84 lines
2.9 KiB
C++
84 lines
2.9 KiB
C++
//
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// driver_handler.hpp
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//
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// Copyright (c) 2019 2020 Andrea Bondavalli. All rights reserved.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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//
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#ifndef _DRIVER_HANDLER_HPP_
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#define _DRIVER_HANDLER_HPP_
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#include <future>
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#include "MT_ALSA_message_defs.h"
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#include "config.hpp"
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#include "error_code.hpp"
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#include "log.hpp"
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#include "netlink_client.hpp"
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class DriverHandler {
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public:
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static constexpr size_t max_payload = MAX_PAYLOAD;
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static constexpr off_t data_offset =
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sizeof(struct MT_ALSA_msg) /*+ sizeof(int)*/;
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static constexpr int reply_timeout_secs = 1; // 1sec in driver
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static constexpr size_t buffer_size =
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NLMSG_SPACE(max_payload) + sizeof(struct MT_ALSA_msg);
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DriverHandler(){};
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DriverHandler(const DriverHandler&) = delete;
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DriverHandler& operator=(const DriverHandler&) = delete;
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virtual ~DriverHandler() { terminate(); };
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virtual bool init(const Config& config);
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virtual bool terminate();
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protected:
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virtual void send_command(enum MT_ALSA_msg_id id,
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size_t size = 0,
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const uint8_t* data = nullptr);
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virtual void on_command_done(enum MT_ALSA_msg_id id,
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size_t size = 0,
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const uint8_t* data = nullptr) = 0;
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virtual void on_command_error(enum MT_ALSA_msg_id id,
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std::error_code error) = 0;
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virtual void on_event(enum MT_ALSA_msg_id id,
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size_t& res_size,
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uint8_t* res,
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size_t req_size = 0,
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const uint8_t* req = nullptr) = 0;
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virtual void on_event_error(enum MT_ALSA_msg_id id,
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std::error_code error) = 0;
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private:
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void send(enum MT_ALSA_msg_id id,
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NetlinkClient& client,
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uint8_t* buffer,
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size_t data_size,
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const uint8_t* data);
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bool event_receiver();
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std::future<bool> res_;
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std::atomic_bool running_{false};
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uint8_t command_buffer_[buffer_size];
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uint8_t event_buffer_[buffer_size];
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uint8_t response_buffer_[buffer_size];
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NetlinkClient client_u2k_{"commands"}; /* u2k for commands */
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NetlinkClient client_k2u_{"events"}; /* k2u for events */
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std::mutex mutex_; /* one command at a time */
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};
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#endif
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