xref: /linux/net/batman-adv/multicast.h (revision 06d07429858317ded2db7986113a9e0129cd599b)
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
batadv_mcast_forw_mode(struct batadv_priv * bat_priv,struct sk_buff * skb,unsigned short vid,int * is_routable)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
batadv_mcast_forw_send(struct batadv_priv * bat_priv,struct sk_buff * skb,unsigned short vid,int is_routable)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 
batadv_mcast_init(struct batadv_priv * bat_priv)91 static inline int batadv_mcast_init(struct batadv_priv *bat_priv)
92 {
93 	return 0;
94 }
95 
96 static inline int
batadv_mcast_mesh_info_put(struct sk_buff * msg,struct batadv_priv * bat_priv)97 batadv_mcast_mesh_info_put(struct sk_buff *msg, struct batadv_priv *bat_priv)
98 {
99 	return 0;
100 }
101 
batadv_mcast_flags_dump(struct sk_buff * msg,struct netlink_callback * cb)102 static inline int batadv_mcast_flags_dump(struct sk_buff *msg,
103 					  struct netlink_callback *cb)
104 {
105 	return -EOPNOTSUPP;
106 }
107 
batadv_mcast_free(struct batadv_priv * bat_priv)108 static inline void batadv_mcast_free(struct batadv_priv *bat_priv)
109 {
110 }
111 
batadv_mcast_purge_orig(struct batadv_orig_node * orig_node)112 static inline void batadv_mcast_purge_orig(struct batadv_orig_node *orig_node)
113 {
114 }
115 
batadv_mcast_forw_mcsend(struct batadv_priv * bat_priv,struct sk_buff * skb)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