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 #include <linux/types.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_BCAST: forward the packet to all nodes via a batman-adv
  22          *  broadcast packet
  23          */
  24         BATADV_FORW_BCAST,
  25
  26         /**
  27          * @BATADV_FORW_UCASTS: forward the packet to some nodes via one
  28          *  or more batman-adv unicast packets
  29          */
  30         BATADV_FORW_UCASTS,
  31
  32         /**
  33          * @BATADV_FORW_MCAST: forward the packet to some nodes via a
  34          *  batman-adv multicast packet
  35          */
  36         BATADV_FORW_MCAST,
  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                        unsigned short vid, int *is_routable);
  47
  48 int batadv_mcast_forw_send(struct batadv_priv *bat_priv, struct sk_buff *skb,
  49                            unsigned short vid, int is_routable);
  50
  51 void batadv_mcast_init(struct batadv_priv *bat_priv);
  52
  53 int batadv_mcast_mesh_info_put(struct sk_buff *msg,
  54                                struct batadv_priv *bat_priv);
  55
  56 int batadv_mcast_flags_dump(struct sk_buff *msg, struct netlink_callback *cb);
  57
  58 void batadv_mcast_free(struct batadv_priv *bat_priv);
  59
  60 void batadv_mcast_purge_orig(struct batadv_orig_node *orig_node);
  61
  62 /* multicast_forw.c */
  63
  64 int batadv_mcast_forw_tracker_tvlv_handler(struct batadv_priv *bat_priv,
  65                                            struct sk_buff *skb);
  66
  67 unsigned int batadv_mcast_forw_packet_hdrlen(unsigned int num_dests);
  68
  69 bool batadv_mcast_forw_push(struct batadv_priv *bat_priv, struct sk_buff *skb,
  70                             unsigned short vid, int is_routable, int count);
  71
  72 int batadv_mcast_forw_mcsend(struct batadv_priv *bat_priv, struct sk_buff *skb);
  73
  74 #else
  75
  76 static inline enum batadv_forw_mode
  77 batadv_mcast_forw_mode(struct batadv_priv *bat_priv, struct sk_buff *skb,
  78                        unsigned short vid, int *is_routable)
  79 {
  80         return BATADV_FORW_BCAST;
  81 }
  82
  83 static inline int
  84 batadv_mcast_forw_send(struct batadv_priv *bat_priv, struct sk_buff *skb,
  85                        unsigned short vid, int is_routable)
  86 {
  87         kfree_skb(skb);
  88         return NET_XMIT_DROP;
  89 }
  90
  91 static inline int batadv_mcast_init(struct batadv_priv *bat_priv)
  92 {
  93         return 0;
  94 }
  95
  96 static inline int
  97 batadv_mcast_mesh_info_put(struct sk_buff *msg, struct batadv_priv *bat_priv)
  98 {
  99         return 0;
 100 }
 101
 102 static inline int batadv_mcast_flags_dump(struct sk_buff *msg,
 103                                           struct netlink_callback *cb)
 104 {
 105         return -EOPNOTSUPP;
 106 }
 107
 108 static inline void batadv_mcast_free(struct batadv_priv *bat_priv)
 109 {
 110 }
 111
 112 static inline void batadv_mcast_purge_orig(struct batadv_orig_node *orig_node)
 113 {
 114 }
 115
 116 static inline int batadv_mcast_forw_mcsend(struct batadv_priv *bat_priv,
 117                                            struct sk_buff *skb)
 118 {
 119         kfree_skb(skb);
 120         return NET_XMIT_DROP;
 121 }
 122
 123 #endif /* CONFIG_BATMAN_ADV_MCAST */
 124
 125 #endif /* _NET_BATMAN_ADV_MULTICAST_H_ */