LXR linux/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
  27struct 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
  37struct mac802154_llsec_device_key {
  38        struct ieee802154_llsec_device_key devkey;
  39
  40        struct rcu_head rcu;
  41};
  42
  43struct 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
  55struct mac802154_llsec_seclevel {
  56        struct ieee802154_llsec_seclevel level;
  57
  58        struct rcu_head rcu;
  59};
  60
  61struct 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
  72void mac802154_llsec_init(struct mac802154_llsec *sec);
  73void mac802154_llsec_destroy(struct mac802154_llsec *sec);
  74
  75int mac802154_llsec_get_params(struct mac802154_llsec *sec,
  76                               struct ieee802154_llsec_params *params);
  77int mac802154_llsec_set_params(struct mac802154_llsec *sec,
  78                               const struct ieee802154_llsec_params *params,
  79                               int changed);
  80
  81int mac802154_llsec_key_add(struct mac802154_llsec *sec,
  82                            const struct ieee802154_llsec_key_id *id,
  83                            const struct ieee802154_llsec_key *key);
  84int mac802154_llsec_key_del(struct mac802154_llsec *sec,
  85                            const struct ieee802154_llsec_key_id *key);
  86
  87int mac802154_llsec_dev_add(struct mac802154_llsec *sec,
  88                            const struct ieee802154_llsec_device *dev);
  89int mac802154_llsec_dev_del(struct mac802154_llsec *sec,
  90                            __le64 device_addr);
  91
  92int mac802154_llsec_devkey_add(struct mac802154_llsec *sec,
  93                               __le64 dev_addr,
  94                               const struct ieee802154_llsec_device_key *key);
  95int mac802154_llsec_devkey_del(struct mac802154_llsec *sec,
  96                               __le64 dev_addr,
  97                               const struct ieee802154_llsec_device_key *key);
  98
  99int mac802154_llsec_seclevel_add(struct mac802154_llsec *sec,
 100                                 const struct ieee802154_llsec_seclevel *sl);
 101int mac802154_llsec_seclevel_del(struct mac802154_llsec *sec,
 102                                 const struct ieee802154_llsec_seclevel *sl);
 103
 104int mac802154_llsec_encrypt(struct mac802154_llsec *sec, struct sk_buff *skb);
 105int mac802154_llsec_decrypt(struct mac802154_llsec *sec, struct sk_buff *skb);
 106
 107#endif /* MAC802154_LLSEC_H */
 108