net/batman-adv/bridge_loop_avoidance.h

   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  */
  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
  36 #ifdef CONFIG_BATMAN_ADV_BLA
  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);
  44 int batadv_bla_claim_table_seq_print_text(struct seq_file *seq, void *offset);
  45 int batadv_bla_claim_dump(struct sk_buff *msg, struct netlink_callback *cb);
  46 int batadv_bla_backbone_table_seq_print_text(struct seq_file *seq,
  47                                              void *offset);
  48 int batadv_bla_backbone_dump(struct sk_buff *msg, struct netlink_callback *cb);
  49 bool batadv_bla_is_backbone_gw_orig(struct batadv_priv *bat_priv, u8 *orig,
  50                                     unsigned short vid);
  51 bool batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv,
  52                                     struct sk_buff *skb);
  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);
  56 void batadv_bla_status_update(struct net_device *net_dev);
  57 int batadv_bla_init(struct batadv_priv *bat_priv);
  58 void batadv_bla_free(struct batadv_priv *bat_priv);
  59 int batadv_bla_claim_dump(struct sk_buff *msg, struct netlink_callback *cb);
  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
  64 #define BATADV_BLA_CRC_INIT     0
  65 #else /* ifdef CONFIG_BATMAN_ADV_BLA */
  66
  67 static inline bool batadv_bla_rx(struct batadv_priv *bat_priv,
  68                                  struct sk_buff *skb, unsigned short vid,
  69                                  bool is_bcast)
  70 {
  71         return false;
  72 }
  73
  74 static inline bool batadv_bla_tx(struct batadv_priv *bat_priv,
  75                                  struct sk_buff *skb, unsigned short vid)
  76 {
  77         return false;
  78 }
  79
  80 static 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
  87 static inline int batadv_bla_claim_table_seq_print_text(struct seq_file *seq,
  88                                                         void *offset)
  89 {
  90         return 0;
  91 }
  92
  93 static inline int batadv_bla_backbone_table_seq_print_text(struct seq_file *seq,
  94                                                            void *offset)
  95 {
  96         return 0;
  97 }
  98
  99 static 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
 105 static inline bool
 106 batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv,
 107                                struct sk_buff *skb)
 108 {
 109         return false;
 110 }
 111
 112 static inline void
 113 batadv_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
 119 static inline int batadv_bla_init(struct batadv_priv *bat_priv)
 120 {
 121         return 1;
 122 }
 123
 124 static inline void batadv_bla_free(struct batadv_priv *bat_priv)
 125 {
 126 }
 127
 128 static inline int batadv_bla_claim_dump(struct sk_buff *msg,
 129                                         struct netlink_callback *cb)
 130 {
 131         return -EOPNOTSUPP;
 132 }
 133
 134 static inline int batadv_bla_backbone_dump(struct sk_buff *msg,
 135                                            struct netlink_callback *cb)
 136 {
 137         return -EOPNOTSUPP;
 138 }
 139
 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
 147 #endif /* ifdef CONFIG_BATMAN_ADV_BLA */
 148
 149 #endif /* ifndef _NET_BATMAN_ADV_BLA_H_ */