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