net/batman-adv/multicast.h

   1 /* Copyright (C) 2014-2017  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 seq_file;
  24 struct sk_buff;
  25
  26 /**
  27  * enum batadv_forw_mode - the way a packet should be forwarded as
  28  * @BATADV_FORW_ALL: forward the packet to all nodes (currently via classic
  29  *  flooding)
  30  * @BATADV_FORW_SINGLE: forward the packet to a single node (currently via the
  31  *  BATMAN unicast routing protocol)
  32  * @BATADV_FORW_NONE: don't forward, drop it
  33  */
  34 enum batadv_forw_mode {
  35         BATADV_FORW_ALL,
  36         BATADV_FORW_SINGLE,
  37         BATADV_FORW_NONE,
  38 };
  39
  40 #ifdef CONFIG_BATMAN_ADV_MCAST
  41
  42 enum batadv_forw_mode
  43 batadv_mcast_forw_mode(struct batadv_priv *bat_priv, struct sk_buff *skb,
  44                        struct batadv_orig_node **mcast_single_orig);
  45
  46 int batadv_mcast_forw_send_orig(struct batadv_priv *bat_priv,
  47                                 struct sk_buff *skb,
  48                                 unsigned short vid,
  49                                 struct batadv_orig_node *orig_node);
  50
  51 void batadv_mcast_init(struct batadv_priv *bat_priv);
  52
  53 int batadv_mcast_flags_seq_print_text(struct seq_file *seq, void *offset);
  54
  55 void batadv_mcast_free(struct batadv_priv *bat_priv);
  56
  57 void batadv_mcast_purge_orig(struct batadv_orig_node *orig_node);
  58
  59 #else
  60
  61 static inline enum batadv_forw_mode
  62 batadv_mcast_forw_mode(struct batadv_priv *bat_priv, struct sk_buff *skb,
  63                        struct batadv_orig_node **mcast_single_orig)
  64 {
  65         return BATADV_FORW_ALL;
  66 }
  67
  68 static inline int batadv_mcast_init(struct batadv_priv *bat_priv)
  69 {
  70         return 0;
  71 }
  72
  73 static inline int
  74 batadv_mcast_forw_send_orig(struct batadv_priv *bat_priv,
  75                             struct sk_buff *skb,
  76                             unsigned short vid,
  77                             struct batadv_orig_node *orig_node)
  78 {
  79         kfree_skb(skb);
  80         return NET_XMIT_DROP;
  81 }
  82
  83 static inline void batadv_mcast_free(struct batadv_priv *bat_priv)
  84 {
  85 }
  86
  87 static inline void batadv_mcast_purge_orig(struct batadv_orig_node *orig_node)
  88 {
  89 }
  90
  91 #endif /* CONFIG_BATMAN_ADV_MCAST */
  92
  93 #endif /* _NET_BATMAN_ADV_MULTICAST_H_ */