1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Wireless utility functions 4 * 5 * Copyright 2007-2009 Johannes Berg <johannes@sipsolutions.net> 6 * Copyright 2013-2014 Intel Mobile Communications GmbH 7 * Copyright 2017 Intel Deutschland GmbH 8 * Copyright (C) 2018-2023, 2025-2026 Intel Corporation 9 */ 10 #include <linux/export.h> 11 #include <linux/bitops.h> 12 #include <linux/etherdevice.h> 13 #include <linux/slab.h> 14 #include <linux/ieee80211.h> 15 #include <net/cfg80211.h> 16 #include <net/ip.h> 17 #include <net/dsfield.h> 18 #include <linux/if_vlan.h> 19 #include <linux/mpls.h> 20 #include <linux/gcd.h> 21 #include <linux/bitfield.h> 22 #include <linux/nospec.h> 23 #include "core.h" 24 #include "rdev-ops.h" 25 26 27 const struct ieee80211_rate * 28 ieee80211_get_response_rate(struct ieee80211_supported_band *sband, 29 u32 basic_rates, int bitrate) 30 { 31 struct ieee80211_rate *result = &sband->bitrates[0]; 32 int i; 33 34 for (i = 0; i < sband->n_bitrates; i++) { 35 if (!(basic_rates & BIT(i))) 36 continue; 37 if (sband->bitrates[i].bitrate > bitrate) 38 continue; 39 result = &sband->bitrates[i]; 40 } 41 42 return result; 43 } 44 EXPORT_SYMBOL(ieee80211_get_response_rate); 45 46 u32 ieee80211_mandatory_rates(struct ieee80211_supported_band *sband) 47 { 48 struct ieee80211_rate *bitrates; 49 u32 mandatory_rates = 0; 50 enum ieee80211_rate_flags mandatory_flag; 51 int i; 52 53 if (WARN_ON(!sband)) 54 return 1; 55 56 if (sband->band == NL80211_BAND_2GHZ) 57 mandatory_flag = IEEE80211_RATE_MANDATORY_B; 58 else 59 mandatory_flag = IEEE80211_RATE_MANDATORY_A; 60 61 bitrates = sband->bitrates; 62 for (i = 0; i < sband->n_bitrates; i++) 63 if (bitrates[i].flags & mandatory_flag) 64 mandatory_rates |= BIT(i); 65 return mandatory_rates; 66 } 67 EXPORT_SYMBOL(ieee80211_mandatory_rates); 68 69 u32 ieee80211_channel_to_freq_khz(int chan, enum nl80211_band band) 70 { 71 /* see 802.11 17.3.8.3.2 and Annex J 72 * there are overlapping channel numbers in 5GHz and 2GHz bands */ 73 if (chan <= 0) 74 return 0; /* not supported */ 75 switch (band) { 76 case NL80211_BAND_2GHZ: 77 case NL80211_BAND_LC: 78 if (chan == 14) 79 return MHZ_TO_KHZ(2484); 80 else if (chan < 14) 81 return MHZ_TO_KHZ(2407 + chan * 5); 82 break; 83 case NL80211_BAND_5GHZ: 84 if (chan >= 182 && chan <= 196) 85 return MHZ_TO_KHZ(4000 + chan * 5); 86 else 87 return MHZ_TO_KHZ(5000 + chan * 5); 88 break; 89 case NL80211_BAND_6GHZ: 90 /* see 802.11ax D6.1 27.3.23.2 */ 91 if (chan == 2) 92 return MHZ_TO_KHZ(5935); 93 if (chan <= 253) 94 return MHZ_TO_KHZ(5950 + chan * 5); 95 break; 96 case NL80211_BAND_60GHZ: 97 if (chan < 7) 98 return MHZ_TO_KHZ(56160 + chan * 2160); 99 break; 100 case NL80211_BAND_S1GHZ: 101 return 902000 + chan * 500; 102 default: 103 ; 104 } 105 return 0; /* not supported */ 106 } 107 EXPORT_SYMBOL(ieee80211_channel_to_freq_khz); 108 109 int ieee80211_freq_khz_to_channel(u32 freq) 110 { 111 /* TODO: just handle MHz for now */ 112 freq = KHZ_TO_MHZ(freq); 113 114 /* see 802.11 17.3.8.3.2 and Annex J */ 115 if (freq == 2484) 116 return 14; 117 else if (freq < 2484) 118 return (freq - 2407) / 5; 119 else if (freq >= 4910 && freq <= 4980) 120 return (freq - 4000) / 5; 121 else if (freq < 5925) 122 return (freq - 5000) / 5; 123 else if (freq == 5935) 124 return 2; 125 else if (freq <= 45000) /* DMG band lower limit */ 126 /* see 802.11ax D6.1 27.3.22.2 */ 127 return (freq - 5950) / 5; 128 else if (freq >= 58320 && freq <= 70200) 129 return (freq - 56160) / 2160; 130 else 131 return 0; 132 } 133 EXPORT_SYMBOL(ieee80211_freq_khz_to_channel); 134 135 struct ieee80211_channel *ieee80211_get_channel_khz(struct wiphy *wiphy, 136 u32 freq) 137 { 138 enum nl80211_band band; 139 struct ieee80211_supported_band *sband; 140 int i; 141 142 for (band = 0; band < NUM_NL80211_BANDS; band++) { 143 sband = wiphy->bands[band]; 144 145 if (!sband) 146 continue; 147 148 for (i = 0; i < sband->n_channels; i++) { 149 struct ieee80211_channel *chan = &sband->channels[i]; 150 151 if (ieee80211_channel_to_khz(chan) == freq) 152 return chan; 153 } 154 } 155 156 return NULL; 157 } 158 EXPORT_SYMBOL(ieee80211_get_channel_khz); 159 160 static void set_mandatory_flags_band(struct ieee80211_supported_band *sband) 161 { 162 int i, want; 163 164 switch (sband->band) { 165 case NL80211_BAND_5GHZ: 166 case NL80211_BAND_6GHZ: 167 want = 3; 168 for (i = 0; i < sband->n_bitrates; i++) { 169 if (sband->bitrates[i].bitrate == 60 || 170 sband->bitrates[i].bitrate == 120 || 171 sband->bitrates[i].bitrate == 240) { 172 sband->bitrates[i].flags |= 173 IEEE80211_RATE_MANDATORY_A; 174 want--; 175 } 176 } 177 WARN_ON(want); 178 break; 179 case NL80211_BAND_2GHZ: 180 case NL80211_BAND_LC: 181 want = 7; 182 for (i = 0; i < sband->n_bitrates; i++) { 183 switch (sband->bitrates[i].bitrate) { 184 case 10: 185 case 20: 186 case 55: 187 case 110: 188 sband->bitrates[i].flags |= 189 IEEE80211_RATE_MANDATORY_B | 190 IEEE80211_RATE_MANDATORY_G; 191 want--; 192 break; 193 case 60: 194 case 120: 195 case 240: 196 sband->bitrates[i].flags |= 197 IEEE80211_RATE_MANDATORY_G; 198 want--; 199 fallthrough; 200 default: 201 sband->bitrates[i].flags |= 202 IEEE80211_RATE_ERP_G; 203 break; 204 } 205 } 206 WARN_ON(want != 0 && want != 3); 207 break; 208 case NL80211_BAND_60GHZ: 209 /* check for mandatory HT MCS 1..4 */ 210 WARN_ON(!sband->ht_cap.ht_supported); 211 WARN_ON((sband->ht_cap.mcs.rx_mask[0] & 0x1e) != 0x1e); 212 break; 213 case NL80211_BAND_S1GHZ: 214 /* Figure 9-589bd: 3 means unsupported, so != 3 means at least 215 * mandatory is ok. 216 */ 217 WARN_ON((sband->s1g_cap.nss_mcs[0] & 0x3) == 0x3); 218 break; 219 case NUM_NL80211_BANDS: 220 default: 221 WARN_ON(1); 222 break; 223 } 224 } 225 226 void ieee80211_set_bitrate_flags(struct wiphy *wiphy) 227 { 228 enum nl80211_band band; 229 230 for (band = 0; band < NUM_NL80211_BANDS; band++) 231 if (wiphy->bands[band]) 232 set_mandatory_flags_band(wiphy->bands[band]); 233 } 234 235 bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher) 236 { 237 int i; 238 for (i = 0; i < wiphy->n_cipher_suites; i++) 239 if (cipher == wiphy->cipher_suites[i]) 240 return true; 241 return false; 242 } 243 244 static bool cfg80211_igtk_cipher_supported(struct wiphy *wiphy) 245 { 246 int i; 247 248 for (i = 0; i < wiphy->n_cipher_suites; i++) { 249 switch (wiphy->cipher_suites[i]) { 250 case WLAN_CIPHER_SUITE_AES_CMAC: 251 case WLAN_CIPHER_SUITE_BIP_CMAC_256: 252 case WLAN_CIPHER_SUITE_BIP_GMAC_128: 253 case WLAN_CIPHER_SUITE_BIP_GMAC_256: 254 return true; 255 } 256 } 257 258 return false; 259 } 260 261 bool cfg80211_cigtk_supported(struct wireless_dev *wdev, 262 struct genl_info *info) 263 { 264 const struct wiphy_iftype_ext_capab *ext_capab = 265 cfg80211_get_iftype_ext_capa(wdev->wiphy, wdev->iftype); 266 267 if (ext_capab && ext_capab->cip_supported) 268 return true; 269 270 if (info) 271 GENL_SET_ERR_MSG(info, 272 "Control Integrity Protocol not supported"); 273 274 return false; 275 } 276 277 bool cfg80211_valid_key_idx(struct wireless_dev *wdev, 278 int key_idx, enum nl80211_key_type type, 279 const u8 *mac_addr) 280 { 281 if (WARN_ON(!wdev)) 282 return false; 283 284 if (key_idx < 0) 285 return false; 286 287 /* 288 * Can't differentiate ciphers here so allow 0..3. 289 * Pairwise keys must be for a station (MAC address given). 290 */ 291 if (type == NL80211_KEYTYPE_PAIRWISE) { 292 if (!mac_addr) 293 return false; 294 295 return key_idx < 4; 296 } 297 298 /* Check the wdev/iftype supports CIGTK */ 299 if (type == NL80211_KEYTYPE_CIGTK) { 300 if (!cfg80211_cigtk_supported(wdev, NULL)) 301 return false; 302 303 if (key_idx >= 2) 304 return false; 305 306 /* fallthrough for mac_addr checks */ 307 } 308 309 /* 310 * For group keys, mac_addr==NULL means setting a group key 311 * for TX, which is only supported on some interface types, 312 * except for STATION/P2P_CLIENT, where it's setting the RX 313 * key with the current AP (for legacy reasons.) 314 * 315 * Apart from that exception, a non-NULL mac_addr means RX 316 * key being set. 317 */ 318 319 switch (wdev->iftype) { 320 case NL80211_IFTYPE_ADHOC: 321 if (!(wdev->wiphy->flags & WIPHY_FLAG_IBSS_RSN)) 322 return false; 323 fallthrough; 324 case NL80211_IFTYPE_MESH_POINT: 325 /* no support for IGTK/BIGTK (yet?) */ 326 return key_idx < 4; 327 case NL80211_IFTYPE_NAN_DATA: 328 /* these always need to support per-STA GTK */ 329 return key_idx < 4; 330 case NL80211_IFTYPE_NAN: 331 /* no data */ 332 if (key_idx < 4) 333 return false; 334 /* NAN reused this flag */ 335 if (wiphy_ext_feature_isset(wdev->wiphy, 336 NL80211_EXT_FEATURE_BEACON_PROTECTION)) 337 return key_idx <= 7; 338 return key_idx <= 5; 339 case NL80211_IFTYPE_STATION: 340 case NL80211_IFTYPE_P2P_CLIENT: 341 /* see note about exception above */ 342 if (mac_addr) 343 return false; 344 /* BIGTK support implies IGTK support */ 345 if (wiphy_ext_feature_isset(wdev->wiphy, 346 NL80211_EXT_FEATURE_BEACON_PROTECTION_CLIENT)) 347 return key_idx <= 7; 348 fallthrough; 349 case NL80211_IFTYPE_AP: 350 case NL80211_IFTYPE_P2P_GO: 351 /* no RX with [B]IGTK */ 352 if (mac_addr) 353 return false; 354 if (wiphy_ext_feature_isset(wdev->wiphy, 355 NL80211_EXT_FEATURE_BEACON_PROTECTION)) 356 return key_idx <= 7; 357 fallthrough; 358 case NL80211_IFTYPE_AP_VLAN: 359 /* no RX with GTK */ 360 if (mac_addr) 361 return false; 362 if (cfg80211_igtk_cipher_supported(wdev->wiphy)) 363 return key_idx <= 5; 364 return key_idx <= 3; 365 default: 366 return false; 367 } 368 } 369 370 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, 371 struct wireless_dev *wdev, 372 struct key_params *params, int key_idx, 373 enum nl80211_key_type type, 374 const u8 *mac_addr) 375 { 376 bool pairwise = type == NL80211_KEYTYPE_PAIRWISE; 377 378 if (!cfg80211_valid_key_idx(wdev, key_idx, type, mac_addr)) 379 return -EINVAL; 380 381 switch (params->cipher) { 382 case WLAN_CIPHER_SUITE_TKIP: 383 /* Extended Key ID can only be used with CCMP/GCMP ciphers */ 384 if ((pairwise && key_idx) || 385 params->mode != NL80211_KEY_RX_TX) 386 return -EINVAL; 387 break; 388 case WLAN_CIPHER_SUITE_CCMP: 389 case WLAN_CIPHER_SUITE_CCMP_256: 390 case WLAN_CIPHER_SUITE_GCMP: 391 case WLAN_CIPHER_SUITE_GCMP_256: 392 /* IEEE802.11-2016 allows only 0 and - when supporting 393 * Extended Key ID - 1 as index for pairwise keys. 394 * @NL80211_KEY_NO_TX is only allowed for pairwise keys when 395 * the driver supports Extended Key ID. 396 * @NL80211_KEY_SET_TX can't be set when installing and 397 * validating a key. 398 */ 399 if ((params->mode == NL80211_KEY_NO_TX && !pairwise) || 400 params->mode == NL80211_KEY_SET_TX) 401 return -EINVAL; 402 if (wiphy_ext_feature_isset(&rdev->wiphy, 403 NL80211_EXT_FEATURE_EXT_KEY_ID)) { 404 if (pairwise && (key_idx < 0 || key_idx > 1)) 405 return -EINVAL; 406 } else if (pairwise && key_idx) { 407 return -EINVAL; 408 } 409 break; 410 case WLAN_CIPHER_SUITE_AES_CMAC: 411 case WLAN_CIPHER_SUITE_BIP_CMAC_256: 412 case WLAN_CIPHER_SUITE_BIP_GMAC_128: 413 case WLAN_CIPHER_SUITE_BIP_GMAC_256: 414 /* Disallow BIP (group-only) cipher as pairwise cipher */ 415 if (pairwise) 416 return -EINVAL; 417 if (key_idx < 4) 418 return -EINVAL; 419 break; 420 case WLAN_CIPHER_SUITE_WEP40: 421 case WLAN_CIPHER_SUITE_WEP104: 422 if (key_idx > 3) 423 return -EINVAL; 424 break; 425 default: 426 break; 427 } 428 429 switch (params->cipher) { 430 case WLAN_CIPHER_SUITE_WEP40: 431 case WLAN_CIPHER_SUITE_WEP104: 432 case WLAN_CIPHER_SUITE_TKIP: 433 if (wdev->valid_links) 434 return -EINVAL; 435 break; 436 default: 437 break; 438 } 439 440 /* 441 * Per Wi-Fi Aware v4.0 section 7.1.2, NAN Data interfaces 442 * shall only use CCMP-128 or GCMP-256. 443 */ 444 if (wdev->iftype == NL80211_IFTYPE_NAN_DATA && 445 params->cipher != WLAN_CIPHER_SUITE_CCMP && 446 params->cipher != WLAN_CIPHER_SUITE_GCMP_256) 447 return -EINVAL; 448 449 switch (params->cipher) { 450 case WLAN_CIPHER_SUITE_WEP40: 451 if (params->key_len != WLAN_KEY_LEN_WEP40) 452 return -EINVAL; 453 break; 454 case WLAN_CIPHER_SUITE_TKIP: 455 if (params->key_len != WLAN_KEY_LEN_TKIP) 456 return -EINVAL; 457 break; 458 case WLAN_CIPHER_SUITE_CCMP: 459 if (params->key_len != WLAN_KEY_LEN_CCMP) 460 return -EINVAL; 461 break; 462 case WLAN_CIPHER_SUITE_CCMP_256: 463 if (params->key_len != WLAN_KEY_LEN_CCMP_256) 464 return -EINVAL; 465 break; 466 case WLAN_CIPHER_SUITE_GCMP: 467 if (params->key_len != WLAN_KEY_LEN_GCMP) 468 return -EINVAL; 469 break; 470 case WLAN_CIPHER_SUITE_GCMP_256: 471 if (params->key_len != WLAN_KEY_LEN_GCMP_256) 472 return -EINVAL; 473 break; 474 case WLAN_CIPHER_SUITE_WEP104: 475 if (params->key_len != WLAN_KEY_LEN_WEP104) 476 return -EINVAL; 477 break; 478 case WLAN_CIPHER_SUITE_AES_CMAC: 479 if (params->key_len != WLAN_KEY_LEN_AES_CMAC) 480 return -EINVAL; 481 break; 482 case WLAN_CIPHER_SUITE_BIP_CMAC_256: 483 if (params->key_len != WLAN_KEY_LEN_BIP_CMAC_256) 484 return -EINVAL; 485 break; 486 case WLAN_CIPHER_SUITE_BIP_GMAC_128: 487 if (params->key_len != WLAN_KEY_LEN_BIP_GMAC_128) 488 return -EINVAL; 489 break; 490 case WLAN_CIPHER_SUITE_BIP_GMAC_256: 491 if (params->key_len != WLAN_KEY_LEN_BIP_GMAC_256) 492 return -EINVAL; 493 break; 494 default: 495 /* 496 * We don't know anything about this algorithm, 497 * allow using it -- but the driver must check 498 * all parameters! We still check below whether 499 * or not the driver supports this algorithm, 500 * of course. 501 */ 502 break; 503 } 504 505 if (params->seq) { 506 switch (params->cipher) { 507 case WLAN_CIPHER_SUITE_WEP40: 508 case WLAN_CIPHER_SUITE_WEP104: 509 /* These ciphers do not use key sequence */ 510 return -EINVAL; 511 case WLAN_CIPHER_SUITE_TKIP: 512 case WLAN_CIPHER_SUITE_CCMP: 513 case WLAN_CIPHER_SUITE_CCMP_256: 514 case WLAN_CIPHER_SUITE_GCMP: 515 case WLAN_CIPHER_SUITE_GCMP_256: 516 case WLAN_CIPHER_SUITE_AES_CMAC: 517 case WLAN_CIPHER_SUITE_BIP_CMAC_256: 518 case WLAN_CIPHER_SUITE_BIP_GMAC_128: 519 case WLAN_CIPHER_SUITE_BIP_GMAC_256: 520 if (params->seq_len != 6) 521 return -EINVAL; 522 break; 523 } 524 } 525 526 if (!cfg80211_supported_cipher_suite(&rdev->wiphy, params->cipher)) 527 return -EINVAL; 528 529 if (params->ltf_keyseed) { 530 if (!wiphy_ext_feature_isset(&rdev->wiphy, 531 NL80211_EXT_FEATURE_SECURE_LTF) || 532 !wiphy_ext_feature_isset(&rdev->wiphy, 533 NL80211_EXT_FEATURE_SET_KEY_LTF_SEED)) 534 return -EOPNOTSUPP; 535 536 /* 537 * LTF key seed is pairwise key material and must only be 538 * used with a pairwise key 539 */ 540 if (!pairwise) 541 return -EINVAL; 542 } 543 544 return 0; 545 } 546 547 unsigned int __attribute_const__ ieee80211_hdrlen(__le16 fc) 548 { 549 unsigned int hdrlen = 24; 550 551 if (ieee80211_is_ext(fc)) { 552 hdrlen = 4; 553 goto out; 554 } 555 556 if (ieee80211_is_data(fc)) { 557 if (ieee80211_has_a4(fc)) 558 hdrlen = 30; 559 if (ieee80211_is_data_qos(fc)) { 560 hdrlen += IEEE80211_QOS_CTL_LEN; 561 if (ieee80211_has_order(fc)) 562 hdrlen += IEEE80211_HT_CTL_LEN; 563 } 564 goto out; 565 } 566 567 if (ieee80211_is_mgmt(fc)) { 568 if (ieee80211_has_order(fc)) 569 hdrlen += IEEE80211_HT_CTL_LEN; 570 goto out; 571 } 572 573 if (ieee80211_is_ctl(fc)) { 574 /* 575 * ACK and CTS are 10 bytes, all others 16. To see how 576 * to get this condition consider 577 * subtype mask: 0b0000000011110000 (0x00F0) 578 * ACK subtype: 0b0000000011010000 (0x00D0) 579 * CTS subtype: 0b0000000011000000 (0x00C0) 580 * bits that matter: ^^^ (0x00E0) 581 * value of those: 0b0000000011000000 (0x00C0) 582 */ 583 if ((fc & cpu_to_le16(0x00E0)) == cpu_to_le16(0x00C0)) 584 hdrlen = 10; 585 else 586 hdrlen = 16; 587 } 588 out: 589 return hdrlen; 590 } 591 EXPORT_SYMBOL(ieee80211_hdrlen); 592 593 unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb) 594 { 595 const struct ieee80211_hdr *hdr = 596 (const struct ieee80211_hdr *)skb->data; 597 unsigned int hdrlen; 598 599 if (unlikely(skb->len < 10)) 600 return 0; 601 hdrlen = ieee80211_hdrlen(hdr->frame_control); 602 if (unlikely(hdrlen > skb->len)) 603 return 0; 604 return hdrlen; 605 } 606 EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb); 607 608 static unsigned int __ieee80211_get_mesh_hdrlen(u8 flags) 609 { 610 int ae = flags & MESH_FLAGS_AE; 611 /* 802.11-2012, 8.2.4.7.3 */ 612 switch (ae) { 613 default: 614 case 0: 615 return 6; 616 case MESH_FLAGS_AE_A4: 617 return 12; 618 case MESH_FLAGS_AE_A5_A6: 619 return 18; 620 } 621 } 622 623 unsigned int ieee80211_get_mesh_hdrlen(struct ieee80211s_hdr *meshhdr) 624 { 625 return __ieee80211_get_mesh_hdrlen(meshhdr->flags); 626 } 627 EXPORT_SYMBOL(ieee80211_get_mesh_hdrlen); 628 629 bool ieee80211_get_8023_tunnel_proto(const void *hdr, __be16 *proto) 630 { 631 const __be16 *hdr_proto = hdr + ETH_ALEN; 632 633 if (!(ether_addr_equal(hdr, rfc1042_header) && 634 *hdr_proto != htons(ETH_P_AARP) && 635 *hdr_proto != htons(ETH_P_IPX)) && 636 !ether_addr_equal(hdr, bridge_tunnel_header)) 637 return false; 638 639 *proto = *hdr_proto; 640 641 return true; 642 } 643 EXPORT_SYMBOL(ieee80211_get_8023_tunnel_proto); 644 645 int ieee80211_strip_8023_mesh_hdr(struct sk_buff *skb) 646 { 647 const void *mesh_addr; 648 struct { 649 struct ethhdr eth; 650 u8 flags; 651 } payload; 652 int hdrlen; 653 int ret; 654 655 ret = skb_copy_bits(skb, 0, &payload, sizeof(payload)); 656 if (ret) 657 return ret; 658 659 hdrlen = sizeof(payload.eth) + __ieee80211_get_mesh_hdrlen(payload.flags); 660 661 if (likely(pskb_may_pull(skb, hdrlen + 8) && 662 ieee80211_get_8023_tunnel_proto(skb->data + hdrlen, 663 &payload.eth.h_proto))) 664 hdrlen += ETH_ALEN + 2; 665 else if (!pskb_may_pull(skb, hdrlen)) 666 return -EINVAL; 667 else 668 payload.eth.h_proto = htons(skb->len - hdrlen); 669 670 mesh_addr = skb->data + sizeof(payload.eth) + ETH_ALEN; 671 switch (payload.flags & MESH_FLAGS_AE) { 672 case MESH_FLAGS_AE_A4: 673 memcpy(&payload.eth.h_source, mesh_addr, ETH_ALEN); 674 break; 675 case MESH_FLAGS_AE_A5_A6: 676 memcpy(&payload.eth, mesh_addr, 2 * ETH_ALEN); 677 break; 678 default: 679 break; 680 } 681 682 pskb_pull(skb, hdrlen - sizeof(payload.eth)); 683 memcpy(skb->data, &payload.eth, sizeof(payload.eth)); 684 685 return 0; 686 } 687 EXPORT_SYMBOL(ieee80211_strip_8023_mesh_hdr); 688 689 int ieee80211_data_to_8023_exthdr(struct sk_buff *skb, struct ethhdr *ehdr, 690 const u8 *addr, enum nl80211_iftype iftype, 691 u8 data_offset, bool is_amsdu) 692 { 693 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; 694 struct { 695 u8 hdr[ETH_ALEN] __aligned(2); 696 __be16 proto; 697 } payload; 698 struct ethhdr tmp; 699 u16 hdrlen; 700 701 if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) 702 return -1; 703 704 hdrlen = ieee80211_hdrlen(hdr->frame_control) + data_offset; 705 if (skb->len < hdrlen) 706 return -1; 707 708 /* convert IEEE 802.11 header + possible LLC headers into Ethernet 709 * header 710 * IEEE 802.11 address fields: 711 * ToDS FromDS Addr1 Addr2 Addr3 Addr4 712 * 0 0 DA SA BSSID n/a 713 * 0 1 DA BSSID SA n/a 714 * 1 0 BSSID SA DA n/a 715 * 1 1 RA TA DA SA 716 */ 717 memcpy(tmp.h_dest, ieee80211_get_DA(hdr), ETH_ALEN); 718 memcpy(tmp.h_source, ieee80211_get_SA(hdr), ETH_ALEN); 719 720 switch (hdr->frame_control & 721 cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) { 722 case cpu_to_le16(IEEE80211_FCTL_TODS): 723 if (unlikely(iftype != NL80211_IFTYPE_AP && 724 iftype != NL80211_IFTYPE_AP_VLAN && 725 iftype != NL80211_IFTYPE_P2P_GO)) 726 return -1; 727 break; 728 case cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS): 729 if (unlikely(iftype != NL80211_IFTYPE_MESH_POINT && 730 iftype != NL80211_IFTYPE_AP_VLAN && 731 iftype != NL80211_IFTYPE_STATION)) 732 return -1; 733 break; 734 case cpu_to_le16(IEEE80211_FCTL_FROMDS): 735 if ((iftype != NL80211_IFTYPE_STATION && 736 iftype != NL80211_IFTYPE_P2P_CLIENT && 737 iftype != NL80211_IFTYPE_MESH_POINT) || 738 (is_multicast_ether_addr(tmp.h_dest) && 739 ether_addr_equal(tmp.h_source, addr))) 740 return -1; 741 break; 742 case cpu_to_le16(0): 743 if (iftype != NL80211_IFTYPE_ADHOC && 744 iftype != NL80211_IFTYPE_STATION && 745 iftype != NL80211_IFTYPE_OCB && 746 iftype != NL80211_IFTYPE_NAN_DATA) 747 return -1; 748 break; 749 } 750 751 if (likely(!is_amsdu && iftype != NL80211_IFTYPE_MESH_POINT && 752 skb_copy_bits(skb, hdrlen, &payload, sizeof(payload)) == 0 && 753 ieee80211_get_8023_tunnel_proto(&payload, &tmp.h_proto))) { 754 /* remove RFC1042 or Bridge-Tunnel encapsulation */ 755 hdrlen += ETH_ALEN + 2; 756 skb_postpull_rcsum(skb, &payload, ETH_ALEN + 2); 757 } else { 758 tmp.h_proto = htons(skb->len - hdrlen); 759 } 760 761 pskb_pull(skb, hdrlen); 762 763 if (!ehdr) 764 ehdr = skb_push(skb, sizeof(struct ethhdr)); 765 memcpy(ehdr, &tmp, sizeof(tmp)); 766 767 return 0; 768 } 769 EXPORT_SYMBOL(ieee80211_data_to_8023_exthdr); 770 771 static void 772 __frame_add_frag(struct sk_buff *skb, struct page *page, 773 void *ptr, int len, int size) 774 { 775 struct skb_shared_info *sh = skb_shinfo(skb); 776 int page_offset; 777 778 get_page(page); 779 page_offset = ptr - page_address(page); 780 skb_add_rx_frag(skb, sh->nr_frags, page, page_offset, len, size); 781 } 782 783 static void 784 __ieee80211_amsdu_copy_frag(struct sk_buff *skb, struct sk_buff *frame, 785 int offset, int len) 786 { 787 struct skb_shared_info *sh = skb_shinfo(skb); 788 const skb_frag_t *frag = &sh->frags[0]; 789 struct page *frag_page; 790 void *frag_ptr; 791 int frag_len, frag_size; 792 int head_size = skb->len - skb->data_len; 793 int cur_len; 794 795 frag_page = virt_to_head_page(skb->head); 796 frag_ptr = skb->data; 797 frag_size = head_size; 798 799 while (offset >= frag_size) { 800 offset -= frag_size; 801 frag_page = skb_frag_page(frag); 802 frag_ptr = skb_frag_address(frag); 803 frag_size = skb_frag_size(frag); 804 frag++; 805 } 806 807 frag_ptr += offset; 808 frag_len = frag_size - offset; 809 810 cur_len = min(len, frag_len); 811 812 __frame_add_frag(frame, frag_page, frag_ptr, cur_len, frag_size); 813 len -= cur_len; 814 815 while (len > 0) { 816 frag_len = skb_frag_size(frag); 817 cur_len = min(len, frag_len); 818 __frame_add_frag(frame, skb_frag_page(frag), 819 skb_frag_address(frag), cur_len, frag_len); 820 len -= cur_len; 821 frag++; 822 } 823 } 824 825 static struct sk_buff * 826 __ieee80211_amsdu_copy(struct sk_buff *skb, unsigned int hlen, 827 int offset, int len, bool reuse_frag, 828 int min_len) 829 { 830 struct sk_buff *frame; 831 int cur_len = len; 832 833 if (skb->len - offset < len) 834 return NULL; 835 836 /* 837 * When reusing fragments, copy some data to the head to simplify 838 * ethernet header handling and speed up protocol header processing 839 * in the stack later. 840 */ 841 if (reuse_frag) 842 cur_len = min_t(int, len, min_len); 843 844 /* 845 * Allocate and reserve two bytes more for payload 846 * alignment since sizeof(struct ethhdr) is 14. 847 */ 848 frame = dev_alloc_skb(hlen + sizeof(struct ethhdr) + 2 + cur_len); 849 if (!frame) 850 return NULL; 851 852 frame->priority = skb->priority; 853 skb_reserve(frame, hlen + sizeof(struct ethhdr) + 2); 854 skb_copy_bits(skb, offset, skb_put(frame, cur_len), cur_len); 855 856 len -= cur_len; 857 if (!len) 858 return frame; 859 860 offset += cur_len; 861 __ieee80211_amsdu_copy_frag(skb, frame, offset, len); 862 863 return frame; 864 } 865 866 static u16 867 ieee80211_amsdu_subframe_length(void *field, u8 mesh_flags, u8 hdr_type) 868 { 869 __le16 *field_le = field; 870 __be16 *field_be = field; 871 u16 len; 872 873 if (hdr_type >= 2) 874 len = le16_to_cpu(*field_le); 875 else 876 len = be16_to_cpu(*field_be); 877 if (hdr_type) 878 len += __ieee80211_get_mesh_hdrlen(mesh_flags); 879 880 return len; 881 } 882 883 bool ieee80211_is_valid_amsdu(struct sk_buff *skb, u8 mesh_hdr) 884 { 885 int offset = 0, subframe_len, padding; 886 887 for (offset = 0; offset < skb->len; offset += subframe_len + padding) { 888 int remaining = skb->len - offset; 889 struct { 890 __be16 len; 891 u8 mesh_flags; 892 } hdr; 893 u16 len; 894 895 if (sizeof(hdr) > remaining) 896 return false; 897 898 if (skb_copy_bits(skb, offset + 2 * ETH_ALEN, &hdr, sizeof(hdr)) < 0) 899 return false; 900 901 len = ieee80211_amsdu_subframe_length(&hdr.len, hdr.mesh_flags, 902 mesh_hdr); 903 subframe_len = sizeof(struct ethhdr) + len; 904 padding = (4 - subframe_len) & 0x3; 905 906 if (subframe_len > remaining) 907 return false; 908 } 909 910 return true; 911 } 912 EXPORT_SYMBOL(ieee80211_is_valid_amsdu); 913 914 915 /* 916 * Detects if an MSDU frame was maliciously converted into an A-MSDU 917 * frame by an adversary. This is done by parsing the received frame 918 * as if it were a regular MSDU, even though the A-MSDU flag is set. 919 * 920 * For non-mesh interfaces, detection involves checking whether the 921 * payload, when interpreted as an MSDU, begins with a valid RFC1042 922 * header. This is done by comparing the A-MSDU subheader's destination 923 * address to the start of the RFC1042 header. 924 * 925 * For mesh interfaces, the MSDU includes a 6-byte Mesh Control field 926 * and an optional variable-length Mesh Address Extension field before 927 * the RFC1042 header. The position of the RFC1042 header must therefore 928 * be calculated based on the mesh header length. 929 * 930 * Since this function intentionally parses an A-MSDU frame as an MSDU, 931 * it only assumes that the A-MSDU subframe header is present, and 932 * beyond this it performs its own bounds checks under the assumption 933 * that the frame is instead parsed as a non-aggregated MSDU. 934 */ 935 static bool 936 is_amsdu_aggregation_attack(struct ethhdr *eth, struct sk_buff *skb, 937 enum nl80211_iftype iftype) 938 { 939 int offset; 940 941 /* Non-mesh case can be directly compared */ 942 if (iftype != NL80211_IFTYPE_MESH_POINT) 943 return ether_addr_equal(eth->h_dest, rfc1042_header); 944 945 offset = __ieee80211_get_mesh_hdrlen(eth->h_dest[0]); 946 if (offset == 6) { 947 /* Mesh case with empty address extension field */ 948 return ether_addr_equal(eth->h_source, rfc1042_header); 949 } else if (offset + ETH_ALEN <= skb->len) { 950 /* Mesh case with non-empty address extension field */ 951 u8 temp[ETH_ALEN]; 952 953 skb_copy_bits(skb, offset, temp, ETH_ALEN); 954 return ether_addr_equal(temp, rfc1042_header); 955 } 956 957 return false; 958 } 959 960 void ieee80211_amsdu_to_8023s(struct sk_buff *skb, struct sk_buff_head *list, 961 const u8 *addr, enum nl80211_iftype iftype, 962 const unsigned int extra_headroom, 963 const u8 *check_da, const u8 *check_sa, 964 u8 mesh_control) 965 { 966 unsigned int hlen = ALIGN(extra_headroom, 4); 967 struct sk_buff *frame = NULL; 968 int offset = 0; 969 struct { 970 struct ethhdr eth; 971 uint8_t flags; 972 } hdr; 973 bool reuse_frag = skb->head_frag && !skb_has_frag_list(skb); 974 bool reuse_skb = false; 975 bool last = false; 976 int copy_len = sizeof(hdr.eth); 977 978 if (iftype == NL80211_IFTYPE_MESH_POINT) 979 copy_len = sizeof(hdr); 980 981 while (!last) { 982 int remaining = skb->len - offset; 983 unsigned int subframe_len; 984 int len, mesh_len = 0; 985 u8 padding; 986 987 if (copy_len > remaining) 988 goto purge; 989 990 skb_copy_bits(skb, offset, &hdr, copy_len); 991 if (iftype == NL80211_IFTYPE_MESH_POINT) 992 mesh_len = __ieee80211_get_mesh_hdrlen(hdr.flags); 993 len = ieee80211_amsdu_subframe_length(&hdr.eth.h_proto, hdr.flags, 994 mesh_control); 995 subframe_len = sizeof(struct ethhdr) + len; 996 padding = (4 - subframe_len) & 0x3; 997 998 /* the last MSDU has no padding */ 999 if (subframe_len > remaining) 1000 goto purge; 1001 /* mitigate A-MSDU aggregation injection attacks, to be 1002 * checked when processing first subframe (offset == 0). 1003 */ 1004 if (offset == 0 && is_amsdu_aggregation_attack(&hdr.eth, skb, iftype)) 1005 goto purge; 1006 1007 offset += sizeof(struct ethhdr); 1008 last = remaining <= subframe_len + padding; 1009 1010 /* FIXME: should we really accept multicast DA? */ 1011 if ((check_da && !is_multicast_ether_addr(hdr.eth.h_dest) && 1012 !ether_addr_equal(check_da, hdr.eth.h_dest)) || 1013 (check_sa && !ether_addr_equal(check_sa, hdr.eth.h_source))) { 1014 offset += len + padding; 1015 continue; 1016 } 1017 1018 /* reuse skb for the last subframe */ 1019 if (!skb_is_nonlinear(skb) && !reuse_frag && last) { 1020 skb_pull(skb, offset); 1021 frame = skb; 1022 reuse_skb = true; 1023 } else { 1024 frame = __ieee80211_amsdu_copy(skb, hlen, offset, len, 1025 reuse_frag, 32 + mesh_len); 1026 if (!frame) 1027 goto purge; 1028 1029 offset += len + padding; 1030 } 1031 1032 skb_reset_network_header(frame); 1033 frame->dev = skb->dev; 1034 frame->priority = skb->priority; 1035 1036 if (likely(iftype != NL80211_IFTYPE_MESH_POINT && 1037 ieee80211_get_8023_tunnel_proto(frame->data, &hdr.eth.h_proto))) 1038 skb_pull(frame, ETH_ALEN + 2); 1039 1040 memcpy(skb_push(frame, sizeof(hdr.eth)), &hdr.eth, sizeof(hdr.eth)); 1041 __skb_queue_tail(list, frame); 1042 } 1043 1044 if (!reuse_skb) 1045 dev_kfree_skb(skb); 1046 1047 return; 1048 1049 purge: 1050 __skb_queue_purge(list); 1051 dev_kfree_skb(skb); 1052 } 1053 EXPORT_SYMBOL(ieee80211_amsdu_to_8023s); 1054 1055 /* Given a data frame determine the 802.1p/1d tag to use. */ 1056 unsigned int cfg80211_classify8021d(struct sk_buff *skb, 1057 struct cfg80211_qos_map *qos_map) 1058 { 1059 unsigned int dscp; 1060 unsigned char vlan_priority; 1061 unsigned int ret; 1062 1063 /* skb->priority values from 256->263 are magic values to 1064 * directly indicate a specific 802.1d priority. This is used 1065 * to allow 802.1d priority to be passed directly in from VLAN 1066 * tags, etc. 1067 */ 1068 if (skb->priority >= 256 && skb->priority <= 263) { 1069 ret = skb->priority - 256; 1070 goto out; 1071 } 1072 1073 if (skb_vlan_tag_present(skb)) { 1074 vlan_priority = (skb_vlan_tag_get(skb) & VLAN_PRIO_MASK) 1075 >> VLAN_PRIO_SHIFT; 1076 if (vlan_priority > 0) { 1077 ret = vlan_priority; 1078 goto out; 1079 } 1080 } 1081 1082 switch (skb->protocol) { 1083 case htons(ETH_P_IP): { 1084 const struct iphdr *iph; 1085 struct iphdr _iph; 1086 1087 iph = skb_header_pointer(skb, sizeof(struct ethhdr), 1088 sizeof(*iph), &_iph); 1089 if (!iph) 1090 return 0; 1091 1092 dscp = ipv4_get_dsfield(iph) & 0xfc; 1093 break; 1094 } 1095 case htons(ETH_P_IPV6): { 1096 const struct ipv6hdr *ip6h; 1097 struct ipv6hdr _ip6h; 1098 1099 ip6h = skb_header_pointer(skb, sizeof(struct ethhdr), 1100 sizeof(*ip6h), &_ip6h); 1101 if (!ip6h) 1102 return 0; 1103 1104 dscp = ipv6_get_dsfield(ip6h) & 0xfc; 1105 break; 1106 } 1107 case htons(ETH_P_MPLS_UC): 1108 case htons(ETH_P_MPLS_MC): { 1109 struct mpls_label mpls_tmp, *mpls; 1110 1111 mpls = skb_header_pointer(skb, sizeof(struct ethhdr), 1112 sizeof(*mpls), &mpls_tmp); 1113 if (!mpls) 1114 return 0; 1115 1116 ret = (ntohl(mpls->entry) & MPLS_LS_TC_MASK) 1117 >> MPLS_LS_TC_SHIFT; 1118 goto out; 1119 } 1120 case htons(ETH_P_80221): 1121 /* 802.21 is always network control traffic */ 1122 return 7; 1123 default: 1124 return 0; 1125 } 1126 1127 if (qos_map) { 1128 unsigned int i, tmp_dscp = dscp >> 2; 1129 1130 for (i = 0; i < qos_map->num_des; i++) { 1131 if (tmp_dscp == qos_map->dscp_exception[i].dscp) { 1132 ret = qos_map->dscp_exception[i].up; 1133 goto out; 1134 } 1135 } 1136 1137 for (i = 0; i < 8; i++) { 1138 if (tmp_dscp >= qos_map->up[i].low && 1139 tmp_dscp <= qos_map->up[i].high) { 1140 ret = i; 1141 goto out; 1142 } 1143 } 1144 } 1145 1146 /* The default mapping as defined Section 2.3 in RFC8325: The three 1147 * Most Significant Bits (MSBs) of the DSCP are used as the 1148 * corresponding L2 markings. 1149 */ 1150 ret = dscp >> 5; 1151 1152 /* Handle specific DSCP values for which the default mapping (as 1153 * described above) doesn't adhere to the intended usage of the DSCP 1154 * value. See section 4 in RFC8325. Specifically, for the following 1155 * Diffserv Service Classes no update is needed: 1156 * - Standard: DF 1157 * - Low Priority Data: CS1 1158 * - Multimedia Conferencing: AF41, AF42, AF43 1159 * - Network Control Traffic: CS7 1160 * - Real-Time Interactive: CS4 1161 * - Signaling: CS5 1162 */ 1163 switch (dscp >> 2) { 1164 case 10: 1165 case 12: 1166 case 14: 1167 /* High throughput data: AF11, AF12, AF13 */ 1168 ret = 0; 1169 break; 1170 case 16: 1171 /* Operations, Administration, and Maintenance and Provisioning: 1172 * CS2 1173 */ 1174 ret = 0; 1175 break; 1176 case 18: 1177 case 20: 1178 case 22: 1179 /* Low latency data: AF21, AF22, AF23 */ 1180 ret = 3; 1181 break; 1182 case 24: 1183 /* Broadcasting video: CS3 */ 1184 ret = 4; 1185 break; 1186 case 26: 1187 case 28: 1188 case 30: 1189 /* Multimedia Streaming: AF31, AF32, AF33 */ 1190 ret = 4; 1191 break; 1192 case 44: 1193 /* Voice Admit: VA */ 1194 ret = 6; 1195 break; 1196 case 46: 1197 /* Telephony traffic: EF */ 1198 ret = 6; 1199 break; 1200 case 48: 1201 /* Network Control Traffic: CS6 */ 1202 ret = 7; 1203 break; 1204 } 1205 out: 1206 return array_index_nospec(ret, IEEE80211_NUM_TIDS); 1207 } 1208 EXPORT_SYMBOL(cfg80211_classify8021d); 1209 1210 const struct element *ieee80211_bss_get_elem(struct cfg80211_bss *bss, u8 id) 1211 { 1212 const struct cfg80211_bss_ies *ies; 1213 1214 ies = rcu_dereference(bss->ies); 1215 if (!ies) 1216 return NULL; 1217 1218 return cfg80211_find_elem(id, ies->data, ies->len); 1219 } 1220 EXPORT_SYMBOL(ieee80211_bss_get_elem); 1221 1222 void cfg80211_upload_connect_keys(struct wireless_dev *wdev) 1223 { 1224 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1225 struct net_device *dev = wdev->netdev; 1226 int i; 1227 1228 if (!wdev->connect_keys) 1229 return; 1230 1231 for (i = 0; i < 4; i++) { 1232 if (!wdev->connect_keys->params[i].cipher) 1233 continue; 1234 if (rdev_add_key(rdev, wdev, -1, i, NL80211_KEYTYPE_GROUP, NULL, 1235 &wdev->connect_keys->params[i])) { 1236 netdev_err(dev, "failed to set key %d\n", i); 1237 continue; 1238 } 1239 if (wdev->connect_keys->def == i && 1240 rdev_set_default_key(rdev, dev, -1, i, true, true)) { 1241 netdev_err(dev, "failed to set defkey %d\n", i); 1242 continue; 1243 } 1244 } 1245 1246 kfree_sensitive(wdev->connect_keys); 1247 wdev->connect_keys = NULL; 1248 } 1249 1250 void cfg80211_process_wdev_events(struct wireless_dev *wdev) 1251 { 1252 struct cfg80211_event *ev; 1253 unsigned long flags; 1254 1255 spin_lock_irqsave(&wdev->event_lock, flags); 1256 while (!list_empty(&wdev->event_list)) { 1257 ev = list_first_entry(&wdev->event_list, 1258 struct cfg80211_event, list); 1259 list_del(&ev->list); 1260 spin_unlock_irqrestore(&wdev->event_lock, flags); 1261 1262 switch (ev->type) { 1263 case EVENT_CONNECT_RESULT: 1264 __cfg80211_connect_result( 1265 wdev->netdev, 1266 &ev->cr, 1267 ev->cr.status == WLAN_STATUS_SUCCESS); 1268 break; 1269 case EVENT_ROAMED: 1270 __cfg80211_roamed(wdev, &ev->rm); 1271 break; 1272 case EVENT_DISCONNECTED: 1273 __cfg80211_disconnected(wdev->netdev, 1274 ev->dc.ie, ev->dc.ie_len, 1275 ev->dc.reason, 1276 !ev->dc.locally_generated); 1277 break; 1278 case EVENT_IBSS_JOINED: 1279 __cfg80211_ibss_joined(wdev->netdev, ev->ij.bss); 1280 break; 1281 case EVENT_STOPPED: 1282 /* 1283 * for NAN interfaces cfg80211_leave must be called but 1284 * locking here doesn't allow this. 1285 */ 1286 if (WARN_ON(wdev->iftype == NL80211_IFTYPE_NAN)) 1287 break; 1288 1289 cfg80211_leave_locked(wiphy_to_rdev(wdev->wiphy), wdev, 1290 ev->link_id); 1291 break; 1292 case EVENT_PORT_AUTHORIZED: 1293 __cfg80211_port_authorized(wdev, ev->pa.peer_addr, 1294 ev->pa.td_bitmap, 1295 ev->pa.td_bitmap_len); 1296 break; 1297 } 1298 1299 kfree(ev); 1300 1301 spin_lock_irqsave(&wdev->event_lock, flags); 1302 } 1303 spin_unlock_irqrestore(&wdev->event_lock, flags); 1304 } 1305 1306 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev) 1307 { 1308 struct wireless_dev *wdev; 1309 1310 lockdep_assert_held(&rdev->wiphy.mtx); 1311 1312 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) 1313 cfg80211_process_wdev_events(wdev); 1314 } 1315 1316 int cfg80211_change_iface(struct cfg80211_registered_device *rdev, 1317 struct net_device *dev, enum nl80211_iftype ntype, 1318 struct vif_params *params) 1319 { 1320 int err; 1321 enum nl80211_iftype otype = dev->ieee80211_ptr->iftype; 1322 1323 lockdep_assert_held(&rdev->wiphy.mtx); 1324 1325 /* don't support changing VLANs, you just re-create them */ 1326 if (otype == NL80211_IFTYPE_AP_VLAN) 1327 return -EOPNOTSUPP; 1328 1329 /* 1330 * for NAN interfaces cfg80211_leave must be called for leaving, 1331 * but locking here doesn't allow this. 1332 */ 1333 if (otype == NL80211_IFTYPE_NAN) 1334 return -EOPNOTSUPP; 1335 1336 /* cannot change into P2P device or NAN */ 1337 if (ntype == NL80211_IFTYPE_P2P_DEVICE || 1338 ntype == NL80211_IFTYPE_NAN || 1339 ntype == NL80211_IFTYPE_PD) 1340 return -EOPNOTSUPP; 1341 1342 if (!rdev->ops->change_virtual_intf || 1343 !(rdev->wiphy.interface_modes & (1 << ntype))) 1344 return -EOPNOTSUPP; 1345 1346 if (ntype != otype) { 1347 /* if it's part of a bridge, reject changing type to station/ibss */ 1348 if (netif_is_bridge_port(dev) && 1349 (ntype == NL80211_IFTYPE_ADHOC || 1350 ntype == NL80211_IFTYPE_STATION || 1351 ntype == NL80211_IFTYPE_P2P_CLIENT)) 1352 return -EBUSY; 1353 1354 dev->ieee80211_ptr->use_4addr = false; 1355 rdev_set_qos_map(rdev, dev, NULL); 1356 1357 cfg80211_leave_locked(rdev, dev->ieee80211_ptr, -1); 1358 1359 cfg80211_process_rdev_events(rdev); 1360 cfg80211_mlme_purge_registrations(dev->ieee80211_ptr); 1361 1362 memset(&dev->ieee80211_ptr->u, 0, 1363 sizeof(dev->ieee80211_ptr->u)); 1364 memset(&dev->ieee80211_ptr->links, 0, 1365 sizeof(dev->ieee80211_ptr->links)); 1366 } 1367 1368 err = rdev_change_virtual_intf(rdev, dev, ntype, params); 1369 1370 WARN_ON(!err && dev->ieee80211_ptr->iftype != ntype); 1371 1372 if (!err && params && params->use_4addr != -1) 1373 dev->ieee80211_ptr->use_4addr = params->use_4addr; 1374 1375 if (!err) { 1376 dev->priv_flags &= ~IFF_DONT_BRIDGE; 1377 switch (ntype) { 1378 case NL80211_IFTYPE_STATION: 1379 if (dev->ieee80211_ptr->use_4addr) 1380 break; 1381 fallthrough; 1382 case NL80211_IFTYPE_OCB: 1383 case NL80211_IFTYPE_P2P_CLIENT: 1384 case NL80211_IFTYPE_ADHOC: 1385 case NL80211_IFTYPE_NAN_DATA: 1386 dev->priv_flags |= IFF_DONT_BRIDGE; 1387 break; 1388 case NL80211_IFTYPE_P2P_GO: 1389 case NL80211_IFTYPE_AP: 1390 case NL80211_IFTYPE_AP_VLAN: 1391 case NL80211_IFTYPE_MESH_POINT: 1392 /* bridging OK */ 1393 break; 1394 case NL80211_IFTYPE_MONITOR: 1395 /* monitor can't bridge anyway */ 1396 break; 1397 case NL80211_IFTYPE_UNSPECIFIED: 1398 case NUM_NL80211_IFTYPES: 1399 /* not happening */ 1400 break; 1401 case NL80211_IFTYPE_P2P_DEVICE: 1402 case NL80211_IFTYPE_WDS: 1403 case NL80211_IFTYPE_NAN: 1404 case NL80211_IFTYPE_PD: 1405 WARN_ON(1); 1406 break; 1407 } 1408 } 1409 1410 if (!err && ntype != otype && netif_running(dev)) { 1411 cfg80211_update_iface_num(rdev, ntype, 1); 1412 cfg80211_update_iface_num(rdev, otype, -1); 1413 } 1414 1415 return err; 1416 } 1417 1418 static u32 cfg80211_calculate_bitrate_ht(struct rate_info *rate) 1419 { 1420 int modulation, streams, bitrate; 1421 1422 /* the formula below does only work for MCS values smaller than 32 */ 1423 if (WARN_ON_ONCE(rate->mcs >= 32)) 1424 return 0; 1425 1426 modulation = rate->mcs & 7; 1427 streams = (rate->mcs >> 3) + 1; 1428 1429 bitrate = (rate->bw == RATE_INFO_BW_40) ? 13500000 : 6500000; 1430 1431 if (modulation < 4) 1432 bitrate *= (modulation + 1); 1433 else if (modulation == 4) 1434 bitrate *= (modulation + 2); 1435 else 1436 bitrate *= (modulation + 3); 1437 1438 bitrate *= streams; 1439 1440 if (rate->flags & RATE_INFO_FLAGS_SHORT_GI) 1441 bitrate = (bitrate / 9) * 10; 1442 1443 /* do NOT round down here */ 1444 return (bitrate + 50000) / 100000; 1445 } 1446 1447 static u32 cfg80211_calculate_bitrate_dmg(struct rate_info *rate) 1448 { 1449 static const u32 __mcs2bitrate[] = { 1450 /* control PHY */ 1451 [0] = 275, 1452 /* SC PHY */ 1453 [1] = 3850, 1454 [2] = 7700, 1455 [3] = 9625, 1456 [4] = 11550, 1457 [5] = 12512, /* 1251.25 mbps */ 1458 [6] = 15400, 1459 [7] = 19250, 1460 [8] = 23100, 1461 [9] = 25025, 1462 [10] = 30800, 1463 [11] = 38500, 1464 [12] = 46200, 1465 /* OFDM PHY */ 1466 [13] = 6930, 1467 [14] = 8662, /* 866.25 mbps */ 1468 [15] = 13860, 1469 [16] = 17325, 1470 [17] = 20790, 1471 [18] = 27720, 1472 [19] = 34650, 1473 [20] = 41580, 1474 [21] = 45045, 1475 [22] = 51975, 1476 [23] = 62370, 1477 [24] = 67568, /* 6756.75 mbps */ 1478 /* LP-SC PHY */ 1479 [25] = 6260, 1480 [26] = 8340, 1481 [27] = 11120, 1482 [28] = 12510, 1483 [29] = 16680, 1484 [30] = 22240, 1485 [31] = 25030, 1486 }; 1487 1488 if (WARN_ON_ONCE(rate->mcs >= ARRAY_SIZE(__mcs2bitrate))) 1489 return 0; 1490 1491 return __mcs2bitrate[rate->mcs]; 1492 } 1493 1494 static u32 cfg80211_calculate_bitrate_extended_sc_dmg(struct rate_info *rate) 1495 { 1496 static const u32 __mcs2bitrate[] = { 1497 [6 - 6] = 26950, /* MCS 9.1 : 2695.0 mbps */ 1498 [7 - 6] = 50050, /* MCS 12.1 */ 1499 [8 - 6] = 53900, 1500 [9 - 6] = 57750, 1501 [10 - 6] = 63900, 1502 [11 - 6] = 75075, 1503 [12 - 6] = 80850, 1504 }; 1505 1506 /* Extended SC MCS not defined for base MCS below 6 or above 12 */ 1507 if (WARN_ON_ONCE(rate->mcs < 6 || rate->mcs > 12)) 1508 return 0; 1509 1510 return __mcs2bitrate[rate->mcs - 6]; 1511 } 1512 1513 static u32 cfg80211_calculate_bitrate_edmg(struct rate_info *rate) 1514 { 1515 static const u32 __mcs2bitrate[] = { 1516 /* control PHY */ 1517 [0] = 275, 1518 /* SC PHY */ 1519 [1] = 3850, 1520 [2] = 7700, 1521 [3] = 9625, 1522 [4] = 11550, 1523 [5] = 12512, /* 1251.25 mbps */ 1524 [6] = 13475, 1525 [7] = 15400, 1526 [8] = 19250, 1527 [9] = 23100, 1528 [10] = 25025, 1529 [11] = 26950, 1530 [12] = 30800, 1531 [13] = 38500, 1532 [14] = 46200, 1533 [15] = 50050, 1534 [16] = 53900, 1535 [17] = 57750, 1536 [18] = 69300, 1537 [19] = 75075, 1538 [20] = 80850, 1539 }; 1540 1541 if (WARN_ON_ONCE(rate->mcs >= ARRAY_SIZE(__mcs2bitrate))) 1542 return 0; 1543 1544 return __mcs2bitrate[rate->mcs] * rate->n_bonded_ch; 1545 } 1546 1547 static u32 cfg80211_calculate_bitrate_vht(struct rate_info *rate) 1548 { 1549 static const u32 base[4][12] = { 1550 { 6500000, 1551 13000000, 1552 19500000, 1553 26000000, 1554 39000000, 1555 52000000, 1556 58500000, 1557 65000000, 1558 78000000, 1559 /* not in the spec, but some devices use this: */ 1560 86700000, 1561 97500000, 1562 108300000, 1563 }, 1564 { 13500000, 1565 27000000, 1566 40500000, 1567 54000000, 1568 81000000, 1569 108000000, 1570 121500000, 1571 135000000, 1572 162000000, 1573 180000000, 1574 202500000, 1575 225000000, 1576 }, 1577 { 29300000, 1578 58500000, 1579 87800000, 1580 117000000, 1581 175500000, 1582 234000000, 1583 263300000, 1584 292500000, 1585 351000000, 1586 390000000, 1587 438800000, 1588 487500000, 1589 }, 1590 { 58500000, 1591 117000000, 1592 175500000, 1593 234000000, 1594 351000000, 1595 468000000, 1596 526500000, 1597 585000000, 1598 702000000, 1599 780000000, 1600 877500000, 1601 975000000, 1602 }, 1603 }; 1604 u32 bitrate; 1605 int idx; 1606 1607 if (rate->mcs > 11) 1608 goto warn; 1609 1610 switch (rate->bw) { 1611 case RATE_INFO_BW_160: 1612 idx = 3; 1613 break; 1614 case RATE_INFO_BW_80: 1615 idx = 2; 1616 break; 1617 case RATE_INFO_BW_40: 1618 idx = 1; 1619 break; 1620 case RATE_INFO_BW_5: 1621 case RATE_INFO_BW_10: 1622 default: 1623 goto warn; 1624 case RATE_INFO_BW_20: 1625 idx = 0; 1626 } 1627 1628 bitrate = base[idx][rate->mcs]; 1629 bitrate *= rate->nss; 1630 1631 if (rate->flags & RATE_INFO_FLAGS_SHORT_GI) 1632 bitrate = (bitrate / 9) * 10; 1633 1634 /* do NOT round down here */ 1635 return (bitrate + 50000) / 100000; 1636 warn: 1637 WARN_ONCE(1, "invalid rate bw=%d, mcs=%d, nss=%d\n", 1638 rate->bw, rate->mcs, rate->nss); 1639 return 0; 1640 } 1641 1642 static u32 cfg80211_calculate_bitrate_he(struct rate_info *rate) 1643 { 1644 #define SCALE 6144 1645 u32 mcs_divisors[14] = { 1646 102399, /* 16.666666... */ 1647 51201, /* 8.333333... */ 1648 34134, /* 5.555555... */ 1649 25599, /* 4.166666... */ 1650 17067, /* 2.777777... */ 1651 12801, /* 2.083333... */ 1652 11377, /* 1.851725... */ 1653 10239, /* 1.666666... */ 1654 8532, /* 1.388888... */ 1655 7680, /* 1.250000... */ 1656 6828, /* 1.111111... */ 1657 6144, /* 1.000000... */ 1658 5690, /* 0.926106... */ 1659 5120, /* 0.833333... */ 1660 }; 1661 u32 rates_160M[3] = { 960777777, 907400000, 816666666 }; 1662 u32 rates_996[3] = { 480388888, 453700000, 408333333 }; 1663 u32 rates_484[3] = { 229411111, 216666666, 195000000 }; 1664 u32 rates_242[3] = { 114711111, 108333333, 97500000 }; 1665 u32 rates_106[3] = { 40000000, 37777777, 34000000 }; 1666 u32 rates_52[3] = { 18820000, 17777777, 16000000 }; 1667 u32 rates_26[3] = { 9411111, 8888888, 8000000 }; 1668 u64 tmp; 1669 u32 result; 1670 1671 if (WARN_ON_ONCE(rate->mcs > 13)) 1672 return 0; 1673 1674 if (WARN_ON_ONCE(rate->he_gi > NL80211_RATE_INFO_HE_GI_3_2)) 1675 return 0; 1676 if (WARN_ON_ONCE(rate->he_ru_alloc > 1677 NL80211_RATE_INFO_HE_RU_ALLOC_2x996)) 1678 return 0; 1679 if (WARN_ON_ONCE(rate->nss < 1 || rate->nss > 8)) 1680 return 0; 1681 1682 if (rate->bw == RATE_INFO_BW_160 || 1683 (rate->bw == RATE_INFO_BW_HE_RU && 1684 rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_2x996)) 1685 result = rates_160M[rate->he_gi]; 1686 else if (rate->bw == RATE_INFO_BW_80 || 1687 (rate->bw == RATE_INFO_BW_HE_RU && 1688 rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_996)) 1689 result = rates_996[rate->he_gi]; 1690 else if (rate->bw == RATE_INFO_BW_40 || 1691 (rate->bw == RATE_INFO_BW_HE_RU && 1692 rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_484)) 1693 result = rates_484[rate->he_gi]; 1694 else if (rate->bw == RATE_INFO_BW_20 || 1695 (rate->bw == RATE_INFO_BW_HE_RU && 1696 rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_242)) 1697 result = rates_242[rate->he_gi]; 1698 else if (rate->bw == RATE_INFO_BW_HE_RU && 1699 rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_106) 1700 result = rates_106[rate->he_gi]; 1701 else if (rate->bw == RATE_INFO_BW_HE_RU && 1702 rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_52) 1703 result = rates_52[rate->he_gi]; 1704 else if (rate->bw == RATE_INFO_BW_HE_RU && 1705 rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_26) 1706 result = rates_26[rate->he_gi]; 1707 else { 1708 WARN(1, "invalid HE MCS: bw:%d, ru:%d\n", 1709 rate->bw, rate->he_ru_alloc); 1710 return 0; 1711 } 1712 1713 /* now scale to the appropriate MCS */ 1714 tmp = result; 1715 tmp *= SCALE; 1716 do_div(tmp, mcs_divisors[rate->mcs]); 1717 1718 /* and take NSS, DCM into account */ 1719 tmp *= rate->nss; 1720 do_div(tmp, 8); 1721 if (rate->he_dcm) 1722 do_div(tmp, 2); 1723 1724 result = tmp; 1725 1726 return result / 10000; 1727 } 1728 1729 static u32 _cfg80211_calculate_bitrate_eht_uhr(struct rate_info *rate) 1730 { 1731 #define SCALE 6144 1732 static const u32 mcs_divisors[] = { 1733 [ 0] = 102399, /* 16.666666... */ 1734 [ 1] = 51201, /* 8.333333... */ 1735 [ 2] = 34134, /* 5.555555... */ 1736 [ 3] = 25599, /* 4.166666... */ 1737 [ 4] = 17067, /* 2.777777... */ 1738 [ 5] = 12801, /* 2.083333... */ 1739 [ 6] = 11377, /* 1.851725... */ 1740 [ 7] = 10239, /* 1.666666... */ 1741 [ 8] = 8532, /* 1.388888... */ 1742 [ 9] = 7680, /* 1.250000... */ 1743 [10] = 6828, /* 1.111111... */ 1744 [11] = 6144, /* 1.000000... */ 1745 [12] = 5690, /* 0.926106... */ 1746 [13] = 5120, /* 0.833333... */ 1747 [14] = 409600, /* 66.666666... */ 1748 [15] = 204800, /* 33.333333... */ 1749 [17] = 38400, /* 6.250180... */ 1750 [19] = 19200, /* 3.125090... */ 1751 [20] = 15360, /* 2.500000... */ 1752 [23] = 9600, /* 1.562545... */ 1753 }; 1754 static const u32 rates_996[3] = { 480388888, 453700000, 408333333 }; 1755 static const u32 rates_484[3] = { 229411111, 216666666, 195000000 }; 1756 static const u32 rates_242[3] = { 114711111, 108333333, 97500000 }; 1757 static const u32 rates_106[3] = { 40000000, 37777777, 34000000 }; 1758 static const u32 rates_52[3] = { 18820000, 17777777, 16000000 }; 1759 static const u32 rates_26[3] = { 9411111, 8888888, 8000000 }; 1760 u64 tmp; 1761 u32 result; 1762 1763 if (WARN_ON_ONCE(rate->eht_gi > NL80211_RATE_INFO_EHT_GI_3_2)) 1764 return 0; 1765 if (WARN_ON_ONCE(rate->eht_ru_alloc > 1766 NL80211_RATE_INFO_EHT_RU_ALLOC_4x996)) 1767 return 0; 1768 if (WARN_ON_ONCE(rate->nss < 1 || rate->nss > 8)) 1769 return 0; 1770 1771 /* Bandwidth checks for MCS 14 */ 1772 if (rate->mcs == 14) { 1773 if ((rate->bw != RATE_INFO_BW_EHT_RU && 1774 rate->bw != RATE_INFO_BW_80 && 1775 rate->bw != RATE_INFO_BW_160 && 1776 rate->bw != RATE_INFO_BW_320) || 1777 (rate->bw == RATE_INFO_BW_EHT_RU && 1778 rate->eht_ru_alloc != NL80211_RATE_INFO_EHT_RU_ALLOC_996 && 1779 rate->eht_ru_alloc != NL80211_RATE_INFO_EHT_RU_ALLOC_2x996 && 1780 rate->eht_ru_alloc != NL80211_RATE_INFO_EHT_RU_ALLOC_4x996)) { 1781 WARN(1, "invalid EHT BW for MCS 14: bw:%d, ru:%d\n", 1782 rate->bw, rate->eht_ru_alloc); 1783 return 0; 1784 } 1785 } 1786 1787 if (rate->bw == RATE_INFO_BW_320 || 1788 (rate->bw == RATE_INFO_BW_EHT_RU && 1789 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_4x996)) 1790 result = 4 * rates_996[rate->eht_gi]; 1791 else if (rate->bw == RATE_INFO_BW_EHT_RU && 1792 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_3x996P484) 1793 result = 3 * rates_996[rate->eht_gi] + rates_484[rate->eht_gi]; 1794 else if (rate->bw == RATE_INFO_BW_EHT_RU && 1795 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_3x996) 1796 result = 3 * rates_996[rate->eht_gi]; 1797 else if (rate->bw == RATE_INFO_BW_EHT_RU && 1798 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_2x996P484) 1799 result = 2 * rates_996[rate->eht_gi] + rates_484[rate->eht_gi]; 1800 else if (rate->bw == RATE_INFO_BW_160 || 1801 (rate->bw == RATE_INFO_BW_EHT_RU && 1802 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_2x996)) 1803 result = 2 * rates_996[rate->eht_gi]; 1804 else if (rate->bw == RATE_INFO_BW_EHT_RU && 1805 rate->eht_ru_alloc == 1806 NL80211_RATE_INFO_EHT_RU_ALLOC_996P484P242) 1807 result = rates_996[rate->eht_gi] + rates_484[rate->eht_gi] 1808 + rates_242[rate->eht_gi]; 1809 else if (rate->bw == RATE_INFO_BW_EHT_RU && 1810 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_996P484) 1811 result = rates_996[rate->eht_gi] + rates_484[rate->eht_gi]; 1812 else if (rate->bw == RATE_INFO_BW_80 || 1813 (rate->bw == RATE_INFO_BW_EHT_RU && 1814 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_996)) 1815 result = rates_996[rate->eht_gi]; 1816 else if (rate->bw == RATE_INFO_BW_EHT_RU && 1817 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_484P242) 1818 result = rates_484[rate->eht_gi] + rates_242[rate->eht_gi]; 1819 else if (rate->bw == RATE_INFO_BW_40 || 1820 (rate->bw == RATE_INFO_BW_EHT_RU && 1821 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_484)) 1822 result = rates_484[rate->eht_gi]; 1823 else if (rate->bw == RATE_INFO_BW_20 || 1824 (rate->bw == RATE_INFO_BW_EHT_RU && 1825 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_242)) 1826 result = rates_242[rate->eht_gi]; 1827 else if (rate->bw == RATE_INFO_BW_EHT_RU && 1828 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_106P26) 1829 result = rates_106[rate->eht_gi] + rates_26[rate->eht_gi]; 1830 else if (rate->bw == RATE_INFO_BW_EHT_RU && 1831 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_106) 1832 result = rates_106[rate->eht_gi]; 1833 else if (rate->bw == RATE_INFO_BW_EHT_RU && 1834 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_52P26) 1835 result = rates_52[rate->eht_gi] + rates_26[rate->eht_gi]; 1836 else if (rate->bw == RATE_INFO_BW_EHT_RU && 1837 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_52) 1838 result = rates_52[rate->eht_gi]; 1839 else if (rate->bw == RATE_INFO_BW_EHT_RU && 1840 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_26) 1841 result = rates_26[rate->eht_gi]; 1842 else { 1843 WARN(1, "invalid EHT or UHR MCS: bw:%d, ru:%d\n", 1844 rate->bw, rate->eht_ru_alloc); 1845 return 0; 1846 } 1847 1848 /* now scale to the appropriate MCS */ 1849 tmp = result; 1850 tmp *= SCALE; 1851 do_div(tmp, mcs_divisors[rate->mcs]); 1852 1853 /* and take NSS */ 1854 tmp *= rate->nss; 1855 do_div(tmp, 8); 1856 1857 /* and handle interference mitigation - 0.9x */ 1858 if (rate->flags & RATE_INFO_FLAGS_UHR_IM) { 1859 if (WARN(rate->nss != 1 || rate->mcs == 15, 1860 "invalid NSS or MCS for UHR IM\n")) 1861 return 0; 1862 tmp *= 9000; 1863 do_div(tmp, 10000); 1864 } 1865 1866 result = tmp; 1867 1868 return result / 10000; 1869 } 1870 1871 static u32 cfg80211_calculate_bitrate_eht(struct rate_info *rate) 1872 { 1873 if (WARN_ONCE(rate->mcs > 15, "bad EHT MCS %d\n", rate->mcs)) 1874 return 0; 1875 1876 if (WARN_ONCE(rate->flags & (RATE_INFO_FLAGS_UHR_ELR_MCS | 1877 RATE_INFO_FLAGS_UHR_IM), 1878 "bad EHT MCS flags 0x%x\n", rate->flags)) 1879 return 0; 1880 1881 return _cfg80211_calculate_bitrate_eht_uhr(rate); 1882 } 1883 1884 static u32 cfg80211_calculate_bitrate_uhr(struct rate_info *rate) 1885 { 1886 if (rate->flags & RATE_INFO_FLAGS_UHR_ELR_MCS) { 1887 WARN_ONCE(rate->eht_gi != NL80211_RATE_INFO_EHT_GI_1_6, 1888 "bad UHR ELR guard interval %d\n", 1889 rate->eht_gi); 1890 WARN_ONCE(rate->mcs > 1, "bad UHR ELR MCS %d\n", rate->mcs); 1891 WARN_ONCE(rate->nss != 1, "bad UHR ELR NSS %d\n", rate->nss); 1892 WARN_ONCE(rate->bw != RATE_INFO_BW_20, 1893 "bad UHR ELR bandwidth %d\n", 1894 rate->bw); 1895 WARN_ONCE(rate->flags & RATE_INFO_FLAGS_UHR_IM, 1896 "bad UHR MCS flags 0x%x\n", rate->flags); 1897 if (rate->mcs == 0) 1898 return 17; 1899 return 33; 1900 } 1901 1902 switch (rate->mcs) { 1903 case 0 ... 15: 1904 case 17: 1905 case 19: 1906 case 20: 1907 case 23: 1908 return _cfg80211_calculate_bitrate_eht_uhr(rate); 1909 } 1910 1911 WARN_ONCE(1, "bad UHR MCS %d\n", rate->mcs); 1912 return 0; 1913 } 1914 1915 static u32 cfg80211_calculate_bitrate_s1g(struct rate_info *rate) 1916 { 1917 /* For 1, 2, 4, 8 and 16 MHz channels */ 1918 static const u32 base[5][11] = { 1919 { 300000, 1920 600000, 1921 900000, 1922 1200000, 1923 1800000, 1924 2400000, 1925 2700000, 1926 3000000, 1927 3600000, 1928 4000000, 1929 /* MCS 10 supported in 1 MHz only */ 1930 150000, 1931 }, 1932 { 650000, 1933 1300000, 1934 1950000, 1935 2600000, 1936 3900000, 1937 5200000, 1938 5850000, 1939 6500000, 1940 7800000, 1941 /* MCS 9 not valid */ 1942 }, 1943 { 1350000, 1944 2700000, 1945 4050000, 1946 5400000, 1947 8100000, 1948 10800000, 1949 12150000, 1950 13500000, 1951 16200000, 1952 18000000, 1953 }, 1954 { 2925000, 1955 5850000, 1956 8775000, 1957 11700000, 1958 17550000, 1959 23400000, 1960 26325000, 1961 29250000, 1962 35100000, 1963 39000000, 1964 }, 1965 { 8580000, 1966 11700000, 1967 17550000, 1968 23400000, 1969 35100000, 1970 46800000, 1971 52650000, 1972 58500000, 1973 70200000, 1974 78000000, 1975 }, 1976 }; 1977 u32 bitrate; 1978 /* default is 1 MHz index */ 1979 int idx = 0; 1980 1981 if (rate->mcs >= 11) 1982 goto warn; 1983 1984 switch (rate->bw) { 1985 case RATE_INFO_BW_16: 1986 idx = 4; 1987 break; 1988 case RATE_INFO_BW_8: 1989 idx = 3; 1990 break; 1991 case RATE_INFO_BW_4: 1992 idx = 2; 1993 break; 1994 case RATE_INFO_BW_2: 1995 idx = 1; 1996 break; 1997 case RATE_INFO_BW_1: 1998 idx = 0; 1999 break; 2000 case RATE_INFO_BW_5: 2001 case RATE_INFO_BW_10: 2002 case RATE_INFO_BW_20: 2003 case RATE_INFO_BW_40: 2004 case RATE_INFO_BW_80: 2005 case RATE_INFO_BW_160: 2006 default: 2007 goto warn; 2008 } 2009 2010 bitrate = base[idx][rate->mcs]; 2011 bitrate *= rate->nss; 2012 2013 if (rate->flags & RATE_INFO_FLAGS_SHORT_GI) 2014 bitrate = (bitrate / 9) * 10; 2015 /* do NOT round down here */ 2016 return (bitrate + 50000) / 100000; 2017 warn: 2018 WARN_ONCE(1, "invalid rate bw=%d, mcs=%d, nss=%d\n", 2019 rate->bw, rate->mcs, rate->nss); 2020 return 0; 2021 } 2022 2023 u32 cfg80211_calculate_bitrate(struct rate_info *rate) 2024 { 2025 if (rate->flags & RATE_INFO_FLAGS_MCS) 2026 return cfg80211_calculate_bitrate_ht(rate); 2027 if (rate->flags & RATE_INFO_FLAGS_DMG) 2028 return cfg80211_calculate_bitrate_dmg(rate); 2029 if (rate->flags & RATE_INFO_FLAGS_EXTENDED_SC_DMG) 2030 return cfg80211_calculate_bitrate_extended_sc_dmg(rate); 2031 if (rate->flags & RATE_INFO_FLAGS_EDMG) 2032 return cfg80211_calculate_bitrate_edmg(rate); 2033 if (rate->flags & RATE_INFO_FLAGS_VHT_MCS) 2034 return cfg80211_calculate_bitrate_vht(rate); 2035 if (rate->flags & RATE_INFO_FLAGS_HE_MCS) 2036 return cfg80211_calculate_bitrate_he(rate); 2037 if (rate->flags & RATE_INFO_FLAGS_EHT_MCS) 2038 return cfg80211_calculate_bitrate_eht(rate); 2039 if (rate->flags & RATE_INFO_FLAGS_UHR_MCS) 2040 return cfg80211_calculate_bitrate_uhr(rate); 2041 if (rate->flags & RATE_INFO_FLAGS_S1G_MCS) 2042 return cfg80211_calculate_bitrate_s1g(rate); 2043 2044 return rate->legacy; 2045 } 2046 EXPORT_SYMBOL(cfg80211_calculate_bitrate); 2047 2048 int cfg80211_get_p2p_attr(const u8 *ies, unsigned int len, 2049 enum ieee80211_p2p_attr_id attr, 2050 u8 *buf, unsigned int bufsize) 2051 { 2052 u8 *out = buf; 2053 u16 attr_remaining = 0; 2054 bool desired_attr = false; 2055 u16 desired_len = 0; 2056 2057 while (len > 0) { 2058 unsigned int iedatalen; 2059 unsigned int copy; 2060 const u8 *iedata; 2061 2062 if (len < 2) 2063 return -EILSEQ; 2064 iedatalen = ies[1]; 2065 if (iedatalen + 2 > len) 2066 return -EILSEQ; 2067 2068 if (ies[0] != WLAN_EID_VENDOR_SPECIFIC) 2069 goto cont; 2070 2071 if (iedatalen < 4) 2072 goto cont; 2073 2074 iedata = ies + 2; 2075 2076 /* check WFA OUI, P2P subtype */ 2077 if (iedata[0] != 0x50 || iedata[1] != 0x6f || 2078 iedata[2] != 0x9a || iedata[3] != 0x09) 2079 goto cont; 2080 2081 iedatalen -= 4; 2082 iedata += 4; 2083 2084 /* check attribute continuation into this IE */ 2085 copy = min_t(unsigned int, attr_remaining, iedatalen); 2086 if (copy && desired_attr) { 2087 desired_len += copy; 2088 if (out) { 2089 memcpy(out, iedata, min(bufsize, copy)); 2090 out += min(bufsize, copy); 2091 bufsize -= min(bufsize, copy); 2092 } 2093 2094 2095 if (copy == attr_remaining) 2096 return desired_len; 2097 } 2098 2099 attr_remaining -= copy; 2100 if (attr_remaining) 2101 goto cont; 2102 2103 iedatalen -= copy; 2104 iedata += copy; 2105 2106 while (iedatalen > 0) { 2107 u16 attr_len; 2108 2109 /* P2P attribute ID & size must fit */ 2110 if (iedatalen < 3) 2111 return -EILSEQ; 2112 desired_attr = iedata[0] == attr; 2113 attr_len = get_unaligned_le16(iedata + 1); 2114 iedatalen -= 3; 2115 iedata += 3; 2116 2117 copy = min_t(unsigned int, attr_len, iedatalen); 2118 2119 if (desired_attr) { 2120 desired_len += copy; 2121 if (out) { 2122 memcpy(out, iedata, min(bufsize, copy)); 2123 out += min(bufsize, copy); 2124 bufsize -= min(bufsize, copy); 2125 } 2126 2127 if (copy == attr_len) 2128 return desired_len; 2129 } 2130 2131 iedata += copy; 2132 iedatalen -= copy; 2133 attr_remaining = attr_len - copy; 2134 } 2135 2136 cont: 2137 len -= ies[1] + 2; 2138 ies += ies[1] + 2; 2139 } 2140 2141 if (attr_remaining && desired_attr) 2142 return -EILSEQ; 2143 2144 return -ENOENT; 2145 } 2146 EXPORT_SYMBOL(cfg80211_get_p2p_attr); 2147 2148 static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id, bool id_ext) 2149 { 2150 int i; 2151 2152 /* Make sure array values are legal */ 2153 if (WARN_ON(ids[n_ids - 1] == WLAN_EID_EXTENSION)) 2154 return false; 2155 2156 i = 0; 2157 while (i < n_ids) { 2158 if (ids[i] == WLAN_EID_EXTENSION) { 2159 if (id_ext && (ids[i + 1] == id)) 2160 return true; 2161 2162 i += 2; 2163 continue; 2164 } 2165 2166 if (ids[i] == id && !id_ext) 2167 return true; 2168 2169 i++; 2170 } 2171 return false; 2172 } 2173 2174 static size_t skip_ie(const u8 *ies, size_t ielen, size_t pos) 2175 { 2176 /* we assume a validly formed IEs buffer */ 2177 u8 len = ies[pos + 1]; 2178 2179 pos += 2 + len; 2180 2181 /* the IE itself must have 255 bytes for fragments to follow */ 2182 if (len < 255) 2183 return pos; 2184 2185 while (pos < ielen && ies[pos] == WLAN_EID_FRAGMENT) { 2186 len = ies[pos + 1]; 2187 pos += 2 + len; 2188 } 2189 2190 return pos; 2191 } 2192 2193 size_t ieee80211_ie_split_ric(const u8 *ies, size_t ielen, 2194 const u8 *ids, int n_ids, 2195 const u8 *after_ric, int n_after_ric, 2196 size_t offset) 2197 { 2198 size_t pos = offset; 2199 2200 while (pos < ielen) { 2201 u8 ext = 0; 2202 2203 if (ies[pos] == WLAN_EID_EXTENSION) 2204 ext = 2; 2205 if ((pos + ext) >= ielen) 2206 break; 2207 2208 if (!ieee80211_id_in_list(ids, n_ids, ies[pos + ext], 2209 ies[pos] == WLAN_EID_EXTENSION)) 2210 break; 2211 2212 if (ies[pos] == WLAN_EID_RIC_DATA && n_after_ric) { 2213 pos = skip_ie(ies, ielen, pos); 2214 2215 while (pos < ielen) { 2216 if (ies[pos] == WLAN_EID_EXTENSION) 2217 ext = 2; 2218 else 2219 ext = 0; 2220 2221 if ((pos + ext) >= ielen) 2222 break; 2223 2224 if (!ieee80211_id_in_list(after_ric, 2225 n_after_ric, 2226 ies[pos + ext], 2227 ext == 2)) 2228 pos = skip_ie(ies, ielen, pos); 2229 else 2230 break; 2231 } 2232 } else { 2233 pos = skip_ie(ies, ielen, pos); 2234 } 2235 } 2236 2237 return pos; 2238 } 2239 EXPORT_SYMBOL(ieee80211_ie_split_ric); 2240 2241 void ieee80211_fragment_element(struct sk_buff *skb, u8 *len_pos, u8 frag_id) 2242 { 2243 unsigned int elem_len; 2244 2245 if (!len_pos) 2246 return; 2247 2248 elem_len = skb->data + skb->len - len_pos - 1; 2249 2250 while (elem_len > 255) { 2251 /* this one is 255 */ 2252 *len_pos = 255; 2253 /* remaining data gets smaller */ 2254 elem_len -= 255; 2255 /* make space for the fragment ID/len in SKB */ 2256 skb_put(skb, 2); 2257 /* shift back the remaining data to place fragment ID/len */ 2258 memmove(len_pos + 255 + 3, len_pos + 255 + 1, elem_len); 2259 /* place the fragment ID */ 2260 len_pos += 255 + 1; 2261 *len_pos = frag_id; 2262 /* and point to fragment length to update later */ 2263 len_pos++; 2264 } 2265 2266 *len_pos = elem_len; 2267 } 2268 EXPORT_SYMBOL(ieee80211_fragment_element); 2269 2270 bool ieee80211_operating_class_to_band(u8 operating_class, 2271 enum nl80211_band *band) 2272 { 2273 switch (operating_class) { 2274 case 112: 2275 case 115 ... 127: 2276 case 128 ... 130: 2277 *band = NL80211_BAND_5GHZ; 2278 return true; 2279 case 131 ... 135: 2280 case 137: 2281 *band = NL80211_BAND_6GHZ; 2282 return true; 2283 case 81: 2284 case 82: 2285 case 83: 2286 case 84: 2287 *band = NL80211_BAND_2GHZ; 2288 return true; 2289 case 180: 2290 *band = NL80211_BAND_60GHZ; 2291 return true; 2292 } 2293 2294 return false; 2295 } 2296 EXPORT_SYMBOL(ieee80211_operating_class_to_band); 2297 2298 bool ieee80211_operating_class_to_chandef(u8 operating_class, 2299 struct ieee80211_channel *chan, 2300 struct cfg80211_chan_def *chandef) 2301 { 2302 u32 control_freq, offset = 0; 2303 enum nl80211_band band; 2304 2305 if (!ieee80211_operating_class_to_band(operating_class, &band) || 2306 !chan || band != chan->band) 2307 return false; 2308 2309 control_freq = chan->center_freq; 2310 chandef->chan = chan; 2311 2312 if (control_freq >= 5955) 2313 offset = control_freq - 5955; 2314 else if (control_freq >= 5745) 2315 offset = control_freq - 5745; 2316 else if (control_freq >= 5180) 2317 offset = control_freq - 5180; 2318 offset /= 20; 2319 2320 switch (operating_class) { 2321 case 81: /* 2 GHz band; 20 MHz; channels 1..13 */ 2322 case 82: /* 2 GHz band; 20 MHz; channel 14 */ 2323 case 115: /* 5 GHz band; 20 MHz; channels 36,40,44,48 */ 2324 case 118: /* 5 GHz band; 20 MHz; channels 52,56,60,64 */ 2325 case 121: /* 5 GHz band; 20 MHz; channels 100..144 */ 2326 case 124: /* 5 GHz band; 20 MHz; channels 149,153,157,161 */ 2327 case 125: /* 5 GHz band; 20 MHz; channels 149..177 */ 2328 case 131: /* 6 GHz band; 20 MHz; channels 1..233*/ 2329 case 136: /* 6 GHz band; 20 MHz; channel 2 */ 2330 chandef->center_freq1 = control_freq; 2331 chandef->width = NL80211_CHAN_WIDTH_20; 2332 return true; 2333 case 83: /* 2 GHz band; 40 MHz; channels 1..9 */ 2334 case 116: /* 5 GHz band; 40 MHz; channels 36,44 */ 2335 case 119: /* 5 GHz band; 40 MHz; channels 52,60 */ 2336 case 122: /* 5 GHz band; 40 MHz; channels 100,108,116,124,132,140 */ 2337 case 126: /* 5 GHz band; 40 MHz; channels 149,157,165,173 */ 2338 chandef->center_freq1 = control_freq + 10; 2339 chandef->width = NL80211_CHAN_WIDTH_40; 2340 return true; 2341 case 84: /* 2 GHz band; 40 MHz; channels 5..13 */ 2342 case 117: /* 5 GHz band; 40 MHz; channels 40,48 */ 2343 case 120: /* 5 GHz band; 40 MHz; channels 56,64 */ 2344 case 123: /* 5 GHz band; 40 MHz; channels 104,112,120,128,136,144 */ 2345 case 127: /* 5 GHz band; 40 MHz; channels 153,161,169,177 */ 2346 chandef->center_freq1 = control_freq - 10; 2347 chandef->width = NL80211_CHAN_WIDTH_40; 2348 return true; 2349 case 132: /* 6 GHz band; 40 MHz; channels 1,5,..,229*/ 2350 chandef->center_freq1 = control_freq + 10 - (offset & 1) * 20; 2351 chandef->width = NL80211_CHAN_WIDTH_40; 2352 return true; 2353 case 128: /* 5 GHz band; 80 MHz; channels 36..64,100..144,149..177 */ 2354 case 133: /* 6 GHz band; 80 MHz; channels 1,5,..,229 */ 2355 chandef->center_freq1 = control_freq + 30 - (offset & 3) * 20; 2356 chandef->width = NL80211_CHAN_WIDTH_80; 2357 return true; 2358 case 129: /* 5 GHz band; 160 MHz; channels 36..64,100..144,149..177 */ 2359 case 134: /* 6 GHz band; 160 MHz; channels 1,5,..,229 */ 2360 chandef->center_freq1 = control_freq + 70 - (offset & 7) * 20; 2361 chandef->width = NL80211_CHAN_WIDTH_160; 2362 return true; 2363 case 130: /* 5 GHz band; 80+80 MHz; channels 36..64,100..144,149..177 */ 2364 case 135: /* 6 GHz band; 80+80 MHz; channels 1,5,..,229 */ 2365 /* The center_freq2 of 80+80 MHz is unknown */ 2366 case 137: /* 6 GHz band; 320 MHz; channels 1,5,..,229 */ 2367 /* 320-1 or 320-2 channelization is unknown */ 2368 default: 2369 return false; 2370 } 2371 } 2372 EXPORT_SYMBOL(ieee80211_operating_class_to_chandef); 2373 2374 bool ieee80211_chandef_to_operating_class(struct cfg80211_chan_def *chandef, 2375 u8 *op_class) 2376 { 2377 u8 vht_opclass; 2378 u32 freq = chandef->center_freq1; 2379 2380 if (freq >= 2412 && freq <= 2472) { 2381 if (chandef->width > NL80211_CHAN_WIDTH_40) 2382 return false; 2383 2384 /* 2.407 GHz, channels 1..13 */ 2385 if (chandef->width == NL80211_CHAN_WIDTH_40) { 2386 if (freq > chandef->chan->center_freq) 2387 *op_class = 83; /* HT40+ */ 2388 else 2389 *op_class = 84; /* HT40- */ 2390 } else { 2391 *op_class = 81; 2392 } 2393 2394 return true; 2395 } 2396 2397 if (freq == 2484) { 2398 /* channel 14 is only for IEEE 802.11b */ 2399 if (chandef->width != NL80211_CHAN_WIDTH_20_NOHT) 2400 return false; 2401 2402 *op_class = 82; /* channel 14 */ 2403 return true; 2404 } 2405 2406 switch (chandef->width) { 2407 case NL80211_CHAN_WIDTH_80: 2408 vht_opclass = 128; 2409 break; 2410 case NL80211_CHAN_WIDTH_160: 2411 vht_opclass = 129; 2412 break; 2413 case NL80211_CHAN_WIDTH_80P80: 2414 vht_opclass = 130; 2415 break; 2416 default: 2417 vht_opclass = 0; 2418 break; 2419 } 2420 2421 /* 5 GHz, channels 36..48 */ 2422 if (freq >= 5180 && freq <= 5240) { 2423 if (vht_opclass) { 2424 *op_class = vht_opclass; 2425 } else if (chandef->width == NL80211_CHAN_WIDTH_40) { 2426 if (freq > chandef->chan->center_freq) 2427 *op_class = 116; 2428 else 2429 *op_class = 117; 2430 } else { 2431 *op_class = 115; 2432 } 2433 2434 return true; 2435 } 2436 2437 /* 5 GHz, channels 52..64 */ 2438 if (freq >= 5260 && freq <= 5320) { 2439 if (vht_opclass) { 2440 *op_class = vht_opclass; 2441 } else if (chandef->width == NL80211_CHAN_WIDTH_40) { 2442 if (freq > chandef->chan->center_freq) 2443 *op_class = 119; 2444 else 2445 *op_class = 120; 2446 } else { 2447 *op_class = 118; 2448 } 2449 2450 return true; 2451 } 2452 2453 /* 5 GHz, channels 100..144 */ 2454 if (freq >= 5500 && freq <= 5720) { 2455 if (vht_opclass) { 2456 *op_class = vht_opclass; 2457 } else if (chandef->width == NL80211_CHAN_WIDTH_40) { 2458 if (freq > chandef->chan->center_freq) 2459 *op_class = 122; 2460 else 2461 *op_class = 123; 2462 } else { 2463 *op_class = 121; 2464 } 2465 2466 return true; 2467 } 2468 2469 /* 5 GHz, channels 149..169 */ 2470 if (freq >= 5745 && freq <= 5845) { 2471 if (vht_opclass) { 2472 *op_class = vht_opclass; 2473 } else if (chandef->width == NL80211_CHAN_WIDTH_40) { 2474 if (freq > chandef->chan->center_freq) 2475 *op_class = 126; 2476 else 2477 *op_class = 127; 2478 } else if (freq <= 5805) { 2479 *op_class = 124; 2480 } else { 2481 *op_class = 125; 2482 } 2483 2484 return true; 2485 } 2486 2487 /* 56.16 GHz, channel 1..4 */ 2488 if (freq >= 56160 + 2160 * 1 && freq <= 56160 + 2160 * 6) { 2489 if (chandef->width >= NL80211_CHAN_WIDTH_40) 2490 return false; 2491 2492 *op_class = 180; 2493 return true; 2494 } 2495 2496 /* not supported yet */ 2497 return false; 2498 } 2499 EXPORT_SYMBOL(ieee80211_chandef_to_operating_class); 2500 2501 static int cfg80211_wdev_bi(struct wireless_dev *wdev) 2502 { 2503 switch (wdev->iftype) { 2504 case NL80211_IFTYPE_AP: 2505 case NL80211_IFTYPE_P2P_GO: 2506 WARN_ON(wdev->valid_links); 2507 return wdev->links[0].ap.beacon_interval; 2508 case NL80211_IFTYPE_MESH_POINT: 2509 return wdev->u.mesh.beacon_interval; 2510 case NL80211_IFTYPE_ADHOC: 2511 return wdev->u.ibss.beacon_interval; 2512 default: 2513 break; 2514 } 2515 2516 return 0; 2517 } 2518 2519 static void cfg80211_calculate_bi_data(struct wiphy *wiphy, u32 new_beacon_int, 2520 u32 *beacon_int_gcd, 2521 bool *beacon_int_different, 2522 int radio_idx) 2523 { 2524 struct cfg80211_registered_device *rdev; 2525 struct wireless_dev *wdev; 2526 2527 *beacon_int_gcd = 0; 2528 *beacon_int_different = false; 2529 2530 rdev = wiphy_to_rdev(wiphy); 2531 list_for_each_entry(wdev, &wiphy->wdev_list, list) { 2532 int wdev_bi; 2533 2534 /* this feature isn't supported with MLO */ 2535 if (wdev->valid_links) 2536 continue; 2537 2538 wdev_bi = cfg80211_wdev_bi(wdev); 2539 if (!wdev_bi) 2540 continue; 2541 2542 /* skip wdevs not active on the given wiphy radio */ 2543 if (radio_idx >= 0 && 2544 !(rdev_get_radio_mask(rdev, wdev->netdev) & BIT(radio_idx))) 2545 continue; 2546 2547 if (!*beacon_int_gcd) { 2548 *beacon_int_gcd = wdev_bi; 2549 continue; 2550 } 2551 2552 if (wdev_bi == *beacon_int_gcd) 2553 continue; 2554 2555 *beacon_int_different = true; 2556 *beacon_int_gcd = gcd(*beacon_int_gcd, wdev_bi); 2557 } 2558 2559 if (new_beacon_int && *beacon_int_gcd != new_beacon_int) { 2560 if (*beacon_int_gcd) 2561 *beacon_int_different = true; 2562 *beacon_int_gcd = gcd(*beacon_int_gcd, new_beacon_int); 2563 } 2564 } 2565 2566 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev, 2567 enum nl80211_iftype iftype, u32 beacon_int) 2568 { 2569 /* 2570 * This is just a basic pre-condition check; if interface combinations 2571 * are possible the driver must already be checking those with a call 2572 * to cfg80211_check_combinations(), in which case we'll validate more 2573 * through the cfg80211_calculate_bi_data() call and code in 2574 * cfg80211_iter_combinations(). 2575 */ 2576 2577 if (beacon_int < 10 || beacon_int > 10000) 2578 return -EINVAL; 2579 2580 return 0; 2581 } 2582 2583 int cfg80211_iter_combinations(struct wiphy *wiphy, 2584 struct iface_combination_params *params, 2585 void (*iter)(const struct ieee80211_iface_combination *c, 2586 void *data), 2587 void *data) 2588 { 2589 const struct wiphy_radio *radio = NULL; 2590 const struct ieee80211_iface_combination *c, *cs; 2591 const struct ieee80211_regdomain *regdom; 2592 enum nl80211_dfs_regions region = 0; 2593 int i, j, n, iftype; 2594 int num_interfaces = 0; 2595 u32 used_iftypes = 0; 2596 u32 beacon_int_gcd; 2597 bool beacon_int_different; 2598 2599 if (params->radio_idx >= 0) 2600 radio = &wiphy->radio[params->radio_idx]; 2601 2602 /* 2603 * This is a bit strange, since the iteration used to rely only on 2604 * the data given by the driver, but here it now relies on context, 2605 * in form of the currently operating interfaces. 2606 * This is OK for all current users, and saves us from having to 2607 * push the GCD calculations into all the drivers. 2608 * In the future, this should probably rely more on data that's in 2609 * cfg80211 already - the only thing not would appear to be any new 2610 * interfaces (while being brought up) and channel/radar data. 2611 */ 2612 cfg80211_calculate_bi_data(wiphy, params->new_beacon_int, 2613 &beacon_int_gcd, &beacon_int_different, 2614 params->radio_idx); 2615 2616 if (params->radar_detect) { 2617 rcu_read_lock(); 2618 regdom = rcu_dereference(cfg80211_regdomain); 2619 if (regdom) 2620 region = regdom->dfs_region; 2621 rcu_read_unlock(); 2622 } 2623 2624 for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) { 2625 num_interfaces += params->iftype_num[iftype]; 2626 if (params->iftype_num[iftype] > 0 && 2627 !cfg80211_iftype_allowed(wiphy, iftype, 0, 1)) 2628 used_iftypes |= BIT(iftype); 2629 } 2630 2631 if (radio) { 2632 cs = radio->iface_combinations; 2633 n = radio->n_iface_combinations; 2634 } else { 2635 cs = wiphy->iface_combinations; 2636 n = wiphy->n_iface_combinations; 2637 } 2638 for (i = 0; i < n; i++) { 2639 struct ieee80211_iface_limit *limits; 2640 u32 all_iftypes = 0; 2641 2642 c = &cs[i]; 2643 if (num_interfaces > c->max_interfaces) 2644 continue; 2645 if (params->num_different_channels > c->num_different_channels) 2646 continue; 2647 2648 limits = kmemdup_array(c->limits, c->n_limits, sizeof(*limits), 2649 GFP_KERNEL); 2650 if (!limits) 2651 return -ENOMEM; 2652 2653 for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) { 2654 if (cfg80211_iftype_allowed(wiphy, iftype, 0, 1)) 2655 continue; 2656 for (j = 0; j < c->n_limits; j++) { 2657 all_iftypes |= limits[j].types; 2658 if (!(limits[j].types & BIT(iftype))) 2659 continue; 2660 if (limits[j].max < params->iftype_num[iftype]) 2661 goto cont; 2662 limits[j].max -= params->iftype_num[iftype]; 2663 } 2664 } 2665 2666 if (params->radar_detect != 2667 (c->radar_detect_widths & params->radar_detect)) 2668 goto cont; 2669 2670 if (params->radar_detect && c->radar_detect_regions && 2671 !(c->radar_detect_regions & BIT(region))) 2672 goto cont; 2673 2674 /* Finally check that all iftypes that we're currently 2675 * using are actually part of this combination. If they 2676 * aren't then we can't use this combination and have 2677 * to continue to the next. 2678 */ 2679 if ((all_iftypes & used_iftypes) != used_iftypes) 2680 goto cont; 2681 2682 if (beacon_int_gcd) { 2683 if (c->beacon_int_min_gcd && 2684 beacon_int_gcd < c->beacon_int_min_gcd) 2685 goto cont; 2686 if (!c->beacon_int_min_gcd && beacon_int_different) 2687 goto cont; 2688 } 2689 2690 /* This combination covered all interface types and 2691 * supported the requested numbers, so we're good. 2692 */ 2693 2694 (*iter)(c, data); 2695 cont: 2696 kfree(limits); 2697 } 2698 2699 return 0; 2700 } 2701 EXPORT_SYMBOL(cfg80211_iter_combinations); 2702 2703 static void 2704 cfg80211_iter_sum_ifcombs(const struct ieee80211_iface_combination *c, 2705 void *data) 2706 { 2707 int *num = data; 2708 (*num)++; 2709 } 2710 2711 int cfg80211_check_combinations(struct wiphy *wiphy, 2712 struct iface_combination_params *params) 2713 { 2714 int err, num = 0; 2715 2716 err = cfg80211_iter_combinations(wiphy, params, 2717 cfg80211_iter_sum_ifcombs, &num); 2718 if (err) 2719 return err; 2720 if (num == 0) 2721 return -EBUSY; 2722 2723 return 0; 2724 } 2725 EXPORT_SYMBOL(cfg80211_check_combinations); 2726 2727 int cfg80211_get_radio_idx_by_chan(struct wiphy *wiphy, 2728 const struct ieee80211_channel *chan) 2729 { 2730 const struct wiphy_radio *radio; 2731 int i, j; 2732 u32 freq; 2733 2734 if (!chan) 2735 return -EINVAL; 2736 2737 freq = ieee80211_channel_to_khz(chan); 2738 for (i = 0; i < wiphy->n_radio; i++) { 2739 radio = &wiphy->radio[i]; 2740 for (j = 0; j < radio->n_freq_range; j++) { 2741 if (freq >= radio->freq_range[j].start_freq && 2742 freq < radio->freq_range[j].end_freq) 2743 return i; 2744 } 2745 } 2746 2747 return -EINVAL; 2748 } 2749 EXPORT_SYMBOL(cfg80211_get_radio_idx_by_chan); 2750 2751 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband, 2752 const u8 *rates, unsigned int n_rates, 2753 u32 *mask) 2754 { 2755 int i, j; 2756 2757 if (!sband) 2758 return -EINVAL; 2759 2760 if (n_rates == 0 || n_rates > NL80211_MAX_SUPP_RATES) 2761 return -EINVAL; 2762 2763 *mask = 0; 2764 2765 for (i = 0; i < n_rates; i++) { 2766 int rate = (rates[i] & 0x7f) * 5; 2767 bool found = false; 2768 2769 for (j = 0; j < sband->n_bitrates; j++) { 2770 if (sband->bitrates[j].bitrate == rate) { 2771 found = true; 2772 *mask |= BIT(j); 2773 break; 2774 } 2775 } 2776 if (!found) 2777 return -EINVAL; 2778 } 2779 2780 /* 2781 * mask must have at least one bit set here since we 2782 * didn't accept a 0-length rates array nor allowed 2783 * entries in the array that didn't exist 2784 */ 2785 2786 return 0; 2787 } 2788 2789 unsigned int ieee80211_get_num_supported_channels(struct wiphy *wiphy) 2790 { 2791 enum nl80211_band band; 2792 unsigned int n_channels = 0; 2793 2794 for (band = 0; band < NUM_NL80211_BANDS; band++) 2795 if (wiphy->bands[band]) 2796 n_channels += wiphy->bands[band]->n_channels; 2797 2798 return n_channels; 2799 } 2800 EXPORT_SYMBOL(ieee80211_get_num_supported_channels); 2801 2802 int cfg80211_get_station(struct net_device *dev, const u8 *mac_addr, 2803 struct station_info *sinfo) 2804 { 2805 struct cfg80211_registered_device *rdev; 2806 struct wireless_dev *wdev; 2807 2808 wdev = dev->ieee80211_ptr; 2809 if (!wdev) 2810 return -EOPNOTSUPP; 2811 2812 rdev = wiphy_to_rdev(wdev->wiphy); 2813 if (!rdev->ops->get_station) 2814 return -EOPNOTSUPP; 2815 2816 memset(sinfo, 0, sizeof(*sinfo)); 2817 2818 guard(wiphy)(&rdev->wiphy); 2819 2820 return rdev_get_station(rdev, wdev, mac_addr, sinfo); 2821 } 2822 EXPORT_SYMBOL(cfg80211_get_station); 2823 2824 void cfg80211_free_nan_func(struct cfg80211_nan_func *f) 2825 { 2826 int i; 2827 2828 if (!f) 2829 return; 2830 2831 kfree(f->serv_spec_info); 2832 kfree(f->srf_bf); 2833 kfree(f->srf_macs); 2834 for (i = 0; i < f->num_rx_filters; i++) 2835 kfree(f->rx_filters[i].filter); 2836 2837 for (i = 0; i < f->num_tx_filters; i++) 2838 kfree(f->tx_filters[i].filter); 2839 2840 kfree(f->rx_filters); 2841 kfree(f->tx_filters); 2842 kfree(f); 2843 } 2844 EXPORT_SYMBOL(cfg80211_free_nan_func); 2845 2846 bool cfg80211_does_bw_fit_range(const struct ieee80211_freq_range *freq_range, 2847 u32 center_freq_khz, u32 bw_khz) 2848 { 2849 u32 start_freq_khz, end_freq_khz; 2850 2851 start_freq_khz = center_freq_khz - (bw_khz / 2); 2852 end_freq_khz = center_freq_khz + (bw_khz / 2); 2853 2854 if (start_freq_khz >= freq_range->start_freq_khz && 2855 end_freq_khz <= freq_range->end_freq_khz) 2856 return true; 2857 2858 return false; 2859 } 2860 2861 int cfg80211_link_sinfo_alloc_tid_stats(struct link_station_info *link_sinfo, 2862 gfp_t gfp) 2863 { 2864 link_sinfo->pertid = kzalloc_objs(*link_sinfo->pertid, 2865 IEEE80211_NUM_TIDS + 1, gfp); 2866 if (!link_sinfo->pertid) 2867 return -ENOMEM; 2868 2869 return 0; 2870 } 2871 EXPORT_SYMBOL(cfg80211_link_sinfo_alloc_tid_stats); 2872 2873 int cfg80211_sinfo_alloc_tid_stats(struct station_info *sinfo, gfp_t gfp) 2874 { 2875 sinfo->pertid = kzalloc_objs(*(sinfo->pertid), IEEE80211_NUM_TIDS + 1, 2876 gfp); 2877 if (!sinfo->pertid) 2878 return -ENOMEM; 2879 2880 return 0; 2881 } 2882 EXPORT_SYMBOL(cfg80211_sinfo_alloc_tid_stats); 2883 2884 /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */ 2885 /* Ethernet-II snap header (RFC1042 for most EtherTypes) */ 2886 const unsigned char rfc1042_header[] __aligned(2) = 2887 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 }; 2888 EXPORT_SYMBOL(rfc1042_header); 2889 2890 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */ 2891 const unsigned char bridge_tunnel_header[] __aligned(2) = 2892 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 }; 2893 EXPORT_SYMBOL(bridge_tunnel_header); 2894 2895 /* Layer 2 Update frame (802.2 Type 1 LLC XID Update response) */ 2896 struct iapp_layer2_update { 2897 u8 da[ETH_ALEN]; /* broadcast */ 2898 u8 sa[ETH_ALEN]; /* STA addr */ 2899 __be16 len; /* 6 */ 2900 u8 dsap; /* 0 */ 2901 u8 ssap; /* 0 */ 2902 u8 control; 2903 u8 xid_info[3]; 2904 } __packed; 2905 2906 void cfg80211_send_layer2_update(struct net_device *dev, const u8 *addr) 2907 { 2908 struct iapp_layer2_update *msg; 2909 struct sk_buff *skb; 2910 2911 /* Send Level 2 Update Frame to update forwarding tables in layer 2 2912 * bridge devices */ 2913 2914 skb = dev_alloc_skb(sizeof(*msg)); 2915 if (!skb) 2916 return; 2917 msg = skb_put(skb, sizeof(*msg)); 2918 2919 /* 802.2 Type 1 Logical Link Control (LLC) Exchange Identifier (XID) 2920 * Update response frame; IEEE Std 802.2-1998, 5.4.1.2.1 */ 2921 2922 eth_broadcast_addr(msg->da); 2923 ether_addr_copy(msg->sa, addr); 2924 msg->len = htons(6); 2925 msg->dsap = 0; 2926 msg->ssap = 0x01; /* NULL LSAP, CR Bit: Response */ 2927 msg->control = 0xaf; /* XID response lsb.1111F101. 2928 * F=0 (no poll command; unsolicited frame) */ 2929 msg->xid_info[0] = 0x81; /* XID format identifier */ 2930 msg->xid_info[1] = 1; /* LLC types/classes: Type 1 LLC */ 2931 msg->xid_info[2] = 0; /* XID sender's receive window size (RW) */ 2932 2933 skb->dev = dev; 2934 skb->protocol = eth_type_trans(skb, dev); 2935 memset(skb->cb, 0, sizeof(skb->cb)); 2936 netif_rx(skb); 2937 } 2938 EXPORT_SYMBOL(cfg80211_send_layer2_update); 2939 2940 int ieee80211_get_vht_max_nss(struct ieee80211_vht_cap *cap, 2941 enum ieee80211_vht_chanwidth bw, 2942 int mcs, bool ext_nss_bw_capable, 2943 unsigned int max_vht_nss) 2944 { 2945 u16 map = le16_to_cpu(cap->supp_mcs.rx_mcs_map); 2946 int ext_nss_bw; 2947 int supp_width; 2948 int i, mcs_encoding; 2949 2950 if (map == 0xffff) 2951 return 0; 2952 2953 if (WARN_ON(mcs > 9 || max_vht_nss > 8)) 2954 return 0; 2955 if (mcs <= 7) 2956 mcs_encoding = 0; 2957 else if (mcs == 8) 2958 mcs_encoding = 1; 2959 else 2960 mcs_encoding = 2; 2961 2962 if (!max_vht_nss) { 2963 /* find max_vht_nss for the given MCS */ 2964 for (i = 7; i >= 0; i--) { 2965 int supp = (map >> (2 * i)) & 3; 2966 2967 if (supp == 3) 2968 continue; 2969 2970 if (supp >= mcs_encoding) { 2971 max_vht_nss = i + 1; 2972 break; 2973 } 2974 } 2975 } 2976 2977 if (!(cap->supp_mcs.tx_mcs_map & 2978 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE))) 2979 return max_vht_nss; 2980 2981 ext_nss_bw = le32_get_bits(cap->vht_cap_info, 2982 IEEE80211_VHT_CAP_EXT_NSS_BW_MASK); 2983 supp_width = le32_get_bits(cap->vht_cap_info, 2984 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK); 2985 2986 /* if not capable, treat ext_nss_bw as 0 */ 2987 if (!ext_nss_bw_capable) 2988 ext_nss_bw = 0; 2989 2990 /* This is invalid */ 2991 if (supp_width == 3) 2992 return 0; 2993 2994 /* This is an invalid combination so pretend nothing is supported */ 2995 if (supp_width == 2 && (ext_nss_bw == 1 || ext_nss_bw == 2)) 2996 return 0; 2997 2998 /* 2999 * Cover all the special cases according to IEEE 802.11-2016 3000 * Table 9-250. All other cases are either factor of 1 or not 3001 * valid/supported. 3002 */ 3003 switch (bw) { 3004 case IEEE80211_VHT_CHANWIDTH_USE_HT: 3005 case IEEE80211_VHT_CHANWIDTH_80MHZ: 3006 if ((supp_width == 1 || supp_width == 2) && 3007 ext_nss_bw == 3) 3008 return 2 * max_vht_nss; 3009 break; 3010 case IEEE80211_VHT_CHANWIDTH_160MHZ: 3011 if (supp_width == 0 && 3012 (ext_nss_bw == 1 || ext_nss_bw == 2)) 3013 return max_vht_nss / 2; 3014 if (supp_width == 0 && 3015 ext_nss_bw == 3) 3016 return (3 * max_vht_nss) / 4; 3017 if (supp_width == 1 && 3018 ext_nss_bw == 3) 3019 return 2 * max_vht_nss; 3020 break; 3021 case IEEE80211_VHT_CHANWIDTH_80P80MHZ: 3022 if (supp_width == 0 && ext_nss_bw == 1) 3023 return 0; /* not possible */ 3024 if (supp_width == 0 && 3025 ext_nss_bw == 2) 3026 return max_vht_nss / 2; 3027 if (supp_width == 0 && 3028 ext_nss_bw == 3) 3029 return (3 * max_vht_nss) / 4; 3030 if (supp_width == 1 && 3031 ext_nss_bw == 0) 3032 return 0; /* not possible */ 3033 if (supp_width == 1 && 3034 ext_nss_bw == 1) 3035 return max_vht_nss / 2; 3036 if (supp_width == 1 && 3037 ext_nss_bw == 2) 3038 return (3 * max_vht_nss) / 4; 3039 break; 3040 } 3041 3042 /* not covered or invalid combination received */ 3043 return max_vht_nss; 3044 } 3045 EXPORT_SYMBOL(ieee80211_get_vht_max_nss); 3046 3047 bool cfg80211_iftype_allowed(struct wiphy *wiphy, enum nl80211_iftype iftype, 3048 bool is_4addr, u8 check_swif) 3049 3050 { 3051 bool is_vlan = iftype == NL80211_IFTYPE_AP_VLAN; 3052 3053 switch (check_swif) { 3054 case 0: 3055 if (is_vlan && is_4addr) 3056 return wiphy->flags & WIPHY_FLAG_4ADDR_AP; 3057 return wiphy->interface_modes & BIT(iftype); 3058 case 1: 3059 if (!(wiphy->software_iftypes & BIT(iftype)) && is_vlan) 3060 return wiphy->flags & WIPHY_FLAG_4ADDR_AP; 3061 return wiphy->software_iftypes & BIT(iftype); 3062 default: 3063 break; 3064 } 3065 3066 return false; 3067 } 3068 EXPORT_SYMBOL(cfg80211_iftype_allowed); 3069 3070 void cfg80211_remove_link(struct wireless_dev *wdev, unsigned int link_id) 3071 { 3072 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 3073 3074 lockdep_assert_wiphy(wdev->wiphy); 3075 3076 switch (wdev->iftype) { 3077 case NL80211_IFTYPE_AP: 3078 case NL80211_IFTYPE_P2P_GO: 3079 cfg80211_stop_ap(rdev, wdev->netdev, link_id, true); 3080 break; 3081 default: 3082 /* per-link not relevant */ 3083 break; 3084 } 3085 3086 rdev_del_intf_link(rdev, wdev, link_id); 3087 3088 wdev->valid_links &= ~BIT(link_id); 3089 eth_zero_addr(wdev->links[link_id].addr); 3090 } 3091 3092 void cfg80211_remove_links(struct wireless_dev *wdev) 3093 { 3094 unsigned int link_id; 3095 3096 /* 3097 * links are controlled by upper layers (userspace/cfg) 3098 * only for AP mode, so only remove them here for AP 3099 */ 3100 if (wdev->iftype != NL80211_IFTYPE_AP) 3101 return; 3102 3103 if (wdev->valid_links) { 3104 for_each_valid_link(wdev, link_id) 3105 cfg80211_remove_link(wdev, link_id); 3106 } 3107 } 3108 3109 int cfg80211_remove_virtual_intf(struct cfg80211_registered_device *rdev, 3110 struct wireless_dev *wdev) 3111 { 3112 cfg80211_remove_links(wdev); 3113 3114 return rdev_del_virtual_intf(rdev, wdev); 3115 } 3116 3117 const struct wiphy_iftype_ext_capab * 3118 cfg80211_get_iftype_ext_capa(struct wiphy *wiphy, enum nl80211_iftype type) 3119 { 3120 int i; 3121 3122 for (i = 0; i < wiphy->num_iftype_ext_capab; i++) { 3123 if (wiphy->iftype_ext_capab[i].iftype == type) 3124 return &wiphy->iftype_ext_capab[i]; 3125 } 3126 3127 return NULL; 3128 } 3129 EXPORT_SYMBOL(cfg80211_get_iftype_ext_capa); 3130 3131 bool ieee80211_radio_freq_range_valid(const struct wiphy_radio *radio, 3132 u32 freq, u32 width) 3133 { 3134 const struct wiphy_radio_freq_range *r; 3135 int i; 3136 3137 for (i = 0; i < radio->n_freq_range; i++) { 3138 r = &radio->freq_range[i]; 3139 if (freq - width / 2 >= r->start_freq && 3140 freq + width / 2 <= r->end_freq) 3141 return true; 3142 } 3143 3144 return false; 3145 } 3146 EXPORT_SYMBOL(ieee80211_radio_freq_range_valid); 3147 3148 bool cfg80211_radio_chandef_valid(const struct wiphy_radio *radio, 3149 const struct cfg80211_chan_def *chandef) 3150 { 3151 u32 freq, width; 3152 3153 freq = ieee80211_chandef_to_khz(chandef); 3154 width = MHZ_TO_KHZ(cfg80211_chandef_get_width(chandef)); 3155 if (!ieee80211_radio_freq_range_valid(radio, freq, width)) 3156 return false; 3157 3158 freq = MHZ_TO_KHZ(chandef->center_freq2); 3159 if (freq && !ieee80211_radio_freq_range_valid(radio, freq, width)) 3160 return false; 3161 3162 return true; 3163 } 3164 EXPORT_SYMBOL(cfg80211_radio_chandef_valid); 3165 3166 bool cfg80211_wdev_channel_allowed(struct wireless_dev *wdev, 3167 struct ieee80211_channel *chan) 3168 { 3169 struct wiphy *wiphy = wdev->wiphy; 3170 const struct wiphy_radio *radio; 3171 struct cfg80211_chan_def chandef; 3172 u32 radio_mask; 3173 int i; 3174 3175 radio_mask = wdev->radio_mask; 3176 if (!wiphy->n_radio || radio_mask == BIT(wiphy->n_radio) - 1) 3177 return true; 3178 3179 cfg80211_chandef_create(&chandef, chan, NL80211_CHAN_HT20); 3180 for (i = 0; i < wiphy->n_radio; i++) { 3181 if (!(radio_mask & BIT(i))) 3182 continue; 3183 3184 radio = &wiphy->radio[i]; 3185 if (!cfg80211_radio_chandef_valid(radio, &chandef)) 3186 continue; 3187 3188 return true; 3189 } 3190 3191 return false; 3192 } 3193 EXPORT_SYMBOL(cfg80211_wdev_channel_allowed); 3194