bridge_loop_avoidance.h

  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 */
 27static 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
 36bool batadv_bla_rx(struct batadv_priv *bat_priv, struct sk_buff *skb,
 37		   unsigned short vid, int packet_type);
 38bool batadv_bla_tx(struct batadv_priv *bat_priv, struct sk_buff *skb,
 39		   unsigned short vid);
 40bool batadv_bla_is_backbone_gw(struct sk_buff *skb,
 41			       struct batadv_orig_node *orig_node,
 42			       int hdr_size);
 43int batadv_bla_claim_dump(struct sk_buff *msg, struct netlink_callback *cb);
 44int batadv_bla_backbone_dump(struct sk_buff *msg, struct netlink_callback *cb);
 45bool batadv_bla_is_backbone_gw_orig(struct batadv_priv *bat_priv, u8 *orig,
 46				    unsigned short vid);
 47bool batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv,
 48				    struct sk_buff *skb);
 49void batadv_bla_update_orig_address(struct batadv_priv *bat_priv,
 50				    struct batadv_hard_iface *primary_if,
 51				    struct batadv_hard_iface *oldif);
 52void batadv_bla_status_update(struct net_device *net_dev);
 53int batadv_bla_init(struct batadv_priv *bat_priv);
 54void batadv_bla_free(struct batadv_priv *bat_priv);
 55#ifdef CONFIG_BATMAN_ADV_DAT
 56bool 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
 62static 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
 69static inline bool batadv_bla_tx(struct batadv_priv *bat_priv,
 70				 struct sk_buff *skb, unsigned short vid)
 71{
 72	return false;
 73}
 74
 75static 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
 82static 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
 88static inline bool
 89batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv,
 90			       struct sk_buff *skb)
 91{
 92	return false;
 93}
 94
 95static inline void
 96batadv_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
102static inline int batadv_bla_init(struct batadv_priv *bat_priv)
103{
104	return 1;
105}
106
107static inline void batadv_bla_free(struct batadv_priv *bat_priv)
108{
109}
110
111static inline int batadv_bla_claim_dump(struct sk_buff *msg,
112					struct netlink_callback *cb)
113{
114	return -EOPNOTSUPP;
115}
116
117static inline int batadv_bla_backbone_dump(struct sk_buff *msg,
118					   struct netlink_callback *cb)
119{
120	return -EOPNOTSUPP;
121}
122
123static inline
124bool 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_ */