1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* Copyright (C) 2011-2018 B.A.T.M.A.N. contributors: 3 * 4 * Antonio Quartulli 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_DISTRIBUTED_ARP_TABLE_H_ 20 #define _NET_BATMAN_ADV_DISTRIBUTED_ARP_TABLE_H_ 21 22 #include "main.h" 23 24 #include <linux/compiler.h> 25 #include <linux/netdevice.h> 26 #include <linux/types.h> 27 #include <uapi/linux/batadv_packet.h> 28 29 #include "originator.h" 30 31 struct netlink_callback; 32 struct seq_file; 33 struct sk_buff; 34 35 #ifdef CONFIG_BATMAN_ADV_DAT 36 37 /* BATADV_DAT_ADDR_MAX - maximum address value in the DHT space */ 38 #define BATADV_DAT_ADDR_MAX ((batadv_dat_addr_t)~(batadv_dat_addr_t)0) 39 40 void batadv_dat_status_update(struct net_device *net_dev); 41 bool batadv_dat_snoop_outgoing_arp_request(struct batadv_priv *bat_priv, 42 struct sk_buff *skb); 43 bool batadv_dat_snoop_incoming_arp_request(struct batadv_priv *bat_priv, 44 struct sk_buff *skb, int hdr_size); 45 void batadv_dat_snoop_outgoing_arp_reply(struct batadv_priv *bat_priv, 46 struct sk_buff *skb); 47 bool batadv_dat_snoop_incoming_arp_reply(struct batadv_priv *bat_priv, 48 struct sk_buff *skb, int hdr_size); 49 bool batadv_dat_drop_broadcast_packet(struct batadv_priv *bat_priv, 50 struct batadv_forw_packet *forw_packet); 51 52 /** 53 * batadv_dat_init_orig_node_addr() - assign a DAT address to the orig_node 54 * @orig_node: the node to assign the DAT address to 55 */ 56 static inline void 57 batadv_dat_init_orig_node_addr(struct batadv_orig_node *orig_node) 58 { 59 u32 addr; 60 61 addr = batadv_choose_orig(orig_node->orig, BATADV_DAT_ADDR_MAX); 62 orig_node->dat_addr = (batadv_dat_addr_t)addr; 63 } 64 65 /** 66 * batadv_dat_init_own_addr() - assign a DAT address to the node itself 67 * @bat_priv: the bat priv with all the soft interface information 68 * @primary_if: a pointer to the primary interface 69 */ 70 static inline void 71 batadv_dat_init_own_addr(struct batadv_priv *bat_priv, 72 struct batadv_hard_iface *primary_if) 73 { 74 u32 addr; 75 76 addr = batadv_choose_orig(primary_if->net_dev->dev_addr, 77 BATADV_DAT_ADDR_MAX); 78 79 bat_priv->dat.addr = (batadv_dat_addr_t)addr; 80 } 81 82 int batadv_dat_init(struct batadv_priv *bat_priv); 83 void batadv_dat_free(struct batadv_priv *bat_priv); 84 int batadv_dat_cache_seq_print_text(struct seq_file *seq, void *offset); 85 int batadv_dat_cache_dump(struct sk_buff *msg, struct netlink_callback *cb); 86 87 /** 88 * batadv_dat_inc_counter() - increment the correct DAT packet counter 89 * @bat_priv: the bat priv with all the soft interface information 90 * @subtype: the 4addr subtype of the packet to be counted 91 * 92 * Updates the ethtool statistics for the received packet if it is a DAT subtype 93 */ 94 static inline void batadv_dat_inc_counter(struct batadv_priv *bat_priv, 95 u8 subtype) 96 { 97 switch (subtype) { 98 case BATADV_P_DAT_DHT_GET: 99 batadv_inc_counter(bat_priv, 100 BATADV_CNT_DAT_GET_RX); 101 break; 102 case BATADV_P_DAT_DHT_PUT: 103 batadv_inc_counter(bat_priv, 104 BATADV_CNT_DAT_PUT_RX); 105 break; 106 } 107 } 108 109 #else 110 111 static inline void batadv_dat_status_update(struct net_device *net_dev) 112 { 113 } 114 115 static inline bool 116 batadv_dat_snoop_outgoing_arp_request(struct batadv_priv *bat_priv, 117 struct sk_buff *skb) 118 { 119 return false; 120 } 121 122 static inline bool 123 batadv_dat_snoop_incoming_arp_request(struct batadv_priv *bat_priv, 124 struct sk_buff *skb, int hdr_size) 125 { 126 return false; 127 } 128 129 static inline bool 130 batadv_dat_snoop_outgoing_arp_reply(struct batadv_priv *bat_priv, 131 struct sk_buff *skb) 132 { 133 return false; 134 } 135 136 static inline bool 137 batadv_dat_snoop_incoming_arp_reply(struct batadv_priv *bat_priv, 138 struct sk_buff *skb, int hdr_size) 139 { 140 return false; 141 } 142 143 static inline bool 144 batadv_dat_drop_broadcast_packet(struct batadv_priv *bat_priv, 145 struct batadv_forw_packet *forw_packet) 146 { 147 return false; 148 } 149 150 static inline void 151 batadv_dat_init_orig_node_addr(struct batadv_orig_node *orig_node) 152 { 153 } 154 155 static inline void batadv_dat_init_own_addr(struct batadv_priv *bat_priv, 156 struct batadv_hard_iface *iface) 157 { 158 } 159 160 static inline void batadv_arp_change_timeout(struct net_device *soft_iface, 161 const char *name) 162 { 163 } 164 165 static inline int batadv_dat_init(struct batadv_priv *bat_priv) 166 { 167 return 0; 168 } 169 170 static inline void batadv_dat_free(struct batadv_priv *bat_priv) 171 { 172 } 173 174 static inline int 175 batadv_dat_cache_dump(struct sk_buff *msg, struct netlink_callback *cb) 176 { 177 return -EOPNOTSUPP; 178 } 179 180 static inline void batadv_dat_inc_counter(struct batadv_priv *bat_priv, 181 u8 subtype) 182 { 183 } 184 185 #endif /* CONFIG_BATMAN_ADV_DAT */ 186 187 #endif /* _NET_BATMAN_ADV_DISTRIBUTED_ARP_TABLE_H_ */ 188