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

   1 /* Copyright (C) 2011-2013 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, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  17  * 02110-1301, USA
  18  */
  19
  20 #ifndef _NET_BATMAN_ADV_ARP_H_
  21 #define _NET_BATMAN_ADV_ARP_H_
  22
  23 #ifdef CONFIG_BATMAN_ADV_DAT
  24
  25 #include "types.h"
  26 #include "originator.h"
  27
  28 #include <linux/if_arp.h>
  29
  30 #define BATADV_DAT_ADDR_MAX ((batadv_dat_addr_t)~(batadv_dat_addr_t)0)
  31
  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 bool
 102 batadv_dat_snoop_outgoing_arp_request(struct batadv_priv *bat_priv,
 103                                       struct sk_buff *skb)
 104 {
 105         return false;
 106 }
 107
 108 static inline bool
 109 batadv_dat_snoop_incoming_arp_request(struct batadv_priv *bat_priv,
 110                                       struct sk_buff *skb, int hdr_size)
 111 {
 112         return false;
 113 }
 114
 115 static inline bool
 116 batadv_dat_snoop_outgoing_arp_reply(struct batadv_priv *bat_priv,
 117                                     struct sk_buff *skb)
 118 {
 119         return false;
 120 }
 121
 122 static inline bool
 123 batadv_dat_snoop_incoming_arp_reply(struct batadv_priv *bat_priv,
 124                                     struct sk_buff *skb, int hdr_size)
 125 {
 126         return false;
 127 }
 128
 129 static inline bool
 130 batadv_dat_drop_broadcast_packet(struct batadv_priv *bat_priv,
 131                                  struct batadv_forw_packet *forw_packet)
 132 {
 133         return false;
 134 }
 135
 136 static inline void
 137 batadv_dat_init_orig_node_addr(struct batadv_orig_node *orig_node)
 138 {
 139 }
 140
 141 static inline void batadv_dat_init_own_addr(struct batadv_priv *bat_priv,
 142                                             struct batadv_hard_iface *iface)
 143 {
 144 }
 145
 146 static inline void batadv_arp_change_timeout(struct net_device *soft_iface,
 147                                              const char *name)
 148 {
 149 }
 150
 151 static inline int batadv_dat_init(struct batadv_priv *bat_priv)
 152 {
 153         return 0;
 154 }
 155
 156 static inline void batadv_dat_free(struct batadv_priv *bat_priv)
 157 {
 158 }
 159
 160 static inline void batadv_dat_inc_counter(struct batadv_priv *bat_priv,
 161                                           uint8_t subtype)
 162 {
 163 }
 164
 165 #endif /* CONFIG_BATMAN_ADV_DAT */
 166
 167 #endif /* _NET_BATMAN_ADV_ARP_H_ */