130 lines
4.4 KiB
C
130 lines
4.4 KiB
C
/*
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* lib80211.h -- common bits for IEEE802.11 wireless drivers
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*
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* Copyright (c) 2008, John W. Linville <linville@tuxdriver.com>
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*
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* Some bits copied from old ieee80211 component, w/ original copyright
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* notices below:
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*
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* Original code based on Host AP (software wireless LAN access point) driver
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* for Intersil Prism2/2.5/3.
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*
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* Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
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* <j@w1.fi>
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* Copyright (c) 2002-2003, Jouni Malinen <j@w1.fi>
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*
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* Adaption to a generic IEEE 802.11 stack by James Ketrenos
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* <jketreno@linux.intel.com>
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*
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* Copyright (c) 2004, Intel Corporation
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*
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*/
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#ifndef LIB80211_H
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#define LIB80211_H
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#include <linux/types.h>
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#include <linux/list.h>
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#include <linux/module.h>
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#include <asm/atomic.h>
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#include <linux/if.h>
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#include <linux/skbuff.h>
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#include <linux/ieee80211.h>
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#include <linux/timer.h>
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/* print_ssid() is intended to be used in debug (and possibly error)
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* messages. It should never be used for passing ssid to user space. */
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const char *print_ssid(char *buf, const char *ssid, u8 ssid_len);
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#define DECLARE_SSID_BUF(var) char var[IEEE80211_MAX_SSID_LEN * 4 + 1] __maybe_unused
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#define NUM_WEP_KEYS 4
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enum {
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IEEE80211_CRYPTO_TKIP_COUNTERMEASURES = (1 << 0),
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};
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struct lib80211_crypto_ops {
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const char *name;
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struct list_head list;
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/* init new crypto context (e.g., allocate private data space,
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* select IV, etc.); returns NULL on failure or pointer to allocated
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* private data on success */
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void *(*init) (int keyidx);
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/* deinitialize crypto context and free allocated private data */
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void (*deinit) (void *priv);
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int (*build_iv) (struct sk_buff * skb, int hdr_len,
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u8 *key, int keylen, void *priv);
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/* encrypt/decrypt return < 0 on error or >= 0 on success. The return
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* value from decrypt_mpdu is passed as the keyidx value for
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* decrypt_msdu. skb must have enough head and tail room for the
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* encryption; if not, error will be returned; these functions are
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* called for all MPDUs (i.e., fragments).
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*/
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int (*encrypt_mpdu) (struct sk_buff * skb, int hdr_len, void *priv);
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int (*decrypt_mpdu) (struct sk_buff * skb, int hdr_len, void *priv);
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/* These functions are called for full MSDUs, i.e. full frames.
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* These can be NULL if full MSDU operations are not needed. */
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int (*encrypt_msdu) (struct sk_buff * skb, int hdr_len, void *priv);
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int (*decrypt_msdu) (struct sk_buff * skb, int keyidx, int hdr_len,
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void *priv);
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int (*set_key) (void *key, int len, u8 * seq, void *priv);
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int (*get_key) (void *key, int len, u8 * seq, void *priv);
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/* procfs handler for printing out key information and possible
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* statistics */
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char *(*print_stats) (char *p, void *priv);
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/* Crypto specific flag get/set for configuration settings */
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unsigned long (*get_flags) (void *priv);
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unsigned long (*set_flags) (unsigned long flags, void *priv);
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/* maximum number of bytes added by encryption; encrypt buf is
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* allocated with extra_prefix_len bytes, copy of in_buf, and
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* extra_postfix_len; encrypt need not use all this space, but
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* the result must start at the beginning of the buffer and correct
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* length must be returned */
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int extra_mpdu_prefix_len, extra_mpdu_postfix_len;
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int extra_msdu_prefix_len, extra_msdu_postfix_len;
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struct module *owner;
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};
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struct lib80211_crypt_data {
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struct list_head list; /* delayed deletion list */
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struct lib80211_crypto_ops *ops;
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void *priv;
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atomic_t refcnt;
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};
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struct lib80211_crypt_info {
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char *name;
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/* Most clients will already have a lock,
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so just point to that. */
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spinlock_t *lock;
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struct lib80211_crypt_data *crypt[NUM_WEP_KEYS];
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int tx_keyidx; /* default TX key index (crypt[tx_keyidx]) */
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struct list_head crypt_deinit_list;
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struct timer_list crypt_deinit_timer;
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int crypt_quiesced;
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};
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int lib80211_crypt_info_init(struct lib80211_crypt_info *info, char *name,
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spinlock_t *lock);
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void lib80211_crypt_info_free(struct lib80211_crypt_info *info);
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int lib80211_register_crypto_ops(struct lib80211_crypto_ops *ops);
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int lib80211_unregister_crypto_ops(struct lib80211_crypto_ops *ops);
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struct lib80211_crypto_ops *lib80211_get_crypto_ops(const char *name);
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void lib80211_crypt_deinit_entries(struct lib80211_crypt_info *, int);
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void lib80211_crypt_deinit_handler(unsigned long);
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void lib80211_crypt_delayed_deinit(struct lib80211_crypt_info *info,
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struct lib80211_crypt_data **crypt);
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void lib80211_crypt_quiescing(struct lib80211_crypt_info *info);
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#endif /* LIB80211_H */
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