1 /* 2 * This is the new netlink-based wireless configuration interface. 3 * 4 * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net> 5 */ 6 7 #include <linux/if.h> 8 #include <linux/module.h> 9 #include <linux/err.h> 10 #include <linux/slab.h> 11 #include <linux/list.h> 12 #include <linux/if_ether.h> 13 #include <linux/ieee80211.h> 14 #include <linux/nl80211.h> 15 #include <linux/rtnetlink.h> 16 #include <linux/netlink.h> 17 #include <linux/etherdevice.h> 18 #include <net/net_namespace.h> 19 #include <net/genetlink.h> 20 #include <net/cfg80211.h> 21 #include <net/sock.h> 22 #include "core.h" 23 #include "nl80211.h" 24 #include "reg.h" 25 26 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb, 27 struct genl_info *info); 28 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb, 29 struct genl_info *info); 30 31 /* the netlink family */ 32 static struct genl_family nl80211_fam = { 33 .id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */ 34 .name = "nl80211", /* have users key off the name instead */ 35 .hdrsize = 0, /* no private header */ 36 .version = 1, /* no particular meaning now */ 37 .maxattr = NL80211_ATTR_MAX, 38 .netnsok = true, 39 .pre_doit = nl80211_pre_doit, 40 .post_doit = nl80211_post_doit, 41 }; 42 43 /* internal helper: get rdev and dev */ 44 static int get_rdev_dev_by_info_ifindex(struct genl_info *info, 45 struct cfg80211_registered_device **rdev, 46 struct net_device **dev) 47 { 48 struct nlattr **attrs = info->attrs; 49 int ifindex; 50 51 if (!attrs[NL80211_ATTR_IFINDEX]) 52 return -EINVAL; 53 54 ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]); 55 *dev = dev_get_by_index(genl_info_net(info), ifindex); 56 if (!*dev) 57 return -ENODEV; 58 59 *rdev = cfg80211_get_dev_from_ifindex(genl_info_net(info), ifindex); 60 if (IS_ERR(*rdev)) { 61 dev_put(*dev); 62 return PTR_ERR(*rdev); 63 } 64 65 return 0; 66 } 67 68 /* policy for the attributes */ 69 static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = { 70 [NL80211_ATTR_WIPHY] = { .type = NLA_U32 }, 71 [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING, 72 .len = 20-1 }, 73 [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED }, 74 [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 }, 75 [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 }, 76 [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 }, 77 [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 }, 78 [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 }, 79 [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 }, 80 [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 }, 81 82 [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 }, 83 [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 }, 84 [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 }, 85 86 [NL80211_ATTR_MAC] = { .type = NLA_BINARY, .len = ETH_ALEN }, 87 [NL80211_ATTR_PREV_BSSID] = { .type = NLA_BINARY, .len = ETH_ALEN }, 88 89 [NL80211_ATTR_KEY] = { .type = NLA_NESTED, }, 90 [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY, 91 .len = WLAN_MAX_KEY_LEN }, 92 [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 }, 93 [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 }, 94 [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG }, 95 [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 }, 96 [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 }, 97 98 [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 }, 99 [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 }, 100 [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY, 101 .len = IEEE80211_MAX_DATA_LEN }, 102 [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY, 103 .len = IEEE80211_MAX_DATA_LEN }, 104 [NL80211_ATTR_STA_AID] = { .type = NLA_U16 }, 105 [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED }, 106 [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 }, 107 [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY, 108 .len = NL80211_MAX_SUPP_RATES }, 109 [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 }, 110 [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 }, 111 [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ }, 112 [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY, 113 .len = IEEE80211_MAX_MESH_ID_LEN }, 114 [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 }, 115 116 [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 }, 117 [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED }, 118 119 [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 }, 120 [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 }, 121 [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 }, 122 [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY, 123 .len = NL80211_MAX_SUPP_RATES }, 124 [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 }, 125 126 [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED }, 127 [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG }, 128 129 [NL80211_ATTR_HT_CAPABILITY] = { .type = NLA_BINARY, 130 .len = NL80211_HT_CAPABILITY_LEN }, 131 132 [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 }, 133 [NL80211_ATTR_IE] = { .type = NLA_BINARY, 134 .len = IEEE80211_MAX_DATA_LEN }, 135 [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED }, 136 [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED }, 137 138 [NL80211_ATTR_SSID] = { .type = NLA_BINARY, 139 .len = IEEE80211_MAX_SSID_LEN }, 140 [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 }, 141 [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 }, 142 [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG }, 143 [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG }, 144 [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 }, 145 [NL80211_ATTR_STA_FLAGS2] = { 146 .len = sizeof(struct nl80211_sta_flag_update), 147 }, 148 [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG }, 149 [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 }, 150 [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG }, 151 [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG }, 152 [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 }, 153 [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 }, 154 [NL80211_ATTR_PID] = { .type = NLA_U32 }, 155 [NL80211_ATTR_4ADDR] = { .type = NLA_U8 }, 156 [NL80211_ATTR_PMKID] = { .type = NLA_BINARY, 157 .len = WLAN_PMKID_LEN }, 158 [NL80211_ATTR_DURATION] = { .type = NLA_U32 }, 159 [NL80211_ATTR_COOKIE] = { .type = NLA_U64 }, 160 [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED }, 161 [NL80211_ATTR_FRAME] = { .type = NLA_BINARY, 162 .len = IEEE80211_MAX_DATA_LEN }, 163 [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, }, 164 [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 }, 165 [NL80211_ATTR_CQM] = { .type = NLA_NESTED, }, 166 [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG }, 167 [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 }, 168 [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 }, 169 [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 }, 170 [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 }, 171 [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 }, 172 [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 }, 173 [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 }, 174 [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG }, 175 [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED }, 176 [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED }, 177 [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 }, 178 [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 }, 179 }; 180 181 /* policy for the key attributes */ 182 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = { 183 [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN }, 184 [NL80211_KEY_IDX] = { .type = NLA_U8 }, 185 [NL80211_KEY_CIPHER] = { .type = NLA_U32 }, 186 [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 }, 187 [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG }, 188 [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG }, 189 [NL80211_KEY_TYPE] = { .type = NLA_U32 }, 190 [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED }, 191 }; 192 193 /* policy for the key default flags */ 194 static const struct nla_policy 195 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = { 196 [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG }, 197 [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG }, 198 }; 199 200 /* policy for WoWLAN attributes */ 201 static const struct nla_policy 202 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = { 203 [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG }, 204 [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG }, 205 [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG }, 206 [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED }, 207 }; 208 209 /* ifidx get helper */ 210 static int nl80211_get_ifidx(struct netlink_callback *cb) 211 { 212 int res; 213 214 res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize, 215 nl80211_fam.attrbuf, nl80211_fam.maxattr, 216 nl80211_policy); 217 if (res) 218 return res; 219 220 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]) 221 return -EINVAL; 222 223 res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]); 224 if (!res) 225 return -EINVAL; 226 return res; 227 } 228 229 static int nl80211_prepare_netdev_dump(struct sk_buff *skb, 230 struct netlink_callback *cb, 231 struct cfg80211_registered_device **rdev, 232 struct net_device **dev) 233 { 234 int ifidx = cb->args[0]; 235 int err; 236 237 if (!ifidx) 238 ifidx = nl80211_get_ifidx(cb); 239 if (ifidx < 0) 240 return ifidx; 241 242 cb->args[0] = ifidx; 243 244 rtnl_lock(); 245 246 *dev = __dev_get_by_index(sock_net(skb->sk), ifidx); 247 if (!*dev) { 248 err = -ENODEV; 249 goto out_rtnl; 250 } 251 252 *rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx); 253 if (IS_ERR(*rdev)) { 254 err = PTR_ERR(*rdev); 255 goto out_rtnl; 256 } 257 258 return 0; 259 out_rtnl: 260 rtnl_unlock(); 261 return err; 262 } 263 264 static void nl80211_finish_netdev_dump(struct cfg80211_registered_device *rdev) 265 { 266 cfg80211_unlock_rdev(rdev); 267 rtnl_unlock(); 268 } 269 270 /* IE validation */ 271 static bool is_valid_ie_attr(const struct nlattr *attr) 272 { 273 const u8 *pos; 274 int len; 275 276 if (!attr) 277 return true; 278 279 pos = nla_data(attr); 280 len = nla_len(attr); 281 282 while (len) { 283 u8 elemlen; 284 285 if (len < 2) 286 return false; 287 len -= 2; 288 289 elemlen = pos[1]; 290 if (elemlen > len) 291 return false; 292 293 len -= elemlen; 294 pos += 2 + elemlen; 295 } 296 297 return true; 298 } 299 300 /* message building helper */ 301 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq, 302 int flags, u8 cmd) 303 { 304 /* since there is no private header just add the generic one */ 305 return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd); 306 } 307 308 static int nl80211_msg_put_channel(struct sk_buff *msg, 309 struct ieee80211_channel *chan) 310 { 311 NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_FREQ, 312 chan->center_freq); 313 314 if (chan->flags & IEEE80211_CHAN_DISABLED) 315 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_DISABLED); 316 if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) 317 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN); 318 if (chan->flags & IEEE80211_CHAN_NO_IBSS) 319 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_NO_IBSS); 320 if (chan->flags & IEEE80211_CHAN_RADAR) 321 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_RADAR); 322 323 NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER, 324 DBM_TO_MBM(chan->max_power)); 325 326 return 0; 327 328 nla_put_failure: 329 return -ENOBUFS; 330 } 331 332 /* netlink command implementations */ 333 334 struct key_parse { 335 struct key_params p; 336 int idx; 337 int type; 338 bool def, defmgmt; 339 bool def_uni, def_multi; 340 }; 341 342 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k) 343 { 344 struct nlattr *tb[NL80211_KEY_MAX + 1]; 345 int err = nla_parse_nested(tb, NL80211_KEY_MAX, key, 346 nl80211_key_policy); 347 if (err) 348 return err; 349 350 k->def = !!tb[NL80211_KEY_DEFAULT]; 351 k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT]; 352 353 if (k->def) { 354 k->def_uni = true; 355 k->def_multi = true; 356 } 357 if (k->defmgmt) 358 k->def_multi = true; 359 360 if (tb[NL80211_KEY_IDX]) 361 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]); 362 363 if (tb[NL80211_KEY_DATA]) { 364 k->p.key = nla_data(tb[NL80211_KEY_DATA]); 365 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]); 366 } 367 368 if (tb[NL80211_KEY_SEQ]) { 369 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]); 370 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]); 371 } 372 373 if (tb[NL80211_KEY_CIPHER]) 374 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]); 375 376 if (tb[NL80211_KEY_TYPE]) { 377 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]); 378 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES) 379 return -EINVAL; 380 } 381 382 if (tb[NL80211_KEY_DEFAULT_TYPES]) { 383 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES]; 384 int err = nla_parse_nested(kdt, 385 NUM_NL80211_KEY_DEFAULT_TYPES - 1, 386 tb[NL80211_KEY_DEFAULT_TYPES], 387 nl80211_key_default_policy); 388 if (err) 389 return err; 390 391 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST]; 392 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST]; 393 } 394 395 return 0; 396 } 397 398 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k) 399 { 400 if (info->attrs[NL80211_ATTR_KEY_DATA]) { 401 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]); 402 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]); 403 } 404 405 if (info->attrs[NL80211_ATTR_KEY_SEQ]) { 406 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]); 407 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]); 408 } 409 410 if (info->attrs[NL80211_ATTR_KEY_IDX]) 411 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]); 412 413 if (info->attrs[NL80211_ATTR_KEY_CIPHER]) 414 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]); 415 416 k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT]; 417 k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT]; 418 419 if (k->def) { 420 k->def_uni = true; 421 k->def_multi = true; 422 } 423 if (k->defmgmt) 424 k->def_multi = true; 425 426 if (info->attrs[NL80211_ATTR_KEY_TYPE]) { 427 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]); 428 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES) 429 return -EINVAL; 430 } 431 432 if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) { 433 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES]; 434 int err = nla_parse_nested( 435 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1, 436 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES], 437 nl80211_key_default_policy); 438 if (err) 439 return err; 440 441 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST]; 442 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST]; 443 } 444 445 return 0; 446 } 447 448 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k) 449 { 450 int err; 451 452 memset(k, 0, sizeof(*k)); 453 k->idx = -1; 454 k->type = -1; 455 456 if (info->attrs[NL80211_ATTR_KEY]) 457 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k); 458 else 459 err = nl80211_parse_key_old(info, k); 460 461 if (err) 462 return err; 463 464 if (k->def && k->defmgmt) 465 return -EINVAL; 466 467 if (k->defmgmt) { 468 if (k->def_uni || !k->def_multi) 469 return -EINVAL; 470 } 471 472 if (k->idx != -1) { 473 if (k->defmgmt) { 474 if (k->idx < 4 || k->idx > 5) 475 return -EINVAL; 476 } else if (k->def) { 477 if (k->idx < 0 || k->idx > 3) 478 return -EINVAL; 479 } else { 480 if (k->idx < 0 || k->idx > 5) 481 return -EINVAL; 482 } 483 } 484 485 return 0; 486 } 487 488 static struct cfg80211_cached_keys * 489 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev, 490 struct nlattr *keys) 491 { 492 struct key_parse parse; 493 struct nlattr *key; 494 struct cfg80211_cached_keys *result; 495 int rem, err, def = 0; 496 497 result = kzalloc(sizeof(*result), GFP_KERNEL); 498 if (!result) 499 return ERR_PTR(-ENOMEM); 500 501 result->def = -1; 502 result->defmgmt = -1; 503 504 nla_for_each_nested(key, keys, rem) { 505 memset(&parse, 0, sizeof(parse)); 506 parse.idx = -1; 507 508 err = nl80211_parse_key_new(key, &parse); 509 if (err) 510 goto error; 511 err = -EINVAL; 512 if (!parse.p.key) 513 goto error; 514 if (parse.idx < 0 || parse.idx > 4) 515 goto error; 516 if (parse.def) { 517 if (def) 518 goto error; 519 def = 1; 520 result->def = parse.idx; 521 if (!parse.def_uni || !parse.def_multi) 522 goto error; 523 } else if (parse.defmgmt) 524 goto error; 525 err = cfg80211_validate_key_settings(rdev, &parse.p, 526 parse.idx, false, NULL); 527 if (err) 528 goto error; 529 result->params[parse.idx].cipher = parse.p.cipher; 530 result->params[parse.idx].key_len = parse.p.key_len; 531 result->params[parse.idx].key = result->data[parse.idx]; 532 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len); 533 } 534 535 return result; 536 error: 537 kfree(result); 538 return ERR_PTR(err); 539 } 540 541 static int nl80211_key_allowed(struct wireless_dev *wdev) 542 { 543 ASSERT_WDEV_LOCK(wdev); 544 545 switch (wdev->iftype) { 546 case NL80211_IFTYPE_AP: 547 case NL80211_IFTYPE_AP_VLAN: 548 case NL80211_IFTYPE_P2P_GO: 549 case NL80211_IFTYPE_MESH_POINT: 550 break; 551 case NL80211_IFTYPE_ADHOC: 552 if (!wdev->current_bss) 553 return -ENOLINK; 554 break; 555 case NL80211_IFTYPE_STATION: 556 case NL80211_IFTYPE_P2P_CLIENT: 557 if (wdev->sme_state != CFG80211_SME_CONNECTED) 558 return -ENOLINK; 559 break; 560 default: 561 return -EINVAL; 562 } 563 564 return 0; 565 } 566 567 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes) 568 { 569 struct nlattr *nl_modes = nla_nest_start(msg, attr); 570 int i; 571 572 if (!nl_modes) 573 goto nla_put_failure; 574 575 i = 0; 576 while (ifmodes) { 577 if (ifmodes & 1) 578 NLA_PUT_FLAG(msg, i); 579 ifmodes >>= 1; 580 i++; 581 } 582 583 nla_nest_end(msg, nl_modes); 584 return 0; 585 586 nla_put_failure: 587 return -ENOBUFS; 588 } 589 590 static int nl80211_put_iface_combinations(struct wiphy *wiphy, 591 struct sk_buff *msg) 592 { 593 struct nlattr *nl_combis; 594 int i, j; 595 596 nl_combis = nla_nest_start(msg, 597 NL80211_ATTR_INTERFACE_COMBINATIONS); 598 if (!nl_combis) 599 goto nla_put_failure; 600 601 for (i = 0; i < wiphy->n_iface_combinations; i++) { 602 const struct ieee80211_iface_combination *c; 603 struct nlattr *nl_combi, *nl_limits; 604 605 c = &wiphy->iface_combinations[i]; 606 607 nl_combi = nla_nest_start(msg, i + 1); 608 if (!nl_combi) 609 goto nla_put_failure; 610 611 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS); 612 if (!nl_limits) 613 goto nla_put_failure; 614 615 for (j = 0; j < c->n_limits; j++) { 616 struct nlattr *nl_limit; 617 618 nl_limit = nla_nest_start(msg, j + 1); 619 if (!nl_limit) 620 goto nla_put_failure; 621 NLA_PUT_U32(msg, NL80211_IFACE_LIMIT_MAX, 622 c->limits[j].max); 623 if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES, 624 c->limits[j].types)) 625 goto nla_put_failure; 626 nla_nest_end(msg, nl_limit); 627 } 628 629 nla_nest_end(msg, nl_limits); 630 631 if (c->beacon_int_infra_match) 632 NLA_PUT_FLAG(msg, 633 NL80211_IFACE_COMB_STA_AP_BI_MATCH); 634 NLA_PUT_U32(msg, NL80211_IFACE_COMB_NUM_CHANNELS, 635 c->num_different_channels); 636 NLA_PUT_U32(msg, NL80211_IFACE_COMB_MAXNUM, 637 c->max_interfaces); 638 639 nla_nest_end(msg, nl_combi); 640 } 641 642 nla_nest_end(msg, nl_combis); 643 644 return 0; 645 nla_put_failure: 646 return -ENOBUFS; 647 } 648 649 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags, 650 struct cfg80211_registered_device *dev) 651 { 652 void *hdr; 653 struct nlattr *nl_bands, *nl_band; 654 struct nlattr *nl_freqs, *nl_freq; 655 struct nlattr *nl_rates, *nl_rate; 656 struct nlattr *nl_cmds; 657 enum ieee80211_band band; 658 struct ieee80211_channel *chan; 659 struct ieee80211_rate *rate; 660 int i; 661 const struct ieee80211_txrx_stypes *mgmt_stypes = 662 dev->wiphy.mgmt_stypes; 663 664 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY); 665 if (!hdr) 666 return -1; 667 668 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx); 669 NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy)); 670 671 NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, 672 cfg80211_rdev_list_generation); 673 674 NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT, 675 dev->wiphy.retry_short); 676 NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_LONG, 677 dev->wiphy.retry_long); 678 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD, 679 dev->wiphy.frag_threshold); 680 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD, 681 dev->wiphy.rts_threshold); 682 NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS, 683 dev->wiphy.coverage_class); 684 NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS, 685 dev->wiphy.max_scan_ssids); 686 NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN, 687 dev->wiphy.max_scan_ie_len); 688 689 if (dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) 690 NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_IBSS_RSN); 691 if (dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) 692 NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_MESH_AUTH); 693 694 NLA_PUT(msg, NL80211_ATTR_CIPHER_SUITES, 695 sizeof(u32) * dev->wiphy.n_cipher_suites, 696 dev->wiphy.cipher_suites); 697 698 NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_PMKIDS, 699 dev->wiphy.max_num_pmkids); 700 701 if (dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) 702 NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE); 703 704 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX, 705 dev->wiphy.available_antennas_tx); 706 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX, 707 dev->wiphy.available_antennas_rx); 708 709 if ((dev->wiphy.available_antennas_tx || 710 dev->wiphy.available_antennas_rx) && dev->ops->get_antenna) { 711 u32 tx_ant = 0, rx_ant = 0; 712 int res; 713 res = dev->ops->get_antenna(&dev->wiphy, &tx_ant, &rx_ant); 714 if (!res) { 715 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_TX, tx_ant); 716 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_RX, rx_ant); 717 } 718 } 719 720 if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES, 721 dev->wiphy.interface_modes)) 722 goto nla_put_failure; 723 724 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS); 725 if (!nl_bands) 726 goto nla_put_failure; 727 728 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 729 if (!dev->wiphy.bands[band]) 730 continue; 731 732 nl_band = nla_nest_start(msg, band); 733 if (!nl_band) 734 goto nla_put_failure; 735 736 /* add HT info */ 737 if (dev->wiphy.bands[band]->ht_cap.ht_supported) { 738 NLA_PUT(msg, NL80211_BAND_ATTR_HT_MCS_SET, 739 sizeof(dev->wiphy.bands[band]->ht_cap.mcs), 740 &dev->wiphy.bands[band]->ht_cap.mcs); 741 NLA_PUT_U16(msg, NL80211_BAND_ATTR_HT_CAPA, 742 dev->wiphy.bands[band]->ht_cap.cap); 743 NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR, 744 dev->wiphy.bands[band]->ht_cap.ampdu_factor); 745 NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY, 746 dev->wiphy.bands[band]->ht_cap.ampdu_density); 747 } 748 749 /* add frequencies */ 750 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS); 751 if (!nl_freqs) 752 goto nla_put_failure; 753 754 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) { 755 nl_freq = nla_nest_start(msg, i); 756 if (!nl_freq) 757 goto nla_put_failure; 758 759 chan = &dev->wiphy.bands[band]->channels[i]; 760 761 if (nl80211_msg_put_channel(msg, chan)) 762 goto nla_put_failure; 763 764 nla_nest_end(msg, nl_freq); 765 } 766 767 nla_nest_end(msg, nl_freqs); 768 769 /* add bitrates */ 770 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES); 771 if (!nl_rates) 772 goto nla_put_failure; 773 774 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) { 775 nl_rate = nla_nest_start(msg, i); 776 if (!nl_rate) 777 goto nla_put_failure; 778 779 rate = &dev->wiphy.bands[band]->bitrates[i]; 780 NLA_PUT_U32(msg, NL80211_BITRATE_ATTR_RATE, 781 rate->bitrate); 782 if (rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) 783 NLA_PUT_FLAG(msg, 784 NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE); 785 786 nla_nest_end(msg, nl_rate); 787 } 788 789 nla_nest_end(msg, nl_rates); 790 791 nla_nest_end(msg, nl_band); 792 } 793 nla_nest_end(msg, nl_bands); 794 795 nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS); 796 if (!nl_cmds) 797 goto nla_put_failure; 798 799 i = 0; 800 #define CMD(op, n) \ 801 do { \ 802 if (dev->ops->op) { \ 803 i++; \ 804 NLA_PUT_U32(msg, i, NL80211_CMD_ ## n); \ 805 } \ 806 } while (0) 807 808 CMD(add_virtual_intf, NEW_INTERFACE); 809 CMD(change_virtual_intf, SET_INTERFACE); 810 CMD(add_key, NEW_KEY); 811 CMD(add_beacon, NEW_BEACON); 812 CMD(add_station, NEW_STATION); 813 CMD(add_mpath, NEW_MPATH); 814 CMD(update_mesh_config, SET_MESH_CONFIG); 815 CMD(change_bss, SET_BSS); 816 CMD(auth, AUTHENTICATE); 817 CMD(assoc, ASSOCIATE); 818 CMD(deauth, DEAUTHENTICATE); 819 CMD(disassoc, DISASSOCIATE); 820 CMD(join_ibss, JOIN_IBSS); 821 CMD(join_mesh, JOIN_MESH); 822 CMD(set_pmksa, SET_PMKSA); 823 CMD(del_pmksa, DEL_PMKSA); 824 CMD(flush_pmksa, FLUSH_PMKSA); 825 CMD(remain_on_channel, REMAIN_ON_CHANNEL); 826 CMD(set_bitrate_mask, SET_TX_BITRATE_MASK); 827 CMD(mgmt_tx, FRAME); 828 CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL); 829 if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) { 830 i++; 831 NLA_PUT_U32(msg, i, NL80211_CMD_SET_WIPHY_NETNS); 832 } 833 CMD(set_channel, SET_CHANNEL); 834 CMD(set_wds_peer, SET_WDS_PEER); 835 if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) 836 CMD(sched_scan_start, START_SCHED_SCAN); 837 838 #undef CMD 839 840 if (dev->ops->connect || dev->ops->auth) { 841 i++; 842 NLA_PUT_U32(msg, i, NL80211_CMD_CONNECT); 843 } 844 845 if (dev->ops->disconnect || dev->ops->deauth) { 846 i++; 847 NLA_PUT_U32(msg, i, NL80211_CMD_DISCONNECT); 848 } 849 850 nla_nest_end(msg, nl_cmds); 851 852 if (dev->ops->remain_on_channel) 853 NLA_PUT_U32(msg, NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION, 854 dev->wiphy.max_remain_on_channel_duration); 855 856 /* for now at least assume all drivers have it */ 857 if (dev->ops->mgmt_tx) 858 NLA_PUT_FLAG(msg, NL80211_ATTR_OFFCHANNEL_TX_OK); 859 860 if (mgmt_stypes) { 861 u16 stypes; 862 struct nlattr *nl_ftypes, *nl_ifs; 863 enum nl80211_iftype ift; 864 865 nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES); 866 if (!nl_ifs) 867 goto nla_put_failure; 868 869 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) { 870 nl_ftypes = nla_nest_start(msg, ift); 871 if (!nl_ftypes) 872 goto nla_put_failure; 873 i = 0; 874 stypes = mgmt_stypes[ift].tx; 875 while (stypes) { 876 if (stypes & 1) 877 NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE, 878 (i << 4) | IEEE80211_FTYPE_MGMT); 879 stypes >>= 1; 880 i++; 881 } 882 nla_nest_end(msg, nl_ftypes); 883 } 884 885 nla_nest_end(msg, nl_ifs); 886 887 nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES); 888 if (!nl_ifs) 889 goto nla_put_failure; 890 891 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) { 892 nl_ftypes = nla_nest_start(msg, ift); 893 if (!nl_ftypes) 894 goto nla_put_failure; 895 i = 0; 896 stypes = mgmt_stypes[ift].rx; 897 while (stypes) { 898 if (stypes & 1) 899 NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE, 900 (i << 4) | IEEE80211_FTYPE_MGMT); 901 stypes >>= 1; 902 i++; 903 } 904 nla_nest_end(msg, nl_ftypes); 905 } 906 nla_nest_end(msg, nl_ifs); 907 } 908 909 if (dev->wiphy.wowlan.flags || dev->wiphy.wowlan.n_patterns) { 910 struct nlattr *nl_wowlan; 911 912 nl_wowlan = nla_nest_start(msg, 913 NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED); 914 if (!nl_wowlan) 915 goto nla_put_failure; 916 917 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_ANY) 918 NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_ANY); 919 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_DISCONNECT) 920 NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_DISCONNECT); 921 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_MAGIC_PKT) 922 NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT); 923 if (dev->wiphy.wowlan.n_patterns) { 924 struct nl80211_wowlan_pattern_support pat = { 925 .max_patterns = dev->wiphy.wowlan.n_patterns, 926 .min_pattern_len = 927 dev->wiphy.wowlan.pattern_min_len, 928 .max_pattern_len = 929 dev->wiphy.wowlan.pattern_max_len, 930 }; 931 NLA_PUT(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN, 932 sizeof(pat), &pat); 933 } 934 935 nla_nest_end(msg, nl_wowlan); 936 } 937 938 if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES, 939 dev->wiphy.software_iftypes)) 940 goto nla_put_failure; 941 942 if (nl80211_put_iface_combinations(&dev->wiphy, msg)) 943 goto nla_put_failure; 944 945 return genlmsg_end(msg, hdr); 946 947 nla_put_failure: 948 genlmsg_cancel(msg, hdr); 949 return -EMSGSIZE; 950 } 951 952 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb) 953 { 954 int idx = 0; 955 int start = cb->args[0]; 956 struct cfg80211_registered_device *dev; 957 958 mutex_lock(&cfg80211_mutex); 959 list_for_each_entry(dev, &cfg80211_rdev_list, list) { 960 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk))) 961 continue; 962 if (++idx <= start) 963 continue; 964 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid, 965 cb->nlh->nlmsg_seq, NLM_F_MULTI, 966 dev) < 0) { 967 idx--; 968 break; 969 } 970 } 971 mutex_unlock(&cfg80211_mutex); 972 973 cb->args[0] = idx; 974 975 return skb->len; 976 } 977 978 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info) 979 { 980 struct sk_buff *msg; 981 struct cfg80211_registered_device *dev = info->user_ptr[0]; 982 983 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 984 if (!msg) 985 return -ENOMEM; 986 987 if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0) { 988 nlmsg_free(msg); 989 return -ENOBUFS; 990 } 991 992 return genlmsg_reply(msg, info); 993 } 994 995 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = { 996 [NL80211_TXQ_ATTR_QUEUE] = { .type = NLA_U8 }, 997 [NL80211_TXQ_ATTR_TXOP] = { .type = NLA_U16 }, 998 [NL80211_TXQ_ATTR_CWMIN] = { .type = NLA_U16 }, 999 [NL80211_TXQ_ATTR_CWMAX] = { .type = NLA_U16 }, 1000 [NL80211_TXQ_ATTR_AIFS] = { .type = NLA_U8 }, 1001 }; 1002 1003 static int parse_txq_params(struct nlattr *tb[], 1004 struct ieee80211_txq_params *txq_params) 1005 { 1006 if (!tb[NL80211_TXQ_ATTR_QUEUE] || !tb[NL80211_TXQ_ATTR_TXOP] || 1007 !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] || 1008 !tb[NL80211_TXQ_ATTR_AIFS]) 1009 return -EINVAL; 1010 1011 txq_params->queue = nla_get_u8(tb[NL80211_TXQ_ATTR_QUEUE]); 1012 txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]); 1013 txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]); 1014 txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]); 1015 txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]); 1016 1017 return 0; 1018 } 1019 1020 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev) 1021 { 1022 /* 1023 * You can only set the channel explicitly for AP, mesh 1024 * and WDS type interfaces; all others have their channel 1025 * managed via their respective "establish a connection" 1026 * command (connect, join, ...) 1027 * 1028 * Monitors are special as they are normally slaved to 1029 * whatever else is going on, so they behave as though 1030 * you tried setting the wiphy channel itself. 1031 */ 1032 return !wdev || 1033 wdev->iftype == NL80211_IFTYPE_AP || 1034 wdev->iftype == NL80211_IFTYPE_WDS || 1035 wdev->iftype == NL80211_IFTYPE_MESH_POINT || 1036 wdev->iftype == NL80211_IFTYPE_MONITOR || 1037 wdev->iftype == NL80211_IFTYPE_P2P_GO; 1038 } 1039 1040 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev, 1041 struct wireless_dev *wdev, 1042 struct genl_info *info) 1043 { 1044 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT; 1045 u32 freq; 1046 int result; 1047 1048 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ]) 1049 return -EINVAL; 1050 1051 if (!nl80211_can_set_dev_channel(wdev)) 1052 return -EOPNOTSUPP; 1053 1054 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) { 1055 channel_type = nla_get_u32(info->attrs[ 1056 NL80211_ATTR_WIPHY_CHANNEL_TYPE]); 1057 if (channel_type != NL80211_CHAN_NO_HT && 1058 channel_type != NL80211_CHAN_HT20 && 1059 channel_type != NL80211_CHAN_HT40PLUS && 1060 channel_type != NL80211_CHAN_HT40MINUS) 1061 return -EINVAL; 1062 } 1063 1064 freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]); 1065 1066 mutex_lock(&rdev->devlist_mtx); 1067 if (wdev) { 1068 wdev_lock(wdev); 1069 result = cfg80211_set_freq(rdev, wdev, freq, channel_type); 1070 wdev_unlock(wdev); 1071 } else { 1072 result = cfg80211_set_freq(rdev, NULL, freq, channel_type); 1073 } 1074 mutex_unlock(&rdev->devlist_mtx); 1075 1076 return result; 1077 } 1078 1079 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info) 1080 { 1081 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 1082 struct net_device *netdev = info->user_ptr[1]; 1083 1084 return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info); 1085 } 1086 1087 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info) 1088 { 1089 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 1090 struct net_device *dev = info->user_ptr[1]; 1091 struct wireless_dev *wdev = dev->ieee80211_ptr; 1092 const u8 *bssid; 1093 1094 if (!info->attrs[NL80211_ATTR_MAC]) 1095 return -EINVAL; 1096 1097 if (netif_running(dev)) 1098 return -EBUSY; 1099 1100 if (!rdev->ops->set_wds_peer) 1101 return -EOPNOTSUPP; 1102 1103 if (wdev->iftype != NL80211_IFTYPE_WDS) 1104 return -EOPNOTSUPP; 1105 1106 bssid = nla_data(info->attrs[NL80211_ATTR_MAC]); 1107 return rdev->ops->set_wds_peer(wdev->wiphy, dev, bssid); 1108 } 1109 1110 1111 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info) 1112 { 1113 struct cfg80211_registered_device *rdev; 1114 struct net_device *netdev = NULL; 1115 struct wireless_dev *wdev; 1116 int result = 0, rem_txq_params = 0; 1117 struct nlattr *nl_txq_params; 1118 u32 changed; 1119 u8 retry_short = 0, retry_long = 0; 1120 u32 frag_threshold = 0, rts_threshold = 0; 1121 u8 coverage_class = 0; 1122 1123 /* 1124 * Try to find the wiphy and netdev. Normally this 1125 * function shouldn't need the netdev, but this is 1126 * done for backward compatibility -- previously 1127 * setting the channel was done per wiphy, but now 1128 * it is per netdev. Previous userland like hostapd 1129 * also passed a netdev to set_wiphy, so that it is 1130 * possible to let that go to the right netdev! 1131 */ 1132 mutex_lock(&cfg80211_mutex); 1133 1134 if (info->attrs[NL80211_ATTR_IFINDEX]) { 1135 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]); 1136 1137 netdev = dev_get_by_index(genl_info_net(info), ifindex); 1138 if (netdev && netdev->ieee80211_ptr) { 1139 rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy); 1140 mutex_lock(&rdev->mtx); 1141 } else 1142 netdev = NULL; 1143 } 1144 1145 if (!netdev) { 1146 rdev = __cfg80211_rdev_from_info(info); 1147 if (IS_ERR(rdev)) { 1148 mutex_unlock(&cfg80211_mutex); 1149 return PTR_ERR(rdev); 1150 } 1151 wdev = NULL; 1152 netdev = NULL; 1153 result = 0; 1154 1155 mutex_lock(&rdev->mtx); 1156 } else if (netif_running(netdev) && 1157 nl80211_can_set_dev_channel(netdev->ieee80211_ptr)) 1158 wdev = netdev->ieee80211_ptr; 1159 else 1160 wdev = NULL; 1161 1162 /* 1163 * end workaround code, by now the rdev is available 1164 * and locked, and wdev may or may not be NULL. 1165 */ 1166 1167 if (info->attrs[NL80211_ATTR_WIPHY_NAME]) 1168 result = cfg80211_dev_rename( 1169 rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME])); 1170 1171 mutex_unlock(&cfg80211_mutex); 1172 1173 if (result) 1174 goto bad_res; 1175 1176 if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) { 1177 struct ieee80211_txq_params txq_params; 1178 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1]; 1179 1180 if (!rdev->ops->set_txq_params) { 1181 result = -EOPNOTSUPP; 1182 goto bad_res; 1183 } 1184 1185 nla_for_each_nested(nl_txq_params, 1186 info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS], 1187 rem_txq_params) { 1188 nla_parse(tb, NL80211_TXQ_ATTR_MAX, 1189 nla_data(nl_txq_params), 1190 nla_len(nl_txq_params), 1191 txq_params_policy); 1192 result = parse_txq_params(tb, &txq_params); 1193 if (result) 1194 goto bad_res; 1195 1196 result = rdev->ops->set_txq_params(&rdev->wiphy, 1197 &txq_params); 1198 if (result) 1199 goto bad_res; 1200 } 1201 } 1202 1203 if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) { 1204 result = __nl80211_set_channel(rdev, wdev, info); 1205 if (result) 1206 goto bad_res; 1207 } 1208 1209 if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) { 1210 enum nl80211_tx_power_setting type; 1211 int idx, mbm = 0; 1212 1213 if (!rdev->ops->set_tx_power) { 1214 result = -EOPNOTSUPP; 1215 goto bad_res; 1216 } 1217 1218 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING; 1219 type = nla_get_u32(info->attrs[idx]); 1220 1221 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] && 1222 (type != NL80211_TX_POWER_AUTOMATIC)) { 1223 result = -EINVAL; 1224 goto bad_res; 1225 } 1226 1227 if (type != NL80211_TX_POWER_AUTOMATIC) { 1228 idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL; 1229 mbm = nla_get_u32(info->attrs[idx]); 1230 } 1231 1232 result = rdev->ops->set_tx_power(&rdev->wiphy, type, mbm); 1233 if (result) 1234 goto bad_res; 1235 } 1236 1237 if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] && 1238 info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) { 1239 u32 tx_ant, rx_ant; 1240 if ((!rdev->wiphy.available_antennas_tx && 1241 !rdev->wiphy.available_antennas_rx) || 1242 !rdev->ops->set_antenna) { 1243 result = -EOPNOTSUPP; 1244 goto bad_res; 1245 } 1246 1247 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]); 1248 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]); 1249 1250 /* reject antenna configurations which don't match the 1251 * available antenna masks, except for the "all" mask */ 1252 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) || 1253 (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) { 1254 result = -EINVAL; 1255 goto bad_res; 1256 } 1257 1258 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx; 1259 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx; 1260 1261 result = rdev->ops->set_antenna(&rdev->wiphy, tx_ant, rx_ant); 1262 if (result) 1263 goto bad_res; 1264 } 1265 1266 changed = 0; 1267 1268 if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) { 1269 retry_short = nla_get_u8( 1270 info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]); 1271 if (retry_short == 0) { 1272 result = -EINVAL; 1273 goto bad_res; 1274 } 1275 changed |= WIPHY_PARAM_RETRY_SHORT; 1276 } 1277 1278 if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) { 1279 retry_long = nla_get_u8( 1280 info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]); 1281 if (retry_long == 0) { 1282 result = -EINVAL; 1283 goto bad_res; 1284 } 1285 changed |= WIPHY_PARAM_RETRY_LONG; 1286 } 1287 1288 if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) { 1289 frag_threshold = nla_get_u32( 1290 info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]); 1291 if (frag_threshold < 256) { 1292 result = -EINVAL; 1293 goto bad_res; 1294 } 1295 if (frag_threshold != (u32) -1) { 1296 /* 1297 * Fragments (apart from the last one) are required to 1298 * have even length. Make the fragmentation code 1299 * simpler by stripping LSB should someone try to use 1300 * odd threshold value. 1301 */ 1302 frag_threshold &= ~0x1; 1303 } 1304 changed |= WIPHY_PARAM_FRAG_THRESHOLD; 1305 } 1306 1307 if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) { 1308 rts_threshold = nla_get_u32( 1309 info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]); 1310 changed |= WIPHY_PARAM_RTS_THRESHOLD; 1311 } 1312 1313 if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) { 1314 coverage_class = nla_get_u8( 1315 info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]); 1316 changed |= WIPHY_PARAM_COVERAGE_CLASS; 1317 } 1318 1319 if (changed) { 1320 u8 old_retry_short, old_retry_long; 1321 u32 old_frag_threshold, old_rts_threshold; 1322 u8 old_coverage_class; 1323 1324 if (!rdev->ops->set_wiphy_params) { 1325 result = -EOPNOTSUPP; 1326 goto bad_res; 1327 } 1328 1329 old_retry_short = rdev->wiphy.retry_short; 1330 old_retry_long = rdev->wiphy.retry_long; 1331 old_frag_threshold = rdev->wiphy.frag_threshold; 1332 old_rts_threshold = rdev->wiphy.rts_threshold; 1333 old_coverage_class = rdev->wiphy.coverage_class; 1334 1335 if (changed & WIPHY_PARAM_RETRY_SHORT) 1336 rdev->wiphy.retry_short = retry_short; 1337 if (changed & WIPHY_PARAM_RETRY_LONG) 1338 rdev->wiphy.retry_long = retry_long; 1339 if (changed & WIPHY_PARAM_FRAG_THRESHOLD) 1340 rdev->wiphy.frag_threshold = frag_threshold; 1341 if (changed & WIPHY_PARAM_RTS_THRESHOLD) 1342 rdev->wiphy.rts_threshold = rts_threshold; 1343 if (changed & WIPHY_PARAM_COVERAGE_CLASS) 1344 rdev->wiphy.coverage_class = coverage_class; 1345 1346 result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed); 1347 if (result) { 1348 rdev->wiphy.retry_short = old_retry_short; 1349 rdev->wiphy.retry_long = old_retry_long; 1350 rdev->wiphy.frag_threshold = old_frag_threshold; 1351 rdev->wiphy.rts_threshold = old_rts_threshold; 1352 rdev->wiphy.coverage_class = old_coverage_class; 1353 } 1354 } 1355 1356 bad_res: 1357 mutex_unlock(&rdev->mtx); 1358 if (netdev) 1359 dev_put(netdev); 1360 return result; 1361 } 1362 1363 1364 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags, 1365 struct cfg80211_registered_device *rdev, 1366 struct net_device *dev) 1367 { 1368 void *hdr; 1369 1370 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE); 1371 if (!hdr) 1372 return -1; 1373 1374 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex); 1375 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx); 1376 NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name); 1377 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype); 1378 1379 NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, 1380 rdev->devlist_generation ^ 1381 (cfg80211_rdev_list_generation << 2)); 1382 1383 return genlmsg_end(msg, hdr); 1384 1385 nla_put_failure: 1386 genlmsg_cancel(msg, hdr); 1387 return -EMSGSIZE; 1388 } 1389 1390 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb) 1391 { 1392 int wp_idx = 0; 1393 int if_idx = 0; 1394 int wp_start = cb->args[0]; 1395 int if_start = cb->args[1]; 1396 struct cfg80211_registered_device *rdev; 1397 struct wireless_dev *wdev; 1398 1399 mutex_lock(&cfg80211_mutex); 1400 list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 1401 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk))) 1402 continue; 1403 if (wp_idx < wp_start) { 1404 wp_idx++; 1405 continue; 1406 } 1407 if_idx = 0; 1408 1409 mutex_lock(&rdev->devlist_mtx); 1410 list_for_each_entry(wdev, &rdev->netdev_list, list) { 1411 if (if_idx < if_start) { 1412 if_idx++; 1413 continue; 1414 } 1415 if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid, 1416 cb->nlh->nlmsg_seq, NLM_F_MULTI, 1417 rdev, wdev->netdev) < 0) { 1418 mutex_unlock(&rdev->devlist_mtx); 1419 goto out; 1420 } 1421 if_idx++; 1422 } 1423 mutex_unlock(&rdev->devlist_mtx); 1424 1425 wp_idx++; 1426 } 1427 out: 1428 mutex_unlock(&cfg80211_mutex); 1429 1430 cb->args[0] = wp_idx; 1431 cb->args[1] = if_idx; 1432 1433 return skb->len; 1434 } 1435 1436 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info) 1437 { 1438 struct sk_buff *msg; 1439 struct cfg80211_registered_device *dev = info->user_ptr[0]; 1440 struct net_device *netdev = info->user_ptr[1]; 1441 1442 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 1443 if (!msg) 1444 return -ENOMEM; 1445 1446 if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0, 1447 dev, netdev) < 0) { 1448 nlmsg_free(msg); 1449 return -ENOBUFS; 1450 } 1451 1452 return genlmsg_reply(msg, info); 1453 } 1454 1455 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = { 1456 [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG }, 1457 [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG }, 1458 [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG }, 1459 [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG }, 1460 [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG }, 1461 }; 1462 1463 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags) 1464 { 1465 struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1]; 1466 int flag; 1467 1468 *mntrflags = 0; 1469 1470 if (!nla) 1471 return -EINVAL; 1472 1473 if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX, 1474 nla, mntr_flags_policy)) 1475 return -EINVAL; 1476 1477 for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++) 1478 if (flags[flag]) 1479 *mntrflags |= (1<<flag); 1480 1481 return 0; 1482 } 1483 1484 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev, 1485 struct net_device *netdev, u8 use_4addr, 1486 enum nl80211_iftype iftype) 1487 { 1488 if (!use_4addr) { 1489 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT)) 1490 return -EBUSY; 1491 return 0; 1492 } 1493 1494 switch (iftype) { 1495 case NL80211_IFTYPE_AP_VLAN: 1496 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP) 1497 return 0; 1498 break; 1499 case NL80211_IFTYPE_STATION: 1500 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION) 1501 return 0; 1502 break; 1503 default: 1504 break; 1505 } 1506 1507 return -EOPNOTSUPP; 1508 } 1509 1510 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info) 1511 { 1512 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 1513 struct vif_params params; 1514 int err; 1515 enum nl80211_iftype otype, ntype; 1516 struct net_device *dev = info->user_ptr[1]; 1517 u32 _flags, *flags = NULL; 1518 bool change = false; 1519 1520 memset(¶ms, 0, sizeof(params)); 1521 1522 otype = ntype = dev->ieee80211_ptr->iftype; 1523 1524 if (info->attrs[NL80211_ATTR_IFTYPE]) { 1525 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]); 1526 if (otype != ntype) 1527 change = true; 1528 if (ntype > NL80211_IFTYPE_MAX) 1529 return -EINVAL; 1530 } 1531 1532 if (info->attrs[NL80211_ATTR_MESH_ID]) { 1533 struct wireless_dev *wdev = dev->ieee80211_ptr; 1534 1535 if (ntype != NL80211_IFTYPE_MESH_POINT) 1536 return -EINVAL; 1537 if (netif_running(dev)) 1538 return -EBUSY; 1539 1540 wdev_lock(wdev); 1541 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN != 1542 IEEE80211_MAX_MESH_ID_LEN); 1543 wdev->mesh_id_up_len = 1544 nla_len(info->attrs[NL80211_ATTR_MESH_ID]); 1545 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]), 1546 wdev->mesh_id_up_len); 1547 wdev_unlock(wdev); 1548 } 1549 1550 if (info->attrs[NL80211_ATTR_4ADDR]) { 1551 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]); 1552 change = true; 1553 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype); 1554 if (err) 1555 return err; 1556 } else { 1557 params.use_4addr = -1; 1558 } 1559 1560 if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) { 1561 if (ntype != NL80211_IFTYPE_MONITOR) 1562 return -EINVAL; 1563 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS], 1564 &_flags); 1565 if (err) 1566 return err; 1567 1568 flags = &_flags; 1569 change = true; 1570 } 1571 1572 if (change) 1573 err = cfg80211_change_iface(rdev, dev, ntype, flags, ¶ms); 1574 else 1575 err = 0; 1576 1577 if (!err && params.use_4addr != -1) 1578 dev->ieee80211_ptr->use_4addr = params.use_4addr; 1579 1580 return err; 1581 } 1582 1583 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info) 1584 { 1585 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 1586 struct vif_params params; 1587 struct net_device *dev; 1588 int err; 1589 enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED; 1590 u32 flags; 1591 1592 memset(¶ms, 0, sizeof(params)); 1593 1594 if (!info->attrs[NL80211_ATTR_IFNAME]) 1595 return -EINVAL; 1596 1597 if (info->attrs[NL80211_ATTR_IFTYPE]) { 1598 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]); 1599 if (type > NL80211_IFTYPE_MAX) 1600 return -EINVAL; 1601 } 1602 1603 if (!rdev->ops->add_virtual_intf || 1604 !(rdev->wiphy.interface_modes & (1 << type))) 1605 return -EOPNOTSUPP; 1606 1607 if (info->attrs[NL80211_ATTR_4ADDR]) { 1608 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]); 1609 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type); 1610 if (err) 1611 return err; 1612 } 1613 1614 err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ? 1615 info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL, 1616 &flags); 1617 dev = rdev->ops->add_virtual_intf(&rdev->wiphy, 1618 nla_data(info->attrs[NL80211_ATTR_IFNAME]), 1619 type, err ? NULL : &flags, ¶ms); 1620 if (IS_ERR(dev)) 1621 return PTR_ERR(dev); 1622 1623 if (type == NL80211_IFTYPE_MESH_POINT && 1624 info->attrs[NL80211_ATTR_MESH_ID]) { 1625 struct wireless_dev *wdev = dev->ieee80211_ptr; 1626 1627 wdev_lock(wdev); 1628 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN != 1629 IEEE80211_MAX_MESH_ID_LEN); 1630 wdev->mesh_id_up_len = 1631 nla_len(info->attrs[NL80211_ATTR_MESH_ID]); 1632 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]), 1633 wdev->mesh_id_up_len); 1634 wdev_unlock(wdev); 1635 } 1636 1637 return 0; 1638 } 1639 1640 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info) 1641 { 1642 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 1643 struct net_device *dev = info->user_ptr[1]; 1644 1645 if (!rdev->ops->del_virtual_intf) 1646 return -EOPNOTSUPP; 1647 1648 return rdev->ops->del_virtual_intf(&rdev->wiphy, dev); 1649 } 1650 1651 struct get_key_cookie { 1652 struct sk_buff *msg; 1653 int error; 1654 int idx; 1655 }; 1656 1657 static void get_key_callback(void *c, struct key_params *params) 1658 { 1659 struct nlattr *key; 1660 struct get_key_cookie *cookie = c; 1661 1662 if (params->key) 1663 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_DATA, 1664 params->key_len, params->key); 1665 1666 if (params->seq) 1667 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_SEQ, 1668 params->seq_len, params->seq); 1669 1670 if (params->cipher) 1671 NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER, 1672 params->cipher); 1673 1674 key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY); 1675 if (!key) 1676 goto nla_put_failure; 1677 1678 if (params->key) 1679 NLA_PUT(cookie->msg, NL80211_KEY_DATA, 1680 params->key_len, params->key); 1681 1682 if (params->seq) 1683 NLA_PUT(cookie->msg, NL80211_KEY_SEQ, 1684 params->seq_len, params->seq); 1685 1686 if (params->cipher) 1687 NLA_PUT_U32(cookie->msg, NL80211_KEY_CIPHER, 1688 params->cipher); 1689 1690 NLA_PUT_U8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx); 1691 1692 nla_nest_end(cookie->msg, key); 1693 1694 return; 1695 nla_put_failure: 1696 cookie->error = 1; 1697 } 1698 1699 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info) 1700 { 1701 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 1702 int err; 1703 struct net_device *dev = info->user_ptr[1]; 1704 u8 key_idx = 0; 1705 const u8 *mac_addr = NULL; 1706 bool pairwise; 1707 struct get_key_cookie cookie = { 1708 .error = 0, 1709 }; 1710 void *hdr; 1711 struct sk_buff *msg; 1712 1713 if (info->attrs[NL80211_ATTR_KEY_IDX]) 1714 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]); 1715 1716 if (key_idx > 5) 1717 return -EINVAL; 1718 1719 if (info->attrs[NL80211_ATTR_MAC]) 1720 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]); 1721 1722 pairwise = !!mac_addr; 1723 if (info->attrs[NL80211_ATTR_KEY_TYPE]) { 1724 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]); 1725 if (kt >= NUM_NL80211_KEYTYPES) 1726 return -EINVAL; 1727 if (kt != NL80211_KEYTYPE_GROUP && 1728 kt != NL80211_KEYTYPE_PAIRWISE) 1729 return -EINVAL; 1730 pairwise = kt == NL80211_KEYTYPE_PAIRWISE; 1731 } 1732 1733 if (!rdev->ops->get_key) 1734 return -EOPNOTSUPP; 1735 1736 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 1737 if (!msg) 1738 return -ENOMEM; 1739 1740 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0, 1741 NL80211_CMD_NEW_KEY); 1742 if (IS_ERR(hdr)) 1743 return PTR_ERR(hdr); 1744 1745 cookie.msg = msg; 1746 cookie.idx = key_idx; 1747 1748 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex); 1749 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx); 1750 if (mac_addr) 1751 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr); 1752 1753 if (pairwise && mac_addr && 1754 !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN)) 1755 return -ENOENT; 1756 1757 err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, pairwise, 1758 mac_addr, &cookie, get_key_callback); 1759 1760 if (err) 1761 goto free_msg; 1762 1763 if (cookie.error) 1764 goto nla_put_failure; 1765 1766 genlmsg_end(msg, hdr); 1767 return genlmsg_reply(msg, info); 1768 1769 nla_put_failure: 1770 err = -ENOBUFS; 1771 free_msg: 1772 nlmsg_free(msg); 1773 return err; 1774 } 1775 1776 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info) 1777 { 1778 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 1779 struct key_parse key; 1780 int err; 1781 struct net_device *dev = info->user_ptr[1]; 1782 1783 err = nl80211_parse_key(info, &key); 1784 if (err) 1785 return err; 1786 1787 if (key.idx < 0) 1788 return -EINVAL; 1789 1790 /* only support setting default key */ 1791 if (!key.def && !key.defmgmt) 1792 return -EINVAL; 1793 1794 wdev_lock(dev->ieee80211_ptr); 1795 1796 if (key.def) { 1797 if (!rdev->ops->set_default_key) { 1798 err = -EOPNOTSUPP; 1799 goto out; 1800 } 1801 1802 err = nl80211_key_allowed(dev->ieee80211_ptr); 1803 if (err) 1804 goto out; 1805 1806 err = rdev->ops->set_default_key(&rdev->wiphy, dev, key.idx, 1807 key.def_uni, key.def_multi); 1808 1809 if (err) 1810 goto out; 1811 1812 #ifdef CONFIG_CFG80211_WEXT 1813 dev->ieee80211_ptr->wext.default_key = key.idx; 1814 #endif 1815 } else { 1816 if (key.def_uni || !key.def_multi) { 1817 err = -EINVAL; 1818 goto out; 1819 } 1820 1821 if (!rdev->ops->set_default_mgmt_key) { 1822 err = -EOPNOTSUPP; 1823 goto out; 1824 } 1825 1826 err = nl80211_key_allowed(dev->ieee80211_ptr); 1827 if (err) 1828 goto out; 1829 1830 err = rdev->ops->set_default_mgmt_key(&rdev->wiphy, 1831 dev, key.idx); 1832 if (err) 1833 goto out; 1834 1835 #ifdef CONFIG_CFG80211_WEXT 1836 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx; 1837 #endif 1838 } 1839 1840 out: 1841 wdev_unlock(dev->ieee80211_ptr); 1842 1843 return err; 1844 } 1845 1846 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info) 1847 { 1848 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 1849 int err; 1850 struct net_device *dev = info->user_ptr[1]; 1851 struct key_parse key; 1852 const u8 *mac_addr = NULL; 1853 1854 err = nl80211_parse_key(info, &key); 1855 if (err) 1856 return err; 1857 1858 if (!key.p.key) 1859 return -EINVAL; 1860 1861 if (info->attrs[NL80211_ATTR_MAC]) 1862 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]); 1863 1864 if (key.type == -1) { 1865 if (mac_addr) 1866 key.type = NL80211_KEYTYPE_PAIRWISE; 1867 else 1868 key.type = NL80211_KEYTYPE_GROUP; 1869 } 1870 1871 /* for now */ 1872 if (key.type != NL80211_KEYTYPE_PAIRWISE && 1873 key.type != NL80211_KEYTYPE_GROUP) 1874 return -EINVAL; 1875 1876 if (!rdev->ops->add_key) 1877 return -EOPNOTSUPP; 1878 1879 if (cfg80211_validate_key_settings(rdev, &key.p, key.idx, 1880 key.type == NL80211_KEYTYPE_PAIRWISE, 1881 mac_addr)) 1882 return -EINVAL; 1883 1884 wdev_lock(dev->ieee80211_ptr); 1885 err = nl80211_key_allowed(dev->ieee80211_ptr); 1886 if (!err) 1887 err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx, 1888 key.type == NL80211_KEYTYPE_PAIRWISE, 1889 mac_addr, &key.p); 1890 wdev_unlock(dev->ieee80211_ptr); 1891 1892 return err; 1893 } 1894 1895 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info) 1896 { 1897 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 1898 int err; 1899 struct net_device *dev = info->user_ptr[1]; 1900 u8 *mac_addr = NULL; 1901 struct key_parse key; 1902 1903 err = nl80211_parse_key(info, &key); 1904 if (err) 1905 return err; 1906 1907 if (info->attrs[NL80211_ATTR_MAC]) 1908 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]); 1909 1910 if (key.type == -1) { 1911 if (mac_addr) 1912 key.type = NL80211_KEYTYPE_PAIRWISE; 1913 else 1914 key.type = NL80211_KEYTYPE_GROUP; 1915 } 1916 1917 /* for now */ 1918 if (key.type != NL80211_KEYTYPE_PAIRWISE && 1919 key.type != NL80211_KEYTYPE_GROUP) 1920 return -EINVAL; 1921 1922 if (!rdev->ops->del_key) 1923 return -EOPNOTSUPP; 1924 1925 wdev_lock(dev->ieee80211_ptr); 1926 err = nl80211_key_allowed(dev->ieee80211_ptr); 1927 1928 if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr && 1929 !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN)) 1930 err = -ENOENT; 1931 1932 if (!err) 1933 err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx, 1934 key.type == NL80211_KEYTYPE_PAIRWISE, 1935 mac_addr); 1936 1937 #ifdef CONFIG_CFG80211_WEXT 1938 if (!err) { 1939 if (key.idx == dev->ieee80211_ptr->wext.default_key) 1940 dev->ieee80211_ptr->wext.default_key = -1; 1941 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key) 1942 dev->ieee80211_ptr->wext.default_mgmt_key = -1; 1943 } 1944 #endif 1945 wdev_unlock(dev->ieee80211_ptr); 1946 1947 return err; 1948 } 1949 1950 static int nl80211_addset_beacon(struct sk_buff *skb, struct genl_info *info) 1951 { 1952 int (*call)(struct wiphy *wiphy, struct net_device *dev, 1953 struct beacon_parameters *info); 1954 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 1955 struct net_device *dev = info->user_ptr[1]; 1956 struct wireless_dev *wdev = dev->ieee80211_ptr; 1957 struct beacon_parameters params; 1958 int haveinfo = 0, err; 1959 1960 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL])) 1961 return -EINVAL; 1962 1963 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP && 1964 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) 1965 return -EOPNOTSUPP; 1966 1967 memset(¶ms, 0, sizeof(params)); 1968 1969 switch (info->genlhdr->cmd) { 1970 case NL80211_CMD_NEW_BEACON: 1971 /* these are required for NEW_BEACON */ 1972 if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] || 1973 !info->attrs[NL80211_ATTR_DTIM_PERIOD] || 1974 !info->attrs[NL80211_ATTR_BEACON_HEAD]) 1975 return -EINVAL; 1976 1977 params.interval = 1978 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]); 1979 params.dtim_period = 1980 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]); 1981 1982 err = cfg80211_validate_beacon_int(rdev, params.interval); 1983 if (err) 1984 return err; 1985 1986 call = rdev->ops->add_beacon; 1987 break; 1988 case NL80211_CMD_SET_BEACON: 1989 call = rdev->ops->set_beacon; 1990 break; 1991 default: 1992 WARN_ON(1); 1993 return -EOPNOTSUPP; 1994 } 1995 1996 if (!call) 1997 return -EOPNOTSUPP; 1998 1999 if (info->attrs[NL80211_ATTR_BEACON_HEAD]) { 2000 params.head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]); 2001 params.head_len = 2002 nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]); 2003 haveinfo = 1; 2004 } 2005 2006 if (info->attrs[NL80211_ATTR_BEACON_TAIL]) { 2007 params.tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]); 2008 params.tail_len = 2009 nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]); 2010 haveinfo = 1; 2011 } 2012 2013 if (!haveinfo) 2014 return -EINVAL; 2015 2016 err = call(&rdev->wiphy, dev, ¶ms); 2017 if (!err && params.interval) 2018 wdev->beacon_interval = params.interval; 2019 return err; 2020 } 2021 2022 static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info) 2023 { 2024 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 2025 struct net_device *dev = info->user_ptr[1]; 2026 struct wireless_dev *wdev = dev->ieee80211_ptr; 2027 int err; 2028 2029 if (!rdev->ops->del_beacon) 2030 return -EOPNOTSUPP; 2031 2032 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP && 2033 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) 2034 return -EOPNOTSUPP; 2035 2036 err = rdev->ops->del_beacon(&rdev->wiphy, dev); 2037 if (!err) 2038 wdev->beacon_interval = 0; 2039 return err; 2040 } 2041 2042 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = { 2043 [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG }, 2044 [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG }, 2045 [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG }, 2046 [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG }, 2047 [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG }, 2048 }; 2049 2050 static int parse_station_flags(struct genl_info *info, 2051 struct station_parameters *params) 2052 { 2053 struct nlattr *flags[NL80211_STA_FLAG_MAX + 1]; 2054 struct nlattr *nla; 2055 int flag; 2056 2057 /* 2058 * Try parsing the new attribute first so userspace 2059 * can specify both for older kernels. 2060 */ 2061 nla = info->attrs[NL80211_ATTR_STA_FLAGS2]; 2062 if (nla) { 2063 struct nl80211_sta_flag_update *sta_flags; 2064 2065 sta_flags = nla_data(nla); 2066 params->sta_flags_mask = sta_flags->mask; 2067 params->sta_flags_set = sta_flags->set; 2068 if ((params->sta_flags_mask | 2069 params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID)) 2070 return -EINVAL; 2071 return 0; 2072 } 2073 2074 /* if present, parse the old attribute */ 2075 2076 nla = info->attrs[NL80211_ATTR_STA_FLAGS]; 2077 if (!nla) 2078 return 0; 2079 2080 if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX, 2081 nla, sta_flags_policy)) 2082 return -EINVAL; 2083 2084 params->sta_flags_mask = (1 << __NL80211_STA_FLAG_AFTER_LAST) - 1; 2085 params->sta_flags_mask &= ~1; 2086 2087 for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) 2088 if (flags[flag]) 2089 params->sta_flags_set |= (1<<flag); 2090 2091 return 0; 2092 } 2093 2094 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info, 2095 int attr) 2096 { 2097 struct nlattr *rate; 2098 u16 bitrate; 2099 2100 rate = nla_nest_start(msg, attr); 2101 if (!rate) 2102 goto nla_put_failure; 2103 2104 /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */ 2105 bitrate = cfg80211_calculate_bitrate(info); 2106 if (bitrate > 0) 2107 NLA_PUT_U16(msg, NL80211_RATE_INFO_BITRATE, bitrate); 2108 2109 if (info->flags & RATE_INFO_FLAGS_MCS) 2110 NLA_PUT_U8(msg, NL80211_RATE_INFO_MCS, info->mcs); 2111 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH) 2112 NLA_PUT_FLAG(msg, NL80211_RATE_INFO_40_MHZ_WIDTH); 2113 if (info->flags & RATE_INFO_FLAGS_SHORT_GI) 2114 NLA_PUT_FLAG(msg, NL80211_RATE_INFO_SHORT_GI); 2115 2116 nla_nest_end(msg, rate); 2117 return true; 2118 2119 nla_put_failure: 2120 return false; 2121 } 2122 2123 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq, 2124 int flags, struct net_device *dev, 2125 const u8 *mac_addr, struct station_info *sinfo) 2126 { 2127 void *hdr; 2128 struct nlattr *sinfoattr, *bss_param; 2129 2130 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION); 2131 if (!hdr) 2132 return -1; 2133 2134 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex); 2135 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr); 2136 2137 NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, sinfo->generation); 2138 2139 sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO); 2140 if (!sinfoattr) 2141 goto nla_put_failure; 2142 if (sinfo->filled & STATION_INFO_CONNECTED_TIME) 2143 NLA_PUT_U32(msg, NL80211_STA_INFO_CONNECTED_TIME, 2144 sinfo->connected_time); 2145 if (sinfo->filled & STATION_INFO_INACTIVE_TIME) 2146 NLA_PUT_U32(msg, NL80211_STA_INFO_INACTIVE_TIME, 2147 sinfo->inactive_time); 2148 if (sinfo->filled & STATION_INFO_RX_BYTES) 2149 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_BYTES, 2150 sinfo->rx_bytes); 2151 if (sinfo->filled & STATION_INFO_TX_BYTES) 2152 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_BYTES, 2153 sinfo->tx_bytes); 2154 if (sinfo->filled & STATION_INFO_LLID) 2155 NLA_PUT_U16(msg, NL80211_STA_INFO_LLID, 2156 sinfo->llid); 2157 if (sinfo->filled & STATION_INFO_PLID) 2158 NLA_PUT_U16(msg, NL80211_STA_INFO_PLID, 2159 sinfo->plid); 2160 if (sinfo->filled & STATION_INFO_PLINK_STATE) 2161 NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE, 2162 sinfo->plink_state); 2163 if (sinfo->filled & STATION_INFO_SIGNAL) 2164 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL, 2165 sinfo->signal); 2166 if (sinfo->filled & STATION_INFO_SIGNAL_AVG) 2167 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL_AVG, 2168 sinfo->signal_avg); 2169 if (sinfo->filled & STATION_INFO_TX_BITRATE) { 2170 if (!nl80211_put_sta_rate(msg, &sinfo->txrate, 2171 NL80211_STA_INFO_TX_BITRATE)) 2172 goto nla_put_failure; 2173 } 2174 if (sinfo->filled & STATION_INFO_RX_BITRATE) { 2175 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate, 2176 NL80211_STA_INFO_RX_BITRATE)) 2177 goto nla_put_failure; 2178 } 2179 if (sinfo->filled & STATION_INFO_RX_PACKETS) 2180 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_PACKETS, 2181 sinfo->rx_packets); 2182 if (sinfo->filled & STATION_INFO_TX_PACKETS) 2183 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_PACKETS, 2184 sinfo->tx_packets); 2185 if (sinfo->filled & STATION_INFO_TX_RETRIES) 2186 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_RETRIES, 2187 sinfo->tx_retries); 2188 if (sinfo->filled & STATION_INFO_TX_FAILED) 2189 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_FAILED, 2190 sinfo->tx_failed); 2191 if (sinfo->filled & STATION_INFO_BSS_PARAM) { 2192 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM); 2193 if (!bss_param) 2194 goto nla_put_failure; 2195 2196 if (sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) 2197 NLA_PUT_FLAG(msg, NL80211_STA_BSS_PARAM_CTS_PROT); 2198 if (sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) 2199 NLA_PUT_FLAG(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE); 2200 if (sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) 2201 NLA_PUT_FLAG(msg, 2202 NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME); 2203 NLA_PUT_U8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD, 2204 sinfo->bss_param.dtim_period); 2205 NLA_PUT_U16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL, 2206 sinfo->bss_param.beacon_interval); 2207 2208 nla_nest_end(msg, bss_param); 2209 } 2210 nla_nest_end(msg, sinfoattr); 2211 2212 return genlmsg_end(msg, hdr); 2213 2214 nla_put_failure: 2215 genlmsg_cancel(msg, hdr); 2216 return -EMSGSIZE; 2217 } 2218 2219 static int nl80211_dump_station(struct sk_buff *skb, 2220 struct netlink_callback *cb) 2221 { 2222 struct station_info sinfo; 2223 struct cfg80211_registered_device *dev; 2224 struct net_device *netdev; 2225 u8 mac_addr[ETH_ALEN]; 2226 int sta_idx = cb->args[1]; 2227 int err; 2228 2229 err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev); 2230 if (err) 2231 return err; 2232 2233 if (!dev->ops->dump_station) { 2234 err = -EOPNOTSUPP; 2235 goto out_err; 2236 } 2237 2238 while (1) { 2239 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx, 2240 mac_addr, &sinfo); 2241 if (err == -ENOENT) 2242 break; 2243 if (err) 2244 goto out_err; 2245 2246 if (nl80211_send_station(skb, 2247 NETLINK_CB(cb->skb).pid, 2248 cb->nlh->nlmsg_seq, NLM_F_MULTI, 2249 netdev, mac_addr, 2250 &sinfo) < 0) 2251 goto out; 2252 2253 sta_idx++; 2254 } 2255 2256 2257 out: 2258 cb->args[1] = sta_idx; 2259 err = skb->len; 2260 out_err: 2261 nl80211_finish_netdev_dump(dev); 2262 2263 return err; 2264 } 2265 2266 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info) 2267 { 2268 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 2269 struct net_device *dev = info->user_ptr[1]; 2270 struct station_info sinfo; 2271 struct sk_buff *msg; 2272 u8 *mac_addr = NULL; 2273 int err; 2274 2275 memset(&sinfo, 0, sizeof(sinfo)); 2276 2277 if (!info->attrs[NL80211_ATTR_MAC]) 2278 return -EINVAL; 2279 2280 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]); 2281 2282 if (!rdev->ops->get_station) 2283 return -EOPNOTSUPP; 2284 2285 err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo); 2286 if (err) 2287 return err; 2288 2289 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 2290 if (!msg) 2291 return -ENOMEM; 2292 2293 if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0, 2294 dev, mac_addr, &sinfo) < 0) { 2295 nlmsg_free(msg); 2296 return -ENOBUFS; 2297 } 2298 2299 return genlmsg_reply(msg, info); 2300 } 2301 2302 /* 2303 * Get vlan interface making sure it is running and on the right wiphy. 2304 */ 2305 static int get_vlan(struct genl_info *info, 2306 struct cfg80211_registered_device *rdev, 2307 struct net_device **vlan) 2308 { 2309 struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN]; 2310 *vlan = NULL; 2311 2312 if (vlanattr) { 2313 *vlan = dev_get_by_index(genl_info_net(info), 2314 nla_get_u32(vlanattr)); 2315 if (!*vlan) 2316 return -ENODEV; 2317 if (!(*vlan)->ieee80211_ptr) 2318 return -EINVAL; 2319 if ((*vlan)->ieee80211_ptr->wiphy != &rdev->wiphy) 2320 return -EINVAL; 2321 if (!netif_running(*vlan)) 2322 return -ENETDOWN; 2323 } 2324 return 0; 2325 } 2326 2327 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info) 2328 { 2329 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 2330 int err; 2331 struct net_device *dev = info->user_ptr[1]; 2332 struct station_parameters params; 2333 u8 *mac_addr = NULL; 2334 2335 memset(¶ms, 0, sizeof(params)); 2336 2337 params.listen_interval = -1; 2338 params.plink_state = -1; 2339 2340 if (info->attrs[NL80211_ATTR_STA_AID]) 2341 return -EINVAL; 2342 2343 if (!info->attrs[NL80211_ATTR_MAC]) 2344 return -EINVAL; 2345 2346 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]); 2347 2348 if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) { 2349 params.supported_rates = 2350 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]); 2351 params.supported_rates_len = 2352 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]); 2353 } 2354 2355 if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]) 2356 params.listen_interval = 2357 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]); 2358 2359 if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) 2360 params.ht_capa = 2361 nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]); 2362 2363 if (parse_station_flags(info, ¶ms)) 2364 return -EINVAL; 2365 2366 if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) 2367 params.plink_action = 2368 nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]); 2369 2370 if (info->attrs[NL80211_ATTR_STA_PLINK_STATE]) 2371 params.plink_state = 2372 nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]); 2373 2374 err = get_vlan(info, rdev, ¶ms.vlan); 2375 if (err) 2376 goto out; 2377 2378 /* validate settings */ 2379 err = 0; 2380 2381 switch (dev->ieee80211_ptr->iftype) { 2382 case NL80211_IFTYPE_AP: 2383 case NL80211_IFTYPE_AP_VLAN: 2384 case NL80211_IFTYPE_P2P_GO: 2385 /* disallow mesh-specific things */ 2386 if (params.plink_action) 2387 err = -EINVAL; 2388 break; 2389 case NL80211_IFTYPE_P2P_CLIENT: 2390 case NL80211_IFTYPE_STATION: 2391 /* disallow everything but AUTHORIZED flag */ 2392 if (params.plink_action) 2393 err = -EINVAL; 2394 if (params.vlan) 2395 err = -EINVAL; 2396 if (params.supported_rates) 2397 err = -EINVAL; 2398 if (params.ht_capa) 2399 err = -EINVAL; 2400 if (params.listen_interval >= 0) 2401 err = -EINVAL; 2402 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED)) 2403 err = -EINVAL; 2404 break; 2405 case NL80211_IFTYPE_MESH_POINT: 2406 /* disallow things mesh doesn't support */ 2407 if (params.vlan) 2408 err = -EINVAL; 2409 if (params.ht_capa) 2410 err = -EINVAL; 2411 if (params.listen_interval >= 0) 2412 err = -EINVAL; 2413 if (params.sta_flags_mask & 2414 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) | 2415 BIT(NL80211_STA_FLAG_MFP) | 2416 BIT(NL80211_STA_FLAG_AUTHORIZED))) 2417 err = -EINVAL; 2418 break; 2419 default: 2420 err = -EINVAL; 2421 } 2422 2423 if (err) 2424 goto out; 2425 2426 if (!rdev->ops->change_station) { 2427 err = -EOPNOTSUPP; 2428 goto out; 2429 } 2430 2431 err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, ¶ms); 2432 2433 out: 2434 if (params.vlan) 2435 dev_put(params.vlan); 2436 2437 return err; 2438 } 2439 2440 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info) 2441 { 2442 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 2443 int err; 2444 struct net_device *dev = info->user_ptr[1]; 2445 struct station_parameters params; 2446 u8 *mac_addr = NULL; 2447 2448 memset(¶ms, 0, sizeof(params)); 2449 2450 if (!info->attrs[NL80211_ATTR_MAC]) 2451 return -EINVAL; 2452 2453 if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]) 2454 return -EINVAL; 2455 2456 if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) 2457 return -EINVAL; 2458 2459 if (!info->attrs[NL80211_ATTR_STA_AID]) 2460 return -EINVAL; 2461 2462 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]); 2463 params.supported_rates = 2464 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]); 2465 params.supported_rates_len = 2466 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]); 2467 params.listen_interval = 2468 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]); 2469 2470 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]); 2471 if (!params.aid || params.aid > IEEE80211_MAX_AID) 2472 return -EINVAL; 2473 2474 if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) 2475 params.ht_capa = 2476 nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]); 2477 2478 if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) 2479 params.plink_action = 2480 nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]); 2481 2482 if (parse_station_flags(info, ¶ms)) 2483 return -EINVAL; 2484 2485 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP && 2486 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN && 2487 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT && 2488 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) 2489 return -EINVAL; 2490 2491 err = get_vlan(info, rdev, ¶ms.vlan); 2492 if (err) 2493 goto out; 2494 2495 /* validate settings */ 2496 err = 0; 2497 2498 if (!rdev->ops->add_station) { 2499 err = -EOPNOTSUPP; 2500 goto out; 2501 } 2502 2503 err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, ¶ms); 2504 2505 out: 2506 if (params.vlan) 2507 dev_put(params.vlan); 2508 return err; 2509 } 2510 2511 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info) 2512 { 2513 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 2514 struct net_device *dev = info->user_ptr[1]; 2515 u8 *mac_addr = NULL; 2516 2517 if (info->attrs[NL80211_ATTR_MAC]) 2518 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]); 2519 2520 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP && 2521 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN && 2522 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT && 2523 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) 2524 return -EINVAL; 2525 2526 if (!rdev->ops->del_station) 2527 return -EOPNOTSUPP; 2528 2529 return rdev->ops->del_station(&rdev->wiphy, dev, mac_addr); 2530 } 2531 2532 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq, 2533 int flags, struct net_device *dev, 2534 u8 *dst, u8 *next_hop, 2535 struct mpath_info *pinfo) 2536 { 2537 void *hdr; 2538 struct nlattr *pinfoattr; 2539 2540 hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION); 2541 if (!hdr) 2542 return -1; 2543 2544 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex); 2545 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst); 2546 NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop); 2547 2548 NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, pinfo->generation); 2549 2550 pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO); 2551 if (!pinfoattr) 2552 goto nla_put_failure; 2553 if (pinfo->filled & MPATH_INFO_FRAME_QLEN) 2554 NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN, 2555 pinfo->frame_qlen); 2556 if (pinfo->filled & MPATH_INFO_SN) 2557 NLA_PUT_U32(msg, NL80211_MPATH_INFO_SN, 2558 pinfo->sn); 2559 if (pinfo->filled & MPATH_INFO_METRIC) 2560 NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC, 2561 pinfo->metric); 2562 if (pinfo->filled & MPATH_INFO_EXPTIME) 2563 NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME, 2564 pinfo->exptime); 2565 if (pinfo->filled & MPATH_INFO_FLAGS) 2566 NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS, 2567 pinfo->flags); 2568 if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) 2569 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT, 2570 pinfo->discovery_timeout); 2571 if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) 2572 NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES, 2573 pinfo->discovery_retries); 2574 2575 nla_nest_end(msg, pinfoattr); 2576 2577 return genlmsg_end(msg, hdr); 2578 2579 nla_put_failure: 2580 genlmsg_cancel(msg, hdr); 2581 return -EMSGSIZE; 2582 } 2583 2584 static int nl80211_dump_mpath(struct sk_buff *skb, 2585 struct netlink_callback *cb) 2586 { 2587 struct mpath_info pinfo; 2588 struct cfg80211_registered_device *dev; 2589 struct net_device *netdev; 2590 u8 dst[ETH_ALEN]; 2591 u8 next_hop[ETH_ALEN]; 2592 int path_idx = cb->args[1]; 2593 int err; 2594 2595 err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev); 2596 if (err) 2597 return err; 2598 2599 if (!dev->ops->dump_mpath) { 2600 err = -EOPNOTSUPP; 2601 goto out_err; 2602 } 2603 2604 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) { 2605 err = -EOPNOTSUPP; 2606 goto out_err; 2607 } 2608 2609 while (1) { 2610 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx, 2611 dst, next_hop, &pinfo); 2612 if (err == -ENOENT) 2613 break; 2614 if (err) 2615 goto out_err; 2616 2617 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid, 2618 cb->nlh->nlmsg_seq, NLM_F_MULTI, 2619 netdev, dst, next_hop, 2620 &pinfo) < 0) 2621 goto out; 2622 2623 path_idx++; 2624 } 2625 2626 2627 out: 2628 cb->args[1] = path_idx; 2629 err = skb->len; 2630 out_err: 2631 nl80211_finish_netdev_dump(dev); 2632 return err; 2633 } 2634 2635 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info) 2636 { 2637 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 2638 int err; 2639 struct net_device *dev = info->user_ptr[1]; 2640 struct mpath_info pinfo; 2641 struct sk_buff *msg; 2642 u8 *dst = NULL; 2643 u8 next_hop[ETH_ALEN]; 2644 2645 memset(&pinfo, 0, sizeof(pinfo)); 2646 2647 if (!info->attrs[NL80211_ATTR_MAC]) 2648 return -EINVAL; 2649 2650 dst = nla_data(info->attrs[NL80211_ATTR_MAC]); 2651 2652 if (!rdev->ops->get_mpath) 2653 return -EOPNOTSUPP; 2654 2655 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) 2656 return -EOPNOTSUPP; 2657 2658 err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo); 2659 if (err) 2660 return err; 2661 2662 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 2663 if (!msg) 2664 return -ENOMEM; 2665 2666 if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0, 2667 dev, dst, next_hop, &pinfo) < 0) { 2668 nlmsg_free(msg); 2669 return -ENOBUFS; 2670 } 2671 2672 return genlmsg_reply(msg, info); 2673 } 2674 2675 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info) 2676 { 2677 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 2678 struct net_device *dev = info->user_ptr[1]; 2679 u8 *dst = NULL; 2680 u8 *next_hop = NULL; 2681 2682 if (!info->attrs[NL80211_ATTR_MAC]) 2683 return -EINVAL; 2684 2685 if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]) 2686 return -EINVAL; 2687 2688 dst = nla_data(info->attrs[NL80211_ATTR_MAC]); 2689 next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]); 2690 2691 if (!rdev->ops->change_mpath) 2692 return -EOPNOTSUPP; 2693 2694 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) 2695 return -EOPNOTSUPP; 2696 2697 return rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop); 2698 } 2699 2700 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info) 2701 { 2702 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 2703 struct net_device *dev = info->user_ptr[1]; 2704 u8 *dst = NULL; 2705 u8 *next_hop = NULL; 2706 2707 if (!info->attrs[NL80211_ATTR_MAC]) 2708 return -EINVAL; 2709 2710 if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]) 2711 return -EINVAL; 2712 2713 dst = nla_data(info->attrs[NL80211_ATTR_MAC]); 2714 next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]); 2715 2716 if (!rdev->ops->add_mpath) 2717 return -EOPNOTSUPP; 2718 2719 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) 2720 return -EOPNOTSUPP; 2721 2722 return rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop); 2723 } 2724 2725 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info) 2726 { 2727 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 2728 struct net_device *dev = info->user_ptr[1]; 2729 u8 *dst = NULL; 2730 2731 if (info->attrs[NL80211_ATTR_MAC]) 2732 dst = nla_data(info->attrs[NL80211_ATTR_MAC]); 2733 2734 if (!rdev->ops->del_mpath) 2735 return -EOPNOTSUPP; 2736 2737 return rdev->ops->del_mpath(&rdev->wiphy, dev, dst); 2738 } 2739 2740 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info) 2741 { 2742 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 2743 struct net_device *dev = info->user_ptr[1]; 2744 struct bss_parameters params; 2745 2746 memset(¶ms, 0, sizeof(params)); 2747 /* default to not changing parameters */ 2748 params.use_cts_prot = -1; 2749 params.use_short_preamble = -1; 2750 params.use_short_slot_time = -1; 2751 params.ap_isolate = -1; 2752 params.ht_opmode = -1; 2753 2754 if (info->attrs[NL80211_ATTR_BSS_CTS_PROT]) 2755 params.use_cts_prot = 2756 nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]); 2757 if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]) 2758 params.use_short_preamble = 2759 nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]); 2760 if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]) 2761 params.use_short_slot_time = 2762 nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]); 2763 if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) { 2764 params.basic_rates = 2765 nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]); 2766 params.basic_rates_len = 2767 nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]); 2768 } 2769 if (info->attrs[NL80211_ATTR_AP_ISOLATE]) 2770 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]); 2771 if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE]) 2772 params.ht_opmode = 2773 nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]); 2774 2775 if (!rdev->ops->change_bss) 2776 return -EOPNOTSUPP; 2777 2778 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP && 2779 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) 2780 return -EOPNOTSUPP; 2781 2782 return rdev->ops->change_bss(&rdev->wiphy, dev, ¶ms); 2783 } 2784 2785 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = { 2786 [NL80211_ATTR_REG_RULE_FLAGS] = { .type = NLA_U32 }, 2787 [NL80211_ATTR_FREQ_RANGE_START] = { .type = NLA_U32 }, 2788 [NL80211_ATTR_FREQ_RANGE_END] = { .type = NLA_U32 }, 2789 [NL80211_ATTR_FREQ_RANGE_MAX_BW] = { .type = NLA_U32 }, 2790 [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN] = { .type = NLA_U32 }, 2791 [NL80211_ATTR_POWER_RULE_MAX_EIRP] = { .type = NLA_U32 }, 2792 }; 2793 2794 static int parse_reg_rule(struct nlattr *tb[], 2795 struct ieee80211_reg_rule *reg_rule) 2796 { 2797 struct ieee80211_freq_range *freq_range = ®_rule->freq_range; 2798 struct ieee80211_power_rule *power_rule = ®_rule->power_rule; 2799 2800 if (!tb[NL80211_ATTR_REG_RULE_FLAGS]) 2801 return -EINVAL; 2802 if (!tb[NL80211_ATTR_FREQ_RANGE_START]) 2803 return -EINVAL; 2804 if (!tb[NL80211_ATTR_FREQ_RANGE_END]) 2805 return -EINVAL; 2806 if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]) 2807 return -EINVAL; 2808 if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]) 2809 return -EINVAL; 2810 2811 reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]); 2812 2813 freq_range->start_freq_khz = 2814 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]); 2815 freq_range->end_freq_khz = 2816 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]); 2817 freq_range->max_bandwidth_khz = 2818 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]); 2819 2820 power_rule->max_eirp = 2821 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]); 2822 2823 if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]) 2824 power_rule->max_antenna_gain = 2825 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]); 2826 2827 return 0; 2828 } 2829 2830 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info) 2831 { 2832 int r; 2833 char *data = NULL; 2834 2835 /* 2836 * You should only get this when cfg80211 hasn't yet initialized 2837 * completely when built-in to the kernel right between the time 2838 * window between nl80211_init() and regulatory_init(), if that is 2839 * even possible. 2840 */ 2841 mutex_lock(&cfg80211_mutex); 2842 if (unlikely(!cfg80211_regdomain)) { 2843 mutex_unlock(&cfg80211_mutex); 2844 return -EINPROGRESS; 2845 } 2846 mutex_unlock(&cfg80211_mutex); 2847 2848 if (!info->attrs[NL80211_ATTR_REG_ALPHA2]) 2849 return -EINVAL; 2850 2851 data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]); 2852 2853 r = regulatory_hint_user(data); 2854 2855 return r; 2856 } 2857 2858 static int nl80211_get_mesh_config(struct sk_buff *skb, 2859 struct genl_info *info) 2860 { 2861 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 2862 struct net_device *dev = info->user_ptr[1]; 2863 struct wireless_dev *wdev = dev->ieee80211_ptr; 2864 struct mesh_config cur_params; 2865 int err = 0; 2866 void *hdr; 2867 struct nlattr *pinfoattr; 2868 struct sk_buff *msg; 2869 2870 if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) 2871 return -EOPNOTSUPP; 2872 2873 if (!rdev->ops->get_mesh_config) 2874 return -EOPNOTSUPP; 2875 2876 wdev_lock(wdev); 2877 /* If not connected, get default parameters */ 2878 if (!wdev->mesh_id_len) 2879 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params)); 2880 else 2881 err = rdev->ops->get_mesh_config(&rdev->wiphy, dev, 2882 &cur_params); 2883 wdev_unlock(wdev); 2884 2885 if (err) 2886 return err; 2887 2888 /* Draw up a netlink message to send back */ 2889 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 2890 if (!msg) 2891 return -ENOMEM; 2892 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0, 2893 NL80211_CMD_GET_MESH_CONFIG); 2894 if (!hdr) 2895 goto out; 2896 pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG); 2897 if (!pinfoattr) 2898 goto nla_put_failure; 2899 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex); 2900 NLA_PUT_U16(msg, NL80211_MESHCONF_RETRY_TIMEOUT, 2901 cur_params.dot11MeshRetryTimeout); 2902 NLA_PUT_U16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT, 2903 cur_params.dot11MeshConfirmTimeout); 2904 NLA_PUT_U16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT, 2905 cur_params.dot11MeshHoldingTimeout); 2906 NLA_PUT_U16(msg, NL80211_MESHCONF_MAX_PEER_LINKS, 2907 cur_params.dot11MeshMaxPeerLinks); 2908 NLA_PUT_U8(msg, NL80211_MESHCONF_MAX_RETRIES, 2909 cur_params.dot11MeshMaxRetries); 2910 NLA_PUT_U8(msg, NL80211_MESHCONF_TTL, 2911 cur_params.dot11MeshTTL); 2912 NLA_PUT_U8(msg, NL80211_MESHCONF_ELEMENT_TTL, 2913 cur_params.element_ttl); 2914 NLA_PUT_U8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS, 2915 cur_params.auto_open_plinks); 2916 NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES, 2917 cur_params.dot11MeshHWMPmaxPREQretries); 2918 NLA_PUT_U32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME, 2919 cur_params.path_refresh_time); 2920 NLA_PUT_U16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT, 2921 cur_params.min_discovery_timeout); 2922 NLA_PUT_U32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT, 2923 cur_params.dot11MeshHWMPactivePathTimeout); 2924 NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL, 2925 cur_params.dot11MeshHWMPpreqMinInterval); 2926 NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME, 2927 cur_params.dot11MeshHWMPnetDiameterTraversalTime); 2928 NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_ROOTMODE, 2929 cur_params.dot11MeshHWMPRootMode); 2930 nla_nest_end(msg, pinfoattr); 2931 genlmsg_end(msg, hdr); 2932 return genlmsg_reply(msg, info); 2933 2934 nla_put_failure: 2935 genlmsg_cancel(msg, hdr); 2936 out: 2937 nlmsg_free(msg); 2938 return -ENOBUFS; 2939 } 2940 2941 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = { 2942 [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 }, 2943 [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 }, 2944 [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 }, 2945 [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 }, 2946 [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 }, 2947 [NL80211_MESHCONF_TTL] = { .type = NLA_U8 }, 2948 [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 }, 2949 [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 }, 2950 2951 [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 }, 2952 [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 }, 2953 [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 }, 2954 [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 }, 2955 [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 }, 2956 [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 }, 2957 }; 2958 2959 static const struct nla_policy 2960 nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = { 2961 [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 }, 2962 [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 }, 2963 [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG }, 2964 [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY, 2965 .len = IEEE80211_MAX_DATA_LEN }, 2966 [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG }, 2967 }; 2968 2969 static int nl80211_parse_mesh_config(struct genl_info *info, 2970 struct mesh_config *cfg, 2971 u32 *mask_out) 2972 { 2973 struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1]; 2974 u32 mask = 0; 2975 2976 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \ 2977 do {\ 2978 if (table[attr_num]) {\ 2979 cfg->param = nla_fn(table[attr_num]); \ 2980 mask |= (1 << (attr_num - 1)); \ 2981 } \ 2982 } while (0);\ 2983 2984 2985 if (!info->attrs[NL80211_ATTR_MESH_CONFIG]) 2986 return -EINVAL; 2987 if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX, 2988 info->attrs[NL80211_ATTR_MESH_CONFIG], 2989 nl80211_meshconf_params_policy)) 2990 return -EINVAL; 2991 2992 /* This makes sure that there aren't more than 32 mesh config 2993 * parameters (otherwise our bitfield scheme would not work.) */ 2994 BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32); 2995 2996 /* Fill in the params struct */ 2997 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout, 2998 mask, NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16); 2999 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout, 3000 mask, NL80211_MESHCONF_CONFIRM_TIMEOUT, nla_get_u16); 3001 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout, 3002 mask, NL80211_MESHCONF_HOLDING_TIMEOUT, nla_get_u16); 3003 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks, 3004 mask, NL80211_MESHCONF_MAX_PEER_LINKS, nla_get_u16); 3005 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries, 3006 mask, NL80211_MESHCONF_MAX_RETRIES, nla_get_u8); 3007 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL, 3008 mask, NL80211_MESHCONF_TTL, nla_get_u8); 3009 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl, 3010 mask, NL80211_MESHCONF_ELEMENT_TTL, nla_get_u8); 3011 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks, 3012 mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, nla_get_u8); 3013 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries, 3014 mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES, 3015 nla_get_u8); 3016 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time, 3017 mask, NL80211_MESHCONF_PATH_REFRESH_TIME, nla_get_u32); 3018 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout, 3019 mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT, 3020 nla_get_u16); 3021 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout, 3022 mask, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT, 3023 nla_get_u32); 3024 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval, 3025 mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL, 3026 nla_get_u16); 3027 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, 3028 dot11MeshHWMPnetDiameterTraversalTime, 3029 mask, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME, 3030 nla_get_u16); 3031 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, 3032 dot11MeshHWMPRootMode, mask, 3033 NL80211_MESHCONF_HWMP_ROOTMODE, 3034 nla_get_u8); 3035 if (mask_out) 3036 *mask_out = mask; 3037 3038 return 0; 3039 3040 #undef FILL_IN_MESH_PARAM_IF_SET 3041 } 3042 3043 static int nl80211_parse_mesh_setup(struct genl_info *info, 3044 struct mesh_setup *setup) 3045 { 3046 struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1]; 3047 3048 if (!info->attrs[NL80211_ATTR_MESH_SETUP]) 3049 return -EINVAL; 3050 if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX, 3051 info->attrs[NL80211_ATTR_MESH_SETUP], 3052 nl80211_mesh_setup_params_policy)) 3053 return -EINVAL; 3054 3055 if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL]) 3056 setup->path_sel_proto = 3057 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ? 3058 IEEE80211_PATH_PROTOCOL_VENDOR : 3059 IEEE80211_PATH_PROTOCOL_HWMP; 3060 3061 if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC]) 3062 setup->path_metric = 3063 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ? 3064 IEEE80211_PATH_METRIC_VENDOR : 3065 IEEE80211_PATH_METRIC_AIRTIME; 3066 3067 3068 if (tb[NL80211_MESH_SETUP_IE]) { 3069 struct nlattr *ieattr = 3070 tb[NL80211_MESH_SETUP_IE]; 3071 if (!is_valid_ie_attr(ieattr)) 3072 return -EINVAL; 3073 setup->ie = nla_data(ieattr); 3074 setup->ie_len = nla_len(ieattr); 3075 } 3076 setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]); 3077 setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]); 3078 3079 return 0; 3080 } 3081 3082 static int nl80211_update_mesh_config(struct sk_buff *skb, 3083 struct genl_info *info) 3084 { 3085 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 3086 struct net_device *dev = info->user_ptr[1]; 3087 struct wireless_dev *wdev = dev->ieee80211_ptr; 3088 struct mesh_config cfg; 3089 u32 mask; 3090 int err; 3091 3092 if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) 3093 return -EOPNOTSUPP; 3094 3095 if (!rdev->ops->update_mesh_config) 3096 return -EOPNOTSUPP; 3097 3098 err = nl80211_parse_mesh_config(info, &cfg, &mask); 3099 if (err) 3100 return err; 3101 3102 wdev_lock(wdev); 3103 if (!wdev->mesh_id_len) 3104 err = -ENOLINK; 3105 3106 if (!err) 3107 err = rdev->ops->update_mesh_config(&rdev->wiphy, dev, 3108 mask, &cfg); 3109 3110 wdev_unlock(wdev); 3111 3112 return err; 3113 } 3114 3115 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info) 3116 { 3117 struct sk_buff *msg; 3118 void *hdr = NULL; 3119 struct nlattr *nl_reg_rules; 3120 unsigned int i; 3121 int err = -EINVAL; 3122 3123 mutex_lock(&cfg80211_mutex); 3124 3125 if (!cfg80211_regdomain) 3126 goto out; 3127 3128 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 3129 if (!msg) { 3130 err = -ENOBUFS; 3131 goto out; 3132 } 3133 3134 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0, 3135 NL80211_CMD_GET_REG); 3136 if (!hdr) 3137 goto put_failure; 3138 3139 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, 3140 cfg80211_regdomain->alpha2); 3141 3142 nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES); 3143 if (!nl_reg_rules) 3144 goto nla_put_failure; 3145 3146 for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) { 3147 struct nlattr *nl_reg_rule; 3148 const struct ieee80211_reg_rule *reg_rule; 3149 const struct ieee80211_freq_range *freq_range; 3150 const struct ieee80211_power_rule *power_rule; 3151 3152 reg_rule = &cfg80211_regdomain->reg_rules[i]; 3153 freq_range = ®_rule->freq_range; 3154 power_rule = ®_rule->power_rule; 3155 3156 nl_reg_rule = nla_nest_start(msg, i); 3157 if (!nl_reg_rule) 3158 goto nla_put_failure; 3159 3160 NLA_PUT_U32(msg, NL80211_ATTR_REG_RULE_FLAGS, 3161 reg_rule->flags); 3162 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_START, 3163 freq_range->start_freq_khz); 3164 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_END, 3165 freq_range->end_freq_khz); 3166 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW, 3167 freq_range->max_bandwidth_khz); 3168 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN, 3169 power_rule->max_antenna_gain); 3170 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP, 3171 power_rule->max_eirp); 3172 3173 nla_nest_end(msg, nl_reg_rule); 3174 } 3175 3176 nla_nest_end(msg, nl_reg_rules); 3177 3178 genlmsg_end(msg, hdr); 3179 err = genlmsg_reply(msg, info); 3180 goto out; 3181 3182 nla_put_failure: 3183 genlmsg_cancel(msg, hdr); 3184 put_failure: 3185 nlmsg_free(msg); 3186 err = -EMSGSIZE; 3187 out: 3188 mutex_unlock(&cfg80211_mutex); 3189 return err; 3190 } 3191 3192 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info) 3193 { 3194 struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1]; 3195 struct nlattr *nl_reg_rule; 3196 char *alpha2 = NULL; 3197 int rem_reg_rules = 0, r = 0; 3198 u32 num_rules = 0, rule_idx = 0, size_of_regd; 3199 struct ieee80211_regdomain *rd = NULL; 3200 3201 if (!info->attrs[NL80211_ATTR_REG_ALPHA2]) 3202 return -EINVAL; 3203 3204 if (!info->attrs[NL80211_ATTR_REG_RULES]) 3205 return -EINVAL; 3206 3207 alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]); 3208 3209 nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES], 3210 rem_reg_rules) { 3211 num_rules++; 3212 if (num_rules > NL80211_MAX_SUPP_REG_RULES) 3213 return -EINVAL; 3214 } 3215 3216 mutex_lock(&cfg80211_mutex); 3217 3218 if (!reg_is_valid_request(alpha2)) { 3219 r = -EINVAL; 3220 goto bad_reg; 3221 } 3222 3223 size_of_regd = sizeof(struct ieee80211_regdomain) + 3224 (num_rules * sizeof(struct ieee80211_reg_rule)); 3225 3226 rd = kzalloc(size_of_regd, GFP_KERNEL); 3227 if (!rd) { 3228 r = -ENOMEM; 3229 goto bad_reg; 3230 } 3231 3232 rd->n_reg_rules = num_rules; 3233 rd->alpha2[0] = alpha2[0]; 3234 rd->alpha2[1] = alpha2[1]; 3235 3236 nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES], 3237 rem_reg_rules) { 3238 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX, 3239 nla_data(nl_reg_rule), nla_len(nl_reg_rule), 3240 reg_rule_policy); 3241 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]); 3242 if (r) 3243 goto bad_reg; 3244 3245 rule_idx++; 3246 3247 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) { 3248 r = -EINVAL; 3249 goto bad_reg; 3250 } 3251 } 3252 3253 BUG_ON(rule_idx != num_rules); 3254 3255 r = set_regdom(rd); 3256 3257 mutex_unlock(&cfg80211_mutex); 3258 3259 return r; 3260 3261 bad_reg: 3262 mutex_unlock(&cfg80211_mutex); 3263 kfree(rd); 3264 return r; 3265 } 3266 3267 static int validate_scan_freqs(struct nlattr *freqs) 3268 { 3269 struct nlattr *attr1, *attr2; 3270 int n_channels = 0, tmp1, tmp2; 3271 3272 nla_for_each_nested(attr1, freqs, tmp1) { 3273 n_channels++; 3274 /* 3275 * Some hardware has a limited channel list for 3276 * scanning, and it is pretty much nonsensical 3277 * to scan for a channel twice, so disallow that 3278 * and don't require drivers to check that the 3279 * channel list they get isn't longer than what 3280 * they can scan, as long as they can scan all 3281 * the channels they registered at once. 3282 */ 3283 nla_for_each_nested(attr2, freqs, tmp2) 3284 if (attr1 != attr2 && 3285 nla_get_u32(attr1) == nla_get_u32(attr2)) 3286 return 0; 3287 } 3288 3289 return n_channels; 3290 } 3291 3292 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info) 3293 { 3294 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 3295 struct net_device *dev = info->user_ptr[1]; 3296 struct cfg80211_scan_request *request; 3297 struct cfg80211_ssid *ssid; 3298 struct ieee80211_channel *channel; 3299 struct nlattr *attr; 3300 struct wiphy *wiphy; 3301 int err, tmp, n_ssids = 0, n_channels, i; 3302 enum ieee80211_band band; 3303 size_t ie_len; 3304 3305 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE])) 3306 return -EINVAL; 3307 3308 wiphy = &rdev->wiphy; 3309 3310 if (!rdev->ops->scan) 3311 return -EOPNOTSUPP; 3312 3313 if (rdev->scan_req) 3314 return -EBUSY; 3315 3316 if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) { 3317 n_channels = validate_scan_freqs( 3318 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]); 3319 if (!n_channels) 3320 return -EINVAL; 3321 } else { 3322 n_channels = 0; 3323 3324 for (band = 0; band < IEEE80211_NUM_BANDS; band++) 3325 if (wiphy->bands[band]) 3326 n_channels += wiphy->bands[band]->n_channels; 3327 } 3328 3329 if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) 3330 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) 3331 n_ssids++; 3332 3333 if (n_ssids > wiphy->max_scan_ssids) 3334 return -EINVAL; 3335 3336 if (info->attrs[NL80211_ATTR_IE]) 3337 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]); 3338 else 3339 ie_len = 0; 3340 3341 if (ie_len > wiphy->max_scan_ie_len) 3342 return -EINVAL; 3343 3344 request = kzalloc(sizeof(*request) 3345 + sizeof(*ssid) * n_ssids 3346 + sizeof(channel) * n_channels 3347 + ie_len, GFP_KERNEL); 3348 if (!request) 3349 return -ENOMEM; 3350 3351 if (n_ssids) 3352 request->ssids = (void *)&request->channels[n_channels]; 3353 request->n_ssids = n_ssids; 3354 if (ie_len) { 3355 if (request->ssids) 3356 request->ie = (void *)(request->ssids + n_ssids); 3357 else 3358 request->ie = (void *)(request->channels + n_channels); 3359 } 3360 3361 i = 0; 3362 if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) { 3363 /* user specified, bail out if channel not found */ 3364 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) { 3365 struct ieee80211_channel *chan; 3366 3367 chan = ieee80211_get_channel(wiphy, nla_get_u32(attr)); 3368 3369 if (!chan) { 3370 err = -EINVAL; 3371 goto out_free; 3372 } 3373 3374 /* ignore disabled channels */ 3375 if (chan->flags & IEEE80211_CHAN_DISABLED) 3376 continue; 3377 3378 request->channels[i] = chan; 3379 i++; 3380 } 3381 } else { 3382 /* all channels */ 3383 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 3384 int j; 3385 if (!wiphy->bands[band]) 3386 continue; 3387 for (j = 0; j < wiphy->bands[band]->n_channels; j++) { 3388 struct ieee80211_channel *chan; 3389 3390 chan = &wiphy->bands[band]->channels[j]; 3391 3392 if (chan->flags & IEEE80211_CHAN_DISABLED) 3393 continue; 3394 3395 request->channels[i] = chan; 3396 i++; 3397 } 3398 } 3399 } 3400 3401 if (!i) { 3402 err = -EINVAL; 3403 goto out_free; 3404 } 3405 3406 request->n_channels = i; 3407 3408 i = 0; 3409 if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) { 3410 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) { 3411 if (request->ssids[i].ssid_len > IEEE80211_MAX_SSID_LEN) { 3412 err = -EINVAL; 3413 goto out_free; 3414 } 3415 memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr)); 3416 request->ssids[i].ssid_len = nla_len(attr); 3417 i++; 3418 } 3419 } 3420 3421 if (info->attrs[NL80211_ATTR_IE]) { 3422 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]); 3423 memcpy((void *)request->ie, 3424 nla_data(info->attrs[NL80211_ATTR_IE]), 3425 request->ie_len); 3426 } 3427 3428 request->dev = dev; 3429 request->wiphy = &rdev->wiphy; 3430 3431 rdev->scan_req = request; 3432 err = rdev->ops->scan(&rdev->wiphy, dev, request); 3433 3434 if (!err) { 3435 nl80211_send_scan_start(rdev, dev); 3436 dev_hold(dev); 3437 } else { 3438 out_free: 3439 rdev->scan_req = NULL; 3440 kfree(request); 3441 } 3442 3443 return err; 3444 } 3445 3446 static int nl80211_start_sched_scan(struct sk_buff *skb, 3447 struct genl_info *info) 3448 { 3449 struct cfg80211_sched_scan_request *request; 3450 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 3451 struct net_device *dev = info->user_ptr[1]; 3452 struct cfg80211_ssid *ssid; 3453 struct ieee80211_channel *channel; 3454 struct nlattr *attr; 3455 struct wiphy *wiphy; 3456 int err, tmp, n_ssids = 0, n_channels, i; 3457 u32 interval; 3458 enum ieee80211_band band; 3459 size_t ie_len; 3460 3461 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) || 3462 !rdev->ops->sched_scan_start) 3463 return -EOPNOTSUPP; 3464 3465 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE])) 3466 return -EINVAL; 3467 3468 if (rdev->sched_scan_req) 3469 return -EINPROGRESS; 3470 3471 if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]) 3472 return -EINVAL; 3473 3474 interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]); 3475 if (interval == 0) 3476 return -EINVAL; 3477 3478 wiphy = &rdev->wiphy; 3479 3480 if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) { 3481 n_channels = validate_scan_freqs( 3482 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]); 3483 if (!n_channels) 3484 return -EINVAL; 3485 } else { 3486 n_channels = 0; 3487 3488 for (band = 0; band < IEEE80211_NUM_BANDS; band++) 3489 if (wiphy->bands[band]) 3490 n_channels += wiphy->bands[band]->n_channels; 3491 } 3492 3493 if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) 3494 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], 3495 tmp) 3496 n_ssids++; 3497 3498 if (n_ssids > wiphy->max_scan_ssids) 3499 return -EINVAL; 3500 3501 if (info->attrs[NL80211_ATTR_IE]) 3502 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]); 3503 else 3504 ie_len = 0; 3505 3506 if (ie_len > wiphy->max_scan_ie_len) 3507 return -EINVAL; 3508 3509 request = kzalloc(sizeof(*request) 3510 + sizeof(*ssid) * n_ssids 3511 + sizeof(channel) * n_channels 3512 + ie_len, GFP_KERNEL); 3513 if (!request) 3514 return -ENOMEM; 3515 3516 if (n_ssids) 3517 request->ssids = (void *)&request->channels[n_channels]; 3518 request->n_ssids = n_ssids; 3519 if (ie_len) { 3520 if (request->ssids) 3521 request->ie = (void *)(request->ssids + n_ssids); 3522 else 3523 request->ie = (void *)(request->channels + n_channels); 3524 } 3525 3526 i = 0; 3527 if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) { 3528 /* user specified, bail out if channel not found */ 3529 nla_for_each_nested(attr, 3530 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], 3531 tmp) { 3532 struct ieee80211_channel *chan; 3533 3534 chan = ieee80211_get_channel(wiphy, nla_get_u32(attr)); 3535 3536 if (!chan) { 3537 err = -EINVAL; 3538 goto out_free; 3539 } 3540 3541 /* ignore disabled channels */ 3542 if (chan->flags & IEEE80211_CHAN_DISABLED) 3543 continue; 3544 3545 request->channels[i] = chan; 3546 i++; 3547 } 3548 } else { 3549 /* all channels */ 3550 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 3551 int j; 3552 if (!wiphy->bands[band]) 3553 continue; 3554 for (j = 0; j < wiphy->bands[band]->n_channels; j++) { 3555 struct ieee80211_channel *chan; 3556 3557 chan = &wiphy->bands[band]->channels[j]; 3558 3559 if (chan->flags & IEEE80211_CHAN_DISABLED) 3560 continue; 3561 3562 request->channels[i] = chan; 3563 i++; 3564 } 3565 } 3566 } 3567 3568 if (!i) { 3569 err = -EINVAL; 3570 goto out_free; 3571 } 3572 3573 request->n_channels = i; 3574 3575 i = 0; 3576 if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) { 3577 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], 3578 tmp) { 3579 if (request->ssids[i].ssid_len > 3580 IEEE80211_MAX_SSID_LEN) { 3581 err = -EINVAL; 3582 goto out_free; 3583 } 3584 memcpy(request->ssids[i].ssid, nla_data(attr), 3585 nla_len(attr)); 3586 request->ssids[i].ssid_len = nla_len(attr); 3587 i++; 3588 } 3589 } 3590 3591 if (info->attrs[NL80211_ATTR_IE]) { 3592 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]); 3593 memcpy((void *)request->ie, 3594 nla_data(info->attrs[NL80211_ATTR_IE]), 3595 request->ie_len); 3596 } 3597 3598 request->dev = dev; 3599 request->wiphy = &rdev->wiphy; 3600 request->interval = interval; 3601 3602 err = rdev->ops->sched_scan_start(&rdev->wiphy, dev, request); 3603 if (!err) { 3604 rdev->sched_scan_req = request; 3605 nl80211_send_sched_scan(rdev, dev, 3606 NL80211_CMD_START_SCHED_SCAN); 3607 goto out; 3608 } 3609 3610 out_free: 3611 kfree(request); 3612 out: 3613 return err; 3614 } 3615 3616 static int nl80211_stop_sched_scan(struct sk_buff *skb, 3617 struct genl_info *info) 3618 { 3619 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 3620 3621 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) || 3622 !rdev->ops->sched_scan_stop) 3623 return -EOPNOTSUPP; 3624 3625 return __cfg80211_stop_sched_scan(rdev, false); 3626 } 3627 3628 static int nl80211_send_bss(struct sk_buff *msg, u32 pid, u32 seq, int flags, 3629 struct cfg80211_registered_device *rdev, 3630 struct wireless_dev *wdev, 3631 struct cfg80211_internal_bss *intbss) 3632 { 3633 struct cfg80211_bss *res = &intbss->pub; 3634 void *hdr; 3635 struct nlattr *bss; 3636 int i; 3637 3638 ASSERT_WDEV_LOCK(wdev); 3639 3640 hdr = nl80211hdr_put(msg, pid, seq, flags, 3641 NL80211_CMD_NEW_SCAN_RESULTS); 3642 if (!hdr) 3643 return -1; 3644 3645 NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation); 3646 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex); 3647 3648 bss = nla_nest_start(msg, NL80211_ATTR_BSS); 3649 if (!bss) 3650 goto nla_put_failure; 3651 if (!is_zero_ether_addr(res->bssid)) 3652 NLA_PUT(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid); 3653 if (res->information_elements && res->len_information_elements) 3654 NLA_PUT(msg, NL80211_BSS_INFORMATION_ELEMENTS, 3655 res->len_information_elements, 3656 res->information_elements); 3657 if (res->beacon_ies && res->len_beacon_ies && 3658 res->beacon_ies != res->information_elements) 3659 NLA_PUT(msg, NL80211_BSS_BEACON_IES, 3660 res->len_beacon_ies, res->beacon_ies); 3661 if (res->tsf) 3662 NLA_PUT_U64(msg, NL80211_BSS_TSF, res->tsf); 3663 if (res->beacon_interval) 3664 NLA_PUT_U16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval); 3665 NLA_PUT_U16(msg, NL80211_BSS_CAPABILITY, res->capability); 3666 NLA_PUT_U32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq); 3667 NLA_PUT_U32(msg, NL80211_BSS_SEEN_MS_AGO, 3668 jiffies_to_msecs(jiffies - intbss->ts)); 3669 3670 switch (rdev->wiphy.signal_type) { 3671 case CFG80211_SIGNAL_TYPE_MBM: 3672 NLA_PUT_U32(msg, NL80211_BSS_SIGNAL_MBM, res->signal); 3673 break; 3674 case CFG80211_SIGNAL_TYPE_UNSPEC: 3675 NLA_PUT_U8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal); 3676 break; 3677 default: 3678 break; 3679 } 3680 3681 switch (wdev->iftype) { 3682 case NL80211_IFTYPE_P2P_CLIENT: 3683 case NL80211_IFTYPE_STATION: 3684 if (intbss == wdev->current_bss) 3685 NLA_PUT_U32(msg, NL80211_BSS_STATUS, 3686 NL80211_BSS_STATUS_ASSOCIATED); 3687 else for (i = 0; i < MAX_AUTH_BSSES; i++) { 3688 if (intbss != wdev->auth_bsses[i]) 3689 continue; 3690 NLA_PUT_U32(msg, NL80211_BSS_STATUS, 3691 NL80211_BSS_STATUS_AUTHENTICATED); 3692 break; 3693 } 3694 break; 3695 case NL80211_IFTYPE_ADHOC: 3696 if (intbss == wdev->current_bss) 3697 NLA_PUT_U32(msg, NL80211_BSS_STATUS, 3698 NL80211_BSS_STATUS_IBSS_JOINED); 3699 break; 3700 default: 3701 break; 3702 } 3703 3704 nla_nest_end(msg, bss); 3705 3706 return genlmsg_end(msg, hdr); 3707 3708 nla_put_failure: 3709 genlmsg_cancel(msg, hdr); 3710 return -EMSGSIZE; 3711 } 3712 3713 static int nl80211_dump_scan(struct sk_buff *skb, 3714 struct netlink_callback *cb) 3715 { 3716 struct cfg80211_registered_device *rdev; 3717 struct net_device *dev; 3718 struct cfg80211_internal_bss *scan; 3719 struct wireless_dev *wdev; 3720 int start = cb->args[1], idx = 0; 3721 int err; 3722 3723 err = nl80211_prepare_netdev_dump(skb, cb, &rdev, &dev); 3724 if (err) 3725 return err; 3726 3727 wdev = dev->ieee80211_ptr; 3728 3729 wdev_lock(wdev); 3730 spin_lock_bh(&rdev->bss_lock); 3731 cfg80211_bss_expire(rdev); 3732 3733 list_for_each_entry(scan, &rdev->bss_list, list) { 3734 if (++idx <= start) 3735 continue; 3736 if (nl80211_send_bss(skb, 3737 NETLINK_CB(cb->skb).pid, 3738 cb->nlh->nlmsg_seq, NLM_F_MULTI, 3739 rdev, wdev, scan) < 0) { 3740 idx--; 3741 break; 3742 } 3743 } 3744 3745 spin_unlock_bh(&rdev->bss_lock); 3746 wdev_unlock(wdev); 3747 3748 cb->args[1] = idx; 3749 nl80211_finish_netdev_dump(rdev); 3750 3751 return skb->len; 3752 } 3753 3754 static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq, 3755 int flags, struct net_device *dev, 3756 struct survey_info *survey) 3757 { 3758 void *hdr; 3759 struct nlattr *infoattr; 3760 3761 /* Survey without a channel doesn't make sense */ 3762 if (!survey->channel) 3763 return -EINVAL; 3764 3765 hdr = nl80211hdr_put(msg, pid, seq, flags, 3766 NL80211_CMD_NEW_SURVEY_RESULTS); 3767 if (!hdr) 3768 return -ENOMEM; 3769 3770 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex); 3771 3772 infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO); 3773 if (!infoattr) 3774 goto nla_put_failure; 3775 3776 NLA_PUT_U32(msg, NL80211_SURVEY_INFO_FREQUENCY, 3777 survey->channel->center_freq); 3778 if (survey->filled & SURVEY_INFO_NOISE_DBM) 3779 NLA_PUT_U8(msg, NL80211_SURVEY_INFO_NOISE, 3780 survey->noise); 3781 if (survey->filled & SURVEY_INFO_IN_USE) 3782 NLA_PUT_FLAG(msg, NL80211_SURVEY_INFO_IN_USE); 3783 if (survey->filled & SURVEY_INFO_CHANNEL_TIME) 3784 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME, 3785 survey->channel_time); 3786 if (survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY) 3787 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY, 3788 survey->channel_time_busy); 3789 if (survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY) 3790 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY, 3791 survey->channel_time_ext_busy); 3792 if (survey->filled & SURVEY_INFO_CHANNEL_TIME_RX) 3793 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX, 3794 survey->channel_time_rx); 3795 if (survey->filled & SURVEY_INFO_CHANNEL_TIME_TX) 3796 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX, 3797 survey->channel_time_tx); 3798 3799 nla_nest_end(msg, infoattr); 3800 3801 return genlmsg_end(msg, hdr); 3802 3803 nla_put_failure: 3804 genlmsg_cancel(msg, hdr); 3805 return -EMSGSIZE; 3806 } 3807 3808 static int nl80211_dump_survey(struct sk_buff *skb, 3809 struct netlink_callback *cb) 3810 { 3811 struct survey_info survey; 3812 struct cfg80211_registered_device *dev; 3813 struct net_device *netdev; 3814 int survey_idx = cb->args[1]; 3815 int res; 3816 3817 res = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev); 3818 if (res) 3819 return res; 3820 3821 if (!dev->ops->dump_survey) { 3822 res = -EOPNOTSUPP; 3823 goto out_err; 3824 } 3825 3826 while (1) { 3827 res = dev->ops->dump_survey(&dev->wiphy, netdev, survey_idx, 3828 &survey); 3829 if (res == -ENOENT) 3830 break; 3831 if (res) 3832 goto out_err; 3833 3834 if (nl80211_send_survey(skb, 3835 NETLINK_CB(cb->skb).pid, 3836 cb->nlh->nlmsg_seq, NLM_F_MULTI, 3837 netdev, 3838 &survey) < 0) 3839 goto out; 3840 survey_idx++; 3841 } 3842 3843 out: 3844 cb->args[1] = survey_idx; 3845 res = skb->len; 3846 out_err: 3847 nl80211_finish_netdev_dump(dev); 3848 return res; 3849 } 3850 3851 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type) 3852 { 3853 return auth_type <= NL80211_AUTHTYPE_MAX; 3854 } 3855 3856 static bool nl80211_valid_wpa_versions(u32 wpa_versions) 3857 { 3858 return !(wpa_versions & ~(NL80211_WPA_VERSION_1 | 3859 NL80211_WPA_VERSION_2)); 3860 } 3861 3862 static bool nl80211_valid_akm_suite(u32 akm) 3863 { 3864 return akm == WLAN_AKM_SUITE_8021X || 3865 akm == WLAN_AKM_SUITE_PSK; 3866 } 3867 3868 static bool nl80211_valid_cipher_suite(u32 cipher) 3869 { 3870 return cipher == WLAN_CIPHER_SUITE_WEP40 || 3871 cipher == WLAN_CIPHER_SUITE_WEP104 || 3872 cipher == WLAN_CIPHER_SUITE_TKIP || 3873 cipher == WLAN_CIPHER_SUITE_CCMP || 3874 cipher == WLAN_CIPHER_SUITE_AES_CMAC; 3875 } 3876 3877 3878 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info) 3879 { 3880 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 3881 struct net_device *dev = info->user_ptr[1]; 3882 struct ieee80211_channel *chan; 3883 const u8 *bssid, *ssid, *ie = NULL; 3884 int err, ssid_len, ie_len = 0; 3885 enum nl80211_auth_type auth_type; 3886 struct key_parse key; 3887 bool local_state_change; 3888 3889 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE])) 3890 return -EINVAL; 3891 3892 if (!info->attrs[NL80211_ATTR_MAC]) 3893 return -EINVAL; 3894 3895 if (!info->attrs[NL80211_ATTR_AUTH_TYPE]) 3896 return -EINVAL; 3897 3898 if (!info->attrs[NL80211_ATTR_SSID]) 3899 return -EINVAL; 3900 3901 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ]) 3902 return -EINVAL; 3903 3904 err = nl80211_parse_key(info, &key); 3905 if (err) 3906 return err; 3907 3908 if (key.idx >= 0) { 3909 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP) 3910 return -EINVAL; 3911 if (!key.p.key || !key.p.key_len) 3912 return -EINVAL; 3913 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 || 3914 key.p.key_len != WLAN_KEY_LEN_WEP40) && 3915 (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 || 3916 key.p.key_len != WLAN_KEY_LEN_WEP104)) 3917 return -EINVAL; 3918 if (key.idx > 4) 3919 return -EINVAL; 3920 } else { 3921 key.p.key_len = 0; 3922 key.p.key = NULL; 3923 } 3924 3925 if (key.idx >= 0) { 3926 int i; 3927 bool ok = false; 3928 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) { 3929 if (key.p.cipher == rdev->wiphy.cipher_suites[i]) { 3930 ok = true; 3931 break; 3932 } 3933 } 3934 if (!ok) 3935 return -EINVAL; 3936 } 3937 3938 if (!rdev->ops->auth) 3939 return -EOPNOTSUPP; 3940 3941 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION && 3942 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT) 3943 return -EOPNOTSUPP; 3944 3945 bssid = nla_data(info->attrs[NL80211_ATTR_MAC]); 3946 chan = ieee80211_get_channel(&rdev->wiphy, 3947 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ])); 3948 if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED)) 3949 return -EINVAL; 3950 3951 ssid = nla_data(info->attrs[NL80211_ATTR_SSID]); 3952 ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]); 3953 3954 if (info->attrs[NL80211_ATTR_IE]) { 3955 ie = nla_data(info->attrs[NL80211_ATTR_IE]); 3956 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]); 3957 } 3958 3959 auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]); 3960 if (!nl80211_valid_auth_type(auth_type)) 3961 return -EINVAL; 3962 3963 local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE]; 3964 3965 return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid, 3966 ssid, ssid_len, ie, ie_len, 3967 key.p.key, key.p.key_len, key.idx, 3968 local_state_change); 3969 } 3970 3971 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev, 3972 struct genl_info *info, 3973 struct cfg80211_crypto_settings *settings, 3974 int cipher_limit) 3975 { 3976 memset(settings, 0, sizeof(*settings)); 3977 3978 settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT]; 3979 3980 if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) { 3981 u16 proto; 3982 proto = nla_get_u16( 3983 info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]); 3984 settings->control_port_ethertype = cpu_to_be16(proto); 3985 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) && 3986 proto != ETH_P_PAE) 3987 return -EINVAL; 3988 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT]) 3989 settings->control_port_no_encrypt = true; 3990 } else 3991 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE); 3992 3993 if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) { 3994 void *data; 3995 int len, i; 3996 3997 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]); 3998 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]); 3999 settings->n_ciphers_pairwise = len / sizeof(u32); 4000 4001 if (len % sizeof(u32)) 4002 return -EINVAL; 4003 4004 if (settings->n_ciphers_pairwise > cipher_limit) 4005 return -EINVAL; 4006 4007 memcpy(settings->ciphers_pairwise, data, len); 4008 4009 for (i = 0; i < settings->n_ciphers_pairwise; i++) 4010 if (!nl80211_valid_cipher_suite( 4011 settings->ciphers_pairwise[i])) 4012 return -EINVAL; 4013 } 4014 4015 if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) { 4016 settings->cipher_group = 4017 nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]); 4018 if (!nl80211_valid_cipher_suite(settings->cipher_group)) 4019 return -EINVAL; 4020 } 4021 4022 if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) { 4023 settings->wpa_versions = 4024 nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]); 4025 if (!nl80211_valid_wpa_versions(settings->wpa_versions)) 4026 return -EINVAL; 4027 } 4028 4029 if (info->attrs[NL80211_ATTR_AKM_SUITES]) { 4030 void *data; 4031 int len, i; 4032 4033 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]); 4034 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]); 4035 settings->n_akm_suites = len / sizeof(u32); 4036 4037 if (len % sizeof(u32)) 4038 return -EINVAL; 4039 4040 memcpy(settings->akm_suites, data, len); 4041 4042 for (i = 0; i < settings->n_ciphers_pairwise; i++) 4043 if (!nl80211_valid_akm_suite(settings->akm_suites[i])) 4044 return -EINVAL; 4045 } 4046 4047 return 0; 4048 } 4049 4050 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info) 4051 { 4052 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 4053 struct net_device *dev = info->user_ptr[1]; 4054 struct cfg80211_crypto_settings crypto; 4055 struct ieee80211_channel *chan; 4056 const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL; 4057 int err, ssid_len, ie_len = 0; 4058 bool use_mfp = false; 4059 4060 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE])) 4061 return -EINVAL; 4062 4063 if (!info->attrs[NL80211_ATTR_MAC] || 4064 !info->attrs[NL80211_ATTR_SSID] || 4065 !info->attrs[NL80211_ATTR_WIPHY_FREQ]) 4066 return -EINVAL; 4067 4068 if (!rdev->ops->assoc) 4069 return -EOPNOTSUPP; 4070 4071 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION && 4072 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT) 4073 return -EOPNOTSUPP; 4074 4075 bssid = nla_data(info->attrs[NL80211_ATTR_MAC]); 4076 4077 chan = ieee80211_get_channel(&rdev->wiphy, 4078 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ])); 4079 if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED)) 4080 return -EINVAL; 4081 4082 ssid = nla_data(info->attrs[NL80211_ATTR_SSID]); 4083 ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]); 4084 4085 if (info->attrs[NL80211_ATTR_IE]) { 4086 ie = nla_data(info->attrs[NL80211_ATTR_IE]); 4087 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]); 4088 } 4089 4090 if (info->attrs[NL80211_ATTR_USE_MFP]) { 4091 enum nl80211_mfp mfp = 4092 nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]); 4093 if (mfp == NL80211_MFP_REQUIRED) 4094 use_mfp = true; 4095 else if (mfp != NL80211_MFP_NO) 4096 return -EINVAL; 4097 } 4098 4099 if (info->attrs[NL80211_ATTR_PREV_BSSID]) 4100 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]); 4101 4102 err = nl80211_crypto_settings(rdev, info, &crypto, 1); 4103 if (!err) 4104 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid, 4105 ssid, ssid_len, ie, ie_len, use_mfp, 4106 &crypto); 4107 4108 return err; 4109 } 4110 4111 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info) 4112 { 4113 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 4114 struct net_device *dev = info->user_ptr[1]; 4115 const u8 *ie = NULL, *bssid; 4116 int ie_len = 0; 4117 u16 reason_code; 4118 bool local_state_change; 4119 4120 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE])) 4121 return -EINVAL; 4122 4123 if (!info->attrs[NL80211_ATTR_MAC]) 4124 return -EINVAL; 4125 4126 if (!info->attrs[NL80211_ATTR_REASON_CODE]) 4127 return -EINVAL; 4128 4129 if (!rdev->ops->deauth) 4130 return -EOPNOTSUPP; 4131 4132 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION && 4133 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT) 4134 return -EOPNOTSUPP; 4135 4136 bssid = nla_data(info->attrs[NL80211_ATTR_MAC]); 4137 4138 reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]); 4139 if (reason_code == 0) { 4140 /* Reason Code 0 is reserved */ 4141 return -EINVAL; 4142 } 4143 4144 if (info->attrs[NL80211_ATTR_IE]) { 4145 ie = nla_data(info->attrs[NL80211_ATTR_IE]); 4146 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]); 4147 } 4148 4149 local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE]; 4150 4151 return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code, 4152 local_state_change); 4153 } 4154 4155 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info) 4156 { 4157 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 4158 struct net_device *dev = info->user_ptr[1]; 4159 const u8 *ie = NULL, *bssid; 4160 int ie_len = 0; 4161 u16 reason_code; 4162 bool local_state_change; 4163 4164 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE])) 4165 return -EINVAL; 4166 4167 if (!info->attrs[NL80211_ATTR_MAC]) 4168 return -EINVAL; 4169 4170 if (!info->attrs[NL80211_ATTR_REASON_CODE]) 4171 return -EINVAL; 4172 4173 if (!rdev->ops->disassoc) 4174 return -EOPNOTSUPP; 4175 4176 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION && 4177 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT) 4178 return -EOPNOTSUPP; 4179 4180 bssid = nla_data(info->attrs[NL80211_ATTR_MAC]); 4181 4182 reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]); 4183 if (reason_code == 0) { 4184 /* Reason Code 0 is reserved */ 4185 return -EINVAL; 4186 } 4187 4188 if (info->attrs[NL80211_ATTR_IE]) { 4189 ie = nla_data(info->attrs[NL80211_ATTR_IE]); 4190 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]); 4191 } 4192 4193 local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE]; 4194 4195 return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code, 4196 local_state_change); 4197 } 4198 4199 static bool 4200 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev, 4201 int mcast_rate[IEEE80211_NUM_BANDS], 4202 int rateval) 4203 { 4204 struct wiphy *wiphy = &rdev->wiphy; 4205 bool found = false; 4206 int band, i; 4207 4208 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 4209 struct ieee80211_supported_band *sband; 4210 4211 sband = wiphy->bands[band]; 4212 if (!sband) 4213 continue; 4214 4215 for (i = 0; i < sband->n_bitrates; i++) { 4216 if (sband->bitrates[i].bitrate == rateval) { 4217 mcast_rate[band] = i + 1; 4218 found = true; 4219 break; 4220 } 4221 } 4222 } 4223 4224 return found; 4225 } 4226 4227 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info) 4228 { 4229 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 4230 struct net_device *dev = info->user_ptr[1]; 4231 struct cfg80211_ibss_params ibss; 4232 struct wiphy *wiphy; 4233 struct cfg80211_cached_keys *connkeys = NULL; 4234 int err; 4235 4236 memset(&ibss, 0, sizeof(ibss)); 4237 4238 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE])) 4239 return -EINVAL; 4240 4241 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] || 4242 !info->attrs[NL80211_ATTR_SSID] || 4243 !nla_len(info->attrs[NL80211_ATTR_SSID])) 4244 return -EINVAL; 4245 4246 ibss.beacon_interval = 100; 4247 4248 if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) { 4249 ibss.beacon_interval = 4250 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]); 4251 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000) 4252 return -EINVAL; 4253 } 4254 4255 if (!rdev->ops->join_ibss) 4256 return -EOPNOTSUPP; 4257 4258 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC) 4259 return -EOPNOTSUPP; 4260 4261 wiphy = &rdev->wiphy; 4262 4263 if (info->attrs[NL80211_ATTR_MAC]) 4264 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]); 4265 ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]); 4266 ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]); 4267 4268 if (info->attrs[NL80211_ATTR_IE]) { 4269 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]); 4270 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]); 4271 } 4272 4273 ibss.channel = ieee80211_get_channel(wiphy, 4274 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ])); 4275 if (!ibss.channel || 4276 ibss.channel->flags & IEEE80211_CHAN_NO_IBSS || 4277 ibss.channel->flags & IEEE80211_CHAN_DISABLED) 4278 return -EINVAL; 4279 4280 ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED]; 4281 ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY]; 4282 4283 if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) { 4284 u8 *rates = 4285 nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]); 4286 int n_rates = 4287 nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]); 4288 struct ieee80211_supported_band *sband = 4289 wiphy->bands[ibss.channel->band]; 4290 int i, j; 4291 4292 if (n_rates == 0) 4293 return -EINVAL; 4294 4295 for (i = 0; i < n_rates; i++) { 4296 int rate = (rates[i] & 0x7f) * 5; 4297 bool found = false; 4298 4299 for (j = 0; j < sband->n_bitrates; j++) { 4300 if (sband->bitrates[j].bitrate == rate) { 4301 found = true; 4302 ibss.basic_rates |= BIT(j); 4303 break; 4304 } 4305 } 4306 if (!found) 4307 return -EINVAL; 4308 } 4309 } 4310 4311 if (info->attrs[NL80211_ATTR_MCAST_RATE] && 4312 !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate, 4313 nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]))) 4314 return -EINVAL; 4315 4316 if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) { 4317 connkeys = nl80211_parse_connkeys(rdev, 4318 info->attrs[NL80211_ATTR_KEYS]); 4319 if (IS_ERR(connkeys)) 4320 return PTR_ERR(connkeys); 4321 } 4322 4323 err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys); 4324 if (err) 4325 kfree(connkeys); 4326 return err; 4327 } 4328 4329 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info) 4330 { 4331 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 4332 struct net_device *dev = info->user_ptr[1]; 4333 4334 if (!rdev->ops->leave_ibss) 4335 return -EOPNOTSUPP; 4336 4337 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC) 4338 return -EOPNOTSUPP; 4339 4340 return cfg80211_leave_ibss(rdev, dev, false); 4341 } 4342 4343 #ifdef CONFIG_NL80211_TESTMODE 4344 static struct genl_multicast_group nl80211_testmode_mcgrp = { 4345 .name = "testmode", 4346 }; 4347 4348 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info) 4349 { 4350 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 4351 int err; 4352 4353 if (!info->attrs[NL80211_ATTR_TESTDATA]) 4354 return -EINVAL; 4355 4356 err = -EOPNOTSUPP; 4357 if (rdev->ops->testmode_cmd) { 4358 rdev->testmode_info = info; 4359 err = rdev->ops->testmode_cmd(&rdev->wiphy, 4360 nla_data(info->attrs[NL80211_ATTR_TESTDATA]), 4361 nla_len(info->attrs[NL80211_ATTR_TESTDATA])); 4362 rdev->testmode_info = NULL; 4363 } 4364 4365 return err; 4366 } 4367 4368 static struct sk_buff * 4369 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev, 4370 int approxlen, u32 pid, u32 seq, gfp_t gfp) 4371 { 4372 struct sk_buff *skb; 4373 void *hdr; 4374 struct nlattr *data; 4375 4376 skb = nlmsg_new(approxlen + 100, gfp); 4377 if (!skb) 4378 return NULL; 4379 4380 hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE); 4381 if (!hdr) { 4382 kfree_skb(skb); 4383 return NULL; 4384 } 4385 4386 NLA_PUT_U32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx); 4387 data = nla_nest_start(skb, NL80211_ATTR_TESTDATA); 4388 4389 ((void **)skb->cb)[0] = rdev; 4390 ((void **)skb->cb)[1] = hdr; 4391 ((void **)skb->cb)[2] = data; 4392 4393 return skb; 4394 4395 nla_put_failure: 4396 kfree_skb(skb); 4397 return NULL; 4398 } 4399 4400 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy, 4401 int approxlen) 4402 { 4403 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); 4404 4405 if (WARN_ON(!rdev->testmode_info)) 4406 return NULL; 4407 4408 return __cfg80211_testmode_alloc_skb(rdev, approxlen, 4409 rdev->testmode_info->snd_pid, 4410 rdev->testmode_info->snd_seq, 4411 GFP_KERNEL); 4412 } 4413 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb); 4414 4415 int cfg80211_testmode_reply(struct sk_buff *skb) 4416 { 4417 struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0]; 4418 void *hdr = ((void **)skb->cb)[1]; 4419 struct nlattr *data = ((void **)skb->cb)[2]; 4420 4421 if (WARN_ON(!rdev->testmode_info)) { 4422 kfree_skb(skb); 4423 return -EINVAL; 4424 } 4425 4426 nla_nest_end(skb, data); 4427 genlmsg_end(skb, hdr); 4428 return genlmsg_reply(skb, rdev->testmode_info); 4429 } 4430 EXPORT_SYMBOL(cfg80211_testmode_reply); 4431 4432 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy, 4433 int approxlen, gfp_t gfp) 4434 { 4435 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); 4436 4437 return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp); 4438 } 4439 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb); 4440 4441 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp) 4442 { 4443 void *hdr = ((void **)skb->cb)[1]; 4444 struct nlattr *data = ((void **)skb->cb)[2]; 4445 4446 nla_nest_end(skb, data); 4447 genlmsg_end(skb, hdr); 4448 genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp); 4449 } 4450 EXPORT_SYMBOL(cfg80211_testmode_event); 4451 #endif 4452 4453 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info) 4454 { 4455 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 4456 struct net_device *dev = info->user_ptr[1]; 4457 struct cfg80211_connect_params connect; 4458 struct wiphy *wiphy; 4459 struct cfg80211_cached_keys *connkeys = NULL; 4460 int err; 4461 4462 memset(&connect, 0, sizeof(connect)); 4463 4464 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE])) 4465 return -EINVAL; 4466 4467 if (!info->attrs[NL80211_ATTR_SSID] || 4468 !nla_len(info->attrs[NL80211_ATTR_SSID])) 4469 return -EINVAL; 4470 4471 if (info->attrs[NL80211_ATTR_AUTH_TYPE]) { 4472 connect.auth_type = 4473 nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]); 4474 if (!nl80211_valid_auth_type(connect.auth_type)) 4475 return -EINVAL; 4476 } else 4477 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; 4478 4479 connect.privacy = info->attrs[NL80211_ATTR_PRIVACY]; 4480 4481 err = nl80211_crypto_settings(rdev, info, &connect.crypto, 4482 NL80211_MAX_NR_CIPHER_SUITES); 4483 if (err) 4484 return err; 4485 4486 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION && 4487 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT) 4488 return -EOPNOTSUPP; 4489 4490 wiphy = &rdev->wiphy; 4491 4492 if (info->attrs[NL80211_ATTR_MAC]) 4493 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]); 4494 connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]); 4495 connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]); 4496 4497 if (info->attrs[NL80211_ATTR_IE]) { 4498 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]); 4499 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]); 4500 } 4501 4502 if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) { 4503 connect.channel = 4504 ieee80211_get_channel(wiphy, 4505 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ])); 4506 if (!connect.channel || 4507 connect.channel->flags & IEEE80211_CHAN_DISABLED) 4508 return -EINVAL; 4509 } 4510 4511 if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) { 4512 connkeys = nl80211_parse_connkeys(rdev, 4513 info->attrs[NL80211_ATTR_KEYS]); 4514 if (IS_ERR(connkeys)) 4515 return PTR_ERR(connkeys); 4516 } 4517 4518 err = cfg80211_connect(rdev, dev, &connect, connkeys); 4519 if (err) 4520 kfree(connkeys); 4521 return err; 4522 } 4523 4524 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info) 4525 { 4526 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 4527 struct net_device *dev = info->user_ptr[1]; 4528 u16 reason; 4529 4530 if (!info->attrs[NL80211_ATTR_REASON_CODE]) 4531 reason = WLAN_REASON_DEAUTH_LEAVING; 4532 else 4533 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]); 4534 4535 if (reason == 0) 4536 return -EINVAL; 4537 4538 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION && 4539 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT) 4540 return -EOPNOTSUPP; 4541 4542 return cfg80211_disconnect(rdev, dev, reason, true); 4543 } 4544 4545 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info) 4546 { 4547 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 4548 struct net *net; 4549 int err; 4550 u32 pid; 4551 4552 if (!info->attrs[NL80211_ATTR_PID]) 4553 return -EINVAL; 4554 4555 pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]); 4556 4557 net = get_net_ns_by_pid(pid); 4558 if (IS_ERR(net)) 4559 return PTR_ERR(net); 4560 4561 err = 0; 4562 4563 /* check if anything to do */ 4564 if (!net_eq(wiphy_net(&rdev->wiphy), net)) 4565 err = cfg80211_switch_netns(rdev, net); 4566 4567 put_net(net); 4568 return err; 4569 } 4570 4571 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info) 4572 { 4573 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 4574 int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev, 4575 struct cfg80211_pmksa *pmksa) = NULL; 4576 struct net_device *dev = info->user_ptr[1]; 4577 struct cfg80211_pmksa pmksa; 4578 4579 memset(&pmksa, 0, sizeof(struct cfg80211_pmksa)); 4580 4581 if (!info->attrs[NL80211_ATTR_MAC]) 4582 return -EINVAL; 4583 4584 if (!info->attrs[NL80211_ATTR_PMKID]) 4585 return -EINVAL; 4586 4587 pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]); 4588 pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]); 4589 4590 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION && 4591 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT) 4592 return -EOPNOTSUPP; 4593 4594 switch (info->genlhdr->cmd) { 4595 case NL80211_CMD_SET_PMKSA: 4596 rdev_ops = rdev->ops->set_pmksa; 4597 break; 4598 case NL80211_CMD_DEL_PMKSA: 4599 rdev_ops = rdev->ops->del_pmksa; 4600 break; 4601 default: 4602 WARN_ON(1); 4603 break; 4604 } 4605 4606 if (!rdev_ops) 4607 return -EOPNOTSUPP; 4608 4609 return rdev_ops(&rdev->wiphy, dev, &pmksa); 4610 } 4611 4612 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info) 4613 { 4614 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 4615 struct net_device *dev = info->user_ptr[1]; 4616 4617 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION && 4618 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT) 4619 return -EOPNOTSUPP; 4620 4621 if (!rdev->ops->flush_pmksa) 4622 return -EOPNOTSUPP; 4623 4624 return rdev->ops->flush_pmksa(&rdev->wiphy, dev); 4625 } 4626 4627 static int nl80211_remain_on_channel(struct sk_buff *skb, 4628 struct genl_info *info) 4629 { 4630 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 4631 struct net_device *dev = info->user_ptr[1]; 4632 struct ieee80211_channel *chan; 4633 struct sk_buff *msg; 4634 void *hdr; 4635 u64 cookie; 4636 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT; 4637 u32 freq, duration; 4638 int err; 4639 4640 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] || 4641 !info->attrs[NL80211_ATTR_DURATION]) 4642 return -EINVAL; 4643 4644 duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]); 4645 4646 /* 4647 * We should be on that channel for at least one jiffie, 4648 * and more than 5 seconds seems excessive. 4649 */ 4650 if (!duration || !msecs_to_jiffies(duration) || 4651 duration > rdev->wiphy.max_remain_on_channel_duration) 4652 return -EINVAL; 4653 4654 if (!rdev->ops->remain_on_channel) 4655 return -EOPNOTSUPP; 4656 4657 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) { 4658 channel_type = nla_get_u32( 4659 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]); 4660 if (channel_type != NL80211_CHAN_NO_HT && 4661 channel_type != NL80211_CHAN_HT20 && 4662 channel_type != NL80211_CHAN_HT40PLUS && 4663 channel_type != NL80211_CHAN_HT40MINUS) 4664 return -EINVAL; 4665 } 4666 4667 freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]); 4668 chan = rdev_freq_to_chan(rdev, freq, channel_type); 4669 if (chan == NULL) 4670 return -EINVAL; 4671 4672 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 4673 if (!msg) 4674 return -ENOMEM; 4675 4676 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0, 4677 NL80211_CMD_REMAIN_ON_CHANNEL); 4678 4679 if (IS_ERR(hdr)) { 4680 err = PTR_ERR(hdr); 4681 goto free_msg; 4682 } 4683 4684 err = rdev->ops->remain_on_channel(&rdev->wiphy, dev, chan, 4685 channel_type, duration, &cookie); 4686 4687 if (err) 4688 goto free_msg; 4689 4690 NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie); 4691 4692 genlmsg_end(msg, hdr); 4693 4694 return genlmsg_reply(msg, info); 4695 4696 nla_put_failure: 4697 err = -ENOBUFS; 4698 free_msg: 4699 nlmsg_free(msg); 4700 return err; 4701 } 4702 4703 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb, 4704 struct genl_info *info) 4705 { 4706 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 4707 struct net_device *dev = info->user_ptr[1]; 4708 u64 cookie; 4709 4710 if (!info->attrs[NL80211_ATTR_COOKIE]) 4711 return -EINVAL; 4712 4713 if (!rdev->ops->cancel_remain_on_channel) 4714 return -EOPNOTSUPP; 4715 4716 cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]); 4717 4718 return rdev->ops->cancel_remain_on_channel(&rdev->wiphy, dev, cookie); 4719 } 4720 4721 static u32 rateset_to_mask(struct ieee80211_supported_band *sband, 4722 u8 *rates, u8 rates_len) 4723 { 4724 u8 i; 4725 u32 mask = 0; 4726 4727 for (i = 0; i < rates_len; i++) { 4728 int rate = (rates[i] & 0x7f) * 5; 4729 int ridx; 4730 for (ridx = 0; ridx < sband->n_bitrates; ridx++) { 4731 struct ieee80211_rate *srate = 4732 &sband->bitrates[ridx]; 4733 if (rate == srate->bitrate) { 4734 mask |= 1 << ridx; 4735 break; 4736 } 4737 } 4738 if (ridx == sband->n_bitrates) 4739 return 0; /* rate not found */ 4740 } 4741 4742 return mask; 4743 } 4744 4745 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = { 4746 [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY, 4747 .len = NL80211_MAX_SUPP_RATES }, 4748 }; 4749 4750 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb, 4751 struct genl_info *info) 4752 { 4753 struct nlattr *tb[NL80211_TXRATE_MAX + 1]; 4754 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 4755 struct cfg80211_bitrate_mask mask; 4756 int rem, i; 4757 struct net_device *dev = info->user_ptr[1]; 4758 struct nlattr *tx_rates; 4759 struct ieee80211_supported_band *sband; 4760 4761 if (info->attrs[NL80211_ATTR_TX_RATES] == NULL) 4762 return -EINVAL; 4763 4764 if (!rdev->ops->set_bitrate_mask) 4765 return -EOPNOTSUPP; 4766 4767 memset(&mask, 0, sizeof(mask)); 4768 /* Default to all rates enabled */ 4769 for (i = 0; i < IEEE80211_NUM_BANDS; i++) { 4770 sband = rdev->wiphy.bands[i]; 4771 mask.control[i].legacy = 4772 sband ? (1 << sband->n_bitrates) - 1 : 0; 4773 } 4774 4775 /* 4776 * The nested attribute uses enum nl80211_band as the index. This maps 4777 * directly to the enum ieee80211_band values used in cfg80211. 4778 */ 4779 nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem) 4780 { 4781 enum ieee80211_band band = nla_type(tx_rates); 4782 if (band < 0 || band >= IEEE80211_NUM_BANDS) 4783 return -EINVAL; 4784 sband = rdev->wiphy.bands[band]; 4785 if (sband == NULL) 4786 return -EINVAL; 4787 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates), 4788 nla_len(tx_rates), nl80211_txattr_policy); 4789 if (tb[NL80211_TXRATE_LEGACY]) { 4790 mask.control[band].legacy = rateset_to_mask( 4791 sband, 4792 nla_data(tb[NL80211_TXRATE_LEGACY]), 4793 nla_len(tb[NL80211_TXRATE_LEGACY])); 4794 if (mask.control[band].legacy == 0) 4795 return -EINVAL; 4796 } 4797 } 4798 4799 return rdev->ops->set_bitrate_mask(&rdev->wiphy, dev, NULL, &mask); 4800 } 4801 4802 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info) 4803 { 4804 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 4805 struct net_device *dev = info->user_ptr[1]; 4806 u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION; 4807 4808 if (!info->attrs[NL80211_ATTR_FRAME_MATCH]) 4809 return -EINVAL; 4810 4811 if (info->attrs[NL80211_ATTR_FRAME_TYPE]) 4812 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]); 4813 4814 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION && 4815 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC && 4816 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT && 4817 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP && 4818 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN && 4819 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT && 4820 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) 4821 return -EOPNOTSUPP; 4822 4823 /* not much point in registering if we can't reply */ 4824 if (!rdev->ops->mgmt_tx) 4825 return -EOPNOTSUPP; 4826 4827 return cfg80211_mlme_register_mgmt(dev->ieee80211_ptr, info->snd_pid, 4828 frame_type, 4829 nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]), 4830 nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH])); 4831 } 4832 4833 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info) 4834 { 4835 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 4836 struct net_device *dev = info->user_ptr[1]; 4837 struct ieee80211_channel *chan; 4838 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT; 4839 bool channel_type_valid = false; 4840 u32 freq; 4841 int err; 4842 void *hdr; 4843 u64 cookie; 4844 struct sk_buff *msg; 4845 unsigned int wait = 0; 4846 bool offchan; 4847 4848 if (!info->attrs[NL80211_ATTR_FRAME] || 4849 !info->attrs[NL80211_ATTR_WIPHY_FREQ]) 4850 return -EINVAL; 4851 4852 if (!rdev->ops->mgmt_tx) 4853 return -EOPNOTSUPP; 4854 4855 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION && 4856 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC && 4857 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT && 4858 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP && 4859 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN && 4860 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT && 4861 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) 4862 return -EOPNOTSUPP; 4863 4864 if (info->attrs[NL80211_ATTR_DURATION]) { 4865 if (!rdev->ops->mgmt_tx_cancel_wait) 4866 return -EINVAL; 4867 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]); 4868 } 4869 4870 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) { 4871 channel_type = nla_get_u32( 4872 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]); 4873 if (channel_type != NL80211_CHAN_NO_HT && 4874 channel_type != NL80211_CHAN_HT20 && 4875 channel_type != NL80211_CHAN_HT40PLUS && 4876 channel_type != NL80211_CHAN_HT40MINUS) 4877 return -EINVAL; 4878 channel_type_valid = true; 4879 } 4880 4881 offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK]; 4882 4883 freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]); 4884 chan = rdev_freq_to_chan(rdev, freq, channel_type); 4885 if (chan == NULL) 4886 return -EINVAL; 4887 4888 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 4889 if (!msg) 4890 return -ENOMEM; 4891 4892 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0, 4893 NL80211_CMD_FRAME); 4894 4895 if (IS_ERR(hdr)) { 4896 err = PTR_ERR(hdr); 4897 goto free_msg; 4898 } 4899 err = cfg80211_mlme_mgmt_tx(rdev, dev, chan, offchan, channel_type, 4900 channel_type_valid, wait, 4901 nla_data(info->attrs[NL80211_ATTR_FRAME]), 4902 nla_len(info->attrs[NL80211_ATTR_FRAME]), 4903 &cookie); 4904 if (err) 4905 goto free_msg; 4906 4907 NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie); 4908 4909 genlmsg_end(msg, hdr); 4910 return genlmsg_reply(msg, info); 4911 4912 nla_put_failure: 4913 err = -ENOBUFS; 4914 free_msg: 4915 nlmsg_free(msg); 4916 return err; 4917 } 4918 4919 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info) 4920 { 4921 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 4922 struct net_device *dev = info->user_ptr[1]; 4923 u64 cookie; 4924 4925 if (!info->attrs[NL80211_ATTR_COOKIE]) 4926 return -EINVAL; 4927 4928 if (!rdev->ops->mgmt_tx_cancel_wait) 4929 return -EOPNOTSUPP; 4930 4931 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION && 4932 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC && 4933 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT && 4934 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP && 4935 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN && 4936 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) 4937 return -EOPNOTSUPP; 4938 4939 cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]); 4940 4941 return rdev->ops->mgmt_tx_cancel_wait(&rdev->wiphy, dev, cookie); 4942 } 4943 4944 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info) 4945 { 4946 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 4947 struct wireless_dev *wdev; 4948 struct net_device *dev = info->user_ptr[1]; 4949 u8 ps_state; 4950 bool state; 4951 int err; 4952 4953 if (!info->attrs[NL80211_ATTR_PS_STATE]) 4954 return -EINVAL; 4955 4956 ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]); 4957 4958 if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED) 4959 return -EINVAL; 4960 4961 wdev = dev->ieee80211_ptr; 4962 4963 if (!rdev->ops->set_power_mgmt) 4964 return -EOPNOTSUPP; 4965 4966 state = (ps_state == NL80211_PS_ENABLED) ? true : false; 4967 4968 if (state == wdev->ps) 4969 return 0; 4970 4971 err = rdev->ops->set_power_mgmt(wdev->wiphy, dev, state, 4972 wdev->ps_timeout); 4973 if (!err) 4974 wdev->ps = state; 4975 return err; 4976 } 4977 4978 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info) 4979 { 4980 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 4981 enum nl80211_ps_state ps_state; 4982 struct wireless_dev *wdev; 4983 struct net_device *dev = info->user_ptr[1]; 4984 struct sk_buff *msg; 4985 void *hdr; 4986 int err; 4987 4988 wdev = dev->ieee80211_ptr; 4989 4990 if (!rdev->ops->set_power_mgmt) 4991 return -EOPNOTSUPP; 4992 4993 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 4994 if (!msg) 4995 return -ENOMEM; 4996 4997 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0, 4998 NL80211_CMD_GET_POWER_SAVE); 4999 if (!hdr) { 5000 err = -ENOBUFS; 5001 goto free_msg; 5002 } 5003 5004 if (wdev->ps) 5005 ps_state = NL80211_PS_ENABLED; 5006 else 5007 ps_state = NL80211_PS_DISABLED; 5008 5009 NLA_PUT_U32(msg, NL80211_ATTR_PS_STATE, ps_state); 5010 5011 genlmsg_end(msg, hdr); 5012 return genlmsg_reply(msg, info); 5013 5014 nla_put_failure: 5015 err = -ENOBUFS; 5016 free_msg: 5017 nlmsg_free(msg); 5018 return err; 5019 } 5020 5021 static struct nla_policy 5022 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = { 5023 [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 }, 5024 [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 }, 5025 [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 }, 5026 }; 5027 5028 static int nl80211_set_cqm_rssi(struct genl_info *info, 5029 s32 threshold, u32 hysteresis) 5030 { 5031 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 5032 struct wireless_dev *wdev; 5033 struct net_device *dev = info->user_ptr[1]; 5034 5035 if (threshold > 0) 5036 return -EINVAL; 5037 5038 wdev = dev->ieee80211_ptr; 5039 5040 if (!rdev->ops->set_cqm_rssi_config) 5041 return -EOPNOTSUPP; 5042 5043 if (wdev->iftype != NL80211_IFTYPE_STATION && 5044 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT) 5045 return -EOPNOTSUPP; 5046 5047 return rdev->ops->set_cqm_rssi_config(wdev->wiphy, dev, 5048 threshold, hysteresis); 5049 } 5050 5051 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info) 5052 { 5053 struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1]; 5054 struct nlattr *cqm; 5055 int err; 5056 5057 cqm = info->attrs[NL80211_ATTR_CQM]; 5058 if (!cqm) { 5059 err = -EINVAL; 5060 goto out; 5061 } 5062 5063 err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm, 5064 nl80211_attr_cqm_policy); 5065 if (err) 5066 goto out; 5067 5068 if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] && 5069 attrs[NL80211_ATTR_CQM_RSSI_HYST]) { 5070 s32 threshold; 5071 u32 hysteresis; 5072 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]); 5073 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]); 5074 err = nl80211_set_cqm_rssi(info, threshold, hysteresis); 5075 } else 5076 err = -EINVAL; 5077 5078 out: 5079 return err; 5080 } 5081 5082 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info) 5083 { 5084 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 5085 struct net_device *dev = info->user_ptr[1]; 5086 struct mesh_config cfg; 5087 struct mesh_setup setup; 5088 int err; 5089 5090 /* start with default */ 5091 memcpy(&cfg, &default_mesh_config, sizeof(cfg)); 5092 memcpy(&setup, &default_mesh_setup, sizeof(setup)); 5093 5094 if (info->attrs[NL80211_ATTR_MESH_CONFIG]) { 5095 /* and parse parameters if given */ 5096 err = nl80211_parse_mesh_config(info, &cfg, NULL); 5097 if (err) 5098 return err; 5099 } 5100 5101 if (!info->attrs[NL80211_ATTR_MESH_ID] || 5102 !nla_len(info->attrs[NL80211_ATTR_MESH_ID])) 5103 return -EINVAL; 5104 5105 setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]); 5106 setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]); 5107 5108 if (info->attrs[NL80211_ATTR_MESH_SETUP]) { 5109 /* parse additional setup parameters if given */ 5110 err = nl80211_parse_mesh_setup(info, &setup); 5111 if (err) 5112 return err; 5113 } 5114 5115 return cfg80211_join_mesh(rdev, dev, &setup, &cfg); 5116 } 5117 5118 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info) 5119 { 5120 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 5121 struct net_device *dev = info->user_ptr[1]; 5122 5123 return cfg80211_leave_mesh(rdev, dev); 5124 } 5125 5126 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info) 5127 { 5128 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 5129 struct sk_buff *msg; 5130 void *hdr; 5131 5132 if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns) 5133 return -EOPNOTSUPP; 5134 5135 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 5136 if (!msg) 5137 return -ENOMEM; 5138 5139 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0, 5140 NL80211_CMD_GET_WOWLAN); 5141 if (!hdr) 5142 goto nla_put_failure; 5143 5144 if (rdev->wowlan) { 5145 struct nlattr *nl_wowlan; 5146 5147 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS); 5148 if (!nl_wowlan) 5149 goto nla_put_failure; 5150 5151 if (rdev->wowlan->any) 5152 NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_ANY); 5153 if (rdev->wowlan->disconnect) 5154 NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_DISCONNECT); 5155 if (rdev->wowlan->magic_pkt) 5156 NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT); 5157 if (rdev->wowlan->n_patterns) { 5158 struct nlattr *nl_pats, *nl_pat; 5159 int i, pat_len; 5160 5161 nl_pats = nla_nest_start(msg, 5162 NL80211_WOWLAN_TRIG_PKT_PATTERN); 5163 if (!nl_pats) 5164 goto nla_put_failure; 5165 5166 for (i = 0; i < rdev->wowlan->n_patterns; i++) { 5167 nl_pat = nla_nest_start(msg, i + 1); 5168 if (!nl_pat) 5169 goto nla_put_failure; 5170 pat_len = rdev->wowlan->patterns[i].pattern_len; 5171 NLA_PUT(msg, NL80211_WOWLAN_PKTPAT_MASK, 5172 DIV_ROUND_UP(pat_len, 8), 5173 rdev->wowlan->patterns[i].mask); 5174 NLA_PUT(msg, NL80211_WOWLAN_PKTPAT_PATTERN, 5175 pat_len, 5176 rdev->wowlan->patterns[i].pattern); 5177 nla_nest_end(msg, nl_pat); 5178 } 5179 nla_nest_end(msg, nl_pats); 5180 } 5181 5182 nla_nest_end(msg, nl_wowlan); 5183 } 5184 5185 genlmsg_end(msg, hdr); 5186 return genlmsg_reply(msg, info); 5187 5188 nla_put_failure: 5189 nlmsg_free(msg); 5190 return -ENOBUFS; 5191 } 5192 5193 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info) 5194 { 5195 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 5196 struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG]; 5197 struct cfg80211_wowlan no_triggers = {}; 5198 struct cfg80211_wowlan new_triggers = {}; 5199 struct wiphy_wowlan_support *wowlan = &rdev->wiphy.wowlan; 5200 int err, i; 5201 5202 if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns) 5203 return -EOPNOTSUPP; 5204 5205 if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) 5206 goto no_triggers; 5207 5208 err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG, 5209 nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]), 5210 nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]), 5211 nl80211_wowlan_policy); 5212 if (err) 5213 return err; 5214 5215 if (tb[NL80211_WOWLAN_TRIG_ANY]) { 5216 if (!(wowlan->flags & WIPHY_WOWLAN_ANY)) 5217 return -EINVAL; 5218 new_triggers.any = true; 5219 } 5220 5221 if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) { 5222 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT)) 5223 return -EINVAL; 5224 new_triggers.disconnect = true; 5225 } 5226 5227 if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) { 5228 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT)) 5229 return -EINVAL; 5230 new_triggers.magic_pkt = true; 5231 } 5232 5233 if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) { 5234 struct nlattr *pat; 5235 int n_patterns = 0; 5236 int rem, pat_len, mask_len; 5237 struct nlattr *pat_tb[NUM_NL80211_WOWLAN_PKTPAT]; 5238 5239 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN], 5240 rem) 5241 n_patterns++; 5242 if (n_patterns > wowlan->n_patterns) 5243 return -EINVAL; 5244 5245 new_triggers.patterns = kcalloc(n_patterns, 5246 sizeof(new_triggers.patterns[0]), 5247 GFP_KERNEL); 5248 if (!new_triggers.patterns) 5249 return -ENOMEM; 5250 5251 new_triggers.n_patterns = n_patterns; 5252 i = 0; 5253 5254 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN], 5255 rem) { 5256 nla_parse(pat_tb, MAX_NL80211_WOWLAN_PKTPAT, 5257 nla_data(pat), nla_len(pat), NULL); 5258 err = -EINVAL; 5259 if (!pat_tb[NL80211_WOWLAN_PKTPAT_MASK] || 5260 !pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]) 5261 goto error; 5262 pat_len = nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]); 5263 mask_len = DIV_ROUND_UP(pat_len, 8); 5264 if (nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]) != 5265 mask_len) 5266 goto error; 5267 if (pat_len > wowlan->pattern_max_len || 5268 pat_len < wowlan->pattern_min_len) 5269 goto error; 5270 5271 new_triggers.patterns[i].mask = 5272 kmalloc(mask_len + pat_len, GFP_KERNEL); 5273 if (!new_triggers.patterns[i].mask) { 5274 err = -ENOMEM; 5275 goto error; 5276 } 5277 new_triggers.patterns[i].pattern = 5278 new_triggers.patterns[i].mask + mask_len; 5279 memcpy(new_triggers.patterns[i].mask, 5280 nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]), 5281 mask_len); 5282 new_triggers.patterns[i].pattern_len = pat_len; 5283 memcpy(new_triggers.patterns[i].pattern, 5284 nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]), 5285 pat_len); 5286 i++; 5287 } 5288 } 5289 5290 if (memcmp(&new_triggers, &no_triggers, sizeof(new_triggers))) { 5291 struct cfg80211_wowlan *ntrig; 5292 ntrig = kmemdup(&new_triggers, sizeof(new_triggers), 5293 GFP_KERNEL); 5294 if (!ntrig) { 5295 err = -ENOMEM; 5296 goto error; 5297 } 5298 cfg80211_rdev_free_wowlan(rdev); 5299 rdev->wowlan = ntrig; 5300 } else { 5301 no_triggers: 5302 cfg80211_rdev_free_wowlan(rdev); 5303 rdev->wowlan = NULL; 5304 } 5305 5306 return 0; 5307 error: 5308 for (i = 0; i < new_triggers.n_patterns; i++) 5309 kfree(new_triggers.patterns[i].mask); 5310 kfree(new_triggers.patterns); 5311 return err; 5312 } 5313 5314 #define NL80211_FLAG_NEED_WIPHY 0x01 5315 #define NL80211_FLAG_NEED_NETDEV 0x02 5316 #define NL80211_FLAG_NEED_RTNL 0x04 5317 #define NL80211_FLAG_CHECK_NETDEV_UP 0x08 5318 #define NL80211_FLAG_NEED_NETDEV_UP (NL80211_FLAG_NEED_NETDEV |\ 5319 NL80211_FLAG_CHECK_NETDEV_UP) 5320 5321 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb, 5322 struct genl_info *info) 5323 { 5324 struct cfg80211_registered_device *rdev; 5325 struct net_device *dev; 5326 int err; 5327 bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL; 5328 5329 if (rtnl) 5330 rtnl_lock(); 5331 5332 if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) { 5333 rdev = cfg80211_get_dev_from_info(info); 5334 if (IS_ERR(rdev)) { 5335 if (rtnl) 5336 rtnl_unlock(); 5337 return PTR_ERR(rdev); 5338 } 5339 info->user_ptr[0] = rdev; 5340 } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) { 5341 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev); 5342 if (err) { 5343 if (rtnl) 5344 rtnl_unlock(); 5345 return err; 5346 } 5347 if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP && 5348 !netif_running(dev)) { 5349 cfg80211_unlock_rdev(rdev); 5350 dev_put(dev); 5351 if (rtnl) 5352 rtnl_unlock(); 5353 return -ENETDOWN; 5354 } 5355 info->user_ptr[0] = rdev; 5356 info->user_ptr[1] = dev; 5357 } 5358 5359 return 0; 5360 } 5361 5362 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb, 5363 struct genl_info *info) 5364 { 5365 if (info->user_ptr[0]) 5366 cfg80211_unlock_rdev(info->user_ptr[0]); 5367 if (info->user_ptr[1]) 5368 dev_put(info->user_ptr[1]); 5369 if (ops->internal_flags & NL80211_FLAG_NEED_RTNL) 5370 rtnl_unlock(); 5371 } 5372 5373 static struct genl_ops nl80211_ops[] = { 5374 { 5375 .cmd = NL80211_CMD_GET_WIPHY, 5376 .doit = nl80211_get_wiphy, 5377 .dumpit = nl80211_dump_wiphy, 5378 .policy = nl80211_policy, 5379 /* can be retrieved by unprivileged users */ 5380 .internal_flags = NL80211_FLAG_NEED_WIPHY, 5381 }, 5382 { 5383 .cmd = NL80211_CMD_SET_WIPHY, 5384 .doit = nl80211_set_wiphy, 5385 .policy = nl80211_policy, 5386 .flags = GENL_ADMIN_PERM, 5387 .internal_flags = NL80211_FLAG_NEED_RTNL, 5388 }, 5389 { 5390 .cmd = NL80211_CMD_GET_INTERFACE, 5391 .doit = nl80211_get_interface, 5392 .dumpit = nl80211_dump_interface, 5393 .policy = nl80211_policy, 5394 /* can be retrieved by unprivileged users */ 5395 .internal_flags = NL80211_FLAG_NEED_NETDEV, 5396 }, 5397 { 5398 .cmd = NL80211_CMD_SET_INTERFACE, 5399 .doit = nl80211_set_interface, 5400 .policy = nl80211_policy, 5401 .flags = GENL_ADMIN_PERM, 5402 .internal_flags = NL80211_FLAG_NEED_NETDEV | 5403 NL80211_FLAG_NEED_RTNL, 5404 }, 5405 { 5406 .cmd = NL80211_CMD_NEW_INTERFACE, 5407 .doit = nl80211_new_interface, 5408 .policy = nl80211_policy, 5409 .flags = GENL_ADMIN_PERM, 5410 .internal_flags = NL80211_FLAG_NEED_WIPHY | 5411 NL80211_FLAG_NEED_RTNL, 5412 }, 5413 { 5414 .cmd = NL80211_CMD_DEL_INTERFACE, 5415 .doit = nl80211_del_interface, 5416 .policy = nl80211_policy, 5417 .flags = GENL_ADMIN_PERM, 5418 .internal_flags = NL80211_FLAG_NEED_NETDEV | 5419 NL80211_FLAG_NEED_RTNL, 5420 }, 5421 { 5422 .cmd = NL80211_CMD_GET_KEY, 5423 .doit = nl80211_get_key, 5424 .policy = nl80211_policy, 5425 .flags = GENL_ADMIN_PERM, 5426 .internal_flags = NL80211_FLAG_NEED_NETDEV | 5427 NL80211_FLAG_NEED_RTNL, 5428 }, 5429 { 5430 .cmd = NL80211_CMD_SET_KEY, 5431 .doit = nl80211_set_key, 5432 .policy = nl80211_policy, 5433 .flags = GENL_ADMIN_PERM, 5434 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | 5435 NL80211_FLAG_NEED_RTNL, 5436 }, 5437 { 5438 .cmd = NL80211_CMD_NEW_KEY, 5439 .doit = nl80211_new_key, 5440 .policy = nl80211_policy, 5441 .flags = GENL_ADMIN_PERM, 5442 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | 5443 NL80211_FLAG_NEED_RTNL, 5444 }, 5445 { 5446 .cmd = NL80211_CMD_DEL_KEY, 5447 .doit = nl80211_del_key, 5448 .policy = nl80211_policy, 5449 .flags = GENL_ADMIN_PERM, 5450 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | 5451 NL80211_FLAG_NEED_RTNL, 5452 }, 5453 { 5454 .cmd = NL80211_CMD_SET_BEACON, 5455 .policy = nl80211_policy, 5456 .flags = GENL_ADMIN_PERM, 5457 .doit = nl80211_addset_beacon, 5458 .internal_flags = NL80211_FLAG_NEED_NETDEV | 5459 NL80211_FLAG_NEED_RTNL, 5460 }, 5461 { 5462 .cmd = NL80211_CMD_NEW_BEACON, 5463 .policy = nl80211_policy, 5464 .flags = GENL_ADMIN_PERM, 5465 .doit = nl80211_addset_beacon, 5466 .internal_flags = NL80211_FLAG_NEED_NETDEV | 5467 NL80211_FLAG_NEED_RTNL, 5468 }, 5469 { 5470 .cmd = NL80211_CMD_DEL_BEACON, 5471 .policy = nl80211_policy, 5472 .flags = GENL_ADMIN_PERM, 5473 .doit = nl80211_del_beacon, 5474 .internal_flags = NL80211_FLAG_NEED_NETDEV | 5475 NL80211_FLAG_NEED_RTNL, 5476 }, 5477 { 5478 .cmd = NL80211_CMD_GET_STATION, 5479 .doit = nl80211_get_station, 5480 .dumpit = nl80211_dump_station, 5481 .policy = nl80211_policy, 5482 .internal_flags = NL80211_FLAG_NEED_NETDEV | 5483 NL80211_FLAG_NEED_RTNL, 5484 }, 5485 { 5486 .cmd = NL80211_CMD_SET_STATION, 5487 .doit = nl80211_set_station, 5488 .policy = nl80211_policy, 5489 .flags = GENL_ADMIN_PERM, 5490 .internal_flags = NL80211_FLAG_NEED_NETDEV | 5491 NL80211_FLAG_NEED_RTNL, 5492 }, 5493 { 5494 .cmd = NL80211_CMD_NEW_STATION, 5495 .doit = nl80211_new_station, 5496 .policy = nl80211_policy, 5497 .flags = GENL_ADMIN_PERM, 5498 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | 5499 NL80211_FLAG_NEED_RTNL, 5500 }, 5501 { 5502 .cmd = NL80211_CMD_DEL_STATION, 5503 .doit = nl80211_del_station, 5504 .policy = nl80211_policy, 5505 .flags = GENL_ADMIN_PERM, 5506 .internal_flags = NL80211_FLAG_NEED_NETDEV | 5507 NL80211_FLAG_NEED_RTNL, 5508 }, 5509 { 5510 .cmd = NL80211_CMD_GET_MPATH, 5511 .doit = nl80211_get_mpath, 5512 .dumpit = nl80211_dump_mpath, 5513 .policy = nl80211_policy, 5514 .flags = GENL_ADMIN_PERM, 5515 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | 5516 NL80211_FLAG_NEED_RTNL, 5517 }, 5518 { 5519 .cmd = NL80211_CMD_SET_MPATH, 5520 .doit = nl80211_set_mpath, 5521 .policy = nl80211_policy, 5522 .flags = GENL_ADMIN_PERM, 5523 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | 5524 NL80211_FLAG_NEED_RTNL, 5525 }, 5526 { 5527 .cmd = NL80211_CMD_NEW_MPATH, 5528 .doit = nl80211_new_mpath, 5529 .policy = nl80211_policy, 5530 .flags = GENL_ADMIN_PERM, 5531 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | 5532 NL80211_FLAG_NEED_RTNL, 5533 }, 5534 { 5535 .cmd = NL80211_CMD_DEL_MPATH, 5536 .doit = nl80211_del_mpath, 5537 .policy = nl80211_policy, 5538 .flags = GENL_ADMIN_PERM, 5539 .internal_flags = NL80211_FLAG_NEED_NETDEV | 5540 NL80211_FLAG_NEED_RTNL, 5541 }, 5542 { 5543 .cmd = NL80211_CMD_SET_BSS, 5544 .doit = nl80211_set_bss, 5545 .policy = nl80211_policy, 5546 .flags = GENL_ADMIN_PERM, 5547 .internal_flags = NL80211_FLAG_NEED_NETDEV | 5548 NL80211_FLAG_NEED_RTNL, 5549 }, 5550 { 5551 .cmd = NL80211_CMD_GET_REG, 5552 .doit = nl80211_get_reg, 5553 .policy = nl80211_policy, 5554 /* can be retrieved by unprivileged users */ 5555 }, 5556 { 5557 .cmd = NL80211_CMD_SET_REG, 5558 .doit = nl80211_set_reg, 5559 .policy = nl80211_policy, 5560 .flags = GENL_ADMIN_PERM, 5561 }, 5562 { 5563 .cmd = NL80211_CMD_REQ_SET_REG, 5564 .doit = nl80211_req_set_reg, 5565 .policy = nl80211_policy, 5566 .flags = GENL_ADMIN_PERM, 5567 }, 5568 { 5569 .cmd = NL80211_CMD_GET_MESH_CONFIG, 5570 .doit = nl80211_get_mesh_config, 5571 .policy = nl80211_policy, 5572 /* can be retrieved by unprivileged users */ 5573 .internal_flags = NL80211_FLAG_NEED_NETDEV | 5574 NL80211_FLAG_NEED_RTNL, 5575 }, 5576 { 5577 .cmd = NL80211_CMD_SET_MESH_CONFIG, 5578 .doit = nl80211_update_mesh_config, 5579 .policy = nl80211_policy, 5580 .flags = GENL_ADMIN_PERM, 5581 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | 5582 NL80211_FLAG_NEED_RTNL, 5583 }, 5584 { 5585 .cmd = NL80211_CMD_TRIGGER_SCAN, 5586 .doit = nl80211_trigger_scan, 5587 .policy = nl80211_policy, 5588 .flags = GENL_ADMIN_PERM, 5589 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | 5590 NL80211_FLAG_NEED_RTNL, 5591 }, 5592 { 5593 .cmd = NL80211_CMD_GET_SCAN, 5594 .policy = nl80211_policy, 5595 .dumpit = nl80211_dump_scan, 5596 }, 5597 { 5598 .cmd = NL80211_CMD_START_SCHED_SCAN, 5599 .doit = nl80211_start_sched_scan, 5600 .policy = nl80211_policy, 5601 .flags = GENL_ADMIN_PERM, 5602 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | 5603 NL80211_FLAG_NEED_RTNL, 5604 }, 5605 { 5606 .cmd = NL80211_CMD_STOP_SCHED_SCAN, 5607 .doit = nl80211_stop_sched_scan, 5608 .policy = nl80211_policy, 5609 .flags = GENL_ADMIN_PERM, 5610 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | 5611 NL80211_FLAG_NEED_RTNL, 5612 }, 5613 { 5614 .cmd = NL80211_CMD_AUTHENTICATE, 5615 .doit = nl80211_authenticate, 5616 .policy = nl80211_policy, 5617 .flags = GENL_ADMIN_PERM, 5618 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | 5619 NL80211_FLAG_NEED_RTNL, 5620 }, 5621 { 5622 .cmd = NL80211_CMD_ASSOCIATE, 5623 .doit = nl80211_associate, 5624 .policy = nl80211_policy, 5625 .flags = GENL_ADMIN_PERM, 5626 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | 5627 NL80211_FLAG_NEED_RTNL, 5628 }, 5629 { 5630 .cmd = NL80211_CMD_DEAUTHENTICATE, 5631 .doit = nl80211_deauthenticate, 5632 .policy = nl80211_policy, 5633 .flags = GENL_ADMIN_PERM, 5634 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | 5635 NL80211_FLAG_NEED_RTNL, 5636 }, 5637 { 5638 .cmd = NL80211_CMD_DISASSOCIATE, 5639 .doit = nl80211_disassociate, 5640 .policy = nl80211_policy, 5641 .flags = GENL_ADMIN_PERM, 5642 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | 5643 NL80211_FLAG_NEED_RTNL, 5644 }, 5645 { 5646 .cmd = NL80211_CMD_JOIN_IBSS, 5647 .doit = nl80211_join_ibss, 5648 .policy = nl80211_policy, 5649 .flags = GENL_ADMIN_PERM, 5650 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | 5651 NL80211_FLAG_NEED_RTNL, 5652 }, 5653 { 5654 .cmd = NL80211_CMD_LEAVE_IBSS, 5655 .doit = nl80211_leave_ibss, 5656 .policy = nl80211_policy, 5657 .flags = GENL_ADMIN_PERM, 5658 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | 5659 NL80211_FLAG_NEED_RTNL, 5660 }, 5661 #ifdef CONFIG_NL80211_TESTMODE 5662 { 5663 .cmd = NL80211_CMD_TESTMODE, 5664 .doit = nl80211_testmode_do, 5665 .policy = nl80211_policy, 5666 .flags = GENL_ADMIN_PERM, 5667 .internal_flags = NL80211_FLAG_NEED_WIPHY | 5668 NL80211_FLAG_NEED_RTNL, 5669 }, 5670 #endif 5671 { 5672 .cmd = NL80211_CMD_CONNECT, 5673 .doit = nl80211_connect, 5674 .policy = nl80211_policy, 5675 .flags = GENL_ADMIN_PERM, 5676 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | 5677 NL80211_FLAG_NEED_RTNL, 5678 }, 5679 { 5680 .cmd = NL80211_CMD_DISCONNECT, 5681 .doit = nl80211_disconnect, 5682 .policy = nl80211_policy, 5683 .flags = GENL_ADMIN_PERM, 5684 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | 5685 NL80211_FLAG_NEED_RTNL, 5686 }, 5687 { 5688 .cmd = NL80211_CMD_SET_WIPHY_NETNS, 5689 .doit = nl80211_wiphy_netns, 5690 .policy = nl80211_policy, 5691 .flags = GENL_ADMIN_PERM, 5692 .internal_flags = NL80211_FLAG_NEED_WIPHY | 5693 NL80211_FLAG_NEED_RTNL, 5694 }, 5695 { 5696 .cmd = NL80211_CMD_GET_SURVEY, 5697 .policy = nl80211_policy, 5698 .dumpit = nl80211_dump_survey, 5699 }, 5700 { 5701 .cmd = NL80211_CMD_SET_PMKSA, 5702 .doit = nl80211_setdel_pmksa, 5703 .policy = nl80211_policy, 5704 .flags = GENL_ADMIN_PERM, 5705 .internal_flags = NL80211_FLAG_NEED_NETDEV | 5706 NL80211_FLAG_NEED_RTNL, 5707 }, 5708 { 5709 .cmd = NL80211_CMD_DEL_PMKSA, 5710 .doit = nl80211_setdel_pmksa, 5711 .policy = nl80211_policy, 5712 .flags = GENL_ADMIN_PERM, 5713 .internal_flags = NL80211_FLAG_NEED_NETDEV | 5714 NL80211_FLAG_NEED_RTNL, 5715 }, 5716 { 5717 .cmd = NL80211_CMD_FLUSH_PMKSA, 5718 .doit = nl80211_flush_pmksa, 5719 .policy = nl80211_policy, 5720 .flags = GENL_ADMIN_PERM, 5721 .internal_flags = NL80211_FLAG_NEED_NETDEV | 5722 NL80211_FLAG_NEED_RTNL, 5723 }, 5724 { 5725 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL, 5726 .doit = nl80211_remain_on_channel, 5727 .policy = nl80211_policy, 5728 .flags = GENL_ADMIN_PERM, 5729 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | 5730 NL80211_FLAG_NEED_RTNL, 5731 }, 5732 { 5733 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL, 5734 .doit = nl80211_cancel_remain_on_channel, 5735 .policy = nl80211_policy, 5736 .flags = GENL_ADMIN_PERM, 5737 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | 5738 NL80211_FLAG_NEED_RTNL, 5739 }, 5740 { 5741 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK, 5742 .doit = nl80211_set_tx_bitrate_mask, 5743 .policy = nl80211_policy, 5744 .flags = GENL_ADMIN_PERM, 5745 .internal_flags = NL80211_FLAG_NEED_NETDEV | 5746 NL80211_FLAG_NEED_RTNL, 5747 }, 5748 { 5749 .cmd = NL80211_CMD_REGISTER_FRAME, 5750 .doit = nl80211_register_mgmt, 5751 .policy = nl80211_policy, 5752 .flags = GENL_ADMIN_PERM, 5753 .internal_flags = NL80211_FLAG_NEED_NETDEV | 5754 NL80211_FLAG_NEED_RTNL, 5755 }, 5756 { 5757 .cmd = NL80211_CMD_FRAME, 5758 .doit = nl80211_tx_mgmt, 5759 .policy = nl80211_policy, 5760 .flags = GENL_ADMIN_PERM, 5761 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | 5762 NL80211_FLAG_NEED_RTNL, 5763 }, 5764 { 5765 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL, 5766 .doit = nl80211_tx_mgmt_cancel_wait, 5767 .policy = nl80211_policy, 5768 .flags = GENL_ADMIN_PERM, 5769 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | 5770 NL80211_FLAG_NEED_RTNL, 5771 }, 5772 { 5773 .cmd = NL80211_CMD_SET_POWER_SAVE, 5774 .doit = nl80211_set_power_save, 5775 .policy = nl80211_policy, 5776 .flags = GENL_ADMIN_PERM, 5777 .internal_flags = NL80211_FLAG_NEED_NETDEV | 5778 NL80211_FLAG_NEED_RTNL, 5779 }, 5780 { 5781 .cmd = NL80211_CMD_GET_POWER_SAVE, 5782 .doit = nl80211_get_power_save, 5783 .policy = nl80211_policy, 5784 /* can be retrieved by unprivileged users */ 5785 .internal_flags = NL80211_FLAG_NEED_NETDEV | 5786 NL80211_FLAG_NEED_RTNL, 5787 }, 5788 { 5789 .cmd = NL80211_CMD_SET_CQM, 5790 .doit = nl80211_set_cqm, 5791 .policy = nl80211_policy, 5792 .flags = GENL_ADMIN_PERM, 5793 .internal_flags = NL80211_FLAG_NEED_NETDEV | 5794 NL80211_FLAG_NEED_RTNL, 5795 }, 5796 { 5797 .cmd = NL80211_CMD_SET_CHANNEL, 5798 .doit = nl80211_set_channel, 5799 .policy = nl80211_policy, 5800 .flags = GENL_ADMIN_PERM, 5801 .internal_flags = NL80211_FLAG_NEED_NETDEV | 5802 NL80211_FLAG_NEED_RTNL, 5803 }, 5804 { 5805 .cmd = NL80211_CMD_SET_WDS_PEER, 5806 .doit = nl80211_set_wds_peer, 5807 .policy = nl80211_policy, 5808 .flags = GENL_ADMIN_PERM, 5809 .internal_flags = NL80211_FLAG_NEED_NETDEV | 5810 NL80211_FLAG_NEED_RTNL, 5811 }, 5812 { 5813 .cmd = NL80211_CMD_JOIN_MESH, 5814 .doit = nl80211_join_mesh, 5815 .policy = nl80211_policy, 5816 .flags = GENL_ADMIN_PERM, 5817 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | 5818 NL80211_FLAG_NEED_RTNL, 5819 }, 5820 { 5821 .cmd = NL80211_CMD_LEAVE_MESH, 5822 .doit = nl80211_leave_mesh, 5823 .policy = nl80211_policy, 5824 .flags = GENL_ADMIN_PERM, 5825 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | 5826 NL80211_FLAG_NEED_RTNL, 5827 }, 5828 { 5829 .cmd = NL80211_CMD_GET_WOWLAN, 5830 .doit = nl80211_get_wowlan, 5831 .policy = nl80211_policy, 5832 /* can be retrieved by unprivileged users */ 5833 .internal_flags = NL80211_FLAG_NEED_WIPHY | 5834 NL80211_FLAG_NEED_RTNL, 5835 }, 5836 { 5837 .cmd = NL80211_CMD_SET_WOWLAN, 5838 .doit = nl80211_set_wowlan, 5839 .policy = nl80211_policy, 5840 .flags = GENL_ADMIN_PERM, 5841 .internal_flags = NL80211_FLAG_NEED_WIPHY | 5842 NL80211_FLAG_NEED_RTNL, 5843 }, 5844 }; 5845 5846 static struct genl_multicast_group nl80211_mlme_mcgrp = { 5847 .name = "mlme", 5848 }; 5849 5850 /* multicast groups */ 5851 static struct genl_multicast_group nl80211_config_mcgrp = { 5852 .name = "config", 5853 }; 5854 static struct genl_multicast_group nl80211_scan_mcgrp = { 5855 .name = "scan", 5856 }; 5857 static struct genl_multicast_group nl80211_regulatory_mcgrp = { 5858 .name = "regulatory", 5859 }; 5860 5861 /* notification functions */ 5862 5863 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev) 5864 { 5865 struct sk_buff *msg; 5866 5867 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 5868 if (!msg) 5869 return; 5870 5871 if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) { 5872 nlmsg_free(msg); 5873 return; 5874 } 5875 5876 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0, 5877 nl80211_config_mcgrp.id, GFP_KERNEL); 5878 } 5879 5880 static int nl80211_add_scan_req(struct sk_buff *msg, 5881 struct cfg80211_registered_device *rdev) 5882 { 5883 struct cfg80211_scan_request *req = rdev->scan_req; 5884 struct nlattr *nest; 5885 int i; 5886 5887 ASSERT_RDEV_LOCK(rdev); 5888 5889 if (WARN_ON(!req)) 5890 return 0; 5891 5892 nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS); 5893 if (!nest) 5894 goto nla_put_failure; 5895 for (i = 0; i < req->n_ssids; i++) 5896 NLA_PUT(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid); 5897 nla_nest_end(msg, nest); 5898 5899 nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES); 5900 if (!nest) 5901 goto nla_put_failure; 5902 for (i = 0; i < req->n_channels; i++) 5903 NLA_PUT_U32(msg, i, req->channels[i]->center_freq); 5904 nla_nest_end(msg, nest); 5905 5906 if (req->ie) 5907 NLA_PUT(msg, NL80211_ATTR_IE, req->ie_len, req->ie); 5908 5909 return 0; 5910 nla_put_failure: 5911 return -ENOBUFS; 5912 } 5913 5914 static int nl80211_send_scan_msg(struct sk_buff *msg, 5915 struct cfg80211_registered_device *rdev, 5916 struct net_device *netdev, 5917 u32 pid, u32 seq, int flags, 5918 u32 cmd) 5919 { 5920 void *hdr; 5921 5922 hdr = nl80211hdr_put(msg, pid, seq, flags, cmd); 5923 if (!hdr) 5924 return -1; 5925 5926 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx); 5927 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex); 5928 5929 /* ignore errors and send incomplete event anyway */ 5930 nl80211_add_scan_req(msg, rdev); 5931 5932 return genlmsg_end(msg, hdr); 5933 5934 nla_put_failure: 5935 genlmsg_cancel(msg, hdr); 5936 return -EMSGSIZE; 5937 } 5938 5939 static int 5940 nl80211_send_sched_scan_msg(struct sk_buff *msg, 5941 struct cfg80211_registered_device *rdev, 5942 struct net_device *netdev, 5943 u32 pid, u32 seq, int flags, u32 cmd) 5944 { 5945 void *hdr; 5946 5947 hdr = nl80211hdr_put(msg, pid, seq, flags, cmd); 5948 if (!hdr) 5949 return -1; 5950 5951 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx); 5952 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex); 5953 5954 return genlmsg_end(msg, hdr); 5955 5956 nla_put_failure: 5957 genlmsg_cancel(msg, hdr); 5958 return -EMSGSIZE; 5959 } 5960 5961 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev, 5962 struct net_device *netdev) 5963 { 5964 struct sk_buff *msg; 5965 5966 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); 5967 if (!msg) 5968 return; 5969 5970 if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0, 5971 NL80211_CMD_TRIGGER_SCAN) < 0) { 5972 nlmsg_free(msg); 5973 return; 5974 } 5975 5976 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0, 5977 nl80211_scan_mcgrp.id, GFP_KERNEL); 5978 } 5979 5980 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev, 5981 struct net_device *netdev) 5982 { 5983 struct sk_buff *msg; 5984 5985 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 5986 if (!msg) 5987 return; 5988 5989 if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0, 5990 NL80211_CMD_NEW_SCAN_RESULTS) < 0) { 5991 nlmsg_free(msg); 5992 return; 5993 } 5994 5995 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0, 5996 nl80211_scan_mcgrp.id, GFP_KERNEL); 5997 } 5998 5999 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev, 6000 struct net_device *netdev) 6001 { 6002 struct sk_buff *msg; 6003 6004 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 6005 if (!msg) 6006 return; 6007 6008 if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0, 6009 NL80211_CMD_SCAN_ABORTED) < 0) { 6010 nlmsg_free(msg); 6011 return; 6012 } 6013 6014 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0, 6015 nl80211_scan_mcgrp.id, GFP_KERNEL); 6016 } 6017 6018 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev, 6019 struct net_device *netdev) 6020 { 6021 struct sk_buff *msg; 6022 6023 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 6024 if (!msg) 6025 return; 6026 6027 if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, 6028 NL80211_CMD_SCHED_SCAN_RESULTS) < 0) { 6029 nlmsg_free(msg); 6030 return; 6031 } 6032 6033 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0, 6034 nl80211_scan_mcgrp.id, GFP_KERNEL); 6035 } 6036 6037 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev, 6038 struct net_device *netdev, u32 cmd) 6039 { 6040 struct sk_buff *msg; 6041 6042 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); 6043 if (!msg) 6044 return; 6045 6046 if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) { 6047 nlmsg_free(msg); 6048 return; 6049 } 6050 6051 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0, 6052 nl80211_scan_mcgrp.id, GFP_KERNEL); 6053 } 6054 6055 /* 6056 * This can happen on global regulatory changes or device specific settings 6057 * based on custom world regulatory domains. 6058 */ 6059 void nl80211_send_reg_change_event(struct regulatory_request *request) 6060 { 6061 struct sk_buff *msg; 6062 void *hdr; 6063 6064 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 6065 if (!msg) 6066 return; 6067 6068 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE); 6069 if (!hdr) { 6070 nlmsg_free(msg); 6071 return; 6072 } 6073 6074 /* Userspace can always count this one always being set */ 6075 NLA_PUT_U8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator); 6076 6077 if (request->alpha2[0] == '0' && request->alpha2[1] == '0') 6078 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE, 6079 NL80211_REGDOM_TYPE_WORLD); 6080 else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') 6081 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE, 6082 NL80211_REGDOM_TYPE_CUSTOM_WORLD); 6083 else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') || 6084 request->intersect) 6085 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE, 6086 NL80211_REGDOM_TYPE_INTERSECTION); 6087 else { 6088 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE, 6089 NL80211_REGDOM_TYPE_COUNTRY); 6090 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, request->alpha2); 6091 } 6092 6093 if (wiphy_idx_valid(request->wiphy_idx)) 6094 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx); 6095 6096 if (genlmsg_end(msg, hdr) < 0) { 6097 nlmsg_free(msg); 6098 return; 6099 } 6100 6101 rcu_read_lock(); 6102 genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id, 6103 GFP_ATOMIC); 6104 rcu_read_unlock(); 6105 6106 return; 6107 6108 nla_put_failure: 6109 genlmsg_cancel(msg, hdr); 6110 nlmsg_free(msg); 6111 } 6112 6113 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev, 6114 struct net_device *netdev, 6115 const u8 *buf, size_t len, 6116 enum nl80211_commands cmd, gfp_t gfp) 6117 { 6118 struct sk_buff *msg; 6119 void *hdr; 6120 6121 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp); 6122 if (!msg) 6123 return; 6124 6125 hdr = nl80211hdr_put(msg, 0, 0, 0, cmd); 6126 if (!hdr) { 6127 nlmsg_free(msg); 6128 return; 6129 } 6130 6131 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx); 6132 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex); 6133 NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf); 6134 6135 if (genlmsg_end(msg, hdr) < 0) { 6136 nlmsg_free(msg); 6137 return; 6138 } 6139 6140 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0, 6141 nl80211_mlme_mcgrp.id, gfp); 6142 return; 6143 6144 nla_put_failure: 6145 genlmsg_cancel(msg, hdr); 6146 nlmsg_free(msg); 6147 } 6148 6149 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev, 6150 struct net_device *netdev, const u8 *buf, 6151 size_t len, gfp_t gfp) 6152 { 6153 nl80211_send_mlme_event(rdev, netdev, buf, len, 6154 NL80211_CMD_AUTHENTICATE, gfp); 6155 } 6156 6157 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev, 6158 struct net_device *netdev, const u8 *buf, 6159 size_t len, gfp_t gfp) 6160 { 6161 nl80211_send_mlme_event(rdev, netdev, buf, len, 6162 NL80211_CMD_ASSOCIATE, gfp); 6163 } 6164 6165 void nl80211_send_deauth(struct cfg80211_registered_device *rdev, 6166 struct net_device *netdev, const u8 *buf, 6167 size_t len, gfp_t gfp) 6168 { 6169 nl80211_send_mlme_event(rdev, netdev, buf, len, 6170 NL80211_CMD_DEAUTHENTICATE, gfp); 6171 } 6172 6173 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev, 6174 struct net_device *netdev, const u8 *buf, 6175 size_t len, gfp_t gfp) 6176 { 6177 nl80211_send_mlme_event(rdev, netdev, buf, len, 6178 NL80211_CMD_DISASSOCIATE, gfp); 6179 } 6180 6181 void nl80211_send_unprot_deauth(struct cfg80211_registered_device *rdev, 6182 struct net_device *netdev, const u8 *buf, 6183 size_t len, gfp_t gfp) 6184 { 6185 nl80211_send_mlme_event(rdev, netdev, buf, len, 6186 NL80211_CMD_UNPROT_DEAUTHENTICATE, gfp); 6187 } 6188 6189 void nl80211_send_unprot_disassoc(struct cfg80211_registered_device *rdev, 6190 struct net_device *netdev, const u8 *buf, 6191 size_t len, gfp_t gfp) 6192 { 6193 nl80211_send_mlme_event(rdev, netdev, buf, len, 6194 NL80211_CMD_UNPROT_DISASSOCIATE, gfp); 6195 } 6196 6197 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev, 6198 struct net_device *netdev, int cmd, 6199 const u8 *addr, gfp_t gfp) 6200 { 6201 struct sk_buff *msg; 6202 void *hdr; 6203 6204 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp); 6205 if (!msg) 6206 return; 6207 6208 hdr = nl80211hdr_put(msg, 0, 0, 0, cmd); 6209 if (!hdr) { 6210 nlmsg_free(msg); 6211 return; 6212 } 6213 6214 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx); 6215 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex); 6216 NLA_PUT_FLAG(msg, NL80211_ATTR_TIMED_OUT); 6217 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr); 6218 6219 if (genlmsg_end(msg, hdr) < 0) { 6220 nlmsg_free(msg); 6221 return; 6222 } 6223 6224 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0, 6225 nl80211_mlme_mcgrp.id, gfp); 6226 return; 6227 6228 nla_put_failure: 6229 genlmsg_cancel(msg, hdr); 6230 nlmsg_free(msg); 6231 } 6232 6233 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev, 6234 struct net_device *netdev, const u8 *addr, 6235 gfp_t gfp) 6236 { 6237 nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE, 6238 addr, gfp); 6239 } 6240 6241 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev, 6242 struct net_device *netdev, const u8 *addr, 6243 gfp_t gfp) 6244 { 6245 nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE, 6246 addr, gfp); 6247 } 6248 6249 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev, 6250 struct net_device *netdev, const u8 *bssid, 6251 const u8 *req_ie, size_t req_ie_len, 6252 const u8 *resp_ie, size_t resp_ie_len, 6253 u16 status, gfp_t gfp) 6254 { 6255 struct sk_buff *msg; 6256 void *hdr; 6257 6258 msg = nlmsg_new(NLMSG_GOODSIZE, gfp); 6259 if (!msg) 6260 return; 6261 6262 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT); 6263 if (!hdr) { 6264 nlmsg_free(msg); 6265 return; 6266 } 6267 6268 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx); 6269 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex); 6270 if (bssid) 6271 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid); 6272 NLA_PUT_U16(msg, NL80211_ATTR_STATUS_CODE, status); 6273 if (req_ie) 6274 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie); 6275 if (resp_ie) 6276 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie); 6277 6278 if (genlmsg_end(msg, hdr) < 0) { 6279 nlmsg_free(msg); 6280 return; 6281 } 6282 6283 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0, 6284 nl80211_mlme_mcgrp.id, gfp); 6285 return; 6286 6287 nla_put_failure: 6288 genlmsg_cancel(msg, hdr); 6289 nlmsg_free(msg); 6290 6291 } 6292 6293 void nl80211_send_roamed(struct cfg80211_registered_device *rdev, 6294 struct net_device *netdev, const u8 *bssid, 6295 const u8 *req_ie, size_t req_ie_len, 6296 const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp) 6297 { 6298 struct sk_buff *msg; 6299 void *hdr; 6300 6301 msg = nlmsg_new(NLMSG_GOODSIZE, gfp); 6302 if (!msg) 6303 return; 6304 6305 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM); 6306 if (!hdr) { 6307 nlmsg_free(msg); 6308 return; 6309 } 6310 6311 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx); 6312 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex); 6313 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid); 6314 if (req_ie) 6315 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie); 6316 if (resp_ie) 6317 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie); 6318 6319 if (genlmsg_end(msg, hdr) < 0) { 6320 nlmsg_free(msg); 6321 return; 6322 } 6323 6324 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0, 6325 nl80211_mlme_mcgrp.id, gfp); 6326 return; 6327 6328 nla_put_failure: 6329 genlmsg_cancel(msg, hdr); 6330 nlmsg_free(msg); 6331 6332 } 6333 6334 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev, 6335 struct net_device *netdev, u16 reason, 6336 const u8 *ie, size_t ie_len, bool from_ap) 6337 { 6338 struct sk_buff *msg; 6339 void *hdr; 6340 6341 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); 6342 if (!msg) 6343 return; 6344 6345 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT); 6346 if (!hdr) { 6347 nlmsg_free(msg); 6348 return; 6349 } 6350 6351 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx); 6352 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex); 6353 if (from_ap && reason) 6354 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason); 6355 if (from_ap) 6356 NLA_PUT_FLAG(msg, NL80211_ATTR_DISCONNECTED_BY_AP); 6357 if (ie) 6358 NLA_PUT(msg, NL80211_ATTR_IE, ie_len, ie); 6359 6360 if (genlmsg_end(msg, hdr) < 0) { 6361 nlmsg_free(msg); 6362 return; 6363 } 6364 6365 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0, 6366 nl80211_mlme_mcgrp.id, GFP_KERNEL); 6367 return; 6368 6369 nla_put_failure: 6370 genlmsg_cancel(msg, hdr); 6371 nlmsg_free(msg); 6372 6373 } 6374 6375 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev, 6376 struct net_device *netdev, const u8 *bssid, 6377 gfp_t gfp) 6378 { 6379 struct sk_buff *msg; 6380 void *hdr; 6381 6382 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp); 6383 if (!msg) 6384 return; 6385 6386 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS); 6387 if (!hdr) { 6388 nlmsg_free(msg); 6389 return; 6390 } 6391 6392 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx); 6393 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex); 6394 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid); 6395 6396 if (genlmsg_end(msg, hdr) < 0) { 6397 nlmsg_free(msg); 6398 return; 6399 } 6400 6401 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0, 6402 nl80211_mlme_mcgrp.id, gfp); 6403 return; 6404 6405 nla_put_failure: 6406 genlmsg_cancel(msg, hdr); 6407 nlmsg_free(msg); 6408 } 6409 6410 void nl80211_send_new_peer_candidate(struct cfg80211_registered_device *rdev, 6411 struct net_device *netdev, 6412 const u8 *macaddr, const u8* ie, u8 ie_len, 6413 gfp_t gfp) 6414 { 6415 struct sk_buff *msg; 6416 void *hdr; 6417 6418 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp); 6419 if (!msg) 6420 return; 6421 6422 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE); 6423 if (!hdr) { 6424 nlmsg_free(msg); 6425 return; 6426 } 6427 6428 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx); 6429 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex); 6430 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, macaddr); 6431 if (ie_len && ie) 6432 NLA_PUT(msg, NL80211_ATTR_IE, ie_len , ie); 6433 6434 if (genlmsg_end(msg, hdr) < 0) { 6435 nlmsg_free(msg); 6436 return; 6437 } 6438 6439 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0, 6440 nl80211_mlme_mcgrp.id, gfp); 6441 return; 6442 6443 nla_put_failure: 6444 genlmsg_cancel(msg, hdr); 6445 nlmsg_free(msg); 6446 } 6447 6448 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev, 6449 struct net_device *netdev, const u8 *addr, 6450 enum nl80211_key_type key_type, int key_id, 6451 const u8 *tsc, gfp_t gfp) 6452 { 6453 struct sk_buff *msg; 6454 void *hdr; 6455 6456 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp); 6457 if (!msg) 6458 return; 6459 6460 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE); 6461 if (!hdr) { 6462 nlmsg_free(msg); 6463 return; 6464 } 6465 6466 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx); 6467 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex); 6468 if (addr) 6469 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr); 6470 NLA_PUT_U32(msg, NL80211_ATTR_KEY_TYPE, key_type); 6471 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_id); 6472 if (tsc) 6473 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, 6, tsc); 6474 6475 if (genlmsg_end(msg, hdr) < 0) { 6476 nlmsg_free(msg); 6477 return; 6478 } 6479 6480 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0, 6481 nl80211_mlme_mcgrp.id, gfp); 6482 return; 6483 6484 nla_put_failure: 6485 genlmsg_cancel(msg, hdr); 6486 nlmsg_free(msg); 6487 } 6488 6489 void nl80211_send_beacon_hint_event(struct wiphy *wiphy, 6490 struct ieee80211_channel *channel_before, 6491 struct ieee80211_channel *channel_after) 6492 { 6493 struct sk_buff *msg; 6494 void *hdr; 6495 struct nlattr *nl_freq; 6496 6497 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); 6498 if (!msg) 6499 return; 6500 6501 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT); 6502 if (!hdr) { 6503 nlmsg_free(msg); 6504 return; 6505 } 6506 6507 /* 6508 * Since we are applying the beacon hint to a wiphy we know its 6509 * wiphy_idx is valid 6510 */ 6511 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)); 6512 6513 /* Before */ 6514 nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE); 6515 if (!nl_freq) 6516 goto nla_put_failure; 6517 if (nl80211_msg_put_channel(msg, channel_before)) 6518 goto nla_put_failure; 6519 nla_nest_end(msg, nl_freq); 6520 6521 /* After */ 6522 nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER); 6523 if (!nl_freq) 6524 goto nla_put_failure; 6525 if (nl80211_msg_put_channel(msg, channel_after)) 6526 goto nla_put_failure; 6527 nla_nest_end(msg, nl_freq); 6528 6529 if (genlmsg_end(msg, hdr) < 0) { 6530 nlmsg_free(msg); 6531 return; 6532 } 6533 6534 rcu_read_lock(); 6535 genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id, 6536 GFP_ATOMIC); 6537 rcu_read_unlock(); 6538 6539 return; 6540 6541 nla_put_failure: 6542 genlmsg_cancel(msg, hdr); 6543 nlmsg_free(msg); 6544 } 6545 6546 static void nl80211_send_remain_on_chan_event( 6547 int cmd, struct cfg80211_registered_device *rdev, 6548 struct net_device *netdev, u64 cookie, 6549 struct ieee80211_channel *chan, 6550 enum nl80211_channel_type channel_type, 6551 unsigned int duration, gfp_t gfp) 6552 { 6553 struct sk_buff *msg; 6554 void *hdr; 6555 6556 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp); 6557 if (!msg) 6558 return; 6559 6560 hdr = nl80211hdr_put(msg, 0, 0, 0, cmd); 6561 if (!hdr) { 6562 nlmsg_free(msg); 6563 return; 6564 } 6565 6566 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx); 6567 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex); 6568 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq); 6569 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, channel_type); 6570 NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie); 6571 6572 if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL) 6573 NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration); 6574 6575 if (genlmsg_end(msg, hdr) < 0) { 6576 nlmsg_free(msg); 6577 return; 6578 } 6579 6580 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0, 6581 nl80211_mlme_mcgrp.id, gfp); 6582 return; 6583 6584 nla_put_failure: 6585 genlmsg_cancel(msg, hdr); 6586 nlmsg_free(msg); 6587 } 6588 6589 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev, 6590 struct net_device *netdev, u64 cookie, 6591 struct ieee80211_channel *chan, 6592 enum nl80211_channel_type channel_type, 6593 unsigned int duration, gfp_t gfp) 6594 { 6595 nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL, 6596 rdev, netdev, cookie, chan, 6597 channel_type, duration, gfp); 6598 } 6599 6600 void nl80211_send_remain_on_channel_cancel( 6601 struct cfg80211_registered_device *rdev, struct net_device *netdev, 6602 u64 cookie, struct ieee80211_channel *chan, 6603 enum nl80211_channel_type channel_type, gfp_t gfp) 6604 { 6605 nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL, 6606 rdev, netdev, cookie, chan, 6607 channel_type, 0, gfp); 6608 } 6609 6610 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev, 6611 struct net_device *dev, const u8 *mac_addr, 6612 struct station_info *sinfo, gfp_t gfp) 6613 { 6614 struct sk_buff *msg; 6615 6616 msg = nlmsg_new(NLMSG_GOODSIZE, gfp); 6617 if (!msg) 6618 return; 6619 6620 if (nl80211_send_station(msg, 0, 0, 0, dev, mac_addr, sinfo) < 0) { 6621 nlmsg_free(msg); 6622 return; 6623 } 6624 6625 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0, 6626 nl80211_mlme_mcgrp.id, gfp); 6627 } 6628 6629 void nl80211_send_sta_del_event(struct cfg80211_registered_device *rdev, 6630 struct net_device *dev, const u8 *mac_addr, 6631 gfp_t gfp) 6632 { 6633 struct sk_buff *msg; 6634 void *hdr; 6635 6636 msg = nlmsg_new(NLMSG_GOODSIZE, gfp); 6637 if (!msg) 6638 return; 6639 6640 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION); 6641 if (!hdr) { 6642 nlmsg_free(msg); 6643 return; 6644 } 6645 6646 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex); 6647 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr); 6648 6649 if (genlmsg_end(msg, hdr) < 0) { 6650 nlmsg_free(msg); 6651 return; 6652 } 6653 6654 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0, 6655 nl80211_mlme_mcgrp.id, gfp); 6656 return; 6657 6658 nla_put_failure: 6659 genlmsg_cancel(msg, hdr); 6660 nlmsg_free(msg); 6661 } 6662 6663 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev, 6664 struct net_device *netdev, u32 nlpid, 6665 int freq, const u8 *buf, size_t len, gfp_t gfp) 6666 { 6667 struct sk_buff *msg; 6668 void *hdr; 6669 int err; 6670 6671 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp); 6672 if (!msg) 6673 return -ENOMEM; 6674 6675 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME); 6676 if (!hdr) { 6677 nlmsg_free(msg); 6678 return -ENOMEM; 6679 } 6680 6681 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx); 6682 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex); 6683 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq); 6684 NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf); 6685 6686 err = genlmsg_end(msg, hdr); 6687 if (err < 0) { 6688 nlmsg_free(msg); 6689 return err; 6690 } 6691 6692 err = genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid); 6693 if (err < 0) 6694 return err; 6695 return 0; 6696 6697 nla_put_failure: 6698 genlmsg_cancel(msg, hdr); 6699 nlmsg_free(msg); 6700 return -ENOBUFS; 6701 } 6702 6703 void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev, 6704 struct net_device *netdev, u64 cookie, 6705 const u8 *buf, size_t len, bool ack, 6706 gfp_t gfp) 6707 { 6708 struct sk_buff *msg; 6709 void *hdr; 6710 6711 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp); 6712 if (!msg) 6713 return; 6714 6715 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS); 6716 if (!hdr) { 6717 nlmsg_free(msg); 6718 return; 6719 } 6720 6721 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx); 6722 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex); 6723 NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf); 6724 NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie); 6725 if (ack) 6726 NLA_PUT_FLAG(msg, NL80211_ATTR_ACK); 6727 6728 if (genlmsg_end(msg, hdr) < 0) { 6729 nlmsg_free(msg); 6730 return; 6731 } 6732 6733 genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp); 6734 return; 6735 6736 nla_put_failure: 6737 genlmsg_cancel(msg, hdr); 6738 nlmsg_free(msg); 6739 } 6740 6741 void 6742 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev, 6743 struct net_device *netdev, 6744 enum nl80211_cqm_rssi_threshold_event rssi_event, 6745 gfp_t gfp) 6746 { 6747 struct sk_buff *msg; 6748 struct nlattr *pinfoattr; 6749 void *hdr; 6750 6751 msg = nlmsg_new(NLMSG_GOODSIZE, gfp); 6752 if (!msg) 6753 return; 6754 6755 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM); 6756 if (!hdr) { 6757 nlmsg_free(msg); 6758 return; 6759 } 6760 6761 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx); 6762 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex); 6763 6764 pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM); 6765 if (!pinfoattr) 6766 goto nla_put_failure; 6767 6768 NLA_PUT_U32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT, 6769 rssi_event); 6770 6771 nla_nest_end(msg, pinfoattr); 6772 6773 if (genlmsg_end(msg, hdr) < 0) { 6774 nlmsg_free(msg); 6775 return; 6776 } 6777 6778 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0, 6779 nl80211_mlme_mcgrp.id, gfp); 6780 return; 6781 6782 nla_put_failure: 6783 genlmsg_cancel(msg, hdr); 6784 nlmsg_free(msg); 6785 } 6786 6787 void 6788 nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev, 6789 struct net_device *netdev, const u8 *peer, 6790 u32 num_packets, gfp_t gfp) 6791 { 6792 struct sk_buff *msg; 6793 struct nlattr *pinfoattr; 6794 void *hdr; 6795 6796 msg = nlmsg_new(NLMSG_GOODSIZE, gfp); 6797 if (!msg) 6798 return; 6799 6800 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM); 6801 if (!hdr) { 6802 nlmsg_free(msg); 6803 return; 6804 } 6805 6806 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx); 6807 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex); 6808 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, peer); 6809 6810 pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM); 6811 if (!pinfoattr) 6812 goto nla_put_failure; 6813 6814 NLA_PUT_U32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets); 6815 6816 nla_nest_end(msg, pinfoattr); 6817 6818 if (genlmsg_end(msg, hdr) < 0) { 6819 nlmsg_free(msg); 6820 return; 6821 } 6822 6823 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0, 6824 nl80211_mlme_mcgrp.id, gfp); 6825 return; 6826 6827 nla_put_failure: 6828 genlmsg_cancel(msg, hdr); 6829 nlmsg_free(msg); 6830 } 6831 6832 static int nl80211_netlink_notify(struct notifier_block * nb, 6833 unsigned long state, 6834 void *_notify) 6835 { 6836 struct netlink_notify *notify = _notify; 6837 struct cfg80211_registered_device *rdev; 6838 struct wireless_dev *wdev; 6839 6840 if (state != NETLINK_URELEASE) 6841 return NOTIFY_DONE; 6842 6843 rcu_read_lock(); 6844 6845 list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) 6846 list_for_each_entry_rcu(wdev, &rdev->netdev_list, list) 6847 cfg80211_mlme_unregister_socket(wdev, notify->pid); 6848 6849 rcu_read_unlock(); 6850 6851 return NOTIFY_DONE; 6852 } 6853 6854 static struct notifier_block nl80211_netlink_notifier = { 6855 .notifier_call = nl80211_netlink_notify, 6856 }; 6857 6858 /* initialisation/exit functions */ 6859 6860 int nl80211_init(void) 6861 { 6862 int err; 6863 6864 err = genl_register_family_with_ops(&nl80211_fam, 6865 nl80211_ops, ARRAY_SIZE(nl80211_ops)); 6866 if (err) 6867 return err; 6868 6869 err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp); 6870 if (err) 6871 goto err_out; 6872 6873 err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp); 6874 if (err) 6875 goto err_out; 6876 6877 err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp); 6878 if (err) 6879 goto err_out; 6880 6881 err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp); 6882 if (err) 6883 goto err_out; 6884 6885 #ifdef CONFIG_NL80211_TESTMODE 6886 err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp); 6887 if (err) 6888 goto err_out; 6889 #endif 6890 6891 err = netlink_register_notifier(&nl80211_netlink_notifier); 6892 if (err) 6893 goto err_out; 6894 6895 return 0; 6896 err_out: 6897 genl_unregister_family(&nl80211_fam); 6898 return err; 6899 } 6900 6901 void nl80211_exit(void) 6902 { 6903 netlink_unregister_notifier(&nl80211_netlink_notifier); 6904 genl_unregister_family(&nl80211_fam); 6905 } 6906