LXR linux/drivers/staging/rtl8192u/ieee80211/ieee80211

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/*
   3 * Original code based on Host AP (software wireless LAN access point) driver
   4 * for Intersil Prism2/2.5/3.
   5 *
   6 * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
   7 * <jkmaline@cc.hut.fi>
   8 * Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi>
   9 *
  10 * Adaption to a generic IEEE 802.11 stack by James Ketrenos
  11 * <jketreno@linux.intel.com>
  12 *
  13 * Copyright (c) 2004, Intel Corporation
  14 */
  15
  16/*
  17 * This file defines the interface to the ieee80211 crypto module.
  18 */
  19#ifndef IEEE80211_CRYPT_H
  20#define IEEE80211_CRYPT_H
  21
  22#include <linux/skbuff.h>
  23
  24struct ieee80211_crypto_ops {
  25        const char *name;
  26
  27        /* init new crypto context (e.g., allocate private data space,
  28         * select IV, etc.); returns NULL on failure or pointer to allocated
  29         * private data on success
  30         */
  31        void * (*init)(int keyidx);
  32
  33        /* deinitialize crypto context and free allocated private data */
  34        void (*deinit)(void *priv);
  35
  36        /* encrypt/decrypt return < 0 on error or >= 0 on success. The return
  37         * value from decrypt_mpdu is passed as the keyidx value for
  38         * decrypt_msdu. skb must have enough head and tail room for the
  39         * encryption; if not, error will be returned; these functions are
  40         * called for all MPDUs (i.e., fragments).
  41         */
  42        int (*encrypt_mpdu)(struct sk_buff *skb, int hdr_len, void *priv);
  43        int (*decrypt_mpdu)(struct sk_buff *skb, int hdr_len, void *priv);
  44
  45        /* These functions are called for full MSDUs, i.e. full frames.
  46         * These can be NULL if full MSDU operations are not needed.
  47         */
  48        int (*encrypt_msdu)(struct sk_buff *skb, int hdr_len, void *priv);
  49        int (*decrypt_msdu)(struct sk_buff *skb, int keyidx, int hdr_len,
  50                            void *priv);
  51
  52        int (*set_key)(void *key, int len, u8 *seq, void *priv);
  53        int (*get_key)(void *key, int len, u8 *seq, void *priv);
  54
  55        /* procfs handler for printing out key information and possible
  56         * statistics
  57         */
  58        char * (*print_stats)(char *p, void *priv);
  59
  60        /* maximum number of bytes added by encryption; encrypt buf is
  61         * allocated with extra_prefix_len bytes, copy of in_buf, and
  62         * extra_postfix_len; encrypt need not use all this space, but
  63         * the result must start at the beginning of the buffer and correct
  64         * length must be returned
  65         */
  66        int extra_prefix_len, extra_postfix_len;
  67
  68        struct module *owner;
  69};
  70
  71struct ieee80211_crypt_data {
  72        struct list_head list; /* delayed deletion list */
  73        struct ieee80211_crypto_ops *ops;
  74        void *priv;
  75        atomic_t refcnt;
  76};
  77
  78int ieee80211_register_crypto_ops(struct ieee80211_crypto_ops *ops);
  79int ieee80211_unregister_crypto_ops(struct ieee80211_crypto_ops *ops);
  80struct ieee80211_crypto_ops *ieee80211_get_crypto_ops(const char *name);
  81void ieee80211_crypt_deinit_entries(struct ieee80211_device *ieee, int force);
  82void ieee80211_crypt_deinit_handler(struct timer_list *t);
  83void ieee80211_crypt_delayed_deinit(struct ieee80211_device *ieee,
  84                                    struct ieee80211_crypt_data **crypt);
  85
  86#endif
  87