101 lines
3.6 KiB
C++
101 lines
3.6 KiB
C++
// Copyright 2012 The Chromium Authors
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef NET_DNS_PUBLIC_WIN_DNS_SYSTEM_SETTINGS_H_
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#define NET_DNS_PUBLIC_WIN_DNS_SYSTEM_SETTINGS_H_
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#include <winsock2.h>
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#include <iphlpapi.h>
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#include <iptypes.h>
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#include <memory>
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#include <string>
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#include <vector>
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#include "base/memory/free_deleter.h"
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#include "base/strings/string_piece_forward.h"
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#include "net/base/ip_endpoint.h"
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#include "net/base/net_export.h"
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#include "third_party/abseil-cpp/absl/types/optional.h"
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namespace net {
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// This is an aggregate representation of Windows system DNS configuration and
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// can be easily built manually in tests.
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struct NET_EXPORT WinDnsSystemSettings {
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struct NET_EXPORT DevolutionSetting {
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DevolutionSetting();
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DevolutionSetting(absl::optional<DWORD> enabled,
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absl::optional<DWORD> level);
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DevolutionSetting(const DevolutionSetting&);
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DevolutionSetting& operator=(const DevolutionSetting&);
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~DevolutionSetting();
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// UseDomainNameDevolution
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absl::optional<DWORD> enabled;
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// DomainNameDevolutionLevel
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absl::optional<DWORD> level;
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};
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// Returns true iff |address| is DNS address from IPv6 stateless discovery,
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// i.e., matches fec0:0:0:ffff::{1,2,3}.
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// http://tools.ietf.org/html/draft-ietf-ipngwg-dns-discovery
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static bool IsStatelessDiscoveryAddress(const IPAddress& address);
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WinDnsSystemSettings();
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~WinDnsSystemSettings();
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WinDnsSystemSettings(WinDnsSystemSettings&&);
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WinDnsSystemSettings& operator=(WinDnsSystemSettings&&);
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// List of nameserver IP addresses.
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std::unique_ptr<IP_ADAPTER_ADDRESSES, base::FreeDeleter> addresses;
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// SOFTWARE\Policies\Microsoft\Windows NT\DNSClient\SearchList
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absl::optional<std::wstring> policy_search_list;
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// SYSTEM\CurrentControlSet\Tcpip\Parameters\SearchList
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absl::optional<std::wstring> tcpip_search_list;
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// SYSTEM\CurrentControlSet\Tcpip\Parameters\Domain
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absl::optional<std::wstring> tcpip_domain;
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// SOFTWARE\Policies\Microsoft\System\DNSClient\PrimaryDnsSuffix
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absl::optional<std::wstring> primary_dns_suffix;
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// SOFTWARE\Policies\Microsoft\Windows NT\DNSClient
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DevolutionSetting policy_devolution;
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// SYSTEM\CurrentControlSet\Dnscache\Parameters
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DevolutionSetting dnscache_devolution;
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// SYSTEM\CurrentControlSet\Tcpip\Parameters
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DevolutionSetting tcpip_devolution;
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// SOFTWARE\Policies\Microsoft\Windows NT\DNSClient\AppendToMultiLabelName
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absl::optional<DWORD> append_to_multi_label_name;
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// True when the Name Resolution Policy Table (NRPT) has at least one rule:
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// SOFTWARE\Policies\Microsoft\Windows NT\DNSClient\DnsPolicyConfig\Rule*
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// (or)
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// SYSTEM\CurrentControlSet\Services\Dnscache\Parameters\DnsPolicyConfig\Rule*
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bool have_name_resolution_policy = false;
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// True when a proxy is configured via at least one rule:
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// SYSTEM\CurrentControlSet\Services\Dnscache\Parameters\DnsConnections
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// (or)
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// SYSTEM\CurrentControlSet\Services\Dnscache\Parameters\DnsActiveIfs
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// (or)
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// SYSTEM\CurrentControlSet\Services\Dnscache\Parameters\DnsConnectionsProxies
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bool have_proxy = false;
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// Gets Windows configured DNS servers from all network adapters, with the
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// exception of stateless discovery addresses (see IsStatelessDiscoveryAddress
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// above).
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absl::optional<std::vector<IPEndPoint>> GetAllNameservers();
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};
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// Reads WinDnsSystemSettings from IpHelper and the registry, or nullopt on
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// errors reading them.
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NET_EXPORT absl::optional<WinDnsSystemSettings> ReadWinSystemDnsSettings();
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} // namespace net
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#endif // NET_DNS_PUBLIC_WIN_DNS_SYSTEM_SETTINGS_H_
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