For example chat room an client send to server message with content "hi all"
when server received and send message to all client in room and exclude
client because that message send back to client not necessary.
Thus check client is NULL to send broadcast is not perfect, so we define function
ws_send_broadcast to fix this problem
For example chat room an client send to server message with content "hi all" when server received and send message to all client in room and exclude client because that message send back to client not necessary.
Thus check client is NULL to send broadcast is not perfect, so we define function
ws_send_broadcastto fix this problem