diff options
| author |   Linus Lüssing <linus.luessing@web.de> | 2014-02-15 17:47:53 +0100 |
|---|---|---|
| committer |   Antonio Quartulli <antonio@meshcoding.com> | 2014-03-22 09:18:58 +0100 |
| commit | ab49886e3da73b6b35ece21006e191910427bb30 (patch) | |
| tree | d4ae8a3192413628fd8301044fcd039c57ba7066 /net/batman-adv/packet.h | |
| parent | batman-adv: Modified forwarding behaviour for multicast packets (diff) | |
| download | linux-dev-ab49886e3da73b6b35ece21006e191910427bb30.tar.xz linux-dev-ab49886e3da73b6b35ece21006e191910427bb30.zip | |
batman-adv: 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>
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
Diffstat (limited to 'net/batman-adv/packet.h')
| -rw-r--r-- | net/batman-adv/packet.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/net/batman-adv/packet.h b/net/batman-adv/packet.h index e8c483d2da72..d061e26c2045 100644 --- a/net/batman-adv/packet.h +++ b/net/batman-adv/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 |