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