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