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