Re: [lwip-users]lwip and DHCP

[address@hidden]

Bob Brusa wrote:
> Hence the problem is not the chksum, but somewhere there is a loss of
> data. Now I am trying to find out where the true contents of the pubs gets
> lost. Unfortunately I also am lost: The internal working of the lwip-stack
> is not easy to grasp. Best thing would be if someone already has a fix for
> the problem. Or good advice on how to takle the issue. Thanks for help
>    
It seems like the netif driver only copies the contents of the first 
pbuf. I don't know which board/driver you are using or where you got it 
from (or whether you wrote it yourself), but the netif driver is 
certainly the place to start looking. You should find it pretty easy by 
searching for the place where a) pbuf_alloc() gets called by the netif 
driver and b) the ->input() function gets called. Somewhere in between 
that, pbufs are filled by copying from the MAC buffers.

Simon