netdev - Re: [PATCH] iproute2: support xfrm upper protocol gre key

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Message-ID: <4CEC0A42.60209@iki.fi>
Date:	Tue, 23 Nov 2010 20:38:58 +0200
From:	Timo Teräs <timo.teras@....fi>
To:	Stephen Hemminger <shemminger@...ux-foundation.org>
CC:	netdev@...r.kernel.org
Subject: Re: [PATCH] iproute2: support xfrm upper protocol gre key

On 11/23/2010 08:13 PM, Stephen Hemminger wrote:
> On Tue, 23 Nov 2010 18:44:44 +0200
> Timo Teräs <timo.teras@....fi> wrote:
>> On 11/23/2010 06:24 PM, Stephen Hemminger wrote:
>>> The GRE key is not really an IPv4 address. Why should the utilities
>>> use IPv4 address manipulation to format/scan it.  It makes more sense
>>> to me to just use u32 an do the necessary ntohl.
>>
>> This is pretty much how iptunnel.c does it, so I copied the code. Would
>> you prefer to format it as single u32 number? Or use something else for
>> formatting it similar to IPv4?
>>
>> In either case, we should change iptunnel.c to match ipxfrm.c. It'll be
>> easier if both parts handling the gre key treat it equivalently.
>>
>> I think Cisco does indeed treat it as u32 number in the configurations.
>> So I'm okay updating this patch, and fixing iptunnel.c side too. We
>> might still want to keep the parsing of ipv4 format to keep backwards
>> compatibility.
> 
> My preference would be to take both dotted quad and a single
> number.

And I assume that when dumping stuff, it should be output as single
number. Or make that configurable with some switch?

I'll refresh my patch and fix iptunnel.c output tomorrow.
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