1/* Copyright (C) 2011-2015 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#include "main.h"
22
23#include <linux/compiler.h>
24#include <linux/netdevice.h>
25#include <linux/types.h>
26
27#include "originator.h"
28#include "packet.h"
29
30struct seq_file;
31struct sk_buff;
32
33#ifdef CONFIG_BATMAN_ADV_DAT
34
35/* BATADV_DAT_ADDR_MAX - maximum address value in the DHT space */
36#define BATADV_DAT_ADDR_MAX ((batadv_dat_addr_t)~(batadv_dat_addr_t)0)
37
38void batadv_dat_status_update(struct net_device *net_dev);
39bool batadv_dat_snoop_outgoing_arp_request(struct batadv_priv *bat_priv,
40					   struct sk_buff *skb);
41bool batadv_dat_snoop_incoming_arp_request(struct batadv_priv *bat_priv,
42					   struct sk_buff *skb, int hdr_size);
43void batadv_dat_snoop_outgoing_arp_reply(struct batadv_priv *bat_priv,
44					 struct sk_buff *skb);
45bool batadv_dat_snoop_incoming_arp_reply(struct batadv_priv *bat_priv,
46					 struct sk_buff *skb, int hdr_size);
47bool batadv_dat_drop_broadcast_packet(struct batadv_priv *bat_priv,
48				      struct batadv_forw_packet *forw_packet);
49
50/**
51 * batadv_dat_init_orig_node_addr - assign a DAT address to the orig_node
52 * @orig_node: the node to assign the DAT address to
53 */
54static inline void
55batadv_dat_init_orig_node_addr(struct batadv_orig_node *orig_node)
56{
57	u32 addr;
58
59	addr = batadv_choose_orig(orig_node->orig, BATADV_DAT_ADDR_MAX);
60	orig_node->dat_addr = (batadv_dat_addr_t)addr;
61}
62
63/**
64 * batadv_dat_init_own_addr - assign a DAT address to the node itself
65 * @bat_priv: the bat priv with all the soft interface information
66 * @primary_if: a pointer to the primary interface
67 */
68static inline void
69batadv_dat_init_own_addr(struct batadv_priv *bat_priv,
70			 struct batadv_hard_iface *primary_if)
71{
72	u32 addr;
73
74	addr = batadv_choose_orig(primary_if->net_dev->dev_addr,
75				  BATADV_DAT_ADDR_MAX);
76
77	bat_priv->dat.addr = (batadv_dat_addr_t)addr;
78}
79
80int batadv_dat_init(struct batadv_priv *bat_priv);
81void batadv_dat_free(struct batadv_priv *bat_priv);
82int batadv_dat_cache_seq_print_text(struct seq_file *seq, void *offset);
83
84/**
85 * batadv_dat_inc_counter - increment the correct DAT packet counter
86 * @bat_priv: the bat priv with all the soft interface information
87 * @subtype: the 4addr subtype of the packet to be counted
88 *
89 * Updates the ethtool statistics for the received packet if it is a DAT subtype
90 */
91static inline void batadv_dat_inc_counter(struct batadv_priv *bat_priv,
92					  u8 subtype)
93{
94	switch (subtype) {
95	case BATADV_P_DAT_DHT_GET:
96		batadv_inc_counter(bat_priv,
97				   BATADV_CNT_DAT_GET_RX);
98		break;
99	case BATADV_P_DAT_DHT_PUT:
100		batadv_inc_counter(bat_priv,
101				   BATADV_CNT_DAT_PUT_RX);
102		break;
103	}
104}
105
106#else
107
108static inline void batadv_dat_status_update(struct net_device *net_dev)
109{
110}
111
112static inline bool
113batadv_dat_snoop_outgoing_arp_request(struct batadv_priv *bat_priv,
114				      struct sk_buff *skb)
115{
116	return false;
117}
118
119static inline bool
120batadv_dat_snoop_incoming_arp_request(struct batadv_priv *bat_priv,
121				      struct sk_buff *skb, int hdr_size)
122{
123	return false;
124}
125
126static inline bool
127batadv_dat_snoop_outgoing_arp_reply(struct batadv_priv *bat_priv,
128				    struct sk_buff *skb)
129{
130	return false;
131}
132
133static inline bool
134batadv_dat_snoop_incoming_arp_reply(struct batadv_priv *bat_priv,
135				    struct sk_buff *skb, int hdr_size)
136{
137	return false;
138}
139
140static inline bool
141batadv_dat_drop_broadcast_packet(struct batadv_priv *bat_priv,
142				 struct batadv_forw_packet *forw_packet)
143{
144	return false;
145}
146
147static inline void
148batadv_dat_init_orig_node_addr(struct batadv_orig_node *orig_node)
149{
150}
151
152static inline void batadv_dat_init_own_addr(struct batadv_priv *bat_priv,
153					    struct batadv_hard_iface *iface)
154{
155}
156
157static inline void batadv_arp_change_timeout(struct net_device *soft_iface,
158					     const char *name)
159{
160}
161
162static inline int batadv_dat_init(struct batadv_priv *bat_priv)
163{
164	return 0;
165}
166
167static inline void batadv_dat_free(struct batadv_priv *bat_priv)
168{
169}
170
171static inline void batadv_dat_inc_counter(struct batadv_priv *bat_priv,
172					  u8 subtype)
173{
174}
175
176#endif /* CONFIG_BATMAN_ADV_DAT */
177
178#endif /* _NET_BATMAN_ADV_DISTRIBUTED_ARP_TABLE_H_ */
179