RE: [lwip-users] arp reply, no ping

[Chris Hiszpanski]

I found and fixed the problem that I earlier reported.

After setting my ethernet interface as the default interface with 
netif_set_default(ethif), I apparently needed to bring it up with 
netif_set_up(ethif). This was not done in the 
contrib/ports/unix/minimal/main.c code. Is this code outdated?

Cheers,
Chris

> Pinging LwIP, an ARP reply is sent from LwIP with the correct hardware 
> address and ip address. However, ping replies are not sent by LwIP.
>
> tcp_tmr() is called every 100ms.
>
> Setting a breakpoint at ip_input, I verified that incoming packets are 
> being copied from the CS8900A.
>
> Setting a breakpoint in ipv4/ip.c at line 270 (inside ``if (netif == NULL) 
> { ...'') to check if a matching network interface was found for the 
> received packet, I find that the breakpoint is reached -- no network 
> interface matches my incoming ping packets.
>
> I have added the network interface with netif_add and set it as the default 
> with netif_set_default.
>
> Any ideas as to why LwIP is not replying to pings?

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