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, buflen, format_string) \ 19 static ssize_t key_##name##_read(struct file *file, \ 20 char __user *userbuf, \ 21 size_t count, loff_t *ppos) \ 22 { \ 23 char buf[buflen]; \ 24 struct ieee80211_key *key = file->private_data; \ 25 int res = scnprintf(buf, buflen, format_string, key->prop); \ 26 return simple_read_from_buffer(userbuf, count, ppos, buf, res); \ 27 } 28 #define KEY_READ_D(name) KEY_READ(name, name, 20, "%d\n") 29 #define KEY_READ_X(name) KEY_READ(name, name, 20, "0x%x\n") 30 31 #define KEY_OPS(name) \ 32 static const struct file_operations key_ ##name## _ops = { \ 33 .read = key_##name##_read, \ 34 .open = mac80211_open_file_generic, \ 35 } 36 37 #define KEY_FILE(name, format) \ 38 KEY_READ_##format(name) \ 39 KEY_OPS(name) 40 41 #define KEY_CONF_READ(name, buflen, format_string) \ 42 KEY_READ(conf_##name, conf.name, buflen, format_string) 43 #define KEY_CONF_READ_D(name) KEY_CONF_READ(name, 20, "%d\n") 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, \ 49 } 50 51 #define KEY_CONF_FILE(name, format) \ 52 KEY_CONF_READ_##format(name) \ 53 KEY_CONF_OPS(name) 54 55 KEY_CONF_FILE(keylen, D); 56 KEY_CONF_FILE(keyidx, D); 57 KEY_CONF_FILE(hw_key_idx, D); 58 KEY_FILE(flags, X); 59 KEY_FILE(tx_rx_count, D); 60 KEY_READ(ifindex, sdata->name, IFNAMSIZ + 2, "%s\n"); 61 KEY_OPS(ifindex); 62 63 static ssize_t key_algorithm_read(struct file *file, 64 char __user *userbuf, 65 size_t count, loff_t *ppos) 66 { 67 char *alg; 68 struct ieee80211_key *key = file->private_data; 69 70 switch (key->conf.alg) { 71 case ALG_WEP: 72 alg = "WEP\n"; 73 break; 74 case ALG_TKIP: 75 alg = "TKIP\n"; 76 break; 77 case ALG_CCMP: 78 alg = "CCMP\n"; 79 break; 80 case ALG_AES_CMAC: 81 alg = "AES-128-CMAC\n"; 82 break; 83 default: 84 return 0; 85 } 86 return simple_read_from_buffer(userbuf, count, ppos, alg, strlen(alg)); 87 } 88 KEY_OPS(algorithm); 89 90 static ssize_t key_tx_spec_read(struct file *file, char __user *userbuf, 91 size_t count, loff_t *ppos) 92 { 93 const u8 *tpn; 94 char buf[20]; 95 int len; 96 struct ieee80211_key *key = file->private_data; 97 98 switch (key->conf.alg) { 99 case ALG_WEP: 100 len = scnprintf(buf, sizeof(buf), "\n"); 101 break; 102 case ALG_TKIP: 103 len = scnprintf(buf, sizeof(buf), "%08x %04x\n", 104 key->u.tkip.tx.iv32, 105 key->u.tkip.tx.iv16); 106 break; 107 case ALG_CCMP: 108 tpn = key->u.ccmp.tx_pn; 109 len = scnprintf(buf, sizeof(buf), "%02x%02x%02x%02x%02x%02x\n", 110 tpn[0], tpn[1], tpn[2], tpn[3], tpn[4], tpn[5]); 111 break; 112 case ALG_AES_CMAC: 113 tpn = key->u.aes_cmac.tx_pn; 114 len = scnprintf(buf, sizeof(buf), "%02x%02x%02x%02x%02x%02x\n", 115 tpn[0], tpn[1], tpn[2], tpn[3], tpn[4], 116 tpn[5]); 117 break; 118 default: 119 return 0; 120 } 121 return simple_read_from_buffer(userbuf, count, ppos, buf, len); 122 } 123 KEY_OPS(tx_spec); 124 125 static ssize_t key_rx_spec_read(struct file *file, char __user *userbuf, 126 size_t count, loff_t *ppos) 127 { 128 struct ieee80211_key *key = file->private_data; 129 char buf[14*NUM_RX_DATA_QUEUES+1], *p = buf; 130 int i, len; 131 const u8 *rpn; 132 133 switch (key->conf.alg) { 134 case ALG_WEP: 135 len = scnprintf(buf, sizeof(buf), "\n"); 136 break; 137 case ALG_TKIP: 138 for (i = 0; i < NUM_RX_DATA_QUEUES; i++) 139 p += scnprintf(p, sizeof(buf)+buf-p, 140 "%08x %04x\n", 141 key->u.tkip.rx[i].iv32, 142 key->u.tkip.rx[i].iv16); 143 len = p - buf; 144 break; 145 case ALG_CCMP: 146 for (i = 0; i < NUM_RX_DATA_QUEUES + 1; i++) { 147 rpn = key->u.ccmp.rx_pn[i]; 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 } 153 len = p - buf; 154 break; 155 case ALG_AES_CMAC: 156 rpn = key->u.aes_cmac.rx_pn; 157 p += scnprintf(p, sizeof(buf)+buf-p, 158 "%02x%02x%02x%02x%02x%02x\n", 159 rpn[0], rpn[1], rpn[2], 160 rpn[3], rpn[4], rpn[5]); 161 len = p - buf; 162 break; 163 default: 164 return 0; 165 } 166 return simple_read_from_buffer(userbuf, count, ppos, buf, len); 167 } 168 KEY_OPS(rx_spec); 169 170 static ssize_t key_replays_read(struct file *file, char __user *userbuf, 171 size_t count, loff_t *ppos) 172 { 173 struct ieee80211_key *key = file->private_data; 174 char buf[20]; 175 int len; 176 177 switch (key->conf.alg) { 178 case ALG_CCMP: 179 len = scnprintf(buf, sizeof(buf), "%u\n", key->u.ccmp.replays); 180 break; 181 case ALG_AES_CMAC: 182 len = scnprintf(buf, sizeof(buf), "%u\n", 183 key->u.aes_cmac.replays); 184 break; 185 default: 186 return 0; 187 } 188 return simple_read_from_buffer(userbuf, count, ppos, buf, len); 189 } 190 KEY_OPS(replays); 191 192 static ssize_t key_icverrors_read(struct file *file, char __user *userbuf, 193 size_t count, loff_t *ppos) 194 { 195 struct ieee80211_key *key = file->private_data; 196 char buf[20]; 197 int len; 198 199 switch (key->conf.alg) { 200 case ALG_AES_CMAC: 201 len = scnprintf(buf, sizeof(buf), "%u\n", 202 key->u.aes_cmac.icverrors); 203 break; 204 default: 205 return 0; 206 } 207 return simple_read_from_buffer(userbuf, count, ppos, buf, len); 208 } 209 KEY_OPS(icverrors); 210 211 static ssize_t key_key_read(struct file *file, char __user *userbuf, 212 size_t count, loff_t *ppos) 213 { 214 struct ieee80211_key *key = file->private_data; 215 int i, res, bufsize = 2 * key->conf.keylen + 2; 216 char *buf = kmalloc(bufsize, GFP_KERNEL); 217 char *p = buf; 218 219 for (i = 0; i < key->conf.keylen; i++) 220 p += scnprintf(p, bufsize + buf - p, "%02x", key->conf.key[i]); 221 p += scnprintf(p, bufsize+buf-p, "\n"); 222 res = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); 223 kfree(buf); 224 return res; 225 } 226 KEY_OPS(key); 227 228 #define DEBUGFS_ADD(name) \ 229 debugfs_create_file(#name, 0400, key->debugfs.dir, \ 230 key, &key_##name##_ops); 231 232 void ieee80211_debugfs_key_add(struct ieee80211_key *key) 233 { 234 static int keycount; 235 char buf[50]; 236 struct sta_info *sta; 237 238 if (!key->local->debugfs.keys) 239 return; 240 241 sprintf(buf, "%d", keycount); 242 key->debugfs.cnt = keycount; 243 keycount++; 244 key->debugfs.dir = debugfs_create_dir(buf, 245 key->local->debugfs.keys); 246 247 if (!key->debugfs.dir) 248 return; 249 250 rcu_read_lock(); 251 sta = rcu_dereference(key->sta); 252 if (sta) 253 sprintf(buf, "../../stations/%pM", sta->sta.addr); 254 rcu_read_unlock(); 255 256 /* using sta as a boolean is fine outside RCU lock */ 257 if (sta) 258 key->debugfs.stalink = 259 debugfs_create_symlink("station", key->debugfs.dir, buf); 260 261 DEBUGFS_ADD(keylen); 262 DEBUGFS_ADD(flags); 263 DEBUGFS_ADD(keyidx); 264 DEBUGFS_ADD(hw_key_idx); 265 DEBUGFS_ADD(tx_rx_count); 266 DEBUGFS_ADD(algorithm); 267 DEBUGFS_ADD(tx_spec); 268 DEBUGFS_ADD(rx_spec); 269 DEBUGFS_ADD(replays); 270 DEBUGFS_ADD(icverrors); 271 DEBUGFS_ADD(key); 272 DEBUGFS_ADD(ifindex); 273 }; 274 275 void ieee80211_debugfs_key_remove(struct ieee80211_key *key) 276 { 277 if (!key) 278 return; 279 280 debugfs_remove_recursive(key->debugfs.dir); 281 key->debugfs.dir = NULL; 282 } 283 void ieee80211_debugfs_key_add_default(struct ieee80211_sub_if_data *sdata) 284 { 285 char buf[50]; 286 struct ieee80211_key *key; 287 288 if (!sdata->debugfs.dir) 289 return; 290 291 /* this is running under the key lock */ 292 293 key = sdata->default_key; 294 if (key) { 295 sprintf(buf, "../keys/%d", key->debugfs.cnt); 296 sdata->debugfs.default_key = 297 debugfs_create_symlink("default_key", 298 sdata->debugfs.dir, buf); 299 } else 300 ieee80211_debugfs_key_remove_default(sdata); 301 } 302 303 void ieee80211_debugfs_key_remove_default(struct ieee80211_sub_if_data *sdata) 304 { 305 if (!sdata) 306 return; 307 308 debugfs_remove(sdata->debugfs.default_key); 309 sdata->debugfs.default_key = NULL; 310 } 311 312 void ieee80211_debugfs_key_add_mgmt_default(struct ieee80211_sub_if_data *sdata) 313 { 314 char buf[50]; 315 struct ieee80211_key *key; 316 317 if (!sdata->debugfs.dir) 318 return; 319 320 /* this is running under the key lock */ 321 322 key = sdata->default_mgmt_key; 323 if (key) { 324 sprintf(buf, "../keys/%d", key->debugfs.cnt); 325 sdata->debugfs.default_mgmt_key = 326 debugfs_create_symlink("default_mgmt_key", 327 sdata->debugfs.dir, buf); 328 } else 329 ieee80211_debugfs_key_remove_mgmt_default(sdata); 330 } 331 332 void ieee80211_debugfs_key_remove_mgmt_default(struct ieee80211_sub_if_data *sdata) 333 { 334 if (!sdata) 335 return; 336 337 debugfs_remove(sdata->debugfs.default_mgmt_key); 338 sdata->debugfs.default_mgmt_key = NULL; 339 } 340 341 void ieee80211_debugfs_key_sta_del(struct ieee80211_key *key, 342 struct sta_info *sta) 343 { 344 debugfs_remove(key->debugfs.stalink); 345 key->debugfs.stalink = NULL; 346 } 347