drivers/net/wireguard/peerlookup.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
   4  */
   5
   6 #ifndef _WG_PEERLOOKUP_H
   7 #define _WG_PEERLOOKUP_H
   8
   9 #include "messages.h"
  10
  11 #include <linux/hashtable.h>
  12 #include <linux/mutex.h>
  13 #include <linux/siphash.h>
  14
  15 struct wg_peer;
  16
  17 struct pubkey_hashtable {
  18         /* TODO: move to rhashtable */
  19         DECLARE_HASHTABLE(hashtable, 11);
  20         siphash_key_t key;
  21         struct mutex lock;
  22 };
  23
  24 struct pubkey_hashtable *wg_pubkey_hashtable_alloc(void);
  25 void wg_pubkey_hashtable_add(struct pubkey_hashtable *table,
  26                              struct wg_peer *peer);
  27 void wg_pubkey_hashtable_remove(struct pubkey_hashtable *table,
  28                                 struct wg_peer *peer);
  29 struct wg_peer *
  30 wg_pubkey_hashtable_lookup(struct pubkey_hashtable *table,
  31                            const u8 pubkey[NOISE_PUBLIC_KEY_LEN]);
  32
  33 struct index_hashtable {
  34         /* TODO: move to rhashtable */
  35         DECLARE_HASHTABLE(hashtable, 13);
  36         spinlock_t lock;
  37 };
  38
  39 enum index_hashtable_type {
  40         INDEX_HASHTABLE_HANDSHAKE = 1U << 0,
  41         INDEX_HASHTABLE_KEYPAIR = 1U << 1
  42 };
  43
  44 struct index_hashtable_entry {
  45         struct wg_peer *peer;
  46         struct hlist_node index_hash;
  47         enum index_hashtable_type type;
  48         __le32 index;
  49 };
  50
  51 struct index_hashtable *wg_index_hashtable_alloc(void);
  52 __le32 wg_index_hashtable_insert(struct index_hashtable *table,
  53                                  struct index_hashtable_entry *entry);
  54 bool wg_index_hashtable_replace(struct index_hashtable *table,
  55                                 struct index_hashtable_entry *old,
  56                                 struct index_hashtable_entry *new);
  57 void wg_index_hashtable_remove(struct index_hashtable *table,
  58                                struct index_hashtable_entry *entry);
  59 struct index_hashtable_entry *
  60 wg_index_hashtable_lookup(struct index_hashtable *table,
  61                           const enum index_hashtable_type type_mask,
  62                           const __le32 index, struct wg_peer **peer);
  63
  64 #endif /* _WG_PEERLOOKUP_H */