[mirror_ubuntu-jammy-kernel.git] / net / batman-adv / bridge_loop_avoidance.h

/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright (C) 2011-2020  B.A.T.M.A.N. contributors:
 *
 * Simon Wunderlich
 */

#ifndef _NET_BATMAN_ADV_BLA_H_
#define _NET_BATMAN_ADV_BLA_H_

#include "main.h"

#include <linux/compiler.h>
#include <linux/netdevice.h>
#include <linux/netlink.h>
#include <linux/seq_file.h>
#include <linux/skbuff.h>
#include <linux/stddef.h>
#include <linux/types.h>

/**
 * batadv_bla_is_loopdetect_mac() - check if the mac address is from a loop
 *  detect frame sent by bridge loop avoidance
 * @mac: mac address to check
 *
 * Return: true if the it looks like a loop detect frame
 * (mac starts with BA:BE), false otherwise
 */
static inline bool batadv_bla_is_loopdetect_mac(const uint8_t *mac)
{
	if (mac[0] == 0xba && mac[1] == 0xbe)
		return true;

	return false;
}

#ifdef CONFIG_BATMAN_ADV_BLA
bool batadv_bla_rx(struct batadv_priv *bat_priv, struct sk_buff *skb,
		   unsigned short vid, bool is_bcast);
bool batadv_bla_tx(struct batadv_priv *bat_priv, struct sk_buff *skb,
		   unsigned short vid);
bool batadv_bla_is_backbone_gw(struct sk_buff *skb,
			       struct batadv_orig_node *orig_node,
			       int hdr_size);
int batadv_bla_claim_table_seq_print_text(struct seq_file *seq, void *offset);
int batadv_bla_claim_dump(struct sk_buff *msg, struct netlink_callback *cb);
int batadv_bla_backbone_table_seq_print_text(struct seq_file *seq,
					     void *offset);
int batadv_bla_backbone_dump(struct sk_buff *msg, struct netlink_callback *cb);
bool batadv_bla_is_backbone_gw_orig(struct batadv_priv *bat_priv, u8 *orig,
				    unsigned short vid);
bool batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv,
				    struct sk_buff *skb);
void batadv_bla_update_orig_address(struct batadv_priv *bat_priv,
				    struct batadv_hard_iface *primary_if,
				    struct batadv_hard_iface *oldif);
void batadv_bla_status_update(struct net_device *net_dev);
int batadv_bla_init(struct batadv_priv *bat_priv);
void batadv_bla_free(struct batadv_priv *bat_priv);
int batadv_bla_claim_dump(struct sk_buff *msg, struct netlink_callback *cb);
#ifdef CONFIG_BATMAN_ADV_DAT
bool batadv_bla_check_claim(struct batadv_priv *bat_priv, u8 *addr,
			    unsigned short vid);
#endif
#define BATADV_BLA_CRC_INIT	0
#else /* ifdef CONFIG_BATMAN_ADV_BLA */

static inline bool batadv_bla_rx(struct batadv_priv *bat_priv,
				 struct sk_buff *skb, unsigned short vid,
				 bool is_bcast)
{
	return false;
}

static inline bool batadv_bla_tx(struct batadv_priv *bat_priv,
				 struct sk_buff *skb, unsigned short vid)
{
	return false;
}

static inline bool batadv_bla_is_backbone_gw(struct sk_buff *skb,
					     struct batadv_orig_node *orig_node,
					     int hdr_size)
{
	return false;
}

static inline int batadv_bla_claim_table_seq_print_text(struct seq_file *seq,
							void *offset)
{
	return 0;
}

static inline int batadv_bla_backbone_table_seq_print_text(struct seq_file *seq,
							   void *offset)
{
	return 0;
}

static inline bool batadv_bla_is_backbone_gw_orig(struct batadv_priv *bat_priv,
						  u8 *orig, unsigned short vid)
{
	return false;
}

static inline bool
batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv,
			       struct sk_buff *skb)
{
	return false;
}

static inline void
batadv_bla_update_orig_address(struct batadv_priv *bat_priv,
			       struct batadv_hard_iface *primary_if,
			       struct batadv_hard_iface *oldif)
{
}

static inline int batadv_bla_init(struct batadv_priv *bat_priv)
{
	return 1;
}

static inline void batadv_bla_free(struct batadv_priv *bat_priv)
{
}

static inline int batadv_bla_claim_dump(struct sk_buff *msg,
					struct netlink_callback *cb)
{
	return -EOPNOTSUPP;
}

static inline int batadv_bla_backbone_dump(struct sk_buff *msg,
					   struct netlink_callback *cb)
{
	return -EOPNOTSUPP;
}

static inline
bool batadv_bla_check_claim(struct batadv_priv *bat_priv, u8 *addr,
			    unsigned short vid)
{
	return true;
}

#endif /* ifdef CONFIG_BATMAN_ADV_BLA */

#endif /* ifndef _NET_BATMAN_ADV_BLA_H_ */
Commit	Line	Data
7db7d9f3	1	/* SPDX-License-Identifier: GPL-2.0 */
68e039f9	2	/* Copyright (C) 2011-2020 B.A.T.M.A.N. contributors:
23721387 SW	3	*
23721387 SW	4	* Simon Wunderlich
23721387 SW	5	*/
	6
	7	#ifndef _NET_BATMAN_ADV_BLA_H_
	8	#define _NET_BATMAN_ADV_BLA_H_
	9
1e2c2a4f SE	10	#include "main.h"
1e2c2a4f SE	11
d3e9768a	12	#include <linux/compiler.h>
68a600de SE	13	#include <linux/netdevice.h>
	14	#include <linux/netlink.h>
	15	#include <linux/seq_file.h>
	16	#include <linux/skbuff.h>
d3e9768a	17	#include <linux/stddef.h>
1e2c2a4f SE	18	#include <linux/types.h>
1e2c2a4f SE	19
d3e9768a	20	/**
7e9a8c2c SE	21	* batadv_bla_is_loopdetect_mac() - check if the mac address is from a loop
7e9a8c2c SE	22	* detect frame sent by bridge loop avoidance
d3e9768a SW	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
7a5cc242	36	#ifdef CONFIG_BATMAN_ADV_BLA
4b426b10 SE	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);
08adf151	44	int batadv_bla_claim_table_seq_print_text(struct seq_file seq, void offset);
04f3f5bf	45	int batadv_bla_claim_dump(struct sk_buff msg, struct netlink_callback cb);
536a23f1 SW	46	int batadv_bla_backbone_table_seq_print_text(struct seq_file *seq,
536a23f1 SW	47	void *offset);
ea4152e1	48	int batadv_bla_backbone_dump(struct sk_buff msg, struct netlink_callback cb);
6b5e971a	49	bool batadv_bla_is_backbone_gw_orig(struct batadv_priv bat_priv, u8 orig,
cfd4f757	50	unsigned short vid);
4b426b10 SE	51	bool batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv,
4b426b10 SE	52	struct sk_buff *skb);
56303d34 SE	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);
d68081a2	56	void batadv_bla_status_update(struct net_device *net_dev);
56303d34 SE	57	int batadv_bla_init(struct batadv_priv *bat_priv);
56303d34 SE	58	void batadv_bla_free(struct batadv_priv *bat_priv);
04f3f5bf	59	int batadv_bla_claim_dump(struct sk_buff msg, struct netlink_callback cb);
00311de5 AP	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
3964f728	64	#define BATADV_BLA_CRC_INIT 0
7a5cc242 SW	65	#else /* ifdef CONFIG_BATMAN_ADV_BLA */
7a5cc242 SW	66
4b426b10 SE	67	static inline bool batadv_bla_rx(struct batadv_priv *bat_priv,
	68	struct sk_buff *skb, unsigned short vid,
	69	bool is_bcast)
7a5cc242	70	{
4b426b10	71	return false;
7a5cc242 SW	72	}
7a5cc242 SW	73
4b426b10 SE	74	static inline bool batadv_bla_tx(struct batadv_priv *bat_priv,
4b426b10 SE	75	struct sk_buff *skb, unsigned short vid)
7a5cc242	76	{
4b426b10	77	return false;
7a5cc242 SW	78	}
7a5cc242 SW	79
4b426b10 SE	80	static inline bool batadv_bla_is_backbone_gw(struct sk_buff *skb,
	81	struct batadv_orig_node *orig_node,
	82	int hdr_size)
7a5cc242	83	{
4b426b10	84	return false;
7a5cc242 SW	85	}
7a5cc242 SW	86
08adf151 SE	87	static inline int batadv_bla_claim_table_seq_print_text(struct seq_file *seq,
08adf151 SE	88	void *offset)
7a5cc242 SW	89	{
	90	return 0;
	91	}
	92
536a23f1 SW	93	static inline int batadv_bla_backbone_table_seq_print_text(struct seq_file *seq,
	94	void *offset)
	95	{
	96	return 0;
	97	}
	98
cfd4f757	99	static inline bool batadv_bla_is_backbone_gw_orig(struct batadv_priv *bat_priv,
6b5e971a	100	u8 *orig, unsigned short vid)
7a5cc242	101	{
cfd4f757	102	return false;
7a5cc242 SW	103	}
7a5cc242 SW	104
4b426b10	105	static inline bool
56303d34	106	batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv,
004e86fc	107	struct sk_buff *skb)
7a5cc242	108	{
4b426b10	109	return false;
7a5cc242 SW	110	}
7a5cc242 SW	111
08adf151	112	static inline void
56303d34 SE	113	batadv_bla_update_orig_address(struct batadv_priv *bat_priv,
	114	struct batadv_hard_iface *primary_if,
	115	struct batadv_hard_iface *oldif)
7a5cc242 SW	116	{
	117	}
	118
56303d34	119	static inline int batadv_bla_init(struct batadv_priv *bat_priv)
7a5cc242 SW	120	{
	121	return 1;
	122	}
	123
56303d34	124	static inline void batadv_bla_free(struct batadv_priv *bat_priv)
7a5cc242 SW	125	{
	126	}
	127
04f3f5bf AL	128	static inline int batadv_bla_claim_dump(struct sk_buff *msg,
	129	struct netlink_callback *cb)
	130	{
	131	return -EOPNOTSUPP;
	132	}
	133
ea4152e1 SW	134	static inline int batadv_bla_backbone_dump(struct sk_buff *msg,
	135	struct netlink_callback *cb)
	136	{
	137	return -EOPNOTSUPP;
	138	}
	139
00311de5 AP	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
7a5cc242	147	#endif /* ifdef CONFIG_BATMAN_ADV_BLA */
23721387 SW	148
23721387 SW	149	#endif /* ifndef _NET_BATMAN_ADV_BLA_H_ */