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ecdfa446 GKH |
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 | ||
28 | struct 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 | void * (*init)(int keyidx); | |
35 | ||
36 | /* deinitialize crypto context and free allocated private data */ | |
37 | void (*deinit)(void *priv); | |
38 | ||
39 | /* encrypt/decrypt return < 0 on error or >= 0 on success. The return | |
40 | * value from decrypt_mpdu is passed as the keyidx value for | |
41 | * decrypt_msdu. skb must have enough head and tail room for the | |
42 | * encryption; if not, error will be returned; these functions are | |
43 | * called for all MPDUs (i.e., fragments). | |
44 | */ | |
45 | int (*encrypt_mpdu)(struct sk_buff *skb, int hdr_len, void *priv); | |
46 | int (*decrypt_mpdu)(struct sk_buff *skb, int hdr_len, void *priv); | |
47 | ||
48 | /* These functions are called for full MSDUs, i.e. full frames. | |
49 | * These can be NULL if full MSDU operations are not needed. */ | |
50 | int (*encrypt_msdu)(struct sk_buff *skb, int hdr_len, void *priv); | |
51 | int (*decrypt_msdu)(struct sk_buff *skb, int keyidx, int hdr_len, | |
52 | void *priv); | |
53 | ||
54 | int (*set_key)(void *key, int len, u8 *seq, void *priv); | |
55 | int (*get_key)(void *key, int len, u8 *seq, void *priv); | |
56 | ||
57 | /* procfs handler for printing out key information and possible | |
58 | * statistics */ | |
59 | char * (*print_stats)(char *p, void *priv); | |
60 | ||
61 | /* maximum number of bytes added by encryption; encrypt buf is | |
62 | * allocated with extra_prefix_len bytes, copy of in_buf, and | |
63 | * extra_postfix_len; encrypt need not use all this space, but | |
64 | * the result must start at the beginning of the buffer and correct | |
65 | * length must be returned */ | |
66 | int extra_prefix_len, extra_postfix_len; | |
67 | ||
68 | struct module *owner; | |
69 | }; | |
70 | ||
71 | struct ieee80211_crypt_data { | |
72 | struct list_head list; /* delayed deletion list */ | |
73 | struct ieee80211_crypto_ops *ops; | |
74 | void *priv; | |
75 | atomic_t refcnt; | |
76 | }; | |
77 | ||
78 | int ieee80211_register_crypto_ops(struct ieee80211_crypto_ops *ops); | |
79 | int ieee80211_unregister_crypto_ops(struct ieee80211_crypto_ops *ops); | |
80 | struct ieee80211_crypto_ops * ieee80211_get_crypto_ops(const char *name); | |
81 | void ieee80211_crypt_deinit_entries(struct ieee80211_device *, int); | |
82 | void ieee80211_crypt_deinit_handler(unsigned long); | |
83 | void ieee80211_crypt_delayed_deinit(struct ieee80211_device *ieee, | |
84 | struct ieee80211_crypt_data **crypt); | |
85 | ||
86 | #endif |