From: | darcy(at)druid(dot)net (D'Arcy J(dot)M(dot) Cain) |
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To: | maillist(at)candle(dot)pha(dot)pa(dot)us (Bruce Momjian) |
Cc: | pgsql-hackers(at)postgreSQL(dot)org |
Subject: | Re: [HACKERS] CIDR type and functions |
Date: | 1998-10-09 18:16:09 |
Message-ID: | m0zRh5F-0000exC@druid.net |
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Lists: | pgsql-hackers |
Thus spake Bruce Momjian
> Check \df and \fo. There is a >> and << operators that do subnet
> testing.
[I assume you meant \do]
Cool. I checked out what other functions as well. I don't see a couple
that were discussed early on though. Specifically, how about functions
to extract the host, the network or the netmask from an address?
Here are the functions I had suggested.
netmask('192.3.4.5/24::cidr') == 255.255.255.0
masklen('192.3.4.5/24::cidr') == 24
host('192.3.4.5/24::cidr') == 192.3.4.5
network('192.3.4.5/24::cidr') == 192.3.4.0
and perhaps;
class('192.3.4.5/24::cidr') == C
classnet('192.3.4.5/24::cidr') == 192.3.4
Can I help code up some of this stuff?
--
D'Arcy J.M. Cain <darcy(at){druid|vex}.net> | Democracy is three wolves
http://www.druid.net/darcy/ | and a sheep voting on
+1 416 424 2871 (DoD#0082) (eNTP) | what's for dinner.
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