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Merge tag 'v3.11' into next
[deliverable/linux.git] / drivers / net / wireless / mwifiex / scan.c
1 /*
2 * Marvell Wireless LAN device driver: scan ioctl and command handling
3 *
4 * Copyright (C) 2011, Marvell International Ltd.
5 *
6 * This software file (the "File") is distributed by Marvell International
7 * Ltd. under the terms of the GNU General Public License Version 2, June 1991
8 * (the "License"). You may use, redistribute and/or modify this File in
9 * accordance with the terms and conditions of the License, a copy of which
10 * is available by writing to the Free Software Foundation, Inc.,
11 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
12 * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
13 *
14 * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
16 * ARE EXPRESSLY DISCLAIMED. The License provides additional details about
17 * this warranty disclaimer.
18 */
19
20 #include "decl.h"
21 #include "ioctl.h"
22 #include "util.h"
23 #include "fw.h"
24 #include "main.h"
25 #include "11n.h"
26 #include "cfg80211.h"
27
28 /* The maximum number of channels the firmware can scan per command */
29 #define MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN 14
30
31 #define MWIFIEX_DEF_CHANNELS_PER_SCAN_CMD 4
32 #define MWIFIEX_LIMIT_1_CHANNEL_PER_SCAN_CMD 15
33 #define MWIFIEX_LIMIT_2_CHANNELS_PER_SCAN_CMD 27
34 #define MWIFIEX_LIMIT_3_CHANNELS_PER_SCAN_CMD 35
35
36 /* Memory needed to store a max sized Channel List TLV for a firmware scan */
37 #define CHAN_TLV_MAX_SIZE (sizeof(struct mwifiex_ie_types_header) \
38 + (MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN \
39 *sizeof(struct mwifiex_chan_scan_param_set)))
40
41 /* Memory needed to store supported rate */
42 #define RATE_TLV_MAX_SIZE (sizeof(struct mwifiex_ie_types_rates_param_set) \
43 + HOSTCMD_SUPPORTED_RATES)
44
45 /* Memory needed to store a max number/size WildCard SSID TLV for a firmware
46 scan */
47 #define WILDCARD_SSID_TLV_MAX_SIZE \
48 (MWIFIEX_MAX_SSID_LIST_LENGTH * \
49 (sizeof(struct mwifiex_ie_types_wildcard_ssid_params) \
50 + IEEE80211_MAX_SSID_LEN))
51
52 /* Maximum memory needed for a mwifiex_scan_cmd_config with all TLVs at max */
53 #define MAX_SCAN_CFG_ALLOC (sizeof(struct mwifiex_scan_cmd_config) \
54 + sizeof(struct mwifiex_ie_types_num_probes) \
55 + sizeof(struct mwifiex_ie_types_htcap) \
56 + CHAN_TLV_MAX_SIZE \
57 + RATE_TLV_MAX_SIZE \
58 + WILDCARD_SSID_TLV_MAX_SIZE)
59
60
61 union mwifiex_scan_cmd_config_tlv {
62 /* Scan configuration (variable length) */
63 struct mwifiex_scan_cmd_config config;
64 /* Max allocated block */
65 u8 config_alloc_buf[MAX_SCAN_CFG_ALLOC];
66 };
67
68 enum cipher_suite {
69 CIPHER_SUITE_TKIP,
70 CIPHER_SUITE_CCMP,
71 CIPHER_SUITE_MAX
72 };
73 static u8 mwifiex_wpa_oui[CIPHER_SUITE_MAX][4] = {
74 { 0x00, 0x50, 0xf2, 0x02 }, /* TKIP */
75 { 0x00, 0x50, 0xf2, 0x04 }, /* AES */
76 };
77 static u8 mwifiex_rsn_oui[CIPHER_SUITE_MAX][4] = {
78 { 0x00, 0x0f, 0xac, 0x02 }, /* TKIP */
79 { 0x00, 0x0f, 0xac, 0x04 }, /* AES */
80 };
81
82 /*
83 * This function parses a given IE for a given OUI.
84 *
85 * This is used to parse a WPA/RSN IE to find if it has
86 * a given oui in PTK.
87 */
88 static u8
89 mwifiex_search_oui_in_ie(struct ie_body *iebody, u8 *oui)
90 {
91 u8 count;
92
93 count = iebody->ptk_cnt[0];
94
95 /* There could be multiple OUIs for PTK hence
96 1) Take the length.
97 2) Check all the OUIs for AES.
98 3) If one of them is AES then pass success. */
99 while (count) {
100 if (!memcmp(iebody->ptk_body, oui, sizeof(iebody->ptk_body)))
101 return MWIFIEX_OUI_PRESENT;
102
103 --count;
104 if (count)
105 iebody = (struct ie_body *) ((u8 *) iebody +
106 sizeof(iebody->ptk_body));
107 }
108
109 pr_debug("info: %s: OUI is not found in PTK\n", __func__);
110 return MWIFIEX_OUI_NOT_PRESENT;
111 }
112
113 /*
114 * This function checks if a given OUI is present in a RSN IE.
115 *
116 * The function first checks if a RSN IE is present or not in the
117 * BSS descriptor. It tries to locate the OUI only if such an IE is
118 * present.
119 */
120 static u8
121 mwifiex_is_rsn_oui_present(struct mwifiex_bssdescriptor *bss_desc, u32 cipher)
122 {
123 u8 *oui;
124 struct ie_body *iebody;
125 u8 ret = MWIFIEX_OUI_NOT_PRESENT;
126
127 if (((bss_desc->bcn_rsn_ie) && ((*(bss_desc->bcn_rsn_ie)).
128 ieee_hdr.element_id == WLAN_EID_RSN))) {
129 iebody = (struct ie_body *)
130 (((u8 *) bss_desc->bcn_rsn_ie->data) +
131 RSN_GTK_OUI_OFFSET);
132 oui = &mwifiex_rsn_oui[cipher][0];
133 ret = mwifiex_search_oui_in_ie(iebody, oui);
134 if (ret)
135 return ret;
136 }
137 return ret;
138 }
139
140 /*
141 * This function checks if a given OUI is present in a WPA IE.
142 *
143 * The function first checks if a WPA IE is present or not in the
144 * BSS descriptor. It tries to locate the OUI only if such an IE is
145 * present.
146 */
147 static u8
148 mwifiex_is_wpa_oui_present(struct mwifiex_bssdescriptor *bss_desc, u32 cipher)
149 {
150 u8 *oui;
151 struct ie_body *iebody;
152 u8 ret = MWIFIEX_OUI_NOT_PRESENT;
153
154 if (((bss_desc->bcn_wpa_ie) &&
155 ((*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id ==
156 WLAN_EID_VENDOR_SPECIFIC))) {
157 iebody = (struct ie_body *) bss_desc->bcn_wpa_ie->data;
158 oui = &mwifiex_wpa_oui[cipher][0];
159 ret = mwifiex_search_oui_in_ie(iebody, oui);
160 if (ret)
161 return ret;
162 }
163 return ret;
164 }
165
166 /*
167 * This function compares two SSIDs and checks if they match.
168 */
169 s32
170 mwifiex_ssid_cmp(struct cfg80211_ssid *ssid1, struct cfg80211_ssid *ssid2)
171 {
172 if (!ssid1 || !ssid2 || (ssid1->ssid_len != ssid2->ssid_len))
173 return -1;
174 return memcmp(ssid1->ssid, ssid2->ssid, ssid1->ssid_len);
175 }
176
177 /*
178 * This function checks if wapi is enabled in driver and scanned network is
179 * compatible with it.
180 */
181 static bool
182 mwifiex_is_bss_wapi(struct mwifiex_private *priv,
183 struct mwifiex_bssdescriptor *bss_desc)
184 {
185 if (priv->sec_info.wapi_enabled &&
186 (bss_desc->bcn_wapi_ie &&
187 ((*(bss_desc->bcn_wapi_ie)).ieee_hdr.element_id ==
188 WLAN_EID_BSS_AC_ACCESS_DELAY))) {
189 return true;
190 }
191 return false;
192 }
193
194 /*
195 * This function checks if driver is configured with no security mode and
196 * scanned network is compatible with it.
197 */
198 static bool
199 mwifiex_is_bss_no_sec(struct mwifiex_private *priv,
200 struct mwifiex_bssdescriptor *bss_desc)
201 {
202 if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
203 !priv->sec_info.wpa2_enabled && ((!bss_desc->bcn_wpa_ie) ||
204 ((*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id !=
205 WLAN_EID_VENDOR_SPECIFIC)) &&
206 ((!bss_desc->bcn_rsn_ie) ||
207 ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id !=
208 WLAN_EID_RSN)) &&
209 !priv->sec_info.encryption_mode && !bss_desc->privacy) {
210 return true;
211 }
212 return false;
213 }
214
215 /*
216 * This function checks if static WEP is enabled in driver and scanned network
217 * is compatible with it.
218 */
219 static bool
220 mwifiex_is_bss_static_wep(struct mwifiex_private *priv,
221 struct mwifiex_bssdescriptor *bss_desc)
222 {
223 if (priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
224 !priv->sec_info.wpa2_enabled && bss_desc->privacy) {
225 return true;
226 }
227 return false;
228 }
229
230 /*
231 * This function checks if wpa is enabled in driver and scanned network is
232 * compatible with it.
233 */
234 static bool
235 mwifiex_is_bss_wpa(struct mwifiex_private *priv,
236 struct mwifiex_bssdescriptor *bss_desc)
237 {
238 if (!priv->sec_info.wep_enabled && priv->sec_info.wpa_enabled &&
239 !priv->sec_info.wpa2_enabled && ((bss_desc->bcn_wpa_ie) &&
240 ((*(bss_desc->bcn_wpa_ie)).
241 vend_hdr.element_id == WLAN_EID_VENDOR_SPECIFIC))
242 /*
243 * Privacy bit may NOT be set in some APs like
244 * LinkSys WRT54G && bss_desc->privacy
245 */
246 ) {
247 dev_dbg(priv->adapter->dev, "info: %s: WPA:"
248 " wpa_ie=%#x wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s "
249 "EncMode=%#x privacy=%#x\n", __func__,
250 (bss_desc->bcn_wpa_ie) ?
251 (*(bss_desc->bcn_wpa_ie)).
252 vend_hdr.element_id : 0,
253 (bss_desc->bcn_rsn_ie) ?
254 (*(bss_desc->bcn_rsn_ie)).
255 ieee_hdr.element_id : 0,
256 (priv->sec_info.wep_enabled) ? "e" : "d",
257 (priv->sec_info.wpa_enabled) ? "e" : "d",
258 (priv->sec_info.wpa2_enabled) ? "e" : "d",
259 priv->sec_info.encryption_mode,
260 bss_desc->privacy);
261 return true;
262 }
263 return false;
264 }
265
266 /*
267 * This function checks if wpa2 is enabled in driver and scanned network is
268 * compatible with it.
269 */
270 static bool
271 mwifiex_is_bss_wpa2(struct mwifiex_private *priv,
272 struct mwifiex_bssdescriptor *bss_desc)
273 {
274 if (!priv->sec_info.wep_enabled &&
275 !priv->sec_info.wpa_enabled &&
276 priv->sec_info.wpa2_enabled &&
277 ((bss_desc->bcn_rsn_ie) &&
278 ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id == WLAN_EID_RSN))) {
279 /*
280 * Privacy bit may NOT be set in some APs like
281 * LinkSys WRT54G && bss_desc->privacy
282 */
283 dev_dbg(priv->adapter->dev, "info: %s: WPA2: "
284 " wpa_ie=%#x wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s "
285 "EncMode=%#x privacy=%#x\n", __func__,
286 (bss_desc->bcn_wpa_ie) ?
287 (*(bss_desc->bcn_wpa_ie)).
288 vend_hdr.element_id : 0,
289 (bss_desc->bcn_rsn_ie) ?
290 (*(bss_desc->bcn_rsn_ie)).
291 ieee_hdr.element_id : 0,
292 (priv->sec_info.wep_enabled) ? "e" : "d",
293 (priv->sec_info.wpa_enabled) ? "e" : "d",
294 (priv->sec_info.wpa2_enabled) ? "e" : "d",
295 priv->sec_info.encryption_mode,
296 bss_desc->privacy);
297 return true;
298 }
299 return false;
300 }
301
302 /*
303 * This function checks if adhoc AES is enabled in driver and scanned network is
304 * compatible with it.
305 */
306 static bool
307 mwifiex_is_bss_adhoc_aes(struct mwifiex_private *priv,
308 struct mwifiex_bssdescriptor *bss_desc)
309 {
310 if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
311 !priv->sec_info.wpa2_enabled &&
312 ((!bss_desc->bcn_wpa_ie) ||
313 ((*(bss_desc->bcn_wpa_ie)).
314 vend_hdr.element_id != WLAN_EID_VENDOR_SPECIFIC)) &&
315 ((!bss_desc->bcn_rsn_ie) ||
316 ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id != WLAN_EID_RSN)) &&
317 !priv->sec_info.encryption_mode && bss_desc->privacy) {
318 return true;
319 }
320 return false;
321 }
322
323 /*
324 * This function checks if dynamic WEP is enabled in driver and scanned network
325 * is compatible with it.
326 */
327 static bool
328 mwifiex_is_bss_dynamic_wep(struct mwifiex_private *priv,
329 struct mwifiex_bssdescriptor *bss_desc)
330 {
331 if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
332 !priv->sec_info.wpa2_enabled &&
333 ((!bss_desc->bcn_wpa_ie) ||
334 ((*(bss_desc->bcn_wpa_ie)).
335 vend_hdr.element_id != WLAN_EID_VENDOR_SPECIFIC)) &&
336 ((!bss_desc->bcn_rsn_ie) ||
337 ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id != WLAN_EID_RSN)) &&
338 priv->sec_info.encryption_mode && bss_desc->privacy) {
339 dev_dbg(priv->adapter->dev, "info: %s: dynamic "
340 "WEP: wpa_ie=%#x wpa2_ie=%#x "
341 "EncMode=%#x privacy=%#x\n",
342 __func__,
343 (bss_desc->bcn_wpa_ie) ?
344 (*(bss_desc->bcn_wpa_ie)).
345 vend_hdr.element_id : 0,
346 (bss_desc->bcn_rsn_ie) ?
347 (*(bss_desc->bcn_rsn_ie)).
348 ieee_hdr.element_id : 0,
349 priv->sec_info.encryption_mode,
350 bss_desc->privacy);
351 return true;
352 }
353 return false;
354 }
355
356 /*
357 * This function checks if a scanned network is compatible with the driver
358 * settings.
359 *
360 * WEP WPA WPA2 ad-hoc encrypt Network
361 * enabled enabled enabled AES mode Privacy WPA WPA2 Compatible
362 * 0 0 0 0 NONE 0 0 0 yes No security
363 * 0 1 0 0 x 1x 1 x yes WPA (disable
364 * HT if no AES)
365 * 0 0 1 0 x 1x x 1 yes WPA2 (disable
366 * HT if no AES)
367 * 0 0 0 1 NONE 1 0 0 yes Ad-hoc AES
368 * 1 0 0 0 NONE 1 0 0 yes Static WEP
369 * (disable HT)
370 * 0 0 0 0 !=NONE 1 0 0 yes Dynamic WEP
371 *
372 * Compatibility is not matched while roaming, except for mode.
373 */
374 static s32
375 mwifiex_is_network_compatible(struct mwifiex_private *priv,
376 struct mwifiex_bssdescriptor *bss_desc, u32 mode)
377 {
378 struct mwifiex_adapter *adapter = priv->adapter;
379
380 bss_desc->disable_11n = false;
381
382 /* Don't check for compatibility if roaming */
383 if (priv->media_connected &&
384 (priv->bss_mode == NL80211_IFTYPE_STATION) &&
385 (bss_desc->bss_mode == NL80211_IFTYPE_STATION))
386 return 0;
387
388 if (priv->wps.session_enable) {
389 dev_dbg(adapter->dev,
390 "info: return success directly in WPS period\n");
391 return 0;
392 }
393
394 if (bss_desc->chan_sw_ie_present) {
395 dev_err(adapter->dev,
396 "Don't connect to AP with WLAN_EID_CHANNEL_SWITCH\n");
397 return -1;
398 }
399
400 if (mwifiex_is_bss_wapi(priv, bss_desc)) {
401 dev_dbg(adapter->dev, "info: return success for WAPI AP\n");
402 return 0;
403 }
404
405 if (bss_desc->bss_mode == mode) {
406 if (mwifiex_is_bss_no_sec(priv, bss_desc)) {
407 /* No security */
408 return 0;
409 } else if (mwifiex_is_bss_static_wep(priv, bss_desc)) {
410 /* Static WEP enabled */
411 dev_dbg(adapter->dev, "info: Disable 11n in WEP mode.\n");
412 bss_desc->disable_11n = true;
413 return 0;
414 } else if (mwifiex_is_bss_wpa(priv, bss_desc)) {
415 /* WPA enabled */
416 if (((priv->adapter->config_bands & BAND_GN ||
417 priv->adapter->config_bands & BAND_AN) &&
418 bss_desc->bcn_ht_cap) &&
419 !mwifiex_is_wpa_oui_present(bss_desc,
420 CIPHER_SUITE_CCMP)) {
421
422 if (mwifiex_is_wpa_oui_present
423 (bss_desc, CIPHER_SUITE_TKIP)) {
424 dev_dbg(adapter->dev,
425 "info: Disable 11n if AES "
426 "is not supported by AP\n");
427 bss_desc->disable_11n = true;
428 } else {
429 return -1;
430 }
431 }
432 return 0;
433 } else if (mwifiex_is_bss_wpa2(priv, bss_desc)) {
434 /* WPA2 enabled */
435 if (((priv->adapter->config_bands & BAND_GN ||
436 priv->adapter->config_bands & BAND_AN) &&
437 bss_desc->bcn_ht_cap) &&
438 !mwifiex_is_rsn_oui_present(bss_desc,
439 CIPHER_SUITE_CCMP)) {
440
441 if (mwifiex_is_rsn_oui_present
442 (bss_desc, CIPHER_SUITE_TKIP)) {
443 dev_dbg(adapter->dev,
444 "info: Disable 11n if AES "
445 "is not supported by AP\n");
446 bss_desc->disable_11n = true;
447 } else {
448 return -1;
449 }
450 }
451 return 0;
452 } else if (mwifiex_is_bss_adhoc_aes(priv, bss_desc)) {
453 /* Ad-hoc AES enabled */
454 return 0;
455 } else if (mwifiex_is_bss_dynamic_wep(priv, bss_desc)) {
456 /* Dynamic WEP enabled */
457 return 0;
458 }
459
460 /* Security doesn't match */
461 dev_dbg(adapter->dev,
462 "info: %s: failed: wpa_ie=%#x wpa2_ie=%#x WEP=%s "
463 "WPA=%s WPA2=%s EncMode=%#x privacy=%#x\n", __func__,
464 (bss_desc->bcn_wpa_ie) ?
465 (*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id : 0,
466 (bss_desc->bcn_rsn_ie) ?
467 (*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id : 0,
468 (priv->sec_info.wep_enabled) ? "e" : "d",
469 (priv->sec_info.wpa_enabled) ? "e" : "d",
470 (priv->sec_info.wpa2_enabled) ? "e" : "d",
471 priv->sec_info.encryption_mode, bss_desc->privacy);
472 return -1;
473 }
474
475 /* Mode doesn't match */
476 return -1;
477 }
478
479 /*
480 * This function creates a channel list for the driver to scan, based
481 * on region/band information.
482 *
483 * This routine is used for any scan that is not provided with a
484 * specific channel list to scan.
485 */
486 static int
487 mwifiex_scan_create_channel_list(struct mwifiex_private *priv,
488 const struct mwifiex_user_scan_cfg
489 *user_scan_in,
490 struct mwifiex_chan_scan_param_set
491 *scan_chan_list,
492 u8 filtered_scan)
493 {
494 enum ieee80211_band band;
495 struct ieee80211_supported_band *sband;
496 struct ieee80211_channel *ch;
497 struct mwifiex_adapter *adapter = priv->adapter;
498 int chan_idx = 0, i;
499
500 for (band = 0; (band < IEEE80211_NUM_BANDS) ; band++) {
501
502 if (!priv->wdev->wiphy->bands[band])
503 continue;
504
505 sband = priv->wdev->wiphy->bands[band];
506
507 for (i = 0; (i < sband->n_channels) ; i++) {
508 ch = &sband->channels[i];
509 if (ch->flags & IEEE80211_CHAN_DISABLED)
510 continue;
511 scan_chan_list[chan_idx].radio_type = band;
512
513 if (user_scan_in &&
514 user_scan_in->chan_list[0].scan_time)
515 scan_chan_list[chan_idx].max_scan_time =
516 cpu_to_le16((u16) user_scan_in->
517 chan_list[0].scan_time);
518 else if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
519 scan_chan_list[chan_idx].max_scan_time =
520 cpu_to_le16(adapter->passive_scan_time);
521 else
522 scan_chan_list[chan_idx].max_scan_time =
523 cpu_to_le16(adapter->active_scan_time);
524
525 if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
526 scan_chan_list[chan_idx].chan_scan_mode_bitmap
527 |= MWIFIEX_PASSIVE_SCAN;
528 else
529 scan_chan_list[chan_idx].chan_scan_mode_bitmap
530 &= ~MWIFIEX_PASSIVE_SCAN;
531 scan_chan_list[chan_idx].chan_number =
532 (u32) ch->hw_value;
533 if (filtered_scan) {
534 scan_chan_list[chan_idx].max_scan_time =
535 cpu_to_le16(adapter->specific_scan_time);
536 scan_chan_list[chan_idx].chan_scan_mode_bitmap
537 |= MWIFIEX_DISABLE_CHAN_FILT;
538 }
539 chan_idx++;
540 }
541
542 }
543 return chan_idx;
544 }
545
546 /*
547 * This function constructs and sends multiple scan config commands to
548 * the firmware.
549 *
550 * Previous routines in the code flow have created a scan command configuration
551 * with any requested TLVs. This function splits the channel TLV into maximum
552 * channels supported per scan lists and sends the portion of the channel TLV,
553 * along with the other TLVs, to the firmware.
554 */
555 static int
556 mwifiex_scan_channel_list(struct mwifiex_private *priv,
557 u32 max_chan_per_scan, u8 filtered_scan,
558 struct mwifiex_scan_cmd_config *scan_cfg_out,
559 struct mwifiex_ie_types_chan_list_param_set
560 *chan_tlv_out,
561 struct mwifiex_chan_scan_param_set *scan_chan_list)
562 {
563 int ret = 0;
564 struct mwifiex_chan_scan_param_set *tmp_chan_list;
565 struct mwifiex_chan_scan_param_set *start_chan;
566
567 u32 tlv_idx;
568 u32 total_scan_time;
569 u32 done_early;
570
571 if (!scan_cfg_out || !chan_tlv_out || !scan_chan_list) {
572 dev_dbg(priv->adapter->dev,
573 "info: Scan: Null detect: %p, %p, %p\n",
574 scan_cfg_out, chan_tlv_out, scan_chan_list);
575 return -1;
576 }
577
578 /* Check csa channel expiry before preparing scan list */
579 mwifiex_11h_get_csa_closed_channel(priv);
580
581 chan_tlv_out->header.type = cpu_to_le16(TLV_TYPE_CHANLIST);
582
583 /* Set the temp channel struct pointer to the start of the desired
584 list */
585 tmp_chan_list = scan_chan_list;
586
587 /* Loop through the desired channel list, sending a new firmware scan
588 commands for each max_chan_per_scan channels (or for 1,6,11
589 individually if configured accordingly) */
590 while (tmp_chan_list->chan_number) {
591
592 tlv_idx = 0;
593 total_scan_time = 0;
594 chan_tlv_out->header.len = 0;
595 start_chan = tmp_chan_list;
596 done_early = false;
597
598 /*
599 * Construct the Channel TLV for the scan command. Continue to
600 * insert channel TLVs until:
601 * - the tlv_idx hits the maximum configured per scan command
602 * - the next channel to insert is 0 (end of desired channel
603 * list)
604 * - done_early is set (controlling individual scanning of
605 * 1,6,11)
606 */
607 while (tlv_idx < max_chan_per_scan &&
608 tmp_chan_list->chan_number && !done_early) {
609
610 if (tmp_chan_list->chan_number == priv->csa_chan) {
611 tmp_chan_list++;
612 continue;
613 }
614
615 dev_dbg(priv->adapter->dev,
616 "info: Scan: Chan(%3d), Radio(%d),"
617 " Mode(%d, %d), Dur(%d)\n",
618 tmp_chan_list->chan_number,
619 tmp_chan_list->radio_type,
620 tmp_chan_list->chan_scan_mode_bitmap
621 & MWIFIEX_PASSIVE_SCAN,
622 (tmp_chan_list->chan_scan_mode_bitmap
623 & MWIFIEX_DISABLE_CHAN_FILT) >> 1,
624 le16_to_cpu(tmp_chan_list->max_scan_time));
625
626 /* Copy the current channel TLV to the command being
627 prepared */
628 memcpy(chan_tlv_out->chan_scan_param + tlv_idx,
629 tmp_chan_list,
630 sizeof(chan_tlv_out->chan_scan_param));
631
632 /* Increment the TLV header length by the size
633 appended */
634 le16_add_cpu(&chan_tlv_out->header.len,
635 sizeof(chan_tlv_out->chan_scan_param));
636
637 /*
638 * The tlv buffer length is set to the number of bytes
639 * of the between the channel tlv pointer and the start
640 * of the tlv buffer. This compensates for any TLVs
641 * that were appended before the channel list.
642 */
643 scan_cfg_out->tlv_buf_len = (u32) ((u8 *) chan_tlv_out -
644 scan_cfg_out->tlv_buf);
645
646 /* Add the size of the channel tlv header and the data
647 length */
648 scan_cfg_out->tlv_buf_len +=
649 (sizeof(chan_tlv_out->header)
650 + le16_to_cpu(chan_tlv_out->header.len));
651
652 /* Increment the index to the channel tlv we are
653 constructing */
654 tlv_idx++;
655
656 /* Count the total scan time per command */
657 total_scan_time +=
658 le16_to_cpu(tmp_chan_list->max_scan_time);
659
660 done_early = false;
661
662 /* Stop the loop if the *current* channel is in the
663 1,6,11 set and we are not filtering on a BSSID
664 or SSID. */
665 if (!filtered_scan &&
666 (tmp_chan_list->chan_number == 1 ||
667 tmp_chan_list->chan_number == 6 ||
668 tmp_chan_list->chan_number == 11))
669 done_early = true;
670
671 /* Increment the tmp pointer to the next channel to
672 be scanned */
673 tmp_chan_list++;
674
675 /* Stop the loop if the *next* channel is in the 1,6,11
676 set. This will cause it to be the only channel
677 scanned on the next interation */
678 if (!filtered_scan &&
679 (tmp_chan_list->chan_number == 1 ||
680 tmp_chan_list->chan_number == 6 ||
681 tmp_chan_list->chan_number == 11))
682 done_early = true;
683 }
684
685 /* The total scan time should be less than scan command timeout
686 value */
687 if (total_scan_time > MWIFIEX_MAX_TOTAL_SCAN_TIME) {
688 dev_err(priv->adapter->dev, "total scan time %dms"
689 " is over limit (%dms), scan skipped\n",
690 total_scan_time, MWIFIEX_MAX_TOTAL_SCAN_TIME);
691 ret = -1;
692 break;
693 }
694
695 priv->adapter->scan_channels = start_chan;
696
697 /* Send the scan command to the firmware with the specified
698 cfg */
699 ret = mwifiex_send_cmd_async(priv, HostCmd_CMD_802_11_SCAN,
700 HostCmd_ACT_GEN_SET, 0,
701 scan_cfg_out);
702 if (ret)
703 break;
704 }
705
706 if (ret)
707 return -1;
708
709 return 0;
710 }
711
712 /*
713 * This function constructs a scan command configuration structure to use
714 * in scan commands.
715 *
716 * Application layer or other functions can invoke network scanning
717 * with a scan configuration supplied in a user scan configuration structure.
718 * This structure is used as the basis of one or many scan command configuration
719 * commands that are sent to the command processing module and eventually to the
720 * firmware.
721 *
722 * This function creates a scan command configuration structure based on the
723 * following user supplied parameters (if present):
724 * - SSID filter
725 * - BSSID filter
726 * - Number of Probes to be sent
727 * - Channel list
728 *
729 * If the SSID or BSSID filter is not present, the filter is disabled/cleared.
730 * If the number of probes is not set, adapter default setting is used.
731 */
732 static void
733 mwifiex_config_scan(struct mwifiex_private *priv,
734 const struct mwifiex_user_scan_cfg *user_scan_in,
735 struct mwifiex_scan_cmd_config *scan_cfg_out,
736 struct mwifiex_ie_types_chan_list_param_set **chan_list_out,
737 struct mwifiex_chan_scan_param_set *scan_chan_list,
738 u8 *max_chan_per_scan, u8 *filtered_scan,
739 u8 *scan_current_only)
740 {
741 struct mwifiex_adapter *adapter = priv->adapter;
742 struct mwifiex_ie_types_num_probes *num_probes_tlv;
743 struct mwifiex_ie_types_wildcard_ssid_params *wildcard_ssid_tlv;
744 struct mwifiex_ie_types_rates_param_set *rates_tlv;
745 u8 *tlv_pos;
746 u32 num_probes;
747 u32 ssid_len;
748 u32 chan_idx;
749 u32 chan_num;
750 u32 scan_type;
751 u16 scan_dur;
752 u8 channel;
753 u8 radio_type;
754 int i;
755 u8 ssid_filter;
756 u8 rates[MWIFIEX_SUPPORTED_RATES];
757 u32 rates_size;
758 struct mwifiex_ie_types_htcap *ht_cap;
759
760 /* The tlv_buf_len is calculated for each scan command. The TLVs added
761 in this routine will be preserved since the routine that sends the
762 command will append channelTLVs at *chan_list_out. The difference
763 between the *chan_list_out and the tlv_buf start will be used to
764 calculate the size of anything we add in this routine. */
765 scan_cfg_out->tlv_buf_len = 0;
766
767 /* Running tlv pointer. Assigned to chan_list_out at end of function
768 so later routines know where channels can be added to the command
769 buf */
770 tlv_pos = scan_cfg_out->tlv_buf;
771
772 /* Initialize the scan as un-filtered; the flag is later set to TRUE
773 below if a SSID or BSSID filter is sent in the command */
774 *filtered_scan = false;
775
776 /* Initialize the scan as not being only on the current channel. If
777 the channel list is customized, only contains one channel, and is
778 the active channel, this is set true and data flow is not halted. */
779 *scan_current_only = false;
780
781 if (user_scan_in) {
782
783 /* Default the ssid_filter flag to TRUE, set false under
784 certain wildcard conditions and qualified by the existence
785 of an SSID list before marking the scan as filtered */
786 ssid_filter = true;
787
788 /* Set the BSS type scan filter, use Adapter setting if
789 unset */
790 scan_cfg_out->bss_mode =
791 (user_scan_in->bss_mode ? (u8) user_scan_in->
792 bss_mode : (u8) adapter->scan_mode);
793
794 /* Set the number of probes to send, use Adapter setting
795 if unset */
796 num_probes =
797 (user_scan_in->num_probes ? user_scan_in->
798 num_probes : adapter->scan_probes);
799
800 /*
801 * Set the BSSID filter to the incoming configuration,
802 * if non-zero. If not set, it will remain disabled
803 * (all zeros).
804 */
805 memcpy(scan_cfg_out->specific_bssid,
806 user_scan_in->specific_bssid,
807 sizeof(scan_cfg_out->specific_bssid));
808
809 for (i = 0; i < user_scan_in->num_ssids; i++) {
810 ssid_len = user_scan_in->ssid_list[i].ssid_len;
811
812 wildcard_ssid_tlv =
813 (struct mwifiex_ie_types_wildcard_ssid_params *)
814 tlv_pos;
815 wildcard_ssid_tlv->header.type =
816 cpu_to_le16(TLV_TYPE_WILDCARDSSID);
817 wildcard_ssid_tlv->header.len = cpu_to_le16(
818 (u16) (ssid_len + sizeof(wildcard_ssid_tlv->
819 max_ssid_length)));
820
821 /*
822 * max_ssid_length = 0 tells firmware to perform
823 * specific scan for the SSID filled, whereas
824 * max_ssid_length = IEEE80211_MAX_SSID_LEN is for
825 * wildcard scan.
826 */
827 if (ssid_len)
828 wildcard_ssid_tlv->max_ssid_length = 0;
829 else
830 wildcard_ssid_tlv->max_ssid_length =
831 IEEE80211_MAX_SSID_LEN;
832
833 memcpy(wildcard_ssid_tlv->ssid,
834 user_scan_in->ssid_list[i].ssid, ssid_len);
835
836 tlv_pos += (sizeof(wildcard_ssid_tlv->header)
837 + le16_to_cpu(wildcard_ssid_tlv->header.len));
838
839 dev_dbg(adapter->dev, "info: scan: ssid[%d]: %s, %d\n",
840 i, wildcard_ssid_tlv->ssid,
841 wildcard_ssid_tlv->max_ssid_length);
842
843 /* Empty wildcard ssid with a maxlen will match many or
844 potentially all SSIDs (maxlen == 32), therefore do
845 not treat the scan as
846 filtered. */
847 if (!ssid_len && wildcard_ssid_tlv->max_ssid_length)
848 ssid_filter = false;
849 }
850
851 /*
852 * The default number of channels sent in the command is low to
853 * ensure the response buffer from the firmware does not
854 * truncate scan results. That is not an issue with an SSID
855 * or BSSID filter applied to the scan results in the firmware.
856 */
857 if ((i && ssid_filter) ||
858 !is_zero_ether_addr(scan_cfg_out->specific_bssid))
859 *filtered_scan = true;
860 } else {
861 scan_cfg_out->bss_mode = (u8) adapter->scan_mode;
862 num_probes = adapter->scan_probes;
863 }
864
865 /*
866 * If a specific BSSID or SSID is used, the number of channels in the
867 * scan command will be increased to the absolute maximum.
868 */
869 if (*filtered_scan)
870 *max_chan_per_scan = MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN;
871 else
872 *max_chan_per_scan = MWIFIEX_DEF_CHANNELS_PER_SCAN_CMD;
873
874 /* If the input config or adapter has the number of Probes set,
875 add tlv */
876 if (num_probes) {
877
878 dev_dbg(adapter->dev, "info: scan: num_probes = %d\n",
879 num_probes);
880
881 num_probes_tlv = (struct mwifiex_ie_types_num_probes *) tlv_pos;
882 num_probes_tlv->header.type = cpu_to_le16(TLV_TYPE_NUMPROBES);
883 num_probes_tlv->header.len =
884 cpu_to_le16(sizeof(num_probes_tlv->num_probes));
885 num_probes_tlv->num_probes = cpu_to_le16((u16) num_probes);
886
887 tlv_pos += sizeof(num_probes_tlv->header) +
888 le16_to_cpu(num_probes_tlv->header.len);
889
890 }
891
892 /* Append rates tlv */
893 memset(rates, 0, sizeof(rates));
894
895 rates_size = mwifiex_get_supported_rates(priv, rates);
896
897 rates_tlv = (struct mwifiex_ie_types_rates_param_set *) tlv_pos;
898 rates_tlv->header.type = cpu_to_le16(WLAN_EID_SUPP_RATES);
899 rates_tlv->header.len = cpu_to_le16((u16) rates_size);
900 memcpy(rates_tlv->rates, rates, rates_size);
901 tlv_pos += sizeof(rates_tlv->header) + rates_size;
902
903 dev_dbg(adapter->dev, "info: SCAN_CMD: Rates size = %d\n", rates_size);
904
905 if (ISSUPP_11NENABLED(priv->adapter->fw_cap_info) &&
906 (priv->adapter->config_bands & BAND_GN ||
907 priv->adapter->config_bands & BAND_AN)) {
908 ht_cap = (struct mwifiex_ie_types_htcap *) tlv_pos;
909 memset(ht_cap, 0, sizeof(struct mwifiex_ie_types_htcap));
910 ht_cap->header.type = cpu_to_le16(WLAN_EID_HT_CAPABILITY);
911 ht_cap->header.len =
912 cpu_to_le16(sizeof(struct ieee80211_ht_cap));
913 radio_type =
914 mwifiex_band_to_radio_type(priv->adapter->config_bands);
915 mwifiex_fill_cap_info(priv, radio_type, ht_cap);
916 tlv_pos += sizeof(struct mwifiex_ie_types_htcap);
917 }
918
919 /* Append vendor specific IE TLV */
920 mwifiex_cmd_append_vsie_tlv(priv, MWIFIEX_VSIE_MASK_SCAN, &tlv_pos);
921
922 /*
923 * Set the output for the channel TLV to the address in the tlv buffer
924 * past any TLVs that were added in this function (SSID, num_probes).
925 * Channel TLVs will be added past this for each scan command,
926 * preserving the TLVs that were previously added.
927 */
928 *chan_list_out =
929 (struct mwifiex_ie_types_chan_list_param_set *) tlv_pos;
930
931 if (user_scan_in && user_scan_in->chan_list[0].chan_number) {
932
933 dev_dbg(adapter->dev, "info: Scan: Using supplied channel list\n");
934
935 for (chan_idx = 0;
936 chan_idx < MWIFIEX_USER_SCAN_CHAN_MAX &&
937 user_scan_in->chan_list[chan_idx].chan_number;
938 chan_idx++) {
939
940 channel = user_scan_in->chan_list[chan_idx].chan_number;
941 (scan_chan_list + chan_idx)->chan_number = channel;
942
943 radio_type =
944 user_scan_in->chan_list[chan_idx].radio_type;
945 (scan_chan_list + chan_idx)->radio_type = radio_type;
946
947 scan_type = user_scan_in->chan_list[chan_idx].scan_type;
948
949 if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE)
950 (scan_chan_list +
951 chan_idx)->chan_scan_mode_bitmap
952 |= MWIFIEX_PASSIVE_SCAN;
953 else
954 (scan_chan_list +
955 chan_idx)->chan_scan_mode_bitmap
956 &= ~MWIFIEX_PASSIVE_SCAN;
957
958 if (*filtered_scan)
959 (scan_chan_list +
960 chan_idx)->chan_scan_mode_bitmap
961 |= MWIFIEX_DISABLE_CHAN_FILT;
962
963 if (user_scan_in->chan_list[chan_idx].scan_time) {
964 scan_dur = (u16) user_scan_in->
965 chan_list[chan_idx].scan_time;
966 } else {
967 if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE)
968 scan_dur = adapter->passive_scan_time;
969 else if (*filtered_scan)
970 scan_dur = adapter->specific_scan_time;
971 else
972 scan_dur = adapter->active_scan_time;
973 }
974
975 (scan_chan_list + chan_idx)->min_scan_time =
976 cpu_to_le16(scan_dur);
977 (scan_chan_list + chan_idx)->max_scan_time =
978 cpu_to_le16(scan_dur);
979 }
980
981 /* Check if we are only scanning the current channel */
982 if ((chan_idx == 1) &&
983 (user_scan_in->chan_list[0].chan_number ==
984 priv->curr_bss_params.bss_descriptor.channel)) {
985 *scan_current_only = true;
986 dev_dbg(adapter->dev,
987 "info: Scan: Scanning current channel only\n");
988 }
989 chan_num = chan_idx;
990 } else {
991 dev_dbg(adapter->dev,
992 "info: Scan: Creating full region channel list\n");
993 chan_num = mwifiex_scan_create_channel_list(priv, user_scan_in,
994 scan_chan_list,
995 *filtered_scan);
996 }
997
998 /*
999 * In associated state we will reduce the number of channels scanned per
1000 * scan command to avoid any traffic delay/loss. This number is decided
1001 * based on total number of channels to be scanned due to constraints
1002 * of command buffers.
1003 */
1004 if (priv->media_connected) {
1005 if (chan_num < MWIFIEX_LIMIT_1_CHANNEL_PER_SCAN_CMD)
1006 *max_chan_per_scan = 1;
1007 else if (chan_num < MWIFIEX_LIMIT_2_CHANNELS_PER_SCAN_CMD)
1008 *max_chan_per_scan = 2;
1009 else if (chan_num < MWIFIEX_LIMIT_3_CHANNELS_PER_SCAN_CMD)
1010 *max_chan_per_scan = 3;
1011 else
1012 *max_chan_per_scan = 4;
1013 }
1014 }
1015
1016 /*
1017 * This function inspects the scan response buffer for pointers to
1018 * expected TLVs.
1019 *
1020 * TLVs can be included at the end of the scan response BSS information.
1021 *
1022 * Data in the buffer is parsed pointers to TLVs that can potentially
1023 * be passed back in the response.
1024 */
1025 static void
1026 mwifiex_ret_802_11_scan_get_tlv_ptrs(struct mwifiex_adapter *adapter,
1027 struct mwifiex_ie_types_data *tlv,
1028 u32 tlv_buf_size, u32 req_tlv_type,
1029 struct mwifiex_ie_types_data **tlv_data)
1030 {
1031 struct mwifiex_ie_types_data *current_tlv;
1032 u32 tlv_buf_left;
1033 u32 tlv_type;
1034 u32 tlv_len;
1035
1036 current_tlv = tlv;
1037 tlv_buf_left = tlv_buf_size;
1038 *tlv_data = NULL;
1039
1040 dev_dbg(adapter->dev, "info: SCAN_RESP: tlv_buf_size = %d\n",
1041 tlv_buf_size);
1042
1043 while (tlv_buf_left >= sizeof(struct mwifiex_ie_types_header)) {
1044
1045 tlv_type = le16_to_cpu(current_tlv->header.type);
1046 tlv_len = le16_to_cpu(current_tlv->header.len);
1047
1048 if (sizeof(tlv->header) + tlv_len > tlv_buf_left) {
1049 dev_err(adapter->dev, "SCAN_RESP: TLV buffer corrupt\n");
1050 break;
1051 }
1052
1053 if (req_tlv_type == tlv_type) {
1054 switch (tlv_type) {
1055 case TLV_TYPE_TSFTIMESTAMP:
1056 dev_dbg(adapter->dev, "info: SCAN_RESP: TSF "
1057 "timestamp TLV, len = %d\n", tlv_len);
1058 *tlv_data = current_tlv;
1059 break;
1060 case TLV_TYPE_CHANNELBANDLIST:
1061 dev_dbg(adapter->dev, "info: SCAN_RESP: channel"
1062 " band list TLV, len = %d\n", tlv_len);
1063 *tlv_data = current_tlv;
1064 break;
1065 default:
1066 dev_err(adapter->dev,
1067 "SCAN_RESP: unhandled TLV = %d\n",
1068 tlv_type);
1069 /* Give up, this seems corrupted */
1070 return;
1071 }
1072 }
1073
1074 if (*tlv_data)
1075 break;
1076
1077
1078 tlv_buf_left -= (sizeof(tlv->header) + tlv_len);
1079 current_tlv =
1080 (struct mwifiex_ie_types_data *) (current_tlv->data +
1081 tlv_len);
1082
1083 } /* while */
1084 }
1085
1086 /*
1087 * This function parses provided beacon buffer and updates
1088 * respective fields in bss descriptor structure.
1089 */
1090 int mwifiex_update_bss_desc_with_ie(struct mwifiex_adapter *adapter,
1091 struct mwifiex_bssdescriptor *bss_entry)
1092 {
1093 int ret = 0;
1094 u8 element_id;
1095 struct ieee_types_fh_param_set *fh_param_set;
1096 struct ieee_types_ds_param_set *ds_param_set;
1097 struct ieee_types_cf_param_set *cf_param_set;
1098 struct ieee_types_ibss_param_set *ibss_param_set;
1099 u8 *current_ptr;
1100 u8 *rate;
1101 u8 element_len;
1102 u16 total_ie_len;
1103 u8 bytes_to_copy;
1104 u8 rate_size;
1105 u8 found_data_rate_ie;
1106 u32 bytes_left;
1107 struct ieee_types_vendor_specific *vendor_ie;
1108 const u8 wpa_oui[4] = { 0x00, 0x50, 0xf2, 0x01 };
1109 const u8 wmm_oui[4] = { 0x00, 0x50, 0xf2, 0x02 };
1110
1111 found_data_rate_ie = false;
1112 rate_size = 0;
1113 current_ptr = bss_entry->beacon_buf;
1114 bytes_left = bss_entry->beacon_buf_size;
1115
1116 /* Process variable IE */
1117 while (bytes_left >= 2) {
1118 element_id = *current_ptr;
1119 element_len = *(current_ptr + 1);
1120 total_ie_len = element_len + sizeof(struct ieee_types_header);
1121
1122 if (bytes_left < total_ie_len) {
1123 dev_err(adapter->dev, "err: InterpretIE: in processing"
1124 " IE, bytes left < IE length\n");
1125 return -1;
1126 }
1127 switch (element_id) {
1128 case WLAN_EID_SSID:
1129 bss_entry->ssid.ssid_len = element_len;
1130 memcpy(bss_entry->ssid.ssid, (current_ptr + 2),
1131 element_len);
1132 dev_dbg(adapter->dev,
1133 "info: InterpretIE: ssid: %-32s\n",
1134 bss_entry->ssid.ssid);
1135 break;
1136
1137 case WLAN_EID_SUPP_RATES:
1138 memcpy(bss_entry->data_rates, current_ptr + 2,
1139 element_len);
1140 memcpy(bss_entry->supported_rates, current_ptr + 2,
1141 element_len);
1142 rate_size = element_len;
1143 found_data_rate_ie = true;
1144 break;
1145
1146 case WLAN_EID_FH_PARAMS:
1147 fh_param_set =
1148 (struct ieee_types_fh_param_set *) current_ptr;
1149 memcpy(&bss_entry->phy_param_set.fh_param_set,
1150 fh_param_set,
1151 sizeof(struct ieee_types_fh_param_set));
1152 break;
1153
1154 case WLAN_EID_DS_PARAMS:
1155 ds_param_set =
1156 (struct ieee_types_ds_param_set *) current_ptr;
1157
1158 bss_entry->channel = ds_param_set->current_chan;
1159
1160 memcpy(&bss_entry->phy_param_set.ds_param_set,
1161 ds_param_set,
1162 sizeof(struct ieee_types_ds_param_set));
1163 break;
1164
1165 case WLAN_EID_CF_PARAMS:
1166 cf_param_set =
1167 (struct ieee_types_cf_param_set *) current_ptr;
1168 memcpy(&bss_entry->ss_param_set.cf_param_set,
1169 cf_param_set,
1170 sizeof(struct ieee_types_cf_param_set));
1171 break;
1172
1173 case WLAN_EID_IBSS_PARAMS:
1174 ibss_param_set =
1175 (struct ieee_types_ibss_param_set *)
1176 current_ptr;
1177 memcpy(&bss_entry->ss_param_set.ibss_param_set,
1178 ibss_param_set,
1179 sizeof(struct ieee_types_ibss_param_set));
1180 break;
1181
1182 case WLAN_EID_ERP_INFO:
1183 bss_entry->erp_flags = *(current_ptr + 2);
1184 break;
1185
1186 case WLAN_EID_PWR_CONSTRAINT:
1187 bss_entry->local_constraint = *(current_ptr + 2);
1188 bss_entry->sensed_11h = true;
1189 break;
1190
1191 case WLAN_EID_CHANNEL_SWITCH:
1192 bss_entry->chan_sw_ie_present = true;
1193 case WLAN_EID_PWR_CAPABILITY:
1194 case WLAN_EID_TPC_REPORT:
1195 case WLAN_EID_QUIET:
1196 bss_entry->sensed_11h = true;
1197 break;
1198
1199 case WLAN_EID_EXT_SUPP_RATES:
1200 /*
1201 * Only process extended supported rate
1202 * if data rate is already found.
1203 * Data rate IE should come before
1204 * extended supported rate IE
1205 */
1206 if (found_data_rate_ie) {
1207 if ((element_len + rate_size) >
1208 MWIFIEX_SUPPORTED_RATES)
1209 bytes_to_copy =
1210 (MWIFIEX_SUPPORTED_RATES -
1211 rate_size);
1212 else
1213 bytes_to_copy = element_len;
1214
1215 rate = (u8 *) bss_entry->data_rates;
1216 rate += rate_size;
1217 memcpy(rate, current_ptr + 2, bytes_to_copy);
1218
1219 rate = (u8 *) bss_entry->supported_rates;
1220 rate += rate_size;
1221 memcpy(rate, current_ptr + 2, bytes_to_copy);
1222 }
1223 break;
1224
1225 case WLAN_EID_VENDOR_SPECIFIC:
1226 vendor_ie = (struct ieee_types_vendor_specific *)
1227 current_ptr;
1228
1229 if (!memcmp
1230 (vendor_ie->vend_hdr.oui, wpa_oui,
1231 sizeof(wpa_oui))) {
1232 bss_entry->bcn_wpa_ie =
1233 (struct ieee_types_vendor_specific *)
1234 current_ptr;
1235 bss_entry->wpa_offset = (u16)
1236 (current_ptr - bss_entry->beacon_buf);
1237 } else if (!memcmp(vendor_ie->vend_hdr.oui, wmm_oui,
1238 sizeof(wmm_oui))) {
1239 if (total_ie_len ==
1240 sizeof(struct ieee_types_wmm_parameter) ||
1241 total_ie_len ==
1242 sizeof(struct ieee_types_wmm_info))
1243 /*
1244 * Only accept and copy the WMM IE if
1245 * it matches the size expected for the
1246 * WMM Info IE or the WMM Parameter IE.
1247 */
1248 memcpy((u8 *) &bss_entry->wmm_ie,
1249 current_ptr, total_ie_len);
1250 }
1251 break;
1252 case WLAN_EID_RSN:
1253 bss_entry->bcn_rsn_ie =
1254 (struct ieee_types_generic *) current_ptr;
1255 bss_entry->rsn_offset = (u16) (current_ptr -
1256 bss_entry->beacon_buf);
1257 break;
1258 case WLAN_EID_BSS_AC_ACCESS_DELAY:
1259 bss_entry->bcn_wapi_ie =
1260 (struct ieee_types_generic *) current_ptr;
1261 bss_entry->wapi_offset = (u16) (current_ptr -
1262 bss_entry->beacon_buf);
1263 break;
1264 case WLAN_EID_HT_CAPABILITY:
1265 bss_entry->bcn_ht_cap = (struct ieee80211_ht_cap *)
1266 (current_ptr +
1267 sizeof(struct ieee_types_header));
1268 bss_entry->ht_cap_offset = (u16) (current_ptr +
1269 sizeof(struct ieee_types_header) -
1270 bss_entry->beacon_buf);
1271 break;
1272 case WLAN_EID_HT_OPERATION:
1273 bss_entry->bcn_ht_oper =
1274 (struct ieee80211_ht_operation *)(current_ptr +
1275 sizeof(struct ieee_types_header));
1276 bss_entry->ht_info_offset = (u16) (current_ptr +
1277 sizeof(struct ieee_types_header) -
1278 bss_entry->beacon_buf);
1279 break;
1280 case WLAN_EID_VHT_CAPABILITY:
1281 bss_entry->disable_11ac = false;
1282 bss_entry->bcn_vht_cap =
1283 (void *)(current_ptr +
1284 sizeof(struct ieee_types_header));
1285 bss_entry->vht_cap_offset =
1286 (u16)((u8 *)bss_entry->bcn_vht_cap -
1287 bss_entry->beacon_buf);
1288 break;
1289 case WLAN_EID_VHT_OPERATION:
1290 bss_entry->bcn_vht_oper =
1291 (void *)(current_ptr +
1292 sizeof(struct ieee_types_header));
1293 bss_entry->vht_info_offset =
1294 (u16)((u8 *)bss_entry->bcn_vht_oper -
1295 bss_entry->beacon_buf);
1296 break;
1297 case WLAN_EID_BSS_COEX_2040:
1298 bss_entry->bcn_bss_co_2040 = current_ptr +
1299 sizeof(struct ieee_types_header);
1300 bss_entry->bss_co_2040_offset = (u16) (current_ptr +
1301 sizeof(struct ieee_types_header) -
1302 bss_entry->beacon_buf);
1303 break;
1304 case WLAN_EID_EXT_CAPABILITY:
1305 bss_entry->bcn_ext_cap = current_ptr +
1306 sizeof(struct ieee_types_header);
1307 bss_entry->ext_cap_offset = (u16) (current_ptr +
1308 sizeof(struct ieee_types_header) -
1309 bss_entry->beacon_buf);
1310 break;
1311 case WLAN_EID_OPMODE_NOTIF:
1312 bss_entry->oper_mode =
1313 (void *)(current_ptr +
1314 sizeof(struct ieee_types_header));
1315 bss_entry->oper_mode_offset =
1316 (u16)((u8 *)bss_entry->oper_mode -
1317 bss_entry->beacon_buf);
1318 break;
1319 default:
1320 break;
1321 }
1322
1323 current_ptr += element_len + 2;
1324
1325 /* Need to account for IE ID and IE Len */
1326 bytes_left -= (element_len + 2);
1327
1328 } /* while (bytes_left > 2) */
1329 return ret;
1330 }
1331
1332 /*
1333 * This function converts radio type scan parameter to a band configuration
1334 * to be used in join command.
1335 */
1336 static u8
1337 mwifiex_radio_type_to_band(u8 radio_type)
1338 {
1339 switch (radio_type) {
1340 case HostCmd_SCAN_RADIO_TYPE_A:
1341 return BAND_A;
1342 case HostCmd_SCAN_RADIO_TYPE_BG:
1343 default:
1344 return BAND_G;
1345 }
1346 }
1347
1348 /*
1349 * This is an internal function used to start a scan based on an input
1350 * configuration.
1351 *
1352 * This uses the input user scan configuration information when provided in
1353 * order to send the appropriate scan commands to firmware to populate or
1354 * update the internal driver scan table.
1355 */
1356 int mwifiex_scan_networks(struct mwifiex_private *priv,
1357 const struct mwifiex_user_scan_cfg *user_scan_in)
1358 {
1359 int ret;
1360 struct mwifiex_adapter *adapter = priv->adapter;
1361 struct cmd_ctrl_node *cmd_node;
1362 union mwifiex_scan_cmd_config_tlv *scan_cfg_out;
1363 struct mwifiex_ie_types_chan_list_param_set *chan_list_out;
1364 struct mwifiex_chan_scan_param_set *scan_chan_list;
1365 u8 filtered_scan;
1366 u8 scan_current_chan_only;
1367 u8 max_chan_per_scan;
1368 unsigned long flags;
1369
1370 if (adapter->scan_processing) {
1371 dev_err(adapter->dev, "cmd: Scan already in process...\n");
1372 return -EBUSY;
1373 }
1374
1375 if (priv->scan_block) {
1376 dev_err(adapter->dev,
1377 "cmd: Scan is blocked during association...\n");
1378 return -EBUSY;
1379 }
1380
1381 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
1382 adapter->scan_processing = true;
1383 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
1384
1385 scan_cfg_out = kzalloc(sizeof(union mwifiex_scan_cmd_config_tlv),
1386 GFP_KERNEL);
1387 if (!scan_cfg_out) {
1388 ret = -ENOMEM;
1389 goto done;
1390 }
1391
1392 scan_chan_list = kcalloc(MWIFIEX_USER_SCAN_CHAN_MAX,
1393 sizeof(struct mwifiex_chan_scan_param_set),
1394 GFP_KERNEL);
1395 if (!scan_chan_list) {
1396 kfree(scan_cfg_out);
1397 ret = -ENOMEM;
1398 goto done;
1399 }
1400
1401 mwifiex_config_scan(priv, user_scan_in, &scan_cfg_out->config,
1402 &chan_list_out, scan_chan_list, &max_chan_per_scan,
1403 &filtered_scan, &scan_current_chan_only);
1404
1405 ret = mwifiex_scan_channel_list(priv, max_chan_per_scan, filtered_scan,
1406 &scan_cfg_out->config, chan_list_out,
1407 scan_chan_list);
1408
1409 /* Get scan command from scan_pending_q and put to cmd_pending_q */
1410 if (!ret) {
1411 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
1412 if (!list_empty(&adapter->scan_pending_q)) {
1413 cmd_node = list_first_entry(&adapter->scan_pending_q,
1414 struct cmd_ctrl_node, list);
1415 list_del(&cmd_node->list);
1416 spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
1417 flags);
1418 mwifiex_insert_cmd_to_pending_q(adapter, cmd_node,
1419 true);
1420 queue_work(adapter->workqueue, &adapter->main_work);
1421
1422 /* Perform internal scan synchronously */
1423 if (!priv->scan_request) {
1424 dev_dbg(adapter->dev, "wait internal scan\n");
1425 mwifiex_wait_queue_complete(adapter, cmd_node);
1426 }
1427 } else {
1428 spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
1429 flags);
1430 }
1431 }
1432
1433 kfree(scan_cfg_out);
1434 kfree(scan_chan_list);
1435 done:
1436 if (ret) {
1437 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
1438 adapter->scan_processing = false;
1439 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
1440 }
1441 return ret;
1442 }
1443
1444 /*
1445 * This function prepares a scan command to be sent to the firmware.
1446 *
1447 * This uses the scan command configuration sent to the command processing
1448 * module in command preparation stage to configure a scan command structure
1449 * to send to firmware.
1450 *
1451 * The fixed fields specifying the BSS type and BSSID filters as well as a
1452 * variable number/length of TLVs are sent in the command to firmware.
1453 *
1454 * Preparation also includes -
1455 * - Setting command ID, and proper size
1456 * - Ensuring correct endian-ness
1457 */
1458 int mwifiex_cmd_802_11_scan(struct host_cmd_ds_command *cmd,
1459 struct mwifiex_scan_cmd_config *scan_cfg)
1460 {
1461 struct host_cmd_ds_802_11_scan *scan_cmd = &cmd->params.scan;
1462
1463 /* Set fixed field variables in scan command */
1464 scan_cmd->bss_mode = scan_cfg->bss_mode;
1465 memcpy(scan_cmd->bssid, scan_cfg->specific_bssid,
1466 sizeof(scan_cmd->bssid));
1467 memcpy(scan_cmd->tlv_buffer, scan_cfg->tlv_buf, scan_cfg->tlv_buf_len);
1468
1469 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_SCAN);
1470
1471 /* Size is equal to the sizeof(fixed portions) + the TLV len + header */
1472 cmd->size = cpu_to_le16((u16) (sizeof(scan_cmd->bss_mode)
1473 + sizeof(scan_cmd->bssid)
1474 + scan_cfg->tlv_buf_len + S_DS_GEN));
1475
1476 return 0;
1477 }
1478
1479 /*
1480 * This function checks compatibility of requested network with current
1481 * driver settings.
1482 */
1483 int mwifiex_check_network_compatibility(struct mwifiex_private *priv,
1484 struct mwifiex_bssdescriptor *bss_desc)
1485 {
1486 int ret = -1;
1487
1488 if (!bss_desc)
1489 return -1;
1490
1491 if ((mwifiex_get_cfp(priv, (u8) bss_desc->bss_band,
1492 (u16) bss_desc->channel, 0))) {
1493 switch (priv->bss_mode) {
1494 case NL80211_IFTYPE_STATION:
1495 case NL80211_IFTYPE_ADHOC:
1496 ret = mwifiex_is_network_compatible(priv, bss_desc,
1497 priv->bss_mode);
1498 if (ret)
1499 dev_err(priv->adapter->dev,
1500 "Incompatible network settings\n");
1501 break;
1502 default:
1503 ret = 0;
1504 }
1505 }
1506
1507 return ret;
1508 }
1509
1510 static int mwifiex_update_curr_bss_params(struct mwifiex_private *priv,
1511 struct cfg80211_bss *bss)
1512 {
1513 struct mwifiex_bssdescriptor *bss_desc;
1514 int ret;
1515 unsigned long flags;
1516
1517 /* Allocate and fill new bss descriptor */
1518 bss_desc = kzalloc(sizeof(struct mwifiex_bssdescriptor), GFP_KERNEL);
1519 if (!bss_desc)
1520 return -ENOMEM;
1521
1522 ret = mwifiex_fill_new_bss_desc(priv, bss, bss_desc);
1523 if (ret)
1524 goto done;
1525
1526 ret = mwifiex_check_network_compatibility(priv, bss_desc);
1527 if (ret)
1528 goto done;
1529
1530 spin_lock_irqsave(&priv->curr_bcn_buf_lock, flags);
1531 /* Make a copy of current BSSID descriptor */
1532 memcpy(&priv->curr_bss_params.bss_descriptor, bss_desc,
1533 sizeof(priv->curr_bss_params.bss_descriptor));
1534
1535 /* The contents of beacon_ie will be copied to its own buffer
1536 * in mwifiex_save_curr_bcn()
1537 */
1538 mwifiex_save_curr_bcn(priv);
1539 spin_unlock_irqrestore(&priv->curr_bcn_buf_lock, flags);
1540
1541 done:
1542 /* beacon_ie buffer was allocated in function
1543 * mwifiex_fill_new_bss_desc(). Free it now.
1544 */
1545 kfree(bss_desc->beacon_buf);
1546 kfree(bss_desc);
1547 return 0;
1548 }
1549
1550 /*
1551 * This function handles the command response of scan.
1552 *
1553 * The response buffer for the scan command has the following
1554 * memory layout:
1555 *
1556 * .-------------------------------------------------------------.
1557 * | Header (4 * sizeof(t_u16)): Standard command response hdr |
1558 * .-------------------------------------------------------------.
1559 * | BufSize (t_u16) : sizeof the BSS Description data |
1560 * .-------------------------------------------------------------.
1561 * | NumOfSet (t_u8) : Number of BSS Descs returned |
1562 * .-------------------------------------------------------------.
1563 * | BSSDescription data (variable, size given in BufSize) |
1564 * .-------------------------------------------------------------.
1565 * | TLV data (variable, size calculated using Header->Size, |
1566 * | BufSize and sizeof the fixed fields above) |
1567 * .-------------------------------------------------------------.
1568 */
1569 int mwifiex_ret_802_11_scan(struct mwifiex_private *priv,
1570 struct host_cmd_ds_command *resp)
1571 {
1572 int ret = 0;
1573 struct mwifiex_adapter *adapter = priv->adapter;
1574 struct cmd_ctrl_node *cmd_node;
1575 struct host_cmd_ds_802_11_scan_rsp *scan_rsp;
1576 struct mwifiex_ie_types_data *tlv_data;
1577 struct mwifiex_ie_types_tsf_timestamp *tsf_tlv;
1578 u8 *bss_info;
1579 u32 scan_resp_size;
1580 u32 bytes_left;
1581 u32 idx;
1582 u32 tlv_buf_size;
1583 struct mwifiex_chan_freq_power *cfp;
1584 struct mwifiex_ie_types_chan_band_list_param_set *chan_band_tlv;
1585 struct chan_band_param_set *chan_band;
1586 u8 is_bgscan_resp;
1587 unsigned long flags;
1588 struct cfg80211_bss *bss;
1589
1590 is_bgscan_resp = (le16_to_cpu(resp->command)
1591 == HostCmd_CMD_802_11_BG_SCAN_QUERY);
1592 if (is_bgscan_resp)
1593 scan_rsp = &resp->params.bg_scan_query_resp.scan_resp;
1594 else
1595 scan_rsp = &resp->params.scan_resp;
1596
1597
1598 if (scan_rsp->number_of_sets > MWIFIEX_MAX_AP) {
1599 dev_err(adapter->dev, "SCAN_RESP: too many AP returned (%d)\n",
1600 scan_rsp->number_of_sets);
1601 ret = -1;
1602 goto check_next_scan;
1603 }
1604
1605 /* Check csa channel expiry before parsing scan response */
1606 mwifiex_11h_get_csa_closed_channel(priv);
1607
1608 bytes_left = le16_to_cpu(scan_rsp->bss_descript_size);
1609 dev_dbg(adapter->dev, "info: SCAN_RESP: bss_descript_size %d\n",
1610 bytes_left);
1611
1612 scan_resp_size = le16_to_cpu(resp->size);
1613
1614 dev_dbg(adapter->dev,
1615 "info: SCAN_RESP: returned %d APs before parsing\n",
1616 scan_rsp->number_of_sets);
1617
1618 bss_info = scan_rsp->bss_desc_and_tlv_buffer;
1619
1620 /*
1621 * The size of the TLV buffer is equal to the entire command response
1622 * size (scan_resp_size) minus the fixed fields (sizeof()'s), the
1623 * BSS Descriptions (bss_descript_size as bytesLef) and the command
1624 * response header (S_DS_GEN)
1625 */
1626 tlv_buf_size = scan_resp_size - (bytes_left
1627 + sizeof(scan_rsp->bss_descript_size)
1628 + sizeof(scan_rsp->number_of_sets)
1629 + S_DS_GEN);
1630
1631 tlv_data = (struct mwifiex_ie_types_data *) (scan_rsp->
1632 bss_desc_and_tlv_buffer +
1633 bytes_left);
1634
1635 /* Search the TLV buffer space in the scan response for any valid
1636 TLVs */
1637 mwifiex_ret_802_11_scan_get_tlv_ptrs(adapter, tlv_data, tlv_buf_size,
1638 TLV_TYPE_TSFTIMESTAMP,
1639 (struct mwifiex_ie_types_data **)
1640 &tsf_tlv);
1641
1642 /* Search the TLV buffer space in the scan response for any valid
1643 TLVs */
1644 mwifiex_ret_802_11_scan_get_tlv_ptrs(adapter, tlv_data, tlv_buf_size,
1645 TLV_TYPE_CHANNELBANDLIST,
1646 (struct mwifiex_ie_types_data **)
1647 &chan_band_tlv);
1648
1649 for (idx = 0; idx < scan_rsp->number_of_sets && bytes_left; idx++) {
1650 u8 bssid[ETH_ALEN];
1651 s32 rssi;
1652 const u8 *ie_buf;
1653 size_t ie_len;
1654 u16 channel = 0;
1655 u64 fw_tsf = 0;
1656 u16 beacon_size = 0;
1657 u32 curr_bcn_bytes;
1658 u32 freq;
1659 u16 beacon_period;
1660 u16 cap_info_bitmap;
1661 u8 *current_ptr;
1662 u64 timestamp;
1663 struct mwifiex_bcn_param *bcn_param;
1664 struct mwifiex_bss_priv *bss_priv;
1665
1666 if (bytes_left >= sizeof(beacon_size)) {
1667 /* Extract & convert beacon size from command buffer */
1668 memcpy(&beacon_size, bss_info, sizeof(beacon_size));
1669 bytes_left -= sizeof(beacon_size);
1670 bss_info += sizeof(beacon_size);
1671 }
1672
1673 if (!beacon_size || beacon_size > bytes_left) {
1674 bss_info += bytes_left;
1675 bytes_left = 0;
1676 ret = -1;
1677 goto check_next_scan;
1678 }
1679
1680 /* Initialize the current working beacon pointer for this BSS
1681 * iteration */
1682 current_ptr = bss_info;
1683
1684 /* Advance the return beacon pointer past the current beacon */
1685 bss_info += beacon_size;
1686 bytes_left -= beacon_size;
1687
1688 curr_bcn_bytes = beacon_size;
1689
1690 /*
1691 * First 5 fields are bssid, RSSI, time stamp, beacon interval,
1692 * and capability information
1693 */
1694 if (curr_bcn_bytes < sizeof(struct mwifiex_bcn_param)) {
1695 dev_err(adapter->dev,
1696 "InterpretIE: not enough bytes left\n");
1697 continue;
1698 }
1699 bcn_param = (struct mwifiex_bcn_param *)current_ptr;
1700 current_ptr += sizeof(*bcn_param);
1701 curr_bcn_bytes -= sizeof(*bcn_param);
1702
1703 memcpy(bssid, bcn_param->bssid, ETH_ALEN);
1704
1705 rssi = (s32) bcn_param->rssi;
1706 rssi = (-rssi) * 100; /* Convert dBm to mBm */
1707 dev_dbg(adapter->dev, "info: InterpretIE: RSSI=%d\n", rssi);
1708
1709 timestamp = le64_to_cpu(bcn_param->timestamp);
1710 beacon_period = le16_to_cpu(bcn_param->beacon_period);
1711
1712 cap_info_bitmap = le16_to_cpu(bcn_param->cap_info_bitmap);
1713 dev_dbg(adapter->dev, "info: InterpretIE: capabilities=0x%X\n",
1714 cap_info_bitmap);
1715
1716 /* Rest of the current buffer are IE's */
1717 ie_buf = current_ptr;
1718 ie_len = curr_bcn_bytes;
1719 dev_dbg(adapter->dev,
1720 "info: InterpretIE: IELength for this AP = %d\n",
1721 curr_bcn_bytes);
1722
1723 while (curr_bcn_bytes >= sizeof(struct ieee_types_header)) {
1724 u8 element_id, element_len;
1725
1726 element_id = *current_ptr;
1727 element_len = *(current_ptr + 1);
1728 if (curr_bcn_bytes < element_len +
1729 sizeof(struct ieee_types_header)) {
1730 dev_err(priv->adapter->dev,
1731 "%s: bytes left < IE length\n",
1732 __func__);
1733 goto check_next_scan;
1734 }
1735 if (element_id == WLAN_EID_DS_PARAMS) {
1736 channel = *(current_ptr + sizeof(struct ieee_types_header));
1737 break;
1738 }
1739
1740 current_ptr += element_len +
1741 sizeof(struct ieee_types_header);
1742 curr_bcn_bytes -= element_len +
1743 sizeof(struct ieee_types_header);
1744 }
1745
1746 /*
1747 * If the TSF TLV was appended to the scan results, save this
1748 * entry's TSF value in the fw_tsf field. It is the firmware's
1749 * TSF value at the time the beacon or probe response was
1750 * received.
1751 */
1752 if (tsf_tlv)
1753 memcpy(&fw_tsf, &tsf_tlv->tsf_data[idx * TSF_DATA_SIZE],
1754 sizeof(fw_tsf));
1755
1756 if (channel) {
1757 struct ieee80211_channel *chan;
1758 u8 band;
1759
1760 /* Skip entry if on csa closed channel */
1761 if (channel == priv->csa_chan) {
1762 dev_dbg(adapter->dev,
1763 "Dropping entry on csa closed channel\n");
1764 continue;
1765 }
1766
1767 band = BAND_G;
1768 if (chan_band_tlv) {
1769 chan_band =
1770 &chan_band_tlv->chan_band_param[idx];
1771 band = mwifiex_radio_type_to_band(
1772 chan_band->radio_type
1773 & (BIT(0) | BIT(1)));
1774 }
1775
1776 cfp = mwifiex_get_cfp(priv, band, channel, 0);
1777
1778 freq = cfp ? cfp->freq : 0;
1779
1780 chan = ieee80211_get_channel(priv->wdev->wiphy, freq);
1781
1782 if (chan && !(chan->flags & IEEE80211_CHAN_DISABLED)) {
1783 bss = cfg80211_inform_bss(priv->wdev->wiphy,
1784 chan, bssid, timestamp,
1785 cap_info_bitmap, beacon_period,
1786 ie_buf, ie_len, rssi, GFP_KERNEL);
1787 bss_priv = (struct mwifiex_bss_priv *)bss->priv;
1788 bss_priv->band = band;
1789 bss_priv->fw_tsf = fw_tsf;
1790 if (priv->media_connected &&
1791 !memcmp(bssid,
1792 priv->curr_bss_params.bss_descriptor
1793 .mac_address, ETH_ALEN))
1794 mwifiex_update_curr_bss_params(priv,
1795 bss);
1796 cfg80211_put_bss(priv->wdev->wiphy, bss);
1797 }
1798 } else {
1799 dev_dbg(adapter->dev, "missing BSS channel IE\n");
1800 }
1801 }
1802
1803 check_next_scan:
1804 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
1805 if (list_empty(&adapter->scan_pending_q)) {
1806 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
1807 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
1808 adapter->scan_processing = false;
1809 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
1810
1811 /* Need to indicate IOCTL complete */
1812 if (adapter->curr_cmd->wait_q_enabled) {
1813 adapter->cmd_wait_q.status = 0;
1814 if (!priv->scan_request) {
1815 dev_dbg(adapter->dev,
1816 "complete internal scan\n");
1817 mwifiex_complete_cmd(adapter,
1818 adapter->curr_cmd);
1819 }
1820 }
1821 if (priv->report_scan_result)
1822 priv->report_scan_result = false;
1823
1824 if (priv->scan_request) {
1825 dev_dbg(adapter->dev, "info: notifying scan done\n");
1826 cfg80211_scan_done(priv->scan_request, 0);
1827 priv->scan_request = NULL;
1828 } else {
1829 priv->scan_aborting = false;
1830 dev_dbg(adapter->dev, "info: scan already aborted\n");
1831 }
1832 } else {
1833 if ((priv->scan_aborting && !priv->scan_request) ||
1834 priv->scan_block) {
1835 spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
1836 flags);
1837 adapter->scan_delay_cnt = MWIFIEX_MAX_SCAN_DELAY_CNT;
1838 mod_timer(&priv->scan_delay_timer, jiffies);
1839 dev_dbg(priv->adapter->dev,
1840 "info: %s: triggerring scan abort\n", __func__);
1841 } else if (!mwifiex_wmm_lists_empty(adapter) &&
1842 (priv->scan_request && (priv->scan_request->flags &
1843 NL80211_SCAN_FLAG_LOW_PRIORITY))) {
1844 spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
1845 flags);
1846 adapter->scan_delay_cnt = 1;
1847 mod_timer(&priv->scan_delay_timer, jiffies +
1848 msecs_to_jiffies(MWIFIEX_SCAN_DELAY_MSEC));
1849 dev_dbg(priv->adapter->dev,
1850 "info: %s: deferring scan\n", __func__);
1851 } else {
1852 /* Get scan command from scan_pending_q and put to
1853 cmd_pending_q */
1854 cmd_node = list_first_entry(&adapter->scan_pending_q,
1855 struct cmd_ctrl_node, list);
1856 list_del(&cmd_node->list);
1857 spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
1858 flags);
1859 mwifiex_insert_cmd_to_pending_q(adapter, cmd_node,
1860 true);
1861 }
1862 }
1863
1864 return ret;
1865 }
1866
1867 /*
1868 * This function prepares command for background scan query.
1869 *
1870 * Preparation includes -
1871 * - Setting command ID and proper size
1872 * - Setting background scan flush parameter
1873 * - Ensuring correct endian-ness
1874 */
1875 int mwifiex_cmd_802_11_bg_scan_query(struct host_cmd_ds_command *cmd)
1876 {
1877 struct host_cmd_ds_802_11_bg_scan_query *bg_query =
1878 &cmd->params.bg_scan_query;
1879
1880 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_BG_SCAN_QUERY);
1881 cmd->size = cpu_to_le16(sizeof(struct host_cmd_ds_802_11_bg_scan_query)
1882 + S_DS_GEN);
1883
1884 bg_query->flush = 1;
1885
1886 return 0;
1887 }
1888
1889 /*
1890 * This function inserts scan command node to the scan pending queue.
1891 */
1892 void
1893 mwifiex_queue_scan_cmd(struct mwifiex_private *priv,
1894 struct cmd_ctrl_node *cmd_node)
1895 {
1896 struct mwifiex_adapter *adapter = priv->adapter;
1897 unsigned long flags;
1898
1899 cmd_node->wait_q_enabled = true;
1900 cmd_node->condition = &adapter->scan_wait_q_woken;
1901 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
1902 list_add_tail(&cmd_node->list, &adapter->scan_pending_q);
1903 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
1904 }
1905
1906 /*
1907 * This function sends a scan command for all available channels to the
1908 * firmware, filtered on a specific SSID.
1909 */
1910 static int mwifiex_scan_specific_ssid(struct mwifiex_private *priv,
1911 struct cfg80211_ssid *req_ssid)
1912 {
1913 struct mwifiex_adapter *adapter = priv->adapter;
1914 int ret;
1915 struct mwifiex_user_scan_cfg *scan_cfg;
1916
1917 if (adapter->scan_processing) {
1918 dev_err(adapter->dev, "cmd: Scan already in process...\n");
1919 return -EBUSY;
1920 }
1921
1922 if (priv->scan_block) {
1923 dev_err(adapter->dev,
1924 "cmd: Scan is blocked during association...\n");
1925 return -EBUSY;
1926 }
1927
1928 scan_cfg = kzalloc(sizeof(struct mwifiex_user_scan_cfg), GFP_KERNEL);
1929 if (!scan_cfg)
1930 return -ENOMEM;
1931
1932 scan_cfg->ssid_list = req_ssid;
1933 scan_cfg->num_ssids = 1;
1934
1935 ret = mwifiex_scan_networks(priv, scan_cfg);
1936
1937 kfree(scan_cfg);
1938 return ret;
1939 }
1940
1941 /*
1942 * Sends IOCTL request to start a scan.
1943 *
1944 * This function allocates the IOCTL request buffer, fills it
1945 * with requisite parameters and calls the IOCTL handler.
1946 *
1947 * Scan command can be issued for both normal scan and specific SSID
1948 * scan, depending upon whether an SSID is provided or not.
1949 */
1950 int mwifiex_request_scan(struct mwifiex_private *priv,
1951 struct cfg80211_ssid *req_ssid)
1952 {
1953 int ret;
1954
1955 if (down_interruptible(&priv->async_sem)) {
1956 dev_err(priv->adapter->dev, "%s: acquire semaphore\n",
1957 __func__);
1958 return -1;
1959 }
1960
1961 priv->adapter->scan_wait_q_woken = false;
1962
1963 if (req_ssid && req_ssid->ssid_len != 0)
1964 /* Specific SSID scan */
1965 ret = mwifiex_scan_specific_ssid(priv, req_ssid);
1966 else
1967 /* Normal scan */
1968 ret = mwifiex_scan_networks(priv, NULL);
1969
1970 up(&priv->async_sem);
1971
1972 return ret;
1973 }
1974
1975 /*
1976 * This function appends the vendor specific IE TLV to a buffer.
1977 */
1978 int
1979 mwifiex_cmd_append_vsie_tlv(struct mwifiex_private *priv,
1980 u16 vsie_mask, u8 **buffer)
1981 {
1982 int id, ret_len = 0;
1983 struct mwifiex_ie_types_vendor_param_set *vs_param_set;
1984
1985 if (!buffer)
1986 return 0;
1987 if (!(*buffer))
1988 return 0;
1989
1990 /*
1991 * Traverse through the saved vendor specific IE array and append
1992 * the selected(scan/assoc/adhoc) IE as TLV to the command
1993 */
1994 for (id = 0; id < MWIFIEX_MAX_VSIE_NUM; id++) {
1995 if (priv->vs_ie[id].mask & vsie_mask) {
1996 vs_param_set =
1997 (struct mwifiex_ie_types_vendor_param_set *)
1998 *buffer;
1999 vs_param_set->header.type =
2000 cpu_to_le16(TLV_TYPE_PASSTHROUGH);
2001 vs_param_set->header.len =
2002 cpu_to_le16((((u16) priv->vs_ie[id].ie[1])
2003 & 0x00FF) + 2);
2004 memcpy(vs_param_set->ie, priv->vs_ie[id].ie,
2005 le16_to_cpu(vs_param_set->header.len));
2006 *buffer += le16_to_cpu(vs_param_set->header.len) +
2007 sizeof(struct mwifiex_ie_types_header);
2008 ret_len += le16_to_cpu(vs_param_set->header.len) +
2009 sizeof(struct mwifiex_ie_types_header);
2010 }
2011 }
2012 return ret_len;
2013 }
2014
2015 /*
2016 * This function saves a beacon buffer of the current BSS descriptor.
2017 *
2018 * The current beacon buffer is saved so that it can be restored in the
2019 * following cases that makes the beacon buffer not to contain the current
2020 * ssid's beacon buffer.
2021 * - The current ssid was not found somehow in the last scan.
2022 * - The current ssid was the last entry of the scan table and overloaded.
2023 */
2024 void
2025 mwifiex_save_curr_bcn(struct mwifiex_private *priv)
2026 {
2027 struct mwifiex_bssdescriptor *curr_bss =
2028 &priv->curr_bss_params.bss_descriptor;
2029
2030 if (!curr_bss->beacon_buf_size)
2031 return;
2032
2033 /* allocate beacon buffer at 1st time; or if it's size has changed */
2034 if (!priv->curr_bcn_buf ||
2035 priv->curr_bcn_size != curr_bss->beacon_buf_size) {
2036 priv->curr_bcn_size = curr_bss->beacon_buf_size;
2037
2038 kfree(priv->curr_bcn_buf);
2039 priv->curr_bcn_buf = kmalloc(curr_bss->beacon_buf_size,
2040 GFP_ATOMIC);
2041 if (!priv->curr_bcn_buf)
2042 return;
2043 }
2044
2045 memcpy(priv->curr_bcn_buf, curr_bss->beacon_buf,
2046 curr_bss->beacon_buf_size);
2047 dev_dbg(priv->adapter->dev, "info: current beacon saved %d\n",
2048 priv->curr_bcn_size);
2049
2050 curr_bss->beacon_buf = priv->curr_bcn_buf;
2051
2052 /* adjust the pointers in the current BSS descriptor */
2053 if (curr_bss->bcn_wpa_ie)
2054 curr_bss->bcn_wpa_ie =
2055 (struct ieee_types_vendor_specific *)
2056 (curr_bss->beacon_buf +
2057 curr_bss->wpa_offset);
2058
2059 if (curr_bss->bcn_rsn_ie)
2060 curr_bss->bcn_rsn_ie = (struct ieee_types_generic *)
2061 (curr_bss->beacon_buf +
2062 curr_bss->rsn_offset);
2063
2064 if (curr_bss->bcn_ht_cap)
2065 curr_bss->bcn_ht_cap = (struct ieee80211_ht_cap *)
2066 (curr_bss->beacon_buf +
2067 curr_bss->ht_cap_offset);
2068
2069 if (curr_bss->bcn_ht_oper)
2070 curr_bss->bcn_ht_oper = (struct ieee80211_ht_operation *)
2071 (curr_bss->beacon_buf +
2072 curr_bss->ht_info_offset);
2073
2074 if (curr_bss->bcn_vht_cap)
2075 curr_bss->bcn_ht_cap = (void *)(curr_bss->beacon_buf +
2076 curr_bss->vht_cap_offset);
2077
2078 if (curr_bss->bcn_vht_oper)
2079 curr_bss->bcn_ht_oper = (void *)(curr_bss->beacon_buf +
2080 curr_bss->vht_info_offset);
2081
2082 if (curr_bss->bcn_bss_co_2040)
2083 curr_bss->bcn_bss_co_2040 =
2084 (curr_bss->beacon_buf + curr_bss->bss_co_2040_offset);
2085
2086 if (curr_bss->bcn_ext_cap)
2087 curr_bss->bcn_ext_cap = curr_bss->beacon_buf +
2088 curr_bss->ext_cap_offset;
2089
2090 if (curr_bss->oper_mode)
2091 curr_bss->oper_mode = (void *)(curr_bss->beacon_buf +
2092 curr_bss->oper_mode_offset);
2093 }
2094
2095 /*
2096 * This function frees the current BSS descriptor beacon buffer.
2097 */
2098 void
2099 mwifiex_free_curr_bcn(struct mwifiex_private *priv)
2100 {
2101 kfree(priv->curr_bcn_buf);
2102 priv->curr_bcn_buf = NULL;
2103 }
Linux kernel - Deliverables
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