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mwifiex: remove unnecessary struct mwifiex_802_11_ssid
[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_CHANNELS_PER_SCAN_CMD 4
32
33 /* Memory needed to store a max sized Channel List TLV for a firmware scan */
34 #define CHAN_TLV_MAX_SIZE (sizeof(struct mwifiex_ie_types_header) \
35 + (MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN \
36 *sizeof(struct mwifiex_chan_scan_param_set)))
37
38 /* Memory needed to store supported rate */
39 #define RATE_TLV_MAX_SIZE (sizeof(struct mwifiex_ie_types_rates_param_set) \
40 + HOSTCMD_SUPPORTED_RATES)
41
42 /* Memory needed to store a max number/size WildCard SSID TLV for a firmware
43 scan */
44 #define WILDCARD_SSID_TLV_MAX_SIZE \
45 (MWIFIEX_MAX_SSID_LIST_LENGTH * \
46 (sizeof(struct mwifiex_ie_types_wildcard_ssid_params) \
47 + IEEE80211_MAX_SSID_LEN))
48
49 /* Maximum memory needed for a mwifiex_scan_cmd_config with all TLVs at max */
50 #define MAX_SCAN_CFG_ALLOC (sizeof(struct mwifiex_scan_cmd_config) \
51 + sizeof(struct mwifiex_ie_types_num_probes) \
52 + sizeof(struct mwifiex_ie_types_htcap) \
53 + CHAN_TLV_MAX_SIZE \
54 + RATE_TLV_MAX_SIZE \
55 + WILDCARD_SSID_TLV_MAX_SIZE)
56
57
58 union mwifiex_scan_cmd_config_tlv {
59 /* Scan configuration (variable length) */
60 struct mwifiex_scan_cmd_config config;
61 /* Max allocated block */
62 u8 config_alloc_buf[MAX_SCAN_CFG_ALLOC];
63 };
64
65 enum cipher_suite {
66 CIPHER_SUITE_TKIP,
67 CIPHER_SUITE_CCMP,
68 CIPHER_SUITE_MAX
69 };
70 static u8 mwifiex_wpa_oui[CIPHER_SUITE_MAX][4] = {
71 { 0x00, 0x50, 0xf2, 0x02 }, /* TKIP */
72 { 0x00, 0x50, 0xf2, 0x04 }, /* AES */
73 };
74 static u8 mwifiex_rsn_oui[CIPHER_SUITE_MAX][4] = {
75 { 0x00, 0x0f, 0xac, 0x02 }, /* TKIP */
76 { 0x00, 0x0f, 0xac, 0x04 }, /* AES */
77 };
78
79 /*
80 * This function parses a given IE for a given OUI.
81 *
82 * This is used to parse a WPA/RSN IE to find if it has
83 * a given oui in PTK.
84 */
85 static u8
86 mwifiex_search_oui_in_ie(struct ie_body *iebody, u8 *oui)
87 {
88 u8 count;
89
90 count = iebody->ptk_cnt[0];
91
92 /* There could be multiple OUIs for PTK hence
93 1) Take the length.
94 2) Check all the OUIs for AES.
95 3) If one of them is AES then pass success. */
96 while (count) {
97 if (!memcmp(iebody->ptk_body, oui, sizeof(iebody->ptk_body)))
98 return MWIFIEX_OUI_PRESENT;
99
100 --count;
101 if (count)
102 iebody = (struct ie_body *) ((u8 *) iebody +
103 sizeof(iebody->ptk_body));
104 }
105
106 pr_debug("info: %s: OUI is not found in PTK\n", __func__);
107 return MWIFIEX_OUI_NOT_PRESENT;
108 }
109
110 /*
111 * This function checks if a given OUI is present in a RSN IE.
112 *
113 * The function first checks if a RSN IE is present or not in the
114 * BSS descriptor. It tries to locate the OUI only if such an IE is
115 * present.
116 */
117 static u8
118 mwifiex_is_rsn_oui_present(struct mwifiex_bssdescriptor *bss_desc, u32 cipher)
119 {
120 u8 *oui;
121 struct ie_body *iebody;
122 u8 ret = MWIFIEX_OUI_NOT_PRESENT;
123
124 if (((bss_desc->bcn_rsn_ie) && ((*(bss_desc->bcn_rsn_ie)).
125 ieee_hdr.element_id == WLAN_EID_RSN))) {
126 iebody = (struct ie_body *)
127 (((u8 *) bss_desc->bcn_rsn_ie->data) +
128 RSN_GTK_OUI_OFFSET);
129 oui = &mwifiex_rsn_oui[cipher][0];
130 ret = mwifiex_search_oui_in_ie(iebody, oui);
131 if (ret)
132 return ret;
133 }
134 return ret;
135 }
136
137 /*
138 * This function checks if a given OUI is present in a WPA IE.
139 *
140 * The function first checks if a WPA IE is present or not in the
141 * BSS descriptor. It tries to locate the OUI only if such an IE is
142 * present.
143 */
144 static u8
145 mwifiex_is_wpa_oui_present(struct mwifiex_bssdescriptor *bss_desc, u32 cipher)
146 {
147 u8 *oui;
148 struct ie_body *iebody;
149 u8 ret = MWIFIEX_OUI_NOT_PRESENT;
150
151 if (((bss_desc->bcn_wpa_ie) && ((*(bss_desc->bcn_wpa_ie)).
152 vend_hdr.element_id == WLAN_EID_WPA))) {
153 iebody = (struct ie_body *) bss_desc->bcn_wpa_ie->data;
154 oui = &mwifiex_wpa_oui[cipher][0];
155 ret = mwifiex_search_oui_in_ie(iebody, oui);
156 if (ret)
157 return ret;
158 }
159 return ret;
160 }
161
162 /*
163 * This function compares two SSIDs and checks if they match.
164 */
165 s32
166 mwifiex_ssid_cmp(struct cfg80211_ssid *ssid1, struct cfg80211_ssid *ssid2)
167 {
168 if (!ssid1 || !ssid2 || (ssid1->ssid_len != ssid2->ssid_len))
169 return -1;
170 return memcmp(ssid1->ssid, ssid2->ssid, ssid1->ssid_len);
171 }
172
173 /*
174 * This function checks if wapi is enabled in driver and scanned network is
175 * compatible with it.
176 */
177 static bool
178 mwifiex_is_network_compatible_for_wapi(struct mwifiex_private *priv,
179 struct mwifiex_bssdescriptor *bss_desc)
180 {
181 if (priv->sec_info.wapi_enabled &&
182 (bss_desc->bcn_wapi_ie &&
183 ((*(bss_desc->bcn_wapi_ie)).ieee_hdr.element_id ==
184 WLAN_EID_BSS_AC_ACCESS_DELAY))) {
185 return true;
186 }
187 return false;
188 }
189
190 /*
191 * This function checks if driver is configured with no security mode and
192 * scanned network is compatible with it.
193 */
194 static bool
195 mwifiex_is_network_compatible_for_no_sec(struct mwifiex_private *priv,
196 struct mwifiex_bssdescriptor *bss_desc)
197 {
198 if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
199 !priv->sec_info.wpa2_enabled && ((!bss_desc->bcn_wpa_ie) ||
200 ((*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id !=
201 WLAN_EID_WPA))
202 && ((!bss_desc->bcn_rsn_ie) ||
203 ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id !=
204 WLAN_EID_RSN))
205 && !priv->sec_info.encryption_mode
206 && !bss_desc->privacy) {
207 return true;
208 }
209 return false;
210 }
211
212 /*
213 * This function checks if static WEP is enabled in driver and scanned network
214 * is compatible with it.
215 */
216 static bool
217 mwifiex_is_network_compatible_for_static_wep(struct mwifiex_private *priv,
218 struct mwifiex_bssdescriptor *bss_desc)
219 {
220 if (priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
221 !priv->sec_info.wpa2_enabled && bss_desc->privacy) {
222 return true;
223 }
224 return false;
225 }
226
227 /*
228 * This function checks if wpa is enabled in driver and scanned network is
229 * compatible with it.
230 */
231 static bool
232 mwifiex_is_network_compatible_for_wpa(struct mwifiex_private *priv,
233 struct mwifiex_bssdescriptor *bss_desc)
234 {
235 if (!priv->sec_info.wep_enabled && priv->sec_info.wpa_enabled &&
236 !priv->sec_info.wpa2_enabled && ((bss_desc->bcn_wpa_ie) &&
237 ((*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id == WLAN_EID_WPA))
238 /*
239 * Privacy bit may NOT be set in some APs like
240 * LinkSys WRT54G && bss_desc->privacy
241 */
242 ) {
243 dev_dbg(priv->adapter->dev, "info: %s: WPA:"
244 " wpa_ie=%#x wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s "
245 "EncMode=%#x privacy=%#x\n", __func__,
246 (bss_desc->bcn_wpa_ie) ?
247 (*(bss_desc->bcn_wpa_ie)).
248 vend_hdr.element_id : 0,
249 (bss_desc->bcn_rsn_ie) ?
250 (*(bss_desc->bcn_rsn_ie)).
251 ieee_hdr.element_id : 0,
252 (priv->sec_info.wep_enabled) ? "e" : "d",
253 (priv->sec_info.wpa_enabled) ? "e" : "d",
254 (priv->sec_info.wpa2_enabled) ? "e" : "d",
255 priv->sec_info.encryption_mode,
256 bss_desc->privacy);
257 return true;
258 }
259 return false;
260 }
261
262 /*
263 * This function checks if wpa2 is enabled in driver and scanned network is
264 * compatible with it.
265 */
266 static bool
267 mwifiex_is_network_compatible_for_wpa2(struct mwifiex_private *priv,
268 struct mwifiex_bssdescriptor *bss_desc)
269 {
270 if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
271 priv->sec_info.wpa2_enabled && ((bss_desc->bcn_rsn_ie) &&
272 ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id == WLAN_EID_RSN))
273 /*
274 * Privacy bit may NOT be set in some APs like
275 * LinkSys WRT54G && bss_desc->privacy
276 */
277 ) {
278 dev_dbg(priv->adapter->dev, "info: %s: WPA2: "
279 " wpa_ie=%#x wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s "
280 "EncMode=%#x privacy=%#x\n", __func__,
281 (bss_desc->bcn_wpa_ie) ?
282 (*(bss_desc->bcn_wpa_ie)).
283 vend_hdr.element_id : 0,
284 (bss_desc->bcn_rsn_ie) ?
285 (*(bss_desc->bcn_rsn_ie)).
286 ieee_hdr.element_id : 0,
287 (priv->sec_info.wep_enabled) ? "e" : "d",
288 (priv->sec_info.wpa_enabled) ? "e" : "d",
289 (priv->sec_info.wpa2_enabled) ? "e" : "d",
290 priv->sec_info.encryption_mode,
291 bss_desc->privacy);
292 return true;
293 }
294 return false;
295 }
296
297 /*
298 * This function checks if adhoc AES is enabled in driver and scanned network is
299 * compatible with it.
300 */
301 static bool
302 mwifiex_is_network_compatible_for_adhoc_aes(struct mwifiex_private *priv,
303 struct mwifiex_bssdescriptor *bss_desc)
304 {
305 if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
306 !priv->sec_info.wpa2_enabled && ((!bss_desc->bcn_wpa_ie) ||
307 ((*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id != WLAN_EID_WPA))
308 && ((!bss_desc->bcn_rsn_ie) || ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.
309 element_id != WLAN_EID_RSN))
310 && !priv->sec_info.encryption_mode
311 && bss_desc->privacy) {
312 return true;
313 }
314 return false;
315 }
316
317 /*
318 * This function checks if dynamic WEP is enabled in driver and scanned network
319 * is compatible with it.
320 */
321 static bool
322 mwifiex_is_network_compatible_for_dynamic_wep(struct mwifiex_private *priv,
323 struct mwifiex_bssdescriptor *bss_desc)
324 {
325 if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
326 !priv->sec_info.wpa2_enabled && ((!bss_desc->bcn_wpa_ie) ||
327 ((*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id != WLAN_EID_WPA))
328 && ((!bss_desc->bcn_rsn_ie) || ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.
329 element_id != WLAN_EID_RSN))
330 && priv->sec_info.encryption_mode
331 && bss_desc->privacy) {
332 dev_dbg(priv->adapter->dev, "info: %s: dynamic "
333 "WEP: wpa_ie=%#x wpa2_ie=%#x "
334 "EncMode=%#x privacy=%#x\n",
335 __func__,
336 (bss_desc->bcn_wpa_ie) ?
337 (*(bss_desc->bcn_wpa_ie)).
338 vend_hdr.element_id : 0,
339 (bss_desc->bcn_rsn_ie) ?
340 (*(bss_desc->bcn_rsn_ie)).
341 ieee_hdr.element_id : 0,
342 priv->sec_info.encryption_mode,
343 bss_desc->privacy);
344 return true;
345 }
346 return false;
347 }
348
349 /*
350 * This function checks if a scanned network is compatible with the driver
351 * settings.
352 *
353 * WEP WPA WPA2 ad-hoc encrypt Network
354 * enabled enabled enabled AES mode Privacy WPA WPA2 Compatible
355 * 0 0 0 0 NONE 0 0 0 yes No security
356 * 0 1 0 0 x 1x 1 x yes WPA (disable
357 * HT if no AES)
358 * 0 0 1 0 x 1x x 1 yes WPA2 (disable
359 * HT if no AES)
360 * 0 0 0 1 NONE 1 0 0 yes Ad-hoc AES
361 * 1 0 0 0 NONE 1 0 0 yes Static WEP
362 * (disable HT)
363 * 0 0 0 0 !=NONE 1 0 0 yes Dynamic WEP
364 *
365 * Compatibility is not matched while roaming, except for mode.
366 */
367 static s32
368 mwifiex_is_network_compatible(struct mwifiex_private *priv,
369 struct mwifiex_bssdescriptor *bss_desc, u32 mode)
370 {
371 struct mwifiex_adapter *adapter = priv->adapter;
372
373 bss_desc->disable_11n = false;
374
375 /* Don't check for compatibility if roaming */
376 if (priv->media_connected && (priv->bss_mode == NL80211_IFTYPE_STATION)
377 && (bss_desc->bss_mode == NL80211_IFTYPE_STATION))
378 return 0;
379
380 if (priv->wps.session_enable) {
381 dev_dbg(adapter->dev,
382 "info: return success directly in WPS period\n");
383 return 0;
384 }
385
386 if (mwifiex_is_network_compatible_for_wapi(priv, bss_desc)) {
387 dev_dbg(adapter->dev, "info: return success for WAPI AP\n");
388 return 0;
389 }
390
391 if (bss_desc->bss_mode == mode) {
392 if (mwifiex_is_network_compatible_for_no_sec(priv, bss_desc)) {
393 /* No security */
394 return 0;
395 } else if (mwifiex_is_network_compatible_for_static_wep(priv,
396 bss_desc)) {
397 /* Static WEP enabled */
398 dev_dbg(adapter->dev, "info: Disable 11n in WEP mode.\n");
399 bss_desc->disable_11n = true;
400 return 0;
401 } else if (mwifiex_is_network_compatible_for_wpa(priv,
402 bss_desc)) {
403 /* WPA enabled */
404 if (((priv->adapter->config_bands & BAND_GN
405 || priv->adapter->config_bands & BAND_AN)
406 && bss_desc->bcn_ht_cap)
407 && !mwifiex_is_wpa_oui_present(bss_desc,
408 CIPHER_SUITE_CCMP)) {
409
410 if (mwifiex_is_wpa_oui_present(bss_desc,
411 CIPHER_SUITE_TKIP)) {
412 dev_dbg(adapter->dev,
413 "info: Disable 11n if AES "
414 "is not supported by AP\n");
415 bss_desc->disable_11n = true;
416 } else {
417 return -1;
418 }
419 }
420 return 0;
421 } else if (mwifiex_is_network_compatible_for_wpa2(priv,
422 bss_desc)) {
423 /* WPA2 enabled */
424 if (((priv->adapter->config_bands & BAND_GN
425 || priv->adapter->config_bands & BAND_AN)
426 && bss_desc->bcn_ht_cap)
427 && !mwifiex_is_rsn_oui_present(bss_desc,
428 CIPHER_SUITE_CCMP)) {
429
430 if (mwifiex_is_rsn_oui_present(bss_desc,
431 CIPHER_SUITE_TKIP)) {
432 dev_dbg(adapter->dev,
433 "info: Disable 11n if AES "
434 "is not supported by AP\n");
435 bss_desc->disable_11n = true;
436 } else {
437 return -1;
438 }
439 }
440 return 0;
441 } else if (mwifiex_is_network_compatible_for_adhoc_aes(priv,
442 bss_desc)) {
443 /* Ad-hoc AES enabled */
444 return 0;
445 } else if (mwifiex_is_network_compatible_for_dynamic_wep(priv,
446 bss_desc)) {
447 /* Dynamic WEP enabled */
448 return 0;
449 }
450
451 /* Security doesn't match */
452 dev_dbg(adapter->dev, "info: %s: failed: "
453 "wpa_ie=%#x wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s EncMode"
454 "=%#x privacy=%#x\n",
455 __func__,
456 (bss_desc->bcn_wpa_ie) ?
457 (*(bss_desc->bcn_wpa_ie)).vend_hdr.
458 element_id : 0,
459 (bss_desc->bcn_rsn_ie) ?
460 (*(bss_desc->bcn_rsn_ie)).ieee_hdr.
461 element_id : 0,
462 (priv->sec_info.wep_enabled) ? "e" : "d",
463 (priv->sec_info.wpa_enabled) ? "e" : "d",
464 (priv->sec_info.wpa2_enabled) ? "e" : "d",
465 priv->sec_info.encryption_mode, bss_desc->privacy);
466 return -1;
467 }
468
469 /* Mode doesn't match */
470 return -1;
471 }
472
473 /*
474 * This function creates a channel list for the driver to scan, based
475 * on region/band information.
476 *
477 * This routine is used for any scan that is not provided with a
478 * specific channel list to scan.
479 */
480 static void
481 mwifiex_scan_create_channel_list(struct mwifiex_private *priv,
482 const struct mwifiex_user_scan_cfg
483 *user_scan_in,
484 struct mwifiex_chan_scan_param_set
485 *scan_chan_list,
486 u8 filtered_scan)
487 {
488 enum ieee80211_band band;
489 struct ieee80211_supported_band *sband;
490 struct ieee80211_channel *ch;
491 struct mwifiex_adapter *adapter = priv->adapter;
492 int chan_idx = 0, i;
493
494 for (band = 0; (band < IEEE80211_NUM_BANDS) ; band++) {
495
496 if (!priv->wdev->wiphy->bands[band])
497 continue;
498
499 sband = priv->wdev->wiphy->bands[band];
500
501 for (i = 0; (i < sband->n_channels) ; i++) {
502 ch = &sband->channels[i];
503 if (ch->flags & IEEE80211_CHAN_DISABLED)
504 continue;
505 scan_chan_list[chan_idx].radio_type = band;
506
507 if (user_scan_in &&
508 user_scan_in->chan_list[0].scan_time)
509 scan_chan_list[chan_idx].max_scan_time =
510 cpu_to_le16((u16) user_scan_in->
511 chan_list[0].scan_time);
512 else if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
513 scan_chan_list[chan_idx].max_scan_time =
514 cpu_to_le16(adapter->passive_scan_time);
515 else
516 scan_chan_list[chan_idx].max_scan_time =
517 cpu_to_le16(adapter->active_scan_time);
518
519 if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
520 scan_chan_list[chan_idx].chan_scan_mode_bitmap
521 |= MWIFIEX_PASSIVE_SCAN;
522 else
523 scan_chan_list[chan_idx].chan_scan_mode_bitmap
524 &= ~MWIFIEX_PASSIVE_SCAN;
525 scan_chan_list[chan_idx].chan_number =
526 (u32) ch->hw_value;
527 if (filtered_scan) {
528 scan_chan_list[chan_idx].max_scan_time =
529 cpu_to_le16(adapter->specific_scan_time);
530 scan_chan_list[chan_idx].chan_scan_mode_bitmap
531 |= MWIFIEX_DISABLE_CHAN_FILT;
532 }
533 chan_idx++;
534 }
535
536 }
537 }
538
539 /*
540 * This function constructs and sends multiple scan config commands to
541 * the firmware.
542 *
543 * Previous routines in the code flow have created a scan command configuration
544 * with any requested TLVs. This function splits the channel TLV into maximum
545 * channels supported per scan lists and sends the portion of the channel TLV,
546 * along with the other TLVs, to the firmware.
547 */
548 static int
549 mwifiex_scan_channel_list(struct mwifiex_private *priv,
550 u32 max_chan_per_scan, u8 filtered_scan,
551 struct mwifiex_scan_cmd_config *scan_cfg_out,
552 struct mwifiex_ie_types_chan_list_param_set
553 *chan_tlv_out,
554 struct mwifiex_chan_scan_param_set *scan_chan_list)
555 {
556 int ret = 0;
557 struct mwifiex_chan_scan_param_set *tmp_chan_list;
558 struct mwifiex_chan_scan_param_set *start_chan;
559
560 u32 tlv_idx;
561 u32 total_scan_time;
562 u32 done_early;
563
564 if (!scan_cfg_out || !chan_tlv_out || !scan_chan_list) {
565 dev_dbg(priv->adapter->dev,
566 "info: Scan: Null detect: %p, %p, %p\n",
567 scan_cfg_out, chan_tlv_out, scan_chan_list);
568 return -1;
569 }
570
571 chan_tlv_out->header.type = cpu_to_le16(TLV_TYPE_CHANLIST);
572
573 /* Set the temp channel struct pointer to the start of the desired
574 list */
575 tmp_chan_list = scan_chan_list;
576
577 /* Loop through the desired channel list, sending a new firmware scan
578 commands for each max_chan_per_scan channels (or for 1,6,11
579 individually if configured accordingly) */
580 while (tmp_chan_list->chan_number) {
581
582 tlv_idx = 0;
583 total_scan_time = 0;
584 chan_tlv_out->header.len = 0;
585 start_chan = tmp_chan_list;
586 done_early = false;
587
588 /*
589 * Construct the Channel TLV for the scan command. Continue to
590 * insert channel TLVs until:
591 * - the tlv_idx hits the maximum configured per scan command
592 * - the next channel to insert is 0 (end of desired channel
593 * list)
594 * - done_early is set (controlling individual scanning of
595 * 1,6,11)
596 */
597 while (tlv_idx < max_chan_per_scan
598 && tmp_chan_list->chan_number && !done_early) {
599
600 dev_dbg(priv->adapter->dev,
601 "info: Scan: Chan(%3d), Radio(%d),"
602 " Mode(%d, %d), Dur(%d)\n",
603 tmp_chan_list->chan_number,
604 tmp_chan_list->radio_type,
605 tmp_chan_list->chan_scan_mode_bitmap
606 & MWIFIEX_PASSIVE_SCAN,
607 (tmp_chan_list->chan_scan_mode_bitmap
608 & MWIFIEX_DISABLE_CHAN_FILT) >> 1,
609 le16_to_cpu(tmp_chan_list->max_scan_time));
610
611 /* Copy the current channel TLV to the command being
612 prepared */
613 memcpy(chan_tlv_out->chan_scan_param + tlv_idx,
614 tmp_chan_list,
615 sizeof(chan_tlv_out->chan_scan_param));
616
617 /* Increment the TLV header length by the size
618 appended */
619 chan_tlv_out->header.len =
620 cpu_to_le16(le16_to_cpu(chan_tlv_out->header.len) +
621 (sizeof(chan_tlv_out->chan_scan_param)));
622
623 /*
624 * The tlv buffer length is set to the number of bytes
625 * of the between the channel tlv pointer and the start
626 * of the tlv buffer. This compensates for any TLVs
627 * that were appended before the channel list.
628 */
629 scan_cfg_out->tlv_buf_len = (u32) ((u8 *) chan_tlv_out -
630 scan_cfg_out->tlv_buf);
631
632 /* Add the size of the channel tlv header and the data
633 length */
634 scan_cfg_out->tlv_buf_len +=
635 (sizeof(chan_tlv_out->header)
636 + le16_to_cpu(chan_tlv_out->header.len));
637
638 /* Increment the index to the channel tlv we are
639 constructing */
640 tlv_idx++;
641
642 /* Count the total scan time per command */
643 total_scan_time +=
644 le16_to_cpu(tmp_chan_list->max_scan_time);
645
646 done_early = false;
647
648 /* Stop the loop if the *current* channel is in the
649 1,6,11 set and we are not filtering on a BSSID
650 or SSID. */
651 if (!filtered_scan && (tmp_chan_list->chan_number == 1
652 || tmp_chan_list->chan_number == 6
653 || tmp_chan_list->chan_number == 11))
654 done_early = true;
655
656 /* Increment the tmp pointer to the next channel to
657 be scanned */
658 tmp_chan_list++;
659
660 /* Stop the loop if the *next* channel is in the 1,6,11
661 set. This will cause it to be the only channel
662 scanned on the next interation */
663 if (!filtered_scan && (tmp_chan_list->chan_number == 1
664 || tmp_chan_list->chan_number == 6
665 || tmp_chan_list->chan_number == 11))
666 done_early = true;
667 }
668
669 /* The total scan time should be less than scan command timeout
670 value */
671 if (total_scan_time > MWIFIEX_MAX_TOTAL_SCAN_TIME) {
672 dev_err(priv->adapter->dev, "total scan time %dms"
673 " is over limit (%dms), scan skipped\n",
674 total_scan_time, MWIFIEX_MAX_TOTAL_SCAN_TIME);
675 ret = -1;
676 break;
677 }
678
679 priv->adapter->scan_channels = start_chan;
680
681 /* Send the scan command to the firmware with the specified
682 cfg */
683 ret = mwifiex_send_cmd_async(priv, HostCmd_CMD_802_11_SCAN,
684 HostCmd_ACT_GEN_SET, 0,
685 scan_cfg_out);
686 if (ret)
687 break;
688 }
689
690 if (ret)
691 return -1;
692
693 return 0;
694 }
695
696 /*
697 * This function constructs a scan command configuration structure to use
698 * in scan commands.
699 *
700 * Application layer or other functions can invoke network scanning
701 * with a scan configuration supplied in a user scan configuration structure.
702 * This structure is used as the basis of one or many scan command configuration
703 * commands that are sent to the command processing module and eventually to the
704 * firmware.
705 *
706 * This function creates a scan command configuration structure based on the
707 * following user supplied parameters (if present):
708 * - SSID filter
709 * - BSSID filter
710 * - Number of Probes to be sent
711 * - Channel list
712 *
713 * If the SSID or BSSID filter is not present, the filter is disabled/cleared.
714 * If the number of probes is not set, adapter default setting is used.
715 */
716 static void
717 mwifiex_scan_setup_scan_config(struct mwifiex_private *priv,
718 const struct mwifiex_user_scan_cfg *user_scan_in,
719 struct mwifiex_scan_cmd_config *scan_cfg_out,
720 struct mwifiex_ie_types_chan_list_param_set
721 **chan_list_out,
722 struct mwifiex_chan_scan_param_set
723 *scan_chan_list,
724 u8 *max_chan_per_scan, u8 *filtered_scan,
725 u8 *scan_current_only)
726 {
727 struct mwifiex_adapter *adapter = priv->adapter;
728 struct mwifiex_ie_types_num_probes *num_probes_tlv;
729 struct mwifiex_ie_types_wildcard_ssid_params *wildcard_ssid_tlv;
730 struct mwifiex_ie_types_rates_param_set *rates_tlv;
731 const u8 zero_mac[ETH_ALEN] = { 0, 0, 0, 0, 0, 0 };
732 u8 *tlv_pos;
733 u32 num_probes;
734 u32 ssid_len;
735 u32 chan_idx;
736 u32 scan_type;
737 u16 scan_dur;
738 u8 channel;
739 u8 radio_type;
740 u32 ssid_idx;
741 u8 ssid_filter;
742 u8 rates[MWIFIEX_SUPPORTED_RATES];
743 u32 rates_size;
744 struct mwifiex_ie_types_htcap *ht_cap;
745
746 /* The tlv_buf_len is calculated for each scan command. The TLVs added
747 in this routine will be preserved since the routine that sends the
748 command will append channelTLVs at *chan_list_out. The difference
749 between the *chan_list_out and the tlv_buf start will be used to
750 calculate the size of anything we add in this routine. */
751 scan_cfg_out->tlv_buf_len = 0;
752
753 /* Running tlv pointer. Assigned to chan_list_out at end of function
754 so later routines know where channels can be added to the command
755 buf */
756 tlv_pos = scan_cfg_out->tlv_buf;
757
758 /* Initialize the scan as un-filtered; the flag is later set to TRUE
759 below if a SSID or BSSID filter is sent in the command */
760 *filtered_scan = false;
761
762 /* Initialize the scan as not being only on the current channel. If
763 the channel list is customized, only contains one channel, and is
764 the active channel, this is set true and data flow is not halted. */
765 *scan_current_only = false;
766
767 if (user_scan_in) {
768
769 /* Default the ssid_filter flag to TRUE, set false under
770 certain wildcard conditions and qualified by the existence
771 of an SSID list before marking the scan as filtered */
772 ssid_filter = true;
773
774 /* Set the BSS type scan filter, use Adapter setting if
775 unset */
776 scan_cfg_out->bss_mode =
777 (user_scan_in->bss_mode ? (u8) user_scan_in->
778 bss_mode : (u8) adapter->scan_mode);
779
780 /* Set the number of probes to send, use Adapter setting
781 if unset */
782 num_probes =
783 (user_scan_in->num_probes ? user_scan_in->
784 num_probes : adapter->scan_probes);
785
786 /*
787 * Set the BSSID filter to the incoming configuration,
788 * if non-zero. If not set, it will remain disabled
789 * (all zeros).
790 */
791 memcpy(scan_cfg_out->specific_bssid,
792 user_scan_in->specific_bssid,
793 sizeof(scan_cfg_out->specific_bssid));
794
795 for (ssid_idx = 0;
796 ((ssid_idx < ARRAY_SIZE(user_scan_in->ssid_list))
797 && (*user_scan_in->ssid_list[ssid_idx].ssid
798 || user_scan_in->ssid_list[ssid_idx].max_len));
799 ssid_idx++) {
800
801 ssid_len = strlen(user_scan_in->ssid_list[ssid_idx].
802 ssid) + 1;
803
804 wildcard_ssid_tlv =
805 (struct mwifiex_ie_types_wildcard_ssid_params *)
806 tlv_pos;
807 wildcard_ssid_tlv->header.type =
808 cpu_to_le16(TLV_TYPE_WILDCARDSSID);
809 wildcard_ssid_tlv->header.len = cpu_to_le16(
810 (u16) (ssid_len + sizeof(wildcard_ssid_tlv->
811 max_ssid_length)));
812
813 /* max_ssid_length = 0 tells firmware to perform
814 specific scan for the SSID filled */
815 wildcard_ssid_tlv->max_ssid_length = 0;
816
817 memcpy(wildcard_ssid_tlv->ssid,
818 user_scan_in->ssid_list[ssid_idx].ssid,
819 ssid_len);
820
821 tlv_pos += (sizeof(wildcard_ssid_tlv->header)
822 + le16_to_cpu(wildcard_ssid_tlv->header.len));
823
824 dev_dbg(adapter->dev, "info: scan: ssid_list[%d]: %s, %d\n",
825 ssid_idx, wildcard_ssid_tlv->ssid,
826 wildcard_ssid_tlv->max_ssid_length);
827
828 /* Empty wildcard ssid with a maxlen will match many or
829 potentially all SSIDs (maxlen == 32), therefore do
830 not treat the scan as
831 filtered. */
832 if (!ssid_len && wildcard_ssid_tlv->max_ssid_length)
833 ssid_filter = false;
834
835 }
836
837 /*
838 * The default number of channels sent in the command is low to
839 * ensure the response buffer from the firmware does not
840 * truncate scan results. That is not an issue with an SSID
841 * or BSSID filter applied to the scan results in the firmware.
842 */
843 if ((ssid_idx && ssid_filter)
844 || memcmp(scan_cfg_out->specific_bssid, &zero_mac,
845 sizeof(zero_mac)))
846 *filtered_scan = true;
847 } else {
848 scan_cfg_out->bss_mode = (u8) adapter->scan_mode;
849 num_probes = adapter->scan_probes;
850 }
851
852 /*
853 * If a specific BSSID or SSID is used, the number of channels in the
854 * scan command will be increased to the absolute maximum.
855 */
856 if (*filtered_scan)
857 *max_chan_per_scan = MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN;
858 else
859 *max_chan_per_scan = MWIFIEX_CHANNELS_PER_SCAN_CMD;
860
861 /* If the input config or adapter has the number of Probes set,
862 add tlv */
863 if (num_probes) {
864
865 dev_dbg(adapter->dev, "info: scan: num_probes = %d\n",
866 num_probes);
867
868 num_probes_tlv = (struct mwifiex_ie_types_num_probes *) tlv_pos;
869 num_probes_tlv->header.type = cpu_to_le16(TLV_TYPE_NUMPROBES);
870 num_probes_tlv->header.len =
871 cpu_to_le16(sizeof(num_probes_tlv->num_probes));
872 num_probes_tlv->num_probes = cpu_to_le16((u16) num_probes);
873
874 tlv_pos += sizeof(num_probes_tlv->header) +
875 le16_to_cpu(num_probes_tlv->header.len);
876
877 }
878
879 /* Append rates tlv */
880 memset(rates, 0, sizeof(rates));
881
882 rates_size = mwifiex_get_supported_rates(priv, rates);
883
884 rates_tlv = (struct mwifiex_ie_types_rates_param_set *) tlv_pos;
885 rates_tlv->header.type = cpu_to_le16(WLAN_EID_SUPP_RATES);
886 rates_tlv->header.len = cpu_to_le16((u16) rates_size);
887 memcpy(rates_tlv->rates, rates, rates_size);
888 tlv_pos += sizeof(rates_tlv->header) + rates_size;
889
890 dev_dbg(adapter->dev, "info: SCAN_CMD: Rates size = %d\n", rates_size);
891
892 if (ISSUPP_11NENABLED(priv->adapter->fw_cap_info)
893 && (priv->adapter->config_bands & BAND_GN
894 || priv->adapter->config_bands & BAND_AN)) {
895 ht_cap = (struct mwifiex_ie_types_htcap *) tlv_pos;
896 memset(ht_cap, 0, sizeof(struct mwifiex_ie_types_htcap));
897 ht_cap->header.type = cpu_to_le16(WLAN_EID_HT_CAPABILITY);
898 ht_cap->header.len =
899 cpu_to_le16(sizeof(struct ieee80211_ht_cap));
900 radio_type =
901 mwifiex_band_to_radio_type(priv->adapter->config_bands);
902 mwifiex_fill_cap_info(priv, radio_type, ht_cap);
903 tlv_pos += sizeof(struct mwifiex_ie_types_htcap);
904 }
905
906 /* Append vendor specific IE TLV */
907 mwifiex_cmd_append_vsie_tlv(priv, MWIFIEX_VSIE_MASK_SCAN, &tlv_pos);
908
909 /*
910 * Set the output for the channel TLV to the address in the tlv buffer
911 * past any TLVs that were added in this function (SSID, num_probes).
912 * Channel TLVs will be added past this for each scan command,
913 * preserving the TLVs that were previously added.
914 */
915 *chan_list_out =
916 (struct mwifiex_ie_types_chan_list_param_set *) tlv_pos;
917
918 if (user_scan_in && user_scan_in->chan_list[0].chan_number) {
919
920 dev_dbg(adapter->dev, "info: Scan: Using supplied channel list\n");
921
922 for (chan_idx = 0;
923 chan_idx < MWIFIEX_USER_SCAN_CHAN_MAX
924 && user_scan_in->chan_list[chan_idx].chan_number;
925 chan_idx++) {
926
927 channel = user_scan_in->chan_list[chan_idx].chan_number;
928 (scan_chan_list + chan_idx)->chan_number = channel;
929
930 radio_type =
931 user_scan_in->chan_list[chan_idx].radio_type;
932 (scan_chan_list + chan_idx)->radio_type = radio_type;
933
934 scan_type = user_scan_in->chan_list[chan_idx].scan_type;
935
936 if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE)
937 (scan_chan_list +
938 chan_idx)->chan_scan_mode_bitmap
939 |= MWIFIEX_PASSIVE_SCAN;
940 else
941 (scan_chan_list +
942 chan_idx)->chan_scan_mode_bitmap
943 &= ~MWIFIEX_PASSIVE_SCAN;
944
945 if (user_scan_in->chan_list[chan_idx].scan_time) {
946 scan_dur = (u16) user_scan_in->
947 chan_list[chan_idx].scan_time;
948 } else {
949 if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE)
950 scan_dur = adapter->passive_scan_time;
951 else if (*filtered_scan)
952 scan_dur = adapter->specific_scan_time;
953 else
954 scan_dur = adapter->active_scan_time;
955 }
956
957 (scan_chan_list + chan_idx)->min_scan_time =
958 cpu_to_le16(scan_dur);
959 (scan_chan_list + chan_idx)->max_scan_time =
960 cpu_to_le16(scan_dur);
961 }
962
963 /* Check if we are only scanning the current channel */
964 if ((chan_idx == 1)
965 && (user_scan_in->chan_list[0].chan_number
966 == priv->curr_bss_params.bss_descriptor.channel)) {
967 *scan_current_only = true;
968 dev_dbg(adapter->dev,
969 "info: Scan: Scanning current channel only\n");
970 }
971
972 } else {
973 dev_dbg(adapter->dev,
974 "info: Scan: Creating full region channel list\n");
975 mwifiex_scan_create_channel_list(priv, user_scan_in,
976 scan_chan_list,
977 *filtered_scan);
978 }
979 }
980
981 /*
982 * This function inspects the scan response buffer for pointers to
983 * expected TLVs.
984 *
985 * TLVs can be included at the end of the scan response BSS information.
986 *
987 * Data in the buffer is parsed pointers to TLVs that can potentially
988 * be passed back in the response.
989 */
990 static void
991 mwifiex_ret_802_11_scan_get_tlv_ptrs(struct mwifiex_adapter *adapter,
992 struct mwifiex_ie_types_data *tlv,
993 u32 tlv_buf_size, u32 req_tlv_type,
994 struct mwifiex_ie_types_data **tlv_data)
995 {
996 struct mwifiex_ie_types_data *current_tlv;
997 u32 tlv_buf_left;
998 u32 tlv_type;
999 u32 tlv_len;
1000
1001 current_tlv = tlv;
1002 tlv_buf_left = tlv_buf_size;
1003 *tlv_data = NULL;
1004
1005 dev_dbg(adapter->dev, "info: SCAN_RESP: tlv_buf_size = %d\n",
1006 tlv_buf_size);
1007
1008 while (tlv_buf_left >= sizeof(struct mwifiex_ie_types_header)) {
1009
1010 tlv_type = le16_to_cpu(current_tlv->header.type);
1011 tlv_len = le16_to_cpu(current_tlv->header.len);
1012
1013 if (sizeof(tlv->header) + tlv_len > tlv_buf_left) {
1014 dev_err(adapter->dev, "SCAN_RESP: TLV buffer corrupt\n");
1015 break;
1016 }
1017
1018 if (req_tlv_type == tlv_type) {
1019 switch (tlv_type) {
1020 case TLV_TYPE_TSFTIMESTAMP:
1021 dev_dbg(adapter->dev, "info: SCAN_RESP: TSF "
1022 "timestamp TLV, len = %d\n", tlv_len);
1023 *tlv_data = (struct mwifiex_ie_types_data *)
1024 current_tlv;
1025 break;
1026 case TLV_TYPE_CHANNELBANDLIST:
1027 dev_dbg(adapter->dev, "info: SCAN_RESP: channel"
1028 " band list TLV, len = %d\n", tlv_len);
1029 *tlv_data = (struct mwifiex_ie_types_data *)
1030 current_tlv;
1031 break;
1032 default:
1033 dev_err(adapter->dev,
1034 "SCAN_RESP: unhandled TLV = %d\n",
1035 tlv_type);
1036 /* Give up, this seems corrupted */
1037 return;
1038 }
1039 }
1040
1041 if (*tlv_data)
1042 break;
1043
1044
1045 tlv_buf_left -= (sizeof(tlv->header) + tlv_len);
1046 current_tlv =
1047 (struct mwifiex_ie_types_data *) (current_tlv->data +
1048 tlv_len);
1049
1050 } /* while */
1051 }
1052
1053 /*
1054 * This function parses provided beacon buffer and updates
1055 * respective fields in bss descriptor structure.
1056 */
1057 int
1058 mwifiex_update_bss_desc_with_ie(struct mwifiex_adapter *adapter,
1059 struct mwifiex_bssdescriptor *bss_entry,
1060 u8 *ie_buf, u32 ie_len)
1061 {
1062 int ret = 0;
1063 u8 element_id;
1064 struct ieee_types_fh_param_set *fh_param_set;
1065 struct ieee_types_ds_param_set *ds_param_set;
1066 struct ieee_types_cf_param_set *cf_param_set;
1067 struct ieee_types_ibss_param_set *ibss_param_set;
1068 u8 *current_ptr;
1069 u8 *rate;
1070 u8 element_len;
1071 u16 total_ie_len;
1072 u8 bytes_to_copy;
1073 u8 rate_size;
1074 u8 found_data_rate_ie;
1075 u32 bytes_left;
1076 struct ieee_types_vendor_specific *vendor_ie;
1077 const u8 wpa_oui[4] = { 0x00, 0x50, 0xf2, 0x01 };
1078 const u8 wmm_oui[4] = { 0x00, 0x50, 0xf2, 0x02 };
1079
1080 found_data_rate_ie = false;
1081 rate_size = 0;
1082 current_ptr = ie_buf;
1083 bytes_left = ie_len;
1084 bss_entry->beacon_buf = ie_buf;
1085 bss_entry->beacon_buf_size = ie_len;
1086
1087 /* Process variable IE */
1088 while (bytes_left >= 2) {
1089 element_id = *current_ptr;
1090 element_len = *(current_ptr + 1);
1091 total_ie_len = element_len + sizeof(struct ieee_types_header);
1092
1093 if (bytes_left < total_ie_len) {
1094 dev_err(adapter->dev, "err: InterpretIE: in processing"
1095 " IE, bytes left < IE length\n");
1096 return -1;
1097 }
1098 switch (element_id) {
1099 case WLAN_EID_SSID:
1100 bss_entry->ssid.ssid_len = element_len;
1101 memcpy(bss_entry->ssid.ssid, (current_ptr + 2),
1102 element_len);
1103 dev_dbg(adapter->dev, "info: InterpretIE: ssid: "
1104 "%-32s\n", bss_entry->ssid.ssid);
1105 break;
1106
1107 case WLAN_EID_SUPP_RATES:
1108 memcpy(bss_entry->data_rates, current_ptr + 2,
1109 element_len);
1110 memcpy(bss_entry->supported_rates, current_ptr + 2,
1111 element_len);
1112 rate_size = element_len;
1113 found_data_rate_ie = true;
1114 break;
1115
1116 case WLAN_EID_FH_PARAMS:
1117 fh_param_set =
1118 (struct ieee_types_fh_param_set *) current_ptr;
1119 memcpy(&bss_entry->phy_param_set.fh_param_set,
1120 fh_param_set,
1121 sizeof(struct ieee_types_fh_param_set));
1122 break;
1123
1124 case WLAN_EID_DS_PARAMS:
1125 ds_param_set =
1126 (struct ieee_types_ds_param_set *) current_ptr;
1127
1128 bss_entry->channel = ds_param_set->current_chan;
1129
1130 memcpy(&bss_entry->phy_param_set.ds_param_set,
1131 ds_param_set,
1132 sizeof(struct ieee_types_ds_param_set));
1133 break;
1134
1135 case WLAN_EID_CF_PARAMS:
1136 cf_param_set =
1137 (struct ieee_types_cf_param_set *) current_ptr;
1138 memcpy(&bss_entry->ss_param_set.cf_param_set,
1139 cf_param_set,
1140 sizeof(struct ieee_types_cf_param_set));
1141 break;
1142
1143 case WLAN_EID_IBSS_PARAMS:
1144 ibss_param_set =
1145 (struct ieee_types_ibss_param_set *)
1146 current_ptr;
1147 memcpy(&bss_entry->ss_param_set.ibss_param_set,
1148 ibss_param_set,
1149 sizeof(struct ieee_types_ibss_param_set));
1150 break;
1151
1152 case WLAN_EID_ERP_INFO:
1153 bss_entry->erp_flags = *(current_ptr + 2);
1154 break;
1155
1156 case WLAN_EID_EXT_SUPP_RATES:
1157 /*
1158 * Only process extended supported rate
1159 * if data rate is already found.
1160 * Data rate IE should come before
1161 * extended supported rate IE
1162 */
1163 if (found_data_rate_ie) {
1164 if ((element_len + rate_size) >
1165 MWIFIEX_SUPPORTED_RATES)
1166 bytes_to_copy =
1167 (MWIFIEX_SUPPORTED_RATES -
1168 rate_size);
1169 else
1170 bytes_to_copy = element_len;
1171
1172 rate = (u8 *) bss_entry->data_rates;
1173 rate += rate_size;
1174 memcpy(rate, current_ptr + 2, bytes_to_copy);
1175
1176 rate = (u8 *) bss_entry->supported_rates;
1177 rate += rate_size;
1178 memcpy(rate, current_ptr + 2, bytes_to_copy);
1179 }
1180 break;
1181
1182 case WLAN_EID_VENDOR_SPECIFIC:
1183 vendor_ie = (struct ieee_types_vendor_specific *)
1184 current_ptr;
1185
1186 if (!memcmp
1187 (vendor_ie->vend_hdr.oui, wpa_oui,
1188 sizeof(wpa_oui))) {
1189 bss_entry->bcn_wpa_ie =
1190 (struct ieee_types_vendor_specific *)
1191 current_ptr;
1192 bss_entry->wpa_offset = (u16) (current_ptr -
1193 bss_entry->beacon_buf);
1194 } else if (!memcmp(vendor_ie->vend_hdr.oui, wmm_oui,
1195 sizeof(wmm_oui))) {
1196 if (total_ie_len ==
1197 sizeof(struct ieee_types_wmm_parameter)
1198 || total_ie_len ==
1199 sizeof(struct ieee_types_wmm_info))
1200 /*
1201 * Only accept and copy the WMM IE if
1202 * it matches the size expected for the
1203 * WMM Info IE or the WMM Parameter IE.
1204 */
1205 memcpy((u8 *) &bss_entry->wmm_ie,
1206 current_ptr, total_ie_len);
1207 }
1208 break;
1209 case WLAN_EID_RSN:
1210 bss_entry->bcn_rsn_ie =
1211 (struct ieee_types_generic *) current_ptr;
1212 bss_entry->rsn_offset = (u16) (current_ptr -
1213 bss_entry->beacon_buf);
1214 break;
1215 case WLAN_EID_BSS_AC_ACCESS_DELAY:
1216 bss_entry->bcn_wapi_ie =
1217 (struct ieee_types_generic *) current_ptr;
1218 bss_entry->wapi_offset = (u16) (current_ptr -
1219 bss_entry->beacon_buf);
1220 break;
1221 case WLAN_EID_HT_CAPABILITY:
1222 bss_entry->bcn_ht_cap = (struct ieee80211_ht_cap *)
1223 (current_ptr +
1224 sizeof(struct ieee_types_header));
1225 bss_entry->ht_cap_offset = (u16) (current_ptr +
1226 sizeof(struct ieee_types_header) -
1227 bss_entry->beacon_buf);
1228 break;
1229 case WLAN_EID_HT_INFORMATION:
1230 bss_entry->bcn_ht_info = (struct ieee80211_ht_info *)
1231 (current_ptr +
1232 sizeof(struct ieee_types_header));
1233 bss_entry->ht_info_offset = (u16) (current_ptr +
1234 sizeof(struct ieee_types_header) -
1235 bss_entry->beacon_buf);
1236 break;
1237 case WLAN_EID_BSS_COEX_2040:
1238 bss_entry->bcn_bss_co_2040 = (u8 *) (current_ptr +
1239 sizeof(struct ieee_types_header));
1240 bss_entry->bss_co_2040_offset = (u16) (current_ptr +
1241 sizeof(struct ieee_types_header) -
1242 bss_entry->beacon_buf);
1243 break;
1244 case WLAN_EID_EXT_CAPABILITY:
1245 bss_entry->bcn_ext_cap = (u8 *) (current_ptr +
1246 sizeof(struct ieee_types_header));
1247 bss_entry->ext_cap_offset = (u16) (current_ptr +
1248 sizeof(struct ieee_types_header) -
1249 bss_entry->beacon_buf);
1250 break;
1251 default:
1252 break;
1253 }
1254
1255 current_ptr += element_len + 2;
1256
1257 /* Need to account for IE ID and IE Len */
1258 bytes_left -= (element_len + 2);
1259
1260 } /* while (bytes_left > 2) */
1261 return ret;
1262 }
1263
1264 /*
1265 * This function converts radio type scan parameter to a band configuration
1266 * to be used in join command.
1267 */
1268 static u8
1269 mwifiex_radio_type_to_band(u8 radio_type)
1270 {
1271 switch (radio_type) {
1272 case HostCmd_SCAN_RADIO_TYPE_A:
1273 return BAND_A;
1274 case HostCmd_SCAN_RADIO_TYPE_BG:
1275 default:
1276 return BAND_G;
1277 }
1278 }
1279
1280 /*
1281 * This is an internal function used to start a scan based on an input
1282 * configuration.
1283 *
1284 * This uses the input user scan configuration information when provided in
1285 * order to send the appropriate scan commands to firmware to populate or
1286 * update the internal driver scan table.
1287 */
1288 static int mwifiex_scan_networks(struct mwifiex_private *priv,
1289 const struct mwifiex_user_scan_cfg *user_scan_in)
1290 {
1291 int ret = 0;
1292 struct mwifiex_adapter *adapter = priv->adapter;
1293 struct cmd_ctrl_node *cmd_node;
1294 union mwifiex_scan_cmd_config_tlv *scan_cfg_out;
1295 struct mwifiex_ie_types_chan_list_param_set *chan_list_out;
1296 u32 buf_size;
1297 struct mwifiex_chan_scan_param_set *scan_chan_list;
1298 u8 filtered_scan;
1299 u8 scan_current_chan_only;
1300 u8 max_chan_per_scan;
1301 unsigned long flags;
1302
1303 if (adapter->scan_processing) {
1304 dev_dbg(adapter->dev, "cmd: Scan already in process...\n");
1305 return ret;
1306 }
1307
1308 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
1309 adapter->scan_processing = true;
1310 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
1311
1312 if (priv->scan_block) {
1313 dev_dbg(adapter->dev,
1314 "cmd: Scan is blocked during association...\n");
1315 return ret;
1316 }
1317
1318 scan_cfg_out = kzalloc(sizeof(union mwifiex_scan_cmd_config_tlv),
1319 GFP_KERNEL);
1320 if (!scan_cfg_out) {
1321 dev_err(adapter->dev, "failed to alloc scan_cfg_out\n");
1322 return -ENOMEM;
1323 }
1324
1325 buf_size = sizeof(struct mwifiex_chan_scan_param_set) *
1326 MWIFIEX_USER_SCAN_CHAN_MAX;
1327 scan_chan_list = kzalloc(buf_size, GFP_KERNEL);
1328 if (!scan_chan_list) {
1329 dev_err(adapter->dev, "failed to alloc scan_chan_list\n");
1330 kfree(scan_cfg_out);
1331 return -ENOMEM;
1332 }
1333
1334 mwifiex_scan_setup_scan_config(priv, user_scan_in,
1335 &scan_cfg_out->config, &chan_list_out,
1336 scan_chan_list, &max_chan_per_scan,
1337 &filtered_scan, &scan_current_chan_only);
1338
1339 ret = mwifiex_scan_channel_list(priv, max_chan_per_scan, filtered_scan,
1340 &scan_cfg_out->config, chan_list_out,
1341 scan_chan_list);
1342
1343 /* Get scan command from scan_pending_q and put to cmd_pending_q */
1344 if (!ret) {
1345 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
1346 if (!list_empty(&adapter->scan_pending_q)) {
1347 cmd_node = list_first_entry(&adapter->scan_pending_q,
1348 struct cmd_ctrl_node, list);
1349 list_del(&cmd_node->list);
1350 spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
1351 flags);
1352 adapter->cmd_queued = cmd_node;
1353 mwifiex_insert_cmd_to_pending_q(adapter, cmd_node,
1354 true);
1355 } else {
1356 spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
1357 flags);
1358 }
1359 } else {
1360 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
1361 adapter->scan_processing = true;
1362 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
1363 }
1364
1365 kfree(scan_cfg_out);
1366 kfree(scan_chan_list);
1367 return ret;
1368 }
1369
1370 /*
1371 * Sends IOCTL request to start a scan with user configurations.
1372 *
1373 * This function allocates the IOCTL request buffer, fills it
1374 * with requisite parameters and calls the IOCTL handler.
1375 *
1376 * Upon completion, it also generates a wireless event to notify
1377 * applications.
1378 */
1379 int mwifiex_set_user_scan_ioctl(struct mwifiex_private *priv,
1380 struct mwifiex_user_scan_cfg *scan_req)
1381 {
1382 int status;
1383
1384 status = mwifiex_scan_networks(priv, scan_req);
1385 queue_work(priv->adapter->workqueue, &priv->adapter->main_work);
1386
1387 return status;
1388 }
1389
1390 /*
1391 * This function prepares a scan command to be sent to the firmware.
1392 *
1393 * This uses the scan command configuration sent to the command processing
1394 * module in command preparation stage to configure a scan command structure
1395 * to send to firmware.
1396 *
1397 * The fixed fields specifying the BSS type and BSSID filters as well as a
1398 * variable number/length of TLVs are sent in the command to firmware.
1399 *
1400 * Preparation also includes -
1401 * - Setting command ID, and proper size
1402 * - Ensuring correct endian-ness
1403 */
1404 int mwifiex_cmd_802_11_scan(struct host_cmd_ds_command *cmd,
1405 struct mwifiex_scan_cmd_config *scan_cfg)
1406 {
1407 struct host_cmd_ds_802_11_scan *scan_cmd = &cmd->params.scan;
1408
1409 /* Set fixed field variables in scan command */
1410 scan_cmd->bss_mode = scan_cfg->bss_mode;
1411 memcpy(scan_cmd->bssid, scan_cfg->specific_bssid,
1412 sizeof(scan_cmd->bssid));
1413 memcpy(scan_cmd->tlv_buffer, scan_cfg->tlv_buf, scan_cfg->tlv_buf_len);
1414
1415 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_SCAN);
1416
1417 /* Size is equal to the sizeof(fixed portions) + the TLV len + header */
1418 cmd->size = cpu_to_le16((u16) (sizeof(scan_cmd->bss_mode)
1419 + sizeof(scan_cmd->bssid)
1420 + scan_cfg->tlv_buf_len + S_DS_GEN));
1421
1422 return 0;
1423 }
1424
1425 /*
1426 * This function checks compatibility of requested network with current
1427 * driver settings.
1428 */
1429 int mwifiex_check_network_compatibility(struct mwifiex_private *priv,
1430 struct mwifiex_bssdescriptor *bss_desc)
1431 {
1432 int ret = -1;
1433
1434 if (!bss_desc)
1435 return -1;
1436
1437 if ((mwifiex_get_cfp_by_band_and_channel_from_cfg80211(priv,
1438 (u8) bss_desc->bss_band, (u16) bss_desc->channel))) {
1439 switch (priv->bss_mode) {
1440 case NL80211_IFTYPE_STATION:
1441 case NL80211_IFTYPE_ADHOC:
1442 ret = mwifiex_is_network_compatible(priv, bss_desc,
1443 priv->bss_mode);
1444 if (ret)
1445 dev_err(priv->adapter->dev, "cannot find ssid "
1446 "%s\n", bss_desc->ssid.ssid);
1447 break;
1448 default:
1449 ret = 0;
1450 }
1451 }
1452
1453 return ret;
1454 }
1455
1456 static int
1457 mwifiex_update_curr_bss_params(struct mwifiex_private *priv, u8 *bssid,
1458 s32 rssi, const u8 *ie_buf, size_t ie_len,
1459 u16 beacon_period, u16 cap_info_bitmap, u8 band)
1460 {
1461 struct mwifiex_bssdescriptor *bss_desc;
1462 int ret;
1463 unsigned long flags;
1464 u8 *beacon_ie;
1465
1466 /* Allocate and fill new bss descriptor */
1467 bss_desc = kzalloc(sizeof(struct mwifiex_bssdescriptor),
1468 GFP_KERNEL);
1469 if (!bss_desc) {
1470 dev_err(priv->adapter->dev, " failed to alloc bss_desc\n");
1471 return -ENOMEM;
1472 }
1473
1474 beacon_ie = kmemdup(ie_buf, ie_len, GFP_KERNEL);
1475 if (!beacon_ie) {
1476 kfree(bss_desc);
1477 dev_err(priv->adapter->dev, " failed to alloc beacon_ie\n");
1478 return -ENOMEM;
1479 }
1480
1481 ret = mwifiex_fill_new_bss_desc(priv, bssid, rssi, beacon_ie,
1482 ie_len, beacon_period,
1483 cap_info_bitmap, band, bss_desc);
1484 if (ret)
1485 goto done;
1486
1487 ret = mwifiex_check_network_compatibility(priv, bss_desc);
1488 if (ret)
1489 goto done;
1490
1491 /* Update current bss descriptor parameters */
1492 spin_lock_irqsave(&priv->curr_bcn_buf_lock, flags);
1493 priv->curr_bss_params.bss_descriptor.bcn_wpa_ie = NULL;
1494 priv->curr_bss_params.bss_descriptor.wpa_offset = 0;
1495 priv->curr_bss_params.bss_descriptor.bcn_rsn_ie = NULL;
1496 priv->curr_bss_params.bss_descriptor.rsn_offset = 0;
1497 priv->curr_bss_params.bss_descriptor.bcn_wapi_ie = NULL;
1498 priv->curr_bss_params.bss_descriptor.wapi_offset = 0;
1499 priv->curr_bss_params.bss_descriptor.bcn_ht_cap = NULL;
1500 priv->curr_bss_params.bss_descriptor.ht_cap_offset =
1501 0;
1502 priv->curr_bss_params.bss_descriptor.bcn_ht_info = NULL;
1503 priv->curr_bss_params.bss_descriptor.ht_info_offset =
1504 0;
1505 priv->curr_bss_params.bss_descriptor.bcn_bss_co_2040 =
1506 NULL;
1507 priv->curr_bss_params.bss_descriptor.
1508 bss_co_2040_offset = 0;
1509 priv->curr_bss_params.bss_descriptor.bcn_ext_cap = NULL;
1510 priv->curr_bss_params.bss_descriptor.ext_cap_offset = 0;
1511 priv->curr_bss_params.bss_descriptor.beacon_buf = NULL;
1512 priv->curr_bss_params.bss_descriptor.beacon_buf_size =
1513 0;
1514
1515 /* Make a copy of current BSSID descriptor */
1516 memcpy(&priv->curr_bss_params.bss_descriptor, bss_desc,
1517 sizeof(priv->curr_bss_params.bss_descriptor));
1518 mwifiex_save_curr_bcn(priv);
1519 spin_unlock_irqrestore(&priv->curr_bcn_buf_lock, flags);
1520
1521 done:
1522 kfree(bss_desc);
1523 kfree(beacon_ie);
1524 return 0;
1525 }
1526
1527 /*
1528 * This function handles the command response of scan.
1529 *
1530 * The response buffer for the scan command has the following
1531 * memory layout:
1532 *
1533 * .-------------------------------------------------------------.
1534 * | Header (4 * sizeof(t_u16)): Standard command response hdr |
1535 * .-------------------------------------------------------------.
1536 * | BufSize (t_u16) : sizeof the BSS Description data |
1537 * .-------------------------------------------------------------.
1538 * | NumOfSet (t_u8) : Number of BSS Descs returned |
1539 * .-------------------------------------------------------------.
1540 * | BSSDescription data (variable, size given in BufSize) |
1541 * .-------------------------------------------------------------.
1542 * | TLV data (variable, size calculated using Header->Size, |
1543 * | BufSize and sizeof the fixed fields above) |
1544 * .-------------------------------------------------------------.
1545 */
1546 int mwifiex_ret_802_11_scan(struct mwifiex_private *priv,
1547 struct host_cmd_ds_command *resp)
1548 {
1549 int ret = 0;
1550 struct mwifiex_adapter *adapter = priv->adapter;
1551 struct cmd_ctrl_node *cmd_node;
1552 struct host_cmd_ds_802_11_scan_rsp *scan_rsp;
1553 struct mwifiex_ie_types_data *tlv_data;
1554 struct mwifiex_ie_types_tsf_timestamp *tsf_tlv;
1555 u8 *bss_info;
1556 u32 scan_resp_size;
1557 u32 bytes_left;
1558 u32 idx;
1559 u32 tlv_buf_size;
1560 struct mwifiex_chan_freq_power *cfp;
1561 struct mwifiex_ie_types_chan_band_list_param_set *chan_band_tlv;
1562 struct chan_band_param_set *chan_band;
1563 u8 is_bgscan_resp;
1564 unsigned long flags;
1565 struct cfg80211_bss *bss;
1566
1567 is_bgscan_resp = (le16_to_cpu(resp->command)
1568 == HostCmd_CMD_802_11_BG_SCAN_QUERY);
1569 if (is_bgscan_resp)
1570 scan_rsp = &resp->params.bg_scan_query_resp.scan_resp;
1571 else
1572 scan_rsp = &resp->params.scan_resp;
1573
1574
1575 if (scan_rsp->number_of_sets > MWIFIEX_MAX_AP) {
1576 dev_err(adapter->dev, "SCAN_RESP: too many AP returned (%d)\n",
1577 scan_rsp->number_of_sets);
1578 ret = -1;
1579 goto done;
1580 }
1581
1582 bytes_left = le16_to_cpu(scan_rsp->bss_descript_size);
1583 dev_dbg(adapter->dev, "info: SCAN_RESP: bss_descript_size %d\n",
1584 bytes_left);
1585
1586 scan_resp_size = le16_to_cpu(resp->size);
1587
1588 dev_dbg(adapter->dev,
1589 "info: SCAN_RESP: returned %d APs before parsing\n",
1590 scan_rsp->number_of_sets);
1591
1592 bss_info = scan_rsp->bss_desc_and_tlv_buffer;
1593
1594 /*
1595 * The size of the TLV buffer is equal to the entire command response
1596 * size (scan_resp_size) minus the fixed fields (sizeof()'s), the
1597 * BSS Descriptions (bss_descript_size as bytesLef) and the command
1598 * response header (S_DS_GEN)
1599 */
1600 tlv_buf_size = scan_resp_size - (bytes_left
1601 + sizeof(scan_rsp->bss_descript_size)
1602 + sizeof(scan_rsp->number_of_sets)
1603 + S_DS_GEN);
1604
1605 tlv_data = (struct mwifiex_ie_types_data *) (scan_rsp->
1606 bss_desc_and_tlv_buffer +
1607 bytes_left);
1608
1609 /* Search the TLV buffer space in the scan response for any valid
1610 TLVs */
1611 mwifiex_ret_802_11_scan_get_tlv_ptrs(adapter, tlv_data, tlv_buf_size,
1612 TLV_TYPE_TSFTIMESTAMP,
1613 (struct mwifiex_ie_types_data **)
1614 &tsf_tlv);
1615
1616 /* Search the TLV buffer space in the scan response for any valid
1617 TLVs */
1618 mwifiex_ret_802_11_scan_get_tlv_ptrs(adapter, tlv_data, tlv_buf_size,
1619 TLV_TYPE_CHANNELBANDLIST,
1620 (struct mwifiex_ie_types_data **)
1621 &chan_band_tlv);
1622
1623 for (idx = 0; idx < scan_rsp->number_of_sets && bytes_left; idx++) {
1624 u8 bssid[ETH_ALEN];
1625 s32 rssi;
1626 const u8 *ie_buf;
1627 size_t ie_len;
1628 int channel = -1;
1629 u64 network_tsf = 0;
1630 u16 beacon_size = 0;
1631 u32 curr_bcn_bytes;
1632 u32 freq;
1633 u16 beacon_period;
1634 u16 cap_info_bitmap;
1635 u8 *current_ptr;
1636 struct mwifiex_bcn_param *bcn_param;
1637
1638 if (bytes_left >= sizeof(beacon_size)) {
1639 /* Extract & convert beacon size from command buffer */
1640 memcpy(&beacon_size, bss_info, sizeof(beacon_size));
1641 bytes_left -= sizeof(beacon_size);
1642 bss_info += sizeof(beacon_size);
1643 }
1644
1645 if (!beacon_size || beacon_size > bytes_left) {
1646 bss_info += bytes_left;
1647 bytes_left = 0;
1648 return -1;
1649 }
1650
1651 /* Initialize the current working beacon pointer for this BSS
1652 * iteration */
1653 current_ptr = bss_info;
1654
1655 /* Advance the return beacon pointer past the current beacon */
1656 bss_info += beacon_size;
1657 bytes_left -= beacon_size;
1658
1659 curr_bcn_bytes = beacon_size;
1660
1661 /*
1662 * First 5 fields are bssid, RSSI, time stamp, beacon interval,
1663 * and capability information
1664 */
1665 if (curr_bcn_bytes < sizeof(struct mwifiex_bcn_param)) {
1666 dev_err(adapter->dev, "InterpretIE: not enough bytes left\n");
1667 continue;
1668 }
1669 bcn_param = (struct mwifiex_bcn_param *)current_ptr;
1670 current_ptr += sizeof(*bcn_param);
1671 curr_bcn_bytes -= sizeof(*bcn_param);
1672
1673 memcpy(bssid, bcn_param->bssid, ETH_ALEN);
1674
1675 rssi = (s32) (bcn_param->rssi);
1676 dev_dbg(adapter->dev, "info: InterpretIE: RSSI=%02X\n",
1677 rssi);
1678
1679 beacon_period = le16_to_cpu(bcn_param->beacon_period);
1680
1681 cap_info_bitmap = le16_to_cpu(bcn_param->cap_info_bitmap);
1682 dev_dbg(adapter->dev, "info: InterpretIE: capabilities=0x%X\n",
1683 cap_info_bitmap);
1684
1685 /* Rest of the current buffer are IE's */
1686 ie_buf = current_ptr;
1687 ie_len = curr_bcn_bytes;
1688 dev_dbg(adapter->dev, "info: InterpretIE: IELength for this AP"
1689 " = %d\n", curr_bcn_bytes);
1690
1691 while (curr_bcn_bytes >= sizeof(struct ieee_types_header)) {
1692 u8 element_id, element_len;
1693
1694 element_id = *current_ptr;
1695 element_len = *(current_ptr + 1);
1696 if (curr_bcn_bytes < element_len +
1697 sizeof(struct ieee_types_header)) {
1698 dev_err(priv->adapter->dev, "%s: in processing"
1699 " IE, bytes left < IE length\n",
1700 __func__);
1701 goto done;
1702 }
1703 if (element_id == WLAN_EID_DS_PARAMS) {
1704 channel = *(u8 *) (current_ptr +
1705 sizeof(struct ieee_types_header));
1706 break;
1707 }
1708
1709 current_ptr += element_len +
1710 sizeof(struct ieee_types_header);
1711 curr_bcn_bytes -= element_len +
1712 sizeof(struct ieee_types_header);
1713 }
1714
1715 /*
1716 * If the TSF TLV was appended to the scan results, save this
1717 * entry's TSF value in the networkTSF field.The networkTSF is
1718 * the firmware's TSF value at the time the beacon or probe
1719 * response was received.
1720 */
1721 if (tsf_tlv)
1722 memcpy(&network_tsf,
1723 &tsf_tlv->tsf_data[idx * TSF_DATA_SIZE],
1724 sizeof(network_tsf));
1725
1726 if (channel != -1) {
1727 struct ieee80211_channel *chan;
1728 u8 band;
1729
1730 band = BAND_G;
1731 if (chan_band_tlv) {
1732 chan_band =
1733 &chan_band_tlv->chan_band_param[idx];
1734 band = mwifiex_radio_type_to_band(
1735 chan_band->radio_type
1736 & (BIT(0) | BIT(1)));
1737 }
1738
1739 cfp = mwifiex_get_cfp_by_band_and_channel_from_cfg80211(
1740 priv, (u8)band, (u16)channel);
1741
1742 freq = cfp ? cfp->freq : 0;
1743
1744 chan = ieee80211_get_channel(priv->wdev->wiphy, freq);
1745
1746 if (chan && !(chan->flags & IEEE80211_CHAN_DISABLED)) {
1747 bss = cfg80211_inform_bss(priv->wdev->wiphy,
1748 chan, bssid, network_tsf,
1749 cap_info_bitmap, beacon_period,
1750 ie_buf, ie_len, rssi, GFP_KERNEL);
1751 *(u8 *)bss->priv = band;
1752 cfg80211_put_bss(bss);
1753
1754 if (priv->media_connected && !memcmp(bssid,
1755 priv->curr_bss_params.bss_descriptor
1756 .mac_address, ETH_ALEN))
1757 mwifiex_update_curr_bss_params(priv,
1758 bssid, rssi, ie_buf,
1759 ie_len, beacon_period,
1760 cap_info_bitmap, band);
1761 }
1762 } else {
1763 dev_dbg(adapter->dev, "missing BSS channel IE\n");
1764 }
1765 }
1766
1767 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
1768 if (list_empty(&adapter->scan_pending_q)) {
1769 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
1770 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
1771 adapter->scan_processing = false;
1772 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
1773
1774 /* Need to indicate IOCTL complete */
1775 if (adapter->curr_cmd->wait_q_enabled) {
1776 adapter->cmd_wait_q.status = 0;
1777 mwifiex_complete_cmd(adapter, adapter->curr_cmd);
1778 }
1779 if (priv->report_scan_result)
1780 priv->report_scan_result = false;
1781 if (priv->scan_pending_on_block) {
1782 priv->scan_pending_on_block = false;
1783 up(&priv->async_sem);
1784 }
1785
1786 if (priv->user_scan_cfg) {
1787 dev_dbg(priv->adapter->dev, "info: %s: sending scan "
1788 "results\n", __func__);
1789 cfg80211_scan_done(priv->scan_request, 0);
1790 priv->scan_request = NULL;
1791 kfree(priv->user_scan_cfg);
1792 priv->user_scan_cfg = NULL;
1793 }
1794 } else {
1795 /* Get scan command from scan_pending_q and put to
1796 cmd_pending_q */
1797 cmd_node = list_first_entry(&adapter->scan_pending_q,
1798 struct cmd_ctrl_node, list);
1799 list_del(&cmd_node->list);
1800 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
1801
1802 mwifiex_insert_cmd_to_pending_q(adapter, cmd_node, true);
1803 }
1804
1805 done:
1806 return ret;
1807 }
1808
1809 /*
1810 * This function prepares command for background scan query.
1811 *
1812 * Preparation includes -
1813 * - Setting command ID and proper size
1814 * - Setting background scan flush parameter
1815 * - Ensuring correct endian-ness
1816 */
1817 int mwifiex_cmd_802_11_bg_scan_query(struct host_cmd_ds_command *cmd)
1818 {
1819 struct host_cmd_ds_802_11_bg_scan_query *bg_query =
1820 &cmd->params.bg_scan_query;
1821
1822 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_BG_SCAN_QUERY);
1823 cmd->size = cpu_to_le16(sizeof(struct host_cmd_ds_802_11_bg_scan_query)
1824 + S_DS_GEN);
1825
1826 bg_query->flush = 1;
1827
1828 return 0;
1829 }
1830
1831 /*
1832 * This function inserts scan command node to the scan pending queue.
1833 */
1834 void
1835 mwifiex_queue_scan_cmd(struct mwifiex_private *priv,
1836 struct cmd_ctrl_node *cmd_node)
1837 {
1838 struct mwifiex_adapter *adapter = priv->adapter;
1839 unsigned long flags;
1840
1841 cmd_node->wait_q_enabled = true;
1842 cmd_node->condition = &adapter->scan_wait_q_woken;
1843 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
1844 list_add_tail(&cmd_node->list, &adapter->scan_pending_q);
1845 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
1846 }
1847
1848 /*
1849 * This function sends a scan command for all available channels to the
1850 * firmware, filtered on a specific SSID.
1851 */
1852 static int mwifiex_scan_specific_ssid(struct mwifiex_private *priv,
1853 struct cfg80211_ssid *req_ssid)
1854 {
1855 struct mwifiex_adapter *adapter = priv->adapter;
1856 int ret = 0;
1857 struct mwifiex_user_scan_cfg *scan_cfg;
1858
1859 if (!req_ssid)
1860 return -1;
1861
1862 if (adapter->scan_processing) {
1863 dev_dbg(adapter->dev, "cmd: Scan already in process...\n");
1864 return ret;
1865 }
1866
1867 if (priv->scan_block) {
1868 dev_dbg(adapter->dev,
1869 "cmd: Scan is blocked during association...\n");
1870 return ret;
1871 }
1872
1873 scan_cfg = kzalloc(sizeof(struct mwifiex_user_scan_cfg), GFP_KERNEL);
1874 if (!scan_cfg) {
1875 dev_err(adapter->dev, "failed to alloc scan_cfg\n");
1876 return -ENOMEM;
1877 }
1878
1879 memcpy(scan_cfg->ssid_list[0].ssid, req_ssid->ssid,
1880 req_ssid->ssid_len);
1881
1882 ret = mwifiex_scan_networks(priv, scan_cfg);
1883
1884 kfree(scan_cfg);
1885 return ret;
1886 }
1887
1888 /*
1889 * Sends IOCTL request to start a scan.
1890 *
1891 * This function allocates the IOCTL request buffer, fills it
1892 * with requisite parameters and calls the IOCTL handler.
1893 *
1894 * Scan command can be issued for both normal scan and specific SSID
1895 * scan, depending upon whether an SSID is provided or not.
1896 */
1897 int mwifiex_request_scan(struct mwifiex_private *priv,
1898 struct cfg80211_ssid *req_ssid)
1899 {
1900 int ret;
1901
1902 if (down_interruptible(&priv->async_sem)) {
1903 dev_err(priv->adapter->dev, "%s: acquire semaphore\n",
1904 __func__);
1905 return -1;
1906 }
1907 priv->scan_pending_on_block = true;
1908
1909 priv->adapter->scan_wait_q_woken = false;
1910
1911 if (req_ssid && req_ssid->ssid_len != 0)
1912 /* Specific SSID scan */
1913 ret = mwifiex_scan_specific_ssid(priv, req_ssid);
1914 else
1915 /* Normal scan */
1916 ret = mwifiex_scan_networks(priv, NULL);
1917
1918 if (!ret)
1919 ret = mwifiex_wait_queue_complete(priv->adapter);
1920
1921 if (ret == -1) {
1922 priv->scan_pending_on_block = false;
1923 up(&priv->async_sem);
1924 }
1925
1926 return ret;
1927 }
1928
1929 /*
1930 * This function appends the vendor specific IE TLV to a buffer.
1931 */
1932 int
1933 mwifiex_cmd_append_vsie_tlv(struct mwifiex_private *priv,
1934 u16 vsie_mask, u8 **buffer)
1935 {
1936 int id, ret_len = 0;
1937 struct mwifiex_ie_types_vendor_param_set *vs_param_set;
1938
1939 if (!buffer)
1940 return 0;
1941 if (!(*buffer))
1942 return 0;
1943
1944 /*
1945 * Traverse through the saved vendor specific IE array and append
1946 * the selected(scan/assoc/adhoc) IE as TLV to the command
1947 */
1948 for (id = 0; id < MWIFIEX_MAX_VSIE_NUM; id++) {
1949 if (priv->vs_ie[id].mask & vsie_mask) {
1950 vs_param_set =
1951 (struct mwifiex_ie_types_vendor_param_set *)
1952 *buffer;
1953 vs_param_set->header.type =
1954 cpu_to_le16(TLV_TYPE_PASSTHROUGH);
1955 vs_param_set->header.len =
1956 cpu_to_le16((((u16) priv->vs_ie[id].ie[1])
1957 & 0x00FF) + 2);
1958 memcpy(vs_param_set->ie, priv->vs_ie[id].ie,
1959 le16_to_cpu(vs_param_set->header.len));
1960 *buffer += le16_to_cpu(vs_param_set->header.len) +
1961 sizeof(struct mwifiex_ie_types_header);
1962 ret_len += le16_to_cpu(vs_param_set->header.len) +
1963 sizeof(struct mwifiex_ie_types_header);
1964 }
1965 }
1966 return ret_len;
1967 }
1968
1969 /*
1970 * This function saves a beacon buffer of the current BSS descriptor.
1971 *
1972 * The current beacon buffer is saved so that it can be restored in the
1973 * following cases that makes the beacon buffer not to contain the current
1974 * ssid's beacon buffer.
1975 * - The current ssid was not found somehow in the last scan.
1976 * - The current ssid was the last entry of the scan table and overloaded.
1977 */
1978 void
1979 mwifiex_save_curr_bcn(struct mwifiex_private *priv)
1980 {
1981 struct mwifiex_bssdescriptor *curr_bss =
1982 &priv->curr_bss_params.bss_descriptor;
1983
1984 if (!curr_bss->beacon_buf_size)
1985 return;
1986
1987 /* allocate beacon buffer at 1st time; or if it's size has changed */
1988 if (!priv->curr_bcn_buf ||
1989 priv->curr_bcn_size != curr_bss->beacon_buf_size) {
1990 priv->curr_bcn_size = curr_bss->beacon_buf_size;
1991
1992 kfree(priv->curr_bcn_buf);
1993 priv->curr_bcn_buf = kmalloc(curr_bss->beacon_buf_size,
1994 GFP_ATOMIC);
1995 if (!priv->curr_bcn_buf) {
1996 dev_err(priv->adapter->dev,
1997 "failed to alloc curr_bcn_buf\n");
1998 return;
1999 }
2000 }
2001
2002 memcpy(priv->curr_bcn_buf, curr_bss->beacon_buf,
2003 curr_bss->beacon_buf_size);
2004 dev_dbg(priv->adapter->dev, "info: current beacon saved %d\n",
2005 priv->curr_bcn_size);
2006
2007 curr_bss->beacon_buf = priv->curr_bcn_buf;
2008
2009 /* adjust the pointers in the current BSS descriptor */
2010 if (curr_bss->bcn_wpa_ie)
2011 curr_bss->bcn_wpa_ie =
2012 (struct ieee_types_vendor_specific *)
2013 (curr_bss->beacon_buf +
2014 curr_bss->wpa_offset);
2015
2016 if (curr_bss->bcn_rsn_ie)
2017 curr_bss->bcn_rsn_ie = (struct ieee_types_generic *)
2018 (curr_bss->beacon_buf +
2019 curr_bss->rsn_offset);
2020
2021 if (curr_bss->bcn_ht_cap)
2022 curr_bss->bcn_ht_cap = (struct ieee80211_ht_cap *)
2023 (curr_bss->beacon_buf +
2024 curr_bss->ht_cap_offset);
2025
2026 if (curr_bss->bcn_ht_info)
2027 curr_bss->bcn_ht_info = (struct ieee80211_ht_info *)
2028 (curr_bss->beacon_buf +
2029 curr_bss->ht_info_offset);
2030
2031 if (curr_bss->bcn_bss_co_2040)
2032 curr_bss->bcn_bss_co_2040 =
2033 (u8 *) (curr_bss->beacon_buf +
2034 curr_bss->bss_co_2040_offset);
2035
2036 if (curr_bss->bcn_ext_cap)
2037 curr_bss->bcn_ext_cap = (u8 *) (curr_bss->beacon_buf +
2038 curr_bss->ext_cap_offset);
2039 }
2040
2041 /*
2042 * This function frees the current BSS descriptor beacon buffer.
2043 */
2044 void
2045 mwifiex_free_curr_bcn(struct mwifiex_private *priv)
2046 {
2047 kfree(priv->curr_bcn_buf);
2048 priv->curr_bcn_buf = NULL;
2049 }
Linux kernel - Deliverables
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