LXR linux/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 */
  18enum 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
  44enum batadv_forw_mode
  45batadv_mcast_forw_mode(struct batadv_priv *bat_priv, struct sk_buff *skb,
  46                       struct batadv_orig_node **mcast_single_orig);
  47
  48int 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
  53int batadv_mcast_forw_send(struct batadv_priv *bat_priv, struct sk_buff *skb,
  54                           unsigned short vid);
  55
  56void batadv_mcast_init(struct batadv_priv *bat_priv);
  57
  58int batadv_mcast_mesh_info_put(struct sk_buff *msg,
  59                               struct batadv_priv *bat_priv);
  60
  61int batadv_mcast_flags_dump(struct sk_buff *msg, struct netlink_callback *cb);
  62
  63void batadv_mcast_free(struct batadv_priv *bat_priv);
  64
  65void batadv_mcast_purge_orig(struct batadv_orig_node *orig_node);
  66
  67#else
  68
  69static inline enum batadv_forw_mode
  70batadv_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
  76static inline int
  77batadv_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
  86static inline int
  87batadv_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
  94static inline int batadv_mcast_init(struct batadv_priv *bat_priv)
  95{
  96        return 0;
  97}
  98
  99static inline int
 100batadv_mcast_mesh_info_put(struct sk_buff *msg, struct batadv_priv *bat_priv)
 101{
 102        return 0;
 103}
 104
 105static inline int batadv_mcast_flags_dump(struct sk_buff *msg,
 106                                          struct netlink_callback *cb)
 107{
 108        return -EOPNOTSUPP;
 109}
 110
 111static inline void batadv_mcast_free(struct batadv_priv *bat_priv)
 112{
 113}
 114
 115static 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_ */
 122