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Simon Wunderliche19f9752014-01-04 18:04:25 +01001/* Copyright (C) 2007-2014 B.A.T.M.A.N. contributors:
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +00002 *
3 * Marek Lindner, Simon Wunderlich
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
Antonio Quartulliebf38fb2013-11-03 20:40:48 +010015 * along with this program; if not, see <http://www.gnu.org/licenses/>.
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000016 */
17
18#ifndef _NET_BATMAN_ADV_ORIGINATOR_H_
19#define _NET_BATMAN_ADV_ORIGINATOR_H_
20
Marek Lindner7aadf882011-02-18 12:28:09 +000021#include "hash.h"
22
Antonio Quartullibbad0a52013-09-02 12:15:02 +020023int batadv_compare_orig(const struct hlist_node *node, const void *data2);
Sven Eckelmann56303d32012-06-05 22:31:31 +020024int batadv_originator_init(struct batadv_priv *bat_priv);
25void batadv_originator_free(struct batadv_priv *bat_priv);
26void batadv_purge_orig_ref(struct batadv_priv *bat_priv);
27void batadv_orig_node_free_ref(struct batadv_orig_node *orig_node);
Linus Lüssing72822222013-04-15 21:43:29 +080028void batadv_orig_node_free_ref_now(struct batadv_orig_node *orig_node);
Antonio Quartullibbad0a52013-09-02 12:15:02 +020029struct batadv_orig_node *batadv_orig_node_new(struct batadv_priv *bat_priv,
Sven Eckelmann56303d32012-06-05 22:31:31 +020030 const uint8_t *addr);
31struct batadv_neigh_node *
Antonio Quartulli08bf0ed2014-01-29 11:25:12 +010032batadv_neigh_node_get(const struct batadv_orig_node *orig_node,
33 const struct batadv_hard_iface *hard_iface,
34 const uint8_t *addr);
35struct batadv_neigh_node *
Sven Eckelmann56303d32012-06-05 22:31:31 +020036batadv_neigh_node_new(struct batadv_hard_iface *hard_iface,
Antonio Quartulli0538f752013-09-02 12:15:01 +020037 const uint8_t *neigh_addr,
38 struct batadv_orig_node *orig_node);
Sven Eckelmann56303d32012-06-05 22:31:31 +020039void batadv_neigh_node_free_ref(struct batadv_neigh_node *neigh_node);
40struct batadv_neigh_node *
Simon Wunderlich7351a4822013-11-13 19:14:47 +010041batadv_orig_router_get(struct batadv_orig_node *orig_node,
42 const struct batadv_hard_iface *if_outgoing);
Simon Wunderlich89652332013-11-13 19:14:46 +010043struct batadv_neigh_ifinfo *
44batadv_neigh_ifinfo_new(struct batadv_neigh_node *neigh,
45 struct batadv_hard_iface *if_outgoing);
46struct batadv_neigh_ifinfo *
47batadv_neigh_ifinfo_get(struct batadv_neigh_node *neigh,
48 struct batadv_hard_iface *if_outgoing);
49void batadv_neigh_ifinfo_free_ref(struct batadv_neigh_ifinfo *neigh_ifinfo);
Simon Wunderlich7351a4822013-11-13 19:14:47 +010050
51struct batadv_orig_ifinfo *
52batadv_orig_ifinfo_get(struct batadv_orig_node *orig_node,
53 struct batadv_hard_iface *if_outgoing);
54struct batadv_orig_ifinfo *
55batadv_orig_ifinfo_new(struct batadv_orig_node *orig_node,
56 struct batadv_hard_iface *if_outgoing);
57void batadv_orig_ifinfo_free_ref(struct batadv_orig_ifinfo *orig_ifinfo);
58
Sven Eckelmann7d211ef2012-05-12 02:09:34 +020059int batadv_orig_seq_print_text(struct seq_file *seq, void *offset);
Simon Wunderlichcb1c92e2013-11-21 11:52:16 +010060int batadv_orig_hardif_seq_print_text(struct seq_file *seq, void *offset);
Sven Eckelmann56303d32012-06-05 22:31:31 +020061int batadv_orig_hash_add_if(struct batadv_hard_iface *hard_iface,
62 int max_if_num);
63int batadv_orig_hash_del_if(struct batadv_hard_iface *hard_iface,
64 int max_if_num);
Antonio Quartulli7ea7b4a2013-07-30 22:16:25 +020065struct batadv_orig_node_vlan *
66batadv_orig_node_vlan_new(struct batadv_orig_node *orig_node,
67 unsigned short vid);
68struct batadv_orig_node_vlan *
69batadv_orig_node_vlan_get(struct batadv_orig_node *orig_node,
70 unsigned short vid);
71void batadv_orig_node_vlan_free_ref(struct batadv_orig_node_vlan *orig_vlan);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000072
Sven Eckelmann9cfc7bd2012-05-12 02:09:43 +020073/* hashfunction to choose an entry in a hash table of given size
74 * hash algorithm from http://en.wikipedia.org/wiki/Hash_table
75 */
Sven Eckelmannda641192012-05-12 13:48:56 +020076static inline uint32_t batadv_choose_orig(const void *data, uint32_t size)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000077{
Sven Eckelmann747e4222011-05-14 23:14:50 +020078 const unsigned char *key = data;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000079 uint32_t hash = 0;
80 size_t i;
81
82 for (i = 0; i < 6; i++) {
83 hash += key[i];
84 hash += (hash << 10);
85 hash ^= (hash >> 6);
86 }
87
88 hash += (hash << 3);
89 hash ^= (hash >> 11);
90 hash += (hash << 15);
91
92 return hash % size;
93}
94
Sven Eckelmann56303d32012-06-05 22:31:31 +020095static inline struct batadv_orig_node *
96batadv_orig_hash_find(struct batadv_priv *bat_priv, const void *data)
Marek Lindner7aadf882011-02-18 12:28:09 +000097{
Sven Eckelmann5bf74e92012-06-05 22:31:28 +020098 struct batadv_hashtable *hash = bat_priv->orig_hash;
Marek Lindner7aadf882011-02-18 12:28:09 +000099 struct hlist_head *head;
Sven Eckelmann56303d32012-06-05 22:31:31 +0200100 struct batadv_orig_node *orig_node, *orig_node_tmp = NULL;
Marek Lindner7aadf882011-02-18 12:28:09 +0000101 int index;
102
103 if (!hash)
104 return NULL;
105
Sven Eckelmannda641192012-05-12 13:48:56 +0200106 index = batadv_choose_orig(data, hash->size);
Marek Lindner7aadf882011-02-18 12:28:09 +0000107 head = &hash->table[index];
108
109 rcu_read_lock();
Sasha Levinb67bfe02013-02-27 17:06:00 -0800110 hlist_for_each_entry_rcu(orig_node, head, hash_entry) {
Sven Eckelmann1eda58b2012-05-12 13:48:58 +0200111 if (!batadv_compare_eth(orig_node, data))
Marek Lindner7aadf882011-02-18 12:28:09 +0000112 continue;
113
Marek Lindner7b36e8e2011-02-18 12:28:10 +0000114 if (!atomic_inc_not_zero(&orig_node->refcount))
115 continue;
116
Marek Lindner7aadf882011-02-18 12:28:09 +0000117 orig_node_tmp = orig_node;
Marek Lindner7aadf882011-02-18 12:28:09 +0000118 break;
119 }
120 rcu_read_unlock();
121
122 return orig_node_tmp;
123}
124
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000125#endif /* _NET_BATMAN_ADV_ORIGINATOR_H_ */