From: Stephen Hemminger <shemminger@linu...>
Date: Wed, 28 Feb 2007 23:04:36 -0800

> If an normal application has to use something like raw packet
> filtering, it seems there is a missing API.

I'm loosely following this discussion, but Ben mentions DHCP
and I remember learning the other month that DHCP uses AF_PACKET
and filtering instead of IP RAW sockets because it needs to get
the MAC address and RAW sockets don't provide that.
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