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[lwip-users] tcp_err and tcp_close

From: Nadav Popplewell
Subject: [lwip-users] tcp_err and tcp_close
Date: Thu, 20 Dec 2018 13:15:05 +0000

Hi everybody,


Please excuse me if I’m asking a silly question, but I’m now clear about the state of the PCB when tcp_err is called.


The documentation states: The error callback function does not get the pcb passed to it as a parameter since the pcb may already have been deallocated.


What I have a problem with is the may bit,

Is the pcb deallocated or not?

I know from experience that if tcp_err is called because tcp_connect failed then the PCB is deallocated and should NOT be closed by my code.

But is this always the case?






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