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

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /* Copyright (C) 2011-2019  B.A.T.M.A.N. contributors:
   3  *
   4  * Antonio Quartulli
   5  */
   6
   7 #ifndef _NET_BATMAN_ADV_DISTRIBUTED_ARP_TABLE_H_
   8 #define _NET_BATMAN_ADV_DISTRIBUTED_ARP_TABLE_H_
   9
  10 #include "main.h"
  11
  12 #include <linux/compiler.h>
  13 #include <linux/netdevice.h>
  14 #include <linux/types.h>
  15 #include <uapi/linux/batadv_packet.h>
  16
  17 #include "originator.h"
  18
  19 struct netlink_callback;
  20 struct seq_file;
  21 struct sk_buff;
  22
  23 #ifdef CONFIG_BATMAN_ADV_DAT
  24
  25 /* BATADV_DAT_ADDR_MAX - maximum address value in the DHT space */
  26 #define BATADV_DAT_ADDR_MAX ((batadv_dat_addr_t)~(batadv_dat_addr_t)0)
  27
  28 void batadv_dat_status_update(struct net_device *net_dev);
  29 bool batadv_dat_snoop_outgoing_arp_request(struct batadv_priv *bat_priv,
  30                                            struct sk_buff *skb);
  31 bool batadv_dat_snoop_incoming_arp_request(struct batadv_priv *bat_priv,
  32                                            struct sk_buff *skb, int hdr_size);
  33 void batadv_dat_snoop_outgoing_arp_reply(struct batadv_priv *bat_priv,
  34                                          struct sk_buff *skb);
  35 bool batadv_dat_snoop_incoming_arp_reply(struct batadv_priv *bat_priv,
  36                                          struct sk_buff *skb, int hdr_size);
  37 void batadv_dat_snoop_outgoing_dhcp_ack(struct batadv_priv *bat_priv,
  38                                         struct sk_buff *skb,
  39                                         __be16 proto,
  40                                         unsigned short vid);
  41 void batadv_dat_snoop_incoming_dhcp_ack(struct batadv_priv *bat_priv,
  42                                         struct sk_buff *skb, int hdr_size);
  43 bool batadv_dat_drop_broadcast_packet(struct batadv_priv *bat_priv,
  44                                       struct batadv_forw_packet *forw_packet);
  45
  46 /**
  47  * batadv_dat_init_orig_node_addr() - assign a DAT address to the orig_node
  48  * @orig_node: the node to assign the DAT address to
  49  */
  50 static inline void
  51 batadv_dat_init_orig_node_addr(struct batadv_orig_node *orig_node)
  52 {
  53         u32 addr;
  54
  55         addr = batadv_choose_orig(orig_node->orig, BATADV_DAT_ADDR_MAX);
  56         orig_node->dat_addr = (batadv_dat_addr_t)addr;
  57 }
  58
  59 /**
  60  * batadv_dat_init_own_addr() - assign a DAT address to the node itself
  61  * @bat_priv: the bat priv with all the soft interface information
  62  * @primary_if: a pointer to the primary interface
  63  */
  64 static inline void
  65 batadv_dat_init_own_addr(struct batadv_priv *bat_priv,
  66                          struct batadv_hard_iface *primary_if)
  67 {
  68         u32 addr;
  69
  70         addr = batadv_choose_orig(primary_if->net_dev->dev_addr,
  71                                   BATADV_DAT_ADDR_MAX);
  72
  73         bat_priv->dat.addr = (batadv_dat_addr_t)addr;
  74 }
  75
  76 int batadv_dat_init(struct batadv_priv *bat_priv);
  77 void batadv_dat_free(struct batadv_priv *bat_priv);
  78 int batadv_dat_cache_seq_print_text(struct seq_file *seq, void *offset);
  79 int batadv_dat_cache_dump(struct sk_buff *msg, struct netlink_callback *cb);
  80
  81 /**
  82  * batadv_dat_inc_counter() - increment the correct DAT packet counter
  83  * @bat_priv: the bat priv with all the soft interface information
  84  * @subtype: the 4addr subtype of the packet to be counted
  85  *
  86  * Updates the ethtool statistics for the received packet if it is a DAT subtype
  87  */
  88 static inline void batadv_dat_inc_counter(struct batadv_priv *bat_priv,
  89                                           u8 subtype)
  90 {
  91         switch (subtype) {
  92         case BATADV_P_DAT_DHT_GET:
  93                 batadv_inc_counter(bat_priv,
  94                                    BATADV_CNT_DAT_GET_RX);
  95                 break;
  96         case BATADV_P_DAT_DHT_PUT:
  97                 batadv_inc_counter(bat_priv,
  98                                    BATADV_CNT_DAT_PUT_RX);
  99                 break;
 100         }
 101 }
 102
 103 #else
 104
 105 static inline void batadv_dat_status_update(struct net_device *net_dev)
 106 {
 107 }
 108
 109 static inline bool
 110 batadv_dat_snoop_outgoing_arp_request(struct batadv_priv *bat_priv,
 111                                       struct sk_buff *skb)
 112 {
 113         return false;
 114 }
 115
 116 static inline bool
 117 batadv_dat_snoop_incoming_arp_request(struct batadv_priv *bat_priv,
 118                                       struct sk_buff *skb, int hdr_size)
 119 {
 120         return false;
 121 }
 122
 123 static inline bool
 124 batadv_dat_snoop_outgoing_arp_reply(struct batadv_priv *bat_priv,
 125                                     struct sk_buff *skb)
 126 {
 127         return false;
 128 }
 129
 130 static inline bool
 131 batadv_dat_snoop_incoming_arp_reply(struct batadv_priv *bat_priv,
 132                                     struct sk_buff *skb, int hdr_size)
 133 {
 134         return false;
 135 }
 136
 137 static inline void
 138 batadv_dat_snoop_outgoing_dhcp_ack(struct batadv_priv *bat_priv,
 139                                    struct sk_buff *skb, __be16 proto,
 140                                    unsigned short vid)
 141 {
 142 }
 143
 144 static inline void
 145 batadv_dat_snoop_incoming_dhcp_ack(struct batadv_priv *bat_priv,
 146                                    struct sk_buff *skb, int hdr_size)
 147 {
 148 }
 149
 150 static inline bool
 151 batadv_dat_drop_broadcast_packet(struct batadv_priv *bat_priv,
 152                                  struct batadv_forw_packet *forw_packet)
 153 {
 154         return false;
 155 }
 156
 157 static inline void
 158 batadv_dat_init_orig_node_addr(struct batadv_orig_node *orig_node)
 159 {
 160 }
 161
 162 static inline void batadv_dat_init_own_addr(struct batadv_priv *bat_priv,
 163                                             struct batadv_hard_iface *iface)
 164 {
 165 }
 166
 167 static inline void batadv_arp_change_timeout(struct net_device *soft_iface,
 168                                              const char *name)
 169 {
 170 }
 171
 172 static inline int batadv_dat_init(struct batadv_priv *bat_priv)
 173 {
 174         return 0;
 175 }
 176
 177 static inline void batadv_dat_free(struct batadv_priv *bat_priv)
 178 {
 179 }
 180
 181 static inline int
 182 batadv_dat_cache_dump(struct sk_buff *msg, struct netlink_callback *cb)
 183 {
 184         return -EOPNOTSUPP;
 185 }
 186
 187 static inline void batadv_dat_inc_counter(struct batadv_priv *bat_priv,
 188                                           u8 subtype)
 189 {
 190 }
 191
 192 #endif /* CONFIG_BATMAN_ADV_DAT */
 193
 194 #endif /* _NET_BATMAN_ADV_DISTRIBUTED_ARP_TABLE_H_ */