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Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
[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 /* This function appends rate TLV to scan config command. */
547 static int
548 mwifiex_append_rate_tlv(struct mwifiex_private *priv,
549 struct mwifiex_scan_cmd_config *scan_cfg_out,
550 u8 radio)
551 {
552 struct mwifiex_ie_types_rates_param_set *rates_tlv;
553 u8 rates[MWIFIEX_SUPPORTED_RATES], *tlv_pos;
554 u32 rates_size;
555
556 memset(rates, 0, sizeof(rates));
557
558 tlv_pos = (u8 *)scan_cfg_out->tlv_buf + scan_cfg_out->tlv_buf_len;
559
560 if (priv->scan_request)
561 rates_size = mwifiex_get_rates_from_cfg80211(priv, rates,
562 radio);
563 else
564 rates_size = mwifiex_get_supported_rates(priv, rates);
565
566 dev_dbg(priv->adapter->dev, "info: SCAN_CMD: Rates size = %d\n",
567 rates_size);
568 rates_tlv = (struct mwifiex_ie_types_rates_param_set *)tlv_pos;
569 rates_tlv->header.type = cpu_to_le16(WLAN_EID_SUPP_RATES);
570 rates_tlv->header.len = cpu_to_le16((u16) rates_size);
571 memcpy(rates_tlv->rates, rates, rates_size);
572 scan_cfg_out->tlv_buf_len += sizeof(rates_tlv->header) + rates_size;
573
574 return rates_size;
575 }
576
577 /*
578 * This function constructs and sends multiple scan config commands to
579 * the firmware.
580 *
581 * Previous routines in the code flow have created a scan command configuration
582 * with any requested TLVs. This function splits the channel TLV into maximum
583 * channels supported per scan lists and sends the portion of the channel TLV,
584 * along with the other TLVs, to the firmware.
585 */
586 static int
587 mwifiex_scan_channel_list(struct mwifiex_private *priv,
588 u32 max_chan_per_scan, u8 filtered_scan,
589 struct mwifiex_scan_cmd_config *scan_cfg_out,
590 struct mwifiex_ie_types_chan_list_param_set
591 *chan_tlv_out,
592 struct mwifiex_chan_scan_param_set *scan_chan_list)
593 {
594 int ret = 0;
595 struct mwifiex_chan_scan_param_set *tmp_chan_list;
596 struct mwifiex_chan_scan_param_set *start_chan;
597
598 u32 tlv_idx, rates_size;
599 u32 total_scan_time;
600 u32 done_early;
601 u8 radio_type;
602
603 if (!scan_cfg_out || !chan_tlv_out || !scan_chan_list) {
604 dev_dbg(priv->adapter->dev,
605 "info: Scan: Null detect: %p, %p, %p\n",
606 scan_cfg_out, chan_tlv_out, scan_chan_list);
607 return -1;
608 }
609
610 /* Check csa channel expiry before preparing scan list */
611 mwifiex_11h_get_csa_closed_channel(priv);
612
613 chan_tlv_out->header.type = cpu_to_le16(TLV_TYPE_CHANLIST);
614
615 /* Set the temp channel struct pointer to the start of the desired
616 list */
617 tmp_chan_list = scan_chan_list;
618
619 /* Loop through the desired channel list, sending a new firmware scan
620 commands for each max_chan_per_scan channels (or for 1,6,11
621 individually if configured accordingly) */
622 while (tmp_chan_list->chan_number) {
623
624 tlv_idx = 0;
625 total_scan_time = 0;
626 radio_type = 0;
627 chan_tlv_out->header.len = 0;
628 start_chan = tmp_chan_list;
629 done_early = false;
630
631 /*
632 * Construct the Channel TLV for the scan command. Continue to
633 * insert channel TLVs until:
634 * - the tlv_idx hits the maximum configured per scan command
635 * - the next channel to insert is 0 (end of desired channel
636 * list)
637 * - done_early is set (controlling individual scanning of
638 * 1,6,11)
639 */
640 while (tlv_idx < max_chan_per_scan &&
641 tmp_chan_list->chan_number && !done_early) {
642
643 if (tmp_chan_list->chan_number == priv->csa_chan) {
644 tmp_chan_list++;
645 continue;
646 }
647
648 radio_type = tmp_chan_list->radio_type;
649 dev_dbg(priv->adapter->dev,
650 "info: Scan: Chan(%3d), Radio(%d),"
651 " Mode(%d, %d), Dur(%d)\n",
652 tmp_chan_list->chan_number,
653 tmp_chan_list->radio_type,
654 tmp_chan_list->chan_scan_mode_bitmap
655 & MWIFIEX_PASSIVE_SCAN,
656 (tmp_chan_list->chan_scan_mode_bitmap
657 & MWIFIEX_DISABLE_CHAN_FILT) >> 1,
658 le16_to_cpu(tmp_chan_list->max_scan_time));
659
660 /* Copy the current channel TLV to the command being
661 prepared */
662 memcpy(chan_tlv_out->chan_scan_param + tlv_idx,
663 tmp_chan_list,
664 sizeof(chan_tlv_out->chan_scan_param));
665
666 /* Increment the TLV header length by the size
667 appended */
668 le16_add_cpu(&chan_tlv_out->header.len,
669 sizeof(chan_tlv_out->chan_scan_param));
670
671 /*
672 * The tlv buffer length is set to the number of bytes
673 * of the between the channel tlv pointer and the start
674 * of the tlv buffer. This compensates for any TLVs
675 * that were appended before the channel list.
676 */
677 scan_cfg_out->tlv_buf_len = (u32) ((u8 *) chan_tlv_out -
678 scan_cfg_out->tlv_buf);
679
680 /* Add the size of the channel tlv header and the data
681 length */
682 scan_cfg_out->tlv_buf_len +=
683 (sizeof(chan_tlv_out->header)
684 + le16_to_cpu(chan_tlv_out->header.len));
685
686 /* Increment the index to the channel tlv we are
687 constructing */
688 tlv_idx++;
689
690 /* Count the total scan time per command */
691 total_scan_time +=
692 le16_to_cpu(tmp_chan_list->max_scan_time);
693
694 done_early = false;
695
696 /* Stop the loop if the *current* channel is in the
697 1,6,11 set and we are not filtering on a BSSID
698 or SSID. */
699 if (!filtered_scan &&
700 (tmp_chan_list->chan_number == 1 ||
701 tmp_chan_list->chan_number == 6 ||
702 tmp_chan_list->chan_number == 11))
703 done_early = true;
704
705 /* Increment the tmp pointer to the next channel to
706 be scanned */
707 tmp_chan_list++;
708
709 /* Stop the loop if the *next* channel is in the 1,6,11
710 set. This will cause it to be the only channel
711 scanned on the next interation */
712 if (!filtered_scan &&
713 (tmp_chan_list->chan_number == 1 ||
714 tmp_chan_list->chan_number == 6 ||
715 tmp_chan_list->chan_number == 11))
716 done_early = true;
717 }
718
719 /* The total scan time should be less than scan command timeout
720 value */
721 if (total_scan_time > MWIFIEX_MAX_TOTAL_SCAN_TIME) {
722 dev_err(priv->adapter->dev, "total scan time %dms"
723 " is over limit (%dms), scan skipped\n",
724 total_scan_time, MWIFIEX_MAX_TOTAL_SCAN_TIME);
725 ret = -1;
726 break;
727 }
728
729 rates_size = mwifiex_append_rate_tlv(priv, scan_cfg_out,
730 radio_type);
731
732 priv->adapter->scan_channels = start_chan;
733
734 /* Send the scan command to the firmware with the specified
735 cfg */
736 ret = mwifiex_send_cmd_async(priv, HostCmd_CMD_802_11_SCAN,
737 HostCmd_ACT_GEN_SET, 0,
738 scan_cfg_out);
739
740 /* rate IE is updated per scan command but same starting
741 * pointer is used each time so that rate IE from earlier
742 * scan_cfg_out->buf is overwritten with new one.
743 */
744 scan_cfg_out->tlv_buf_len -=
745 sizeof(struct mwifiex_ie_types_header) + rates_size;
746
747 if (ret)
748 break;
749 }
750
751 if (ret)
752 return -1;
753
754 return 0;
755 }
756
757 /*
758 * This function constructs a scan command configuration structure to use
759 * in scan commands.
760 *
761 * Application layer or other functions can invoke network scanning
762 * with a scan configuration supplied in a user scan configuration structure.
763 * This structure is used as the basis of one or many scan command configuration
764 * commands that are sent to the command processing module and eventually to the
765 * firmware.
766 *
767 * This function creates a scan command configuration structure based on the
768 * following user supplied parameters (if present):
769 * - SSID filter
770 * - BSSID filter
771 * - Number of Probes to be sent
772 * - Channel list
773 *
774 * If the SSID or BSSID filter is not present, the filter is disabled/cleared.
775 * If the number of probes is not set, adapter default setting is used.
776 */
777 static void
778 mwifiex_config_scan(struct mwifiex_private *priv,
779 const struct mwifiex_user_scan_cfg *user_scan_in,
780 struct mwifiex_scan_cmd_config *scan_cfg_out,
781 struct mwifiex_ie_types_chan_list_param_set **chan_list_out,
782 struct mwifiex_chan_scan_param_set *scan_chan_list,
783 u8 *max_chan_per_scan, u8 *filtered_scan,
784 u8 *scan_current_only)
785 {
786 struct mwifiex_adapter *adapter = priv->adapter;
787 struct mwifiex_ie_types_num_probes *num_probes_tlv;
788 struct mwifiex_ie_types_wildcard_ssid_params *wildcard_ssid_tlv;
789 u8 *tlv_pos;
790 u32 num_probes;
791 u32 ssid_len;
792 u32 chan_idx;
793 u32 chan_num;
794 u32 scan_type;
795 u16 scan_dur;
796 u8 channel;
797 u8 radio_type;
798 int i;
799 u8 ssid_filter;
800 struct mwifiex_ie_types_htcap *ht_cap;
801
802 /* The tlv_buf_len is calculated for each scan command. The TLVs added
803 in this routine will be preserved since the routine that sends the
804 command will append channelTLVs at *chan_list_out. The difference
805 between the *chan_list_out and the tlv_buf start will be used to
806 calculate the size of anything we add in this routine. */
807 scan_cfg_out->tlv_buf_len = 0;
808
809 /* Running tlv pointer. Assigned to chan_list_out at end of function
810 so later routines know where channels can be added to the command
811 buf */
812 tlv_pos = scan_cfg_out->tlv_buf;
813
814 /* Initialize the scan as un-filtered; the flag is later set to TRUE
815 below if a SSID or BSSID filter is sent in the command */
816 *filtered_scan = false;
817
818 /* Initialize the scan as not being only on the current channel. If
819 the channel list is customized, only contains one channel, and is
820 the active channel, this is set true and data flow is not halted. */
821 *scan_current_only = false;
822
823 if (user_scan_in) {
824
825 /* Default the ssid_filter flag to TRUE, set false under
826 certain wildcard conditions and qualified by the existence
827 of an SSID list before marking the scan as filtered */
828 ssid_filter = true;
829
830 /* Set the BSS type scan filter, use Adapter setting if
831 unset */
832 scan_cfg_out->bss_mode =
833 (user_scan_in->bss_mode ? (u8) user_scan_in->
834 bss_mode : (u8) adapter->scan_mode);
835
836 /* Set the number of probes to send, use Adapter setting
837 if unset */
838 num_probes =
839 (user_scan_in->num_probes ? user_scan_in->
840 num_probes : adapter->scan_probes);
841
842 /*
843 * Set the BSSID filter to the incoming configuration,
844 * if non-zero. If not set, it will remain disabled
845 * (all zeros).
846 */
847 memcpy(scan_cfg_out->specific_bssid,
848 user_scan_in->specific_bssid,
849 sizeof(scan_cfg_out->specific_bssid));
850
851 for (i = 0; i < user_scan_in->num_ssids; i++) {
852 ssid_len = user_scan_in->ssid_list[i].ssid_len;
853
854 wildcard_ssid_tlv =
855 (struct mwifiex_ie_types_wildcard_ssid_params *)
856 tlv_pos;
857 wildcard_ssid_tlv->header.type =
858 cpu_to_le16(TLV_TYPE_WILDCARDSSID);
859 wildcard_ssid_tlv->header.len = cpu_to_le16(
860 (u16) (ssid_len + sizeof(wildcard_ssid_tlv->
861 max_ssid_length)));
862
863 /*
864 * max_ssid_length = 0 tells firmware to perform
865 * specific scan for the SSID filled, whereas
866 * max_ssid_length = IEEE80211_MAX_SSID_LEN is for
867 * wildcard scan.
868 */
869 if (ssid_len)
870 wildcard_ssid_tlv->max_ssid_length = 0;
871 else
872 wildcard_ssid_tlv->max_ssid_length =
873 IEEE80211_MAX_SSID_LEN;
874
875 memcpy(wildcard_ssid_tlv->ssid,
876 user_scan_in->ssid_list[i].ssid, ssid_len);
877
878 tlv_pos += (sizeof(wildcard_ssid_tlv->header)
879 + le16_to_cpu(wildcard_ssid_tlv->header.len));
880
881 dev_dbg(adapter->dev, "info: scan: ssid[%d]: %s, %d\n",
882 i, wildcard_ssid_tlv->ssid,
883 wildcard_ssid_tlv->max_ssid_length);
884
885 /* Empty wildcard ssid with a maxlen will match many or
886 potentially all SSIDs (maxlen == 32), therefore do
887 not treat the scan as
888 filtered. */
889 if (!ssid_len && wildcard_ssid_tlv->max_ssid_length)
890 ssid_filter = false;
891 }
892
893 /*
894 * The default number of channels sent in the command is low to
895 * ensure the response buffer from the firmware does not
896 * truncate scan results. That is not an issue with an SSID
897 * or BSSID filter applied to the scan results in the firmware.
898 */
899 if ((i && ssid_filter) ||
900 !is_zero_ether_addr(scan_cfg_out->specific_bssid))
901 *filtered_scan = true;
902 } else {
903 scan_cfg_out->bss_mode = (u8) adapter->scan_mode;
904 num_probes = adapter->scan_probes;
905 }
906
907 /*
908 * If a specific BSSID or SSID is used, the number of channels in the
909 * scan command will be increased to the absolute maximum.
910 */
911 if (*filtered_scan)
912 *max_chan_per_scan = MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN;
913 else
914 *max_chan_per_scan = MWIFIEX_DEF_CHANNELS_PER_SCAN_CMD;
915
916 /* If the input config or adapter has the number of Probes set,
917 add tlv */
918 if (num_probes) {
919
920 dev_dbg(adapter->dev, "info: scan: num_probes = %d\n",
921 num_probes);
922
923 num_probes_tlv = (struct mwifiex_ie_types_num_probes *) tlv_pos;
924 num_probes_tlv->header.type = cpu_to_le16(TLV_TYPE_NUMPROBES);
925 num_probes_tlv->header.len =
926 cpu_to_le16(sizeof(num_probes_tlv->num_probes));
927 num_probes_tlv->num_probes = cpu_to_le16((u16) num_probes);
928
929 tlv_pos += sizeof(num_probes_tlv->header) +
930 le16_to_cpu(num_probes_tlv->header.len);
931
932 }
933
934 if (ISSUPP_11NENABLED(priv->adapter->fw_cap_info) &&
935 (priv->adapter->config_bands & BAND_GN ||
936 priv->adapter->config_bands & BAND_AN)) {
937 ht_cap = (struct mwifiex_ie_types_htcap *) tlv_pos;
938 memset(ht_cap, 0, sizeof(struct mwifiex_ie_types_htcap));
939 ht_cap->header.type = cpu_to_le16(WLAN_EID_HT_CAPABILITY);
940 ht_cap->header.len =
941 cpu_to_le16(sizeof(struct ieee80211_ht_cap));
942 radio_type =
943 mwifiex_band_to_radio_type(priv->adapter->config_bands);
944 mwifiex_fill_cap_info(priv, radio_type, ht_cap);
945 tlv_pos += sizeof(struct mwifiex_ie_types_htcap);
946 }
947
948 /* Append vendor specific IE TLV */
949 mwifiex_cmd_append_vsie_tlv(priv, MWIFIEX_VSIE_MASK_SCAN, &tlv_pos);
950
951 /*
952 * Set the output for the channel TLV to the address in the tlv buffer
953 * past any TLVs that were added in this function (SSID, num_probes).
954 * Channel TLVs will be added past this for each scan command,
955 * preserving the TLVs that were previously added.
956 */
957 *chan_list_out =
958 (struct mwifiex_ie_types_chan_list_param_set *) tlv_pos;
959
960 if (user_scan_in && user_scan_in->chan_list[0].chan_number) {
961
962 dev_dbg(adapter->dev, "info: Scan: Using supplied channel list\n");
963
964 for (chan_idx = 0;
965 chan_idx < MWIFIEX_USER_SCAN_CHAN_MAX &&
966 user_scan_in->chan_list[chan_idx].chan_number;
967 chan_idx++) {
968
969 channel = user_scan_in->chan_list[chan_idx].chan_number;
970 (scan_chan_list + chan_idx)->chan_number = channel;
971
972 radio_type =
973 user_scan_in->chan_list[chan_idx].radio_type;
974 (scan_chan_list + chan_idx)->radio_type = radio_type;
975
976 scan_type = user_scan_in->chan_list[chan_idx].scan_type;
977
978 if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE)
979 (scan_chan_list +
980 chan_idx)->chan_scan_mode_bitmap
981 |= MWIFIEX_PASSIVE_SCAN;
982 else
983 (scan_chan_list +
984 chan_idx)->chan_scan_mode_bitmap
985 &= ~MWIFIEX_PASSIVE_SCAN;
986
987 if (*filtered_scan)
988 (scan_chan_list +
989 chan_idx)->chan_scan_mode_bitmap
990 |= MWIFIEX_DISABLE_CHAN_FILT;
991
992 if (user_scan_in->chan_list[chan_idx].scan_time) {
993 scan_dur = (u16) user_scan_in->
994 chan_list[chan_idx].scan_time;
995 } else {
996 if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE)
997 scan_dur = adapter->passive_scan_time;
998 else if (*filtered_scan)
999 scan_dur = adapter->specific_scan_time;
1000 else
1001 scan_dur = adapter->active_scan_time;
1002 }
1003
1004 (scan_chan_list + chan_idx)->min_scan_time =
1005 cpu_to_le16(scan_dur);
1006 (scan_chan_list + chan_idx)->max_scan_time =
1007 cpu_to_le16(scan_dur);
1008 }
1009
1010 /* Check if we are only scanning the current channel */
1011 if ((chan_idx == 1) &&
1012 (user_scan_in->chan_list[0].chan_number ==
1013 priv->curr_bss_params.bss_descriptor.channel)) {
1014 *scan_current_only = true;
1015 dev_dbg(adapter->dev,
1016 "info: Scan: Scanning current channel only\n");
1017 }
1018 chan_num = chan_idx;
1019 } else {
1020 dev_dbg(adapter->dev,
1021 "info: Scan: Creating full region channel list\n");
1022 chan_num = mwifiex_scan_create_channel_list(priv, user_scan_in,
1023 scan_chan_list,
1024 *filtered_scan);
1025 }
1026
1027 /*
1028 * In associated state we will reduce the number of channels scanned per
1029 * scan command to avoid any traffic delay/loss. This number is decided
1030 * based on total number of channels to be scanned due to constraints
1031 * of command buffers.
1032 */
1033 if (priv->media_connected) {
1034 if (chan_num < MWIFIEX_LIMIT_1_CHANNEL_PER_SCAN_CMD)
1035 *max_chan_per_scan = 1;
1036 else if (chan_num < MWIFIEX_LIMIT_2_CHANNELS_PER_SCAN_CMD)
1037 *max_chan_per_scan = 2;
1038 else if (chan_num < MWIFIEX_LIMIT_3_CHANNELS_PER_SCAN_CMD)
1039 *max_chan_per_scan = 3;
1040 else
1041 *max_chan_per_scan = 4;
1042 }
1043 }
1044
1045 /*
1046 * This function inspects the scan response buffer for pointers to
1047 * expected TLVs.
1048 *
1049 * TLVs can be included at the end of the scan response BSS information.
1050 *
1051 * Data in the buffer is parsed pointers to TLVs that can potentially
1052 * be passed back in the response.
1053 */
1054 static void
1055 mwifiex_ret_802_11_scan_get_tlv_ptrs(struct mwifiex_adapter *adapter,
1056 struct mwifiex_ie_types_data *tlv,
1057 u32 tlv_buf_size, u32 req_tlv_type,
1058 struct mwifiex_ie_types_data **tlv_data)
1059 {
1060 struct mwifiex_ie_types_data *current_tlv;
1061 u32 tlv_buf_left;
1062 u32 tlv_type;
1063 u32 tlv_len;
1064
1065 current_tlv = tlv;
1066 tlv_buf_left = tlv_buf_size;
1067 *tlv_data = NULL;
1068
1069 dev_dbg(adapter->dev, "info: SCAN_RESP: tlv_buf_size = %d\n",
1070 tlv_buf_size);
1071
1072 while (tlv_buf_left >= sizeof(struct mwifiex_ie_types_header)) {
1073
1074 tlv_type = le16_to_cpu(current_tlv->header.type);
1075 tlv_len = le16_to_cpu(current_tlv->header.len);
1076
1077 if (sizeof(tlv->header) + tlv_len > tlv_buf_left) {
1078 dev_err(adapter->dev, "SCAN_RESP: TLV buffer corrupt\n");
1079 break;
1080 }
1081
1082 if (req_tlv_type == tlv_type) {
1083 switch (tlv_type) {
1084 case TLV_TYPE_TSFTIMESTAMP:
1085 dev_dbg(adapter->dev, "info: SCAN_RESP: TSF "
1086 "timestamp TLV, len = %d\n", tlv_len);
1087 *tlv_data = current_tlv;
1088 break;
1089 case TLV_TYPE_CHANNELBANDLIST:
1090 dev_dbg(adapter->dev, "info: SCAN_RESP: channel"
1091 " band list TLV, len = %d\n", tlv_len);
1092 *tlv_data = current_tlv;
1093 break;
1094 default:
1095 dev_err(adapter->dev,
1096 "SCAN_RESP: unhandled TLV = %d\n",
1097 tlv_type);
1098 /* Give up, this seems corrupted */
1099 return;
1100 }
1101 }
1102
1103 if (*tlv_data)
1104 break;
1105
1106
1107 tlv_buf_left -= (sizeof(tlv->header) + tlv_len);
1108 current_tlv =
1109 (struct mwifiex_ie_types_data *) (current_tlv->data +
1110 tlv_len);
1111
1112 } /* while */
1113 }
1114
1115 /*
1116 * This function parses provided beacon buffer and updates
1117 * respective fields in bss descriptor structure.
1118 */
1119 int mwifiex_update_bss_desc_with_ie(struct mwifiex_adapter *adapter,
1120 struct mwifiex_bssdescriptor *bss_entry)
1121 {
1122 int ret = 0;
1123 u8 element_id;
1124 struct ieee_types_fh_param_set *fh_param_set;
1125 struct ieee_types_ds_param_set *ds_param_set;
1126 struct ieee_types_cf_param_set *cf_param_set;
1127 struct ieee_types_ibss_param_set *ibss_param_set;
1128 u8 *current_ptr;
1129 u8 *rate;
1130 u8 element_len;
1131 u16 total_ie_len;
1132 u8 bytes_to_copy;
1133 u8 rate_size;
1134 u8 found_data_rate_ie;
1135 u32 bytes_left;
1136 struct ieee_types_vendor_specific *vendor_ie;
1137 const u8 wpa_oui[4] = { 0x00, 0x50, 0xf2, 0x01 };
1138 const u8 wmm_oui[4] = { 0x00, 0x50, 0xf2, 0x02 };
1139
1140 found_data_rate_ie = false;
1141 rate_size = 0;
1142 current_ptr = bss_entry->beacon_buf;
1143 bytes_left = bss_entry->beacon_buf_size;
1144
1145 /* Process variable IE */
1146 while (bytes_left >= 2) {
1147 element_id = *current_ptr;
1148 element_len = *(current_ptr + 1);
1149 total_ie_len = element_len + sizeof(struct ieee_types_header);
1150
1151 if (bytes_left < total_ie_len) {
1152 dev_err(adapter->dev, "err: InterpretIE: in processing"
1153 " IE, bytes left < IE length\n");
1154 return -1;
1155 }
1156 switch (element_id) {
1157 case WLAN_EID_SSID:
1158 bss_entry->ssid.ssid_len = element_len;
1159 memcpy(bss_entry->ssid.ssid, (current_ptr + 2),
1160 element_len);
1161 dev_dbg(adapter->dev,
1162 "info: InterpretIE: ssid: %-32s\n",
1163 bss_entry->ssid.ssid);
1164 break;
1165
1166 case WLAN_EID_SUPP_RATES:
1167 memcpy(bss_entry->data_rates, current_ptr + 2,
1168 element_len);
1169 memcpy(bss_entry->supported_rates, current_ptr + 2,
1170 element_len);
1171 rate_size = element_len;
1172 found_data_rate_ie = true;
1173 break;
1174
1175 case WLAN_EID_FH_PARAMS:
1176 fh_param_set =
1177 (struct ieee_types_fh_param_set *) current_ptr;
1178 memcpy(&bss_entry->phy_param_set.fh_param_set,
1179 fh_param_set,
1180 sizeof(struct ieee_types_fh_param_set));
1181 break;
1182
1183 case WLAN_EID_DS_PARAMS:
1184 ds_param_set =
1185 (struct ieee_types_ds_param_set *) current_ptr;
1186
1187 bss_entry->channel = ds_param_set->current_chan;
1188
1189 memcpy(&bss_entry->phy_param_set.ds_param_set,
1190 ds_param_set,
1191 sizeof(struct ieee_types_ds_param_set));
1192 break;
1193
1194 case WLAN_EID_CF_PARAMS:
1195 cf_param_set =
1196 (struct ieee_types_cf_param_set *) current_ptr;
1197 memcpy(&bss_entry->ss_param_set.cf_param_set,
1198 cf_param_set,
1199 sizeof(struct ieee_types_cf_param_set));
1200 break;
1201
1202 case WLAN_EID_IBSS_PARAMS:
1203 ibss_param_set =
1204 (struct ieee_types_ibss_param_set *)
1205 current_ptr;
1206 memcpy(&bss_entry->ss_param_set.ibss_param_set,
1207 ibss_param_set,
1208 sizeof(struct ieee_types_ibss_param_set));
1209 break;
1210
1211 case WLAN_EID_ERP_INFO:
1212 bss_entry->erp_flags = *(current_ptr + 2);
1213 break;
1214
1215 case WLAN_EID_PWR_CONSTRAINT:
1216 bss_entry->local_constraint = *(current_ptr + 2);
1217 bss_entry->sensed_11h = true;
1218 break;
1219
1220 case WLAN_EID_CHANNEL_SWITCH:
1221 bss_entry->chan_sw_ie_present = true;
1222 case WLAN_EID_PWR_CAPABILITY:
1223 case WLAN_EID_TPC_REPORT:
1224 case WLAN_EID_QUIET:
1225 bss_entry->sensed_11h = true;
1226 break;
1227
1228 case WLAN_EID_EXT_SUPP_RATES:
1229 /*
1230 * Only process extended supported rate
1231 * if data rate is already found.
1232 * Data rate IE should come before
1233 * extended supported rate IE
1234 */
1235 if (found_data_rate_ie) {
1236 if ((element_len + rate_size) >
1237 MWIFIEX_SUPPORTED_RATES)
1238 bytes_to_copy =
1239 (MWIFIEX_SUPPORTED_RATES -
1240 rate_size);
1241 else
1242 bytes_to_copy = element_len;
1243
1244 rate = (u8 *) bss_entry->data_rates;
1245 rate += rate_size;
1246 memcpy(rate, current_ptr + 2, bytes_to_copy);
1247
1248 rate = (u8 *) bss_entry->supported_rates;
1249 rate += rate_size;
1250 memcpy(rate, current_ptr + 2, bytes_to_copy);
1251 }
1252 break;
1253
1254 case WLAN_EID_VENDOR_SPECIFIC:
1255 vendor_ie = (struct ieee_types_vendor_specific *)
1256 current_ptr;
1257
1258 if (!memcmp
1259 (vendor_ie->vend_hdr.oui, wpa_oui,
1260 sizeof(wpa_oui))) {
1261 bss_entry->bcn_wpa_ie =
1262 (struct ieee_types_vendor_specific *)
1263 current_ptr;
1264 bss_entry->wpa_offset = (u16)
1265 (current_ptr - bss_entry->beacon_buf);
1266 } else if (!memcmp(vendor_ie->vend_hdr.oui, wmm_oui,
1267 sizeof(wmm_oui))) {
1268 if (total_ie_len ==
1269 sizeof(struct ieee_types_wmm_parameter) ||
1270 total_ie_len ==
1271 sizeof(struct ieee_types_wmm_info))
1272 /*
1273 * Only accept and copy the WMM IE if
1274 * it matches the size expected for the
1275 * WMM Info IE or the WMM Parameter IE.
1276 */
1277 memcpy((u8 *) &bss_entry->wmm_ie,
1278 current_ptr, total_ie_len);
1279 }
1280 break;
1281 case WLAN_EID_RSN:
1282 bss_entry->bcn_rsn_ie =
1283 (struct ieee_types_generic *) current_ptr;
1284 bss_entry->rsn_offset = (u16) (current_ptr -
1285 bss_entry->beacon_buf);
1286 break;
1287 case WLAN_EID_BSS_AC_ACCESS_DELAY:
1288 bss_entry->bcn_wapi_ie =
1289 (struct ieee_types_generic *) current_ptr;
1290 bss_entry->wapi_offset = (u16) (current_ptr -
1291 bss_entry->beacon_buf);
1292 break;
1293 case WLAN_EID_HT_CAPABILITY:
1294 bss_entry->bcn_ht_cap = (struct ieee80211_ht_cap *)
1295 (current_ptr +
1296 sizeof(struct ieee_types_header));
1297 bss_entry->ht_cap_offset = (u16) (current_ptr +
1298 sizeof(struct ieee_types_header) -
1299 bss_entry->beacon_buf);
1300 break;
1301 case WLAN_EID_HT_OPERATION:
1302 bss_entry->bcn_ht_oper =
1303 (struct ieee80211_ht_operation *)(current_ptr +
1304 sizeof(struct ieee_types_header));
1305 bss_entry->ht_info_offset = (u16) (current_ptr +
1306 sizeof(struct ieee_types_header) -
1307 bss_entry->beacon_buf);
1308 break;
1309 case WLAN_EID_VHT_CAPABILITY:
1310 bss_entry->disable_11ac = false;
1311 bss_entry->bcn_vht_cap =
1312 (void *)(current_ptr +
1313 sizeof(struct ieee_types_header));
1314 bss_entry->vht_cap_offset =
1315 (u16)((u8 *)bss_entry->bcn_vht_cap -
1316 bss_entry->beacon_buf);
1317 break;
1318 case WLAN_EID_VHT_OPERATION:
1319 bss_entry->bcn_vht_oper =
1320 (void *)(current_ptr +
1321 sizeof(struct ieee_types_header));
1322 bss_entry->vht_info_offset =
1323 (u16)((u8 *)bss_entry->bcn_vht_oper -
1324 bss_entry->beacon_buf);
1325 break;
1326 case WLAN_EID_BSS_COEX_2040:
1327 bss_entry->bcn_bss_co_2040 = current_ptr +
1328 sizeof(struct ieee_types_header);
1329 bss_entry->bss_co_2040_offset = (u16) (current_ptr +
1330 sizeof(struct ieee_types_header) -
1331 bss_entry->beacon_buf);
1332 break;
1333 case WLAN_EID_EXT_CAPABILITY:
1334 bss_entry->bcn_ext_cap = current_ptr +
1335 sizeof(struct ieee_types_header);
1336 bss_entry->ext_cap_offset = (u16) (current_ptr +
1337 sizeof(struct ieee_types_header) -
1338 bss_entry->beacon_buf);
1339 break;
1340 case WLAN_EID_OPMODE_NOTIF:
1341 bss_entry->oper_mode =
1342 (void *)(current_ptr +
1343 sizeof(struct ieee_types_header));
1344 bss_entry->oper_mode_offset =
1345 (u16)((u8 *)bss_entry->oper_mode -
1346 bss_entry->beacon_buf);
1347 break;
1348 default:
1349 break;
1350 }
1351
1352 current_ptr += element_len + 2;
1353
1354 /* Need to account for IE ID and IE Len */
1355 bytes_left -= (element_len + 2);
1356
1357 } /* while (bytes_left > 2) */
1358 return ret;
1359 }
1360
1361 /*
1362 * This function converts radio type scan parameter to a band configuration
1363 * to be used in join command.
1364 */
1365 static u8
1366 mwifiex_radio_type_to_band(u8 radio_type)
1367 {
1368 switch (radio_type) {
1369 case HostCmd_SCAN_RADIO_TYPE_A:
1370 return BAND_A;
1371 case HostCmd_SCAN_RADIO_TYPE_BG:
1372 default:
1373 return BAND_G;
1374 }
1375 }
1376
1377 /*
1378 * This is an internal function used to start a scan based on an input
1379 * configuration.
1380 *
1381 * This uses the input user scan configuration information when provided in
1382 * order to send the appropriate scan commands to firmware to populate or
1383 * update the internal driver scan table.
1384 */
1385 int mwifiex_scan_networks(struct mwifiex_private *priv,
1386 const struct mwifiex_user_scan_cfg *user_scan_in)
1387 {
1388 int ret;
1389 struct mwifiex_adapter *adapter = priv->adapter;
1390 struct cmd_ctrl_node *cmd_node;
1391 union mwifiex_scan_cmd_config_tlv *scan_cfg_out;
1392 struct mwifiex_ie_types_chan_list_param_set *chan_list_out;
1393 struct mwifiex_chan_scan_param_set *scan_chan_list;
1394 u8 filtered_scan;
1395 u8 scan_current_chan_only;
1396 u8 max_chan_per_scan;
1397 unsigned long flags;
1398
1399 if (adapter->scan_processing) {
1400 dev_err(adapter->dev, "cmd: Scan already in process...\n");
1401 return -EBUSY;
1402 }
1403
1404 if (priv->scan_block) {
1405 dev_err(adapter->dev,
1406 "cmd: Scan is blocked during association...\n");
1407 return -EBUSY;
1408 }
1409
1410 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
1411 adapter->scan_processing = true;
1412 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
1413
1414 scan_cfg_out = kzalloc(sizeof(union mwifiex_scan_cmd_config_tlv),
1415 GFP_KERNEL);
1416 if (!scan_cfg_out) {
1417 ret = -ENOMEM;
1418 goto done;
1419 }
1420
1421 scan_chan_list = kcalloc(MWIFIEX_USER_SCAN_CHAN_MAX,
1422 sizeof(struct mwifiex_chan_scan_param_set),
1423 GFP_KERNEL);
1424 if (!scan_chan_list) {
1425 kfree(scan_cfg_out);
1426 ret = -ENOMEM;
1427 goto done;
1428 }
1429
1430 mwifiex_config_scan(priv, user_scan_in, &scan_cfg_out->config,
1431 &chan_list_out, scan_chan_list, &max_chan_per_scan,
1432 &filtered_scan, &scan_current_chan_only);
1433
1434 ret = mwifiex_scan_channel_list(priv, max_chan_per_scan, filtered_scan,
1435 &scan_cfg_out->config, chan_list_out,
1436 scan_chan_list);
1437
1438 /* Get scan command from scan_pending_q and put to cmd_pending_q */
1439 if (!ret) {
1440 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
1441 if (!list_empty(&adapter->scan_pending_q)) {
1442 cmd_node = list_first_entry(&adapter->scan_pending_q,
1443 struct cmd_ctrl_node, list);
1444 list_del(&cmd_node->list);
1445 spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
1446 flags);
1447 mwifiex_insert_cmd_to_pending_q(adapter, cmd_node,
1448 true);
1449 queue_work(adapter->workqueue, &adapter->main_work);
1450
1451 /* Perform internal scan synchronously */
1452 if (!priv->scan_request) {
1453 dev_dbg(adapter->dev, "wait internal scan\n");
1454 mwifiex_wait_queue_complete(adapter, cmd_node);
1455 }
1456 } else {
1457 spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
1458 flags);
1459 }
1460 }
1461
1462 kfree(scan_cfg_out);
1463 kfree(scan_chan_list);
1464 done:
1465 if (ret) {
1466 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
1467 adapter->scan_processing = false;
1468 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
1469 }
1470 return ret;
1471 }
1472
1473 /*
1474 * This function prepares a scan command to be sent to the firmware.
1475 *
1476 * This uses the scan command configuration sent to the command processing
1477 * module in command preparation stage to configure a scan command structure
1478 * to send to firmware.
1479 *
1480 * The fixed fields specifying the BSS type and BSSID filters as well as a
1481 * variable number/length of TLVs are sent in the command to firmware.
1482 *
1483 * Preparation also includes -
1484 * - Setting command ID, and proper size
1485 * - Ensuring correct endian-ness
1486 */
1487 int mwifiex_cmd_802_11_scan(struct host_cmd_ds_command *cmd,
1488 struct mwifiex_scan_cmd_config *scan_cfg)
1489 {
1490 struct host_cmd_ds_802_11_scan *scan_cmd = &cmd->params.scan;
1491
1492 /* Set fixed field variables in scan command */
1493 scan_cmd->bss_mode = scan_cfg->bss_mode;
1494 memcpy(scan_cmd->bssid, scan_cfg->specific_bssid,
1495 sizeof(scan_cmd->bssid));
1496 memcpy(scan_cmd->tlv_buffer, scan_cfg->tlv_buf, scan_cfg->tlv_buf_len);
1497
1498 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_SCAN);
1499
1500 /* Size is equal to the sizeof(fixed portions) + the TLV len + header */
1501 cmd->size = cpu_to_le16((u16) (sizeof(scan_cmd->bss_mode)
1502 + sizeof(scan_cmd->bssid)
1503 + scan_cfg->tlv_buf_len + S_DS_GEN));
1504
1505 return 0;
1506 }
1507
1508 /*
1509 * This function checks compatibility of requested network with current
1510 * driver settings.
1511 */
1512 int mwifiex_check_network_compatibility(struct mwifiex_private *priv,
1513 struct mwifiex_bssdescriptor *bss_desc)
1514 {
1515 int ret = -1;
1516
1517 if (!bss_desc)
1518 return -1;
1519
1520 if ((mwifiex_get_cfp(priv, (u8) bss_desc->bss_band,
1521 (u16) bss_desc->channel, 0))) {
1522 switch (priv->bss_mode) {
1523 case NL80211_IFTYPE_STATION:
1524 case NL80211_IFTYPE_ADHOC:
1525 ret = mwifiex_is_network_compatible(priv, bss_desc,
1526 priv->bss_mode);
1527 if (ret)
1528 dev_err(priv->adapter->dev,
1529 "Incompatible network settings\n");
1530 break;
1531 default:
1532 ret = 0;
1533 }
1534 }
1535
1536 return ret;
1537 }
1538
1539 static int mwifiex_update_curr_bss_params(struct mwifiex_private *priv,
1540 struct cfg80211_bss *bss)
1541 {
1542 struct mwifiex_bssdescriptor *bss_desc;
1543 int ret;
1544 unsigned long flags;
1545
1546 /* Allocate and fill new bss descriptor */
1547 bss_desc = kzalloc(sizeof(struct mwifiex_bssdescriptor), GFP_KERNEL);
1548 if (!bss_desc)
1549 return -ENOMEM;
1550
1551 ret = mwifiex_fill_new_bss_desc(priv, bss, bss_desc);
1552 if (ret)
1553 goto done;
1554
1555 ret = mwifiex_check_network_compatibility(priv, bss_desc);
1556 if (ret)
1557 goto done;
1558
1559 spin_lock_irqsave(&priv->curr_bcn_buf_lock, flags);
1560 /* Make a copy of current BSSID descriptor */
1561 memcpy(&priv->curr_bss_params.bss_descriptor, bss_desc,
1562 sizeof(priv->curr_bss_params.bss_descriptor));
1563
1564 /* The contents of beacon_ie will be copied to its own buffer
1565 * in mwifiex_save_curr_bcn()
1566 */
1567 mwifiex_save_curr_bcn(priv);
1568 spin_unlock_irqrestore(&priv->curr_bcn_buf_lock, flags);
1569
1570 done:
1571 /* beacon_ie buffer was allocated in function
1572 * mwifiex_fill_new_bss_desc(). Free it now.
1573 */
1574 kfree(bss_desc->beacon_buf);
1575 kfree(bss_desc);
1576 return 0;
1577 }
1578
1579 /*
1580 * This function handles the command response of scan.
1581 *
1582 * The response buffer for the scan command has the following
1583 * memory layout:
1584 *
1585 * .-------------------------------------------------------------.
1586 * | Header (4 * sizeof(t_u16)): Standard command response hdr |
1587 * .-------------------------------------------------------------.
1588 * | BufSize (t_u16) : sizeof the BSS Description data |
1589 * .-------------------------------------------------------------.
1590 * | NumOfSet (t_u8) : Number of BSS Descs returned |
1591 * .-------------------------------------------------------------.
1592 * | BSSDescription data (variable, size given in BufSize) |
1593 * .-------------------------------------------------------------.
1594 * | TLV data (variable, size calculated using Header->Size, |
1595 * | BufSize and sizeof the fixed fields above) |
1596 * .-------------------------------------------------------------.
1597 */
1598 int mwifiex_ret_802_11_scan(struct mwifiex_private *priv,
1599 struct host_cmd_ds_command *resp)
1600 {
1601 int ret = 0;
1602 struct mwifiex_adapter *adapter = priv->adapter;
1603 struct cmd_ctrl_node *cmd_node;
1604 struct host_cmd_ds_802_11_scan_rsp *scan_rsp;
1605 struct mwifiex_ie_types_data *tlv_data;
1606 struct mwifiex_ie_types_tsf_timestamp *tsf_tlv;
1607 u8 *bss_info;
1608 u32 scan_resp_size;
1609 u32 bytes_left;
1610 u32 idx;
1611 u32 tlv_buf_size;
1612 struct mwifiex_chan_freq_power *cfp;
1613 struct mwifiex_ie_types_chan_band_list_param_set *chan_band_tlv;
1614 struct chan_band_param_set *chan_band;
1615 u8 is_bgscan_resp;
1616 unsigned long flags;
1617 struct cfg80211_bss *bss;
1618
1619 is_bgscan_resp = (le16_to_cpu(resp->command)
1620 == HostCmd_CMD_802_11_BG_SCAN_QUERY);
1621 if (is_bgscan_resp)
1622 scan_rsp = &resp->params.bg_scan_query_resp.scan_resp;
1623 else
1624 scan_rsp = &resp->params.scan_resp;
1625
1626
1627 if (scan_rsp->number_of_sets > MWIFIEX_MAX_AP) {
1628 dev_err(adapter->dev, "SCAN_RESP: too many AP returned (%d)\n",
1629 scan_rsp->number_of_sets);
1630 ret = -1;
1631 goto check_next_scan;
1632 }
1633
1634 /* Check csa channel expiry before parsing scan response */
1635 mwifiex_11h_get_csa_closed_channel(priv);
1636
1637 bytes_left = le16_to_cpu(scan_rsp->bss_descript_size);
1638 dev_dbg(adapter->dev, "info: SCAN_RESP: bss_descript_size %d\n",
1639 bytes_left);
1640
1641 scan_resp_size = le16_to_cpu(resp->size);
1642
1643 dev_dbg(adapter->dev,
1644 "info: SCAN_RESP: returned %d APs before parsing\n",
1645 scan_rsp->number_of_sets);
1646
1647 bss_info = scan_rsp->bss_desc_and_tlv_buffer;
1648
1649 /*
1650 * The size of the TLV buffer is equal to the entire command response
1651 * size (scan_resp_size) minus the fixed fields (sizeof()'s), the
1652 * BSS Descriptions (bss_descript_size as bytesLef) and the command
1653 * response header (S_DS_GEN)
1654 */
1655 tlv_buf_size = scan_resp_size - (bytes_left
1656 + sizeof(scan_rsp->bss_descript_size)
1657 + sizeof(scan_rsp->number_of_sets)
1658 + S_DS_GEN);
1659
1660 tlv_data = (struct mwifiex_ie_types_data *) (scan_rsp->
1661 bss_desc_and_tlv_buffer +
1662 bytes_left);
1663
1664 /* Search the TLV buffer space in the scan response for any valid
1665 TLVs */
1666 mwifiex_ret_802_11_scan_get_tlv_ptrs(adapter, tlv_data, tlv_buf_size,
1667 TLV_TYPE_TSFTIMESTAMP,
1668 (struct mwifiex_ie_types_data **)
1669 &tsf_tlv);
1670
1671 /* Search the TLV buffer space in the scan response for any valid
1672 TLVs */
1673 mwifiex_ret_802_11_scan_get_tlv_ptrs(adapter, tlv_data, tlv_buf_size,
1674 TLV_TYPE_CHANNELBANDLIST,
1675 (struct mwifiex_ie_types_data **)
1676 &chan_band_tlv);
1677
1678 for (idx = 0; idx < scan_rsp->number_of_sets && bytes_left; idx++) {
1679 u8 bssid[ETH_ALEN];
1680 s32 rssi;
1681 const u8 *ie_buf;
1682 size_t ie_len;
1683 u16 channel = 0;
1684 u64 fw_tsf = 0;
1685 u16 beacon_size = 0;
1686 u32 curr_bcn_bytes;
1687 u32 freq;
1688 u16 beacon_period;
1689 u16 cap_info_bitmap;
1690 u8 *current_ptr;
1691 u64 timestamp;
1692 struct mwifiex_bcn_param *bcn_param;
1693 struct mwifiex_bss_priv *bss_priv;
1694
1695 if (bytes_left >= sizeof(beacon_size)) {
1696 /* Extract & convert beacon size from command buffer */
1697 memcpy(&beacon_size, bss_info, sizeof(beacon_size));
1698 bytes_left -= sizeof(beacon_size);
1699 bss_info += sizeof(beacon_size);
1700 }
1701
1702 if (!beacon_size || beacon_size > bytes_left) {
1703 bss_info += bytes_left;
1704 bytes_left = 0;
1705 ret = -1;
1706 goto check_next_scan;
1707 }
1708
1709 /* Initialize the current working beacon pointer for this BSS
1710 * iteration */
1711 current_ptr = bss_info;
1712
1713 /* Advance the return beacon pointer past the current beacon */
1714 bss_info += beacon_size;
1715 bytes_left -= beacon_size;
1716
1717 curr_bcn_bytes = beacon_size;
1718
1719 /*
1720 * First 5 fields are bssid, RSSI, time stamp, beacon interval,
1721 * and capability information
1722 */
1723 if (curr_bcn_bytes < sizeof(struct mwifiex_bcn_param)) {
1724 dev_err(adapter->dev,
1725 "InterpretIE: not enough bytes left\n");
1726 continue;
1727 }
1728 bcn_param = (struct mwifiex_bcn_param *)current_ptr;
1729 current_ptr += sizeof(*bcn_param);
1730 curr_bcn_bytes -= sizeof(*bcn_param);
1731
1732 memcpy(bssid, bcn_param->bssid, ETH_ALEN);
1733
1734 rssi = (s32) bcn_param->rssi;
1735 rssi = (-rssi) * 100; /* Convert dBm to mBm */
1736 dev_dbg(adapter->dev, "info: InterpretIE: RSSI=%d\n", rssi);
1737
1738 timestamp = le64_to_cpu(bcn_param->timestamp);
1739 beacon_period = le16_to_cpu(bcn_param->beacon_period);
1740
1741 cap_info_bitmap = le16_to_cpu(bcn_param->cap_info_bitmap);
1742 dev_dbg(adapter->dev, "info: InterpretIE: capabilities=0x%X\n",
1743 cap_info_bitmap);
1744
1745 /* Rest of the current buffer are IE's */
1746 ie_buf = current_ptr;
1747 ie_len = curr_bcn_bytes;
1748 dev_dbg(adapter->dev,
1749 "info: InterpretIE: IELength for this AP = %d\n",
1750 curr_bcn_bytes);
1751
1752 while (curr_bcn_bytes >= sizeof(struct ieee_types_header)) {
1753 u8 element_id, element_len;
1754
1755 element_id = *current_ptr;
1756 element_len = *(current_ptr + 1);
1757 if (curr_bcn_bytes < element_len +
1758 sizeof(struct ieee_types_header)) {
1759 dev_err(priv->adapter->dev,
1760 "%s: bytes left < IE length\n",
1761 __func__);
1762 goto check_next_scan;
1763 }
1764 if (element_id == WLAN_EID_DS_PARAMS) {
1765 channel = *(current_ptr + sizeof(struct ieee_types_header));
1766 break;
1767 }
1768
1769 current_ptr += element_len +
1770 sizeof(struct ieee_types_header);
1771 curr_bcn_bytes -= element_len +
1772 sizeof(struct ieee_types_header);
1773 }
1774
1775 /*
1776 * If the TSF TLV was appended to the scan results, save this
1777 * entry's TSF value in the fw_tsf field. It is the firmware's
1778 * TSF value at the time the beacon or probe response was
1779 * received.
1780 */
1781 if (tsf_tlv)
1782 memcpy(&fw_tsf, &tsf_tlv->tsf_data[idx * TSF_DATA_SIZE],
1783 sizeof(fw_tsf));
1784
1785 if (channel) {
1786 struct ieee80211_channel *chan;
1787 u8 band;
1788
1789 /* Skip entry if on csa closed channel */
1790 if (channel == priv->csa_chan) {
1791 dev_dbg(adapter->dev,
1792 "Dropping entry on csa closed channel\n");
1793 continue;
1794 }
1795
1796 band = BAND_G;
1797 if (chan_band_tlv) {
1798 chan_band =
1799 &chan_band_tlv->chan_band_param[idx];
1800 band = mwifiex_radio_type_to_band(
1801 chan_band->radio_type
1802 & (BIT(0) | BIT(1)));
1803 }
1804
1805 cfp = mwifiex_get_cfp(priv, band, channel, 0);
1806
1807 freq = cfp ? cfp->freq : 0;
1808
1809 chan = ieee80211_get_channel(priv->wdev->wiphy, freq);
1810
1811 if (chan && !(chan->flags & IEEE80211_CHAN_DISABLED)) {
1812 bss = cfg80211_inform_bss(priv->wdev->wiphy,
1813 chan, bssid, timestamp,
1814 cap_info_bitmap, beacon_period,
1815 ie_buf, ie_len, rssi, GFP_KERNEL);
1816 bss_priv = (struct mwifiex_bss_priv *)bss->priv;
1817 bss_priv->band = band;
1818 bss_priv->fw_tsf = fw_tsf;
1819 if (priv->media_connected &&
1820 !memcmp(bssid,
1821 priv->curr_bss_params.bss_descriptor
1822 .mac_address, ETH_ALEN))
1823 mwifiex_update_curr_bss_params(priv,
1824 bss);
1825 cfg80211_put_bss(priv->wdev->wiphy, bss);
1826 }
1827 } else {
1828 dev_dbg(adapter->dev, "missing BSS channel IE\n");
1829 }
1830 }
1831
1832 check_next_scan:
1833 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
1834 if (list_empty(&adapter->scan_pending_q)) {
1835 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
1836 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
1837 adapter->scan_processing = false;
1838 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
1839
1840 /* Need to indicate IOCTL complete */
1841 if (adapter->curr_cmd->wait_q_enabled) {
1842 adapter->cmd_wait_q.status = 0;
1843 if (!priv->scan_request) {
1844 dev_dbg(adapter->dev,
1845 "complete internal scan\n");
1846 mwifiex_complete_cmd(adapter,
1847 adapter->curr_cmd);
1848 }
1849 }
1850 if (priv->report_scan_result)
1851 priv->report_scan_result = false;
1852
1853 if (priv->scan_request) {
1854 dev_dbg(adapter->dev, "info: notifying scan done\n");
1855 cfg80211_scan_done(priv->scan_request, 0);
1856 priv->scan_request = NULL;
1857 } else {
1858 priv->scan_aborting = false;
1859 dev_dbg(adapter->dev, "info: scan already aborted\n");
1860 }
1861 } else {
1862 if ((priv->scan_aborting && !priv->scan_request) ||
1863 priv->scan_block) {
1864 spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
1865 flags);
1866 adapter->scan_delay_cnt = MWIFIEX_MAX_SCAN_DELAY_CNT;
1867 mod_timer(&priv->scan_delay_timer, jiffies);
1868 dev_dbg(priv->adapter->dev,
1869 "info: %s: triggerring scan abort\n", __func__);
1870 } else if (!mwifiex_wmm_lists_empty(adapter) &&
1871 (priv->scan_request && (priv->scan_request->flags &
1872 NL80211_SCAN_FLAG_LOW_PRIORITY))) {
1873 spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
1874 flags);
1875 adapter->scan_delay_cnt = 1;
1876 mod_timer(&priv->scan_delay_timer, jiffies +
1877 msecs_to_jiffies(MWIFIEX_SCAN_DELAY_MSEC));
1878 dev_dbg(priv->adapter->dev,
1879 "info: %s: deferring scan\n", __func__);
1880 } else {
1881 /* Get scan command from scan_pending_q and put to
1882 cmd_pending_q */
1883 cmd_node = list_first_entry(&adapter->scan_pending_q,
1884 struct cmd_ctrl_node, list);
1885 list_del(&cmd_node->list);
1886 spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
1887 flags);
1888 mwifiex_insert_cmd_to_pending_q(adapter, cmd_node,
1889 true);
1890 }
1891 }
1892
1893 return ret;
1894 }
1895
1896 /*
1897 * This function prepares command for background scan query.
1898 *
1899 * Preparation includes -
1900 * - Setting command ID and proper size
1901 * - Setting background scan flush parameter
1902 * - Ensuring correct endian-ness
1903 */
1904 int mwifiex_cmd_802_11_bg_scan_query(struct host_cmd_ds_command *cmd)
1905 {
1906 struct host_cmd_ds_802_11_bg_scan_query *bg_query =
1907 &cmd->params.bg_scan_query;
1908
1909 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_BG_SCAN_QUERY);
1910 cmd->size = cpu_to_le16(sizeof(struct host_cmd_ds_802_11_bg_scan_query)
1911 + S_DS_GEN);
1912
1913 bg_query->flush = 1;
1914
1915 return 0;
1916 }
1917
1918 /*
1919 * This function inserts scan command node to the scan pending queue.
1920 */
1921 void
1922 mwifiex_queue_scan_cmd(struct mwifiex_private *priv,
1923 struct cmd_ctrl_node *cmd_node)
1924 {
1925 struct mwifiex_adapter *adapter = priv->adapter;
1926 unsigned long flags;
1927
1928 cmd_node->wait_q_enabled = true;
1929 cmd_node->condition = &adapter->scan_wait_q_woken;
1930 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
1931 list_add_tail(&cmd_node->list, &adapter->scan_pending_q);
1932 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
1933 }
1934
1935 /*
1936 * This function sends a scan command for all available channels to the
1937 * firmware, filtered on a specific SSID.
1938 */
1939 static int mwifiex_scan_specific_ssid(struct mwifiex_private *priv,
1940 struct cfg80211_ssid *req_ssid)
1941 {
1942 struct mwifiex_adapter *adapter = priv->adapter;
1943 int ret;
1944 struct mwifiex_user_scan_cfg *scan_cfg;
1945
1946 if (adapter->scan_processing) {
1947 dev_err(adapter->dev, "cmd: Scan already in process...\n");
1948 return -EBUSY;
1949 }
1950
1951 if (priv->scan_block) {
1952 dev_err(adapter->dev,
1953 "cmd: Scan is blocked during association...\n");
1954 return -EBUSY;
1955 }
1956
1957 scan_cfg = kzalloc(sizeof(struct mwifiex_user_scan_cfg), GFP_KERNEL);
1958 if (!scan_cfg)
1959 return -ENOMEM;
1960
1961 scan_cfg->ssid_list = req_ssid;
1962 scan_cfg->num_ssids = 1;
1963
1964 ret = mwifiex_scan_networks(priv, scan_cfg);
1965
1966 kfree(scan_cfg);
1967 return ret;
1968 }
1969
1970 /*
1971 * Sends IOCTL request to start a scan.
1972 *
1973 * This function allocates the IOCTL request buffer, fills it
1974 * with requisite parameters and calls the IOCTL handler.
1975 *
1976 * Scan command can be issued for both normal scan and specific SSID
1977 * scan, depending upon whether an SSID is provided or not.
1978 */
1979 int mwifiex_request_scan(struct mwifiex_private *priv,
1980 struct cfg80211_ssid *req_ssid)
1981 {
1982 int ret;
1983
1984 if (down_interruptible(&priv->async_sem)) {
1985 dev_err(priv->adapter->dev, "%s: acquire semaphore\n",
1986 __func__);
1987 return -1;
1988 }
1989
1990 priv->adapter->scan_wait_q_woken = false;
1991
1992 if (req_ssid && req_ssid->ssid_len != 0)
1993 /* Specific SSID scan */
1994 ret = mwifiex_scan_specific_ssid(priv, req_ssid);
1995 else
1996 /* Normal scan */
1997 ret = mwifiex_scan_networks(priv, NULL);
1998
1999 up(&priv->async_sem);
2000
2001 return ret;
2002 }
2003
2004 /*
2005 * This function appends the vendor specific IE TLV to a buffer.
2006 */
2007 int
2008 mwifiex_cmd_append_vsie_tlv(struct mwifiex_private *priv,
2009 u16 vsie_mask, u8 **buffer)
2010 {
2011 int id, ret_len = 0;
2012 struct mwifiex_ie_types_vendor_param_set *vs_param_set;
2013
2014 if (!buffer)
2015 return 0;
2016 if (!(*buffer))
2017 return 0;
2018
2019 /*
2020 * Traverse through the saved vendor specific IE array and append
2021 * the selected(scan/assoc/adhoc) IE as TLV to the command
2022 */
2023 for (id = 0; id < MWIFIEX_MAX_VSIE_NUM; id++) {
2024 if (priv->vs_ie[id].mask & vsie_mask) {
2025 vs_param_set =
2026 (struct mwifiex_ie_types_vendor_param_set *)
2027 *buffer;
2028 vs_param_set->header.type =
2029 cpu_to_le16(TLV_TYPE_PASSTHROUGH);
2030 vs_param_set->header.len =
2031 cpu_to_le16((((u16) priv->vs_ie[id].ie[1])
2032 & 0x00FF) + 2);
2033 memcpy(vs_param_set->ie, priv->vs_ie[id].ie,
2034 le16_to_cpu(vs_param_set->header.len));
2035 *buffer += le16_to_cpu(vs_param_set->header.len) +
2036 sizeof(struct mwifiex_ie_types_header);
2037 ret_len += le16_to_cpu(vs_param_set->header.len) +
2038 sizeof(struct mwifiex_ie_types_header);
2039 }
2040 }
2041 return ret_len;
2042 }
2043
2044 /*
2045 * This function saves a beacon buffer of the current BSS descriptor.
2046 *
2047 * The current beacon buffer is saved so that it can be restored in the
2048 * following cases that makes the beacon buffer not to contain the current
2049 * ssid's beacon buffer.
2050 * - The current ssid was not found somehow in the last scan.
2051 * - The current ssid was the last entry of the scan table and overloaded.
2052 */
2053 void
2054 mwifiex_save_curr_bcn(struct mwifiex_private *priv)
2055 {
2056 struct mwifiex_bssdescriptor *curr_bss =
2057 &priv->curr_bss_params.bss_descriptor;
2058
2059 if (!curr_bss->beacon_buf_size)
2060 return;
2061
2062 /* allocate beacon buffer at 1st time; or if it's size has changed */
2063 if (!priv->curr_bcn_buf ||
2064 priv->curr_bcn_size != curr_bss->beacon_buf_size) {
2065 priv->curr_bcn_size = curr_bss->beacon_buf_size;
2066
2067 kfree(priv->curr_bcn_buf);
2068 priv->curr_bcn_buf = kmalloc(curr_bss->beacon_buf_size,
2069 GFP_ATOMIC);
2070 if (!priv->curr_bcn_buf)
2071 return;
2072 }
2073
2074 memcpy(priv->curr_bcn_buf, curr_bss->beacon_buf,
2075 curr_bss->beacon_buf_size);
2076 dev_dbg(priv->adapter->dev, "info: current beacon saved %d\n",
2077 priv->curr_bcn_size);
2078
2079 curr_bss->beacon_buf = priv->curr_bcn_buf;
2080
2081 /* adjust the pointers in the current BSS descriptor */
2082 if (curr_bss->bcn_wpa_ie)
2083 curr_bss->bcn_wpa_ie =
2084 (struct ieee_types_vendor_specific *)
2085 (curr_bss->beacon_buf +
2086 curr_bss->wpa_offset);
2087
2088 if (curr_bss->bcn_rsn_ie)
2089 curr_bss->bcn_rsn_ie = (struct ieee_types_generic *)
2090 (curr_bss->beacon_buf +
2091 curr_bss->rsn_offset);
2092
2093 if (curr_bss->bcn_ht_cap)
2094 curr_bss->bcn_ht_cap = (struct ieee80211_ht_cap *)
2095 (curr_bss->beacon_buf +
2096 curr_bss->ht_cap_offset);
2097
2098 if (curr_bss->bcn_ht_oper)
2099 curr_bss->bcn_ht_oper = (struct ieee80211_ht_operation *)
2100 (curr_bss->beacon_buf +
2101 curr_bss->ht_info_offset);
2102
2103 if (curr_bss->bcn_vht_cap)
2104 curr_bss->bcn_ht_cap = (void *)(curr_bss->beacon_buf +
2105 curr_bss->vht_cap_offset);
2106
2107 if (curr_bss->bcn_vht_oper)
2108 curr_bss->bcn_ht_oper = (void *)(curr_bss->beacon_buf +
2109 curr_bss->vht_info_offset);
2110
2111 if (curr_bss->bcn_bss_co_2040)
2112 curr_bss->bcn_bss_co_2040 =
2113 (curr_bss->beacon_buf + curr_bss->bss_co_2040_offset);
2114
2115 if (curr_bss->bcn_ext_cap)
2116 curr_bss->bcn_ext_cap = curr_bss->beacon_buf +
2117 curr_bss->ext_cap_offset;
2118
2119 if (curr_bss->oper_mode)
2120 curr_bss->oper_mode = (void *)(curr_bss->beacon_buf +
2121 curr_bss->oper_mode_offset);
2122 }
2123
2124 /*
2125 * This function frees the current BSS descriptor beacon buffer.
2126 */
2127 void
2128 mwifiex_free_curr_bcn(struct mwifiex_private *priv)
2129 {
2130 kfree(priv->curr_bcn_buf);
2131 priv->curr_bcn_buf = NULL;
2132 }
Linux kernel - Deliverables
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