xref: /linux/net/batman-adv/bridge_loop_avoidance.h (revision 762f99f4f3cb41a775b5157dd761217beba65873)
1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* Copyright (C) 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  */
batadv_bla_is_loopdetect_mac(const uint8_t * mac)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 #ifdef CONFIG_BATMAN_ADV_DAT
56 bool batadv_bla_check_claim(struct batadv_priv *bat_priv, u8 *addr,
57 			    unsigned short vid);
58 #endif
59 #define BATADV_BLA_CRC_INIT	0
60 #else /* ifdef CONFIG_BATMAN_ADV_BLA */
61 
batadv_bla_rx(struct batadv_priv * bat_priv,struct sk_buff * skb,unsigned short vid,int packet_type)62 static inline bool batadv_bla_rx(struct batadv_priv *bat_priv,
63 				 struct sk_buff *skb, unsigned short vid,
64 				 int packet_type)
65 {
66 	return false;
67 }
68 
batadv_bla_tx(struct batadv_priv * bat_priv,struct sk_buff * skb,unsigned short vid)69 static inline bool batadv_bla_tx(struct batadv_priv *bat_priv,
70 				 struct sk_buff *skb, unsigned short vid)
71 {
72 	return false;
73 }
74 
batadv_bla_is_backbone_gw(struct sk_buff * skb,struct batadv_orig_node * orig_node,int hdr_size)75 static inline bool batadv_bla_is_backbone_gw(struct sk_buff *skb,
76 					     struct batadv_orig_node *orig_node,
77 					     int hdr_size)
78 {
79 	return false;
80 }
81 
batadv_bla_is_backbone_gw_orig(struct batadv_priv * bat_priv,u8 * orig,unsigned short vid)82 static inline bool batadv_bla_is_backbone_gw_orig(struct batadv_priv *bat_priv,
83 						  u8 *orig, unsigned short vid)
84 {
85 	return false;
86 }
87 
88 static inline bool
batadv_bla_check_bcast_duplist(struct batadv_priv * bat_priv,struct sk_buff * skb)89 batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv,
90 			       struct sk_buff *skb)
91 {
92 	return false;
93 }
94 
95 static inline void
batadv_bla_update_orig_address(struct batadv_priv * bat_priv,struct batadv_hard_iface * primary_if,struct batadv_hard_iface * oldif)96 batadv_bla_update_orig_address(struct batadv_priv *bat_priv,
97 			       struct batadv_hard_iface *primary_if,
98 			       struct batadv_hard_iface *oldif)
99 {
100 }
101 
batadv_bla_init(struct batadv_priv * bat_priv)102 static inline int batadv_bla_init(struct batadv_priv *bat_priv)
103 {
104 	return 1;
105 }
106 
batadv_bla_free(struct batadv_priv * bat_priv)107 static inline void batadv_bla_free(struct batadv_priv *bat_priv)
108 {
109 }
110 
batadv_bla_claim_dump(struct sk_buff * msg,struct netlink_callback * cb)111 static inline int batadv_bla_claim_dump(struct sk_buff *msg,
112 					struct netlink_callback *cb)
113 {
114 	return -EOPNOTSUPP;
115 }
116 
batadv_bla_backbone_dump(struct sk_buff * msg,struct netlink_callback * cb)117 static inline int batadv_bla_backbone_dump(struct sk_buff *msg,
118 					   struct netlink_callback *cb)
119 {
120 	return -EOPNOTSUPP;
121 }
122 
123 static inline
batadv_bla_check_claim(struct batadv_priv * bat_priv,u8 * addr,unsigned short vid)124 bool batadv_bla_check_claim(struct batadv_priv *bat_priv, u8 *addr,
125 			    unsigned short vid)
126 {
127 	return true;
128 }
129 
130 #endif /* ifdef CONFIG_BATMAN_ADV_BLA */
131 
132 #endif /* ifndef _NET_BATMAN_ADV_BLA_H_ */
133