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