tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
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/types.h>
27#include <linux/list.h>
28#include <asm/atomic.h>
29
30enum {
31 IEEE80211_CRYPTO_TKIP_COUNTERMEASURES = (1 << 0),
32};
33
34struct sk_buff;
35struct module;
36
37struct ieee80211_crypto_ops {
38 const char *name;
39 struct list_head list;
40
41 /* init new crypto context (e.g., allocate private data space,
42 * select IV, etc.); returns NULL on failure or pointer to allocated
43 * private data on success */
44 void *(*init) (int keyidx);
45
46 /* deinitialize crypto context and free allocated private data */
47 void (*deinit) (void *priv);
48
49 int (*build_iv) (struct sk_buff * skb, int hdr_len, void *priv);
50
51 /* encrypt/decrypt return < 0 on error or >= 0 on success. The return
52 * value from decrypt_mpdu is passed as the keyidx value for
53 * decrypt_msdu. skb must have enough head and tail room for the
54 * encryption; if not, error will be returned; these functions are
55 * called for all MPDUs (i.e., fragments).
56 */
57 int (*encrypt_mpdu) (struct sk_buff * skb, int hdr_len, void *priv);
58 int (*decrypt_mpdu) (struct sk_buff * skb, int hdr_len, void *priv);
59
60 /* These functions are called for full MSDUs, i.e. full frames.
61 * These can be NULL if full MSDU operations are not needed. */
62 int (*encrypt_msdu) (struct sk_buff * skb, int hdr_len, void *priv);
63 int (*decrypt_msdu) (struct sk_buff * skb, int keyidx, int hdr_len,
64 void *priv);
65
66 int (*set_key) (void *key, int len, u8 * seq, void *priv);
67 int (*get_key) (void *key, int len, u8 * seq, void *priv);
68
69 /* procfs handler for printing out key information and possible
70 * statistics */
71 char *(*print_stats) (char *p, void *priv);
72
73 /* Crypto specific flag get/set for configuration settings */
74 unsigned long (*get_flags) (void *priv);
75 unsigned long (*set_flags) (unsigned long flags, void *priv);
76
77 /* maximum number of bytes added by encryption; encrypt buf is
78 * allocated with extra_prefix_len bytes, copy of in_buf, and
79 * extra_postfix_len; encrypt need not use all this space, but
80 * the result must start at the beginning of the buffer and correct
81 * length must be returned */
82 int extra_mpdu_prefix_len, extra_mpdu_postfix_len;
83 int extra_msdu_prefix_len, extra_msdu_postfix_len;
84
85 struct module *owner;
86};
87
88struct ieee80211_crypt_data {
89 struct list_head list; /* delayed deletion list */
90 struct ieee80211_crypto_ops *ops;
91 void *priv;
92 atomic_t refcnt;
93};
94
95struct ieee80211_device;
96
97int ieee80211_register_crypto_ops(struct ieee80211_crypto_ops *ops);
98int ieee80211_unregister_crypto_ops(struct ieee80211_crypto_ops *ops);
99struct ieee80211_crypto_ops *ieee80211_get_crypto_ops(const char *name);
100void ieee80211_crypt_deinit_entries(struct ieee80211_device *, int);
101void ieee80211_crypt_deinit_handler(unsigned long);
102void ieee80211_crypt_delayed_deinit(struct ieee80211_device *ieee,
103 struct ieee80211_crypt_data **crypt);
104void ieee80211_crypt_quiescing(struct ieee80211_device *ieee);
105
106#endif