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 * 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 28 struct net_device; 29 struct netlink_callback; 30 struct seq_file; 31 struct 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 */ 41 static 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 50 bool batadv_bla_rx(struct batadv_priv *bat_priv, struct sk_buff *skb, 51 unsigned short vid, bool is_bcast); 52 bool batadv_bla_tx(struct batadv_priv *bat_priv, struct sk_buff *skb, 53 unsigned short vid); 54 bool batadv_bla_is_backbone_gw(struct sk_buff *skb, 55 struct batadv_orig_node *orig_node, 56 int hdr_size); 57 int batadv_bla_claim_table_seq_print_text(struct seq_file *seq, void *offset); 58 int batadv_bla_claim_dump(struct sk_buff *msg, struct netlink_callback *cb); 59 int batadv_bla_backbone_table_seq_print_text(struct seq_file *seq, 60 void *offset); 61 int batadv_bla_backbone_dump(struct sk_buff *msg, struct netlink_callback *cb); 62 bool batadv_bla_is_backbone_gw_orig(struct batadv_priv *bat_priv, u8 *orig, 63 unsigned short vid); 64 bool batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv, 65 struct sk_buff *skb); 66 void batadv_bla_update_orig_address(struct batadv_priv *bat_priv, 67 struct batadv_hard_iface *primary_if, 68 struct batadv_hard_iface *oldif); 69 void batadv_bla_status_update(struct net_device *net_dev); 70 int batadv_bla_init(struct batadv_priv *bat_priv); 71 void batadv_bla_free(struct batadv_priv *bat_priv); 72 int batadv_bla_claim_dump(struct sk_buff *msg, struct netlink_callback *cb); 73 #ifdef CONFIG_BATMAN_ADV_DAT 74 bool 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 80 static 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 87 static inline bool batadv_bla_tx(struct batadv_priv *bat_priv, 88 struct sk_buff *skb, unsigned short vid) 89 { 90 return false; 91 } 92 93 static 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 } 99 100 static inline int batadv_bla_claim_table_seq_print_text(struct seq_file *seq, 101 void *offset) 102 { 103 return 0; 104 } 105 106 static inline int batadv_bla_backbone_table_seq_print_text(struct seq_file *seq, 107 void *offset) 108 { 109 return 0; 110 } 111 112 static inline bool batadv_bla_is_backbone_gw_orig(struct batadv_priv *bat_priv, 113 u8 *orig, unsigned short vid) 114 { 115 return false; 116 } 117 118 static inline bool 119 batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv, 120 struct sk_buff *skb) 121 { 122 return false; 123 } 124 125 static inline void 126 batadv_bla_update_orig_address(struct batadv_priv *bat_priv, 127 struct batadv_hard_iface *primary_if, 128 struct batadv_hard_iface *oldif) 129 { 130 } 131 132 static inline int batadv_bla_init(struct batadv_priv *bat_priv) 133 { 134 return 1; 135 } 136 137 static inline void batadv_bla_free(struct batadv_priv *bat_priv) 138 { 139 } 140 141 static inline int batadv_bla_claim_dump(struct sk_buff *msg, 142 struct netlink_callback *cb) 143 { 144 return -EOPNOTSUPP; 145 } 146 147 static inline int batadv_bla_backbone_dump(struct sk_buff *msg, 148 struct netlink_callback *cb) 149 { 150 return -EOPNOTSUPP; 151 } 152 153 static inline 154 bool 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