Re: [lwip-users] Raw TCP, intermittent long delays in accept after after close

[Geoff Simmons]

> On 10/20/22 21:53, goldsimon@gmx.de wrote:
> > See these comments on tcp_abort:
> >
> > "The pcb is deallocated"
> >
> > and
> >
> > "ATTENTION: When calling this from one of the TCP callbacks, make
> > sure you always return ERR_ABRT (and never return ERR_ABRT otherwise
> > or you will risk accessing deallocated memory or memory leaks!"

For future readers searching the mail archive -- this has been 
corrected, and the fix appears to have eliminated the problem. The long 
delays on accept have not happened again, after invoking the test script 
many times.

The behavior I had described was supposed to have been for the case that 
tcp_close() returns ERR_MEM -- retain the pcb so that there is an 
opportunity for memory to be freed, and the close can be completed later 
in another callback. I had the error handling cases for tcp_close() 
mixed up.


Thanks for you help!
Geoff