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

[Tom C. Barker]

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?
(We return always with a NULL.)

Thanks,
Tom

/* could not find the destination Ethernet address in ARP cache? */
if (dest == NULL) {
/* ARP query for the IP address, submit this IP packet for queueing */
/* TODO: How do we handle netif->ipaddr == ipaddr? */
etharp_query(netif, ipaddr, q);
/* { packet was queued (ERR_OK), or discarded } */
/* return nothing */
return NULL;