Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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 <linux/slab.h>
13#include "ieee80211_i.h"
14#include "key.h"
15#include "debugfs.h"
16#include "debugfs_key.h"
17
18#define KEY_READ(name, prop, format_string) \
19static ssize_t key_##name##_read(struct file *file, \
20 char __user *userbuf, \
21 size_t count, loff_t *ppos) \
22{ \
23 struct ieee80211_key *key = file->private_data; \
24 return mac80211_format_buffer(userbuf, count, ppos, \
25 format_string, key->prop); \
26}
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")
29
30#define KEY_OPS(name) \
31static const struct file_operations key_ ##name## _ops = { \
32 .read = key_##name##_read, \
33 .open = mac80211_open_file_generic, \
34 .llseek = generic_file_llseek, \
35}
36
37#define KEY_FILE(name, format) \
38 KEY_READ_##format(name) \
39 KEY_OPS(name)
40
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")
44
45#define KEY_CONF_OPS(name) \
46static const struct file_operations key_ ##name## _ops = { \
47 .read = key_conf_##name##_read, \
48 .open = mac80211_open_file_generic, \
49 .llseek = generic_file_llseek, \
50}
51
52#define KEY_CONF_FILE(name, format) \
53 KEY_CONF_READ_##format(name) \
54 KEY_CONF_OPS(name)
55
56KEY_CONF_FILE(keylen, D);
57KEY_CONF_FILE(keyidx, D);
58KEY_CONF_FILE(hw_key_idx, D);
59KEY_FILE(flags, X);
60KEY_FILE(tx_rx_count, D);
61KEY_READ(ifindex, sdata->name, "%s\n");
62KEY_OPS(ifindex);
63
64static ssize_t key_algorithm_read(struct file *file,
65 char __user *userbuf,
66 size_t count, loff_t *ppos)
67{
68 char buf[15];
69 struct ieee80211_key *key = file->private_data;
70 u32 c = key->conf.cipher;
71
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));
75}
76KEY_OPS(algorithm);
77
78static ssize_t key_tx_spec_read(struct file *file, char __user *userbuf,
79 size_t count, loff_t *ppos)
80{
81 u64 pn;
82 char buf[20];
83 int len;
84 struct ieee80211_key *key = file->private_data;
85
86 switch (key->conf.cipher) {
87 case WLAN_CIPHER_SUITE_WEP40:
88 case WLAN_CIPHER_SUITE_WEP104:
89 len = scnprintf(buf, sizeof(buf), "\n");
90 break;
91 case WLAN_CIPHER_SUITE_TKIP:
92 len = scnprintf(buf, sizeof(buf), "%08x %04x\n",
93 key->u.tkip.tx.iv32,
94 key->u.tkip.tx.iv16);
95 break;
96 case WLAN_CIPHER_SUITE_CCMP:
97 pn = atomic64_read(&key->u.ccmp.tx_pn);
98 len = scnprintf(buf, sizeof(buf), "%02x%02x%02x%02x%02x%02x\n",
99 (u8)(pn >> 40), (u8)(pn >> 32), (u8)(pn >> 24),
100 (u8)(pn >> 16), (u8)(pn >> 8), (u8)pn);
101 break;
102 case WLAN_CIPHER_SUITE_AES_CMAC:
103 pn = atomic64_read(&key->u.aes_cmac.tx_pn);
104 len = scnprintf(buf, sizeof(buf), "%02x%02x%02x%02x%02x%02x\n",
105 (u8)(pn >> 40), (u8)(pn >> 32), (u8)(pn >> 24),
106 (u8)(pn >> 16), (u8)(pn >> 8), (u8)pn);
107 break;
108 default:
109 return 0;
110 }
111 return simple_read_from_buffer(userbuf, count, ppos, buf, len);
112}
113KEY_OPS(tx_spec);
114
115static 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
123 switch (key->conf.cipher) {
124 case WLAN_CIPHER_SUITE_WEP40:
125 case WLAN_CIPHER_SUITE_WEP104:
126 len = scnprintf(buf, sizeof(buf), "\n");
127 break;
128 case WLAN_CIPHER_SUITE_TKIP:
129 for (i = 0; i < NUM_RX_DATA_QUEUES; i++)
130 p += scnprintf(p, sizeof(buf)+buf-p,
131 "%08x %04x\n",
132 key->u.tkip.rx[i].iv32,
133 key->u.tkip.rx[i].iv16);
134 len = p - buf;
135 break;
136 case WLAN_CIPHER_SUITE_CCMP:
137 for (i = 0; i < NUM_RX_DATA_QUEUES + 1; i++) {
138 rpn = key->u.ccmp.rx_pn[i];
139 p += scnprintf(p, sizeof(buf)+buf-p,
140 "%02x%02x%02x%02x%02x%02x\n",
141 rpn[0], rpn[1], rpn[2],
142 rpn[3], rpn[4], rpn[5]);
143 }
144 len = p - buf;
145 break;
146 case WLAN_CIPHER_SUITE_AES_CMAC:
147 rpn = key->u.aes_cmac.rx_pn;
148 p += scnprintf(p, sizeof(buf)+buf-p,
149 "%02x%02x%02x%02x%02x%02x\n",
150 rpn[0], rpn[1], rpn[2],
151 rpn[3], rpn[4], rpn[5]);
152 len = p - buf;
153 break;
154 default:
155 return 0;
156 }
157 return simple_read_from_buffer(userbuf, count, ppos, buf, len);
158}
159KEY_OPS(rx_spec);
160
161static ssize_t key_replays_read(struct file *file, char __user *userbuf,
162 size_t count, loff_t *ppos)
163{
164 struct ieee80211_key *key = file->private_data;
165 char buf[20];
166 int len;
167
168 switch (key->conf.cipher) {
169 case WLAN_CIPHER_SUITE_CCMP:
170 len = scnprintf(buf, sizeof(buf), "%u\n", key->u.ccmp.replays);
171 break;
172 case WLAN_CIPHER_SUITE_AES_CMAC:
173 len = scnprintf(buf, sizeof(buf), "%u\n",
174 key->u.aes_cmac.replays);
175 break;
176 default:
177 return 0;
178 }
179 return simple_read_from_buffer(userbuf, count, ppos, buf, len);
180}
181KEY_OPS(replays);
182
183static ssize_t key_icverrors_read(struct file *file, char __user *userbuf,
184 size_t count, loff_t *ppos)
185{
186 struct ieee80211_key *key = file->private_data;
187 char buf[20];
188 int len;
189
190 switch (key->conf.cipher) {
191 case WLAN_CIPHER_SUITE_AES_CMAC:
192 len = scnprintf(buf, sizeof(buf), "%u\n",
193 key->u.aes_cmac.icverrors);
194 break;
195 default:
196 return 0;
197 }
198 return simple_read_from_buffer(userbuf, count, ppos, buf, len);
199}
200KEY_OPS(icverrors);
201
202static ssize_t key_key_read(struct file *file, char __user *userbuf,
203 size_t count, loff_t *ppos)
204{
205 struct ieee80211_key *key = file->private_data;
206 int i, bufsize = 2 * key->conf.keylen + 2;
207 char *buf = kmalloc(bufsize, GFP_KERNEL);
208 char *p = buf;
209 ssize_t res;
210
211 if (!buf)
212 return -ENOMEM;
213
214 for (i = 0; i < key->conf.keylen; i++)
215 p += scnprintf(p, bufsize + buf - p, "%02x", key->conf.key[i]);
216 p += scnprintf(p, bufsize+buf-p, "\n");
217 res = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
218 kfree(buf);
219 return res;
220}
221KEY_OPS(key);
222
223#define DEBUGFS_ADD(name) \
224 debugfs_create_file(#name, 0400, key->debugfs.dir, \
225 key, &key_##name##_ops);
226
227void ieee80211_debugfs_key_add(struct ieee80211_key *key)
228 {
229 static int keycount;
230 char buf[50];
231 struct sta_info *sta;
232
233 if (!key->local->debugfs.keys)
234 return;
235
236 sprintf(buf, "%d", keycount);
237 key->debugfs.cnt = keycount;
238 keycount++;
239 key->debugfs.dir = debugfs_create_dir(buf,
240 key->local->debugfs.keys);
241
242 if (!key->debugfs.dir)
243 return;
244
245 sta = key->sta;
246 if (sta) {
247 sprintf(buf, "../../stations/%pM", sta->sta.addr);
248 key->debugfs.stalink =
249 debugfs_create_symlink("station", key->debugfs.dir, buf);
250 }
251
252 DEBUGFS_ADD(keylen);
253 DEBUGFS_ADD(flags);
254 DEBUGFS_ADD(keyidx);
255 DEBUGFS_ADD(hw_key_idx);
256 DEBUGFS_ADD(tx_rx_count);
257 DEBUGFS_ADD(algorithm);
258 DEBUGFS_ADD(tx_spec);
259 DEBUGFS_ADD(rx_spec);
260 DEBUGFS_ADD(replays);
261 DEBUGFS_ADD(icverrors);
262 DEBUGFS_ADD(key);
263 DEBUGFS_ADD(ifindex);
264};
265
266void ieee80211_debugfs_key_remove(struct ieee80211_key *key)
267{
268 if (!key)
269 return;
270
271 debugfs_remove_recursive(key->debugfs.dir);
272 key->debugfs.dir = NULL;
273}
274
275void ieee80211_debugfs_key_update_default(struct ieee80211_sub_if_data *sdata)
276{
277 char buf[50];
278 struct ieee80211_key *key;
279
280 if (!sdata->debugfs.dir)
281 return;
282
283 lockdep_assert_held(&sdata->local->key_mtx);
284
285 if (sdata->default_unicast_key) {
286 key = key_mtx_dereference(sdata->local,
287 sdata->default_unicast_key);
288 sprintf(buf, "../keys/%d", key->debugfs.cnt);
289 sdata->debugfs.default_unicast_key =
290 debugfs_create_symlink("default_unicast_key",
291 sdata->debugfs.dir, buf);
292 } else {
293 debugfs_remove(sdata->debugfs.default_unicast_key);
294 sdata->debugfs.default_unicast_key = NULL;
295 }
296
297 if (sdata->default_multicast_key) {
298 key = key_mtx_dereference(sdata->local,
299 sdata->default_multicast_key);
300 sprintf(buf, "../keys/%d", key->debugfs.cnt);
301 sdata->debugfs.default_multicast_key =
302 debugfs_create_symlink("default_multicast_key",
303 sdata->debugfs.dir, buf);
304 } else {
305 debugfs_remove(sdata->debugfs.default_multicast_key);
306 sdata->debugfs.default_multicast_key = NULL;
307 }
308}
309
310void ieee80211_debugfs_key_add_mgmt_default(struct ieee80211_sub_if_data *sdata)
311{
312 char buf[50];
313 struct ieee80211_key *key;
314
315 if (!sdata->debugfs.dir)
316 return;
317
318 key = key_mtx_dereference(sdata->local,
319 sdata->default_mgmt_key);
320 if (key) {
321 sprintf(buf, "../keys/%d", key->debugfs.cnt);
322 sdata->debugfs.default_mgmt_key =
323 debugfs_create_symlink("default_mgmt_key",
324 sdata->debugfs.dir, buf);
325 } else
326 ieee80211_debugfs_key_remove_mgmt_default(sdata);
327}
328
329void ieee80211_debugfs_key_remove_mgmt_default(struct ieee80211_sub_if_data *sdata)
330{
331 if (!sdata)
332 return;
333
334 debugfs_remove(sdata->debugfs.default_mgmt_key);
335 sdata->debugfs.default_mgmt_key = NULL;
336}
337
338void ieee80211_debugfs_key_sta_del(struct ieee80211_key *key,
339 struct sta_info *sta)
340{
341 debugfs_remove(key->debugfs.stalink);
342 key->debugfs.stalink = NULL;
343}