Subject: Re: arp warning message
To: Ignatios Souvatzis <firstname.lastname@example.org>
From: Andrew Brown <email@example.com>
Date: 08/18/2000 11:37:37
>> so...if i send a reply to my machine at 220.127.116.11 from 18.104.22.168,
>> it should get a warning printed, yesh?
>I'm not sure I fully made me understood.
>ARP packets aren't IP packets. They don't have IP src and destination.
yes, that i know. they're
[ethernet header with arp type code]
[arp link type, ethernet=0x0001]
[arp upper layer, ip=0x0800]
[link address length, ethernet=0x06]
[upper layer address length, ip=0x04]
[arp type query=0x0001, reply=0x0002]
and then a pair of ethernet and ip address combinations. for
requests, the second ethernet address is usually all ones or all
>If you send an ARP packet
>- from any MAC address to the MAC address of 22.214.171.124,
>- a reply claiming that 126.96.36.199 is at another MAC address
>(at the same time claiming that 188.8.131.52 is at its own MAC address, in
> the requestor field of the ARP packet; I'm not sure what happens if you
> use a 4th machines data there)
that's what i was trying...
>the message should be seen.
...but it seems, upon inspection, that arplookup() is not being called
with create set, so the message is not printed. on to dig deeper...
>(This is a fine, but necessary distinction.)
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