when client send msg by UDP, How to know the IP of client?
-
Now I have a computer as server,there are some device connect to my computer as client. Those device always send message to my computer by UDP , and I make a programme to receive those messages.
const QString IP_ADDRESS = "192.168.15.114"; const int PORT = 23333; //... rece_UDP = new new QUdpSocket(this); rece_UDP->bind(QHJostAddress(IP_ADDRESS),PORT); //...those device send messages to this IP(IP of my computer),and I can receive those message,and ......I need send message back by UDP....
Now there is a problem, the message from device don't include IP of device, i need know the IP oo device so i can send message back.But how to know the IP of these device?
My bosssay there's a methon that can get client's IP when the client send message by UDP...
If my boss is right ( As you know , boss is awlays right....),how to get client's IP when client send the message by UDP? -
In Qt you have a function http://doc.qt.io/qt-5/qudpsocket.html#readDatagram and you can read ip of sender from this function.
Here you have also tutorial how to use it: http://www.bogotobogo.com/Qt/Qt5_QUdpSocket.php. -
Now I have a computer as server,there are some device connect to my computer as client. Those device always send message to my computer by UDP , and I make a programme to receive those messages.
const QString IP_ADDRESS = "192.168.15.114"; const int PORT = 23333; //... rece_UDP = new new QUdpSocket(this); rece_UDP->bind(QHJostAddress(IP_ADDRESS),PORT); //...those device send messages to this IP(IP of my computer),and I can receive those message,and ......I need send message back by UDP....
Now there is a problem, the message from device don't include IP of device, i need know the IP oo device so i can send message back.But how to know the IP of these device?
My bosssay there's a methon that can get client's IP when the client send message by UDP...
If my boss is right ( As you know , boss is awlays right....),how to get client's IP when client send the message by UDP?
