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