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