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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 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/. */
#include <limits>
#include "mozilla/Hal.h"
#include "ConnectionWorker.h"
#include "mozilla/dom/WorkerPrivate.h"
#include "mozilla/dom/WorkerRef.h"
#include "mozilla/dom/WorkerRunnable.h"
#include "mozilla/dom/WorkerScope.h"
namespace mozilla::dom::network {
class ConnectionProxy final : public hal::NetworkObserver {
public:
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(ConnectionProxy)
static already_AddRefed<ConnectionProxy> Create(
WorkerPrivate* aWorkerPrivate, ConnectionWorker* aConnection) {
RefPtr<ConnectionProxy> proxy = new ConnectionProxy(aConnection);
RefPtr<StrongWorkerRef> workerRef = StrongWorkerRef::Create(
aWorkerPrivate, "ConnectionProxy", [proxy]() { proxy->Shutdown(); });
if (NS_WARN_IF(!workerRef)) {
return nullptr;
}
proxy->mWorkerRef = new ThreadSafeWorkerRef(workerRef);
return proxy.forget();
}
ThreadSafeWorkerRef* WorkerRef() const { return mWorkerRef; }
// For IObserver - main-thread only.
void Notify(const hal::NetworkInformation& aNetworkInfo) override;
void Shutdown();
void Update(ConnectionType aType, bool aIsWifi, uint32_t aDHCPGateway) {
MOZ_ASSERT(mConnection);
MOZ_ASSERT(IsCurrentThreadRunningWorker());
mConnection->Update(aType, aIsWifi, aDHCPGateway, true);
}
private:
explicit ConnectionProxy(ConnectionWorker* aConnection)
: mConnection(aConnection) {}
~ConnectionProxy() = default;
// Raw pointer because the ConnectionWorker keeps alive the proxy.
// This is touched only on the worker-thread and it's nullified when the
// shutdown procedure starts.
ConnectionWorker* mConnection;
RefPtr<ThreadSafeWorkerRef> mWorkerRef;
};
namespace {
// This class initializes the hal observer on the main-thread.
class InitializeRunnable : public WorkerMainThreadRunnable {
private:
// raw pointer because this is a sync runnable.
ConnectionProxy* mProxy;
hal::NetworkInformation& mNetworkInfo;
public:
InitializeRunnable(WorkerPrivate* aWorkerPrivate, ConnectionProxy* aProxy,
hal::NetworkInformation& aNetworkInfo)
: WorkerMainThreadRunnable(aWorkerPrivate,
"ConnectionWorker :: Initialize"_ns),
mProxy(aProxy),
mNetworkInfo(aNetworkInfo) {
MOZ_ASSERT(aProxy);
aWorkerPrivate->AssertIsOnWorkerThread();
}
bool MainThreadRun() override {
MOZ_ASSERT(NS_IsMainThread());
hal::RegisterNetworkObserver(mProxy);
hal::GetCurrentNetworkInformation(&mNetworkInfo);
return true;
}
};
// This class turns down the hal observer on the main-thread.
class ShutdownRunnable : public WorkerMainThreadRunnable {
private:
// raw pointer because this is a sync runnable.
ConnectionProxy* mProxy;
public:
ShutdownRunnable(WorkerPrivate* aWorkerPrivate, ConnectionProxy* aProxy)
: WorkerMainThreadRunnable(aWorkerPrivate,
"ConnectionWorker :: Shutdown"_ns),
mProxy(aProxy) {
MOZ_ASSERT(aProxy);
aWorkerPrivate->AssertIsOnWorkerThread();
}
bool MainThreadRun() override {
MOZ_ASSERT(NS_IsMainThread());
hal::UnregisterNetworkObserver(mProxy);
return true;
}
};
class NotifyRunnable : public WorkerRunnable {
private:
RefPtr<ConnectionProxy> mProxy;
const ConnectionType mConnectionType;
const bool mIsWifi;
const uint32_t mDHCPGateway;
public:
NotifyRunnable(WorkerPrivate* aWorkerPrivate, ConnectionProxy* aProxy,
ConnectionType aType, bool aIsWifi, uint32_t aDHCPGateway)
: WorkerRunnable(aWorkerPrivate),
mProxy(aProxy),
mConnectionType(aType),
mIsWifi(aIsWifi),
mDHCPGateway(aDHCPGateway) {
MOZ_ASSERT(aProxy);
MOZ_ASSERT(NS_IsMainThread());
}
bool WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override {
aWorkerPrivate->AssertIsOnWorkerThread();
mProxy->Update(mConnectionType, mIsWifi, mDHCPGateway);
return true;
}
};
} // anonymous namespace
/* static */
already_AddRefed<ConnectionWorker> ConnectionWorker::Create(
WorkerPrivate* aWorkerPrivate, ErrorResult& aRv) {
bool shouldResistFingerprinting =
aWorkerPrivate->GlobalScope()->ShouldResistFingerprinting();
RefPtr<ConnectionWorker> c = new ConnectionWorker(shouldResistFingerprinting);
c->mProxy = ConnectionProxy::Create(aWorkerPrivate, c);
if (!c->mProxy) {
aRv.ThrowTypeError("The Worker thread is shutting down.");
return nullptr;
}
hal::NetworkInformation networkInfo;
RefPtr<InitializeRunnable> runnable =
new InitializeRunnable(aWorkerPrivate, c->mProxy, networkInfo);
runnable->Dispatch(Canceling, aRv);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
c->Update(static_cast<ConnectionType>(networkInfo.type()),
networkInfo.isWifi(), networkInfo.dhcpGateway(), false);
return c.forget();
}
ConnectionWorker::ConnectionWorker(bool aShouldResistFingerprinting)
: Connection(nullptr, aShouldResistFingerprinting) {
MOZ_ASSERT(IsCurrentThreadRunningWorker());
}
ConnectionWorker::~ConnectionWorker() { Shutdown(); }
void ConnectionWorker::ShutdownInternal() {
MOZ_ASSERT(IsCurrentThreadRunningWorker());
mProxy->Shutdown();
}
void ConnectionProxy::Notify(const hal::NetworkInformation& aNetworkInfo) {
MOZ_ASSERT(NS_IsMainThread());
RefPtr<NotifyRunnable> runnable =
new NotifyRunnable(mWorkerRef->Private(), this,
static_cast<ConnectionType>(aNetworkInfo.type()),
aNetworkInfo.isWifi(), aNetworkInfo.dhcpGateway());
runnable->Dispatch();
}
void ConnectionProxy::Shutdown() {
MOZ_ASSERT(IsCurrentThreadRunningWorker());
// Already shut down.
if (!mConnection) {
return;
}
mConnection = nullptr;
RefPtr<ShutdownRunnable> runnable =
new ShutdownRunnable(mWorkerRef->Private(), this);
ErrorResult rv;
// This runnable _must_ be executed.
runnable->Dispatch(Killing, rv);
if (NS_WARN_IF(rv.Failed())) {
rv.SuppressException();
}
mWorkerRef = nullptr;
}
} // namespace mozilla::dom::network
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