Reversed MAC lookup inside FreeBSD kernel?

[Khoa A. To]

Hi,

I'm new to kernel code, and don't understand the structure of ARP table very
well.  Could someone please point me to the right direction for the
following problem I have:

I need to get a translation of MAC addresses to IP addresses in the kernel.
I saw some postings about how to translate MAC to IP in the user level, but
they seem to require the host to send a packet to that MAC address and some
other ways that also require the host to actually send some request packets
out.  All my MAC-IP addresses are already set statically using "arp -s" in
the ARP table.  When I'm in the kernel, how do I get a hold of the ARP table
and do some kind of reversed search to get the IP address out?

Thank you very much,
Khoa.