套接字允许多个客户端

Question

我有非常简单的服务器和聊天程序，但我不知道如何允许多个客户端。 大部分代码是我们从学校的老师那里得到的。

 int sock_desc = socket(AF_INET, SOCK_STREAM, 0);
 char ccc = '\n';
 char * p_buf;
 if (sock_desc == -1) {
   printf("cannot create socket!\n");
   return 0;
 }

 // configure socket
 struct sockaddr_in server;
 memset( & server, 0, sizeof(server));
 server.sin_family = AF_INET;
 // INADDR_ANY = 0.0.0.0
 server.sin_addr.s_addr = INADDR_ANY;
 server.sin_port = htons(7777);
 if (bind(sock_desc, (struct sockaddr * ) & server, sizeof(server)) != 0) {
   printf("cannot bind socket!\n");
   close(sock_desc);
   return 0;
 }
 // 20max connections
 if (listen(sock_desc, 20) != 0) {
   printf("cannot listen on socket!\n");
   close(sock_desc);
   return 0;
 }

 struct sockaddr_in client;
 memset( & client, 0, sizeof(client));
 socklen_t len = sizeof(client);
 int temp_sock_desc = accept(sock_desc, (struct sockaddr * ) & client, & len);
 if (temp_sock_desc == -1) {
   printf("cannot accept client!\n");
   close(sock_desc);
   return 0;
 }

 char buf[200];
 int k;

 int Second_sock_desc = socket(AF_INET, SOCK_STREAM, 0);
 if (Second_sock_desc == -1) {
   printf("cannot create socket!\n");
   return 0;
 }

 // configure socket
 struct sockaddr_in Second_client;
 memset( & Second_client, 0, sizeof(Second_client));
 Second_client.sin_family = AF_INET;
 Second_client.sin_addr.s_addr = inet_addr("127.0.0.1");
 Second_client.sin_port = htons(17777);

 // connect socket
 if (connect(Second_sock_desc, (struct sockaddr * ) & Second_client, sizeof(Second_client)) != 0) {
   printf("cannot connect to server!\n");
   close(Second_sock_desc);
 }

 while (1) {
   // SEND RECV STUFF
 }

 close(temp_sock_desc);
 close(sock_desc);
 close(Second_sock_desc);
 printf("server disconnected\n");
 return 0;
 }

我发现我需要为accept()函数进行一些while(1)循环并接收/发送内容，因此我尝试了一下，但仍然无法正常工作。 我的目标是在没有一些太高级的东西的情况下使其变得容易，但是我不知道该怎么做。 感谢您的帮助。