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ethernet: Remove casts to same type
[deliverable/linux.git] / drivers / net / wireless / mwifiex / scan.c
CommitLineData
5e6e3a92
BZ		 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
58union 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
65enum cipher_suite {
66 CIPHER_SUITE_TKIP,
67 CIPHER_SUITE_CCMP,
68 CIPHER_SUITE_MAX
69};
70static u8 mwifiex_wpa_oui[CIPHER_SUITE_MAX][4] = {
71 { 0x00, 0x50, 0xf2, 0x02 }, /* TKIP */
72 { 0x00, 0x50, 0xf2, 0x04 }, /* AES */
73};
74static 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 */
85static u8
86mwifiex_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 */
117static u8
118mwifiex_is_rsn_oui_present(struct mwifiex_bssdescriptor *bss_desc, u32 cipher)
119{
270e58e8
YAP		 120 u8 *oui;
121 struct ie_body *iebody;
5e6e3a92
BZ		 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) +
cff23cec 128 RSN_GTK_OUI_OFFSET);
5e6e3a92
BZ		 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 */
144static u8
145mwifiex_is_wpa_oui_present(struct mwifiex_bssdescriptor *bss_desc, u32 cipher)
146{
270e58e8
YAP		 147 u8 *oui;
148 struct ie_body *iebody;
5e6e3a92
BZ		 149 u8 ret = MWIFIEX_OUI_NOT_PRESENT;
150
cff23cec
YAP		 151 if (((bss_desc->bcn_wpa_ie) &&
152 ((*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id ==
153 WLAN_EID_WPA))) {
5e6e3a92
BZ		 154 iebody = (struct ie_body *) bss_desc->bcn_wpa_ie->data;
155 oui = &mwifiex_wpa_oui[cipher][0];
156 ret = mwifiex_search_oui_in_ie(iebody, oui);
157 if (ret)
158 return ret;
159 }
160 return ret;
161}
162
163/*
164 * This function compares two SSIDs and checks if they match.
165 */
166s32
b9be5f39 167mwifiex_ssid_cmp(struct cfg80211_ssid *ssid1, struct cfg80211_ssid *ssid2)
5e6e3a92
BZ		 168{
169 if (!ssid1 || !ssid2 || (ssid1->ssid_len != ssid2->ssid_len))
170 return -1;
171 return memcmp(ssid1->ssid, ssid2->ssid, ssid1->ssid_len);
172}
173
5e6e3a92
BZ		 174/*
175 * This function checks if wapi is enabled in driver and scanned network is
176 * compatible with it.
177 */
178static bool
cff23cec
YAP		 179mwifiex_is_bss_wapi(struct mwifiex_private *priv,
180 struct mwifiex_bssdescriptor *bss_desc)
5e6e3a92
BZ		 181{
182 if (priv->sec_info.wapi_enabled &&
183 (bss_desc->bcn_wapi_ie &&
184 ((*(bss_desc->bcn_wapi_ie)).ieee_hdr.element_id ==
185 WLAN_EID_BSS_AC_ACCESS_DELAY))) {
186 return true;
187 }
188 return false;
189}
190
191/*
192 * This function checks if driver is configured with no security mode and
193 * scanned network is compatible with it.
194 */
195static bool
cff23cec
YAP		 196mwifiex_is_bss_no_sec(struct mwifiex_private *priv,
197 struct mwifiex_bssdescriptor *bss_desc)
5e6e3a92 198{
5eb02e44
AK		 199 if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
200 !priv->sec_info.wpa2_enabled && ((!bss_desc->bcn_wpa_ie) ||
5e6e3a92 201 ((*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id !=
cff23cec
YAP		 202 WLAN_EID_WPA)) &&
203 ((!bss_desc->bcn_rsn_ie) ||
5e6e3a92 204 ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id !=
cff23cec
YAP		 205 WLAN_EID_RSN)) &&
206 !priv->sec_info.encryption_mode && !bss_desc->privacy) {
5e6e3a92
BZ		 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 */
216static bool
cff23cec
YAP		 217mwifiex_is_bss_static_wep(struct mwifiex_private *priv,
218 struct mwifiex_bssdescriptor *bss_desc)
5e6e3a92 219{
5eb02e44
AK		 220 if (priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
221 !priv->sec_info.wpa2_enabled && bss_desc->privacy) {
5e6e3a92
BZ		 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 */
231static bool
cff23cec
YAP		 232mwifiex_is_bss_wpa(struct mwifiex_private *priv,
233 struct mwifiex_bssdescriptor *bss_desc)
5e6e3a92 234{
5eb02e44
AK		 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))
5e6e3a92
BZ		 238 /*
239 * Privacy bit may NOT be set in some APs like
240 * LinkSys WRT54G && bss_desc->privacy
241 */
242 ) {
7c6fa2a8 243 dev_dbg(priv->adapter->dev, "info: %s: WPA:"
5e6e3a92 244 " wpa_ie=%#x wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s "
7c6fa2a8 245 "EncMode=%#x privacy=%#x\n", __func__,
5e6e3a92
BZ		 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,
5eb02e44 252 (priv->sec_info.wep_enabled) ? "e" : "d",
5e6e3a92
BZ		 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 */
266static bool
cff23cec
YAP		 267mwifiex_is_bss_wpa2(struct mwifiex_private *priv,
268 struct mwifiex_bssdescriptor *bss_desc)
5e6e3a92 269{
cff23cec
YAP		 270 if (!priv->sec_info.wep_enabled &&
271 !priv->sec_info.wpa_enabled &&
272 priv->sec_info.wpa2_enabled &&
273 ((bss_desc->bcn_rsn_ie) &&
274 ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id == WLAN_EID_RSN))) {
275 /*
276 * Privacy bit may NOT be set in some APs like
277 * LinkSys WRT54G && bss_desc->privacy
278 */
7c6fa2a8 279 dev_dbg(priv->adapter->dev, "info: %s: WPA2: "
5e6e3a92 280 " wpa_ie=%#x wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s "
7c6fa2a8 281 "EncMode=%#x privacy=%#x\n", __func__,
5e6e3a92
BZ		 282 (bss_desc->bcn_wpa_ie) ?
283 (*(bss_desc->bcn_wpa_ie)).
284 vend_hdr.element_id : 0,
285 (bss_desc->bcn_rsn_ie) ?
286 (*(bss_desc->bcn_rsn_ie)).
287 ieee_hdr.element_id : 0,
5eb02e44 288 (priv->sec_info.wep_enabled) ? "e" : "d",
5e6e3a92
BZ		 289 (priv->sec_info.wpa_enabled) ? "e" : "d",
290 (priv->sec_info.wpa2_enabled) ? "e" : "d",
291 priv->sec_info.encryption_mode,
292 bss_desc->privacy);
293 return true;
294 }
295 return false;
296}
297
298/*
299 * This function checks if adhoc AES is enabled in driver and scanned network is
300 * compatible with it.
301 */
302static bool
cff23cec
YAP		 303mwifiex_is_bss_adhoc_aes(struct mwifiex_private *priv,
304 struct mwifiex_bssdescriptor *bss_desc)
5e6e3a92 305{
5eb02e44 306 if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
cff23cec
YAP		 307 !priv->sec_info.wpa2_enabled &&
308 ((!bss_desc->bcn_wpa_ie) ||
309 ((*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id != WLAN_EID_WPA)) &&
310 ((!bss_desc->bcn_rsn_ie) ||
311 ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id != WLAN_EID_RSN)) &&
312 !priv->sec_info.encryption_mode && bss_desc->privacy) {
5e6e3a92
BZ		 313 return true;
314 }
315 return false;
316}
317
318/*
319 * This function checks if dynamic WEP is enabled in driver and scanned network
320 * is compatible with it.
321 */
322static bool
cff23cec
YAP		 323mwifiex_is_bss_dynamic_wep(struct mwifiex_private *priv,
324 struct mwifiex_bssdescriptor *bss_desc)
5e6e3a92 325{
5eb02e44 326 if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
cff23cec
YAP		 327 !priv->sec_info.wpa2_enabled &&
328 ((!bss_desc->bcn_wpa_ie) ||
329 ((*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id != WLAN_EID_WPA)) &&
330 ((!bss_desc->bcn_rsn_ie) ||
331 ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id != WLAN_EID_RSN)) &&
332 priv->sec_info.encryption_mode && bss_desc->privacy) {
5e6e3a92 333 dev_dbg(priv->adapter->dev, "info: %s: dynamic "
7c6fa2a8 334 "WEP: wpa_ie=%#x wpa2_ie=%#x "
5e6e3a92 335 "EncMode=%#x privacy=%#x\n",
7c6fa2a8 336 __func__,
5e6e3a92
BZ		 337 (bss_desc->bcn_wpa_ie) ?
338 (*(bss_desc->bcn_wpa_ie)).
339 vend_hdr.element_id : 0,
340 (bss_desc->bcn_rsn_ie) ?
341 (*(bss_desc->bcn_rsn_ie)).
342 ieee_hdr.element_id : 0,
343 priv->sec_info.encryption_mode,
344 bss_desc->privacy);
345 return true;
346 }
347 return false;
348}
349
350/*
351 * This function checks if a scanned network is compatible with the driver
352 * settings.
353 *
354 * WEP WPA WPA2 ad-hoc encrypt Network
355 * enabled enabled enabled AES mode Privacy WPA WPA2 Compatible
356 * 0 0 0 0 NONE 0 0 0 yes No security
357 * 0 1 0 0 x 1x 1 x yes WPA (disable
358 * HT if no AES)
359 * 0 0 1 0 x 1x x 1 yes WPA2 (disable
360 * HT if no AES)
361 * 0 0 0 1 NONE 1 0 0 yes Ad-hoc AES
362 * 1 0 0 0 NONE 1 0 0 yes Static WEP
363 * (disable HT)
364 * 0 0 0 0 !=NONE 1 0 0 yes Dynamic WEP
365 *
366 * Compatibility is not matched while roaming, except for mode.
367 */
368static s32
7c6fa2a8
AK		 369mwifiex_is_network_compatible(struct mwifiex_private *priv,
370 struct mwifiex_bssdescriptor *bss_desc, u32 mode)
5e6e3a92
BZ		 371{
372 struct mwifiex_adapter *adapter = priv->adapter;
5e6e3a92 373
5e6e3a92
BZ		 374 bss_desc->disable_11n = false;
375
376 /* Don't check for compatibility if roaming */
cff23cec
YAP		 377 if (priv->media_connected &&
378 (priv->bss_mode == NL80211_IFTYPE_STATION) &&
379 (bss_desc->bss_mode == NL80211_IFTYPE_STATION))
7c6fa2a8 380 return 0;
5e6e3a92
BZ		 381
382 if (priv->wps.session_enable) {
383 dev_dbg(adapter->dev,
384 "info: return success directly in WPS period\n");
7c6fa2a8 385 return 0;
5e6e3a92
BZ		 386 }
387
cff23cec 388 if (mwifiex_is_bss_wapi(priv, bss_desc)) {
5e6e3a92 389 dev_dbg(adapter->dev, "info: return success for WAPI AP\n");
7c6fa2a8 390 return 0;
5e6e3a92
BZ		 391 }
392
393 if (bss_desc->bss_mode == mode) {
cff23cec 394 if (mwifiex_is_bss_no_sec(priv, bss_desc)) {
5e6e3a92 395 /* No security */
7c6fa2a8 396 return 0;
cff23cec 397 } else if (mwifiex_is_bss_static_wep(priv, bss_desc)) {
5e6e3a92
BZ		 398 /* Static WEP enabled */
399 dev_dbg(adapter->dev, "info: Disable 11n in WEP mode.\n");
400 bss_desc->disable_11n = true;
7c6fa2a8 401 return 0;
cff23cec 402 } else if (mwifiex_is_bss_wpa(priv, bss_desc)) {
5e6e3a92 403 /* WPA enabled */
cff23cec
YAP		 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
411 (bss_desc, CIPHER_SUITE_TKIP)) {
5e6e3a92
BZ		 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 }
7c6fa2a8 420 return 0;
cff23cec 421 } else if (mwifiex_is_bss_wpa2(priv, bss_desc)) {
5e6e3a92 422 /* WPA2 enabled */
cff23cec
YAP		 423 if (((priv->adapter->config_bands & BAND_GN ||
424 priv->adapter->config_bands & BAND_AN) &&
425 bss_desc->bcn_ht_cap) &&
426 !mwifiex_is_rsn_oui_present(bss_desc,
427 CIPHER_SUITE_CCMP)) {
428
429 if (mwifiex_is_rsn_oui_present
430 (bss_desc, CIPHER_SUITE_TKIP)) {
5e6e3a92
BZ		 431 dev_dbg(adapter->dev,
432 "info: Disable 11n if AES "
433 "is not supported by AP\n");
434 bss_desc->disable_11n = true;
435 } else {
436 return -1;
437 }
438 }
7c6fa2a8 439 return 0;
cff23cec 440 } else if (mwifiex_is_bss_adhoc_aes(priv, bss_desc)) {
5e6e3a92 441 /* Ad-hoc AES enabled */
7c6fa2a8 442 return 0;
cff23cec 443 } else if (mwifiex_is_bss_dynamic_wep(priv, bss_desc)) {
5e6e3a92 444 /* Dynamic WEP enabled */
7c6fa2a8 445 return 0;
5e6e3a92
BZ		 446 }
447
448 /* Security doesn't match */
cff23cec
YAP		 449 dev_dbg(adapter->dev,
450 "info: %s: failed: wpa_ie=%#x wpa2_ie=%#x WEP=%s "
451 "WPA=%s WPA2=%s EncMode=%#x privacy=%#x\n", __func__,
452 (bss_desc->bcn_wpa_ie) ?
453 (*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id : 0,
454 (bss_desc->bcn_rsn_ie) ?
455 (*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id : 0,
456 (priv->sec_info.wep_enabled) ? "e" : "d",
457 (priv->sec_info.wpa_enabled) ? "e" : "d",
458 (priv->sec_info.wpa2_enabled) ? "e" : "d",
459 priv->sec_info.encryption_mode, bss_desc->privacy);
5e6e3a92
BZ		 460 return -1;
461 }
462
463 /* Mode doesn't match */
464 return -1;
465}
466
5e6e3a92
BZ		 467/*
468 * This function creates a channel list for the driver to scan, based
469 * on region/band information.
470 *
471 * This routine is used for any scan that is not provided with a
472 * specific channel list to scan.
473 */
474static void
475mwifiex_scan_create_channel_list(struct mwifiex_private *priv,
cff23cec
YAP		 476 const struct mwifiex_user_scan_cfg
477 *user_scan_in,
478 struct mwifiex_chan_scan_param_set
479 *scan_chan_list,
480 u8 filtered_scan)
5e6e3a92
BZ		 481{
482 enum ieee80211_band band;
483 struct ieee80211_supported_band *sband;
484 struct ieee80211_channel *ch;
485 struct mwifiex_adapter *adapter = priv->adapter;
486 int chan_idx = 0, i;
5e6e3a92
BZ		 487
488 for (band = 0; (band < IEEE80211_NUM_BANDS) ; band++) {
489
490 if (!priv->wdev->wiphy->bands[band])
491 continue;
492
493 sband = priv->wdev->wiphy->bands[band];
494
d06b7b9e 495 for (i = 0; (i < sband->n_channels) ; i++) {
5e6e3a92
BZ		 496 ch = &sband->channels[i];
497 if (ch->flags & IEEE80211_CHAN_DISABLED)
498 continue;
499 scan_chan_list[chan_idx].radio_type = band;
186630c2 500
5e6e3a92 501 if (user_scan_in &&
cff23cec 502 user_scan_in->chan_list[0].scan_time)
5e6e3a92
BZ		 503 scan_chan_list[chan_idx].max_scan_time =
504 cpu_to_le16((u16) user_scan_in->
505 chan_list[0].scan_time);
186630c2 506 else if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
5e6e3a92
BZ		 507 scan_chan_list[chan_idx].max_scan_time =
508 cpu_to_le16(adapter->passive_scan_time);
509 else
510 scan_chan_list[chan_idx].max_scan_time =
511 cpu_to_le16(adapter->active_scan_time);
186630c2
AK		 512
513 if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
5e6e3a92
BZ		 514 scan_chan_list[chan_idx].chan_scan_mode_bitmap
515 |= MWIFIEX_PASSIVE_SCAN;
516 else
517 scan_chan_list[chan_idx].chan_scan_mode_bitmap
518 &= ~MWIFIEX_PASSIVE_SCAN;
519 scan_chan_list[chan_idx].chan_number =
520 (u32) ch->hw_value;
521 if (filtered_scan) {
522 scan_chan_list[chan_idx].max_scan_time =
523 cpu_to_le16(adapter->specific_scan_time);
524 scan_chan_list[chan_idx].chan_scan_mode_bitmap
525 |= MWIFIEX_DISABLE_CHAN_FILT;
526 }
d06b7b9e 527 chan_idx++;
5e6e3a92
BZ		 528 }
529
530 }
531}
532
533/*
534 * This function constructs and sends multiple scan config commands to
535 * the firmware.
536 *
537 * Previous routines in the code flow have created a scan command configuration
538 * with any requested TLVs. This function splits the channel TLV into maximum
539 * channels supported per scan lists and sends the portion of the channel TLV,
540 * along with the other TLVs, to the firmware.
541 */
542static int
600f5d90 543mwifiex_scan_channel_list(struct mwifiex_private *priv,
5e6e3a92
BZ		 544 u32 max_chan_per_scan, u8 filtered_scan,
545 struct mwifiex_scan_cmd_config *scan_cfg_out,
546 struct mwifiex_ie_types_chan_list_param_set
547 *chan_tlv_out,
548 struct mwifiex_chan_scan_param_set *scan_chan_list)
549{
550 int ret = 0;
551 struct mwifiex_chan_scan_param_set *tmp_chan_list;
552 struct mwifiex_chan_scan_param_set *start_chan;
553
554 u32 tlv_idx;
555 u32 total_scan_time;
556 u32 done_early;
557
558 if (!scan_cfg_out || !chan_tlv_out || !scan_chan_list) {
559 dev_dbg(priv->adapter->dev,
560 "info: Scan: Null detect: %p, %p, %p\n",
561 scan_cfg_out, chan_tlv_out, scan_chan_list);
562 return -1;
563 }
564
565 chan_tlv_out->header.type = cpu_to_le16(TLV_TYPE_CHANLIST);
566
567 /* Set the temp channel struct pointer to the start of the desired
568 list */
569 tmp_chan_list = scan_chan_list;
570
571 /* Loop through the desired channel list, sending a new firmware scan
572 commands for each max_chan_per_scan channels (or for 1,6,11
573 individually if configured accordingly) */
574 while (tmp_chan_list->chan_number) {
575
576 tlv_idx = 0;
577 total_scan_time = 0;
578 chan_tlv_out->header.len = 0;
579 start_chan = tmp_chan_list;
580 done_early = false;
581
582 /*
583 * Construct the Channel TLV for the scan command. Continue to
584 * insert channel TLVs until:
585 * - the tlv_idx hits the maximum configured per scan command
586 * - the next channel to insert is 0 (end of desired channel
587 * list)
588 * - done_early is set (controlling individual scanning of
589 * 1,6,11)
590 */
cff23cec
YAP		 591 while (tlv_idx < max_chan_per_scan &&
592 tmp_chan_list->chan_number && !done_early) {
5e6e3a92
BZ		 593
594 dev_dbg(priv->adapter->dev,
595 "info: Scan: Chan(%3d), Radio(%d),"
596 " Mode(%d, %d), Dur(%d)\n",
cff23cec
YAP		 597 tmp_chan_list->chan_number,
598 tmp_chan_list->radio_type,
599 tmp_chan_list->chan_scan_mode_bitmap
600 & MWIFIEX_PASSIVE_SCAN,
601 (tmp_chan_list->chan_scan_mode_bitmap
602 & MWIFIEX_DISABLE_CHAN_FILT) >> 1,
603 le16_to_cpu(tmp_chan_list->max_scan_time));
5e6e3a92
BZ		 604
605 /* Copy the current channel TLV to the command being
606 prepared */
607 memcpy(chan_tlv_out->chan_scan_param + tlv_idx,
608 tmp_chan_list,
609 sizeof(chan_tlv_out->chan_scan_param));
610
611 /* Increment the TLV header length by the size
612 appended */
613 chan_tlv_out->header.len =
614 cpu_to_le16(le16_to_cpu(chan_tlv_out->header.len) +
615 (sizeof(chan_tlv_out->chan_scan_param)));
616
617 /*
618 * The tlv buffer length is set to the number of bytes
619 * of the between the channel tlv pointer and the start
620 * of the tlv buffer. This compensates for any TLVs
621 * that were appended before the channel list.
622 */
623 scan_cfg_out->tlv_buf_len = (u32) ((u8 *) chan_tlv_out -
624 scan_cfg_out->tlv_buf);
625
626 /* Add the size of the channel tlv header and the data
627 length */
628 scan_cfg_out->tlv_buf_len +=
629 (sizeof(chan_tlv_out->header)
630 + le16_to_cpu(chan_tlv_out->header.len));
631
632 /* Increment the index to the channel tlv we are
633 constructing */
634 tlv_idx++;
635
636 /* Count the total scan time per command */
637 total_scan_time +=
638 le16_to_cpu(tmp_chan_list->max_scan_time);
639
640 done_early = false;
641
642 /* Stop the loop if the *current* channel is in the
643 1,6,11 set and we are not filtering on a BSSID
644 or SSID. */
cff23cec
YAP		 645 if (!filtered_scan &&
646 (tmp_chan_list->chan_number == 1 ||
647 tmp_chan_list->chan_number == 6 ||
648 tmp_chan_list->chan_number == 11))
5e6e3a92
BZ		 649 done_early = true;
650
651 /* Increment the tmp pointer to the next channel to
652 be scanned */
653 tmp_chan_list++;
654
655 /* Stop the loop if the *next* channel is in the 1,6,11
656 set. This will cause it to be the only channel
657 scanned on the next interation */
cff23cec
YAP		 658 if (!filtered_scan &&
659 (tmp_chan_list->chan_number == 1 ||
660 tmp_chan_list->chan_number == 6 ||
661 tmp_chan_list->chan_number == 11))
5e6e3a92
BZ		 662 done_early = true;
663 }
664
665 /* The total scan time should be less than scan command timeout
666 value */
667 if (total_scan_time > MWIFIEX_MAX_TOTAL_SCAN_TIME) {
668 dev_err(priv->adapter->dev, "total scan time %dms"
669 " is over limit (%dms), scan skipped\n",
670 total_scan_time, MWIFIEX_MAX_TOTAL_SCAN_TIME);
671 ret = -1;
672 break;
673 }
674
675 priv->adapter->scan_channels = start_chan;
676
677 /* Send the scan command to the firmware with the specified
678 cfg */
600f5d90
AK		 679 ret = mwifiex_send_cmd_async(priv, HostCmd_CMD_802_11_SCAN,
680 HostCmd_ACT_GEN_SET, 0,
681 scan_cfg_out);
5e6e3a92
BZ		 682 if (ret)
683 break;
684 }
685
686 if (ret)
687 return -1;
688
689 return 0;
690}
691
692/*
693 * This function constructs a scan command configuration structure to use
694 * in scan commands.
695 *
696 * Application layer or other functions can invoke network scanning
697 * with a scan configuration supplied in a user scan configuration structure.
698 * This structure is used as the basis of one or many scan command configuration
699 * commands that are sent to the command processing module and eventually to the
700 * firmware.
701 *
702 * This function creates a scan command configuration structure based on the
703 * following user supplied parameters (if present):
704 * - SSID filter
705 * - BSSID filter
706 * - Number of Probes to be sent
707 * - Channel list
708 *
709 * If the SSID or BSSID filter is not present, the filter is disabled/cleared.
710 * If the number of probes is not set, adapter default setting is used.
711 */
712static void
cff23cec
YAP		 713mwifiex_config_scan(struct mwifiex_private *priv,
714 const struct mwifiex_user_scan_cfg *user_scan_in,
715 struct mwifiex_scan_cmd_config *scan_cfg_out,
716 struct mwifiex_ie_types_chan_list_param_set **chan_list_out,
717 struct mwifiex_chan_scan_param_set *scan_chan_list,
718 u8 *max_chan_per_scan, u8 *filtered_scan,
719 u8 *scan_current_only)
5e6e3a92
BZ		 720{
721 struct mwifiex_adapter *adapter = priv->adapter;
722 struct mwifiex_ie_types_num_probes *num_probes_tlv;
723 struct mwifiex_ie_types_wildcard_ssid_params *wildcard_ssid_tlv;
724 struct mwifiex_ie_types_rates_param_set *rates_tlv;
725 const u8 zero_mac[ETH_ALEN] = { 0, 0, 0, 0, 0, 0 };
726 u8 *tlv_pos;
727 u32 num_probes;
728 u32 ssid_len;
729 u32 chan_idx;
730 u32 scan_type;
731 u16 scan_dur;
732 u8 channel;
733 u8 radio_type;
be0b281e 734 int i;
5e6e3a92
BZ		 735 u8 ssid_filter;
736 u8 rates[MWIFIEX_SUPPORTED_RATES];
737 u32 rates_size;
738 struct mwifiex_ie_types_htcap *ht_cap;
739
740 /* The tlv_buf_len is calculated for each scan command. The TLVs added
741 in this routine will be preserved since the routine that sends the
742 command will append channelTLVs at *chan_list_out. The difference
743 between the *chan_list_out and the tlv_buf start will be used to
744 calculate the size of anything we add in this routine. */
745 scan_cfg_out->tlv_buf_len = 0;
746
747 /* Running tlv pointer. Assigned to chan_list_out at end of function
748 so later routines know where channels can be added to the command
749 buf */
750 tlv_pos = scan_cfg_out->tlv_buf;
751
752 /* Initialize the scan as un-filtered; the flag is later set to TRUE
753 below if a SSID or BSSID filter is sent in the command */
754 *filtered_scan = false;
755
756 /* Initialize the scan as not being only on the current channel. If
757 the channel list is customized, only contains one channel, and is
758 the active channel, this is set true and data flow is not halted. */
759 *scan_current_only = false;
760
761 if (user_scan_in) {
762
763 /* Default the ssid_filter flag to TRUE, set false under
764 certain wildcard conditions and qualified by the existence
765 of an SSID list before marking the scan as filtered */
766 ssid_filter = true;
767
768 /* Set the BSS type scan filter, use Adapter setting if
769 unset */
770 scan_cfg_out->bss_mode =
771 (user_scan_in->bss_mode ? (u8) user_scan_in->
772 bss_mode : (u8) adapter->scan_mode);
773
774 /* Set the number of probes to send, use Adapter setting
775 if unset */
776 num_probes =
777 (user_scan_in->num_probes ? user_scan_in->
778 num_probes : adapter->scan_probes);
779
780 /*
781 * Set the BSSID filter to the incoming configuration,
782 * if non-zero. If not set, it will remain disabled
783 * (all zeros).
784 */
785 memcpy(scan_cfg_out->specific_bssid,
786 user_scan_in->specific_bssid,
787 sizeof(scan_cfg_out->specific_bssid));
788
be0b281e
AK		 789 for (i = 0; i < user_scan_in->num_ssids; i++) {
790 ssid_len = user_scan_in->ssid_list[i].ssid_len;
5e6e3a92
BZ		 791
792 wildcard_ssid_tlv =
793 (struct mwifiex_ie_types_wildcard_ssid_params *)
794 tlv_pos;
795 wildcard_ssid_tlv->header.type =
796 cpu_to_le16(TLV_TYPE_WILDCARDSSID);
797 wildcard_ssid_tlv->header.len = cpu_to_le16(
798 (u16) (ssid_len + sizeof(wildcard_ssid_tlv->
799 max_ssid_length)));
fada1058 800
be0b281e
AK		 801 /*
802 * max_ssid_length = 0 tells firmware to perform
803 * specific scan for the SSID filled, whereas
804 * max_ssid_length = IEEE80211_MAX_SSID_LEN is for
805 * wildcard scan.
806 */
807 if (ssid_len)
808 wildcard_ssid_tlv->max_ssid_length = 0;
809 else
810 wildcard_ssid_tlv->max_ssid_length =
811 IEEE80211_MAX_SSID_LEN;
5e6e3a92
BZ		 812
813 memcpy(wildcard_ssid_tlv->ssid,
be0b281e 814 user_scan_in->ssid_list[i].ssid, ssid_len);
5e6e3a92
BZ		 815
816 tlv_pos += (sizeof(wildcard_ssid_tlv->header)
817 + le16_to_cpu(wildcard_ssid_tlv->header.len));
818
be0b281e
AK		 819 dev_dbg(adapter->dev, "info: scan: ssid[%d]: %s, %d\n",
820 i, wildcard_ssid_tlv->ssid,
5e6e3a92
BZ		 821 wildcard_ssid_tlv->max_ssid_length);
822
823 /* Empty wildcard ssid with a maxlen will match many or
824 potentially all SSIDs (maxlen == 32), therefore do
825 not treat the scan as
826 filtered. */
827 if (!ssid_len && wildcard_ssid_tlv->max_ssid_length)
828 ssid_filter = false;
5e6e3a92
BZ		 829 }
830
831 /*
832 * The default number of channels sent in the command is low to
833 * ensure the response buffer from the firmware does not
834 * truncate scan results. That is not an issue with an SSID
835 * or BSSID filter applied to the scan results in the firmware.
836 */
cff23cec
YAP		 837 if ((i && ssid_filter) ||
838 memcmp(scan_cfg_out->specific_bssid, &zero_mac,
839 sizeof(zero_mac)))
5e6e3a92
BZ		 840 *filtered_scan = true;
841 } else {
842 scan_cfg_out->bss_mode = (u8) adapter->scan_mode;
843 num_probes = adapter->scan_probes;
844 }
845
846 /*
847 * If a specific BSSID or SSID is used, the number of channels in the
848 * scan command will be increased to the absolute maximum.
849 */
850 if (*filtered_scan)
851 *max_chan_per_scan = MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN;
852 else
853 *max_chan_per_scan = MWIFIEX_CHANNELS_PER_SCAN_CMD;
854
855 /* If the input config or adapter has the number of Probes set,
856 add tlv */
857 if (num_probes) {
858
859 dev_dbg(adapter->dev, "info: scan: num_probes = %d\n",
cff23cec 860 num_probes);
5e6e3a92
BZ		 861
862 num_probes_tlv = (struct mwifiex_ie_types_num_probes *) tlv_pos;
863 num_probes_tlv->header.type = cpu_to_le16(TLV_TYPE_NUMPROBES);
864 num_probes_tlv->header.len =
865 cpu_to_le16(sizeof(num_probes_tlv->num_probes));
866 num_probes_tlv->num_probes = cpu_to_le16((u16) num_probes);
867
868 tlv_pos += sizeof(num_probes_tlv->header) +
869 le16_to_cpu(num_probes_tlv->header.len);
870
871 }
872
873 /* Append rates tlv */
874 memset(rates, 0, sizeof(rates));
875
876 rates_size = mwifiex_get_supported_rates(priv, rates);
877
878 rates_tlv = (struct mwifiex_ie_types_rates_param_set *) tlv_pos;
879 rates_tlv->header.type = cpu_to_le16(WLAN_EID_SUPP_RATES);
880 rates_tlv->header.len = cpu_to_le16((u16) rates_size);
881 memcpy(rates_tlv->rates, rates, rates_size);
882 tlv_pos += sizeof(rates_tlv->header) + rates_size;
883
884 dev_dbg(adapter->dev, "info: SCAN_CMD: Rates size = %d\n", rates_size);
885
cff23cec
YAP		 886 if (ISSUPP_11NENABLED(priv->adapter->fw_cap_info) &&
887 (priv->adapter->config_bands & BAND_GN ||
888 priv->adapter->config_bands & BAND_AN)) {
5e6e3a92
BZ		 889 ht_cap = (struct mwifiex_ie_types_htcap *) tlv_pos;
890 memset(ht_cap, 0, sizeof(struct mwifiex_ie_types_htcap));
891 ht_cap->header.type = cpu_to_le16(WLAN_EID_HT_CAPABILITY);
892 ht_cap->header.len =
893 cpu_to_le16(sizeof(struct ieee80211_ht_cap));
a46b7b5c
AK		 894 radio_type =
895 mwifiex_band_to_radio_type(priv->adapter->config_bands);
896 mwifiex_fill_cap_info(priv, radio_type, ht_cap);
5e6e3a92
BZ		 897 tlv_pos += sizeof(struct mwifiex_ie_types_htcap);
898 }
899
900 /* Append vendor specific IE TLV */
901 mwifiex_cmd_append_vsie_tlv(priv, MWIFIEX_VSIE_MASK_SCAN, &tlv_pos);
902
903 /*
904 * Set the output for the channel TLV to the address in the tlv buffer
905 * past any TLVs that were added in this function (SSID, num_probes).
906 * Channel TLVs will be added past this for each scan command,
907 * preserving the TLVs that were previously added.
908 */
909 *chan_list_out =
910 (struct mwifiex_ie_types_chan_list_param_set *) tlv_pos;
911
912 if (user_scan_in && user_scan_in->chan_list[0].chan_number) {
913
914 dev_dbg(adapter->dev, "info: Scan: Using supplied channel list\n");
915
916 for (chan_idx = 0;
cff23cec
YAP		 917 chan_idx < MWIFIEX_USER_SCAN_CHAN_MAX &&
918 user_scan_in->chan_list[chan_idx].chan_number;
5e6e3a92
BZ		 919 chan_idx++) {
920
921 channel = user_scan_in->chan_list[chan_idx].chan_number;
922 (scan_chan_list + chan_idx)->chan_number = channel;
923
924 radio_type =
925 user_scan_in->chan_list[chan_idx].radio_type;
926 (scan_chan_list + chan_idx)->radio_type = radio_type;
927
928 scan_type = user_scan_in->chan_list[chan_idx].scan_type;
929
930 if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE)
931 (scan_chan_list +
932 chan_idx)->chan_scan_mode_bitmap
933 |= MWIFIEX_PASSIVE_SCAN;
934 else
935 (scan_chan_list +
936 chan_idx)->chan_scan_mode_bitmap
937 &= ~MWIFIEX_PASSIVE_SCAN;
938
939 if (user_scan_in->chan_list[chan_idx].scan_time) {
940 scan_dur = (u16) user_scan_in->
941 chan_list[chan_idx].scan_time;
942 } else {
943 if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE)
944 scan_dur = adapter->passive_scan_time;
945 else if (*filtered_scan)
946 scan_dur = adapter->specific_scan_time;
947 else
948 scan_dur = adapter->active_scan_time;
949 }
950
951 (scan_chan_list + chan_idx)->min_scan_time =
952 cpu_to_le16(scan_dur);
953 (scan_chan_list + chan_idx)->max_scan_time =
954 cpu_to_le16(scan_dur);
955 }
956
957 /* Check if we are only scanning the current channel */
cff23cec
YAP		 958 if ((chan_idx == 1) &&
959 (user_scan_in->chan_list[0].chan_number ==
960 priv->curr_bss_params.bss_descriptor.channel)) {
5e6e3a92
BZ		 961 *scan_current_only = true;
962 dev_dbg(adapter->dev,
963 "info: Scan: Scanning current channel only\n");
964 }
965
966 } else {
967 dev_dbg(adapter->dev,
cff23cec 968 "info: Scan: Creating full region channel list\n");
5e6e3a92
BZ		 969 mwifiex_scan_create_channel_list(priv, user_scan_in,
970 scan_chan_list,
971 *filtered_scan);
972 }
973}
974
975/*
976 * This function inspects the scan response buffer for pointers to
977 * expected TLVs.
978 *
979 * TLVs can be included at the end of the scan response BSS information.
980 *
981 * Data in the buffer is parsed pointers to TLVs that can potentially
982 * be passed back in the response.
983 */
984static void
985mwifiex_ret_802_11_scan_get_tlv_ptrs(struct mwifiex_adapter *adapter,
986 struct mwifiex_ie_types_data *tlv,
987 u32 tlv_buf_size, u32 req_tlv_type,
988 struct mwifiex_ie_types_data **tlv_data)
989{
990 struct mwifiex_ie_types_data *current_tlv;
991 u32 tlv_buf_left;
992 u32 tlv_type;
993 u32 tlv_len;
994
995 current_tlv = tlv;
996 tlv_buf_left = tlv_buf_size;
997 *tlv_data = NULL;
998
999 dev_dbg(adapter->dev, "info: SCAN_RESP: tlv_buf_size = %d\n",
cff23cec 1000 tlv_buf_size);
5e6e3a92
BZ		 1001
1002 while (tlv_buf_left >= sizeof(struct mwifiex_ie_types_header)) {
1003
1004 tlv_type = le16_to_cpu(current_tlv->header.type);
1005 tlv_len = le16_to_cpu(current_tlv->header.len);
1006
1007 if (sizeof(tlv->header) + tlv_len > tlv_buf_left) {
1008 dev_err(adapter->dev, "SCAN_RESP: TLV buffer corrupt\n");
1009 break;
1010 }
1011
1012 if (req_tlv_type == tlv_type) {
1013 switch (tlv_type) {
1014 case TLV_TYPE_TSFTIMESTAMP:
1015 dev_dbg(adapter->dev, "info: SCAN_RESP: TSF "
1016 "timestamp TLV, len = %d\n", tlv_len);
1017 *tlv_data = (struct mwifiex_ie_types_data *)
1018 current_tlv;
1019 break;
1020 case TLV_TYPE_CHANNELBANDLIST:
1021 dev_dbg(adapter->dev, "info: SCAN_RESP: channel"
1022 " band list TLV, len = %d\n", tlv_len);
1023 *tlv_data = (struct mwifiex_ie_types_data *)
1024 current_tlv;
1025 break;
1026 default:
1027 dev_err(adapter->dev,
1028 "SCAN_RESP: unhandled TLV = %d\n",
1029 tlv_type);
1030 /* Give up, this seems corrupted */
1031 return;
1032 }
1033 }
1034
1035 if (*tlv_data)
1036 break;
1037
1038
1039 tlv_buf_left -= (sizeof(tlv->header) + tlv_len);
1040 current_tlv =
1041 (struct mwifiex_ie_types_data *) (current_tlv->data +
1042 tlv_len);
1043
1044 } /* while */
1045}
1046
1047/*
7c6fa2a8
AK		 1048 * This function parses provided beacon buffer and updates
1049 * respective fields in bss descriptor structure.
5e6e3a92 1050 */
9558a407
AK		 1051int mwifiex_update_bss_desc_with_ie(struct mwifiex_adapter *adapter,
1052 struct mwifiex_bssdescriptor *bss_entry)
5e6e3a92
BZ		 1053{
1054 int ret = 0;
1055 u8 element_id;
1056 struct ieee_types_fh_param_set *fh_param_set;
1057 struct ieee_types_ds_param_set *ds_param_set;
1058 struct ieee_types_cf_param_set *cf_param_set;
1059 struct ieee_types_ibss_param_set *ibss_param_set;
5e6e3a92
BZ		 1060 u8 *current_ptr;
1061 u8 *rate;
1062 u8 element_len;
1063 u16 total_ie_len;
1064 u8 bytes_to_copy;
1065 u8 rate_size;
5e6e3a92 1066 u8 found_data_rate_ie;
7c6fa2a8 1067 u32 bytes_left;
5e6e3a92
BZ		 1068 struct ieee_types_vendor_specific *vendor_ie;
1069 const u8 wpa_oui[4] = { 0x00, 0x50, 0xf2, 0x01 };
1070 const u8 wmm_oui[4] = { 0x00, 0x50, 0xf2, 0x02 };
1071
1072 found_data_rate_ie = false;
1073 rate_size = 0;
9558a407
AK		 1074 current_ptr = bss_entry->beacon_buf;
1075 bytes_left = bss_entry->beacon_buf_size;
5e6e3a92
BZ		 1076
1077 /* Process variable IE */
7c6fa2a8 1078 while (bytes_left >= 2) {
5e6e3a92
BZ		 1079 element_id = *current_ptr;
1080 element_len = *(current_ptr + 1);
1081 total_ie_len = element_len + sizeof(struct ieee_types_header);
1082
7c6fa2a8 1083 if (bytes_left < total_ie_len) {
5e6e3a92
BZ		 1084 dev_err(adapter->dev, "err: InterpretIE: in processing"
1085 " IE, bytes left < IE length\n");
7c6fa2a8 1086 return -1;
5e6e3a92
BZ		 1087 }
1088 switch (element_id) {
1089 case WLAN_EID_SSID:
1090 bss_entry->ssid.ssid_len = element_len;
1091 memcpy(bss_entry->ssid.ssid, (current_ptr + 2),
1092 element_len);
cff23cec
YAP		 1093 dev_dbg(adapter->dev,
1094 "info: InterpretIE: ssid: %-32s\n",
1095 bss_entry->ssid.ssid);
5e6e3a92
BZ		 1096 break;
1097
1098 case WLAN_EID_SUPP_RATES:
1099 memcpy(bss_entry->data_rates, current_ptr + 2,
1100 element_len);
1101 memcpy(bss_entry->supported_rates, current_ptr + 2,
1102 element_len);
1103 rate_size = element_len;
1104 found_data_rate_ie = true;
1105 break;
1106
1107 case WLAN_EID_FH_PARAMS:
1108 fh_param_set =
1109 (struct ieee_types_fh_param_set *) current_ptr;
1110 memcpy(&bss_entry->phy_param_set.fh_param_set,
1111 fh_param_set,
1112 sizeof(struct ieee_types_fh_param_set));
1113 break;
1114
1115 case WLAN_EID_DS_PARAMS:
1116 ds_param_set =
1117 (struct ieee_types_ds_param_set *) current_ptr;
1118
1119 bss_entry->channel = ds_param_set->current_chan;
1120
1121 memcpy(&bss_entry->phy_param_set.ds_param_set,
1122 ds_param_set,
1123 sizeof(struct ieee_types_ds_param_set));
1124 break;
1125
1126 case WLAN_EID_CF_PARAMS:
1127 cf_param_set =
1128 (struct ieee_types_cf_param_set *) current_ptr;
1129 memcpy(&bss_entry->ss_param_set.cf_param_set,
1130 cf_param_set,
1131 sizeof(struct ieee_types_cf_param_set));
1132 break;
1133
1134 case WLAN_EID_IBSS_PARAMS:
1135 ibss_param_set =
1136 (struct ieee_types_ibss_param_set *)
1137 current_ptr;
1138 memcpy(&bss_entry->ss_param_set.ibss_param_set,
1139 ibss_param_set,
1140 sizeof(struct ieee_types_ibss_param_set));
1141 break;
1142
1143 case WLAN_EID_ERP_INFO:
1144 bss_entry->erp_flags = *(current_ptr + 2);
1145 break;
1146
1147 case WLAN_EID_EXT_SUPP_RATES:
1148 /*
1149 * Only process extended supported rate
1150 * if data rate is already found.
1151 * Data rate IE should come before
1152 * extended supported rate IE
1153 */
1154 if (found_data_rate_ie) {
1155 if ((element_len + rate_size) >
1156 MWIFIEX_SUPPORTED_RATES)
1157 bytes_to_copy =
1158 (MWIFIEX_SUPPORTED_RATES -
1159 rate_size);
1160 else
1161 bytes_to_copy = element_len;
1162
1163 rate = (u8 *) bss_entry->data_rates;
1164 rate += rate_size;
1165 memcpy(rate, current_ptr + 2, bytes_to_copy);
1166
1167 rate = (u8 *) bss_entry->supported_rates;
1168 rate += rate_size;
1169 memcpy(rate, current_ptr + 2, bytes_to_copy);
1170 }
1171 break;
1172
1173 case WLAN_EID_VENDOR_SPECIFIC:
1174 vendor_ie = (struct ieee_types_vendor_specific *)
1175 current_ptr;
1176
1177 if (!memcmp
1178 (vendor_ie->vend_hdr.oui, wpa_oui,
1179 sizeof(wpa_oui))) {
1180 bss_entry->bcn_wpa_ie =
1181 (struct ieee_types_vendor_specific *)
1182 current_ptr;
cff23cec
YAP		 1183 bss_entry->wpa_offset = (u16)
1184 (current_ptr - bss_entry->beacon_buf);
5e6e3a92
BZ		 1185 } else if (!memcmp(vendor_ie->vend_hdr.oui, wmm_oui,
1186 sizeof(wmm_oui))) {
1187 if (total_ie_len ==
cff23cec
YAP		 1188 sizeof(struct ieee_types_wmm_parameter) ||
1189 total_ie_len ==
5e6e3a92
BZ		 1190 sizeof(struct ieee_types_wmm_info))
1191 /*
1192 * Only accept and copy the WMM IE if
1193 * it matches the size expected for the
1194 * WMM Info IE or the WMM Parameter IE.
1195 */
1196 memcpy((u8 *) &bss_entry->wmm_ie,
1197 current_ptr, total_ie_len);
1198 }
1199 break;
1200 case WLAN_EID_RSN:
1201 bss_entry->bcn_rsn_ie =
1202 (struct ieee_types_generic *) current_ptr;
1203 bss_entry->rsn_offset = (u16) (current_ptr -
1204 bss_entry->beacon_buf);
1205 break;
1206 case WLAN_EID_BSS_AC_ACCESS_DELAY:
1207 bss_entry->bcn_wapi_ie =
1208 (struct ieee_types_generic *) current_ptr;
1209 bss_entry->wapi_offset = (u16) (current_ptr -
1210 bss_entry->beacon_buf);
1211 break;
1212 case WLAN_EID_HT_CAPABILITY:
1213 bss_entry->bcn_ht_cap = (struct ieee80211_ht_cap *)
1214 (current_ptr +
1215 sizeof(struct ieee_types_header));
1216 bss_entry->ht_cap_offset = (u16) (current_ptr +
1217 sizeof(struct ieee_types_header) -
1218 bss_entry->beacon_buf);
1219 break;
074d46d1
JB		 1220 case WLAN_EID_HT_OPERATION:
1221 bss_entry->bcn_ht_oper =
1222 (struct ieee80211_ht_operation *)(current_ptr +
5e6e3a92
BZ		 1223 sizeof(struct ieee_types_header));
1224 bss_entry->ht_info_offset = (u16) (current_ptr +
1225 sizeof(struct ieee_types_header) -
1226 bss_entry->beacon_buf);
1227 break;
1228 case WLAN_EID_BSS_COEX_2040:
1229 bss_entry->bcn_bss_co_2040 = (u8 *) (current_ptr +
1230 sizeof(struct ieee_types_header));
1231 bss_entry->bss_co_2040_offset = (u16) (current_ptr +
1232 sizeof(struct ieee_types_header) -
1233 bss_entry->beacon_buf);
1234 break;
1235 case WLAN_EID_EXT_CAPABILITY:
1236 bss_entry->bcn_ext_cap = (u8 *) (current_ptr +
1237 sizeof(struct ieee_types_header));
1238 bss_entry->ext_cap_offset = (u16) (current_ptr +
1239 sizeof(struct ieee_types_header) -
1240 bss_entry->beacon_buf);
1241 break;
5e6e3a92
BZ		 1242 default:
1243 break;
1244 }
1245
1246 current_ptr += element_len + 2;
1247
1248 /* Need to account for IE ID and IE Len */
7c6fa2a8 1249 bytes_left -= (element_len + 2);
5e6e3a92 1250
7c6fa2a8 1251 } /* while (bytes_left > 2) */
5e6e3a92
BZ		 1252 return ret;
1253}
1254
5e6e3a92
BZ		 1255/*
1256 * This function converts radio type scan parameter to a band configuration
1257 * to be used in join command.
1258 */
1259static u8
1260mwifiex_radio_type_to_band(u8 radio_type)
1261{
5e6e3a92
BZ		 1262 switch (radio_type) {
1263 case HostCmd_SCAN_RADIO_TYPE_A:
636c4598 1264 return BAND_A;
5e6e3a92
BZ		 1265 case HostCmd_SCAN_RADIO_TYPE_BG:
1266 default:
636c4598 1267 return BAND_G;
5e6e3a92 1268 }
5e6e3a92
BZ		 1269}
1270
5e6e3a92
BZ		 1271/*
1272 * This is an internal function used to start a scan based on an input
1273 * configuration.
1274 *
1275 * This uses the input user scan configuration information when provided in
1276 * order to send the appropriate scan commands to firmware to populate or
1277 * update the internal driver scan table.
1278 */
711825a0
AK		 1279static int mwifiex_scan_networks(struct mwifiex_private *priv,
1280 const struct mwifiex_user_scan_cfg *user_scan_in)
5e6e3a92
BZ		 1281{
1282 int ret = 0;
1283 struct mwifiex_adapter *adapter = priv->adapter;
270e58e8
YAP		 1284 struct cmd_ctrl_node *cmd_node;
1285 union mwifiex_scan_cmd_config_tlv *scan_cfg_out;
5e6e3a92
BZ		 1286 struct mwifiex_ie_types_chan_list_param_set *chan_list_out;
1287 u32 buf_size;
1288 struct mwifiex_chan_scan_param_set *scan_chan_list;
5e6e3a92
BZ		 1289 u8 filtered_scan;
1290 u8 scan_current_chan_only;
1291 u8 max_chan_per_scan;
1292 unsigned long flags;
1293
600f5d90 1294 if (adapter->scan_processing) {
5e6e3a92
BZ		 1295 dev_dbg(adapter->dev, "cmd: Scan already in process...\n");
1296 return ret;
1297 }
1298
1299 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
1300 adapter->scan_processing = true;
1301 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
1302
600f5d90 1303 if (priv->scan_block) {
5e6e3a92
BZ		 1304 dev_dbg(adapter->dev,
1305 "cmd: Scan is blocked during association...\n");
1306 return ret;
1307 }
1308
1309 scan_cfg_out = kzalloc(sizeof(union mwifiex_scan_cmd_config_tlv),
cff23cec 1310 GFP_KERNEL);
5e6e3a92
BZ		 1311 if (!scan_cfg_out) {
1312 dev_err(adapter->dev, "failed to alloc scan_cfg_out\n");
b53575ec 1313 return -ENOMEM;
5e6e3a92
BZ		 1314 }
1315
1316 buf_size = sizeof(struct mwifiex_chan_scan_param_set) *
cff23cec 1317 MWIFIEX_USER_SCAN_CHAN_MAX;
5e6e3a92
BZ		 1318 scan_chan_list = kzalloc(buf_size, GFP_KERNEL);
1319 if (!scan_chan_list) {
1320 dev_err(adapter->dev, "failed to alloc scan_chan_list\n");
1321 kfree(scan_cfg_out);
b53575ec 1322 return -ENOMEM;
5e6e3a92
BZ		 1323 }
1324
cff23cec
YAP		 1325 mwifiex_config_scan(priv, user_scan_in, &scan_cfg_out->config,
1326 &chan_list_out, scan_chan_list, &max_chan_per_scan,
1327 &filtered_scan, &scan_current_chan_only);
5e6e3a92 1328
600f5d90
AK		 1329 ret = mwifiex_scan_channel_list(priv, max_chan_per_scan, filtered_scan,
1330 &scan_cfg_out->config, chan_list_out,
1331 scan_chan_list);
5e6e3a92
BZ		 1332
1333 /* Get scan command from scan_pending_q and put to cmd_pending_q */
1334 if (!ret) {
1335 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
1336 if (!list_empty(&adapter->scan_pending_q)) {
1337 cmd_node = list_first_entry(&adapter->scan_pending_q,
cff23cec 1338 struct cmd_ctrl_node, list);
5e6e3a92
BZ		 1339 list_del(&cmd_node->list);
1340 spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
cff23cec 1341 flags);
efaaa8b8 1342 adapter->cmd_queued = cmd_node;
5e6e3a92
BZ		 1343 mwifiex_insert_cmd_to_pending_q(adapter, cmd_node,
1344 true);
1345 } else {
1346 spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
1347 flags);
1348 }
5e6e3a92
BZ		 1349 } else {
1350 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
1351 adapter->scan_processing = true;
1352 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
1353 }
1354
1355 kfree(scan_cfg_out);
1356 kfree(scan_chan_list);
1357 return ret;
1358}
1359
711825a0
AK		 1360/*
1361 * Sends IOCTL request to start a scan with user configurations.
1362 *
1363 * This function allocates the IOCTL request buffer, fills it
1364 * with requisite parameters and calls the IOCTL handler.
1365 *
1366 * Upon completion, it also generates a wireless event to notify
1367 * applications.
1368 */
1369int mwifiex_set_user_scan_ioctl(struct mwifiex_private *priv,
1370 struct mwifiex_user_scan_cfg *scan_req)
1371{
1372 int status;
1373
711825a0 1374 status = mwifiex_scan_networks(priv, scan_req);
38c9d664 1375 queue_work(priv->adapter->workqueue, &priv->adapter->main_work);
711825a0
AK		 1376
1377 return status;
1378}
1379
5e6e3a92
BZ		 1380/*
1381 * This function prepares a scan command to be sent to the firmware.
1382 *
1383 * This uses the scan command configuration sent to the command processing
1384 * module in command preparation stage to configure a scan command structure
1385 * to send to firmware.
1386 *
1387 * The fixed fields specifying the BSS type and BSSID filters as well as a
1388 * variable number/length of TLVs are sent in the command to firmware.
1389 *
1390 * Preparation also includes -
1391 * - Setting command ID, and proper size
1392 * - Ensuring correct endian-ness
1393 */
a5ffddb7
AK		 1394int mwifiex_cmd_802_11_scan(struct host_cmd_ds_command *cmd,
1395 struct mwifiex_scan_cmd_config *scan_cfg)
5e6e3a92
BZ		 1396{
1397 struct host_cmd_ds_802_11_scan *scan_cmd = &cmd->params.scan;
5e6e3a92
BZ		 1398
1399 /* Set fixed field variables in scan command */
1400 scan_cmd->bss_mode = scan_cfg->bss_mode;
1401 memcpy(scan_cmd->bssid, scan_cfg->specific_bssid,
1402 sizeof(scan_cmd->bssid));
1403 memcpy(scan_cmd->tlv_buffer, scan_cfg->tlv_buf, scan_cfg->tlv_buf_len);
1404
1405 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_SCAN);
1406
1407 /* Size is equal to the sizeof(fixed portions) + the TLV len + header */
1408 cmd->size = cpu_to_le16((u16) (sizeof(scan_cmd->bss_mode)
1409 + sizeof(scan_cmd->bssid)
1410 + scan_cfg->tlv_buf_len + S_DS_GEN));
1411
1412 return 0;
1413}
1414
7c6fa2a8
AK		 1415/*
1416 * This function checks compatibility of requested network with current
1417 * driver settings.
1418 */
1419int mwifiex_check_network_compatibility(struct mwifiex_private *priv,
1420 struct mwifiex_bssdescriptor *bss_desc)
1421{
1422 int ret = -1;
1423
1424 if (!bss_desc)
1425 return -1;
1426
6685d109
YAP		 1427 if ((mwifiex_get_cfp(priv, (u8) bss_desc->bss_band,
1428 (u16) bss_desc->channel, 0))) {
7c6fa2a8
AK		 1429 switch (priv->bss_mode) {
1430 case NL80211_IFTYPE_STATION:
1431 case NL80211_IFTYPE_ADHOC:
1432 ret = mwifiex_is_network_compatible(priv, bss_desc,
1433 priv->bss_mode);
1434 if (ret)
1435 dev_err(priv->adapter->dev, "cannot find ssid "
1436 "%s\n", bss_desc->ssid.ssid);
1437 break;
1438 default:
1439 ret = 0;
1440 }
1441 }
1442
1443 return ret;
1444}
1445
9558a407
AK		 1446static int mwifiex_update_curr_bss_params(struct mwifiex_private *priv,
1447 struct cfg80211_bss *bss)
7c6fa2a8 1448{
db652e4b 1449 struct mwifiex_bssdescriptor *bss_desc;
7c6fa2a8
AK		 1450 int ret;
1451 unsigned long flags;
7c6fa2a8
AK		 1452
1453 /* Allocate and fill new bss descriptor */
1454 bss_desc = kzalloc(sizeof(struct mwifiex_bssdescriptor),
1455 GFP_KERNEL);
1456 if (!bss_desc) {
1457 dev_err(priv->adapter->dev, " failed to alloc bss_desc\n");
1458 return -ENOMEM;
1459 }
5982b47a 1460
9558a407 1461 ret = mwifiex_fill_new_bss_desc(priv, bss, bss_desc);
7c6fa2a8
AK		 1462 if (ret)
1463 goto done;
1464
1465 ret = mwifiex_check_network_compatibility(priv, bss_desc);
1466 if (ret)
1467 goto done;
1468
1469 /* Update current bss descriptor parameters */
1470 spin_lock_irqsave(&priv->curr_bcn_buf_lock, flags);
1471 priv->curr_bss_params.bss_descriptor.bcn_wpa_ie = NULL;
1472 priv->curr_bss_params.bss_descriptor.wpa_offset = 0;
1473 priv->curr_bss_params.bss_descriptor.bcn_rsn_ie = NULL;
1474 priv->curr_bss_params.bss_descriptor.rsn_offset = 0;
1475 priv->curr_bss_params.bss_descriptor.bcn_wapi_ie = NULL;
1476 priv->curr_bss_params.bss_descriptor.wapi_offset = 0;
1477 priv->curr_bss_params.bss_descriptor.bcn_ht_cap = NULL;
1478 priv->curr_bss_params.bss_descriptor.ht_cap_offset =
1479 0;
074d46d1 1480 priv->curr_bss_params.bss_descriptor.bcn_ht_oper = NULL;
7c6fa2a8
AK		 1481 priv->curr_bss_params.bss_descriptor.ht_info_offset =
1482 0;
1483 priv->curr_bss_params.bss_descriptor.bcn_bss_co_2040 =
1484 NULL;
1485 priv->curr_bss_params.bss_descriptor.
1486 bss_co_2040_offset = 0;
1487 priv->curr_bss_params.bss_descriptor.bcn_ext_cap = NULL;
1488 priv->curr_bss_params.bss_descriptor.ext_cap_offset = 0;
1489 priv->curr_bss_params.bss_descriptor.beacon_buf = NULL;
1490 priv->curr_bss_params.bss_descriptor.beacon_buf_size =
1491 0;
1492
1493 /* Make a copy of current BSSID descriptor */
1494 memcpy(&priv->curr_bss_params.bss_descriptor, bss_desc,
cff23cec 1495 sizeof(priv->curr_bss_params.bss_descriptor));
7c6fa2a8
AK		 1496 mwifiex_save_curr_bcn(priv);
1497 spin_unlock_irqrestore(&priv->curr_bcn_buf_lock, flags);
1498
1499done:
1500 kfree(bss_desc);
7c6fa2a8
AK		 1501 return 0;
1502}
1503
5e6e3a92
BZ		 1504/*
1505 * This function handles the command response of scan.
1506 *
1507 * The response buffer for the scan command has the following
1508 * memory layout:
1509 *
1510 * .-------------------------------------------------------------.
1511 * | Header (4 * sizeof(t_u16)): Standard command response hdr |
1512 * .-------------------------------------------------------------.
1513 * | BufSize (t_u16) : sizeof the BSS Description data |
1514 * .-------------------------------------------------------------.
1515 * | NumOfSet (t_u8) : Number of BSS Descs returned |
1516 * .-------------------------------------------------------------.
1517 * | BSSDescription data (variable, size given in BufSize) |
1518 * .-------------------------------------------------------------.
1519 * | TLV data (variable, size calculated using Header->Size, |
1520 * | BufSize and sizeof the fixed fields above) |
1521 * .-------------------------------------------------------------.
1522 */
1523int mwifiex_ret_802_11_scan(struct mwifiex_private *priv,
600f5d90 1524 struct host_cmd_ds_command *resp)
5e6e3a92
BZ		 1525{
1526 int ret = 0;
1527 struct mwifiex_adapter *adapter = priv->adapter;
270e58e8
YAP		 1528 struct cmd_ctrl_node *cmd_node;
1529 struct host_cmd_ds_802_11_scan_rsp *scan_rsp;
5e6e3a92
BZ		 1530 struct mwifiex_ie_types_data *tlv_data;
1531 struct mwifiex_ie_types_tsf_timestamp *tsf_tlv;
1532 u8 *bss_info;
1533 u32 scan_resp_size;
1534 u32 bytes_left;
5e6e3a92
BZ		 1535 u32 idx;
1536 u32 tlv_buf_size;
5e6e3a92
BZ		 1537 struct mwifiex_chan_freq_power *cfp;
1538 struct mwifiex_ie_types_chan_band_list_param_set *chan_band_tlv;
1539 struct chan_band_param_set *chan_band;
5e6e3a92
BZ		 1540 u8 is_bgscan_resp;
1541 unsigned long flags;
5116f3ce 1542 struct cfg80211_bss *bss;
5e6e3a92
BZ		 1543
1544 is_bgscan_resp = (le16_to_cpu(resp->command)
cff23cec 1545 == HostCmd_CMD_802_11_BG_SCAN_QUERY);
5e6e3a92
BZ		 1546 if (is_bgscan_resp)
1547 scan_rsp = &resp->params.bg_scan_query_resp.scan_resp;
1548 else
1549 scan_rsp = &resp->params.scan_resp;
1550
1551
67a50035 1552 if (scan_rsp->number_of_sets > MWIFIEX_MAX_AP) {
5e6e3a92 1553 dev_err(adapter->dev, "SCAN_RESP: too many AP returned (%d)\n",
cff23cec 1554 scan_rsp->number_of_sets);
5e6e3a92
BZ		 1555 ret = -1;
1556 goto done;
1557 }
1558
1559 bytes_left = le16_to_cpu(scan_rsp->bss_descript_size);
1560 dev_dbg(adapter->dev, "info: SCAN_RESP: bss_descript_size %d\n",
cff23cec 1561 bytes_left);
5e6e3a92
BZ		 1562
1563 scan_resp_size = le16_to_cpu(resp->size);
1564
1565 dev_dbg(adapter->dev,
1566 "info: SCAN_RESP: returned %d APs before parsing\n",
cff23cec 1567 scan_rsp->number_of_sets);
5e6e3a92 1568
5e6e3a92
BZ		 1569 bss_info = scan_rsp->bss_desc_and_tlv_buffer;
1570
1571 /*
1572 * The size of the TLV buffer is equal to the entire command response
1573 * size (scan_resp_size) minus the fixed fields (sizeof()'s), the
1574 * BSS Descriptions (bss_descript_size as bytesLef) and the command
1575 * response header (S_DS_GEN)
1576 */
1577 tlv_buf_size = scan_resp_size - (bytes_left
1578 + sizeof(scan_rsp->bss_descript_size)
1579 + sizeof(scan_rsp->number_of_sets)
1580 + S_DS_GEN);
1581
1582 tlv_data = (struct mwifiex_ie_types_data *) (scan_rsp->
1583 bss_desc_and_tlv_buffer +
1584 bytes_left);
1585
1586 /* Search the TLV buffer space in the scan response for any valid
1587 TLVs */
1588 mwifiex_ret_802_11_scan_get_tlv_ptrs(adapter, tlv_data, tlv_buf_size,
1589 TLV_TYPE_TSFTIMESTAMP,
1590 (struct mwifiex_ie_types_data **)
1591 &tsf_tlv);
1592
1593 /* Search the TLV buffer space in the scan response for any valid
1594 TLVs */
1595 mwifiex_ret_802_11_scan_get_tlv_ptrs(adapter, tlv_data, tlv_buf_size,
1596 TLV_TYPE_CHANNELBANDLIST,
1597 (struct mwifiex_ie_types_data **)
1598 &chan_band_tlv);
1599
5e6e3a92 1600 for (idx = 0; idx < scan_rsp->number_of_sets && bytes_left; idx++) {
7c6fa2a8
AK		 1601 u8 bssid[ETH_ALEN];
1602 s32 rssi;
1603 const u8 *ie_buf;
1604 size_t ie_len;
6685d109 1605 u16 channel = 0;
b5abcf02 1606 u64 fw_tsf = 0;
7c6fa2a8
AK		 1607 u16 beacon_size = 0;
1608 u32 curr_bcn_bytes;
1609 u32 freq;
1610 u16 beacon_period;
1611 u16 cap_info_bitmap;
1612 u8 *current_ptr;
b5abcf02 1613 u64 timestamp;
7c6fa2a8 1614 struct mwifiex_bcn_param *bcn_param;
b5abcf02 1615 struct mwifiex_bss_priv *bss_priv;
7c6fa2a8
AK		 1616
1617 if (bytes_left >= sizeof(beacon_size)) {
1618 /* Extract & convert beacon size from command buffer */
1619 memcpy(&beacon_size, bss_info, sizeof(beacon_size));
1620 bytes_left -= sizeof(beacon_size);
1621 bss_info += sizeof(beacon_size);
5e6e3a92
BZ		 1622 }
1623
7c6fa2a8
AK		 1624 if (!beacon_size || beacon_size > bytes_left) {
1625 bss_info += bytes_left;
1626 bytes_left = 0;
1627 return -1;
1628 }
5e6e3a92 1629
7c6fa2a8
AK		 1630 /* Initialize the current working beacon pointer for this BSS
1631 * iteration */
1632 current_ptr = bss_info;
1633
1634 /* Advance the return beacon pointer past the current beacon */
1635 bss_info += beacon_size;
1636 bytes_left -= beacon_size;
1637
1638 curr_bcn_bytes = beacon_size;
1639
1640 /*
1641 * First 5 fields are bssid, RSSI, time stamp, beacon interval,
1642 * and capability information
1643 */
1644 if (curr_bcn_bytes < sizeof(struct mwifiex_bcn_param)) {
cff23cec
YAP		 1645 dev_err(adapter->dev,
1646 "InterpretIE: not enough bytes left\n");
7c6fa2a8
AK		 1647 continue;
1648 }
1649 bcn_param = (struct mwifiex_bcn_param *)current_ptr;
1650 current_ptr += sizeof(*bcn_param);
1651 curr_bcn_bytes -= sizeof(*bcn_param);
1652
1653 memcpy(bssid, bcn_param->bssid, ETH_ALEN);
1654
c9919be6
AK		 1655 rssi = (s32) bcn_param->rssi;
1656 rssi = (-rssi) * 100; /* Convert dBm to mBm */
1657 dev_dbg(adapter->dev, "info: InterpretIE: RSSI=%d\n", rssi);
7c6fa2a8 1658
b5abcf02 1659 timestamp = le64_to_cpu(bcn_param->timestamp);
7c6fa2a8
AK		 1660 beacon_period = le16_to_cpu(bcn_param->beacon_period);
1661
1662 cap_info_bitmap = le16_to_cpu(bcn_param->cap_info_bitmap);
1663 dev_dbg(adapter->dev, "info: InterpretIE: capabilities=0x%X\n",
cff23cec 1664 cap_info_bitmap);
7c6fa2a8
AK		 1665
1666 /* Rest of the current buffer are IE's */
1667 ie_buf = current_ptr;
1668 ie_len = curr_bcn_bytes;
cff23cec
YAP		 1669 dev_dbg(adapter->dev,
1670 "info: InterpretIE: IELength for this AP = %d\n",
1671 curr_bcn_bytes);
7c6fa2a8
AK		 1672
1673 while (curr_bcn_bytes >= sizeof(struct ieee_types_header)) {
1674 u8 element_id, element_len;
1675
1676 element_id = *current_ptr;
1677 element_len = *(current_ptr + 1);
1678 if (curr_bcn_bytes < element_len +
1679 sizeof(struct ieee_types_header)) {
cff23cec
YAP		 1680 dev_err(priv->adapter->dev,
1681 "%s: bytes left < IE length\n",
7c6fa2a8
AK		 1682 __func__);
1683 goto done;
5e6e3a92 1684 }
7c6fa2a8
AK		 1685 if (element_id == WLAN_EID_DS_PARAMS) {
1686 channel = *(u8 *) (current_ptr +
1687 sizeof(struct ieee_types_header));
5e6e3a92
BZ		 1688 break;
1689 }
7c6fa2a8
AK		 1690
1691 current_ptr += element_len +
1692 sizeof(struct ieee_types_header);
1693 curr_bcn_bytes -= element_len +
1694 sizeof(struct ieee_types_header);
5e6e3a92
BZ		 1695 }
1696
5e6e3a92
BZ		 1697 /*
1698 * If the TSF TLV was appended to the scan results, save this
b5abcf02
AK		 1699 * entry's TSF value in the fw_tsf field. It is the firmware's
1700 * TSF value at the time the beacon or probe response was
1701 * received.
5e6e3a92 1702 */
7c6fa2a8 1703 if (tsf_tlv)
b5abcf02
AK		 1704 memcpy(&fw_tsf, &tsf_tlv->tsf_data[idx * TSF_DATA_SIZE],
1705 sizeof(fw_tsf));
7c6fa2a8 1706
6685d109 1707 if (channel) {
7c6fa2a8
AK		 1708 struct ieee80211_channel *chan;
1709 u8 band;
1710
1711 band = BAND_G;
1712 if (chan_band_tlv) {
1713 chan_band =
1714 &chan_band_tlv->chan_band_param[idx];
1715 band = mwifiex_radio_type_to_band(
1716 chan_band->radio_type
1717 & (BIT(0) | BIT(1)));
1718 }
5e6e3a92 1719
6685d109 1720 cfp = mwifiex_get_cfp(priv, band, channel, 0);
5e6e3a92 1721
7c6fa2a8 1722 freq = cfp ? cfp->freq : 0;
5e6e3a92 1723
7c6fa2a8 1724 chan = ieee80211_get_channel(priv->wdev->wiphy, freq);
5e6e3a92 1725
7c6fa2a8 1726 if (chan && !(chan->flags & IEEE80211_CHAN_DISABLED)) {
5116f3ce 1727 bss = cfg80211_inform_bss(priv->wdev->wiphy,
b5abcf02 1728 chan, bssid, timestamp,
5116f3ce
AK		 1729 cap_info_bitmap, beacon_period,
1730 ie_buf, ie_len, rssi, GFP_KERNEL);
b5abcf02
AK		 1731 bss_priv = (struct mwifiex_bss_priv *)bss->priv;
1732 bss_priv->band = band;
1733 bss_priv->fw_tsf = fw_tsf;
cff23cec
YAP		 1734 if (priv->media_connected &&
1735 !memcmp(bssid,
1736 priv->curr_bss_params.bss_descriptor
1737 .mac_address, ETH_ALEN))
9558a407
AK		 1738 mwifiex_update_curr_bss_params(priv,
1739 bss);
1740 cfg80211_put_bss(bss);
7c6fa2a8
AK		 1741 }
1742 } else {
1743 dev_dbg(adapter->dev, "missing BSS channel IE\n");
1744 }
1745 }
5e6e3a92
BZ		 1746
1747 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
1748 if (list_empty(&adapter->scan_pending_q)) {
1749 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
1750 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
1751 adapter->scan_processing = false;
1752 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
5e6e3a92
BZ		 1753
1754 /* Need to indicate IOCTL complete */
600f5d90
AK		 1755 if (adapter->curr_cmd->wait_q_enabled) {
1756 adapter->cmd_wait_q.status = 0;
efaaa8b8 1757 mwifiex_complete_cmd(adapter, adapter->curr_cmd);
5e6e3a92
BZ		 1758 }
1759 if (priv->report_scan_result)
1760 priv->report_scan_result = false;
1761 if (priv->scan_pending_on_block) {
1762 priv->scan_pending_on_block = false;
1763 up(&priv->async_sem);
1764 }
1765
38c9d664 1766 if (priv->user_scan_cfg) {
cff23cec
YAP		 1767 dev_dbg(priv->adapter->dev,
1768 "info: %s: sending scan results\n", __func__);
38c9d664
AK		 1769 cfg80211_scan_done(priv->scan_request, 0);
1770 priv->scan_request = NULL;
1771 kfree(priv->user_scan_cfg);
1772 priv->user_scan_cfg = NULL;
1773 }
5e6e3a92
BZ		 1774 } else {
1775 /* Get scan command from scan_pending_q and put to
1776 cmd_pending_q */
1777 cmd_node = list_first_entry(&adapter->scan_pending_q,
1778 struct cmd_ctrl_node, list);
1779 list_del(&cmd_node->list);
1780 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
1781
1782 mwifiex_insert_cmd_to_pending_q(adapter, cmd_node, true);
1783 }
1784
1785done:
5e6e3a92
BZ		 1786 return ret;
1787}
1788
1789/*
1790 * This function prepares command for background scan query.
1791 *
1792 * Preparation includes -
1793 * - Setting command ID and proper size
1794 * - Setting background scan flush parameter
1795 * - Ensuring correct endian-ness
1796 */
572e8f3e 1797int mwifiex_cmd_802_11_bg_scan_query(struct host_cmd_ds_command *cmd)
5e6e3a92
BZ		 1798{
1799 struct host_cmd_ds_802_11_bg_scan_query *bg_query =
1800 &cmd->params.bg_scan_query;
1801
1802 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_BG_SCAN_QUERY);
1803 cmd->size = cpu_to_le16(sizeof(struct host_cmd_ds_802_11_bg_scan_query)
1804 + S_DS_GEN);
1805
1806 bg_query->flush = 1;
1807
1808 return 0;
1809}
1810
5e6e3a92
BZ		 1811/*
1812 * This function inserts scan command node to the scan pending queue.
1813 */
1814void
1815mwifiex_queue_scan_cmd(struct mwifiex_private *priv,
1816 struct cmd_ctrl_node *cmd_node)
1817{
1818 struct mwifiex_adapter *adapter = priv->adapter;
1819 unsigned long flags;
1820
600f5d90 1821 cmd_node->wait_q_enabled = true;
efaaa8b8 1822 cmd_node->condition = &adapter->scan_wait_q_woken;
5e6e3a92
BZ		 1823 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
1824 list_add_tail(&cmd_node->list, &adapter->scan_pending_q);
1825 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
1826}
1827
5e6e3a92
BZ		 1828/*
1829 * This function sends a scan command for all available channels to the
1830 * firmware, filtered on a specific SSID.
1831 */
1832static int mwifiex_scan_specific_ssid(struct mwifiex_private *priv,
b9be5f39 1833 struct cfg80211_ssid *req_ssid)
5e6e3a92
BZ		 1834{
1835 struct mwifiex_adapter *adapter = priv->adapter;
1836 int ret = 0;
1837 struct mwifiex_user_scan_cfg *scan_cfg;
1838
1839 if (!req_ssid)
1840 return -1;
1841
600f5d90 1842 if (adapter->scan_processing) {
5e6e3a92
BZ		 1843 dev_dbg(adapter->dev, "cmd: Scan already in process...\n");
1844 return ret;
1845 }
1846
600f5d90 1847 if (priv->scan_block) {
5e6e3a92
BZ		 1848 dev_dbg(adapter->dev,
1849 "cmd: Scan is blocked during association...\n");
1850 return ret;
1851 }
1852
5e6e3a92
BZ		 1853 scan_cfg = kzalloc(sizeof(struct mwifiex_user_scan_cfg), GFP_KERNEL);
1854 if (!scan_cfg) {
1855 dev_err(adapter->dev, "failed to alloc scan_cfg\n");
b53575ec 1856 return -ENOMEM;
5e6e3a92
BZ		 1857 }
1858
be0b281e
AK		 1859 scan_cfg->ssid_list = req_ssid;
1860 scan_cfg->num_ssids = 1;
5e6e3a92 1861
600f5d90 1862 ret = mwifiex_scan_networks(priv, scan_cfg);
5e6e3a92
BZ		 1863
1864 kfree(scan_cfg);
1865 return ret;
1866}
1867
1868/*
1869 * Sends IOCTL request to start a scan.
1870 *
1871 * This function allocates the IOCTL request buffer, fills it
1872 * with requisite parameters and calls the IOCTL handler.
1873 *
1874 * Scan command can be issued for both normal scan and specific SSID
1875 * scan, depending upon whether an SSID is provided or not.
1876 */
600f5d90 1877int mwifiex_request_scan(struct mwifiex_private *priv,
b9be5f39 1878 struct cfg80211_ssid *req_ssid)
5e6e3a92 1879{
270e58e8 1880 int ret;
5e6e3a92
BZ		 1881
1882 if (down_interruptible(&priv->async_sem)) {
1883 dev_err(priv->adapter->dev, "%s: acquire semaphore\n",
cff23cec 1884 __func__);
5e6e3a92
BZ		 1885 return -1;
1886 }
1887 priv->scan_pending_on_block = true;
1888
efaaa8b8 1889 priv->adapter->scan_wait_q_woken = false;
5e6e3a92
BZ		 1890
1891 if (req_ssid && req_ssid->ssid_len != 0)
1892 /* Specific SSID scan */
600f5d90 1893 ret = mwifiex_scan_specific_ssid(priv, req_ssid);
5e6e3a92
BZ		 1894 else
1895 /* Normal scan */
600f5d90
AK		 1896 ret = mwifiex_scan_networks(priv, NULL);
1897
1898 if (!ret)
1899 ret = mwifiex_wait_queue_complete(priv->adapter);
1900
5e6e3a92
BZ		 1901 if (ret == -1) {
1902 priv->scan_pending_on_block = false;
1903 up(&priv->async_sem);
1904 }
600f5d90 1905
5e6e3a92
BZ		 1906 return ret;
1907}
1908
1909/*
1910 * This function appends the vendor specific IE TLV to a buffer.
1911 */
1912int
1913mwifiex_cmd_append_vsie_tlv(struct mwifiex_private *priv,
1914 u16 vsie_mask, u8 **buffer)
1915{
1916 int id, ret_len = 0;
1917 struct mwifiex_ie_types_vendor_param_set *vs_param_set;
1918
1919 if (!buffer)
1920 return 0;
1921 if (!(*buffer))
1922 return 0;
1923
1924 /*
1925 * Traverse through the saved vendor specific IE array and append
1926 * the selected(scan/assoc/adhoc) IE as TLV to the command
1927 */
1928 for (id = 0; id < MWIFIEX_MAX_VSIE_NUM; id++) {
1929 if (priv->vs_ie[id].mask & vsie_mask) {
1930 vs_param_set =
1931 (struct mwifiex_ie_types_vendor_param_set *)
1932 *buffer;
1933 vs_param_set->header.type =
1934 cpu_to_le16(TLV_TYPE_PASSTHROUGH);
1935 vs_param_set->header.len =
1936 cpu_to_le16((((u16) priv->vs_ie[id].ie[1])
1937 & 0x00FF) + 2);
1938 memcpy(vs_param_set->ie, priv->vs_ie[id].ie,
1939 le16_to_cpu(vs_param_set->header.len));
1940 *buffer += le16_to_cpu(vs_param_set->header.len) +
1941 sizeof(struct mwifiex_ie_types_header);
1942 ret_len += le16_to_cpu(vs_param_set->header.len) +
1943 sizeof(struct mwifiex_ie_types_header);
1944 }
1945 }
1946 return ret_len;
1947}
1948
1949/*
1950 * This function saves a beacon buffer of the current BSS descriptor.
1951 *
1952 * The current beacon buffer is saved so that it can be restored in the
1953 * following cases that makes the beacon buffer not to contain the current
1954 * ssid's beacon buffer.
1955 * - The current ssid was not found somehow in the last scan.
1956 * - The current ssid was the last entry of the scan table and overloaded.
1957 */
1958void
1959mwifiex_save_curr_bcn(struct mwifiex_private *priv)
1960{
1961 struct mwifiex_bssdescriptor *curr_bss =
1962 &priv->curr_bss_params.bss_descriptor;
1963
030fe797
AK		 1964 if (!curr_bss->beacon_buf_size)
1965 return;
5e6e3a92 1966
030fe797
AK		 1967 /* allocate beacon buffer at 1st time; or if it's size has changed */
1968 if (!priv->curr_bcn_buf ||
cff23cec 1969 priv->curr_bcn_size != curr_bss->beacon_buf_size) {
5e6e3a92 1970 priv->curr_bcn_size = curr_bss->beacon_buf_size;
5e6e3a92 1971
030fe797 1972 kfree(priv->curr_bcn_buf);
5982b47a 1973 priv->curr_bcn_buf = kmalloc(curr_bss->beacon_buf_size,
cff23cec 1974 GFP_ATOMIC);
5e6e3a92
BZ		 1975 if (!priv->curr_bcn_buf) {
1976 dev_err(priv->adapter->dev,
cff23cec 1977 "failed to alloc curr_bcn_buf\n");
030fe797 1978 return;
5e6e3a92
BZ		 1979 }
1980 }
030fe797
AK		 1981
1982 memcpy(priv->curr_bcn_buf, curr_bss->beacon_buf,
cff23cec 1983 curr_bss->beacon_buf_size);
030fe797
AK		 1984 dev_dbg(priv->adapter->dev, "info: current beacon saved %d\n",
1985 priv->curr_bcn_size);
7c6fa2a8
AK		 1986
1987 curr_bss->beacon_buf = priv->curr_bcn_buf;
1988
1989 /* adjust the pointers in the current BSS descriptor */
1990 if (curr_bss->bcn_wpa_ie)
1991 curr_bss->bcn_wpa_ie =
1992 (struct ieee_types_vendor_specific *)
1993 (curr_bss->beacon_buf +
1994 curr_bss->wpa_offset);
1995
1996 if (curr_bss->bcn_rsn_ie)
1997 curr_bss->bcn_rsn_ie = (struct ieee_types_generic *)
1998 (curr_bss->beacon_buf +
1999 curr_bss->rsn_offset);
2000
2001 if (curr_bss->bcn_ht_cap)
2002 curr_bss->bcn_ht_cap = (struct ieee80211_ht_cap *)
2003 (curr_bss->beacon_buf +
2004 curr_bss->ht_cap_offset);
2005
074d46d1
JB		 2006 if (curr_bss->bcn_ht_oper)
2007 curr_bss->bcn_ht_oper = (struct ieee80211_ht_operation *)
7c6fa2a8
AK		 2008 (curr_bss->beacon_buf +
2009 curr_bss->ht_info_offset);
2010
2011 if (curr_bss->bcn_bss_co_2040)
2012 curr_bss->bcn_bss_co_2040 =
2013 (u8 *) (curr_bss->beacon_buf +
2014 curr_bss->bss_co_2040_offset);
2015
2016 if (curr_bss->bcn_ext_cap)
2017 curr_bss->bcn_ext_cap = (u8 *) (curr_bss->beacon_buf +
2018 curr_bss->ext_cap_offset);
5e6e3a92
BZ		 2019}
2020
2021/*
2022 * This function frees the current BSS descriptor beacon buffer.
2023 */
2024void
2025mwifiex_free_curr_bcn(struct mwifiex_private *priv)
2026{
2027 kfree(priv->curr_bcn_buf);
2028 priv->curr_bcn_buf = NULL;
2029}
Linux kernel - Deliverables
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