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 scan_chan_list[chan_idx].max_scan_time = 487 cpu_to_le16(adapter->passive_scan_time); 488 else 489 scan_chan_list[chan_idx].max_scan_time = 490 cpu_to_le16(adapter->active_scan_time); 491 492 if (ch->flags & IEEE80211_CHAN_NO_IR) 493 scan_chan_list[chan_idx].chan_scan_mode_bitmap 494 |= (MWIFIEX_PASSIVE_SCAN | 495 MWIFIEX_HIDDEN_SSID_REPORT); 496 else 497 scan_chan_list[chan_idx].chan_scan_mode_bitmap 498 &= ~MWIFIEX_PASSIVE_SCAN; 499 scan_chan_list[chan_idx].chan_number = 500 (u32) ch->hw_value; 501 502 scan_chan_list[chan_idx].chan_scan_mode_bitmap 503 |= MWIFIEX_DISABLE_CHAN_FILT; 504 505 if (filtered_scan) { 506 scan_chan_list[chan_idx].max_scan_time = 507 cpu_to_le16(adapter->specific_scan_time); 508 } 509 chan_idx++; 510 } 511 512 } 513 return chan_idx; 514 } 515 516 /* This function creates a channel list tlv for bgscan config, based 517 * on region/band information. 518 */ 519 static int 520 mwifiex_bgscan_create_channel_list(struct mwifiex_private *priv, 521 const struct mwifiex_bg_scan_cfg 522 *bgscan_cfg_in, 523 struct mwifiex_chan_scan_param_set 524 *scan_chan_list) 525 { 526 enum nl80211_band band; 527 struct ieee80211_supported_band *sband; 528 struct ieee80211_channel *ch; 529 struct mwifiex_adapter *adapter = priv->adapter; 530 int chan_idx = 0, i; 531 532 for (band = 0; (band < NUM_NL80211_BANDS); band++) { 533 if (!priv->wdev.wiphy->bands[band]) 534 continue; 535 536 sband = priv->wdev.wiphy->bands[band]; 537 538 for (i = 0; (i < sband->n_channels) ; i++) { 539 ch = &sband->channels[i]; 540 if (ch->flags & IEEE80211_CHAN_DISABLED) 541 continue; 542 scan_chan_list[chan_idx].radio_type = band; 543 544 if (bgscan_cfg_in->chan_list[0].scan_time) 545 scan_chan_list[chan_idx].max_scan_time = 546 cpu_to_le16((u16)bgscan_cfg_in-> 547 chan_list[0].scan_time); 548 else if (ch->flags & IEEE80211_CHAN_NO_IR) 549 scan_chan_list[chan_idx].max_scan_time = 550 cpu_to_le16(adapter->passive_scan_time); 551 else 552 scan_chan_list[chan_idx].max_scan_time = 553 cpu_to_le16(adapter-> 554 specific_scan_time); 555 556 if (ch->flags & IEEE80211_CHAN_NO_IR) 557 scan_chan_list[chan_idx].chan_scan_mode_bitmap 558 |= MWIFIEX_PASSIVE_SCAN; 559 else 560 scan_chan_list[chan_idx].chan_scan_mode_bitmap 561 &= ~MWIFIEX_PASSIVE_SCAN; 562 563 scan_chan_list[chan_idx].chan_number = 564 (u32)ch->hw_value; 565 chan_idx++; 566 } 567 } 568 return chan_idx; 569 } 570 571 /* This function appends rate TLV to scan config command. */ 572 static int 573 mwifiex_append_rate_tlv(struct mwifiex_private *priv, 574 struct mwifiex_scan_cmd_config *scan_cfg_out, 575 u8 radio) 576 { 577 struct mwifiex_ie_types_rates_param_set *rates_tlv; 578 u8 rates[MWIFIEX_SUPPORTED_RATES], *tlv_pos; 579 u32 rates_size; 580 581 memset(rates, 0, sizeof(rates)); 582 583 tlv_pos = (u8 *)scan_cfg_out->tlv_buf + scan_cfg_out->tlv_buf_len; 584 585 if (priv->scan_request) 586 rates_size = mwifiex_get_rates_from_cfg80211(priv, rates, 587 radio); 588 else 589 rates_size = mwifiex_get_supported_rates(priv, rates); 590 591 mwifiex_dbg(priv->adapter, CMD, 592 "info: SCAN_CMD: Rates size = %d\n", 593 rates_size); 594 rates_tlv = (struct mwifiex_ie_types_rates_param_set *)tlv_pos; 595 rates_tlv->header.type = cpu_to_le16(WLAN_EID_SUPP_RATES); 596 rates_tlv->header.len = cpu_to_le16((u16) rates_size); 597 memcpy(rates_tlv->rates, rates, rates_size); 598 scan_cfg_out->tlv_buf_len += sizeof(rates_tlv->header) + rates_size; 599 600 return rates_size; 601 } 602 603 /* 604 * This function constructs and sends multiple scan config commands to 605 * the firmware. 606 * 607 * Previous routines in the code flow have created a scan command configuration 608 * with any requested TLVs. This function splits the channel TLV into maximum 609 * channels supported per scan lists and sends the portion of the channel TLV, 610 * along with the other TLVs, to the firmware. 611 */ 612 static int 613 mwifiex_scan_channel_list(struct mwifiex_private *priv, 614 u32 max_chan_per_scan, u8 filtered_scan, 615 struct mwifiex_scan_cmd_config *scan_cfg_out, 616 struct mwifiex_ie_types_chan_list_param_set 617 *chan_tlv_out, 618 struct mwifiex_chan_scan_param_set *scan_chan_list) 619 { 620 struct mwifiex_adapter *adapter = priv->adapter; 621 int ret = 0; 622 struct mwifiex_chan_scan_param_set *tmp_chan_list; 623 struct mwifiex_chan_scan_param_set *start_chan; 624 u32 tlv_idx, rates_size, cmd_no; 625 u32 total_scan_time; 626 u32 done_early; 627 u8 radio_type; 628 629 if (!scan_cfg_out || !chan_tlv_out || !scan_chan_list) { 630 mwifiex_dbg(priv->adapter, ERROR, 631 "info: Scan: Null detect: %p, %p, %p\n", 632 scan_cfg_out, chan_tlv_out, scan_chan_list); 633 return -1; 634 } 635 636 /* Check csa channel expiry before preparing scan list */ 637 mwifiex_11h_get_csa_closed_channel(priv); 638 639 chan_tlv_out->header.type = cpu_to_le16(TLV_TYPE_CHANLIST); 640 641 /* Set the temp channel struct pointer to the start of the desired 642 list */ 643 tmp_chan_list = scan_chan_list; 644 645 /* Loop through the desired channel list, sending a new firmware scan 646 commands for each max_chan_per_scan channels (or for 1,6,11 647 individually if configured accordingly) */ 648 while (tmp_chan_list->chan_number) { 649 650 tlv_idx = 0; 651 total_scan_time = 0; 652 radio_type = 0; 653 chan_tlv_out->header.len = 0; 654 start_chan = tmp_chan_list; 655 done_early = false; 656 657 /* 658 * Construct the Channel TLV for the scan command. Continue to 659 * insert channel TLVs until: 660 * - the tlv_idx hits the maximum configured per scan command 661 * - the next channel to insert is 0 (end of desired channel 662 * list) 663 * - done_early is set (controlling individual scanning of 664 * 1,6,11) 665 */ 666 while (tlv_idx < max_chan_per_scan && 667 tmp_chan_list->chan_number && !done_early) { 668 669 if (tmp_chan_list->chan_number == priv->csa_chan) { 670 tmp_chan_list++; 671 continue; 672 } 673 674 radio_type = tmp_chan_list->radio_type; 675 mwifiex_dbg(priv->adapter, INFO, 676 "info: Scan: Chan(%3d), Radio(%d),\t" 677 "Mode(%d, %d), Dur(%d)\n", 678 tmp_chan_list->chan_number, 679 tmp_chan_list->radio_type, 680 tmp_chan_list->chan_scan_mode_bitmap 681 & MWIFIEX_PASSIVE_SCAN, 682 (tmp_chan_list->chan_scan_mode_bitmap 683 & MWIFIEX_DISABLE_CHAN_FILT) >> 1, 684 le16_to_cpu(tmp_chan_list->max_scan_time)); 685 686 /* Copy the current channel TLV to the command being 687 prepared */ 688 memcpy(chan_tlv_out->chan_scan_param + tlv_idx, 689 tmp_chan_list, 690 sizeof(chan_tlv_out->chan_scan_param)); 691 692 /* Increment the TLV header length by the size 693 appended */ 694 le16_add_cpu(&chan_tlv_out->header.len, 695 sizeof(chan_tlv_out->chan_scan_param)); 696 697 /* 698 * The tlv buffer length is set to the number of bytes 699 * of the between the channel tlv pointer and the start 700 * of the tlv buffer. This compensates for any TLVs 701 * that were appended before the channel list. 702 */ 703 scan_cfg_out->tlv_buf_len = (u32) ((u8 *) chan_tlv_out - 704 scan_cfg_out->tlv_buf); 705 706 /* Add the size of the channel tlv header and the data 707 length */ 708 scan_cfg_out->tlv_buf_len += 709 (sizeof(chan_tlv_out->header) 710 + le16_to_cpu(chan_tlv_out->header.len)); 711 712 /* Increment the index to the channel tlv we are 713 constructing */ 714 tlv_idx++; 715 716 /* Count the total scan time per command */ 717 total_scan_time += 718 le16_to_cpu(tmp_chan_list->max_scan_time); 719 720 done_early = false; 721 722 /* Stop the loop if the *current* channel is in the 723 1,6,11 set and we are not filtering on a BSSID 724 or SSID. */ 725 if (!filtered_scan && 726 (tmp_chan_list->chan_number == 1 || 727 tmp_chan_list->chan_number == 6 || 728 tmp_chan_list->chan_number == 11)) 729 done_early = true; 730 731 /* Increment the tmp pointer to the next channel to 732 be scanned */ 733 tmp_chan_list++; 734 735 /* Stop the loop if the *next* channel is in the 1,6,11 736 set. This will cause it to be the only channel 737 scanned on the next interation */ 738 if (!filtered_scan && 739 (tmp_chan_list->chan_number == 1 || 740 tmp_chan_list->chan_number == 6 || 741 tmp_chan_list->chan_number == 11)) 742 done_early = true; 743 } 744 745 /* The total scan time should be less than scan command timeout 746 value */ 747 if (total_scan_time > MWIFIEX_MAX_TOTAL_SCAN_TIME) { 748 mwifiex_dbg(priv->adapter, ERROR, 749 "total scan time %dms\t" 750 "is over limit (%dms), scan skipped\n", 751 total_scan_time, 752 MWIFIEX_MAX_TOTAL_SCAN_TIME); 753 ret = -1; 754 break; 755 } 756 757 rates_size = mwifiex_append_rate_tlv(priv, scan_cfg_out, 758 radio_type); 759 760 priv->adapter->scan_channels = start_chan; 761 762 /* Send the scan command to the firmware with the specified 763 cfg */ 764 if (priv->adapter->ext_scan) 765 cmd_no = HostCmd_CMD_802_11_SCAN_EXT; 766 else 767 cmd_no = HostCmd_CMD_802_11_SCAN; 768 769 ret = mwifiex_send_cmd(priv, cmd_no, HostCmd_ACT_GEN_SET, 770 0, scan_cfg_out, false); 771 772 /* rate IE is updated per scan command but same starting 773 * pointer is used each time so that rate IE from earlier 774 * scan_cfg_out->buf is overwritten with new one. 775 */ 776 scan_cfg_out->tlv_buf_len -= 777 sizeof(struct mwifiex_ie_types_header) + rates_size; 778 779 if (ret) { 780 mwifiex_cancel_pending_scan_cmd(adapter); 781 break; 782 } 783 } 784 785 if (ret) 786 return -1; 787 788 return 0; 789 } 790 791 /* 792 * This function constructs a scan command configuration structure to use 793 * in scan commands. 794 * 795 * Application layer or other functions can invoke network scanning 796 * with a scan configuration supplied in a user scan configuration structure. 797 * This structure is used as the basis of one or many scan command configuration 798 * commands that are sent to the command processing module and eventually to the 799 * firmware. 800 * 801 * This function creates a scan command configuration structure based on the 802 * following user supplied parameters (if present): 803 * - SSID filter 804 * - BSSID filter 805 * - Number of Probes to be sent 806 * - Channel list 807 * 808 * If the SSID or BSSID filter is not present, the filter is disabled/cleared. 809 * If the number of probes is not set, adapter default setting is used. 810 */ 811 static void 812 mwifiex_config_scan(struct mwifiex_private *priv, 813 const struct mwifiex_user_scan_cfg *user_scan_in, 814 struct mwifiex_scan_cmd_config *scan_cfg_out, 815 struct mwifiex_ie_types_chan_list_param_set **chan_list_out, 816 struct mwifiex_chan_scan_param_set *scan_chan_list, 817 u8 *max_chan_per_scan, u8 *filtered_scan, 818 u8 *scan_current_only) 819 { 820 struct mwifiex_adapter *adapter = priv->adapter; 821 struct mwifiex_ie_types_num_probes *num_probes_tlv; 822 struct mwifiex_ie_types_scan_chan_gap *chan_gap_tlv; 823 struct mwifiex_ie_types_random_mac *random_mac_tlv; 824 struct mwifiex_ie_types_wildcard_ssid_params *wildcard_ssid_tlv; 825 struct mwifiex_ie_types_bssid_list *bssid_tlv; 826 u8 *tlv_pos; 827 u32 num_probes; 828 u32 ssid_len; 829 u32 chan_idx; 830 u32 scan_type; 831 u16 scan_dur; 832 u8 channel; 833 u8 radio_type; 834 int i; 835 u8 ssid_filter; 836 struct mwifiex_ie_types_htcap *ht_cap; 837 struct mwifiex_ie_types_bss_mode *bss_mode; 838 const u8 zero_mac[6] = {0, 0, 0, 0, 0, 0}; 839 840 /* The tlv_buf_len is calculated for each scan command. The TLVs added 841 in this routine will be preserved since the routine that sends the 842 command will append channelTLVs at *chan_list_out. The difference 843 between the *chan_list_out and the tlv_buf start will be used to 844 calculate the size of anything we add in this routine. */ 845 scan_cfg_out->tlv_buf_len = 0; 846 847 /* Running tlv pointer. Assigned to chan_list_out at end of function 848 so later routines know where channels can be added to the command 849 buf */ 850 tlv_pos = scan_cfg_out->tlv_buf; 851 852 /* Initialize the scan as un-filtered; the flag is later set to TRUE 853 below if a SSID or BSSID filter is sent in the command */ 854 *filtered_scan = false; 855 856 /* Initialize the scan as not being only on the current channel. If 857 the channel list is customized, only contains one channel, and is 858 the active channel, this is set true and data flow is not halted. */ 859 *scan_current_only = false; 860 861 if (user_scan_in) { 862 863 /* Default the ssid_filter flag to TRUE, set false under 864 certain wildcard conditions and qualified by the existence 865 of an SSID list before marking the scan as filtered */ 866 ssid_filter = true; 867 868 /* Set the BSS type scan filter, use Adapter setting if 869 unset */ 870 scan_cfg_out->bss_mode = 871 (u8)(user_scan_in->bss_mode ?: adapter->scan_mode); 872 873 /* Set the number of probes to send, use Adapter setting 874 if unset */ 875 num_probes = user_scan_in->num_probes ?: adapter->scan_probes; 876 877 /* 878 * Set the BSSID filter to the incoming configuration, 879 * if non-zero. If not set, it will remain disabled 880 * (all zeros). 881 */ 882 memcpy(scan_cfg_out->specific_bssid, 883 user_scan_in->specific_bssid, 884 sizeof(scan_cfg_out->specific_bssid)); 885 886 if (adapter->ext_scan && 887 !is_zero_ether_addr(scan_cfg_out->specific_bssid)) { 888 bssid_tlv = 889 (struct mwifiex_ie_types_bssid_list *)tlv_pos; 890 bssid_tlv->header.type = cpu_to_le16(TLV_TYPE_BSSID); 891 bssid_tlv->header.len = cpu_to_le16(ETH_ALEN); 892 memcpy(bssid_tlv->bssid, user_scan_in->specific_bssid, 893 ETH_ALEN); 894 tlv_pos += sizeof(struct mwifiex_ie_types_bssid_list); 895 } 896 897 for (i = 0; i < user_scan_in->num_ssids; i++) { 898 ssid_len = user_scan_in->ssid_list[i].ssid_len; 899 900 wildcard_ssid_tlv = 901 (struct mwifiex_ie_types_wildcard_ssid_params *) 902 tlv_pos; 903 wildcard_ssid_tlv->header.type = 904 cpu_to_le16(TLV_TYPE_WILDCARDSSID); 905 wildcard_ssid_tlv->header.len = cpu_to_le16( 906 (u16) (ssid_len + sizeof(wildcard_ssid_tlv-> 907 max_ssid_length))); 908 909 /* 910 * max_ssid_length = 0 tells firmware to perform 911 * specific scan for the SSID filled, whereas 912 * max_ssid_length = IEEE80211_MAX_SSID_LEN is for 913 * wildcard scan. 914 */ 915 if (ssid_len) 916 wildcard_ssid_tlv->max_ssid_length = 0; 917 else 918 wildcard_ssid_tlv->max_ssid_length = 919 IEEE80211_MAX_SSID_LEN; 920 921 if (!memcmp(user_scan_in->ssid_list[i].ssid, 922 "DIRECT-", 7)) 923 wildcard_ssid_tlv->max_ssid_length = 0xfe; 924 925 memcpy(wildcard_ssid_tlv->ssid, 926 user_scan_in->ssid_list[i].ssid, ssid_len); 927 928 tlv_pos += (sizeof(wildcard_ssid_tlv->header) 929 + le16_to_cpu(wildcard_ssid_tlv->header.len)); 930 931 mwifiex_dbg(adapter, INFO, 932 "info: scan: ssid[%d]: %s, %d\n", 933 i, wildcard_ssid_tlv->ssid, 934 wildcard_ssid_tlv->max_ssid_length); 935 936 /* Empty wildcard ssid with a maxlen will match many or 937 potentially all SSIDs (maxlen == 32), therefore do 938 not treat the scan as 939 filtered. */ 940 if (!ssid_len && wildcard_ssid_tlv->max_ssid_length) 941 ssid_filter = false; 942 } 943 944 /* 945 * The default number of channels sent in the command is low to 946 * ensure the response buffer from the firmware does not 947 * truncate scan results. That is not an issue with an SSID 948 * or BSSID filter applied to the scan results in the firmware. 949 */ 950 if ((i && ssid_filter) || 951 !is_zero_ether_addr(scan_cfg_out->specific_bssid)) 952 *filtered_scan = true; 953 954 if (user_scan_in->scan_chan_gap) { 955 mwifiex_dbg(adapter, INFO, 956 "info: scan: channel gap = %d\n", 957 user_scan_in->scan_chan_gap); 958 *max_chan_per_scan = 959 MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN; 960 961 chan_gap_tlv = (void *)tlv_pos; 962 chan_gap_tlv->header.type = 963 cpu_to_le16(TLV_TYPE_SCAN_CHANNEL_GAP); 964 chan_gap_tlv->header.len = 965 cpu_to_le16(sizeof(chan_gap_tlv->chan_gap)); 966 chan_gap_tlv->chan_gap = 967 cpu_to_le16((user_scan_in->scan_chan_gap)); 968 tlv_pos += 969 sizeof(struct mwifiex_ie_types_scan_chan_gap); 970 } 971 972 if (!ether_addr_equal(user_scan_in->random_mac, zero_mac)) { 973 random_mac_tlv = (void *)tlv_pos; 974 random_mac_tlv->header.type = 975 cpu_to_le16(TLV_TYPE_RANDOM_MAC); 976 random_mac_tlv->header.len = 977 cpu_to_le16(sizeof(random_mac_tlv->mac)); 978 ether_addr_copy(random_mac_tlv->mac, 979 user_scan_in->random_mac); 980 tlv_pos += 981 sizeof(struct mwifiex_ie_types_random_mac); 982 } 983 } else { 984 scan_cfg_out->bss_mode = (u8) adapter->scan_mode; 985 num_probes = adapter->scan_probes; 986 } 987 988 /* 989 * If a specific BSSID or SSID is used, the number of channels in the 990 * scan command will be increased to the absolute maximum. 991 */ 992 if (*filtered_scan) 993 *max_chan_per_scan = MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN; 994 else 995 *max_chan_per_scan = MWIFIEX_DEF_CHANNELS_PER_SCAN_CMD; 996 997 if (adapter->ext_scan) { 998 bss_mode = (struct mwifiex_ie_types_bss_mode *)tlv_pos; 999 bss_mode->header.type = cpu_to_le16(TLV_TYPE_BSS_MODE); 1000 bss_mode->header.len = cpu_to_le16(sizeof(bss_mode->bss_mode)); 1001 bss_mode->bss_mode = scan_cfg_out->bss_mode; 1002 tlv_pos += sizeof(bss_mode->header) + 1003 le16_to_cpu(bss_mode->header.len); 1004 } 1005 1006 /* If the input config or adapter has the number of Probes set, 1007 add tlv */ 1008 if (num_probes) { 1009 1010 mwifiex_dbg(adapter, INFO, 1011 "info: scan: num_probes = %d\n", 1012 num_probes); 1013 1014 num_probes_tlv = (struct mwifiex_ie_types_num_probes *) tlv_pos; 1015 num_probes_tlv->header.type = cpu_to_le16(TLV_TYPE_NUMPROBES); 1016 num_probes_tlv->header.len = 1017 cpu_to_le16(sizeof(num_probes_tlv->num_probes)); 1018 num_probes_tlv->num_probes = cpu_to_le16((u16) num_probes); 1019 1020 tlv_pos += sizeof(num_probes_tlv->header) + 1021 le16_to_cpu(num_probes_tlv->header.len); 1022 1023 } 1024 1025 if (ISSUPP_11NENABLED(priv->adapter->fw_cap_info) && 1026 (priv->adapter->config_bands & BAND_GN || 1027 priv->adapter->config_bands & BAND_AN)) { 1028 ht_cap = (struct mwifiex_ie_types_htcap *) tlv_pos; 1029 memset(ht_cap, 0, sizeof(struct mwifiex_ie_types_htcap)); 1030 ht_cap->header.type = cpu_to_le16(WLAN_EID_HT_CAPABILITY); 1031 ht_cap->header.len = 1032 cpu_to_le16(sizeof(struct ieee80211_ht_cap)); 1033 radio_type = 1034 mwifiex_band_to_radio_type(priv->adapter->config_bands); 1035 mwifiex_fill_cap_info(priv, radio_type, &ht_cap->ht_cap); 1036 tlv_pos += sizeof(struct mwifiex_ie_types_htcap); 1037 } 1038 1039 /* Append vendor specific IE TLV */ 1040 mwifiex_cmd_append_vsie_tlv(priv, MWIFIEX_VSIE_MASK_SCAN, &tlv_pos); 1041 1042 /* 1043 * Set the output for the channel TLV to the address in the tlv buffer 1044 * past any TLVs that were added in this function (SSID, num_probes). 1045 * Channel TLVs will be added past this for each scan command, 1046 * preserving the TLVs that were previously added. 1047 */ 1048 *chan_list_out = 1049 (struct mwifiex_ie_types_chan_list_param_set *) tlv_pos; 1050 1051 if (user_scan_in && user_scan_in->chan_list[0].chan_number) { 1052 1053 mwifiex_dbg(adapter, INFO, 1054 "info: Scan: Using supplied channel list\n"); 1055 1056 for (chan_idx = 0; 1057 chan_idx < MWIFIEX_USER_SCAN_CHAN_MAX && 1058 user_scan_in->chan_list[chan_idx].chan_number; 1059 chan_idx++) { 1060 1061 channel = user_scan_in->chan_list[chan_idx].chan_number; 1062 scan_chan_list[chan_idx].chan_number = channel; 1063 1064 radio_type = 1065 user_scan_in->chan_list[chan_idx].radio_type; 1066 scan_chan_list[chan_idx].radio_type = radio_type; 1067 1068 scan_type = user_scan_in->chan_list[chan_idx].scan_type; 1069 1070 if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE) 1071 scan_chan_list[chan_idx].chan_scan_mode_bitmap 1072 |= (MWIFIEX_PASSIVE_SCAN | 1073 MWIFIEX_HIDDEN_SSID_REPORT); 1074 else 1075 scan_chan_list[chan_idx].chan_scan_mode_bitmap 1076 &= ~MWIFIEX_PASSIVE_SCAN; 1077 1078 scan_chan_list[chan_idx].chan_scan_mode_bitmap 1079 |= MWIFIEX_DISABLE_CHAN_FILT; 1080 1081 if (user_scan_in->chan_list[chan_idx].scan_time) { 1082 scan_dur = (u16) user_scan_in-> 1083 chan_list[chan_idx].scan_time; 1084 } else { 1085 if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE) 1086 scan_dur = adapter->passive_scan_time; 1087 else if (*filtered_scan) 1088 scan_dur = adapter->specific_scan_time; 1089 else 1090 scan_dur = adapter->active_scan_time; 1091 } 1092 1093 scan_chan_list[chan_idx].min_scan_time = 1094 cpu_to_le16(scan_dur); 1095 scan_chan_list[chan_idx].max_scan_time = 1096 cpu_to_le16(scan_dur); 1097 } 1098 1099 /* Check if we are only scanning the current channel */ 1100 if ((chan_idx == 1) && 1101 (user_scan_in->chan_list[0].chan_number == 1102 priv->curr_bss_params.bss_descriptor.channel)) { 1103 *scan_current_only = true; 1104 mwifiex_dbg(adapter, INFO, 1105 "info: Scan: Scanning current channel only\n"); 1106 } 1107 } else { 1108 mwifiex_dbg(adapter, INFO, 1109 "info: Scan: Creating full region channel list\n"); 1110 mwifiex_scan_create_channel_list(priv, user_scan_in, 1111 scan_chan_list, 1112 *filtered_scan); 1113 } 1114 1115 } 1116 1117 /* 1118 * This function inspects the scan response buffer for pointers to 1119 * expected TLVs. 1120 * 1121 * TLVs can be included at the end of the scan response BSS information. 1122 * 1123 * Data in the buffer is parsed pointers to TLVs that can potentially 1124 * be passed back in the response. 1125 */ 1126 static void 1127 mwifiex_ret_802_11_scan_get_tlv_ptrs(struct mwifiex_adapter *adapter, 1128 struct mwifiex_ie_types_data *tlv, 1129 u32 tlv_buf_size, u32 req_tlv_type, 1130 struct mwifiex_ie_types_data **tlv_data) 1131 { 1132 struct mwifiex_ie_types_data *current_tlv; 1133 u32 tlv_buf_left; 1134 u32 tlv_type; 1135 u32 tlv_len; 1136 1137 current_tlv = tlv; 1138 tlv_buf_left = tlv_buf_size; 1139 *tlv_data = NULL; 1140 1141 mwifiex_dbg(adapter, INFO, 1142 "info: SCAN_RESP: tlv_buf_size = %d\n", 1143 tlv_buf_size); 1144 1145 while (tlv_buf_left >= sizeof(struct mwifiex_ie_types_header)) { 1146 1147 tlv_type = le16_to_cpu(current_tlv->header.type); 1148 tlv_len = le16_to_cpu(current_tlv->header.len); 1149 1150 if (sizeof(tlv->header) + tlv_len > tlv_buf_left) { 1151 mwifiex_dbg(adapter, ERROR, 1152 "SCAN_RESP: TLV buffer corrupt\n"); 1153 break; 1154 } 1155 1156 if (req_tlv_type == tlv_type) { 1157 switch (tlv_type) { 1158 case TLV_TYPE_TSFTIMESTAMP: 1159 mwifiex_dbg(adapter, INFO, 1160 "info: SCAN_RESP: TSF\t" 1161 "timestamp TLV, len = %d\n", 1162 tlv_len); 1163 *tlv_data = current_tlv; 1164 break; 1165 case TLV_TYPE_CHANNELBANDLIST: 1166 mwifiex_dbg(adapter, INFO, 1167 "info: SCAN_RESP: channel\t" 1168 "band list TLV, len = %d\n", 1169 tlv_len); 1170 *tlv_data = current_tlv; 1171 break; 1172 default: 1173 mwifiex_dbg(adapter, ERROR, 1174 "SCAN_RESP: unhandled TLV = %d\n", 1175 tlv_type); 1176 /* Give up, this seems corrupted */ 1177 return; 1178 } 1179 } 1180 1181 if (*tlv_data) 1182 break; 1183 1184 1185 tlv_buf_left -= (sizeof(tlv->header) + tlv_len); 1186 current_tlv = 1187 (struct mwifiex_ie_types_data *) (current_tlv->data + 1188 tlv_len); 1189 1190 } /* while */ 1191 } 1192 1193 /* 1194 * This function parses provided beacon buffer and updates 1195 * respective fields in bss descriptor structure. 1196 */ 1197 int mwifiex_update_bss_desc_with_ie(struct mwifiex_adapter *adapter, 1198 struct mwifiex_bssdescriptor *bss_entry) 1199 { 1200 int ret = 0; 1201 u8 element_id; 1202 struct ieee_types_fh_param_set *fh_param_set; 1203 struct ieee_types_ds_param_set *ds_param_set; 1204 struct ieee_types_cf_param_set *cf_param_set; 1205 struct ieee_types_ibss_param_set *ibss_param_set; 1206 u8 *current_ptr; 1207 u8 *rate; 1208 u8 element_len; 1209 u16 total_ie_len; 1210 u8 bytes_to_copy; 1211 u8 rate_size; 1212 u8 found_data_rate_ie; 1213 u32 bytes_left; 1214 struct ieee_types_vendor_specific *vendor_ie; 1215 const u8 wpa_oui[4] = { 0x00, 0x50, 0xf2, 0x01 }; 1216 const u8 wmm_oui[4] = { 0x00, 0x50, 0xf2, 0x02 }; 1217 1218 found_data_rate_ie = false; 1219 rate_size = 0; 1220 current_ptr = bss_entry->beacon_buf; 1221 bytes_left = bss_entry->beacon_buf_size; 1222 1223 /* Process variable IE */ 1224 while (bytes_left >= 2) { 1225 element_id = *current_ptr; 1226 element_len = *(current_ptr + 1); 1227 total_ie_len = element_len + sizeof(struct ieee_types_header); 1228 1229 if (bytes_left < total_ie_len) { 1230 mwifiex_dbg(adapter, ERROR, 1231 "err: InterpretIE: in processing\t" 1232 "IE, bytes left < IE length\n"); 1233 return -1; 1234 } 1235 switch (element_id) { 1236 case WLAN_EID_SSID: 1237 bss_entry->ssid.ssid_len = element_len; 1238 memcpy(bss_entry->ssid.ssid, (current_ptr + 2), 1239 element_len); 1240 mwifiex_dbg(adapter, INFO, 1241 "info: InterpretIE: ssid: %-32s\n", 1242 bss_entry->ssid.ssid); 1243 break; 1244 1245 case WLAN_EID_SUPP_RATES: 1246 memcpy(bss_entry->data_rates, current_ptr + 2, 1247 element_len); 1248 memcpy(bss_entry->supported_rates, current_ptr + 2, 1249 element_len); 1250 rate_size = element_len; 1251 found_data_rate_ie = true; 1252 break; 1253 1254 case WLAN_EID_FH_PARAMS: 1255 fh_param_set = 1256 (struct ieee_types_fh_param_set *) current_ptr; 1257 memcpy(&bss_entry->phy_param_set.fh_param_set, 1258 fh_param_set, 1259 sizeof(struct ieee_types_fh_param_set)); 1260 break; 1261 1262 case WLAN_EID_DS_PARAMS: 1263 ds_param_set = 1264 (struct ieee_types_ds_param_set *) current_ptr; 1265 1266 bss_entry->channel = ds_param_set->current_chan; 1267 1268 memcpy(&bss_entry->phy_param_set.ds_param_set, 1269 ds_param_set, 1270 sizeof(struct ieee_types_ds_param_set)); 1271 break; 1272 1273 case WLAN_EID_CF_PARAMS: 1274 cf_param_set = 1275 (struct ieee_types_cf_param_set *) current_ptr; 1276 memcpy(&bss_entry->ss_param_set.cf_param_set, 1277 cf_param_set, 1278 sizeof(struct ieee_types_cf_param_set)); 1279 break; 1280 1281 case WLAN_EID_IBSS_PARAMS: 1282 ibss_param_set = 1283 (struct ieee_types_ibss_param_set *) 1284 current_ptr; 1285 memcpy(&bss_entry->ss_param_set.ibss_param_set, 1286 ibss_param_set, 1287 sizeof(struct ieee_types_ibss_param_set)); 1288 break; 1289 1290 case WLAN_EID_ERP_INFO: 1291 bss_entry->erp_flags = *(current_ptr + 2); 1292 break; 1293 1294 case WLAN_EID_PWR_CONSTRAINT: 1295 bss_entry->local_constraint = *(current_ptr + 2); 1296 bss_entry->sensed_11h = true; 1297 break; 1298 1299 case WLAN_EID_CHANNEL_SWITCH: 1300 bss_entry->chan_sw_ie_present = true; 1301 case WLAN_EID_PWR_CAPABILITY: 1302 case WLAN_EID_TPC_REPORT: 1303 case WLAN_EID_QUIET: 1304 bss_entry->sensed_11h = true; 1305 break; 1306 1307 case WLAN_EID_EXT_SUPP_RATES: 1308 /* 1309 * Only process extended supported rate 1310 * if data rate is already found. 1311 * Data rate IE should come before 1312 * extended supported rate IE 1313 */ 1314 if (found_data_rate_ie) { 1315 if ((element_len + rate_size) > 1316 MWIFIEX_SUPPORTED_RATES) 1317 bytes_to_copy = 1318 (MWIFIEX_SUPPORTED_RATES - 1319 rate_size); 1320 else 1321 bytes_to_copy = element_len; 1322 1323 rate = (u8 *) bss_entry->data_rates; 1324 rate += rate_size; 1325 memcpy(rate, current_ptr + 2, bytes_to_copy); 1326 1327 rate = (u8 *) bss_entry->supported_rates; 1328 rate += rate_size; 1329 memcpy(rate, current_ptr + 2, bytes_to_copy); 1330 } 1331 break; 1332 1333 case WLAN_EID_VENDOR_SPECIFIC: 1334 vendor_ie = (struct ieee_types_vendor_specific *) 1335 current_ptr; 1336 1337 if (!memcmp 1338 (vendor_ie->vend_hdr.oui, wpa_oui, 1339 sizeof(wpa_oui))) { 1340 bss_entry->bcn_wpa_ie = 1341 (struct ieee_types_vendor_specific *) 1342 current_ptr; 1343 bss_entry->wpa_offset = (u16) 1344 (current_ptr - bss_entry->beacon_buf); 1345 } else if (!memcmp(vendor_ie->vend_hdr.oui, wmm_oui, 1346 sizeof(wmm_oui))) { 1347 if (total_ie_len == 1348 sizeof(struct ieee_types_wmm_parameter) || 1349 total_ie_len == 1350 sizeof(struct ieee_types_wmm_info)) 1351 /* 1352 * Only accept and copy the WMM IE if 1353 * it matches the size expected for the 1354 * WMM Info IE or the WMM Parameter IE. 1355 */ 1356 memcpy((u8 *) &bss_entry->wmm_ie, 1357 current_ptr, total_ie_len); 1358 } 1359 break; 1360 case WLAN_EID_RSN: 1361 bss_entry->bcn_rsn_ie = 1362 (struct ieee_types_generic *) current_ptr; 1363 bss_entry->rsn_offset = (u16) (current_ptr - 1364 bss_entry->beacon_buf); 1365 break; 1366 case WLAN_EID_BSS_AC_ACCESS_DELAY: 1367 bss_entry->bcn_wapi_ie = 1368 (struct ieee_types_generic *) current_ptr; 1369 bss_entry->wapi_offset = (u16) (current_ptr - 1370 bss_entry->beacon_buf); 1371 break; 1372 case WLAN_EID_HT_CAPABILITY: 1373 bss_entry->bcn_ht_cap = (struct ieee80211_ht_cap *) 1374 (current_ptr + 1375 sizeof(struct ieee_types_header)); 1376 bss_entry->ht_cap_offset = (u16) (current_ptr + 1377 sizeof(struct ieee_types_header) - 1378 bss_entry->beacon_buf); 1379 break; 1380 case WLAN_EID_HT_OPERATION: 1381 bss_entry->bcn_ht_oper = 1382 (struct ieee80211_ht_operation *)(current_ptr + 1383 sizeof(struct ieee_types_header)); 1384 bss_entry->ht_info_offset = (u16) (current_ptr + 1385 sizeof(struct ieee_types_header) - 1386 bss_entry->beacon_buf); 1387 break; 1388 case WLAN_EID_VHT_CAPABILITY: 1389 bss_entry->disable_11ac = false; 1390 bss_entry->bcn_vht_cap = 1391 (void *)(current_ptr + 1392 sizeof(struct ieee_types_header)); 1393 bss_entry->vht_cap_offset = 1394 (u16)((u8 *)bss_entry->bcn_vht_cap - 1395 bss_entry->beacon_buf); 1396 break; 1397 case WLAN_EID_VHT_OPERATION: 1398 bss_entry->bcn_vht_oper = 1399 (void *)(current_ptr + 1400 sizeof(struct ieee_types_header)); 1401 bss_entry->vht_info_offset = 1402 (u16)((u8 *)bss_entry->bcn_vht_oper - 1403 bss_entry->beacon_buf); 1404 break; 1405 case WLAN_EID_BSS_COEX_2040: 1406 bss_entry->bcn_bss_co_2040 = current_ptr; 1407 bss_entry->bss_co_2040_offset = 1408 (u16) (current_ptr - bss_entry->beacon_buf); 1409 break; 1410 case WLAN_EID_EXT_CAPABILITY: 1411 bss_entry->bcn_ext_cap = current_ptr; 1412 bss_entry->ext_cap_offset = 1413 (u16) (current_ptr - bss_entry->beacon_buf); 1414 break; 1415 case WLAN_EID_OPMODE_NOTIF: 1416 bss_entry->oper_mode = (void *)current_ptr; 1417 bss_entry->oper_mode_offset = 1418 (u16)((u8 *)bss_entry->oper_mode - 1419 bss_entry->beacon_buf); 1420 break; 1421 default: 1422 break; 1423 } 1424 1425 current_ptr += element_len + 2; 1426 1427 /* Need to account for IE ID and IE Len */ 1428 bytes_left -= (element_len + 2); 1429 1430 } /* while (bytes_left > 2) */ 1431 return ret; 1432 } 1433 1434 /* 1435 * This function converts radio type scan parameter to a band configuration 1436 * to be used in join command. 1437 */ 1438 static u8 1439 mwifiex_radio_type_to_band(u8 radio_type) 1440 { 1441 switch (radio_type) { 1442 case HostCmd_SCAN_RADIO_TYPE_A: 1443 return BAND_A; 1444 case HostCmd_SCAN_RADIO_TYPE_BG: 1445 default: 1446 return BAND_G; 1447 } 1448 } 1449 1450 /* 1451 * This is an internal function used to start a scan based on an input 1452 * configuration. 1453 * 1454 * This uses the input user scan configuration information when provided in 1455 * order to send the appropriate scan commands to firmware to populate or 1456 * update the internal driver scan table. 1457 */ 1458 int mwifiex_scan_networks(struct mwifiex_private *priv, 1459 const struct mwifiex_user_scan_cfg *user_scan_in) 1460 { 1461 int ret; 1462 struct mwifiex_adapter *adapter = priv->adapter; 1463 struct cmd_ctrl_node *cmd_node; 1464 union mwifiex_scan_cmd_config_tlv *scan_cfg_out; 1465 struct mwifiex_ie_types_chan_list_param_set *chan_list_out; 1466 struct mwifiex_chan_scan_param_set *scan_chan_list; 1467 u8 filtered_scan; 1468 u8 scan_current_chan_only; 1469 u8 max_chan_per_scan; 1470 unsigned long flags; 1471 1472 if (adapter->scan_processing) { 1473 mwifiex_dbg(adapter, WARN, 1474 "cmd: Scan already in process...\n"); 1475 return -EBUSY; 1476 } 1477 1478 if (priv->scan_block) { 1479 mwifiex_dbg(adapter, WARN, 1480 "cmd: Scan is blocked during association...\n"); 1481 return -EBUSY; 1482 } 1483 1484 if (adapter->surprise_removed || adapter->is_cmd_timedout) { 1485 mwifiex_dbg(adapter, ERROR, 1486 "Ignore scan. Card removed or firmware in bad state\n"); 1487 return -EFAULT; 1488 } 1489 1490 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags); 1491 adapter->scan_processing = true; 1492 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags); 1493 1494 scan_cfg_out = kzalloc(sizeof(union mwifiex_scan_cmd_config_tlv), 1495 GFP_KERNEL); 1496 if (!scan_cfg_out) { 1497 ret = -ENOMEM; 1498 goto done; 1499 } 1500 1501 scan_chan_list = kcalloc(MWIFIEX_USER_SCAN_CHAN_MAX, 1502 sizeof(struct mwifiex_chan_scan_param_set), 1503 GFP_KERNEL); 1504 if (!scan_chan_list) { 1505 kfree(scan_cfg_out); 1506 ret = -ENOMEM; 1507 goto done; 1508 } 1509 1510 mwifiex_config_scan(priv, user_scan_in, &scan_cfg_out->config, 1511 &chan_list_out, scan_chan_list, &max_chan_per_scan, 1512 &filtered_scan, &scan_current_chan_only); 1513 1514 ret = mwifiex_scan_channel_list(priv, max_chan_per_scan, filtered_scan, 1515 &scan_cfg_out->config, chan_list_out, 1516 scan_chan_list); 1517 1518 /* Get scan command from scan_pending_q and put to cmd_pending_q */ 1519 if (!ret) { 1520 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags); 1521 if (!list_empty(&adapter->scan_pending_q)) { 1522 cmd_node = list_first_entry(&adapter->scan_pending_q, 1523 struct cmd_ctrl_node, list); 1524 list_del(&cmd_node->list); 1525 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, 1526 flags); 1527 mwifiex_insert_cmd_to_pending_q(adapter, cmd_node, 1528 true); 1529 queue_work(adapter->workqueue, &adapter->main_work); 1530 1531 /* Perform internal scan synchronously */ 1532 if (!priv->scan_request) { 1533 mwifiex_dbg(adapter, INFO, 1534 "wait internal scan\n"); 1535 mwifiex_wait_queue_complete(adapter, cmd_node); 1536 } 1537 } else { 1538 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, 1539 flags); 1540 } 1541 } 1542 1543 kfree(scan_cfg_out); 1544 kfree(scan_chan_list); 1545 done: 1546 if (ret) { 1547 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags); 1548 adapter->scan_processing = false; 1549 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags); 1550 } 1551 return ret; 1552 } 1553 1554 /* 1555 * This function prepares a scan command to be sent to the firmware. 1556 * 1557 * This uses the scan command configuration sent to the command processing 1558 * module in command preparation stage to configure a scan command structure 1559 * to send to firmware. 1560 * 1561 * The fixed fields specifying the BSS type and BSSID filters as well as a 1562 * variable number/length of TLVs are sent in the command to firmware. 1563 * 1564 * Preparation also includes - 1565 * - Setting command ID, and proper size 1566 * - Ensuring correct endian-ness 1567 */ 1568 int mwifiex_cmd_802_11_scan(struct host_cmd_ds_command *cmd, 1569 struct mwifiex_scan_cmd_config *scan_cfg) 1570 { 1571 struct host_cmd_ds_802_11_scan *scan_cmd = &cmd->params.scan; 1572 1573 /* Set fixed field variables in scan command */ 1574 scan_cmd->bss_mode = scan_cfg->bss_mode; 1575 memcpy(scan_cmd->bssid, scan_cfg->specific_bssid, 1576 sizeof(scan_cmd->bssid)); 1577 memcpy(scan_cmd->tlv_buffer, scan_cfg->tlv_buf, scan_cfg->tlv_buf_len); 1578 1579 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_SCAN); 1580 1581 /* Size is equal to the sizeof(fixed portions) + the TLV len + header */ 1582 cmd->size = cpu_to_le16((u16) (sizeof(scan_cmd->bss_mode) 1583 + sizeof(scan_cmd->bssid) 1584 + scan_cfg->tlv_buf_len + S_DS_GEN)); 1585 1586 return 0; 1587 } 1588 1589 /* 1590 * This function checks compatibility of requested network with current 1591 * driver settings. 1592 */ 1593 int mwifiex_check_network_compatibility(struct mwifiex_private *priv, 1594 struct mwifiex_bssdescriptor *bss_desc) 1595 { 1596 int ret = -1; 1597 1598 if (!bss_desc) 1599 return -1; 1600 1601 if ((mwifiex_get_cfp(priv, (u8) bss_desc->bss_band, 1602 (u16) bss_desc->channel, 0))) { 1603 switch (priv->bss_mode) { 1604 case NL80211_IFTYPE_STATION: 1605 case NL80211_IFTYPE_ADHOC: 1606 ret = mwifiex_is_network_compatible(priv, bss_desc, 1607 priv->bss_mode); 1608 if (ret) 1609 mwifiex_dbg(priv->adapter, ERROR, 1610 "Incompatible network settings\n"); 1611 break; 1612 default: 1613 ret = 0; 1614 } 1615 } 1616 1617 return ret; 1618 } 1619 1620 /* This function checks if SSID string contains all zeroes or length is zero */ 1621 static bool mwifiex_is_hidden_ssid(struct cfg80211_ssid *ssid) 1622 { 1623 int idx; 1624 1625 for (idx = 0; idx < ssid->ssid_len; idx++) { 1626 if (ssid->ssid[idx]) 1627 return false; 1628 } 1629 1630 return true; 1631 } 1632 1633 /* This function checks if any hidden SSID found in passive scan channels 1634 * and save those channels for specific SSID active scan 1635 */ 1636 static int mwifiex_save_hidden_ssid_channels(struct mwifiex_private *priv, 1637 struct cfg80211_bss *bss) 1638 { 1639 struct mwifiex_bssdescriptor *bss_desc; 1640 int ret; 1641 int chid; 1642 1643 /* Allocate and fill new bss descriptor */ 1644 bss_desc = kzalloc(sizeof(*bss_desc), GFP_KERNEL); 1645 if (!bss_desc) 1646 return -ENOMEM; 1647 1648 ret = mwifiex_fill_new_bss_desc(priv, bss, bss_desc); 1649 if (ret) 1650 goto done; 1651 1652 if (mwifiex_is_hidden_ssid(&bss_desc->ssid)) { 1653 mwifiex_dbg(priv->adapter, INFO, "found hidden SSID\n"); 1654 for (chid = 0 ; chid < MWIFIEX_USER_SCAN_CHAN_MAX; chid++) { 1655 if (priv->hidden_chan[chid].chan_number == 1656 bss->channel->hw_value) 1657 break; 1658 1659 if (!priv->hidden_chan[chid].chan_number) { 1660 priv->hidden_chan[chid].chan_number = 1661 bss->channel->hw_value; 1662 priv->hidden_chan[chid].radio_type = 1663 bss->channel->band; 1664 priv->hidden_chan[chid].scan_type = 1665 MWIFIEX_SCAN_TYPE_ACTIVE; 1666 break; 1667 } 1668 } 1669 } 1670 1671 done: 1672 /* beacon_ie buffer was allocated in function 1673 * mwifiex_fill_new_bss_desc(). Free it now. 1674 */ 1675 kfree(bss_desc->beacon_buf); 1676 kfree(bss_desc); 1677 return 0; 1678 } 1679 1680 static int mwifiex_update_curr_bss_params(struct mwifiex_private *priv, 1681 struct cfg80211_bss *bss) 1682 { 1683 struct mwifiex_bssdescriptor *bss_desc; 1684 int ret; 1685 unsigned long flags; 1686 1687 /* Allocate and fill new bss descriptor */ 1688 bss_desc = kzalloc(sizeof(struct mwifiex_bssdescriptor), GFP_KERNEL); 1689 if (!bss_desc) 1690 return -ENOMEM; 1691 1692 ret = mwifiex_fill_new_bss_desc(priv, bss, bss_desc); 1693 if (ret) 1694 goto done; 1695 1696 ret = mwifiex_check_network_compatibility(priv, bss_desc); 1697 if (ret) 1698 goto done; 1699 1700 spin_lock_irqsave(&priv->curr_bcn_buf_lock, flags); 1701 /* Make a copy of current BSSID descriptor */ 1702 memcpy(&priv->curr_bss_params.bss_descriptor, bss_desc, 1703 sizeof(priv->curr_bss_params.bss_descriptor)); 1704 1705 /* The contents of beacon_ie will be copied to its own buffer 1706 * in mwifiex_save_curr_bcn() 1707 */ 1708 mwifiex_save_curr_bcn(priv); 1709 spin_unlock_irqrestore(&priv->curr_bcn_buf_lock, flags); 1710 1711 done: 1712 /* beacon_ie buffer was allocated in function 1713 * mwifiex_fill_new_bss_desc(). Free it now. 1714 */ 1715 kfree(bss_desc->beacon_buf); 1716 kfree(bss_desc); 1717 return 0; 1718 } 1719 1720 static int 1721 mwifiex_parse_single_response_buf(struct mwifiex_private *priv, u8 **bss_info, 1722 u32 *bytes_left, u64 fw_tsf, u8 *radio_type, 1723 bool ext_scan, s32 rssi_val) 1724 { 1725 struct mwifiex_adapter *adapter = priv->adapter; 1726 struct mwifiex_chan_freq_power *cfp; 1727 struct cfg80211_bss *bss; 1728 u8 bssid[ETH_ALEN]; 1729 s32 rssi; 1730 const u8 *ie_buf; 1731 size_t ie_len; 1732 u16 channel = 0; 1733 u16 beacon_size = 0; 1734 u32 curr_bcn_bytes; 1735 u32 freq; 1736 u16 beacon_period; 1737 u16 cap_info_bitmap; 1738 u8 *current_ptr; 1739 u64 timestamp; 1740 struct mwifiex_fixed_bcn_param *bcn_param; 1741 struct mwifiex_bss_priv *bss_priv; 1742 1743 if (*bytes_left >= sizeof(beacon_size)) { 1744 /* Extract & convert beacon size from command buffer */ 1745 beacon_size = le16_to_cpu(*(__le16 *)(*bss_info)); 1746 *bytes_left -= sizeof(beacon_size); 1747 *bss_info += sizeof(beacon_size); 1748 } 1749 1750 if (!beacon_size || beacon_size > *bytes_left) { 1751 *bss_info += *bytes_left; 1752 *bytes_left = 0; 1753 return -EFAULT; 1754 } 1755 1756 /* Initialize the current working beacon pointer for this BSS 1757 * iteration 1758 */ 1759 current_ptr = *bss_info; 1760 1761 /* Advance the return beacon pointer past the current beacon */ 1762 *bss_info += beacon_size; 1763 *bytes_left -= beacon_size; 1764 1765 curr_bcn_bytes = beacon_size; 1766 1767 /* First 5 fields are bssid, RSSI(for legacy scan only), 1768 * time stamp, beacon interval, and capability information 1769 */ 1770 if (curr_bcn_bytes < ETH_ALEN + sizeof(u8) + 1771 sizeof(struct mwifiex_fixed_bcn_param)) { 1772 mwifiex_dbg(adapter, ERROR, 1773 "InterpretIE: not enough bytes left\n"); 1774 return -EFAULT; 1775 } 1776 1777 memcpy(bssid, current_ptr, ETH_ALEN); 1778 current_ptr += ETH_ALEN; 1779 curr_bcn_bytes -= ETH_ALEN; 1780 1781 if (!ext_scan) { 1782 rssi = (s32) *current_ptr; 1783 rssi = (-rssi) * 100; /* Convert dBm to mBm */ 1784 current_ptr += sizeof(u8); 1785 curr_bcn_bytes -= sizeof(u8); 1786 mwifiex_dbg(adapter, INFO, 1787 "info: InterpretIE: RSSI=%d\n", rssi); 1788 } else { 1789 rssi = rssi_val; 1790 } 1791 1792 bcn_param = (struct mwifiex_fixed_bcn_param *)current_ptr; 1793 current_ptr += sizeof(*bcn_param); 1794 curr_bcn_bytes -= sizeof(*bcn_param); 1795 1796 timestamp = le64_to_cpu(bcn_param->timestamp); 1797 beacon_period = le16_to_cpu(bcn_param->beacon_period); 1798 1799 cap_info_bitmap = le16_to_cpu(bcn_param->cap_info_bitmap); 1800 mwifiex_dbg(adapter, INFO, 1801 "info: InterpretIE: capabilities=0x%X\n", 1802 cap_info_bitmap); 1803 1804 /* Rest of the current buffer are IE's */ 1805 ie_buf = current_ptr; 1806 ie_len = curr_bcn_bytes; 1807 mwifiex_dbg(adapter, INFO, 1808 "info: InterpretIE: IELength for this AP = %d\n", 1809 curr_bcn_bytes); 1810 1811 while (curr_bcn_bytes >= sizeof(struct ieee_types_header)) { 1812 u8 element_id, element_len; 1813 1814 element_id = *current_ptr; 1815 element_len = *(current_ptr + 1); 1816 if (curr_bcn_bytes < element_len + 1817 sizeof(struct ieee_types_header)) { 1818 mwifiex_dbg(adapter, ERROR, 1819 "%s: bytes left < IE length\n", __func__); 1820 return -EFAULT; 1821 } 1822 if (element_id == WLAN_EID_DS_PARAMS) { 1823 channel = *(current_ptr + 1824 sizeof(struct ieee_types_header)); 1825 break; 1826 } 1827 1828 current_ptr += element_len + sizeof(struct ieee_types_header); 1829 curr_bcn_bytes -= element_len + 1830 sizeof(struct ieee_types_header); 1831 } 1832 1833 if (channel) { 1834 struct ieee80211_channel *chan; 1835 u8 band; 1836 1837 /* Skip entry if on csa closed channel */ 1838 if (channel == priv->csa_chan) { 1839 mwifiex_dbg(adapter, WARN, 1840 "Dropping entry on csa closed channel\n"); 1841 return 0; 1842 } 1843 1844 band = BAND_G; 1845 if (radio_type) 1846 band = mwifiex_radio_type_to_band(*radio_type & 1847 (BIT(0) | BIT(1))); 1848 1849 cfp = mwifiex_get_cfp(priv, band, channel, 0); 1850 1851 freq = cfp ? cfp->freq : 0; 1852 1853 chan = ieee80211_get_channel(priv->wdev.wiphy, freq); 1854 1855 if (chan && !(chan->flags & IEEE80211_CHAN_DISABLED)) { 1856 bss = cfg80211_inform_bss(priv->wdev.wiphy, 1857 chan, CFG80211_BSS_FTYPE_UNKNOWN, 1858 bssid, timestamp, 1859 cap_info_bitmap, beacon_period, 1860 ie_buf, ie_len, rssi, GFP_KERNEL); 1861 if (bss) { 1862 bss_priv = (struct mwifiex_bss_priv *)bss->priv; 1863 bss_priv->band = band; 1864 bss_priv->fw_tsf = fw_tsf; 1865 if (priv->media_connected && 1866 !memcmp(bssid, priv->curr_bss_params. 1867 bss_descriptor.mac_address, 1868 ETH_ALEN)) 1869 mwifiex_update_curr_bss_params(priv, 1870 bss); 1871 cfg80211_put_bss(priv->wdev.wiphy, bss); 1872 } 1873 1874 if ((chan->flags & IEEE80211_CHAN_RADAR) || 1875 (chan->flags & IEEE80211_CHAN_NO_IR)) { 1876 mwifiex_dbg(adapter, INFO, 1877 "radar or passive channel %d\n", 1878 channel); 1879 mwifiex_save_hidden_ssid_channels(priv, bss); 1880 } 1881 } 1882 } else { 1883 mwifiex_dbg(adapter, WARN, "missing BSS channel IE\n"); 1884 } 1885 1886 return 0; 1887 } 1888 1889 static void mwifiex_complete_scan(struct mwifiex_private *priv) 1890 { 1891 struct mwifiex_adapter *adapter = priv->adapter; 1892 1893 adapter->survey_idx = 0; 1894 if (adapter->curr_cmd->wait_q_enabled) { 1895 adapter->cmd_wait_q.status = 0; 1896 if (!priv->scan_request) { 1897 mwifiex_dbg(adapter, INFO, 1898 "complete internal scan\n"); 1899 mwifiex_complete_cmd(adapter, adapter->curr_cmd); 1900 } 1901 } 1902 } 1903 1904 /* This function checks if any hidden SSID found in passive scan channels 1905 * and do specific SSID active scan for those channels 1906 */ 1907 static int 1908 mwifiex_active_scan_req_for_passive_chan(struct mwifiex_private *priv) 1909 { 1910 int ret; 1911 struct mwifiex_adapter *adapter = priv->adapter; 1912 u8 id = 0; 1913 struct mwifiex_user_scan_cfg *user_scan_cfg; 1914 1915 if (adapter->active_scan_triggered || !priv->scan_request || 1916 priv->scan_aborting) { 1917 adapter->active_scan_triggered = false; 1918 return 0; 1919 } 1920 1921 if (!priv->hidden_chan[0].chan_number) { 1922 mwifiex_dbg(adapter, INFO, "No BSS with hidden SSID found on DFS channels\n"); 1923 return 0; 1924 } 1925 user_scan_cfg = kzalloc(sizeof(*user_scan_cfg), GFP_KERNEL); 1926 1927 if (!user_scan_cfg) 1928 return -ENOMEM; 1929 1930 memset(user_scan_cfg, 0, sizeof(*user_scan_cfg)); 1931 1932 for (id = 0; id < MWIFIEX_USER_SCAN_CHAN_MAX; id++) { 1933 if (!priv->hidden_chan[id].chan_number) 1934 break; 1935 memcpy(&user_scan_cfg->chan_list[id], 1936 &priv->hidden_chan[id], 1937 sizeof(struct mwifiex_user_scan_chan)); 1938 } 1939 1940 adapter->active_scan_triggered = true; 1941 ether_addr_copy(user_scan_cfg->random_mac, priv->random_mac); 1942 user_scan_cfg->num_ssids = priv->scan_request->n_ssids; 1943 user_scan_cfg->ssid_list = priv->scan_request->ssids; 1944 1945 ret = mwifiex_scan_networks(priv, user_scan_cfg); 1946 kfree(user_scan_cfg); 1947 1948 memset(&priv->hidden_chan, 0, sizeof(priv->hidden_chan)); 1949 1950 if (ret) { 1951 dev_err(priv->adapter->dev, "scan failed: %d\n", ret); 1952 return ret; 1953 } 1954 1955 return 0; 1956 } 1957 static void mwifiex_check_next_scan_command(struct mwifiex_private *priv) 1958 { 1959 struct mwifiex_adapter *adapter = priv->adapter; 1960 struct cmd_ctrl_node *cmd_node; 1961 unsigned long flags; 1962 1963 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags); 1964 if (list_empty(&adapter->scan_pending_q)) { 1965 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags); 1966 1967 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags); 1968 adapter->scan_processing = false; 1969 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags); 1970 1971 mwifiex_active_scan_req_for_passive_chan(priv); 1972 1973 if (!adapter->ext_scan) 1974 mwifiex_complete_scan(priv); 1975 1976 if (priv->scan_request) { 1977 struct cfg80211_scan_info info = { 1978 .aborted = false, 1979 }; 1980 1981 mwifiex_dbg(adapter, INFO, 1982 "info: notifying scan done\n"); 1983 cfg80211_scan_done(priv->scan_request, &info); 1984 priv->scan_request = NULL; 1985 priv->scan_aborting = false; 1986 } else { 1987 priv->scan_aborting = false; 1988 mwifiex_dbg(adapter, INFO, 1989 "info: scan already aborted\n"); 1990 } 1991 } else if ((priv->scan_aborting && !priv->scan_request) || 1992 priv->scan_block) { 1993 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags); 1994 1995 mwifiex_cancel_pending_scan_cmd(adapter); 1996 1997 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags); 1998 adapter->scan_processing = false; 1999 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags); 2000 2001 if (!adapter->active_scan_triggered) { 2002 if (priv->scan_request) { 2003 struct cfg80211_scan_info info = { 2004 .aborted = true, 2005 }; 2006 2007 mwifiex_dbg(adapter, INFO, 2008 "info: aborting scan\n"); 2009 cfg80211_scan_done(priv->scan_request, &info); 2010 priv->scan_request = NULL; 2011 priv->scan_aborting = false; 2012 } else { 2013 priv->scan_aborting = false; 2014 mwifiex_dbg(adapter, INFO, 2015 "info: scan already aborted\n"); 2016 } 2017 } 2018 } else { 2019 /* Get scan command from scan_pending_q and put to 2020 * cmd_pending_q 2021 */ 2022 cmd_node = list_first_entry(&adapter->scan_pending_q, 2023 struct cmd_ctrl_node, list); 2024 list_del(&cmd_node->list); 2025 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags); 2026 mwifiex_insert_cmd_to_pending_q(adapter, cmd_node, true); 2027 } 2028 2029 return; 2030 } 2031 2032 void mwifiex_cancel_scan(struct mwifiex_adapter *adapter) 2033 { 2034 struct mwifiex_private *priv; 2035 unsigned long cmd_flags; 2036 int i; 2037 2038 mwifiex_cancel_pending_scan_cmd(adapter); 2039 2040 if (adapter->scan_processing) { 2041 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, cmd_flags); 2042 adapter->scan_processing = false; 2043 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, cmd_flags); 2044 for (i = 0; i < adapter->priv_num; i++) { 2045 priv = adapter->priv[i]; 2046 if (!priv) 2047 continue; 2048 if (priv->scan_request) { 2049 struct cfg80211_scan_info info = { 2050 .aborted = true, 2051 }; 2052 2053 mwifiex_dbg(adapter, INFO, 2054 "info: aborting scan\n"); 2055 cfg80211_scan_done(priv->scan_request, &info); 2056 priv->scan_request = NULL; 2057 priv->scan_aborting = false; 2058 } 2059 } 2060 } 2061 } 2062 2063 /* 2064 * This function handles the command response of scan. 2065 * 2066 * The response buffer for the scan command has the following 2067 * memory layout: 2068 * 2069 * .-------------------------------------------------------------. 2070 * | Header (4 * sizeof(t_u16)): Standard command response hdr | 2071 * .-------------------------------------------------------------. 2072 * | BufSize (t_u16) : sizeof the BSS Description data | 2073 * .-------------------------------------------------------------. 2074 * | NumOfSet (t_u8) : Number of BSS Descs returned | 2075 * .-------------------------------------------------------------. 2076 * | BSSDescription data (variable, size given in BufSize) | 2077 * .-------------------------------------------------------------. 2078 * | TLV data (variable, size calculated using Header->Size, | 2079 * | BufSize and sizeof the fixed fields above) | 2080 * .-------------------------------------------------------------. 2081 */ 2082 int mwifiex_ret_802_11_scan(struct mwifiex_private *priv, 2083 struct host_cmd_ds_command *resp) 2084 { 2085 int ret = 0; 2086 struct mwifiex_adapter *adapter = priv->adapter; 2087 struct host_cmd_ds_802_11_scan_rsp *scan_rsp; 2088 struct mwifiex_ie_types_data *tlv_data; 2089 struct mwifiex_ie_types_tsf_timestamp *tsf_tlv; 2090 u8 *bss_info; 2091 u32 scan_resp_size; 2092 u32 bytes_left; 2093 u32 idx; 2094 u32 tlv_buf_size; 2095 struct mwifiex_ie_types_chan_band_list_param_set *chan_band_tlv; 2096 struct chan_band_param_set *chan_band; 2097 u8 is_bgscan_resp; 2098 __le64 fw_tsf = 0; 2099 u8 *radio_type; 2100 struct cfg80211_wowlan_nd_match *pmatch; 2101 struct cfg80211_sched_scan_request *nd_config = NULL; 2102 2103 is_bgscan_resp = (le16_to_cpu(resp->command) 2104 == HostCmd_CMD_802_11_BG_SCAN_QUERY); 2105 if (is_bgscan_resp) 2106 scan_rsp = &resp->params.bg_scan_query_resp.scan_resp; 2107 else 2108 scan_rsp = &resp->params.scan_resp; 2109 2110 2111 if (scan_rsp->number_of_sets > MWIFIEX_MAX_AP) { 2112 mwifiex_dbg(adapter, ERROR, 2113 "SCAN_RESP: too many AP returned (%d)\n", 2114 scan_rsp->number_of_sets); 2115 ret = -1; 2116 goto check_next_scan; 2117 } 2118 2119 /* Check csa channel expiry before parsing scan response */ 2120 mwifiex_11h_get_csa_closed_channel(priv); 2121 2122 bytes_left = le16_to_cpu(scan_rsp->bss_descript_size); 2123 mwifiex_dbg(adapter, INFO, 2124 "info: SCAN_RESP: bss_descript_size %d\n", 2125 bytes_left); 2126 2127 scan_resp_size = le16_to_cpu(resp->size); 2128 2129 mwifiex_dbg(adapter, INFO, 2130 "info: SCAN_RESP: returned %d APs before parsing\n", 2131 scan_rsp->number_of_sets); 2132 2133 bss_info = scan_rsp->bss_desc_and_tlv_buffer; 2134 2135 /* 2136 * The size of the TLV buffer is equal to the entire command response 2137 * size (scan_resp_size) minus the fixed fields (sizeof()'s), the 2138 * BSS Descriptions (bss_descript_size as bytesLef) and the command 2139 * response header (S_DS_GEN) 2140 */ 2141 tlv_buf_size = scan_resp_size - (bytes_left 2142 + sizeof(scan_rsp->bss_descript_size) 2143 + sizeof(scan_rsp->number_of_sets) 2144 + S_DS_GEN); 2145 2146 tlv_data = (struct mwifiex_ie_types_data *) (scan_rsp-> 2147 bss_desc_and_tlv_buffer + 2148 bytes_left); 2149 2150 /* Search the TLV buffer space in the scan response for any valid 2151 TLVs */ 2152 mwifiex_ret_802_11_scan_get_tlv_ptrs(adapter, tlv_data, tlv_buf_size, 2153 TLV_TYPE_TSFTIMESTAMP, 2154 (struct mwifiex_ie_types_data **) 2155 &tsf_tlv); 2156 2157 /* Search the TLV buffer space in the scan response for any valid 2158 TLVs */ 2159 mwifiex_ret_802_11_scan_get_tlv_ptrs(adapter, tlv_data, tlv_buf_size, 2160 TLV_TYPE_CHANNELBANDLIST, 2161 (struct mwifiex_ie_types_data **) 2162 &chan_band_tlv); 2163 2164 #ifdef CONFIG_PM 2165 if (priv->wdev.wiphy->wowlan_config) 2166 nd_config = priv->wdev.wiphy->wowlan_config->nd_config; 2167 #endif 2168 2169 if (nd_config) { 2170 adapter->nd_info = 2171 kzalloc(sizeof(struct cfg80211_wowlan_nd_match) + 2172 sizeof(struct cfg80211_wowlan_nd_match *) * 2173 scan_rsp->number_of_sets, GFP_ATOMIC); 2174 2175 if (adapter->nd_info) 2176 adapter->nd_info->n_matches = scan_rsp->number_of_sets; 2177 } 2178 2179 for (idx = 0; idx < scan_rsp->number_of_sets && bytes_left; idx++) { 2180 /* 2181 * If the TSF TLV was appended to the scan results, save this 2182 * entry's TSF value in the fw_tsf field. It is the firmware's 2183 * TSF value at the time the beacon or probe response was 2184 * received. 2185 */ 2186 if (tsf_tlv) 2187 memcpy(&fw_tsf, &tsf_tlv->tsf_data[idx * TSF_DATA_SIZE], 2188 sizeof(fw_tsf)); 2189 2190 if (chan_band_tlv) { 2191 chan_band = &chan_band_tlv->chan_band_param[idx]; 2192 radio_type = &chan_band->radio_type; 2193 } else { 2194 radio_type = NULL; 2195 } 2196 2197 if (chan_band_tlv && adapter->nd_info) { 2198 adapter->nd_info->matches[idx] = 2199 kzalloc(sizeof(*pmatch) + sizeof(u32), 2200 GFP_ATOMIC); 2201 2202 pmatch = adapter->nd_info->matches[idx]; 2203 2204 if (pmatch) { 2205 pmatch->n_channels = 1; 2206 pmatch->channels[0] = chan_band->chan_number; 2207 } 2208 } 2209 2210 ret = mwifiex_parse_single_response_buf(priv, &bss_info, 2211 &bytes_left, 2212 le64_to_cpu(fw_tsf), 2213 radio_type, false, 0); 2214 if (ret) 2215 goto check_next_scan; 2216 } 2217 2218 check_next_scan: 2219 mwifiex_check_next_scan_command(priv); 2220 return ret; 2221 } 2222 2223 /* 2224 * This function prepares an extended scan command to be sent to the firmware 2225 * 2226 * This uses the scan command configuration sent to the command processing 2227 * module in command preparation stage to configure a extended scan command 2228 * structure to send to firmware. 2229 */ 2230 int mwifiex_cmd_802_11_scan_ext(struct mwifiex_private *priv, 2231 struct host_cmd_ds_command *cmd, 2232 void *data_buf) 2233 { 2234 struct host_cmd_ds_802_11_scan_ext *ext_scan = &cmd->params.ext_scan; 2235 struct mwifiex_scan_cmd_config *scan_cfg = data_buf; 2236 2237 memcpy(ext_scan->tlv_buffer, scan_cfg->tlv_buf, scan_cfg->tlv_buf_len); 2238 2239 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_SCAN_EXT); 2240 2241 /* Size is equal to the sizeof(fixed portions) + the TLV len + header */ 2242 cmd->size = cpu_to_le16((u16)(sizeof(ext_scan->reserved) 2243 + scan_cfg->tlv_buf_len + S_DS_GEN)); 2244 2245 return 0; 2246 } 2247 2248 /* This function prepares an background scan config command to be sent 2249 * to the firmware 2250 */ 2251 int mwifiex_cmd_802_11_bg_scan_config(struct mwifiex_private *priv, 2252 struct host_cmd_ds_command *cmd, 2253 void *data_buf) 2254 { 2255 struct host_cmd_ds_802_11_bg_scan_config *bgscan_config = 2256 &cmd->params.bg_scan_config; 2257 struct mwifiex_bg_scan_cfg *bgscan_cfg_in = data_buf; 2258 u8 *tlv_pos = bgscan_config->tlv; 2259 u8 num_probes; 2260 u32 ssid_len, chan_idx, scan_type, scan_dur, chan_num; 2261 int i; 2262 struct mwifiex_ie_types_num_probes *num_probes_tlv; 2263 struct mwifiex_ie_types_repeat_count *repeat_count_tlv; 2264 struct mwifiex_ie_types_min_rssi_threshold *rssi_threshold_tlv; 2265 struct mwifiex_ie_types_bgscan_start_later *start_later_tlv; 2266 struct mwifiex_ie_types_wildcard_ssid_params *wildcard_ssid_tlv; 2267 struct mwifiex_ie_types_chan_list_param_set *chan_list_tlv; 2268 struct mwifiex_chan_scan_param_set *temp_chan; 2269 2270 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_BG_SCAN_CONFIG); 2271 cmd->size = cpu_to_le16(sizeof(*bgscan_config) + S_DS_GEN); 2272 2273 bgscan_config->action = cpu_to_le16(bgscan_cfg_in->action); 2274 bgscan_config->enable = bgscan_cfg_in->enable; 2275 bgscan_config->bss_type = bgscan_cfg_in->bss_type; 2276 bgscan_config->scan_interval = 2277 cpu_to_le32(bgscan_cfg_in->scan_interval); 2278 bgscan_config->report_condition = 2279 cpu_to_le32(bgscan_cfg_in->report_condition); 2280 2281 /* stop sched scan */ 2282 if (!bgscan_config->enable) 2283 return 0; 2284 2285 bgscan_config->chan_per_scan = bgscan_cfg_in->chan_per_scan; 2286 2287 num_probes = (bgscan_cfg_in->num_probes ? bgscan_cfg_in-> 2288 num_probes : priv->adapter->scan_probes); 2289 2290 if (num_probes) { 2291 num_probes_tlv = (struct mwifiex_ie_types_num_probes *)tlv_pos; 2292 num_probes_tlv->header.type = cpu_to_le16(TLV_TYPE_NUMPROBES); 2293 num_probes_tlv->header.len = 2294 cpu_to_le16(sizeof(num_probes_tlv->num_probes)); 2295 num_probes_tlv->num_probes = cpu_to_le16((u16)num_probes); 2296 2297 tlv_pos += sizeof(num_probes_tlv->header) + 2298 le16_to_cpu(num_probes_tlv->header.len); 2299 } 2300 2301 if (bgscan_cfg_in->repeat_count) { 2302 repeat_count_tlv = 2303 (struct mwifiex_ie_types_repeat_count *)tlv_pos; 2304 repeat_count_tlv->header.type = 2305 cpu_to_le16(TLV_TYPE_REPEAT_COUNT); 2306 repeat_count_tlv->header.len = 2307 cpu_to_le16(sizeof(repeat_count_tlv->repeat_count)); 2308 repeat_count_tlv->repeat_count = 2309 cpu_to_le16(bgscan_cfg_in->repeat_count); 2310 2311 tlv_pos += sizeof(repeat_count_tlv->header) + 2312 le16_to_cpu(repeat_count_tlv->header.len); 2313 } 2314 2315 if (bgscan_cfg_in->rssi_threshold) { 2316 rssi_threshold_tlv = 2317 (struct mwifiex_ie_types_min_rssi_threshold *)tlv_pos; 2318 rssi_threshold_tlv->header.type = 2319 cpu_to_le16(TLV_TYPE_RSSI_LOW); 2320 rssi_threshold_tlv->header.len = 2321 cpu_to_le16(sizeof(rssi_threshold_tlv->rssi_threshold)); 2322 rssi_threshold_tlv->rssi_threshold = 2323 cpu_to_le16(bgscan_cfg_in->rssi_threshold); 2324 2325 tlv_pos += sizeof(rssi_threshold_tlv->header) + 2326 le16_to_cpu(rssi_threshold_tlv->header.len); 2327 } 2328 2329 for (i = 0; i < bgscan_cfg_in->num_ssids; i++) { 2330 ssid_len = bgscan_cfg_in->ssid_list[i].ssid.ssid_len; 2331 2332 wildcard_ssid_tlv = 2333 (struct mwifiex_ie_types_wildcard_ssid_params *)tlv_pos; 2334 wildcard_ssid_tlv->header.type = 2335 cpu_to_le16(TLV_TYPE_WILDCARDSSID); 2336 wildcard_ssid_tlv->header.len = cpu_to_le16( 2337 (u16)(ssid_len + sizeof(wildcard_ssid_tlv-> 2338 max_ssid_length))); 2339 2340 /* max_ssid_length = 0 tells firmware to perform 2341 * specific scan for the SSID filled, whereas 2342 * max_ssid_length = IEEE80211_MAX_SSID_LEN is for 2343 * wildcard scan. 2344 */ 2345 if (ssid_len) 2346 wildcard_ssid_tlv->max_ssid_length = 0; 2347 else 2348 wildcard_ssid_tlv->max_ssid_length = 2349 IEEE80211_MAX_SSID_LEN; 2350 2351 memcpy(wildcard_ssid_tlv->ssid, 2352 bgscan_cfg_in->ssid_list[i].ssid.ssid, ssid_len); 2353 2354 tlv_pos += (sizeof(wildcard_ssid_tlv->header) 2355 + le16_to_cpu(wildcard_ssid_tlv->header.len)); 2356 } 2357 2358 chan_list_tlv = (struct mwifiex_ie_types_chan_list_param_set *)tlv_pos; 2359 2360 if (bgscan_cfg_in->chan_list[0].chan_number) { 2361 dev_dbg(priv->adapter->dev, "info: bgscan: Using supplied channel list\n"); 2362 2363 chan_list_tlv->header.type = cpu_to_le16(TLV_TYPE_CHANLIST); 2364 2365 for (chan_idx = 0; 2366 chan_idx < MWIFIEX_BG_SCAN_CHAN_MAX && 2367 bgscan_cfg_in->chan_list[chan_idx].chan_number; 2368 chan_idx++) { 2369 temp_chan = chan_list_tlv->chan_scan_param + chan_idx; 2370 2371 /* Increment the TLV header length by size appended */ 2372 le16_add_cpu(&chan_list_tlv->header.len, 2373 sizeof(chan_list_tlv->chan_scan_param)); 2374 2375 temp_chan->chan_number = 2376 bgscan_cfg_in->chan_list[chan_idx].chan_number; 2377 temp_chan->radio_type = 2378 bgscan_cfg_in->chan_list[chan_idx].radio_type; 2379 2380 scan_type = 2381 bgscan_cfg_in->chan_list[chan_idx].scan_type; 2382 2383 if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE) 2384 temp_chan->chan_scan_mode_bitmap 2385 |= MWIFIEX_PASSIVE_SCAN; 2386 else 2387 temp_chan->chan_scan_mode_bitmap 2388 &= ~MWIFIEX_PASSIVE_SCAN; 2389 2390 if (bgscan_cfg_in->chan_list[chan_idx].scan_time) { 2391 scan_dur = (u16)bgscan_cfg_in-> 2392 chan_list[chan_idx].scan_time; 2393 } else { 2394 scan_dur = (scan_type == 2395 MWIFIEX_SCAN_TYPE_PASSIVE) ? 2396 priv->adapter->passive_scan_time : 2397 priv->adapter->specific_scan_time; 2398 } 2399 2400 temp_chan->min_scan_time = cpu_to_le16(scan_dur); 2401 temp_chan->max_scan_time = cpu_to_le16(scan_dur); 2402 } 2403 } else { 2404 dev_dbg(priv->adapter->dev, 2405 "info: bgscan: Creating full region channel list\n"); 2406 chan_num = 2407 mwifiex_bgscan_create_channel_list(priv, bgscan_cfg_in, 2408 chan_list_tlv-> 2409 chan_scan_param); 2410 le16_add_cpu(&chan_list_tlv->header.len, 2411 chan_num * 2412 sizeof(chan_list_tlv->chan_scan_param[0])); 2413 } 2414 2415 tlv_pos += (sizeof(chan_list_tlv->header) 2416 + le16_to_cpu(chan_list_tlv->header.len)); 2417 2418 if (bgscan_cfg_in->start_later) { 2419 start_later_tlv = 2420 (struct mwifiex_ie_types_bgscan_start_later *)tlv_pos; 2421 start_later_tlv->header.type = 2422 cpu_to_le16(TLV_TYPE_BGSCAN_START_LATER); 2423 start_later_tlv->header.len = 2424 cpu_to_le16(sizeof(start_later_tlv->start_later)); 2425 start_later_tlv->start_later = 2426 cpu_to_le16(bgscan_cfg_in->start_later); 2427 2428 tlv_pos += sizeof(start_later_tlv->header) + 2429 le16_to_cpu(start_later_tlv->header.len); 2430 } 2431 2432 /* Append vendor specific IE TLV */ 2433 mwifiex_cmd_append_vsie_tlv(priv, MWIFIEX_VSIE_MASK_BGSCAN, &tlv_pos); 2434 2435 le16_add_cpu(&cmd->size, tlv_pos - bgscan_config->tlv); 2436 2437 return 0; 2438 } 2439 2440 int mwifiex_stop_bg_scan(struct mwifiex_private *priv) 2441 { 2442 struct mwifiex_bg_scan_cfg *bgscan_cfg; 2443 2444 if (!priv->sched_scanning) { 2445 dev_dbg(priv->adapter->dev, "bgscan already stopped!\n"); 2446 return 0; 2447 } 2448 2449 bgscan_cfg = kzalloc(sizeof(*bgscan_cfg), GFP_KERNEL); 2450 if (!bgscan_cfg) 2451 return -ENOMEM; 2452 2453 bgscan_cfg->bss_type = MWIFIEX_BSS_MODE_INFRA; 2454 bgscan_cfg->action = MWIFIEX_BGSCAN_ACT_SET; 2455 bgscan_cfg->enable = false; 2456 2457 if (mwifiex_send_cmd(priv, HostCmd_CMD_802_11_BG_SCAN_CONFIG, 2458 HostCmd_ACT_GEN_SET, 0, bgscan_cfg, true)) { 2459 kfree(bgscan_cfg); 2460 return -EFAULT; 2461 } 2462 2463 kfree(bgscan_cfg); 2464 priv->sched_scanning = false; 2465 2466 return 0; 2467 } 2468 2469 static void 2470 mwifiex_update_chan_statistics(struct mwifiex_private *priv, 2471 struct mwifiex_ietypes_chanstats *tlv_stat) 2472 { 2473 struct mwifiex_adapter *adapter = priv->adapter; 2474 u8 i, num_chan; 2475 struct mwifiex_fw_chan_stats *fw_chan_stats; 2476 struct mwifiex_chan_stats chan_stats; 2477 2478 fw_chan_stats = (void *)((u8 *)tlv_stat + 2479 sizeof(struct mwifiex_ie_types_header)); 2480 num_chan = le16_to_cpu(tlv_stat->header.len) / 2481 sizeof(struct mwifiex_chan_stats); 2482 2483 for (i = 0 ; i < num_chan; i++) { 2484 chan_stats.chan_num = fw_chan_stats->chan_num; 2485 chan_stats.bandcfg = fw_chan_stats->bandcfg; 2486 chan_stats.flags = fw_chan_stats->flags; 2487 chan_stats.noise = fw_chan_stats->noise; 2488 chan_stats.total_bss = le16_to_cpu(fw_chan_stats->total_bss); 2489 chan_stats.cca_scan_dur = 2490 le16_to_cpu(fw_chan_stats->cca_scan_dur); 2491 chan_stats.cca_busy_dur = 2492 le16_to_cpu(fw_chan_stats->cca_busy_dur); 2493 mwifiex_dbg(adapter, INFO, 2494 "chan=%d, noise=%d, total_network=%d scan_duration=%d, busy_duration=%d\n", 2495 chan_stats.chan_num, 2496 chan_stats.noise, 2497 chan_stats.total_bss, 2498 chan_stats.cca_scan_dur, 2499 chan_stats.cca_busy_dur); 2500 memcpy(&adapter->chan_stats[adapter->survey_idx++], &chan_stats, 2501 sizeof(struct mwifiex_chan_stats)); 2502 fw_chan_stats++; 2503 } 2504 } 2505 2506 /* This function handles the command response of extended scan */ 2507 int mwifiex_ret_802_11_scan_ext(struct mwifiex_private *priv, 2508 struct host_cmd_ds_command *resp) 2509 { 2510 struct mwifiex_adapter *adapter = priv->adapter; 2511 struct host_cmd_ds_802_11_scan_ext *ext_scan_resp; 2512 struct mwifiex_ie_types_header *tlv; 2513 struct mwifiex_ietypes_chanstats *tlv_stat; 2514 u16 buf_left, type, len; 2515 2516 struct host_cmd_ds_command *cmd_ptr; 2517 struct cmd_ctrl_node *cmd_node; 2518 unsigned long cmd_flags, scan_flags; 2519 bool complete_scan = false; 2520 2521 mwifiex_dbg(adapter, INFO, "info: EXT scan returns successfully\n"); 2522 2523 ext_scan_resp = &resp->params.ext_scan; 2524 2525 tlv = (void *)ext_scan_resp->tlv_buffer; 2526 buf_left = le16_to_cpu(resp->size) - (sizeof(*ext_scan_resp) + S_DS_GEN 2527 - 1); 2528 2529 while (buf_left >= sizeof(struct mwifiex_ie_types_header)) { 2530 type = le16_to_cpu(tlv->type); 2531 len = le16_to_cpu(tlv->len); 2532 2533 if (buf_left < (sizeof(struct mwifiex_ie_types_header) + len)) { 2534 mwifiex_dbg(adapter, ERROR, 2535 "error processing scan response TLVs"); 2536 break; 2537 } 2538 2539 switch (type) { 2540 case TLV_TYPE_CHANNEL_STATS: 2541 tlv_stat = (void *)tlv; 2542 mwifiex_update_chan_statistics(priv, tlv_stat); 2543 break; 2544 default: 2545 break; 2546 } 2547 2548 buf_left -= len + sizeof(struct mwifiex_ie_types_header); 2549 tlv = (void *)((u8 *)tlv + len + 2550 sizeof(struct mwifiex_ie_types_header)); 2551 } 2552 2553 spin_lock_irqsave(&adapter->cmd_pending_q_lock, cmd_flags); 2554 spin_lock_irqsave(&adapter->scan_pending_q_lock, scan_flags); 2555 if (list_empty(&adapter->scan_pending_q)) { 2556 complete_scan = true; 2557 list_for_each_entry(cmd_node, &adapter->cmd_pending_q, list) { 2558 cmd_ptr = (void *)cmd_node->cmd_skb->data; 2559 if (le16_to_cpu(cmd_ptr->command) == 2560 HostCmd_CMD_802_11_SCAN_EXT) { 2561 mwifiex_dbg(adapter, INFO, 2562 "Scan pending in command pending list"); 2563 complete_scan = false; 2564 break; 2565 } 2566 } 2567 } 2568 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, scan_flags); 2569 spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, cmd_flags); 2570 2571 if (complete_scan) 2572 mwifiex_complete_scan(priv); 2573 2574 return 0; 2575 } 2576 2577 /* This function This function handles the event extended scan report. It 2578 * parses extended scan results and informs to cfg80211 stack. 2579 */ 2580 int mwifiex_handle_event_ext_scan_report(struct mwifiex_private *priv, 2581 void *buf) 2582 { 2583 int ret = 0; 2584 struct mwifiex_adapter *adapter = priv->adapter; 2585 u8 *bss_info; 2586 u32 bytes_left, bytes_left_for_tlv, idx; 2587 u16 type, len; 2588 struct mwifiex_ie_types_data *tlv; 2589 struct mwifiex_ie_types_bss_scan_rsp *scan_rsp_tlv; 2590 struct mwifiex_ie_types_bss_scan_info *scan_info_tlv; 2591 u8 *radio_type; 2592 u64 fw_tsf = 0; 2593 s32 rssi = 0; 2594 struct mwifiex_event_scan_result *event_scan = buf; 2595 u8 num_of_set = event_scan->num_of_set; 2596 u8 *scan_resp = buf + sizeof(struct mwifiex_event_scan_result); 2597 u16 scan_resp_size = le16_to_cpu(event_scan->buf_size); 2598 2599 if (num_of_set > MWIFIEX_MAX_AP) { 2600 mwifiex_dbg(adapter, ERROR, 2601 "EXT_SCAN: Invalid number of AP returned (%d)!!\n", 2602 num_of_set); 2603 ret = -1; 2604 goto check_next_scan; 2605 } 2606 2607 bytes_left = scan_resp_size; 2608 mwifiex_dbg(adapter, INFO, 2609 "EXT_SCAN: size %d, returned %d APs...", 2610 scan_resp_size, num_of_set); 2611 mwifiex_dbg_dump(adapter, CMD_D, "EXT_SCAN buffer:", buf, 2612 scan_resp_size + 2613 sizeof(struct mwifiex_event_scan_result)); 2614 2615 tlv = (struct mwifiex_ie_types_data *)scan_resp; 2616 2617 for (idx = 0; idx < num_of_set && bytes_left; idx++) { 2618 type = le16_to_cpu(tlv->header.type); 2619 len = le16_to_cpu(tlv->header.len); 2620 if (bytes_left < sizeof(struct mwifiex_ie_types_header) + len) { 2621 mwifiex_dbg(adapter, ERROR, 2622 "EXT_SCAN: Error bytes left < TLV length\n"); 2623 break; 2624 } 2625 scan_rsp_tlv = NULL; 2626 scan_info_tlv = NULL; 2627 bytes_left_for_tlv = bytes_left; 2628 2629 /* BSS response TLV with beacon or probe response buffer 2630 * at the initial position of each descriptor 2631 */ 2632 if (type != TLV_TYPE_BSS_SCAN_RSP) 2633 break; 2634 2635 bss_info = (u8 *)tlv; 2636 scan_rsp_tlv = (struct mwifiex_ie_types_bss_scan_rsp *)tlv; 2637 tlv = (struct mwifiex_ie_types_data *)(tlv->data + len); 2638 bytes_left_for_tlv -= 2639 (len + sizeof(struct mwifiex_ie_types_header)); 2640 2641 while (bytes_left_for_tlv >= 2642 sizeof(struct mwifiex_ie_types_header) && 2643 le16_to_cpu(tlv->header.type) != TLV_TYPE_BSS_SCAN_RSP) { 2644 type = le16_to_cpu(tlv->header.type); 2645 len = le16_to_cpu(tlv->header.len); 2646 if (bytes_left_for_tlv < 2647 sizeof(struct mwifiex_ie_types_header) + len) { 2648 mwifiex_dbg(adapter, ERROR, 2649 "EXT_SCAN: Error in processing TLV,\t" 2650 "bytes left < TLV length\n"); 2651 scan_rsp_tlv = NULL; 2652 bytes_left_for_tlv = 0; 2653 continue; 2654 } 2655 switch (type) { 2656 case TLV_TYPE_BSS_SCAN_INFO: 2657 scan_info_tlv = 2658 (struct mwifiex_ie_types_bss_scan_info *)tlv; 2659 if (len != 2660 sizeof(struct mwifiex_ie_types_bss_scan_info) - 2661 sizeof(struct mwifiex_ie_types_header)) { 2662 bytes_left_for_tlv = 0; 2663 continue; 2664 } 2665 break; 2666 default: 2667 break; 2668 } 2669 tlv = (struct mwifiex_ie_types_data *)(tlv->data + len); 2670 bytes_left -= 2671 (len + sizeof(struct mwifiex_ie_types_header)); 2672 bytes_left_for_tlv -= 2673 (len + sizeof(struct mwifiex_ie_types_header)); 2674 } 2675 2676 if (!scan_rsp_tlv) 2677 break; 2678 2679 /* Advance pointer to the beacon buffer length and 2680 * update the bytes count so that the function 2681 * wlan_interpret_bss_desc_with_ie() can handle the 2682 * scan buffer withut any change 2683 */ 2684 bss_info += sizeof(u16); 2685 bytes_left -= sizeof(u16); 2686 2687 if (scan_info_tlv) { 2688 rssi = (s32)(s16)(le16_to_cpu(scan_info_tlv->rssi)); 2689 rssi *= 100; /* Convert dBm to mBm */ 2690 mwifiex_dbg(adapter, INFO, 2691 "info: InterpretIE: RSSI=%d\n", rssi); 2692 fw_tsf = le64_to_cpu(scan_info_tlv->tsf); 2693 radio_type = &scan_info_tlv->radio_type; 2694 } else { 2695 radio_type = NULL; 2696 } 2697 ret = mwifiex_parse_single_response_buf(priv, &bss_info, 2698 &bytes_left, fw_tsf, 2699 radio_type, true, rssi); 2700 if (ret) 2701 goto check_next_scan; 2702 } 2703 2704 check_next_scan: 2705 if (!event_scan->more_event) 2706 mwifiex_check_next_scan_command(priv); 2707 2708 return ret; 2709 } 2710 2711 /* 2712 * This function prepares command for background scan query. 2713 * 2714 * Preparation includes - 2715 * - Setting command ID and proper size 2716 * - Setting background scan flush parameter 2717 * - Ensuring correct endian-ness 2718 */ 2719 int mwifiex_cmd_802_11_bg_scan_query(struct host_cmd_ds_command *cmd) 2720 { 2721 struct host_cmd_ds_802_11_bg_scan_query *bg_query = 2722 &cmd->params.bg_scan_query; 2723 2724 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_BG_SCAN_QUERY); 2725 cmd->size = cpu_to_le16(sizeof(struct host_cmd_ds_802_11_bg_scan_query) 2726 + S_DS_GEN); 2727 2728 bg_query->flush = 1; 2729 2730 return 0; 2731 } 2732 2733 /* 2734 * This function inserts scan command node to the scan pending queue. 2735 */ 2736 void 2737 mwifiex_queue_scan_cmd(struct mwifiex_private *priv, 2738 struct cmd_ctrl_node *cmd_node) 2739 { 2740 struct mwifiex_adapter *adapter = priv->adapter; 2741 unsigned long flags; 2742 2743 cmd_node->wait_q_enabled = true; 2744 cmd_node->condition = &adapter->scan_wait_q_woken; 2745 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags); 2746 list_add_tail(&cmd_node->list, &adapter->scan_pending_q); 2747 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags); 2748 } 2749 2750 /* 2751 * This function sends a scan command for all available channels to the 2752 * firmware, filtered on a specific SSID. 2753 */ 2754 static int mwifiex_scan_specific_ssid(struct mwifiex_private *priv, 2755 struct cfg80211_ssid *req_ssid) 2756 { 2757 struct mwifiex_adapter *adapter = priv->adapter; 2758 int ret; 2759 struct mwifiex_user_scan_cfg *scan_cfg; 2760 2761 if (adapter->scan_processing) { 2762 mwifiex_dbg(adapter, WARN, 2763 "cmd: Scan already in process...\n"); 2764 return -EBUSY; 2765 } 2766 2767 if (priv->scan_block) { 2768 mwifiex_dbg(adapter, WARN, 2769 "cmd: Scan is blocked during association...\n"); 2770 return -EBUSY; 2771 } 2772 2773 scan_cfg = kzalloc(sizeof(struct mwifiex_user_scan_cfg), GFP_KERNEL); 2774 if (!scan_cfg) 2775 return -ENOMEM; 2776 2777 ether_addr_copy(scan_cfg->random_mac, priv->random_mac); 2778 scan_cfg->ssid_list = req_ssid; 2779 scan_cfg->num_ssids = 1; 2780 2781 ret = mwifiex_scan_networks(priv, scan_cfg); 2782 2783 kfree(scan_cfg); 2784 return ret; 2785 } 2786 2787 /* 2788 * Sends IOCTL request to start a scan. 2789 * 2790 * This function allocates the IOCTL request buffer, fills it 2791 * with requisite parameters and calls the IOCTL handler. 2792 * 2793 * Scan command can be issued for both normal scan and specific SSID 2794 * scan, depending upon whether an SSID is provided or not. 2795 */ 2796 int mwifiex_request_scan(struct mwifiex_private *priv, 2797 struct cfg80211_ssid *req_ssid) 2798 { 2799 int ret; 2800 2801 if (down_interruptible(&priv->async_sem)) { 2802 mwifiex_dbg(priv->adapter, ERROR, 2803 "%s: acquire semaphore fail\n", 2804 __func__); 2805 return -1; 2806 } 2807 2808 priv->adapter->scan_wait_q_woken = false; 2809 2810 if (req_ssid && req_ssid->ssid_len != 0) 2811 /* Specific SSID scan */ 2812 ret = mwifiex_scan_specific_ssid(priv, req_ssid); 2813 else 2814 /* Normal scan */ 2815 ret = mwifiex_scan_networks(priv, NULL); 2816 2817 up(&priv->async_sem); 2818 2819 return ret; 2820 } 2821 2822 /* 2823 * This function appends the vendor specific IE TLV to a buffer. 2824 */ 2825 int 2826 mwifiex_cmd_append_vsie_tlv(struct mwifiex_private *priv, 2827 u16 vsie_mask, u8 **buffer) 2828 { 2829 int id, ret_len = 0; 2830 struct mwifiex_ie_types_vendor_param_set *vs_param_set; 2831 2832 if (!buffer) 2833 return 0; 2834 if (!(*buffer)) 2835 return 0; 2836 2837 /* 2838 * Traverse through the saved vendor specific IE array and append 2839 * the selected(scan/assoc/adhoc) IE as TLV to the command 2840 */ 2841 for (id = 0; id < MWIFIEX_MAX_VSIE_NUM; id++) { 2842 if (priv->vs_ie[id].mask & vsie_mask) { 2843 vs_param_set = 2844 (struct mwifiex_ie_types_vendor_param_set *) 2845 *buffer; 2846 vs_param_set->header.type = 2847 cpu_to_le16(TLV_TYPE_PASSTHROUGH); 2848 vs_param_set->header.len = 2849 cpu_to_le16((((u16) priv->vs_ie[id].ie[1]) 2850 & 0x00FF) + 2); 2851 memcpy(vs_param_set->ie, priv->vs_ie[id].ie, 2852 le16_to_cpu(vs_param_set->header.len)); 2853 *buffer += le16_to_cpu(vs_param_set->header.len) + 2854 sizeof(struct mwifiex_ie_types_header); 2855 ret_len += le16_to_cpu(vs_param_set->header.len) + 2856 sizeof(struct mwifiex_ie_types_header); 2857 } 2858 } 2859 return ret_len; 2860 } 2861 2862 /* 2863 * This function saves a beacon buffer of the current BSS descriptor. 2864 * 2865 * The current beacon buffer is saved so that it can be restored in the 2866 * following cases that makes the beacon buffer not to contain the current 2867 * ssid's beacon buffer. 2868 * - The current ssid was not found somehow in the last scan. 2869 * - The current ssid was the last entry of the scan table and overloaded. 2870 */ 2871 void 2872 mwifiex_save_curr_bcn(struct mwifiex_private *priv) 2873 { 2874 struct mwifiex_bssdescriptor *curr_bss = 2875 &priv->curr_bss_params.bss_descriptor; 2876 2877 if (!curr_bss->beacon_buf_size) 2878 return; 2879 2880 /* allocate beacon buffer at 1st time; or if it's size has changed */ 2881 if (!priv->curr_bcn_buf || 2882 priv->curr_bcn_size != curr_bss->beacon_buf_size) { 2883 priv->curr_bcn_size = curr_bss->beacon_buf_size; 2884 2885 kfree(priv->curr_bcn_buf); 2886 priv->curr_bcn_buf = kmalloc(curr_bss->beacon_buf_size, 2887 GFP_ATOMIC); 2888 if (!priv->curr_bcn_buf) 2889 return; 2890 } 2891 2892 memcpy(priv->curr_bcn_buf, curr_bss->beacon_buf, 2893 curr_bss->beacon_buf_size); 2894 mwifiex_dbg(priv->adapter, INFO, 2895 "info: current beacon saved %d\n", 2896 priv->curr_bcn_size); 2897 2898 curr_bss->beacon_buf = priv->curr_bcn_buf; 2899 2900 /* adjust the pointers in the current BSS descriptor */ 2901 if (curr_bss->bcn_wpa_ie) 2902 curr_bss->bcn_wpa_ie = 2903 (struct ieee_types_vendor_specific *) 2904 (curr_bss->beacon_buf + 2905 curr_bss->wpa_offset); 2906 2907 if (curr_bss->bcn_rsn_ie) 2908 curr_bss->bcn_rsn_ie = (struct ieee_types_generic *) 2909 (curr_bss->beacon_buf + 2910 curr_bss->rsn_offset); 2911 2912 if (curr_bss->bcn_ht_cap) 2913 curr_bss->bcn_ht_cap = (struct ieee80211_ht_cap *) 2914 (curr_bss->beacon_buf + 2915 curr_bss->ht_cap_offset); 2916 2917 if (curr_bss->bcn_ht_oper) 2918 curr_bss->bcn_ht_oper = (struct ieee80211_ht_operation *) 2919 (curr_bss->beacon_buf + 2920 curr_bss->ht_info_offset); 2921 2922 if (curr_bss->bcn_vht_cap) 2923 curr_bss->bcn_vht_cap = (void *)(curr_bss->beacon_buf + 2924 curr_bss->vht_cap_offset); 2925 2926 if (curr_bss->bcn_vht_oper) 2927 curr_bss->bcn_vht_oper = (void *)(curr_bss->beacon_buf + 2928 curr_bss->vht_info_offset); 2929 2930 if (curr_bss->bcn_bss_co_2040) 2931 curr_bss->bcn_bss_co_2040 = 2932 (curr_bss->beacon_buf + curr_bss->bss_co_2040_offset); 2933 2934 if (curr_bss->bcn_ext_cap) 2935 curr_bss->bcn_ext_cap = curr_bss->beacon_buf + 2936 curr_bss->ext_cap_offset; 2937 2938 if (curr_bss->oper_mode) 2939 curr_bss->oper_mode = (void *)(curr_bss->beacon_buf + 2940 curr_bss->oper_mode_offset); 2941 } 2942 2943 /* 2944 * This function frees the current BSS descriptor beacon buffer. 2945 */ 2946 void 2947 mwifiex_free_curr_bcn(struct mwifiex_private *priv) 2948 { 2949 kfree(priv->curr_bcn_buf); 2950 priv->curr_bcn_buf = NULL; 2951 } 2952