• Linus Lüssing's avatar
    batman-adv: Add IPv4 link-local/IPv6-ll-all-nodes multicast support · ab49886e
    Linus Lüssing authored
    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: default avatarLinus Lüssing <linus.luessing@web.de>
    Signed-off-by: default avatarMarek Lindner <mareklindner@neomailbox.ch>
    Signed-off-by: default avatarAntonio Quartulli <antonio@meshcoding.com>
    ab49886e
types.h 45.2 KB