"Martin v. Löwis" martin at v.loewis.de
Sat Sep 26 19:44:45 CEST 2009

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>  - Masks are also 32- (128-) bit integers, which happen to have the
>    property that their leftmost N bits are all zero and the rest are all
>    one.

As a side note, I would be in favor of dropping the concept of a mask
from the library, and only support a prefix length.

IPv6 doesn't support masks at all, and even for IPv4, I think there are
conventions (if not RFCs) against using them in a way that does not
correspond to a prefix length.

Regards,
Martin

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