TCP简单的服务端代码（C语言）

#include <stdio.h>
#include <strings.h>    //bzero
#include <unistd.h>     //close
#include <sys/socket.h> //socket
#include <netinet/in.h> //struct sockaddr_in
#include <arpa/inet.h>  //inet_addr
int main(int argc, char const *argv[])
{
    // 1.创建套接字
    int sockfd = socket(AF_INET, SOCK_STREAM, 0);
    if (sockfd < 0)
    {
        perror("socket");
        return -1;
    }
    // 2.绑定bind
    struct sockaddr_in my_addr;
    my_addr.sin_family = AF_INET;
    my_addr.sin_port = htons(8000);
    my_addr.sin_addr.s_addr = htonl(INADDR_ANY); // 机器的所有可用IP地址
    int ret = bind(sockfd, (struct sockaddr *)&my_addr, sizeof(my_addr));
    if (ret != 0)
    {
        perror("bind");
        return -1;
    }
    // 3.监听
    int backlog = 10;
    ret = listen(sockfd, backlog);
    if (ret < 0)
    {
        perror("listen");
        return -1;
    }
    // 4.提取，等待一个客户端连接
    struct sockaddr_in cli_addr;
    socklen_t len = sizeof(cli_addr);
    int sockfd_new = accept(sockfd, (struct sockaddr *)&cli_addr, &len);
    if (sockfd_new < 0)
    {
        perror("accept");
        return -1;
    }
    // 5.接收数据
    char buf[1024] = "";
    char ip[16] = "";
    while (1)
    {
        bzero(buf, sizeof(buf));
        recv(sockfd_new, buf, sizeof(buf), 0);
        inet_ntop(AF_INET, (void *)&cli_addr.sin_addr, ip, 16);
        printf("%s:%hu--->%s\n", ip, ntohs(cli_addr.sin_port), buf); // ip port buf
        send(sockfd_new, "ok", sizeof("ok"), 0);                     // 发送消息
    }
    // 6.关闭套接字
    close(sockfd_new);
    close(sockfd);
    return 0;
}