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 #include <linux/seq_file.h>
35 #define NUM_WEP_KEYS 4
38 IEEE80211_CRYPTO_TKIP_COUNTERMEASURES = (1 << 0),
43 struct lib80211_crypto_ops {
45 struct list_head list;
47 /* init new crypto context (e.g., allocate private data space,
48 * select IV, etc.); returns NULL on failure or pointer to allocated
49 * private data on success */
50 void *(*init) (int keyidx);
52 /* deinitialize crypto context and free allocated private data */
53 void (*deinit) (void *priv);
55 /* encrypt/decrypt return < 0 on error or >= 0 on success. The return
56 * value from decrypt_mpdu is passed as the keyidx value for
57 * decrypt_msdu. skb must have enough head and tail room for the
58 * encryption; if not, error will be returned; these functions are
59 * called for all MPDUs (i.e., fragments).
61 int (*encrypt_mpdu) (struct sk_buff * skb, int hdr_len, void *priv);
62 int (*decrypt_mpdu) (struct sk_buff * skb, int hdr_len, void *priv);
64 /* These functions are called for full MSDUs, i.e. full frames.
65 * These can be NULL if full MSDU operations are not needed. */
66 int (*encrypt_msdu) (struct sk_buff * skb, int hdr_len, void *priv);
67 int (*decrypt_msdu) (struct sk_buff * skb, int keyidx, int hdr_len,
70 int (*set_key) (void *key, int len, u8 * seq, void *priv);
71 int (*get_key) (void *key, int len, u8 * seq, void *priv);
73 /* procfs handler for printing out key information and possible
75 void (*print_stats) (struct seq_file *m, void *priv);
77 /* Crypto specific flag get/set for configuration settings */
78 unsigned long (*get_flags) (void *priv);
79 unsigned long (*set_flags) (unsigned long flags, void *priv);
81 /* maximum number of bytes added by encryption; encrypt buf is
82 * allocated with extra_prefix_len bytes, copy of in_buf, and
83 * extra_postfix_len; encrypt need not use all this space, but
84 * the result must start at the beginning of the buffer and correct
85 * length must be returned */
86 int extra_mpdu_prefix_len, extra_mpdu_postfix_len;
87 int extra_msdu_prefix_len, extra_msdu_postfix_len;
92 struct lib80211_crypt_data {
93 struct list_head list; /* delayed deletion list */
94 struct lib80211_crypto_ops *ops;
99 struct lib80211_crypt_info {
101 /* Most clients will already have a lock,
102 so just point to that. */
105 struct lib80211_crypt_data *crypt[NUM_WEP_KEYS];
106 int tx_keyidx; /* default TX key index (crypt[tx_keyidx]) */
107 struct list_head crypt_deinit_list;
108 struct timer_list crypt_deinit_timer;
112 int lib80211_crypt_info_init(struct lib80211_crypt_info *info, char *name,
114 void lib80211_crypt_info_free(struct lib80211_crypt_info *info);
115 int lib80211_register_crypto_ops(struct lib80211_crypto_ops *ops);
116 int lib80211_unregister_crypto_ops(struct lib80211_crypto_ops *ops);
117 struct lib80211_crypto_ops *lib80211_get_crypto_ops(const char *name);
118 void lib80211_crypt_delayed_deinit(struct lib80211_crypt_info *info,
119 struct lib80211_crypt_data **crypt);
121 #endif /* LIB80211_H */