| // Copyright 2020 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef SRC_DEVELOPER_FORENSICS_CRASH_REPORTS_NETWORK_WATCHER_H_ |
| #define SRC_DEVELOPER_FORENSICS_CRASH_REPORTS_NETWORK_WATCHER_H_ |
| |
| #include <fuchsia/netstack/cpp/fidl.h> |
| #include <lib/async/cpp/task.h> |
| #include <lib/async/dispatcher.h> |
| #include <lib/fit/function.h> |
| #include <lib/sys/cpp/service_directory.h> |
| |
| #include <vector> |
| |
| #include "src/lib/backoff/exponential_backoff.h" |
| |
| namespace forensics { |
| namespace crash_reports { |
| |
| // Notifies interested parties when the network reachability status changes and manages the FIDL |
| // connection with the service that sends status change events. |
| // |
| // fuchsia.netstack.Netstack is expected to be in |services_|. |
| class NetworkWatcher { |
| public: |
| NetworkWatcher(async_dispatcher_t* dispatcher, std::shared_ptr<sys::ServiceDirectory> services); |
| |
| // Register a callback to be called when the network reachability status changes. |
| void Register(::fit::function<void(bool)> on_reachable); |
| |
| private: |
| void Watch(); |
| |
| async_dispatcher_t* dispatcher_; |
| const std::shared_ptr<sys::ServiceDirectory> services_; |
| |
| fuchsia::netstack::NetstackPtr netstack_; |
| |
| backoff::ExponentialBackoff backoff_; |
| async::TaskClosureMethod<NetworkWatcher, &NetworkWatcher::Watch> watch_task_{this}; |
| |
| std::vector<::fit::function<void(bool)>> callbacks_; |
| }; |
| |
| } // namespace crash_reports |
| } // namespace forensics |
| |
| #endif // SRC_DEVELOPER_FORENSICS_CRASH_REPORTS_NETWORK_WATCHER_H_ |