X-Git-Url: http://www.project-moonshot.org/gitweb/?a=blobdiff_plain;f=wpa_supplicant%2Fmbo.c;h=c37d547d3766174d9e54913b4cd538a16fcc1fe8;hb=0dbe22be3d6b1857a8f5183c5e309130b87b0655;hp=369232e7e404cb60e0311ebce7c7b3abe093bf71;hpb=92c6e2e3a92906083d11471ea1b2965758068d8d;p=mech_eap.git

diff --git a/wpa_supplicant/mbo.c b/wpa_supplicant/mbo.c
index 369232e..c37d547 100644
--- a/wpa_supplicant/mbo.c
+++ b/wpa_supplicant/mbo.c
@@ -36,6 +36,24 @@ static int wpas_mbo_validate_non_pref_chan(u8 oper_class, u8 chan, u8 reason)
 }
 
 
+const u8 * wpas_mbo_get_bss_attr(struct wpa_bss *bss, enum mbo_attr_id attr)
+{
+	const u8 *mbo, *end;
+
+	if (!bss)
+		return NULL;
+
+	mbo = wpa_bss_get_vendor_ie(bss, MBO_IE_VENDOR_TYPE);
+	if (!mbo)
+		return NULL;
+
+	end = mbo + 2 + mbo[1];
+	mbo += MBO_IE_HEADER;
+
+	return get_ie(mbo, end - mbo, attr);
+}
+
+
 static void wpas_mbo_non_pref_chan_attr_body(struct wpa_supplicant *wpa_s,
 					     struct wpabuf *mbo,
 					     u8 start, u8 end)
@@ -68,15 +86,40 @@ static void wpas_mbo_non_pref_chan_attr(struct wpa_supplicant *wpa_s,
 }
 
 
-static void wpas_mbo_non_pref_chan_attrs(struct wpa_supplicant *wpa_s,
-					 struct wpabuf *mbo)
+static void wpas_mbo_non_pref_chan_subelem_hdr(struct wpabuf *mbo, u8 len)
+{
+	wpabuf_put_u8(mbo, WLAN_EID_VENDOR_SPECIFIC);
+	wpabuf_put_u8(mbo, len); /* Length */
+	wpabuf_put_be24(mbo, OUI_WFA);
+	wpabuf_put_u8(mbo, MBO_ATTR_ID_NON_PREF_CHAN_REPORT);
+}
+
+
+static void wpas_mbo_non_pref_chan_subelement(struct wpa_supplicant *wpa_s,
+					      struct wpabuf *mbo, u8 start,
+					      u8 end)
+{
+	size_t size = end - start + 8;
+
+	if (size + 2 > wpabuf_tailroom(mbo))
+		return;
+
+	wpas_mbo_non_pref_chan_subelem_hdr(mbo, size);
+	wpas_mbo_non_pref_chan_attr_body(wpa_s, mbo, start, end);
+}
+
 
+static void wpas_mbo_non_pref_chan_attrs(struct wpa_supplicant *wpa_s,
+					 struct wpabuf *mbo, int subelement)
 {
 	u8 i, start = 0;
 	struct wpa_mbo_non_pref_channel *start_pref;
 
-	if (!wpa_s->non_pref_chan || !wpa_s->non_pref_chan_num)
+	if (!wpa_s->non_pref_chan || !wpa_s->non_pref_chan_num) {
+		if (subelement)
+			wpas_mbo_non_pref_chan_subelem_hdr(mbo, 4);
 		return;
+	}
 	start_pref = &wpa_s->non_pref_chan[0];
 
 	for (i = 1; i <= wpa_s->non_pref_chan_num; i++) {
@@ -89,7 +132,12 @@ static void wpas_mbo_non_pref_chan_attrs(struct wpa_supplicant *wpa_s,
 		    non_pref->reason != start_pref->reason ||
 		    non_pref->reason_detail != start_pref->reason_detail ||
 		    non_pref->preference != start_pref->preference) {
-			wpas_mbo_non_pref_chan_attr(wpa_s, mbo, start, i);
+			if (subelement)
+				wpas_mbo_non_pref_chan_subelement(wpa_s, mbo,
+								  start, i);
+			else
+				wpas_mbo_non_pref_chan_attr(wpa_s, mbo, start,
+							    i);
 
 			if (!non_pref)
 				return;
@@ -106,8 +154,7 @@ int wpas_mbo_ie(struct wpa_supplicant *wpa_s, u8 *buf, size_t len)
 	struct wpabuf *mbo;
 	int res;
 
-	if (!wpa_s->non_pref_chan || !wpa_s->non_pref_chan_num ||
-	    len < MBO_IE_HEADER + 7)
+	if (len < MBO_IE_HEADER + 3 + 7)
 		return 0;
 
 	/* Leave room for the MBO IE header */
@@ -116,7 +163,15 @@ int wpas_mbo_ie(struct wpa_supplicant *wpa_s, u8 *buf, size_t len)
 		return 0;
 
 	/* Add non-preferred channels attribute */
-	wpas_mbo_non_pref_chan_attrs(wpa_s, mbo);
+	wpas_mbo_non_pref_chan_attrs(wpa_s, mbo, 0);
+
+	/*
+	 * Send cellular capabilities attribute even if AP does not advertise
+	 * cellular capabilities.
+	 */
+	wpabuf_put_u8(mbo, MBO_ATTR_ID_CELL_DATA_CAPA);
+	wpabuf_put_u8(mbo, 1);
+	wpabuf_put_u8(mbo, wpa_s->conf->mbo_cell_capa);
 
 	res = mbo_add_ie(buf, len, wpabuf_head_u8(mbo), wpabuf_len(mbo));
 	if (!res)
@@ -127,6 +182,61 @@ int wpas_mbo_ie(struct wpa_supplicant *wpa_s, u8 *buf, size_t len)
 }
 
 
+static void wpas_mbo_send_wnm_notification(struct wpa_supplicant *wpa_s,
+					   const u8 *data, size_t len)
+{
+	struct wpabuf *buf;
+	int res;
+
+	/*
+	 * Send WNM-Notification Request frame only in case of a change in
+	 * non-preferred channels list during association, if the AP supports
+	 * MBO.
+	 */
+	if (wpa_s->wpa_state != WPA_COMPLETED || !wpa_s->current_bss ||
+	    !wpa_bss_get_vendor_ie(wpa_s->current_bss, MBO_IE_VENDOR_TYPE))
+		return;
+
+	buf = wpabuf_alloc(4 + len);
+	if (!buf)
+		return;
+
+	wpabuf_put_u8(buf, WLAN_ACTION_WNM);
+	wpabuf_put_u8(buf, WNM_NOTIFICATION_REQ);
+	wpa_s->mbo_wnm_token++;
+	if (wpa_s->mbo_wnm_token == 0)
+		wpa_s->mbo_wnm_token++;
+	wpabuf_put_u8(buf, wpa_s->mbo_wnm_token);
+	wpabuf_put_u8(buf, WLAN_EID_VENDOR_SPECIFIC); /* Type */
+
+	wpabuf_put_data(buf, data, len);
+
+	res = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
+				  wpa_s->own_addr, wpa_s->bssid,
+				  wpabuf_head(buf), wpabuf_len(buf), 0);
+	if (res < 0)
+		wpa_printf(MSG_DEBUG,
+			   "Failed to send WNM-Notification Request frame with non-preferred channel list");
+
+	wpabuf_free(buf);
+}
+
+
+static void wpas_mbo_non_pref_chan_changed(struct wpa_supplicant *wpa_s)
+{
+	struct wpabuf *buf;
+
+	buf = wpabuf_alloc(512);
+	if (!buf)
+		return;
+
+	wpas_mbo_non_pref_chan_attrs(wpa_s, buf, 1);
+	wpas_mbo_send_wnm_notification(wpa_s, wpabuf_head_u8(buf),
+				       wpabuf_len(buf));
+	wpabuf_free(buf);
+}
+
+
 static int wpa_non_pref_chan_is_eq(struct wpa_mbo_non_pref_channel *a,
 				   struct wpa_mbo_non_pref_channel *b)
 {
@@ -252,6 +362,7 @@ update:
 	os_free(wpa_s->non_pref_chan);
 	wpa_s->non_pref_chan = chans;
 	wpa_s->non_pref_chan_num = num;
+	wpas_mbo_non_pref_chan_changed(wpa_s);
 
 	return 0;
 
@@ -260,3 +371,401 @@ fail:
 	os_free(cmd);
 	return -1;
 }
+
+
+void wpas_mbo_scan_ie(struct wpa_supplicant *wpa_s, struct wpabuf *ie)
+{
+	wpabuf_put_u8(ie, WLAN_EID_VENDOR_SPECIFIC);
+	wpabuf_put_u8(ie, 7);
+	wpabuf_put_be24(ie, OUI_WFA);
+	wpabuf_put_u8(ie, MBO_OUI_TYPE);
+
+	wpabuf_put_u8(ie, MBO_ATTR_ID_CELL_DATA_CAPA);
+	wpabuf_put_u8(ie, 1);
+	wpabuf_put_u8(ie, wpa_s->conf->mbo_cell_capa);
+}
+
+
+enum chan_allowed {
+	NOT_ALLOWED, ALLOWED
+};
+
+static enum chan_allowed allow_channel(struct hostapd_hw_modes *mode, u8 chan,
+				       unsigned int *flags)
+{
+	int i;
+
+	for (i = 0; i < mode->num_channels; i++) {
+		if (mode->channels[i].chan == chan)
+			break;
+	}
+
+	if (i == mode->num_channels ||
+	    (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED))
+		return NOT_ALLOWED;
+
+	if (flags)
+		*flags = mode->channels[i].flag;
+
+	return ALLOWED;
+}
+
+
+static int get_center_80mhz(struct hostapd_hw_modes *mode, u8 channel)
+{
+	u8 center_channels[] = {42, 58, 106, 122, 138, 155};
+	size_t i;
+
+	if (mode->mode != HOSTAPD_MODE_IEEE80211A)
+		return 0;
+
+	for (i = 0; i < ARRAY_SIZE(center_channels); i++) {
+		/*
+		 * In 80 MHz, the bandwidth "spans" 12 channels (e.g., 36-48),
+		 * so the center channel is 6 channels away from the start/end.
+		 */
+		if (channel >= center_channels[i] - 6 &&
+		    channel <= center_channels[i] + 6)
+			return center_channels[i];
+	}
+
+	return 0;
+}
+
+
+static enum chan_allowed verify_80mhz(struct hostapd_hw_modes *mode, u8 channel)
+{
+	u8 center_chan;
+	unsigned int i;
+
+	center_chan = get_center_80mhz(mode, channel);
+	if (!center_chan)
+		return NOT_ALLOWED;
+
+	/* check all the channels are available */
+	for (i = 0; i < 4; i++) {
+		unsigned int flags;
+		u8 adj_chan = center_chan - 6 + i * 4;
+
+		if (allow_channel(mode, adj_chan, &flags) == NOT_ALLOWED)
+			return NOT_ALLOWED;
+
+		if ((i == 0 && !(flags & HOSTAPD_CHAN_VHT_10_70)) ||
+		    (i == 1 && !(flags & HOSTAPD_CHAN_VHT_30_50)) ||
+		    (i == 2 && !(flags & HOSTAPD_CHAN_VHT_50_30)) ||
+		    (i == 3 && !(flags & HOSTAPD_CHAN_VHT_70_10)))
+			return NOT_ALLOWED;
+	}
+
+	return ALLOWED;
+}
+
+
+static int get_center_160mhz(struct hostapd_hw_modes *mode, u8 channel)
+{
+	u8 center_channels[] = { 50, 114 };
+	unsigned int i;
+
+	if (mode->mode != HOSTAPD_MODE_IEEE80211A)
+		return 0;
+
+	for (i = 0; i < ARRAY_SIZE(center_channels); i++) {
+		/*
+		 * In 160 MHz, the bandwidth "spans" 28 channels (e.g., 36-64),
+		 * so the center channel is 14 channels away from the start/end.
+		 */
+		if (channel >= center_channels[i] - 14 &&
+		    channel <= center_channels[i] + 14)
+			return center_channels[i];
+	}
+
+	return 0;
+}
+
+
+static enum chan_allowed verify_160mhz(struct hostapd_hw_modes *mode,
+				       u8 channel)
+{
+	u8 center_chan;
+	unsigned int i;
+
+	center_chan = get_center_160mhz(mode, channel);
+	if (!center_chan)
+		return NOT_ALLOWED;
+
+	/* Check all the channels are available */
+	for (i = 0; i < 8; i++) {
+		unsigned int flags;
+		u8 adj_chan = center_chan - 14 + i * 4;
+
+		if (allow_channel(mode, adj_chan, &flags) == NOT_ALLOWED)
+			return NOT_ALLOWED;
+
+		if ((i == 0 && !(flags & HOSTAPD_CHAN_VHT_10_150)) ||
+		    (i == 1 && !(flags & HOSTAPD_CHAN_VHT_30_130)) ||
+		    (i == 2 && !(flags & HOSTAPD_CHAN_VHT_50_110)) ||
+		    (i == 3 && !(flags & HOSTAPD_CHAN_VHT_70_90)) ||
+		    (i == 4 && !(flags & HOSTAPD_CHAN_VHT_90_70)) ||
+		    (i == 5 && !(flags & HOSTAPD_CHAN_VHT_110_50)) ||
+		    (i == 6 && !(flags & HOSTAPD_CHAN_VHT_130_30)) ||
+		    (i == 7 && !(flags & HOSTAPD_CHAN_VHT_150_10)))
+			return NOT_ALLOWED;
+	}
+
+	return ALLOWED;
+}
+
+
+static enum chan_allowed verify_channel(struct hostapd_hw_modes *mode,
+					u8 channel, u8 bw)
+{
+	unsigned int flag = 0;
+	enum chan_allowed res, res2;
+
+	res2 = res = allow_channel(mode, channel, &flag);
+	if (bw == BW40MINUS) {
+		if (!(flag & HOSTAPD_CHAN_HT40MINUS))
+			return NOT_ALLOWED;
+		res2 = allow_channel(mode, channel - 4, NULL);
+	} else if (bw == BW40PLUS) {
+		if (!(flag & HOSTAPD_CHAN_HT40PLUS))
+			return NOT_ALLOWED;
+		res2 = allow_channel(mode, channel + 4, NULL);
+	} else if (bw == BW80) {
+		res2 = verify_80mhz(mode, channel);
+	} else if (bw == BW160) {
+		res2 = verify_160mhz(mode, channel);
+	}
+
+	if (res == NOT_ALLOWED || res2 == NOT_ALLOWED)
+		return NOT_ALLOWED;
+
+	return ALLOWED;
+}
+
+
+static int wpas_op_class_supported(struct wpa_supplicant *wpa_s,
+				   const struct oper_class_map *op_class)
+{
+	int chan;
+	size_t i;
+	struct hostapd_hw_modes *mode;
+
+	mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, op_class->mode);
+	if (!mode)
+		return 0;
+
+	if (op_class->op_class == 128 || op_class->op_class == 130) {
+		u8 channels[] = { 42, 58, 106, 122, 138, 155 };
+
+		for (i = 0; i < ARRAY_SIZE(channels); i++) {
+			if (verify_channel(mode, channels[i], op_class->bw) ==
+			    NOT_ALLOWED)
+				return 0;
+		}
+
+		return 1;
+	}
+
+	if (op_class->op_class == 129) {
+		if (verify_channel(mode, 50, op_class->bw) == NOT_ALLOWED ||
+		    verify_channel(mode, 114, op_class->bw) == NOT_ALLOWED)
+			return 0;
+
+		return 1;
+	}
+
+	for (chan = op_class->min_chan; chan <= op_class->max_chan;
+	     chan += op_class->inc) {
+		if (verify_channel(mode, chan, op_class->bw) == NOT_ALLOWED)
+			return 0;
+	}
+
+	return 1;
+}
+
+
+int wpas_mbo_supp_op_class_ie(struct wpa_supplicant *wpa_s, int freq, u8 *pos,
+			      size_t len)
+{
+	struct wpabuf *buf;
+	u8 op, current, chan;
+	u8 *ie_len;
+	int res;
+
+	/*
+	 * Assume 20 MHz channel for now.
+	 * TODO: Use the secondary channel and VHT channel width that will be
+	 * used after association.
+	 */
+	if (ieee80211_freq_to_channel_ext(freq, 0, VHT_CHANWIDTH_USE_HT,
+					  &current, &chan) == NUM_HOSTAPD_MODES)
+		return 0;
+
+	/*
+	 * Need 3 bytes for EID, length, and current operating class, plus
+	 * 1 byte for every other supported operating class.
+	 */
+	buf = wpabuf_alloc(global_op_class_size + 3);
+	if (!buf)
+		return 0;
+
+	wpabuf_put_u8(buf, WLAN_EID_SUPPORTED_OPERATING_CLASSES);
+	/* Will set the length later, putting a placeholder */
+	ie_len = wpabuf_put(buf, 1);
+	wpabuf_put_u8(buf, current);
+
+	for (op = 0; global_op_class[op].op_class; op++) {
+		if (wpas_op_class_supported(wpa_s, &global_op_class[op]))
+			wpabuf_put_u8(buf, global_op_class[op].op_class);
+	}
+
+	*ie_len = wpabuf_len(buf) - 2;
+	if (*ie_len < 2 || wpabuf_len(buf) > len) {
+		wpa_printf(MSG_ERROR,
+			   "Failed to add supported operating classes IE");
+		res = 0;
+	} else {
+		os_memcpy(pos, wpabuf_head(buf), wpabuf_len(buf));
+		res = wpabuf_len(buf);
+		wpa_hexdump_buf(MSG_DEBUG,
+				"MBO: Added supported operating classes IE",
+				buf);
+	}
+
+	wpabuf_free(buf);
+	return res;
+}
+
+
+void wpas_mbo_ie_trans_req(struct wpa_supplicant *wpa_s, const u8 *mbo_ie,
+			   size_t len)
+{
+	const u8 *pos, *cell_pref = NULL, *reason = NULL;
+	u8 id, elen;
+	u16 disallowed_sec = 0;
+
+	if (len <= 4 || WPA_GET_BE24(mbo_ie) != OUI_WFA ||
+	    mbo_ie[3] != MBO_OUI_TYPE)
+		return;
+
+	pos = mbo_ie + 4;
+	len -= 4;
+
+	while (len >= 2) {
+		id = *pos++;
+		elen = *pos++;
+		len -= 2;
+
+		if (elen > len)
+			goto fail;
+
+		switch (id) {
+		case MBO_ATTR_ID_CELL_DATA_PREF:
+			if (elen != 1)
+				goto fail;
+
+			if (wpa_s->conf->mbo_cell_capa ==
+			    MBO_CELL_CAPA_AVAILABLE)
+				cell_pref = pos;
+			else
+				wpa_printf(MSG_DEBUG,
+					   "MBO: Station does not support Cellular data connection");
+			break;
+		case MBO_ATTR_ID_TRANSITION_REASON:
+			if (elen != 1)
+				goto fail;
+
+			reason = pos;
+			break;
+		case MBO_ATTR_ID_ASSOC_RETRY_DELAY:
+			if (elen != 2)
+				goto fail;
+
+			if (wpa_s->wnm_mode &
+			    WNM_BSS_TM_REQ_BSS_TERMINATION_INCLUDED) {
+				wpa_printf(MSG_DEBUG,
+					   "MBO: Unexpected association retry delay, BSS is terminating");
+				goto fail;
+			} else if (wpa_s->wnm_mode &
+				   WNM_BSS_TM_REQ_DISASSOC_IMMINENT) {
+				disallowed_sec = WPA_GET_LE16(pos);
+			} else {
+				wpa_printf(MSG_DEBUG,
+					   "MBO: Association retry delay attribute not in disassoc imminent mode");
+			}
+
+			break;
+		case MBO_ATTR_ID_AP_CAPA_IND:
+		case MBO_ATTR_ID_NON_PREF_CHAN_REPORT:
+		case MBO_ATTR_ID_CELL_DATA_CAPA:
+		case MBO_ATTR_ID_ASSOC_DISALLOW:
+		case MBO_ATTR_ID_TRANSITION_REJECT_REASON:
+			wpa_printf(MSG_DEBUG,
+				   "MBO: Attribute %d should not be included in BTM Request frame",
+				   id);
+			break;
+		default:
+			wpa_printf(MSG_DEBUG, "MBO: Unknown attribute id %u",
+				   id);
+			return;
+		}
+
+		pos += elen;
+		len -= elen;
+	}
+
+	if (cell_pref)
+		wpa_msg(wpa_s, MSG_INFO, MBO_CELL_PREFERENCE "preference=%u",
+			*cell_pref);
+
+	if (reason)
+		wpa_msg(wpa_s, MSG_INFO, MBO_TRANSITION_REASON "reason=%u",
+			*reason);
+
+	if (disallowed_sec && wpa_s->current_bss)
+		wpa_bss_tmp_disallow(wpa_s, wpa_s->current_bss->bssid,
+				     disallowed_sec);
+
+	return;
+fail:
+	wpa_printf(MSG_DEBUG, "MBO IE parsing failed (id=%u len=%u left=%zu)",
+		   id, elen, len);
+}
+
+
+size_t wpas_mbo_ie_bss_trans_reject(struct wpa_supplicant *wpa_s, u8 *pos,
+				    size_t len,
+				    enum mbo_transition_reject_reason reason)
+{
+	u8 reject_attr[3];
+
+	reject_attr[0] = MBO_ATTR_ID_TRANSITION_REJECT_REASON;
+	reject_attr[1] = 1;
+	reject_attr[2] = reason;
+
+	return mbo_add_ie(pos, len, reject_attr, sizeof(reject_attr));
+}
+
+
+void wpas_mbo_update_cell_capa(struct wpa_supplicant *wpa_s, u8 mbo_cell_capa)
+{
+	u8 cell_capa[7];
+
+	if (wpa_s->conf->mbo_cell_capa == mbo_cell_capa) {
+		wpa_printf(MSG_DEBUG,
+			   "MBO: Cellular capability already set to %u",
+			   mbo_cell_capa);
+		return;
+	}
+
+	wpa_s->conf->mbo_cell_capa = mbo_cell_capa;
+
+	cell_capa[0] = WLAN_EID_VENDOR_SPECIFIC;
+	cell_capa[1] = 5; /* Length */
+	WPA_PUT_BE24(cell_capa + 2, OUI_WFA);
+	cell_capa[5] = MBO_ATTR_ID_CELL_DATA_CAPA;
+	cell_capa[6] = mbo_cell_capa;
+
+	wpas_mbo_send_wnm_notification(wpa_s, cell_capa, 7);
+}