1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* Copyright (C) 2011-2020  B.A.T.M.A.N. contributors:
3  *
4  * Simon Wunderlich
5  */
6 
7 #ifndef _NET_BATMAN_ADV_BLA_H_
8 #define _NET_BATMAN_ADV_BLA_H_
9 
10 #include "main.h"
11 
12 #include <linux/compiler.h>
13 #include <linux/netdevice.h>
14 #include <linux/netlink.h>
15 #include <linux/skbuff.h>
16 #include <linux/stddef.h>
17 #include <linux/types.h>
18 
19 /**
20  * batadv_bla_is_loopdetect_mac() - check if the mac address is from a loop
21  *  detect frame sent by bridge loop avoidance
22  * @mac: mac address to check
23  *
24  * Return: true if the it looks like a loop detect frame
25  * (mac starts with BA:BE), false otherwise
26  */
27 static inline bool batadv_bla_is_loopdetect_mac(const uint8_t *mac)
28 {
29 	if (mac[0] == 0xba && mac[1] == 0xbe)
30 		return true;
31 
32 	return false;
33 }
34 
35 #ifdef CONFIG_BATMAN_ADV_BLA
36 bool batadv_bla_rx(struct batadv_priv *bat_priv, struct sk_buff *skb,
37 		   unsigned short vid, int packet_type);
38 bool batadv_bla_tx(struct batadv_priv *bat_priv, struct sk_buff *skb,
39 		   unsigned short vid);
40 bool batadv_bla_is_backbone_gw(struct sk_buff *skb,
41 			       struct batadv_orig_node *orig_node,
42 			       int hdr_size);
43 int batadv_bla_claim_dump(struct sk_buff *msg, struct netlink_callback *cb);
44 int batadv_bla_backbone_dump(struct sk_buff *msg, struct netlink_callback *cb);
45 bool batadv_bla_is_backbone_gw_orig(struct batadv_priv *bat_priv, u8 *orig,
46 				    unsigned short vid);
47 bool batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv,
48 				    struct sk_buff *skb);
49 void batadv_bla_update_orig_address(struct batadv_priv *bat_priv,
50 				    struct batadv_hard_iface *primary_if,
51 				    struct batadv_hard_iface *oldif);
52 void batadv_bla_status_update(struct net_device *net_dev);
53 int batadv_bla_init(struct batadv_priv *bat_priv);
54 void batadv_bla_free(struct batadv_priv *bat_priv);
55 int batadv_bla_claim_dump(struct sk_buff *msg, struct netlink_callback *cb);
56 #ifdef CONFIG_BATMAN_ADV_DAT
57 bool batadv_bla_check_claim(struct batadv_priv *bat_priv, u8 *addr,
58 			    unsigned short vid);
59 #endif
60 #define BATADV_BLA_CRC_INIT	0
61 #else /* ifdef CONFIG_BATMAN_ADV_BLA */
62 
63 static inline bool batadv_bla_rx(struct batadv_priv *bat_priv,
64 				 struct sk_buff *skb, unsigned short vid,
65 				 int packet_type)
66 {
67 	return false;
68 }
69 
70 static inline bool batadv_bla_tx(struct batadv_priv *bat_priv,
71 				 struct sk_buff *skb, unsigned short vid)
72 {
73 	return false;
74 }
75 
76 static inline bool batadv_bla_is_backbone_gw(struct sk_buff *skb,
77 					     struct batadv_orig_node *orig_node,
78 					     int hdr_size)
79 {
80 	return false;
81 }
82 
83 static inline bool batadv_bla_is_backbone_gw_orig(struct batadv_priv *bat_priv,
84 						  u8 *orig, unsigned short vid)
85 {
86 	return false;
87 }
88 
89 static inline bool
90 batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv,
91 			       struct sk_buff *skb)
92 {
93 	return false;
94 }
95 
96 static inline void
97 batadv_bla_update_orig_address(struct batadv_priv *bat_priv,
98 			       struct batadv_hard_iface *primary_if,
99 			       struct batadv_hard_iface *oldif)
100 {
101 }
102 
103 static inline int batadv_bla_init(struct batadv_priv *bat_priv)
104 {
105 	return 1;
106 }
107 
108 static inline void batadv_bla_free(struct batadv_priv *bat_priv)
109 {
110 }
111 
112 static inline int batadv_bla_claim_dump(struct sk_buff *msg,
113 					struct netlink_callback *cb)
114 {
115 	return -EOPNOTSUPP;
116 }
117 
118 static inline int batadv_bla_backbone_dump(struct sk_buff *msg,
119 					   struct netlink_callback *cb)
120 {
121 	return -EOPNOTSUPP;
122 }
123 
124 static inline
125 bool batadv_bla_check_claim(struct batadv_priv *bat_priv, u8 *addr,
126 			    unsigned short vid)
127 {
128 	return true;
129 }
130 
131 #endif /* ifdef CONFIG_BATMAN_ADV_BLA */
132 
133 #endif /* ifndef _NET_BATMAN_ADV_BLA_H_ */
134