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dnsmasq

Hello,

For some specific application I needed to deny access to a MAC address
to a lease. For this reason I modified the dhcp-script behavior and is
called with an extra parameter "access" once a dhcp request or discover
is received. In that case if the exit code of the script is zero,
dnsmasq continues normally, and if non-zero the packet is ignored.

This was not added as a security feature but as a mean to handle
differently some addresses. It is also quite intrusive since it requires
changes in several other subsystems.

It attach the patch in case someone is interested.

regards,
Nikos

nmav@gennetsa.com