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
49 int batadv_mcast_forw_send_orig(struct batadv_priv *bat_priv,
50 struct sk_buff *skb,
51 unsigned short vid,
52 struct batadv_orig_node *orig_node);
53
54 int batadv_mcast_forw_send(struct batadv_priv *bat_priv, struct sk_buff *skb,
55 unsigned short vid);
56
57 void batadv_mcast_init(struct batadv_priv *bat_priv);
58
59 int batadv_mcast_flags_seq_print_text(struct seq_file *seq, void *offset);
60
61 int batadv_mcast_mesh_info_put(struct sk_buff *msg,
62 struct batadv_priv *bat_priv);
63
64 int batadv_mcast_flags_dump(struct sk_buff *msg, struct netlink_callback *cb);
65
66 void batadv_mcast_free(struct batadv_priv *bat_priv);
67
68 void batadv_mcast_purge_orig(struct batadv_orig_node *orig_node);
69
70 #else
71
72 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)73 batadv_mcast_forw_mode(struct batadv_priv *bat_priv, struct sk_buff *skb,
74 struct batadv_orig_node **mcast_single_orig)
75 {
76 return BATADV_FORW_ALL;
77 }
78
79 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)80 batadv_mcast_forw_send_orig(struct batadv_priv *bat_priv,
81 struct sk_buff *skb,
82 unsigned short vid,
83 struct batadv_orig_node *orig_node)
84 {
85 kfree_skb(skb);
86 return NET_XMIT_DROP;
87 }
88
89 static inline int
batadv_mcast_forw_send(struct batadv_priv * bat_priv,struct sk_buff * skb,unsigned short vid)90 batadv_mcast_forw_send(struct batadv_priv *bat_priv, struct sk_buff *skb,
91 unsigned short vid)
92 {
93 kfree_skb(skb);
94 return NET_XMIT_DROP;
95 }
96
batadv_mcast_init(struct batadv_priv * bat_priv)97 static inline int batadv_mcast_init(struct batadv_priv *bat_priv)
98 {
99 return 0;
100 }
101
102 static inline int
batadv_mcast_mesh_info_put(struct sk_buff * msg,struct batadv_priv * bat_priv)103 batadv_mcast_mesh_info_put(struct sk_buff *msg, struct batadv_priv *bat_priv)
104 {
105 return 0;
106 }
107
batadv_mcast_flags_dump(struct sk_buff * msg,struct netlink_callback * cb)108 static inline int batadv_mcast_flags_dump(struct sk_buff *msg,
109 struct netlink_callback *cb)
110 {
111 return -EOPNOTSUPP;
112 }
113
batadv_mcast_free(struct batadv_priv * bat_priv)114 static inline void batadv_mcast_free(struct batadv_priv *bat_priv)
115 {
116 }
117
batadv_mcast_purge_orig(struct batadv_orig_node * orig_node)118 static inline void batadv_mcast_purge_orig(struct batadv_orig_node *orig_node)
119 {
120 }
121
122 #endif /* CONFIG_BATMAN_ADV_MCAST */
123
124 #endif /* _NET_BATMAN_ADV_MULTICAST_H_ */
125
