Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.1 6/24/83; site oddjob.UChicago.UUCP Path: utzoo!watmath!clyde!floyd!vax135!houxz!houxm!ihnp4!oddjob!matt From: matt@oddjob.UChicago.UUCP (Matt Crawford) 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: Thu, 21-Jun-84 08:10:43 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