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/seq_file.h>
  14 #include <linux/skbuff.h>
  15
  16 /**
  17  * enum batadv_forw_mode - the way a packet should be forwarded as
  18  */
  19 enum batadv_forw_mode {
  20         /**
  21          * @BATADV_FORW_ALL: forward the packet to all nodes (currently via
  22          *  classic flooding)
  23          */
  24         BATADV_FORW_ALL,
  25
  26         /**
  27          * @BATADV_FORW_SOME: forward the packet to some nodes (currently via
  28          *  a multicast-to-unicast conversion and the BATMAN unicast routing
  29          *  protocol)
  30          */
  31         BATADV_FORW_SOME,
  32
  33         /**
  34          * @BATADV_FORW_SINGLE: forward the packet to a single node (currently
  35          *  via the BATMAN unicast routing protocol)
  36          */
  37         BATADV_FORW_SINGLE,
  38
  39         /** @BATADV_FORW_NONE: don't forward, drop it */
  40         BATADV_FORW_NONE,
  41 };
  42
  43 #ifdef CONFIG_BATMAN_ADV_MCAST
  44
  45 enum batadv_forw_mode
  46 batadv_mcast_forw_mode(struct batadv_priv *bat_priv, struct sk_buff *skb,
  47                        struct batadv_orig_node **mcast_single_orig);
  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);
  56
  57 void batadv_mcast_init(struct batadv_priv *bat_priv);
  58
  59 int batadv_mcast_flags_seq_print_text(struct seq_file *seq, void *offset);
  60
  61 int batadv_mcast_mesh_info_put(struct sk_buff *msg,
  62                                struct batadv_priv *bat_priv);
  63
  64 int batadv_mcast_flags_dump(struct sk_buff *msg, struct netlink_callback *cb);
  65
  66 void batadv_mcast_free(struct batadv_priv *bat_priv);
  67
  68 void batadv_mcast_purge_orig(struct batadv_orig_node *orig_node);
  69
  70 #else
  71
  72 static inline enum batadv_forw_mode
  73 batadv_mcast_forw_mode(struct batadv_priv *bat_priv, struct sk_buff *skb,
  74                        struct batadv_orig_node **mcast_single_orig)
  75 {
  76         return BATADV_FORW_ALL;
  77 }
  78
  79 static inline int
  80 batadv_mcast_forw_send_orig(struct batadv_priv *bat_priv,
  81                             struct sk_buff *skb,
  82                             unsigned short vid,
  83                             struct batadv_orig_node *orig_node)
  84 {
  85         kfree_skb(skb);
  86         return NET_XMIT_DROP;
  87 }
  88
  89 static inline int
  90 batadv_mcast_forw_send(struct batadv_priv *bat_priv, struct sk_buff *skb,
  91                        unsigned short vid)
  92 {
  93         kfree_skb(skb);
  94         return NET_XMIT_DROP;
  95 }
  96
  97 static inline int batadv_mcast_init(struct batadv_priv *bat_priv)
  98 {
  99         return 0;
 100 }
 101
 102 static inline int
 103 batadv_mcast_mesh_info_put(struct sk_buff *msg, struct batadv_priv *bat_priv)
 104 {
 105         return 0;
 106 }
 107
 108 static inline int batadv_mcast_flags_dump(struct sk_buff *msg,
 109                                           struct netlink_callback *cb)
 110 {
 111         return -EOPNOTSUPP;
 112 }
 113
 114 static inline void batadv_mcast_free(struct batadv_priv *bat_priv)
 115 {
 116 }
 117
 118 static inline void batadv_mcast_purge_orig(struct batadv_orig_node *orig_node)
 119 {
 120 }
 121
 122 #endif /* CONFIG_BATMAN_ADV_MCAST */
 123
 124 #endif /* _NET_BATMAN_ADV_MULTICAST_H_ */