mirror of
https://github.com/klzgrad/naiveproxy.git
synced 2024-11-28 00:06:09 +03:00
80 lines
3.0 KiB
C
80 lines
3.0 KiB
C
|
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
|
||
|
|
// Use of this source code is governed by a BSD-style license that can be
|
||
|
|
// found in the LICENSE file.
|
||
|
|
|
||
|
|
#ifndef NET_DNS_DNS_UTIL_H_
|
||
|
|
#define NET_DNS_DNS_UTIL_H_
|
||
|
|
|
||
|
|
#include <string>
|
||
|
|
|
||
|
|
#include "base/strings/string_piece.h"
|
||
|
|
#include "base/time/time.h"
|
||
|
|
#include "net/base/net_export.h"
|
||
|
|
#include "net/base/network_change_notifier.h"
|
||
|
|
|
||
|
|
namespace net {
|
||
|
|
|
||
|
|
class AddressList;
|
||
|
|
|
||
|
|
// DNSDomainFromDot - convert a domain string to DNS format. From DJB's
|
||
|
|
// public domain DNS library.
|
||
|
|
//
|
||
|
|
// dotted: a string in dotted form: "www.google.com"
|
||
|
|
// out: a result in DNS form: "\x03www\x06google\x03com\x00"
|
||
|
|
NET_EXPORT_PRIVATE bool DNSDomainFromDot(const base::StringPiece& dotted,
|
||
|
|
std::string* out);
|
||
|
|
|
||
|
|
// Checks that a hostname is valid. Simple wrapper around DNSDomainFromDot.
|
||
|
|
NET_EXPORT_PRIVATE bool IsValidDNSDomain(const base::StringPiece& dotted);
|
||
|
|
|
||
|
|
// Returns true if the character is valid in a DNS hostname label, whether in
|
||
|
|
// the first position or later in the label.
|
||
|
|
//
|
||
|
|
// This function asserts a looser form of the restrictions in RFC 7719 (section
|
||
|
|
// 2; https://tools.ietf.org/html/rfc7719#section-2): hostnames can include
|
||
|
|
// characters a-z, A-Z, 0-9, -, and _, and any of those characters (except -)
|
||
|
|
// are legal in the first position. The looser rules are necessary to support
|
||
|
|
// service records (initial _), and non-compliant but attested hostnames that
|
||
|
|
// include _. These looser rules also allow Punycode and hence IDN.
|
||
|
|
//
|
||
|
|
// TODO(palmer): In the future, when we can remove support for invalid names,
|
||
|
|
// this can be a private implementation detail of |DNSDomainFromDot|, and need
|
||
|
|
// not be NET_EXPORT_PRIVATE.
|
||
|
|
NET_EXPORT_PRIVATE bool IsValidHostLabelCharacter(char c, bool is_first_char);
|
||
|
|
|
||
|
|
// DNSDomainToString converts a domain in DNS format to a dotted string.
|
||
|
|
// Excludes the dot at the end.
|
||
|
|
NET_EXPORT_PRIVATE std::string DNSDomainToString(
|
||
|
|
const base::StringPiece& domain);
|
||
|
|
|
||
|
|
#if !defined(OS_NACL)
|
||
|
|
NET_EXPORT_PRIVATE
|
||
|
|
base::TimeDelta GetTimeDeltaForConnectionTypeFromFieldTrialOrDefault(
|
||
|
|
const char* field_trial_name,
|
||
|
|
base::TimeDelta default_delta,
|
||
|
|
NetworkChangeNotifier::ConnectionType connection_type);
|
||
|
|
#endif // !defined(OS_NACL)
|
||
|
|
|
||
|
|
// How similar or different two AddressLists are (see values for details).
|
||
|
|
// Used in histograms; do not modify existing values.
|
||
|
|
enum AddressListDeltaType {
|
||
|
|
// Both lists contain the same addresses in the same order.
|
||
|
|
DELTA_IDENTICAL = 0,
|
||
|
|
// Both lists contain the same addresses in a different order.
|
||
|
|
DELTA_REORDERED = 1,
|
||
|
|
// The two lists have at least one address in common, but not all of them.
|
||
|
|
DELTA_OVERLAP = 2,
|
||
|
|
// The two lists have no addresses in common.
|
||
|
|
DELTA_DISJOINT = 3,
|
||
|
|
MAX_DELTA_TYPE
|
||
|
|
};
|
||
|
|
|
||
|
|
// Compares two AddressLists to see how similar or different their addresses
|
||
|
|
// are. (See |AddressListDeltaType| for details of exactly what's checked.)
|
||
|
|
AddressListDeltaType FindAddressListDeltaType(const AddressList& a,
|
||
|
|
const AddressList& b);
|
||
|
|
|
||
|
|
} // namespace net
|
||
|
|
|
||
|
|
#endif // NET_DNS_DNS_UTIL_H_
|