| /* |
| * Copyright (C) 2017 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| #pragma once |
| |
| #include <functional> |
| #include <map> |
| #include <memory> |
| #include <mutex> |
| |
| #include <netlink/genl/genl.h> |
| |
| #include "common/commands/wifi_relay/cmd.h" |
| |
| namespace cvd { |
| |
| class NlClient { |
| public: |
| NlClient(int nl_type); |
| ~NlClient() = default; |
| |
| // Init this client: set up callback & open socket. |
| bool Init(); |
| |
| // Get netlink socket used for sending and receiving messages. |
| nl_sock* Sock() const; |
| |
| // Send message to netlink. Supplied callback will be invoked when response is |
| // received. |
| void Send(Cmd* msg); |
| |
| // Set callback receiving all asynchronous messages and responses that do not |
| // have any proper recipient. |
| // This is useful in situations, where netlink sends asynchronous event |
| // notifications, such as new MAC80211 HWSIM frame. |
| void SetDefaultHandler(std::function<void(nl_msg*)> cb); |
| |
| private: |
| // Receive & dispatch netlink response. |
| int OnResponse(nl_msg* msg); |
| |
| int nl_type_; |
| |
| std::unique_ptr<nl_cb, void (*)(nl_cb*)> callback_; |
| std::unique_ptr<nl_sock, void (*)(nl_sock*)> sock_; |
| std::mutex in_flight_mutex_; |
| std::map<uint32_t, Cmd*> in_flight_; |
| std::function<void(nl_msg*)> default_handler_; |
| |
| NlClient(const NlClient&) = delete; |
| NlClient& operator=(const NlClient&) = delete; |
| }; |
| |
| } // namespace cvd |