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 
15 /**
16  * enum batadv_forw_mode - the way a packet should be forwarded as
17  */
18 enum batadv_forw_mode {
19 	/**
20 	 * @BATADV_FORW_ALL: forward the packet to all nodes (currently via
21 	 *  classic flooding)
22 	 */
23 	BATADV_FORW_ALL,
24 
25 	/**
26 	 * @BATADV_FORW_SOME: forward the packet to some nodes (currently via
27 	 *  a multicast-to-unicast conversion and the BATMAN unicast routing
28 	 *  protocol)
29 	 */
30 	BATADV_FORW_SOME,
31 
32 	/**
33 	 * @BATADV_FORW_SINGLE: forward the packet to a single node (currently
34 	 *  via the BATMAN unicast routing protocol)
35 	 */
36 	BATADV_FORW_SINGLE,
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 		       struct batadv_orig_node **mcast_single_orig,
47 		       int *is_routable);
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, int is_routable);
56 
57 void batadv_mcast_init(struct batadv_priv *bat_priv);
58 
59 int batadv_mcast_mesh_info_put(struct sk_buff *msg,
60 			       struct batadv_priv *bat_priv);
61 
62 int batadv_mcast_flags_dump(struct sk_buff *msg, struct netlink_callback *cb);
63 
64 void batadv_mcast_free(struct batadv_priv *bat_priv);
65 
66 void batadv_mcast_purge_orig(struct batadv_orig_node *orig_node);
67 
68 #else
69 
70 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)71 batadv_mcast_forw_mode(struct batadv_priv *bat_priv, struct sk_buff *skb,
72 		       struct batadv_orig_node **mcast_single_orig,
73 		       int *is_routable)
74 {
75 	return BATADV_FORW_ALL;
76 }
77 
78 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)79 batadv_mcast_forw_send_orig(struct batadv_priv *bat_priv,
80 			    struct sk_buff *skb,
81 			    unsigned short vid,
82 			    struct batadv_orig_node *orig_node)
83 {
84 	kfree_skb(skb);
85 	return NET_XMIT_DROP;
86 }
87 
88 static inline int
batadv_mcast_forw_send(struct batadv_priv * bat_priv,struct sk_buff * skb,unsigned short vid,int is_routable)89 batadv_mcast_forw_send(struct batadv_priv *bat_priv, struct sk_buff *skb,
90 		       unsigned short vid, int is_routable)
91 {
92 	kfree_skb(skb);
93 	return NET_XMIT_DROP;
94 }
95 
batadv_mcast_init(struct batadv_priv * bat_priv)96 static inline int batadv_mcast_init(struct batadv_priv *bat_priv)
97 {
98 	return 0;
99 }
100 
101 static inline int
batadv_mcast_mesh_info_put(struct sk_buff * msg,struct batadv_priv * bat_priv)102 batadv_mcast_mesh_info_put(struct sk_buff *msg, struct batadv_priv *bat_priv)
103 {
104 	return 0;
105 }
106 
batadv_mcast_flags_dump(struct sk_buff * msg,struct netlink_callback * cb)107 static inline int batadv_mcast_flags_dump(struct sk_buff *msg,
108 					  struct netlink_callback *cb)
109 {
110 	return -EOPNOTSUPP;
111 }
112 
batadv_mcast_free(struct batadv_priv * bat_priv)113 static inline void batadv_mcast_free(struct batadv_priv *bat_priv)
114 {
115 }
116 
batadv_mcast_purge_orig(struct batadv_orig_node * orig_node)117 static inline void batadv_mcast_purge_orig(struct batadv_orig_node *orig_node)
118 {
119 }
120 
121 #endif /* CONFIG_BATMAN_ADV_MCAST */
122 
123 #endif /* _NET_BATMAN_ADV_MULTICAST_H_ */
124