LXR linux/net/batman-adv/bridge_loop

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/* Copyright (C) 2011-2018  B.A.T.M.A.N. contributors:
   3 *
   4 * Simon Wunderlich
   5 *
   6 * This program is free software; you can redistribute it and/or
   7 * modify it under the terms of version 2 of the GNU General Public
   8 * License as published by the Free Software Foundation.
   9 *
  10 * This program is distributed in the hope that it will be useful, but
  11 * WITHOUT ANY WARRANTY; without even the implied warranty of
  12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  13 * General Public License for more details.
  14 *
  15 * You should have received a copy of the GNU General Public License
  16 * along with this program; if not, see <http://www.gnu.org/licenses/>.
  17 */
  18
  19#ifndef _NET_BATMAN_ADV_BLA_H_
  20#define _NET_BATMAN_ADV_BLA_H_
  21
  22#include "main.h"
  23
  24#include <linux/compiler.h>
  25#include <linux/stddef.h>
  26#include <linux/types.h>
  27
  28struct net_device;
  29struct netlink_callback;
  30struct seq_file;
  31struct sk_buff;
  32
  33/**
  34 * batadv_bla_is_loopdetect_mac() - check if the mac address is from a loop
  35 *  detect frame sent by bridge loop avoidance
  36 * @mac: mac address to check
  37 *
  38 * Return: true if the it looks like a loop detect frame
  39 * (mac starts with BA:BE), false otherwise
  40 */
  41static inline bool batadv_bla_is_loopdetect_mac(const uint8_t *mac)
  42{
  43        if (mac[0] == 0xba && mac[1] == 0xbe)
  44                return true;
  45
  46        return false;
  47}
  48
  49#ifdef CONFIG_BATMAN_ADV_BLA
  50bool batadv_bla_rx(struct batadv_priv *bat_priv, struct sk_buff *skb,
  51                   unsigned short vid, bool is_bcast);
  52bool batadv_bla_tx(struct batadv_priv *bat_priv, struct sk_buff *skb,
  53                   unsigned short vid);
  54bool batadv_bla_is_backbone_gw(struct sk_buff *skb,
  55                               struct batadv_orig_node *orig_node,
  56                               int hdr_size);
  57int batadv_bla_claim_table_seq_print_text(struct seq_file *seq, void *offset);
  58int batadv_bla_claim_dump(struct sk_buff *msg, struct netlink_callback *cb);
  59int batadv_bla_backbone_table_seq_print_text(struct seq_file *seq,
  60                                             void *offset);
  61int batadv_bla_backbone_dump(struct sk_buff *msg, struct netlink_callback *cb);
  62bool batadv_bla_is_backbone_gw_orig(struct batadv_priv *bat_priv, u8 *orig,
  63                                    unsigned short vid);
  64bool batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv,
  65                                    struct sk_buff *skb);
  66void batadv_bla_update_orig_address(struct batadv_priv *bat_priv,
  67                                    struct batadv_hard_iface *primary_if,
  68                                    struct batadv_hard_iface *oldif);
  69void batadv_bla_status_update(struct net_device *net_dev);
  70int batadv_bla_init(struct batadv_priv *bat_priv);
  71void batadv_bla_free(struct batadv_priv *bat_priv);
  72int batadv_bla_claim_dump(struct sk_buff *msg, struct netlink_callback *cb);
  73#ifdef CONFIG_BATMAN_ADV_DAT
  74bool batadv_bla_check_claim(struct batadv_priv *bat_priv, u8 *addr,
  75                            unsigned short vid);
  76#endif
  77#define BATADV_BLA_CRC_INIT     0
  78#else /* ifdef CONFIG_BATMAN_ADV_BLA */
  79
  80static inline bool batadv_bla_rx(struct batadv_priv *bat_priv,
  81                                 struct sk_buff *skb, unsigned short vid,
  82                                 bool is_bcast)
  83{
  84        return false;
  85}
  86
  87static inline bool batadv_bla_tx(struct batadv_priv *bat_priv,
  88                                 struct sk_buff *skb, unsigned short vid)
  89{
  90        return false;
  91}
  92
  93static inline bool batadv_bla_is_backbone_gw(struct sk_buff *skb,
  94                                             struct batadv_orig_node *orig_node,
  95                                             int hdr_size)
  96{
  97        return false;
  98}
  99
 100static inline int batadv_bla_claim_table_seq_print_text(struct seq_file *seq,
 101                                                        void *offset)
 102{
 103        return 0;
 104}
 105
 106static inline int batadv_bla_backbone_table_seq_print_text(struct seq_file *seq,
 107                                                           void *offset)
 108{
 109        return 0;
 110}
 111
 112static inline bool batadv_bla_is_backbone_gw_orig(struct batadv_priv *bat_priv,
 113                                                  u8 *orig, unsigned short vid)
 114{
 115        return false;
 116}
 117
 118static inline bool
 119batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv,
 120                               struct sk_buff *skb)
 121{
 122        return false;
 123}
 124
 125static inline void
 126batadv_bla_update_orig_address(struct batadv_priv *bat_priv,
 127                               struct batadv_hard_iface *primary_if,
 128                               struct batadv_hard_iface *oldif)
 129{
 130}
 131
 132static inline int batadv_bla_init(struct batadv_priv *bat_priv)
 133{
 134        return 1;
 135}
 136
 137static inline void batadv_bla_free(struct batadv_priv *bat_priv)
 138{
 139}
 140
 141static inline int batadv_bla_claim_dump(struct sk_buff *msg,
 142                                        struct netlink_callback *cb)
 143{
 144        return -EOPNOTSUPP;
 145}
 146
 147static inline int batadv_bla_backbone_dump(struct sk_buff *msg,
 148                                           struct netlink_callback *cb)
 149{
 150        return -EOPNOTSUPP;
 151}
 152
 153static inline
 154bool batadv_bla_check_claim(struct batadv_priv *bat_priv, u8 *addr,
 155                            unsigned short vid)
 156{
 157        return true;
 158}
 159
 160#endif /* ifdef CONFIG_BATMAN_ADV_BLA */
 161
 162#endif /* ifndef _NET_BATMAN_ADV_BLA_H_ */
 163