[lwip-users] Best way for determining if a TCP connection is dead?

[Chris Seto]

I have some code which works great, based on the echo client example.

I'm working on hardening it, and I'm wondering with how best to deal with a dead TCP connection as a result of the network link being down (ie, Ethernet cable disconnected).

The echo client contains conditions for a software termination of the socket (ie, server sends am empty frame), but I don't see anything dealing with a more blunt loss of the connection.

Any advice?

Thanks,

Chris