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