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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. |
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" | |
49e1e9ca | 15 | #include "p2p_supplicant.h" |
24f6497c JM |
16 | #include "driver_i.h" |
17 | #include "offchannel.h" | |
18 | ||
19 | ||
20 | ||
21 | static struct wpa_supplicant * | |
22 | wpas_get_tx_interface(struct wpa_supplicant *wpa_s, const u8 *src) | |
23 | { | |
24 | struct wpa_supplicant *iface; | |
25 | ||
a26c9c2e LD |
26 | if (os_memcmp(src, wpa_s->own_addr, ETH_ALEN) == 0) { |
27 | #ifdef CONFIG_P2P | |
28 | if (wpa_s->p2p_mgmt && wpa_s != wpa_s->parent && | |
29 | wpa_s->parent->ap_iface && | |
30 | os_memcmp(wpa_s->parent->own_addr, | |
31 | wpa_s->own_addr, ETH_ALEN) == 0 && | |
32 | wpabuf_len(wpa_s->pending_action_tx) >= 2 && | |
33 | *wpabuf_head_u8(wpa_s->pending_action_tx) != | |
34 | WLAN_ACTION_PUBLIC) { | |
35 | /* | |
36 | * When P2P Device interface has same MAC address as | |
37 | * the GO interface, make sure non-Public Action frames | |
38 | * are sent through the GO interface. The P2P Device | |
39 | * interface can only send Public Action frames. | |
40 | */ | |
41 | wpa_printf(MSG_DEBUG, | |
42 | "P2P: Use GO interface %s instead of interface %s for Action TX", | |
43 | wpa_s->parent->ifname, wpa_s->ifname); | |
44 | return wpa_s->parent; | |
45 | } | |
46 | #endif /* CONFIG_P2P */ | |
24f6497c | 47 | return wpa_s; |
a26c9c2e | 48 | } |
24f6497c JM |
49 | |
50 | /* | |
51 | * Try to find a group interface that matches with the source address. | |
52 | */ | |
53 | iface = wpa_s->global->ifaces; | |
54 | while (iface) { | |
8e3afd7f | 55 | if (os_memcmp(src, iface->own_addr, ETH_ALEN) == 0) |
24f6497c JM |
56 | break; |
57 | iface = iface->next; | |
58 | } | |
59 | if (iface) { | |
60 | wpa_printf(MSG_DEBUG, "P2P: Use group interface %s " | |
61 | "instead of interface %s for Action TX", | |
62 | iface->ifname, wpa_s->ifname); | |
63 | return iface; | |
64 | } | |
65 | ||
66 | return wpa_s; | |
67 | } | |
68 | ||
69 | ||
70 | static void wpas_send_action_cb(void *eloop_ctx, void *timeout_ctx) | |
71 | { | |
72 | struct wpa_supplicant *wpa_s = eloop_ctx; | |
73 | struct wpa_supplicant *iface; | |
74 | int res; | |
75 | int without_roc; | |
76 | ||
77 | without_roc = wpa_s->pending_action_without_roc; | |
78 | wpa_s->pending_action_without_roc = 0; | |
d4b951f3 JM |
79 | wpa_printf(MSG_DEBUG, |
80 | "Off-channel: Send Action callback (without_roc=%d pending_action_tx=%p pending_action_tx_done=%d)", | |
81 | without_roc, wpa_s->pending_action_tx, | |
82 | !!wpa_s->pending_action_tx_done); | |
24f6497c | 83 | |
d4b951f3 | 84 | if (wpa_s->pending_action_tx == NULL || wpa_s->pending_action_tx_done) |
24f6497c JM |
85 | return; |
86 | ||
87 | /* | |
88 | * This call is likely going to be on the P2P device instance if the | |
89 | * driver uses a separate interface for that purpose. However, some | |
90 | * Action frames are actually sent within a P2P Group and when that is | |
91 | * the case, we need to follow power saving (e.g., GO buffering the | |
92 | * frame for a client in PS mode or a client following the advertised | |
93 | * NoA from its GO). To make that easier for the driver, select the | |
94 | * correct group interface here. | |
95 | */ | |
96 | iface = wpas_get_tx_interface(wpa_s, wpa_s->pending_action_src); | |
97 | ||
98 | if (wpa_s->off_channel_freq != wpa_s->pending_action_freq && | |
99 | wpa_s->pending_action_freq != 0 && | |
100 | wpa_s->pending_action_freq != iface->assoc_freq) { | |
101 | wpa_printf(MSG_DEBUG, "Off-channel: Pending Action frame TX " | |
102 | "waiting for another freq=%u (off_channel_freq=%u " | |
103 | "assoc_freq=%u)", | |
104 | wpa_s->pending_action_freq, | |
105 | wpa_s->off_channel_freq, | |
106 | iface->assoc_freq); | |
107 | if (without_roc && wpa_s->off_channel_freq == 0) { | |
1f94e4ee | 108 | unsigned int duration = 200; |
24f6497c JM |
109 | /* |
110 | * We may get here if wpas_send_action() found us to be | |
111 | * on the correct channel, but remain-on-channel cancel | |
112 | * event was received before getting here. | |
113 | */ | |
114 | wpa_printf(MSG_DEBUG, "Off-channel: Schedule " | |
115 | "remain-on-channel to send Action frame"); | |
1f94e4ee JM |
116 | #ifdef CONFIG_TESTING_OPTIONS |
117 | if (wpa_s->extra_roc_dur) { | |
118 | wpa_printf(MSG_DEBUG, | |
119 | "TESTING: Increase ROC duration %u -> %u", | |
120 | duration, | |
121 | duration + wpa_s->extra_roc_dur); | |
122 | duration += wpa_s->extra_roc_dur; | |
123 | } | |
124 | #endif /* CONFIG_TESTING_OPTIONS */ | |
24f6497c | 125 | if (wpa_drv_remain_on_channel( |
1f94e4ee JM |
126 | wpa_s, wpa_s->pending_action_freq, |
127 | duration) < 0) { | |
24f6497c JM |
128 | wpa_printf(MSG_DEBUG, "Off-channel: Failed to " |
129 | "request driver to remain on " | |
130 | "channel (%u MHz) for Action Frame " | |
131 | "TX", wpa_s->pending_action_freq); | |
132 | } else { | |
133 | wpa_s->off_channel_freq = 0; | |
134 | wpa_s->roc_waiting_drv_freq = | |
135 | wpa_s->pending_action_freq; | |
136 | } | |
137 | } | |
138 | return; | |
139 | } | |
140 | ||
141 | wpa_printf(MSG_DEBUG, "Off-channel: Sending pending Action frame to " | |
e699a7a9 JM |
142 | MACSTR " using interface %s (pending_action_tx=%p)", |
143 | MAC2STR(wpa_s->pending_action_dst), iface->ifname, | |
144 | wpa_s->pending_action_tx); | |
24f6497c JM |
145 | res = wpa_drv_send_action(iface, wpa_s->pending_action_freq, 0, |
146 | wpa_s->pending_action_dst, | |
147 | wpa_s->pending_action_src, | |
148 | wpa_s->pending_action_bssid, | |
149 | wpabuf_head(wpa_s->pending_action_tx), | |
b106173a JM |
150 | wpabuf_len(wpa_s->pending_action_tx), |
151 | wpa_s->pending_action_no_cck); | |
24f6497c JM |
152 | if (res) { |
153 | wpa_printf(MSG_DEBUG, "Off-channel: Failed to send the " | |
154 | "pending Action frame"); | |
155 | /* | |
156 | * Use fake TX status event to allow state machines to | |
157 | * continue. | |
158 | */ | |
159 | offchannel_send_action_tx_status( | |
160 | wpa_s, wpa_s->pending_action_dst, | |
161 | wpabuf_head(wpa_s->pending_action_tx), | |
162 | wpabuf_len(wpa_s->pending_action_tx), | |
163 | OFFCHANNEL_SEND_ACTION_FAILED); | |
164 | } | |
165 | } | |
166 | ||
167 | ||
b4419c62 JM |
168 | /** |
169 | * offchannel_send_action_tx_status - TX status callback | |
170 | * @wpa_s: Pointer to wpa_supplicant data | |
171 | * @dst: Destination MAC address of the transmitted Action frame | |
172 | * @data: Transmitted frame payload | |
173 | * @data_len: Length of @data in bytes | |
174 | * @result: TX status | |
175 | * | |
176 | * This function is called whenever the driver indicates a TX status event for | |
177 | * a frame sent by offchannel_send_action() using wpa_drv_send_action(). | |
178 | */ | |
24f6497c JM |
179 | void offchannel_send_action_tx_status( |
180 | struct wpa_supplicant *wpa_s, const u8 *dst, const u8 *data, | |
181 | size_t data_len, enum offchannel_send_action_result result) | |
182 | { | |
183 | if (wpa_s->pending_action_tx == NULL) { | |
184 | wpa_printf(MSG_DEBUG, "Off-channel: Ignore Action TX status - " | |
185 | "no pending operation"); | |
186 | return; | |
187 | } | |
188 | ||
189 | if (os_memcmp(dst, wpa_s->pending_action_dst, ETH_ALEN) != 0) { | |
190 | wpa_printf(MSG_DEBUG, "Off-channel: Ignore Action TX status - " | |
191 | "unknown destination address"); | |
192 | return; | |
193 | } | |
194 | ||
47d986e6 PLL |
195 | /* Accept report only if the contents of the frame matches */ |
196 | if (data_len - wpabuf_len(wpa_s->pending_action_tx) != 24 || | |
197 | os_memcmp(data + 24, wpabuf_head(wpa_s->pending_action_tx), | |
198 | wpabuf_len(wpa_s->pending_action_tx)) != 0) { | |
199 | wpa_printf(MSG_DEBUG, "Off-channel: Ignore Action TX status - " | |
200 | "mismatching contents with pending frame"); | |
201 | wpa_hexdump(MSG_MSGDUMP, "TX status frame data", | |
202 | data, data_len); | |
203 | wpa_hexdump_buf(MSG_MSGDUMP, "Pending TX frame", | |
204 | wpa_s->pending_action_tx); | |
205 | return; | |
206 | } | |
207 | ||
e699a7a9 JM |
208 | wpa_printf(MSG_DEBUG, |
209 | "Off-channel: Delete matching pending action frame (dst=" | |
210 | MACSTR " pending_action_tx=%p)", MAC2STR(dst), | |
211 | wpa_s->pending_action_tx); | |
212 | wpa_hexdump_buf(MSG_MSGDUMP, "Pending TX frame", | |
213 | wpa_s->pending_action_tx); | |
24f6497c JM |
214 | wpabuf_free(wpa_s->pending_action_tx); |
215 | wpa_s->pending_action_tx = NULL; | |
216 | ||
217 | wpa_printf(MSG_DEBUG, "Off-channel: TX status result=%d cb=%p", | |
218 | result, wpa_s->pending_action_tx_status_cb); | |
219 | ||
220 | if (wpa_s->pending_action_tx_status_cb) { | |
221 | wpa_s->pending_action_tx_status_cb( | |
222 | wpa_s, wpa_s->pending_action_freq, | |
223 | wpa_s->pending_action_dst, wpa_s->pending_action_src, | |
224 | wpa_s->pending_action_bssid, | |
225 | data, data_len, result); | |
226 | } | |
49e1e9ca JJ |
227 | |
228 | #ifdef CONFIG_P2P | |
b7bb2c02 | 229 | if (wpa_s->global->p2p_long_listen > 0) { |
49e1e9ca JJ |
230 | /* Continue the listen */ |
231 | wpa_printf(MSG_DEBUG, "P2P: Continuing long Listen state"); | |
b7bb2c02 | 232 | wpas_p2p_listen_start(wpa_s, wpa_s->global->p2p_long_listen); |
49e1e9ca JJ |
233 | } |
234 | #endif /* CONFIG_P2P */ | |
24f6497c JM |
235 | } |
236 | ||
237 | ||
b4419c62 JM |
238 | /** |
239 | * offchannel_send_action - Request off-channel Action frame TX | |
240 | * @wpa_s: Pointer to wpa_supplicant data | |
241 | * @freq: The frequency in MHz indicating the channel on which the frame is to | |
242 | * transmitted or 0 for the current channel (only if associated) | |
243 | * @dst: Action frame destination MAC address | |
244 | * @src: Action frame source MAC address | |
245 | * @bssid: Action frame BSSID | |
246 | * @buf: Frame to transmit starting from the Category field | |
247 | * @len: Length of @buf in bytes | |
248 | * @wait_time: Wait time for response in milliseconds | |
249 | * @tx_cb: Callback function for indicating TX status or %NULL for now callback | |
250 | * @no_cck: Whether CCK rates are to be disallowed for TX rate selection | |
251 | * Returns: 0 on success or -1 on failure | |
252 | * | |
253 | * This function is used to request an Action frame to be transmitted on the | |
254 | * current operating channel or on another channel (off-channel). The actual | |
255 | * frame transmission will be delayed until the driver is ready on the specified | |
256 | * channel. The @wait_time parameter can be used to request the driver to remain | |
257 | * awake on the channel to wait for a response. | |
258 | */ | |
24f6497c JM |
259 | int offchannel_send_action(struct wpa_supplicant *wpa_s, unsigned int freq, |
260 | const u8 *dst, const u8 *src, const u8 *bssid, | |
261 | const u8 *buf, size_t len, unsigned int wait_time, | |
262 | void (*tx_cb)(struct wpa_supplicant *wpa_s, | |
263 | unsigned int freq, const u8 *dst, | |
264 | const u8 *src, const u8 *bssid, | |
265 | const u8 *data, size_t data_len, | |
266 | enum offchannel_send_action_result | |
b106173a JM |
267 | result), |
268 | int no_cck) | |
24f6497c JM |
269 | { |
270 | wpa_printf(MSG_DEBUG, "Off-channel: Send action frame: freq=%d dst=" | |
271 | MACSTR " src=" MACSTR " bssid=" MACSTR " len=%d", | |
272 | freq, MAC2STR(dst), MAC2STR(src), MAC2STR(bssid), | |
273 | (int) len); | |
274 | ||
275 | wpa_s->pending_action_tx_status_cb = tx_cb; | |
276 | ||
277 | if (wpa_s->pending_action_tx) { | |
278 | wpa_printf(MSG_DEBUG, "Off-channel: Dropped pending Action " | |
e699a7a9 JM |
279 | "frame TX to " MACSTR " (pending_action_tx=%p)", |
280 | MAC2STR(wpa_s->pending_action_dst), | |
281 | wpa_s->pending_action_tx); | |
282 | wpa_hexdump_buf(MSG_MSGDUMP, "Pending TX frame", | |
283 | wpa_s->pending_action_tx); | |
24f6497c JM |
284 | wpabuf_free(wpa_s->pending_action_tx); |
285 | } | |
d4b951f3 | 286 | wpa_s->pending_action_tx_done = 0; |
24f6497c JM |
287 | wpa_s->pending_action_tx = wpabuf_alloc(len); |
288 | if (wpa_s->pending_action_tx == NULL) { | |
289 | wpa_printf(MSG_DEBUG, "Off-channel: Failed to allocate Action " | |
290 | "frame TX buffer (len=%llu)", | |
291 | (unsigned long long) len); | |
292 | return -1; | |
293 | } | |
294 | wpabuf_put_data(wpa_s->pending_action_tx, buf, len); | |
295 | os_memcpy(wpa_s->pending_action_src, src, ETH_ALEN); | |
296 | os_memcpy(wpa_s->pending_action_dst, dst, ETH_ALEN); | |
297 | os_memcpy(wpa_s->pending_action_bssid, bssid, ETH_ALEN); | |
298 | wpa_s->pending_action_freq = freq; | |
b106173a | 299 | wpa_s->pending_action_no_cck = no_cck; |
e699a7a9 JM |
300 | wpa_printf(MSG_DEBUG, |
301 | "Off-channel: Stored pending action frame (dst=" MACSTR | |
302 | " pending_action_tx=%p)", | |
303 | MAC2STR(dst), wpa_s->pending_action_tx); | |
304 | wpa_hexdump_buf(MSG_MSGDUMP, "Pending TX frame", | |
305 | wpa_s->pending_action_tx); | |
24f6497c JM |
306 | |
307 | if (freq != 0 && wpa_s->drv_flags & WPA_DRIVER_FLAGS_OFFCHANNEL_TX) { | |
308 | struct wpa_supplicant *iface; | |
d4b951f3 | 309 | int ret; |
24f6497c | 310 | |
8e3afd7f | 311 | iface = wpas_get_tx_interface(wpa_s, src); |
24f6497c | 312 | wpa_s->action_tx_wait_time = wait_time; |
d4d76d98 JM |
313 | if (wait_time) |
314 | wpa_s->action_tx_wait_time_used = 1; | |
24f6497c | 315 | |
d4b951f3 | 316 | ret = wpa_drv_send_action( |
b106173a JM |
317 | iface, wpa_s->pending_action_freq, |
318 | wait_time, wpa_s->pending_action_dst, | |
319 | wpa_s->pending_action_src, wpa_s->pending_action_bssid, | |
320 | wpabuf_head(wpa_s->pending_action_tx), | |
321 | wpabuf_len(wpa_s->pending_action_tx), | |
322 | wpa_s->pending_action_no_cck); | |
d4b951f3 JM |
323 | if (ret == 0) |
324 | wpa_s->pending_action_tx_done = 1; | |
325 | return ret; | |
24f6497c JM |
326 | } |
327 | ||
328 | if (freq) { | |
329 | struct wpa_supplicant *tx_iface; | |
330 | tx_iface = wpas_get_tx_interface(wpa_s, src); | |
331 | if (tx_iface->assoc_freq == freq) { | |
332 | wpa_printf(MSG_DEBUG, "Off-channel: Already on " | |
333 | "requested channel (TX interface operating " | |
334 | "channel)"); | |
335 | freq = 0; | |
336 | } | |
337 | } | |
338 | ||
339 | if (wpa_s->off_channel_freq == freq || freq == 0) { | |
340 | wpa_printf(MSG_DEBUG, "Off-channel: Already on requested " | |
341 | "channel; send Action frame immediately"); | |
342 | /* TODO: Would there ever be need to extend the current | |
343 | * duration on the channel? */ | |
344 | wpa_s->pending_action_without_roc = 1; | |
345 | eloop_cancel_timeout(wpas_send_action_cb, wpa_s, NULL); | |
346 | eloop_register_timeout(0, 0, wpas_send_action_cb, wpa_s, NULL); | |
347 | return 0; | |
348 | } | |
349 | wpa_s->pending_action_without_roc = 0; | |
350 | ||
351 | if (wpa_s->roc_waiting_drv_freq == freq) { | |
352 | wpa_printf(MSG_DEBUG, "Off-channel: Already waiting for " | |
353 | "driver to get to frequency %u MHz; continue " | |
354 | "waiting to send the Action frame", freq); | |
355 | return 0; | |
356 | } | |
357 | ||
358 | wpa_printf(MSG_DEBUG, "Off-channel: Schedule Action frame to be " | |
359 | "transmitted once the driver gets to the requested " | |
360 | "channel"); | |
361 | if (wait_time > wpa_s->max_remain_on_chan) | |
362 | wait_time = wpa_s->max_remain_on_chan; | |
a2ea8d64 WJL |
363 | else if (wait_time == 0) |
364 | wait_time = 20; | |
1f94e4ee JM |
365 | #ifdef CONFIG_TESTING_OPTIONS |
366 | if (wpa_s->extra_roc_dur) { | |
367 | wpa_printf(MSG_DEBUG, "TESTING: Increase ROC duration %u -> %u", | |
368 | wait_time, wait_time + wpa_s->extra_roc_dur); | |
369 | wait_time += wpa_s->extra_roc_dur; | |
370 | } | |
371 | #endif /* CONFIG_TESTING_OPTIONS */ | |
24f6497c JM |
372 | if (wpa_drv_remain_on_channel(wpa_s, freq, wait_time) < 0) { |
373 | wpa_printf(MSG_DEBUG, "Off-channel: Failed to request driver " | |
374 | "to remain on channel (%u MHz) for Action " | |
375 | "Frame TX", freq); | |
376 | return -1; | |
377 | } | |
378 | wpa_s->off_channel_freq = 0; | |
379 | wpa_s->roc_waiting_drv_freq = freq; | |
380 | ||
381 | return 0; | |
382 | } | |
383 | ||
384 | ||
b4419c62 JM |
385 | /** |
386 | * offchannel_send_send_action_done - Notify completion of Action frame sequence | |
387 | * @wpa_s: Pointer to wpa_supplicant data | |
388 | * | |
389 | * This function can be used to cancel a wait for additional response frames on | |
390 | * the channel that was used with offchannel_send_action(). | |
391 | */ | |
24f6497c JM |
392 | void offchannel_send_action_done(struct wpa_supplicant *wpa_s) |
393 | { | |
66eaf8a2 JM |
394 | wpa_printf(MSG_DEBUG, |
395 | "Off-channel: Action frame sequence done notification: pending_action_tx=%p drv_offchan_tx=%d action_tx_wait_time=%d off_channel_freq=%d roc_waiting_drv_freq=%d", | |
396 | wpa_s->pending_action_tx, | |
397 | !!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_OFFCHANNEL_TX), | |
398 | wpa_s->action_tx_wait_time, wpa_s->off_channel_freq, | |
399 | wpa_s->roc_waiting_drv_freq); | |
24f6497c JM |
400 | wpabuf_free(wpa_s->pending_action_tx); |
401 | wpa_s->pending_action_tx = NULL; | |
402 | if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_OFFCHANNEL_TX && | |
d4d76d98 | 403 | (wpa_s->action_tx_wait_time || wpa_s->action_tx_wait_time_used)) |
24f6497c | 404 | wpa_drv_send_action_cancel_wait(wpa_s); |
66eaf8a2 | 405 | else if (wpa_s->off_channel_freq || wpa_s->roc_waiting_drv_freq) { |
24f6497c JM |
406 | wpa_drv_cancel_remain_on_channel(wpa_s); |
407 | wpa_s->off_channel_freq = 0; | |
408 | wpa_s->roc_waiting_drv_freq = 0; | |
409 | } | |
d4d76d98 | 410 | wpa_s->action_tx_wait_time_used = 0; |
24f6497c JM |
411 | } |
412 | ||
413 | ||
b4419c62 JM |
414 | /** |
415 | * offchannel_remain_on_channel_cb - Remain-on-channel callback function | |
416 | * @wpa_s: Pointer to wpa_supplicant data | |
417 | * @freq: Frequency (in MHz) of the selected channel | |
418 | * @duration: Duration of the remain-on-channel operation in milliseconds | |
419 | * | |
420 | * This function is called whenever the driver notifies beginning of a | |
421 | * remain-on-channel operation. | |
422 | */ | |
24f6497c JM |
423 | void offchannel_remain_on_channel_cb(struct wpa_supplicant *wpa_s, |
424 | unsigned int freq, unsigned int duration) | |
425 | { | |
426 | wpa_s->roc_waiting_drv_freq = 0; | |
427 | wpa_s->off_channel_freq = freq; | |
428 | wpas_send_action_cb(wpa_s, NULL); | |
429 | } | |
430 | ||
431 | ||
b4419c62 JM |
432 | /** |
433 | * offchannel_cancel_remain_on_channel_cb - Remain-on-channel stopped callback | |
434 | * @wpa_s: Pointer to wpa_supplicant data | |
435 | * @freq: Frequency (in MHz) of the selected channel | |
436 | * | |
437 | * This function is called whenever the driver notifies termination of a | |
438 | * remain-on-channel operation. | |
439 | */ | |
24f6497c JM |
440 | void offchannel_cancel_remain_on_channel_cb(struct wpa_supplicant *wpa_s, |
441 | unsigned int freq) | |
442 | { | |
443 | wpa_s->off_channel_freq = 0; | |
444 | } | |
445 | ||
446 | ||
2f3101d8 JM |
447 | /** |
448 | * offchannel_pending_action_tx - Check whether there is a pending Action TX | |
449 | * @wpa_s: Pointer to wpa_supplicant data | |
450 | * Returns: Pointer to pending frame or %NULL if no pending operation | |
451 | * | |
452 | * This function can be used to check whether there is a pending Action frame TX | |
453 | * operation. The returned pointer should be used only for checking whether it | |
454 | * is %NULL (no pending frame) or to print the pointer value in debug | |
455 | * information (i.e., the pointer should not be dereferenced). | |
456 | */ | |
457 | const void * offchannel_pending_action_tx(struct wpa_supplicant *wpa_s) | |
458 | { | |
459 | return wpa_s->pending_action_tx; | |
460 | } | |
461 | ||
462 | ||
463 | /** | |
464 | * offchannel_clear_pending_action_tx - Clear pending Action frame TX | |
465 | * @wpa_s: Pointer to wpa_supplicant data | |
466 | */ | |
467 | void offchannel_clear_pending_action_tx(struct wpa_supplicant *wpa_s) | |
468 | { | |
e699a7a9 JM |
469 | wpa_printf(MSG_DEBUG, |
470 | "Off-channel: Clear pending Action frame TX (pending_action_tx=%p", | |
471 | wpa_s->pending_action_tx); | |
2f3101d8 JM |
472 | wpabuf_free(wpa_s->pending_action_tx); |
473 | wpa_s->pending_action_tx = NULL; | |
474 | } | |
475 | ||
476 | ||
b4419c62 JM |
477 | /** |
478 | * offchannel_deinit - Deinit off-channel operations | |
479 | * @wpa_s: Pointer to wpa_supplicant data | |
480 | * | |
481 | * This function is used to free up any allocated resources for off-channel | |
482 | * operations. | |
483 | */ | |
24f6497c JM |
484 | void offchannel_deinit(struct wpa_supplicant *wpa_s) |
485 | { | |
2f3101d8 | 486 | offchannel_clear_pending_action_tx(wpa_s); |
24f6497c JM |
487 | eloop_cancel_timeout(wpas_send_action_cb, wpa_s, NULL); |
488 | } |