Finding out if a message over tcp was delivered

Question

When i send()/write() a message over a tcp stream, how can i find out if those bytes were successfully delivered?

The receiver acknowledges receiving the bytes via t

Answer 1

The TCP protocol tries very hard to make sure your data arrives. If there is a network problem, it will retransmit the data a few times. That means anything you send is buffered and there is no timely way to make sure it has arrived (there will be a timeout 2 minutes later if the network is down).

If you need a fast feedback, use the UDP protocol. It doesn't use any of the TCP overhead but you must handle all problems yourself.