--- a/wpa_supplicant/wpa_supplicant_i.h
+++ b/wpa_supplicant/wpa_supplicant_i.h
@@ -95,6 +95,8 @@ struct wpa_interface {
 	 * receiving of EAPOL frames from an additional interface.
 	 */
 	const char *bridge_ifname;
+
+	const char *hostapd_ctrl;
 };
 
 /**
@@ -294,6 +296,8 @@ struct wpa_supplicant {
 #endif /* CONFIG_CTRL_IFACE_DBUS_NEW */
 	char bridge_ifname[16];
 
+	struct wpa_ctrl *hostapd;
+
 	char *confname;
 	struct wpa_config *conf;
 	int countermeasures;
--- a/wpa_supplicant/Makefile
+++ b/wpa_supplicant/Makefile
@@ -13,6 +13,10 @@ PKG_CONFIG ?= pkg-config
 CFLAGS += -I../src
 CFLAGS += -I../src/utils
 
+ifdef MULTICALL
+CFLAGS += -DMULTICALL
+endif
+
 -include .config
 -include $(if $(MULTICALL),../hostapd/.config)
 
@@ -76,6 +80,10 @@ OBJS_c = wpa_cli.o ../src/common/wpa_ctr
 OBJS_c += ../src/utils/wpa_debug.o
 OBJS_c += ../src/utils/common.o
 
+ifdef MULTICALL
+OBJS += ../src/common/wpa_ctrl.o
+endif
+
 ifndef CONFIG_OS
 ifdef CONFIG_NATIVE_WINDOWS
 CONFIG_OS=win32
--- a/wpa_supplicant/wpa_supplicant.c
+++ b/wpa_supplicant/wpa_supplicant.c
@@ -107,6 +107,55 @@ extern int wpa_debug_show_keys;
 extern int wpa_debug_timestamp;
 extern struct wpa_driver_ops *wpa_drivers[];
 
+#ifdef MULTICALL
+static int hostapd_stop(struct wpa_supplicant *wpa_s)
+{
+	const char *cmd = "DOWN";
+	char buf[256];
+	int len = sizeof(buf);
+
+	if (wpa_ctrl_request(wpa_s->hostapd, cmd, os_strlen(cmd), buf, &len, NULL) < 0) {
+		wpa_printf(MSG_ERROR, "\nFailed to stop hostapd AP interfaces\n");
+		return -1;
+	}
+	return 0;
+}
+
+static int hostapd_reload(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
+{
+	char *cmd = NULL;
+	char buf[256];
+	int len = sizeof(buf);
+	int channel, hw_mode;
+	int ret;
+
+	if (!bss)
+		return;
+
+	if (bss->freq < 4000) {
+		hw_mode = HOSTAPD_MODE_IEEE80211G;
+		channel = (bss->freq - 2407) / 5;
+	} else {
+		hw_mode = HOSTAPD_MODE_IEEE80211A;
+		channel = (bss->freq - 5000) / 5;
+	}
+
+	if (asprintf(&cmd, "UPDATE channel=%d sec_chan=0 hw_mode=%d ieee80211n=%d",
+		     channel, hw_mode, !!bss->ht_capab) < 0) {
+		return -1;
+	}
+
+	ret = wpa_ctrl_request(wpa_s->hostapd, cmd, os_strlen(cmd), buf, &len, NULL);
+	free(cmd);
+
+	if (ret < 0) {
+		wpa_printf(MSG_ERROR, "\nFailed to reload hostapd AP interfaces\n");
+		return -1;
+	}
+	return 0;
+}
+#endif
+
 /* Configure default/group WEP keys for static WEP */
 int wpa_set_wep_keys(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid)
 {
@@ -672,8 +721,16 @@ void wpa_supplicant_set_state(struct wpa
 #endif /* CONFIG_P2P */
 
 		sme_sched_obss_scan(wpa_s, 1);
+#ifdef MULTICALL
+		if (wpa_s->hostapd)
+			hostapd_reload(wpa_s, wpa_s->current_bss);
+#endif
 	} else if (state == WPA_DISCONNECTED || state == WPA_ASSOCIATING ||
 		   state == WPA_ASSOCIATED) {
+#ifdef MULTICALL
+		if (wpa_s->hostapd)
+			hostapd_stop(wpa_s);
+#endif
 		wpa_s->new_connection = 1;
 		wpa_drv_set_operstate(wpa_s, 0);
 #ifndef IEEE8021X_EAPOL
@@ -2727,6 +2784,21 @@ static int wpa_supplicant_init_iface(str
 		os_strlcpy(wpa_s->bridge_ifname, iface->bridge_ifname,
 			   sizeof(wpa_s->bridge_ifname));
 	}
+#ifdef MULTICALL
+	if (iface->hostapd_ctrl) {
+		char *cmd = "DOWN";
+		char buf[256];
+		int len = sizeof(buf);
+
+		wpa_s->hostapd = wpa_ctrl_open(iface->hostapd_ctrl);
+		if (!wpa_s->hostapd) {
+			wpa_printf(MSG_ERROR, "\nFailed to connect to hostapd\n");
+			return -1;
+		}
+		if (hostapd_stop(wpa_s) < 0)
+			return -1;
+	}
+#endif
 
 	/* RSNA Supplicant Key Management - INITIALIZE */
 	eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
--- a/wpa_supplicant/bss.c
+++ b/wpa_supplicant/bss.c
@@ -11,6 +11,7 @@
 #include "utils/common.h"
 #include "utils/eloop.h"
 #include "common/ieee802_11_defs.h"
+#include "common/ieee802_11_common.h"
 #include "drivers/driver.h"
 #include "wpa_supplicant_i.h"
 #include "config.h"
@@ -139,6 +140,8 @@ struct wpa_bss * wpa_bss_get(struct wpa_
 
 static void wpa_bss_copy_res(struct wpa_bss *dst, struct wpa_scan_res *src)
 {
+	struct ieee80211_ht_capabilities *capab;
+	struct ieee802_11_elems elems;
 	os_time_t usec;
 
 	dst->flags = src->flags;
@@ -151,6 +154,12 @@ static void wpa_bss_copy_res(struct wpa_
 	dst->level = src->level;
 	dst->tsf = src->tsf;
 
+	memset(&elems, 0, sizeof(elems));
+	ieee802_11_parse_elems((u8 *) (src + 1), src->ie_len, &elems, 0);
+	capab = (struct ieee80211_ht_capabilities *) elems.ht_capabilities;
+	if (capab)
+		dst->ht_capab = le_to_host16(capab->ht_capabilities_info);
+
 	os_get_time(&dst->last_update);
 	dst->last_update.sec -= src->age / 1000;
 	usec = (src->age % 1000) * 1000;
--- a/wpa_supplicant/bss.h
+++ b/wpa_supplicant/bss.h
@@ -72,6 +72,7 @@ struct wpa_bss {
 	u8 bssid[ETH_ALEN];
 	u8 hessid[ETH_ALEN];
 	u8 ssid[32];
+	u16 ht_capab;
 	size_t ssid_len;
 	int freq;
 	u16 beacon_int;
--- a/wpa_supplicant/main.c
+++ b/wpa_supplicant/main.c
@@ -25,7 +25,7 @@ static void usage(void)
 	       "usage:\n"
 	       "  wpa_supplicant [-BddhKLqqstuvW] [-P<pid file>] "
 	       "[-g<global ctrl>] \\\n"
-	       "        -i<ifname> -c<config file> [-C<ctrl>] [-D<driver>] "
+	       "        -i<ifname> -c<config file> [-C<ctrl>] [-D<driver>] [-H<hostapd path>]"
 	       "[-p<driver_param>] \\\n"
 	       "        [-b<br_ifname>] [-f<debug file>] [-e<entropy file>] "
 	       "\\\n"
@@ -67,6 +67,7 @@ static void usage(void)
 #endif /* CONFIG_DEBUG_LINUX_TRACING */
 	printf("  -t = include timestamp in debug messages\n"
 	       "  -h = show this help text\n"
+		   "  -H = connect to a hostapd instance to manage state changes\n"
 	       "  -L = show license (BSD)\n"
 	       "  -o = override driver parameter for new interfaces\n"
 	       "  -O = override ctrl_interface parameter for new interfaces\n"
@@ -155,7 +156,7 @@ int main(int argc, char *argv[])
 
 	for (;;) {
 		c = getopt(argc, argv,
-			   "b:Bc:C:D:de:f:g:hi:KLNo:O:p:P:qsTtuvW");
+			   "b:Bc:C:D:de:f:g:hH:i:KLNo:O:p:P:qsTtuvW");
 		if (c < 0)
 			break;
 		switch (c) {
@@ -199,6 +200,9 @@ int main(int argc, char *argv[])
 			usage();
 			exitcode = 0;
 			goto out;
+		case 'H':
+			iface->hostapd_ctrl = optarg;
+			break;
 		case 'i':
 			iface->ifname = optarg;
 			break;
