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 .llseek = generic_file_llseek, \ 36 } 37 38 #define KEY_FILE(name, format) \ 39 KEY_READ_##format(name) \ 40 KEY_OPS(name) 41 42 #define KEY_CONF_READ(name, buflen, format_string) \ 43 KEY_READ(conf_##name, conf.name, buflen, format_string) 44 #define KEY_CONF_READ_D(name) KEY_CONF_READ(name, 20, "%d\n") 45 46 #define KEY_CONF_OPS(name) \ 47 static const struct file_operations key_ ##name## _ops = { \ 48 .read = key_conf_##name##_read, \ 49 .open = mac80211_open_file_generic, \ 50 .llseek = generic_file_llseek, \ 51 } 52 53 #define KEY_CONF_FILE(name, format) \ 54 KEY_CONF_READ_##format(name) \ 55 KEY_CONF_OPS(name) 56 57 KEY_CONF_FILE(keylen, D); 58 KEY_CONF_FILE(keyidx, D); 59 KEY_CONF_FILE(hw_key_idx, D); 60 KEY_FILE(flags, X); 61 KEY_FILE(tx_rx_count, D); 62 KEY_READ(ifindex, sdata->name, IFNAMSIZ + 2, "%s\n"); 63 KEY_OPS(ifindex); 64 65 static ssize_t key_algorithm_read(struct file *file, 66 char __user *userbuf, 67 size_t count, loff_t *ppos) 68 { 69 char buf[15]; 70 struct ieee80211_key *key = file->private_data; 71 u32 c = key->conf.cipher; 72 73 sprintf(buf, "%.2x-%.2x-%.2x:%d\n", 74 c >> 24, (c >> 16) & 0xff, (c >> 8) & 0xff, c & 0xff); 75 return simple_read_from_buffer(userbuf, count, ppos, buf, strlen(buf)); 76 } 77 KEY_OPS(algorithm); 78 79 static ssize_t key_tx_spec_read(struct file *file, char __user *userbuf, 80 size_t count, loff_t *ppos) 81 { 82 const u8 *tpn; 83 char buf[20]; 84 int len; 85 struct ieee80211_key *key = file->private_data; 86 87 switch (key->conf.cipher) { 88 case WLAN_CIPHER_SUITE_WEP40: 89 case WLAN_CIPHER_SUITE_WEP104: 90 len = scnprintf(buf, sizeof(buf), "\n"); 91 break; 92 case WLAN_CIPHER_SUITE_TKIP: 93 len = scnprintf(buf, sizeof(buf), "%08x %04x\n", 94 key->u.tkip.tx.iv32, 95 key->u.tkip.tx.iv16); 96 break; 97 case WLAN_CIPHER_SUITE_CCMP: 98 tpn = key->u.ccmp.tx_pn; 99 len = scnprintf(buf, sizeof(buf), "%02x%02x%02x%02x%02x%02x\n", 100 tpn[0], tpn[1], tpn[2], tpn[3], tpn[4], tpn[5]); 101 break; 102 case WLAN_CIPHER_SUITE_AES_CMAC: 103 tpn = key->u.aes_cmac.tx_pn; 104 len = scnprintf(buf, sizeof(buf), "%02x%02x%02x%02x%02x%02x\n", 105 tpn[0], tpn[1], tpn[2], tpn[3], tpn[4], 106 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.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 } 159 KEY_OPS(rx_spec); 160 161 static 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 } 181 KEY_OPS(replays); 182 183 static 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 } 200 KEY_OPS(icverrors); 201 202 static 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, res, bufsize = 2 * key->conf.keylen + 2; 207 char *buf = kmalloc(bufsize, GFP_KERNEL); 208 char *p = buf; 209 210 for (i = 0; i < key->conf.keylen; i++) 211 p += scnprintf(p, bufsize + buf - p, "%02x", key->conf.key[i]); 212 p += scnprintf(p, bufsize+buf-p, "\n"); 213 res = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); 214 kfree(buf); 215 return res; 216 } 217 KEY_OPS(key); 218 219 #define DEBUGFS_ADD(name) \ 220 debugfs_create_file(#name, 0400, key->debugfs.dir, \ 221 key, &key_##name##_ops); 222 223 void ieee80211_debugfs_key_add(struct ieee80211_key *key) 224 { 225 static int keycount; 226 char buf[50]; 227 struct sta_info *sta; 228 229 if (!key->local->debugfs.keys) 230 return; 231 232 sprintf(buf, "%d", keycount); 233 key->debugfs.cnt = keycount; 234 keycount++; 235 key->debugfs.dir = debugfs_create_dir(buf, 236 key->local->debugfs.keys); 237 238 if (!key->debugfs.dir) 239 return; 240 241 rcu_read_lock(); 242 sta = rcu_dereference(key->sta); 243 if (sta) 244 sprintf(buf, "../../stations/%pM", sta->sta.addr); 245 rcu_read_unlock(); 246 247 /* using sta as a boolean is fine outside RCU lock */ 248 if (sta) 249 key->debugfs.stalink = 250 debugfs_create_symlink("station", key->debugfs.dir, buf); 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 }; 265 266 void 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 void ieee80211_debugfs_key_add_default(struct ieee80211_sub_if_data *sdata) 275 { 276 char buf[50]; 277 struct ieee80211_key *key; 278 279 if (!sdata->debugfs.dir) 280 return; 281 282 /* this is running under the key lock */ 283 284 key = sdata->default_key; 285 if (key) { 286 sprintf(buf, "../keys/%d", key->debugfs.cnt); 287 sdata->debugfs.default_key = 288 debugfs_create_symlink("default_key", 289 sdata->debugfs.dir, buf); 290 } else 291 ieee80211_debugfs_key_remove_default(sdata); 292 } 293 294 void ieee80211_debugfs_key_remove_default(struct ieee80211_sub_if_data *sdata) 295 { 296 if (!sdata) 297 return; 298 299 debugfs_remove(sdata->debugfs.default_key); 300 sdata->debugfs.default_key = NULL; 301 } 302 303 void ieee80211_debugfs_key_add_mgmt_default(struct ieee80211_sub_if_data *sdata) 304 { 305 char buf[50]; 306 struct ieee80211_key *key; 307 308 if (!sdata->debugfs.dir) 309 return; 310 311 /* this is running under the key lock */ 312 313 key = sdata->default_mgmt_key; 314 if (key) { 315 sprintf(buf, "../keys/%d", key->debugfs.cnt); 316 sdata->debugfs.default_mgmt_key = 317 debugfs_create_symlink("default_mgmt_key", 318 sdata->debugfs.dir, buf); 319 } else 320 ieee80211_debugfs_key_remove_mgmt_default(sdata); 321 } 322 323 void ieee80211_debugfs_key_remove_mgmt_default(struct ieee80211_sub_if_data *sdata) 324 { 325 if (!sdata) 326 return; 327 328 debugfs_remove(sdata->debugfs.default_mgmt_key); 329 sdata->debugfs.default_mgmt_key = NULL; 330 } 331 332 void ieee80211_debugfs_key_sta_del(struct ieee80211_key *key, 333 struct sta_info *sta) 334 { 335 debugfs_remove(key->debugfs.stalink); 336 key->debugfs.stalink = NULL; 337 } 338