2 * Driver interaction with Linux nl80211/cfg80211 - Scanning
3 * Copyright(c) 2015 Intel Deutschland GmbH
4 * Copyright (c) 2002-2014, Jouni Malinen <j@w1.fi>
5 * Copyright (c) 2007, Johannes Berg <johannes@sipsolutions.net>
6 * Copyright (c) 2009-2010, Atheros Communications
8 * This software may be distributed under the terms of the BSD license.
9 * See README for more details.
13 #include <netlink/genl/genl.h>
15 #include "utils/common.h"
16 #include "utils/eloop.h"
17 #include "common/ieee802_11_defs.h"
18 #include "common/ieee802_11_common.h"
19 #include "common/qca-vendor.h"
20 #include "driver_nl80211.h"
23 static int get_noise_for_scan_results(struct nl_msg *msg, void *arg)
25 struct nlattr *tb[NL80211_ATTR_MAX + 1];
26 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
27 struct nlattr *sinfo[NL80211_SURVEY_INFO_MAX + 1];
28 static struct nla_policy survey_policy[NL80211_SURVEY_INFO_MAX + 1] = {
29 [NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
30 [NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
32 struct wpa_scan_results *scan_results = arg;
33 struct wpa_scan_res *scan_res;
36 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
37 genlmsg_attrlen(gnlh, 0), NULL);
39 if (!tb[NL80211_ATTR_SURVEY_INFO]) {
40 wpa_printf(MSG_DEBUG, "nl80211: Survey data missing");
44 if (nla_parse_nested(sinfo, NL80211_SURVEY_INFO_MAX,
45 tb[NL80211_ATTR_SURVEY_INFO],
47 wpa_printf(MSG_DEBUG, "nl80211: Failed to parse nested "
52 if (!sinfo[NL80211_SURVEY_INFO_NOISE])
55 if (!sinfo[NL80211_SURVEY_INFO_FREQUENCY])
58 for (i = 0; i < scan_results->num; ++i) {
59 scan_res = scan_results->res[i];
62 if ((int) nla_get_u32(sinfo[NL80211_SURVEY_INFO_FREQUENCY]) !=
65 if (!(scan_res->flags & WPA_SCAN_NOISE_INVALID))
67 scan_res->noise = (s8)
68 nla_get_u8(sinfo[NL80211_SURVEY_INFO_NOISE]);
69 scan_res->flags &= ~WPA_SCAN_NOISE_INVALID;
76 static int nl80211_get_noise_for_scan_results(
77 struct wpa_driver_nl80211_data *drv,
78 struct wpa_scan_results *scan_res)
82 msg = nl80211_drv_msg(drv, NLM_F_DUMP, NL80211_CMD_GET_SURVEY);
83 return send_and_recv_msgs(drv, msg, get_noise_for_scan_results,
89 * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
90 * @eloop_ctx: Driver private data
91 * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
93 * This function can be used as registered timeout when starting a scan to
94 * generate a scan completed event if the driver does not report this.
96 void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
98 struct wpa_driver_nl80211_data *drv = eloop_ctx;
100 wpa_printf(MSG_DEBUG, "nl80211: Scan timeout - try to abort it");
101 if (!wpa_driver_nl80211_abort_scan(drv->first_bss))
104 wpa_printf(MSG_DEBUG, "nl80211: Failed to abort scan");
106 if (drv->ap_scan_as_station != NL80211_IFTYPE_UNSPECIFIED) {
107 wpa_driver_nl80211_set_mode(drv->first_bss,
108 drv->ap_scan_as_station);
109 drv->ap_scan_as_station = NL80211_IFTYPE_UNSPECIFIED;
112 wpa_printf(MSG_DEBUG, "nl80211: Try to get scan results");
113 wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
117 static struct nl_msg *
118 nl80211_scan_common(struct i802_bss *bss, u8 cmd,
119 struct wpa_driver_scan_params *params)
121 struct wpa_driver_nl80211_data *drv = bss->drv;
126 msg = nl80211_cmd_msg(bss, 0, cmd);
130 if (params->num_ssids) {
131 struct nlattr *ssids;
133 ssids = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
136 for (i = 0; i < params->num_ssids; i++) {
137 wpa_hexdump_ascii(MSG_MSGDUMP, "nl80211: Scan SSID",
138 params->ssids[i].ssid,
139 params->ssids[i].ssid_len);
140 if (nla_put(msg, i + 1, params->ssids[i].ssid_len,
141 params->ssids[i].ssid))
144 nla_nest_end(msg, ssids);
146 wpa_printf(MSG_DEBUG, "nl80211: Passive scan requested");
149 if (params->extra_ies) {
150 wpa_hexdump(MSG_MSGDUMP, "nl80211: Scan extra IEs",
151 params->extra_ies, params->extra_ies_len);
152 if (nla_put(msg, NL80211_ATTR_IE, params->extra_ies_len,
158 struct nlattr *freqs;
159 freqs = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
162 for (i = 0; params->freqs[i]; i++) {
163 wpa_printf(MSG_MSGDUMP, "nl80211: Scan frequency %u "
164 "MHz", params->freqs[i]);
165 if (nla_put_u32(msg, i + 1, params->freqs[i]))
168 nla_nest_end(msg, freqs);
171 os_free(drv->filter_ssids);
172 drv->filter_ssids = params->filter_ssids;
173 params->filter_ssids = NULL;
174 drv->num_filter_ssids = params->num_filter_ssids;
176 if (params->only_new_results) {
177 wpa_printf(MSG_DEBUG, "nl80211: Add NL80211_SCAN_FLAG_FLUSH");
178 scan_flags |= NL80211_SCAN_FLAG_FLUSH;
181 if (params->low_priority && drv->have_low_prio_scan) {
182 wpa_printf(MSG_DEBUG,
183 "nl80211: Add NL80211_SCAN_FLAG_LOW_PRIORITY");
184 scan_flags |= NL80211_SCAN_FLAG_LOW_PRIORITY;
187 if (params->mac_addr_rand) {
188 wpa_printf(MSG_DEBUG,
189 "nl80211: Add NL80211_SCAN_FLAG_RANDOM_ADDR");
190 scan_flags |= NL80211_SCAN_FLAG_RANDOM_ADDR;
192 if (params->mac_addr) {
193 wpa_printf(MSG_DEBUG, "nl80211: MAC address: " MACSTR,
194 MAC2STR(params->mac_addr));
195 if (nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN,
200 if (params->mac_addr_mask) {
201 wpa_printf(MSG_DEBUG, "nl80211: MAC address mask: "
202 MACSTR, MAC2STR(params->mac_addr_mask));
203 if (nla_put(msg, NL80211_ATTR_MAC_MASK, ETH_ALEN,
204 params->mac_addr_mask))
210 nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, scan_flags))
222 * wpa_driver_nl80211_scan - Request the driver to initiate scan
223 * @bss: Pointer to private driver data from wpa_driver_nl80211_init()
224 * @params: Scan parameters
225 * Returns: 0 on success, -1 on failure
227 int wpa_driver_nl80211_scan(struct i802_bss *bss,
228 struct wpa_driver_scan_params *params)
230 struct wpa_driver_nl80211_data *drv = bss->drv;
231 int ret = -1, timeout;
232 struct nl_msg *msg = NULL;
234 wpa_dbg(drv->ctx, MSG_DEBUG, "nl80211: scan request");
235 drv->scan_for_auth = 0;
240 msg = nl80211_scan_common(bss, NL80211_CMD_TRIGGER_SCAN, params);
244 if (params->p2p_probe) {
245 struct nlattr *rates;
247 wpa_printf(MSG_DEBUG, "nl80211: P2P probe - mask SuppRates");
249 rates = nla_nest_start(msg, NL80211_ATTR_SCAN_SUPP_RATES);
254 * Remove 2.4 GHz rates 1, 2, 5.5, 11 Mbps from supported rates
255 * by masking out everything else apart from the OFDM rates 6,
256 * 9, 12, 18, 24, 36, 48, 54 Mbps from non-MCS rates. All 5 GHz
257 * rates are left enabled.
259 if (nla_put(msg, NL80211_BAND_2GHZ, 8,
260 "\x0c\x12\x18\x24\x30\x48\x60\x6c"))
262 nla_nest_end(msg, rates);
264 if (nla_put_flag(msg, NL80211_ATTR_TX_NO_CCK_RATE))
269 wpa_printf(MSG_DEBUG, "nl80211: Scan for a specific BSSID: "
270 MACSTR, MAC2STR(params->bssid));
271 if (nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid))
275 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
278 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
279 "(%s)", ret, strerror(-ret));
280 if (drv->hostapd && is_ap_interface(drv->nlmode)) {
281 enum nl80211_iftype old_mode = drv->nlmode;
284 * mac80211 does not allow scan requests in AP mode, so
285 * try to do this in station mode.
287 if (wpa_driver_nl80211_set_mode(
288 bss, NL80211_IFTYPE_STATION))
291 if (wpa_driver_nl80211_scan(bss, params)) {
292 wpa_driver_nl80211_set_mode(bss, old_mode);
296 /* Restore AP mode when processing scan results */
297 drv->ap_scan_as_station = old_mode;
303 drv->scan_state = SCAN_REQUESTED;
304 /* Not all drivers generate "scan completed" wireless event, so try to
305 * read results after a timeout. */
307 if (drv->scan_complete_events) {
309 * The driver seems to deliver events to notify when scan is
310 * complete, so use longer timeout to avoid race conditions
311 * with scanning and following association request.
315 wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
316 "seconds", ret, timeout);
317 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
318 eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
320 drv->last_scan_cmd = NL80211_CMD_TRIGGER_SCAN;
329 nl80211_sched_scan_add_scan_plans(struct wpa_driver_nl80211_data *drv,
331 struct wpa_driver_scan_params *params)
333 struct nlattr *plans;
334 struct sched_scan_plan *scan_plans = params->sched_scan_plans;
337 plans = nla_nest_start(msg, NL80211_ATTR_SCHED_SCAN_PLANS);
341 for (i = 0; i < params->sched_scan_plans_num; i++) {
342 struct nlattr *plan = nla_nest_start(msg, i + 1);
347 if (!scan_plans[i].interval ||
348 scan_plans[i].interval >
349 drv->capa.max_sched_scan_plan_interval) {
350 wpa_printf(MSG_DEBUG,
351 "nl80211: sched scan plan no. %u: Invalid interval: %u",
352 i, scan_plans[i].interval);
356 if (nla_put_u32(msg, NL80211_SCHED_SCAN_PLAN_INTERVAL,
357 scan_plans[i].interval))
360 if (scan_plans[i].iterations >
361 drv->capa.max_sched_scan_plan_iterations) {
362 wpa_printf(MSG_DEBUG,
363 "nl80211: sched scan plan no. %u: Invalid number of iterations: %u",
364 i, scan_plans[i].iterations);
368 if (scan_plans[i].iterations &&
369 nla_put_u32(msg, NL80211_SCHED_SCAN_PLAN_ITERATIONS,
370 scan_plans[i].iterations))
373 nla_nest_end(msg, plan);
376 * All the scan plans must specify the number of iterations
377 * except the last plan, which will run infinitely. So if the
378 * number of iterations is not specified, this ought to be the
381 if (!scan_plans[i].iterations)
385 if (i != params->sched_scan_plans_num - 1) {
386 wpa_printf(MSG_DEBUG,
387 "nl80211: All sched scan plans but the last must specify number of iterations");
391 nla_nest_end(msg, plans);
397 * wpa_driver_nl80211_sched_scan - Initiate a scheduled scan
398 * @priv: Pointer to private driver data from wpa_driver_nl80211_init()
399 * @params: Scan parameters
400 * Returns: 0 on success, -1 on failure or if not supported
402 int wpa_driver_nl80211_sched_scan(void *priv,
403 struct wpa_driver_scan_params *params)
405 struct i802_bss *bss = priv;
406 struct wpa_driver_nl80211_data *drv = bss->drv;
411 wpa_dbg(drv->ctx, MSG_DEBUG, "nl80211: sched_scan request");
414 if (!drv->capa.sched_scan_supported)
415 return android_pno_start(bss, params);
418 if (!params->sched_scan_plans_num ||
419 params->sched_scan_plans_num > drv->capa.max_sched_scan_plans) {
420 wpa_printf(MSG_ERROR,
421 "nl80211: Invalid number of sched scan plans: %u",
422 params->sched_scan_plans_num);
426 msg = nl80211_scan_common(bss, NL80211_CMD_START_SCHED_SCAN, params);
430 if (drv->capa.max_sched_scan_plan_iterations) {
431 if (nl80211_sched_scan_add_scan_plans(drv, msg, params))
434 if (nla_put_u32(msg, NL80211_ATTR_SCHED_SCAN_INTERVAL,
435 params->sched_scan_plans[0].interval * 1000))
439 if ((drv->num_filter_ssids &&
440 (int) drv->num_filter_ssids <= drv->capa.max_match_sets) ||
441 params->filter_rssi) {
442 struct nlattr *match_sets;
443 match_sets = nla_nest_start(msg, NL80211_ATTR_SCHED_SCAN_MATCH);
444 if (match_sets == NULL)
447 for (i = 0; i < drv->num_filter_ssids; i++) {
448 struct nlattr *match_set_ssid;
449 wpa_hexdump_ascii(MSG_MSGDUMP,
450 "nl80211: Sched scan filter SSID",
451 drv->filter_ssids[i].ssid,
452 drv->filter_ssids[i].ssid_len);
454 match_set_ssid = nla_nest_start(msg, i + 1);
455 if (match_set_ssid == NULL ||
456 nla_put(msg, NL80211_ATTR_SCHED_SCAN_MATCH_SSID,
457 drv->filter_ssids[i].ssid_len,
458 drv->filter_ssids[i].ssid) ||
459 (params->filter_rssi &&
461 NL80211_SCHED_SCAN_MATCH_ATTR_RSSI,
462 params->filter_rssi)))
465 nla_nest_end(msg, match_set_ssid);
469 * Due to backward compatibility code, newer kernels treat this
470 * matchset (with only an RSSI filter) as the default for all
471 * other matchsets, unless it's the only one, in which case the
472 * matchset will actually allow all SSIDs above the RSSI.
474 if (params->filter_rssi) {
475 struct nlattr *match_set_rssi;
476 match_set_rssi = nla_nest_start(msg, 0);
477 if (match_set_rssi == NULL ||
478 nla_put_u32(msg, NL80211_SCHED_SCAN_MATCH_ATTR_RSSI,
479 params->filter_rssi))
481 wpa_printf(MSG_MSGDUMP,
482 "nl80211: Sched scan RSSI filter %d dBm",
483 params->filter_rssi);
484 nla_nest_end(msg, match_set_rssi);
487 nla_nest_end(msg, match_sets);
490 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
492 /* TODO: if we get an error here, we should fall back to normal scan */
496 wpa_printf(MSG_DEBUG, "nl80211: Sched scan start failed: "
497 "ret=%d (%s)", ret, strerror(-ret));
501 wpa_printf(MSG_DEBUG, "nl80211: Sched scan requested (ret=%d)", ret);
510 * wpa_driver_nl80211_stop_sched_scan - Stop a scheduled scan
511 * @priv: Pointer to private driver data from wpa_driver_nl80211_init()
512 * Returns: 0 on success, -1 on failure or if not supported
514 int wpa_driver_nl80211_stop_sched_scan(void *priv)
516 struct i802_bss *bss = priv;
517 struct wpa_driver_nl80211_data *drv = bss->drv;
522 if (!drv->capa.sched_scan_supported)
523 return android_pno_stop(bss);
526 msg = nl80211_drv_msg(drv, 0, NL80211_CMD_STOP_SCHED_SCAN);
527 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
529 wpa_printf(MSG_DEBUG,
530 "nl80211: Sched scan stop failed: ret=%d (%s)",
531 ret, strerror(-ret));
533 wpa_printf(MSG_DEBUG,
534 "nl80211: Sched scan stop sent");
541 static int nl80211_scan_filtered(struct wpa_driver_nl80211_data *drv,
542 const u8 *ie, size_t ie_len)
547 if (drv->filter_ssids == NULL)
550 ssid = get_ie(ie, ie_len, WLAN_EID_SSID);
554 for (i = 0; i < drv->num_filter_ssids; i++) {
555 if (ssid[1] == drv->filter_ssids[i].ssid_len &&
556 os_memcmp(ssid + 2, drv->filter_ssids[i].ssid, ssid[1]) ==
565 int bss_info_handler(struct nl_msg *msg, void *arg)
567 struct nlattr *tb[NL80211_ATTR_MAX + 1];
568 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
569 struct nlattr *bss[NL80211_BSS_MAX + 1];
570 static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
571 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
572 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
573 [NL80211_BSS_TSF] = { .type = NLA_U64 },
574 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
575 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
576 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
577 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
578 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
579 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
580 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
581 [NL80211_BSS_BEACON_IES] = { .type = NLA_UNSPEC },
583 struct nl80211_bss_info_arg *_arg = arg;
584 struct wpa_scan_results *res = _arg->res;
585 struct wpa_scan_res **tmp;
586 struct wpa_scan_res *r;
587 const u8 *ie, *beacon_ie;
588 size_t ie_len, beacon_ie_len;
592 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
593 genlmsg_attrlen(gnlh, 0), NULL);
594 if (!tb[NL80211_ATTR_BSS])
596 if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
599 if (bss[NL80211_BSS_STATUS]) {
600 enum nl80211_bss_status status;
601 status = nla_get_u32(bss[NL80211_BSS_STATUS]);
602 if (status == NL80211_BSS_STATUS_ASSOCIATED &&
603 bss[NL80211_BSS_FREQUENCY]) {
605 nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
606 wpa_printf(MSG_DEBUG, "nl80211: Associated on %u MHz",
609 if (status == NL80211_BSS_STATUS_IBSS_JOINED &&
610 bss[NL80211_BSS_FREQUENCY]) {
612 nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
613 wpa_printf(MSG_DEBUG, "nl80211: IBSS-joined on %u MHz",
616 if (status == NL80211_BSS_STATUS_ASSOCIATED &&
617 bss[NL80211_BSS_BSSID]) {
618 os_memcpy(_arg->assoc_bssid,
619 nla_data(bss[NL80211_BSS_BSSID]), ETH_ALEN);
620 wpa_printf(MSG_DEBUG, "nl80211: Associated with "
621 MACSTR, MAC2STR(_arg->assoc_bssid));
626 if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
627 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
628 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
633 if (bss[NL80211_BSS_BEACON_IES]) {
634 beacon_ie = nla_data(bss[NL80211_BSS_BEACON_IES]);
635 beacon_ie_len = nla_len(bss[NL80211_BSS_BEACON_IES]);
641 if (nl80211_scan_filtered(_arg->drv, ie ? ie : beacon_ie,
642 ie ? ie_len : beacon_ie_len))
645 r = os_zalloc(sizeof(*r) + ie_len + beacon_ie_len);
648 if (bss[NL80211_BSS_BSSID])
649 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
651 if (bss[NL80211_BSS_FREQUENCY])
652 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
653 if (bss[NL80211_BSS_BEACON_INTERVAL])
654 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
655 if (bss[NL80211_BSS_CAPABILITY])
656 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
657 r->flags |= WPA_SCAN_NOISE_INVALID;
658 if (bss[NL80211_BSS_SIGNAL_MBM]) {
659 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
660 r->level /= 100; /* mBm to dBm */
661 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
662 } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
663 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
664 r->flags |= WPA_SCAN_QUAL_INVALID;
666 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
667 if (bss[NL80211_BSS_TSF])
668 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
669 if (bss[NL80211_BSS_BEACON_TSF]) {
670 u64 tsf = nla_get_u64(bss[NL80211_BSS_BEACON_TSF]);
674 if (bss[NL80211_BSS_SEEN_MS_AGO])
675 r->age = nla_get_u32(bss[NL80211_BSS_SEEN_MS_AGO]);
677 pos = (u8 *) (r + 1);
679 os_memcpy(pos, ie, ie_len);
682 r->beacon_ie_len = beacon_ie_len;
684 os_memcpy(pos, beacon_ie, beacon_ie_len);
686 if (bss[NL80211_BSS_STATUS]) {
687 enum nl80211_bss_status status;
688 status = nla_get_u32(bss[NL80211_BSS_STATUS]);
690 case NL80211_BSS_STATUS_ASSOCIATED:
691 r->flags |= WPA_SCAN_ASSOCIATED;
699 * cfg80211 maintains separate BSS table entries for APs if the same
700 * BSSID,SSID pair is seen on multiple channels. wpa_supplicant does
701 * not use frequency as a separate key in the BSS table, so filter out
702 * duplicated entries. Prefer associated BSS entry in such a case in
703 * order to get the correct frequency into the BSS table. Similarly,
704 * prefer newer entries over older.
706 for (i = 0; i < res->num; i++) {
708 if (os_memcmp(res->res[i]->bssid, r->bssid, ETH_ALEN) != 0)
711 s1 = get_ie((u8 *) (res->res[i] + 1),
712 res->res[i]->ie_len, WLAN_EID_SSID);
713 s2 = get_ie((u8 *) (r + 1), r->ie_len, WLAN_EID_SSID);
714 if (s1 == NULL || s2 == NULL || s1[1] != s2[1] ||
715 os_memcmp(s1, s2, 2 + s1[1]) != 0)
718 /* Same BSSID,SSID was already included in scan results */
719 wpa_printf(MSG_DEBUG, "nl80211: Remove duplicated scan result "
720 "for " MACSTR, MAC2STR(r->bssid));
722 if (((r->flags & WPA_SCAN_ASSOCIATED) &&
723 !(res->res[i]->flags & WPA_SCAN_ASSOCIATED)) ||
724 r->age < res->res[i]->age) {
725 os_free(res->res[i]);
732 tmp = os_realloc_array(res->res, res->num + 1,
733 sizeof(struct wpa_scan_res *));
745 static void clear_state_mismatch(struct wpa_driver_nl80211_data *drv,
748 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
749 wpa_printf(MSG_DEBUG, "nl80211: Clear possible state "
750 "mismatch (" MACSTR ")", MAC2STR(addr));
751 wpa_driver_nl80211_mlme(drv, addr,
752 NL80211_CMD_DEAUTHENTICATE,
753 WLAN_REASON_PREV_AUTH_NOT_VALID, 1);
758 static void wpa_driver_nl80211_check_bss_status(
759 struct wpa_driver_nl80211_data *drv, struct wpa_scan_results *res)
763 for (i = 0; i < res->num; i++) {
764 struct wpa_scan_res *r = res->res[i];
766 if (r->flags & WPA_SCAN_ASSOCIATED) {
767 wpa_printf(MSG_DEBUG, "nl80211: Scan results "
768 "indicate BSS status with " MACSTR
771 if (is_sta_interface(drv->nlmode) &&
773 wpa_printf(MSG_DEBUG, "nl80211: Local state "
774 "(not associated) does not match "
776 clear_state_mismatch(drv, r->bssid);
777 } else if (is_sta_interface(drv->nlmode) &&
778 os_memcmp(drv->bssid, r->bssid, ETH_ALEN) !=
780 wpa_printf(MSG_DEBUG, "nl80211: Local state "
781 "(associated with " MACSTR ") does "
782 "not match with BSS state",
783 MAC2STR(drv->bssid));
784 clear_state_mismatch(drv, r->bssid);
785 clear_state_mismatch(drv, drv->bssid);
792 static struct wpa_scan_results *
793 nl80211_get_scan_results(struct wpa_driver_nl80211_data *drv)
796 struct wpa_scan_results *res;
798 struct nl80211_bss_info_arg arg;
800 res = os_zalloc(sizeof(*res));
803 if (!(msg = nl80211_cmd_msg(drv->first_bss, NLM_F_DUMP,
804 NL80211_CMD_GET_SCAN))) {
805 wpa_scan_results_free(res);
811 ret = send_and_recv_msgs(drv, msg, bss_info_handler, &arg);
813 wpa_printf(MSG_DEBUG, "nl80211: Received scan results (%lu "
814 "BSSes)", (unsigned long) res->num);
815 nl80211_get_noise_for_scan_results(drv, res);
818 wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
819 "(%s)", ret, strerror(-ret));
820 wpa_scan_results_free(res);
826 * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
827 * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
828 * Returns: Scan results on success, -1 on failure
830 struct wpa_scan_results * wpa_driver_nl80211_get_scan_results(void *priv)
832 struct i802_bss *bss = priv;
833 struct wpa_driver_nl80211_data *drv = bss->drv;
834 struct wpa_scan_results *res;
836 res = nl80211_get_scan_results(drv);
838 wpa_driver_nl80211_check_bss_status(drv, res);
843 void nl80211_dump_scan(struct wpa_driver_nl80211_data *drv)
845 struct wpa_scan_results *res;
848 res = nl80211_get_scan_results(drv);
850 wpa_printf(MSG_DEBUG, "nl80211: Failed to get scan results");
854 wpa_printf(MSG_DEBUG, "nl80211: Scan result dump");
855 for (i = 0; i < res->num; i++) {
856 struct wpa_scan_res *r = res->res[i];
857 wpa_printf(MSG_DEBUG, "nl80211: %d/%d " MACSTR "%s",
858 (int) i, (int) res->num, MAC2STR(r->bssid),
859 r->flags & WPA_SCAN_ASSOCIATED ? " [assoc]" : "");
862 wpa_scan_results_free(res);
866 int wpa_driver_nl80211_abort_scan(void *priv)
868 struct i802_bss *bss = priv;
869 struct wpa_driver_nl80211_data *drv = bss->drv;
873 wpa_printf(MSG_DEBUG, "nl80211: Abort scan");
874 msg = nl80211_cmd_msg(bss, 0, NL80211_CMD_ABORT_SCAN);
875 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
877 wpa_printf(MSG_DEBUG, "nl80211: Abort scan failed: ret=%d (%s)",
878 ret, strerror(-ret));
885 #ifdef CONFIG_DRIVER_NL80211_QCA
887 static int scan_cookie_handler(struct nl_msg *msg, void *arg)
889 struct nlattr *tb[NL80211_ATTR_MAX + 1];
890 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
893 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
894 genlmsg_attrlen(gnlh, 0), NULL);
896 if (tb[NL80211_ATTR_VENDOR_DATA]) {
897 struct nlattr *nl_vendor = tb[NL80211_ATTR_VENDOR_DATA];
898 struct nlattr *tb_vendor[QCA_WLAN_VENDOR_ATTR_SCAN_MAX + 1];
900 nla_parse(tb_vendor, QCA_WLAN_VENDOR_ATTR_SCAN_MAX,
901 nla_data(nl_vendor), nla_len(nl_vendor), NULL);
903 if (tb_vendor[QCA_WLAN_VENDOR_ATTR_SCAN_COOKIE])
904 *cookie = nla_get_u64(
905 tb_vendor[QCA_WLAN_VENDOR_ATTR_SCAN_COOKIE]);
913 * wpa_driver_nl80211_vendor_scan - Request the driver to initiate a vendor scan
914 * @bss: Pointer to private driver data from wpa_driver_nl80211_init()
915 * @params: Scan parameters
916 * Returns: 0 on success, -1 on failure
918 int wpa_driver_nl80211_vendor_scan(struct i802_bss *bss,
919 struct wpa_driver_scan_params *params)
921 struct wpa_driver_nl80211_data *drv = bss->drv;
922 struct nl_msg *msg = NULL;
929 wpa_dbg(drv->ctx, MSG_DEBUG, "nl80211: vendor scan request");
930 drv->scan_for_auth = 0;
932 if (!(msg = nl80211_drv_msg(drv, 0, NL80211_CMD_VENDOR)) ||
933 nla_put_u32(msg, NL80211_ATTR_VENDOR_ID, OUI_QCA) ||
934 nla_put_u32(msg, NL80211_ATTR_VENDOR_SUBCMD,
935 QCA_NL80211_VENDOR_SUBCMD_TRIGGER_SCAN) )
938 attr = nla_nest_start(msg, NL80211_ATTR_VENDOR_DATA);
942 if (params->num_ssids) {
943 struct nlattr *ssids;
945 ssids = nla_nest_start(msg, QCA_WLAN_VENDOR_ATTR_SCAN_SSIDS);
948 for (i = 0; i < params->num_ssids; i++) {
949 wpa_hexdump_ascii(MSG_MSGDUMP, "nl80211: Scan SSID",
950 params->ssids[i].ssid,
951 params->ssids[i].ssid_len);
952 if (nla_put(msg, i + 1, params->ssids[i].ssid_len,
953 params->ssids[i].ssid))
956 nla_nest_end(msg, ssids);
959 if (params->extra_ies) {
960 wpa_hexdump(MSG_MSGDUMP, "nl80211: Scan extra IEs",
961 params->extra_ies, params->extra_ies_len);
962 if (nla_put(msg, QCA_WLAN_VENDOR_ATTR_SCAN_IE,
963 params->extra_ies_len, params->extra_ies))
968 struct nlattr *freqs;
970 freqs = nla_nest_start(msg,
971 QCA_WLAN_VENDOR_ATTR_SCAN_FREQUENCIES);
974 for (i = 0; params->freqs[i]; i++) {
975 wpa_printf(MSG_MSGDUMP,
976 "nl80211: Scan frequency %u MHz",
978 if (nla_put_u32(msg, i + 1, params->freqs[i]))
981 nla_nest_end(msg, freqs);
984 os_free(drv->filter_ssids);
985 drv->filter_ssids = params->filter_ssids;
986 params->filter_ssids = NULL;
987 drv->num_filter_ssids = params->num_filter_ssids;
989 if (params->low_priority && drv->have_low_prio_scan) {
990 wpa_printf(MSG_DEBUG,
991 "nl80211: Add NL80211_SCAN_FLAG_LOW_PRIORITY");
992 scan_flags |= NL80211_SCAN_FLAG_LOW_PRIORITY;
995 if (params->mac_addr_rand) {
996 wpa_printf(MSG_DEBUG,
997 "nl80211: Add NL80211_SCAN_FLAG_RANDOM_ADDR");
998 scan_flags |= NL80211_SCAN_FLAG_RANDOM_ADDR;
1000 if (params->mac_addr) {
1001 wpa_printf(MSG_DEBUG, "nl80211: MAC address: " MACSTR,
1002 MAC2STR(params->mac_addr));
1003 if (nla_put(msg, QCA_WLAN_VENDOR_ATTR_SCAN_MAC,
1004 ETH_ALEN, params->mac_addr))
1008 if (params->mac_addr_mask) {
1009 wpa_printf(MSG_DEBUG, "nl80211: MAC address mask: "
1010 MACSTR, MAC2STR(params->mac_addr_mask));
1011 if (nla_put(msg, QCA_WLAN_VENDOR_ATTR_SCAN_MAC_MASK,
1012 ETH_ALEN, params->mac_addr_mask))
1018 nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, scan_flags))
1021 if (params->p2p_probe) {
1022 struct nlattr *rates;
1024 wpa_printf(MSG_DEBUG, "nl80211: P2P probe - mask SuppRates");
1026 rates = nla_nest_start(msg,
1027 QCA_WLAN_VENDOR_ATTR_SCAN_SUPP_RATES);
1032 * Remove 2.4 GHz rates 1, 2, 5.5, 11 Mbps from supported rates
1033 * by masking out everything else apart from the OFDM rates 6,
1034 * 9, 12, 18, 24, 36, 48, 54 Mbps from non-MCS rates. All 5 GHz
1035 * rates are left enabled.
1037 if (nla_put(msg, NL80211_BAND_2GHZ, 8,
1038 "\x0c\x12\x18\x24\x30\x48\x60\x6c"))
1040 nla_nest_end(msg, rates);
1042 if (nla_put_flag(msg, QCA_WLAN_VENDOR_ATTR_SCAN_TX_NO_CCK_RATE))
1046 nla_nest_end(msg, attr);
1048 ret = send_and_recv_msgs(drv, msg, scan_cookie_handler, &cookie);
1051 wpa_printf(MSG_DEBUG,
1052 "nl80211: Vendor scan trigger failed: ret=%d (%s)",
1053 ret, strerror(-ret));
1057 drv->vendor_scan_cookie = cookie;
1058 drv->scan_state = SCAN_REQUESTED;
1060 wpa_printf(MSG_DEBUG,
1061 "nl80211: Vendor scan requested (ret=%d) - scan timeout 30 seconds, scan cookie:0x%llx",
1062 ret, (long long unsigned int) cookie);
1063 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1064 eloop_register_timeout(30, 0, wpa_driver_nl80211_scan_timeout,
1066 drv->last_scan_cmd = NL80211_CMD_VENDOR;
1073 #endif /* CONFIG_DRIVER_NL80211_QCA */