TCP socket in Unix - notify server I am done sending

Question

I have a tiny little TCP app where many clients connect to a server, send data to it (via write() - they are also sending message size) and then exit. I have the clients sen

Answer 1

This is done at the application level. In HTTP it is done by closing the socket for a response. Also in HTTP after the server receives two returns, it knows the GET request has finished sending then if there is a content-length header, it knows that the client/server is finished sending after X bytes.

You will need to implement something similar.