C++ 함수는 네트워크 프로그래밍에서 서버측 소켓을 어떻게 설정하고 관리합니까?

#include <iostream>
#include <sys/socket.h>
#include <netinet/in.h>

int main() {
  // 创建套接字
  int server_fd = socket(AF_INET, SOCK_STREAM, 0);
  if (server_fd == -1) {
    std::cerr << "socket() failed" << std::endl;
    return -1;
  }

  // 绑定套接字
  struct sockaddr_in server_addr;
  server_addr.sin_family = AF_INET;
  server_addr.sin_port = htons(8080);
  server_addr.sin_addr.s_addr = htonl(INADDR_ANY);
  int bind_result = bind(server_fd, (struct sockaddr *) &server_addr, sizeof(server_addr));
  if (bind_result == -1) {
    std::cerr << "bind() failed" << std::endl;
    return -1;
  }

  // 监听套接字
  int listen_result = listen(server_fd, 5);
  if (listen_result == -1) {
    std::cerr << "listen() failed" << std::endl;
    return -1;
  }

  // ... // 处理客户端连接的代码
}

#include <iostream>
#include <sys/socket.h>
#include <netinet/in.h>
#include <unistd.h>  // for close()

int main() {
  // 创建套接字
  int server_fd = socket(AF_INET, SOCK_STREAM, 0);
  if (server_fd == -1) {
    std::cerr << "socket() failed" << std::endl;
    return -1;
  }

  // 绑定套接字
  struct sockaddr_in server_addr;
  server_addr.sin_family = AF_INET;
  server_addr.sin_port = htons(8080);
  server_addr.sin_addr.s_addr = htonl(INADDR_ANY);
  int bind_result = bind(server_fd, (struct sockaddr *) &server_addr, sizeof(server_addr));
  if (bind_result == -1) {
    std::cerr << "bind() failed" << std::endl;
    return -1;
  }

  // 监听套接字
  int listen_result = listen(server_fd, 5);
  if (listen_result == -1) {
    std::cerr << "listen() failed" << std::endl;
    return -1;
  }

  // 接受客户端连接
  int client_fd;
  while ((client_fd = accept(server_fd, (struct sockaddr *) NULL, NULL)) != -1) {
    // 为客户端创建子进程进行处理
    if (fork() == 0) {
      // ... // 处理客户端连接的代码
      close(client_fd);
      exit(0);
    }
  }

  // 关闭套接字
  close(server_fd);

  return 0;
}