Commit | Line | Data |
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ff1d2767 JM |
1 | /* Host AP driver Info Frame processing (part of hostap.o module) */ |
2 | ||
5fad5a2e AB |
3 | #include "hostap_wlan.h" |
4 | #include "hostap.h" | |
5 | #include "hostap_ap.h" | |
ff1d2767 JM |
6 | |
7 | /* Called only as a tasklet (software IRQ) */ | |
8 | static void prism2_info_commtallies16(local_info_t *local, unsigned char *buf, | |
9 | int left) | |
10 | { | |
11 | struct hfa384x_comm_tallies *tallies; | |
12 | ||
13 | if (left < sizeof(struct hfa384x_comm_tallies)) { | |
14 | printk(KERN_DEBUG "%s: too short (len=%d) commtallies " | |
15 | "info frame\n", local->dev->name, left); | |
16 | return; | |
17 | } | |
18 | ||
19 | tallies = (struct hfa384x_comm_tallies *) buf; | |
20 | #define ADD_COMM_TALLIES(name) \ | |
21 | local->comm_tallies.name += le16_to_cpu(tallies->name) | |
22 | ADD_COMM_TALLIES(tx_unicast_frames); | |
23 | ADD_COMM_TALLIES(tx_multicast_frames); | |
24 | ADD_COMM_TALLIES(tx_fragments); | |
25 | ADD_COMM_TALLIES(tx_unicast_octets); | |
26 | ADD_COMM_TALLIES(tx_multicast_octets); | |
27 | ADD_COMM_TALLIES(tx_deferred_transmissions); | |
28 | ADD_COMM_TALLIES(tx_single_retry_frames); | |
29 | ADD_COMM_TALLIES(tx_multiple_retry_frames); | |
30 | ADD_COMM_TALLIES(tx_retry_limit_exceeded); | |
31 | ADD_COMM_TALLIES(tx_discards); | |
32 | ADD_COMM_TALLIES(rx_unicast_frames); | |
33 | ADD_COMM_TALLIES(rx_multicast_frames); | |
34 | ADD_COMM_TALLIES(rx_fragments); | |
35 | ADD_COMM_TALLIES(rx_unicast_octets); | |
36 | ADD_COMM_TALLIES(rx_multicast_octets); | |
37 | ADD_COMM_TALLIES(rx_fcs_errors); | |
38 | ADD_COMM_TALLIES(rx_discards_no_buffer); | |
39 | ADD_COMM_TALLIES(tx_discards_wrong_sa); | |
40 | ADD_COMM_TALLIES(rx_discards_wep_undecryptable); | |
41 | ADD_COMM_TALLIES(rx_message_in_msg_fragments); | |
42 | ADD_COMM_TALLIES(rx_message_in_bad_msg_fragments); | |
43 | #undef ADD_COMM_TALLIES | |
44 | } | |
45 | ||
46 | ||
47 | /* Called only as a tasklet (software IRQ) */ | |
48 | static void prism2_info_commtallies32(local_info_t *local, unsigned char *buf, | |
49 | int left) | |
50 | { | |
51 | struct hfa384x_comm_tallies32 *tallies; | |
52 | ||
53 | if (left < sizeof(struct hfa384x_comm_tallies32)) { | |
54 | printk(KERN_DEBUG "%s: too short (len=%d) commtallies32 " | |
55 | "info frame\n", local->dev->name, left); | |
56 | return; | |
57 | } | |
58 | ||
59 | tallies = (struct hfa384x_comm_tallies32 *) buf; | |
60 | #define ADD_COMM_TALLIES(name) \ | |
61 | local->comm_tallies.name += le32_to_cpu(tallies->name) | |
62 | ADD_COMM_TALLIES(tx_unicast_frames); | |
63 | ADD_COMM_TALLIES(tx_multicast_frames); | |
64 | ADD_COMM_TALLIES(tx_fragments); | |
65 | ADD_COMM_TALLIES(tx_unicast_octets); | |
66 | ADD_COMM_TALLIES(tx_multicast_octets); | |
67 | ADD_COMM_TALLIES(tx_deferred_transmissions); | |
68 | ADD_COMM_TALLIES(tx_single_retry_frames); | |
69 | ADD_COMM_TALLIES(tx_multiple_retry_frames); | |
70 | ADD_COMM_TALLIES(tx_retry_limit_exceeded); | |
71 | ADD_COMM_TALLIES(tx_discards); | |
72 | ADD_COMM_TALLIES(rx_unicast_frames); | |
73 | ADD_COMM_TALLIES(rx_multicast_frames); | |
74 | ADD_COMM_TALLIES(rx_fragments); | |
75 | ADD_COMM_TALLIES(rx_unicast_octets); | |
76 | ADD_COMM_TALLIES(rx_multicast_octets); | |
77 | ADD_COMM_TALLIES(rx_fcs_errors); | |
78 | ADD_COMM_TALLIES(rx_discards_no_buffer); | |
79 | ADD_COMM_TALLIES(tx_discards_wrong_sa); | |
80 | ADD_COMM_TALLIES(rx_discards_wep_undecryptable); | |
81 | ADD_COMM_TALLIES(rx_message_in_msg_fragments); | |
82 | ADD_COMM_TALLIES(rx_message_in_bad_msg_fragments); | |
83 | #undef ADD_COMM_TALLIES | |
84 | } | |
85 | ||
86 | ||
87 | /* Called only as a tasklet (software IRQ) */ | |
88 | static void prism2_info_commtallies(local_info_t *local, unsigned char *buf, | |
89 | int left) | |
90 | { | |
91 | if (local->tallies32) | |
92 | prism2_info_commtallies32(local, buf, left); | |
93 | else | |
94 | prism2_info_commtallies16(local, buf, left); | |
95 | } | |
96 | ||
97 | ||
98 | #ifndef PRISM2_NO_STATION_MODES | |
99 | #ifndef PRISM2_NO_DEBUG | |
100 | static const char* hfa384x_linkstatus_str(u16 linkstatus) | |
101 | { | |
102 | switch (linkstatus) { | |
103 | case HFA384X_LINKSTATUS_CONNECTED: | |
104 | return "Connected"; | |
105 | case HFA384X_LINKSTATUS_DISCONNECTED: | |
106 | return "Disconnected"; | |
107 | case HFA384X_LINKSTATUS_AP_CHANGE: | |
108 | return "Access point change"; | |
109 | case HFA384X_LINKSTATUS_AP_OUT_OF_RANGE: | |
110 | return "Access point out of range"; | |
111 | case HFA384X_LINKSTATUS_AP_IN_RANGE: | |
112 | return "Access point in range"; | |
113 | case HFA384X_LINKSTATUS_ASSOC_FAILED: | |
114 | return "Association failed"; | |
115 | default: | |
116 | return "Unknown"; | |
117 | } | |
118 | } | |
119 | #endif /* PRISM2_NO_DEBUG */ | |
120 | ||
121 | ||
122 | /* Called only as a tasklet (software IRQ) */ | |
123 | static void prism2_info_linkstatus(local_info_t *local, unsigned char *buf, | |
124 | int left) | |
125 | { | |
126 | u16 val; | |
127 | int non_sta_mode; | |
128 | ||
129 | /* Alloc new JoinRequests to occur since LinkStatus for the previous | |
130 | * has been received */ | |
131 | local->last_join_time = 0; | |
132 | ||
133 | if (left != 2) { | |
134 | printk(KERN_DEBUG "%s: invalid linkstatus info frame " | |
135 | "length %d\n", local->dev->name, left); | |
136 | return; | |
137 | } | |
138 | ||
139 | non_sta_mode = local->iw_mode == IW_MODE_MASTER || | |
140 | local->iw_mode == IW_MODE_REPEAT || | |
141 | local->iw_mode == IW_MODE_MONITOR; | |
142 | ||
143 | val = buf[0] | (buf[1] << 8); | |
144 | if (!non_sta_mode || val != HFA384X_LINKSTATUS_DISCONNECTED) { | |
145 | PDEBUG(DEBUG_EXTRA, "%s: LinkStatus=%d (%s)\n", | |
146 | local->dev->name, val, hfa384x_linkstatus_str(val)); | |
147 | } | |
148 | ||
149 | if (non_sta_mode) { | |
150 | netif_carrier_on(local->dev); | |
151 | netif_carrier_on(local->ddev); | |
152 | return; | |
153 | } | |
154 | ||
155 | /* Get current BSSID later in scheduled task */ | |
156 | set_bit(PRISM2_INFO_PENDING_LINKSTATUS, &local->pending_info); | |
157 | local->prev_link_status = val; | |
158 | schedule_work(&local->info_queue); | |
159 | } | |
160 | ||
161 | ||
162 | static void prism2_host_roaming(local_info_t *local) | |
163 | { | |
164 | struct hfa384x_join_request req; | |
165 | struct net_device *dev = local->dev; | |
2e4fd068 | 166 | struct hfa384x_hostscan_result *selected, *entry; |
ff1d2767 JM |
167 | int i; |
168 | unsigned long flags; | |
0795af57 | 169 | DECLARE_MAC_BUF(mac); |
ff1d2767 JM |
170 | |
171 | if (local->last_join_time && | |
172 | time_before(jiffies, local->last_join_time + 10 * HZ)) { | |
173 | PDEBUG(DEBUG_EXTRA, "%s: last join request has not yet been " | |
174 | "completed - waiting for it before issuing new one\n", | |
175 | dev->name); | |
176 | return; | |
177 | } | |
178 | ||
179 | /* ScanResults are sorted: first ESS results in decreasing signal | |
180 | * quality then IBSS results in similar order. | |
181 | * Trivial roaming policy: just select the first entry. | |
182 | * This could probably be improved by adding hysteresis to limit | |
183 | * number of handoffs, etc. | |
184 | * | |
185 | * Could do periodic RID_SCANREQUEST or Inquire F101 to get new | |
186 | * ScanResults */ | |
187 | spin_lock_irqsave(&local->lock, flags); | |
188 | if (local->last_scan_results == NULL || | |
189 | local->last_scan_results_count == 0) { | |
190 | spin_unlock_irqrestore(&local->lock, flags); | |
191 | PDEBUG(DEBUG_EXTRA, "%s: no scan results for host roaming\n", | |
192 | dev->name); | |
193 | return; | |
194 | } | |
195 | ||
196 | selected = &local->last_scan_results[0]; | |
197 | ||
198 | if (local->preferred_ap[0] || local->preferred_ap[1] || | |
199 | local->preferred_ap[2] || local->preferred_ap[3] || | |
200 | local->preferred_ap[4] || local->preferred_ap[5]) { | |
201 | /* Try to find preferred AP */ | |
0795af57 JP |
202 | PDEBUG(DEBUG_EXTRA, "%s: Preferred AP BSSID " |
203 | "%s\n", | |
204 | dev->name, print_mac(mac, local->preferred_ap)); | |
ff1d2767 JM |
205 | for (i = 0; i < local->last_scan_results_count; i++) { |
206 | entry = &local->last_scan_results[i]; | |
207 | if (memcmp(local->preferred_ap, entry->bssid, 6) == 0) | |
208 | { | |
209 | PDEBUG(DEBUG_EXTRA, "%s: using preferred AP " | |
210 | "selection\n", dev->name); | |
211 | selected = entry; | |
212 | break; | |
213 | } | |
214 | } | |
215 | } | |
216 | ||
217 | memcpy(req.bssid, selected->bssid, 6); | |
218 | req.channel = selected->chid; | |
219 | spin_unlock_irqrestore(&local->lock, flags); | |
220 | ||
0795af57 JP |
221 | PDEBUG(DEBUG_EXTRA, "%s: JoinRequest: BSSID=%s" |
222 | " channel=%d\n", | |
223 | dev->name, print_mac(mac, req.bssid), le16_to_cpu(req.channel)); | |
ff1d2767 JM |
224 | if (local->func->set_rid(dev, HFA384X_RID_JOINREQUEST, &req, |
225 | sizeof(req))) { | |
226 | printk(KERN_DEBUG "%s: JoinRequest failed\n", dev->name); | |
227 | } | |
228 | local->last_join_time = jiffies; | |
229 | } | |
230 | ||
231 | ||
232 | static void hostap_report_scan_complete(local_info_t *local) | |
233 | { | |
234 | union iwreq_data wrqu; | |
235 | ||
236 | /* Inform user space about new scan results (just empty event, | |
237 | * SIOCGIWSCAN can be used to fetch data */ | |
238 | wrqu.data.length = 0; | |
239 | wrqu.data.flags = 0; | |
240 | wireless_send_event(local->dev, SIOCGIWSCAN, &wrqu, NULL); | |
241 | ||
242 | /* Allow SIOCGIWSCAN handling to occur since we have received | |
243 | * scanning result */ | |
244 | local->scan_timestamp = 0; | |
245 | } | |
246 | ||
247 | ||
248 | /* Called only as a tasklet (software IRQ) */ | |
249 | static void prism2_info_scanresults(local_info_t *local, unsigned char *buf, | |
250 | int left) | |
251 | { | |
252 | u16 *pos; | |
2e4fd068 | 253 | int new_count, i; |
ff1d2767 | 254 | unsigned long flags; |
2e4fd068 JM |
255 | struct hfa384x_scan_result *res; |
256 | struct hfa384x_hostscan_result *results, *prev; | |
ff1d2767 JM |
257 | |
258 | if (left < 4) { | |
259 | printk(KERN_DEBUG "%s: invalid scanresult info frame " | |
260 | "length %d\n", local->dev->name, left); | |
261 | return; | |
262 | } | |
263 | ||
264 | pos = (u16 *) buf; | |
265 | pos++; | |
266 | pos++; | |
267 | left -= 4; | |
268 | ||
269 | new_count = left / sizeof(struct hfa384x_scan_result); | |
2e4fd068 | 270 | results = kmalloc(new_count * sizeof(struct hfa384x_hostscan_result), |
ff1d2767 JM |
271 | GFP_ATOMIC); |
272 | if (results == NULL) | |
273 | return; | |
2e4fd068 JM |
274 | |
275 | /* Convert to hostscan result format. */ | |
276 | res = (struct hfa384x_scan_result *) pos; | |
277 | for (i = 0; i < new_count; i++) { | |
278 | memcpy(&results[i], &res[i], | |
279 | sizeof(struct hfa384x_scan_result)); | |
280 | results[i].atim = 0; | |
281 | } | |
ff1d2767 JM |
282 | |
283 | spin_lock_irqsave(&local->lock, flags); | |
284 | local->last_scan_type = PRISM2_SCAN; | |
285 | prev = local->last_scan_results; | |
286 | local->last_scan_results = results; | |
287 | local->last_scan_results_count = new_count; | |
288 | spin_unlock_irqrestore(&local->lock, flags); | |
289 | kfree(prev); | |
290 | ||
291 | hostap_report_scan_complete(local); | |
292 | ||
293 | /* Perform rest of ScanResults handling later in scheduled task */ | |
294 | set_bit(PRISM2_INFO_PENDING_SCANRESULTS, &local->pending_info); | |
295 | schedule_work(&local->info_queue); | |
296 | } | |
297 | ||
298 | ||
299 | /* Called only as a tasklet (software IRQ) */ | |
300 | static void prism2_info_hostscanresults(local_info_t *local, | |
301 | unsigned char *buf, int left) | |
302 | { | |
303 | int i, result_size, copy_len, new_count; | |
304 | struct hfa384x_hostscan_result *results, *prev; | |
305 | unsigned long flags; | |
306 | u16 *pos; | |
307 | u8 *ptr; | |
308 | ||
309 | wake_up_interruptible(&local->hostscan_wq); | |
310 | ||
311 | if (left < 4) { | |
312 | printk(KERN_DEBUG "%s: invalid hostscanresult info frame " | |
313 | "length %d\n", local->dev->name, left); | |
314 | return; | |
315 | } | |
316 | ||
317 | pos = (u16 *) buf; | |
318 | copy_len = result_size = le16_to_cpu(*pos); | |
319 | if (result_size == 0) { | |
320 | printk(KERN_DEBUG "%s: invalid result_size (0) in " | |
321 | "hostscanresults\n", local->dev->name); | |
322 | return; | |
323 | } | |
324 | if (copy_len > sizeof(struct hfa384x_hostscan_result)) | |
325 | copy_len = sizeof(struct hfa384x_hostscan_result); | |
326 | ||
327 | pos++; | |
328 | pos++; | |
329 | left -= 4; | |
330 | ptr = (u8 *) pos; | |
331 | ||
332 | new_count = left / result_size; | |
b0471bb7 | 333 | results = kcalloc(new_count, sizeof(struct hfa384x_hostscan_result), |
ff1d2767 JM |
334 | GFP_ATOMIC); |
335 | if (results == NULL) | |
336 | return; | |
ff1d2767 JM |
337 | |
338 | for (i = 0; i < new_count; i++) { | |
339 | memcpy(&results[i], ptr, copy_len); | |
340 | ptr += result_size; | |
341 | left -= result_size; | |
342 | } | |
343 | ||
344 | if (left) { | |
345 | printk(KERN_DEBUG "%s: short HostScan result entry (%d/%d)\n", | |
346 | local->dev->name, left, result_size); | |
347 | } | |
348 | ||
349 | spin_lock_irqsave(&local->lock, flags); | |
350 | local->last_scan_type = PRISM2_HOSTSCAN; | |
2e4fd068 JM |
351 | prev = local->last_scan_results; |
352 | local->last_scan_results = results; | |
353 | local->last_scan_results_count = new_count; | |
ff1d2767 JM |
354 | spin_unlock_irqrestore(&local->lock, flags); |
355 | kfree(prev); | |
356 | ||
357 | hostap_report_scan_complete(local); | |
358 | } | |
359 | #endif /* PRISM2_NO_STATION_MODES */ | |
360 | ||
361 | ||
362 | /* Called only as a tasklet (software IRQ) */ | |
363 | void hostap_info_process(local_info_t *local, struct sk_buff *skb) | |
364 | { | |
365 | struct hfa384x_info_frame *info; | |
366 | unsigned char *buf; | |
367 | int left; | |
368 | #ifndef PRISM2_NO_DEBUG | |
369 | int i; | |
370 | #endif /* PRISM2_NO_DEBUG */ | |
371 | ||
372 | info = (struct hfa384x_info_frame *) skb->data; | |
373 | buf = skb->data + sizeof(*info); | |
374 | left = skb->len - sizeof(*info); | |
375 | ||
376 | switch (info->type) { | |
377 | case HFA384X_INFO_COMMTALLIES: | |
378 | prism2_info_commtallies(local, buf, left); | |
379 | break; | |
380 | ||
381 | #ifndef PRISM2_NO_STATION_MODES | |
382 | case HFA384X_INFO_LINKSTATUS: | |
383 | prism2_info_linkstatus(local, buf, left); | |
384 | break; | |
385 | ||
386 | case HFA384X_INFO_SCANRESULTS: | |
387 | prism2_info_scanresults(local, buf, left); | |
388 | break; | |
389 | ||
390 | case HFA384X_INFO_HOSTSCANRESULTS: | |
391 | prism2_info_hostscanresults(local, buf, left); | |
392 | break; | |
393 | #endif /* PRISM2_NO_STATION_MODES */ | |
394 | ||
395 | #ifndef PRISM2_NO_DEBUG | |
396 | default: | |
397 | PDEBUG(DEBUG_EXTRA, "%s: INFO - len=%d type=0x%04x\n", | |
398 | local->dev->name, info->len, info->type); | |
399 | PDEBUG(DEBUG_EXTRA, "Unknown info frame:"); | |
400 | for (i = 0; i < (left < 100 ? left : 100); i++) | |
401 | PDEBUG2(DEBUG_EXTRA, " %02x", buf[i]); | |
402 | PDEBUG2(DEBUG_EXTRA, "\n"); | |
403 | break; | |
404 | #endif /* PRISM2_NO_DEBUG */ | |
405 | } | |
406 | } | |
407 | ||
408 | ||
409 | #ifndef PRISM2_NO_STATION_MODES | |
410 | static void handle_info_queue_linkstatus(local_info_t *local) | |
411 | { | |
412 | int val = local->prev_link_status; | |
413 | int connected; | |
414 | union iwreq_data wrqu; | |
0795af57 | 415 | DECLARE_MAC_BUF(mac); |
ff1d2767 JM |
416 | |
417 | connected = | |
418 | val == HFA384X_LINKSTATUS_CONNECTED || | |
419 | val == HFA384X_LINKSTATUS_AP_CHANGE || | |
420 | val == HFA384X_LINKSTATUS_AP_IN_RANGE; | |
421 | ||
422 | if (local->func->get_rid(local->dev, HFA384X_RID_CURRENTBSSID, | |
423 | local->bssid, ETH_ALEN, 1) < 0) { | |
424 | printk(KERN_DEBUG "%s: could not read CURRENTBSSID after " | |
425 | "LinkStatus event\n", local->dev->name); | |
426 | } else { | |
0795af57 JP |
427 | PDEBUG(DEBUG_EXTRA, "%s: LinkStatus: BSSID=" |
428 | "%s\n", | |
ff1d2767 | 429 | local->dev->name, |
0795af57 | 430 | print_mac(mac, (unsigned char *) local->bssid)); |
ff1d2767 JM |
431 | if (local->wds_type & HOSTAP_WDS_AP_CLIENT) |
432 | hostap_add_sta(local->ap, local->bssid); | |
433 | } | |
434 | ||
435 | /* Get BSSID if we have a valid AP address */ | |
436 | if (connected) { | |
437 | netif_carrier_on(local->dev); | |
438 | netif_carrier_on(local->ddev); | |
439 | memcpy(wrqu.ap_addr.sa_data, local->bssid, ETH_ALEN); | |
440 | } else { | |
441 | netif_carrier_off(local->dev); | |
442 | netif_carrier_off(local->ddev); | |
443 | memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN); | |
444 | } | |
445 | wrqu.ap_addr.sa_family = ARPHRD_ETHER; | |
446 | ||
447 | /* | |
448 | * Filter out sequential disconnect events in order not to cause a | |
449 | * flood of SIOCGIWAP events that have a race condition with EAPOL | |
450 | * frames and can confuse wpa_supplicant about the current association | |
451 | * status. | |
452 | */ | |
453 | if (connected || local->prev_linkstatus_connected) | |
454 | wireless_send_event(local->dev, SIOCGIWAP, &wrqu, NULL); | |
455 | local->prev_linkstatus_connected = connected; | |
456 | } | |
457 | ||
458 | ||
459 | static void handle_info_queue_scanresults(local_info_t *local) | |
460 | { | |
461 | if (local->host_roaming == 1 && local->iw_mode == IW_MODE_INFRA) | |
462 | prism2_host_roaming(local); | |
0c629a69 JM |
463 | |
464 | if (local->host_roaming == 2 && local->iw_mode == IW_MODE_INFRA && | |
465 | memcmp(local->preferred_ap, "\x00\x00\x00\x00\x00\x00", | |
466 | ETH_ALEN) != 0) { | |
467 | /* | |
468 | * Firmware seems to be getting into odd state in host_roaming | |
469 | * mode 2 when hostscan is used without join command, so try | |
470 | * to fix this by re-joining the current AP. This does not | |
471 | * actually trigger a new association if the current AP is | |
472 | * still in the scan results. | |
473 | */ | |
474 | prism2_host_roaming(local); | |
475 | } | |
ff1d2767 JM |
476 | } |
477 | ||
478 | ||
479 | /* Called only as scheduled task after receiving info frames (used to avoid | |
480 | * pending too much time in HW IRQ handler). */ | |
c4028958 | 481 | static void handle_info_queue(struct work_struct *work) |
ff1d2767 | 482 | { |
c4028958 | 483 | local_info_t *local = container_of(work, local_info_t, info_queue); |
ff1d2767 JM |
484 | |
485 | if (test_and_clear_bit(PRISM2_INFO_PENDING_LINKSTATUS, | |
486 | &local->pending_info)) | |
487 | handle_info_queue_linkstatus(local); | |
488 | ||
489 | if (test_and_clear_bit(PRISM2_INFO_PENDING_SCANRESULTS, | |
490 | &local->pending_info)) | |
491 | handle_info_queue_scanresults(local); | |
492 | } | |
493 | #endif /* PRISM2_NO_STATION_MODES */ | |
494 | ||
495 | ||
496 | void hostap_info_init(local_info_t *local) | |
497 | { | |
498 | skb_queue_head_init(&local->info_list); | |
499 | #ifndef PRISM2_NO_STATION_MODES | |
c4028958 | 500 | INIT_WORK(&local->info_queue, handle_info_queue); |
ff1d2767 JM |
501 | #endif /* PRISM2_NO_STATION_MODES */ |
502 | } | |
503 | ||
504 | ||
505 | EXPORT_SYMBOL(hostap_info_init); | |
506 | EXPORT_SYMBOL(hostap_info_process); |