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;
562 if (!scan_cfg_out || !chan_tlv_out || !scan_chan_list) {
563 dev_dbg(priv->adapter->dev,
564 "info: Scan: Null detect: %p, %p, %p\n",
565 scan_cfg_out, chan_tlv_out, scan_chan_list);
569 chan_tlv_out->header.type = cpu_to_le16(TLV_TYPE_CHANLIST);
571 /* Set the temp channel struct pointer to the start of the desired
573 tmp_chan_list = scan_chan_list;
575 /* Loop through the desired channel list, sending a new firmware scan
576 commands for each max_chan_per_scan channels (or for 1,6,11
577 individually if configured accordingly) */
578 while (tmp_chan_list->chan_number) {
582 chan_tlv_out->header.len = 0;
583 start_chan = tmp_chan_list;
587 * Construct the Channel TLV for the scan command. Continue to
588 * insert channel TLVs until:
589 * - the tlv_idx hits the maximum configured per scan command
590 * - the next channel to insert is 0 (end of desired channel
592 * - done_early is set (controlling individual scanning of
595 while (tlv_idx < max_chan_per_scan &&
596 tmp_chan_list->chan_number && !done_early) {
598 dev_dbg(priv->adapter->dev,
599 "info: Scan: Chan(%3d), Radio(%d),"
600 " Mode(%d, %d), Dur(%d)\n",
601 tmp_chan_list->chan_number,
602 tmp_chan_list->radio_type,
603 tmp_chan_list->chan_scan_mode_bitmap
604 & MWIFIEX_PASSIVE_SCAN,
605 (tmp_chan_list->chan_scan_mode_bitmap
606 & MWIFIEX_DISABLE_CHAN_FILT) >> 1,
607 le16_to_cpu(tmp_chan_list->max_scan_time));
609 /* Copy the current channel TLV to the command being
611 memcpy(chan_tlv_out->chan_scan_param + tlv_idx,
613 sizeof(chan_tlv_out->chan_scan_param));
615 /* Increment the TLV header length by the size
617 chan_tlv_out->header.len =
618 cpu_to_le16(le16_to_cpu(chan_tlv_out->header.len) +
619 (sizeof(chan_tlv_out->chan_scan_param)));
622 * The tlv buffer length is set to the number of bytes
623 * of the between the channel tlv pointer and the start
624 * of the tlv buffer. This compensates for any TLVs
625 * that were appended before the channel list.
627 scan_cfg_out->tlv_buf_len = (u32) ((u8 *) chan_tlv_out -
628 scan_cfg_out->tlv_buf);
630 /* Add the size of the channel tlv header and the data
632 scan_cfg_out->tlv_buf_len +=
633 (sizeof(chan_tlv_out->header)
634 + le16_to_cpu(chan_tlv_out->header.len));
636 /* Increment the index to the channel tlv we are
640 /* Count the total scan time per command */
642 le16_to_cpu(tmp_chan_list->max_scan_time);
646 /* Stop the loop if the *current* channel is in the
647 1,6,11 set and we are not filtering on a BSSID
649 if (!filtered_scan &&
650 (tmp_chan_list->chan_number == 1 ||
651 tmp_chan_list->chan_number == 6 ||
652 tmp_chan_list->chan_number == 11))
655 /* Increment the tmp pointer to the next channel to
659 /* Stop the loop if the *next* channel is in the 1,6,11
660 set. This will cause it to be the only channel
661 scanned on the next interation */
662 if (!filtered_scan &&
663 (tmp_chan_list->chan_number == 1 ||
664 tmp_chan_list->chan_number == 6 ||
665 tmp_chan_list->chan_number == 11))
669 /* The total scan time should be less than scan command timeout
671 if (total_scan_time > MWIFIEX_MAX_TOTAL_SCAN_TIME) {
672 dev_err(priv->adapter->dev, "total scan time %dms"
673 " is over limit (%dms), scan skipped\n",
674 total_scan_time, MWIFIEX_MAX_TOTAL_SCAN_TIME);
679 priv->adapter->scan_channels = start_chan;
681 /* Send the scan command to the firmware with the specified
683 ret = mwifiex_send_cmd_async(priv, HostCmd_CMD_802_11_SCAN,
684 HostCmd_ACT_GEN_SET, 0,
697 * This function constructs a scan command configuration structure to use
700 * Application layer or other functions can invoke network scanning
701 * with a scan configuration supplied in a user scan configuration structure.
702 * This structure is used as the basis of one or many scan command configuration
703 * commands that are sent to the command processing module and eventually to the
706 * This function creates a scan command configuration structure based on the
707 * following user supplied parameters (if present):
710 * - Number of Probes to be sent
713 * If the SSID or BSSID filter is not present, the filter is disabled/cleared.
714 * If the number of probes is not set, adapter default setting is used.
717 mwifiex_config_scan(struct mwifiex_private *priv,
718 const struct mwifiex_user_scan_cfg *user_scan_in,
719 struct mwifiex_scan_cmd_config *scan_cfg_out,
720 struct mwifiex_ie_types_chan_list_param_set **chan_list_out,
721 struct mwifiex_chan_scan_param_set *scan_chan_list,
722 u8 *max_chan_per_scan, u8 *filtered_scan,
723 u8 *scan_current_only)
725 struct mwifiex_adapter *adapter = priv->adapter;
726 struct mwifiex_ie_types_num_probes *num_probes_tlv;
727 struct mwifiex_ie_types_wildcard_ssid_params *wildcard_ssid_tlv;
728 struct mwifiex_ie_types_rates_param_set *rates_tlv;
729 const u8 zero_mac[ETH_ALEN] = { 0, 0, 0, 0, 0, 0 };
741 u8 rates[MWIFIEX_SUPPORTED_RATES];
743 struct mwifiex_ie_types_htcap *ht_cap;
745 /* The tlv_buf_len is calculated for each scan command. The TLVs added
746 in this routine will be preserved since the routine that sends the
747 command will append channelTLVs at *chan_list_out. The difference
748 between the *chan_list_out and the tlv_buf start will be used to
749 calculate the size of anything we add in this routine. */
750 scan_cfg_out->tlv_buf_len = 0;
752 /* Running tlv pointer. Assigned to chan_list_out at end of function
753 so later routines know where channels can be added to the command
755 tlv_pos = scan_cfg_out->tlv_buf;
757 /* Initialize the scan as un-filtered; the flag is later set to TRUE
758 below if a SSID or BSSID filter is sent in the command */
759 *filtered_scan = false;
761 /* Initialize the scan as not being only on the current channel. If
762 the channel list is customized, only contains one channel, and is
763 the active channel, this is set true and data flow is not halted. */
764 *scan_current_only = false;
768 /* Default the ssid_filter flag to TRUE, set false under
769 certain wildcard conditions and qualified by the existence
770 of an SSID list before marking the scan as filtered */
773 /* Set the BSS type scan filter, use Adapter setting if
775 scan_cfg_out->bss_mode =
776 (user_scan_in->bss_mode ? (u8) user_scan_in->
777 bss_mode : (u8) adapter->scan_mode);
779 /* Set the number of probes to send, use Adapter setting
782 (user_scan_in->num_probes ? user_scan_in->
783 num_probes : adapter->scan_probes);
786 * Set the BSSID filter to the incoming configuration,
787 * if non-zero. If not set, it will remain disabled
790 memcpy(scan_cfg_out->specific_bssid,
791 user_scan_in->specific_bssid,
792 sizeof(scan_cfg_out->specific_bssid));
794 for (i = 0; i < user_scan_in->num_ssids; i++) {
795 ssid_len = user_scan_in->ssid_list[i].ssid_len;
798 (struct mwifiex_ie_types_wildcard_ssid_params *)
800 wildcard_ssid_tlv->header.type =
801 cpu_to_le16(TLV_TYPE_WILDCARDSSID);
802 wildcard_ssid_tlv->header.len = cpu_to_le16(
803 (u16) (ssid_len + sizeof(wildcard_ssid_tlv->
807 * max_ssid_length = 0 tells firmware to perform
808 * specific scan for the SSID filled, whereas
809 * max_ssid_length = IEEE80211_MAX_SSID_LEN is for
813 wildcard_ssid_tlv->max_ssid_length = 0;
815 wildcard_ssid_tlv->max_ssid_length =
816 IEEE80211_MAX_SSID_LEN;
818 memcpy(wildcard_ssid_tlv->ssid,
819 user_scan_in->ssid_list[i].ssid, ssid_len);
821 tlv_pos += (sizeof(wildcard_ssid_tlv->header)
822 + le16_to_cpu(wildcard_ssid_tlv->header.len));
824 dev_dbg(adapter->dev, "info: scan: ssid[%d]: %s, %d\n",
825 i, wildcard_ssid_tlv->ssid,
826 wildcard_ssid_tlv->max_ssid_length);
828 /* Empty wildcard ssid with a maxlen will match many or
829 potentially all SSIDs (maxlen == 32), therefore do
830 not treat the scan as
832 if (!ssid_len && wildcard_ssid_tlv->max_ssid_length)
837 * The default number of channels sent in the command is low to
838 * ensure the response buffer from the firmware does not
839 * truncate scan results. That is not an issue with an SSID
840 * or BSSID filter applied to the scan results in the firmware.
842 if ((i && ssid_filter) ||
843 memcmp(scan_cfg_out->specific_bssid, &zero_mac,
845 *filtered_scan = true;
847 scan_cfg_out->bss_mode = (u8) adapter->scan_mode;
848 num_probes = adapter->scan_probes;
852 * If a specific BSSID or SSID is used, the number of channels in the
853 * scan command will be increased to the absolute maximum.
856 *max_chan_per_scan = MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN;
858 *max_chan_per_scan = MWIFIEX_DEF_CHANNELS_PER_SCAN_CMD;
860 /* If the input config or adapter has the number of Probes set,
864 dev_dbg(adapter->dev, "info: scan: num_probes = %d\n",
867 num_probes_tlv = (struct mwifiex_ie_types_num_probes *) tlv_pos;
868 num_probes_tlv->header.type = cpu_to_le16(TLV_TYPE_NUMPROBES);
869 num_probes_tlv->header.len =
870 cpu_to_le16(sizeof(num_probes_tlv->num_probes));
871 num_probes_tlv->num_probes = cpu_to_le16((u16) num_probes);
873 tlv_pos += sizeof(num_probes_tlv->header) +
874 le16_to_cpu(num_probes_tlv->header.len);
878 /* Append rates tlv */
879 memset(rates, 0, sizeof(rates));
881 rates_size = mwifiex_get_supported_rates(priv, rates);
883 rates_tlv = (struct mwifiex_ie_types_rates_param_set *) tlv_pos;
884 rates_tlv->header.type = cpu_to_le16(WLAN_EID_SUPP_RATES);
885 rates_tlv->header.len = cpu_to_le16((u16) rates_size);
886 memcpy(rates_tlv->rates, rates, rates_size);
887 tlv_pos += sizeof(rates_tlv->header) + rates_size;
889 dev_dbg(adapter->dev, "info: SCAN_CMD: Rates size = %d\n", rates_size);
891 if (ISSUPP_11NENABLED(priv->adapter->fw_cap_info) &&
892 (priv->adapter->config_bands & BAND_GN ||
893 priv->adapter->config_bands & BAND_AN)) {
894 ht_cap = (struct mwifiex_ie_types_htcap *) tlv_pos;
895 memset(ht_cap, 0, sizeof(struct mwifiex_ie_types_htcap));
896 ht_cap->header.type = cpu_to_le16(WLAN_EID_HT_CAPABILITY);
898 cpu_to_le16(sizeof(struct ieee80211_ht_cap));
900 mwifiex_band_to_radio_type(priv->adapter->config_bands);
901 mwifiex_fill_cap_info(priv, radio_type, ht_cap);
902 tlv_pos += sizeof(struct mwifiex_ie_types_htcap);
905 /* Append vendor specific IE TLV */
906 mwifiex_cmd_append_vsie_tlv(priv, MWIFIEX_VSIE_MASK_SCAN, &tlv_pos);
909 * Set the output for the channel TLV to the address in the tlv buffer
910 * past any TLVs that were added in this function (SSID, num_probes).
911 * Channel TLVs will be added past this for each scan command,
912 * preserving the TLVs that were previously added.
915 (struct mwifiex_ie_types_chan_list_param_set *) tlv_pos;
917 if (user_scan_in && user_scan_in->chan_list[0].chan_number) {
919 dev_dbg(adapter->dev, "info: Scan: Using supplied channel list\n");
922 chan_idx < MWIFIEX_USER_SCAN_CHAN_MAX &&
923 user_scan_in->chan_list[chan_idx].chan_number;
926 channel = user_scan_in->chan_list[chan_idx].chan_number;
927 (scan_chan_list + chan_idx)->chan_number = channel;
930 user_scan_in->chan_list[chan_idx].radio_type;
931 (scan_chan_list + chan_idx)->radio_type = radio_type;
933 scan_type = user_scan_in->chan_list[chan_idx].scan_type;
935 if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE)
937 chan_idx)->chan_scan_mode_bitmap
938 |= MWIFIEX_PASSIVE_SCAN;
941 chan_idx)->chan_scan_mode_bitmap
942 &= ~MWIFIEX_PASSIVE_SCAN;
944 if (user_scan_in->chan_list[chan_idx].scan_time) {
945 scan_dur = (u16) user_scan_in->
946 chan_list[chan_idx].scan_time;
948 if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE)
949 scan_dur = adapter->passive_scan_time;
950 else if (*filtered_scan)
951 scan_dur = adapter->specific_scan_time;
953 scan_dur = adapter->active_scan_time;
956 (scan_chan_list + chan_idx)->min_scan_time =
957 cpu_to_le16(scan_dur);
958 (scan_chan_list + chan_idx)->max_scan_time =
959 cpu_to_le16(scan_dur);
962 /* Check if we are only scanning the current channel */
963 if ((chan_idx == 1) &&
964 (user_scan_in->chan_list[0].chan_number ==
965 priv->curr_bss_params.bss_descriptor.channel)) {
966 *scan_current_only = true;
967 dev_dbg(adapter->dev,
968 "info: Scan: Scanning current channel only\n");
972 dev_dbg(adapter->dev,
973 "info: Scan: Creating full region channel list\n");
974 chan_num = mwifiex_scan_create_channel_list(priv, user_scan_in,
980 * In associated state we will reduce the number of channels scanned per
981 * scan command to avoid any traffic delay/loss. This number is decided
982 * based on total number of channels to be scanned due to constraints
983 * of command buffers.
985 if (priv->media_connected) {
986 if (chan_num < MWIFIEX_LIMIT_1_CHANNEL_PER_SCAN_CMD)
987 *max_chan_per_scan = 1;
988 else if (chan_num < MWIFIEX_LIMIT_2_CHANNELS_PER_SCAN_CMD)
989 *max_chan_per_scan = 2;
990 else if (chan_num < MWIFIEX_LIMIT_3_CHANNELS_PER_SCAN_CMD)
991 *max_chan_per_scan = 3;
996 * This function inspects the scan response buffer for pointers to
999 * TLVs can be included at the end of the scan response BSS information.
1001 * Data in the buffer is parsed pointers to TLVs that can potentially
1002 * be passed back in the response.
1005 mwifiex_ret_802_11_scan_get_tlv_ptrs(struct mwifiex_adapter *adapter,
1006 struct mwifiex_ie_types_data *tlv,
1007 u32 tlv_buf_size, u32 req_tlv_type,
1008 struct mwifiex_ie_types_data **tlv_data)
1010 struct mwifiex_ie_types_data *current_tlv;
1016 tlv_buf_left = tlv_buf_size;
1019 dev_dbg(adapter->dev, "info: SCAN_RESP: tlv_buf_size = %d\n",
1022 while (tlv_buf_left >= sizeof(struct mwifiex_ie_types_header)) {
1024 tlv_type = le16_to_cpu(current_tlv->header.type);
1025 tlv_len = le16_to_cpu(current_tlv->header.len);
1027 if (sizeof(tlv->header) + tlv_len > tlv_buf_left) {
1028 dev_err(adapter->dev, "SCAN_RESP: TLV buffer corrupt\n");
1032 if (req_tlv_type == tlv_type) {
1034 case TLV_TYPE_TSFTIMESTAMP:
1035 dev_dbg(adapter->dev, "info: SCAN_RESP: TSF "
1036 "timestamp TLV, len = %d\n", tlv_len);
1037 *tlv_data = current_tlv;
1039 case TLV_TYPE_CHANNELBANDLIST:
1040 dev_dbg(adapter->dev, "info: SCAN_RESP: channel"
1041 " band list TLV, len = %d\n", tlv_len);
1042 *tlv_data = current_tlv;
1045 dev_err(adapter->dev,
1046 "SCAN_RESP: unhandled TLV = %d\n",
1048 /* Give up, this seems corrupted */
1057 tlv_buf_left -= (sizeof(tlv->header) + tlv_len);
1059 (struct mwifiex_ie_types_data *) (current_tlv->data +
1066 * This function parses provided beacon buffer and updates
1067 * respective fields in bss descriptor structure.
1069 int mwifiex_update_bss_desc_with_ie(struct mwifiex_adapter *adapter,
1070 struct mwifiex_bssdescriptor *bss_entry)
1074 struct ieee_types_fh_param_set *fh_param_set;
1075 struct ieee_types_ds_param_set *ds_param_set;
1076 struct ieee_types_cf_param_set *cf_param_set;
1077 struct ieee_types_ibss_param_set *ibss_param_set;
1084 u8 found_data_rate_ie;
1086 struct ieee_types_vendor_specific *vendor_ie;
1087 const u8 wpa_oui[4] = { 0x00, 0x50, 0xf2, 0x01 };
1088 const u8 wmm_oui[4] = { 0x00, 0x50, 0xf2, 0x02 };
1090 found_data_rate_ie = false;
1092 current_ptr = bss_entry->beacon_buf;
1093 bytes_left = bss_entry->beacon_buf_size;
1095 /* Process variable IE */
1096 while (bytes_left >= 2) {
1097 element_id = *current_ptr;
1098 element_len = *(current_ptr + 1);
1099 total_ie_len = element_len + sizeof(struct ieee_types_header);
1101 if (bytes_left < total_ie_len) {
1102 dev_err(adapter->dev, "err: InterpretIE: in processing"
1103 " IE, bytes left < IE length\n");
1106 switch (element_id) {
1108 bss_entry->ssid.ssid_len = element_len;
1109 memcpy(bss_entry->ssid.ssid, (current_ptr + 2),
1111 dev_dbg(adapter->dev,
1112 "info: InterpretIE: ssid: %-32s\n",
1113 bss_entry->ssid.ssid);
1116 case WLAN_EID_SUPP_RATES:
1117 memcpy(bss_entry->data_rates, current_ptr + 2,
1119 memcpy(bss_entry->supported_rates, current_ptr + 2,
1121 rate_size = element_len;
1122 found_data_rate_ie = true;
1125 case WLAN_EID_FH_PARAMS:
1127 (struct ieee_types_fh_param_set *) current_ptr;
1128 memcpy(&bss_entry->phy_param_set.fh_param_set,
1130 sizeof(struct ieee_types_fh_param_set));
1133 case WLAN_EID_DS_PARAMS:
1135 (struct ieee_types_ds_param_set *) current_ptr;
1137 bss_entry->channel = ds_param_set->current_chan;
1139 memcpy(&bss_entry->phy_param_set.ds_param_set,
1141 sizeof(struct ieee_types_ds_param_set));
1144 case WLAN_EID_CF_PARAMS:
1146 (struct ieee_types_cf_param_set *) current_ptr;
1147 memcpy(&bss_entry->ss_param_set.cf_param_set,
1149 sizeof(struct ieee_types_cf_param_set));
1152 case WLAN_EID_IBSS_PARAMS:
1154 (struct ieee_types_ibss_param_set *)
1156 memcpy(&bss_entry->ss_param_set.ibss_param_set,
1158 sizeof(struct ieee_types_ibss_param_set));
1161 case WLAN_EID_ERP_INFO:
1162 bss_entry->erp_flags = *(current_ptr + 2);
1165 case WLAN_EID_EXT_SUPP_RATES:
1167 * Only process extended supported rate
1168 * if data rate is already found.
1169 * Data rate IE should come before
1170 * extended supported rate IE
1172 if (found_data_rate_ie) {
1173 if ((element_len + rate_size) >
1174 MWIFIEX_SUPPORTED_RATES)
1176 (MWIFIEX_SUPPORTED_RATES -
1179 bytes_to_copy = element_len;
1181 rate = (u8 *) bss_entry->data_rates;
1183 memcpy(rate, current_ptr + 2, bytes_to_copy);
1185 rate = (u8 *) bss_entry->supported_rates;
1187 memcpy(rate, current_ptr + 2, bytes_to_copy);
1191 case WLAN_EID_VENDOR_SPECIFIC:
1192 vendor_ie = (struct ieee_types_vendor_specific *)
1196 (vendor_ie->vend_hdr.oui, wpa_oui,
1198 bss_entry->bcn_wpa_ie =
1199 (struct ieee_types_vendor_specific *)
1201 bss_entry->wpa_offset = (u16)
1202 (current_ptr - bss_entry->beacon_buf);
1203 } else if (!memcmp(vendor_ie->vend_hdr.oui, wmm_oui,
1206 sizeof(struct ieee_types_wmm_parameter) ||
1208 sizeof(struct ieee_types_wmm_info))
1210 * Only accept and copy the WMM IE if
1211 * it matches the size expected for the
1212 * WMM Info IE or the WMM Parameter IE.
1214 memcpy((u8 *) &bss_entry->wmm_ie,
1215 current_ptr, total_ie_len);
1219 bss_entry->bcn_rsn_ie =
1220 (struct ieee_types_generic *) current_ptr;
1221 bss_entry->rsn_offset = (u16) (current_ptr -
1222 bss_entry->beacon_buf);
1224 case WLAN_EID_BSS_AC_ACCESS_DELAY:
1225 bss_entry->bcn_wapi_ie =
1226 (struct ieee_types_generic *) current_ptr;
1227 bss_entry->wapi_offset = (u16) (current_ptr -
1228 bss_entry->beacon_buf);
1230 case WLAN_EID_HT_CAPABILITY:
1231 bss_entry->bcn_ht_cap = (struct ieee80211_ht_cap *)
1233 sizeof(struct ieee_types_header));
1234 bss_entry->ht_cap_offset = (u16) (current_ptr +
1235 sizeof(struct ieee_types_header) -
1236 bss_entry->beacon_buf);
1238 case WLAN_EID_HT_OPERATION:
1239 bss_entry->bcn_ht_oper =
1240 (struct ieee80211_ht_operation *)(current_ptr +
1241 sizeof(struct ieee_types_header));
1242 bss_entry->ht_info_offset = (u16) (current_ptr +
1243 sizeof(struct ieee_types_header) -
1244 bss_entry->beacon_buf);
1246 case WLAN_EID_BSS_COEX_2040:
1247 bss_entry->bcn_bss_co_2040 = current_ptr +
1248 sizeof(struct ieee_types_header);
1249 bss_entry->bss_co_2040_offset = (u16) (current_ptr +
1250 sizeof(struct ieee_types_header) -
1251 bss_entry->beacon_buf);
1253 case WLAN_EID_EXT_CAPABILITY:
1254 bss_entry->bcn_ext_cap = current_ptr +
1255 sizeof(struct ieee_types_header);
1256 bss_entry->ext_cap_offset = (u16) (current_ptr +
1257 sizeof(struct ieee_types_header) -
1258 bss_entry->beacon_buf);
1264 current_ptr += element_len + 2;
1266 /* Need to account for IE ID and IE Len */
1267 bytes_left -= (element_len + 2);
1269 } /* while (bytes_left > 2) */
1274 * This function converts radio type scan parameter to a band configuration
1275 * to be used in join command.
1278 mwifiex_radio_type_to_band(u8 radio_type)
1280 switch (radio_type) {
1281 case HostCmd_SCAN_RADIO_TYPE_A:
1283 case HostCmd_SCAN_RADIO_TYPE_BG:
1290 * This is an internal function used to start a scan based on an input
1293 * This uses the input user scan configuration information when provided in
1294 * order to send the appropriate scan commands to firmware to populate or
1295 * update the internal driver scan table.
1297 int mwifiex_scan_networks(struct mwifiex_private *priv,
1298 const struct mwifiex_user_scan_cfg *user_scan_in)
1301 struct mwifiex_adapter *adapter = priv->adapter;
1302 struct cmd_ctrl_node *cmd_node;
1303 union mwifiex_scan_cmd_config_tlv *scan_cfg_out;
1304 struct mwifiex_ie_types_chan_list_param_set *chan_list_out;
1306 struct mwifiex_chan_scan_param_set *scan_chan_list;
1308 u8 scan_current_chan_only;
1309 u8 max_chan_per_scan;
1310 unsigned long flags;
1312 if (adapter->scan_processing) {
1313 dev_dbg(adapter->dev, "cmd: Scan already in process...\n");
1317 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
1318 adapter->scan_processing = true;
1319 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
1321 if (priv->scan_block) {
1322 dev_dbg(adapter->dev,
1323 "cmd: Scan is blocked during association...\n");
1327 scan_cfg_out = kzalloc(sizeof(union mwifiex_scan_cmd_config_tlv),
1329 if (!scan_cfg_out) {
1330 dev_err(adapter->dev, "failed to alloc scan_cfg_out\n");
1334 buf_size = sizeof(struct mwifiex_chan_scan_param_set) *
1335 MWIFIEX_USER_SCAN_CHAN_MAX;
1336 scan_chan_list = kzalloc(buf_size, GFP_KERNEL);
1337 if (!scan_chan_list) {
1338 dev_err(adapter->dev, "failed to alloc scan_chan_list\n");
1339 kfree(scan_cfg_out);
1343 mwifiex_config_scan(priv, user_scan_in, &scan_cfg_out->config,
1344 &chan_list_out, scan_chan_list, &max_chan_per_scan,
1345 &filtered_scan, &scan_current_chan_only);
1347 ret = mwifiex_scan_channel_list(priv, max_chan_per_scan, filtered_scan,
1348 &scan_cfg_out->config, chan_list_out,
1351 /* Get scan command from scan_pending_q and put to cmd_pending_q */
1353 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
1354 if (!list_empty(&adapter->scan_pending_q)) {
1355 cmd_node = list_first_entry(&adapter->scan_pending_q,
1356 struct cmd_ctrl_node, list);
1357 list_del(&cmd_node->list);
1358 spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
1360 adapter->cmd_queued = cmd_node;
1361 mwifiex_insert_cmd_to_pending_q(adapter, cmd_node,
1363 queue_work(adapter->workqueue, &adapter->main_work);
1365 spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
1369 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
1370 adapter->scan_processing = true;
1371 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
1374 kfree(scan_cfg_out);
1375 kfree(scan_chan_list);
1380 * This function prepares a scan command to be sent to the firmware.
1382 * This uses the scan command configuration sent to the command processing
1383 * module in command preparation stage to configure a scan command structure
1384 * to send to firmware.
1386 * The fixed fields specifying the BSS type and BSSID filters as well as a
1387 * variable number/length of TLVs are sent in the command to firmware.
1389 * Preparation also includes -
1390 * - Setting command ID, and proper size
1391 * - Ensuring correct endian-ness
1393 int mwifiex_cmd_802_11_scan(struct host_cmd_ds_command *cmd,
1394 struct mwifiex_scan_cmd_config *scan_cfg)
1396 struct host_cmd_ds_802_11_scan *scan_cmd = &cmd->params.scan;
1398 /* Set fixed field variables in scan command */
1399 scan_cmd->bss_mode = scan_cfg->bss_mode;
1400 memcpy(scan_cmd->bssid, scan_cfg->specific_bssid,
1401 sizeof(scan_cmd->bssid));
1402 memcpy(scan_cmd->tlv_buffer, scan_cfg->tlv_buf, scan_cfg->tlv_buf_len);
1404 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_SCAN);
1406 /* Size is equal to the sizeof(fixed portions) + the TLV len + header */
1407 cmd->size = cpu_to_le16((u16) (sizeof(scan_cmd->bss_mode)
1408 + sizeof(scan_cmd->bssid)
1409 + scan_cfg->tlv_buf_len + S_DS_GEN));
1415 * This function checks compatibility of requested network with current
1418 int mwifiex_check_network_compatibility(struct mwifiex_private *priv,
1419 struct mwifiex_bssdescriptor *bss_desc)
1426 if ((mwifiex_get_cfp(priv, (u8) bss_desc->bss_band,
1427 (u16) bss_desc->channel, 0))) {
1428 switch (priv->bss_mode) {
1429 case NL80211_IFTYPE_STATION:
1430 case NL80211_IFTYPE_ADHOC:
1431 ret = mwifiex_is_network_compatible(priv, bss_desc,
1434 dev_err(priv->adapter->dev, "cannot find ssid "
1435 "%s\n", bss_desc->ssid.ssid);
1445 static int mwifiex_update_curr_bss_params(struct mwifiex_private *priv,
1446 struct cfg80211_bss *bss)
1448 struct mwifiex_bssdescriptor *bss_desc;
1450 unsigned long flags;
1452 /* Allocate and fill new bss descriptor */
1453 bss_desc = kzalloc(sizeof(struct mwifiex_bssdescriptor),
1456 dev_err(priv->adapter->dev, " failed to alloc bss_desc\n");
1460 ret = mwifiex_fill_new_bss_desc(priv, bss, bss_desc);
1464 ret = mwifiex_check_network_compatibility(priv, bss_desc);
1468 /* Update current bss descriptor parameters */
1469 spin_lock_irqsave(&priv->curr_bcn_buf_lock, flags);
1470 priv->curr_bss_params.bss_descriptor.bcn_wpa_ie = NULL;
1471 priv->curr_bss_params.bss_descriptor.wpa_offset = 0;
1472 priv->curr_bss_params.bss_descriptor.bcn_rsn_ie = NULL;
1473 priv->curr_bss_params.bss_descriptor.rsn_offset = 0;
1474 priv->curr_bss_params.bss_descriptor.bcn_wapi_ie = NULL;
1475 priv->curr_bss_params.bss_descriptor.wapi_offset = 0;
1476 priv->curr_bss_params.bss_descriptor.bcn_ht_cap = NULL;
1477 priv->curr_bss_params.bss_descriptor.ht_cap_offset =
1479 priv->curr_bss_params.bss_descriptor.bcn_ht_oper = NULL;
1480 priv->curr_bss_params.bss_descriptor.ht_info_offset =
1482 priv->curr_bss_params.bss_descriptor.bcn_bss_co_2040 =
1484 priv->curr_bss_params.bss_descriptor.
1485 bss_co_2040_offset = 0;
1486 priv->curr_bss_params.bss_descriptor.bcn_ext_cap = NULL;
1487 priv->curr_bss_params.bss_descriptor.ext_cap_offset = 0;
1488 priv->curr_bss_params.bss_descriptor.beacon_buf = NULL;
1489 priv->curr_bss_params.bss_descriptor.beacon_buf_size =
1492 /* Make a copy of current BSSID descriptor */
1493 memcpy(&priv->curr_bss_params.bss_descriptor, bss_desc,
1494 sizeof(priv->curr_bss_params.bss_descriptor));
1495 mwifiex_save_curr_bcn(priv);
1496 spin_unlock_irqrestore(&priv->curr_bcn_buf_lock, flags);
1504 * This function handles the command response of scan.
1506 * The response buffer for the scan command has the following
1509 * .-------------------------------------------------------------.
1510 * | Header (4 * sizeof(t_u16)): Standard command response hdr |
1511 * .-------------------------------------------------------------.
1512 * | BufSize (t_u16) : sizeof the BSS Description data |
1513 * .-------------------------------------------------------------.
1514 * | NumOfSet (t_u8) : Number of BSS Descs returned |
1515 * .-------------------------------------------------------------.
1516 * | BSSDescription data (variable, size given in BufSize) |
1517 * .-------------------------------------------------------------.
1518 * | TLV data (variable, size calculated using Header->Size, |
1519 * | BufSize and sizeof the fixed fields above) |
1520 * .-------------------------------------------------------------.
1522 int mwifiex_ret_802_11_scan(struct mwifiex_private *priv,
1523 struct host_cmd_ds_command *resp)
1526 struct mwifiex_adapter *adapter = priv->adapter;
1527 struct cmd_ctrl_node *cmd_node;
1528 struct host_cmd_ds_802_11_scan_rsp *scan_rsp;
1529 struct mwifiex_ie_types_data *tlv_data;
1530 struct mwifiex_ie_types_tsf_timestamp *tsf_tlv;
1536 struct mwifiex_chan_freq_power *cfp;
1537 struct mwifiex_ie_types_chan_band_list_param_set *chan_band_tlv;
1538 struct chan_band_param_set *chan_band;
1540 unsigned long flags;
1541 struct cfg80211_bss *bss;
1543 is_bgscan_resp = (le16_to_cpu(resp->command)
1544 == HostCmd_CMD_802_11_BG_SCAN_QUERY);
1546 scan_rsp = &resp->params.bg_scan_query_resp.scan_resp;
1548 scan_rsp = &resp->params.scan_resp;
1551 if (scan_rsp->number_of_sets > MWIFIEX_MAX_AP) {
1552 dev_err(adapter->dev, "SCAN_RESP: too many AP returned (%d)\n",
1553 scan_rsp->number_of_sets);
1558 bytes_left = le16_to_cpu(scan_rsp->bss_descript_size);
1559 dev_dbg(adapter->dev, "info: SCAN_RESP: bss_descript_size %d\n",
1562 scan_resp_size = le16_to_cpu(resp->size);
1564 dev_dbg(adapter->dev,
1565 "info: SCAN_RESP: returned %d APs before parsing\n",
1566 scan_rsp->number_of_sets);
1568 bss_info = scan_rsp->bss_desc_and_tlv_buffer;
1571 * The size of the TLV buffer is equal to the entire command response
1572 * size (scan_resp_size) minus the fixed fields (sizeof()'s), the
1573 * BSS Descriptions (bss_descript_size as bytesLef) and the command
1574 * response header (S_DS_GEN)
1576 tlv_buf_size = scan_resp_size - (bytes_left
1577 + sizeof(scan_rsp->bss_descript_size)
1578 + sizeof(scan_rsp->number_of_sets)
1581 tlv_data = (struct mwifiex_ie_types_data *) (scan_rsp->
1582 bss_desc_and_tlv_buffer +
1585 /* Search the TLV buffer space in the scan response for any valid
1587 mwifiex_ret_802_11_scan_get_tlv_ptrs(adapter, tlv_data, tlv_buf_size,
1588 TLV_TYPE_TSFTIMESTAMP,
1589 (struct mwifiex_ie_types_data **)
1592 /* Search the TLV buffer space in the scan response for any valid
1594 mwifiex_ret_802_11_scan_get_tlv_ptrs(adapter, tlv_data, tlv_buf_size,
1595 TLV_TYPE_CHANNELBANDLIST,
1596 (struct mwifiex_ie_types_data **)
1599 for (idx = 0; idx < scan_rsp->number_of_sets && bytes_left; idx++) {
1606 u16 beacon_size = 0;
1610 u16 cap_info_bitmap;
1613 struct mwifiex_bcn_param *bcn_param;
1614 struct mwifiex_bss_priv *bss_priv;
1616 if (bytes_left >= sizeof(beacon_size)) {
1617 /* Extract & convert beacon size from command buffer */
1618 memcpy(&beacon_size, bss_info, sizeof(beacon_size));
1619 bytes_left -= sizeof(beacon_size);
1620 bss_info += sizeof(beacon_size);
1623 if (!beacon_size || beacon_size > bytes_left) {
1624 bss_info += bytes_left;
1629 /* Initialize the current working beacon pointer for this BSS
1631 current_ptr = bss_info;
1633 /* Advance the return beacon pointer past the current beacon */
1634 bss_info += beacon_size;
1635 bytes_left -= beacon_size;
1637 curr_bcn_bytes = beacon_size;
1640 * First 5 fields are bssid, RSSI, time stamp, beacon interval,
1641 * and capability information
1643 if (curr_bcn_bytes < sizeof(struct mwifiex_bcn_param)) {
1644 dev_err(adapter->dev,
1645 "InterpretIE: not enough bytes left\n");
1648 bcn_param = (struct mwifiex_bcn_param *)current_ptr;
1649 current_ptr += sizeof(*bcn_param);
1650 curr_bcn_bytes -= sizeof(*bcn_param);
1652 memcpy(bssid, bcn_param->bssid, ETH_ALEN);
1654 rssi = (s32) bcn_param->rssi;
1655 rssi = (-rssi) * 100; /* Convert dBm to mBm */
1656 dev_dbg(adapter->dev, "info: InterpretIE: RSSI=%d\n", rssi);
1658 timestamp = le64_to_cpu(bcn_param->timestamp);
1659 beacon_period = le16_to_cpu(bcn_param->beacon_period);
1661 cap_info_bitmap = le16_to_cpu(bcn_param->cap_info_bitmap);
1662 dev_dbg(adapter->dev, "info: InterpretIE: capabilities=0x%X\n",
1665 /* Rest of the current buffer are IE's */
1666 ie_buf = current_ptr;
1667 ie_len = curr_bcn_bytes;
1668 dev_dbg(adapter->dev,
1669 "info: InterpretIE: IELength for this AP = %d\n",
1672 while (curr_bcn_bytes >= sizeof(struct ieee_types_header)) {
1673 u8 element_id, element_len;
1675 element_id = *current_ptr;
1676 element_len = *(current_ptr + 1);
1677 if (curr_bcn_bytes < element_len +
1678 sizeof(struct ieee_types_header)) {
1679 dev_err(priv->adapter->dev,
1680 "%s: bytes left < IE length\n",
1684 if (element_id == WLAN_EID_DS_PARAMS) {
1685 channel = *(current_ptr + sizeof(struct ieee_types_header));
1689 current_ptr += element_len +
1690 sizeof(struct ieee_types_header);
1691 curr_bcn_bytes -= element_len +
1692 sizeof(struct ieee_types_header);
1696 * If the TSF TLV was appended to the scan results, save this
1697 * entry's TSF value in the fw_tsf field. It is the firmware's
1698 * TSF value at the time the beacon or probe response was
1702 memcpy(&fw_tsf, &tsf_tlv->tsf_data[idx * TSF_DATA_SIZE],
1706 struct ieee80211_channel *chan;
1710 if (chan_band_tlv) {
1712 &chan_band_tlv->chan_band_param[idx];
1713 band = mwifiex_radio_type_to_band(
1714 chan_band->radio_type
1715 & (BIT(0) | BIT(1)));
1718 cfp = mwifiex_get_cfp(priv, band, channel, 0);
1720 freq = cfp ? cfp->freq : 0;
1722 chan = ieee80211_get_channel(priv->wdev->wiphy, freq);
1724 if (chan && !(chan->flags & IEEE80211_CHAN_DISABLED)) {
1725 bss = cfg80211_inform_bss(priv->wdev->wiphy,
1726 chan, bssid, timestamp,
1727 cap_info_bitmap, beacon_period,
1728 ie_buf, ie_len, rssi, GFP_KERNEL);
1729 bss_priv = (struct mwifiex_bss_priv *)bss->priv;
1730 bss_priv->band = band;
1731 bss_priv->fw_tsf = fw_tsf;
1732 if (priv->media_connected &&
1734 priv->curr_bss_params.bss_descriptor
1735 .mac_address, ETH_ALEN))
1736 mwifiex_update_curr_bss_params(priv,
1738 cfg80211_put_bss(bss);
1741 dev_dbg(adapter->dev, "missing BSS channel IE\n");
1745 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
1746 if (list_empty(&adapter->scan_pending_q)) {
1747 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
1748 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
1749 adapter->scan_processing = false;
1750 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
1752 /* Need to indicate IOCTL complete */
1753 if (adapter->curr_cmd->wait_q_enabled) {
1754 adapter->cmd_wait_q.status = 0;
1755 mwifiex_complete_cmd(adapter, adapter->curr_cmd);
1757 if (priv->report_scan_result)
1758 priv->report_scan_result = false;
1759 if (priv->scan_pending_on_block) {
1760 priv->scan_pending_on_block = false;
1761 up(&priv->async_sem);
1764 if (priv->user_scan_cfg) {
1765 dev_dbg(priv->adapter->dev,
1766 "info: %s: sending scan results\n", __func__);
1767 cfg80211_scan_done(priv->scan_request, 0);
1768 priv->scan_request = NULL;
1769 kfree(priv->user_scan_cfg);
1770 priv->user_scan_cfg = NULL;
1773 if (!mwifiex_wmm_lists_empty(adapter)) {
1774 spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
1776 adapter->scan_delay_cnt = 1;
1777 mod_timer(&priv->scan_delay_timer, jiffies +
1778 msecs_to_jiffies(MWIFIEX_SCAN_DELAY_MSEC));
1780 /* Get scan command from scan_pending_q and put to
1782 cmd_node = list_first_entry(&adapter->scan_pending_q,
1783 struct cmd_ctrl_node, list);
1784 list_del(&cmd_node->list);
1785 spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
1787 mwifiex_insert_cmd_to_pending_q(adapter, cmd_node,
1797 * This function prepares command for background scan query.
1799 * Preparation includes -
1800 * - Setting command ID and proper size
1801 * - Setting background scan flush parameter
1802 * - Ensuring correct endian-ness
1804 int mwifiex_cmd_802_11_bg_scan_query(struct host_cmd_ds_command *cmd)
1806 struct host_cmd_ds_802_11_bg_scan_query *bg_query =
1807 &cmd->params.bg_scan_query;
1809 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_BG_SCAN_QUERY);
1810 cmd->size = cpu_to_le16(sizeof(struct host_cmd_ds_802_11_bg_scan_query)
1813 bg_query->flush = 1;
1819 * This function inserts scan command node to the scan pending queue.
1822 mwifiex_queue_scan_cmd(struct mwifiex_private *priv,
1823 struct cmd_ctrl_node *cmd_node)
1825 struct mwifiex_adapter *adapter = priv->adapter;
1826 unsigned long flags;
1828 cmd_node->wait_q_enabled = true;
1829 cmd_node->condition = &adapter->scan_wait_q_woken;
1830 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
1831 list_add_tail(&cmd_node->list, &adapter->scan_pending_q);
1832 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
1836 * This function sends a scan command for all available channels to the
1837 * firmware, filtered on a specific SSID.
1839 static int mwifiex_scan_specific_ssid(struct mwifiex_private *priv,
1840 struct cfg80211_ssid *req_ssid)
1842 struct mwifiex_adapter *adapter = priv->adapter;
1844 struct mwifiex_user_scan_cfg *scan_cfg;
1849 if (adapter->scan_processing) {
1850 dev_dbg(adapter->dev, "cmd: Scan already in process...\n");
1854 if (priv->scan_block) {
1855 dev_dbg(adapter->dev,
1856 "cmd: Scan is blocked during association...\n");
1860 scan_cfg = kzalloc(sizeof(struct mwifiex_user_scan_cfg), GFP_KERNEL);
1862 dev_err(adapter->dev, "failed to alloc scan_cfg\n");
1866 scan_cfg->ssid_list = req_ssid;
1867 scan_cfg->num_ssids = 1;
1869 ret = mwifiex_scan_networks(priv, scan_cfg);
1876 * Sends IOCTL request to start a scan.
1878 * This function allocates the IOCTL request buffer, fills it
1879 * with requisite parameters and calls the IOCTL handler.
1881 * Scan command can be issued for both normal scan and specific SSID
1882 * scan, depending upon whether an SSID is provided or not.
1884 int mwifiex_request_scan(struct mwifiex_private *priv,
1885 struct cfg80211_ssid *req_ssid)
1889 if (down_interruptible(&priv->async_sem)) {
1890 dev_err(priv->adapter->dev, "%s: acquire semaphore\n",
1894 priv->scan_pending_on_block = true;
1896 priv->adapter->scan_wait_q_woken = false;
1898 if (req_ssid && req_ssid->ssid_len != 0)
1899 /* Specific SSID scan */
1900 ret = mwifiex_scan_specific_ssid(priv, req_ssid);
1903 ret = mwifiex_scan_networks(priv, NULL);
1906 ret = mwifiex_wait_queue_complete(priv->adapter);
1909 priv->scan_pending_on_block = false;
1910 up(&priv->async_sem);
1917 * This function appends the vendor specific IE TLV to a buffer.
1920 mwifiex_cmd_append_vsie_tlv(struct mwifiex_private *priv,
1921 u16 vsie_mask, u8 **buffer)
1923 int id, ret_len = 0;
1924 struct mwifiex_ie_types_vendor_param_set *vs_param_set;
1932 * Traverse through the saved vendor specific IE array and append
1933 * the selected(scan/assoc/adhoc) IE as TLV to the command
1935 for (id = 0; id < MWIFIEX_MAX_VSIE_NUM; id++) {
1936 if (priv->vs_ie[id].mask & vsie_mask) {
1938 (struct mwifiex_ie_types_vendor_param_set *)
1940 vs_param_set->header.type =
1941 cpu_to_le16(TLV_TYPE_PASSTHROUGH);
1942 vs_param_set->header.len =
1943 cpu_to_le16((((u16) priv->vs_ie[id].ie[1])
1945 memcpy(vs_param_set->ie, priv->vs_ie[id].ie,
1946 le16_to_cpu(vs_param_set->header.len));
1947 *buffer += le16_to_cpu(vs_param_set->header.len) +
1948 sizeof(struct mwifiex_ie_types_header);
1949 ret_len += le16_to_cpu(vs_param_set->header.len) +
1950 sizeof(struct mwifiex_ie_types_header);
1957 * This function saves a beacon buffer of the current BSS descriptor.
1959 * The current beacon buffer is saved so that it can be restored in the
1960 * following cases that makes the beacon buffer not to contain the current
1961 * ssid's beacon buffer.
1962 * - The current ssid was not found somehow in the last scan.
1963 * - The current ssid was the last entry of the scan table and overloaded.
1966 mwifiex_save_curr_bcn(struct mwifiex_private *priv)
1968 struct mwifiex_bssdescriptor *curr_bss =
1969 &priv->curr_bss_params.bss_descriptor;
1971 if (!curr_bss->beacon_buf_size)
1974 /* allocate beacon buffer at 1st time; or if it's size has changed */
1975 if (!priv->curr_bcn_buf ||
1976 priv->curr_bcn_size != curr_bss->beacon_buf_size) {
1977 priv->curr_bcn_size = curr_bss->beacon_buf_size;
1979 kfree(priv->curr_bcn_buf);
1980 priv->curr_bcn_buf = kmalloc(curr_bss->beacon_buf_size,
1982 if (!priv->curr_bcn_buf) {
1983 dev_err(priv->adapter->dev,
1984 "failed to alloc curr_bcn_buf\n");
1989 memcpy(priv->curr_bcn_buf, curr_bss->beacon_buf,
1990 curr_bss->beacon_buf_size);
1991 dev_dbg(priv->adapter->dev, "info: current beacon saved %d\n",
1992 priv->curr_bcn_size);
1994 curr_bss->beacon_buf = priv->curr_bcn_buf;
1996 /* adjust the pointers in the current BSS descriptor */
1997 if (curr_bss->bcn_wpa_ie)
1998 curr_bss->bcn_wpa_ie =
1999 (struct ieee_types_vendor_specific *)
2000 (curr_bss->beacon_buf +
2001 curr_bss->wpa_offset);
2003 if (curr_bss->bcn_rsn_ie)
2004 curr_bss->bcn_rsn_ie = (struct ieee_types_generic *)
2005 (curr_bss->beacon_buf +
2006 curr_bss->rsn_offset);
2008 if (curr_bss->bcn_ht_cap)
2009 curr_bss->bcn_ht_cap = (struct ieee80211_ht_cap *)
2010 (curr_bss->beacon_buf +
2011 curr_bss->ht_cap_offset);
2013 if (curr_bss->bcn_ht_oper)
2014 curr_bss->bcn_ht_oper = (struct ieee80211_ht_operation *)
2015 (curr_bss->beacon_buf +
2016 curr_bss->ht_info_offset);
2018 if (curr_bss->bcn_bss_co_2040)
2019 curr_bss->bcn_bss_co_2040 =
2020 (curr_bss->beacon_buf + curr_bss->bss_co_2040_offset);
2022 if (curr_bss->bcn_ext_cap)
2023 curr_bss->bcn_ext_cap = curr_bss->beacon_buf +
2024 curr_bss->ext_cap_offset;
2028 * This function frees the current BSS descriptor beacon buffer.
2031 mwifiex_free_curr_bcn(struct mwifiex_private *priv)
2033 kfree(priv->curr_bcn_buf);
2034 priv->curr_bcn_buf = NULL;