Re: [lwip-users] parameter for netif_add in UDP

[Jonathan Larmour]

Ben Bobbitt wrote:
> 
> Yes, the DHCP part seems to be working. I see the transactions on the
> wire and my app is able to retrieve the new IP address.  I am also able
> to transmit UDP packets. 
> 
> I've seen a couple of flavors of the receive issue.  In one situation
> the transmitting system sends out the ARP packet looking for the proper
> device to associate with that IP, and the ARP module in lwIP doesn't
> seem to recognize that it is directed to him.  It seems that in other
> instances ( using a different transmitting system ), there is no ARP
> request preceding the transmit, and that's when my system responds with
> the ICMP port unreachable.  Both symptoms would still seem to point to
> some setup problem with the netif. 

You could enable ETHARP_DEBUG in lwipopts.h (and '#define LWIP_DEBUG 1' in
your port) to see if that gives more info on what is going on.

Jifl
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