Repository : ssh://git@open-mesh.org/batctl

On branch : master

commit fc98f2cb4b061b09323e1b7473c33227e07a1368 Author: Linus Lüssing linus.luessing@web.de Date: Sat Feb 15 17:47:53 2014 +0100

batctl: Add IPv4 link-local/IPv6-ll-all-nodes multicast support

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 Signed-off-by: Marek Lindner mareklindner@neomailbox.ch

fc98f2cb4b061b09323e1b7473c33227e07a1368 packet.h | 9 +++++++++ 1 file changed, 9 insertions(+)

diff --git a/packet.h b/packet.h index e8c483d..0aada24 100644 --- a/packet.h +++ b/packet.h @@ -89,6 +89,15 @@ enum batadv_icmp_packettype { BATADV_PARAMETER_PROBLEM = 12, };

+/** + * enum batadv_mcast_flags - flags for multicast capabilities and settings + * @BATADV_MCAST_WANT_ALL_UNSNOOPABLES: we want all packets destined for + * 224.0.0.0/24 or ff02::1 + */ +enum batadv_mcast_flags { + BATADV_MCAST_WANT_ALL_UNSNOOPABLES = BIT(0), +}; + /* tt data subtypes */ #define BATADV_TT_DATA_TYPE_MASK 0x0F