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RE: [lwip-users] Problem with long term running of lwIP.
From: |
Goldschmidt Simon |
Subject: |
RE: [lwip-users] Problem with long term running of lwIP. |
Date: |
Fri, 29 Feb 2008 12:34:40 +0100 |
> Another possible cause (I have seen this) is that after the ARP entry
expired,
> and the client sends the pbuf chained, got queued in ARP layer, an ARP
request
> is sent. As soon the polling thread gets the ARP REPLY, it then
updates the
> table and try to send the queued data (in the thread itself).
> The problem was, my low_level_output was not protected, hence the
chances are
> there that both tcpip thread (sending a TCP packet)and the polling
thread access
> low_level_output simulataneously and corrupted the index of my
Ethernet buffer
> descriptor. The TCP was retransmitted as it should, but the UDP data
was lost, hence the echo stopped.
I guess this is fixed with lwIP 1.3.0 (if you adopt your drivers):
The ARP layer is now called from within the tcpip_thread by setting
netif->input
to ethernet_input() instead of ip_input(). Resultingly, your driver
should not
call the ARP functions directly in your ethernetif_input function.
This was a design error in lwIP multithreading.
Simon.
- [lwip-users] Problem with long term running of lwIP., Taranowski, Thomas (SWCOE), 2008/02/27
- RE: [lwip-users] Problem with long term running of lwIP., Pettinato, Jim, 2008/02/27
- Re: [lwip-users] Problem with long term running of lwIP., Caglar Akyuz, 2008/02/27
- RE: [lwip-users] Problem with long term running of lwIP., Taranowski, Thomas (SWCOE), 2008/02/27
- RE: [lwip-users] Problem with long term running of lwIP., Kieran Mansley, 2008/02/29
- RE: [lwip-users] Problem with long term running of lwIP., Muhamad Ikhwan Ismail, 2008/02/29
- RE: [lwip-users] Problem with long term running of lwIP.,
Goldschmidt Simon <=
- RE: [lwip-users] Problem with long term running of lwIP., Muhamad Ikhwan Ismail, 2008/02/29
- RE: [lwip-users] Problem with long term running of lwIP., Taranowski, Thomas (SWCOE), 2008/02/29
- RE: [lwip-users] Problem with long term running of lwIP., Pettinato, Jim, 2008/02/29