[thirdparty/hostap.git] / wpa_supplicant / offchannel.c

/*
 * wpa_supplicant - Off-channel Action frame TX/RX
 * Copyright (c) 2009-2010, Atheros Communications
 * Copyright (c) 2011, Qualcomm Atheros
 *
 * This software may be distributed under the terms of the BSD license.
 * See README for more details.
 */

#include "includes.h"

#include "common.h"
#include "utils/eloop.h"
#include "wpa_supplicant_i.h"
#include "driver_i.h"
#include "offchannel.h"


static struct wpa_supplicant *
wpas_get_tx_interface(struct wpa_supplicant *wpa_s, const u8 *src)
{
	struct wpa_supplicant *iface;

	if (os_memcmp(src, wpa_s->own_addr, ETH_ALEN) == 0)
		return wpa_s;

	/*
	 * Try to find a group interface that matches with the source address.
	 */
	iface = wpa_s->global->ifaces;
	while (iface) {
		if (os_memcmp(wpa_s->pending_action_src,
			      iface->own_addr, ETH_ALEN) == 0)
			break;
		iface = iface->next;
	}
	if (iface) {
		wpa_printf(MSG_DEBUG, "P2P: Use group interface %s "
			   "instead of interface %s for Action TX",
			   iface->ifname, wpa_s->ifname);
		return iface;
	}

	return wpa_s;
}


static void wpas_send_action_cb(void *eloop_ctx, void *timeout_ctx)
{
	struct wpa_supplicant *wpa_s = eloop_ctx;
	struct wpa_supplicant *iface;
	int res;
	int without_roc;

	without_roc = wpa_s->pending_action_without_roc;
	wpa_s->pending_action_without_roc = 0;
	wpa_printf(MSG_DEBUG, "Off-channel: Send Action callback "
		   "(without_roc=%d pending_action_tx=%p)",
		   without_roc, wpa_s->pending_action_tx);

	if (wpa_s->pending_action_tx == NULL)
		return;

	/*
	 * This call is likely going to be on the P2P device instance if the
	 * driver uses a separate interface for that purpose. However, some
	 * Action frames are actually sent within a P2P Group and when that is
	 * the case, we need to follow power saving (e.g., GO buffering the
	 * frame for a client in PS mode or a client following the advertised
	 * NoA from its GO). To make that easier for the driver, select the
	 * correct group interface here.
	 */
	iface = wpas_get_tx_interface(wpa_s, wpa_s->pending_action_src);

	if (wpa_s->off_channel_freq != wpa_s->pending_action_freq &&
	    wpa_s->pending_action_freq != 0 &&
	    wpa_s->pending_action_freq != iface->assoc_freq) {
		wpa_printf(MSG_DEBUG, "Off-channel: Pending Action frame TX "
			   "waiting for another freq=%u (off_channel_freq=%u "
			   "assoc_freq=%u)",
			   wpa_s->pending_action_freq,
			   wpa_s->off_channel_freq,
			   iface->assoc_freq);
		if (without_roc && wpa_s->off_channel_freq == 0) {
			/*
			 * We may get here if wpas_send_action() found us to be
			 * on the correct channel, but remain-on-channel cancel
			 * event was received before getting here.
			 */
			wpa_printf(MSG_DEBUG, "Off-channel: Schedule "
				   "remain-on-channel to send Action frame");
			if (wpa_drv_remain_on_channel(
				    wpa_s, wpa_s->pending_action_freq, 200) <
			    0) {
				wpa_printf(MSG_DEBUG, "Off-channel: Failed to "
					   "request driver to remain on "
					   "channel (%u MHz) for Action Frame "
					   "TX", wpa_s->pending_action_freq);
			} else {
				wpa_s->off_channel_freq = 0;
				wpa_s->roc_waiting_drv_freq =
					wpa_s->pending_action_freq;
			}
		}
		return;
	}

	wpa_printf(MSG_DEBUG, "Off-channel: Sending pending Action frame to "
		   MACSTR " using interface %s",
		   MAC2STR(wpa_s->pending_action_dst), iface->ifname);
	res = wpa_drv_send_action(iface, wpa_s->pending_action_freq, 0,
				  wpa_s->pending_action_dst,
				  wpa_s->pending_action_src,
				  wpa_s->pending_action_bssid,
				  wpabuf_head(wpa_s->pending_action_tx),
				  wpabuf_len(wpa_s->pending_action_tx),
				  wpa_s->pending_action_no_cck);
	if (res) {
		wpa_printf(MSG_DEBUG, "Off-channel: Failed to send the "
			   "pending Action frame");
		/*
		 * Use fake TX status event to allow state machines to
		 * continue.
		 */
		offchannel_send_action_tx_status(
			wpa_s, wpa_s->pending_action_dst,
			wpabuf_head(wpa_s->pending_action_tx),
			wpabuf_len(wpa_s->pending_action_tx),
			OFFCHANNEL_SEND_ACTION_FAILED);
	}
}


void offchannel_send_action_tx_status(
	struct wpa_supplicant *wpa_s, const u8 *dst, const u8 *data,
	size_t data_len, enum offchannel_send_action_result result)
{
	if (wpa_s->pending_action_tx == NULL) {
		wpa_printf(MSG_DEBUG, "Off-channel: Ignore Action TX status - "
			   "no pending operation");
		return;
	}

	if (os_memcmp(dst, wpa_s->pending_action_dst, ETH_ALEN) != 0) {
		wpa_printf(MSG_DEBUG, "Off-channel: Ignore Action TX status - "
			   "unknown destination address");
		return;
	}

	wpabuf_free(wpa_s->pending_action_tx);
	wpa_s->pending_action_tx = NULL;

	wpa_printf(MSG_DEBUG, "Off-channel: TX status result=%d cb=%p",
		   result, wpa_s->pending_action_tx_status_cb);

	if (wpa_s->pending_action_tx_status_cb) {
		wpa_s->pending_action_tx_status_cb(
			wpa_s, wpa_s->pending_action_freq,
			wpa_s->pending_action_dst, wpa_s->pending_action_src,
			wpa_s->pending_action_bssid,
			data, data_len, result);
	}
}


int offchannel_send_action(struct wpa_supplicant *wpa_s, unsigned int freq,
			   const u8 *dst, const u8 *src, const u8 *bssid,
			   const u8 *buf, size_t len, unsigned int wait_time,
			   void (*tx_cb)(struct wpa_supplicant *wpa_s,
					 unsigned int freq, const u8 *dst,
					 const u8 *src, const u8 *bssid,
					 const u8 *data, size_t data_len,
					 enum offchannel_send_action_result
					 result),
			   int no_cck)
{
	wpa_printf(MSG_DEBUG, "Off-channel: Send action frame: freq=%d dst="
		   MACSTR " src=" MACSTR " bssid=" MACSTR " len=%d",
		   freq, MAC2STR(dst), MAC2STR(src), MAC2STR(bssid),
		   (int) len);

	wpa_s->pending_action_tx_status_cb = tx_cb;

	if (wpa_s->pending_action_tx) {
		wpa_printf(MSG_DEBUG, "Off-channel: Dropped pending Action "
			   "frame TX to " MACSTR,
			   MAC2STR(wpa_s->pending_action_dst));
		wpabuf_free(wpa_s->pending_action_tx);
	}
	wpa_s->pending_action_tx = wpabuf_alloc(len);
	if (wpa_s->pending_action_tx == NULL) {
		wpa_printf(MSG_DEBUG, "Off-channel: Failed to allocate Action "
			   "frame TX buffer (len=%llu)",
			   (unsigned long long) len);
		return -1;
	}
	wpabuf_put_data(wpa_s->pending_action_tx, buf, len);
	os_memcpy(wpa_s->pending_action_src, src, ETH_ALEN);
	os_memcpy(wpa_s->pending_action_dst, dst, ETH_ALEN);
	os_memcpy(wpa_s->pending_action_bssid, bssid, ETH_ALEN);
	wpa_s->pending_action_freq = freq;
	wpa_s->pending_action_no_cck = no_cck;

	if (freq != 0 && wpa_s->drv_flags & WPA_DRIVER_FLAGS_OFFCHANNEL_TX) {
		struct wpa_supplicant *iface;

		iface = wpas_get_tx_interface(wpa_s,
					      wpa_s->pending_action_src);
		wpa_s->action_tx_wait_time = wait_time;

		return wpa_drv_send_action(
			iface, wpa_s->pending_action_freq,
			wait_time, wpa_s->pending_action_dst,
			wpa_s->pending_action_src, wpa_s->pending_action_bssid,
			wpabuf_head(wpa_s->pending_action_tx),
			wpabuf_len(wpa_s->pending_action_tx),
			wpa_s->pending_action_no_cck);
	}

	if (freq) {
		struct wpa_supplicant *tx_iface;
		tx_iface = wpas_get_tx_interface(wpa_s, src);
		if (tx_iface->assoc_freq == freq) {
			wpa_printf(MSG_DEBUG, "Off-channel: Already on "
				   "requested channel (TX interface operating "
				   "channel)");
			freq = 0;
		}
	}

	if (wpa_s->off_channel_freq == freq || freq == 0) {
		wpa_printf(MSG_DEBUG, "Off-channel: Already on requested "
			   "channel; send Action frame immediately");
		/* TODO: Would there ever be need to extend the current
		 * duration on the channel? */
		wpa_s->pending_action_without_roc = 1;
		eloop_cancel_timeout(wpas_send_action_cb, wpa_s, NULL);
		eloop_register_timeout(0, 0, wpas_send_action_cb, wpa_s, NULL);
		return 0;
	}
	wpa_s->pending_action_without_roc = 0;

	if (wpa_s->roc_waiting_drv_freq == freq) {
		wpa_printf(MSG_DEBUG, "Off-channel: Already waiting for "
			   "driver to get to frequency %u MHz; continue "
			   "waiting to send the Action frame", freq);
		return 0;
	}

	wpa_printf(MSG_DEBUG, "Off-channel: Schedule Action frame to be "
		   "transmitted once the driver gets to the requested "
		   "channel");
	if (wait_time > wpa_s->max_remain_on_chan)
		wait_time = wpa_s->max_remain_on_chan;
	if (wpa_drv_remain_on_channel(wpa_s, freq, wait_time) < 0) {
		wpa_printf(MSG_DEBUG, "Off-channel: Failed to request driver "
			   "to remain on channel (%u MHz) for Action "
			   "Frame TX", freq);
		return -1;
	}
	wpa_s->off_channel_freq = 0;
	wpa_s->roc_waiting_drv_freq = freq;

	return 0;
}


void offchannel_send_action_done(struct wpa_supplicant *wpa_s)
{
	wpa_printf(MSG_DEBUG, "Off-channel: Action frame sequence done "
		   "notification");
	wpabuf_free(wpa_s->pending_action_tx);
	wpa_s->pending_action_tx = NULL;
	if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_OFFCHANNEL_TX &&
	    wpa_s->action_tx_wait_time)
		wpa_drv_send_action_cancel_wait(wpa_s);

	if (wpa_s->off_channel_freq || wpa_s->roc_waiting_drv_freq) {
		wpa_drv_cancel_remain_on_channel(wpa_s);
		wpa_s->off_channel_freq = 0;
		wpa_s->roc_waiting_drv_freq = 0;
	}
}


void offchannel_remain_on_channel_cb(struct wpa_supplicant *wpa_s,
				     unsigned int freq, unsigned int duration)
{
	wpa_s->roc_waiting_drv_freq = 0;
	wpa_s->off_channel_freq = freq;
	wpas_send_action_cb(wpa_s, NULL);
}


void offchannel_cancel_remain_on_channel_cb(struct wpa_supplicant *wpa_s,
					    unsigned int freq)
{
	wpa_s->off_channel_freq = 0;
}


void offchannel_deinit(struct wpa_supplicant *wpa_s)
{
	wpabuf_free(wpa_s->pending_action_tx);
	wpa_s->pending_action_tx = NULL;
	eloop_cancel_timeout(wpas_send_action_cb, wpa_s, NULL);
}
Commit	Line	Data
24f6497c JM	1	/*
	2	* wpa_supplicant - Off-channel Action frame TX/RX
	3	* Copyright (c) 2009-2010, Atheros Communications
	4	* Copyright (c) 2011, Qualcomm Atheros
	5	*
e22d4d95 JM	6	* This software may be distributed under the terms of the BSD license.
e22d4d95 JM	7	* See README for more details.
24f6497c JM	8	*/
	9
	10	#include "includes.h"
	11
	12	#include "common.h"
	13	#include "utils/eloop.h"
	14	#include "wpa_supplicant_i.h"
	15	#include "driver_i.h"
	16	#include "offchannel.h"
	17
	18
	19
	20	static struct wpa_supplicant *
	21	wpas_get_tx_interface(struct wpa_supplicant wpa_s, const u8 src)
	22	{
	23	struct wpa_supplicant *iface;
	24
	25	if (os_memcmp(src, wpa_s->own_addr, ETH_ALEN) == 0)
	26	return wpa_s;
	27
	28	/*
	29	* Try to find a group interface that matches with the source address.
	30	*/
	31	iface = wpa_s->global->ifaces;
	32	while (iface) {
	33	if (os_memcmp(wpa_s->pending_action_src,
	34	iface->own_addr, ETH_ALEN) == 0)
	35	break;
	36	iface = iface->next;
	37	}
	38	if (iface) {
	39	wpa_printf(MSG_DEBUG, "P2P: Use group interface %s "
	40	"instead of interface %s for Action TX",
	41	iface->ifname, wpa_s->ifname);
	42	return iface;
	43	}
	44
	45	return wpa_s;
	46	}
	47
	48
	49	static void wpas_send_action_cb(void eloop_ctx, void timeout_ctx)
	50	{
	51	struct wpa_supplicant *wpa_s = eloop_ctx;
	52	struct wpa_supplicant *iface;
	53	int res;
	54	int without_roc;
	55
	56	without_roc = wpa_s->pending_action_without_roc;
	57	wpa_s->pending_action_without_roc = 0;
	58	wpa_printf(MSG_DEBUG, "Off-channel: Send Action callback "
	59	"(without_roc=%d pending_action_tx=%p)",
	60	without_roc, wpa_s->pending_action_tx);
	61
	62	if (wpa_s->pending_action_tx == NULL)
	63	return;
	64
	65	/*
	66	* This call is likely going to be on the P2P device instance if the
	67	* driver uses a separate interface for that purpose. However, some
	68	* Action frames are actually sent within a P2P Group and when that is
	69	* the case, we need to follow power saving (e.g., GO buffering the
	70	* frame for a client in PS mode or a client following the advertised
	71	* NoA from its GO). To make that easier for the driver, select the
72	* correct group interface here.
73	*/
74	iface = wpas_get_tx_interface(wpa_s, wpa_s->pending_action_src);
75
76	if (wpa_s->off_channel_freq != wpa_s->pending_action_freq &&
77	wpa_s->pending_action_freq != 0 &&
78	wpa_s->pending_action_freq != iface->assoc_freq) {
79	wpa_printf(MSG_DEBUG, "Off-channel: Pending Action frame TX "
80	"waiting for another freq=%u (off_channel_freq=%u "
81	"assoc_freq=%u)",
82	wpa_s->pending_action_freq,
83	wpa_s->off_channel_freq,
84	iface->assoc_freq);
85	if (without_roc && wpa_s->off_channel_freq == 0) {
86	/*
87	* We may get here if wpas_send_action() found us to be
88	* on the correct channel, but remain-on-channel cancel
89	* event was received before getting here.
90	*/
91	wpa_printf(MSG_DEBUG, "Off-channel: Schedule "
92	"remain-on-channel to send Action frame");
93	if (wpa_drv_remain_on_channel(
94	wpa_s, wpa_s->pending_action_freq, 200) <
95	0) {
96	wpa_printf(MSG_DEBUG, "Off-channel: Failed to "
97	"request driver to remain on "
98	"channel (%u MHz) for Action Frame "
99	"TX", wpa_s->pending_action_freq);
100	} else {
101	wpa_s->off_channel_freq = 0;
102	wpa_s->roc_waiting_drv_freq =
103	wpa_s->pending_action_freq;
104	}
105	}
106	return;
107	}
108
109	wpa_printf(MSG_DEBUG, "Off-channel: Sending pending Action frame to "
110	MACSTR " using interface %s",
111	MAC2STR(wpa_s->pending_action_dst), iface->ifname);
112	res = wpa_drv_send_action(iface, wpa_s->pending_action_freq, 0,
113	wpa_s->pending_action_dst,
114	wpa_s->pending_action_src,
115	wpa_s->pending_action_bssid,
116	wpabuf_head(wpa_s->pending_action_tx),
b106173a JM	117	wpabuf_len(wpa_s->pending_action_tx),
b106173a JM	118	wpa_s->pending_action_no_cck);
24f6497c JM	119	if (res) {
	120	wpa_printf(MSG_DEBUG, "Off-channel: Failed to send the "
	121	"pending Action frame");
	122	/*
	123	* Use fake TX status event to allow state machines to
	124	* continue.
	125	*/
	126	offchannel_send_action_tx_status(
	127	wpa_s, wpa_s->pending_action_dst,
	128	wpabuf_head(wpa_s->pending_action_tx),
	129	wpabuf_len(wpa_s->pending_action_tx),
	130	OFFCHANNEL_SEND_ACTION_FAILED);
	131	}
	132	}
	133
	134
	135	void offchannel_send_action_tx_status(
	136	struct wpa_supplicant wpa_s, const u8 dst, const u8 *data,
	137	size_t data_len, enum offchannel_send_action_result result)
	138	{
	139	if (wpa_s->pending_action_tx == NULL) {
	140	wpa_printf(MSG_DEBUG, "Off-channel: Ignore Action TX status - "
	141	"no pending operation");
	142	return;
	143	}
	144
	145	if (os_memcmp(dst, wpa_s->pending_action_dst, ETH_ALEN) != 0) {
	146	wpa_printf(MSG_DEBUG, "Off-channel: Ignore Action TX status - "
	147	"unknown destination address");
	148	return;
	149	}
	150
	151	wpabuf_free(wpa_s->pending_action_tx);
	152	wpa_s->pending_action_tx = NULL;
	153
	154	wpa_printf(MSG_DEBUG, "Off-channel: TX status result=%d cb=%p",
	155	result, wpa_s->pending_action_tx_status_cb);
	156
	157	if (wpa_s->pending_action_tx_status_cb) {
	158	wpa_s->pending_action_tx_status_cb(
	159	wpa_s, wpa_s->pending_action_freq,
	160	wpa_s->pending_action_dst, wpa_s->pending_action_src,
	161	wpa_s->pending_action_bssid,
	162	data, data_len, result);
	163	}
	164	}
	165
	166
	167	int offchannel_send_action(struct wpa_supplicant *wpa_s, unsigned int freq,
	168	const u8 dst, const u8 src, const u8 *bssid,
	169	const u8 *buf, size_t len, unsigned int wait_time,
	170	void (tx_cb)(struct wpa_supplicant wpa_s,
	171	unsigned int freq, const u8 *dst,
	172	const u8 src, const u8 bssid,
	173	const u8 *data, size_t data_len,
	174	enum offchannel_send_action_result
b106173a JM	175	result),
b106173a JM	176	int no_cck)
24f6497c JM	177	{
	178	wpa_printf(MSG_DEBUG, "Off-channel: Send action frame: freq=%d dst="
	179	MACSTR " src=" MACSTR " bssid=" MACSTR " len=%d",
	180	freq, MAC2STR(dst), MAC2STR(src), MAC2STR(bssid),
	181	(int) len);
	182
	183	wpa_s->pending_action_tx_status_cb = tx_cb;
	184
	185	if (wpa_s->pending_action_tx) {
	186	wpa_printf(MSG_DEBUG, "Off-channel: Dropped pending Action "
	187	"frame TX to " MACSTR,
	188	MAC2STR(wpa_s->pending_action_dst));
	189	wpabuf_free(wpa_s->pending_action_tx);
	190	}
	191	wpa_s->pending_action_tx = wpabuf_alloc(len);
	192	if (wpa_s->pending_action_tx == NULL) {
	193	wpa_printf(MSG_DEBUG, "Off-channel: Failed to allocate Action "
	194	"frame TX buffer (len=%llu)",
	195	(unsigned long long) len);
	196	return -1;
	197	}
	198	wpabuf_put_data(wpa_s->pending_action_tx, buf, len);
	199	os_memcpy(wpa_s->pending_action_src, src, ETH_ALEN);
	200	os_memcpy(wpa_s->pending_action_dst, dst, ETH_ALEN);
	201	os_memcpy(wpa_s->pending_action_bssid, bssid, ETH_ALEN);
	202	wpa_s->pending_action_freq = freq;
b106173a	203	wpa_s->pending_action_no_cck = no_cck;
24f6497c JM	204
	205	if (freq != 0 && wpa_s->drv_flags & WPA_DRIVER_FLAGS_OFFCHANNEL_TX) {
	206	struct wpa_supplicant *iface;
	207
	208	iface = wpas_get_tx_interface(wpa_s,
	209	wpa_s->pending_action_src);
	210	wpa_s->action_tx_wait_time = wait_time;
	211
b106173a JM	212	return wpa_drv_send_action(
	213	iface, wpa_s->pending_action_freq,
	214	wait_time, wpa_s->pending_action_dst,
	215	wpa_s->pending_action_src, wpa_s->pending_action_bssid,
	216	wpabuf_head(wpa_s->pending_action_tx),
	217	wpabuf_len(wpa_s->pending_action_tx),
	218	wpa_s->pending_action_no_cck);
24f6497c JM	219	}
	220
	221	if (freq) {
	222	struct wpa_supplicant *tx_iface;
	223	tx_iface = wpas_get_tx_interface(wpa_s, src);
	224	if (tx_iface->assoc_freq == freq) {
	225	wpa_printf(MSG_DEBUG, "Off-channel: Already on "
	226	"requested channel (TX interface operating "
	227	"channel)");
	228	freq = 0;
	229	}
	230	}
	231
	232	if (wpa_s->off_channel_freq == freq \|\| freq == 0) {
	233	wpa_printf(MSG_DEBUG, "Off-channel: Already on requested "
	234	"channel; send Action frame immediately");
	235	/* TODO: Would there ever be need to extend the current
	236	* duration on the channel? */
	237	wpa_s->pending_action_without_roc = 1;
	238	eloop_cancel_timeout(wpas_send_action_cb, wpa_s, NULL);
	239	eloop_register_timeout(0, 0, wpas_send_action_cb, wpa_s, NULL);
	240	return 0;
	241	}
	242	wpa_s->pending_action_without_roc = 0;
	243
	244	if (wpa_s->roc_waiting_drv_freq == freq) {
	245	wpa_printf(MSG_DEBUG, "Off-channel: Already waiting for "
	246	"driver to get to frequency %u MHz; continue "
	247	"waiting to send the Action frame", freq);
	248	return 0;
	249	}
	250
	251	wpa_printf(MSG_DEBUG, "Off-channel: Schedule Action frame to be "
	252	"transmitted once the driver gets to the requested "
	253	"channel");
	254	if (wait_time > wpa_s->max_remain_on_chan)
	255	wait_time = wpa_s->max_remain_on_chan;
	256	if (wpa_drv_remain_on_channel(wpa_s, freq, wait_time) < 0) {
	257	wpa_printf(MSG_DEBUG, "Off-channel: Failed to request driver "
	258	"to remain on channel (%u MHz) for Action "
	259	"Frame TX", freq);
	260	return -1;
	261	}
	262	wpa_s->off_channel_freq = 0;
	263	wpa_s->roc_waiting_drv_freq = freq;
	264
	265	return 0;
	266	}
	267
	268
	269	void offchannel_send_action_done(struct wpa_supplicant *wpa_s)
	270	{
	271	wpa_printf(MSG_DEBUG, "Off-channel: Action frame sequence done "
	272	"notification");
	273	wpabuf_free(wpa_s->pending_action_tx);
	274	wpa_s->pending_action_tx = NULL;
	275	if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_OFFCHANNEL_TX &&
	276	wpa_s->action_tx_wait_time)
	277	wpa_drv_send_action_cancel_wait(wpa_s);
	278
	279	if (wpa_s->off_channel_freq \|\| wpa_s->roc_waiting_drv_freq) {
	280	wpa_drv_cancel_remain_on_channel(wpa_s);
	281	wpa_s->off_channel_freq = 0;
	282	wpa_s->roc_waiting_drv_freq = 0;
283	}
284	}
285
286
287	void offchannel_remain_on_channel_cb(struct wpa_supplicant *wpa_s,
288	unsigned int freq, unsigned int duration)
289	{
290	wpa_s->roc_waiting_drv_freq = 0;
291	wpa_s->off_channel_freq = freq;
292	wpas_send_action_cb(wpa_s, NULL);
293	}
294
295
296	void offchannel_cancel_remain_on_channel_cb(struct wpa_supplicant *wpa_s,
297	unsigned int freq)
298	{
299	wpa_s->off_channel_freq = 0;
300	}
301
302
303	void offchannel_deinit(struct wpa_supplicant *wpa_s)
304	{
305	wpabuf_free(wpa_s->pending_action_tx);
306	wpa_s->pending_action_tx = NULL;
307	eloop_cancel_timeout(wpas_send_action_cb, wpa_s, NULL);
308	}