1 /* 2 * Copyright (c) 2017-2020 The Linux Foundation. All rights reserved. 3 * 4 * Permission to use, copy, modify, and/or distribute this software for 5 * any purpose with or without fee is hereby granted, provided that the 6 * above copyright notice and this permission notice appear in all 7 * copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL 10 * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED 11 * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE 12 * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 13 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 14 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER 15 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 16 * PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 /* 20 * DOC: Defines scan utility functions 21 */ 22 23 #include <wlan_cmn.h> 24 #include <wlan_scan_ucfg_api.h> 25 #include <wlan_scan_utils_api.h> 26 #include <../../core/src/wlan_scan_cache_db.h> 27 #include <../../core/src/wlan_scan_main.h> 28 #include <wlan_reg_services_api.h> 29 30 #define MAX_IE_LEN 1024 31 #define SHORT_SSID_LEN 4 32 #define NEIGHBOR_AP_LEN 1 33 #define BSS_PARAMS_LEN 1 34 35 const char* 36 util_scan_get_ev_type_name(enum scan_event_type type) 37 { 38 static const char * const event_name[] = { 39 [SCAN_EVENT_TYPE_STARTED] = "STARTED", 40 [SCAN_EVENT_TYPE_COMPLETED] = "COMPLETED", 41 [SCAN_EVENT_TYPE_BSS_CHANNEL] = "HOME_CHANNEL", 42 [SCAN_EVENT_TYPE_FOREIGN_CHANNEL] = "FOREIGN_CHANNEL", 43 [SCAN_EVENT_TYPE_DEQUEUED] = "DEQUEUED", 44 [SCAN_EVENT_TYPE_PREEMPTED] = "PREEMPTED", 45 [SCAN_EVENT_TYPE_START_FAILED] = "START_FAILED", 46 [SCAN_EVENT_TYPE_RESTARTED] = "RESTARTED", 47 [SCAN_EVENT_TYPE_FOREIGN_CHANNEL_EXIT] = "FOREIGN_CHANNEL_EXIT", 48 [SCAN_EVENT_TYPE_SUSPENDED] = "SUSPENDED", 49 [SCAN_EVENT_TYPE_RESUMED] = "RESUMED", 50 [SCAN_EVENT_TYPE_NLO_COMPLETE] = "NLO_COMPLETE", 51 [SCAN_EVENT_TYPE_NLO_MATCH] = "NLO_MATCH", 52 [SCAN_EVENT_TYPE_INVALID] = "INVALID", 53 [SCAN_EVENT_TYPE_GPIO_TIMEOUT] = "GPIO_TIMEOUT", 54 [SCAN_EVENT_TYPE_RADIO_MEASUREMENT_START] = 55 "RADIO_MEASUREMENT_START", 56 [SCAN_EVENT_TYPE_RADIO_MEASUREMENT_END] = 57 "RADIO_MEASUREMENT_END", 58 [SCAN_EVENT_TYPE_BSSID_MATCH] = "BSSID_MATCH", 59 [SCAN_EVENT_TYPE_FOREIGN_CHANNEL_GET_NF] = 60 "FOREIGN_CHANNEL_GET_NF", 61 }; 62 63 if (type >= SCAN_EVENT_TYPE_MAX) 64 return "UNKNOWN"; 65 66 return event_name[type]; 67 } 68 69 70 const char* 71 util_scan_get_ev_reason_name(enum scan_completion_reason reason) 72 { 73 static const char * const reason_name[] = { 74 [SCAN_REASON_NONE] = "NONE", 75 [SCAN_REASON_COMPLETED] = "COMPLETED", 76 [SCAN_REASON_CANCELLED] = "CANCELLED", 77 [SCAN_REASON_PREEMPTED] = "PREEMPTED", 78 [SCAN_REASON_TIMEDOUT] = "TIMEDOUT", 79 [SCAN_REASON_INTERNAL_FAILURE] = "INTERNAL_FAILURE", 80 [SCAN_REASON_SUSPENDED] = "SUSPENDED", 81 [SCAN_REASON_RUN_FAILED] = "RUN_FAILED", 82 [SCAN_REASON_TERMINATION_FUNCTION] = "TERMINATION_FUNCTION", 83 [SCAN_REASON_MAX_OFFCHAN_RETRIES] = "MAX_OFFCHAN_RETRIES", 84 [SCAN_REASON_DFS_VIOLATION] = "DFS_NOL_VIOLATION", 85 }; 86 87 if (reason >= SCAN_REASON_MAX) 88 return "UNKNOWN"; 89 90 return reason_name[reason]; 91 } 92 93 qdf_time_t 94 util_get_last_scan_time(struct wlan_objmgr_vdev *vdev) 95 { 96 uint8_t pdev_id; 97 struct wlan_scan_obj *scan_obj; 98 99 if (!vdev) { 100 scm_warn("null vdev"); 101 QDF_ASSERT(0); 102 return 0; 103 } 104 pdev_id = wlan_scan_vdev_get_pdev_id(vdev); 105 scan_obj = wlan_vdev_get_scan_obj(vdev); 106 107 if (scan_obj) 108 return scan_obj->pdev_info[pdev_id].last_scan_time; 109 else 110 return 0; 111 } 112 113 enum wlan_band util_scan_scm_chan_to_band(uint32_t chan) 114 { 115 if (WLAN_CHAN_IS_2GHZ(chan)) 116 return WLAN_BAND_2_4_GHZ; 117 118 return WLAN_BAND_5_GHZ; 119 } 120 121 enum wlan_band util_scan_scm_freq_to_band(uint16_t freq) 122 { 123 if (WLAN_REG_IS_24GHZ_CH_FREQ(freq)) 124 return WLAN_BAND_2_4_GHZ; 125 126 return WLAN_BAND_5_GHZ; 127 } 128 129 bool util_is_scan_entry_match( 130 struct scan_cache_entry *entry1, 131 struct scan_cache_entry *entry2) 132 { 133 134 if (entry1->cap_info.wlan_caps.ess != 135 entry2->cap_info.wlan_caps.ess) 136 return false; 137 138 if (entry1->cap_info.wlan_caps.ess && 139 !qdf_mem_cmp(entry1->bssid.bytes, 140 entry2->bssid.bytes, QDF_MAC_ADDR_SIZE)) { 141 /* Check for BSS */ 142 if (util_is_ssid_match(&entry1->ssid, &entry2->ssid) || 143 util_scan_is_null_ssid(&entry1->ssid) || 144 util_scan_is_null_ssid(&entry2->ssid)) 145 return true; 146 } else if (entry1->cap_info.wlan_caps.ibss && 147 (entry1->channel.chan_freq == 148 entry2->channel.chan_freq)) { 149 /* 150 * Same channel cannot have same SSID for 151 * different IBSS, so no need to check BSSID 152 */ 153 if (util_is_ssid_match( 154 &entry1->ssid, &entry2->ssid)) 155 return true; 156 } else if (!entry1->cap_info.wlan_caps.ibss && 157 !entry1->cap_info.wlan_caps.ess && 158 !qdf_mem_cmp(entry1->bssid.bytes, 159 entry2->bssid.bytes, QDF_MAC_ADDR_SIZE)) { 160 /* In case of P2P devices, ess and ibss will be set to zero */ 161 return true; 162 } 163 164 return false; 165 } 166 167 static bool util_is_pureg_rate(uint8_t *rates, uint8_t nrates) 168 { 169 static const uint8_t g_rates[] = {12, 18, 24, 36, 48, 72, 96, 108}; 170 bool pureg = false; 171 uint8_t i, j; 172 173 for (i = 0; i < nrates; i++) { 174 for (j = 0; j < QDF_ARRAY_SIZE(g_rates); j++) { 175 if (WLAN_RV(rates[i]) == g_rates[j]) { 176 pureg = true; 177 break; 178 } 179 } 180 if (pureg) 181 break; 182 } 183 184 return pureg; 185 } 186 187 #ifdef CONFIG_BAND_6GHZ 188 static struct he_oper_6g_param *util_scan_get_he_6g_params(uint8_t *he_ops) 189 { 190 uint8_t len; 191 uint32_t he_oper_params; 192 193 if (!he_ops) 194 return NULL; 195 196 len = he_ops[1]; 197 he_ops += sizeof(struct ie_header); 198 199 if (len < WLAN_HEOP_FIXED_PARAM_LENGTH) 200 return NULL; 201 202 /* element id extension */ 203 he_ops++; 204 len--; 205 206 he_oper_params = LE_READ_4(he_ops); 207 if (!(he_oper_params & WLAN_HEOP_6GHZ_INFO_PRESENT_MASK)) 208 return NULL; 209 210 /* fixed params - element id extension */ 211 he_ops += WLAN_HEOP_FIXED_PARAM_LENGTH - 1; 212 len -= WLAN_HEOP_FIXED_PARAM_LENGTH - 1; 213 214 if (!len) 215 return NULL; 216 217 /* vht oper params */ 218 if (he_oper_params & WLAN_HEOP_VHTOP_PRESENT_MASK) { 219 if (len < WLAN_HEOP_VHTOP_LENGTH) 220 return NULL; 221 he_ops += WLAN_HEOP_VHTOP_LENGTH; 222 len -= WLAN_HEOP_VHTOP_LENGTH; 223 } 224 225 if (!len) 226 return NULL; 227 228 if (he_oper_params & WLAN_HEOP_CO_LOCATED_BSS_MASK) { 229 he_ops += WLAN_HEOP_CO_LOCATED_BSS_LENGTH; 230 len -= WLAN_HEOP_CO_LOCATED_BSS_LENGTH; 231 } 232 233 if (len < sizeof(struct he_oper_6g_param)) 234 return NULL; 235 236 return (struct he_oper_6g_param *)he_ops; 237 } 238 239 static QDF_STATUS 240 util_scan_get_chan_from_he_6g_params(struct wlan_objmgr_pdev *pdev, 241 struct scan_cache_entry *scan_params, 242 qdf_freq_t *chan_freq, 243 bool *he_6g_dup_bcon, uint8_t band_mask) 244 { 245 struct he_oper_6g_param *he_6g_params; 246 uint8_t *he_ops; 247 struct wlan_scan_obj *scan_obj; 248 struct wlan_objmgr_psoc *psoc; 249 250 psoc = wlan_pdev_get_psoc(pdev); 251 if (!psoc) { 252 scm_err("psoc is NULL"); 253 return QDF_STATUS_E_INVAL; 254 } 255 256 scan_obj = wlan_psoc_get_scan_obj(psoc); 257 if (!scan_obj) { 258 scm_err("scan_obj is NULL"); 259 return QDF_STATUS_E_INVAL; 260 } 261 262 *he_6g_dup_bcon = false; 263 264 he_ops = util_scan_entry_heop(scan_params); 265 if (!util_scan_entry_hecap(scan_params) || !he_ops) 266 return QDF_STATUS_SUCCESS; 267 268 he_6g_params = util_scan_get_he_6g_params(he_ops); 269 if (!he_6g_params) 270 return QDF_STATUS_SUCCESS; 271 272 *chan_freq = wlan_reg_chan_band_to_freq(pdev, 273 he_6g_params->primary_channel, 274 band_mask); 275 if (scan_obj->drop_bcn_on_invalid_freq && 276 wlan_reg_is_disable_for_freq(pdev, *chan_freq)) { 277 scm_debug_rl("%pM: Drop as invalid channel %d freq %d in HE 6Ghz params", 278 scan_params->bssid.bytes, 279 he_6g_params->primary_channel, *chan_freq); 280 return QDF_STATUS_E_INVAL; 281 } 282 *he_6g_dup_bcon = he_6g_params->duplicate_beacon ? true : false; 283 284 return QDF_STATUS_SUCCESS; 285 } 286 287 static enum wlan_phymode 288 util_scan_get_phymode_6g(struct wlan_objmgr_pdev *pdev, 289 struct scan_cache_entry *scan_params) 290 { 291 struct he_oper_6g_param *he_6g_params; 292 enum wlan_phymode phymode = WLAN_PHYMODE_11AXA_HE20; 293 uint8_t *he_ops; 294 uint8_t band_mask = BIT(REG_BAND_6G); 295 296 he_ops = util_scan_entry_heop(scan_params); 297 if (!util_scan_entry_hecap(scan_params) || !he_ops) 298 return phymode; 299 300 he_6g_params = util_scan_get_he_6g_params(he_ops); 301 if (!he_6g_params) 302 return phymode; 303 304 switch (he_6g_params->width) { 305 case WLAN_HE_6GHZ_CHWIDTH_20: 306 phymode = WLAN_PHYMODE_11AXA_HE20; 307 break; 308 case WLAN_HE_6GHZ_CHWIDTH_40: 309 phymode = WLAN_PHYMODE_11AXA_HE40; 310 break; 311 case WLAN_HE_6GHZ_CHWIDTH_80: 312 phymode = WLAN_PHYMODE_11AXA_HE80; 313 break; 314 case WLAN_HE_6GHZ_CHWIDTH_160_80_80: 315 if (WLAN_IS_HE80_80(he_6g_params)) 316 phymode = WLAN_PHYMODE_11AXA_HE80_80; 317 else if (WLAN_IS_HE160(he_6g_params)) 318 phymode = WLAN_PHYMODE_11AXA_HE160; 319 else 320 phymode = WLAN_PHYMODE_11AXA_HE80; 321 break; 322 default: 323 scm_err("Invalid he_6g_params width: %d", he_6g_params->width); 324 phymode = WLAN_PHYMODE_11AXA_HE20; 325 break; 326 } 327 328 if (he_6g_params->chan_freq_seg0) 329 scan_params->channel.cfreq0 = 330 wlan_reg_chan_band_to_freq(pdev, 331 he_6g_params->chan_freq_seg0, 332 band_mask); 333 if (he_6g_params->chan_freq_seg1) 334 scan_params->channel.cfreq1 = 335 wlan_reg_chan_band_to_freq(pdev, 336 he_6g_params->chan_freq_seg1, 337 band_mask); 338 339 return phymode; 340 } 341 #else 342 static QDF_STATUS 343 util_scan_get_chan_from_he_6g_params(struct wlan_objmgr_pdev *pdev, 344 struct scan_cache_entry *scan_params, 345 qdf_freq_t *chan_freq, 346 bool *he_6g_dup_bcon, 347 uint8_t band_mask) 348 { 349 return QDF_STATUS_SUCCESS; 350 } 351 static inline enum wlan_phymode 352 util_scan_get_phymode_6g(struct wlan_objmgr_pdev *pdev, 353 struct scan_cache_entry *scan_params) 354 { 355 return WLAN_PHYMODE_AUTO; 356 } 357 #endif 358 359 static inline 360 uint32_t util_scan_sec_chan_freq_from_htinfo(struct wlan_ie_htinfo_cmn *htinfo, 361 uint32_t primary_chan_freq) 362 { 363 if (htinfo->hi_extchoff == WLAN_HTINFO_EXTOFFSET_ABOVE) 364 return primary_chan_freq + WLAN_CHAN_SPACING_20MHZ; 365 else if (htinfo->hi_extchoff == WLAN_HTINFO_EXTOFFSET_BELOW) 366 return primary_chan_freq - WLAN_CHAN_SPACING_20MHZ; 367 368 return 0; 369 } 370 371 static enum wlan_phymode 372 util_scan_get_phymode_5g(struct wlan_objmgr_pdev *pdev, 373 struct scan_cache_entry *scan_params) 374 { 375 enum wlan_phymode phymode = WLAN_PHYMODE_AUTO; 376 uint16_t ht_cap = 0; 377 struct htcap_cmn_ie *htcap; 378 struct wlan_ie_htinfo_cmn *htinfo; 379 struct wlan_ie_vhtop *vhtop; 380 uint8_t band_mask = BIT(REG_BAND_5G); 381 382 htcap = (struct htcap_cmn_ie *) 383 util_scan_entry_htcap(scan_params); 384 htinfo = (struct wlan_ie_htinfo_cmn *) 385 util_scan_entry_htinfo(scan_params); 386 vhtop = (struct wlan_ie_vhtop *) 387 util_scan_entry_vhtop(scan_params); 388 389 if (!(htcap && htinfo)) 390 return WLAN_PHYMODE_11A; 391 392 if (htcap) 393 ht_cap = le16toh(htcap->hc_cap); 394 395 if (ht_cap & WLAN_HTCAP_C_CHWIDTH40) 396 phymode = WLAN_PHYMODE_11NA_HT40; 397 else 398 phymode = WLAN_PHYMODE_11NA_HT20; 399 400 scan_params->channel.cfreq0 = 401 util_scan_sec_chan_freq_from_htinfo(htinfo, 402 scan_params->channel.chan_freq); 403 404 if (util_scan_entry_vhtcap(scan_params) && vhtop) { 405 switch (vhtop->vht_op_chwidth) { 406 case WLAN_VHTOP_CHWIDTH_2040: 407 if (ht_cap & WLAN_HTCAP_C_CHWIDTH40) 408 phymode = WLAN_PHYMODE_11AC_VHT40; 409 else 410 phymode = WLAN_PHYMODE_11AC_VHT20; 411 break; 412 case WLAN_VHTOP_CHWIDTH_80: 413 if (WLAN_IS_REVSIG_VHT80_80(vhtop)) 414 phymode = WLAN_PHYMODE_11AC_VHT80_80; 415 else if (WLAN_IS_REVSIG_VHT160(vhtop)) 416 phymode = WLAN_PHYMODE_11AC_VHT160; 417 else 418 phymode = WLAN_PHYMODE_11AC_VHT80; 419 break; 420 case WLAN_VHTOP_CHWIDTH_160: 421 phymode = WLAN_PHYMODE_11AC_VHT160; 422 break; 423 case WLAN_VHTOP_CHWIDTH_80_80: 424 phymode = WLAN_PHYMODE_11AC_VHT80_80; 425 break; 426 default: 427 scm_err("bad channel: %d", 428 vhtop->vht_op_chwidth); 429 phymode = WLAN_PHYMODE_11AC_VHT20; 430 break; 431 } 432 if (vhtop->vht_op_ch_freq_seg1) 433 scan_params->channel.cfreq0 = 434 wlan_reg_chan_band_to_freq(pdev, 435 vhtop->vht_op_ch_freq_seg1, 436 band_mask); 437 if (vhtop->vht_op_ch_freq_seg2) 438 scan_params->channel.cfreq1 = 439 wlan_reg_chan_band_to_freq(pdev, 440 vhtop->vht_op_ch_freq_seg2, 441 band_mask); 442 } 443 444 if (!util_scan_entry_hecap(scan_params)) 445 return phymode; 446 447 /* for 5Ghz Check for HE, only if VHT cap and HE cap are present */ 448 if (!IS_WLAN_PHYMODE_VHT(phymode)) 449 return phymode; 450 451 switch (phymode) { 452 case WLAN_PHYMODE_11AC_VHT20: 453 phymode = WLAN_PHYMODE_11AXA_HE20; 454 break; 455 case WLAN_PHYMODE_11AC_VHT40: 456 phymode = WLAN_PHYMODE_11AXA_HE40; 457 break; 458 case WLAN_PHYMODE_11AC_VHT80: 459 phymode = WLAN_PHYMODE_11AXA_HE80; 460 break; 461 case WLAN_PHYMODE_11AC_VHT160: 462 phymode = WLAN_PHYMODE_11AXA_HE160; 463 break; 464 case WLAN_PHYMODE_11AC_VHT80_80: 465 phymode = WLAN_PHYMODE_11AXA_HE80_80; 466 break; 467 default: 468 phymode = WLAN_PHYMODE_11AXA_HE20; 469 break; 470 } 471 472 return phymode; 473 } 474 475 static enum wlan_phymode 476 util_scan_get_phymode_2g(struct scan_cache_entry *scan_params) 477 { 478 enum wlan_phymode phymode = WLAN_PHYMODE_AUTO; 479 uint16_t ht_cap = 0; 480 struct htcap_cmn_ie *htcap; 481 struct wlan_ie_htinfo_cmn *htinfo; 482 struct wlan_ie_vhtop *vhtop; 483 484 htcap = (struct htcap_cmn_ie *) 485 util_scan_entry_htcap(scan_params); 486 htinfo = (struct wlan_ie_htinfo_cmn *) 487 util_scan_entry_htinfo(scan_params); 488 vhtop = (struct wlan_ie_vhtop *) 489 util_scan_entry_vhtop(scan_params); 490 491 if (htcap) 492 ht_cap = le16toh(htcap->hc_cap); 493 494 if (htcap && htinfo) { 495 if ((ht_cap & WLAN_HTCAP_C_CHWIDTH40) && 496 (htinfo->hi_extchoff == WLAN_HTINFO_EXTOFFSET_ABOVE)) 497 phymode = WLAN_PHYMODE_11NG_HT40PLUS; 498 else if ((ht_cap & WLAN_HTCAP_C_CHWIDTH40) && 499 (htinfo->hi_extchoff == WLAN_HTINFO_EXTOFFSET_BELOW)) 500 phymode = WLAN_PHYMODE_11NG_HT40MINUS; 501 else 502 phymode = WLAN_PHYMODE_11NG_HT20; 503 } else if (util_scan_entry_xrates(scan_params)) { 504 /* only 11G stations will have more than 8 rates */ 505 phymode = WLAN_PHYMODE_11G; 506 } else { 507 /* Some mischievous g-only APs do not set extended rates */ 508 if (util_scan_entry_rates(scan_params)) { 509 if (util_is_pureg_rate(&scan_params->ie_list.rates[2], 510 scan_params->ie_list.rates[1])) 511 phymode = WLAN_PHYMODE_11G; 512 else 513 phymode = WLAN_PHYMODE_11B; 514 } else { 515 phymode = WLAN_PHYMODE_11B; 516 } 517 } 518 519 /* Check for VHT only if HT cap is present */ 520 if (!IS_WLAN_PHYMODE_HT(phymode)) 521 return phymode; 522 523 scan_params->channel.cfreq0 = 524 util_scan_sec_chan_freq_from_htinfo(htinfo, 525 scan_params->channel.chan_freq); 526 527 if (util_scan_entry_vhtcap(scan_params) && vhtop) { 528 switch (vhtop->vht_op_chwidth) { 529 case WLAN_VHTOP_CHWIDTH_2040: 530 if (phymode == WLAN_PHYMODE_11NG_HT40PLUS) 531 phymode = WLAN_PHYMODE_11AC_VHT40PLUS_2G; 532 else if (phymode == WLAN_PHYMODE_11NG_HT40MINUS) 533 phymode = WLAN_PHYMODE_11AC_VHT40MINUS_2G; 534 else 535 phymode = WLAN_PHYMODE_11AC_VHT20_2G; 536 537 break; 538 default: 539 scm_info("bad vht_op_chwidth: %d", 540 vhtop->vht_op_chwidth); 541 phymode = WLAN_PHYMODE_11AC_VHT20_2G; 542 break; 543 } 544 } 545 546 if (!util_scan_entry_hecap(scan_params)) 547 return phymode; 548 549 if (phymode == WLAN_PHYMODE_11AC_VHT40PLUS_2G || 550 phymode == WLAN_PHYMODE_11NG_HT40PLUS) 551 phymode = WLAN_PHYMODE_11AXG_HE40PLUS; 552 else if (phymode == WLAN_PHYMODE_11AC_VHT40MINUS_2G || 553 phymode == WLAN_PHYMODE_11NG_HT40MINUS) 554 phymode = WLAN_PHYMODE_11AXG_HE40MINUS; 555 else 556 phymode = WLAN_PHYMODE_11AXG_HE20; 557 558 return phymode; 559 } 560 561 static enum wlan_phymode 562 util_scan_get_phymode(struct wlan_objmgr_pdev *pdev, 563 struct scan_cache_entry *scan_params) 564 { 565 if (WLAN_REG_IS_24GHZ_CH_FREQ(scan_params->channel.chan_freq)) 566 return util_scan_get_phymode_2g(scan_params); 567 else if (WLAN_REG_IS_6GHZ_CHAN_FREQ(scan_params->channel.chan_freq)) 568 return util_scan_get_phymode_6g(pdev, scan_params); 569 else 570 return util_scan_get_phymode_5g(pdev, scan_params); 571 } 572 573 static QDF_STATUS 574 util_scan_parse_chan_switch_wrapper_ie(struct scan_cache_entry *scan_params, 575 struct ie_header *sub_ie, qdf_size_t sub_ie_len) 576 { 577 /* Walk through to check nothing is malformed */ 578 while (sub_ie_len >= sizeof(struct ie_header)) { 579 /* At least one more header is present */ 580 sub_ie_len -= sizeof(struct ie_header); 581 582 if (sub_ie->ie_len == 0) { 583 sub_ie += 1; 584 continue; 585 } 586 if (sub_ie_len < sub_ie->ie_len) { 587 scm_err("Incomplete corrupted IE:%x", 588 WLAN_ELEMID_CHAN_SWITCH_WRAP); 589 return QDF_STATUS_E_INVAL; 590 } 591 switch (sub_ie->ie_id) { 592 case WLAN_ELEMID_COUNTRY: 593 scan_params->ie_list.country = (uint8_t *)sub_ie; 594 break; 595 case WLAN_ELEMID_WIDE_BAND_CHAN_SWITCH: 596 scan_params->ie_list.widebw = (uint8_t *)sub_ie; 597 break; 598 case WLAN_ELEMID_VHT_TX_PWR_ENVLP: 599 scan_params->ie_list.txpwrenvlp = (uint8_t *)sub_ie; 600 break; 601 } 602 /* Consume sub info element */ 603 sub_ie_len -= sub_ie->ie_len; 604 /* go to next Sub IE */ 605 sub_ie = (struct ie_header *) 606 (((uint8_t *) sub_ie) + 607 sizeof(struct ie_header) + sub_ie->ie_len); 608 } 609 610 return QDF_STATUS_SUCCESS; 611 } 612 613 bool 614 util_scan_is_hidden_ssid(struct ie_ssid *ssid) 615 { 616 uint8_t i; 617 618 /* 619 * We flag this as Hidden SSID if the Length is 0 620 * of the SSID only contains 0's 621 */ 622 if (!ssid || !ssid->ssid_len) 623 return true; 624 625 for (i = 0; i < ssid->ssid_len; i++) 626 if (ssid->ssid[i] != 0) 627 return false; 628 629 /* All 0's */ 630 return true; 631 } 632 633 static QDF_STATUS 634 util_scan_update_rnr(struct rnr_bss_info *rnr, 635 struct neighbor_ap_info_field *ap_info, 636 uint8_t *data) 637 { 638 uint8_t tbtt_info_length; 639 640 tbtt_info_length = ap_info->tbtt_header.tbtt_info_length; 641 642 switch (tbtt_info_length) { 643 case TBTT_NEIGHBOR_AP_OFFSET_ONLY: 644 /* Dont store it skip*/ 645 break; 646 647 case TBTT_NEIGHBOR_AP_BSS_PARAM: 648 /* Dont store it skip*/ 649 break; 650 651 case TBTT_NEIGHBOR_AP_SHORTSSID: 652 rnr->channel_number = ap_info->channel_number; 653 rnr->operating_class = ap_info->operting_class; 654 qdf_mem_copy(&rnr->short_ssid, &data[1], SHORT_SSID_LEN); 655 break; 656 657 case TBTT_NEIGHBOR_AP_S_SSID_BSS_PARAM: 658 rnr->channel_number = ap_info->channel_number; 659 rnr->operating_class = ap_info->operting_class; 660 qdf_mem_copy(&rnr->short_ssid, &data[1], SHORT_SSID_LEN); 661 rnr->bss_params = data[5]; 662 break; 663 664 case TBTT_NEIGHBOR_AP_BSSID: 665 rnr->channel_number = ap_info->channel_number; 666 rnr->operating_class = ap_info->operting_class; 667 qdf_mem_copy(&rnr->bssid, &data[1], QDF_MAC_ADDR_SIZE); 668 break; 669 670 case TBTT_NEIGHBOR_AP_BSSID_BSS_PARAM: 671 rnr->channel_number = ap_info->channel_number; 672 rnr->operating_class = ap_info->operting_class; 673 qdf_mem_copy(&rnr->bssid, &data[1], QDF_MAC_ADDR_SIZE); 674 rnr->bss_params = data[7]; 675 break; 676 677 case TBTT_NEIGHBOR_AP_BSSID_BSS_PARAM_20MHZ_PSD: 678 rnr->channel_number = ap_info->channel_number; 679 rnr->operating_class = ap_info->operting_class; 680 qdf_mem_copy(&rnr->bssid, &data[1], QDF_MAC_ADDR_SIZE); 681 rnr->bss_params = data[7]; 682 rnr->psd_20mhz = data[8]; 683 break; 684 685 case TBTT_NEIGHBOR_AP_BSSSID_S_SSID: 686 rnr->channel_number = ap_info->channel_number; 687 rnr->operating_class = ap_info->operting_class; 688 qdf_mem_copy(&rnr->bssid, &data[1], QDF_MAC_ADDR_SIZE); 689 qdf_mem_copy(&rnr->short_ssid, &data[7], SHORT_SSID_LEN); 690 break; 691 692 case TBTT_NEIGHBOR_AP_BSSID_S_SSID_BSS_PARAM: 693 rnr->channel_number = ap_info->channel_number; 694 rnr->operating_class = ap_info->operting_class; 695 qdf_mem_copy(&rnr->bssid, &data[1], QDF_MAC_ADDR_SIZE); 696 qdf_mem_copy(&rnr->short_ssid, &data[7], SHORT_SSID_LEN); 697 rnr->bss_params = data[11]; 698 break; 699 700 case TBTT_NEIGHBOR_AP_BSSID_S_SSID_BSS_PARAM_20MHZ_PSD: 701 rnr->channel_number = ap_info->channel_number; 702 rnr->operating_class = ap_info->operting_class; 703 qdf_mem_copy(&rnr->bssid, &data[1], QDF_MAC_ADDR_SIZE); 704 qdf_mem_copy(&rnr->short_ssid, &data[7], SHORT_SSID_LEN); 705 rnr->bss_params = data[11]; 706 rnr->psd_20mhz = data[12]; 707 break; 708 709 default: 710 scm_debug("Wrong fieldtype"); 711 } 712 713 return QDF_STATUS_SUCCESS; 714 } 715 716 static QDF_STATUS 717 util_scan_parse_rnr_ie(struct scan_cache_entry *scan_entry, 718 struct ie_header *ie) 719 { 720 uint32_t rnr_ie_len; 721 uint16_t tbtt_count, tbtt_length, i, fieldtype; 722 uint8_t *data; 723 struct neighbor_ap_info_field *neighbor_ap_info; 724 725 rnr_ie_len = ie->ie_len; 726 data = (uint8_t *)ie + sizeof(struct ie_header); 727 728 while (data < ((uint8_t *)ie + rnr_ie_len + 2)) { 729 neighbor_ap_info = (struct neighbor_ap_info_field *)data; 730 tbtt_count = neighbor_ap_info->tbtt_header.tbtt_info_count; 731 tbtt_length = neighbor_ap_info->tbtt_header.tbtt_info_length; 732 fieldtype = neighbor_ap_info->tbtt_header.tbbt_info_fieldtype; 733 scm_debug("channel number %d, op class %d", 734 neighbor_ap_info->channel_number, 735 neighbor_ap_info->operting_class); 736 scm_debug("tbtt_count %d, tbtt_length %d, fieldtype %d", 737 tbtt_count, tbtt_length, fieldtype); 738 data += sizeof(struct neighbor_ap_info_field); 739 for (i = 0; i < (tbtt_count + 1) ; i++) { 740 if (i < MAX_RNR_BSS) 741 util_scan_update_rnr( 742 &scan_entry->rnr.bss_info[i], 743 neighbor_ap_info, 744 data); 745 data += tbtt_length; 746 } 747 } 748 749 return QDF_STATUS_SUCCESS; 750 } 751 752 static QDF_STATUS 753 util_scan_parse_extn_ie(struct scan_cache_entry *scan_params, 754 struct ie_header *ie) 755 { 756 struct extn_ie_header *extn_ie = (struct extn_ie_header *) ie; 757 758 switch (extn_ie->ie_extn_id) { 759 case WLAN_EXTN_ELEMID_MAX_CHAN_SWITCH_TIME: 760 scan_params->ie_list.mcst = (uint8_t *)ie; 761 break; 762 case WLAN_EXTN_ELEMID_SRP: 763 scan_params->ie_list.srp = (uint8_t *)ie; 764 break; 765 case WLAN_EXTN_ELEMID_HECAP: 766 scan_params->ie_list.hecap = (uint8_t *)ie; 767 break; 768 case WLAN_EXTN_ELEMID_HEOP: 769 scan_params->ie_list.heop = (uint8_t *)ie; 770 break; 771 case WLAN_EXTN_ELEMID_ESP: 772 scan_params->ie_list.esp = (uint8_t *)ie; 773 break; 774 case WLAN_EXTN_ELEMID_MUEDCA: 775 scan_params->ie_list.muedca = (uint8_t *)ie; 776 break; 777 case WLAN_EXTN_ELEMID_HE_6G_CAP: 778 scan_params->ie_list.hecap_6g = (uint8_t *)ie; 779 break; 780 default: 781 break; 782 } 783 return QDF_STATUS_SUCCESS; 784 } 785 786 static QDF_STATUS 787 util_scan_parse_vendor_ie(struct scan_cache_entry *scan_params, 788 struct ie_header *ie) 789 { 790 if (!scan_params->ie_list.vendor) 791 scan_params->ie_list.vendor = (uint8_t *)ie; 792 793 if (is_wpa_oui((uint8_t *)ie)) { 794 scan_params->ie_list.wpa = (uint8_t *)ie; 795 } else if (is_wps_oui((uint8_t *)ie)) { 796 scan_params->ie_list.wps = (uint8_t *)ie; 797 /* WCN IE should be a subset of WPS IE */ 798 if (is_wcn_oui((uint8_t *)ie)) 799 scan_params->ie_list.wcn = (uint8_t *)ie; 800 } else if (is_wme_param((uint8_t *)ie)) { 801 scan_params->ie_list.wmeparam = (uint8_t *)ie; 802 } else if (is_wme_info((uint8_t *)ie)) { 803 scan_params->ie_list.wmeinfo = (uint8_t *)ie; 804 } else if (is_atheros_oui((uint8_t *)ie)) { 805 scan_params->ie_list.athcaps = (uint8_t *)ie; 806 } else if (is_atheros_extcap_oui((uint8_t *)ie)) { 807 scan_params->ie_list.athextcaps = (uint8_t *)ie; 808 } else if (is_sfa_oui((uint8_t *)ie)) { 809 scan_params->ie_list.sfa = (uint8_t *)ie; 810 } else if (is_p2p_oui((uint8_t *)ie)) { 811 scan_params->ie_list.p2p = (uint8_t *)ie; 812 } else if (is_qca_son_oui((uint8_t *)ie, 813 QCA_OUI_WHC_AP_INFO_SUBTYPE)) { 814 scan_params->ie_list.sonadv = (uint8_t *)ie; 815 } else if (is_ht_cap((uint8_t *)ie)) { 816 /* we only care if there isn't already an HT IE (ANA) */ 817 if (!scan_params->ie_list.htcap) { 818 if (ie->ie_len != (WLAN_VENDOR_HT_IE_OFFSET_LEN + 819 sizeof(struct htcap_cmn_ie))) 820 return QDF_STATUS_E_INVAL; 821 scan_params->ie_list.htcap = 822 (uint8_t *)&(((struct wlan_vendor_ie_htcap *)ie)->ie); 823 } 824 } else if (is_ht_info((uint8_t *)ie)) { 825 /* we only care if there isn't already an HT IE (ANA) */ 826 if (!scan_params->ie_list.htinfo) { 827 if (ie->ie_len != WLAN_VENDOR_HT_IE_OFFSET_LEN + 828 sizeof(struct wlan_ie_htinfo_cmn)) 829 return QDF_STATUS_E_INVAL; 830 scan_params->ie_list.htinfo = 831 (uint8_t *)&(((struct wlan_vendor_ie_htinfo *) 832 ie)->hi_ie); 833 } 834 } else if (is_interop_vht((uint8_t *)ie) && 835 !(scan_params->ie_list.vhtcap)) { 836 uint8_t *vendor_ie = (uint8_t *)(ie); 837 838 if (ie->ie_len < ((WLAN_VENDOR_VHTCAP_IE_OFFSET + 839 sizeof(struct wlan_ie_vhtcaps)) - 840 sizeof(struct ie_header))) 841 return QDF_STATUS_E_INVAL; 842 vendor_ie = ((uint8_t *)(ie)) + WLAN_VENDOR_VHTCAP_IE_OFFSET; 843 if (vendor_ie[1] != (sizeof(struct wlan_ie_vhtcaps)) - 844 sizeof(struct ie_header)) 845 return QDF_STATUS_E_INVAL; 846 /* location where Interop Vht Cap IE and VHT OP IE Present */ 847 scan_params->ie_list.vhtcap = (((uint8_t *)(ie)) + 848 WLAN_VENDOR_VHTCAP_IE_OFFSET); 849 if (ie->ie_len > ((WLAN_VENDOR_VHTCAP_IE_OFFSET + 850 sizeof(struct wlan_ie_vhtcaps)) - 851 sizeof(struct ie_header))) { 852 if (ie->ie_len < ((WLAN_VENDOR_VHTOP_IE_OFFSET + 853 sizeof(struct wlan_ie_vhtop)) - 854 sizeof(struct ie_header))) 855 return QDF_STATUS_E_INVAL; 856 vendor_ie = ((uint8_t *)(ie)) + 857 WLAN_VENDOR_VHTOP_IE_OFFSET; 858 if (vendor_ie[1] != (sizeof(struct wlan_ie_vhtop) - 859 sizeof(struct ie_header))) 860 return QDF_STATUS_E_INVAL; 861 scan_params->ie_list.vhtop = (((uint8_t *)(ie)) + 862 WLAN_VENDOR_VHTOP_IE_OFFSET); 863 } 864 } else if (is_bwnss_oui((uint8_t *)ie)) { 865 /* 866 * Bandwidth-NSS map has sub-type & version. 867 * hence copy data just after version byte 868 */ 869 scan_params->ie_list.bwnss_map = (((uint8_t *)ie) + 8); 870 } else if (is_mbo_oce_oui((uint8_t *)ie)) { 871 scan_params->ie_list.mbo_oce = (uint8_t *)ie; 872 } else if (is_extender_oui((uint8_t *)ie)) { 873 scan_params->ie_list.extender = (uint8_t *)ie; 874 } else if (is_adaptive_11r_oui((uint8_t *)ie)) { 875 if ((ie->ie_len < OUI_LENGTH) || 876 (ie->ie_len > MAX_ADAPTIVE_11R_IE_LEN)) 877 return QDF_STATUS_E_INVAL; 878 879 scan_params->ie_list.adaptive_11r = (uint8_t *)ie + 880 sizeof(struct ie_header); 881 } else if (is_sae_single_pmk_oui((uint8_t *)ie)) { 882 if ((ie->ie_len < OUI_LENGTH) || 883 (ie->ie_len > MAX_SAE_SINGLE_PMK_IE_LEN)) { 884 scm_debug("Invalid sae single pmk OUI"); 885 return QDF_STATUS_E_INVAL; 886 } 887 scan_params->ie_list.single_pmk = (uint8_t *)ie + 888 sizeof(struct ie_header); 889 } 890 return QDF_STATUS_SUCCESS; 891 } 892 893 static QDF_STATUS 894 util_scan_populate_bcn_ie_list(struct wlan_objmgr_pdev *pdev, 895 struct scan_cache_entry *scan_params, 896 qdf_freq_t *chan_freq, uint8_t band_mask) 897 { 898 struct ie_header *ie, *sub_ie; 899 uint32_t ie_len, sub_ie_len; 900 QDF_STATUS status; 901 uint8_t chan_idx; 902 struct wlan_scan_obj *scan_obj; 903 struct wlan_objmgr_psoc *psoc; 904 905 psoc = wlan_pdev_get_psoc(pdev); 906 if (!psoc) { 907 scm_err("psoc is NULL"); 908 return QDF_STATUS_E_INVAL; 909 } 910 911 scan_obj = wlan_psoc_get_scan_obj(psoc); 912 if (!scan_obj) { 913 scm_err("scan_obj is NULL"); 914 return QDF_STATUS_E_INVAL; 915 } 916 917 ie_len = util_scan_entry_ie_len(scan_params); 918 ie = (struct ie_header *) 919 util_scan_entry_ie_data(scan_params); 920 921 while (ie_len >= sizeof(struct ie_header)) { 922 ie_len -= sizeof(struct ie_header); 923 924 if (!ie->ie_len) { 925 ie += 1; 926 continue; 927 } 928 929 if (ie_len < ie->ie_len) { 930 scm_debug("Incomplete corrupted IE:%x", 931 ie->ie_id); 932 return QDF_STATUS_E_INVAL; 933 } 934 935 switch (ie->ie_id) { 936 case WLAN_ELEMID_SSID: 937 if (ie->ie_len > (sizeof(struct ie_ssid) - 938 sizeof(struct ie_header))) 939 goto err; 940 scan_params->ie_list.ssid = (uint8_t *)ie; 941 break; 942 case WLAN_ELEMID_RATES: 943 if (ie->ie_len > WLAN_SUPPORTED_RATES_IE_MAX_LEN) 944 goto err; 945 scan_params->ie_list.rates = (uint8_t *)ie; 946 break; 947 case WLAN_ELEMID_DSPARMS: 948 if (ie->ie_len != WLAN_DS_PARAM_IE_MAX_LEN) 949 return QDF_STATUS_E_INVAL; 950 scan_params->ie_list.ds_param = (uint8_t *)ie; 951 chan_idx = 952 ((struct ds_ie *)ie)->cur_chan; 953 *chan_freq = wlan_reg_chan_band_to_freq(pdev, chan_idx, 954 band_mask); 955 /* Drop if invalid freq */ 956 if (scan_obj->drop_bcn_on_invalid_freq && 957 wlan_reg_is_disable_for_freq(pdev, *chan_freq)) { 958 scm_debug_rl("%pM: Drop as invalid channel %d freq %d in DS IE", 959 scan_params->bssid.bytes, 960 chan_idx, *chan_freq); 961 return QDF_STATUS_E_INVAL; 962 } 963 break; 964 case WLAN_ELEMID_TIM: 965 if (ie->ie_len < WLAN_TIM_IE_MIN_LENGTH) 966 goto err; 967 scan_params->ie_list.tim = (uint8_t *)ie; 968 scan_params->dtim_period = 969 ((struct wlan_tim_ie *)ie)->tim_period; 970 break; 971 case WLAN_ELEMID_COUNTRY: 972 if (ie->ie_len < WLAN_COUNTRY_IE_MIN_LEN) 973 goto err; 974 scan_params->ie_list.country = (uint8_t *)ie; 975 break; 976 case WLAN_ELEMID_QBSS_LOAD: 977 if (ie->ie_len != sizeof(struct qbss_load_ie) - 978 sizeof(struct ie_header)) { 979 /* 980 * Expected QBSS IE length is 5Bytes; For some 981 * old cisco AP, QBSS IE length is 4Bytes, which 982 * doesn't match with latest spec, So ignore 983 * QBSS IE in such case. 984 */ 985 break; 986 } 987 scan_params->ie_list.qbssload = (uint8_t *)ie; 988 break; 989 case WLAN_ELEMID_CHANSWITCHANN: 990 if (ie->ie_len != WLAN_CSA_IE_MAX_LEN) 991 goto err; 992 scan_params->ie_list.csa = (uint8_t *)ie; 993 break; 994 case WLAN_ELEMID_IBSSDFS: 995 if (ie->ie_len < WLAN_IBSSDFS_IE_MIN_LEN) 996 goto err; 997 scan_params->ie_list.ibssdfs = (uint8_t *)ie; 998 break; 999 case WLAN_ELEMID_QUIET: 1000 if (ie->ie_len != WLAN_QUIET_IE_MAX_LEN) 1001 goto err; 1002 scan_params->ie_list.quiet = (uint8_t *)ie; 1003 break; 1004 case WLAN_ELEMID_ERP: 1005 if (ie->ie_len != (sizeof(struct erp_ie) - 1006 sizeof(struct ie_header))) 1007 goto err; 1008 scan_params->erp = ((struct erp_ie *)ie)->value; 1009 break; 1010 case WLAN_ELEMID_HTCAP_ANA: 1011 if (ie->ie_len != sizeof(struct htcap_cmn_ie)) 1012 goto err; 1013 scan_params->ie_list.htcap = 1014 (uint8_t *)&(((struct htcap_ie *)ie)->ie); 1015 break; 1016 case WLAN_ELEMID_RSN: 1017 if (ie->ie_len < WLAN_RSN_IE_MIN_LEN) 1018 goto err; 1019 scan_params->ie_list.rsn = (uint8_t *)ie; 1020 break; 1021 case WLAN_ELEMID_XRATES: 1022 scan_params->ie_list.xrates = (uint8_t *)ie; 1023 break; 1024 case WLAN_ELEMID_EXTCHANSWITCHANN: 1025 if (ie->ie_len != WLAN_XCSA_IE_MAX_LEN) 1026 goto err; 1027 scan_params->ie_list.xcsa = (uint8_t *)ie; 1028 break; 1029 case WLAN_ELEMID_SECCHANOFFSET: 1030 if (ie->ie_len != WLAN_SECCHANOFF_IE_MAX_LEN) 1031 goto err; 1032 scan_params->ie_list.secchanoff = (uint8_t *)ie; 1033 break; 1034 case WLAN_ELEMID_HTINFO_ANA: 1035 if (ie->ie_len != sizeof(struct wlan_ie_htinfo_cmn)) 1036 goto err; 1037 scan_params->ie_list.htinfo = 1038 (uint8_t *)&(((struct wlan_ie_htinfo *) ie)->hi_ie); 1039 chan_idx = ((struct wlan_ie_htinfo_cmn *) 1040 (scan_params->ie_list.htinfo))->hi_ctrlchannel; 1041 *chan_freq = wlan_reg_chan_band_to_freq(pdev, chan_idx, 1042 band_mask); 1043 /* Drop if invalid freq */ 1044 if (scan_obj->drop_bcn_on_invalid_freq && 1045 wlan_reg_is_disable_for_freq(pdev, *chan_freq)) { 1046 scm_debug_rl("%pM: Drop as invalid channel %d freq %d in HT_INFO IE", 1047 scan_params->bssid.bytes, 1048 chan_idx, *chan_freq); 1049 return QDF_STATUS_E_INVAL; 1050 } 1051 break; 1052 case WLAN_ELEMID_WAPI: 1053 if (ie->ie_len < WLAN_WAPI_IE_MIN_LEN) 1054 goto err; 1055 scan_params->ie_list.wapi = (uint8_t *)ie; 1056 break; 1057 case WLAN_ELEMID_XCAPS: 1058 if (ie->ie_len > WLAN_EXTCAP_IE_MAX_LEN) 1059 goto err; 1060 scan_params->ie_list.extcaps = (uint8_t *)ie; 1061 break; 1062 case WLAN_ELEMID_VHTCAP: 1063 if (ie->ie_len != (sizeof(struct wlan_ie_vhtcaps) - 1064 sizeof(struct ie_header))) 1065 goto err; 1066 scan_params->ie_list.vhtcap = (uint8_t *)ie; 1067 break; 1068 case WLAN_ELEMID_VHTOP: 1069 if (ie->ie_len != (sizeof(struct wlan_ie_vhtop) - 1070 sizeof(struct ie_header))) 1071 goto err; 1072 scan_params->ie_list.vhtop = (uint8_t *)ie; 1073 break; 1074 case WLAN_ELEMID_OP_MODE_NOTIFY: 1075 if (ie->ie_len != WLAN_OPMODE_IE_MAX_LEN) 1076 goto err; 1077 scan_params->ie_list.opmode = (uint8_t *)ie; 1078 break; 1079 case WLAN_ELEMID_MOBILITY_DOMAIN: 1080 if (ie->ie_len != WLAN_MOBILITY_DOMAIN_IE_MAX_LEN) 1081 goto err; 1082 scan_params->ie_list.mdie = (uint8_t *)ie; 1083 break; 1084 case WLAN_ELEMID_VENDOR: 1085 status = util_scan_parse_vendor_ie(scan_params, 1086 ie); 1087 if (QDF_IS_STATUS_ERROR(status)) 1088 goto err_status; 1089 break; 1090 case WLAN_ELEMID_CHAN_SWITCH_WRAP: 1091 scan_params->ie_list.cswrp = (uint8_t *)ie; 1092 /* Go to next sub IE */ 1093 sub_ie = (struct ie_header *) 1094 (((uint8_t *)ie) + sizeof(struct ie_header)); 1095 sub_ie_len = ie->ie_len; 1096 status = 1097 util_scan_parse_chan_switch_wrapper_ie( 1098 scan_params, sub_ie, sub_ie_len); 1099 if (QDF_IS_STATUS_ERROR(status)) { 1100 goto err_status; 1101 } 1102 break; 1103 case WLAN_ELEMID_FILS_INDICATION: 1104 if (ie->ie_len < WLAN_FILS_INDICATION_IE_MIN_LEN) 1105 goto err; 1106 scan_params->ie_list.fils_indication = (uint8_t *)ie; 1107 break; 1108 case WLAN_ELEMID_EXTN_ELEM: 1109 status = util_scan_parse_extn_ie(scan_params, ie); 1110 if (QDF_IS_STATUS_ERROR(status)) 1111 goto err_status; 1112 break; 1113 case WLAN_ELEMID_REDUCED_NEIGHBOR_REPORT: 1114 if (ie->ie_len < WLAN_RNR_IE_MIN_LEN) 1115 goto err; 1116 scan_params->ie_list.rnrie = (uint8_t *)ie; 1117 status = util_scan_parse_rnr_ie(scan_params, ie); 1118 if (QDF_IS_STATUS_ERROR(status)) 1119 goto err_status; 1120 break; 1121 default: 1122 break; 1123 } 1124 1125 /* Consume info element */ 1126 ie_len -= ie->ie_len; 1127 /* Go to next IE */ 1128 ie = (struct ie_header *) 1129 (((uint8_t *) ie) + 1130 sizeof(struct ie_header) + 1131 ie->ie_len); 1132 } 1133 1134 return QDF_STATUS_SUCCESS; 1135 1136 err: 1137 status = QDF_STATUS_E_INVAL; 1138 err_status: 1139 scm_debug("failed to parse IE - id: %d, len: %d", 1140 ie->ie_id, ie->ie_len); 1141 1142 return status; 1143 } 1144 1145 /** 1146 * util_scan_update_esp_data: update ESP params from beacon/probe response 1147 * @esp_information: pointer to wlan_esp_information 1148 * @scan_entry: new received entry 1149 * 1150 * The Estimated Service Parameters element is 1151 * used by a AP to provide information to another STA which 1152 * can then use the information as input to an algorithm to 1153 * generate an estimate of throughput between the two STAs. 1154 * The ESP Information List field contains from 1 to 4 ESP 1155 * Information fields(each field 24 bits), each corresponding 1156 * to an access category for which estimated service parameters 1157 * information is provided. 1158 * 1159 * Return: None 1160 */ 1161 static void util_scan_update_esp_data(struct wlan_esp_ie *esp_information, 1162 struct scan_cache_entry *scan_entry) 1163 { 1164 1165 uint8_t *data; 1166 int i = 0; 1167 uint64_t total_elements; 1168 struct wlan_esp_info *esp_info; 1169 struct wlan_esp_ie *esp_ie; 1170 1171 esp_ie = (struct wlan_esp_ie *) 1172 util_scan_entry_esp_info(scan_entry); 1173 1174 total_elements = esp_ie->esp_len; 1175 data = (uint8_t *)esp_ie + 3; 1176 do_div(total_elements, ESP_INFORMATION_LIST_LENGTH); 1177 1178 if (total_elements > MAX_ESP_INFORMATION_FIELD) { 1179 scm_err("No of Air time fractions are greater than supported"); 1180 return; 1181 } 1182 1183 for (i = 0; i < total_elements; i++) { 1184 esp_info = (struct wlan_esp_info *)data; 1185 if (esp_info->access_category == ESP_AC_BK) { 1186 qdf_mem_copy(&esp_information->esp_info_AC_BK, 1187 data, 3); 1188 data = data + ESP_INFORMATION_LIST_LENGTH; 1189 continue; 1190 } 1191 if (esp_info->access_category == ESP_AC_BE) { 1192 qdf_mem_copy(&esp_information->esp_info_AC_BE, 1193 data, 3); 1194 data = data + ESP_INFORMATION_LIST_LENGTH; 1195 continue; 1196 } 1197 if (esp_info->access_category == ESP_AC_VI) { 1198 qdf_mem_copy(&esp_information->esp_info_AC_VI, 1199 data, 3); 1200 data = data + ESP_INFORMATION_LIST_LENGTH; 1201 continue; 1202 } 1203 if (esp_info->access_category == ESP_AC_VO) { 1204 qdf_mem_copy(&esp_information->esp_info_AC_VO, 1205 data, 3); 1206 data = data + ESP_INFORMATION_LIST_LENGTH; 1207 break; 1208 } 1209 } 1210 } 1211 1212 /** 1213 * util_scan_scm_update_bss_with_esp_dataa: calculate estimated air time 1214 * fraction 1215 * @scan_entry: new received entry 1216 * 1217 * This function process all Access category ESP params and provide 1218 * best effort air time fraction. 1219 * If best effort is not available, it will choose VI, VO and BK in sequence 1220 * 1221 */ 1222 static void util_scan_scm_update_bss_with_esp_data( 1223 struct scan_cache_entry *scan_entry) 1224 { 1225 uint8_t air_time_fraction = 0; 1226 struct wlan_esp_ie esp_information; 1227 1228 if (!scan_entry->ie_list.esp) 1229 return; 1230 1231 util_scan_update_esp_data(&esp_information, scan_entry); 1232 1233 /* 1234 * If the ESP metric is transmitting multiple airtime fractions, then 1235 * follow the sequence AC_BE, AC_VI, AC_VO, AC_BK and pick whichever is 1236 * the first one available 1237 */ 1238 if (esp_information.esp_info_AC_BE.access_category 1239 == ESP_AC_BE) 1240 air_time_fraction = 1241 esp_information.esp_info_AC_BE. 1242 estimated_air_fraction; 1243 else if (esp_information.esp_info_AC_VI.access_category 1244 == ESP_AC_VI) 1245 air_time_fraction = 1246 esp_information.esp_info_AC_VI. 1247 estimated_air_fraction; 1248 else if (esp_information.esp_info_AC_VO.access_category 1249 == ESP_AC_VO) 1250 air_time_fraction = 1251 esp_information.esp_info_AC_VO. 1252 estimated_air_fraction; 1253 else if (esp_information.esp_info_AC_BK.access_category 1254 == ESP_AC_BK) 1255 air_time_fraction = 1256 esp_information.esp_info_AC_BK. 1257 estimated_air_fraction; 1258 scan_entry->air_time_fraction = air_time_fraction; 1259 } 1260 1261 /** 1262 * util_scan_scm_calc_nss_supported_by_ap() - finds out nss from AP 1263 * @scan_entry: new received entry 1264 * 1265 * Return: number of nss advertised by AP 1266 */ 1267 static int util_scan_scm_calc_nss_supported_by_ap( 1268 struct scan_cache_entry *scan_params) 1269 { 1270 struct htcap_cmn_ie *htcap; 1271 struct wlan_ie_vhtcaps *vhtcaps; 1272 struct wlan_ie_hecaps *hecaps; 1273 uint16_t rx_mcs_map = 0; 1274 1275 htcap = (struct htcap_cmn_ie *) 1276 util_scan_entry_htcap(scan_params); 1277 vhtcaps = (struct wlan_ie_vhtcaps *) 1278 util_scan_entry_vhtcap(scan_params); 1279 hecaps = (struct wlan_ie_hecaps *) 1280 util_scan_entry_hecap(scan_params); 1281 1282 if (hecaps) { 1283 /* Using rx mcs map related to 80MHz or lower as in some 1284 * cases higher mcs may suuport lesser NSS than that 1285 * of lowe mcs. Thus giving max NSS capability. 1286 */ 1287 rx_mcs_map = 1288 qdf_cpu_to_le16(hecaps->mcs_bw_map[0].rx_mcs_map); 1289 } else if (vhtcaps) { 1290 rx_mcs_map = vhtcaps->rx_mcs_map; 1291 } 1292 1293 if (hecaps || vhtcaps) { 1294 if ((rx_mcs_map & 0xC000) != 0xC000) 1295 return 8; 1296 1297 if ((rx_mcs_map & 0x3000) != 0x3000) 1298 return 7; 1299 1300 if ((rx_mcs_map & 0x0C00) != 0x0C00) 1301 return 6; 1302 1303 if ((rx_mcs_map & 0x0300) != 0x0300) 1304 return 5; 1305 1306 if ((rx_mcs_map & 0x00C0) != 0x00C0) 1307 return 4; 1308 1309 if ((rx_mcs_map & 0x0030) != 0x0030) 1310 return 3; 1311 1312 if ((rx_mcs_map & 0x000C) != 0x000C) 1313 return 2; 1314 } else if (htcap) { 1315 if (htcap->mcsset[3]) 1316 return 4; 1317 1318 if (htcap->mcsset[2]) 1319 return 3; 1320 1321 if (htcap->mcsset[1]) 1322 return 2; 1323 1324 } 1325 return 1; 1326 } 1327 1328 #ifdef WLAN_DFS_CHAN_HIDDEN_SSID 1329 QDF_STATUS 1330 util_scan_add_hidden_ssid(struct wlan_objmgr_pdev *pdev, qdf_nbuf_t bcnbuf) 1331 { 1332 struct wlan_frame_hdr *hdr; 1333 struct wlan_bcn_frame *bcn; 1334 struct wlan_scan_obj *scan_obj; 1335 struct wlan_ssid *conf_ssid; 1336 struct ie_header *ie; 1337 uint32_t frame_len = qdf_nbuf_len(bcnbuf); 1338 uint16_t bcn_ie_offset, ssid_ie_start_offset, ssid_ie_end_offset; 1339 uint16_t tmplen, ie_length; 1340 uint8_t *pbeacon, *tmp; 1341 bool set_ssid_flag = false; 1342 struct ie_ssid *ssid; 1343 uint8_t pdev_id; 1344 1345 if (!pdev) { 1346 scm_warn("pdev: 0x%pK is NULL", pdev); 1347 return QDF_STATUS_E_NULL_VALUE; 1348 } 1349 pdev_id = wlan_objmgr_pdev_get_pdev_id(pdev); 1350 scan_obj = wlan_pdev_get_scan_obj(pdev); 1351 if (!scan_obj) { 1352 scm_warn("null scan_obj"); 1353 return QDF_STATUS_E_NULL_VALUE; 1354 } 1355 1356 conf_ssid = &scan_obj->pdev_info[pdev_id].conf_ssid; 1357 1358 hdr = (struct wlan_frame_hdr *)qdf_nbuf_data(bcnbuf); 1359 1360 /* received bssid does not match configured bssid */ 1361 if (qdf_mem_cmp(hdr->i_addr3, scan_obj->pdev_info[pdev_id].conf_bssid, 1362 QDF_MAC_ADDR_SIZE) || 1363 conf_ssid->length == 0) { 1364 return QDF_STATUS_SUCCESS; 1365 } 1366 1367 bcn = (struct wlan_bcn_frame *)(qdf_nbuf_data(bcnbuf) + sizeof(*hdr)); 1368 pbeacon = (uint8_t *)bcn; 1369 1370 ie = (struct ie_header *)(pbeacon + 1371 offsetof(struct wlan_bcn_frame, ie)); 1372 1373 bcn_ie_offset = offsetof(struct wlan_bcn_frame, ie); 1374 ie_length = (uint16_t)(frame_len - sizeof(*hdr) - 1375 bcn_ie_offset); 1376 1377 while (ie_length >= sizeof(struct ie_header)) { 1378 ie_length -= sizeof(struct ie_header); 1379 1380 bcn_ie_offset += sizeof(struct ie_header); 1381 1382 if (ie_length < ie->ie_len) { 1383 scm_debug("Incomplete corrupted IE:%x", ie->ie_id); 1384 return QDF_STATUS_E_INVAL; 1385 } 1386 if (ie->ie_id == WLAN_ELEMID_SSID) { 1387 if (ie->ie_len > (sizeof(struct ie_ssid) - 1388 sizeof(struct ie_header))) { 1389 return QDF_STATUS_E_INVAL; 1390 } 1391 ssid = (struct ie_ssid *)ie; 1392 if (util_scan_is_hidden_ssid(ssid)) { 1393 set_ssid_flag = true; 1394 ssid_ie_start_offset = bcn_ie_offset - 1395 sizeof(struct ie_header); 1396 ssid_ie_end_offset = bcn_ie_offset + 1397 ie->ie_len; 1398 } 1399 } 1400 if (ie->ie_len == 0) { 1401 ie += 1; /* next IE */ 1402 continue; 1403 } 1404 if (ie->ie_id == WLAN_ELEMID_VENDOR && 1405 is_wps_oui((uint8_t *)ie)) { 1406 set_ssid_flag = false; 1407 break; 1408 } 1409 /* Consume info element */ 1410 ie_length -= ie->ie_len; 1411 /* Go to next IE */ 1412 ie = (struct ie_header *)(((uint8_t *)ie) + 1413 sizeof(struct ie_header) + 1414 ie->ie_len); 1415 } 1416 1417 if (set_ssid_flag) { 1418 /* Hidden SSID if the Length is 0 */ 1419 if (!ssid->ssid_len) { 1420 /* increase the taillength by length of ssid */ 1421 if (qdf_nbuf_put_tail(bcnbuf, 1422 conf_ssid->length) == NULL) { 1423 scm_debug("No enough tailroom"); 1424 return QDF_STATUS_E_NOMEM; 1425 } 1426 /* length of the buffer to be copied */ 1427 tmplen = frame_len - 1428 sizeof(*hdr) - ssid_ie_end_offset; 1429 /* 1430 * tmp memory to copy the beacon info 1431 * after ssid ie. 1432 */ 1433 tmp = qdf_mem_malloc(tmplen * sizeof(u_int8_t)); 1434 if (!tmp) 1435 return QDF_STATUS_E_NOMEM; 1436 1437 /* Copy beacon data after ssid ie to tmp */ 1438 qdf_nbuf_copy_bits(bcnbuf, (sizeof(*hdr) + 1439 ssid_ie_end_offset), tmplen, tmp); 1440 /* Add ssid length */ 1441 *(pbeacon + (ssid_ie_start_offset + 1)) 1442 = conf_ssid->length; 1443 /* Insert the SSID string */ 1444 qdf_mem_copy((pbeacon + ssid_ie_end_offset), 1445 conf_ssid->ssid, conf_ssid->length); 1446 /* Copy rest of the beacon data */ 1447 qdf_mem_copy((pbeacon + ssid_ie_end_offset + 1448 conf_ssid->length), tmp, tmplen); 1449 qdf_mem_free(tmp); 1450 1451 /* Hidden ssid with all 0's */ 1452 } else if (ssid->ssid_len == conf_ssid->length) { 1453 /* Insert the SSID string */ 1454 qdf_mem_copy((pbeacon + ssid_ie_start_offset + 1455 sizeof(struct ie_header)), 1456 conf_ssid->ssid, conf_ssid->length); 1457 } else { 1458 scm_debug("mismatch in hidden ssid length"); 1459 return QDF_STATUS_E_INVAL; 1460 } 1461 } 1462 return QDF_STATUS_SUCCESS; 1463 } 1464 #endif /* WLAN_DFS_CHAN_HIDDEN_SSID */ 1465 1466 #ifdef WLAN_ADAPTIVE_11R 1467 /** 1468 * scm_fill_adaptive_11r_cap() - Check if the AP supports adaptive 11r 1469 * @scan_entry: Pointer to the scan entry 1470 * 1471 * Return: true if adaptive 11r is advertised else false 1472 */ 1473 static void scm_fill_adaptive_11r_cap(struct scan_cache_entry *scan_entry) 1474 { 1475 uint8_t *ie; 1476 uint8_t data; 1477 bool adaptive_11r; 1478 1479 ie = util_scan_entry_adaptive_11r(scan_entry); 1480 if (!ie) 1481 return; 1482 1483 data = *(ie + OUI_LENGTH); 1484 adaptive_11r = (data & 0x1) ? true : false; 1485 1486 scan_entry->adaptive_11r_ap = adaptive_11r; 1487 } 1488 #else 1489 static void scm_fill_adaptive_11r_cap(struct scan_cache_entry *scan_entry) 1490 { 1491 scan_entry->adaptive_11r_ap = false; 1492 } 1493 #endif 1494 1495 static void util_scan_set_security(struct scan_cache_entry *scan_params) 1496 { 1497 if (util_scan_entry_wpa(scan_params)) 1498 scan_params->security_type |= SCAN_SECURITY_TYPE_WPA; 1499 1500 if (util_scan_entry_rsn(scan_params)) 1501 scan_params->security_type |= SCAN_SECURITY_TYPE_RSN; 1502 if (util_scan_entry_wapi(scan_params)) 1503 scan_params->security_type |= SCAN_SECURITY_TYPE_WAPI; 1504 1505 if (!scan_params->security_type && 1506 scan_params->cap_info.wlan_caps.privacy) 1507 scan_params->security_type |= SCAN_SECURITY_TYPE_WEP; 1508 } 1509 1510 static QDF_STATUS 1511 util_scan_gen_scan_entry(struct wlan_objmgr_pdev *pdev, 1512 uint8_t *frame, qdf_size_t frame_len, 1513 uint32_t frm_subtype, 1514 struct mgmt_rx_event_params *rx_param, 1515 struct scan_mbssid_info *mbssid_info, 1516 qdf_list_t *scan_list) 1517 { 1518 struct wlan_frame_hdr *hdr; 1519 struct wlan_bcn_frame *bcn; 1520 QDF_STATUS status = QDF_STATUS_SUCCESS; 1521 struct ie_ssid *ssid; 1522 struct scan_cache_entry *scan_entry; 1523 struct qbss_load_ie *qbss_load; 1524 struct scan_cache_node *scan_node; 1525 uint8_t i; 1526 qdf_freq_t chan_freq = 0; 1527 bool he_6g_dup_bcon = false; 1528 uint8_t band_mask; 1529 1530 scan_entry = qdf_mem_malloc_atomic(sizeof(*scan_entry)); 1531 if (!scan_entry) { 1532 scm_err("failed to allocate memory for scan_entry"); 1533 return QDF_STATUS_E_NOMEM; 1534 } 1535 scan_entry->raw_frame.ptr = 1536 qdf_mem_malloc_atomic(frame_len); 1537 if (!scan_entry->raw_frame.ptr) { 1538 scm_err("failed to allocate memory for frame"); 1539 qdf_mem_free(scan_entry); 1540 return QDF_STATUS_E_NOMEM; 1541 } 1542 1543 bcn = (struct wlan_bcn_frame *) 1544 (frame + sizeof(*hdr)); 1545 hdr = (struct wlan_frame_hdr *)frame; 1546 1547 /* update timestamp in nanoseconds needed by kernel layers */ 1548 scan_entry->boottime_ns = qdf_get_bootbased_boottime_ns(); 1549 1550 scan_entry->frm_subtype = frm_subtype; 1551 qdf_mem_copy(scan_entry->bssid.bytes, 1552 hdr->i_addr3, QDF_MAC_ADDR_SIZE); 1553 /* Scr addr */ 1554 qdf_mem_copy(scan_entry->mac_addr.bytes, 1555 hdr->i_addr2, QDF_MAC_ADDR_SIZE); 1556 scan_entry->seq_num = 1557 (le16toh(*(uint16_t *)hdr->i_seq) >> WLAN_SEQ_SEQ_SHIFT); 1558 1559 scan_entry->snr = rx_param->snr; 1560 scan_entry->avg_snr = WLAN_SNR_IN(scan_entry->snr); 1561 scan_entry->rssi_raw = rx_param->rssi; 1562 scan_entry->avg_rssi = WLAN_RSSI_IN(scan_entry->rssi_raw); 1563 scan_entry->tsf_delta = rx_param->tsf_delta; 1564 scan_entry->pdev_id = wlan_objmgr_pdev_get_pdev_id(pdev); 1565 1566 /* Copy per chain rssi to scan entry */ 1567 qdf_mem_copy(scan_entry->per_chain_rssi, rx_param->rssi_ctl, 1568 WLAN_MGMT_TXRX_HOST_MAX_ANTENNA); 1569 band_mask = BIT(wlan_reg_freq_to_band(rx_param->chan_freq)); 1570 1571 if (!wlan_psoc_nif_fw_ext_cap_get(wlan_pdev_get_psoc(pdev), 1572 WLAN_SOC_CEXT_HW_DB2DBM)) { 1573 for (i = 0; i < WLAN_MGMT_TXRX_HOST_MAX_ANTENNA; i++) { 1574 if (scan_entry->per_chain_rssi[i] != 1575 WLAN_INVALID_PER_CHAIN_SNR) 1576 scan_entry->per_chain_rssi[i] += 1577 WLAN_NOISE_FLOOR_DBM_DEFAULT; 1578 else 1579 scan_entry->per_chain_rssi[i] = 1580 WLAN_INVALID_PER_CHAIN_RSSI; 1581 } 1582 } 1583 1584 /* store jiffies */ 1585 scan_entry->rrm_parent_tsf = (uint32_t)qdf_system_ticks(); 1586 1587 scan_entry->bcn_int = le16toh(bcn->beacon_interval); 1588 1589 /* 1590 * In case if the beacon dosnt have 1591 * valid beacon interval falback to def 1592 */ 1593 if (!scan_entry->bcn_int) 1594 scan_entry->bcn_int = 100; 1595 scan_entry->cap_info.value = le16toh(bcn->capability.value); 1596 qdf_mem_copy(scan_entry->tsf_info.data, 1597 bcn->timestamp, 8); 1598 scan_entry->erp = ERP_NON_ERP_PRESENT; 1599 1600 scan_entry->scan_entry_time = 1601 qdf_mc_timer_get_system_time(); 1602 1603 scan_entry->raw_frame.len = frame_len; 1604 qdf_mem_copy(scan_entry->raw_frame.ptr, 1605 frame, frame_len); 1606 status = util_scan_populate_bcn_ie_list(pdev, scan_entry, &chan_freq, 1607 band_mask); 1608 if (QDF_IS_STATUS_ERROR(status)) { 1609 scm_debug("%pM: failed to parse beacon IE", 1610 scan_entry->bssid.bytes); 1611 qdf_mem_free(scan_entry->raw_frame.ptr); 1612 qdf_mem_free(scan_entry); 1613 return QDF_STATUS_E_FAILURE; 1614 } 1615 1616 ssid = (struct ie_ssid *) 1617 scan_entry->ie_list.ssid; 1618 1619 if (ssid && (ssid->ssid_len > WLAN_SSID_MAX_LEN)) { 1620 qdf_mem_free(scan_entry->raw_frame.ptr); 1621 qdf_mem_free(scan_entry); 1622 return QDF_STATUS_E_FAILURE; 1623 } 1624 1625 if (scan_entry->ie_list.p2p) 1626 scan_entry->is_p2p = true; 1627 1628 if (!chan_freq && util_scan_entry_hecap(scan_entry)) { 1629 status = util_scan_get_chan_from_he_6g_params(pdev, scan_entry, 1630 &chan_freq, 1631 &he_6g_dup_bcon, 1632 band_mask); 1633 if (QDF_IS_STATUS_ERROR(status)) { 1634 qdf_mem_free(scan_entry->raw_frame.ptr); 1635 qdf_mem_free(scan_entry); 1636 return QDF_STATUS_E_FAILURE; 1637 } 1638 } 1639 1640 if (chan_freq) 1641 scan_entry->channel.chan_freq = chan_freq; 1642 1643 /* If no channel info is present in beacon use meta channel */ 1644 if (!scan_entry->channel.chan_freq) { 1645 scan_entry->channel.chan_freq = rx_param->chan_freq; 1646 } else if (rx_param->chan_freq != 1647 scan_entry->channel.chan_freq) { 1648 if (!wlan_reg_is_49ghz_freq(scan_entry->channel.chan_freq) && 1649 !he_6g_dup_bcon) 1650 scan_entry->channel_mismatch = true; 1651 } 1652 1653 if (util_scan_is_hidden_ssid(ssid)) { 1654 scan_entry->ie_list.ssid = NULL; 1655 scan_entry->is_hidden_ssid = true; 1656 } else { 1657 qdf_mem_copy(scan_entry->ssid.ssid, 1658 ssid->ssid, ssid->ssid_len); 1659 scan_entry->ssid.length = ssid->ssid_len; 1660 scan_entry->hidden_ssid_timestamp = 1661 scan_entry->scan_entry_time; 1662 } 1663 qdf_mem_copy(&scan_entry->mbssid_info, mbssid_info, 1664 sizeof(scan_entry->mbssid_info)); 1665 1666 scan_entry->phy_mode = util_scan_get_phymode(pdev, scan_entry); 1667 1668 scan_entry->nss = util_scan_scm_calc_nss_supported_by_ap(scan_entry); 1669 scm_fill_adaptive_11r_cap(scan_entry); 1670 util_scan_set_security(scan_entry); 1671 1672 util_scan_scm_update_bss_with_esp_data(scan_entry); 1673 qbss_load = (struct qbss_load_ie *) 1674 util_scan_entry_qbssload(scan_entry); 1675 if (qbss_load) 1676 scan_entry->qbss_chan_load = qbss_load->qbss_chan_load; 1677 1678 scan_node = qdf_mem_malloc_atomic(sizeof(*scan_node)); 1679 if (!scan_node) { 1680 qdf_mem_free(scan_entry->raw_frame.ptr); 1681 qdf_mem_free(scan_entry); 1682 return QDF_STATUS_E_FAILURE; 1683 } 1684 1685 scan_node->entry = scan_entry; 1686 qdf_list_insert_front(scan_list, &scan_node->node); 1687 1688 return status; 1689 } 1690 1691 /** 1692 * util_scan_find_ie() - find information element 1693 * @eid: element id 1694 * @ies: pointer consisting of IEs 1695 * @len: IE length 1696 * 1697 * Return: NULL if the element ID is not found or if IE pointer is NULL else 1698 * pointer to the first byte of the requested element 1699 */ 1700 static uint8_t *util_scan_find_ie(uint8_t eid, uint8_t *ies, 1701 int32_t len) 1702 { 1703 if (!ies) 1704 return NULL; 1705 1706 while (len >= 2 && len >= ies[1] + 2) { 1707 if (ies[0] == eid) 1708 return ies; 1709 len -= ies[1] + 2; 1710 ies += ies[1] + 2; 1711 } 1712 1713 return NULL; 1714 } 1715 1716 #ifdef WLAN_FEATURE_MBSSID 1717 static void util_gen_new_bssid(uint8_t *bssid, uint8_t max_bssid, 1718 uint8_t mbssid_index, 1719 uint8_t *new_bssid_addr) 1720 { 1721 uint8_t lsb_n; 1722 int i; 1723 1724 for (i = 0; i < QDF_MAC_ADDR_SIZE; i++) 1725 new_bssid_addr[i] = bssid[i]; 1726 1727 lsb_n = new_bssid_addr[5] & ((1 << max_bssid) - 1); 1728 1729 new_bssid_addr[5] &= ~((1 << max_bssid) - 1); 1730 new_bssid_addr[5] |= (lsb_n + mbssid_index) % (1 << max_bssid); 1731 } 1732 1733 static uint32_t util_gen_new_ie(uint8_t *ie, uint32_t ielen, 1734 uint8_t *subelement, 1735 size_t subie_len, uint8_t *new_ie) 1736 { 1737 uint8_t *pos, *tmp; 1738 const uint8_t *tmp_old, *tmp_new; 1739 uint8_t *sub_copy; 1740 1741 /* copy subelement as we need to change its content to 1742 * mark an ie after it is processed. 1743 */ 1744 sub_copy = qdf_mem_malloc(subie_len); 1745 if (!sub_copy) 1746 return 0; 1747 qdf_mem_copy(sub_copy, subelement, subie_len); 1748 1749 pos = &new_ie[0]; 1750 1751 /* new ssid */ 1752 tmp_new = util_scan_find_ie(WLAN_ELEMID_SSID, sub_copy, subie_len); 1753 if (tmp_new) { 1754 qdf_mem_copy(pos, tmp_new, tmp_new[1] + 2); 1755 pos += (tmp_new[1] + 2); 1756 } 1757 1758 /* go through IEs in ie (skip SSID) and subelement, 1759 * merge them into new_ie 1760 */ 1761 tmp_old = util_scan_find_ie(WLAN_ELEMID_SSID, ie, ielen); 1762 tmp_old = (tmp_old) ? tmp_old + tmp_old[1] + 2 : ie; 1763 1764 while (tmp_old + tmp_old[1] + 2 - ie <= ielen) { 1765 if (tmp_old[0] == 0) { 1766 tmp_old++; 1767 continue; 1768 } 1769 1770 tmp = (uint8_t *)util_scan_find_ie(tmp_old[0], sub_copy, 1771 subie_len); 1772 if (!tmp) { 1773 /* ie in old ie but not in subelement */ 1774 if (tmp_old[0] != WLAN_ELEMID_MULTIPLE_BSSID) { 1775 qdf_mem_copy(pos, tmp_old, tmp_old[1] + 2); 1776 pos += tmp_old[1] + 2; 1777 } 1778 } else { 1779 /* ie in transmitting ie also in subelement, 1780 * copy from subelement and flag the ie in subelement 1781 * as copied (by setting eid field to 0xff). For 1782 * vendor ie, compare OUI + type + subType to 1783 * determine if they are the same ie. 1784 */ 1785 if (tmp_old[0] == WLAN_ELEMID_VENDOR) { 1786 if (!qdf_mem_cmp(tmp_old + 2, tmp + 2, 5)) { 1787 /* same vendor ie, copy from 1788 * subelement 1789 */ 1790 qdf_mem_copy(pos, tmp, tmp[1] + 2); 1791 pos += tmp[1] + 2; 1792 tmp[0] = 0xff; 1793 } else { 1794 qdf_mem_copy(pos, tmp_old, 1795 tmp_old[1] + 2); 1796 pos += tmp_old[1] + 2; 1797 } 1798 } else { 1799 /* copy ie from subelement into new ie */ 1800 qdf_mem_copy(pos, tmp, tmp[1] + 2); 1801 pos += tmp[1] + 2; 1802 tmp[0] = 0xff; 1803 } 1804 } 1805 1806 if (tmp_old + tmp_old[1] + 2 - ie == ielen) 1807 break; 1808 1809 tmp_old += tmp_old[1] + 2; 1810 } 1811 1812 /* go through subelement again to check if there is any ie not 1813 * copied to new ie, skip ssid, capability, bssid-index ie 1814 */ 1815 tmp_new = sub_copy; 1816 while (tmp_new + tmp_new[1] + 2 - sub_copy <= subie_len) { 1817 if (!(tmp_new[0] == WLAN_ELEMID_NONTX_BSSID_CAP || 1818 tmp_new[0] == WLAN_ELEMID_SSID || 1819 tmp_new[0] == WLAN_ELEMID_MULTI_BSSID_IDX || 1820 tmp_new[0] == 0xff)) { 1821 qdf_mem_copy(pos, tmp_new, tmp_new[1] + 2); 1822 pos += tmp_new[1] + 2; 1823 } 1824 if (tmp_new + tmp_new[1] + 2 - sub_copy == subie_len) 1825 break; 1826 tmp_new += tmp_new[1] + 2; 1827 } 1828 1829 qdf_mem_free(sub_copy); 1830 return pos - new_ie; 1831 } 1832 1833 static QDF_STATUS util_scan_parse_mbssid(struct wlan_objmgr_pdev *pdev, 1834 uint8_t *frame, qdf_size_t frame_len, 1835 uint32_t frm_subtype, 1836 struct mgmt_rx_event_params *rx_param, 1837 qdf_list_t *scan_list) 1838 { 1839 struct wlan_bcn_frame *bcn; 1840 struct wlan_frame_hdr *hdr; 1841 struct scan_mbssid_info mbssid_info; 1842 QDF_STATUS status; 1843 uint8_t *pos, *subelement, *mbssid_end_pos; 1844 uint8_t *tmp, *mbssid_index_ie; 1845 uint32_t subie_len, new_ie_len; 1846 uint8_t new_bssid[QDF_MAC_ADDR_SIZE], bssid[QDF_MAC_ADDR_SIZE]; 1847 uint8_t *new_ie; 1848 uint8_t *ie, *new_frame = NULL; 1849 uint64_t ielen, new_frame_len; 1850 1851 hdr = (struct wlan_frame_hdr *)frame; 1852 bcn = (struct wlan_bcn_frame *)(frame + sizeof(struct wlan_frame_hdr)); 1853 ie = (uint8_t *)&bcn->ie; 1854 ielen = (uint16_t)(frame_len - 1855 sizeof(struct wlan_frame_hdr) - 1856 offsetof(struct wlan_bcn_frame, ie)); 1857 qdf_mem_copy(bssid, hdr->i_addr3, QDF_MAC_ADDR_SIZE); 1858 1859 if (!util_scan_find_ie(WLAN_ELEMID_MULTIPLE_BSSID, ie, ielen)) 1860 return QDF_STATUS_E_FAILURE; 1861 1862 pos = ie; 1863 1864 new_ie = qdf_mem_malloc(MAX_IE_LEN); 1865 if (!new_ie) 1866 return QDF_STATUS_E_NOMEM; 1867 1868 while (pos < ie + ielen + 2) { 1869 tmp = util_scan_find_ie(WLAN_ELEMID_MULTIPLE_BSSID, pos, 1870 ielen - (pos - ie)); 1871 if (!tmp) 1872 break; 1873 1874 mbssid_info.profile_count = 1 << tmp[2]; 1875 mbssid_end_pos = tmp + tmp[1] + 2; 1876 /* Skip Element ID, Len, MaxBSSID Indicator */ 1877 if (tmp[1] < 4) 1878 break; 1879 for (subelement = tmp + 3; subelement < mbssid_end_pos - 1; 1880 subelement += 2 + subelement[1]) { 1881 subie_len = subelement[1]; 1882 if (mbssid_end_pos - subelement < 2 + subie_len) 1883 break; 1884 if (subelement[0] != 0 || subelement[1] < 4) { 1885 /* not a valid BSS profile */ 1886 continue; 1887 } 1888 1889 if (subelement[2] != WLAN_ELEMID_NONTX_BSSID_CAP || 1890 subelement[3] != 2) { 1891 /* The first element within the Nontransmitted 1892 * BSSID Profile is not the Nontransmitted 1893 * BSSID Capability element. 1894 */ 1895 continue; 1896 } 1897 1898 /* found a Nontransmitted BSSID Profile */ 1899 mbssid_index_ie = 1900 util_scan_find_ie(WLAN_ELEMID_MULTI_BSSID_IDX, 1901 subelement + 2, subie_len); 1902 if (!mbssid_index_ie || mbssid_index_ie[1] < 1 || 1903 mbssid_index_ie[2] == 0) { 1904 /* No valid Multiple BSSID-Index element */ 1905 continue; 1906 } 1907 qdf_mem_copy(&mbssid_info.trans_bssid, bssid, 1908 QDF_MAC_ADDR_SIZE); 1909 mbssid_info.profile_num = mbssid_index_ie[2]; 1910 util_gen_new_bssid(bssid, tmp[2], mbssid_index_ie[2], 1911 new_bssid); 1912 new_ie_len = util_gen_new_ie(ie, ielen, subelement + 2, 1913 subie_len, new_ie); 1914 if (!new_ie_len) 1915 continue; 1916 1917 new_frame_len = frame_len - ielen + new_ie_len; 1918 new_frame = qdf_mem_malloc(new_frame_len); 1919 if (!new_frame) { 1920 qdf_mem_free(new_ie); 1921 return QDF_STATUS_E_NOMEM; 1922 } 1923 1924 /* 1925 * Copy the header(24byte), timestamp(8 byte), 1926 * beaconinterval(2byte) and capability(2byte) 1927 */ 1928 qdf_mem_copy(new_frame, frame, 36); 1929 /* Copy the new ie generated from MBSSID profile*/ 1930 hdr = (struct wlan_frame_hdr *)new_frame; 1931 qdf_mem_copy(hdr->i_addr2, new_bssid, 1932 QDF_MAC_ADDR_SIZE); 1933 qdf_mem_copy(hdr->i_addr3, new_bssid, 1934 QDF_MAC_ADDR_SIZE); 1935 /* Copy the new ie generated from MBSSID profile*/ 1936 qdf_mem_copy(new_frame + 1937 offsetof(struct wlan_bcn_frame, ie) + 1938 sizeof(struct wlan_frame_hdr), 1939 new_ie, new_ie_len); 1940 status = util_scan_gen_scan_entry(pdev, new_frame, 1941 new_frame_len, 1942 frm_subtype, 1943 rx_param, 1944 &mbssid_info, 1945 scan_list); 1946 if (QDF_IS_STATUS_ERROR(status)) { 1947 qdf_mem_free(new_frame); 1948 scm_err("failed to generate a scan entry"); 1949 break; 1950 } 1951 /* scan entry makes its own copy so free the frame*/ 1952 qdf_mem_free(new_frame); 1953 } 1954 1955 pos = mbssid_end_pos; 1956 } 1957 qdf_mem_free(new_ie); 1958 1959 return QDF_STATUS_SUCCESS; 1960 } 1961 #else 1962 static QDF_STATUS util_scan_parse_mbssid(struct wlan_objmgr_pdev *pdev, 1963 uint8_t *frame, qdf_size_t frame_len, 1964 uint32_t frm_subtype, 1965 struct mgmt_rx_event_params *rx_param, 1966 qdf_list_t *scan_list) 1967 { 1968 return QDF_STATUS_SUCCESS; 1969 } 1970 #endif 1971 1972 static QDF_STATUS 1973 util_scan_parse_beacon_frame(struct wlan_objmgr_pdev *pdev, 1974 uint8_t *frame, 1975 qdf_size_t frame_len, 1976 uint32_t frm_subtype, 1977 struct mgmt_rx_event_params *rx_param, 1978 qdf_list_t *scan_list) 1979 { 1980 struct wlan_bcn_frame *bcn; 1981 struct wlan_frame_hdr *hdr; 1982 uint8_t *mbssid_ie = NULL; 1983 uint32_t ie_len = 0; 1984 QDF_STATUS status; 1985 struct scan_mbssid_info mbssid_info = { 0 }; 1986 1987 hdr = (struct wlan_frame_hdr *)frame; 1988 bcn = (struct wlan_bcn_frame *) 1989 (frame + sizeof(struct wlan_frame_hdr)); 1990 ie_len = (uint16_t)(frame_len - 1991 sizeof(struct wlan_frame_hdr) - 1992 offsetof(struct wlan_bcn_frame, ie)); 1993 1994 mbssid_ie = util_scan_find_ie(WLAN_ELEMID_MULTIPLE_BSSID, 1995 (uint8_t *)&bcn->ie, ie_len); 1996 if (mbssid_ie) { 1997 qdf_mem_copy(&mbssid_info.trans_bssid, 1998 hdr->i_addr3, QDF_MAC_ADDR_SIZE); 1999 mbssid_info.profile_count = 1 << mbssid_ie[2]; 2000 } 2001 2002 status = util_scan_gen_scan_entry(pdev, frame, frame_len, 2003 frm_subtype, rx_param, 2004 &mbssid_info, 2005 scan_list); 2006 2007 /* 2008 * IF MBSSID IE is present in the beacon then 2009 * scan component will create a new entry for 2010 * each BSSID found in the MBSSID 2011 */ 2012 if (mbssid_ie) 2013 status = util_scan_parse_mbssid(pdev, frame, frame_len, 2014 frm_subtype, rx_param, 2015 scan_list); 2016 2017 if (QDF_IS_STATUS_ERROR(status)) 2018 scm_debug_rl("Failed to create a scan entry"); 2019 2020 return status; 2021 } 2022 2023 qdf_list_t * 2024 util_scan_unpack_beacon_frame(struct wlan_objmgr_pdev *pdev, uint8_t *frame, 2025 qdf_size_t frame_len, uint32_t frm_subtype, 2026 struct mgmt_rx_event_params *rx_param) 2027 { 2028 qdf_list_t *scan_list; 2029 QDF_STATUS status; 2030 2031 scan_list = qdf_mem_malloc_atomic(sizeof(*scan_list)); 2032 if (!scan_list) { 2033 scm_err("failed to allocate scan_list"); 2034 return NULL; 2035 } 2036 qdf_list_create(scan_list, MAX_SCAN_CACHE_SIZE); 2037 2038 status = util_scan_parse_beacon_frame(pdev, frame, frame_len, 2039 frm_subtype, rx_param, 2040 scan_list); 2041 if (QDF_IS_STATUS_ERROR(status)) { 2042 ucfg_scan_purge_results(scan_list); 2043 return NULL; 2044 } 2045 2046 return scan_list; 2047 } 2048 2049 QDF_STATUS 2050 util_scan_entry_update_mlme_info(struct wlan_objmgr_pdev *pdev, 2051 struct scan_cache_entry *scan_entry) 2052 { 2053 2054 if (!pdev || !scan_entry) { 2055 scm_err("pdev 0x%pK, scan_entry: 0x%pK", pdev, scan_entry); 2056 return QDF_STATUS_E_INVAL; 2057 } 2058 2059 return scm_update_scan_mlme_info(pdev, scan_entry); 2060 } 2061 2062 bool util_is_scan_completed(struct scan_event *event, bool *success) 2063 { 2064 if ((event->type == SCAN_EVENT_TYPE_COMPLETED) || 2065 (event->type == SCAN_EVENT_TYPE_DEQUEUED) || 2066 (event->type == SCAN_EVENT_TYPE_START_FAILED)) { 2067 if ((event->type == SCAN_EVENT_TYPE_COMPLETED) && 2068 (event->reason == SCAN_REASON_COMPLETED)) 2069 *success = true; 2070 else 2071 *success = false; 2072 2073 return true; 2074 } 2075 2076 *success = false; 2077 return false; 2078 } 2079 2080