Re: [B.A.T.M.A.N.] [PATCHv14 5/6] batman-adv: Add IPv4 link-local/IPv6-ll-all-nodes multicast support

Marek Lindner
2014-02-16T06:30:38Z

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On Saturday 15 February 2014 17:47:53 Linus Lüssing wrote:
> With this patch a node may additionally perform the dropping or
> unicasting behaviour for a link-local IPv4 and link-local-all-nodes
> IPv6 multicast packet, too.
>
> The extra counter and BATADV_MCAST_WANT_ALL_UNSNOOPABLES flag is needed
> because with a future bridge snooping support integration a node with a
> bridge on top of its soft interface is not able to reliably detect its
> multicast listeners for IPv4 link-local and the IPv6
> link-local-all-nodes addresses anymore (see RFC4541, section 2.1.2.2
> and section 3).
>
> Even though this new flag does make "no difference" now, it'll ensure
> a seamless integration of multicast bridge support without needing to
> break compatibility later.
>
> Also note, that even with multicast bridge support it won't be possible
> to optimize 224.0.0.x and ff02::1 towards nodes with bridges, they will
> always receive these ranges.
>
> Signed-off-by: Linus Lüssing <linus.luessing@web.de>
> ---
> main.c | 6 +++
> main.h | 1 +
> multicast.c | 135
> ++++++++++++++++++++++++++++++++++++++++++++++++++----
> packet.h | 9 ++++
> soft-interface.c | 1 +
> types.h | 12 +++++
> 6 files changed, 156 insertions(+), 8 deletions(-)

Applied in revision 1c09034.

Thanks,
Marek

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