LXR linux/drivers/staging/rtl8192e/ieee80211/ieee80211

   1/*
   2 * Original code based on Host AP (software wireless LAN access point) driver
   3 * for Intersil Prism2/2.5/3.
   4 *
   5 * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
   6 * <jkmaline@cc.hut.fi>
   7 * Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi>
   8 *
   9 * Adaption to a generic IEEE 802.11 stack by James Ketrenos
  10 * <jketreno@linux.intel.com>
  11 *
  12 * Copyright (c) 2004, Intel Corporation
  13 *
  14 * This program is free software; you can redistribute it and/or modify
  15 * it under the terms of the GNU General Public License version 2 as
  16 * published by the Free Software Foundation. See README and COPYING for
  17 * more details.
  18 */
  19
  20/*
  21 * This file defines the interface to the ieee80211 crypto module.
  22 */
  23#ifndef IEEE80211_CRYPT_H
  24#define IEEE80211_CRYPT_H
  25
  26#include <linux/skbuff.h>
  27
  28struct ieee80211_crypto_ops {
  29        const char *name;
  30
  31        /* init new crypto context (e.g., allocate private data space,
  32         * select IV, etc.); returns NULL on failure or pointer to allocated
  33         * private data on success */
  34        void * (*init)(int keyidx);
  35
  36        /* deinitialize crypto context and free allocated private data */
  37        void (*deinit)(void *priv);
  38
  39        /* encrypt/decrypt return < 0 on error or >= 0 on success. The return
  40         * value from decrypt_mpdu is passed as the keyidx value for
  41         * decrypt_msdu. skb must have enough head and tail room for the
  42         * encryption; if not, error will be returned; these functions are
  43         * called for all MPDUs (i.e., fragments).
  44         */
  45        int (*encrypt_mpdu)(struct sk_buff *skb, int hdr_len, void *priv);
  46        int (*decrypt_mpdu)(struct sk_buff *skb, int hdr_len, void *priv);
  47
  48        /* These functions are called for full MSDUs, i.e. full frames.
  49         * These can be NULL if full MSDU operations are not needed. */
  50        int (*encrypt_msdu)(struct sk_buff *skb, int hdr_len, void *priv);
  51        int (*decrypt_msdu)(struct sk_buff *skb, int keyidx, int hdr_len,
  52                            void *priv);
  53
  54        int (*set_key)(void *key, int len, u8 *seq, void *priv);
  55        int (*get_key)(void *key, int len, u8 *seq, void *priv);
  56
  57        /* procfs handler for printing out key information and possible
  58         * statistics */
  59        char * (*print_stats)(char *p, void *priv);
  60
  61        /* maximum number of bytes added by encryption; encrypt buf is
  62         * allocated with extra_prefix_len bytes, copy of in_buf, and
  63         * extra_postfix_len; encrypt need not use all this space, but
  64         * the result must start at the beginning of the buffer and correct
  65         * length must be returned */
  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 *, int);
  82void ieee80211_crypt_deinit_handler(unsigned long);
  83void ieee80211_crypt_delayed_deinit(struct ieee80211_device *ieee,
  84                                    struct ieee80211_crypt_data **crypt);
  85#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
  86#define offset_in_page(p) ((unsigned long)(p) & ~PAGE_MASK)
  87#endif
  88#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,4,31))
  89#define crypto_alloc_tfm crypto_alloc_tfm_rsl
  90#define crypto_free_tfm crypto_free_tfm_rsl
  91#endif
  92
  93#endif
  94