From: "Russ Cox" <rsc@swtch.com>
To: "Fans of the OS Plan 9 from Bell Labs" <9fans@cse.psu.edu>
Subject: Re: [9fans] Re: ip(2) man page: return code of parseip() and parsemaskip()
Date: Fri, 20 Oct 2006 10:38:42 -0400 [thread overview]
Message-ID: <ee9e417a0610200738p6647462bqb8b808d5c9c954@mail.gmail.com> (raw)
In-Reply-To: <3281345f7d653afc3e8f3317d7a0bfed@coraid.com>
> but i think it's silly to differentiate between 192.168.0.1 and
> ::ffff:192.168.0.1 an ip6 address. that's like a c compiler declaring
> 0x3 != 3.
No, it's not. It's like if atoi, in addition to returning
the actual value, also returned the base the number
was written in. Most callers wouldn't care, but some
might.
Most people calling parseip shouldn't care what
format the address was in, and should use *to
as the address. The only interesting question
that should ever be asked of the return value is whether
or not it is equal to 6. In particular, code that uses
ip = parseip(to, from);
and then goes on to use ip as an IP address
is wrong and needs to be rewritten, not catered to.
Russ
next prev parent reply other threads:[~2006-10-20 14:38 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-10-20 9:04 [9fans] " Gabriel Diaz
2006-10-20 9:48 ` [9fans] " Gabriel Diaz
2006-10-20 12:56 ` erik quanstrom
2006-10-20 13:44 ` Russ Cox
2006-10-20 13:56 ` erik quanstrom
2006-10-20 14:38 ` Russ Cox [this message]
2006-10-20 15:20 ` erik quanstrom
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