distributed-arp-table.h

  1/* SPDX-License-Identifier: GPL-2.0 */
  2/* Copyright (C) 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/skbuff.h>
 16#include <linux/types.h>
 17#include <uapi/linux/batadv_packet.h>
 18
 19#include "originator.h"
 20
 21#ifdef CONFIG_BATMAN_ADV_DAT
 22
 23/* BATADV_DAT_ADDR_MAX - maximum address value in the DHT space */
 24#define BATADV_DAT_ADDR_MAX ((batadv_dat_addr_t)~(batadv_dat_addr_t)0)
 25
 26void batadv_dat_status_update(struct net_device *net_dev);
 27bool batadv_dat_snoop_outgoing_arp_request(struct batadv_priv *bat_priv,
 28					   struct sk_buff *skb);
 29bool batadv_dat_snoop_incoming_arp_request(struct batadv_priv *bat_priv,
 30					   struct sk_buff *skb, int hdr_size);
 31void batadv_dat_snoop_outgoing_arp_reply(struct batadv_priv *bat_priv,
 32					 struct sk_buff *skb);
 33bool batadv_dat_snoop_incoming_arp_reply(struct batadv_priv *bat_priv,
 34					 struct sk_buff *skb, int hdr_size);
 35void batadv_dat_snoop_outgoing_dhcp_ack(struct batadv_priv *bat_priv,
 36					struct sk_buff *skb,
 37					__be16 proto,
 38					unsigned short vid);
 39void batadv_dat_snoop_incoming_dhcp_ack(struct batadv_priv *bat_priv,
 40					struct sk_buff *skb, int hdr_size);
 41bool 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 */
 48static inline void
 49batadv_dat_init_orig_node_addr(struct batadv_orig_node *orig_node)
 50{
 51	u32 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 mesh interface information
 60 * @primary_if: a pointer to the primary interface
 61 */
 62static inline void
 63batadv_dat_init_own_addr(struct batadv_priv *bat_priv,
 64			 struct batadv_hard_iface *primary_if)
 65{
 66	u32 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
 74int batadv_dat_init(struct batadv_priv *bat_priv);
 75void batadv_dat_free(struct batadv_priv *bat_priv);
 76int batadv_dat_cache_dump(struct sk_buff *msg, struct netlink_callback *cb);
 77
 78/**
 79 * batadv_dat_inc_counter() - increment the correct DAT packet counter
 80 * @bat_priv: the bat priv with all the mesh 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 */
 85static inline void batadv_dat_inc_counter(struct batadv_priv *bat_priv,
 86					  u8 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
102static inline void batadv_dat_status_update(struct net_device *net_dev)
103{
104}
105
106static inline bool
107batadv_dat_snoop_outgoing_arp_request(struct batadv_priv *bat_priv,
108				      struct sk_buff *skb)
109{
110	return false;
111}
112
113static inline bool
114batadv_dat_snoop_incoming_arp_request(struct batadv_priv *bat_priv,
115				      struct sk_buff *skb, int hdr_size)
116{
117	return false;
118}
119
120static inline bool
121batadv_dat_snoop_outgoing_arp_reply(struct batadv_priv *bat_priv,
122				    struct sk_buff *skb)
123{
124	return false;
125}
126
127static inline bool
128batadv_dat_snoop_incoming_arp_reply(struct batadv_priv *bat_priv,
129				    struct sk_buff *skb, int hdr_size)
130{
131	return false;
132}
133
134static inline void
135batadv_dat_snoop_outgoing_dhcp_ack(struct batadv_priv *bat_priv,
136				   struct sk_buff *skb, __be16 proto,
137				   unsigned short vid)
138{
139}
140
141static inline void
142batadv_dat_snoop_incoming_dhcp_ack(struct batadv_priv *bat_priv,
143				   struct sk_buff *skb, int hdr_size)
144{
145}
146
147static inline bool
148batadv_dat_drop_broadcast_packet(struct batadv_priv *bat_priv,
149				 struct batadv_forw_packet *forw_packet)
150{
151	return false;
152}
153
154static inline void
155batadv_dat_init_orig_node_addr(struct batadv_orig_node *orig_node)
156{
157}
158
159static inline void batadv_dat_init_own_addr(struct batadv_priv *bat_priv,
160					    struct batadv_hard_iface *iface)
161{
162}
163
164static inline int batadv_dat_init(struct batadv_priv *bat_priv)
165{
166	return 0;
167}
168
169static inline void batadv_dat_free(struct batadv_priv *bat_priv)
170{
171}
172
173static inline int
174batadv_dat_cache_dump(struct sk_buff *msg, struct netlink_callback *cb)
175{
176	return -EOPNOTSUPP;
177}
178
179static inline void batadv_dat_inc_counter(struct batadv_priv *bat_priv,
180					  u8 subtype)
181{
182}
183
184#endif /* CONFIG_BATMAN_ADV_DAT */
185
186#endif /* _NET_BATMAN_ADV_DISTRIBUTED_ARP_TABLE_H_ */