netdev - Re: pktgen IP address stepping

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Message-ID: <20101216203430.GE8404@spritelink.se>
Date:	Thu, 16 Dec 2010 21:34:30 +0100
From:	Kristian Larsson <kristian@...itelink.net>
To:	Joe Perches <joe@...ches.com>
Cc:	"David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org
Subject: Re: pktgen IP address stepping

On Thu, Dec 16, 2010 at 11:18:52AM -0800, Joe Perches wrote:
> 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

Which I guess is doable with the patch using these options;
(dst|src)_min 0.0.0.1
(dst|src)_max 128.0.0.0
(dst|src)_step 65535

but you want (dst|src)_step to be specified using dot-quad
instead of an integer?

   Kristian.

-- 
Kristian Larsson                                        KLL-RIPE
+46 704 264511			              kll@...itelink.net
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