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 */
28static 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
37bool batadv_bla_rx(struct batadv_priv *bat_priv, struct sk_buff *skb,
38		   unsigned short vid, int packet_type);
39bool batadv_bla_tx(struct batadv_priv *bat_priv, struct sk_buff *skb,
40		   unsigned short vid);
41bool batadv_bla_is_backbone_gw(struct sk_buff *skb,
42			       struct batadv_orig_node *orig_node,
43			       int hdr_size);
44int batadv_bla_claim_table_seq_print_text(struct seq_file *seq, void *offset);
45int batadv_bla_claim_dump(struct sk_buff *msg, struct netlink_callback *cb);
46int batadv_bla_backbone_table_seq_print_text(struct seq_file *seq,
47					     void *offset);
48int batadv_bla_backbone_dump(struct sk_buff *msg, struct netlink_callback *cb);
49bool batadv_bla_is_backbone_gw_orig(struct batadv_priv *bat_priv, u8 *orig,
50				    unsigned short vid);
51bool batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv,
52				    struct sk_buff *skb);
53void batadv_bla_update_orig_address(struct batadv_priv *bat_priv,
54				    struct batadv_hard_iface *primary_if,
55				    struct batadv_hard_iface *oldif);
56void batadv_bla_status_update(struct net_device *net_dev);
57int batadv_bla_init(struct batadv_priv *bat_priv);
58void batadv_bla_free(struct batadv_priv *bat_priv);
59int batadv_bla_claim_dump(struct sk_buff *msg, struct netlink_callback *cb);
60#ifdef CONFIG_BATMAN_ADV_DAT
61bool 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
67static inline bool batadv_bla_rx(struct batadv_priv *bat_priv,
68				 struct sk_buff *skb, unsigned short vid,
69				 int packet_type)
70{
71	return false;
72}
73
74static inline bool batadv_bla_tx(struct batadv_priv *bat_priv,
75				 struct sk_buff *skb, unsigned short vid)
76{
77	return false;
78}
79
80static 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
87static inline int batadv_bla_claim_table_seq_print_text(struct seq_file *seq,
88							void *offset)
89{
90	return 0;
91}
92
93static inline int batadv_bla_backbone_table_seq_print_text(struct seq_file *seq,
94							   void *offset)
95{
96	return 0;
97}
98
99static 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
105static inline bool
106batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv,
107			       struct sk_buff *skb)
108{
109	return false;
110}
111
112static inline void
113batadv_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
119static inline int batadv_bla_init(struct batadv_priv *bat_priv)
120{
121	return 1;
122}
123
124static inline void batadv_bla_free(struct batadv_priv *bat_priv)
125{
126}
127
128static inline int batadv_bla_claim_dump(struct sk_buff *msg,
129					struct netlink_callback *cb)
130{
131	return -EOPNOTSUPP;
132}
133
134static inline int batadv_bla_backbone_dump(struct sk_buff *msg,
135					   struct netlink_callback *cb)
136{
137	return -EOPNOTSUPP;
138}
139
140static inline
141bool 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