netdev - Re: pktgen IP address stepping

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Date:	Thu, 16 Dec 2010 11:18:52 -0800
From:	Joe Perches <joe@...ches.com>
To:	Kristian Larsson <kristian@...itelink.net>
Cc:	"David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org
Subject: Re: pktgen IP address stepping

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



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