Date: Sat, 12 Aug 1995 02:51:49 -0700 (PDT) From: "Rodney W. Grimes" <rgrimes@gndrsh.aac.dev.com> To: jkh@freefall.FreeBSD.org (Jordan K. Hubbard) Cc: freebsd-bugs@freebsd.org, joerg_wunsch@uriah.heep.sax.de Subject: Re: 950726-SNAP lp0/nfs install bug ? Message-ID: <199508120951.CAA05606@gndrsh.aac.dev.com> In-Reply-To: <8860.808173419@freefall.FreeBSD.org> from "Jordan K. Hubbard" at Aug 11, 95 01:36:59 pm
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> > > Jordan, speaking at this part of the installation, it would be nice to > > either pre-allocate the netmask field with the proper default netmask > > (similar to the `domain') or omit the `netmask' keyword from the > > ifconfig command line if no netmask has been provided. Otherwise, > > Yeek! I thought I did! I will look at the code.. > > Hmmm. Anyone willing to give me a little formula to calculate > netmask based on IP address? Then I could also fill it in.. :-) See the ifconfig code that does this now based upon the class of network address. It is rather simply. For inet address with the high order 2 bits 0 the standard class A netmask of 0xff00000000 applies, for inet address starting 10 a class B netmask of 0xffff0000 applies, and finally for an inet address starting 11 a class C netmask of 0xffffff00 applies. -- Rod Grimes rgrimes@gndrsh.aac.dev.com Accurate Automation Company Reliable computers for FreeBSD
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