1/* 2 * Marvell Wireless LAN device driver: scan ioctl and command handling 3 * 4 * Copyright (C) 2011, 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_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 58union 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 65enum cipher_suite { 66 CIPHER_SUITE_TKIP, 67 CIPHER_SUITE_CCMP, 68 CIPHER_SUITE_MAX 69}; 70static u8 mwifiex_wpa_oui[CIPHER_SUITE_MAX][4] = { 71 { 0x00, 0x50, 0xf2, 0x02 }, /* TKIP */ 72 { 0x00, 0x50, 0xf2, 0x04 }, /* AES */ 73}; 74static u8 mwifiex_rsn_oui[CIPHER_SUITE_MAX][4] = { 75 { 0x00, 0x0f, 0xac, 0x02 }, /* TKIP */ 76 { 0x00, 0x0f, 0xac, 0x04 }, /* AES */ 77}; 78 79/* 80 * This function parses a given IE for a given OUI. 81 * 82 * This is used to parse a WPA/RSN IE to find if it has 83 * a given oui in PTK. 84 */ 85static u8 86mwifiex_search_oui_in_ie(struct ie_body *iebody, u8 *oui) 87{ 88 u8 count; 89 90 count = iebody->ptk_cnt[0]; 91 92 /* There could be multiple OUIs for PTK hence 93 1) Take the length. 94 2) Check all the OUIs for AES. 95 3) If one of them is AES then pass success. */ 96 while (count) { 97 if (!memcmp(iebody->ptk_body, oui, sizeof(iebody->ptk_body))) 98 return MWIFIEX_OUI_PRESENT; 99 100 --count; 101 if (count) 102 iebody = (struct ie_body *) ((u8 *) iebody + 103 sizeof(iebody->ptk_body)); 104 } 105 106 pr_debug("info: %s: OUI is not found in PTK\n", __func__); 107 return MWIFIEX_OUI_NOT_PRESENT; 108} 109 110/* 111 * This function checks if a given OUI is present in a RSN IE. 112 * 113 * The function first checks if a RSN IE is present or not in the 114 * BSS descriptor. It tries to locate the OUI only if such an IE is 115 * present. 116 */ 117static u8 118mwifiex_is_rsn_oui_present(struct mwifiex_bssdescriptor *bss_desc, u32 cipher) 119{ 120 u8 *oui; 121 struct ie_body *iebody; 122 u8 ret = MWIFIEX_OUI_NOT_PRESENT; 123 124 if (((bss_desc->bcn_rsn_ie) && ((*(bss_desc->bcn_rsn_ie)). 125 ieee_hdr.element_id == WLAN_EID_RSN))) { 126 iebody = (struct ie_body *) 127 (((u8 *) bss_desc->bcn_rsn_ie->data) + 128 RSN_GTK_OUI_OFFSET); 129 oui = &mwifiex_rsn_oui[cipher][0]; 130 ret = mwifiex_search_oui_in_ie(iebody, oui); 131 if (ret) 132 return ret; 133 } 134 return ret; 135} 136 137/* 138 * This function checks if a given OUI is present in a WPA IE. 139 * 140 * The function first checks if a WPA IE is present or not in the 141 * BSS descriptor. It tries to locate the OUI only if such an IE is 142 * present. 143 */ 144static u8 145mwifiex_is_wpa_oui_present(struct mwifiex_bssdescriptor *bss_desc, u32 cipher) 146{ 147 u8 *oui; 148 struct ie_body *iebody; 149 u8 ret = MWIFIEX_OUI_NOT_PRESENT; 150 151 if (((bss_desc->bcn_wpa_ie) && 152 ((*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id == 153 WLAN_EID_WPA))) { 154 iebody = (struct ie_body *) bss_desc->bcn_wpa_ie->data; 155 oui = &mwifiex_wpa_oui[cipher][0]; 156 ret = mwifiex_search_oui_in_ie(iebody, oui); 157 if (ret) 158 return ret; 159 } 160 return ret; 161} 162 163/* 164 * This function compares two SSIDs and checks if they match. 165 */ 166s32 167mwifiex_ssid_cmp(struct cfg80211_ssid *ssid1, struct cfg80211_ssid *ssid2) 168{ 169 if (!ssid1 || !ssid2 || (ssid1->ssid_len != ssid2->ssid_len)) 170 return -1; 171 return memcmp(ssid1->ssid, ssid2->ssid, ssid1->ssid_len); 172} 173 174/* 175 * This function checks if wapi is enabled in driver and scanned network is 176 * compatible with it. 177 */ 178static bool 179mwifiex_is_bss_wapi(struct mwifiex_private *priv, 180 struct mwifiex_bssdescriptor *bss_desc) 181{ 182 if (priv->sec_info.wapi_enabled && 183 (bss_desc->bcn_wapi_ie && 184 ((*(bss_desc->bcn_wapi_ie)).ieee_hdr.element_id == 185 WLAN_EID_BSS_AC_ACCESS_DELAY))) { 186 return true; 187 } 188 return false; 189} 190 191/* 192 * This function checks if driver is configured with no security mode and 193 * scanned network is compatible with it. 194 */ 195static bool 196mwifiex_is_bss_no_sec(struct mwifiex_private *priv, 197 struct mwifiex_bssdescriptor *bss_desc) 198{ 199 if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled && 200 !priv->sec_info.wpa2_enabled && ((!bss_desc->bcn_wpa_ie) || 201 ((*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id != 202 WLAN_EID_WPA)) && 203 ((!bss_desc->bcn_rsn_ie) || 204 ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id != 205 WLAN_EID_RSN)) && 206 !priv->sec_info.encryption_mode && !bss_desc->privacy) { 207 return true; 208 } 209 return false; 210} 211 212/* 213 * This function checks if static WEP is enabled in driver and scanned network 214 * is compatible with it. 215 */ 216static bool 217mwifiex_is_bss_static_wep(struct mwifiex_private *priv, 218 struct mwifiex_bssdescriptor *bss_desc) 219{ 220 if (priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled && 221 !priv->sec_info.wpa2_enabled && bss_desc->privacy) { 222 return true; 223 } 224 return false; 225} 226 227/* 228 * This function checks if wpa is enabled in driver and scanned network is 229 * compatible with it. 230 */ 231static bool 232mwifiex_is_bss_wpa(struct mwifiex_private *priv, 233 struct mwifiex_bssdescriptor *bss_desc) 234{ 235 if (!priv->sec_info.wep_enabled && priv->sec_info.wpa_enabled && 236 !priv->sec_info.wpa2_enabled && ((bss_desc->bcn_wpa_ie) && 237 ((*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id == WLAN_EID_WPA)) 238 /* 239 * Privacy bit may NOT be set in some APs like 240 * LinkSys WRT54G && bss_desc->privacy 241 */ 242 ) { 243 dev_dbg(priv->adapter->dev, "info: %s: WPA:" 244 " wpa_ie=%#x wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s " 245 "EncMode=%#x privacy=%#x\n", __func__, 246 (bss_desc->bcn_wpa_ie) ? 247 (*(bss_desc->bcn_wpa_ie)). 248 vend_hdr.element_id : 0, 249 (bss_desc->bcn_rsn_ie) ? 250 (*(bss_desc->bcn_rsn_ie)). 251 ieee_hdr.element_id : 0, 252 (priv->sec_info.wep_enabled) ? "e" : "d", 253 (priv->sec_info.wpa_enabled) ? "e" : "d", 254 (priv->sec_info.wpa2_enabled) ? "e" : "d", 255 priv->sec_info.encryption_mode, 256 bss_desc->privacy); 257 return true; 258 } 259 return false; 260} 261 262/* 263 * This function checks if wpa2 is enabled in driver and scanned network is 264 * compatible with it. 265 */ 266static bool 267mwifiex_is_bss_wpa2(struct mwifiex_private *priv, 268 struct mwifiex_bssdescriptor *bss_desc) 269{ 270 if (!priv->sec_info.wep_enabled && 271 !priv->sec_info.wpa_enabled && 272 priv->sec_info.wpa2_enabled && 273 ((bss_desc->bcn_rsn_ie) && 274 ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id == WLAN_EID_RSN))) { 275 /* 276 * Privacy bit may NOT be set in some APs like 277 * LinkSys WRT54G && bss_desc->privacy 278 */ 279 dev_dbg(priv->adapter->dev, "info: %s: WPA2: " 280 " wpa_ie=%#x wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s " 281 "EncMode=%#x privacy=%#x\n", __func__, 282 (bss_desc->bcn_wpa_ie) ? 283 (*(bss_desc->bcn_wpa_ie)). 284 vend_hdr.element_id : 0, 285 (bss_desc->bcn_rsn_ie) ? 286 (*(bss_desc->bcn_rsn_ie)). 287 ieee_hdr.element_id : 0, 288 (priv->sec_info.wep_enabled) ? "e" : "d", 289 (priv->sec_info.wpa_enabled) ? "e" : "d", 290 (priv->sec_info.wpa2_enabled) ? "e" : "d", 291 priv->sec_info.encryption_mode, 292 bss_desc->privacy); 293 return true; 294 } 295 return false; 296} 297 298/* 299 * This function checks if adhoc AES is enabled in driver and scanned network is 300 * compatible with it. 301 */ 302static bool 303mwifiex_is_bss_adhoc_aes(struct mwifiex_private *priv, 304 struct mwifiex_bssdescriptor *bss_desc) 305{ 306 if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled && 307 !priv->sec_info.wpa2_enabled && 308 ((!bss_desc->bcn_wpa_ie) || 309 ((*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id != WLAN_EID_WPA)) && 310 ((!bss_desc->bcn_rsn_ie) || 311 ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id != WLAN_EID_RSN)) && 312 !priv->sec_info.encryption_mode && bss_desc->privacy) { 313 return true; 314 } 315 return false; 316} 317 318/* 319 * This function checks if dynamic WEP is enabled in driver and scanned network 320 * is compatible with it. 321 */ 322static bool 323mwifiex_is_bss_dynamic_wep(struct mwifiex_private *priv, 324 struct mwifiex_bssdescriptor *bss_desc) 325{ 326 if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled && 327 !priv->sec_info.wpa2_enabled && 328 ((!bss_desc->bcn_wpa_ie) || 329 ((*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id != WLAN_EID_WPA)) && 330 ((!bss_desc->bcn_rsn_ie) || 331 ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id != WLAN_EID_RSN)) && 332 priv->sec_info.encryption_mode && bss_desc->privacy) { 333 dev_dbg(priv->adapter->dev, "info: %s: dynamic " 334 "WEP: wpa_ie=%#x wpa2_ie=%#x " 335 "EncMode=%#x privacy=%#x\n", 336 __func__, 337 (bss_desc->bcn_wpa_ie) ? 338 (*(bss_desc->bcn_wpa_ie)). 339 vend_hdr.element_id : 0, 340 (bss_desc->bcn_rsn_ie) ? 341 (*(bss_desc->bcn_rsn_ie)). 342 ieee_hdr.element_id : 0, 343 priv->sec_info.encryption_mode, 344 bss_desc->privacy); 345 return true; 346 } 347 return false; 348} 349 350/* 351 * This function checks if a scanned network is compatible with the driver 352 * settings. 353 * 354 * WEP WPA WPA2 ad-hoc encrypt Network 355 * enabled enabled enabled AES mode Privacy WPA WPA2 Compatible 356 * 0 0 0 0 NONE 0 0 0 yes No security 357 * 0 1 0 0 x 1x 1 x yes WPA (disable 358 * HT if no AES) 359 * 0 0 1 0 x 1x x 1 yes WPA2 (disable 360 * HT if no AES) 361 * 0 0 0 1 NONE 1 0 0 yes Ad-hoc AES 362 * 1 0 0 0 NONE 1 0 0 yes Static WEP 363 * (disable HT) 364 * 0 0 0 0 !=NONE 1 0 0 yes Dynamic WEP 365 * 366 * Compatibility is not matched while roaming, except for mode. 367 */ 368static s32 369mwifiex_is_network_compatible(struct mwifiex_private *priv, 370 struct mwifiex_bssdescriptor *bss_desc, u32 mode) 371{ 372 struct mwifiex_adapter *adapter = priv->adapter; 373 374 bss_desc->disable_11n = false; 375 376 /* Don't check for compatibility if roaming */ 377 if (priv->media_connected && 378 (priv->bss_mode == NL80211_IFTYPE_STATION) && 379 (bss_desc->bss_mode == NL80211_IFTYPE_STATION)) 380 return 0; 381 382 if (priv->wps.session_enable) { 383 dev_dbg(adapter->dev, 384 "info: return success directly in WPS period\n"); 385 return 0; 386 } 387 388 if (mwifiex_is_bss_wapi(priv, bss_desc)) { 389 dev_dbg(adapter->dev, "info: return success for WAPI AP\n"); 390 return 0; 391 } 392 393 if (bss_desc->bss_mode == mode) { 394 if (mwifiex_is_bss_no_sec(priv, bss_desc)) { 395 /* No security */ 396 return 0; 397 } else if (mwifiex_is_bss_static_wep(priv, bss_desc)) { 398 /* Static WEP enabled */ 399 dev_dbg(adapter->dev, "info: Disable 11n in WEP mode.\n"); 400 bss_desc->disable_11n = true; 401 return 0; 402 } else if (mwifiex_is_bss_wpa(priv, bss_desc)) { 403 /* WPA enabled */ 404 if (((priv->adapter->config_bands & BAND_GN || 405 priv->adapter->config_bands & BAND_AN) && 406 bss_desc->bcn_ht_cap) && 407 !mwifiex_is_wpa_oui_present(bss_desc, 408 CIPHER_SUITE_CCMP)) { 409 410 if (mwifiex_is_wpa_oui_present 411 (bss_desc, CIPHER_SUITE_TKIP)) { 412 dev_dbg(adapter->dev, 413 "info: Disable 11n if AES " 414 "is not supported by AP\n"); 415 bss_desc->disable_11n = true; 416 } else { 417 return -1; 418 } 419 } 420 return 0; 421 } else if (mwifiex_is_bss_wpa2(priv, bss_desc)) { 422 /* WPA2 enabled */ 423 if (((priv->adapter->config_bands & BAND_GN || 424 priv->adapter->config_bands & BAND_AN) && 425 bss_desc->bcn_ht_cap) && 426 !mwifiex_is_rsn_oui_present(bss_desc, 427 CIPHER_SUITE_CCMP)) { 428 429 if (mwifiex_is_rsn_oui_present 430 (bss_desc, CIPHER_SUITE_TKIP)) { 431 dev_dbg(adapter->dev, 432 "info: Disable 11n if AES " 433 "is not supported by AP\n"); 434 bss_desc->disable_11n = true; 435 } else { 436 return -1; 437 } 438 } 439 return 0; 440 } else if (mwifiex_is_bss_adhoc_aes(priv, bss_desc)) { 441 /* Ad-hoc AES enabled */ 442 return 0; 443 } else if (mwifiex_is_bss_dynamic_wep(priv, bss_desc)) { 444 /* Dynamic WEP enabled */ 445 return 0; 446 } 447 448 /* Security doesn't match */ 449 dev_dbg(adapter->dev, 450 "info: %s: failed: wpa_ie=%#x wpa2_ie=%#x WEP=%s " 451 "WPA=%s WPA2=%s EncMode=%#x privacy=%#x\n", __func__, 452 (bss_desc->bcn_wpa_ie) ? 453 (*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id : 0, 454 (bss_desc->bcn_rsn_ie) ? 455 (*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id : 0, 456 (priv->sec_info.wep_enabled) ? "e" : "d", 457 (priv->sec_info.wpa_enabled) ? "e" : "d", 458 (priv->sec_info.wpa2_enabled) ? "e" : "d", 459 priv->sec_info.encryption_mode, bss_desc->privacy); 460 return -1; 461 } 462 463 /* Mode doesn't match */ 464 return -1; 465} 466 467/* 468 * This function creates a channel list for the driver to scan, based 469 * on region/band information. 470 * 471 * This routine is used for any scan that is not provided with a 472 * specific channel list to scan. 473 */ 474static void 475mwifiex_scan_create_channel_list(struct mwifiex_private *priv, 476 const struct mwifiex_user_scan_cfg 477 *user_scan_in, 478 struct mwifiex_chan_scan_param_set 479 *scan_chan_list, 480 u8 filtered_scan) 481{ 482 enum ieee80211_band band; 483 struct ieee80211_supported_band *sband; 484 struct ieee80211_channel *ch; 485 struct mwifiex_adapter *adapter = priv->adapter; 486 int chan_idx = 0, i; 487 488 for (band = 0; (band < IEEE80211_NUM_BANDS) ; band++) { 489 490 if (!priv->wdev->wiphy->bands[band]) 491 continue; 492 493 sband = priv->wdev->wiphy->bands[band]; 494 495 for (i = 0; (i < sband->n_channels) ; i++) { 496 ch = &sband->channels[i]; 497 if (ch->flags & IEEE80211_CHAN_DISABLED) 498 continue; 499 scan_chan_list[chan_idx].radio_type = band; 500 501 if (user_scan_in && 502 user_scan_in->chan_list[0].scan_time) 503 scan_chan_list[chan_idx].max_scan_time = 504 cpu_to_le16((u16) user_scan_in-> 505 chan_list[0].scan_time); 506 else if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN) 507 scan_chan_list[chan_idx].max_scan_time = 508 cpu_to_le16(adapter->passive_scan_time); 509 else 510 scan_chan_list[chan_idx].max_scan_time = 511 cpu_to_le16(adapter->active_scan_time); 512 513 if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN) 514 scan_chan_list[chan_idx].chan_scan_mode_bitmap 515 |= MWIFIEX_PASSIVE_SCAN; 516 else 517 scan_chan_list[chan_idx].chan_scan_mode_bitmap 518 &= ~MWIFIEX_PASSIVE_SCAN; 519 scan_chan_list[chan_idx].chan_number = 520 (u32) ch->hw_value; 521 if (filtered_scan) { 522 scan_chan_list[chan_idx].max_scan_time = 523 cpu_to_le16(adapter->specific_scan_time); 524 scan_chan_list[chan_idx].chan_scan_mode_bitmap 525 |= MWIFIEX_DISABLE_CHAN_FILT; 526 } 527 chan_idx++; 528 } 529 530 } 531} 532 533/* 534 * This function constructs and sends multiple scan config commands to 535 * the firmware. 536 * 537 * Previous routines in the code flow have created a scan command configuration 538 * with any requested TLVs. This function splits the channel TLV into maximum 539 * channels supported per scan lists and sends the portion of the channel TLV, 540 * along with the other TLVs, to the firmware. 541 */ 542static int 543mwifiex_scan_channel_list(struct mwifiex_private *priv, 544 u32 max_chan_per_scan, u8 filtered_scan, 545 struct mwifiex_scan_cmd_config *scan_cfg_out, 546 struct mwifiex_ie_types_chan_list_param_set 547 *chan_tlv_out, 548 struct mwifiex_chan_scan_param_set *scan_chan_list) 549{ 550 int ret = 0; 551 struct mwifiex_chan_scan_param_set *tmp_chan_list; 552 struct mwifiex_chan_scan_param_set *start_chan; 553 554 u32 tlv_idx; 555 u32 total_scan_time; 556 u32 done_early; 557 558 if (!scan_cfg_out || !chan_tlv_out || !scan_chan_list) { 559 dev_dbg(priv->adapter->dev, 560 "info: Scan: Null detect: %p, %p, %p\n", 561 scan_cfg_out, chan_tlv_out, scan_chan_list); 562 return -1; 563 } 564 565 chan_tlv_out->header.type = cpu_to_le16(TLV_TYPE_CHANLIST); 566 567 /* Set the temp channel struct pointer to the start of the desired 568 list */ 569 tmp_chan_list = scan_chan_list; 570 571 /* Loop through the desired channel list, sending a new firmware scan 572 commands for each max_chan_per_scan channels (or for 1,6,11 573 individually if configured accordingly) */ 574 while (tmp_chan_list->chan_number) { 575 576 tlv_idx = 0; 577 total_scan_time = 0; 578 chan_tlv_out->header.len = 0; 579 start_chan = tmp_chan_list; 580 done_early = false; 581 582 /* 583 * Construct the Channel TLV for the scan command. Continue to 584 * insert channel TLVs until: 585 * - the tlv_idx hits the maximum configured per scan command 586 * - the next channel to insert is 0 (end of desired channel 587 * list) 588 * - done_early is set (controlling individual scanning of 589 * 1,6,11) 590 */ 591 while (tlv_idx < max_chan_per_scan && 592 tmp_chan_list->chan_number && !done_early) { 593 594 dev_dbg(priv->adapter->dev, 595 "info: Scan: Chan(%3d), Radio(%d)," 596 " Mode(%d, %d), Dur(%d)\n", 597 tmp_chan_list->chan_number, 598 tmp_chan_list->radio_type, 599 tmp_chan_list->chan_scan_mode_bitmap 600 & MWIFIEX_PASSIVE_SCAN, 601 (tmp_chan_list->chan_scan_mode_bitmap 602 & MWIFIEX_DISABLE_CHAN_FILT) >> 1, 603 le16_to_cpu(tmp_chan_list->max_scan_time)); 604 605 /* Copy the current channel TLV to the command being 606 prepared */ 607 memcpy(chan_tlv_out->chan_scan_param + tlv_idx, 608 tmp_chan_list, 609 sizeof(chan_tlv_out->chan_scan_param)); 610 611 /* Increment the TLV header length by the size 612 appended */ 613 chan_tlv_out->header.len = 614 cpu_to_le16(le16_to_cpu(chan_tlv_out->header.len) + 615 (sizeof(chan_tlv_out->chan_scan_param))); 616 617 /* 618 * The tlv buffer length is set to the number of bytes 619 * of the between the channel tlv pointer and the start 620 * of the tlv buffer. This compensates for any TLVs 621 * that were appended before the channel list. 622 */ 623 scan_cfg_out->tlv_buf_len = (u32) ((u8 *) chan_tlv_out - 624 scan_cfg_out->tlv_buf); 625 626 /* Add the size of the channel tlv header and the data 627 length */ 628 scan_cfg_out->tlv_buf_len += 629 (sizeof(chan_tlv_out->header) 630 + le16_to_cpu(chan_tlv_out->header.len)); 631 632 /* Increment the index to the channel tlv we are 633 constructing */ 634 tlv_idx++; 635 636 /* Count the total scan time per command */ 637 total_scan_time += 638 le16_to_cpu(tmp_chan_list->max_scan_time); 639 640 done_early = false; 641 642 /* Stop the loop if the *current* channel is in the 643 1,6,11 set and we are not filtering on a BSSID 644 or SSID. */ 645 if (!filtered_scan && 646 (tmp_chan_list->chan_number == 1 || 647 tmp_chan_list->chan_number == 6 || 648 tmp_chan_list->chan_number == 11)) 649 done_early = true; 650 651 /* Increment the tmp pointer to the next channel to 652 be scanned */ 653 tmp_chan_list++; 654 655 /* Stop the loop if the *next* channel is in the 1,6,11 656 set. This will cause it to be the only channel 657 scanned on the next interation */ 658 if (!filtered_scan && 659 (tmp_chan_list->chan_number == 1 || 660 tmp_chan_list->chan_number == 6 || 661 tmp_chan_list->chan_number == 11)) 662 done_early = true; 663 } 664 665 /* The total scan time should be less than scan command timeout 666 value */ 667 if (total_scan_time > MWIFIEX_MAX_TOTAL_SCAN_TIME) { 668 dev_err(priv->adapter->dev, "total scan time %dms" 669 " is over limit (%dms), scan skipped\n", 670 total_scan_time, MWIFIEX_MAX_TOTAL_SCAN_TIME); 671 ret = -1; 672 break; 673 } 674 675 priv->adapter->scan_channels = start_chan; 676 677 /* Send the scan command to the firmware with the specified 678 cfg */ 679 ret = mwifiex_send_cmd_async(priv, HostCmd_CMD_802_11_SCAN, 680 HostCmd_ACT_GEN_SET, 0, 681 scan_cfg_out); 682 if (ret) 683 break; 684 } 685 686 if (ret) 687 return -1; 688 689 return 0; 690} 691 692/* 693 * This function constructs a scan command configuration structure to use 694 * in scan commands. 695 * 696 * Application layer or other functions can invoke network scanning 697 * with a scan configuration supplied in a user scan configuration structure. 698 * This structure is used as the basis of one or many scan command configuration 699 * commands that are sent to the command processing module and eventually to the 700 * firmware. 701 * 702 * This function creates a scan command configuration structure based on the 703 * following user supplied parameters (if present): 704 * - SSID filter 705 * - BSSID filter 706 * - Number of Probes to be sent 707 * - Channel list 708 * 709 * If the SSID or BSSID filter is not present, the filter is disabled/cleared. 710 * If the number of probes is not set, adapter default setting is used. 711 */ 712static void 713mwifiex_config_scan(struct mwifiex_private *priv, 714 const struct mwifiex_user_scan_cfg *user_scan_in, 715 struct mwifiex_scan_cmd_config *scan_cfg_out, 716 struct mwifiex_ie_types_chan_list_param_set **chan_list_out, 717 struct mwifiex_chan_scan_param_set *scan_chan_list, 718 u8 *max_chan_per_scan, u8 *filtered_scan, 719 u8 *scan_current_only) 720{ 721 struct mwifiex_adapter *adapter = priv->adapter; 722 struct mwifiex_ie_types_num_probes *num_probes_tlv; 723 struct mwifiex_ie_types_wildcard_ssid_params *wildcard_ssid_tlv; 724 struct mwifiex_ie_types_rates_param_set *rates_tlv; 725 const u8 zero_mac[ETH_ALEN] = { 0, 0, 0, 0, 0, 0 }; 726 u8 *tlv_pos; 727 u32 num_probes; 728 u32 ssid_len; 729 u32 chan_idx; 730 u32 scan_type; 731 u16 scan_dur; 732 u8 channel; 733 u8 radio_type; 734 int i; 735 u8 ssid_filter; 736 u8 rates[MWIFIEX_SUPPORTED_RATES]; 737 u32 rates_size; 738 struct mwifiex_ie_types_htcap *ht_cap; 739 740 /* The tlv_buf_len is calculated for each scan command. The TLVs added 741 in this routine will be preserved since the routine that sends the 742 command will append channelTLVs at *chan_list_out. The difference 743 between the *chan_list_out and the tlv_buf start will be used to 744 calculate the size of anything we add in this routine. */ 745 scan_cfg_out->tlv_buf_len = 0; 746 747 /* Running tlv pointer. Assigned to chan_list_out at end of function 748 so later routines know where channels can be added to the command 749 buf */ 750 tlv_pos = scan_cfg_out->tlv_buf; 751 752 /* Initialize the scan as un-filtered; the flag is later set to TRUE 753 below if a SSID or BSSID filter is sent in the command */ 754 *filtered_scan = false; 755 756 /* Initialize the scan as not being only on the current channel. If 757 the channel list is customized, only contains one channel, and is 758 the active channel, this is set true and data flow is not halted. */ 759 *scan_current_only = false; 760 761 if (user_scan_in) { 762 763 /* Default the ssid_filter flag to TRUE, set false under 764 certain wildcard conditions and qualified by the existence 765 of an SSID list before marking the scan as filtered */ 766 ssid_filter = true; 767 768 /* Set the BSS type scan filter, use Adapter setting if 769 unset */ 770 scan_cfg_out->bss_mode = 771 (user_scan_in->bss_mode ? (u8) user_scan_in-> 772 bss_mode : (u8) adapter->scan_mode); 773 774 /* Set the number of probes to send, use Adapter setting 775 if unset */ 776 num_probes = 777 (user_scan_in->num_probes ? user_scan_in-> 778 num_probes : adapter->scan_probes); 779 780 /* 781 * Set the BSSID filter to the incoming configuration, 782 * if non-zero. If not set, it will remain disabled 783 * (all zeros). 784 */ 785 memcpy(scan_cfg_out->specific_bssid, 786 user_scan_in->specific_bssid, 787 sizeof(scan_cfg_out->specific_bssid)); 788 789 for (i = 0; i < user_scan_in->num_ssids; i++) { 790 ssid_len = user_scan_in->ssid_list[i].ssid_len; 791 792 wildcard_ssid_tlv = 793 (struct mwifiex_ie_types_wildcard_ssid_params *) 794 tlv_pos; 795 wildcard_ssid_tlv->header.type = 796 cpu_to_le16(TLV_TYPE_WILDCARDSSID); 797 wildcard_ssid_tlv->header.len = cpu_to_le16( 798 (u16) (ssid_len + sizeof(wildcard_ssid_tlv-> 799 max_ssid_length))); 800 801 /* 802 * max_ssid_length = 0 tells firmware to perform 803 * specific scan for the SSID filled, whereas 804 * max_ssid_length = IEEE80211_MAX_SSID_LEN is for 805 * wildcard scan. 806 */ 807 if (ssid_len) 808 wildcard_ssid_tlv->max_ssid_length = 0; 809 else 810 wildcard_ssid_tlv->max_ssid_length = 811 IEEE80211_MAX_SSID_LEN; 812 813 memcpy(wildcard_ssid_tlv->ssid, 814 user_scan_in->ssid_list[i].ssid, ssid_len); 815 816 tlv_pos += (sizeof(wildcard_ssid_tlv->header) 817 + le16_to_cpu(wildcard_ssid_tlv->header.len)); 818 819 dev_dbg(adapter->dev, "info: scan: ssid[%d]: %s, %d\n", 820 i, wildcard_ssid_tlv->ssid, 821 wildcard_ssid_tlv->max_ssid_length); 822 823 /* Empty wildcard ssid with a maxlen will match many or 824 potentially all SSIDs (maxlen == 32), therefore do 825 not treat the scan as 826 filtered. */ 827 if (!ssid_len && wildcard_ssid_tlv->max_ssid_length) 828 ssid_filter = false; 829 } 830 831 /* 832 * The default number of channels sent in the command is low to 833 * ensure the response buffer from the firmware does not 834 * truncate scan results. That is not an issue with an SSID 835 * or BSSID filter applied to the scan results in the firmware. 836 */ 837 if ((i && ssid_filter) || 838 memcmp(scan_cfg_out->specific_bssid, &zero_mac, 839 sizeof(zero_mac))) 840 *filtered_scan = true; 841 } else { 842 scan_cfg_out->bss_mode = (u8) adapter->scan_mode; 843 num_probes = adapter->scan_probes; 844 } 845 846 /* 847 * If a specific BSSID or SSID is used, the number of channels in the 848 * scan command will be increased to the absolute maximum. 849 */ 850 if (*filtered_scan) 851 *max_chan_per_scan = MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN; 852 else 853 *max_chan_per_scan = MWIFIEX_CHANNELS_PER_SCAN_CMD; 854 855 /* If the input config or adapter has the number of Probes set, 856 add tlv */ 857 if (num_probes) { 858 859 dev_dbg(adapter->dev, "info: scan: num_probes = %d\n", 860 num_probes); 861 862 num_probes_tlv = (struct mwifiex_ie_types_num_probes *) tlv_pos; 863 num_probes_tlv->header.type = cpu_to_le16(TLV_TYPE_NUMPROBES); 864 num_probes_tlv->header.len = 865 cpu_to_le16(sizeof(num_probes_tlv->num_probes)); 866 num_probes_tlv->num_probes = cpu_to_le16((u16) num_probes); 867 868 tlv_pos += sizeof(num_probes_tlv->header) + 869 le16_to_cpu(num_probes_tlv->header.len); 870 871 } 872 873 /* Append rates tlv */ 874 memset(rates, 0, sizeof(rates)); 875 876 rates_size = mwifiex_get_supported_rates(priv, rates); 877 878 rates_tlv = (struct mwifiex_ie_types_rates_param_set *) tlv_pos; 879 rates_tlv->header.type = cpu_to_le16(WLAN_EID_SUPP_RATES); 880 rates_tlv->header.len = cpu_to_le16((u16) rates_size); 881 memcpy(rates_tlv->rates, rates, rates_size); 882 tlv_pos += sizeof(rates_tlv->header) + rates_size; 883 884 dev_dbg(adapter->dev, "info: SCAN_CMD: Rates size = %d\n", rates_size); 885 886 if (ISSUPP_11NENABLED(priv->adapter->fw_cap_info) && 887 (priv->adapter->config_bands & BAND_GN || 888 priv->adapter->config_bands & BAND_AN)) { 889 ht_cap = (struct mwifiex_ie_types_htcap *) tlv_pos; 890 memset(ht_cap, 0, sizeof(struct mwifiex_ie_types_htcap)); 891 ht_cap->header.type = cpu_to_le16(WLAN_EID_HT_CAPABILITY); 892 ht_cap->header.len = 893 cpu_to_le16(sizeof(struct ieee80211_ht_cap)); 894 radio_type = 895 mwifiex_band_to_radio_type(priv->adapter->config_bands); 896 mwifiex_fill_cap_info(priv, radio_type, ht_cap); 897 tlv_pos += sizeof(struct mwifiex_ie_types_htcap); 898 } 899 900 /* Append vendor specific IE TLV */ 901 mwifiex_cmd_append_vsie_tlv(priv, MWIFIEX_VSIE_MASK_SCAN, &tlv_pos); 902 903 /* 904 * Set the output for the channel TLV to the address in the tlv buffer 905 * past any TLVs that were added in this function (SSID, num_probes). 906 * Channel TLVs will be added past this for each scan command, 907 * preserving the TLVs that were previously added. 908 */ 909 *chan_list_out = 910 (struct mwifiex_ie_types_chan_list_param_set *) tlv_pos; 911 912 if (user_scan_in && user_scan_in->chan_list[0].chan_number) { 913 914 dev_dbg(adapter->dev, "info: Scan: Using supplied channel list\n"); 915 916 for (chan_idx = 0; 917 chan_idx < MWIFIEX_USER_SCAN_CHAN_MAX && 918 user_scan_in->chan_list[chan_idx].chan_number; 919 chan_idx++) { 920 921 channel = user_scan_in->chan_list[chan_idx].chan_number; 922 (scan_chan_list + chan_idx)->chan_number = channel; 923 924 radio_type = 925 user_scan_in->chan_list[chan_idx].radio_type; 926 (scan_chan_list + chan_idx)->radio_type = radio_type; 927 928 scan_type = user_scan_in->chan_list[chan_idx].scan_type; 929 930 if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE) 931 (scan_chan_list + 932 chan_idx)->chan_scan_mode_bitmap 933 |= MWIFIEX_PASSIVE_SCAN; 934 else 935 (scan_chan_list + 936 chan_idx)->chan_scan_mode_bitmap 937 &= ~MWIFIEX_PASSIVE_SCAN; 938 939 if (user_scan_in->chan_list[chan_idx].scan_time) { 940 scan_dur = (u16) user_scan_in-> 941 chan_list[chan_idx].scan_time; 942 } else { 943 if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE) 944 scan_dur = adapter->passive_scan_time; 945 else if (*filtered_scan) 946 scan_dur = adapter->specific_scan_time; 947 else 948 scan_dur = adapter->active_scan_time; 949 } 950 951 (scan_chan_list + chan_idx)->min_scan_time = 952 cpu_to_le16(scan_dur); 953 (scan_chan_list + chan_idx)->max_scan_time = 954 cpu_to_le16(scan_dur); 955 } 956 957 /* Check if we are only scanning the current channel */ 958 if ((chan_idx == 1) && 959 (user_scan_in->chan_list[0].chan_number == 960 priv->curr_bss_params.bss_descriptor.channel)) { 961 *scan_current_only = true; 962 dev_dbg(adapter->dev, 963 "info: Scan: Scanning current channel only\n"); 964 } 965 966 } else { 967 dev_dbg(adapter->dev, 968 "info: Scan: Creating full region channel list\n"); 969 mwifiex_scan_create_channel_list(priv, user_scan_in, 970 scan_chan_list, 971 *filtered_scan); 972 } 973} 974 975/* 976 * This function inspects the scan response buffer for pointers to 977 * expected TLVs. 978 * 979 * TLVs can be included at the end of the scan response BSS information. 980 * 981 * Data in the buffer is parsed pointers to TLVs that can potentially 982 * be passed back in the response. 983 */ 984static void 985mwifiex_ret_802_11_scan_get_tlv_ptrs(struct mwifiex_adapter *adapter, 986 struct mwifiex_ie_types_data *tlv, 987 u32 tlv_buf_size, u32 req_tlv_type, 988 struct mwifiex_ie_types_data **tlv_data) 989{ 990 struct mwifiex_ie_types_data *current_tlv; 991 u32 tlv_buf_left; 992 u32 tlv_type; 993 u32 tlv_len; 994 995 current_tlv = tlv; 996 tlv_buf_left = tlv_buf_size; 997 *tlv_data = NULL; 998 999 dev_dbg(adapter->dev, "info: SCAN_RESP: tlv_buf_size = %d\n", 1000 tlv_buf_size); 1001 1002 while (tlv_buf_left >= sizeof(struct mwifiex_ie_types_header)) { 1003 1004 tlv_type = le16_to_cpu(current_tlv->header.type); 1005 tlv_len = le16_to_cpu(current_tlv->header.len); 1006 1007 if (sizeof(tlv->header) + tlv_len > tlv_buf_left) { 1008 dev_err(adapter->dev, "SCAN_RESP: TLV buffer corrupt\n"); 1009 break; 1010 } 1011 1012 if (req_tlv_type == tlv_type) { 1013 switch (tlv_type) { 1014 case TLV_TYPE_TSFTIMESTAMP: 1015 dev_dbg(adapter->dev, "info: SCAN_RESP: TSF " 1016 "timestamp TLV, len = %d\n", tlv_len); 1017 *tlv_data = (struct mwifiex_ie_types_data *) 1018 current_tlv; 1019 break; 1020 case TLV_TYPE_CHANNELBANDLIST: 1021 dev_dbg(adapter->dev, "info: SCAN_RESP: channel" 1022 " band list TLV, len = %d\n", tlv_len); 1023 *tlv_data = (struct mwifiex_ie_types_data *) 1024 current_tlv; 1025 break; 1026 default: 1027 dev_err(adapter->dev, 1028 "SCAN_RESP: unhandled TLV = %d\n", 1029 tlv_type); 1030 /* Give up, this seems corrupted */ 1031 return; 1032 } 1033 } 1034 1035 if (*tlv_data) 1036 break; 1037 1038 1039 tlv_buf_left -= (sizeof(tlv->header) + tlv_len); 1040 current_tlv = 1041 (struct mwifiex_ie_types_data *) (current_tlv->data + 1042 tlv_len); 1043 1044 } /* while */ 1045} 1046 1047/* 1048 * This function parses provided beacon buffer and updates 1049 * respective fields in bss descriptor structure. 1050 */ 1051int 1052mwifiex_update_bss_desc_with_ie(struct mwifiex_adapter *adapter, 1053 struct mwifiex_bssdescriptor *bss_entry, 1054 u8 *ie_buf, u32 ie_len) 1055{ 1056 int ret = 0; 1057 u8 element_id; 1058 struct ieee_types_fh_param_set *fh_param_set; 1059 struct ieee_types_ds_param_set *ds_param_set; 1060 struct ieee_types_cf_param_set *cf_param_set; 1061 struct ieee_types_ibss_param_set *ibss_param_set; 1062 u8 *current_ptr; 1063 u8 *rate; 1064 u8 element_len; 1065 u16 total_ie_len; 1066 u8 bytes_to_copy; 1067 u8 rate_size; 1068 u8 found_data_rate_ie; 1069 u32 bytes_left; 1070 struct ieee_types_vendor_specific *vendor_ie; 1071 const u8 wpa_oui[4] = { 0x00, 0x50, 0xf2, 0x01 }; 1072 const u8 wmm_oui[4] = { 0x00, 0x50, 0xf2, 0x02 }; 1073 1074 found_data_rate_ie = false; 1075 rate_size = 0; 1076 current_ptr = ie_buf; 1077 bytes_left = ie_len; 1078 bss_entry->beacon_buf = ie_buf; 1079 bss_entry->beacon_buf_size = ie_len; 1080 1081 /* Process variable IE */ 1082 while (bytes_left >= 2) { 1083 element_id = *current_ptr; 1084 element_len = *(current_ptr + 1); 1085 total_ie_len = element_len + sizeof(struct ieee_types_header); 1086 1087 if (bytes_left < total_ie_len) { 1088 dev_err(adapter->dev, "err: InterpretIE: in processing" 1089 " IE, bytes left < IE length\n"); 1090 return -1; 1091 } 1092 switch (element_id) { 1093 case WLAN_EID_SSID: 1094 bss_entry->ssid.ssid_len = element_len; 1095 memcpy(bss_entry->ssid.ssid, (current_ptr + 2), 1096 element_len); 1097 dev_dbg(adapter->dev, 1098 "info: InterpretIE: ssid: %-32s\n", 1099 bss_entry->ssid.ssid); 1100 break; 1101 1102 case WLAN_EID_SUPP_RATES: 1103 memcpy(bss_entry->data_rates, current_ptr + 2, 1104 element_len); 1105 memcpy(bss_entry->supported_rates, current_ptr + 2, 1106 element_len); 1107 rate_size = element_len; 1108 found_data_rate_ie = true; 1109 break; 1110 1111 case WLAN_EID_FH_PARAMS: 1112 fh_param_set = 1113 (struct ieee_types_fh_param_set *) current_ptr; 1114 memcpy(&bss_entry->phy_param_set.fh_param_set, 1115 fh_param_set, 1116 sizeof(struct ieee_types_fh_param_set)); 1117 break; 1118 1119 case WLAN_EID_DS_PARAMS: 1120 ds_param_set = 1121 (struct ieee_types_ds_param_set *) current_ptr; 1122 1123 bss_entry->channel = ds_param_set->current_chan; 1124 1125 memcpy(&bss_entry->phy_param_set.ds_param_set, 1126 ds_param_set, 1127 sizeof(struct ieee_types_ds_param_set)); 1128 break; 1129 1130 case WLAN_EID_CF_PARAMS: 1131 cf_param_set = 1132 (struct ieee_types_cf_param_set *) current_ptr; 1133 memcpy(&bss_entry->ss_param_set.cf_param_set, 1134 cf_param_set, 1135 sizeof(struct ieee_types_cf_param_set)); 1136 break; 1137 1138 case WLAN_EID_IBSS_PARAMS: 1139 ibss_param_set = 1140 (struct ieee_types_ibss_param_set *) 1141 current_ptr; 1142 memcpy(&bss_entry->ss_param_set.ibss_param_set, 1143 ibss_param_set, 1144 sizeof(struct ieee_types_ibss_param_set)); 1145 break; 1146 1147 case WLAN_EID_ERP_INFO: 1148 bss_entry->erp_flags = *(current_ptr + 2); 1149 break; 1150 1151 case WLAN_EID_EXT_SUPP_RATES: 1152 /* 1153 * Only process extended supported rate 1154 * if data rate is already found. 1155 * Data rate IE should come before 1156 * extended supported rate IE 1157 */ 1158 if (found_data_rate_ie) { 1159 if ((element_len + rate_size) > 1160 MWIFIEX_SUPPORTED_RATES) 1161 bytes_to_copy = 1162 (MWIFIEX_SUPPORTED_RATES - 1163 rate_size); 1164 else 1165 bytes_to_copy = element_len; 1166 1167 rate = (u8 *) bss_entry->data_rates; 1168 rate += rate_size; 1169 memcpy(rate, current_ptr + 2, bytes_to_copy); 1170 1171 rate = (u8 *) bss_entry->supported_rates; 1172 rate += rate_size; 1173 memcpy(rate, current_ptr + 2, bytes_to_copy); 1174 } 1175 break; 1176 1177 case WLAN_EID_VENDOR_SPECIFIC: 1178 vendor_ie = (struct ieee_types_vendor_specific *) 1179 current_ptr; 1180 1181 if (!memcmp 1182 (vendor_ie->vend_hdr.oui, wpa_oui, 1183 sizeof(wpa_oui))) { 1184 bss_entry->bcn_wpa_ie = 1185 (struct ieee_types_vendor_specific *) 1186 current_ptr; 1187 bss_entry->wpa_offset = (u16) 1188 (current_ptr - bss_entry->beacon_buf); 1189 } else if (!memcmp(vendor_ie->vend_hdr.oui, wmm_oui, 1190 sizeof(wmm_oui))) { 1191 if (total_ie_len == 1192 sizeof(struct ieee_types_wmm_parameter) || 1193 total_ie_len == 1194 sizeof(struct ieee_types_wmm_info)) 1195 /* 1196 * Only accept and copy the WMM IE if 1197 * it matches the size expected for the 1198 * WMM Info IE or the WMM Parameter IE. 1199 */ 1200 memcpy((u8 *) &bss_entry->wmm_ie, 1201 current_ptr, total_ie_len); 1202 } 1203 break; 1204 case WLAN_EID_RSN: 1205 bss_entry->bcn_rsn_ie = 1206 (struct ieee_types_generic *) current_ptr; 1207 bss_entry->rsn_offset = (u16) (current_ptr - 1208 bss_entry->beacon_buf); 1209 break; 1210 case WLAN_EID_BSS_AC_ACCESS_DELAY: 1211 bss_entry->bcn_wapi_ie = 1212 (struct ieee_types_generic *) current_ptr; 1213 bss_entry->wapi_offset = (u16) (current_ptr - 1214 bss_entry->beacon_buf); 1215 break; 1216 case WLAN_EID_HT_CAPABILITY: 1217 bss_entry->bcn_ht_cap = (struct ieee80211_ht_cap *) 1218 (current_ptr + 1219 sizeof(struct ieee_types_header)); 1220 bss_entry->ht_cap_offset = (u16) (current_ptr + 1221 sizeof(struct ieee_types_header) - 1222 bss_entry->beacon_buf); 1223 break; 1224 case WLAN_EID_HT_INFORMATION: 1225 bss_entry->bcn_ht_info = (struct ieee80211_ht_info *) 1226 (current_ptr + 1227 sizeof(struct ieee_types_header)); 1228 bss_entry->ht_info_offset = (u16) (current_ptr + 1229 sizeof(struct ieee_types_header) - 1230 bss_entry->beacon_buf); 1231 break; 1232 case WLAN_EID_BSS_COEX_2040: 1233 bss_entry->bcn_bss_co_2040 = (u8 *) (current_ptr + 1234 sizeof(struct ieee_types_header)); 1235 bss_entry->bss_co_2040_offset = (u16) (current_ptr + 1236 sizeof(struct ieee_types_header) - 1237 bss_entry->beacon_buf); 1238 break; 1239 case WLAN_EID_EXT_CAPABILITY: 1240 bss_entry->bcn_ext_cap = (u8 *) (current_ptr + 1241 sizeof(struct ieee_types_header)); 1242 bss_entry->ext_cap_offset = (u16) (current_ptr + 1243 sizeof(struct ieee_types_header) - 1244 bss_entry->beacon_buf); 1245 break; 1246 default: 1247 break; 1248 } 1249 1250 current_ptr += element_len + 2; 1251 1252 /* Need to account for IE ID and IE Len */ 1253 bytes_left -= (element_len + 2); 1254 1255 } /* while (bytes_left > 2) */ 1256 return ret; 1257} 1258 1259/* 1260 * This function converts radio type scan parameter to a band configuration 1261 * to be used in join command. 1262 */ 1263static u8 1264mwifiex_radio_type_to_band(u8 radio_type) 1265{ 1266 switch (radio_type) { 1267 case HostCmd_SCAN_RADIO_TYPE_A: 1268 return BAND_A; 1269 case HostCmd_SCAN_RADIO_TYPE_BG: 1270 default: 1271 return BAND_G; 1272 } 1273} 1274 1275/* 1276 * This is an internal function used to start a scan based on an input 1277 * configuration. 1278 * 1279 * This uses the input user scan configuration information when provided in 1280 * order to send the appropriate scan commands to firmware to populate or 1281 * update the internal driver scan table. 1282 */ 1283static int mwifiex_scan_networks(struct mwifiex_private *priv, 1284 const struct mwifiex_user_scan_cfg *user_scan_in) 1285{ 1286 int ret = 0; 1287 struct mwifiex_adapter *adapter = priv->adapter; 1288 struct cmd_ctrl_node *cmd_node; 1289 union mwifiex_scan_cmd_config_tlv *scan_cfg_out; 1290 struct mwifiex_ie_types_chan_list_param_set *chan_list_out; 1291 u32 buf_size; 1292 struct mwifiex_chan_scan_param_set *scan_chan_list; 1293 u8 filtered_scan; 1294 u8 scan_current_chan_only; 1295 u8 max_chan_per_scan; 1296 unsigned long flags; 1297 1298 if (adapter->scan_processing) { 1299 dev_dbg(adapter->dev, "cmd: Scan already in process...\n"); 1300 return ret; 1301 } 1302 1303 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags); 1304 adapter->scan_processing = true; 1305 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags); 1306 1307 if (priv->scan_block) { 1308 dev_dbg(adapter->dev, 1309 "cmd: Scan is blocked during association...\n"); 1310 return ret; 1311 } 1312 1313 scan_cfg_out = kzalloc(sizeof(union mwifiex_scan_cmd_config_tlv), 1314 GFP_KERNEL); 1315 if (!scan_cfg_out) { 1316 dev_err(adapter->dev, "failed to alloc scan_cfg_out\n"); 1317 return -ENOMEM; 1318 } 1319 1320 buf_size = sizeof(struct mwifiex_chan_scan_param_set) * 1321 MWIFIEX_USER_SCAN_CHAN_MAX; 1322 scan_chan_list = kzalloc(buf_size, GFP_KERNEL); 1323 if (!scan_chan_list) { 1324 dev_err(adapter->dev, "failed to alloc scan_chan_list\n"); 1325 kfree(scan_cfg_out); 1326 return -ENOMEM; 1327 } 1328 1329 mwifiex_config_scan(priv, user_scan_in, &scan_cfg_out->config, 1330 &chan_list_out, scan_chan_list, &max_chan_per_scan, 1331 &filtered_scan, &scan_current_chan_only); 1332 1333 ret = mwifiex_scan_channel_list(priv, max_chan_per_scan, filtered_scan, 1334 &scan_cfg_out->config, chan_list_out, 1335 scan_chan_list); 1336 1337 /* Get scan command from scan_pending_q and put to cmd_pending_q */ 1338 if (!ret) { 1339 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags); 1340 if (!list_empty(&adapter->scan_pending_q)) { 1341 cmd_node = list_first_entry(&adapter->scan_pending_q, 1342 struct cmd_ctrl_node, list); 1343 list_del(&cmd_node->list); 1344 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, 1345 flags); 1346 adapter->cmd_queued = cmd_node; 1347 mwifiex_insert_cmd_to_pending_q(adapter, cmd_node, 1348 true); 1349 } else { 1350 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, 1351 flags); 1352 } 1353 } else { 1354 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags); 1355 adapter->scan_processing = true; 1356 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags); 1357 } 1358 1359 kfree(scan_cfg_out); 1360 kfree(scan_chan_list); 1361 return ret; 1362} 1363 1364/* 1365 * Sends IOCTL request to start a scan with user configurations. 1366 * 1367 * This function allocates the IOCTL request buffer, fills it 1368 * with requisite parameters and calls the IOCTL handler. 1369 * 1370 * Upon completion, it also generates a wireless event to notify 1371 * applications. 1372 */ 1373int mwifiex_set_user_scan_ioctl(struct mwifiex_private *priv, 1374 struct mwifiex_user_scan_cfg *scan_req) 1375{ 1376 int status; 1377 1378 status = mwifiex_scan_networks(priv, scan_req); 1379 queue_work(priv->adapter->workqueue, &priv->adapter->main_work); 1380 1381 return status; 1382} 1383 1384/* 1385 * This function prepares a scan command to be sent to the firmware. 1386 * 1387 * This uses the scan command configuration sent to the command processing 1388 * module in command preparation stage to configure a scan command structure 1389 * to send to firmware. 1390 * 1391 * The fixed fields specifying the BSS type and BSSID filters as well as a 1392 * variable number/length of TLVs are sent in the command to firmware. 1393 * 1394 * Preparation also includes - 1395 * - Setting command ID, and proper size 1396 * - Ensuring correct endian-ness 1397 */ 1398int mwifiex_cmd_802_11_scan(struct host_cmd_ds_command *cmd, 1399 struct mwifiex_scan_cmd_config *scan_cfg) 1400{ 1401 struct host_cmd_ds_802_11_scan *scan_cmd = &cmd->params.scan; 1402 1403 /* Set fixed field variables in scan command */ 1404 scan_cmd->bss_mode = scan_cfg->bss_mode; 1405 memcpy(scan_cmd->bssid, scan_cfg->specific_bssid, 1406 sizeof(scan_cmd->bssid)); 1407 memcpy(scan_cmd->tlv_buffer, scan_cfg->tlv_buf, scan_cfg->tlv_buf_len); 1408 1409 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_SCAN); 1410 1411 /* Size is equal to the sizeof(fixed portions) + the TLV len + header */ 1412 cmd->size = cpu_to_le16((u16) (sizeof(scan_cmd->bss_mode) 1413 + sizeof(scan_cmd->bssid) 1414 + scan_cfg->tlv_buf_len + S_DS_GEN)); 1415 1416 return 0; 1417} 1418 1419/* 1420 * This function checks compatibility of requested network with current 1421 * driver settings. 1422 */ 1423int mwifiex_check_network_compatibility(struct mwifiex_private *priv, 1424 struct mwifiex_bssdescriptor *bss_desc) 1425{ 1426 int ret = -1; 1427 1428 if (!bss_desc) 1429 return -1; 1430 1431 if ((mwifiex_get_cfp(priv, (u8) bss_desc->bss_band, 1432 (u16) bss_desc->channel, 0))) { 1433 switch (priv->bss_mode) { 1434 case NL80211_IFTYPE_STATION: 1435 case NL80211_IFTYPE_ADHOC: 1436 ret = mwifiex_is_network_compatible(priv, bss_desc, 1437 priv->bss_mode); 1438 if (ret) 1439 dev_err(priv->adapter->dev, "cannot find ssid " 1440 "%s\n", bss_desc->ssid.ssid); 1441 break; 1442 default: 1443 ret = 0; 1444 } 1445 } 1446 1447 return ret; 1448} 1449 1450static int 1451mwifiex_update_curr_bss_params(struct mwifiex_private *priv, u8 *bssid, 1452 s32 rssi, const u8 *ie_buf, size_t ie_len, 1453 u16 beacon_period, u16 cap_info_bitmap, u8 band) 1454{ 1455 struct mwifiex_bssdescriptor *bss_desc; 1456 int ret; 1457 unsigned long flags; 1458 u8 *beacon_ie; 1459 1460 /* Allocate and fill new bss descriptor */ 1461 bss_desc = kzalloc(sizeof(struct mwifiex_bssdescriptor), 1462 GFP_KERNEL); 1463 if (!bss_desc) { 1464 dev_err(priv->adapter->dev, " failed to alloc bss_desc\n"); 1465 return -ENOMEM; 1466 } 1467 1468 beacon_ie = kmemdup(ie_buf, ie_len, GFP_KERNEL); 1469 if (!beacon_ie) { 1470 kfree(bss_desc); 1471 dev_err(priv->adapter->dev, " failed to alloc beacon_ie\n"); 1472 return -ENOMEM; 1473 } 1474 1475 ret = mwifiex_fill_new_bss_desc(priv, bssid, rssi, beacon_ie, 1476 ie_len, beacon_period, 1477 cap_info_bitmap, band, bss_desc); 1478 if (ret) 1479 goto done; 1480 1481 ret = mwifiex_check_network_compatibility(priv, bss_desc); 1482 if (ret) 1483 goto done; 1484 1485 /* Update current bss descriptor parameters */ 1486 spin_lock_irqsave(&priv->curr_bcn_buf_lock, flags); 1487 priv->curr_bss_params.bss_descriptor.bcn_wpa_ie = NULL; 1488 priv->curr_bss_params.bss_descriptor.wpa_offset = 0; 1489 priv->curr_bss_params.bss_descriptor.bcn_rsn_ie = NULL; 1490 priv->curr_bss_params.bss_descriptor.rsn_offset = 0; 1491 priv->curr_bss_params.bss_descriptor.bcn_wapi_ie = NULL; 1492 priv->curr_bss_params.bss_descriptor.wapi_offset = 0; 1493 priv->curr_bss_params.bss_descriptor.bcn_ht_cap = NULL; 1494 priv->curr_bss_params.bss_descriptor.ht_cap_offset = 1495 0; 1496 priv->curr_bss_params.bss_descriptor.bcn_ht_info = NULL; 1497 priv->curr_bss_params.bss_descriptor.ht_info_offset = 1498 0; 1499 priv->curr_bss_params.bss_descriptor.bcn_bss_co_2040 = 1500 NULL; 1501 priv->curr_bss_params.bss_descriptor. 1502 bss_co_2040_offset = 0; 1503 priv->curr_bss_params.bss_descriptor.bcn_ext_cap = NULL; 1504 priv->curr_bss_params.bss_descriptor.ext_cap_offset = 0; 1505 priv->curr_bss_params.bss_descriptor.beacon_buf = NULL; 1506 priv->curr_bss_params.bss_descriptor.beacon_buf_size = 1507 0; 1508 1509 /* Make a copy of current BSSID descriptor */ 1510 memcpy(&priv->curr_bss_params.bss_descriptor, bss_desc, 1511 sizeof(priv->curr_bss_params.bss_descriptor)); 1512 mwifiex_save_curr_bcn(priv); 1513 spin_unlock_irqrestore(&priv->curr_bcn_buf_lock, flags); 1514 1515done: 1516 kfree(bss_desc); 1517 kfree(beacon_ie); 1518 return 0; 1519} 1520 1521/* 1522 * This function handles the command response of scan. 1523 * 1524 * The response buffer for the scan command has the following 1525 * memory layout: 1526 * 1527 * .-------------------------------------------------------------. 1528 * | Header (4 * sizeof(t_u16)): Standard command response hdr | 1529 * .-------------------------------------------------------------. 1530 * | BufSize (t_u16) : sizeof the BSS Description data | 1531 * .-------------------------------------------------------------. 1532 * | NumOfSet (t_u8) : Number of BSS Descs returned | 1533 * .-------------------------------------------------------------. 1534 * | BSSDescription data (variable, size given in BufSize) | 1535 * .-------------------------------------------------------------. 1536 * | TLV data (variable, size calculated using Header->Size, | 1537 * | BufSize and sizeof the fixed fields above) | 1538 * .-------------------------------------------------------------. 1539 */ 1540int mwifiex_ret_802_11_scan(struct mwifiex_private *priv, 1541 struct host_cmd_ds_command *resp) 1542{ 1543 int ret = 0; 1544 struct mwifiex_adapter *adapter = priv->adapter; 1545 struct cmd_ctrl_node *cmd_node; 1546 struct host_cmd_ds_802_11_scan_rsp *scan_rsp; 1547 struct mwifiex_ie_types_data *tlv_data; 1548 struct mwifiex_ie_types_tsf_timestamp *tsf_tlv; 1549 u8 *bss_info; 1550 u32 scan_resp_size; 1551 u32 bytes_left; 1552 u32 idx; 1553 u32 tlv_buf_size; 1554 struct mwifiex_chan_freq_power *cfp; 1555 struct mwifiex_ie_types_chan_band_list_param_set *chan_band_tlv; 1556 struct chan_band_param_set *chan_band; 1557 u8 is_bgscan_resp; 1558 unsigned long flags; 1559 struct cfg80211_bss *bss; 1560 1561 is_bgscan_resp = (le16_to_cpu(resp->command) 1562 == HostCmd_CMD_802_11_BG_SCAN_QUERY); 1563 if (is_bgscan_resp) 1564 scan_rsp = &resp->params.bg_scan_query_resp.scan_resp; 1565 else 1566 scan_rsp = &resp->params.scan_resp; 1567 1568 1569 if (scan_rsp->number_of_sets > MWIFIEX_MAX_AP) { 1570 dev_err(adapter->dev, "SCAN_RESP: too many AP returned (%d)\n", 1571 scan_rsp->number_of_sets); 1572 ret = -1; 1573 goto done; 1574 } 1575 1576 bytes_left = le16_to_cpu(scan_rsp->bss_descript_size); 1577 dev_dbg(adapter->dev, "info: SCAN_RESP: bss_descript_size %d\n", 1578 bytes_left); 1579 1580 scan_resp_size = le16_to_cpu(resp->size); 1581 1582 dev_dbg(adapter->dev, 1583 "info: SCAN_RESP: returned %d APs before parsing\n", 1584 scan_rsp->number_of_sets); 1585 1586 bss_info = scan_rsp->bss_desc_and_tlv_buffer; 1587 1588 /* 1589 * The size of the TLV buffer is equal to the entire command response 1590 * size (scan_resp_size) minus the fixed fields (sizeof()'s), the 1591 * BSS Descriptions (bss_descript_size as bytesLef) and the command 1592 * response header (S_DS_GEN) 1593 */ 1594 tlv_buf_size = scan_resp_size - (bytes_left 1595 + sizeof(scan_rsp->bss_descript_size) 1596 + sizeof(scan_rsp->number_of_sets) 1597 + S_DS_GEN); 1598 1599 tlv_data = (struct mwifiex_ie_types_data *) (scan_rsp-> 1600 bss_desc_and_tlv_buffer + 1601 bytes_left); 1602 1603 /* Search the TLV buffer space in the scan response for any valid 1604 TLVs */ 1605 mwifiex_ret_802_11_scan_get_tlv_ptrs(adapter, tlv_data, tlv_buf_size, 1606 TLV_TYPE_TSFTIMESTAMP, 1607 (struct mwifiex_ie_types_data **) 1608 &tsf_tlv); 1609 1610 /* Search the TLV buffer space in the scan response for any valid 1611 TLVs */ 1612 mwifiex_ret_802_11_scan_get_tlv_ptrs(adapter, tlv_data, tlv_buf_size, 1613 TLV_TYPE_CHANNELBANDLIST, 1614 (struct mwifiex_ie_types_data **) 1615 &chan_band_tlv); 1616 1617 for (idx = 0; idx < scan_rsp->number_of_sets && bytes_left; idx++) { 1618 u8 bssid[ETH_ALEN]; 1619 s32 rssi; 1620 const u8 *ie_buf; 1621 size_t ie_len; 1622 u16 channel = 0; 1623 u64 network_tsf = 0; 1624 u16 beacon_size = 0; 1625 u32 curr_bcn_bytes; 1626 u32 freq; 1627 u16 beacon_period; 1628 u16 cap_info_bitmap; 1629 u8 *current_ptr; 1630 struct mwifiex_bcn_param *bcn_param; 1631 1632 if (bytes_left >= sizeof(beacon_size)) { 1633 /* Extract & convert beacon size from command buffer */ 1634 memcpy(&beacon_size, bss_info, sizeof(beacon_size)); 1635 bytes_left -= sizeof(beacon_size); 1636 bss_info += sizeof(beacon_size); 1637 } 1638 1639 if (!beacon_size || beacon_size > bytes_left) { 1640 bss_info += bytes_left; 1641 bytes_left = 0; 1642 return -1; 1643 } 1644 1645 /* Initialize the current working beacon pointer for this BSS 1646 * iteration */ 1647 current_ptr = bss_info; 1648 1649 /* Advance the return beacon pointer past the current beacon */ 1650 bss_info += beacon_size; 1651 bytes_left -= beacon_size; 1652 1653 curr_bcn_bytes = beacon_size; 1654 1655 /* 1656 * First 5 fields are bssid, RSSI, time stamp, beacon interval, 1657 * and capability information 1658 */ 1659 if (curr_bcn_bytes < sizeof(struct mwifiex_bcn_param)) { 1660 dev_err(adapter->dev, 1661 "InterpretIE: not enough bytes left\n"); 1662 continue; 1663 } 1664 bcn_param = (struct mwifiex_bcn_param *)current_ptr; 1665 current_ptr += sizeof(*bcn_param); 1666 curr_bcn_bytes -= sizeof(*bcn_param); 1667 1668 memcpy(bssid, bcn_param->bssid, ETH_ALEN); 1669 1670 rssi = (s32) (bcn_param->rssi); 1671 dev_dbg(adapter->dev, "info: InterpretIE: RSSI=%02X\n", rssi); 1672 1673 beacon_period = le16_to_cpu(bcn_param->beacon_period); 1674 1675 cap_info_bitmap = le16_to_cpu(bcn_param->cap_info_bitmap); 1676 dev_dbg(adapter->dev, "info: InterpretIE: capabilities=0x%X\n", 1677 cap_info_bitmap); 1678 1679 /* Rest of the current buffer are IE's */ 1680 ie_buf = current_ptr; 1681 ie_len = curr_bcn_bytes; 1682 dev_dbg(adapter->dev, 1683 "info: InterpretIE: IELength for this AP = %d\n", 1684 curr_bcn_bytes); 1685 1686 while (curr_bcn_bytes >= sizeof(struct ieee_types_header)) { 1687 u8 element_id, element_len; 1688 1689 element_id = *current_ptr; 1690 element_len = *(current_ptr + 1); 1691 if (curr_bcn_bytes < element_len + 1692 sizeof(struct ieee_types_header)) { 1693 dev_err(priv->adapter->dev, 1694 "%s: bytes left < IE length\n", 1695 __func__); 1696 goto done; 1697 } 1698 if (element_id == WLAN_EID_DS_PARAMS) { 1699 channel = *(u8 *) (current_ptr + 1700 sizeof(struct ieee_types_header)); 1701 break; 1702 } 1703 1704 current_ptr += element_len + 1705 sizeof(struct ieee_types_header); 1706 curr_bcn_bytes -= element_len + 1707 sizeof(struct ieee_types_header); 1708 } 1709 1710 /* 1711 * If the TSF TLV was appended to the scan results, save this 1712 * entry's TSF value in the networkTSF field.The networkTSF is 1713 * the firmware's TSF value at the time the beacon or probe 1714 * response was received. 1715 */ 1716 if (tsf_tlv) 1717 memcpy(&network_tsf, 1718 &tsf_tlv->tsf_data[idx * TSF_DATA_SIZE], 1719 sizeof(network_tsf)); 1720 1721 if (channel) { 1722 struct ieee80211_channel *chan; 1723 u8 band; 1724 1725 band = BAND_G; 1726 if (chan_band_tlv) { 1727 chan_band = 1728 &chan_band_tlv->chan_band_param[idx]; 1729 band = mwifiex_radio_type_to_band( 1730 chan_band->radio_type 1731 & (BIT(0) | BIT(1))); 1732 } 1733 1734 cfp = mwifiex_get_cfp(priv, band, channel, 0); 1735 1736 freq = cfp ? cfp->freq : 0; 1737 1738 chan = ieee80211_get_channel(priv->wdev->wiphy, freq); 1739 1740 if (chan && !(chan->flags & IEEE80211_CHAN_DISABLED)) { 1741 bss = cfg80211_inform_bss(priv->wdev->wiphy, 1742 chan, bssid, network_tsf, 1743 cap_info_bitmap, beacon_period, 1744 ie_buf, ie_len, rssi, GFP_KERNEL); 1745 *(u8 *)bss->priv = band; 1746 cfg80211_put_bss(bss); 1747 1748 if (priv->media_connected && 1749 !memcmp(bssid, 1750 priv->curr_bss_params.bss_descriptor 1751 .mac_address, ETH_ALEN)) 1752 mwifiex_update_curr_bss_params 1753 (priv, bssid, rssi, 1754 ie_buf, ie_len, 1755 beacon_period, 1756 cap_info_bitmap, band); 1757 } 1758 } else { 1759 dev_dbg(adapter->dev, "missing BSS channel IE\n"); 1760 } 1761 } 1762 1763 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags); 1764 if (list_empty(&adapter->scan_pending_q)) { 1765 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags); 1766 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags); 1767 adapter->scan_processing = false; 1768 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags); 1769 1770 /* Need to indicate IOCTL complete */ 1771 if (adapter->curr_cmd->wait_q_enabled) { 1772 adapter->cmd_wait_q.status = 0; 1773 mwifiex_complete_cmd(adapter, adapter->curr_cmd); 1774 } 1775 if (priv->report_scan_result) 1776 priv->report_scan_result = false; 1777 if (priv->scan_pending_on_block) { 1778 priv->scan_pending_on_block = false; 1779 up(&priv->async_sem); 1780 } 1781 1782 if (priv->user_scan_cfg) { 1783 dev_dbg(priv->adapter->dev, 1784 "info: %s: sending scan results\n", __func__); 1785 cfg80211_scan_done(priv->scan_request, 0); 1786 priv->scan_request = NULL; 1787 kfree(priv->user_scan_cfg); 1788 priv->user_scan_cfg = NULL; 1789 } 1790 } else { 1791 /* Get scan command from scan_pending_q and put to 1792 cmd_pending_q */ 1793 cmd_node = list_first_entry(&adapter->scan_pending_q, 1794 struct cmd_ctrl_node, list); 1795 list_del(&cmd_node->list); 1796 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags); 1797 1798 mwifiex_insert_cmd_to_pending_q(adapter, cmd_node, true); 1799 } 1800 1801done: 1802 return ret; 1803} 1804 1805/* 1806 * This function prepares command for background scan query. 1807 * 1808 * Preparation includes - 1809 * - Setting command ID and proper size 1810 * - Setting background scan flush parameter 1811 * - Ensuring correct endian-ness 1812 */ 1813int mwifiex_cmd_802_11_bg_scan_query(struct host_cmd_ds_command *cmd) 1814{ 1815 struct host_cmd_ds_802_11_bg_scan_query *bg_query = 1816 &cmd->params.bg_scan_query; 1817 1818 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_BG_SCAN_QUERY); 1819 cmd->size = cpu_to_le16(sizeof(struct host_cmd_ds_802_11_bg_scan_query) 1820 + S_DS_GEN); 1821 1822 bg_query->flush = 1; 1823 1824 return 0; 1825} 1826 1827/* 1828 * This function inserts scan command node to the scan pending queue. 1829 */ 1830void 1831mwifiex_queue_scan_cmd(struct mwifiex_private *priv, 1832 struct cmd_ctrl_node *cmd_node) 1833{ 1834 struct mwifiex_adapter *adapter = priv->adapter; 1835 unsigned long flags; 1836 1837 cmd_node->wait_q_enabled = true; 1838 cmd_node->condition = &adapter->scan_wait_q_woken; 1839 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags); 1840 list_add_tail(&cmd_node->list, &adapter->scan_pending_q); 1841 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags); 1842} 1843 1844/* 1845 * This function sends a scan command for all available channels to the 1846 * firmware, filtered on a specific SSID. 1847 */ 1848static int mwifiex_scan_specific_ssid(struct mwifiex_private *priv, 1849 struct cfg80211_ssid *req_ssid) 1850{ 1851 struct mwifiex_adapter *adapter = priv->adapter; 1852 int ret = 0; 1853 struct mwifiex_user_scan_cfg *scan_cfg; 1854 1855 if (!req_ssid) 1856 return -1; 1857 1858 if (adapter->scan_processing) { 1859 dev_dbg(adapter->dev, "cmd: Scan already in process...\n"); 1860 return ret; 1861 } 1862 1863 if (priv->scan_block) { 1864 dev_dbg(adapter->dev, 1865 "cmd: Scan is blocked during association...\n"); 1866 return ret; 1867 } 1868 1869 scan_cfg = kzalloc(sizeof(struct mwifiex_user_scan_cfg), GFP_KERNEL); 1870 if (!scan_cfg) { 1871 dev_err(adapter->dev, "failed to alloc scan_cfg\n"); 1872 return -ENOMEM; 1873 } 1874 1875 scan_cfg->ssid_list = req_ssid; 1876 scan_cfg->num_ssids = 1; 1877 1878 ret = mwifiex_scan_networks(priv, scan_cfg); 1879 1880 kfree(scan_cfg); 1881 return ret; 1882} 1883 1884/* 1885 * Sends IOCTL request to start a scan. 1886 * 1887 * This function allocates the IOCTL request buffer, fills it 1888 * with requisite parameters and calls the IOCTL handler. 1889 * 1890 * Scan command can be issued for both normal scan and specific SSID 1891 * scan, depending upon whether an SSID is provided or not. 1892 */ 1893int mwifiex_request_scan(struct mwifiex_private *priv, 1894 struct cfg80211_ssid *req_ssid) 1895{ 1896 int ret; 1897 1898 if (down_interruptible(&priv->async_sem)) { 1899 dev_err(priv->adapter->dev, "%s: acquire semaphore\n", 1900 __func__); 1901 return -1; 1902 } 1903 priv->scan_pending_on_block = true; 1904 1905 priv->adapter->scan_wait_q_woken = false; 1906 1907 if (req_ssid && req_ssid->ssid_len != 0) 1908 /* Specific SSID scan */ 1909 ret = mwifiex_scan_specific_ssid(priv, req_ssid); 1910 else 1911 /* Normal scan */ 1912 ret = mwifiex_scan_networks(priv, NULL); 1913 1914 if (!ret) 1915 ret = mwifiex_wait_queue_complete(priv->adapter); 1916 1917 if (ret == -1) { 1918 priv->scan_pending_on_block = false; 1919 up(&priv->async_sem); 1920 } 1921 1922 return ret; 1923} 1924 1925/* 1926 * This function appends the vendor specific IE TLV to a buffer. 1927 */ 1928int 1929mwifiex_cmd_append_vsie_tlv(struct mwifiex_private *priv, 1930 u16 vsie_mask, u8 **buffer) 1931{ 1932 int id, ret_len = 0; 1933 struct mwifiex_ie_types_vendor_param_set *vs_param_set; 1934 1935 if (!buffer) 1936 return 0; 1937 if (!(*buffer)) 1938 return 0; 1939 1940 /* 1941 * Traverse through the saved vendor specific IE array and append 1942 * the selected(scan/assoc/adhoc) IE as TLV to the command 1943 */ 1944 for (id = 0; id < MWIFIEX_MAX_VSIE_NUM; id++) { 1945 if (priv->vs_ie[id].mask & vsie_mask) { 1946 vs_param_set = 1947 (struct mwifiex_ie_types_vendor_param_set *) 1948 *buffer; 1949 vs_param_set->header.type = 1950 cpu_to_le16(TLV_TYPE_PASSTHROUGH); 1951 vs_param_set->header.len = 1952 cpu_to_le16((((u16) priv->vs_ie[id].ie[1]) 1953 & 0x00FF) + 2); 1954 memcpy(vs_param_set->ie, priv->vs_ie[id].ie, 1955 le16_to_cpu(vs_param_set->header.len)); 1956 *buffer += le16_to_cpu(vs_param_set->header.len) + 1957 sizeof(struct mwifiex_ie_types_header); 1958 ret_len += le16_to_cpu(vs_param_set->header.len) + 1959 sizeof(struct mwifiex_ie_types_header); 1960 } 1961 } 1962 return ret_len; 1963} 1964 1965/* 1966 * This function saves a beacon buffer of the current BSS descriptor. 1967 * 1968 * The current beacon buffer is saved so that it can be restored in the 1969 * following cases that makes the beacon buffer not to contain the current 1970 * ssid's beacon buffer. 1971 * - The current ssid was not found somehow in the last scan. 1972 * - The current ssid was the last entry of the scan table and overloaded. 1973 */ 1974void 1975mwifiex_save_curr_bcn(struct mwifiex_private *priv) 1976{ 1977 struct mwifiex_bssdescriptor *curr_bss = 1978 &priv->curr_bss_params.bss_descriptor; 1979 1980 if (!curr_bss->beacon_buf_size) 1981 return; 1982 1983 /* allocate beacon buffer at 1st time; or if it's size has changed */ 1984 if (!priv->curr_bcn_buf || 1985 priv->curr_bcn_size != curr_bss->beacon_buf_size) { 1986 priv->curr_bcn_size = curr_bss->beacon_buf_size; 1987 1988 kfree(priv->curr_bcn_buf); 1989 priv->curr_bcn_buf = kmalloc(curr_bss->beacon_buf_size, 1990 GFP_ATOMIC); 1991 if (!priv->curr_bcn_buf) { 1992 dev_err(priv->adapter->dev, 1993 "failed to alloc curr_bcn_buf\n"); 1994 return; 1995 } 1996 } 1997 1998 memcpy(priv->curr_bcn_buf, curr_bss->beacon_buf, 1999 curr_bss->beacon_buf_size); 2000 dev_dbg(priv->adapter->dev, "info: current beacon saved %d\n", 2001 priv->curr_bcn_size); 2002 2003 curr_bss->beacon_buf = priv->curr_bcn_buf; 2004 2005 /* adjust the pointers in the current BSS descriptor */ 2006 if (curr_bss->bcn_wpa_ie) 2007 curr_bss->bcn_wpa_ie = 2008 (struct ieee_types_vendor_specific *) 2009 (curr_bss->beacon_buf + 2010 curr_bss->wpa_offset); 2011 2012 if (curr_bss->bcn_rsn_ie) 2013 curr_bss->bcn_rsn_ie = (struct ieee_types_generic *) 2014 (curr_bss->beacon_buf + 2015 curr_bss->rsn_offset); 2016 2017 if (curr_bss->bcn_ht_cap) 2018 curr_bss->bcn_ht_cap = (struct ieee80211_ht_cap *) 2019 (curr_bss->beacon_buf + 2020 curr_bss->ht_cap_offset); 2021 2022 if (curr_bss->bcn_ht_info) 2023 curr_bss->bcn_ht_info = (struct ieee80211_ht_info *) 2024 (curr_bss->beacon_buf + 2025 curr_bss->ht_info_offset); 2026 2027 if (curr_bss->bcn_bss_co_2040) 2028 curr_bss->bcn_bss_co_2040 = 2029 (u8 *) (curr_bss->beacon_buf + 2030 curr_bss->bss_co_2040_offset); 2031 2032 if (curr_bss->bcn_ext_cap) 2033 curr_bss->bcn_ext_cap = (u8 *) (curr_bss->beacon_buf + 2034 curr_bss->ext_cap_offset); 2035} 2036 2037/* 2038 * This function frees the current BSS descriptor beacon buffer. 2039 */ 2040void 2041mwifiex_free_curr_bcn(struct mwifiex_private *priv) 2042{ 2043 kfree(priv->curr_bcn_buf); 2044 priv->curr_bcn_buf = NULL; 2045} 2046