LXR linux/net/batman-adv/bridge_loop

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/* Copyright (C) 2011-2019  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 */
  28static 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
  37bool batadv_bla_rx(struct batadv_priv *bat_priv, struct sk_buff *skb,
  38                   unsigned short vid, bool is_bcast);
  39bool batadv_bla_tx(struct batadv_priv *bat_priv, struct sk_buff *skb,
  40                   unsigned short vid);
  41bool batadv_bla_is_backbone_gw(struct sk_buff *skb,
  42                               struct batadv_orig_node *orig_node,
  43                               int hdr_size);
  44int batadv_bla_claim_table_seq_print_text(struct seq_file *seq, void *offset);
  45int batadv_bla_claim_dump(struct sk_buff *msg, struct netlink_callback *cb);
  46int batadv_bla_backbone_table_seq_print_text(struct seq_file *seq,
  47                                             void *offset);
  48int batadv_bla_backbone_dump(struct sk_buff *msg, struct netlink_callback *cb);
  49bool batadv_bla_is_backbone_gw_orig(struct batadv_priv *bat_priv, u8 *orig,
  50                                    unsigned short vid);
  51bool batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv,
  52                                    struct sk_buff *skb);
  53void batadv_bla_update_orig_address(struct batadv_priv *bat_priv,
  54                                    struct batadv_hard_iface *primary_if,
  55                                    struct batadv_hard_iface *oldif);
  56void batadv_bla_status_update(struct net_device *net_dev);
  57int batadv_bla_init(struct batadv_priv *bat_priv);
  58void batadv_bla_free(struct batadv_priv *bat_priv);
  59int batadv_bla_claim_dump(struct sk_buff *msg, struct netlink_callback *cb);
  60#ifdef CONFIG_BATMAN_ADV_DAT
  61bool 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
  67static 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
  74static inline bool batadv_bla_tx(struct batadv_priv *bat_priv,
  75                                 struct sk_buff *skb, unsigned short vid)
  76{
  77        return false;
  78}
  79
  80static 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
  87static inline int batadv_bla_claim_table_seq_print_text(struct seq_file *seq,
  88                                                        void *offset)
  89{
  90        return 0;
  91}
  92
  93static inline int batadv_bla_backbone_table_seq_print_text(struct seq_file *seq,
  94                                                           void *offset)
  95{
  96        return 0;
  97}
  98
  99static 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
 105static inline bool
 106batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv,
 107                               struct sk_buff *skb)
 108{
 109        return false;
 110}
 111
 112static inline void
 113batadv_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
 119static inline int batadv_bla_init(struct batadv_priv *bat_priv)
 120{
 121        return 1;
 122}
 123
 124static inline void batadv_bla_free(struct batadv_priv *bat_priv)
 125{
 126}
 127
 128static inline int batadv_bla_claim_dump(struct sk_buff *msg,
 129                                        struct netlink_callback *cb)
 130{
 131        return -EOPNOTSUPP;
 132}
 133
 134static inline int batadv_bla_backbone_dump(struct sk_buff *msg,
 135                                           struct netlink_callback *cb)
 136{
 137        return -EOPNOTSUPP;
 138}
 139
 140static inline
 141bool 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_ */
 150