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Merge remote-tracking branch 'omap_dss2/for-next'
[deliverable/linux.git] / drivers / net / wireless / marvell / mwifiex / scan.c
1 /*
2 * Marvell Wireless LAN device driver: scan ioctl and command handling
3 *
4 * Copyright (C) 2011-2014, Marvell International Ltd.
5 *
6 * This software file (the "File") is distributed by Marvell International
7 * Ltd. under the terms of the GNU General Public License Version 2, June 1991
8 * (the "License"). You may use, redistribute and/or modify this File in
9 * accordance with the terms and conditions of the License, a copy of which
10 * is available by writing to the Free Software Foundation, Inc.,
11 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
12 * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
13 *
14 * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
16 * ARE EXPRESSLY DISCLAIMED. The License provides additional details about
17 * this warranty disclaimer.
18 */
19
20 #include "decl.h"
21 #include "ioctl.h"
22 #include "util.h"
23 #include "fw.h"
24 #include "main.h"
25 #include "11n.h"
26 #include "cfg80211.h"
27
28 /* The maximum number of channels the firmware can scan per command */
29 #define MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN 14
30
31 #define MWIFIEX_DEF_CHANNELS_PER_SCAN_CMD 4
32
33 /* Memory needed to store a max sized Channel List TLV for a firmware scan */
34 #define CHAN_TLV_MAX_SIZE (sizeof(struct mwifiex_ie_types_header) \
35 + (MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN \
36 *sizeof(struct mwifiex_chan_scan_param_set)))
37
38 /* Memory needed to store supported rate */
39 #define RATE_TLV_MAX_SIZE (sizeof(struct mwifiex_ie_types_rates_param_set) \
40 + HOSTCMD_SUPPORTED_RATES)
41
42 /* Memory needed to store a max number/size WildCard SSID TLV for a firmware
43 scan */
44 #define WILDCARD_SSID_TLV_MAX_SIZE \
45 (MWIFIEX_MAX_SSID_LIST_LENGTH * \
46 (sizeof(struct mwifiex_ie_types_wildcard_ssid_params) \
47 + IEEE80211_MAX_SSID_LEN))
48
49 /* Maximum memory needed for a mwifiex_scan_cmd_config with all TLVs at max */
50 #define MAX_SCAN_CFG_ALLOC (sizeof(struct mwifiex_scan_cmd_config) \
51 + sizeof(struct mwifiex_ie_types_num_probes) \
52 + sizeof(struct mwifiex_ie_types_htcap) \
53 + CHAN_TLV_MAX_SIZE \
54 + RATE_TLV_MAX_SIZE \
55 + WILDCARD_SSID_TLV_MAX_SIZE)
56
57
58 union mwifiex_scan_cmd_config_tlv {
59 /* Scan configuration (variable length) */
60 struct mwifiex_scan_cmd_config config;
61 /* Max allocated block */
62 u8 config_alloc_buf[MAX_SCAN_CFG_ALLOC];
63 };
64
65 enum cipher_suite {
66 CIPHER_SUITE_TKIP,
67 CIPHER_SUITE_CCMP,
68 CIPHER_SUITE_MAX
69 };
70 static u8 mwifiex_wpa_oui[CIPHER_SUITE_MAX][4] = {
71 { 0x00, 0x50, 0xf2, 0x02 }, /* TKIP */
72 { 0x00, 0x50, 0xf2, 0x04 }, /* AES */
73 };
74 static u8 mwifiex_rsn_oui[CIPHER_SUITE_MAX][4] = {
75 { 0x00, 0x0f, 0xac, 0x02 }, /* TKIP */
76 { 0x00, 0x0f, 0xac, 0x04 }, /* AES */
77 };
78
79 static void
80 _dbg_security_flags(int log_level, const char *func, const char *desc,
81 struct mwifiex_private *priv,
82 struct mwifiex_bssdescriptor *bss_desc)
83 {
84 _mwifiex_dbg(priv->adapter, log_level,
85 "info: %s: %s:\twpa_ie=%#x wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s\tEncMode=%#x privacy=%#x\n",
86 func, desc,
87 bss_desc->bcn_wpa_ie ?
88 bss_desc->bcn_wpa_ie->vend_hdr.element_id : 0,
89 bss_desc->bcn_rsn_ie ?
90 bss_desc->bcn_rsn_ie->ieee_hdr.element_id : 0,
91 priv->sec_info.wep_enabled ? "e" : "d",
92 priv->sec_info.wpa_enabled ? "e" : "d",
93 priv->sec_info.wpa2_enabled ? "e" : "d",
94 priv->sec_info.encryption_mode,
95 bss_desc->privacy);
96 }
97 #define dbg_security_flags(mask, desc, priv, bss_desc) \
98 _dbg_security_flags(MWIFIEX_DBG_##mask, desc, __func__, priv, bss_desc)
99
100 static bool
101 has_ieee_hdr(struct ieee_types_generic *ie, u8 key)
102 {
103 return (ie && ie->ieee_hdr.element_id == key);
104 }
105
106 static bool
107 has_vendor_hdr(struct ieee_types_vendor_specific *ie, u8 key)
108 {
109 return (ie && ie->vend_hdr.element_id == key);
110 }
111
112 /*
113 * This function parses a given IE for a given OUI.
114 *
115 * This is used to parse a WPA/RSN IE to find if it has
116 * a given oui in PTK.
117 */
118 static u8
119 mwifiex_search_oui_in_ie(struct ie_body *iebody, u8 *oui)
120 {
121 u8 count;
122
123 count = iebody->ptk_cnt[0];
124
125 /* There could be multiple OUIs for PTK hence
126 1) Take the length.
127 2) Check all the OUIs for AES.
128 3) If one of them is AES then pass success. */
129 while (count) {
130 if (!memcmp(iebody->ptk_body, oui, sizeof(iebody->ptk_body)))
131 return MWIFIEX_OUI_PRESENT;
132
133 --count;
134 if (count)
135 iebody = (struct ie_body *) ((u8 *) iebody +
136 sizeof(iebody->ptk_body));
137 }
138
139 pr_debug("info: %s: OUI is not found in PTK\n", __func__);
140 return MWIFIEX_OUI_NOT_PRESENT;
141 }
142
143 /*
144 * This function checks if a given OUI is present in a RSN IE.
145 *
146 * The function first checks if a RSN IE is present or not in the
147 * BSS descriptor. It tries to locate the OUI only if such an IE is
148 * present.
149 */
150 static u8
151 mwifiex_is_rsn_oui_present(struct mwifiex_bssdescriptor *bss_desc, u32 cipher)
152 {
153 u8 *oui;
154 struct ie_body *iebody;
155 u8 ret = MWIFIEX_OUI_NOT_PRESENT;
156
157 if (has_ieee_hdr(bss_desc->bcn_rsn_ie, WLAN_EID_RSN)) {
158 iebody = (struct ie_body *)
159 (((u8 *) bss_desc->bcn_rsn_ie->data) +
160 RSN_GTK_OUI_OFFSET);
161 oui = &mwifiex_rsn_oui[cipher][0];
162 ret = mwifiex_search_oui_in_ie(iebody, oui);
163 if (ret)
164 return ret;
165 }
166 return ret;
167 }
168
169 /*
170 * This function checks if a given OUI is present in a WPA IE.
171 *
172 * The function first checks if a WPA IE is present or not in the
173 * BSS descriptor. It tries to locate the OUI only if such an IE is
174 * present.
175 */
176 static u8
177 mwifiex_is_wpa_oui_present(struct mwifiex_bssdescriptor *bss_desc, u32 cipher)
178 {
179 u8 *oui;
180 struct ie_body *iebody;
181 u8 ret = MWIFIEX_OUI_NOT_PRESENT;
182
183 if (has_vendor_hdr(bss_desc->bcn_wpa_ie, WLAN_EID_VENDOR_SPECIFIC)) {
184 iebody = (struct ie_body *) bss_desc->bcn_wpa_ie->data;
185 oui = &mwifiex_wpa_oui[cipher][0];
186 ret = mwifiex_search_oui_in_ie(iebody, oui);
187 if (ret)
188 return ret;
189 }
190 return ret;
191 }
192
193 /*
194 * This function compares two SSIDs and checks if they match.
195 */
196 s32
197 mwifiex_ssid_cmp(struct cfg80211_ssid *ssid1, struct cfg80211_ssid *ssid2)
198 {
199 if (!ssid1 || !ssid2 || (ssid1->ssid_len != ssid2->ssid_len))
200 return -1;
201 return memcmp(ssid1->ssid, ssid2->ssid, ssid1->ssid_len);
202 }
203
204 /*
205 * This function checks if wapi is enabled in driver and scanned network is
206 * compatible with it.
207 */
208 static bool
209 mwifiex_is_bss_wapi(struct mwifiex_private *priv,
210 struct mwifiex_bssdescriptor *bss_desc)
211 {
212 if (priv->sec_info.wapi_enabled &&
213 has_ieee_hdr(bss_desc->bcn_wapi_ie, WLAN_EID_BSS_AC_ACCESS_DELAY))
214 return true;
215 return false;
216 }
217
218 /*
219 * This function checks if driver is configured with no security mode and
220 * scanned network is compatible with it.
221 */
222 static bool
223 mwifiex_is_bss_no_sec(struct mwifiex_private *priv,
224 struct mwifiex_bssdescriptor *bss_desc)
225 {
226 if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
227 !priv->sec_info.wpa2_enabled &&
228 !has_vendor_hdr(bss_desc->bcn_wpa_ie, WLAN_EID_VENDOR_SPECIFIC) &&
229 !has_ieee_hdr(bss_desc->bcn_rsn_ie, WLAN_EID_RSN) &&
230 !priv->sec_info.encryption_mode && !bss_desc->privacy) {
231 return true;
232 }
233 return false;
234 }
235
236 /*
237 * This function checks if static WEP is enabled in driver and scanned network
238 * is compatible with it.
239 */
240 static bool
241 mwifiex_is_bss_static_wep(struct mwifiex_private *priv,
242 struct mwifiex_bssdescriptor *bss_desc)
243 {
244 if (priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
245 !priv->sec_info.wpa2_enabled && bss_desc->privacy) {
246 return true;
247 }
248 return false;
249 }
250
251 /*
252 * This function checks if wpa is enabled in driver and scanned network is
253 * compatible with it.
254 */
255 static bool
256 mwifiex_is_bss_wpa(struct mwifiex_private *priv,
257 struct mwifiex_bssdescriptor *bss_desc)
258 {
259 if (!priv->sec_info.wep_enabled && priv->sec_info.wpa_enabled &&
260 !priv->sec_info.wpa2_enabled &&
261 has_vendor_hdr(bss_desc->bcn_wpa_ie, WLAN_EID_VENDOR_SPECIFIC)
262 /*
263 * Privacy bit may NOT be set in some APs like
264 * LinkSys WRT54G && bss_desc->privacy
265 */
266 ) {
267 dbg_security_flags(INFO, "WPA", priv, bss_desc);
268 return true;
269 }
270 return false;
271 }
272
273 /*
274 * This function checks if wpa2 is enabled in driver and scanned network is
275 * compatible with it.
276 */
277 static bool
278 mwifiex_is_bss_wpa2(struct mwifiex_private *priv,
279 struct mwifiex_bssdescriptor *bss_desc)
280 {
281 if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
282 priv->sec_info.wpa2_enabled &&
283 has_ieee_hdr(bss_desc->bcn_rsn_ie, WLAN_EID_RSN)) {
284 /*
285 * Privacy bit may NOT be set in some APs like
286 * LinkSys WRT54G && bss_desc->privacy
287 */
288 dbg_security_flags(INFO, "WAP2", priv, bss_desc);
289 return true;
290 }
291 return false;
292 }
293
294 /*
295 * This function checks if adhoc AES is enabled in driver and scanned network is
296 * compatible with it.
297 */
298 static bool
299 mwifiex_is_bss_adhoc_aes(struct mwifiex_private *priv,
300 struct mwifiex_bssdescriptor *bss_desc)
301 {
302 if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
303 !priv->sec_info.wpa2_enabled &&
304 !has_vendor_hdr(bss_desc->bcn_wpa_ie, WLAN_EID_VENDOR_SPECIFIC) &&
305 !has_ieee_hdr(bss_desc->bcn_rsn_ie, WLAN_EID_RSN) &&
306 !priv->sec_info.encryption_mode && bss_desc->privacy) {
307 return true;
308 }
309 return false;
310 }
311
312 /*
313 * This function checks if dynamic WEP is enabled in driver and scanned network
314 * is compatible with it.
315 */
316 static bool
317 mwifiex_is_bss_dynamic_wep(struct mwifiex_private *priv,
318 struct mwifiex_bssdescriptor *bss_desc)
319 {
320 if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
321 !priv->sec_info.wpa2_enabled &&
322 !has_vendor_hdr(bss_desc->bcn_wpa_ie, WLAN_EID_VENDOR_SPECIFIC) &&
323 !has_ieee_hdr(bss_desc->bcn_rsn_ie, WLAN_EID_RSN) &&
324 priv->sec_info.encryption_mode && bss_desc->privacy) {
325 dbg_security_flags(INFO, "dynamic", priv, bss_desc);
326 return true;
327 }
328 return false;
329 }
330
331 /*
332 * This function checks if a scanned network is compatible with the driver
333 * settings.
334 *
335 * WEP WPA WPA2 ad-hoc encrypt Network
336 * enabled enabled enabled AES mode Privacy WPA WPA2 Compatible
337 * 0 0 0 0 NONE 0 0 0 yes No security
338 * 0 1 0 0 x 1x 1 x yes WPA (disable
339 * HT if no AES)
340 * 0 0 1 0 x 1x x 1 yes WPA2 (disable
341 * HT if no AES)
342 * 0 0 0 1 NONE 1 0 0 yes Ad-hoc AES
343 * 1 0 0 0 NONE 1 0 0 yes Static WEP
344 * (disable HT)
345 * 0 0 0 0 !=NONE 1 0 0 yes Dynamic WEP
346 *
347 * Compatibility is not matched while roaming, except for mode.
348 */
349 static s32
350 mwifiex_is_network_compatible(struct mwifiex_private *priv,
351 struct mwifiex_bssdescriptor *bss_desc, u32 mode)
352 {
353 struct mwifiex_adapter *adapter = priv->adapter;
354
355 bss_desc->disable_11n = false;
356
357 /* Don't check for compatibility if roaming */
358 if (priv->media_connected &&
359 (priv->bss_mode == NL80211_IFTYPE_STATION) &&
360 (bss_desc->bss_mode == NL80211_IFTYPE_STATION))
361 return 0;
362
363 if (priv->wps.session_enable) {
364 mwifiex_dbg(adapter, IOCTL,
365 "info: return success directly in WPS period\n");
366 return 0;
367 }
368
369 if (bss_desc->chan_sw_ie_present) {
370 mwifiex_dbg(adapter, INFO,
371 "Don't connect to AP with WLAN_EID_CHANNEL_SWITCH\n");
372 return -1;
373 }
374
375 if (mwifiex_is_bss_wapi(priv, bss_desc)) {
376 mwifiex_dbg(adapter, INFO,
377 "info: return success for WAPI AP\n");
378 return 0;
379 }
380
381 if (bss_desc->bss_mode == mode) {
382 if (mwifiex_is_bss_no_sec(priv, bss_desc)) {
383 /* No security */
384 return 0;
385 } else if (mwifiex_is_bss_static_wep(priv, bss_desc)) {
386 /* Static WEP enabled */
387 mwifiex_dbg(adapter, INFO,
388 "info: Disable 11n in WEP mode.\n");
389 bss_desc->disable_11n = true;
390 return 0;
391 } else if (mwifiex_is_bss_wpa(priv, bss_desc)) {
392 /* WPA enabled */
393 if (((priv->adapter->config_bands & BAND_GN ||
394 priv->adapter->config_bands & BAND_AN) &&
395 bss_desc->bcn_ht_cap) &&
396 !mwifiex_is_wpa_oui_present(bss_desc,
397 CIPHER_SUITE_CCMP)) {
398
399 if (mwifiex_is_wpa_oui_present
400 (bss_desc, CIPHER_SUITE_TKIP)) {
401 mwifiex_dbg(adapter, INFO,
402 "info: Disable 11n if AES\t"
403 "is not supported by AP\n");
404 bss_desc->disable_11n = true;
405 } else {
406 return -1;
407 }
408 }
409 return 0;
410 } else if (mwifiex_is_bss_wpa2(priv, bss_desc)) {
411 /* WPA2 enabled */
412 if (((priv->adapter->config_bands & BAND_GN ||
413 priv->adapter->config_bands & BAND_AN) &&
414 bss_desc->bcn_ht_cap) &&
415 !mwifiex_is_rsn_oui_present(bss_desc,
416 CIPHER_SUITE_CCMP)) {
417
418 if (mwifiex_is_rsn_oui_present
419 (bss_desc, CIPHER_SUITE_TKIP)) {
420 mwifiex_dbg(adapter, INFO,
421 "info: Disable 11n if AES\t"
422 "is not supported by AP\n");
423 bss_desc->disable_11n = true;
424 } else {
425 return -1;
426 }
427 }
428 return 0;
429 } else if (mwifiex_is_bss_adhoc_aes(priv, bss_desc)) {
430 /* Ad-hoc AES enabled */
431 return 0;
432 } else if (mwifiex_is_bss_dynamic_wep(priv, bss_desc)) {
433 /* Dynamic WEP enabled */
434 return 0;
435 }
436
437 /* Security doesn't match */
438 dbg_security_flags(ERROR, "failed", priv, bss_desc);
439 return -1;
440 }
441
442 /* Mode doesn't match */
443 return -1;
444 }
445
446 /*
447 * This function creates a channel list for the driver to scan, based
448 * on region/band information.
449 *
450 * This routine is used for any scan that is not provided with a
451 * specific channel list to scan.
452 */
453 static int
454 mwifiex_scan_create_channel_list(struct mwifiex_private *priv,
455 const struct mwifiex_user_scan_cfg
456 *user_scan_in,
457 struct mwifiex_chan_scan_param_set
458 *scan_chan_list,
459 u8 filtered_scan)
460 {
461 enum nl80211_band band;
462 struct ieee80211_supported_band *sband;
463 struct ieee80211_channel *ch;
464 struct mwifiex_adapter *adapter = priv->adapter;
465 int chan_idx = 0, i;
466
467 for (band = 0; (band < NUM_NL80211_BANDS) ; band++) {
468
469 if (!priv->wdev.wiphy->bands[band])
470 continue;
471
472 sband = priv->wdev.wiphy->bands[band];
473
474 for (i = 0; (i < sband->n_channels) ; i++) {
475 ch = &sband->channels[i];
476 if (ch->flags & IEEE80211_CHAN_DISABLED)
477 continue;
478 scan_chan_list[chan_idx].radio_type = band;
479
480 if (user_scan_in &&
481 user_scan_in->chan_list[0].scan_time)
482 scan_chan_list[chan_idx].max_scan_time =
483 cpu_to_le16((u16) user_scan_in->
484 chan_list[0].scan_time);
485 else if (ch->flags & IEEE80211_CHAN_NO_IR)
486 scan_chan_list[chan_idx].max_scan_time =
487 cpu_to_le16(adapter->passive_scan_time);
488 else
489 scan_chan_list[chan_idx].max_scan_time =
490 cpu_to_le16(adapter->active_scan_time);
491
492 if (ch->flags & IEEE80211_CHAN_NO_IR)
493 scan_chan_list[chan_idx].chan_scan_mode_bitmap
494 |= (MWIFIEX_PASSIVE_SCAN |
495 MWIFIEX_HIDDEN_SSID_REPORT);
496 else
497 scan_chan_list[chan_idx].chan_scan_mode_bitmap
498 &= ~MWIFIEX_PASSIVE_SCAN;
499 scan_chan_list[chan_idx].chan_number =
500 (u32) ch->hw_value;
501
502 scan_chan_list[chan_idx].chan_scan_mode_bitmap
503 |= MWIFIEX_DISABLE_CHAN_FILT;
504
505 if (filtered_scan) {
506 scan_chan_list[chan_idx].max_scan_time =
507 cpu_to_le16(adapter->specific_scan_time);
508 }
509 chan_idx++;
510 }
511
512 }
513 return chan_idx;
514 }
515
516 /* This function creates a channel list tlv for bgscan config, based
517 * on region/band information.
518 */
519 static int
520 mwifiex_bgscan_create_channel_list(struct mwifiex_private *priv,
521 const struct mwifiex_bg_scan_cfg
522 *bgscan_cfg_in,
523 struct mwifiex_chan_scan_param_set
524 *scan_chan_list)
525 {
526 enum nl80211_band band;
527 struct ieee80211_supported_band *sband;
528 struct ieee80211_channel *ch;
529 struct mwifiex_adapter *adapter = priv->adapter;
530 int chan_idx = 0, i;
531
532 for (band = 0; (band < NUM_NL80211_BANDS); band++) {
533 if (!priv->wdev.wiphy->bands[band])
534 continue;
535
536 sband = priv->wdev.wiphy->bands[band];
537
538 for (i = 0; (i < sband->n_channels) ; i++) {
539 ch = &sband->channels[i];
540 if (ch->flags & IEEE80211_CHAN_DISABLED)
541 continue;
542 scan_chan_list[chan_idx].radio_type = band;
543
544 if (bgscan_cfg_in->chan_list[0].scan_time)
545 scan_chan_list[chan_idx].max_scan_time =
546 cpu_to_le16((u16)bgscan_cfg_in->
547 chan_list[0].scan_time);
548 else if (ch->flags & IEEE80211_CHAN_NO_IR)
549 scan_chan_list[chan_idx].max_scan_time =
550 cpu_to_le16(adapter->passive_scan_time);
551 else
552 scan_chan_list[chan_idx].max_scan_time =
553 cpu_to_le16(adapter->
554 specific_scan_time);
555
556 if (ch->flags & IEEE80211_CHAN_NO_IR)
557 scan_chan_list[chan_idx].chan_scan_mode_bitmap
558 |= MWIFIEX_PASSIVE_SCAN;
559 else
560 scan_chan_list[chan_idx].chan_scan_mode_bitmap
561 &= ~MWIFIEX_PASSIVE_SCAN;
562
563 scan_chan_list[chan_idx].chan_number =
564 (u32)ch->hw_value;
565 chan_idx++;
566 }
567 }
568 return chan_idx;
569 }
570
571 /* This function appends rate TLV to scan config command. */
572 static int
573 mwifiex_append_rate_tlv(struct mwifiex_private *priv,
574 struct mwifiex_scan_cmd_config *scan_cfg_out,
575 u8 radio)
576 {
577 struct mwifiex_ie_types_rates_param_set *rates_tlv;
578 u8 rates[MWIFIEX_SUPPORTED_RATES], *tlv_pos;
579 u32 rates_size;
580
581 memset(rates, 0, sizeof(rates));
582
583 tlv_pos = (u8 *)scan_cfg_out->tlv_buf + scan_cfg_out->tlv_buf_len;
584
585 if (priv->scan_request)
586 rates_size = mwifiex_get_rates_from_cfg80211(priv, rates,
587 radio);
588 else
589 rates_size = mwifiex_get_supported_rates(priv, rates);
590
591 mwifiex_dbg(priv->adapter, CMD,
592 "info: SCAN_CMD: Rates size = %d\n",
593 rates_size);
594 rates_tlv = (struct mwifiex_ie_types_rates_param_set *)tlv_pos;
595 rates_tlv->header.type = cpu_to_le16(WLAN_EID_SUPP_RATES);
596 rates_tlv->header.len = cpu_to_le16((u16) rates_size);
597 memcpy(rates_tlv->rates, rates, rates_size);
598 scan_cfg_out->tlv_buf_len += sizeof(rates_tlv->header) + rates_size;
599
600 return rates_size;
601 }
602
603 /*
604 * This function constructs and sends multiple scan config commands to
605 * the firmware.
606 *
607 * Previous routines in the code flow have created a scan command configuration
608 * with any requested TLVs. This function splits the channel TLV into maximum
609 * channels supported per scan lists and sends the portion of the channel TLV,
610 * along with the other TLVs, to the firmware.
611 */
612 static int
613 mwifiex_scan_channel_list(struct mwifiex_private *priv,
614 u32 max_chan_per_scan, u8 filtered_scan,
615 struct mwifiex_scan_cmd_config *scan_cfg_out,
616 struct mwifiex_ie_types_chan_list_param_set
617 *chan_tlv_out,
618 struct mwifiex_chan_scan_param_set *scan_chan_list)
619 {
620 struct mwifiex_adapter *adapter = priv->adapter;
621 int ret = 0;
622 struct mwifiex_chan_scan_param_set *tmp_chan_list;
623 struct mwifiex_chan_scan_param_set *start_chan;
624 u32 tlv_idx, rates_size, cmd_no;
625 u32 total_scan_time;
626 u32 done_early;
627 u8 radio_type;
628
629 if (!scan_cfg_out || !chan_tlv_out || !scan_chan_list) {
630 mwifiex_dbg(priv->adapter, ERROR,
631 "info: Scan: Null detect: %p, %p, %p\n",
632 scan_cfg_out, chan_tlv_out, scan_chan_list);
633 return -1;
634 }
635
636 /* Check csa channel expiry before preparing scan list */
637 mwifiex_11h_get_csa_closed_channel(priv);
638
639 chan_tlv_out->header.type = cpu_to_le16(TLV_TYPE_CHANLIST);
640
641 /* Set the temp channel struct pointer to the start of the desired
642 list */
643 tmp_chan_list = scan_chan_list;
644
645 /* Loop through the desired channel list, sending a new firmware scan
646 commands for each max_chan_per_scan channels (or for 1,6,11
647 individually if configured accordingly) */
648 while (tmp_chan_list->chan_number) {
649
650 tlv_idx = 0;
651 total_scan_time = 0;
652 radio_type = 0;
653 chan_tlv_out->header.len = 0;
654 start_chan = tmp_chan_list;
655 done_early = false;
656
657 /*
658 * Construct the Channel TLV for the scan command. Continue to
659 * insert channel TLVs until:
660 * - the tlv_idx hits the maximum configured per scan command
661 * - the next channel to insert is 0 (end of desired channel
662 * list)
663 * - done_early is set (controlling individual scanning of
664 * 1,6,11)
665 */
666 while (tlv_idx < max_chan_per_scan &&
667 tmp_chan_list->chan_number && !done_early) {
668
669 if (tmp_chan_list->chan_number == priv->csa_chan) {
670 tmp_chan_list++;
671 continue;
672 }
673
674 radio_type = tmp_chan_list->radio_type;
675 mwifiex_dbg(priv->adapter, INFO,
676 "info: Scan: Chan(%3d), Radio(%d),\t"
677 "Mode(%d, %d), Dur(%d)\n",
678 tmp_chan_list->chan_number,
679 tmp_chan_list->radio_type,
680 tmp_chan_list->chan_scan_mode_bitmap
681 & MWIFIEX_PASSIVE_SCAN,
682 (tmp_chan_list->chan_scan_mode_bitmap
683 & MWIFIEX_DISABLE_CHAN_FILT) >> 1,
684 le16_to_cpu(tmp_chan_list->max_scan_time));
685
686 /* Copy the current channel TLV to the command being
687 prepared */
688 memcpy(chan_tlv_out->chan_scan_param + tlv_idx,
689 tmp_chan_list,
690 sizeof(chan_tlv_out->chan_scan_param));
691
692 /* Increment the TLV header length by the size
693 appended */
694 le16_add_cpu(&chan_tlv_out->header.len,
695 sizeof(chan_tlv_out->chan_scan_param));
696
697 /*
698 * The tlv buffer length is set to the number of bytes
699 * of the between the channel tlv pointer and the start
700 * of the tlv buffer. This compensates for any TLVs
701 * that were appended before the channel list.
702 */
703 scan_cfg_out->tlv_buf_len = (u32) ((u8 *) chan_tlv_out -
704 scan_cfg_out->tlv_buf);
705
706 /* Add the size of the channel tlv header and the data
707 length */
708 scan_cfg_out->tlv_buf_len +=
709 (sizeof(chan_tlv_out->header)
710 + le16_to_cpu(chan_tlv_out->header.len));
711
712 /* Increment the index to the channel tlv we are
713 constructing */
714 tlv_idx++;
715
716 /* Count the total scan time per command */
717 total_scan_time +=
718 le16_to_cpu(tmp_chan_list->max_scan_time);
719
720 done_early = false;
721
722 /* Stop the loop if the *current* channel is in the
723 1,6,11 set and we are not filtering on a BSSID
724 or SSID. */
725 if (!filtered_scan &&
726 (tmp_chan_list->chan_number == 1 ||
727 tmp_chan_list->chan_number == 6 ||
728 tmp_chan_list->chan_number == 11))
729 done_early = true;
730
731 /* Increment the tmp pointer to the next channel to
732 be scanned */
733 tmp_chan_list++;
734
735 /* Stop the loop if the *next* channel is in the 1,6,11
736 set. This will cause it to be the only channel
737 scanned on the next interation */
738 if (!filtered_scan &&
739 (tmp_chan_list->chan_number == 1 ||
740 tmp_chan_list->chan_number == 6 ||
741 tmp_chan_list->chan_number == 11))
742 done_early = true;
743 }
744
745 /* The total scan time should be less than scan command timeout
746 value */
747 if (total_scan_time > MWIFIEX_MAX_TOTAL_SCAN_TIME) {
748 mwifiex_dbg(priv->adapter, ERROR,
749 "total scan time %dms\t"
750 "is over limit (%dms), scan skipped\n",
751 total_scan_time,
752 MWIFIEX_MAX_TOTAL_SCAN_TIME);
753 ret = -1;
754 break;
755 }
756
757 rates_size = mwifiex_append_rate_tlv(priv, scan_cfg_out,
758 radio_type);
759
760 priv->adapter->scan_channels = start_chan;
761
762 /* Send the scan command to the firmware with the specified
763 cfg */
764 if (priv->adapter->ext_scan)
765 cmd_no = HostCmd_CMD_802_11_SCAN_EXT;
766 else
767 cmd_no = HostCmd_CMD_802_11_SCAN;
768
769 ret = mwifiex_send_cmd(priv, cmd_no, HostCmd_ACT_GEN_SET,
770 0, scan_cfg_out, false);
771
772 /* rate IE is updated per scan command but same starting
773 * pointer is used each time so that rate IE from earlier
774 * scan_cfg_out->buf is overwritten with new one.
775 */
776 scan_cfg_out->tlv_buf_len -=
777 sizeof(struct mwifiex_ie_types_header) + rates_size;
778
779 if (ret) {
780 mwifiex_cancel_pending_scan_cmd(adapter);
781 break;
782 }
783 }
784
785 if (ret)
786 return -1;
787
788 return 0;
789 }
790
791 /*
792 * This function constructs a scan command configuration structure to use
793 * in scan commands.
794 *
795 * Application layer or other functions can invoke network scanning
796 * with a scan configuration supplied in a user scan configuration structure.
797 * This structure is used as the basis of one or many scan command configuration
798 * commands that are sent to the command processing module and eventually to the
799 * firmware.
800 *
801 * This function creates a scan command configuration structure based on the
802 * following user supplied parameters (if present):
803 * - SSID filter
804 * - BSSID filter
805 * - Number of Probes to be sent
806 * - Channel list
807 *
808 * If the SSID or BSSID filter is not present, the filter is disabled/cleared.
809 * If the number of probes is not set, adapter default setting is used.
810 */
811 static void
812 mwifiex_config_scan(struct mwifiex_private *priv,
813 const struct mwifiex_user_scan_cfg *user_scan_in,
814 struct mwifiex_scan_cmd_config *scan_cfg_out,
815 struct mwifiex_ie_types_chan_list_param_set **chan_list_out,
816 struct mwifiex_chan_scan_param_set *scan_chan_list,
817 u8 *max_chan_per_scan, u8 *filtered_scan,
818 u8 *scan_current_only)
819 {
820 struct mwifiex_adapter *adapter = priv->adapter;
821 struct mwifiex_ie_types_num_probes *num_probes_tlv;
822 struct mwifiex_ie_types_scan_chan_gap *chan_gap_tlv;
823 struct mwifiex_ie_types_random_mac *random_mac_tlv;
824 struct mwifiex_ie_types_wildcard_ssid_params *wildcard_ssid_tlv;
825 struct mwifiex_ie_types_bssid_list *bssid_tlv;
826 u8 *tlv_pos;
827 u32 num_probes;
828 u32 ssid_len;
829 u32 chan_idx;
830 u32 chan_num;
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
864 /* Default the ssid_filter flag to TRUE, set false under
865 certain wildcard conditions and qualified by the existence
866 of an SSID list before marking the scan as filtered */
867 ssid_filter = true;
868
869 /* Set the BSS type scan filter, use Adapter setting if
870 unset */
871 scan_cfg_out->bss_mode =
872 (u8)(user_scan_in->bss_mode ?: adapter->scan_mode);
873
874 /* Set the number of probes to send, use Adapter setting
875 if unset */
876 num_probes = user_scan_in->num_probes ?: adapter->scan_probes;
877
878 /*
879 * Set the BSSID filter to the incoming configuration,
880 * if non-zero. If not set, it will remain disabled
881 * (all zeros).
882 */
883 memcpy(scan_cfg_out->specific_bssid,
884 user_scan_in->specific_bssid,
885 sizeof(scan_cfg_out->specific_bssid));
886
887 if (adapter->ext_scan &&
888 !is_zero_ether_addr(scan_cfg_out->specific_bssid)) {
889 bssid_tlv =
890 (struct mwifiex_ie_types_bssid_list *)tlv_pos;
891 bssid_tlv->header.type = cpu_to_le16(TLV_TYPE_BSSID);
892 bssid_tlv->header.len = cpu_to_le16(ETH_ALEN);
893 memcpy(bssid_tlv->bssid, user_scan_in->specific_bssid,
894 ETH_ALEN);
895 tlv_pos += sizeof(struct mwifiex_ie_types_bssid_list);
896 }
897
898 for (i = 0; i < user_scan_in->num_ssids; i++) {
899 ssid_len = user_scan_in->ssid_list[i].ssid_len;
900
901 wildcard_ssid_tlv =
902 (struct mwifiex_ie_types_wildcard_ssid_params *)
903 tlv_pos;
904 wildcard_ssid_tlv->header.type =
905 cpu_to_le16(TLV_TYPE_WILDCARDSSID);
906 wildcard_ssid_tlv->header.len = cpu_to_le16(
907 (u16) (ssid_len + sizeof(wildcard_ssid_tlv->
908 max_ssid_length)));
909
910 /*
911 * max_ssid_length = 0 tells firmware to perform
912 * specific scan for the SSID filled, whereas
913 * max_ssid_length = IEEE80211_MAX_SSID_LEN is for
914 * wildcard scan.
915 */
916 if (ssid_len)
917 wildcard_ssid_tlv->max_ssid_length = 0;
918 else
919 wildcard_ssid_tlv->max_ssid_length =
920 IEEE80211_MAX_SSID_LEN;
921
922 if (!memcmp(user_scan_in->ssid_list[i].ssid,
923 "DIRECT-", 7))
924 wildcard_ssid_tlv->max_ssid_length = 0xfe;
925
926 memcpy(wildcard_ssid_tlv->ssid,
927 user_scan_in->ssid_list[i].ssid, ssid_len);
928
929 tlv_pos += (sizeof(wildcard_ssid_tlv->header)
930 + le16_to_cpu(wildcard_ssid_tlv->header.len));
931
932 mwifiex_dbg(adapter, INFO,
933 "info: scan: ssid[%d]: %s, %d\n",
934 i, wildcard_ssid_tlv->ssid,
935 wildcard_ssid_tlv->max_ssid_length);
936
937 /* Empty wildcard ssid with a maxlen will match many or
938 potentially all SSIDs (maxlen == 32), therefore do
939 not treat the scan as
940 filtered. */
941 if (!ssid_len && wildcard_ssid_tlv->max_ssid_length)
942 ssid_filter = false;
943 }
944
945 /*
946 * The default number of channels sent in the command is low to
947 * ensure the response buffer from the firmware does not
948 * truncate scan results. That is not an issue with an SSID
949 * or BSSID filter applied to the scan results in the firmware.
950 */
951 if ((i && ssid_filter) ||
952 !is_zero_ether_addr(scan_cfg_out->specific_bssid))
953 *filtered_scan = true;
954
955 if (user_scan_in->scan_chan_gap) {
956 mwifiex_dbg(adapter, INFO,
957 "info: scan: channel gap = %d\n",
958 user_scan_in->scan_chan_gap);
959 *max_chan_per_scan =
960 MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN;
961
962 chan_gap_tlv = (void *)tlv_pos;
963 chan_gap_tlv->header.type =
964 cpu_to_le16(TLV_TYPE_SCAN_CHANNEL_GAP);
965 chan_gap_tlv->header.len =
966 cpu_to_le16(sizeof(chan_gap_tlv->chan_gap));
967 chan_gap_tlv->chan_gap =
968 cpu_to_le16((user_scan_in->scan_chan_gap));
969 tlv_pos +=
970 sizeof(struct mwifiex_ie_types_scan_chan_gap);
971 }
972
973 if (!ether_addr_equal(user_scan_in->random_mac, zero_mac)) {
974 random_mac_tlv = (void *)tlv_pos;
975 random_mac_tlv->header.type =
976 cpu_to_le16(TLV_TYPE_RANDOM_MAC);
977 random_mac_tlv->header.len =
978 cpu_to_le16(sizeof(random_mac_tlv->mac));
979 ether_addr_copy(random_mac_tlv->mac,
980 user_scan_in->random_mac);
981 tlv_pos +=
982 sizeof(struct mwifiex_ie_types_random_mac);
983 }
984 } else {
985 scan_cfg_out->bss_mode = (u8) adapter->scan_mode;
986 num_probes = adapter->scan_probes;
987 }
988
989 /*
990 * If a specific BSSID or SSID is used, the number of channels in the
991 * scan command will be increased to the absolute maximum.
992 */
993 if (*filtered_scan)
994 *max_chan_per_scan = MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN;
995 else
996 *max_chan_per_scan = MWIFIEX_DEF_CHANNELS_PER_SCAN_CMD;
997
998 if (adapter->ext_scan) {
999 bss_mode = (struct mwifiex_ie_types_bss_mode *)tlv_pos;
1000 bss_mode->header.type = cpu_to_le16(TLV_TYPE_BSS_MODE);
1001 bss_mode->header.len = cpu_to_le16(sizeof(bss_mode->bss_mode));
1002 bss_mode->bss_mode = scan_cfg_out->bss_mode;
1003 tlv_pos += sizeof(bss_mode->header) +
1004 le16_to_cpu(bss_mode->header.len);
1005 }
1006
1007 /* If the input config or adapter has the number of Probes set,
1008 add tlv */
1009 if (num_probes) {
1010
1011 mwifiex_dbg(adapter, INFO,
1012 "info: scan: num_probes = %d\n",
1013 num_probes);
1014
1015 num_probes_tlv = (struct mwifiex_ie_types_num_probes *) tlv_pos;
1016 num_probes_tlv->header.type = cpu_to_le16(TLV_TYPE_NUMPROBES);
1017 num_probes_tlv->header.len =
1018 cpu_to_le16(sizeof(num_probes_tlv->num_probes));
1019 num_probes_tlv->num_probes = cpu_to_le16((u16) num_probes);
1020
1021 tlv_pos += sizeof(num_probes_tlv->header) +
1022 le16_to_cpu(num_probes_tlv->header.len);
1023
1024 }
1025
1026 if (ISSUPP_11NENABLED(priv->adapter->fw_cap_info) &&
1027 (priv->adapter->config_bands & BAND_GN ||
1028 priv->adapter->config_bands & BAND_AN)) {
1029 ht_cap = (struct mwifiex_ie_types_htcap *) tlv_pos;
1030 memset(ht_cap, 0, sizeof(struct mwifiex_ie_types_htcap));
1031 ht_cap->header.type = cpu_to_le16(WLAN_EID_HT_CAPABILITY);
1032 ht_cap->header.len =
1033 cpu_to_le16(sizeof(struct ieee80211_ht_cap));
1034 radio_type =
1035 mwifiex_band_to_radio_type(priv->adapter->config_bands);
1036 mwifiex_fill_cap_info(priv, radio_type, &ht_cap->ht_cap);
1037 tlv_pos += sizeof(struct mwifiex_ie_types_htcap);
1038 }
1039
1040 /* Append vendor specific IE TLV */
1041 mwifiex_cmd_append_vsie_tlv(priv, MWIFIEX_VSIE_MASK_SCAN, &tlv_pos);
1042
1043 /*
1044 * Set the output for the channel TLV to the address in the tlv buffer
1045 * past any TLVs that were added in this function (SSID, num_probes).
1046 * Channel TLVs will be added past this for each scan command,
1047 * preserving the TLVs that were previously added.
1048 */
1049 *chan_list_out =
1050 (struct mwifiex_ie_types_chan_list_param_set *) tlv_pos;
1051
1052 if (user_scan_in && user_scan_in->chan_list[0].chan_number) {
1053
1054 mwifiex_dbg(adapter, INFO,
1055 "info: Scan: Using supplied channel list\n");
1056
1057 for (chan_idx = 0;
1058 chan_idx < MWIFIEX_USER_SCAN_CHAN_MAX &&
1059 user_scan_in->chan_list[chan_idx].chan_number;
1060 chan_idx++) {
1061
1062 channel = user_scan_in->chan_list[chan_idx].chan_number;
1063 scan_chan_list[chan_idx].chan_number = channel;
1064
1065 radio_type =
1066 user_scan_in->chan_list[chan_idx].radio_type;
1067 scan_chan_list[chan_idx].radio_type = radio_type;
1068
1069 scan_type = user_scan_in->chan_list[chan_idx].scan_type;
1070
1071 if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE)
1072 scan_chan_list[chan_idx].chan_scan_mode_bitmap
1073 |= (MWIFIEX_PASSIVE_SCAN |
1074 MWIFIEX_HIDDEN_SSID_REPORT);
1075 else
1076 scan_chan_list[chan_idx].chan_scan_mode_bitmap
1077 &= ~MWIFIEX_PASSIVE_SCAN;
1078
1079 scan_chan_list[chan_idx].chan_scan_mode_bitmap
1080 |= MWIFIEX_DISABLE_CHAN_FILT;
1081
1082 if (user_scan_in->chan_list[chan_idx].scan_time) {
1083 scan_dur = (u16) user_scan_in->
1084 chan_list[chan_idx].scan_time;
1085 } else {
1086 if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE)
1087 scan_dur = adapter->passive_scan_time;
1088 else if (*filtered_scan)
1089 scan_dur = adapter->specific_scan_time;
1090 else
1091 scan_dur = adapter->active_scan_time;
1092 }
1093
1094 scan_chan_list[chan_idx].min_scan_time =
1095 cpu_to_le16(scan_dur);
1096 scan_chan_list[chan_idx].max_scan_time =
1097 cpu_to_le16(scan_dur);
1098 }
1099
1100 /* Check if we are only scanning the current channel */
1101 if ((chan_idx == 1) &&
1102 (user_scan_in->chan_list[0].chan_number ==
1103 priv->curr_bss_params.bss_descriptor.channel)) {
1104 *scan_current_only = true;
1105 mwifiex_dbg(adapter, INFO,
1106 "info: Scan: Scanning current channel only\n");
1107 }
1108 chan_num = chan_idx;
1109 } else {
1110 mwifiex_dbg(adapter, INFO,
1111 "info: Scan: Creating full region channel list\n");
1112 chan_num = mwifiex_scan_create_channel_list(priv, user_scan_in,
1113 scan_chan_list,
1114 *filtered_scan);
1115 }
1116
1117 }
1118
1119 /*
1120 * This function inspects the scan response buffer for pointers to
1121 * expected TLVs.
1122 *
1123 * TLVs can be included at the end of the scan response BSS information.
1124 *
1125 * Data in the buffer is parsed pointers to TLVs that can potentially
1126 * be passed back in the response.
1127 */
1128 static void
1129 mwifiex_ret_802_11_scan_get_tlv_ptrs(struct mwifiex_adapter *adapter,
1130 struct mwifiex_ie_types_data *tlv,
1131 u32 tlv_buf_size, u32 req_tlv_type,
1132 struct mwifiex_ie_types_data **tlv_data)
1133 {
1134 struct mwifiex_ie_types_data *current_tlv;
1135 u32 tlv_buf_left;
1136 u32 tlv_type;
1137 u32 tlv_len;
1138
1139 current_tlv = tlv;
1140 tlv_buf_left = tlv_buf_size;
1141 *tlv_data = NULL;
1142
1143 mwifiex_dbg(adapter, INFO,
1144 "info: SCAN_RESP: tlv_buf_size = %d\n",
1145 tlv_buf_size);
1146
1147 while (tlv_buf_left >= sizeof(struct mwifiex_ie_types_header)) {
1148
1149 tlv_type = le16_to_cpu(current_tlv->header.type);
1150 tlv_len = le16_to_cpu(current_tlv->header.len);
1151
1152 if (sizeof(tlv->header) + tlv_len > tlv_buf_left) {
1153 mwifiex_dbg(adapter, ERROR,
1154 "SCAN_RESP: TLV buffer corrupt\n");
1155 break;
1156 }
1157
1158 if (req_tlv_type == tlv_type) {
1159 switch (tlv_type) {
1160 case TLV_TYPE_TSFTIMESTAMP:
1161 mwifiex_dbg(adapter, INFO,
1162 "info: SCAN_RESP: TSF\t"
1163 "timestamp TLV, len = %d\n",
1164 tlv_len);
1165 *tlv_data = current_tlv;
1166 break;
1167 case TLV_TYPE_CHANNELBANDLIST:
1168 mwifiex_dbg(adapter, INFO,
1169 "info: SCAN_RESP: channel\t"
1170 "band list TLV, len = %d\n",
1171 tlv_len);
1172 *tlv_data = current_tlv;
1173 break;
1174 default:
1175 mwifiex_dbg(adapter, ERROR,
1176 "SCAN_RESP: unhandled TLV = %d\n",
1177 tlv_type);
1178 /* Give up, this seems corrupted */
1179 return;
1180 }
1181 }
1182
1183 if (*tlv_data)
1184 break;
1185
1186
1187 tlv_buf_left -= (sizeof(tlv->header) + tlv_len);
1188 current_tlv =
1189 (struct mwifiex_ie_types_data *) (current_tlv->data +
1190 tlv_len);
1191
1192 } /* while */
1193 }
1194
1195 /*
1196 * This function parses provided beacon buffer and updates
1197 * respective fields in bss descriptor structure.
1198 */
1199 int mwifiex_update_bss_desc_with_ie(struct mwifiex_adapter *adapter,
1200 struct mwifiex_bssdescriptor *bss_entry)
1201 {
1202 int ret = 0;
1203 u8 element_id;
1204 struct ieee_types_fh_param_set *fh_param_set;
1205 struct ieee_types_ds_param_set *ds_param_set;
1206 struct ieee_types_cf_param_set *cf_param_set;
1207 struct ieee_types_ibss_param_set *ibss_param_set;
1208 u8 *current_ptr;
1209 u8 *rate;
1210 u8 element_len;
1211 u16 total_ie_len;
1212 u8 bytes_to_copy;
1213 u8 rate_size;
1214 u8 found_data_rate_ie;
1215 u32 bytes_left;
1216 struct ieee_types_vendor_specific *vendor_ie;
1217 const u8 wpa_oui[4] = { 0x00, 0x50, 0xf2, 0x01 };
1218 const u8 wmm_oui[4] = { 0x00, 0x50, 0xf2, 0x02 };
1219
1220 found_data_rate_ie = false;
1221 rate_size = 0;
1222 current_ptr = bss_entry->beacon_buf;
1223 bytes_left = bss_entry->beacon_buf_size;
1224
1225 /* Process variable IE */
1226 while (bytes_left >= 2) {
1227 element_id = *current_ptr;
1228 element_len = *(current_ptr + 1);
1229 total_ie_len = element_len + sizeof(struct ieee_types_header);
1230
1231 if (bytes_left < total_ie_len) {
1232 mwifiex_dbg(adapter, ERROR,
1233 "err: InterpretIE: in processing\t"
1234 "IE, bytes left < IE length\n");
1235 return -1;
1236 }
1237 switch (element_id) {
1238 case WLAN_EID_SSID:
1239 bss_entry->ssid.ssid_len = element_len;
1240 memcpy(bss_entry->ssid.ssid, (current_ptr + 2),
1241 element_len);
1242 mwifiex_dbg(adapter, INFO,
1243 "info: InterpretIE: ssid: %-32s\n",
1244 bss_entry->ssid.ssid);
1245 break;
1246
1247 case WLAN_EID_SUPP_RATES:
1248 memcpy(bss_entry->data_rates, current_ptr + 2,
1249 element_len);
1250 memcpy(bss_entry->supported_rates, current_ptr + 2,
1251 element_len);
1252 rate_size = element_len;
1253 found_data_rate_ie = true;
1254 break;
1255
1256 case WLAN_EID_FH_PARAMS:
1257 fh_param_set =
1258 (struct ieee_types_fh_param_set *) current_ptr;
1259 memcpy(&bss_entry->phy_param_set.fh_param_set,
1260 fh_param_set,
1261 sizeof(struct ieee_types_fh_param_set));
1262 break;
1263
1264 case WLAN_EID_DS_PARAMS:
1265 ds_param_set =
1266 (struct ieee_types_ds_param_set *) current_ptr;
1267
1268 bss_entry->channel = ds_param_set->current_chan;
1269
1270 memcpy(&bss_entry->phy_param_set.ds_param_set,
1271 ds_param_set,
1272 sizeof(struct ieee_types_ds_param_set));
1273 break;
1274
1275 case WLAN_EID_CF_PARAMS:
1276 cf_param_set =
1277 (struct ieee_types_cf_param_set *) current_ptr;
1278 memcpy(&bss_entry->ss_param_set.cf_param_set,
1279 cf_param_set,
1280 sizeof(struct ieee_types_cf_param_set));
1281 break;
1282
1283 case WLAN_EID_IBSS_PARAMS:
1284 ibss_param_set =
1285 (struct ieee_types_ibss_param_set *)
1286 current_ptr;
1287 memcpy(&bss_entry->ss_param_set.ibss_param_set,
1288 ibss_param_set,
1289 sizeof(struct ieee_types_ibss_param_set));
1290 break;
1291
1292 case WLAN_EID_ERP_INFO:
1293 bss_entry->erp_flags = *(current_ptr + 2);
1294 break;
1295
1296 case WLAN_EID_PWR_CONSTRAINT:
1297 bss_entry->local_constraint = *(current_ptr + 2);
1298 bss_entry->sensed_11h = true;
1299 break;
1300
1301 case WLAN_EID_CHANNEL_SWITCH:
1302 bss_entry->chan_sw_ie_present = true;
1303 case WLAN_EID_PWR_CAPABILITY:
1304 case WLAN_EID_TPC_REPORT:
1305 case WLAN_EID_QUIET:
1306 bss_entry->sensed_11h = true;
1307 break;
1308
1309 case WLAN_EID_EXT_SUPP_RATES:
1310 /*
1311 * Only process extended supported rate
1312 * if data rate is already found.
1313 * Data rate IE should come before
1314 * extended supported rate IE
1315 */
1316 if (found_data_rate_ie) {
1317 if ((element_len + rate_size) >
1318 MWIFIEX_SUPPORTED_RATES)
1319 bytes_to_copy =
1320 (MWIFIEX_SUPPORTED_RATES -
1321 rate_size);
1322 else
1323 bytes_to_copy = element_len;
1324
1325 rate = (u8 *) bss_entry->data_rates;
1326 rate += rate_size;
1327 memcpy(rate, current_ptr + 2, bytes_to_copy);
1328
1329 rate = (u8 *) bss_entry->supported_rates;
1330 rate += rate_size;
1331 memcpy(rate, current_ptr + 2, bytes_to_copy);
1332 }
1333 break;
1334
1335 case WLAN_EID_VENDOR_SPECIFIC:
1336 vendor_ie = (struct ieee_types_vendor_specific *)
1337 current_ptr;
1338
1339 if (!memcmp
1340 (vendor_ie->vend_hdr.oui, wpa_oui,
1341 sizeof(wpa_oui))) {
1342 bss_entry->bcn_wpa_ie =
1343 (struct ieee_types_vendor_specific *)
1344 current_ptr;
1345 bss_entry->wpa_offset = (u16)
1346 (current_ptr - bss_entry->beacon_buf);
1347 } else if (!memcmp(vendor_ie->vend_hdr.oui, wmm_oui,
1348 sizeof(wmm_oui))) {
1349 if (total_ie_len ==
1350 sizeof(struct ieee_types_wmm_parameter) ||
1351 total_ie_len ==
1352 sizeof(struct ieee_types_wmm_info))
1353 /*
1354 * Only accept and copy the WMM IE if
1355 * it matches the size expected for the
1356 * WMM Info IE or the WMM Parameter IE.
1357 */
1358 memcpy((u8 *) &bss_entry->wmm_ie,
1359 current_ptr, total_ie_len);
1360 }
1361 break;
1362 case WLAN_EID_RSN:
1363 bss_entry->bcn_rsn_ie =
1364 (struct ieee_types_generic *) current_ptr;
1365 bss_entry->rsn_offset = (u16) (current_ptr -
1366 bss_entry->beacon_buf);
1367 break;
1368 case WLAN_EID_BSS_AC_ACCESS_DELAY:
1369 bss_entry->bcn_wapi_ie =
1370 (struct ieee_types_generic *) current_ptr;
1371 bss_entry->wapi_offset = (u16) (current_ptr -
1372 bss_entry->beacon_buf);
1373 break;
1374 case WLAN_EID_HT_CAPABILITY:
1375 bss_entry->bcn_ht_cap = (struct ieee80211_ht_cap *)
1376 (current_ptr +
1377 sizeof(struct ieee_types_header));
1378 bss_entry->ht_cap_offset = (u16) (current_ptr +
1379 sizeof(struct ieee_types_header) -
1380 bss_entry->beacon_buf);
1381 break;
1382 case WLAN_EID_HT_OPERATION:
1383 bss_entry->bcn_ht_oper =
1384 (struct ieee80211_ht_operation *)(current_ptr +
1385 sizeof(struct ieee_types_header));
1386 bss_entry->ht_info_offset = (u16) (current_ptr +
1387 sizeof(struct ieee_types_header) -
1388 bss_entry->beacon_buf);
1389 break;
1390 case WLAN_EID_VHT_CAPABILITY:
1391 bss_entry->disable_11ac = false;
1392 bss_entry->bcn_vht_cap =
1393 (void *)(current_ptr +
1394 sizeof(struct ieee_types_header));
1395 bss_entry->vht_cap_offset =
1396 (u16)((u8 *)bss_entry->bcn_vht_cap -
1397 bss_entry->beacon_buf);
1398 break;
1399 case WLAN_EID_VHT_OPERATION:
1400 bss_entry->bcn_vht_oper =
1401 (void *)(current_ptr +
1402 sizeof(struct ieee_types_header));
1403 bss_entry->vht_info_offset =
1404 (u16)((u8 *)bss_entry->bcn_vht_oper -
1405 bss_entry->beacon_buf);
1406 break;
1407 case WLAN_EID_BSS_COEX_2040:
1408 bss_entry->bcn_bss_co_2040 = current_ptr;
1409 bss_entry->bss_co_2040_offset =
1410 (u16) (current_ptr - bss_entry->beacon_buf);
1411 break;
1412 case WLAN_EID_EXT_CAPABILITY:
1413 bss_entry->bcn_ext_cap = current_ptr;
1414 bss_entry->ext_cap_offset =
1415 (u16) (current_ptr - bss_entry->beacon_buf);
1416 break;
1417 case WLAN_EID_OPMODE_NOTIF:
1418 bss_entry->oper_mode = (void *)current_ptr;
1419 bss_entry->oper_mode_offset =
1420 (u16)((u8 *)bss_entry->oper_mode -
1421 bss_entry->beacon_buf);
1422 break;
1423 default:
1424 break;
1425 }
1426
1427 current_ptr += element_len + 2;
1428
1429 /* Need to account for IE ID and IE Len */
1430 bytes_left -= (element_len + 2);
1431
1432 } /* while (bytes_left > 2) */
1433 return ret;
1434 }
1435
1436 /*
1437 * This function converts radio type scan parameter to a band configuration
1438 * to be used in join command.
1439 */
1440 static u8
1441 mwifiex_radio_type_to_band(u8 radio_type)
1442 {
1443 switch (radio_type) {
1444 case HostCmd_SCAN_RADIO_TYPE_A:
1445 return BAND_A;
1446 case HostCmd_SCAN_RADIO_TYPE_BG:
1447 default:
1448 return BAND_G;
1449 }
1450 }
1451
1452 /*
1453 * This is an internal function used to start a scan based on an input
1454 * configuration.
1455 *
1456 * This uses the input user scan configuration information when provided in
1457 * order to send the appropriate scan commands to firmware to populate or
1458 * update the internal driver scan table.
1459 */
1460 int mwifiex_scan_networks(struct mwifiex_private *priv,
1461 const struct mwifiex_user_scan_cfg *user_scan_in)
1462 {
1463 int ret;
1464 struct mwifiex_adapter *adapter = priv->adapter;
1465 struct cmd_ctrl_node *cmd_node;
1466 union mwifiex_scan_cmd_config_tlv *scan_cfg_out;
1467 struct mwifiex_ie_types_chan_list_param_set *chan_list_out;
1468 struct mwifiex_chan_scan_param_set *scan_chan_list;
1469 u8 filtered_scan;
1470 u8 scan_current_chan_only;
1471 u8 max_chan_per_scan;
1472 unsigned long flags;
1473
1474 if (adapter->scan_processing) {
1475 mwifiex_dbg(adapter, WARN,
1476 "cmd: Scan already in process...\n");
1477 return -EBUSY;
1478 }
1479
1480 if (priv->scan_block) {
1481 mwifiex_dbg(adapter, WARN,
1482 "cmd: Scan is blocked during association...\n");
1483 return -EBUSY;
1484 }
1485
1486 if (adapter->surprise_removed || adapter->is_cmd_timedout) {
1487 mwifiex_dbg(adapter, ERROR,
1488 "Ignore scan. Card removed or firmware in bad state\n");
1489 return -EFAULT;
1490 }
1491
1492 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
1493 adapter->scan_processing = true;
1494 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
1495
1496 scan_cfg_out = kzalloc(sizeof(union mwifiex_scan_cmd_config_tlv),
1497 GFP_KERNEL);
1498 if (!scan_cfg_out) {
1499 ret = -ENOMEM;
1500 goto done;
1501 }
1502
1503 scan_chan_list = kcalloc(MWIFIEX_USER_SCAN_CHAN_MAX,
1504 sizeof(struct mwifiex_chan_scan_param_set),
1505 GFP_KERNEL);
1506 if (!scan_chan_list) {
1507 kfree(scan_cfg_out);
1508 ret = -ENOMEM;
1509 goto done;
1510 }
1511
1512 mwifiex_config_scan(priv, user_scan_in, &scan_cfg_out->config,
1513 &chan_list_out, scan_chan_list, &max_chan_per_scan,
1514 &filtered_scan, &scan_current_chan_only);
1515
1516 ret = mwifiex_scan_channel_list(priv, max_chan_per_scan, filtered_scan,
1517 &scan_cfg_out->config, chan_list_out,
1518 scan_chan_list);
1519
1520 /* Get scan command from scan_pending_q and put to cmd_pending_q */
1521 if (!ret) {
1522 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
1523 if (!list_empty(&adapter->scan_pending_q)) {
1524 cmd_node = list_first_entry(&adapter->scan_pending_q,
1525 struct cmd_ctrl_node, list);
1526 list_del(&cmd_node->list);
1527 spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
1528 flags);
1529 mwifiex_insert_cmd_to_pending_q(adapter, cmd_node,
1530 true);
1531 queue_work(adapter->workqueue, &adapter->main_work);
1532
1533 /* Perform internal scan synchronously */
1534 if (!priv->scan_request) {
1535 mwifiex_dbg(adapter, INFO,
1536 "wait internal scan\n");
1537 mwifiex_wait_queue_complete(adapter, cmd_node);
1538 }
1539 } else {
1540 spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
1541 flags);
1542 }
1543 }
1544
1545 kfree(scan_cfg_out);
1546 kfree(scan_chan_list);
1547 done:
1548 if (ret) {
1549 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
1550 adapter->scan_processing = false;
1551 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
1552 }
1553 return ret;
1554 }
1555
1556 /*
1557 * This function prepares a scan command to be sent to the firmware.
1558 *
1559 * This uses the scan command configuration sent to the command processing
1560 * module in command preparation stage to configure a scan command structure
1561 * to send to firmware.
1562 *
1563 * The fixed fields specifying the BSS type and BSSID filters as well as a
1564 * variable number/length of TLVs are sent in the command to firmware.
1565 *
1566 * Preparation also includes -
1567 * - Setting command ID, and proper size
1568 * - Ensuring correct endian-ness
1569 */
1570 int mwifiex_cmd_802_11_scan(struct host_cmd_ds_command *cmd,
1571 struct mwifiex_scan_cmd_config *scan_cfg)
1572 {
1573 struct host_cmd_ds_802_11_scan *scan_cmd = &cmd->params.scan;
1574
1575 /* Set fixed field variables in scan command */
1576 scan_cmd->bss_mode = scan_cfg->bss_mode;
1577 memcpy(scan_cmd->bssid, scan_cfg->specific_bssid,
1578 sizeof(scan_cmd->bssid));
1579 memcpy(scan_cmd->tlv_buffer, scan_cfg->tlv_buf, scan_cfg->tlv_buf_len);
1580
1581 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_SCAN);
1582
1583 /* Size is equal to the sizeof(fixed portions) + the TLV len + header */
1584 cmd->size = cpu_to_le16((u16) (sizeof(scan_cmd->bss_mode)
1585 + sizeof(scan_cmd->bssid)
1586 + scan_cfg->tlv_buf_len + S_DS_GEN));
1587
1588 return 0;
1589 }
1590
1591 /*
1592 * This function checks compatibility of requested network with current
1593 * driver settings.
1594 */
1595 int mwifiex_check_network_compatibility(struct mwifiex_private *priv,
1596 struct mwifiex_bssdescriptor *bss_desc)
1597 {
1598 int ret = -1;
1599
1600 if (!bss_desc)
1601 return -1;
1602
1603 if ((mwifiex_get_cfp(priv, (u8) bss_desc->bss_band,
1604 (u16) bss_desc->channel, 0))) {
1605 switch (priv->bss_mode) {
1606 case NL80211_IFTYPE_STATION:
1607 case NL80211_IFTYPE_ADHOC:
1608 ret = mwifiex_is_network_compatible(priv, bss_desc,
1609 priv->bss_mode);
1610 if (ret)
1611 mwifiex_dbg(priv->adapter, ERROR,
1612 "Incompatible network settings\n");
1613 break;
1614 default:
1615 ret = 0;
1616 }
1617 }
1618
1619 return ret;
1620 }
1621
1622 /* This function checks if SSID string contains all zeroes or length is zero */
1623 static bool mwifiex_is_hidden_ssid(struct cfg80211_ssid *ssid)
1624 {
1625 int idx;
1626
1627 for (idx = 0; idx < ssid->ssid_len; idx++) {
1628 if (ssid->ssid[idx])
1629 return false;
1630 }
1631
1632 return true;
1633 }
1634
1635 /* This function checks if any hidden SSID found in passive scan channels
1636 * and save those channels for specific SSID active scan
1637 */
1638 static int mwifiex_save_hidden_ssid_channels(struct mwifiex_private *priv,
1639 struct cfg80211_bss *bss)
1640 {
1641 struct mwifiex_bssdescriptor *bss_desc;
1642 int ret;
1643 int chid;
1644
1645 /* Allocate and fill new bss descriptor */
1646 bss_desc = kzalloc(sizeof(*bss_desc), GFP_KERNEL);
1647 if (!bss_desc)
1648 return -ENOMEM;
1649
1650 ret = mwifiex_fill_new_bss_desc(priv, bss, bss_desc);
1651 if (ret)
1652 goto done;
1653
1654 if (mwifiex_is_hidden_ssid(&bss_desc->ssid)) {
1655 mwifiex_dbg(priv->adapter, INFO, "found hidden SSID\n");
1656 for (chid = 0 ; chid < MWIFIEX_USER_SCAN_CHAN_MAX; chid++) {
1657 if (priv->hidden_chan[chid].chan_number ==
1658 bss->channel->hw_value)
1659 break;
1660
1661 if (!priv->hidden_chan[chid].chan_number) {
1662 priv->hidden_chan[chid].chan_number =
1663 bss->channel->hw_value;
1664 priv->hidden_chan[chid].radio_type =
1665 bss->channel->band;
1666 priv->hidden_chan[chid].scan_type =
1667 MWIFIEX_SCAN_TYPE_ACTIVE;
1668 break;
1669 }
1670 }
1671 }
1672
1673 done:
1674 kfree(bss_desc);
1675 return 0;
1676 }
1677
1678 static int mwifiex_update_curr_bss_params(struct mwifiex_private *priv,
1679 struct cfg80211_bss *bss)
1680 {
1681 struct mwifiex_bssdescriptor *bss_desc;
1682 int ret;
1683 unsigned long flags;
1684
1685 /* Allocate and fill new bss descriptor */
1686 bss_desc = kzalloc(sizeof(struct mwifiex_bssdescriptor), GFP_KERNEL);
1687 if (!bss_desc)
1688 return -ENOMEM;
1689
1690 ret = mwifiex_fill_new_bss_desc(priv, bss, bss_desc);
1691 if (ret)
1692 goto done;
1693
1694 ret = mwifiex_check_network_compatibility(priv, bss_desc);
1695 if (ret)
1696 goto done;
1697
1698 spin_lock_irqsave(&priv->curr_bcn_buf_lock, flags);
1699 /* Make a copy of current BSSID descriptor */
1700 memcpy(&priv->curr_bss_params.bss_descriptor, bss_desc,
1701 sizeof(priv->curr_bss_params.bss_descriptor));
1702
1703 /* The contents of beacon_ie will be copied to its own buffer
1704 * in mwifiex_save_curr_bcn()
1705 */
1706 mwifiex_save_curr_bcn(priv);
1707 spin_unlock_irqrestore(&priv->curr_bcn_buf_lock, flags);
1708
1709 done:
1710 /* beacon_ie buffer was allocated in function
1711 * mwifiex_fill_new_bss_desc(). Free it now.
1712 */
1713 kfree(bss_desc->beacon_buf);
1714 kfree(bss_desc);
1715 return 0;
1716 }
1717
1718 static int
1719 mwifiex_parse_single_response_buf(struct mwifiex_private *priv, u8 **bss_info,
1720 u32 *bytes_left, u64 fw_tsf, u8 *radio_type,
1721 bool ext_scan, s32 rssi_val)
1722 {
1723 struct mwifiex_adapter *adapter = priv->adapter;
1724 struct mwifiex_chan_freq_power *cfp;
1725 struct cfg80211_bss *bss;
1726 u8 bssid[ETH_ALEN];
1727 s32 rssi;
1728 const u8 *ie_buf;
1729 size_t ie_len;
1730 u16 channel = 0;
1731 u16 beacon_size = 0;
1732 u32 curr_bcn_bytes;
1733 u32 freq;
1734 u16 beacon_period;
1735 u16 cap_info_bitmap;
1736 u8 *current_ptr;
1737 u64 timestamp;
1738 struct mwifiex_fixed_bcn_param *bcn_param;
1739 struct mwifiex_bss_priv *bss_priv;
1740
1741 if (*bytes_left >= sizeof(beacon_size)) {
1742 /* Extract & convert beacon size from command buffer */
1743 beacon_size = le16_to_cpu(*(__le16 *)(*bss_info));
1744 *bytes_left -= sizeof(beacon_size);
1745 *bss_info += sizeof(beacon_size);
1746 }
1747
1748 if (!beacon_size || beacon_size > *bytes_left) {
1749 *bss_info += *bytes_left;
1750 *bytes_left = 0;
1751 return -EFAULT;
1752 }
1753
1754 /* Initialize the current working beacon pointer for this BSS
1755 * iteration
1756 */
1757 current_ptr = *bss_info;
1758
1759 /* Advance the return beacon pointer past the current beacon */
1760 *bss_info += beacon_size;
1761 *bytes_left -= beacon_size;
1762
1763 curr_bcn_bytes = beacon_size;
1764
1765 /* First 5 fields are bssid, RSSI(for legacy scan only),
1766 * time stamp, beacon interval, and capability information
1767 */
1768 if (curr_bcn_bytes < ETH_ALEN + sizeof(u8) +
1769 sizeof(struct mwifiex_fixed_bcn_param)) {
1770 mwifiex_dbg(adapter, ERROR,
1771 "InterpretIE: not enough bytes left\n");
1772 return -EFAULT;
1773 }
1774
1775 memcpy(bssid, current_ptr, ETH_ALEN);
1776 current_ptr += ETH_ALEN;
1777 curr_bcn_bytes -= ETH_ALEN;
1778
1779 if (!ext_scan) {
1780 rssi = (s32) *current_ptr;
1781 rssi = (-rssi) * 100; /* Convert dBm to mBm */
1782 current_ptr += sizeof(u8);
1783 curr_bcn_bytes -= sizeof(u8);
1784 mwifiex_dbg(adapter, INFO,
1785 "info: InterpretIE: RSSI=%d\n", rssi);
1786 } else {
1787 rssi = rssi_val;
1788 }
1789
1790 bcn_param = (struct mwifiex_fixed_bcn_param *)current_ptr;
1791 current_ptr += sizeof(*bcn_param);
1792 curr_bcn_bytes -= sizeof(*bcn_param);
1793
1794 timestamp = le64_to_cpu(bcn_param->timestamp);
1795 beacon_period = le16_to_cpu(bcn_param->beacon_period);
1796
1797 cap_info_bitmap = le16_to_cpu(bcn_param->cap_info_bitmap);
1798 mwifiex_dbg(adapter, INFO,
1799 "info: InterpretIE: capabilities=0x%X\n",
1800 cap_info_bitmap);
1801
1802 /* Rest of the current buffer are IE's */
1803 ie_buf = current_ptr;
1804 ie_len = curr_bcn_bytes;
1805 mwifiex_dbg(adapter, INFO,
1806 "info: InterpretIE: IELength for this AP = %d\n",
1807 curr_bcn_bytes);
1808
1809 while (curr_bcn_bytes >= sizeof(struct ieee_types_header)) {
1810 u8 element_id, element_len;
1811
1812 element_id = *current_ptr;
1813 element_len = *(current_ptr + 1);
1814 if (curr_bcn_bytes < element_len +
1815 sizeof(struct ieee_types_header)) {
1816 mwifiex_dbg(adapter, ERROR,
1817 "%s: bytes left < IE length\n", __func__);
1818 return -EFAULT;
1819 }
1820 if (element_id == WLAN_EID_DS_PARAMS) {
1821 channel = *(current_ptr +
1822 sizeof(struct ieee_types_header));
1823 break;
1824 }
1825
1826 current_ptr += element_len + sizeof(struct ieee_types_header);
1827 curr_bcn_bytes -= element_len +
1828 sizeof(struct ieee_types_header);
1829 }
1830
1831 if (channel) {
1832 struct ieee80211_channel *chan;
1833 u8 band;
1834
1835 /* Skip entry if on csa closed channel */
1836 if (channel == priv->csa_chan) {
1837 mwifiex_dbg(adapter, WARN,
1838 "Dropping entry on csa closed channel\n");
1839 return 0;
1840 }
1841
1842 band = BAND_G;
1843 if (radio_type)
1844 band = mwifiex_radio_type_to_band(*radio_type &
1845 (BIT(0) | BIT(1)));
1846
1847 cfp = mwifiex_get_cfp(priv, band, channel, 0);
1848
1849 freq = cfp ? cfp->freq : 0;
1850
1851 chan = ieee80211_get_channel(priv->wdev.wiphy, freq);
1852
1853 if (chan && !(chan->flags & IEEE80211_CHAN_DISABLED)) {
1854 bss = cfg80211_inform_bss(priv->wdev.wiphy,
1855 chan, CFG80211_BSS_FTYPE_UNKNOWN,
1856 bssid, timestamp,
1857 cap_info_bitmap, beacon_period,
1858 ie_buf, ie_len, rssi, GFP_KERNEL);
1859 if (bss) {
1860 bss_priv = (struct mwifiex_bss_priv *)bss->priv;
1861 bss_priv->band = band;
1862 bss_priv->fw_tsf = fw_tsf;
1863 if (priv->media_connected &&
1864 !memcmp(bssid, priv->curr_bss_params.
1865 bss_descriptor.mac_address,
1866 ETH_ALEN))
1867 mwifiex_update_curr_bss_params(priv,
1868 bss);
1869 cfg80211_put_bss(priv->wdev.wiphy, bss);
1870 }
1871
1872 if ((chan->flags & IEEE80211_CHAN_RADAR) ||
1873 (chan->flags & IEEE80211_CHAN_NO_IR)) {
1874 mwifiex_dbg(adapter, INFO,
1875 "radar or passive channel %d\n",
1876 channel);
1877 mwifiex_save_hidden_ssid_channels(priv, bss);
1878 }
1879 }
1880 } else {
1881 mwifiex_dbg(adapter, WARN, "missing BSS channel IE\n");
1882 }
1883
1884 return 0;
1885 }
1886
1887 static void mwifiex_complete_scan(struct mwifiex_private *priv)
1888 {
1889 struct mwifiex_adapter *adapter = priv->adapter;
1890
1891 adapter->survey_idx = 0;
1892 if (adapter->curr_cmd->wait_q_enabled) {
1893 adapter->cmd_wait_q.status = 0;
1894 if (!priv->scan_request) {
1895 mwifiex_dbg(adapter, INFO,
1896 "complete internal scan\n");
1897 mwifiex_complete_cmd(adapter, adapter->curr_cmd);
1898 }
1899 }
1900 }
1901
1902 /* This function checks if any hidden SSID found in passive scan channels
1903 * and do specific SSID active scan for those channels
1904 */
1905 static int
1906 mwifiex_active_scan_req_for_passive_chan(struct mwifiex_private *priv)
1907 {
1908 int ret;
1909 struct mwifiex_adapter *adapter = priv->adapter;
1910 u8 id = 0;
1911 struct mwifiex_user_scan_cfg *user_scan_cfg;
1912
1913 if (adapter->active_scan_triggered || !priv->scan_request ||
1914 priv->scan_aborting) {
1915 adapter->active_scan_triggered = false;
1916 return 0;
1917 }
1918
1919 if (!priv->hidden_chan[0].chan_number) {
1920 mwifiex_dbg(adapter, INFO, "No BSS with hidden SSID found on DFS channels\n");
1921 return 0;
1922 }
1923 user_scan_cfg = kzalloc(sizeof(*user_scan_cfg), GFP_KERNEL);
1924
1925 if (!user_scan_cfg)
1926 return -ENOMEM;
1927
1928 memset(user_scan_cfg, 0, sizeof(*user_scan_cfg));
1929
1930 for (id = 0; id < MWIFIEX_USER_SCAN_CHAN_MAX; id++) {
1931 if (!priv->hidden_chan[id].chan_number)
1932 break;
1933 memcpy(&user_scan_cfg->chan_list[id],
1934 &priv->hidden_chan[id],
1935 sizeof(struct mwifiex_user_scan_chan));
1936 }
1937
1938 adapter->active_scan_triggered = true;
1939 ether_addr_copy(user_scan_cfg->random_mac, priv->random_mac);
1940 user_scan_cfg->num_ssids = priv->scan_request->n_ssids;
1941 user_scan_cfg->ssid_list = priv->scan_request->ssids;
1942
1943 ret = mwifiex_scan_networks(priv, user_scan_cfg);
1944 kfree(user_scan_cfg);
1945
1946 memset(&priv->hidden_chan, 0, sizeof(priv->hidden_chan));
1947
1948 if (ret) {
1949 dev_err(priv->adapter->dev, "scan failed: %d\n", ret);
1950 return ret;
1951 }
1952
1953 return 0;
1954 }
1955 static void mwifiex_check_next_scan_command(struct mwifiex_private *priv)
1956 {
1957 struct mwifiex_adapter *adapter = priv->adapter;
1958 struct cmd_ctrl_node *cmd_node;
1959 unsigned long flags;
1960
1961 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
1962 if (list_empty(&adapter->scan_pending_q)) {
1963 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
1964
1965 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
1966 adapter->scan_processing = false;
1967 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
1968
1969 mwifiex_active_scan_req_for_passive_chan(priv);
1970
1971 if (!adapter->ext_scan)
1972 mwifiex_complete_scan(priv);
1973
1974 if (priv->scan_request) {
1975 struct cfg80211_scan_info info = {
1976 .aborted = false,
1977 };
1978
1979 mwifiex_dbg(adapter, INFO,
1980 "info: notifying scan done\n");
1981 cfg80211_scan_done(priv->scan_request, &info);
1982 priv->scan_request = NULL;
1983 priv->scan_aborting = false;
1984 } else {
1985 priv->scan_aborting = false;
1986 mwifiex_dbg(adapter, INFO,
1987 "info: scan already aborted\n");
1988 }
1989 } else if ((priv->scan_aborting && !priv->scan_request) ||
1990 priv->scan_block) {
1991 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
1992
1993 mwifiex_cancel_pending_scan_cmd(adapter);
1994
1995 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
1996 adapter->scan_processing = false;
1997 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
1998
1999 if (!adapter->active_scan_triggered) {
2000 if (priv->scan_request) {
2001 struct cfg80211_scan_info info = {
2002 .aborted = true,
2003 };
2004
2005 mwifiex_dbg(adapter, INFO,
2006 "info: aborting scan\n");
2007 cfg80211_scan_done(priv->scan_request, &info);
2008 priv->scan_request = NULL;
2009 priv->scan_aborting = false;
2010 } else {
2011 priv->scan_aborting = false;
2012 mwifiex_dbg(adapter, INFO,
2013 "info: scan already aborted\n");
2014 }
2015 }
2016 } else {
2017 /* Get scan command from scan_pending_q and put to
2018 * cmd_pending_q
2019 */
2020 cmd_node = list_first_entry(&adapter->scan_pending_q,
2021 struct cmd_ctrl_node, list);
2022 list_del(&cmd_node->list);
2023 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
2024 mwifiex_insert_cmd_to_pending_q(adapter, cmd_node, true);
2025 }
2026
2027 return;
2028 }
2029
2030 void mwifiex_cancel_scan(struct mwifiex_adapter *adapter)
2031 {
2032 struct mwifiex_private *priv;
2033 unsigned long cmd_flags;
2034 int i;
2035
2036 mwifiex_cancel_pending_scan_cmd(adapter);
2037
2038 if (adapter->scan_processing) {
2039 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, cmd_flags);
2040 adapter->scan_processing = false;
2041 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, cmd_flags);
2042 for (i = 0; i < adapter->priv_num; i++) {
2043 priv = adapter->priv[i];
2044 if (!priv)
2045 continue;
2046 if (priv->scan_request) {
2047 struct cfg80211_scan_info info = {
2048 .aborted = true,
2049 };
2050
2051 mwifiex_dbg(adapter, INFO,
2052 "info: aborting scan\n");
2053 cfg80211_scan_done(priv->scan_request, &info);
2054 priv->scan_request = NULL;
2055 priv->scan_aborting = false;
2056 }
2057 }
2058 }
2059 }
2060
2061 /*
2062 * This function handles the command response of scan.
2063 *
2064 * The response buffer for the scan command has the following
2065 * memory layout:
2066 *
2067 * .-------------------------------------------------------------.
2068 * | Header (4 * sizeof(t_u16)): Standard command response hdr |
2069 * .-------------------------------------------------------------.
2070 * | BufSize (t_u16) : sizeof the BSS Description data |
2071 * .-------------------------------------------------------------.
2072 * | NumOfSet (t_u8) : Number of BSS Descs returned |
2073 * .-------------------------------------------------------------.
2074 * | BSSDescription data (variable, size given in BufSize) |
2075 * .-------------------------------------------------------------.
2076 * | TLV data (variable, size calculated using Header->Size, |
2077 * | BufSize and sizeof the fixed fields above) |
2078 * .-------------------------------------------------------------.
2079 */
2080 int mwifiex_ret_802_11_scan(struct mwifiex_private *priv,
2081 struct host_cmd_ds_command *resp)
2082 {
2083 int ret = 0;
2084 struct mwifiex_adapter *adapter = priv->adapter;
2085 struct host_cmd_ds_802_11_scan_rsp *scan_rsp;
2086 struct mwifiex_ie_types_data *tlv_data;
2087 struct mwifiex_ie_types_tsf_timestamp *tsf_tlv;
2088 u8 *bss_info;
2089 u32 scan_resp_size;
2090 u32 bytes_left;
2091 u32 idx;
2092 u32 tlv_buf_size;
2093 struct mwifiex_ie_types_chan_band_list_param_set *chan_band_tlv;
2094 struct chan_band_param_set *chan_band;
2095 u8 is_bgscan_resp;
2096 __le64 fw_tsf = 0;
2097 u8 *radio_type;
2098 struct cfg80211_wowlan_nd_match *pmatch;
2099 struct cfg80211_sched_scan_request *nd_config = NULL;
2100
2101 is_bgscan_resp = (le16_to_cpu(resp->command)
2102 == HostCmd_CMD_802_11_BG_SCAN_QUERY);
2103 if (is_bgscan_resp)
2104 scan_rsp = &resp->params.bg_scan_query_resp.scan_resp;
2105 else
2106 scan_rsp = &resp->params.scan_resp;
2107
2108
2109 if (scan_rsp->number_of_sets > MWIFIEX_MAX_AP) {
2110 mwifiex_dbg(adapter, ERROR,
2111 "SCAN_RESP: too many AP returned (%d)\n",
2112 scan_rsp->number_of_sets);
2113 ret = -1;
2114 goto check_next_scan;
2115 }
2116
2117 /* Check csa channel expiry before parsing scan response */
2118 mwifiex_11h_get_csa_closed_channel(priv);
2119
2120 bytes_left = le16_to_cpu(scan_rsp->bss_descript_size);
2121 mwifiex_dbg(adapter, INFO,
2122 "info: SCAN_RESP: bss_descript_size %d\n",
2123 bytes_left);
2124
2125 scan_resp_size = le16_to_cpu(resp->size);
2126
2127 mwifiex_dbg(adapter, INFO,
2128 "info: SCAN_RESP: returned %d APs before parsing\n",
2129 scan_rsp->number_of_sets);
2130
2131 bss_info = scan_rsp->bss_desc_and_tlv_buffer;
2132
2133 /*
2134 * The size of the TLV buffer is equal to the entire command response
2135 * size (scan_resp_size) minus the fixed fields (sizeof()'s), the
2136 * BSS Descriptions (bss_descript_size as bytesLef) and the command
2137 * response header (S_DS_GEN)
2138 */
2139 tlv_buf_size = scan_resp_size - (bytes_left
2140 + sizeof(scan_rsp->bss_descript_size)
2141 + sizeof(scan_rsp->number_of_sets)
2142 + S_DS_GEN);
2143
2144 tlv_data = (struct mwifiex_ie_types_data *) (scan_rsp->
2145 bss_desc_and_tlv_buffer +
2146 bytes_left);
2147
2148 /* Search the TLV buffer space in the scan response for any valid
2149 TLVs */
2150 mwifiex_ret_802_11_scan_get_tlv_ptrs(adapter, tlv_data, tlv_buf_size,
2151 TLV_TYPE_TSFTIMESTAMP,
2152 (struct mwifiex_ie_types_data **)
2153 &tsf_tlv);
2154
2155 /* Search the TLV buffer space in the scan response for any valid
2156 TLVs */
2157 mwifiex_ret_802_11_scan_get_tlv_ptrs(adapter, tlv_data, tlv_buf_size,
2158 TLV_TYPE_CHANNELBANDLIST,
2159 (struct mwifiex_ie_types_data **)
2160 &chan_band_tlv);
2161
2162 #ifdef CONFIG_PM
2163 if (priv->wdev.wiphy->wowlan_config)
2164 nd_config = priv->wdev.wiphy->wowlan_config->nd_config;
2165 #endif
2166
2167 if (nd_config) {
2168 adapter->nd_info =
2169 kzalloc(sizeof(struct cfg80211_wowlan_nd_match) +
2170 sizeof(struct cfg80211_wowlan_nd_match *) *
2171 scan_rsp->number_of_sets, GFP_ATOMIC);
2172
2173 if (adapter->nd_info)
2174 adapter->nd_info->n_matches = scan_rsp->number_of_sets;
2175 }
2176
2177 for (idx = 0; idx < scan_rsp->number_of_sets && bytes_left; idx++) {
2178 /*
2179 * If the TSF TLV was appended to the scan results, save this
2180 * entry's TSF value in the fw_tsf field. It is the firmware's
2181 * TSF value at the time the beacon or probe response was
2182 * received.
2183 */
2184 if (tsf_tlv)
2185 memcpy(&fw_tsf, &tsf_tlv->tsf_data[idx * TSF_DATA_SIZE],
2186 sizeof(fw_tsf));
2187
2188 if (chan_band_tlv) {
2189 chan_band = &chan_band_tlv->chan_band_param[idx];
2190 radio_type = &chan_band->radio_type;
2191 } else {
2192 radio_type = NULL;
2193 }
2194
2195 if (chan_band_tlv && adapter->nd_info) {
2196 adapter->nd_info->matches[idx] =
2197 kzalloc(sizeof(*pmatch) + sizeof(u32),
2198 GFP_ATOMIC);
2199
2200 pmatch = adapter->nd_info->matches[idx];
2201
2202 if (pmatch) {
2203 pmatch->n_channels = 1;
2204 pmatch->channels[0] = chan_band->chan_number;
2205 }
2206 }
2207
2208 ret = mwifiex_parse_single_response_buf(priv, &bss_info,
2209 &bytes_left,
2210 le64_to_cpu(fw_tsf),
2211 radio_type, false, 0);
2212 if (ret)
2213 goto check_next_scan;
2214 }
2215
2216 check_next_scan:
2217 mwifiex_check_next_scan_command(priv);
2218 return ret;
2219 }
2220
2221 /*
2222 * This function prepares an extended scan command to be sent to the firmware
2223 *
2224 * This uses the scan command configuration sent to the command processing
2225 * module in command preparation stage to configure a extended scan command
2226 * structure to send to firmware.
2227 */
2228 int mwifiex_cmd_802_11_scan_ext(struct mwifiex_private *priv,
2229 struct host_cmd_ds_command *cmd,
2230 void *data_buf)
2231 {
2232 struct host_cmd_ds_802_11_scan_ext *ext_scan = &cmd->params.ext_scan;
2233 struct mwifiex_scan_cmd_config *scan_cfg = data_buf;
2234
2235 memcpy(ext_scan->tlv_buffer, scan_cfg->tlv_buf, scan_cfg->tlv_buf_len);
2236
2237 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_SCAN_EXT);
2238
2239 /* Size is equal to the sizeof(fixed portions) + the TLV len + header */
2240 cmd->size = cpu_to_le16((u16)(sizeof(ext_scan->reserved)
2241 + scan_cfg->tlv_buf_len + S_DS_GEN));
2242
2243 return 0;
2244 }
2245
2246 /* This function prepares an background scan config command to be sent
2247 * to the firmware
2248 */
2249 int mwifiex_cmd_802_11_bg_scan_config(struct mwifiex_private *priv,
2250 struct host_cmd_ds_command *cmd,
2251 void *data_buf)
2252 {
2253 struct host_cmd_ds_802_11_bg_scan_config *bgscan_config =
2254 &cmd->params.bg_scan_config;
2255 struct mwifiex_bg_scan_cfg *bgscan_cfg_in = data_buf;
2256 u8 *tlv_pos = bgscan_config->tlv;
2257 u8 num_probes;
2258 u32 ssid_len, chan_idx, scan_type, scan_dur, chan_num;
2259 int i;
2260 struct mwifiex_ie_types_num_probes *num_probes_tlv;
2261 struct mwifiex_ie_types_repeat_count *repeat_count_tlv;
2262 struct mwifiex_ie_types_min_rssi_threshold *rssi_threshold_tlv;
2263 struct mwifiex_ie_types_bgscan_start_later *start_later_tlv;
2264 struct mwifiex_ie_types_wildcard_ssid_params *wildcard_ssid_tlv;
2265 struct mwifiex_ie_types_chan_list_param_set *chan_list_tlv;
2266 struct mwifiex_chan_scan_param_set *temp_chan;
2267
2268 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_BG_SCAN_CONFIG);
2269 cmd->size = cpu_to_le16(sizeof(*bgscan_config) + S_DS_GEN);
2270
2271 bgscan_config->action = cpu_to_le16(bgscan_cfg_in->action);
2272 bgscan_config->enable = bgscan_cfg_in->enable;
2273 bgscan_config->bss_type = bgscan_cfg_in->bss_type;
2274 bgscan_config->scan_interval =
2275 cpu_to_le32(bgscan_cfg_in->scan_interval);
2276 bgscan_config->report_condition =
2277 cpu_to_le32(bgscan_cfg_in->report_condition);
2278
2279 /* stop sched scan */
2280 if (!bgscan_config->enable)
2281 return 0;
2282
2283 bgscan_config->chan_per_scan = bgscan_cfg_in->chan_per_scan;
2284
2285 num_probes = (bgscan_cfg_in->num_probes ? bgscan_cfg_in->
2286 num_probes : priv->adapter->scan_probes);
2287
2288 if (num_probes) {
2289 num_probes_tlv = (struct mwifiex_ie_types_num_probes *)tlv_pos;
2290 num_probes_tlv->header.type = cpu_to_le16(TLV_TYPE_NUMPROBES);
2291 num_probes_tlv->header.len =
2292 cpu_to_le16(sizeof(num_probes_tlv->num_probes));
2293 num_probes_tlv->num_probes = cpu_to_le16((u16)num_probes);
2294
2295 tlv_pos += sizeof(num_probes_tlv->header) +
2296 le16_to_cpu(num_probes_tlv->header.len);
2297 }
2298
2299 if (bgscan_cfg_in->repeat_count) {
2300 repeat_count_tlv =
2301 (struct mwifiex_ie_types_repeat_count *)tlv_pos;
2302 repeat_count_tlv->header.type =
2303 cpu_to_le16(TLV_TYPE_REPEAT_COUNT);
2304 repeat_count_tlv->header.len =
2305 cpu_to_le16(sizeof(repeat_count_tlv->repeat_count));
2306 repeat_count_tlv->repeat_count =
2307 cpu_to_le16(bgscan_cfg_in->repeat_count);
2308
2309 tlv_pos += sizeof(repeat_count_tlv->header) +
2310 le16_to_cpu(repeat_count_tlv->header.len);
2311 }
2312
2313 if (bgscan_cfg_in->rssi_threshold) {
2314 rssi_threshold_tlv =
2315 (struct mwifiex_ie_types_min_rssi_threshold *)tlv_pos;
2316 rssi_threshold_tlv->header.type =
2317 cpu_to_le16(TLV_TYPE_RSSI_LOW);
2318 rssi_threshold_tlv->header.len =
2319 cpu_to_le16(sizeof(rssi_threshold_tlv->rssi_threshold));
2320 rssi_threshold_tlv->rssi_threshold =
2321 cpu_to_le16(bgscan_cfg_in->rssi_threshold);
2322
2323 tlv_pos += sizeof(rssi_threshold_tlv->header) +
2324 le16_to_cpu(rssi_threshold_tlv->header.len);
2325 }
2326
2327 for (i = 0; i < bgscan_cfg_in->num_ssids; i++) {
2328 ssid_len = bgscan_cfg_in->ssid_list[i].ssid.ssid_len;
2329
2330 wildcard_ssid_tlv =
2331 (struct mwifiex_ie_types_wildcard_ssid_params *)tlv_pos;
2332 wildcard_ssid_tlv->header.type =
2333 cpu_to_le16(TLV_TYPE_WILDCARDSSID);
2334 wildcard_ssid_tlv->header.len = cpu_to_le16(
2335 (u16)(ssid_len + sizeof(wildcard_ssid_tlv->
2336 max_ssid_length)));
2337
2338 /* max_ssid_length = 0 tells firmware to perform
2339 * specific scan for the SSID filled, whereas
2340 * max_ssid_length = IEEE80211_MAX_SSID_LEN is for
2341 * wildcard scan.
2342 */
2343 if (ssid_len)
2344 wildcard_ssid_tlv->max_ssid_length = 0;
2345 else
2346 wildcard_ssid_tlv->max_ssid_length =
2347 IEEE80211_MAX_SSID_LEN;
2348
2349 memcpy(wildcard_ssid_tlv->ssid,
2350 bgscan_cfg_in->ssid_list[i].ssid.ssid, ssid_len);
2351
2352 tlv_pos += (sizeof(wildcard_ssid_tlv->header)
2353 + le16_to_cpu(wildcard_ssid_tlv->header.len));
2354 }
2355
2356 chan_list_tlv = (struct mwifiex_ie_types_chan_list_param_set *)tlv_pos;
2357
2358 if (bgscan_cfg_in->chan_list[0].chan_number) {
2359 dev_dbg(priv->adapter->dev, "info: bgscan: Using supplied channel list\n");
2360
2361 chan_list_tlv->header.type = cpu_to_le16(TLV_TYPE_CHANLIST);
2362
2363 for (chan_idx = 0;
2364 chan_idx < MWIFIEX_BG_SCAN_CHAN_MAX &&
2365 bgscan_cfg_in->chan_list[chan_idx].chan_number;
2366 chan_idx++) {
2367 temp_chan = chan_list_tlv->chan_scan_param + chan_idx;
2368
2369 /* Increment the TLV header length by size appended */
2370 le16_add_cpu(&chan_list_tlv->header.len,
2371 sizeof(chan_list_tlv->chan_scan_param));
2372
2373 temp_chan->chan_number =
2374 bgscan_cfg_in->chan_list[chan_idx].chan_number;
2375 temp_chan->radio_type =
2376 bgscan_cfg_in->chan_list[chan_idx].radio_type;
2377
2378 scan_type =
2379 bgscan_cfg_in->chan_list[chan_idx].scan_type;
2380
2381 if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE)
2382 temp_chan->chan_scan_mode_bitmap
2383 |= MWIFIEX_PASSIVE_SCAN;
2384 else
2385 temp_chan->chan_scan_mode_bitmap
2386 &= ~MWIFIEX_PASSIVE_SCAN;
2387
2388 if (bgscan_cfg_in->chan_list[chan_idx].scan_time) {
2389 scan_dur = (u16)bgscan_cfg_in->
2390 chan_list[chan_idx].scan_time;
2391 } else {
2392 scan_dur = (scan_type ==
2393 MWIFIEX_SCAN_TYPE_PASSIVE) ?
2394 priv->adapter->passive_scan_time :
2395 priv->adapter->specific_scan_time;
2396 }
2397
2398 temp_chan->min_scan_time = cpu_to_le16(scan_dur);
2399 temp_chan->max_scan_time = cpu_to_le16(scan_dur);
2400 }
2401 } else {
2402 dev_dbg(priv->adapter->dev,
2403 "info: bgscan: Creating full region channel list\n");
2404 chan_num =
2405 mwifiex_bgscan_create_channel_list(priv, bgscan_cfg_in,
2406 chan_list_tlv->
2407 chan_scan_param);
2408 le16_add_cpu(&chan_list_tlv->header.len,
2409 chan_num *
2410 sizeof(chan_list_tlv->chan_scan_param[0]));
2411 }
2412
2413 tlv_pos += (sizeof(chan_list_tlv->header)
2414 + le16_to_cpu(chan_list_tlv->header.len));
2415
2416 if (bgscan_cfg_in->start_later) {
2417 start_later_tlv =
2418 (struct mwifiex_ie_types_bgscan_start_later *)tlv_pos;
2419 start_later_tlv->header.type =
2420 cpu_to_le16(TLV_TYPE_BGSCAN_START_LATER);
2421 start_later_tlv->header.len =
2422 cpu_to_le16(sizeof(start_later_tlv->start_later));
2423 start_later_tlv->start_later =
2424 cpu_to_le16(bgscan_cfg_in->start_later);
2425
2426 tlv_pos += sizeof(start_later_tlv->header) +
2427 le16_to_cpu(start_later_tlv->header.len);
2428 }
2429
2430 /* Append vendor specific IE TLV */
2431 mwifiex_cmd_append_vsie_tlv(priv, MWIFIEX_VSIE_MASK_BGSCAN, &tlv_pos);
2432
2433 le16_add_cpu(&cmd->size, tlv_pos - bgscan_config->tlv);
2434
2435 return 0;
2436 }
2437
2438 int mwifiex_stop_bg_scan(struct mwifiex_private *priv)
2439 {
2440 struct mwifiex_bg_scan_cfg *bgscan_cfg;
2441
2442 if (!priv->sched_scanning) {
2443 dev_dbg(priv->adapter->dev, "bgscan already stopped!\n");
2444 return 0;
2445 }
2446
2447 bgscan_cfg = kzalloc(sizeof(*bgscan_cfg), GFP_KERNEL);
2448 if (!bgscan_cfg)
2449 return -ENOMEM;
2450
2451 bgscan_cfg->bss_type = MWIFIEX_BSS_MODE_INFRA;
2452 bgscan_cfg->action = MWIFIEX_BGSCAN_ACT_SET;
2453 bgscan_cfg->enable = false;
2454
2455 if (mwifiex_send_cmd(priv, HostCmd_CMD_802_11_BG_SCAN_CONFIG,
2456 HostCmd_ACT_GEN_SET, 0, bgscan_cfg, true)) {
2457 kfree(bgscan_cfg);
2458 return -EFAULT;
2459 }
2460
2461 kfree(bgscan_cfg);
2462 priv->sched_scanning = false;
2463
2464 return 0;
2465 }
2466
2467 static void
2468 mwifiex_update_chan_statistics(struct mwifiex_private *priv,
2469 struct mwifiex_ietypes_chanstats *tlv_stat)
2470 {
2471 struct mwifiex_adapter *adapter = priv->adapter;
2472 u8 i, num_chan;
2473 struct mwifiex_fw_chan_stats *fw_chan_stats;
2474 struct mwifiex_chan_stats chan_stats;
2475
2476 fw_chan_stats = (void *)((u8 *)tlv_stat +
2477 sizeof(struct mwifiex_ie_types_header));
2478 num_chan = le16_to_cpu(tlv_stat->header.len) /
2479 sizeof(struct mwifiex_chan_stats);
2480
2481 for (i = 0 ; i < num_chan; i++) {
2482 chan_stats.chan_num = fw_chan_stats->chan_num;
2483 chan_stats.bandcfg = fw_chan_stats->bandcfg;
2484 chan_stats.flags = fw_chan_stats->flags;
2485 chan_stats.noise = fw_chan_stats->noise;
2486 chan_stats.total_bss = le16_to_cpu(fw_chan_stats->total_bss);
2487 chan_stats.cca_scan_dur =
2488 le16_to_cpu(fw_chan_stats->cca_scan_dur);
2489 chan_stats.cca_busy_dur =
2490 le16_to_cpu(fw_chan_stats->cca_busy_dur);
2491 mwifiex_dbg(adapter, INFO,
2492 "chan=%d, noise=%d, total_network=%d scan_duration=%d, busy_duration=%d\n",
2493 chan_stats.chan_num,
2494 chan_stats.noise,
2495 chan_stats.total_bss,
2496 chan_stats.cca_scan_dur,
2497 chan_stats.cca_busy_dur);
2498 memcpy(&adapter->chan_stats[adapter->survey_idx++], &chan_stats,
2499 sizeof(struct mwifiex_chan_stats));
2500 fw_chan_stats++;
2501 }
2502 }
2503
2504 /* This function handles the command response of extended scan */
2505 int mwifiex_ret_802_11_scan_ext(struct mwifiex_private *priv,
2506 struct host_cmd_ds_command *resp)
2507 {
2508 struct mwifiex_adapter *adapter = priv->adapter;
2509 struct host_cmd_ds_802_11_scan_ext *ext_scan_resp;
2510 struct mwifiex_ie_types_header *tlv;
2511 struct mwifiex_ietypes_chanstats *tlv_stat;
2512 u16 buf_left, type, len;
2513
2514 struct host_cmd_ds_command *cmd_ptr;
2515 struct cmd_ctrl_node *cmd_node;
2516 unsigned long cmd_flags, scan_flags;
2517 bool complete_scan = false;
2518
2519 mwifiex_dbg(adapter, INFO, "info: EXT scan returns successfully\n");
2520
2521 ext_scan_resp = &resp->params.ext_scan;
2522
2523 tlv = (void *)ext_scan_resp->tlv_buffer;
2524 buf_left = le16_to_cpu(resp->size) - (sizeof(*ext_scan_resp) + S_DS_GEN
2525 - 1);
2526
2527 while (buf_left >= sizeof(struct mwifiex_ie_types_header)) {
2528 type = le16_to_cpu(tlv->type);
2529 len = le16_to_cpu(tlv->len);
2530
2531 if (buf_left < (sizeof(struct mwifiex_ie_types_header) + len)) {
2532 mwifiex_dbg(adapter, ERROR,
2533 "error processing scan response TLVs");
2534 break;
2535 }
2536
2537 switch (type) {
2538 case TLV_TYPE_CHANNEL_STATS:
2539 tlv_stat = (void *)tlv;
2540 mwifiex_update_chan_statistics(priv, tlv_stat);
2541 break;
2542 default:
2543 break;
2544 }
2545
2546 buf_left -= len + sizeof(struct mwifiex_ie_types_header);
2547 tlv = (void *)((u8 *)tlv + len +
2548 sizeof(struct mwifiex_ie_types_header));
2549 }
2550
2551 spin_lock_irqsave(&adapter->cmd_pending_q_lock, cmd_flags);
2552 spin_lock_irqsave(&adapter->scan_pending_q_lock, scan_flags);
2553 if (list_empty(&adapter->scan_pending_q)) {
2554 complete_scan = true;
2555 list_for_each_entry(cmd_node, &adapter->cmd_pending_q, list) {
2556 cmd_ptr = (void *)cmd_node->cmd_skb->data;
2557 if (le16_to_cpu(cmd_ptr->command) ==
2558 HostCmd_CMD_802_11_SCAN_EXT) {
2559 mwifiex_dbg(adapter, INFO,
2560 "Scan pending in command pending list");
2561 complete_scan = false;
2562 break;
2563 }
2564 }
2565 }
2566 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, scan_flags);
2567 spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, cmd_flags);
2568
2569 if (complete_scan)
2570 mwifiex_complete_scan(priv);
2571
2572 return 0;
2573 }
2574
2575 /* This function This function handles the event extended scan report. It
2576 * parses extended scan results and informs to cfg80211 stack.
2577 */
2578 int mwifiex_handle_event_ext_scan_report(struct mwifiex_private *priv,
2579 void *buf)
2580 {
2581 int ret = 0;
2582 struct mwifiex_adapter *adapter = priv->adapter;
2583 u8 *bss_info;
2584 u32 bytes_left, bytes_left_for_tlv, idx;
2585 u16 type, len;
2586 struct mwifiex_ie_types_data *tlv;
2587 struct mwifiex_ie_types_bss_scan_rsp *scan_rsp_tlv;
2588 struct mwifiex_ie_types_bss_scan_info *scan_info_tlv;
2589 u8 *radio_type;
2590 u64 fw_tsf = 0;
2591 s32 rssi = 0;
2592 struct mwifiex_event_scan_result *event_scan = buf;
2593 u8 num_of_set = event_scan->num_of_set;
2594 u8 *scan_resp = buf + sizeof(struct mwifiex_event_scan_result);
2595 u16 scan_resp_size = le16_to_cpu(event_scan->buf_size);
2596
2597 if (num_of_set > MWIFIEX_MAX_AP) {
2598 mwifiex_dbg(adapter, ERROR,
2599 "EXT_SCAN: Invalid number of AP returned (%d)!!\n",
2600 num_of_set);
2601 ret = -1;
2602 goto check_next_scan;
2603 }
2604
2605 bytes_left = scan_resp_size;
2606 mwifiex_dbg(adapter, INFO,
2607 "EXT_SCAN: size %d, returned %d APs...",
2608 scan_resp_size, num_of_set);
2609 mwifiex_dbg_dump(adapter, CMD_D, "EXT_SCAN buffer:", buf,
2610 scan_resp_size +
2611 sizeof(struct mwifiex_event_scan_result));
2612
2613 tlv = (struct mwifiex_ie_types_data *)scan_resp;
2614
2615 for (idx = 0; idx < num_of_set && bytes_left; idx++) {
2616 type = le16_to_cpu(tlv->header.type);
2617 len = le16_to_cpu(tlv->header.len);
2618 if (bytes_left < sizeof(struct mwifiex_ie_types_header) + len) {
2619 mwifiex_dbg(adapter, ERROR,
2620 "EXT_SCAN: Error bytes left < TLV length\n");
2621 break;
2622 }
2623 scan_rsp_tlv = NULL;
2624 scan_info_tlv = NULL;
2625 bytes_left_for_tlv = bytes_left;
2626
2627 /* BSS response TLV with beacon or probe response buffer
2628 * at the initial position of each descriptor
2629 */
2630 if (type != TLV_TYPE_BSS_SCAN_RSP)
2631 break;
2632
2633 bss_info = (u8 *)tlv;
2634 scan_rsp_tlv = (struct mwifiex_ie_types_bss_scan_rsp *)tlv;
2635 tlv = (struct mwifiex_ie_types_data *)(tlv->data + len);
2636 bytes_left_for_tlv -=
2637 (len + sizeof(struct mwifiex_ie_types_header));
2638
2639 while (bytes_left_for_tlv >=
2640 sizeof(struct mwifiex_ie_types_header) &&
2641 le16_to_cpu(tlv->header.type) != TLV_TYPE_BSS_SCAN_RSP) {
2642 type = le16_to_cpu(tlv->header.type);
2643 len = le16_to_cpu(tlv->header.len);
2644 if (bytes_left_for_tlv <
2645 sizeof(struct mwifiex_ie_types_header) + len) {
2646 mwifiex_dbg(adapter, ERROR,
2647 "EXT_SCAN: Error in processing TLV,\t"
2648 "bytes left < TLV length\n");
2649 scan_rsp_tlv = NULL;
2650 bytes_left_for_tlv = 0;
2651 continue;
2652 }
2653 switch (type) {
2654 case TLV_TYPE_BSS_SCAN_INFO:
2655 scan_info_tlv =
2656 (struct mwifiex_ie_types_bss_scan_info *)tlv;
2657 if (len !=
2658 sizeof(struct mwifiex_ie_types_bss_scan_info) -
2659 sizeof(struct mwifiex_ie_types_header)) {
2660 bytes_left_for_tlv = 0;
2661 continue;
2662 }
2663 break;
2664 default:
2665 break;
2666 }
2667 tlv = (struct mwifiex_ie_types_data *)(tlv->data + len);
2668 bytes_left -=
2669 (len + sizeof(struct mwifiex_ie_types_header));
2670 bytes_left_for_tlv -=
2671 (len + sizeof(struct mwifiex_ie_types_header));
2672 }
2673
2674 if (!scan_rsp_tlv)
2675 break;
2676
2677 /* Advance pointer to the beacon buffer length and
2678 * update the bytes count so that the function
2679 * wlan_interpret_bss_desc_with_ie() can handle the
2680 * scan buffer withut any change
2681 */
2682 bss_info += sizeof(u16);
2683 bytes_left -= sizeof(u16);
2684
2685 if (scan_info_tlv) {
2686 rssi = (s32)(s16)(le16_to_cpu(scan_info_tlv->rssi));
2687 rssi *= 100; /* Convert dBm to mBm */
2688 mwifiex_dbg(adapter, INFO,
2689 "info: InterpretIE: RSSI=%d\n", rssi);
2690 fw_tsf = le64_to_cpu(scan_info_tlv->tsf);
2691 radio_type = &scan_info_tlv->radio_type;
2692 } else {
2693 radio_type = NULL;
2694 }
2695 ret = mwifiex_parse_single_response_buf(priv, &bss_info,
2696 &bytes_left, fw_tsf,
2697 radio_type, true, rssi);
2698 if (ret)
2699 goto check_next_scan;
2700 }
2701
2702 check_next_scan:
2703 if (!event_scan->more_event)
2704 mwifiex_check_next_scan_command(priv);
2705
2706 return ret;
2707 }
2708
2709 /*
2710 * This function prepares command for background scan query.
2711 *
2712 * Preparation includes -
2713 * - Setting command ID and proper size
2714 * - Setting background scan flush parameter
2715 * - Ensuring correct endian-ness
2716 */
2717 int mwifiex_cmd_802_11_bg_scan_query(struct host_cmd_ds_command *cmd)
2718 {
2719 struct host_cmd_ds_802_11_bg_scan_query *bg_query =
2720 &cmd->params.bg_scan_query;
2721
2722 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_BG_SCAN_QUERY);
2723 cmd->size = cpu_to_le16(sizeof(struct host_cmd_ds_802_11_bg_scan_query)
2724 + S_DS_GEN);
2725
2726 bg_query->flush = 1;
2727
2728 return 0;
2729 }
2730
2731 /*
2732 * This function inserts scan command node to the scan pending queue.
2733 */
2734 void
2735 mwifiex_queue_scan_cmd(struct mwifiex_private *priv,
2736 struct cmd_ctrl_node *cmd_node)
2737 {
2738 struct mwifiex_adapter *adapter = priv->adapter;
2739 unsigned long flags;
2740
2741 cmd_node->wait_q_enabled = true;
2742 cmd_node->condition = &adapter->scan_wait_q_woken;
2743 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
2744 list_add_tail(&cmd_node->list, &adapter->scan_pending_q);
2745 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
2746 }
2747
2748 /*
2749 * This function sends a scan command for all available channels to the
2750 * firmware, filtered on a specific SSID.
2751 */
2752 static int mwifiex_scan_specific_ssid(struct mwifiex_private *priv,
2753 struct cfg80211_ssid *req_ssid)
2754 {
2755 struct mwifiex_adapter *adapter = priv->adapter;
2756 int ret;
2757 struct mwifiex_user_scan_cfg *scan_cfg;
2758
2759 if (adapter->scan_processing) {
2760 mwifiex_dbg(adapter, WARN,
2761 "cmd: Scan already in process...\n");
2762 return -EBUSY;
2763 }
2764
2765 if (priv->scan_block) {
2766 mwifiex_dbg(adapter, WARN,
2767 "cmd: Scan is blocked during association...\n");
2768 return -EBUSY;
2769 }
2770
2771 scan_cfg = kzalloc(sizeof(struct mwifiex_user_scan_cfg), GFP_KERNEL);
2772 if (!scan_cfg)
2773 return -ENOMEM;
2774
2775 ether_addr_copy(scan_cfg->random_mac, priv->random_mac);
2776 scan_cfg->ssid_list = req_ssid;
2777 scan_cfg->num_ssids = 1;
2778
2779 ret = mwifiex_scan_networks(priv, scan_cfg);
2780
2781 kfree(scan_cfg);
2782 return ret;
2783 }
2784
2785 /*
2786 * Sends IOCTL request to start a scan.
2787 *
2788 * This function allocates the IOCTL request buffer, fills it
2789 * with requisite parameters and calls the IOCTL handler.
2790 *
2791 * Scan command can be issued for both normal scan and specific SSID
2792 * scan, depending upon whether an SSID is provided or not.
2793 */
2794 int mwifiex_request_scan(struct mwifiex_private *priv,
2795 struct cfg80211_ssid *req_ssid)
2796 {
2797 int ret;
2798
2799 if (down_interruptible(&priv->async_sem)) {
2800 mwifiex_dbg(priv->adapter, ERROR,
2801 "%s: acquire semaphore fail\n",
2802 __func__);
2803 return -1;
2804 }
2805
2806 priv->adapter->scan_wait_q_woken = false;
2807
2808 if (req_ssid && req_ssid->ssid_len != 0)
2809 /* Specific SSID scan */
2810 ret = mwifiex_scan_specific_ssid(priv, req_ssid);
2811 else
2812 /* Normal scan */
2813 ret = mwifiex_scan_networks(priv, NULL);
2814
2815 up(&priv->async_sem);
2816
2817 return ret;
2818 }
2819
2820 /*
2821 * This function appends the vendor specific IE TLV to a buffer.
2822 */
2823 int
2824 mwifiex_cmd_append_vsie_tlv(struct mwifiex_private *priv,
2825 u16 vsie_mask, u8 **buffer)
2826 {
2827 int id, ret_len = 0;
2828 struct mwifiex_ie_types_vendor_param_set *vs_param_set;
2829
2830 if (!buffer)
2831 return 0;
2832 if (!(*buffer))
2833 return 0;
2834
2835 /*
2836 * Traverse through the saved vendor specific IE array and append
2837 * the selected(scan/assoc/adhoc) IE as TLV to the command
2838 */
2839 for (id = 0; id < MWIFIEX_MAX_VSIE_NUM; id++) {
2840 if (priv->vs_ie[id].mask & vsie_mask) {
2841 vs_param_set =
2842 (struct mwifiex_ie_types_vendor_param_set *)
2843 *buffer;
2844 vs_param_set->header.type =
2845 cpu_to_le16(TLV_TYPE_PASSTHROUGH);
2846 vs_param_set->header.len =
2847 cpu_to_le16((((u16) priv->vs_ie[id].ie[1])
2848 & 0x00FF) + 2);
2849 memcpy(vs_param_set->ie, priv->vs_ie[id].ie,
2850 le16_to_cpu(vs_param_set->header.len));
2851 *buffer += le16_to_cpu(vs_param_set->header.len) +
2852 sizeof(struct mwifiex_ie_types_header);
2853 ret_len += le16_to_cpu(vs_param_set->header.len) +
2854 sizeof(struct mwifiex_ie_types_header);
2855 }
2856 }
2857 return ret_len;
2858 }
2859
2860 /*
2861 * This function saves a beacon buffer of the current BSS descriptor.
2862 *
2863 * The current beacon buffer is saved so that it can be restored in the
2864 * following cases that makes the beacon buffer not to contain the current
2865 * ssid's beacon buffer.
2866 * - The current ssid was not found somehow in the last scan.
2867 * - The current ssid was the last entry of the scan table and overloaded.
2868 */
2869 void
2870 mwifiex_save_curr_bcn(struct mwifiex_private *priv)
2871 {
2872 struct mwifiex_bssdescriptor *curr_bss =
2873 &priv->curr_bss_params.bss_descriptor;
2874
2875 if (!curr_bss->beacon_buf_size)
2876 return;
2877
2878 /* allocate beacon buffer at 1st time; or if it's size has changed */
2879 if (!priv->curr_bcn_buf ||
2880 priv->curr_bcn_size != curr_bss->beacon_buf_size) {
2881 priv->curr_bcn_size = curr_bss->beacon_buf_size;
2882
2883 kfree(priv->curr_bcn_buf);
2884 priv->curr_bcn_buf = kmalloc(curr_bss->beacon_buf_size,
2885 GFP_ATOMIC);
2886 if (!priv->curr_bcn_buf)
2887 return;
2888 }
2889
2890 memcpy(priv->curr_bcn_buf, curr_bss->beacon_buf,
2891 curr_bss->beacon_buf_size);
2892 mwifiex_dbg(priv->adapter, INFO,
2893 "info: current beacon saved %d\n",
2894 priv->curr_bcn_size);
2895
2896 curr_bss->beacon_buf = priv->curr_bcn_buf;
2897
2898 /* adjust the pointers in the current BSS descriptor */
2899 if (curr_bss->bcn_wpa_ie)
2900 curr_bss->bcn_wpa_ie =
2901 (struct ieee_types_vendor_specific *)
2902 (curr_bss->beacon_buf +
2903 curr_bss->wpa_offset);
2904
2905 if (curr_bss->bcn_rsn_ie)
2906 curr_bss->bcn_rsn_ie = (struct ieee_types_generic *)
2907 (curr_bss->beacon_buf +
2908 curr_bss->rsn_offset);
2909
2910 if (curr_bss->bcn_ht_cap)
2911 curr_bss->bcn_ht_cap = (struct ieee80211_ht_cap *)
2912 (curr_bss->beacon_buf +
2913 curr_bss->ht_cap_offset);
2914
2915 if (curr_bss->bcn_ht_oper)
2916 curr_bss->bcn_ht_oper = (struct ieee80211_ht_operation *)
2917 (curr_bss->beacon_buf +
2918 curr_bss->ht_info_offset);
2919
2920 if (curr_bss->bcn_vht_cap)
2921 curr_bss->bcn_vht_cap = (void *)(curr_bss->beacon_buf +
2922 curr_bss->vht_cap_offset);
2923
2924 if (curr_bss->bcn_vht_oper)
2925 curr_bss->bcn_vht_oper = (void *)(curr_bss->beacon_buf +
2926 curr_bss->vht_info_offset);
2927
2928 if (curr_bss->bcn_bss_co_2040)
2929 curr_bss->bcn_bss_co_2040 =
2930 (curr_bss->beacon_buf + curr_bss->bss_co_2040_offset);
2931
2932 if (curr_bss->bcn_ext_cap)
2933 curr_bss->bcn_ext_cap = curr_bss->beacon_buf +
2934 curr_bss->ext_cap_offset;
2935
2936 if (curr_bss->oper_mode)
2937 curr_bss->oper_mode = (void *)(curr_bss->beacon_buf +
2938 curr_bss->oper_mode_offset);
2939 }
2940
2941 /*
2942 * This function frees the current BSS descriptor beacon buffer.
2943 */
2944 void
2945 mwifiex_free_curr_bcn(struct mwifiex_private *priv)
2946 {
2947 kfree(priv->curr_bcn_buf);
2948 priv->curr_bcn_buf = NULL;
2949 }
Linux kernel - Deliverables
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