1 /* Copyright (C) 2011-2017  B.A.T.M.A.N. contributors:
2  *
3  * Simon Wunderlich
4  *
5  * This program is free software; you can redistribute it and/or
6  * modify it under the terms of version 2 of the GNU General Public
7  * License as published by the Free Software Foundation.
8  *
9  * This program is distributed in the hope that it will be useful, but
10  * WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License
15  * along with this program; if not, see <http://www.gnu.org/licenses/>.
16  */
17 
18 #ifndef _NET_BATMAN_ADV_BLA_H_
19 #define _NET_BATMAN_ADV_BLA_H_
20 
21 #include "main.h"
22 
23 #include <linux/compiler.h>
24 #include <linux/stddef.h>
25 #include <linux/types.h>
26 
27 struct net_device;
28 struct netlink_callback;
29 struct seq_file;
30 struct sk_buff;
31 
32 /**
33  * batadv_bla_is_loopdetect_mac - check if the mac address is from a loop detect
34  *  frame sent by bridge loop avoidance
35  * @mac: mac address to check
36  *
37  * Return: true if the it looks like a loop detect frame
38  * (mac starts with BA:BE), false otherwise
39  */
40 static inline bool batadv_bla_is_loopdetect_mac(const uint8_t *mac)
41 {
42 	if (mac[0] == 0xba && mac[1] == 0xbe)
43 		return true;
44 
45 	return false;
46 }
47 
48 #ifdef CONFIG_BATMAN_ADV_BLA
49 bool batadv_bla_rx(struct batadv_priv *bat_priv, struct sk_buff *skb,
50 		   unsigned short vid, bool is_bcast);
51 bool batadv_bla_tx(struct batadv_priv *bat_priv, struct sk_buff *skb,
52 		   unsigned short vid);
53 bool batadv_bla_is_backbone_gw(struct sk_buff *skb,
54 			       struct batadv_orig_node *orig_node,
55 			       int hdr_size);
56 int batadv_bla_claim_table_seq_print_text(struct seq_file *seq, void *offset);
57 int batadv_bla_claim_dump(struct sk_buff *msg, struct netlink_callback *cb);
58 int batadv_bla_backbone_table_seq_print_text(struct seq_file *seq,
59 					     void *offset);
60 int batadv_bla_backbone_dump(struct sk_buff *msg, struct netlink_callback *cb);
61 bool batadv_bla_is_backbone_gw_orig(struct batadv_priv *bat_priv, u8 *orig,
62 				    unsigned short vid);
63 bool batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv,
64 				    struct sk_buff *skb);
65 void batadv_bla_update_orig_address(struct batadv_priv *bat_priv,
66 				    struct batadv_hard_iface *primary_if,
67 				    struct batadv_hard_iface *oldif);
68 void batadv_bla_status_update(struct net_device *net_dev);
69 int batadv_bla_init(struct batadv_priv *bat_priv);
70 void batadv_bla_free(struct batadv_priv *bat_priv);
71 int batadv_bla_claim_dump(struct sk_buff *msg, struct netlink_callback *cb);
72 #define BATADV_BLA_CRC_INIT	0
73 #else /* ifdef CONFIG_BATMAN_ADV_BLA */
74 
75 static inline bool batadv_bla_rx(struct batadv_priv *bat_priv,
76 				 struct sk_buff *skb, unsigned short vid,
77 				 bool is_bcast)
78 {
79 	return false;
80 }
81 
82 static inline bool batadv_bla_tx(struct batadv_priv *bat_priv,
83 				 struct sk_buff *skb, unsigned short vid)
84 {
85 	return false;
86 }
87 
88 static inline bool batadv_bla_is_backbone_gw(struct sk_buff *skb,
89 					     struct batadv_orig_node *orig_node,
90 					     int hdr_size)
91 {
92 	return false;
93 }
94 
95 static inline int batadv_bla_claim_table_seq_print_text(struct seq_file *seq,
96 							void *offset)
97 {
98 	return 0;
99 }
100 
101 static inline int batadv_bla_backbone_table_seq_print_text(struct seq_file *seq,
102 							   void *offset)
103 {
104 	return 0;
105 }
106 
107 static inline bool batadv_bla_is_backbone_gw_orig(struct batadv_priv *bat_priv,
108 						  u8 *orig, unsigned short vid)
109 {
110 	return false;
111 }
112 
113 static inline bool
114 batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv,
115 			       struct sk_buff *skb)
116 {
117 	return false;
118 }
119 
120 static inline void
121 batadv_bla_update_orig_address(struct batadv_priv *bat_priv,
122 			       struct batadv_hard_iface *primary_if,
123 			       struct batadv_hard_iface *oldif)
124 {
125 }
126 
127 static inline int batadv_bla_init(struct batadv_priv *bat_priv)
128 {
129 	return 1;
130 }
131 
132 static inline void batadv_bla_free(struct batadv_priv *bat_priv)
133 {
134 }
135 
136 static inline int batadv_bla_claim_dump(struct sk_buff *msg,
137 					struct netlink_callback *cb)
138 {
139 	return -EOPNOTSUPP;
140 }
141 
142 static inline int batadv_bla_backbone_dump(struct sk_buff *msg,
143 					   struct netlink_callback *cb)
144 {
145 	return -EOPNOTSUPP;
146 }
147 
148 #endif /* ifdef CONFIG_BATMAN_ADV_BLA */
149 
150 #endif /* ifndef _NET_BATMAN_ADV_BLA_H_ */
151