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Re: [lwip-users] LWIP and its keep-alive feature - does it work?
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From: |
Simon Goldschmidt |
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Subject: |
Re: [lwip-users] LWIP and its keep-alive feature - does it work? |
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Date: |
Tue, 20 Dec 2022 17:42:53 +0100 |
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User-agent: |
K-9 Mail for Android |
Peter <peter@peter2000.co.uk> wrote:
>
>[..] if say the server is rebooted during a connection, the
>connection is not re-established. Maybe that is how it is supposed to
>work
Yes, that's why it is called "keepalive", not "re-establish broken
connections". By the way, it's not an lwip thing but an implementation of
generic TCP concepts.
> i.e. if one wanted to re-establish a connection in such a
>situation, the client should be sending out regular "real" packets,
>not KA packets.
Exactly. If the server is restarted, there's no way a keepalive packet would do
anything good. You need to send SYN packets to establish a new connection.
Regards,
Simon