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_CHANNELS_PER_SCAN_CMD 4
33 /* Memory needed to store a max sized Channel List TLV for a firmware scan */
34 #define CHAN_TLV_MAX_SIZE (sizeof(struct mwifiex_ie_types_header) \
35 + (MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN \
36 *sizeof(struct mwifiex_chan_scan_param_set)))
38 /* Memory needed to store supported rate */
39 #define RATE_TLV_MAX_SIZE (sizeof(struct mwifiex_ie_types_rates_param_set) \
40 + HOSTCMD_SUPPORTED_RATES)
42 /* Memory needed to store a max number/size WildCard SSID TLV for a firmware
44 #define WILDCARD_SSID_TLV_MAX_SIZE \
45 (MWIFIEX_MAX_SSID_LIST_LENGTH * \
46 (sizeof(struct mwifiex_ie_types_wildcard_ssid_params) \
47 + IEEE80211_MAX_SSID_LEN))
49 /* Maximum memory needed for a mwifiex_scan_cmd_config with all TLVs at max */
50 #define MAX_SCAN_CFG_ALLOC (sizeof(struct mwifiex_scan_cmd_config) \
51 + sizeof(struct mwifiex_ie_types_num_probes) \
52 + sizeof(struct mwifiex_ie_types_htcap) \
55 + WILDCARD_SSID_TLV_MAX_SIZE)
58 union mwifiex_scan_cmd_config_tlv {
59 /* Scan configuration (variable length) */
60 struct mwifiex_scan_cmd_config config;
61 /* Max allocated block */
62 u8 config_alloc_buf[MAX_SCAN_CFG_ALLOC];
70 static u8 mwifiex_wpa_oui[CIPHER_SUITE_MAX][4] = {
71 { 0x00, 0x50, 0xf2, 0x02 }, /* TKIP */
72 { 0x00, 0x50, 0xf2, 0x04 }, /* AES */
74 static u8 mwifiex_rsn_oui[CIPHER_SUITE_MAX][4] = {
75 { 0x00, 0x0f, 0xac, 0x02 }, /* TKIP */
76 { 0x00, 0x0f, 0xac, 0x04 }, /* AES */
80 * This function parses a given IE for a given OUI.
82 * This is used to parse a WPA/RSN IE to find if it has
86 mwifiex_search_oui_in_ie(struct ie_body *iebody, u8 *oui)
90 count = iebody->ptk_cnt[0];
92 /* There could be multiple OUIs for PTK hence
94 2) Check all the OUIs for AES.
95 3) If one of them is AES then pass success. */
97 if (!memcmp(iebody->ptk_body, oui, sizeof(iebody->ptk_body)))
98 return MWIFIEX_OUI_PRESENT;
102 iebody = (struct ie_body *) ((u8 *) iebody +
103 sizeof(iebody->ptk_body));
106 pr_debug("info: %s: OUI is not found in PTK\n", __func__);
107 return MWIFIEX_OUI_NOT_PRESENT;
111 * This function checks if a given OUI is present in a RSN IE.
113 * The function first checks if a RSN IE is present or not in the
114 * BSS descriptor. It tries to locate the OUI only if such an IE is
118 mwifiex_is_rsn_oui_present(struct mwifiex_bssdescriptor *bss_desc, u32 cipher)
121 struct ie_body *iebody;
122 u8 ret = MWIFIEX_OUI_NOT_PRESENT;
124 if (((bss_desc->bcn_rsn_ie) && ((*(bss_desc->bcn_rsn_ie)).
125 ieee_hdr.element_id == WLAN_EID_RSN))) {
126 iebody = (struct ie_body *)
127 (((u8 *) bss_desc->bcn_rsn_ie->data) +
129 oui = &mwifiex_rsn_oui[cipher][0];
130 ret = mwifiex_search_oui_in_ie(iebody, oui);
138 * This function checks if a given OUI is present in a WPA IE.
140 * The function first checks if a WPA IE is present or not in the
141 * BSS descriptor. It tries to locate the OUI only if such an IE is
145 mwifiex_is_wpa_oui_present(struct mwifiex_bssdescriptor *bss_desc, u32 cipher)
148 struct ie_body *iebody;
149 u8 ret = MWIFIEX_OUI_NOT_PRESENT;
151 if (((bss_desc->bcn_wpa_ie) && ((*(bss_desc->bcn_wpa_ie)).
152 vend_hdr.element_id == WLAN_EID_WPA))) {
153 iebody = (struct ie_body *) bss_desc->bcn_wpa_ie->data;
154 oui = &mwifiex_wpa_oui[cipher][0];
155 ret = mwifiex_search_oui_in_ie(iebody, oui);
163 * This function compares two SSIDs and checks if they match.
166 mwifiex_ssid_cmp(struct cfg80211_ssid *ssid1, struct cfg80211_ssid *ssid2)
168 if (!ssid1 || !ssid2 || (ssid1->ssid_len != ssid2->ssid_len))
170 return memcmp(ssid1->ssid, ssid2->ssid, ssid1->ssid_len);
174 * This function checks if wapi is enabled in driver and scanned network is
175 * compatible with it.
178 mwifiex_is_network_compatible_for_wapi(struct mwifiex_private *priv,
179 struct mwifiex_bssdescriptor *bss_desc)
181 if (priv->sec_info.wapi_enabled &&
182 (bss_desc->bcn_wapi_ie &&
183 ((*(bss_desc->bcn_wapi_ie)).ieee_hdr.element_id ==
184 WLAN_EID_BSS_AC_ACCESS_DELAY))) {
191 * This function checks if driver is configured with no security mode and
192 * scanned network is compatible with it.
195 mwifiex_is_network_compatible_for_no_sec(struct mwifiex_private *priv,
196 struct mwifiex_bssdescriptor *bss_desc)
198 if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
199 !priv->sec_info.wpa2_enabled && ((!bss_desc->bcn_wpa_ie) ||
200 ((*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id !=
202 && ((!bss_desc->bcn_rsn_ie) ||
203 ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id !=
205 && !priv->sec_info.encryption_mode
206 && !bss_desc->privacy) {
213 * This function checks if static WEP is enabled in driver and scanned network
214 * is compatible with it.
217 mwifiex_is_network_compatible_for_static_wep(struct mwifiex_private *priv,
218 struct mwifiex_bssdescriptor *bss_desc)
220 if (priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
221 !priv->sec_info.wpa2_enabled && bss_desc->privacy) {
228 * This function checks if wpa is enabled in driver and scanned network is
229 * compatible with it.
232 mwifiex_is_network_compatible_for_wpa(struct mwifiex_private *priv,
233 struct mwifiex_bssdescriptor *bss_desc)
235 if (!priv->sec_info.wep_enabled && priv->sec_info.wpa_enabled &&
236 !priv->sec_info.wpa2_enabled && ((bss_desc->bcn_wpa_ie) &&
237 ((*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id == WLAN_EID_WPA))
239 * Privacy bit may NOT be set in some APs like
240 * LinkSys WRT54G && bss_desc->privacy
243 dev_dbg(priv->adapter->dev, "info: %s: WPA:"
244 " wpa_ie=%#x wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s "
245 "EncMode=%#x privacy=%#x\n", __func__,
246 (bss_desc->bcn_wpa_ie) ?
247 (*(bss_desc->bcn_wpa_ie)).
248 vend_hdr.element_id : 0,
249 (bss_desc->bcn_rsn_ie) ?
250 (*(bss_desc->bcn_rsn_ie)).
251 ieee_hdr.element_id : 0,
252 (priv->sec_info.wep_enabled) ? "e" : "d",
253 (priv->sec_info.wpa_enabled) ? "e" : "d",
254 (priv->sec_info.wpa2_enabled) ? "e" : "d",
255 priv->sec_info.encryption_mode,
263 * This function checks if wpa2 is enabled in driver and scanned network is
264 * compatible with it.
267 mwifiex_is_network_compatible_for_wpa2(struct mwifiex_private *priv,
268 struct mwifiex_bssdescriptor *bss_desc)
270 if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
271 priv->sec_info.wpa2_enabled && ((bss_desc->bcn_rsn_ie) &&
272 ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id == WLAN_EID_RSN))
274 * Privacy bit may NOT be set in some APs like
275 * LinkSys WRT54G && bss_desc->privacy
278 dev_dbg(priv->adapter->dev, "info: %s: WPA2: "
279 " wpa_ie=%#x wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s "
280 "EncMode=%#x privacy=%#x\n", __func__,
281 (bss_desc->bcn_wpa_ie) ?
282 (*(bss_desc->bcn_wpa_ie)).
283 vend_hdr.element_id : 0,
284 (bss_desc->bcn_rsn_ie) ?
285 (*(bss_desc->bcn_rsn_ie)).
286 ieee_hdr.element_id : 0,
287 (priv->sec_info.wep_enabled) ? "e" : "d",
288 (priv->sec_info.wpa_enabled) ? "e" : "d",
289 (priv->sec_info.wpa2_enabled) ? "e" : "d",
290 priv->sec_info.encryption_mode,
298 * This function checks if adhoc AES is enabled in driver and scanned network is
299 * compatible with it.
302 mwifiex_is_network_compatible_for_adhoc_aes(struct mwifiex_private *priv,
303 struct mwifiex_bssdescriptor *bss_desc)
305 if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
306 !priv->sec_info.wpa2_enabled && ((!bss_desc->bcn_wpa_ie) ||
307 ((*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id != WLAN_EID_WPA))
308 && ((!bss_desc->bcn_rsn_ie) || ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.
309 element_id != WLAN_EID_RSN))
310 && !priv->sec_info.encryption_mode
311 && bss_desc->privacy) {
318 * This function checks if dynamic WEP is enabled in driver and scanned network
319 * is compatible with it.
322 mwifiex_is_network_compatible_for_dynamic_wep(struct mwifiex_private *priv,
323 struct mwifiex_bssdescriptor *bss_desc)
325 if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
326 !priv->sec_info.wpa2_enabled && ((!bss_desc->bcn_wpa_ie) ||
327 ((*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id != WLAN_EID_WPA))
328 && ((!bss_desc->bcn_rsn_ie) || ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.
329 element_id != WLAN_EID_RSN))
330 && priv->sec_info.encryption_mode
331 && bss_desc->privacy) {
332 dev_dbg(priv->adapter->dev, "info: %s: dynamic "
333 "WEP: wpa_ie=%#x wpa2_ie=%#x "
334 "EncMode=%#x privacy=%#x\n",
336 (bss_desc->bcn_wpa_ie) ?
337 (*(bss_desc->bcn_wpa_ie)).
338 vend_hdr.element_id : 0,
339 (bss_desc->bcn_rsn_ie) ?
340 (*(bss_desc->bcn_rsn_ie)).
341 ieee_hdr.element_id : 0,
342 priv->sec_info.encryption_mode,
350 * This function checks if a scanned network is compatible with the driver
353 * WEP WPA WPA2 ad-hoc encrypt Network
354 * enabled enabled enabled AES mode Privacy WPA WPA2 Compatible
355 * 0 0 0 0 NONE 0 0 0 yes No security
356 * 0 1 0 0 x 1x 1 x yes WPA (disable
358 * 0 0 1 0 x 1x x 1 yes WPA2 (disable
360 * 0 0 0 1 NONE 1 0 0 yes Ad-hoc AES
361 * 1 0 0 0 NONE 1 0 0 yes Static WEP
363 * 0 0 0 0 !=NONE 1 0 0 yes Dynamic WEP
365 * Compatibility is not matched while roaming, except for mode.
368 mwifiex_is_network_compatible(struct mwifiex_private *priv,
369 struct mwifiex_bssdescriptor *bss_desc, u32 mode)
371 struct mwifiex_adapter *adapter = priv->adapter;
373 bss_desc->disable_11n = false;
375 /* Don't check for compatibility if roaming */
376 if (priv->media_connected && (priv->bss_mode == NL80211_IFTYPE_STATION)
377 && (bss_desc->bss_mode == NL80211_IFTYPE_STATION))
380 if (priv->wps.session_enable) {
381 dev_dbg(adapter->dev,
382 "info: return success directly in WPS period\n");
386 if (mwifiex_is_network_compatible_for_wapi(priv, bss_desc)) {
387 dev_dbg(adapter->dev, "info: return success for WAPI AP\n");
391 if (bss_desc->bss_mode == mode) {
392 if (mwifiex_is_network_compatible_for_no_sec(priv, bss_desc)) {
395 } else if (mwifiex_is_network_compatible_for_static_wep(priv,
397 /* Static WEP enabled */
398 dev_dbg(adapter->dev, "info: Disable 11n in WEP mode.\n");
399 bss_desc->disable_11n = true;
401 } else if (mwifiex_is_network_compatible_for_wpa(priv,
404 if (((priv->adapter->config_bands & BAND_GN
405 || priv->adapter->config_bands & BAND_AN)
406 && bss_desc->bcn_ht_cap)
407 && !mwifiex_is_wpa_oui_present(bss_desc,
408 CIPHER_SUITE_CCMP)) {
410 if (mwifiex_is_wpa_oui_present(bss_desc,
411 CIPHER_SUITE_TKIP)) {
412 dev_dbg(adapter->dev,
413 "info: Disable 11n if AES "
414 "is not supported by AP\n");
415 bss_desc->disable_11n = true;
421 } else if (mwifiex_is_network_compatible_for_wpa2(priv,
424 if (((priv->adapter->config_bands & BAND_GN
425 || priv->adapter->config_bands & BAND_AN)
426 && bss_desc->bcn_ht_cap)
427 && !mwifiex_is_rsn_oui_present(bss_desc,
428 CIPHER_SUITE_CCMP)) {
430 if (mwifiex_is_rsn_oui_present(bss_desc,
431 CIPHER_SUITE_TKIP)) {
432 dev_dbg(adapter->dev,
433 "info: Disable 11n if AES "
434 "is not supported by AP\n");
435 bss_desc->disable_11n = true;
441 } else if (mwifiex_is_network_compatible_for_adhoc_aes(priv,
443 /* Ad-hoc AES enabled */
445 } else if (mwifiex_is_network_compatible_for_dynamic_wep(priv,
447 /* Dynamic WEP enabled */
451 /* Security doesn't match */
452 dev_dbg(adapter->dev, "info: %s: failed: "
453 "wpa_ie=%#x wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s EncMode"
454 "=%#x privacy=%#x\n",
456 (bss_desc->bcn_wpa_ie) ?
457 (*(bss_desc->bcn_wpa_ie)).vend_hdr.
459 (bss_desc->bcn_rsn_ie) ?
460 (*(bss_desc->bcn_rsn_ie)).ieee_hdr.
462 (priv->sec_info.wep_enabled) ? "e" : "d",
463 (priv->sec_info.wpa_enabled) ? "e" : "d",
464 (priv->sec_info.wpa2_enabled) ? "e" : "d",
465 priv->sec_info.encryption_mode, bss_desc->privacy);
469 /* Mode doesn't match */
474 * This function creates a channel list for the driver to scan, based
475 * on region/band information.
477 * This routine is used for any scan that is not provided with a
478 * specific channel list to scan.
481 mwifiex_scan_create_channel_list(struct mwifiex_private *priv,
482 const struct mwifiex_user_scan_cfg
484 struct mwifiex_chan_scan_param_set
488 enum ieee80211_band band;
489 struct ieee80211_supported_band *sband;
490 struct ieee80211_channel *ch;
491 struct mwifiex_adapter *adapter = priv->adapter;
494 for (band = 0; (band < IEEE80211_NUM_BANDS) ; band++) {
496 if (!priv->wdev->wiphy->bands[band])
499 sband = priv->wdev->wiphy->bands[band];
501 for (i = 0; (i < sband->n_channels) ; i++) {
502 ch = &sband->channels[i];
503 if (ch->flags & IEEE80211_CHAN_DISABLED)
505 scan_chan_list[chan_idx].radio_type = band;
508 user_scan_in->chan_list[0].scan_time)
509 scan_chan_list[chan_idx].max_scan_time =
510 cpu_to_le16((u16) user_scan_in->
511 chan_list[0].scan_time);
512 else if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
513 scan_chan_list[chan_idx].max_scan_time =
514 cpu_to_le16(adapter->passive_scan_time);
516 scan_chan_list[chan_idx].max_scan_time =
517 cpu_to_le16(adapter->active_scan_time);
519 if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
520 scan_chan_list[chan_idx].chan_scan_mode_bitmap
521 |= MWIFIEX_PASSIVE_SCAN;
523 scan_chan_list[chan_idx].chan_scan_mode_bitmap
524 &= ~MWIFIEX_PASSIVE_SCAN;
525 scan_chan_list[chan_idx].chan_number =
528 scan_chan_list[chan_idx].max_scan_time =
529 cpu_to_le16(adapter->specific_scan_time);
530 scan_chan_list[chan_idx].chan_scan_mode_bitmap
531 |= MWIFIEX_DISABLE_CHAN_FILT;
540 * This function constructs and sends multiple scan config commands to
543 * Previous routines in the code flow have created a scan command configuration
544 * with any requested TLVs. This function splits the channel TLV into maximum
545 * channels supported per scan lists and sends the portion of the channel TLV,
546 * along with the other TLVs, to the firmware.
549 mwifiex_scan_channel_list(struct mwifiex_private *priv,
550 u32 max_chan_per_scan, u8 filtered_scan,
551 struct mwifiex_scan_cmd_config *scan_cfg_out,
552 struct mwifiex_ie_types_chan_list_param_set
554 struct mwifiex_chan_scan_param_set *scan_chan_list)
557 struct mwifiex_chan_scan_param_set *tmp_chan_list;
558 struct mwifiex_chan_scan_param_set *start_chan;
564 if (!scan_cfg_out || !chan_tlv_out || !scan_chan_list) {
565 dev_dbg(priv->adapter->dev,
566 "info: Scan: Null detect: %p, %p, %p\n",
567 scan_cfg_out, chan_tlv_out, scan_chan_list);
571 chan_tlv_out->header.type = cpu_to_le16(TLV_TYPE_CHANLIST);
573 /* Set the temp channel struct pointer to the start of the desired
575 tmp_chan_list = scan_chan_list;
577 /* Loop through the desired channel list, sending a new firmware scan
578 commands for each max_chan_per_scan channels (or for 1,6,11
579 individually if configured accordingly) */
580 while (tmp_chan_list->chan_number) {
584 chan_tlv_out->header.len = 0;
585 start_chan = tmp_chan_list;
589 * Construct the Channel TLV for the scan command. Continue to
590 * insert channel TLVs until:
591 * - the tlv_idx hits the maximum configured per scan command
592 * - the next channel to insert is 0 (end of desired channel
594 * - done_early is set (controlling individual scanning of
597 while (tlv_idx < max_chan_per_scan
598 && tmp_chan_list->chan_number && !done_early) {
600 dev_dbg(priv->adapter->dev,
601 "info: Scan: Chan(%3d), Radio(%d),"
602 " Mode(%d, %d), Dur(%d)\n",
603 tmp_chan_list->chan_number,
604 tmp_chan_list->radio_type,
605 tmp_chan_list->chan_scan_mode_bitmap
606 & MWIFIEX_PASSIVE_SCAN,
607 (tmp_chan_list->chan_scan_mode_bitmap
608 & MWIFIEX_DISABLE_CHAN_FILT) >> 1,
609 le16_to_cpu(tmp_chan_list->max_scan_time));
611 /* Copy the current channel TLV to the command being
613 memcpy(chan_tlv_out->chan_scan_param + tlv_idx,
615 sizeof(chan_tlv_out->chan_scan_param));
617 /* Increment the TLV header length by the size
619 chan_tlv_out->header.len =
620 cpu_to_le16(le16_to_cpu(chan_tlv_out->header.len) +
621 (sizeof(chan_tlv_out->chan_scan_param)));
624 * The tlv buffer length is set to the number of bytes
625 * of the between the channel tlv pointer and the start
626 * of the tlv buffer. This compensates for any TLVs
627 * that were appended before the channel list.
629 scan_cfg_out->tlv_buf_len = (u32) ((u8 *) chan_tlv_out -
630 scan_cfg_out->tlv_buf);
632 /* Add the size of the channel tlv header and the data
634 scan_cfg_out->tlv_buf_len +=
635 (sizeof(chan_tlv_out->header)
636 + le16_to_cpu(chan_tlv_out->header.len));
638 /* Increment the index to the channel tlv we are
642 /* Count the total scan time per command */
644 le16_to_cpu(tmp_chan_list->max_scan_time);
648 /* Stop the loop if the *current* channel is in the
649 1,6,11 set and we are not filtering on a BSSID
651 if (!filtered_scan && (tmp_chan_list->chan_number == 1
652 || tmp_chan_list->chan_number == 6
653 || tmp_chan_list->chan_number == 11))
656 /* Increment the tmp pointer to the next channel to
660 /* Stop the loop if the *next* channel is in the 1,6,11
661 set. This will cause it to be the only channel
662 scanned on the next interation */
663 if (!filtered_scan && (tmp_chan_list->chan_number == 1
664 || tmp_chan_list->chan_number == 6
665 || tmp_chan_list->chan_number == 11))
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_scan_setup_scan_config(struct mwifiex_private *priv,
718 const struct mwifiex_user_scan_cfg *user_scan_in,
719 struct mwifiex_scan_cmd_config *scan_cfg_out,
720 struct mwifiex_ie_types_chan_list_param_set
722 struct mwifiex_chan_scan_param_set
724 u8 *max_chan_per_scan, u8 *filtered_scan,
725 u8 *scan_current_only)
727 struct mwifiex_adapter *adapter = priv->adapter;
728 struct mwifiex_ie_types_num_probes *num_probes_tlv;
729 struct mwifiex_ie_types_wildcard_ssid_params *wildcard_ssid_tlv;
730 struct mwifiex_ie_types_rates_param_set *rates_tlv;
731 const u8 zero_mac[ETH_ALEN] = { 0, 0, 0, 0, 0, 0 };
742 u8 rates[MWIFIEX_SUPPORTED_RATES];
744 struct mwifiex_ie_types_htcap *ht_cap;
746 /* The tlv_buf_len is calculated for each scan command. The TLVs added
747 in this routine will be preserved since the routine that sends the
748 command will append channelTLVs at *chan_list_out. The difference
749 between the *chan_list_out and the tlv_buf start will be used to
750 calculate the size of anything we add in this routine. */
751 scan_cfg_out->tlv_buf_len = 0;
753 /* Running tlv pointer. Assigned to chan_list_out at end of function
754 so later routines know where channels can be added to the command
756 tlv_pos = scan_cfg_out->tlv_buf;
758 /* Initialize the scan as un-filtered; the flag is later set to TRUE
759 below if a SSID or BSSID filter is sent in the command */
760 *filtered_scan = false;
762 /* Initialize the scan as not being only on the current channel. If
763 the channel list is customized, only contains one channel, and is
764 the active channel, this is set true and data flow is not halted. */
765 *scan_current_only = false;
769 /* Default the ssid_filter flag to TRUE, set false under
770 certain wildcard conditions and qualified by the existence
771 of an SSID list before marking the scan as filtered */
774 /* Set the BSS type scan filter, use Adapter setting if
776 scan_cfg_out->bss_mode =
777 (user_scan_in->bss_mode ? (u8) user_scan_in->
778 bss_mode : (u8) adapter->scan_mode);
780 /* Set the number of probes to send, use Adapter setting
783 (user_scan_in->num_probes ? user_scan_in->
784 num_probes : adapter->scan_probes);
787 * Set the BSSID filter to the incoming configuration,
788 * if non-zero. If not set, it will remain disabled
791 memcpy(scan_cfg_out->specific_bssid,
792 user_scan_in->specific_bssid,
793 sizeof(scan_cfg_out->specific_bssid));
796 ((ssid_idx < ARRAY_SIZE(user_scan_in->ssid_list))
797 && (*user_scan_in->ssid_list[ssid_idx].ssid
798 || user_scan_in->ssid_list[ssid_idx].max_len));
801 ssid_len = strlen(user_scan_in->ssid_list[ssid_idx].
805 (struct mwifiex_ie_types_wildcard_ssid_params *)
807 wildcard_ssid_tlv->header.type =
808 cpu_to_le16(TLV_TYPE_WILDCARDSSID);
809 wildcard_ssid_tlv->header.len = cpu_to_le16(
810 (u16) (ssid_len + sizeof(wildcard_ssid_tlv->
813 /* max_ssid_length = 0 tells firmware to perform
814 specific scan for the SSID filled */
815 wildcard_ssid_tlv->max_ssid_length = 0;
817 memcpy(wildcard_ssid_tlv->ssid,
818 user_scan_in->ssid_list[ssid_idx].ssid,
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_list[%d]: %s, %d\n",
825 ssid_idx, 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)
838 * The default number of channels sent in the command is low to
839 * ensure the response buffer from the firmware does not
840 * truncate scan results. That is not an issue with an SSID
841 * or BSSID filter applied to the scan results in the firmware.
843 if ((ssid_idx && ssid_filter)
844 || memcmp(scan_cfg_out->specific_bssid, &zero_mac,
846 *filtered_scan = true;
848 scan_cfg_out->bss_mode = (u8) adapter->scan_mode;
849 num_probes = adapter->scan_probes;
853 * If a specific BSSID or SSID is used, the number of channels in the
854 * scan command will be increased to the absolute maximum.
857 *max_chan_per_scan = MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN;
859 *max_chan_per_scan = MWIFIEX_CHANNELS_PER_SCAN_CMD;
861 /* If the input config or adapter has the number of Probes set,
865 dev_dbg(adapter->dev, "info: scan: num_probes = %d\n",
868 num_probes_tlv = (struct mwifiex_ie_types_num_probes *) tlv_pos;
869 num_probes_tlv->header.type = cpu_to_le16(TLV_TYPE_NUMPROBES);
870 num_probes_tlv->header.len =
871 cpu_to_le16(sizeof(num_probes_tlv->num_probes));
872 num_probes_tlv->num_probes = cpu_to_le16((u16) num_probes);
874 tlv_pos += sizeof(num_probes_tlv->header) +
875 le16_to_cpu(num_probes_tlv->header.len);
879 /* Append rates tlv */
880 memset(rates, 0, sizeof(rates));
882 rates_size = mwifiex_get_supported_rates(priv, rates);
884 rates_tlv = (struct mwifiex_ie_types_rates_param_set *) tlv_pos;
885 rates_tlv->header.type = cpu_to_le16(WLAN_EID_SUPP_RATES);
886 rates_tlv->header.len = cpu_to_le16((u16) rates_size);
887 memcpy(rates_tlv->rates, rates, rates_size);
888 tlv_pos += sizeof(rates_tlv->header) + rates_size;
890 dev_dbg(adapter->dev, "info: SCAN_CMD: Rates size = %d\n", rates_size);
892 if (ISSUPP_11NENABLED(priv->adapter->fw_cap_info)
893 && (priv->adapter->config_bands & BAND_GN
894 || priv->adapter->config_bands & BAND_AN)) {
895 ht_cap = (struct mwifiex_ie_types_htcap *) tlv_pos;
896 memset(ht_cap, 0, sizeof(struct mwifiex_ie_types_htcap));
897 ht_cap->header.type = cpu_to_le16(WLAN_EID_HT_CAPABILITY);
899 cpu_to_le16(sizeof(struct ieee80211_ht_cap));
901 mwifiex_band_to_radio_type(priv->adapter->config_bands);
902 mwifiex_fill_cap_info(priv, radio_type, ht_cap);
903 tlv_pos += sizeof(struct mwifiex_ie_types_htcap);
906 /* Append vendor specific IE TLV */
907 mwifiex_cmd_append_vsie_tlv(priv, MWIFIEX_VSIE_MASK_SCAN, &tlv_pos);
910 * Set the output for the channel TLV to the address in the tlv buffer
911 * past any TLVs that were added in this function (SSID, num_probes).
912 * Channel TLVs will be added past this for each scan command,
913 * preserving the TLVs that were previously added.
916 (struct mwifiex_ie_types_chan_list_param_set *) tlv_pos;
918 if (user_scan_in && user_scan_in->chan_list[0].chan_number) {
920 dev_dbg(adapter->dev, "info: Scan: Using supplied channel list\n");
923 chan_idx < MWIFIEX_USER_SCAN_CHAN_MAX
924 && user_scan_in->chan_list[chan_idx].chan_number;
927 channel = user_scan_in->chan_list[chan_idx].chan_number;
928 (scan_chan_list + chan_idx)->chan_number = channel;
931 user_scan_in->chan_list[chan_idx].radio_type;
932 (scan_chan_list + chan_idx)->radio_type = radio_type;
934 scan_type = user_scan_in->chan_list[chan_idx].scan_type;
936 if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE)
938 chan_idx)->chan_scan_mode_bitmap
939 |= MWIFIEX_PASSIVE_SCAN;
942 chan_idx)->chan_scan_mode_bitmap
943 &= ~MWIFIEX_PASSIVE_SCAN;
945 if (user_scan_in->chan_list[chan_idx].scan_time) {
946 scan_dur = (u16) user_scan_in->
947 chan_list[chan_idx].scan_time;
949 if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE)
950 scan_dur = adapter->passive_scan_time;
951 else if (*filtered_scan)
952 scan_dur = adapter->specific_scan_time;
954 scan_dur = adapter->active_scan_time;
957 (scan_chan_list + chan_idx)->min_scan_time =
958 cpu_to_le16(scan_dur);
959 (scan_chan_list + chan_idx)->max_scan_time =
960 cpu_to_le16(scan_dur);
963 /* Check if we are only scanning the current channel */
965 && (user_scan_in->chan_list[0].chan_number
966 == priv->curr_bss_params.bss_descriptor.channel)) {
967 *scan_current_only = true;
968 dev_dbg(adapter->dev,
969 "info: Scan: Scanning current channel only\n");
973 dev_dbg(adapter->dev,
974 "info: Scan: Creating full region channel list\n");
975 mwifiex_scan_create_channel_list(priv, user_scan_in,
982 * This function inspects the scan response buffer for pointers to
985 * TLVs can be included at the end of the scan response BSS information.
987 * Data in the buffer is parsed pointers to TLVs that can potentially
988 * be passed back in the response.
991 mwifiex_ret_802_11_scan_get_tlv_ptrs(struct mwifiex_adapter *adapter,
992 struct mwifiex_ie_types_data *tlv,
993 u32 tlv_buf_size, u32 req_tlv_type,
994 struct mwifiex_ie_types_data **tlv_data)
996 struct mwifiex_ie_types_data *current_tlv;
1002 tlv_buf_left = tlv_buf_size;
1005 dev_dbg(adapter->dev, "info: SCAN_RESP: tlv_buf_size = %d\n",
1008 while (tlv_buf_left >= sizeof(struct mwifiex_ie_types_header)) {
1010 tlv_type = le16_to_cpu(current_tlv->header.type);
1011 tlv_len = le16_to_cpu(current_tlv->header.len);
1013 if (sizeof(tlv->header) + tlv_len > tlv_buf_left) {
1014 dev_err(adapter->dev, "SCAN_RESP: TLV buffer corrupt\n");
1018 if (req_tlv_type == tlv_type) {
1020 case TLV_TYPE_TSFTIMESTAMP:
1021 dev_dbg(adapter->dev, "info: SCAN_RESP: TSF "
1022 "timestamp TLV, len = %d\n", tlv_len);
1023 *tlv_data = (struct mwifiex_ie_types_data *)
1026 case TLV_TYPE_CHANNELBANDLIST:
1027 dev_dbg(adapter->dev, "info: SCAN_RESP: channel"
1028 " band list TLV, len = %d\n", tlv_len);
1029 *tlv_data = (struct mwifiex_ie_types_data *)
1033 dev_err(adapter->dev,
1034 "SCAN_RESP: unhandled TLV = %d\n",
1036 /* Give up, this seems corrupted */
1045 tlv_buf_left -= (sizeof(tlv->header) + tlv_len);
1047 (struct mwifiex_ie_types_data *) (current_tlv->data +
1054 * This function parses provided beacon buffer and updates
1055 * respective fields in bss descriptor structure.
1058 mwifiex_update_bss_desc_with_ie(struct mwifiex_adapter *adapter,
1059 struct mwifiex_bssdescriptor *bss_entry,
1060 u8 *ie_buf, u32 ie_len)
1064 struct ieee_types_fh_param_set *fh_param_set;
1065 struct ieee_types_ds_param_set *ds_param_set;
1066 struct ieee_types_cf_param_set *cf_param_set;
1067 struct ieee_types_ibss_param_set *ibss_param_set;
1074 u8 found_data_rate_ie;
1076 struct ieee_types_vendor_specific *vendor_ie;
1077 const u8 wpa_oui[4] = { 0x00, 0x50, 0xf2, 0x01 };
1078 const u8 wmm_oui[4] = { 0x00, 0x50, 0xf2, 0x02 };
1080 found_data_rate_ie = false;
1082 current_ptr = ie_buf;
1083 bytes_left = ie_len;
1084 bss_entry->beacon_buf = ie_buf;
1085 bss_entry->beacon_buf_size = ie_len;
1087 /* Process variable IE */
1088 while (bytes_left >= 2) {
1089 element_id = *current_ptr;
1090 element_len = *(current_ptr + 1);
1091 total_ie_len = element_len + sizeof(struct ieee_types_header);
1093 if (bytes_left < total_ie_len) {
1094 dev_err(adapter->dev, "err: InterpretIE: in processing"
1095 " IE, bytes left < IE length\n");
1098 switch (element_id) {
1100 bss_entry->ssid.ssid_len = element_len;
1101 memcpy(bss_entry->ssid.ssid, (current_ptr + 2),
1103 dev_dbg(adapter->dev, "info: InterpretIE: ssid: "
1104 "%-32s\n", bss_entry->ssid.ssid);
1107 case WLAN_EID_SUPP_RATES:
1108 memcpy(bss_entry->data_rates, current_ptr + 2,
1110 memcpy(bss_entry->supported_rates, current_ptr + 2,
1112 rate_size = element_len;
1113 found_data_rate_ie = true;
1116 case WLAN_EID_FH_PARAMS:
1118 (struct ieee_types_fh_param_set *) current_ptr;
1119 memcpy(&bss_entry->phy_param_set.fh_param_set,
1121 sizeof(struct ieee_types_fh_param_set));
1124 case WLAN_EID_DS_PARAMS:
1126 (struct ieee_types_ds_param_set *) current_ptr;
1128 bss_entry->channel = ds_param_set->current_chan;
1130 memcpy(&bss_entry->phy_param_set.ds_param_set,
1132 sizeof(struct ieee_types_ds_param_set));
1135 case WLAN_EID_CF_PARAMS:
1137 (struct ieee_types_cf_param_set *) current_ptr;
1138 memcpy(&bss_entry->ss_param_set.cf_param_set,
1140 sizeof(struct ieee_types_cf_param_set));
1143 case WLAN_EID_IBSS_PARAMS:
1145 (struct ieee_types_ibss_param_set *)
1147 memcpy(&bss_entry->ss_param_set.ibss_param_set,
1149 sizeof(struct ieee_types_ibss_param_set));
1152 case WLAN_EID_ERP_INFO:
1153 bss_entry->erp_flags = *(current_ptr + 2);
1156 case WLAN_EID_EXT_SUPP_RATES:
1158 * Only process extended supported rate
1159 * if data rate is already found.
1160 * Data rate IE should come before
1161 * extended supported rate IE
1163 if (found_data_rate_ie) {
1164 if ((element_len + rate_size) >
1165 MWIFIEX_SUPPORTED_RATES)
1167 (MWIFIEX_SUPPORTED_RATES -
1170 bytes_to_copy = element_len;
1172 rate = (u8 *) bss_entry->data_rates;
1174 memcpy(rate, current_ptr + 2, bytes_to_copy);
1176 rate = (u8 *) bss_entry->supported_rates;
1178 memcpy(rate, current_ptr + 2, bytes_to_copy);
1182 case WLAN_EID_VENDOR_SPECIFIC:
1183 vendor_ie = (struct ieee_types_vendor_specific *)
1187 (vendor_ie->vend_hdr.oui, wpa_oui,
1189 bss_entry->bcn_wpa_ie =
1190 (struct ieee_types_vendor_specific *)
1192 bss_entry->wpa_offset = (u16) (current_ptr -
1193 bss_entry->beacon_buf);
1194 } else if (!memcmp(vendor_ie->vend_hdr.oui, wmm_oui,
1197 sizeof(struct ieee_types_wmm_parameter)
1199 sizeof(struct ieee_types_wmm_info))
1201 * Only accept and copy the WMM IE if
1202 * it matches the size expected for the
1203 * WMM Info IE or the WMM Parameter IE.
1205 memcpy((u8 *) &bss_entry->wmm_ie,
1206 current_ptr, total_ie_len);
1210 bss_entry->bcn_rsn_ie =
1211 (struct ieee_types_generic *) current_ptr;
1212 bss_entry->rsn_offset = (u16) (current_ptr -
1213 bss_entry->beacon_buf);
1215 case WLAN_EID_BSS_AC_ACCESS_DELAY:
1216 bss_entry->bcn_wapi_ie =
1217 (struct ieee_types_generic *) current_ptr;
1218 bss_entry->wapi_offset = (u16) (current_ptr -
1219 bss_entry->beacon_buf);
1221 case WLAN_EID_HT_CAPABILITY:
1222 bss_entry->bcn_ht_cap = (struct ieee80211_ht_cap *)
1224 sizeof(struct ieee_types_header));
1225 bss_entry->ht_cap_offset = (u16) (current_ptr +
1226 sizeof(struct ieee_types_header) -
1227 bss_entry->beacon_buf);
1229 case WLAN_EID_HT_INFORMATION:
1230 bss_entry->bcn_ht_info = (struct ieee80211_ht_info *)
1232 sizeof(struct ieee_types_header));
1233 bss_entry->ht_info_offset = (u16) (current_ptr +
1234 sizeof(struct ieee_types_header) -
1235 bss_entry->beacon_buf);
1237 case WLAN_EID_BSS_COEX_2040:
1238 bss_entry->bcn_bss_co_2040 = (u8 *) (current_ptr +
1239 sizeof(struct ieee_types_header));
1240 bss_entry->bss_co_2040_offset = (u16) (current_ptr +
1241 sizeof(struct ieee_types_header) -
1242 bss_entry->beacon_buf);
1244 case WLAN_EID_EXT_CAPABILITY:
1245 bss_entry->bcn_ext_cap = (u8 *) (current_ptr +
1246 sizeof(struct ieee_types_header));
1247 bss_entry->ext_cap_offset = (u16) (current_ptr +
1248 sizeof(struct ieee_types_header) -
1249 bss_entry->beacon_buf);
1255 current_ptr += element_len + 2;
1257 /* Need to account for IE ID and IE Len */
1258 bytes_left -= (element_len + 2);
1260 } /* while (bytes_left > 2) */
1265 * This function converts radio type scan parameter to a band configuration
1266 * to be used in join command.
1269 mwifiex_radio_type_to_band(u8 radio_type)
1271 switch (radio_type) {
1272 case HostCmd_SCAN_RADIO_TYPE_A:
1274 case HostCmd_SCAN_RADIO_TYPE_BG:
1281 * This is an internal function used to start a scan based on an input
1284 * This uses the input user scan configuration information when provided in
1285 * order to send the appropriate scan commands to firmware to populate or
1286 * update the internal driver scan table.
1288 static int mwifiex_scan_networks(struct mwifiex_private *priv,
1289 const struct mwifiex_user_scan_cfg *user_scan_in)
1292 struct mwifiex_adapter *adapter = priv->adapter;
1293 struct cmd_ctrl_node *cmd_node;
1294 union mwifiex_scan_cmd_config_tlv *scan_cfg_out;
1295 struct mwifiex_ie_types_chan_list_param_set *chan_list_out;
1297 struct mwifiex_chan_scan_param_set *scan_chan_list;
1299 u8 scan_current_chan_only;
1300 u8 max_chan_per_scan;
1301 unsigned long flags;
1303 if (adapter->scan_processing) {
1304 dev_dbg(adapter->dev, "cmd: Scan already in process...\n");
1308 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
1309 adapter->scan_processing = true;
1310 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
1312 if (priv->scan_block) {
1313 dev_dbg(adapter->dev,
1314 "cmd: Scan is blocked during association...\n");
1318 scan_cfg_out = kzalloc(sizeof(union mwifiex_scan_cmd_config_tlv),
1320 if (!scan_cfg_out) {
1321 dev_err(adapter->dev, "failed to alloc scan_cfg_out\n");
1325 buf_size = sizeof(struct mwifiex_chan_scan_param_set) *
1326 MWIFIEX_USER_SCAN_CHAN_MAX;
1327 scan_chan_list = kzalloc(buf_size, GFP_KERNEL);
1328 if (!scan_chan_list) {
1329 dev_err(adapter->dev, "failed to alloc scan_chan_list\n");
1330 kfree(scan_cfg_out);
1334 mwifiex_scan_setup_scan_config(priv, user_scan_in,
1335 &scan_cfg_out->config, &chan_list_out,
1336 scan_chan_list, &max_chan_per_scan,
1337 &filtered_scan, &scan_current_chan_only);
1339 ret = mwifiex_scan_channel_list(priv, max_chan_per_scan, filtered_scan,
1340 &scan_cfg_out->config, chan_list_out,
1343 /* Get scan command from scan_pending_q and put to cmd_pending_q */
1345 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
1346 if (!list_empty(&adapter->scan_pending_q)) {
1347 cmd_node = list_first_entry(&adapter->scan_pending_q,
1348 struct cmd_ctrl_node, list);
1349 list_del(&cmd_node->list);
1350 spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
1352 adapter->cmd_queued = cmd_node;
1353 mwifiex_insert_cmd_to_pending_q(adapter, cmd_node,
1356 spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
1360 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
1361 adapter->scan_processing = true;
1362 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
1365 kfree(scan_cfg_out);
1366 kfree(scan_chan_list);
1371 * Sends IOCTL request to start a scan with user configurations.
1373 * This function allocates the IOCTL request buffer, fills it
1374 * with requisite parameters and calls the IOCTL handler.
1376 * Upon completion, it also generates a wireless event to notify
1379 int mwifiex_set_user_scan_ioctl(struct mwifiex_private *priv,
1380 struct mwifiex_user_scan_cfg *scan_req)
1384 status = mwifiex_scan_networks(priv, scan_req);
1385 queue_work(priv->adapter->workqueue, &priv->adapter->main_work);
1391 * This function prepares a scan command to be sent to the firmware.
1393 * This uses the scan command configuration sent to the command processing
1394 * module in command preparation stage to configure a scan command structure
1395 * to send to firmware.
1397 * The fixed fields specifying the BSS type and BSSID filters as well as a
1398 * variable number/length of TLVs are sent in the command to firmware.
1400 * Preparation also includes -
1401 * - Setting command ID, and proper size
1402 * - Ensuring correct endian-ness
1404 int mwifiex_cmd_802_11_scan(struct host_cmd_ds_command *cmd,
1405 struct mwifiex_scan_cmd_config *scan_cfg)
1407 struct host_cmd_ds_802_11_scan *scan_cmd = &cmd->params.scan;
1409 /* Set fixed field variables in scan command */
1410 scan_cmd->bss_mode = scan_cfg->bss_mode;
1411 memcpy(scan_cmd->bssid, scan_cfg->specific_bssid,
1412 sizeof(scan_cmd->bssid));
1413 memcpy(scan_cmd->tlv_buffer, scan_cfg->tlv_buf, scan_cfg->tlv_buf_len);
1415 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_SCAN);
1417 /* Size is equal to the sizeof(fixed portions) + the TLV len + header */
1418 cmd->size = cpu_to_le16((u16) (sizeof(scan_cmd->bss_mode)
1419 + sizeof(scan_cmd->bssid)
1420 + scan_cfg->tlv_buf_len + S_DS_GEN));
1426 * This function checks compatibility of requested network with current
1429 int mwifiex_check_network_compatibility(struct mwifiex_private *priv,
1430 struct mwifiex_bssdescriptor *bss_desc)
1437 if ((mwifiex_get_cfp_by_band_and_channel_from_cfg80211(priv,
1438 (u8) bss_desc->bss_band, (u16) bss_desc->channel))) {
1439 switch (priv->bss_mode) {
1440 case NL80211_IFTYPE_STATION:
1441 case NL80211_IFTYPE_ADHOC:
1442 ret = mwifiex_is_network_compatible(priv, bss_desc,
1445 dev_err(priv->adapter->dev, "cannot find ssid "
1446 "%s\n", bss_desc->ssid.ssid);
1457 mwifiex_update_curr_bss_params(struct mwifiex_private *priv, u8 *bssid,
1458 s32 rssi, const u8 *ie_buf, size_t ie_len,
1459 u16 beacon_period, u16 cap_info_bitmap, u8 band)
1461 struct mwifiex_bssdescriptor *bss_desc;
1463 unsigned long flags;
1466 /* Allocate and fill new bss descriptor */
1467 bss_desc = kzalloc(sizeof(struct mwifiex_bssdescriptor),
1470 dev_err(priv->adapter->dev, " failed to alloc bss_desc\n");
1474 beacon_ie = kmemdup(ie_buf, ie_len, GFP_KERNEL);
1477 dev_err(priv->adapter->dev, " failed to alloc beacon_ie\n");
1481 ret = mwifiex_fill_new_bss_desc(priv, bssid, rssi, beacon_ie,
1482 ie_len, beacon_period,
1483 cap_info_bitmap, band, bss_desc);
1487 ret = mwifiex_check_network_compatibility(priv, bss_desc);
1491 /* Update current bss descriptor parameters */
1492 spin_lock_irqsave(&priv->curr_bcn_buf_lock, flags);
1493 priv->curr_bss_params.bss_descriptor.bcn_wpa_ie = NULL;
1494 priv->curr_bss_params.bss_descriptor.wpa_offset = 0;
1495 priv->curr_bss_params.bss_descriptor.bcn_rsn_ie = NULL;
1496 priv->curr_bss_params.bss_descriptor.rsn_offset = 0;
1497 priv->curr_bss_params.bss_descriptor.bcn_wapi_ie = NULL;
1498 priv->curr_bss_params.bss_descriptor.wapi_offset = 0;
1499 priv->curr_bss_params.bss_descriptor.bcn_ht_cap = NULL;
1500 priv->curr_bss_params.bss_descriptor.ht_cap_offset =
1502 priv->curr_bss_params.bss_descriptor.bcn_ht_info = NULL;
1503 priv->curr_bss_params.bss_descriptor.ht_info_offset =
1505 priv->curr_bss_params.bss_descriptor.bcn_bss_co_2040 =
1507 priv->curr_bss_params.bss_descriptor.
1508 bss_co_2040_offset = 0;
1509 priv->curr_bss_params.bss_descriptor.bcn_ext_cap = NULL;
1510 priv->curr_bss_params.bss_descriptor.ext_cap_offset = 0;
1511 priv->curr_bss_params.bss_descriptor.beacon_buf = NULL;
1512 priv->curr_bss_params.bss_descriptor.beacon_buf_size =
1515 /* Make a copy of current BSSID descriptor */
1516 memcpy(&priv->curr_bss_params.bss_descriptor, bss_desc,
1517 sizeof(priv->curr_bss_params.bss_descriptor));
1518 mwifiex_save_curr_bcn(priv);
1519 spin_unlock_irqrestore(&priv->curr_bcn_buf_lock, flags);
1528 * This function handles the command response of scan.
1530 * The response buffer for the scan command has the following
1533 * .-------------------------------------------------------------.
1534 * | Header (4 * sizeof(t_u16)): Standard command response hdr |
1535 * .-------------------------------------------------------------.
1536 * | BufSize (t_u16) : sizeof the BSS Description data |
1537 * .-------------------------------------------------------------.
1538 * | NumOfSet (t_u8) : Number of BSS Descs returned |
1539 * .-------------------------------------------------------------.
1540 * | BSSDescription data (variable, size given in BufSize) |
1541 * .-------------------------------------------------------------.
1542 * | TLV data (variable, size calculated using Header->Size, |
1543 * | BufSize and sizeof the fixed fields above) |
1544 * .-------------------------------------------------------------.
1546 int mwifiex_ret_802_11_scan(struct mwifiex_private *priv,
1547 struct host_cmd_ds_command *resp)
1550 struct mwifiex_adapter *adapter = priv->adapter;
1551 struct cmd_ctrl_node *cmd_node;
1552 struct host_cmd_ds_802_11_scan_rsp *scan_rsp;
1553 struct mwifiex_ie_types_data *tlv_data;
1554 struct mwifiex_ie_types_tsf_timestamp *tsf_tlv;
1560 struct mwifiex_chan_freq_power *cfp;
1561 struct mwifiex_ie_types_chan_band_list_param_set *chan_band_tlv;
1562 struct chan_band_param_set *chan_band;
1564 unsigned long flags;
1565 struct cfg80211_bss *bss;
1567 is_bgscan_resp = (le16_to_cpu(resp->command)
1568 == HostCmd_CMD_802_11_BG_SCAN_QUERY);
1570 scan_rsp = &resp->params.bg_scan_query_resp.scan_resp;
1572 scan_rsp = &resp->params.scan_resp;
1575 if (scan_rsp->number_of_sets > MWIFIEX_MAX_AP) {
1576 dev_err(adapter->dev, "SCAN_RESP: too many AP returned (%d)\n",
1577 scan_rsp->number_of_sets);
1582 bytes_left = le16_to_cpu(scan_rsp->bss_descript_size);
1583 dev_dbg(adapter->dev, "info: SCAN_RESP: bss_descript_size %d\n",
1586 scan_resp_size = le16_to_cpu(resp->size);
1588 dev_dbg(adapter->dev,
1589 "info: SCAN_RESP: returned %d APs before parsing\n",
1590 scan_rsp->number_of_sets);
1592 bss_info = scan_rsp->bss_desc_and_tlv_buffer;
1595 * The size of the TLV buffer is equal to the entire command response
1596 * size (scan_resp_size) minus the fixed fields (sizeof()'s), the
1597 * BSS Descriptions (bss_descript_size as bytesLef) and the command
1598 * response header (S_DS_GEN)
1600 tlv_buf_size = scan_resp_size - (bytes_left
1601 + sizeof(scan_rsp->bss_descript_size)
1602 + sizeof(scan_rsp->number_of_sets)
1605 tlv_data = (struct mwifiex_ie_types_data *) (scan_rsp->
1606 bss_desc_and_tlv_buffer +
1609 /* Search the TLV buffer space in the scan response for any valid
1611 mwifiex_ret_802_11_scan_get_tlv_ptrs(adapter, tlv_data, tlv_buf_size,
1612 TLV_TYPE_TSFTIMESTAMP,
1613 (struct mwifiex_ie_types_data **)
1616 /* Search the TLV buffer space in the scan response for any valid
1618 mwifiex_ret_802_11_scan_get_tlv_ptrs(adapter, tlv_data, tlv_buf_size,
1619 TLV_TYPE_CHANNELBANDLIST,
1620 (struct mwifiex_ie_types_data **)
1623 for (idx = 0; idx < scan_rsp->number_of_sets && bytes_left; idx++) {
1629 u64 network_tsf = 0;
1630 u16 beacon_size = 0;
1634 u16 cap_info_bitmap;
1636 struct mwifiex_bcn_param *bcn_param;
1638 if (bytes_left >= sizeof(beacon_size)) {
1639 /* Extract & convert beacon size from command buffer */
1640 memcpy(&beacon_size, bss_info, sizeof(beacon_size));
1641 bytes_left -= sizeof(beacon_size);
1642 bss_info += sizeof(beacon_size);
1645 if (!beacon_size || beacon_size > bytes_left) {
1646 bss_info += bytes_left;
1651 /* Initialize the current working beacon pointer for this BSS
1653 current_ptr = bss_info;
1655 /* Advance the return beacon pointer past the current beacon */
1656 bss_info += beacon_size;
1657 bytes_left -= beacon_size;
1659 curr_bcn_bytes = beacon_size;
1662 * First 5 fields are bssid, RSSI, time stamp, beacon interval,
1663 * and capability information
1665 if (curr_bcn_bytes < sizeof(struct mwifiex_bcn_param)) {
1666 dev_err(adapter->dev, "InterpretIE: not enough bytes left\n");
1669 bcn_param = (struct mwifiex_bcn_param *)current_ptr;
1670 current_ptr += sizeof(*bcn_param);
1671 curr_bcn_bytes -= sizeof(*bcn_param);
1673 memcpy(bssid, bcn_param->bssid, ETH_ALEN);
1675 rssi = (s32) (bcn_param->rssi);
1676 dev_dbg(adapter->dev, "info: InterpretIE: RSSI=%02X\n",
1679 beacon_period = le16_to_cpu(bcn_param->beacon_period);
1681 cap_info_bitmap = le16_to_cpu(bcn_param->cap_info_bitmap);
1682 dev_dbg(adapter->dev, "info: InterpretIE: capabilities=0x%X\n",
1685 /* Rest of the current buffer are IE's */
1686 ie_buf = current_ptr;
1687 ie_len = curr_bcn_bytes;
1688 dev_dbg(adapter->dev, "info: InterpretIE: IELength for this AP"
1689 " = %d\n", curr_bcn_bytes);
1691 while (curr_bcn_bytes >= sizeof(struct ieee_types_header)) {
1692 u8 element_id, element_len;
1694 element_id = *current_ptr;
1695 element_len = *(current_ptr + 1);
1696 if (curr_bcn_bytes < element_len +
1697 sizeof(struct ieee_types_header)) {
1698 dev_err(priv->adapter->dev, "%s: in processing"
1699 " IE, bytes left < IE length\n",
1703 if (element_id == WLAN_EID_DS_PARAMS) {
1704 channel = *(u8 *) (current_ptr +
1705 sizeof(struct ieee_types_header));
1709 current_ptr += element_len +
1710 sizeof(struct ieee_types_header);
1711 curr_bcn_bytes -= element_len +
1712 sizeof(struct ieee_types_header);
1716 * If the TSF TLV was appended to the scan results, save this
1717 * entry's TSF value in the networkTSF field.The networkTSF is
1718 * the firmware's TSF value at the time the beacon or probe
1719 * response was received.
1722 memcpy(&network_tsf,
1723 &tsf_tlv->tsf_data[idx * TSF_DATA_SIZE],
1724 sizeof(network_tsf));
1726 if (channel != -1) {
1727 struct ieee80211_channel *chan;
1731 if (chan_band_tlv) {
1733 &chan_band_tlv->chan_band_param[idx];
1734 band = mwifiex_radio_type_to_band(
1735 chan_band->radio_type
1736 & (BIT(0) | BIT(1)));
1739 cfp = mwifiex_get_cfp_by_band_and_channel_from_cfg80211(
1740 priv, (u8)band, (u16)channel);
1742 freq = cfp ? cfp->freq : 0;
1744 chan = ieee80211_get_channel(priv->wdev->wiphy, freq);
1746 if (chan && !(chan->flags & IEEE80211_CHAN_DISABLED)) {
1747 bss = cfg80211_inform_bss(priv->wdev->wiphy,
1748 chan, bssid, network_tsf,
1749 cap_info_bitmap, beacon_period,
1750 ie_buf, ie_len, rssi, GFP_KERNEL);
1751 *(u8 *)bss->priv = band;
1752 cfg80211_put_bss(bss);
1754 if (priv->media_connected && !memcmp(bssid,
1755 priv->curr_bss_params.bss_descriptor
1756 .mac_address, ETH_ALEN))
1757 mwifiex_update_curr_bss_params(priv,
1758 bssid, rssi, ie_buf,
1759 ie_len, beacon_period,
1760 cap_info_bitmap, band);
1763 dev_dbg(adapter->dev, "missing BSS channel IE\n");
1767 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
1768 if (list_empty(&adapter->scan_pending_q)) {
1769 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
1770 spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
1771 adapter->scan_processing = false;
1772 spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
1774 /* Need to indicate IOCTL complete */
1775 if (adapter->curr_cmd->wait_q_enabled) {
1776 adapter->cmd_wait_q.status = 0;
1777 mwifiex_complete_cmd(adapter, adapter->curr_cmd);
1779 if (priv->report_scan_result)
1780 priv->report_scan_result = false;
1781 if (priv->scan_pending_on_block) {
1782 priv->scan_pending_on_block = false;
1783 up(&priv->async_sem);
1786 if (priv->user_scan_cfg) {
1787 dev_dbg(priv->adapter->dev, "info: %s: sending scan "
1788 "results\n", __func__);
1789 cfg80211_scan_done(priv->scan_request, 0);
1790 priv->scan_request = NULL;
1791 kfree(priv->user_scan_cfg);
1792 priv->user_scan_cfg = NULL;
1795 /* Get scan command from scan_pending_q and put to
1797 cmd_node = list_first_entry(&adapter->scan_pending_q,
1798 struct cmd_ctrl_node, list);
1799 list_del(&cmd_node->list);
1800 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
1802 mwifiex_insert_cmd_to_pending_q(adapter, cmd_node, true);
1810 * This function prepares command for background scan query.
1812 * Preparation includes -
1813 * - Setting command ID and proper size
1814 * - Setting background scan flush parameter
1815 * - Ensuring correct endian-ness
1817 int mwifiex_cmd_802_11_bg_scan_query(struct host_cmd_ds_command *cmd)
1819 struct host_cmd_ds_802_11_bg_scan_query *bg_query =
1820 &cmd->params.bg_scan_query;
1822 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_BG_SCAN_QUERY);
1823 cmd->size = cpu_to_le16(sizeof(struct host_cmd_ds_802_11_bg_scan_query)
1826 bg_query->flush = 1;
1832 * This function inserts scan command node to the scan pending queue.
1835 mwifiex_queue_scan_cmd(struct mwifiex_private *priv,
1836 struct cmd_ctrl_node *cmd_node)
1838 struct mwifiex_adapter *adapter = priv->adapter;
1839 unsigned long flags;
1841 cmd_node->wait_q_enabled = true;
1842 cmd_node->condition = &adapter->scan_wait_q_woken;
1843 spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
1844 list_add_tail(&cmd_node->list, &adapter->scan_pending_q);
1845 spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
1849 * This function sends a scan command for all available channels to the
1850 * firmware, filtered on a specific SSID.
1852 static int mwifiex_scan_specific_ssid(struct mwifiex_private *priv,
1853 struct cfg80211_ssid *req_ssid)
1855 struct mwifiex_adapter *adapter = priv->adapter;
1857 struct mwifiex_user_scan_cfg *scan_cfg;
1862 if (adapter->scan_processing) {
1863 dev_dbg(adapter->dev, "cmd: Scan already in process...\n");
1867 if (priv->scan_block) {
1868 dev_dbg(adapter->dev,
1869 "cmd: Scan is blocked during association...\n");
1873 scan_cfg = kzalloc(sizeof(struct mwifiex_user_scan_cfg), GFP_KERNEL);
1875 dev_err(adapter->dev, "failed to alloc scan_cfg\n");
1879 memcpy(scan_cfg->ssid_list[0].ssid, req_ssid->ssid,
1880 req_ssid->ssid_len);
1882 ret = mwifiex_scan_networks(priv, scan_cfg);
1889 * Sends IOCTL request to start a scan.
1891 * This function allocates the IOCTL request buffer, fills it
1892 * with requisite parameters and calls the IOCTL handler.
1894 * Scan command can be issued for both normal scan and specific SSID
1895 * scan, depending upon whether an SSID is provided or not.
1897 int mwifiex_request_scan(struct mwifiex_private *priv,
1898 struct cfg80211_ssid *req_ssid)
1902 if (down_interruptible(&priv->async_sem)) {
1903 dev_err(priv->adapter->dev, "%s: acquire semaphore\n",
1907 priv->scan_pending_on_block = true;
1909 priv->adapter->scan_wait_q_woken = false;
1911 if (req_ssid && req_ssid->ssid_len != 0)
1912 /* Specific SSID scan */
1913 ret = mwifiex_scan_specific_ssid(priv, req_ssid);
1916 ret = mwifiex_scan_networks(priv, NULL);
1919 ret = mwifiex_wait_queue_complete(priv->adapter);
1922 priv->scan_pending_on_block = false;
1923 up(&priv->async_sem);
1930 * This function appends the vendor specific IE TLV to a buffer.
1933 mwifiex_cmd_append_vsie_tlv(struct mwifiex_private *priv,
1934 u16 vsie_mask, u8 **buffer)
1936 int id, ret_len = 0;
1937 struct mwifiex_ie_types_vendor_param_set *vs_param_set;
1945 * Traverse through the saved vendor specific IE array and append
1946 * the selected(scan/assoc/adhoc) IE as TLV to the command
1948 for (id = 0; id < MWIFIEX_MAX_VSIE_NUM; id++) {
1949 if (priv->vs_ie[id].mask & vsie_mask) {
1951 (struct mwifiex_ie_types_vendor_param_set *)
1953 vs_param_set->header.type =
1954 cpu_to_le16(TLV_TYPE_PASSTHROUGH);
1955 vs_param_set->header.len =
1956 cpu_to_le16((((u16) priv->vs_ie[id].ie[1])
1958 memcpy(vs_param_set->ie, priv->vs_ie[id].ie,
1959 le16_to_cpu(vs_param_set->header.len));
1960 *buffer += le16_to_cpu(vs_param_set->header.len) +
1961 sizeof(struct mwifiex_ie_types_header);
1962 ret_len += le16_to_cpu(vs_param_set->header.len) +
1963 sizeof(struct mwifiex_ie_types_header);
1970 * This function saves a beacon buffer of the current BSS descriptor.
1972 * The current beacon buffer is saved so that it can be restored in the
1973 * following cases that makes the beacon buffer not to contain the current
1974 * ssid's beacon buffer.
1975 * - The current ssid was not found somehow in the last scan.
1976 * - The current ssid was the last entry of the scan table and overloaded.
1979 mwifiex_save_curr_bcn(struct mwifiex_private *priv)
1981 struct mwifiex_bssdescriptor *curr_bss =
1982 &priv->curr_bss_params.bss_descriptor;
1984 if (!curr_bss->beacon_buf_size)
1987 /* allocate beacon buffer at 1st time; or if it's size has changed */
1988 if (!priv->curr_bcn_buf ||
1989 priv->curr_bcn_size != curr_bss->beacon_buf_size) {
1990 priv->curr_bcn_size = curr_bss->beacon_buf_size;
1992 kfree(priv->curr_bcn_buf);
1993 priv->curr_bcn_buf = kmalloc(curr_bss->beacon_buf_size,
1995 if (!priv->curr_bcn_buf) {
1996 dev_err(priv->adapter->dev,
1997 "failed to alloc curr_bcn_buf\n");
2002 memcpy(priv->curr_bcn_buf, curr_bss->beacon_buf,
2003 curr_bss->beacon_buf_size);
2004 dev_dbg(priv->adapter->dev, "info: current beacon saved %d\n",
2005 priv->curr_bcn_size);
2007 curr_bss->beacon_buf = priv->curr_bcn_buf;
2009 /* adjust the pointers in the current BSS descriptor */
2010 if (curr_bss->bcn_wpa_ie)
2011 curr_bss->bcn_wpa_ie =
2012 (struct ieee_types_vendor_specific *)
2013 (curr_bss->beacon_buf +
2014 curr_bss->wpa_offset);
2016 if (curr_bss->bcn_rsn_ie)
2017 curr_bss->bcn_rsn_ie = (struct ieee_types_generic *)
2018 (curr_bss->beacon_buf +
2019 curr_bss->rsn_offset);
2021 if (curr_bss->bcn_ht_cap)
2022 curr_bss->bcn_ht_cap = (struct ieee80211_ht_cap *)
2023 (curr_bss->beacon_buf +
2024 curr_bss->ht_cap_offset);
2026 if (curr_bss->bcn_ht_info)
2027 curr_bss->bcn_ht_info = (struct ieee80211_ht_info *)
2028 (curr_bss->beacon_buf +
2029 curr_bss->ht_info_offset);
2031 if (curr_bss->bcn_bss_co_2040)
2032 curr_bss->bcn_bss_co_2040 =
2033 (u8 *) (curr_bss->beacon_buf +
2034 curr_bss->bss_co_2040_offset);
2036 if (curr_bss->bcn_ext_cap)
2037 curr_bss->bcn_ext_cap = (u8 *) (curr_bss->beacon_buf +
2038 curr_bss->ext_cap_offset);
2042 * This function frees the current BSS descriptor beacon buffer.
2045 mwifiex_free_curr_bcn(struct mwifiex_private *priv)
2047 kfree(priv->curr_bcn_buf);
2048 priv->curr_bcn_buf = NULL;