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; | |
169 | ||
170 | if (local->last_join_time && | |
171 | time_before(jiffies, local->last_join_time + 10 * HZ)) { | |
172 | PDEBUG(DEBUG_EXTRA, "%s: last join request has not yet been " | |
173 | "completed - waiting for it before issuing new one\n", | |
174 | dev->name); | |
175 | return; | |
176 | } | |
177 | ||
178 | /* ScanResults are sorted: first ESS results in decreasing signal | |
179 | * quality then IBSS results in similar order. | |
180 | * Trivial roaming policy: just select the first entry. | |
181 | * This could probably be improved by adding hysteresis to limit | |
182 | * number of handoffs, etc. | |
183 | * | |
184 | * Could do periodic RID_SCANREQUEST or Inquire F101 to get new | |
185 | * ScanResults */ | |
186 | spin_lock_irqsave(&local->lock, flags); | |
187 | if (local->last_scan_results == NULL || | |
188 | local->last_scan_results_count == 0) { | |
189 | spin_unlock_irqrestore(&local->lock, flags); | |
190 | PDEBUG(DEBUG_EXTRA, "%s: no scan results for host roaming\n", | |
191 | dev->name); | |
192 | return; | |
193 | } | |
194 | ||
195 | selected = &local->last_scan_results[0]; | |
196 | ||
197 | if (local->preferred_ap[0] || local->preferred_ap[1] || | |
198 | local->preferred_ap[2] || local->preferred_ap[3] || | |
199 | local->preferred_ap[4] || local->preferred_ap[5]) { | |
200 | /* Try to find preferred AP */ | |
201 | PDEBUG(DEBUG_EXTRA, "%s: Preferred AP BSSID " MACSTR "\n", | |
202 | dev->name, MAC2STR(local->preferred_ap)); | |
203 | for (i = 0; i < local->last_scan_results_count; i++) { | |
204 | entry = &local->last_scan_results[i]; | |
205 | if (memcmp(local->preferred_ap, entry->bssid, 6) == 0) | |
206 | { | |
207 | PDEBUG(DEBUG_EXTRA, "%s: using preferred AP " | |
208 | "selection\n", dev->name); | |
209 | selected = entry; | |
210 | break; | |
211 | } | |
212 | } | |
213 | } | |
214 | ||
215 | memcpy(req.bssid, selected->bssid, 6); | |
216 | req.channel = selected->chid; | |
217 | spin_unlock_irqrestore(&local->lock, flags); | |
218 | ||
219 | PDEBUG(DEBUG_EXTRA, "%s: JoinRequest: BSSID=" MACSTR " channel=%d\n", | |
220 | dev->name, MAC2STR(req.bssid), le16_to_cpu(req.channel)); | |
221 | if (local->func->set_rid(dev, HFA384X_RID_JOINREQUEST, &req, | |
222 | sizeof(req))) { | |
223 | printk(KERN_DEBUG "%s: JoinRequest failed\n", dev->name); | |
224 | } | |
225 | local->last_join_time = jiffies; | |
226 | } | |
227 | ||
228 | ||
229 | static void hostap_report_scan_complete(local_info_t *local) | |
230 | { | |
231 | union iwreq_data wrqu; | |
232 | ||
233 | /* Inform user space about new scan results (just empty event, | |
234 | * SIOCGIWSCAN can be used to fetch data */ | |
235 | wrqu.data.length = 0; | |
236 | wrqu.data.flags = 0; | |
237 | wireless_send_event(local->dev, SIOCGIWSCAN, &wrqu, NULL); | |
238 | ||
239 | /* Allow SIOCGIWSCAN handling to occur since we have received | |
240 | * scanning result */ | |
241 | local->scan_timestamp = 0; | |
242 | } | |
243 | ||
244 | ||
245 | /* Called only as a tasklet (software IRQ) */ | |
246 | static void prism2_info_scanresults(local_info_t *local, unsigned char *buf, | |
247 | int left) | |
248 | { | |
249 | u16 *pos; | |
2e4fd068 | 250 | int new_count, i; |
ff1d2767 | 251 | unsigned long flags; |
2e4fd068 JM |
252 | struct hfa384x_scan_result *res; |
253 | struct hfa384x_hostscan_result *results, *prev; | |
ff1d2767 JM |
254 | |
255 | if (left < 4) { | |
256 | printk(KERN_DEBUG "%s: invalid scanresult info frame " | |
257 | "length %d\n", local->dev->name, left); | |
258 | return; | |
259 | } | |
260 | ||
261 | pos = (u16 *) buf; | |
262 | pos++; | |
263 | pos++; | |
264 | left -= 4; | |
265 | ||
266 | new_count = left / sizeof(struct hfa384x_scan_result); | |
2e4fd068 | 267 | results = kmalloc(new_count * sizeof(struct hfa384x_hostscan_result), |
ff1d2767 JM |
268 | GFP_ATOMIC); |
269 | if (results == NULL) | |
270 | return; | |
2e4fd068 JM |
271 | |
272 | /* Convert to hostscan result format. */ | |
273 | res = (struct hfa384x_scan_result *) pos; | |
274 | for (i = 0; i < new_count; i++) { | |
275 | memcpy(&results[i], &res[i], | |
276 | sizeof(struct hfa384x_scan_result)); | |
277 | results[i].atim = 0; | |
278 | } | |
ff1d2767 JM |
279 | |
280 | spin_lock_irqsave(&local->lock, flags); | |
281 | local->last_scan_type = PRISM2_SCAN; | |
282 | prev = local->last_scan_results; | |
283 | local->last_scan_results = results; | |
284 | local->last_scan_results_count = new_count; | |
285 | spin_unlock_irqrestore(&local->lock, flags); | |
286 | kfree(prev); | |
287 | ||
288 | hostap_report_scan_complete(local); | |
289 | ||
290 | /* Perform rest of ScanResults handling later in scheduled task */ | |
291 | set_bit(PRISM2_INFO_PENDING_SCANRESULTS, &local->pending_info); | |
292 | schedule_work(&local->info_queue); | |
293 | } | |
294 | ||
295 | ||
296 | /* Called only as a tasklet (software IRQ) */ | |
297 | static void prism2_info_hostscanresults(local_info_t *local, | |
298 | unsigned char *buf, int left) | |
299 | { | |
300 | int i, result_size, copy_len, new_count; | |
301 | struct hfa384x_hostscan_result *results, *prev; | |
302 | unsigned long flags; | |
303 | u16 *pos; | |
304 | u8 *ptr; | |
305 | ||
306 | wake_up_interruptible(&local->hostscan_wq); | |
307 | ||
308 | if (left < 4) { | |
309 | printk(KERN_DEBUG "%s: invalid hostscanresult info frame " | |
310 | "length %d\n", local->dev->name, left); | |
311 | return; | |
312 | } | |
313 | ||
314 | pos = (u16 *) buf; | |
315 | copy_len = result_size = le16_to_cpu(*pos); | |
316 | if (result_size == 0) { | |
317 | printk(KERN_DEBUG "%s: invalid result_size (0) in " | |
318 | "hostscanresults\n", local->dev->name); | |
319 | return; | |
320 | } | |
321 | if (copy_len > sizeof(struct hfa384x_hostscan_result)) | |
322 | copy_len = sizeof(struct hfa384x_hostscan_result); | |
323 | ||
324 | pos++; | |
325 | pos++; | |
326 | left -= 4; | |
327 | ptr = (u8 *) pos; | |
328 | ||
329 | new_count = left / result_size; | |
330 | results = kmalloc(new_count * sizeof(struct hfa384x_hostscan_result), | |
331 | GFP_ATOMIC); | |
332 | if (results == NULL) | |
333 | return; | |
334 | memset(results, 0, new_count * sizeof(struct hfa384x_hostscan_result)); | |
335 | ||
336 | for (i = 0; i < new_count; i++) { | |
337 | memcpy(&results[i], ptr, copy_len); | |
338 | ptr += result_size; | |
339 | left -= result_size; | |
340 | } | |
341 | ||
342 | if (left) { | |
343 | printk(KERN_DEBUG "%s: short HostScan result entry (%d/%d)\n", | |
344 | local->dev->name, left, result_size); | |
345 | } | |
346 | ||
347 | spin_lock_irqsave(&local->lock, flags); | |
348 | local->last_scan_type = PRISM2_HOSTSCAN; | |
2e4fd068 JM |
349 | prev = local->last_scan_results; |
350 | local->last_scan_results = results; | |
351 | local->last_scan_results_count = new_count; | |
ff1d2767 JM |
352 | spin_unlock_irqrestore(&local->lock, flags); |
353 | kfree(prev); | |
354 | ||
355 | hostap_report_scan_complete(local); | |
356 | } | |
357 | #endif /* PRISM2_NO_STATION_MODES */ | |
358 | ||
359 | ||
360 | /* Called only as a tasklet (software IRQ) */ | |
361 | void hostap_info_process(local_info_t *local, struct sk_buff *skb) | |
362 | { | |
363 | struct hfa384x_info_frame *info; | |
364 | unsigned char *buf; | |
365 | int left; | |
366 | #ifndef PRISM2_NO_DEBUG | |
367 | int i; | |
368 | #endif /* PRISM2_NO_DEBUG */ | |
369 | ||
370 | info = (struct hfa384x_info_frame *) skb->data; | |
371 | buf = skb->data + sizeof(*info); | |
372 | left = skb->len - sizeof(*info); | |
373 | ||
374 | switch (info->type) { | |
375 | case HFA384X_INFO_COMMTALLIES: | |
376 | prism2_info_commtallies(local, buf, left); | |
377 | break; | |
378 | ||
379 | #ifndef PRISM2_NO_STATION_MODES | |
380 | case HFA384X_INFO_LINKSTATUS: | |
381 | prism2_info_linkstatus(local, buf, left); | |
382 | break; | |
383 | ||
384 | case HFA384X_INFO_SCANRESULTS: | |
385 | prism2_info_scanresults(local, buf, left); | |
386 | break; | |
387 | ||
388 | case HFA384X_INFO_HOSTSCANRESULTS: | |
389 | prism2_info_hostscanresults(local, buf, left); | |
390 | break; | |
391 | #endif /* PRISM2_NO_STATION_MODES */ | |
392 | ||
393 | #ifndef PRISM2_NO_DEBUG | |
394 | default: | |
395 | PDEBUG(DEBUG_EXTRA, "%s: INFO - len=%d type=0x%04x\n", | |
396 | local->dev->name, info->len, info->type); | |
397 | PDEBUG(DEBUG_EXTRA, "Unknown info frame:"); | |
398 | for (i = 0; i < (left < 100 ? left : 100); i++) | |
399 | PDEBUG2(DEBUG_EXTRA, " %02x", buf[i]); | |
400 | PDEBUG2(DEBUG_EXTRA, "\n"); | |
401 | break; | |
402 | #endif /* PRISM2_NO_DEBUG */ | |
403 | } | |
404 | } | |
405 | ||
406 | ||
407 | #ifndef PRISM2_NO_STATION_MODES | |
408 | static void handle_info_queue_linkstatus(local_info_t *local) | |
409 | { | |
410 | int val = local->prev_link_status; | |
411 | int connected; | |
412 | union iwreq_data wrqu; | |
413 | ||
414 | connected = | |
415 | val == HFA384X_LINKSTATUS_CONNECTED || | |
416 | val == HFA384X_LINKSTATUS_AP_CHANGE || | |
417 | val == HFA384X_LINKSTATUS_AP_IN_RANGE; | |
418 | ||
419 | if (local->func->get_rid(local->dev, HFA384X_RID_CURRENTBSSID, | |
420 | local->bssid, ETH_ALEN, 1) < 0) { | |
421 | printk(KERN_DEBUG "%s: could not read CURRENTBSSID after " | |
422 | "LinkStatus event\n", local->dev->name); | |
423 | } else { | |
424 | PDEBUG(DEBUG_EXTRA, "%s: LinkStatus: BSSID=" MACSTR "\n", | |
425 | local->dev->name, | |
426 | MAC2STR((unsigned char *) local->bssid)); | |
427 | if (local->wds_type & HOSTAP_WDS_AP_CLIENT) | |
428 | hostap_add_sta(local->ap, local->bssid); | |
429 | } | |
430 | ||
431 | /* Get BSSID if we have a valid AP address */ | |
432 | if (connected) { | |
433 | netif_carrier_on(local->dev); | |
434 | netif_carrier_on(local->ddev); | |
435 | memcpy(wrqu.ap_addr.sa_data, local->bssid, ETH_ALEN); | |
436 | } else { | |
437 | netif_carrier_off(local->dev); | |
438 | netif_carrier_off(local->ddev); | |
439 | memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN); | |
440 | } | |
441 | wrqu.ap_addr.sa_family = ARPHRD_ETHER; | |
442 | ||
443 | /* | |
444 | * Filter out sequential disconnect events in order not to cause a | |
445 | * flood of SIOCGIWAP events that have a race condition with EAPOL | |
446 | * frames and can confuse wpa_supplicant about the current association | |
447 | * status. | |
448 | */ | |
449 | if (connected || local->prev_linkstatus_connected) | |
450 | wireless_send_event(local->dev, SIOCGIWAP, &wrqu, NULL); | |
451 | local->prev_linkstatus_connected = connected; | |
452 | } | |
453 | ||
454 | ||
455 | static void handle_info_queue_scanresults(local_info_t *local) | |
456 | { | |
457 | if (local->host_roaming == 1 && local->iw_mode == IW_MODE_INFRA) | |
458 | prism2_host_roaming(local); | |
0c629a69 JM |
459 | |
460 | if (local->host_roaming == 2 && local->iw_mode == IW_MODE_INFRA && | |
461 | memcmp(local->preferred_ap, "\x00\x00\x00\x00\x00\x00", | |
462 | ETH_ALEN) != 0) { | |
463 | /* | |
464 | * Firmware seems to be getting into odd state in host_roaming | |
465 | * mode 2 when hostscan is used without join command, so try | |
466 | * to fix this by re-joining the current AP. This does not | |
467 | * actually trigger a new association if the current AP is | |
468 | * still in the scan results. | |
469 | */ | |
470 | prism2_host_roaming(local); | |
471 | } | |
ff1d2767 JM |
472 | } |
473 | ||
474 | ||
475 | /* Called only as scheduled task after receiving info frames (used to avoid | |
476 | * pending too much time in HW IRQ handler). */ | |
c4028958 | 477 | static void handle_info_queue(struct work_struct *work) |
ff1d2767 | 478 | { |
c4028958 | 479 | local_info_t *local = container_of(work, local_info_t, info_queue); |
ff1d2767 JM |
480 | |
481 | if (test_and_clear_bit(PRISM2_INFO_PENDING_LINKSTATUS, | |
482 | &local->pending_info)) | |
483 | handle_info_queue_linkstatus(local); | |
484 | ||
485 | if (test_and_clear_bit(PRISM2_INFO_PENDING_SCANRESULTS, | |
486 | &local->pending_info)) | |
487 | handle_info_queue_scanresults(local); | |
488 | } | |
489 | #endif /* PRISM2_NO_STATION_MODES */ | |
490 | ||
491 | ||
492 | void hostap_info_init(local_info_t *local) | |
493 | { | |
494 | skb_queue_head_init(&local->info_list); | |
495 | #ifndef PRISM2_NO_STATION_MODES | |
c4028958 | 496 | INIT_WORK(&local->info_queue, handle_info_queue); |
ff1d2767 JM |
497 | #endif /* PRISM2_NO_STATION_MODES */ |
498 | } | |
499 | ||
500 | ||
501 | EXPORT_SYMBOL(hostap_info_init); | |
502 | EXPORT_SYMBOL(hostap_info_process); |