android-changed: was getClass().getClassLoader() != null 626 if (getClass().getClassLoader() != Class.class.getClassLoader()) { 627 throw new SecurityException ("invalid address type"); 628 } 629 630 ObjectInputStream.GetField gf = s.readFields(); 631 byte[] ipaddress = (byte[])gf.get("ipaddress", null); 632 int scope_id = (int)gf.get("scope_id", -1); 633 boolean scope_id_set = (boolean)gf.get("scope_id_set", false); 634 boolean scope_ifname_set = (boolean)gf.get("scope_ifname_set", false); 635 String ifname = (String)gf.get("ifname", null); 636 637 if (ifname != null && !"".equals (ifname)) { 638 try { 639 scope_ifname = NetworkInterface.getByName(ifname); 640 if (scope_ifname == null) { 641 /* the interface does not exist on this system, so we clear 642 * the scope information completely */ 643 scope_id_set = false; 644 scope_ifname_set = false; 645 scope_id = 0; 646 } else { 647 scope_ifname_set = true; 648 try { 649 scope_id = deriveNumericScope (ipaddress, scope_ifname); 650 } catch (UnknownHostException e) { 651 // typically should not happen, but it may be that 652 // the machine being used for deserialization has 653 // the same interface name but without IPv6 configured. 654 } 655 } 656 } catch (SocketException e) {} 657 } 658 659 /* if ifname was not supplied, then the numeric info is used */ 660 661 ipaddress = ipaddress.clone(); 662 663 // Check that our invariants are satisfied 664 if (ipaddress.length != INADDRSZ) { 665 throw new InvalidObjectException("invalid address length: "+ 666 ipaddress.length); 667 } 668 669 if (holder().getFamily() != AF_INET6) { 670 throw new InvalidObjectException("invalid address family type"); 671 } 672 673 Inet6AddressHolder h = new Inet6AddressHolder( 674 ipaddress, scope_id, scope_id_set, scope_ifname, scope_ifname_set 675 ); 676 677 UNSAFE.putObject(this, FIELDS_OFFSET, h); 678 } 679 680 /** 681 * default behavior is overridden in order to write the 682 * scope_ifname field as a String, rather than a NetworkInterface 683 * which is not serializable 684 */ 685 private synchronized void writeObject(ObjectOutputStream s) 686 throws IOException 687 { 688 String ifname = null; 689 690 if (holder6.scope_ifname != null) { 691 ifname = holder6.scope_ifname.getName(); 692 holder6.scope_ifname_set = true; 693 } 694 ObjectOutputStream.PutField pfields = s.putFields(); 695 pfields.put("ipaddress", holder6.ipaddress); 696 pfields.put("scope_id", holder6.scope_id); 697 pfields.put("scope_id_set", holder6.scope_id_set); 698 pfields.put("scope_ifname_set", holder6.scope_ifname_set); 699 pfields.put("ifname", ifname); 700 s.writeFields(); 701 } 702 703 /** 704 * Utility routine to check if the InetAddress is an IP multicast 705 * address. 11111111 at the start of the address identifies the 706 * address as being a multicast address. 707 * 708 * @return a {@code boolean} indicating if the InetAddress is an IP 709 * multicast address 710 * 711 * @since JDK1.1 712 */ 713 @Override 714 public boolean isMulticastAddress() { 715 return holder6.isMulticastAddress(); 716 } 717 718 /** 719 * Utility routine to check if the InetAddress in a wildcard address. 720 * 721 * @return a {@code boolean} indicating if the Inetaddress is 722 * a wildcard address. 723 * 724 * @since 1.4 725 */ 726 @Override 727 public boolean isAnyLocalAddress() { 728 return holder6.isAnyLocalAddress(); 729 } 730 731 /** 732 * Utility routine to check if the InetAddress is a loopback address. 733 * 734 * @return a {@code boolean} indicating if the InetAddress is a loopback 735 * address; or false otherwise. 736 * 737 * @since 1.4 738 */ 739 @Override 740 public boolean isLoopbackAddress() { 741 return holder6.isLoopbackAddress(); 742 } 743 744 /** 745 * Utility routine to check if the InetAddress is an link local address. 746 * 747 * @return a {@code boolean} indicating if the InetAddress is a link local 748 * address; or false if address is not a link local unicast address. 749 * 750 * @since 1.4 751 */ 752 @Override 753 public boolean isLinkLocalAddress() { 754 return holder6.isLinkLocalAddress(); 755 } 756 757 /* static version of above */ 758 static boolean isLinkLocalAddress(byte[] ipaddress) { 759 return ((ipaddress[0] & 0xff) == 0xfe 760 && (ipaddress[1] & 0xc0) == 0x80); 761 } 762 763 /** 764 * Utility routine to check if the InetAddress is a site local address. 765 * 766 * @return a {@code boolean} indicating if the InetAddress is a site local 767 * address; or false if address is not a site local unicast address. 768 * 769 * @since 1.4 770 */ 771 @Override 772 public boolean isSiteLocalAddress() { 773 return holder6.isSiteLocalAddress(); 774 } 775 776 /* static version of above */ 777 static boolean isSiteLocalAddress(byte[] ipaddress) { 778 return ((ipaddress[0] & 0xff) == 0xfe 779 && (ipaddress[1] & 0xc0) == 0xc0); 780 } 781 782 /** 783 * Utility routine to check if the multicast address has global scope. 784 * 785 * @return a {@code boolean} indicating if the address has is a multicast 786 * address of global scope, false if it is not of global scope or 787 * it is not a multicast address 788 * 789 * @since 1.4 790 */ 791 @Override 792 public boolean isMCGlobal() { 793 return holder6.isMCGlobal(); 794 } 795 796 /** 797 * Utility routine to check if the multicast address has node scope. 798 * 799 * @return a {@code boolean} indicating if the address has is a multicast 800 * address of node-local scope, false if it is not of node-local 801 * scope or it is not a multicast address 802 * 803 * @since 1.4 804 */ 805 @Override 806 public boolean isMCNodeLocal() { 807 return holder6.isMCNodeLocal(); 808 } 809 810 /** 811 * Utility routine to check if the multicast address has link scope. 812 * 813 * @return a {@code boolean} indicating if the address has is a multicast 814 * address of link-local scope, false if it is not of link-local 815 * scope or it is not a multicast address 816 * 817 * @since 1.4 818 */ 819 @Override 820 public boolean isMCLinkLocal() { 821 return holder6.isMCLinkLocal(); 822 } 823 824 /** 825 * Utility routine to check if the multicast address has site scope. 826 * 827 * @return a {@code boolean} indicating if the address has is a multicast 828 * address of site-local scope, false if it is not of site-local 829 * scope or it is not a multicast address 830 * 831 * @since 1.4 832 */ 833 @Override 834 public boolean isMCSiteLocal() { 835 return holder6.isMCSiteLocal(); 836 } 837 838 /** 839 * Utility routine to check if the multicast address has organization scope. 840 * 841 * @return a {@code boolean} indicating if the address has is a multicast 842 * address of organization-local scope, false if it is not of 843 * organization-local scope or it is not a multicast address 844 * 845 * @since 1.4 846 */ 847 @Override 848 public boolean isMCOrgLocal() { 849 return holder6.isMCOrgLocal(); 850 } 851 /** 852 * Returns the raw IP address of this {@code InetAddress} object. The result 853 * is in network byte order: the highest order byte of the address is in 854 * {@code getAddress()[0]}. 855 * 856 * @return the raw IP address of this object. 857 */ 858 @Override 859 public byte[] getAddress() { 860 return holder6.ipaddress.clone(); 861 } 862 863 /** 864 * Returns the numeric scopeId, if this instance is associated with 865 * an interface. If no scoped_id is set, the returned value is zero. 866 * 867 * @return the scopeId, or zero if not set. 868 * 869 * @since 1.5 870 */ 871 public int getScopeId() { 872 return holder6.scope_id; 873 } 874 875 /** 876 * Returns the scoped interface, if this instance was created with 877 * with a scoped interface. 878 * 879 * @return the scoped interface, or null if not set. 880 * @since 1.5 881 */ 882 public NetworkInterface getScopedInterface() { 883 return holder6.scope_ifname; 884 } 885 886 /** 887 * Returns the IP address string in textual presentation. If the instance 888 * was created specifying a scope identifier then the scope id is appended 889 * to the IP address preceded by a "%" (per-cent) character. This can be 890 * either a numeric value or a string, depending on which was used to create 891 * the instance. 892 * 893 * @return the raw IP address in a string format. 894 */ 895 @Override 896 public String getHostAddress() { 897 // Android-changed: getnameinfo returns smarter representations than getHostAddress() 898 // return holder6.getHostAddress(); 899 return Libcore.os.getnameinfo(this, NI_NUMERICHOST); // Can't throw. 900 } 901 902 /** 903 * Returns a hashcode for this IP address. 904 * 905 * @return a hash code value for this IP address. 906 */ 907 @Override 908 public int hashCode() { 909 return holder6.hashCode(); 910 } 911 912 /** 913 * Compares this object against the specified object. The result is {@code 914 * true} if and only if the argument is not {@code null} and it represents 915 * the same IP address as this object. 916 * 917 * <p> Two instances of {@code InetAddress} represent the same IP address 918 * if the length of the byte arrays returned by {@code getAddress} is the 919 * same for both, and each of the array components is the same for the byte 920 * arrays. 921 * 922 * @param obj the object to compare against. 923 * 924 * @return {@code true} if the objects are the same; {@code false} otherwise. 925 * 926 * @see java.net.InetAddress#getAddress() 927 */ 928 @Override 929 public boolean equals(Object obj) { 930 if (obj == null || !(obj instanceof Inet6Address)) 931 return false; 932 933 Inet6Address inetAddr = (Inet6Address)obj; 934 935 return holder6.equals(inetAddr.holder6); 936 } 937 938 /** 939 * Utility routine to check if the InetAddress is an 940 * IPv4 compatible IPv6 address. 941 * 942 * @return a {@code boolean} indicating if the InetAddress is an IPv4 943 * compatible IPv6 address; or false if address is IPv4 address. 944 * 945 * @since 1.4 946 */ 947 public boolean isIPv4CompatibleAddress() { 948 return holder6.isIPv4CompatibleAddress(); 949 } 950 951 // Utilities 952 private final static int INT16SZ = 2; 953 954 /* 955 * Convert IPv6 binary address into presentation (printable) format. 956 * 957 * @param src a byte array representing the IPv6 numeric address 958 * @return a String representing an IPv6 address in 959 * textual representation format 960 * @since 1.4 961 */ 962 static String numericToTextFormat(byte[] src) { 963 StringBuilder sb = new StringBuilder(39); 964 for (int i = 0; i < (INADDRSZ / INT16SZ); i++) { 965 sb.append(Integer.toHexString(((src[i<<1]<<8) & 0xff00) 966 | (src[(i<<1)+1] & 0xff))); 967 if (i < (INADDRSZ / INT16SZ) -1 ) { 968 sb.append(":"); 969 } 970 } 971 return sb.toString(); 972 } 973 974 // BEGIN Android-removed: Android doesn't need to call native init 975 /* 976 * Perform class load-time initializations. 977 * 978 private static native void init(); 979 */ 980 // END Android-removed: Android doesn't need to call native init 981 } 982