1 /* Copyright (C) 2011-2017 B.A.T.M.A.N. contributors: 2 * 3 * Antonio Quartulli 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_DISTRIBUTED_ARP_TABLE_H_ 19 #define _NET_BATMAN_ADV_DISTRIBUTED_ARP_TABLE_H_ 20 21 #include "main.h" 22 23 #include <linux/compiler.h> 24 #include <linux/netdevice.h> 25 #include <linux/types.h> 26 27 #include "originator.h" 28 #include "packet.h" 29 30 struct seq_file; 31 struct sk_buff; 32 33 #ifdef CONFIG_BATMAN_ADV_DAT 34 35 /* BATADV_DAT_ADDR_MAX - maximum address value in the DHT space */ 36 #define BATADV_DAT_ADDR_MAX ((batadv_dat_addr_t)~(batadv_dat_addr_t)0) 37 38 void batadv_dat_status_update(struct net_device *net_dev); 39 bool batadv_dat_snoop_outgoing_arp_request(struct batadv_priv *bat_priv, 40 struct sk_buff *skb); 41 bool batadv_dat_snoop_incoming_arp_request(struct batadv_priv *bat_priv, 42 struct sk_buff *skb, int hdr_size); 43 void batadv_dat_snoop_outgoing_arp_reply(struct batadv_priv *bat_priv, 44 struct sk_buff *skb); 45 bool batadv_dat_snoop_incoming_arp_reply(struct batadv_priv *bat_priv, 46 struct sk_buff *skb, int hdr_size); 47 bool batadv_dat_drop_broadcast_packet(struct batadv_priv *bat_priv, 48 struct batadv_forw_packet *forw_packet); 49 50 /** 51 * batadv_dat_init_orig_node_addr - assign a DAT address to the orig_node 52 * @orig_node: the node to assign the DAT address to 53 */ 54 static inline void 55 batadv_dat_init_orig_node_addr(struct batadv_orig_node *orig_node) 56 { 57 u32 addr; 58 59 addr = batadv_choose_orig(orig_node->orig, BATADV_DAT_ADDR_MAX); 60 orig_node->dat_addr = (batadv_dat_addr_t)addr; 61 } 62 63 /** 64 * batadv_dat_init_own_addr - assign a DAT address to the node itself 65 * @bat_priv: the bat priv with all the soft interface information 66 * @primary_if: a pointer to the primary interface 67 */ 68 static inline void 69 batadv_dat_init_own_addr(struct batadv_priv *bat_priv, 70 struct batadv_hard_iface *primary_if) 71 { 72 u32 addr; 73 74 addr = batadv_choose_orig(primary_if->net_dev->dev_addr, 75 BATADV_DAT_ADDR_MAX); 76 77 bat_priv->dat.addr = (batadv_dat_addr_t)addr; 78 } 79 80 int batadv_dat_init(struct batadv_priv *bat_priv); 81 void batadv_dat_free(struct batadv_priv *bat_priv); 82 int batadv_dat_cache_seq_print_text(struct seq_file *seq, void *offset); 83 84 /** 85 * batadv_dat_inc_counter - increment the correct DAT packet counter 86 * @bat_priv: the bat priv with all the soft interface information 87 * @subtype: the 4addr subtype of the packet to be counted 88 * 89 * Updates the ethtool statistics for the received packet if it is a DAT subtype 90 */ 91 static inline void batadv_dat_inc_counter(struct batadv_priv *bat_priv, 92 u8 subtype) 93 { 94 switch (subtype) { 95 case BATADV_P_DAT_DHT_GET: 96 batadv_inc_counter(bat_priv, 97 BATADV_CNT_DAT_GET_RX); 98 break; 99 case BATADV_P_DAT_DHT_PUT: 100 batadv_inc_counter(bat_priv, 101 BATADV_CNT_DAT_PUT_RX); 102 break; 103 } 104 } 105 106 #else 107 108 static inline void batadv_dat_status_update(struct net_device *net_dev) 109 { 110 } 111 112 static inline bool 113 batadv_dat_snoop_outgoing_arp_request(struct batadv_priv *bat_priv, 114 struct sk_buff *skb) 115 { 116 return false; 117 } 118 119 static inline bool 120 batadv_dat_snoop_incoming_arp_request(struct batadv_priv *bat_priv, 121 struct sk_buff *skb, int hdr_size) 122 { 123 return false; 124 } 125 126 static inline bool 127 batadv_dat_snoop_outgoing_arp_reply(struct batadv_priv *bat_priv, 128 struct sk_buff *skb) 129 { 130 return false; 131 } 132 133 static inline bool 134 batadv_dat_snoop_incoming_arp_reply(struct batadv_priv *bat_priv, 135 struct sk_buff *skb, int hdr_size) 136 { 137 return false; 138 } 139 140 static inline bool 141 batadv_dat_drop_broadcast_packet(struct batadv_priv *bat_priv, 142 struct batadv_forw_packet *forw_packet) 143 { 144 return false; 145 } 146 147 static inline void 148 batadv_dat_init_orig_node_addr(struct batadv_orig_node *orig_node) 149 { 150 } 151 152 static inline void batadv_dat_init_own_addr(struct batadv_priv *bat_priv, 153 struct batadv_hard_iface *iface) 154 { 155 } 156 157 static inline void batadv_arp_change_timeout(struct net_device *soft_iface, 158 const char *name) 159 { 160 } 161 162 static inline int batadv_dat_init(struct batadv_priv *bat_priv) 163 { 164 return 0; 165 } 166 167 static inline void batadv_dat_free(struct batadv_priv *bat_priv) 168 { 169 } 170 171 static inline void batadv_dat_inc_counter(struct batadv_priv *bat_priv, 172 u8 subtype) 173 { 174 } 175 176 #endif /* CONFIG_BATMAN_ADV_DAT */ 177 178 #endif /* _NET_BATMAN_ADV_DISTRIBUTED_ARP_TABLE_H_ */ 179