Re: [lwip-users] Performance drop due port numbers reused too fast

[Jochen Strohbeck]

Hello Indan,

> Was the connection closed properly by both sides when this happens?
According to the trace it is only closed by the client (sending FIN,
getting ACK) although the server calls lwip close()...
I guess this is called "half-closed" and I thought this is a feature of
TCP / lwip to improve performance by reducing handshake overhead?

Do you think the server should close the connection too by sending
FIN/ACK in order to get rid of the problem?

> Personally I've only seen lwIP sending RST, never an ACK for re-used ports.
That's what I thought first too

> What lwIP version are you using and is the ACK problem gone with master?
Still on 1.4.1 due newer lwip versions are incompatible to the E70 GMAC
driver and there are no efforts from the manufacturer to update the driver.

Thanks,
Jochen