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From: matt@oddjob.UChicago.UUCP
Newsgroups: net.lan,net.unix-wizards
Subject: internet broadcast addresses
Message-ID: <300@oddjob.UCHICAGO.UUCP>
Date: Wed, 20-Jun-84 17:30:06 EDT
Article-I.D.: oddjob.300
Posted: Wed Jun 20 17:30:06 1984
Date-Received: Sat, 23-Jun-84 23:43:37 EDT
Followup-To: net.lan
Organization: U. Chicago: Astronomy & Astrophysics
Lines: 12

I understand that NIC is recommending the use of all 1 bits in the host
portion of an internet address to denote a broadcast datagram.  (That is
the low order 24, 16 or 8 bits depending on whether the network is class
A, B, or C.)  Unix 4.2bsd uses all zero instead of all one bits for that
purpose, and to convert would take more than a simple redefinition of the
constant INADDR_ANY because of the variable length of the hosts field.

Has anybody had a clash of software incompatibilty over this point?  I am
expecting to run into the problem soon at this university.
___________________________________________________________
Matt		University	ARPA: crawford@anl-mcs.arpa
Crawford	of Chicago	UUCP: ihnp4!oddjob!matt