closing a previously opened socket

Question

I created a program which listens to particular socket in python, however I ctrl+c'd script which resulted in .close() nor called, however how can I free the socket now.

Are you asking how can free the socket now? Or how can you free the socket if the termination signal is recd.? — Devraj, Sep 09 '12 at 05:02

user207421 · Answer 1 · 2012-09-09T05:30:11.923

3

The socket is closed when the process exits. The port it was using may hang around for a couple of minutes, that's normal, then it will disappear. If you need to re-use the port immediately, set SO_REUSEADDR before binding or connecting.

edited Sep 09 '12 at 05:30

answered Sep 09 '12 at 05:08

user207421

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can you explain how to do SO_REUSEADDR – Vaibhav Mishra Sep 09 '12 at 05:14
@VaibhavMishra Why? It's well documented. That would just be repeating someone else's work. Look it up. – user207421 Aug 15 '23 at 04:46

score 0 · Answer 2 · answered Sep 09 '12 at 06:41

Set the SO_REUSEADDR socket option before calling the bind method, like this:

sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)

That will instruct the socket to freely reuse the ports left in a waiting state by recent runs of the program.

Or, use the SocketServer.TCPServer class from the standard library, which will automatically do this if you set the allow_reuse_address property on the server instance to a true value.

closing a previously opened socket

2 Answers2