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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set sw=2 ts=8 et tw=80 : */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at */
#ifndef nsDNSService2_h__
#define nsDNSService2_h__
#include "DNSServiceBase.h"
#include "nsClassHashtable.h"
#include "nsPIDNSService.h"
#include "nsIMemoryReporter.h"
#include "nsIObserver.h"
#include "nsHostResolver.h"
#include "nsString.h"
#include "nsTHashSet.h"
#include "nsHashKeys.h"
#include "mozilla/Atomics.h"
#include "mozilla/Mutex.h"
#include "mozilla/Attributes.h"
#include "TRRService.h"
class nsAuthSSPI;
class DNSServiceWrapper final : public nsPIDNSService {
DNSServiceWrapper() = default;
static already_AddRefed<nsIDNSService> GetSingleton();
static void SwitchToBackupDNSService();
~DNSServiceWrapper() = default;
nsIDNSService* DNSService();
nsPIDNSService* PIDNSService();
mozilla::Mutex mLock{"DNSServiceWrapper.mLock"};
nsCOMPtr<nsIDNSService> mDNSServiceInUse;
nsCOMPtr<nsIDNSService> mBackupDNSService;
class nsDNSService final : public mozilla::net::DNSServiceBase,
public nsPIDNSService,
public nsIMemoryReporter {
nsDNSService() = default;
static already_AddRefed<nsIDNSService> GetXPCOMSingleton();
size_t SizeOfIncludingThis(mozilla::MallocSizeOf mallocSizeOf) const;
bool GetOffline() const;
friend class nsAuthSSPI;
friend class DNSServiceWrapper;
nsresult DeprecatedSyncResolve(
const nsACString& aHostname, nsIDNSService::DNSFlags flags,
const mozilla::OriginAttributes& aOriginAttributes,
nsIDNSRecord** result);
~nsDNSService() = default;
void ReadPrefs(const char* name) override;
static already_AddRefed<nsDNSService> GetSingleton();
uint16_t GetAFForLookup(const nsACString& host,
nsIDNSService::DNSFlags flags);
nsresult PreprocessHostname(bool aLocalDomain, const nsACString& aInput,
nsACString& aACE);
bool IsLocalDomain(const nsACString& aHostname) const;
nsresult AsyncResolveInternal(
const nsACString& aHostname, uint16_t type, nsIDNSService::DNSFlags flags,
nsIDNSAdditionalInfo* aInfo, nsIDNSListener* aListener,
nsIEventTarget* target_,
const mozilla::OriginAttributes& aOriginAttributes,
nsICancelable** result);
nsresult CancelAsyncResolveInternal(
const nsACString& aHostname, uint16_t aType,
nsIDNSService::DNSFlags aFlags, nsIDNSAdditionalInfo* aInfo,
nsIDNSListener* aListener, nsresult aReason,
const mozilla::OriginAttributes& aOriginAttributes);
nsresult ResolveInternal(const nsACString& aHostname,
nsIDNSService::DNSFlags flags,
const mozilla::OriginAttributes& aOriginAttributes,
nsIDNSRecord** result);
// Locks the mutex and returns an addreffed resolver. May return null.
already_AddRefed<nsHostResolver> GetResolverLocked();
RefPtr<nsHostResolver> mResolver;
// mLock protects access to mResolver, mLocalDomains, mIPv4OnlyDomains,
// mFailedSVCDomainNames, and mMockHTTPSRRDomain.
mozilla::Mutex mLock MOZ_UNANNOTATED{"nsDNSServer.mLock"};
// mIPv4OnlyDomains is a comma-separated list of domains for which only
// IPv4 DNS lookups are performed. This allows the user to disable IPv6 on
// a per-domain basis and work around broken DNS servers. See bug 68796.
nsCString mIPv4OnlyDomains;
nsCString mForceResolve;
nsCString mMockHTTPSRRDomain;
mozilla::Atomic<bool, mozilla::Relaxed> mHasMockHTTPSRRDomainSet{false};
bool mBlockDotOnion = false;
bool mNotifyResolution = false;
bool mOfflineLocalhost = false;
bool mForceResolveOn = false;
nsTHashSet<nsCString> mLocalDomains;
RefPtr<mozilla::net::TRRService> mTrrService;
uint32_t mResCacheEntries = 0;
uint32_t mResCacheExpiration = 0;
uint32_t mResCacheGrace = 0;
bool mResolverPrefsUpdated = false;
nsClassHashtable<nsCStringHashKey, nsTArray<nsCString>> mFailedSVCDomainNames;
already_AddRefed<nsIDNSService> GetOrInitDNSService();
#endif // nsDNSService2_h__