The short of it is that if a tx packet is < 64 bytes (min ethernet frame
len), data can be leaked if the driver transmits 64 bytes.  It seems our
use of mbufs would prevent leakage but I haven't examined any drivers to
verify this.

http://www.atstake.com/research/advisories/2003/atstake_etherleak_report.pdf

-Nate


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