1 /* Copyright (C) 2011-2014 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 #ifdef CONFIG_BATMAN_ADV_DAT 22 23 #include "types.h" 24 #include "originator.h" 25 26 #include <linux/if_arp.h> 27 28 /** 29 * BATADV_DAT_ADDR_MAX - maximum address value in the DHT space 30 */ 31 #define BATADV_DAT_ADDR_MAX ((batadv_dat_addr_t)~(batadv_dat_addr_t)0) 32 33 void batadv_dat_status_update(struct net_device *net_dev); 34 bool batadv_dat_snoop_outgoing_arp_request(struct batadv_priv *bat_priv, 35 struct sk_buff *skb); 36 bool batadv_dat_snoop_incoming_arp_request(struct batadv_priv *bat_priv, 37 struct sk_buff *skb, int hdr_size); 38 void batadv_dat_snoop_outgoing_arp_reply(struct batadv_priv *bat_priv, 39 struct sk_buff *skb); 40 bool batadv_dat_snoop_incoming_arp_reply(struct batadv_priv *bat_priv, 41 struct sk_buff *skb, int hdr_size); 42 bool batadv_dat_drop_broadcast_packet(struct batadv_priv *bat_priv, 43 struct batadv_forw_packet *forw_packet); 44 45 /** 46 * batadv_dat_init_orig_node_addr - assign a DAT address to the orig_node 47 * @orig_node: the node to assign the DAT address to 48 */ 49 static inline void 50 batadv_dat_init_orig_node_addr(struct batadv_orig_node *orig_node) 51 { 52 uint32_t addr; 53 54 addr = batadv_choose_orig(orig_node->orig, BATADV_DAT_ADDR_MAX); 55 orig_node->dat_addr = (batadv_dat_addr_t)addr; 56 } 57 58 /** 59 * batadv_dat_init_own_addr - assign a DAT address to the node itself 60 * @bat_priv: the bat priv with all the soft interface information 61 * @primary_if: a pointer to the primary interface 62 */ 63 static inline void 64 batadv_dat_init_own_addr(struct batadv_priv *bat_priv, 65 struct batadv_hard_iface *primary_if) 66 { 67 uint32_t addr; 68 69 addr = batadv_choose_orig(primary_if->net_dev->dev_addr, 70 BATADV_DAT_ADDR_MAX); 71 72 bat_priv->dat.addr = (batadv_dat_addr_t)addr; 73 } 74 75 int batadv_dat_init(struct batadv_priv *bat_priv); 76 void batadv_dat_free(struct batadv_priv *bat_priv); 77 int batadv_dat_cache_seq_print_text(struct seq_file *seq, void *offset); 78 79 /** 80 * batadv_dat_inc_counter - increment the correct DAT packet counter 81 * @bat_priv: the bat priv with all the soft interface information 82 * @subtype: the 4addr subtype of the packet to be counted 83 * 84 * Updates the ethtool statistics for the received packet if it is a DAT subtype 85 */ 86 static inline void batadv_dat_inc_counter(struct batadv_priv *bat_priv, 87 uint8_t subtype) 88 { 89 switch (subtype) { 90 case BATADV_P_DAT_DHT_GET: 91 batadv_inc_counter(bat_priv, 92 BATADV_CNT_DAT_GET_RX); 93 break; 94 case BATADV_P_DAT_DHT_PUT: 95 batadv_inc_counter(bat_priv, 96 BATADV_CNT_DAT_PUT_RX); 97 break; 98 } 99 } 100 101 #else 102 103 static inline void batadv_dat_status_update(struct net_device *net_dev) 104 { 105 } 106 107 static inline bool 108 batadv_dat_snoop_outgoing_arp_request(struct batadv_priv *bat_priv, 109 struct sk_buff *skb) 110 { 111 return false; 112 } 113 114 static inline bool 115 batadv_dat_snoop_incoming_arp_request(struct batadv_priv *bat_priv, 116 struct sk_buff *skb, int hdr_size) 117 { 118 return false; 119 } 120 121 static inline bool 122 batadv_dat_snoop_outgoing_arp_reply(struct batadv_priv *bat_priv, 123 struct sk_buff *skb) 124 { 125 return false; 126 } 127 128 static inline bool 129 batadv_dat_snoop_incoming_arp_reply(struct batadv_priv *bat_priv, 130 struct sk_buff *skb, int hdr_size) 131 { 132 return false; 133 } 134 135 static inline bool 136 batadv_dat_drop_broadcast_packet(struct batadv_priv *bat_priv, 137 struct batadv_forw_packet *forw_packet) 138 { 139 return false; 140 } 141 142 static inline void 143 batadv_dat_init_orig_node_addr(struct batadv_orig_node *orig_node) 144 { 145 } 146 147 static inline void batadv_dat_init_own_addr(struct batadv_priv *bat_priv, 148 struct batadv_hard_iface *iface) 149 { 150 } 151 152 static inline void batadv_arp_change_timeout(struct net_device *soft_iface, 153 const char *name) 154 { 155 } 156 157 static inline int batadv_dat_init(struct batadv_priv *bat_priv) 158 { 159 return 0; 160 } 161 162 static inline void batadv_dat_free(struct batadv_priv *bat_priv) 163 { 164 } 165 166 static inline void batadv_dat_inc_counter(struct batadv_priv *bat_priv, 167 uint8_t subtype) 168 { 169 } 170 171 #endif /* CONFIG_BATMAN_ADV_DAT */ 172 173 #endif /* _NET_BATMAN_ADV_DISTRIBUTED_ARP_TABLE_H_ */ 174