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TOMOYO Linux Cross Reference
Linux/net/batman-adv/distributed-arp-table.h

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  1 /* SPDX-License-Identifier: GPL-2.0 */
  2 /* Copyright (C) 2011-2020  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
 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
 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  */
 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 
104 static inline void batadv_dat_status_update(struct net_device *net_dev)
105 {
106 }
107 
108 static inline bool
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
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
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
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
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
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
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
157 batadv_dat_init_orig_node_addr(struct batadv_orig_node *orig_node)
158 {
159 }
160 
161 static inline void batadv_dat_init_own_addr(struct batadv_priv *bat_priv,
162                                             struct batadv_hard_iface *iface)
163 {
164 }
165 
166 static inline int batadv_dat_init(struct batadv_priv *bat_priv)
167 {
168         return 0;
169 }
170 
171 static inline void batadv_dat_free(struct batadv_priv *bat_priv)
172 {
173 }
174 
175 static inline int
176 batadv_dat_cache_dump(struct sk_buff *msg, struct netlink_callback *cb)
177 {
178         return -EOPNOTSUPP;
179 }
180 
181 static inline void batadv_dat_inc_counter(struct batadv_priv *bat_priv,
182                                           u8 subtype)
183 {
184 }
185 
186 #endif /* CONFIG_BATMAN_ADV_DAT */
187 
188 #endif /* _NET_BATMAN_ADV_DISTRIBUTED_ARP_TABLE_H_ */
189 

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