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Re: [Hipsec] Selection of LSI address block

"Ahrenholz, Jeffrey M" <jeffrey.m.ahrenholz@boeing.com> Wed, 19 August 2009 22:25 UTC

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Date: Wed, 19 Aug 2009 15:24:37 -0700
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Thread-Topic: [Hipsec] Selection of LSI address block
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From: "Ahrenholz, Jeffrey M" <jeffrey.m.ahrenholz@boeing.com>
To: Robert Moskowitz <rgm@htt-consult.com>, hipsec@ietf.org
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Subject: Re: [Hipsec] Selection of LSI address block
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> We have discussed using 127.0.0.0 for LSIs, say 
> 127.100.0.0/16, but will 
> that really work?

in the OpenHIP software we have a macro IN_LOOP() to check if an IPv4
address is equal to 
(INADDR_LOOPBACK >> IN_CLASSA_NSHIFT), i.e. if the top bits equal 127
(see /usr/include/netinet/in.h on Linux)

I wonder if other applications use similar techniques to check for
loopback addresses? Using 127.100.0.0/16 would be problematic in that
case.

-Jeff

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