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_valid_key_idx(struct wireless_dev *wdev, 262 int key_idx, bool pairwise, 263 const u8 *mac_addr) 264 { 265 if (WARN_ON(!wdev)) 266 return false; 267 268 if (key_idx < 0) 269 return false; 270 271 /* 272 * Can't differentiate ciphers here so allow 0..3. 273 * Pairwise keys must be for a station (MAC address given). 274 */ 275 if (pairwise) { 276 if (!mac_addr) 277 return false; 278 279 return key_idx < 4; 280 } 281 282 /* 283 * For group keys, mac_addr==NULL means setting a group key 284 * for TX, which is only supported on some interface types, 285 * except for STATION/P2P_CLIENT, where it's setting the RX 286 * key with the current AP (for legacy reasons.) 287 * 288 * Apart from that exception, a non-NULL mac_addr means RX 289 * key being set. 290 */ 291 292 switch (wdev->iftype) { 293 case NL80211_IFTYPE_ADHOC: 294 if (!(wdev->wiphy->flags & WIPHY_FLAG_IBSS_RSN)) 295 return false; 296 fallthrough; 297 case NL80211_IFTYPE_MESH_POINT: 298 /* no support for IGTK/BIGTK (yet?) */ 299 return key_idx < 4; 300 case NL80211_IFTYPE_NAN_DATA: 301 /* these always need to support per-STA GTK */ 302 return key_idx < 4; 303 case NL80211_IFTYPE_NAN: 304 /* no data */ 305 if (key_idx < 4) 306 return false; 307 /* NAN reused this flag */ 308 if (wiphy_ext_feature_isset(wdev->wiphy, 309 NL80211_EXT_FEATURE_BEACON_PROTECTION)) 310 return key_idx <= 7; 311 return key_idx <= 5; 312 case NL80211_IFTYPE_STATION: 313 case NL80211_IFTYPE_P2P_CLIENT: 314 /* see note about exception above */ 315 if (mac_addr) 316 return false; 317 /* BIGTK support implies IGTK support */ 318 if (wiphy_ext_feature_isset(wdev->wiphy, 319 NL80211_EXT_FEATURE_BEACON_PROTECTION_CLIENT)) 320 return key_idx <= 7; 321 fallthrough; 322 case NL80211_IFTYPE_AP: 323 case NL80211_IFTYPE_P2P_GO: 324 /* no RX with [B]IGTK */ 325 if (mac_addr) 326 return false; 327 if (wiphy_ext_feature_isset(wdev->wiphy, 328 NL80211_EXT_FEATURE_BEACON_PROTECTION)) 329 return key_idx <= 7; 330 fallthrough; 331 case NL80211_IFTYPE_AP_VLAN: 332 /* no RX with GTK */ 333 if (mac_addr) 334 return false; 335 if (cfg80211_igtk_cipher_supported(wdev->wiphy)) 336 return key_idx <= 5; 337 return key_idx <= 3; 338 default: 339 return false; 340 } 341 } 342 343 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, 344 struct wireless_dev *wdev, 345 struct key_params *params, int key_idx, 346 bool pairwise, const u8 *mac_addr) 347 { 348 if (!cfg80211_valid_key_idx(wdev, key_idx, pairwise, mac_addr)) 349 return -EINVAL; 350 351 switch (params->cipher) { 352 case WLAN_CIPHER_SUITE_TKIP: 353 /* Extended Key ID can only be used with CCMP/GCMP ciphers */ 354 if ((pairwise && key_idx) || 355 params->mode != NL80211_KEY_RX_TX) 356 return -EINVAL; 357 break; 358 case WLAN_CIPHER_SUITE_CCMP: 359 case WLAN_CIPHER_SUITE_CCMP_256: 360 case WLAN_CIPHER_SUITE_GCMP: 361 case WLAN_CIPHER_SUITE_GCMP_256: 362 /* IEEE802.11-2016 allows only 0 and - when supporting 363 * Extended Key ID - 1 as index for pairwise keys. 364 * @NL80211_KEY_NO_TX is only allowed for pairwise keys when 365 * the driver supports Extended Key ID. 366 * @NL80211_KEY_SET_TX can't be set when installing and 367 * validating a key. 368 */ 369 if ((params->mode == NL80211_KEY_NO_TX && !pairwise) || 370 params->mode == NL80211_KEY_SET_TX) 371 return -EINVAL; 372 if (wiphy_ext_feature_isset(&rdev->wiphy, 373 NL80211_EXT_FEATURE_EXT_KEY_ID)) { 374 if (pairwise && (key_idx < 0 || key_idx > 1)) 375 return -EINVAL; 376 } else if (pairwise && key_idx) { 377 return -EINVAL; 378 } 379 break; 380 case WLAN_CIPHER_SUITE_AES_CMAC: 381 case WLAN_CIPHER_SUITE_BIP_CMAC_256: 382 case WLAN_CIPHER_SUITE_BIP_GMAC_128: 383 case WLAN_CIPHER_SUITE_BIP_GMAC_256: 384 /* Disallow BIP (group-only) cipher as pairwise cipher */ 385 if (pairwise) 386 return -EINVAL; 387 if (key_idx < 4) 388 return -EINVAL; 389 break; 390 case WLAN_CIPHER_SUITE_WEP40: 391 case WLAN_CIPHER_SUITE_WEP104: 392 if (key_idx > 3) 393 return -EINVAL; 394 break; 395 default: 396 break; 397 } 398 399 /* 400 * Per Wi-Fi Aware v4.0 section 7.1.2, NAN Data interfaces 401 * shall only use CCMP-128 or GCMP-256. 402 */ 403 if (wdev->iftype == NL80211_IFTYPE_NAN_DATA && 404 params->cipher != WLAN_CIPHER_SUITE_CCMP && 405 params->cipher != WLAN_CIPHER_SUITE_GCMP_256) 406 return -EINVAL; 407 408 switch (params->cipher) { 409 case WLAN_CIPHER_SUITE_WEP40: 410 if (params->key_len != WLAN_KEY_LEN_WEP40) 411 return -EINVAL; 412 break; 413 case WLAN_CIPHER_SUITE_TKIP: 414 if (params->key_len != WLAN_KEY_LEN_TKIP) 415 return -EINVAL; 416 break; 417 case WLAN_CIPHER_SUITE_CCMP: 418 if (params->key_len != WLAN_KEY_LEN_CCMP) 419 return -EINVAL; 420 break; 421 case WLAN_CIPHER_SUITE_CCMP_256: 422 if (params->key_len != WLAN_KEY_LEN_CCMP_256) 423 return -EINVAL; 424 break; 425 case WLAN_CIPHER_SUITE_GCMP: 426 if (params->key_len != WLAN_KEY_LEN_GCMP) 427 return -EINVAL; 428 break; 429 case WLAN_CIPHER_SUITE_GCMP_256: 430 if (params->key_len != WLAN_KEY_LEN_GCMP_256) 431 return -EINVAL; 432 break; 433 case WLAN_CIPHER_SUITE_WEP104: 434 if (params->key_len != WLAN_KEY_LEN_WEP104) 435 return -EINVAL; 436 break; 437 case WLAN_CIPHER_SUITE_AES_CMAC: 438 if (params->key_len != WLAN_KEY_LEN_AES_CMAC) 439 return -EINVAL; 440 break; 441 case WLAN_CIPHER_SUITE_BIP_CMAC_256: 442 if (params->key_len != WLAN_KEY_LEN_BIP_CMAC_256) 443 return -EINVAL; 444 break; 445 case WLAN_CIPHER_SUITE_BIP_GMAC_128: 446 if (params->key_len != WLAN_KEY_LEN_BIP_GMAC_128) 447 return -EINVAL; 448 break; 449 case WLAN_CIPHER_SUITE_BIP_GMAC_256: 450 if (params->key_len != WLAN_KEY_LEN_BIP_GMAC_256) 451 return -EINVAL; 452 break; 453 default: 454 /* 455 * We don't know anything about this algorithm, 456 * allow using it -- but the driver must check 457 * all parameters! We still check below whether 458 * or not the driver supports this algorithm, 459 * of course. 460 */ 461 break; 462 } 463 464 if (params->seq) { 465 switch (params->cipher) { 466 case WLAN_CIPHER_SUITE_WEP40: 467 case WLAN_CIPHER_SUITE_WEP104: 468 /* These ciphers do not use key sequence */ 469 return -EINVAL; 470 case WLAN_CIPHER_SUITE_TKIP: 471 case WLAN_CIPHER_SUITE_CCMP: 472 case WLAN_CIPHER_SUITE_CCMP_256: 473 case WLAN_CIPHER_SUITE_GCMP: 474 case WLAN_CIPHER_SUITE_GCMP_256: 475 case WLAN_CIPHER_SUITE_AES_CMAC: 476 case WLAN_CIPHER_SUITE_BIP_CMAC_256: 477 case WLAN_CIPHER_SUITE_BIP_GMAC_128: 478 case WLAN_CIPHER_SUITE_BIP_GMAC_256: 479 if (params->seq_len != 6) 480 return -EINVAL; 481 break; 482 } 483 } 484 485 if (!cfg80211_supported_cipher_suite(&rdev->wiphy, params->cipher)) 486 return -EINVAL; 487 488 if (params->ltf_keyseed) { 489 if (!wiphy_ext_feature_isset(&rdev->wiphy, 490 NL80211_EXT_FEATURE_SECURE_LTF) || 491 !wiphy_ext_feature_isset(&rdev->wiphy, 492 NL80211_EXT_FEATURE_SET_KEY_LTF_SEED)) 493 return -EOPNOTSUPP; 494 495 /* 496 * LTF key seed is pairwise key material and must only be 497 * used with a pairwise key 498 */ 499 if (!pairwise) 500 return -EINVAL; 501 } 502 503 return 0; 504 } 505 506 unsigned int __attribute_const__ ieee80211_hdrlen(__le16 fc) 507 { 508 unsigned int hdrlen = 24; 509 510 if (ieee80211_is_ext(fc)) { 511 hdrlen = 4; 512 goto out; 513 } 514 515 if (ieee80211_is_data(fc)) { 516 if (ieee80211_has_a4(fc)) 517 hdrlen = 30; 518 if (ieee80211_is_data_qos(fc)) { 519 hdrlen += IEEE80211_QOS_CTL_LEN; 520 if (ieee80211_has_order(fc)) 521 hdrlen += IEEE80211_HT_CTL_LEN; 522 } 523 goto out; 524 } 525 526 if (ieee80211_is_mgmt(fc)) { 527 if (ieee80211_has_order(fc)) 528 hdrlen += IEEE80211_HT_CTL_LEN; 529 goto out; 530 } 531 532 if (ieee80211_is_ctl(fc)) { 533 /* 534 * ACK and CTS are 10 bytes, all others 16. To see how 535 * to get this condition consider 536 * subtype mask: 0b0000000011110000 (0x00F0) 537 * ACK subtype: 0b0000000011010000 (0x00D0) 538 * CTS subtype: 0b0000000011000000 (0x00C0) 539 * bits that matter: ^^^ (0x00E0) 540 * value of those: 0b0000000011000000 (0x00C0) 541 */ 542 if ((fc & cpu_to_le16(0x00E0)) == cpu_to_le16(0x00C0)) 543 hdrlen = 10; 544 else 545 hdrlen = 16; 546 } 547 out: 548 return hdrlen; 549 } 550 EXPORT_SYMBOL(ieee80211_hdrlen); 551 552 unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb) 553 { 554 const struct ieee80211_hdr *hdr = 555 (const struct ieee80211_hdr *)skb->data; 556 unsigned int hdrlen; 557 558 if (unlikely(skb->len < 10)) 559 return 0; 560 hdrlen = ieee80211_hdrlen(hdr->frame_control); 561 if (unlikely(hdrlen > skb->len)) 562 return 0; 563 return hdrlen; 564 } 565 EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb); 566 567 static unsigned int __ieee80211_get_mesh_hdrlen(u8 flags) 568 { 569 int ae = flags & MESH_FLAGS_AE; 570 /* 802.11-2012, 8.2.4.7.3 */ 571 switch (ae) { 572 default: 573 case 0: 574 return 6; 575 case MESH_FLAGS_AE_A4: 576 return 12; 577 case MESH_FLAGS_AE_A5_A6: 578 return 18; 579 } 580 } 581 582 unsigned int ieee80211_get_mesh_hdrlen(struct ieee80211s_hdr *meshhdr) 583 { 584 return __ieee80211_get_mesh_hdrlen(meshhdr->flags); 585 } 586 EXPORT_SYMBOL(ieee80211_get_mesh_hdrlen); 587 588 bool ieee80211_get_8023_tunnel_proto(const void *hdr, __be16 *proto) 589 { 590 const __be16 *hdr_proto = hdr + ETH_ALEN; 591 592 if (!(ether_addr_equal(hdr, rfc1042_header) && 593 *hdr_proto != htons(ETH_P_AARP) && 594 *hdr_proto != htons(ETH_P_IPX)) && 595 !ether_addr_equal(hdr, bridge_tunnel_header)) 596 return false; 597 598 *proto = *hdr_proto; 599 600 return true; 601 } 602 EXPORT_SYMBOL(ieee80211_get_8023_tunnel_proto); 603 604 int ieee80211_strip_8023_mesh_hdr(struct sk_buff *skb) 605 { 606 const void *mesh_addr; 607 struct { 608 struct ethhdr eth; 609 u8 flags; 610 } payload; 611 int hdrlen; 612 int ret; 613 614 ret = skb_copy_bits(skb, 0, &payload, sizeof(payload)); 615 if (ret) 616 return ret; 617 618 hdrlen = sizeof(payload.eth) + __ieee80211_get_mesh_hdrlen(payload.flags); 619 620 if (likely(pskb_may_pull(skb, hdrlen + 8) && 621 ieee80211_get_8023_tunnel_proto(skb->data + hdrlen, 622 &payload.eth.h_proto))) 623 hdrlen += ETH_ALEN + 2; 624 else if (!pskb_may_pull(skb, hdrlen)) 625 return -EINVAL; 626 else 627 payload.eth.h_proto = htons(skb->len - hdrlen); 628 629 mesh_addr = skb->data + sizeof(payload.eth) + ETH_ALEN; 630 switch (payload.flags & MESH_FLAGS_AE) { 631 case MESH_FLAGS_AE_A4: 632 memcpy(&payload.eth.h_source, mesh_addr, ETH_ALEN); 633 break; 634 case MESH_FLAGS_AE_A5_A6: 635 memcpy(&payload.eth, mesh_addr, 2 * ETH_ALEN); 636 break; 637 default: 638 break; 639 } 640 641 pskb_pull(skb, hdrlen - sizeof(payload.eth)); 642 memcpy(skb->data, &payload.eth, sizeof(payload.eth)); 643 644 return 0; 645 } 646 EXPORT_SYMBOL(ieee80211_strip_8023_mesh_hdr); 647 648 int ieee80211_data_to_8023_exthdr(struct sk_buff *skb, struct ethhdr *ehdr, 649 const u8 *addr, enum nl80211_iftype iftype, 650 u8 data_offset, bool is_amsdu) 651 { 652 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; 653 struct { 654 u8 hdr[ETH_ALEN] __aligned(2); 655 __be16 proto; 656 } payload; 657 struct ethhdr tmp; 658 u16 hdrlen; 659 660 if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) 661 return -1; 662 663 hdrlen = ieee80211_hdrlen(hdr->frame_control) + data_offset; 664 if (skb->len < hdrlen) 665 return -1; 666 667 /* convert IEEE 802.11 header + possible LLC headers into Ethernet 668 * header 669 * IEEE 802.11 address fields: 670 * ToDS FromDS Addr1 Addr2 Addr3 Addr4 671 * 0 0 DA SA BSSID n/a 672 * 0 1 DA BSSID SA n/a 673 * 1 0 BSSID SA DA n/a 674 * 1 1 RA TA DA SA 675 */ 676 memcpy(tmp.h_dest, ieee80211_get_DA(hdr), ETH_ALEN); 677 memcpy(tmp.h_source, ieee80211_get_SA(hdr), ETH_ALEN); 678 679 switch (hdr->frame_control & 680 cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) { 681 case cpu_to_le16(IEEE80211_FCTL_TODS): 682 if (unlikely(iftype != NL80211_IFTYPE_AP && 683 iftype != NL80211_IFTYPE_AP_VLAN && 684 iftype != NL80211_IFTYPE_P2P_GO)) 685 return -1; 686 break; 687 case cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS): 688 if (unlikely(iftype != NL80211_IFTYPE_MESH_POINT && 689 iftype != NL80211_IFTYPE_AP_VLAN && 690 iftype != NL80211_IFTYPE_STATION)) 691 return -1; 692 break; 693 case cpu_to_le16(IEEE80211_FCTL_FROMDS): 694 if ((iftype != NL80211_IFTYPE_STATION && 695 iftype != NL80211_IFTYPE_P2P_CLIENT && 696 iftype != NL80211_IFTYPE_MESH_POINT) || 697 (is_multicast_ether_addr(tmp.h_dest) && 698 ether_addr_equal(tmp.h_source, addr))) 699 return -1; 700 break; 701 case cpu_to_le16(0): 702 if (iftype != NL80211_IFTYPE_ADHOC && 703 iftype != NL80211_IFTYPE_STATION && 704 iftype != NL80211_IFTYPE_OCB && 705 iftype != NL80211_IFTYPE_NAN_DATA) 706 return -1; 707 break; 708 } 709 710 if (likely(!is_amsdu && iftype != NL80211_IFTYPE_MESH_POINT && 711 skb_copy_bits(skb, hdrlen, &payload, sizeof(payload)) == 0 && 712 ieee80211_get_8023_tunnel_proto(&payload, &tmp.h_proto))) { 713 /* remove RFC1042 or Bridge-Tunnel encapsulation */ 714 hdrlen += ETH_ALEN + 2; 715 skb_postpull_rcsum(skb, &payload, ETH_ALEN + 2); 716 } else { 717 tmp.h_proto = htons(skb->len - hdrlen); 718 } 719 720 pskb_pull(skb, hdrlen); 721 722 if (!ehdr) 723 ehdr = skb_push(skb, sizeof(struct ethhdr)); 724 memcpy(ehdr, &tmp, sizeof(tmp)); 725 726 return 0; 727 } 728 EXPORT_SYMBOL(ieee80211_data_to_8023_exthdr); 729 730 static void 731 __frame_add_frag(struct sk_buff *skb, struct page *page, 732 void *ptr, int len, int size) 733 { 734 struct skb_shared_info *sh = skb_shinfo(skb); 735 int page_offset; 736 737 get_page(page); 738 page_offset = ptr - page_address(page); 739 skb_add_rx_frag(skb, sh->nr_frags, page, page_offset, len, size); 740 } 741 742 static void 743 __ieee80211_amsdu_copy_frag(struct sk_buff *skb, struct sk_buff *frame, 744 int offset, int len) 745 { 746 struct skb_shared_info *sh = skb_shinfo(skb); 747 const skb_frag_t *frag = &sh->frags[0]; 748 struct page *frag_page; 749 void *frag_ptr; 750 int frag_len, frag_size; 751 int head_size = skb->len - skb->data_len; 752 int cur_len; 753 754 frag_page = virt_to_head_page(skb->head); 755 frag_ptr = skb->data; 756 frag_size = head_size; 757 758 while (offset >= frag_size) { 759 offset -= frag_size; 760 frag_page = skb_frag_page(frag); 761 frag_ptr = skb_frag_address(frag); 762 frag_size = skb_frag_size(frag); 763 frag++; 764 } 765 766 frag_ptr += offset; 767 frag_len = frag_size - offset; 768 769 cur_len = min(len, frag_len); 770 771 __frame_add_frag(frame, frag_page, frag_ptr, cur_len, frag_size); 772 len -= cur_len; 773 774 while (len > 0) { 775 frag_len = skb_frag_size(frag); 776 cur_len = min(len, frag_len); 777 __frame_add_frag(frame, skb_frag_page(frag), 778 skb_frag_address(frag), cur_len, frag_len); 779 len -= cur_len; 780 frag++; 781 } 782 } 783 784 static struct sk_buff * 785 __ieee80211_amsdu_copy(struct sk_buff *skb, unsigned int hlen, 786 int offset, int len, bool reuse_frag, 787 int min_len) 788 { 789 struct sk_buff *frame; 790 int cur_len = len; 791 792 if (skb->len - offset < len) 793 return NULL; 794 795 /* 796 * When reusing fragments, copy some data to the head to simplify 797 * ethernet header handling and speed up protocol header processing 798 * in the stack later. 799 */ 800 if (reuse_frag) 801 cur_len = min_t(int, len, min_len); 802 803 /* 804 * Allocate and reserve two bytes more for payload 805 * alignment since sizeof(struct ethhdr) is 14. 806 */ 807 frame = dev_alloc_skb(hlen + sizeof(struct ethhdr) + 2 + cur_len); 808 if (!frame) 809 return NULL; 810 811 frame->priority = skb->priority; 812 skb_reserve(frame, hlen + sizeof(struct ethhdr) + 2); 813 skb_copy_bits(skb, offset, skb_put(frame, cur_len), cur_len); 814 815 len -= cur_len; 816 if (!len) 817 return frame; 818 819 offset += cur_len; 820 __ieee80211_amsdu_copy_frag(skb, frame, offset, len); 821 822 return frame; 823 } 824 825 static u16 826 ieee80211_amsdu_subframe_length(void *field, u8 mesh_flags, u8 hdr_type) 827 { 828 __le16 *field_le = field; 829 __be16 *field_be = field; 830 u16 len; 831 832 if (hdr_type >= 2) 833 len = le16_to_cpu(*field_le); 834 else 835 len = be16_to_cpu(*field_be); 836 if (hdr_type) 837 len += __ieee80211_get_mesh_hdrlen(mesh_flags); 838 839 return len; 840 } 841 842 bool ieee80211_is_valid_amsdu(struct sk_buff *skb, u8 mesh_hdr) 843 { 844 int offset = 0, subframe_len, padding; 845 846 for (offset = 0; offset < skb->len; offset += subframe_len + padding) { 847 int remaining = skb->len - offset; 848 struct { 849 __be16 len; 850 u8 mesh_flags; 851 } hdr; 852 u16 len; 853 854 if (sizeof(hdr) > remaining) 855 return false; 856 857 if (skb_copy_bits(skb, offset + 2 * ETH_ALEN, &hdr, sizeof(hdr)) < 0) 858 return false; 859 860 len = ieee80211_amsdu_subframe_length(&hdr.len, hdr.mesh_flags, 861 mesh_hdr); 862 subframe_len = sizeof(struct ethhdr) + len; 863 padding = (4 - subframe_len) & 0x3; 864 865 if (subframe_len > remaining) 866 return false; 867 } 868 869 return true; 870 } 871 EXPORT_SYMBOL(ieee80211_is_valid_amsdu); 872 873 874 /* 875 * Detects if an MSDU frame was maliciously converted into an A-MSDU 876 * frame by an adversary. This is done by parsing the received frame 877 * as if it were a regular MSDU, even though the A-MSDU flag is set. 878 * 879 * For non-mesh interfaces, detection involves checking whether the 880 * payload, when interpreted as an MSDU, begins with a valid RFC1042 881 * header. This is done by comparing the A-MSDU subheader's destination 882 * address to the start of the RFC1042 header. 883 * 884 * For mesh interfaces, the MSDU includes a 6-byte Mesh Control field 885 * and an optional variable-length Mesh Address Extension field before 886 * the RFC1042 header. The position of the RFC1042 header must therefore 887 * be calculated based on the mesh header length. 888 * 889 * Since this function intentionally parses an A-MSDU frame as an MSDU, 890 * it only assumes that the A-MSDU subframe header is present, and 891 * beyond this it performs its own bounds checks under the assumption 892 * that the frame is instead parsed as a non-aggregated MSDU. 893 */ 894 static bool 895 is_amsdu_aggregation_attack(struct ethhdr *eth, struct sk_buff *skb, 896 enum nl80211_iftype iftype) 897 { 898 int offset; 899 900 /* Non-mesh case can be directly compared */ 901 if (iftype != NL80211_IFTYPE_MESH_POINT) 902 return ether_addr_equal(eth->h_dest, rfc1042_header); 903 904 offset = __ieee80211_get_mesh_hdrlen(eth->h_dest[0]); 905 if (offset == 6) { 906 /* Mesh case with empty address extension field */ 907 return ether_addr_equal(eth->h_source, rfc1042_header); 908 } else if (offset + ETH_ALEN <= skb->len) { 909 /* Mesh case with non-empty address extension field */ 910 u8 temp[ETH_ALEN]; 911 912 skb_copy_bits(skb, offset, temp, ETH_ALEN); 913 return ether_addr_equal(temp, rfc1042_header); 914 } 915 916 return false; 917 } 918 919 void ieee80211_amsdu_to_8023s(struct sk_buff *skb, struct sk_buff_head *list, 920 const u8 *addr, enum nl80211_iftype iftype, 921 const unsigned int extra_headroom, 922 const u8 *check_da, const u8 *check_sa, 923 u8 mesh_control) 924 { 925 unsigned int hlen = ALIGN(extra_headroom, 4); 926 struct sk_buff *frame = NULL; 927 int offset = 0; 928 struct { 929 struct ethhdr eth; 930 uint8_t flags; 931 } hdr; 932 bool reuse_frag = skb->head_frag && !skb_has_frag_list(skb); 933 bool reuse_skb = false; 934 bool last = false; 935 int copy_len = sizeof(hdr.eth); 936 937 if (iftype == NL80211_IFTYPE_MESH_POINT) 938 copy_len = sizeof(hdr); 939 940 while (!last) { 941 int remaining = skb->len - offset; 942 unsigned int subframe_len; 943 int len, mesh_len = 0; 944 u8 padding; 945 946 if (copy_len > remaining) 947 goto purge; 948 949 skb_copy_bits(skb, offset, &hdr, copy_len); 950 if (iftype == NL80211_IFTYPE_MESH_POINT) 951 mesh_len = __ieee80211_get_mesh_hdrlen(hdr.flags); 952 len = ieee80211_amsdu_subframe_length(&hdr.eth.h_proto, hdr.flags, 953 mesh_control); 954 subframe_len = sizeof(struct ethhdr) + len; 955 padding = (4 - subframe_len) & 0x3; 956 957 /* the last MSDU has no padding */ 958 if (subframe_len > remaining) 959 goto purge; 960 /* mitigate A-MSDU aggregation injection attacks, to be 961 * checked when processing first subframe (offset == 0). 962 */ 963 if (offset == 0 && is_amsdu_aggregation_attack(&hdr.eth, skb, iftype)) 964 goto purge; 965 966 offset += sizeof(struct ethhdr); 967 last = remaining <= subframe_len + padding; 968 969 /* FIXME: should we really accept multicast DA? */ 970 if ((check_da && !is_multicast_ether_addr(hdr.eth.h_dest) && 971 !ether_addr_equal(check_da, hdr.eth.h_dest)) || 972 (check_sa && !ether_addr_equal(check_sa, hdr.eth.h_source))) { 973 offset += len + padding; 974 continue; 975 } 976 977 /* reuse skb for the last subframe */ 978 if (!skb_is_nonlinear(skb) && !reuse_frag && last) { 979 skb_pull(skb, offset); 980 frame = skb; 981 reuse_skb = true; 982 } else { 983 frame = __ieee80211_amsdu_copy(skb, hlen, offset, len, 984 reuse_frag, 32 + mesh_len); 985 if (!frame) 986 goto purge; 987 988 offset += len + padding; 989 } 990 991 skb_reset_network_header(frame); 992 frame->dev = skb->dev; 993 frame->priority = skb->priority; 994 995 if (likely(iftype != NL80211_IFTYPE_MESH_POINT && 996 ieee80211_get_8023_tunnel_proto(frame->data, &hdr.eth.h_proto))) 997 skb_pull(frame, ETH_ALEN + 2); 998 999 memcpy(skb_push(frame, sizeof(hdr.eth)), &hdr.eth, sizeof(hdr.eth)); 1000 __skb_queue_tail(list, frame); 1001 } 1002 1003 if (!reuse_skb) 1004 dev_kfree_skb(skb); 1005 1006 return; 1007 1008 purge: 1009 __skb_queue_purge(list); 1010 dev_kfree_skb(skb); 1011 } 1012 EXPORT_SYMBOL(ieee80211_amsdu_to_8023s); 1013 1014 /* Given a data frame determine the 802.1p/1d tag to use. */ 1015 unsigned int cfg80211_classify8021d(struct sk_buff *skb, 1016 struct cfg80211_qos_map *qos_map) 1017 { 1018 unsigned int dscp; 1019 unsigned char vlan_priority; 1020 unsigned int ret; 1021 1022 /* skb->priority values from 256->263 are magic values to 1023 * directly indicate a specific 802.1d priority. This is used 1024 * to allow 802.1d priority to be passed directly in from VLAN 1025 * tags, etc. 1026 */ 1027 if (skb->priority >= 256 && skb->priority <= 263) { 1028 ret = skb->priority - 256; 1029 goto out; 1030 } 1031 1032 if (skb_vlan_tag_present(skb)) { 1033 vlan_priority = (skb_vlan_tag_get(skb) & VLAN_PRIO_MASK) 1034 >> VLAN_PRIO_SHIFT; 1035 if (vlan_priority > 0) { 1036 ret = vlan_priority; 1037 goto out; 1038 } 1039 } 1040 1041 switch (skb->protocol) { 1042 case htons(ETH_P_IP): 1043 dscp = ipv4_get_dsfield(ip_hdr(skb)) & 0xfc; 1044 break; 1045 case htons(ETH_P_IPV6): 1046 dscp = ipv6_get_dsfield(ipv6_hdr(skb)) & 0xfc; 1047 break; 1048 case htons(ETH_P_MPLS_UC): 1049 case htons(ETH_P_MPLS_MC): { 1050 struct mpls_label mpls_tmp, *mpls; 1051 1052 mpls = skb_header_pointer(skb, sizeof(struct ethhdr), 1053 sizeof(*mpls), &mpls_tmp); 1054 if (!mpls) 1055 return 0; 1056 1057 ret = (ntohl(mpls->entry) & MPLS_LS_TC_MASK) 1058 >> MPLS_LS_TC_SHIFT; 1059 goto out; 1060 } 1061 case htons(ETH_P_80221): 1062 /* 802.21 is always network control traffic */ 1063 return 7; 1064 default: 1065 return 0; 1066 } 1067 1068 if (qos_map) { 1069 unsigned int i, tmp_dscp = dscp >> 2; 1070 1071 for (i = 0; i < qos_map->num_des; i++) { 1072 if (tmp_dscp == qos_map->dscp_exception[i].dscp) { 1073 ret = qos_map->dscp_exception[i].up; 1074 goto out; 1075 } 1076 } 1077 1078 for (i = 0; i < 8; i++) { 1079 if (tmp_dscp >= qos_map->up[i].low && 1080 tmp_dscp <= qos_map->up[i].high) { 1081 ret = i; 1082 goto out; 1083 } 1084 } 1085 } 1086 1087 /* The default mapping as defined Section 2.3 in RFC8325: The three 1088 * Most Significant Bits (MSBs) of the DSCP are used as the 1089 * corresponding L2 markings. 1090 */ 1091 ret = dscp >> 5; 1092 1093 /* Handle specific DSCP values for which the default mapping (as 1094 * described above) doesn't adhere to the intended usage of the DSCP 1095 * value. See section 4 in RFC8325. Specifically, for the following 1096 * Diffserv Service Classes no update is needed: 1097 * - Standard: DF 1098 * - Low Priority Data: CS1 1099 * - Multimedia Conferencing: AF41, AF42, AF43 1100 * - Network Control Traffic: CS7 1101 * - Real-Time Interactive: CS4 1102 * - Signaling: CS5 1103 */ 1104 switch (dscp >> 2) { 1105 case 10: 1106 case 12: 1107 case 14: 1108 /* High throughput data: AF11, AF12, AF13 */ 1109 ret = 0; 1110 break; 1111 case 16: 1112 /* Operations, Administration, and Maintenance and Provisioning: 1113 * CS2 1114 */ 1115 ret = 0; 1116 break; 1117 case 18: 1118 case 20: 1119 case 22: 1120 /* Low latency data: AF21, AF22, AF23 */ 1121 ret = 3; 1122 break; 1123 case 24: 1124 /* Broadcasting video: CS3 */ 1125 ret = 4; 1126 break; 1127 case 26: 1128 case 28: 1129 case 30: 1130 /* Multimedia Streaming: AF31, AF32, AF33 */ 1131 ret = 4; 1132 break; 1133 case 44: 1134 /* Voice Admit: VA */ 1135 ret = 6; 1136 break; 1137 case 46: 1138 /* Telephony traffic: EF */ 1139 ret = 6; 1140 break; 1141 case 48: 1142 /* Network Control Traffic: CS6 */ 1143 ret = 7; 1144 break; 1145 } 1146 out: 1147 return array_index_nospec(ret, IEEE80211_NUM_TIDS); 1148 } 1149 EXPORT_SYMBOL(cfg80211_classify8021d); 1150 1151 const struct element *ieee80211_bss_get_elem(struct cfg80211_bss *bss, u8 id) 1152 { 1153 const struct cfg80211_bss_ies *ies; 1154 1155 ies = rcu_dereference(bss->ies); 1156 if (!ies) 1157 return NULL; 1158 1159 return cfg80211_find_elem(id, ies->data, ies->len); 1160 } 1161 EXPORT_SYMBOL(ieee80211_bss_get_elem); 1162 1163 void cfg80211_upload_connect_keys(struct wireless_dev *wdev) 1164 { 1165 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1166 struct net_device *dev = wdev->netdev; 1167 int i; 1168 1169 if (!wdev->connect_keys) 1170 return; 1171 1172 for (i = 0; i < 4; i++) { 1173 if (!wdev->connect_keys->params[i].cipher) 1174 continue; 1175 if (rdev_add_key(rdev, wdev, -1, i, false, NULL, 1176 &wdev->connect_keys->params[i])) { 1177 netdev_err(dev, "failed to set key %d\n", i); 1178 continue; 1179 } 1180 if (wdev->connect_keys->def == i && 1181 rdev_set_default_key(rdev, dev, -1, i, true, true)) { 1182 netdev_err(dev, "failed to set defkey %d\n", i); 1183 continue; 1184 } 1185 } 1186 1187 kfree_sensitive(wdev->connect_keys); 1188 wdev->connect_keys = NULL; 1189 } 1190 1191 void cfg80211_process_wdev_events(struct wireless_dev *wdev) 1192 { 1193 struct cfg80211_event *ev; 1194 unsigned long flags; 1195 1196 spin_lock_irqsave(&wdev->event_lock, flags); 1197 while (!list_empty(&wdev->event_list)) { 1198 ev = list_first_entry(&wdev->event_list, 1199 struct cfg80211_event, list); 1200 list_del(&ev->list); 1201 spin_unlock_irqrestore(&wdev->event_lock, flags); 1202 1203 switch (ev->type) { 1204 case EVENT_CONNECT_RESULT: 1205 __cfg80211_connect_result( 1206 wdev->netdev, 1207 &ev->cr, 1208 ev->cr.status == WLAN_STATUS_SUCCESS); 1209 break; 1210 case EVENT_ROAMED: 1211 __cfg80211_roamed(wdev, &ev->rm); 1212 break; 1213 case EVENT_DISCONNECTED: 1214 __cfg80211_disconnected(wdev->netdev, 1215 ev->dc.ie, ev->dc.ie_len, 1216 ev->dc.reason, 1217 !ev->dc.locally_generated); 1218 break; 1219 case EVENT_IBSS_JOINED: 1220 __cfg80211_ibss_joined(wdev->netdev, ev->ij.bssid, 1221 ev->ij.channel); 1222 break; 1223 case EVENT_STOPPED: 1224 /* 1225 * for NAN interfaces cfg80211_leave must be called but 1226 * locking here doesn't allow this. 1227 */ 1228 if (WARN_ON(wdev->iftype == NL80211_IFTYPE_NAN)) 1229 break; 1230 1231 cfg80211_leave_locked(wiphy_to_rdev(wdev->wiphy), wdev, 1232 ev->link_id); 1233 break; 1234 case EVENT_PORT_AUTHORIZED: 1235 __cfg80211_port_authorized(wdev, ev->pa.peer_addr, 1236 ev->pa.td_bitmap, 1237 ev->pa.td_bitmap_len); 1238 break; 1239 } 1240 1241 kfree(ev); 1242 1243 spin_lock_irqsave(&wdev->event_lock, flags); 1244 } 1245 spin_unlock_irqrestore(&wdev->event_lock, flags); 1246 } 1247 1248 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev) 1249 { 1250 struct wireless_dev *wdev; 1251 1252 lockdep_assert_held(&rdev->wiphy.mtx); 1253 1254 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) 1255 cfg80211_process_wdev_events(wdev); 1256 } 1257 1258 int cfg80211_change_iface(struct cfg80211_registered_device *rdev, 1259 struct net_device *dev, enum nl80211_iftype ntype, 1260 struct vif_params *params) 1261 { 1262 int err; 1263 enum nl80211_iftype otype = dev->ieee80211_ptr->iftype; 1264 1265 lockdep_assert_held(&rdev->wiphy.mtx); 1266 1267 /* don't support changing VLANs, you just re-create them */ 1268 if (otype == NL80211_IFTYPE_AP_VLAN) 1269 return -EOPNOTSUPP; 1270 1271 /* 1272 * for NAN interfaces cfg80211_leave must be called for leaving, 1273 * but locking here doesn't allow this. 1274 */ 1275 if (otype == NL80211_IFTYPE_NAN) 1276 return -EOPNOTSUPP; 1277 1278 /* cannot change into P2P device or NAN */ 1279 if (ntype == NL80211_IFTYPE_P2P_DEVICE || 1280 ntype == NL80211_IFTYPE_NAN || 1281 ntype == NL80211_IFTYPE_PD) 1282 return -EOPNOTSUPP; 1283 1284 if (!rdev->ops->change_virtual_intf || 1285 !(rdev->wiphy.interface_modes & (1 << ntype))) 1286 return -EOPNOTSUPP; 1287 1288 if (ntype != otype) { 1289 /* if it's part of a bridge, reject changing type to station/ibss */ 1290 if (netif_is_bridge_port(dev) && 1291 (ntype == NL80211_IFTYPE_ADHOC || 1292 ntype == NL80211_IFTYPE_STATION || 1293 ntype == NL80211_IFTYPE_P2P_CLIENT)) 1294 return -EBUSY; 1295 1296 dev->ieee80211_ptr->use_4addr = false; 1297 rdev_set_qos_map(rdev, dev, NULL); 1298 1299 cfg80211_leave_locked(rdev, dev->ieee80211_ptr, -1); 1300 1301 cfg80211_process_rdev_events(rdev); 1302 cfg80211_mlme_purge_registrations(dev->ieee80211_ptr); 1303 1304 memset(&dev->ieee80211_ptr->u, 0, 1305 sizeof(dev->ieee80211_ptr->u)); 1306 memset(&dev->ieee80211_ptr->links, 0, 1307 sizeof(dev->ieee80211_ptr->links)); 1308 } 1309 1310 err = rdev_change_virtual_intf(rdev, dev, ntype, params); 1311 1312 WARN_ON(!err && dev->ieee80211_ptr->iftype != ntype); 1313 1314 if (!err && params && params->use_4addr != -1) 1315 dev->ieee80211_ptr->use_4addr = params->use_4addr; 1316 1317 if (!err) { 1318 dev->priv_flags &= ~IFF_DONT_BRIDGE; 1319 switch (ntype) { 1320 case NL80211_IFTYPE_STATION: 1321 if (dev->ieee80211_ptr->use_4addr) 1322 break; 1323 fallthrough; 1324 case NL80211_IFTYPE_OCB: 1325 case NL80211_IFTYPE_P2P_CLIENT: 1326 case NL80211_IFTYPE_ADHOC: 1327 case NL80211_IFTYPE_NAN_DATA: 1328 dev->priv_flags |= IFF_DONT_BRIDGE; 1329 break; 1330 case NL80211_IFTYPE_P2P_GO: 1331 case NL80211_IFTYPE_AP: 1332 case NL80211_IFTYPE_AP_VLAN: 1333 case NL80211_IFTYPE_MESH_POINT: 1334 /* bridging OK */ 1335 break; 1336 case NL80211_IFTYPE_MONITOR: 1337 /* monitor can't bridge anyway */ 1338 break; 1339 case NL80211_IFTYPE_UNSPECIFIED: 1340 case NUM_NL80211_IFTYPES: 1341 /* not happening */ 1342 break; 1343 case NL80211_IFTYPE_P2P_DEVICE: 1344 case NL80211_IFTYPE_WDS: 1345 case NL80211_IFTYPE_NAN: 1346 case NL80211_IFTYPE_PD: 1347 WARN_ON(1); 1348 break; 1349 } 1350 } 1351 1352 if (!err && ntype != otype && netif_running(dev)) { 1353 cfg80211_update_iface_num(rdev, ntype, 1); 1354 cfg80211_update_iface_num(rdev, otype, -1); 1355 } 1356 1357 return err; 1358 } 1359 1360 static u32 cfg80211_calculate_bitrate_ht(struct rate_info *rate) 1361 { 1362 int modulation, streams, bitrate; 1363 1364 /* the formula below does only work for MCS values smaller than 32 */ 1365 if (WARN_ON_ONCE(rate->mcs >= 32)) 1366 return 0; 1367 1368 modulation = rate->mcs & 7; 1369 streams = (rate->mcs >> 3) + 1; 1370 1371 bitrate = (rate->bw == RATE_INFO_BW_40) ? 13500000 : 6500000; 1372 1373 if (modulation < 4) 1374 bitrate *= (modulation + 1); 1375 else if (modulation == 4) 1376 bitrate *= (modulation + 2); 1377 else 1378 bitrate *= (modulation + 3); 1379 1380 bitrate *= streams; 1381 1382 if (rate->flags & RATE_INFO_FLAGS_SHORT_GI) 1383 bitrate = (bitrate / 9) * 10; 1384 1385 /* do NOT round down here */ 1386 return (bitrate + 50000) / 100000; 1387 } 1388 1389 static u32 cfg80211_calculate_bitrate_dmg(struct rate_info *rate) 1390 { 1391 static const u32 __mcs2bitrate[] = { 1392 /* control PHY */ 1393 [0] = 275, 1394 /* SC PHY */ 1395 [1] = 3850, 1396 [2] = 7700, 1397 [3] = 9625, 1398 [4] = 11550, 1399 [5] = 12512, /* 1251.25 mbps */ 1400 [6] = 15400, 1401 [7] = 19250, 1402 [8] = 23100, 1403 [9] = 25025, 1404 [10] = 30800, 1405 [11] = 38500, 1406 [12] = 46200, 1407 /* OFDM PHY */ 1408 [13] = 6930, 1409 [14] = 8662, /* 866.25 mbps */ 1410 [15] = 13860, 1411 [16] = 17325, 1412 [17] = 20790, 1413 [18] = 27720, 1414 [19] = 34650, 1415 [20] = 41580, 1416 [21] = 45045, 1417 [22] = 51975, 1418 [23] = 62370, 1419 [24] = 67568, /* 6756.75 mbps */ 1420 /* LP-SC PHY */ 1421 [25] = 6260, 1422 [26] = 8340, 1423 [27] = 11120, 1424 [28] = 12510, 1425 [29] = 16680, 1426 [30] = 22240, 1427 [31] = 25030, 1428 }; 1429 1430 if (WARN_ON_ONCE(rate->mcs >= ARRAY_SIZE(__mcs2bitrate))) 1431 return 0; 1432 1433 return __mcs2bitrate[rate->mcs]; 1434 } 1435 1436 static u32 cfg80211_calculate_bitrate_extended_sc_dmg(struct rate_info *rate) 1437 { 1438 static const u32 __mcs2bitrate[] = { 1439 [6 - 6] = 26950, /* MCS 9.1 : 2695.0 mbps */ 1440 [7 - 6] = 50050, /* MCS 12.1 */ 1441 [8 - 6] = 53900, 1442 [9 - 6] = 57750, 1443 [10 - 6] = 63900, 1444 [11 - 6] = 75075, 1445 [12 - 6] = 80850, 1446 }; 1447 1448 /* Extended SC MCS not defined for base MCS below 6 or above 12 */ 1449 if (WARN_ON_ONCE(rate->mcs < 6 || rate->mcs > 12)) 1450 return 0; 1451 1452 return __mcs2bitrate[rate->mcs - 6]; 1453 } 1454 1455 static u32 cfg80211_calculate_bitrate_edmg(struct rate_info *rate) 1456 { 1457 static const u32 __mcs2bitrate[] = { 1458 /* control PHY */ 1459 [0] = 275, 1460 /* SC PHY */ 1461 [1] = 3850, 1462 [2] = 7700, 1463 [3] = 9625, 1464 [4] = 11550, 1465 [5] = 12512, /* 1251.25 mbps */ 1466 [6] = 13475, 1467 [7] = 15400, 1468 [8] = 19250, 1469 [9] = 23100, 1470 [10] = 25025, 1471 [11] = 26950, 1472 [12] = 30800, 1473 [13] = 38500, 1474 [14] = 46200, 1475 [15] = 50050, 1476 [16] = 53900, 1477 [17] = 57750, 1478 [18] = 69300, 1479 [19] = 75075, 1480 [20] = 80850, 1481 }; 1482 1483 if (WARN_ON_ONCE(rate->mcs >= ARRAY_SIZE(__mcs2bitrate))) 1484 return 0; 1485 1486 return __mcs2bitrate[rate->mcs] * rate->n_bonded_ch; 1487 } 1488 1489 static u32 cfg80211_calculate_bitrate_vht(struct rate_info *rate) 1490 { 1491 static const u32 base[4][12] = { 1492 { 6500000, 1493 13000000, 1494 19500000, 1495 26000000, 1496 39000000, 1497 52000000, 1498 58500000, 1499 65000000, 1500 78000000, 1501 /* not in the spec, but some devices use this: */ 1502 86700000, 1503 97500000, 1504 108300000, 1505 }, 1506 { 13500000, 1507 27000000, 1508 40500000, 1509 54000000, 1510 81000000, 1511 108000000, 1512 121500000, 1513 135000000, 1514 162000000, 1515 180000000, 1516 202500000, 1517 225000000, 1518 }, 1519 { 29300000, 1520 58500000, 1521 87800000, 1522 117000000, 1523 175500000, 1524 234000000, 1525 263300000, 1526 292500000, 1527 351000000, 1528 390000000, 1529 438800000, 1530 487500000, 1531 }, 1532 { 58500000, 1533 117000000, 1534 175500000, 1535 234000000, 1536 351000000, 1537 468000000, 1538 526500000, 1539 585000000, 1540 702000000, 1541 780000000, 1542 877500000, 1543 975000000, 1544 }, 1545 }; 1546 u32 bitrate; 1547 int idx; 1548 1549 if (rate->mcs > 11) 1550 goto warn; 1551 1552 switch (rate->bw) { 1553 case RATE_INFO_BW_160: 1554 idx = 3; 1555 break; 1556 case RATE_INFO_BW_80: 1557 idx = 2; 1558 break; 1559 case RATE_INFO_BW_40: 1560 idx = 1; 1561 break; 1562 case RATE_INFO_BW_5: 1563 case RATE_INFO_BW_10: 1564 default: 1565 goto warn; 1566 case RATE_INFO_BW_20: 1567 idx = 0; 1568 } 1569 1570 bitrate = base[idx][rate->mcs]; 1571 bitrate *= rate->nss; 1572 1573 if (rate->flags & RATE_INFO_FLAGS_SHORT_GI) 1574 bitrate = (bitrate / 9) * 10; 1575 1576 /* do NOT round down here */ 1577 return (bitrate + 50000) / 100000; 1578 warn: 1579 WARN_ONCE(1, "invalid rate bw=%d, mcs=%d, nss=%d\n", 1580 rate->bw, rate->mcs, rate->nss); 1581 return 0; 1582 } 1583 1584 static u32 cfg80211_calculate_bitrate_he(struct rate_info *rate) 1585 { 1586 #define SCALE 6144 1587 u32 mcs_divisors[14] = { 1588 102399, /* 16.666666... */ 1589 51201, /* 8.333333... */ 1590 34134, /* 5.555555... */ 1591 25599, /* 4.166666... */ 1592 17067, /* 2.777777... */ 1593 12801, /* 2.083333... */ 1594 11377, /* 1.851725... */ 1595 10239, /* 1.666666... */ 1596 8532, /* 1.388888... */ 1597 7680, /* 1.250000... */ 1598 6828, /* 1.111111... */ 1599 6144, /* 1.000000... */ 1600 5690, /* 0.926106... */ 1601 5120, /* 0.833333... */ 1602 }; 1603 u32 rates_160M[3] = { 960777777, 907400000, 816666666 }; 1604 u32 rates_996[3] = { 480388888, 453700000, 408333333 }; 1605 u32 rates_484[3] = { 229411111, 216666666, 195000000 }; 1606 u32 rates_242[3] = { 114711111, 108333333, 97500000 }; 1607 u32 rates_106[3] = { 40000000, 37777777, 34000000 }; 1608 u32 rates_52[3] = { 18820000, 17777777, 16000000 }; 1609 u32 rates_26[3] = { 9411111, 8888888, 8000000 }; 1610 u64 tmp; 1611 u32 result; 1612 1613 if (WARN_ON_ONCE(rate->mcs > 13)) 1614 return 0; 1615 1616 if (WARN_ON_ONCE(rate->he_gi > NL80211_RATE_INFO_HE_GI_3_2)) 1617 return 0; 1618 if (WARN_ON_ONCE(rate->he_ru_alloc > 1619 NL80211_RATE_INFO_HE_RU_ALLOC_2x996)) 1620 return 0; 1621 if (WARN_ON_ONCE(rate->nss < 1 || rate->nss > 8)) 1622 return 0; 1623 1624 if (rate->bw == RATE_INFO_BW_160 || 1625 (rate->bw == RATE_INFO_BW_HE_RU && 1626 rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_2x996)) 1627 result = rates_160M[rate->he_gi]; 1628 else if (rate->bw == RATE_INFO_BW_80 || 1629 (rate->bw == RATE_INFO_BW_HE_RU && 1630 rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_996)) 1631 result = rates_996[rate->he_gi]; 1632 else if (rate->bw == RATE_INFO_BW_40 || 1633 (rate->bw == RATE_INFO_BW_HE_RU && 1634 rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_484)) 1635 result = rates_484[rate->he_gi]; 1636 else if (rate->bw == RATE_INFO_BW_20 || 1637 (rate->bw == RATE_INFO_BW_HE_RU && 1638 rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_242)) 1639 result = rates_242[rate->he_gi]; 1640 else if (rate->bw == RATE_INFO_BW_HE_RU && 1641 rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_106) 1642 result = rates_106[rate->he_gi]; 1643 else if (rate->bw == RATE_INFO_BW_HE_RU && 1644 rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_52) 1645 result = rates_52[rate->he_gi]; 1646 else if (rate->bw == RATE_INFO_BW_HE_RU && 1647 rate->he_ru_alloc == NL80211_RATE_INFO_HE_RU_ALLOC_26) 1648 result = rates_26[rate->he_gi]; 1649 else { 1650 WARN(1, "invalid HE MCS: bw:%d, ru:%d\n", 1651 rate->bw, rate->he_ru_alloc); 1652 return 0; 1653 } 1654 1655 /* now scale to the appropriate MCS */ 1656 tmp = result; 1657 tmp *= SCALE; 1658 do_div(tmp, mcs_divisors[rate->mcs]); 1659 1660 /* and take NSS, DCM into account */ 1661 tmp *= rate->nss; 1662 do_div(tmp, 8); 1663 if (rate->he_dcm) 1664 do_div(tmp, 2); 1665 1666 result = tmp; 1667 1668 return result / 10000; 1669 } 1670 1671 static u32 _cfg80211_calculate_bitrate_eht_uhr(struct rate_info *rate) 1672 { 1673 #define SCALE 6144 1674 static const u32 mcs_divisors[] = { 1675 [ 0] = 102399, /* 16.666666... */ 1676 [ 1] = 51201, /* 8.333333... */ 1677 [ 2] = 34134, /* 5.555555... */ 1678 [ 3] = 25599, /* 4.166666... */ 1679 [ 4] = 17067, /* 2.777777... */ 1680 [ 5] = 12801, /* 2.083333... */ 1681 [ 6] = 11377, /* 1.851725... */ 1682 [ 7] = 10239, /* 1.666666... */ 1683 [ 8] = 8532, /* 1.388888... */ 1684 [ 9] = 7680, /* 1.250000... */ 1685 [10] = 6828, /* 1.111111... */ 1686 [11] = 6144, /* 1.000000... */ 1687 [12] = 5690, /* 0.926106... */ 1688 [13] = 5120, /* 0.833333... */ 1689 [14] = 409600, /* 66.666666... */ 1690 [15] = 204800, /* 33.333333... */ 1691 [17] = 38400, /* 6.250180... */ 1692 [19] = 19200, /* 3.125090... */ 1693 [20] = 15360, /* 2.500000... */ 1694 [23] = 9600, /* 1.562545... */ 1695 }; 1696 static const u32 rates_996[3] = { 480388888, 453700000, 408333333 }; 1697 static const u32 rates_484[3] = { 229411111, 216666666, 195000000 }; 1698 static const u32 rates_242[3] = { 114711111, 108333333, 97500000 }; 1699 static const u32 rates_106[3] = { 40000000, 37777777, 34000000 }; 1700 static const u32 rates_52[3] = { 18820000, 17777777, 16000000 }; 1701 static const u32 rates_26[3] = { 9411111, 8888888, 8000000 }; 1702 u64 tmp; 1703 u32 result; 1704 1705 if (WARN_ON_ONCE(rate->eht_gi > NL80211_RATE_INFO_EHT_GI_3_2)) 1706 return 0; 1707 if (WARN_ON_ONCE(rate->eht_ru_alloc > 1708 NL80211_RATE_INFO_EHT_RU_ALLOC_4x996)) 1709 return 0; 1710 if (WARN_ON_ONCE(rate->nss < 1 || rate->nss > 8)) 1711 return 0; 1712 1713 /* Bandwidth checks for MCS 14 */ 1714 if (rate->mcs == 14) { 1715 if ((rate->bw != RATE_INFO_BW_EHT_RU && 1716 rate->bw != RATE_INFO_BW_80 && 1717 rate->bw != RATE_INFO_BW_160 && 1718 rate->bw != RATE_INFO_BW_320) || 1719 (rate->bw == RATE_INFO_BW_EHT_RU && 1720 rate->eht_ru_alloc != NL80211_RATE_INFO_EHT_RU_ALLOC_996 && 1721 rate->eht_ru_alloc != NL80211_RATE_INFO_EHT_RU_ALLOC_2x996 && 1722 rate->eht_ru_alloc != NL80211_RATE_INFO_EHT_RU_ALLOC_4x996)) { 1723 WARN(1, "invalid EHT BW for MCS 14: bw:%d, ru:%d\n", 1724 rate->bw, rate->eht_ru_alloc); 1725 return 0; 1726 } 1727 } 1728 1729 if (rate->bw == RATE_INFO_BW_320 || 1730 (rate->bw == RATE_INFO_BW_EHT_RU && 1731 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_4x996)) 1732 result = 4 * rates_996[rate->eht_gi]; 1733 else if (rate->bw == RATE_INFO_BW_EHT_RU && 1734 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_3x996P484) 1735 result = 3 * rates_996[rate->eht_gi] + rates_484[rate->eht_gi]; 1736 else if (rate->bw == RATE_INFO_BW_EHT_RU && 1737 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_3x996) 1738 result = 3 * rates_996[rate->eht_gi]; 1739 else if (rate->bw == RATE_INFO_BW_EHT_RU && 1740 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_2x996P484) 1741 result = 2 * rates_996[rate->eht_gi] + rates_484[rate->eht_gi]; 1742 else if (rate->bw == RATE_INFO_BW_160 || 1743 (rate->bw == RATE_INFO_BW_EHT_RU && 1744 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_2x996)) 1745 result = 2 * rates_996[rate->eht_gi]; 1746 else if (rate->bw == RATE_INFO_BW_EHT_RU && 1747 rate->eht_ru_alloc == 1748 NL80211_RATE_INFO_EHT_RU_ALLOC_996P484P242) 1749 result = rates_996[rate->eht_gi] + rates_484[rate->eht_gi] 1750 + rates_242[rate->eht_gi]; 1751 else if (rate->bw == RATE_INFO_BW_EHT_RU && 1752 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_996P484) 1753 result = rates_996[rate->eht_gi] + rates_484[rate->eht_gi]; 1754 else if (rate->bw == RATE_INFO_BW_80 || 1755 (rate->bw == RATE_INFO_BW_EHT_RU && 1756 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_996)) 1757 result = rates_996[rate->eht_gi]; 1758 else if (rate->bw == RATE_INFO_BW_EHT_RU && 1759 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_484P242) 1760 result = rates_484[rate->eht_gi] + rates_242[rate->eht_gi]; 1761 else if (rate->bw == RATE_INFO_BW_40 || 1762 (rate->bw == RATE_INFO_BW_EHT_RU && 1763 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_484)) 1764 result = rates_484[rate->eht_gi]; 1765 else if (rate->bw == RATE_INFO_BW_20 || 1766 (rate->bw == RATE_INFO_BW_EHT_RU && 1767 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_242)) 1768 result = rates_242[rate->eht_gi]; 1769 else if (rate->bw == RATE_INFO_BW_EHT_RU && 1770 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_106P26) 1771 result = rates_106[rate->eht_gi] + rates_26[rate->eht_gi]; 1772 else if (rate->bw == RATE_INFO_BW_EHT_RU && 1773 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_106) 1774 result = rates_106[rate->eht_gi]; 1775 else if (rate->bw == RATE_INFO_BW_EHT_RU && 1776 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_52P26) 1777 result = rates_52[rate->eht_gi] + rates_26[rate->eht_gi]; 1778 else if (rate->bw == RATE_INFO_BW_EHT_RU && 1779 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_52) 1780 result = rates_52[rate->eht_gi]; 1781 else if (rate->bw == RATE_INFO_BW_EHT_RU && 1782 rate->eht_ru_alloc == NL80211_RATE_INFO_EHT_RU_ALLOC_26) 1783 result = rates_26[rate->eht_gi]; 1784 else { 1785 WARN(1, "invalid EHT or UHR MCS: bw:%d, ru:%d\n", 1786 rate->bw, rate->eht_ru_alloc); 1787 return 0; 1788 } 1789 1790 /* now scale to the appropriate MCS */ 1791 tmp = result; 1792 tmp *= SCALE; 1793 do_div(tmp, mcs_divisors[rate->mcs]); 1794 1795 /* and take NSS */ 1796 tmp *= rate->nss; 1797 do_div(tmp, 8); 1798 1799 /* and handle interference mitigation - 0.9x */ 1800 if (rate->flags & RATE_INFO_FLAGS_UHR_IM) { 1801 if (WARN(rate->nss != 1 || rate->mcs == 15, 1802 "invalid NSS or MCS for UHR IM\n")) 1803 return 0; 1804 tmp *= 9000; 1805 do_div(tmp, 10000); 1806 } 1807 1808 result = tmp; 1809 1810 return result / 10000; 1811 } 1812 1813 static u32 cfg80211_calculate_bitrate_eht(struct rate_info *rate) 1814 { 1815 if (WARN_ONCE(rate->mcs > 15, "bad EHT MCS %d\n", rate->mcs)) 1816 return 0; 1817 1818 if (WARN_ONCE(rate->flags & (RATE_INFO_FLAGS_UHR_ELR_MCS | 1819 RATE_INFO_FLAGS_UHR_IM), 1820 "bad EHT MCS flags 0x%x\n", rate->flags)) 1821 return 0; 1822 1823 return _cfg80211_calculate_bitrate_eht_uhr(rate); 1824 } 1825 1826 static u32 cfg80211_calculate_bitrate_uhr(struct rate_info *rate) 1827 { 1828 if (rate->flags & RATE_INFO_FLAGS_UHR_ELR_MCS) { 1829 WARN_ONCE(rate->eht_gi != NL80211_RATE_INFO_EHT_GI_1_6, 1830 "bad UHR ELR guard interval %d\n", 1831 rate->eht_gi); 1832 WARN_ONCE(rate->mcs > 1, "bad UHR ELR MCS %d\n", rate->mcs); 1833 WARN_ONCE(rate->nss != 1, "bad UHR ELR NSS %d\n", rate->nss); 1834 WARN_ONCE(rate->bw != RATE_INFO_BW_20, 1835 "bad UHR ELR bandwidth %d\n", 1836 rate->bw); 1837 WARN_ONCE(rate->flags & RATE_INFO_FLAGS_UHR_IM, 1838 "bad UHR MCS flags 0x%x\n", rate->flags); 1839 if (rate->mcs == 0) 1840 return 17; 1841 return 33; 1842 } 1843 1844 switch (rate->mcs) { 1845 case 0 ... 15: 1846 case 17: 1847 case 19: 1848 case 20: 1849 case 23: 1850 return _cfg80211_calculate_bitrate_eht_uhr(rate); 1851 } 1852 1853 WARN_ONCE(1, "bad UHR MCS %d\n", rate->mcs); 1854 return 0; 1855 } 1856 1857 static u32 cfg80211_calculate_bitrate_s1g(struct rate_info *rate) 1858 { 1859 /* For 1, 2, 4, 8 and 16 MHz channels */ 1860 static const u32 base[5][11] = { 1861 { 300000, 1862 600000, 1863 900000, 1864 1200000, 1865 1800000, 1866 2400000, 1867 2700000, 1868 3000000, 1869 3600000, 1870 4000000, 1871 /* MCS 10 supported in 1 MHz only */ 1872 150000, 1873 }, 1874 { 650000, 1875 1300000, 1876 1950000, 1877 2600000, 1878 3900000, 1879 5200000, 1880 5850000, 1881 6500000, 1882 7800000, 1883 /* MCS 9 not valid */ 1884 }, 1885 { 1350000, 1886 2700000, 1887 4050000, 1888 5400000, 1889 8100000, 1890 10800000, 1891 12150000, 1892 13500000, 1893 16200000, 1894 18000000, 1895 }, 1896 { 2925000, 1897 5850000, 1898 8775000, 1899 11700000, 1900 17550000, 1901 23400000, 1902 26325000, 1903 29250000, 1904 35100000, 1905 39000000, 1906 }, 1907 { 8580000, 1908 11700000, 1909 17550000, 1910 23400000, 1911 35100000, 1912 46800000, 1913 52650000, 1914 58500000, 1915 70200000, 1916 78000000, 1917 }, 1918 }; 1919 u32 bitrate; 1920 /* default is 1 MHz index */ 1921 int idx = 0; 1922 1923 if (rate->mcs >= 11) 1924 goto warn; 1925 1926 switch (rate->bw) { 1927 case RATE_INFO_BW_16: 1928 idx = 4; 1929 break; 1930 case RATE_INFO_BW_8: 1931 idx = 3; 1932 break; 1933 case RATE_INFO_BW_4: 1934 idx = 2; 1935 break; 1936 case RATE_INFO_BW_2: 1937 idx = 1; 1938 break; 1939 case RATE_INFO_BW_1: 1940 idx = 0; 1941 break; 1942 case RATE_INFO_BW_5: 1943 case RATE_INFO_BW_10: 1944 case RATE_INFO_BW_20: 1945 case RATE_INFO_BW_40: 1946 case RATE_INFO_BW_80: 1947 case RATE_INFO_BW_160: 1948 default: 1949 goto warn; 1950 } 1951 1952 bitrate = base[idx][rate->mcs]; 1953 bitrate *= rate->nss; 1954 1955 if (rate->flags & RATE_INFO_FLAGS_SHORT_GI) 1956 bitrate = (bitrate / 9) * 10; 1957 /* do NOT round down here */ 1958 return (bitrate + 50000) / 100000; 1959 warn: 1960 WARN_ONCE(1, "invalid rate bw=%d, mcs=%d, nss=%d\n", 1961 rate->bw, rate->mcs, rate->nss); 1962 return 0; 1963 } 1964 1965 u32 cfg80211_calculate_bitrate(struct rate_info *rate) 1966 { 1967 if (rate->flags & RATE_INFO_FLAGS_MCS) 1968 return cfg80211_calculate_bitrate_ht(rate); 1969 if (rate->flags & RATE_INFO_FLAGS_DMG) 1970 return cfg80211_calculate_bitrate_dmg(rate); 1971 if (rate->flags & RATE_INFO_FLAGS_EXTENDED_SC_DMG) 1972 return cfg80211_calculate_bitrate_extended_sc_dmg(rate); 1973 if (rate->flags & RATE_INFO_FLAGS_EDMG) 1974 return cfg80211_calculate_bitrate_edmg(rate); 1975 if (rate->flags & RATE_INFO_FLAGS_VHT_MCS) 1976 return cfg80211_calculate_bitrate_vht(rate); 1977 if (rate->flags & RATE_INFO_FLAGS_HE_MCS) 1978 return cfg80211_calculate_bitrate_he(rate); 1979 if (rate->flags & RATE_INFO_FLAGS_EHT_MCS) 1980 return cfg80211_calculate_bitrate_eht(rate); 1981 if (rate->flags & RATE_INFO_FLAGS_UHR_MCS) 1982 return cfg80211_calculate_bitrate_uhr(rate); 1983 if (rate->flags & RATE_INFO_FLAGS_S1G_MCS) 1984 return cfg80211_calculate_bitrate_s1g(rate); 1985 1986 return rate->legacy; 1987 } 1988 EXPORT_SYMBOL(cfg80211_calculate_bitrate); 1989 1990 int cfg80211_get_p2p_attr(const u8 *ies, unsigned int len, 1991 enum ieee80211_p2p_attr_id attr, 1992 u8 *buf, unsigned int bufsize) 1993 { 1994 u8 *out = buf; 1995 u16 attr_remaining = 0; 1996 bool desired_attr = false; 1997 u16 desired_len = 0; 1998 1999 while (len > 0) { 2000 unsigned int iedatalen; 2001 unsigned int copy; 2002 const u8 *iedata; 2003 2004 if (len < 2) 2005 return -EILSEQ; 2006 iedatalen = ies[1]; 2007 if (iedatalen + 2 > len) 2008 return -EILSEQ; 2009 2010 if (ies[0] != WLAN_EID_VENDOR_SPECIFIC) 2011 goto cont; 2012 2013 if (iedatalen < 4) 2014 goto cont; 2015 2016 iedata = ies + 2; 2017 2018 /* check WFA OUI, P2P subtype */ 2019 if (iedata[0] != 0x50 || iedata[1] != 0x6f || 2020 iedata[2] != 0x9a || iedata[3] != 0x09) 2021 goto cont; 2022 2023 iedatalen -= 4; 2024 iedata += 4; 2025 2026 /* check attribute continuation into this IE */ 2027 copy = min_t(unsigned int, attr_remaining, iedatalen); 2028 if (copy && desired_attr) { 2029 desired_len += copy; 2030 if (out) { 2031 memcpy(out, iedata, min(bufsize, copy)); 2032 out += min(bufsize, copy); 2033 bufsize -= min(bufsize, copy); 2034 } 2035 2036 2037 if (copy == attr_remaining) 2038 return desired_len; 2039 } 2040 2041 attr_remaining -= copy; 2042 if (attr_remaining) 2043 goto cont; 2044 2045 iedatalen -= copy; 2046 iedata += copy; 2047 2048 while (iedatalen > 0) { 2049 u16 attr_len; 2050 2051 /* P2P attribute ID & size must fit */ 2052 if (iedatalen < 3) 2053 return -EILSEQ; 2054 desired_attr = iedata[0] == attr; 2055 attr_len = get_unaligned_le16(iedata + 1); 2056 iedatalen -= 3; 2057 iedata += 3; 2058 2059 copy = min_t(unsigned int, attr_len, iedatalen); 2060 2061 if (desired_attr) { 2062 desired_len += copy; 2063 if (out) { 2064 memcpy(out, iedata, min(bufsize, copy)); 2065 out += min(bufsize, copy); 2066 bufsize -= min(bufsize, copy); 2067 } 2068 2069 if (copy == attr_len) 2070 return desired_len; 2071 } 2072 2073 iedata += copy; 2074 iedatalen -= copy; 2075 attr_remaining = attr_len - copy; 2076 } 2077 2078 cont: 2079 len -= ies[1] + 2; 2080 ies += ies[1] + 2; 2081 } 2082 2083 if (attr_remaining && desired_attr) 2084 return -EILSEQ; 2085 2086 return -ENOENT; 2087 } 2088 EXPORT_SYMBOL(cfg80211_get_p2p_attr); 2089 2090 static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id, bool id_ext) 2091 { 2092 int i; 2093 2094 /* Make sure array values are legal */ 2095 if (WARN_ON(ids[n_ids - 1] == WLAN_EID_EXTENSION)) 2096 return false; 2097 2098 i = 0; 2099 while (i < n_ids) { 2100 if (ids[i] == WLAN_EID_EXTENSION) { 2101 if (id_ext && (ids[i + 1] == id)) 2102 return true; 2103 2104 i += 2; 2105 continue; 2106 } 2107 2108 if (ids[i] == id && !id_ext) 2109 return true; 2110 2111 i++; 2112 } 2113 return false; 2114 } 2115 2116 static size_t skip_ie(const u8 *ies, size_t ielen, size_t pos) 2117 { 2118 /* we assume a validly formed IEs buffer */ 2119 u8 len = ies[pos + 1]; 2120 2121 pos += 2 + len; 2122 2123 /* the IE itself must have 255 bytes for fragments to follow */ 2124 if (len < 255) 2125 return pos; 2126 2127 while (pos < ielen && ies[pos] == WLAN_EID_FRAGMENT) { 2128 len = ies[pos + 1]; 2129 pos += 2 + len; 2130 } 2131 2132 return pos; 2133 } 2134 2135 size_t ieee80211_ie_split_ric(const u8 *ies, size_t ielen, 2136 const u8 *ids, int n_ids, 2137 const u8 *after_ric, int n_after_ric, 2138 size_t offset) 2139 { 2140 size_t pos = offset; 2141 2142 while (pos < ielen) { 2143 u8 ext = 0; 2144 2145 if (ies[pos] == WLAN_EID_EXTENSION) 2146 ext = 2; 2147 if ((pos + ext) >= ielen) 2148 break; 2149 2150 if (!ieee80211_id_in_list(ids, n_ids, ies[pos + ext], 2151 ies[pos] == WLAN_EID_EXTENSION)) 2152 break; 2153 2154 if (ies[pos] == WLAN_EID_RIC_DATA && n_after_ric) { 2155 pos = skip_ie(ies, ielen, pos); 2156 2157 while (pos < ielen) { 2158 if (ies[pos] == WLAN_EID_EXTENSION) 2159 ext = 2; 2160 else 2161 ext = 0; 2162 2163 if ((pos + ext) >= ielen) 2164 break; 2165 2166 if (!ieee80211_id_in_list(after_ric, 2167 n_after_ric, 2168 ies[pos + ext], 2169 ext == 2)) 2170 pos = skip_ie(ies, ielen, pos); 2171 else 2172 break; 2173 } 2174 } else { 2175 pos = skip_ie(ies, ielen, pos); 2176 } 2177 } 2178 2179 return pos; 2180 } 2181 EXPORT_SYMBOL(ieee80211_ie_split_ric); 2182 2183 void ieee80211_fragment_element(struct sk_buff *skb, u8 *len_pos, u8 frag_id) 2184 { 2185 unsigned int elem_len; 2186 2187 if (!len_pos) 2188 return; 2189 2190 elem_len = skb->data + skb->len - len_pos - 1; 2191 2192 while (elem_len > 255) { 2193 /* this one is 255 */ 2194 *len_pos = 255; 2195 /* remaining data gets smaller */ 2196 elem_len -= 255; 2197 /* make space for the fragment ID/len in SKB */ 2198 skb_put(skb, 2); 2199 /* shift back the remaining data to place fragment ID/len */ 2200 memmove(len_pos + 255 + 3, len_pos + 255 + 1, elem_len); 2201 /* place the fragment ID */ 2202 len_pos += 255 + 1; 2203 *len_pos = frag_id; 2204 /* and point to fragment length to update later */ 2205 len_pos++; 2206 } 2207 2208 *len_pos = elem_len; 2209 } 2210 EXPORT_SYMBOL(ieee80211_fragment_element); 2211 2212 bool ieee80211_operating_class_to_band(u8 operating_class, 2213 enum nl80211_band *band) 2214 { 2215 switch (operating_class) { 2216 case 112: 2217 case 115 ... 127: 2218 case 128 ... 130: 2219 *band = NL80211_BAND_5GHZ; 2220 return true; 2221 case 131 ... 135: 2222 case 137: 2223 *band = NL80211_BAND_6GHZ; 2224 return true; 2225 case 81: 2226 case 82: 2227 case 83: 2228 case 84: 2229 *band = NL80211_BAND_2GHZ; 2230 return true; 2231 case 180: 2232 *band = NL80211_BAND_60GHZ; 2233 return true; 2234 } 2235 2236 return false; 2237 } 2238 EXPORT_SYMBOL(ieee80211_operating_class_to_band); 2239 2240 bool ieee80211_operating_class_to_chandef(u8 operating_class, 2241 struct ieee80211_channel *chan, 2242 struct cfg80211_chan_def *chandef) 2243 { 2244 u32 control_freq, offset = 0; 2245 enum nl80211_band band; 2246 2247 if (!ieee80211_operating_class_to_band(operating_class, &band) || 2248 !chan || band != chan->band) 2249 return false; 2250 2251 control_freq = chan->center_freq; 2252 chandef->chan = chan; 2253 2254 if (control_freq >= 5955) 2255 offset = control_freq - 5955; 2256 else if (control_freq >= 5745) 2257 offset = control_freq - 5745; 2258 else if (control_freq >= 5180) 2259 offset = control_freq - 5180; 2260 offset /= 20; 2261 2262 switch (operating_class) { 2263 case 81: /* 2 GHz band; 20 MHz; channels 1..13 */ 2264 case 82: /* 2 GHz band; 20 MHz; channel 14 */ 2265 case 115: /* 5 GHz band; 20 MHz; channels 36,40,44,48 */ 2266 case 118: /* 5 GHz band; 20 MHz; channels 52,56,60,64 */ 2267 case 121: /* 5 GHz band; 20 MHz; channels 100..144 */ 2268 case 124: /* 5 GHz band; 20 MHz; channels 149,153,157,161 */ 2269 case 125: /* 5 GHz band; 20 MHz; channels 149..177 */ 2270 case 131: /* 6 GHz band; 20 MHz; channels 1..233*/ 2271 case 136: /* 6 GHz band; 20 MHz; channel 2 */ 2272 chandef->center_freq1 = control_freq; 2273 chandef->width = NL80211_CHAN_WIDTH_20; 2274 return true; 2275 case 83: /* 2 GHz band; 40 MHz; channels 1..9 */ 2276 case 116: /* 5 GHz band; 40 MHz; channels 36,44 */ 2277 case 119: /* 5 GHz band; 40 MHz; channels 52,60 */ 2278 case 122: /* 5 GHz band; 40 MHz; channels 100,108,116,124,132,140 */ 2279 case 126: /* 5 GHz band; 40 MHz; channels 149,157,165,173 */ 2280 chandef->center_freq1 = control_freq + 10; 2281 chandef->width = NL80211_CHAN_WIDTH_40; 2282 return true; 2283 case 84: /* 2 GHz band; 40 MHz; channels 5..13 */ 2284 case 117: /* 5 GHz band; 40 MHz; channels 40,48 */ 2285 case 120: /* 5 GHz band; 40 MHz; channels 56,64 */ 2286 case 123: /* 5 GHz band; 40 MHz; channels 104,112,120,128,136,144 */ 2287 case 127: /* 5 GHz band; 40 MHz; channels 153,161,169,177 */ 2288 chandef->center_freq1 = control_freq - 10; 2289 chandef->width = NL80211_CHAN_WIDTH_40; 2290 return true; 2291 case 132: /* 6 GHz band; 40 MHz; channels 1,5,..,229*/ 2292 chandef->center_freq1 = control_freq + 10 - (offset & 1) * 20; 2293 chandef->width = NL80211_CHAN_WIDTH_40; 2294 return true; 2295 case 128: /* 5 GHz band; 80 MHz; channels 36..64,100..144,149..177 */ 2296 case 133: /* 6 GHz band; 80 MHz; channels 1,5,..,229 */ 2297 chandef->center_freq1 = control_freq + 30 - (offset & 3) * 20; 2298 chandef->width = NL80211_CHAN_WIDTH_80; 2299 return true; 2300 case 129: /* 5 GHz band; 160 MHz; channels 36..64,100..144,149..177 */ 2301 case 134: /* 6 GHz band; 160 MHz; channels 1,5,..,229 */ 2302 chandef->center_freq1 = control_freq + 70 - (offset & 7) * 20; 2303 chandef->width = NL80211_CHAN_WIDTH_160; 2304 return true; 2305 case 130: /* 5 GHz band; 80+80 MHz; channels 36..64,100..144,149..177 */ 2306 case 135: /* 6 GHz band; 80+80 MHz; channels 1,5,..,229 */ 2307 /* The center_freq2 of 80+80 MHz is unknown */ 2308 case 137: /* 6 GHz band; 320 MHz; channels 1,5,..,229 */ 2309 /* 320-1 or 320-2 channelization is unknown */ 2310 default: 2311 return false; 2312 } 2313 } 2314 EXPORT_SYMBOL(ieee80211_operating_class_to_chandef); 2315 2316 bool ieee80211_chandef_to_operating_class(struct cfg80211_chan_def *chandef, 2317 u8 *op_class) 2318 { 2319 u8 vht_opclass; 2320 u32 freq = chandef->center_freq1; 2321 2322 if (freq >= 2412 && freq <= 2472) { 2323 if (chandef->width > NL80211_CHAN_WIDTH_40) 2324 return false; 2325 2326 /* 2.407 GHz, channels 1..13 */ 2327 if (chandef->width == NL80211_CHAN_WIDTH_40) { 2328 if (freq > chandef->chan->center_freq) 2329 *op_class = 83; /* HT40+ */ 2330 else 2331 *op_class = 84; /* HT40- */ 2332 } else { 2333 *op_class = 81; 2334 } 2335 2336 return true; 2337 } 2338 2339 if (freq == 2484) { 2340 /* channel 14 is only for IEEE 802.11b */ 2341 if (chandef->width != NL80211_CHAN_WIDTH_20_NOHT) 2342 return false; 2343 2344 *op_class = 82; /* channel 14 */ 2345 return true; 2346 } 2347 2348 switch (chandef->width) { 2349 case NL80211_CHAN_WIDTH_80: 2350 vht_opclass = 128; 2351 break; 2352 case NL80211_CHAN_WIDTH_160: 2353 vht_opclass = 129; 2354 break; 2355 case NL80211_CHAN_WIDTH_80P80: 2356 vht_opclass = 130; 2357 break; 2358 default: 2359 vht_opclass = 0; 2360 break; 2361 } 2362 2363 /* 5 GHz, channels 36..48 */ 2364 if (freq >= 5180 && freq <= 5240) { 2365 if (vht_opclass) { 2366 *op_class = vht_opclass; 2367 } else if (chandef->width == NL80211_CHAN_WIDTH_40) { 2368 if (freq > chandef->chan->center_freq) 2369 *op_class = 116; 2370 else 2371 *op_class = 117; 2372 } else { 2373 *op_class = 115; 2374 } 2375 2376 return true; 2377 } 2378 2379 /* 5 GHz, channels 52..64 */ 2380 if (freq >= 5260 && freq <= 5320) { 2381 if (vht_opclass) { 2382 *op_class = vht_opclass; 2383 } else if (chandef->width == NL80211_CHAN_WIDTH_40) { 2384 if (freq > chandef->chan->center_freq) 2385 *op_class = 119; 2386 else 2387 *op_class = 120; 2388 } else { 2389 *op_class = 118; 2390 } 2391 2392 return true; 2393 } 2394 2395 /* 5 GHz, channels 100..144 */ 2396 if (freq >= 5500 && freq <= 5720) { 2397 if (vht_opclass) { 2398 *op_class = vht_opclass; 2399 } else if (chandef->width == NL80211_CHAN_WIDTH_40) { 2400 if (freq > chandef->chan->center_freq) 2401 *op_class = 122; 2402 else 2403 *op_class = 123; 2404 } else { 2405 *op_class = 121; 2406 } 2407 2408 return true; 2409 } 2410 2411 /* 5 GHz, channels 149..169 */ 2412 if (freq >= 5745 && freq <= 5845) { 2413 if (vht_opclass) { 2414 *op_class = vht_opclass; 2415 } else if (chandef->width == NL80211_CHAN_WIDTH_40) { 2416 if (freq > chandef->chan->center_freq) 2417 *op_class = 126; 2418 else 2419 *op_class = 127; 2420 } else if (freq <= 5805) { 2421 *op_class = 124; 2422 } else { 2423 *op_class = 125; 2424 } 2425 2426 return true; 2427 } 2428 2429 /* 56.16 GHz, channel 1..4 */ 2430 if (freq >= 56160 + 2160 * 1 && freq <= 56160 + 2160 * 6) { 2431 if (chandef->width >= NL80211_CHAN_WIDTH_40) 2432 return false; 2433 2434 *op_class = 180; 2435 return true; 2436 } 2437 2438 /* not supported yet */ 2439 return false; 2440 } 2441 EXPORT_SYMBOL(ieee80211_chandef_to_operating_class); 2442 2443 static int cfg80211_wdev_bi(struct wireless_dev *wdev) 2444 { 2445 switch (wdev->iftype) { 2446 case NL80211_IFTYPE_AP: 2447 case NL80211_IFTYPE_P2P_GO: 2448 WARN_ON(wdev->valid_links); 2449 return wdev->links[0].ap.beacon_interval; 2450 case NL80211_IFTYPE_MESH_POINT: 2451 return wdev->u.mesh.beacon_interval; 2452 case NL80211_IFTYPE_ADHOC: 2453 return wdev->u.ibss.beacon_interval; 2454 default: 2455 break; 2456 } 2457 2458 return 0; 2459 } 2460 2461 static void cfg80211_calculate_bi_data(struct wiphy *wiphy, u32 new_beacon_int, 2462 u32 *beacon_int_gcd, 2463 bool *beacon_int_different, 2464 int radio_idx) 2465 { 2466 struct cfg80211_registered_device *rdev; 2467 struct wireless_dev *wdev; 2468 2469 *beacon_int_gcd = 0; 2470 *beacon_int_different = false; 2471 2472 rdev = wiphy_to_rdev(wiphy); 2473 list_for_each_entry(wdev, &wiphy->wdev_list, list) { 2474 int wdev_bi; 2475 2476 /* this feature isn't supported with MLO */ 2477 if (wdev->valid_links) 2478 continue; 2479 2480 /* skip wdevs not active on the given wiphy radio */ 2481 if (radio_idx >= 0 && 2482 !(rdev_get_radio_mask(rdev, wdev->netdev) & BIT(radio_idx))) 2483 continue; 2484 2485 wdev_bi = cfg80211_wdev_bi(wdev); 2486 2487 if (!wdev_bi) 2488 continue; 2489 2490 if (!*beacon_int_gcd) { 2491 *beacon_int_gcd = wdev_bi; 2492 continue; 2493 } 2494 2495 if (wdev_bi == *beacon_int_gcd) 2496 continue; 2497 2498 *beacon_int_different = true; 2499 *beacon_int_gcd = gcd(*beacon_int_gcd, wdev_bi); 2500 } 2501 2502 if (new_beacon_int && *beacon_int_gcd != new_beacon_int) { 2503 if (*beacon_int_gcd) 2504 *beacon_int_different = true; 2505 *beacon_int_gcd = gcd(*beacon_int_gcd, new_beacon_int); 2506 } 2507 } 2508 2509 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev, 2510 enum nl80211_iftype iftype, u32 beacon_int) 2511 { 2512 /* 2513 * This is just a basic pre-condition check; if interface combinations 2514 * are possible the driver must already be checking those with a call 2515 * to cfg80211_check_combinations(), in which case we'll validate more 2516 * through the cfg80211_calculate_bi_data() call and code in 2517 * cfg80211_iter_combinations(). 2518 */ 2519 2520 if (beacon_int < 10 || beacon_int > 10000) 2521 return -EINVAL; 2522 2523 return 0; 2524 } 2525 2526 int cfg80211_iter_combinations(struct wiphy *wiphy, 2527 struct iface_combination_params *params, 2528 void (*iter)(const struct ieee80211_iface_combination *c, 2529 void *data), 2530 void *data) 2531 { 2532 const struct wiphy_radio *radio = NULL; 2533 const struct ieee80211_iface_combination *c, *cs; 2534 const struct ieee80211_regdomain *regdom; 2535 enum nl80211_dfs_regions region = 0; 2536 int i, j, n, iftype; 2537 int num_interfaces = 0; 2538 u32 used_iftypes = 0; 2539 u32 beacon_int_gcd; 2540 bool beacon_int_different; 2541 2542 if (params->radio_idx >= 0) 2543 radio = &wiphy->radio[params->radio_idx]; 2544 2545 /* 2546 * This is a bit strange, since the iteration used to rely only on 2547 * the data given by the driver, but here it now relies on context, 2548 * in form of the currently operating interfaces. 2549 * This is OK for all current users, and saves us from having to 2550 * push the GCD calculations into all the drivers. 2551 * In the future, this should probably rely more on data that's in 2552 * cfg80211 already - the only thing not would appear to be any new 2553 * interfaces (while being brought up) and channel/radar data. 2554 */ 2555 cfg80211_calculate_bi_data(wiphy, params->new_beacon_int, 2556 &beacon_int_gcd, &beacon_int_different, 2557 params->radio_idx); 2558 2559 if (params->radar_detect) { 2560 rcu_read_lock(); 2561 regdom = rcu_dereference(cfg80211_regdomain); 2562 if (regdom) 2563 region = regdom->dfs_region; 2564 rcu_read_unlock(); 2565 } 2566 2567 for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) { 2568 num_interfaces += params->iftype_num[iftype]; 2569 if (params->iftype_num[iftype] > 0 && 2570 !cfg80211_iftype_allowed(wiphy, iftype, 0, 1)) 2571 used_iftypes |= BIT(iftype); 2572 } 2573 2574 if (radio) { 2575 cs = radio->iface_combinations; 2576 n = radio->n_iface_combinations; 2577 } else { 2578 cs = wiphy->iface_combinations; 2579 n = wiphy->n_iface_combinations; 2580 } 2581 for (i = 0; i < n; i++) { 2582 struct ieee80211_iface_limit *limits; 2583 u32 all_iftypes = 0; 2584 2585 c = &cs[i]; 2586 if (num_interfaces > c->max_interfaces) 2587 continue; 2588 if (params->num_different_channels > c->num_different_channels) 2589 continue; 2590 2591 limits = kmemdup_array(c->limits, c->n_limits, sizeof(*limits), 2592 GFP_KERNEL); 2593 if (!limits) 2594 return -ENOMEM; 2595 2596 for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) { 2597 if (cfg80211_iftype_allowed(wiphy, iftype, 0, 1)) 2598 continue; 2599 for (j = 0; j < c->n_limits; j++) { 2600 all_iftypes |= limits[j].types; 2601 if (!(limits[j].types & BIT(iftype))) 2602 continue; 2603 if (limits[j].max < params->iftype_num[iftype]) 2604 goto cont; 2605 limits[j].max -= params->iftype_num[iftype]; 2606 } 2607 } 2608 2609 if (params->radar_detect != 2610 (c->radar_detect_widths & params->radar_detect)) 2611 goto cont; 2612 2613 if (params->radar_detect && c->radar_detect_regions && 2614 !(c->radar_detect_regions & BIT(region))) 2615 goto cont; 2616 2617 /* Finally check that all iftypes that we're currently 2618 * using are actually part of this combination. If they 2619 * aren't then we can't use this combination and have 2620 * to continue to the next. 2621 */ 2622 if ((all_iftypes & used_iftypes) != used_iftypes) 2623 goto cont; 2624 2625 if (beacon_int_gcd) { 2626 if (c->beacon_int_min_gcd && 2627 beacon_int_gcd < c->beacon_int_min_gcd) 2628 goto cont; 2629 if (!c->beacon_int_min_gcd && beacon_int_different) 2630 goto cont; 2631 } 2632 2633 /* This combination covered all interface types and 2634 * supported the requested numbers, so we're good. 2635 */ 2636 2637 (*iter)(c, data); 2638 cont: 2639 kfree(limits); 2640 } 2641 2642 return 0; 2643 } 2644 EXPORT_SYMBOL(cfg80211_iter_combinations); 2645 2646 static void 2647 cfg80211_iter_sum_ifcombs(const struct ieee80211_iface_combination *c, 2648 void *data) 2649 { 2650 int *num = data; 2651 (*num)++; 2652 } 2653 2654 int cfg80211_check_combinations(struct wiphy *wiphy, 2655 struct iface_combination_params *params) 2656 { 2657 int err, num = 0; 2658 2659 err = cfg80211_iter_combinations(wiphy, params, 2660 cfg80211_iter_sum_ifcombs, &num); 2661 if (err) 2662 return err; 2663 if (num == 0) 2664 return -EBUSY; 2665 2666 return 0; 2667 } 2668 EXPORT_SYMBOL(cfg80211_check_combinations); 2669 2670 int cfg80211_get_radio_idx_by_chan(struct wiphy *wiphy, 2671 const struct ieee80211_channel *chan) 2672 { 2673 const struct wiphy_radio *radio; 2674 int i, j; 2675 u32 freq; 2676 2677 if (!chan) 2678 return -EINVAL; 2679 2680 freq = ieee80211_channel_to_khz(chan); 2681 for (i = 0; i < wiphy->n_radio; i++) { 2682 radio = &wiphy->radio[i]; 2683 for (j = 0; j < radio->n_freq_range; j++) { 2684 if (freq >= radio->freq_range[j].start_freq && 2685 freq < radio->freq_range[j].end_freq) 2686 return i; 2687 } 2688 } 2689 2690 return -EINVAL; 2691 } 2692 EXPORT_SYMBOL(cfg80211_get_radio_idx_by_chan); 2693 2694 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband, 2695 const u8 *rates, unsigned int n_rates, 2696 u32 *mask) 2697 { 2698 int i, j; 2699 2700 if (!sband) 2701 return -EINVAL; 2702 2703 if (n_rates == 0 || n_rates > NL80211_MAX_SUPP_RATES) 2704 return -EINVAL; 2705 2706 *mask = 0; 2707 2708 for (i = 0; i < n_rates; i++) { 2709 int rate = (rates[i] & 0x7f) * 5; 2710 bool found = false; 2711 2712 for (j = 0; j < sband->n_bitrates; j++) { 2713 if (sband->bitrates[j].bitrate == rate) { 2714 found = true; 2715 *mask |= BIT(j); 2716 break; 2717 } 2718 } 2719 if (!found) 2720 return -EINVAL; 2721 } 2722 2723 /* 2724 * mask must have at least one bit set here since we 2725 * didn't accept a 0-length rates array nor allowed 2726 * entries in the array that didn't exist 2727 */ 2728 2729 return 0; 2730 } 2731 2732 unsigned int ieee80211_get_num_supported_channels(struct wiphy *wiphy) 2733 { 2734 enum nl80211_band band; 2735 unsigned int n_channels = 0; 2736 2737 for (band = 0; band < NUM_NL80211_BANDS; band++) 2738 if (wiphy->bands[band]) 2739 n_channels += wiphy->bands[band]->n_channels; 2740 2741 return n_channels; 2742 } 2743 EXPORT_SYMBOL(ieee80211_get_num_supported_channels); 2744 2745 int cfg80211_get_station(struct net_device *dev, const u8 *mac_addr, 2746 struct station_info *sinfo) 2747 { 2748 struct cfg80211_registered_device *rdev; 2749 struct wireless_dev *wdev; 2750 2751 wdev = dev->ieee80211_ptr; 2752 if (!wdev) 2753 return -EOPNOTSUPP; 2754 2755 rdev = wiphy_to_rdev(wdev->wiphy); 2756 if (!rdev->ops->get_station) 2757 return -EOPNOTSUPP; 2758 2759 memset(sinfo, 0, sizeof(*sinfo)); 2760 2761 guard(wiphy)(&rdev->wiphy); 2762 2763 return rdev_get_station(rdev, wdev, mac_addr, sinfo); 2764 } 2765 EXPORT_SYMBOL(cfg80211_get_station); 2766 2767 void cfg80211_free_nan_func(struct cfg80211_nan_func *f) 2768 { 2769 int i; 2770 2771 if (!f) 2772 return; 2773 2774 kfree(f->serv_spec_info); 2775 kfree(f->srf_bf); 2776 kfree(f->srf_macs); 2777 for (i = 0; i < f->num_rx_filters; i++) 2778 kfree(f->rx_filters[i].filter); 2779 2780 for (i = 0; i < f->num_tx_filters; i++) 2781 kfree(f->tx_filters[i].filter); 2782 2783 kfree(f->rx_filters); 2784 kfree(f->tx_filters); 2785 kfree(f); 2786 } 2787 EXPORT_SYMBOL(cfg80211_free_nan_func); 2788 2789 bool cfg80211_does_bw_fit_range(const struct ieee80211_freq_range *freq_range, 2790 u32 center_freq_khz, u32 bw_khz) 2791 { 2792 u32 start_freq_khz, end_freq_khz; 2793 2794 start_freq_khz = center_freq_khz - (bw_khz / 2); 2795 end_freq_khz = center_freq_khz + (bw_khz / 2); 2796 2797 if (start_freq_khz >= freq_range->start_freq_khz && 2798 end_freq_khz <= freq_range->end_freq_khz) 2799 return true; 2800 2801 return false; 2802 } 2803 2804 int cfg80211_link_sinfo_alloc_tid_stats(struct link_station_info *link_sinfo, 2805 gfp_t gfp) 2806 { 2807 link_sinfo->pertid = kzalloc_objs(*link_sinfo->pertid, 2808 IEEE80211_NUM_TIDS + 1, gfp); 2809 if (!link_sinfo->pertid) 2810 return -ENOMEM; 2811 2812 return 0; 2813 } 2814 EXPORT_SYMBOL(cfg80211_link_sinfo_alloc_tid_stats); 2815 2816 int cfg80211_sinfo_alloc_tid_stats(struct station_info *sinfo, gfp_t gfp) 2817 { 2818 sinfo->pertid = kzalloc_objs(*(sinfo->pertid), IEEE80211_NUM_TIDS + 1, 2819 gfp); 2820 if (!sinfo->pertid) 2821 return -ENOMEM; 2822 2823 return 0; 2824 } 2825 EXPORT_SYMBOL(cfg80211_sinfo_alloc_tid_stats); 2826 2827 /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */ 2828 /* Ethernet-II snap header (RFC1042 for most EtherTypes) */ 2829 const unsigned char rfc1042_header[] __aligned(2) = 2830 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 }; 2831 EXPORT_SYMBOL(rfc1042_header); 2832 2833 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */ 2834 const unsigned char bridge_tunnel_header[] __aligned(2) = 2835 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 }; 2836 EXPORT_SYMBOL(bridge_tunnel_header); 2837 2838 /* Layer 2 Update frame (802.2 Type 1 LLC XID Update response) */ 2839 struct iapp_layer2_update { 2840 u8 da[ETH_ALEN]; /* broadcast */ 2841 u8 sa[ETH_ALEN]; /* STA addr */ 2842 __be16 len; /* 6 */ 2843 u8 dsap; /* 0 */ 2844 u8 ssap; /* 0 */ 2845 u8 control; 2846 u8 xid_info[3]; 2847 } __packed; 2848 2849 void cfg80211_send_layer2_update(struct net_device *dev, const u8 *addr) 2850 { 2851 struct iapp_layer2_update *msg; 2852 struct sk_buff *skb; 2853 2854 /* Send Level 2 Update Frame to update forwarding tables in layer 2 2855 * bridge devices */ 2856 2857 skb = dev_alloc_skb(sizeof(*msg)); 2858 if (!skb) 2859 return; 2860 msg = skb_put(skb, sizeof(*msg)); 2861 2862 /* 802.2 Type 1 Logical Link Control (LLC) Exchange Identifier (XID) 2863 * Update response frame; IEEE Std 802.2-1998, 5.4.1.2.1 */ 2864 2865 eth_broadcast_addr(msg->da); 2866 ether_addr_copy(msg->sa, addr); 2867 msg->len = htons(6); 2868 msg->dsap = 0; 2869 msg->ssap = 0x01; /* NULL LSAP, CR Bit: Response */ 2870 msg->control = 0xaf; /* XID response lsb.1111F101. 2871 * F=0 (no poll command; unsolicited frame) */ 2872 msg->xid_info[0] = 0x81; /* XID format identifier */ 2873 msg->xid_info[1] = 1; /* LLC types/classes: Type 1 LLC */ 2874 msg->xid_info[2] = 0; /* XID sender's receive window size (RW) */ 2875 2876 skb->dev = dev; 2877 skb->protocol = eth_type_trans(skb, dev); 2878 memset(skb->cb, 0, sizeof(skb->cb)); 2879 netif_rx(skb); 2880 } 2881 EXPORT_SYMBOL(cfg80211_send_layer2_update); 2882 2883 int ieee80211_get_vht_max_nss(struct ieee80211_vht_cap *cap, 2884 enum ieee80211_vht_chanwidth bw, 2885 int mcs, bool ext_nss_bw_capable, 2886 unsigned int max_vht_nss) 2887 { 2888 u16 map = le16_to_cpu(cap->supp_mcs.rx_mcs_map); 2889 int ext_nss_bw; 2890 int supp_width; 2891 int i, mcs_encoding; 2892 2893 if (map == 0xffff) 2894 return 0; 2895 2896 if (WARN_ON(mcs > 9 || max_vht_nss > 8)) 2897 return 0; 2898 if (mcs <= 7) 2899 mcs_encoding = 0; 2900 else if (mcs == 8) 2901 mcs_encoding = 1; 2902 else 2903 mcs_encoding = 2; 2904 2905 if (!max_vht_nss) { 2906 /* find max_vht_nss for the given MCS */ 2907 for (i = 7; i >= 0; i--) { 2908 int supp = (map >> (2 * i)) & 3; 2909 2910 if (supp == 3) 2911 continue; 2912 2913 if (supp >= mcs_encoding) { 2914 max_vht_nss = i + 1; 2915 break; 2916 } 2917 } 2918 } 2919 2920 if (!(cap->supp_mcs.tx_mcs_map & 2921 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE))) 2922 return max_vht_nss; 2923 2924 ext_nss_bw = le32_get_bits(cap->vht_cap_info, 2925 IEEE80211_VHT_CAP_EXT_NSS_BW_MASK); 2926 supp_width = le32_get_bits(cap->vht_cap_info, 2927 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK); 2928 2929 /* if not capable, treat ext_nss_bw as 0 */ 2930 if (!ext_nss_bw_capable) 2931 ext_nss_bw = 0; 2932 2933 /* This is invalid */ 2934 if (supp_width == 3) 2935 return 0; 2936 2937 /* This is an invalid combination so pretend nothing is supported */ 2938 if (supp_width == 2 && (ext_nss_bw == 1 || ext_nss_bw == 2)) 2939 return 0; 2940 2941 /* 2942 * Cover all the special cases according to IEEE 802.11-2016 2943 * Table 9-250. All other cases are either factor of 1 or not 2944 * valid/supported. 2945 */ 2946 switch (bw) { 2947 case IEEE80211_VHT_CHANWIDTH_USE_HT: 2948 case IEEE80211_VHT_CHANWIDTH_80MHZ: 2949 if ((supp_width == 1 || supp_width == 2) && 2950 ext_nss_bw == 3) 2951 return 2 * max_vht_nss; 2952 break; 2953 case IEEE80211_VHT_CHANWIDTH_160MHZ: 2954 if (supp_width == 0 && 2955 (ext_nss_bw == 1 || ext_nss_bw == 2)) 2956 return max_vht_nss / 2; 2957 if (supp_width == 0 && 2958 ext_nss_bw == 3) 2959 return (3 * max_vht_nss) / 4; 2960 if (supp_width == 1 && 2961 ext_nss_bw == 3) 2962 return 2 * max_vht_nss; 2963 break; 2964 case IEEE80211_VHT_CHANWIDTH_80P80MHZ: 2965 if (supp_width == 0 && ext_nss_bw == 1) 2966 return 0; /* not possible */ 2967 if (supp_width == 0 && 2968 ext_nss_bw == 2) 2969 return max_vht_nss / 2; 2970 if (supp_width == 0 && 2971 ext_nss_bw == 3) 2972 return (3 * max_vht_nss) / 4; 2973 if (supp_width == 1 && 2974 ext_nss_bw == 0) 2975 return 0; /* not possible */ 2976 if (supp_width == 1 && 2977 ext_nss_bw == 1) 2978 return max_vht_nss / 2; 2979 if (supp_width == 1 && 2980 ext_nss_bw == 2) 2981 return (3 * max_vht_nss) / 4; 2982 break; 2983 } 2984 2985 /* not covered or invalid combination received */ 2986 return max_vht_nss; 2987 } 2988 EXPORT_SYMBOL(ieee80211_get_vht_max_nss); 2989 2990 bool cfg80211_iftype_allowed(struct wiphy *wiphy, enum nl80211_iftype iftype, 2991 bool is_4addr, u8 check_swif) 2992 2993 { 2994 bool is_vlan = iftype == NL80211_IFTYPE_AP_VLAN; 2995 2996 switch (check_swif) { 2997 case 0: 2998 if (is_vlan && is_4addr) 2999 return wiphy->flags & WIPHY_FLAG_4ADDR_AP; 3000 return wiphy->interface_modes & BIT(iftype); 3001 case 1: 3002 if (!(wiphy->software_iftypes & BIT(iftype)) && is_vlan) 3003 return wiphy->flags & WIPHY_FLAG_4ADDR_AP; 3004 return wiphy->software_iftypes & BIT(iftype); 3005 default: 3006 break; 3007 } 3008 3009 return false; 3010 } 3011 EXPORT_SYMBOL(cfg80211_iftype_allowed); 3012 3013 void cfg80211_remove_link(struct wireless_dev *wdev, unsigned int link_id) 3014 { 3015 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 3016 3017 lockdep_assert_wiphy(wdev->wiphy); 3018 3019 switch (wdev->iftype) { 3020 case NL80211_IFTYPE_AP: 3021 case NL80211_IFTYPE_P2P_GO: 3022 cfg80211_stop_ap(rdev, wdev->netdev, link_id, true); 3023 break; 3024 default: 3025 /* per-link not relevant */ 3026 break; 3027 } 3028 3029 rdev_del_intf_link(rdev, wdev, link_id); 3030 3031 wdev->valid_links &= ~BIT(link_id); 3032 eth_zero_addr(wdev->links[link_id].addr); 3033 } 3034 3035 void cfg80211_remove_links(struct wireless_dev *wdev) 3036 { 3037 unsigned int link_id; 3038 3039 /* 3040 * links are controlled by upper layers (userspace/cfg) 3041 * only for AP mode, so only remove them here for AP 3042 */ 3043 if (wdev->iftype != NL80211_IFTYPE_AP) 3044 return; 3045 3046 if (wdev->valid_links) { 3047 for_each_valid_link(wdev, link_id) 3048 cfg80211_remove_link(wdev, link_id); 3049 } 3050 } 3051 3052 int cfg80211_remove_virtual_intf(struct cfg80211_registered_device *rdev, 3053 struct wireless_dev *wdev) 3054 { 3055 cfg80211_remove_links(wdev); 3056 3057 return rdev_del_virtual_intf(rdev, wdev); 3058 } 3059 3060 const struct wiphy_iftype_ext_capab * 3061 cfg80211_get_iftype_ext_capa(struct wiphy *wiphy, enum nl80211_iftype type) 3062 { 3063 int i; 3064 3065 for (i = 0; i < wiphy->num_iftype_ext_capab; i++) { 3066 if (wiphy->iftype_ext_capab[i].iftype == type) 3067 return &wiphy->iftype_ext_capab[i]; 3068 } 3069 3070 return NULL; 3071 } 3072 EXPORT_SYMBOL(cfg80211_get_iftype_ext_capa); 3073 3074 bool ieee80211_radio_freq_range_valid(const struct wiphy_radio *radio, 3075 u32 freq, u32 width) 3076 { 3077 const struct wiphy_radio_freq_range *r; 3078 int i; 3079 3080 for (i = 0; i < radio->n_freq_range; i++) { 3081 r = &radio->freq_range[i]; 3082 if (freq - width / 2 >= r->start_freq && 3083 freq + width / 2 <= r->end_freq) 3084 return true; 3085 } 3086 3087 return false; 3088 } 3089 EXPORT_SYMBOL(ieee80211_radio_freq_range_valid); 3090 3091 bool cfg80211_radio_chandef_valid(const struct wiphy_radio *radio, 3092 const struct cfg80211_chan_def *chandef) 3093 { 3094 u32 freq, width; 3095 3096 freq = ieee80211_chandef_to_khz(chandef); 3097 width = MHZ_TO_KHZ(cfg80211_chandef_get_width(chandef)); 3098 if (!ieee80211_radio_freq_range_valid(radio, freq, width)) 3099 return false; 3100 3101 freq = MHZ_TO_KHZ(chandef->center_freq2); 3102 if (freq && !ieee80211_radio_freq_range_valid(radio, freq, width)) 3103 return false; 3104 3105 return true; 3106 } 3107 EXPORT_SYMBOL(cfg80211_radio_chandef_valid); 3108 3109 bool cfg80211_wdev_channel_allowed(struct wireless_dev *wdev, 3110 struct ieee80211_channel *chan) 3111 { 3112 struct wiphy *wiphy = wdev->wiphy; 3113 const struct wiphy_radio *radio; 3114 struct cfg80211_chan_def chandef; 3115 u32 radio_mask; 3116 int i; 3117 3118 radio_mask = wdev->radio_mask; 3119 if (!wiphy->n_radio || radio_mask == BIT(wiphy->n_radio) - 1) 3120 return true; 3121 3122 cfg80211_chandef_create(&chandef, chan, NL80211_CHAN_HT20); 3123 for (i = 0; i < wiphy->n_radio; i++) { 3124 if (!(radio_mask & BIT(i))) 3125 continue; 3126 3127 radio = &wiphy->radio[i]; 3128 if (!cfg80211_radio_chandef_valid(radio, &chandef)) 3129 continue; 3130 3131 return true; 3132 } 3133 3134 return false; 3135 } 3136 EXPORT_SYMBOL(cfg80211_wdev_channel_allowed); 3137