src/url_canon_ip.h

   1 // Copyright 2008, Google Inc.
   2 // All rights reserved.
   3 //
   4 // Redistribution and use in source and binary forms, with or without
   5 // modification, are permitted provided that the following conditions are
   6 // met:
   7 //
   8 //     * Redistributions of source code must retain the above copyright
   9 // notice, this list of conditions and the following disclaimer.
  10 //     * Redistributions in binary form must reproduce the above
  11 // copyright notice, this list of conditions and the following disclaimer
  12 // in the documentation and/or other materials provided with the
  13 // distribution.
  14 //     * Neither the name of Google Inc. nor the names of its
  15 // contributors may be used to endorse or promote products derived from
  16 // this software without specific prior written permission.
  17 //
  18 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  20 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  21 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  22 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  23 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  24 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  25 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  26 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  28 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29
  30 #ifndef GOOGLEURL_SRC_URL_CANON_IP_H__
  31 #define GOOGLEURL_SRC_URL_CANON_IP_H__
  32
  33 #include "base/string16.h"
  34 #include "googleurl/src/url_canon.h"
  35 #include "googleurl/src/url_parse.h"
  36
  37 namespace url_canon {
  38
  39 // Searches the host name for the portions of the IPv4 address. On success,
  40 // each component will be placed into |components| and it will return true.
  41 // It will return false if the host can not be separated as an IPv4 address
  42 // or if there are any non-7-bit characters or other characters that can not
  43 // be in an IP address. (This is important so we fail as early as possible for
  44 // common non-IP hostnames.)
  45 //
  46 // Not all components may exist. If there are only 3 components, for example,
  47 // the last one will have a length of -1 or 0 to indicate it does not exist.
  48 //
  49 // Note that many platform's inet_addr will ignore everything after a space
  50 // in certain curcumstances if the stuff before the space looks like an IP
  51 // address. IE6 is included in this. We do NOT handle this case. In many cases,
  52 // the browser's canonicalization will get run before this which converts
  53 // spaces to %20 (in the case of IE7) or rejects them (in the case of
  54 // Mozilla), so this code path never gets hit. Our host canonicalization will
  55 // notice these spaces and escape them, which will make IP address finding
  56 // fail. This seems like better behavior than stripping after a space.
  57 bool FindIPv4Components(const char* spec,
  58                         const url_parse::Component& host,
  59                         url_parse::Component components[4]);
  60 bool FindIPv4Components(const char16* spec,
  61                         const url_parse::Component& host,
  62                         url_parse::Component components[4]);
  63
  64 // Converts an IPv4 address to a 32-bit number (network byte order).
  65 //
  66 // Possible return values:
  67 //   IPV4    - IPv4 address was successfully parsed.
  68 //   BROKEN  - Input was formatted like an IPv4 address, but overflow occurred
  69 //             during parsing.
  70 //   NEUTRAL - Input couldn't possibly be interpreted as an IPv4 address.
  71 //             It might be an IPv6 address, or a hostname.
  72 //
  73 // On success, |num_ipv4_components| will be populated with the number of
  74 // components in the IPv4 address.
  75 CanonHostInfo::Family IPv4AddressToNumber(const char* spec,
  76                                           const url_parse::Component& host,
  77                                           unsigned char address[4],
  78                                           int* num_ipv4_components);
  79 CanonHostInfo::Family IPv4AddressToNumber(const char16* spec,
  80                                           const url_parse::Component& host,
  81                                           unsigned char address[4],
  82                                           int* num_ipv4_components);
  83
  84 // Converts an IPv6 address to a 128-bit number (network byte order), returning
  85 // true on success. False means that the input was not a valid IPv6 address.
  86 //
  87 // NOTE that |host| is expected to be surrounded by square brackets.
  88 // i.e. "[::1]" rather than "::1".
  89 bool IPv6AddressToNumber(const char* spec,
  90                          const url_parse::Component& host,
  91                          unsigned char address[16]);
  92 bool IPv6AddressToNumber(const char16* spec,
  93                          const url_parse::Component& host,
  94                          unsigned char address[16]);
  95
  96 }  // namespace url_canon
  97
  98 #endif  // GOOGLEURL_SRC_URL_CANON_IP_H__