LXR linux/net/mac802154/llsec.h

   1/* SPDX-License-Identifier: GPL-2.0-only */
   2/*
   3 * Copyright (C) 2014 Fraunhofer ITWM
   4 *
   5 * Written by:
   6 * Phoebe Buckheister <phoebe.buckheister@itwm.fraunhofer.de>
   7 */
   8
   9#ifndef MAC802154_LLSEC_H
  10#define MAC802154_LLSEC_H
  11
  12#include <linux/slab.h>
  13#include <linux/hashtable.h>
  14#include <linux/kref.h>
  15#include <linux/spinlock.h>
  16#include <net/af_ieee802154.h>
  17#include <net/ieee802154_netdev.h>
  18
  19struct mac802154_llsec_key {
  20        struct ieee802154_llsec_key key;
  21
  22        /* one tfm for each authsize (4/8/16) */
  23        struct crypto_aead *tfm[3];
  24        struct crypto_sync_skcipher *tfm0;
  25
  26        struct kref ref;
  27};
  28
  29struct mac802154_llsec_device_key {
  30        struct ieee802154_llsec_device_key devkey;
  31
  32        struct rcu_head rcu;
  33};
  34
  35struct mac802154_llsec_device {
  36        struct ieee802154_llsec_device dev;
  37
  38        struct hlist_node bucket_s;
  39        struct hlist_node bucket_hw;
  40
  41        /* protects dev.frame_counter and the elements of dev.keys */
  42        spinlock_t lock;
  43
  44        struct rcu_head rcu;
  45};
  46
  47struct mac802154_llsec_seclevel {
  48        struct ieee802154_llsec_seclevel level;
  49
  50        struct rcu_head rcu;
  51};
  52
  53struct mac802154_llsec {
  54        struct ieee802154_llsec_params params;
  55        struct ieee802154_llsec_table table;
  56
  57        DECLARE_HASHTABLE(devices_short, 6);
  58        DECLARE_HASHTABLE(devices_hw, 6);
  59
  60        /* protects params, all other fields are fine with RCU */
  61        rwlock_t lock;
  62};
  63
  64void mac802154_llsec_init(struct mac802154_llsec *sec);
  65void mac802154_llsec_destroy(struct mac802154_llsec *sec);
  66
  67int mac802154_llsec_get_params(struct mac802154_llsec *sec,
  68                               struct ieee802154_llsec_params *params);
  69int mac802154_llsec_set_params(struct mac802154_llsec *sec,
  70                               const struct ieee802154_llsec_params *params,
  71                               int changed);
  72
  73int mac802154_llsec_key_add(struct mac802154_llsec *sec,
  74                            const struct ieee802154_llsec_key_id *id,
  75                            const struct ieee802154_llsec_key *key);
  76int mac802154_llsec_key_del(struct mac802154_llsec *sec,
  77                            const struct ieee802154_llsec_key_id *key);
  78
  79int mac802154_llsec_dev_add(struct mac802154_llsec *sec,
  80                            const struct ieee802154_llsec_device *dev);
  81int mac802154_llsec_dev_del(struct mac802154_llsec *sec,
  82                            __le64 device_addr);
  83
  84int mac802154_llsec_devkey_add(struct mac802154_llsec *sec,
  85                               __le64 dev_addr,
  86                               const struct ieee802154_llsec_device_key *key);
  87int mac802154_llsec_devkey_del(struct mac802154_llsec *sec,
  88                               __le64 dev_addr,
  89                               const struct ieee802154_llsec_device_key *key);
  90
  91int mac802154_llsec_seclevel_add(struct mac802154_llsec *sec,
  92                                 const struct ieee802154_llsec_seclevel *sl);
  93int mac802154_llsec_seclevel_del(struct mac802154_llsec *sec,
  94                                 const struct ieee802154_llsec_seclevel *sl);
  95
  96int mac802154_llsec_encrypt(struct mac802154_llsec *sec, struct sk_buff *skb);
  97int mac802154_llsec_decrypt(struct mac802154_llsec *sec, struct sk_buff *skb);
  98
  99#endif /* MAC802154_LLSEC_H */
 100