RE: [lwip-users] Syncronise netif_remove() with tcpip_thread

[Cassius]

Dear Christoph,

        I believe that this is the only way. In your example, did you
close all the sockets?


Cassius Resende Duarte
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-----Original Message-----
From: address@hidden
[mailto:address@hidden On Behalf Of
Christoph Bartelmus
Sent: segunda-feira, 1 de dezembro de 2003 06:23
To: address@hidden
Subject: Re: [lwip-users] Syncronise netif_remove() with tcpip_thread


Hi,

on 28 Nov 03 address@hidden wrote:
[...]
>       See in netif.c the function netif_remove(struct netif * netif).
This 
> function will remove the interface from the interface list.

Cassius, thanks for your answer.
Sorry, if I didn't make it clear enough in my previous mail, but my  
problem is that netif_remove() is racy. Have I overlooked something?

Here my problem again:

> I'm trying to port lwip to an embedded system. The net interface is 
> running in its own thread. When I want to remove the interface, how 
> can I make sure that tcpip_tread does not try to access the data 
> structures just freed by netif_remove()?

> I can reproduce a case where tcpip_thread tries sending a packet 
> although the net interface has been just removed, causing havoc.
[...]

Christoph


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