net/batman-adv/bridge_loop_avoidance.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /* Copyright (C) 2011-2019  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/stddef.h>
  14 #include <linux/types.h>
  15
  16 struct net_device;
  17 struct netlink_callback;
  18 struct seq_file;
  19 struct sk_buff;
  20
  21 /**
  22  * batadv_bla_is_loopdetect_mac() - check if the mac address is from a loop
  23  *  detect frame sent by bridge loop avoidance
  24  * @mac: mac address to check
  25  *
  26  * Return: true if the it looks like a loop detect frame
  27  * (mac starts with BA:BE), false otherwise
  28  */
  29 static inline bool batadv_bla_is_loopdetect_mac(const uint8_t *mac)
  30 {
  31         if (mac[0] == 0xba && mac[1] == 0xbe)
  32                 return true;
  33
  34         return false;
  35 }
  36
  37 #ifdef CONFIG_BATMAN_ADV_BLA
  38 bool batadv_bla_rx(struct batadv_priv *bat_priv, struct sk_buff *skb,
  39                    unsigned short vid, bool is_bcast);
  40 bool batadv_bla_tx(struct batadv_priv *bat_priv, struct sk_buff *skb,
  41                    unsigned short vid);
  42 bool batadv_bla_is_backbone_gw(struct sk_buff *skb,
  43                                struct batadv_orig_node *orig_node,
  44                                int hdr_size);
  45 int batadv_bla_claim_table_seq_print_text(struct seq_file *seq, void *offset);
  46 int batadv_bla_claim_dump(struct sk_buff *msg, struct netlink_callback *cb);
  47 int batadv_bla_backbone_table_seq_print_text(struct seq_file *seq,
  48                                              void *offset);
  49 int batadv_bla_backbone_dump(struct sk_buff *msg, struct netlink_callback *cb);
  50 bool batadv_bla_is_backbone_gw_orig(struct batadv_priv *bat_priv, u8 *orig,
  51                                     unsigned short vid);
  52 bool batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv,
  53                                     struct sk_buff *skb);
  54 void batadv_bla_update_orig_address(struct batadv_priv *bat_priv,
  55                                     struct batadv_hard_iface *primary_if,
  56                                     struct batadv_hard_iface *oldif);
  57 void batadv_bla_status_update(struct net_device *net_dev);
  58 int batadv_bla_init(struct batadv_priv *bat_priv);
  59 void batadv_bla_free(struct batadv_priv *bat_priv);
  60 int batadv_bla_claim_dump(struct sk_buff *msg, struct netlink_callback *cb);
  61 #ifdef CONFIG_BATMAN_ADV_DAT
  62 bool batadv_bla_check_claim(struct batadv_priv *bat_priv, u8 *addr,
  63                             unsigned short vid);
  64 #endif
  65 #define BATADV_BLA_CRC_INIT     0
  66 #else /* ifdef CONFIG_BATMAN_ADV_BLA */
  67
  68 static inline bool batadv_bla_rx(struct batadv_priv *bat_priv,
  69                                  struct sk_buff *skb, unsigned short vid,
  70                                  bool is_bcast)
  71 {
  72         return false;
  73 }
  74
  75 static inline bool batadv_bla_tx(struct batadv_priv *bat_priv,
  76                                  struct sk_buff *skb, unsigned short vid)
  77 {
  78         return false;
  79 }
  80
  81 static inline bool batadv_bla_is_backbone_gw(struct sk_buff *skb,
  82                                              struct batadv_orig_node *orig_node,
  83                                              int hdr_size)
  84 {
  85         return false;
  86 }
  87
  88 static inline int batadv_bla_claim_table_seq_print_text(struct seq_file *seq,
  89                                                         void *offset)
  90 {
  91         return 0;
  92 }
  93
  94 static inline int batadv_bla_backbone_table_seq_print_text(struct seq_file *seq,
  95                                                            void *offset)
  96 {
  97         return 0;
  98 }
  99
 100 static inline bool batadv_bla_is_backbone_gw_orig(struct batadv_priv *bat_priv,
 101                                                   u8 *orig, unsigned short vid)
 102 {
 103         return false;
 104 }
 105
 106 static inline bool
 107 batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv,
 108                                struct sk_buff *skb)
 109 {
 110         return false;
 111 }
 112
 113 static inline void
 114 batadv_bla_update_orig_address(struct batadv_priv *bat_priv,
 115                                struct batadv_hard_iface *primary_if,
 116                                struct batadv_hard_iface *oldif)
 117 {
 118 }
 119
 120 static inline int batadv_bla_init(struct batadv_priv *bat_priv)
 121 {
 122         return 1;
 123 }
 124
 125 static inline void batadv_bla_free(struct batadv_priv *bat_priv)
 126 {
 127 }
 128
 129 static inline int batadv_bla_claim_dump(struct sk_buff *msg,
 130                                         struct netlink_callback *cb)
 131 {
 132         return -EOPNOTSUPP;
 133 }
 134
 135 static inline int batadv_bla_backbone_dump(struct sk_buff *msg,
 136                                            struct netlink_callback *cb)
 137 {
 138         return -EOPNOTSUPP;
 139 }
 140
 141 static inline
 142 bool batadv_bla_check_claim(struct batadv_priv *bat_priv, u8 *addr,
 143                             unsigned short vid)
 144 {
 145         return true;
 146 }
 147
 148 #endif /* ifdef CONFIG_BATMAN_ADV_BLA */
 149
 150 #endif /* ifndef _NET_BATMAN_ADV_BLA_H_ */