/* * lib80211.h -- common bits for IEEE802.11 wireless drivers * * Copyright (c) 2008, John W. Linville <linville@tuxdriver.com> * * Some bits copied from old ieee80211 component, w/ original copyright * notices below: * * Original code based on Host AP (software wireless LAN access point) driver * for Intersil Prism2/2.5/3. * * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen * <j@w1.fi> * Copyright (c) 2002-2003, Jouni Malinen <j@w1.fi> * * Adaption to a generic IEEE 802.11 stack by James Ketrenos * <jketreno@linux.intel.com> * * Copyright (c) 2004, Intel Corporation * */ #ifndef LIB80211_H#define LIB80211_H #include <linux/types.h>#include <linux/list.h>#include <linux/atomic.h>#include <linux/if.h>#include <linux/skbuff.h>#include <linux/ieee80211.h>#include <linux/timer.h>#include <linux/seq_file.h> #define NUM_WEP_KEYS	4 enum {	IEEE80211_CRYPTO_TKIP_COUNTERMEASURES = (1 << 0),}; struct module; struct lib80211_crypto_ops {	const char *name;	struct list_head list; 	/* init new crypto context (e.g., allocate private data space,	 * select IV, etc.); returns NULL on failure or pointer to allocated	 * private data on success */	void *(*init) (int keyidx); 	/* deinitialize crypto context and free allocated private data */	void (*deinit) (void *priv); 	/* encrypt/decrypt return < 0 on error or >= 0 on success. The return	 * value from decrypt_mpdu is passed as the keyidx value for	 * decrypt_msdu. skb must have enough head and tail room for the	 * encryption; if not, error will be returned; these functions are	 * called for all MPDUs (i.e., fragments).	 */	int (*encrypt_mpdu) (struct sk_buff * skb, int hdr_len, void *priv);	int (*decrypt_mpdu) (struct sk_buff * skb, int hdr_len, void *priv); 	/* These functions are called for full MSDUs, i.e. full frames.	 * These can be NULL if full MSDU operations are not needed. */	int (*encrypt_msdu) (struct sk_buff * skb, int hdr_len, void *priv);	int (*decrypt_msdu) (struct sk_buff * skb, int keyidx, int hdr_len,			     void *priv); 	int (*set_key) (void *key, int len, u8 * seq, void *priv);	int (*get_key) (void *key, int len, u8 * seq, void *priv); 	/* procfs handler for printing out key information and possible	 * statistics */	void (*print_stats) (struct seq_file *m, void *priv); 	/* Crypto specific flag get/set for configuration settings */	unsigned long (*get_flags) (void *priv);	unsigned long (*set_flags) (unsigned long flags, void *priv); 	/* maximum number of bytes added by encryption; encrypt buf is	 * allocated with extra_prefix_len bytes, copy of in_buf, and	 * extra_postfix_len; encrypt need not use all this space, but	 * the result must start at the beginning of the buffer and correct	 * length must be returned */	int extra_mpdu_prefix_len, extra_mpdu_postfix_len;	int extra_msdu_prefix_len, extra_msdu_postfix_len; 	struct module *owner;}; struct lib80211_crypt_data {	struct list_head list;	/* delayed deletion list */	struct lib80211_crypto_ops *ops;	void *priv;	atomic_t refcnt;}; struct lib80211_crypt_info {	char *name;	/* Most clients will already have a lock,	   so just point to that. */	spinlock_t *lock; 	struct lib80211_crypt_data *crypt[NUM_WEP_KEYS];	int tx_keyidx;		/* default TX key index (crypt[tx_keyidx]) */	struct list_head crypt_deinit_list;	struct timer_list crypt_deinit_timer;	int crypt_quiesced;}; int lib80211_crypt_info_init(struct lib80211_crypt_info *info, char *name,                                spinlock_t *lock);void lib80211_crypt_info_free(struct lib80211_crypt_info *info);int lib80211_register_crypto_ops(struct lib80211_crypto_ops *ops);int lib80211_unregister_crypto_ops(struct lib80211_crypto_ops *ops);struct lib80211_crypto_ops *lib80211_get_crypto_ops(const char *name);void lib80211_crypt_delayed_deinit(struct lib80211_crypt_info *info,				    struct lib80211_crypt_data **crypt); #endif /* LIB80211_H */