1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* Copyright (C) 2014-2020 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/seq_file.h>
14 #include <linux/skbuff.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_ALL: forward the packet to all nodes (currently via
22 * classic flooding)
23 */
24 BATADV_FORW_ALL,
25
26 /**
27 * @BATADV_FORW_SOME: forward the packet to some nodes (currently via
28 * a multicast-to-unicast conversion and the BATMAN unicast routing
29 * protocol)
30 */
31 BATADV_FORW_SOME,
32
33 /**
34 * @BATADV_FORW_SINGLE: forward the packet to a single node (currently
35 * via the BATMAN unicast routing protocol)
36 */
37 BATADV_FORW_SINGLE,
38
39 /** @BATADV_FORW_NONE: don't forward, drop it */
40 BATADV_FORW_NONE,
41 };
42
43 #ifdef CONFIG_BATMAN_ADV_MCAST
44
45 enum batadv_forw_mode
46 batadv_mcast_forw_mode(struct batadv_priv *bat_priv, struct sk_buff *skb,
47 struct batadv_orig_node **mcast_single_orig,
48 int *is_routable);
49
50 int batadv_mcast_forw_send_orig(struct batadv_priv *bat_priv,
51 struct sk_buff *skb,
52 unsigned short vid,
53 struct batadv_orig_node *orig_node);
54
55 int batadv_mcast_forw_send(struct batadv_priv *bat_priv, struct sk_buff *skb,
56 unsigned short vid, int is_routable);
57
58 void batadv_mcast_init(struct batadv_priv *bat_priv);
59
60 int batadv_mcast_flags_seq_print_text(struct seq_file *seq, void *offset);
61
62 int batadv_mcast_mesh_info_put(struct sk_buff *msg,
63 struct batadv_priv *bat_priv);
64
65 int batadv_mcast_flags_dump(struct sk_buff *msg, struct netlink_callback *cb);
66
67 void batadv_mcast_free(struct batadv_priv *bat_priv);
68
69 void batadv_mcast_purge_orig(struct batadv_orig_node *orig_node);
70
71 #else
72
73 static inline enum batadv_forw_mode
batadv_mcast_forw_mode(struct batadv_priv * bat_priv,struct sk_buff * skb,struct batadv_orig_node ** mcast_single_orig,int * is_routable)74 batadv_mcast_forw_mode(struct batadv_priv *bat_priv, struct sk_buff *skb,
75 struct batadv_orig_node **mcast_single_orig,
76 int *is_routable)
77 {
78 return BATADV_FORW_ALL;
79 }
80
81 static inline int
batadv_mcast_forw_send_orig(struct batadv_priv * bat_priv,struct sk_buff * skb,unsigned short vid,struct batadv_orig_node * orig_node)82 batadv_mcast_forw_send_orig(struct batadv_priv *bat_priv,
83 struct sk_buff *skb,
84 unsigned short vid,
85 struct batadv_orig_node *orig_node)
86 {
87 kfree_skb(skb);
88 return NET_XMIT_DROP;
89 }
90
91 static inline int
batadv_mcast_forw_send(struct batadv_priv * bat_priv,struct sk_buff * skb,unsigned short vid,int is_routable)92 batadv_mcast_forw_send(struct batadv_priv *bat_priv, struct sk_buff *skb,
93 unsigned short vid, int is_routable)
94 {
95 kfree_skb(skb);
96 return NET_XMIT_DROP;
97 }
98
batadv_mcast_init(struct batadv_priv * bat_priv)99 static inline int batadv_mcast_init(struct batadv_priv *bat_priv)
100 {
101 return 0;
102 }
103
104 static inline int
batadv_mcast_mesh_info_put(struct sk_buff * msg,struct batadv_priv * bat_priv)105 batadv_mcast_mesh_info_put(struct sk_buff *msg, struct batadv_priv *bat_priv)
106 {
107 return 0;
108 }
109
batadv_mcast_flags_dump(struct sk_buff * msg,struct netlink_callback * cb)110 static inline int batadv_mcast_flags_dump(struct sk_buff *msg,
111 struct netlink_callback *cb)
112 {
113 return -EOPNOTSUPP;
114 }
115
batadv_mcast_free(struct batadv_priv * bat_priv)116 static inline void batadv_mcast_free(struct batadv_priv *bat_priv)
117 {
118 }
119
batadv_mcast_purge_orig(struct batadv_orig_node * orig_node)120 static inline void batadv_mcast_purge_orig(struct batadv_orig_node *orig_node)
121 {
122 }
123
124 #endif /* CONFIG_BATMAN_ADV_MCAST */
125
126 #endif /* _NET_BATMAN_ADV_MULTICAST_H_ */
127