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 | |
26 | void batadv_dat_status_update(struct net_device *net_dev); |
27 | bool batadv_dat_snoop_outgoing_arp_request(struct batadv_priv *bat_priv, |
28 | struct sk_buff *skb); |
29 | bool batadv_dat_snoop_incoming_arp_request(struct batadv_priv *bat_priv, |
30 | struct sk_buff *skb, int hdr_size); |
31 | void batadv_dat_snoop_outgoing_arp_reply(struct batadv_priv *bat_priv, |
32 | struct sk_buff *skb); |
33 | bool batadv_dat_snoop_incoming_arp_reply(struct batadv_priv *bat_priv, |
34 | struct sk_buff *skb, int hdr_size); |
35 | void batadv_dat_snoop_outgoing_dhcp_ack(struct batadv_priv *bat_priv, |
36 | struct sk_buff *skb, |
37 | __be16 proto, |
38 | unsigned short vid); |
39 | void batadv_dat_snoop_incoming_dhcp_ack(struct batadv_priv *bat_priv, |
40 | struct sk_buff *skb, int hdr_size); |
41 | bool 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 | */ |
48 | static inline void |
49 | batadv_dat_init_orig_node_addr(struct batadv_orig_node *orig_node) |
50 | { |
51 | u32 addr; |
52 | |
53 | addr = batadv_choose_orig(data: 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 soft interface information |
60 | * @primary_if: a pointer to the primary interface |
61 | */ |
62 | static inline void |
63 | batadv_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(data: primary_if->net_dev->dev_addr, |
69 | BATADV_DAT_ADDR_MAX); |
70 | |
71 | bat_priv->dat.addr = (batadv_dat_addr_t)addr; |
72 | } |
73 | |
74 | int batadv_dat_init(struct batadv_priv *bat_priv); |
75 | void batadv_dat_free(struct batadv_priv *bat_priv); |
76 | int 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 soft 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 | */ |
85 | static 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 | |
102 | static inline void batadv_dat_status_update(struct net_device *net_dev) |
103 | { |
104 | } |
105 | |
106 | static inline bool |
107 | batadv_dat_snoop_outgoing_arp_request(struct batadv_priv *bat_priv, |
108 | struct sk_buff *skb) |
109 | { |
110 | return false; |
111 | } |
112 | |
113 | static inline bool |
114 | batadv_dat_snoop_incoming_arp_request(struct batadv_priv *bat_priv, |
115 | struct sk_buff *skb, int hdr_size) |
116 | { |
117 | return false; |
118 | } |
119 | |
120 | static inline bool |
121 | batadv_dat_snoop_outgoing_arp_reply(struct batadv_priv *bat_priv, |
122 | struct sk_buff *skb) |
123 | { |
124 | return false; |
125 | } |
126 | |
127 | static inline bool |
128 | batadv_dat_snoop_incoming_arp_reply(struct batadv_priv *bat_priv, |
129 | struct sk_buff *skb, int hdr_size) |
130 | { |
131 | return false; |
132 | } |
133 | |
134 | static inline void |
135 | batadv_dat_snoop_outgoing_dhcp_ack(struct batadv_priv *bat_priv, |
136 | struct sk_buff *skb, __be16 proto, |
137 | unsigned short vid) |
138 | { |
139 | } |
140 | |
141 | static inline void |
142 | batadv_dat_snoop_incoming_dhcp_ack(struct batadv_priv *bat_priv, |
143 | struct sk_buff *skb, int hdr_size) |
144 | { |
145 | } |
146 | |
147 | static inline bool |
148 | batadv_dat_drop_broadcast_packet(struct batadv_priv *bat_priv, |
149 | struct batadv_forw_packet *forw_packet) |
150 | { |
151 | return false; |
152 | } |
153 | |
154 | static inline void |
155 | batadv_dat_init_orig_node_addr(struct batadv_orig_node *orig_node) |
156 | { |
157 | } |
158 | |
159 | static inline void batadv_dat_init_own_addr(struct batadv_priv *bat_priv, |
160 | struct batadv_hard_iface *iface) |
161 | { |
162 | } |
163 | |
164 | static inline int batadv_dat_init(struct batadv_priv *bat_priv) |
165 | { |
166 | return 0; |
167 | } |
168 | |
169 | static inline void batadv_dat_free(struct batadv_priv *bat_priv) |
170 | { |
171 | } |
172 | |
173 | static inline int |
174 | batadv_dat_cache_dump(struct sk_buff *msg, struct netlink_callback *cb) |
175 | { |
176 | return -EOPNOTSUPP; |
177 | } |
178 | |
179 | static 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_ */ |
187 | |