Re: [lwip-devel] Re: generate a broadcast answer...

[address@hidden]

Piero 74 wrote:
> ...i'm thinking:
>
> after a first arp request from pc (ping or tcp connect) i will have a
> couple ip-macAddress in my arp table.
> can i force a refresh in
> some way?
>   
If you *know* the IP address of the PC, you could use etharp_request() 
which directly sends an ARP request. You can also use that to re-request 
the addresses in the ARP table. If you put that code into etharp_tmr 
(with a counter per entry), you have a periodic refresh of the whole table.

Only one question: why would you need that? If you set ARP_MAXAGE low 
enough, arp entries automatically get invalidated after a timeout and 
will be re-requested if reused.

Simon