net/batman-adv/distributed-arp-table.h

   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_ */