1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* Copyright (C) 2011-2019  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/stddef.h>
14 #include <linux/types.h>
15 
16 struct net_device;
17 struct netlink_callback;
18 struct seq_file;
19 struct sk_buff;
20 
21 /**
22  * batadv_bla_is_loopdetect_mac() - check if the mac address is from a loop
23  *  detect frame sent by bridge loop avoidance
24  * @mac: mac address to check
25  *
26  * Return: true if the it looks like a loop detect frame
27  * (mac starts with BA:BE), false otherwise
28  */
29 static inline bool batadv_bla_is_loopdetect_mac(const uint8_t *mac)
30 {
31 	if (mac[0] == 0xba && mac[1] == 0xbe)
32 		return true;
33 
34 	return false;
35 }
36 
37 #ifdef CONFIG_BATMAN_ADV_BLA
38 bool batadv_bla_rx(struct batadv_priv *bat_priv, struct sk_buff *skb,
39 		   unsigned short vid, bool is_bcast);
40 bool batadv_bla_tx(struct batadv_priv *bat_priv, struct sk_buff *skb,
41 		   unsigned short vid);
42 bool batadv_bla_is_backbone_gw(struct sk_buff *skb,
43 			       struct batadv_orig_node *orig_node,
44 			       int hdr_size);
45 int batadv_bla_claim_table_seq_print_text(struct seq_file *seq, void *offset);
46 int batadv_bla_claim_dump(struct sk_buff *msg, struct netlink_callback *cb);
47 int batadv_bla_backbone_table_seq_print_text(struct seq_file *seq,
48 					     void *offset);
49 int batadv_bla_backbone_dump(struct sk_buff *msg, struct netlink_callback *cb);
50 bool batadv_bla_is_backbone_gw_orig(struct batadv_priv *bat_priv, u8 *orig,
51 				    unsigned short vid);
52 bool batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv,
53 				    struct sk_buff *skb);
54 void batadv_bla_update_orig_address(struct batadv_priv *bat_priv,
55 				    struct batadv_hard_iface *primary_if,
56 				    struct batadv_hard_iface *oldif);
57 void batadv_bla_status_update(struct net_device *net_dev);
58 int batadv_bla_init(struct batadv_priv *bat_priv);
59 void batadv_bla_free(struct batadv_priv *bat_priv);
60 int batadv_bla_claim_dump(struct sk_buff *msg, struct netlink_callback *cb);
61 #ifdef CONFIG_BATMAN_ADV_DAT
62 bool batadv_bla_check_claim(struct batadv_priv *bat_priv, u8 *addr,
63 			    unsigned short vid);
64 #endif
65 #define BATADV_BLA_CRC_INIT	0
66 #else /* ifdef CONFIG_BATMAN_ADV_BLA */
67 
68 static inline bool batadv_bla_rx(struct batadv_priv *bat_priv,
69 				 struct sk_buff *skb, unsigned short vid,
70 				 bool is_bcast)
71 {
72 	return false;
73 }
74 
75 static inline bool batadv_bla_tx(struct batadv_priv *bat_priv,
76 				 struct sk_buff *skb, unsigned short vid)
77 {
78 	return false;
79 }
80 
81 static inline bool batadv_bla_is_backbone_gw(struct sk_buff *skb,
82 					     struct batadv_orig_node *orig_node,
83 					     int hdr_size)
84 {
85 	return false;
86 }
87 
88 static inline int batadv_bla_claim_table_seq_print_text(struct seq_file *seq,
89 							void *offset)
90 {
91 	return 0;
92 }
93 
94 static inline int batadv_bla_backbone_table_seq_print_text(struct seq_file *seq,
95 							   void *offset)
96 {
97 	return 0;
98 }
99 
100 static inline bool batadv_bla_is_backbone_gw_orig(struct batadv_priv *bat_priv,
101 						  u8 *orig, unsigned short vid)
102 {
103 	return false;
104 }
105 
106 static inline bool
107 batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv,
108 			       struct sk_buff *skb)
109 {
110 	return false;
111 }
112 
113 static inline void
114 batadv_bla_update_orig_address(struct batadv_priv *bat_priv,
115 			       struct batadv_hard_iface *primary_if,
116 			       struct batadv_hard_iface *oldif)
117 {
118 }
119 
120 static inline int batadv_bla_init(struct batadv_priv *bat_priv)
121 {
122 	return 1;
123 }
124 
125 static inline void batadv_bla_free(struct batadv_priv *bat_priv)
126 {
127 }
128 
129 static inline int batadv_bla_claim_dump(struct sk_buff *msg,
130 					struct netlink_callback *cb)
131 {
132 	return -EOPNOTSUPP;
133 }
134 
135 static inline int batadv_bla_backbone_dump(struct sk_buff *msg,
136 					   struct netlink_callback *cb)
137 {
138 	return -EOPNOTSUPP;
139 }
140 
141 static inline
142 bool batadv_bla_check_claim(struct batadv_priv *bat_priv, u8 *addr,
143 			    unsigned short vid)
144 {
145 	return true;
146 }
147 
148 #endif /* ifdef CONFIG_BATMAN_ADV_BLA */
149 
150 #endif /* ifndef _NET_BATMAN_ADV_BLA_H_ */
151