net/batman-adv/multicast.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /* Copyright (C) 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                        int *is_routable);
  48
  49 int batadv_mcast_forw_send_orig(struct batadv_priv *bat_priv,
  50                                 struct sk_buff *skb,
  51                                 unsigned short vid,
  52                                 struct batadv_orig_node *orig_node);
  53
  54 int batadv_mcast_forw_send(struct batadv_priv *bat_priv, struct sk_buff *skb,
  55                            unsigned short vid, int is_routable);
  56
  57 void batadv_mcast_init(struct batadv_priv *bat_priv);
  58
  59 int batadv_mcast_mesh_info_put(struct sk_buff *msg,
  60                                struct batadv_priv *bat_priv);
  61
  62 int batadv_mcast_flags_dump(struct sk_buff *msg, struct netlink_callback *cb);
  63
  64 void batadv_mcast_free(struct batadv_priv *bat_priv);
  65
  66 void batadv_mcast_purge_orig(struct batadv_orig_node *orig_node);
  67
  68 #else
  69
  70 static inline enum batadv_forw_mode
  71 batadv_mcast_forw_mode(struct batadv_priv *bat_priv, struct sk_buff *skb,
  72                        struct batadv_orig_node **mcast_single_orig,
  73                        int *is_routable)
  74 {
  75         return BATADV_FORW_ALL;
  76 }
  77
  78 static inline int
  79 batadv_mcast_forw_send_orig(struct batadv_priv *bat_priv,
  80                             struct sk_buff *skb,
  81                             unsigned short vid,
  82                             struct batadv_orig_node *orig_node)
  83 {
  84         kfree_skb(skb);
  85         return NET_XMIT_DROP;
  86 }
  87
  88 static inline int
  89 batadv_mcast_forw_send(struct batadv_priv *bat_priv, struct sk_buff *skb,
  90                        unsigned short vid, int is_routable)
  91 {
  92         kfree_skb(skb);
  93         return NET_XMIT_DROP;
  94 }
  95
  96 static inline int batadv_mcast_init(struct batadv_priv *bat_priv)
  97 {
  98         return 0;
  99 }
 100
 101 static inline int
 102 batadv_mcast_mesh_info_put(struct sk_buff *msg, struct batadv_priv *bat_priv)
 103 {
 104         return 0;
 105 }
 106
 107 static inline int batadv_mcast_flags_dump(struct sk_buff *msg,
 108                                           struct netlink_callback *cb)
 109 {
 110         return -EOPNOTSUPP;
 111 }
 112
 113 static inline void batadv_mcast_free(struct batadv_priv *bat_priv)
 114 {
 115 }
 116
 117 static inline void batadv_mcast_purge_orig(struct batadv_orig_node *orig_node)
 118 {
 119 }
 120
 121 #endif /* CONFIG_BATMAN_ADV_MCAST */
 122
 123 #endif /* _NET_BATMAN_ADV_MULTICAST_H_ */