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