bridge_loop_avoidance.h 3.9 KB

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  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. #ifndef _NET_BATMAN_ADV_BLA_H_
  7. #define _NET_BATMAN_ADV_BLA_H_
  8. #include "main.h"
  9. #include <linux/compiler.h>
  10. #include <linux/netdevice.h>
  11. #include <linux/netlink.h>
  12. #include <linux/seq_file.h>
  13. #include <linux/skbuff.h>
  14. #include <linux/stddef.h>
  15. #include <linux/types.h>
  16. /**
  17. * batadv_bla_is_loopdetect_mac() - check if the mac address is from a loop
  18. * detect frame sent by bridge loop avoidance
  19. * @mac: mac address to check
  20. *
  21. * Return: true if the it looks like a loop detect frame
  22. * (mac starts with BA:BE), false otherwise
  23. */
  24. static inline bool batadv_bla_is_loopdetect_mac(const uint8_t *mac)
  25. {
  26. if (mac[0] == 0xba && mac[1] == 0xbe)
  27. return true;
  28. return false;
  29. }
  30. #ifdef CONFIG_BATMAN_ADV_BLA
  31. bool batadv_bla_rx(struct batadv_priv *bat_priv, struct sk_buff *skb,
  32. unsigned short vid, int packet_type);
  33. bool batadv_bla_tx(struct batadv_priv *bat_priv, struct sk_buff *skb,
  34. unsigned short vid);
  35. bool batadv_bla_is_backbone_gw(struct sk_buff *skb,
  36. struct batadv_orig_node *orig_node,
  37. int hdr_size);
  38. int batadv_bla_claim_table_seq_print_text(struct seq_file *seq, void *offset);
  39. int batadv_bla_claim_dump(struct sk_buff *msg, struct netlink_callback *cb);
  40. int batadv_bla_backbone_table_seq_print_text(struct seq_file *seq,
  41. void *offset);
  42. int batadv_bla_backbone_dump(struct sk_buff *msg, struct netlink_callback *cb);
  43. bool batadv_bla_is_backbone_gw_orig(struct batadv_priv *bat_priv, u8 *orig,
  44. unsigned short vid);
  45. bool batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv,
  46. struct sk_buff *skb);
  47. void batadv_bla_update_orig_address(struct batadv_priv *bat_priv,
  48. struct batadv_hard_iface *primary_if,
  49. struct batadv_hard_iface *oldif);
  50. void batadv_bla_status_update(struct net_device *net_dev);
  51. int batadv_bla_init(struct batadv_priv *bat_priv);
  52. void batadv_bla_free(struct batadv_priv *bat_priv);
  53. int batadv_bla_claim_dump(struct sk_buff *msg, struct netlink_callback *cb);
  54. #ifdef CONFIG_BATMAN_ADV_DAT
  55. bool batadv_bla_check_claim(struct batadv_priv *bat_priv, u8 *addr,
  56. unsigned short vid);
  57. #endif
  58. #define BATADV_BLA_CRC_INIT 0
  59. #else /* ifdef CONFIG_BATMAN_ADV_BLA */
  60. static inline bool batadv_bla_rx(struct batadv_priv *bat_priv,
  61. struct sk_buff *skb, unsigned short vid,
  62. int packet_type)
  63. {
  64. return false;
  65. }
  66. static inline bool batadv_bla_tx(struct batadv_priv *bat_priv,
  67. struct sk_buff *skb, unsigned short vid)
  68. {
  69. return false;
  70. }
  71. static inline bool batadv_bla_is_backbone_gw(struct sk_buff *skb,
  72. struct batadv_orig_node *orig_node,
  73. int hdr_size)
  74. {
  75. return false;
  76. }
  77. static inline int batadv_bla_claim_table_seq_print_text(struct seq_file *seq,
  78. void *offset)
  79. {
  80. return 0;
  81. }
  82. static inline int batadv_bla_backbone_table_seq_print_text(struct seq_file *seq,
  83. void *offset)
  84. {
  85. return 0;
  86. }
  87. static inline bool batadv_bla_is_backbone_gw_orig(struct batadv_priv *bat_priv,
  88. u8 *orig, unsigned short vid)
  89. {
  90. return false;
  91. }
  92. static inline bool
  93. batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv,
  94. struct sk_buff *skb)
  95. {
  96. return false;
  97. }
  98. static inline void
  99. batadv_bla_update_orig_address(struct batadv_priv *bat_priv,
  100. struct batadv_hard_iface *primary_if,
  101. struct batadv_hard_iface *oldif)
  102. {
  103. }
  104. static inline int batadv_bla_init(struct batadv_priv *bat_priv)
  105. {
  106. return 1;
  107. }
  108. static inline void batadv_bla_free(struct batadv_priv *bat_priv)
  109. {
  110. }
  111. static inline int batadv_bla_claim_dump(struct sk_buff *msg,
  112. struct netlink_callback *cb)
  113. {
  114. return -EOPNOTSUPP;
  115. }
  116. static inline int batadv_bla_backbone_dump(struct sk_buff *msg,
  117. struct netlink_callback *cb)
  118. {
  119. return -EOPNOTSUPP;
  120. }
  121. static inline
  122. bool batadv_bla_check_claim(struct batadv_priv *bat_priv, u8 *addr,
  123. unsigned short vid)
  124. {
  125. return true;
  126. }
  127. #endif /* ifdef CONFIG_BATMAN_ADV_BLA */
  128. #endif /* ifndef _NET_BATMAN_ADV_BLA_H_ */