1/*
2 * Copyright (c) Huawei Technologies Co., Ltd. 2022. All rights reserved.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 *     http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15#ifndef HIEBPF_IPC_UNIX_SOCKET_H_
16#define HIEBPF_IPC_UNIX_SOCKET_H_
17
18#include <functional>
19#include <string>
20#include <thread>
21
22namespace OHOS {
23namespace Developtools {
24namespace Hiebpf {
25const std::string UNIX_SOCKET_DEFAULT_PATHNAME = "/dev/unix/socket/hiebpf";
26const size_t UNIX_SOCKET_BUFFER_SIZE = 64;
27// this Unix socket server don't support multiple clients
28const int UNIX_SOCKET_LISTEN_COUNT = 1;
29
30class IpcUnixSocketServer {
31public:
32    IpcUnixSocketServer();
33    ~IpcUnixSocketServer();
34
35    bool Start(const std::string &pathname = UNIX_SOCKET_DEFAULT_PATHNAME);
36    bool Stop();
37
38    using HandleCallBack = std::function<void(const void *buf, size_t size)>;
39    void SetHandleCallback(HandleCallBack fn)
40    {
41        handleMessageFn_ = fn;
42    }
43
44    // SendMessage can be called by HandleCallBack
45    bool SendMessage(const void *buf, size_t size);
46
47private:
48    std::string pathName_;
49    std::thread handleThread_;
50    HandleCallBack handleMessageFn_;
51    int serverFd_ = -1;
52    int clientFd_ = -1;
53    bool isRunning_ = false;
54
55    void HandleThreadLoop();
56};
57
58class IpcUnixSocketClient {
59public:
60    IpcUnixSocketClient();
61    ~IpcUnixSocketClient();
62
63    bool Connect(const std::string &pathname = UNIX_SOCKET_DEFAULT_PATHNAME);
64    void Disconnect();
65
66    bool SendMessage(const void *buf, size_t size);
67    /* size is size of buf when input, is size of recved data when output.
68       timeout is milliseconds */
69    bool RecvMessage(void *buf, size_t &size, uint32_t timeout);
70
71private:
72    int sockFd_ = -1;
73};
74} // namespace Hiebpf
75} // namespace Developtools
76} // namespace OHOS
77#endif // HIEBPF_IPC_UNIX_SOCKET_H_
78