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
27 void batadv_dat_status_update(struct net_device *net_dev);
28 bool batadv_dat_snoop_outgoing_arp_request(struct batadv_priv *bat_priv,
29 struct sk_buff *skb);
30 bool batadv_dat_snoop_incoming_arp_request(struct batadv_priv *bat_priv,
31 struct sk_buff *skb, int hdr_size);
32 void batadv_dat_snoop_outgoing_arp_reply(struct batadv_priv *bat_priv,
33 struct sk_buff *skb);
34 bool batadv_dat_snoop_incoming_arp_reply(struct batadv_priv *bat_priv,
35 struct sk_buff *skb, int hdr_size);
36 void batadv_dat_snoop_outgoing_dhcp_ack(struct batadv_priv *bat_priv,
37 struct sk_buff *skb,
38 __be16 proto,
39 unsigned short vid);
40 void batadv_dat_snoop_incoming_dhcp_ack(struct batadv_priv *bat_priv,
41 struct sk_buff *skb, int hdr_size);
42 bool 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 */
49 static inline void
batadv_dat_init_orig_node_addr(struct batadv_orig_node * orig_node)50 batadv_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 */
63 static inline void
batadv_dat_init_own_addr(struct batadv_priv * bat_priv,struct batadv_hard_iface * primary_if)64 batadv_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
75 int batadv_dat_init(struct batadv_priv *bat_priv);
76 void batadv_dat_free(struct batadv_priv *bat_priv);
77 int batadv_dat_cache_seq_print_text(struct seq_file *seq, void *offset);
78 int 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 */
batadv_dat_inc_counter(struct batadv_priv * bat_priv,u8 subtype)87 static 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
batadv_dat_status_update(struct net_device * net_dev)104 static inline void batadv_dat_status_update(struct net_device *net_dev)
105 {
106 }
107
108 static inline bool
batadv_dat_snoop_outgoing_arp_request(struct batadv_priv * bat_priv,struct sk_buff * skb)109 batadv_dat_snoop_outgoing_arp_request(struct batadv_priv *bat_priv,
110 struct sk_buff *skb)
111 {
112 return false;
113 }
114
115 static inline bool
batadv_dat_snoop_incoming_arp_request(struct batadv_priv * bat_priv,struct sk_buff * skb,int hdr_size)116 batadv_dat_snoop_incoming_arp_request(struct batadv_priv *bat_priv,
117 struct sk_buff *skb, int hdr_size)
118 {
119 return false;
120 }
121
122 static inline bool
batadv_dat_snoop_outgoing_arp_reply(struct batadv_priv * bat_priv,struct sk_buff * skb)123 batadv_dat_snoop_outgoing_arp_reply(struct batadv_priv *bat_priv,
124 struct sk_buff *skb)
125 {
126 return false;
127 }
128
129 static inline bool
batadv_dat_snoop_incoming_arp_reply(struct batadv_priv * bat_priv,struct sk_buff * skb,int hdr_size)130 batadv_dat_snoop_incoming_arp_reply(struct batadv_priv *bat_priv,
131 struct sk_buff *skb, int hdr_size)
132 {
133 return false;
134 }
135
136 static inline void
batadv_dat_snoop_outgoing_dhcp_ack(struct batadv_priv * bat_priv,struct sk_buff * skb,__be16 proto,unsigned short vid)137 batadv_dat_snoop_outgoing_dhcp_ack(struct batadv_priv *bat_priv,
138 struct sk_buff *skb, __be16 proto,
139 unsigned short vid)
140 {
141 }
142
143 static inline void
batadv_dat_snoop_incoming_dhcp_ack(struct batadv_priv * bat_priv,struct sk_buff * skb,int hdr_size)144 batadv_dat_snoop_incoming_dhcp_ack(struct batadv_priv *bat_priv,
145 struct sk_buff *skb, int hdr_size)
146 {
147 }
148
149 static inline bool
batadv_dat_drop_broadcast_packet(struct batadv_priv * bat_priv,struct batadv_forw_packet * forw_packet)150 batadv_dat_drop_broadcast_packet(struct batadv_priv *bat_priv,
151 struct batadv_forw_packet *forw_packet)
152 {
153 return false;
154 }
155
156 static inline void
batadv_dat_init_orig_node_addr(struct batadv_orig_node * orig_node)157 batadv_dat_init_orig_node_addr(struct batadv_orig_node *orig_node)
158 {
159 }
160
batadv_dat_init_own_addr(struct batadv_priv * bat_priv,struct batadv_hard_iface * iface)161 static inline void batadv_dat_init_own_addr(struct batadv_priv *bat_priv,
162 struct batadv_hard_iface *iface)
163 {
164 }
165
batadv_arp_change_timeout(struct net_device * soft_iface,const char * name)166 static inline void batadv_arp_change_timeout(struct net_device *soft_iface,
167 const char *name)
168 {
169 }
170
batadv_dat_init(struct batadv_priv * bat_priv)171 static inline int batadv_dat_init(struct batadv_priv *bat_priv)
172 {
173 return 0;
174 }
175
batadv_dat_free(struct batadv_priv * bat_priv)176 static inline void batadv_dat_free(struct batadv_priv *bat_priv)
177 {
178 }
179
180 static inline int
batadv_dat_cache_dump(struct sk_buff * msg,struct netlink_callback * cb)181 batadv_dat_cache_dump(struct sk_buff *msg, struct netlink_callback *cb)
182 {
183 return -EOPNOTSUPP;
184 }
185
batadv_dat_inc_counter(struct batadv_priv * bat_priv,u8 subtype)186 static 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