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

   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_ */