1 // Copyright 2013 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "url/url_canon_ip.h" 6 7 #include <stdlib.h> 8 9 #include "base/basictypes.h" 10 #include "base/logging.h" 11 #include "url/url_canon_internal.h" 12 13 namespace url { 14 15 namespace { 16 17 // Converts one of the character types that represent a numerical base to the 18 // corresponding base. 19 int BaseForType(SharedCharTypes type) { 20 switch (type) { 21 case CHAR_HEX: 22 return 16; 23 case CHAR_DEC: 24 return 10; 25 case CHAR_OCT: 26 return 8; 27 default: 28 return 0; 29 } 30 } 31 32 template<typename CHAR, typename UCHAR> 33 bool DoFindIPv4Components(const CHAR* spec, 34 const Component& host, 35 Component components[4]) { 36 if (!host.is_nonempty()) 37 return false; 38 39 int cur_component = 0; // Index of the component we're working on. 40 int cur_component_begin = host.begin; // Start of the current component. 41 int end = host.end(); 42 for (int i = host.begin; /* nothing */; i++) { 43 if (i >= end || spec[i] == '.') { 44 // Found the end of the current component. 45 int component_len = i - cur_component_begin; 46 components[cur_component] = Component(cur_component_begin, component_len); 47 48 // The next component starts after the dot. 49 cur_component_begin = i + 1; 50 cur_component++; 51 52 // Don't allow empty components (two dots in a row), except we may 53 // allow an empty component at the end (this would indicate that the 54 // input ends in a dot). We also want to error if the component is 55 // empty and it's the only component (cur_component == 1). 56 if (component_len == 0 && (i < end || cur_component == 1)) 57 return false; 58 59 if (i >= end) 60 break; // End of the input. 61 62 if (cur_component == 4) { 63 // Anything else after the 4th component is an error unless it is a 64 // dot that would otherwise be treated as the end of input. 65 if (spec[i] == '.' && i + 1 == end) 66 break; 67 return false; 68 } 69 } else if (static_cast<UCHAR>(spec[i]) >= 0x80 || 70 !IsIPv4Char(static_cast<unsigned char>(spec[i]))) { 71 // Invalid character for an IPv4 address. 72 return false; 73 } 74 } 75 76 // Fill in any unused components. 77 while (cur_component < 4) 78 components[cur_component++] = Component(); 79 return true; 80 } 81 82 // Converts an IPv4 component to a 32-bit number, while checking for overflow. 83 // 84 // Possible return values: 85 // - IPV4 - The number was valid, and did not overflow. 86 // - BROKEN - The input was numeric, but too large for a 32-bit field. 87 // - NEUTRAL - Input was not numeric. 88 // 89 // The input is assumed to be ASCII. FindIPv4Components should have stripped 90 // out any input that is greater than 7 bits. The components are assumed 91 // to be non-empty. 92 template<typename CHAR> 93 CanonHostInfo::Family IPv4ComponentToNumber(const CHAR* spec, 94 const Component& component, 95 uint32* number) { 96 // Figure out the base 97 SharedCharTypes base; 98 int base_prefix_len = 0; // Size of the prefix for this base. 99 if (spec[component.begin] == '0') { 100 // Either hex or dec, or a standalone zero. 101 if (component.len == 1) { 102 base = CHAR_DEC; 103 } else if (spec[component.begin + 1] == 'X' || 104 spec[component.begin + 1] == 'x') { 105 base = CHAR_HEX; 106 base_prefix_len = 2; 107 } else { 108 base = CHAR_OCT; 109 base_prefix_len = 1; 110 } 111 } else { 112 base = CHAR_DEC; 113 } 114 115 // Extend the prefix to consume all leading zeros. 116 while (base_prefix_len < component.len && 117 spec[component.begin + base_prefix_len] == '0') 118 base_prefix_len++; 119 120 // Put the component, minus any base prefix, into a NULL-terminated buffer so 121 // we can call the standard library. Because leading zeros have already been 122 // discarded, filling the entire buffer is guaranteed to trigger the 32-bit 123 // overflow check. 124 const int kMaxComponentLen = 16; 125 char buf[kMaxComponentLen + 1]; // digits + '\0' 126 int dest_i = 0; 127 for (int i = component.begin + base_prefix_len; i < component.end(); i++) { 128 // We know the input is 7-bit, so convert to narrow (if this is the wide 129 // version of the template) by casting. 130 char input = static_cast<char>(spec[i]); 131 132 // Validate that this character is OK for the given base. 133 if (!IsCharOfType(input, base)) 134 return CanonHostInfo::NEUTRAL; 135 136 // Fill the buffer, if there's space remaining. This check allows us to 137 // verify that all characters are numeric, even those that don't fit. 138 if (dest_i < kMaxComponentLen) 139 buf[dest_i++] = input; 140 } 141 142 buf[dest_i] = '\0'; 143 144 // Use the 64-bit strtoi so we get a big number (no hex, decimal, or octal 145 // number can overflow a 64-bit number in <= 16 characters). 146 uint64 num = _strtoui64(buf, NULL, BaseForType(base)); 147 148 // Check for 32-bit overflow. 149 if (num > kuint32max) 150 return CanonHostInfo::BROKEN; 151 152 // No overflow. Success! 153 *number = static_cast<uint32>(num); 154 return CanonHostInfo::IPV4; 155 } 156 157 // See declaration of IPv4AddressToNumber for documentation. 158 template<typename CHAR> 159 CanonHostInfo::Family DoIPv4AddressToNumber(const CHAR* spec, 160 const Component& host, 161 unsigned char address[4], 162 int* num_ipv4_components) { 163 // The identified components. Not all may exist. 164 Component components[4]; 165 if (!FindIPv4Components(spec, host, components)) 166 return CanonHostInfo::NEUTRAL; 167 168 // Convert existing components to digits. Values up to 169 // |existing_components| will be valid. 170 uint32 component_values[4]; 171 int existing_components = 0; 172 173 // Set to true if one or more components are BROKEN. BROKEN is only 174 // returned if all components are IPV4 or BROKEN, so, for example, 175 // 12345678912345.de returns NEUTRAL rather than broken. 176 bool broken = false; 177 for (int i = 0; i < 4; i++) { 178 if (components[i].len <= 0) 179 continue; 180 CanonHostInfo::Family family = IPv4ComponentToNumber( 181 spec, components[i], &component_values[existing_components]); 182 183 if (family == CanonHostInfo::BROKEN) { 184 broken = true; 185 } else if (family != CanonHostInfo::IPV4) { 186 // Stop if we hit a non-BROKEN invalid non-empty component. 187 return family; 188 } 189 190 existing_components++; 191 } 192 193 if (broken) 194 return CanonHostInfo::BROKEN; 195 196 // Use that sequence of numbers to fill out the 4-component IP address. 197 198 // First, process all components but the last, while making sure each fits 199 // within an 8-bit field. 200 for (int i = 0; i < existing_components - 1; i++) { 201 if (component_values[i] > kuint8max) 202 return CanonHostInfo::BROKEN; 203 address[i] = static_cast<unsigned char>(component_values[i]); 204 } 205 206 // Next, consume the last component to fill in the remaining bytes. 207 uint32 last_value = component_values[existing_components - 1]; 208 for (int i = 3; i >= existing_components - 1; i--) { 209 address[i] = static_cast<unsigned char>(last_value); 210 last_value >>= 8; 211 } 212 213 // If the last component has residual bits, report overflow. 214 if (last_value != 0) 215 return CanonHostInfo::BROKEN; 216 217 // Tell the caller how many components we saw. 218 *num_ipv4_components = existing_components; 219 220 // Success! 221 return CanonHostInfo::IPV4; 222 } 223 224 // Return true if we've made a final IPV4/BROKEN decision, false if the result 225 // is NEUTRAL, and we could use a second opinion. 226 template<typename CHAR, typename UCHAR> 227 bool DoCanonicalizeIPv4Address(const CHAR* spec, 228 const Component& host, 229 CanonOutput* output, 230 CanonHostInfo* host_info) { 231 host_info->family = IPv4AddressToNumber( 232 spec, host, host_info->address, &host_info->num_ipv4_components); 233 234 switch (host_info->family) { 235 case CanonHostInfo::IPV4: 236 // Definitely an IPv4 address. 237 host_info->out_host.begin = output->length(); 238 AppendIPv4Address(host_info->address, output); 239 host_info->out_host.len = output->length() - host_info->out_host.begin; 240 return true; 241 case CanonHostInfo::BROKEN: 242 // Definitely broken. 243 return true; 244 default: 245 // Could be IPv6 or a hostname. 246 return false; 247 } 248 } 249 250 // Helper class that describes the main components of an IPv6 input string. 251 // See the following examples to understand how it breaks up an input string: 252 // 253 // [Example 1]: input = "[::aa:bb]" 254 // ==> num_hex_components = 2 255 // ==> hex_components[0] = Component(3,2) "aa" 256 // ==> hex_components[1] = Component(6,2) "bb" 257 // ==> index_of_contraction = 0 258 // ==> ipv4_component = Component(0, -1) 259 // 260 // [Example 2]: input = "[1:2::3:4:5]" 261 // ==> num_hex_components = 5 262 // ==> hex_components[0] = Component(1,1) "1" 263 // ==> hex_components[1] = Component(3,1) "2" 264 // ==> hex_components[2] = Component(6,1) "3" 265 // ==> hex_components[3] = Component(8,1) "4" 266 // ==> hex_components[4] = Component(10,1) "5" 267 // ==> index_of_contraction = 2 268 // ==> ipv4_component = Component(0, -1) 269 // 270 // [Example 3]: input = "[::ffff:192.168.0.1]" 271 // ==> num_hex_components = 1 272 // ==> hex_components[0] = Component(3,4) "ffff" 273 // ==> index_of_contraction = 0 274 // ==> ipv4_component = Component(8, 11) "192.168.0.1" 275 // 276 // [Example 4]: input = "[1::]" 277 // ==> num_hex_components = 1 278 // ==> hex_components[0] = Component(1,1) "1" 279 // ==> index_of_contraction = 1 280 // ==> ipv4_component = Component(0, -1) 281 // 282 // [Example 5]: input = "[::192.168.0.1]" 283 // ==> num_hex_components = 0 284 // ==> index_of_contraction = 0 285 // ==> ipv4_component = Component(8, 11) "192.168.0.1" 286 // 287 struct IPv6Parsed { 288 // Zero-out the parse information. 289 void reset() { 290 num_hex_components = 0; 291 index_of_contraction = -1; 292 ipv4_component.reset(); 293 } 294 295 // There can be up to 8 hex components (colon separated) in the literal. 296 Component hex_components[8]; 297 298 // The count of hex components present. Ranges from [0,8]. 299 int num_hex_components; 300 301 // The index of the hex component that the "::" contraction precedes, or 302 // -1 if there is no contraction. 303 int index_of_contraction; 304 305 // The range of characters which are an IPv4 literal. 306 Component ipv4_component; 307 }; 308 309 // Parse the IPv6 input string. If parsing succeeded returns true and fills 310 // |parsed| with the information. If parsing failed (because the input is 311 // invalid) returns false. 312 template<typename CHAR, typename UCHAR> 313 bool DoParseIPv6(const CHAR* spec, const Component& host, IPv6Parsed* parsed) { 314 // Zero-out the info. 315 parsed->reset(); 316 317 if (!host.is_nonempty()) 318 return false; 319 320 // The index for start and end of address range (no brackets). 321 int begin = host.begin; 322 int end = host.end(); 323 324 int cur_component_begin = begin; // Start of the current component. 325 326 // Scan through the input, searching for hex components, "::" contractions, 327 // and IPv4 components. 328 for (int i = begin; /* i <= end */; i++) { 329 bool is_colon = spec[i] == ':'; 330 bool is_contraction = is_colon && i < end - 1 && spec[i + 1] == ':'; 331 332 // We reached the end of the current component if we encounter a colon 333 // (separator between hex components, or start of a contraction), or end of 334 // input. 335 if (is_colon || i == end) { 336 int component_len = i - cur_component_begin; 337 338 // A component should not have more than 4 hex digits. 339 if (component_len > 4) 340 return false; 341 342 // Don't allow empty components. 343 if (component_len == 0) { 344 // The exception is when contractions appear at beginning of the 345 // input or at the end of the input. 346 if (!((is_contraction && i == begin) || (i == end && 347 parsed->index_of_contraction == parsed->num_hex_components))) 348 return false; 349 } 350 351 // Add the hex component we just found to running list. 352 if (component_len > 0) { 353 // Can't have more than 8 components! 354 if (parsed->num_hex_components >= 8) 355 return false; 356 357 parsed->hex_components[parsed->num_hex_components++] = 358 Component(cur_component_begin, component_len); 359 } 360 } 361 362 if (i == end) 363 break; // Reached the end of the input, DONE. 364 365 // We found a "::" contraction. 366 if (is_contraction) { 367 // There can be at most one contraction in the literal. 368 if (parsed->index_of_contraction != -1) 369 return false; 370 parsed->index_of_contraction = parsed->num_hex_components; 371 ++i; // Consume the colon we peeked. 372 } 373 374 if (is_colon) { 375 // Colons are separators between components, keep track of where the 376 // current component started (after this colon). 377 cur_component_begin = i + 1; 378 } else { 379 if (static_cast<UCHAR>(spec[i]) >= 0x80) 380 return false; // Not ASCII. 381 382 if (!IsHexChar(static_cast<unsigned char>(spec[i]))) { 383 // Regular components are hex numbers. It is also possible for 384 // a component to be an IPv4 address in dotted form. 385 if (IsIPv4Char(static_cast<unsigned char>(spec[i]))) { 386 // Since IPv4 address can only appear at the end, assume the rest 387 // of the string is an IPv4 address. (We will parse this separately 388 // later). 389 parsed->ipv4_component = 390 Component(cur_component_begin, end - cur_component_begin); 391 break; 392 } else { 393 // The character was neither a hex digit, nor an IPv4 character. 394 return false; 395 } 396 } 397 } 398 } 399 400 return true; 401 } 402 403 // Verifies the parsed IPv6 information, checking that the various components 404 // add up to the right number of bits (hex components are 16 bits, while 405 // embedded IPv4 formats are 32 bits, and contractions are placeholdes for 406 // 16 or more bits). Returns true if sizes match up, false otherwise. On 407 // success writes the length of the contraction (if any) to 408 // |out_num_bytes_of_contraction|. 409 bool CheckIPv6ComponentsSize(const IPv6Parsed& parsed, 410 int* out_num_bytes_of_contraction) { 411 // Each group of four hex digits contributes 16 bits. 412 int num_bytes_without_contraction = parsed.num_hex_components * 2; 413 414 // If an IPv4 address was embedded at the end, it contributes 32 bits. 415 if (parsed.ipv4_component.is_valid()) 416 num_bytes_without_contraction += 4; 417 418 // If there was a "::" contraction, its size is going to be: 419 // MAX([16bits], [128bits] - num_bytes_without_contraction). 420 int num_bytes_of_contraction = 0; 421 if (parsed.index_of_contraction != -1) { 422 num_bytes_of_contraction = 16 - num_bytes_without_contraction; 423 if (num_bytes_of_contraction < 2) 424 num_bytes_of_contraction = 2; 425 } 426 427 // Check that the numbers add up. 428 if (num_bytes_without_contraction + num_bytes_of_contraction != 16) 429 return false; 430 431 *out_num_bytes_of_contraction = num_bytes_of_contraction; 432 return true; 433 } 434 435 // Converts a hex comonent into a number. This cannot fail since the caller has 436 // already verified that each character in the string was a hex digit, and 437 // that there were no more than 4 characters. 438 template<typename CHAR> 439 uint16 IPv6HexComponentToNumber(const CHAR* spec, const Component& component) { 440 DCHECK(component.len <= 4); 441 442 // Copy the hex string into a C-string. 443 char buf[5]; 444 for (int i = 0; i < component.len; ++i) 445 buf[i] = static_cast<char>(spec[component.begin + i]); 446 buf[component.len] = '\0'; 447 448 // Convert it to a number (overflow is not possible, since with 4 hex 449 // characters we can at most have a 16 bit number). 450 return static_cast<uint16>(_strtoui64(buf, NULL, 16)); 451 } 452 453 // Converts an IPv6 address to a 128-bit number (network byte order), returning 454 // true on success. False means that the input was not a valid IPv6 address. 455 template<typename CHAR, typename UCHAR> 456 bool DoIPv6AddressToNumber(const CHAR* spec, 457 const Component& host, 458 unsigned char address[16]) { 459 // Make sure the component is bounded by '[' and ']'. 460 int end = host.end(); 461 if (!host.is_nonempty() || spec[host.begin] != '[' || spec[end - 1] != ']') 462 return false; 463 464 // Exclude the square brackets. 465 Component ipv6_comp(host.begin + 1, host.len - 2); 466 467 // Parse the IPv6 address -- identify where all the colon separated hex 468 // components are, the "::" contraction, and the embedded IPv4 address. 469 IPv6Parsed ipv6_parsed; 470 if (!DoParseIPv6<CHAR, UCHAR>(spec, ipv6_comp, &ipv6_parsed)) 471 return false; 472 473 // Do some basic size checks to make sure that the address doesn't 474 // specify more than 128 bits or fewer than 128 bits. This also resolves 475 // how may zero bytes the "::" contraction represents. 476 int num_bytes_of_contraction; 477 if (!CheckIPv6ComponentsSize(ipv6_parsed, &num_bytes_of_contraction)) 478 return false; 479 480 int cur_index_in_address = 0; 481 482 // Loop through each hex components, and contraction in order. 483 for (int i = 0; i <= ipv6_parsed.num_hex_components; ++i) { 484 // Append the contraction if it appears before this component. 485 if (i == ipv6_parsed.index_of_contraction) { 486 for (int j = 0; j < num_bytes_of_contraction; ++j) 487 address[cur_index_in_address++] = 0; 488 } 489 // Append the hex component's value. 490 if (i != ipv6_parsed.num_hex_components) { 491 // Get the 16-bit value for this hex component. 492 uint16 number = IPv6HexComponentToNumber<CHAR>( 493 spec, ipv6_parsed.hex_components[i]); 494 // Append to |address|, in network byte order. 495 address[cur_index_in_address++] = (number & 0xFF00) >> 8; 496 address[cur_index_in_address++] = (number & 0x00FF); 497 } 498 } 499 500 // If there was an IPv4 section, convert it into a 32-bit number and append 501 // it to |address|. 502 if (ipv6_parsed.ipv4_component.is_valid()) { 503 // Append the 32-bit number to |address|. 504 int ignored_num_ipv4_components; 505 if (CanonHostInfo::IPV4 != 506 IPv4AddressToNumber(spec, 507 ipv6_parsed.ipv4_component, 508 &address[cur_index_in_address], 509 &ignored_num_ipv4_components)) 510 return false; 511 } 512 513 return true; 514 } 515 516 // Searches for the longest sequence of zeros in |address|, and writes the 517 // range into |contraction_range|. The run of zeros must be at least 16 bits, 518 // and if there is a tie the first is chosen. 519 void ChooseIPv6ContractionRange(const unsigned char address[16], 520 Component* contraction_range) { 521 // The longest run of zeros in |address| seen so far. 522 Component max_range; 523 524 // The current run of zeros in |address| being iterated over. 525 Component cur_range; 526 527 for (int i = 0; i < 16; i += 2) { 528 // Test for 16 bits worth of zero. 529 bool is_zero = (address[i] == 0 && address[i + 1] == 0); 530 531 if (is_zero) { 532 // Add the zero to the current range (or start a new one). 533 if (!cur_range.is_valid()) 534 cur_range = Component(i, 0); 535 cur_range.len += 2; 536 } 537 538 if (!is_zero || i == 14) { 539 // Just completed a run of zeros. If the run is greater than 16 bits, 540 // it is a candidate for the contraction. 541 if (cur_range.len > 2 && cur_range.len > max_range.len) { 542 max_range = cur_range; 543 } 544 cur_range.reset(); 545 } 546 } 547 *contraction_range = max_range; 548 } 549 550 // Return true if we've made a final IPV6/BROKEN decision, false if the result 551 // is NEUTRAL, and we could use a second opinion. 552 template<typename CHAR, typename UCHAR> 553 bool DoCanonicalizeIPv6Address(const CHAR* spec, 554 const Component& host, 555 CanonOutput* output, 556 CanonHostInfo* host_info) { 557 // Turn the IP address into a 128 bit number. 558 if (!IPv6AddressToNumber(spec, host, host_info->address)) { 559 // If it's not an IPv6 address, scan for characters that should *only* 560 // exist in an IPv6 address. 561 for (int i = host.begin; i < host.end(); i++) { 562 switch (spec[i]) { 563 case '[': 564 case ']': 565 case ':': 566 host_info->family = CanonHostInfo::BROKEN; 567 return true; 568 } 569 } 570 571 // No invalid characters. Could still be IPv4 or a hostname. 572 host_info->family = CanonHostInfo::NEUTRAL; 573 return false; 574 } 575 576 host_info->out_host.begin = output->length(); 577 output->push_back('['); 578 AppendIPv6Address(host_info->address, output); 579 output->push_back(']'); 580 host_info->out_host.len = output->length() - host_info->out_host.begin; 581 582 host_info->family = CanonHostInfo::IPV6; 583 return true; 584 } 585 586 } // namespace 587 588 void AppendIPv4Address(const unsigned char address[4], CanonOutput* output) { 589 for (int i = 0; i < 4; i++) { 590 char str[16]; 591 _itoa_s(address[i], str, 10); 592 593 for (int ch = 0; str[ch] != 0; ch++) 594 output->push_back(str[ch]); 595 596 if (i != 3) 597 output->push_back('.'); 598 } 599 } 600 601 void AppendIPv6Address(const unsigned char address[16], CanonOutput* output) { 602 // We will output the address according to the rules in: 603 // http://tools.ietf.org/html/draft-kawamura-ipv6-text-representation-01#section-4 604 605 // Start by finding where to place the "::" contraction (if any). 606 Component contraction_range; 607 ChooseIPv6ContractionRange(address, &contraction_range); 608 609 for (int i = 0; i <= 14;) { 610 // We check 2 bytes at a time, from bytes (0, 1) to (14, 15), inclusive. 611 DCHECK(i % 2 == 0); 612 if (i == contraction_range.begin && contraction_range.len > 0) { 613 // Jump over the contraction. 614 if (i == 0) 615 output->push_back(':'); 616 output->push_back(':'); 617 i = contraction_range.end(); 618 } else { 619 // Consume the next 16 bits from |address|. 620 int x = address[i] << 8 | address[i + 1]; 621 622 i += 2; 623 624 // Stringify the 16 bit number (at most requires 4 hex digits). 625 char str[5]; 626 _itoa_s(x, str, 16); 627 for (int ch = 0; str[ch] != 0; ++ch) 628 output->push_back(str[ch]); 629 630 // Put a colon after each number, except the last. 631 if (i < 16) 632 output->push_back(':'); 633 } 634 } 635 } 636 637 bool FindIPv4Components(const char* spec, 638 const Component& host, 639 Component components[4]) { 640 return DoFindIPv4Components<char, unsigned char>(spec, host, components); 641 } 642 643 bool FindIPv4Components(const base::char16* spec, 644 const Component& host, 645 Component components[4]) { 646 return DoFindIPv4Components<base::char16, base::char16>( 647 spec, host, components); 648 } 649 650 void CanonicalizeIPAddress(const char* spec, 651 const Component& host, 652 CanonOutput* output, 653 CanonHostInfo* host_info) { 654 if (DoCanonicalizeIPv4Address<char, unsigned char>( 655 spec, host, output, host_info)) 656 return; 657 if (DoCanonicalizeIPv6Address<char, unsigned char>( 658 spec, host, output, host_info)) 659 return; 660 } 661 662 void CanonicalizeIPAddress(const base::char16* spec, 663 const Component& host, 664 CanonOutput* output, 665 CanonHostInfo* host_info) { 666 if (DoCanonicalizeIPv4Address<base::char16, base::char16>( 667 spec, host, output, host_info)) 668 return; 669 if (DoCanonicalizeIPv6Address<base::char16, base::char16>( 670 spec, host, output, host_info)) 671 return; 672 } 673 674 CanonHostInfo::Family IPv4AddressToNumber(const char* spec, 675 const Component& host, 676 unsigned char address[4], 677 int* num_ipv4_components) { 678 return DoIPv4AddressToNumber<char>(spec, host, address, num_ipv4_components); 679 } 680 681 CanonHostInfo::Family IPv4AddressToNumber(const base::char16* spec, 682 const Component& host, 683 unsigned char address[4], 684 int* num_ipv4_components) { 685 return DoIPv4AddressToNumber<base::char16>( 686 spec, host, address, num_ipv4_components); 687 } 688 689 bool IPv6AddressToNumber(const char* spec, 690 const Component& host, 691 unsigned char address[16]) { 692 return DoIPv6AddressToNumber<char, unsigned char>(spec, host, address); 693 } 694 695 bool IPv6AddressToNumber(const base::char16* spec, 696 const Component& host, 697 unsigned char address[16]) { 698 return DoIPv6AddressToNumber<base::char16, base::char16>(spec, host, address); 699 } 700 701 } // namespace url 702