net/batman-adv/multicast.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /* Copyright (C) 2014-2020  B.A.T.M.A.N. contributors:
   3  *
   4  * Linus Lüssing
   5  */
   6
   7 #ifndef _NET_BATMAN_ADV_MULTICAST_H_
   8 #define _NET_BATMAN_ADV_MULTICAST_H_
   9
  10 #include "main.h"
  11
  12 #include <linux/netlink.h>
  13 #include <linux/skbuff.h>
  14
  15 /**
  16  * enum batadv_forw_mode - the way a packet should be forwarded as
  17  */
  18 enum batadv_forw_mode {
  19         /**
  20          * @BATADV_FORW_ALL: forward the packet to all nodes (currently via
  21          *  classic flooding)
  22          */
  23         BATADV_FORW_ALL,
  24
  25         /**
  26          * @BATADV_FORW_SOME: forward the packet to some nodes (currently via
  27          *  a multicast-to-unicast conversion and the BATMAN unicast routing
  28          *  protocol)
  29          */
  30         BATADV_FORW_SOME,
  31
  32         /**
  33          * @BATADV_FORW_SINGLE: forward the packet to a single node (currently
  34          *  via the BATMAN unicast routing protocol)
  35          */
  36         BATADV_FORW_SINGLE,
  37
  38         /** @BATADV_FORW_NONE: don't forward, drop it */
  39         BATADV_FORW_NONE,
  40 };
  41
  42 #ifdef CONFIG_BATMAN_ADV_MCAST
  43
  44 enum batadv_forw_mode
  45 batadv_mcast_forw_mode(struct batadv_priv *bat_priv, struct sk_buff *skb,
  46                        struct batadv_orig_node **mcast_single_orig);
  47
  48 int batadv_mcast_forw_send_orig(struct batadv_priv *bat_priv,
  49                                 struct sk_buff *skb,
  50                                 unsigned short vid,
  51                                 struct batadv_orig_node *orig_node);
  52
  53 int batadv_mcast_forw_send(struct batadv_priv *bat_priv, struct sk_buff *skb,
  54                            unsigned short vid);
  55
  56 void batadv_mcast_init(struct batadv_priv *bat_priv);
  57
  58 int batadv_mcast_mesh_info_put(struct sk_buff *msg,
  59                                struct batadv_priv *bat_priv);
  60
  61 int batadv_mcast_flags_dump(struct sk_buff *msg, struct netlink_callback *cb);
  62
  63 void batadv_mcast_free(struct batadv_priv *bat_priv);
  64
  65 void batadv_mcast_purge_orig(struct batadv_orig_node *orig_node);
  66
  67 #else
  68
  69 static inline enum batadv_forw_mode
  70 batadv_mcast_forw_mode(struct batadv_priv *bat_priv, struct sk_buff *skb,
  71                        struct batadv_orig_node **mcast_single_orig)
  72 {
  73         return BATADV_FORW_ALL;
  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 int
  87 batadv_mcast_forw_send(struct batadv_priv *bat_priv, struct sk_buff *skb,
  88                        unsigned short vid)
  89 {
  90         kfree_skb(skb);
  91         return NET_XMIT_DROP;
  92 }
  93
  94 static inline int batadv_mcast_init(struct batadv_priv *bat_priv)
  95 {
  96         return 0;
  97 }
  98
  99 static inline int
 100 batadv_mcast_mesh_info_put(struct sk_buff *msg, struct batadv_priv *bat_priv)
 101 {
 102         return 0;
 103 }
 104
 105 static inline int batadv_mcast_flags_dump(struct sk_buff *msg,
 106                                           struct netlink_callback *cb)
 107 {
 108         return -EOPNOTSUPP;
 109 }
 110
 111 static inline void batadv_mcast_free(struct batadv_priv *bat_priv)
 112 {
 113 }
 114
 115 static inline void batadv_mcast_purge_orig(struct batadv_orig_node *orig_node)
 116 {
 117 }
 118
 119 #endif /* CONFIG_BATMAN_ADV_MCAST */
 120
 121 #endif /* _NET_BATMAN_ADV_MULTICAST_H_ */