112 lines
3.7 KiB
C++
112 lines
3.7 KiB
C++
// 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_DNS_CONFIG_H_
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#define NET_DNS_DNS_CONFIG_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/time/time.h"
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#include "base/values.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/dns_hosts.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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namespace net {
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constexpr base::TimeDelta kDnsDefaultFallbackPeriod = base::Seconds(1);
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// DnsConfig stores configuration of the system resolver.
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struct NET_EXPORT DnsConfig {
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DnsConfig();
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DnsConfig(const DnsConfig& other);
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DnsConfig(DnsConfig&& other);
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explicit DnsConfig(std::vector<IPEndPoint> nameservers);
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~DnsConfig();
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DnsConfig& operator=(const DnsConfig& other);
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DnsConfig& operator=(DnsConfig&& other);
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bool Equals(const DnsConfig& d) const;
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bool operator==(const DnsConfig& d) const;
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bool operator!=(const DnsConfig& d) const;
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bool EqualsIgnoreHosts(const DnsConfig& d) const;
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void CopyIgnoreHosts(const DnsConfig& src);
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// Returns a Dict representation of |this|. For performance reasons, the
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// Dict only contains the number of hosts rather than the full list.
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base::Value::Dict ToDict() const;
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bool IsValid() const {
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return !nameservers.empty() || !doh_config.servers().empty();
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}
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// List of name server addresses.
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std::vector<IPEndPoint> nameservers;
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// Status of system DNS-over-TLS (DoT).
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bool dns_over_tls_active = false;
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std::string dns_over_tls_hostname;
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// Suffix search list; used on first lookup when number of dots in given name
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// is less than |ndots|.
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std::vector<std::string> search;
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DnsHosts hosts;
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// True if there are options set in the system configuration that are not yet
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// supported by DnsClient.
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bool unhandled_options = false;
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// AppendToMultiLabelName: is suffix search performed for multi-label names?
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// True, except on Windows where it can be configured.
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bool append_to_multi_label_name = true;
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// Resolver options; see man resolv.conf.
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// Minimum number of dots before global resolution precedes |search|.
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int ndots = 1;
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// Time between retransmissions, see res_state.retrans.
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// Used by Chrome as the initial transaction attempt fallback period (before
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// exponential backoff and dynamic period determination based on previous
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// attempts.)
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base::TimeDelta fallback_period = kDnsDefaultFallbackPeriod;
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// Maximum number of attempts, see res_state.retry.
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int attempts = 2;
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// Maximum number of times a DoH server is attempted per attempted per DNS
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// transaction. This is separate from the global failure limit.
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int doh_attempts = 1;
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// Round robin entries in |nameservers| for subsequent requests.
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bool rotate = false;
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// Indicates system configuration uses local IPv6 connectivity, e.g.,
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// DirectAccess. This is exposed for HostResolver to skip IPv6 probes,
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// as it may cause them to return incorrect results.
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bool use_local_ipv6 = false;
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// DNS over HTTPS server configuration.
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DnsOverHttpsConfig doh_config;
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// The default SecureDnsMode to use when resolving queries. It can be
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// overridden for individual requests (such as requests to resolve a DoH
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// server hostname) using |HostResolver::ResolveHostParameters::
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// secure_dns_mode_override|.
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SecureDnsMode secure_dns_mode = SecureDnsMode::kOff;
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// If set to |true|, we will attempt to upgrade the user's DNS configuration
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// to use DoH server(s) operated by the same provider(s) when the user is
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// in AUTOMATIC mode and has not pre-specified DoH servers.
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bool allow_dns_over_https_upgrade = false;
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};
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} // namespace net
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#endif // NET_DNS_DNS_CONFIG_H_
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