vxworks套接字使用例子

以下是一个简单的 VxWorks 套接字使用例子，用于在本地机器上创建一个 TCP 服务器：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <arpa/inet.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <unistd.h>

#define PORT_NUM 8080
#define BUF_SIZE 1024

void handle_client(int client_socket) {
    char buf[BUF_SIZE];
    memset(buf, 0, sizeof(buf));
    int n;
    while ((n = read(client_socket, buf, sizeof(buf))) > 0) {
        printf("Received message: %s\n", buf);
        write(client_socket, buf, n);
        memset(buf, 0, sizeof(buf));
    }
    close(client_socket);
}

int main() {
    int server_socket = socket(AF_INET, SOCK_STREAM, 0);
    if (server_socket < 0) {
        perror("Failed to create socket");
        exit(EXIT_FAILURE);
    }

    int option = 1;
    if (setsockopt(server_socket, SOL_SOCKET, SO_REUSEADDR, &option, sizeof(option)) < 0) {
        perror("Failed to set socket option");
        exit(EXIT_FAILURE);
    }

    struct sockaddr_in server_addr = {0};
    server_addr.sin_family = AF_INET;
    server_addr.sin_addr.s_addr = INADDR_ANY;
    server_addr.sin_port = htons(PORT_NUM);

    if (bind(server_socket, (struct sockaddr *)&server_addr, sizeof(server_addr)) < 0) {
        perror("Failed to bind socket to address");
        exit(EXIT_FAILURE);
    }

    if (listen(server_socket, 5) < 0) {
        perror("Failed to listen for connections");
        exit(EXIT_FAILURE);
    }

    printf("Waiting for connections...\n");

    struct sockaddr_in client_addr = {0};
    socklen_t client_addr_len = sizeof(client_addr);

    while (1) {
        int client_socket = accept(server_socket, (struct sockaddr *)&client_addr, &client_addr_len);
        if (client_socket < 0) {
            perror("Failed to accept connection");
            exit(EXIT_FAILURE);
        }

        printf("Accepted connection from %s:%d\n", inet_ntoa(client_addr.sin_addr), ntohs(client_addr.sin_port));

        handle_client(client_socket);
    }

    return 0;
}

这个例子创建了一个 TCP 服务器，绑定到本地机器的 8080 端口，然后等待客户端连接。一旦连接建立，服务器会接收客户端发送的消息并将其原封不动地发送回客户端。