text: /* 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, int packet_type);
  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,
  				 int packet_type)
  {
  	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_ */
  