Merge branch 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6
[linux-2.6] / 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 "ieee80211_key.h"
14 #include "debugfs.h"
15 #include "debugfs_key.h"
16
17 #define KEY_READ(name, 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->name);     \
25         return simple_read_from_buffer(userbuf, count, ppos, buf, res); \
26 }
27 #define KEY_READ_D(name) KEY_READ(name, 20, "%d\n")
28
29 #define KEY_OPS(name)                                                   \
30 static const struct file_operations key_ ##name## _ops = {              \
31         .read = key_##name##_read,                                      \
32         .open = mac80211_open_file_generic,                             \
33 }
34
35 #define KEY_FILE(name, format)                                          \
36                  KEY_READ_##format(name)                                \
37                  KEY_OPS(name)
38
39 KEY_FILE(keylen, D);
40 KEY_FILE(force_sw_encrypt, D);
41 KEY_FILE(keyidx, D);
42 KEY_FILE(hw_key_idx, D);
43 KEY_FILE(tx_rx_count, D);
44
45 static ssize_t key_algorithm_read(struct file *file,
46                                   char __user *userbuf,
47                                   size_t count, loff_t *ppos)
48 {
49         char *alg;
50         struct ieee80211_key *key = file->private_data;
51
52         switch (key->alg) {
53         case ALG_WEP:
54                 alg = "WEP\n";
55                 break;
56         case ALG_TKIP:
57                 alg = "TKIP\n";
58                 break;
59         case ALG_CCMP:
60                 alg = "CCMP\n";
61                 break;
62         default:
63                 return 0;
64         }
65         return simple_read_from_buffer(userbuf, count, ppos, alg, strlen(alg));
66 }
67 KEY_OPS(algorithm);
68
69 static ssize_t key_tx_spec_read(struct file *file, char __user *userbuf,
70                                 size_t count, loff_t *ppos)
71 {
72         const u8 *tpn;
73         char buf[20];
74         int len;
75         struct ieee80211_key *key = file->private_data;
76
77         switch (key->alg) {
78         case ALG_WEP:
79                 len = scnprintf(buf, sizeof(buf), "\n");
80         case ALG_TKIP:
81                 len = scnprintf(buf, sizeof(buf), "%08x %04x\n",
82                                 key->u.tkip.iv32,
83                                 key->u.tkip.iv16);
84         case ALG_CCMP:
85                 tpn = key->u.ccmp.tx_pn;
86                 len = scnprintf(buf, sizeof(buf), "%02x%02x%02x%02x%02x%02x\n",
87                                 tpn[0], tpn[1], tpn[2], tpn[3], tpn[4], tpn[5]);
88         default:
89                 return 0;
90         }
91         return simple_read_from_buffer(userbuf, count, ppos, buf, len);
92 }
93 KEY_OPS(tx_spec);
94
95 static ssize_t key_rx_spec_read(struct file *file, char __user *userbuf,
96                                 size_t count, loff_t *ppos)
97 {
98         struct ieee80211_key *key = file->private_data;
99         char buf[14*NUM_RX_DATA_QUEUES+1], *p = buf;
100         int i, len;
101         const u8 *rpn;
102
103         switch (key->alg) {
104         case ALG_WEP:
105                 len = scnprintf(buf, sizeof(buf), "\n");
106         case ALG_TKIP:
107                 for (i = 0; i < NUM_RX_DATA_QUEUES; i++)
108                         p += scnprintf(p, sizeof(buf)+buf-p,
109                                        "%08x %04x\n",
110                                        key->u.tkip.iv32_rx[i],
111                                        key->u.tkip.iv16_rx[i]);
112                 len = p - buf;
113         case ALG_CCMP:
114                 for (i = 0; i < NUM_RX_DATA_QUEUES; i++) {
115                         rpn = key->u.ccmp.rx_pn[i];
116                         p += scnprintf(p, sizeof(buf)+buf-p,
117                                        "%02x%02x%02x%02x%02x%02x\n",
118                                        rpn[0], rpn[1], rpn[2],
119                                        rpn[3], rpn[4], rpn[5]);
120                 }
121                 len = p - buf;
122         default:
123                 return 0;
124         }
125         return simple_read_from_buffer(userbuf, count, ppos, buf, len);
126 }
127 KEY_OPS(rx_spec);
128
129 static ssize_t key_replays_read(struct file *file, char __user *userbuf,
130                                 size_t count, loff_t *ppos)
131 {
132         struct ieee80211_key *key = file->private_data;
133         char buf[20];
134         int len;
135
136         if (key->alg != ALG_CCMP)
137                 return 0;
138         len = scnprintf(buf, sizeof(buf), "%u\n", key->u.ccmp.replays);
139         return simple_read_from_buffer(userbuf, count, ppos, buf, len);
140 }
141 KEY_OPS(replays);
142
143 static ssize_t key_key_read(struct file *file, char __user *userbuf,
144                             size_t count, loff_t *ppos)
145 {
146         struct ieee80211_key *key = file->private_data;
147         int i, res, bufsize = 2*key->keylen+2;
148         char *buf = kmalloc(bufsize, GFP_KERNEL);
149         char *p = buf;
150
151         for (i = 0; i < key->keylen; i++)
152                 p += scnprintf(p, bufsize+buf-p, "%02x", key->key[i]);
153         p += scnprintf(p, bufsize+buf-p, "\n");
154         res = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
155         kfree(buf);
156         return res;
157 }
158 KEY_OPS(key);
159
160 #define DEBUGFS_ADD(name) \
161         key->debugfs.name = debugfs_create_file(#name, 0400,\
162                                 key->debugfs.dir, key, &key_##name##_ops);
163
164 void ieee80211_debugfs_key_add(struct ieee80211_local *local,
165                                struct ieee80211_key *key)
166 {
167         char buf[20];
168
169         if (!local->debugfs.keys)
170                 return;
171
172         sprintf(buf, "%d", key->keyidx);
173         key->debugfs.dir = debugfs_create_dir(buf,
174                                         local->debugfs.keys);
175
176         if (!key->debugfs.dir)
177                 return;
178
179         DEBUGFS_ADD(keylen);
180         DEBUGFS_ADD(force_sw_encrypt);
181         DEBUGFS_ADD(keyidx);
182         DEBUGFS_ADD(hw_key_idx);
183         DEBUGFS_ADD(tx_rx_count);
184         DEBUGFS_ADD(algorithm);
185         DEBUGFS_ADD(tx_spec);
186         DEBUGFS_ADD(rx_spec);
187         DEBUGFS_ADD(replays);
188         DEBUGFS_ADD(key);
189 };
190
191 #define DEBUGFS_DEL(name) \
192         debugfs_remove(key->debugfs.name); key->debugfs.name = NULL;
193
194 void ieee80211_debugfs_key_remove(struct ieee80211_key *key)
195 {
196         if (!key)
197                 return;
198
199         DEBUGFS_DEL(keylen);
200         DEBUGFS_DEL(force_sw_encrypt);
201         DEBUGFS_DEL(keyidx);
202         DEBUGFS_DEL(hw_key_idx);
203         DEBUGFS_DEL(tx_rx_count);
204         DEBUGFS_DEL(algorithm);
205         DEBUGFS_DEL(tx_spec);
206         DEBUGFS_DEL(rx_spec);
207         DEBUGFS_DEL(replays);
208         DEBUGFS_DEL(key);
209
210         debugfs_remove(key->debugfs.stalink);
211         key->debugfs.stalink = NULL;
212         debugfs_remove(key->debugfs.dir);
213         key->debugfs.dir = NULL;
214 }
215 void ieee80211_debugfs_key_add_default(struct ieee80211_sub_if_data *sdata)
216 {
217         char buf[50];
218
219         if (!sdata->debugfsdir)
220                 return;
221
222         sprintf(buf, "../keys/%d", sdata->default_key->keyidx);
223         sdata->debugfs.default_key =
224                 debugfs_create_symlink("default_key", sdata->debugfsdir, buf);
225 }
226 void ieee80211_debugfs_key_remove_default(struct ieee80211_sub_if_data *sdata)
227 {
228         if (!sdata)
229                 return;
230
231         debugfs_remove(sdata->debugfs.default_key);
232         sdata->debugfs.default_key = NULL;
233 }
234 void ieee80211_debugfs_key_sta_link(struct ieee80211_key *key,
235                                     struct sta_info *sta)
236 {
237         char buf[50];
238
239         if (!key->debugfs.dir)
240                 return;
241
242         sprintf(buf, "../sta/" MAC_FMT, MAC_ARG(sta->addr));
243         key->debugfs.stalink =
244                 debugfs_create_symlink("station", key->debugfs.dir, buf);
245 }
246
247 void ieee80211_debugfs_key_sta_del(struct ieee80211_key *key,
248                                    struct sta_info *sta)
249 {
250         debugfs_remove(key->debugfs.stalink);
251         key->debugfs.stalink = NULL;
252 }