2

I am trying to create an UDP server and client. How can I check if client is "connected" or has disconnected? Since UDP is not really a Connection. How does multiplayer games do it?

Improve this question
1
  • I don't know how multiplayer games do it but if you need to implement certain type of connection over UDP you have to implement your own application layer protocol. Commented Dec 29, 2014 at 17:45

1 Answer 1

Reset to default
2

Have you ever played a first person game and at some point lost internet connection? You should have gotten a message with a countdown before it automatically disconnects you. Have a look at this picture and notice in the top right the countdown to a timeout.

enter image description here

UDP maintains the connection by continuously sending and receiving packets. So as an example if for 30 seconds the server hasn't received anything from a client it can presume the client disconnected without letting the server know (disconnected by timeout).

The implementation is usually quite straightforward: use a timer and reset it each time you receive a packet, if the timer goes over the TIMEOUT_VALUE then disconnect this client.

Improve this answer
Sign up to request clarification or add additional context in comments.

Comments

Start asking to get answers

Find the answer to your question by asking.

Ask question

Explore related questions

See similar questions with these tags.