1 /* 2 * Wireless utility functions 3 * 4 * Copyright 2007-2009 Johannes Berg <johannes@sipsolutions.net> 5 */ 6 #include <linux/bitops.h> 7 #include <linux/etherdevice.h> 8 #include <net/cfg80211.h> 9 #include <net/ip.h> 10 #include "core.h" 11 12 struct ieee80211_rate * 13 ieee80211_get_response_rate(struct ieee80211_supported_band *sband, 14 u32 basic_rates, int bitrate) 15 { 16 struct ieee80211_rate *result = &sband->bitrates[0]; 17 int i; 18 19 for (i = 0; i < sband->n_bitrates; i++) { 20 if (!(basic_rates & BIT(i))) 21 continue; 22 if (sband->bitrates[i].bitrate > bitrate) 23 continue; 24 result = &sband->bitrates[i]; 25 } 26 27 return result; 28 } 29 EXPORT_SYMBOL(ieee80211_get_response_rate); 30 31 int ieee80211_channel_to_frequency(int chan) 32 { 33 if (chan < 14) 34 return 2407 + chan * 5; 35 36 if (chan == 14) 37 return 2484; 38 39 /* FIXME: 802.11j 17.3.8.3.2 */ 40 return (chan + 1000) * 5; 41 } 42 EXPORT_SYMBOL(ieee80211_channel_to_frequency); 43 44 int ieee80211_frequency_to_channel(int freq) 45 { 46 if (freq == 2484) 47 return 14; 48 49 if (freq < 2484) 50 return (freq - 2407) / 5; 51 52 /* FIXME: 802.11j 17.3.8.3.2 */ 53 return freq/5 - 1000; 54 } 55 EXPORT_SYMBOL(ieee80211_frequency_to_channel); 56 57 struct ieee80211_channel *__ieee80211_get_channel(struct wiphy *wiphy, 58 int freq) 59 { 60 enum ieee80211_band band; 61 struct ieee80211_supported_band *sband; 62 int i; 63 64 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 65 sband = wiphy->bands[band]; 66 67 if (!sband) 68 continue; 69 70 for (i = 0; i < sband->n_channels; i++) { 71 if (sband->channels[i].center_freq == freq) 72 return &sband->channels[i]; 73 } 74 } 75 76 return NULL; 77 } 78 EXPORT_SYMBOL(__ieee80211_get_channel); 79 80 static void set_mandatory_flags_band(struct ieee80211_supported_band *sband, 81 enum ieee80211_band band) 82 { 83 int i, want; 84 85 switch (band) { 86 case IEEE80211_BAND_5GHZ: 87 want = 3; 88 for (i = 0; i < sband->n_bitrates; i++) { 89 if (sband->bitrates[i].bitrate == 60 || 90 sband->bitrates[i].bitrate == 120 || 91 sband->bitrates[i].bitrate == 240) { 92 sband->bitrates[i].flags |= 93 IEEE80211_RATE_MANDATORY_A; 94 want--; 95 } 96 } 97 WARN_ON(want); 98 break; 99 case IEEE80211_BAND_2GHZ: 100 want = 7; 101 for (i = 0; i < sband->n_bitrates; i++) { 102 if (sband->bitrates[i].bitrate == 10) { 103 sband->bitrates[i].flags |= 104 IEEE80211_RATE_MANDATORY_B | 105 IEEE80211_RATE_MANDATORY_G; 106 want--; 107 } 108 109 if (sband->bitrates[i].bitrate == 20 || 110 sband->bitrates[i].bitrate == 55 || 111 sband->bitrates[i].bitrate == 110 || 112 sband->bitrates[i].bitrate == 60 || 113 sband->bitrates[i].bitrate == 120 || 114 sband->bitrates[i].bitrate == 240) { 115 sband->bitrates[i].flags |= 116 IEEE80211_RATE_MANDATORY_G; 117 want--; 118 } 119 120 if (sband->bitrates[i].bitrate != 10 && 121 sband->bitrates[i].bitrate != 20 && 122 sband->bitrates[i].bitrate != 55 && 123 sband->bitrates[i].bitrate != 110) 124 sband->bitrates[i].flags |= 125 IEEE80211_RATE_ERP_G; 126 } 127 WARN_ON(want != 0 && want != 3 && want != 6); 128 break; 129 case IEEE80211_NUM_BANDS: 130 WARN_ON(1); 131 break; 132 } 133 } 134 135 void ieee80211_set_bitrate_flags(struct wiphy *wiphy) 136 { 137 enum ieee80211_band band; 138 139 for (band = 0; band < IEEE80211_NUM_BANDS; band++) 140 if (wiphy->bands[band]) 141 set_mandatory_flags_band(wiphy->bands[band], band); 142 } 143 144 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, 145 struct key_params *params, int key_idx, 146 const u8 *mac_addr) 147 { 148 int i; 149 150 if (key_idx > 5) 151 return -EINVAL; 152 153 /* 154 * Disallow pairwise keys with non-zero index unless it's WEP 155 * (because current deployments use pairwise WEP keys with 156 * non-zero indizes but 802.11i clearly specifies to use zero) 157 */ 158 if (mac_addr && key_idx && 159 params->cipher != WLAN_CIPHER_SUITE_WEP40 && 160 params->cipher != WLAN_CIPHER_SUITE_WEP104) 161 return -EINVAL; 162 163 switch (params->cipher) { 164 case WLAN_CIPHER_SUITE_WEP40: 165 if (params->key_len != WLAN_KEY_LEN_WEP40) 166 return -EINVAL; 167 break; 168 case WLAN_CIPHER_SUITE_TKIP: 169 if (params->key_len != WLAN_KEY_LEN_TKIP) 170 return -EINVAL; 171 break; 172 case WLAN_CIPHER_SUITE_CCMP: 173 if (params->key_len != WLAN_KEY_LEN_CCMP) 174 return -EINVAL; 175 break; 176 case WLAN_CIPHER_SUITE_WEP104: 177 if (params->key_len != WLAN_KEY_LEN_WEP104) 178 return -EINVAL; 179 break; 180 case WLAN_CIPHER_SUITE_AES_CMAC: 181 if (params->key_len != WLAN_KEY_LEN_AES_CMAC) 182 return -EINVAL; 183 break; 184 default: 185 return -EINVAL; 186 } 187 188 if (params->seq) { 189 switch (params->cipher) { 190 case WLAN_CIPHER_SUITE_WEP40: 191 case WLAN_CIPHER_SUITE_WEP104: 192 /* These ciphers do not use key sequence */ 193 return -EINVAL; 194 case WLAN_CIPHER_SUITE_TKIP: 195 case WLAN_CIPHER_SUITE_CCMP: 196 case WLAN_CIPHER_SUITE_AES_CMAC: 197 if (params->seq_len != 6) 198 return -EINVAL; 199 break; 200 } 201 } 202 203 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) 204 if (params->cipher == rdev->wiphy.cipher_suites[i]) 205 break; 206 if (i == rdev->wiphy.n_cipher_suites) 207 return -EINVAL; 208 209 return 0; 210 } 211 212 /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */ 213 /* Ethernet-II snap header (RFC1042 for most EtherTypes) */ 214 const unsigned char rfc1042_header[] __aligned(2) = 215 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 }; 216 EXPORT_SYMBOL(rfc1042_header); 217 218 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */ 219 const unsigned char bridge_tunnel_header[] __aligned(2) = 220 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 }; 221 EXPORT_SYMBOL(bridge_tunnel_header); 222 223 unsigned int ieee80211_hdrlen(__le16 fc) 224 { 225 unsigned int hdrlen = 24; 226 227 if (ieee80211_is_data(fc)) { 228 if (ieee80211_has_a4(fc)) 229 hdrlen = 30; 230 if (ieee80211_is_data_qos(fc)) 231 hdrlen += IEEE80211_QOS_CTL_LEN; 232 goto out; 233 } 234 235 if (ieee80211_is_ctl(fc)) { 236 /* 237 * ACK and CTS are 10 bytes, all others 16. To see how 238 * to get this condition consider 239 * subtype mask: 0b0000000011110000 (0x00F0) 240 * ACK subtype: 0b0000000011010000 (0x00D0) 241 * CTS subtype: 0b0000000011000000 (0x00C0) 242 * bits that matter: ^^^ (0x00E0) 243 * value of those: 0b0000000011000000 (0x00C0) 244 */ 245 if ((fc & cpu_to_le16(0x00E0)) == cpu_to_le16(0x00C0)) 246 hdrlen = 10; 247 else 248 hdrlen = 16; 249 } 250 out: 251 return hdrlen; 252 } 253 EXPORT_SYMBOL(ieee80211_hdrlen); 254 255 unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb) 256 { 257 const struct ieee80211_hdr *hdr = 258 (const struct ieee80211_hdr *)skb->data; 259 unsigned int hdrlen; 260 261 if (unlikely(skb->len < 10)) 262 return 0; 263 hdrlen = ieee80211_hdrlen(hdr->frame_control); 264 if (unlikely(hdrlen > skb->len)) 265 return 0; 266 return hdrlen; 267 } 268 EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb); 269 270 static int ieee80211_get_mesh_hdrlen(struct ieee80211s_hdr *meshhdr) 271 { 272 int ae = meshhdr->flags & MESH_FLAGS_AE; 273 /* 7.1.3.5a.2 */ 274 switch (ae) { 275 case 0: 276 return 6; 277 case MESH_FLAGS_AE_A4: 278 return 12; 279 case MESH_FLAGS_AE_A5_A6: 280 return 18; 281 case (MESH_FLAGS_AE_A4 | MESH_FLAGS_AE_A5_A6): 282 return 24; 283 default: 284 return 6; 285 } 286 } 287 288 int ieee80211_data_to_8023(struct sk_buff *skb, u8 *addr, 289 enum nl80211_iftype iftype) 290 { 291 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; 292 u16 hdrlen, ethertype; 293 u8 *payload; 294 u8 dst[ETH_ALEN]; 295 u8 src[ETH_ALEN] __aligned(2); 296 297 if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) 298 return -1; 299 300 hdrlen = ieee80211_hdrlen(hdr->frame_control); 301 302 /* convert IEEE 802.11 header + possible LLC headers into Ethernet 303 * header 304 * IEEE 802.11 address fields: 305 * ToDS FromDS Addr1 Addr2 Addr3 Addr4 306 * 0 0 DA SA BSSID n/a 307 * 0 1 DA BSSID SA n/a 308 * 1 0 BSSID SA DA n/a 309 * 1 1 RA TA DA SA 310 */ 311 memcpy(dst, ieee80211_get_DA(hdr), ETH_ALEN); 312 memcpy(src, ieee80211_get_SA(hdr), ETH_ALEN); 313 314 switch (hdr->frame_control & 315 cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) { 316 case cpu_to_le16(IEEE80211_FCTL_TODS): 317 if (unlikely(iftype != NL80211_IFTYPE_AP && 318 iftype != NL80211_IFTYPE_AP_VLAN)) 319 return -1; 320 break; 321 case cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS): 322 if (unlikely(iftype != NL80211_IFTYPE_WDS && 323 iftype != NL80211_IFTYPE_MESH_POINT)) 324 return -1; 325 if (iftype == NL80211_IFTYPE_MESH_POINT) { 326 struct ieee80211s_hdr *meshdr = 327 (struct ieee80211s_hdr *) (skb->data + hdrlen); 328 hdrlen += ieee80211_get_mesh_hdrlen(meshdr); 329 if (meshdr->flags & MESH_FLAGS_AE_A5_A6) { 330 memcpy(dst, meshdr->eaddr1, ETH_ALEN); 331 memcpy(src, meshdr->eaddr2, ETH_ALEN); 332 } 333 } 334 break; 335 case cpu_to_le16(IEEE80211_FCTL_FROMDS): 336 if ((iftype != NL80211_IFTYPE_STATION && 337 iftype != NL80211_IFTYPE_MESH_POINT) || 338 (is_multicast_ether_addr(dst) && 339 !compare_ether_addr(src, addr))) 340 return -1; 341 if (iftype == NL80211_IFTYPE_MESH_POINT) { 342 struct ieee80211s_hdr *meshdr = 343 (struct ieee80211s_hdr *) (skb->data + hdrlen); 344 hdrlen += ieee80211_get_mesh_hdrlen(meshdr); 345 if (meshdr->flags & MESH_FLAGS_AE_A4) 346 memcpy(src, meshdr->eaddr1, ETH_ALEN); 347 } 348 break; 349 case cpu_to_le16(0): 350 if (iftype != NL80211_IFTYPE_ADHOC) 351 return -1; 352 break; 353 } 354 355 if (unlikely(skb->len - hdrlen < 8)) 356 return -1; 357 358 payload = skb->data + hdrlen; 359 ethertype = (payload[6] << 8) | payload[7]; 360 361 if (likely((compare_ether_addr(payload, rfc1042_header) == 0 && 362 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) || 363 compare_ether_addr(payload, bridge_tunnel_header) == 0)) { 364 /* remove RFC1042 or Bridge-Tunnel encapsulation and 365 * replace EtherType */ 366 skb_pull(skb, hdrlen + 6); 367 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN); 368 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN); 369 } else { 370 struct ethhdr *ehdr; 371 __be16 len; 372 373 skb_pull(skb, hdrlen); 374 len = htons(skb->len); 375 ehdr = (struct ethhdr *) skb_push(skb, sizeof(struct ethhdr)); 376 memcpy(ehdr->h_dest, dst, ETH_ALEN); 377 memcpy(ehdr->h_source, src, ETH_ALEN); 378 ehdr->h_proto = len; 379 } 380 return 0; 381 } 382 EXPORT_SYMBOL(ieee80211_data_to_8023); 383 384 int ieee80211_data_from_8023(struct sk_buff *skb, u8 *addr, 385 enum nl80211_iftype iftype, u8 *bssid, bool qos) 386 { 387 struct ieee80211_hdr hdr; 388 u16 hdrlen, ethertype; 389 __le16 fc; 390 const u8 *encaps_data; 391 int encaps_len, skip_header_bytes; 392 int nh_pos, h_pos; 393 int head_need; 394 395 if (unlikely(skb->len < ETH_HLEN)) 396 return -EINVAL; 397 398 nh_pos = skb_network_header(skb) - skb->data; 399 h_pos = skb_transport_header(skb) - skb->data; 400 401 /* convert Ethernet header to proper 802.11 header (based on 402 * operation mode) */ 403 ethertype = (skb->data[12] << 8) | skb->data[13]; 404 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA); 405 406 switch (iftype) { 407 case NL80211_IFTYPE_AP: 408 case NL80211_IFTYPE_AP_VLAN: 409 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); 410 /* DA BSSID SA */ 411 memcpy(hdr.addr1, skb->data, ETH_ALEN); 412 memcpy(hdr.addr2, addr, ETH_ALEN); 413 memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN); 414 hdrlen = 24; 415 break; 416 case NL80211_IFTYPE_STATION: 417 fc |= cpu_to_le16(IEEE80211_FCTL_TODS); 418 /* BSSID SA DA */ 419 memcpy(hdr.addr1, bssid, ETH_ALEN); 420 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); 421 memcpy(hdr.addr3, skb->data, ETH_ALEN); 422 hdrlen = 24; 423 break; 424 case NL80211_IFTYPE_ADHOC: 425 /* DA SA BSSID */ 426 memcpy(hdr.addr1, skb->data, ETH_ALEN); 427 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); 428 memcpy(hdr.addr3, bssid, ETH_ALEN); 429 hdrlen = 24; 430 break; 431 default: 432 return -EOPNOTSUPP; 433 } 434 435 if (qos) { 436 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA); 437 hdrlen += 2; 438 } 439 440 hdr.frame_control = fc; 441 hdr.duration_id = 0; 442 hdr.seq_ctrl = 0; 443 444 skip_header_bytes = ETH_HLEN; 445 if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) { 446 encaps_data = bridge_tunnel_header; 447 encaps_len = sizeof(bridge_tunnel_header); 448 skip_header_bytes -= 2; 449 } else if (ethertype > 0x600) { 450 encaps_data = rfc1042_header; 451 encaps_len = sizeof(rfc1042_header); 452 skip_header_bytes -= 2; 453 } else { 454 encaps_data = NULL; 455 encaps_len = 0; 456 } 457 458 skb_pull(skb, skip_header_bytes); 459 nh_pos -= skip_header_bytes; 460 h_pos -= skip_header_bytes; 461 462 head_need = hdrlen + encaps_len - skb_headroom(skb); 463 464 if (head_need > 0 || skb_cloned(skb)) { 465 head_need = max(head_need, 0); 466 if (head_need) 467 skb_orphan(skb); 468 469 if (pskb_expand_head(skb, head_need, 0, GFP_ATOMIC)) { 470 printk(KERN_ERR "failed to reallocate Tx buffer\n"); 471 return -ENOMEM; 472 } 473 skb->truesize += head_need; 474 } 475 476 if (encaps_data) { 477 memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len); 478 nh_pos += encaps_len; 479 h_pos += encaps_len; 480 } 481 482 memcpy(skb_push(skb, hdrlen), &hdr, hdrlen); 483 484 nh_pos += hdrlen; 485 h_pos += hdrlen; 486 487 /* Update skb pointers to various headers since this modified frame 488 * is going to go through Linux networking code that may potentially 489 * need things like pointer to IP header. */ 490 skb_set_mac_header(skb, 0); 491 skb_set_network_header(skb, nh_pos); 492 skb_set_transport_header(skb, h_pos); 493 494 return 0; 495 } 496 EXPORT_SYMBOL(ieee80211_data_from_8023); 497 498 /* Given a data frame determine the 802.1p/1d tag to use. */ 499 unsigned int cfg80211_classify8021d(struct sk_buff *skb) 500 { 501 unsigned int dscp; 502 503 /* skb->priority values from 256->263 are magic values to 504 * directly indicate a specific 802.1d priority. This is used 505 * to allow 802.1d priority to be passed directly in from VLAN 506 * tags, etc. 507 */ 508 if (skb->priority >= 256 && skb->priority <= 263) 509 return skb->priority - 256; 510 511 switch (skb->protocol) { 512 case htons(ETH_P_IP): 513 dscp = ip_hdr(skb)->tos & 0xfc; 514 break; 515 default: 516 return 0; 517 } 518 519 return dscp >> 5; 520 } 521 EXPORT_SYMBOL(cfg80211_classify8021d); 522 523 const u8 *ieee80211_bss_get_ie(struct cfg80211_bss *bss, u8 ie) 524 { 525 u8 *end, *pos; 526 527 pos = bss->information_elements; 528 if (pos == NULL) 529 return NULL; 530 end = pos + bss->len_information_elements; 531 532 while (pos + 1 < end) { 533 if (pos + 2 + pos[1] > end) 534 break; 535 if (pos[0] == ie) 536 return pos; 537 pos += 2 + pos[1]; 538 } 539 540 return NULL; 541 } 542 EXPORT_SYMBOL(ieee80211_bss_get_ie); 543 544 void cfg80211_upload_connect_keys(struct wireless_dev *wdev) 545 { 546 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 547 struct net_device *dev = wdev->netdev; 548 int i; 549 550 if (!wdev->connect_keys) 551 return; 552 553 for (i = 0; i < 6; i++) { 554 if (!wdev->connect_keys->params[i].cipher) 555 continue; 556 if (rdev->ops->add_key(wdev->wiphy, dev, i, NULL, 557 &wdev->connect_keys->params[i])) { 558 printk(KERN_ERR "%s: failed to set key %d\n", 559 dev->name, i); 560 continue; 561 } 562 if (wdev->connect_keys->def == i) 563 if (rdev->ops->set_default_key(wdev->wiphy, dev, i)) { 564 printk(KERN_ERR "%s: failed to set defkey %d\n", 565 dev->name, i); 566 continue; 567 } 568 if (wdev->connect_keys->defmgmt == i) 569 if (rdev->ops->set_default_mgmt_key(wdev->wiphy, dev, i)) 570 printk(KERN_ERR "%s: failed to set mgtdef %d\n", 571 dev->name, i); 572 } 573 574 kfree(wdev->connect_keys); 575 wdev->connect_keys = NULL; 576 } 577 578 static void cfg80211_process_wdev_events(struct wireless_dev *wdev) 579 { 580 struct cfg80211_event *ev; 581 unsigned long flags; 582 const u8 *bssid = NULL; 583 584 spin_lock_irqsave(&wdev->event_lock, flags); 585 while (!list_empty(&wdev->event_list)) { 586 ev = list_first_entry(&wdev->event_list, 587 struct cfg80211_event, list); 588 list_del(&ev->list); 589 spin_unlock_irqrestore(&wdev->event_lock, flags); 590 591 wdev_lock(wdev); 592 switch (ev->type) { 593 case EVENT_CONNECT_RESULT: 594 if (!is_zero_ether_addr(ev->cr.bssid)) 595 bssid = ev->cr.bssid; 596 __cfg80211_connect_result( 597 wdev->netdev, bssid, 598 ev->cr.req_ie, ev->cr.req_ie_len, 599 ev->cr.resp_ie, ev->cr.resp_ie_len, 600 ev->cr.status, 601 ev->cr.status == WLAN_STATUS_SUCCESS, 602 NULL); 603 break; 604 case EVENT_ROAMED: 605 __cfg80211_roamed(wdev, ev->rm.bssid, 606 ev->rm.req_ie, ev->rm.req_ie_len, 607 ev->rm.resp_ie, ev->rm.resp_ie_len); 608 break; 609 case EVENT_DISCONNECTED: 610 __cfg80211_disconnected(wdev->netdev, 611 ev->dc.ie, ev->dc.ie_len, 612 ev->dc.reason, true); 613 break; 614 case EVENT_IBSS_JOINED: 615 __cfg80211_ibss_joined(wdev->netdev, ev->ij.bssid); 616 break; 617 } 618 wdev_unlock(wdev); 619 620 kfree(ev); 621 622 spin_lock_irqsave(&wdev->event_lock, flags); 623 } 624 spin_unlock_irqrestore(&wdev->event_lock, flags); 625 } 626 627 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev) 628 { 629 struct wireless_dev *wdev; 630 631 ASSERT_RTNL(); 632 ASSERT_RDEV_LOCK(rdev); 633 634 mutex_lock(&rdev->devlist_mtx); 635 636 list_for_each_entry(wdev, &rdev->netdev_list, list) 637 cfg80211_process_wdev_events(wdev); 638 639 mutex_unlock(&rdev->devlist_mtx); 640 } 641 642 int cfg80211_change_iface(struct cfg80211_registered_device *rdev, 643 struct net_device *dev, enum nl80211_iftype ntype, 644 u32 *flags, struct vif_params *params) 645 { 646 int err; 647 enum nl80211_iftype otype = dev->ieee80211_ptr->iftype; 648 649 ASSERT_RDEV_LOCK(rdev); 650 651 /* don't support changing VLANs, you just re-create them */ 652 if (otype == NL80211_IFTYPE_AP_VLAN) 653 return -EOPNOTSUPP; 654 655 if (!rdev->ops->change_virtual_intf || 656 !(rdev->wiphy.interface_modes & (1 << ntype))) 657 return -EOPNOTSUPP; 658 659 if (ntype != otype) { 660 switch (otype) { 661 case NL80211_IFTYPE_ADHOC: 662 cfg80211_leave_ibss(rdev, dev, false); 663 break; 664 case NL80211_IFTYPE_STATION: 665 cfg80211_disconnect(rdev, dev, 666 WLAN_REASON_DEAUTH_LEAVING, true); 667 break; 668 case NL80211_IFTYPE_MESH_POINT: 669 /* mesh should be handled? */ 670 break; 671 default: 672 break; 673 } 674 675 cfg80211_process_rdev_events(rdev); 676 } 677 678 err = rdev->ops->change_virtual_intf(&rdev->wiphy, dev, 679 ntype, flags, params); 680 681 WARN_ON(!err && dev->ieee80211_ptr->iftype != ntype); 682 683 return err; 684 } 685