1 files changed, 152 insertions, 0 deletions
diff --git a/netwerk/dns/DNSRequestBase.h b/netwerk/dns/DNSRequestBase.h
new file mode 100644
index 0000000000..7b26846f5e
--- /dev/null
+++ b/netwerk/dns/DNSRequestBase.h
@@ -0,0 +1,152 @@
+/* -*- 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_DNSRequestBase_h
+#define mozilla_net_DNSRequestBase_h
+
+#include "mozilla/net/PDNSRequestParent.h"
+#include "nsICancelable.h"
+#include "nsIDNSRecord.h"
+#include "nsIDNSListener.h"
+#include "nsIDNSByTypeRecord.h"
+#include "nsIEventTarget.h"
+
+namespace mozilla {
+namespace net {
+
+class DNSRequestActor;
+class DNSRequestChild;
+class DNSRequestHandler;
+class DNSRequestParent;
+class DNSRequestSender;
+
+// A base class for DNSRequestSender and DNSRequestHandler.
+// Provide interfaces for processing DNS requests.
+class DNSRequestBase : public nsISupports {
+ public:
+  explicit DNSRequestBase() = default;
+
+  void SetIPCActor(DNSRequestActor* aActor);
+
+  virtual void OnRecvCancelDNSRequest(const nsCString& hostName,
+                                      const nsCString& trrServer,
+                                      const int32_t& port, const uint16_t& type,
+                                      const OriginAttributes& originAttributes,
+                                      const nsIDNSService::DNSFlags& flags,
+                                      const nsresult& reason) = 0;
+  virtual bool OnRecvLookupCompleted(const DNSRequestResponse& reply) = 0;
+  virtual void OnIPCActorDestroy() = 0;
+
+  virtual DNSRequestSender* AsDNSRequestSender() = 0;
+  virtual DNSRequestHandler* AsDNSRequestHandler() = 0;
+
+ protected:
+  virtual ~DNSRequestBase() = default;
+
+  RefPtr<DNSRequestActor> mIPCActor;
+};
+
+// DNSRequestSender is used to send an IPC request to DNSRequestHandler and
+// deliver the result to nsIDNSListener.
+// Note this class could be used both in content process and parent process.
+class DNSRequestSender final : public DNSRequestBase, public nsICancelable {
+ public:
+  NS_DECL_THREADSAFE_ISUPPORTS
+  NS_DECL_NSICANCELABLE
+
+  DNSRequestSender(const nsACString& aHost, const nsACString& aTrrServer,
+                   int32_t aPort, const uint16_t& aType,
+                   const OriginAttributes& aOriginAttributes,
+                   const nsIDNSService::DNSFlags& aFlags,
+                   nsIDNSListener* aListener, nsIEventTarget* target);
+
+  void OnRecvCancelDNSRequest(const nsCString& hostName,
+                              const nsCString& trrServer, const int32_t& port,
+                              const uint16_t& type,
+                              const OriginAttributes& originAttributes,
+                              const nsIDNSService::DNSFlags& flags,
+                              const nsresult& reason) override;
+  bool OnRecvLookupCompleted(const DNSRequestResponse& reply) override;
+  void OnIPCActorDestroy() override;
+
+  // Sends IPDL request to DNSRequestHandler
+  void StartRequest();
+  void CallOnLookupComplete();
+
+  DNSRequestSender* AsDNSRequestSender() override { return this; }
+  DNSRequestHandler* AsDNSRequestHandler() override { return nullptr; }
+
+ private:
+  friend class ChildDNSService;
+  virtual ~DNSRequestSender() = default;
+
+  nsCOMPtr<nsIDNSListener> mListener;
+  nsCOMPtr<nsIEventTarget> mTarget;
+  nsCOMPtr<nsIDNSRecord> mResultRecord;
+  nsresult mResultStatus = NS_OK;
+  nsCString mHost;
+  nsCString mTrrServer;
+  int32_t mPort;
+  uint16_t mType = 0;
+  const OriginAttributes mOriginAttributes;
+  nsIDNSService::DNSFlags mFlags = nsIDNSService::RESOLVE_DEFAULT_FLAGS;
+};
+
+// DNSRequestHandler handles the dns request and sends the result back via IPC.
+// Note this class could be used both in parent process and socket process.
+class DNSRequestHandler final : public DNSRequestBase, public nsIDNSListener {
+ public:
+  NS_DECL_THREADSAFE_ISUPPORTS
+  NS_DECL_NSIDNSLISTENER
+
+  DNSRequestHandler() = default;
+
+  void DoAsyncResolve(const nsACString& hostname, const nsACString& trrServer,
+                      int32_t port, uint16_t type,
+                      const OriginAttributes& originAttributes,
+                      nsIDNSService::DNSFlags flags);
+
+  void OnRecvCancelDNSRequest(const nsCString& hostName,
+                              const nsCString& trrServer, const int32_t& port,
+                              const uint16_t& type,
+                              const OriginAttributes& originAttributes,
+                              const nsIDNSService::DNSFlags& flags,
+                              const nsresult& reason) override;
+  bool OnRecvLookupCompleted(const DNSRequestResponse& reply) override;
+  void OnIPCActorDestroy() override;
+
+  DNSRequestSender* AsDNSRequestSender() override { return nullptr; }
+  DNSRequestHandler* AsDNSRequestHandler() override { return this; }
+
+ private:
+  virtual ~DNSRequestHandler() = default;
+
+  nsIDNSService::DNSFlags mFlags = nsIDNSService::RESOLVE_DEFAULT_FLAGS;
+};
+
+// Provides some common methods for DNSRequestChild and DNSRequestParent.
+class DNSRequestActor {
+ public:
+  NS_INLINE_DECL_PURE_VIRTUAL_REFCOUNTING
+
+  explicit DNSRequestActor(DNSRequestBase* aRequest) : mDNSRequest(aRequest) {}
+
+  virtual bool CanSend() const = 0;
+  virtual DNSRequestChild* AsDNSRequestChild() = 0;
+  virtual DNSRequestParent* AsDNSRequestParent() = 0;
+
+  DNSRequestBase* GetDNSRequest() { return mDNSRequest.get(); };
+
+ protected:
+  virtual ~DNSRequestActor() = default;
+
+  RefPtr<DNSRequestBase> mDNSRequest;
+};
+
+}  // namespace net
+}  // namespace mozilla
+
+#endif  // mozilla_net_DNSRequestBase_h