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Date:	Sat, 10 Nov 2007 10:44:17 +0900 (JST)
From:	YOSHIFUJI Hideaki / 吉藤英明 
	<yoshfuji@...ux-ipv6.org>
To:	osprey67@...oo.com
Cc:	netdev@...r.kernel.org, yoshfuji@...ux-ipv6.org
Subject: Re: [PATCH 05/05] ipv6: RFC4214 Support (3)

In article <4734FCEF.3080301@...oo.com> (at Fri, 09 Nov 2007 16:35:59 -0800), osprey67 <osprey67@...oo.com> says:

> --- linux-2.6.24-rc2/include/linux/if_tunnel.h.orig	2007-11-09 09:06:16.000000000 -0800
> +++ linux-2.6.24-rc2/include/linux/if_tunnel.h	2007-11-09 15:49:54.000000000 -0800
> @@ -25,6 +25,8 @@ struct ip_tunnel_parm
>  	__be16			o_flags;
>  	__be32			i_key;
>  	__be32			o_key;
> +	__be32			router;
> +	__be32			lifetime;
>  	struct iphdr		iph;
>  };
>  

No, you cannot simply change this.
If you change ioctl structure, you need to change
constants for SIOC{GET,ADD,CHG,DEL}TUNNEL.
Rename ole ones to OSIOxxx and assign new values.

If possible, new iproute2 should work with old kernels, and
old iproute2 should work with new kernels (without new features).

--yoshfuji
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