服务器是否可以使用相同的套接字向客户端发送响应?怎样

我正在使用Berkeley套接字(Internet域和Unix域),我想知道服务器是否可以使用相同的套接字来读取请求并向客户端写入响应。或者客户端应该创建另一个套接字来等待重播,服务器在处理收到的消息后连接到该套接字。

顺便说一下,我说的是面向连接的套接字(流套接字、TCP等等)。

这是简化的服务器代码(为了简单起见,我在这里检查系统调用的常见错误):

int main() {

    int server_socket, connected_socket;
    struct sockaddr_in server_addr;
    char buf[1024];
    char aux[256];
    int bytes_read;

    server_socket = socket(AF_INET, SOCK_STREAM, 0);    

    server_addr.sin_family = AF_INET;
    server_addr.sin_addr.s_addr = INADDR_ANY;
    server_addr.sin_port = htons(1234);
    bind(server_socket, &server_addr, sizeof(server_addr))

    listen(server_socket, 5)

    connected_sodket = accept(server_socket, 0, 0);
    do {
        bzero(buf, sizeof(buf));
        bytes_read = read(connected_socket, buf, sizeof(buf));        
    } while (bytes_read > 0);          

    /* Here I want to use connected_socket to write the reply, can I? */

    close(connected_socket);       

    close(server_socket);

    return (EXIT_SUCCESS);
}

int main() {

    int client_socket;
    struct sockaddr_in server_addr;

    client_socket = socket(AF_INET, SOCK_STREAM, 0);

    hp = gethostbyname("myhost");
    server_addr.sin_family = AF_INET;
    memcpy(&server_addr.sin_addr, hp->h_addr_list[0], hp->h_length);
    server_addr.sin_port = htons(1234);

    connect(client_socket, &server_addr, sizeof(server_addr));

    write(client_socket, MSG, sizeof(MSG));

    /* Here I want to wait for a response from the server using client_socket, can I? */

    close(client_socket);

    return (EXIT_SUCCESS);
}

connected_socket 在服务器和 client_socket

我曾尝试在显示注释的客户机/服务器中使用read/wrint,但这样两个程序都会被阻止,这似乎是一个死锁。

提前谢谢!