dccp: Auto-load (when supported) CCID plugins for negotiation
[linux-2.6.git] / net / mac80211 / debugfs_key.c
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"
13 #include "key.h"
14 #include "debugfs.h"
15 #include "debugfs_key.h"
16
17 #define KEY_READ(name, prop, buflen, format_string)                     \
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;                 \
24         int res = scnprintf(buf, buflen, format_string, key->prop);     \
25         return simple_read_from_buffer(userbuf, count, ppos, buf, res); \
26 }
27 #define KEY_READ_D(name) KEY_READ(name, name, 20, "%d\n")
28 #define KEY_READ_X(name) KEY_READ(name, name, 20, "0x%x\n")
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
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")
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);
57 KEY_FILE(flags, X);
58 KEY_FILE(tx_rx_count, D);
59 KEY_READ(ifindex, sdata->dev->ifindex, 20, "%d\n");
60 KEY_OPS(ifindex);
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
69         switch (key->conf.alg) {
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
94         switch (key->conf.alg) {
95         case ALG_WEP:
96                 len = scnprintf(buf, sizeof(buf), "\n");
97                 break;
98         case ALG_TKIP:
99                 len = scnprintf(buf, sizeof(buf), "%08x %04x\n",
100                                 key->u.tkip.tx.iv32,
101                                 key->u.tkip.tx.iv16);
102                 break;
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]);
107                 break;
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
123         switch (key->conf.alg) {
124         case ALG_WEP:
125                 len = scnprintf(buf, sizeof(buf), "\n");
126                 break;
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",
131                                        key->u.tkip.rx[i].iv32,
132                                        key->u.tkip.rx[i].iv16);
133                 len = p - buf;
134                 break;
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;
144                 break;
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
159         if (key->conf.alg != ALG_CCMP)
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;
170         int i, res, bufsize = 2 * key->conf.keylen + 2;
171         char *buf = kmalloc(bufsize, GFP_KERNEL);
172         char *p = buf;
173
174         for (i = 0; i < key->conf.keylen; i++)
175                 p += scnprintf(p, bufsize + buf - p, "%02x", key->conf.key[i]);
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
187 void ieee80211_debugfs_key_add(struct ieee80211_key *key)
188   {
189         static int keycount;
190         char buf[50];
191         DECLARE_MAC_BUF(mac);
192         struct sta_info *sta;
193
194         if (!key->local->debugfs.keys)
195                 return;
196
197         sprintf(buf, "%d", keycount);
198         key->debugfs.cnt = keycount;
199         keycount++;
200         key->debugfs.dir = debugfs_create_dir(buf,
201                                         key->local->debugfs.keys);
202
203         if (!key->debugfs.dir)
204                 return;
205
206         rcu_read_lock();
207         sta = rcu_dereference(key->sta);
208         if (sta)
209                 sprintf(buf, "../../stations/%s", print_mac(mac, sta->addr));
210         rcu_read_unlock();
211
212         /* using sta as a boolean is fine outside RCU lock */
213         if (sta)
214                 key->debugfs.stalink =
215                         debugfs_create_symlink("station", key->debugfs.dir, buf);
216
217         DEBUGFS_ADD(keylen);
218         DEBUGFS_ADD(flags);
219         DEBUGFS_ADD(keyidx);
220         DEBUGFS_ADD(hw_key_idx);
221         DEBUGFS_ADD(tx_rx_count);
222         DEBUGFS_ADD(algorithm);
223         DEBUGFS_ADD(tx_spec);
224         DEBUGFS_ADD(rx_spec);
225         DEBUGFS_ADD(replays);
226         DEBUGFS_ADD(key);
227         DEBUGFS_ADD(ifindex);
228 };
229
230 #define DEBUGFS_DEL(name) \
231         debugfs_remove(key->debugfs.name); key->debugfs.name = NULL;
232
233 void ieee80211_debugfs_key_remove(struct ieee80211_key *key)
234 {
235         if (!key)
236                 return;
237
238         DEBUGFS_DEL(keylen);
239         DEBUGFS_DEL(flags);
240         DEBUGFS_DEL(keyidx);
241         DEBUGFS_DEL(hw_key_idx);
242         DEBUGFS_DEL(tx_rx_count);
243         DEBUGFS_DEL(algorithm);
244         DEBUGFS_DEL(tx_spec);
245         DEBUGFS_DEL(rx_spec);
246         DEBUGFS_DEL(replays);
247         DEBUGFS_DEL(key);
248         DEBUGFS_DEL(ifindex);
249
250         debugfs_remove(key->debugfs.stalink);
251         key->debugfs.stalink = NULL;
252         debugfs_remove(key->debugfs.dir);
253         key->debugfs.dir = NULL;
254 }
255 void ieee80211_debugfs_key_add_default(struct ieee80211_sub_if_data *sdata)
256 {
257         char buf[50];
258         struct ieee80211_key *key;
259
260         if (!sdata->debugfsdir)
261                 return;
262
263         /* this is running under the key lock */
264
265         key = sdata->default_key;
266         if (key) {
267                 sprintf(buf, "../keys/%d", key->debugfs.cnt);
268                 sdata->common_debugfs.default_key =
269                         debugfs_create_symlink("default_key",
270                                                sdata->debugfsdir, buf);
271         } else
272                 ieee80211_debugfs_key_remove_default(sdata);
273 }
274
275 void ieee80211_debugfs_key_remove_default(struct ieee80211_sub_if_data *sdata)
276 {
277         if (!sdata)
278                 return;
279
280         debugfs_remove(sdata->common_debugfs.default_key);
281         sdata->common_debugfs.default_key = NULL;
282 }
283
284 void ieee80211_debugfs_key_sta_del(struct ieee80211_key *key,
285                                    struct sta_info *sta)
286 {
287         debugfs_remove(key->debugfs.stalink);
288         key->debugfs.stalink = NULL;
289 }