1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* Copyright (C) 2011-2018  B.A.T.M.A.N. contributors:
3  *
4  * Simon Wunderlich
5  *
6  * This program is free software; you can redistribute it and/or
7  * modify it under the terms of version 2 of the GNU General Public
8  * License as published by the Free Software Foundation.
9  *
10  * This program is distributed in the hope that it will be useful, but
11  * WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13  * General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public License
16  * along with this program; if not, see <http://www.gnu.org/licenses/>.
17  */
18 
19 #ifndef _NET_BATMAN_ADV_BLA_H_
20 #define _NET_BATMAN_ADV_BLA_H_
21 
22 #include "main.h"
23 
24 #include <linux/compiler.h>
25 #include <linux/stddef.h>
26 #include <linux/types.h>
27 
28 struct net_device;
29 struct netlink_callback;
30 struct seq_file;
31 struct sk_buff;
32 
33 /**
34  * batadv_bla_is_loopdetect_mac() - check if the mac address is from a loop
35  *  detect frame sent by bridge loop avoidance
36  * @mac: mac address to check
37  *
38  * Return: true if the it looks like a loop detect frame
39  * (mac starts with BA:BE), false otherwise
40  */
41 static inline bool batadv_bla_is_loopdetect_mac(const uint8_t *mac)
42 {
43 	if (mac[0] == 0xba && mac[1] == 0xbe)
44 		return true;
45 
46 	return false;
47 }
48 
49 #ifdef CONFIG_BATMAN_ADV_BLA
50 bool batadv_bla_rx(struct batadv_priv *bat_priv, struct sk_buff *skb,
51 		   unsigned short vid, bool is_bcast);
52 bool batadv_bla_tx(struct batadv_priv *bat_priv, struct sk_buff *skb,
53 		   unsigned short vid);
54 bool batadv_bla_is_backbone_gw(struct sk_buff *skb,
55 			       struct batadv_orig_node *orig_node,
56 			       int hdr_size);
57 int batadv_bla_claim_table_seq_print_text(struct seq_file *seq, void *offset);
58 int batadv_bla_claim_dump(struct sk_buff *msg, struct netlink_callback *cb);
59 int batadv_bla_backbone_table_seq_print_text(struct seq_file *seq,
60 					     void *offset);
61 int batadv_bla_backbone_dump(struct sk_buff *msg, struct netlink_callback *cb);
62 bool batadv_bla_is_backbone_gw_orig(struct batadv_priv *bat_priv, u8 *orig,
63 				    unsigned short vid);
64 bool batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv,
65 				    struct sk_buff *skb);
66 void batadv_bla_update_orig_address(struct batadv_priv *bat_priv,
67 				    struct batadv_hard_iface *primary_if,
68 				    struct batadv_hard_iface *oldif);
69 void batadv_bla_status_update(struct net_device *net_dev);
70 int batadv_bla_init(struct batadv_priv *bat_priv);
71 void batadv_bla_free(struct batadv_priv *bat_priv);
72 int batadv_bla_claim_dump(struct sk_buff *msg, struct netlink_callback *cb);
73 #ifdef CONFIG_BATMAN_ADV_DAT
74 bool batadv_bla_check_claim(struct batadv_priv *bat_priv, u8 *addr,
75 			    unsigned short vid);
76 #endif
77 #define BATADV_BLA_CRC_INIT	0
78 #else /* ifdef CONFIG_BATMAN_ADV_BLA */
79 
80 static inline bool batadv_bla_rx(struct batadv_priv *bat_priv,
81 				 struct sk_buff *skb, unsigned short vid,
82 				 bool is_bcast)
83 {
84 	return false;
85 }
86 
87 static inline bool batadv_bla_tx(struct batadv_priv *bat_priv,
88 				 struct sk_buff *skb, unsigned short vid)
89 {
90 	return false;
91 }
92 
93 static inline bool batadv_bla_is_backbone_gw(struct sk_buff *skb,
94 					     struct batadv_orig_node *orig_node,
95 					     int hdr_size)
96 {
97 	return false;
98 }
99 
100 static inline int batadv_bla_claim_table_seq_print_text(struct seq_file *seq,
101 							void *offset)
102 {
103 	return 0;
104 }
105 
106 static inline int batadv_bla_backbone_table_seq_print_text(struct seq_file *seq,
107 							   void *offset)
108 {
109 	return 0;
110 }
111 
112 static inline bool batadv_bla_is_backbone_gw_orig(struct batadv_priv *bat_priv,
113 						  u8 *orig, unsigned short vid)
114 {
115 	return false;
116 }
117 
118 static inline bool
119 batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv,
120 			       struct sk_buff *skb)
121 {
122 	return false;
123 }
124 
125 static inline void
126 batadv_bla_update_orig_address(struct batadv_priv *bat_priv,
127 			       struct batadv_hard_iface *primary_if,
128 			       struct batadv_hard_iface *oldif)
129 {
130 }
131 
132 static inline int batadv_bla_init(struct batadv_priv *bat_priv)
133 {
134 	return 1;
135 }
136 
137 static inline void batadv_bla_free(struct batadv_priv *bat_priv)
138 {
139 }
140 
141 static inline int batadv_bla_claim_dump(struct sk_buff *msg,
142 					struct netlink_callback *cb)
143 {
144 	return -EOPNOTSUPP;
145 }
146 
147 static inline int batadv_bla_backbone_dump(struct sk_buff *msg,
148 					   struct netlink_callback *cb)
149 {
150 	return -EOPNOTSUPP;
151 }
152 
153 static inline
154 bool batadv_bla_check_claim(struct batadv_priv *bat_priv, u8 *addr,
155 			    unsigned short vid)
156 {
157 	return true;
158 }
159 
160 #endif /* ifdef CONFIG_BATMAN_ADV_BLA */
161 
162 #endif /* ifndef _NET_BATMAN_ADV_BLA_H_ */
163