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