C [UDP]如何跟踪服务器上的所有连接(客户端)套接字连接

Question

我的服务器应将收到的消息转发给所有已连接的客户端，但我的代码只能将消息发送回发送者。

struct User
{
    char user_id[20];
    string address;
    struct sockaddr_in CONNECTED;
}U[8];
//USER LOGIN
    for(int i = 0; i < 8; i++)
    {
        //DO THIS WHEN USER MATCHED
        //user_id consists of Andrew, Lisa, David and etc
        //so that each unique name has a unique connection(CONNECTED)
        if(strcmp(user_id,U[i].user_id) == 0)
        {
            U[i].CONNECTED = cln_addr;
        }
    }
        //AFTER RECEIVING THE MESSAGE FROM CLIENT, SEND THE MESSAGE BACK TO ALL CONNECTED CLIENTS
        for(int i = 0; i < 8; i++)
    {
        sendto (*csock, BROADCASTMESSAGE, sizeof BROADCASTMESSAGE, 0, (struct sockaddr *)&U[i].CONNECTED, len_c_addr); //THIS HOWEVER ONLY FORWARD MESSAGE BACK TO THE SENDER
    }

Answer 1

当您在服务器套接字中接受套接字时，将其存储在数组列表中。当客户端消失时，将其从数组中删除。

使用此数组可以将数据发送和广播数据。