net/batman-adv/multicast.h

   1 /* Copyright (C) 2014-2015 B.A.T.M.A.N. contributors:
   2  *
   3  * Linus Lüssing
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of version 2 of the GNU General Public
   7  * License as published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  12  * General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #ifndef _NET_BATMAN_ADV_MULTICAST_H_
  19 #define _NET_BATMAN_ADV_MULTICAST_H_
  20
  21 #include "main.h"
  22
  23 struct sk_buff;
  24
  25 /**
  26  * batadv_forw_mode - the way a packet should be forwarded as
  27  * @BATADV_FORW_ALL: forward the packet to all nodes (currently via classic
  28  *  flooding)
  29  * @BATADV_FORW_SINGLE: forward the packet to a single node (currently via the
  30  *  BATMAN unicast routing protocol)
  31  * @BATADV_FORW_NONE: don't forward, drop it
  32  */
  33 enum batadv_forw_mode {
  34         BATADV_FORW_ALL,
  35         BATADV_FORW_SINGLE,
  36         BATADV_FORW_NONE,
  37 };
  38
  39 #ifdef CONFIG_BATMAN_ADV_MCAST
  40
  41 void batadv_mcast_mla_update(struct batadv_priv *bat_priv);
  42
  43 enum batadv_forw_mode
  44 batadv_mcast_forw_mode(struct batadv_priv *bat_priv, struct sk_buff *skb,
  45                        struct batadv_orig_node **mcast_single_orig);
  46
  47 int batadv_mcast_forw_send_orig(struct batadv_priv *bat_priv,
  48                                 struct sk_buff *skb,
  49                                 unsigned short vid,
  50                                 struct batadv_orig_node *orig_node);
  51
  52 void batadv_mcast_init(struct batadv_priv *bat_priv);
  53
  54 void batadv_mcast_free(struct batadv_priv *bat_priv);
  55
  56 void batadv_mcast_purge_orig(struct batadv_orig_node *orig_node);
  57
  58 #else
  59
  60 static inline void batadv_mcast_mla_update(struct batadv_priv *bat_priv)
  61 {
  62 }
  63
  64 static inline enum batadv_forw_mode
  65 batadv_mcast_forw_mode(struct batadv_priv *bat_priv, struct sk_buff *skb,
  66                        struct batadv_orig_node **mcast_single_orig)
  67 {
  68         return BATADV_FORW_ALL;
  69 }
  70
  71 static inline int batadv_mcast_init(struct batadv_priv *bat_priv)
  72 {
  73         return 0;
  74 }
  75
  76 static inline int
  77 batadv_mcast_forw_send_orig(struct batadv_priv *bat_priv,
  78                             struct sk_buff *skb,
  79                             unsigned short vid,
  80                             struct batadv_orig_node *orig_node)
  81 {
  82         kfree_skb(skb);
  83         return NET_XMIT_DROP;
  84 }
  85
  86 static inline void batadv_mcast_free(struct batadv_priv *bat_priv)
  87 {
  88 }
  89
  90 static inline void batadv_mcast_purge_orig(struct batadv_orig_node *orig_node)
  91 {
  92 }
  93
  94 #endif /* CONFIG_BATMAN_ADV_MCAST */
  95
  96 #endif /* _NET_BATMAN_ADV_MULTICAST_H_ */