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 #define BATADV_BLA_CRC_INIT     0
  73 #else /* ifdef CONFIG_BATMAN_ADV_BLA */
  74
  75 static inline bool batadv_bla_rx(struct batadv_priv *bat_priv,
  76                                  struct sk_buff *skb, unsigned short vid,
  77                                  bool is_bcast)
  78 {
  79         return false;
  80 }
  81
  82 static inline bool batadv_bla_tx(struct batadv_priv *bat_priv,
  83                                  struct sk_buff *skb, unsigned short vid)
  84 {
  85         return false;
  86 }
  87
  88 static inline bool batadv_bla_is_backbone_gw(struct sk_buff *skb,
  89                                              struct batadv_orig_node *orig_node,
  90                                              int hdr_size)
  91 {
  92         return false;
  93 }
  94
  95 static inline int batadv_bla_claim_table_seq_print_text(struct seq_file *seq,
  96                                                         void *offset)
  97 {
  98         return 0;
  99 }
 100
 101 static inline int batadv_bla_backbone_table_seq_print_text(struct seq_file *seq,
 102                                                            void *offset)
 103 {
 104         return 0;
 105 }
 106
 107 static inline bool batadv_bla_is_backbone_gw_orig(struct batadv_priv *bat_priv,
 108                                                   u8 *orig, unsigned short vid)
 109 {
 110         return false;
 111 }
 112
 113 static inline bool
 114 batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv,
 115                                struct sk_buff *skb)
 116 {
 117         return false;
 118 }
 119
 120 static inline void
 121 batadv_bla_update_orig_address(struct batadv_priv *bat_priv,
 122                                struct batadv_hard_iface *primary_if,
 123                                struct batadv_hard_iface *oldif)
 124 {
 125 }
 126
 127 static inline int batadv_bla_init(struct batadv_priv *bat_priv)
 128 {
 129         return 1;
 130 }
 131
 132 static inline void batadv_bla_free(struct batadv_priv *bat_priv)
 133 {
 134 }
 135
 136 static inline int batadv_bla_claim_dump(struct sk_buff *msg,
 137                                         struct netlink_callback *cb)
 138 {
 139         return -EOPNOTSUPP;
 140 }
 141
 142 static inline int batadv_bla_backbone_dump(struct sk_buff *msg,
 143                                            struct netlink_callback *cb)
 144 {
 145         return -EOPNOTSUPP;
 146 }
 147
 148 #endif /* ifdef CONFIG_BATMAN_ADV_BLA */
 149
 150 #endif /* ifndef _NET_BATMAN_ADV_BLA_H_ */