Date: Thu, 6 Jun 2002 22:32:03 -0600 From: "Mike Roest" <bsd-lists@blahz.ab.ca> To: "'BSD Freak'" <bsd-freak@mbox.com.au>, "'FreeBSD Questions'" <freebsd-questions@FreeBSD.ORG> Subject: RE: Converting decimal dotted subnet mask to CIDR in a script Message-ID: <000001c20ddc$4916c370$465d4018@zeus> In-Reply-To: <f9079af91739.f91739f9079a@mbox.com.au>
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You can 1)split each of the octects at the decimals. 2)convert each resulting numbers to binary 3)count the number of ones in the 4 binary numbers. 4)bang you have the result. This procedure "should" work for all subnet masks -Mike -----Original Message----- From: owner-freebsd-questions@FreeBSD.ORG [mailto:owner-freebsd-questions@FreeBSD.ORG] On Behalf Of BSD Freak Sent: Thursday, June 06, 2002 10:05 PM To: FreeBSD Questions Subject: Converting decimal dotted subnet mask to CIDR in a script Hi all, I have a variable in a script we use $MASK=255.255.255.0 Is there a utility or an easy way to process $MASK and get $MASKCIDR=24 the CIDR value of 255.255.255.0 Many thanks... --------------------------------------------------------------------- Faxes delivered directly to any email address, new to mBox! Find out more http://www.mbox.com.au/fax To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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