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_ */ 151