ChildDNSService.h - mozsearch

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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 http://mozilla.org/MPL/2.0/. */

#ifndef mozilla_net_ChildDNSService_h

#define mozilla_net_ChildDNSService_h

#include "DNSServiceBase.h"

#include "nsPIDNSService.h"

#include "mozilla/Attributes.h"

#include "mozilla/Mutex.h"

#include "DNSRequestChild.h"

#include "DNSRequestParent.h"

#include "nsHashKeys.h"

#include "nsClassHashtable.h"

namespace mozilla {

namespace net {

class TRRServiceParent;

class ChildDNSService final : public DNSServiceBase, public nsPIDNSService {

 public:

  // AsyncResolve (and CancelAsyncResolve) can be called off-main

  NS_DECL_ISUPPORTS_INHERITED

  NS_DECL_NSPIDNSSERVICE

  NS_DECL_NSIDNSSERVICE

  NS_DECL_NSIOBSERVER

  ChildDNSService();

  static already_AddRefed<ChildDNSService> GetSingleton();

  void NotifyRequestDone(DNSRequestSender* aDnsRequest);

  void SetTRRDomain(const nsACString& aTRRDomain);

  void SetTRRModeInChild(nsIDNSService::ResolverMode mode,

                         nsIDNSService::ResolverMode modeFromPref);

 private:

  virtual ~ChildDNSService() = default;

  void MOZ_ALWAYS_INLINE GetDNSRecordHashKey(

      const nsACString& aHost, const nsACString& aTrrServer, int32_t aPort,

      uint16_t aType, const OriginAttributes& aOriginAttributes,

      nsIDNSService::DNSFlags aFlags, uintptr_t aListenerAddr,

      nsACString& aHashKey);

  nsresult AsyncResolveInternal(const nsACString& hostname, uint16_t type,

                                nsIDNSService::DNSFlags flags,

                                nsIDNSAdditionalInfo* aInfo,

                                nsIDNSListener* listener,

                                nsIEventTarget* target_,

                                const OriginAttributes& aOriginAttributes,

                                nsICancelable** result);

  nsresult CancelAsyncResolveInternal(

      const nsACString& aHostname, uint16_t aType,

      nsIDNSService::DNSFlags aFlags, nsIDNSAdditionalInfo* aInfo,

      nsIDNSListener* aListener, nsresult aReason,

      const OriginAttributes& aOriginAttributes);

  // We need to remember pending dns requests to be able to cancel them.

  nsClassHashtable<nsCStringHashKey, nsTArray<RefPtr<DNSRequestSender>>>

      mPendingRequests;

  Mutex mPendingRequestsLock MOZ_UNANNOTATED{"DNSPendingRequestsLock"};

  RefPtr<TRRServiceParent> mTRRServiceParent;

  nsCString mTRRDomain;

  // Only set in the content process.

  nsIDNSService::ResolverMode mTRRMode =

      nsIDNSService::ResolverMode::MODE_NATIVEONLY;

};

}  // namespace net

}  // namespace mozilla

#endif  // mozilla_net_ChildDNSService_h