返回打开的套接字连接/保持套接字连接打开C++

#include <iostream>
#include <sys/socket.h>
#include <arpa/inet.h>

int socket_fd = socket(AF_INET, SOCK_STREAM, 0);

int opt = 1;
setsockopt(socket_fd, SOL_SOCKET, SO_REUSEADDR | SO_REUSEPORT, &opt, sizeof(opt));

struct sockaddr_in server_address;
server_address.sin_family = AF_INET;
server_address.sin_addr.s_addr = INADDR_ANY;
server_address.sin_port = htons(8080); // 选择一个可用的端口号

bind(socket_fd, (struct sockaddr*)&server_address, sizeof(server_address));

listen(socket_fd, 5);

struct sockaddr_in client_address;
socklen_t client_address_length = sizeof(client_address);
int client_socket_fd = accept(socket_fd, (struct sockaddr*)&client_address, &client_address_length);

// 在这里进行与客户端的通信操作，可以发送和接收数据等

// 关闭连接
close(client_socket_fd);