wpa_supplicant: Add support for Beacon Report Radio Measurement

Beacon Report Radio Measurement is defined in IEEE Std 802.11-2016,
11.11.9.1. Beacon Report is implemented by triggering a scan on the
requested channels with the requested parameters.

Signed-off-by: Avraham Stern <avraham.stern@intel.com>

wpa_supplicant/Android.mk

@@ -92,6 +92,7 @@ OBJS += eap_register.c
 OBJS += src/utils/common.c
 OBJS += src/utils/wpa_debug.c
 OBJS += src/utils/wpabuf.c
+OBJS += src/utils/bitfield.c
 OBJS += wmm_ac.c
 OBJS += op_classes.c
 OBJS += rrm.c
@@ -311,7 +312,6 @@ OBJS += src/p2p/p2p_invitation.c
 OBJS += src/p2p/p2p_dev_disc.c
 OBJS += src/p2p/p2p_group.c
 OBJS += src/ap/p2p_hostapd.c
-OBJS += src/utils/bitfield.c
 L_CFLAGS += -DCONFIG_P2P
 NEED_GAS=y
 NEED_OFFCHANNEL=y

wpa_supplicant/Makefile

@@ -103,6 +103,7 @@ OBJS += eap_register.o
 OBJS += ../src/utils/common.o
 OBJS += ../src/utils/wpa_debug.o
 OBJS += ../src/utils/wpabuf.o
+OBJS += ../src/utils/bitfield.o
 OBJS += op_classes.o
 OBJS += rrm.o
 OBJS_p = wpa_passphrase.o
@@ -352,7 +353,6 @@ OBJS += ../src/p2p/p2p_invitation.o
 OBJS += ../src/p2p/p2p_dev_disc.o
 OBJS += ../src/p2p/p2p_group.o
 OBJS += ../src/ap/p2p_hostapd.o
-OBJS += ../src/utils/bitfield.o
 CFLAGS += -DCONFIG_P2P
 NEED_GAS=y
 NEED_OFFCHANNEL=y
@@ -1604,9 +1604,6 @@ OBJS += ../src/crypto/crypto_module_tests.o
 ifdef CONFIG_WPS
 OBJS += ../src/wps/wps_module_tests.o
 endif
-ifndef CONFIG_P2P
-OBJS += ../src/utils/bitfield.o
-endif
 endif
 
 OBJS += ../src/drivers/driver_common.o

wpa_supplicant/events.c

@@ -1736,6 +1736,10 @@ static int _wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s,
 	if (sme_proc_obss_scan(wpa_s) > 0)
 		goto scan_work_done;
 
+	if (own_request &&
+	    wpas_beacon_rep_scan_process(wpa_s, scan_res, &data->scan_info) > 0)
+		goto scan_work_done;
+
 	if ((wpa_s->conf->ap_scan == 2 && !wpas_wps_searching(wpa_s)))
 		goto scan_work_done;
 

wpa_supplicant/rrm.c

@@ -14,6 +14,8 @@
 #include "wpa_supplicant_i.h"
 #include "driver_i.h"
 #include "bss.h"
+#include "scan.h"
+#include "p2p_supplicant.h"
 
 
 static void wpas_rrm_neighbor_rep_timeout_handler(void *data, void *user_ctx)
@@ -47,6 +49,7 @@ void wpas_rrm_reset(struct wpa_supplicant *wpa_s)
 	if (wpa_s->rrm.notify_neighbor_rep)
 		wpas_rrm_neighbor_rep_timeout_handler(&wpa_s->rrm, NULL);
 	wpa_s->rrm.next_neighbor_rep_token = 1;
+	wpas_clear_beacon_rep_data(wpa_s);
 }
 
 
@@ -423,12 +426,696 @@ static void wpas_rrm_send_msr_report(struct wpa_supplicant *wpa_s,
 }
 
 
+static int wpas_add_channel(u8 op_class, u8 chan, u8 num_primary_channels,
+			    int *freqs)
+{
+	size_t i;
+
+	for (i = 0; i < num_primary_channels; i++) {
+		u8 primary_chan = chan - (2 * num_primary_channels - 2) + i * 4;
+
+		freqs[i] = ieee80211_chan_to_freq(NULL, op_class, primary_chan);
+		if (freqs[i] < 0) {
+			wpa_printf(MSG_DEBUG,
+				   "Beacon Report: Invalid channel %u",
+				   chan);
+			return -1;
+		}
+	}
+
+	return 0;
+}
+
+
+static int * wpas_add_channels(const struct oper_class_map *op,
+			       struct hostapd_hw_modes *mode, int active,
+			       const u8 *channels, const u8 size)
+{
+	int *freqs, *next_freq;
+	u8 num_primary_channels, i;
+	u8 num_chans;
+
+	num_chans = channels ? size :
+		(op->max_chan - op->min_chan) / op->inc + 1;
+
+	if (op->bw == BW80 || op->bw == BW80P80)
+		num_primary_channels = 4;
+	else if (op->bw == BW160)
+		num_primary_channels = 8;
+	else
+		num_primary_channels = 1;
+
+	/* one extra place for the zero-terminator */
+	freqs = os_calloc(num_chans * num_primary_channels + 1, sizeof(*freqs));
+	if (!freqs) {
+		wpa_printf(MSG_ERROR,
+			   "Beacon Report: Failed to allocate freqs array");
+		return NULL;
+	}
+
+	next_freq = freqs;
+	for  (i = 0; i < num_chans; i++) {
+		u8 chan = channels ? channels[i] : op->min_chan + i * op->inc;
+		enum chan_allowed res = verify_channel(mode, chan, op->bw);
+
+		if (res == NOT_ALLOWED || (res == NO_IR && active))
+			continue;
+
+		if (wpas_add_channel(op->op_class, chan, num_primary_channels,
+				     next_freq) < 0) {
+			os_free(freqs);
+			return NULL;
+		}
+
+		next_freq += num_primary_channels;
+	}
+
+	if (!freqs[0]) {
+		os_free(freqs);
+		return NULL;
+	}
+
+	return freqs;
+}
+
+
+static int * wpas_op_class_freqs(const struct oper_class_map *op,
+				 struct hostapd_hw_modes *mode, int active)
+{
+	u8 channels_80mhz[] = { 42, 58, 106, 122, 138, 155 };
+	u8 channels_160mhz[] = { 50, 114 };
+
+	/*
+	 * When adding all channels in the operating class, 80 + 80 MHz
+	 * operating classes are like 80 MHz channels because we add all valid
+	 * channels anyway.
+	 */
+	if (op->bw == BW80 || op->bw == BW80P80)
+		return wpas_add_channels(op, mode, active, channels_80mhz,
+					 ARRAY_SIZE(channels_80mhz));
+
+	if (op->bw == BW160)
+		return wpas_add_channels(op, mode, active, channels_160mhz,
+					 ARRAY_SIZE(channels_160mhz));
+
+	return wpas_add_channels(op, mode, active, NULL, 0);
+}
+
+
+static int * wpas_channel_report_freqs(struct wpa_supplicant *wpa_s, int active,
+				       const char *country, const u8 *subelems,
+				       size_t len)
+{
+	int *freqs = NULL, *new_freqs;
+	const u8 *end = subelems + len;
+
+	while (end - subelems > 2) {
+		const struct oper_class_map *op;
+		const u8 *ap_chan_elem, *pos;
+		u8 left;
+		struct hostapd_hw_modes *mode;
+
+		ap_chan_elem = get_ie(subelems, end - subelems,
+				      WLAN_BEACON_REQUEST_SUBELEM_AP_CHANNEL);
+		if (!ap_chan_elem)
+			break;
+		pos = ap_chan_elem + 2;
+		left = ap_chan_elem[1];
+		if (left < 1)
+			break;
+		subelems = ap_chan_elem + 2 + left;
+
+		op = get_oper_class(country, *pos);
+		if (!op) {
+			wpa_printf(MSG_DEBUG,
+				   "Beacon request: unknown operating class in AP Channel Report subelement %u",
+				   *pos);
+			goto out;
+		}
+		pos++;
+		left--;
+
+		mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, op->mode);
+		if (!mode)
+			continue;
+
+		/*
+		 * For 80 + 80 MHz operating classes, this AP Channel Report
+		 * element should be followed by another element specifying
+		 * the second 80 MHz channel. For now just add this 80 MHz
+		 * channel, the second 80 MHz channel will be added when the
+		 * next element is parsed.
+		 * TODO: Verify that this AP Channel Report element is followed
+		 * by a corresponding AP Channel Report element as specified in
+		 * IEEE Std 802.11-2016, 11.11.9.1.
+		 */
+		new_freqs = wpas_add_channels(op, mode, active, pos, left);
+		if (new_freqs)
+			int_array_concat(&freqs, new_freqs);
+
+		os_free(new_freqs);
+	}
+
+	return freqs;
+out:
+	os_free(freqs);
+	return NULL;
+}
+
+
+static int * wpas_beacon_request_freqs(struct wpa_supplicant *wpa_s,
+				       u8 op_class, u8 chan, int active,
+				       const u8 *subelems, size_t len)
+{
+	int *freqs = NULL, *ext_freqs = NULL;
+	struct hostapd_hw_modes *mode;
+	const char *country = NULL;
+	const struct oper_class_map *op;
+	const u8 *elem;
+
+	if (!wpa_s->current_bss)
+		return NULL;
+	elem = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY);
+	if (elem && elem[1] >= 2)
+		country = (const char *) (elem + 2);
+
+	op = get_oper_class(country, op_class);
+	if (!op) {
+		wpa_printf(MSG_DEBUG,
+			   "Beacon request: invalid operating class %d",
+			   op_class);
+		return NULL;
+	}
+
+	mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, op->mode);
+	if (!mode)
+		return NULL;
+
+	switch (chan) {
+	case 0:
+		freqs = wpas_op_class_freqs(op, mode, active);
+		if (!freqs)
+			return NULL;
+		break;
+	case 255:
+		/* freqs will be added from AP channel subelements */
+		break;
+	default:
+		freqs = wpas_add_channels(op, mode, active, &chan, 1);
+		if (!freqs)
+			return NULL;
+		break;
+	}
+
+	ext_freqs = wpas_channel_report_freqs(wpa_s, active, country, subelems,
+					      len);
+	if (ext_freqs) {
+		int_array_concat(&freqs, ext_freqs);
+		os_free(ext_freqs);
+	}
+
+	return freqs;
+}
+
+
+int wpas_get_op_chan_phy(int freq, const u8 *ies, size_t ies_len,
+			 u8 *op_class, u8 *chan, u8 *phy_type)
+{
+	const u8 *ie;
+	int sec_chan = 0, vht = 0;
+	struct ieee80211_ht_operation *ht_oper = NULL;
+	struct ieee80211_vht_operation *vht_oper = NULL;
+	u8 seg0, seg1;
+
+	ie = get_ie(ies, ies_len, WLAN_EID_HT_OPERATION);
+	if (ie && ie[1] >= sizeof(struct ieee80211_ht_operation)) {
+		u8 sec_chan_offset;
+
+		ht_oper = (struct ieee80211_ht_operation *) (ie + 2);
+		sec_chan_offset = ht_oper->ht_param &
+			HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK;
+		if (sec_chan_offset == HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
+			sec_chan = 1;
+		else if (sec_chan_offset ==
+			 HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
+			sec_chan = -1;
+	}
+
+	ie = get_ie(ies, ies_len, WLAN_EID_VHT_OPERATION);
+	if (ie && ie[1] >= sizeof(struct ieee80211_vht_operation)) {
+		vht_oper = (struct ieee80211_vht_operation *) (ie + 2);
+
+		switch (vht_oper->vht_op_info_chwidth) {
+		case 1:
+			seg0 = vht_oper->vht_op_info_chan_center_freq_seg0_idx;
+			seg1 = vht_oper->vht_op_info_chan_center_freq_seg1_idx;
+			if (seg1 && abs(seg1 - seg0) == 8)
+				vht = VHT_CHANWIDTH_160MHZ;
+			else if (seg1)
+				vht = VHT_CHANWIDTH_80P80MHZ;
+			else
+				vht = VHT_CHANWIDTH_80MHZ;
+			break;
+		case 2:
+			vht = VHT_CHANWIDTH_160MHZ;
+			break;
+		case 3:
+			vht = VHT_CHANWIDTH_80P80MHZ;
+			break;
+		default:
+			vht = VHT_CHANWIDTH_USE_HT;
+			break;
+		}
+	}
+
+	if (ieee80211_freq_to_channel_ext(freq, sec_chan, vht, op_class,
+					  chan) == NUM_HOSTAPD_MODES) {
+		wpa_printf(MSG_DEBUG,
+			   "Cannot determine operating class and channel");
+		return -1;
+	}
+
+	*phy_type = ieee80211_get_phy_type(freq, ht_oper != NULL,
+					   vht_oper != NULL);
+	if (*phy_type == PHY_TYPE_UNSPECIFIED) {
+		wpa_printf(MSG_DEBUG, "Cannot determine phy type");
+		return -1;
+	}
+
+	return 0;
+}
+
+
+static int wpas_beacon_rep_add_frame_body(struct bitfield *eids,
+					  enum beacon_report_detail detail,
+					  struct wpa_bss *bss, u8 *buf,
+					  size_t buf_len)
+{
+	u8 *ies = (u8 *) (bss + 1);
+	size_t ies_len = bss->ie_len ? bss->ie_len : bss->beacon_ie_len;
+	u8 *pos = buf;
+	int rem_len;
+
+	rem_len = 255 - sizeof(struct rrm_measurement_beacon_report) -
+		sizeof(struct rrm_measurement_report_element) - 2;
+
+	if (detail > BEACON_REPORT_DETAIL_ALL_FIELDS_AND_ELEMENTS) {
+		wpa_printf(MSG_DEBUG,
+			   "Beacon Request: Invalid reporting detail: %d",
+			   detail);
+		return -1;
+	}
+
+	if (detail == BEACON_REPORT_DETAIL_NONE)
+		return 0;
+
+	/*
+	 * Minimal frame body subelement size: EID(1) + length(1) + TSF(8) +
+	 * beacon interval(2) + capabilities(2) = 14 bytes
+	 */
+	if (buf_len < 14)
+		return 0;
+
+	*pos++ = WLAN_BEACON_REPORT_SUBELEM_FRAME_BODY;
+	/* The length will be filled later */
+	pos++;
+	WPA_PUT_LE64(pos, bss->tsf);
+	pos += sizeof(bss->tsf);
+	WPA_PUT_LE16(pos, bss->beacon_int);
+	pos += 2;
+	WPA_PUT_LE16(pos, bss->caps);
+	pos += 2;
+
+	rem_len -= pos - buf;
+
+	/*
+	 * According to IEEE Std 802.11-2016, 9.4.2.22.7, if the reported frame
+	 * body subelement causes the element to exceed the maximum element
+	 * size, the subelement is truncated so that the last IE is a complete
+	 * IE. So even when required to report all IEs, add elements one after
+	 * the other and stop once there is no more room in the measurement
+	 * element.
+	 */
+	while (ies_len > 2 && 2U + ies[1] <= ies_len && rem_len > 0) {
+		if (detail == BEACON_REPORT_DETAIL_ALL_FIELDS_AND_ELEMENTS ||
+		    (eids && bitfield_is_set(eids, ies[0]))) {
+			u8 eid = ies[0], elen = ies[1];
+
+			if ((eid == WLAN_EID_TIM || eid == WLAN_EID_RSN) &&
+			    elen > 4)
+				elen = 4;
+			/*
+			 * TODO: Truncate IBSS DFS element as described in
+			 * IEEE Std 802.11-2016, 9.4.2.22.7.
+			 */
+
+			if (2 + elen > buf + buf_len - pos ||
+			    2 + elen > rem_len)
+				break;
+
+			*pos++ = ies[0];
+			*pos++ = elen;
+			os_memcpy(pos, ies + 2, elen);
+			pos += elen;
+			rem_len -= 2 + elen;
+		}
+
+		ies_len -= 2 + ies[1];
+		ies += 2 + ies[1];
+	}
+
+	/* Now the length is known */
+	buf[1] = pos - buf - 2;
+	return pos - buf;
+}
+
+
+static int wpas_add_beacon_rep(struct wpa_supplicant *wpa_s,
+			       struct wpabuf **wpa_buf, struct wpa_bss *bss,
+			       u64 start, u64 parent_tsf)
+{
+	struct beacon_rep_data *data = &wpa_s->beacon_rep_data;
+	u8 *ie = (u8 *) (bss + 1);
+	size_t ie_len = bss->ie_len + bss->beacon_ie_len;
+	int ret;
+	u8 buf[2000];
+	struct rrm_measurement_beacon_report *rep;
+
+	if (os_memcmp(data->bssid, broadcast_ether_addr, ETH_ALEN) != 0 &&
+	    os_memcmp(data->bssid, bss->bssid, ETH_ALEN) != 0)
+		return 0;
+
+	if (data->ssid_len &&
+	    (data->ssid_len != bss->ssid_len ||
+	     os_memcmp(data->ssid, bss->ssid, bss->ssid_len) != 0))
+		return 0;
+
+	rep = (struct rrm_measurement_beacon_report *) buf;
+	if (wpas_get_op_chan_phy(bss->freq, ie, ie_len, &rep->op_class,
+				 &rep->channel, &rep->report_info) < 0)
+		return 0;
+
+	rep->start_time = host_to_le64(start);
+	rep->duration = host_to_le16(data->scan_params.duration);
+	rep->rcpi = rssi_to_rcpi(bss->level);
+	rep->rsni = 255; /* 255 indicates that RSNI is not available */
+	os_memcpy(rep->bssid, bss->bssid, ETH_ALEN);
+	rep->antenna_id = 0; /* unknown */
+	rep->parent_tsf = host_to_le32(parent_tsf);
+
+	ret = wpas_beacon_rep_add_frame_body(data->eids, data->report_detail,
+					     bss, rep->variable,
+					     sizeof(buf) - sizeof(*rep));
+	if (ret < 0)
+		return -1;
+
+	if (wpabuf_resize(wpa_buf,
+			  sizeof(struct rrm_measurement_report_element) +
+			  sizeof(*rep) + ret)) {
+		wpa_printf(MSG_ERROR, "RRM: Memory allocation failed");
+		return -1;
+	}
+
+	return wpas_rrm_report_elem(*wpa_buf, wpa_s->beacon_rep_data.token,
+				    MEASUREMENT_REPORT_MODE_ACCEPT,
+				    MEASURE_TYPE_BEACON, buf,
+				    ret + sizeof(*rep));
+}
+
+
+static int wpas_beacon_rep_no_results(struct wpa_supplicant *wpa_s,
+				      struct wpabuf **buf)
+{
+	if (wpabuf_resize(buf, 5)) {
+		wpa_printf(MSG_DEBUG, "RRM: Memory allocation failed");
+		return -1;
+	}
+
+	return wpas_rrm_report_elem(*buf, wpa_s->beacon_rep_data.token,
+				    MEASUREMENT_REPORT_MODE_ACCEPT,
+				    MEASURE_TYPE_BEACON, NULL, 0);
+}
+
+
+static void wpas_beacon_rep_table(struct wpa_supplicant *wpa_s,
+				  struct wpabuf **buf)
+{
+	size_t i;
+
+	for (i = 0; i < wpa_s->last_scan_res_used; i++) {
+		if (wpas_add_beacon_rep(wpa_s, buf, wpa_s->last_scan_res[i],
+					0, 0) < 0)
+			break;
+	}
+
+	if (!(*buf))
+		wpas_beacon_rep_no_results(wpa_s, buf);
+
+	wpa_hexdump_buf(MSG_DEBUG, "RRM: Radio Measurement report", *buf);
+}
+
+
+static void wpas_rrm_refuse_request(struct wpa_supplicant *wpa_s)
+{
+	struct wpabuf *buf;
+
+	buf = wpabuf_alloc(sizeof(struct rrm_measurement_beacon_report));
+	if (!buf ||
+	    wpas_rrm_report_elem(buf, wpa_s->beacon_rep_data.token,
+				 MEASUREMENT_REPORT_MODE_REJECT_REFUSED,
+				 MEASURE_TYPE_BEACON, NULL, 0)) {
+		wpa_printf(MSG_ERROR, "RRM: Memory allocation failed");
+		wpabuf_free(buf);
+		return;
+	}
+
+	wpas_rrm_send_msr_report(wpa_s, buf);
+	wpas_clear_beacon_rep_data(wpa_s);
+	wpabuf_free(buf);
+}
+
+
+static void wpas_rrm_scan_timeout(void *eloop_ctx, void *timeout_ctx)
+{
+	struct wpa_supplicant *wpa_s = eloop_ctx;
+	struct wpa_driver_scan_params *params =
+		&wpa_s->beacon_rep_data.scan_params;
+
+	if (!wpa_s->current_bss)
+		return;
+
+	if (wpa_s->scanning || wpas_p2p_in_progress(wpa_s) ||
+	    wpa_supplicant_trigger_scan(wpa_s, params))
+		wpas_rrm_refuse_request(wpa_s);
+}
+
+
+static int wpas_rm_handle_beacon_req_subelem(struct wpa_supplicant *wpa_s,
+					     struct beacon_rep_data *data,
+					     u8 sid, u8 slen, const u8 *subelem)
+{
+	u8 report_info, i;
+
+	switch (sid) {
+	case WLAN_BEACON_REQUEST_SUBELEM_SSID:
+		if (!slen) {
+			wpa_printf(MSG_DEBUG,
+				   "SSID subelement with zero length - wildcard SSID");
+			break;
+		}
+
+		if (slen > SSID_MAX_LEN) {
+			wpa_printf(MSG_DEBUG,
+				   "Invalid SSID subelement length: %u", slen);
+			return -1;
+		}
+
+		data->ssid_len = slen;
+		os_memcpy(data->ssid, subelem, data->ssid_len);
+		break;
+	case WLAN_BEACON_REQUEST_SUBELEM_INFO:
+		if (slen != 2) {
+			wpa_printf(MSG_DEBUG,
+				   "Invalid reporting information subelement length: %u",
+				   slen);
+			return -1;
+		}
+
+		report_info = subelem[0];
+		if (report_info != 0) {
+			wpa_printf(MSG_DEBUG,
+				   "reporting information=%u is not supported",
+				   report_info);
+			return 0;
+		}
+		break;
+	case WLAN_BEACON_REQUEST_SUBELEM_DETAIL:
+		if (slen != 1) {
+			wpa_printf(MSG_DEBUG,
+				   "Invalid reporting detail subelement length: %u",
+				   slen);
+			return -1;
+		}
+
+		data->report_detail = subelem[0];
+		if (data->report_detail >
+		    BEACON_REPORT_DETAIL_ALL_FIELDS_AND_ELEMENTS) {
+			wpa_printf(MSG_DEBUG, "Invalid reporting detail: %u",
+				   subelem[0]);
+			return 0;
+		}
+
+		break;
+	case WLAN_BEACON_REQUEST_SUBELEM_REQUEST:
+		if (data->report_detail !=
+		    BEACON_REPORT_DETAIL_REQUESTED_ONLY) {
+			wpa_printf(MSG_DEBUG,
+				   "Beacon request: request subelement is present but report detail is %u",
+				   data->report_detail);
+			return -1;
+		}
+
+		if (!slen) {
+			wpa_printf(MSG_DEBUG,
+				   "Invalid request subelement length: %u",
+				   slen);
+			return -1;
+		}
+
+		if (data->eids) {
+			wpa_printf(MSG_DEBUG,
+				   "Beacon Request: Request subelement appears more than once");
+			return -1;
+		}
+
+		data->eids = bitfield_alloc(255);
+		if (!data->eids) {
+			wpa_printf(MSG_DEBUG, "Failed to allocate EIDs bitmap");
+			return -1;
+		}
+
+		for (i = 0; i < slen; i++)
+			bitfield_set(data->eids, subelem[i]);
+		break;
+	case WLAN_BEACON_REQUEST_SUBELEM_AP_CHANNEL:
+		/* Skip - it will be processed when freqs are added */
+		break;
+	default:
+		wpa_printf(MSG_DEBUG,
+			   "Beacon request: Unknown subelement id %u", sid);
+		break;
+	}
+
+	return 1;
+}
+
+
+/**
+ * Returns 0 if the next element can be processed, 1 if some operation was
+ * triggered, and -1 if processing failed (i.e., the element is in invalid
+ * format or an internal error occurred).
+ */
+static int
+wpas_rm_handle_beacon_req(struct wpa_supplicant *wpa_s,
+			  u8 elem_token, int duration_mandatory,
+			  const struct rrm_measurement_beacon_request *req,
+			  size_t len, struct wpabuf **buf)
+{
+	struct beacon_rep_data *data = &wpa_s->beacon_rep_data;
+	struct wpa_driver_scan_params *params = &data->scan_params;
+	const u8 *subelems;
+	size_t elems_len;
+	u16 rand_interval;
+	u32 interval_usec;
+	u32 _rand;
+	int ret = 0, res;
+
+	if (!(wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_SUPPORT_BEACON_REPORT))
+		return 0;
+
+	if (len < sizeof(*req))
+		return -1;
+	subelems = req->variable;
+	elems_len = len - sizeof(*req);
+	rand_interval = le_to_host16(req->rand_interval);
+
+	os_memset(params, 0, sizeof(*params));
+
+	data->token = elem_token;
+
+	/* default reporting detail is all fixed length fields and all
+	 * elements */
+	data->report_detail = BEACON_REPORT_DETAIL_ALL_FIELDS_AND_ELEMENTS;
+	os_memcpy(data->bssid, req->bssid, ETH_ALEN);
+
+	while (elems_len >= 2) {
+		if (subelems[1] > elems_len - 2) {
+			wpa_printf(MSG_DEBUG,
+				   "Beacon Request: Truncated subelement");
+			ret = -1;
+			goto out;
+		}
+
+		res = wpas_rm_handle_beacon_req_subelem(
+			wpa_s, data, subelems[0], subelems[1], &subelems[2]);
+		if (res != 1) {
+			ret = res;
+			goto out;
+		}
+
+		elems_len -= 2 + subelems[1];
+		subelems += 2 + subelems[1];
+	}
+
+	if (req->mode == BEACON_REPORT_MODE_TABLE) {
+		wpas_beacon_rep_table(wpa_s, buf);
+		goto out;
+	}
+
+	params->freqs = wpas_beacon_request_freqs(
+		wpa_s, req->oper_class, req->channel,
+		req->mode == BEACON_REPORT_MODE_ACTIVE,
+		req->variable, len - sizeof(*req));
+	if (!params->freqs) {
+		wpa_printf(MSG_DEBUG, "Beacon request: No valid channels");
+		goto out;
+	}
+
+	params->duration = le_to_host16(req->duration);
+	params->duration_mandatory = duration_mandatory;
+	if (!params->duration) {
+		wpa_printf(MSG_DEBUG, "Beacon request: Duration is 0");
+		ret = -1;
+		goto out;
+	}
+
+	params->only_new_results = 1;
+
+	if (req->mode == BEACON_REPORT_MODE_ACTIVE) {
+		params->ssids[params->num_ssids].ssid = data->ssid;
+		params->ssids[params->num_ssids++].ssid_len = data->ssid_len;
+	}
+
+	if (os_get_random((u8 *) &_rand, sizeof(_rand)) < 0)
+		_rand = os_random();
+	interval_usec = (_rand % (rand_interval + 1)) * 1024;
+	eloop_register_timeout(0, interval_usec, wpas_rrm_scan_timeout, wpa_s,
+			       NULL);
+	return 1;
+out:
+	wpas_clear_beacon_rep_data(wpa_s);
+	return ret;
+}
+
+
 static int
 wpas_rrm_handle_msr_req_element(
 	struct wpa_supplicant *wpa_s,
 	const struct rrm_measurement_request_element *req,
 	struct wpabuf **buf)
 {
+	int duration_mandatory;
+
 	wpa_printf(MSG_DEBUG, "Measurement request type %d token %d",
 		   req->type, req->token);
 
@@ -446,9 +1133,17 @@ wpas_rrm_handle_msr_req_element(
 		goto reject;
 	}
 
+	duration_mandatory =
+		!!(req->mode & MEASUREMENT_REQUEST_MODE_DURATION_MANDATORY);
+
 	switch (req->type) {
 	case MEASURE_TYPE_LCI:
 		return wpas_rrm_build_lci_report(wpa_s, req, buf);
+	case MEASURE_TYPE_BEACON:
+		return wpas_rm_handle_beacon_req(wpa_s, req->token,
+						 duration_mandatory,
+						 (const void *) req->variable,
+						 req->len - 3, buf);
 	default:
 		wpa_printf(MSG_INFO,
 			   "RRM: Unsupported radio measurement type %u",
@@ -622,3 +1317,75 @@ void wpas_rrm_handle_link_measurement_request(struct wpa_supplicant *wpa_s,
 	}
 	wpabuf_free(buf);
 }
+
+
+int wpas_beacon_rep_scan_process(struct wpa_supplicant *wpa_s,
+				 struct wpa_scan_results *scan_res,
+				 struct scan_info *info)
+{
+	size_t i = 0;
+	struct wpabuf *buf = NULL;
+
+	if (!wpa_s->beacon_rep_data.token)
+		return 0;
+
+	if (!wpa_s->current_bss)
+		goto out;
+
+	/* If the measurement was aborted, don't report partial results */
+	if (info->aborted)
+		goto out;
+
+	wpa_printf(MSG_DEBUG, "RRM: TSF BSSID: " MACSTR " current BSS: " MACSTR,
+		   MAC2STR(info->scan_start_tsf_bssid),
+		   MAC2STR(wpa_s->current_bss->bssid));
+	if (os_memcmp(info->scan_start_tsf_bssid, wpa_s->current_bss->bssid,
+		      ETH_ALEN) != 0)
+		goto out;
+
+	for (i = 0; i < scan_res->num; i++) {
+		struct wpa_bss *bss =
+			wpa_bss_get_bssid(wpa_s, scan_res->res[i]->bssid);
+
+		if (!bss)
+			continue;
+
+		if (os_memcmp(scan_res->res[i]->tsf_bssid,
+			      wpa_s->current_bss->bssid, ETH_ALEN) != 0)
+			continue;
+
+		/*
+		 * Don't report results that were not received during the
+		 * current measurement.
+		 */
+		if (info->scan_start_tsf > scan_res->res[i]->parent_tsf)
+			continue;
+
+		if (wpas_add_beacon_rep(wpa_s, &buf, bss, info->scan_start_tsf,
+					scan_res->res[i]->parent_tsf) < 0)
+			break;
+	}
+
+	if (!buf && wpas_beacon_rep_no_results(wpa_s, &buf))
+		goto out;
+
+	wpa_hexdump_buf(MSG_DEBUG, "RRM: Radio Measurement report", buf);
+
+	wpas_rrm_send_msr_report(wpa_s, buf);
+	wpabuf_free(buf);
+
+out:
+	wpas_clear_beacon_rep_data(wpa_s);
+	return 1;
+}
+
+
+void wpas_clear_beacon_rep_data(struct wpa_supplicant *wpa_s)
+{
+	struct beacon_rep_data *data = &wpa_s->beacon_rep_data;
+
+	eloop_cancel_timeout(wpas_rrm_scan_timeout, wpa_s, NULL);
+	bitfield_free(data->eids);
+	os_free(data->scan_params.freqs);
+	os_memset(data, 0, sizeof(*data));
+}

wpa_supplicant/sme.c

@@ -187,6 +187,11 @@ static void sme_auth_handle_rrm(struct wpa_supplicant *wpa_s,
 	if (wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_TX_POWER_INSERTION)
 		*pos |= WLAN_RRM_CAPS_LINK_MEASUREMENT;
 
+	if (wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_SUPPORT_BEACON_REPORT)
+		*pos |= WLAN_RRM_CAPS_BEACON_REPORT_PASSIVE |
+			WLAN_RRM_CAPS_BEACON_REPORT_ACTIVE |
+			WLAN_RRM_CAPS_BEACON_REPORT_TABLE;
+
 	if (wpa_s->lci)
 		pos[1] |= WLAN_RRM_CAPS_LCI_MEASUREMENT;
 

wpa_supplicant/wpa_supplicant.c

@@ -585,6 +585,7 @@ static void wpa_supplicant_cleanup(struct wpa_supplicant *wpa_s)
 
 	wpabuf_free(wpa_s->lci);
 	wpa_s->lci = NULL;
+	wpas_clear_beacon_rep_data(wpa_s);
 }
 
 

wpa_supplicant/wpa_supplicant_i.h

@@ -9,6 +9,7 @@
 #ifndef WPA_SUPPLICANT_I_H
 #define WPA_SUPPLICANT_I_H
 
+#include "utils/bitfield.h"
 #include "utils/list.h"
 #include "common/defs.h"
 #include "common/sae.h"
@@ -449,6 +450,17 @@ struct wpa_bss_tmp_disallowed {
 	struct os_reltime disallowed_until;
 };
 
+struct beacon_rep_data {
+	u8 token;
+	struct wpa_driver_scan_params scan_params;
+	u8 ssid[SSID_MAX_LEN];
+	size_t ssid_len;
+	u8 bssid[ETH_ALEN];
+	enum beacon_report_detail report_detail;
+	struct bitfield *eids;
+};
+
+
 /**
  * struct wpa_supplicant - Internal data for wpa_supplicant interface
  *
@@ -1048,6 +1060,7 @@ struct wpa_supplicant {
 	u8 last_tspecs_count;
 
 	struct rrm_data rrm;
+	struct beacon_rep_data beacon_rep_data;
 
 #ifdef CONFIG_FST
 	struct fst_iface *fst;
@@ -1199,6 +1212,10 @@ void wpas_rrm_handle_link_measurement_request(struct wpa_supplicant *wpa_s,
 					      const u8 *src,
 					      const u8 *frame, size_t len,
 					      int rssi);
+int wpas_beacon_rep_scan_process(struct wpa_supplicant *wpa_s,
+				 struct wpa_scan_results *scan_res,
+				 struct scan_info *info);
+void wpas_clear_beacon_rep_data(struct wpa_supplicant *wpa_s);
 
 
 /* MBO functions */