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

[Piero 74]

bill,
i want to say, that my board is a device for security. we have to
garantee communication path always,  so, if no packets are captured in
low level driver, the code will be try to recovery, resetting dma
engine and phy chip, and after some attempts, reset the whole board.

piero

2009/3/9, Bill Auerbach <address@hidden>:
> Piero,
>
>
>
> Mostly out of curiosity, what security issue is prevented or improved by
> resetting after 30 seconds of inactivity?
>
>
>
> There will always be security problems (notably someone spoofing your
> device) that you cannot do anything to improve security on or prevent.
>
>
>
> Bill
>
>
>
> From: address@hidden
> [mailto:address@hidden On Behalf
> Of Piero 74
> Sent: Monday, March 09, 2009 11:28 AM
> To: lwip-devel
> Subject: [lwip-devel] generate a broadcast answer...
>
>
>
> Hi all.
>
> For security reasons, i have to be sure that no trouble is present in
> ethernet HW in my board.
> In my driver (loop in ethernetif.c), if i don't receive packets for 30
> seconds i will reset the lowlevel driver.
> Normally, if the board is connected to a switch, always there are broadcast
> packets from other devices on LAN, so reset doesn't occur.
> But if i have a board connected directly to a pc (for example a laptop),
> there is no traffic.
>
> I want to force a packet answer from a pc...
> How i can send a packet which force pc stack to send back a broadcast packet
> (arp for example)?
> Any idea?
>
> Thanks
> Piero
>
>