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

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /* Copyright (C) 2011-2017  B.A.T.M.A.N. contributors:
   3  *
   4  * Antonio Quartulli
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of version 2 of the GNU General Public
   8  * License as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #ifndef _NET_BATMAN_ADV_DISTRIBUTED_ARP_TABLE_H_
  20 #define _NET_BATMAN_ADV_DISTRIBUTED_ARP_TABLE_H_
  21
  22 #include "main.h"
  23
  24 #include <linux/compiler.h>
  25 #include <linux/netdevice.h>
  26 #include <linux/types.h>
  27 #include <uapi/linux/batadv_packet.h>
  28
  29 #include "originator.h"
  30
  31 struct seq_file;
  32 struct sk_buff;
  33
  34 #ifdef CONFIG_BATMAN_ADV_DAT
  35
  36 /* BATADV_DAT_ADDR_MAX - maximum address value in the DHT space */
  37 #define BATADV_DAT_ADDR_MAX ((batadv_dat_addr_t)~(batadv_dat_addr_t)0)
  38
  39 void batadv_dat_status_update(struct net_device *net_dev);
  40 bool batadv_dat_snoop_outgoing_arp_request(struct batadv_priv *bat_priv,
  41                                            struct sk_buff *skb);
  42 bool batadv_dat_snoop_incoming_arp_request(struct batadv_priv *bat_priv,
  43                                            struct sk_buff *skb, int hdr_size);
  44 void batadv_dat_snoop_outgoing_arp_reply(struct batadv_priv *bat_priv,
  45                                          struct sk_buff *skb);
  46 bool batadv_dat_snoop_incoming_arp_reply(struct batadv_priv *bat_priv,
  47                                          struct sk_buff *skb, int hdr_size);
  48 bool batadv_dat_drop_broadcast_packet(struct batadv_priv *bat_priv,
  49                                       struct batadv_forw_packet *forw_packet);
  50
  51 /**
  52  * batadv_dat_init_orig_node_addr() - assign a DAT address to the orig_node
  53  * @orig_node: the node to assign the DAT address to
  54  */
  55 static inline void
  56 batadv_dat_init_orig_node_addr(struct batadv_orig_node *orig_node)
  57 {
  58         u32 addr;
  59
  60         addr = batadv_choose_orig(orig_node->orig, BATADV_DAT_ADDR_MAX);
  61         orig_node->dat_addr = (batadv_dat_addr_t)addr;
  62 }
  63
  64 /**
  65  * batadv_dat_init_own_addr() - assign a DAT address to the node itself
  66  * @bat_priv: the bat priv with all the soft interface information
  67  * @primary_if: a pointer to the primary interface
  68  */
  69 static inline void
  70 batadv_dat_init_own_addr(struct batadv_priv *bat_priv,
  71                          struct batadv_hard_iface *primary_if)
  72 {
  73         u32 addr;
  74
  75         addr = batadv_choose_orig(primary_if->net_dev->dev_addr,
  76                                   BATADV_DAT_ADDR_MAX);
  77
  78         bat_priv->dat.addr = (batadv_dat_addr_t)addr;
  79 }
  80
  81 int batadv_dat_init(struct batadv_priv *bat_priv);
  82 void batadv_dat_free(struct batadv_priv *bat_priv);
  83 int batadv_dat_cache_seq_print_text(struct seq_file *seq, void *offset);
  84
  85 /**
  86  * batadv_dat_inc_counter() - increment the correct DAT packet counter
  87  * @bat_priv: the bat priv with all the soft interface information
  88  * @subtype: the 4addr subtype of the packet to be counted
  89  *
  90  * Updates the ethtool statistics for the received packet if it is a DAT subtype
  91  */
  92 static inline void batadv_dat_inc_counter(struct batadv_priv *bat_priv,
  93                                           u8 subtype)
  94 {
  95         switch (subtype) {
  96         case BATADV_P_DAT_DHT_GET:
  97                 batadv_inc_counter(bat_priv,
  98                                    BATADV_CNT_DAT_GET_RX);
  99                 break;
 100         case BATADV_P_DAT_DHT_PUT:
 101                 batadv_inc_counter(bat_priv,
 102                                    BATADV_CNT_DAT_PUT_RX);
 103                 break;
 104         }
 105 }
 106
 107 #else
 108
 109 static inline void batadv_dat_status_update(struct net_device *net_dev)
 110 {
 111 }
 112
 113 static inline bool
 114 batadv_dat_snoop_outgoing_arp_request(struct batadv_priv *bat_priv,
 115                                       struct sk_buff *skb)
 116 {
 117         return false;
 118 }
 119
 120 static inline bool
 121 batadv_dat_snoop_incoming_arp_request(struct batadv_priv *bat_priv,
 122                                       struct sk_buff *skb, int hdr_size)
 123 {
 124         return false;
 125 }
 126
 127 static inline bool
 128 batadv_dat_snoop_outgoing_arp_reply(struct batadv_priv *bat_priv,
 129                                     struct sk_buff *skb)
 130 {
 131         return false;
 132 }
 133
 134 static inline bool
 135 batadv_dat_snoop_incoming_arp_reply(struct batadv_priv *bat_priv,
 136                                     struct sk_buff *skb, int hdr_size)
 137 {
 138         return false;
 139 }
 140
 141 static inline bool
 142 batadv_dat_drop_broadcast_packet(struct batadv_priv *bat_priv,
 143                                  struct batadv_forw_packet *forw_packet)
 144 {
 145         return false;
 146 }
 147
 148 static inline void
 149 batadv_dat_init_orig_node_addr(struct batadv_orig_node *orig_node)
 150 {
 151 }
 152
 153 static inline void batadv_dat_init_own_addr(struct batadv_priv *bat_priv,
 154                                             struct batadv_hard_iface *iface)
 155 {
 156 }
 157
 158 static inline void batadv_arp_change_timeout(struct net_device *soft_iface,
 159                                              const char *name)
 160 {
 161 }
 162
 163 static inline int batadv_dat_init(struct batadv_priv *bat_priv)
 164 {
 165         return 0;
 166 }
 167
 168 static inline void batadv_dat_free(struct batadv_priv *bat_priv)
 169 {
 170 }
 171
 172 static inline void batadv_dat_inc_counter(struct batadv_priv *bat_priv,
 173                                           u8 subtype)
 174 {
 175 }
 176
 177 #endif /* CONFIG_BATMAN_ADV_DAT */
 178
 179 #endif /* _NET_BATMAN_ADV_DISTRIBUTED_ARP_TABLE_H_ */