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