1/* 2 * NXP Wireless LAN device driver: scan ioctl and command handling 3 * 4 * Copyright 2011-2020 NXP 5 * 6 * This software file (the "File") is distributed by NXP 7 * under the terms of the GNU General Public License Version 2, June 1991 8 * (the "License"). You may use, redistribute and/or modify this File in 9 * accordance with the terms and conditions of the License, a copy of which 10 * is available by writing to the Free Software Foundation, Inc., 11 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the 12 * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt. 13 * 14 * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE 16 * ARE EXPRESSLY DISCLAIMED. The License provides additional details about 17 * this warranty disclaimer. 18 */ 19 20#include "decl.h" 21#include "ioctl.h" 22#include "util.h" 23#include "fw.h" 24#include "main.h" 25#include "11n.h" 26#include "cfg80211.h" 27 28/* The maximum number of channels the firmware can scan per command */ 29#define MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN 14 30 31#define MWIFIEX_DEF_CHANNELS_PER_SCAN_CMD 4 32 33/* Memory needed to store a max sized Channel List TLV for a firmware scan */ 34#define CHAN_TLV_MAX_SIZE (sizeof(struct mwifiex_ie_types_header) \ 35 + (MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN \ 36 *sizeof(struct mwifiex_chan_scan_param_set))) 37 38/* Memory needed to store supported rate */ 39#define RATE_TLV_MAX_SIZE (sizeof(struct mwifiex_ie_types_rates_param_set) \ 40 + HOSTCMD_SUPPORTED_RATES) 41 42/* Memory needed to store a max number/size WildCard SSID TLV for a firmware 43 scan */ 44#define WILDCARD_SSID_TLV_MAX_SIZE \ 45 (MWIFIEX_MAX_SSID_LIST_LENGTH * \ 46 (sizeof(struct mwifiex_ie_types_wildcard_ssid_params) \ 47 + IEEE80211_MAX_SSID_LEN)) 48 49/* Maximum memory needed for a mwifiex_scan_cmd_config with all TLVs at max */ 50#define MAX_SCAN_CFG_ALLOC (sizeof(struct mwifiex_scan_cmd_config) \ 51 + sizeof(struct mwifiex_ie_types_num_probes) \ 52 + sizeof(struct mwifiex_ie_types_htcap) \ 53 + CHAN_TLV_MAX_SIZE \ 54 + RATE_TLV_MAX_SIZE \ 55 + WILDCARD_SSID_TLV_MAX_SIZE) 56 57 58union mwifiex_scan_cmd_config_tlv { 59 /* Scan configuration (variable length) */ 60 struct mwifiex_scan_cmd_config config; 61 /* Max allocated block */ 62 u8 config_alloc_buf[MAX_SCAN_CFG_ALLOC]; 63}; 64 65enum cipher_suite { 66 CIPHER_SUITE_TKIP, 67 CIPHER_SUITE_CCMP, 68 CIPHER_SUITE_MAX 69}; 70static u8 mwifiex_wpa_oui[CIPHER_SUITE_MAX][4] = { 71 { 0x00, 0x50, 0xf2, 0x02 }, /* TKIP */ 72 { 0x00, 0x50, 0xf2, 0x04 }, /* AES */ 73}; 74static u8 mwifiex_rsn_oui[CIPHER_SUITE_MAX][4] = { 75 { 0x00, 0x0f, 0xac, 0x02 }, /* TKIP */ 76 { 0x00, 0x0f, 0xac, 0x04 }, /* AES */ 77}; 78 79static void 80_dbg_security_flags(int log_level, const char *func, const char *desc, 81 struct mwifiex_private *priv, 82 struct mwifiex_bssdescriptor *bss_desc) 83{ 84 _mwifiex_dbg(priv->adapter, log_level, 85 "info: %s: %s:\twpa_ie=%#x wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s\tEncMode=%#x privacy=%#x\n", 86 func, desc, 87 bss_desc->bcn_wpa_ie ? 88 bss_desc->bcn_wpa_ie->vend_hdr.element_id : 0, 89 bss_desc->bcn_rsn_ie ? 90 bss_desc->bcn_rsn_ie->ieee_hdr.element_id : 0, 91 priv->sec_info.wep_enabled ? "e" : "d", 92 priv->sec_info.wpa_enabled ? "e" : "d", 93 priv->sec_info.wpa2_enabled ? "e" : "d", 94 priv->sec_info.encryption_mode, 95 bss_desc->privacy); 96} 97#define dbg_security_flags(mask, desc, priv, bss_desc) \ 98 _dbg_security_flags(MWIFIEX_DBG_##mask, desc, __func__, priv, bss_desc) 99 100static bool 101has_ieee_hdr(struct ieee_types_generic *ie, u8 key) 102{ 103 return (ie && ie->ieee_hdr.element_id == key); 104} 105 106static bool 107has_vendor_hdr(struct ieee_types_vendor_specific *ie, u8 key) 108{ 109 return (ie && ie->vend_hdr.element_id == key); 110} 111 112/* 113 * This function parses a given IE for a given OUI. 114 * 115 * This is used to parse a WPA/RSN IE to find if it has 116 * a given oui in PTK. 117 */ 118static u8 119mwifiex_search_oui_in_ie(struct ie_body *iebody, u8 *oui) 120{ 121 u8 count; 122 123 count = iebody->ptk_cnt[0]; 124 125 /* There could be multiple OUIs for PTK hence 126 1) Take the length. 127 2) Check all the OUIs for AES. 128 3) If one of them is AES then pass success. */ 129 while (count) { 130 if (!memcmp(iebody->ptk_body, oui, sizeof(iebody->ptk_body))) 131 return MWIFIEX_OUI_PRESENT; 132 133 --count; 134 if (count) 135 iebody = (struct ie_body *) ((u8 *) iebody + 136 sizeof(iebody->ptk_body)); 137 } 138 139 pr_debug("info: %s: OUI is not found in PTK\n", __func__); 140 return MWIFIEX_OUI_NOT_PRESENT; 141} 142 143/* 144 * This function checks if a given OUI is present in a RSN IE. 145 * 146 * The function first checks if a RSN IE is present or not in the 147 * BSS descriptor. It tries to locate the OUI only if such an IE is 148 * present. 149 */ 150static u8 151mwifiex_is_rsn_oui_present(struct mwifiex_bssdescriptor *bss_desc, u32 cipher) 152{ 153 u8 *oui; 154 struct ie_body *iebody; 155 u8 ret = MWIFIEX_OUI_NOT_PRESENT; 156 157 if (has_ieee_hdr(bss_desc->bcn_rsn_ie, WLAN_EID_RSN)) { 158 iebody = (struct ie_body *) 159 (((u8 *) bss_desc->bcn_rsn_ie->data) + 160 RSN_GTK_OUI_OFFSET); 161 oui = &mwifiex_rsn_oui[cipher][0]; 162 ret = mwifiex_search_oui_in_ie(iebody, oui); 163 if (ret) 164 return ret; 165 } 166 return ret; 167} 168 169/* 170 * This function checks if a given OUI is present in a WPA IE. 171 * 172 * The function first checks if a WPA IE is present or not in the 173 * BSS descriptor. It tries to locate the OUI only if such an IE is 174 * present. 175 */ 176static u8 177mwifiex_is_wpa_oui_present(struct mwifiex_bssdescriptor *bss_desc, u32 cipher) 178{ 179 u8 *oui; 180 struct ie_body *iebody; 181 u8 ret = MWIFIEX_OUI_NOT_PRESENT; 182 183 if (has_vendor_hdr(bss_desc->bcn_wpa_ie, WLAN_EID_VENDOR_SPECIFIC)) { 184 iebody = (struct ie_body *)((u8 *)bss_desc->bcn_wpa_ie->data + 185 WPA_GTK_OUI_OFFSET); 186 oui = &mwifiex_wpa_oui[cipher][0]; 187 ret = mwifiex_search_oui_in_ie(iebody, oui); 188 if (ret) 189 return ret; 190 } 191 return ret; 192} 193 194/* 195 * This function compares two SSIDs and checks if they match. 196 */ 197s32 198mwifiex_ssid_cmp(struct cfg80211_ssid *ssid1, struct cfg80211_ssid *ssid2) 199{ 200 if (!ssid1 || !ssid2 || (ssid1->ssid_len != ssid2->ssid_len)) 201 return -1; 202 return memcmp(ssid1->ssid, ssid2->ssid, ssid1->ssid_len); 203} 204 205/* 206 * This function checks if wapi is enabled in driver and scanned network is 207 * compatible with it. 208 */ 209static bool 210mwifiex_is_bss_wapi(struct mwifiex_private *priv, 211 struct mwifiex_bssdescriptor *bss_desc) 212{ 213 if (priv->sec_info.wapi_enabled && 214 has_ieee_hdr(bss_desc->bcn_wapi_ie, WLAN_EID_BSS_AC_ACCESS_DELAY)) 215 return true; 216 return false; 217} 218 219/* 220 * This function checks if driver is configured with no security mode and 221 * scanned network is compatible with it. 222 */ 223static bool 224mwifiex_is_bss_no_sec(struct mwifiex_private *priv, 225 struct mwifiex_bssdescriptor *bss_desc) 226{ 227 if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled && 228 !priv->sec_info.wpa2_enabled && 229 !has_vendor_hdr(bss_desc->bcn_wpa_ie, WLAN_EID_VENDOR_SPECIFIC) && 230 !has_ieee_hdr(bss_desc->bcn_rsn_ie, WLAN_EID_RSN) && 231 !priv->sec_info.encryption_mode && !bss_desc->privacy) { 232 return true; 233 } 234 return false; 235} 236 237/* 238 * This function checks if static WEP is enabled in driver and scanned network 239 * is compatible with it. 240 */ 241static bool 242mwifiex_is_bss_static_wep(struct mwifiex_private *priv, 243 struct mwifiex_bssdescriptor *bss_desc) 244{ 245 if (priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled && 246 !priv->sec_info.wpa2_enabled && bss_desc->privacy) { 247 return true; 248 } 249 return false; 250} 251 252/* 253 * This function checks if wpa is enabled in driver and scanned network is 254 * compatible with it. 255 */ 256static bool 257mwifiex_is_bss_wpa(struct mwifiex_private *priv, 258 struct mwifiex_bssdescriptor *bss_desc) 259{ 260 if (!priv->sec_info.wep_enabled && priv->sec_info.wpa_enabled && 261 !priv->sec_info.wpa2_enabled && 262 has_vendor_hdr(bss_desc->bcn_wpa_ie, WLAN_EID_VENDOR_SPECIFIC) 263 /* 264 * Privacy bit may NOT be set in some APs like 265 * LinkSys WRT54G && bss_desc->privacy 266 */ 267 ) { 268 dbg_security_flags(INFO, "WPA", priv, bss_desc); 269 return true; 270 } 271 return false; 272} 273 274/* 275 * This function checks if wpa2 is enabled in driver and scanned network is 276 * compatible with it. 277 */ 278static bool 279mwifiex_is_bss_wpa2(struct mwifiex_private *priv, 280 struct mwifiex_bssdescriptor *bss_desc) 281{ 282 if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled && 283 priv->sec_info.wpa2_enabled && 284 has_ieee_hdr(bss_desc->bcn_rsn_ie, WLAN_EID_RSN)) { 285 /* 286 * Privacy bit may NOT be set in some APs like 287 * LinkSys WRT54G && bss_desc->privacy 288 */ 289 dbg_security_flags(INFO, "WAP2", priv, bss_desc); 290 return true; 291 } 292 return false; 293} 294 295/* 296 * This function checks if adhoc AES is enabled in driver and scanned network is 297 * compatible with it. 298 */ 299static bool 300mwifiex_is_bss_adhoc_aes(struct mwifiex_private *priv, 301 struct mwifiex_bssdescriptor *bss_desc) 302{ 303 if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled && 304 !priv->sec_info.wpa2_enabled && 305 !has_vendor_hdr(bss_desc->bcn_wpa_ie, WLAN_EID_VENDOR_SPECIFIC) && 306 !has_ieee_hdr(bss_desc->bcn_rsn_ie, WLAN_EID_RSN) && 307 !priv->sec_info.encryption_mode && bss_desc->privacy) { 308 return true; 309 } 310 return false; 311} 312 313/* 314 * This function checks if dynamic WEP is enabled in driver and scanned network 315 * is compatible with it. 316 */ 317static bool 318mwifiex_is_bss_dynamic_wep(struct mwifiex_private *priv, 319 struct mwifiex_bssdescriptor *bss_desc) 320{ 321 if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled && 322 !priv->sec_info.wpa2_enabled && 323 !has_vendor_hdr(bss_desc->bcn_wpa_ie, WLAN_EID_VENDOR_SPECIFIC) && 324 !has_ieee_hdr(bss_desc->bcn_rsn_ie, WLAN_EID_RSN) && 325 priv->sec_info.encryption_mode && bss_desc->privacy) { 326 dbg_security_flags(INFO, "dynamic", priv, bss_desc); 327 return true; 328 } 329 return false; 330} 331 332/* 333 * This function checks if a scanned network is compatible with the driver 334 * settings. 335 * 336 * WEP WPA WPA2 ad-hoc encrypt Network 337 * enabled enabled enabled AES mode Privacy WPA WPA2 Compatible 338 * 0 0 0 0 NONE 0 0 0 yes No security 339 * 0 1 0 0 x 1x 1 x yes WPA (disable 340 * HT if no AES) 341 * 0 0 1 0 x 1x x 1 yes WPA2 (disable 342 * HT if no AES) 343 * 0 0 0 1 NONE 1 0 0 yes Ad-hoc AES 344 * 1 0 0 0 NONE 1 0 0 yes Static WEP 345 * (disable HT) 346 * 0 0 0 0 !=NONE 1 0 0 yes Dynamic WEP 347 * 348 * Compatibility is not matched while roaming, except for mode. 349 */ 350static s32 351mwifiex_is_network_compatible(struct mwifiex_private *priv, 352 struct mwifiex_bssdescriptor *bss_desc, u32 mode) 353{ 354 struct mwifiex_adapter *adapter = priv->adapter; 355 356 bss_desc->disable_11n = false; 357 358 /* Don't check for compatibility if roaming */ 359 if (priv->media_connected && 360 (priv->bss_mode == NL80211_IFTYPE_STATION) && 361 (bss_desc->bss_mode == NL80211_IFTYPE_STATION)) 362 return 0; 363 364 if (priv->wps.session_enable) { 365 mwifiex_dbg(adapter, IOCTL, 366 "info: return success directly in WPS period\n"); 367 return 0; 368 } 369 370 if (bss_desc->chan_sw_ie_present) { 371 mwifiex_dbg(adapter, INFO, 372 "Don't connect to AP with WLAN_EID_CHANNEL_SWITCH\n"); 373 return -1; 374 } 375 376 if (mwifiex_is_bss_wapi(priv, bss_desc)) { 377 mwifiex_dbg(adapter, INFO, 378 "info: return success for WAPI AP\n"); 379 return 0; 380 } 381 382 if (bss_desc->bss_mode == mode) { 383 if (mwifiex_is_bss_no_sec(priv, bss_desc)) { 384 /* No security */ 385 return 0; 386 } else if (mwifiex_is_bss_static_wep(priv, bss_desc)) { 387 /* Static WEP enabled */ 388 mwifiex_dbg(adapter, INFO, 389 "info: Disable 11n in WEP mode.\n"); 390 bss_desc->disable_11n = true; 391 return 0; 392 } else if (mwifiex_is_bss_wpa(priv, bss_desc)) { 393 /* WPA enabled */ 394 if (((priv->adapter->config_bands & BAND_GN || 395 priv->adapter->config_bands & BAND_AN) && 396 bss_desc->bcn_ht_cap) && 397 !mwifiex_is_wpa_oui_present(bss_desc, 398 CIPHER_SUITE_CCMP)) { 399 400 if (mwifiex_is_wpa_oui_present 401 (bss_desc, CIPHER_SUITE_TKIP)) { 402 mwifiex_dbg(adapter, INFO, 403 "info: Disable 11n if AES\t" 404 "is not supported by AP\n"); 405 bss_desc->disable_11n = true; 406 } else { 407 return -1; 408 } 409 } 410 return 0; 411 } else if (mwifiex_is_bss_wpa2(priv, bss_desc)) { 412 /* WPA2 enabled */ 413 if (((priv->adapter->config_bands & BAND_GN || 414 priv->adapter->config_bands & BAND_AN) && 415 bss_desc->bcn_ht_cap) && 416 !mwifiex_is_rsn_oui_present(bss_desc, 417 CIPHER_SUITE_CCMP)) { 418 419 if (mwifiex_is_rsn_oui_present 420 (bss_desc, CIPHER_SUITE_TKIP)) { 421 mwifiex_dbg(adapter, INFO, 422 "info: Disable 11n if AES\t" 423 "is not supported by AP\n"); 424 bss_desc->disable_11n = true; 425 } else { 426 return -1; 427 } 428 } 429 return 0; 430 } else if (mwifiex_is_bss_adhoc_aes(priv, bss_desc)) { 431 /* Ad-hoc AES enabled */ 432 return 0; 433 } else if (mwifiex_is_bss_dynamic_wep(priv, bss_desc)) { 434 /* Dynamic WEP enabled */ 435 return 0; 436 } 437 438 /* Security doesn't match */ 439 dbg_security_flags(ERROR, "failed", priv, bss_desc); 440 return -1; 441 } 442 443 /* Mode doesn't match */ 444 return -1; 445} 446 447/* 448 * This function creates a channel list for the driver to scan, based 449 * on region/band information. 450 * 451 * This routine is used for any scan that is not provided with a 452 * specific channel list to scan. 453 */ 454static int 455mwifiex_scan_create_channel_list(struct mwifiex_private *priv, 456 const struct mwifiex_user_scan_cfg 457 *user_scan_in, 458 struct mwifiex_chan_scan_param_set 459 *scan_chan_list, 460 u8 filtered_scan) 461{ 462 enum nl80211_band band; 463 struct ieee80211_supported_band *sband; 464 struct ieee80211_channel *ch; 465 struct mwifiex_adapter *adapter = priv->adapter; 466 int chan_idx = 0, i; 467 468 for (band = 0; (band < NUM_NL80211_BANDS) ; band++) { 469 470 if (!priv->wdev.wiphy->bands[band]) 471 continue; 472 473 sband = priv->wdev.wiphy->bands[band]; 474 475 for (i = 0; (i < sband->n_channels) ; i++) { 476 ch = &sband->channels[i]; 477 if (ch->flags & IEEE80211_CHAN_DISABLED) 478 continue; 479 scan_chan_list[chan_idx].radio_type = band; 480 481 if (user_scan_in && 482 user_scan_in->chan_list[0].scan_time) 483 scan_chan_list[chan_idx].max_scan_time = 484 cpu_to_le16((u16) user_scan_in-> 485 chan_list[0].scan_time); 486 else if ((ch->flags & IEEE80211_CHAN_NO_IR) || 487 (ch->flags & IEEE80211_CHAN_RADAR)) 488 scan_chan_list[chan_idx].max_scan_time = 489 cpu_to_le16(adapter->passive_scan_time); 490 else 491 scan_chan_list[chan_idx].max_scan_time = 492 cpu_to_le16(adapter->active_scan_time); 493 494 if (ch->flags & IEEE80211_CHAN_NO_IR) 495 scan_chan_list[chan_idx].chan_scan_mode_bitmap 496 |= (MWIFIEX_PASSIVE_SCAN | 497 MWIFIEX_HIDDEN_SSID_REPORT); 498 else 499 scan_chan_list[chan_idx].chan_scan_mode_bitmap 500 &= ~MWIFIEX_PASSIVE_SCAN; 501 scan_chan_list[chan_idx].chan_number = 502 (u32) ch->hw_value; 503 504 scan_chan_list[chan_idx].chan_scan_mode_bitmap 505 |= MWIFIEX_DISABLE_CHAN_FILT; 506 507 if (filtered_scan && 508 !((ch->flags & IEEE80211_CHAN_NO_IR) || 509 (ch->flags & IEEE80211_CHAN_RADAR))) 510 scan_chan_list[chan_idx].max_scan_time = 511 cpu_to_le16(adapter->specific_scan_time); 512 513 chan_idx++; 514 } 515 516 } 517 return chan_idx; 518} 519 520/* This function creates a channel list tlv for bgscan config, based 521 * on region/band information. 522 */ 523static int 524mwifiex_bgscan_create_channel_list(struct mwifiex_private *priv, 525 const struct mwifiex_bg_scan_cfg 526 *bgscan_cfg_in, 527 struct mwifiex_chan_scan_param_set 528 *scan_chan_list) 529{ 530 enum nl80211_band band; 531 struct ieee80211_supported_band *sband; 532 struct ieee80211_channel *ch; 533 struct mwifiex_adapter *adapter = priv->adapter; 534 int chan_idx = 0, i; 535 536 for (band = 0; (band < NUM_NL80211_BANDS); band++) { 537 if (!priv->wdev.wiphy->bands[band]) 538 continue; 539 540 sband = priv->wdev.wiphy->bands[band]; 541 542 for (i = 0; (i < sband->n_channels) ; i++) { 543 ch = &sband->channels[i]; 544 if (ch->flags & IEEE80211_CHAN_DISABLED) 545 continue; 546 scan_chan_list[chan_idx].radio_type = band; 547 548 if (bgscan_cfg_in->chan_list[0].scan_time) 549 scan_chan_list[chan_idx].max_scan_time = 550 cpu_to_le16((u16)bgscan_cfg_in-> 551 chan_list[0].scan_time); 552 else if (ch->flags & IEEE80211_CHAN_NO_IR) 553 scan_chan_list[chan_idx].max_scan_time = 554 cpu_to_le16(adapter->passive_scan_time); 555 else 556 scan_chan_list[chan_idx].max_scan_time = 557 cpu_to_le16(adapter-> 558 specific_scan_time); 559 560 if (ch->flags & IEEE80211_CHAN_NO_IR) 561 scan_chan_list[chan_idx].chan_scan_mode_bitmap 562 |= MWIFIEX_PASSIVE_SCAN; 563 else 564 scan_chan_list[chan_idx].chan_scan_mode_bitmap 565 &= ~MWIFIEX_PASSIVE_SCAN; 566 567 scan_chan_list[chan_idx].chan_number = 568 (u32)ch->hw_value; 569 chan_idx++; 570 } 571 } 572 return chan_idx; 573} 574 575/* This function appends rate TLV to scan config command. */ 576static int 577mwifiex_append_rate_tlv(struct mwifiex_private *priv, 578 struct mwifiex_scan_cmd_config *scan_cfg_out, 579 u8 radio) 580{ 581 struct mwifiex_ie_types_rates_param_set *rates_tlv; 582 u8 rates[MWIFIEX_SUPPORTED_RATES], *tlv_pos; 583 u32 rates_size; 584 585 memset(rates, 0, sizeof(rates)); 586 587 tlv_pos = (u8 *)scan_cfg_out->tlv_buf + scan_cfg_out->tlv_buf_len; 588 589 if (priv->scan_request) 590 rates_size = mwifiex_get_rates_from_cfg80211(priv, rates, 591 radio); 592 else 593 rates_size = mwifiex_get_supported_rates(priv, rates); 594 595 mwifiex_dbg(priv->adapter, CMD, 596 "info: SCAN_CMD: Rates size = %d\n", 597 rates_size); 598 rates_tlv = (struct mwifiex_ie_types_rates_param_set *)tlv_pos; 599 rates_tlv->header.type = cpu_to_le16(WLAN_EID_SUPP_RATES); 600 rates_tlv->header.len = cpu_to_le16((u16) rates_size); 601 memcpy(rates_tlv->rates, rates, rates_size); 602 scan_cfg_out->tlv_buf_len += sizeof(rates_tlv->header) + rates_size; 603 604 return rates_size; 605} 606 607/* 608 * This function constructs and sends multiple scan config commands to 609 * the firmware. 610 * 611 * Previous routines in the code flow have created a scan command configuration 612 * with any requested TLVs. This function splits the channel TLV into maximum 613 * channels supported per scan lists and sends the portion of the channel TLV, 614 * along with the other TLVs, to the firmware. 615 */ 616static int 617mwifiex_scan_channel_list(struct mwifiex_private *priv, 618 u32 max_chan_per_scan, u8 filtered_scan, 619 struct mwifiex_scan_cmd_config *scan_cfg_out, 620 struct mwifiex_ie_types_chan_list_param_set 621 *chan_tlv_out, 622 struct mwifiex_chan_scan_param_set *scan_chan_list) 623{ 624 struct mwifiex_adapter *adapter = priv->adapter; 625 int ret = 0; 626 struct mwifiex_chan_scan_param_set *tmp_chan_list; 627 struct mwifiex_chan_scan_param_set *start_chan; 628 u32 tlv_idx, rates_size, cmd_no; 629 u32 total_scan_time; 630 u32 done_early; 631 u8 radio_type; 632 633 if (!scan_cfg_out || !chan_tlv_out || !scan_chan_list) { 634 mwifiex_dbg(priv->adapter, ERROR, 635 "info: Scan: Null detect: %p, %p, %p\n", 636 scan_cfg_out, chan_tlv_out, scan_chan_list); 637 return -1; 638 } 639 640 /* Check csa channel expiry before preparing scan list */ 641 mwifiex_11h_get_csa_closed_channel(priv); 642 643 chan_tlv_out->header.type = cpu_to_le16(TLV_TYPE_CHANLIST); 644 645 /* Set the temp channel struct pointer to the start of the desired 646 list */ 647 tmp_chan_list = scan_chan_list; 648 649 /* Loop through the desired channel list, sending a new firmware scan 650 commands for each max_chan_per_scan channels (or for 1,6,11 651 individually if configured accordingly) */ 652 while (tmp_chan_list->chan_number) { 653 654 tlv_idx = 0; 655 total_scan_time = 0; 656 radio_type = 0; 657 chan_tlv_out->header.len = 0; 658 start_chan = tmp_chan_list; 659 done_early = false; 660 661 /* 662 * Construct the Channel TLV for the scan command. Continue to 663 * insert channel TLVs until: 664 * - the tlv_idx hits the maximum configured per scan command 665 * - the next channel to insert is 0 (end of desired channel 666 * list) 667 * - done_early is set (controlling individual scanning of 668 * 1,6,11) 669 */ 670 while (tlv_idx < max_chan_per_scan && 671 tmp_chan_list->chan_number && !done_early) { 672 673 if (tmp_chan_list->chan_number == priv->csa_chan) { 674 tmp_chan_list++; 675 continue; 676 } 677 678 radio_type = tmp_chan_list->radio_type; 679 mwifiex_dbg(priv->adapter, INFO, 680 "info: Scan: Chan(%3d), Radio(%d),\t" 681 "Mode(%d, %d), Dur(%d)\n", 682 tmp_chan_list->chan_number, 683 tmp_chan_list->radio_type, 684 tmp_chan_list->chan_scan_mode_bitmap 685 & MWIFIEX_PASSIVE_SCAN, 686 (tmp_chan_list->chan_scan_mode_bitmap 687 & MWIFIEX_DISABLE_CHAN_FILT) >> 1, 688 le16_to_cpu(tmp_chan_list->max_scan_time)); 689 690 /* Copy the current channel TLV to the command being 691 prepared */ 692 memcpy(chan_tlv_out->chan_scan_param + tlv_idx, 693 tmp_chan_list, 694 sizeof(chan_tlv_out->chan_scan_param)); 695 696 /* Increment the TLV header length by the size 697 appended */ 698 le16_unaligned_add_cpu(&chan_tlv_out->header.len, 699 sizeof( 700 chan_tlv_out->chan_scan_param)); 701 702 /* 703 * The tlv buffer length is set to the number of bytes 704 * of the between the channel tlv pointer and the start 705 * of the tlv buffer. This compensates for any TLVs 706 * that were appended before the channel list. 707 */ 708 scan_cfg_out->tlv_buf_len = (u32) ((u8 *) chan_tlv_out - 709 scan_cfg_out->tlv_buf); 710 711 /* Add the size of the channel tlv header and the data 712 length */ 713 scan_cfg_out->tlv_buf_len += 714 (sizeof(chan_tlv_out->header) 715 + le16_to_cpu(chan_tlv_out->header.len)); 716 717 /* Increment the index to the channel tlv we are 718 constructing */ 719 tlv_idx++; 720 721 /* Count the total scan time per command */ 722 total_scan_time += 723 le16_to_cpu(tmp_chan_list->max_scan_time); 724 725 done_early = false; 726 727 /* Stop the loop if the *current* channel is in the 728 1,6,11 set and we are not filtering on a BSSID 729 or SSID. */ 730 if (!filtered_scan && 731 (tmp_chan_list->chan_number == 1 || 732 tmp_chan_list->chan_number == 6 || 733 tmp_chan_list->chan_number == 11)) 734 done_early = true; 735 736 /* Increment the tmp pointer to the next channel to 737 be scanned */ 738 tmp_chan_list++; 739 740 /* Stop the loop if the *next* channel is in the 1,6,11 741 set. This will cause it to be the only channel 742 scanned on the next interation */ 743 if (!filtered_scan && 744 (tmp_chan_list->chan_number == 1 || 745 tmp_chan_list->chan_number == 6 || 746 tmp_chan_list->chan_number == 11)) 747 done_early = true; 748 } 749 750 /* The total scan time should be less than scan command timeout 751 value */ 752 if (total_scan_time > MWIFIEX_MAX_TOTAL_SCAN_TIME) { 753 mwifiex_dbg(priv->adapter, ERROR, 754 "total scan time %dms\t" 755 "is over limit (%dms), scan skipped\n", 756 total_scan_time, 757 MWIFIEX_MAX_TOTAL_SCAN_TIME); 758 ret = -1; 759 break; 760 } 761 762 rates_size = mwifiex_append_rate_tlv(priv, scan_cfg_out, 763 radio_type); 764 765 priv->adapter->scan_channels = start_chan; 766 767 /* Send the scan command to the firmware with the specified 768 cfg */ 769 if (priv->adapter->ext_scan) 770 cmd_no = HostCmd_CMD_802_11_SCAN_EXT; 771 else 772 cmd_no = HostCmd_CMD_802_11_SCAN; 773 774 ret = mwifiex_send_cmd(priv, cmd_no, HostCmd_ACT_GEN_SET, 775 0, scan_cfg_out, false); 776 777 /* rate IE is updated per scan command but same starting 778 * pointer is used each time so that rate IE from earlier 779 * scan_cfg_out->buf is overwritten with new one. 780 */ 781 scan_cfg_out->tlv_buf_len -= 782 sizeof(struct mwifiex_ie_types_header) + rates_size; 783 784 if (ret) { 785 mwifiex_cancel_pending_scan_cmd(adapter); 786 break; 787 } 788 } 789 790 if (ret) 791 return -1; 792 793 return 0; 794} 795 796/* 797 * This function constructs a scan command configuration structure to use 798 * in scan commands. 799 * 800 * Application layer or other functions can invoke network scanning 801 * with a scan configuration supplied in a user scan configuration structure. 802 * This structure is used as the basis of one or many scan command configuration 803 * commands that are sent to the command processing module and eventually to the 804 * firmware. 805 * 806 * This function creates a scan command configuration structure based on the 807 * following user supplied parameters (if present): 808 * - SSID filter 809 * - BSSID filter 810 * - Number of Probes to be sent 811 * - Channel list 812 * 813 * If the SSID or BSSID filter is not present, the filter is disabled/cleared. 814 * If the number of probes is not set, adapter default setting is used. 815 */ 816static void 817mwifiex_config_scan(struct mwifiex_private *priv, 818 const struct mwifiex_user_scan_cfg *user_scan_in, 819 struct mwifiex_scan_cmd_config *scan_cfg_out, 820 struct mwifiex_ie_types_chan_list_param_set **chan_list_out, 821 struct mwifiex_chan_scan_param_set *scan_chan_list, 822 u8 *max_chan_per_scan, u8 *filtered_scan, 823 u8 *scan_current_only) 824{ 825 struct mwifiex_adapter *adapter = priv->adapter; 826 struct mwifiex_ie_types_num_probes *num_probes_tlv; 827 struct mwifiex_ie_types_scan_chan_gap *chan_gap_tlv; 828 struct mwifiex_ie_types_random_mac *random_mac_tlv; 829 struct mwifiex_ie_types_wildcard_ssid_params *wildcard_ssid_tlv; 830 struct mwifiex_ie_types_bssid_list *bssid_tlv; 831 u8 *tlv_pos; 832 u32 num_probes; 833 u32 ssid_len; 834 u32 chan_idx; 835 u32 scan_type; 836 u16 scan_dur; 837 u8 channel; 838 u8 radio_type; 839 int i; 840 u8 ssid_filter; 841 struct mwifiex_ie_types_htcap *ht_cap; 842 struct mwifiex_ie_types_bss_mode *bss_mode; 843 const u8 zero_mac[6] = {0, 0, 0, 0, 0, 0}; 844 845 /* The tlv_buf_len is calculated for each scan command. The TLVs added 846 in this routine will be preserved since the routine that sends the 847 command will append channelTLVs at *chan_list_out. The difference 848 between the *chan_list_out and the tlv_buf start will be used to 849 calculate the size of anything we add in this routine. */ 850 scan_cfg_out->tlv_buf_len = 0; 851 852 /* Running tlv pointer. Assigned to chan_list_out at end of function 853 so later routines know where channels can be added to the command 854 buf */ 855 tlv_pos = scan_cfg_out->tlv_buf; 856 857 /* Initialize the scan as un-filtered; the flag is later set to TRUE 858 below if a SSID or BSSID filter is sent in the command */ 859 *filtered_scan = false; 860 861 /* Initialize the scan as not being only on the current channel. If 862 the channel list is customized, only contains one channel, and is 863 the active channel, this is set true and data flow is not halted. */ 864 *scan_current_only = false; 865 866 if (user_scan_in) { 867 u8 tmpaddr[ETH_ALEN]; 868 869 /* Default the ssid_filter flag to TRUE, set false under 870 certain wildcard conditions and qualified by the existence 871 of an SSID list before marking the scan as filtered */ 872 ssid_filter = true; 873 874 /* Set the BSS type scan filter, use Adapter setting if 875 unset */ 876 scan_cfg_out->bss_mode = 877 (u8)(user_scan_in->bss_mode ?: adapter->scan_mode); 878 879 /* Set the number of probes to send, use Adapter setting 880 if unset */ 881 num_probes = user_scan_in->num_probes ?: adapter->scan_probes; 882 883 /* 884 * Set the BSSID filter to the incoming configuration, 885 * if non-zero. If not set, it will remain disabled 886 * (all zeros). 887 */ 888 memcpy(scan_cfg_out->specific_bssid, 889 user_scan_in->specific_bssid, 890 sizeof(scan_cfg_out->specific_bssid)); 891 892 memcpy(tmpaddr, scan_cfg_out->specific_bssid, ETH_ALEN); 893 894 if (adapter->ext_scan && 895 !is_zero_ether_addr(tmpaddr)) { 896 bssid_tlv = 897 (struct mwifiex_ie_types_bssid_list *)tlv_pos; 898 bssid_tlv->header.type = cpu_to_le16(TLV_TYPE_BSSID); 899 bssid_tlv->header.len = cpu_to_le16(ETH_ALEN); 900 memcpy(bssid_tlv->bssid, user_scan_in->specific_bssid, 901 ETH_ALEN); 902 tlv_pos += sizeof(struct mwifiex_ie_types_bssid_list); 903 } 904 905 for (i = 0; i < user_scan_in->num_ssids; i++) { 906 ssid_len = user_scan_in->ssid_list[i].ssid_len; 907 908 wildcard_ssid_tlv = 909 (struct mwifiex_ie_types_wildcard_ssid_params *) 910 tlv_pos; 911 wildcard_ssid_tlv->header.type = 912 cpu_to_le16(TLV_TYPE_WILDCARDSSID); 913 wildcard_ssid_tlv->header.len = cpu_to_le16( 914 (u16) (ssid_len + sizeof(wildcard_ssid_tlv-> 915 max_ssid_length))); 916 917 /* 918 * max_ssid_length = 0 tells firmware to perform 919 * specific scan for the SSID filled, whereas 920 * max_ssid_length = IEEE80211_MAX_SSID_LEN is for 921 * wildcard scan. 922 */ 923 if (ssid_len) 924 wildcard_ssid_tlv->max_ssid_length = 0; 925 else 926 wildcard_ssid_tlv->max_ssid_length = 927 IEEE80211_MAX_SSID_LEN; 928 929 if (!memcmp(user_scan_in->ssid_list[i].ssid, 930 "DIRECT-", 7)) 931 wildcard_ssid_tlv->max_ssid_length = 0xfe; 932 933 memcpy(wildcard_ssid_tlv->ssid, 934 user_scan_in->ssid_list[i].ssid, ssid_len); 935 936 tlv_pos += (sizeof(wildcard_ssid_tlv->header) 937 + le16_to_cpu(wildcard_ssid_tlv->header.len)); 938 939 mwifiex_dbg(adapter, INFO, 940 "info: scan: ssid[%d]: %s, %d\n", 941 i, wildcard_ssid_tlv->ssid, 942 wildcard_ssid_tlv->max_ssid_length); 943 944 /* Empty wildcard ssid with a maxlen will match many or 945 potentially all SSIDs (maxlen == 32), therefore do 946 not treat the scan as 947 filtered. */ 948 if (!ssid_len && wildcard_ssid_tlv->max_ssid_length) 949 ssid_filter = false; 950 } 951 952 /* 953 * The default number of channels sent in the command is low to 954 * ensure the response buffer from the firmware does not 955 * truncate scan results. That is not an issue with an SSID 956 * or BSSID filter applied to the scan results in the firmware. 957 */ 958 memcpy(tmpaddr, scan_cfg_out->specific_bssid, ETH_ALEN); 959 if ((i && ssid_filter) || 960 !is_zero_ether_addr(tmpaddr)) 961 *filtered_scan = true; 962 963 if (user_scan_in->scan_chan_gap) { 964 mwifiex_dbg(adapter, INFO, 965 "info: scan: channel gap = %d\n", 966 user_scan_in->scan_chan_gap); 967 *max_chan_per_scan = 968 MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN; 969 970 chan_gap_tlv = (void *)tlv_pos; 971 chan_gap_tlv->header.type = 972 cpu_to_le16(TLV_TYPE_SCAN_CHANNEL_GAP); 973 chan_gap_tlv->header.len = 974 cpu_to_le16(sizeof(chan_gap_tlv->chan_gap)); 975 chan_gap_tlv->chan_gap = 976 cpu_to_le16((user_scan_in->scan_chan_gap)); 977 tlv_pos += 978 sizeof(struct mwifiex_ie_types_scan_chan_gap); 979 } 980 981 if (!ether_addr_equal(user_scan_in->random_mac, zero_mac)) { 982 random_mac_tlv = (void *)tlv_pos; 983 random_mac_tlv->header.type = 984 cpu_to_le16(TLV_TYPE_RANDOM_MAC); 985 random_mac_tlv->header.len = 986 cpu_to_le16(sizeof(random_mac_tlv->mac)); 987 ether_addr_copy(random_mac_tlv->mac, 988 user_scan_in->random_mac); 989 tlv_pos += 990 sizeof(struct mwifiex_ie_types_random_mac); 991 } 992 } else { 993 scan_cfg_out->bss_mode = (u8) adapter->scan_mode; 994 num_probes = adapter->scan_probes; 995 } 996 997 /* 998 * If a specific BSSID or SSID is used, the number of channels in the 999 * scan command will be increased to the absolute maximum. 1000 */ 1001 if (*filtered_scan) { 1002 *max_chan_per_scan = MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN; 1003 } else { 1004 if (!priv->media_connected) 1005 *max_chan_per_scan = MWIFIEX_DEF_CHANNELS_PER_SCAN_CMD; 1006 else 1007 *max_chan_per_scan = 1008 MWIFIEX_DEF_CHANNELS_PER_SCAN_CMD / 2; 1009 } 1010 1011 if (adapter->ext_scan) { 1012 bss_mode = (struct mwifiex_ie_types_bss_mode *)tlv_pos; 1013 bss_mode->header.type = cpu_to_le16(TLV_TYPE_BSS_MODE); 1014 bss_mode->header.len = cpu_to_le16(sizeof(bss_mode->bss_mode)); 1015 bss_mode->bss_mode = scan_cfg_out->bss_mode; 1016 tlv_pos += sizeof(bss_mode->header) + 1017 le16_to_cpu(bss_mode->header.len); 1018 } 1019 1020 /* If the input config or adapter has the number of Probes set, 1021 add tlv */ 1022 if (num_probes) { 1023 1024 mwifiex_dbg(adapter, INFO, 1025 "info: scan: num_probes = %d\n", 1026 num_probes); 1027 1028 num_probes_tlv = (struct mwifiex_ie_types_num_probes *) tlv_pos; 1029 num_probes_tlv->header.type = cpu_to_le16(TLV_TYPE_NUMPROBES); 1030 num_probes_tlv->header.len = 1031 cpu_to_le16(sizeof(num_probes_tlv->num_probes)); 1032 num_probes_tlv->num_probes = cpu_to_le16((u16) num_probes); 1033 1034 tlv_pos += sizeof(num_probes_tlv->header) + 1035 le16_to_cpu(num_probes_tlv->header.len); 1036 1037 } 1038 1039 if (ISSUPP_11NENABLED(priv->adapter->fw_cap_info) && 1040 (priv->adapter->config_bands & BAND_GN || 1041 priv->adapter->config_bands & BAND_AN)) { 1042 ht_cap = (struct mwifiex_ie_types_htcap *) tlv_pos; 1043 memset(ht_cap, 0, sizeof(struct mwifiex_ie_types_htcap)); 1044 ht_cap->header.type = cpu_to_le16(WLAN_EID_HT_CAPABILITY); 1045 ht_cap->header.len = 1046 cpu_to_le16(sizeof(struct ieee80211_ht_cap)); 1047 radio_type = 1048 mwifiex_band_to_radio_type(priv->adapter->config_bands); 1049 mwifiex_fill_cap_info(priv, radio_type, &ht_cap->ht_cap); 1050 tlv_pos += sizeof(struct mwifiex_ie_types_htcap); 1051 } 1052 1053 /* Append vendor specific IE TLV */ 1054 mwifiex_cmd_append_vsie_tlv(priv, MWIFIEX_VSIE_MASK_SCAN, &tlv_pos); 1055 1056 /* 1057 * Set the output for the channel TLV to the address in the tlv buffer 1058 * past any TLVs that were added in this function (SSID, num_probes). 1059 * Channel TLVs will be added past this for each scan command, 1060 * preserving the TLVs that were previously added. 1061 */ 1062 *chan_list_out = 1063 (struct mwifiex_ie_types_chan_list_param_set *) tlv_pos; 1064 1065 if (user_scan_in && user_scan_in->chan_list[0].chan_number) { 1066 1067 mwifiex_dbg(adapter, INFO, 1068 "info: Scan: Using supplied channel list\n"); 1069 1070 for (chan_idx = 0; 1071 chan_idx < MWIFIEX_USER_SCAN_CHAN_MAX && 1072 user_scan_in->chan_list[chan_idx].chan_number; 1073 chan_idx++) { 1074 1075 channel = user_scan_in->chan_list[chan_idx].chan_number; 1076 scan_chan_list[chan_idx].chan_number = channel; 1077 1078 radio_type = 1079 user_scan_in->chan_list[chan_idx].radio_type; 1080 scan_chan_list[chan_idx].radio_type = radio_type; 1081 1082 scan_type = user_scan_in->chan_list[chan_idx].scan_type; 1083 1084 if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE) 1085 scan_chan_list[chan_idx].chan_scan_mode_bitmap 1086 |= (MWIFIEX_PASSIVE_SCAN | 1087 MWIFIEX_HIDDEN_SSID_REPORT); 1088 else 1089 scan_chan_list[chan_idx].chan_scan_mode_bitmap 1090 &= ~MWIFIEX_PASSIVE_SCAN; 1091 1092 scan_chan_list[chan_idx].chan_scan_mode_bitmap 1093 |= MWIFIEX_DISABLE_CHAN_FILT; 1094 1095 if (user_scan_in->chan_list[chan_idx].scan_time) { 1096 scan_dur = (u16) user_scan_in-> 1097 chan_list[chan_idx].scan_time; 1098 } else { 1099 if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE) 1100 scan_dur = adapter->passive_scan_time; 1101 else if (*filtered_scan) 1102 scan_dur = adapter->specific_scan_time; 1103 else 1104 scan_dur = adapter->active_scan_time; 1105 } 1106 1107 scan_chan_list[chan_idx].min_scan_time = 1108 cpu_to_le16(scan_dur); 1109 scan_chan_list[chan_idx].max_scan_time = 1110 cpu_to_le16(scan_dur); 1111 } 1112 1113 /* Check if we are only scanning the current channel */ 1114 if ((chan_idx == 1) && 1115 (user_scan_in->chan_list[0].chan_number == 1116 priv->curr_bss_params.bss_descriptor.channel)) { 1117 *scan_current_only = true; 1118 mwifiex_dbg(adapter, INFO, 1119 "info: Scan: Scanning current channel only\n"); 1120 } 1121 } else { 1122 mwifiex_dbg(adapter, INFO, 1123 "info: Scan: Creating full region channel list\n"); 1124 mwifiex_scan_create_channel_list(priv, user_scan_in, 1125 scan_chan_list, 1126 *filtered_scan); 1127 } 1128 1129} 1130 1131/* 1132 * This function inspects the scan response buffer for pointers to 1133 * expected TLVs. 1134 * 1135 * TLVs can be included at the end of the scan response BSS information. 1136 * 1137 * Data in the buffer is parsed pointers to TLVs that can potentially 1138 * be passed back in the response. 1139 */ 1140static void 1141mwifiex_ret_802_11_scan_get_tlv_ptrs(struct mwifiex_adapter *adapter, 1142 struct mwifiex_ie_types_data *tlv, 1143 u32 tlv_buf_size, u32 req_tlv_type, 1144 struct mwifiex_ie_types_data **tlv_data) 1145{ 1146 struct mwifiex_ie_types_data *current_tlv; 1147 u32 tlv_buf_left; 1148 u32 tlv_type; 1149 u32 tlv_len; 1150 1151 current_tlv = tlv; 1152 tlv_buf_left = tlv_buf_size; 1153 *tlv_data = NULL; 1154 1155 mwifiex_dbg(adapter, INFO, 1156 "info: SCAN_RESP: tlv_buf_size = %d\n", 1157 tlv_buf_size); 1158 1159 while (tlv_buf_left >= sizeof(struct mwifiex_ie_types_header)) { 1160 1161 tlv_type = le16_to_cpu(current_tlv->header.type); 1162 tlv_len = le16_to_cpu(current_tlv->header.len); 1163 1164 if (sizeof(tlv->header) + tlv_len > tlv_buf_left) { 1165 mwifiex_dbg(adapter, ERROR, 1166 "SCAN_RESP: TLV buffer corrupt\n"); 1167 break; 1168 } 1169 1170 if (req_tlv_type == tlv_type) { 1171 switch (tlv_type) { 1172 case TLV_TYPE_TSFTIMESTAMP: 1173 mwifiex_dbg(adapter, INFO, 1174 "info: SCAN_RESP: TSF\t" 1175 "timestamp TLV, len = %d\n", 1176 tlv_len); 1177 *tlv_data = current_tlv; 1178 break; 1179 case TLV_TYPE_CHANNELBANDLIST: 1180 mwifiex_dbg(adapter, INFO, 1181 "info: SCAN_RESP: channel\t" 1182 "band list TLV, len = %d\n", 1183 tlv_len); 1184 *tlv_data = current_tlv; 1185 break; 1186 default: 1187 mwifiex_dbg(adapter, ERROR, 1188 "SCAN_RESP: unhandled TLV = %d\n", 1189 tlv_type); 1190 /* Give up, this seems corrupted */ 1191 return; 1192 } 1193 } 1194 1195 if (*tlv_data) 1196 break; 1197 1198 1199 tlv_buf_left -= (sizeof(tlv->header) + tlv_len); 1200 current_tlv = 1201 (struct mwifiex_ie_types_data *) (current_tlv->data + 1202 tlv_len); 1203 1204 } /* while */ 1205} 1206 1207/* 1208 * This function parses provided beacon buffer and updates 1209 * respective fields in bss descriptor structure. 1210 */ 1211int mwifiex_update_bss_desc_with_ie(struct mwifiex_adapter *adapter, 1212 struct mwifiex_bssdescriptor *bss_entry) 1213{ 1214 int ret = 0; 1215 u8 element_id; 1216 struct ieee_types_fh_param_set *fh_param_set; 1217 struct ieee_types_ds_param_set *ds_param_set; 1218 struct ieee_types_cf_param_set *cf_param_set; 1219 struct ieee_types_ibss_param_set *ibss_param_set; 1220 u8 *current_ptr; 1221 u8 *rate; 1222 u8 element_len; 1223 u16 total_ie_len; 1224 u8 bytes_to_copy; 1225 u8 rate_size; 1226 u8 found_data_rate_ie; 1227 u32 bytes_left; 1228 struct ieee_types_vendor_specific *vendor_ie; 1229 const u8 wpa_oui[4] = { 0x00, 0x50, 0xf2, 0x01 }; 1230 const u8 wmm_oui[4] = { 0x00, 0x50, 0xf2, 0x02 }; 1231 1232 found_data_rate_ie = false; 1233 rate_size = 0; 1234 current_ptr = bss_entry->beacon_buf; 1235 bytes_left = bss_entry->beacon_buf_size; 1236 1237 /* Process variable IE */ 1238 while (bytes_left >= 2) { 1239 element_id = *current_ptr; 1240 element_len = *(current_ptr + 1); 1241 total_ie_len = element_len + sizeof(struct ieee_types_header); 1242 1243 if (bytes_left < total_ie_len) { 1244 mwifiex_dbg(adapter, ERROR, 1245 "err: InterpretIE: in processing\t" 1246 "IE, bytes left < IE length\n"); 1247 return -EINVAL; 1248 } 1249 switch (element_id) { 1250 case WLAN_EID_SSID: 1251 if (element_len > IEEE80211_MAX_SSID_LEN) 1252 return -EINVAL; 1253 bss_entry->ssid.ssid_len = element_len; 1254 memcpy(bss_entry->ssid.ssid, (current_ptr + 2), 1255 element_len); 1256 mwifiex_dbg(adapter, INFO, 1257 "info: InterpretIE: ssid: %-32s\n", 1258 bss_entry->ssid.ssid); 1259 break; 1260 1261 case WLAN_EID_SUPP_RATES: 1262 if (element_len > MWIFIEX_SUPPORTED_RATES) 1263 return -EINVAL; 1264 memcpy(bss_entry->data_rates, current_ptr + 2, 1265 element_len); 1266 memcpy(bss_entry->supported_rates, current_ptr + 2, 1267 element_len); 1268 rate_size = element_len; 1269 found_data_rate_ie = true; 1270 break; 1271 1272 case WLAN_EID_FH_PARAMS: 1273 if (total_ie_len < sizeof(*fh_param_set)) 1274 return -EINVAL; 1275 fh_param_set = 1276 (struct ieee_types_fh_param_set *) current_ptr; 1277 memcpy(&bss_entry->phy_param_set.fh_param_set, 1278 fh_param_set, 1279 sizeof(struct ieee_types_fh_param_set)); 1280 break; 1281 1282 case WLAN_EID_DS_PARAMS: 1283 if (total_ie_len < sizeof(*ds_param_set)) 1284 return -EINVAL; 1285 ds_param_set = 1286 (struct ieee_types_ds_param_set *) current_ptr; 1287 1288 bss_entry->channel = ds_param_set->current_chan; 1289 1290 memcpy(&bss_entry->phy_param_set.ds_param_set, 1291 ds_param_set, 1292 sizeof(struct ieee_types_ds_param_set)); 1293 break; 1294 1295 case WLAN_EID_CF_PARAMS: 1296 if (total_ie_len < sizeof(*cf_param_set)) 1297 return -EINVAL; 1298 cf_param_set = 1299 (struct ieee_types_cf_param_set *) current_ptr; 1300 memcpy(&bss_entry->ss_param_set.cf_param_set, 1301 cf_param_set, 1302 sizeof(struct ieee_types_cf_param_set)); 1303 break; 1304 1305 case WLAN_EID_IBSS_PARAMS: 1306 if (total_ie_len < sizeof(*ibss_param_set)) 1307 return -EINVAL; 1308 ibss_param_set = 1309 (struct ieee_types_ibss_param_set *) 1310 current_ptr; 1311 memcpy(&bss_entry->ss_param_set.ibss_param_set, 1312 ibss_param_set, 1313 sizeof(struct ieee_types_ibss_param_set)); 1314 break; 1315 1316 case WLAN_EID_ERP_INFO: 1317 if (!element_len) 1318 return -EINVAL; 1319 bss_entry->erp_flags = *(current_ptr + 2); 1320 break; 1321 1322 case WLAN_EID_PWR_CONSTRAINT: 1323 if (!element_len) 1324 return -EINVAL; 1325 bss_entry->local_constraint = *(current_ptr + 2); 1326 bss_entry->sensed_11h = true; 1327 break; 1328 1329 case WLAN_EID_CHANNEL_SWITCH: 1330 bss_entry->chan_sw_ie_present = true; 1331 fallthrough; 1332 case WLAN_EID_PWR_CAPABILITY: 1333 case WLAN_EID_TPC_REPORT: 1334 case WLAN_EID_QUIET: 1335 bss_entry->sensed_11h = true; 1336 break; 1337 1338 case WLAN_EID_EXT_SUPP_RATES: 1339 /* 1340 * Only process extended supported rate 1341 * if data rate is already found. 1342 * Data rate IE should come before 1343 * extended supported rate IE 1344 */ 1345 if (found_data_rate_ie) { 1346 if ((element_len + rate_size) > 1347 MWIFIEX_SUPPORTED_RATES) 1348 bytes_to_copy = 1349 (MWIFIEX_SUPPORTED_RATES - 1350 rate_size); 1351 else 1352 bytes_to_copy = element_len; 1353 1354 rate = (u8 *) bss_entry->data_rates; 1355 rate += rate_size; 1356 memcpy(rate, current_ptr + 2, bytes_to_copy); 1357 1358 rate = (u8 *) bss_entry->supported_rates; 1359 rate += rate_size; 1360 memcpy(rate, current_ptr + 2, bytes_to_copy); 1361 } 1362 break; 1363 1364 case WLAN_EID_VENDOR_SPECIFIC: 1365 vendor_ie = (struct ieee_types_vendor_specific *) 1366 current_ptr; 1367 1368 /* 802.11 requires at least 3-byte OUI. */ 1369 if (element_len < sizeof(vendor_ie->vend_hdr.oui.oui)) 1370 return -EINVAL; 1371 1372 /* Not long enough for a match? Skip it. */ 1373 if (element_len < sizeof(wpa_oui)) 1374 break; 1375 1376 if (!memcmp(&vendor_ie->vend_hdr.oui, wpa_oui, 1377 sizeof(wpa_oui))) { 1378 bss_entry->bcn_wpa_ie = 1379 (struct ieee_types_vendor_specific *) 1380 current_ptr; 1381 bss_entry->wpa_offset = (u16) 1382 (current_ptr - bss_entry->beacon_buf); 1383 } else if (!memcmp(&vendor_ie->vend_hdr.oui, wmm_oui, 1384 sizeof(wmm_oui))) { 1385 if (total_ie_len == 1386 sizeof(struct ieee_types_wmm_parameter) || 1387 total_ie_len == 1388 sizeof(struct ieee_types_wmm_info)) 1389 /* 1390 * Only accept and copy the WMM IE if 1391 * it matches the size expected for the 1392 * WMM Info IE or the WMM Parameter IE. 1393 */ 1394 memcpy((u8 *) &bss_entry->wmm_ie, 1395 current_ptr, total_ie_len); 1396 } 1397 break; 1398 case WLAN_EID_RSN: 1399 bss_entry->bcn_rsn_ie = 1400 (struct ieee_types_generic *) current_ptr; 1401 bss_entry->rsn_offset = (u16) (current_ptr - 1402 bss_entry->beacon_buf); 1403 break; 1404 case WLAN_EID_BSS_AC_ACCESS_DELAY: 1405 bss_entry->bcn_wapi_ie = 1406 (struct ieee_types_generic *) current_ptr; 1407 bss_entry->wapi_offset = (u16) (current_ptr - 1408 bss_entry->beacon_buf); 1409 break; 1410 case WLAN_EID_HT_CAPABILITY: 1411 bss_entry->bcn_ht_cap = (struct ieee80211_ht_cap *) 1412 (current_ptr + 1413 sizeof(struct ieee_types_header)); 1414 bss_entry->ht_cap_offset = (u16) (current_ptr + 1415 sizeof(struct ieee_types_header) - 1416 bss_entry->beacon_buf); 1417 break; 1418 case WLAN_EID_HT_OPERATION: 1419 bss_entry->bcn_ht_oper = 1420 (struct ieee80211_ht_operation *)(current_ptr + 1421 sizeof(struct ieee_types_header)); 1422 bss_entry->ht_info_offset = (u16) (current_ptr + 1423 sizeof(struct ieee_types_header) - 1424 bss_entry->beacon_buf); 1425 break; 1426 case WLAN_EID_VHT_CAPABILITY: 1427 bss_entry->disable_11ac = false; 1428 bss_entry->bcn_vht_cap = 1429 (void *)(current_ptr + 1430 sizeof(struct ieee_types_header)); 1431 bss_entry->vht_cap_offset = 1432 (u16)((u8 *)bss_entry->bcn_vht_cap - 1433 bss_entry->beacon_buf); 1434 break; 1435 case WLAN_EID_VHT_OPERATION: 1436 bss_entry->bcn_vht_oper = 1437 (void *)(current_ptr + 1438 sizeof(struct ieee_types_header)); 1439 bss_entry->vht_info_offset = 1440 (u16)((u8 *)bss_entry->bcn_vht_oper - 1441 bss_entry->beacon_buf); 1442 break; 1443 case WLAN_EID_BSS_COEX_2040: 1444 bss_entry->bcn_bss_co_2040 = current_ptr; 1445 bss_entry->bss_co_2040_offset = 1446 (u16) (current_ptr - bss_entry->beacon_buf); 1447 break; 1448 case WLAN_EID_EXT_CAPABILITY: 1449 bss_entry->bcn_ext_cap = current_ptr; 1450 bss_entry->ext_cap_offset = 1451 (u16) (current_ptr - bss_entry->beacon_buf); 1452 break; 1453 case WLAN_EID_OPMODE_NOTIF: 1454 bss_entry->oper_mode = (void *)current_ptr; 1455 bss_entry->oper_mode_offset = 1456 (u16)((u8 *)bss_entry->oper_mode - 1457 bss_entry->beacon_buf); 1458 break; 1459 default: 1460 break; 1461 } 1462 1463 current_ptr += total_ie_len; 1464 bytes_left -= total_ie_len; 1465 1466 } /* while (bytes_left > 2) */ 1467 return ret; 1468} 1469 1470/* 1471 * This function converts radio type scan parameter to a band configuration 1472 * to be used in join command. 1473 */ 1474static u8 1475mwifiex_radio_type_to_band(u8 radio_type) 1476{ 1477 switch (radio_type) { 1478 case HostCmd_SCAN_RADIO_TYPE_A: 1479 return BAND_A; 1480 case HostCmd_SCAN_RADIO_TYPE_BG: 1481 default: 1482 return BAND_G; 1483 } 1484} 1485 1486/* 1487 * This is an internal function used to start a scan based on an input 1488 * configuration. 1489 * 1490 * This uses the input user scan configuration information when provided in 1491 * order to send the appropriate scan commands to firmware to populate or 1492 * update the internal driver scan table. 1493 */ 1494int mwifiex_scan_networks(struct mwifiex_private *priv, 1495 const struct mwifiex_user_scan_cfg *user_scan_in) 1496{ 1497 int ret; 1498 struct mwifiex_adapter *adapter = priv->adapter; 1499 struct cmd_ctrl_node *cmd_node; 1500 union mwifiex_scan_cmd_config_tlv *scan_cfg_out; 1501 struct mwifiex_ie_types_chan_list_param_set *chan_list_out; 1502 struct mwifiex_chan_scan_param_set *scan_chan_list; 1503 u8 filtered_scan; 1504 u8 scan_current_chan_only; 1505 u8 max_chan_per_scan; 1506 1507 if (adapter->scan_processing) { 1508 mwifiex_dbg(adapter, WARN, 1509 "cmd: Scan already in process...\n"); 1510 return -EBUSY; 1511 } 1512 1513 if (priv->scan_block) { 1514 mwifiex_dbg(adapter, WARN, 1515 "cmd: Scan is blocked during association...\n"); 1516 return -EBUSY; 1517 } 1518 1519 if (test_bit(MWIFIEX_SURPRISE_REMOVED, &adapter->work_flags) || 1520 test_bit(MWIFIEX_IS_CMD_TIMEDOUT, &adapter->work_flags)) { 1521 mwifiex_dbg(adapter, ERROR, 1522 "Ignore scan. Card removed or firmware in bad state\n"); 1523 return -EFAULT; 1524 } 1525 1526 spin_lock_bh(&adapter->mwifiex_cmd_lock); 1527 adapter->scan_processing = true; 1528 spin_unlock_bh(&adapter->mwifiex_cmd_lock); 1529 1530 scan_cfg_out = kzalloc(sizeof(union mwifiex_scan_cmd_config_tlv), 1531 GFP_KERNEL); 1532 if (!scan_cfg_out) { 1533 ret = -ENOMEM; 1534 goto done; 1535 } 1536 1537 scan_chan_list = kcalloc(MWIFIEX_USER_SCAN_CHAN_MAX, 1538 sizeof(struct mwifiex_chan_scan_param_set), 1539 GFP_KERNEL); 1540 if (!scan_chan_list) { 1541 kfree(scan_cfg_out); 1542 ret = -ENOMEM; 1543 goto done; 1544 } 1545 1546 mwifiex_config_scan(priv, user_scan_in, &scan_cfg_out->config, 1547 &chan_list_out, scan_chan_list, &max_chan_per_scan, 1548 &filtered_scan, &scan_current_chan_only); 1549 1550 ret = mwifiex_scan_channel_list(priv, max_chan_per_scan, filtered_scan, 1551 &scan_cfg_out->config, chan_list_out, 1552 scan_chan_list); 1553 1554 /* Get scan command from scan_pending_q and put to cmd_pending_q */ 1555 if (!ret) { 1556 spin_lock_bh(&adapter->scan_pending_q_lock); 1557 if (!list_empty(&adapter->scan_pending_q)) { 1558 cmd_node = list_first_entry(&adapter->scan_pending_q, 1559 struct cmd_ctrl_node, list); 1560 list_del(&cmd_node->list); 1561 spin_unlock_bh(&adapter->scan_pending_q_lock); 1562 mwifiex_insert_cmd_to_pending_q(adapter, cmd_node); 1563 queue_work(adapter->workqueue, &adapter->main_work); 1564 1565 /* Perform internal scan synchronously */ 1566 if (!priv->scan_request) { 1567 mwifiex_dbg(adapter, INFO, 1568 "wait internal scan\n"); 1569 mwifiex_wait_queue_complete(adapter, cmd_node); 1570 } 1571 } else { 1572 spin_unlock_bh(&adapter->scan_pending_q_lock); 1573 } 1574 } 1575 1576 kfree(scan_cfg_out); 1577 kfree(scan_chan_list); 1578done: 1579 if (ret) { 1580 spin_lock_bh(&adapter->mwifiex_cmd_lock); 1581 adapter->scan_processing = false; 1582 spin_unlock_bh(&adapter->mwifiex_cmd_lock); 1583 } 1584 return ret; 1585} 1586 1587/* 1588 * This function prepares a scan command to be sent to the firmware. 1589 * 1590 * This uses the scan command configuration sent to the command processing 1591 * module in command preparation stage to configure a scan command structure 1592 * to send to firmware. 1593 * 1594 * The fixed fields specifying the BSS type and BSSID filters as well as a 1595 * variable number/length of TLVs are sent in the command to firmware. 1596 * 1597 * Preparation also includes - 1598 * - Setting command ID, and proper size 1599 * - Ensuring correct endian-ness 1600 */ 1601int mwifiex_cmd_802_11_scan(struct host_cmd_ds_command *cmd, 1602 struct mwifiex_scan_cmd_config *scan_cfg) 1603{ 1604 struct host_cmd_ds_802_11_scan *scan_cmd = &cmd->params.scan; 1605 1606 /* Set fixed field variables in scan command */ 1607 scan_cmd->bss_mode = scan_cfg->bss_mode; 1608 memcpy(scan_cmd->bssid, scan_cfg->specific_bssid, 1609 sizeof(scan_cmd->bssid)); 1610 memcpy(scan_cmd->tlv_buffer, scan_cfg->tlv_buf, scan_cfg->tlv_buf_len); 1611 1612 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_SCAN); 1613 1614 /* Size is equal to the sizeof(fixed portions) + the TLV len + header */ 1615 cmd->size = cpu_to_le16((u16) (sizeof(scan_cmd->bss_mode) 1616 + sizeof(scan_cmd->bssid) 1617 + scan_cfg->tlv_buf_len + S_DS_GEN)); 1618 1619 return 0; 1620} 1621 1622/* 1623 * This function checks compatibility of requested network with current 1624 * driver settings. 1625 */ 1626int mwifiex_check_network_compatibility(struct mwifiex_private *priv, 1627 struct mwifiex_bssdescriptor *bss_desc) 1628{ 1629 int ret = -1; 1630 1631 if (!bss_desc) 1632 return -1; 1633 1634 if ((mwifiex_get_cfp(priv, (u8) bss_desc->bss_band, 1635 (u16) bss_desc->channel, 0))) { 1636 switch (priv->bss_mode) { 1637 case NL80211_IFTYPE_STATION: 1638 case NL80211_IFTYPE_ADHOC: 1639 ret = mwifiex_is_network_compatible(priv, bss_desc, 1640 priv->bss_mode); 1641 if (ret) 1642 mwifiex_dbg(priv->adapter, ERROR, 1643 "Incompatible network settings\n"); 1644 break; 1645 default: 1646 ret = 0; 1647 } 1648 } 1649 1650 return ret; 1651} 1652 1653/* This function checks if SSID string contains all zeroes or length is zero */ 1654static bool mwifiex_is_hidden_ssid(struct cfg80211_ssid *ssid) 1655{ 1656 int idx; 1657 1658 for (idx = 0; idx < ssid->ssid_len; idx++) { 1659 if (ssid->ssid[idx]) 1660 return false; 1661 } 1662 1663 return true; 1664} 1665 1666/* This function checks if any hidden SSID found in passive scan channels 1667 * and save those channels for specific SSID active scan 1668 */ 1669static int mwifiex_save_hidden_ssid_channels(struct mwifiex_private *priv, 1670 struct cfg80211_bss *bss) 1671{ 1672 struct mwifiex_bssdescriptor *bss_desc; 1673 int ret; 1674 int chid; 1675 1676 /* Allocate and fill new bss descriptor */ 1677 bss_desc = kzalloc(sizeof(*bss_desc), GFP_KERNEL); 1678 if (!bss_desc) 1679 return -ENOMEM; 1680 1681 ret = mwifiex_fill_new_bss_desc(priv, bss, bss_desc); 1682 if (ret) 1683 goto done; 1684 1685 if (mwifiex_is_hidden_ssid(&bss_desc->ssid)) { 1686 mwifiex_dbg(priv->adapter, INFO, "found hidden SSID\n"); 1687 for (chid = 0 ; chid < MWIFIEX_USER_SCAN_CHAN_MAX; chid++) { 1688 if (priv->hidden_chan[chid].chan_number == 1689 bss->channel->hw_value) 1690 break; 1691 1692 if (!priv->hidden_chan[chid].chan_number) { 1693 priv->hidden_chan[chid].chan_number = 1694 bss->channel->hw_value; 1695 priv->hidden_chan[chid].radio_type = 1696 bss->channel->band; 1697 priv->hidden_chan[chid].scan_type = 1698 MWIFIEX_SCAN_TYPE_ACTIVE; 1699 break; 1700 } 1701 } 1702 } 1703 1704done: 1705 /* beacon_ie buffer was allocated in function 1706 * mwifiex_fill_new_bss_desc(). Free it now. 1707 */ 1708 kfree(bss_desc->beacon_buf); 1709 kfree(bss_desc); 1710 return 0; 1711} 1712 1713static int mwifiex_update_curr_bss_params(struct mwifiex_private *priv, 1714 struct cfg80211_bss *bss) 1715{ 1716 struct mwifiex_bssdescriptor *bss_desc; 1717 int ret; 1718 1719 /* Allocate and fill new bss descriptor */ 1720 bss_desc = kzalloc(sizeof(struct mwifiex_bssdescriptor), GFP_KERNEL); 1721 if (!bss_desc) 1722 return -ENOMEM; 1723 1724 ret = mwifiex_fill_new_bss_desc(priv, bss, bss_desc); 1725 if (ret) 1726 goto done; 1727 1728 ret = mwifiex_check_network_compatibility(priv, bss_desc); 1729 if (ret) 1730 goto done; 1731 1732 spin_lock_bh(&priv->curr_bcn_buf_lock); 1733 /* Make a copy of current BSSID descriptor */ 1734 memcpy(&priv->curr_bss_params.bss_descriptor, bss_desc, 1735 sizeof(priv->curr_bss_params.bss_descriptor)); 1736 1737 /* The contents of beacon_ie will be copied to its own buffer 1738 * in mwifiex_save_curr_bcn() 1739 */ 1740 mwifiex_save_curr_bcn(priv); 1741 spin_unlock_bh(&priv->curr_bcn_buf_lock); 1742 1743done: 1744 /* beacon_ie buffer was allocated in function 1745 * mwifiex_fill_new_bss_desc(). Free it now. 1746 */ 1747 kfree(bss_desc->beacon_buf); 1748 kfree(bss_desc); 1749 return 0; 1750} 1751 1752static int 1753mwifiex_parse_single_response_buf(struct mwifiex_private *priv, u8 **bss_info, 1754 u32 *bytes_left, u64 fw_tsf, u8 *radio_type, 1755 bool ext_scan, s32 rssi_val) 1756{ 1757 struct mwifiex_adapter *adapter = priv->adapter; 1758 struct mwifiex_chan_freq_power *cfp; 1759 struct cfg80211_bss *bss; 1760 u8 bssid[ETH_ALEN]; 1761 s32 rssi; 1762 const u8 *ie_buf; 1763 size_t ie_len; 1764 u16 channel = 0; 1765 u16 beacon_size = 0; 1766 u32 curr_bcn_bytes; 1767 u32 freq; 1768 u16 beacon_period; 1769 u16 cap_info_bitmap; 1770 u8 *current_ptr; 1771 u64 timestamp; 1772 struct mwifiex_fixed_bcn_param *bcn_param; 1773 struct mwifiex_bss_priv *bss_priv; 1774 1775 if (*bytes_left >= sizeof(beacon_size)) { 1776 /* Extract & convert beacon size from command buffer */ 1777 beacon_size = get_unaligned_le16((*bss_info)); 1778 *bytes_left -= sizeof(beacon_size); 1779 *bss_info += sizeof(beacon_size); 1780 } 1781 1782 if (!beacon_size || beacon_size > *bytes_left) { 1783 *bss_info += *bytes_left; 1784 *bytes_left = 0; 1785 return -EFAULT; 1786 } 1787 1788 /* Initialize the current working beacon pointer for this BSS 1789 * iteration 1790 */ 1791 current_ptr = *bss_info; 1792 1793 /* Advance the return beacon pointer past the current beacon */ 1794 *bss_info += beacon_size; 1795 *bytes_left -= beacon_size; 1796 1797 curr_bcn_bytes = beacon_size; 1798 1799 /* First 5 fields are bssid, RSSI(for legacy scan only), 1800 * time stamp, beacon interval, and capability information 1801 */ 1802 if (curr_bcn_bytes < ETH_ALEN + sizeof(u8) + 1803 sizeof(struct mwifiex_fixed_bcn_param)) { 1804 mwifiex_dbg(adapter, ERROR, 1805 "InterpretIE: not enough bytes left\n"); 1806 return -EFAULT; 1807 } 1808 1809 memcpy(bssid, current_ptr, ETH_ALEN); 1810 current_ptr += ETH_ALEN; 1811 curr_bcn_bytes -= ETH_ALEN; 1812 1813 if (!ext_scan) { 1814 rssi = (s32) *current_ptr; 1815 rssi = (-rssi) * 100; /* Convert dBm to mBm */ 1816 current_ptr += sizeof(u8); 1817 curr_bcn_bytes -= sizeof(u8); 1818 mwifiex_dbg(adapter, INFO, 1819 "info: InterpretIE: RSSI=%d\n", rssi); 1820 } else { 1821 rssi = rssi_val; 1822 } 1823 1824 bcn_param = (struct mwifiex_fixed_bcn_param *)current_ptr; 1825 current_ptr += sizeof(*bcn_param); 1826 curr_bcn_bytes -= sizeof(*bcn_param); 1827 1828 timestamp = le64_to_cpu(bcn_param->timestamp); 1829 beacon_period = le16_to_cpu(bcn_param->beacon_period); 1830 1831 cap_info_bitmap = le16_to_cpu(bcn_param->cap_info_bitmap); 1832 mwifiex_dbg(adapter, INFO, 1833 "info: InterpretIE: capabilities=0x%X\n", 1834 cap_info_bitmap); 1835 1836 /* Rest of the current buffer are IE's */ 1837 ie_buf = current_ptr; 1838 ie_len = curr_bcn_bytes; 1839 mwifiex_dbg(adapter, INFO, 1840 "info: InterpretIE: IELength for this AP = %d\n", 1841 curr_bcn_bytes); 1842 1843 while (curr_bcn_bytes >= sizeof(struct ieee_types_header)) { 1844 u8 element_id, element_len; 1845 1846 element_id = *current_ptr; 1847 element_len = *(current_ptr + 1); 1848 if (curr_bcn_bytes < element_len + 1849 sizeof(struct ieee_types_header)) { 1850 mwifiex_dbg(adapter, ERROR, 1851 "%s: bytes left < IE length\n", __func__); 1852 return -EFAULT; 1853 } 1854 if (element_id == WLAN_EID_DS_PARAMS) { 1855 channel = *(current_ptr + 1856 sizeof(struct ieee_types_header)); 1857 break; 1858 } 1859 1860 current_ptr += element_len + sizeof(struct ieee_types_header); 1861 curr_bcn_bytes -= element_len + 1862 sizeof(struct ieee_types_header); 1863 } 1864 1865 if (channel) { 1866 struct ieee80211_channel *chan; 1867 u8 band; 1868 1869 /* Skip entry if on csa closed channel */ 1870 if (channel == priv->csa_chan) { 1871 mwifiex_dbg(adapter, WARN, 1872 "Dropping entry on csa closed channel\n"); 1873 return 0; 1874 } 1875 1876 band = BAND_G; 1877 if (radio_type) 1878 band = mwifiex_radio_type_to_band(*radio_type & 1879 (BIT(0) | BIT(1))); 1880 1881 cfp = mwifiex_get_cfp(priv, band, channel, 0); 1882 1883 freq = cfp ? cfp->freq : 0; 1884 1885 chan = ieee80211_get_channel(priv->wdev.wiphy, freq); 1886 1887 if (chan && !(chan->flags & IEEE80211_CHAN_DISABLED)) { 1888 bss = cfg80211_inform_bss(priv->wdev.wiphy, 1889 chan, CFG80211_BSS_FTYPE_UNKNOWN, 1890 bssid, timestamp, 1891 cap_info_bitmap, beacon_period, 1892 ie_buf, ie_len, rssi, GFP_ATOMIC); 1893 if (bss) { 1894 bss_priv = (struct mwifiex_bss_priv *)bss->priv; 1895 bss_priv->band = band; 1896 bss_priv->fw_tsf = fw_tsf; 1897 if (priv->media_connected && 1898 !memcmp(bssid, priv->curr_bss_params. 1899 bss_descriptor.mac_address, 1900 ETH_ALEN)) 1901 mwifiex_update_curr_bss_params(priv, 1902 bss); 1903 1904 if ((chan->flags & IEEE80211_CHAN_RADAR) || 1905 (chan->flags & IEEE80211_CHAN_NO_IR)) { 1906 mwifiex_dbg(adapter, INFO, 1907 "radar or passive channel %d\n", 1908 channel); 1909 mwifiex_save_hidden_ssid_channels(priv, 1910 bss); 1911 } 1912 1913 cfg80211_put_bss(priv->wdev.wiphy, bss); 1914 } 1915 } 1916 } else { 1917 mwifiex_dbg(adapter, WARN, "missing BSS channel IE\n"); 1918 } 1919 1920 return 0; 1921} 1922 1923static void mwifiex_complete_scan(struct mwifiex_private *priv) 1924{ 1925 struct mwifiex_adapter *adapter = priv->adapter; 1926 1927 adapter->survey_idx = 0; 1928 if (adapter->curr_cmd->wait_q_enabled) { 1929 adapter->cmd_wait_q.status = 0; 1930 if (!priv->scan_request) { 1931 mwifiex_dbg(adapter, INFO, 1932 "complete internal scan\n"); 1933 mwifiex_complete_cmd(adapter, adapter->curr_cmd); 1934 } 1935 } 1936} 1937 1938/* This function checks if any hidden SSID found in passive scan channels 1939 * and do specific SSID active scan for those channels 1940 */ 1941static int 1942mwifiex_active_scan_req_for_passive_chan(struct mwifiex_private *priv) 1943{ 1944 int ret; 1945 struct mwifiex_adapter *adapter = priv->adapter; 1946 u8 id = 0; 1947 struct mwifiex_user_scan_cfg *user_scan_cfg; 1948 1949 if (adapter->active_scan_triggered || !priv->scan_request || 1950 priv->scan_aborting) { 1951 adapter->active_scan_triggered = false; 1952 return 0; 1953 } 1954 1955 if (!priv->hidden_chan[0].chan_number) { 1956 mwifiex_dbg(adapter, INFO, "No BSS with hidden SSID found on DFS channels\n"); 1957 return 0; 1958 } 1959 user_scan_cfg = kzalloc(sizeof(*user_scan_cfg), GFP_KERNEL); 1960 1961 if (!user_scan_cfg) 1962 return -ENOMEM; 1963 1964 for (id = 0; id < MWIFIEX_USER_SCAN_CHAN_MAX; id++) { 1965 if (!priv->hidden_chan[id].chan_number) 1966 break; 1967 memcpy(&user_scan_cfg->chan_list[id], 1968 &priv->hidden_chan[id], 1969 sizeof(struct mwifiex_user_scan_chan)); 1970 } 1971 1972 adapter->active_scan_triggered = true; 1973 if (priv->scan_request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) 1974 ether_addr_copy(user_scan_cfg->random_mac, 1975 priv->scan_request->mac_addr); 1976 user_scan_cfg->num_ssids = priv->scan_request->n_ssids; 1977 user_scan_cfg->ssid_list = priv->scan_request->ssids; 1978 1979 ret = mwifiex_scan_networks(priv, user_scan_cfg); 1980 kfree(user_scan_cfg); 1981 1982 memset(&priv->hidden_chan, 0, sizeof(priv->hidden_chan)); 1983 1984 if (ret) { 1985 dev_err(priv->adapter->dev, "scan failed: %d\n", ret); 1986 return ret; 1987 } 1988 1989 return 0; 1990} 1991static void mwifiex_check_next_scan_command(struct mwifiex_private *priv) 1992{ 1993 struct mwifiex_adapter *adapter = priv->adapter; 1994 struct cmd_ctrl_node *cmd_node; 1995 1996 spin_lock_bh(&adapter->scan_pending_q_lock); 1997 if (list_empty(&adapter->scan_pending_q)) { 1998 spin_unlock_bh(&adapter->scan_pending_q_lock); 1999 2000 spin_lock_bh(&adapter->mwifiex_cmd_lock); 2001 adapter->scan_processing = false; 2002 spin_unlock_bh(&adapter->mwifiex_cmd_lock); 2003 2004 mwifiex_active_scan_req_for_passive_chan(priv); 2005 2006 if (!adapter->ext_scan) 2007 mwifiex_complete_scan(priv); 2008 2009 if (priv->scan_request) { 2010 struct cfg80211_scan_info info = { 2011 .aborted = false, 2012 }; 2013 2014 mwifiex_dbg(adapter, INFO, 2015 "info: notifying scan done\n"); 2016 cfg80211_scan_done(priv->scan_request, &info); 2017 priv->scan_request = NULL; 2018 priv->scan_aborting = false; 2019 } else { 2020 priv->scan_aborting = false; 2021 mwifiex_dbg(adapter, INFO, 2022 "info: scan already aborted\n"); 2023 } 2024 } else if ((priv->scan_aborting && !priv->scan_request) || 2025 priv->scan_block) { 2026 spin_unlock_bh(&adapter->scan_pending_q_lock); 2027 2028 mwifiex_cancel_pending_scan_cmd(adapter); 2029 2030 spin_lock_bh(&adapter->mwifiex_cmd_lock); 2031 adapter->scan_processing = false; 2032 spin_unlock_bh(&adapter->mwifiex_cmd_lock); 2033 2034 if (!adapter->active_scan_triggered) { 2035 if (priv->scan_request) { 2036 struct cfg80211_scan_info info = { 2037 .aborted = true, 2038 }; 2039 2040 mwifiex_dbg(adapter, INFO, 2041 "info: aborting scan\n"); 2042 cfg80211_scan_done(priv->scan_request, &info); 2043 priv->scan_request = NULL; 2044 priv->scan_aborting = false; 2045 } else { 2046 priv->scan_aborting = false; 2047 mwifiex_dbg(adapter, INFO, 2048 "info: scan already aborted\n"); 2049 } 2050 } 2051 } else { 2052 /* Get scan command from scan_pending_q and put to 2053 * cmd_pending_q 2054 */ 2055 cmd_node = list_first_entry(&adapter->scan_pending_q, 2056 struct cmd_ctrl_node, list); 2057 list_del(&cmd_node->list); 2058 spin_unlock_bh(&adapter->scan_pending_q_lock); 2059 mwifiex_insert_cmd_to_pending_q(adapter, cmd_node); 2060 } 2061 2062 return; 2063} 2064 2065void mwifiex_cancel_scan(struct mwifiex_adapter *adapter) 2066{ 2067 struct mwifiex_private *priv; 2068 int i; 2069 2070 mwifiex_cancel_pending_scan_cmd(adapter); 2071 2072 if (adapter->scan_processing) { 2073 spin_lock_bh(&adapter->mwifiex_cmd_lock); 2074 adapter->scan_processing = false; 2075 spin_unlock_bh(&adapter->mwifiex_cmd_lock); 2076 for (i = 0; i < adapter->priv_num; i++) { 2077 priv = adapter->priv[i]; 2078 if (!priv) 2079 continue; 2080 if (priv->scan_request) { 2081 struct cfg80211_scan_info info = { 2082 .aborted = true, 2083 }; 2084 2085 mwifiex_dbg(adapter, INFO, 2086 "info: aborting scan\n"); 2087 cfg80211_scan_done(priv->scan_request, &info); 2088 priv->scan_request = NULL; 2089 priv->scan_aborting = false; 2090 } 2091 } 2092 } 2093} 2094 2095/* 2096 * This function handles the command response of scan. 2097 * 2098 * The response buffer for the scan command has the following 2099 * memory layout: 2100 * 2101 * .-------------------------------------------------------------. 2102 * | Header (4 * sizeof(t_u16)): Standard command response hdr | 2103 * .-------------------------------------------------------------. 2104 * | BufSize (t_u16) : sizeof the BSS Description data | 2105 * .-------------------------------------------------------------. 2106 * | NumOfSet (t_u8) : Number of BSS Descs returned | 2107 * .-------------------------------------------------------------. 2108 * | BSSDescription data (variable, size given in BufSize) | 2109 * .-------------------------------------------------------------. 2110 * | TLV data (variable, size calculated using Header->Size, | 2111 * | BufSize and sizeof the fixed fields above) | 2112 * .-------------------------------------------------------------. 2113 */ 2114int mwifiex_ret_802_11_scan(struct mwifiex_private *priv, 2115 struct host_cmd_ds_command *resp) 2116{ 2117 int ret = 0; 2118 struct mwifiex_adapter *adapter = priv->adapter; 2119 struct host_cmd_ds_802_11_scan_rsp *scan_rsp; 2120 struct mwifiex_ie_types_data *tlv_data; 2121 struct mwifiex_ie_types_tsf_timestamp *tsf_tlv; 2122 u8 *bss_info; 2123 u32 scan_resp_size; 2124 u32 bytes_left; 2125 u32 idx; 2126 u32 tlv_buf_size; 2127 struct mwifiex_ie_types_chan_band_list_param_set *chan_band_tlv; 2128 struct chan_band_param_set *chan_band; 2129 u8 is_bgscan_resp; 2130 __le64 fw_tsf = 0; 2131 u8 *radio_type; 2132 struct cfg80211_wowlan_nd_match *pmatch; 2133 struct cfg80211_sched_scan_request *nd_config = NULL; 2134 2135 is_bgscan_resp = (le16_to_cpu(resp->command) 2136 == HostCmd_CMD_802_11_BG_SCAN_QUERY); 2137 if (is_bgscan_resp) 2138 scan_rsp = &resp->params.bg_scan_query_resp.scan_resp; 2139 else 2140 scan_rsp = &resp->params.scan_resp; 2141 2142 2143 if (scan_rsp->number_of_sets > MWIFIEX_MAX_AP) { 2144 mwifiex_dbg(adapter, ERROR, 2145 "SCAN_RESP: too many AP returned (%d)\n", 2146 scan_rsp->number_of_sets); 2147 ret = -1; 2148 goto check_next_scan; 2149 } 2150 2151 /* Check csa channel expiry before parsing scan response */ 2152 mwifiex_11h_get_csa_closed_channel(priv); 2153 2154 bytes_left = le16_to_cpu(scan_rsp->bss_descript_size); 2155 mwifiex_dbg(adapter, INFO, 2156 "info: SCAN_RESP: bss_descript_size %d\n", 2157 bytes_left); 2158 2159 scan_resp_size = le16_to_cpu(resp->size); 2160 2161 mwifiex_dbg(adapter, INFO, 2162 "info: SCAN_RESP: returned %d APs before parsing\n", 2163 scan_rsp->number_of_sets); 2164 2165 bss_info = scan_rsp->bss_desc_and_tlv_buffer; 2166 2167 /* 2168 * The size of the TLV buffer is equal to the entire command response 2169 * size (scan_resp_size) minus the fixed fields (sizeof()'s), the 2170 * BSS Descriptions (bss_descript_size as bytesLef) and the command 2171 * response header (S_DS_GEN) 2172 */ 2173 tlv_buf_size = scan_resp_size - (bytes_left 2174 + sizeof(scan_rsp->bss_descript_size) 2175 + sizeof(scan_rsp->number_of_sets) 2176 + S_DS_GEN); 2177 2178 tlv_data = (struct mwifiex_ie_types_data *) (scan_rsp-> 2179 bss_desc_and_tlv_buffer + 2180 bytes_left); 2181 2182 /* Search the TLV buffer space in the scan response for any valid 2183 TLVs */ 2184 mwifiex_ret_802_11_scan_get_tlv_ptrs(adapter, tlv_data, tlv_buf_size, 2185 TLV_TYPE_TSFTIMESTAMP, 2186 (struct mwifiex_ie_types_data **) 2187 &tsf_tlv); 2188 2189 /* Search the TLV buffer space in the scan response for any valid 2190 TLVs */ 2191 mwifiex_ret_802_11_scan_get_tlv_ptrs(adapter, tlv_data, tlv_buf_size, 2192 TLV_TYPE_CHANNELBANDLIST, 2193 (struct mwifiex_ie_types_data **) 2194 &chan_band_tlv); 2195 2196#ifdef CONFIG_PM 2197 if (priv->wdev.wiphy->wowlan_config) 2198 nd_config = priv->wdev.wiphy->wowlan_config->nd_config; 2199#endif 2200 2201 if (nd_config) { 2202 adapter->nd_info = 2203 kzalloc(struct_size(adapter->nd_info, matches, 2204 scan_rsp->number_of_sets), 2205 GFP_ATOMIC); 2206 2207 if (adapter->nd_info) 2208 adapter->nd_info->n_matches = scan_rsp->number_of_sets; 2209 } 2210 2211 for (idx = 0; idx < scan_rsp->number_of_sets && bytes_left; idx++) { 2212 /* 2213 * If the TSF TLV was appended to the scan results, save this 2214 * entry's TSF value in the fw_tsf field. It is the firmware's 2215 * TSF value at the time the beacon or probe response was 2216 * received. 2217 */ 2218 if (tsf_tlv) 2219 memcpy(&fw_tsf, &tsf_tlv->tsf_data[idx * TSF_DATA_SIZE], 2220 sizeof(fw_tsf)); 2221 2222 if (chan_band_tlv) { 2223 chan_band = &chan_band_tlv->chan_band_param[idx]; 2224 radio_type = &chan_band->radio_type; 2225 } else { 2226 radio_type = NULL; 2227 } 2228 2229 if (chan_band_tlv && adapter->nd_info) { 2230 adapter->nd_info->matches[idx] = 2231 kzalloc(sizeof(*pmatch) + sizeof(u32), 2232 GFP_ATOMIC); 2233 2234 pmatch = adapter->nd_info->matches[idx]; 2235 2236 if (pmatch) { 2237 pmatch->n_channels = 1; 2238 pmatch->channels[0] = chan_band->chan_number; 2239 } 2240 } 2241 2242 ret = mwifiex_parse_single_response_buf(priv, &bss_info, 2243 &bytes_left, 2244 le64_to_cpu(fw_tsf), 2245 radio_type, false, 0); 2246 if (ret) 2247 goto check_next_scan; 2248 } 2249 2250check_next_scan: 2251 mwifiex_check_next_scan_command(priv); 2252 return ret; 2253} 2254 2255/* 2256 * This function prepares an extended scan command to be sent to the firmware 2257 * 2258 * This uses the scan command configuration sent to the command processing 2259 * module in command preparation stage to configure a extended scan command 2260 * structure to send to firmware. 2261 */ 2262int mwifiex_cmd_802_11_scan_ext(struct mwifiex_private *priv, 2263 struct host_cmd_ds_command *cmd, 2264 void *data_buf) 2265{ 2266 struct host_cmd_ds_802_11_scan_ext *ext_scan = &cmd->params.ext_scan; 2267 struct mwifiex_scan_cmd_config *scan_cfg = data_buf; 2268 2269 memcpy(ext_scan->tlv_buffer, scan_cfg->tlv_buf, scan_cfg->tlv_buf_len); 2270 2271 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_SCAN_EXT); 2272 2273 /* Size is equal to the sizeof(fixed portions) + the TLV len + header */ 2274 cmd->size = cpu_to_le16((u16)(sizeof(ext_scan->reserved) 2275 + scan_cfg->tlv_buf_len + S_DS_GEN)); 2276 2277 return 0; 2278} 2279 2280/* This function prepares an background scan config command to be sent 2281 * to the firmware 2282 */ 2283int mwifiex_cmd_802_11_bg_scan_config(struct mwifiex_private *priv, 2284 struct host_cmd_ds_command *cmd, 2285 void *data_buf) 2286{ 2287 struct host_cmd_ds_802_11_bg_scan_config *bgscan_config = 2288 &cmd->params.bg_scan_config; 2289 struct mwifiex_bg_scan_cfg *bgscan_cfg_in = data_buf; 2290 u8 *tlv_pos = bgscan_config->tlv; 2291 u8 num_probes; 2292 u32 ssid_len, chan_idx, scan_type, scan_dur, chan_num; 2293 int i; 2294 struct mwifiex_ie_types_num_probes *num_probes_tlv; 2295 struct mwifiex_ie_types_repeat_count *repeat_count_tlv; 2296 struct mwifiex_ie_types_min_rssi_threshold *rssi_threshold_tlv; 2297 struct mwifiex_ie_types_bgscan_start_later *start_later_tlv; 2298 struct mwifiex_ie_types_wildcard_ssid_params *wildcard_ssid_tlv; 2299 struct mwifiex_ie_types_chan_list_param_set *chan_list_tlv; 2300 struct mwifiex_chan_scan_param_set *temp_chan; 2301 2302 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_BG_SCAN_CONFIG); 2303 cmd->size = cpu_to_le16(sizeof(*bgscan_config) + S_DS_GEN); 2304 2305 bgscan_config->action = cpu_to_le16(bgscan_cfg_in->action); 2306 bgscan_config->enable = bgscan_cfg_in->enable; 2307 bgscan_config->bss_type = bgscan_cfg_in->bss_type; 2308 bgscan_config->scan_interval = 2309 cpu_to_le32(bgscan_cfg_in->scan_interval); 2310 bgscan_config->report_condition = 2311 cpu_to_le32(bgscan_cfg_in->report_condition); 2312 2313 /* stop sched scan */ 2314 if (!bgscan_config->enable) 2315 return 0; 2316 2317 bgscan_config->chan_per_scan = bgscan_cfg_in->chan_per_scan; 2318 2319 num_probes = (bgscan_cfg_in->num_probes ? bgscan_cfg_in-> 2320 num_probes : priv->adapter->scan_probes); 2321 2322 if (num_probes) { 2323 num_probes_tlv = (struct mwifiex_ie_types_num_probes *)tlv_pos; 2324 num_probes_tlv->header.type = cpu_to_le16(TLV_TYPE_NUMPROBES); 2325 num_probes_tlv->header.len = 2326 cpu_to_le16(sizeof(num_probes_tlv->num_probes)); 2327 num_probes_tlv->num_probes = cpu_to_le16((u16)num_probes); 2328 2329 tlv_pos += sizeof(num_probes_tlv->header) + 2330 le16_to_cpu(num_probes_tlv->header.len); 2331 } 2332 2333 if (bgscan_cfg_in->repeat_count) { 2334 repeat_count_tlv = 2335 (struct mwifiex_ie_types_repeat_count *)tlv_pos; 2336 repeat_count_tlv->header.type = 2337 cpu_to_le16(TLV_TYPE_REPEAT_COUNT); 2338 repeat_count_tlv->header.len = 2339 cpu_to_le16(sizeof(repeat_count_tlv->repeat_count)); 2340 repeat_count_tlv->repeat_count = 2341 cpu_to_le16(bgscan_cfg_in->repeat_count); 2342 2343 tlv_pos += sizeof(repeat_count_tlv->header) + 2344 le16_to_cpu(repeat_count_tlv->header.len); 2345 } 2346 2347 if (bgscan_cfg_in->rssi_threshold) { 2348 rssi_threshold_tlv = 2349 (struct mwifiex_ie_types_min_rssi_threshold *)tlv_pos; 2350 rssi_threshold_tlv->header.type = 2351 cpu_to_le16(TLV_TYPE_RSSI_LOW); 2352 rssi_threshold_tlv->header.len = 2353 cpu_to_le16(sizeof(rssi_threshold_tlv->rssi_threshold)); 2354 rssi_threshold_tlv->rssi_threshold = 2355 cpu_to_le16(bgscan_cfg_in->rssi_threshold); 2356 2357 tlv_pos += sizeof(rssi_threshold_tlv->header) + 2358 le16_to_cpu(rssi_threshold_tlv->header.len); 2359 } 2360 2361 for (i = 0; i < bgscan_cfg_in->num_ssids; i++) { 2362 ssid_len = bgscan_cfg_in->ssid_list[i].ssid.ssid_len; 2363 2364 wildcard_ssid_tlv = 2365 (struct mwifiex_ie_types_wildcard_ssid_params *)tlv_pos; 2366 wildcard_ssid_tlv->header.type = 2367 cpu_to_le16(TLV_TYPE_WILDCARDSSID); 2368 wildcard_ssid_tlv->header.len = cpu_to_le16( 2369 (u16)(ssid_len + sizeof(wildcard_ssid_tlv-> 2370 max_ssid_length))); 2371 2372 /* max_ssid_length = 0 tells firmware to perform 2373 * specific scan for the SSID filled, whereas 2374 * max_ssid_length = IEEE80211_MAX_SSID_LEN is for 2375 * wildcard scan. 2376 */ 2377 if (ssid_len) 2378 wildcard_ssid_tlv->max_ssid_length = 0; 2379 else 2380 wildcard_ssid_tlv->max_ssid_length = 2381 IEEE80211_MAX_SSID_LEN; 2382 2383 memcpy(wildcard_ssid_tlv->ssid, 2384 bgscan_cfg_in->ssid_list[i].ssid.ssid, ssid_len); 2385 2386 tlv_pos += (sizeof(wildcard_ssid_tlv->header) 2387 + le16_to_cpu(wildcard_ssid_tlv->header.len)); 2388 } 2389 2390 chan_list_tlv = (struct mwifiex_ie_types_chan_list_param_set *)tlv_pos; 2391 2392 if (bgscan_cfg_in->chan_list[0].chan_number) { 2393 dev_dbg(priv->adapter->dev, "info: bgscan: Using supplied channel list\n"); 2394 2395 chan_list_tlv->header.type = cpu_to_le16(TLV_TYPE_CHANLIST); 2396 2397 for (chan_idx = 0; 2398 chan_idx < MWIFIEX_BG_SCAN_CHAN_MAX && 2399 bgscan_cfg_in->chan_list[chan_idx].chan_number; 2400 chan_idx++) { 2401 temp_chan = chan_list_tlv->chan_scan_param + chan_idx; 2402 2403 /* Increment the TLV header length by size appended */ 2404 le16_unaligned_add_cpu(&chan_list_tlv->header.len, 2405 sizeof( 2406 chan_list_tlv->chan_scan_param)); 2407 2408 temp_chan->chan_number = 2409 bgscan_cfg_in->chan_list[chan_idx].chan_number; 2410 temp_chan->radio_type = 2411 bgscan_cfg_in->chan_list[chan_idx].radio_type; 2412 2413 scan_type = 2414 bgscan_cfg_in->chan_list[chan_idx].scan_type; 2415 2416 if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE) 2417 temp_chan->chan_scan_mode_bitmap 2418 |= MWIFIEX_PASSIVE_SCAN; 2419 else 2420 temp_chan->chan_scan_mode_bitmap 2421 &= ~MWIFIEX_PASSIVE_SCAN; 2422 2423 if (bgscan_cfg_in->chan_list[chan_idx].scan_time) { 2424 scan_dur = (u16)bgscan_cfg_in-> 2425 chan_list[chan_idx].scan_time; 2426 } else { 2427 scan_dur = (scan_type == 2428 MWIFIEX_SCAN_TYPE_PASSIVE) ? 2429 priv->adapter->passive_scan_time : 2430 priv->adapter->specific_scan_time; 2431 } 2432 2433 temp_chan->min_scan_time = cpu_to_le16(scan_dur); 2434 temp_chan->max_scan_time = cpu_to_le16(scan_dur); 2435 } 2436 } else { 2437 dev_dbg(priv->adapter->dev, 2438 "info: bgscan: Creating full region channel list\n"); 2439 chan_num = 2440 mwifiex_bgscan_create_channel_list(priv, bgscan_cfg_in, 2441 chan_list_tlv-> 2442 chan_scan_param); 2443 le16_unaligned_add_cpu(&chan_list_tlv->header.len, 2444 chan_num * 2445 sizeof(chan_list_tlv->chan_scan_param[0])); 2446 } 2447 2448 tlv_pos += (sizeof(chan_list_tlv->header) 2449 + le16_to_cpu(chan_list_tlv->header.len)); 2450 2451 if (bgscan_cfg_in->start_later) { 2452 start_later_tlv = 2453 (struct mwifiex_ie_types_bgscan_start_later *)tlv_pos; 2454 start_later_tlv->header.type = 2455 cpu_to_le16(TLV_TYPE_BGSCAN_START_LATER); 2456 start_later_tlv->header.len = 2457 cpu_to_le16(sizeof(start_later_tlv->start_later)); 2458 start_later_tlv->start_later = 2459 cpu_to_le16(bgscan_cfg_in->start_later); 2460 2461 tlv_pos += sizeof(start_later_tlv->header) + 2462 le16_to_cpu(start_later_tlv->header.len); 2463 } 2464 2465 /* Append vendor specific IE TLV */ 2466 mwifiex_cmd_append_vsie_tlv(priv, MWIFIEX_VSIE_MASK_BGSCAN, &tlv_pos); 2467 2468 le16_unaligned_add_cpu(&cmd->size, tlv_pos - bgscan_config->tlv); 2469 2470 return 0; 2471} 2472 2473int mwifiex_stop_bg_scan(struct mwifiex_private *priv) 2474{ 2475 struct mwifiex_bg_scan_cfg *bgscan_cfg; 2476 2477 if (!priv->sched_scanning) { 2478 dev_dbg(priv->adapter->dev, "bgscan already stopped!\n"); 2479 return 0; 2480 } 2481 2482 bgscan_cfg = kzalloc(sizeof(*bgscan_cfg), GFP_KERNEL); 2483 if (!bgscan_cfg) 2484 return -ENOMEM; 2485 2486 bgscan_cfg->bss_type = MWIFIEX_BSS_MODE_INFRA; 2487 bgscan_cfg->action = MWIFIEX_BGSCAN_ACT_SET; 2488 bgscan_cfg->enable = false; 2489 2490 if (mwifiex_send_cmd(priv, HostCmd_CMD_802_11_BG_SCAN_CONFIG, 2491 HostCmd_ACT_GEN_SET, 0, bgscan_cfg, true)) { 2492 kfree(bgscan_cfg); 2493 return -EFAULT; 2494 } 2495 2496 kfree(bgscan_cfg); 2497 priv->sched_scanning = false; 2498 2499 return 0; 2500} 2501 2502static void 2503mwifiex_update_chan_statistics(struct mwifiex_private *priv, 2504 struct mwifiex_ietypes_chanstats *tlv_stat) 2505{ 2506 struct mwifiex_adapter *adapter = priv->adapter; 2507 u8 i, num_chan; 2508 struct mwifiex_fw_chan_stats *fw_chan_stats; 2509 struct mwifiex_chan_stats chan_stats; 2510 2511 fw_chan_stats = (void *)((u8 *)tlv_stat + 2512 sizeof(struct mwifiex_ie_types_header)); 2513 num_chan = le16_to_cpu(tlv_stat->header.len) / 2514 sizeof(struct mwifiex_chan_stats); 2515 2516 for (i = 0 ; i < num_chan; i++) { 2517 if (adapter->survey_idx >= adapter->num_in_chan_stats) { 2518 mwifiex_dbg(adapter, WARN, 2519 "FW reported too many channel results (max %d)\n", 2520 adapter->num_in_chan_stats); 2521 return; 2522 } 2523 chan_stats.chan_num = fw_chan_stats->chan_num; 2524 chan_stats.bandcfg = fw_chan_stats->bandcfg; 2525 chan_stats.flags = fw_chan_stats->flags; 2526 chan_stats.noise = fw_chan_stats->noise; 2527 chan_stats.total_bss = le16_to_cpu(fw_chan_stats->total_bss); 2528 chan_stats.cca_scan_dur = 2529 le16_to_cpu(fw_chan_stats->cca_scan_dur); 2530 chan_stats.cca_busy_dur = 2531 le16_to_cpu(fw_chan_stats->cca_busy_dur); 2532 mwifiex_dbg(adapter, INFO, 2533 "chan=%d, noise=%d, total_network=%d scan_duration=%d, busy_duration=%d\n", 2534 chan_stats.chan_num, 2535 chan_stats.noise, 2536 chan_stats.total_bss, 2537 chan_stats.cca_scan_dur, 2538 chan_stats.cca_busy_dur); 2539 memcpy(&adapter->chan_stats[adapter->survey_idx++], &chan_stats, 2540 sizeof(struct mwifiex_chan_stats)); 2541 fw_chan_stats++; 2542 } 2543} 2544 2545/* This function handles the command response of extended scan */ 2546int mwifiex_ret_802_11_scan_ext(struct mwifiex_private *priv, 2547 struct host_cmd_ds_command *resp) 2548{ 2549 struct mwifiex_adapter *adapter = priv->adapter; 2550 struct host_cmd_ds_802_11_scan_ext *ext_scan_resp; 2551 struct mwifiex_ie_types_header *tlv; 2552 struct mwifiex_ietypes_chanstats *tlv_stat; 2553 u16 buf_left, type, len; 2554 2555 struct host_cmd_ds_command *cmd_ptr; 2556 struct cmd_ctrl_node *cmd_node; 2557 bool complete_scan = false; 2558 2559 mwifiex_dbg(adapter, INFO, "info: EXT scan returns successfully\n"); 2560 2561 ext_scan_resp = &resp->params.ext_scan; 2562 2563 tlv = (void *)ext_scan_resp->tlv_buffer; 2564 buf_left = le16_to_cpu(resp->size) - (sizeof(*ext_scan_resp) + S_DS_GEN 2565 - 1); 2566 2567 while (buf_left >= sizeof(struct mwifiex_ie_types_header)) { 2568 type = le16_to_cpu(tlv->type); 2569 len = le16_to_cpu(tlv->len); 2570 2571 if (buf_left < (sizeof(struct mwifiex_ie_types_header) + len)) { 2572 mwifiex_dbg(adapter, ERROR, 2573 "error processing scan response TLVs"); 2574 break; 2575 } 2576 2577 switch (type) { 2578 case TLV_TYPE_CHANNEL_STATS: 2579 tlv_stat = (void *)tlv; 2580 mwifiex_update_chan_statistics(priv, tlv_stat); 2581 break; 2582 default: 2583 break; 2584 } 2585 2586 buf_left -= len + sizeof(struct mwifiex_ie_types_header); 2587 tlv = (void *)((u8 *)tlv + len + 2588 sizeof(struct mwifiex_ie_types_header)); 2589 } 2590 2591 spin_lock_bh(&adapter->cmd_pending_q_lock); 2592 spin_lock_bh(&adapter->scan_pending_q_lock); 2593 if (list_empty(&adapter->scan_pending_q)) { 2594 complete_scan = true; 2595 list_for_each_entry(cmd_node, &adapter->cmd_pending_q, list) { 2596 cmd_ptr = (void *)cmd_node->cmd_skb->data; 2597 if (le16_to_cpu(cmd_ptr->command) == 2598 HostCmd_CMD_802_11_SCAN_EXT) { 2599 mwifiex_dbg(adapter, INFO, 2600 "Scan pending in command pending list"); 2601 complete_scan = false; 2602 break; 2603 } 2604 } 2605 } 2606 spin_unlock_bh(&adapter->scan_pending_q_lock); 2607 spin_unlock_bh(&adapter->cmd_pending_q_lock); 2608 2609 if (complete_scan) 2610 mwifiex_complete_scan(priv); 2611 2612 return 0; 2613} 2614 2615/* This function This function handles the event extended scan report. It 2616 * parses extended scan results and informs to cfg80211 stack. 2617 */ 2618int mwifiex_handle_event_ext_scan_report(struct mwifiex_private *priv, 2619 void *buf) 2620{ 2621 int ret = 0; 2622 struct mwifiex_adapter *adapter = priv->adapter; 2623 u8 *bss_info; 2624 u32 bytes_left, bytes_left_for_tlv, idx; 2625 u16 type, len; 2626 struct mwifiex_ie_types_data *tlv; 2627 struct mwifiex_ie_types_bss_scan_rsp *scan_rsp_tlv; 2628 struct mwifiex_ie_types_bss_scan_info *scan_info_tlv; 2629 u8 *radio_type; 2630 u64 fw_tsf = 0; 2631 s32 rssi = 0; 2632 struct mwifiex_event_scan_result *event_scan = buf; 2633 u8 num_of_set = event_scan->num_of_set; 2634 u8 *scan_resp = buf + sizeof(struct mwifiex_event_scan_result); 2635 u16 scan_resp_size = le16_to_cpu(event_scan->buf_size); 2636 2637 if (num_of_set > MWIFIEX_MAX_AP) { 2638 mwifiex_dbg(adapter, ERROR, 2639 "EXT_SCAN: Invalid number of AP returned (%d)!!\n", 2640 num_of_set); 2641 ret = -1; 2642 goto check_next_scan; 2643 } 2644 2645 bytes_left = scan_resp_size; 2646 mwifiex_dbg(adapter, INFO, 2647 "EXT_SCAN: size %d, returned %d APs...", 2648 scan_resp_size, num_of_set); 2649 mwifiex_dbg_dump(adapter, CMD_D, "EXT_SCAN buffer:", buf, 2650 scan_resp_size + 2651 sizeof(struct mwifiex_event_scan_result)); 2652 2653 tlv = (struct mwifiex_ie_types_data *)scan_resp; 2654 2655 for (idx = 0; idx < num_of_set && bytes_left; idx++) { 2656 type = le16_to_cpu(tlv->header.type); 2657 len = le16_to_cpu(tlv->header.len); 2658 if (bytes_left < sizeof(struct mwifiex_ie_types_header) + len) { 2659 mwifiex_dbg(adapter, ERROR, 2660 "EXT_SCAN: Error bytes left < TLV length\n"); 2661 break; 2662 } 2663 scan_rsp_tlv = NULL; 2664 scan_info_tlv = NULL; 2665 bytes_left_for_tlv = bytes_left; 2666 2667 /* BSS response TLV with beacon or probe response buffer 2668 * at the initial position of each descriptor 2669 */ 2670 if (type != TLV_TYPE_BSS_SCAN_RSP) 2671 break; 2672 2673 bss_info = (u8 *)tlv; 2674 scan_rsp_tlv = (struct mwifiex_ie_types_bss_scan_rsp *)tlv; 2675 tlv = (struct mwifiex_ie_types_data *)(tlv->data + len); 2676 bytes_left_for_tlv -= 2677 (len + sizeof(struct mwifiex_ie_types_header)); 2678 2679 while (bytes_left_for_tlv >= 2680 sizeof(struct mwifiex_ie_types_header) && 2681 le16_to_cpu(tlv->header.type) != TLV_TYPE_BSS_SCAN_RSP) { 2682 type = le16_to_cpu(tlv->header.type); 2683 len = le16_to_cpu(tlv->header.len); 2684 if (bytes_left_for_tlv < 2685 sizeof(struct mwifiex_ie_types_header) + len) { 2686 mwifiex_dbg(adapter, ERROR, 2687 "EXT_SCAN: Error in processing TLV,\t" 2688 "bytes left < TLV length\n"); 2689 scan_rsp_tlv = NULL; 2690 bytes_left_for_tlv = 0; 2691 continue; 2692 } 2693 switch (type) { 2694 case TLV_TYPE_BSS_SCAN_INFO: 2695 scan_info_tlv = 2696 (struct mwifiex_ie_types_bss_scan_info *)tlv; 2697 if (len != 2698 sizeof(struct mwifiex_ie_types_bss_scan_info) - 2699 sizeof(struct mwifiex_ie_types_header)) { 2700 bytes_left_for_tlv = 0; 2701 continue; 2702 } 2703 break; 2704 default: 2705 break; 2706 } 2707 tlv = (struct mwifiex_ie_types_data *)(tlv->data + len); 2708 bytes_left -= 2709 (len + sizeof(struct mwifiex_ie_types_header)); 2710 bytes_left_for_tlv -= 2711 (len + sizeof(struct mwifiex_ie_types_header)); 2712 } 2713 2714 if (!scan_rsp_tlv) 2715 break; 2716 2717 /* Advance pointer to the beacon buffer length and 2718 * update the bytes count so that the function 2719 * wlan_interpret_bss_desc_with_ie() can handle the 2720 * scan buffer withut any change 2721 */ 2722 bss_info += sizeof(u16); 2723 bytes_left -= sizeof(u16); 2724 2725 if (scan_info_tlv) { 2726 rssi = (s32)(s16)(le16_to_cpu(scan_info_tlv->rssi)); 2727 rssi *= 100; /* Convert dBm to mBm */ 2728 mwifiex_dbg(adapter, INFO, 2729 "info: InterpretIE: RSSI=%d\n", rssi); 2730 fw_tsf = le64_to_cpu(scan_info_tlv->tsf); 2731 radio_type = &scan_info_tlv->radio_type; 2732 } else { 2733 radio_type = NULL; 2734 } 2735 ret = mwifiex_parse_single_response_buf(priv, &bss_info, 2736 &bytes_left, fw_tsf, 2737 radio_type, true, rssi); 2738 if (ret) 2739 goto check_next_scan; 2740 } 2741 2742check_next_scan: 2743 if (!event_scan->more_event) 2744 mwifiex_check_next_scan_command(priv); 2745 2746 return ret; 2747} 2748 2749/* 2750 * This function prepares command for background scan query. 2751 * 2752 * Preparation includes - 2753 * - Setting command ID and proper size 2754 * - Setting background scan flush parameter 2755 * - Ensuring correct endian-ness 2756 */ 2757int mwifiex_cmd_802_11_bg_scan_query(struct host_cmd_ds_command *cmd) 2758{ 2759 struct host_cmd_ds_802_11_bg_scan_query *bg_query = 2760 &cmd->params.bg_scan_query; 2761 2762 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_BG_SCAN_QUERY); 2763 cmd->size = cpu_to_le16(sizeof(struct host_cmd_ds_802_11_bg_scan_query) 2764 + S_DS_GEN); 2765 2766 bg_query->flush = 1; 2767 2768 return 0; 2769} 2770 2771/* 2772 * This function inserts scan command node to the scan pending queue. 2773 */ 2774void 2775mwifiex_queue_scan_cmd(struct mwifiex_private *priv, 2776 struct cmd_ctrl_node *cmd_node) 2777{ 2778 struct mwifiex_adapter *adapter = priv->adapter; 2779 2780 cmd_node->wait_q_enabled = true; 2781 cmd_node->condition = &adapter->scan_wait_q_woken; 2782 spin_lock_bh(&adapter->scan_pending_q_lock); 2783 list_add_tail(&cmd_node->list, &adapter->scan_pending_q); 2784 spin_unlock_bh(&adapter->scan_pending_q_lock); 2785} 2786 2787/* 2788 * This function sends a scan command for all available channels to the 2789 * firmware, filtered on a specific SSID. 2790 */ 2791static int mwifiex_scan_specific_ssid(struct mwifiex_private *priv, 2792 struct cfg80211_ssid *req_ssid) 2793{ 2794 struct mwifiex_adapter *adapter = priv->adapter; 2795 int ret; 2796 struct mwifiex_user_scan_cfg *scan_cfg; 2797 2798 if (adapter->scan_processing) { 2799 mwifiex_dbg(adapter, WARN, 2800 "cmd: Scan already in process...\n"); 2801 return -EBUSY; 2802 } 2803 2804 if (priv->scan_block) { 2805 mwifiex_dbg(adapter, WARN, 2806 "cmd: Scan is blocked during association...\n"); 2807 return -EBUSY; 2808 } 2809 2810 scan_cfg = kzalloc(sizeof(struct mwifiex_user_scan_cfg), GFP_KERNEL); 2811 if (!scan_cfg) 2812 return -ENOMEM; 2813 2814 scan_cfg->ssid_list = req_ssid; 2815 scan_cfg->num_ssids = 1; 2816 2817 ret = mwifiex_scan_networks(priv, scan_cfg); 2818 2819 kfree(scan_cfg); 2820 return ret; 2821} 2822 2823/* 2824 * Sends IOCTL request to start a scan. 2825 * 2826 * This function allocates the IOCTL request buffer, fills it 2827 * with requisite parameters and calls the IOCTL handler. 2828 * 2829 * Scan command can be issued for both normal scan and specific SSID 2830 * scan, depending upon whether an SSID is provided or not. 2831 */ 2832int mwifiex_request_scan(struct mwifiex_private *priv, 2833 struct cfg80211_ssid *req_ssid) 2834{ 2835 int ret; 2836 2837 if (mutex_lock_interruptible(&priv->async_mutex)) { 2838 mwifiex_dbg(priv->adapter, ERROR, 2839 "%s: acquire semaphore fail\n", 2840 __func__); 2841 return -1; 2842 } 2843 2844 priv->adapter->scan_wait_q_woken = false; 2845 2846 if (req_ssid && req_ssid->ssid_len != 0) 2847 /* Specific SSID scan */ 2848 ret = mwifiex_scan_specific_ssid(priv, req_ssid); 2849 else 2850 /* Normal scan */ 2851 ret = mwifiex_scan_networks(priv, NULL); 2852 2853 mutex_unlock(&priv->async_mutex); 2854 2855 return ret; 2856} 2857 2858/* 2859 * This function appends the vendor specific IE TLV to a buffer. 2860 */ 2861int 2862mwifiex_cmd_append_vsie_tlv(struct mwifiex_private *priv, 2863 u16 vsie_mask, u8 **buffer) 2864{ 2865 int id, ret_len = 0; 2866 struct mwifiex_ie_types_vendor_param_set *vs_param_set; 2867 2868 if (!buffer) 2869 return 0; 2870 if (!(*buffer)) 2871 return 0; 2872 2873 /* 2874 * Traverse through the saved vendor specific IE array and append 2875 * the selected(scan/assoc/adhoc) IE as TLV to the command 2876 */ 2877 for (id = 0; id < MWIFIEX_MAX_VSIE_NUM; id++) { 2878 if (priv->vs_ie[id].mask & vsie_mask) { 2879 vs_param_set = 2880 (struct mwifiex_ie_types_vendor_param_set *) 2881 *buffer; 2882 vs_param_set->header.type = 2883 cpu_to_le16(TLV_TYPE_PASSTHROUGH); 2884 vs_param_set->header.len = 2885 cpu_to_le16((((u16) priv->vs_ie[id].ie[1]) 2886 & 0x00FF) + 2); 2887 if (le16_to_cpu(vs_param_set->header.len) > 2888 MWIFIEX_MAX_VSIE_LEN) { 2889 mwifiex_dbg(priv->adapter, ERROR, 2890 "Invalid param length!\n"); 2891 break; 2892 } 2893 2894 memcpy(vs_param_set->ie, priv->vs_ie[id].ie, 2895 le16_to_cpu(vs_param_set->header.len)); 2896 *buffer += le16_to_cpu(vs_param_set->header.len) + 2897 sizeof(struct mwifiex_ie_types_header); 2898 ret_len += le16_to_cpu(vs_param_set->header.len) + 2899 sizeof(struct mwifiex_ie_types_header); 2900 } 2901 } 2902 return ret_len; 2903} 2904 2905/* 2906 * This function saves a beacon buffer of the current BSS descriptor. 2907 * 2908 * The current beacon buffer is saved so that it can be restored in the 2909 * following cases that makes the beacon buffer not to contain the current 2910 * ssid's beacon buffer. 2911 * - The current ssid was not found somehow in the last scan. 2912 * - The current ssid was the last entry of the scan table and overloaded. 2913 */ 2914void 2915mwifiex_save_curr_bcn(struct mwifiex_private *priv) 2916{ 2917 struct mwifiex_bssdescriptor *curr_bss = 2918 &priv->curr_bss_params.bss_descriptor; 2919 2920 if (!curr_bss->beacon_buf_size) 2921 return; 2922 2923 /* allocate beacon buffer at 1st time; or if it's size has changed */ 2924 if (!priv->curr_bcn_buf || 2925 priv->curr_bcn_size != curr_bss->beacon_buf_size) { 2926 priv->curr_bcn_size = curr_bss->beacon_buf_size; 2927 2928 kfree(priv->curr_bcn_buf); 2929 priv->curr_bcn_buf = kmalloc(curr_bss->beacon_buf_size, 2930 GFP_ATOMIC); 2931 if (!priv->curr_bcn_buf) 2932 return; 2933 } 2934 2935 memcpy(priv->curr_bcn_buf, curr_bss->beacon_buf, 2936 curr_bss->beacon_buf_size); 2937 mwifiex_dbg(priv->adapter, INFO, 2938 "info: current beacon saved %d\n", 2939 priv->curr_bcn_size); 2940 2941 curr_bss->beacon_buf = priv->curr_bcn_buf; 2942 2943 /* adjust the pointers in the current BSS descriptor */ 2944 if (curr_bss->bcn_wpa_ie) 2945 curr_bss->bcn_wpa_ie = 2946 (struct ieee_types_vendor_specific *) 2947 (curr_bss->beacon_buf + 2948 curr_bss->wpa_offset); 2949 2950 if (curr_bss->bcn_rsn_ie) 2951 curr_bss->bcn_rsn_ie = (struct ieee_types_generic *) 2952 (curr_bss->beacon_buf + 2953 curr_bss->rsn_offset); 2954 2955 if (curr_bss->bcn_ht_cap) 2956 curr_bss->bcn_ht_cap = (struct ieee80211_ht_cap *) 2957 (curr_bss->beacon_buf + 2958 curr_bss->ht_cap_offset); 2959 2960 if (curr_bss->bcn_ht_oper) 2961 curr_bss->bcn_ht_oper = (struct ieee80211_ht_operation *) 2962 (curr_bss->beacon_buf + 2963 curr_bss->ht_info_offset); 2964 2965 if (curr_bss->bcn_vht_cap) 2966 curr_bss->bcn_vht_cap = (void *)(curr_bss->beacon_buf + 2967 curr_bss->vht_cap_offset); 2968 2969 if (curr_bss->bcn_vht_oper) 2970 curr_bss->bcn_vht_oper = (void *)(curr_bss->beacon_buf + 2971 curr_bss->vht_info_offset); 2972 2973 if (curr_bss->bcn_bss_co_2040) 2974 curr_bss->bcn_bss_co_2040 = 2975 (curr_bss->beacon_buf + curr_bss->bss_co_2040_offset); 2976 2977 if (curr_bss->bcn_ext_cap) 2978 curr_bss->bcn_ext_cap = curr_bss->beacon_buf + 2979 curr_bss->ext_cap_offset; 2980 2981 if (curr_bss->oper_mode) 2982 curr_bss->oper_mode = (void *)(curr_bss->beacon_buf + 2983 curr_bss->oper_mode_offset); 2984} 2985 2986/* 2987 * This function frees the current BSS descriptor beacon buffer. 2988 */ 2989void 2990mwifiex_free_curr_bcn(struct mwifiex_private *priv) 2991{ 2992 kfree(priv->curr_bcn_buf); 2993 priv->curr_bcn_buf = NULL; 2994} 2995