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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> | |
5a0e3ad6 | 12 | #include <linux/slab.h> |
e9f207f0 | 13 | #include "ieee80211_i.h" |
2c8dccc7 | 14 | #include "key.h" |
e9f207f0 JB |
15 | #include "debugfs.h" |
16 | #include "debugfs_key.h" | |
17 | ||
07caf9d6 | 18 | #define KEY_READ(name, prop, format_string) \ |
e9f207f0 JB |
19 | static ssize_t key_##name##_read(struct file *file, \ |
20 | char __user *userbuf, \ | |
21 | size_t count, loff_t *ppos) \ | |
22 | { \ | |
e9f207f0 | 23 | struct ieee80211_key *key = file->private_data; \ |
07caf9d6 EP |
24 | return mac80211_format_buffer(userbuf, count, ppos, \ |
25 | format_string, key->prop); \ | |
e9f207f0 | 26 | } |
07caf9d6 EP |
27 | #define KEY_READ_D(name) KEY_READ(name, name, "%d\n") |
28 | #define KEY_READ_X(name) KEY_READ(name, name, "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, \ | |
2b18ab36 | 34 | .llseek = generic_file_llseek, \ |
e9f207f0 JB |
35 | } |
36 | ||
37 | #define KEY_FILE(name, format) \ | |
38 | KEY_READ_##format(name) \ | |
39 | KEY_OPS(name) | |
40 | ||
07caf9d6 EP |
41 | #define KEY_CONF_READ(name, format_string) \ |
42 | KEY_READ(conf_##name, conf.name, format_string) | |
43 | #define KEY_CONF_READ_D(name) KEY_CONF_READ(name, "%d\n") | |
8f20fc24 JB |
44 | |
45 | #define KEY_CONF_OPS(name) \ | |
46 | static const struct file_operations key_ ##name## _ops = { \ | |
47 | .read = key_conf_##name##_read, \ | |
48 | .open = mac80211_open_file_generic, \ | |
2b18ab36 | 49 | .llseek = generic_file_llseek, \ |
8f20fc24 JB |
50 | } |
51 | ||
52 | #define KEY_CONF_FILE(name, format) \ | |
53 | KEY_CONF_READ_##format(name) \ | |
54 | KEY_CONF_OPS(name) | |
55 | ||
56 | KEY_CONF_FILE(keylen, D); | |
57 | KEY_CONF_FILE(keyidx, D); | |
58 | KEY_CONF_FILE(hw_key_idx, D); | |
11a843b7 | 59 | KEY_FILE(flags, X); |
e9f207f0 | 60 | KEY_FILE(tx_rx_count, D); |
07caf9d6 | 61 | KEY_READ(ifindex, sdata->name, "%s\n"); |
e7a64f12 | 62 | KEY_OPS(ifindex); |
e9f207f0 JB |
63 | |
64 | static ssize_t key_algorithm_read(struct file *file, | |
65 | char __user *userbuf, | |
66 | size_t count, loff_t *ppos) | |
67 | { | |
97359d12 | 68 | char buf[15]; |
e9f207f0 | 69 | struct ieee80211_key *key = file->private_data; |
97359d12 | 70 | u32 c = key->conf.cipher; |
e9f207f0 | 71 | |
97359d12 JB |
72 | sprintf(buf, "%.2x-%.2x-%.2x:%d\n", |
73 | c >> 24, (c >> 16) & 0xff, (c >> 8) & 0xff, c & 0xff); | |
74 | return simple_read_from_buffer(userbuf, count, ppos, buf, strlen(buf)); | |
e9f207f0 JB |
75 | } |
76 | KEY_OPS(algorithm); | |
77 | ||
78 | static ssize_t key_tx_spec_read(struct file *file, char __user *userbuf, | |
79 | size_t count, loff_t *ppos) | |
80 | { | |
81 | const u8 *tpn; | |
82 | char buf[20]; | |
83 | int len; | |
84 | struct ieee80211_key *key = file->private_data; | |
85 | ||
97359d12 JB |
86 | switch (key->conf.cipher) { |
87 | case WLAN_CIPHER_SUITE_WEP40: | |
88 | case WLAN_CIPHER_SUITE_WEP104: | |
e9f207f0 | 89 | len = scnprintf(buf, sizeof(buf), "\n"); |
50339a67 | 90 | break; |
97359d12 | 91 | case WLAN_CIPHER_SUITE_TKIP: |
e9f207f0 | 92 | len = scnprintf(buf, sizeof(buf), "%08x %04x\n", |
b0f76b33 HH |
93 | key->u.tkip.tx.iv32, |
94 | key->u.tkip.tx.iv16); | |
50339a67 | 95 | break; |
97359d12 | 96 | case WLAN_CIPHER_SUITE_CCMP: |
e9f207f0 JB |
97 | tpn = key->u.ccmp.tx_pn; |
98 | len = scnprintf(buf, sizeof(buf), "%02x%02x%02x%02x%02x%02x\n", | |
99 | tpn[0], tpn[1], tpn[2], tpn[3], tpn[4], tpn[5]); | |
50339a67 | 100 | break; |
97359d12 | 101 | case WLAN_CIPHER_SUITE_AES_CMAC: |
3cfcf6ac JM |
102 | tpn = key->u.aes_cmac.tx_pn; |
103 | len = scnprintf(buf, sizeof(buf), "%02x%02x%02x%02x%02x%02x\n", | |
104 | tpn[0], tpn[1], tpn[2], tpn[3], tpn[4], | |
105 | tpn[5]); | |
106 | break; | |
e9f207f0 JB |
107 | default: |
108 | return 0; | |
109 | } | |
110 | return simple_read_from_buffer(userbuf, count, ppos, buf, len); | |
111 | } | |
112 | KEY_OPS(tx_spec); | |
113 | ||
114 | static ssize_t key_rx_spec_read(struct file *file, char __user *userbuf, | |
115 | size_t count, loff_t *ppos) | |
116 | { | |
117 | struct ieee80211_key *key = file->private_data; | |
118 | char buf[14*NUM_RX_DATA_QUEUES+1], *p = buf; | |
119 | int i, len; | |
120 | const u8 *rpn; | |
121 | ||
97359d12 JB |
122 | switch (key->conf.cipher) { |
123 | case WLAN_CIPHER_SUITE_WEP40: | |
124 | case WLAN_CIPHER_SUITE_WEP104: | |
e9f207f0 | 125 | len = scnprintf(buf, sizeof(buf), "\n"); |
50339a67 | 126 | break; |
97359d12 | 127 | case WLAN_CIPHER_SUITE_TKIP: |
e9f207f0 JB |
128 | for (i = 0; i < NUM_RX_DATA_QUEUES; i++) |
129 | p += scnprintf(p, sizeof(buf)+buf-p, | |
130 | "%08x %04x\n", | |
b0f76b33 HH |
131 | key->u.tkip.rx[i].iv32, |
132 | key->u.tkip.rx[i].iv16); | |
e9f207f0 | 133 | len = p - buf; |
50339a67 | 134 | break; |
97359d12 | 135 | case WLAN_CIPHER_SUITE_CCMP: |
9190252c | 136 | for (i = 0; i < NUM_RX_DATA_QUEUES + 1; i++) { |
e9f207f0 JB |
137 | rpn = key->u.ccmp.rx_pn[i]; |
138 | p += scnprintf(p, sizeof(buf)+buf-p, | |
139 | "%02x%02x%02x%02x%02x%02x\n", | |
140 | rpn[0], rpn[1], rpn[2], | |
141 | rpn[3], rpn[4], rpn[5]); | |
142 | } | |
143 | len = p - buf; | |
50339a67 | 144 | break; |
97359d12 | 145 | case WLAN_CIPHER_SUITE_AES_CMAC: |
3cfcf6ac JM |
146 | rpn = key->u.aes_cmac.rx_pn; |
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 | len = p - buf; | |
152 | break; | |
e9f207f0 JB |
153 | default: |
154 | return 0; | |
155 | } | |
156 | return simple_read_from_buffer(userbuf, count, ppos, buf, len); | |
157 | } | |
158 | KEY_OPS(rx_spec); | |
159 | ||
160 | static ssize_t key_replays_read(struct file *file, char __user *userbuf, | |
161 | size_t count, loff_t *ppos) | |
162 | { | |
163 | struct ieee80211_key *key = file->private_data; | |
164 | char buf[20]; | |
165 | int len; | |
166 | ||
97359d12 JB |
167 | switch (key->conf.cipher) { |
168 | case WLAN_CIPHER_SUITE_CCMP: | |
3cfcf6ac JM |
169 | len = scnprintf(buf, sizeof(buf), "%u\n", key->u.ccmp.replays); |
170 | break; | |
97359d12 | 171 | case WLAN_CIPHER_SUITE_AES_CMAC: |
3cfcf6ac JM |
172 | len = scnprintf(buf, sizeof(buf), "%u\n", |
173 | key->u.aes_cmac.replays); | |
174 | break; | |
175 | default: | |
e9f207f0 | 176 | return 0; |
3cfcf6ac | 177 | } |
e9f207f0 JB |
178 | return simple_read_from_buffer(userbuf, count, ppos, buf, len); |
179 | } | |
180 | KEY_OPS(replays); | |
181 | ||
3cfcf6ac JM |
182 | static ssize_t key_icverrors_read(struct file *file, char __user *userbuf, |
183 | size_t count, loff_t *ppos) | |
184 | { | |
185 | struct ieee80211_key *key = file->private_data; | |
186 | char buf[20]; | |
187 | int len; | |
188 | ||
97359d12 JB |
189 | switch (key->conf.cipher) { |
190 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
3cfcf6ac JM |
191 | len = scnprintf(buf, sizeof(buf), "%u\n", |
192 | key->u.aes_cmac.icverrors); | |
193 | break; | |
194 | default: | |
195 | return 0; | |
196 | } | |
197 | return simple_read_from_buffer(userbuf, count, ppos, buf, len); | |
198 | } | |
199 | KEY_OPS(icverrors); | |
200 | ||
e9f207f0 JB |
201 | static ssize_t key_key_read(struct file *file, char __user *userbuf, |
202 | size_t count, loff_t *ppos) | |
203 | { | |
204 | struct ieee80211_key *key = file->private_data; | |
520efd1a | 205 | int i, bufsize = 2 * key->conf.keylen + 2; |
e9f207f0 JB |
206 | char *buf = kmalloc(bufsize, GFP_KERNEL); |
207 | char *p = buf; | |
520efd1a JJ |
208 | ssize_t res; |
209 | ||
210 | if (!buf) | |
211 | return -ENOMEM; | |
e9f207f0 | 212 | |
8f20fc24 JB |
213 | for (i = 0; i < key->conf.keylen; i++) |
214 | p += scnprintf(p, bufsize + buf - p, "%02x", key->conf.key[i]); | |
e9f207f0 JB |
215 | p += scnprintf(p, bufsize+buf-p, "\n"); |
216 | res = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); | |
217 | kfree(buf); | |
218 | return res; | |
219 | } | |
220 | KEY_OPS(key); | |
221 | ||
222 | #define DEBUGFS_ADD(name) \ | |
7bcfaf2f JB |
223 | debugfs_create_file(#name, 0400, key->debugfs.dir, \ |
224 | key, &key_##name##_ops); | |
e9f207f0 | 225 | |
3b96766f JB |
226 | void ieee80211_debugfs_key_add(struct ieee80211_key *key) |
227 | { | |
50339a67 | 228 | static int keycount; |
3b96766f | 229 | char buf[50]; |
3b96766f | 230 | struct sta_info *sta; |
e9f207f0 | 231 | |
3b96766f | 232 | if (!key->local->debugfs.keys) |
e9f207f0 JB |
233 | return; |
234 | ||
50339a67 | 235 | sprintf(buf, "%d", keycount); |
d9c58f30 | 236 | key->debugfs.cnt = keycount; |
50339a67 | 237 | keycount++; |
e9f207f0 | 238 | key->debugfs.dir = debugfs_create_dir(buf, |
3b96766f | 239 | key->local->debugfs.keys); |
e9f207f0 JB |
240 | |
241 | if (!key->debugfs.dir) | |
242 | return; | |
243 | ||
3b96766f JB |
244 | rcu_read_lock(); |
245 | sta = rcu_dereference(key->sta); | |
246 | if (sta) | |
0c68ae26 | 247 | sprintf(buf, "../../stations/%pM", sta->sta.addr); |
3b96766f JB |
248 | rcu_read_unlock(); |
249 | ||
250 | /* using sta as a boolean is fine outside RCU lock */ | |
251 | if (sta) | |
252 | key->debugfs.stalink = | |
253 | debugfs_create_symlink("station", key->debugfs.dir, buf); | |
254 | ||
e9f207f0 | 255 | DEBUGFS_ADD(keylen); |
8f20fc24 | 256 | DEBUGFS_ADD(flags); |
e9f207f0 JB |
257 | DEBUGFS_ADD(keyidx); |
258 | DEBUGFS_ADD(hw_key_idx); | |
259 | DEBUGFS_ADD(tx_rx_count); | |
260 | DEBUGFS_ADD(algorithm); | |
261 | DEBUGFS_ADD(tx_spec); | |
262 | DEBUGFS_ADD(rx_spec); | |
263 | DEBUGFS_ADD(replays); | |
3cfcf6ac | 264 | DEBUGFS_ADD(icverrors); |
e9f207f0 | 265 | DEBUGFS_ADD(key); |
e7a64f12 | 266 | DEBUGFS_ADD(ifindex); |
e9f207f0 JB |
267 | }; |
268 | ||
e9f207f0 JB |
269 | void ieee80211_debugfs_key_remove(struct ieee80211_key *key) |
270 | { | |
271 | if (!key) | |
272 | return; | |
273 | ||
7bcfaf2f | 274 | debugfs_remove_recursive(key->debugfs.dir); |
e9f207f0 JB |
275 | key->debugfs.dir = NULL; |
276 | } | |
f7e0104c JB |
277 | |
278 | void ieee80211_debugfs_key_update_default(struct ieee80211_sub_if_data *sdata) | |
e9f207f0 JB |
279 | { |
280 | char buf[50]; | |
78520cad | 281 | struct ieee80211_key *key; |
e9f207f0 | 282 | |
7bcfaf2f | 283 | if (!sdata->debugfs.dir) |
e9f207f0 JB |
284 | return; |
285 | ||
f7e0104c | 286 | lockdep_assert_held(&sdata->local->key_mtx); |
78520cad | 287 | |
f7e0104c JB |
288 | if (sdata->default_unicast_key) { |
289 | key = sdata->default_unicast_key; | |
78520cad | 290 | sprintf(buf, "../keys/%d", key->debugfs.cnt); |
f7e0104c JB |
291 | sdata->debugfs.default_unicast_key = |
292 | debugfs_create_symlink("default_unicast_key", | |
7bcfaf2f | 293 | sdata->debugfs.dir, buf); |
f7e0104c JB |
294 | } else { |
295 | debugfs_remove(sdata->debugfs.default_unicast_key); | |
296 | sdata->debugfs.default_unicast_key = NULL; | |
297 | } | |
e9f207f0 | 298 | |
f7e0104c JB |
299 | if (sdata->default_multicast_key) { |
300 | key = sdata->default_multicast_key; | |
301 | sprintf(buf, "../keys/%d", key->debugfs.cnt); | |
302 | sdata->debugfs.default_multicast_key = | |
303 | debugfs_create_symlink("default_multicast_key", | |
304 | sdata->debugfs.dir, buf); | |
305 | } else { | |
306 | debugfs_remove(sdata->debugfs.default_multicast_key); | |
307 | sdata->debugfs.default_multicast_key = NULL; | |
308 | } | |
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 | } |