If the soft interface of a node is not part of a bridge then a node announces a new multicast TVLV: The according flag (BATADV_MCAST_LISTENER_ANNOUNCEMENT) signalizes that this node is announcing all of its multicast listeners via the translation table infrastructure. More precisely, all multicast listeners of scope greater than link-local for IPv4 and of scope greater or equal to link-local for IPv6.
Signed-off-by: Linus Lüssing <[email protected]> --- main.c | 4 ++++ multicast.c | 62 ++++++++++++++++++++++++++++++++++++++++++++++++++++-- multicast.h | 7 ++++++ originator.c | 3 +++ packet.h | 7 ++++++ soft-interface.c | 1 + types.h | 4 ++++ 7 files changed, 86 insertions(+), 2 deletions(-) diff --git a/main.c b/main.c index 1c82c18..6ab5b2d 100644 --- a/main.c +++ b/main.c @@ -145,6 +145,10 @@ int batadv_mesh_init(struct net_device *soft_iface) if (ret < 0) goto err; + ret = batadv_mcast_init(bat_priv); + if (ret < 0) + goto err; + ret = batadv_gw_init(bat_priv); if (ret < 0) goto err; diff --git a/multicast.c b/multicast.c index 88bde61..95beac4 100644 --- a/multicast.c +++ b/multicast.c @@ -170,6 +170,7 @@ void batadv_mcast_mla_tt_update(struct batadv_priv *bat_priv) struct list_head mcast_list; int ret; static bool enabled; + uint8_t mcast_flags; INIT_LIST_HEAD(&mcast_list); @@ -183,14 +184,22 @@ void batadv_mcast_mla_tt_update(struct batadv_priv *bat_priv) * or there is a bridge on top of our soft interface (TODO) */ if (!atomic_read(&bat_priv->mcast_group_awareness) || bat_priv->soft_iface->priv_flags & IFF_BRIDGE_PORT) { - if (enabled) + if (enabled) { + batadv_tvlv_container_unregister(bat_priv, + BATADV_TVLV_MCAST, 1); enabled = false; + } goto update; } - if (!enabled) + if (!enabled) { + mcast_flags = BATADV_MCAST_LISTENER_ANNOUNCEMENT; + batadv_tvlv_container_register(bat_priv, BATADV_TVLV_MCAST, 1, + &mcast_flags, + sizeof(mcast_flags)); enabled = true; + } ret = batadv_mcast_mla_local_collect(soft_iface, &mcast_list, BATADV_MLA_MAX); @@ -209,6 +218,52 @@ out: } /** + * batadv_mcast_tvlv_ogm_handler_v1 - process incoming multicast tvlv container + * @bat_priv: the bat priv with all the soft interface information + * @orig: the orig_node of the ogm + * @flags: flags indicating the tvlv state (see batadv_tvlv_handler_flags) + * @tvlv_value: tvlv buffer containing the multicast data + * @tvlv_value_len: tvlv buffer length + */ +static void batadv_mcast_tvlv_ogm_handler_v1(struct batadv_priv *bat_priv, + struct batadv_orig_node *orig, + uint8_t flags, + void *tvlv_value, + uint16_t tvlv_value_len) +{ + uint8_t mcast_flags = BATADV_NO_FLAGS; + + /* only fetch the tvlv value if the handler wasn't called via the + * CIFNOTFND flag and if there is data to fetch + */ + if (!(flags & BATADV_TVLV_HANDLER_OGM_CIFNOTFND) && + (tvlv_value) && (tvlv_value_len == 1)) + mcast_flags = *(unsigned char *)tvlv_value; + + if (!(mcast_flags & BATADV_MCAST_LISTENER_ANNOUNCEMENT) && + orig->mcast_flags & BATADV_MCAST_LISTENER_ANNOUNCEMENT) { + atomic_inc(&bat_priv->mcast_num_non_aware); + } else if (mcast_flags & BATADV_MCAST_LISTENER_ANNOUNCEMENT && + !(orig->mcast_flags & BATADV_MCAST_LISTENER_ANNOUNCEMENT)) { + atomic_dec(&bat_priv->mcast_num_non_aware); + } + + orig->mcast_flags = mcast_flags; +} + +/** + * batadv_mcast_init - Initializes the multicast optimizations structures + * @bat_priv: the bat priv with all the soft interface information + */ +int batadv_mcast_init(struct batadv_priv *bat_priv) +{ + batadv_tvlv_handler_register(bat_priv, batadv_mcast_tvlv_ogm_handler_v1, + NULL, BATADV_TVLV_MCAST, 1, + BATADV_TVLV_HANDLER_OGM_CIFNOTFND); + return 0; +} + +/** * batadv_mcast_free - Frees the multicast optimizaitons structures * @bat_priv: the bat priv with all the soft interface information */ @@ -218,5 +273,8 @@ void batadv_mcast_free(struct batadv_priv *bat_priv) INIT_LIST_HEAD(&mcast_list); + batadv_tvlv_container_unregister(bat_priv, BATADV_TVLV_MCAST, 1); + batadv_tvlv_handler_unregister(bat_priv, BATADV_TVLV_MCAST, 1); + batadv_mcast_mla_tt_clean(bat_priv, &mcast_list); } diff --git a/multicast.h b/multicast.h index 3b68e3b..9955a18 100644 --- a/multicast.h +++ b/multicast.h @@ -24,6 +24,8 @@ void batadv_mcast_mla_tt_update(struct batadv_priv *bat_priv); +int batadv_mcast_init(struct batadv_priv *bat_priv); + void batadv_mcast_free(struct batadv_priv *bat_priv); #else @@ -33,6 +35,11 @@ static inline void batadv_mcast_mla_tt_update(struct batadv_priv *bat_priv) return; } +static inline int batadv_mcast_init(struct batadv_priv *bat_priv) +{ + return 0; +} + static inline void batadv_mcast_free(struct batadv_priv *bat_priv) { return; diff --git a/originator.c b/originator.c index 5d53d2f..acc0c2d 100644 --- a/originator.c +++ b/originator.c @@ -257,6 +257,9 @@ struct batadv_orig_node *batadv_get_orig_node(struct batadv_priv *bat_priv, reset_time = jiffies - 1 - msecs_to_jiffies(BATADV_RESET_PROTECTION_MS); orig_node->bcast_seqno_reset = reset_time; orig_node->batman_seqno_reset = reset_time; +#ifdef CONFIG_BATMAN_ADV_MCAST_OPTIMIZATIONS + orig_node->mcast_flags = BATADV_MCAST_LISTENER_ANNOUNCEMENT; +#endif atomic_set(&orig_node->bond_candidates, 0); diff --git a/packet.h b/packet.h index 7d45890..c89df30 100644 --- a/packet.h +++ b/packet.h @@ -97,6 +97,11 @@ enum batadv_unicast_frag_flags { BATADV_UNI_FRAG_LARGETAIL = BIT(1), }; +/* multicast capabilities */ +enum batadv_mcast_flags { + BATADV_MCAST_LISTENER_ANNOUNCEMENT = BIT(0), +}; + /* tt data subtypes */ #define BATADV_TT_DATA_TYPE_MASK 0x0F @@ -143,6 +148,7 @@ enum batadv_bla_claimframe { * @BATADV_TVLV_NC: network coding tvlv * @BATADV_TVLV_TT: translation table tvlv * @BATADV_TVLV_ROAM: roaming advertisement tvlv + * @BATADV_TVLV_MCAST: multicast capability tvlv */ enum batadv_tvlv_type { BATADV_TVLV_GW = 0x01, @@ -150,6 +156,7 @@ enum batadv_tvlv_type { BATADV_TVLV_NC = 0x03, BATADV_TVLV_TT = 0x04, BATADV_TVLV_ROAM = 0x05, + BATADV_TVLV_MCAST = 0x06, }; /* the destination hardware field in the ARP frame is used to diff --git a/soft-interface.c b/soft-interface.c index b97dfa2..c1142c2 100644 --- a/soft-interface.c +++ b/soft-interface.c @@ -459,6 +459,7 @@ static int batadv_softif_init_late(struct net_device *dev) #endif #ifdef CONFIG_BATMAN_ADV_MCAST_OPTIMIZATIONS atomic_set(&bat_priv->mcast_group_awareness, 1); + atomic_set(&bat_priv->mcast_num_non_aware, 0); #endif atomic_set(&bat_priv->ap_isolation, 0); atomic_set(&bat_priv->gw_mode, BATADV_GW_MODE_OFF); diff --git a/types.h b/types.h index 5d73a75..4ef5fb9 100644 --- a/types.h +++ b/types.h @@ -146,6 +146,9 @@ struct batadv_orig_node { unsigned long last_seen; unsigned long bcast_seqno_reset; unsigned long batman_seqno_reset; +#ifdef CONFIG_BATMAN_ADV_MCAST_OPTIMIZATIONS + uint8_t mcast_flags; +#endif uint8_t capabilities; atomic_t last_ttvn; uint32_t tt_crc; @@ -569,6 +572,7 @@ struct batadv_priv { #endif #ifdef CONFIG_BATMAN_ADV_MCAST_OPTIMIZATIONS atomic_t mcast_group_awareness; + atomic_t mcast_num_non_aware; #endif atomic_t gw_mode; atomic_t gw_sel_class; -- 1.7.10.4
