2 * Marvell Wireless LAN device driver: scan ioctl and command handling
4 * Copyright (C) 2011, Marvell International Ltd.
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.
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.
28 /* The maximum number of channels the firmware can scan per command */
29 #define MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN 14
31 #define MWIFIEX_DEF_CHANNELS_PER_SCAN_CMD 4
32 #define MWIFIEX_LIMIT_1_CHANNEL_PER_SCAN_CMD 15
33 #define MWIFIEX_LIMIT_2_CHANNELS_PER_SCAN_CMD 27
34 #define MWIFIEX_LIMIT_3_CHANNELS_PER_SCAN_CMD 35
36 /* Memory needed to store a max sized Channel List TLV for a firmware scan */
37 #define CHAN_TLV_MAX_SIZE (sizeof(struct mwifiex_ie_types_header) \
38 + (MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN \
39 *sizeof(struct mwifiex_chan_scan_param_set)))
41 /* Memory needed to store supported rate */
42 #define RATE_TLV_MAX_SIZE (sizeof(struct mwifiex_ie_types_rates_param_set) \
43 + HOSTCMD_SUPPORTED_RATES)
45 /* Memory needed to store a max number/size WildCard SSID TLV for a firmware
47 #define WILDCARD_SSID_TLV_MAX_SIZE \
48 (MWIFIEX_MAX_SSID_LIST_LENGTH * \
49 (sizeof(struct mwifiex_ie_types_wildcard_ssid_params) \
50 + IEEE80211_MAX_SSID_LEN))
52 /* Maximum memory needed for a mwifiex_scan_cmd_config with all TLVs at max */
53 #define MAX_SCAN_CFG_ALLOC (sizeof(struct mwifiex_scan_cmd_config) \
54 + sizeof(struct mwifiex_ie_types_num_probes) \
55 + sizeof(struct mwifiex_ie_types_htcap) \
58 + WILDCARD_SSID_TLV_MAX_SIZE)
61 union mwifiex_scan_cmd_config_tlv {
62 /* Scan configuration (variable length) */
63 struct mwifiex_scan_cmd_config config;
64 /* Max allocated block */
65 u8 config_alloc_buf[MAX_SCAN_CFG_ALLOC];
73 static u8 mwifiex_wpa_oui[CIPHER_SUITE_MAX][4] = {
74 { 0x00, 0x50, 0xf2, 0x02 }, /* TKIP */
75 { 0x00, 0x50, 0xf2, 0x04 }, /* AES */
77 static u8 mwifiex_rsn_oui[CIPHER_SUITE_MAX][4] = {
78 { 0x00, 0x0f, 0xac, 0x02 }, /* TKIP */
79 { 0x00, 0x0f, 0xac, 0x04 }, /* AES */
83 * This function parses a given IE for a given OUI.
85 * This is used to parse a WPA/RSN IE to find if it has
89 mwifiex_search_oui_in_ie(struct ie_body *iebody, u8 *oui)
93 count = iebody->ptk_cnt[0];
95 /* There could be multiple OUIs for PTK hence
97 2) Check all the OUIs for AES.
98 3) If one of them is AES then pass success. */
100 if (!memcmp(iebody->ptk_body, oui, sizeof(iebody->ptk_body)))
101 return MWIFIEX_OUI_PRESENT;
105 iebody = (struct ie_body *) ((u8 *) iebody +
106 sizeof(iebody->ptk_body));
109 pr_debug("info: %s: OUI is not found in PTK\n", __func__);
110 return MWIFIEX_OUI_NOT_PRESENT;
114 * This function checks if a given OUI is present in a RSN IE.
116 * The function first checks if a RSN IE is present or not in the
117 * BSS descriptor. It tries to locate the OUI only if such an IE is
121 mwifiex_is_rsn_oui_present(struct mwifiex_bssdescriptor *bss_desc, u32 cipher)
124 struct ie_body *iebody;
125 u8 ret = MWIFIEX_OUI_NOT_PRESENT;
127 if (((bss_desc->bcn_rsn_ie) && ((*(bss_desc->bcn_rsn_ie)).
128 ieee_hdr.element_id == WLAN_EID_RSN))) {
129 iebody = (struct ie_body *)
130 (((u8 *) bss_desc->bcn_rsn_ie->data) +
132 oui = &mwifiex_rsn_oui[cipher][0];
133 ret = mwifiex_search_oui_in_ie(iebody, oui);
141 * This function checks if a given OUI is present in a WPA IE.
143 * The function first checks if a WPA IE is present or not in the
144 * BSS descriptor. It tries to locate the OUI only if such an IE is
148 mwifiex_is_wpa_oui_present(struct mwifiex_bssdescriptor *bss_desc, u32 cipher)
151 struct ie_body *iebody;
152 u8 ret = MWIFIEX_OUI_NOT_PRESENT;
154 if (((bss_desc->bcn_wpa_ie) &&
155 ((*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id ==
157 iebody = (struct ie_body *) bss_desc->bcn_wpa_ie->data;
158 oui = &mwifiex_wpa_oui[cipher][0];
159 ret = mwifiex_search_oui_in_ie(iebody, oui);
167 * This function compares two SSIDs and checks if they match.
170 mwifiex_ssid_cmp(struct cfg80211_ssid *ssid1, struct cfg80211_ssid *ssid2)
172 if (!ssid1 || !ssid2 || (ssid1->ssid_len != ssid2->ssid_len))
174 return memcmp(ssid1->ssid, ssid2->ssid, ssid1->ssid_len);
178 * This function checks if wapi is enabled in driver and scanned network is
179 * compatible with it.
182 mwifiex_is_bss_wapi(struct mwifiex_private *priv,
183 struct mwifiex_bssdescriptor *bss_desc)
185 if (priv->sec_info.wapi_enabled &&
186 (bss_desc->bcn_wapi_ie &&
187 ((*(bss_desc->bcn_wapi_ie)).ieee_hdr.element_id ==
188 WLAN_EID_BSS_AC_ACCESS_DELAY))) {
195 * This function checks if driver is configured with no security mode and
196 * scanned network is compatible with it.
199 mwifiex_is_bss_no_sec(struct mwifiex_private *priv,
200 struct mwifiex_bssdescriptor *bss_desc)
202 if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
203 !priv->sec_info.wpa2_enabled && ((!bss_desc->bcn_wpa_ie) ||
204 ((*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id !=
206 ((!bss_desc->bcn_rsn_ie) ||
207 ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id !=
209 !priv->sec_info.encryption_mode && !bss_desc->privacy) {
216 * This function checks if static WEP is enabled in driver and scanned network
217 * is compatible with it.
220 mwifiex_is_bss_static_wep(struct mwifiex_private *priv,
221 struct mwifiex_bssdescriptor *bss_desc)
223 if (priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
224 !priv->sec_info.wpa2_enabled && bss_desc->privacy) {
231 * This function checks if wpa is enabled in driver and scanned network is
232 * compatible with it.
235 mwifiex_is_bss_wpa(struct mwifiex_private *priv,
236 struct mwifiex_bssdescriptor *bss_desc)
238 if (!priv->sec_info.wep_enabled && priv->sec_info.wpa_enabled &&
239 !priv->sec_info.wpa2_enabled && ((bss_desc->bcn_wpa_ie) &&
240 ((*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id == WLAN_EID_WPA))
242 * Privacy bit may NOT be set in some APs like
243 * LinkSys WRT54G && bss_desc->privacy
246 dev_dbg(priv->adapter->dev, "info: %s: WPA:"
247 " wpa_ie=%#x wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s "
248 "EncMode=%#x privacy=%#x\n", __func__,
249 (bss_desc->bcn_wpa_ie) ?
250 (*(bss_desc->bcn_wpa_ie)).
251 vend_hdr.element_id : 0,
252 (bss_desc->bcn_rsn_ie) ?
253 (*(bss_desc->bcn_rsn_ie)).
254 ieee_hdr.element_id : 0,
255 (priv->sec_info.wep_enabled) ? "e" : "d",
256 (priv->sec_info.wpa_enabled) ? "e" : "d",
257 (priv->sec_info.wpa2_enabled) ? "e" : "d",
258 priv->sec_info.encryption_mode,
266 * This function checks if wpa2 is enabled in driver and scanned network is
267 * compatible with it.
270 mwifiex_is_bss_wpa2(struct mwifiex_private *priv,
271 struct mwifiex_bssdescriptor *bss_desc)
273 if (!priv->sec_info.wep_enabled &&
274 !priv->sec_info.wpa_enabled &&
275 priv->sec_info.wpa2_enabled &&
276 ((bss_desc->bcn_rsn_ie) &&
277 ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id == WLAN_EID_RSN))) {
279 * Privacy bit may NOT be set in some APs like
280 * LinkSys WRT54G && bss_desc->privacy
282 dev_dbg(priv->adapter->dev, "info: %s: WPA2: "
283 " wpa_ie=%#x wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s "
284 "EncMode=%#x privacy=%#x\n", __func__,
285 (bss_desc->bcn_wpa_ie) ?
286 (*(bss_desc->bcn_wpa_ie)).
287 vend_hdr.element_id : 0,
288 (bss_desc->bcn_rsn_ie) ?
289 (*(bss_desc->bcn_rsn_ie)).
290 ieee_hdr.element_id : 0,
291 (priv->sec_info.wep_enabled) ? "e" : "d",
292 (priv->sec_info.wpa_enabled) ? "e" : "d",
293 (priv->sec_info.wpa2_enabled) ? "e" : "d",
294 priv->sec_info.encryption_mode,
302 * This function checks if adhoc AES is enabled in driver and scanned network is
303 * compatible with it.
306 mwifiex_is_bss_adhoc_aes(struct mwifiex_private *priv,
307 struct mwifiex_bssdescriptor *bss_desc)
309 if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
310 !priv->sec_info.wpa2_enabled &&
311 ((!bss_desc->bcn_wpa_ie) ||
312 ((*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id != WLAN_EID_WPA)) &&
313 ((!bss_desc->bcn_rsn_ie) ||
314 ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id != WLAN_EID_RSN)) &&
315 !priv->sec_info.encryption_mode && bss_desc->privacy) {
322 * This function checks if dynamic WEP is enabled in driver and scanned network
323 * is compatible with it.
326 mwifiex_is_bss_dynamic_wep(struct mwifiex_private *priv,
327 struct mwifiex_bssdescriptor *bss_desc)
329 if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
330 !priv->sec_info.wpa2_enabled &&
331 ((!bss_desc->bcn_wpa_ie) ||
332 ((*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id != WLAN_EID_WPA)) &&
333 ((!bss_desc->bcn_rsn_ie) ||
334 ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id != WLAN_EID_RSN)) &&
335 priv->sec_info.encryption_mode && bss_desc->privacy) {
336 dev_dbg(priv->adapter->dev, "info: %s: dynamic "
337 "WEP: wpa_ie=%#x wpa2_ie=%#x "
338 "EncMode=%#x privacy=%#x\n",
340 (bss_desc->bcn_wpa_ie) ?
341 (*(bss_desc->bcn_wpa_ie)).
342 vend_hdr.element_id : 0,
343 (bss_desc->bcn_rsn_ie) ?
344 (*(bss_desc->bcn_rsn_ie)).
345 ieee_hdr.element_id : 0,
346 priv->sec_info.encryption_mode,
354 * This function checks if a scanned network is compatible with the driver
357 * WEP WPA WPA2 ad-hoc encrypt Network
358 * enabled enabled enabled AES mode Privacy WPA WPA2 Compatible
359 * 0 0 0 0 NONE 0 0 0 yes No security
360 * 0 1 0 0 x 1x 1 x yes WPA (disable
362 * 0 0 1 0 x 1x x 1 yes WPA2 (disable
364 * 0 0 0 1 NONE 1 0 0 yes Ad-hoc AES
365 * 1 0 0 0 NONE 1 0 0 yes Static WEP
367 * 0 0 0 0 !=NONE 1 0 0 yes Dynamic WEP
369 * Compatibility is not matched while roaming, except for mode.
372 mwifiex_is_network_compatible(struct mwifiex_private *priv,
373 struct mwifiex_bssdescriptor *bss_desc, u32 mode)
375 struct mwifiex_adapter *adapter = priv->adapter;
377 bss_desc->disable_11n = false;
379 /* Don't check for compatibility if roaming */
380 if (priv->media_connected &&
381 (priv->bss_mode == NL80211_IFTYPE_STATION) &&
382 (bss_desc->bss_mode == NL80211_IFTYPE_STATION))
385 if (priv->wps.session_enable) {
386 dev_dbg(adapter->dev,
387 "info: return success directly in WPS period\n");
391 if (mwifiex_is_bss_wapi(priv, bss_desc)) {
392 dev_dbg(adapter->dev, "info: return success for WAPI AP\n");
396 if (bss_desc->bss_mode == mode) {
397 if (mwifiex_is_bss_no_sec(priv, bss_desc)) {
400 } else if (mwifiex_is_bss_static_wep(priv, bss_desc)) {
401 /* Static WEP enabled */
402 dev_dbg(adapter->dev, "info: Disable 11n in WEP mode.\n");
403 bss_desc->disable_11n = true;
405 } else if (mwifiex_is_bss_wpa(priv, bss_desc)) {
407 if (((priv->adapter->config_bands & BAND_GN ||
408 priv->adapter->config_bands & BAND_AN) &&
409 bss_desc->bcn_ht_cap) &&
410 !mwifiex_is_wpa_oui_present(bss_desc,
411 CIPHER_SUITE_CCMP)) {
413 if (mwifiex_is_wpa_oui_present
414 (bss_desc, CIPHER_SUITE_TKIP)) {
415 dev_dbg(adapter->dev,
416 "info: Disable 11n if AES "
417 "is not supported by AP\n");
418 bss_desc->disable_11n = true;
424 } else if (mwifiex_is_bss_wpa2(priv, bss_desc)) {
426 if (((priv->adapter->config_bands & BAND_GN ||
427 priv->adapter->config_bands & BAND_AN) &&
428 bss_desc->bcn_ht_cap) &&
429 !mwifiex_is_rsn_oui_present(bss_desc,
430 CIPHER_SUITE_CCMP)) {
432 if (mwifiex_is_rsn_oui_present
433 (bss_desc, CIPHER_SUITE_TKIP)) {
434 dev_dbg(adapter->dev,
435 "info: Disable 11n if AES "
436 "is not supported by AP\n");
437 bss_desc->disable_11n = true;
443 } else if (mwifiex_is_bss_adhoc_aes(priv, bss_desc)) {
444 /* Ad-hoc AES enabled */
446 } else if (mwifiex_is_bss_dynamic_wep(priv, bss_desc)) {
447 /* Dynamic WEP enabled */
451 /* Security doesn't match */
452 dev_dbg(adapter->dev,
453 "info: %s: failed: wpa_ie=%#x wpa2_ie=%#x WEP=%s "
454 "WPA=%s WPA2=%s EncMode=%#x privacy=%#x\n", __func__,
455 (bss_desc->bcn_wpa_ie) ?
456 (*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id : 0,
457 (bss_desc->bcn_rsn_ie) ?
458 (*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id : 0,
459 (priv->sec_info.wep_enabled) ? "e" : "d",
460 (priv->sec_info.wpa_enabled) ? "e" : "d",
461 (priv->sec_info.wpa2_enabled) ? "e" : "d",
462 priv->sec_info.encryption_mode, bss_desc->privacy);
466 /* Mode doesn't match */
471 * This function creates a channel list for the driver to scan, based
472 * on region/band information.
474 * This routine is used for any scan that is not provided with a
475 * specific channel list to scan.
478 mwifiex_scan_create_channel_list(struct mwifiex_private *priv,
479 const struct mwifiex_user_scan_cfg
481 struct mwifiex_chan_scan_param_set
485 enum ieee80211_band band;
486 struct ieee80211_supported_band *sband;
487 struct ieee80211_channel *ch;
488 struct mwifiex_adapter *adapter = priv->adapter;
491 for (band = 0; (band < IEEE80211_NUM_BANDS) ; band++) {
493 if (!priv->wdev->wiphy->bands[band])
496 sband = priv->wdev->wiphy->bands[band];
498 for (i = 0; (i < sband->n_channels) ; i++) {
499 ch = &sband->channels[i];
500 if (ch->flags & IEEE80211_CHAN_DISABLED)
502 scan_chan_list[chan_idx].radio_type = band;
505 user_scan_in->chan_list[0].scan_time)
506 scan_chan_list[chan_idx].max_scan_time =
507 cpu_to_le16((u16) user_scan_in->
508 chan_list[0].scan_time);
509 else if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
510 scan_chan_list[chan_idx].max_scan_time =
511 cpu_to_le16(adapter->passive_scan_time);
513 scan_chan_list[chan_idx].max_scan_time =
514 cpu_to_le16(adapter->active_scan_time);
516 if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
517 scan_chan_list[chan_idx].chan_scan_mode_bitmap
518 |= MWIFIEX_PASSIVE_SCAN;
520 scan_chan_list[chan_idx].chan_scan_mode_bitmap
521 &= ~MWIFIEX_PASSIVE_SCAN;
522 scan_chan_list[chan_idx].chan_number =
525 scan_chan_list[chan_idx].max_scan_time =
526 cpu_to_le16(adapter->specific_scan_time);
527 scan_chan_list[chan_idx].chan_scan_mode_bitmap
528 |= MWIFIEX_DISABLE_CHAN_FILT;
538 * This function constructs and sends multiple scan config commands to
541 * Previous routines in the code flow have created a scan command configuration
542 * with any requested TLVs. This function splits the channel TLV into maximum
543 * channels supported per scan lists and sends the portion of the channel TLV,
544 * along with the other TLVs, to the firmware.
547 mwifiex_scan_channel_list(struct mwifiex_private *priv,
548 u32 max_chan_per_scan, u8 filtered_scan,
549 struct mwifiex_scan_cmd_config *scan_cfg_out,
550 struct mwifiex_ie_types_chan_list_param_set
552 struct mwifiex_chan_scan_param_set *scan_chan_list)
555 struct mwifiex_chan_scan_param_set *tmp_chan_list;
556 struct mwifiex_chan_scan_param_set *start_chan;
561 if (!scan_cfg_out || !chan_tlv_out || !scan_chan_list) {
562 dev_dbg(priv->adapter->dev,
563 "info: Scan: Null detect: %p, %p, %p\n",
564 scan_cfg_out, chan_tlv_out, scan_chan_list);
568 chan_tlv_out->header.type = cpu_to_le16(TLV_TYPE_CHANLIST);
570 /* Set the temp channel struct pointer to the start of the desired
572 tmp_chan_list = scan_chan_list;
574 /* Loop through the desired channel list, sending a new firmware scan
575 commands for each max_chan_per_scan channels (or for 1,6,11
576 individually if configured accordingly) */
577 while (tmp_chan_list->chan_number) {
581 chan_tlv_out->header.len = 0;
582 start_chan = tmp_chan_list;
585 * Construct the Channel TLV for the scan command. Continue to
586 * insert channel TLVs until:
587 * - the tlv_idx hits the maximum configured per scan command
588 * - the next channel to insert is 0 (end of desired channel
590 * - done_early is set (controlling individual scanning of
593 if (tlv_idx < max_chan_per_scan) {
594 dev_dbg(priv->adapter->dev,
595 "info: Scan: Chan(%3d), Radio(%d),"
596 " Mode(%d, %d), Dur(%d)\n",
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));
605 /* Copy the current channel TLV to the command being
607 memcpy(chan_tlv_out->chan_scan_param + tlv_idx,
609 sizeof(chan_tlv_out->chan_scan_param));
611 /* Increment the TLV header length by the size
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)));
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.
623 scan_cfg_out->tlv_buf_len = (u32) ((u8 *) chan_tlv_out -
624 scan_cfg_out->tlv_buf);
626 /* Add the size of the channel tlv header and the data
628 scan_cfg_out->tlv_buf_len +=
629 (sizeof(chan_tlv_out->header)
630 + le16_to_cpu(chan_tlv_out->header.len));
632 /* Increment the index to the channel tlv we are
636 /* Count the total scan time per command */
638 le16_to_cpu(tmp_chan_list->max_scan_time);
640 /* Increment the tmp pointer to the next channel to
645 /* The total scan time should be less than scan command timeout
647 if (total_scan_time > MWIFIEX_MAX_TOTAL_SCAN_TIME) {
648 dev_err(priv->adapter->dev, "total scan time %dms"
649 " is over limit (%dms), scan skipped\n",
650 total_scan_time, MWIFIEX_MAX_TOTAL_SCAN_TIME);
655 priv->adapter->scan_channels = start_chan;
657 /* Send the scan command to the firmware with the specified
659 ret = mwifiex_send_cmd_async(priv, HostCmd_CMD_802_11_SCAN,
660 HostCmd_ACT_GEN_SET, 0,
673 * This function constructs a scan command configuration structure to use
676 * Application layer or other functions can invoke network scanning
677 * with a scan configuration supplied in a user scan configuration structure.
678 * This structure is used as the basis of one or many scan command configuration
679 * commands that are sent to the command processing module and eventually to the
682 * This function creates a scan command configuration structure based on the
683 * following user supplied parameters (if present):
686 * - Number of Probes to be sent
689 * If the SSID or BSSID filter is not present, the filter is disabled/cleared.
690 * If the number of probes is not set, adapter default setting is used.
693 mwifiex_config_scan(struct mwifiex_private *priv,
694 const struct mwifiex_user_scan_cfg *user_scan_in,
695 struct mwifiex_scan_cmd_config *scan_cfg_out,
696 struct mwifiex_ie_types_chan_list_param_set **chan_list_out,
697 struct mwifiex_chan_scan_param_set *scan_chan_list,
698 u8 *max_chan_per_scan, u8 *filtered_scan,
699 u8 *scan_current_only)
701 struct mwifiex_adapter *adapter = priv->adapter;
702 struct mwifiex_ie_types_num_probes *num_probes_tlv;
703 struct mwifiex_ie_types_wildcard_ssid_params *wildcard_ssid_tlv;
704 struct mwifiex_ie_types_rates_param_set *rates_tlv;
705 const u8 zero_mac[ETH_ALEN] = { 0, 0, 0, 0, 0, 0 };
717 u8 rates[MWIFIEX_SUPPORTED_RATES];
719 struct mwifiex_ie_types_htcap *ht_cap;
721 /* The tlv_buf_len is calculated for each scan command. The TLVs added
722 in this routine will be preserved since the routine that sends the
723 command will append channelTLVs at *chan_list_out. The difference
724 between the *chan_list_out and the tlv_buf start will be used to
725 calculate the size of anything we add in this routine. */
726 scan_cfg_out->tlv_buf_len = 0;
728 /* Running tlv pointer. Assigned to chan_list_out at end of function
729 so later routines know where channels can be added to the command
731 tlv_pos = scan_cfg_out->tlv_buf;
733 /* Initialize the scan as un-filtered; the flag is later set to TRUE
734 below if a SSID or BSSID filter is sent in the command */
735 *filtered_scan = false;
737 /* Initialize the scan as not being only on the current channel. If
738 the channel list is customized, only contains one channel, and is
739 the active channel, this is set true and data flow is not halted. */
740 *scan_current_only = false;
744 /* Default the ssid_filter flag to TRUE, set false under
745 certain wildcard conditions and qualified by the existence
746 of an SSID list before marking the scan as filtered */
749 /* Set the BSS type scan filter, use Adapter setting if
751 scan_cfg_out->bss_mode =
752 (user_scan_in->bss_mode ? (u8) user_scan_in->
753 bss_mode : (u8) adapter->scan_mode);
755 /* Set the number of probes to send, use Adapter setting
758 (user_scan_in->num_probes ? user_scan_in->
759 num_probes : adapter->scan_probes);
762 * Set the BSSID filter to the incoming configuration,
763 * if non-zero. If not set, it will remain disabled
766 memcpy(scan_cfg_out->specific_bssid,
767 user_scan_in->specific_bssid,
768 sizeof(scan_cfg_out->specific_bssid));
770 for (i = 0; i < user_scan_in->num_ssids; i++) {
771 ssid_len = user_scan_in->ssid_list[i].ssid_len;
774 (struct mwifiex_ie_types_wildcard_ssid_params *)
776 wildcard_ssid_tlv->header.type =
777 cpu_to_le16(TLV_TYPE_WILDCARDSSID);
778 wildcard_ssid_tlv->header.len = cpu_to_le16(
779 (u16) (ssid_len + sizeof(wildcard_ssid_tlv->
783 * max_ssid_length = 0 tells firmware to perform
784 * specific scan for the SSID filled, whereas
785 * max_ssid_length = IEEE80211_MAX_SSID_LEN is for
789 wildcard_ssid_tlv->max_ssid_length = 0;
791 wildcard_ssid_tlv->max_ssid_length =
792 IEEE80211_MAX_SSID_LEN;
794 memcpy(wildcard_ssid_tlv->ssid,
795 user_scan_in->ssid_list[i].ssid, ssid_len);
797 tlv_pos += (sizeof(wildcard_ssid_tlv->header)
798 + le16_to_cpu(wildcard_ssid_tlv->header.len));
800 dev_dbg(adapter->dev, "info: scan: ssid[%d]: %s, %d\n",
801 i, wildcard_ssid_tlv->ssid,
802 wildcard_ssid_tlv->max_ssid_length);
804 /* Empty wildcard ssid with a maxlen will match many or
805 potentially all SSIDs (maxlen == 32), therefore do
806 not treat the scan as
808 if (!ssid_len && wildcard_ssid_tlv->max_ssid_length)
813 * The default number of channels sent in the command is low to
814 * ensure the response buffer from the firmware does not
815 * truncate scan results. That is not an issue with an SSID
816 * or BSSID filter applied to the scan results in the firmware.
818 if ((i && ssid_filter) ||
819 memcmp(scan_cfg_out->specific_bssid, &zero_mac,
821 *filtered_scan = true;
823 scan_cfg_out->bss_mode = (u8) adapter->scan_mode;
824 num_probes = adapter->scan_probes;
828 * If a specific BSSID or SSID is used, the number of channels in the
829 * scan command will be increased to the absolute maximum.
832 *max_chan_per_scan = MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN;
834 *max_chan_per_scan = MWIFIEX_DEF_CHANNELS_PER_SCAN_CMD;
836 /* If the input config or adapter has the number of Probes set,
840 dev_dbg(adapter->dev, "info: scan: num_probes = %d\n",
843 num_probes_tlv = (struct mwifiex_ie_types_num_probes *) tlv_pos;
844 num_probes_tlv->header.type = cpu_to_le16(TLV_TYPE_NUMPROBES);
845 num_probes_tlv->header.len =
846 cpu_to_le16(sizeof(num_probes_tlv->num_probes));
847 num_probes_tlv->num_probes = cpu_to_le16((u16) num_probes);
849 tlv_pos += sizeof(num_probes_tlv->header) +
850 le16_to_cpu(num_probes_tlv->header.len);
854 /* Append rates tlv */
855 memset(rates, 0, sizeof(rates));
857 rates_size = mwifiex_get_supported_rates(priv, rates);
859 rates_tlv = (struct mwifiex_ie_types_rates_param_set *) tlv_pos;
860 rates_tlv->header.type = cpu_to_le16(WLAN_EID_SUPP_RATES);
861 rates_tlv->header.len = cpu_to_le16((u16) rates_size);
862 memcpy(rates_tlv->rates, rates, rates_size);
863 tlv_pos += sizeof(rates_tlv->header) + rates_size;
865 dev_dbg(adapter->dev, "info: SCAN_CMD: Rates size = %d\n", rates_size);
867 if (ISSUPP_11NENABLED(priv->adapter->fw_cap_info) &&
868 (priv->adapter->config_bands & BAND_GN ||
869 priv->adapter->config_bands & BAND_AN)) {
870 ht_cap = (struct mwifiex_ie_types_htcap *) tlv_pos;
871 memset(ht_cap, 0, sizeof(struct mwifiex_ie_types_htcap));
872 ht_cap->header.type = cpu_to_le16(WLAN_EID_HT_CAPABILITY);
874 cpu_to_le16(sizeof(struct ieee80211_ht_cap));
876 mwifiex_band_to_radio_type(priv->adapter->config_bands);
877 mwifiex_fill_cap_info(priv, radio_type, ht_cap);
878 tlv_pos += sizeof(struct mwifiex_ie_types_htcap);
881 /* Append vendor specific IE TLV */
882 mwifiex_cmd_append_vsie_tlv(priv, MWIFIEX_VSIE_MASK_SCAN, &tlv_pos);
885 * Set the output for the channel TLV to the address in the tlv buffer
886 * past any TLVs that were added in this function (SSID, num_probes).
887 * Channel TLVs will be added past this for each scan command,
888 * preserving the TLVs that were previously added.
891 (struct mwifiex_ie_types_chan_list_param_set *) tlv_pos;
893 if (user_scan_in && user_scan_in->chan_list[0].chan_number) {
895 dev_dbg(adapter->dev, "info: Scan: Using supplied channel list\n");
898 chan_idx < MWIFIEX_USER_SCAN_CHAN_MAX &&
899 user_scan_in->chan_list[chan_idx].chan_number;
902 channel = user_scan_in->chan_list[chan_idx].chan_number;
903 (scan_chan_list + chan_idx)->chan_number = channel;
906 user_scan_in->chan_list[chan_idx].radio_type;
907 (scan_chan_list + chan_idx)->radio_type = radio_type;
909 scan_type = user_scan_in->chan_list[chan_idx].scan_type;
911 if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE)
913 chan_idx)->chan_scan_mode_bitmap
914 |= MWIFIEX_PASSIVE_SCAN;
917 chan_idx)->chan_scan_mode_bitmap
918 &= ~MWIFIEX_PASSIVE_SCAN;
920 if (user_scan_in->chan_list[chan_idx].scan_time) {
921 scan_dur = (u16) user_scan_in->
922 chan_list[chan_idx].scan_time;
924 if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE)
925 scan_dur = adapter->passive_scan_time;
926 else if (*filtered_scan)
927 scan_dur = adapter->specific_scan_time;
929 scan_dur = adapter->active_scan_time;
932 (scan_chan_list + chan_idx)->min_scan_time =
933 cpu_to_le16(scan_dur);
934 (scan_chan_list + chan_idx)->max_scan_time =
935 cpu_to_le16(scan_dur);
938 /* Check if we are only scanning the current channel */
939 if ((chan_idx == 1) &&
940 (user_scan_in->chan_list[0].chan_number ==
941 priv->curr_bss_params.bss_descriptor.channel)) {
942 *scan_current_only = true;
943 dev_dbg(adapter->dev,
944 "info: Scan: Scanning current channel only\n");
948 dev_dbg(adapter->dev,
949 "info: Scan: Creating full region channel list\n");
950 chan_num = mwifiex_scan_create_channel_list(priv, user_scan_in,
956 * In associated state we will reduce the number of channels scanned per
957 * scan command to avoid any traffic delay/loss. This number is decided
958 * based on total number of channels to be scanned due to constraints
959 * of command buffers.
961 if (priv->media_connected) {
962 if (chan_num < MWIFIEX_LIMIT_1_CHANNEL_PER_SCAN_CMD)
963 *max_chan_per_scan = 1;
964 else if (chan_num < MWIFIEX_LIMIT_2_CHANNELS_PER_SCAN_CMD)
965 *max_chan_per_scan = 2;
966 else if (chan_num < MWIFIEX_LIMIT_3_CHANNELS_PER_SCAN_CMD)
967 *max_chan_per_scan = 3;
969 *max_chan_per_scan = 4;
974 * This function inspects the scan response buffer for pointers to
977 * TLVs can be included at the end of the scan response BSS information.
979 * Data in the buffer is parsed pointers to TLVs that can potentially
980 * be passed back in the response.
983 mwifiex_ret_802_11_scan_get_tlv_ptrs(struct mwifiex_adapter *adapter,
984 struct mwifiex_ie_types_data *tlv,
985 u32 tlv_buf_size, u32 req_tlv_type,
986 struct mwifiex_ie_types_data **tlv_data)
988 struct mwifiex_ie_types_data *current_tlv;
994 tlv_buf_left = tlv_buf_size;
997 dev_dbg(adapter->dev, "info: SCAN_RESP: tlv_buf_size = %d\n",
1000 while (tlv_buf_left >= sizeof(struct mwifiex_ie_types_header)) {
1002 tlv_type = le16_to_cpu(current_tlv->header.type);
1003 tlv_len = le16_to_cpu(current_tlv->header.len);
1005 if (sizeof(tlv->header) + tlv_len > tlv_buf_left) {
1006 dev_err(adapter->dev, "SCAN_RESP: TLV buffer corrupt\n");
1010 if (req_tlv_type == tlv_type) {
1012 case TLV_TYPE_TSFTIMESTAMP:
1013 dev_dbg(adapter->dev, "info: SCAN_RESP: TSF "
1014 "timestamp TLV, len = %d\n", tlv_len);
1015 *tlv_data = (struct mwifiex_ie_types_data *)
1018 case TLV_TYPE_CHANNELBANDLIST:
1019 dev_dbg(adapter->dev, "info: SCAN_RESP: channel"
1020 " band list TLV, len = %d\n", tlv_len);
1021 *tlv_data = (struct mwifiex_ie_types_data *)
1025 dev_err(adapter->dev,
1026 "SCAN_RESP: unhandled TLV = %d\n",
1028 /* Give up, this seems corrupted */
1037 tlv_buf_left -= (sizeof(tlv->header) + tlv_len);
1039 (struct mwifiex_ie_types_data *) (current_tlv->data +
1046 * This function parses provided beacon buffer and updates
1047 * respective fields in bss descriptor structure.
1049 int mwifiex_update_bss_desc_with_ie(struct mwifiex_adapter *adapter,
1050 struct mwifiex_bssdescriptor *bss_entry)
1054 struct ieee_types_fh_param_set *fh_param_set;
1055 struct ieee_types_ds_param_set *ds_param_set;
1056 struct ieee_types_cf_param_set *cf_param_set;
1057 struct ieee_types_ibss_param_set *ibss_param_set;
1064 u8 found_data_rate_ie;
1066 struct ieee_types_vendor_specific *vendor_ie;
1067 const u8 wpa_oui[4] = { 0x00, 0x50, 0xf2, 0x01 };
1068 const u8 wmm_oui[4] = { 0x00, 0x50, 0xf2, 0x02 };
1070 found_data_rate_ie = false;
1072 current_ptr = bss_entry->beacon_buf;
1073 bytes_left = bss_entry->beacon_buf_size;
1075 /* Process variable IE */
1076 while (bytes_left >= 2) {
1077 element_id = *current_ptr;
1078 element_len = *(current_ptr + 1);
1079 total_ie_len = element_len + sizeof(struct ieee_types_header);
1081 if (bytes_left < total_ie_len) {
1082 dev_err(adapter->dev, "err: InterpretIE: in processing"
1083 " IE, bytes left < IE length\n");
1086 switch (element_id) {
1088 bss_entry->ssid.ssid_len = element_len;
1089 memcpy(bss_entry->ssid.ssid, (current_ptr + 2),
1091 dev_dbg(adapter->dev,
1092 "info: InterpretIE: ssid: %-32s\n",
1093 bss_entry->ssid.ssid);
1096 case WLAN_EID_SUPP_RATES:
1097 memcpy(bss_entry->data_rates, current_ptr + 2,
1099 memcpy(bss_entry->supported_rates, current_ptr + 2,
1101 rate_size = element_len;
1102 found_data_rate_ie = true;
1105 case WLAN_EID_FH_PARAMS:
1107 (struct ieee_types_fh_param_set *) current_ptr;
1108 memcpy(&bss_entry->phy_param_set.fh_param_set,
1110 sizeof(struct ieee_types_fh_param_set));
1113 case WLAN_EID_DS_PARAMS:
1115 (struct ieee_types_ds_param_set *) current_ptr;
1117 bss_entry->channel = ds_param_set->current_chan;
1119 memcpy(&bss_entry->phy_param_set.ds_param_set,
1121 sizeof(struct ieee_types_ds_param_set));
1124 case WLAN_EID_CF_PARAMS:
1126 (struct ieee_types_cf_param_set *) current_ptr;
1127 memcpy(&bss_entry->ss_param_set.cf_param_set,
1129 sizeof(struct ieee_types_cf_param_set));
1132 case WLAN_EID_IBSS_PARAMS:
1134 (struct ieee_types_ibss_param_set *)
1136 memcpy(&bss_entry->ss_param_set.ibss_param_set,
1138 sizeof(struct ieee_types_ibss_param_set));
1141 case WLAN_EID_ERP_INFO:
1142 bss_entry->erp_flags = *(current_ptr + 2);
1145 case WLAN_EID_EXT_SUPP_RATES:
1147 * Only process extended supported rate
1148 * if data rate is already found.
1149 * Data rate IE should come before
1150 * extended supported rate IE
1152 if (found_data_rate_ie) {
1153 if ((element_len + rate_size) >
1154 MWIFIEX_SUPPORTED_RATES)
1156 (MWIFIEX_SUPPORTED_RATES -
1159 bytes_to_copy = element_len;
1161 rate = (u8 *) bss_entry->data_rates;
1163 memcpy(rate, current_ptr + 2, bytes_to_copy);
1165 rate = (u8 *) bss_entry->supported_rates;
1167 memcpy(rate, current_ptr + 2, bytes_to_copy);
1171 case WLAN_EID_VENDOR_SPECIFIC:
1172 vendor_ie = (struct ieee_types_vendor_specific *)
1176 (vendor_ie->vend_hdr.oui, wpa_oui,
1178 bss_entry->bcn_wpa_ie =
1179 (struct ieee_types_vendor_specific *)
1181 bss_entry->wpa_offset = (u16)
1182 (current_ptr - bss_entry->beacon_buf);
1183 } else if (!memcmp(vendor_ie->vend_hdr.oui, wmm_oui,
1186 sizeof(struct ieee_types_wmm_parameter) ||
1188 sizeof(struct ieee_types_wmm_info))
1190 * Only accept and copy the WMM IE if
1191 * it matches the size expected for the
1192 * WMM Info IE or the WMM Parameter IE.
1194 memcpy((u8 *) &bss_entry->wmm_ie,
1195 current_ptr, total_ie_len);
1199 bss_entry->bcn_rsn_ie =
1200 (struct ieee_types_generic *) current_ptr;
1201 bss_entry->rsn_offset = (u16) (current_ptr -
1202 bss_entry->beacon_buf);
1204 case WLAN_EID_BSS_AC_ACCESS_DELAY:
1205 bss_entry->bcn_wapi_ie =
1206 (struct ieee_types_generic *) current_ptr;
1207 bss_entry->wapi_offset = (u16) (current_ptr -
1208 bss_entry->beacon_buf);
1210 case WLAN_EID_HT_CAPABILITY:
1211 bss_entry->bcn_ht_cap = (struct ieee80211_ht_cap *)
1213 sizeof(struct ieee_types_header));
1214 bss_entry->ht_cap_offset = (u16) (current_ptr +
1215 sizeof(struct ieee_types_header) -
1216 bss_entry->beacon_buf);
1218 case WLAN_EID_HT_INFORMATION:
1219 bss_entry->bcn_ht_info = (struct ieee80211_ht_info *)
1221 sizeof(struct ieee_types_header));
1222 bss_entry->ht_info_offset = (u16) (current_ptr +
1223 sizeof(struct ieee_types_header) -
1224 bss_entry->beacon_buf);
1226 case WLAN_EID_BSS_COEX_2040:
1227 bss_entry->bcn_bss_co_2040 = (u8 *) (current_ptr +
1228 sizeof(struct ieee_types_header));
1229 bss_entry->bss_co_2040_offset = (u16) (current_ptr +
1230 sizeof(struct ieee_types_header) -
1231 bss_entry->beacon_buf);
1233 case WLAN_EID_EXT_CAPABILITY:
1234 bss_entry->bcn_ext_cap = (u8 *) (current_ptr +
1235 sizeof(struct ieee_types_header));
1236 bss_entry->ext_cap_offset = (u16) (current_ptr +
1237 sizeof(struct ieee_types_header) -
1238 bss_entry->beacon_buf);
1244 current_ptr += element_len + 2;
1246 /* Need to account for IE ID and IE Len */
1247 bytes_left -= (element_len + 2);
1249 } /* while (bytes_left > 2) */
1254 * This function converts radio type scan parameter to a band configuration
1255 * to be used in join command.
1258 mwifiex_radio_type_to_band(u8 radio_type)
1260 switch (radio_type) {
1261 case HostCmd_SCAN_RADIO_TYPE_A:
1263 case HostCmd_SCAN_RADIO_TYPE_BG:
1270 * This is an internal function used to start a scan based on an input
1273 * This uses the input user scan configuration information when provided in
1274 * order to send the appropriate scan commands to firmware to populate or
1275 * update the internal driver scan table.
1277 int mwifiex_scan_networks(struct mwifiex_private *priv,
1278 const struct mwifiex_user_scan_cfg *user_scan_in)
1281 struct mwifiex_adapter *adapter = priv->adapter;
1282 struct cmd_ctrl_node *cmd_node;
1283 union mwifiex_scan_cmd_config_tlv *scan_cfg_out;
1284 struct mwifiex_ie_types_chan_list_param_set *chan_list_out;
1286 struct mwifiex_chan_scan_param_set *scan_chan_list;
1288 u8 scan_current_chan_only;
1289 u8 max_chan_per_scan;
1290 unsigned long flags;
1292 if (adapter->scan_processing) {
1293 dev_err(adapter->dev, "cmd: Scan already in process...\n");
1297 if (priv->scan_block) {
1298 dev_err(adapter->dev,
1299 "cmd: Scan is blocked during association...\n");
1303 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
1304 adapter->scan_processing = true;
1305 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
1307 scan_cfg_out = kzalloc(sizeof(union mwifiex_scan_cmd_config_tlv),
1309 if (!scan_cfg_out) {
1310 dev_err(adapter->dev, "failed to alloc scan_cfg_out\n");
1315 buf_size = sizeof(struct mwifiex_chan_scan_param_set) *
1316 MWIFIEX_USER_SCAN_CHAN_MAX;
1317 scan_chan_list = kzalloc(buf_size, GFP_KERNEL);
1318 if (!scan_chan_list) {
1319 dev_err(adapter->dev, "failed to alloc scan_chan_list\n");
1320 kfree(scan_cfg_out);
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);
1329 ret = mwifiex_scan_channel_list(priv, max_chan_per_scan, filtered_scan,
1330 &scan_cfg_out->config, chan_list_out,
1333 /* Get scan command from scan_pending_q and put to cmd_pending_q */
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,
1338 struct cmd_ctrl_node, list);
1339 list_del(&cmd_node->list);
1340 spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
1342 adapter->cmd_queued = cmd_node;
1343 mwifiex_insert_cmd_to_pending_q(adapter, cmd_node,
1345 queue_work(adapter->workqueue, &adapter->main_work);
1347 spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
1352 kfree(scan_cfg_out);
1353 kfree(scan_chan_list);
1356 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
1357 adapter->scan_processing = false;
1358 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
1364 * This function prepares a scan command to be sent to the firmware.
1366 * This uses the scan command configuration sent to the command processing
1367 * module in command preparation stage to configure a scan command structure
1368 * to send to firmware.
1370 * The fixed fields specifying the BSS type and BSSID filters as well as a
1371 * variable number/length of TLVs are sent in the command to firmware.
1373 * Preparation also includes -
1374 * - Setting command ID, and proper size
1375 * - Ensuring correct endian-ness
1377 int mwifiex_cmd_802_11_scan(struct host_cmd_ds_command *cmd,
1378 struct mwifiex_scan_cmd_config *scan_cfg)
1380 struct host_cmd_ds_802_11_scan *scan_cmd = &cmd->params.scan;
1382 /* Set fixed field variables in scan command */
1383 scan_cmd->bss_mode = scan_cfg->bss_mode;
1384 memcpy(scan_cmd->bssid, scan_cfg->specific_bssid,
1385 sizeof(scan_cmd->bssid));
1386 memcpy(scan_cmd->tlv_buffer, scan_cfg->tlv_buf, scan_cfg->tlv_buf_len);
1388 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_SCAN);
1390 /* Size is equal to the sizeof(fixed portions) + the TLV len + header */
1391 cmd->size = cpu_to_le16((u16) (sizeof(scan_cmd->bss_mode)
1392 + sizeof(scan_cmd->bssid)
1393 + scan_cfg->tlv_buf_len + S_DS_GEN));
1399 * This function checks compatibility of requested network with current
1402 int mwifiex_check_network_compatibility(struct mwifiex_private *priv,
1403 struct mwifiex_bssdescriptor *bss_desc)
1410 if ((mwifiex_get_cfp(priv, (u8) bss_desc->bss_band,
1411 (u16) bss_desc->channel, 0))) {
1412 switch (priv->bss_mode) {
1413 case NL80211_IFTYPE_STATION:
1414 case NL80211_IFTYPE_ADHOC:
1415 ret = mwifiex_is_network_compatible(priv, bss_desc,
1418 dev_err(priv->adapter->dev,
1419 "Incompatible network settings\n");
1429 static int mwifiex_update_curr_bss_params(struct mwifiex_private *priv,
1430 struct cfg80211_bss *bss)
1432 struct mwifiex_bssdescriptor *bss_desc;
1434 unsigned long flags;
1436 size_t beacon_ie_len = bss->len_information_elements;
1438 /* Allocate and fill new bss descriptor */
1439 bss_desc = kzalloc(sizeof(struct mwifiex_bssdescriptor),
1442 dev_err(priv->adapter->dev, " failed to alloc bss_desc\n");
1446 beacon_ie = kmemdup(bss->information_elements, beacon_ie_len,
1453 ret = mwifiex_fill_new_bss_desc(priv, bss, bss_desc, beacon_ie,
1458 ret = mwifiex_check_network_compatibility(priv, bss_desc);
1462 spin_lock_irqsave(&priv->curr_bcn_buf_lock, flags);
1463 /* Make a copy of current BSSID descriptor */
1464 memcpy(&priv->curr_bss_params.bss_descriptor, bss_desc,
1465 sizeof(priv->curr_bss_params.bss_descriptor));
1467 /* The contents of beacon_ie will be copied to its own buffer
1468 * in mwifiex_save_curr_bcn()
1470 mwifiex_save_curr_bcn(priv);
1471 spin_unlock_irqrestore(&priv->curr_bcn_buf_lock, flags);
1480 * This function handles the command response of scan.
1482 * The response buffer for the scan command has the following
1485 * .-------------------------------------------------------------.
1486 * | Header (4 * sizeof(t_u16)): Standard command response hdr |
1487 * .-------------------------------------------------------------.
1488 * | BufSize (t_u16) : sizeof the BSS Description data |
1489 * .-------------------------------------------------------------.
1490 * | NumOfSet (t_u8) : Number of BSS Descs returned |
1491 * .-------------------------------------------------------------.
1492 * | BSSDescription data (variable, size given in BufSize) |
1493 * .-------------------------------------------------------------.
1494 * | TLV data (variable, size calculated using Header->Size, |
1495 * | BufSize and sizeof the fixed fields above) |
1496 * .-------------------------------------------------------------.
1498 int mwifiex_ret_802_11_scan(struct mwifiex_private *priv,
1499 struct host_cmd_ds_command *resp)
1502 struct mwifiex_adapter *adapter = priv->adapter;
1503 struct cmd_ctrl_node *cmd_node;
1504 struct host_cmd_ds_802_11_scan_rsp *scan_rsp;
1505 struct mwifiex_ie_types_data *tlv_data;
1506 struct mwifiex_ie_types_tsf_timestamp *tsf_tlv;
1512 struct mwifiex_chan_freq_power *cfp;
1513 struct mwifiex_ie_types_chan_band_list_param_set *chan_band_tlv;
1514 struct chan_band_param_set *chan_band;
1516 unsigned long flags;
1517 struct cfg80211_bss *bss;
1519 is_bgscan_resp = (le16_to_cpu(resp->command)
1520 == HostCmd_CMD_802_11_BG_SCAN_QUERY);
1522 scan_rsp = &resp->params.bg_scan_query_resp.scan_resp;
1524 scan_rsp = &resp->params.scan_resp;
1527 if (scan_rsp->number_of_sets > MWIFIEX_MAX_AP) {
1528 dev_err(adapter->dev, "SCAN_RESP: too many AP returned (%d)\n",
1529 scan_rsp->number_of_sets);
1531 goto check_next_scan;
1534 bytes_left = le16_to_cpu(scan_rsp->bss_descript_size);
1535 dev_dbg(adapter->dev, "info: SCAN_RESP: bss_descript_size %d\n",
1538 scan_resp_size = le16_to_cpu(resp->size);
1540 dev_dbg(adapter->dev,
1541 "info: SCAN_RESP: returned %d APs before parsing\n",
1542 scan_rsp->number_of_sets);
1544 bss_info = scan_rsp->bss_desc_and_tlv_buffer;
1547 * The size of the TLV buffer is equal to the entire command response
1548 * size (scan_resp_size) minus the fixed fields (sizeof()'s), the
1549 * BSS Descriptions (bss_descript_size as bytesLef) and the command
1550 * response header (S_DS_GEN)
1552 tlv_buf_size = scan_resp_size - (bytes_left
1553 + sizeof(scan_rsp->bss_descript_size)
1554 + sizeof(scan_rsp->number_of_sets)
1557 tlv_data = (struct mwifiex_ie_types_data *) (scan_rsp->
1558 bss_desc_and_tlv_buffer +
1561 /* Search the TLV buffer space in the scan response for any valid
1563 mwifiex_ret_802_11_scan_get_tlv_ptrs(adapter, tlv_data, tlv_buf_size,
1564 TLV_TYPE_TSFTIMESTAMP,
1565 (struct mwifiex_ie_types_data **)
1568 /* Search the TLV buffer space in the scan response for any valid
1570 mwifiex_ret_802_11_scan_get_tlv_ptrs(adapter, tlv_data, tlv_buf_size,
1571 TLV_TYPE_CHANNELBANDLIST,
1572 (struct mwifiex_ie_types_data **)
1575 for (idx = 0; idx < scan_rsp->number_of_sets && bytes_left; idx++) {
1582 u16 beacon_size = 0;
1586 u16 cap_info_bitmap;
1589 struct mwifiex_bcn_param *bcn_param;
1590 struct mwifiex_bss_priv *bss_priv;
1592 if (bytes_left >= sizeof(beacon_size)) {
1593 /* Extract & convert beacon size from command buffer */
1594 memcpy(&beacon_size, bss_info, sizeof(beacon_size));
1595 bytes_left -= sizeof(beacon_size);
1596 bss_info += sizeof(beacon_size);
1599 if (!beacon_size || beacon_size > bytes_left) {
1600 bss_info += bytes_left;
1603 goto check_next_scan;
1606 /* Initialize the current working beacon pointer for this BSS
1608 current_ptr = bss_info;
1610 /* Advance the return beacon pointer past the current beacon */
1611 bss_info += beacon_size;
1612 bytes_left -= beacon_size;
1614 curr_bcn_bytes = beacon_size;
1617 * First 5 fields are bssid, RSSI, time stamp, beacon interval,
1618 * and capability information
1620 if (curr_bcn_bytes < sizeof(struct mwifiex_bcn_param)) {
1621 dev_err(adapter->dev,
1622 "InterpretIE: not enough bytes left\n");
1625 bcn_param = (struct mwifiex_bcn_param *)current_ptr;
1626 current_ptr += sizeof(*bcn_param);
1627 curr_bcn_bytes -= sizeof(*bcn_param);
1629 memcpy(bssid, bcn_param->bssid, ETH_ALEN);
1631 rssi = (s32) bcn_param->rssi;
1632 rssi = (-rssi) * 100; /* Convert dBm to mBm */
1633 dev_dbg(adapter->dev, "info: InterpretIE: RSSI=%d\n", rssi);
1635 timestamp = le64_to_cpu(bcn_param->timestamp);
1636 beacon_period = le16_to_cpu(bcn_param->beacon_period);
1638 cap_info_bitmap = le16_to_cpu(bcn_param->cap_info_bitmap);
1639 dev_dbg(adapter->dev, "info: InterpretIE: capabilities=0x%X\n",
1642 /* Rest of the current buffer are IE's */
1643 ie_buf = current_ptr;
1644 ie_len = curr_bcn_bytes;
1645 dev_dbg(adapter->dev,
1646 "info: InterpretIE: IELength for this AP = %d\n",
1649 while (curr_bcn_bytes >= sizeof(struct ieee_types_header)) {
1650 u8 element_id, element_len;
1652 element_id = *current_ptr;
1653 element_len = *(current_ptr + 1);
1654 if (curr_bcn_bytes < element_len +
1655 sizeof(struct ieee_types_header)) {
1656 dev_err(priv->adapter->dev,
1657 "%s: bytes left < IE length\n",
1659 goto check_next_scan;
1661 if (element_id == WLAN_EID_DS_PARAMS) {
1662 channel = *(u8 *) (current_ptr +
1663 sizeof(struct ieee_types_header));
1667 current_ptr += element_len +
1668 sizeof(struct ieee_types_header);
1669 curr_bcn_bytes -= element_len +
1670 sizeof(struct ieee_types_header);
1674 * If the TSF TLV was appended to the scan results, save this
1675 * entry's TSF value in the fw_tsf field. It is the firmware's
1676 * TSF value at the time the beacon or probe response was
1680 memcpy(&fw_tsf, &tsf_tlv->tsf_data[idx * TSF_DATA_SIZE],
1684 struct ieee80211_channel *chan;
1688 if (chan_band_tlv) {
1690 &chan_band_tlv->chan_band_param[idx];
1691 band = mwifiex_radio_type_to_band(
1692 chan_band->radio_type
1693 & (BIT(0) | BIT(1)));
1696 cfp = mwifiex_get_cfp(priv, band, channel, 0);
1698 freq = cfp ? cfp->freq : 0;
1700 chan = ieee80211_get_channel(priv->wdev->wiphy, freq);
1702 if (chan && !(chan->flags & IEEE80211_CHAN_DISABLED)) {
1703 DECLARE_SSID_BUF(ssid_buf);
1705 wiphy_info(priv->wdev->wiphy,
1706 "inform bss: %pM [SSID=%s]\n", bssid,
1707 print_ssid(ssid_buf, ie_buf + 2,
1710 bss = cfg80211_inform_bss(priv->wdev->wiphy,
1711 chan, bssid, timestamp,
1712 cap_info_bitmap, beacon_period,
1713 ie_buf, ie_len, rssi, GFP_KERNEL);
1714 bss_priv = (struct mwifiex_bss_priv *)bss->priv;
1715 bss_priv->band = band;
1716 bss_priv->fw_tsf = fw_tsf;
1717 if (priv->media_connected &&
1719 priv->curr_bss_params.bss_descriptor
1720 .mac_address, ETH_ALEN))
1721 mwifiex_update_curr_bss_params(priv,
1723 cfg80211_put_bss(bss);
1726 dev_dbg(adapter->dev, "missing BSS channel IE\n");
1731 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
1732 if (list_empty(&adapter->scan_pending_q)) {
1733 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
1734 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
1735 adapter->scan_processing = false;
1736 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
1738 /* Need to indicate IOCTL complete */
1739 if (adapter->curr_cmd->wait_q_enabled) {
1740 adapter->cmd_wait_q.status = 0;
1741 mwifiex_complete_cmd(adapter, adapter->curr_cmd);
1743 if (priv->report_scan_result)
1744 priv->report_scan_result = false;
1746 if (priv->user_scan_cfg) {
1747 if (priv->scan_request) {
1748 dev_dbg(priv->adapter->dev,
1749 "info: notifying scan done\n");
1750 cfg80211_scan_done(priv->scan_request, 0);
1751 priv->scan_request = NULL;
1753 dev_dbg(priv->adapter->dev,
1754 "info: scan already aborted\n");
1757 kfree(priv->user_scan_cfg);
1758 priv->user_scan_cfg = NULL;
1761 if (priv->user_scan_cfg && !priv->scan_request) {
1762 spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
1764 adapter->scan_delay_cnt = MWIFIEX_MAX_SCAN_DELAY_CNT;
1765 mod_timer(&priv->scan_delay_timer, jiffies);
1766 dev_dbg(priv->adapter->dev,
1767 "info: %s: triggerring scan abort\n", __func__);
1768 } else if (!mwifiex_wmm_lists_empty(adapter) &&
1769 (priv->scan_request && (priv->scan_request->flags &
1770 CFG80211_SCAN_FLAG_TX_ABORT))) {
1771 spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
1773 adapter->scan_delay_cnt = 1;
1774 mod_timer(&priv->scan_delay_timer, jiffies +
1775 msecs_to_jiffies(MWIFIEX_SCAN_DELAY_MSEC));
1776 dev_dbg(priv->adapter->dev,
1777 "info: %s: deferring scan\n", __func__);
1779 /* Get scan command from scan_pending_q and put to
1781 cmd_node = list_first_entry(&adapter->scan_pending_q,
1782 struct cmd_ctrl_node, list);
1783 list_del(&cmd_node->list);
1784 spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
1786 mwifiex_insert_cmd_to_pending_q(adapter, cmd_node,
1795 * This function prepares command for background scan query.
1797 * Preparation includes -
1798 * - Setting command ID and proper size
1799 * - Setting background scan flush parameter
1800 * - Ensuring correct endian-ness
1802 int mwifiex_cmd_802_11_bg_scan_query(struct host_cmd_ds_command *cmd)
1804 struct host_cmd_ds_802_11_bg_scan_query *bg_query =
1805 &cmd->params.bg_scan_query;
1807 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_BG_SCAN_QUERY);
1808 cmd->size = cpu_to_le16(sizeof(struct host_cmd_ds_802_11_bg_scan_query)
1811 bg_query->flush = 1;
1817 * This function inserts scan command node to the scan pending queue.
1820 mwifiex_queue_scan_cmd(struct mwifiex_private *priv,
1821 struct cmd_ctrl_node *cmd_node)
1823 struct mwifiex_adapter *adapter = priv->adapter;
1824 unsigned long flags;
1826 cmd_node->wait_q_enabled = true;
1827 cmd_node->condition = &adapter->scan_wait_q_woken;
1828 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
1829 list_add_tail(&cmd_node->list, &adapter->scan_pending_q);
1830 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
1834 * This function sends a scan command for all available channels to the
1835 * firmware, filtered on a specific SSID.
1837 static int mwifiex_scan_specific_ssid(struct mwifiex_private *priv,
1838 struct cfg80211_ssid *req_ssid)
1840 struct mwifiex_adapter *adapter = priv->adapter;
1842 struct mwifiex_user_scan_cfg *scan_cfg;
1844 if (adapter->scan_processing) {
1845 dev_err(adapter->dev, "cmd: Scan already in process...\n");
1849 if (priv->scan_block) {
1850 dev_err(adapter->dev,
1851 "cmd: Scan is blocked during association...\n");
1855 scan_cfg = kzalloc(sizeof(struct mwifiex_user_scan_cfg), GFP_KERNEL);
1857 dev_err(adapter->dev, "failed to alloc scan_cfg\n");
1861 scan_cfg->ssid_list = req_ssid;
1862 scan_cfg->num_ssids = 1;
1864 ret = mwifiex_scan_networks(priv, scan_cfg);
1871 * Sends IOCTL request to start a scan.
1873 * This function allocates the IOCTL request buffer, fills it
1874 * with requisite parameters and calls the IOCTL handler.
1876 * Scan command can be issued for both normal scan and specific SSID
1877 * scan, depending upon whether an SSID is provided or not.
1879 int mwifiex_request_scan(struct mwifiex_private *priv,
1880 struct cfg80211_ssid *req_ssid)
1884 if (down_interruptible(&priv->async_sem)) {
1885 dev_err(priv->adapter->dev, "%s: acquire semaphore\n",
1890 priv->adapter->scan_wait_q_woken = false;
1892 if (req_ssid && req_ssid->ssid_len != 0)
1893 /* Specific SSID scan */
1894 ret = mwifiex_scan_specific_ssid(priv, req_ssid);
1897 ret = mwifiex_scan_networks(priv, NULL);
1900 ret = mwifiex_wait_queue_complete(priv->adapter);
1902 up(&priv->async_sem);
1908 * This function appends the vendor specific IE TLV to a buffer.
1911 mwifiex_cmd_append_vsie_tlv(struct mwifiex_private *priv,
1912 u16 vsie_mask, u8 **buffer)
1914 int id, ret_len = 0;
1915 struct mwifiex_ie_types_vendor_param_set *vs_param_set;
1923 * Traverse through the saved vendor specific IE array and append
1924 * the selected(scan/assoc/adhoc) IE as TLV to the command
1926 for (id = 0; id < MWIFIEX_MAX_VSIE_NUM; id++) {
1927 if (priv->vs_ie[id].mask & vsie_mask) {
1929 (struct mwifiex_ie_types_vendor_param_set *)
1931 vs_param_set->header.type =
1932 cpu_to_le16(TLV_TYPE_PASSTHROUGH);
1933 vs_param_set->header.len =
1934 cpu_to_le16((((u16) priv->vs_ie[id].ie[1])
1936 memcpy(vs_param_set->ie, priv->vs_ie[id].ie,
1937 le16_to_cpu(vs_param_set->header.len));
1938 *buffer += le16_to_cpu(vs_param_set->header.len) +
1939 sizeof(struct mwifiex_ie_types_header);
1940 ret_len += le16_to_cpu(vs_param_set->header.len) +
1941 sizeof(struct mwifiex_ie_types_header);
1948 * This function saves a beacon buffer of the current BSS descriptor.
1950 * The current beacon buffer is saved so that it can be restored in the
1951 * following cases that makes the beacon buffer not to contain the current
1952 * ssid's beacon buffer.
1953 * - The current ssid was not found somehow in the last scan.
1954 * - The current ssid was the last entry of the scan table and overloaded.
1957 mwifiex_save_curr_bcn(struct mwifiex_private *priv)
1959 struct mwifiex_bssdescriptor *curr_bss =
1960 &priv->curr_bss_params.bss_descriptor;
1962 if (!curr_bss->beacon_buf_size)
1965 /* allocate beacon buffer at 1st time; or if it's size has changed */
1966 if (!priv->curr_bcn_buf ||
1967 priv->curr_bcn_size != curr_bss->beacon_buf_size) {
1968 priv->curr_bcn_size = curr_bss->beacon_buf_size;
1970 kfree(priv->curr_bcn_buf);
1971 priv->curr_bcn_buf = kmalloc(curr_bss->beacon_buf_size,
1973 if (!priv->curr_bcn_buf) {
1974 dev_err(priv->adapter->dev,
1975 "failed to alloc curr_bcn_buf\n");
1980 memcpy(priv->curr_bcn_buf, curr_bss->beacon_buf,
1981 curr_bss->beacon_buf_size);
1982 dev_dbg(priv->adapter->dev, "info: current beacon saved %d\n",
1983 priv->curr_bcn_size);
1985 curr_bss->beacon_buf = priv->curr_bcn_buf;
1987 /* adjust the pointers in the current BSS descriptor */
1988 if (curr_bss->bcn_wpa_ie)
1989 curr_bss->bcn_wpa_ie =
1990 (struct ieee_types_vendor_specific *)
1991 (curr_bss->beacon_buf +
1992 curr_bss->wpa_offset);
1994 if (curr_bss->bcn_rsn_ie)
1995 curr_bss->bcn_rsn_ie = (struct ieee_types_generic *)
1996 (curr_bss->beacon_buf +
1997 curr_bss->rsn_offset);
1999 if (curr_bss->bcn_ht_cap)
2000 curr_bss->bcn_ht_cap = (struct ieee80211_ht_cap *)
2001 (curr_bss->beacon_buf +
2002 curr_bss->ht_cap_offset);
2004 if (curr_bss->bcn_ht_info)
2005 curr_bss->bcn_ht_info = (struct ieee80211_ht_info *)
2006 (curr_bss->beacon_buf +
2007 curr_bss->ht_info_offset);
2009 if (curr_bss->bcn_bss_co_2040)
2010 curr_bss->bcn_bss_co_2040 =
2011 (u8 *) (curr_bss->beacon_buf +
2012 curr_bss->bss_co_2040_offset);
2014 if (curr_bss->bcn_ext_cap)
2015 curr_bss->bcn_ext_cap = (u8 *) (curr_bss->beacon_buf +
2016 curr_bss->ext_cap_offset);
2020 * This function frees the current BSS descriptor beacon buffer.
2023 mwifiex_free_curr_bcn(struct mwifiex_private *priv)
2025 kfree(priv->curr_bcn_buf);
2026 priv->curr_bcn_buf = NULL;