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【QNX】Socket ServerClient 源代码

news 2025/10/21 14:50:20

1 Socket Server 源代码

服务端计划只启动一个线程，所以功能实现时使用了一些全局变量。

 1 int32_t skt_s_listen_fd{-1};
 2 pthread_t thr_server;
 3 struct sockaddr_un srv_addr;
 4 struct sockaddr_un cli_addr;
 5 std::vector<int32_t> com_fd_vec;
 6 
 7 void *serverSocketThd(void *arg)
 8 {
 9     SLOG_I("Start receive - server.");
10 
11     // listen sockfd
12     int32_t ret = listen(skt_s_listen_fd, 1);
13     if(ret == -1) 
14     {
15         SLOG_E("cannot listen the client connect request: %d - %s", errno, strerror(errno));
16         close(skt_s_listen_fd);
17         unlink(SOCK_PATH);
18         return NULL;
19     }
20     const char *ready_flag = "LeoTest";
21     while(1)
22     {
23         //have connect request use accept
24         socklen_t len = sizeof(cli_addr);
25         //accept the client
26         int32_t com_fd = accept(skt_s_listen_fd, (struct sockaddr*)(&cli_addr), &len);
27 
28         if(com_fd < 0) 
29         {
30             SLOG_E("cannot accept client connect request: %d - %s", errno, strerror(errno));
31             close(skt_s_listen_fd);
32             unlink(SOCK_PATH);
33             return NULL;
34         }
35     
36         char buf[64] = {0};
37         int32_t recv_size(0);
38 
39         recv_size = read(com_fd, buf, 10);
40         SLOG_I("Socket readed [%d] info: %s", com_fd, buf);
41         if (0 == strncmp(buf, ready_flag, 5))
42         {
43             com_fd_vec.push_back(com_fd);
44         }
45     }
46 
47     return NULL;
48 }
49 
50 void socket_server_init()
51 {
52     int32_t ret;
53     SLOG_I("Init socket start[%s].", SOCK_PATH);
54  
55     skt_s_listen_fd = socket(AF_UNIX, SOCK_STREAM, 0);
56     if(skt_s_listen_fd < 0) {
57         SLOG_E("cannot create communication socket: %d - %s", errno, strerror(errno));
58         return ;
59     }
60 
61     // set server addr_param
62     srv_addr.sun_family = AF_UNIX;
63     strcpy(srv_addr.sun_path, SOCK_PATH);
64     unlink(SOCK_PATH);
65 
66     // bind sockfd & addr
67     ret = bind(skt_s_listen_fd, (struct sockaddr*)&srv_addr, sizeof(srv_addr));
68     if(ret == -1) {
69         SLOG_E("cannot bind server socket[%s]: %d - %s", SOCK_PATH, errno, strerror(errno));
70         close(skt_s_listen_fd);
71         unlink(SOCK_PATH);
72         return ;
73     }
74     // scheduler_ = new std::thread(&serverSocketThd, nullptr);
75     if (EOK != pthread_create(&thr_server, NULL, serverSocketThd, nullptr)) {
76         SLOG_E("create connect thread failed: %d - %s", errno, strerror(errno));
77     }
78     else {
79     }
80 
81     SLOG_I("Init socket end.");
82 }

2 Socket Client 源代码

客户端计划启动多个（如：30个）线程，所以客户端实现时没有使用全局变量，尽量做到线程无关。

void socket_client_init(int *enter);int sendMsg_client_ready(int fd)
{char buf_send[] = "READY";SLOG_I("send READY to svr.");return write(fd, buf_send, sizeof(buf_send));
}// recv message
void *recv_client_thread(void *arg)
{if (NULL == arg){SLOG_E("[recv_client_thread]param is not allow NULL.");return NULL;}SLOG_I("[recv_client_thread]receive thread starting<tid=%lu>...", pthread_self());RecvModel *model = (RecvModel *)arg;ssize_t flag = 0;unsigned char buf_recv[64] = {0};ssize_t length = 0;usleep(300);SLOG_D("create communication send data");sendMsg_client_ready(model->st);SLOG_D("create communication send data end");while(true){flag = recv(model->st, buf_recv, sizeof(buf_recv), 0);if (0 == flag){   // 需要考虑重连机制SLOG_E("[recv_client_thread]remote already close connect.");break;}else if (-1 == flag){   // 需要考虑重连机制SLOG_E("[recv_client_thread]recv failed. error message : %s", strerror(errno));break;}length = flag;SLOG_D("receive data(length: %d): %s", length, buf_recv);memset(buf_recv, 0, sizeof(buf_recv));}close(model->st);return NULL;
}void *client_connect_thread(void *arg)
{SLOG_I("[client_connect_thread]enter: 0x%x", arg);if(NULL != arg) {int *enter = (int *)arg;SLOG_I("[client_connect_thread]enter[%d]...", *enter);int connect_fd;int ret;int count_connect = 0;static struct sockaddr_un srv_addr;// char sock_path_str[128] = {0};
    SLOG_I("create communication socket...");// create unix socketconnect_fd = socket(PF_UNIX, SOCK_STREAM, 0);if(connect_fd < 0) {SLOG_E("cannot create communication socket");return NULL;}SLOG_D("create communication socket end");srv_addr.sun_family = AF_UNIX;// sprintf(sock_path_str, SOCK_PATH, count);
        strcpy(srv_addr.sun_path, SOCK_PATH);// connect serverret = connect(connect_fd, (struct sockaddr*)&srv_addr, sizeof(srv_addr));SLOG_I("create communication connect end: %d", ret);while(-1 == ret) {count_connect++;SLOG_W("connect to the server failed, trying no. %d", count_connect);sleep(1);ret = connect(connect_fd, (struct sockaddr*)&srv_addr, sizeof(srv_addr));}RecvModel model;model.st = connect_fd;model.addr = &srv_addr;// 开启线程--接收线程
        pthread_t thr_recv;if (pthread_create(&thr_recv, NULL, recv_client_thread, &model) != 0){SLOG_E("create recv thread failed");}else{SLOG_I("create communication pthread join");pthread_join(thr_recv, NULL);SLOG_W("create communication pthread join end");}}
}void socket_client_init(int *enter)
{pthread_t thr_connect;SLOG_I("* * * * * * * * * * * * * * * * * * [socket_client_init]starting[%d]...", *enter);{if (EOK != pthread_create(&thr_connect, NULL, client_connect_thread, (void *)enter)){SLOG_E("create connect thread failed");}else{// pthread_join(thr_connect, NULL);     // PTHREAD_CREATE_JOINABLE 属性(默认值)需要调用此函数 - 此函数会阻塞直到线程退出
        }}
}

3 调用示例代码

因为测试代码是写在同一个应用中，所以使用命令行参数进行区分【将命令行参数转化为控制变量: isSktFlag】

    if(2 == isSktFlag) {// socket client: connect to serverfor(int i = 0; i < 30; i++) {SLOG_D("[socket] client start %d...", i);socket_client_init(&i);std::this_thread::sleep_for(std::chrono::milliseconds(100));}std::this_thread::sleep_for(std::chrono::milliseconds(1000 * 1000));    // 因为后面还有其它测试代码, 所以增加此行延时
    }else if(1 == isSktFlag) {SLOG_D("[socket] server start...");socket_server_init();std::this_thread::sleep_for(std::chrono::milliseconds(1000 * 1000));    // 因为后面还有其它测试代码, 所以增加此行延时
    }