From mboxrd@z Thu Jan  1 00:00:00 1970
From: Joe Perches <joe@perches.com>
Subject: Re: pktgen IP address stepping
Date: Thu, 16 Dec 2010 11:18:52 -0800
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Cc: "David S. Miller" <davem@davemloft.net>, netdev@vger.kernel.org
To: Kristian Larsson <kristian@spritelink.net>
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On Thu, 2010-12-16 at 19:30 +0100, Kristian Larsson wrote:
> > I suggest using actual ipv4 addresses (and ipv6 if you ever
> > need it) as increment/mask.
> Not sure I follow you, should the stepping be specified as
> 0.0.0.213 if I would like to increase with 213 or 0.0.255.255 if
> I want to increase by a /16 at a time?

More like:

Initial IPv4 address:	0.0.0.1
Step:			0.1.0.0
Mask:			127.0.0.1

addr = (addr + step) & mask;

Cycles through all /16's below 128