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/*
* Copyright (C) 2014 Fraunhofer ITWM
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* Written by:
* Phoebe Buckheister <phoebe.buckheister@itwm.fraunhofer.de>
*/
#ifndef MAC802154_LLSEC_H
#define MAC802154_LLSEC_H
#include <linux/slab.h>
#include <linux/hashtable.h>
#include <linux/crypto.h>
#include <linux/kref.h>
#include <linux/spinlock.h>
#include <net/af_ieee802154.h>
#include <net/ieee802154_netdev.h>
struct mac802154_llsec_key {
struct ieee802154_llsec_key key;
/* one tfm for each authsize (4/8/16) */
struct crypto_aead *tfm[3];
struct crypto_blkcipher *tfm0;
struct kref ref;
};
struct mac802154_llsec_device_key {
struct ieee802154_llsec_device_key devkey;
struct rcu_head rcu;
};
struct mac802154_llsec_device {
struct ieee802154_llsec_device dev;
struct hlist_node bucket_s;
struct hlist_node bucket_hw;
/* protects dev.frame_counter and the elements of dev.keys */
spinlock_t lock;
struct rcu_head rcu;
};
struct mac802154_llsec_seclevel {
struct ieee802154_llsec_seclevel level;
struct rcu_head rcu;
};
struct mac802154_llsec {
struct ieee802154_llsec_params params;
struct ieee802154_llsec_table table;
DECLARE_HASHTABLE(devices_short, 6);
DECLARE_HASHTABLE(devices_hw, 6);
/* protects params, all other fields are fine with RCU */
rwlock_t lock;
};
void mac802154_llsec_init(struct mac802154_llsec *sec);
void mac802154_llsec_destroy(struct mac802154_llsec *sec);
int mac802154_llsec_get_params(struct mac802154_llsec *sec,
struct ieee802154_llsec_params *params);
int mac802154_llsec_set_params(struct mac802154_llsec *sec,
const struct ieee802154_llsec_params *params,
int changed);
int mac802154_llsec_key_add(struct mac802154_llsec *sec,
const struct ieee802154_llsec_key_id *id,
const struct ieee802154_llsec_key *key);
int mac802154_llsec_key_del(struct mac802154_llsec *sec,
const struct ieee802154_llsec_key_id *key);
int mac802154_llsec_dev_add(struct mac802154_llsec *sec,
const struct ieee802154_llsec_device *dev);
int mac802154_llsec_dev_del(struct mac802154_llsec *sec,
__le64 device_addr);
int mac802154_llsec_devkey_add(struct mac802154_llsec *sec,
__le64 dev_addr,
const struct ieee802154_llsec_device_key *key);
int mac802154_llsec_devkey_del(struct mac802154_llsec *sec,
__le64 dev_addr,
const struct ieee802154_llsec_device_key *key);
int mac802154_llsec_seclevel_add(struct mac802154_llsec *sec,
const struct ieee802154_llsec_seclevel *sl);
int mac802154_llsec_seclevel_del(struct mac802154_llsec *sec,
const struct ieee802154_llsec_seclevel *sl);
int mac802154_llsec_encrypt(struct mac802154_llsec *sec, struct sk_buff *skb);
int mac802154_llsec_decrypt(struct mac802154_llsec *sec, struct sk_buff *skb);
#endif /* MAC802154_LLSEC_H */
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