[lwip-devel] [task #6827] etharp could need some tuning

[Simon Goldschmidt]

Follow-up Comment #22, task #6827 (project lwip):

To minimize breaking the abstraction, we could add a pointer (u8_t pointer or
to be more general, a void** which would mean having a void* member in the
pcbs) 'addr_hint' that can be filled by the netif->output() or
etharp_output() function, or whatever is behind netif->output(). 'addr_hint'
would have to be passed through the IP layer and the netif down to the arp
layer which could fill it. Protocols not needing this (e.g. icmp) would
simply pass a null pointer.

Another thing to 'tune': etharp_output() has the same parameters as
netif->output(), only in another order. If we make it the same order,
ethernetif_init can directly set netif->output() to etharp_output() to save a
function call.

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