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/crypto.h>
  23 #include <linux/kref.h>
  24 #include <linux/spinlock.h>
  25 #include <net/af_ieee802154.h>
  26 #include <net/ieee802154_netdev.h>
  27
  28 struct mac802154_llsec_key {
  29         struct ieee802154_llsec_key key;
  30
  31         /* one tfm for each authsize (4/8/16) */
  32         struct crypto_aead *tfm[3];
  33         struct crypto_blkcipher *tfm0;
  34
  35         struct kref ref;
  36 };
  37
  38 struct mac802154_llsec_device_key {
  39         struct ieee802154_llsec_device_key devkey;
  40
  41         struct rcu_head rcu;
  42 };
  43
  44 struct mac802154_llsec_device {
  45         struct ieee802154_llsec_device dev;
  46
  47         struct hlist_node bucket_s;
  48         struct hlist_node bucket_hw;
  49
  50         /* protects dev.frame_counter and the elements of dev.keys */
  51         spinlock_t lock;
  52
  53         struct rcu_head rcu;
  54 };
  55
  56 struct mac802154_llsec_seclevel {
  57         struct ieee802154_llsec_seclevel level;
  58
  59         struct rcu_head rcu;
  60 };
  61
  62 struct mac802154_llsec {
  63         struct ieee802154_llsec_params params;
  64         struct ieee802154_llsec_table table;
  65
  66         DECLARE_HASHTABLE(devices_short, 6);
  67         DECLARE_HASHTABLE(devices_hw, 6);
  68
  69         /* protects params, all other fields are fine with RCU */
  70         rwlock_t lock;
  71 };
  72
  73 void mac802154_llsec_init(struct mac802154_llsec *sec);
  74 void mac802154_llsec_destroy(struct mac802154_llsec *sec);
  75
  76 int mac802154_llsec_get_params(struct mac802154_llsec *sec,
  77                                struct ieee802154_llsec_params *params);
  78 int mac802154_llsec_set_params(struct mac802154_llsec *sec,
  79                                const struct ieee802154_llsec_params *params,
  80                                int changed);
  81
  82 int mac802154_llsec_key_add(struct mac802154_llsec *sec,
  83                             const struct ieee802154_llsec_key_id *id,
  84                             const struct ieee802154_llsec_key *key);
  85 int mac802154_llsec_key_del(struct mac802154_llsec *sec,
  86                             const struct ieee802154_llsec_key_id *key);
  87
  88 int mac802154_llsec_dev_add(struct mac802154_llsec *sec,
  89                             const struct ieee802154_llsec_device *dev);
  90 int mac802154_llsec_dev_del(struct mac802154_llsec *sec,
  91                             __le64 device_addr);
  92
  93 int mac802154_llsec_devkey_add(struct mac802154_llsec *sec,
  94                                __le64 dev_addr,
  95                                const struct ieee802154_llsec_device_key *key);
  96 int mac802154_llsec_devkey_del(struct mac802154_llsec *sec,
  97                                __le64 dev_addr,
  98                                const struct ieee802154_llsec_device_key *key);
  99
 100 int mac802154_llsec_seclevel_add(struct mac802154_llsec *sec,
 101                                  const struct ieee802154_llsec_seclevel *sl);
 102 int mac802154_llsec_seclevel_del(struct mac802154_llsec *sec,
 103                                  const struct ieee802154_llsec_seclevel *sl);
 104
 105 int mac802154_llsec_encrypt(struct mac802154_llsec *sec, struct sk_buff *skb);
 106 int mac802154_llsec_decrypt(struct mac802154_llsec *sec, struct sk_buff *skb);
 107
 108 #endif /* MAC802154_LLSEC_H */