diff --git a/wpa_supplicant/wmm_ac.c b/wpa_supplicant/wmm_ac.c
index e418da3..789c835 100644
--- a/wpa_supplicant/wmm_ac.c
+++ b/wpa_supplicant/wmm_ac.c
@@ -13,6 +13,261 @@
 #include "driver_i.h"
 #include "wmm_ac.h"
 #include "common/ieee802_11_common.h"
+#include "bss.h"
+
+
+static const enum wmm_ac up_to_ac[8] = {
+	WMM_AC_BK,
+	WMM_AC_BE,
+	WMM_AC_BE,
+	WMM_AC_BK,
+	WMM_AC_VI,
+	WMM_AC_VI,
+	WMM_AC_VO,
+	WMM_AC_VO
+};
+
+static inline u8 wmm_ac_get_tsid(const struct wmm_tspec_element *tspec)
+{
+	return (tspec->ts_info[0] >> 1) & 0x0f;
+}
+
+static int wmm_ac_send_addts_request(struct wpa_supplicant *wpa_s,
+				     const struct wmm_ac_addts_request *req)
+{
+	struct wpabuf *buf;
+	int ret;
+
+	wpa_printf(MSG_DEBUG, "Sending ADDTS Request to " MACSTR,
+		   MAC2STR(req->address));
+
+	/* category + action code + dialog token + status + sizeof(tspec) */
+	buf = wpabuf_alloc(4 + sizeof(req->tspec));
+	if (!buf) {
+		wpa_printf(MSG_ERROR, "WMM AC: allocation error");
+		return -1;
+	}
+
+	wpabuf_put_u8(buf, WLAN_ACTION_WMM);
+	wpabuf_put_u8(buf, WMM_ACTION_CODE_ADDTS_REQ);
+	wpabuf_put_u8(buf, req->dialog_token);
+	wpabuf_put_u8(buf, 0); /* status code */
+	wpabuf_put_data(buf, &req->tspec, sizeof(req->tspec));
+
+	ret = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, req->address,
+				wpa_s->own_addr, wpa_s->bssid,
+				wpabuf_head(buf), wpabuf_len(buf), 0);
+	if (ret)
+		wpa_printf(MSG_WARNING,
+			   "WMM AC: Failed to send ADDTS Request");
+
+	wpabuf_free(buf);
+	return ret;
+}
+
+
+static int wmm_ac_send_delts(struct wpa_supplicant *wpa_s,
+			     const struct wmm_tspec_element *tspec,
+			     const u8 *address)
+{
+	struct wpabuf *buf;
+	int ret;
+
+	/* category + action code + dialog token + status + sizeof(tspec) */
+	buf = wpabuf_alloc(4 + sizeof(*tspec));
+	if (!buf)
+		return -1;
+
+	wpa_printf(MSG_DEBUG, "Sending DELTS to " MACSTR, MAC2STR(address));
+
+	/* category + action code + dialog token + status + sizeof(tspec) */
+	wpabuf_put_u8(buf, WLAN_ACTION_WMM);
+	wpabuf_put_u8(buf, WMM_ACTION_CODE_DELTS);
+	wpabuf_put_u8(buf, 0); /* Dialog Token (not used) */
+	wpabuf_put_u8(buf, 0); /* Status Code (not used) */
+	wpabuf_put_data(buf, tspec, sizeof(*tspec));
+
+	ret = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, address,
+				  wpa_s->own_addr, wpa_s->bssid,
+				  wpabuf_head(buf), wpabuf_len(buf), 0);
+	if (ret)
+		wpa_printf(MSG_WARNING, "Failed to send DELTS frame");
+
+	wpabuf_free(buf);
+	return ret;
+}
+
+
+/* return the ac using the given tspec tid */
+static int wmm_ac_find_tsid(struct wpa_supplicant *wpa_s, u8 tsid,
+			    enum ts_dir_idx *dir)
+{
+	int ac;
+	enum ts_dir_idx idx;
+
+	for (ac = 0; ac < WMM_AC_NUM; ac++)
+		for (idx = 0; idx < TS_DIR_IDX_COUNT; idx++)
+			if (wpa_s->tspecs[ac][idx] &&
+			    wmm_ac_get_tsid(wpa_s->tspecs[ac][idx]) == tsid) {
+				if (dir)
+					*dir = idx;
+				return ac;
+			}
+	return -1;
+}
+
+
+static struct wmm_ac_addts_request *
+wmm_ac_build_addts_req(struct wpa_supplicant *wpa_s,
+		       const struct wmm_ac_ts_setup_params *params,
+		       const u8 *address)
+{
+	struct wmm_ac_addts_request *addts_req;
+	struct wmm_tspec_element *tspec;
+	u8 ac = up_to_ac[params->user_priority];
+	u8 uapsd = wpa_s->wmm_ac_assoc_info->ac_params[ac].uapsd;
+
+	addts_req = os_zalloc(sizeof(*addts_req));
+	if (!addts_req)
+		return NULL;
+
+	tspec = &addts_req->tspec;
+	os_memcpy(addts_req->address, address, ETH_ALEN);
+
+	/* The dialog token cannot be zero */
+	if (++wpa_s->wmm_ac_last_dialog_token == 0)
+		wpa_s->wmm_ac_last_dialog_token++;
+
+	addts_req->dialog_token = wpa_s->wmm_ac_last_dialog_token;
+	tspec->eid = WLAN_EID_VENDOR_SPECIFIC;
+	tspec->length = sizeof(*tspec) - 2; /* reduce eid and length */
+	tspec->oui[0] = 0x00;
+	tspec->oui[1] = 0x50;
+	tspec->oui[2] = 0xf2;
+	tspec->oui_type = WMM_OUI_TYPE;
+	tspec->oui_subtype = WMM_OUI_SUBTYPE_TSPEC_ELEMENT;
+	tspec->version = WMM_VERSION;
+
+	tspec->ts_info[0] = params->tsid << 1;
+	tspec->ts_info[0] |= params->direction << 5;
+	tspec->ts_info[0] |= WMM_AC_ACCESS_POLICY_EDCA << 7;
+	tspec->ts_info[1] = uapsd << 2;
+	tspec->ts_info[1] |= params->user_priority << 3;
+	tspec->ts_info[2] = 0;
+
+	tspec->nominal_msdu_size = host_to_le16(params->nominal_msdu_size);
+	if (params->fixed_nominal_msdu)
+		tspec->nominal_msdu_size |=
+			host_to_le16(WMM_AC_FIXED_MSDU_SIZE);
+
+	tspec->mean_data_rate = host_to_le32(params->mean_data_rate);
+	tspec->minimum_phy_rate = host_to_le32(params->minimum_phy_rate);
+	tspec->surplus_bandwidth_allowance =
+			host_to_le16(params->surplus_bandwidth_allowance);
+
+	return addts_req;
+}
+
+static int param_in_range(const char *name, long value,
+			  long min_val, long max_val)
+{
+	if (value < min_val || (max_val >= 0 && value > max_val)) {
+		wpa_printf(MSG_DEBUG,
+			   "WMM AC: param %s (%ld) is out of range (%ld-%ld)",
+			   name, value, min_val, max_val);
+		return 0;
+	}
+
+	return 1;
+}
+
+static int wmm_ac_should_replace_ts(struct wpa_supplicant *wpa_s,
+				    u8 tsid, u8 ac, u8 dir)
+{
+	enum ts_dir_idx idx;
+	int cur_ac, existing_ts = 0, replace_ts = 0;
+
+	cur_ac = wmm_ac_find_tsid(wpa_s, tsid, &idx);
+	if (cur_ac >= 0) {
+		if (cur_ac != ac) {
+			wpa_printf(MSG_DEBUG,
+				   "WMM AC: TSID %i already exists on different ac (%d)",
+				   tsid, cur_ac);
+			return -1;
+		}
+
+		/* same tsid - this tspec will replace the current one */
+		replace_ts |= BIT(idx);
+	}
+
+	for (idx = 0; idx < TS_DIR_IDX_COUNT; idx++)
+		if (wpa_s->tspecs[ac][idx])
+			existing_ts |= BIT(idx);
+
+	switch (dir) {
+	case WMM_AC_DIR_UPLINK:
+		/* replace existing uplink/bidi tspecs */
+		replace_ts |= existing_ts & (BIT(TS_DIR_IDX_UPLINK) |
+					     BIT(TS_DIR_IDX_BIDI));
+		break;
+	case WMM_AC_DIR_DOWNLINK:
+		/* replace existing downlink/bidi tspecs */
+		replace_ts |= existing_ts & (BIT(TS_DIR_IDX_DOWNLINK) |
+					     BIT(TS_DIR_IDX_BIDI));
+		break;
+	case WMM_AC_DIR_BIDIRECTIONAL:
+		/* replace all existing tspecs */
+		replace_ts |= existing_ts;
+		break;
+	default:
+		return -1;
+	}
+	return replace_ts;
+}
+
+static int wmm_ac_ts_req_is_valid(struct wpa_supplicant *wpa_s,
+				  const struct wmm_ac_ts_setup_params *params)
+{
+	enum wmm_ac req_ac;
+
+#define PARAM_IN_RANGE(field, min_value, max_value) \
+	param_in_range(#field, params->field, min_value, max_value)
+
+	if (!PARAM_IN_RANGE(tsid, 0, WMM_AC_MAX_TID) ||
+	    !PARAM_IN_RANGE(user_priority, 0, WMM_AC_MAX_USER_PRIORITY) ||
+	    !PARAM_IN_RANGE(nominal_msdu_size, 1, WMM_AC_MAX_NOMINAL_MSDU) ||
+	    !PARAM_IN_RANGE(mean_data_rate, 1, -1) ||
+	    !PARAM_IN_RANGE(minimum_phy_rate, 1, -1) ||
+	    !PARAM_IN_RANGE(surplus_bandwidth_allowance, WMM_AC_MIN_SBA_UNITY,
+			    -1))
+		return 0;
+
+#undef PARAM_IN_RANGE
+
+	if (!(params->direction == WMM_TSPEC_DIRECTION_UPLINK ||
+	      params->direction == WMM_TSPEC_DIRECTION_DOWNLINK ||
+	      params->direction == WMM_TSPEC_DIRECTION_BI_DIRECTIONAL)) {
+		wpa_printf(MSG_DEBUG, "WMM AC: invalid TS direction: %d",
+			   params->direction);
+		return 0;
+	}
+
+	req_ac = up_to_ac[params->user_priority];
+
+	/* Requested accesss category must have acm */
+	if (!wpa_s->wmm_ac_assoc_info->ac_params[req_ac].acm) {
+		wpa_printf(MSG_DEBUG, "WMM AC: AC %d is not acm",
+			   req_ac);
+		return 0;
+	}
+
+	if (wmm_ac_should_replace_ts(wpa_s, params->tsid, req_ac,
+				     params->direction) < 0)
+		return 0;
+
+	return 1;
+}
+
 
 static struct wmm_ac_assoc_data *
 wmm_ac_process_param_elem(struct wpa_supplicant *wpa_s, const u8 *ies,
@@ -80,6 +335,9 @@ static int wmm_ac_init(struct wpa_supplicant *wpa_s, const u8 *ies,
 		return -1;
 	}
 
+	os_memset(wpa_s->tspecs, 0, sizeof(wpa_s->tspecs));
+	wpa_s->wmm_ac_last_dialog_token = 0;
+
 	assoc_data = wmm_ac_process_param_elem(wpa_s, ies, ies_len);
 	if (!assoc_data)
 		return -1;
@@ -95,8 +353,30 @@ static int wmm_ac_init(struct wpa_supplicant *wpa_s, const u8 *ies,
 	return 0;
 }
 
+static void wmm_ac_del_ts(struct wpa_supplicant *wpa_s,
+			  u8 ac, int dir_bitmap)
+{
+	enum ts_dir_idx idx;
+
+	for (idx = 0; idx < TS_DIR_IDX_COUNT; idx++) {
+		if (!(dir_bitmap & BIT(idx)))
+			continue;
+
+		if (!wpa_s->tspecs[ac][idx])
+			continue;
+
+		os_free(wpa_s->tspecs[ac][idx]);
+		wpa_s->tspecs[ac][idx] = NULL;
+	}
+}
+
 static void wmm_ac_deinit(struct wpa_supplicant *wpa_s)
 {
+	int i;
+
+	for (i = 0; i < WMM_AC_NUM; i++)
+		wmm_ac_del_ts(wpa_s, i, TS_DIR_IDX_ALL);
+
 	os_free(wpa_s->wmm_ac_assoc_info);
 	wpa_s->wmm_ac_assoc_info = NULL;
 }
@@ -121,3 +401,80 @@ void wmm_ac_notify_disassoc(struct wpa_supplicant *wpa_s)
 	wmm_ac_deinit(wpa_s);
 	wpa_printf(MSG_DEBUG, "WMM AC: WMM AC is disabled");
 }
+
+
+int wpas_wmm_ac_delts(struct wpa_supplicant *wpa_s, u8 tsid)
+{
+	struct wmm_tspec_element *tspec;
+	int ac;
+	enum ts_dir_idx dir;
+
+	if (!wpa_s->wmm_ac_assoc_info) {
+		wpa_printf(MSG_DEBUG,
+			   "WMM AC: Failed to delete TS, WMM AC is disabled");
+		return -1;
+	}
+
+	ac = wmm_ac_find_tsid(wpa_s, tsid, &dir);
+	if (ac < 0) {
+		wpa_printf(MSG_DEBUG, "WMM AC: TS does not exist");
+		return -1;
+	}
+
+	tspec = wpa_s->tspecs[ac][dir];
+	wmm_ac_send_delts(wpa_s, tspec, wpa_s->bssid);
+
+	os_free(tspec);
+	wpa_s->tspecs[ac][dir] = NULL;
+
+	wpa_printf(MSG_DEBUG, "WMM AC: TS was deleted (TSID=%u addr="MACSTR")",
+		   tsid, MAC2STR(wpa_s->bssid));
+
+	return 0;
+}
+
+
+int wpas_wmm_ac_addts(struct wpa_supplicant *wpa_s,
+		      struct wmm_ac_ts_setup_params *params)
+{
+	struct wmm_ac_addts_request *addts_req;
+
+	if (!wpa_s->wmm_ac_assoc_info) {
+		wpa_printf(MSG_DEBUG,
+			   "WMM AC: can't add TS - missing assoc data");
+		return -1;
+	}
+
+	/*
+	 * we can setup downlink TS even without driver support.
+	 * however, we need driver support for the other directions.
+	 */
+	if (params->direction != WMM_AC_DIR_DOWNLINK &&
+	    !wpa_s->wmm_ac_supported) {
+		wpa_printf(MSG_DEBUG,
+			   "Can't set uplink/bidi TS without driver support");
+		return -1;
+	}
+
+	if (!wmm_ac_ts_req_is_valid(wpa_s, params))
+		return -1;
+
+	wpa_printf(MSG_DEBUG, "WMM AC: TS setup request (addr=" MACSTR
+		   " tsid=%u user priority=%u direction=%d)",
+		   MAC2STR(wpa_s->bssid), params->tsid,
+		   params->user_priority, params->direction);
+
+	addts_req = wmm_ac_build_addts_req(wpa_s, params, wpa_s->bssid);
+	if (!addts_req)
+		return -1;
+
+	if (wmm_ac_send_addts_request(wpa_s, addts_req))
+		goto err;
+
+	/* TODO: wait for ADDTS response, etc. */
+	os_free(addts_req);
+	return 0;
+err:
+	os_free(addts_req);
+	return -1;
+}
diff --git a/wpa_supplicant/wmm_ac.h b/wpa_supplicant/wmm_ac.h
index a7efcb7..e85d519 100644
--- a/wpa_supplicant/wmm_ac.h
+++ b/wpa_supplicant/wmm_ac.h
@@ -15,6 +15,14 @@
 
 struct wpa_supplicant;
 
+#define WMM_AC_ACCESS_POLICY_EDCA 1
+#define WMM_AC_FIXED_MSDU_SIZE BIT(15)
+
+#define WMM_AC_MAX_TID 7
+#define WMM_AC_MAX_USER_PRIORITY 7
+#define WMM_AC_MIN_SBA_UNITY 0x2000
+#define WMM_AC_MAX_NOMINAL_MSDU 32767
+
 /**
  * struct wmm_ac_assoc_data - WMM Admission Control Association Data
  *
@@ -44,7 +52,118 @@ struct wmm_ac_assoc_data {
 	} ac_params[WMM_AC_NUM];
 };
 
+/**
+ * wmm_ac_dir - WMM Admission Control Direction
+ */
+enum wmm_ac_dir {
+	WMM_AC_DIR_UPLINK = 0,
+	WMM_AC_DIR_DOWNLINK = 1,
+	WMM_AC_DIR_BIDIRECTIONAL = 3
+};
+
+/**
+ * ts_dir_idx - indices of internally saved tspecs
+ *
+ * we can have multiple tspecs (downlink + uplink) per ac.
+ * save them in array, and use the enum to directly access
+ * the respective tspec slot (according to the direction).
+ */
+enum ts_dir_idx {
+	TS_DIR_IDX_UPLINK,
+	TS_DIR_IDX_DOWNLINK,
+	TS_DIR_IDX_BIDI,
+
+	TS_DIR_IDX_COUNT
+};
+#define TS_DIR_IDX_ALL (BIT(TS_DIR_IDX_COUNT) - 1)
+
+/**
+ * struct wmm_ac_addts_request - ADDTS Request Information
+ *
+ * The last sent ADDTS request(s) will be saved as element(s) of this struct in
+ * order to be compared with the received ADDTS response in ADDTS response
+ * action frame handling and should be stored until that point.
+ * In case a new traffic stream will be created/replaced/updated, only it's
+ * relevant traffic stream information will be stored as a wmm_ac_ts struct.
+ */
+struct wmm_ac_addts_request {
+	/*
+	 * dialog token - used to link the recived ADDTS response with this
+	 * saved ADDTS request when ADDTS response is being handled
+	 */
+	u8 dialog_token;
+
+	/*
+	 * address - the alleged traffic stream's receiver/transmitter address
+	 * Address and TID are used to identify the TS (TID is contained in
+	 * TSPEC)
+	 */
+	u8 address[ETH_ALEN];
+
+	/*
+	 * tspec - Traffic Stream Specification, will be used to compare the
+	 * sent TSPEC in ADDTS request to the received TSPEC in ADDTS response
+	 * and act accordingly in ADDTS response handling
+	 */
+	struct wmm_tspec_element tspec;
+};
+
+
+/**
+ * struct wmm_ac_ts_setup_params - TS setup parameters
+ *
+ * This struct is holding parameters which should be provided
+ * to wmm_ac_ts_setup in order to setup a traffic strem
+ */
+struct wmm_ac_ts_setup_params {
+	/*
+	 * tsid - Traffic ID
+	 * TID and address are used to identify the TS
+	 */
+	int tsid;
+
+	/*
+	 * direction - Traffic Stream's direction
+	 */
+	enum wmm_ac_dir direction;
+
+	/*
+	 * user_priority - Traffic Stream's user priority
+	 */
+	int user_priority;
+
+	/*
+	 * nominal_msdu_size - nominal MAC service data unit size
+	 */
+	int nominal_msdu_size;
+
+	/*
+	 * fixed_nominal_msdu - whether the size is fixed
+	 * 0 = nominal MSDU size is not fixed
+	 * 1 = nominal MSDU size is fixed
+	 */
+	int fixed_nominal_msdu;
+
+	/*
+	 * surplus_bandwidth_allowance - specifies excess time allocation
+	 */
+	int mean_data_rate;
+
+	/*
+	 * minimum_phy_rate - specifies the minimum supported phy rate in bps
+	 */
+	int minimum_phy_rate;
+
+	/*
+	 * surplus_bandwidth_allowance - specifies excess time allocation
+	 */
+	int surplus_bandwidth_allowance;
+};
+
 void wmm_ac_notify_assoc(struct wpa_supplicant *wpa_s, const u8 *ies,
 			 size_t ies_len, const struct wmm_params *wmm_params);
 void wmm_ac_notify_disassoc(struct wpa_supplicant *wpa_s);
+int wpas_wmm_ac_addts(struct wpa_supplicant *wpa_s,
+		      struct wmm_ac_ts_setup_params *params);
+int wpas_wmm_ac_delts(struct wpa_supplicant *wpa_s, u8 tsid);
 #endif /* WMM_AC_H */
diff --git a/wpa_supplicant/wpa_supplicant_i.h b/wpa_supplicant/wpa_supplicant_i.h
index 443065d..4c6708b 100644
--- a/wpa_supplicant/wpa_supplicant_i.h
+++ b/wpa_supplicant/wpa_supplicant_i.h
@@ -877,6 +877,8 @@ struct wpa_supplicant {
 
 	unsigned int wmm_ac_supported:1;
 	struct wmm_ac_assoc_data *wmm_ac_assoc_info;
+	struct wmm_tspec_element *tspecs[WMM_AC_NUM][TS_DIR_IDX_COUNT];
+	u8 wmm_ac_last_dialog_token;
 };
 
 
