1/* Copyright (C) 2011-2014 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#ifdef CONFIG_BATMAN_ADV_DAT
22
23#include "types.h"
24#include "originator.h"
25
26#include <linux/if_arp.h>
27
28/* BATADV_DAT_ADDR_MAX - maximum address value in the DHT space */
29#define BATADV_DAT_ADDR_MAX ((batadv_dat_addr_t)~(batadv_dat_addr_t)0)
30
31void batadv_dat_status_update(struct net_device *net_dev);
32bool batadv_dat_snoop_outgoing_arp_request(struct batadv_priv *bat_priv,
33					   struct sk_buff *skb);
34bool batadv_dat_snoop_incoming_arp_request(struct batadv_priv *bat_priv,
35					   struct sk_buff *skb, int hdr_size);
36void batadv_dat_snoop_outgoing_arp_reply(struct batadv_priv *bat_priv,
37					 struct sk_buff *skb);
38bool batadv_dat_snoop_incoming_arp_reply(struct batadv_priv *bat_priv,
39					 struct sk_buff *skb, int hdr_size);
40bool batadv_dat_drop_broadcast_packet(struct batadv_priv *bat_priv,
41				      struct batadv_forw_packet *forw_packet);
42
43/**
44 * batadv_dat_init_orig_node_addr - assign a DAT address to the orig_node
45 * @orig_node: the node to assign the DAT address to
46 */
47static inline void
48batadv_dat_init_orig_node_addr(struct batadv_orig_node *orig_node)
49{
50	uint32_t addr;
51
52	addr = batadv_choose_orig(orig_node->orig, BATADV_DAT_ADDR_MAX);
53	orig_node->dat_addr = (batadv_dat_addr_t)addr;
54}
55
56/**
57 * batadv_dat_init_own_addr - assign a DAT address to the node itself
58 * @bat_priv: the bat priv with all the soft interface information
59 * @primary_if: a pointer to the primary interface
60 */
61static inline void
62batadv_dat_init_own_addr(struct batadv_priv *bat_priv,
63			 struct batadv_hard_iface *primary_if)
64{
65	uint32_t addr;
66
67	addr = batadv_choose_orig(primary_if->net_dev->dev_addr,
68				  BATADV_DAT_ADDR_MAX);
69
70	bat_priv->dat.addr = (batadv_dat_addr_t)addr;
71}
72
73int batadv_dat_init(struct batadv_priv *bat_priv);
74void batadv_dat_free(struct batadv_priv *bat_priv);
75int batadv_dat_cache_seq_print_text(struct seq_file *seq, void *offset);
76
77/**
78 * batadv_dat_inc_counter - increment the correct DAT packet counter
79 * @bat_priv: the bat priv with all the soft interface information
80 * @subtype: the 4addr subtype of the packet to be counted
81 *
82 * Updates the ethtool statistics for the received packet if it is a DAT subtype
83 */
84static inline void batadv_dat_inc_counter(struct batadv_priv *bat_priv,
85					  uint8_t subtype)
86{
87	switch (subtype) {
88	case BATADV_P_DAT_DHT_GET:
89		batadv_inc_counter(bat_priv,
90				   BATADV_CNT_DAT_GET_RX);
91		break;
92	case BATADV_P_DAT_DHT_PUT:
93		batadv_inc_counter(bat_priv,
94				   BATADV_CNT_DAT_PUT_RX);
95		break;
96	}
97}
98
99#else
100
101static inline void batadv_dat_status_update(struct net_device *net_dev)
102{
103}
104
105static inline bool
106batadv_dat_snoop_outgoing_arp_request(struct batadv_priv *bat_priv,
107				      struct sk_buff *skb)
108{
109	return false;
110}
111
112static inline bool
113batadv_dat_snoop_incoming_arp_request(struct batadv_priv *bat_priv,
114				      struct sk_buff *skb, int hdr_size)
115{
116	return false;
117}
118
119static inline bool
120batadv_dat_snoop_outgoing_arp_reply(struct batadv_priv *bat_priv,
121				    struct sk_buff *skb)
122{
123	return false;
124}
125
126static inline bool
127batadv_dat_snoop_incoming_arp_reply(struct batadv_priv *bat_priv,
128				    struct sk_buff *skb, int hdr_size)
129{
130	return false;
131}
132
133static inline bool
134batadv_dat_drop_broadcast_packet(struct batadv_priv *bat_priv,
135				 struct batadv_forw_packet *forw_packet)
136{
137	return false;
138}
139
140static inline void
141batadv_dat_init_orig_node_addr(struct batadv_orig_node *orig_node)
142{
143}
144
145static inline void batadv_dat_init_own_addr(struct batadv_priv *bat_priv,
146					    struct batadv_hard_iface *iface)
147{
148}
149
150static inline void batadv_arp_change_timeout(struct net_device *soft_iface,
151					     const char *name)
152{
153}
154
155static inline int batadv_dat_init(struct batadv_priv *bat_priv)
156{
157	return 0;
158}
159
160static inline void batadv_dat_free(struct batadv_priv *bat_priv)
161{
162}
163
164static inline void batadv_dat_inc_counter(struct batadv_priv *bat_priv,
165					  uint8_t subtype)
166{
167}
168
169#endif /* CONFIG_BATMAN_ADV_DAT */
170
171#endif /* _NET_BATMAN_ADV_DISTRIBUTED_ARP_TABLE_H_ */
172