2 * Generic advertisement service (GAS) query
3 * Copyright (c) 2009, Atheros Communications
4 * Copyright (c) 2011-2014, Qualcomm Atheros, Inc.
5 * Copyright (c) 2011-2014, Jouni Malinen <j@w1.fi>
7 * This software may be distributed under the terms of the BSD license.
8 * See README for more details.
14 #include "utils/eloop.h"
15 #include "common/ieee802_11_defs.h"
16 #include "common/gas.h"
17 #include "common/wpa_ctrl.h"
18 #include "rsn_supp/wpa.h"
19 #include "wpa_supplicant_i.h"
22 #include "offchannel.h"
23 #include "gas_query.h"
26 /** GAS query timeout in seconds */
27 #define GAS_QUERY_TIMEOUT_PERIOD 2
29 /* GAS query wait-time / duration in ms */
30 #define GAS_QUERY_WAIT_TIME_INITIAL 1000
31 #define GAS_QUERY_WAIT_TIME_COMEBACK 150
34 * struct gas_query_pending - Pending GAS query
36 struct gas_query_pending {
38 struct gas_query *gas;
42 unsigned int wait_comeback:1;
43 unsigned int offchannel_tx_started:1;
48 struct wpabuf *adv_proto;
50 struct os_reltime last_oper;
51 void (*cb)(void *ctx, const u8 *dst, u8 dialog_token,
52 enum gas_query_result result,
53 const struct wpabuf *adv_proto,
54 const struct wpabuf *resp, u16 status_code);
59 * struct gas_query - Internal GAS query data
62 struct wpa_supplicant *wpa_s;
63 struct dl_list pending; /* struct gas_query_pending */
64 struct gas_query_pending *current;
65 struct wpa_radio_work *work;
69 static void gas_query_tx_comeback_timeout(void *eloop_data, void *user_ctx);
70 static void gas_query_timeout(void *eloop_data, void *user_ctx);
71 static void gas_query_rx_comeback_timeout(void *eloop_data, void *user_ctx);
72 static void gas_query_tx_initial_req(struct gas_query *gas,
73 struct gas_query_pending *query);
74 static int gas_query_new_dialog_token(struct gas_query *gas, const u8 *dst);
77 static int ms_from_time(struct os_reltime *last)
79 struct os_reltime now, res;
82 os_reltime_sub(&now, last, &res);
83 return res.sec * 1000 + res.usec / 1000;
88 * gas_query_init - Initialize GAS query component
89 * @wpa_s: Pointer to wpa_supplicant data
90 * Returns: Pointer to GAS query data or %NULL on failure
92 struct gas_query * gas_query_init(struct wpa_supplicant *wpa_s)
94 struct gas_query *gas;
96 gas = os_zalloc(sizeof(*gas));
101 dl_list_init(&gas->pending);
107 static const char * gas_result_txt(enum gas_query_result result)
110 case GAS_QUERY_SUCCESS:
112 case GAS_QUERY_FAILURE:
114 case GAS_QUERY_TIMEOUT:
116 case GAS_QUERY_PEER_ERROR:
118 case GAS_QUERY_INTERNAL_ERROR:
119 return "INTERNAL_ERROR";
120 case GAS_QUERY_CANCELLED:
122 case GAS_QUERY_DELETED_AT_DEINIT:
123 return "DELETED_AT_DEINIT";
130 static void gas_query_free(struct gas_query_pending *query, int del_list)
132 struct gas_query *gas = query->gas;
135 dl_list_del(&query->list);
137 if (gas->work && gas->work->ctx == query) {
138 radio_work_done(gas->work);
142 wpabuf_free(query->req);
143 wpabuf_free(query->adv_proto);
144 wpabuf_free(query->resp);
149 static void gas_query_done(struct gas_query *gas,
150 struct gas_query_pending *query,
151 enum gas_query_result result)
153 wpa_msg(gas->wpa_s, MSG_INFO, GAS_QUERY_DONE "addr=" MACSTR
154 " dialog_token=%u freq=%d status_code=%u result=%s",
155 MAC2STR(query->addr), query->dialog_token, query->freq,
156 query->status_code, gas_result_txt(result));
157 if (gas->current == query)
159 if (query->offchannel_tx_started)
160 offchannel_send_action_done(gas->wpa_s);
161 eloop_cancel_timeout(gas_query_tx_comeback_timeout, gas, query);
162 eloop_cancel_timeout(gas_query_timeout, gas, query);
163 eloop_cancel_timeout(gas_query_rx_comeback_timeout, gas, query);
164 dl_list_del(&query->list);
165 query->cb(query->ctx, query->addr, query->dialog_token, result,
166 query->adv_proto, query->resp, query->status_code);
167 gas_query_free(query, 0);
172 * gas_query_deinit - Deinitialize GAS query component
173 * @gas: GAS query data from gas_query_init()
175 void gas_query_deinit(struct gas_query *gas)
177 struct gas_query_pending *query, *next;
182 dl_list_for_each_safe(query, next, &gas->pending,
183 struct gas_query_pending, list)
184 gas_query_done(gas, query, GAS_QUERY_DELETED_AT_DEINIT);
190 static struct gas_query_pending *
191 gas_query_get_pending(struct gas_query *gas, const u8 *addr, u8 dialog_token)
193 struct gas_query_pending *q;
194 dl_list_for_each(q, &gas->pending, struct gas_query_pending, list) {
195 if (os_memcmp(q->addr, addr, ETH_ALEN) == 0 &&
196 q->dialog_token == dialog_token)
203 static int gas_query_append(struct gas_query_pending *query, const u8 *data,
206 if (wpabuf_resize(&query->resp, len) < 0) {
207 wpa_printf(MSG_DEBUG, "GAS: No memory to store the response");
210 wpabuf_put_data(query->resp, data, len);
215 static void gas_query_tx_status(struct wpa_supplicant *wpa_s,
216 unsigned int freq, const u8 *dst,
217 const u8 *src, const u8 *bssid,
218 const u8 *data, size_t data_len,
219 enum offchannel_send_action_result result)
221 struct gas_query_pending *query;
222 struct gas_query *gas = wpa_s->gas;
225 if (gas->current == NULL) {
226 wpa_printf(MSG_DEBUG, "GAS: Unexpected TX status: freq=%u dst="
227 MACSTR " result=%d - no query in progress",
228 freq, MAC2STR(dst), result);
232 query = gas->current;
234 dur = ms_from_time(&query->last_oper);
235 wpa_printf(MSG_DEBUG, "GAS: TX status: freq=%u dst=" MACSTR
236 " result=%d query=%p dialog_token=%u dur=%d ms",
237 freq, MAC2STR(dst), result, query, query->dialog_token, dur);
238 if (os_memcmp(dst, query->addr, ETH_ALEN) != 0) {
239 wpa_printf(MSG_DEBUG, "GAS: TX status for unexpected destination");
242 os_get_reltime(&query->last_oper);
244 if (result == OFFCHANNEL_SEND_ACTION_SUCCESS) {
245 eloop_cancel_timeout(gas_query_timeout, gas, query);
246 eloop_register_timeout(GAS_QUERY_TIMEOUT_PERIOD, 0,
247 gas_query_timeout, gas, query);
248 if (query->wait_comeback && !query->retry) {
249 eloop_cancel_timeout(gas_query_rx_comeback_timeout,
251 eloop_register_timeout(
252 0, (GAS_QUERY_WAIT_TIME_COMEBACK + 10) * 1000,
253 gas_query_rx_comeback_timeout, gas, query);
256 if (result == OFFCHANNEL_SEND_ACTION_FAILED) {
257 eloop_cancel_timeout(gas_query_timeout, gas, query);
258 eloop_register_timeout(0, 0, gas_query_timeout, gas, query);
263 static int pmf_in_use(struct wpa_supplicant *wpa_s, const u8 *addr)
265 if (wpa_s->current_ssid == NULL ||
266 wpa_s->wpa_state < WPA_4WAY_HANDSHAKE ||
267 os_memcmp(addr, wpa_s->bssid, ETH_ALEN) != 0)
269 return wpa_sm_pmf_enabled(wpa_s->wpa);
273 static int gas_query_tx(struct gas_query *gas, struct gas_query_pending *query,
274 struct wpabuf *req, unsigned int wait_time)
276 int res, prot = pmf_in_use(gas->wpa_s, query->addr);
278 const u8 wildcard_bssid[ETH_ALEN] = {
279 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
282 wpa_printf(MSG_DEBUG, "GAS: Send action frame to " MACSTR " len=%u "
283 "freq=%d prot=%d", MAC2STR(query->addr),
284 (unsigned int) wpabuf_len(req), query->freq, prot);
286 u8 *categ = wpabuf_mhead_u8(req);
287 *categ = WLAN_ACTION_PROTECTED_DUAL;
289 os_get_reltime(&query->last_oper);
290 if (gas->wpa_s->max_remain_on_chan &&
291 wait_time > gas->wpa_s->max_remain_on_chan)
292 wait_time = gas->wpa_s->max_remain_on_chan;
293 if (!gas->wpa_s->conf->gas_address3 ||
294 (gas->wpa_s->current_ssid &&
295 gas->wpa_s->wpa_state >= WPA_ASSOCIATED &&
296 os_memcmp(query->addr, gas->wpa_s->bssid, ETH_ALEN) == 0))
299 bssid = wildcard_bssid;
300 res = offchannel_send_action(gas->wpa_s, query->freq, query->addr,
301 gas->wpa_s->own_addr, bssid,
302 wpabuf_head(req), wpabuf_len(req),
303 wait_time, gas_query_tx_status, 0);
305 query->offchannel_tx_started = 1;
310 static void gas_query_tx_comeback_req(struct gas_query *gas,
311 struct gas_query_pending *query)
314 unsigned int wait_time;
316 req = gas_build_comeback_req(query->dialog_token);
318 gas_query_done(gas, query, GAS_QUERY_INTERNAL_ERROR);
322 wait_time = (query->retry || !query->offchannel_tx_started) ?
323 GAS_QUERY_WAIT_TIME_INITIAL : GAS_QUERY_WAIT_TIME_COMEBACK;
325 if (gas_query_tx(gas, query, req, wait_time) < 0) {
326 wpa_printf(MSG_DEBUG, "GAS: Failed to send Action frame to "
327 MACSTR, MAC2STR(query->addr));
328 gas_query_done(gas, query, GAS_QUERY_INTERNAL_ERROR);
335 static void gas_query_rx_comeback_timeout(void *eloop_data, void *user_ctx)
337 struct gas_query *gas = eloop_data;
338 struct gas_query_pending *query = user_ctx;
341 wpa_printf(MSG_DEBUG,
342 "GAS: No response to comeback request received (retry=%u)",
344 if (gas->current != query || query->retry)
346 dialog_token = gas_query_new_dialog_token(gas, query->addr);
347 if (dialog_token < 0)
349 wpa_printf(MSG_DEBUG,
350 "GAS: Retry GAS query due to comeback response timeout");
352 query->dialog_token = dialog_token;
353 *(wpabuf_mhead_u8(query->req) + 2) = dialog_token;
354 query->wait_comeback = 0;
355 query->next_frag_id = 0;
356 wpabuf_free(query->adv_proto);
357 query->adv_proto = NULL;
358 eloop_cancel_timeout(gas_query_tx_comeback_timeout, gas, query);
359 eloop_cancel_timeout(gas_query_timeout, gas, query);
360 gas_query_tx_initial_req(gas, query);
364 static void gas_query_tx_comeback_timeout(void *eloop_data, void *user_ctx)
366 struct gas_query *gas = eloop_data;
367 struct gas_query_pending *query = user_ctx;
369 wpa_printf(MSG_DEBUG, "GAS: Comeback timeout for request to " MACSTR,
370 MAC2STR(query->addr));
371 gas_query_tx_comeback_req(gas, query);
375 static void gas_query_tx_comeback_req_delay(struct gas_query *gas,
376 struct gas_query_pending *query,
379 unsigned int secs, usecs;
381 if (comeback_delay > 1 && query->offchannel_tx_started) {
382 offchannel_send_action_done(gas->wpa_s);
383 query->offchannel_tx_started = 0;
386 secs = (comeback_delay * 1024) / 1000000;
387 usecs = comeback_delay * 1024 - secs * 1000000;
388 wpa_printf(MSG_DEBUG, "GAS: Send comeback request to " MACSTR
389 " in %u secs %u usecs", MAC2STR(query->addr), secs, usecs);
390 eloop_cancel_timeout(gas_query_tx_comeback_timeout, gas, query);
391 eloop_register_timeout(secs, usecs, gas_query_tx_comeback_timeout,
396 static void gas_query_rx_initial(struct gas_query *gas,
397 struct gas_query_pending *query,
398 const u8 *adv_proto, const u8 *resp,
399 size_t len, u16 comeback_delay)
401 wpa_printf(MSG_DEBUG, "GAS: Received initial response from "
402 MACSTR " (dialog_token=%u comeback_delay=%u)",
403 MAC2STR(query->addr), query->dialog_token, comeback_delay);
405 query->adv_proto = wpabuf_alloc_copy(adv_proto, 2 + adv_proto[1]);
406 if (query->adv_proto == NULL) {
407 gas_query_done(gas, query, GAS_QUERY_INTERNAL_ERROR);
411 if (comeback_delay) {
412 query->wait_comeback = 1;
413 gas_query_tx_comeback_req_delay(gas, query, comeback_delay);
417 /* Query was completed without comeback mechanism */
418 if (gas_query_append(query, resp, len) < 0) {
419 gas_query_done(gas, query, GAS_QUERY_INTERNAL_ERROR);
423 gas_query_done(gas, query, GAS_QUERY_SUCCESS);
427 static void gas_query_rx_comeback(struct gas_query *gas,
428 struct gas_query_pending *query,
429 const u8 *adv_proto, const u8 *resp,
430 size_t len, u8 frag_id, u8 more_frags,
433 wpa_printf(MSG_DEBUG, "GAS: Received comeback response from "
434 MACSTR " (dialog_token=%u frag_id=%u more_frags=%u "
435 "comeback_delay=%u)",
436 MAC2STR(query->addr), query->dialog_token, frag_id,
437 more_frags, comeback_delay);
438 eloop_cancel_timeout(gas_query_rx_comeback_timeout, gas, query);
440 if ((size_t) 2 + adv_proto[1] != wpabuf_len(query->adv_proto) ||
441 os_memcmp(adv_proto, wpabuf_head(query->adv_proto),
442 wpabuf_len(query->adv_proto)) != 0) {
443 wpa_printf(MSG_DEBUG, "GAS: Advertisement Protocol changed "
444 "between initial and comeback response from "
445 MACSTR, MAC2STR(query->addr));
446 gas_query_done(gas, query, GAS_QUERY_PEER_ERROR);
450 if (comeback_delay) {
452 wpa_printf(MSG_DEBUG, "GAS: Invalid comeback response "
453 "with non-zero frag_id and comeback_delay "
454 "from " MACSTR, MAC2STR(query->addr));
455 gas_query_done(gas, query, GAS_QUERY_PEER_ERROR);
458 gas_query_tx_comeback_req_delay(gas, query, comeback_delay);
462 if (frag_id != query->next_frag_id) {
463 wpa_printf(MSG_DEBUG, "GAS: Unexpected frag_id in response "
464 "from " MACSTR, MAC2STR(query->addr));
465 if (frag_id + 1 == query->next_frag_id) {
466 wpa_printf(MSG_DEBUG, "GAS: Drop frame as possible "
467 "retry of previous fragment");
470 gas_query_done(gas, query, GAS_QUERY_PEER_ERROR);
473 query->next_frag_id++;
475 if (gas_query_append(query, resp, len) < 0) {
476 gas_query_done(gas, query, GAS_QUERY_INTERNAL_ERROR);
481 gas_query_tx_comeback_req(gas, query);
485 gas_query_done(gas, query, GAS_QUERY_SUCCESS);
490 * gas_query_rx - Indicate reception of a Public Action or Protected Dual frame
491 * @gas: GAS query data from gas_query_init()
492 * @da: Destination MAC address of the Action frame
493 * @sa: Source MAC address of the Action frame
494 * @bssid: BSSID of the Action frame
495 * @categ: Category of the Action frame
496 * @data: Payload of the Action frame
497 * @len: Length of @data
498 * @freq: Frequency (in MHz) on which the frame was received
499 * Returns: 0 if the Public Action frame was a GAS frame or -1 if not
501 int gas_query_rx(struct gas_query *gas, const u8 *da, const u8 *sa,
502 const u8 *bssid, u8 categ, const u8 *data, size_t len,
505 struct gas_query_pending *query;
506 u8 action, dialog_token, frag_id = 0, more_frags = 0;
507 u16 comeback_delay, resp_len;
508 const u8 *pos, *adv_proto;
512 if (gas == NULL || len < 4)
517 dialog_token = *pos++;
519 if (action != WLAN_PA_GAS_INITIAL_RESP &&
520 action != WLAN_PA_GAS_COMEBACK_RESP)
521 return -1; /* Not a GAS response */
523 prot = categ == WLAN_ACTION_PROTECTED_DUAL;
524 pmf = pmf_in_use(gas->wpa_s, sa);
526 wpa_printf(MSG_DEBUG, "GAS: Drop unexpected protected GAS frame when PMF is disabled");
530 wpa_printf(MSG_DEBUG, "GAS: Drop unexpected unprotected GAS frame when PMF is enabled");
534 query = gas_query_get_pending(gas, sa, dialog_token);
536 wpa_printf(MSG_DEBUG, "GAS: No pending query found for " MACSTR
537 " dialog token %u", MAC2STR(sa), dialog_token);
541 wpa_printf(MSG_DEBUG, "GAS: Response in %d ms from " MACSTR,
542 ms_from_time(&query->last_oper), MAC2STR(sa));
544 if (query->wait_comeback && action == WLAN_PA_GAS_INITIAL_RESP) {
545 wpa_printf(MSG_DEBUG, "GAS: Unexpected initial response from "
546 MACSTR " dialog token %u when waiting for comeback "
547 "response", MAC2STR(sa), dialog_token);
551 if (!query->wait_comeback && action == WLAN_PA_GAS_COMEBACK_RESP) {
552 wpa_printf(MSG_DEBUG, "GAS: Unexpected comeback response from "
553 MACSTR " dialog token %u when waiting for initial "
554 "response", MAC2STR(sa), dialog_token);
558 query->status_code = WPA_GET_LE16(pos);
561 if (query->status_code == WLAN_STATUS_QUERY_RESP_OUTSTANDING &&
562 action == WLAN_PA_GAS_COMEBACK_RESP) {
563 wpa_printf(MSG_DEBUG, "GAS: Allow non-zero status for outstanding comeback response");
564 } else if (query->status_code != WLAN_STATUS_SUCCESS) {
565 wpa_printf(MSG_DEBUG, "GAS: Query to " MACSTR " dialog token "
566 "%u failed - status code %u",
567 MAC2STR(sa), dialog_token, query->status_code);
568 gas_query_done(gas, query, GAS_QUERY_FAILURE);
572 if (action == WLAN_PA_GAS_COMEBACK_RESP) {
573 if (pos + 1 > data + len)
575 frag_id = *pos & 0x7f;
576 more_frags = (*pos & 0x80) >> 7;
581 if (pos + 2 > data + len)
583 comeback_delay = WPA_GET_LE16(pos);
586 /* Advertisement Protocol element */
587 if (pos + 2 > data + len || pos + 2 + pos[1] > data + len) {
588 wpa_printf(MSG_DEBUG, "GAS: No room for Advertisement "
589 "Protocol element in the response from " MACSTR,
594 if (*pos != WLAN_EID_ADV_PROTO) {
595 wpa_printf(MSG_DEBUG, "GAS: Unexpected Advertisement "
596 "Protocol element ID %u in response from " MACSTR,
604 /* Query Response Length */
605 if (pos + 2 > data + len) {
606 wpa_printf(MSG_DEBUG, "GAS: No room for GAS Response Length");
609 resp_len = WPA_GET_LE16(pos);
612 left = data + len - pos;
613 if (resp_len > left) {
614 wpa_printf(MSG_DEBUG, "GAS: Truncated Query Response in "
615 "response from " MACSTR, MAC2STR(sa));
619 if (resp_len < left) {
620 wpa_printf(MSG_DEBUG, "GAS: Ignore %u octets of extra data "
621 "after Query Response from " MACSTR,
622 left - resp_len, MAC2STR(sa));
625 if (action == WLAN_PA_GAS_COMEBACK_RESP)
626 gas_query_rx_comeback(gas, query, adv_proto, pos, resp_len,
627 frag_id, more_frags, comeback_delay);
629 gas_query_rx_initial(gas, query, adv_proto, pos, resp_len,
636 static void gas_query_timeout(void *eloop_data, void *user_ctx)
638 struct gas_query *gas = eloop_data;
639 struct gas_query_pending *query = user_ctx;
641 wpa_printf(MSG_DEBUG, "GAS: No response received for query to " MACSTR
643 MAC2STR(query->addr), query->dialog_token);
644 gas_query_done(gas, query, GAS_QUERY_TIMEOUT);
648 static int gas_query_dialog_token_available(struct gas_query *gas,
649 const u8 *dst, u8 dialog_token)
651 struct gas_query_pending *q;
652 dl_list_for_each(q, &gas->pending, struct gas_query_pending, list) {
653 if (os_memcmp(dst, q->addr, ETH_ALEN) == 0 &&
654 dialog_token == q->dialog_token)
662 static void gas_query_start_cb(struct wpa_radio_work *work, int deinit)
664 struct gas_query_pending *query = work->ctx;
665 struct gas_query *gas = query->gas;
666 struct wpa_supplicant *wpa_s = gas->wpa_s;
671 gas_query_done(gas, query, GAS_QUERY_DELETED_AT_DEINIT);
675 gas_query_free(query, 1);
679 if (wpas_update_random_addr_disassoc(wpa_s) < 0) {
680 wpa_msg(wpa_s, MSG_INFO,
681 "Failed to assign random MAC address for GAS");
682 gas_query_free(query, 1);
683 radio_work_done(work);
688 gas_query_tx_initial_req(gas, query);
692 static void gas_query_tx_initial_req(struct gas_query *gas,
693 struct gas_query_pending *query)
695 if (gas_query_tx(gas, query, query->req,
696 GAS_QUERY_WAIT_TIME_INITIAL) < 0) {
697 wpa_printf(MSG_DEBUG, "GAS: Failed to send Action frame to "
698 MACSTR, MAC2STR(query->addr));
699 gas_query_done(gas, query, GAS_QUERY_INTERNAL_ERROR);
702 gas->current = query;
704 wpa_printf(MSG_DEBUG, "GAS: Starting query timeout for dialog token %u",
705 query->dialog_token);
706 eloop_register_timeout(GAS_QUERY_TIMEOUT_PERIOD, 0,
707 gas_query_timeout, gas, query);
711 static int gas_query_new_dialog_token(struct gas_query *gas, const u8 *dst)
713 static int next_start = 0;
716 for (dialog_token = 0; dialog_token < 256; dialog_token++) {
717 if (gas_query_dialog_token_available(
718 gas, dst, (next_start + dialog_token) % 256))
721 if (dialog_token == 256)
722 return -1; /* Too many pending queries */
723 dialog_token = (next_start + dialog_token) % 256;
724 next_start = (dialog_token + 1) % 256;
730 * gas_query_req - Request a GAS query
731 * @gas: GAS query data from gas_query_init()
732 * @dst: Destination MAC address for the query
733 * @freq: Frequency (in MHz) for the channel on which to send the query
734 * @req: GAS query payload (to be freed by gas_query module in case of success
736 * @cb: Callback function for reporting GAS query result and response
737 * @ctx: Context pointer to use with the @cb call
738 * Returns: dialog token (>= 0) on success or -1 on failure
740 int gas_query_req(struct gas_query *gas, const u8 *dst, int freq,
742 void (*cb)(void *ctx, const u8 *dst, u8 dialog_token,
743 enum gas_query_result result,
744 const struct wpabuf *adv_proto,
745 const struct wpabuf *resp, u16 status_code),
748 struct gas_query_pending *query;
751 if (wpabuf_len(req) < 3)
754 dialog_token = gas_query_new_dialog_token(gas, dst);
755 if (dialog_token < 0)
758 query = os_zalloc(sizeof(*query));
763 os_memcpy(query->addr, dst, ETH_ALEN);
764 query->dialog_token = dialog_token;
769 dl_list_add(&gas->pending, &query->list);
771 *(wpabuf_mhead_u8(req) + 2) = dialog_token;
773 wpa_msg(gas->wpa_s, MSG_INFO, GAS_QUERY_START "addr=" MACSTR
774 " dialog_token=%u freq=%d",
775 MAC2STR(query->addr), query->dialog_token, query->freq);
777 if (radio_add_work(gas->wpa_s, freq, "gas-query", 0, gas_query_start_cb,
779 gas_query_free(query, 1);
788 * gas_query_cancel - Cancel a pending GAS query
789 * @gas: GAS query data from gas_query_init()
790 * @dst: Destination MAC address for the query
791 * @dialog_token: Dialog token from gas_query_req()
793 void gas_query_cancel(struct gas_query *gas, const u8 *dst, u8 dialog_token)
795 struct gas_query_pending *query;
797 query = gas_query_get_pending(gas, dst, dialog_token);
799 gas_query_done(gas, query, GAS_QUERY_CANCELLED);