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[PATCH] UFS: inode->i_sem is not released in error path
[linux-2.6/verdex.git] / drivers / net / wireless / hostap / hostap_ap.c
blob9da94ab7f05f87e24eec2816ca5094e894906d01
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 * <jkmaline@cc.hut.fi>
5 * Copyright (c) 2002-2005, Jouni Malinen <jkmaline@cc.hut.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 static int other_ap_policy[MAX_PARM_DEVICES] = { AP_OTHER_AP_SKIP_ALL,
20 DEF_INTS };
21 module_param_array(other_ap_policy, int, NULL, 0444);
22 MODULE_PARM_DESC(other_ap_policy, "Other AP beacon monitoring policy (0-3)");
23
24 static int ap_max_inactivity[MAX_PARM_DEVICES] = { AP_MAX_INACTIVITY_SEC,
25 DEF_INTS };
26 module_param_array(ap_max_inactivity, int, NULL, 0444);
27 MODULE_PARM_DESC(ap_max_inactivity, "AP timeout (in seconds) for station "
28 "inactivity");
29
30 static int ap_bridge_packets[MAX_PARM_DEVICES] = { 1, DEF_INTS };
31 module_param_array(ap_bridge_packets, int, NULL, 0444);
32 MODULE_PARM_DESC(ap_bridge_packets, "Bridge packets directly between "
33 "stations");
34
35 static int autom_ap_wds[MAX_PARM_DEVICES] = { 0, DEF_INTS };
36 module_param_array(autom_ap_wds, int, NULL, 0444);
37 MODULE_PARM_DESC(autom_ap_wds, "Add WDS connections to other APs "
38 "automatically");
39
40
41 static struct sta_info* ap_get_sta(struct ap_data *ap, u8 *sta);
42 static void hostap_event_expired_sta(struct net_device *dev,
43 struct sta_info *sta);
44 static void handle_add_proc_queue(void *data);
45
46 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
47 static void handle_wds_oper_queue(void *data);
48 static void prism2_send_mgmt(struct net_device *dev,
49 u16 type_subtype, char *body,
50 int body_len, u8 *addr, u16 tx_cb_idx);
51 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
52
53
54 #ifndef PRISM2_NO_PROCFS_DEBUG
55 static int ap_debug_proc_read(char *page, char **start, off_t off,
56 int count, int *eof, void *data)
57 {
58 char *p = page;
59 struct ap_data *ap = (struct ap_data *) data;
60
61 if (off != 0) {
62 *eof = 1;
63 return 0;
64 }
65
66 p += sprintf(p, "BridgedUnicastFrames=%u\n", ap->bridged_unicast);
67 p += sprintf(p, "BridgedMulticastFrames=%u\n", ap->bridged_multicast);
68 p += sprintf(p, "max_inactivity=%u\n", ap->max_inactivity / HZ);
69 p += sprintf(p, "bridge_packets=%u\n", ap->bridge_packets);
70 p += sprintf(p, "nullfunc_ack=%u\n", ap->nullfunc_ack);
71 p += sprintf(p, "autom_ap_wds=%u\n", ap->autom_ap_wds);
72 p += sprintf(p, "auth_algs=%u\n", ap->local->auth_algs);
73 p += sprintf(p, "tx_drop_nonassoc=%u\n", ap->tx_drop_nonassoc);
74
75 return (p - page);
76 }
77 #endif /* PRISM2_NO_PROCFS_DEBUG */
78
79
80 static void ap_sta_hash_add(struct ap_data *ap, struct sta_info *sta)
81 {
82 sta->hnext = ap->sta_hash[STA_HASH(sta->addr)];
83 ap->sta_hash[STA_HASH(sta->addr)] = sta;
84 }
85
86 static void ap_sta_hash_del(struct ap_data *ap, struct sta_info *sta)
87 {
88 struct sta_info *s;
89
90 s = ap->sta_hash[STA_HASH(sta->addr)];
91 if (s == NULL) return;
92 if (memcmp(s->addr, sta->addr, ETH_ALEN) == 0) {
93 ap->sta_hash[STA_HASH(sta->addr)] = s->hnext;
94 return;
95 }
96
97 while (s->hnext != NULL && memcmp(s->hnext->addr, sta->addr, ETH_ALEN)
98 != 0)
99 s = s->hnext;
100 if (s->hnext != NULL)
101 s->hnext = s->hnext->hnext;
102 else
103 printk("AP: could not remove STA " MACSTR " from hash table\n",
104 MAC2STR(sta->addr));
105 }
106
107 static void ap_free_sta(struct ap_data *ap, struct sta_info *sta)
108 {
109 if (sta->ap && sta->local)
110 hostap_event_expired_sta(sta->local->dev, sta);
111
112 if (ap->proc != NULL) {
113 char name[20];
114 sprintf(name, MACSTR, MAC2STR(sta->addr));
115 remove_proc_entry(name, ap->proc);
116 }
117
118 if (sta->crypt) {
119 sta->crypt->ops->deinit(sta->crypt->priv);
120 kfree(sta->crypt);
121 sta->crypt = NULL;
122 }
123
124 skb_queue_purge(&sta->tx_buf);
125
126 ap->num_sta--;
127 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
128 if (sta->aid > 0)
129 ap->sta_aid[sta->aid - 1] = NULL;
130
131 if (!sta->ap && sta->u.sta.challenge)
132 kfree(sta->u.sta.challenge);
133 del_timer(&sta->timer);
134 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
135
136 kfree(sta);
137 }
138
139
140 static void hostap_set_tim(local_info_t *local, int aid, int set)
141 {
142 if (local->func->set_tim)
143 local->func->set_tim(local->dev, aid, set);
144 }
145
146
147 static void hostap_event_new_sta(struct net_device *dev, struct sta_info *sta)
148 {
149 union iwreq_data wrqu;
150 memset(&wrqu, 0, sizeof(wrqu));
151 memcpy(wrqu.addr.sa_data, sta->addr, ETH_ALEN);
152 wrqu.addr.sa_family = ARPHRD_ETHER;
153 wireless_send_event(dev, IWEVREGISTERED, &wrqu, NULL);
154 }
155
156
157 static void hostap_event_expired_sta(struct net_device *dev,
158 struct sta_info *sta)
159 {
160 union iwreq_data wrqu;
161 memset(&wrqu, 0, sizeof(wrqu));
162 memcpy(wrqu.addr.sa_data, sta->addr, ETH_ALEN);
163 wrqu.addr.sa_family = ARPHRD_ETHER;
164 wireless_send_event(dev, IWEVEXPIRED, &wrqu, NULL);
165 }
166
167
168 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
169
170 static void ap_handle_timer(unsigned long data)
171 {
172 struct sta_info *sta = (struct sta_info *) data;
173 local_info_t *local;
174 struct ap_data *ap;
175 unsigned long next_time = 0;
176 int was_assoc;
177
178 if (sta == NULL || sta->local == NULL || sta->local->ap == NULL) {
179 PDEBUG(DEBUG_AP, "ap_handle_timer() called with NULL data\n");
180 return;
181 }
182
183 local = sta->local;
184 ap = local->ap;
185 was_assoc = sta->flags & WLAN_STA_ASSOC;
186
187 if (atomic_read(&sta->users) != 0)
188 next_time = jiffies + HZ;
189 else if ((sta->flags & WLAN_STA_PERM) && !(sta->flags & WLAN_STA_AUTH))
190 next_time = jiffies + ap->max_inactivity;
191
192 if (time_before(jiffies, sta->last_rx + ap->max_inactivity)) {
193 /* station activity detected; reset timeout state */
194 sta->timeout_next = STA_NULLFUNC;
195 next_time = sta->last_rx + ap->max_inactivity;
196 } else if (sta->timeout_next == STA_DISASSOC &&
197 !(sta->flags & WLAN_STA_PENDING_POLL)) {
198 /* STA ACKed data nullfunc frame poll */
199 sta->timeout_next = STA_NULLFUNC;
200 next_time = jiffies + ap->max_inactivity;
201 }
202
203 if (next_time) {
204 sta->timer.expires = next_time;
205 add_timer(&sta->timer);
206 return;
207 }
208
209 if (sta->ap)
210 sta->timeout_next = STA_DEAUTH;
211
212 if (sta->timeout_next == STA_DEAUTH && !(sta->flags & WLAN_STA_PERM)) {
213 spin_lock(&ap->sta_table_lock);
214 ap_sta_hash_del(ap, sta);
215 list_del(&sta->list);
216 spin_unlock(&ap->sta_table_lock);
217 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
218 } else if (sta->timeout_next == STA_DISASSOC)
219 sta->flags &= ~WLAN_STA_ASSOC;
220
221 if (was_assoc && !(sta->flags & WLAN_STA_ASSOC) && !sta->ap)
222 hostap_event_expired_sta(local->dev, sta);
223
224 if (sta->timeout_next == STA_DEAUTH && sta->aid > 0 &&
225 !skb_queue_empty(&sta->tx_buf)) {
226 hostap_set_tim(local, sta->aid, 0);
227 sta->flags &= ~WLAN_STA_TIM;
228 }
229
230 if (sta->ap) {
231 if (ap->autom_ap_wds) {
232 PDEBUG(DEBUG_AP, "%s: removing automatic WDS "
233 "connection to AP " MACSTR "\n",
234 local->dev->name, MAC2STR(sta->addr));
235 hostap_wds_link_oper(local, sta->addr, WDS_DEL);
236 }
237 } else if (sta->timeout_next == STA_NULLFUNC) {
238 /* send data frame to poll STA and check whether this frame
239 * is ACKed */
240 /* FIX: IEEE80211_STYPE_NULLFUNC would be more appropriate, but
241 * it is apparently not retried so TX Exc events are not
242 * received for it */
243 sta->flags |= WLAN_STA_PENDING_POLL;
244 prism2_send_mgmt(local->dev, IEEE80211_FTYPE_DATA |
245 IEEE80211_STYPE_DATA, NULL, 0,
246 sta->addr, ap->tx_callback_poll);
247 } else {
248 int deauth = sta->timeout_next == STA_DEAUTH;
249 u16 resp;
250 PDEBUG(DEBUG_AP, "%s: sending %s info to STA " MACSTR
251 "(last=%lu, jiffies=%lu)\n",
252 local->dev->name,
253 deauth ? "deauthentication" : "disassociation",
254 MAC2STR(sta->addr), sta->last_rx, jiffies);
255
256 resp = cpu_to_le16(deauth ? WLAN_REASON_PREV_AUTH_NOT_VALID :
257 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
258 prism2_send_mgmt(local->dev, IEEE80211_FTYPE_MGMT |
259 (deauth ? IEEE80211_STYPE_DEAUTH :
260 IEEE80211_STYPE_DISASSOC),
261 (char *) &resp, 2, sta->addr, 0);
262 }
263
264 if (sta->timeout_next == STA_DEAUTH) {
265 if (sta->flags & WLAN_STA_PERM) {
266 PDEBUG(DEBUG_AP, "%s: STA " MACSTR " would have been "
267 "removed, but it has 'perm' flag\n",
268 local->dev->name, MAC2STR(sta->addr));
269 } else
270 ap_free_sta(ap, sta);
271 return;
272 }
273
274 if (sta->timeout_next == STA_NULLFUNC) {
275 sta->timeout_next = STA_DISASSOC;
276 sta->timer.expires = jiffies + AP_DISASSOC_DELAY;
277 } else {
278 sta->timeout_next = STA_DEAUTH;
279 sta->timer.expires = jiffies + AP_DEAUTH_DELAY;
280 }
281
282 add_timer(&sta->timer);
283 }
284
285
286 void hostap_deauth_all_stas(struct net_device *dev, struct ap_data *ap,
287 int resend)
288 {
289 u8 addr[ETH_ALEN];
290 u16 resp;
291 int i;
292
293 PDEBUG(DEBUG_AP, "%s: Deauthenticate all stations\n", dev->name);
294 memset(addr, 0xff, ETH_ALEN);
295
296 resp = __constant_cpu_to_le16(WLAN_REASON_PREV_AUTH_NOT_VALID);
297
298 /* deauth message sent; try to resend it few times; the message is
299 * broadcast, so it may be delayed until next DTIM; there is not much
300 * else we can do at this point since the driver is going to be shut
301 * down */
302 for (i = 0; i < 5; i++) {
303 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT |
304 IEEE80211_STYPE_DEAUTH,
305 (char *) &resp, 2, addr, 0);
306
307 if (!resend || ap->num_sta <= 0)
308 return;
309
310 mdelay(50);
311 }
312 }
313
314
315 static int ap_control_proc_read(char *page, char **start, off_t off,
316 int count, int *eof, void *data)
317 {
318 char *p = page;
319 struct ap_data *ap = (struct ap_data *) data;
320 char *policy_txt;
321 struct list_head *ptr;
322 struct mac_entry *entry;
323
324 if (off != 0) {
325 *eof = 1;
326 return 0;
327 }
328
329 switch (ap->mac_restrictions.policy) {
330 case MAC_POLICY_OPEN:
331 policy_txt = "open";
332 break;
333 case MAC_POLICY_ALLOW:
334 policy_txt = "allow";
335 break;
336 case MAC_POLICY_DENY:
337 policy_txt = "deny";
338 break;
339 default:
340 policy_txt = "unknown";
341 break;
342 };
343 p += sprintf(p, "MAC policy: %s\n", policy_txt);
344 p += sprintf(p, "MAC entries: %u\n", ap->mac_restrictions.entries);
345 p += sprintf(p, "MAC list:\n");
346 spin_lock_bh(&ap->mac_restrictions.lock);
347 for (ptr = ap->mac_restrictions.mac_list.next;
348 ptr != &ap->mac_restrictions.mac_list; ptr = ptr->next) {
349 if (p - page > PAGE_SIZE - 80) {
350 p += sprintf(p, "All entries did not fit one page.\n");
351 break;
352 }
353
354 entry = list_entry(ptr, struct mac_entry, list);
355 p += sprintf(p, MACSTR "\n", MAC2STR(entry->addr));
356 }
357 spin_unlock_bh(&ap->mac_restrictions.lock);
358
359 return (p - page);
360 }
361
362
363 static int ap_control_add_mac(struct mac_restrictions *mac_restrictions,
364 u8 *mac)
365 {
366 struct mac_entry *entry;
367
368 entry = kmalloc(sizeof(struct mac_entry), GFP_KERNEL);
369 if (entry == NULL)
370 return -1;
371
372 memcpy(entry->addr, mac, ETH_ALEN);
373
374 spin_lock_bh(&mac_restrictions->lock);
375 list_add_tail(&entry->list, &mac_restrictions->mac_list);
376 mac_restrictions->entries++;
377 spin_unlock_bh(&mac_restrictions->lock);
378
379 return 0;
380 }
381
382
383 static int ap_control_del_mac(struct mac_restrictions *mac_restrictions,
384 u8 *mac)
385 {
386 struct list_head *ptr;
387 struct mac_entry *entry;
388
389 spin_lock_bh(&mac_restrictions->lock);
390 for (ptr = mac_restrictions->mac_list.next;
391 ptr != &mac_restrictions->mac_list; ptr = ptr->next) {
392 entry = list_entry(ptr, struct mac_entry, list);
393
394 if (memcmp(entry->addr, mac, ETH_ALEN) == 0) {
395 list_del(ptr);
396 kfree(entry);
397 mac_restrictions->entries--;
398 spin_unlock_bh(&mac_restrictions->lock);
399 return 0;
400 }
401 }
402 spin_unlock_bh(&mac_restrictions->lock);
403 return -1;
404 }
405
406
407 static int ap_control_mac_deny(struct mac_restrictions *mac_restrictions,
408 u8 *mac)
409 {
410 struct list_head *ptr;
411 struct mac_entry *entry;
412 int found = 0;
413
414 if (mac_restrictions->policy == MAC_POLICY_OPEN)
415 return 0;
416
417 spin_lock_bh(&mac_restrictions->lock);
418 for (ptr = mac_restrictions->mac_list.next;
419 ptr != &mac_restrictions->mac_list; ptr = ptr->next) {
420 entry = list_entry(ptr, struct mac_entry, list);
421
422 if (memcmp(entry->addr, mac, ETH_ALEN) == 0) {
423 found = 1;
424 break;
425 }
426 }
427 spin_unlock_bh(&mac_restrictions->lock);
428
429 if (mac_restrictions->policy == MAC_POLICY_ALLOW)
430 return !found;
431 else
432 return found;
433 }
434
435
436 static void ap_control_flush_macs(struct mac_restrictions *mac_restrictions)
437 {
438 struct list_head *ptr, *n;
439 struct mac_entry *entry;
440
441 if (mac_restrictions->entries == 0)
442 return;
443
444 spin_lock_bh(&mac_restrictions->lock);
445 for (ptr = mac_restrictions->mac_list.next, n = ptr->next;
446 ptr != &mac_restrictions->mac_list;
447 ptr = n, n = ptr->next) {
448 entry = list_entry(ptr, struct mac_entry, list);
449 list_del(ptr);
450 kfree(entry);
451 }
452 mac_restrictions->entries = 0;
453 spin_unlock_bh(&mac_restrictions->lock);
454 }
455
456
457 static int ap_control_kick_mac(struct ap_data *ap, struct net_device *dev,
458 u8 *mac)
459 {
460 struct sta_info *sta;
461 u16 resp;
462
463 spin_lock_bh(&ap->sta_table_lock);
464 sta = ap_get_sta(ap, mac);
465 if (sta) {
466 ap_sta_hash_del(ap, sta);
467 list_del(&sta->list);
468 }
469 spin_unlock_bh(&ap->sta_table_lock);
470
471 if (!sta)
472 return -EINVAL;
473
474 resp = cpu_to_le16(WLAN_REASON_PREV_AUTH_NOT_VALID);
475 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_DEAUTH,
476 (char *) &resp, 2, sta->addr, 0);
477
478 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap)
479 hostap_event_expired_sta(dev, sta);
480
481 ap_free_sta(ap, sta);
482
483 return 0;
484 }
485
486 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
487
488
489 static void ap_control_kickall(struct ap_data *ap)
490 {
491 struct list_head *ptr, *n;
492 struct sta_info *sta;
493
494 spin_lock_bh(&ap->sta_table_lock);
495 for (ptr = ap->sta_list.next, n = ptr->next; ptr != &ap->sta_list;
496 ptr = n, n = ptr->next) {
497 sta = list_entry(ptr, struct sta_info, list);
498 ap_sta_hash_del(ap, sta);
499 list_del(&sta->list);
500 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
501 hostap_event_expired_sta(sta->local->dev, sta);
502 ap_free_sta(ap, sta);
503 }
504 spin_unlock_bh(&ap->sta_table_lock);
505 }
506
507
508 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
509
510 #define PROC_LIMIT (PAGE_SIZE - 80)
511
512 static int prism2_ap_proc_read(char *page, char **start, off_t off,
513 int count, int *eof, void *data)
514 {
515 char *p = page;
516 struct ap_data *ap = (struct ap_data *) data;
517 struct list_head *ptr;
518 int i;
519
520 if (off > PROC_LIMIT) {
521 *eof = 1;
522 return 0;
523 }
524
525 p += sprintf(p, "# BSSID CHAN SIGNAL NOISE RATE SSID FLAGS\n");
526 spin_lock_bh(&ap->sta_table_lock);
527 for (ptr = ap->sta_list.next; ptr != &ap->sta_list; ptr = ptr->next) {
528 struct sta_info *sta = (struct sta_info *) ptr;
529
530 if (!sta->ap)
531 continue;
532
533 p += sprintf(p, MACSTR " %d %d %d %d '", MAC2STR(sta->addr),
534 sta->u.ap.channel, sta->last_rx_signal,
535 sta->last_rx_silence, sta->last_rx_rate);
536 for (i = 0; i < sta->u.ap.ssid_len; i++)
537 p += sprintf(p, ((sta->u.ap.ssid[i] >= 32 &&
538 sta->u.ap.ssid[i] < 127) ?
539 "%c" : "<%02x>"),
540 sta->u.ap.ssid[i]);
541 p += sprintf(p, "'");
542 if (sta->capability & WLAN_CAPABILITY_ESS)
543 p += sprintf(p, " [ESS]");
544 if (sta->capability & WLAN_CAPABILITY_IBSS)
545 p += sprintf(p, " [IBSS]");
546 if (sta->capability & WLAN_CAPABILITY_PRIVACY)
547 p += sprintf(p, " [WEP]");
548 p += sprintf(p, "\n");
549
550 if ((p - page) > PROC_LIMIT) {
551 printk(KERN_DEBUG "hostap: ap proc did not fit\n");
552 break;
553 }
554 }
555 spin_unlock_bh(&ap->sta_table_lock);
556
557 if ((p - page) <= off) {
558 *eof = 1;
559 return 0;
560 }
561
562 *start = page + off;
563
564 return (p - page - off);
565 }
566 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
567
568
569 void hostap_check_sta_fw_version(struct ap_data *ap, int sta_fw_ver)
570 {
571 if (!ap)
572 return;
573
574 if (sta_fw_ver == PRISM2_FW_VER(0,8,0)) {
575 PDEBUG(DEBUG_AP, "Using data::nullfunc ACK workaround - "
576 "firmware upgrade recommended\n");
577 ap->nullfunc_ack = 1;
578 } else
579 ap->nullfunc_ack = 0;
580
581 if (sta_fw_ver == PRISM2_FW_VER(1,4,2)) {
582 printk(KERN_WARNING "%s: Warning: secondary station firmware "
583 "version 1.4.2 does not seem to work in Host AP mode\n",
584 ap->local->dev->name);
585 }
586 }
587
588
589 /* Called only as a tasklet (software IRQ) */
590 static void hostap_ap_tx_cb(struct sk_buff *skb, int ok, void *data)
591 {
592 struct ap_data *ap = data;
593 u16 fc;
594 struct ieee80211_hdr_4addr *hdr;
595
596 if (!ap->local->hostapd || !ap->local->apdev) {
597 dev_kfree_skb(skb);
598 return;
599 }
600
601 hdr = (struct ieee80211_hdr_4addr *) skb->data;
602 fc = le16_to_cpu(hdr->frame_ctl);
603
604 /* Pass the TX callback frame to the hostapd; use 802.11 header version
605 * 1 to indicate failure (no ACK) and 2 success (frame ACKed) */
606
607 fc &= ~IEEE80211_FCTL_VERS;
608 fc |= ok ? BIT(1) : BIT(0);
609 hdr->frame_ctl = cpu_to_le16(fc);
610
611 skb->dev = ap->local->apdev;
612 skb_pull(skb, hostap_80211_get_hdrlen(fc));
613 skb->pkt_type = PACKET_OTHERHOST;
614 skb->protocol = __constant_htons(ETH_P_802_2);
615 memset(skb->cb, 0, sizeof(skb->cb));
616 netif_rx(skb);
617 }
618
619
620 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
621 /* Called only as a tasklet (software IRQ) */
622 static void hostap_ap_tx_cb_auth(struct sk_buff *skb, int ok, void *data)
623 {
624 struct ap_data *ap = data;
625 struct net_device *dev = ap->local->dev;
626 struct ieee80211_hdr_4addr *hdr;
627 u16 fc, *pos, auth_alg, auth_transaction, status;
628 struct sta_info *sta = NULL;
629 char *txt = NULL;
630
631 if (ap->local->hostapd) {
632 dev_kfree_skb(skb);
633 return;
634 }
635
636 hdr = (struct ieee80211_hdr_4addr *) skb->data;
637 fc = le16_to_cpu(hdr->frame_ctl);
638 if (WLAN_FC_GET_TYPE(fc) != IEEE80211_FTYPE_MGMT ||
639 WLAN_FC_GET_STYPE(fc) != IEEE80211_STYPE_AUTH ||
640 skb->len < IEEE80211_MGMT_HDR_LEN + 6) {
641 printk(KERN_DEBUG "%s: hostap_ap_tx_cb_auth received invalid "
642 "frame\n", dev->name);
643 dev_kfree_skb(skb);
644 return;
645 }
646
647 pos = (u16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
648 auth_alg = le16_to_cpu(*pos++);
649 auth_transaction = le16_to_cpu(*pos++);
650 status = le16_to_cpu(*pos++);
651
652 if (!ok) {
653 txt = "frame was not ACKed";
654 goto done;
655 }
656
657 spin_lock(&ap->sta_table_lock);
658 sta = ap_get_sta(ap, hdr->addr1);
659 if (sta)
660 atomic_inc(&sta->users);
661 spin_unlock(&ap->sta_table_lock);
662
663 if (!sta) {
664 txt = "STA not found";
665 goto done;
666 }
667
668 if (status == WLAN_STATUS_SUCCESS &&
669 ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 2) ||
670 (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 4))) {
671 txt = "STA authenticated";
672 sta->flags |= WLAN_STA_AUTH;
673 sta->last_auth = jiffies;
674 } else if (status != WLAN_STATUS_SUCCESS)
675 txt = "authentication failed";
676
677 done:
678 if (sta)
679 atomic_dec(&sta->users);
680 if (txt) {
681 PDEBUG(DEBUG_AP, "%s: " MACSTR " auth_cb - alg=%d trans#=%d "
682 "status=%d - %s\n",
683 dev->name, MAC2STR(hdr->addr1), auth_alg,
684 auth_transaction, status, txt);
685 }
686 dev_kfree_skb(skb);
687 }
688
689
690 /* Called only as a tasklet (software IRQ) */
691 static void hostap_ap_tx_cb_assoc(struct sk_buff *skb, int ok, void *data)
692 {
693 struct ap_data *ap = data;
694 struct net_device *dev = ap->local->dev;
695 struct ieee80211_hdr_4addr *hdr;
696 u16 fc, *pos, status;
697 struct sta_info *sta = NULL;
698 char *txt = NULL;
699
700 if (ap->local->hostapd) {
701 dev_kfree_skb(skb);
702 return;
703 }
704
705 hdr = (struct ieee80211_hdr_4addr *) skb->data;
706 fc = le16_to_cpu(hdr->frame_ctl);
707 if (WLAN_FC_GET_TYPE(fc) != IEEE80211_FTYPE_MGMT ||
708 (WLAN_FC_GET_STYPE(fc) != IEEE80211_STYPE_ASSOC_RESP &&
709 WLAN_FC_GET_STYPE(fc) != IEEE80211_STYPE_REASSOC_RESP) ||
710 skb->len < IEEE80211_MGMT_HDR_LEN + 4) {
711 printk(KERN_DEBUG "%s: hostap_ap_tx_cb_assoc received invalid "
712 "frame\n", dev->name);
713 dev_kfree_skb(skb);
714 return;
715 }
716
717 if (!ok) {
718 txt = "frame was not ACKed";
719 goto done;
720 }
721
722 spin_lock(&ap->sta_table_lock);
723 sta = ap_get_sta(ap, hdr->addr1);
724 if (sta)
725 atomic_inc(&sta->users);
726 spin_unlock(&ap->sta_table_lock);
727
728 if (!sta) {
729 txt = "STA not found";
730 goto done;
731 }
732
733 pos = (u16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
734 pos++;
735 status = le16_to_cpu(*pos++);
736 if (status == WLAN_STATUS_SUCCESS) {
737 if (!(sta->flags & WLAN_STA_ASSOC))
738 hostap_event_new_sta(dev, sta);
739 txt = "STA associated";
740 sta->flags |= WLAN_STA_ASSOC;
741 sta->last_assoc = jiffies;
742 } else
743 txt = "association failed";
744
745 done:
746 if (sta)
747 atomic_dec(&sta->users);
748 if (txt) {
749 PDEBUG(DEBUG_AP, "%s: " MACSTR " assoc_cb - %s\n",
750 dev->name, MAC2STR(hdr->addr1), txt);
751 }
752 dev_kfree_skb(skb);
753 }
754
755 /* Called only as a tasklet (software IRQ); TX callback for poll frames used
756 * in verifying whether the STA is still present. */
757 static void hostap_ap_tx_cb_poll(struct sk_buff *skb, int ok, void *data)
758 {
759 struct ap_data *ap = data;
760 struct ieee80211_hdr_4addr *hdr;
761 struct sta_info *sta;
762
763 if (skb->len < 24)
764 goto fail;
765 hdr = (struct ieee80211_hdr_4addr *) skb->data;
766 if (ok) {
767 spin_lock(&ap->sta_table_lock);
768 sta = ap_get_sta(ap, hdr->addr1);
769 if (sta)
770 sta->flags &= ~WLAN_STA_PENDING_POLL;
771 spin_unlock(&ap->sta_table_lock);
772 } else {
773 PDEBUG(DEBUG_AP, "%s: STA " MACSTR " did not ACK activity "
774 "poll frame\n", ap->local->dev->name,
775 MAC2STR(hdr->addr1));
776 }
777
778 fail:
779 dev_kfree_skb(skb);
780 }
781 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
782
783
784 void hostap_init_data(local_info_t *local)
785 {
786 struct ap_data *ap = local->ap;
787
788 if (ap == NULL) {
789 printk(KERN_WARNING "hostap_init_data: ap == NULL\n");
790 return;
791 }
792 memset(ap, 0, sizeof(struct ap_data));
793 ap->local = local;
794
795 ap->ap_policy = GET_INT_PARM(other_ap_policy, local->card_idx);
796 ap->bridge_packets = GET_INT_PARM(ap_bridge_packets, local->card_idx);
797 ap->max_inactivity =
798 GET_INT_PARM(ap_max_inactivity, local->card_idx) * HZ;
799 ap->autom_ap_wds = GET_INT_PARM(autom_ap_wds, local->card_idx);
800
801 spin_lock_init(&ap->sta_table_lock);
802 INIT_LIST_HEAD(&ap->sta_list);
803
804 /* Initialize task queue structure for AP management */
805 INIT_WORK(&local->ap->add_sta_proc_queue, handle_add_proc_queue, ap);
806
807 ap->tx_callback_idx =
808 hostap_tx_callback_register(local, hostap_ap_tx_cb, ap);
809 if (ap->tx_callback_idx == 0)
810 printk(KERN_WARNING "%s: failed to register TX callback for "
811 "AP\n", local->dev->name);
812 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
813 INIT_WORK(&local->ap->wds_oper_queue, handle_wds_oper_queue, local);
814
815 ap->tx_callback_auth =
816 hostap_tx_callback_register(local, hostap_ap_tx_cb_auth, ap);
817 ap->tx_callback_assoc =
818 hostap_tx_callback_register(local, hostap_ap_tx_cb_assoc, ap);
819 ap->tx_callback_poll =
820 hostap_tx_callback_register(local, hostap_ap_tx_cb_poll, ap);
821 if (ap->tx_callback_auth == 0 || ap->tx_callback_assoc == 0 ||
822 ap->tx_callback_poll == 0)
823 printk(KERN_WARNING "%s: failed to register TX callback for "
824 "AP\n", local->dev->name);
825
826 spin_lock_init(&ap->mac_restrictions.lock);
827 INIT_LIST_HEAD(&ap->mac_restrictions.mac_list);
828 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
829
830 ap->initialized = 1;
831 }
832
833
834 void hostap_init_ap_proc(local_info_t *local)
835 {
836 struct ap_data *ap = local->ap;
837
838 ap->proc = local->proc;
839 if (ap->proc == NULL)
840 return;
841
842 #ifndef PRISM2_NO_PROCFS_DEBUG
843 create_proc_read_entry("ap_debug", 0, ap->proc,
844 ap_debug_proc_read, ap);
845 #endif /* PRISM2_NO_PROCFS_DEBUG */
846
847 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
848 create_proc_read_entry("ap_control", 0, ap->proc,
849 ap_control_proc_read, ap);
850 create_proc_read_entry("ap", 0, ap->proc,
851 prism2_ap_proc_read, ap);
852 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
853
854 }
855
856
857 void hostap_free_data(struct ap_data *ap)
858 {
859 struct list_head *n, *ptr;
860
861 if (ap == NULL || !ap->initialized) {
862 printk(KERN_DEBUG "hostap_free_data: ap has not yet been "
863 "initialized - skip resource freeing\n");
864 return;
865 }
866
867 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
868 if (ap->crypt)
869 ap->crypt->deinit(ap->crypt_priv);
870 ap->crypt = ap->crypt_priv = NULL;
871 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
872
873 list_for_each_safe(ptr, n, &ap->sta_list) {
874 struct sta_info *sta = list_entry(ptr, struct sta_info, list);
875 ap_sta_hash_del(ap, sta);
876 list_del(&sta->list);
877 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
878 hostap_event_expired_sta(sta->local->dev, sta);
879 ap_free_sta(ap, sta);
880 }
881
882 #ifndef PRISM2_NO_PROCFS_DEBUG
883 if (ap->proc != NULL) {
884 remove_proc_entry("ap_debug", ap->proc);
885 }
886 #endif /* PRISM2_NO_PROCFS_DEBUG */
887
888 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
889 if (ap->proc != NULL) {
890 remove_proc_entry("ap", ap->proc);
891 remove_proc_entry("ap_control", ap->proc);
892 }
893 ap_control_flush_macs(&ap->mac_restrictions);
894 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
895
896 ap->initialized = 0;
897 }
898
899
900 /* caller should have mutex for AP STA list handling */
901 static struct sta_info* ap_get_sta(struct ap_data *ap, u8 *sta)
902 {
903 struct sta_info *s;
904
905 s = ap->sta_hash[STA_HASH(sta)];
906 while (s != NULL && memcmp(s->addr, sta, ETH_ALEN) != 0)
907 s = s->hnext;
908 return s;
909 }
910
911
912 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
913
914 /* Called from timer handler and from scheduled AP queue handlers */
915 static void prism2_send_mgmt(struct net_device *dev,
916 u16 type_subtype, char *body,
917 int body_len, u8 *addr, u16 tx_cb_idx)
918 {
919 struct hostap_interface *iface;
920 local_info_t *local;
921 struct ieee80211_hdr_4addr *hdr;
922 u16 fc;
923 struct sk_buff *skb;
924 struct hostap_skb_tx_data *meta;
925 int hdrlen;
926
927 iface = netdev_priv(dev);
928 local = iface->local;
929 dev = local->dev; /* always use master radio device */
930 iface = netdev_priv(dev);
931
932 if (!(dev->flags & IFF_UP)) {
933 PDEBUG(DEBUG_AP, "%s: prism2_send_mgmt - device is not UP - "
934 "cannot send frame\n", dev->name);
935 return;
936 }
937
938 skb = dev_alloc_skb(sizeof(*hdr) + body_len);
939 if (skb == NULL) {
940 PDEBUG(DEBUG_AP, "%s: prism2_send_mgmt failed to allocate "
941 "skb\n", dev->name);
942 return;
943 }
944
945 fc = type_subtype;
946 hdrlen = hostap_80211_get_hdrlen(fc);
947 hdr = (struct ieee80211_hdr_4addr *) skb_put(skb, hdrlen);
948 if (body)
949 memcpy(skb_put(skb, body_len), body, body_len);
950
951 memset(hdr, 0, hdrlen);
952
953 /* FIX: ctrl::ack sending used special HFA384X_TX_CTRL_802_11
954 * tx_control instead of using local->tx_control */
955
956
957 memcpy(hdr->addr1, addr, ETH_ALEN); /* DA / RA */
958 if (WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_DATA) {
959 fc |= IEEE80211_FCTL_FROMDS;
960 memcpy(hdr->addr2, dev->dev_addr, ETH_ALEN); /* BSSID */
961 memcpy(hdr->addr3, dev->dev_addr, ETH_ALEN); /* SA */
962 } else if (WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_CTL) {
963 /* control:ACK does not have addr2 or addr3 */
964 memset(hdr->addr2, 0, ETH_ALEN);
965 memset(hdr->addr3, 0, ETH_ALEN);
966 } else {
967 memcpy(hdr->addr2, dev->dev_addr, ETH_ALEN); /* SA */
968 memcpy(hdr->addr3, dev->dev_addr, ETH_ALEN); /* BSSID */
969 }
970
971 hdr->frame_ctl = cpu_to_le16(fc);
972
973 meta = (struct hostap_skb_tx_data *) skb->cb;
974 memset(meta, 0, sizeof(*meta));
975 meta->magic = HOSTAP_SKB_TX_DATA_MAGIC;
976 meta->iface = iface;
977 meta->tx_cb_idx = tx_cb_idx;
978
979 skb->dev = dev;
980 skb->mac.raw = skb->nh.raw = skb->data;
981 dev_queue_xmit(skb);
982 }
983 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
984
985
986 static int prism2_sta_proc_read(char *page, char **start, off_t off,
987 int count, int *eof, void *data)
988 {
989 char *p = page;
990 struct sta_info *sta = (struct sta_info *) data;
991 int i;
992
993 /* FIX: possible race condition.. the STA data could have just expired,
994 * but proc entry was still here so that the read could have started;
995 * some locking should be done here.. */
996
997 if (off != 0) {
998 *eof = 1;
999 return 0;
1000 }
1001
1002 p += sprintf(p, "%s=" MACSTR "\nusers=%d\naid=%d\n"
1003 "flags=0x%04x%s%s%s%s%s%s%s\n"
1004 "capability=0x%02x\nlisten_interval=%d\nsupported_rates=",
1005 sta->ap ? "AP" : "STA",
1006 MAC2STR(sta->addr), atomic_read(&sta->users), sta->aid,
1007 sta->flags,
1008 sta->flags & WLAN_STA_AUTH ? " AUTH" : "",
1009 sta->flags & WLAN_STA_ASSOC ? " ASSOC" : "",
1010 sta->flags & WLAN_STA_PS ? " PS" : "",
1011 sta->flags & WLAN_STA_TIM ? " TIM" : "",
1012 sta->flags & WLAN_STA_PERM ? " PERM" : "",
1013 sta->flags & WLAN_STA_AUTHORIZED ? " AUTHORIZED" : "",
1014 sta->flags & WLAN_STA_PENDING_POLL ? " POLL" : "",
1015 sta->capability, sta->listen_interval);
1016 /* supported_rates: 500 kbit/s units with msb ignored */
1017 for (i = 0; i < sizeof(sta->supported_rates); i++)
1018 if (sta->supported_rates[i] != 0)
1019 p += sprintf(p, "%d%sMbps ",
1020 (sta->supported_rates[i] & 0x7f) / 2,
1021 sta->supported_rates[i] & 1 ? ".5" : "");
1022 p += sprintf(p, "\njiffies=%lu\nlast_auth=%lu\nlast_assoc=%lu\n"
1023 "last_rx=%lu\nlast_tx=%lu\nrx_packets=%lu\n"
1024 "tx_packets=%lu\n"
1025 "rx_bytes=%lu\ntx_bytes=%lu\nbuffer_count=%d\n"
1026 "last_rx: silence=%d dBm signal=%d dBm rate=%d%s Mbps\n"
1027 "tx_rate=%d\ntx[1M]=%d\ntx[2M]=%d\ntx[5.5M]=%d\n"
1028 "tx[11M]=%d\n"
1029 "rx[1M]=%d\nrx[2M]=%d\nrx[5.5M]=%d\nrx[11M]=%d\n",
1030 jiffies, sta->last_auth, sta->last_assoc, sta->last_rx,
1031 sta->last_tx,
1032 sta->rx_packets, sta->tx_packets, sta->rx_bytes,
1033 sta->tx_bytes, skb_queue_len(&sta->tx_buf),
1034 sta->last_rx_silence,
1035 sta->last_rx_signal, sta->last_rx_rate / 10,
1036 sta->last_rx_rate % 10 ? ".5" : "",
1037 sta->tx_rate, sta->tx_count[0], sta->tx_count[1],
1038 sta->tx_count[2], sta->tx_count[3], sta->rx_count[0],
1039 sta->rx_count[1], sta->rx_count[2], sta->rx_count[3]);
1040 if (sta->crypt && sta->crypt->ops && sta->crypt->ops->print_stats)
1041 p = sta->crypt->ops->print_stats(p, sta->crypt->priv);
1042 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1043 if (sta->ap) {
1044 if (sta->u.ap.channel >= 0)
1045 p += sprintf(p, "channel=%d\n", sta->u.ap.channel);
1046 p += sprintf(p, "ssid=");
1047 for (i = 0; i < sta->u.ap.ssid_len; i++)
1048 p += sprintf(p, ((sta->u.ap.ssid[i] >= 32 &&
1049 sta->u.ap.ssid[i] < 127) ?
1050 "%c" : "<%02x>"),
1051 sta->u.ap.ssid[i]);
1052 p += sprintf(p, "\n");
1053 }
1054 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1055
1056 return (p - page);
1057 }
1058
1059
1060 static void handle_add_proc_queue(void *data)
1061 {
1062 struct ap_data *ap = (struct ap_data *) data;
1063 struct sta_info *sta;
1064 char name[20];
1065 struct add_sta_proc_data *entry, *prev;
1066
1067 entry = ap->add_sta_proc_entries;
1068 ap->add_sta_proc_entries = NULL;
1069
1070 while (entry) {
1071 spin_lock_bh(&ap->sta_table_lock);
1072 sta = ap_get_sta(ap, entry->addr);
1073 if (sta)
1074 atomic_inc(&sta->users);
1075 spin_unlock_bh(&ap->sta_table_lock);
1076
1077 if (sta) {
1078 sprintf(name, MACSTR, MAC2STR(sta->addr));
1079 sta->proc = create_proc_read_entry(
1080 name, 0, ap->proc,
1081 prism2_sta_proc_read, sta);
1082
1083 atomic_dec(&sta->users);
1084 }
1085
1086 prev = entry;
1087 entry = entry->next;
1088 kfree(prev);
1089 }
1090 }
1091
1092
1093 static struct sta_info * ap_add_sta(struct ap_data *ap, u8 *addr)
1094 {
1095 struct sta_info *sta;
1096
1097 sta = (struct sta_info *)
1098 kmalloc(sizeof(struct sta_info), GFP_ATOMIC);
1099 if (sta == NULL) {
1100 PDEBUG(DEBUG_AP, "AP: kmalloc failed\n");
1101 return NULL;
1102 }
1103
1104 /* initialize STA info data */
1105 memset(sta, 0, sizeof(struct sta_info));
1106 sta->local = ap->local;
1107 skb_queue_head_init(&sta->tx_buf);
1108 memcpy(sta->addr, addr, ETH_ALEN);
1109
1110 atomic_inc(&sta->users);
1111 spin_lock_bh(&ap->sta_table_lock);
1112 list_add(&sta->list, &ap->sta_list);
1113 ap->num_sta++;
1114 ap_sta_hash_add(ap, sta);
1115 spin_unlock_bh(&ap->sta_table_lock);
1116
1117 if (ap->proc) {
1118 struct add_sta_proc_data *entry;
1119 /* schedule a non-interrupt context process to add a procfs
1120 * entry for the STA since procfs code use GFP_KERNEL */
1121 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
1122 if (entry) {
1123 memcpy(entry->addr, sta->addr, ETH_ALEN);
1124 entry->next = ap->add_sta_proc_entries;
1125 ap->add_sta_proc_entries = entry;
1126 schedule_work(&ap->add_sta_proc_queue);
1127 } else
1128 printk(KERN_DEBUG "Failed to add STA proc data\n");
1129 }
1130
1131 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1132 init_timer(&sta->timer);
1133 sta->timer.expires = jiffies + ap->max_inactivity;
1134 sta->timer.data = (unsigned long) sta;
1135 sta->timer.function = ap_handle_timer;
1136 if (!ap->local->hostapd)
1137 add_timer(&sta->timer);
1138 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1139
1140 return sta;
1141 }
1142
1143
1144 static int ap_tx_rate_ok(int rateidx, struct sta_info *sta,
1145 local_info_t *local)
1146 {
1147 if (rateidx > sta->tx_max_rate ||
1148 !(sta->tx_supp_rates & (1 << rateidx)))
1149 return 0;
1150
1151 if (local->tx_rate_control != 0 &&
1152 !(local->tx_rate_control & (1 << rateidx)))
1153 return 0;
1154
1155 return 1;
1156 }
1157
1158
1159 static void prism2_check_tx_rates(struct sta_info *sta)
1160 {
1161 int i;
1162
1163 sta->tx_supp_rates = 0;
1164 for (i = 0; i < sizeof(sta->supported_rates); i++) {
1165 if ((sta->supported_rates[i] & 0x7f) == 2)
1166 sta->tx_supp_rates |= WLAN_RATE_1M;
1167 if ((sta->supported_rates[i] & 0x7f) == 4)
1168 sta->tx_supp_rates |= WLAN_RATE_2M;
1169 if ((sta->supported_rates[i] & 0x7f) == 11)
1170 sta->tx_supp_rates |= WLAN_RATE_5M5;
1171 if ((sta->supported_rates[i] & 0x7f) == 22)
1172 sta->tx_supp_rates |= WLAN_RATE_11M;
1173 }
1174 sta->tx_max_rate = sta->tx_rate = sta->tx_rate_idx = 0;
1175 if (sta->tx_supp_rates & WLAN_RATE_1M) {
1176 sta->tx_max_rate = 0;
1177 if (ap_tx_rate_ok(0, sta, sta->local)) {
1178 sta->tx_rate = 10;
1179 sta->tx_rate_idx = 0;
1180 }
1181 }
1182 if (sta->tx_supp_rates & WLAN_RATE_2M) {
1183 sta->tx_max_rate = 1;
1184 if (ap_tx_rate_ok(1, sta, sta->local)) {
1185 sta->tx_rate = 20;
1186 sta->tx_rate_idx = 1;
1187 }
1188 }
1189 if (sta->tx_supp_rates & WLAN_RATE_5M5) {
1190 sta->tx_max_rate = 2;
1191 if (ap_tx_rate_ok(2, sta, sta->local)) {
1192 sta->tx_rate = 55;
1193 sta->tx_rate_idx = 2;
1194 }
1195 }
1196 if (sta->tx_supp_rates & WLAN_RATE_11M) {
1197 sta->tx_max_rate = 3;
1198 if (ap_tx_rate_ok(3, sta, sta->local)) {
1199 sta->tx_rate = 110;
1200 sta->tx_rate_idx = 3;
1201 }
1202 }
1203 }
1204
1205
1206 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1207
1208 static void ap_crypt_init(struct ap_data *ap)
1209 {
1210 ap->crypt = ieee80211_get_crypto_ops("WEP");
1211
1212 if (ap->crypt) {
1213 if (ap->crypt->init) {
1214 ap->crypt_priv = ap->crypt->init(0);
1215 if (ap->crypt_priv == NULL)
1216 ap->crypt = NULL;
1217 else {
1218 u8 key[WEP_KEY_LEN];
1219 get_random_bytes(key, WEP_KEY_LEN);
1220 ap->crypt->set_key(key, WEP_KEY_LEN, NULL,
1221 ap->crypt_priv);
1222 }
1223 }
1224 }
1225
1226 if (ap->crypt == NULL) {
1227 printk(KERN_WARNING "AP could not initialize WEP: load module "
1228 "ieee80211_crypt_wep.ko\n");
1229 }
1230 }
1231
1232
1233 /* Generate challenge data for shared key authentication. IEEE 802.11 specifies
1234 * that WEP algorithm is used for generating challange. This should be unique,
1235 * but otherwise there is not really need for randomness etc. Initialize WEP
1236 * with pseudo random key and then use increasing IV to get unique challenge
1237 * streams.
1238 *
1239 * Called only as a scheduled task for pending AP frames.
1240 */
1241 static char * ap_auth_make_challenge(struct ap_data *ap)
1242 {
1243 char *tmpbuf;
1244 struct sk_buff *skb;
1245
1246 if (ap->crypt == NULL) {
1247 ap_crypt_init(ap);
1248 if (ap->crypt == NULL)
1249 return NULL;
1250 }
1251
1252 tmpbuf = (char *) kmalloc(WLAN_AUTH_CHALLENGE_LEN, GFP_ATOMIC);
1253 if (tmpbuf == NULL) {
1254 PDEBUG(DEBUG_AP, "AP: kmalloc failed for challenge\n");
1255 return NULL;
1256 }
1257
1258 skb = dev_alloc_skb(WLAN_AUTH_CHALLENGE_LEN +
1259 ap->crypt->extra_mpdu_prefix_len +
1260 ap->crypt->extra_mpdu_postfix_len);
1261 if (skb == NULL) {
1262 kfree(tmpbuf);
1263 return NULL;
1264 }
1265
1266 skb_reserve(skb, ap->crypt->extra_mpdu_prefix_len);
1267 memset(skb_put(skb, WLAN_AUTH_CHALLENGE_LEN), 0,
1268 WLAN_AUTH_CHALLENGE_LEN);
1269 if (ap->crypt->encrypt_mpdu(skb, 0, ap->crypt_priv)) {
1270 dev_kfree_skb(skb);
1271 kfree(tmpbuf);
1272 return NULL;
1273 }
1274
1275 memcpy(tmpbuf, skb->data + ap->crypt->extra_mpdu_prefix_len,
1276 WLAN_AUTH_CHALLENGE_LEN);
1277 dev_kfree_skb(skb);
1278
1279 return tmpbuf;
1280 }
1281
1282
1283 /* Called only as a scheduled task for pending AP frames. */
1284 static void handle_authen(local_info_t *local, struct sk_buff *skb,
1285 struct hostap_80211_rx_status *rx_stats)
1286 {
1287 struct net_device *dev = local->dev;
1288 struct ieee80211_hdr_4addr *hdr = (struct ieee80211_hdr_4addr *) skb->data;
1289 size_t hdrlen;
1290 struct ap_data *ap = local->ap;
1291 char body[8 + WLAN_AUTH_CHALLENGE_LEN], *challenge = NULL;
1292 int len, olen;
1293 u16 auth_alg, auth_transaction, status_code, *pos;
1294 u16 resp = WLAN_STATUS_SUCCESS, fc;
1295 struct sta_info *sta = NULL;
1296 struct ieee80211_crypt_data *crypt;
1297 char *txt = "";
1298
1299 len = skb->len - IEEE80211_MGMT_HDR_LEN;
1300
1301 fc = le16_to_cpu(hdr->frame_ctl);
1302 hdrlen = hostap_80211_get_hdrlen(fc);
1303
1304 if (len < 6) {
1305 PDEBUG(DEBUG_AP, "%s: handle_authen - too short payload "
1306 "(len=%d) from " MACSTR "\n", dev->name, len,
1307 MAC2STR(hdr->addr2));
1308 return;
1309 }
1310
1311 spin_lock_bh(&local->ap->sta_table_lock);
1312 sta = ap_get_sta(local->ap, hdr->addr2);
1313 if (sta)
1314 atomic_inc(&sta->users);
1315 spin_unlock_bh(&local->ap->sta_table_lock);
1316
1317 if (sta && sta->crypt)
1318 crypt = sta->crypt;
1319 else {
1320 int idx = 0;
1321 if (skb->len >= hdrlen + 3)
1322 idx = skb->data[hdrlen + 3] >> 6;
1323 crypt = local->crypt[idx];
1324 }
1325
1326 pos = (u16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
1327 auth_alg = __le16_to_cpu(*pos);
1328 pos++;
1329 auth_transaction = __le16_to_cpu(*pos);
1330 pos++;
1331 status_code = __le16_to_cpu(*pos);
1332 pos++;
1333
1334 if (memcmp(dev->dev_addr, hdr->addr2, ETH_ALEN) == 0 ||
1335 ap_control_mac_deny(&ap->mac_restrictions, hdr->addr2)) {
1336 txt = "authentication denied";
1337 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1338 goto fail;
1339 }
1340
1341 if (((local->auth_algs & PRISM2_AUTH_OPEN) &&
1342 auth_alg == WLAN_AUTH_OPEN) ||
1343 ((local->auth_algs & PRISM2_AUTH_SHARED_KEY) &&
1344 crypt && auth_alg == WLAN_AUTH_SHARED_KEY)) {
1345 } else {
1346 txt = "unsupported algorithm";
1347 resp = WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG;
1348 goto fail;
1349 }
1350
1351 if (len >= 8) {
1352 u8 *u = (u8 *) pos;
1353 if (*u == WLAN_EID_CHALLENGE) {
1354 if (*(u + 1) != WLAN_AUTH_CHALLENGE_LEN) {
1355 txt = "invalid challenge len";
1356 resp = WLAN_STATUS_CHALLENGE_FAIL;
1357 goto fail;
1358 }
1359 if (len - 8 < WLAN_AUTH_CHALLENGE_LEN) {
1360 txt = "challenge underflow";
1361 resp = WLAN_STATUS_CHALLENGE_FAIL;
1362 goto fail;
1363 }
1364 challenge = (char *) (u + 2);
1365 }
1366 }
1367
1368 if (sta && sta->ap) {
1369 if (time_after(jiffies, sta->u.ap.last_beacon +
1370 (10 * sta->listen_interval * HZ) / 1024)) {
1371 PDEBUG(DEBUG_AP, "%s: no beacons received for a while,"
1372 " assuming AP " MACSTR " is now STA\n",
1373 dev->name, MAC2STR(sta->addr));
1374 sta->ap = 0;
1375 sta->flags = 0;
1376 sta->u.sta.challenge = NULL;
1377 } else {
1378 txt = "AP trying to authenticate?";
1379 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1380 goto fail;
1381 }
1382 }
1383
1384 if ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 1) ||
1385 (auth_alg == WLAN_AUTH_SHARED_KEY &&
1386 (auth_transaction == 1 ||
1387 (auth_transaction == 3 && sta != NULL &&
1388 sta->u.sta.challenge != NULL)))) {
1389 } else {
1390 txt = "unknown authentication transaction number";
1391 resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION;
1392 goto fail;
1393 }
1394
1395 if (sta == NULL) {
1396 txt = "new STA";
1397
1398 if (local->ap->num_sta >= MAX_STA_COUNT) {
1399 /* FIX: might try to remove some old STAs first? */
1400 txt = "no more room for new STAs";
1401 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1402 goto fail;
1403 }
1404
1405 sta = ap_add_sta(local->ap, hdr->addr2);
1406 if (sta == NULL) {
1407 txt = "ap_add_sta failed";
1408 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1409 goto fail;
1410 }
1411 }
1412
1413 switch (auth_alg) {
1414 case WLAN_AUTH_OPEN:
1415 txt = "authOK";
1416 /* IEEE 802.11 standard is not completely clear about
1417 * whether STA is considered authenticated after
1418 * authentication OK frame has been send or after it
1419 * has been ACKed. In order to reduce interoperability
1420 * issues, mark the STA authenticated before ACK. */
1421 sta->flags |= WLAN_STA_AUTH;
1422 break;
1423
1424 case WLAN_AUTH_SHARED_KEY:
1425 if (auth_transaction == 1) {
1426 if (sta->u.sta.challenge == NULL) {
1427 sta->u.sta.challenge =
1428 ap_auth_make_challenge(local->ap);
1429 if (sta->u.sta.challenge == NULL) {
1430 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1431 goto fail;
1432 }
1433 }
1434 } else {
1435 if (sta->u.sta.challenge == NULL ||
1436 challenge == NULL ||
1437 memcmp(sta->u.sta.challenge, challenge,
1438 WLAN_AUTH_CHALLENGE_LEN) != 0 ||
1439 !(fc & IEEE80211_FCTL_PROTECTED)) {
1440 txt = "challenge response incorrect";
1441 resp = WLAN_STATUS_CHALLENGE_FAIL;
1442 goto fail;
1443 }
1444
1445 txt = "challenge OK - authOK";
1446 /* IEEE 802.11 standard is not completely clear about
1447 * whether STA is considered authenticated after
1448 * authentication OK frame has been send or after it
1449 * has been ACKed. In order to reduce interoperability
1450 * issues, mark the STA authenticated before ACK. */
1451 sta->flags |= WLAN_STA_AUTH;
1452 kfree(sta->u.sta.challenge);
1453 sta->u.sta.challenge = NULL;
1454 }
1455 break;
1456 }
1457
1458 fail:
1459 pos = (u16 *) body;
1460 *pos = cpu_to_le16(auth_alg);
1461 pos++;
1462 *pos = cpu_to_le16(auth_transaction + 1);
1463 pos++;
1464 *pos = cpu_to_le16(resp); /* status_code */
1465 pos++;
1466 olen = 6;
1467
1468 if (resp == WLAN_STATUS_SUCCESS && sta != NULL &&
1469 sta->u.sta.challenge != NULL &&
1470 auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 1) {
1471 u8 *tmp = (u8 *) pos;
1472 *tmp++ = WLAN_EID_CHALLENGE;
1473 *tmp++ = WLAN_AUTH_CHALLENGE_LEN;
1474 pos++;
1475 memcpy(pos, sta->u.sta.challenge, WLAN_AUTH_CHALLENGE_LEN);
1476 olen += 2 + WLAN_AUTH_CHALLENGE_LEN;
1477 }
1478
1479 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_AUTH,
1480 body, olen, hdr->addr2, ap->tx_callback_auth);
1481
1482 if (sta) {
1483 sta->last_rx = jiffies;
1484 atomic_dec(&sta->users);
1485 }
1486
1487 if (resp) {
1488 PDEBUG(DEBUG_AP, "%s: " MACSTR " auth (alg=%d trans#=%d "
1489 "stat=%d len=%d fc=%04x) ==> %d (%s)\n",
1490 dev->name, MAC2STR(hdr->addr2), auth_alg,
1491 auth_transaction, status_code, len, fc, resp, txt);
1492 }
1493 }
1494
1495
1496 /* Called only as a scheduled task for pending AP frames. */
1497 static void handle_assoc(local_info_t *local, struct sk_buff *skb,
1498 struct hostap_80211_rx_status *rx_stats, int reassoc)
1499 {
1500 struct net_device *dev = local->dev;
1501 struct ieee80211_hdr_4addr *hdr = (struct ieee80211_hdr_4addr *) skb->data;
1502 char body[12], *p, *lpos;
1503 int len, left;
1504 u16 *pos;
1505 u16 resp = WLAN_STATUS_SUCCESS;
1506 struct sta_info *sta = NULL;
1507 int send_deauth = 0;
1508 char *txt = "";
1509 u8 prev_ap[ETH_ALEN];
1510
1511 left = len = skb->len - IEEE80211_MGMT_HDR_LEN;
1512
1513 if (len < (reassoc ? 10 : 4)) {
1514 PDEBUG(DEBUG_AP, "%s: handle_assoc - too short payload "
1515 "(len=%d, reassoc=%d) from " MACSTR "\n",
1516 dev->name, len, reassoc, MAC2STR(hdr->addr2));
1517 return;
1518 }
1519
1520 spin_lock_bh(&local->ap->sta_table_lock);
1521 sta = ap_get_sta(local->ap, hdr->addr2);
1522 if (sta == NULL || (sta->flags & WLAN_STA_AUTH) == 0) {
1523 spin_unlock_bh(&local->ap->sta_table_lock);
1524 txt = "trying to associate before authentication";
1525 send_deauth = 1;
1526 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1527 sta = NULL; /* do not decrement sta->users */
1528 goto fail;
1529 }
1530 atomic_inc(&sta->users);
1531 spin_unlock_bh(&local->ap->sta_table_lock);
1532
1533 pos = (u16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
1534 sta->capability = __le16_to_cpu(*pos);
1535 pos++; left -= 2;
1536 sta->listen_interval = __le16_to_cpu(*pos);
1537 pos++; left -= 2;
1538
1539 if (reassoc) {
1540 memcpy(prev_ap, pos, ETH_ALEN);
1541 pos++; pos++; pos++; left -= 6;
1542 } else
1543 memset(prev_ap, 0, ETH_ALEN);
1544
1545 if (left >= 2) {
1546 unsigned int ileft;
1547 unsigned char *u = (unsigned char *) pos;
1548
1549 if (*u == WLAN_EID_SSID) {
1550 u++; left--;
1551 ileft = *u;
1552 u++; left--;
1553
1554 if (ileft > left || ileft > MAX_SSID_LEN) {
1555 txt = "SSID overflow";
1556 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1557 goto fail;
1558 }
1559
1560 if (ileft != strlen(local->essid) ||
1561 memcmp(local->essid, u, ileft) != 0) {
1562 txt = "not our SSID";
1563 resp = WLAN_STATUS_ASSOC_DENIED_UNSPEC;
1564 goto fail;
1565 }
1566
1567 u += ileft;
1568 left -= ileft;
1569 }
1570
1571 if (left >= 2 && *u == WLAN_EID_SUPP_RATES) {
1572 u++; left--;
1573 ileft = *u;
1574 u++; left--;
1575
1576 if (ileft > left || ileft == 0 ||
1577 ileft > WLAN_SUPP_RATES_MAX) {
1578 txt = "SUPP_RATES len error";
1579 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1580 goto fail;
1581 }
1582
1583 memset(sta->supported_rates, 0,
1584 sizeof(sta->supported_rates));
1585 memcpy(sta->supported_rates, u, ileft);
1586 prism2_check_tx_rates(sta);
1587
1588 u += ileft;
1589 left -= ileft;
1590 }
1591
1592 if (left > 0) {
1593 PDEBUG(DEBUG_AP, "%s: assoc from " MACSTR " with extra"
1594 " data (%d bytes) [",
1595 dev->name, MAC2STR(hdr->addr2), left);
1596 while (left > 0) {
1597 PDEBUG2(DEBUG_AP, "<%02x>", *u);
1598 u++; left--;
1599 }
1600 PDEBUG2(DEBUG_AP, "]\n");
1601 }
1602 } else {
1603 txt = "frame underflow";
1604 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1605 goto fail;
1606 }
1607
1608 /* get a unique AID */
1609 if (sta->aid > 0)
1610 txt = "OK, old AID";
1611 else {
1612 spin_lock_bh(&local->ap->sta_table_lock);
1613 for (sta->aid = 1; sta->aid <= MAX_AID_TABLE_SIZE; sta->aid++)
1614 if (local->ap->sta_aid[sta->aid - 1] == NULL)
1615 break;
1616 if (sta->aid > MAX_AID_TABLE_SIZE) {
1617 sta->aid = 0;
1618 spin_unlock_bh(&local->ap->sta_table_lock);
1619 resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
1620 txt = "no room for more AIDs";
1621 } else {
1622 local->ap->sta_aid[sta->aid - 1] = sta;
1623 spin_unlock_bh(&local->ap->sta_table_lock);
1624 txt = "OK, new AID";
1625 }
1626 }
1627
1628 fail:
1629 pos = (u16 *) body;
1630
1631 if (send_deauth) {
1632 *pos = __constant_cpu_to_le16(
1633 WLAN_REASON_STA_REQ_ASSOC_WITHOUT_AUTH);
1634 pos++;
1635 } else {
1636 /* FIX: CF-Pollable and CF-PollReq should be set to match the
1637 * values in beacons/probe responses */
1638 /* FIX: how about privacy and WEP? */
1639 /* capability */
1640 *pos = __constant_cpu_to_le16(WLAN_CAPABILITY_ESS);
1641 pos++;
1642
1643 /* status_code */
1644 *pos = __cpu_to_le16(resp);
1645 pos++;
1646
1647 *pos = __cpu_to_le16((sta && sta->aid > 0 ? sta->aid : 0) |
1648 BIT(14) | BIT(15)); /* AID */
1649 pos++;
1650
1651 /* Supported rates (Information element) */
1652 p = (char *) pos;
1653 *p++ = WLAN_EID_SUPP_RATES;
1654 lpos = p;
1655 *p++ = 0; /* len */
1656 if (local->tx_rate_control & WLAN_RATE_1M) {
1657 *p++ = local->basic_rates & WLAN_RATE_1M ? 0x82 : 0x02;
1658 (*lpos)++;
1659 }
1660 if (local->tx_rate_control & WLAN_RATE_2M) {
1661 *p++ = local->basic_rates & WLAN_RATE_2M ? 0x84 : 0x04;
1662 (*lpos)++;
1663 }
1664 if (local->tx_rate_control & WLAN_RATE_5M5) {
1665 *p++ = local->basic_rates & WLAN_RATE_5M5 ?
1666 0x8b : 0x0b;
1667 (*lpos)++;
1668 }
1669 if (local->tx_rate_control & WLAN_RATE_11M) {
1670 *p++ = local->basic_rates & WLAN_RATE_11M ?
1671 0x96 : 0x16;
1672 (*lpos)++;
1673 }
1674 pos = (u16 *) p;
1675 }
1676
1677 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT |
1678 (send_deauth ? IEEE80211_STYPE_DEAUTH :
1679 (reassoc ? IEEE80211_STYPE_REASSOC_RESP :
1680 IEEE80211_STYPE_ASSOC_RESP)),
1681 body, (u8 *) pos - (u8 *) body,
1682 hdr->addr2,
1683 send_deauth ? 0 : local->ap->tx_callback_assoc);
1684
1685 if (sta) {
1686 if (resp == WLAN_STATUS_SUCCESS) {
1687 sta->last_rx = jiffies;
1688 /* STA will be marked associated from TX callback, if
1689 * AssocResp is ACKed */
1690 }
1691 atomic_dec(&sta->users);
1692 }
1693
1694 #if 0
1695 PDEBUG(DEBUG_AP, "%s: " MACSTR " %sassoc (len=%d prev_ap=" MACSTR
1696 ") => %d(%d) (%s)\n",
1697 dev->name, MAC2STR(hdr->addr2), reassoc ? "re" : "", len,
1698 MAC2STR(prev_ap), resp, send_deauth, txt);
1699 #endif
1700 }
1701
1702
1703 /* Called only as a scheduled task for pending AP frames. */
1704 static void handle_deauth(local_info_t *local, struct sk_buff *skb,
1705 struct hostap_80211_rx_status *rx_stats)
1706 {
1707 struct net_device *dev = local->dev;
1708 struct ieee80211_hdr_4addr *hdr = (struct ieee80211_hdr_4addr *) skb->data;
1709 char *body = (char *) (skb->data + IEEE80211_MGMT_HDR_LEN);
1710 int len;
1711 u16 reason_code, *pos;
1712 struct sta_info *sta = NULL;
1713
1714 len = skb->len - IEEE80211_MGMT_HDR_LEN;
1715
1716 if (len < 2) {
1717 printk("handle_deauth - too short payload (len=%d)\n", len);
1718 return;
1719 }
1720
1721 pos = (u16 *) body;
1722 reason_code = __le16_to_cpu(*pos);
1723
1724 PDEBUG(DEBUG_AP, "%s: deauthentication: " MACSTR " len=%d, "
1725 "reason_code=%d\n", dev->name, MAC2STR(hdr->addr2), len,
1726 reason_code);
1727
1728 spin_lock_bh(&local->ap->sta_table_lock);
1729 sta = ap_get_sta(local->ap, hdr->addr2);
1730 if (sta != NULL) {
1731 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap)
1732 hostap_event_expired_sta(local->dev, sta);
1733 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
1734 }
1735 spin_unlock_bh(&local->ap->sta_table_lock);
1736 if (sta == NULL) {
1737 printk("%s: deauthentication from " MACSTR ", "
1738 "reason_code=%d, but STA not authenticated\n", dev->name,
1739 MAC2STR(hdr->addr2), reason_code);
1740 }
1741 }
1742
1743
1744 /* Called only as a scheduled task for pending AP frames. */
1745 static void handle_disassoc(local_info_t *local, struct sk_buff *skb,
1746 struct hostap_80211_rx_status *rx_stats)
1747 {
1748 struct net_device *dev = local->dev;
1749 struct ieee80211_hdr_4addr *hdr = (struct ieee80211_hdr_4addr *) skb->data;
1750 char *body = skb->data + IEEE80211_MGMT_HDR_LEN;
1751 int len;
1752 u16 reason_code, *pos;
1753 struct sta_info *sta = NULL;
1754
1755 len = skb->len - IEEE80211_MGMT_HDR_LEN;
1756
1757 if (len < 2) {
1758 printk("handle_disassoc - too short payload (len=%d)\n", len);
1759 return;
1760 }
1761
1762 pos = (u16 *) body;
1763 reason_code = __le16_to_cpu(*pos);
1764
1765 PDEBUG(DEBUG_AP, "%s: disassociation: " MACSTR " len=%d, "
1766 "reason_code=%d\n", dev->name, MAC2STR(hdr->addr2), len,
1767 reason_code);
1768
1769 spin_lock_bh(&local->ap->sta_table_lock);
1770 sta = ap_get_sta(local->ap, hdr->addr2);
1771 if (sta != NULL) {
1772 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap)
1773 hostap_event_expired_sta(local->dev, sta);
1774 sta->flags &= ~WLAN_STA_ASSOC;
1775 }
1776 spin_unlock_bh(&local->ap->sta_table_lock);
1777 if (sta == NULL) {
1778 printk("%s: disassociation from " MACSTR ", "
1779 "reason_code=%d, but STA not authenticated\n",
1780 dev->name, MAC2STR(hdr->addr2), reason_code);
1781 }
1782 }
1783
1784
1785 /* Called only as a scheduled task for pending AP frames. */
1786 static void ap_handle_data_nullfunc(local_info_t *local,
1787 struct ieee80211_hdr_4addr *hdr)
1788 {
1789 struct net_device *dev = local->dev;
1790
1791 /* some STA f/w's seem to require control::ACK frame for
1792 * data::nullfunc, but at least Prism2 station f/w version 0.8.0 does
1793 * not send this..
1794 * send control::ACK for the data::nullfunc */
1795
1796 printk(KERN_DEBUG "Sending control::ACK for data::nullfunc\n");
1797 prism2_send_mgmt(dev, IEEE80211_FTYPE_CTL | IEEE80211_STYPE_ACK,
1798 NULL, 0, hdr->addr2, 0);
1799 }
1800
1801
1802 /* Called only as a scheduled task for pending AP frames. */
1803 static void ap_handle_dropped_data(local_info_t *local,
1804 struct ieee80211_hdr_4addr *hdr)
1805 {
1806 struct net_device *dev = local->dev;
1807 struct sta_info *sta;
1808 u16 reason;
1809
1810 spin_lock_bh(&local->ap->sta_table_lock);
1811 sta = ap_get_sta(local->ap, hdr->addr2);
1812 if (sta)
1813 atomic_inc(&sta->users);
1814 spin_unlock_bh(&local->ap->sta_table_lock);
1815
1816 if (sta != NULL && (sta->flags & WLAN_STA_ASSOC)) {
1817 PDEBUG(DEBUG_AP, "ap_handle_dropped_data: STA is now okay?\n");
1818 atomic_dec(&sta->users);
1819 return;
1820 }
1821
1822 reason = __constant_cpu_to_le16(
1823 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
1824 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT |
1825 ((sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) ?
1826 IEEE80211_STYPE_DEAUTH : IEEE80211_STYPE_DISASSOC),
1827 (char *) &reason, sizeof(reason), hdr->addr2, 0);
1828
1829 if (sta)
1830 atomic_dec(&sta->users);
1831 }
1832
1833 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1834
1835
1836 /* Called only as a scheduled task for pending AP frames. */
1837 static void pspoll_send_buffered(local_info_t *local, struct sta_info *sta,
1838 struct sk_buff *skb)
1839 {
1840 struct hostap_skb_tx_data *meta;
1841
1842 if (!(sta->flags & WLAN_STA_PS)) {
1843 /* Station has moved to non-PS mode, so send all buffered
1844 * frames using normal device queue. */
1845 dev_queue_xmit(skb);
1846 return;
1847 }
1848
1849 /* add a flag for hostap_handle_sta_tx() to know that this skb should
1850 * be passed through even though STA is using PS */
1851 meta = (struct hostap_skb_tx_data *) skb->cb;
1852 meta->flags |= HOSTAP_TX_FLAGS_BUFFERED_FRAME;
1853 if (!skb_queue_empty(&sta->tx_buf)) {
1854 /* indicate to STA that more frames follow */
1855 meta->flags |= HOSTAP_TX_FLAGS_ADD_MOREDATA;
1856 }
1857 dev_queue_xmit(skb);
1858 }
1859
1860
1861 /* Called only as a scheduled task for pending AP frames. */
1862 static void handle_pspoll(local_info_t *local,
1863 struct ieee80211_hdr_4addr *hdr,
1864 struct hostap_80211_rx_status *rx_stats)
1865 {
1866 struct net_device *dev = local->dev;
1867 struct sta_info *sta;
1868 u16 aid;
1869 struct sk_buff *skb;
1870
1871 PDEBUG(DEBUG_PS2, "handle_pspoll: BSSID=" MACSTR ", TA=" MACSTR
1872 " PWRMGT=%d\n",
1873 MAC2STR(hdr->addr1), MAC2STR(hdr->addr2),
1874 !!(le16_to_cpu(hdr->frame_ctl) & IEEE80211_FCTL_PM));
1875
1876 if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN)) {
1877 PDEBUG(DEBUG_AP, "handle_pspoll - addr1(BSSID)=" MACSTR
1878 " not own MAC\n", MAC2STR(hdr->addr1));
1879 return;
1880 }
1881
1882 aid = __le16_to_cpu(hdr->duration_id);
1883 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) {
1884 PDEBUG(DEBUG_PS, " PSPOLL and AID[15:14] not set\n");
1885 return;
1886 }
1887 aid &= ~BIT(15) & ~BIT(14);
1888 if (aid == 0 || aid > MAX_AID_TABLE_SIZE) {
1889 PDEBUG(DEBUG_PS, " invalid aid=%d\n", aid);
1890 return;
1891 }
1892 PDEBUG(DEBUG_PS2, " aid=%d\n", aid);
1893
1894 spin_lock_bh(&local->ap->sta_table_lock);
1895 sta = ap_get_sta(local->ap, hdr->addr2);
1896 if (sta)
1897 atomic_inc(&sta->users);
1898 spin_unlock_bh(&local->ap->sta_table_lock);
1899
1900 if (sta == NULL) {
1901 PDEBUG(DEBUG_PS, " STA not found\n");
1902 return;
1903 }
1904 if (sta->aid != aid) {
1905 PDEBUG(DEBUG_PS, " received aid=%i does not match with "
1906 "assoc.aid=%d\n", aid, sta->aid);
1907 return;
1908 }
1909
1910 /* FIX: todo:
1911 * - add timeout for buffering (clear aid in TIM vector if buffer timed
1912 * out (expiry time must be longer than ListenInterval for
1913 * the corresponding STA; "8802-11: 11.2.1.9 AP aging function"
1914 * - what to do, if buffered, pspolled, and sent frame is not ACKed by
1915 * sta; store buffer for later use and leave TIM aid bit set? use
1916 * TX event to check whether frame was ACKed?
1917 */
1918
1919 while ((skb = skb_dequeue(&sta->tx_buf)) != NULL) {
1920 /* send buffered frame .. */
1921 PDEBUG(DEBUG_PS2, "Sending buffered frame to STA after PS POLL"
1922 " (buffer_count=%d)\n", skb_queue_len(&sta->tx_buf));
1923
1924 pspoll_send_buffered(local, sta, skb);
1925
1926 if (sta->flags & WLAN_STA_PS) {
1927 /* send only one buffered packet per PS Poll */
1928 /* FIX: should ignore further PS Polls until the
1929 * buffered packet that was just sent is acknowledged
1930 * (Tx or TxExc event) */
1931 break;
1932 }
1933 }
1934
1935 if (skb_queue_empty(&sta->tx_buf)) {
1936 /* try to clear aid from TIM */
1937 if (!(sta->flags & WLAN_STA_TIM))
1938 PDEBUG(DEBUG_PS2, "Re-unsetting TIM for aid %d\n",
1939 aid);
1940 hostap_set_tim(local, aid, 0);
1941 sta->flags &= ~WLAN_STA_TIM;
1942 }
1943
1944 atomic_dec(&sta->users);
1945 }
1946
1947
1948 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1949
1950 static void handle_wds_oper_queue(void *data)
1951 {
1952 local_info_t *local = data;
1953 struct wds_oper_data *entry, *prev;
1954
1955 spin_lock_bh(&local->lock);
1956 entry = local->ap->wds_oper_entries;
1957 local->ap->wds_oper_entries = NULL;
1958 spin_unlock_bh(&local->lock);
1959
1960 while (entry) {
1961 PDEBUG(DEBUG_AP, "%s: %s automatic WDS connection "
1962 "to AP " MACSTR "\n",
1963 local->dev->name,
1964 entry->type == WDS_ADD ? "adding" : "removing",
1965 MAC2STR(entry->addr));
1966 if (entry->type == WDS_ADD)
1967 prism2_wds_add(local, entry->addr, 0);
1968 else if (entry->type == WDS_DEL)
1969 prism2_wds_del(local, entry->addr, 0, 1);
1970
1971 prev = entry;
1972 entry = entry->next;
1973 kfree(prev);
1974 }
1975 }
1976
1977
1978 /* Called only as a scheduled task for pending AP frames. */
1979 static void handle_beacon(local_info_t *local, struct sk_buff *skb,
1980 struct hostap_80211_rx_status *rx_stats)
1981 {
1982 struct ieee80211_hdr_4addr *hdr = (struct ieee80211_hdr_4addr *) skb->data;
1983 char *body = skb->data + IEEE80211_MGMT_HDR_LEN;
1984 int len, left;
1985 u16 *pos, beacon_int, capability;
1986 char *ssid = NULL;
1987 unsigned char *supp_rates = NULL;
1988 int ssid_len = 0, supp_rates_len = 0;
1989 struct sta_info *sta = NULL;
1990 int new_sta = 0, channel = -1;
1991
1992 len = skb->len - IEEE80211_MGMT_HDR_LEN;
1993
1994 if (len < 8 + 2 + 2) {
1995 printk(KERN_DEBUG "handle_beacon - too short payload "
1996 "(len=%d)\n", len);
1997 return;
1998 }
1999
2000 pos = (u16 *) body;
2001 left = len;
2002
2003 /* Timestamp (8 octets) */
2004 pos += 4; left -= 8;
2005 /* Beacon interval (2 octets) */
2006 beacon_int = __le16_to_cpu(*pos);
2007 pos++; left -= 2;
2008 /* Capability information (2 octets) */
2009 capability = __le16_to_cpu(*pos);
2010 pos++; left -= 2;
2011
2012 if (local->ap->ap_policy != AP_OTHER_AP_EVEN_IBSS &&
2013 capability & WLAN_CAPABILITY_IBSS)
2014 return;
2015
2016 if (left >= 2) {
2017 unsigned int ileft;
2018 unsigned char *u = (unsigned char *) pos;
2019
2020 if (*u == WLAN_EID_SSID) {
2021 u++; left--;
2022 ileft = *u;
2023 u++; left--;
2024
2025 if (ileft > left || ileft > MAX_SSID_LEN) {
2026 PDEBUG(DEBUG_AP, "SSID: overflow\n");
2027 return;
2028 }
2029
2030 if (local->ap->ap_policy == AP_OTHER_AP_SAME_SSID &&
2031 (ileft != strlen(local->essid) ||
2032 memcmp(local->essid, u, ileft) != 0)) {
2033 /* not our SSID */
2034 return;
2035 }
2036
2037 ssid = u;
2038 ssid_len = ileft;
2039
2040 u += ileft;
2041 left -= ileft;
2042 }
2043
2044 if (*u == WLAN_EID_SUPP_RATES) {
2045 u++; left--;
2046 ileft = *u;
2047 u++; left--;
2048
2049 if (ileft > left || ileft == 0 || ileft > 8) {
2050 PDEBUG(DEBUG_AP, " - SUPP_RATES len error\n");
2051 return;
2052 }
2053
2054 supp_rates = u;
2055 supp_rates_len = ileft;
2056
2057 u += ileft;
2058 left -= ileft;
2059 }
2060
2061 if (*u == WLAN_EID_DS_PARAMS) {
2062 u++; left--;
2063 ileft = *u;
2064 u++; left--;
2065
2066 if (ileft > left || ileft != 1) {
2067 PDEBUG(DEBUG_AP, " - DS_PARAMS len error\n");
2068 return;
2069 }
2070
2071 channel = *u;
2072
2073 u += ileft;
2074 left -= ileft;
2075 }
2076 }
2077
2078 spin_lock_bh(&local->ap->sta_table_lock);
2079 sta = ap_get_sta(local->ap, hdr->addr2);
2080 if (sta != NULL)
2081 atomic_inc(&sta->users);
2082 spin_unlock_bh(&local->ap->sta_table_lock);
2083
2084 if (sta == NULL) {
2085 /* add new AP */
2086 new_sta = 1;
2087 sta = ap_add_sta(local->ap, hdr->addr2);
2088 if (sta == NULL) {
2089 printk(KERN_INFO "prism2: kmalloc failed for AP "
2090 "data structure\n");
2091 return;
2092 }
2093 hostap_event_new_sta(local->dev, sta);
2094
2095 /* mark APs authentication and associated for pseudo ad-hoc
2096 * style communication */
2097 sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
2098
2099 if (local->ap->autom_ap_wds) {
2100 hostap_wds_link_oper(local, sta->addr, WDS_ADD);
2101 }
2102 }
2103
2104 sta->ap = 1;
2105 if (ssid) {
2106 sta->u.ap.ssid_len = ssid_len;
2107 memcpy(sta->u.ap.ssid, ssid, ssid_len);
2108 sta->u.ap.ssid[ssid_len] = '\0';
2109 } else {
2110 sta->u.ap.ssid_len = 0;
2111 sta->u.ap.ssid[0] = '\0';
2112 }
2113 sta->u.ap.channel = channel;
2114 sta->rx_packets++;
2115 sta->rx_bytes += len;
2116 sta->u.ap.last_beacon = sta->last_rx = jiffies;
2117 sta->capability = capability;
2118 sta->listen_interval = beacon_int;
2119
2120 atomic_dec(&sta->users);
2121
2122 if (new_sta) {
2123 memset(sta->supported_rates, 0, sizeof(sta->supported_rates));
2124 memcpy(sta->supported_rates, supp_rates, supp_rates_len);
2125 prism2_check_tx_rates(sta);
2126 }
2127 }
2128
2129 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2130
2131
2132 /* Called only as a tasklet. */
2133 static void handle_ap_item(local_info_t *local, struct sk_buff *skb,
2134 struct hostap_80211_rx_status *rx_stats)
2135 {
2136 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2137 struct net_device *dev = local->dev;
2138 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2139 u16 fc, type, stype;
2140 struct ieee80211_hdr_4addr *hdr;
2141
2142 /* FIX: should give skb->len to handler functions and check that the
2143 * buffer is long enough */
2144 hdr = (struct ieee80211_hdr_4addr *) skb->data;
2145 fc = le16_to_cpu(hdr->frame_ctl);
2146 type = WLAN_FC_GET_TYPE(fc);
2147 stype = WLAN_FC_GET_STYPE(fc);
2148
2149 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2150 if (!local->hostapd && type == IEEE80211_FTYPE_DATA) {
2151 PDEBUG(DEBUG_AP, "handle_ap_item - data frame\n");
2152
2153 if (!(fc & IEEE80211_FCTL_TODS) ||
2154 (fc & IEEE80211_FCTL_FROMDS)) {
2155 if (stype == IEEE80211_STYPE_NULLFUNC) {
2156 /* no ToDS nullfunc seems to be used to check
2157 * AP association; so send reject message to
2158 * speed up re-association */
2159 ap_handle_dropped_data(local, hdr);
2160 goto done;
2161 }
2162 PDEBUG(DEBUG_AP, " not ToDS frame (fc=0x%04x)\n",
2163 fc);
2164 goto done;
2165 }
2166
2167 if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN)) {
2168 PDEBUG(DEBUG_AP, "handle_ap_item - addr1(BSSID)="
2169 MACSTR " not own MAC\n",
2170 MAC2STR(hdr->addr1));
2171 goto done;
2172 }
2173
2174 if (local->ap->nullfunc_ack &&
2175 stype == IEEE80211_STYPE_NULLFUNC)
2176 ap_handle_data_nullfunc(local, hdr);
2177 else
2178 ap_handle_dropped_data(local, hdr);
2179 goto done;
2180 }
2181
2182 if (type == IEEE80211_FTYPE_MGMT && stype == IEEE80211_STYPE_BEACON) {
2183 handle_beacon(local, skb, rx_stats);
2184 goto done;
2185 }
2186 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2187
2188 if (type == IEEE80211_FTYPE_CTL && stype == IEEE80211_STYPE_PSPOLL) {
2189 handle_pspoll(local, hdr, rx_stats);
2190 goto done;
2191 }
2192
2193 if (local->hostapd) {
2194 PDEBUG(DEBUG_AP, "Unknown frame in AP queue: type=0x%02x "
2195 "subtype=0x%02x\n", type, stype);
2196 goto done;
2197 }
2198
2199 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2200 if (type != IEEE80211_FTYPE_MGMT) {
2201 PDEBUG(DEBUG_AP, "handle_ap_item - not a management frame?\n");
2202 goto done;
2203 }
2204
2205 if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN)) {
2206 PDEBUG(DEBUG_AP, "handle_ap_item - addr1(DA)=" MACSTR
2207 " not own MAC\n", MAC2STR(hdr->addr1));
2208 goto done;
2209 }
2210
2211 if (memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN)) {
2212 PDEBUG(DEBUG_AP, "handle_ap_item - addr3(BSSID)=" MACSTR
2213 " not own MAC\n", MAC2STR(hdr->addr3));
2214 goto done;
2215 }
2216
2217 switch (stype) {
2218 case IEEE80211_STYPE_ASSOC_REQ:
2219 handle_assoc(local, skb, rx_stats, 0);
2220 break;
2221 case IEEE80211_STYPE_ASSOC_RESP:
2222 PDEBUG(DEBUG_AP, "==> ASSOC RESP (ignored)\n");
2223 break;
2224 case IEEE80211_STYPE_REASSOC_REQ:
2225 handle_assoc(local, skb, rx_stats, 1);
2226 break;
2227 case IEEE80211_STYPE_REASSOC_RESP:
2228 PDEBUG(DEBUG_AP, "==> REASSOC RESP (ignored)\n");
2229 break;
2230 case IEEE80211_STYPE_ATIM:
2231 PDEBUG(DEBUG_AP, "==> ATIM (ignored)\n");
2232 break;
2233 case IEEE80211_STYPE_DISASSOC:
2234 handle_disassoc(local, skb, rx_stats);
2235 break;
2236 case IEEE80211_STYPE_AUTH:
2237 handle_authen(local, skb, rx_stats);
2238 break;
2239 case IEEE80211_STYPE_DEAUTH:
2240 handle_deauth(local, skb, rx_stats);
2241 break;
2242 default:
2243 PDEBUG(DEBUG_AP, "Unknown mgmt frame subtype 0x%02x\n",
2244 stype >> 4);
2245 break;
2246 }
2247 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2248
2249 done:
2250 dev_kfree_skb(skb);
2251 }
2252
2253
2254 /* Called only as a tasklet (software IRQ) */
2255 void hostap_rx(struct net_device *dev, struct sk_buff *skb,
2256 struct hostap_80211_rx_status *rx_stats)
2257 {
2258 struct hostap_interface *iface;
2259 local_info_t *local;
2260 u16 fc;
2261 struct ieee80211_hdr_4addr *hdr;
2262
2263 iface = netdev_priv(dev);
2264 local = iface->local;
2265
2266 if (skb->len < 16)
2267 goto drop;
2268
2269 local->stats.rx_packets++;
2270
2271 hdr = (struct ieee80211_hdr_4addr *) skb->data;
2272 fc = le16_to_cpu(hdr->frame_ctl);
2273
2274 if (local->ap->ap_policy == AP_OTHER_AP_SKIP_ALL &&
2275 WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_MGMT &&
2276 WLAN_FC_GET_STYPE(fc) == IEEE80211_STYPE_BEACON)
2277 goto drop;
2278
2279 skb->protocol = __constant_htons(ETH_P_HOSTAP);
2280 handle_ap_item(local, skb, rx_stats);
2281 return;
2282
2283 drop:
2284 dev_kfree_skb(skb);
2285 }
2286
2287
2288 /* Called only as a tasklet (software IRQ) */
2289 static void schedule_packet_send(local_info_t *local, struct sta_info *sta)
2290 {
2291 struct sk_buff *skb;
2292 struct ieee80211_hdr_4addr *hdr;
2293 struct hostap_80211_rx_status rx_stats;
2294
2295 if (skb_queue_empty(&sta->tx_buf))
2296 return;
2297
2298 skb = dev_alloc_skb(16);
2299 if (skb == NULL) {
2300 printk(KERN_DEBUG "%s: schedule_packet_send: skb alloc "
2301 "failed\n", local->dev->name);
2302 return;
2303 }
2304
2305 hdr = (struct ieee80211_hdr_4addr *) skb_put(skb, 16);
2306
2307 /* Generate a fake pspoll frame to start packet delivery */
2308 hdr->frame_ctl = __constant_cpu_to_le16(
2309 IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL);
2310 memcpy(hdr->addr1, local->dev->dev_addr, ETH_ALEN);
2311 memcpy(hdr->addr2, sta->addr, ETH_ALEN);
2312 hdr->duration_id = cpu_to_le16(sta->aid | BIT(15) | BIT(14));
2313
2314 PDEBUG(DEBUG_PS2, "%s: Scheduling buffered packet delivery for "
2315 "STA " MACSTR "\n", local->dev->name, MAC2STR(sta->addr));
2316
2317 skb->dev = local->dev;
2318
2319 memset(&rx_stats, 0, sizeof(rx_stats));
2320 hostap_rx(local->dev, skb, &rx_stats);
2321 }
2322
2323
2324 static int prism2_ap_get_sta_qual(local_info_t *local, struct sockaddr addr[],
2325 struct iw_quality qual[], int buf_size,
2326 int aplist)
2327 {
2328 struct ap_data *ap = local->ap;
2329 struct list_head *ptr;
2330 int count = 0;
2331
2332 spin_lock_bh(&ap->sta_table_lock);
2333
2334 for (ptr = ap->sta_list.next; ptr != NULL && ptr != &ap->sta_list;
2335 ptr = ptr->next) {
2336 struct sta_info *sta = (struct sta_info *) ptr;
2337
2338 if (aplist && !sta->ap)
2339 continue;
2340 addr[count].sa_family = ARPHRD_ETHER;
2341 memcpy(addr[count].sa_data, sta->addr, ETH_ALEN);
2342 if (sta->last_rx_silence == 0)
2343 qual[count].qual = sta->last_rx_signal < 27 ?
2344 0 : (sta->last_rx_signal - 27) * 92 / 127;
2345 else
2346 qual[count].qual = sta->last_rx_signal -
2347 sta->last_rx_silence - 35;
2348 qual[count].level = HFA384X_LEVEL_TO_dBm(sta->last_rx_signal);
2349 qual[count].noise = HFA384X_LEVEL_TO_dBm(sta->last_rx_silence);
2350 qual[count].updated = sta->last_rx_updated;
2351
2352 sta->last_rx_updated = IW_QUAL_DBM;
2353
2354 count++;
2355 if (count >= buf_size)
2356 break;
2357 }
2358 spin_unlock_bh(&ap->sta_table_lock);
2359
2360 return count;
2361 }
2362
2363
2364 /* Translate our list of Access Points & Stations to a card independant
2365 * format that the Wireless Tools will understand - Jean II */
2366 static int prism2_ap_translate_scan(struct net_device *dev, char *buffer)
2367 {
2368 struct hostap_interface *iface;
2369 local_info_t *local;
2370 struct ap_data *ap;
2371 struct list_head *ptr;
2372 struct iw_event iwe;
2373 char *current_ev = buffer;
2374 char *end_buf = buffer + IW_SCAN_MAX_DATA;
2375 #if !defined(PRISM2_NO_KERNEL_IEEE80211_MGMT)
2376 char buf[64];
2377 #endif
2378
2379 iface = netdev_priv(dev);
2380 local = iface->local;
2381 ap = local->ap;
2382
2383 spin_lock_bh(&ap->sta_table_lock);
2384
2385 for (ptr = ap->sta_list.next; ptr != NULL && ptr != &ap->sta_list;
2386 ptr = ptr->next) {
2387 struct sta_info *sta = (struct sta_info *) ptr;
2388
2389 /* First entry *MUST* be the AP MAC address */
2390 memset(&iwe, 0, sizeof(iwe));
2391 iwe.cmd = SIOCGIWAP;
2392 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
2393 memcpy(iwe.u.ap_addr.sa_data, sta->addr, ETH_ALEN);
2394 iwe.len = IW_EV_ADDR_LEN;
2395 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2396 IW_EV_ADDR_LEN);
2397
2398 /* Use the mode to indicate if it's a station or
2399 * an Access Point */
2400 memset(&iwe, 0, sizeof(iwe));
2401 iwe.cmd = SIOCGIWMODE;
2402 if (sta->ap)
2403 iwe.u.mode = IW_MODE_MASTER;
2404 else
2405 iwe.u.mode = IW_MODE_INFRA;
2406 iwe.len = IW_EV_UINT_LEN;
2407 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2408 IW_EV_UINT_LEN);
2409
2410 /* Some quality */
2411 memset(&iwe, 0, sizeof(iwe));
2412 iwe.cmd = IWEVQUAL;
2413 if (sta->last_rx_silence == 0)
2414 iwe.u.qual.qual = sta->last_rx_signal < 27 ?
2415 0 : (sta->last_rx_signal - 27) * 92 / 127;
2416 else
2417 iwe.u.qual.qual = sta->last_rx_signal -
2418 sta->last_rx_silence - 35;
2419 iwe.u.qual.level = HFA384X_LEVEL_TO_dBm(sta->last_rx_signal);
2420 iwe.u.qual.noise = HFA384X_LEVEL_TO_dBm(sta->last_rx_silence);
2421 iwe.u.qual.updated = sta->last_rx_updated;
2422 iwe.len = IW_EV_QUAL_LEN;
2423 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2424 IW_EV_QUAL_LEN);
2425
2426 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2427 if (sta->ap) {
2428 memset(&iwe, 0, sizeof(iwe));
2429 iwe.cmd = SIOCGIWESSID;
2430 iwe.u.data.length = sta->u.ap.ssid_len;
2431 iwe.u.data.flags = 1;
2432 current_ev = iwe_stream_add_point(current_ev, end_buf,
2433 &iwe,
2434 sta->u.ap.ssid);
2435
2436 memset(&iwe, 0, sizeof(iwe));
2437 iwe.cmd = SIOCGIWENCODE;
2438 if (sta->capability & WLAN_CAPABILITY_PRIVACY)
2439 iwe.u.data.flags =
2440 IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
2441 else
2442 iwe.u.data.flags = IW_ENCODE_DISABLED;
2443 current_ev = iwe_stream_add_point(current_ev, end_buf,
2444 &iwe,
2445 sta->u.ap.ssid
2446 /* 0 byte memcpy */);
2447
2448 if (sta->u.ap.channel > 0 &&
2449 sta->u.ap.channel <= FREQ_COUNT) {
2450 memset(&iwe, 0, sizeof(iwe));
2451 iwe.cmd = SIOCGIWFREQ;
2452 iwe.u.freq.m = freq_list[sta->u.ap.channel - 1]
2453 * 100000;
2454 iwe.u.freq.e = 1;
2455 current_ev = iwe_stream_add_event(
2456 current_ev, end_buf, &iwe,
2457 IW_EV_FREQ_LEN);
2458 }
2459
2460 memset(&iwe, 0, sizeof(iwe));
2461 iwe.cmd = IWEVCUSTOM;
2462 sprintf(buf, "beacon_interval=%d",
2463 sta->listen_interval);
2464 iwe.u.data.length = strlen(buf);
2465 current_ev = iwe_stream_add_point(current_ev, end_buf,
2466 &iwe, buf);
2467 }
2468 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2469
2470 sta->last_rx_updated = IW_QUAL_DBM;
2471
2472 /* To be continued, we should make good use of IWEVCUSTOM */
2473 }
2474
2475 spin_unlock_bh(&ap->sta_table_lock);
2476
2477 return current_ev - buffer;
2478 }
2479
2480
2481 static int prism2_hostapd_add_sta(struct ap_data *ap,
2482 struct prism2_hostapd_param *param)
2483 {
2484 struct sta_info *sta;
2485
2486 spin_lock_bh(&ap->sta_table_lock);
2487 sta = ap_get_sta(ap, param->sta_addr);
2488 if (sta)
2489 atomic_inc(&sta->users);
2490 spin_unlock_bh(&ap->sta_table_lock);
2491
2492 if (sta == NULL) {
2493 sta = ap_add_sta(ap, param->sta_addr);
2494 if (sta == NULL)
2495 return -1;
2496 }
2497
2498 if (!(sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
2499 hostap_event_new_sta(sta->local->dev, sta);
2500
2501 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC;
2502 sta->last_rx = jiffies;
2503 sta->aid = param->u.add_sta.aid;
2504 sta->capability = param->u.add_sta.capability;
2505 sta->tx_supp_rates = param->u.add_sta.tx_supp_rates;
2506 if (sta->tx_supp_rates & WLAN_RATE_1M)
2507 sta->supported_rates[0] = 2;
2508 if (sta->tx_supp_rates & WLAN_RATE_2M)
2509 sta->supported_rates[1] = 4;
2510 if (sta->tx_supp_rates & WLAN_RATE_5M5)
2511 sta->supported_rates[2] = 11;
2512 if (sta->tx_supp_rates & WLAN_RATE_11M)
2513 sta->supported_rates[3] = 22;
2514 prism2_check_tx_rates(sta);
2515 atomic_dec(&sta->users);
2516 return 0;
2517 }
2518
2519
2520 static int prism2_hostapd_remove_sta(struct ap_data *ap,
2521 struct prism2_hostapd_param *param)
2522 {
2523 struct sta_info *sta;
2524
2525 spin_lock_bh(&ap->sta_table_lock);
2526 sta = ap_get_sta(ap, param->sta_addr);
2527 if (sta) {
2528 ap_sta_hash_del(ap, sta);
2529 list_del(&sta->list);
2530 }
2531 spin_unlock_bh(&ap->sta_table_lock);
2532
2533 if (!sta)
2534 return -ENOENT;
2535
2536 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
2537 hostap_event_expired_sta(sta->local->dev, sta);
2538 ap_free_sta(ap, sta);
2539
2540 return 0;
2541 }
2542
2543
2544 static int prism2_hostapd_get_info_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)
2556 return -ENOENT;
2557
2558 param->u.get_info_sta.inactive_sec = (jiffies - sta->last_rx) / HZ;
2559
2560 atomic_dec(&sta->users);
2561
2562 return 1;
2563 }
2564
2565
2566 static int prism2_hostapd_set_flags_sta(struct ap_data *ap,
2567 struct prism2_hostapd_param *param)
2568 {
2569 struct sta_info *sta;
2570
2571 spin_lock_bh(&ap->sta_table_lock);
2572 sta = ap_get_sta(ap, param->sta_addr);
2573 if (sta) {
2574 sta->flags |= param->u.set_flags_sta.flags_or;
2575 sta->flags &= param->u.set_flags_sta.flags_and;
2576 }
2577 spin_unlock_bh(&ap->sta_table_lock);
2578
2579 if (!sta)
2580 return -ENOENT;
2581
2582 return 0;
2583 }
2584
2585
2586 static int prism2_hostapd_sta_clear_stats(struct ap_data *ap,
2587 struct prism2_hostapd_param *param)
2588 {
2589 struct sta_info *sta;
2590 int rate;
2591
2592 spin_lock_bh(&ap->sta_table_lock);
2593 sta = ap_get_sta(ap, param->sta_addr);
2594 if (sta) {
2595 sta->rx_packets = sta->tx_packets = 0;
2596 sta->rx_bytes = sta->tx_bytes = 0;
2597 for (rate = 0; rate < WLAN_RATE_COUNT; rate++) {
2598 sta->tx_count[rate] = 0;
2599 sta->rx_count[rate] = 0;
2600 }
2601 }
2602 spin_unlock_bh(&ap->sta_table_lock);
2603
2604 if (!sta)
2605 return -ENOENT;
2606
2607 return 0;
2608 }
2609
2610
2611 static int prism2_hostapd(struct ap_data *ap,
2612 struct prism2_hostapd_param *param)
2613 {
2614 switch (param->cmd) {
2615 case PRISM2_HOSTAPD_FLUSH:
2616 ap_control_kickall(ap);
2617 return 0;
2618 case PRISM2_HOSTAPD_ADD_STA:
2619 return prism2_hostapd_add_sta(ap, param);
2620 case PRISM2_HOSTAPD_REMOVE_STA:
2621 return prism2_hostapd_remove_sta(ap, param);
2622 case PRISM2_HOSTAPD_GET_INFO_STA:
2623 return prism2_hostapd_get_info_sta(ap, param);
2624 case PRISM2_HOSTAPD_SET_FLAGS_STA:
2625 return prism2_hostapd_set_flags_sta(ap, param);
2626 case PRISM2_HOSTAPD_STA_CLEAR_STATS:
2627 return prism2_hostapd_sta_clear_stats(ap, param);
2628 default:
2629 printk(KERN_WARNING "prism2_hostapd: unknown cmd=%d\n",
2630 param->cmd);
2631 return -EOPNOTSUPP;
2632 }
2633 }
2634
2635
2636 /* Update station info for host-based TX rate control and return current
2637 * TX rate */
2638 static int ap_update_sta_tx_rate(struct sta_info *sta, struct net_device *dev)
2639 {
2640 int ret = sta->tx_rate;
2641 struct hostap_interface *iface;
2642 local_info_t *local;
2643
2644 iface = netdev_priv(dev);
2645 local = iface->local;
2646
2647 sta->tx_count[sta->tx_rate_idx]++;
2648 sta->tx_since_last_failure++;
2649 sta->tx_consecutive_exc = 0;
2650 if (sta->tx_since_last_failure >= WLAN_RATE_UPDATE_COUNT &&
2651 sta->tx_rate_idx < sta->tx_max_rate) {
2652 /* use next higher rate */
2653 int old_rate, new_rate;
2654 old_rate = new_rate = sta->tx_rate_idx;
2655 while (new_rate < sta->tx_max_rate) {
2656 new_rate++;
2657 if (ap_tx_rate_ok(new_rate, sta, local)) {
2658 sta->tx_rate_idx = new_rate;
2659 break;
2660 }
2661 }
2662 if (old_rate != sta->tx_rate_idx) {
2663 switch (sta->tx_rate_idx) {
2664 case 0: sta->tx_rate = 10; break;
2665 case 1: sta->tx_rate = 20; break;
2666 case 2: sta->tx_rate = 55; break;
2667 case 3: sta->tx_rate = 110; break;
2668 default: sta->tx_rate = 0; break;
2669 }
2670 PDEBUG(DEBUG_AP, "%s: STA " MACSTR " TX rate raised to"
2671 " %d\n", dev->name, MAC2STR(sta->addr),
2672 sta->tx_rate);
2673 }
2674 sta->tx_since_last_failure = 0;
2675 }
2676
2677 return ret;
2678 }
2679
2680
2681 /* Called only from software IRQ. Called for each TX frame prior possible
2682 * encryption and transmit. */
2683 ap_tx_ret hostap_handle_sta_tx(local_info_t *local, struct hostap_tx_data *tx)
2684 {
2685 struct sta_info *sta = NULL;
2686 struct sk_buff *skb = tx->skb;
2687 int set_tim, ret;
2688 struct ieee80211_hdr_4addr *hdr;
2689 struct hostap_skb_tx_data *meta;
2690
2691 meta = (struct hostap_skb_tx_data *) skb->cb;
2692 ret = AP_TX_CONTINUE;
2693 if (local->ap == NULL || skb->len < 10 ||
2694 meta->iface->type == HOSTAP_INTERFACE_STA)
2695 goto out;
2696
2697 hdr = (struct ieee80211_hdr_4addr *) skb->data;
2698
2699 if (hdr->addr1[0] & 0x01) {
2700 /* broadcast/multicast frame - no AP related processing */
2701 goto out;
2702 }
2703
2704 /* unicast packet - check whether destination STA is associated */
2705 spin_lock(&local->ap->sta_table_lock);
2706 sta = ap_get_sta(local->ap, hdr->addr1);
2707 if (sta)
2708 atomic_inc(&sta->users);
2709 spin_unlock(&local->ap->sta_table_lock);
2710
2711 if (local->iw_mode == IW_MODE_MASTER && sta == NULL &&
2712 !(meta->flags & HOSTAP_TX_FLAGS_WDS) &&
2713 meta->iface->type != HOSTAP_INTERFACE_MASTER &&
2714 meta->iface->type != HOSTAP_INTERFACE_AP) {
2715 #if 0
2716 /* This can happen, e.g., when wlan0 is added to a bridge and
2717 * bridging code does not know which port is the correct target
2718 * for a unicast frame. In this case, the packet is send to all
2719 * ports of the bridge. Since this is a valid scenario, do not
2720 * print out any errors here. */
2721 if (net_ratelimit()) {
2722 printk(KERN_DEBUG "AP: drop packet to non-associated "
2723 "STA " MACSTR "\n", MAC2STR(hdr->addr1));
2724 }
2725 #endif
2726 local->ap->tx_drop_nonassoc++;
2727 ret = AP_TX_DROP;
2728 goto out;
2729 }
2730
2731 if (sta == NULL)
2732 goto out;
2733
2734 if (!(sta->flags & WLAN_STA_AUTHORIZED))
2735 ret = AP_TX_CONTINUE_NOT_AUTHORIZED;
2736
2737 /* Set tx_rate if using host-based TX rate control */
2738 if (!local->fw_tx_rate_control)
2739 local->ap->last_tx_rate = meta->rate =
2740 ap_update_sta_tx_rate(sta, local->dev);
2741
2742 if (local->iw_mode != IW_MODE_MASTER)
2743 goto out;
2744
2745 if (!(sta->flags & WLAN_STA_PS))
2746 goto out;
2747
2748 if (meta->flags & HOSTAP_TX_FLAGS_ADD_MOREDATA) {
2749 /* indicate to STA that more frames follow */
2750 hdr->frame_ctl |=
2751 __constant_cpu_to_le16(IEEE80211_FCTL_MOREDATA);
2752 }
2753
2754 if (meta->flags & HOSTAP_TX_FLAGS_BUFFERED_FRAME) {
2755 /* packet was already buffered and now send due to
2756 * PS poll, so do not rebuffer it */
2757 goto out;
2758 }
2759
2760 if (skb_queue_len(&sta->tx_buf) >= STA_MAX_TX_BUFFER) {
2761 PDEBUG(DEBUG_PS, "%s: No more space in STA (" MACSTR ")'s PS "
2762 "mode buffer\n", local->dev->name, MAC2STR(sta->addr));
2763 /* Make sure that TIM is set for the station (it might not be
2764 * after AP wlan hw reset). */
2765 /* FIX: should fix hw reset to restore bits based on STA
2766 * buffer state.. */
2767 hostap_set_tim(local, sta->aid, 1);
2768 sta->flags |= WLAN_STA_TIM;
2769 ret = AP_TX_DROP;
2770 goto out;
2771 }
2772
2773 /* STA in PS mode, buffer frame for later delivery */
2774 set_tim = skb_queue_empty(&sta->tx_buf);
2775 skb_queue_tail(&sta->tx_buf, skb);
2776 /* FIX: could save RX time to skb and expire buffered frames after
2777 * some time if STA does not poll for them */
2778
2779 if (set_tim) {
2780 if (sta->flags & WLAN_STA_TIM)
2781 PDEBUG(DEBUG_PS2, "Re-setting TIM for aid %d\n",
2782 sta->aid);
2783 hostap_set_tim(local, sta->aid, 1);
2784 sta->flags |= WLAN_STA_TIM;
2785 }
2786
2787 ret = AP_TX_BUFFERED;
2788
2789 out:
2790 if (sta != NULL) {
2791 if (ret == AP_TX_CONTINUE ||
2792 ret == AP_TX_CONTINUE_NOT_AUTHORIZED) {
2793 sta->tx_packets++;
2794 sta->tx_bytes += skb->len;
2795 sta->last_tx = jiffies;
2796 }
2797
2798 if ((ret == AP_TX_CONTINUE ||
2799 ret == AP_TX_CONTINUE_NOT_AUTHORIZED) &&
2800 sta->crypt && tx->host_encrypt) {
2801 tx->crypt = sta->crypt;
2802 tx->sta_ptr = sta; /* hostap_handle_sta_release() will
2803 * be called to release sta info
2804 * later */
2805 } else
2806 atomic_dec(&sta->users);
2807 }
2808
2809 return ret;
2810 }
2811
2812
2813 void hostap_handle_sta_release(void *ptr)
2814 {
2815 struct sta_info *sta = ptr;
2816 atomic_dec(&sta->users);
2817 }
2818
2819
2820 /* Called only as a tasklet (software IRQ) */
2821 void hostap_handle_sta_tx_exc(local_info_t *local, struct sk_buff *skb)
2822 {
2823 struct sta_info *sta;
2824 struct ieee80211_hdr_4addr *hdr;
2825 struct hostap_skb_tx_data *meta;
2826
2827 hdr = (struct ieee80211_hdr_4addr *) skb->data;
2828 meta = (struct hostap_skb_tx_data *) skb->cb;
2829
2830 spin_lock(&local->ap->sta_table_lock);
2831 sta = ap_get_sta(local->ap, hdr->addr1);
2832 if (!sta) {
2833 spin_unlock(&local->ap->sta_table_lock);
2834 PDEBUG(DEBUG_AP, "%s: Could not find STA " MACSTR " for this "
2835 "TX error (@%lu)\n",
2836 local->dev->name, MAC2STR(hdr->addr1), jiffies);
2837 return;
2838 }
2839
2840 sta->tx_since_last_failure = 0;
2841 sta->tx_consecutive_exc++;
2842
2843 if (sta->tx_consecutive_exc >= WLAN_RATE_DECREASE_THRESHOLD &&
2844 sta->tx_rate_idx > 0 && meta->rate <= sta->tx_rate) {
2845 /* use next lower rate */
2846 int old, rate;
2847 old = rate = sta->tx_rate_idx;
2848 while (rate > 0) {
2849 rate--;
2850 if (ap_tx_rate_ok(rate, sta, local)) {
2851 sta->tx_rate_idx = rate;
2852 break;
2853 }
2854 }
2855 if (old != sta->tx_rate_idx) {
2856 switch (sta->tx_rate_idx) {
2857 case 0: sta->tx_rate = 10; break;
2858 case 1: sta->tx_rate = 20; break;
2859 case 2: sta->tx_rate = 55; break;
2860 case 3: sta->tx_rate = 110; break;
2861 default: sta->tx_rate = 0; break;
2862 }
2863 PDEBUG(DEBUG_AP, "%s: STA " MACSTR " TX rate lowered "
2864 "to %d\n", local->dev->name, MAC2STR(sta->addr),
2865 sta->tx_rate);
2866 }
2867 sta->tx_consecutive_exc = 0;
2868 }
2869 spin_unlock(&local->ap->sta_table_lock);
2870 }
2871
2872
2873 static void hostap_update_sta_ps2(local_info_t *local, struct sta_info *sta,
2874 int pwrmgt, int type, int stype)
2875 {
2876 if (pwrmgt && !(sta->flags & WLAN_STA_PS)) {
2877 sta->flags |= WLAN_STA_PS;
2878 PDEBUG(DEBUG_PS2, "STA " MACSTR " changed to use PS "
2879 "mode (type=0x%02X, stype=0x%02X)\n",
2880 MAC2STR(sta->addr), type >> 2, stype >> 4);
2881 } else if (!pwrmgt && (sta->flags & WLAN_STA_PS)) {
2882 sta->flags &= ~WLAN_STA_PS;
2883 PDEBUG(DEBUG_PS2, "STA " MACSTR " changed to not use "
2884 "PS mode (type=0x%02X, stype=0x%02X)\n",
2885 MAC2STR(sta->addr), type >> 2, stype >> 4);
2886 if (type != IEEE80211_FTYPE_CTL ||
2887 stype != IEEE80211_STYPE_PSPOLL)
2888 schedule_packet_send(local, sta);
2889 }
2890 }
2891
2892
2893 /* Called only as a tasklet (software IRQ). Called for each RX frame to update
2894 * STA power saving state. pwrmgt is a flag from 802.11 frame_ctl field. */
2895 int hostap_update_sta_ps(local_info_t *local, struct ieee80211_hdr_4addr *hdr)
2896 {
2897 struct sta_info *sta;
2898 u16 fc;
2899
2900 spin_lock(&local->ap->sta_table_lock);
2901 sta = ap_get_sta(local->ap, hdr->addr2);
2902 if (sta)
2903 atomic_inc(&sta->users);
2904 spin_unlock(&local->ap->sta_table_lock);
2905
2906 if (!sta)
2907 return -1;
2908
2909 fc = le16_to_cpu(hdr->frame_ctl);
2910 hostap_update_sta_ps2(local, sta, fc & IEEE80211_FCTL_PM,
2911 WLAN_FC_GET_TYPE(fc), WLAN_FC_GET_STYPE(fc));
2912
2913 atomic_dec(&sta->users);
2914 return 0;
2915 }
2916
2917
2918 /* Called only as a tasklet (software IRQ). Called for each RX frame after
2919 * getting RX header and payload from hardware. */
2920 ap_rx_ret hostap_handle_sta_rx(local_info_t *local, struct net_device *dev,
2921 struct sk_buff *skb,
2922 struct hostap_80211_rx_status *rx_stats,
2923 int wds)
2924 {
2925 int ret;
2926 struct sta_info *sta;
2927 u16 fc, type, stype;
2928 struct ieee80211_hdr_4addr *hdr;
2929
2930 if (local->ap == NULL)
2931 return AP_RX_CONTINUE;
2932
2933 hdr = (struct ieee80211_hdr_4addr *) skb->data;
2934
2935 fc = le16_to_cpu(hdr->frame_ctl);
2936 type = WLAN_FC_GET_TYPE(fc);
2937 stype = WLAN_FC_GET_STYPE(fc);
2938
2939 spin_lock(&local->ap->sta_table_lock);
2940 sta = ap_get_sta(local->ap, hdr->addr2);
2941 if (sta)
2942 atomic_inc(&sta->users);
2943 spin_unlock(&local->ap->sta_table_lock);
2944
2945 if (sta && !(sta->flags & WLAN_STA_AUTHORIZED))
2946 ret = AP_RX_CONTINUE_NOT_AUTHORIZED;
2947 else
2948 ret = AP_RX_CONTINUE;
2949
2950
2951 if (fc & IEEE80211_FCTL_TODS) {
2952 if (!wds && (sta == NULL || !(sta->flags & WLAN_STA_ASSOC))) {
2953 if (local->hostapd) {
2954 prism2_rx_80211(local->apdev, skb, rx_stats,
2955 PRISM2_RX_NON_ASSOC);
2956 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2957 } else {
2958 printk(KERN_DEBUG "%s: dropped received packet"
2959 " from non-associated STA " MACSTR
2960 " (type=0x%02x, subtype=0x%02x)\n",
2961 dev->name, MAC2STR(hdr->addr2),
2962 type >> 2, stype >> 4);
2963 hostap_rx(dev, skb, rx_stats);
2964 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2965 }
2966 ret = AP_RX_EXIT;
2967 goto out;
2968 }
2969 } else if (fc & IEEE80211_FCTL_FROMDS) {
2970 if (!wds) {
2971 /* FromDS frame - not for us; probably
2972 * broadcast/multicast in another BSS - drop */
2973 if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
2974 printk(KERN_DEBUG "Odd.. FromDS packet "
2975 "received with own BSSID\n");
2976 hostap_dump_rx_80211(dev->name, skb, rx_stats);
2977 }
2978 ret = AP_RX_DROP;
2979 goto out;
2980 }
2981 } else if (stype == IEEE80211_STYPE_NULLFUNC && sta == NULL &&
2982 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
2983
2984 if (local->hostapd) {
2985 prism2_rx_80211(local->apdev, skb, rx_stats,
2986 PRISM2_RX_NON_ASSOC);
2987 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2988 } else {
2989 /* At least Lucent f/w seems to send data::nullfunc
2990 * frames with no ToDS flag when the current AP returns
2991 * after being unavailable for some time. Speed up
2992 * re-association by informing the station about it not
2993 * being associated. */
2994 printk(KERN_DEBUG "%s: rejected received nullfunc "
2995 "frame without ToDS from not associated STA "
2996 MACSTR "\n",
2997 dev->name, MAC2STR(hdr->addr2));
2998 hostap_rx(dev, skb, rx_stats);
2999 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
3000 }
3001 ret = AP_RX_EXIT;
3002 goto out;
3003 } else if (stype == IEEE80211_STYPE_NULLFUNC) {
3004 /* At least Lucent cards seem to send periodic nullfunc
3005 * frames with ToDS. Let these through to update SQ
3006 * stats and PS state. Nullfunc frames do not contain
3007 * any data and they will be dropped below. */
3008 } else {
3009 /* If BSSID (Addr3) is foreign, this frame is a normal
3010 * broadcast frame from an IBSS network. Drop it silently.
3011 * If BSSID is own, report the dropping of this frame. */
3012 if (memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
3013 printk(KERN_DEBUG "%s: dropped received packet from "
3014 MACSTR " with no ToDS flag (type=0x%02x, "
3015 "subtype=0x%02x)\n", dev->name,
3016 MAC2STR(hdr->addr2), type >> 2, stype >> 4);
3017 hostap_dump_rx_80211(dev->name, skb, rx_stats);
3018 }
3019 ret = AP_RX_DROP;
3020 goto out;
3021 }
3022
3023 if (sta) {
3024 hostap_update_sta_ps2(local, sta, fc & IEEE80211_FCTL_PM,
3025 type, stype);
3026
3027 sta->rx_packets++;
3028 sta->rx_bytes += skb->len;
3029 sta->last_rx = jiffies;
3030 }
3031
3032 if (local->ap->nullfunc_ack && stype == IEEE80211_STYPE_NULLFUNC &&
3033 fc & IEEE80211_FCTL_TODS) {
3034 if (local->hostapd) {
3035 prism2_rx_80211(local->apdev, skb, rx_stats,
3036 PRISM2_RX_NULLFUNC_ACK);
3037 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
3038 } else {
3039 /* some STA f/w's seem to require control::ACK frame
3040 * for data::nullfunc, but Prism2 f/w 0.8.0 (at least
3041 * from Compaq) does not send this.. Try to generate
3042 * ACK for these frames from the host driver to make
3043 * power saving work with, e.g., Lucent WaveLAN f/w */
3044 hostap_rx(dev, skb, rx_stats);
3045 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
3046 }
3047 ret = AP_RX_EXIT;
3048 goto out;
3049 }
3050
3051 out:
3052 if (sta)
3053 atomic_dec(&sta->users);
3054
3055 return ret;
3056 }
3057
3058
3059 /* Called only as a tasklet (software IRQ) */
3060 int hostap_handle_sta_crypto(local_info_t *local,
3061 struct ieee80211_hdr_4addr *hdr,
3062 struct ieee80211_crypt_data **crypt,
3063 void **sta_ptr)
3064 {
3065 struct sta_info *sta;
3066
3067 spin_lock(&local->ap->sta_table_lock);
3068 sta = ap_get_sta(local->ap, hdr->addr2);
3069 if (sta)
3070 atomic_inc(&sta->users);
3071 spin_unlock(&local->ap->sta_table_lock);
3072
3073 if (!sta)
3074 return -1;
3075
3076 if (sta->crypt) {
3077 *crypt = sta->crypt;
3078 *sta_ptr = sta;
3079 /* hostap_handle_sta_release() will be called to release STA
3080 * info */
3081 } else
3082 atomic_dec(&sta->users);
3083
3084 return 0;
3085 }
3086
3087
3088 /* Called only as a tasklet (software IRQ) */
3089 int hostap_is_sta_assoc(struct ap_data *ap, u8 *sta_addr)
3090 {
3091 struct sta_info *sta;
3092 int ret = 0;
3093
3094 spin_lock(&ap->sta_table_lock);
3095 sta = ap_get_sta(ap, sta_addr);
3096 if (sta != NULL && (sta->flags & WLAN_STA_ASSOC) && !sta->ap)
3097 ret = 1;
3098 spin_unlock(&ap->sta_table_lock);
3099
3100 return ret;
3101 }
3102
3103
3104 /* Called only as a tasklet (software IRQ) */
3105 int hostap_is_sta_authorized(struct ap_data *ap, u8 *sta_addr)
3106 {
3107 struct sta_info *sta;
3108 int ret = 0;
3109
3110 spin_lock(&ap->sta_table_lock);
3111 sta = ap_get_sta(ap, sta_addr);
3112 if (sta != NULL && (sta->flags & WLAN_STA_ASSOC) && !sta->ap &&
3113 ((sta->flags & WLAN_STA_AUTHORIZED) ||
3114 ap->local->ieee_802_1x == 0))
3115 ret = 1;
3116 spin_unlock(&ap->sta_table_lock);
3117
3118 return ret;
3119 }
3120
3121
3122 /* Called only as a tasklet (software IRQ) */
3123 int hostap_add_sta(struct ap_data *ap, u8 *sta_addr)
3124 {
3125 struct sta_info *sta;
3126 int ret = 1;
3127
3128 if (!ap)
3129 return -1;
3130
3131 spin_lock(&ap->sta_table_lock);
3132 sta = ap_get_sta(ap, sta_addr);
3133 if (sta)
3134 ret = 0;
3135 spin_unlock(&ap->sta_table_lock);
3136
3137 if (ret == 1) {
3138 sta = ap_add_sta(ap, sta_addr);
3139 if (!sta)
3140 ret = -1;
3141 sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
3142 sta->ap = 1;
3143 memset(sta->supported_rates, 0, sizeof(sta->supported_rates));
3144 /* No way of knowing which rates are supported since we did not
3145 * get supported rates element from beacon/assoc req. Assume
3146 * that remote end supports all 802.11b rates. */
3147 sta->supported_rates[0] = 0x82;
3148 sta->supported_rates[1] = 0x84;
3149 sta->supported_rates[2] = 0x0b;
3150 sta->supported_rates[3] = 0x16;
3151 sta->tx_supp_rates = WLAN_RATE_1M | WLAN_RATE_2M |
3152 WLAN_RATE_5M5 | WLAN_RATE_11M;
3153 sta->tx_rate = 110;
3154 sta->tx_max_rate = sta->tx_rate_idx = 3;
3155 }
3156
3157 return ret;
3158 }
3159
3160
3161 /* Called only as a tasklet (software IRQ) */
3162 int hostap_update_rx_stats(struct ap_data *ap,
3163 struct ieee80211_hdr_4addr *hdr,
3164 struct hostap_80211_rx_status *rx_stats)
3165 {
3166 struct sta_info *sta;
3167
3168 if (!ap)
3169 return -1;
3170
3171 spin_lock(&ap->sta_table_lock);
3172 sta = ap_get_sta(ap, hdr->addr2);
3173 if (sta) {
3174 sta->last_rx_silence = rx_stats->noise;
3175 sta->last_rx_signal = rx_stats->signal;
3176 sta->last_rx_rate = rx_stats->rate;
3177 sta->last_rx_updated = IW_QUAL_ALL_UPDATED | IW_QUAL_DBM;
3178 if (rx_stats->rate == 10)
3179 sta->rx_count[0]++;
3180 else if (rx_stats->rate == 20)
3181 sta->rx_count[1]++;
3182 else if (rx_stats->rate == 55)
3183 sta->rx_count[2]++;
3184 else if (rx_stats->rate == 110)
3185 sta->rx_count[3]++;
3186 }
3187 spin_unlock(&ap->sta_table_lock);
3188
3189 return sta ? 0 : -1;
3190 }
3191
3192
3193 void hostap_update_rates(local_info_t *local)
3194 {
3195 struct list_head *ptr;
3196 struct ap_data *ap = local->ap;
3197
3198 if (!ap)
3199 return;
3200
3201 spin_lock_bh(&ap->sta_table_lock);
3202 for (ptr = ap->sta_list.next; ptr != &ap->sta_list; ptr = ptr->next) {
3203 struct sta_info *sta = (struct sta_info *) ptr;
3204 prism2_check_tx_rates(sta);
3205 }
3206 spin_unlock_bh(&ap->sta_table_lock);
3207 }
3208
3209
3210 static void * ap_crypt_get_ptrs(struct ap_data *ap, u8 *addr, int permanent,
3211 struct ieee80211_crypt_data ***crypt)
3212 {
3213 struct sta_info *sta;
3214
3215 spin_lock_bh(&ap->sta_table_lock);
3216 sta = ap_get_sta(ap, addr);
3217 if (sta)
3218 atomic_inc(&sta->users);
3219 spin_unlock_bh(&ap->sta_table_lock);
3220
3221 if (!sta && permanent)
3222 sta = ap_add_sta(ap, addr);
3223
3224 if (!sta)
3225 return NULL;
3226
3227 if (permanent)
3228 sta->flags |= WLAN_STA_PERM;
3229
3230 *crypt = &sta->crypt;
3231
3232 return sta;
3233 }
3234
3235
3236 void hostap_add_wds_links(local_info_t *local)
3237 {
3238 struct ap_data *ap = local->ap;
3239 struct list_head *ptr;
3240
3241 spin_lock_bh(&ap->sta_table_lock);
3242 list_for_each(ptr, &ap->sta_list) {
3243 struct sta_info *sta = list_entry(ptr, struct sta_info, list);
3244 if (sta->ap)
3245 hostap_wds_link_oper(local, sta->addr, WDS_ADD);
3246 }
3247 spin_unlock_bh(&ap->sta_table_lock);
3248
3249 schedule_work(&local->ap->wds_oper_queue);
3250 }
3251
3252
3253 void hostap_wds_link_oper(local_info_t *local, u8 *addr, wds_oper_type type)
3254 {
3255 struct wds_oper_data *entry;
3256
3257 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
3258 if (!entry)
3259 return;
3260 memcpy(entry->addr, addr, ETH_ALEN);
3261 entry->type = type;
3262 spin_lock_bh(&local->lock);
3263 entry->next = local->ap->wds_oper_entries;
3264 local->ap->wds_oper_entries = entry;
3265 spin_unlock_bh(&local->lock);
3266
3267 schedule_work(&local->ap->wds_oper_queue);
3268 }
3269
3270
3271 EXPORT_SYMBOL(hostap_init_data);
3272 EXPORT_SYMBOL(hostap_init_ap_proc);
3273 EXPORT_SYMBOL(hostap_free_data);
3274 EXPORT_SYMBOL(hostap_check_sta_fw_version);
3275 EXPORT_SYMBOL(hostap_handle_sta_tx);
3276 EXPORT_SYMBOL(hostap_handle_sta_release);
3277 EXPORT_SYMBOL(hostap_handle_sta_tx_exc);
3278 EXPORT_SYMBOL(hostap_update_sta_ps);
3279 EXPORT_SYMBOL(hostap_handle_sta_rx);
3280 EXPORT_SYMBOL(hostap_is_sta_assoc);
3281 EXPORT_SYMBOL(hostap_is_sta_authorized);
3282 EXPORT_SYMBOL(hostap_add_sta);
3283 EXPORT_SYMBOL(hostap_update_rates);
3284 EXPORT_SYMBOL(hostap_add_wds_links);
3285 EXPORT_SYMBOL(hostap_wds_link_oper);
3286 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
3287 EXPORT_SYMBOL(hostap_deauth_all_stas);
3288 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
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