1 /* 2 * Common hostapd/wpa_supplicant HW features 3 * Copyright (c) 2002-2013, Jouni Malinen <j (at) w1.fi> 4 * Copyright (c) 2015, Qualcomm Atheros, Inc. 5 * 6 * This software may be distributed under the terms of the BSD license. 7 * See README for more details. 8 */ 9 10 #include "includes.h" 11 12 #include "common.h" 13 #include "defs.h" 14 #include "ieee802_11_defs.h" 15 #include "ieee802_11_common.h" 16 #include "hw_features_common.h" 17 18 19 struct hostapd_channel_data * hw_get_channel_chan(struct hostapd_hw_modes *mode, 20 int chan, int *freq) 21 { 22 int i; 23 24 if (freq) 25 *freq = 0; 26 27 if (!mode) 28 return NULL; 29 30 for (i = 0; i < mode->num_channels; i++) { 31 struct hostapd_channel_data *ch = &mode->channels[i]; 32 if (ch->chan == chan) { 33 if (freq) 34 *freq = ch->freq; 35 return ch; 36 } 37 } 38 39 return NULL; 40 } 41 42 43 struct hostapd_channel_data * 44 hw_mode_get_channel(struct hostapd_hw_modes *mode, int freq, int *chan) 45 { 46 int i; 47 48 for (i = 0; i < mode->num_channels; i++) { 49 struct hostapd_channel_data *ch = &mode->channels[i]; 50 51 if (ch->freq == freq) { 52 if (chan) 53 *chan = ch->chan; 54 return ch; 55 } 56 } 57 58 return NULL; 59 } 60 61 62 struct hostapd_channel_data * 63 hw_get_channel_freq(enum hostapd_hw_mode mode, int freq, int *chan, 64 struct hostapd_hw_modes *hw_features, int num_hw_features) 65 { 66 struct hostapd_channel_data *chan_data; 67 int i; 68 69 if (chan) 70 *chan = 0; 71 72 if (!hw_features) 73 return NULL; 74 75 for (i = 0; i < num_hw_features; i++) { 76 struct hostapd_hw_modes *curr_mode = &hw_features[i]; 77 78 if (curr_mode->mode != mode) 79 continue; 80 81 chan_data = hw_mode_get_channel(curr_mode, freq, chan); 82 if (chan_data) 83 return chan_data; 84 } 85 86 return NULL; 87 } 88 89 90 int hw_get_freq(struct hostapd_hw_modes *mode, int chan) 91 { 92 int freq; 93 94 hw_get_channel_chan(mode, chan, &freq); 95 96 return freq; 97 } 98 99 100 int hw_get_chan(enum hostapd_hw_mode mode, int freq, 101 struct hostapd_hw_modes *hw_features, int num_hw_features) 102 { 103 int chan; 104 105 hw_get_channel_freq(mode, freq, &chan, hw_features, num_hw_features); 106 107 return chan; 108 } 109 110 111 int allowed_ht40_channel_pair(enum hostapd_hw_mode mode, 112 struct hostapd_channel_data *p_chan, 113 struct hostapd_channel_data *s_chan) 114 { 115 int ok, first; 116 int allowed[] = { 36, 44, 52, 60, 100, 108, 116, 124, 132, 140, 117 149, 157, 165, 173, 184, 192 }; 118 size_t k; 119 int ht40_plus, pri_chan, sec_chan; 120 121 if (!p_chan || !s_chan) 122 return 0; 123 pri_chan = p_chan->chan; 124 sec_chan = s_chan->chan; 125 126 ht40_plus = pri_chan < sec_chan; 127 128 if (pri_chan == sec_chan || !sec_chan) { 129 if (chan_pri_allowed(p_chan)) 130 return 1; /* HT40 not used */ 131 132 wpa_printf(MSG_ERROR, "Channel %d is not allowed as primary", 133 pri_chan); 134 return 0; 135 } 136 137 wpa_printf(MSG_DEBUG, 138 "HT40: control channel: %d (%d MHz), secondary channel: %d (%d MHz)", 139 pri_chan, p_chan->freq, sec_chan, s_chan->freq); 140 141 /* Verify that HT40 secondary channel is an allowed 20 MHz 142 * channel */ 143 if ((s_chan->flag & HOSTAPD_CHAN_DISABLED) || 144 (ht40_plus && !(p_chan->allowed_bw & HOSTAPD_CHAN_WIDTH_40P)) || 145 (!ht40_plus && !(p_chan->allowed_bw & HOSTAPD_CHAN_WIDTH_40M))) { 146 wpa_printf(MSG_ERROR, "HT40 secondary channel %d not allowed", 147 sec_chan); 148 return 0; 149 } 150 151 /* 152 * Verify that HT40 primary,secondary channel pair is allowed per 153 * IEEE 802.11n Annex J. This is only needed for 5 GHz band since 154 * 2.4 GHz rules allow all cases where the secondary channel fits into 155 * the list of allowed channels (already checked above). 156 */ 157 if (mode != HOSTAPD_MODE_IEEE80211A) 158 return 1; 159 160 first = pri_chan < sec_chan ? pri_chan : sec_chan; 161 162 ok = 0; 163 for (k = 0; k < ARRAY_SIZE(allowed); k++) { 164 if (first == allowed[k]) { 165 ok = 1; 166 break; 167 } 168 } 169 if (!ok) { 170 wpa_printf(MSG_ERROR, "HT40 channel pair (%d, %d) not allowed", 171 pri_chan, sec_chan); 172 return 0; 173 } 174 175 return 1; 176 } 177 178 179 void get_pri_sec_chan(struct wpa_scan_res *bss, int *pri_chan, int *sec_chan) 180 { 181 struct ieee80211_ht_operation *oper; 182 struct ieee802_11_elems elems; 183 184 *pri_chan = *sec_chan = 0; 185 186 if (ieee802_11_parse_elems((u8 *) (bss + 1), bss->ie_len, &elems, 0) != 187 ParseFailed && elems.ht_operation) { 188 oper = (struct ieee80211_ht_operation *) elems.ht_operation; 189 *pri_chan = oper->primary_chan; 190 if (oper->ht_param & HT_INFO_HT_PARAM_STA_CHNL_WIDTH) { 191 int sec = oper->ht_param & 192 HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK; 193 if (sec == HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE) 194 *sec_chan = *pri_chan + 4; 195 else if (sec == HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW) 196 *sec_chan = *pri_chan - 4; 197 } 198 } 199 } 200 201 202 int check_40mhz_5g(struct wpa_scan_results *scan_res, 203 struct hostapd_channel_data *pri_chan, 204 struct hostapd_channel_data *sec_chan) 205 { 206 int pri_bss, sec_bss; 207 int bss_pri_chan, bss_sec_chan; 208 size_t i; 209 int match; 210 211 if (!scan_res || !pri_chan || !sec_chan || 212 pri_chan->freq == sec_chan->freq) 213 return 0; 214 215 /* 216 * Switch PRI/SEC channels if Beacons were detected on selected SEC 217 * channel, but not on selected PRI channel. 218 */ 219 pri_bss = sec_bss = 0; 220 for (i = 0; i < scan_res->num; i++) { 221 struct wpa_scan_res *bss = scan_res->res[i]; 222 if (bss->freq == pri_chan->freq) 223 pri_bss++; 224 else if (bss->freq == sec_chan->freq) 225 sec_bss++; 226 } 227 if (sec_bss && !pri_bss) { 228 wpa_printf(MSG_INFO, 229 "Switch own primary and secondary channel to get secondary channel with no Beacons from other BSSes"); 230 return 2; 231 } 232 233 /* 234 * Match PRI/SEC channel with any existing HT40 BSS on the same 235 * channels that we are about to use (if already mixed order in 236 * existing BSSes, use own preference). 237 */ 238 match = 0; 239 for (i = 0; i < scan_res->num; i++) { 240 struct wpa_scan_res *bss = scan_res->res[i]; 241 get_pri_sec_chan(bss, &bss_pri_chan, &bss_sec_chan); 242 if (pri_chan->chan == bss_pri_chan && 243 sec_chan->chan == bss_sec_chan) { 244 match = 1; 245 break; 246 } 247 } 248 if (!match) { 249 for (i = 0; i < scan_res->num; i++) { 250 struct wpa_scan_res *bss = scan_res->res[i]; 251 get_pri_sec_chan(bss, &bss_pri_chan, &bss_sec_chan); 252 if (pri_chan->chan == bss_sec_chan && 253 sec_chan->chan == bss_pri_chan) { 254 wpa_printf(MSG_INFO, "Switch own primary and " 255 "secondary channel due to BSS " 256 "overlap with " MACSTR, 257 MAC2STR(bss->bssid)); 258 return 2; 259 } 260 } 261 } 262 263 return 1; 264 } 265 266 267 static int check_20mhz_bss(struct wpa_scan_res *bss, int pri_freq, int start, 268 int end) 269 { 270 struct ieee802_11_elems elems; 271 struct ieee80211_ht_operation *oper; 272 273 if (bss->freq < start || bss->freq > end || bss->freq == pri_freq) 274 return 0; 275 276 if (ieee802_11_parse_elems((u8 *) (bss + 1), bss->ie_len, &elems, 0) == 277 ParseFailed) 278 return 0; 279 280 if (!elems.ht_capabilities) { 281 wpa_printf(MSG_DEBUG, "Found overlapping legacy BSS: " 282 MACSTR " freq=%d", MAC2STR(bss->bssid), bss->freq); 283 return 1; 284 } 285 286 if (elems.ht_operation) { 287 oper = (struct ieee80211_ht_operation *) elems.ht_operation; 288 if (oper->ht_param & HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK) 289 return 0; 290 291 wpa_printf(MSG_DEBUG, "Found overlapping 20 MHz HT BSS: " 292 MACSTR " freq=%d", MAC2STR(bss->bssid), bss->freq); 293 return 1; 294 } 295 return 0; 296 } 297 298 299 int check_40mhz_2g4(struct hostapd_hw_modes *mode, 300 struct wpa_scan_results *scan_res, int pri_chan, 301 int sec_chan) 302 { 303 int pri_freq, sec_freq; 304 int affected_start, affected_end; 305 size_t i; 306 307 if (!mode || !scan_res || !pri_chan || !sec_chan || 308 pri_chan == sec_chan) 309 return 0; 310 311 pri_freq = hw_get_freq(mode, pri_chan); 312 sec_freq = hw_get_freq(mode, sec_chan); 313 314 affected_start = (pri_freq + sec_freq) / 2 - 25; 315 affected_end = (pri_freq + sec_freq) / 2 + 25; 316 wpa_printf(MSG_DEBUG, "40 MHz affected channel range: [%d,%d] MHz", 317 affected_start, affected_end); 318 for (i = 0; i < scan_res->num; i++) { 319 struct wpa_scan_res *bss = scan_res->res[i]; 320 int pri = bss->freq; 321 int sec = pri; 322 struct ieee802_11_elems elems; 323 324 /* Check for overlapping 20 MHz BSS */ 325 if (check_20mhz_bss(bss, pri_freq, affected_start, 326 affected_end)) { 327 wpa_printf(MSG_DEBUG, 328 "Overlapping 20 MHz BSS is found"); 329 return 0; 330 } 331 332 get_pri_sec_chan(bss, &pri_chan, &sec_chan); 333 334 if (sec_chan) { 335 if (sec_chan < pri_chan) 336 sec = pri - 20; 337 else 338 sec = pri + 20; 339 } 340 341 if ((pri < affected_start || pri > affected_end) && 342 (sec < affected_start || sec > affected_end)) 343 continue; /* not within affected channel range */ 344 345 wpa_printf(MSG_DEBUG, "Neighboring BSS: " MACSTR 346 " freq=%d pri=%d sec=%d", 347 MAC2STR(bss->bssid), bss->freq, pri_chan, sec_chan); 348 349 if (sec_chan) { 350 if (pri_freq != pri || sec_freq != sec) { 351 wpa_printf(MSG_DEBUG, 352 "40 MHz pri/sec mismatch with BSS " 353 MACSTR 354 " <%d,%d> (chan=%d%c) vs. <%d,%d>", 355 MAC2STR(bss->bssid), 356 pri, sec, pri_chan, 357 sec > pri ? '+' : '-', 358 pri_freq, sec_freq); 359 return 0; 360 } 361 } 362 363 if (ieee802_11_parse_elems((u8 *) (bss + 1), bss->ie_len, 364 &elems, 0) != ParseFailed && 365 elems.ht_capabilities) { 366 struct ieee80211_ht_capabilities *ht_cap = 367 (struct ieee80211_ht_capabilities *) 368 elems.ht_capabilities; 369 370 if (le_to_host16(ht_cap->ht_capabilities_info) & 371 HT_CAP_INFO_40MHZ_INTOLERANT) { 372 wpa_printf(MSG_DEBUG, 373 "40 MHz Intolerant is set on channel %d in BSS " 374 MACSTR, pri, MAC2STR(bss->bssid)); 375 return 0; 376 } 377 } 378 } 379 380 return 1; 381 } 382 383 384 static void punct_update_legacy_bw_80(u8 bitmap, u8 pri_chan, u8 *seg0) 385 { 386 u8 first_chan = *seg0 - 6, sec_chan; 387 388 switch (bitmap) { 389 case 0x6: 390 *seg0 = 0; 391 return; 392 case 0x8: 393 case 0x4: 394 case 0x2: 395 case 0x1: 396 case 0xC: 397 case 0x3: 398 if (pri_chan < *seg0) 399 *seg0 -= 4; 400 else 401 *seg0 += 4; 402 break; 403 } 404 405 if (pri_chan < *seg0) 406 sec_chan = pri_chan + 4; 407 else 408 sec_chan = pri_chan - 4; 409 410 if (bitmap & BIT((sec_chan - first_chan) / 4)) 411 *seg0 = 0; 412 } 413 414 415 static void punct_update_legacy_bw_160(u8 bitmap, u8 pri, 416 enum oper_chan_width *width, u8 *seg0) 417 { 418 if (pri < *seg0) { 419 *seg0 -= 8; 420 if (bitmap & 0x0F) { 421 *width = 0; 422 punct_update_legacy_bw_80(bitmap & 0xF, pri, seg0); 423 } 424 } else { 425 *seg0 += 8; 426 if (bitmap & 0xF0) { 427 *width = 0; 428 punct_update_legacy_bw_80((bitmap & 0xF0) >> 4, pri, 429 seg0); 430 } 431 } 432 } 433 434 435 void punct_update_legacy_bw(u16 bitmap, u8 pri, enum oper_chan_width *width, 436 u8 *seg0, u8 *seg1) 437 { 438 if (*width == CONF_OPER_CHWIDTH_80MHZ && (bitmap & 0xF)) { 439 *width = CONF_OPER_CHWIDTH_USE_HT; 440 punct_update_legacy_bw_80(bitmap & 0xF, pri, seg0); 441 } 442 443 if (*width == CONF_OPER_CHWIDTH_160MHZ && (bitmap & 0xFF)) { 444 *width = CONF_OPER_CHWIDTH_80MHZ; 445 *seg1 = 0; 446 punct_update_legacy_bw_160(bitmap & 0xFF, pri, width, seg0); 447 } 448 449 /* TODO: 320 MHz */ 450 } 451 452 453 int hostapd_set_freq_params(struct hostapd_freq_params *data, 454 enum hostapd_hw_mode mode, 455 int freq, int channel, int enable_edmg, 456 u8 edmg_channel, int ht_enabled, 457 int vht_enabled, int he_enabled, 458 bool eht_enabled, int sec_channel_offset, 459 enum oper_chan_width oper_chwidth, 460 int center_segment0, 461 int center_segment1, u32 vht_caps, 462 struct he_capabilities *he_cap, 463 struct eht_capabilities *eht_cap, 464 u16 punct_bitmap) 465 { 466 enum oper_chan_width oper_chwidth_legacy; 467 u8 seg0_legacy, seg1_legacy; 468 469 if (!he_cap || !he_cap->he_supported) 470 he_enabled = 0; 471 if (!eht_cap || !eht_cap->eht_supported) 472 eht_enabled = 0; 473 os_memset(data, 0, sizeof(*data)); 474 data->mode = mode; 475 data->freq = freq; 476 data->channel = channel; 477 data->ht_enabled = ht_enabled; 478 data->vht_enabled = vht_enabled; 479 data->he_enabled = he_enabled; 480 data->eht_enabled = eht_enabled; 481 data->sec_channel_offset = sec_channel_offset; 482 data->center_freq1 = freq + sec_channel_offset * 10; 483 data->center_freq2 = 0; 484 if (oper_chwidth == CONF_OPER_CHWIDTH_80MHZ) 485 data->bandwidth = 80; 486 else if (oper_chwidth == CONF_OPER_CHWIDTH_160MHZ || 487 oper_chwidth == CONF_OPER_CHWIDTH_80P80MHZ) 488 data->bandwidth = 160; 489 else if (oper_chwidth == CONF_OPER_CHWIDTH_320MHZ) 490 data->bandwidth = 320; 491 else if (sec_channel_offset) 492 data->bandwidth = 40; 493 else 494 data->bandwidth = 20; 495 496 497 hostapd_encode_edmg_chan(enable_edmg, edmg_channel, channel, 498 &data->edmg); 499 500 if (is_6ghz_freq(freq)) { 501 if (!data->he_enabled && !data->eht_enabled) { 502 wpa_printf(MSG_ERROR, 503 "Can't set 6 GHz mode - HE or EHT aren't enabled"); 504 return -1; 505 } 506 507 if (center_idx_to_bw_6ghz(channel) < 0) { 508 wpa_printf(MSG_ERROR, 509 "Invalid control channel for 6 GHz band"); 510 return -1; 511 } 512 513 if (!center_segment0) { 514 if (center_segment1) { 515 wpa_printf(MSG_ERROR, 516 "Segment 0 center frequency isn't set"); 517 return -1; 518 } 519 if (!sec_channel_offset) 520 data->center_freq1 = data->freq; 521 } else { 522 int freq1, freq2 = 0; 523 int bw = center_idx_to_bw_6ghz(center_segment0); 524 int opclass; 525 526 if (bw < 0) { 527 wpa_printf(MSG_ERROR, 528 "Invalid center frequency index for 6 GHz"); 529 return -1; 530 } 531 532 /* The 6 GHz channel 2 uses a different operating class 533 */ 534 opclass = center_segment0 == 2 ? 136 : 131; 535 freq1 = ieee80211_chan_to_freq(NULL, opclass, 536 center_segment0); 537 if (freq1 < 0) { 538 wpa_printf(MSG_ERROR, 539 "Invalid segment 0 center frequency for 6 GHz"); 540 return -1; 541 } 542 543 if (center_segment1) { 544 if (center_idx_to_bw_6ghz(center_segment1) != 2 || 545 bw != 2) { 546 wpa_printf(MSG_ERROR, 547 "6 GHz 80+80 MHz configuration doesn't use valid 80 MHz channels"); 548 return -1; 549 } 550 551 freq2 = ieee80211_chan_to_freq(NULL, 131, 552 center_segment1); 553 if (freq2 < 0) { 554 wpa_printf(MSG_ERROR, 555 "Invalid segment 1 center frequency for UHB"); 556 return -1; 557 } 558 } 559 560 data->bandwidth = (1 << (u8) bw) * 20; 561 data->center_freq1 = freq1; 562 data->center_freq2 = freq2; 563 } 564 data->ht_enabled = 0; 565 data->vht_enabled = 0; 566 567 return 0; 568 } 569 570 if (data->eht_enabled) switch (oper_chwidth) { 571 case CONF_OPER_CHWIDTH_320MHZ: 572 if (!(eht_cap->phy_cap[EHT_PHYCAP_320MHZ_IN_6GHZ_SUPPORT_IDX] & 573 EHT_PHYCAP_320MHZ_IN_6GHZ_SUPPORT_MASK)) { 574 wpa_printf(MSG_ERROR, 575 "320 MHz channel width is not supported in 5 or 6 GHz"); 576 return -1; 577 } 578 break; 579 default: 580 break; 581 } 582 583 if (data->he_enabled || data->eht_enabled) switch (oper_chwidth) { 584 case CONF_OPER_CHWIDTH_USE_HT: 585 if (sec_channel_offset == 0) 586 break; 587 588 if (mode == HOSTAPD_MODE_IEEE80211G) { 589 if (he_cap && 590 !(he_cap->phy_cap[HE_PHYCAP_CHANNEL_WIDTH_SET_IDX] & 591 HE_PHYCAP_CHANNEL_WIDTH_SET_40MHZ_IN_2G)) { 592 wpa_printf(MSG_ERROR, 593 "40 MHz channel width is not supported in 2.4 GHz"); 594 return -1; 595 } 596 break; 597 } 598 /* fall through */ 599 case CONF_OPER_CHWIDTH_80MHZ: 600 if (mode == HOSTAPD_MODE_IEEE80211A) { 601 if (he_cap && 602 !(he_cap->phy_cap[HE_PHYCAP_CHANNEL_WIDTH_SET_IDX] & 603 HE_PHYCAP_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G)) { 604 wpa_printf(MSG_ERROR, 605 "40/80 MHz channel width is not supported in 5/6 GHz"); 606 return -1; 607 } 608 } 609 break; 610 case CONF_OPER_CHWIDTH_80P80MHZ: 611 if (he_cap && 612 !(he_cap->phy_cap[HE_PHYCAP_CHANNEL_WIDTH_SET_IDX] & 613 HE_PHYCAP_CHANNEL_WIDTH_SET_80PLUS80MHZ_IN_5G)) { 614 wpa_printf(MSG_ERROR, 615 "80+80 MHz channel width is not supported in 5/6 GHz"); 616 return -1; 617 } 618 break; 619 case CONF_OPER_CHWIDTH_160MHZ: 620 if (he_cap && 621 !(he_cap->phy_cap[HE_PHYCAP_CHANNEL_WIDTH_SET_IDX] & 622 HE_PHYCAP_CHANNEL_WIDTH_SET_160MHZ_IN_5G)) { 623 wpa_printf(MSG_ERROR, 624 "160 MHz channel width is not supported in 5 / 6GHz"); 625 return -1; 626 } 627 break; 628 default: 629 break; 630 } else if (data->vht_enabled) switch (oper_chwidth) { 631 case CONF_OPER_CHWIDTH_USE_HT: 632 break; 633 case CONF_OPER_CHWIDTH_80P80MHZ: 634 if (!(vht_caps & VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)) { 635 wpa_printf(MSG_ERROR, 636 "80+80 channel width is not supported!"); 637 return -1; 638 } 639 /* fall through */ 640 case CONF_OPER_CHWIDTH_80MHZ: 641 break; 642 case CONF_OPER_CHWIDTH_160MHZ: 643 if (!(vht_caps & (VHT_CAP_SUPP_CHAN_WIDTH_160MHZ | 644 VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ))) { 645 wpa_printf(MSG_ERROR, 646 "160 MHz channel width is not supported!"); 647 return -1; 648 } 649 break; 650 default: 651 break; 652 } 653 654 oper_chwidth_legacy = oper_chwidth; 655 seg0_legacy = center_segment0; 656 seg1_legacy = center_segment1; 657 if (punct_bitmap) 658 punct_update_legacy_bw(punct_bitmap, channel, 659 &oper_chwidth_legacy, 660 &seg0_legacy, &seg1_legacy); 661 662 if (data->eht_enabled || data->he_enabled || 663 data->vht_enabled) switch (oper_chwidth) { 664 case CONF_OPER_CHWIDTH_USE_HT: 665 if (center_segment1 || 666 (center_segment0 != 0 && 667 5000 + center_segment0 * 5 != data->center_freq1 && 668 2407 + center_segment0 * 5 != data->center_freq1)) { 669 wpa_printf(MSG_ERROR, 670 "20/40 MHz: center segment 0 (=%d) and center freq 1 (=%d) not in sync", 671 center_segment0, data->center_freq1); 672 return -1; 673 } 674 break; 675 case CONF_OPER_CHWIDTH_80P80MHZ: 676 if (center_segment1 == center_segment0 + 4 || 677 center_segment1 == center_segment0 - 4) { 678 wpa_printf(MSG_ERROR, 679 "80+80 MHz: center segment 1 only 20 MHz apart"); 680 return -1; 681 } 682 data->center_freq2 = 5000 + center_segment1 * 5; 683 /* fall through */ 684 case CONF_OPER_CHWIDTH_80MHZ: 685 data->bandwidth = 80; 686 if (!sec_channel_offset && 687 oper_chwidth_legacy != CONF_OPER_CHWIDTH_USE_HT) { 688 wpa_printf(MSG_ERROR, 689 "80/80+80 MHz: no second channel offset"); 690 return -1; 691 } 692 if (oper_chwidth == CONF_OPER_CHWIDTH_80MHZ && 693 center_segment1) { 694 wpa_printf(MSG_ERROR, 695 "80 MHz: center segment 1 configured"); 696 return -1; 697 } 698 if (oper_chwidth == CONF_OPER_CHWIDTH_80P80MHZ && 699 !center_segment1) { 700 wpa_printf(MSG_ERROR, 701 "80+80 MHz: center segment 1 not configured"); 702 return -1; 703 } 704 if (!center_segment0) { 705 if (channel <= 48) 706 center_segment0 = 42; 707 else if (channel <= 64) 708 center_segment0 = 58; 709 else if (channel <= 112) 710 center_segment0 = 106; 711 else if (channel <= 128) 712 center_segment0 = 122; 713 else if (channel <= 144) 714 center_segment0 = 138; 715 else if (channel <= 161) 716 center_segment0 = 155; 717 else if (channel <= 177) 718 center_segment0 = 171; 719 data->center_freq1 = 5000 + center_segment0 * 5; 720 } else { 721 /* 722 * Note: HT/VHT config and params are coupled. Check if 723 * HT40 channel band is in VHT80 Pri channel band 724 * configuration. 725 */ 726 if (center_segment0 == channel + 6 || 727 center_segment0 == channel + 2 || 728 center_segment0 == channel - 2 || 729 center_segment0 == channel - 6) 730 data->center_freq1 = 5000 + center_segment0 * 5; 731 else { 732 wpa_printf(MSG_ERROR, 733 "Wrong coupling between HT and VHT/HE channel setting"); 734 return -1; 735 } 736 } 737 break; 738 case CONF_OPER_CHWIDTH_160MHZ: 739 data->bandwidth = 160; 740 if (center_segment1) { 741 wpa_printf(MSG_ERROR, 742 "160 MHz: center segment 1 should not be set"); 743 return -1; 744 } 745 if (!sec_channel_offset && 746 oper_chwidth_legacy != CONF_OPER_CHWIDTH_USE_HT) { 747 wpa_printf(MSG_ERROR, 748 "160 MHz: second channel offset not set"); 749 return -1; 750 } 751 /* 752 * Note: HT/VHT config and params are coupled. Check if 753 * HT40 channel band is in VHT160 channel band configuration. 754 */ 755 if (center_segment0 == channel + 14 || 756 center_segment0 == channel + 10 || 757 center_segment0 == channel + 6 || 758 center_segment0 == channel + 2 || 759 center_segment0 == channel - 2 || 760 center_segment0 == channel - 6 || 761 center_segment0 == channel - 10 || 762 center_segment0 == channel - 14) 763 data->center_freq1 = 5000 + center_segment0 * 5; 764 else { 765 wpa_printf(MSG_ERROR, 766 "160 MHz: HT40 channel band is not in 160 MHz band"); 767 return -1; 768 } 769 break; 770 case CONF_OPER_CHWIDTH_320MHZ: 771 data->bandwidth = 320; 772 if (!data->eht_enabled || !is_6ghz_freq(freq)) { 773 wpa_printf(MSG_ERROR, 774 "320 MHz: EHT not enabled or not a 6 GHz channel"); 775 return -1; 776 } 777 if (center_segment1) { 778 wpa_printf(MSG_ERROR, 779 "320 MHz: center segment 1 should not be set"); 780 return -1; 781 } 782 if (center_segment0 == channel + 30 || 783 center_segment0 == channel + 26 || 784 center_segment0 == channel + 22 || 785 center_segment0 == channel + 18 || 786 center_segment0 == channel + 14 || 787 center_segment0 == channel + 10 || 788 center_segment0 == channel + 6 || 789 center_segment0 == channel + 2 || 790 center_segment0 == channel - 2 || 791 center_segment0 == channel - 6 || 792 center_segment0 == channel - 10 || 793 center_segment0 == channel - 14 || 794 center_segment0 == channel - 18 || 795 center_segment0 == channel - 22 || 796 center_segment0 == channel - 26 || 797 center_segment0 == channel - 30) 798 data->center_freq1 = 5000 + center_segment0 * 5; 799 else { 800 wpa_printf(MSG_ERROR, 801 "320 MHz: wrong center segment 0"); 802 return -1; 803 } 804 break; 805 default: 806 break; 807 } 808 809 return 0; 810 } 811 812 813 void set_disable_ht40(struct ieee80211_ht_capabilities *htcaps, 814 int disabled) 815 { 816 /* Masking these out disables HT40 */ 817 le16 msk = host_to_le16(HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET | 818 HT_CAP_INFO_SHORT_GI40MHZ); 819 820 if (disabled) 821 htcaps->ht_capabilities_info &= ~msk; 822 else 823 htcaps->ht_capabilities_info |= msk; 824 } 825 826 827 #ifdef CONFIG_IEEE80211AC 828 829 static int _ieee80211ac_cap_check(u32 hw, u32 conf, u32 cap, 830 const char *name) 831 { 832 u32 req_cap = conf & cap; 833 834 /* 835 * Make sure we support all requested capabilities. 836 * NOTE: We assume that 'cap' represents a capability mask, 837 * not a discrete value. 838 */ 839 if ((hw & req_cap) != req_cap) { 840 wpa_printf(MSG_ERROR, 841 "Driver does not support configured VHT capability [%s]", 842 name); 843 return 0; 844 } 845 return 1; 846 } 847 848 849 static int ieee80211ac_cap_check_max(u32 hw, u32 conf, u32 mask, 850 unsigned int shift, 851 const char *name) 852 { 853 u32 hw_max = hw & mask; 854 u32 conf_val = conf & mask; 855 856 if (conf_val > hw_max) { 857 wpa_printf(MSG_ERROR, 858 "Configured VHT capability [%s] exceeds max value supported by the driver (%d > %d)", 859 name, conf_val >> shift, hw_max >> shift); 860 return 0; 861 } 862 return 1; 863 } 864 865 866 int ieee80211ac_cap_check(u32 hw, u32 conf) 867 { 868 #define VHT_CAP_CHECK(cap) \ 869 do { \ 870 if (!_ieee80211ac_cap_check(hw, conf, cap, #cap)) \ 871 return 0; \ 872 } while (0) 873 874 #define VHT_CAP_CHECK_MAX(cap) \ 875 do { \ 876 if (!ieee80211ac_cap_check_max(hw, conf, cap, cap ## _SHIFT, \ 877 #cap)) \ 878 return 0; \ 879 } while (0) 880 881 VHT_CAP_CHECK_MAX(VHT_CAP_MAX_MPDU_LENGTH_MASK); 882 VHT_CAP_CHECK_MAX(VHT_CAP_SUPP_CHAN_WIDTH_MASK); 883 VHT_CAP_CHECK(VHT_CAP_RXLDPC); 884 VHT_CAP_CHECK(VHT_CAP_SHORT_GI_80); 885 VHT_CAP_CHECK(VHT_CAP_SHORT_GI_160); 886 VHT_CAP_CHECK(VHT_CAP_TXSTBC); 887 VHT_CAP_CHECK_MAX(VHT_CAP_RXSTBC_MASK); 888 VHT_CAP_CHECK(VHT_CAP_SU_BEAMFORMER_CAPABLE); 889 VHT_CAP_CHECK(VHT_CAP_SU_BEAMFORMEE_CAPABLE); 890 VHT_CAP_CHECK_MAX(VHT_CAP_BEAMFORMEE_STS_MAX); 891 VHT_CAP_CHECK_MAX(VHT_CAP_SOUNDING_DIMENSION_MAX); 892 VHT_CAP_CHECK(VHT_CAP_MU_BEAMFORMER_CAPABLE); 893 VHT_CAP_CHECK(VHT_CAP_MU_BEAMFORMEE_CAPABLE); 894 VHT_CAP_CHECK(VHT_CAP_VHT_TXOP_PS); 895 VHT_CAP_CHECK(VHT_CAP_HTC_VHT); 896 VHT_CAP_CHECK_MAX(VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MAX); 897 VHT_CAP_CHECK(VHT_CAP_VHT_LINK_ADAPTATION_VHT_UNSOL_MFB); 898 VHT_CAP_CHECK(VHT_CAP_VHT_LINK_ADAPTATION_VHT_MRQ_MFB); 899 VHT_CAP_CHECK(VHT_CAP_RX_ANTENNA_PATTERN); 900 VHT_CAP_CHECK(VHT_CAP_TX_ANTENNA_PATTERN); 901 902 #undef VHT_CAP_CHECK 903 #undef VHT_CAP_CHECK_MAX 904 905 return 1; 906 } 907 908 #endif /* CONFIG_IEEE80211AC */ 909 910 911 u32 num_chan_to_bw(int num_chans) 912 { 913 switch (num_chans) { 914 case 2: 915 case 4: 916 case 8: 917 case 16: 918 return num_chans * 20; 919 default: 920 return 20; 921 } 922 } 923 924 925 /* check if BW is applicable for channel */ 926 int chan_bw_allowed(const struct hostapd_channel_data *chan, u32 bw, 927 int ht40_plus, int pri) 928 { 929 u32 bw_mask; 930 931 switch (bw) { 932 case 20: 933 bw_mask = HOSTAPD_CHAN_WIDTH_20; 934 break; 935 case 40: 936 /* HT 40 MHz support declared only for primary channel, 937 * just skip 40 MHz secondary checking */ 938 if (pri && ht40_plus) 939 bw_mask = HOSTAPD_CHAN_WIDTH_40P; 940 else if (pri && !ht40_plus) 941 bw_mask = HOSTAPD_CHAN_WIDTH_40M; 942 else 943 bw_mask = 0; 944 break; 945 case 80: 946 bw_mask = HOSTAPD_CHAN_WIDTH_80; 947 break; 948 case 160: 949 bw_mask = HOSTAPD_CHAN_WIDTH_160; 950 break; 951 case 320: 952 bw_mask = HOSTAPD_CHAN_WIDTH_320; 953 break; 954 default: 955 bw_mask = 0; 956 break; 957 } 958 959 return (chan->allowed_bw & bw_mask) == bw_mask; 960 } 961 962 963 /* check if channel is allowed to be used as primary */ 964 int chan_pri_allowed(const struct hostapd_channel_data *chan) 965 { 966 return !(chan->flag & HOSTAPD_CHAN_DISABLED) && 967 (chan->allowed_bw & HOSTAPD_CHAN_WIDTH_20); 968 } 969 970 971 /* IEEE P802.11be/D3.0, Table 36-30 - Definition of the Punctured Channel 972 * Information field in the U-SIG for an EHT MU PPDU using non-OFDMA 973 * transmissions */ 974 static const u16 punct_bitmap_80[] = { 0xF, 0xE, 0xD, 0xB, 0x7 }; 975 static const u16 punct_bitmap_160[] = { 976 0xFF, 0xFE, 0xFD, 0xFB, 0xF7, 0xEF, 0xDF, 0xBF, 977 0x7F, 0xFC, 0xF3, 0xCF, 0x3F 978 }; 979 static const u16 punct_bitmap_320[] = { 980 0xFFFF, 0xFFFC, 0xFFF3, 0xFFCF, 0xFF3F, 0xFCFF, 0xF3FF, 0xCFFF, 981 0x3FFF, 0xFFF0, 0xFF0F, 0xF0FF, 0x0FFF, 0xFFC0, 0xFF30, 0xFCF0, 982 0xF3F0, 0xCFF0, 0x3FF0, 0x0FFC, 0x0FF3, 0x0FCF, 0x0F3F, 0x0CFF, 983 0x03FF 984 }; 985 986 987 bool is_punct_bitmap_valid(u16 bw, u16 pri_ch_bit_pos, u16 punct_bitmap) 988 { 989 u8 i, count; 990 u16 bitmap; 991 const u16 *valid_bitmaps; 992 993 if (!punct_bitmap) /* All channels active */ 994 return true; 995 996 bitmap = ~punct_bitmap; 997 998 switch (bw) { 999 case 80: 1000 bitmap &= 0xF; 1001 valid_bitmaps = punct_bitmap_80; 1002 count = ARRAY_SIZE(punct_bitmap_80); 1003 break; 1004 1005 case 160: 1006 bitmap &= 0xFF; 1007 valid_bitmaps = punct_bitmap_160; 1008 count = ARRAY_SIZE(punct_bitmap_160); 1009 break; 1010 1011 case 320: 1012 bitmap &= 0xFFFF; 1013 valid_bitmaps = punct_bitmap_320; 1014 count = ARRAY_SIZE(punct_bitmap_320); 1015 break; 1016 1017 default: 1018 return false; 1019 } 1020 1021 if (!bitmap) /* No channel active */ 1022 return false; 1023 1024 if (!(bitmap & BIT(pri_ch_bit_pos))) { 1025 wpa_printf(MSG_DEBUG, "Primary channel cannot be punctured"); 1026 return false; 1027 } 1028 1029 for (i = 0; i < count; i++) { 1030 if (valid_bitmaps[i] == bitmap) 1031 return true; 1032 } 1033 1034 return false; 1035 } 1036
Indexes created Wed Jun 24 00:24:50 UTC 2026