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/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  */
  27 static 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
  36 bool batadv_bla_rx(struct batadv_priv *bat_priv, struct sk_buff *skb,
  37                    unsigned short vid, int packet_type);
  38 bool batadv_bla_tx(struct batadv_priv *bat_priv, struct sk_buff *skb,
  39                    unsigned short vid);
  40 bool batadv_bla_is_backbone_gw(struct sk_buff *skb,
  41                                struct batadv_orig_node *orig_node,
  42                                int hdr_size);
  43 int batadv_bla_claim_dump(struct sk_buff *msg, struct netlink_callback *cb);
  44 int batadv_bla_backbone_dump(struct sk_buff *msg, struct netlink_callback *cb);
  45 bool batadv_bla_is_backbone_gw_orig(struct batadv_priv *bat_priv, u8 *orig,
  46                                     unsigned short vid);
  47 bool batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv,
  48                                     struct sk_buff *skb);
  49 void batadv_bla_update_orig_address(struct batadv_priv *bat_priv,
  50                                     struct batadv_hard_iface *primary_if,
  51                                     struct batadv_hard_iface *oldif);
  52 void batadv_bla_status_update(struct net_device *net_dev);
  53 int batadv_bla_init(struct batadv_priv *bat_priv);
  54 void batadv_bla_free(struct batadv_priv *bat_priv);
  55 int batadv_bla_claim_dump(struct sk_buff *msg, struct netlink_callback *cb);
  56 #ifdef CONFIG_BATMAN_ADV_DAT
  57 bool batadv_bla_check_claim(struct batadv_priv *bat_priv, u8 *addr,
  58                             unsigned short vid);
  59 #endif
  60 #define BATADV_BLA_CRC_INIT     0
  61 #else /* ifdef CONFIG_BATMAN_ADV_BLA */
  62
  63 static inline bool batadv_bla_rx(struct batadv_priv *bat_priv,
  64                                  struct sk_buff *skb, unsigned short vid,
  65                                  int packet_type)
  66 {
  67         return false;
  68 }
  69
  70 static inline bool batadv_bla_tx(struct batadv_priv *bat_priv,
  71                                  struct sk_buff *skb, unsigned short vid)
  72 {
  73         return false;
  74 }
  75
  76 static inline bool batadv_bla_is_backbone_gw(struct sk_buff *skb,
  77                                              struct batadv_orig_node *orig_node,
  78                                              int hdr_size)
  79 {
  80         return false;
  81 }
  82
  83 static inline bool batadv_bla_is_backbone_gw_orig(struct batadv_priv *bat_priv,
  84                                                   u8 *orig, unsigned short vid)
  85 {
  86         return false;
  87 }
  88
  89 static inline bool
  90 batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv,
  91                                struct sk_buff *skb)
  92 {
  93         return false;
  94 }
  95
  96 static inline void
  97 batadv_bla_update_orig_address(struct batadv_priv *bat_priv,
  98                                struct batadv_hard_iface *primary_if,
  99                                struct batadv_hard_iface *oldif)
 100 {
 101 }
 102
 103 static inline int batadv_bla_init(struct batadv_priv *bat_priv)
 104 {
 105         return 1;
 106 }
 107
 108 static inline void batadv_bla_free(struct batadv_priv *bat_priv)
 109 {
 110 }
 111
 112 static inline int batadv_bla_claim_dump(struct sk_buff *msg,
 113                                         struct netlink_callback *cb)
 114 {
 115         return -EOPNOTSUPP;
 116 }
 117
 118 static inline int batadv_bla_backbone_dump(struct sk_buff *msg,
 119                                            struct netlink_callback *cb)
 120 {
 121         return -EOPNOTSUPP;
 122 }
 123
 124 static inline
 125 bool batadv_bla_check_claim(struct batadv_priv *bat_priv, u8 *addr,
 126                             unsigned short vid)
 127 {
 128         return true;
 129 }
 130
 131 #endif /* ifdef CONFIG_BATMAN_ADV_BLA */
 132
 133 #endif /* ifndef _NET_BATMAN_ADV_BLA_H_ */