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_ */
126
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