interger to I P address

Darden, Patrick S. darden at
Wed Aug 27 12:31:50 CDT 2008

Somebody's going to bring in Emacs now.  Then somebody else will claim VI can do it faster and using less memory....

Argh.  ;-)

-----Original Message-----
From: Joe Greco [mailto:jgreco at]
Sent: Wednesday, August 27, 2008 1:29 PM
To: chartley at
Cc: nanog at
Subject: Re: interger to I P address

> bash# iptoint(){ oct1=`echo $1|awk -F\. '{print $1}'`; oct2=`echo $1|awk -F\. '{print $2}'`; oct3=`echo $1|awk -F\. '{print $3}'`; oct4=`echo $1|awk -F\. '{print $4}'`; echo $[($oct1<<24)+($oct2<<16 )+($oct3<<8)+$oct4 ];}
> bash# inttoip(){ echo $[$1>>24].$[($1>>16)&255].$[($1>>8)&255].$[$1&255]; }
> bash# inttoip 1089055123

BASH?  Hahaha.  Real Admins use sh.  More portable(*).

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