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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; | |
79 | default: | |
80 | return 0; | |
81 | } | |
82 | return simple_read_from_buffer(userbuf, count, ppos, alg, strlen(alg)); | |
83 | } | |
84 | KEY_OPS(algorithm); | |
85 | ||
86 | static ssize_t key_tx_spec_read(struct file *file, char __user *userbuf, | |
87 | size_t count, loff_t *ppos) | |
88 | { | |
89 | const u8 *tpn; | |
90 | char buf[20]; | |
91 | int len; | |
92 | struct ieee80211_key *key = file->private_data; | |
93 | ||
8f20fc24 | 94 | switch (key->conf.alg) { |
e9f207f0 JB |
95 | case ALG_WEP: |
96 | len = scnprintf(buf, sizeof(buf), "\n"); | |
50339a67 | 97 | break; |
e9f207f0 JB |
98 | case ALG_TKIP: |
99 | len = scnprintf(buf, sizeof(buf), "%08x %04x\n", | |
b0f76b33 HH |
100 | key->u.tkip.tx.iv32, |
101 | key->u.tkip.tx.iv16); | |
50339a67 | 102 | break; |
e9f207f0 JB |
103 | case ALG_CCMP: |
104 | tpn = key->u.ccmp.tx_pn; | |
105 | len = scnprintf(buf, sizeof(buf), "%02x%02x%02x%02x%02x%02x\n", | |
106 | tpn[0], tpn[1], tpn[2], tpn[3], tpn[4], tpn[5]); | |
50339a67 | 107 | break; |
e9f207f0 JB |
108 | default: |
109 | return 0; | |
110 | } | |
111 | return simple_read_from_buffer(userbuf, count, ppos, buf, len); | |
112 | } | |
113 | KEY_OPS(tx_spec); | |
114 | ||
115 | static ssize_t key_rx_spec_read(struct file *file, char __user *userbuf, | |
116 | size_t count, loff_t *ppos) | |
117 | { | |
118 | struct ieee80211_key *key = file->private_data; | |
119 | char buf[14*NUM_RX_DATA_QUEUES+1], *p = buf; | |
120 | int i, len; | |
121 | const u8 *rpn; | |
122 | ||
8f20fc24 | 123 | switch (key->conf.alg) { |
e9f207f0 JB |
124 | case ALG_WEP: |
125 | len = scnprintf(buf, sizeof(buf), "\n"); | |
50339a67 | 126 | break; |
e9f207f0 JB |
127 | case ALG_TKIP: |
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; |
e9f207f0 JB |
135 | case ALG_CCMP: |
136 | for (i = 0; i < NUM_RX_DATA_QUEUES; i++) { | |
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; |
e9f207f0 JB |
145 | default: |
146 | return 0; | |
147 | } | |
148 | return simple_read_from_buffer(userbuf, count, ppos, buf, len); | |
149 | } | |
150 | KEY_OPS(rx_spec); | |
151 | ||
152 | static ssize_t key_replays_read(struct file *file, char __user *userbuf, | |
153 | size_t count, loff_t *ppos) | |
154 | { | |
155 | struct ieee80211_key *key = file->private_data; | |
156 | char buf[20]; | |
157 | int len; | |
158 | ||
8f20fc24 | 159 | if (key->conf.alg != ALG_CCMP) |
e9f207f0 JB |
160 | return 0; |
161 | len = scnprintf(buf, sizeof(buf), "%u\n", key->u.ccmp.replays); | |
162 | return simple_read_from_buffer(userbuf, count, ppos, buf, len); | |
163 | } | |
164 | KEY_OPS(replays); | |
165 | ||
166 | static ssize_t key_key_read(struct file *file, char __user *userbuf, | |
167 | size_t count, loff_t *ppos) | |
168 | { | |
169 | struct ieee80211_key *key = file->private_data; | |
8f20fc24 | 170 | int i, res, bufsize = 2 * key->conf.keylen + 2; |
e9f207f0 JB |
171 | char *buf = kmalloc(bufsize, GFP_KERNEL); |
172 | char *p = buf; | |
173 | ||
8f20fc24 JB |
174 | for (i = 0; i < key->conf.keylen; i++) |
175 | p += scnprintf(p, bufsize + buf - p, "%02x", key->conf.key[i]); | |
e9f207f0 JB |
176 | p += scnprintf(p, bufsize+buf-p, "\n"); |
177 | res = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); | |
178 | kfree(buf); | |
179 | return res; | |
180 | } | |
181 | KEY_OPS(key); | |
182 | ||
183 | #define DEBUGFS_ADD(name) \ | |
184 | key->debugfs.name = debugfs_create_file(#name, 0400,\ | |
185 | key->debugfs.dir, key, &key_##name##_ops); | |
186 | ||
3b96766f JB |
187 | void ieee80211_debugfs_key_add(struct ieee80211_key *key) |
188 | { | |
50339a67 | 189 | static int keycount; |
3b96766f | 190 | char buf[50]; |
3b96766f | 191 | struct sta_info *sta; |
e9f207f0 | 192 | |
3b96766f | 193 | if (!key->local->debugfs.keys) |
e9f207f0 JB |
194 | return; |
195 | ||
50339a67 | 196 | sprintf(buf, "%d", keycount); |
d9c58f30 | 197 | key->debugfs.cnt = keycount; |
50339a67 | 198 | keycount++; |
e9f207f0 | 199 | key->debugfs.dir = debugfs_create_dir(buf, |
3b96766f | 200 | key->local->debugfs.keys); |
e9f207f0 JB |
201 | |
202 | if (!key->debugfs.dir) | |
203 | return; | |
204 | ||
3b96766f JB |
205 | rcu_read_lock(); |
206 | sta = rcu_dereference(key->sta); | |
207 | if (sta) | |
0c68ae26 | 208 | sprintf(buf, "../../stations/%pM", sta->sta.addr); |
3b96766f JB |
209 | rcu_read_unlock(); |
210 | ||
211 | /* using sta as a boolean is fine outside RCU lock */ | |
212 | if (sta) | |
213 | key->debugfs.stalink = | |
214 | debugfs_create_symlink("station", key->debugfs.dir, buf); | |
215 | ||
e9f207f0 | 216 | DEBUGFS_ADD(keylen); |
8f20fc24 | 217 | DEBUGFS_ADD(flags); |
e9f207f0 JB |
218 | DEBUGFS_ADD(keyidx); |
219 | DEBUGFS_ADD(hw_key_idx); | |
220 | DEBUGFS_ADD(tx_rx_count); | |
221 | DEBUGFS_ADD(algorithm); | |
222 | DEBUGFS_ADD(tx_spec); | |
223 | DEBUGFS_ADD(rx_spec); | |
224 | DEBUGFS_ADD(replays); | |
225 | DEBUGFS_ADD(key); | |
e7a64f12 | 226 | DEBUGFS_ADD(ifindex); |
e9f207f0 JB |
227 | }; |
228 | ||
229 | #define DEBUGFS_DEL(name) \ | |
230 | debugfs_remove(key->debugfs.name); key->debugfs.name = NULL; | |
231 | ||
232 | void ieee80211_debugfs_key_remove(struct ieee80211_key *key) | |
233 | { | |
234 | if (!key) | |
235 | return; | |
236 | ||
237 | DEBUGFS_DEL(keylen); | |
8f20fc24 | 238 | DEBUGFS_DEL(flags); |
e9f207f0 JB |
239 | DEBUGFS_DEL(keyidx); |
240 | DEBUGFS_DEL(hw_key_idx); | |
241 | DEBUGFS_DEL(tx_rx_count); | |
242 | DEBUGFS_DEL(algorithm); | |
243 | DEBUGFS_DEL(tx_spec); | |
244 | DEBUGFS_DEL(rx_spec); | |
245 | DEBUGFS_DEL(replays); | |
246 | DEBUGFS_DEL(key); | |
e7a64f12 | 247 | DEBUGFS_DEL(ifindex); |
e9f207f0 JB |
248 | |
249 | debugfs_remove(key->debugfs.stalink); | |
250 | key->debugfs.stalink = NULL; | |
251 | debugfs_remove(key->debugfs.dir); | |
252 | key->debugfs.dir = NULL; | |
253 | } | |
254 | void ieee80211_debugfs_key_add_default(struct ieee80211_sub_if_data *sdata) | |
255 | { | |
256 | char buf[50]; | |
78520cad | 257 | struct ieee80211_key *key; |
e9f207f0 JB |
258 | |
259 | if (!sdata->debugfsdir) | |
260 | return; | |
261 | ||
78520cad JB |
262 | /* this is running under the key lock */ |
263 | ||
264 | key = sdata->default_key; | |
265 | if (key) { | |
266 | sprintf(buf, "../keys/%d", key->debugfs.cnt); | |
2b58b209 | 267 | sdata->common_debugfs.default_key = |
78520cad JB |
268 | debugfs_create_symlink("default_key", |
269 | sdata->debugfsdir, buf); | |
270 | } else | |
271 | ieee80211_debugfs_key_remove_default(sdata); | |
e9f207f0 | 272 | } |
78520cad | 273 | |
e9f207f0 JB |
274 | void ieee80211_debugfs_key_remove_default(struct ieee80211_sub_if_data *sdata) |
275 | { | |
276 | if (!sdata) | |
277 | return; | |
278 | ||
2b58b209 JM |
279 | debugfs_remove(sdata->common_debugfs.default_key); |
280 | sdata->common_debugfs.default_key = NULL; | |
e9f207f0 | 281 | } |
e9f207f0 JB |
282 | |
283 | void ieee80211_debugfs_key_sta_del(struct ieee80211_key *key, | |
284 | struct sta_info *sta) | |
285 | { | |
286 | debugfs_remove(key->debugfs.stalink); | |
287 | key->debugfs.stalink = NULL; | |
288 | } |