nanog mailing list archives
Re: APNIC Allocated 14/8, 223/8 today
From: Vincent Hoffman <jhary () unsane co uk>
Date: Wed, 14 Apr 2010 15:35:28 +0100
On 14/04/2010 13:45, Dave Hart wrote:
On Wed, Apr 14, 2010 at 09:20 UTC, Nick Hilliard wrote:On 14/04/2010 08:06, Srinivas Chendi <sunny () apnic net> wrote to SANOG:014/8 223/8Sunny, Please be careful about how you write this. "014" is formally an octal representation, and what you've written there actually means that APNIC has received 12/8 (= octal 014). NickNick, My eyebrow raised at the leading zero as well, but I'd call it ambiguous. 0x14 is unambiguously decimal 20, but 014 is only unambiguous in a context that defines leading zero as implying octal. For a C program relying on the runtime to convert text to numeric representation, it depends. sscanf("%d", &myint) will convert 014 to decimal 14, "%i" gets decimal 12. I personally hunt down and kill %i and other octal-assuming code when I see it, except where octal is conventional. To my eyes, 0xFF (or FF) screams "all bits lit" while 0377 (or 377) only hesitantly clears its throat. Moreover, I assume computers will be used by people who have never had reason to believe a leading zero implies base 8, and I find no joy in forcing them to learn that quirk of computing history.
On an up to date OSX install (and Centos linux and FreeBSD) (15:23:17 <~>) 0 $ ping 014.0.0.1 PING 014.0.0.1 (12.0.0.1): 56 data bytes Request timeout for icmp_seq 0
From windows 2003 servert
C:\Documents and Settings\Administrator>ping 014.0.0.01 Pinging 12.0.0.1 with 32 bytes of data: wget (on linux and freebsd) (15:26:02 <~>) 0 $ wget 014.0.0.1 --2010-04-14 15:26:06-- http://014.0.0.1/ Connecting to 014.0.0.1|12.0.0.1|:80... Oddly on OSX it doesnt take it as octal (15:27:30 <~>) 130 $ wget 014.0.0.1 --2010-04-14 15:27:31-- http://014.0.0.1/ Connecting to 014.0.0.1 (014.0.0.1)|14.0.0.1|:80... When it comes to IP addresses, its not history, its important :) Vince
Take care, Dave Hart
Current thread:
- APNIC Allocated 14/8, 223/8 today Skeeve Stevens (Apr 14)
- Re: APNIC Allocated 14/8, 223/8 today Stephane Bortzmeyer (Apr 14)
- Re: APNIC Allocated 14/8, 223/8 today Nick Hilliard (Apr 14)
- Re: APNIC Allocated 14/8, 223/8 today Dave Hart (Apr 14)
- Re: APNIC Allocated 14/8, 223/8 today Joe Abley (Apr 14)
- Re: APNIC Allocated 14/8, 223/8 today Thomas Habets (Apr 14)
- Re: APNIC Allocated 14/8, 223/8 today Vincent Hoffman (Apr 14)
- Re: APNIC Allocated 14/8, 223/8 today Larry Sheldon (Apr 14)
- Re: APNIC Allocated 14/8, 223/8 today Dave Hart (Apr 14)
- Re: APNIC Allocated 14/8, 223/8 today Neil Harris (Apr 14)
- Re: APNIC Allocated 14/8, 223/8 today Nick Hilliard (Apr 14)
- Re: APNIC Allocated 14/8, 223/8 today Stephane Bortzmeyer (Apr 14)