RE: [lwip-users] Lock-up issue with tcp_receive() and tcp_output()

[Carr, Anthony]

Hi Kieran,

I have been delving into this problem a bit more and have found an identical 
issue in the archive.
In the archive thread the user was having problems with ethernetif_input() 
being interrupted by a timer interrupt that called tcp_slowtmr() and resulted 
in the corruption of the internal packet lists.

In my application I have the reverse condition.
tcp_slowtmr() is called periodically from main() with ethernetif_input() called 
from the Ethernet interrupt.
I am assuming if the Ethernet interrupt occurs during tcp_slowtmr() this could 
possibly be the cause of the corrupted packet lists.
Am I correct in this assumption?

Thanks,

Tony

-----Original Message-----
From: address@hidden [mailto:address@hidden On Behalf Of Kieran Mansley
Sent: 13 January 2011 09:36
To: Mailing list for lwIP users
Subject: RE: [lwip-users] Lock-up issue with tcp_receive() and tcp_output()

On Thu, 2011-01-13 at 08:37 +0000, Carr, Anthony wrote:
> I understand it is better to prevent the issue occurring but is there
> any way to recover from this condition.

No, sorry - once corrupted it's impossible to recover.

Kieran


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