75 lines
2.9 KiB
C++
75 lines
2.9 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_DNS_UTIL_H_
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#define NET_DNS_DNS_UTIL_H_
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#include <cstdint>
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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/address_family.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/base/network_change_notifier.h"
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#include "net/dns/public/dns_over_https_server_config.h"
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#include "net/dns/public/dns_query_type.h"
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#include "net/dns/public/secure_dns_mode.h"
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namespace net {
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// Return the expanded template when no variables have corresponding values.
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NET_EXPORT_PRIVATE std::string GetURLFromTemplateWithoutParameters(
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const std::string& server_template);
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NET_EXPORT_PRIVATE
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base::TimeDelta GetTimeDeltaForConnectionTypeFromFieldTrialOrDefault(
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const char* field_trial_name,
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base::TimeDelta default_delta,
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NetworkChangeNotifier::ConnectionType connection_type);
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// Creates a 2-byte string that represents the name pointer defined in Section
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// 4.1.1 of RFC 1035 for the given offset. The first two bits in the first byte
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// of the name pointer are ones, and the rest 14 bits are given to `offset`,
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// which specifies an offset from the start of the message for the pointed name.
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// Note that `offset` must be less than 2^14 - 1 by definition.
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NET_EXPORT std::string CreateNamePointer(uint16_t offset);
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// Convert a DnsQueryType enum to the wire format integer representation.
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NET_EXPORT_PRIVATE uint16_t DnsQueryTypeToQtype(DnsQueryType dns_query_type);
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NET_EXPORT DnsQueryType
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AddressFamilyToDnsQueryType(AddressFamily address_family);
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// Uses the hardcoded upgrade mapping to discover DoH service(s) associated with
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// a DoT hostname. Providers with a disabled `base::Feature` are not eligible
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// for upgrade.
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NET_EXPORT_PRIVATE std::vector<DnsOverHttpsServerConfig>
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GetDohUpgradeServersFromDotHostname(const std::string& dot_server);
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// Uses the hardcoded upgrade mapping to discover DoH service(s) associated with
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// a list of insecure DNS servers. Server ordering is preserved across the
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// mapping. Providers with a disabled `base::Feature` are not eligible for
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// upgrade.
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NET_EXPORT_PRIVATE std::vector<DnsOverHttpsServerConfig>
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GetDohUpgradeServersFromNameservers(const std::vector<IPEndPoint>& dns_servers);
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// Returns the provider id to use in UMA histogram names. If there is no
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// provider id that matches `doh_server`, returns "Other".
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NET_EXPORT_PRIVATE std::string GetDohProviderIdForHistogramFromServerConfig(
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const DnsOverHttpsServerConfig& doh_server);
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// Returns the provider id to use in UMA histogram names. If there is no
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// provider id that matches `nameserver`, returns "Other".
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NET_EXPORT_PRIVATE std::string GetDohProviderIdForHistogramFromNameserver(
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const IPEndPoint& nameserver);
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NET_EXPORT_PRIVATE std::string SecureDnsModeToString(
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const SecureDnsMode secure_dns_mode);
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} // namespace net
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#endif // NET_DNS_DNS_UTIL_H_
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