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