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SubjectRe: [patch] 2.4 version of my duplicate IP and MAC detection patch

You've made the foo-address to ascii string routines non-reentrant.
The hbuffer[] was on the local stack for a very good reason.

Why can't you write a userspace daemon that listens on one of the
lower level raw'ish sockets for arp packets and do the same checks

I don't like this change at all, I think it can be done completely
in user space. The existence of a working tcpdump is proof of this
fact. :-) Whether it can be done efficiently is another issue.

Making it possible to do this efficiently would be the kernel change
which might result from your work on a userspace variant, so have at

Even failing that, I would prefer something like a special "arp
netlink socket" which would allow a privileged userspace program
to hear all arp traffic the machine can hear.

David S. Miller
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