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.
5
#ifndef URL_URL_CANON_IP_H_
6
#define URL_URL_CANON_IP_H_
8
#include "base/strings/string16.h"
9
#include "url/url_canon.h"
10
#include "url/url_export.h"
11
#include "url/url_parse.h"
15
// Writes the given IPv4 address to |output|.
16
URL_EXPORT void AppendIPv4Address(const unsigned char address[4],
19
// Writes the given IPv6 address to |output|.
20
URL_EXPORT void AppendIPv6Address(const unsigned char address[16],
23
// Searches the host name for the portions of the IPv4 address. On success,
24
// each component will be placed into |components| and it will return true.
25
// It will return false if the host can not be separated as an IPv4 address
26
// or if there are any non-7-bit characters or other characters that can not
27
// be in an IP address. (This is important so we fail as early as possible for
28
// common non-IP hostnames.)
30
// Not all components may exist. If there are only 3 components, for example,
31
// the last one will have a length of -1 or 0 to indicate it does not exist.
33
// Note that many platform's inet_addr will ignore everything after a space
34
// in certain curcumstances if the stuff before the space looks like an IP
35
// address. IE6 is included in this. We do NOT handle this case. In many cases,
36
// the browser's canonicalization will get run before this which converts
37
// spaces to %20 (in the case of IE7) or rejects them (in the case of
38
// Mozilla), so this code path never gets hit. Our host canonicalization will
39
// notice these spaces and escape them, which will make IP address finding
40
// fail. This seems like better behavior than stripping after a space.
41
URL_EXPORT bool FindIPv4Components(const char* spec,
42
const url_parse::Component& host,
43
url_parse::Component components[4]);
44
URL_EXPORT bool FindIPv4Components(const base::char16* spec,
45
const url_parse::Component& host,
46
url_parse::Component components[4]);
48
// Converts an IPv4 address to a 32-bit number (network byte order).
50
// Possible return values:
51
// IPV4 - IPv4 address was successfully parsed.
52
// BROKEN - Input was formatted like an IPv4 address, but overflow occurred
54
// NEUTRAL - Input couldn't possibly be interpreted as an IPv4 address.
55
// It might be an IPv6 address, or a hostname.
57
// On success, |num_ipv4_components| will be populated with the number of
58
// components in the IPv4 address.
59
URL_EXPORT CanonHostInfo::Family IPv4AddressToNumber(
61
const url_parse::Component& host,
62
unsigned char address[4],
63
int* num_ipv4_components);
64
URL_EXPORT CanonHostInfo::Family IPv4AddressToNumber(
65
const base::char16* spec,
66
const url_parse::Component& host,
67
unsigned char address[4],
68
int* num_ipv4_components);
70
// Converts an IPv6 address to a 128-bit number (network byte order), returning
71
// true on success. False means that the input was not a valid IPv6 address.
73
// NOTE that |host| is expected to be surrounded by square brackets.
74
// i.e. "[::1]" rather than "::1".
75
URL_EXPORT bool IPv6AddressToNumber(const char* spec,
76
const url_parse::Component& host,
77
unsigned char address[16]);
78
URL_EXPORT bool IPv6AddressToNumber(const base::char16* spec,
79
const url_parse::Component& host,
80
unsigned char address[16]);
82
} // namespace url_canon
84
#endif // URL_URL_CANON_IP_H_