Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 1 | /* |
| 2 | * cfg80211 scan result handling |
| 3 | * |
| 4 | * Copyright 2008 Johannes Berg <johannes@sipsolutions.net> |
| 5 | */ |
| 6 | #include <linux/kernel.h> |
| 7 | #include <linux/module.h> |
| 8 | #include <linux/netdevice.h> |
| 9 | #include <linux/wireless.h> |
| 10 | #include <linux/nl80211.h> |
| 11 | #include <linux/etherdevice.h> |
| 12 | #include <net/arp.h> |
| 13 | #include <net/cfg80211.h> |
| 14 | #include <net/iw_handler.h> |
| 15 | #include "core.h" |
| 16 | #include "nl80211.h" |
Johannes Berg | a9a1162 | 2009-07-27 12:01:53 +0200 | [diff] [blame] | 17 | #include "wext-compat.h" |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 18 | |
Helmut Schaa | 09f97e0 | 2009-07-23 12:14:29 +0200 | [diff] [blame] | 19 | #define IEEE80211_SCAN_RESULT_EXPIRE (15 * HZ) |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 20 | |
Johannes Berg | 01a0ac4 | 2009-08-20 21:36:16 +0200 | [diff] [blame] | 21 | void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, bool leak) |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 22 | { |
Johannes Berg | 667503d | 2009-07-07 03:56:11 +0200 | [diff] [blame] | 23 | struct cfg80211_scan_request *request; |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 24 | struct net_device *dev; |
Johannes Berg | 3d23e34 | 2009-09-29 23:27:28 +0200 | [diff] [blame] | 25 | #ifdef CONFIG_CFG80211_WEXT |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 26 | union iwreq_data wrqu; |
| 27 | #endif |
| 28 | |
Johannes Berg | 01a0ac4 | 2009-08-20 21:36:16 +0200 | [diff] [blame] | 29 | ASSERT_RDEV_LOCK(rdev); |
| 30 | |
Johannes Berg | 667503d | 2009-07-07 03:56:11 +0200 | [diff] [blame] | 31 | request = rdev->scan_req; |
| 32 | |
Johannes Berg | 01a0ac4 | 2009-08-20 21:36:16 +0200 | [diff] [blame] | 33 | if (!request) |
| 34 | return; |
| 35 | |
Johannes Berg | 463d018 | 2009-07-14 00:33:35 +0200 | [diff] [blame] | 36 | dev = request->dev; |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 37 | |
Johannes Berg | 6829c87 | 2009-07-02 09:13:27 +0200 | [diff] [blame] | 38 | /* |
| 39 | * This must be before sending the other events! |
| 40 | * Otherwise, wpa_supplicant gets completely confused with |
| 41 | * wext events. |
| 42 | */ |
| 43 | cfg80211_sme_scan_done(dev); |
| 44 | |
Johannes Berg | 667503d | 2009-07-07 03:56:11 +0200 | [diff] [blame] | 45 | if (request->aborted) |
Johannes Berg | 36e6fea | 2009-08-12 22:21:21 +0200 | [diff] [blame] | 46 | nl80211_send_scan_aborted(rdev, dev); |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 47 | else |
Johannes Berg | 36e6fea | 2009-08-12 22:21:21 +0200 | [diff] [blame] | 48 | nl80211_send_scan_done(rdev, dev); |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 49 | |
Johannes Berg | 3d23e34 | 2009-09-29 23:27:28 +0200 | [diff] [blame] | 50 | #ifdef CONFIG_CFG80211_WEXT |
Johannes Berg | 667503d | 2009-07-07 03:56:11 +0200 | [diff] [blame] | 51 | if (!request->aborted) { |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 52 | memset(&wrqu, 0, sizeof(wrqu)); |
| 53 | |
| 54 | wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL); |
| 55 | } |
| 56 | #endif |
| 57 | |
| 58 | dev_put(dev); |
| 59 | |
Johannes Berg | 36e6fea | 2009-08-12 22:21:21 +0200 | [diff] [blame] | 60 | rdev->scan_req = NULL; |
Johannes Berg | 01a0ac4 | 2009-08-20 21:36:16 +0200 | [diff] [blame] | 61 | |
| 62 | /* |
| 63 | * OK. If this is invoked with "leak" then we can't |
| 64 | * free this ... but we've cleaned it up anyway. The |
| 65 | * driver failed to call the scan_done callback, so |
| 66 | * all bets are off, it might still be trying to use |
| 67 | * the scan request or not ... if it accesses the dev |
| 68 | * in there (it shouldn't anyway) then it may crash. |
| 69 | */ |
| 70 | if (!leak) |
| 71 | kfree(request); |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 72 | } |
Johannes Berg | 667503d | 2009-07-07 03:56:11 +0200 | [diff] [blame] | 73 | |
Johannes Berg | 36e6fea | 2009-08-12 22:21:21 +0200 | [diff] [blame] | 74 | void __cfg80211_scan_done(struct work_struct *wk) |
| 75 | { |
| 76 | struct cfg80211_registered_device *rdev; |
| 77 | |
| 78 | rdev = container_of(wk, struct cfg80211_registered_device, |
| 79 | scan_done_wk); |
| 80 | |
| 81 | cfg80211_lock_rdev(rdev); |
Johannes Berg | 01a0ac4 | 2009-08-20 21:36:16 +0200 | [diff] [blame] | 82 | ___cfg80211_scan_done(rdev, false); |
Johannes Berg | 36e6fea | 2009-08-12 22:21:21 +0200 | [diff] [blame] | 83 | cfg80211_unlock_rdev(rdev); |
| 84 | } |
| 85 | |
Johannes Berg | 667503d | 2009-07-07 03:56:11 +0200 | [diff] [blame] | 86 | void cfg80211_scan_done(struct cfg80211_scan_request *request, bool aborted) |
| 87 | { |
Johannes Berg | 667503d | 2009-07-07 03:56:11 +0200 | [diff] [blame] | 88 | WARN_ON(request != wiphy_to_dev(request->wiphy)->scan_req); |
| 89 | |
| 90 | request->aborted = aborted; |
Alban Browaeys | e60d744 | 2009-11-25 15:13:00 +0100 | [diff] [blame] | 91 | queue_work(cfg80211_wq, &wiphy_to_dev(request->wiphy)->scan_done_wk); |
Johannes Berg | 667503d | 2009-07-07 03:56:11 +0200 | [diff] [blame] | 92 | } |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 93 | EXPORT_SYMBOL(cfg80211_scan_done); |
| 94 | |
| 95 | static void bss_release(struct kref *ref) |
| 96 | { |
| 97 | struct cfg80211_internal_bss *bss; |
| 98 | |
| 99 | bss = container_of(ref, struct cfg80211_internal_bss, ref); |
Johannes Berg | 78c1c7e | 2009-02-10 21:25:57 +0100 | [diff] [blame] | 100 | if (bss->pub.free_priv) |
| 101 | bss->pub.free_priv(&bss->pub); |
Johannes Berg | cd1658f | 2009-04-16 15:00:58 +0200 | [diff] [blame] | 102 | |
Jouni Malinen | 34a6edd | 2010-01-06 16:19:24 +0200 | [diff] [blame^] | 103 | if (bss->beacon_ies_allocated) |
| 104 | kfree(bss->pub.beacon_ies); |
| 105 | if (bss->proberesp_ies_allocated) |
| 106 | kfree(bss->pub.proberesp_ies); |
Johannes Berg | cd1658f | 2009-04-16 15:00:58 +0200 | [diff] [blame] | 107 | |
Johannes Berg | 19957bb | 2009-07-02 17:20:43 +0200 | [diff] [blame] | 108 | BUG_ON(atomic_read(&bss->hold)); |
| 109 | |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 110 | kfree(bss); |
| 111 | } |
| 112 | |
| 113 | /* must hold dev->bss_lock! */ |
Dan Williams | cb3a8ee | 2009-02-11 17:14:43 -0500 | [diff] [blame] | 114 | void cfg80211_bss_age(struct cfg80211_registered_device *dev, |
| 115 | unsigned long age_secs) |
| 116 | { |
| 117 | struct cfg80211_internal_bss *bss; |
| 118 | unsigned long age_jiffies = msecs_to_jiffies(age_secs * MSEC_PER_SEC); |
| 119 | |
| 120 | list_for_each_entry(bss, &dev->bss_list, list) { |
| 121 | bss->ts -= age_jiffies; |
| 122 | } |
| 123 | } |
| 124 | |
| 125 | /* must hold dev->bss_lock! */ |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 126 | void cfg80211_bss_expire(struct cfg80211_registered_device *dev) |
| 127 | { |
| 128 | struct cfg80211_internal_bss *bss, *tmp; |
| 129 | bool expired = false; |
| 130 | |
| 131 | list_for_each_entry_safe(bss, tmp, &dev->bss_list, list) { |
Johannes Berg | 19957bb | 2009-07-02 17:20:43 +0200 | [diff] [blame] | 132 | if (atomic_read(&bss->hold)) |
| 133 | continue; |
| 134 | if (!time_after(jiffies, bss->ts + IEEE80211_SCAN_RESULT_EXPIRE)) |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 135 | continue; |
| 136 | list_del(&bss->list); |
| 137 | rb_erase(&bss->rbn, &dev->bss_tree); |
| 138 | kref_put(&bss->ref, bss_release); |
| 139 | expired = true; |
| 140 | } |
| 141 | |
| 142 | if (expired) |
| 143 | dev->bss_generation++; |
| 144 | } |
| 145 | |
Bob Copeland | fcc6cb0 | 2009-09-01 18:12:11 -0400 | [diff] [blame] | 146 | static u8 *find_ie(u8 num, u8 *ies, int len) |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 147 | { |
| 148 | while (len > 2 && ies[0] != num) { |
| 149 | len -= ies[1] + 2; |
| 150 | ies += ies[1] + 2; |
| 151 | } |
| 152 | if (len < 2) |
| 153 | return NULL; |
| 154 | if (len < 2 + ies[1]) |
| 155 | return NULL; |
| 156 | return ies; |
| 157 | } |
| 158 | |
| 159 | static int cmp_ies(u8 num, u8 *ies1, size_t len1, u8 *ies2, size_t len2) |
| 160 | { |
| 161 | const u8 *ie1 = find_ie(num, ies1, len1); |
| 162 | const u8 *ie2 = find_ie(num, ies2, len2); |
| 163 | int r; |
| 164 | |
| 165 | if (!ie1 && !ie2) |
| 166 | return 0; |
Johannes Berg | cd3468b | 2009-07-29 22:07:44 +0200 | [diff] [blame] | 167 | if (!ie1 || !ie2) |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 168 | return -1; |
| 169 | |
| 170 | r = memcmp(ie1 + 2, ie2 + 2, min(ie1[1], ie2[1])); |
| 171 | if (r == 0 && ie1[1] != ie2[1]) |
| 172 | return ie2[1] - ie1[1]; |
| 173 | return r; |
| 174 | } |
| 175 | |
| 176 | static bool is_bss(struct cfg80211_bss *a, |
| 177 | const u8 *bssid, |
| 178 | const u8 *ssid, size_t ssid_len) |
| 179 | { |
| 180 | const u8 *ssidie; |
| 181 | |
Johannes Berg | 79420f0 | 2009-02-10 21:25:59 +0100 | [diff] [blame] | 182 | if (bssid && compare_ether_addr(a->bssid, bssid)) |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 183 | return false; |
| 184 | |
Johannes Berg | 79420f0 | 2009-02-10 21:25:59 +0100 | [diff] [blame] | 185 | if (!ssid) |
| 186 | return true; |
| 187 | |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 188 | ssidie = find_ie(WLAN_EID_SSID, |
| 189 | a->information_elements, |
| 190 | a->len_information_elements); |
| 191 | if (!ssidie) |
| 192 | return false; |
| 193 | if (ssidie[1] != ssid_len) |
| 194 | return false; |
| 195 | return memcmp(ssidie + 2, ssid, ssid_len) == 0; |
| 196 | } |
| 197 | |
| 198 | static bool is_mesh(struct cfg80211_bss *a, |
| 199 | const u8 *meshid, size_t meshidlen, |
| 200 | const u8 *meshcfg) |
| 201 | { |
| 202 | const u8 *ie; |
| 203 | |
| 204 | if (!is_zero_ether_addr(a->bssid)) |
| 205 | return false; |
| 206 | |
| 207 | ie = find_ie(WLAN_EID_MESH_ID, |
| 208 | a->information_elements, |
| 209 | a->len_information_elements); |
| 210 | if (!ie) |
| 211 | return false; |
| 212 | if (ie[1] != meshidlen) |
| 213 | return false; |
| 214 | if (memcmp(ie + 2, meshid, meshidlen)) |
| 215 | return false; |
| 216 | |
| 217 | ie = find_ie(WLAN_EID_MESH_CONFIG, |
| 218 | a->information_elements, |
| 219 | a->len_information_elements); |
Johannes Berg | cd3468b | 2009-07-29 22:07:44 +0200 | [diff] [blame] | 220 | if (!ie) |
| 221 | return false; |
Rui Paulo | 136cfa2 | 2009-11-18 18:40:00 +0000 | [diff] [blame] | 222 | if (ie[1] != sizeof(struct ieee80211_meshconf_ie)) |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 223 | return false; |
| 224 | |
| 225 | /* |
| 226 | * Ignore mesh capability (last two bytes of the IE) when |
| 227 | * comparing since that may differ between stations taking |
| 228 | * part in the same mesh. |
| 229 | */ |
Rui Paulo | 136cfa2 | 2009-11-18 18:40:00 +0000 | [diff] [blame] | 230 | return memcmp(ie + 2, meshcfg, |
| 231 | sizeof(struct ieee80211_meshconf_ie) - 2) == 0; |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 232 | } |
| 233 | |
| 234 | static int cmp_bss(struct cfg80211_bss *a, |
| 235 | struct cfg80211_bss *b) |
| 236 | { |
| 237 | int r; |
| 238 | |
| 239 | if (a->channel != b->channel) |
| 240 | return b->channel->center_freq - a->channel->center_freq; |
| 241 | |
| 242 | r = memcmp(a->bssid, b->bssid, ETH_ALEN); |
| 243 | if (r) |
| 244 | return r; |
| 245 | |
| 246 | if (is_zero_ether_addr(a->bssid)) { |
| 247 | r = cmp_ies(WLAN_EID_MESH_ID, |
| 248 | a->information_elements, |
| 249 | a->len_information_elements, |
| 250 | b->information_elements, |
| 251 | b->len_information_elements); |
| 252 | if (r) |
| 253 | return r; |
| 254 | return cmp_ies(WLAN_EID_MESH_CONFIG, |
| 255 | a->information_elements, |
| 256 | a->len_information_elements, |
| 257 | b->information_elements, |
| 258 | b->len_information_elements); |
| 259 | } |
| 260 | |
| 261 | return cmp_ies(WLAN_EID_SSID, |
| 262 | a->information_elements, |
| 263 | a->len_information_elements, |
| 264 | b->information_elements, |
| 265 | b->len_information_elements); |
| 266 | } |
| 267 | |
| 268 | struct cfg80211_bss *cfg80211_get_bss(struct wiphy *wiphy, |
| 269 | struct ieee80211_channel *channel, |
| 270 | const u8 *bssid, |
Johannes Berg | 79420f0 | 2009-02-10 21:25:59 +0100 | [diff] [blame] | 271 | const u8 *ssid, size_t ssid_len, |
| 272 | u16 capa_mask, u16 capa_val) |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 273 | { |
| 274 | struct cfg80211_registered_device *dev = wiphy_to_dev(wiphy); |
| 275 | struct cfg80211_internal_bss *bss, *res = NULL; |
| 276 | |
| 277 | spin_lock_bh(&dev->bss_lock); |
| 278 | |
| 279 | list_for_each_entry(bss, &dev->bss_list, list) { |
Johannes Berg | 79420f0 | 2009-02-10 21:25:59 +0100 | [diff] [blame] | 280 | if ((bss->pub.capability & capa_mask) != capa_val) |
| 281 | continue; |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 282 | if (channel && bss->pub.channel != channel) |
| 283 | continue; |
| 284 | if (is_bss(&bss->pub, bssid, ssid, ssid_len)) { |
| 285 | res = bss; |
| 286 | kref_get(&res->ref); |
| 287 | break; |
| 288 | } |
| 289 | } |
| 290 | |
| 291 | spin_unlock_bh(&dev->bss_lock); |
| 292 | if (!res) |
| 293 | return NULL; |
| 294 | return &res->pub; |
| 295 | } |
| 296 | EXPORT_SYMBOL(cfg80211_get_bss); |
| 297 | |
| 298 | struct cfg80211_bss *cfg80211_get_mesh(struct wiphy *wiphy, |
| 299 | struct ieee80211_channel *channel, |
| 300 | const u8 *meshid, size_t meshidlen, |
| 301 | const u8 *meshcfg) |
| 302 | { |
| 303 | struct cfg80211_registered_device *dev = wiphy_to_dev(wiphy); |
| 304 | struct cfg80211_internal_bss *bss, *res = NULL; |
| 305 | |
| 306 | spin_lock_bh(&dev->bss_lock); |
| 307 | |
| 308 | list_for_each_entry(bss, &dev->bss_list, list) { |
| 309 | if (channel && bss->pub.channel != channel) |
| 310 | continue; |
| 311 | if (is_mesh(&bss->pub, meshid, meshidlen, meshcfg)) { |
| 312 | res = bss; |
| 313 | kref_get(&res->ref); |
| 314 | break; |
| 315 | } |
| 316 | } |
| 317 | |
| 318 | spin_unlock_bh(&dev->bss_lock); |
| 319 | if (!res) |
| 320 | return NULL; |
| 321 | return &res->pub; |
| 322 | } |
| 323 | EXPORT_SYMBOL(cfg80211_get_mesh); |
| 324 | |
| 325 | |
| 326 | static void rb_insert_bss(struct cfg80211_registered_device *dev, |
| 327 | struct cfg80211_internal_bss *bss) |
| 328 | { |
| 329 | struct rb_node **p = &dev->bss_tree.rb_node; |
| 330 | struct rb_node *parent = NULL; |
| 331 | struct cfg80211_internal_bss *tbss; |
| 332 | int cmp; |
| 333 | |
| 334 | while (*p) { |
| 335 | parent = *p; |
| 336 | tbss = rb_entry(parent, struct cfg80211_internal_bss, rbn); |
| 337 | |
| 338 | cmp = cmp_bss(&bss->pub, &tbss->pub); |
| 339 | |
| 340 | if (WARN_ON(!cmp)) { |
| 341 | /* will sort of leak this BSS */ |
| 342 | return; |
| 343 | } |
| 344 | |
| 345 | if (cmp < 0) |
| 346 | p = &(*p)->rb_left; |
| 347 | else |
| 348 | p = &(*p)->rb_right; |
| 349 | } |
| 350 | |
| 351 | rb_link_node(&bss->rbn, parent, p); |
| 352 | rb_insert_color(&bss->rbn, &dev->bss_tree); |
| 353 | } |
| 354 | |
| 355 | static struct cfg80211_internal_bss * |
| 356 | rb_find_bss(struct cfg80211_registered_device *dev, |
| 357 | struct cfg80211_internal_bss *res) |
| 358 | { |
| 359 | struct rb_node *n = dev->bss_tree.rb_node; |
| 360 | struct cfg80211_internal_bss *bss; |
| 361 | int r; |
| 362 | |
| 363 | while (n) { |
| 364 | bss = rb_entry(n, struct cfg80211_internal_bss, rbn); |
| 365 | r = cmp_bss(&res->pub, &bss->pub); |
| 366 | |
| 367 | if (r == 0) |
| 368 | return bss; |
| 369 | else if (r < 0) |
| 370 | n = n->rb_left; |
| 371 | else |
| 372 | n = n->rb_right; |
| 373 | } |
| 374 | |
| 375 | return NULL; |
| 376 | } |
| 377 | |
| 378 | static struct cfg80211_internal_bss * |
| 379 | cfg80211_bss_update(struct cfg80211_registered_device *dev, |
Jouni Malinen | 34a6edd | 2010-01-06 16:19:24 +0200 | [diff] [blame^] | 380 | struct cfg80211_internal_bss *res) |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 381 | { |
| 382 | struct cfg80211_internal_bss *found = NULL; |
| 383 | const u8 *meshid, *meshcfg; |
| 384 | |
| 385 | /* |
| 386 | * The reference to "res" is donated to this function. |
| 387 | */ |
| 388 | |
| 389 | if (WARN_ON(!res->pub.channel)) { |
| 390 | kref_put(&res->ref, bss_release); |
| 391 | return NULL; |
| 392 | } |
| 393 | |
| 394 | res->ts = jiffies; |
| 395 | |
| 396 | if (is_zero_ether_addr(res->pub.bssid)) { |
| 397 | /* must be mesh, verify */ |
| 398 | meshid = find_ie(WLAN_EID_MESH_ID, res->pub.information_elements, |
| 399 | res->pub.len_information_elements); |
| 400 | meshcfg = find_ie(WLAN_EID_MESH_CONFIG, |
| 401 | res->pub.information_elements, |
| 402 | res->pub.len_information_elements); |
| 403 | if (!meshid || !meshcfg || |
Rui Paulo | 136cfa2 | 2009-11-18 18:40:00 +0000 | [diff] [blame] | 404 | meshcfg[1] != sizeof(struct ieee80211_meshconf_ie)) { |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 405 | /* bogus mesh */ |
| 406 | kref_put(&res->ref, bss_release); |
| 407 | return NULL; |
| 408 | } |
| 409 | } |
| 410 | |
| 411 | spin_lock_bh(&dev->bss_lock); |
| 412 | |
| 413 | found = rb_find_bss(dev, res); |
| 414 | |
Johannes Berg | cd1658f | 2009-04-16 15:00:58 +0200 | [diff] [blame] | 415 | if (found) { |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 416 | found->pub.beacon_interval = res->pub.beacon_interval; |
| 417 | found->pub.tsf = res->pub.tsf; |
| 418 | found->pub.signal = res->pub.signal; |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 419 | found->pub.capability = res->pub.capability; |
| 420 | found->ts = res->ts; |
Johannes Berg | cd1658f | 2009-04-16 15:00:58 +0200 | [diff] [blame] | 421 | |
Jouni Malinen | 34a6edd | 2010-01-06 16:19:24 +0200 | [diff] [blame^] | 422 | /* Update IEs */ |
| 423 | if (res->pub.proberesp_ies) { |
Johannes Berg | cd1658f | 2009-04-16 15:00:58 +0200 | [diff] [blame] | 424 | size_t used = dev->wiphy.bss_priv_size + sizeof(*res); |
Jouni Malinen | 34a6edd | 2010-01-06 16:19:24 +0200 | [diff] [blame^] | 425 | size_t ielen = res->pub.len_proberesp_ies; |
Johannes Berg | cd1658f | 2009-04-16 15:00:58 +0200 | [diff] [blame] | 426 | |
Jouni Malinen | 34a6edd | 2010-01-06 16:19:24 +0200 | [diff] [blame^] | 427 | if (found->pub.proberesp_ies && |
| 428 | !found->proberesp_ies_allocated && |
| 429 | ksize(found) >= used + ielen) { |
| 430 | memcpy(found->pub.proberesp_ies, |
| 431 | res->pub.proberesp_ies, ielen); |
| 432 | found->pub.len_proberesp_ies = ielen; |
Johannes Berg | cd1658f | 2009-04-16 15:00:58 +0200 | [diff] [blame] | 433 | } else { |
Jouni Malinen | 34a6edd | 2010-01-06 16:19:24 +0200 | [diff] [blame^] | 434 | u8 *ies = found->pub.proberesp_ies; |
Johannes Berg | cd1658f | 2009-04-16 15:00:58 +0200 | [diff] [blame] | 435 | |
Jouni Malinen | 34a6edd | 2010-01-06 16:19:24 +0200 | [diff] [blame^] | 436 | if (found->proberesp_ies_allocated) |
Michael Buesch | 273de92 | 2009-04-25 22:28:55 +0200 | [diff] [blame] | 437 | ies = krealloc(ies, ielen, GFP_ATOMIC); |
| 438 | else |
Johannes Berg | cd1658f | 2009-04-16 15:00:58 +0200 | [diff] [blame] | 439 | ies = kmalloc(ielen, GFP_ATOMIC); |
| 440 | |
| 441 | if (ies) { |
Jouni Malinen | 34a6edd | 2010-01-06 16:19:24 +0200 | [diff] [blame^] | 442 | memcpy(ies, res->pub.proberesp_ies, |
| 443 | ielen); |
| 444 | found->proberesp_ies_allocated = true; |
| 445 | found->pub.proberesp_ies = ies; |
| 446 | found->pub.len_proberesp_ies = ielen; |
| 447 | } |
| 448 | } |
| 449 | |
| 450 | /* Override possible earlier Beacon frame IEs */ |
| 451 | found->pub.information_elements = |
| 452 | found->pub.proberesp_ies; |
| 453 | found->pub.len_information_elements = |
| 454 | found->pub.len_proberesp_ies; |
| 455 | } |
| 456 | if (res->pub.beacon_ies) { |
| 457 | size_t used = dev->wiphy.bss_priv_size + sizeof(*res); |
| 458 | size_t ielen = res->pub.len_beacon_ies; |
| 459 | |
| 460 | if (found->pub.beacon_ies && |
| 461 | !found->beacon_ies_allocated && |
| 462 | ksize(found) >= used + ielen) { |
| 463 | memcpy(found->pub.beacon_ies, |
| 464 | res->pub.beacon_ies, ielen); |
| 465 | found->pub.len_beacon_ies = ielen; |
| 466 | } else { |
| 467 | u8 *ies = found->pub.beacon_ies; |
| 468 | |
| 469 | if (found->beacon_ies_allocated) |
| 470 | ies = krealloc(ies, ielen, GFP_ATOMIC); |
| 471 | else |
| 472 | ies = kmalloc(ielen, GFP_ATOMIC); |
| 473 | |
| 474 | if (ies) { |
| 475 | memcpy(ies, res->pub.beacon_ies, |
| 476 | ielen); |
| 477 | found->beacon_ies_allocated = true; |
| 478 | found->pub.beacon_ies = ies; |
| 479 | found->pub.len_beacon_ies = ielen; |
Johannes Berg | cd1658f | 2009-04-16 15:00:58 +0200 | [diff] [blame] | 480 | } |
| 481 | } |
| 482 | } |
| 483 | |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 484 | kref_put(&res->ref, bss_release); |
| 485 | } else { |
| 486 | /* this "consumes" the reference */ |
| 487 | list_add_tail(&res->list, &dev->bss_list); |
| 488 | rb_insert_bss(dev, res); |
| 489 | found = res; |
| 490 | } |
| 491 | |
| 492 | dev->bss_generation++; |
| 493 | spin_unlock_bh(&dev->bss_lock); |
| 494 | |
| 495 | kref_get(&found->ref); |
| 496 | return found; |
| 497 | } |
| 498 | |
Jussi Kivilinna | 06aa7af | 2009-03-26 23:40:09 +0200 | [diff] [blame] | 499 | struct cfg80211_bss* |
| 500 | cfg80211_inform_bss(struct wiphy *wiphy, |
| 501 | struct ieee80211_channel *channel, |
| 502 | const u8 *bssid, |
| 503 | u64 timestamp, u16 capability, u16 beacon_interval, |
| 504 | const u8 *ie, size_t ielen, |
| 505 | s32 signal, gfp_t gfp) |
| 506 | { |
| 507 | struct cfg80211_internal_bss *res; |
| 508 | size_t privsz; |
| 509 | |
| 510 | if (WARN_ON(!wiphy)) |
| 511 | return NULL; |
| 512 | |
| 513 | privsz = wiphy->bss_priv_size; |
| 514 | |
| 515 | if (WARN_ON(wiphy->signal_type == NL80211_BSS_SIGNAL_UNSPEC && |
| 516 | (signal < 0 || signal > 100))) |
| 517 | return NULL; |
| 518 | |
| 519 | res = kzalloc(sizeof(*res) + privsz + ielen, gfp); |
| 520 | if (!res) |
| 521 | return NULL; |
| 522 | |
| 523 | memcpy(res->pub.bssid, bssid, ETH_ALEN); |
| 524 | res->pub.channel = channel; |
| 525 | res->pub.signal = signal; |
| 526 | res->pub.tsf = timestamp; |
| 527 | res->pub.beacon_interval = beacon_interval; |
| 528 | res->pub.capability = capability; |
Jouni Malinen | 34a6edd | 2010-01-06 16:19:24 +0200 | [diff] [blame^] | 529 | /* |
| 530 | * Since we do not know here whether the IEs are from a Beacon or Probe |
| 531 | * Response frame, we need to pick one of the options and only use it |
| 532 | * with the driver that does not provide the full Beacon/Probe Response |
| 533 | * frame. Use Beacon frame pointer to avoid indicating that this should |
| 534 | * override the information_elements pointer should we have received an |
| 535 | * earlier indication of Probe Response data. |
| 536 | * |
| 537 | * The initial buffer for the IEs is allocated with the BSS entry and |
| 538 | * is located after the private area. |
| 539 | */ |
| 540 | res->pub.beacon_ies = (u8 *)res + sizeof(*res) + privsz; |
| 541 | memcpy(res->pub.beacon_ies, ie, ielen); |
| 542 | res->pub.len_beacon_ies = ielen; |
| 543 | res->pub.information_elements = res->pub.beacon_ies; |
| 544 | res->pub.len_information_elements = res->pub.len_beacon_ies; |
Jussi Kivilinna | 06aa7af | 2009-03-26 23:40:09 +0200 | [diff] [blame] | 545 | |
| 546 | kref_init(&res->ref); |
| 547 | |
Jouni Malinen | 34a6edd | 2010-01-06 16:19:24 +0200 | [diff] [blame^] | 548 | res = cfg80211_bss_update(wiphy_to_dev(wiphy), res); |
Jussi Kivilinna | 06aa7af | 2009-03-26 23:40:09 +0200 | [diff] [blame] | 549 | if (!res) |
| 550 | return NULL; |
| 551 | |
| 552 | if (res->pub.capability & WLAN_CAPABILITY_ESS) |
| 553 | regulatory_hint_found_beacon(wiphy, channel, gfp); |
| 554 | |
| 555 | /* cfg80211_bss_update gives us a referenced result */ |
| 556 | return &res->pub; |
| 557 | } |
| 558 | EXPORT_SYMBOL(cfg80211_inform_bss); |
| 559 | |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 560 | struct cfg80211_bss * |
| 561 | cfg80211_inform_bss_frame(struct wiphy *wiphy, |
| 562 | struct ieee80211_channel *channel, |
| 563 | struct ieee80211_mgmt *mgmt, size_t len, |
Johannes Berg | 77965c9 | 2009-02-18 18:45:06 +0100 | [diff] [blame] | 564 | s32 signal, gfp_t gfp) |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 565 | { |
| 566 | struct cfg80211_internal_bss *res; |
| 567 | size_t ielen = len - offsetof(struct ieee80211_mgmt, |
| 568 | u.probe_resp.variable); |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 569 | size_t privsz = wiphy->bss_priv_size; |
| 570 | |
Johannes Berg | 77965c9 | 2009-02-18 18:45:06 +0100 | [diff] [blame] | 571 | if (WARN_ON(wiphy->signal_type == NL80211_BSS_SIGNAL_UNSPEC && |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 572 | (signal < 0 || signal > 100))) |
| 573 | return NULL; |
| 574 | |
| 575 | if (WARN_ON(!mgmt || !wiphy || |
| 576 | len < offsetof(struct ieee80211_mgmt, u.probe_resp.variable))) |
| 577 | return NULL; |
| 578 | |
| 579 | res = kzalloc(sizeof(*res) + privsz + ielen, gfp); |
| 580 | if (!res) |
| 581 | return NULL; |
| 582 | |
| 583 | memcpy(res->pub.bssid, mgmt->bssid, ETH_ALEN); |
| 584 | res->pub.channel = channel; |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 585 | res->pub.signal = signal; |
| 586 | res->pub.tsf = le64_to_cpu(mgmt->u.probe_resp.timestamp); |
| 587 | res->pub.beacon_interval = le16_to_cpu(mgmt->u.probe_resp.beacon_int); |
| 588 | res->pub.capability = le16_to_cpu(mgmt->u.probe_resp.capab_info); |
Jouni Malinen | 34a6edd | 2010-01-06 16:19:24 +0200 | [diff] [blame^] | 589 | /* |
| 590 | * The initial buffer for the IEs is allocated with the BSS entry and |
| 591 | * is located after the private area. |
| 592 | */ |
| 593 | if (ieee80211_is_probe_resp(mgmt->frame_control)) { |
| 594 | res->pub.proberesp_ies = (u8 *) res + sizeof(*res) + privsz; |
| 595 | memcpy(res->pub.proberesp_ies, mgmt->u.probe_resp.variable, |
| 596 | ielen); |
| 597 | res->pub.len_proberesp_ies = ielen; |
| 598 | res->pub.information_elements = res->pub.proberesp_ies; |
| 599 | res->pub.len_information_elements = res->pub.len_proberesp_ies; |
| 600 | } else { |
| 601 | res->pub.beacon_ies = (u8 *) res + sizeof(*res) + privsz; |
| 602 | memcpy(res->pub.beacon_ies, mgmt->u.beacon.variable, ielen); |
| 603 | res->pub.len_beacon_ies = ielen; |
| 604 | res->pub.information_elements = res->pub.beacon_ies; |
| 605 | res->pub.len_information_elements = res->pub.len_beacon_ies; |
| 606 | } |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 607 | |
| 608 | kref_init(&res->ref); |
| 609 | |
Jouni Malinen | 34a6edd | 2010-01-06 16:19:24 +0200 | [diff] [blame^] | 610 | res = cfg80211_bss_update(wiphy_to_dev(wiphy), res); |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 611 | if (!res) |
| 612 | return NULL; |
| 613 | |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 614 | if (res->pub.capability & WLAN_CAPABILITY_ESS) |
| 615 | regulatory_hint_found_beacon(wiphy, channel, gfp); |
| 616 | |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 617 | /* cfg80211_bss_update gives us a referenced result */ |
| 618 | return &res->pub; |
| 619 | } |
| 620 | EXPORT_SYMBOL(cfg80211_inform_bss_frame); |
| 621 | |
| 622 | void cfg80211_put_bss(struct cfg80211_bss *pub) |
| 623 | { |
| 624 | struct cfg80211_internal_bss *bss; |
| 625 | |
| 626 | if (!pub) |
| 627 | return; |
| 628 | |
| 629 | bss = container_of(pub, struct cfg80211_internal_bss, pub); |
| 630 | kref_put(&bss->ref, bss_release); |
| 631 | } |
| 632 | EXPORT_SYMBOL(cfg80211_put_bss); |
| 633 | |
Johannes Berg | d491af1 | 2009-02-10 21:25:58 +0100 | [diff] [blame] | 634 | void cfg80211_unlink_bss(struct wiphy *wiphy, struct cfg80211_bss *pub) |
| 635 | { |
| 636 | struct cfg80211_registered_device *dev = wiphy_to_dev(wiphy); |
| 637 | struct cfg80211_internal_bss *bss; |
| 638 | |
| 639 | if (WARN_ON(!pub)) |
| 640 | return; |
| 641 | |
| 642 | bss = container_of(pub, struct cfg80211_internal_bss, pub); |
| 643 | |
| 644 | spin_lock_bh(&dev->bss_lock); |
| 645 | |
| 646 | list_del(&bss->list); |
Johannes Berg | f5ea912 | 2009-08-07 16:17:38 +0200 | [diff] [blame] | 647 | dev->bss_generation++; |
Johannes Berg | d491af1 | 2009-02-10 21:25:58 +0100 | [diff] [blame] | 648 | rb_erase(&bss->rbn, &dev->bss_tree); |
| 649 | |
| 650 | spin_unlock_bh(&dev->bss_lock); |
| 651 | |
| 652 | kref_put(&bss->ref, bss_release); |
| 653 | } |
| 654 | EXPORT_SYMBOL(cfg80211_unlink_bss); |
| 655 | |
Johannes Berg | 3d23e34 | 2009-09-29 23:27:28 +0200 | [diff] [blame] | 656 | #ifdef CONFIG_CFG80211_WEXT |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 657 | int cfg80211_wext_siwscan(struct net_device *dev, |
| 658 | struct iw_request_info *info, |
| 659 | union iwreq_data *wrqu, char *extra) |
| 660 | { |
| 661 | struct cfg80211_registered_device *rdev; |
| 662 | struct wiphy *wiphy; |
| 663 | struct iw_scan_req *wreq = NULL; |
Johannes Berg | 65486c8 | 2009-12-23 15:33:35 +0100 | [diff] [blame] | 664 | struct cfg80211_scan_request *creq = NULL; |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 665 | int i, err, n_channels = 0; |
| 666 | enum ieee80211_band band; |
| 667 | |
| 668 | if (!netif_running(dev)) |
| 669 | return -ENETDOWN; |
| 670 | |
Holger Schurig | b2e3abd | 2009-09-09 13:09:54 +0200 | [diff] [blame] | 671 | if (wrqu->data.length == sizeof(struct iw_scan_req)) |
| 672 | wreq = (struct iw_scan_req *)extra; |
| 673 | |
Johannes Berg | 463d018 | 2009-07-14 00:33:35 +0200 | [diff] [blame] | 674 | rdev = cfg80211_get_dev_from_ifindex(dev_net(dev), dev->ifindex); |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 675 | |
| 676 | if (IS_ERR(rdev)) |
| 677 | return PTR_ERR(rdev); |
| 678 | |
| 679 | if (rdev->scan_req) { |
| 680 | err = -EBUSY; |
| 681 | goto out; |
| 682 | } |
| 683 | |
| 684 | wiphy = &rdev->wiphy; |
| 685 | |
Holger Schurig | b2e3abd | 2009-09-09 13:09:54 +0200 | [diff] [blame] | 686 | /* Determine number of channels, needed to allocate creq */ |
| 687 | if (wreq && wreq->num_channels) |
| 688 | n_channels = wreq->num_channels; |
| 689 | else { |
| 690 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) |
| 691 | if (wiphy->bands[band]) |
| 692 | n_channels += wiphy->bands[band]->n_channels; |
| 693 | } |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 694 | |
| 695 | creq = kzalloc(sizeof(*creq) + sizeof(struct cfg80211_ssid) + |
| 696 | n_channels * sizeof(void *), |
| 697 | GFP_ATOMIC); |
| 698 | if (!creq) { |
| 699 | err = -ENOMEM; |
| 700 | goto out; |
| 701 | } |
| 702 | |
| 703 | creq->wiphy = wiphy; |
Johannes Berg | 463d018 | 2009-07-14 00:33:35 +0200 | [diff] [blame] | 704 | creq->dev = dev; |
Johannes Berg | 5ba6353 | 2009-08-07 17:54:07 +0200 | [diff] [blame] | 705 | /* SSIDs come after channels */ |
| 706 | creq->ssids = (void *)&creq->channels[n_channels]; |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 707 | creq->n_channels = n_channels; |
| 708 | creq->n_ssids = 1; |
| 709 | |
Holger Schurig | b2e3abd | 2009-09-09 13:09:54 +0200 | [diff] [blame] | 710 | /* translate "Scan on frequencies" request */ |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 711 | i = 0; |
| 712 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
| 713 | int j; |
Johannes Berg | 584991d | 2009-11-02 13:32:03 +0100 | [diff] [blame] | 714 | |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 715 | if (!wiphy->bands[band]) |
| 716 | continue; |
Johannes Berg | 584991d | 2009-11-02 13:32:03 +0100 | [diff] [blame] | 717 | |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 718 | for (j = 0; j < wiphy->bands[band]->n_channels; j++) { |
Johannes Berg | 584991d | 2009-11-02 13:32:03 +0100 | [diff] [blame] | 719 | /* ignore disabled channels */ |
| 720 | if (wiphy->bands[band]->channels[j].flags & |
| 721 | IEEE80211_CHAN_DISABLED) |
| 722 | continue; |
Holger Schurig | b2e3abd | 2009-09-09 13:09:54 +0200 | [diff] [blame] | 723 | |
| 724 | /* If we have a wireless request structure and the |
| 725 | * wireless request specifies frequencies, then search |
| 726 | * for the matching hardware channel. |
| 727 | */ |
| 728 | if (wreq && wreq->num_channels) { |
| 729 | int k; |
| 730 | int wiphy_freq = wiphy->bands[band]->channels[j].center_freq; |
| 731 | for (k = 0; k < wreq->num_channels; k++) { |
Holger Schurig | a4e7b73 | 2009-09-11 10:13:53 +0200 | [diff] [blame] | 732 | int wext_freq = cfg80211_wext_freq(wiphy, &wreq->channel_list[k]); |
Holger Schurig | b2e3abd | 2009-09-09 13:09:54 +0200 | [diff] [blame] | 733 | if (wext_freq == wiphy_freq) |
| 734 | goto wext_freq_found; |
| 735 | } |
| 736 | goto wext_freq_not_found; |
| 737 | } |
| 738 | |
| 739 | wext_freq_found: |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 740 | creq->channels[i] = &wiphy->bands[band]->channels[j]; |
| 741 | i++; |
Holger Schurig | b2e3abd | 2009-09-09 13:09:54 +0200 | [diff] [blame] | 742 | wext_freq_not_found: ; |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 743 | } |
| 744 | } |
Holger Schurig | 8862dc5 | 2009-09-11 10:13:55 +0200 | [diff] [blame] | 745 | /* No channels found? */ |
| 746 | if (!i) { |
| 747 | err = -EINVAL; |
| 748 | goto out; |
| 749 | } |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 750 | |
Holger Schurig | b2e3abd | 2009-09-09 13:09:54 +0200 | [diff] [blame] | 751 | /* Set real number of channels specified in creq->channels[] */ |
| 752 | creq->n_channels = i; |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 753 | |
Holger Schurig | b2e3abd | 2009-09-09 13:09:54 +0200 | [diff] [blame] | 754 | /* translate "Scan for SSID" request */ |
| 755 | if (wreq) { |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 756 | if (wrqu->data.flags & IW_SCAN_THIS_ESSID) { |
Johannes Berg | 65486c8 | 2009-12-23 15:33:35 +0100 | [diff] [blame] | 757 | if (wreq->essid_len > IEEE80211_MAX_SSID_LEN) { |
| 758 | err = -EINVAL; |
| 759 | goto out; |
| 760 | } |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 761 | memcpy(creq->ssids[0].ssid, wreq->essid, wreq->essid_len); |
| 762 | creq->ssids[0].ssid_len = wreq->essid_len; |
| 763 | } |
| 764 | if (wreq->scan_type == IW_SCAN_TYPE_PASSIVE) |
| 765 | creq->n_ssids = 0; |
| 766 | } |
| 767 | |
| 768 | rdev->scan_req = creq; |
| 769 | err = rdev->ops->scan(wiphy, dev, creq); |
| 770 | if (err) { |
| 771 | rdev->scan_req = NULL; |
Johannes Berg | 65486c8 | 2009-12-23 15:33:35 +0100 | [diff] [blame] | 772 | /* creq will be freed below */ |
Johannes Berg | 463d018 | 2009-07-14 00:33:35 +0200 | [diff] [blame] | 773 | } else { |
Johannes Berg | a538e2d | 2009-06-16 19:56:42 +0200 | [diff] [blame] | 774 | nl80211_send_scan_start(rdev, dev); |
Johannes Berg | 65486c8 | 2009-12-23 15:33:35 +0100 | [diff] [blame] | 775 | /* creq now owned by driver */ |
| 776 | creq = NULL; |
Johannes Berg | 463d018 | 2009-07-14 00:33:35 +0200 | [diff] [blame] | 777 | dev_hold(dev); |
| 778 | } |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 779 | out: |
Johannes Berg | 65486c8 | 2009-12-23 15:33:35 +0100 | [diff] [blame] | 780 | kfree(creq); |
Johannes Berg | 4d0c8ae | 2009-07-07 03:56:09 +0200 | [diff] [blame] | 781 | cfg80211_unlock_rdev(rdev); |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 782 | return err; |
| 783 | } |
Johannes Berg | ba44cb7 | 2009-04-20 18:49:39 +0200 | [diff] [blame] | 784 | EXPORT_SYMBOL_GPL(cfg80211_wext_siwscan); |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 785 | |
| 786 | static void ieee80211_scan_add_ies(struct iw_request_info *info, |
| 787 | struct cfg80211_bss *bss, |
| 788 | char **current_ev, char *end_buf) |
| 789 | { |
| 790 | u8 *pos, *end, *next; |
| 791 | struct iw_event iwe; |
| 792 | |
| 793 | if (!bss->information_elements || |
| 794 | !bss->len_information_elements) |
| 795 | return; |
| 796 | |
| 797 | /* |
| 798 | * If needed, fragment the IEs buffer (at IE boundaries) into short |
| 799 | * enough fragments to fit into IW_GENERIC_IE_MAX octet messages. |
| 800 | */ |
| 801 | pos = bss->information_elements; |
| 802 | end = pos + bss->len_information_elements; |
| 803 | |
| 804 | while (end - pos > IW_GENERIC_IE_MAX) { |
| 805 | next = pos + 2 + pos[1]; |
| 806 | while (next + 2 + next[1] - pos < IW_GENERIC_IE_MAX) |
| 807 | next = next + 2 + next[1]; |
| 808 | |
| 809 | memset(&iwe, 0, sizeof(iwe)); |
| 810 | iwe.cmd = IWEVGENIE; |
| 811 | iwe.u.data.length = next - pos; |
| 812 | *current_ev = iwe_stream_add_point(info, *current_ev, |
| 813 | end_buf, &iwe, pos); |
| 814 | |
| 815 | pos = next; |
| 816 | } |
| 817 | |
| 818 | if (end > pos) { |
| 819 | memset(&iwe, 0, sizeof(iwe)); |
| 820 | iwe.cmd = IWEVGENIE; |
| 821 | iwe.u.data.length = end - pos; |
| 822 | *current_ev = iwe_stream_add_point(info, *current_ev, |
| 823 | end_buf, &iwe, pos); |
| 824 | } |
| 825 | } |
| 826 | |
Dan Williams | cb3a8ee | 2009-02-11 17:14:43 -0500 | [diff] [blame] | 827 | static inline unsigned int elapsed_jiffies_msecs(unsigned long start) |
| 828 | { |
| 829 | unsigned long end = jiffies; |
| 830 | |
| 831 | if (end >= start) |
| 832 | return jiffies_to_msecs(end - start); |
| 833 | |
| 834 | return jiffies_to_msecs(end + (MAX_JIFFY_OFFSET - start) + 1); |
| 835 | } |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 836 | |
| 837 | static char * |
Johannes Berg | 77965c9 | 2009-02-18 18:45:06 +0100 | [diff] [blame] | 838 | ieee80211_bss(struct wiphy *wiphy, struct iw_request_info *info, |
| 839 | struct cfg80211_internal_bss *bss, char *current_ev, |
| 840 | char *end_buf) |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 841 | { |
| 842 | struct iw_event iwe; |
| 843 | u8 *buf, *cfg, *p; |
| 844 | u8 *ie = bss->pub.information_elements; |
Johannes Berg | a77b855 | 2009-02-18 18:27:22 +0100 | [diff] [blame] | 845 | int rem = bss->pub.len_information_elements, i, sig; |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 846 | bool ismesh = false; |
| 847 | |
| 848 | memset(&iwe, 0, sizeof(iwe)); |
| 849 | iwe.cmd = SIOCGIWAP; |
| 850 | iwe.u.ap_addr.sa_family = ARPHRD_ETHER; |
| 851 | memcpy(iwe.u.ap_addr.sa_data, bss->pub.bssid, ETH_ALEN); |
| 852 | current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe, |
| 853 | IW_EV_ADDR_LEN); |
| 854 | |
| 855 | memset(&iwe, 0, sizeof(iwe)); |
| 856 | iwe.cmd = SIOCGIWFREQ; |
| 857 | iwe.u.freq.m = ieee80211_frequency_to_channel(bss->pub.channel->center_freq); |
| 858 | iwe.u.freq.e = 0; |
| 859 | current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe, |
| 860 | IW_EV_FREQ_LEN); |
| 861 | |
| 862 | memset(&iwe, 0, sizeof(iwe)); |
| 863 | iwe.cmd = SIOCGIWFREQ; |
| 864 | iwe.u.freq.m = bss->pub.channel->center_freq; |
| 865 | iwe.u.freq.e = 6; |
| 866 | current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe, |
| 867 | IW_EV_FREQ_LEN); |
| 868 | |
Johannes Berg | 77965c9 | 2009-02-18 18:45:06 +0100 | [diff] [blame] | 869 | if (wiphy->signal_type != CFG80211_SIGNAL_TYPE_NONE) { |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 870 | memset(&iwe, 0, sizeof(iwe)); |
| 871 | iwe.cmd = IWEVQUAL; |
| 872 | iwe.u.qual.updated = IW_QUAL_LEVEL_UPDATED | |
| 873 | IW_QUAL_NOISE_INVALID | |
Johannes Berg | a77b855 | 2009-02-18 18:27:22 +0100 | [diff] [blame] | 874 | IW_QUAL_QUAL_UPDATED; |
Johannes Berg | 77965c9 | 2009-02-18 18:45:06 +0100 | [diff] [blame] | 875 | switch (wiphy->signal_type) { |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 876 | case CFG80211_SIGNAL_TYPE_MBM: |
Johannes Berg | a77b855 | 2009-02-18 18:27:22 +0100 | [diff] [blame] | 877 | sig = bss->pub.signal / 100; |
| 878 | iwe.u.qual.level = sig; |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 879 | iwe.u.qual.updated |= IW_QUAL_DBM; |
Johannes Berg | a77b855 | 2009-02-18 18:27:22 +0100 | [diff] [blame] | 880 | if (sig < -110) /* rather bad */ |
| 881 | sig = -110; |
| 882 | else if (sig > -40) /* perfect */ |
| 883 | sig = -40; |
| 884 | /* will give a range of 0 .. 70 */ |
| 885 | iwe.u.qual.qual = sig + 110; |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 886 | break; |
| 887 | case CFG80211_SIGNAL_TYPE_UNSPEC: |
| 888 | iwe.u.qual.level = bss->pub.signal; |
Johannes Berg | a77b855 | 2009-02-18 18:27:22 +0100 | [diff] [blame] | 889 | /* will give range 0 .. 100 */ |
| 890 | iwe.u.qual.qual = bss->pub.signal; |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 891 | break; |
| 892 | default: |
| 893 | /* not reached */ |
| 894 | break; |
| 895 | } |
| 896 | current_ev = iwe_stream_add_event(info, current_ev, end_buf, |
| 897 | &iwe, IW_EV_QUAL_LEN); |
| 898 | } |
| 899 | |
| 900 | memset(&iwe, 0, sizeof(iwe)); |
| 901 | iwe.cmd = SIOCGIWENCODE; |
| 902 | if (bss->pub.capability & WLAN_CAPABILITY_PRIVACY) |
| 903 | iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY; |
| 904 | else |
| 905 | iwe.u.data.flags = IW_ENCODE_DISABLED; |
| 906 | iwe.u.data.length = 0; |
| 907 | current_ev = iwe_stream_add_point(info, current_ev, end_buf, |
| 908 | &iwe, ""); |
| 909 | |
| 910 | while (rem >= 2) { |
| 911 | /* invalid data */ |
| 912 | if (ie[1] > rem - 2) |
| 913 | break; |
| 914 | |
| 915 | switch (ie[0]) { |
| 916 | case WLAN_EID_SSID: |
| 917 | memset(&iwe, 0, sizeof(iwe)); |
| 918 | iwe.cmd = SIOCGIWESSID; |
| 919 | iwe.u.data.length = ie[1]; |
| 920 | iwe.u.data.flags = 1; |
| 921 | current_ev = iwe_stream_add_point(info, current_ev, end_buf, |
| 922 | &iwe, ie + 2); |
| 923 | break; |
| 924 | case WLAN_EID_MESH_ID: |
| 925 | memset(&iwe, 0, sizeof(iwe)); |
| 926 | iwe.cmd = SIOCGIWESSID; |
| 927 | iwe.u.data.length = ie[1]; |
| 928 | iwe.u.data.flags = 1; |
| 929 | current_ev = iwe_stream_add_point(info, current_ev, end_buf, |
| 930 | &iwe, ie + 2); |
| 931 | break; |
| 932 | case WLAN_EID_MESH_CONFIG: |
| 933 | ismesh = true; |
Rui Paulo | 136cfa2 | 2009-11-18 18:40:00 +0000 | [diff] [blame] | 934 | if (ie[1] != sizeof(struct ieee80211_meshconf_ie)) |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 935 | break; |
| 936 | buf = kmalloc(50, GFP_ATOMIC); |
| 937 | if (!buf) |
| 938 | break; |
| 939 | cfg = ie + 2; |
| 940 | memset(&iwe, 0, sizeof(iwe)); |
| 941 | iwe.cmd = IWEVCUSTOM; |
Rui Paulo | 76aa5e7 | 2009-11-18 18:22:59 +0000 | [diff] [blame] | 942 | sprintf(buf, "Mesh Network Path Selection Protocol ID: " |
| 943 | "0x%02X", cfg[0]); |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 944 | iwe.u.data.length = strlen(buf); |
| 945 | current_ev = iwe_stream_add_point(info, current_ev, |
| 946 | end_buf, |
| 947 | &iwe, buf); |
Rui Paulo | 76aa5e7 | 2009-11-18 18:22:59 +0000 | [diff] [blame] | 948 | sprintf(buf, "Path Selection Metric ID: 0x%02X", |
| 949 | cfg[1]); |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 950 | iwe.u.data.length = strlen(buf); |
| 951 | current_ev = iwe_stream_add_point(info, current_ev, |
| 952 | end_buf, |
| 953 | &iwe, buf); |
Rui Paulo | 76aa5e7 | 2009-11-18 18:22:59 +0000 | [diff] [blame] | 954 | sprintf(buf, "Congestion Control Mode ID: 0x%02X", |
| 955 | cfg[2]); |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 956 | iwe.u.data.length = strlen(buf); |
| 957 | current_ev = iwe_stream_add_point(info, current_ev, |
| 958 | end_buf, |
| 959 | &iwe, buf); |
Rui Paulo | 76aa5e7 | 2009-11-18 18:22:59 +0000 | [diff] [blame] | 960 | sprintf(buf, "Synchronization ID: 0x%02X", cfg[3]); |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 961 | iwe.u.data.length = strlen(buf); |
| 962 | current_ev = iwe_stream_add_point(info, current_ev, |
| 963 | end_buf, |
| 964 | &iwe, buf); |
Rui Paulo | 76aa5e7 | 2009-11-18 18:22:59 +0000 | [diff] [blame] | 965 | sprintf(buf, "Authentication ID: 0x%02X", cfg[4]); |
| 966 | iwe.u.data.length = strlen(buf); |
| 967 | current_ev = iwe_stream_add_point(info, current_ev, |
| 968 | end_buf, |
| 969 | &iwe, buf); |
| 970 | sprintf(buf, "Formation Info: 0x%02X", cfg[5]); |
| 971 | iwe.u.data.length = strlen(buf); |
| 972 | current_ev = iwe_stream_add_point(info, current_ev, |
| 973 | end_buf, |
| 974 | &iwe, buf); |
| 975 | sprintf(buf, "Capabilities: 0x%02X", cfg[6]); |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 976 | iwe.u.data.length = strlen(buf); |
| 977 | current_ev = iwe_stream_add_point(info, current_ev, |
| 978 | end_buf, |
| 979 | &iwe, buf); |
| 980 | kfree(buf); |
| 981 | break; |
| 982 | case WLAN_EID_SUPP_RATES: |
| 983 | case WLAN_EID_EXT_SUPP_RATES: |
| 984 | /* display all supported rates in readable format */ |
| 985 | p = current_ev + iwe_stream_lcp_len(info); |
| 986 | |
| 987 | memset(&iwe, 0, sizeof(iwe)); |
| 988 | iwe.cmd = SIOCGIWRATE; |
| 989 | /* Those two flags are ignored... */ |
| 990 | iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0; |
| 991 | |
| 992 | for (i = 0; i < ie[1]; i++) { |
| 993 | iwe.u.bitrate.value = |
| 994 | ((ie[i + 2] & 0x7f) * 500000); |
| 995 | p = iwe_stream_add_value(info, current_ev, p, |
| 996 | end_buf, &iwe, IW_EV_PARAM_LEN); |
| 997 | } |
| 998 | current_ev = p; |
| 999 | break; |
| 1000 | } |
| 1001 | rem -= ie[1] + 2; |
| 1002 | ie += ie[1] + 2; |
| 1003 | } |
| 1004 | |
Joe Perches | f64f9e7 | 2009-11-29 16:55:45 -0800 | [diff] [blame] | 1005 | if (bss->pub.capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS) || |
| 1006 | ismesh) { |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 1007 | memset(&iwe, 0, sizeof(iwe)); |
| 1008 | iwe.cmd = SIOCGIWMODE; |
| 1009 | if (ismesh) |
| 1010 | iwe.u.mode = IW_MODE_MESH; |
| 1011 | else if (bss->pub.capability & WLAN_CAPABILITY_ESS) |
| 1012 | iwe.u.mode = IW_MODE_MASTER; |
| 1013 | else |
| 1014 | iwe.u.mode = IW_MODE_ADHOC; |
| 1015 | current_ev = iwe_stream_add_event(info, current_ev, end_buf, |
| 1016 | &iwe, IW_EV_UINT_LEN); |
| 1017 | } |
| 1018 | |
| 1019 | buf = kmalloc(30, GFP_ATOMIC); |
| 1020 | if (buf) { |
| 1021 | memset(&iwe, 0, sizeof(iwe)); |
| 1022 | iwe.cmd = IWEVCUSTOM; |
| 1023 | sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->pub.tsf)); |
| 1024 | iwe.u.data.length = strlen(buf); |
| 1025 | current_ev = iwe_stream_add_point(info, current_ev, end_buf, |
| 1026 | &iwe, buf); |
| 1027 | memset(&iwe, 0, sizeof(iwe)); |
| 1028 | iwe.cmd = IWEVCUSTOM; |
Dan Williams | cb3a8ee | 2009-02-11 17:14:43 -0500 | [diff] [blame] | 1029 | sprintf(buf, " Last beacon: %ums ago", |
| 1030 | elapsed_jiffies_msecs(bss->ts)); |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 1031 | iwe.u.data.length = strlen(buf); |
| 1032 | current_ev = iwe_stream_add_point(info, current_ev, |
| 1033 | end_buf, &iwe, buf); |
| 1034 | kfree(buf); |
| 1035 | } |
| 1036 | |
| 1037 | ieee80211_scan_add_ies(info, &bss->pub, ¤t_ev, end_buf); |
| 1038 | |
| 1039 | return current_ev; |
| 1040 | } |
| 1041 | |
| 1042 | |
| 1043 | static int ieee80211_scan_results(struct cfg80211_registered_device *dev, |
| 1044 | struct iw_request_info *info, |
| 1045 | char *buf, size_t len) |
| 1046 | { |
| 1047 | char *current_ev = buf; |
| 1048 | char *end_buf = buf + len; |
| 1049 | struct cfg80211_internal_bss *bss; |
| 1050 | |
| 1051 | spin_lock_bh(&dev->bss_lock); |
| 1052 | cfg80211_bss_expire(dev); |
| 1053 | |
| 1054 | list_for_each_entry(bss, &dev->bss_list, list) { |
| 1055 | if (buf + len - current_ev <= IW_EV_ADDR_LEN) { |
| 1056 | spin_unlock_bh(&dev->bss_lock); |
| 1057 | return -E2BIG; |
| 1058 | } |
Johannes Berg | 77965c9 | 2009-02-18 18:45:06 +0100 | [diff] [blame] | 1059 | current_ev = ieee80211_bss(&dev->wiphy, info, bss, |
| 1060 | current_ev, end_buf); |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 1061 | } |
| 1062 | spin_unlock_bh(&dev->bss_lock); |
| 1063 | return current_ev - buf; |
| 1064 | } |
| 1065 | |
| 1066 | |
| 1067 | int cfg80211_wext_giwscan(struct net_device *dev, |
| 1068 | struct iw_request_info *info, |
| 1069 | struct iw_point *data, char *extra) |
| 1070 | { |
| 1071 | struct cfg80211_registered_device *rdev; |
| 1072 | int res; |
| 1073 | |
| 1074 | if (!netif_running(dev)) |
| 1075 | return -ENETDOWN; |
| 1076 | |
Johannes Berg | 463d018 | 2009-07-14 00:33:35 +0200 | [diff] [blame] | 1077 | rdev = cfg80211_get_dev_from_ifindex(dev_net(dev), dev->ifindex); |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 1078 | |
| 1079 | if (IS_ERR(rdev)) |
| 1080 | return PTR_ERR(rdev); |
| 1081 | |
| 1082 | if (rdev->scan_req) { |
| 1083 | res = -EAGAIN; |
| 1084 | goto out; |
| 1085 | } |
| 1086 | |
| 1087 | res = ieee80211_scan_results(rdev, info, extra, data->length); |
| 1088 | data->length = 0; |
| 1089 | if (res >= 0) { |
| 1090 | data->length = res; |
| 1091 | res = 0; |
| 1092 | } |
| 1093 | |
| 1094 | out: |
Johannes Berg | 4d0c8ae | 2009-07-07 03:56:09 +0200 | [diff] [blame] | 1095 | cfg80211_unlock_rdev(rdev); |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 1096 | return res; |
| 1097 | } |
Johannes Berg | ba44cb7 | 2009-04-20 18:49:39 +0200 | [diff] [blame] | 1098 | EXPORT_SYMBOL_GPL(cfg80211_wext_giwscan); |
Johannes Berg | 2a51931 | 2009-02-10 21:25:55 +0100 | [diff] [blame] | 1099 | #endif |