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 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 */ 28 static 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 37 bool batadv_bla_rx(struct batadv_priv *bat_priv, struct sk_buff *skb, 38 unsigned short vid, bool is_bcast); 39 bool batadv_bla_tx(struct batadv_priv *bat_priv, struct sk_buff *skb, 40 unsigned short vid); 41 bool batadv_bla_is_backbone_gw(struct sk_buff *skb, 42 struct batadv_orig_node *orig_node, 43 int hdr_size); 44 int batadv_bla_claim_table_seq_print_text(struct seq_file *seq, void *offset); 45 int batadv_bla_claim_dump(struct sk_buff *msg, struct netlink_callback *cb); 46 int batadv_bla_backbone_table_seq_print_text(struct seq_file *seq, 47 void *offset); 48 int batadv_bla_backbone_dump(struct sk_buff *msg, struct netlink_callback *cb); 49 bool batadv_bla_is_backbone_gw_orig(struct batadv_priv *bat_priv, u8 *orig, 50 unsigned short vid); 51 bool batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv, 52 struct sk_buff *skb); 53 void batadv_bla_update_orig_address(struct batadv_priv *bat_priv, 54 struct batadv_hard_iface *primary_if, 55 struct batadv_hard_iface *oldif); 56 void batadv_bla_status_update(struct net_device *net_dev); 57 int batadv_bla_init(struct batadv_priv *bat_priv); 58 void batadv_bla_free(struct batadv_priv *bat_priv); 59 int batadv_bla_claim_dump(struct sk_buff *msg, struct netlink_callback *cb); 60 #ifdef CONFIG_BATMAN_ADV_DAT 61 bool 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 67 static 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 74 static inline bool batadv_bla_tx(struct batadv_priv *bat_priv, 75 struct sk_buff *skb, unsigned short vid) 76 { 77 return false; 78 } 79 80 static 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 87 static inline int batadv_bla_claim_table_seq_print_text(struct seq_file *seq, 88 void *offset) 89 { 90 return 0; 91 } 92 93 static inline int batadv_bla_backbone_table_seq_print_text(struct seq_file *seq, 94 void *offset) 95 { 96 return 0; 97 } 98 99 static inline bool batadv_bla_is_backbone_gw_orig(struct batadv_priv *bat_priv, 100 u8 *orig, unsigned short vid) 101 { 102 return false; 103 } 104 105 static inline bool 106 batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv, 107 struct sk_buff *skb) 108 { 109 return false; 110 } 111 112 static inline void 113 batadv_bla_update_orig_address(struct batadv_priv *bat_priv, 114 struct batadv_hard_iface *primary_if, 115 struct batadv_hard_iface *oldif) 116 { 117 } 118 119 static inline int batadv_bla_init(struct batadv_priv *bat_priv) 120 { 121 return 1; 122 } 123 124 static inline void batadv_bla_free(struct batadv_priv *bat_priv) 125 { 126 } 127 128 static inline int batadv_bla_claim_dump(struct sk_buff *msg, 129 struct netlink_callback *cb) 130 { 131 return -EOPNOTSUPP; 132 } 133 134 static inline int batadv_bla_backbone_dump(struct sk_buff *msg, 135 struct netlink_callback *cb) 136 { 137 return -EOPNOTSUPP; 138 } 139 140 static inline 141 bool 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