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e9f207f0 JB |
1 | /* |
2 | * Copyright 2003-2005 Devicescape Software, Inc. | |
3 | * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz> | |
4 | * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | */ | |
10 | ||
11 | #include <linux/kobject.h> | |
12 | #include "ieee80211_i.h" | |
2c8dccc7 | 13 | #include "key.h" |
e9f207f0 JB |
14 | #include "debugfs.h" |
15 | #include "debugfs_key.h" | |
16 | ||
8f20fc24 | 17 | #define KEY_READ(name, prop, buflen, format_string) \ |
e9f207f0 JB |
18 | static ssize_t key_##name##_read(struct file *file, \ |
19 | char __user *userbuf, \ | |
20 | size_t count, loff_t *ppos) \ | |
21 | { \ | |
22 | char buf[buflen]; \ | |
23 | struct ieee80211_key *key = file->private_data; \ | |
8f20fc24 | 24 | int res = scnprintf(buf, buflen, format_string, key->prop); \ |
e9f207f0 JB |
25 | return simple_read_from_buffer(userbuf, count, ppos, buf, res); \ |
26 | } | |
8f20fc24 | 27 | #define KEY_READ_D(name) KEY_READ(name, name, 20, "%d\n") |
11a843b7 | 28 | #define KEY_READ_X(name) KEY_READ(name, name, 20, "0x%x\n") |
e9f207f0 JB |
29 | |
30 | #define KEY_OPS(name) \ | |
31 | static const struct file_operations key_ ##name## _ops = { \ | |
32 | .read = key_##name##_read, \ | |
33 | .open = mac80211_open_file_generic, \ | |
34 | } | |
35 | ||
36 | #define KEY_FILE(name, format) \ | |
37 | KEY_READ_##format(name) \ | |
38 | KEY_OPS(name) | |
39 | ||
8f20fc24 JB |
40 | #define KEY_CONF_READ(name, buflen, format_string) \ |
41 | KEY_READ(conf_##name, conf.name, buflen, format_string) | |
42 | #define KEY_CONF_READ_D(name) KEY_CONF_READ(name, 20, "%d\n") | |
8f20fc24 JB |
43 | |
44 | #define KEY_CONF_OPS(name) \ | |
45 | static const struct file_operations key_ ##name## _ops = { \ | |
46 | .read = key_conf_##name##_read, \ | |
47 | .open = mac80211_open_file_generic, \ | |
48 | } | |
49 | ||
50 | #define KEY_CONF_FILE(name, format) \ | |
51 | KEY_CONF_READ_##format(name) \ | |
52 | KEY_CONF_OPS(name) | |
53 | ||
54 | KEY_CONF_FILE(keylen, D); | |
55 | KEY_CONF_FILE(keyidx, D); | |
56 | KEY_CONF_FILE(hw_key_idx, D); | |
11a843b7 | 57 | KEY_FILE(flags, X); |
e9f207f0 | 58 | KEY_FILE(tx_rx_count, D); |
e7a64f12 JB |
59 | KEY_READ(ifindex, sdata->dev->ifindex, 20, "%d\n"); |
60 | KEY_OPS(ifindex); | |
e9f207f0 JB |
61 | |
62 | static ssize_t key_algorithm_read(struct file *file, | |
63 | char __user *userbuf, | |
64 | size_t count, loff_t *ppos) | |
65 | { | |
66 | char *alg; | |
67 | struct ieee80211_key *key = file->private_data; | |
68 | ||
8f20fc24 | 69 | switch (key->conf.alg) { |
e9f207f0 JB |
70 | case ALG_WEP: |
71 | alg = "WEP\n"; | |
72 | break; | |
73 | case ALG_TKIP: | |
74 | alg = "TKIP\n"; | |
75 | break; | |
76 | case ALG_CCMP: | |
77 | alg = "CCMP\n"; | |
78 | break; | |
3cfcf6ac JM |
79 | case ALG_AES_CMAC: |
80 | alg = "AES-128-CMAC\n"; | |
81 | break; | |
e9f207f0 JB |
82 | default: |
83 | return 0; | |
84 | } | |
85 | return simple_read_from_buffer(userbuf, count, ppos, alg, strlen(alg)); | |
86 | } | |
87 | KEY_OPS(algorithm); | |
88 | ||
89 | static ssize_t key_tx_spec_read(struct file *file, char __user *userbuf, | |
90 | size_t count, loff_t *ppos) | |
91 | { | |
92 | const u8 *tpn; | |
93 | char buf[20]; | |
94 | int len; | |
95 | struct ieee80211_key *key = file->private_data; | |
96 | ||
8f20fc24 | 97 | switch (key->conf.alg) { |
e9f207f0 JB |
98 | case ALG_WEP: |
99 | len = scnprintf(buf, sizeof(buf), "\n"); | |
50339a67 | 100 | break; |
e9f207f0 JB |
101 | case ALG_TKIP: |
102 | len = scnprintf(buf, sizeof(buf), "%08x %04x\n", | |
b0f76b33 HH |
103 | key->u.tkip.tx.iv32, |
104 | key->u.tkip.tx.iv16); | |
50339a67 | 105 | break; |
e9f207f0 JB |
106 | case ALG_CCMP: |
107 | tpn = key->u.ccmp.tx_pn; | |
108 | len = scnprintf(buf, sizeof(buf), "%02x%02x%02x%02x%02x%02x\n", | |
109 | tpn[0], tpn[1], tpn[2], tpn[3], tpn[4], tpn[5]); | |
50339a67 | 110 | break; |
3cfcf6ac JM |
111 | case ALG_AES_CMAC: |
112 | tpn = key->u.aes_cmac.tx_pn; | |
113 | len = scnprintf(buf, sizeof(buf), "%02x%02x%02x%02x%02x%02x\n", | |
114 | tpn[0], tpn[1], tpn[2], tpn[3], tpn[4], | |
115 | tpn[5]); | |
116 | break; | |
e9f207f0 JB |
117 | default: |
118 | return 0; | |
119 | } | |
120 | return simple_read_from_buffer(userbuf, count, ppos, buf, len); | |
121 | } | |
122 | KEY_OPS(tx_spec); | |
123 | ||
124 | static ssize_t key_rx_spec_read(struct file *file, char __user *userbuf, | |
125 | size_t count, loff_t *ppos) | |
126 | { | |
127 | struct ieee80211_key *key = file->private_data; | |
128 | char buf[14*NUM_RX_DATA_QUEUES+1], *p = buf; | |
129 | int i, len; | |
130 | const u8 *rpn; | |
131 | ||
8f20fc24 | 132 | switch (key->conf.alg) { |
e9f207f0 JB |
133 | case ALG_WEP: |
134 | len = scnprintf(buf, sizeof(buf), "\n"); | |
50339a67 | 135 | break; |
e9f207f0 JB |
136 | case ALG_TKIP: |
137 | for (i = 0; i < NUM_RX_DATA_QUEUES; i++) | |
138 | p += scnprintf(p, sizeof(buf)+buf-p, | |
139 | "%08x %04x\n", | |
b0f76b33 HH |
140 | key->u.tkip.rx[i].iv32, |
141 | key->u.tkip.rx[i].iv16); | |
e9f207f0 | 142 | len = p - buf; |
50339a67 | 143 | break; |
e9f207f0 JB |
144 | case ALG_CCMP: |
145 | for (i = 0; i < NUM_RX_DATA_QUEUES; i++) { | |
146 | rpn = key->u.ccmp.rx_pn[i]; | |
147 | p += scnprintf(p, sizeof(buf)+buf-p, | |
148 | "%02x%02x%02x%02x%02x%02x\n", | |
149 | rpn[0], rpn[1], rpn[2], | |
150 | rpn[3], rpn[4], rpn[5]); | |
151 | } | |
152 | len = p - buf; | |
50339a67 | 153 | break; |
3cfcf6ac JM |
154 | case ALG_AES_CMAC: |
155 | rpn = key->u.aes_cmac.rx_pn; | |
156 | p += scnprintf(p, sizeof(buf)+buf-p, | |
157 | "%02x%02x%02x%02x%02x%02x\n", | |
158 | rpn[0], rpn[1], rpn[2], | |
159 | rpn[3], rpn[4], rpn[5]); | |
160 | len = p - buf; | |
161 | break; | |
e9f207f0 JB |
162 | default: |
163 | return 0; | |
164 | } | |
165 | return simple_read_from_buffer(userbuf, count, ppos, buf, len); | |
166 | } | |
167 | KEY_OPS(rx_spec); | |
168 | ||
169 | static ssize_t key_replays_read(struct file *file, char __user *userbuf, | |
170 | size_t count, loff_t *ppos) | |
171 | { | |
172 | struct ieee80211_key *key = file->private_data; | |
173 | char buf[20]; | |
174 | int len; | |
175 | ||
3cfcf6ac JM |
176 | switch (key->conf.alg) { |
177 | case ALG_CCMP: | |
178 | len = scnprintf(buf, sizeof(buf), "%u\n", key->u.ccmp.replays); | |
179 | break; | |
180 | case ALG_AES_CMAC: | |
181 | len = scnprintf(buf, sizeof(buf), "%u\n", | |
182 | key->u.aes_cmac.replays); | |
183 | break; | |
184 | default: | |
e9f207f0 | 185 | return 0; |
3cfcf6ac | 186 | } |
e9f207f0 JB |
187 | return simple_read_from_buffer(userbuf, count, ppos, buf, len); |
188 | } | |
189 | KEY_OPS(replays); | |
190 | ||
3cfcf6ac JM |
191 | static ssize_t key_icverrors_read(struct file *file, char __user *userbuf, |
192 | size_t count, loff_t *ppos) | |
193 | { | |
194 | struct ieee80211_key *key = file->private_data; | |
195 | char buf[20]; | |
196 | int len; | |
197 | ||
198 | switch (key->conf.alg) { | |
199 | case ALG_AES_CMAC: | |
200 | len = scnprintf(buf, sizeof(buf), "%u\n", | |
201 | key->u.aes_cmac.icverrors); | |
202 | break; | |
203 | default: | |
204 | return 0; | |
205 | } | |
206 | return simple_read_from_buffer(userbuf, count, ppos, buf, len); | |
207 | } | |
208 | KEY_OPS(icverrors); | |
209 | ||
e9f207f0 JB |
210 | static ssize_t key_key_read(struct file *file, char __user *userbuf, |
211 | size_t count, loff_t *ppos) | |
212 | { | |
213 | struct ieee80211_key *key = file->private_data; | |
8f20fc24 | 214 | int i, res, bufsize = 2 * key->conf.keylen + 2; |
e9f207f0 JB |
215 | char *buf = kmalloc(bufsize, GFP_KERNEL); |
216 | char *p = buf; | |
217 | ||
8f20fc24 JB |
218 | for (i = 0; i < key->conf.keylen; i++) |
219 | p += scnprintf(p, bufsize + buf - p, "%02x", key->conf.key[i]); | |
e9f207f0 JB |
220 | p += scnprintf(p, bufsize+buf-p, "\n"); |
221 | res = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); | |
222 | kfree(buf); | |
223 | return res; | |
224 | } | |
225 | KEY_OPS(key); | |
226 | ||
227 | #define DEBUGFS_ADD(name) \ | |
7bcfaf2f JB |
228 | debugfs_create_file(#name, 0400, key->debugfs.dir, \ |
229 | key, &key_##name##_ops); | |
e9f207f0 | 230 | |
3b96766f JB |
231 | void ieee80211_debugfs_key_add(struct ieee80211_key *key) |
232 | { | |
50339a67 | 233 | static int keycount; |
3b96766f | 234 | char buf[50]; |
3b96766f | 235 | struct sta_info *sta; |
e9f207f0 | 236 | |
3b96766f | 237 | if (!key->local->debugfs.keys) |
e9f207f0 JB |
238 | return; |
239 | ||
50339a67 | 240 | sprintf(buf, "%d", keycount); |
d9c58f30 | 241 | key->debugfs.cnt = keycount; |
50339a67 | 242 | keycount++; |
e9f207f0 | 243 | key->debugfs.dir = debugfs_create_dir(buf, |
3b96766f | 244 | key->local->debugfs.keys); |
e9f207f0 JB |
245 | |
246 | if (!key->debugfs.dir) | |
247 | return; | |
248 | ||
3b96766f JB |
249 | rcu_read_lock(); |
250 | sta = rcu_dereference(key->sta); | |
251 | if (sta) | |
0c68ae26 | 252 | sprintf(buf, "../../stations/%pM", sta->sta.addr); |
3b96766f JB |
253 | rcu_read_unlock(); |
254 | ||
255 | /* using sta as a boolean is fine outside RCU lock */ | |
256 | if (sta) | |
257 | key->debugfs.stalink = | |
258 | debugfs_create_symlink("station", key->debugfs.dir, buf); | |
259 | ||
e9f207f0 | 260 | DEBUGFS_ADD(keylen); |
8f20fc24 | 261 | DEBUGFS_ADD(flags); |
e9f207f0 JB |
262 | DEBUGFS_ADD(keyidx); |
263 | DEBUGFS_ADD(hw_key_idx); | |
264 | DEBUGFS_ADD(tx_rx_count); | |
265 | DEBUGFS_ADD(algorithm); | |
266 | DEBUGFS_ADD(tx_spec); | |
267 | DEBUGFS_ADD(rx_spec); | |
268 | DEBUGFS_ADD(replays); | |
3cfcf6ac | 269 | DEBUGFS_ADD(icverrors); |
e9f207f0 | 270 | DEBUGFS_ADD(key); |
e7a64f12 | 271 | DEBUGFS_ADD(ifindex); |
e9f207f0 JB |
272 | }; |
273 | ||
e9f207f0 JB |
274 | void ieee80211_debugfs_key_remove(struct ieee80211_key *key) |
275 | { | |
276 | if (!key) | |
277 | return; | |
278 | ||
7bcfaf2f | 279 | debugfs_remove_recursive(key->debugfs.dir); |
e9f207f0 JB |
280 | key->debugfs.dir = NULL; |
281 | } | |
282 | void ieee80211_debugfs_key_add_default(struct ieee80211_sub_if_data *sdata) | |
283 | { | |
284 | char buf[50]; | |
78520cad | 285 | struct ieee80211_key *key; |
e9f207f0 | 286 | |
7bcfaf2f | 287 | if (!sdata->debugfs.dir) |
e9f207f0 JB |
288 | return; |
289 | ||
78520cad JB |
290 | /* this is running under the key lock */ |
291 | ||
292 | key = sdata->default_key; | |
293 | if (key) { | |
294 | sprintf(buf, "../keys/%d", key->debugfs.cnt); | |
7bcfaf2f | 295 | sdata->debugfs.default_key = |
78520cad | 296 | debugfs_create_symlink("default_key", |
7bcfaf2f | 297 | sdata->debugfs.dir, buf); |
78520cad JB |
298 | } else |
299 | ieee80211_debugfs_key_remove_default(sdata); | |
e9f207f0 | 300 | } |
78520cad | 301 | |
e9f207f0 JB |
302 | void ieee80211_debugfs_key_remove_default(struct ieee80211_sub_if_data *sdata) |
303 | { | |
304 | if (!sdata) | |
305 | return; | |
306 | ||
7bcfaf2f JB |
307 | debugfs_remove(sdata->debugfs.default_key); |
308 | sdata->debugfs.default_key = NULL; | |
e9f207f0 | 309 | } |
e9f207f0 | 310 | |
3cfcf6ac JM |
311 | void ieee80211_debugfs_key_add_mgmt_default(struct ieee80211_sub_if_data *sdata) |
312 | { | |
313 | char buf[50]; | |
314 | struct ieee80211_key *key; | |
315 | ||
7bcfaf2f | 316 | if (!sdata->debugfs.dir) |
3cfcf6ac JM |
317 | return; |
318 | ||
319 | /* this is running under the key lock */ | |
320 | ||
321 | key = sdata->default_mgmt_key; | |
322 | if (key) { | |
323 | sprintf(buf, "../keys/%d", key->debugfs.cnt); | |
7bcfaf2f | 324 | sdata->debugfs.default_mgmt_key = |
3cfcf6ac | 325 | debugfs_create_symlink("default_mgmt_key", |
7bcfaf2f | 326 | sdata->debugfs.dir, buf); |
3cfcf6ac JM |
327 | } else |
328 | ieee80211_debugfs_key_remove_mgmt_default(sdata); | |
329 | } | |
330 | ||
331 | void ieee80211_debugfs_key_remove_mgmt_default(struct ieee80211_sub_if_data *sdata) | |
332 | { | |
333 | if (!sdata) | |
334 | return; | |
335 | ||
7bcfaf2f JB |
336 | debugfs_remove(sdata->debugfs.default_mgmt_key); |
337 | sdata->debugfs.default_mgmt_key = NULL; | |
3cfcf6ac JM |
338 | } |
339 | ||
e9f207f0 JB |
340 | void ieee80211_debugfs_key_sta_del(struct ieee80211_key *key, |
341 | struct sta_info *sta) | |
342 | { | |
343 | debugfs_remove(key->debugfs.stalink); | |
344 | key->debugfs.stalink = NULL; | |
345 | } |