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authorLinus Lüssing <linus.luessing@web.de>2014-02-15 11:47:53 -0500
committerAntonio Quartulli <antonio@meshcoding.com>2014-03-22 04:18:58 -0400
commitab49886e3da73b6b35ece21006e191910427bb30 (patch)
treed4ae8a3192413628fd8301044fcd039c57ba7066 /net/batman-adv/soft-interface.c
parent1d8ab8d3c176d31530b3ffd4547cf731018e2a45 (diff)
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/soft-interface.c')
-rw-r--r--net/batman-adv/soft-interface.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c
index 1a643fe647e1..db6fecaddb9c 100644
--- a/net/batman-adv/soft-interface.c
+++ b/net/batman-adv/soft-interface.c
@@ -710,6 +710,7 @@ static int batadv_softif_init_late(struct net_device *dev)
710 bat_priv->mcast.flags = BATADV_NO_FLAGS; 710 bat_priv->mcast.flags = BATADV_NO_FLAGS;
711 atomic_set(&bat_priv->multicast_mode, 1); 711 atomic_set(&bat_priv->multicast_mode, 1);
712 atomic_set(&bat_priv->mcast.num_disabled, 0); 712 atomic_set(&bat_priv->mcast.num_disabled, 0);
713 atomic_set(&bat_priv->mcast.num_want_all_unsnoopables, 0);
713#endif 714#endif
714 atomic_set(&bat_priv->gw_mode, BATADV_GW_MODE_OFF); 715 atomic_set(&bat_priv->gw_mode, BATADV_GW_MODE_OFF);
715 atomic_set(&bat_priv->gw_sel_class, 20); 716 atomic_set(&bat_priv->gw_sel_class, 20);