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_BSSSID_S_SSID: 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 qdf_mem_copy(&rnr->short_ssid, &data[7], SHORT_SSID_LEN); 682 break; 683 684 case TBTT_NEIGHBOR_AP_BSSID_S_SSID_BSS_PARAM: 685 rnr->channel_number = ap_info->channel_number; 686 rnr->operating_class = ap_info->operting_class; 687 qdf_mem_copy(&rnr->bssid, &data[1], QDF_MAC_ADDR_SIZE); 688 qdf_mem_copy(&rnr->short_ssid, &data[7], SHORT_SSID_LEN); 689 rnr->bss_params = data[11]; 690 break; 691 692 default: 693 scm_debug("Wrong fieldtype"); 694 } 695 696 return QDF_STATUS_SUCCESS; 697 } 698 699 static QDF_STATUS 700 util_scan_parse_rnr_ie(struct scan_cache_entry *scan_entry, 701 struct ie_header *ie) 702 { 703 uint32_t rnr_ie_len; 704 uint16_t tbtt_count, tbtt_length, i, fieldtype; 705 uint8_t *data; 706 struct neighbor_ap_info_field *neighbor_ap_info; 707 708 rnr_ie_len = ie->ie_len; 709 data = (uint8_t *)ie + sizeof(struct ie_header); 710 711 while (data < ((uint8_t *)ie + rnr_ie_len + 2)) { 712 neighbor_ap_info = (struct neighbor_ap_info_field *)data; 713 tbtt_count = neighbor_ap_info->tbtt_header.tbtt_info_count; 714 tbtt_length = neighbor_ap_info->tbtt_header.tbtt_info_length; 715 fieldtype = neighbor_ap_info->tbtt_header.tbbt_info_fieldtype; 716 scm_debug("channel number %d, op class %d", 717 neighbor_ap_info->channel_number, 718 neighbor_ap_info->operting_class); 719 scm_debug("tbtt_count %d, tbtt_length %d, fieldtype %d", 720 tbtt_count, tbtt_length, fieldtype); 721 data += sizeof(struct neighbor_ap_info_field); 722 for (i = 0; i < (tbtt_count + 1) ; i++) { 723 if (i < MAX_RNR_BSS) 724 util_scan_update_rnr( 725 &scan_entry->rnr.bss_info[i], 726 neighbor_ap_info, 727 data); 728 data += tbtt_length; 729 } 730 } 731 732 return QDF_STATUS_SUCCESS; 733 } 734 735 static QDF_STATUS 736 util_scan_parse_extn_ie(struct scan_cache_entry *scan_params, 737 struct ie_header *ie) 738 { 739 struct extn_ie_header *extn_ie = (struct extn_ie_header *) ie; 740 741 switch (extn_ie->ie_extn_id) { 742 case WLAN_EXTN_ELEMID_MAX_CHAN_SWITCH_TIME: 743 scan_params->ie_list.mcst = (uint8_t *)ie; 744 break; 745 case WLAN_EXTN_ELEMID_SRP: 746 scan_params->ie_list.srp = (uint8_t *)ie; 747 break; 748 case WLAN_EXTN_ELEMID_HECAP: 749 scan_params->ie_list.hecap = (uint8_t *)ie; 750 break; 751 case WLAN_EXTN_ELEMID_HEOP: 752 scan_params->ie_list.heop = (uint8_t *)ie; 753 break; 754 case WLAN_EXTN_ELEMID_ESP: 755 scan_params->ie_list.esp = (uint8_t *)ie; 756 break; 757 case WLAN_EXTN_ELEMID_MUEDCA: 758 scan_params->ie_list.muedca = (uint8_t *)ie; 759 break; 760 case WLAN_EXTN_ELEMID_HE_6G_CAP: 761 scan_params->ie_list.hecap_6g = (uint8_t *)ie; 762 break; 763 default: 764 break; 765 } 766 return QDF_STATUS_SUCCESS; 767 } 768 769 static QDF_STATUS 770 util_scan_parse_vendor_ie(struct scan_cache_entry *scan_params, 771 struct ie_header *ie) 772 { 773 if (!scan_params->ie_list.vendor) 774 scan_params->ie_list.vendor = (uint8_t *)ie; 775 776 if (is_wpa_oui((uint8_t *)ie)) { 777 scan_params->ie_list.wpa = (uint8_t *)ie; 778 } else if (is_wps_oui((uint8_t *)ie)) { 779 scan_params->ie_list.wps = (uint8_t *)ie; 780 /* WCN IE should be a subset of WPS IE */ 781 if (is_wcn_oui((uint8_t *)ie)) 782 scan_params->ie_list.wcn = (uint8_t *)ie; 783 } else if (is_wme_param((uint8_t *)ie)) { 784 scan_params->ie_list.wmeparam = (uint8_t *)ie; 785 } else if (is_wme_info((uint8_t *)ie)) { 786 scan_params->ie_list.wmeinfo = (uint8_t *)ie; 787 } else if (is_atheros_oui((uint8_t *)ie)) { 788 scan_params->ie_list.athcaps = (uint8_t *)ie; 789 } else if (is_atheros_extcap_oui((uint8_t *)ie)) { 790 scan_params->ie_list.athextcaps = (uint8_t *)ie; 791 } else if (is_sfa_oui((uint8_t *)ie)) { 792 scan_params->ie_list.sfa = (uint8_t *)ie; 793 } else if (is_p2p_oui((uint8_t *)ie)) { 794 scan_params->ie_list.p2p = (uint8_t *)ie; 795 } else if (is_qca_son_oui((uint8_t *)ie, 796 QCA_OUI_WHC_AP_INFO_SUBTYPE)) { 797 scan_params->ie_list.sonadv = (uint8_t *)ie; 798 } else if (is_ht_cap((uint8_t *)ie)) { 799 /* we only care if there isn't already an HT IE (ANA) */ 800 if (!scan_params->ie_list.htcap) { 801 if (ie->ie_len != (WLAN_VENDOR_HT_IE_OFFSET_LEN + 802 sizeof(struct htcap_cmn_ie))) 803 return QDF_STATUS_E_INVAL; 804 scan_params->ie_list.htcap = 805 (uint8_t *)&(((struct wlan_vendor_ie_htcap *)ie)->ie); 806 } 807 } else if (is_ht_info((uint8_t *)ie)) { 808 /* we only care if there isn't already an HT IE (ANA) */ 809 if (!scan_params->ie_list.htinfo) { 810 if (ie->ie_len != WLAN_VENDOR_HT_IE_OFFSET_LEN + 811 sizeof(struct wlan_ie_htinfo_cmn)) 812 return QDF_STATUS_E_INVAL; 813 scan_params->ie_list.htinfo = 814 (uint8_t *)&(((struct wlan_vendor_ie_htinfo *) 815 ie)->hi_ie); 816 } 817 } else if (is_interop_vht((uint8_t *)ie) && 818 !(scan_params->ie_list.vhtcap)) { 819 uint8_t *vendor_ie = (uint8_t *)(ie); 820 821 if (ie->ie_len < ((WLAN_VENDOR_VHTCAP_IE_OFFSET + 822 sizeof(struct wlan_ie_vhtcaps)) - 823 sizeof(struct ie_header))) 824 return QDF_STATUS_E_INVAL; 825 vendor_ie = ((uint8_t *)(ie)) + WLAN_VENDOR_VHTCAP_IE_OFFSET; 826 if (vendor_ie[1] != (sizeof(struct wlan_ie_vhtcaps)) - 827 sizeof(struct ie_header)) 828 return QDF_STATUS_E_INVAL; 829 /* location where Interop Vht Cap IE and VHT OP IE Present */ 830 scan_params->ie_list.vhtcap = (((uint8_t *)(ie)) + 831 WLAN_VENDOR_VHTCAP_IE_OFFSET); 832 if (ie->ie_len > ((WLAN_VENDOR_VHTCAP_IE_OFFSET + 833 sizeof(struct wlan_ie_vhtcaps)) - 834 sizeof(struct ie_header))) { 835 if (ie->ie_len < ((WLAN_VENDOR_VHTOP_IE_OFFSET + 836 sizeof(struct wlan_ie_vhtop)) - 837 sizeof(struct ie_header))) 838 return QDF_STATUS_E_INVAL; 839 vendor_ie = ((uint8_t *)(ie)) + 840 WLAN_VENDOR_VHTOP_IE_OFFSET; 841 if (vendor_ie[1] != (sizeof(struct wlan_ie_vhtop) - 842 sizeof(struct ie_header))) 843 return QDF_STATUS_E_INVAL; 844 scan_params->ie_list.vhtop = (((uint8_t *)(ie)) + 845 WLAN_VENDOR_VHTOP_IE_OFFSET); 846 } 847 } else if (is_bwnss_oui((uint8_t *)ie)) { 848 /* 849 * Bandwidth-NSS map has sub-type & version. 850 * hence copy data just after version byte 851 */ 852 scan_params->ie_list.bwnss_map = (((uint8_t *)ie) + 8); 853 } else if (is_mbo_oce_oui((uint8_t *)ie)) { 854 scan_params->ie_list.mbo_oce = (uint8_t *)ie; 855 } else if (is_extender_oui((uint8_t *)ie)) { 856 scan_params->ie_list.extender = (uint8_t *)ie; 857 } else if (is_adaptive_11r_oui((uint8_t *)ie)) { 858 if ((ie->ie_len < OUI_LENGTH) || 859 (ie->ie_len > MAX_ADAPTIVE_11R_IE_LEN)) 860 return QDF_STATUS_E_INVAL; 861 862 scan_params->ie_list.adaptive_11r = (uint8_t *)ie + 863 sizeof(struct ie_header); 864 } else if (is_sae_single_pmk_oui((uint8_t *)ie)) { 865 if ((ie->ie_len < OUI_LENGTH) || 866 (ie->ie_len > MAX_SAE_SINGLE_PMK_IE_LEN)) { 867 scm_debug("Invalid sae single pmk OUI"); 868 return QDF_STATUS_E_INVAL; 869 } 870 scan_params->ie_list.single_pmk = (uint8_t *)ie + 871 sizeof(struct ie_header); 872 } 873 return QDF_STATUS_SUCCESS; 874 } 875 876 static QDF_STATUS 877 util_scan_populate_bcn_ie_list(struct wlan_objmgr_pdev *pdev, 878 struct scan_cache_entry *scan_params, 879 qdf_freq_t *chan_freq, uint8_t band_mask) 880 { 881 struct ie_header *ie, *sub_ie; 882 uint32_t ie_len, sub_ie_len; 883 QDF_STATUS status; 884 uint8_t chan_idx; 885 struct wlan_scan_obj *scan_obj; 886 struct wlan_objmgr_psoc *psoc; 887 888 psoc = wlan_pdev_get_psoc(pdev); 889 if (!psoc) { 890 scm_err("psoc is NULL"); 891 return QDF_STATUS_E_INVAL; 892 } 893 894 scan_obj = wlan_psoc_get_scan_obj(psoc); 895 if (!scan_obj) { 896 scm_err("scan_obj is NULL"); 897 return QDF_STATUS_E_INVAL; 898 } 899 900 ie_len = util_scan_entry_ie_len(scan_params); 901 ie = (struct ie_header *) 902 util_scan_entry_ie_data(scan_params); 903 904 while (ie_len >= sizeof(struct ie_header)) { 905 ie_len -= sizeof(struct ie_header); 906 907 if (!ie->ie_len) { 908 ie += 1; 909 continue; 910 } 911 912 if (ie_len < ie->ie_len) { 913 scm_debug("Incomplete corrupted IE:%x", 914 ie->ie_id); 915 return QDF_STATUS_E_INVAL; 916 } 917 918 switch (ie->ie_id) { 919 case WLAN_ELEMID_SSID: 920 if (ie->ie_len > (sizeof(struct ie_ssid) - 921 sizeof(struct ie_header))) 922 goto err; 923 scan_params->ie_list.ssid = (uint8_t *)ie; 924 break; 925 case WLAN_ELEMID_RATES: 926 if (ie->ie_len > WLAN_SUPPORTED_RATES_IE_MAX_LEN) 927 goto err; 928 scan_params->ie_list.rates = (uint8_t *)ie; 929 break; 930 case WLAN_ELEMID_DSPARMS: 931 if (ie->ie_len != WLAN_DS_PARAM_IE_MAX_LEN) 932 return QDF_STATUS_E_INVAL; 933 scan_params->ie_list.ds_param = (uint8_t *)ie; 934 chan_idx = 935 ((struct ds_ie *)ie)->cur_chan; 936 *chan_freq = wlan_reg_chan_band_to_freq(pdev, chan_idx, 937 band_mask); 938 /* Drop if invalid freq */ 939 if (scan_obj->drop_bcn_on_invalid_freq && 940 wlan_reg_is_disable_for_freq(pdev, *chan_freq)) { 941 scm_debug_rl("%pM: Drop as invalid channel %d freq %d in DS IE", 942 scan_params->bssid.bytes, 943 chan_idx, *chan_freq); 944 return QDF_STATUS_E_INVAL; 945 } 946 break; 947 case WLAN_ELEMID_TIM: 948 if (ie->ie_len < WLAN_TIM_IE_MIN_LENGTH) 949 goto err; 950 scan_params->ie_list.tim = (uint8_t *)ie; 951 scan_params->dtim_period = 952 ((struct wlan_tim_ie *)ie)->tim_period; 953 break; 954 case WLAN_ELEMID_COUNTRY: 955 if (ie->ie_len < WLAN_COUNTRY_IE_MIN_LEN) 956 goto err; 957 scan_params->ie_list.country = (uint8_t *)ie; 958 break; 959 case WLAN_ELEMID_QBSS_LOAD: 960 if (ie->ie_len != sizeof(struct qbss_load_ie) - 961 sizeof(struct ie_header)) { 962 /* 963 * Expected QBSS IE length is 5Bytes; For some 964 * old cisco AP, QBSS IE length is 4Bytes, which 965 * doesn't match with latest spec, So ignore 966 * QBSS IE in such case. 967 */ 968 break; 969 } 970 scan_params->ie_list.qbssload = (uint8_t *)ie; 971 break; 972 case WLAN_ELEMID_CHANSWITCHANN: 973 if (ie->ie_len != WLAN_CSA_IE_MAX_LEN) 974 goto err; 975 scan_params->ie_list.csa = (uint8_t *)ie; 976 break; 977 case WLAN_ELEMID_IBSSDFS: 978 if (ie->ie_len < WLAN_IBSSDFS_IE_MIN_LEN) 979 goto err; 980 scan_params->ie_list.ibssdfs = (uint8_t *)ie; 981 break; 982 case WLAN_ELEMID_QUIET: 983 if (ie->ie_len != WLAN_QUIET_IE_MAX_LEN) 984 goto err; 985 scan_params->ie_list.quiet = (uint8_t *)ie; 986 break; 987 case WLAN_ELEMID_ERP: 988 if (ie->ie_len != (sizeof(struct erp_ie) - 989 sizeof(struct ie_header))) 990 goto err; 991 scan_params->erp = ((struct erp_ie *)ie)->value; 992 break; 993 case WLAN_ELEMID_HTCAP_ANA: 994 if (ie->ie_len != sizeof(struct htcap_cmn_ie)) 995 goto err; 996 scan_params->ie_list.htcap = 997 (uint8_t *)&(((struct htcap_ie *)ie)->ie); 998 break; 999 case WLAN_ELEMID_RSN: 1000 if (ie->ie_len < WLAN_RSN_IE_MIN_LEN) 1001 goto err; 1002 scan_params->ie_list.rsn = (uint8_t *)ie; 1003 break; 1004 case WLAN_ELEMID_XRATES: 1005 scan_params->ie_list.xrates = (uint8_t *)ie; 1006 break; 1007 case WLAN_ELEMID_EXTCHANSWITCHANN: 1008 if (ie->ie_len != WLAN_XCSA_IE_MAX_LEN) 1009 goto err; 1010 scan_params->ie_list.xcsa = (uint8_t *)ie; 1011 break; 1012 case WLAN_ELEMID_SECCHANOFFSET: 1013 if (ie->ie_len != WLAN_SECCHANOFF_IE_MAX_LEN) 1014 goto err; 1015 scan_params->ie_list.secchanoff = (uint8_t *)ie; 1016 break; 1017 case WLAN_ELEMID_HTINFO_ANA: 1018 if (ie->ie_len != sizeof(struct wlan_ie_htinfo_cmn)) 1019 goto err; 1020 scan_params->ie_list.htinfo = 1021 (uint8_t *)&(((struct wlan_ie_htinfo *) ie)->hi_ie); 1022 chan_idx = ((struct wlan_ie_htinfo_cmn *) 1023 (scan_params->ie_list.htinfo))->hi_ctrlchannel; 1024 *chan_freq = wlan_reg_chan_band_to_freq(pdev, chan_idx, 1025 band_mask); 1026 /* Drop if invalid freq */ 1027 if (scan_obj->drop_bcn_on_invalid_freq && 1028 wlan_reg_is_disable_for_freq(pdev, *chan_freq)) { 1029 scm_debug_rl("%pM: Drop as invalid channel %d freq %d in HT_INFO IE", 1030 scan_params->bssid.bytes, 1031 chan_idx, *chan_freq); 1032 return QDF_STATUS_E_INVAL; 1033 } 1034 break; 1035 case WLAN_ELEMID_WAPI: 1036 if (ie->ie_len < WLAN_WAPI_IE_MIN_LEN) 1037 goto err; 1038 scan_params->ie_list.wapi = (uint8_t *)ie; 1039 break; 1040 case WLAN_ELEMID_XCAPS: 1041 if (ie->ie_len > WLAN_EXTCAP_IE_MAX_LEN) 1042 goto err; 1043 scan_params->ie_list.extcaps = (uint8_t *)ie; 1044 break; 1045 case WLAN_ELEMID_VHTCAP: 1046 if (ie->ie_len != (sizeof(struct wlan_ie_vhtcaps) - 1047 sizeof(struct ie_header))) 1048 goto err; 1049 scan_params->ie_list.vhtcap = (uint8_t *)ie; 1050 break; 1051 case WLAN_ELEMID_VHTOP: 1052 if (ie->ie_len != (sizeof(struct wlan_ie_vhtop) - 1053 sizeof(struct ie_header))) 1054 goto err; 1055 scan_params->ie_list.vhtop = (uint8_t *)ie; 1056 break; 1057 case WLAN_ELEMID_OP_MODE_NOTIFY: 1058 if (ie->ie_len != WLAN_OPMODE_IE_MAX_LEN) 1059 goto err; 1060 scan_params->ie_list.opmode = (uint8_t *)ie; 1061 break; 1062 case WLAN_ELEMID_MOBILITY_DOMAIN: 1063 if (ie->ie_len != WLAN_MOBILITY_DOMAIN_IE_MAX_LEN) 1064 goto err; 1065 scan_params->ie_list.mdie = (uint8_t *)ie; 1066 break; 1067 case WLAN_ELEMID_VENDOR: 1068 status = util_scan_parse_vendor_ie(scan_params, 1069 ie); 1070 if (QDF_IS_STATUS_ERROR(status)) 1071 goto err_status; 1072 break; 1073 case WLAN_ELEMID_CHAN_SWITCH_WRAP: 1074 scan_params->ie_list.cswrp = (uint8_t *)ie; 1075 /* Go to next sub IE */ 1076 sub_ie = (struct ie_header *) 1077 (((uint8_t *)ie) + sizeof(struct ie_header)); 1078 sub_ie_len = ie->ie_len; 1079 status = 1080 util_scan_parse_chan_switch_wrapper_ie( 1081 scan_params, sub_ie, sub_ie_len); 1082 if (QDF_IS_STATUS_ERROR(status)) { 1083 goto err_status; 1084 } 1085 break; 1086 case WLAN_ELEMID_FILS_INDICATION: 1087 if (ie->ie_len < WLAN_FILS_INDICATION_IE_MIN_LEN) 1088 goto err; 1089 scan_params->ie_list.fils_indication = (uint8_t *)ie; 1090 break; 1091 case WLAN_ELEMID_EXTN_ELEM: 1092 status = util_scan_parse_extn_ie(scan_params, ie); 1093 if (QDF_IS_STATUS_ERROR(status)) 1094 goto err_status; 1095 break; 1096 case WLAN_ELEMID_REDUCED_NEIGHBOR_REPORT: 1097 if (ie->ie_len < WLAN_RNR_IE_MIN_LEN) 1098 goto err; 1099 scan_params->ie_list.rnrie = (uint8_t *)ie; 1100 status = util_scan_parse_rnr_ie(scan_params, ie); 1101 if (QDF_IS_STATUS_ERROR(status)) 1102 goto err_status; 1103 break; 1104 default: 1105 break; 1106 } 1107 1108 /* Consume info element */ 1109 ie_len -= ie->ie_len; 1110 /* Go to next IE */ 1111 ie = (struct ie_header *) 1112 (((uint8_t *) ie) + 1113 sizeof(struct ie_header) + 1114 ie->ie_len); 1115 } 1116 1117 return QDF_STATUS_SUCCESS; 1118 1119 err: 1120 status = QDF_STATUS_E_INVAL; 1121 err_status: 1122 scm_debug("failed to parse IE - id: %d, len: %d", 1123 ie->ie_id, ie->ie_len); 1124 1125 return status; 1126 } 1127 1128 /** 1129 * util_scan_update_esp_data: update ESP params from beacon/probe response 1130 * @esp_information: pointer to wlan_esp_information 1131 * @scan_entry: new received entry 1132 * 1133 * The Estimated Service Parameters element is 1134 * used by a AP to provide information to another STA which 1135 * can then use the information as input to an algorithm to 1136 * generate an estimate of throughput between the two STAs. 1137 * The ESP Information List field contains from 1 to 4 ESP 1138 * Information fields(each field 24 bits), each corresponding 1139 * to an access category for which estimated service parameters 1140 * information is provided. 1141 * 1142 * Return: None 1143 */ 1144 static void util_scan_update_esp_data(struct wlan_esp_ie *esp_information, 1145 struct scan_cache_entry *scan_entry) 1146 { 1147 1148 uint8_t *data; 1149 int i = 0; 1150 uint64_t total_elements; 1151 struct wlan_esp_info *esp_info; 1152 struct wlan_esp_ie *esp_ie; 1153 1154 esp_ie = (struct wlan_esp_ie *) 1155 util_scan_entry_esp_info(scan_entry); 1156 1157 total_elements = esp_ie->esp_len; 1158 data = (uint8_t *)esp_ie + 3; 1159 do_div(total_elements, ESP_INFORMATION_LIST_LENGTH); 1160 1161 if (total_elements > MAX_ESP_INFORMATION_FIELD) { 1162 scm_err("No of Air time fractions are greater than supported"); 1163 return; 1164 } 1165 1166 for (i = 0; i < total_elements; i++) { 1167 esp_info = (struct wlan_esp_info *)data; 1168 if (esp_info->access_category == ESP_AC_BK) { 1169 qdf_mem_copy(&esp_information->esp_info_AC_BK, 1170 data, 3); 1171 data = data + ESP_INFORMATION_LIST_LENGTH; 1172 continue; 1173 } 1174 if (esp_info->access_category == ESP_AC_BE) { 1175 qdf_mem_copy(&esp_information->esp_info_AC_BE, 1176 data, 3); 1177 data = data + ESP_INFORMATION_LIST_LENGTH; 1178 continue; 1179 } 1180 if (esp_info->access_category == ESP_AC_VI) { 1181 qdf_mem_copy(&esp_information->esp_info_AC_VI, 1182 data, 3); 1183 data = data + ESP_INFORMATION_LIST_LENGTH; 1184 continue; 1185 } 1186 if (esp_info->access_category == ESP_AC_VO) { 1187 qdf_mem_copy(&esp_information->esp_info_AC_VO, 1188 data, 3); 1189 data = data + ESP_INFORMATION_LIST_LENGTH; 1190 break; 1191 } 1192 } 1193 } 1194 1195 /** 1196 * util_scan_scm_update_bss_with_esp_dataa: calculate estimated air time 1197 * fraction 1198 * @scan_entry: new received entry 1199 * 1200 * This function process all Access category ESP params and provide 1201 * best effort air time fraction. 1202 * If best effort is not available, it will choose VI, VO and BK in sequence 1203 * 1204 */ 1205 static void util_scan_scm_update_bss_with_esp_data( 1206 struct scan_cache_entry *scan_entry) 1207 { 1208 uint8_t air_time_fraction = 0; 1209 struct wlan_esp_ie esp_information; 1210 1211 if (!scan_entry->ie_list.esp) 1212 return; 1213 1214 util_scan_update_esp_data(&esp_information, scan_entry); 1215 1216 /* 1217 * If the ESP metric is transmitting multiple airtime fractions, then 1218 * follow the sequence AC_BE, AC_VI, AC_VO, AC_BK and pick whichever is 1219 * the first one available 1220 */ 1221 if (esp_information.esp_info_AC_BE.access_category 1222 == ESP_AC_BE) 1223 air_time_fraction = 1224 esp_information.esp_info_AC_BE. 1225 estimated_air_fraction; 1226 else if (esp_information.esp_info_AC_VI.access_category 1227 == ESP_AC_VI) 1228 air_time_fraction = 1229 esp_information.esp_info_AC_VI. 1230 estimated_air_fraction; 1231 else if (esp_information.esp_info_AC_VO.access_category 1232 == ESP_AC_VO) 1233 air_time_fraction = 1234 esp_information.esp_info_AC_VO. 1235 estimated_air_fraction; 1236 else if (esp_information.esp_info_AC_BK.access_category 1237 == ESP_AC_BK) 1238 air_time_fraction = 1239 esp_information.esp_info_AC_BK. 1240 estimated_air_fraction; 1241 scan_entry->air_time_fraction = air_time_fraction; 1242 } 1243 1244 /** 1245 * util_scan_scm_calc_nss_supported_by_ap() - finds out nss from AP 1246 * @scan_entry: new received entry 1247 * 1248 * Return: number of nss advertised by AP 1249 */ 1250 static int util_scan_scm_calc_nss_supported_by_ap( 1251 struct scan_cache_entry *scan_params) 1252 { 1253 struct htcap_cmn_ie *htcap; 1254 struct wlan_ie_vhtcaps *vhtcaps; 1255 uint8_t rx_mcs_map; 1256 1257 htcap = (struct htcap_cmn_ie *) 1258 util_scan_entry_htcap(scan_params); 1259 vhtcaps = (struct wlan_ie_vhtcaps *) 1260 util_scan_entry_vhtcap(scan_params); 1261 if (vhtcaps) { 1262 rx_mcs_map = vhtcaps->rx_mcs_map; 1263 if ((rx_mcs_map & 0xC0) != 0xC0) 1264 return 4; 1265 1266 if ((rx_mcs_map & 0x30) != 0x30) 1267 return 3; 1268 1269 if ((rx_mcs_map & 0x0C) != 0x0C) 1270 return 2; 1271 } else if (htcap) { 1272 if (htcap->mcsset[3]) 1273 return 4; 1274 1275 if (htcap->mcsset[2]) 1276 return 3; 1277 1278 if (htcap->mcsset[1]) 1279 return 2; 1280 1281 } 1282 return 1; 1283 } 1284 1285 #ifdef WLAN_DFS_CHAN_HIDDEN_SSID 1286 QDF_STATUS 1287 util_scan_add_hidden_ssid(struct wlan_objmgr_pdev *pdev, qdf_nbuf_t bcnbuf) 1288 { 1289 struct wlan_frame_hdr *hdr; 1290 struct wlan_bcn_frame *bcn; 1291 struct wlan_scan_obj *scan_obj; 1292 struct wlan_ssid *conf_ssid; 1293 struct ie_header *ie; 1294 uint32_t frame_len = qdf_nbuf_len(bcnbuf); 1295 uint16_t bcn_ie_offset, ssid_ie_start_offset, ssid_ie_end_offset; 1296 uint16_t tmplen, ie_length; 1297 uint8_t *pbeacon, *tmp; 1298 bool set_ssid_flag = false; 1299 struct ie_ssid *ssid; 1300 uint8_t pdev_id; 1301 1302 if (!pdev) { 1303 scm_warn("pdev: 0x%pK is NULL", pdev); 1304 return QDF_STATUS_E_NULL_VALUE; 1305 } 1306 pdev_id = wlan_objmgr_pdev_get_pdev_id(pdev); 1307 scan_obj = wlan_pdev_get_scan_obj(pdev); 1308 if (!scan_obj) { 1309 scm_warn("null scan_obj"); 1310 return QDF_STATUS_E_NULL_VALUE; 1311 } 1312 1313 conf_ssid = &scan_obj->pdev_info[pdev_id].conf_ssid; 1314 1315 hdr = (struct wlan_frame_hdr *)qdf_nbuf_data(bcnbuf); 1316 1317 /* received bssid does not match configured bssid */ 1318 if (qdf_mem_cmp(hdr->i_addr3, scan_obj->pdev_info[pdev_id].conf_bssid, 1319 QDF_MAC_ADDR_SIZE) || 1320 conf_ssid->length == 0) { 1321 return QDF_STATUS_SUCCESS; 1322 } 1323 1324 bcn = (struct wlan_bcn_frame *)(qdf_nbuf_data(bcnbuf) + sizeof(*hdr)); 1325 pbeacon = (uint8_t *)bcn; 1326 1327 ie = (struct ie_header *)(pbeacon + 1328 offsetof(struct wlan_bcn_frame, ie)); 1329 1330 bcn_ie_offset = offsetof(struct wlan_bcn_frame, ie); 1331 ie_length = (uint16_t)(frame_len - sizeof(*hdr) - 1332 bcn_ie_offset); 1333 1334 while (ie_length >= sizeof(struct ie_header)) { 1335 ie_length -= sizeof(struct ie_header); 1336 1337 bcn_ie_offset += sizeof(struct ie_header); 1338 1339 if (ie_length < ie->ie_len) { 1340 scm_debug("Incomplete corrupted IE:%x", ie->ie_id); 1341 return QDF_STATUS_E_INVAL; 1342 } 1343 if (ie->ie_id == WLAN_ELEMID_SSID) { 1344 if (ie->ie_len > (sizeof(struct ie_ssid) - 1345 sizeof(struct ie_header))) { 1346 return QDF_STATUS_E_INVAL; 1347 } 1348 ssid = (struct ie_ssid *)ie; 1349 if (util_scan_is_hidden_ssid(ssid)) { 1350 set_ssid_flag = true; 1351 ssid_ie_start_offset = bcn_ie_offset - 1352 sizeof(struct ie_header); 1353 ssid_ie_end_offset = bcn_ie_offset + 1354 ie->ie_len; 1355 } 1356 } 1357 if (ie->ie_len == 0) { 1358 ie += 1; /* next IE */ 1359 continue; 1360 } 1361 if (ie->ie_id == WLAN_ELEMID_VENDOR && 1362 is_wps_oui((uint8_t *)ie)) { 1363 set_ssid_flag = false; 1364 break; 1365 } 1366 /* Consume info element */ 1367 ie_length -= ie->ie_len; 1368 /* Go to next IE */ 1369 ie = (struct ie_header *)(((uint8_t *)ie) + 1370 sizeof(struct ie_header) + 1371 ie->ie_len); 1372 } 1373 1374 if (set_ssid_flag) { 1375 /* Hidden SSID if the Length is 0 */ 1376 if (!ssid->ssid_len) { 1377 /* increase the taillength by length of ssid */ 1378 if (qdf_nbuf_put_tail(bcnbuf, 1379 conf_ssid->length) == NULL) { 1380 scm_debug("No enough tailroom"); 1381 return QDF_STATUS_E_NOMEM; 1382 } 1383 /* length of the buffer to be copied */ 1384 tmplen = frame_len - 1385 sizeof(*hdr) - ssid_ie_end_offset; 1386 /* 1387 * tmp memory to copy the beacon info 1388 * after ssid ie. 1389 */ 1390 tmp = qdf_mem_malloc(tmplen * sizeof(u_int8_t)); 1391 if (!tmp) 1392 return QDF_STATUS_E_NOMEM; 1393 1394 /* Copy beacon data after ssid ie to tmp */ 1395 qdf_nbuf_copy_bits(bcnbuf, (sizeof(*hdr) + 1396 ssid_ie_end_offset), tmplen, tmp); 1397 /* Add ssid length */ 1398 *(pbeacon + (ssid_ie_start_offset + 1)) 1399 = conf_ssid->length; 1400 /* Insert the SSID string */ 1401 qdf_mem_copy((pbeacon + ssid_ie_end_offset), 1402 conf_ssid->ssid, conf_ssid->length); 1403 /* Copy rest of the beacon data */ 1404 qdf_mem_copy((pbeacon + ssid_ie_end_offset + 1405 conf_ssid->length), tmp, tmplen); 1406 qdf_mem_free(tmp); 1407 1408 /* Hidden ssid with all 0's */ 1409 } else if (ssid->ssid_len == conf_ssid->length) { 1410 /* Insert the SSID string */ 1411 qdf_mem_copy((pbeacon + ssid_ie_start_offset + 1412 sizeof(struct ie_header)), 1413 conf_ssid->ssid, conf_ssid->length); 1414 } else { 1415 scm_debug("mismatch in hidden ssid length"); 1416 return QDF_STATUS_E_INVAL; 1417 } 1418 } 1419 return QDF_STATUS_SUCCESS; 1420 } 1421 #endif /* WLAN_DFS_CHAN_HIDDEN_SSID */ 1422 1423 #ifdef WLAN_ADAPTIVE_11R 1424 /** 1425 * scm_fill_adaptive_11r_cap() - Check if the AP supports adaptive 11r 1426 * @scan_entry: Pointer to the scan entry 1427 * 1428 * Return: true if adaptive 11r is advertised else false 1429 */ 1430 static void scm_fill_adaptive_11r_cap(struct scan_cache_entry *scan_entry) 1431 { 1432 uint8_t *ie; 1433 uint8_t data; 1434 bool adaptive_11r; 1435 1436 ie = util_scan_entry_adaptive_11r(scan_entry); 1437 if (!ie) 1438 return; 1439 1440 data = *(ie + OUI_LENGTH); 1441 adaptive_11r = (data & 0x1) ? true : false; 1442 1443 scan_entry->adaptive_11r_ap = adaptive_11r; 1444 } 1445 #else 1446 static void scm_fill_adaptive_11r_cap(struct scan_cache_entry *scan_entry) 1447 { 1448 scan_entry->adaptive_11r_ap = false; 1449 } 1450 #endif 1451 1452 static void util_scan_set_security(struct scan_cache_entry *scan_params) 1453 { 1454 if (util_scan_entry_wpa(scan_params)) 1455 scan_params->security_type |= SCAN_SECURITY_TYPE_WPA; 1456 1457 if (util_scan_entry_rsn(scan_params)) 1458 scan_params->security_type |= SCAN_SECURITY_TYPE_RSN; 1459 if (util_scan_entry_wapi(scan_params)) 1460 scan_params->security_type |= SCAN_SECURITY_TYPE_WAPI; 1461 1462 if (!scan_params->security_type && 1463 scan_params->cap_info.wlan_caps.privacy) 1464 scan_params->security_type |= SCAN_SECURITY_TYPE_WEP; 1465 } 1466 1467 static QDF_STATUS 1468 util_scan_gen_scan_entry(struct wlan_objmgr_pdev *pdev, 1469 uint8_t *frame, qdf_size_t frame_len, 1470 uint32_t frm_subtype, 1471 struct mgmt_rx_event_params *rx_param, 1472 struct scan_mbssid_info *mbssid_info, 1473 qdf_list_t *scan_list) 1474 { 1475 struct wlan_frame_hdr *hdr; 1476 struct wlan_bcn_frame *bcn; 1477 QDF_STATUS status = QDF_STATUS_SUCCESS; 1478 struct ie_ssid *ssid; 1479 struct scan_cache_entry *scan_entry; 1480 struct qbss_load_ie *qbss_load; 1481 struct scan_cache_node *scan_node; 1482 uint8_t i; 1483 qdf_freq_t chan_freq = 0; 1484 bool he_6g_dup_bcon = false; 1485 uint8_t band_mask; 1486 1487 scan_entry = qdf_mem_malloc_atomic(sizeof(*scan_entry)); 1488 if (!scan_entry) { 1489 scm_err("failed to allocate memory for scan_entry"); 1490 return QDF_STATUS_E_NOMEM; 1491 } 1492 scan_entry->raw_frame.ptr = 1493 qdf_mem_malloc_atomic(frame_len); 1494 if (!scan_entry->raw_frame.ptr) { 1495 scm_err("failed to allocate memory for frame"); 1496 qdf_mem_free(scan_entry); 1497 return QDF_STATUS_E_NOMEM; 1498 } 1499 1500 bcn = (struct wlan_bcn_frame *) 1501 (frame + sizeof(*hdr)); 1502 hdr = (struct wlan_frame_hdr *)frame; 1503 1504 /* update timestamp in nanoseconds needed by kernel layers */ 1505 scan_entry->boottime_ns = qdf_get_bootbased_boottime_ns(); 1506 1507 scan_entry->frm_subtype = frm_subtype; 1508 qdf_mem_copy(scan_entry->bssid.bytes, 1509 hdr->i_addr3, QDF_MAC_ADDR_SIZE); 1510 /* Scr addr */ 1511 qdf_mem_copy(scan_entry->mac_addr.bytes, 1512 hdr->i_addr2, QDF_MAC_ADDR_SIZE); 1513 scan_entry->seq_num = 1514 (le16toh(*(uint16_t *)hdr->i_seq) >> WLAN_SEQ_SEQ_SHIFT); 1515 1516 scan_entry->snr = rx_param->snr; 1517 scan_entry->avg_snr = WLAN_SNR_IN(scan_entry->snr); 1518 scan_entry->rssi_raw = rx_param->rssi; 1519 scan_entry->avg_rssi = WLAN_RSSI_IN(scan_entry->rssi_raw); 1520 scan_entry->tsf_delta = rx_param->tsf_delta; 1521 scan_entry->pdev_id = wlan_objmgr_pdev_get_pdev_id(pdev); 1522 1523 /* Copy per chain rssi to scan entry */ 1524 qdf_mem_copy(scan_entry->per_chain_rssi, rx_param->rssi_ctl, 1525 WLAN_MGMT_TXRX_HOST_MAX_ANTENNA); 1526 band_mask = BIT(wlan_reg_freq_to_band(rx_param->chan_freq)); 1527 1528 if (!wlan_psoc_nif_fw_ext_cap_get(wlan_pdev_get_psoc(pdev), 1529 WLAN_SOC_CEXT_HW_DB2DBM)) { 1530 for (i = 0; i < WLAN_MGMT_TXRX_HOST_MAX_ANTENNA; i++) { 1531 if (scan_entry->per_chain_rssi[i] != 1532 WLAN_INVALID_PER_CHAIN_SNR) 1533 scan_entry->per_chain_rssi[i] += 1534 WLAN_NOISE_FLOOR_DBM_DEFAULT; 1535 else 1536 scan_entry->per_chain_rssi[i] = 1537 WLAN_INVALID_PER_CHAIN_RSSI; 1538 } 1539 } 1540 1541 /* store jiffies */ 1542 scan_entry->rrm_parent_tsf = (uint32_t)qdf_system_ticks(); 1543 1544 scan_entry->bcn_int = le16toh(bcn->beacon_interval); 1545 1546 /* 1547 * In case if the beacon dosnt have 1548 * valid beacon interval falback to def 1549 */ 1550 if (!scan_entry->bcn_int) 1551 scan_entry->bcn_int = 100; 1552 scan_entry->cap_info.value = le16toh(bcn->capability.value); 1553 qdf_mem_copy(scan_entry->tsf_info.data, 1554 bcn->timestamp, 8); 1555 scan_entry->erp = ERP_NON_ERP_PRESENT; 1556 1557 scan_entry->scan_entry_time = 1558 qdf_mc_timer_get_system_time(); 1559 1560 scan_entry->raw_frame.len = frame_len; 1561 qdf_mem_copy(scan_entry->raw_frame.ptr, 1562 frame, frame_len); 1563 status = util_scan_populate_bcn_ie_list(pdev, scan_entry, &chan_freq, 1564 band_mask); 1565 if (QDF_IS_STATUS_ERROR(status)) { 1566 scm_debug("%pM: failed to parse beacon IE", 1567 scan_entry->bssid.bytes); 1568 qdf_mem_free(scan_entry->raw_frame.ptr); 1569 qdf_mem_free(scan_entry); 1570 return QDF_STATUS_E_FAILURE; 1571 } 1572 1573 ssid = (struct ie_ssid *) 1574 scan_entry->ie_list.ssid; 1575 1576 if (ssid && (ssid->ssid_len > WLAN_SSID_MAX_LEN)) { 1577 qdf_mem_free(scan_entry->raw_frame.ptr); 1578 qdf_mem_free(scan_entry); 1579 return QDF_STATUS_E_FAILURE; 1580 } 1581 1582 if (scan_entry->ie_list.p2p) 1583 scan_entry->is_p2p = true; 1584 1585 if (!chan_freq && util_scan_entry_hecap(scan_entry)) { 1586 status = util_scan_get_chan_from_he_6g_params(pdev, scan_entry, 1587 &chan_freq, 1588 &he_6g_dup_bcon, 1589 band_mask); 1590 if (QDF_IS_STATUS_ERROR(status)) { 1591 qdf_mem_free(scan_entry->raw_frame.ptr); 1592 qdf_mem_free(scan_entry); 1593 return QDF_STATUS_E_FAILURE; 1594 } 1595 } 1596 1597 if (chan_freq) 1598 scan_entry->channel.chan_freq = chan_freq; 1599 1600 /* If no channel info is present in beacon use meta channel */ 1601 if (!scan_entry->channel.chan_freq) { 1602 scan_entry->channel.chan_freq = rx_param->chan_freq; 1603 } else if (rx_param->chan_freq != 1604 scan_entry->channel.chan_freq) { 1605 if (!wlan_reg_is_49ghz_freq(scan_entry->channel.chan_freq) && 1606 !he_6g_dup_bcon) 1607 scan_entry->channel_mismatch = true; 1608 } 1609 1610 if (util_scan_is_hidden_ssid(ssid)) { 1611 scan_entry->ie_list.ssid = NULL; 1612 scan_entry->is_hidden_ssid = true; 1613 } else { 1614 qdf_mem_copy(scan_entry->ssid.ssid, 1615 ssid->ssid, ssid->ssid_len); 1616 scan_entry->ssid.length = ssid->ssid_len; 1617 scan_entry->hidden_ssid_timestamp = 1618 scan_entry->scan_entry_time; 1619 } 1620 qdf_mem_copy(&scan_entry->mbssid_info, mbssid_info, 1621 sizeof(scan_entry->mbssid_info)); 1622 1623 scan_entry->phy_mode = util_scan_get_phymode(pdev, scan_entry); 1624 1625 scan_entry->nss = util_scan_scm_calc_nss_supported_by_ap(scan_entry); 1626 scm_fill_adaptive_11r_cap(scan_entry); 1627 util_scan_set_security(scan_entry); 1628 1629 util_scan_scm_update_bss_with_esp_data(scan_entry); 1630 qbss_load = (struct qbss_load_ie *) 1631 util_scan_entry_qbssload(scan_entry); 1632 if (qbss_load) 1633 scan_entry->qbss_chan_load = qbss_load->qbss_chan_load; 1634 1635 scan_node = qdf_mem_malloc_atomic(sizeof(*scan_node)); 1636 if (!scan_node) { 1637 qdf_mem_free(scan_entry->raw_frame.ptr); 1638 qdf_mem_free(scan_entry); 1639 return QDF_STATUS_E_FAILURE; 1640 } 1641 1642 scan_node->entry = scan_entry; 1643 qdf_list_insert_front(scan_list, &scan_node->node); 1644 1645 return status; 1646 } 1647 1648 /** 1649 * util_scan_find_ie() - find information element 1650 * @eid: element id 1651 * @ies: pointer consisting of IEs 1652 * @len: IE length 1653 * 1654 * Return: NULL if the element ID is not found or 1655 * a pointer to the first byte of the requested 1656 * element 1657 */ 1658 static uint8_t *util_scan_find_ie(uint8_t eid, uint8_t *ies, 1659 int32_t len) 1660 { 1661 while (len >= 2 && len >= ies[1] + 2) { 1662 if (ies[0] == eid) 1663 return ies; 1664 len -= ies[1] + 2; 1665 ies += ies[1] + 2; 1666 } 1667 1668 return NULL; 1669 } 1670 1671 #ifdef WLAN_FEATURE_MBSSID 1672 static void util_gen_new_bssid(uint8_t *bssid, uint8_t max_bssid, 1673 uint8_t mbssid_index, 1674 uint8_t *new_bssid_addr) 1675 { 1676 uint8_t lsb_n; 1677 int i; 1678 1679 for (i = 0; i < QDF_MAC_ADDR_SIZE; i++) 1680 new_bssid_addr[i] = bssid[i]; 1681 1682 lsb_n = new_bssid_addr[5] & ((1 << max_bssid) - 1); 1683 1684 new_bssid_addr[5] &= ~((1 << max_bssid) - 1); 1685 new_bssid_addr[5] |= (lsb_n + mbssid_index) % (1 << max_bssid); 1686 } 1687 1688 static uint32_t util_gen_new_ie(uint8_t *ie, uint32_t ielen, 1689 uint8_t *subelement, 1690 size_t subie_len, uint8_t *new_ie) 1691 { 1692 uint8_t *pos, *tmp; 1693 const uint8_t *tmp_old, *tmp_new; 1694 uint8_t *sub_copy; 1695 1696 /* copy subelement as we need to change its content to 1697 * mark an ie after it is processed. 1698 */ 1699 sub_copy = qdf_mem_malloc(subie_len); 1700 if (!sub_copy) 1701 return 0; 1702 qdf_mem_copy(sub_copy, subelement, subie_len); 1703 1704 pos = &new_ie[0]; 1705 1706 /* new ssid */ 1707 tmp_new = util_scan_find_ie(WLAN_ELEMID_SSID, sub_copy, subie_len); 1708 if (tmp_new) { 1709 qdf_mem_copy(pos, tmp_new, tmp_new[1] + 2); 1710 pos += (tmp_new[1] + 2); 1711 } 1712 1713 /* go through IEs in ie (skip SSID) and subelement, 1714 * merge them into new_ie 1715 */ 1716 tmp_old = util_scan_find_ie(WLAN_ELEMID_SSID, ie, ielen); 1717 tmp_old = (tmp_old) ? tmp_old + tmp_old[1] + 2 : ie; 1718 1719 while (tmp_old + tmp_old[1] + 2 - ie <= ielen) { 1720 if (tmp_old[0] == 0) { 1721 tmp_old++; 1722 continue; 1723 } 1724 1725 tmp = (uint8_t *)util_scan_find_ie(tmp_old[0], sub_copy, 1726 subie_len); 1727 if (!tmp) { 1728 /* ie in old ie but not in subelement */ 1729 if (tmp_old[0] != WLAN_ELEMID_MULTIPLE_BSSID) { 1730 qdf_mem_copy(pos, tmp_old, tmp_old[1] + 2); 1731 pos += tmp_old[1] + 2; 1732 } 1733 } else { 1734 /* ie in transmitting ie also in subelement, 1735 * copy from subelement and flag the ie in subelement 1736 * as copied (by setting eid field to 0xff). For 1737 * vendor ie, compare OUI + type + subType to 1738 * determine if they are the same ie. 1739 */ 1740 if (tmp_old[0] == WLAN_ELEMID_VENDOR) { 1741 if (!qdf_mem_cmp(tmp_old + 2, tmp + 2, 5)) { 1742 /* same vendor ie, copy from 1743 * subelement 1744 */ 1745 qdf_mem_copy(pos, tmp, tmp[1] + 2); 1746 pos += tmp[1] + 2; 1747 tmp[0] = 0xff; 1748 } else { 1749 qdf_mem_copy(pos, tmp_old, 1750 tmp_old[1] + 2); 1751 pos += tmp_old[1] + 2; 1752 } 1753 } else { 1754 /* copy ie from subelement into new ie */ 1755 qdf_mem_copy(pos, tmp, tmp[1] + 2); 1756 pos += tmp[1] + 2; 1757 tmp[0] = 0xff; 1758 } 1759 } 1760 1761 if (tmp_old + tmp_old[1] + 2 - ie == ielen) 1762 break; 1763 1764 tmp_old += tmp_old[1] + 2; 1765 } 1766 1767 /* go through subelement again to check if there is any ie not 1768 * copied to new ie, skip ssid, capability, bssid-index ie 1769 */ 1770 tmp_new = sub_copy; 1771 while (tmp_new + tmp_new[1] + 2 - sub_copy <= subie_len) { 1772 if (!(tmp_new[0] == WLAN_ELEMID_NONTX_BSSID_CAP || 1773 tmp_new[0] == WLAN_ELEMID_SSID || 1774 tmp_new[0] == WLAN_ELEMID_MULTI_BSSID_IDX || 1775 tmp_new[0] == 0xff)) { 1776 qdf_mem_copy(pos, tmp_new, tmp_new[1] + 2); 1777 pos += tmp_new[1] + 2; 1778 } 1779 if (tmp_new + tmp_new[1] + 2 - sub_copy == subie_len) 1780 break; 1781 tmp_new += tmp_new[1] + 2; 1782 } 1783 1784 qdf_mem_free(sub_copy); 1785 return pos - new_ie; 1786 } 1787 1788 static QDF_STATUS util_scan_parse_mbssid(struct wlan_objmgr_pdev *pdev, 1789 uint8_t *frame, qdf_size_t frame_len, 1790 uint32_t frm_subtype, 1791 struct mgmt_rx_event_params *rx_param, 1792 qdf_list_t *scan_list) 1793 { 1794 struct wlan_bcn_frame *bcn; 1795 struct wlan_frame_hdr *hdr; 1796 struct scan_mbssid_info mbssid_info; 1797 QDF_STATUS status; 1798 uint8_t *pos, *subelement, *mbssid_end_pos; 1799 uint8_t *tmp, *mbssid_index_ie; 1800 uint32_t subie_len, new_ie_len; 1801 uint8_t new_bssid[QDF_MAC_ADDR_SIZE], bssid[QDF_MAC_ADDR_SIZE]; 1802 uint8_t *new_ie; 1803 uint8_t *ie, *new_frame = NULL; 1804 uint64_t ielen, new_frame_len; 1805 1806 hdr = (struct wlan_frame_hdr *)frame; 1807 bcn = (struct wlan_bcn_frame *)(frame + sizeof(struct wlan_frame_hdr)); 1808 ie = (uint8_t *)&bcn->ie; 1809 ielen = (uint16_t)(frame_len - 1810 sizeof(struct wlan_frame_hdr) - 1811 offsetof(struct wlan_bcn_frame, ie)); 1812 qdf_mem_copy(bssid, hdr->i_addr3, QDF_MAC_ADDR_SIZE); 1813 1814 if (!util_scan_find_ie(WLAN_ELEMID_MULTIPLE_BSSID, ie, ielen)) 1815 return QDF_STATUS_E_FAILURE; 1816 1817 pos = ie; 1818 1819 new_ie = qdf_mem_malloc(MAX_IE_LEN); 1820 if (!new_ie) 1821 return QDF_STATUS_E_NOMEM; 1822 1823 while (pos < ie + ielen + 2) { 1824 tmp = util_scan_find_ie(WLAN_ELEMID_MULTIPLE_BSSID, pos, 1825 ielen - (pos - ie)); 1826 if (!tmp) 1827 break; 1828 1829 mbssid_info.profile_count = 1 << tmp[2]; 1830 mbssid_end_pos = tmp + tmp[1] + 2; 1831 /* Skip Element ID, Len, MaxBSSID Indicator */ 1832 if (tmp[1] < 4) 1833 break; 1834 for (subelement = tmp + 3; subelement < mbssid_end_pos - 1; 1835 subelement += 2 + subelement[1]) { 1836 subie_len = subelement[1]; 1837 if (mbssid_end_pos - subelement < 2 + subie_len) 1838 break; 1839 if (subelement[0] != 0 || subelement[1] < 4) { 1840 /* not a valid BSS profile */ 1841 continue; 1842 } 1843 1844 if (subelement[2] != WLAN_ELEMID_NONTX_BSSID_CAP || 1845 subelement[3] != 2) { 1846 /* The first element within the Nontransmitted 1847 * BSSID Profile is not the Nontransmitted 1848 * BSSID Capability element. 1849 */ 1850 continue; 1851 } 1852 1853 /* found a Nontransmitted BSSID Profile */ 1854 mbssid_index_ie = 1855 util_scan_find_ie(WLAN_ELEMID_MULTI_BSSID_IDX, 1856 subelement + 2, subie_len); 1857 if (!mbssid_index_ie || mbssid_index_ie[1] < 1 || 1858 mbssid_index_ie[2] == 0) { 1859 /* No valid Multiple BSSID-Index element */ 1860 continue; 1861 } 1862 qdf_mem_copy(&mbssid_info.trans_bssid, bssid, 1863 QDF_MAC_ADDR_SIZE); 1864 mbssid_info.profile_num = mbssid_index_ie[2]; 1865 util_gen_new_bssid(bssid, tmp[2], mbssid_index_ie[2], 1866 new_bssid); 1867 new_ie_len = util_gen_new_ie(ie, ielen, subelement + 2, 1868 subie_len, new_ie); 1869 if (!new_ie_len) 1870 continue; 1871 1872 new_frame_len = frame_len - ielen + new_ie_len; 1873 new_frame = qdf_mem_malloc(new_frame_len); 1874 if (!new_frame) { 1875 qdf_mem_free(new_ie); 1876 return QDF_STATUS_E_NOMEM; 1877 } 1878 1879 /* 1880 * Copy the header(24byte), timestamp(8 byte), 1881 * beaconinterval(2byte) and capability(2byte) 1882 */ 1883 qdf_mem_copy(new_frame, frame, 36); 1884 /* Copy the new ie generated from MBSSID profile*/ 1885 hdr = (struct wlan_frame_hdr *)new_frame; 1886 qdf_mem_copy(hdr->i_addr2, new_bssid, 1887 QDF_MAC_ADDR_SIZE); 1888 qdf_mem_copy(hdr->i_addr3, new_bssid, 1889 QDF_MAC_ADDR_SIZE); 1890 /* Copy the new ie generated from MBSSID profile*/ 1891 qdf_mem_copy(new_frame + 1892 offsetof(struct wlan_bcn_frame, ie) + 1893 sizeof(struct wlan_frame_hdr), 1894 new_ie, new_ie_len); 1895 status = util_scan_gen_scan_entry(pdev, new_frame, 1896 new_frame_len, 1897 frm_subtype, 1898 rx_param, 1899 &mbssid_info, 1900 scan_list); 1901 if (QDF_IS_STATUS_ERROR(status)) { 1902 qdf_mem_free(new_frame); 1903 scm_err("failed to generate a scan entry"); 1904 break; 1905 } 1906 /* scan entry makes its own copy so free the frame*/ 1907 qdf_mem_free(new_frame); 1908 } 1909 1910 pos = mbssid_end_pos; 1911 } 1912 qdf_mem_free(new_ie); 1913 1914 return QDF_STATUS_SUCCESS; 1915 } 1916 #else 1917 static QDF_STATUS util_scan_parse_mbssid(struct wlan_objmgr_pdev *pdev, 1918 uint8_t *frame, qdf_size_t frame_len, 1919 uint32_t frm_subtype, 1920 struct mgmt_rx_event_params *rx_param, 1921 qdf_list_t *scan_list) 1922 { 1923 return QDF_STATUS_SUCCESS; 1924 } 1925 #endif 1926 1927 static QDF_STATUS 1928 util_scan_parse_beacon_frame(struct wlan_objmgr_pdev *pdev, 1929 uint8_t *frame, 1930 qdf_size_t frame_len, 1931 uint32_t frm_subtype, 1932 struct mgmt_rx_event_params *rx_param, 1933 qdf_list_t *scan_list) 1934 { 1935 struct wlan_bcn_frame *bcn; 1936 struct wlan_frame_hdr *hdr; 1937 uint8_t *mbssid_ie = NULL; 1938 uint32_t ie_len = 0; 1939 QDF_STATUS status; 1940 struct scan_mbssid_info mbssid_info = { 0 }; 1941 1942 hdr = (struct wlan_frame_hdr *)frame; 1943 bcn = (struct wlan_bcn_frame *) 1944 (frame + sizeof(struct wlan_frame_hdr)); 1945 ie_len = (uint16_t)(frame_len - 1946 sizeof(struct wlan_frame_hdr) - 1947 offsetof(struct wlan_bcn_frame, ie)); 1948 1949 mbssid_ie = util_scan_find_ie(WLAN_ELEMID_MULTIPLE_BSSID, 1950 (uint8_t *)&bcn->ie, ie_len); 1951 if (mbssid_ie) { 1952 qdf_mem_copy(&mbssid_info.trans_bssid, 1953 hdr->i_addr3, QDF_MAC_ADDR_SIZE); 1954 mbssid_info.profile_count = 1 << mbssid_ie[2]; 1955 } 1956 1957 status = util_scan_gen_scan_entry(pdev, frame, frame_len, 1958 frm_subtype, rx_param, 1959 &mbssid_info, 1960 scan_list); 1961 1962 /* 1963 * IF MBSSID IE is present in the beacon then 1964 * scan component will create a new entry for 1965 * each BSSID found in the MBSSID 1966 */ 1967 if (mbssid_ie) 1968 status = util_scan_parse_mbssid(pdev, frame, frame_len, 1969 frm_subtype, rx_param, 1970 scan_list); 1971 1972 if (QDF_IS_STATUS_ERROR(status)) 1973 scm_debug_rl("Failed to create a scan entry"); 1974 1975 return status; 1976 } 1977 1978 qdf_list_t * 1979 util_scan_unpack_beacon_frame(struct wlan_objmgr_pdev *pdev, uint8_t *frame, 1980 qdf_size_t frame_len, uint32_t frm_subtype, 1981 struct mgmt_rx_event_params *rx_param) 1982 { 1983 qdf_list_t *scan_list; 1984 QDF_STATUS status; 1985 1986 scan_list = qdf_mem_malloc_atomic(sizeof(*scan_list)); 1987 if (!scan_list) { 1988 scm_err("failed to allocate scan_list"); 1989 return NULL; 1990 } 1991 qdf_list_create(scan_list, MAX_SCAN_CACHE_SIZE); 1992 1993 status = util_scan_parse_beacon_frame(pdev, frame, frame_len, 1994 frm_subtype, rx_param, 1995 scan_list); 1996 if (QDF_IS_STATUS_ERROR(status)) { 1997 ucfg_scan_purge_results(scan_list); 1998 return NULL; 1999 } 2000 2001 return scan_list; 2002 } 2003 2004 QDF_STATUS 2005 util_scan_entry_update_mlme_info(struct wlan_objmgr_pdev *pdev, 2006 struct scan_cache_entry *scan_entry) 2007 { 2008 2009 if (!pdev || !scan_entry) { 2010 scm_err("pdev 0x%pK, scan_entry: 0x%pK", pdev, scan_entry); 2011 return QDF_STATUS_E_INVAL; 2012 } 2013 2014 return scm_update_scan_mlme_info(pdev, scan_entry); 2015 } 2016 2017 bool util_is_scan_completed(struct scan_event *event, bool *success) 2018 { 2019 if ((event->type == SCAN_EVENT_TYPE_COMPLETED) || 2020 (event->type == SCAN_EVENT_TYPE_DEQUEUED) || 2021 (event->type == SCAN_EVENT_TYPE_START_FAILED)) { 2022 if ((event->type == SCAN_EVENT_TYPE_COMPLETED) && 2023 (event->reason == SCAN_REASON_COMPLETED)) 2024 *success = true; 2025 else 2026 *success = false; 2027 2028 return true; 2029 } 2030 2031 *success = false; 2032 return false; 2033 } 2034 2035