75 lines
2.7 KiB
C
75 lines
2.7 KiB
C
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// Copyright 2018 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_DNS_CONFIG_OVERRIDES_H_
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#define NET_DNS_PUBLIC_DNS_CONFIG_OVERRIDES_H_
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#include <string>
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#include <vector>
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#include "base/time/time.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 "net/dns/public/dns_over_https_config.h"
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#include "net/dns/public/secure_dns_mode.h"
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#include "third_party/abseil-cpp/absl/types/optional.h"
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namespace net {
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struct DnsConfig;
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// Overriding values to be applied over a DnsConfig struct.
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struct NET_EXPORT DnsConfigOverrides {
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DnsConfigOverrides();
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DnsConfigOverrides(const DnsConfigOverrides& other);
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DnsConfigOverrides(DnsConfigOverrides&& other);
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~DnsConfigOverrides();
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DnsConfigOverrides& operator=(const DnsConfigOverrides& other);
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DnsConfigOverrides& operator=(DnsConfigOverrides&& other);
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bool operator==(const DnsConfigOverrides& other) const;
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bool operator!=(const DnsConfigOverrides& other) const;
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// Creation method that initializes all values with the defaults from
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// DnsConfig. Guarantees the result of OverridesEverything() will be |true|.
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static DnsConfigOverrides CreateOverridingEverythingWithDefaults();
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// Creates a new DnsConfig where any field with an overriding value in |this|
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// is replaced with that overriding value. Any field without an overriding
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// value (|absl::nullopt|) will be copied as-is from |config|.
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DnsConfig ApplyOverrides(const DnsConfig& config) const;
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// Returns |true| if the overriding configuration is comprehensive and would
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// override everything in a base DnsConfig. This is the case if all Optional
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// fields have a value.
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bool OverridesEverything() const;
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// Overriding values. See same-named fields in DnsConfig for explanations.
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absl::optional<std::vector<IPEndPoint>> nameservers;
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absl::optional<bool> dns_over_tls_active;
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absl::optional<std::string> dns_over_tls_hostname;
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absl::optional<std::vector<std::string>> search;
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absl::optional<bool> append_to_multi_label_name;
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absl::optional<int> ndots;
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absl::optional<base::TimeDelta> fallback_period;
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absl::optional<int> attempts;
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absl::optional<int> doh_attempts;
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absl::optional<bool> rotate;
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absl::optional<bool> use_local_ipv6;
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absl::optional<DnsOverHttpsConfig> dns_over_https_config;
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absl::optional<SecureDnsMode> secure_dns_mode;
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absl::optional<bool> allow_dns_over_https_upgrade;
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// |hosts| is not supported for overriding except to clear it.
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bool clear_hosts = false;
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// Note no overriding value for |unhandled_options|. It is meta-configuration,
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// and there should be no reason to override it.
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};
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} // namespace net
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#endif // NET_DNS_PUBLIC_DNS_CONFIG_OVERRIDES_H_
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