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 <net/ieee80211.h>
29#include <asm/atomic.h>
30
31enum {
32 IEEE80211_CRYPTO_TKIP_COUNTERMEASURES = (1 << 0),
33};
34
35struct sk_buff;
36struct module;
37
38struct ieee80211_crypto_ops {
39 const char *name;
40 struct list_head list;
41
42 /* init new crypto context (e.g., allocate private data space,
43 * select IV, etc.); returns NULL on failure or pointer to allocated
44 * private data on success */
45 void *(*init) (int keyidx);
46
47 /* deinitialize crypto context and free allocated private data */
48 void (*deinit) (void *priv);
49
50 int (*build_iv) (struct sk_buff * skb, int hdr_len, void *priv);
51
52 /* encrypt/decrypt return < 0 on error or >= 0 on success. The return
53 * value from decrypt_mpdu is passed as the keyidx value for
54 * decrypt_msdu. skb must have enough head and tail room for the
55 * encryption; if not, error will be returned; these functions are
56 * called for all MPDUs (i.e., fragments).
57 */
58 int (*encrypt_mpdu) (struct sk_buff * skb, int hdr_len, void *priv);
59 int (*decrypt_mpdu) (struct sk_buff * skb, int hdr_len, void *priv);
60
61 /* These functions are called for full MSDUs, i.e. full frames.
62 * These can be NULL if full MSDU operations are not needed. */
63 int (*encrypt_msdu) (struct sk_buff * skb, int hdr_len, void *priv);
64 int (*decrypt_msdu) (struct sk_buff * skb, int keyidx, int hdr_len,
65 void *priv);
66
67 int (*set_key) (void *key, int len, u8 * seq, void *priv);
68 int (*get_key) (void *key, int len, u8 * seq, void *priv);
69
70 /* procfs handler for printing out key information and possible
71 * statistics */
72 char *(*print_stats) (char *p, void *priv);
73
74 /* Crypto specific flag get/set for configuration settings */
75 unsigned long (*get_flags) (void *priv);
76 unsigned long (*set_flags) (unsigned long flags, void *priv);
77
78 /* maximum number of bytes added by encryption; encrypt buf is
79 * allocated with extra_prefix_len bytes, copy of in_buf, and
80 * extra_postfix_len; encrypt need not use all this space, but
81 * the result must start at the beginning of the buffer and correct
82 * length must be returned */
83 int extra_mpdu_prefix_len, extra_mpdu_postfix_len;
84 int extra_msdu_prefix_len, extra_msdu_postfix_len;
85
86 struct module *owner;
87};
88
89struct ieee80211_crypt_data {
90 struct list_head list; /* delayed deletion list */
91 struct ieee80211_crypto_ops *ops;
92 void *priv;
93 atomic_t refcnt;
94};
95
96struct ieee80211_device;
97
98int ieee80211_register_crypto_ops(struct ieee80211_crypto_ops *ops);
99int ieee80211_unregister_crypto_ops(struct ieee80211_crypto_ops *ops);
100struct ieee80211_crypto_ops *ieee80211_get_crypto_ops(const char *name);
101void ieee80211_crypt_deinit_entries(struct ieee80211_device *, int);
102void ieee80211_crypt_deinit_handler(unsigned long);
103void ieee80211_crypt_delayed_deinit(struct ieee80211_device *ieee,
104 struct ieee80211_crypt_data **crypt);
105void ieee80211_crypt_quiescing(struct ieee80211_device *ieee);
106
107#endif