net/batman-adv/multicast.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /* Copyright (C) 2014-2018  B.A.T.M.A.N. contributors:
   3  *
   4  * Linus Lüssing
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of version 2 of the GNU General Public
   8  * License as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #ifndef _NET_BATMAN_ADV_MULTICAST_H_
  20 #define _NET_BATMAN_ADV_MULTICAST_H_
  21
  22 #include "main.h"
  23
  24 struct netlink_callback;
  25 struct seq_file;
  26 struct sk_buff;
  27
  28 /**
  29  * enum batadv_forw_mode - the way a packet should be forwarded as
  30  */
  31 enum batadv_forw_mode {
  32         /**
  33          * @BATADV_FORW_ALL: forward the packet to all nodes (currently via
  34          *  classic flooding)
  35          */
  36         BATADV_FORW_ALL,
  37
  38         /**
  39          * @BATADV_FORW_SINGLE: forward the packet to a single node (currently
  40          *  via the BATMAN unicast routing protocol)
  41          */
  42         BATADV_FORW_SINGLE,
  43
  44         /** @BATADV_FORW_NONE: don't forward, drop it */
  45         BATADV_FORW_NONE,
  46 };
  47
  48 #ifdef CONFIG_BATMAN_ADV_MCAST
  49
  50 enum batadv_forw_mode
  51 batadv_mcast_forw_mode(struct batadv_priv *bat_priv, struct sk_buff *skb,
  52                        struct batadv_orig_node **mcast_single_orig);
  53
  54 int batadv_mcast_forw_send_orig(struct batadv_priv *bat_priv,
  55                                 struct sk_buff *skb,
  56                                 unsigned short vid,
  57                                 struct batadv_orig_node *orig_node);
  58
  59 void batadv_mcast_init(struct batadv_priv *bat_priv);
  60
  61 int batadv_mcast_flags_seq_print_text(struct seq_file *seq, void *offset);
  62
  63 int batadv_mcast_mesh_info_put(struct sk_buff *msg,
  64                                struct batadv_priv *bat_priv);
  65
  66 int batadv_mcast_flags_dump(struct sk_buff *msg, struct netlink_callback *cb);
  67
  68 void batadv_mcast_free(struct batadv_priv *bat_priv);
  69
  70 void batadv_mcast_purge_orig(struct batadv_orig_node *orig_node);
  71
  72 #else
  73
  74 static inline enum batadv_forw_mode
  75 batadv_mcast_forw_mode(struct batadv_priv *bat_priv, struct sk_buff *skb,
  76                        struct batadv_orig_node **mcast_single_orig)
  77 {
  78         return BATADV_FORW_ALL;
  79 }
  80
  81 static inline int batadv_mcast_init(struct batadv_priv *bat_priv)
  82 {
  83         return 0;
  84 }
  85
  86 static inline int
  87 batadv_mcast_forw_send_orig(struct batadv_priv *bat_priv,
  88                             struct sk_buff *skb,
  89                             unsigned short vid,
  90                             struct batadv_orig_node *orig_node)
  91 {
  92         kfree_skb(skb);
  93         return NET_XMIT_DROP;
  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 #endif /* CONFIG_BATMAN_ADV_MCAST */
 117
 118 #endif /* _NET_BATMAN_ADV_MULTICAST_H_ */