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 58 union 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 65 enum cipher_suite { 66 CIPHER_SUITE_TKIP, 67 CIPHER_SUITE_CCMP, 68 CIPHER_SUITE_MAX 69 }; 70 static u8 mwifiex_wpa_oui[CIPHER_SUITE_MAX][4] = { 71 { 0x00, 0x50, 0xf2, 0x02 }, /* TKIP */ 72 { 0x00, 0x50, 0xf2, 0x04 }, /* AES */ 73 }; 74 static u8 mwifiex_rsn_oui[CIPHER_SUITE_MAX][4] = { 75 { 0x00, 0x0f, 0xac, 0x02 }, /* TKIP */ 76 { 0x00, 0x0f, 0xac, 0x04 }, /* AES */ 77 }; 78 79 static 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) 99 100 static bool 101 has_ieee_hdr(struct ieee_types_generic *ie, u8 key) 102 { 103 return (ie && ie->ieee_hdr.element_id == key); 104 } 105 106 static bool 107 has_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 */ 118 static u8 119 mwifiex_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 */ 150 static u8 151 mwifiex_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 */ 176 static u8 177 mwifiex_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 */ 197 s32 198 mwifiex_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 */ 209 static bool 210 mwifiex_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 */ 223 static bool 224 mwifiex_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 */ 241 static bool 242 mwifiex_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 */ 256 static bool 257 mwifiex_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 */ 278 static bool 279 mwifiex_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 */ 299 static bool 300 mwifiex_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 */ 317 static bool 318 mwifiex_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 */ 350 static s32 351 mwifiex_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 */ 454 static int 455 mwifiex_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 */ 523 static int 524 mwifiex_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. */ 576 static int 577 mwifiex_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 */ 616 static int 617 mwifiex_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 */ 816 static void 817 mwifiex_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 */ 1140 static void 1141 mwifiex_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 */ 1211 int mwifiex_update_bss_desc_with_ie(struct mwifiex_adapter *adapter, 1212 struct mwifiex_bssdescriptor *bss_entry) 1213 { 1214 u8 element_id; 1215 struct ieee_types_fh_param_set *fh_param_set; 1216 struct ieee_types_ds_param_set *ds_param_set; 1217 struct ieee_types_cf_param_set *cf_param_set; 1218 struct ieee_types_ibss_param_set *ibss_param_set; 1219 u8 *current_ptr; 1220 u8 *rate; 1221 u8 element_len; 1222 u16 total_ie_len; 1223 u8 bytes_to_copy; 1224 u8 rate_size; 1225 u8 found_data_rate_ie; 1226 u32 bytes_left; 1227 struct ieee_types_vendor_specific *vendor_ie; 1228 const u8 wpa_oui[4] = { 0x00, 0x50, 0xf2, 0x01 }; 1229 const u8 wmm_oui[4] = { 0x00, 0x50, 0xf2, 0x02 }; 1230 1231 found_data_rate_ie = false; 1232 rate_size = 0; 1233 current_ptr = bss_entry->beacon_buf; 1234 bytes_left = bss_entry->beacon_buf_size; 1235 1236 /* Process variable IE */ 1237 while (bytes_left >= 2) { 1238 element_id = *current_ptr; 1239 element_len = *(current_ptr + 1); 1240 total_ie_len = element_len + sizeof(struct ieee_types_header); 1241 1242 if (bytes_left < total_ie_len) { 1243 mwifiex_dbg(adapter, ERROR, 1244 "err: InterpretIE: in processing\t" 1245 "IE, bytes left < IE length\n"); 1246 return -EINVAL; 1247 } 1248 switch (element_id) { 1249 case WLAN_EID_SSID: 1250 if (element_len > IEEE80211_MAX_SSID_LEN) 1251 return -EINVAL; 1252 bss_entry->ssid.ssid_len = element_len; 1253 memcpy(bss_entry->ssid.ssid, (current_ptr + 2), 1254 element_len); 1255 mwifiex_dbg(adapter, INFO, 1256 "info: InterpretIE: ssid: %-32s\n", 1257 bss_entry->ssid.ssid); 1258 break; 1259 1260 case WLAN_EID_SUPP_RATES: 1261 if (element_len > MWIFIEX_SUPPORTED_RATES) 1262 return -EINVAL; 1263 memcpy(bss_entry->data_rates, current_ptr + 2, 1264 element_len); 1265 memcpy(bss_entry->supported_rates, current_ptr + 2, 1266 element_len); 1267 rate_size = element_len; 1268 found_data_rate_ie = true; 1269 break; 1270 1271 case WLAN_EID_FH_PARAMS: 1272 if (total_ie_len < sizeof(*fh_param_set)) 1273 return -EINVAL; 1274 fh_param_set = 1275 (struct ieee_types_fh_param_set *) current_ptr; 1276 memcpy(&bss_entry->phy_param_set.fh_param_set, 1277 fh_param_set, 1278 sizeof(struct ieee_types_fh_param_set)); 1279 break; 1280 1281 case WLAN_EID_DS_PARAMS: 1282 if (total_ie_len < sizeof(*ds_param_set)) 1283 return -EINVAL; 1284 ds_param_set = 1285 (struct ieee_types_ds_param_set *) current_ptr; 1286 1287 bss_entry->channel = ds_param_set->current_chan; 1288 1289 memcpy(&bss_entry->phy_param_set.ds_param_set, 1290 ds_param_set, 1291 sizeof(struct ieee_types_ds_param_set)); 1292 break; 1293 1294 case WLAN_EID_CF_PARAMS: 1295 if (total_ie_len < sizeof(*cf_param_set)) 1296 return -EINVAL; 1297 cf_param_set = 1298 (struct ieee_types_cf_param_set *) current_ptr; 1299 memcpy(&bss_entry->ss_param_set.cf_param_set, 1300 cf_param_set, 1301 sizeof(struct ieee_types_cf_param_set)); 1302 break; 1303 1304 case WLAN_EID_IBSS_PARAMS: 1305 if (total_ie_len < sizeof(*ibss_param_set)) 1306 return -EINVAL; 1307 ibss_param_set = 1308 (struct ieee_types_ibss_param_set *) 1309 current_ptr; 1310 memcpy(&bss_entry->ss_param_set.ibss_param_set, 1311 ibss_param_set, 1312 sizeof(struct ieee_types_ibss_param_set)); 1313 break; 1314 1315 case WLAN_EID_ERP_INFO: 1316 if (!element_len) 1317 return -EINVAL; 1318 bss_entry->erp_flags = *(current_ptr + 2); 1319 break; 1320 1321 case WLAN_EID_PWR_CONSTRAINT: 1322 if (!element_len) 1323 return -EINVAL; 1324 bss_entry->local_constraint = *(current_ptr + 2); 1325 bss_entry->sensed_11h = true; 1326 break; 1327 1328 case WLAN_EID_CHANNEL_SWITCH: 1329 bss_entry->chan_sw_ie_present = true; 1330 fallthrough; 1331 case WLAN_EID_PWR_CAPABILITY: 1332 case WLAN_EID_TPC_REPORT: 1333 case WLAN_EID_QUIET: 1334 bss_entry->sensed_11h = true; 1335 break; 1336 1337 case WLAN_EID_EXT_SUPP_RATES: 1338 /* 1339 * Only process extended supported rate 1340 * if data rate is already found. 1341 * Data rate IE should come before 1342 * extended supported rate IE 1343 */ 1344 if (found_data_rate_ie) { 1345 if ((element_len + rate_size) > 1346 MWIFIEX_SUPPORTED_RATES) 1347 bytes_to_copy = 1348 (MWIFIEX_SUPPORTED_RATES - 1349 rate_size); 1350 else 1351 bytes_to_copy = element_len; 1352 1353 rate = (u8 *) bss_entry->data_rates; 1354 rate += rate_size; 1355 memcpy(rate, current_ptr + 2, bytes_to_copy); 1356 1357 rate = (u8 *) bss_entry->supported_rates; 1358 rate += rate_size; 1359 memcpy(rate, current_ptr + 2, bytes_to_copy); 1360 } 1361 break; 1362 1363 case WLAN_EID_VENDOR_SPECIFIC: 1364 vendor_ie = (struct ieee_types_vendor_specific *) 1365 current_ptr; 1366 1367 /* 802.11 requires at least 3-byte OUI. */ 1368 if (element_len < sizeof(vendor_ie->vend_hdr.oui.oui)) 1369 return -EINVAL; 1370 1371 /* Not long enough for a match? Skip it. */ 1372 if (element_len < sizeof(wpa_oui)) 1373 break; 1374 1375 if (!memcmp(&vendor_ie->vend_hdr.oui, wpa_oui, 1376 sizeof(wpa_oui))) { 1377 bss_entry->bcn_wpa_ie = 1378 (struct ieee_types_vendor_specific *) 1379 current_ptr; 1380 bss_entry->wpa_offset = (u16) 1381 (current_ptr - bss_entry->beacon_buf); 1382 } else if (!memcmp(&vendor_ie->vend_hdr.oui, wmm_oui, 1383 sizeof(wmm_oui))) { 1384 if (total_ie_len == 1385 sizeof(struct ieee_types_wmm_parameter) || 1386 total_ie_len == 1387 sizeof(struct ieee_types_wmm_info)) 1388 /* 1389 * Only accept and copy the WMM IE if 1390 * it matches the size expected for the 1391 * WMM Info IE or the WMM Parameter IE. 1392 */ 1393 memcpy((u8 *) &bss_entry->wmm_ie, 1394 current_ptr, total_ie_len); 1395 } 1396 break; 1397 case WLAN_EID_RSN: 1398 bss_entry->bcn_rsn_ie = 1399 (struct ieee_types_generic *) current_ptr; 1400 bss_entry->rsn_offset = (u16) (current_ptr - 1401 bss_entry->beacon_buf); 1402 break; 1403 case WLAN_EID_BSS_AC_ACCESS_DELAY: 1404 bss_entry->bcn_wapi_ie = 1405 (struct ieee_types_generic *) current_ptr; 1406 bss_entry->wapi_offset = (u16) (current_ptr - 1407 bss_entry->beacon_buf); 1408 break; 1409 case WLAN_EID_HT_CAPABILITY: 1410 bss_entry->bcn_ht_cap = (struct ieee80211_ht_cap *) 1411 (current_ptr + 1412 sizeof(struct ieee_types_header)); 1413 bss_entry->ht_cap_offset = (u16) (current_ptr + 1414 sizeof(struct ieee_types_header) - 1415 bss_entry->beacon_buf); 1416 break; 1417 case WLAN_EID_HT_OPERATION: 1418 bss_entry->bcn_ht_oper = 1419 (struct ieee80211_ht_operation *)(current_ptr + 1420 sizeof(struct ieee_types_header)); 1421 bss_entry->ht_info_offset = (u16) (current_ptr + 1422 sizeof(struct ieee_types_header) - 1423 bss_entry->beacon_buf); 1424 break; 1425 case WLAN_EID_VHT_CAPABILITY: 1426 bss_entry->disable_11ac = false; 1427 bss_entry->bcn_vht_cap = 1428 (void *)(current_ptr + 1429 sizeof(struct ieee_types_header)); 1430 bss_entry->vht_cap_offset = 1431 (u16)((u8 *)bss_entry->bcn_vht_cap - 1432 bss_entry->beacon_buf); 1433 break; 1434 case WLAN_EID_VHT_OPERATION: 1435 bss_entry->bcn_vht_oper = 1436 (void *)(current_ptr + 1437 sizeof(struct ieee_types_header)); 1438 bss_entry->vht_info_offset = 1439 (u16)((u8 *)bss_entry->bcn_vht_oper - 1440 bss_entry->beacon_buf); 1441 break; 1442 case WLAN_EID_BSS_COEX_2040: 1443 bss_entry->bcn_bss_co_2040 = current_ptr; 1444 bss_entry->bss_co_2040_offset = 1445 (u16) (current_ptr - bss_entry->beacon_buf); 1446 break; 1447 case WLAN_EID_EXT_CAPABILITY: 1448 bss_entry->bcn_ext_cap = current_ptr; 1449 bss_entry->ext_cap_offset = 1450 (u16) (current_ptr - bss_entry->beacon_buf); 1451 break; 1452 case WLAN_EID_OPMODE_NOTIF: 1453 bss_entry->oper_mode = (void *)current_ptr; 1454 bss_entry->oper_mode_offset = 1455 (u16)((u8 *)bss_entry->oper_mode - 1456 bss_entry->beacon_buf); 1457 break; 1458 default: 1459 break; 1460 } 1461 1462 current_ptr += total_ie_len; 1463 bytes_left -= total_ie_len; 1464 1465 } /* while (bytes_left > 2) */ 1466 return 0; 1467 } 1468 1469 /* 1470 * This function converts radio type scan parameter to a band configuration 1471 * to be used in join command. 1472 */ 1473 static u8 1474 mwifiex_radio_type_to_band(u8 radio_type) 1475 { 1476 switch (radio_type) { 1477 case HostCmd_SCAN_RADIO_TYPE_A: 1478 return BAND_A; 1479 case HostCmd_SCAN_RADIO_TYPE_BG: 1480 default: 1481 return BAND_G; 1482 } 1483 } 1484 1485 /* 1486 * This is an internal function used to start a scan based on an input 1487 * configuration. 1488 * 1489 * This uses the input user scan configuration information when provided in 1490 * order to send the appropriate scan commands to firmware to populate or 1491 * update the internal driver scan table. 1492 */ 1493 int mwifiex_scan_networks(struct mwifiex_private *priv, 1494 const struct mwifiex_user_scan_cfg *user_scan_in) 1495 { 1496 int ret; 1497 struct mwifiex_adapter *adapter = priv->adapter; 1498 struct cmd_ctrl_node *cmd_node; 1499 union mwifiex_scan_cmd_config_tlv *scan_cfg_out; 1500 struct mwifiex_ie_types_chan_list_param_set *chan_list_out; 1501 struct mwifiex_chan_scan_param_set *scan_chan_list; 1502 u8 filtered_scan; 1503 u8 scan_current_chan_only; 1504 u8 max_chan_per_scan; 1505 1506 if (adapter->scan_processing) { 1507 mwifiex_dbg(adapter, WARN, 1508 "cmd: Scan already in process...\n"); 1509 return -EBUSY; 1510 } 1511 1512 if (priv->scan_block) { 1513 mwifiex_dbg(adapter, WARN, 1514 "cmd: Scan is blocked during association...\n"); 1515 return -EBUSY; 1516 } 1517 1518 if (test_bit(MWIFIEX_SURPRISE_REMOVED, &adapter->work_flags) || 1519 test_bit(MWIFIEX_IS_CMD_TIMEDOUT, &adapter->work_flags)) { 1520 mwifiex_dbg(adapter, ERROR, 1521 "Ignore scan. Card removed or firmware in bad state\n"); 1522 return -EFAULT; 1523 } 1524 1525 spin_lock_bh(&adapter->mwifiex_cmd_lock); 1526 adapter->scan_processing = true; 1527 spin_unlock_bh(&adapter->mwifiex_cmd_lock); 1528 1529 scan_cfg_out = kzalloc(sizeof(union mwifiex_scan_cmd_config_tlv), 1530 GFP_KERNEL); 1531 if (!scan_cfg_out) { 1532 ret = -ENOMEM; 1533 goto done; 1534 } 1535 1536 scan_chan_list = kcalloc(MWIFIEX_USER_SCAN_CHAN_MAX, 1537 sizeof(struct mwifiex_chan_scan_param_set), 1538 GFP_KERNEL); 1539 if (!scan_chan_list) { 1540 kfree(scan_cfg_out); 1541 ret = -ENOMEM; 1542 goto done; 1543 } 1544 1545 mwifiex_config_scan(priv, user_scan_in, &scan_cfg_out->config, 1546 &chan_list_out, scan_chan_list, &max_chan_per_scan, 1547 &filtered_scan, &scan_current_chan_only); 1548 1549 ret = mwifiex_scan_channel_list(priv, max_chan_per_scan, filtered_scan, 1550 &scan_cfg_out->config, chan_list_out, 1551 scan_chan_list); 1552 1553 /* Get scan command from scan_pending_q and put to cmd_pending_q */ 1554 if (!ret) { 1555 spin_lock_bh(&adapter->scan_pending_q_lock); 1556 if (!list_empty(&adapter->scan_pending_q)) { 1557 cmd_node = list_first_entry(&adapter->scan_pending_q, 1558 struct cmd_ctrl_node, list); 1559 list_del(&cmd_node->list); 1560 spin_unlock_bh(&adapter->scan_pending_q_lock); 1561 mwifiex_insert_cmd_to_pending_q(adapter, cmd_node); 1562 queue_work(adapter->workqueue, &adapter->main_work); 1563 1564 /* Perform internal scan synchronously */ 1565 if (!priv->scan_request) { 1566 mwifiex_dbg(adapter, INFO, 1567 "wait internal scan\n"); 1568 mwifiex_wait_queue_complete(adapter, cmd_node); 1569 } 1570 } else { 1571 spin_unlock_bh(&adapter->scan_pending_q_lock); 1572 } 1573 } 1574 1575 kfree(scan_cfg_out); 1576 kfree(scan_chan_list); 1577 done: 1578 if (ret) { 1579 spin_lock_bh(&adapter->mwifiex_cmd_lock); 1580 adapter->scan_processing = false; 1581 spin_unlock_bh(&adapter->mwifiex_cmd_lock); 1582 } 1583 return ret; 1584 } 1585 1586 /* 1587 * This function prepares a scan command to be sent to the firmware. 1588 * 1589 * This uses the scan command configuration sent to the command processing 1590 * module in command preparation stage to configure a scan command structure 1591 * to send to firmware. 1592 * 1593 * The fixed fields specifying the BSS type and BSSID filters as well as a 1594 * variable number/length of TLVs are sent in the command to firmware. 1595 * 1596 * Preparation also includes - 1597 * - Setting command ID, and proper size 1598 * - Ensuring correct endian-ness 1599 */ 1600 int mwifiex_cmd_802_11_scan(struct host_cmd_ds_command *cmd, 1601 struct mwifiex_scan_cmd_config *scan_cfg) 1602 { 1603 struct host_cmd_ds_802_11_scan *scan_cmd = &cmd->params.scan; 1604 1605 /* Set fixed field variables in scan command */ 1606 scan_cmd->bss_mode = scan_cfg->bss_mode; 1607 memcpy(scan_cmd->bssid, scan_cfg->specific_bssid, 1608 sizeof(scan_cmd->bssid)); 1609 memcpy(scan_cmd->tlv_buffer, scan_cfg->tlv_buf, scan_cfg->tlv_buf_len); 1610 1611 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_SCAN); 1612 1613 /* Size is equal to the sizeof(fixed portions) + the TLV len + header */ 1614 cmd->size = cpu_to_le16((u16) (sizeof(scan_cmd->bss_mode) 1615 + sizeof(scan_cmd->bssid) 1616 + scan_cfg->tlv_buf_len + S_DS_GEN)); 1617 1618 return 0; 1619 } 1620 1621 /* 1622 * This function checks compatibility of requested network with current 1623 * driver settings. 1624 */ 1625 int mwifiex_check_network_compatibility(struct mwifiex_private *priv, 1626 struct mwifiex_bssdescriptor *bss_desc) 1627 { 1628 int ret = -1; 1629 1630 if (!bss_desc) 1631 return -1; 1632 1633 if ((mwifiex_get_cfp(priv, (u8) bss_desc->bss_band, 1634 (u16) bss_desc->channel, 0))) { 1635 switch (priv->bss_mode) { 1636 case NL80211_IFTYPE_STATION: 1637 case NL80211_IFTYPE_ADHOC: 1638 ret = mwifiex_is_network_compatible(priv, bss_desc, 1639 priv->bss_mode); 1640 if (ret) 1641 mwifiex_dbg(priv->adapter, ERROR, 1642 "Incompatible network settings\n"); 1643 break; 1644 default: 1645 ret = 0; 1646 } 1647 } 1648 1649 return ret; 1650 } 1651 1652 /* This function checks if SSID string contains all zeroes or length is zero */ 1653 static bool mwifiex_is_hidden_ssid(struct cfg80211_ssid *ssid) 1654 { 1655 int idx; 1656 1657 for (idx = 0; idx < ssid->ssid_len; idx++) { 1658 if (ssid->ssid[idx]) 1659 return false; 1660 } 1661 1662 return true; 1663 } 1664 1665 /* This function checks if any hidden SSID found in passive scan channels 1666 * and save those channels for specific SSID active scan 1667 */ 1668 static int mwifiex_save_hidden_ssid_channels(struct mwifiex_private *priv, 1669 struct cfg80211_bss *bss) 1670 { 1671 struct mwifiex_bssdescriptor *bss_desc; 1672 int ret; 1673 int chid; 1674 1675 /* Allocate and fill new bss descriptor */ 1676 bss_desc = kzalloc(sizeof(*bss_desc), GFP_KERNEL); 1677 if (!bss_desc) 1678 return -ENOMEM; 1679 1680 ret = mwifiex_fill_new_bss_desc(priv, bss, bss_desc); 1681 if (ret) 1682 goto done; 1683 1684 if (mwifiex_is_hidden_ssid(&bss_desc->ssid)) { 1685 mwifiex_dbg(priv->adapter, INFO, "found hidden SSID\n"); 1686 for (chid = 0 ; chid < MWIFIEX_USER_SCAN_CHAN_MAX; chid++) { 1687 if (priv->hidden_chan[chid].chan_number == 1688 bss->channel->hw_value) 1689 break; 1690 1691 if (!priv->hidden_chan[chid].chan_number) { 1692 priv->hidden_chan[chid].chan_number = 1693 bss->channel->hw_value; 1694 priv->hidden_chan[chid].radio_type = 1695 bss->channel->band; 1696 priv->hidden_chan[chid].scan_type = 1697 MWIFIEX_SCAN_TYPE_ACTIVE; 1698 break; 1699 } 1700 } 1701 } 1702 1703 done: 1704 /* beacon_ie buffer was allocated in function 1705 * mwifiex_fill_new_bss_desc(). Free it now. 1706 */ 1707 kfree(bss_desc->beacon_buf); 1708 kfree(bss_desc); 1709 return 0; 1710 } 1711 1712 static int mwifiex_update_curr_bss_params(struct mwifiex_private *priv, 1713 struct cfg80211_bss *bss) 1714 { 1715 struct mwifiex_bssdescriptor *bss_desc; 1716 int ret; 1717 1718 /* Allocate and fill new bss descriptor */ 1719 bss_desc = kzalloc(sizeof(struct mwifiex_bssdescriptor), GFP_KERNEL); 1720 if (!bss_desc) 1721 return -ENOMEM; 1722 1723 ret = mwifiex_fill_new_bss_desc(priv, bss, bss_desc); 1724 if (ret) 1725 goto done; 1726 1727 ret = mwifiex_check_network_compatibility(priv, bss_desc); 1728 if (ret) 1729 goto done; 1730 1731 spin_lock_bh(&priv->curr_bcn_buf_lock); 1732 /* Make a copy of current BSSID descriptor */ 1733 memcpy(&priv->curr_bss_params.bss_descriptor, bss_desc, 1734 sizeof(priv->curr_bss_params.bss_descriptor)); 1735 1736 /* The contents of beacon_ie will be copied to its own buffer 1737 * in mwifiex_save_curr_bcn() 1738 */ 1739 mwifiex_save_curr_bcn(priv); 1740 spin_unlock_bh(&priv->curr_bcn_buf_lock); 1741 1742 done: 1743 /* beacon_ie buffer was allocated in function 1744 * mwifiex_fill_new_bss_desc(). Free it now. 1745 */ 1746 kfree(bss_desc->beacon_buf); 1747 kfree(bss_desc); 1748 return 0; 1749 } 1750 1751 static int 1752 mwifiex_parse_single_response_buf(struct mwifiex_private *priv, u8 **bss_info, 1753 u32 *bytes_left, u64 fw_tsf, u8 *radio_type, 1754 bool ext_scan, s32 rssi_val) 1755 { 1756 struct mwifiex_adapter *adapter = priv->adapter; 1757 struct mwifiex_chan_freq_power *cfp; 1758 struct cfg80211_bss *bss; 1759 u8 bssid[ETH_ALEN]; 1760 s32 rssi; 1761 const u8 *ie_buf; 1762 size_t ie_len; 1763 u16 channel = 0; 1764 u16 beacon_size = 0; 1765 u32 curr_bcn_bytes; 1766 u32 freq; 1767 u16 beacon_period; 1768 u16 cap_info_bitmap; 1769 u8 *current_ptr; 1770 u64 timestamp; 1771 struct mwifiex_fixed_bcn_param *bcn_param; 1772 struct mwifiex_bss_priv *bss_priv; 1773 1774 if (*bytes_left >= sizeof(beacon_size)) { 1775 /* Extract & convert beacon size from command buffer */ 1776 beacon_size = get_unaligned_le16((*bss_info)); 1777 *bytes_left -= sizeof(beacon_size); 1778 *bss_info += sizeof(beacon_size); 1779 } 1780 1781 if (!beacon_size || beacon_size > *bytes_left) { 1782 *bss_info += *bytes_left; 1783 *bytes_left = 0; 1784 return -EFAULT; 1785 } 1786 1787 /* Initialize the current working beacon pointer for this BSS 1788 * iteration 1789 */ 1790 current_ptr = *bss_info; 1791 1792 /* Advance the return beacon pointer past the current beacon */ 1793 *bss_info += beacon_size; 1794 *bytes_left -= beacon_size; 1795 1796 curr_bcn_bytes = beacon_size; 1797 1798 /* First 5 fields are bssid, RSSI(for legacy scan only), 1799 * time stamp, beacon interval, and capability information 1800 */ 1801 if (curr_bcn_bytes < ETH_ALEN + sizeof(u8) + 1802 sizeof(struct mwifiex_fixed_bcn_param)) { 1803 mwifiex_dbg(adapter, ERROR, 1804 "InterpretIE: not enough bytes left\n"); 1805 return -EFAULT; 1806 } 1807 1808 memcpy(bssid, current_ptr, ETH_ALEN); 1809 current_ptr += ETH_ALEN; 1810 curr_bcn_bytes -= ETH_ALEN; 1811 1812 if (!ext_scan) { 1813 rssi = (s32) *current_ptr; 1814 rssi = (-rssi) * 100; /* Convert dBm to mBm */ 1815 current_ptr += sizeof(u8); 1816 curr_bcn_bytes -= sizeof(u8); 1817 mwifiex_dbg(adapter, INFO, 1818 "info: InterpretIE: RSSI=%d\n", rssi); 1819 } else { 1820 rssi = rssi_val; 1821 } 1822 1823 bcn_param = (struct mwifiex_fixed_bcn_param *)current_ptr; 1824 current_ptr += sizeof(*bcn_param); 1825 curr_bcn_bytes -= sizeof(*bcn_param); 1826 1827 timestamp = le64_to_cpu(bcn_param->timestamp); 1828 beacon_period = le16_to_cpu(bcn_param->beacon_period); 1829 1830 cap_info_bitmap = le16_to_cpu(bcn_param->cap_info_bitmap); 1831 mwifiex_dbg(adapter, INFO, 1832 "info: InterpretIE: capabilities=0x%X\n", 1833 cap_info_bitmap); 1834 1835 /* Rest of the current buffer are IE's */ 1836 ie_buf = current_ptr; 1837 ie_len = curr_bcn_bytes; 1838 mwifiex_dbg(adapter, INFO, 1839 "info: InterpretIE: IELength for this AP = %d\n", 1840 curr_bcn_bytes); 1841 1842 while (curr_bcn_bytes >= sizeof(struct ieee_types_header)) { 1843 u8 element_id, element_len; 1844 1845 element_id = *current_ptr; 1846 element_len = *(current_ptr + 1); 1847 if (curr_bcn_bytes < element_len + 1848 sizeof(struct ieee_types_header)) { 1849 mwifiex_dbg(adapter, ERROR, 1850 "%s: bytes left < IE length\n", __func__); 1851 return -EFAULT; 1852 } 1853 if (element_id == WLAN_EID_DS_PARAMS) { 1854 channel = *(current_ptr + 1855 sizeof(struct ieee_types_header)); 1856 break; 1857 } 1858 1859 current_ptr += element_len + sizeof(struct ieee_types_header); 1860 curr_bcn_bytes -= element_len + 1861 sizeof(struct ieee_types_header); 1862 } 1863 1864 if (channel) { 1865 struct ieee80211_channel *chan; 1866 u8 band; 1867 1868 /* Skip entry if on csa closed channel */ 1869 if (channel == priv->csa_chan) { 1870 mwifiex_dbg(adapter, WARN, 1871 "Dropping entry on csa closed channel\n"); 1872 return 0; 1873 } 1874 1875 band = BAND_G; 1876 if (radio_type) 1877 band = mwifiex_radio_type_to_band(*radio_type & 1878 (BIT(0) | BIT(1))); 1879 1880 cfp = mwifiex_get_cfp(priv, band, channel, 0); 1881 1882 freq = cfp ? cfp->freq : 0; 1883 1884 chan = ieee80211_get_channel(priv->wdev.wiphy, freq); 1885 1886 if (chan && !(chan->flags & IEEE80211_CHAN_DISABLED)) { 1887 bss = cfg80211_inform_bss(priv->wdev.wiphy, 1888 chan, CFG80211_BSS_FTYPE_UNKNOWN, 1889 bssid, timestamp, 1890 cap_info_bitmap, beacon_period, 1891 ie_buf, ie_len, rssi, GFP_ATOMIC); 1892 if (bss) { 1893 bss_priv = (struct mwifiex_bss_priv *)bss->priv; 1894 bss_priv->band = band; 1895 bss_priv->fw_tsf = fw_tsf; 1896 if (priv->media_connected && 1897 !memcmp(bssid, priv->curr_bss_params. 1898 bss_descriptor.mac_address, 1899 ETH_ALEN)) 1900 mwifiex_update_curr_bss_params(priv, 1901 bss); 1902 1903 if ((chan->flags & IEEE80211_CHAN_RADAR) || 1904 (chan->flags & IEEE80211_CHAN_NO_IR)) { 1905 mwifiex_dbg(adapter, INFO, 1906 "radar or passive channel %d\n", 1907 channel); 1908 mwifiex_save_hidden_ssid_channels(priv, 1909 bss); 1910 } 1911 1912 cfg80211_put_bss(priv->wdev.wiphy, bss); 1913 } 1914 } 1915 } else { 1916 mwifiex_dbg(adapter, WARN, "missing BSS channel IE\n"); 1917 } 1918 1919 return 0; 1920 } 1921 1922 static void mwifiex_complete_scan(struct mwifiex_private *priv) 1923 { 1924 struct mwifiex_adapter *adapter = priv->adapter; 1925 1926 adapter->survey_idx = 0; 1927 if (adapter->curr_cmd->wait_q_enabled) { 1928 adapter->cmd_wait_q.status = 0; 1929 if (!priv->scan_request) { 1930 mwifiex_dbg(adapter, INFO, 1931 "complete internal scan\n"); 1932 mwifiex_complete_cmd(adapter, adapter->curr_cmd); 1933 } 1934 } 1935 } 1936 1937 /* This function checks if any hidden SSID found in passive scan channels 1938 * and do specific SSID active scan for those channels 1939 */ 1940 static int 1941 mwifiex_active_scan_req_for_passive_chan(struct mwifiex_private *priv) 1942 { 1943 int ret; 1944 struct mwifiex_adapter *adapter = priv->adapter; 1945 u8 id = 0; 1946 struct mwifiex_user_scan_cfg *user_scan_cfg; 1947 1948 if (adapter->active_scan_triggered || !priv->scan_request || 1949 priv->scan_aborting) { 1950 adapter->active_scan_triggered = false; 1951 return 0; 1952 } 1953 1954 if (!priv->hidden_chan[0].chan_number) { 1955 mwifiex_dbg(adapter, INFO, "No BSS with hidden SSID found on DFS channels\n"); 1956 return 0; 1957 } 1958 user_scan_cfg = kzalloc(sizeof(*user_scan_cfg), GFP_KERNEL); 1959 1960 if (!user_scan_cfg) 1961 return -ENOMEM; 1962 1963 for (id = 0; id < MWIFIEX_USER_SCAN_CHAN_MAX; id++) { 1964 if (!priv->hidden_chan[id].chan_number) 1965 break; 1966 memcpy(&user_scan_cfg->chan_list[id], 1967 &priv->hidden_chan[id], 1968 sizeof(struct mwifiex_user_scan_chan)); 1969 } 1970 1971 adapter->active_scan_triggered = true; 1972 if (priv->scan_request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) 1973 ether_addr_copy(user_scan_cfg->random_mac, 1974 priv->scan_request->mac_addr); 1975 user_scan_cfg->num_ssids = priv->scan_request->n_ssids; 1976 user_scan_cfg->ssid_list = priv->scan_request->ssids; 1977 1978 ret = mwifiex_scan_networks(priv, user_scan_cfg); 1979 kfree(user_scan_cfg); 1980 1981 memset(&priv->hidden_chan, 0, sizeof(priv->hidden_chan)); 1982 1983 if (ret) { 1984 dev_err(priv->adapter->dev, "scan failed: %d\n", ret); 1985 return ret; 1986 } 1987 1988 return 0; 1989 } 1990 static void mwifiex_check_next_scan_command(struct mwifiex_private *priv) 1991 { 1992 struct mwifiex_adapter *adapter = priv->adapter; 1993 struct cmd_ctrl_node *cmd_node; 1994 1995 spin_lock_bh(&adapter->scan_pending_q_lock); 1996 if (list_empty(&adapter->scan_pending_q)) { 1997 spin_unlock_bh(&adapter->scan_pending_q_lock); 1998 1999 spin_lock_bh(&adapter->mwifiex_cmd_lock); 2000 adapter->scan_processing = false; 2001 spin_unlock_bh(&adapter->mwifiex_cmd_lock); 2002 2003 mwifiex_active_scan_req_for_passive_chan(priv); 2004 2005 if (!adapter->ext_scan) 2006 mwifiex_complete_scan(priv); 2007 2008 if (priv->scan_request) { 2009 struct cfg80211_scan_info info = { 2010 .aborted = false, 2011 }; 2012 2013 mwifiex_dbg(adapter, INFO, 2014 "info: notifying scan done\n"); 2015 cfg80211_scan_done(priv->scan_request, &info); 2016 priv->scan_request = NULL; 2017 priv->scan_aborting = false; 2018 } else { 2019 priv->scan_aborting = false; 2020 mwifiex_dbg(adapter, INFO, 2021 "info: scan already aborted\n"); 2022 } 2023 } else if ((priv->scan_aborting && !priv->scan_request) || 2024 priv->scan_block) { 2025 spin_unlock_bh(&adapter->scan_pending_q_lock); 2026 2027 mwifiex_cancel_pending_scan_cmd(adapter); 2028 2029 spin_lock_bh(&adapter->mwifiex_cmd_lock); 2030 adapter->scan_processing = false; 2031 spin_unlock_bh(&adapter->mwifiex_cmd_lock); 2032 2033 if (!adapter->active_scan_triggered) { 2034 if (priv->scan_request) { 2035 struct cfg80211_scan_info info = { 2036 .aborted = true, 2037 }; 2038 2039 mwifiex_dbg(adapter, INFO, 2040 "info: aborting scan\n"); 2041 cfg80211_scan_done(priv->scan_request, &info); 2042 priv->scan_request = NULL; 2043 priv->scan_aborting = false; 2044 } else { 2045 priv->scan_aborting = false; 2046 mwifiex_dbg(adapter, INFO, 2047 "info: scan already aborted\n"); 2048 } 2049 } 2050 } else { 2051 /* Get scan command from scan_pending_q and put to 2052 * cmd_pending_q 2053 */ 2054 cmd_node = list_first_entry(&adapter->scan_pending_q, 2055 struct cmd_ctrl_node, list); 2056 list_del(&cmd_node->list); 2057 spin_unlock_bh(&adapter->scan_pending_q_lock); 2058 mwifiex_insert_cmd_to_pending_q(adapter, cmd_node); 2059 } 2060 2061 return; 2062 } 2063 2064 void mwifiex_cancel_scan(struct mwifiex_adapter *adapter) 2065 { 2066 struct mwifiex_private *priv; 2067 int i; 2068 2069 mwifiex_cancel_pending_scan_cmd(adapter); 2070 2071 if (adapter->scan_processing) { 2072 spin_lock_bh(&adapter->mwifiex_cmd_lock); 2073 adapter->scan_processing = false; 2074 spin_unlock_bh(&adapter->mwifiex_cmd_lock); 2075 for (i = 0; i < adapter->priv_num; i++) { 2076 priv = adapter->priv[i]; 2077 if (!priv) 2078 continue; 2079 if (priv->scan_request) { 2080 struct cfg80211_scan_info info = { 2081 .aborted = true, 2082 }; 2083 2084 mwifiex_dbg(adapter, INFO, 2085 "info: aborting scan\n"); 2086 cfg80211_scan_done(priv->scan_request, &info); 2087 priv->scan_request = NULL; 2088 priv->scan_aborting = false; 2089 } 2090 } 2091 } 2092 } 2093 2094 /* 2095 * This function handles the command response of scan. 2096 * 2097 * The response buffer for the scan command has the following 2098 * memory layout: 2099 * 2100 * .-------------------------------------------------------------. 2101 * | Header (4 * sizeof(t_u16)): Standard command response hdr | 2102 * .-------------------------------------------------------------. 2103 * | BufSize (t_u16) : sizeof the BSS Description data | 2104 * .-------------------------------------------------------------. 2105 * | NumOfSet (t_u8) : Number of BSS Descs returned | 2106 * .-------------------------------------------------------------. 2107 * | BSSDescription data (variable, size given in BufSize) | 2108 * .-------------------------------------------------------------. 2109 * | TLV data (variable, size calculated using Header->Size, | 2110 * | BufSize and sizeof the fixed fields above) | 2111 * .-------------------------------------------------------------. 2112 */ 2113 int mwifiex_ret_802_11_scan(struct mwifiex_private *priv, 2114 struct host_cmd_ds_command *resp) 2115 { 2116 int ret = 0; 2117 struct mwifiex_adapter *adapter = priv->adapter; 2118 struct host_cmd_ds_802_11_scan_rsp *scan_rsp; 2119 struct mwifiex_ie_types_data *tlv_data; 2120 struct mwifiex_ie_types_tsf_timestamp *tsf_tlv; 2121 u8 *bss_info; 2122 u32 scan_resp_size; 2123 u32 bytes_left; 2124 u32 idx; 2125 u32 tlv_buf_size; 2126 struct mwifiex_ie_types_chan_band_list_param_set *chan_band_tlv; 2127 struct chan_band_param_set *chan_band; 2128 u8 is_bgscan_resp; 2129 __le64 fw_tsf = 0; 2130 u8 *radio_type; 2131 struct cfg80211_wowlan_nd_match *pmatch; 2132 struct cfg80211_sched_scan_request *nd_config = NULL; 2133 2134 is_bgscan_resp = (le16_to_cpu(resp->command) 2135 == HostCmd_CMD_802_11_BG_SCAN_QUERY); 2136 if (is_bgscan_resp) 2137 scan_rsp = &resp->params.bg_scan_query_resp.scan_resp; 2138 else 2139 scan_rsp = &resp->params.scan_resp; 2140 2141 2142 if (scan_rsp->number_of_sets > MWIFIEX_MAX_AP) { 2143 mwifiex_dbg(adapter, ERROR, 2144 "SCAN_RESP: too many AP returned (%d)\n", 2145 scan_rsp->number_of_sets); 2146 ret = -1; 2147 goto check_next_scan; 2148 } 2149 2150 /* Check csa channel expiry before parsing scan response */ 2151 mwifiex_11h_get_csa_closed_channel(priv); 2152 2153 bytes_left = le16_to_cpu(scan_rsp->bss_descript_size); 2154 mwifiex_dbg(adapter, INFO, 2155 "info: SCAN_RESP: bss_descript_size %d\n", 2156 bytes_left); 2157 2158 scan_resp_size = le16_to_cpu(resp->size); 2159 2160 mwifiex_dbg(adapter, INFO, 2161 "info: SCAN_RESP: returned %d APs before parsing\n", 2162 scan_rsp->number_of_sets); 2163 2164 bss_info = scan_rsp->bss_desc_and_tlv_buffer; 2165 2166 /* 2167 * The size of the TLV buffer is equal to the entire command response 2168 * size (scan_resp_size) minus the fixed fields (sizeof()'s), the 2169 * BSS Descriptions (bss_descript_size as bytesLef) and the command 2170 * response header (S_DS_GEN) 2171 */ 2172 tlv_buf_size = scan_resp_size - (bytes_left 2173 + sizeof(scan_rsp->bss_descript_size) 2174 + sizeof(scan_rsp->number_of_sets) 2175 + S_DS_GEN); 2176 2177 tlv_data = (struct mwifiex_ie_types_data *) (scan_rsp-> 2178 bss_desc_and_tlv_buffer + 2179 bytes_left); 2180 2181 /* Search the TLV buffer space in the scan response for any valid 2182 TLVs */ 2183 mwifiex_ret_802_11_scan_get_tlv_ptrs(adapter, tlv_data, tlv_buf_size, 2184 TLV_TYPE_TSFTIMESTAMP, 2185 (struct mwifiex_ie_types_data **) 2186 &tsf_tlv); 2187 2188 /* Search the TLV buffer space in the scan response for any valid 2189 TLVs */ 2190 mwifiex_ret_802_11_scan_get_tlv_ptrs(adapter, tlv_data, tlv_buf_size, 2191 TLV_TYPE_CHANNELBANDLIST, 2192 (struct mwifiex_ie_types_data **) 2193 &chan_band_tlv); 2194 2195 #ifdef CONFIG_PM 2196 if (priv->wdev.wiphy->wowlan_config) 2197 nd_config = priv->wdev.wiphy->wowlan_config->nd_config; 2198 #endif 2199 2200 if (nd_config) { 2201 adapter->nd_info = 2202 kzalloc(sizeof(struct cfg80211_wowlan_nd_match) + 2203 sizeof(struct cfg80211_wowlan_nd_match *) * 2204 scan_rsp->number_of_sets, GFP_ATOMIC); 2205 2206 if (adapter->nd_info) 2207 adapter->nd_info->n_matches = scan_rsp->number_of_sets; 2208 } 2209 2210 for (idx = 0; idx < scan_rsp->number_of_sets && bytes_left; idx++) { 2211 /* 2212 * If the TSF TLV was appended to the scan results, save this 2213 * entry's TSF value in the fw_tsf field. It is the firmware's 2214 * TSF value at the time the beacon or probe response was 2215 * received. 2216 */ 2217 if (tsf_tlv) 2218 memcpy(&fw_tsf, &tsf_tlv->tsf_data[idx * TSF_DATA_SIZE], 2219 sizeof(fw_tsf)); 2220 2221 if (chan_band_tlv) { 2222 chan_band = &chan_band_tlv->chan_band_param[idx]; 2223 radio_type = &chan_band->radio_type; 2224 } else { 2225 radio_type = NULL; 2226 } 2227 2228 if (chan_band_tlv && adapter->nd_info) { 2229 adapter->nd_info->matches[idx] = 2230 kzalloc(sizeof(*pmatch) + sizeof(u32), 2231 GFP_ATOMIC); 2232 2233 pmatch = adapter->nd_info->matches[idx]; 2234 2235 if (pmatch) { 2236 pmatch->n_channels = 1; 2237 pmatch->channels[0] = chan_band->chan_number; 2238 } 2239 } 2240 2241 ret = mwifiex_parse_single_response_buf(priv, &bss_info, 2242 &bytes_left, 2243 le64_to_cpu(fw_tsf), 2244 radio_type, false, 0); 2245 if (ret) 2246 goto check_next_scan; 2247 } 2248 2249 check_next_scan: 2250 mwifiex_check_next_scan_command(priv); 2251 return ret; 2252 } 2253 2254 /* 2255 * This function prepares an extended scan command to be sent to the firmware 2256 * 2257 * This uses the scan command configuration sent to the command processing 2258 * module in command preparation stage to configure a extended scan command 2259 * structure to send to firmware. 2260 */ 2261 int mwifiex_cmd_802_11_scan_ext(struct mwifiex_private *priv, 2262 struct host_cmd_ds_command *cmd, 2263 void *data_buf) 2264 { 2265 struct host_cmd_ds_802_11_scan_ext *ext_scan = &cmd->params.ext_scan; 2266 struct mwifiex_scan_cmd_config *scan_cfg = data_buf; 2267 2268 memcpy(ext_scan->tlv_buffer, scan_cfg->tlv_buf, scan_cfg->tlv_buf_len); 2269 2270 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_SCAN_EXT); 2271 2272 /* Size is equal to the sizeof(fixed portions) + the TLV len + header */ 2273 cmd->size = cpu_to_le16((u16)(sizeof(ext_scan->reserved) 2274 + scan_cfg->tlv_buf_len + S_DS_GEN)); 2275 2276 return 0; 2277 } 2278 2279 /* This function prepares an background scan config command to be sent 2280 * to the firmware 2281 */ 2282 int mwifiex_cmd_802_11_bg_scan_config(struct mwifiex_private *priv, 2283 struct host_cmd_ds_command *cmd, 2284 void *data_buf) 2285 { 2286 struct host_cmd_ds_802_11_bg_scan_config *bgscan_config = 2287 &cmd->params.bg_scan_config; 2288 struct mwifiex_bg_scan_cfg *bgscan_cfg_in = data_buf; 2289 u8 *tlv_pos = bgscan_config->tlv; 2290 u8 num_probes; 2291 u32 ssid_len, chan_idx, scan_type, scan_dur, chan_num; 2292 int i; 2293 struct mwifiex_ie_types_num_probes *num_probes_tlv; 2294 struct mwifiex_ie_types_repeat_count *repeat_count_tlv; 2295 struct mwifiex_ie_types_min_rssi_threshold *rssi_threshold_tlv; 2296 struct mwifiex_ie_types_bgscan_start_later *start_later_tlv; 2297 struct mwifiex_ie_types_wildcard_ssid_params *wildcard_ssid_tlv; 2298 struct mwifiex_ie_types_chan_list_param_set *chan_list_tlv; 2299 struct mwifiex_chan_scan_param_set *temp_chan; 2300 2301 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_BG_SCAN_CONFIG); 2302 cmd->size = cpu_to_le16(sizeof(*bgscan_config) + S_DS_GEN); 2303 2304 bgscan_config->action = cpu_to_le16(bgscan_cfg_in->action); 2305 bgscan_config->enable = bgscan_cfg_in->enable; 2306 bgscan_config->bss_type = bgscan_cfg_in->bss_type; 2307 bgscan_config->scan_interval = 2308 cpu_to_le32(bgscan_cfg_in->scan_interval); 2309 bgscan_config->report_condition = 2310 cpu_to_le32(bgscan_cfg_in->report_condition); 2311 2312 /* stop sched scan */ 2313 if (!bgscan_config->enable) 2314 return 0; 2315 2316 bgscan_config->chan_per_scan = bgscan_cfg_in->chan_per_scan; 2317 2318 num_probes = (bgscan_cfg_in->num_probes ? bgscan_cfg_in-> 2319 num_probes : priv->adapter->scan_probes); 2320 2321 if (num_probes) { 2322 num_probes_tlv = (struct mwifiex_ie_types_num_probes *)tlv_pos; 2323 num_probes_tlv->header.type = cpu_to_le16(TLV_TYPE_NUMPROBES); 2324 num_probes_tlv->header.len = 2325 cpu_to_le16(sizeof(num_probes_tlv->num_probes)); 2326 num_probes_tlv->num_probes = cpu_to_le16((u16)num_probes); 2327 2328 tlv_pos += sizeof(num_probes_tlv->header) + 2329 le16_to_cpu(num_probes_tlv->header.len); 2330 } 2331 2332 if (bgscan_cfg_in->repeat_count) { 2333 repeat_count_tlv = 2334 (struct mwifiex_ie_types_repeat_count *)tlv_pos; 2335 repeat_count_tlv->header.type = 2336 cpu_to_le16(TLV_TYPE_REPEAT_COUNT); 2337 repeat_count_tlv->header.len = 2338 cpu_to_le16(sizeof(repeat_count_tlv->repeat_count)); 2339 repeat_count_tlv->repeat_count = 2340 cpu_to_le16(bgscan_cfg_in->repeat_count); 2341 2342 tlv_pos += sizeof(repeat_count_tlv->header) + 2343 le16_to_cpu(repeat_count_tlv->header.len); 2344 } 2345 2346 if (bgscan_cfg_in->rssi_threshold) { 2347 rssi_threshold_tlv = 2348 (struct mwifiex_ie_types_min_rssi_threshold *)tlv_pos; 2349 rssi_threshold_tlv->header.type = 2350 cpu_to_le16(TLV_TYPE_RSSI_LOW); 2351 rssi_threshold_tlv->header.len = 2352 cpu_to_le16(sizeof(rssi_threshold_tlv->rssi_threshold)); 2353 rssi_threshold_tlv->rssi_threshold = 2354 cpu_to_le16(bgscan_cfg_in->rssi_threshold); 2355 2356 tlv_pos += sizeof(rssi_threshold_tlv->header) + 2357 le16_to_cpu(rssi_threshold_tlv->header.len); 2358 } 2359 2360 for (i = 0; i < bgscan_cfg_in->num_ssids; i++) { 2361 ssid_len = bgscan_cfg_in->ssid_list[i].ssid.ssid_len; 2362 2363 wildcard_ssid_tlv = 2364 (struct mwifiex_ie_types_wildcard_ssid_params *)tlv_pos; 2365 wildcard_ssid_tlv->header.type = 2366 cpu_to_le16(TLV_TYPE_WILDCARDSSID); 2367 wildcard_ssid_tlv->header.len = cpu_to_le16( 2368 (u16)(ssid_len + sizeof(wildcard_ssid_tlv-> 2369 max_ssid_length))); 2370 2371 /* max_ssid_length = 0 tells firmware to perform 2372 * specific scan for the SSID filled, whereas 2373 * max_ssid_length = IEEE80211_MAX_SSID_LEN is for 2374 * wildcard scan. 2375 */ 2376 if (ssid_len) 2377 wildcard_ssid_tlv->max_ssid_length = 0; 2378 else 2379 wildcard_ssid_tlv->max_ssid_length = 2380 IEEE80211_MAX_SSID_LEN; 2381 2382 memcpy(wildcard_ssid_tlv->ssid, 2383 bgscan_cfg_in->ssid_list[i].ssid.ssid, ssid_len); 2384 2385 tlv_pos += (sizeof(wildcard_ssid_tlv->header) 2386 + le16_to_cpu(wildcard_ssid_tlv->header.len)); 2387 } 2388 2389 chan_list_tlv = (struct mwifiex_ie_types_chan_list_param_set *)tlv_pos; 2390 2391 if (bgscan_cfg_in->chan_list[0].chan_number) { 2392 dev_dbg(priv->adapter->dev, "info: bgscan: Using supplied channel list\n"); 2393 2394 chan_list_tlv->header.type = cpu_to_le16(TLV_TYPE_CHANLIST); 2395 2396 for (chan_idx = 0; 2397 chan_idx < MWIFIEX_BG_SCAN_CHAN_MAX && 2398 bgscan_cfg_in->chan_list[chan_idx].chan_number; 2399 chan_idx++) { 2400 temp_chan = chan_list_tlv->chan_scan_param + chan_idx; 2401 2402 /* Increment the TLV header length by size appended */ 2403 le16_unaligned_add_cpu(&chan_list_tlv->header.len, 2404 sizeof( 2405 chan_list_tlv->chan_scan_param)); 2406 2407 temp_chan->chan_number = 2408 bgscan_cfg_in->chan_list[chan_idx].chan_number; 2409 temp_chan->radio_type = 2410 bgscan_cfg_in->chan_list[chan_idx].radio_type; 2411 2412 scan_type = 2413 bgscan_cfg_in->chan_list[chan_idx].scan_type; 2414 2415 if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE) 2416 temp_chan->chan_scan_mode_bitmap 2417 |= MWIFIEX_PASSIVE_SCAN; 2418 else 2419 temp_chan->chan_scan_mode_bitmap 2420 &= ~MWIFIEX_PASSIVE_SCAN; 2421 2422 if (bgscan_cfg_in->chan_list[chan_idx].scan_time) { 2423 scan_dur = (u16)bgscan_cfg_in-> 2424 chan_list[chan_idx].scan_time; 2425 } else { 2426 scan_dur = (scan_type == 2427 MWIFIEX_SCAN_TYPE_PASSIVE) ? 2428 priv->adapter->passive_scan_time : 2429 priv->adapter->specific_scan_time; 2430 } 2431 2432 temp_chan->min_scan_time = cpu_to_le16(scan_dur); 2433 temp_chan->max_scan_time = cpu_to_le16(scan_dur); 2434 } 2435 } else { 2436 dev_dbg(priv->adapter->dev, 2437 "info: bgscan: Creating full region channel list\n"); 2438 chan_num = 2439 mwifiex_bgscan_create_channel_list(priv, bgscan_cfg_in, 2440 chan_list_tlv-> 2441 chan_scan_param); 2442 le16_unaligned_add_cpu(&chan_list_tlv->header.len, 2443 chan_num * 2444 sizeof(chan_list_tlv->chan_scan_param[0])); 2445 } 2446 2447 tlv_pos += (sizeof(chan_list_tlv->header) 2448 + le16_to_cpu(chan_list_tlv->header.len)); 2449 2450 if (bgscan_cfg_in->start_later) { 2451 start_later_tlv = 2452 (struct mwifiex_ie_types_bgscan_start_later *)tlv_pos; 2453 start_later_tlv->header.type = 2454 cpu_to_le16(TLV_TYPE_BGSCAN_START_LATER); 2455 start_later_tlv->header.len = 2456 cpu_to_le16(sizeof(start_later_tlv->start_later)); 2457 start_later_tlv->start_later = 2458 cpu_to_le16(bgscan_cfg_in->start_later); 2459 2460 tlv_pos += sizeof(start_later_tlv->header) + 2461 le16_to_cpu(start_later_tlv->header.len); 2462 } 2463 2464 /* Append vendor specific IE TLV */ 2465 mwifiex_cmd_append_vsie_tlv(priv, MWIFIEX_VSIE_MASK_BGSCAN, &tlv_pos); 2466 2467 le16_unaligned_add_cpu(&cmd->size, tlv_pos - bgscan_config->tlv); 2468 2469 return 0; 2470 } 2471 2472 int mwifiex_stop_bg_scan(struct mwifiex_private *priv) 2473 { 2474 struct mwifiex_bg_scan_cfg *bgscan_cfg; 2475 2476 if (!priv->sched_scanning) { 2477 dev_dbg(priv->adapter->dev, "bgscan already stopped!\n"); 2478 return 0; 2479 } 2480 2481 bgscan_cfg = kzalloc(sizeof(*bgscan_cfg), GFP_KERNEL); 2482 if (!bgscan_cfg) 2483 return -ENOMEM; 2484 2485 bgscan_cfg->bss_type = MWIFIEX_BSS_MODE_INFRA; 2486 bgscan_cfg->action = MWIFIEX_BGSCAN_ACT_SET; 2487 bgscan_cfg->enable = false; 2488 2489 if (mwifiex_send_cmd(priv, HostCmd_CMD_802_11_BG_SCAN_CONFIG, 2490 HostCmd_ACT_GEN_SET, 0, bgscan_cfg, true)) { 2491 kfree(bgscan_cfg); 2492 return -EFAULT; 2493 } 2494 2495 kfree(bgscan_cfg); 2496 priv->sched_scanning = false; 2497 2498 return 0; 2499 } 2500 2501 static void 2502 mwifiex_update_chan_statistics(struct mwifiex_private *priv, 2503 struct mwifiex_ietypes_chanstats *tlv_stat) 2504 { 2505 struct mwifiex_adapter *adapter = priv->adapter; 2506 u8 i, num_chan; 2507 struct mwifiex_fw_chan_stats *fw_chan_stats; 2508 struct mwifiex_chan_stats chan_stats; 2509 2510 fw_chan_stats = (void *)((u8 *)tlv_stat + 2511 sizeof(struct mwifiex_ie_types_header)); 2512 num_chan = le16_to_cpu(tlv_stat->header.len) / 2513 sizeof(struct mwifiex_chan_stats); 2514 2515 for (i = 0 ; i < num_chan; i++) { 2516 if (adapter->survey_idx >= adapter->num_in_chan_stats) { 2517 mwifiex_dbg(adapter, WARN, 2518 "FW reported too many channel results (max %d)\n", 2519 adapter->num_in_chan_stats); 2520 return; 2521 } 2522 chan_stats.chan_num = fw_chan_stats->chan_num; 2523 chan_stats.bandcfg = fw_chan_stats->bandcfg; 2524 chan_stats.flags = fw_chan_stats->flags; 2525 chan_stats.noise = fw_chan_stats->noise; 2526 chan_stats.total_bss = le16_to_cpu(fw_chan_stats->total_bss); 2527 chan_stats.cca_scan_dur = 2528 le16_to_cpu(fw_chan_stats->cca_scan_dur); 2529 chan_stats.cca_busy_dur = 2530 le16_to_cpu(fw_chan_stats->cca_busy_dur); 2531 mwifiex_dbg(adapter, INFO, 2532 "chan=%d, noise=%d, total_network=%d scan_duration=%d, busy_duration=%d\n", 2533 chan_stats.chan_num, 2534 chan_stats.noise, 2535 chan_stats.total_bss, 2536 chan_stats.cca_scan_dur, 2537 chan_stats.cca_busy_dur); 2538 memcpy(&adapter->chan_stats[adapter->survey_idx++], &chan_stats, 2539 sizeof(struct mwifiex_chan_stats)); 2540 fw_chan_stats++; 2541 } 2542 } 2543 2544 /* This function handles the command response of extended scan */ 2545 int mwifiex_ret_802_11_scan_ext(struct mwifiex_private *priv, 2546 struct host_cmd_ds_command *resp) 2547 { 2548 struct mwifiex_adapter *adapter = priv->adapter; 2549 struct host_cmd_ds_802_11_scan_ext *ext_scan_resp; 2550 struct mwifiex_ie_types_header *tlv; 2551 struct mwifiex_ietypes_chanstats *tlv_stat; 2552 u16 buf_left, type, len; 2553 2554 struct host_cmd_ds_command *cmd_ptr; 2555 struct cmd_ctrl_node *cmd_node; 2556 bool complete_scan = false; 2557 2558 mwifiex_dbg(adapter, INFO, "info: EXT scan returns successfully\n"); 2559 2560 ext_scan_resp = &resp->params.ext_scan; 2561 2562 tlv = (void *)ext_scan_resp->tlv_buffer; 2563 buf_left = le16_to_cpu(resp->size) - (sizeof(*ext_scan_resp) + S_DS_GEN 2564 - 1); 2565 2566 while (buf_left >= sizeof(struct mwifiex_ie_types_header)) { 2567 type = le16_to_cpu(tlv->type); 2568 len = le16_to_cpu(tlv->len); 2569 2570 if (buf_left < (sizeof(struct mwifiex_ie_types_header) + len)) { 2571 mwifiex_dbg(adapter, ERROR, 2572 "error processing scan response TLVs"); 2573 break; 2574 } 2575 2576 switch (type) { 2577 case TLV_TYPE_CHANNEL_STATS: 2578 tlv_stat = (void *)tlv; 2579 mwifiex_update_chan_statistics(priv, tlv_stat); 2580 break; 2581 default: 2582 break; 2583 } 2584 2585 buf_left -= len + sizeof(struct mwifiex_ie_types_header); 2586 tlv = (void *)((u8 *)tlv + len + 2587 sizeof(struct mwifiex_ie_types_header)); 2588 } 2589 2590 spin_lock_bh(&adapter->cmd_pending_q_lock); 2591 spin_lock_bh(&adapter->scan_pending_q_lock); 2592 if (list_empty(&adapter->scan_pending_q)) { 2593 complete_scan = true; 2594 list_for_each_entry(cmd_node, &adapter->cmd_pending_q, list) { 2595 cmd_ptr = (void *)cmd_node->cmd_skb->data; 2596 if (le16_to_cpu(cmd_ptr->command) == 2597 HostCmd_CMD_802_11_SCAN_EXT) { 2598 mwifiex_dbg(adapter, INFO, 2599 "Scan pending in command pending list"); 2600 complete_scan = false; 2601 break; 2602 } 2603 } 2604 } 2605 spin_unlock_bh(&adapter->scan_pending_q_lock); 2606 spin_unlock_bh(&adapter->cmd_pending_q_lock); 2607 2608 if (complete_scan) 2609 mwifiex_complete_scan(priv); 2610 2611 return 0; 2612 } 2613 2614 /* This function This function handles the event extended scan report. It 2615 * parses extended scan results and informs to cfg80211 stack. 2616 */ 2617 int mwifiex_handle_event_ext_scan_report(struct mwifiex_private *priv, 2618 void *buf) 2619 { 2620 int ret = 0; 2621 struct mwifiex_adapter *adapter = priv->adapter; 2622 u8 *bss_info; 2623 u32 bytes_left, bytes_left_for_tlv, idx; 2624 u16 type, len; 2625 struct mwifiex_ie_types_data *tlv; 2626 struct mwifiex_ie_types_bss_scan_rsp *scan_rsp_tlv; 2627 struct mwifiex_ie_types_bss_scan_info *scan_info_tlv; 2628 u8 *radio_type; 2629 u64 fw_tsf = 0; 2630 s32 rssi = 0; 2631 struct mwifiex_event_scan_result *event_scan = buf; 2632 u8 num_of_set = event_scan->num_of_set; 2633 u8 *scan_resp = buf + sizeof(struct mwifiex_event_scan_result); 2634 u16 scan_resp_size = le16_to_cpu(event_scan->buf_size); 2635 2636 if (num_of_set > MWIFIEX_MAX_AP) { 2637 mwifiex_dbg(adapter, ERROR, 2638 "EXT_SCAN: Invalid number of AP returned (%d)!!\n", 2639 num_of_set); 2640 ret = -1; 2641 goto check_next_scan; 2642 } 2643 2644 bytes_left = scan_resp_size; 2645 mwifiex_dbg(adapter, INFO, 2646 "EXT_SCAN: size %d, returned %d APs...", 2647 scan_resp_size, num_of_set); 2648 mwifiex_dbg_dump(adapter, CMD_D, "EXT_SCAN buffer:", buf, 2649 scan_resp_size + 2650 sizeof(struct mwifiex_event_scan_result)); 2651 2652 tlv = (struct mwifiex_ie_types_data *)scan_resp; 2653 2654 for (idx = 0; idx < num_of_set && bytes_left; idx++) { 2655 type = le16_to_cpu(tlv->header.type); 2656 len = le16_to_cpu(tlv->header.len); 2657 if (bytes_left < sizeof(struct mwifiex_ie_types_header) + len) { 2658 mwifiex_dbg(adapter, ERROR, 2659 "EXT_SCAN: Error bytes left < TLV length\n"); 2660 break; 2661 } 2662 scan_rsp_tlv = NULL; 2663 scan_info_tlv = NULL; 2664 bytes_left_for_tlv = bytes_left; 2665 2666 /* BSS response TLV with beacon or probe response buffer 2667 * at the initial position of each descriptor 2668 */ 2669 if (type != TLV_TYPE_BSS_SCAN_RSP) 2670 break; 2671 2672 bss_info = (u8 *)tlv; 2673 scan_rsp_tlv = (struct mwifiex_ie_types_bss_scan_rsp *)tlv; 2674 tlv = (struct mwifiex_ie_types_data *)(tlv->data + len); 2675 bytes_left_for_tlv -= 2676 (len + sizeof(struct mwifiex_ie_types_header)); 2677 2678 while (bytes_left_for_tlv >= 2679 sizeof(struct mwifiex_ie_types_header) && 2680 le16_to_cpu(tlv->header.type) != TLV_TYPE_BSS_SCAN_RSP) { 2681 type = le16_to_cpu(tlv->header.type); 2682 len = le16_to_cpu(tlv->header.len); 2683 if (bytes_left_for_tlv < 2684 sizeof(struct mwifiex_ie_types_header) + len) { 2685 mwifiex_dbg(adapter, ERROR, 2686 "EXT_SCAN: Error in processing TLV,\t" 2687 "bytes left < TLV length\n"); 2688 scan_rsp_tlv = NULL; 2689 bytes_left_for_tlv = 0; 2690 continue; 2691 } 2692 switch (type) { 2693 case TLV_TYPE_BSS_SCAN_INFO: 2694 scan_info_tlv = 2695 (struct mwifiex_ie_types_bss_scan_info *)tlv; 2696 if (len != 2697 sizeof(struct mwifiex_ie_types_bss_scan_info) - 2698 sizeof(struct mwifiex_ie_types_header)) { 2699 bytes_left_for_tlv = 0; 2700 continue; 2701 } 2702 break; 2703 default: 2704 break; 2705 } 2706 tlv = (struct mwifiex_ie_types_data *)(tlv->data + len); 2707 bytes_left -= 2708 (len + sizeof(struct mwifiex_ie_types_header)); 2709 bytes_left_for_tlv -= 2710 (len + sizeof(struct mwifiex_ie_types_header)); 2711 } 2712 2713 if (!scan_rsp_tlv) 2714 break; 2715 2716 /* Advance pointer to the beacon buffer length and 2717 * update the bytes count so that the function 2718 * wlan_interpret_bss_desc_with_ie() can handle the 2719 * scan buffer withut any change 2720 */ 2721 bss_info += sizeof(u16); 2722 bytes_left -= sizeof(u16); 2723 2724 if (scan_info_tlv) { 2725 rssi = (s32)(s16)(le16_to_cpu(scan_info_tlv->rssi)); 2726 rssi *= 100; /* Convert dBm to mBm */ 2727 mwifiex_dbg(adapter, INFO, 2728 "info: InterpretIE: RSSI=%d\n", rssi); 2729 fw_tsf = le64_to_cpu(scan_info_tlv->tsf); 2730 radio_type = &scan_info_tlv->radio_type; 2731 } else { 2732 radio_type = NULL; 2733 } 2734 ret = mwifiex_parse_single_response_buf(priv, &bss_info, 2735 &bytes_left, fw_tsf, 2736 radio_type, true, rssi); 2737 if (ret) 2738 goto check_next_scan; 2739 } 2740 2741 check_next_scan: 2742 if (!event_scan->more_event) 2743 mwifiex_check_next_scan_command(priv); 2744 2745 return ret; 2746 } 2747 2748 /* 2749 * This function prepares command for background scan query. 2750 * 2751 * Preparation includes - 2752 * - Setting command ID and proper size 2753 * - Setting background scan flush parameter 2754 * - Ensuring correct endian-ness 2755 */ 2756 int mwifiex_cmd_802_11_bg_scan_query(struct host_cmd_ds_command *cmd) 2757 { 2758 struct host_cmd_ds_802_11_bg_scan_query *bg_query = 2759 &cmd->params.bg_scan_query; 2760 2761 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_BG_SCAN_QUERY); 2762 cmd->size = cpu_to_le16(sizeof(struct host_cmd_ds_802_11_bg_scan_query) 2763 + S_DS_GEN); 2764 2765 bg_query->flush = 1; 2766 2767 return 0; 2768 } 2769 2770 /* 2771 * This function inserts scan command node to the scan pending queue. 2772 */ 2773 void 2774 mwifiex_queue_scan_cmd(struct mwifiex_private *priv, 2775 struct cmd_ctrl_node *cmd_node) 2776 { 2777 struct mwifiex_adapter *adapter = priv->adapter; 2778 2779 cmd_node->wait_q_enabled = true; 2780 cmd_node->condition = &adapter->scan_wait_q_woken; 2781 spin_lock_bh(&adapter->scan_pending_q_lock); 2782 list_add_tail(&cmd_node->list, &adapter->scan_pending_q); 2783 spin_unlock_bh(&adapter->scan_pending_q_lock); 2784 } 2785 2786 /* 2787 * This function sends a scan command for all available channels to the 2788 * firmware, filtered on a specific SSID. 2789 */ 2790 static int mwifiex_scan_specific_ssid(struct mwifiex_private *priv, 2791 struct cfg80211_ssid *req_ssid) 2792 { 2793 struct mwifiex_adapter *adapter = priv->adapter; 2794 int ret; 2795 struct mwifiex_user_scan_cfg *scan_cfg; 2796 2797 if (adapter->scan_processing) { 2798 mwifiex_dbg(adapter, WARN, 2799 "cmd: Scan already in process...\n"); 2800 return -EBUSY; 2801 } 2802 2803 if (priv->scan_block) { 2804 mwifiex_dbg(adapter, WARN, 2805 "cmd: Scan is blocked during association...\n"); 2806 return -EBUSY; 2807 } 2808 2809 scan_cfg = kzalloc(sizeof(struct mwifiex_user_scan_cfg), GFP_KERNEL); 2810 if (!scan_cfg) 2811 return -ENOMEM; 2812 2813 scan_cfg->ssid_list = req_ssid; 2814 scan_cfg->num_ssids = 1; 2815 2816 ret = mwifiex_scan_networks(priv, scan_cfg); 2817 2818 kfree(scan_cfg); 2819 return ret; 2820 } 2821 2822 /* 2823 * Sends IOCTL request to start a scan. 2824 * 2825 * This function allocates the IOCTL request buffer, fills it 2826 * with requisite parameters and calls the IOCTL handler. 2827 * 2828 * Scan command can be issued for both normal scan and specific SSID 2829 * scan, depending upon whether an SSID is provided or not. 2830 */ 2831 int mwifiex_request_scan(struct mwifiex_private *priv, 2832 struct cfg80211_ssid *req_ssid) 2833 { 2834 int ret; 2835 2836 if (mutex_lock_interruptible(&priv->async_mutex)) { 2837 mwifiex_dbg(priv->adapter, ERROR, 2838 "%s: acquire semaphore fail\n", 2839 __func__); 2840 return -1; 2841 } 2842 2843 priv->adapter->scan_wait_q_woken = false; 2844 2845 if (req_ssid && req_ssid->ssid_len != 0) 2846 /* Specific SSID scan */ 2847 ret = mwifiex_scan_specific_ssid(priv, req_ssid); 2848 else 2849 /* Normal scan */ 2850 ret = mwifiex_scan_networks(priv, NULL); 2851 2852 mutex_unlock(&priv->async_mutex); 2853 2854 return ret; 2855 } 2856 2857 /* 2858 * This function appends the vendor specific IE TLV to a buffer. 2859 */ 2860 int 2861 mwifiex_cmd_append_vsie_tlv(struct mwifiex_private *priv, 2862 u16 vsie_mask, u8 **buffer) 2863 { 2864 int id, ret_len = 0; 2865 struct mwifiex_ie_types_vendor_param_set *vs_param_set; 2866 2867 if (!buffer) 2868 return 0; 2869 if (!(*buffer)) 2870 return 0; 2871 2872 /* 2873 * Traverse through the saved vendor specific IE array and append 2874 * the selected(scan/assoc/adhoc) IE as TLV to the command 2875 */ 2876 for (id = 0; id < MWIFIEX_MAX_VSIE_NUM; id++) { 2877 if (priv->vs_ie[id].mask & vsie_mask) { 2878 vs_param_set = 2879 (struct mwifiex_ie_types_vendor_param_set *) 2880 *buffer; 2881 vs_param_set->header.type = 2882 cpu_to_le16(TLV_TYPE_PASSTHROUGH); 2883 vs_param_set->header.len = 2884 cpu_to_le16((((u16) priv->vs_ie[id].ie[1]) 2885 & 0x00FF) + 2); 2886 if (le16_to_cpu(vs_param_set->header.len) > 2887 MWIFIEX_MAX_VSIE_LEN) { 2888 mwifiex_dbg(priv->adapter, ERROR, 2889 "Invalid param length!\n"); 2890 break; 2891 } 2892 2893 memcpy(vs_param_set->ie, priv->vs_ie[id].ie, 2894 le16_to_cpu(vs_param_set->header.len)); 2895 *buffer += le16_to_cpu(vs_param_set->header.len) + 2896 sizeof(struct mwifiex_ie_types_header); 2897 ret_len += le16_to_cpu(vs_param_set->header.len) + 2898 sizeof(struct mwifiex_ie_types_header); 2899 } 2900 } 2901 return ret_len; 2902 } 2903 2904 /* 2905 * This function saves a beacon buffer of the current BSS descriptor. 2906 * 2907 * The current beacon buffer is saved so that it can be restored in the 2908 * following cases that makes the beacon buffer not to contain the current 2909 * ssid's beacon buffer. 2910 * - The current ssid was not found somehow in the last scan. 2911 * - The current ssid was the last entry of the scan table and overloaded. 2912 */ 2913 void 2914 mwifiex_save_curr_bcn(struct mwifiex_private *priv) 2915 { 2916 struct mwifiex_bssdescriptor *curr_bss = 2917 &priv->curr_bss_params.bss_descriptor; 2918 2919 if (!curr_bss->beacon_buf_size) 2920 return; 2921 2922 /* allocate beacon buffer at 1st time; or if it's size has changed */ 2923 if (!priv->curr_bcn_buf || 2924 priv->curr_bcn_size != curr_bss->beacon_buf_size) { 2925 priv->curr_bcn_size = curr_bss->beacon_buf_size; 2926 2927 kfree(priv->curr_bcn_buf); 2928 priv->curr_bcn_buf = kmalloc(curr_bss->beacon_buf_size, 2929 GFP_ATOMIC); 2930 if (!priv->curr_bcn_buf) 2931 return; 2932 } 2933 2934 memcpy(priv->curr_bcn_buf, curr_bss->beacon_buf, 2935 curr_bss->beacon_buf_size); 2936 mwifiex_dbg(priv->adapter, INFO, 2937 "info: current beacon saved %d\n", 2938 priv->curr_bcn_size); 2939 2940 curr_bss->beacon_buf = priv->curr_bcn_buf; 2941 2942 /* adjust the pointers in the current BSS descriptor */ 2943 if (curr_bss->bcn_wpa_ie) 2944 curr_bss->bcn_wpa_ie = 2945 (struct ieee_types_vendor_specific *) 2946 (curr_bss->beacon_buf + 2947 curr_bss->wpa_offset); 2948 2949 if (curr_bss->bcn_rsn_ie) 2950 curr_bss->bcn_rsn_ie = (struct ieee_types_generic *) 2951 (curr_bss->beacon_buf + 2952 curr_bss->rsn_offset); 2953 2954 if (curr_bss->bcn_ht_cap) 2955 curr_bss->bcn_ht_cap = (struct ieee80211_ht_cap *) 2956 (curr_bss->beacon_buf + 2957 curr_bss->ht_cap_offset); 2958 2959 if (curr_bss->bcn_ht_oper) 2960 curr_bss->bcn_ht_oper = (struct ieee80211_ht_operation *) 2961 (curr_bss->beacon_buf + 2962 curr_bss->ht_info_offset); 2963 2964 if (curr_bss->bcn_vht_cap) 2965 curr_bss->bcn_vht_cap = (void *)(curr_bss->beacon_buf + 2966 curr_bss->vht_cap_offset); 2967 2968 if (curr_bss->bcn_vht_oper) 2969 curr_bss->bcn_vht_oper = (void *)(curr_bss->beacon_buf + 2970 curr_bss->vht_info_offset); 2971 2972 if (curr_bss->bcn_bss_co_2040) 2973 curr_bss->bcn_bss_co_2040 = 2974 (curr_bss->beacon_buf + curr_bss->bss_co_2040_offset); 2975 2976 if (curr_bss->bcn_ext_cap) 2977 curr_bss->bcn_ext_cap = curr_bss->beacon_buf + 2978 curr_bss->ext_cap_offset; 2979 2980 if (curr_bss->oper_mode) 2981 curr_bss->oper_mode = (void *)(curr_bss->beacon_buf + 2982 curr_bss->oper_mode_offset); 2983 } 2984 2985 /* 2986 * This function frees the current BSS descriptor beacon buffer. 2987 */ 2988 void 2989 mwifiex_free_curr_bcn(struct mwifiex_private *priv) 2990 { 2991 kfree(priv->curr_bcn_buf); 2992 priv->curr_bcn_buf = NULL; 2993 } 2994