1/* SPDX-License-Identifier: GPL-2.0 */
2/* Copyright (C) B.A.T.M.A.N. contributors:
3 *
4 * Linus L��ssing
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 */
19enum 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
44enum batadv_forw_mode
45batadv_mcast_forw_mode(struct batadv_priv *bat_priv, struct sk_buff *skb,
46		       unsigned short vid, int *is_routable);
47
48int batadv_mcast_forw_send(struct batadv_priv *bat_priv, struct sk_buff *skb,
49			   unsigned short vid, int is_routable);
50
51void batadv_mcast_init(struct batadv_priv *bat_priv);
52
53int batadv_mcast_mesh_info_put(struct sk_buff *msg,
54			       struct batadv_priv *bat_priv);
55
56int batadv_mcast_flags_dump(struct sk_buff *msg, struct netlink_callback *cb);
57
58void batadv_mcast_free(struct batadv_priv *bat_priv);
59
60void batadv_mcast_purge_orig(struct batadv_orig_node *orig_node);
61
62/* multicast_forw.c */
63
64int batadv_mcast_forw_tracker_tvlv_handler(struct batadv_priv *bat_priv,
65					   struct sk_buff *skb);
66
67unsigned int batadv_mcast_forw_packet_hdrlen(unsigned int num_dests);
68
69bool batadv_mcast_forw_push(struct batadv_priv *bat_priv, struct sk_buff *skb,
70			    unsigned short vid, int is_routable, int count);
71
72int batadv_mcast_forw_mcsend(struct batadv_priv *bat_priv, struct sk_buff *skb);
73
74#else
75
76static inline enum batadv_forw_mode
77batadv_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
83static inline int
84batadv_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
91static inline int batadv_mcast_init(struct batadv_priv *bat_priv)
92{
93	return 0;
94}
95
96static inline int
97batadv_mcast_mesh_info_put(struct sk_buff *msg, struct batadv_priv *bat_priv)
98{
99	return 0;
100}
101
102static inline int batadv_mcast_flags_dump(struct sk_buff *msg,
103					  struct netlink_callback *cb)
104{
105	return -EOPNOTSUPP;
106}
107
108static inline void batadv_mcast_free(struct batadv_priv *bat_priv)
109{
110}
111
112static inline void batadv_mcast_purge_orig(struct batadv_orig_node *orig_node)
113{
114}
115
116static 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_ */
126