LXR linux/drivers/staging/rtl8192u/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         */
  35        void * (*init)(int keyidx);
  36
  37        /* deinitialize crypto context and free allocated private data */
  38        void (*deinit)(void *priv);
  39
  40        /* encrypt/decrypt return < 0 on error or >= 0 on success. The return
  41         * value from decrypt_mpdu is passed as the keyidx value for
  42         * decrypt_msdu. skb must have enough head and tail room for the
  43         * encryption; if not, error will be returned; these functions are
  44         * called for all MPDUs (i.e., fragments).
  45         */
  46        int (*encrypt_mpdu)(struct sk_buff *skb, int hdr_len, void *priv);
  47        int (*decrypt_mpdu)(struct sk_buff *skb, int hdr_len, void *priv);
  48
  49        /* These functions are called for full MSDUs, i.e. full frames.
  50         * These can be NULL if full MSDU operations are not needed.
  51         */
  52        int (*encrypt_msdu)(struct sk_buff *skb, int hdr_len, void *priv);
  53        int (*decrypt_msdu)(struct sk_buff *skb, int keyidx, int hdr_len,
  54                            void *priv);
  55
  56        int (*set_key)(void *key, int len, u8 *seq, void *priv);
  57        int (*get_key)(void *key, int len, u8 *seq, void *priv);
  58
  59        /* procfs handler for printing out key information and possible
  60         * statistics
  61         */
  62        char * (*print_stats)(char *p, void *priv);
  63
  64        /* maximum number of bytes added by encryption; encrypt buf is
  65         * allocated with extra_prefix_len bytes, copy of in_buf, and
  66         * extra_postfix_len; encrypt need not use all this space, but
  67         * the result must start at the beginning of the buffer and correct
  68         * length must be returned
  69         */
  70        int extra_prefix_len, extra_postfix_len;
  71
  72        struct module *owner;
  73};
  74
  75struct ieee80211_crypt_data {
  76        struct list_head list; /* delayed deletion list */
  77        struct ieee80211_crypto_ops *ops;
  78        void *priv;
  79        atomic_t refcnt;
  80};
  81
  82int ieee80211_register_crypto_ops(struct ieee80211_crypto_ops *ops);
  83int ieee80211_unregister_crypto_ops(struct ieee80211_crypto_ops *ops);
  84struct ieee80211_crypto_ops *ieee80211_get_crypto_ops(const char *name);
  85void ieee80211_crypt_deinit_entries(struct ieee80211_device *ieee, int force);
  86void ieee80211_crypt_deinit_handler(unsigned long data);
  87void ieee80211_crypt_delayed_deinit(struct ieee80211_device *ieee,
  88                                    struct ieee80211_crypt_data **crypt);
  89
  90#endif
  91