net/mac802154/llsec.h

   1 /*
   2  * Copyright (C) 2014 Fraunhofer ITWM
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2
   6  * as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * Written by:
  14  * Phoebe Buckheister <phoebe.buckheister@itwm.fraunhofer.de>
  15  */
  16
  17 #ifndef MAC802154_LLSEC_H
  18 #define MAC802154_LLSEC_H
  19
  20 #include <linux/slab.h>
  21 #include <linux/hashtable.h>
  22 #include <linux/kref.h>
  23 #include <linux/spinlock.h>
  24 #include <net/af_ieee802154.h>
  25 #include <net/ieee802154_netdev.h>
  26
  27 struct mac802154_llsec_key {
  28         struct ieee802154_llsec_key key;
  29
  30         /* one tfm for each authsize (4/8/16) */
  31         struct crypto_aead *tfm[3];
  32         struct crypto_skcipher *tfm0;
  33
  34         struct kref ref;
  35 };
  36
  37 struct mac802154_llsec_device_key {
  38         struct ieee802154_llsec_device_key devkey;
  39
  40         struct rcu_head rcu;
  41 };
  42
  43 struct mac802154_llsec_device {
  44         struct ieee802154_llsec_device dev;
  45
  46         struct hlist_node bucket_s;
  47         struct hlist_node bucket_hw;
  48
  49         /* protects dev.frame_counter and the elements of dev.keys */
  50         spinlock_t lock;
  51
  52         struct rcu_head rcu;
  53 };
  54
  55 struct mac802154_llsec_seclevel {
  56         struct ieee802154_llsec_seclevel level;
  57
  58         struct rcu_head rcu;
  59 };
  60
  61 struct mac802154_llsec {
  62         struct ieee802154_llsec_params params;
  63         struct ieee802154_llsec_table table;
  64
  65         DECLARE_HASHTABLE(devices_short, 6);
  66         DECLARE_HASHTABLE(devices_hw, 6);
  67
  68         /* protects params, all other fields are fine with RCU */
  69         rwlock_t lock;
  70 };
  71
  72 void mac802154_llsec_init(struct mac802154_llsec *sec);
  73 void mac802154_llsec_destroy(struct mac802154_llsec *sec);
  74
  75 int mac802154_llsec_get_params(struct mac802154_llsec *sec,
  76                                struct ieee802154_llsec_params *params);
  77 int mac802154_llsec_set_params(struct mac802154_llsec *sec,
  78                                const struct ieee802154_llsec_params *params,
  79                                int changed);
  80
  81 int mac802154_llsec_key_add(struct mac802154_llsec *sec,
  82                             const struct ieee802154_llsec_key_id *id,
  83                             const struct ieee802154_llsec_key *key);
  84 int mac802154_llsec_key_del(struct mac802154_llsec *sec,
  85                             const struct ieee802154_llsec_key_id *key);
  86
  87 int mac802154_llsec_dev_add(struct mac802154_llsec *sec,
  88                             const struct ieee802154_llsec_device *dev);
  89 int mac802154_llsec_dev_del(struct mac802154_llsec *sec,
  90                             __le64 device_addr);
  91
  92 int mac802154_llsec_devkey_add(struct mac802154_llsec *sec,
  93                                __le64 dev_addr,
  94                                const struct ieee802154_llsec_device_key *key);
  95 int mac802154_llsec_devkey_del(struct mac802154_llsec *sec,
  96                                __le64 dev_addr,
  97                                const struct ieee802154_llsec_device_key *key);
  98
  99 int mac802154_llsec_seclevel_add(struct mac802154_llsec *sec,
 100                                  const struct ieee802154_llsec_seclevel *sl);
 101 int mac802154_llsec_seclevel_del(struct mac802154_llsec *sec,
 102                                  const struct ieee802154_llsec_seclevel *sl);
 103
 104 int mac802154_llsec_encrypt(struct mac802154_llsec *sec, struct sk_buff *skb);
 105 int mac802154_llsec_decrypt(struct mac802154_llsec *sec, struct sk_buff *skb);
 106
 107 #endif /* MAC802154_LLSEC_H */