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Date: Fri, 21 Dec 2012 19:39:54 +0100 From: Stephan Gatzka <stephan.gatzka@...il.com> To: YOSHIFUJI Hideaki <yoshfuji@...ux-ipv6.org> CC: netdev@...r.kernel.org, linux1394-devel@...ts.sourceforge.net Subject: Re: IPv6 over Firewire > If you are talking about how to build NS/NA/RS/Redirect messages, you > can just use ndisc_opt_addr_space() and ndisc_fill_addr_option() here. Thanks, these functions are certainly helpful. But ndisc_opt_addr_space() calculates the required space from dev->addr_len and ndisc_addr_option_pad(dev->type). The latter is 0 for IEEE1394 (firewire). So the required option space just comes from dev->addr_len, which is 8 for firewire, resulting in an option address space of 16 (2 octets). But rfc3146 requires an option address space of 3 octets. So my main question is if in such a situation the best is to reserve additional skb tail room using needed_tailroom in struct netdevice. This directly affects the memory allocated in ndisc_build_skb(). Regards, Stephan -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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