2 * lib80211.h -- common bits for IEEE802.11 wireless drivers
4 * Copyright (c) 2008, John W. Linville <linville@tuxdriver.com>
6 * Some bits copied from old ieee80211 component, w/ original copyright
9 * Original code based on Host AP (software wireless LAN access point) driver
10 * for Intersil Prism2/2.5/3.
12 * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
14 * Copyright (c) 2002-2003, Jouni Malinen <j@w1.fi>
16 * Adaption to a generic IEEE 802.11 stack by James Ketrenos
17 * <jketreno@linux.intel.com>
19 * Copyright (c) 2004, Intel Corporation
26 #include <linux/types.h>
27 #include <linux/list.h>
28 #include <linux/atomic.h>
30 #include <linux/skbuff.h>
31 #include <linux/ieee80211.h>
32 #include <linux/timer.h>
33 /* print_ssid() is intended to be used in debug (and possibly error)
34 * messages. It should never be used for passing ssid to user space. */
35 const char *print_ssid(char *buf
, const char *ssid
, u8 ssid_len
);
36 #define DECLARE_SSID_BUF(var) char var[IEEE80211_MAX_SSID_LEN * 4 + 1] __maybe_unused
38 #define NUM_WEP_KEYS 4
41 IEEE80211_CRYPTO_TKIP_COUNTERMEASURES
= (1 << 0),
46 struct lib80211_crypto_ops
{
48 struct list_head list
;
50 /* init new crypto context (e.g., allocate private data space,
51 * select IV, etc.); returns NULL on failure or pointer to allocated
52 * private data on success */
53 void *(*init
) (int keyidx
);
55 /* deinitialize crypto context and free allocated private data */
56 void (*deinit
) (void *priv
);
58 /* encrypt/decrypt return < 0 on error or >= 0 on success. The return
59 * value from decrypt_mpdu is passed as the keyidx value for
60 * decrypt_msdu. skb must have enough head and tail room for the
61 * encryption; if not, error will be returned; these functions are
62 * called for all MPDUs (i.e., fragments).
64 int (*encrypt_mpdu
) (struct sk_buff
* skb
, int hdr_len
, void *priv
);
65 int (*decrypt_mpdu
) (struct sk_buff
* skb
, int hdr_len
, void *priv
);
67 /* These functions are called for full MSDUs, i.e. full frames.
68 * These can be NULL if full MSDU operations are not needed. */
69 int (*encrypt_msdu
) (struct sk_buff
* skb
, int hdr_len
, void *priv
);
70 int (*decrypt_msdu
) (struct sk_buff
* skb
, int keyidx
, int hdr_len
,
73 int (*set_key
) (void *key
, int len
, u8
* seq
, void *priv
);
74 int (*get_key
) (void *key
, int len
, u8
* seq
, void *priv
);
76 /* procfs handler for printing out key information and possible
78 char *(*print_stats
) (char *p
, void *priv
);
80 /* Crypto specific flag get/set for configuration settings */
81 unsigned long (*get_flags
) (void *priv
);
82 unsigned long (*set_flags
) (unsigned long flags
, void *priv
);
84 /* maximum number of bytes added by encryption; encrypt buf is
85 * allocated with extra_prefix_len bytes, copy of in_buf, and
86 * extra_postfix_len; encrypt need not use all this space, but
87 * the result must start at the beginning of the buffer and correct
88 * length must be returned */
89 int extra_mpdu_prefix_len
, extra_mpdu_postfix_len
;
90 int extra_msdu_prefix_len
, extra_msdu_postfix_len
;
95 struct lib80211_crypt_data
{
96 struct list_head list
; /* delayed deletion list */
97 struct lib80211_crypto_ops
*ops
;
102 struct lib80211_crypt_info
{
104 /* Most clients will already have a lock,
105 so just point to that. */
108 struct lib80211_crypt_data
*crypt
[NUM_WEP_KEYS
];
109 int tx_keyidx
; /* default TX key index (crypt[tx_keyidx]) */
110 struct list_head crypt_deinit_list
;
111 struct timer_list crypt_deinit_timer
;
115 int lib80211_crypt_info_init(struct lib80211_crypt_info
*info
, char *name
,
117 void lib80211_crypt_info_free(struct lib80211_crypt_info
*info
);
118 int lib80211_register_crypto_ops(struct lib80211_crypto_ops
*ops
);
119 int lib80211_unregister_crypto_ops(struct lib80211_crypto_ops
*ops
);
120 struct lib80211_crypto_ops
*lib80211_get_crypto_ops(const char *name
);
121 void lib80211_crypt_deinit_entries(struct lib80211_crypt_info
*, int);
122 void lib80211_crypt_deinit_handler(unsigned long);
123 void lib80211_crypt_delayed_deinit(struct lib80211_crypt_info
*info
,
124 struct lib80211_crypt_data
**crypt
);
125 void lib80211_crypt_quiescing(struct lib80211_crypt_info
*info
);
127 #endif /* LIB80211_H */