Socket In TIME_WAIT on Client when exit, but not on restart

RAZ_Muh_Taz

2/2/24, 9:53 PM

Linux Server (port 7000)

Windows Client (port 8585)

Scenario 1: Client Restart

Restart on client
Server socket read returns -1, gets errno 104, Connection reset by peer
Server closes its socket connection to the client
Client calls close on its socket
Client restarts and is able to connect right away to Server

Scenario 2: Client Exit

Exit on client
Server socket read returns 0, gets errno 11, Resource temporarily unavailable
Server closes its socket connection to the client
Client calls close on its socket
Client netstat shows

TCP Client IP:8585 Server:7000 TIME_WAIT InHost

What is causing the server socket read to return 0 on restart, and not -1 with errno 104?

The client is calling the shutdown/close on the windows socket for both restart/exit. I understand what the TIME_WAIT state is for TCP. But I don't understand what is causing this TIME_WAIT.

Wireshark Restart: There is a TCP [RST, ACK] from the Server

Wireshark Exit: There is a TCP [FIN, ACK] from the Server

Not sure why they would differ if I am calling the same close method for the client socket.

138

0 + 2

windows

tcp

linux-networking

Greg Askew

2/2/24, 11:08 PM

Already answered here: https://superuser.com/questions/173535/what-are-close-wait-and-time-wait-states and here: https://learn.microsoft.com/en-us/answers/questions/230227/time-wait-from-netstat

RAZ_Muh_Taz

2/3/24, 7:00 PM

Why can i reconnect to the server right away on a restart. But when i exit and then reopen the client, it takes 2 minutes to connect? Doesn't make sense. I should have the same behavior for both and I don't.

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: Socket In TIME_WAIT on Client when exit, but not on restart

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