1 files changed, 186 insertions, 0 deletions
diff --git a/netwerk/ipc/SocketProcessBridgeChild.cpp b/netwerk/ipc/SocketProcessBridgeChild.cpp
new file mode 100644
index 0000000000..798ce37bf1
--- /dev/null
+++ b/netwerk/ipc/SocketProcessBridgeChild.cpp
@@ -0,0 +1,186 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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/. */
+
+#include "SocketProcessBridgeChild.h"
+#include "SocketProcessLogging.h"
+
+#include "mozilla/AppShutdown.h"
+#include "mozilla/dom/ContentChild.h"
+#include "mozilla/ipc/BackgroundChild.h"
+#include "mozilla/ipc/Endpoint.h"
+#include "mozilla/net/NeckoChild.h"
+#include "nsIObserverService.h"
+#include "nsThreadUtils.h"
+#include "mozilla/Preferences.h"
+#include "mozilla/StaticPrefs_network.h"
+
+namespace mozilla {
+
+using dom::ContentChild;
+
+namespace net {
+
+StaticRefPtr<SocketProcessBridgeChild>
+    SocketProcessBridgeChild::sSocketProcessBridgeChild;
+
+NS_IMPL_ISUPPORTS(SocketProcessBridgeChild, nsIObserver)
+
+// static
+bool SocketProcessBridgeChild::Create(
+    Endpoint<PSocketProcessBridgeChild>&& aEndpoint) {
+  MOZ_ASSERT(NS_IsMainThread());
+
+  sSocketProcessBridgeChild = new SocketProcessBridgeChild();
+
+  if (!aEndpoint.Bind(sSocketProcessBridgeChild)) {
+    MOZ_ASSERT(false, "Bind failed!");
+    sSocketProcessBridgeChild = nullptr;
+    return false;
+  }
+
+  nsCOMPtr<nsIObserverService> os = mozilla::services::GetObserverService();
+  if (os) {
+    os->AddObserver(sSocketProcessBridgeChild, "content-child-shutdown", false);
+  }
+
+  sSocketProcessBridgeChild->mSocketProcessPid = aEndpoint.OtherPid();
+  return true;
+}
+
+// static
+already_AddRefed<SocketProcessBridgeChild>
+SocketProcessBridgeChild::GetSingleton() {
+  RefPtr<SocketProcessBridgeChild> child = sSocketProcessBridgeChild;
+  return child.forget();
+}
+
+// static
+RefPtr<SocketProcessBridgeChild::GetPromise>
+SocketProcessBridgeChild::GetSocketProcessBridge() {
+  MOZ_ASSERT(NS_IsMainThread());
+
+  if (!StaticPrefs::network_process_enabled()) {
+    return GetPromise::CreateAndReject(nsCString("Socket process disabled!"),
+                                       __func__);
+  }
+
+  if (!gNeckoChild) {
+    return GetPromise::CreateAndReject(nsCString("No NeckoChild!"), __func__);
+  }
+
+  // ContentChild is shutting down, we should not try to create
+  // SocketProcessBridgeChild.
+  ContentChild* content = ContentChild::GetSingleton();
+  if (!content || content->IsShuttingDown()) {
+    return GetPromise::CreateAndReject(
+        nsCString("ContentChild is shutting down."), __func__);
+  }
+
+  if (sSocketProcessBridgeChild) {
+    return GetPromise::CreateAndResolve(sSocketProcessBridgeChild, __func__);
+  }
+
+  return gNeckoChild->SendInitSocketProcessBridge()->Then(
+      GetMainThreadSerialEventTarget(), __func__,
+      [](NeckoChild::InitSocketProcessBridgePromise::ResolveOrRejectValue&&
+             aResult) {
+        ContentChild* content = ContentChild::GetSingleton();
+        if (!content || content->IsShuttingDown()) {
+          return GetPromise::CreateAndReject(
+              nsCString("ContentChild is shutting down."), __func__);
+        }
+        if (!sSocketProcessBridgeChild) {
+          if (aResult.IsReject()) {
+            return GetPromise::CreateAndReject(
+                nsCString("SendInitSocketProcessBridge failed"), __func__);
+          }
+
+          if (!aResult.ResolveValue().IsValid()) {
+            return GetPromise::CreateAndReject(
+                nsCString(
+                    "SendInitSocketProcessBridge resolved with an invalid "
+                    "endpoint!"),
+                __func__);
+          }
+
+          if (!SocketProcessBridgeChild::Create(
+                  std::move(aResult.ResolveValue()))) {
+            return GetPromise::CreateAndReject(
+                nsCString("SendInitSocketProcessBridge resolved with a valid "
+                          "endpoint, "
+                          "but SocketProcessBridgeChild::Create failed!"),
+                __func__);
+          }
+        }
+
+        return GetPromise::CreateAndResolve(sSocketProcessBridgeChild,
+                                            __func__);
+      });
+}
+
+SocketProcessBridgeChild::SocketProcessBridgeChild() : mShuttingDown(false) {
+  LOG(("CONSTRUCT SocketProcessBridgeChild::SocketProcessBridgeChild\n"));
+}
+
+SocketProcessBridgeChild::~SocketProcessBridgeChild() {
+  LOG(("DESTRUCT SocketProcessBridgeChild::SocketProcessBridgeChild\n"));
+}
+
+mozilla::ipc::IPCResult SocketProcessBridgeChild::RecvTest() {
+  LOG(("SocketProcessBridgeChild::RecvTest\n"));
+  return IPC_OK();
+}
+
+void SocketProcessBridgeChild::ActorDestroy(ActorDestroyReason aWhy) {
+  LOG(("SocketProcessBridgeChild::ActorDestroy\n"));
+  if (AbnormalShutdown == aWhy) {
+    if (gNeckoChild &&
+        !AppShutdown::IsInOrBeyond(ShutdownPhase::AppShutdownConfirmed)) {
+      // Let NeckoParent know that the socket process connections must be
+      // rebuilt.
+      gNeckoChild->SendResetSocketProcessBridge();
+    }
+
+    nsresult res;
+    nsCOMPtr<nsISerialEventTarget> mSTSThread =
+        do_GetService(NS_SOCKETTRANSPORTSERVICE_CONTRACTID, &res);
+    if (NS_SUCCEEDED(res) && mSTSThread) {
+      // This must be called off the main thread.  If we don't make this call
+      // ipc::BackgroundChild::GetOrCreateSocketActorForCurrentThread() will
+      // return the previous actor that is no longer able to send. This causes
+      // rebuilding the socket process connections to fail.
+      MOZ_ALWAYS_SUCCEEDS(mSTSThread->Dispatch(NS_NewRunnableFunction(
+          "net::SocketProcessBridgeChild::ActorDestroy",
+          []() { ipc::BackgroundChild::CloseForCurrentThread(); })));
+    }
+  }
+
+  nsCOMPtr<nsIObserverService> os = mozilla::services::GetObserverService();
+  if (os) {
+    os->RemoveObserver(this, "content-child-shutdown");
+  }
+  GetCurrentSerialEventTarget()->Dispatch(
+      NewRunnableMethod("net::SocketProcessBridgeChild::DeferredDestroy", this,
+                        &SocketProcessBridgeChild::DeferredDestroy));
+  mShuttingDown = true;
+}
+
+NS_IMETHODIMP
+SocketProcessBridgeChild::Observe(nsISupports* aSubject, const char* aTopic,
+                                  const char16_t* aData) {
+  if (!strcmp(aTopic, "content-child-shutdown")) {
+    PSocketProcessBridgeChild::Close();
+  }
+  return NS_OK;
+}
+
+void SocketProcessBridgeChild::DeferredDestroy() {
+  MOZ_ASSERT(NS_IsMainThread());
+
+  sSocketProcessBridgeChild = nullptr;
+}
+
+}  // namespace net
+}  // namespace mozilla