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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) 2011-2018  B.A.T.M.A.N. contributors:
  3  *
  4  * Antonio Quartulli
  5  *
  6  * This program is free software; you can redistribute it and/or
  7  * modify it under the terms of version 2 of the GNU General Public
  8  * License as published by the Free Software Foundation.
  9  *
 10  * This program is distributed in the hope that it will be useful, but
 11  * WITHOUT ANY WARRANTY; without even the implied warranty of
 12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 13  * General Public License for more details.
 14  *
 15  * You should have received a copy of the GNU General Public License
 16  * along with this program; if not, see <http://www.gnu.org/licenses/>.
 17  */
 18 
 19 #ifndef _NET_BATMAN_ADV_DISTRIBUTED_ARP_TABLE_H_
 20 #define _NET_BATMAN_ADV_DISTRIBUTED_ARP_TABLE_H_
 21 
 22 #include "main.h"
 23 
 24 #include <linux/compiler.h>
 25 #include <linux/netdevice.h>
 26 #include <linux/types.h>
 27 #include <uapi/linux/batadv_packet.h>
 28 
 29 #include "originator.h"
 30 
 31 struct netlink_callback;
 32 struct seq_file;
 33 struct sk_buff;
 34 
 35 #ifdef CONFIG_BATMAN_ADV_DAT
 36 
 37 /* BATADV_DAT_ADDR_MAX - maximum address value in the DHT space */
 38 #define BATADV_DAT_ADDR_MAX ((batadv_dat_addr_t)~(batadv_dat_addr_t)0)
 39 
 40 void batadv_dat_status_update(struct net_device *net_dev);
 41 bool batadv_dat_snoop_outgoing_arp_request(struct batadv_priv *bat_priv,
 42                                            struct sk_buff *skb);
 43 bool batadv_dat_snoop_incoming_arp_request(struct batadv_priv *bat_priv,
 44                                            struct sk_buff *skb, int hdr_size);
 45 void batadv_dat_snoop_outgoing_arp_reply(struct batadv_priv *bat_priv,
 46                                          struct sk_buff *skb);
 47 bool batadv_dat_snoop_incoming_arp_reply(struct batadv_priv *bat_priv,
 48                                          struct sk_buff *skb, int hdr_size);
 49 bool batadv_dat_drop_broadcast_packet(struct batadv_priv *bat_priv,
 50                                       struct batadv_forw_packet *forw_packet);
 51 
 52 /**
 53  * batadv_dat_init_orig_node_addr() - assign a DAT address to the orig_node
 54  * @orig_node: the node to assign the DAT address to
 55  */
 56 static inline void
 57 batadv_dat_init_orig_node_addr(struct batadv_orig_node *orig_node)
 58 {
 59         u32 addr;
 60 
 61         addr = batadv_choose_orig(orig_node->orig, BATADV_DAT_ADDR_MAX);
 62         orig_node->dat_addr = (batadv_dat_addr_t)addr;
 63 }
 64 
 65 /**
 66  * batadv_dat_init_own_addr() - assign a DAT address to the node itself
 67  * @bat_priv: the bat priv with all the soft interface information
 68  * @primary_if: a pointer to the primary interface
 69  */
 70 static inline void
 71 batadv_dat_init_own_addr(struct batadv_priv *bat_priv,
 72                          struct batadv_hard_iface *primary_if)
 73 {
 74         u32 addr;
 75 
 76         addr = batadv_choose_orig(primary_if->net_dev->dev_addr,
 77                                   BATADV_DAT_ADDR_MAX);
 78 
 79         bat_priv->dat.addr = (batadv_dat_addr_t)addr;
 80 }
 81 
 82 int batadv_dat_init(struct batadv_priv *bat_priv);
 83 void batadv_dat_free(struct batadv_priv *bat_priv);
 84 int batadv_dat_cache_seq_print_text(struct seq_file *seq, void *offset);
 85 int batadv_dat_cache_dump(struct sk_buff *msg, struct netlink_callback *cb);
 86 
 87 /**
 88  * batadv_dat_inc_counter() - increment the correct DAT packet counter
 89  * @bat_priv: the bat priv with all the soft interface information
 90  * @subtype: the 4addr subtype of the packet to be counted
 91  *
 92  * Updates the ethtool statistics for the received packet if it is a DAT subtype
 93  */
 94 static inline void batadv_dat_inc_counter(struct batadv_priv *bat_priv,
 95                                           u8 subtype)
 96 {
 97         switch (subtype) {
 98         case BATADV_P_DAT_DHT_GET:
 99                 batadv_inc_counter(bat_priv,
100                                    BATADV_CNT_DAT_GET_RX);
101                 break;
102         case BATADV_P_DAT_DHT_PUT:
103                 batadv_inc_counter(bat_priv,
104                                    BATADV_CNT_DAT_PUT_RX);
105                 break;
106         }
107 }
108 
109 #else
110 
111 static inline void batadv_dat_status_update(struct net_device *net_dev)
112 {
113 }
114 
115 static inline bool
116 batadv_dat_snoop_outgoing_arp_request(struct batadv_priv *bat_priv,
117                                       struct sk_buff *skb)
118 {
119         return false;
120 }
121 
122 static inline bool
123 batadv_dat_snoop_incoming_arp_request(struct batadv_priv *bat_priv,
124                                       struct sk_buff *skb, int hdr_size)
125 {
126         return false;
127 }
128 
129 static inline bool
130 batadv_dat_snoop_outgoing_arp_reply(struct batadv_priv *bat_priv,
131                                     struct sk_buff *skb)
132 {
133         return false;
134 }
135 
136 static inline bool
137 batadv_dat_snoop_incoming_arp_reply(struct batadv_priv *bat_priv,
138                                     struct sk_buff *skb, int hdr_size)
139 {
140         return false;
141 }
142 
143 static inline bool
144 batadv_dat_drop_broadcast_packet(struct batadv_priv *bat_priv,
145                                  struct batadv_forw_packet *forw_packet)
146 {
147         return false;
148 }
149 
150 static inline void
151 batadv_dat_init_orig_node_addr(struct batadv_orig_node *orig_node)
152 {
153 }
154 
155 static inline void batadv_dat_init_own_addr(struct batadv_priv *bat_priv,
156                                             struct batadv_hard_iface *iface)
157 {
158 }
159 
160 static inline void batadv_arp_change_timeout(struct net_device *soft_iface,
161                                              const char *name)
162 {
163 }
164 
165 static inline int batadv_dat_init(struct batadv_priv *bat_priv)
166 {
167         return 0;
168 }
169 
170 static inline void batadv_dat_free(struct batadv_priv *bat_priv)
171 {
172 }
173 
174 static inline int
175 batadv_dat_cache_dump(struct sk_buff *msg, struct netlink_callback *cb)
176 {
177         return -EOPNOTSUPP;
178 }
179 
180 static inline void batadv_dat_inc_counter(struct batadv_priv *bat_priv,
181                                           u8 subtype)
182 {
183 }
184 
185 #endif /* CONFIG_BATMAN_ADV_DAT */
186 
187 #endif /* _NET_BATMAN_ADV_DISTRIBUTED_ARP_TABLE_H_ */
188 

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