Commit | Line | Data |
---|---|---|
ff1d2767 JM |
1 | /* Host AP driver Info Frame processing (part of hostap.o module) */ |
2 | ||
3 | ||
4 | /* Called only as a tasklet (software IRQ) */ | |
5 | static void prism2_info_commtallies16(local_info_t *local, unsigned char *buf, | |
6 | int left) | |
7 | { | |
8 | struct hfa384x_comm_tallies *tallies; | |
9 | ||
10 | if (left < sizeof(struct hfa384x_comm_tallies)) { | |
11 | printk(KERN_DEBUG "%s: too short (len=%d) commtallies " | |
12 | "info frame\n", local->dev->name, left); | |
13 | return; | |
14 | } | |
15 | ||
16 | tallies = (struct hfa384x_comm_tallies *) buf; | |
17 | #define ADD_COMM_TALLIES(name) \ | |
18 | local->comm_tallies.name += le16_to_cpu(tallies->name) | |
19 | ADD_COMM_TALLIES(tx_unicast_frames); | |
20 | ADD_COMM_TALLIES(tx_multicast_frames); | |
21 | ADD_COMM_TALLIES(tx_fragments); | |
22 | ADD_COMM_TALLIES(tx_unicast_octets); | |
23 | ADD_COMM_TALLIES(tx_multicast_octets); | |
24 | ADD_COMM_TALLIES(tx_deferred_transmissions); | |
25 | ADD_COMM_TALLIES(tx_single_retry_frames); | |
26 | ADD_COMM_TALLIES(tx_multiple_retry_frames); | |
27 | ADD_COMM_TALLIES(tx_retry_limit_exceeded); | |
28 | ADD_COMM_TALLIES(tx_discards); | |
29 | ADD_COMM_TALLIES(rx_unicast_frames); | |
30 | ADD_COMM_TALLIES(rx_multicast_frames); | |
31 | ADD_COMM_TALLIES(rx_fragments); | |
32 | ADD_COMM_TALLIES(rx_unicast_octets); | |
33 | ADD_COMM_TALLIES(rx_multicast_octets); | |
34 | ADD_COMM_TALLIES(rx_fcs_errors); | |
35 | ADD_COMM_TALLIES(rx_discards_no_buffer); | |
36 | ADD_COMM_TALLIES(tx_discards_wrong_sa); | |
37 | ADD_COMM_TALLIES(rx_discards_wep_undecryptable); | |
38 | ADD_COMM_TALLIES(rx_message_in_msg_fragments); | |
39 | ADD_COMM_TALLIES(rx_message_in_bad_msg_fragments); | |
40 | #undef ADD_COMM_TALLIES | |
41 | } | |
42 | ||
43 | ||
44 | /* Called only as a tasklet (software IRQ) */ | |
45 | static void prism2_info_commtallies32(local_info_t *local, unsigned char *buf, | |
46 | int left) | |
47 | { | |
48 | struct hfa384x_comm_tallies32 *tallies; | |
49 | ||
50 | if (left < sizeof(struct hfa384x_comm_tallies32)) { | |
51 | printk(KERN_DEBUG "%s: too short (len=%d) commtallies32 " | |
52 | "info frame\n", local->dev->name, left); | |
53 | return; | |
54 | } | |
55 | ||
56 | tallies = (struct hfa384x_comm_tallies32 *) buf; | |
57 | #define ADD_COMM_TALLIES(name) \ | |
58 | local->comm_tallies.name += le32_to_cpu(tallies->name) | |
59 | ADD_COMM_TALLIES(tx_unicast_frames); | |
60 | ADD_COMM_TALLIES(tx_multicast_frames); | |
61 | ADD_COMM_TALLIES(tx_fragments); | |
62 | ADD_COMM_TALLIES(tx_unicast_octets); | |
63 | ADD_COMM_TALLIES(tx_multicast_octets); | |
64 | ADD_COMM_TALLIES(tx_deferred_transmissions); | |
65 | ADD_COMM_TALLIES(tx_single_retry_frames); | |
66 | ADD_COMM_TALLIES(tx_multiple_retry_frames); | |
67 | ADD_COMM_TALLIES(tx_retry_limit_exceeded); | |
68 | ADD_COMM_TALLIES(tx_discards); | |
69 | ADD_COMM_TALLIES(rx_unicast_frames); | |
70 | ADD_COMM_TALLIES(rx_multicast_frames); | |
71 | ADD_COMM_TALLIES(rx_fragments); | |
72 | ADD_COMM_TALLIES(rx_unicast_octets); | |
73 | ADD_COMM_TALLIES(rx_multicast_octets); | |
74 | ADD_COMM_TALLIES(rx_fcs_errors); | |
75 | ADD_COMM_TALLIES(rx_discards_no_buffer); | |
76 | ADD_COMM_TALLIES(tx_discards_wrong_sa); | |
77 | ADD_COMM_TALLIES(rx_discards_wep_undecryptable); | |
78 | ADD_COMM_TALLIES(rx_message_in_msg_fragments); | |
79 | ADD_COMM_TALLIES(rx_message_in_bad_msg_fragments); | |
80 | #undef ADD_COMM_TALLIES | |
81 | } | |
82 | ||
83 | ||
84 | /* Called only as a tasklet (software IRQ) */ | |
85 | static void prism2_info_commtallies(local_info_t *local, unsigned char *buf, | |
86 | int left) | |
87 | { | |
88 | if (local->tallies32) | |
89 | prism2_info_commtallies32(local, buf, left); | |
90 | else | |
91 | prism2_info_commtallies16(local, buf, left); | |
92 | } | |
93 | ||
94 | ||
95 | #ifndef PRISM2_NO_STATION_MODES | |
96 | #ifndef PRISM2_NO_DEBUG | |
97 | static const char* hfa384x_linkstatus_str(u16 linkstatus) | |
98 | { | |
99 | switch (linkstatus) { | |
100 | case HFA384X_LINKSTATUS_CONNECTED: | |
101 | return "Connected"; | |
102 | case HFA384X_LINKSTATUS_DISCONNECTED: | |
103 | return "Disconnected"; | |
104 | case HFA384X_LINKSTATUS_AP_CHANGE: | |
105 | return "Access point change"; | |
106 | case HFA384X_LINKSTATUS_AP_OUT_OF_RANGE: | |
107 | return "Access point out of range"; | |
108 | case HFA384X_LINKSTATUS_AP_IN_RANGE: | |
109 | return "Access point in range"; | |
110 | case HFA384X_LINKSTATUS_ASSOC_FAILED: | |
111 | return "Association failed"; | |
112 | default: | |
113 | return "Unknown"; | |
114 | } | |
115 | } | |
116 | #endif /* PRISM2_NO_DEBUG */ | |
117 | ||
118 | ||
119 | /* Called only as a tasklet (software IRQ) */ | |
120 | static void prism2_info_linkstatus(local_info_t *local, unsigned char *buf, | |
121 | int left) | |
122 | { | |
123 | u16 val; | |
124 | int non_sta_mode; | |
125 | ||
126 | /* Alloc new JoinRequests to occur since LinkStatus for the previous | |
127 | * has been received */ | |
128 | local->last_join_time = 0; | |
129 | ||
130 | if (left != 2) { | |
131 | printk(KERN_DEBUG "%s: invalid linkstatus info frame " | |
132 | "length %d\n", local->dev->name, left); | |
133 | return; | |
134 | } | |
135 | ||
136 | non_sta_mode = local->iw_mode == IW_MODE_MASTER || | |
137 | local->iw_mode == IW_MODE_REPEAT || | |
138 | local->iw_mode == IW_MODE_MONITOR; | |
139 | ||
140 | val = buf[0] | (buf[1] << 8); | |
141 | if (!non_sta_mode || val != HFA384X_LINKSTATUS_DISCONNECTED) { | |
142 | PDEBUG(DEBUG_EXTRA, "%s: LinkStatus=%d (%s)\n", | |
143 | local->dev->name, val, hfa384x_linkstatus_str(val)); | |
144 | } | |
145 | ||
146 | if (non_sta_mode) { | |
147 | netif_carrier_on(local->dev); | |
148 | netif_carrier_on(local->ddev); | |
149 | return; | |
150 | } | |
151 | ||
152 | /* Get current BSSID later in scheduled task */ | |
153 | set_bit(PRISM2_INFO_PENDING_LINKSTATUS, &local->pending_info); | |
154 | local->prev_link_status = val; | |
155 | schedule_work(&local->info_queue); | |
156 | } | |
157 | ||
158 | ||
159 | static void prism2_host_roaming(local_info_t *local) | |
160 | { | |
161 | struct hfa384x_join_request req; | |
162 | struct net_device *dev = local->dev; | |
2e4fd068 | 163 | struct hfa384x_hostscan_result *selected, *entry; |
ff1d2767 JM |
164 | int i; |
165 | unsigned long flags; | |
166 | ||
167 | if (local->last_join_time && | |
168 | time_before(jiffies, local->last_join_time + 10 * HZ)) { | |
169 | PDEBUG(DEBUG_EXTRA, "%s: last join request has not yet been " | |
170 | "completed - waiting for it before issuing new one\n", | |
171 | dev->name); | |
172 | return; | |
173 | } | |
174 | ||
175 | /* ScanResults are sorted: first ESS results in decreasing signal | |
176 | * quality then IBSS results in similar order. | |
177 | * Trivial roaming policy: just select the first entry. | |
178 | * This could probably be improved by adding hysteresis to limit | |
179 | * number of handoffs, etc. | |
180 | * | |
181 | * Could do periodic RID_SCANREQUEST or Inquire F101 to get new | |
182 | * ScanResults */ | |
183 | spin_lock_irqsave(&local->lock, flags); | |
184 | if (local->last_scan_results == NULL || | |
185 | local->last_scan_results_count == 0) { | |
186 | spin_unlock_irqrestore(&local->lock, flags); | |
187 | PDEBUG(DEBUG_EXTRA, "%s: no scan results for host roaming\n", | |
188 | dev->name); | |
189 | return; | |
190 | } | |
191 | ||
192 | selected = &local->last_scan_results[0]; | |
193 | ||
194 | if (local->preferred_ap[0] || local->preferred_ap[1] || | |
195 | local->preferred_ap[2] || local->preferred_ap[3] || | |
196 | local->preferred_ap[4] || local->preferred_ap[5]) { | |
197 | /* Try to find preferred AP */ | |
198 | PDEBUG(DEBUG_EXTRA, "%s: Preferred AP BSSID " MACSTR "\n", | |
199 | dev->name, MAC2STR(local->preferred_ap)); | |
200 | for (i = 0; i < local->last_scan_results_count; i++) { | |
201 | entry = &local->last_scan_results[i]; | |
202 | if (memcmp(local->preferred_ap, entry->bssid, 6) == 0) | |
203 | { | |
204 | PDEBUG(DEBUG_EXTRA, "%s: using preferred AP " | |
205 | "selection\n", dev->name); | |
206 | selected = entry; | |
207 | break; | |
208 | } | |
209 | } | |
210 | } | |
211 | ||
212 | memcpy(req.bssid, selected->bssid, 6); | |
213 | req.channel = selected->chid; | |
214 | spin_unlock_irqrestore(&local->lock, flags); | |
215 | ||
216 | PDEBUG(DEBUG_EXTRA, "%s: JoinRequest: BSSID=" MACSTR " channel=%d\n", | |
217 | dev->name, MAC2STR(req.bssid), le16_to_cpu(req.channel)); | |
218 | if (local->func->set_rid(dev, HFA384X_RID_JOINREQUEST, &req, | |
219 | sizeof(req))) { | |
220 | printk(KERN_DEBUG "%s: JoinRequest failed\n", dev->name); | |
221 | } | |
222 | local->last_join_time = jiffies; | |
223 | } | |
224 | ||
225 | ||
226 | static void hostap_report_scan_complete(local_info_t *local) | |
227 | { | |
228 | union iwreq_data wrqu; | |
229 | ||
230 | /* Inform user space about new scan results (just empty event, | |
231 | * SIOCGIWSCAN can be used to fetch data */ | |
232 | wrqu.data.length = 0; | |
233 | wrqu.data.flags = 0; | |
234 | wireless_send_event(local->dev, SIOCGIWSCAN, &wrqu, NULL); | |
235 | ||
236 | /* Allow SIOCGIWSCAN handling to occur since we have received | |
237 | * scanning result */ | |
238 | local->scan_timestamp = 0; | |
239 | } | |
240 | ||
241 | ||
242 | /* Called only as a tasklet (software IRQ) */ | |
243 | static void prism2_info_scanresults(local_info_t *local, unsigned char *buf, | |
244 | int left) | |
245 | { | |
246 | u16 *pos; | |
2e4fd068 | 247 | int new_count, i; |
ff1d2767 | 248 | unsigned long flags; |
2e4fd068 JM |
249 | struct hfa384x_scan_result *res; |
250 | struct hfa384x_hostscan_result *results, *prev; | |
ff1d2767 JM |
251 | |
252 | if (left < 4) { | |
253 | printk(KERN_DEBUG "%s: invalid scanresult info frame " | |
254 | "length %d\n", local->dev->name, left); | |
255 | return; | |
256 | } | |
257 | ||
258 | pos = (u16 *) buf; | |
259 | pos++; | |
260 | pos++; | |
261 | left -= 4; | |
262 | ||
263 | new_count = left / sizeof(struct hfa384x_scan_result); | |
2e4fd068 | 264 | results = kmalloc(new_count * sizeof(struct hfa384x_hostscan_result), |
ff1d2767 JM |
265 | GFP_ATOMIC); |
266 | if (results == NULL) | |
267 | return; | |
2e4fd068 JM |
268 | |
269 | /* Convert to hostscan result format. */ | |
270 | res = (struct hfa384x_scan_result *) pos; | |
271 | for (i = 0; i < new_count; i++) { | |
272 | memcpy(&results[i], &res[i], | |
273 | sizeof(struct hfa384x_scan_result)); | |
274 | results[i].atim = 0; | |
275 | } | |
ff1d2767 JM |
276 | |
277 | spin_lock_irqsave(&local->lock, flags); | |
278 | local->last_scan_type = PRISM2_SCAN; | |
279 | prev = local->last_scan_results; | |
280 | local->last_scan_results = results; | |
281 | local->last_scan_results_count = new_count; | |
282 | spin_unlock_irqrestore(&local->lock, flags); | |
283 | kfree(prev); | |
284 | ||
285 | hostap_report_scan_complete(local); | |
286 | ||
287 | /* Perform rest of ScanResults handling later in scheduled task */ | |
288 | set_bit(PRISM2_INFO_PENDING_SCANRESULTS, &local->pending_info); | |
289 | schedule_work(&local->info_queue); | |
290 | } | |
291 | ||
292 | ||
293 | /* Called only as a tasklet (software IRQ) */ | |
294 | static void prism2_info_hostscanresults(local_info_t *local, | |
295 | unsigned char *buf, int left) | |
296 | { | |
297 | int i, result_size, copy_len, new_count; | |
298 | struct hfa384x_hostscan_result *results, *prev; | |
299 | unsigned long flags; | |
300 | u16 *pos; | |
301 | u8 *ptr; | |
302 | ||
303 | wake_up_interruptible(&local->hostscan_wq); | |
304 | ||
305 | if (left < 4) { | |
306 | printk(KERN_DEBUG "%s: invalid hostscanresult info frame " | |
307 | "length %d\n", local->dev->name, left); | |
308 | return; | |
309 | } | |
310 | ||
311 | pos = (u16 *) buf; | |
312 | copy_len = result_size = le16_to_cpu(*pos); | |
313 | if (result_size == 0) { | |
314 | printk(KERN_DEBUG "%s: invalid result_size (0) in " | |
315 | "hostscanresults\n", local->dev->name); | |
316 | return; | |
317 | } | |
318 | if (copy_len > sizeof(struct hfa384x_hostscan_result)) | |
319 | copy_len = sizeof(struct hfa384x_hostscan_result); | |
320 | ||
321 | pos++; | |
322 | pos++; | |
323 | left -= 4; | |
324 | ptr = (u8 *) pos; | |
325 | ||
326 | new_count = left / result_size; | |
327 | results = kmalloc(new_count * sizeof(struct hfa384x_hostscan_result), | |
328 | GFP_ATOMIC); | |
329 | if (results == NULL) | |
330 | return; | |
331 | memset(results, 0, new_count * sizeof(struct hfa384x_hostscan_result)); | |
332 | ||
333 | for (i = 0; i < new_count; i++) { | |
334 | memcpy(&results[i], ptr, copy_len); | |
335 | ptr += result_size; | |
336 | left -= result_size; | |
337 | } | |
338 | ||
339 | if (left) { | |
340 | printk(KERN_DEBUG "%s: short HostScan result entry (%d/%d)\n", | |
341 | local->dev->name, left, result_size); | |
342 | } | |
343 | ||
344 | spin_lock_irqsave(&local->lock, flags); | |
345 | local->last_scan_type = PRISM2_HOSTSCAN; | |
2e4fd068 JM |
346 | prev = local->last_scan_results; |
347 | local->last_scan_results = results; | |
348 | local->last_scan_results_count = new_count; | |
ff1d2767 JM |
349 | spin_unlock_irqrestore(&local->lock, flags); |
350 | kfree(prev); | |
351 | ||
352 | hostap_report_scan_complete(local); | |
353 | } | |
354 | #endif /* PRISM2_NO_STATION_MODES */ | |
355 | ||
356 | ||
357 | /* Called only as a tasklet (software IRQ) */ | |
358 | void hostap_info_process(local_info_t *local, struct sk_buff *skb) | |
359 | { | |
360 | struct hfa384x_info_frame *info; | |
361 | unsigned char *buf; | |
362 | int left; | |
363 | #ifndef PRISM2_NO_DEBUG | |
364 | int i; | |
365 | #endif /* PRISM2_NO_DEBUG */ | |
366 | ||
367 | info = (struct hfa384x_info_frame *) skb->data; | |
368 | buf = skb->data + sizeof(*info); | |
369 | left = skb->len - sizeof(*info); | |
370 | ||
371 | switch (info->type) { | |
372 | case HFA384X_INFO_COMMTALLIES: | |
373 | prism2_info_commtallies(local, buf, left); | |
374 | break; | |
375 | ||
376 | #ifndef PRISM2_NO_STATION_MODES | |
377 | case HFA384X_INFO_LINKSTATUS: | |
378 | prism2_info_linkstatus(local, buf, left); | |
379 | break; | |
380 | ||
381 | case HFA384X_INFO_SCANRESULTS: | |
382 | prism2_info_scanresults(local, buf, left); | |
383 | break; | |
384 | ||
385 | case HFA384X_INFO_HOSTSCANRESULTS: | |
386 | prism2_info_hostscanresults(local, buf, left); | |
387 | break; | |
388 | #endif /* PRISM2_NO_STATION_MODES */ | |
389 | ||
390 | #ifndef PRISM2_NO_DEBUG | |
391 | default: | |
392 | PDEBUG(DEBUG_EXTRA, "%s: INFO - len=%d type=0x%04x\n", | |
393 | local->dev->name, info->len, info->type); | |
394 | PDEBUG(DEBUG_EXTRA, "Unknown info frame:"); | |
395 | for (i = 0; i < (left < 100 ? left : 100); i++) | |
396 | PDEBUG2(DEBUG_EXTRA, " %02x", buf[i]); | |
397 | PDEBUG2(DEBUG_EXTRA, "\n"); | |
398 | break; | |
399 | #endif /* PRISM2_NO_DEBUG */ | |
400 | } | |
401 | } | |
402 | ||
403 | ||
404 | #ifndef PRISM2_NO_STATION_MODES | |
405 | static void handle_info_queue_linkstatus(local_info_t *local) | |
406 | { | |
407 | int val = local->prev_link_status; | |
408 | int connected; | |
409 | union iwreq_data wrqu; | |
410 | ||
411 | connected = | |
412 | val == HFA384X_LINKSTATUS_CONNECTED || | |
413 | val == HFA384X_LINKSTATUS_AP_CHANGE || | |
414 | val == HFA384X_LINKSTATUS_AP_IN_RANGE; | |
415 | ||
416 | if (local->func->get_rid(local->dev, HFA384X_RID_CURRENTBSSID, | |
417 | local->bssid, ETH_ALEN, 1) < 0) { | |
418 | printk(KERN_DEBUG "%s: could not read CURRENTBSSID after " | |
419 | "LinkStatus event\n", local->dev->name); | |
420 | } else { | |
421 | PDEBUG(DEBUG_EXTRA, "%s: LinkStatus: BSSID=" MACSTR "\n", | |
422 | local->dev->name, | |
423 | MAC2STR((unsigned char *) local->bssid)); | |
424 | if (local->wds_type & HOSTAP_WDS_AP_CLIENT) | |
425 | hostap_add_sta(local->ap, local->bssid); | |
426 | } | |
427 | ||
428 | /* Get BSSID if we have a valid AP address */ | |
429 | if (connected) { | |
430 | netif_carrier_on(local->dev); | |
431 | netif_carrier_on(local->ddev); | |
432 | memcpy(wrqu.ap_addr.sa_data, local->bssid, ETH_ALEN); | |
433 | } else { | |
434 | netif_carrier_off(local->dev); | |
435 | netif_carrier_off(local->ddev); | |
436 | memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN); | |
437 | } | |
438 | wrqu.ap_addr.sa_family = ARPHRD_ETHER; | |
439 | ||
440 | /* | |
441 | * Filter out sequential disconnect events in order not to cause a | |
442 | * flood of SIOCGIWAP events that have a race condition with EAPOL | |
443 | * frames and can confuse wpa_supplicant about the current association | |
444 | * status. | |
445 | */ | |
446 | if (connected || local->prev_linkstatus_connected) | |
447 | wireless_send_event(local->dev, SIOCGIWAP, &wrqu, NULL); | |
448 | local->prev_linkstatus_connected = connected; | |
449 | } | |
450 | ||
451 | ||
452 | static void handle_info_queue_scanresults(local_info_t *local) | |
453 | { | |
454 | if (local->host_roaming == 1 && local->iw_mode == IW_MODE_INFRA) | |
455 | prism2_host_roaming(local); | |
0c629a69 JM |
456 | |
457 | if (local->host_roaming == 2 && local->iw_mode == IW_MODE_INFRA && | |
458 | memcmp(local->preferred_ap, "\x00\x00\x00\x00\x00\x00", | |
459 | ETH_ALEN) != 0) { | |
460 | /* | |
461 | * Firmware seems to be getting into odd state in host_roaming | |
462 | * mode 2 when hostscan is used without join command, so try | |
463 | * to fix this by re-joining the current AP. This does not | |
464 | * actually trigger a new association if the current AP is | |
465 | * still in the scan results. | |
466 | */ | |
467 | prism2_host_roaming(local); | |
468 | } | |
ff1d2767 JM |
469 | } |
470 | ||
471 | ||
472 | /* Called only as scheduled task after receiving info frames (used to avoid | |
473 | * pending too much time in HW IRQ handler). */ | |
474 | static void handle_info_queue(void *data) | |
475 | { | |
476 | local_info_t *local = (local_info_t *) data; | |
477 | ||
478 | if (test_and_clear_bit(PRISM2_INFO_PENDING_LINKSTATUS, | |
479 | &local->pending_info)) | |
480 | handle_info_queue_linkstatus(local); | |
481 | ||
482 | if (test_and_clear_bit(PRISM2_INFO_PENDING_SCANRESULTS, | |
483 | &local->pending_info)) | |
484 | handle_info_queue_scanresults(local); | |
485 | } | |
486 | #endif /* PRISM2_NO_STATION_MODES */ | |
487 | ||
488 | ||
489 | void hostap_info_init(local_info_t *local) | |
490 | { | |
491 | skb_queue_head_init(&local->info_list); | |
492 | #ifndef PRISM2_NO_STATION_MODES | |
493 | INIT_WORK(&local->info_queue, handle_info_queue, local); | |
494 | #endif /* PRISM2_NO_STATION_MODES */ | |
495 | } | |
496 | ||
497 | ||
498 | EXPORT_SYMBOL(hostap_info_init); | |
499 | EXPORT_SYMBOL(hostap_info_process); |