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 nlattr *attr; 3298 struct wiphy *wiphy; 3299 int err, tmp, n_ssids = 0, n_channels, i; 3300 enum ieee80211_band band; 3301 size_t ie_len; 3302 3303 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE])) 3304 return -EINVAL; 3305 3306 wiphy = &rdev->wiphy; 3307 3308 if (!rdev->ops->scan) 3309 return -EOPNOTSUPP; 3310 3311 if (rdev->scan_req) 3312 return -EBUSY; 3313 3314 if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) { 3315 n_channels = validate_scan_freqs( 3316 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]); 3317 if (!n_channels) 3318 return -EINVAL; 3319 } else { 3320 n_channels = 0; 3321 3322 for (band = 0; band < IEEE80211_NUM_BANDS; band++) 3323 if (wiphy->bands[band]) 3324 n_channels += wiphy->bands[band]->n_channels; 3325 } 3326 3327 if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) 3328 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) 3329 n_ssids++; 3330 3331 if (n_ssids > wiphy->max_scan_ssids) 3332 return -EINVAL; 3333 3334 if (info->attrs[NL80211_ATTR_IE]) 3335 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]); 3336 else 3337 ie_len = 0; 3338 3339 if (ie_len > wiphy->max_scan_ie_len) 3340 return -EINVAL; 3341 3342 request = kzalloc(sizeof(*request) 3343 + sizeof(*request->ssids) * n_ssids 3344 + sizeof(*request->channels) * n_channels 3345 + ie_len, GFP_KERNEL); 3346 if (!request) 3347 return -ENOMEM; 3348 3349 if (n_ssids) 3350 request->ssids = (void *)&request->channels[n_channels]; 3351 request->n_ssids = n_ssids; 3352 if (ie_len) { 3353 if (request->ssids) 3354 request->ie = (void *)(request->ssids + n_ssids); 3355 else 3356 request->ie = (void *)(request->channels + n_channels); 3357 } 3358 3359 i = 0; 3360 if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) { 3361 /* user specified, bail out if channel not found */ 3362 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) { 3363 struct ieee80211_channel *chan; 3364 3365 chan = ieee80211_get_channel(wiphy, nla_get_u32(attr)); 3366 3367 if (!chan) { 3368 err = -EINVAL; 3369 goto out_free; 3370 } 3371 3372 /* ignore disabled channels */ 3373 if (chan->flags & IEEE80211_CHAN_DISABLED) 3374 continue; 3375 3376 request->channels[i] = chan; 3377 i++; 3378 } 3379 } else { 3380 /* all channels */ 3381 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 3382 int j; 3383 if (!wiphy->bands[band]) 3384 continue; 3385 for (j = 0; j < wiphy->bands[band]->n_channels; j++) { 3386 struct ieee80211_channel *chan; 3387 3388 chan = &wiphy->bands[band]->channels[j]; 3389 3390 if (chan->flags & IEEE80211_CHAN_DISABLED) 3391 continue; 3392 3393 request->channels[i] = chan; 3394 i++; 3395 } 3396 } 3397 } 3398 3399 if (!i) { 3400 err = -EINVAL; 3401 goto out_free; 3402 } 3403 3404 request->n_channels = i; 3405 3406 i = 0; 3407 if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) { 3408 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) { 3409 if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) { 3410 err = -EINVAL; 3411 goto out_free; 3412 } 3413 request->ssids[i].ssid_len = nla_len(attr); 3414 memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr)); 3415 i++; 3416 } 3417 } 3418 3419 if (info->attrs[NL80211_ATTR_IE]) { 3420 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]); 3421 memcpy((void *)request->ie, 3422 nla_data(info->attrs[NL80211_ATTR_IE]), 3423 request->ie_len); 3424 } 3425 3426 request->dev = dev; 3427 request->wiphy = &rdev->wiphy; 3428 3429 rdev->scan_req = request; 3430 err = rdev->ops->scan(&rdev->wiphy, dev, request); 3431 3432 if (!err) { 3433 nl80211_send_scan_start(rdev, dev); 3434 dev_hold(dev); 3435 } else { 3436 out_free: 3437 rdev->scan_req = NULL; 3438 kfree(request); 3439 } 3440 3441 return err; 3442 } 3443 3444 static int nl80211_start_sched_scan(struct sk_buff *skb, 3445 struct genl_info *info) 3446 { 3447 struct cfg80211_sched_scan_request *request; 3448 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 3449 struct net_device *dev = info->user_ptr[1]; 3450 struct nlattr *attr; 3451 struct wiphy *wiphy; 3452 int err, tmp, n_ssids = 0, n_channels, i; 3453 u32 interval; 3454 enum ieee80211_band band; 3455 size_t ie_len; 3456 3457 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) || 3458 !rdev->ops->sched_scan_start) 3459 return -EOPNOTSUPP; 3460 3461 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE])) 3462 return -EINVAL; 3463 3464 if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]) 3465 return -EINVAL; 3466 3467 interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]); 3468 if (interval == 0) 3469 return -EINVAL; 3470 3471 wiphy = &rdev->wiphy; 3472 3473 if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) { 3474 n_channels = validate_scan_freqs( 3475 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]); 3476 if (!n_channels) 3477 return -EINVAL; 3478 } else { 3479 n_channels = 0; 3480 3481 for (band = 0; band < IEEE80211_NUM_BANDS; band++) 3482 if (wiphy->bands[band]) 3483 n_channels += wiphy->bands[band]->n_channels; 3484 } 3485 3486 if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) 3487 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], 3488 tmp) 3489 n_ssids++; 3490 3491 if (n_ssids > wiphy->max_scan_ssids) 3492 return -EINVAL; 3493 3494 if (info->attrs[NL80211_ATTR_IE]) 3495 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]); 3496 else 3497 ie_len = 0; 3498 3499 if (ie_len > wiphy->max_scan_ie_len) 3500 return -EINVAL; 3501 3502 mutex_lock(&rdev->sched_scan_mtx); 3503 3504 if (rdev->sched_scan_req) { 3505 err = -EINPROGRESS; 3506 goto out; 3507 } 3508 3509 request = kzalloc(sizeof(*request) 3510 + sizeof(*request->ssids) * n_ssids 3511 + sizeof(*request->channels) * n_channels 3512 + ie_len, GFP_KERNEL); 3513 if (!request) { 3514 err = -ENOMEM; 3515 goto out; 3516 } 3517 3518 if (n_ssids) 3519 request->ssids = (void *)&request->channels[n_channels]; 3520 request->n_ssids = n_ssids; 3521 if (ie_len) { 3522 if (request->ssids) 3523 request->ie = (void *)(request->ssids + n_ssids); 3524 else 3525 request->ie = (void *)(request->channels + n_channels); 3526 } 3527 3528 i = 0; 3529 if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) { 3530 /* user specified, bail out if channel not found */ 3531 nla_for_each_nested(attr, 3532 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], 3533 tmp) { 3534 struct ieee80211_channel *chan; 3535 3536 chan = ieee80211_get_channel(wiphy, nla_get_u32(attr)); 3537 3538 if (!chan) { 3539 err = -EINVAL; 3540 goto out_free; 3541 } 3542 3543 /* ignore disabled channels */ 3544 if (chan->flags & IEEE80211_CHAN_DISABLED) 3545 continue; 3546 3547 request->channels[i] = chan; 3548 i++; 3549 } 3550 } else { 3551 /* all channels */ 3552 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 3553 int j; 3554 if (!wiphy->bands[band]) 3555 continue; 3556 for (j = 0; j < wiphy->bands[band]->n_channels; j++) { 3557 struct ieee80211_channel *chan; 3558 3559 chan = &wiphy->bands[band]->channels[j]; 3560 3561 if (chan->flags & IEEE80211_CHAN_DISABLED) 3562 continue; 3563 3564 request->channels[i] = chan; 3565 i++; 3566 } 3567 } 3568 } 3569 3570 if (!i) { 3571 err = -EINVAL; 3572 goto out_free; 3573 } 3574 3575 request->n_channels = i; 3576 3577 i = 0; 3578 if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) { 3579 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], 3580 tmp) { 3581 if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) { 3582 err = -EINVAL; 3583 goto out_free; 3584 } 3585 request->ssids[i].ssid_len = nla_len(attr); 3586 memcpy(request->ssids[i].ssid, nla_data(attr), 3587 nla_len(attr)); 3588 i++; 3589 } 3590 } 3591 3592 if (info->attrs[NL80211_ATTR_IE]) { 3593 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]); 3594 memcpy((void *)request->ie, 3595 nla_data(info->attrs[NL80211_ATTR_IE]), 3596 request->ie_len); 3597 } 3598 3599 request->dev = dev; 3600 request->wiphy = &rdev->wiphy; 3601 request->interval = interval; 3602 3603 err = rdev->ops->sched_scan_start(&rdev->wiphy, dev, request); 3604 if (!err) { 3605 rdev->sched_scan_req = request; 3606 nl80211_send_sched_scan(rdev, dev, 3607 NL80211_CMD_START_SCHED_SCAN); 3608 goto out; 3609 } 3610 3611 out_free: 3612 kfree(request); 3613 out: 3614 mutex_unlock(&rdev->sched_scan_mtx); 3615 return err; 3616 } 3617 3618 static int nl80211_stop_sched_scan(struct sk_buff *skb, 3619 struct genl_info *info) 3620 { 3621 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 3622 int err; 3623 3624 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) || 3625 !rdev->ops->sched_scan_stop) 3626 return -EOPNOTSUPP; 3627 3628 mutex_lock(&rdev->sched_scan_mtx); 3629 err = __cfg80211_stop_sched_scan(rdev, false); 3630 mutex_unlock(&rdev->sched_scan_mtx); 3631 3632 return err; 3633 } 3634 3635 static int nl80211_send_bss(struct sk_buff *msg, u32 pid, u32 seq, int flags, 3636 struct cfg80211_registered_device *rdev, 3637 struct wireless_dev *wdev, 3638 struct cfg80211_internal_bss *intbss) 3639 { 3640 struct cfg80211_bss *res = &intbss->pub; 3641 void *hdr; 3642 struct nlattr *bss; 3643 int i; 3644 3645 ASSERT_WDEV_LOCK(wdev); 3646 3647 hdr = nl80211hdr_put(msg, pid, seq, flags, 3648 NL80211_CMD_NEW_SCAN_RESULTS); 3649 if (!hdr) 3650 return -1; 3651 3652 NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation); 3653 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex); 3654 3655 bss = nla_nest_start(msg, NL80211_ATTR_BSS); 3656 if (!bss) 3657 goto nla_put_failure; 3658 if (!is_zero_ether_addr(res->bssid)) 3659 NLA_PUT(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid); 3660 if (res->information_elements && res->len_information_elements) 3661 NLA_PUT(msg, NL80211_BSS_INFORMATION_ELEMENTS, 3662 res->len_information_elements, 3663 res->information_elements); 3664 if (res->beacon_ies && res->len_beacon_ies && 3665 res->beacon_ies != res->information_elements) 3666 NLA_PUT(msg, NL80211_BSS_BEACON_IES, 3667 res->len_beacon_ies, res->beacon_ies); 3668 if (res->tsf) 3669 NLA_PUT_U64(msg, NL80211_BSS_TSF, res->tsf); 3670 if (res->beacon_interval) 3671 NLA_PUT_U16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval); 3672 NLA_PUT_U16(msg, NL80211_BSS_CAPABILITY, res->capability); 3673 NLA_PUT_U32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq); 3674 NLA_PUT_U32(msg, NL80211_BSS_SEEN_MS_AGO, 3675 jiffies_to_msecs(jiffies - intbss->ts)); 3676 3677 switch (rdev->wiphy.signal_type) { 3678 case CFG80211_SIGNAL_TYPE_MBM: 3679 NLA_PUT_U32(msg, NL80211_BSS_SIGNAL_MBM, res->signal); 3680 break; 3681 case CFG80211_SIGNAL_TYPE_UNSPEC: 3682 NLA_PUT_U8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal); 3683 break; 3684 default: 3685 break; 3686 } 3687 3688 switch (wdev->iftype) { 3689 case NL80211_IFTYPE_P2P_CLIENT: 3690 case NL80211_IFTYPE_STATION: 3691 if (intbss == wdev->current_bss) 3692 NLA_PUT_U32(msg, NL80211_BSS_STATUS, 3693 NL80211_BSS_STATUS_ASSOCIATED); 3694 else for (i = 0; i < MAX_AUTH_BSSES; i++) { 3695 if (intbss != wdev->auth_bsses[i]) 3696 continue; 3697 NLA_PUT_U32(msg, NL80211_BSS_STATUS, 3698 NL80211_BSS_STATUS_AUTHENTICATED); 3699 break; 3700 } 3701 break; 3702 case NL80211_IFTYPE_ADHOC: 3703 if (intbss == wdev->current_bss) 3704 NLA_PUT_U32(msg, NL80211_BSS_STATUS, 3705 NL80211_BSS_STATUS_IBSS_JOINED); 3706 break; 3707 default: 3708 break; 3709 } 3710 3711 nla_nest_end(msg, bss); 3712 3713 return genlmsg_end(msg, hdr); 3714 3715 nla_put_failure: 3716 genlmsg_cancel(msg, hdr); 3717 return -EMSGSIZE; 3718 } 3719 3720 static int nl80211_dump_scan(struct sk_buff *skb, 3721 struct netlink_callback *cb) 3722 { 3723 struct cfg80211_registered_device *rdev; 3724 struct net_device *dev; 3725 struct cfg80211_internal_bss *scan; 3726 struct wireless_dev *wdev; 3727 int start = cb->args[1], idx = 0; 3728 int err; 3729 3730 err = nl80211_prepare_netdev_dump(skb, cb, &rdev, &dev); 3731 if (err) 3732 return err; 3733 3734 wdev = dev->ieee80211_ptr; 3735 3736 wdev_lock(wdev); 3737 spin_lock_bh(&rdev->bss_lock); 3738 cfg80211_bss_expire(rdev); 3739 3740 list_for_each_entry(scan, &rdev->bss_list, list) { 3741 if (++idx <= start) 3742 continue; 3743 if (nl80211_send_bss(skb, 3744 NETLINK_CB(cb->skb).pid, 3745 cb->nlh->nlmsg_seq, NLM_F_MULTI, 3746 rdev, wdev, scan) < 0) { 3747 idx--; 3748 break; 3749 } 3750 } 3751 3752 spin_unlock_bh(&rdev->bss_lock); 3753 wdev_unlock(wdev); 3754 3755 cb->args[1] = idx; 3756 nl80211_finish_netdev_dump(rdev); 3757 3758 return skb->len; 3759 } 3760 3761 static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq, 3762 int flags, struct net_device *dev, 3763 struct survey_info *survey) 3764 { 3765 void *hdr; 3766 struct nlattr *infoattr; 3767 3768 /* Survey without a channel doesn't make sense */ 3769 if (!survey->channel) 3770 return -EINVAL; 3771 3772 hdr = nl80211hdr_put(msg, pid, seq, flags, 3773 NL80211_CMD_NEW_SURVEY_RESULTS); 3774 if (!hdr) 3775 return -ENOMEM; 3776 3777 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex); 3778 3779 infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO); 3780 if (!infoattr) 3781 goto nla_put_failure; 3782 3783 NLA_PUT_U32(msg, NL80211_SURVEY_INFO_FREQUENCY, 3784 survey->channel->center_freq); 3785 if (survey->filled & SURVEY_INFO_NOISE_DBM) 3786 NLA_PUT_U8(msg, NL80211_SURVEY_INFO_NOISE, 3787 survey->noise); 3788 if (survey->filled & SURVEY_INFO_IN_USE) 3789 NLA_PUT_FLAG(msg, NL80211_SURVEY_INFO_IN_USE); 3790 if (survey->filled & SURVEY_INFO_CHANNEL_TIME) 3791 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME, 3792 survey->channel_time); 3793 if (survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY) 3794 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY, 3795 survey->channel_time_busy); 3796 if (survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY) 3797 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY, 3798 survey->channel_time_ext_busy); 3799 if (survey->filled & SURVEY_INFO_CHANNEL_TIME_RX) 3800 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX, 3801 survey->channel_time_rx); 3802 if (survey->filled & SURVEY_INFO_CHANNEL_TIME_TX) 3803 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX, 3804 survey->channel_time_tx); 3805 3806 nla_nest_end(msg, infoattr); 3807 3808 return genlmsg_end(msg, hdr); 3809 3810 nla_put_failure: 3811 genlmsg_cancel(msg, hdr); 3812 return -EMSGSIZE; 3813 } 3814 3815 static int nl80211_dump_survey(struct sk_buff *skb, 3816 struct netlink_callback *cb) 3817 { 3818 struct survey_info survey; 3819 struct cfg80211_registered_device *dev; 3820 struct net_device *netdev; 3821 int survey_idx = cb->args[1]; 3822 int res; 3823 3824 res = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev); 3825 if (res) 3826 return res; 3827 3828 if (!dev->ops->dump_survey) { 3829 res = -EOPNOTSUPP; 3830 goto out_err; 3831 } 3832 3833 while (1) { 3834 res = dev->ops->dump_survey(&dev->wiphy, netdev, survey_idx, 3835 &survey); 3836 if (res == -ENOENT) 3837 break; 3838 if (res) 3839 goto out_err; 3840 3841 if (nl80211_send_survey(skb, 3842 NETLINK_CB(cb->skb).pid, 3843 cb->nlh->nlmsg_seq, NLM_F_MULTI, 3844 netdev, 3845 &survey) < 0) 3846 goto out; 3847 survey_idx++; 3848 } 3849 3850 out: 3851 cb->args[1] = survey_idx; 3852 res = skb->len; 3853 out_err: 3854 nl80211_finish_netdev_dump(dev); 3855 return res; 3856 } 3857 3858 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type) 3859 { 3860 return auth_type <= NL80211_AUTHTYPE_MAX; 3861 } 3862 3863 static bool nl80211_valid_wpa_versions(u32 wpa_versions) 3864 { 3865 return !(wpa_versions & ~(NL80211_WPA_VERSION_1 | 3866 NL80211_WPA_VERSION_2)); 3867 } 3868 3869 static bool nl80211_valid_akm_suite(u32 akm) 3870 { 3871 return akm == WLAN_AKM_SUITE_8021X || 3872 akm == WLAN_AKM_SUITE_PSK; 3873 } 3874 3875 static bool nl80211_valid_cipher_suite(u32 cipher) 3876 { 3877 return cipher == WLAN_CIPHER_SUITE_WEP40 || 3878 cipher == WLAN_CIPHER_SUITE_WEP104 || 3879 cipher == WLAN_CIPHER_SUITE_TKIP || 3880 cipher == WLAN_CIPHER_SUITE_CCMP || 3881 cipher == WLAN_CIPHER_SUITE_AES_CMAC; 3882 } 3883 3884 3885 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info) 3886 { 3887 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 3888 struct net_device *dev = info->user_ptr[1]; 3889 struct ieee80211_channel *chan; 3890 const u8 *bssid, *ssid, *ie = NULL; 3891 int err, ssid_len, ie_len = 0; 3892 enum nl80211_auth_type auth_type; 3893 struct key_parse key; 3894 bool local_state_change; 3895 3896 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE])) 3897 return -EINVAL; 3898 3899 if (!info->attrs[NL80211_ATTR_MAC]) 3900 return -EINVAL; 3901 3902 if (!info->attrs[NL80211_ATTR_AUTH_TYPE]) 3903 return -EINVAL; 3904 3905 if (!info->attrs[NL80211_ATTR_SSID]) 3906 return -EINVAL; 3907 3908 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ]) 3909 return -EINVAL; 3910 3911 err = nl80211_parse_key(info, &key); 3912 if (err) 3913 return err; 3914 3915 if (key.idx >= 0) { 3916 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP) 3917 return -EINVAL; 3918 if (!key.p.key || !key.p.key_len) 3919 return -EINVAL; 3920 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 || 3921 key.p.key_len != WLAN_KEY_LEN_WEP40) && 3922 (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 || 3923 key.p.key_len != WLAN_KEY_LEN_WEP104)) 3924 return -EINVAL; 3925 if (key.idx > 4) 3926 return -EINVAL; 3927 } else { 3928 key.p.key_len = 0; 3929 key.p.key = NULL; 3930 } 3931 3932 if (key.idx >= 0) { 3933 int i; 3934 bool ok = false; 3935 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) { 3936 if (key.p.cipher == rdev->wiphy.cipher_suites[i]) { 3937 ok = true; 3938 break; 3939 } 3940 } 3941 if (!ok) 3942 return -EINVAL; 3943 } 3944 3945 if (!rdev->ops->auth) 3946 return -EOPNOTSUPP; 3947 3948 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION && 3949 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT) 3950 return -EOPNOTSUPP; 3951 3952 bssid = nla_data(info->attrs[NL80211_ATTR_MAC]); 3953 chan = ieee80211_get_channel(&rdev->wiphy, 3954 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ])); 3955 if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED)) 3956 return -EINVAL; 3957 3958 ssid = nla_data(info->attrs[NL80211_ATTR_SSID]); 3959 ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]); 3960 3961 if (info->attrs[NL80211_ATTR_IE]) { 3962 ie = nla_data(info->attrs[NL80211_ATTR_IE]); 3963 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]); 3964 } 3965 3966 auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]); 3967 if (!nl80211_valid_auth_type(auth_type)) 3968 return -EINVAL; 3969 3970 local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE]; 3971 3972 return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid, 3973 ssid, ssid_len, ie, ie_len, 3974 key.p.key, key.p.key_len, key.idx, 3975 local_state_change); 3976 } 3977 3978 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev, 3979 struct genl_info *info, 3980 struct cfg80211_crypto_settings *settings, 3981 int cipher_limit) 3982 { 3983 memset(settings, 0, sizeof(*settings)); 3984 3985 settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT]; 3986 3987 if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) { 3988 u16 proto; 3989 proto = nla_get_u16( 3990 info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]); 3991 settings->control_port_ethertype = cpu_to_be16(proto); 3992 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) && 3993 proto != ETH_P_PAE) 3994 return -EINVAL; 3995 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT]) 3996 settings->control_port_no_encrypt = true; 3997 } else 3998 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE); 3999 4000 if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) { 4001 void *data; 4002 int len, i; 4003 4004 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]); 4005 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]); 4006 settings->n_ciphers_pairwise = len / sizeof(u32); 4007 4008 if (len % sizeof(u32)) 4009 return -EINVAL; 4010 4011 if (settings->n_ciphers_pairwise > cipher_limit) 4012 return -EINVAL; 4013 4014 memcpy(settings->ciphers_pairwise, data, len); 4015 4016 for (i = 0; i < settings->n_ciphers_pairwise; i++) 4017 if (!nl80211_valid_cipher_suite( 4018 settings->ciphers_pairwise[i])) 4019 return -EINVAL; 4020 } 4021 4022 if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) { 4023 settings->cipher_group = 4024 nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]); 4025 if (!nl80211_valid_cipher_suite(settings->cipher_group)) 4026 return -EINVAL; 4027 } 4028 4029 if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) { 4030 settings->wpa_versions = 4031 nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]); 4032 if (!nl80211_valid_wpa_versions(settings->wpa_versions)) 4033 return -EINVAL; 4034 } 4035 4036 if (info->attrs[NL80211_ATTR_AKM_SUITES]) { 4037 void *data; 4038 int len, i; 4039 4040 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]); 4041 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]); 4042 settings->n_akm_suites = len / sizeof(u32); 4043 4044 if (len % sizeof(u32)) 4045 return -EINVAL; 4046 4047 memcpy(settings->akm_suites, data, len); 4048 4049 for (i = 0; i < settings->n_ciphers_pairwise; i++) 4050 if (!nl80211_valid_akm_suite(settings->akm_suites[i])) 4051 return -EINVAL; 4052 } 4053 4054 return 0; 4055 } 4056 4057 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info) 4058 { 4059 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 4060 struct net_device *dev = info->user_ptr[1]; 4061 struct cfg80211_crypto_settings crypto; 4062 struct ieee80211_channel *chan; 4063 const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL; 4064 int err, ssid_len, ie_len = 0; 4065 bool use_mfp = false; 4066 4067 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE])) 4068 return -EINVAL; 4069 4070 if (!info->attrs[NL80211_ATTR_MAC] || 4071 !info->attrs[NL80211_ATTR_SSID] || 4072 !info->attrs[NL80211_ATTR_WIPHY_FREQ]) 4073 return -EINVAL; 4074 4075 if (!rdev->ops->assoc) 4076 return -EOPNOTSUPP; 4077 4078 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION && 4079 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT) 4080 return -EOPNOTSUPP; 4081 4082 bssid = nla_data(info->attrs[NL80211_ATTR_MAC]); 4083 4084 chan = ieee80211_get_channel(&rdev->wiphy, 4085 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ])); 4086 if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED)) 4087 return -EINVAL; 4088 4089 ssid = nla_data(info->attrs[NL80211_ATTR_SSID]); 4090 ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]); 4091 4092 if (info->attrs[NL80211_ATTR_IE]) { 4093 ie = nla_data(info->attrs[NL80211_ATTR_IE]); 4094 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]); 4095 } 4096 4097 if (info->attrs[NL80211_ATTR_USE_MFP]) { 4098 enum nl80211_mfp mfp = 4099 nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]); 4100 if (mfp == NL80211_MFP_REQUIRED) 4101 use_mfp = true; 4102 else if (mfp != NL80211_MFP_NO) 4103 return -EINVAL; 4104 } 4105 4106 if (info->attrs[NL80211_ATTR_PREV_BSSID]) 4107 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]); 4108 4109 err = nl80211_crypto_settings(rdev, info, &crypto, 1); 4110 if (!err) 4111 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid, 4112 ssid, ssid_len, ie, ie_len, use_mfp, 4113 &crypto); 4114 4115 return err; 4116 } 4117 4118 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info) 4119 { 4120 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 4121 struct net_device *dev = info->user_ptr[1]; 4122 const u8 *ie = NULL, *bssid; 4123 int ie_len = 0; 4124 u16 reason_code; 4125 bool local_state_change; 4126 4127 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE])) 4128 return -EINVAL; 4129 4130 if (!info->attrs[NL80211_ATTR_MAC]) 4131 return -EINVAL; 4132 4133 if (!info->attrs[NL80211_ATTR_REASON_CODE]) 4134 return -EINVAL; 4135 4136 if (!rdev->ops->deauth) 4137 return -EOPNOTSUPP; 4138 4139 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION && 4140 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT) 4141 return -EOPNOTSUPP; 4142 4143 bssid = nla_data(info->attrs[NL80211_ATTR_MAC]); 4144 4145 reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]); 4146 if (reason_code == 0) { 4147 /* Reason Code 0 is reserved */ 4148 return -EINVAL; 4149 } 4150 4151 if (info->attrs[NL80211_ATTR_IE]) { 4152 ie = nla_data(info->attrs[NL80211_ATTR_IE]); 4153 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]); 4154 } 4155 4156 local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE]; 4157 4158 return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code, 4159 local_state_change); 4160 } 4161 4162 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info) 4163 { 4164 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 4165 struct net_device *dev = info->user_ptr[1]; 4166 const u8 *ie = NULL, *bssid; 4167 int ie_len = 0; 4168 u16 reason_code; 4169 bool local_state_change; 4170 4171 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE])) 4172 return -EINVAL; 4173 4174 if (!info->attrs[NL80211_ATTR_MAC]) 4175 return -EINVAL; 4176 4177 if (!info->attrs[NL80211_ATTR_REASON_CODE]) 4178 return -EINVAL; 4179 4180 if (!rdev->ops->disassoc) 4181 return -EOPNOTSUPP; 4182 4183 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION && 4184 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT) 4185 return -EOPNOTSUPP; 4186 4187 bssid = nla_data(info->attrs[NL80211_ATTR_MAC]); 4188 4189 reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]); 4190 if (reason_code == 0) { 4191 /* Reason Code 0 is reserved */ 4192 return -EINVAL; 4193 } 4194 4195 if (info->attrs[NL80211_ATTR_IE]) { 4196 ie = nla_data(info->attrs[NL80211_ATTR_IE]); 4197 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]); 4198 } 4199 4200 local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE]; 4201 4202 return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code, 4203 local_state_change); 4204 } 4205 4206 static bool 4207 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev, 4208 int mcast_rate[IEEE80211_NUM_BANDS], 4209 int rateval) 4210 { 4211 struct wiphy *wiphy = &rdev->wiphy; 4212 bool found = false; 4213 int band, i; 4214 4215 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 4216 struct ieee80211_supported_band *sband; 4217 4218 sband = wiphy->bands[band]; 4219 if (!sband) 4220 continue; 4221 4222 for (i = 0; i < sband->n_bitrates; i++) { 4223 if (sband->bitrates[i].bitrate == rateval) { 4224 mcast_rate[band] = i + 1; 4225 found = true; 4226 break; 4227 } 4228 } 4229 } 4230 4231 return found; 4232 } 4233 4234 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info) 4235 { 4236 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 4237 struct net_device *dev = info->user_ptr[1]; 4238 struct cfg80211_ibss_params ibss; 4239 struct wiphy *wiphy; 4240 struct cfg80211_cached_keys *connkeys = NULL; 4241 int err; 4242 4243 memset(&ibss, 0, sizeof(ibss)); 4244 4245 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE])) 4246 return -EINVAL; 4247 4248 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] || 4249 !info->attrs[NL80211_ATTR_SSID] || 4250 !nla_len(info->attrs[NL80211_ATTR_SSID])) 4251 return -EINVAL; 4252 4253 ibss.beacon_interval = 100; 4254 4255 if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) { 4256 ibss.beacon_interval = 4257 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]); 4258 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000) 4259 return -EINVAL; 4260 } 4261 4262 if (!rdev->ops->join_ibss) 4263 return -EOPNOTSUPP; 4264 4265 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC) 4266 return -EOPNOTSUPP; 4267 4268 wiphy = &rdev->wiphy; 4269 4270 if (info->attrs[NL80211_ATTR_MAC]) 4271 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]); 4272 ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]); 4273 ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]); 4274 4275 if (info->attrs[NL80211_ATTR_IE]) { 4276 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]); 4277 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]); 4278 } 4279 4280 ibss.channel = ieee80211_get_channel(wiphy, 4281 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ])); 4282 if (!ibss.channel || 4283 ibss.channel->flags & IEEE80211_CHAN_NO_IBSS || 4284 ibss.channel->flags & IEEE80211_CHAN_DISABLED) 4285 return -EINVAL; 4286 4287 ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED]; 4288 ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY]; 4289 4290 if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) { 4291 u8 *rates = 4292 nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]); 4293 int n_rates = 4294 nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]); 4295 struct ieee80211_supported_band *sband = 4296 wiphy->bands[ibss.channel->band]; 4297 int i, j; 4298 4299 if (n_rates == 0) 4300 return -EINVAL; 4301 4302 for (i = 0; i < n_rates; i++) { 4303 int rate = (rates[i] & 0x7f) * 5; 4304 bool found = false; 4305 4306 for (j = 0; j < sband->n_bitrates; j++) { 4307 if (sband->bitrates[j].bitrate == rate) { 4308 found = true; 4309 ibss.basic_rates |= BIT(j); 4310 break; 4311 } 4312 } 4313 if (!found) 4314 return -EINVAL; 4315 } 4316 } 4317 4318 if (info->attrs[NL80211_ATTR_MCAST_RATE] && 4319 !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate, 4320 nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]))) 4321 return -EINVAL; 4322 4323 if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) { 4324 connkeys = nl80211_parse_connkeys(rdev, 4325 info->attrs[NL80211_ATTR_KEYS]); 4326 if (IS_ERR(connkeys)) 4327 return PTR_ERR(connkeys); 4328 } 4329 4330 err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys); 4331 if (err) 4332 kfree(connkeys); 4333 return err; 4334 } 4335 4336 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info) 4337 { 4338 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 4339 struct net_device *dev = info->user_ptr[1]; 4340 4341 if (!rdev->ops->leave_ibss) 4342 return -EOPNOTSUPP; 4343 4344 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC) 4345 return -EOPNOTSUPP; 4346 4347 return cfg80211_leave_ibss(rdev, dev, false); 4348 } 4349 4350 #ifdef CONFIG_NL80211_TESTMODE 4351 static struct genl_multicast_group nl80211_testmode_mcgrp = { 4352 .name = "testmode", 4353 }; 4354 4355 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info) 4356 { 4357 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 4358 int err; 4359 4360 if (!info->attrs[NL80211_ATTR_TESTDATA]) 4361 return -EINVAL; 4362 4363 err = -EOPNOTSUPP; 4364 if (rdev->ops->testmode_cmd) { 4365 rdev->testmode_info = info; 4366 err = rdev->ops->testmode_cmd(&rdev->wiphy, 4367 nla_data(info->attrs[NL80211_ATTR_TESTDATA]), 4368 nla_len(info->attrs[NL80211_ATTR_TESTDATA])); 4369 rdev->testmode_info = NULL; 4370 } 4371 4372 return err; 4373 } 4374 4375 static struct sk_buff * 4376 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev, 4377 int approxlen, u32 pid, u32 seq, gfp_t gfp) 4378 { 4379 struct sk_buff *skb; 4380 void *hdr; 4381 struct nlattr *data; 4382 4383 skb = nlmsg_new(approxlen + 100, gfp); 4384 if (!skb) 4385 return NULL; 4386 4387 hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE); 4388 if (!hdr) { 4389 kfree_skb(skb); 4390 return NULL; 4391 } 4392 4393 NLA_PUT_U32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx); 4394 data = nla_nest_start(skb, NL80211_ATTR_TESTDATA); 4395 4396 ((void **)skb->cb)[0] = rdev; 4397 ((void **)skb->cb)[1] = hdr; 4398 ((void **)skb->cb)[2] = data; 4399 4400 return skb; 4401 4402 nla_put_failure: 4403 kfree_skb(skb); 4404 return NULL; 4405 } 4406 4407 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy, 4408 int approxlen) 4409 { 4410 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); 4411 4412 if (WARN_ON(!rdev->testmode_info)) 4413 return NULL; 4414 4415 return __cfg80211_testmode_alloc_skb(rdev, approxlen, 4416 rdev->testmode_info->snd_pid, 4417 rdev->testmode_info->snd_seq, 4418 GFP_KERNEL); 4419 } 4420 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb); 4421 4422 int cfg80211_testmode_reply(struct sk_buff *skb) 4423 { 4424 struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0]; 4425 void *hdr = ((void **)skb->cb)[1]; 4426 struct nlattr *data = ((void **)skb->cb)[2]; 4427 4428 if (WARN_ON(!rdev->testmode_info)) { 4429 kfree_skb(skb); 4430 return -EINVAL; 4431 } 4432 4433 nla_nest_end(skb, data); 4434 genlmsg_end(skb, hdr); 4435 return genlmsg_reply(skb, rdev->testmode_info); 4436 } 4437 EXPORT_SYMBOL(cfg80211_testmode_reply); 4438 4439 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy, 4440 int approxlen, gfp_t gfp) 4441 { 4442 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); 4443 4444 return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp); 4445 } 4446 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb); 4447 4448 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp) 4449 { 4450 void *hdr = ((void **)skb->cb)[1]; 4451 struct nlattr *data = ((void **)skb->cb)[2]; 4452 4453 nla_nest_end(skb, data); 4454 genlmsg_end(skb, hdr); 4455 genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp); 4456 } 4457 EXPORT_SYMBOL(cfg80211_testmode_event); 4458 #endif 4459 4460 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info) 4461 { 4462 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 4463 struct net_device *dev = info->user_ptr[1]; 4464 struct cfg80211_connect_params connect; 4465 struct wiphy *wiphy; 4466 struct cfg80211_cached_keys *connkeys = NULL; 4467 int err; 4468 4469 memset(&connect, 0, sizeof(connect)); 4470 4471 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE])) 4472 return -EINVAL; 4473 4474 if (!info->attrs[NL80211_ATTR_SSID] || 4475 !nla_len(info->attrs[NL80211_ATTR_SSID])) 4476 return -EINVAL; 4477 4478 if (info->attrs[NL80211_ATTR_AUTH_TYPE]) { 4479 connect.auth_type = 4480 nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]); 4481 if (!nl80211_valid_auth_type(connect.auth_type)) 4482 return -EINVAL; 4483 } else 4484 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; 4485 4486 connect.privacy = info->attrs[NL80211_ATTR_PRIVACY]; 4487 4488 err = nl80211_crypto_settings(rdev, info, &connect.crypto, 4489 NL80211_MAX_NR_CIPHER_SUITES); 4490 if (err) 4491 return err; 4492 4493 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION && 4494 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT) 4495 return -EOPNOTSUPP; 4496 4497 wiphy = &rdev->wiphy; 4498 4499 if (info->attrs[NL80211_ATTR_MAC]) 4500 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]); 4501 connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]); 4502 connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]); 4503 4504 if (info->attrs[NL80211_ATTR_IE]) { 4505 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]); 4506 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]); 4507 } 4508 4509 if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) { 4510 connect.channel = 4511 ieee80211_get_channel(wiphy, 4512 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ])); 4513 if (!connect.channel || 4514 connect.channel->flags & IEEE80211_CHAN_DISABLED) 4515 return -EINVAL; 4516 } 4517 4518 if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) { 4519 connkeys = nl80211_parse_connkeys(rdev, 4520 info->attrs[NL80211_ATTR_KEYS]); 4521 if (IS_ERR(connkeys)) 4522 return PTR_ERR(connkeys); 4523 } 4524 4525 err = cfg80211_connect(rdev, dev, &connect, connkeys); 4526 if (err) 4527 kfree(connkeys); 4528 return err; 4529 } 4530 4531 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info) 4532 { 4533 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 4534 struct net_device *dev = info->user_ptr[1]; 4535 u16 reason; 4536 4537 if (!info->attrs[NL80211_ATTR_REASON_CODE]) 4538 reason = WLAN_REASON_DEAUTH_LEAVING; 4539 else 4540 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]); 4541 4542 if (reason == 0) 4543 return -EINVAL; 4544 4545 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION && 4546 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT) 4547 return -EOPNOTSUPP; 4548 4549 return cfg80211_disconnect(rdev, dev, reason, true); 4550 } 4551 4552 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info) 4553 { 4554 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 4555 struct net *net; 4556 int err; 4557 u32 pid; 4558 4559 if (!info->attrs[NL80211_ATTR_PID]) 4560 return -EINVAL; 4561 4562 pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]); 4563 4564 net = get_net_ns_by_pid(pid); 4565 if (IS_ERR(net)) 4566 return PTR_ERR(net); 4567 4568 err = 0; 4569 4570 /* check if anything to do */ 4571 if (!net_eq(wiphy_net(&rdev->wiphy), net)) 4572 err = cfg80211_switch_netns(rdev, net); 4573 4574 put_net(net); 4575 return err; 4576 } 4577 4578 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info) 4579 { 4580 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 4581 int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev, 4582 struct cfg80211_pmksa *pmksa) = NULL; 4583 struct net_device *dev = info->user_ptr[1]; 4584 struct cfg80211_pmksa pmksa; 4585 4586 memset(&pmksa, 0, sizeof(struct cfg80211_pmksa)); 4587 4588 if (!info->attrs[NL80211_ATTR_MAC]) 4589 return -EINVAL; 4590 4591 if (!info->attrs[NL80211_ATTR_PMKID]) 4592 return -EINVAL; 4593 4594 pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]); 4595 pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]); 4596 4597 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION && 4598 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT) 4599 return -EOPNOTSUPP; 4600 4601 switch (info->genlhdr->cmd) { 4602 case NL80211_CMD_SET_PMKSA: 4603 rdev_ops = rdev->ops->set_pmksa; 4604 break; 4605 case NL80211_CMD_DEL_PMKSA: 4606 rdev_ops = rdev->ops->del_pmksa; 4607 break; 4608 default: 4609 WARN_ON(1); 4610 break; 4611 } 4612 4613 if (!rdev_ops) 4614 return -EOPNOTSUPP; 4615 4616 return rdev_ops(&rdev->wiphy, dev, &pmksa); 4617 } 4618 4619 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info) 4620 { 4621 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 4622 struct net_device *dev = info->user_ptr[1]; 4623 4624 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION && 4625 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT) 4626 return -EOPNOTSUPP; 4627 4628 if (!rdev->ops->flush_pmksa) 4629 return -EOPNOTSUPP; 4630 4631 return rdev->ops->flush_pmksa(&rdev->wiphy, dev); 4632 } 4633 4634 static int nl80211_remain_on_channel(struct sk_buff *skb, 4635 struct genl_info *info) 4636 { 4637 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 4638 struct net_device *dev = info->user_ptr[1]; 4639 struct ieee80211_channel *chan; 4640 struct sk_buff *msg; 4641 void *hdr; 4642 u64 cookie; 4643 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT; 4644 u32 freq, duration; 4645 int err; 4646 4647 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] || 4648 !info->attrs[NL80211_ATTR_DURATION]) 4649 return -EINVAL; 4650 4651 duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]); 4652 4653 /* 4654 * We should be on that channel for at least one jiffie, 4655 * and more than 5 seconds seems excessive. 4656 */ 4657 if (!duration || !msecs_to_jiffies(duration) || 4658 duration > rdev->wiphy.max_remain_on_channel_duration) 4659 return -EINVAL; 4660 4661 if (!rdev->ops->remain_on_channel) 4662 return -EOPNOTSUPP; 4663 4664 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) { 4665 channel_type = nla_get_u32( 4666 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]); 4667 if (channel_type != NL80211_CHAN_NO_HT && 4668 channel_type != NL80211_CHAN_HT20 && 4669 channel_type != NL80211_CHAN_HT40PLUS && 4670 channel_type != NL80211_CHAN_HT40MINUS) 4671 return -EINVAL; 4672 } 4673 4674 freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]); 4675 chan = rdev_freq_to_chan(rdev, freq, channel_type); 4676 if (chan == NULL) 4677 return -EINVAL; 4678 4679 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 4680 if (!msg) 4681 return -ENOMEM; 4682 4683 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0, 4684 NL80211_CMD_REMAIN_ON_CHANNEL); 4685 4686 if (IS_ERR(hdr)) { 4687 err = PTR_ERR(hdr); 4688 goto free_msg; 4689 } 4690 4691 err = rdev->ops->remain_on_channel(&rdev->wiphy, dev, chan, 4692 channel_type, duration, &cookie); 4693 4694 if (err) 4695 goto free_msg; 4696 4697 NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie); 4698 4699 genlmsg_end(msg, hdr); 4700 4701 return genlmsg_reply(msg, info); 4702 4703 nla_put_failure: 4704 err = -ENOBUFS; 4705 free_msg: 4706 nlmsg_free(msg); 4707 return err; 4708 } 4709 4710 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb, 4711 struct genl_info *info) 4712 { 4713 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 4714 struct net_device *dev = info->user_ptr[1]; 4715 u64 cookie; 4716 4717 if (!info->attrs[NL80211_ATTR_COOKIE]) 4718 return -EINVAL; 4719 4720 if (!rdev->ops->cancel_remain_on_channel) 4721 return -EOPNOTSUPP; 4722 4723 cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]); 4724 4725 return rdev->ops->cancel_remain_on_channel(&rdev->wiphy, dev, cookie); 4726 } 4727 4728 static u32 rateset_to_mask(struct ieee80211_supported_band *sband, 4729 u8 *rates, u8 rates_len) 4730 { 4731 u8 i; 4732 u32 mask = 0; 4733 4734 for (i = 0; i < rates_len; i++) { 4735 int rate = (rates[i] & 0x7f) * 5; 4736 int ridx; 4737 for (ridx = 0; ridx < sband->n_bitrates; ridx++) { 4738 struct ieee80211_rate *srate = 4739 &sband->bitrates[ridx]; 4740 if (rate == srate->bitrate) { 4741 mask |= 1 << ridx; 4742 break; 4743 } 4744 } 4745 if (ridx == sband->n_bitrates) 4746 return 0; /* rate not found */ 4747 } 4748 4749 return mask; 4750 } 4751 4752 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = { 4753 [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY, 4754 .len = NL80211_MAX_SUPP_RATES }, 4755 }; 4756 4757 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb, 4758 struct genl_info *info) 4759 { 4760 struct nlattr *tb[NL80211_TXRATE_MAX + 1]; 4761 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 4762 struct cfg80211_bitrate_mask mask; 4763 int rem, i; 4764 struct net_device *dev = info->user_ptr[1]; 4765 struct nlattr *tx_rates; 4766 struct ieee80211_supported_band *sband; 4767 4768 if (info->attrs[NL80211_ATTR_TX_RATES] == NULL) 4769 return -EINVAL; 4770 4771 if (!rdev->ops->set_bitrate_mask) 4772 return -EOPNOTSUPP; 4773 4774 memset(&mask, 0, sizeof(mask)); 4775 /* Default to all rates enabled */ 4776 for (i = 0; i < IEEE80211_NUM_BANDS; i++) { 4777 sband = rdev->wiphy.bands[i]; 4778 mask.control[i].legacy = 4779 sband ? (1 << sband->n_bitrates) - 1 : 0; 4780 } 4781 4782 /* 4783 * The nested attribute uses enum nl80211_band as the index. This maps 4784 * directly to the enum ieee80211_band values used in cfg80211. 4785 */ 4786 nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem) 4787 { 4788 enum ieee80211_band band = nla_type(tx_rates); 4789 if (band < 0 || band >= IEEE80211_NUM_BANDS) 4790 return -EINVAL; 4791 sband = rdev->wiphy.bands[band]; 4792 if (sband == NULL) 4793 return -EINVAL; 4794 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates), 4795 nla_len(tx_rates), nl80211_txattr_policy); 4796 if (tb[NL80211_TXRATE_LEGACY]) { 4797 mask.control[band].legacy = rateset_to_mask( 4798 sband, 4799 nla_data(tb[NL80211_TXRATE_LEGACY]), 4800 nla_len(tb[NL80211_TXRATE_LEGACY])); 4801 if (mask.control[band].legacy == 0) 4802 return -EINVAL; 4803 } 4804 } 4805 4806 return rdev->ops->set_bitrate_mask(&rdev->wiphy, dev, NULL, &mask); 4807 } 4808 4809 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info) 4810 { 4811 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 4812 struct net_device *dev = info->user_ptr[1]; 4813 u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION; 4814 4815 if (!info->attrs[NL80211_ATTR_FRAME_MATCH]) 4816 return -EINVAL; 4817 4818 if (info->attrs[NL80211_ATTR_FRAME_TYPE]) 4819 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]); 4820 4821 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION && 4822 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC && 4823 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT && 4824 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP && 4825 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN && 4826 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT && 4827 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) 4828 return -EOPNOTSUPP; 4829 4830 /* not much point in registering if we can't reply */ 4831 if (!rdev->ops->mgmt_tx) 4832 return -EOPNOTSUPP; 4833 4834 return cfg80211_mlme_register_mgmt(dev->ieee80211_ptr, info->snd_pid, 4835 frame_type, 4836 nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]), 4837 nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH])); 4838 } 4839 4840 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info) 4841 { 4842 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 4843 struct net_device *dev = info->user_ptr[1]; 4844 struct ieee80211_channel *chan; 4845 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT; 4846 bool channel_type_valid = false; 4847 u32 freq; 4848 int err; 4849 void *hdr; 4850 u64 cookie; 4851 struct sk_buff *msg; 4852 unsigned int wait = 0; 4853 bool offchan; 4854 4855 if (!info->attrs[NL80211_ATTR_FRAME] || 4856 !info->attrs[NL80211_ATTR_WIPHY_FREQ]) 4857 return -EINVAL; 4858 4859 if (!rdev->ops->mgmt_tx) 4860 return -EOPNOTSUPP; 4861 4862 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION && 4863 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC && 4864 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT && 4865 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP && 4866 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN && 4867 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT && 4868 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) 4869 return -EOPNOTSUPP; 4870 4871 if (info->attrs[NL80211_ATTR_DURATION]) { 4872 if (!rdev->ops->mgmt_tx_cancel_wait) 4873 return -EINVAL; 4874 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]); 4875 } 4876 4877 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) { 4878 channel_type = nla_get_u32( 4879 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]); 4880 if (channel_type != NL80211_CHAN_NO_HT && 4881 channel_type != NL80211_CHAN_HT20 && 4882 channel_type != NL80211_CHAN_HT40PLUS && 4883 channel_type != NL80211_CHAN_HT40MINUS) 4884 return -EINVAL; 4885 channel_type_valid = true; 4886 } 4887 4888 offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK]; 4889 4890 freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]); 4891 chan = rdev_freq_to_chan(rdev, freq, channel_type); 4892 if (chan == NULL) 4893 return -EINVAL; 4894 4895 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 4896 if (!msg) 4897 return -ENOMEM; 4898 4899 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0, 4900 NL80211_CMD_FRAME); 4901 4902 if (IS_ERR(hdr)) { 4903 err = PTR_ERR(hdr); 4904 goto free_msg; 4905 } 4906 err = cfg80211_mlme_mgmt_tx(rdev, dev, chan, offchan, channel_type, 4907 channel_type_valid, wait, 4908 nla_data(info->attrs[NL80211_ATTR_FRAME]), 4909 nla_len(info->attrs[NL80211_ATTR_FRAME]), 4910 &cookie); 4911 if (err) 4912 goto free_msg; 4913 4914 NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie); 4915 4916 genlmsg_end(msg, hdr); 4917 return genlmsg_reply(msg, info); 4918 4919 nla_put_failure: 4920 err = -ENOBUFS; 4921 free_msg: 4922 nlmsg_free(msg); 4923 return err; 4924 } 4925 4926 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info) 4927 { 4928 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 4929 struct net_device *dev = info->user_ptr[1]; 4930 u64 cookie; 4931 4932 if (!info->attrs[NL80211_ATTR_COOKIE]) 4933 return -EINVAL; 4934 4935 if (!rdev->ops->mgmt_tx_cancel_wait) 4936 return -EOPNOTSUPP; 4937 4938 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION && 4939 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC && 4940 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT && 4941 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP && 4942 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN && 4943 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) 4944 return -EOPNOTSUPP; 4945 4946 cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]); 4947 4948 return rdev->ops->mgmt_tx_cancel_wait(&rdev->wiphy, dev, cookie); 4949 } 4950 4951 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info) 4952 { 4953 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 4954 struct wireless_dev *wdev; 4955 struct net_device *dev = info->user_ptr[1]; 4956 u8 ps_state; 4957 bool state; 4958 int err; 4959 4960 if (!info->attrs[NL80211_ATTR_PS_STATE]) 4961 return -EINVAL; 4962 4963 ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]); 4964 4965 if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED) 4966 return -EINVAL; 4967 4968 wdev = dev->ieee80211_ptr; 4969 4970 if (!rdev->ops->set_power_mgmt) 4971 return -EOPNOTSUPP; 4972 4973 state = (ps_state == NL80211_PS_ENABLED) ? true : false; 4974 4975 if (state == wdev->ps) 4976 return 0; 4977 4978 err = rdev->ops->set_power_mgmt(wdev->wiphy, dev, state, 4979 wdev->ps_timeout); 4980 if (!err) 4981 wdev->ps = state; 4982 return err; 4983 } 4984 4985 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info) 4986 { 4987 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 4988 enum nl80211_ps_state ps_state; 4989 struct wireless_dev *wdev; 4990 struct net_device *dev = info->user_ptr[1]; 4991 struct sk_buff *msg; 4992 void *hdr; 4993 int err; 4994 4995 wdev = dev->ieee80211_ptr; 4996 4997 if (!rdev->ops->set_power_mgmt) 4998 return -EOPNOTSUPP; 4999 5000 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 5001 if (!msg) 5002 return -ENOMEM; 5003 5004 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0, 5005 NL80211_CMD_GET_POWER_SAVE); 5006 if (!hdr) { 5007 err = -ENOBUFS; 5008 goto free_msg; 5009 } 5010 5011 if (wdev->ps) 5012 ps_state = NL80211_PS_ENABLED; 5013 else 5014 ps_state = NL80211_PS_DISABLED; 5015 5016 NLA_PUT_U32(msg, NL80211_ATTR_PS_STATE, ps_state); 5017 5018 genlmsg_end(msg, hdr); 5019 return genlmsg_reply(msg, info); 5020 5021 nla_put_failure: 5022 err = -ENOBUFS; 5023 free_msg: 5024 nlmsg_free(msg); 5025 return err; 5026 } 5027 5028 static struct nla_policy 5029 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = { 5030 [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 }, 5031 [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 }, 5032 [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 }, 5033 }; 5034 5035 static int nl80211_set_cqm_rssi(struct genl_info *info, 5036 s32 threshold, u32 hysteresis) 5037 { 5038 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 5039 struct wireless_dev *wdev; 5040 struct net_device *dev = info->user_ptr[1]; 5041 5042 if (threshold > 0) 5043 return -EINVAL; 5044 5045 wdev = dev->ieee80211_ptr; 5046 5047 if (!rdev->ops->set_cqm_rssi_config) 5048 return -EOPNOTSUPP; 5049 5050 if (wdev->iftype != NL80211_IFTYPE_STATION && 5051 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT) 5052 return -EOPNOTSUPP; 5053 5054 return rdev->ops->set_cqm_rssi_config(wdev->wiphy, dev, 5055 threshold, hysteresis); 5056 } 5057 5058 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info) 5059 { 5060 struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1]; 5061 struct nlattr *cqm; 5062 int err; 5063 5064 cqm = info->attrs[NL80211_ATTR_CQM]; 5065 if (!cqm) { 5066 err = -EINVAL; 5067 goto out; 5068 } 5069 5070 err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm, 5071 nl80211_attr_cqm_policy); 5072 if (err) 5073 goto out; 5074 5075 if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] && 5076 attrs[NL80211_ATTR_CQM_RSSI_HYST]) { 5077 s32 threshold; 5078 u32 hysteresis; 5079 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]); 5080 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]); 5081 err = nl80211_set_cqm_rssi(info, threshold, hysteresis); 5082 } else 5083 err = -EINVAL; 5084 5085 out: 5086 return err; 5087 } 5088 5089 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info) 5090 { 5091 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 5092 struct net_device *dev = info->user_ptr[1]; 5093 struct mesh_config cfg; 5094 struct mesh_setup setup; 5095 int err; 5096 5097 /* start with default */ 5098 memcpy(&cfg, &default_mesh_config, sizeof(cfg)); 5099 memcpy(&setup, &default_mesh_setup, sizeof(setup)); 5100 5101 if (info->attrs[NL80211_ATTR_MESH_CONFIG]) { 5102 /* and parse parameters if given */ 5103 err = nl80211_parse_mesh_config(info, &cfg, NULL); 5104 if (err) 5105 return err; 5106 } 5107 5108 if (!info->attrs[NL80211_ATTR_MESH_ID] || 5109 !nla_len(info->attrs[NL80211_ATTR_MESH_ID])) 5110 return -EINVAL; 5111 5112 setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]); 5113 setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]); 5114 5115 if (info->attrs[NL80211_ATTR_MESH_SETUP]) { 5116 /* parse additional setup parameters if given */ 5117 err = nl80211_parse_mesh_setup(info, &setup); 5118 if (err) 5119 return err; 5120 } 5121 5122 return cfg80211_join_mesh(rdev, dev, &setup, &cfg); 5123 } 5124 5125 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info) 5126 { 5127 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 5128 struct net_device *dev = info->user_ptr[1]; 5129 5130 return cfg80211_leave_mesh(rdev, dev); 5131 } 5132 5133 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info) 5134 { 5135 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 5136 struct sk_buff *msg; 5137 void *hdr; 5138 5139 if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns) 5140 return -EOPNOTSUPP; 5141 5142 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 5143 if (!msg) 5144 return -ENOMEM; 5145 5146 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0, 5147 NL80211_CMD_GET_WOWLAN); 5148 if (!hdr) 5149 goto nla_put_failure; 5150 5151 if (rdev->wowlan) { 5152 struct nlattr *nl_wowlan; 5153 5154 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS); 5155 if (!nl_wowlan) 5156 goto nla_put_failure; 5157 5158 if (rdev->wowlan->any) 5159 NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_ANY); 5160 if (rdev->wowlan->disconnect) 5161 NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_DISCONNECT); 5162 if (rdev->wowlan->magic_pkt) 5163 NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT); 5164 if (rdev->wowlan->n_patterns) { 5165 struct nlattr *nl_pats, *nl_pat; 5166 int i, pat_len; 5167 5168 nl_pats = nla_nest_start(msg, 5169 NL80211_WOWLAN_TRIG_PKT_PATTERN); 5170 if (!nl_pats) 5171 goto nla_put_failure; 5172 5173 for (i = 0; i < rdev->wowlan->n_patterns; i++) { 5174 nl_pat = nla_nest_start(msg, i + 1); 5175 if (!nl_pat) 5176 goto nla_put_failure; 5177 pat_len = rdev->wowlan->patterns[i].pattern_len; 5178 NLA_PUT(msg, NL80211_WOWLAN_PKTPAT_MASK, 5179 DIV_ROUND_UP(pat_len, 8), 5180 rdev->wowlan->patterns[i].mask); 5181 NLA_PUT(msg, NL80211_WOWLAN_PKTPAT_PATTERN, 5182 pat_len, 5183 rdev->wowlan->patterns[i].pattern); 5184 nla_nest_end(msg, nl_pat); 5185 } 5186 nla_nest_end(msg, nl_pats); 5187 } 5188 5189 nla_nest_end(msg, nl_wowlan); 5190 } 5191 5192 genlmsg_end(msg, hdr); 5193 return genlmsg_reply(msg, info); 5194 5195 nla_put_failure: 5196 nlmsg_free(msg); 5197 return -ENOBUFS; 5198 } 5199 5200 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info) 5201 { 5202 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 5203 struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG]; 5204 struct cfg80211_wowlan no_triggers = {}; 5205 struct cfg80211_wowlan new_triggers = {}; 5206 struct wiphy_wowlan_support *wowlan = &rdev->wiphy.wowlan; 5207 int err, i; 5208 5209 if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns) 5210 return -EOPNOTSUPP; 5211 5212 if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) 5213 goto no_triggers; 5214 5215 err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG, 5216 nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]), 5217 nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]), 5218 nl80211_wowlan_policy); 5219 if (err) 5220 return err; 5221 5222 if (tb[NL80211_WOWLAN_TRIG_ANY]) { 5223 if (!(wowlan->flags & WIPHY_WOWLAN_ANY)) 5224 return -EINVAL; 5225 new_triggers.any = true; 5226 } 5227 5228 if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) { 5229 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT)) 5230 return -EINVAL; 5231 new_triggers.disconnect = true; 5232 } 5233 5234 if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) { 5235 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT)) 5236 return -EINVAL; 5237 new_triggers.magic_pkt = true; 5238 } 5239 5240 if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) { 5241 struct nlattr *pat; 5242 int n_patterns = 0; 5243 int rem, pat_len, mask_len; 5244 struct nlattr *pat_tb[NUM_NL80211_WOWLAN_PKTPAT]; 5245 5246 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN], 5247 rem) 5248 n_patterns++; 5249 if (n_patterns > wowlan->n_patterns) 5250 return -EINVAL; 5251 5252 new_triggers.patterns = kcalloc(n_patterns, 5253 sizeof(new_triggers.patterns[0]), 5254 GFP_KERNEL); 5255 if (!new_triggers.patterns) 5256 return -ENOMEM; 5257 5258 new_triggers.n_patterns = n_patterns; 5259 i = 0; 5260 5261 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN], 5262 rem) { 5263 nla_parse(pat_tb, MAX_NL80211_WOWLAN_PKTPAT, 5264 nla_data(pat), nla_len(pat), NULL); 5265 err = -EINVAL; 5266 if (!pat_tb[NL80211_WOWLAN_PKTPAT_MASK] || 5267 !pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]) 5268 goto error; 5269 pat_len = nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]); 5270 mask_len = DIV_ROUND_UP(pat_len, 8); 5271 if (nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]) != 5272 mask_len) 5273 goto error; 5274 if (pat_len > wowlan->pattern_max_len || 5275 pat_len < wowlan->pattern_min_len) 5276 goto error; 5277 5278 new_triggers.patterns[i].mask = 5279 kmalloc(mask_len + pat_len, GFP_KERNEL); 5280 if (!new_triggers.patterns[i].mask) { 5281 err = -ENOMEM; 5282 goto error; 5283 } 5284 new_triggers.patterns[i].pattern = 5285 new_triggers.patterns[i].mask + mask_len; 5286 memcpy(new_triggers.patterns[i].mask, 5287 nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]), 5288 mask_len); 5289 new_triggers.patterns[i].pattern_len = pat_len; 5290 memcpy(new_triggers.patterns[i].pattern, 5291 nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]), 5292 pat_len); 5293 i++; 5294 } 5295 } 5296 5297 if (memcmp(&new_triggers, &no_triggers, sizeof(new_triggers))) { 5298 struct cfg80211_wowlan *ntrig; 5299 ntrig = kmemdup(&new_triggers, sizeof(new_triggers), 5300 GFP_KERNEL); 5301 if (!ntrig) { 5302 err = -ENOMEM; 5303 goto error; 5304 } 5305 cfg80211_rdev_free_wowlan(rdev); 5306 rdev->wowlan = ntrig; 5307 } else { 5308 no_triggers: 5309 cfg80211_rdev_free_wowlan(rdev); 5310 rdev->wowlan = NULL; 5311 } 5312 5313 return 0; 5314 error: 5315 for (i = 0; i < new_triggers.n_patterns; i++) 5316 kfree(new_triggers.patterns[i].mask); 5317 kfree(new_triggers.patterns); 5318 return err; 5319 } 5320 5321 #define NL80211_FLAG_NEED_WIPHY 0x01 5322 #define NL80211_FLAG_NEED_NETDEV 0x02 5323 #define NL80211_FLAG_NEED_RTNL 0x04 5324 #define NL80211_FLAG_CHECK_NETDEV_UP 0x08 5325 #define NL80211_FLAG_NEED_NETDEV_UP (NL80211_FLAG_NEED_NETDEV |\ 5326 NL80211_FLAG_CHECK_NETDEV_UP) 5327 5328 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb, 5329 struct genl_info *info) 5330 { 5331 struct cfg80211_registered_device *rdev; 5332 struct net_device *dev; 5333 int err; 5334 bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL; 5335 5336 if (rtnl) 5337 rtnl_lock(); 5338 5339 if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) { 5340 rdev = cfg80211_get_dev_from_info(info); 5341 if (IS_ERR(rdev)) { 5342 if (rtnl) 5343 rtnl_unlock(); 5344 return PTR_ERR(rdev); 5345 } 5346 info->user_ptr[0] = rdev; 5347 } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) { 5348 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev); 5349 if (err) { 5350 if (rtnl) 5351 rtnl_unlock(); 5352 return err; 5353 } 5354 if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP && 5355 !netif_running(dev)) { 5356 cfg80211_unlock_rdev(rdev); 5357 dev_put(dev); 5358 if (rtnl) 5359 rtnl_unlock(); 5360 return -ENETDOWN; 5361 } 5362 info->user_ptr[0] = rdev; 5363 info->user_ptr[1] = dev; 5364 } 5365 5366 return 0; 5367 } 5368 5369 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb, 5370 struct genl_info *info) 5371 { 5372 if (info->user_ptr[0]) 5373 cfg80211_unlock_rdev(info->user_ptr[0]); 5374 if (info->user_ptr[1]) 5375 dev_put(info->user_ptr[1]); 5376 if (ops->internal_flags & NL80211_FLAG_NEED_RTNL) 5377 rtnl_unlock(); 5378 } 5379 5380 static struct genl_ops nl80211_ops[] = { 5381 { 5382 .cmd = NL80211_CMD_GET_WIPHY, 5383 .doit = nl80211_get_wiphy, 5384 .dumpit = nl80211_dump_wiphy, 5385 .policy = nl80211_policy, 5386 /* can be retrieved by unprivileged users */ 5387 .internal_flags = NL80211_FLAG_NEED_WIPHY, 5388 }, 5389 { 5390 .cmd = NL80211_CMD_SET_WIPHY, 5391 .doit = nl80211_set_wiphy, 5392 .policy = nl80211_policy, 5393 .flags = GENL_ADMIN_PERM, 5394 .internal_flags = NL80211_FLAG_NEED_RTNL, 5395 }, 5396 { 5397 .cmd = NL80211_CMD_GET_INTERFACE, 5398 .doit = nl80211_get_interface, 5399 .dumpit = nl80211_dump_interface, 5400 .policy = nl80211_policy, 5401 /* can be retrieved by unprivileged users */ 5402 .internal_flags = NL80211_FLAG_NEED_NETDEV, 5403 }, 5404 { 5405 .cmd = NL80211_CMD_SET_INTERFACE, 5406 .doit = nl80211_set_interface, 5407 .policy = nl80211_policy, 5408 .flags = GENL_ADMIN_PERM, 5409 .internal_flags = NL80211_FLAG_NEED_NETDEV | 5410 NL80211_FLAG_NEED_RTNL, 5411 }, 5412 { 5413 .cmd = NL80211_CMD_NEW_INTERFACE, 5414 .doit = nl80211_new_interface, 5415 .policy = nl80211_policy, 5416 .flags = GENL_ADMIN_PERM, 5417 .internal_flags = NL80211_FLAG_NEED_WIPHY | 5418 NL80211_FLAG_NEED_RTNL, 5419 }, 5420 { 5421 .cmd = NL80211_CMD_DEL_INTERFACE, 5422 .doit = nl80211_del_interface, 5423 .policy = nl80211_policy, 5424 .flags = GENL_ADMIN_PERM, 5425 .internal_flags = NL80211_FLAG_NEED_NETDEV | 5426 NL80211_FLAG_NEED_RTNL, 5427 }, 5428 { 5429 .cmd = NL80211_CMD_GET_KEY, 5430 .doit = nl80211_get_key, 5431 .policy = nl80211_policy, 5432 .flags = GENL_ADMIN_PERM, 5433 .internal_flags = NL80211_FLAG_NEED_NETDEV | 5434 NL80211_FLAG_NEED_RTNL, 5435 }, 5436 { 5437 .cmd = NL80211_CMD_SET_KEY, 5438 .doit = nl80211_set_key, 5439 .policy = nl80211_policy, 5440 .flags = GENL_ADMIN_PERM, 5441 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | 5442 NL80211_FLAG_NEED_RTNL, 5443 }, 5444 { 5445 .cmd = NL80211_CMD_NEW_KEY, 5446 .doit = nl80211_new_key, 5447 .policy = nl80211_policy, 5448 .flags = GENL_ADMIN_PERM, 5449 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | 5450 NL80211_FLAG_NEED_RTNL, 5451 }, 5452 { 5453 .cmd = NL80211_CMD_DEL_KEY, 5454 .doit = nl80211_del_key, 5455 .policy = nl80211_policy, 5456 .flags = GENL_ADMIN_PERM, 5457 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | 5458 NL80211_FLAG_NEED_RTNL, 5459 }, 5460 { 5461 .cmd = NL80211_CMD_SET_BEACON, 5462 .policy = nl80211_policy, 5463 .flags = GENL_ADMIN_PERM, 5464 .doit = nl80211_addset_beacon, 5465 .internal_flags = NL80211_FLAG_NEED_NETDEV | 5466 NL80211_FLAG_NEED_RTNL, 5467 }, 5468 { 5469 .cmd = NL80211_CMD_NEW_BEACON, 5470 .policy = nl80211_policy, 5471 .flags = GENL_ADMIN_PERM, 5472 .doit = nl80211_addset_beacon, 5473 .internal_flags = NL80211_FLAG_NEED_NETDEV | 5474 NL80211_FLAG_NEED_RTNL, 5475 }, 5476 { 5477 .cmd = NL80211_CMD_DEL_BEACON, 5478 .policy = nl80211_policy, 5479 .flags = GENL_ADMIN_PERM, 5480 .doit = nl80211_del_beacon, 5481 .internal_flags = NL80211_FLAG_NEED_NETDEV | 5482 NL80211_FLAG_NEED_RTNL, 5483 }, 5484 { 5485 .cmd = NL80211_CMD_GET_STATION, 5486 .doit = nl80211_get_station, 5487 .dumpit = nl80211_dump_station, 5488 .policy = nl80211_policy, 5489 .internal_flags = NL80211_FLAG_NEED_NETDEV | 5490 NL80211_FLAG_NEED_RTNL, 5491 }, 5492 { 5493 .cmd = NL80211_CMD_SET_STATION, 5494 .doit = nl80211_set_station, 5495 .policy = nl80211_policy, 5496 .flags = GENL_ADMIN_PERM, 5497 .internal_flags = NL80211_FLAG_NEED_NETDEV | 5498 NL80211_FLAG_NEED_RTNL, 5499 }, 5500 { 5501 .cmd = NL80211_CMD_NEW_STATION, 5502 .doit = nl80211_new_station, 5503 .policy = nl80211_policy, 5504 .flags = GENL_ADMIN_PERM, 5505 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | 5506 NL80211_FLAG_NEED_RTNL, 5507 }, 5508 { 5509 .cmd = NL80211_CMD_DEL_STATION, 5510 .doit = nl80211_del_station, 5511 .policy = nl80211_policy, 5512 .flags = GENL_ADMIN_PERM, 5513 .internal_flags = NL80211_FLAG_NEED_NETDEV | 5514 NL80211_FLAG_NEED_RTNL, 5515 }, 5516 { 5517 .cmd = NL80211_CMD_GET_MPATH, 5518 .doit = nl80211_get_mpath, 5519 .dumpit = nl80211_dump_mpath, 5520 .policy = nl80211_policy, 5521 .flags = GENL_ADMIN_PERM, 5522 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | 5523 NL80211_FLAG_NEED_RTNL, 5524 }, 5525 { 5526 .cmd = NL80211_CMD_SET_MPATH, 5527 .doit = nl80211_set_mpath, 5528 .policy = nl80211_policy, 5529 .flags = GENL_ADMIN_PERM, 5530 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | 5531 NL80211_FLAG_NEED_RTNL, 5532 }, 5533 { 5534 .cmd = NL80211_CMD_NEW_MPATH, 5535 .doit = nl80211_new_mpath, 5536 .policy = nl80211_policy, 5537 .flags = GENL_ADMIN_PERM, 5538 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | 5539 NL80211_FLAG_NEED_RTNL, 5540 }, 5541 { 5542 .cmd = NL80211_CMD_DEL_MPATH, 5543 .doit = nl80211_del_mpath, 5544 .policy = nl80211_policy, 5545 .flags = GENL_ADMIN_PERM, 5546 .internal_flags = NL80211_FLAG_NEED_NETDEV | 5547 NL80211_FLAG_NEED_RTNL, 5548 }, 5549 { 5550 .cmd = NL80211_CMD_SET_BSS, 5551 .doit = nl80211_set_bss, 5552 .policy = nl80211_policy, 5553 .flags = GENL_ADMIN_PERM, 5554 .internal_flags = NL80211_FLAG_NEED_NETDEV | 5555 NL80211_FLAG_NEED_RTNL, 5556 }, 5557 { 5558 .cmd = NL80211_CMD_GET_REG, 5559 .doit = nl80211_get_reg, 5560 .policy = nl80211_policy, 5561 /* can be retrieved by unprivileged users */ 5562 }, 5563 { 5564 .cmd = NL80211_CMD_SET_REG, 5565 .doit = nl80211_set_reg, 5566 .policy = nl80211_policy, 5567 .flags = GENL_ADMIN_PERM, 5568 }, 5569 { 5570 .cmd = NL80211_CMD_REQ_SET_REG, 5571 .doit = nl80211_req_set_reg, 5572 .policy = nl80211_policy, 5573 .flags = GENL_ADMIN_PERM, 5574 }, 5575 { 5576 .cmd = NL80211_CMD_GET_MESH_CONFIG, 5577 .doit = nl80211_get_mesh_config, 5578 .policy = nl80211_policy, 5579 /* can be retrieved by unprivileged users */ 5580 .internal_flags = NL80211_FLAG_NEED_NETDEV | 5581 NL80211_FLAG_NEED_RTNL, 5582 }, 5583 { 5584 .cmd = NL80211_CMD_SET_MESH_CONFIG, 5585 .doit = nl80211_update_mesh_config, 5586 .policy = nl80211_policy, 5587 .flags = GENL_ADMIN_PERM, 5588 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | 5589 NL80211_FLAG_NEED_RTNL, 5590 }, 5591 { 5592 .cmd = NL80211_CMD_TRIGGER_SCAN, 5593 .doit = nl80211_trigger_scan, 5594 .policy = nl80211_policy, 5595 .flags = GENL_ADMIN_PERM, 5596 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | 5597 NL80211_FLAG_NEED_RTNL, 5598 }, 5599 { 5600 .cmd = NL80211_CMD_GET_SCAN, 5601 .policy = nl80211_policy, 5602 .dumpit = nl80211_dump_scan, 5603 }, 5604 { 5605 .cmd = NL80211_CMD_START_SCHED_SCAN, 5606 .doit = nl80211_start_sched_scan, 5607 .policy = nl80211_policy, 5608 .flags = GENL_ADMIN_PERM, 5609 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | 5610 NL80211_FLAG_NEED_RTNL, 5611 }, 5612 { 5613 .cmd = NL80211_CMD_STOP_SCHED_SCAN, 5614 .doit = nl80211_stop_sched_scan, 5615 .policy = nl80211_policy, 5616 .flags = GENL_ADMIN_PERM, 5617 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | 5618 NL80211_FLAG_NEED_RTNL, 5619 }, 5620 { 5621 .cmd = NL80211_CMD_AUTHENTICATE, 5622 .doit = nl80211_authenticate, 5623 .policy = nl80211_policy, 5624 .flags = GENL_ADMIN_PERM, 5625 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | 5626 NL80211_FLAG_NEED_RTNL, 5627 }, 5628 { 5629 .cmd = NL80211_CMD_ASSOCIATE, 5630 .doit = nl80211_associate, 5631 .policy = nl80211_policy, 5632 .flags = GENL_ADMIN_PERM, 5633 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | 5634 NL80211_FLAG_NEED_RTNL, 5635 }, 5636 { 5637 .cmd = NL80211_CMD_DEAUTHENTICATE, 5638 .doit = nl80211_deauthenticate, 5639 .policy = nl80211_policy, 5640 .flags = GENL_ADMIN_PERM, 5641 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | 5642 NL80211_FLAG_NEED_RTNL, 5643 }, 5644 { 5645 .cmd = NL80211_CMD_DISASSOCIATE, 5646 .doit = nl80211_disassociate, 5647 .policy = nl80211_policy, 5648 .flags = GENL_ADMIN_PERM, 5649 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | 5650 NL80211_FLAG_NEED_RTNL, 5651 }, 5652 { 5653 .cmd = NL80211_CMD_JOIN_IBSS, 5654 .doit = nl80211_join_ibss, 5655 .policy = nl80211_policy, 5656 .flags = GENL_ADMIN_PERM, 5657 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | 5658 NL80211_FLAG_NEED_RTNL, 5659 }, 5660 { 5661 .cmd = NL80211_CMD_LEAVE_IBSS, 5662 .doit = nl80211_leave_ibss, 5663 .policy = nl80211_policy, 5664 .flags = GENL_ADMIN_PERM, 5665 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | 5666 NL80211_FLAG_NEED_RTNL, 5667 }, 5668 #ifdef CONFIG_NL80211_TESTMODE 5669 { 5670 .cmd = NL80211_CMD_TESTMODE, 5671 .doit = nl80211_testmode_do, 5672 .policy = nl80211_policy, 5673 .flags = GENL_ADMIN_PERM, 5674 .internal_flags = NL80211_FLAG_NEED_WIPHY | 5675 NL80211_FLAG_NEED_RTNL, 5676 }, 5677 #endif 5678 { 5679 .cmd = NL80211_CMD_CONNECT, 5680 .doit = nl80211_connect, 5681 .policy = nl80211_policy, 5682 .flags = GENL_ADMIN_PERM, 5683 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | 5684 NL80211_FLAG_NEED_RTNL, 5685 }, 5686 { 5687 .cmd = NL80211_CMD_DISCONNECT, 5688 .doit = nl80211_disconnect, 5689 .policy = nl80211_policy, 5690 .flags = GENL_ADMIN_PERM, 5691 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | 5692 NL80211_FLAG_NEED_RTNL, 5693 }, 5694 { 5695 .cmd = NL80211_CMD_SET_WIPHY_NETNS, 5696 .doit = nl80211_wiphy_netns, 5697 .policy = nl80211_policy, 5698 .flags = GENL_ADMIN_PERM, 5699 .internal_flags = NL80211_FLAG_NEED_WIPHY | 5700 NL80211_FLAG_NEED_RTNL, 5701 }, 5702 { 5703 .cmd = NL80211_CMD_GET_SURVEY, 5704 .policy = nl80211_policy, 5705 .dumpit = nl80211_dump_survey, 5706 }, 5707 { 5708 .cmd = NL80211_CMD_SET_PMKSA, 5709 .doit = nl80211_setdel_pmksa, 5710 .policy = nl80211_policy, 5711 .flags = GENL_ADMIN_PERM, 5712 .internal_flags = NL80211_FLAG_NEED_NETDEV | 5713 NL80211_FLAG_NEED_RTNL, 5714 }, 5715 { 5716 .cmd = NL80211_CMD_DEL_PMKSA, 5717 .doit = nl80211_setdel_pmksa, 5718 .policy = nl80211_policy, 5719 .flags = GENL_ADMIN_PERM, 5720 .internal_flags = NL80211_FLAG_NEED_NETDEV | 5721 NL80211_FLAG_NEED_RTNL, 5722 }, 5723 { 5724 .cmd = NL80211_CMD_FLUSH_PMKSA, 5725 .doit = nl80211_flush_pmksa, 5726 .policy = nl80211_policy, 5727 .flags = GENL_ADMIN_PERM, 5728 .internal_flags = NL80211_FLAG_NEED_NETDEV | 5729 NL80211_FLAG_NEED_RTNL, 5730 }, 5731 { 5732 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL, 5733 .doit = nl80211_remain_on_channel, 5734 .policy = nl80211_policy, 5735 .flags = GENL_ADMIN_PERM, 5736 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | 5737 NL80211_FLAG_NEED_RTNL, 5738 }, 5739 { 5740 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL, 5741 .doit = nl80211_cancel_remain_on_channel, 5742 .policy = nl80211_policy, 5743 .flags = GENL_ADMIN_PERM, 5744 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | 5745 NL80211_FLAG_NEED_RTNL, 5746 }, 5747 { 5748 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK, 5749 .doit = nl80211_set_tx_bitrate_mask, 5750 .policy = nl80211_policy, 5751 .flags = GENL_ADMIN_PERM, 5752 .internal_flags = NL80211_FLAG_NEED_NETDEV | 5753 NL80211_FLAG_NEED_RTNL, 5754 }, 5755 { 5756 .cmd = NL80211_CMD_REGISTER_FRAME, 5757 .doit = nl80211_register_mgmt, 5758 .policy = nl80211_policy, 5759 .flags = GENL_ADMIN_PERM, 5760 .internal_flags = NL80211_FLAG_NEED_NETDEV | 5761 NL80211_FLAG_NEED_RTNL, 5762 }, 5763 { 5764 .cmd = NL80211_CMD_FRAME, 5765 .doit = nl80211_tx_mgmt, 5766 .policy = nl80211_policy, 5767 .flags = GENL_ADMIN_PERM, 5768 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | 5769 NL80211_FLAG_NEED_RTNL, 5770 }, 5771 { 5772 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL, 5773 .doit = nl80211_tx_mgmt_cancel_wait, 5774 .policy = nl80211_policy, 5775 .flags = GENL_ADMIN_PERM, 5776 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | 5777 NL80211_FLAG_NEED_RTNL, 5778 }, 5779 { 5780 .cmd = NL80211_CMD_SET_POWER_SAVE, 5781 .doit = nl80211_set_power_save, 5782 .policy = nl80211_policy, 5783 .flags = GENL_ADMIN_PERM, 5784 .internal_flags = NL80211_FLAG_NEED_NETDEV | 5785 NL80211_FLAG_NEED_RTNL, 5786 }, 5787 { 5788 .cmd = NL80211_CMD_GET_POWER_SAVE, 5789 .doit = nl80211_get_power_save, 5790 .policy = nl80211_policy, 5791 /* can be retrieved by unprivileged users */ 5792 .internal_flags = NL80211_FLAG_NEED_NETDEV | 5793 NL80211_FLAG_NEED_RTNL, 5794 }, 5795 { 5796 .cmd = NL80211_CMD_SET_CQM, 5797 .doit = nl80211_set_cqm, 5798 .policy = nl80211_policy, 5799 .flags = GENL_ADMIN_PERM, 5800 .internal_flags = NL80211_FLAG_NEED_NETDEV | 5801 NL80211_FLAG_NEED_RTNL, 5802 }, 5803 { 5804 .cmd = NL80211_CMD_SET_CHANNEL, 5805 .doit = nl80211_set_channel, 5806 .policy = nl80211_policy, 5807 .flags = GENL_ADMIN_PERM, 5808 .internal_flags = NL80211_FLAG_NEED_NETDEV | 5809 NL80211_FLAG_NEED_RTNL, 5810 }, 5811 { 5812 .cmd = NL80211_CMD_SET_WDS_PEER, 5813 .doit = nl80211_set_wds_peer, 5814 .policy = nl80211_policy, 5815 .flags = GENL_ADMIN_PERM, 5816 .internal_flags = NL80211_FLAG_NEED_NETDEV | 5817 NL80211_FLAG_NEED_RTNL, 5818 }, 5819 { 5820 .cmd = NL80211_CMD_JOIN_MESH, 5821 .doit = nl80211_join_mesh, 5822 .policy = nl80211_policy, 5823 .flags = GENL_ADMIN_PERM, 5824 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | 5825 NL80211_FLAG_NEED_RTNL, 5826 }, 5827 { 5828 .cmd = NL80211_CMD_LEAVE_MESH, 5829 .doit = nl80211_leave_mesh, 5830 .policy = nl80211_policy, 5831 .flags = GENL_ADMIN_PERM, 5832 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | 5833 NL80211_FLAG_NEED_RTNL, 5834 }, 5835 { 5836 .cmd = NL80211_CMD_GET_WOWLAN, 5837 .doit = nl80211_get_wowlan, 5838 .policy = nl80211_policy, 5839 /* can be retrieved by unprivileged users */ 5840 .internal_flags = NL80211_FLAG_NEED_WIPHY | 5841 NL80211_FLAG_NEED_RTNL, 5842 }, 5843 { 5844 .cmd = NL80211_CMD_SET_WOWLAN, 5845 .doit = nl80211_set_wowlan, 5846 .policy = nl80211_policy, 5847 .flags = GENL_ADMIN_PERM, 5848 .internal_flags = NL80211_FLAG_NEED_WIPHY | 5849 NL80211_FLAG_NEED_RTNL, 5850 }, 5851 }; 5852 5853 static struct genl_multicast_group nl80211_mlme_mcgrp = { 5854 .name = "mlme", 5855 }; 5856 5857 /* multicast groups */ 5858 static struct genl_multicast_group nl80211_config_mcgrp = { 5859 .name = "config", 5860 }; 5861 static struct genl_multicast_group nl80211_scan_mcgrp = { 5862 .name = "scan", 5863 }; 5864 static struct genl_multicast_group nl80211_regulatory_mcgrp = { 5865 .name = "regulatory", 5866 }; 5867 5868 /* notification functions */ 5869 5870 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev) 5871 { 5872 struct sk_buff *msg; 5873 5874 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 5875 if (!msg) 5876 return; 5877 5878 if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) { 5879 nlmsg_free(msg); 5880 return; 5881 } 5882 5883 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0, 5884 nl80211_config_mcgrp.id, GFP_KERNEL); 5885 } 5886 5887 static int nl80211_add_scan_req(struct sk_buff *msg, 5888 struct cfg80211_registered_device *rdev) 5889 { 5890 struct cfg80211_scan_request *req = rdev->scan_req; 5891 struct nlattr *nest; 5892 int i; 5893 5894 ASSERT_RDEV_LOCK(rdev); 5895 5896 if (WARN_ON(!req)) 5897 return 0; 5898 5899 nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS); 5900 if (!nest) 5901 goto nla_put_failure; 5902 for (i = 0; i < req->n_ssids; i++) 5903 NLA_PUT(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid); 5904 nla_nest_end(msg, nest); 5905 5906 nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES); 5907 if (!nest) 5908 goto nla_put_failure; 5909 for (i = 0; i < req->n_channels; i++) 5910 NLA_PUT_U32(msg, i, req->channels[i]->center_freq); 5911 nla_nest_end(msg, nest); 5912 5913 if (req->ie) 5914 NLA_PUT(msg, NL80211_ATTR_IE, req->ie_len, req->ie); 5915 5916 return 0; 5917 nla_put_failure: 5918 return -ENOBUFS; 5919 } 5920 5921 static int nl80211_send_scan_msg(struct sk_buff *msg, 5922 struct cfg80211_registered_device *rdev, 5923 struct net_device *netdev, 5924 u32 pid, u32 seq, int flags, 5925 u32 cmd) 5926 { 5927 void *hdr; 5928 5929 hdr = nl80211hdr_put(msg, pid, seq, flags, cmd); 5930 if (!hdr) 5931 return -1; 5932 5933 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx); 5934 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex); 5935 5936 /* ignore errors and send incomplete event anyway */ 5937 nl80211_add_scan_req(msg, rdev); 5938 5939 return genlmsg_end(msg, hdr); 5940 5941 nla_put_failure: 5942 genlmsg_cancel(msg, hdr); 5943 return -EMSGSIZE; 5944 } 5945 5946 static int 5947 nl80211_send_sched_scan_msg(struct sk_buff *msg, 5948 struct cfg80211_registered_device *rdev, 5949 struct net_device *netdev, 5950 u32 pid, u32 seq, int flags, u32 cmd) 5951 { 5952 void *hdr; 5953 5954 hdr = nl80211hdr_put(msg, pid, seq, flags, cmd); 5955 if (!hdr) 5956 return -1; 5957 5958 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx); 5959 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex); 5960 5961 return genlmsg_end(msg, hdr); 5962 5963 nla_put_failure: 5964 genlmsg_cancel(msg, hdr); 5965 return -EMSGSIZE; 5966 } 5967 5968 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev, 5969 struct net_device *netdev) 5970 { 5971 struct sk_buff *msg; 5972 5973 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); 5974 if (!msg) 5975 return; 5976 5977 if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0, 5978 NL80211_CMD_TRIGGER_SCAN) < 0) { 5979 nlmsg_free(msg); 5980 return; 5981 } 5982 5983 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0, 5984 nl80211_scan_mcgrp.id, GFP_KERNEL); 5985 } 5986 5987 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev, 5988 struct net_device *netdev) 5989 { 5990 struct sk_buff *msg; 5991 5992 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 5993 if (!msg) 5994 return; 5995 5996 if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0, 5997 NL80211_CMD_NEW_SCAN_RESULTS) < 0) { 5998 nlmsg_free(msg); 5999 return; 6000 } 6001 6002 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0, 6003 nl80211_scan_mcgrp.id, GFP_KERNEL); 6004 } 6005 6006 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev, 6007 struct net_device *netdev) 6008 { 6009 struct sk_buff *msg; 6010 6011 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 6012 if (!msg) 6013 return; 6014 6015 if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0, 6016 NL80211_CMD_SCAN_ABORTED) < 0) { 6017 nlmsg_free(msg); 6018 return; 6019 } 6020 6021 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0, 6022 nl80211_scan_mcgrp.id, GFP_KERNEL); 6023 } 6024 6025 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev, 6026 struct net_device *netdev) 6027 { 6028 struct sk_buff *msg; 6029 6030 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 6031 if (!msg) 6032 return; 6033 6034 if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, 6035 NL80211_CMD_SCHED_SCAN_RESULTS) < 0) { 6036 nlmsg_free(msg); 6037 return; 6038 } 6039 6040 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0, 6041 nl80211_scan_mcgrp.id, GFP_KERNEL); 6042 } 6043 6044 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev, 6045 struct net_device *netdev, u32 cmd) 6046 { 6047 struct sk_buff *msg; 6048 6049 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); 6050 if (!msg) 6051 return; 6052 6053 if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) { 6054 nlmsg_free(msg); 6055 return; 6056 } 6057 6058 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0, 6059 nl80211_scan_mcgrp.id, GFP_KERNEL); 6060 } 6061 6062 /* 6063 * This can happen on global regulatory changes or device specific settings 6064 * based on custom world regulatory domains. 6065 */ 6066 void nl80211_send_reg_change_event(struct regulatory_request *request) 6067 { 6068 struct sk_buff *msg; 6069 void *hdr; 6070 6071 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 6072 if (!msg) 6073 return; 6074 6075 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE); 6076 if (!hdr) { 6077 nlmsg_free(msg); 6078 return; 6079 } 6080 6081 /* Userspace can always count this one always being set */ 6082 NLA_PUT_U8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator); 6083 6084 if (request->alpha2[0] == '0' && request->alpha2[1] == '0') 6085 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE, 6086 NL80211_REGDOM_TYPE_WORLD); 6087 else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') 6088 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE, 6089 NL80211_REGDOM_TYPE_CUSTOM_WORLD); 6090 else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') || 6091 request->intersect) 6092 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE, 6093 NL80211_REGDOM_TYPE_INTERSECTION); 6094 else { 6095 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE, 6096 NL80211_REGDOM_TYPE_COUNTRY); 6097 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, request->alpha2); 6098 } 6099 6100 if (wiphy_idx_valid(request->wiphy_idx)) 6101 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx); 6102 6103 if (genlmsg_end(msg, hdr) < 0) { 6104 nlmsg_free(msg); 6105 return; 6106 } 6107 6108 rcu_read_lock(); 6109 genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id, 6110 GFP_ATOMIC); 6111 rcu_read_unlock(); 6112 6113 return; 6114 6115 nla_put_failure: 6116 genlmsg_cancel(msg, hdr); 6117 nlmsg_free(msg); 6118 } 6119 6120 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev, 6121 struct net_device *netdev, 6122 const u8 *buf, size_t len, 6123 enum nl80211_commands cmd, gfp_t gfp) 6124 { 6125 struct sk_buff *msg; 6126 void *hdr; 6127 6128 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp); 6129 if (!msg) 6130 return; 6131 6132 hdr = nl80211hdr_put(msg, 0, 0, 0, cmd); 6133 if (!hdr) { 6134 nlmsg_free(msg); 6135 return; 6136 } 6137 6138 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx); 6139 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex); 6140 NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf); 6141 6142 if (genlmsg_end(msg, hdr) < 0) { 6143 nlmsg_free(msg); 6144 return; 6145 } 6146 6147 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0, 6148 nl80211_mlme_mcgrp.id, gfp); 6149 return; 6150 6151 nla_put_failure: 6152 genlmsg_cancel(msg, hdr); 6153 nlmsg_free(msg); 6154 } 6155 6156 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev, 6157 struct net_device *netdev, const u8 *buf, 6158 size_t len, gfp_t gfp) 6159 { 6160 nl80211_send_mlme_event(rdev, netdev, buf, len, 6161 NL80211_CMD_AUTHENTICATE, gfp); 6162 } 6163 6164 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev, 6165 struct net_device *netdev, const u8 *buf, 6166 size_t len, gfp_t gfp) 6167 { 6168 nl80211_send_mlme_event(rdev, netdev, buf, len, 6169 NL80211_CMD_ASSOCIATE, gfp); 6170 } 6171 6172 void nl80211_send_deauth(struct cfg80211_registered_device *rdev, 6173 struct net_device *netdev, const u8 *buf, 6174 size_t len, gfp_t gfp) 6175 { 6176 nl80211_send_mlme_event(rdev, netdev, buf, len, 6177 NL80211_CMD_DEAUTHENTICATE, gfp); 6178 } 6179 6180 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev, 6181 struct net_device *netdev, const u8 *buf, 6182 size_t len, gfp_t gfp) 6183 { 6184 nl80211_send_mlme_event(rdev, netdev, buf, len, 6185 NL80211_CMD_DISASSOCIATE, gfp); 6186 } 6187 6188 void nl80211_send_unprot_deauth(struct cfg80211_registered_device *rdev, 6189 struct net_device *netdev, const u8 *buf, 6190 size_t len, gfp_t gfp) 6191 { 6192 nl80211_send_mlme_event(rdev, netdev, buf, len, 6193 NL80211_CMD_UNPROT_DEAUTHENTICATE, gfp); 6194 } 6195 6196 void nl80211_send_unprot_disassoc(struct cfg80211_registered_device *rdev, 6197 struct net_device *netdev, const u8 *buf, 6198 size_t len, gfp_t gfp) 6199 { 6200 nl80211_send_mlme_event(rdev, netdev, buf, len, 6201 NL80211_CMD_UNPROT_DISASSOCIATE, gfp); 6202 } 6203 6204 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev, 6205 struct net_device *netdev, int cmd, 6206 const u8 *addr, gfp_t gfp) 6207 { 6208 struct sk_buff *msg; 6209 void *hdr; 6210 6211 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp); 6212 if (!msg) 6213 return; 6214 6215 hdr = nl80211hdr_put(msg, 0, 0, 0, cmd); 6216 if (!hdr) { 6217 nlmsg_free(msg); 6218 return; 6219 } 6220 6221 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx); 6222 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex); 6223 NLA_PUT_FLAG(msg, NL80211_ATTR_TIMED_OUT); 6224 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr); 6225 6226 if (genlmsg_end(msg, hdr) < 0) { 6227 nlmsg_free(msg); 6228 return; 6229 } 6230 6231 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0, 6232 nl80211_mlme_mcgrp.id, gfp); 6233 return; 6234 6235 nla_put_failure: 6236 genlmsg_cancel(msg, hdr); 6237 nlmsg_free(msg); 6238 } 6239 6240 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev, 6241 struct net_device *netdev, const u8 *addr, 6242 gfp_t gfp) 6243 { 6244 nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE, 6245 addr, gfp); 6246 } 6247 6248 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev, 6249 struct net_device *netdev, const u8 *addr, 6250 gfp_t gfp) 6251 { 6252 nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE, 6253 addr, gfp); 6254 } 6255 6256 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev, 6257 struct net_device *netdev, const u8 *bssid, 6258 const u8 *req_ie, size_t req_ie_len, 6259 const u8 *resp_ie, size_t resp_ie_len, 6260 u16 status, gfp_t gfp) 6261 { 6262 struct sk_buff *msg; 6263 void *hdr; 6264 6265 msg = nlmsg_new(NLMSG_GOODSIZE, gfp); 6266 if (!msg) 6267 return; 6268 6269 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT); 6270 if (!hdr) { 6271 nlmsg_free(msg); 6272 return; 6273 } 6274 6275 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx); 6276 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex); 6277 if (bssid) 6278 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid); 6279 NLA_PUT_U16(msg, NL80211_ATTR_STATUS_CODE, status); 6280 if (req_ie) 6281 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie); 6282 if (resp_ie) 6283 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie); 6284 6285 if (genlmsg_end(msg, hdr) < 0) { 6286 nlmsg_free(msg); 6287 return; 6288 } 6289 6290 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0, 6291 nl80211_mlme_mcgrp.id, gfp); 6292 return; 6293 6294 nla_put_failure: 6295 genlmsg_cancel(msg, hdr); 6296 nlmsg_free(msg); 6297 6298 } 6299 6300 void nl80211_send_roamed(struct cfg80211_registered_device *rdev, 6301 struct net_device *netdev, const u8 *bssid, 6302 const u8 *req_ie, size_t req_ie_len, 6303 const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp) 6304 { 6305 struct sk_buff *msg; 6306 void *hdr; 6307 6308 msg = nlmsg_new(NLMSG_GOODSIZE, gfp); 6309 if (!msg) 6310 return; 6311 6312 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM); 6313 if (!hdr) { 6314 nlmsg_free(msg); 6315 return; 6316 } 6317 6318 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx); 6319 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex); 6320 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid); 6321 if (req_ie) 6322 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie); 6323 if (resp_ie) 6324 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie); 6325 6326 if (genlmsg_end(msg, hdr) < 0) { 6327 nlmsg_free(msg); 6328 return; 6329 } 6330 6331 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0, 6332 nl80211_mlme_mcgrp.id, gfp); 6333 return; 6334 6335 nla_put_failure: 6336 genlmsg_cancel(msg, hdr); 6337 nlmsg_free(msg); 6338 6339 } 6340 6341 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev, 6342 struct net_device *netdev, u16 reason, 6343 const u8 *ie, size_t ie_len, bool from_ap) 6344 { 6345 struct sk_buff *msg; 6346 void *hdr; 6347 6348 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); 6349 if (!msg) 6350 return; 6351 6352 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT); 6353 if (!hdr) { 6354 nlmsg_free(msg); 6355 return; 6356 } 6357 6358 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx); 6359 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex); 6360 if (from_ap && reason) 6361 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason); 6362 if (from_ap) 6363 NLA_PUT_FLAG(msg, NL80211_ATTR_DISCONNECTED_BY_AP); 6364 if (ie) 6365 NLA_PUT(msg, NL80211_ATTR_IE, ie_len, ie); 6366 6367 if (genlmsg_end(msg, hdr) < 0) { 6368 nlmsg_free(msg); 6369 return; 6370 } 6371 6372 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0, 6373 nl80211_mlme_mcgrp.id, GFP_KERNEL); 6374 return; 6375 6376 nla_put_failure: 6377 genlmsg_cancel(msg, hdr); 6378 nlmsg_free(msg); 6379 6380 } 6381 6382 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev, 6383 struct net_device *netdev, const u8 *bssid, 6384 gfp_t gfp) 6385 { 6386 struct sk_buff *msg; 6387 void *hdr; 6388 6389 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp); 6390 if (!msg) 6391 return; 6392 6393 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS); 6394 if (!hdr) { 6395 nlmsg_free(msg); 6396 return; 6397 } 6398 6399 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx); 6400 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex); 6401 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid); 6402 6403 if (genlmsg_end(msg, hdr) < 0) { 6404 nlmsg_free(msg); 6405 return; 6406 } 6407 6408 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0, 6409 nl80211_mlme_mcgrp.id, gfp); 6410 return; 6411 6412 nla_put_failure: 6413 genlmsg_cancel(msg, hdr); 6414 nlmsg_free(msg); 6415 } 6416 6417 void nl80211_send_new_peer_candidate(struct cfg80211_registered_device *rdev, 6418 struct net_device *netdev, 6419 const u8 *macaddr, const u8* ie, u8 ie_len, 6420 gfp_t gfp) 6421 { 6422 struct sk_buff *msg; 6423 void *hdr; 6424 6425 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp); 6426 if (!msg) 6427 return; 6428 6429 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE); 6430 if (!hdr) { 6431 nlmsg_free(msg); 6432 return; 6433 } 6434 6435 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx); 6436 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex); 6437 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, macaddr); 6438 if (ie_len && ie) 6439 NLA_PUT(msg, NL80211_ATTR_IE, ie_len , ie); 6440 6441 if (genlmsg_end(msg, hdr) < 0) { 6442 nlmsg_free(msg); 6443 return; 6444 } 6445 6446 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0, 6447 nl80211_mlme_mcgrp.id, gfp); 6448 return; 6449 6450 nla_put_failure: 6451 genlmsg_cancel(msg, hdr); 6452 nlmsg_free(msg); 6453 } 6454 6455 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev, 6456 struct net_device *netdev, const u8 *addr, 6457 enum nl80211_key_type key_type, int key_id, 6458 const u8 *tsc, gfp_t gfp) 6459 { 6460 struct sk_buff *msg; 6461 void *hdr; 6462 6463 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp); 6464 if (!msg) 6465 return; 6466 6467 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE); 6468 if (!hdr) { 6469 nlmsg_free(msg); 6470 return; 6471 } 6472 6473 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx); 6474 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex); 6475 if (addr) 6476 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr); 6477 NLA_PUT_U32(msg, NL80211_ATTR_KEY_TYPE, key_type); 6478 if (key_id != -1) 6479 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_id); 6480 if (tsc) 6481 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, 6, tsc); 6482 6483 if (genlmsg_end(msg, hdr) < 0) { 6484 nlmsg_free(msg); 6485 return; 6486 } 6487 6488 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0, 6489 nl80211_mlme_mcgrp.id, gfp); 6490 return; 6491 6492 nla_put_failure: 6493 genlmsg_cancel(msg, hdr); 6494 nlmsg_free(msg); 6495 } 6496 6497 void nl80211_send_beacon_hint_event(struct wiphy *wiphy, 6498 struct ieee80211_channel *channel_before, 6499 struct ieee80211_channel *channel_after) 6500 { 6501 struct sk_buff *msg; 6502 void *hdr; 6503 struct nlattr *nl_freq; 6504 6505 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); 6506 if (!msg) 6507 return; 6508 6509 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT); 6510 if (!hdr) { 6511 nlmsg_free(msg); 6512 return; 6513 } 6514 6515 /* 6516 * Since we are applying the beacon hint to a wiphy we know its 6517 * wiphy_idx is valid 6518 */ 6519 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)); 6520 6521 /* Before */ 6522 nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE); 6523 if (!nl_freq) 6524 goto nla_put_failure; 6525 if (nl80211_msg_put_channel(msg, channel_before)) 6526 goto nla_put_failure; 6527 nla_nest_end(msg, nl_freq); 6528 6529 /* After */ 6530 nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER); 6531 if (!nl_freq) 6532 goto nla_put_failure; 6533 if (nl80211_msg_put_channel(msg, channel_after)) 6534 goto nla_put_failure; 6535 nla_nest_end(msg, nl_freq); 6536 6537 if (genlmsg_end(msg, hdr) < 0) { 6538 nlmsg_free(msg); 6539 return; 6540 } 6541 6542 rcu_read_lock(); 6543 genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id, 6544 GFP_ATOMIC); 6545 rcu_read_unlock(); 6546 6547 return; 6548 6549 nla_put_failure: 6550 genlmsg_cancel(msg, hdr); 6551 nlmsg_free(msg); 6552 } 6553 6554 static void nl80211_send_remain_on_chan_event( 6555 int cmd, struct cfg80211_registered_device *rdev, 6556 struct net_device *netdev, u64 cookie, 6557 struct ieee80211_channel *chan, 6558 enum nl80211_channel_type channel_type, 6559 unsigned int duration, gfp_t gfp) 6560 { 6561 struct sk_buff *msg; 6562 void *hdr; 6563 6564 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp); 6565 if (!msg) 6566 return; 6567 6568 hdr = nl80211hdr_put(msg, 0, 0, 0, cmd); 6569 if (!hdr) { 6570 nlmsg_free(msg); 6571 return; 6572 } 6573 6574 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx); 6575 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex); 6576 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq); 6577 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, channel_type); 6578 NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie); 6579 6580 if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL) 6581 NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration); 6582 6583 if (genlmsg_end(msg, hdr) < 0) { 6584 nlmsg_free(msg); 6585 return; 6586 } 6587 6588 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0, 6589 nl80211_mlme_mcgrp.id, gfp); 6590 return; 6591 6592 nla_put_failure: 6593 genlmsg_cancel(msg, hdr); 6594 nlmsg_free(msg); 6595 } 6596 6597 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev, 6598 struct net_device *netdev, u64 cookie, 6599 struct ieee80211_channel *chan, 6600 enum nl80211_channel_type channel_type, 6601 unsigned int duration, gfp_t gfp) 6602 { 6603 nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL, 6604 rdev, netdev, cookie, chan, 6605 channel_type, duration, gfp); 6606 } 6607 6608 void nl80211_send_remain_on_channel_cancel( 6609 struct cfg80211_registered_device *rdev, struct net_device *netdev, 6610 u64 cookie, struct ieee80211_channel *chan, 6611 enum nl80211_channel_type channel_type, gfp_t gfp) 6612 { 6613 nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL, 6614 rdev, netdev, cookie, chan, 6615 channel_type, 0, gfp); 6616 } 6617 6618 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev, 6619 struct net_device *dev, const u8 *mac_addr, 6620 struct station_info *sinfo, gfp_t gfp) 6621 { 6622 struct sk_buff *msg; 6623 6624 msg = nlmsg_new(NLMSG_GOODSIZE, gfp); 6625 if (!msg) 6626 return; 6627 6628 if (nl80211_send_station(msg, 0, 0, 0, dev, mac_addr, sinfo) < 0) { 6629 nlmsg_free(msg); 6630 return; 6631 } 6632 6633 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0, 6634 nl80211_mlme_mcgrp.id, gfp); 6635 } 6636 6637 void nl80211_send_sta_del_event(struct cfg80211_registered_device *rdev, 6638 struct net_device *dev, const u8 *mac_addr, 6639 gfp_t gfp) 6640 { 6641 struct sk_buff *msg; 6642 void *hdr; 6643 6644 msg = nlmsg_new(NLMSG_GOODSIZE, gfp); 6645 if (!msg) 6646 return; 6647 6648 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION); 6649 if (!hdr) { 6650 nlmsg_free(msg); 6651 return; 6652 } 6653 6654 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex); 6655 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr); 6656 6657 if (genlmsg_end(msg, hdr) < 0) { 6658 nlmsg_free(msg); 6659 return; 6660 } 6661 6662 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0, 6663 nl80211_mlme_mcgrp.id, gfp); 6664 return; 6665 6666 nla_put_failure: 6667 genlmsg_cancel(msg, hdr); 6668 nlmsg_free(msg); 6669 } 6670 6671 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev, 6672 struct net_device *netdev, u32 nlpid, 6673 int freq, const u8 *buf, size_t len, gfp_t gfp) 6674 { 6675 struct sk_buff *msg; 6676 void *hdr; 6677 int err; 6678 6679 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp); 6680 if (!msg) 6681 return -ENOMEM; 6682 6683 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME); 6684 if (!hdr) { 6685 nlmsg_free(msg); 6686 return -ENOMEM; 6687 } 6688 6689 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx); 6690 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex); 6691 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq); 6692 NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf); 6693 6694 err = genlmsg_end(msg, hdr); 6695 if (err < 0) { 6696 nlmsg_free(msg); 6697 return err; 6698 } 6699 6700 err = genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid); 6701 if (err < 0) 6702 return err; 6703 return 0; 6704 6705 nla_put_failure: 6706 genlmsg_cancel(msg, hdr); 6707 nlmsg_free(msg); 6708 return -ENOBUFS; 6709 } 6710 6711 void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev, 6712 struct net_device *netdev, u64 cookie, 6713 const u8 *buf, size_t len, bool ack, 6714 gfp_t gfp) 6715 { 6716 struct sk_buff *msg; 6717 void *hdr; 6718 6719 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp); 6720 if (!msg) 6721 return; 6722 6723 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS); 6724 if (!hdr) { 6725 nlmsg_free(msg); 6726 return; 6727 } 6728 6729 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx); 6730 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex); 6731 NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf); 6732 NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie); 6733 if (ack) 6734 NLA_PUT_FLAG(msg, NL80211_ATTR_ACK); 6735 6736 if (genlmsg_end(msg, hdr) < 0) { 6737 nlmsg_free(msg); 6738 return; 6739 } 6740 6741 genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp); 6742 return; 6743 6744 nla_put_failure: 6745 genlmsg_cancel(msg, hdr); 6746 nlmsg_free(msg); 6747 } 6748 6749 void 6750 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev, 6751 struct net_device *netdev, 6752 enum nl80211_cqm_rssi_threshold_event rssi_event, 6753 gfp_t gfp) 6754 { 6755 struct sk_buff *msg; 6756 struct nlattr *pinfoattr; 6757 void *hdr; 6758 6759 msg = nlmsg_new(NLMSG_GOODSIZE, gfp); 6760 if (!msg) 6761 return; 6762 6763 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM); 6764 if (!hdr) { 6765 nlmsg_free(msg); 6766 return; 6767 } 6768 6769 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx); 6770 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex); 6771 6772 pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM); 6773 if (!pinfoattr) 6774 goto nla_put_failure; 6775 6776 NLA_PUT_U32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT, 6777 rssi_event); 6778 6779 nla_nest_end(msg, pinfoattr); 6780 6781 if (genlmsg_end(msg, hdr) < 0) { 6782 nlmsg_free(msg); 6783 return; 6784 } 6785 6786 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0, 6787 nl80211_mlme_mcgrp.id, gfp); 6788 return; 6789 6790 nla_put_failure: 6791 genlmsg_cancel(msg, hdr); 6792 nlmsg_free(msg); 6793 } 6794 6795 void 6796 nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev, 6797 struct net_device *netdev, const u8 *peer, 6798 u32 num_packets, gfp_t gfp) 6799 { 6800 struct sk_buff *msg; 6801 struct nlattr *pinfoattr; 6802 void *hdr; 6803 6804 msg = nlmsg_new(NLMSG_GOODSIZE, gfp); 6805 if (!msg) 6806 return; 6807 6808 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM); 6809 if (!hdr) { 6810 nlmsg_free(msg); 6811 return; 6812 } 6813 6814 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx); 6815 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex); 6816 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, peer); 6817 6818 pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM); 6819 if (!pinfoattr) 6820 goto nla_put_failure; 6821 6822 NLA_PUT_U32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets); 6823 6824 nla_nest_end(msg, pinfoattr); 6825 6826 if (genlmsg_end(msg, hdr) < 0) { 6827 nlmsg_free(msg); 6828 return; 6829 } 6830 6831 genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0, 6832 nl80211_mlme_mcgrp.id, gfp); 6833 return; 6834 6835 nla_put_failure: 6836 genlmsg_cancel(msg, hdr); 6837 nlmsg_free(msg); 6838 } 6839 6840 static int nl80211_netlink_notify(struct notifier_block * nb, 6841 unsigned long state, 6842 void *_notify) 6843 { 6844 struct netlink_notify *notify = _notify; 6845 struct cfg80211_registered_device *rdev; 6846 struct wireless_dev *wdev; 6847 6848 if (state != NETLINK_URELEASE) 6849 return NOTIFY_DONE; 6850 6851 rcu_read_lock(); 6852 6853 list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) 6854 list_for_each_entry_rcu(wdev, &rdev->netdev_list, list) 6855 cfg80211_mlme_unregister_socket(wdev, notify->pid); 6856 6857 rcu_read_unlock(); 6858 6859 return NOTIFY_DONE; 6860 } 6861 6862 static struct notifier_block nl80211_netlink_notifier = { 6863 .notifier_call = nl80211_netlink_notify, 6864 }; 6865 6866 /* initialisation/exit functions */ 6867 6868 int nl80211_init(void) 6869 { 6870 int err; 6871 6872 err = genl_register_family_with_ops(&nl80211_fam, 6873 nl80211_ops, ARRAY_SIZE(nl80211_ops)); 6874 if (err) 6875 return err; 6876 6877 err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp); 6878 if (err) 6879 goto err_out; 6880 6881 err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp); 6882 if (err) 6883 goto err_out; 6884 6885 err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp); 6886 if (err) 6887 goto err_out; 6888 6889 err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp); 6890 if (err) 6891 goto err_out; 6892 6893 #ifdef CONFIG_NL80211_TESTMODE 6894 err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp); 6895 if (err) 6896 goto err_out; 6897 #endif 6898 6899 err = netlink_register_notifier(&nl80211_netlink_notifier); 6900 if (err) 6901 goto err_out; 6902 6903 return 0; 6904 err_out: 6905 genl_unregister_family(&nl80211_fam); 6906 return err; 6907 } 6908 6909 void nl80211_exit(void) 6910 { 6911 netlink_unregister_notifier(&nl80211_netlink_notifier); 6912 genl_unregister_family(&nl80211_fam); 6913 } 6914