diff -aruN iw_0.9.22/keepalive.c iw_0.9.22.N/keepalive.c
--- iw_0.9.22/keepalive.c	1969-12-31 16:00:00.000000000 -0800
+++ iw_0.9.22.N/keepalive.c	2015-03-27 17:02:09.738162006 -0700
@@ -0,0 +1,287 @@
+#include <net/if.h>
+#include <errno.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include <netlink/genl/genl.h>
+#include <netlink/genl/family.h>
+#include <netlink/genl/ctrl.h>
+#include <netlink/msg.h>
+#include <netlink/attr.h>
+
+#include "nl80211.h"
+#include "iw.h"
+
+typedef  uint8_t  u8;
+typedef  uint16_t u16;
+typedef  uint32_t u32;
+
+#define CFG80211_KEEP_ALIVE_PAYLOAD_MAX_LENGTH      64
+
+struct cfg80211_keepalive_request {
+	u32 interval;
+	u8  cmd;		/* 0: ADD; 1: DEL: 2: START; 3: STOP */
+	u8  index;
+	u8  trig;
+	u8  dst_macaddr[ETH_ALEN];
+	u8  payload_len;
+	u8  payload[CFG80211_KEEP_ALIVE_PAYLOAD_MAX_LENGTH];
+};
+
+struct cfg80211_keepalive_request  keepalive_req;
+
+SECTION(keepalive);
+
+static void keepalive_hex_dump(char *title, u8 *buf, size_t len)
+{
+	int i;
+
+    printf("%s - hexdump(len=%lu):", title, (unsigned long) len);
+
+    for (i = 0; i < len; i++)
+        printf(" %02x", buf[i]);
+    printf("\n");
+}
+
+static int nl80211_parse_klv_req(const char *s)
+{
+	long i;
+	char *endp;
+
+	i = strtol(s, &endp, 10);
+
+	if(endp == s)
+    	return -1;
+	return i;
+}
+
+static int nl80211_str2hex(u8 *src, u8 *dst, int src_len)
+{
+	int i, bytecount=0;
+
+	if (src_len & 0x01)
+		return -2;
+
+	for (i=0; i<src_len; i++, src++) {
+		if (i != 0 && i%2 == 0) {
+			dst++;
+			bytecount++;
+		} else {
+			*dst <<= 4;
+		}
+
+		if ((*src >= '0') && (*src <= '9'))
+			*dst += *src - '0';
+		else if ((*src >= 'A') && (*src <= 'F'))
+			*dst += *src - 'A' + 10;
+		else if ((*src >= 'a') && (*src <= 'f'))
+			*dst += *src - 'a' + 10;
+		else {
+			return -1;
+		}
+	}
+
+	bytecount++;
+
+	return bytecount;
+}
+
+static int build_klv_req(struct nl_msg *msg, int klv_cmd, u8 index, int interval, u8 trig, u8 *dst_macaddr, u8 payload_len, u8 *payload)
+{
+	int ret = -1;
+
+	if (!msg)
+		return -1;
+
+	NLA_PUT_U32(msg, NL80211_ATTR_KLV_TYPE, klv_cmd);
+	NLA_PUT_U32(msg, NL80211_ATTR_KLV_INDEX, index);
+
+	if (klv_cmd == 0 || klv_cmd == 1) {
+
+		NLA_PUT_U32(msg, NL80211_ATTR_KLV_INTVL, interval);
+		NLA_PUT_U32 (msg, NL80211_ATTR_KLV_TRIG, trig);
+
+		if (payload != NULL) {
+	    		if (dst_macaddr) {
+	        		keepalive_hex_dump("nl80211 klv_dstmac: ", dst_macaddr, ETH_ALEN);
+	    			NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst_macaddr);
+	    		}
+
+       	    		keepalive_hex_dump("nl80211 klv_payload: ", payload, payload_len);
+	    		NLA_PUT(msg, NL80211_ATTR_KLV_PAYLOAD, payload_len, payload);
+		}
+	}
+
+	ret = 0;
+
+ nla_put_failure:
+    return ret;
+}
+
+static int nl80211_change_klv_req(char **cmdptr, int cmdtype, struct nl_msg *msg)
+{
+	u8   index = 1, trig_type = 1, payload_len = 0;
+	u8   dst_macaddr[ETH_ALEN];
+	u32  interval_ms = 10;
+        u8   *payload=NULL;
+	int  val;
+	u8   dst_payload[64];
+
+	switch(cmdtype) {
+		case 0:  	/* KLV-ADD   */
+			val = nl80211_parse_klv_req(*cmdptr++);
+			/* valid index # is [1, 3]. Index #0 is reserved for driver internal use */
+			if (val <= 0 || val > 3) {
+				printf("invalid index (%d)\n", val);
+				return -1;
+			}
+			index = val;
+
+			val = nl80211_parse_klv_req(*cmdptr++);
+			/* limit klv interval to [10 ms, 50000 ms] */
+			if (val < 1000 || val > 55000) {
+				printf("Keeplalive interval is out of range.\n");
+				return -1;
+			}
+			interval_ms = val;
+
+			val = nl80211_parse_klv_req(*cmdptr++);
+			/* valid trig type is limited to 0 or 1 */
+			if (val < 0 || val > 1) {
+				printf("Invalid keepalive trigger type.\n");
+				return -1;
+			}
+			trig_type = val;
+
+			memset(dst_macaddr, 0, ETH_ALEN);
+			if (nl80211_str2hex((u8 *)(*cmdptr++), dst_macaddr, 2*ETH_ALEN) <= 0) {
+				printf("Invalid mac address\n");
+				return -1;
+			}
+
+			val = strlen(*cmdptr);			/* klv payload length must be <= 64 bytes */
+			if (val > 128) {
+				printf("Payload is too long\n");
+				return -1;
+			}
+
+			memset(dst_payload, 0, 64);
+			if ((payload_len=nl80211_str2hex((u8 *)(*cmdptr), dst_payload, val)) < 0) {
+				printf("Keepalive payload is invalid\n");
+				return -1;
+			}
+
+		    	break;
+
+		case 1:  	/* KLV-DEL   */
+			index = nl80211_parse_klv_req(cmdptr[0]);
+			printf("index = %d\n", index);
+			/* index #0 is reserved for driver internal klv type */
+			if (index <= 0 || index > 3) {
+				return -1;
+			}
+
+			interval_ms = 10000;
+			break;
+
+		case 2:  	/* KLV-START */
+		case 3:  	/* KLV-STOP  */
+			break;
+
+		case 4:  	/* KLV-SHOW  */
+			printf("Not supported\n");
+			val = 0;
+			return val;
+
+		default:
+		    return -1;
+	}
+
+	val = build_klv_req(msg, cmdtype, index, interval_ms, trig_type, &dst_macaddr[0], payload_len, dst_payload);
+
+    return val;
+}
+
+static int handle_keepalive_add(struct nl80211_state *state, struct nl_cb *cb,
+				struct nl_msg *msg, int argc, char **argv)
+{
+	int ret;
+
+	if (argc != 5) {
+		printf("Command parameters incorrect.\n");
+		return -1;
+	}
+
+	ret = nl80211_change_klv_req(argv, 0, msg);
+    printf("ret is %d\n", ret);
+	return ret;
+}
+
+static int handle_keepalive_delete(struct nl80211_state *state, struct nl_cb *cb,
+				struct nl_msg *msg, int argc, char **argv)
+{
+	int ret;
+
+	if (argc != 1) {
+		printf("Command parameters incorrect.\n");
+		return -1;
+	}
+
+	ret = nl80211_change_klv_req(argv, 1, msg);
+	return ret;
+}
+
+static int handle_keepalive_start(struct nl80211_state *state, struct nl_cb *cb,
+				struct nl_msg *msg, int argc, char **argv)
+{
+	int ret;
+	ret = nl80211_change_klv_req(argv, 2, msg);
+	return ret;
+}
+
+static int handle_keepalive_stop(struct nl80211_state *state, struct nl_cb *cb,
+				struct nl_msg *msg, int argc, char **argv)
+{
+	int ret;
+	ret = nl80211_change_klv_req(argv, 3, msg);
+	return ret;
+}
+
+static int print_keepalive_handler(struct nl_msg *msg, void *arg)
+{
+	int *ret = arg;
+	if (arg != NULL)
+		*ret = 0;
+	return 0;
+}
+
+static int handle_keepalive_show(struct nl80211_state *state, struct nl_cb *cb,
+			      struct nl_msg *msg, int argc, char **argv)
+{
+	int ret;
+
+    printf("handle_keepalive_show\n");
+	nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
+		  print_keepalive_handler, &ret);
+
+	return 0;
+}
+
+COMMAND(keepalive, add, "<index> <interval> <trigger_type> <dst_macaddr> <payload>",
+	NL80211_CMD_SET_KEEPALIVE, 0, CIB_NETDEV, handle_keepalive_add,
+	"Configure keep alive feature");
+
+COMMAND(keepalive, del, "<index>",
+	NL80211_CMD_SET_KEEPALIVE, 0, CIB_NETDEV, handle_keepalive_delete,
+	"Configure keep alive feature");
+
+COMMAND(keepalive, start, "",
+	NL80211_CMD_SET_KEEPALIVE, 0, CIB_NETDEV, handle_keepalive_start,
+	"Configure keep alive feature");
+
+COMMAND(keepalive, stop, "",
+	NL80211_CMD_SET_KEEPALIVE, 0, CIB_NETDEV, handle_keepalive_stop,
+	"Configure keep alive feature");
+
+COMMAND(keepalive, show, "", NL80211_CMD_GET_KEEPALIVE, 0, CIB_NETDEV, handle_keepalive_show,
+	"Show keepalive status.");
diff -aruN iw_0.9.22/Makefile iw_0.9.22.N/Makefile
--- iw_0.9.22/Makefile	2015-03-27 17:09:36.094185681 -0700
+++ iw_0.9.22.N/Makefile	2015-03-27 17:02:09.738162006 -0700
@@ -18,7 +18,7 @@
 	interface.o ibss.o station.o survey.o util.o \
 	mesh.o mpath.o scan.o reg.o version.o \
 	reason.o status.o connect.o link.o offch.o ps.o cqm.o \
-	bitrate.o wowlan.o roc.o
+	bitrate.o wowlan.o roc.o keepalive.o
 OBJS += sections.o
 ALL = iw
 
diff -aruN iw_0.9.22/nl80211.h iw_0.9.22.N/nl80211.h
--- iw_0.9.22/nl80211.h	2013-06-07 18:36:50.000000000 -0700
+++ iw_0.9.22.N/nl80211.h	2015-03-27 17:06:38.766176275 -0700
@@ -616,6 +616,8 @@
 
 	NL80211_CMD_SET_REKEY_OFFLOAD,
 
+	NL80211_CMD_GET_KEEPALIVE,
+	NL80211_CMD_SET_KEEPALIVE,
 	/* add new commands above here */
 
 	/* used to define NL80211_CMD_MAX below */
@@ -1217,6 +1219,81 @@
 	NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
 	NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
 
+	NL80211_ATTR_SCAN_SUPP_RATES,
+
+	NL80211_ATTR_HIDDEN_SSID,
+
+	NL80211_ATTR_IE_PROBE_RESP,
+	NL80211_ATTR_IE_ASSOC_RESP,
+
+	NL80211_ATTR_STA_WME,
+	NL80211_ATTR_SUPPORT_AP_UAPSD,
+
+	NL80211_ATTR_ROAM_SUPPORT,
+
+	NL80211_ATTR_SCHED_SCAN_MATCH,
+	NL80211_ATTR_MAX_MATCH_SETS,
+
+	NL80211_ATTR_PMKSA_CANDIDATE,
+
+	NL80211_ATTR_TX_NO_CCK_RATE,
+
+	NL80211_ATTR_TDLS_ACTION,
+	NL80211_ATTR_TDLS_DIALOG_TOKEN,
+	NL80211_ATTR_TDLS_OPERATION,
+	NL80211_ATTR_TDLS_SUPPORT,
+	NL80211_ATTR_TDLS_EXTERNAL_SETUP,
+
+	NL80211_ATTR_DEVICE_AP_SME,
+
+	NL80211_ATTR_DONT_WAIT_FOR_ACK,
+
+	NL80211_ATTR_FEATURE_FLAGS,
+
+	NL80211_ATTR_PROBE_RESP_OFFLOAD,
+
+	NL80211_ATTR_PROBE_RESP,
+
+	NL80211_ATTR_DFS_REGION,
+
+	NL80211_ATTR_DISABLE_HT,
+	NL80211_ATTR_HT_CAPABILITY_MASK,
+
+	NL80211_ATTR_NOACK_MAP,
+
+	NL80211_ATTR_INACTIVITY_TIMEOUT,
+
+	NL80211_ATTR_RX_SIGNAL_DBM,
+
+	NL80211_ATTR_BG_SCAN_PERIOD,
+
+	NL80211_ATTR_WDEV,
+
+	NL80211_ATTR_USER_REG_HINT_TYPE,
+
+	/* leave some room for new attributes in nl80211 updates */
+	NL80211_ATTR_IM_SCAN_RESULT = NL80211_ATTR_BG_SCAN_PERIOD + 10,
+	NL80211_ATTR_IM_SCAN_RESULT_MIN_RSSI,
+
+	NL80211_ATTR_SCAN_MIN_DWELL,
+	NL80211_ATTR_SCAN_MAX_DWELL,
+	NL80211_ATTR_SCAN_NUM_PROBE,
+
+	NL80211_ATTR_SCHED_SCAN_SHORT_INTERVAL,
+	NL80211_ATTR_SCHED_SCAN_NUM_SHORT_INTERVALS,
+
+	NL80211_ATTR_ROAMING_DISABLED,
+	NL80211_ATTR_CH_SWITCH_COUNT,
+	NL80211_ATTR_CH_SWITCH_BLOCK_TX,
+	NL80211_ATTR_CH_SWITCH_POST_BLOCK_TX,
+
+	NL80211_ATTR_KLVDATA,
+	NL80211_ATTR_KLV_TYPE,
+	NL80211_ATTR_KLV_INTVL,
+	NL80211_ATTR_KLV_INDEX,
+	NL80211_ATTR_KLV_TRIG,
+	NL80211_ATTR_KLV_PAYLOAD,
+
 	/* add attributes here, update the policy in nl80211.c */
 
 	__NL80211_ATTR_AFTER_LAST,