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ARM: mm: Recreate kernel mappings in early_paging_init()
[linux/fpc-iii.git] / drivers / net / wireless / hostap / hostap_ap.c
blobd6033a8e5deaf16319d6ab6688b99544dc1f1a0c
1 /*
2 * Intersil Prism2 driver with Host AP (software access point) support
3 * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
4 * <j@w1.fi>
5 * Copyright (c) 2002-2005, Jouni Malinen <j@w1.fi>
6 *
7 * This file is to be included into hostap.c when S/W AP functionality is
8 * compiled.
9 *
10 * AP: FIX:
11 * - if unicast Class 2 (assoc,reassoc,disassoc) frame received from
12 * unauthenticated STA, send deauth. frame (8802.11: 5.5)
13 * - if unicast Class 3 (data with to/from DS,deauth,pspoll) frame received
14 * from authenticated, but unassoc STA, send disassoc frame (8802.11: 5.5)
15 * - if unicast Class 3 received from unauthenticated STA, send deauth. frame
16 * (8802.11: 5.5)
17 */
18
19 #include <linux/proc_fs.h>
20 #include <linux/seq_file.h>
21 #include <linux/delay.h>
22 #include <linux/random.h>
23 #include <linux/if_arp.h>
24 #include <linux/slab.h>
25 #include <linux/export.h>
26 #include <linux/moduleparam.h>
27
28 #include "hostap_wlan.h"
29 #include "hostap.h"
30 #include "hostap_ap.h"
31
32 static int other_ap_policy[MAX_PARM_DEVICES] = { AP_OTHER_AP_SKIP_ALL,
33 DEF_INTS };
34 module_param_array(other_ap_policy, int, NULL, 0444);
35 MODULE_PARM_DESC(other_ap_policy, "Other AP beacon monitoring policy (0-3)");
36
37 static int ap_max_inactivity[MAX_PARM_DEVICES] = { AP_MAX_INACTIVITY_SEC,
38 DEF_INTS };
39 module_param_array(ap_max_inactivity, int, NULL, 0444);
40 MODULE_PARM_DESC(ap_max_inactivity, "AP timeout (in seconds) for station "
41 "inactivity");
42
43 static int ap_bridge_packets[MAX_PARM_DEVICES] = { 1, DEF_INTS };
44 module_param_array(ap_bridge_packets, int, NULL, 0444);
45 MODULE_PARM_DESC(ap_bridge_packets, "Bridge packets directly between "
46 "stations");
47
48 static int autom_ap_wds[MAX_PARM_DEVICES] = { 0, DEF_INTS };
49 module_param_array(autom_ap_wds, int, NULL, 0444);
50 MODULE_PARM_DESC(autom_ap_wds, "Add WDS connections to other APs "
51 "automatically");
52
53
54 static struct sta_info* ap_get_sta(struct ap_data *ap, u8 *sta);
55 static void hostap_event_expired_sta(struct net_device *dev,
56 struct sta_info *sta);
57 static void handle_add_proc_queue(struct work_struct *work);
58
59 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
60 static void handle_wds_oper_queue(struct work_struct *work);
61 static void prism2_send_mgmt(struct net_device *dev,
62 u16 type_subtype, char *body,
63 int body_len, u8 *addr, u16 tx_cb_idx);
64 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
65
66
67 #ifndef PRISM2_NO_PROCFS_DEBUG
68 static int ap_debug_proc_show(struct seq_file *m, void *v)
69 {
70 struct ap_data *ap = m->private;
71
72 seq_printf(m, "BridgedUnicastFrames=%u\n", ap->bridged_unicast);
73 seq_printf(m, "BridgedMulticastFrames=%u\n", ap->bridged_multicast);
74 seq_printf(m, "max_inactivity=%u\n", ap->max_inactivity / HZ);
75 seq_printf(m, "bridge_packets=%u\n", ap->bridge_packets);
76 seq_printf(m, "nullfunc_ack=%u\n", ap->nullfunc_ack);
77 seq_printf(m, "autom_ap_wds=%u\n", ap->autom_ap_wds);
78 seq_printf(m, "auth_algs=%u\n", ap->local->auth_algs);
79 seq_printf(m, "tx_drop_nonassoc=%u\n", ap->tx_drop_nonassoc);
80 return 0;
81 }
82
83 static int ap_debug_proc_open(struct inode *inode, struct file *file)
84 {
85 return single_open(file, ap_debug_proc_show, PDE_DATA(inode));
86 }
87
88 static const struct file_operations ap_debug_proc_fops = {
89 .open = ap_debug_proc_open,
90 .read = seq_read,
91 .llseek = seq_lseek,
92 .release = single_release,
93 };
94 #endif /* PRISM2_NO_PROCFS_DEBUG */
95
96
97 static void ap_sta_hash_add(struct ap_data *ap, struct sta_info *sta)
98 {
99 sta->hnext = ap->sta_hash[STA_HASH(sta->addr)];
100 ap->sta_hash[STA_HASH(sta->addr)] = sta;
101 }
102
103 static void ap_sta_hash_del(struct ap_data *ap, struct sta_info *sta)
104 {
105 struct sta_info *s;
106
107 s = ap->sta_hash[STA_HASH(sta->addr)];
108 if (s == NULL) return;
109 if (memcmp(s->addr, sta->addr, ETH_ALEN) == 0) {
110 ap->sta_hash[STA_HASH(sta->addr)] = s->hnext;
111 return;
112 }
113
114 while (s->hnext != NULL && memcmp(s->hnext->addr, sta->addr, ETH_ALEN)
115 != 0)
116 s = s->hnext;
117 if (s->hnext != NULL)
118 s->hnext = s->hnext->hnext;
119 else
120 printk("AP: could not remove STA %pM from hash table\n",
121 sta->addr);
122 }
123
124 static void ap_free_sta(struct ap_data *ap, struct sta_info *sta)
125 {
126 if (sta->ap && sta->local)
127 hostap_event_expired_sta(sta->local->dev, sta);
128
129 if (ap->proc != NULL) {
130 char name[20];
131 sprintf(name, "%pM", sta->addr);
132 remove_proc_entry(name, ap->proc);
133 }
134
135 if (sta->crypt) {
136 sta->crypt->ops->deinit(sta->crypt->priv);
137 kfree(sta->crypt);
138 sta->crypt = NULL;
139 }
140
141 skb_queue_purge(&sta->tx_buf);
142
143 ap->num_sta--;
144 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
145 if (sta->aid > 0)
146 ap->sta_aid[sta->aid - 1] = NULL;
147
148 if (!sta->ap && sta->u.sta.challenge)
149 kfree(sta->u.sta.challenge);
150 del_timer(&sta->timer);
151 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
152
153 kfree(sta);
154 }
155
156
157 static void hostap_set_tim(local_info_t *local, int aid, int set)
158 {
159 if (local->func->set_tim)
160 local->func->set_tim(local->dev, aid, set);
161 }
162
163
164 static void hostap_event_new_sta(struct net_device *dev, struct sta_info *sta)
165 {
166 union iwreq_data wrqu;
167 memset(&wrqu, 0, sizeof(wrqu));
168 memcpy(wrqu.addr.sa_data, sta->addr, ETH_ALEN);
169 wrqu.addr.sa_family = ARPHRD_ETHER;
170 wireless_send_event(dev, IWEVREGISTERED, &wrqu, NULL);
171 }
172
173
174 static void hostap_event_expired_sta(struct net_device *dev,
175 struct sta_info *sta)
176 {
177 union iwreq_data wrqu;
178 memset(&wrqu, 0, sizeof(wrqu));
179 memcpy(wrqu.addr.sa_data, sta->addr, ETH_ALEN);
180 wrqu.addr.sa_family = ARPHRD_ETHER;
181 wireless_send_event(dev, IWEVEXPIRED, &wrqu, NULL);
182 }
183
184
185 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
186
187 static void ap_handle_timer(unsigned long data)
188 {
189 struct sta_info *sta = (struct sta_info *) data;
190 local_info_t *local;
191 struct ap_data *ap;
192 unsigned long next_time = 0;
193 int was_assoc;
194
195 if (sta == NULL || sta->local == NULL || sta->local->ap == NULL) {
196 PDEBUG(DEBUG_AP, "ap_handle_timer() called with NULL data\n");
197 return;
198 }
199
200 local = sta->local;
201 ap = local->ap;
202 was_assoc = sta->flags & WLAN_STA_ASSOC;
203
204 if (atomic_read(&sta->users) != 0)
205 next_time = jiffies + HZ;
206 else if ((sta->flags & WLAN_STA_PERM) && !(sta->flags & WLAN_STA_AUTH))
207 next_time = jiffies + ap->max_inactivity;
208
209 if (time_before(jiffies, sta->last_rx + ap->max_inactivity)) {
210 /* station activity detected; reset timeout state */
211 sta->timeout_next = STA_NULLFUNC;
212 next_time = sta->last_rx + ap->max_inactivity;
213 } else if (sta->timeout_next == STA_DISASSOC &&
214 !(sta->flags & WLAN_STA_PENDING_POLL)) {
215 /* STA ACKed data nullfunc frame poll */
216 sta->timeout_next = STA_NULLFUNC;
217 next_time = jiffies + ap->max_inactivity;
218 }
219
220 if (next_time) {
221 sta->timer.expires = next_time;
222 add_timer(&sta->timer);
223 return;
224 }
225
226 if (sta->ap)
227 sta->timeout_next = STA_DEAUTH;
228
229 if (sta->timeout_next == STA_DEAUTH && !(sta->flags & WLAN_STA_PERM)) {
230 spin_lock(&ap->sta_table_lock);
231 ap_sta_hash_del(ap, sta);
232 list_del(&sta->list);
233 spin_unlock(&ap->sta_table_lock);
234 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
235 } else if (sta->timeout_next == STA_DISASSOC)
236 sta->flags &= ~WLAN_STA_ASSOC;
237
238 if (was_assoc && !(sta->flags & WLAN_STA_ASSOC) && !sta->ap)
239 hostap_event_expired_sta(local->dev, sta);
240
241 if (sta->timeout_next == STA_DEAUTH && sta->aid > 0 &&
242 !skb_queue_empty(&sta->tx_buf)) {
243 hostap_set_tim(local, sta->aid, 0);
244 sta->flags &= ~WLAN_STA_TIM;
245 }
246
247 if (sta->ap) {
248 if (ap->autom_ap_wds) {
249 PDEBUG(DEBUG_AP, "%s: removing automatic WDS "
250 "connection to AP %pM\n",
251 local->dev->name, sta->addr);
252 hostap_wds_link_oper(local, sta->addr, WDS_DEL);
253 }
254 } else if (sta->timeout_next == STA_NULLFUNC) {
255 /* send data frame to poll STA and check whether this frame
256 * is ACKed */
257 /* FIX: IEEE80211_STYPE_NULLFUNC would be more appropriate, but
258 * it is apparently not retried so TX Exc events are not
259 * received for it */
260 sta->flags |= WLAN_STA_PENDING_POLL;
261 prism2_send_mgmt(local->dev, IEEE80211_FTYPE_DATA |
262 IEEE80211_STYPE_DATA, NULL, 0,
263 sta->addr, ap->tx_callback_poll);
264 } else {
265 int deauth = sta->timeout_next == STA_DEAUTH;
266 __le16 resp;
267 PDEBUG(DEBUG_AP, "%s: sending %s info to STA %pM"
268 "(last=%lu, jiffies=%lu)\n",
269 local->dev->name,
270 deauth ? "deauthentication" : "disassociation",
271 sta->addr, sta->last_rx, jiffies);
272
273 resp = cpu_to_le16(deauth ? WLAN_REASON_PREV_AUTH_NOT_VALID :
274 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
275 prism2_send_mgmt(local->dev, IEEE80211_FTYPE_MGMT |
276 (deauth ? IEEE80211_STYPE_DEAUTH :
277 IEEE80211_STYPE_DISASSOC),
278 (char *) &resp, 2, sta->addr, 0);
279 }
280
281 if (sta->timeout_next == STA_DEAUTH) {
282 if (sta->flags & WLAN_STA_PERM) {
283 PDEBUG(DEBUG_AP, "%s: STA %pM"
284 " would have been removed, "
285 "but it has 'perm' flag\n",
286 local->dev->name, sta->addr);
287 } else
288 ap_free_sta(ap, sta);
289 return;
290 }
291
292 if (sta->timeout_next == STA_NULLFUNC) {
293 sta->timeout_next = STA_DISASSOC;
294 sta->timer.expires = jiffies + AP_DISASSOC_DELAY;
295 } else {
296 sta->timeout_next = STA_DEAUTH;
297 sta->timer.expires = jiffies + AP_DEAUTH_DELAY;
298 }
299
300 add_timer(&sta->timer);
301 }
302
303
304 void hostap_deauth_all_stas(struct net_device *dev, struct ap_data *ap,
305 int resend)
306 {
307 u8 addr[ETH_ALEN];
308 __le16 resp;
309 int i;
310
311 PDEBUG(DEBUG_AP, "%s: Deauthenticate all stations\n", dev->name);
312 memset(addr, 0xff, ETH_ALEN);
313
314 resp = cpu_to_le16(WLAN_REASON_PREV_AUTH_NOT_VALID);
315
316 /* deauth message sent; try to resend it few times; the message is
317 * broadcast, so it may be delayed until next DTIM; there is not much
318 * else we can do at this point since the driver is going to be shut
319 * down */
320 for (i = 0; i < 5; i++) {
321 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT |
322 IEEE80211_STYPE_DEAUTH,
323 (char *) &resp, 2, addr, 0);
324
325 if (!resend || ap->num_sta <= 0)
326 return;
327
328 mdelay(50);
329 }
330 }
331
332
333 static int ap_control_proc_show(struct seq_file *m, void *v)
334 {
335 struct ap_data *ap = m->private;
336 char *policy_txt;
337 struct mac_entry *entry;
338
339 if (v == SEQ_START_TOKEN) {
340 switch (ap->mac_restrictions.policy) {
341 case MAC_POLICY_OPEN:
342 policy_txt = "open";
343 break;
344 case MAC_POLICY_ALLOW:
345 policy_txt = "allow";
346 break;
347 case MAC_POLICY_DENY:
348 policy_txt = "deny";
349 break;
350 default:
351 policy_txt = "unknown";
352 break;
353 }
354 seq_printf(m, "MAC policy: %s\n", policy_txt);
355 seq_printf(m, "MAC entries: %u\n", ap->mac_restrictions.entries);
356 seq_puts(m, "MAC list:\n");
357 return 0;
358 }
359
360 entry = v;
361 seq_printf(m, "%pM\n", entry->addr);
362 return 0;
363 }
364
365 static void *ap_control_proc_start(struct seq_file *m, loff_t *_pos)
366 {
367 struct ap_data *ap = m->private;
368 spin_lock_bh(&ap->mac_restrictions.lock);
369 return seq_list_start_head(&ap->mac_restrictions.mac_list, *_pos);
370 }
371
372 static void *ap_control_proc_next(struct seq_file *m, void *v, loff_t *_pos)
373 {
374 struct ap_data *ap = m->private;
375 return seq_list_next(v, &ap->mac_restrictions.mac_list, _pos);
376 }
377
378 static void ap_control_proc_stop(struct seq_file *m, void *v)
379 {
380 struct ap_data *ap = m->private;
381 spin_unlock_bh(&ap->mac_restrictions.lock);
382 }
383
384 static const struct seq_operations ap_control_proc_seqops = {
385 .start = ap_control_proc_start,
386 .next = ap_control_proc_next,
387 .stop = ap_control_proc_stop,
388 .show = ap_control_proc_show,
389 };
390
391 static int ap_control_proc_open(struct inode *inode, struct file *file)
392 {
393 int ret = seq_open(file, &ap_control_proc_seqops);
394 if (ret == 0) {
395 struct seq_file *m = file->private_data;
396 m->private = PDE_DATA(inode);
397 }
398 return ret;
399 }
400
401 static const struct file_operations ap_control_proc_fops = {
402 .open = ap_control_proc_open,
403 .read = seq_read,
404 .llseek = seq_lseek,
405 .release = seq_release,
406 };
407
408
409 int ap_control_add_mac(struct mac_restrictions *mac_restrictions, u8 *mac)
410 {
411 struct mac_entry *entry;
412
413 entry = kmalloc(sizeof(struct mac_entry), GFP_KERNEL);
414 if (entry == NULL)
415 return -ENOMEM;
416
417 memcpy(entry->addr, mac, ETH_ALEN);
418
419 spin_lock_bh(&mac_restrictions->lock);
420 list_add_tail(&entry->list, &mac_restrictions->mac_list);
421 mac_restrictions->entries++;
422 spin_unlock_bh(&mac_restrictions->lock);
423
424 return 0;
425 }
426
427
428 int ap_control_del_mac(struct mac_restrictions *mac_restrictions, u8 *mac)
429 {
430 struct list_head *ptr;
431 struct mac_entry *entry;
432
433 spin_lock_bh(&mac_restrictions->lock);
434 for (ptr = mac_restrictions->mac_list.next;
435 ptr != &mac_restrictions->mac_list; ptr = ptr->next) {
436 entry = list_entry(ptr, struct mac_entry, list);
437
438 if (memcmp(entry->addr, mac, ETH_ALEN) == 0) {
439 list_del(ptr);
440 kfree(entry);
441 mac_restrictions->entries--;
442 spin_unlock_bh(&mac_restrictions->lock);
443 return 0;
444 }
445 }
446 spin_unlock_bh(&mac_restrictions->lock);
447 return -1;
448 }
449
450
451 static int ap_control_mac_deny(struct mac_restrictions *mac_restrictions,
452 u8 *mac)
453 {
454 struct mac_entry *entry;
455 int found = 0;
456
457 if (mac_restrictions->policy == MAC_POLICY_OPEN)
458 return 0;
459
460 spin_lock_bh(&mac_restrictions->lock);
461 list_for_each_entry(entry, &mac_restrictions->mac_list, list) {
462 if (memcmp(entry->addr, mac, ETH_ALEN) == 0) {
463 found = 1;
464 break;
465 }
466 }
467 spin_unlock_bh(&mac_restrictions->lock);
468
469 if (mac_restrictions->policy == MAC_POLICY_ALLOW)
470 return !found;
471 else
472 return found;
473 }
474
475
476 void ap_control_flush_macs(struct mac_restrictions *mac_restrictions)
477 {
478 struct list_head *ptr, *n;
479 struct mac_entry *entry;
480
481 if (mac_restrictions->entries == 0)
482 return;
483
484 spin_lock_bh(&mac_restrictions->lock);
485 for (ptr = mac_restrictions->mac_list.next, n = ptr->next;
486 ptr != &mac_restrictions->mac_list;
487 ptr = n, n = ptr->next) {
488 entry = list_entry(ptr, struct mac_entry, list);
489 list_del(ptr);
490 kfree(entry);
491 }
492 mac_restrictions->entries = 0;
493 spin_unlock_bh(&mac_restrictions->lock);
494 }
495
496
497 int ap_control_kick_mac(struct ap_data *ap, struct net_device *dev, u8 *mac)
498 {
499 struct sta_info *sta;
500 __le16 resp;
501
502 spin_lock_bh(&ap->sta_table_lock);
503 sta = ap_get_sta(ap, mac);
504 if (sta) {
505 ap_sta_hash_del(ap, sta);
506 list_del(&sta->list);
507 }
508 spin_unlock_bh(&ap->sta_table_lock);
509
510 if (!sta)
511 return -EINVAL;
512
513 resp = cpu_to_le16(WLAN_REASON_PREV_AUTH_NOT_VALID);
514 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_DEAUTH,
515 (char *) &resp, 2, sta->addr, 0);
516
517 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap)
518 hostap_event_expired_sta(dev, sta);
519
520 ap_free_sta(ap, sta);
521
522 return 0;
523 }
524
525 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
526
527
528 void ap_control_kickall(struct ap_data *ap)
529 {
530 struct list_head *ptr, *n;
531 struct sta_info *sta;
532
533 spin_lock_bh(&ap->sta_table_lock);
534 for (ptr = ap->sta_list.next, n = ptr->next; ptr != &ap->sta_list;
535 ptr = n, n = ptr->next) {
536 sta = list_entry(ptr, struct sta_info, list);
537 ap_sta_hash_del(ap, sta);
538 list_del(&sta->list);
539 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
540 hostap_event_expired_sta(sta->local->dev, sta);
541 ap_free_sta(ap, sta);
542 }
543 spin_unlock_bh(&ap->sta_table_lock);
544 }
545
546
547 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
548
549 static int prism2_ap_proc_show(struct seq_file *m, void *v)
550 {
551 struct sta_info *sta = v;
552 int i;
553
554 if (v == SEQ_START_TOKEN) {
555 seq_printf(m, "# BSSID CHAN SIGNAL NOISE RATE SSID FLAGS\n");
556 return 0;
557 }
558
559 if (!sta->ap)
560 return 0;
561
562 seq_printf(m, "%pM %d %d %d %d '",
563 sta->addr,
564 sta->u.ap.channel, sta->last_rx_signal,
565 sta->last_rx_silence, sta->last_rx_rate);
566
567 for (i = 0; i < sta->u.ap.ssid_len; i++) {
568 if (sta->u.ap.ssid[i] >= 32 && sta->u.ap.ssid[i] < 127)
569 seq_putc(m, sta->u.ap.ssid[i]);
570 else
571 seq_printf(m, "<%02x>", sta->u.ap.ssid[i]);
572 }
573
574 seq_putc(m, '\'');
575 if (sta->capability & WLAN_CAPABILITY_ESS)
576 seq_puts(m, " [ESS]");
577 if (sta->capability & WLAN_CAPABILITY_IBSS)
578 seq_puts(m, " [IBSS]");
579 if (sta->capability & WLAN_CAPABILITY_PRIVACY)
580 seq_puts(m, " [WEP]");
581 seq_putc(m, '\n');
582 return 0;
583 }
584
585 static void *prism2_ap_proc_start(struct seq_file *m, loff_t *_pos)
586 {
587 struct ap_data *ap = m->private;
588 spin_lock_bh(&ap->sta_table_lock);
589 return seq_list_start_head(&ap->sta_list, *_pos);
590 }
591
592 static void *prism2_ap_proc_next(struct seq_file *m, void *v, loff_t *_pos)
593 {
594 struct ap_data *ap = m->private;
595 return seq_list_next(v, &ap->sta_list, _pos);
596 }
597
598 static void prism2_ap_proc_stop(struct seq_file *m, void *v)
599 {
600 struct ap_data *ap = m->private;
601 spin_unlock_bh(&ap->sta_table_lock);
602 }
603
604 static const struct seq_operations prism2_ap_proc_seqops = {
605 .start = prism2_ap_proc_start,
606 .next = prism2_ap_proc_next,
607 .stop = prism2_ap_proc_stop,
608 .show = prism2_ap_proc_show,
609 };
610
611 static int prism2_ap_proc_open(struct inode *inode, struct file *file)
612 {
613 int ret = seq_open(file, &prism2_ap_proc_seqops);
614 if (ret == 0) {
615 struct seq_file *m = file->private_data;
616 m->private = PDE_DATA(inode);
617 }
618 return ret;
619 }
620
621 static const struct file_operations prism2_ap_proc_fops = {
622 .open = prism2_ap_proc_open,
623 .read = seq_read,
624 .llseek = seq_lseek,
625 .release = seq_release,
626 };
627 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
628
629
630 void hostap_check_sta_fw_version(struct ap_data *ap, int sta_fw_ver)
631 {
632 if (!ap)
633 return;
634
635 if (sta_fw_ver == PRISM2_FW_VER(0,8,0)) {
636 PDEBUG(DEBUG_AP, "Using data::nullfunc ACK workaround - "
637 "firmware upgrade recommended\n");
638 ap->nullfunc_ack = 1;
639 } else
640 ap->nullfunc_ack = 0;
641
642 if (sta_fw_ver == PRISM2_FW_VER(1,4,2)) {
643 printk(KERN_WARNING "%s: Warning: secondary station firmware "
644 "version 1.4.2 does not seem to work in Host AP mode\n",
645 ap->local->dev->name);
646 }
647 }
648
649
650 /* Called only as a tasklet (software IRQ) */
651 static void hostap_ap_tx_cb(struct sk_buff *skb, int ok, void *data)
652 {
653 struct ap_data *ap = data;
654 struct ieee80211_hdr *hdr;
655
656 if (!ap->local->hostapd || !ap->local->apdev) {
657 dev_kfree_skb(skb);
658 return;
659 }
660
661 /* Pass the TX callback frame to the hostapd; use 802.11 header version
662 * 1 to indicate failure (no ACK) and 2 success (frame ACKed) */
663
664 hdr = (struct ieee80211_hdr *) skb->data;
665 hdr->frame_control &= cpu_to_le16(~IEEE80211_FCTL_VERS);
666 hdr->frame_control |= cpu_to_le16(ok ? BIT(1) : BIT(0));
667
668 skb->dev = ap->local->apdev;
669 skb_pull(skb, hostap_80211_get_hdrlen(hdr->frame_control));
670 skb->pkt_type = PACKET_OTHERHOST;
671 skb->protocol = cpu_to_be16(ETH_P_802_2);
672 memset(skb->cb, 0, sizeof(skb->cb));
673 netif_rx(skb);
674 }
675
676
677 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
678 /* Called only as a tasklet (software IRQ) */
679 static void hostap_ap_tx_cb_auth(struct sk_buff *skb, int ok, void *data)
680 {
681 struct ap_data *ap = data;
682 struct net_device *dev = ap->local->dev;
683 struct ieee80211_hdr *hdr;
684 u16 auth_alg, auth_transaction, status;
685 __le16 *pos;
686 struct sta_info *sta = NULL;
687 char *txt = NULL;
688
689 if (ap->local->hostapd) {
690 dev_kfree_skb(skb);
691 return;
692 }
693
694 hdr = (struct ieee80211_hdr *) skb->data;
695 if (!ieee80211_is_auth(hdr->frame_control) ||
696 skb->len < IEEE80211_MGMT_HDR_LEN + 6) {
697 printk(KERN_DEBUG "%s: hostap_ap_tx_cb_auth received invalid "
698 "frame\n", dev->name);
699 dev_kfree_skb(skb);
700 return;
701 }
702
703 pos = (__le16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
704 auth_alg = le16_to_cpu(*pos++);
705 auth_transaction = le16_to_cpu(*pos++);
706 status = le16_to_cpu(*pos++);
707
708 if (!ok) {
709 txt = "frame was not ACKed";
710 goto done;
711 }
712
713 spin_lock(&ap->sta_table_lock);
714 sta = ap_get_sta(ap, hdr->addr1);
715 if (sta)
716 atomic_inc(&sta->users);
717 spin_unlock(&ap->sta_table_lock);
718
719 if (!sta) {
720 txt = "STA not found";
721 goto done;
722 }
723
724 if (status == WLAN_STATUS_SUCCESS &&
725 ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 2) ||
726 (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 4))) {
727 txt = "STA authenticated";
728 sta->flags |= WLAN_STA_AUTH;
729 sta->last_auth = jiffies;
730 } else if (status != WLAN_STATUS_SUCCESS)
731 txt = "authentication failed";
732
733 done:
734 if (sta)
735 atomic_dec(&sta->users);
736 if (txt) {
737 PDEBUG(DEBUG_AP, "%s: %pM auth_cb - alg=%d "
738 "trans#=%d status=%d - %s\n",
739 dev->name, hdr->addr1,
740 auth_alg, auth_transaction, status, txt);
741 }
742 dev_kfree_skb(skb);
743 }
744
745
746 /* Called only as a tasklet (software IRQ) */
747 static void hostap_ap_tx_cb_assoc(struct sk_buff *skb, int ok, void *data)
748 {
749 struct ap_data *ap = data;
750 struct net_device *dev = ap->local->dev;
751 struct ieee80211_hdr *hdr;
752 u16 status;
753 __le16 *pos;
754 struct sta_info *sta = NULL;
755 char *txt = NULL;
756
757 if (ap->local->hostapd) {
758 dev_kfree_skb(skb);
759 return;
760 }
761
762 hdr = (struct ieee80211_hdr *) skb->data;
763 if ((!ieee80211_is_assoc_resp(hdr->frame_control) &&
764 !ieee80211_is_reassoc_resp(hdr->frame_control)) ||
765 skb->len < IEEE80211_MGMT_HDR_LEN + 4) {
766 printk(KERN_DEBUG "%s: hostap_ap_tx_cb_assoc received invalid "
767 "frame\n", dev->name);
768 dev_kfree_skb(skb);
769 return;
770 }
771
772 if (!ok) {
773 txt = "frame was not ACKed";
774 goto done;
775 }
776
777 spin_lock(&ap->sta_table_lock);
778 sta = ap_get_sta(ap, hdr->addr1);
779 if (sta)
780 atomic_inc(&sta->users);
781 spin_unlock(&ap->sta_table_lock);
782
783 if (!sta) {
784 txt = "STA not found";
785 goto done;
786 }
787
788 pos = (__le16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
789 pos++;
790 status = le16_to_cpu(*pos++);
791 if (status == WLAN_STATUS_SUCCESS) {
792 if (!(sta->flags & WLAN_STA_ASSOC))
793 hostap_event_new_sta(dev, sta);
794 txt = "STA associated";
795 sta->flags |= WLAN_STA_ASSOC;
796 sta->last_assoc = jiffies;
797 } else
798 txt = "association failed";
799
800 done:
801 if (sta)
802 atomic_dec(&sta->users);
803 if (txt) {
804 PDEBUG(DEBUG_AP, "%s: %pM assoc_cb - %s\n",
805 dev->name, hdr->addr1, txt);
806 }
807 dev_kfree_skb(skb);
808 }
809
810 /* Called only as a tasklet (software IRQ); TX callback for poll frames used
811 * in verifying whether the STA is still present. */
812 static void hostap_ap_tx_cb_poll(struct sk_buff *skb, int ok, void *data)
813 {
814 struct ap_data *ap = data;
815 struct ieee80211_hdr *hdr;
816 struct sta_info *sta;
817
818 if (skb->len < 24)
819 goto fail;
820 hdr = (struct ieee80211_hdr *) skb->data;
821 if (ok) {
822 spin_lock(&ap->sta_table_lock);
823 sta = ap_get_sta(ap, hdr->addr1);
824 if (sta)
825 sta->flags &= ~WLAN_STA_PENDING_POLL;
826 spin_unlock(&ap->sta_table_lock);
827 } else {
828 PDEBUG(DEBUG_AP,
829 "%s: STA %pM did not ACK activity poll frame\n",
830 ap->local->dev->name, hdr->addr1);
831 }
832
833 fail:
834 dev_kfree_skb(skb);
835 }
836 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
837
838
839 void hostap_init_data(local_info_t *local)
840 {
841 struct ap_data *ap = local->ap;
842
843 if (ap == NULL) {
844 printk(KERN_WARNING "hostap_init_data: ap == NULL\n");
845 return;
846 }
847 memset(ap, 0, sizeof(struct ap_data));
848 ap->local = local;
849
850 ap->ap_policy = GET_INT_PARM(other_ap_policy, local->card_idx);
851 ap->bridge_packets = GET_INT_PARM(ap_bridge_packets, local->card_idx);
852 ap->max_inactivity =
853 GET_INT_PARM(ap_max_inactivity, local->card_idx) * HZ;
854 ap->autom_ap_wds = GET_INT_PARM(autom_ap_wds, local->card_idx);
855
856 spin_lock_init(&ap->sta_table_lock);
857 INIT_LIST_HEAD(&ap->sta_list);
858
859 /* Initialize task queue structure for AP management */
860 INIT_WORK(&local->ap->add_sta_proc_queue, handle_add_proc_queue);
861
862 ap->tx_callback_idx =
863 hostap_tx_callback_register(local, hostap_ap_tx_cb, ap);
864 if (ap->tx_callback_idx == 0)
865 printk(KERN_WARNING "%s: failed to register TX callback for "
866 "AP\n", local->dev->name);
867 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
868 INIT_WORK(&local->ap->wds_oper_queue, handle_wds_oper_queue);
869
870 ap->tx_callback_auth =
871 hostap_tx_callback_register(local, hostap_ap_tx_cb_auth, ap);
872 ap->tx_callback_assoc =
873 hostap_tx_callback_register(local, hostap_ap_tx_cb_assoc, ap);
874 ap->tx_callback_poll =
875 hostap_tx_callback_register(local, hostap_ap_tx_cb_poll, ap);
876 if (ap->tx_callback_auth == 0 || ap->tx_callback_assoc == 0 ||
877 ap->tx_callback_poll == 0)
878 printk(KERN_WARNING "%s: failed to register TX callback for "
879 "AP\n", local->dev->name);
880
881 spin_lock_init(&ap->mac_restrictions.lock);
882 INIT_LIST_HEAD(&ap->mac_restrictions.mac_list);
883 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
884
885 ap->initialized = 1;
886 }
887
888
889 void hostap_init_ap_proc(local_info_t *local)
890 {
891 struct ap_data *ap = local->ap;
892
893 ap->proc = local->proc;
894 if (ap->proc == NULL)
895 return;
896
897 #ifndef PRISM2_NO_PROCFS_DEBUG
898 proc_create_data("ap_debug", 0, ap->proc, &ap_debug_proc_fops, ap);
899 #endif /* PRISM2_NO_PROCFS_DEBUG */
900
901 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
902 proc_create_data("ap_control", 0, ap->proc, &ap_control_proc_fops, ap);
903 proc_create_data("ap", 0, ap->proc, &prism2_ap_proc_fops, ap);
904 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
905
906 }
907
908
909 void hostap_free_data(struct ap_data *ap)
910 {
911 struct sta_info *n, *sta;
912
913 if (ap == NULL || !ap->initialized) {
914 printk(KERN_DEBUG "hostap_free_data: ap has not yet been "
915 "initialized - skip resource freeing\n");
916 return;
917 }
918
919 flush_work(&ap->add_sta_proc_queue);
920
921 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
922 flush_work(&ap->wds_oper_queue);
923 if (ap->crypt)
924 ap->crypt->deinit(ap->crypt_priv);
925 ap->crypt = ap->crypt_priv = NULL;
926 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
927
928 list_for_each_entry_safe(sta, n, &ap->sta_list, list) {
929 ap_sta_hash_del(ap, sta);
930 list_del(&sta->list);
931 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
932 hostap_event_expired_sta(sta->local->dev, sta);
933 ap_free_sta(ap, sta);
934 }
935
936 #ifndef PRISM2_NO_PROCFS_DEBUG
937 if (ap->proc != NULL) {
938 remove_proc_entry("ap_debug", ap->proc);
939 }
940 #endif /* PRISM2_NO_PROCFS_DEBUG */
941
942 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
943 if (ap->proc != NULL) {
944 remove_proc_entry("ap", ap->proc);
945 remove_proc_entry("ap_control", ap->proc);
946 }
947 ap_control_flush_macs(&ap->mac_restrictions);
948 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
949
950 ap->initialized = 0;
951 }
952
953
954 /* caller should have mutex for AP STA list handling */
955 static struct sta_info* ap_get_sta(struct ap_data *ap, u8 *sta)
956 {
957 struct sta_info *s;
958
959 s = ap->sta_hash[STA_HASH(sta)];
960 while (s != NULL && memcmp(s->addr, sta, ETH_ALEN) != 0)
961 s = s->hnext;
962 return s;
963 }
964
965
966 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
967
968 /* Called from timer handler and from scheduled AP queue handlers */
969 static void prism2_send_mgmt(struct net_device *dev,
970 u16 type_subtype, char *body,
971 int body_len, u8 *addr, u16 tx_cb_idx)
972 {
973 struct hostap_interface *iface;
974 local_info_t *local;
975 struct ieee80211_hdr *hdr;
976 u16 fc;
977 struct sk_buff *skb;
978 struct hostap_skb_tx_data *meta;
979 int hdrlen;
980
981 iface = netdev_priv(dev);
982 local = iface->local;
983 dev = local->dev; /* always use master radio device */
984 iface = netdev_priv(dev);
985
986 if (!(dev->flags & IFF_UP)) {
987 PDEBUG(DEBUG_AP, "%s: prism2_send_mgmt - device is not UP - "
988 "cannot send frame\n", dev->name);
989 return;
990 }
991
992 skb = dev_alloc_skb(sizeof(*hdr) + body_len);
993 if (skb == NULL) {
994 PDEBUG(DEBUG_AP, "%s: prism2_send_mgmt failed to allocate "
995 "skb\n", dev->name);
996 return;
997 }
998
999 fc = type_subtype;
1000 hdrlen = hostap_80211_get_hdrlen(cpu_to_le16(type_subtype));
1001 hdr = (struct ieee80211_hdr *) skb_put(skb, hdrlen);
1002 if (body)
1003 memcpy(skb_put(skb, body_len), body, body_len);
1004
1005 memset(hdr, 0, hdrlen);
1006
1007 /* FIX: ctrl::ack sending used special HFA384X_TX_CTRL_802_11
1008 * tx_control instead of using local->tx_control */
1009
1010
1011 memcpy(hdr->addr1, addr, ETH_ALEN); /* DA / RA */
1012 if (ieee80211_is_data(hdr->frame_control)) {
1013 fc |= IEEE80211_FCTL_FROMDS;
1014 memcpy(hdr->addr2, dev->dev_addr, ETH_ALEN); /* BSSID */
1015 memcpy(hdr->addr3, dev->dev_addr, ETH_ALEN); /* SA */
1016 } else if (ieee80211_is_ctl(hdr->frame_control)) {
1017 /* control:ACK does not have addr2 or addr3 */
1018 memset(hdr->addr2, 0, ETH_ALEN);
1019 memset(hdr->addr3, 0, ETH_ALEN);
1020 } else {
1021 memcpy(hdr->addr2, dev->dev_addr, ETH_ALEN); /* SA */
1022 memcpy(hdr->addr3, dev->dev_addr, ETH_ALEN); /* BSSID */
1023 }
1024
1025 hdr->frame_control = cpu_to_le16(fc);
1026
1027 meta = (struct hostap_skb_tx_data *) skb->cb;
1028 memset(meta, 0, sizeof(*meta));
1029 meta->magic = HOSTAP_SKB_TX_DATA_MAGIC;
1030 meta->iface = iface;
1031 meta->tx_cb_idx = tx_cb_idx;
1032
1033 skb->dev = dev;
1034 skb_reset_mac_header(skb);
1035 skb_reset_network_header(skb);
1036 dev_queue_xmit(skb);
1037 }
1038 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1039
1040
1041 static int prism2_sta_proc_show(struct seq_file *m, void *v)
1042 {
1043 struct sta_info *sta = m->private;
1044 int i;
1045
1046 /* FIX: possible race condition.. the STA data could have just expired,
1047 * but proc entry was still here so that the read could have started;
1048 * some locking should be done here.. */
1049
1050 seq_printf(m,
1051 "%s=%pM\nusers=%d\naid=%d\n"
1052 "flags=0x%04x%s%s%s%s%s%s%s\n"
1053 "capability=0x%02x\nlisten_interval=%d\nsupported_rates=",
1054 sta->ap ? "AP" : "STA",
1055 sta->addr, atomic_read(&sta->users), sta->aid,
1056 sta->flags,
1057 sta->flags & WLAN_STA_AUTH ? " AUTH" : "",
1058 sta->flags & WLAN_STA_ASSOC ? " ASSOC" : "",
1059 sta->flags & WLAN_STA_PS ? " PS" : "",
1060 sta->flags & WLAN_STA_TIM ? " TIM" : "",
1061 sta->flags & WLAN_STA_PERM ? " PERM" : "",
1062 sta->flags & WLAN_STA_AUTHORIZED ? " AUTHORIZED" : "",
1063 sta->flags & WLAN_STA_PENDING_POLL ? " POLL" : "",
1064 sta->capability, sta->listen_interval);
1065 /* supported_rates: 500 kbit/s units with msb ignored */
1066 for (i = 0; i < sizeof(sta->supported_rates); i++)
1067 if (sta->supported_rates[i] != 0)
1068 seq_printf(m, "%d%sMbps ",
1069 (sta->supported_rates[i] & 0x7f) / 2,
1070 sta->supported_rates[i] & 1 ? ".5" : "");
1071 seq_printf(m,
1072 "\njiffies=%lu\nlast_auth=%lu\nlast_assoc=%lu\n"
1073 "last_rx=%lu\nlast_tx=%lu\nrx_packets=%lu\n"
1074 "tx_packets=%lu\n"
1075 "rx_bytes=%lu\ntx_bytes=%lu\nbuffer_count=%d\n"
1076 "last_rx: silence=%d dBm signal=%d dBm rate=%d%s Mbps\n"
1077 "tx_rate=%d\ntx[1M]=%d\ntx[2M]=%d\ntx[5.5M]=%d\n"
1078 "tx[11M]=%d\n"
1079 "rx[1M]=%d\nrx[2M]=%d\nrx[5.5M]=%d\nrx[11M]=%d\n",
1080 jiffies, sta->last_auth, sta->last_assoc, sta->last_rx,
1081 sta->last_tx,
1082 sta->rx_packets, sta->tx_packets, sta->rx_bytes,
1083 sta->tx_bytes, skb_queue_len(&sta->tx_buf),
1084 sta->last_rx_silence,
1085 sta->last_rx_signal, sta->last_rx_rate / 10,
1086 sta->last_rx_rate % 10 ? ".5" : "",
1087 sta->tx_rate, sta->tx_count[0], sta->tx_count[1],
1088 sta->tx_count[2], sta->tx_count[3], sta->rx_count[0],
1089 sta->rx_count[1], sta->rx_count[2], sta->rx_count[3]);
1090 if (sta->crypt && sta->crypt->ops && sta->crypt->ops->print_stats)
1091 sta->crypt->ops->print_stats(m, sta->crypt->priv);
1092 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1093 if (sta->ap) {
1094 if (sta->u.ap.channel >= 0)
1095 seq_printf(m, "channel=%d\n", sta->u.ap.channel);
1096 seq_puts(m, "ssid=");
1097 for (i = 0; i < sta->u.ap.ssid_len; i++) {
1098 if (sta->u.ap.ssid[i] >= 32 && sta->u.ap.ssid[i] < 127)
1099 seq_putc(m, sta->u.ap.ssid[i]);
1100 else
1101 seq_printf(m, "<%02x>", sta->u.ap.ssid[i]);
1102 }
1103 seq_putc(m, '\n');
1104 }
1105 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1106
1107 return 0;
1108 }
1109
1110 static int prism2_sta_proc_open(struct inode *inode, struct file *file)
1111 {
1112 return single_open(file, prism2_sta_proc_show, PDE_DATA(inode));
1113 }
1114
1115 static const struct file_operations prism2_sta_proc_fops = {
1116 .open = prism2_sta_proc_open,
1117 .read = seq_read,
1118 .llseek = seq_lseek,
1119 .release = single_release,
1120 };
1121
1122 static void handle_add_proc_queue(struct work_struct *work)
1123 {
1124 struct ap_data *ap = container_of(work, struct ap_data,
1125 add_sta_proc_queue);
1126 struct sta_info *sta;
1127 char name[20];
1128 struct add_sta_proc_data *entry, *prev;
1129
1130 entry = ap->add_sta_proc_entries;
1131 ap->add_sta_proc_entries = NULL;
1132
1133 while (entry) {
1134 spin_lock_bh(&ap->sta_table_lock);
1135 sta = ap_get_sta(ap, entry->addr);
1136 if (sta)
1137 atomic_inc(&sta->users);
1138 spin_unlock_bh(&ap->sta_table_lock);
1139
1140 if (sta) {
1141 sprintf(name, "%pM", sta->addr);
1142 sta->proc = proc_create_data(
1143 name, 0, ap->proc,
1144 &prism2_sta_proc_fops, sta);
1145
1146 atomic_dec(&sta->users);
1147 }
1148
1149 prev = entry;
1150 entry = entry->next;
1151 kfree(prev);
1152 }
1153 }
1154
1155
1156 static struct sta_info * ap_add_sta(struct ap_data *ap, u8 *addr)
1157 {
1158 struct sta_info *sta;
1159
1160 sta = kzalloc(sizeof(struct sta_info), GFP_ATOMIC);
1161 if (sta == NULL) {
1162 PDEBUG(DEBUG_AP, "AP: kmalloc failed\n");
1163 return NULL;
1164 }
1165
1166 /* initialize STA info data */
1167 sta->local = ap->local;
1168 skb_queue_head_init(&sta->tx_buf);
1169 memcpy(sta->addr, addr, ETH_ALEN);
1170
1171 atomic_inc(&sta->users);
1172 spin_lock_bh(&ap->sta_table_lock);
1173 list_add(&sta->list, &ap->sta_list);
1174 ap->num_sta++;
1175 ap_sta_hash_add(ap, sta);
1176 spin_unlock_bh(&ap->sta_table_lock);
1177
1178 if (ap->proc) {
1179 struct add_sta_proc_data *entry;
1180 /* schedule a non-interrupt context process to add a procfs
1181 * entry for the STA since procfs code use GFP_KERNEL */
1182 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
1183 if (entry) {
1184 memcpy(entry->addr, sta->addr, ETH_ALEN);
1185 entry->next = ap->add_sta_proc_entries;
1186 ap->add_sta_proc_entries = entry;
1187 schedule_work(&ap->add_sta_proc_queue);
1188 } else
1189 printk(KERN_DEBUG "Failed to add STA proc data\n");
1190 }
1191
1192 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1193 init_timer(&sta->timer);
1194 sta->timer.expires = jiffies + ap->max_inactivity;
1195 sta->timer.data = (unsigned long) sta;
1196 sta->timer.function = ap_handle_timer;
1197 if (!ap->local->hostapd)
1198 add_timer(&sta->timer);
1199 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1200
1201 return sta;
1202 }
1203
1204
1205 static int ap_tx_rate_ok(int rateidx, struct sta_info *sta,
1206 local_info_t *local)
1207 {
1208 if (rateidx > sta->tx_max_rate ||
1209 !(sta->tx_supp_rates & (1 << rateidx)))
1210 return 0;
1211
1212 if (local->tx_rate_control != 0 &&
1213 !(local->tx_rate_control & (1 << rateidx)))
1214 return 0;
1215
1216 return 1;
1217 }
1218
1219
1220 static void prism2_check_tx_rates(struct sta_info *sta)
1221 {
1222 int i;
1223
1224 sta->tx_supp_rates = 0;
1225 for (i = 0; i < sizeof(sta->supported_rates); i++) {
1226 if ((sta->supported_rates[i] & 0x7f) == 2)
1227 sta->tx_supp_rates |= WLAN_RATE_1M;
1228 if ((sta->supported_rates[i] & 0x7f) == 4)
1229 sta->tx_supp_rates |= WLAN_RATE_2M;
1230 if ((sta->supported_rates[i] & 0x7f) == 11)
1231 sta->tx_supp_rates |= WLAN_RATE_5M5;
1232 if ((sta->supported_rates[i] & 0x7f) == 22)
1233 sta->tx_supp_rates |= WLAN_RATE_11M;
1234 }
1235 sta->tx_max_rate = sta->tx_rate = sta->tx_rate_idx = 0;
1236 if (sta->tx_supp_rates & WLAN_RATE_1M) {
1237 sta->tx_max_rate = 0;
1238 if (ap_tx_rate_ok(0, sta, sta->local)) {
1239 sta->tx_rate = 10;
1240 sta->tx_rate_idx = 0;
1241 }
1242 }
1243 if (sta->tx_supp_rates & WLAN_RATE_2M) {
1244 sta->tx_max_rate = 1;
1245 if (ap_tx_rate_ok(1, sta, sta->local)) {
1246 sta->tx_rate = 20;
1247 sta->tx_rate_idx = 1;
1248 }
1249 }
1250 if (sta->tx_supp_rates & WLAN_RATE_5M5) {
1251 sta->tx_max_rate = 2;
1252 if (ap_tx_rate_ok(2, sta, sta->local)) {
1253 sta->tx_rate = 55;
1254 sta->tx_rate_idx = 2;
1255 }
1256 }
1257 if (sta->tx_supp_rates & WLAN_RATE_11M) {
1258 sta->tx_max_rate = 3;
1259 if (ap_tx_rate_ok(3, sta, sta->local)) {
1260 sta->tx_rate = 110;
1261 sta->tx_rate_idx = 3;
1262 }
1263 }
1264 }
1265
1266
1267 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1268
1269 static void ap_crypt_init(struct ap_data *ap)
1270 {
1271 ap->crypt = lib80211_get_crypto_ops("WEP");
1272
1273 if (ap->crypt) {
1274 if (ap->crypt->init) {
1275 ap->crypt_priv = ap->crypt->init(0);
1276 if (ap->crypt_priv == NULL)
1277 ap->crypt = NULL;
1278 else {
1279 u8 key[WEP_KEY_LEN];
1280 get_random_bytes(key, WEP_KEY_LEN);
1281 ap->crypt->set_key(key, WEP_KEY_LEN, NULL,
1282 ap->crypt_priv);
1283 }
1284 }
1285 }
1286
1287 if (ap->crypt == NULL) {
1288 printk(KERN_WARNING "AP could not initialize WEP: load module "
1289 "lib80211_crypt_wep.ko\n");
1290 }
1291 }
1292
1293
1294 /* Generate challenge data for shared key authentication. IEEE 802.11 specifies
1295 * that WEP algorithm is used for generating challenge. This should be unique,
1296 * but otherwise there is not really need for randomness etc. Initialize WEP
1297 * with pseudo random key and then use increasing IV to get unique challenge
1298 * streams.
1299 *
1300 * Called only as a scheduled task for pending AP frames.
1301 */
1302 static char * ap_auth_make_challenge(struct ap_data *ap)
1303 {
1304 char *tmpbuf;
1305 struct sk_buff *skb;
1306
1307 if (ap->crypt == NULL) {
1308 ap_crypt_init(ap);
1309 if (ap->crypt == NULL)
1310 return NULL;
1311 }
1312
1313 tmpbuf = kmalloc(WLAN_AUTH_CHALLENGE_LEN, GFP_ATOMIC);
1314 if (tmpbuf == NULL) {
1315 PDEBUG(DEBUG_AP, "AP: kmalloc failed for challenge\n");
1316 return NULL;
1317 }
1318
1319 skb = dev_alloc_skb(WLAN_AUTH_CHALLENGE_LEN +
1320 ap->crypt->extra_mpdu_prefix_len +
1321 ap->crypt->extra_mpdu_postfix_len);
1322 if (skb == NULL) {
1323 kfree(tmpbuf);
1324 return NULL;
1325 }
1326
1327 skb_reserve(skb, ap->crypt->extra_mpdu_prefix_len);
1328 memset(skb_put(skb, WLAN_AUTH_CHALLENGE_LEN), 0,
1329 WLAN_AUTH_CHALLENGE_LEN);
1330 if (ap->crypt->encrypt_mpdu(skb, 0, ap->crypt_priv)) {
1331 dev_kfree_skb(skb);
1332 kfree(tmpbuf);
1333 return NULL;
1334 }
1335
1336 skb_copy_from_linear_data_offset(skb, ap->crypt->extra_mpdu_prefix_len,
1337 tmpbuf, WLAN_AUTH_CHALLENGE_LEN);
1338 dev_kfree_skb(skb);
1339
1340 return tmpbuf;
1341 }
1342
1343
1344 /* Called only as a scheduled task for pending AP frames. */
1345 static void handle_authen(local_info_t *local, struct sk_buff *skb,
1346 struct hostap_80211_rx_status *rx_stats)
1347 {
1348 struct net_device *dev = local->dev;
1349 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1350 size_t hdrlen;
1351 struct ap_data *ap = local->ap;
1352 char body[8 + WLAN_AUTH_CHALLENGE_LEN], *challenge = NULL;
1353 int len, olen;
1354 u16 auth_alg, auth_transaction, status_code;
1355 __le16 *pos;
1356 u16 resp = WLAN_STATUS_SUCCESS;
1357 struct sta_info *sta = NULL;
1358 struct lib80211_crypt_data *crypt;
1359 char *txt = "";
1360
1361 len = skb->len - IEEE80211_MGMT_HDR_LEN;
1362
1363 hdrlen = hostap_80211_get_hdrlen(hdr->frame_control);
1364
1365 if (len < 6) {
1366 PDEBUG(DEBUG_AP, "%s: handle_authen - too short payload "
1367 "(len=%d) from %pM\n", dev->name, len, hdr->addr2);
1368 return;
1369 }
1370
1371 spin_lock_bh(&local->ap->sta_table_lock);
1372 sta = ap_get_sta(local->ap, hdr->addr2);
1373 if (sta)
1374 atomic_inc(&sta->users);
1375 spin_unlock_bh(&local->ap->sta_table_lock);
1376
1377 if (sta && sta->crypt)
1378 crypt = sta->crypt;
1379 else {
1380 int idx = 0;
1381 if (skb->len >= hdrlen + 3)
1382 idx = skb->data[hdrlen + 3] >> 6;
1383 crypt = local->crypt_info.crypt[idx];
1384 }
1385
1386 pos = (__le16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
1387 auth_alg = __le16_to_cpu(*pos);
1388 pos++;
1389 auth_transaction = __le16_to_cpu(*pos);
1390 pos++;
1391 status_code = __le16_to_cpu(*pos);
1392 pos++;
1393
1394 if (memcmp(dev->dev_addr, hdr->addr2, ETH_ALEN) == 0 ||
1395 ap_control_mac_deny(&ap->mac_restrictions, hdr->addr2)) {
1396 txt = "authentication denied";
1397 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1398 goto fail;
1399 }
1400
1401 if (((local->auth_algs & PRISM2_AUTH_OPEN) &&
1402 auth_alg == WLAN_AUTH_OPEN) ||
1403 ((local->auth_algs & PRISM2_AUTH_SHARED_KEY) &&
1404 crypt && auth_alg == WLAN_AUTH_SHARED_KEY)) {
1405 } else {
1406 txt = "unsupported algorithm";
1407 resp = WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG;
1408 goto fail;
1409 }
1410
1411 if (len >= 8) {
1412 u8 *u = (u8 *) pos;
1413 if (*u == WLAN_EID_CHALLENGE) {
1414 if (*(u + 1) != WLAN_AUTH_CHALLENGE_LEN) {
1415 txt = "invalid challenge len";
1416 resp = WLAN_STATUS_CHALLENGE_FAIL;
1417 goto fail;
1418 }
1419 if (len - 8 < WLAN_AUTH_CHALLENGE_LEN) {
1420 txt = "challenge underflow";
1421 resp = WLAN_STATUS_CHALLENGE_FAIL;
1422 goto fail;
1423 }
1424 challenge = (char *) (u + 2);
1425 }
1426 }
1427
1428 if (sta && sta->ap) {
1429 if (time_after(jiffies, sta->u.ap.last_beacon +
1430 (10 * sta->listen_interval * HZ) / 1024)) {
1431 PDEBUG(DEBUG_AP, "%s: no beacons received for a while,"
1432 " assuming AP %pM is now STA\n",
1433 dev->name, sta->addr);
1434 sta->ap = 0;
1435 sta->flags = 0;
1436 sta->u.sta.challenge = NULL;
1437 } else {
1438 txt = "AP trying to authenticate?";
1439 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1440 goto fail;
1441 }
1442 }
1443
1444 if ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 1) ||
1445 (auth_alg == WLAN_AUTH_SHARED_KEY &&
1446 (auth_transaction == 1 ||
1447 (auth_transaction == 3 && sta != NULL &&
1448 sta->u.sta.challenge != NULL)))) {
1449 } else {
1450 txt = "unknown authentication transaction number";
1451 resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION;
1452 goto fail;
1453 }
1454
1455 if (sta == NULL) {
1456 txt = "new STA";
1457
1458 if (local->ap->num_sta >= MAX_STA_COUNT) {
1459 /* FIX: might try to remove some old STAs first? */
1460 txt = "no more room for new STAs";
1461 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1462 goto fail;
1463 }
1464
1465 sta = ap_add_sta(local->ap, hdr->addr2);
1466 if (sta == NULL) {
1467 txt = "ap_add_sta failed";
1468 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1469 goto fail;
1470 }
1471 }
1472
1473 switch (auth_alg) {
1474 case WLAN_AUTH_OPEN:
1475 txt = "authOK";
1476 /* IEEE 802.11 standard is not completely clear about
1477 * whether STA is considered authenticated after
1478 * authentication OK frame has been send or after it
1479 * has been ACKed. In order to reduce interoperability
1480 * issues, mark the STA authenticated before ACK. */
1481 sta->flags |= WLAN_STA_AUTH;
1482 break;
1483
1484 case WLAN_AUTH_SHARED_KEY:
1485 if (auth_transaction == 1) {
1486 if (sta->u.sta.challenge == NULL) {
1487 sta->u.sta.challenge =
1488 ap_auth_make_challenge(local->ap);
1489 if (sta->u.sta.challenge == NULL) {
1490 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1491 goto fail;
1492 }
1493 }
1494 } else {
1495 if (sta->u.sta.challenge == NULL ||
1496 challenge == NULL ||
1497 memcmp(sta->u.sta.challenge, challenge,
1498 WLAN_AUTH_CHALLENGE_LEN) != 0 ||
1499 !ieee80211_has_protected(hdr->frame_control)) {
1500 txt = "challenge response incorrect";
1501 resp = WLAN_STATUS_CHALLENGE_FAIL;
1502 goto fail;
1503 }
1504
1505 txt = "challenge OK - authOK";
1506 /* IEEE 802.11 standard is not completely clear about
1507 * whether STA is considered authenticated after
1508 * authentication OK frame has been send or after it
1509 * has been ACKed. In order to reduce interoperability
1510 * issues, mark the STA authenticated before ACK. */
1511 sta->flags |= WLAN_STA_AUTH;
1512 kfree(sta->u.sta.challenge);
1513 sta->u.sta.challenge = NULL;
1514 }
1515 break;
1516 }
1517
1518 fail:
1519 pos = (__le16 *) body;
1520 *pos = cpu_to_le16(auth_alg);
1521 pos++;
1522 *pos = cpu_to_le16(auth_transaction + 1);
1523 pos++;
1524 *pos = cpu_to_le16(resp); /* status_code */
1525 pos++;
1526 olen = 6;
1527
1528 if (resp == WLAN_STATUS_SUCCESS && sta != NULL &&
1529 sta->u.sta.challenge != NULL &&
1530 auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 1) {
1531 u8 *tmp = (u8 *) pos;
1532 *tmp++ = WLAN_EID_CHALLENGE;
1533 *tmp++ = WLAN_AUTH_CHALLENGE_LEN;
1534 pos++;
1535 memcpy(pos, sta->u.sta.challenge, WLAN_AUTH_CHALLENGE_LEN);
1536 olen += 2 + WLAN_AUTH_CHALLENGE_LEN;
1537 }
1538
1539 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_AUTH,
1540 body, olen, hdr->addr2, ap->tx_callback_auth);
1541
1542 if (sta) {
1543 sta->last_rx = jiffies;
1544 atomic_dec(&sta->users);
1545 }
1546
1547 if (resp) {
1548 PDEBUG(DEBUG_AP, "%s: %pM auth (alg=%d "
1549 "trans#=%d stat=%d len=%d fc=%04x) ==> %d (%s)\n",
1550 dev->name, hdr->addr2,
1551 auth_alg, auth_transaction, status_code, len,
1552 le16_to_cpu(hdr->frame_control), resp, txt);
1553 }
1554 }
1555
1556
1557 /* Called only as a scheduled task for pending AP frames. */
1558 static void handle_assoc(local_info_t *local, struct sk_buff *skb,
1559 struct hostap_80211_rx_status *rx_stats, int reassoc)
1560 {
1561 struct net_device *dev = local->dev;
1562 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1563 char body[12], *p, *lpos;
1564 int len, left;
1565 __le16 *pos;
1566 u16 resp = WLAN_STATUS_SUCCESS;
1567 struct sta_info *sta = NULL;
1568 int send_deauth = 0;
1569 char *txt = "";
1570 u8 prev_ap[ETH_ALEN];
1571
1572 left = len = skb->len - IEEE80211_MGMT_HDR_LEN;
1573
1574 if (len < (reassoc ? 10 : 4)) {
1575 PDEBUG(DEBUG_AP, "%s: handle_assoc - too short payload "
1576 "(len=%d, reassoc=%d) from %pM\n",
1577 dev->name, len, reassoc, hdr->addr2);
1578 return;
1579 }
1580
1581 spin_lock_bh(&local->ap->sta_table_lock);
1582 sta = ap_get_sta(local->ap, hdr->addr2);
1583 if (sta == NULL || (sta->flags & WLAN_STA_AUTH) == 0) {
1584 spin_unlock_bh(&local->ap->sta_table_lock);
1585 txt = "trying to associate before authentication";
1586 send_deauth = 1;
1587 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1588 sta = NULL; /* do not decrement sta->users */
1589 goto fail;
1590 }
1591 atomic_inc(&sta->users);
1592 spin_unlock_bh(&local->ap->sta_table_lock);
1593
1594 pos = (__le16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
1595 sta->capability = __le16_to_cpu(*pos);
1596 pos++; left -= 2;
1597 sta->listen_interval = __le16_to_cpu(*pos);
1598 pos++; left -= 2;
1599
1600 if (reassoc) {
1601 memcpy(prev_ap, pos, ETH_ALEN);
1602 pos++; pos++; pos++; left -= 6;
1603 } else
1604 memset(prev_ap, 0, ETH_ALEN);
1605
1606 if (left >= 2) {
1607 unsigned int ileft;
1608 unsigned char *u = (unsigned char *) pos;
1609
1610 if (*u == WLAN_EID_SSID) {
1611 u++; left--;
1612 ileft = *u;
1613 u++; left--;
1614
1615 if (ileft > left || ileft > MAX_SSID_LEN) {
1616 txt = "SSID overflow";
1617 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1618 goto fail;
1619 }
1620
1621 if (ileft != strlen(local->essid) ||
1622 memcmp(local->essid, u, ileft) != 0) {
1623 txt = "not our SSID";
1624 resp = WLAN_STATUS_ASSOC_DENIED_UNSPEC;
1625 goto fail;
1626 }
1627
1628 u += ileft;
1629 left -= ileft;
1630 }
1631
1632 if (left >= 2 && *u == WLAN_EID_SUPP_RATES) {
1633 u++; left--;
1634 ileft = *u;
1635 u++; left--;
1636
1637 if (ileft > left || ileft == 0 ||
1638 ileft > WLAN_SUPP_RATES_MAX) {
1639 txt = "SUPP_RATES len error";
1640 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1641 goto fail;
1642 }
1643
1644 memset(sta->supported_rates, 0,
1645 sizeof(sta->supported_rates));
1646 memcpy(sta->supported_rates, u, ileft);
1647 prism2_check_tx_rates(sta);
1648
1649 u += ileft;
1650 left -= ileft;
1651 }
1652
1653 if (left > 0) {
1654 PDEBUG(DEBUG_AP, "%s: assoc from %pM"
1655 " with extra data (%d bytes) [",
1656 dev->name, hdr->addr2, left);
1657 while (left > 0) {
1658 PDEBUG2(DEBUG_AP, "<%02x>", *u);
1659 u++; left--;
1660 }
1661 PDEBUG2(DEBUG_AP, "]\n");
1662 }
1663 } else {
1664 txt = "frame underflow";
1665 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1666 goto fail;
1667 }
1668
1669 /* get a unique AID */
1670 if (sta->aid > 0)
1671 txt = "OK, old AID";
1672 else {
1673 spin_lock_bh(&local->ap->sta_table_lock);
1674 for (sta->aid = 1; sta->aid <= MAX_AID_TABLE_SIZE; sta->aid++)
1675 if (local->ap->sta_aid[sta->aid - 1] == NULL)
1676 break;
1677 if (sta->aid > MAX_AID_TABLE_SIZE) {
1678 sta->aid = 0;
1679 spin_unlock_bh(&local->ap->sta_table_lock);
1680 resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
1681 txt = "no room for more AIDs";
1682 } else {
1683 local->ap->sta_aid[sta->aid - 1] = sta;
1684 spin_unlock_bh(&local->ap->sta_table_lock);
1685 txt = "OK, new AID";
1686 }
1687 }
1688
1689 fail:
1690 pos = (__le16 *) body;
1691
1692 if (send_deauth) {
1693 *pos = cpu_to_le16(WLAN_REASON_STA_REQ_ASSOC_WITHOUT_AUTH);
1694 pos++;
1695 } else {
1696 /* FIX: CF-Pollable and CF-PollReq should be set to match the
1697 * values in beacons/probe responses */
1698 /* FIX: how about privacy and WEP? */
1699 /* capability */
1700 *pos = cpu_to_le16(WLAN_CAPABILITY_ESS);
1701 pos++;
1702
1703 /* status_code */
1704 *pos = cpu_to_le16(resp);
1705 pos++;
1706
1707 *pos = cpu_to_le16((sta && sta->aid > 0 ? sta->aid : 0) |
1708 BIT(14) | BIT(15)); /* AID */
1709 pos++;
1710
1711 /* Supported rates (Information element) */
1712 p = (char *) pos;
1713 *p++ = WLAN_EID_SUPP_RATES;
1714 lpos = p;
1715 *p++ = 0; /* len */
1716 if (local->tx_rate_control & WLAN_RATE_1M) {
1717 *p++ = local->basic_rates & WLAN_RATE_1M ? 0x82 : 0x02;
1718 (*lpos)++;
1719 }
1720 if (local->tx_rate_control & WLAN_RATE_2M) {
1721 *p++ = local->basic_rates & WLAN_RATE_2M ? 0x84 : 0x04;
1722 (*lpos)++;
1723 }
1724 if (local->tx_rate_control & WLAN_RATE_5M5) {
1725 *p++ = local->basic_rates & WLAN_RATE_5M5 ?
1726 0x8b : 0x0b;
1727 (*lpos)++;
1728 }
1729 if (local->tx_rate_control & WLAN_RATE_11M) {
1730 *p++ = local->basic_rates & WLAN_RATE_11M ?
1731 0x96 : 0x16;
1732 (*lpos)++;
1733 }
1734 pos = (__le16 *) p;
1735 }
1736
1737 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT |
1738 (send_deauth ? IEEE80211_STYPE_DEAUTH :
1739 (reassoc ? IEEE80211_STYPE_REASSOC_RESP :
1740 IEEE80211_STYPE_ASSOC_RESP)),
1741 body, (u8 *) pos - (u8 *) body,
1742 hdr->addr2,
1743 send_deauth ? 0 : local->ap->tx_callback_assoc);
1744
1745 if (sta) {
1746 if (resp == WLAN_STATUS_SUCCESS) {
1747 sta->last_rx = jiffies;
1748 /* STA will be marked associated from TX callback, if
1749 * AssocResp is ACKed */
1750 }
1751 atomic_dec(&sta->users);
1752 }
1753
1754 #if 0
1755 PDEBUG(DEBUG_AP, "%s: %pM %sassoc (len=%d "
1756 "prev_ap=%pM) => %d(%d) (%s)\n",
1757 dev->name,
1758 hdr->addr2,
1759 reassoc ? "re" : "", len,
1760 prev_ap,
1761 resp, send_deauth, txt);
1762 #endif
1763 }
1764
1765
1766 /* Called only as a scheduled task for pending AP frames. */
1767 static void handle_deauth(local_info_t *local, struct sk_buff *skb,
1768 struct hostap_80211_rx_status *rx_stats)
1769 {
1770 struct net_device *dev = local->dev;
1771 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1772 char *body = (char *) (skb->data + IEEE80211_MGMT_HDR_LEN);
1773 int len;
1774 u16 reason_code;
1775 __le16 *pos;
1776 struct sta_info *sta = NULL;
1777
1778 len = skb->len - IEEE80211_MGMT_HDR_LEN;
1779
1780 if (len < 2) {
1781 printk("handle_deauth - too short payload (len=%d)\n", len);
1782 return;
1783 }
1784
1785 pos = (__le16 *) body;
1786 reason_code = le16_to_cpu(*pos);
1787
1788 PDEBUG(DEBUG_AP, "%s: deauthentication: %pM len=%d, "
1789 "reason_code=%d\n", dev->name, hdr->addr2,
1790 len, reason_code);
1791
1792 spin_lock_bh(&local->ap->sta_table_lock);
1793 sta = ap_get_sta(local->ap, hdr->addr2);
1794 if (sta != NULL) {
1795 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap)
1796 hostap_event_expired_sta(local->dev, sta);
1797 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
1798 }
1799 spin_unlock_bh(&local->ap->sta_table_lock);
1800 if (sta == NULL) {
1801 printk("%s: deauthentication from %pM, "
1802 "reason_code=%d, but STA not authenticated\n", dev->name,
1803 hdr->addr2, reason_code);
1804 }
1805 }
1806
1807
1808 /* Called only as a scheduled task for pending AP frames. */
1809 static void handle_disassoc(local_info_t *local, struct sk_buff *skb,
1810 struct hostap_80211_rx_status *rx_stats)
1811 {
1812 struct net_device *dev = local->dev;
1813 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1814 char *body = skb->data + IEEE80211_MGMT_HDR_LEN;
1815 int len;
1816 u16 reason_code;
1817 __le16 *pos;
1818 struct sta_info *sta = NULL;
1819
1820 len = skb->len - IEEE80211_MGMT_HDR_LEN;
1821
1822 if (len < 2) {
1823 printk("handle_disassoc - too short payload (len=%d)\n", len);
1824 return;
1825 }
1826
1827 pos = (__le16 *) body;
1828 reason_code = le16_to_cpu(*pos);
1829
1830 PDEBUG(DEBUG_AP, "%s: disassociation: %pM len=%d, "
1831 "reason_code=%d\n", dev->name, hdr->addr2,
1832 len, reason_code);
1833
1834 spin_lock_bh(&local->ap->sta_table_lock);
1835 sta = ap_get_sta(local->ap, hdr->addr2);
1836 if (sta != NULL) {
1837 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap)
1838 hostap_event_expired_sta(local->dev, sta);
1839 sta->flags &= ~WLAN_STA_ASSOC;
1840 }
1841 spin_unlock_bh(&local->ap->sta_table_lock);
1842 if (sta == NULL) {
1843 printk("%s: disassociation from %pM, "
1844 "reason_code=%d, but STA not authenticated\n",
1845 dev->name, hdr->addr2, reason_code);
1846 }
1847 }
1848
1849
1850 /* Called only as a scheduled task for pending AP frames. */
1851 static void ap_handle_data_nullfunc(local_info_t *local,
1852 struct ieee80211_hdr *hdr)
1853 {
1854 struct net_device *dev = local->dev;
1855
1856 /* some STA f/w's seem to require control::ACK frame for
1857 * data::nullfunc, but at least Prism2 station f/w version 0.8.0 does
1858 * not send this..
1859 * send control::ACK for the data::nullfunc */
1860
1861 printk(KERN_DEBUG "Sending control::ACK for data::nullfunc\n");
1862 prism2_send_mgmt(dev, IEEE80211_FTYPE_CTL | IEEE80211_STYPE_ACK,
1863 NULL, 0, hdr->addr2, 0);
1864 }
1865
1866
1867 /* Called only as a scheduled task for pending AP frames. */
1868 static void ap_handle_dropped_data(local_info_t *local,
1869 struct ieee80211_hdr *hdr)
1870 {
1871 struct net_device *dev = local->dev;
1872 struct sta_info *sta;
1873 __le16 reason;
1874
1875 spin_lock_bh(&local->ap->sta_table_lock);
1876 sta = ap_get_sta(local->ap, hdr->addr2);
1877 if (sta)
1878 atomic_inc(&sta->users);
1879 spin_unlock_bh(&local->ap->sta_table_lock);
1880
1881 if (sta != NULL && (sta->flags & WLAN_STA_ASSOC)) {
1882 PDEBUG(DEBUG_AP, "ap_handle_dropped_data: STA is now okay?\n");
1883 atomic_dec(&sta->users);
1884 return;
1885 }
1886
1887 reason = cpu_to_le16(WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
1888 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT |
1889 ((sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) ?
1890 IEEE80211_STYPE_DEAUTH : IEEE80211_STYPE_DISASSOC),
1891 (char *) &reason, sizeof(reason), hdr->addr2, 0);
1892
1893 if (sta)
1894 atomic_dec(&sta->users);
1895 }
1896
1897 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1898
1899
1900 /* Called only as a scheduled task for pending AP frames. */
1901 static void pspoll_send_buffered(local_info_t *local, struct sta_info *sta,
1902 struct sk_buff *skb)
1903 {
1904 struct hostap_skb_tx_data *meta;
1905
1906 if (!(sta->flags & WLAN_STA_PS)) {
1907 /* Station has moved to non-PS mode, so send all buffered
1908 * frames using normal device queue. */
1909 dev_queue_xmit(skb);
1910 return;
1911 }
1912
1913 /* add a flag for hostap_handle_sta_tx() to know that this skb should
1914 * be passed through even though STA is using PS */
1915 meta = (struct hostap_skb_tx_data *) skb->cb;
1916 meta->flags |= HOSTAP_TX_FLAGS_BUFFERED_FRAME;
1917 if (!skb_queue_empty(&sta->tx_buf)) {
1918 /* indicate to STA that more frames follow */
1919 meta->flags |= HOSTAP_TX_FLAGS_ADD_MOREDATA;
1920 }
1921 dev_queue_xmit(skb);
1922 }
1923
1924
1925 /* Called only as a scheduled task for pending AP frames. */
1926 static void handle_pspoll(local_info_t *local,
1927 struct ieee80211_hdr *hdr,
1928 struct hostap_80211_rx_status *rx_stats)
1929 {
1930 struct net_device *dev = local->dev;
1931 struct sta_info *sta;
1932 u16 aid;
1933 struct sk_buff *skb;
1934
1935 PDEBUG(DEBUG_PS2, "handle_pspoll: BSSID=%pM, TA=%pM PWRMGT=%d\n",
1936 hdr->addr1, hdr->addr2, !!ieee80211_has_pm(hdr->frame_control));
1937
1938 if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN)) {
1939 PDEBUG(DEBUG_AP,
1940 "handle_pspoll - addr1(BSSID)=%pM not own MAC\n",
1941 hdr->addr1);
1942 return;
1943 }
1944
1945 aid = le16_to_cpu(hdr->duration_id);
1946 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) {
1947 PDEBUG(DEBUG_PS, " PSPOLL and AID[15:14] not set\n");
1948 return;
1949 }
1950 aid &= ~(BIT(15) | BIT(14));
1951 if (aid == 0 || aid > MAX_AID_TABLE_SIZE) {
1952 PDEBUG(DEBUG_PS, " invalid aid=%d\n", aid);
1953 return;
1954 }
1955 PDEBUG(DEBUG_PS2, " aid=%d\n", aid);
1956
1957 spin_lock_bh(&local->ap->sta_table_lock);
1958 sta = ap_get_sta(local->ap, hdr->addr2);
1959 if (sta)
1960 atomic_inc(&sta->users);
1961 spin_unlock_bh(&local->ap->sta_table_lock);
1962
1963 if (sta == NULL) {
1964 PDEBUG(DEBUG_PS, " STA not found\n");
1965 return;
1966 }
1967 if (sta->aid != aid) {
1968 PDEBUG(DEBUG_PS, " received aid=%i does not match with "
1969 "assoc.aid=%d\n", aid, sta->aid);
1970 return;
1971 }
1972
1973 /* FIX: todo:
1974 * - add timeout for buffering (clear aid in TIM vector if buffer timed
1975 * out (expiry time must be longer than ListenInterval for
1976 * the corresponding STA; "8802-11: 11.2.1.9 AP aging function"
1977 * - what to do, if buffered, pspolled, and sent frame is not ACKed by
1978 * sta; store buffer for later use and leave TIM aid bit set? use
1979 * TX event to check whether frame was ACKed?
1980 */
1981
1982 while ((skb = skb_dequeue(&sta->tx_buf)) != NULL) {
1983 /* send buffered frame .. */
1984 PDEBUG(DEBUG_PS2, "Sending buffered frame to STA after PS POLL"
1985 " (buffer_count=%d)\n", skb_queue_len(&sta->tx_buf));
1986
1987 pspoll_send_buffered(local, sta, skb);
1988
1989 if (sta->flags & WLAN_STA_PS) {
1990 /* send only one buffered packet per PS Poll */
1991 /* FIX: should ignore further PS Polls until the
1992 * buffered packet that was just sent is acknowledged
1993 * (Tx or TxExc event) */
1994 break;
1995 }
1996 }
1997
1998 if (skb_queue_empty(&sta->tx_buf)) {
1999 /* try to clear aid from TIM */
2000 if (!(sta->flags & WLAN_STA_TIM))
2001 PDEBUG(DEBUG_PS2, "Re-unsetting TIM for aid %d\n",
2002 aid);
2003 hostap_set_tim(local, aid, 0);
2004 sta->flags &= ~WLAN_STA_TIM;
2005 }
2006
2007 atomic_dec(&sta->users);
2008 }
2009
2010
2011 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2012
2013 static void handle_wds_oper_queue(struct work_struct *work)
2014 {
2015 struct ap_data *ap = container_of(work, struct ap_data,
2016 wds_oper_queue);
2017 local_info_t *local = ap->local;
2018 struct wds_oper_data *entry, *prev;
2019
2020 spin_lock_bh(&local->lock);
2021 entry = local->ap->wds_oper_entries;
2022 local->ap->wds_oper_entries = NULL;
2023 spin_unlock_bh(&local->lock);
2024
2025 while (entry) {
2026 PDEBUG(DEBUG_AP, "%s: %s automatic WDS connection "
2027 "to AP %pM\n",
2028 local->dev->name,
2029 entry->type == WDS_ADD ? "adding" : "removing",
2030 entry->addr);
2031 if (entry->type == WDS_ADD)
2032 prism2_wds_add(local, entry->addr, 0);
2033 else if (entry->type == WDS_DEL)
2034 prism2_wds_del(local, entry->addr, 0, 1);
2035
2036 prev = entry;
2037 entry = entry->next;
2038 kfree(prev);
2039 }
2040 }
2041
2042
2043 /* Called only as a scheduled task for pending AP frames. */
2044 static void handle_beacon(local_info_t *local, struct sk_buff *skb,
2045 struct hostap_80211_rx_status *rx_stats)
2046 {
2047 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
2048 char *body = skb->data + IEEE80211_MGMT_HDR_LEN;
2049 int len, left;
2050 u16 beacon_int, capability;
2051 __le16 *pos;
2052 char *ssid = NULL;
2053 unsigned char *supp_rates = NULL;
2054 int ssid_len = 0, supp_rates_len = 0;
2055 struct sta_info *sta = NULL;
2056 int new_sta = 0, channel = -1;
2057
2058 len = skb->len - IEEE80211_MGMT_HDR_LEN;
2059
2060 if (len < 8 + 2 + 2) {
2061 printk(KERN_DEBUG "handle_beacon - too short payload "
2062 "(len=%d)\n", len);
2063 return;
2064 }
2065
2066 pos = (__le16 *) body;
2067 left = len;
2068
2069 /* Timestamp (8 octets) */
2070 pos += 4; left -= 8;
2071 /* Beacon interval (2 octets) */
2072 beacon_int = le16_to_cpu(*pos);
2073 pos++; left -= 2;
2074 /* Capability information (2 octets) */
2075 capability = le16_to_cpu(*pos);
2076 pos++; left -= 2;
2077
2078 if (local->ap->ap_policy != AP_OTHER_AP_EVEN_IBSS &&
2079 capability & WLAN_CAPABILITY_IBSS)
2080 return;
2081
2082 if (left >= 2) {
2083 unsigned int ileft;
2084 unsigned char *u = (unsigned char *) pos;
2085
2086 if (*u == WLAN_EID_SSID) {
2087 u++; left--;
2088 ileft = *u;
2089 u++; left--;
2090
2091 if (ileft > left || ileft > MAX_SSID_LEN) {
2092 PDEBUG(DEBUG_AP, "SSID: overflow\n");
2093 return;
2094 }
2095
2096 if (local->ap->ap_policy == AP_OTHER_AP_SAME_SSID &&
2097 (ileft != strlen(local->essid) ||
2098 memcmp(local->essid, u, ileft) != 0)) {
2099 /* not our SSID */
2100 return;
2101 }
2102
2103 ssid = u;
2104 ssid_len = ileft;
2105
2106 u += ileft;
2107 left -= ileft;
2108 }
2109
2110 if (*u == WLAN_EID_SUPP_RATES) {
2111 u++; left--;
2112 ileft = *u;
2113 u++; left--;
2114
2115 if (ileft > left || ileft == 0 || ileft > 8) {
2116 PDEBUG(DEBUG_AP, " - SUPP_RATES len error\n");
2117 return;
2118 }
2119
2120 supp_rates = u;
2121 supp_rates_len = ileft;
2122
2123 u += ileft;
2124 left -= ileft;
2125 }
2126
2127 if (*u == WLAN_EID_DS_PARAMS) {
2128 u++; left--;
2129 ileft = *u;
2130 u++; left--;
2131
2132 if (ileft > left || ileft != 1) {
2133 PDEBUG(DEBUG_AP, " - DS_PARAMS len error\n");
2134 return;
2135 }
2136
2137 channel = *u;
2138
2139 u += ileft;
2140 left -= ileft;
2141 }
2142 }
2143
2144 spin_lock_bh(&local->ap->sta_table_lock);
2145 sta = ap_get_sta(local->ap, hdr->addr2);
2146 if (sta != NULL)
2147 atomic_inc(&sta->users);
2148 spin_unlock_bh(&local->ap->sta_table_lock);
2149
2150 if (sta == NULL) {
2151 /* add new AP */
2152 new_sta = 1;
2153 sta = ap_add_sta(local->ap, hdr->addr2);
2154 if (sta == NULL) {
2155 printk(KERN_INFO "prism2: kmalloc failed for AP "
2156 "data structure\n");
2157 return;
2158 }
2159 hostap_event_new_sta(local->dev, sta);
2160
2161 /* mark APs authentication and associated for pseudo ad-hoc
2162 * style communication */
2163 sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
2164
2165 if (local->ap->autom_ap_wds) {
2166 hostap_wds_link_oper(local, sta->addr, WDS_ADD);
2167 }
2168 }
2169
2170 sta->ap = 1;
2171 if (ssid) {
2172 sta->u.ap.ssid_len = ssid_len;
2173 memcpy(sta->u.ap.ssid, ssid, ssid_len);
2174 sta->u.ap.ssid[ssid_len] = '\0';
2175 } else {
2176 sta->u.ap.ssid_len = 0;
2177 sta->u.ap.ssid[0] = '\0';
2178 }
2179 sta->u.ap.channel = channel;
2180 sta->rx_packets++;
2181 sta->rx_bytes += len;
2182 sta->u.ap.last_beacon = sta->last_rx = jiffies;
2183 sta->capability = capability;
2184 sta->listen_interval = beacon_int;
2185
2186 atomic_dec(&sta->users);
2187
2188 if (new_sta) {
2189 memset(sta->supported_rates, 0, sizeof(sta->supported_rates));
2190 memcpy(sta->supported_rates, supp_rates, supp_rates_len);
2191 prism2_check_tx_rates(sta);
2192 }
2193 }
2194
2195 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2196
2197
2198 /* Called only as a tasklet. */
2199 static void handle_ap_item(local_info_t *local, struct sk_buff *skb,
2200 struct hostap_80211_rx_status *rx_stats)
2201 {
2202 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2203 struct net_device *dev = local->dev;
2204 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2205 u16 fc, type, stype;
2206 struct ieee80211_hdr *hdr;
2207
2208 /* FIX: should give skb->len to handler functions and check that the
2209 * buffer is long enough */
2210 hdr = (struct ieee80211_hdr *) skb->data;
2211 fc = le16_to_cpu(hdr->frame_control);
2212 type = fc & IEEE80211_FCTL_FTYPE;
2213 stype = fc & IEEE80211_FCTL_STYPE;
2214
2215 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2216 if (!local->hostapd && type == IEEE80211_FTYPE_DATA) {
2217 PDEBUG(DEBUG_AP, "handle_ap_item - data frame\n");
2218
2219 if (!(fc & IEEE80211_FCTL_TODS) ||
2220 (fc & IEEE80211_FCTL_FROMDS)) {
2221 if (stype == IEEE80211_STYPE_NULLFUNC) {
2222 /* no ToDS nullfunc seems to be used to check
2223 * AP association; so send reject message to
2224 * speed up re-association */
2225 ap_handle_dropped_data(local, hdr);
2226 goto done;
2227 }
2228 PDEBUG(DEBUG_AP, " not ToDS frame (fc=0x%04x)\n",
2229 fc);
2230 goto done;
2231 }
2232
2233 if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN)) {
2234 PDEBUG(DEBUG_AP, "handle_ap_item - addr1(BSSID)=%pM"
2235 " not own MAC\n", hdr->addr1);
2236 goto done;
2237 }
2238
2239 if (local->ap->nullfunc_ack &&
2240 stype == IEEE80211_STYPE_NULLFUNC)
2241 ap_handle_data_nullfunc(local, hdr);
2242 else
2243 ap_handle_dropped_data(local, hdr);
2244 goto done;
2245 }
2246
2247 if (type == IEEE80211_FTYPE_MGMT && stype == IEEE80211_STYPE_BEACON) {
2248 handle_beacon(local, skb, rx_stats);
2249 goto done;
2250 }
2251 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2252
2253 if (type == IEEE80211_FTYPE_CTL && stype == IEEE80211_STYPE_PSPOLL) {
2254 handle_pspoll(local, hdr, rx_stats);
2255 goto done;
2256 }
2257
2258 if (local->hostapd) {
2259 PDEBUG(DEBUG_AP, "Unknown frame in AP queue: type=0x%02x "
2260 "subtype=0x%02x\n", type, stype);
2261 goto done;
2262 }
2263
2264 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2265 if (type != IEEE80211_FTYPE_MGMT) {
2266 PDEBUG(DEBUG_AP, "handle_ap_item - not a management frame?\n");
2267 goto done;
2268 }
2269
2270 if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN)) {
2271 PDEBUG(DEBUG_AP, "handle_ap_item - addr1(DA)=%pM"
2272 " not own MAC\n", hdr->addr1);
2273 goto done;
2274 }
2275
2276 if (memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN)) {
2277 PDEBUG(DEBUG_AP, "handle_ap_item - addr3(BSSID)=%pM"
2278 " not own MAC\n", hdr->addr3);
2279 goto done;
2280 }
2281
2282 switch (stype) {
2283 case IEEE80211_STYPE_ASSOC_REQ:
2284 handle_assoc(local, skb, rx_stats, 0);
2285 break;
2286 case IEEE80211_STYPE_ASSOC_RESP:
2287 PDEBUG(DEBUG_AP, "==> ASSOC RESP (ignored)\n");
2288 break;
2289 case IEEE80211_STYPE_REASSOC_REQ:
2290 handle_assoc(local, skb, rx_stats, 1);
2291 break;
2292 case IEEE80211_STYPE_REASSOC_RESP:
2293 PDEBUG(DEBUG_AP, "==> REASSOC RESP (ignored)\n");
2294 break;
2295 case IEEE80211_STYPE_ATIM:
2296 PDEBUG(DEBUG_AP, "==> ATIM (ignored)\n");
2297 break;
2298 case IEEE80211_STYPE_DISASSOC:
2299 handle_disassoc(local, skb, rx_stats);
2300 break;
2301 case IEEE80211_STYPE_AUTH:
2302 handle_authen(local, skb, rx_stats);
2303 break;
2304 case IEEE80211_STYPE_DEAUTH:
2305 handle_deauth(local, skb, rx_stats);
2306 break;
2307 default:
2308 PDEBUG(DEBUG_AP, "Unknown mgmt frame subtype 0x%02x\n",
2309 stype >> 4);
2310 break;
2311 }
2312 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2313
2314 done:
2315 dev_kfree_skb(skb);
2316 }
2317
2318
2319 /* Called only as a tasklet (software IRQ) */
2320 void hostap_rx(struct net_device *dev, struct sk_buff *skb,
2321 struct hostap_80211_rx_status *rx_stats)
2322 {
2323 struct hostap_interface *iface;
2324 local_info_t *local;
2325 struct ieee80211_hdr *hdr;
2326
2327 iface = netdev_priv(dev);
2328 local = iface->local;
2329
2330 if (skb->len < 16)
2331 goto drop;
2332
2333 dev->stats.rx_packets++;
2334
2335 hdr = (struct ieee80211_hdr *) skb->data;
2336
2337 if (local->ap->ap_policy == AP_OTHER_AP_SKIP_ALL &&
2338 ieee80211_is_beacon(hdr->frame_control))
2339 goto drop;
2340
2341 skb->protocol = cpu_to_be16(ETH_P_HOSTAP);
2342 handle_ap_item(local, skb, rx_stats);
2343 return;
2344
2345 drop:
2346 dev_kfree_skb(skb);
2347 }
2348
2349
2350 /* Called only as a tasklet (software IRQ) */
2351 static void schedule_packet_send(local_info_t *local, struct sta_info *sta)
2352 {
2353 struct sk_buff *skb;
2354 struct ieee80211_hdr *hdr;
2355 struct hostap_80211_rx_status rx_stats;
2356
2357 if (skb_queue_empty(&sta->tx_buf))
2358 return;
2359
2360 skb = dev_alloc_skb(16);
2361 if (skb == NULL) {
2362 printk(KERN_DEBUG "%s: schedule_packet_send: skb alloc "
2363 "failed\n", local->dev->name);
2364 return;
2365 }
2366
2367 hdr = (struct ieee80211_hdr *) skb_put(skb, 16);
2368
2369 /* Generate a fake pspoll frame to start packet delivery */
2370 hdr->frame_control = cpu_to_le16(
2371 IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL);
2372 memcpy(hdr->addr1, local->dev->dev_addr, ETH_ALEN);
2373 memcpy(hdr->addr2, sta->addr, ETH_ALEN);
2374 hdr->duration_id = cpu_to_le16(sta->aid | BIT(15) | BIT(14));
2375
2376 PDEBUG(DEBUG_PS2,
2377 "%s: Scheduling buffered packet delivery for STA %pM\n",
2378 local->dev->name, sta->addr);
2379
2380 skb->dev = local->dev;
2381
2382 memset(&rx_stats, 0, sizeof(rx_stats));
2383 hostap_rx(local->dev, skb, &rx_stats);
2384 }
2385
2386
2387 int prism2_ap_get_sta_qual(local_info_t *local, struct sockaddr addr[],
2388 struct iw_quality qual[], int buf_size,
2389 int aplist)
2390 {
2391 struct ap_data *ap = local->ap;
2392 struct list_head *ptr;
2393 int count = 0;
2394
2395 spin_lock_bh(&ap->sta_table_lock);
2396
2397 for (ptr = ap->sta_list.next; ptr != NULL && ptr != &ap->sta_list;
2398 ptr = ptr->next) {
2399 struct sta_info *sta = (struct sta_info *) ptr;
2400
2401 if (aplist && !sta->ap)
2402 continue;
2403 addr[count].sa_family = ARPHRD_ETHER;
2404 memcpy(addr[count].sa_data, sta->addr, ETH_ALEN);
2405 if (sta->last_rx_silence == 0)
2406 qual[count].qual = sta->last_rx_signal < 27 ?
2407 0 : (sta->last_rx_signal - 27) * 92 / 127;
2408 else
2409 qual[count].qual = sta->last_rx_signal -
2410 sta->last_rx_silence - 35;
2411 qual[count].level = HFA384X_LEVEL_TO_dBm(sta->last_rx_signal);
2412 qual[count].noise = HFA384X_LEVEL_TO_dBm(sta->last_rx_silence);
2413 qual[count].updated = sta->last_rx_updated;
2414
2415 sta->last_rx_updated = IW_QUAL_DBM;
2416
2417 count++;
2418 if (count >= buf_size)
2419 break;
2420 }
2421 spin_unlock_bh(&ap->sta_table_lock);
2422
2423 return count;
2424 }
2425
2426
2427 /* Translate our list of Access Points & Stations to a card independent
2428 * format that the Wireless Tools will understand - Jean II */
2429 int prism2_ap_translate_scan(struct net_device *dev,
2430 struct iw_request_info *info, char *buffer)
2431 {
2432 struct hostap_interface *iface;
2433 local_info_t *local;
2434 struct ap_data *ap;
2435 struct list_head *ptr;
2436 struct iw_event iwe;
2437 char *current_ev = buffer;
2438 char *end_buf = buffer + IW_SCAN_MAX_DATA;
2439 #if !defined(PRISM2_NO_KERNEL_IEEE80211_MGMT)
2440 char buf[64];
2441 #endif
2442
2443 iface = netdev_priv(dev);
2444 local = iface->local;
2445 ap = local->ap;
2446
2447 spin_lock_bh(&ap->sta_table_lock);
2448
2449 for (ptr = ap->sta_list.next; ptr != NULL && ptr != &ap->sta_list;
2450 ptr = ptr->next) {
2451 struct sta_info *sta = (struct sta_info *) ptr;
2452
2453 /* First entry *MUST* be the AP MAC address */
2454 memset(&iwe, 0, sizeof(iwe));
2455 iwe.cmd = SIOCGIWAP;
2456 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
2457 memcpy(iwe.u.ap_addr.sa_data, sta->addr, ETH_ALEN);
2458 iwe.len = IW_EV_ADDR_LEN;
2459 current_ev = iwe_stream_add_event(info, current_ev, end_buf,
2460 &iwe, IW_EV_ADDR_LEN);
2461
2462 /* Use the mode to indicate if it's a station or
2463 * an Access Point */
2464 memset(&iwe, 0, sizeof(iwe));
2465 iwe.cmd = SIOCGIWMODE;
2466 if (sta->ap)
2467 iwe.u.mode = IW_MODE_MASTER;
2468 else
2469 iwe.u.mode = IW_MODE_INFRA;
2470 iwe.len = IW_EV_UINT_LEN;
2471 current_ev = iwe_stream_add_event(info, current_ev, end_buf,
2472 &iwe, IW_EV_UINT_LEN);
2473
2474 /* Some quality */
2475 memset(&iwe, 0, sizeof(iwe));
2476 iwe.cmd = IWEVQUAL;
2477 if (sta->last_rx_silence == 0)
2478 iwe.u.qual.qual = sta->last_rx_signal < 27 ?
2479 0 : (sta->last_rx_signal - 27) * 92 / 127;
2480 else
2481 iwe.u.qual.qual = sta->last_rx_signal -
2482 sta->last_rx_silence - 35;
2483 iwe.u.qual.level = HFA384X_LEVEL_TO_dBm(sta->last_rx_signal);
2484 iwe.u.qual.noise = HFA384X_LEVEL_TO_dBm(sta->last_rx_silence);
2485 iwe.u.qual.updated = sta->last_rx_updated;
2486 iwe.len = IW_EV_QUAL_LEN;
2487 current_ev = iwe_stream_add_event(info, current_ev, end_buf,
2488 &iwe, IW_EV_QUAL_LEN);
2489
2490 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2491 if (sta->ap) {
2492 memset(&iwe, 0, sizeof(iwe));
2493 iwe.cmd = SIOCGIWESSID;
2494 iwe.u.data.length = sta->u.ap.ssid_len;
2495 iwe.u.data.flags = 1;
2496 current_ev = iwe_stream_add_point(info, current_ev,
2497 end_buf, &iwe,
2498 sta->u.ap.ssid);
2499
2500 memset(&iwe, 0, sizeof(iwe));
2501 iwe.cmd = SIOCGIWENCODE;
2502 if (sta->capability & WLAN_CAPABILITY_PRIVACY)
2503 iwe.u.data.flags =
2504 IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
2505 else
2506 iwe.u.data.flags = IW_ENCODE_DISABLED;
2507 current_ev = iwe_stream_add_point(info, current_ev,
2508 end_buf, &iwe,
2509 sta->u.ap.ssid);
2510
2511 if (sta->u.ap.channel > 0 &&
2512 sta->u.ap.channel <= FREQ_COUNT) {
2513 memset(&iwe, 0, sizeof(iwe));
2514 iwe.cmd = SIOCGIWFREQ;
2515 iwe.u.freq.m = freq_list[sta->u.ap.channel - 1]
2516 * 100000;
2517 iwe.u.freq.e = 1;
2518 current_ev = iwe_stream_add_event(
2519 info, current_ev, end_buf, &iwe,
2520 IW_EV_FREQ_LEN);
2521 }
2522
2523 memset(&iwe, 0, sizeof(iwe));
2524 iwe.cmd = IWEVCUSTOM;
2525 sprintf(buf, "beacon_interval=%d",
2526 sta->listen_interval);
2527 iwe.u.data.length = strlen(buf);
2528 current_ev = iwe_stream_add_point(info, current_ev,
2529 end_buf, &iwe, buf);
2530 }
2531 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2532
2533 sta->last_rx_updated = IW_QUAL_DBM;
2534
2535 /* To be continued, we should make good use of IWEVCUSTOM */
2536 }
2537
2538 spin_unlock_bh(&ap->sta_table_lock);
2539
2540 return current_ev - buffer;
2541 }
2542
2543
2544 static int prism2_hostapd_add_sta(struct ap_data *ap,
2545 struct prism2_hostapd_param *param)
2546 {
2547 struct sta_info *sta;
2548
2549 spin_lock_bh(&ap->sta_table_lock);
2550 sta = ap_get_sta(ap, param->sta_addr);
2551 if (sta)
2552 atomic_inc(&sta->users);
2553 spin_unlock_bh(&ap->sta_table_lock);
2554
2555 if (sta == NULL) {
2556 sta = ap_add_sta(ap, param->sta_addr);
2557 if (sta == NULL)
2558 return -1;
2559 }
2560
2561 if (!(sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
2562 hostap_event_new_sta(sta->local->dev, sta);
2563
2564 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC;
2565 sta->last_rx = jiffies;
2566 sta->aid = param->u.add_sta.aid;
2567 sta->capability = param->u.add_sta.capability;
2568 sta->tx_supp_rates = param->u.add_sta.tx_supp_rates;
2569 if (sta->tx_supp_rates & WLAN_RATE_1M)
2570 sta->supported_rates[0] = 2;
2571 if (sta->tx_supp_rates & WLAN_RATE_2M)
2572 sta->supported_rates[1] = 4;
2573 if (sta->tx_supp_rates & WLAN_RATE_5M5)
2574 sta->supported_rates[2] = 11;
2575 if (sta->tx_supp_rates & WLAN_RATE_11M)
2576 sta->supported_rates[3] = 22;
2577 prism2_check_tx_rates(sta);
2578 atomic_dec(&sta->users);
2579 return 0;
2580 }
2581
2582
2583 static int prism2_hostapd_remove_sta(struct ap_data *ap,
2584 struct prism2_hostapd_param *param)
2585 {
2586 struct sta_info *sta;
2587
2588 spin_lock_bh(&ap->sta_table_lock);
2589 sta = ap_get_sta(ap, param->sta_addr);
2590 if (sta) {
2591 ap_sta_hash_del(ap, sta);
2592 list_del(&sta->list);
2593 }
2594 spin_unlock_bh(&ap->sta_table_lock);
2595
2596 if (!sta)
2597 return -ENOENT;
2598
2599 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
2600 hostap_event_expired_sta(sta->local->dev, sta);
2601 ap_free_sta(ap, sta);
2602
2603 return 0;
2604 }
2605
2606
2607 static int prism2_hostapd_get_info_sta(struct ap_data *ap,
2608 struct prism2_hostapd_param *param)
2609 {
2610 struct sta_info *sta;
2611
2612 spin_lock_bh(&ap->sta_table_lock);
2613 sta = ap_get_sta(ap, param->sta_addr);
2614 if (sta)
2615 atomic_inc(&sta->users);
2616 spin_unlock_bh(&ap->sta_table_lock);
2617
2618 if (!sta)
2619 return -ENOENT;
2620
2621 param->u.get_info_sta.inactive_sec = (jiffies - sta->last_rx) / HZ;
2622
2623 atomic_dec(&sta->users);
2624
2625 return 1;
2626 }
2627
2628
2629 static int prism2_hostapd_set_flags_sta(struct ap_data *ap,
2630 struct prism2_hostapd_param *param)
2631 {
2632 struct sta_info *sta;
2633
2634 spin_lock_bh(&ap->sta_table_lock);
2635 sta = ap_get_sta(ap, param->sta_addr);
2636 if (sta) {
2637 sta->flags |= param->u.set_flags_sta.flags_or;
2638 sta->flags &= param->u.set_flags_sta.flags_and;
2639 }
2640 spin_unlock_bh(&ap->sta_table_lock);
2641
2642 if (!sta)
2643 return -ENOENT;
2644
2645 return 0;
2646 }
2647
2648
2649 static int prism2_hostapd_sta_clear_stats(struct ap_data *ap,
2650 struct prism2_hostapd_param *param)
2651 {
2652 struct sta_info *sta;
2653 int rate;
2654
2655 spin_lock_bh(&ap->sta_table_lock);
2656 sta = ap_get_sta(ap, param->sta_addr);
2657 if (sta) {
2658 sta->rx_packets = sta->tx_packets = 0;
2659 sta->rx_bytes = sta->tx_bytes = 0;
2660 for (rate = 0; rate < WLAN_RATE_COUNT; rate++) {
2661 sta->tx_count[rate] = 0;
2662 sta->rx_count[rate] = 0;
2663 }
2664 }
2665 spin_unlock_bh(&ap->sta_table_lock);
2666
2667 if (!sta)
2668 return -ENOENT;
2669
2670 return 0;
2671 }
2672
2673
2674 int prism2_hostapd(struct ap_data *ap, struct prism2_hostapd_param *param)
2675 {
2676 switch (param->cmd) {
2677 case PRISM2_HOSTAPD_FLUSH:
2678 ap_control_kickall(ap);
2679 return 0;
2680 case PRISM2_HOSTAPD_ADD_STA:
2681 return prism2_hostapd_add_sta(ap, param);
2682 case PRISM2_HOSTAPD_REMOVE_STA:
2683 return prism2_hostapd_remove_sta(ap, param);
2684 case PRISM2_HOSTAPD_GET_INFO_STA:
2685 return prism2_hostapd_get_info_sta(ap, param);
2686 case PRISM2_HOSTAPD_SET_FLAGS_STA:
2687 return prism2_hostapd_set_flags_sta(ap, param);
2688 case PRISM2_HOSTAPD_STA_CLEAR_STATS:
2689 return prism2_hostapd_sta_clear_stats(ap, param);
2690 default:
2691 printk(KERN_WARNING "prism2_hostapd: unknown cmd=%d\n",
2692 param->cmd);
2693 return -EOPNOTSUPP;
2694 }
2695 }
2696
2697
2698 /* Update station info for host-based TX rate control and return current
2699 * TX rate */
2700 static int ap_update_sta_tx_rate(struct sta_info *sta, struct net_device *dev)
2701 {
2702 int ret = sta->tx_rate;
2703 struct hostap_interface *iface;
2704 local_info_t *local;
2705
2706 iface = netdev_priv(dev);
2707 local = iface->local;
2708
2709 sta->tx_count[sta->tx_rate_idx]++;
2710 sta->tx_since_last_failure++;
2711 sta->tx_consecutive_exc = 0;
2712 if (sta->tx_since_last_failure >= WLAN_RATE_UPDATE_COUNT &&
2713 sta->tx_rate_idx < sta->tx_max_rate) {
2714 /* use next higher rate */
2715 int old_rate, new_rate;
2716 old_rate = new_rate = sta->tx_rate_idx;
2717 while (new_rate < sta->tx_max_rate) {
2718 new_rate++;
2719 if (ap_tx_rate_ok(new_rate, sta, local)) {
2720 sta->tx_rate_idx = new_rate;
2721 break;
2722 }
2723 }
2724 if (old_rate != sta->tx_rate_idx) {
2725 switch (sta->tx_rate_idx) {
2726 case 0: sta->tx_rate = 10; break;
2727 case 1: sta->tx_rate = 20; break;
2728 case 2: sta->tx_rate = 55; break;
2729 case 3: sta->tx_rate = 110; break;
2730 default: sta->tx_rate = 0; break;
2731 }
2732 PDEBUG(DEBUG_AP, "%s: STA %pM TX rate raised to %d\n",
2733 dev->name, sta->addr, sta->tx_rate);
2734 }
2735 sta->tx_since_last_failure = 0;
2736 }
2737
2738 return ret;
2739 }
2740
2741
2742 /* Called only from software IRQ. Called for each TX frame prior possible
2743 * encryption and transmit. */
2744 ap_tx_ret hostap_handle_sta_tx(local_info_t *local, struct hostap_tx_data *tx)
2745 {
2746 struct sta_info *sta = NULL;
2747 struct sk_buff *skb = tx->skb;
2748 int set_tim, ret;
2749 struct ieee80211_hdr *hdr;
2750 struct hostap_skb_tx_data *meta;
2751
2752 meta = (struct hostap_skb_tx_data *) skb->cb;
2753 ret = AP_TX_CONTINUE;
2754 if (local->ap == NULL || skb->len < 10 ||
2755 meta->iface->type == HOSTAP_INTERFACE_STA)
2756 goto out;
2757
2758 hdr = (struct ieee80211_hdr *) skb->data;
2759
2760 if (hdr->addr1[0] & 0x01) {
2761 /* broadcast/multicast frame - no AP related processing */
2762 if (local->ap->num_sta <= 0)
2763 ret = AP_TX_DROP;
2764 goto out;
2765 }
2766
2767 /* unicast packet - check whether destination STA is associated */
2768 spin_lock(&local->ap->sta_table_lock);
2769 sta = ap_get_sta(local->ap, hdr->addr1);
2770 if (sta)
2771 atomic_inc(&sta->users);
2772 spin_unlock(&local->ap->sta_table_lock);
2773
2774 if (local->iw_mode == IW_MODE_MASTER && sta == NULL &&
2775 !(meta->flags & HOSTAP_TX_FLAGS_WDS) &&
2776 meta->iface->type != HOSTAP_INTERFACE_MASTER &&
2777 meta->iface->type != HOSTAP_INTERFACE_AP) {
2778 #if 0
2779 /* This can happen, e.g., when wlan0 is added to a bridge and
2780 * bridging code does not know which port is the correct target
2781 * for a unicast frame. In this case, the packet is send to all
2782 * ports of the bridge. Since this is a valid scenario, do not
2783 * print out any errors here. */
2784 if (net_ratelimit()) {
2785 printk(KERN_DEBUG "AP: drop packet to non-associated "
2786 "STA %pM\n", hdr->addr1);
2787 }
2788 #endif
2789 local->ap->tx_drop_nonassoc++;
2790 ret = AP_TX_DROP;
2791 goto out;
2792 }
2793
2794 if (sta == NULL)
2795 goto out;
2796
2797 if (!(sta->flags & WLAN_STA_AUTHORIZED))
2798 ret = AP_TX_CONTINUE_NOT_AUTHORIZED;
2799
2800 /* Set tx_rate if using host-based TX rate control */
2801 if (!local->fw_tx_rate_control)
2802 local->ap->last_tx_rate = meta->rate =
2803 ap_update_sta_tx_rate(sta, local->dev);
2804
2805 if (local->iw_mode != IW_MODE_MASTER)
2806 goto out;
2807
2808 if (!(sta->flags & WLAN_STA_PS))
2809 goto out;
2810
2811 if (meta->flags & HOSTAP_TX_FLAGS_ADD_MOREDATA) {
2812 /* indicate to STA that more frames follow */
2813 hdr->frame_control |=
2814 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
2815 }
2816
2817 if (meta->flags & HOSTAP_TX_FLAGS_BUFFERED_FRAME) {
2818 /* packet was already buffered and now send due to
2819 * PS poll, so do not rebuffer it */
2820 goto out;
2821 }
2822
2823 if (skb_queue_len(&sta->tx_buf) >= STA_MAX_TX_BUFFER) {
2824 PDEBUG(DEBUG_PS, "%s: No more space in STA (%pM)'s"
2825 "PS mode buffer\n",
2826 local->dev->name, sta->addr);
2827 /* Make sure that TIM is set for the station (it might not be
2828 * after AP wlan hw reset). */
2829 /* FIX: should fix hw reset to restore bits based on STA
2830 * buffer state.. */
2831 hostap_set_tim(local, sta->aid, 1);
2832 sta->flags |= WLAN_STA_TIM;
2833 ret = AP_TX_DROP;
2834 goto out;
2835 }
2836
2837 /* STA in PS mode, buffer frame for later delivery */
2838 set_tim = skb_queue_empty(&sta->tx_buf);
2839 skb_queue_tail(&sta->tx_buf, skb);
2840 /* FIX: could save RX time to skb and expire buffered frames after
2841 * some time if STA does not poll for them */
2842
2843 if (set_tim) {
2844 if (sta->flags & WLAN_STA_TIM)
2845 PDEBUG(DEBUG_PS2, "Re-setting TIM for aid %d\n",
2846 sta->aid);
2847 hostap_set_tim(local, sta->aid, 1);
2848 sta->flags |= WLAN_STA_TIM;
2849 }
2850
2851 ret = AP_TX_BUFFERED;
2852
2853 out:
2854 if (sta != NULL) {
2855 if (ret == AP_TX_CONTINUE ||
2856 ret == AP_TX_CONTINUE_NOT_AUTHORIZED) {
2857 sta->tx_packets++;
2858 sta->tx_bytes += skb->len;
2859 sta->last_tx = jiffies;
2860 }
2861
2862 if ((ret == AP_TX_CONTINUE ||
2863 ret == AP_TX_CONTINUE_NOT_AUTHORIZED) &&
2864 sta->crypt && tx->host_encrypt) {
2865 tx->crypt = sta->crypt;
2866 tx->sta_ptr = sta; /* hostap_handle_sta_release() will
2867 * be called to release sta info
2868 * later */
2869 } else
2870 atomic_dec(&sta->users);
2871 }
2872
2873 return ret;
2874 }
2875
2876
2877 void hostap_handle_sta_release(void *ptr)
2878 {
2879 struct sta_info *sta = ptr;
2880 atomic_dec(&sta->users);
2881 }
2882
2883
2884 /* Called only as a tasklet (software IRQ) */
2885 void hostap_handle_sta_tx_exc(local_info_t *local, struct sk_buff *skb)
2886 {
2887 struct sta_info *sta;
2888 struct ieee80211_hdr *hdr;
2889 struct hostap_skb_tx_data *meta;
2890
2891 hdr = (struct ieee80211_hdr *) skb->data;
2892 meta = (struct hostap_skb_tx_data *) skb->cb;
2893
2894 spin_lock(&local->ap->sta_table_lock);
2895 sta = ap_get_sta(local->ap, hdr->addr1);
2896 if (!sta) {
2897 spin_unlock(&local->ap->sta_table_lock);
2898 PDEBUG(DEBUG_AP, "%s: Could not find STA %pM"
2899 " for this TX error (@%lu)\n",
2900 local->dev->name, hdr->addr1, jiffies);
2901 return;
2902 }
2903
2904 sta->tx_since_last_failure = 0;
2905 sta->tx_consecutive_exc++;
2906
2907 if (sta->tx_consecutive_exc >= WLAN_RATE_DECREASE_THRESHOLD &&
2908 sta->tx_rate_idx > 0 && meta->rate <= sta->tx_rate) {
2909 /* use next lower rate */
2910 int old, rate;
2911 old = rate = sta->tx_rate_idx;
2912 while (rate > 0) {
2913 rate--;
2914 if (ap_tx_rate_ok(rate, sta, local)) {
2915 sta->tx_rate_idx = rate;
2916 break;
2917 }
2918 }
2919 if (old != sta->tx_rate_idx) {
2920 switch (sta->tx_rate_idx) {
2921 case 0: sta->tx_rate = 10; break;
2922 case 1: sta->tx_rate = 20; break;
2923 case 2: sta->tx_rate = 55; break;
2924 case 3: sta->tx_rate = 110; break;
2925 default: sta->tx_rate = 0; break;
2926 }
2927 PDEBUG(DEBUG_AP,
2928 "%s: STA %pM TX rate lowered to %d\n",
2929 local->dev->name, sta->addr, sta->tx_rate);
2930 }
2931 sta->tx_consecutive_exc = 0;
2932 }
2933 spin_unlock(&local->ap->sta_table_lock);
2934 }
2935
2936
2937 static void hostap_update_sta_ps2(local_info_t *local, struct sta_info *sta,
2938 int pwrmgt, int type, int stype)
2939 {
2940 if (pwrmgt && !(sta->flags & WLAN_STA_PS)) {
2941 sta->flags |= WLAN_STA_PS;
2942 PDEBUG(DEBUG_PS2, "STA %pM changed to use PS "
2943 "mode (type=0x%02X, stype=0x%02X)\n",
2944 sta->addr, type >> 2, stype >> 4);
2945 } else if (!pwrmgt && (sta->flags & WLAN_STA_PS)) {
2946 sta->flags &= ~WLAN_STA_PS;
2947 PDEBUG(DEBUG_PS2, "STA %pM changed to not use "
2948 "PS mode (type=0x%02X, stype=0x%02X)\n",
2949 sta->addr, type >> 2, stype >> 4);
2950 if (type != IEEE80211_FTYPE_CTL ||
2951 stype != IEEE80211_STYPE_PSPOLL)
2952 schedule_packet_send(local, sta);
2953 }
2954 }
2955
2956
2957 /* Called only as a tasklet (software IRQ). Called for each RX frame to update
2958 * STA power saving state. pwrmgt is a flag from 802.11 frame_control field. */
2959 int hostap_update_sta_ps(local_info_t *local, struct ieee80211_hdr *hdr)
2960 {
2961 struct sta_info *sta;
2962 u16 fc;
2963
2964 spin_lock(&local->ap->sta_table_lock);
2965 sta = ap_get_sta(local->ap, hdr->addr2);
2966 if (sta)
2967 atomic_inc(&sta->users);
2968 spin_unlock(&local->ap->sta_table_lock);
2969
2970 if (!sta)
2971 return -1;
2972
2973 fc = le16_to_cpu(hdr->frame_control);
2974 hostap_update_sta_ps2(local, sta, fc & IEEE80211_FCTL_PM,
2975 fc & IEEE80211_FCTL_FTYPE,
2976 fc & IEEE80211_FCTL_STYPE);
2977
2978 atomic_dec(&sta->users);
2979 return 0;
2980 }
2981
2982
2983 /* Called only as a tasklet (software IRQ). Called for each RX frame after
2984 * getting RX header and payload from hardware. */
2985 ap_rx_ret hostap_handle_sta_rx(local_info_t *local, struct net_device *dev,
2986 struct sk_buff *skb,
2987 struct hostap_80211_rx_status *rx_stats,
2988 int wds)
2989 {
2990 int ret;
2991 struct sta_info *sta;
2992 u16 fc, type, stype;
2993 struct ieee80211_hdr *hdr;
2994
2995 if (local->ap == NULL)
2996 return AP_RX_CONTINUE;
2997
2998 hdr = (struct ieee80211_hdr *) skb->data;
2999
3000 fc = le16_to_cpu(hdr->frame_control);
3001 type = fc & IEEE80211_FCTL_FTYPE;
3002 stype = fc & IEEE80211_FCTL_STYPE;
3003
3004 spin_lock(&local->ap->sta_table_lock);
3005 sta = ap_get_sta(local->ap, hdr->addr2);
3006 if (sta)
3007 atomic_inc(&sta->users);
3008 spin_unlock(&local->ap->sta_table_lock);
3009
3010 if (sta && !(sta->flags & WLAN_STA_AUTHORIZED))
3011 ret = AP_RX_CONTINUE_NOT_AUTHORIZED;
3012 else
3013 ret = AP_RX_CONTINUE;
3014
3015
3016 if (fc & IEEE80211_FCTL_TODS) {
3017 if (!wds && (sta == NULL || !(sta->flags & WLAN_STA_ASSOC))) {
3018 if (local->hostapd) {
3019 prism2_rx_80211(local->apdev, skb, rx_stats,
3020 PRISM2_RX_NON_ASSOC);
3021 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
3022 } else {
3023 printk(KERN_DEBUG "%s: dropped received packet"
3024 " from non-associated STA %pM"
3025 " (type=0x%02x, subtype=0x%02x)\n",
3026 dev->name, hdr->addr2,
3027 type >> 2, stype >> 4);
3028 hostap_rx(dev, skb, rx_stats);
3029 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
3030 }
3031 ret = AP_RX_EXIT;
3032 goto out;
3033 }
3034 } else if (fc & IEEE80211_FCTL_FROMDS) {
3035 if (!wds) {
3036 /* FromDS frame - not for us; probably
3037 * broadcast/multicast in another BSS - drop */
3038 if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
3039 printk(KERN_DEBUG "Odd.. FromDS packet "
3040 "received with own BSSID\n");
3041 hostap_dump_rx_80211(dev->name, skb, rx_stats);
3042 }
3043 ret = AP_RX_DROP;
3044 goto out;
3045 }
3046 } else if (stype == IEEE80211_STYPE_NULLFUNC && sta == NULL &&
3047 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
3048
3049 if (local->hostapd) {
3050 prism2_rx_80211(local->apdev, skb, rx_stats,
3051 PRISM2_RX_NON_ASSOC);
3052 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
3053 } else {
3054 /* At least Lucent f/w seems to send data::nullfunc
3055 * frames with no ToDS flag when the current AP returns
3056 * after being unavailable for some time. Speed up
3057 * re-association by informing the station about it not
3058 * being associated. */
3059 printk(KERN_DEBUG "%s: rejected received nullfunc frame"
3060 " without ToDS from not associated STA %pM\n",
3061 dev->name, hdr->addr2);
3062 hostap_rx(dev, skb, rx_stats);
3063 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
3064 }
3065 ret = AP_RX_EXIT;
3066 goto out;
3067 } else if (stype == IEEE80211_STYPE_NULLFUNC) {
3068 /* At least Lucent cards seem to send periodic nullfunc
3069 * frames with ToDS. Let these through to update SQ
3070 * stats and PS state. Nullfunc frames do not contain
3071 * any data and they will be dropped below. */
3072 } else {
3073 /* If BSSID (Addr3) is foreign, this frame is a normal
3074 * broadcast frame from an IBSS network. Drop it silently.
3075 * If BSSID is own, report the dropping of this frame. */
3076 if (memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
3077 printk(KERN_DEBUG "%s: dropped received packet from %pM"
3078 " with no ToDS flag "
3079 "(type=0x%02x, subtype=0x%02x)\n", dev->name,
3080 hdr->addr2, type >> 2, stype >> 4);
3081 hostap_dump_rx_80211(dev->name, skb, rx_stats);
3082 }
3083 ret = AP_RX_DROP;
3084 goto out;
3085 }
3086
3087 if (sta) {
3088 hostap_update_sta_ps2(local, sta, fc & IEEE80211_FCTL_PM,
3089 type, stype);
3090
3091 sta->rx_packets++;
3092 sta->rx_bytes += skb->len;
3093 sta->last_rx = jiffies;
3094 }
3095
3096 if (local->ap->nullfunc_ack && stype == IEEE80211_STYPE_NULLFUNC &&
3097 fc & IEEE80211_FCTL_TODS) {
3098 if (local->hostapd) {
3099 prism2_rx_80211(local->apdev, skb, rx_stats,
3100 PRISM2_RX_NULLFUNC_ACK);
3101 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
3102 } else {
3103 /* some STA f/w's seem to require control::ACK frame
3104 * for data::nullfunc, but Prism2 f/w 0.8.0 (at least
3105 * from Compaq) does not send this.. Try to generate
3106 * ACK for these frames from the host driver to make
3107 * power saving work with, e.g., Lucent WaveLAN f/w */
3108 hostap_rx(dev, skb, rx_stats);
3109 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
3110 }
3111 ret = AP_RX_EXIT;
3112 goto out;
3113 }
3114
3115 out:
3116 if (sta)
3117 atomic_dec(&sta->users);
3118
3119 return ret;
3120 }
3121
3122
3123 /* Called only as a tasklet (software IRQ) */
3124 int hostap_handle_sta_crypto(local_info_t *local,
3125 struct ieee80211_hdr *hdr,
3126 struct lib80211_crypt_data **crypt,
3127 void **sta_ptr)
3128 {
3129 struct sta_info *sta;
3130
3131 spin_lock(&local->ap->sta_table_lock);
3132 sta = ap_get_sta(local->ap, hdr->addr2);
3133 if (sta)
3134 atomic_inc(&sta->users);
3135 spin_unlock(&local->ap->sta_table_lock);
3136
3137 if (!sta)
3138 return -1;
3139
3140 if (sta->crypt) {
3141 *crypt = sta->crypt;
3142 *sta_ptr = sta;
3143 /* hostap_handle_sta_release() will be called to release STA
3144 * info */
3145 } else
3146 atomic_dec(&sta->users);
3147
3148 return 0;
3149 }
3150
3151
3152 /* Called only as a tasklet (software IRQ) */
3153 int hostap_is_sta_assoc(struct ap_data *ap, u8 *sta_addr)
3154 {
3155 struct sta_info *sta;
3156 int ret = 0;
3157
3158 spin_lock(&ap->sta_table_lock);
3159 sta = ap_get_sta(ap, sta_addr);
3160 if (sta != NULL && (sta->flags & WLAN_STA_ASSOC) && !sta->ap)
3161 ret = 1;
3162 spin_unlock(&ap->sta_table_lock);
3163
3164 return ret;
3165 }
3166
3167
3168 /* Called only as a tasklet (software IRQ) */
3169 int hostap_is_sta_authorized(struct ap_data *ap, u8 *sta_addr)
3170 {
3171 struct sta_info *sta;
3172 int ret = 0;
3173
3174 spin_lock(&ap->sta_table_lock);
3175 sta = ap_get_sta(ap, sta_addr);
3176 if (sta != NULL && (sta->flags & WLAN_STA_ASSOC) && !sta->ap &&
3177 ((sta->flags & WLAN_STA_AUTHORIZED) ||
3178 ap->local->ieee_802_1x == 0))
3179 ret = 1;
3180 spin_unlock(&ap->sta_table_lock);
3181
3182 return ret;
3183 }
3184
3185
3186 /* Called only as a tasklet (software IRQ) */
3187 int hostap_add_sta(struct ap_data *ap, u8 *sta_addr)
3188 {
3189 struct sta_info *sta;
3190 int ret = 1;
3191
3192 if (!ap)
3193 return -1;
3194
3195 spin_lock(&ap->sta_table_lock);
3196 sta = ap_get_sta(ap, sta_addr);
3197 if (sta)
3198 ret = 0;
3199 spin_unlock(&ap->sta_table_lock);
3200
3201 if (ret == 1) {
3202 sta = ap_add_sta(ap, sta_addr);
3203 if (!sta)
3204 return -1;
3205 sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
3206 sta->ap = 1;
3207 memset(sta->supported_rates, 0, sizeof(sta->supported_rates));
3208 /* No way of knowing which rates are supported since we did not
3209 * get supported rates element from beacon/assoc req. Assume
3210 * that remote end supports all 802.11b rates. */
3211 sta->supported_rates[0] = 0x82;
3212 sta->supported_rates[1] = 0x84;
3213 sta->supported_rates[2] = 0x0b;
3214 sta->supported_rates[3] = 0x16;
3215 sta->tx_supp_rates = WLAN_RATE_1M | WLAN_RATE_2M |
3216 WLAN_RATE_5M5 | WLAN_RATE_11M;
3217 sta->tx_rate = 110;
3218 sta->tx_max_rate = sta->tx_rate_idx = 3;
3219 }
3220
3221 return ret;
3222 }
3223
3224
3225 /* Called only as a tasklet (software IRQ) */
3226 int hostap_update_rx_stats(struct ap_data *ap,
3227 struct ieee80211_hdr *hdr,
3228 struct hostap_80211_rx_status *rx_stats)
3229 {
3230 struct sta_info *sta;
3231
3232 if (!ap)
3233 return -1;
3234
3235 spin_lock(&ap->sta_table_lock);
3236 sta = ap_get_sta(ap, hdr->addr2);
3237 if (sta) {
3238 sta->last_rx_silence = rx_stats->noise;
3239 sta->last_rx_signal = rx_stats->signal;
3240 sta->last_rx_rate = rx_stats->rate;
3241 sta->last_rx_updated = IW_QUAL_ALL_UPDATED | IW_QUAL_DBM;
3242 if (rx_stats->rate == 10)
3243 sta->rx_count[0]++;
3244 else if (rx_stats->rate == 20)
3245 sta->rx_count[1]++;
3246 else if (rx_stats->rate == 55)
3247 sta->rx_count[2]++;
3248 else if (rx_stats->rate == 110)
3249 sta->rx_count[3]++;
3250 }
3251 spin_unlock(&ap->sta_table_lock);
3252
3253 return sta ? 0 : -1;
3254 }
3255
3256
3257 void hostap_update_rates(local_info_t *local)
3258 {
3259 struct sta_info *sta;
3260 struct ap_data *ap = local->ap;
3261
3262 if (!ap)
3263 return;
3264
3265 spin_lock_bh(&ap->sta_table_lock);
3266 list_for_each_entry(sta, &ap->sta_list, list) {
3267 prism2_check_tx_rates(sta);
3268 }
3269 spin_unlock_bh(&ap->sta_table_lock);
3270 }
3271
3272
3273 void * ap_crypt_get_ptrs(struct ap_data *ap, u8 *addr, int permanent,
3274 struct lib80211_crypt_data ***crypt)
3275 {
3276 struct sta_info *sta;
3277
3278 spin_lock_bh(&ap->sta_table_lock);
3279 sta = ap_get_sta(ap, addr);
3280 if (sta)
3281 atomic_inc(&sta->users);
3282 spin_unlock_bh(&ap->sta_table_lock);
3283
3284 if (!sta && permanent)
3285 sta = ap_add_sta(ap, addr);
3286
3287 if (!sta)
3288 return NULL;
3289
3290 if (permanent)
3291 sta->flags |= WLAN_STA_PERM;
3292
3293 *crypt = &sta->crypt;
3294
3295 return sta;
3296 }
3297
3298
3299 void hostap_add_wds_links(local_info_t *local)
3300 {
3301 struct ap_data *ap = local->ap;
3302 struct sta_info *sta;
3303
3304 spin_lock_bh(&ap->sta_table_lock);
3305 list_for_each_entry(sta, &ap->sta_list, list) {
3306 if (sta->ap)
3307 hostap_wds_link_oper(local, sta->addr, WDS_ADD);
3308 }
3309 spin_unlock_bh(&ap->sta_table_lock);
3310
3311 schedule_work(&local->ap->wds_oper_queue);
3312 }
3313
3314
3315 void hostap_wds_link_oper(local_info_t *local, u8 *addr, wds_oper_type type)
3316 {
3317 struct wds_oper_data *entry;
3318
3319 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
3320 if (!entry)
3321 return;
3322 memcpy(entry->addr, addr, ETH_ALEN);
3323 entry->type = type;
3324 spin_lock_bh(&local->lock);
3325 entry->next = local->ap->wds_oper_entries;
3326 local->ap->wds_oper_entries = entry;
3327 spin_unlock_bh(&local->lock);
3328
3329 schedule_work(&local->ap->wds_oper_queue);
3330 }
3331
3332
3333 EXPORT_SYMBOL(hostap_init_data);
3334 EXPORT_SYMBOL(hostap_init_ap_proc);
3335 EXPORT_SYMBOL(hostap_free_data);
3336 EXPORT_SYMBOL(hostap_check_sta_fw_version);
3337 EXPORT_SYMBOL(hostap_handle_sta_tx_exc);
3338 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
3339 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
Linux with added FPC-III support