Re: [lwip-users] Etharp drops packets for unlisted arp entries

[Leon Woestenberg]

Hello Tom,

Tom C. Barker wrote:

> My dns queries get dropped if the address is not in the arp table.
>
>    /* { packet was queued (ERR_OK), or discarded } */
>
> Does the stack allow any knowledge that this has happened?
>  
The code in CVS does, 0.7.x does not and will not as we will not break 
the API
within the stable (0.7) branch.

> (We return always with a NULL.)
>
>  
That's 0.7.x etharp_output() I assume.
This has changed for the better in CVS HEAD, which has a change in API:

err_t
etharp_output(struct netif *netif, struct ip_addr *ipaddr, struct pbuf *q)
{

.....

   /* queue on destination Ethernet address belonging to ipaddr */
   return etharp_query(netif, ipaddr, q);
 }


Regards,

Leon.