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Date:	Wed, 15 Oct 2008 17:07:10 +0100
From:	Ben Hutchings <>
To:	Krzysztof Halasa <>
Cc:	Herbert Xu <>,
	Stephen Hemminger <>,
	Krzysztof Oledzki <>,
Subject: Re: Error: an inet prefix is expected rather than "0/0".

On Wed, 2008-10-15 at 17:35 +0200, Krzysztof Halasa wrote:
> Herbert Xu <> writes:
> > How about just keeping Alexey's code? POSIX doesn't restrict
> > the IP address format command utilities should accept.  So to
> > me is a perfectly acceptable interpretation of the
> > partial address 127.2.
> Then it would be better to disallow such things. The normal meaning
> for "127.2" was always, and it was widely documented and
> used (though perhaps in RFCs, not in POSIX).

It's a Berkeley extension which spread via BSD and its inet_aton()
function.  I don't believe it's specified in any RFC.

> Some people use "10.1" syntax all the time.
> > This also has the benefit of not breaking any existing scripts
> > that already work.  The scripts which are broken will remain
> > broken which doesn't surprise anyone.
> Any script which uses 127.2 to mean is IMHO broken, though
> I have never seen anything like that.
> Rules always have been simple:
> 10	-
> 10.1	-
> 10.1.2	-

No, a single number is treated by inet_aton() as a 32-bit address, so 10
is equivalent to

> If it can't stay this way, lets remove this shortened notation
> completely.


Ben Hutchings, Senior Software Engineer, Solarflare Communications
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.

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