net/batman-adv/bridge_loop_avoidance.h

   1 /* Copyright (C) 2011-2017  B.A.T.M.A.N. contributors:
   2  *
   3  * Simon Wunderlich
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of version 2 of the GNU General Public
   7  * License as published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  12  * General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #ifndef _NET_BATMAN_ADV_BLA_H_
  19 #define _NET_BATMAN_ADV_BLA_H_
  20
  21 #include "main.h"
  22
  23 #include <linux/compiler.h>
  24 #include <linux/stddef.h>
  25 #include <linux/types.h>
  26
  27 struct net_device;
  28 struct netlink_callback;
  29 struct seq_file;
  30 struct sk_buff;
  31
  32 /**
  33  * batadv_bla_is_loopdetect_mac - check if the mac address is from a loop detect
  34  *  frame sent by bridge loop avoidance
  35  * @mac: mac address to check
  36  *
  37  * Return: true if the it looks like a loop detect frame
  38  * (mac starts with BA:BE), false otherwise
  39  */
  40 static inline bool batadv_bla_is_loopdetect_mac(const uint8_t *mac)
  41 {
  42         if (mac[0] == 0xba && mac[1] == 0xbe)
  43                 return true;
  44
  45         return false;
  46 }
  47
  48 #ifdef CONFIG_BATMAN_ADV_BLA
  49 bool batadv_bla_rx(struct batadv_priv *bat_priv, struct sk_buff *skb,
  50                    unsigned short vid, bool is_bcast);
  51 bool batadv_bla_tx(struct batadv_priv *bat_priv, struct sk_buff *skb,
  52                    unsigned short vid);
  53 bool batadv_bla_is_backbone_gw(struct sk_buff *skb,
  54                                struct batadv_orig_node *orig_node,
  55                                int hdr_size);
  56 int batadv_bla_claim_table_seq_print_text(struct seq_file *seq, void *offset);
  57 int batadv_bla_claim_dump(struct sk_buff *msg, struct netlink_callback *cb);
  58 int batadv_bla_backbone_table_seq_print_text(struct seq_file *seq,
  59                                              void *offset);
  60 int batadv_bla_backbone_dump(struct sk_buff *msg, struct netlink_callback *cb);
  61 bool batadv_bla_is_backbone_gw_orig(struct batadv_priv *bat_priv, u8 *orig,
  62                                     unsigned short vid);
  63 bool batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv,
  64                                     struct sk_buff *skb);
  65 void batadv_bla_update_orig_address(struct batadv_priv *bat_priv,
  66                                     struct batadv_hard_iface *primary_if,
  67                                     struct batadv_hard_iface *oldif);
  68 void batadv_bla_status_update(struct net_device *net_dev);
  69 int batadv_bla_init(struct batadv_priv *bat_priv);
  70 void batadv_bla_free(struct batadv_priv *bat_priv);
  71 int batadv_bla_claim_dump(struct sk_buff *msg, struct netlink_callback *cb);
  72 #ifdef CONFIG_BATMAN_ADV_DAT
  73 bool batadv_bla_check_claim(struct batadv_priv *bat_priv, u8 *addr,
  74                             unsigned short vid);
  75 #endif
  76 #define BATADV_BLA_CRC_INIT     0
  77 #else /* ifdef CONFIG_BATMAN_ADV_BLA */
  78
  79 static inline bool batadv_bla_rx(struct batadv_priv *bat_priv,
  80                                  struct sk_buff *skb, unsigned short vid,
  81                                  bool is_bcast)
  82 {
  83         return false;
  84 }
  85
  86 static inline bool batadv_bla_tx(struct batadv_priv *bat_priv,
  87                                  struct sk_buff *skb, unsigned short vid)
  88 {
  89         return false;
  90 }
  91
  92 static inline bool batadv_bla_is_backbone_gw(struct sk_buff *skb,
  93                                              struct batadv_orig_node *orig_node,
  94                                              int hdr_size)
  95 {
  96         return false;
  97 }
  98
  99 static inline int batadv_bla_claim_table_seq_print_text(struct seq_file *seq,
 100                                                         void *offset)
 101 {
 102         return 0;
 103 }
 104
 105 static inline int batadv_bla_backbone_table_seq_print_text(struct seq_file *seq,
 106                                                            void *offset)
 107 {
 108         return 0;
 109 }
 110
 111 static inline bool batadv_bla_is_backbone_gw_orig(struct batadv_priv *bat_priv,
 112                                                   u8 *orig, unsigned short vid)
 113 {
 114         return false;
 115 }
 116
 117 static inline bool
 118 batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv,
 119                                struct sk_buff *skb)
 120 {
 121         return false;
 122 }
 123
 124 static inline void
 125 batadv_bla_update_orig_address(struct batadv_priv *bat_priv,
 126                                struct batadv_hard_iface *primary_if,
 127                                struct batadv_hard_iface *oldif)
 128 {
 129 }
 130
 131 static inline int batadv_bla_init(struct batadv_priv *bat_priv)
 132 {
 133         return 1;
 134 }
 135
 136 static inline void batadv_bla_free(struct batadv_priv *bat_priv)
 137 {
 138 }
 139
 140 static inline int batadv_bla_claim_dump(struct sk_buff *msg,
 141                                         struct netlink_callback *cb)
 142 {
 143         return -EOPNOTSUPP;
 144 }
 145
 146 static inline int batadv_bla_backbone_dump(struct sk_buff *msg,
 147                                            struct netlink_callback *cb)
 148 {
 149         return -EOPNOTSUPP;
 150 }
 151
 152 static inline
 153 bool batadv_bla_check_claim(struct batadv_priv *bat_priv, u8 *addr,
 154                             unsigned short vid)
 155 {
 156         return true;
 157 }
 158
 159 #endif /* ifdef CONFIG_BATMAN_ADV_BLA */
 160
 161 #endif /* ifndef _NET_BATMAN_ADV_BLA_H_ */