I have created a TCP socket on Linux using C. Client connect()'s to server and server accept()'s it. When the client request has been served - or a timeout has occured - I want that socket to be totally closed.
But, although both sides call the close() function, I see in the terminal that the socket lives on for a few more minutes in the TIME_WAIT state.
The question is, how can I totally kill it?
Keep in mind that I do not need any handshake with FIN and ACK flags, that I have seen while Googling.
EDIT: I have seen this Avoiding TIME_WAIT thread, but it's 9 years old, that's why I do not fully trust it.
Also, the communication I want to achieve is inter-process communication in the local host, and it must be possible to open and close up to 100 connections per second. That's why, I do not need any handshaking. And I do not want the sockets to remain at TIME_WAIT state for neither a minute, because the OS fills with sockets and the performance is significantly decreased.
EDIT 2: Finally I used SO_REUSEPORT flag and there is no lag trying to open new connection, if the OS is alread filled up...
UDP sockets do not satisfy my program's other specs...