netdev - Re: [PATCH][RESEND] IPv6: 6rd tunnel mode

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Message-ID: <4AB838F1.1090704@hp.com>
Date:	Mon, 21 Sep 2009 22:39:45 -0400
From:	Brian Haley <brian.haley@...com>
To:	Alexandre Cassen <acassen@...ebox.fr>
CC:	netdev@...r.kernel.org
Subject: Re: [PATCH][RESEND] IPv6: 6rd tunnel mode

Hi Alexandre,

Alexandre Cassen wrote:
> This patch add support to 6rd tunnel mode currently targetting
> standard track at the IETF.
> 
> IPv6 rapid deployment (RFC5569) builds upon mechanisms of 6to4 (RFC3056)
> to enable a service provider to rapidly deploy IPv6 unicast service
> to IPv4 sites to which it provides customer premise equipment.  Like
> 6to4, it utilizes stateless IPv6 in IPv4 encapsulation in order to
> transit IPv4-only network infrastructure. Unlike 6to4, a 6rd service
> provider uses an IPv6 prefix of its own in place of the fixed 6to4
> prefix.

I couldn't find RFC 5569 (delayed due to IPR rights?), although I did find
the latest 6rd draft, -03.  It was showing as Informational, not Standards
track, is that right?  Just curious.

> +		case SIOCADD6RD:
> +		case SIOCCHG6RD:
> +			if (ip6rd.prefixlen >= 95) {
> +				err = -EINVAL;
> +				goto done;
> +			}
> +			t->ip6rd_prefix.addr = ip6rd.addr;

ipv6_addr_copy(&t->ip6rd_prefix.addr, &ip6rd.addr); is the preferred way to
copy the address.

-Brian
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