diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2008-12-28 15:49:40 -0500 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-12-28 15:49:40 -0500 |
commit | 0191b625ca5a46206d2fb862bb08f36f2fcb3b31 (patch) | |
tree | 454d1842b1833d976da62abcbd5c47521ebe9bd7 /net/wireless/lib80211.c | |
parent | 54a696bd07c14d3b1192d03ce7269bc59b45209a (diff) | |
parent | eb56092fc168bf5af199d47af50c0d84a96db898 (diff) |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6: (1429 commits)
net: Allow dependancies of FDDI & Tokenring to be modular.
igb: Fix build warning when DCA is disabled.
net: Fix warning fallout from recent NAPI interface changes.
gro: Fix potential use after free
sfc: If AN is enabled, always read speed/duplex from the AN advertising bits
sfc: When disabling the NIC, close the device rather than unregistering it
sfc: SFT9001: Add cable diagnostics
sfc: Add support for multiple PHY self-tests
sfc: Merge top-level functions for self-tests
sfc: Clean up PHY mode management in loopback self-test
sfc: Fix unreliable link detection in some loopback modes
sfc: Generate unique names for per-NIC workqueues
802.3ad: use standard ethhdr instead of ad_header
802.3ad: generalize out mac address initializer
802.3ad: initialize ports LACPDU from const initializer
802.3ad: remove typedef around ad_system
802.3ad: turn ports is_individual into a bool
802.3ad: turn ports is_enabled into a bool
802.3ad: make ntt bool
ixgbe: Fix set_ringparam in ixgbe to use the same memory pools.
...
Fixed trivial IPv4/6 address printing conflicts in fs/cifs/connect.c due
to the conversion to %pI (in this networking merge) and the addition of
doing IPv6 addresses (from the earlier merge of CIFS).
Diffstat (limited to 'net/wireless/lib80211.c')
-rw-r--r-- | net/wireless/lib80211.c | 284 |
1 files changed, 284 insertions, 0 deletions
diff --git a/net/wireless/lib80211.c b/net/wireless/lib80211.c new file mode 100644 index 000000000000..97d411f74507 --- /dev/null +++ b/net/wireless/lib80211.c | |||
@@ -0,0 +1,284 @@ | |||
1 | /* | ||
2 | * lib80211 -- common bits for IEEE802.11 drivers | ||
3 | * | ||
4 | * Copyright(c) 2008 John W. Linville <linville@tuxdriver.com> | ||
5 | * | ||
6 | * Portions copied from old ieee80211 component, w/ original copyright | ||
7 | * notices below: | ||
8 | * | ||
9 | * Host AP crypto routines | ||
10 | * | ||
11 | * Copyright (c) 2002-2003, Jouni Malinen <j@w1.fi> | ||
12 | * Portions Copyright (C) 2004, Intel Corporation <jketreno@linux.intel.com> | ||
13 | * | ||
14 | */ | ||
15 | |||
16 | #include <linux/module.h> | ||
17 | #include <linux/ctype.h> | ||
18 | #include <linux/ieee80211.h> | ||
19 | #include <linux/errno.h> | ||
20 | #include <linux/init.h> | ||
21 | #include <linux/slab.h> | ||
22 | #include <linux/string.h> | ||
23 | |||
24 | #include <net/lib80211.h> | ||
25 | |||
26 | #define DRV_NAME "lib80211" | ||
27 | |||
28 | #define DRV_DESCRIPTION "common routines for IEEE802.11 drivers" | ||
29 | |||
30 | MODULE_DESCRIPTION(DRV_DESCRIPTION); | ||
31 | MODULE_AUTHOR("John W. Linville <linville@tuxdriver.com>"); | ||
32 | MODULE_LICENSE("GPL"); | ||
33 | |||
34 | struct lib80211_crypto_alg { | ||
35 | struct list_head list; | ||
36 | struct lib80211_crypto_ops *ops; | ||
37 | }; | ||
38 | |||
39 | static LIST_HEAD(lib80211_crypto_algs); | ||
40 | static DEFINE_SPINLOCK(lib80211_crypto_lock); | ||
41 | |||
42 | const char *print_ssid(char *buf, const char *ssid, u8 ssid_len) | ||
43 | { | ||
44 | const char *s = ssid; | ||
45 | char *d = buf; | ||
46 | |||
47 | ssid_len = min_t(u8, ssid_len, IEEE80211_MAX_SSID_LEN); | ||
48 | while (ssid_len--) { | ||
49 | if (isprint(*s)) { | ||
50 | *d++ = *s++; | ||
51 | continue; | ||
52 | } | ||
53 | |||
54 | *d++ = '\\'; | ||
55 | if (*s == '\0') | ||
56 | *d++ = '0'; | ||
57 | else if (*s == '\n') | ||
58 | *d++ = 'n'; | ||
59 | else if (*s == '\r') | ||
60 | *d++ = 'r'; | ||
61 | else if (*s == '\t') | ||
62 | *d++ = 't'; | ||
63 | else if (*s == '\\') | ||
64 | *d++ = '\\'; | ||
65 | else | ||
66 | d += snprintf(d, 3, "%03o", *s); | ||
67 | s++; | ||
68 | } | ||
69 | *d = '\0'; | ||
70 | return buf; | ||
71 | } | ||
72 | EXPORT_SYMBOL(print_ssid); | ||
73 | |||
74 | int lib80211_crypt_info_init(struct lib80211_crypt_info *info, char *name, | ||
75 | spinlock_t *lock) | ||
76 | { | ||
77 | memset(info, 0, sizeof(*info)); | ||
78 | |||
79 | info->name = name; | ||
80 | info->lock = lock; | ||
81 | |||
82 | INIT_LIST_HEAD(&info->crypt_deinit_list); | ||
83 | setup_timer(&info->crypt_deinit_timer, lib80211_crypt_deinit_handler, | ||
84 | (unsigned long)info); | ||
85 | |||
86 | return 0; | ||
87 | } | ||
88 | EXPORT_SYMBOL(lib80211_crypt_info_init); | ||
89 | |||
90 | void lib80211_crypt_info_free(struct lib80211_crypt_info *info) | ||
91 | { | ||
92 | int i; | ||
93 | |||
94 | lib80211_crypt_quiescing(info); | ||
95 | del_timer_sync(&info->crypt_deinit_timer); | ||
96 | lib80211_crypt_deinit_entries(info, 1); | ||
97 | |||
98 | for (i = 0; i < NUM_WEP_KEYS; i++) { | ||
99 | struct lib80211_crypt_data *crypt = info->crypt[i]; | ||
100 | if (crypt) { | ||
101 | if (crypt->ops) { | ||
102 | crypt->ops->deinit(crypt->priv); | ||
103 | module_put(crypt->ops->owner); | ||
104 | } | ||
105 | kfree(crypt); | ||
106 | info->crypt[i] = NULL; | ||
107 | } | ||
108 | } | ||
109 | } | ||
110 | EXPORT_SYMBOL(lib80211_crypt_info_free); | ||
111 | |||
112 | void lib80211_crypt_deinit_entries(struct lib80211_crypt_info *info, int force) | ||
113 | { | ||
114 | struct lib80211_crypt_data *entry, *next; | ||
115 | unsigned long flags; | ||
116 | |||
117 | spin_lock_irqsave(info->lock, flags); | ||
118 | list_for_each_entry_safe(entry, next, &info->crypt_deinit_list, list) { | ||
119 | if (atomic_read(&entry->refcnt) != 0 && !force) | ||
120 | continue; | ||
121 | |||
122 | list_del(&entry->list); | ||
123 | |||
124 | if (entry->ops) { | ||
125 | entry->ops->deinit(entry->priv); | ||
126 | module_put(entry->ops->owner); | ||
127 | } | ||
128 | kfree(entry); | ||
129 | } | ||
130 | spin_unlock_irqrestore(info->lock, flags); | ||
131 | } | ||
132 | EXPORT_SYMBOL(lib80211_crypt_deinit_entries); | ||
133 | |||
134 | /* After this, crypt_deinit_list won't accept new members */ | ||
135 | void lib80211_crypt_quiescing(struct lib80211_crypt_info *info) | ||
136 | { | ||
137 | unsigned long flags; | ||
138 | |||
139 | spin_lock_irqsave(info->lock, flags); | ||
140 | info->crypt_quiesced = 1; | ||
141 | spin_unlock_irqrestore(info->lock, flags); | ||
142 | } | ||
143 | EXPORT_SYMBOL(lib80211_crypt_quiescing); | ||
144 | |||
145 | void lib80211_crypt_deinit_handler(unsigned long data) | ||
146 | { | ||
147 | struct lib80211_crypt_info *info = (struct lib80211_crypt_info *)data; | ||
148 | unsigned long flags; | ||
149 | |||
150 | lib80211_crypt_deinit_entries(info, 0); | ||
151 | |||
152 | spin_lock_irqsave(info->lock, flags); | ||
153 | if (!list_empty(&info->crypt_deinit_list) && !info->crypt_quiesced) { | ||
154 | printk(KERN_DEBUG "%s: entries remaining in delayed crypt " | ||
155 | "deletion list\n", info->name); | ||
156 | info->crypt_deinit_timer.expires = jiffies + HZ; | ||
157 | add_timer(&info->crypt_deinit_timer); | ||
158 | } | ||
159 | spin_unlock_irqrestore(info->lock, flags); | ||
160 | } | ||
161 | EXPORT_SYMBOL(lib80211_crypt_deinit_handler); | ||
162 | |||
163 | void lib80211_crypt_delayed_deinit(struct lib80211_crypt_info *info, | ||
164 | struct lib80211_crypt_data **crypt) | ||
165 | { | ||
166 | struct lib80211_crypt_data *tmp; | ||
167 | unsigned long flags; | ||
168 | |||
169 | if (*crypt == NULL) | ||
170 | return; | ||
171 | |||
172 | tmp = *crypt; | ||
173 | *crypt = NULL; | ||
174 | |||
175 | /* must not run ops->deinit() while there may be pending encrypt or | ||
176 | * decrypt operations. Use a list of delayed deinits to avoid needing | ||
177 | * locking. */ | ||
178 | |||
179 | spin_lock_irqsave(info->lock, flags); | ||
180 | if (!info->crypt_quiesced) { | ||
181 | list_add(&tmp->list, &info->crypt_deinit_list); | ||
182 | if (!timer_pending(&info->crypt_deinit_timer)) { | ||
183 | info->crypt_deinit_timer.expires = jiffies + HZ; | ||
184 | add_timer(&info->crypt_deinit_timer); | ||
185 | } | ||
186 | } | ||
187 | spin_unlock_irqrestore(info->lock, flags); | ||
188 | } | ||
189 | EXPORT_SYMBOL(lib80211_crypt_delayed_deinit); | ||
190 | |||
191 | int lib80211_register_crypto_ops(struct lib80211_crypto_ops *ops) | ||
192 | { | ||
193 | unsigned long flags; | ||
194 | struct lib80211_crypto_alg *alg; | ||
195 | |||
196 | alg = kzalloc(sizeof(*alg), GFP_KERNEL); | ||
197 | if (alg == NULL) | ||
198 | return -ENOMEM; | ||
199 | |||
200 | alg->ops = ops; | ||
201 | |||
202 | spin_lock_irqsave(&lib80211_crypto_lock, flags); | ||
203 | list_add(&alg->list, &lib80211_crypto_algs); | ||
204 | spin_unlock_irqrestore(&lib80211_crypto_lock, flags); | ||
205 | |||
206 | printk(KERN_DEBUG "lib80211_crypt: registered algorithm '%s'\n", | ||
207 | ops->name); | ||
208 | |||
209 | return 0; | ||
210 | } | ||
211 | EXPORT_SYMBOL(lib80211_register_crypto_ops); | ||
212 | |||
213 | int lib80211_unregister_crypto_ops(struct lib80211_crypto_ops *ops) | ||
214 | { | ||
215 | struct lib80211_crypto_alg *alg; | ||
216 | unsigned long flags; | ||
217 | |||
218 | spin_lock_irqsave(&lib80211_crypto_lock, flags); | ||
219 | list_for_each_entry(alg, &lib80211_crypto_algs, list) { | ||
220 | if (alg->ops == ops) | ||
221 | goto found; | ||
222 | } | ||
223 | spin_unlock_irqrestore(&lib80211_crypto_lock, flags); | ||
224 | return -EINVAL; | ||
225 | |||
226 | found: | ||
227 | printk(KERN_DEBUG "lib80211_crypt: unregistered algorithm " | ||
228 | "'%s'\n", ops->name); | ||
229 | list_del(&alg->list); | ||
230 | spin_unlock_irqrestore(&lib80211_crypto_lock, flags); | ||
231 | kfree(alg); | ||
232 | return 0; | ||
233 | } | ||
234 | EXPORT_SYMBOL(lib80211_unregister_crypto_ops); | ||
235 | |||
236 | struct lib80211_crypto_ops *lib80211_get_crypto_ops(const char *name) | ||
237 | { | ||
238 | struct lib80211_crypto_alg *alg; | ||
239 | unsigned long flags; | ||
240 | |||
241 | spin_lock_irqsave(&lib80211_crypto_lock, flags); | ||
242 | list_for_each_entry(alg, &lib80211_crypto_algs, list) { | ||
243 | if (strcmp(alg->ops->name, name) == 0) | ||
244 | goto found; | ||
245 | } | ||
246 | spin_unlock_irqrestore(&lib80211_crypto_lock, flags); | ||
247 | return NULL; | ||
248 | |||
249 | found: | ||
250 | spin_unlock_irqrestore(&lib80211_crypto_lock, flags); | ||
251 | return alg->ops; | ||
252 | } | ||
253 | EXPORT_SYMBOL(lib80211_get_crypto_ops); | ||
254 | |||
255 | static void *lib80211_crypt_null_init(int keyidx) | ||
256 | { | ||
257 | return (void *)1; | ||
258 | } | ||
259 | |||
260 | static void lib80211_crypt_null_deinit(void *priv) | ||
261 | { | ||
262 | } | ||
263 | |||
264 | static struct lib80211_crypto_ops lib80211_crypt_null = { | ||
265 | .name = "NULL", | ||
266 | .init = lib80211_crypt_null_init, | ||
267 | .deinit = lib80211_crypt_null_deinit, | ||
268 | .owner = THIS_MODULE, | ||
269 | }; | ||
270 | |||
271 | static int __init lib80211_init(void) | ||
272 | { | ||
273 | printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION "\n"); | ||
274 | return lib80211_register_crypto_ops(&lib80211_crypt_null); | ||
275 | } | ||
276 | |||
277 | static void __exit lib80211_exit(void) | ||
278 | { | ||
279 | lib80211_unregister_crypto_ops(&lib80211_crypt_null); | ||
280 | BUG_ON(!list_empty(&lib80211_crypto_algs)); | ||
281 | } | ||
282 | |||
283 | module_init(lib80211_init); | ||
284 | module_exit(lib80211_exit); | ||