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// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/updater/update_block_check.h"
#include <netlistmgr.h>
#include <wrl/client.h>
#include <utility>
#include "base/functional/callback.h"
#include "base/task/task_traits.h"
#include "base/task/thread_pool.h"
#include "base/win/windows_version.h"
#include "chrome/updater/update_service.h"
namespace updater {
namespace {
// Returns true in situations where we allow background updates on metered
// networks.
bool AllowBackgroundUpdatesOnMeteredNetwork() {
// TODO(crbug.com/40199605): Modify this function to enable background updates
// on metered networks when a toggle is set in the browser.
return true;
}
bool IsConnectionedMetered() {
// Because NLM could deadlock in Win10 versions pre-RS5, don't run the code
// for those versions (see crbug.com/1254492).
if (base::win::GetVersion() < base::win::Version::WIN10_RS5) {
return false;
}
Microsoft::WRL::ComPtr<INetworkCostManager> network_cost_manager;
HRESULT hr = ::CoCreateInstance(CLSID_NetworkListManager, nullptr, CLSCTX_ALL,
IID_PPV_ARGS(&network_cost_manager));
if (FAILED(hr)) {
return false;
}
DWORD cost = NLM_CONNECTION_COST_UNKNOWN;
hr = network_cost_manager->GetCost(&cost, nullptr);
if (FAILED(hr)) {
return false;
}
return cost != NLM_CONNECTION_COST_UNKNOWN &&
(cost & NLM_CONNECTION_COST_UNRESTRICTED) == 0;
}
} // namespace
void ShouldBlockUpdateForMeteredNetwork(
UpdateService::Priority priority,
base::OnceCallback<void(bool)> callback) {
if (priority == UpdateService::Priority::kForeground ||
AllowBackgroundUpdatesOnMeteredNetwork()) {
std::move(callback).Run(false);
} else {
base::ThreadPool::PostTaskAndReplyWithResult(
FROM_HERE, {base::MayBlock()}, base::BindOnce(&IsConnectionedMetered),
std::move(callback));
}
}
} // namespace updater
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