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[mirror_ubuntu-zesty-kernel.git] / drivers / net / wireless / hostap / hostap_ap.c
1 /*
2 * Intersil Prism2 driver with Host AP (software access point) support
3 * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
4 * <j@w1.fi>
5 * Copyright (c) 2002-2005, Jouni Malinen <j@w1.fi>
6 *
7 * This file is to be included into hostap.c when S/W AP functionality is
8 * compiled.
9 *
10 * AP: FIX:
11 * - if unicast Class 2 (assoc,reassoc,disassoc) frame received from
12 * unauthenticated STA, send deauth. frame (8802.11: 5.5)
13 * - if unicast Class 3 (data with to/from DS,deauth,pspoll) frame received
14 * from authenticated, but unassoc STA, send disassoc frame (8802.11: 5.5)
15 * - if unicast Class 3 received from unauthenticated STA, send deauth. frame
16 * (8802.11: 5.5)
17 */
18
19 #include <linux/proc_fs.h>
20 #include <linux/delay.h>
21 #include <linux/random.h>
22 #include <linux/if_arp.h>
23 #include <linux/slab.h>
24
25 #include "hostap_wlan.h"
26 #include "hostap.h"
27 #include "hostap_ap.h"
28
29 static int other_ap_policy[MAX_PARM_DEVICES] = { AP_OTHER_AP_SKIP_ALL,
30 DEF_INTS };
31 module_param_array(other_ap_policy, int, NULL, 0444);
32 MODULE_PARM_DESC(other_ap_policy, "Other AP beacon monitoring policy (0-3)");
33
34 static int ap_max_inactivity[MAX_PARM_DEVICES] = { AP_MAX_INACTIVITY_SEC,
35 DEF_INTS };
36 module_param_array(ap_max_inactivity, int, NULL, 0444);
37 MODULE_PARM_DESC(ap_max_inactivity, "AP timeout (in seconds) for station "
38 "inactivity");
39
40 static int ap_bridge_packets[MAX_PARM_DEVICES] = { 1, DEF_INTS };
41 module_param_array(ap_bridge_packets, int, NULL, 0444);
42 MODULE_PARM_DESC(ap_bridge_packets, "Bridge packets directly between "
43 "stations");
44
45 static int autom_ap_wds[MAX_PARM_DEVICES] = { 0, DEF_INTS };
46 module_param_array(autom_ap_wds, int, NULL, 0444);
47 MODULE_PARM_DESC(autom_ap_wds, "Add WDS connections to other APs "
48 "automatically");
49
50
51 static struct sta_info* ap_get_sta(struct ap_data *ap, u8 *sta);
52 static void hostap_event_expired_sta(struct net_device *dev,
53 struct sta_info *sta);
54 static void handle_add_proc_queue(struct work_struct *work);
55
56 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
57 static void handle_wds_oper_queue(struct work_struct *work);
58 static void prism2_send_mgmt(struct net_device *dev,
59 u16 type_subtype, char *body,
60 int body_len, u8 *addr, u16 tx_cb_idx);
61 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
62
63
64 #ifndef PRISM2_NO_PROCFS_DEBUG
65 static int ap_debug_proc_read(char *page, char **start, off_t off,
66 int count, int *eof, void *data)
67 {
68 char *p = page;
69 struct ap_data *ap = (struct ap_data *) data;
70
71 if (off != 0) {
72 *eof = 1;
73 return 0;
74 }
75
76 p += sprintf(p, "BridgedUnicastFrames=%u\n", ap->bridged_unicast);
77 p += sprintf(p, "BridgedMulticastFrames=%u\n", ap->bridged_multicast);
78 p += sprintf(p, "max_inactivity=%u\n", ap->max_inactivity / HZ);
79 p += sprintf(p, "bridge_packets=%u\n", ap->bridge_packets);
80 p += sprintf(p, "nullfunc_ack=%u\n", ap->nullfunc_ack);
81 p += sprintf(p, "autom_ap_wds=%u\n", ap->autom_ap_wds);
82 p += sprintf(p, "auth_algs=%u\n", ap->local->auth_algs);
83 p += sprintf(p, "tx_drop_nonassoc=%u\n", ap->tx_drop_nonassoc);
84
85 return (p - page);
86 }
87 #endif /* PRISM2_NO_PROCFS_DEBUG */
88
89
90 static void ap_sta_hash_add(struct ap_data *ap, struct sta_info *sta)
91 {
92 sta->hnext = ap->sta_hash[STA_HASH(sta->addr)];
93 ap->sta_hash[STA_HASH(sta->addr)] = sta;
94 }
95
96 static void ap_sta_hash_del(struct ap_data *ap, struct sta_info *sta)
97 {
98 struct sta_info *s;
99
100 s = ap->sta_hash[STA_HASH(sta->addr)];
101 if (s == NULL) return;
102 if (memcmp(s->addr, sta->addr, ETH_ALEN) == 0) {
103 ap->sta_hash[STA_HASH(sta->addr)] = s->hnext;
104 return;
105 }
106
107 while (s->hnext != NULL && memcmp(s->hnext->addr, sta->addr, ETH_ALEN)
108 != 0)
109 s = s->hnext;
110 if (s->hnext != NULL)
111 s->hnext = s->hnext->hnext;
112 else
113 printk("AP: could not remove STA %pM from hash table\n",
114 sta->addr);
115 }
116
117 static void ap_free_sta(struct ap_data *ap, struct sta_info *sta)
118 {
119 if (sta->ap && sta->local)
120 hostap_event_expired_sta(sta->local->dev, sta);
121
122 if (ap->proc != NULL) {
123 char name[20];
124 sprintf(name, "%pM", sta->addr);
125 remove_proc_entry(name, ap->proc);
126 }
127
128 if (sta->crypt) {
129 sta->crypt->ops->deinit(sta->crypt->priv);
130 kfree(sta->crypt);
131 sta->crypt = NULL;
132 }
133
134 skb_queue_purge(&sta->tx_buf);
135
136 ap->num_sta--;
137 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
138 if (sta->aid > 0)
139 ap->sta_aid[sta->aid - 1] = NULL;
140
141 if (!sta->ap && sta->u.sta.challenge)
142 kfree(sta->u.sta.challenge);
143 del_timer(&sta->timer);
144 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
145
146 kfree(sta);
147 }
148
149
150 static void hostap_set_tim(local_info_t *local, int aid, int set)
151 {
152 if (local->func->set_tim)
153 local->func->set_tim(local->dev, aid, set);
154 }
155
156
157 static void hostap_event_new_sta(struct net_device *dev, struct sta_info *sta)
158 {
159 union iwreq_data wrqu;
160 memset(&wrqu, 0, sizeof(wrqu));
161 memcpy(wrqu.addr.sa_data, sta->addr, ETH_ALEN);
162 wrqu.addr.sa_family = ARPHRD_ETHER;
163 wireless_send_event(dev, IWEVREGISTERED, &wrqu, NULL);
164 }
165
166
167 static void hostap_event_expired_sta(struct net_device *dev,
168 struct sta_info *sta)
169 {
170 union iwreq_data wrqu;
171 memset(&wrqu, 0, sizeof(wrqu));
172 memcpy(wrqu.addr.sa_data, sta->addr, ETH_ALEN);
173 wrqu.addr.sa_family = ARPHRD_ETHER;
174 wireless_send_event(dev, IWEVEXPIRED, &wrqu, NULL);
175 }
176
177
178 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
179
180 static void ap_handle_timer(unsigned long data)
181 {
182 struct sta_info *sta = (struct sta_info *) data;
183 local_info_t *local;
184 struct ap_data *ap;
185 unsigned long next_time = 0;
186 int was_assoc;
187
188 if (sta == NULL || sta->local == NULL || sta->local->ap == NULL) {
189 PDEBUG(DEBUG_AP, "ap_handle_timer() called with NULL data\n");
190 return;
191 }
192
193 local = sta->local;
194 ap = local->ap;
195 was_assoc = sta->flags & WLAN_STA_ASSOC;
196
197 if (atomic_read(&sta->users) != 0)
198 next_time = jiffies + HZ;
199 else if ((sta->flags & WLAN_STA_PERM) && !(sta->flags & WLAN_STA_AUTH))
200 next_time = jiffies + ap->max_inactivity;
201
202 if (time_before(jiffies, sta->last_rx + ap->max_inactivity)) {
203 /* station activity detected; reset timeout state */
204 sta->timeout_next = STA_NULLFUNC;
205 next_time = sta->last_rx + ap->max_inactivity;
206 } else if (sta->timeout_next == STA_DISASSOC &&
207 !(sta->flags & WLAN_STA_PENDING_POLL)) {
208 /* STA ACKed data nullfunc frame poll */
209 sta->timeout_next = STA_NULLFUNC;
210 next_time = jiffies + ap->max_inactivity;
211 }
212
213 if (next_time) {
214 sta->timer.expires = next_time;
215 add_timer(&sta->timer);
216 return;
217 }
218
219 if (sta->ap)
220 sta->timeout_next = STA_DEAUTH;
221
222 if (sta->timeout_next == STA_DEAUTH && !(sta->flags & WLAN_STA_PERM)) {
223 spin_lock(&ap->sta_table_lock);
224 ap_sta_hash_del(ap, sta);
225 list_del(&sta->list);
226 spin_unlock(&ap->sta_table_lock);
227 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
228 } else if (sta->timeout_next == STA_DISASSOC)
229 sta->flags &= ~WLAN_STA_ASSOC;
230
231 if (was_assoc && !(sta->flags & WLAN_STA_ASSOC) && !sta->ap)
232 hostap_event_expired_sta(local->dev, sta);
233
234 if (sta->timeout_next == STA_DEAUTH && sta->aid > 0 &&
235 !skb_queue_empty(&sta->tx_buf)) {
236 hostap_set_tim(local, sta->aid, 0);
237 sta->flags &= ~WLAN_STA_TIM;
238 }
239
240 if (sta->ap) {
241 if (ap->autom_ap_wds) {
242 PDEBUG(DEBUG_AP, "%s: removing automatic WDS "
243 "connection to AP %pM\n",
244 local->dev->name, sta->addr);
245 hostap_wds_link_oper(local, sta->addr, WDS_DEL);
246 }
247 } else if (sta->timeout_next == STA_NULLFUNC) {
248 /* send data frame to poll STA and check whether this frame
249 * is ACKed */
250 /* FIX: IEEE80211_STYPE_NULLFUNC would be more appropriate, but
251 * it is apparently not retried so TX Exc events are not
252 * received for it */
253 sta->flags |= WLAN_STA_PENDING_POLL;
254 prism2_send_mgmt(local->dev, IEEE80211_FTYPE_DATA |
255 IEEE80211_STYPE_DATA, NULL, 0,
256 sta->addr, ap->tx_callback_poll);
257 } else {
258 int deauth = sta->timeout_next == STA_DEAUTH;
259 __le16 resp;
260 PDEBUG(DEBUG_AP, "%s: sending %s info to STA %pM"
261 "(last=%lu, jiffies=%lu)\n",
262 local->dev->name,
263 deauth ? "deauthentication" : "disassociation",
264 sta->addr, sta->last_rx, jiffies);
265
266 resp = cpu_to_le16(deauth ? WLAN_REASON_PREV_AUTH_NOT_VALID :
267 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
268 prism2_send_mgmt(local->dev, IEEE80211_FTYPE_MGMT |
269 (deauth ? IEEE80211_STYPE_DEAUTH :
270 IEEE80211_STYPE_DISASSOC),
271 (char *) &resp, 2, sta->addr, 0);
272 }
273
274 if (sta->timeout_next == STA_DEAUTH) {
275 if (sta->flags & WLAN_STA_PERM) {
276 PDEBUG(DEBUG_AP, "%s: STA %pM"
277 " would have been removed, "
278 "but it has 'perm' flag\n",
279 local->dev->name, sta->addr);
280 } else
281 ap_free_sta(ap, sta);
282 return;
283 }
284
285 if (sta->timeout_next == STA_NULLFUNC) {
286 sta->timeout_next = STA_DISASSOC;
287 sta->timer.expires = jiffies + AP_DISASSOC_DELAY;
288 } else {
289 sta->timeout_next = STA_DEAUTH;
290 sta->timer.expires = jiffies + AP_DEAUTH_DELAY;
291 }
292
293 add_timer(&sta->timer);
294 }
295
296
297 void hostap_deauth_all_stas(struct net_device *dev, struct ap_data *ap,
298 int resend)
299 {
300 u8 addr[ETH_ALEN];
301 __le16 resp;
302 int i;
303
304 PDEBUG(DEBUG_AP, "%s: Deauthenticate all stations\n", dev->name);
305 memset(addr, 0xff, ETH_ALEN);
306
307 resp = cpu_to_le16(WLAN_REASON_PREV_AUTH_NOT_VALID);
308
309 /* deauth message sent; try to resend it few times; the message is
310 * broadcast, so it may be delayed until next DTIM; there is not much
311 * else we can do at this point since the driver is going to be shut
312 * down */
313 for (i = 0; i < 5; i++) {
314 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT |
315 IEEE80211_STYPE_DEAUTH,
316 (char *) &resp, 2, addr, 0);
317
318 if (!resend || ap->num_sta <= 0)
319 return;
320
321 mdelay(50);
322 }
323 }
324
325
326 static int ap_control_proc_read(char *page, char **start, off_t off,
327 int count, int *eof, void *data)
328 {
329 char *p = page;
330 struct ap_data *ap = (struct ap_data *) data;
331 char *policy_txt;
332 struct mac_entry *entry;
333
334 if (off != 0) {
335 *eof = 1;
336 return 0;
337 }
338
339 switch (ap->mac_restrictions.policy) {
340 case MAC_POLICY_OPEN:
341 policy_txt = "open";
342 break;
343 case MAC_POLICY_ALLOW:
344 policy_txt = "allow";
345 break;
346 case MAC_POLICY_DENY:
347 policy_txt = "deny";
348 break;
349 default:
350 policy_txt = "unknown";
351 break;
352 }
353 p += sprintf(p, "MAC policy: %s\n", policy_txt);
354 p += sprintf(p, "MAC entries: %u\n", ap->mac_restrictions.entries);
355 p += sprintf(p, "MAC list:\n");
356 spin_lock_bh(&ap->mac_restrictions.lock);
357 list_for_each_entry(entry, &ap->mac_restrictions.mac_list, list) {
358 if (p - page > PAGE_SIZE - 80) {
359 p += sprintf(p, "All entries did not fit one page.\n");
360 break;
361 }
362
363 p += sprintf(p, "%pM\n", entry->addr);
364 }
365 spin_unlock_bh(&ap->mac_restrictions.lock);
366
367 return (p - page);
368 }
369
370
371 int ap_control_add_mac(struct mac_restrictions *mac_restrictions, u8 *mac)
372 {
373 struct mac_entry *entry;
374
375 entry = kmalloc(sizeof(struct mac_entry), GFP_KERNEL);
376 if (entry == NULL)
377 return -1;
378
379 memcpy(entry->addr, mac, ETH_ALEN);
380
381 spin_lock_bh(&mac_restrictions->lock);
382 list_add_tail(&entry->list, &mac_restrictions->mac_list);
383 mac_restrictions->entries++;
384 spin_unlock_bh(&mac_restrictions->lock);
385
386 return 0;
387 }
388
389
390 int ap_control_del_mac(struct mac_restrictions *mac_restrictions, u8 *mac)
391 {
392 struct list_head *ptr;
393 struct mac_entry *entry;
394
395 spin_lock_bh(&mac_restrictions->lock);
396 for (ptr = mac_restrictions->mac_list.next;
397 ptr != &mac_restrictions->mac_list; ptr = ptr->next) {
398 entry = list_entry(ptr, struct mac_entry, list);
399
400 if (memcmp(entry->addr, mac, ETH_ALEN) == 0) {
401 list_del(ptr);
402 kfree(entry);
403 mac_restrictions->entries--;
404 spin_unlock_bh(&mac_restrictions->lock);
405 return 0;
406 }
407 }
408 spin_unlock_bh(&mac_restrictions->lock);
409 return -1;
410 }
411
412
413 static int ap_control_mac_deny(struct mac_restrictions *mac_restrictions,
414 u8 *mac)
415 {
416 struct mac_entry *entry;
417 int found = 0;
418
419 if (mac_restrictions->policy == MAC_POLICY_OPEN)
420 return 0;
421
422 spin_lock_bh(&mac_restrictions->lock);
423 list_for_each_entry(entry, &mac_restrictions->mac_list, list) {
424 if (memcmp(entry->addr, mac, ETH_ALEN) == 0) {
425 found = 1;
426 break;
427 }
428 }
429 spin_unlock_bh(&mac_restrictions->lock);
430
431 if (mac_restrictions->policy == MAC_POLICY_ALLOW)
432 return !found;
433 else
434 return found;
435 }
436
437
438 void ap_control_flush_macs(struct mac_restrictions *mac_restrictions)
439 {
440 struct list_head *ptr, *n;
441 struct mac_entry *entry;
442
443 if (mac_restrictions->entries == 0)
444 return;
445
446 spin_lock_bh(&mac_restrictions->lock);
447 for (ptr = mac_restrictions->mac_list.next, n = ptr->next;
448 ptr != &mac_restrictions->mac_list;
449 ptr = n, n = ptr->next) {
450 entry = list_entry(ptr, struct mac_entry, list);
451 list_del(ptr);
452 kfree(entry);
453 }
454 mac_restrictions->entries = 0;
455 spin_unlock_bh(&mac_restrictions->lock);
456 }
457
458
459 int ap_control_kick_mac(struct ap_data *ap, struct net_device *dev, u8 *mac)
460 {
461 struct sta_info *sta;
462 __le16 resp;
463
464 spin_lock_bh(&ap->sta_table_lock);
465 sta = ap_get_sta(ap, mac);
466 if (sta) {
467 ap_sta_hash_del(ap, sta);
468 list_del(&sta->list);
469 }
470 spin_unlock_bh(&ap->sta_table_lock);
471
472 if (!sta)
473 return -EINVAL;
474
475 resp = cpu_to_le16(WLAN_REASON_PREV_AUTH_NOT_VALID);
476 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_DEAUTH,
477 (char *) &resp, 2, sta->addr, 0);
478
479 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap)
480 hostap_event_expired_sta(dev, sta);
481
482 ap_free_sta(ap, sta);
483
484 return 0;
485 }
486
487 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
488
489
490 void ap_control_kickall(struct ap_data *ap)
491 {
492 struct list_head *ptr, *n;
493 struct sta_info *sta;
494
495 spin_lock_bh(&ap->sta_table_lock);
496 for (ptr = ap->sta_list.next, n = ptr->next; ptr != &ap->sta_list;
497 ptr = n, n = ptr->next) {
498 sta = list_entry(ptr, struct sta_info, list);
499 ap_sta_hash_del(ap, sta);
500 list_del(&sta->list);
501 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
502 hostap_event_expired_sta(sta->local->dev, sta);
503 ap_free_sta(ap, sta);
504 }
505 spin_unlock_bh(&ap->sta_table_lock);
506 }
507
508
509 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
510
511 #define PROC_LIMIT (PAGE_SIZE - 80)
512
513 static int prism2_ap_proc_read(char *page, char **start, off_t off,
514 int count, int *eof, void *data)
515 {
516 char *p = page;
517 struct ap_data *ap = (struct ap_data *) data;
518 struct sta_info *sta;
519 int i;
520
521 if (off > PROC_LIMIT) {
522 *eof = 1;
523 return 0;
524 }
525
526 p += sprintf(p, "# BSSID CHAN SIGNAL NOISE RATE SSID FLAGS\n");
527 spin_lock_bh(&ap->sta_table_lock);
528 list_for_each_entry(sta, &ap->sta_list, list) {
529 if (!sta->ap)
530 continue;
531
532 p += sprintf(p, "%pM %d %d %d %d '",
533 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 struct ieee80211_hdr *hdr;
594
595 if (!ap->local->hostapd || !ap->local->apdev) {
596 dev_kfree_skb(skb);
597 return;
598 }
599
600 /* Pass the TX callback frame to the hostapd; use 802.11 header version
601 * 1 to indicate failure (no ACK) and 2 success (frame ACKed) */
602
603 hdr = (struct ieee80211_hdr *) skb->data;
604 hdr->frame_control &= cpu_to_le16(~IEEE80211_FCTL_VERS);
605 hdr->frame_control |= cpu_to_le16(ok ? BIT(1) : BIT(0));
606
607 skb->dev = ap->local->apdev;
608 skb_pull(skb, hostap_80211_get_hdrlen(hdr->frame_control));
609 skb->pkt_type = PACKET_OTHERHOST;
610 skb->protocol = cpu_to_be16(ETH_P_802_2);
611 memset(skb->cb, 0, sizeof(skb->cb));
612 netif_rx(skb);
613 }
614
615
616 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
617 /* Called only as a tasklet (software IRQ) */
618 static void hostap_ap_tx_cb_auth(struct sk_buff *skb, int ok, void *data)
619 {
620 struct ap_data *ap = data;
621 struct net_device *dev = ap->local->dev;
622 struct ieee80211_hdr *hdr;
623 u16 auth_alg, auth_transaction, status;
624 __le16 *pos;
625 struct sta_info *sta = NULL;
626 char *txt = NULL;
627
628 if (ap->local->hostapd) {
629 dev_kfree_skb(skb);
630 return;
631 }
632
633 hdr = (struct ieee80211_hdr *) skb->data;
634 if (!ieee80211_is_auth(hdr->frame_control) ||
635 skb->len < IEEE80211_MGMT_HDR_LEN + 6) {
636 printk(KERN_DEBUG "%s: hostap_ap_tx_cb_auth received invalid "
637 "frame\n", dev->name);
638 dev_kfree_skb(skb);
639 return;
640 }
641
642 pos = (__le16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
643 auth_alg = le16_to_cpu(*pos++);
644 auth_transaction = le16_to_cpu(*pos++);
645 status = le16_to_cpu(*pos++);
646
647 if (!ok) {
648 txt = "frame was not ACKed";
649 goto done;
650 }
651
652 spin_lock(&ap->sta_table_lock);
653 sta = ap_get_sta(ap, hdr->addr1);
654 if (sta)
655 atomic_inc(&sta->users);
656 spin_unlock(&ap->sta_table_lock);
657
658 if (!sta) {
659 txt = "STA not found";
660 goto done;
661 }
662
663 if (status == WLAN_STATUS_SUCCESS &&
664 ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 2) ||
665 (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 4))) {
666 txt = "STA authenticated";
667 sta->flags |= WLAN_STA_AUTH;
668 sta->last_auth = jiffies;
669 } else if (status != WLAN_STATUS_SUCCESS)
670 txt = "authentication failed";
671
672 done:
673 if (sta)
674 atomic_dec(&sta->users);
675 if (txt) {
676 PDEBUG(DEBUG_AP, "%s: %pM auth_cb - alg=%d "
677 "trans#=%d status=%d - %s\n",
678 dev->name, hdr->addr1,
679 auth_alg, auth_transaction, status, txt);
680 }
681 dev_kfree_skb(skb);
682 }
683
684
685 /* Called only as a tasklet (software IRQ) */
686 static void hostap_ap_tx_cb_assoc(struct sk_buff *skb, int ok, void *data)
687 {
688 struct ap_data *ap = data;
689 struct net_device *dev = ap->local->dev;
690 struct ieee80211_hdr *hdr;
691 u16 status;
692 __le16 *pos;
693 struct sta_info *sta = NULL;
694 char *txt = NULL;
695
696 if (ap->local->hostapd) {
697 dev_kfree_skb(skb);
698 return;
699 }
700
701 hdr = (struct ieee80211_hdr *) skb->data;
702 if ((!ieee80211_is_assoc_resp(hdr->frame_control) &&
703 !ieee80211_is_reassoc_resp(hdr->frame_control)) ||
704 skb->len < IEEE80211_MGMT_HDR_LEN + 4) {
705 printk(KERN_DEBUG "%s: hostap_ap_tx_cb_assoc received invalid "
706 "frame\n", dev->name);
707 dev_kfree_skb(skb);
708 return;
709 }
710
711 if (!ok) {
712 txt = "frame was not ACKed";
713 goto done;
714 }
715
716 spin_lock(&ap->sta_table_lock);
717 sta = ap_get_sta(ap, hdr->addr1);
718 if (sta)
719 atomic_inc(&sta->users);
720 spin_unlock(&ap->sta_table_lock);
721
722 if (!sta) {
723 txt = "STA not found";
724 goto done;
725 }
726
727 pos = (__le16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
728 pos++;
729 status = le16_to_cpu(*pos++);
730 if (status == WLAN_STATUS_SUCCESS) {
731 if (!(sta->flags & WLAN_STA_ASSOC))
732 hostap_event_new_sta(dev, sta);
733 txt = "STA associated";
734 sta->flags |= WLAN_STA_ASSOC;
735 sta->last_assoc = jiffies;
736 } else
737 txt = "association failed";
738
739 done:
740 if (sta)
741 atomic_dec(&sta->users);
742 if (txt) {
743 PDEBUG(DEBUG_AP, "%s: %pM assoc_cb - %s\n",
744 dev->name, hdr->addr1, txt);
745 }
746 dev_kfree_skb(skb);
747 }
748
749 /* Called only as a tasklet (software IRQ); TX callback for poll frames used
750 * in verifying whether the STA is still present. */
751 static void hostap_ap_tx_cb_poll(struct sk_buff *skb, int ok, void *data)
752 {
753 struct ap_data *ap = data;
754 struct ieee80211_hdr *hdr;
755 struct sta_info *sta;
756
757 if (skb->len < 24)
758 goto fail;
759 hdr = (struct ieee80211_hdr *) skb->data;
760 if (ok) {
761 spin_lock(&ap->sta_table_lock);
762 sta = ap_get_sta(ap, hdr->addr1);
763 if (sta)
764 sta->flags &= ~WLAN_STA_PENDING_POLL;
765 spin_unlock(&ap->sta_table_lock);
766 } else {
767 PDEBUG(DEBUG_AP,
768 "%s: STA %pM did not ACK activity poll frame\n",
769 ap->local->dev->name, hdr->addr1);
770 }
771
772 fail:
773 dev_kfree_skb(skb);
774 }
775 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
776
777
778 void hostap_init_data(local_info_t *local)
779 {
780 struct ap_data *ap = local->ap;
781
782 if (ap == NULL) {
783 printk(KERN_WARNING "hostap_init_data: ap == NULL\n");
784 return;
785 }
786 memset(ap, 0, sizeof(struct ap_data));
787 ap->local = local;
788
789 ap->ap_policy = GET_INT_PARM(other_ap_policy, local->card_idx);
790 ap->bridge_packets = GET_INT_PARM(ap_bridge_packets, local->card_idx);
791 ap->max_inactivity =
792 GET_INT_PARM(ap_max_inactivity, local->card_idx) * HZ;
793 ap->autom_ap_wds = GET_INT_PARM(autom_ap_wds, local->card_idx);
794
795 spin_lock_init(&ap->sta_table_lock);
796 INIT_LIST_HEAD(&ap->sta_list);
797
798 /* Initialize task queue structure for AP management */
799 INIT_WORK(&local->ap->add_sta_proc_queue, handle_add_proc_queue);
800
801 ap->tx_callback_idx =
802 hostap_tx_callback_register(local, hostap_ap_tx_cb, ap);
803 if (ap->tx_callback_idx == 0)
804 printk(KERN_WARNING "%s: failed to register TX callback for "
805 "AP\n", local->dev->name);
806 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
807 INIT_WORK(&local->ap->wds_oper_queue, handle_wds_oper_queue);
808
809 ap->tx_callback_auth =
810 hostap_tx_callback_register(local, hostap_ap_tx_cb_auth, ap);
811 ap->tx_callback_assoc =
812 hostap_tx_callback_register(local, hostap_ap_tx_cb_assoc, ap);
813 ap->tx_callback_poll =
814 hostap_tx_callback_register(local, hostap_ap_tx_cb_poll, ap);
815 if (ap->tx_callback_auth == 0 || ap->tx_callback_assoc == 0 ||
816 ap->tx_callback_poll == 0)
817 printk(KERN_WARNING "%s: failed to register TX callback for "
818 "AP\n", local->dev->name);
819
820 spin_lock_init(&ap->mac_restrictions.lock);
821 INIT_LIST_HEAD(&ap->mac_restrictions.mac_list);
822 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
823
824 ap->initialized = 1;
825 }
826
827
828 void hostap_init_ap_proc(local_info_t *local)
829 {
830 struct ap_data *ap = local->ap;
831
832 ap->proc = local->proc;
833 if (ap->proc == NULL)
834 return;
835
836 #ifndef PRISM2_NO_PROCFS_DEBUG
837 create_proc_read_entry("ap_debug", 0, ap->proc,
838 ap_debug_proc_read, ap);
839 #endif /* PRISM2_NO_PROCFS_DEBUG */
840
841 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
842 create_proc_read_entry("ap_control", 0, ap->proc,
843 ap_control_proc_read, ap);
844 create_proc_read_entry("ap", 0, ap->proc,
845 prism2_ap_proc_read, ap);
846 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
847
848 }
849
850
851 void hostap_free_data(struct ap_data *ap)
852 {
853 struct sta_info *n, *sta;
854
855 if (ap == NULL || !ap->initialized) {
856 printk(KERN_DEBUG "hostap_free_data: ap has not yet been "
857 "initialized - skip resource freeing\n");
858 return;
859 }
860
861 flush_work_sync(&ap->add_sta_proc_queue);
862
863 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
864 flush_work_sync(&ap->wds_oper_queue);
865 if (ap->crypt)
866 ap->crypt->deinit(ap->crypt_priv);
867 ap->crypt = ap->crypt_priv = NULL;
868 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
869
870 list_for_each_entry_safe(sta, n, &ap->sta_list, list) {
871 ap_sta_hash_del(ap, sta);
872 list_del(&sta->list);
873 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
874 hostap_event_expired_sta(sta->local->dev, sta);
875 ap_free_sta(ap, sta);
876 }
877
878 #ifndef PRISM2_NO_PROCFS_DEBUG
879 if (ap->proc != NULL) {
880 remove_proc_entry("ap_debug", ap->proc);
881 }
882 #endif /* PRISM2_NO_PROCFS_DEBUG */
883
884 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
885 if (ap->proc != NULL) {
886 remove_proc_entry("ap", ap->proc);
887 remove_proc_entry("ap_control", ap->proc);
888 }
889 ap_control_flush_macs(&ap->mac_restrictions);
890 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
891
892 ap->initialized = 0;
893 }
894
895
896 /* caller should have mutex for AP STA list handling */
897 static struct sta_info* ap_get_sta(struct ap_data *ap, u8 *sta)
898 {
899 struct sta_info *s;
900
901 s = ap->sta_hash[STA_HASH(sta)];
902 while (s != NULL && memcmp(s->addr, sta, ETH_ALEN) != 0)
903 s = s->hnext;
904 return s;
905 }
906
907
908 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
909
910 /* Called from timer handler and from scheduled AP queue handlers */
911 static void prism2_send_mgmt(struct net_device *dev,
912 u16 type_subtype, char *body,
913 int body_len, u8 *addr, u16 tx_cb_idx)
914 {
915 struct hostap_interface *iface;
916 local_info_t *local;
917 struct ieee80211_hdr *hdr;
918 u16 fc;
919 struct sk_buff *skb;
920 struct hostap_skb_tx_data *meta;
921 int hdrlen;
922
923 iface = netdev_priv(dev);
924 local = iface->local;
925 dev = local->dev; /* always use master radio device */
926 iface = netdev_priv(dev);
927
928 if (!(dev->flags & IFF_UP)) {
929 PDEBUG(DEBUG_AP, "%s: prism2_send_mgmt - device is not UP - "
930 "cannot send frame\n", dev->name);
931 return;
932 }
933
934 skb = dev_alloc_skb(sizeof(*hdr) + body_len);
935 if (skb == NULL) {
936 PDEBUG(DEBUG_AP, "%s: prism2_send_mgmt failed to allocate "
937 "skb\n", dev->name);
938 return;
939 }
940
941 fc = type_subtype;
942 hdrlen = hostap_80211_get_hdrlen(cpu_to_le16(type_subtype));
943 hdr = (struct ieee80211_hdr *) skb_put(skb, hdrlen);
944 if (body)
945 memcpy(skb_put(skb, body_len), body, body_len);
946
947 memset(hdr, 0, hdrlen);
948
949 /* FIX: ctrl::ack sending used special HFA384X_TX_CTRL_802_11
950 * tx_control instead of using local->tx_control */
951
952
953 memcpy(hdr->addr1, addr, ETH_ALEN); /* DA / RA */
954 if (ieee80211_is_data(hdr->frame_control)) {
955 fc |= IEEE80211_FCTL_FROMDS;
956 memcpy(hdr->addr2, dev->dev_addr, ETH_ALEN); /* BSSID */
957 memcpy(hdr->addr3, dev->dev_addr, ETH_ALEN); /* SA */
958 } else if (ieee80211_is_ctl(hdr->frame_control)) {
959 /* control:ACK does not have addr2 or addr3 */
960 memset(hdr->addr2, 0, ETH_ALEN);
961 memset(hdr->addr3, 0, ETH_ALEN);
962 } else {
963 memcpy(hdr->addr2, dev->dev_addr, ETH_ALEN); /* SA */
964 memcpy(hdr->addr3, dev->dev_addr, ETH_ALEN); /* BSSID */
965 }
966
967 hdr->frame_control = cpu_to_le16(fc);
968
969 meta = (struct hostap_skb_tx_data *) skb->cb;
970 memset(meta, 0, sizeof(*meta));
971 meta->magic = HOSTAP_SKB_TX_DATA_MAGIC;
972 meta->iface = iface;
973 meta->tx_cb_idx = tx_cb_idx;
974
975 skb->dev = dev;
976 skb_reset_mac_header(skb);
977 skb_reset_network_header(skb);
978 dev_queue_xmit(skb);
979 }
980 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
981
982
983 static int prism2_sta_proc_read(char *page, char **start, off_t off,
984 int count, int *eof, void *data)
985 {
986 char *p = page;
987 struct sta_info *sta = (struct sta_info *) data;
988 int i;
989
990 /* FIX: possible race condition.. the STA data could have just expired,
991 * but proc entry was still here so that the read could have started;
992 * some locking should be done here.. */
993
994 if (off != 0) {
995 *eof = 1;
996 return 0;
997 }
998
999 p += sprintf(p, "%s=%pM\nusers=%d\naid=%d\n"
1000 "flags=0x%04x%s%s%s%s%s%s%s\n"
1001 "capability=0x%02x\nlisten_interval=%d\nsupported_rates=",
1002 sta->ap ? "AP" : "STA",
1003 sta->addr, atomic_read(&sta->users), sta->aid,
1004 sta->flags,
1005 sta->flags & WLAN_STA_AUTH ? " AUTH" : "",
1006 sta->flags & WLAN_STA_ASSOC ? " ASSOC" : "",
1007 sta->flags & WLAN_STA_PS ? " PS" : "",
1008 sta->flags & WLAN_STA_TIM ? " TIM" : "",
1009 sta->flags & WLAN_STA_PERM ? " PERM" : "",
1010 sta->flags & WLAN_STA_AUTHORIZED ? " AUTHORIZED" : "",
1011 sta->flags & WLAN_STA_PENDING_POLL ? " POLL" : "",
1012 sta->capability, sta->listen_interval);
1013 /* supported_rates: 500 kbit/s units with msb ignored */
1014 for (i = 0; i < sizeof(sta->supported_rates); i++)
1015 if (sta->supported_rates[i] != 0)
1016 p += sprintf(p, "%d%sMbps ",
1017 (sta->supported_rates[i] & 0x7f) / 2,
1018 sta->supported_rates[i] & 1 ? ".5" : "");
1019 p += sprintf(p, "\njiffies=%lu\nlast_auth=%lu\nlast_assoc=%lu\n"
1020 "last_rx=%lu\nlast_tx=%lu\nrx_packets=%lu\n"
1021 "tx_packets=%lu\n"
1022 "rx_bytes=%lu\ntx_bytes=%lu\nbuffer_count=%d\n"
1023 "last_rx: silence=%d dBm signal=%d dBm rate=%d%s Mbps\n"
1024 "tx_rate=%d\ntx[1M]=%d\ntx[2M]=%d\ntx[5.5M]=%d\n"
1025 "tx[11M]=%d\n"
1026 "rx[1M]=%d\nrx[2M]=%d\nrx[5.5M]=%d\nrx[11M]=%d\n",
1027 jiffies, sta->last_auth, sta->last_assoc, sta->last_rx,
1028 sta->last_tx,
1029 sta->rx_packets, sta->tx_packets, sta->rx_bytes,
1030 sta->tx_bytes, skb_queue_len(&sta->tx_buf),
1031 sta->last_rx_silence,
1032 sta->last_rx_signal, sta->last_rx_rate / 10,
1033 sta->last_rx_rate % 10 ? ".5" : "",
1034 sta->tx_rate, sta->tx_count[0], sta->tx_count[1],
1035 sta->tx_count[2], sta->tx_count[3], sta->rx_count[0],
1036 sta->rx_count[1], sta->rx_count[2], sta->rx_count[3]);
1037 if (sta->crypt && sta->crypt->ops && sta->crypt->ops->print_stats)
1038 p = sta->crypt->ops->print_stats(p, sta->crypt->priv);
1039 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1040 if (sta->ap) {
1041 if (sta->u.ap.channel >= 0)
1042 p += sprintf(p, "channel=%d\n", sta->u.ap.channel);
1043 p += sprintf(p, "ssid=");
1044 for (i = 0; i < sta->u.ap.ssid_len; i++)
1045 p += sprintf(p, ((sta->u.ap.ssid[i] >= 32 &&
1046 sta->u.ap.ssid[i] < 127) ?
1047 "%c" : "<%02x>"),
1048 sta->u.ap.ssid[i]);
1049 p += sprintf(p, "\n");
1050 }
1051 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1052
1053 return (p - page);
1054 }
1055
1056
1057 static void handle_add_proc_queue(struct work_struct *work)
1058 {
1059 struct ap_data *ap = container_of(work, struct ap_data,
1060 add_sta_proc_queue);
1061 struct sta_info *sta;
1062 char name[20];
1063 struct add_sta_proc_data *entry, *prev;
1064
1065 entry = ap->add_sta_proc_entries;
1066 ap->add_sta_proc_entries = NULL;
1067
1068 while (entry) {
1069 spin_lock_bh(&ap->sta_table_lock);
1070 sta = ap_get_sta(ap, entry->addr);
1071 if (sta)
1072 atomic_inc(&sta->users);
1073 spin_unlock_bh(&ap->sta_table_lock);
1074
1075 if (sta) {
1076 sprintf(name, "%pM", sta->addr);
1077 sta->proc = create_proc_read_entry(
1078 name, 0, ap->proc,
1079 prism2_sta_proc_read, sta);
1080
1081 atomic_dec(&sta->users);
1082 }
1083
1084 prev = entry;
1085 entry = entry->next;
1086 kfree(prev);
1087 }
1088 }
1089
1090
1091 static struct sta_info * ap_add_sta(struct ap_data *ap, u8 *addr)
1092 {
1093 struct sta_info *sta;
1094
1095 sta = kzalloc(sizeof(struct sta_info), GFP_ATOMIC);
1096 if (sta == NULL) {
1097 PDEBUG(DEBUG_AP, "AP: kmalloc failed\n");
1098 return NULL;
1099 }
1100
1101 /* initialize STA info data */
1102 sta->local = ap->local;
1103 skb_queue_head_init(&sta->tx_buf);
1104 memcpy(sta->addr, addr, ETH_ALEN);
1105
1106 atomic_inc(&sta->users);
1107 spin_lock_bh(&ap->sta_table_lock);
1108 list_add(&sta->list, &ap->sta_list);
1109 ap->num_sta++;
1110 ap_sta_hash_add(ap, sta);
1111 spin_unlock_bh(&ap->sta_table_lock);
1112
1113 if (ap->proc) {
1114 struct add_sta_proc_data *entry;
1115 /* schedule a non-interrupt context process to add a procfs
1116 * entry for the STA since procfs code use GFP_KERNEL */
1117 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
1118 if (entry) {
1119 memcpy(entry->addr, sta->addr, ETH_ALEN);
1120 entry->next = ap->add_sta_proc_entries;
1121 ap->add_sta_proc_entries = entry;
1122 schedule_work(&ap->add_sta_proc_queue);
1123 } else
1124 printk(KERN_DEBUG "Failed to add STA proc data\n");
1125 }
1126
1127 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1128 init_timer(&sta->timer);
1129 sta->timer.expires = jiffies + ap->max_inactivity;
1130 sta->timer.data = (unsigned long) sta;
1131 sta->timer.function = ap_handle_timer;
1132 if (!ap->local->hostapd)
1133 add_timer(&sta->timer);
1134 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1135
1136 return sta;
1137 }
1138
1139
1140 static int ap_tx_rate_ok(int rateidx, struct sta_info *sta,
1141 local_info_t *local)
1142 {
1143 if (rateidx > sta->tx_max_rate ||
1144 !(sta->tx_supp_rates & (1 << rateidx)))
1145 return 0;
1146
1147 if (local->tx_rate_control != 0 &&
1148 !(local->tx_rate_control & (1 << rateidx)))
1149 return 0;
1150
1151 return 1;
1152 }
1153
1154
1155 static void prism2_check_tx_rates(struct sta_info *sta)
1156 {
1157 int i;
1158
1159 sta->tx_supp_rates = 0;
1160 for (i = 0; i < sizeof(sta->supported_rates); i++) {
1161 if ((sta->supported_rates[i] & 0x7f) == 2)
1162 sta->tx_supp_rates |= WLAN_RATE_1M;
1163 if ((sta->supported_rates[i] & 0x7f) == 4)
1164 sta->tx_supp_rates |= WLAN_RATE_2M;
1165 if ((sta->supported_rates[i] & 0x7f) == 11)
1166 sta->tx_supp_rates |= WLAN_RATE_5M5;
1167 if ((sta->supported_rates[i] & 0x7f) == 22)
1168 sta->tx_supp_rates |= WLAN_RATE_11M;
1169 }
1170 sta->tx_max_rate = sta->tx_rate = sta->tx_rate_idx = 0;
1171 if (sta->tx_supp_rates & WLAN_RATE_1M) {
1172 sta->tx_max_rate = 0;
1173 if (ap_tx_rate_ok(0, sta, sta->local)) {
1174 sta->tx_rate = 10;
1175 sta->tx_rate_idx = 0;
1176 }
1177 }
1178 if (sta->tx_supp_rates & WLAN_RATE_2M) {
1179 sta->tx_max_rate = 1;
1180 if (ap_tx_rate_ok(1, sta, sta->local)) {
1181 sta->tx_rate = 20;
1182 sta->tx_rate_idx = 1;
1183 }
1184 }
1185 if (sta->tx_supp_rates & WLAN_RATE_5M5) {
1186 sta->tx_max_rate = 2;
1187 if (ap_tx_rate_ok(2, sta, sta->local)) {
1188 sta->tx_rate = 55;
1189 sta->tx_rate_idx = 2;
1190 }
1191 }
1192 if (sta->tx_supp_rates & WLAN_RATE_11M) {
1193 sta->tx_max_rate = 3;
1194 if (ap_tx_rate_ok(3, sta, sta->local)) {
1195 sta->tx_rate = 110;
1196 sta->tx_rate_idx = 3;
1197 }
1198 }
1199 }
1200
1201
1202 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1203
1204 static void ap_crypt_init(struct ap_data *ap)
1205 {
1206 ap->crypt = lib80211_get_crypto_ops("WEP");
1207
1208 if (ap->crypt) {
1209 if (ap->crypt->init) {
1210 ap->crypt_priv = ap->crypt->init(0);
1211 if (ap->crypt_priv == NULL)
1212 ap->crypt = NULL;
1213 else {
1214 u8 key[WEP_KEY_LEN];
1215 get_random_bytes(key, WEP_KEY_LEN);
1216 ap->crypt->set_key(key, WEP_KEY_LEN, NULL,
1217 ap->crypt_priv);
1218 }
1219 }
1220 }
1221
1222 if (ap->crypt == NULL) {
1223 printk(KERN_WARNING "AP could not initialize WEP: load module "
1224 "lib80211_crypt_wep.ko\n");
1225 }
1226 }
1227
1228
1229 /* Generate challenge data for shared key authentication. IEEE 802.11 specifies
1230 * that WEP algorithm is used for generating challenge. This should be unique,
1231 * but otherwise there is not really need for randomness etc. Initialize WEP
1232 * with pseudo random key and then use increasing IV to get unique challenge
1233 * streams.
1234 *
1235 * Called only as a scheduled task for pending AP frames.
1236 */
1237 static char * ap_auth_make_challenge(struct ap_data *ap)
1238 {
1239 char *tmpbuf;
1240 struct sk_buff *skb;
1241
1242 if (ap->crypt == NULL) {
1243 ap_crypt_init(ap);
1244 if (ap->crypt == NULL)
1245 return NULL;
1246 }
1247
1248 tmpbuf = kmalloc(WLAN_AUTH_CHALLENGE_LEN, GFP_ATOMIC);
1249 if (tmpbuf == NULL) {
1250 PDEBUG(DEBUG_AP, "AP: kmalloc failed for challenge\n");
1251 return NULL;
1252 }
1253
1254 skb = dev_alloc_skb(WLAN_AUTH_CHALLENGE_LEN +
1255 ap->crypt->extra_mpdu_prefix_len +
1256 ap->crypt->extra_mpdu_postfix_len);
1257 if (skb == NULL) {
1258 kfree(tmpbuf);
1259 return NULL;
1260 }
1261
1262 skb_reserve(skb, ap->crypt->extra_mpdu_prefix_len);
1263 memset(skb_put(skb, WLAN_AUTH_CHALLENGE_LEN), 0,
1264 WLAN_AUTH_CHALLENGE_LEN);
1265 if (ap->crypt->encrypt_mpdu(skb, 0, ap->crypt_priv)) {
1266 dev_kfree_skb(skb);
1267 kfree(tmpbuf);
1268 return NULL;
1269 }
1270
1271 skb_copy_from_linear_data_offset(skb, ap->crypt->extra_mpdu_prefix_len,
1272 tmpbuf, WLAN_AUTH_CHALLENGE_LEN);
1273 dev_kfree_skb(skb);
1274
1275 return tmpbuf;
1276 }
1277
1278
1279 /* Called only as a scheduled task for pending AP frames. */
1280 static void handle_authen(local_info_t *local, struct sk_buff *skb,
1281 struct hostap_80211_rx_status *rx_stats)
1282 {
1283 struct net_device *dev = local->dev;
1284 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1285 size_t hdrlen;
1286 struct ap_data *ap = local->ap;
1287 char body[8 + WLAN_AUTH_CHALLENGE_LEN], *challenge = NULL;
1288 int len, olen;
1289 u16 auth_alg, auth_transaction, status_code;
1290 __le16 *pos;
1291 u16 resp = WLAN_STATUS_SUCCESS;
1292 struct sta_info *sta = NULL;
1293 struct lib80211_crypt_data *crypt;
1294 char *txt = "";
1295
1296 len = skb->len - IEEE80211_MGMT_HDR_LEN;
1297
1298 hdrlen = hostap_80211_get_hdrlen(hdr->frame_control);
1299
1300 if (len < 6) {
1301 PDEBUG(DEBUG_AP, "%s: handle_authen - too short payload "
1302 "(len=%d) from %pM\n", dev->name, len, hdr->addr2);
1303 return;
1304 }
1305
1306 spin_lock_bh(&local->ap->sta_table_lock);
1307 sta = ap_get_sta(local->ap, hdr->addr2);
1308 if (sta)
1309 atomic_inc(&sta->users);
1310 spin_unlock_bh(&local->ap->sta_table_lock);
1311
1312 if (sta && sta->crypt)
1313 crypt = sta->crypt;
1314 else {
1315 int idx = 0;
1316 if (skb->len >= hdrlen + 3)
1317 idx = skb->data[hdrlen + 3] >> 6;
1318 crypt = local->crypt_info.crypt[idx];
1319 }
1320
1321 pos = (__le16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
1322 auth_alg = __le16_to_cpu(*pos);
1323 pos++;
1324 auth_transaction = __le16_to_cpu(*pos);
1325 pos++;
1326 status_code = __le16_to_cpu(*pos);
1327 pos++;
1328
1329 if (memcmp(dev->dev_addr, hdr->addr2, ETH_ALEN) == 0 ||
1330 ap_control_mac_deny(&ap->mac_restrictions, hdr->addr2)) {
1331 txt = "authentication denied";
1332 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1333 goto fail;
1334 }
1335
1336 if (((local->auth_algs & PRISM2_AUTH_OPEN) &&
1337 auth_alg == WLAN_AUTH_OPEN) ||
1338 ((local->auth_algs & PRISM2_AUTH_SHARED_KEY) &&
1339 crypt && auth_alg == WLAN_AUTH_SHARED_KEY)) {
1340 } else {
1341 txt = "unsupported algorithm";
1342 resp = WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG;
1343 goto fail;
1344 }
1345
1346 if (len >= 8) {
1347 u8 *u = (u8 *) pos;
1348 if (*u == WLAN_EID_CHALLENGE) {
1349 if (*(u + 1) != WLAN_AUTH_CHALLENGE_LEN) {
1350 txt = "invalid challenge len";
1351 resp = WLAN_STATUS_CHALLENGE_FAIL;
1352 goto fail;
1353 }
1354 if (len - 8 < WLAN_AUTH_CHALLENGE_LEN) {
1355 txt = "challenge underflow";
1356 resp = WLAN_STATUS_CHALLENGE_FAIL;
1357 goto fail;
1358 }
1359 challenge = (char *) (u + 2);
1360 }
1361 }
1362
1363 if (sta && sta->ap) {
1364 if (time_after(jiffies, sta->u.ap.last_beacon +
1365 (10 * sta->listen_interval * HZ) / 1024)) {
1366 PDEBUG(DEBUG_AP, "%s: no beacons received for a while,"
1367 " assuming AP %pM is now STA\n",
1368 dev->name, sta->addr);
1369 sta->ap = 0;
1370 sta->flags = 0;
1371 sta->u.sta.challenge = NULL;
1372 } else {
1373 txt = "AP trying to authenticate?";
1374 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1375 goto fail;
1376 }
1377 }
1378
1379 if ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 1) ||
1380 (auth_alg == WLAN_AUTH_SHARED_KEY &&
1381 (auth_transaction == 1 ||
1382 (auth_transaction == 3 && sta != NULL &&
1383 sta->u.sta.challenge != NULL)))) {
1384 } else {
1385 txt = "unknown authentication transaction number";
1386 resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION;
1387 goto fail;
1388 }
1389
1390 if (sta == NULL) {
1391 txt = "new STA";
1392
1393 if (local->ap->num_sta >= MAX_STA_COUNT) {
1394 /* FIX: might try to remove some old STAs first? */
1395 txt = "no more room for new STAs";
1396 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1397 goto fail;
1398 }
1399
1400 sta = ap_add_sta(local->ap, hdr->addr2);
1401 if (sta == NULL) {
1402 txt = "ap_add_sta failed";
1403 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1404 goto fail;
1405 }
1406 }
1407
1408 switch (auth_alg) {
1409 case WLAN_AUTH_OPEN:
1410 txt = "authOK";
1411 /* IEEE 802.11 standard is not completely clear about
1412 * whether STA is considered authenticated after
1413 * authentication OK frame has been send or after it
1414 * has been ACKed. In order to reduce interoperability
1415 * issues, mark the STA authenticated before ACK. */
1416 sta->flags |= WLAN_STA_AUTH;
1417 break;
1418
1419 case WLAN_AUTH_SHARED_KEY:
1420 if (auth_transaction == 1) {
1421 if (sta->u.sta.challenge == NULL) {
1422 sta->u.sta.challenge =
1423 ap_auth_make_challenge(local->ap);
1424 if (sta->u.sta.challenge == NULL) {
1425 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1426 goto fail;
1427 }
1428 }
1429 } else {
1430 if (sta->u.sta.challenge == NULL ||
1431 challenge == NULL ||
1432 memcmp(sta->u.sta.challenge, challenge,
1433 WLAN_AUTH_CHALLENGE_LEN) != 0 ||
1434 !ieee80211_has_protected(hdr->frame_control)) {
1435 txt = "challenge response incorrect";
1436 resp = WLAN_STATUS_CHALLENGE_FAIL;
1437 goto fail;
1438 }
1439
1440 txt = "challenge OK - authOK";
1441 /* IEEE 802.11 standard is not completely clear about
1442 * whether STA is considered authenticated after
1443 * authentication OK frame has been send or after it
1444 * has been ACKed. In order to reduce interoperability
1445 * issues, mark the STA authenticated before ACK. */
1446 sta->flags |= WLAN_STA_AUTH;
1447 kfree(sta->u.sta.challenge);
1448 sta->u.sta.challenge = NULL;
1449 }
1450 break;
1451 }
1452
1453 fail:
1454 pos = (__le16 *) body;
1455 *pos = cpu_to_le16(auth_alg);
1456 pos++;
1457 *pos = cpu_to_le16(auth_transaction + 1);
1458 pos++;
1459 *pos = cpu_to_le16(resp); /* status_code */
1460 pos++;
1461 olen = 6;
1462
1463 if (resp == WLAN_STATUS_SUCCESS && sta != NULL &&
1464 sta->u.sta.challenge != NULL &&
1465 auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 1) {
1466 u8 *tmp = (u8 *) pos;
1467 *tmp++ = WLAN_EID_CHALLENGE;
1468 *tmp++ = WLAN_AUTH_CHALLENGE_LEN;
1469 pos++;
1470 memcpy(pos, sta->u.sta.challenge, WLAN_AUTH_CHALLENGE_LEN);
1471 olen += 2 + WLAN_AUTH_CHALLENGE_LEN;
1472 }
1473
1474 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_AUTH,
1475 body, olen, hdr->addr2, ap->tx_callback_auth);
1476
1477 if (sta) {
1478 sta->last_rx = jiffies;
1479 atomic_dec(&sta->users);
1480 }
1481
1482 if (resp) {
1483 PDEBUG(DEBUG_AP, "%s: %pM auth (alg=%d "
1484 "trans#=%d stat=%d len=%d fc=%04x) ==> %d (%s)\n",
1485 dev->name, hdr->addr2,
1486 auth_alg, auth_transaction, status_code, len,
1487 le16_to_cpu(hdr->frame_control), resp, txt);
1488 }
1489 }
1490
1491
1492 /* Called only as a scheduled task for pending AP frames. */
1493 static void handle_assoc(local_info_t *local, struct sk_buff *skb,
1494 struct hostap_80211_rx_status *rx_stats, int reassoc)
1495 {
1496 struct net_device *dev = local->dev;
1497 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1498 char body[12], *p, *lpos;
1499 int len, left;
1500 __le16 *pos;
1501 u16 resp = WLAN_STATUS_SUCCESS;
1502 struct sta_info *sta = NULL;
1503 int send_deauth = 0;
1504 char *txt = "";
1505 u8 prev_ap[ETH_ALEN];
1506
1507 left = len = skb->len - IEEE80211_MGMT_HDR_LEN;
1508
1509 if (len < (reassoc ? 10 : 4)) {
1510 PDEBUG(DEBUG_AP, "%s: handle_assoc - too short payload "
1511 "(len=%d, reassoc=%d) from %pM\n",
1512 dev->name, len, reassoc, hdr->addr2);
1513 return;
1514 }
1515
1516 spin_lock_bh(&local->ap->sta_table_lock);
1517 sta = ap_get_sta(local->ap, hdr->addr2);
1518 if (sta == NULL || (sta->flags & WLAN_STA_AUTH) == 0) {
1519 spin_unlock_bh(&local->ap->sta_table_lock);
1520 txt = "trying to associate before authentication";
1521 send_deauth = 1;
1522 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1523 sta = NULL; /* do not decrement sta->users */
1524 goto fail;
1525 }
1526 atomic_inc(&sta->users);
1527 spin_unlock_bh(&local->ap->sta_table_lock);
1528
1529 pos = (__le16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
1530 sta->capability = __le16_to_cpu(*pos);
1531 pos++; left -= 2;
1532 sta->listen_interval = __le16_to_cpu(*pos);
1533 pos++; left -= 2;
1534
1535 if (reassoc) {
1536 memcpy(prev_ap, pos, ETH_ALEN);
1537 pos++; pos++; pos++; left -= 6;
1538 } else
1539 memset(prev_ap, 0, ETH_ALEN);
1540
1541 if (left >= 2) {
1542 unsigned int ileft;
1543 unsigned char *u = (unsigned char *) pos;
1544
1545 if (*u == WLAN_EID_SSID) {
1546 u++; left--;
1547 ileft = *u;
1548 u++; left--;
1549
1550 if (ileft > left || ileft > MAX_SSID_LEN) {
1551 txt = "SSID overflow";
1552 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1553 goto fail;
1554 }
1555
1556 if (ileft != strlen(local->essid) ||
1557 memcmp(local->essid, u, ileft) != 0) {
1558 txt = "not our SSID";
1559 resp = WLAN_STATUS_ASSOC_DENIED_UNSPEC;
1560 goto fail;
1561 }
1562
1563 u += ileft;
1564 left -= ileft;
1565 }
1566
1567 if (left >= 2 && *u == WLAN_EID_SUPP_RATES) {
1568 u++; left--;
1569 ileft = *u;
1570 u++; left--;
1571
1572 if (ileft > left || ileft == 0 ||
1573 ileft > WLAN_SUPP_RATES_MAX) {
1574 txt = "SUPP_RATES len error";
1575 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1576 goto fail;
1577 }
1578
1579 memset(sta->supported_rates, 0,
1580 sizeof(sta->supported_rates));
1581 memcpy(sta->supported_rates, u, ileft);
1582 prism2_check_tx_rates(sta);
1583
1584 u += ileft;
1585 left -= ileft;
1586 }
1587
1588 if (left > 0) {
1589 PDEBUG(DEBUG_AP, "%s: assoc from %pM"
1590 " with extra data (%d bytes) [",
1591 dev->name, hdr->addr2, left);
1592 while (left > 0) {
1593 PDEBUG2(DEBUG_AP, "<%02x>", *u);
1594 u++; left--;
1595 }
1596 PDEBUG2(DEBUG_AP, "]\n");
1597 }
1598 } else {
1599 txt = "frame underflow";
1600 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1601 goto fail;
1602 }
1603
1604 /* get a unique AID */
1605 if (sta->aid > 0)
1606 txt = "OK, old AID";
1607 else {
1608 spin_lock_bh(&local->ap->sta_table_lock);
1609 for (sta->aid = 1; sta->aid <= MAX_AID_TABLE_SIZE; sta->aid++)
1610 if (local->ap->sta_aid[sta->aid - 1] == NULL)
1611 break;
1612 if (sta->aid > MAX_AID_TABLE_SIZE) {
1613 sta->aid = 0;
1614 spin_unlock_bh(&local->ap->sta_table_lock);
1615 resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
1616 txt = "no room for more AIDs";
1617 } else {
1618 local->ap->sta_aid[sta->aid - 1] = sta;
1619 spin_unlock_bh(&local->ap->sta_table_lock);
1620 txt = "OK, new AID";
1621 }
1622 }
1623
1624 fail:
1625 pos = (__le16 *) body;
1626
1627 if (send_deauth) {
1628 *pos = cpu_to_le16(WLAN_REASON_STA_REQ_ASSOC_WITHOUT_AUTH);
1629 pos++;
1630 } else {
1631 /* FIX: CF-Pollable and CF-PollReq should be set to match the
1632 * values in beacons/probe responses */
1633 /* FIX: how about privacy and WEP? */
1634 /* capability */
1635 *pos = cpu_to_le16(WLAN_CAPABILITY_ESS);
1636 pos++;
1637
1638 /* status_code */
1639 *pos = cpu_to_le16(resp);
1640 pos++;
1641
1642 *pos = cpu_to_le16((sta && sta->aid > 0 ? sta->aid : 0) |
1643 BIT(14) | BIT(15)); /* AID */
1644 pos++;
1645
1646 /* Supported rates (Information element) */
1647 p = (char *) pos;
1648 *p++ = WLAN_EID_SUPP_RATES;
1649 lpos = p;
1650 *p++ = 0; /* len */
1651 if (local->tx_rate_control & WLAN_RATE_1M) {
1652 *p++ = local->basic_rates & WLAN_RATE_1M ? 0x82 : 0x02;
1653 (*lpos)++;
1654 }
1655 if (local->tx_rate_control & WLAN_RATE_2M) {
1656 *p++ = local->basic_rates & WLAN_RATE_2M ? 0x84 : 0x04;
1657 (*lpos)++;
1658 }
1659 if (local->tx_rate_control & WLAN_RATE_5M5) {
1660 *p++ = local->basic_rates & WLAN_RATE_5M5 ?
1661 0x8b : 0x0b;
1662 (*lpos)++;
1663 }
1664 if (local->tx_rate_control & WLAN_RATE_11M) {
1665 *p++ = local->basic_rates & WLAN_RATE_11M ?
1666 0x96 : 0x16;
1667 (*lpos)++;
1668 }
1669 pos = (__le16 *) p;
1670 }
1671
1672 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT |
1673 (send_deauth ? IEEE80211_STYPE_DEAUTH :
1674 (reassoc ? IEEE80211_STYPE_REASSOC_RESP :
1675 IEEE80211_STYPE_ASSOC_RESP)),
1676 body, (u8 *) pos - (u8 *) body,
1677 hdr->addr2,
1678 send_deauth ? 0 : local->ap->tx_callback_assoc);
1679
1680 if (sta) {
1681 if (resp == WLAN_STATUS_SUCCESS) {
1682 sta->last_rx = jiffies;
1683 /* STA will be marked associated from TX callback, if
1684 * AssocResp is ACKed */
1685 }
1686 atomic_dec(&sta->users);
1687 }
1688
1689 #if 0
1690 PDEBUG(DEBUG_AP, "%s: %pM %sassoc (len=%d "
1691 "prev_ap=%pM) => %d(%d) (%s)\n",
1692 dev->name,
1693 hdr->addr2,
1694 reassoc ? "re" : "", len,
1695 prev_ap,
1696 resp, send_deauth, txt);
1697 #endif
1698 }
1699
1700
1701 /* Called only as a scheduled task for pending AP frames. */
1702 static void handle_deauth(local_info_t *local, struct sk_buff *skb,
1703 struct hostap_80211_rx_status *rx_stats)
1704 {
1705 struct net_device *dev = local->dev;
1706 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1707 char *body = (char *) (skb->data + IEEE80211_MGMT_HDR_LEN);
1708 int len;
1709 u16 reason_code;
1710 __le16 *pos;
1711 struct sta_info *sta = NULL;
1712
1713 len = skb->len - IEEE80211_MGMT_HDR_LEN;
1714
1715 if (len < 2) {
1716 printk("handle_deauth - too short payload (len=%d)\n", len);
1717 return;
1718 }
1719
1720 pos = (__le16 *) body;
1721 reason_code = le16_to_cpu(*pos);
1722
1723 PDEBUG(DEBUG_AP, "%s: deauthentication: %pM len=%d, "
1724 "reason_code=%d\n", dev->name, hdr->addr2,
1725 len, reason_code);
1726
1727 spin_lock_bh(&local->ap->sta_table_lock);
1728 sta = ap_get_sta(local->ap, hdr->addr2);
1729 if (sta != NULL) {
1730 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap)
1731 hostap_event_expired_sta(local->dev, sta);
1732 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
1733 }
1734 spin_unlock_bh(&local->ap->sta_table_lock);
1735 if (sta == NULL) {
1736 printk("%s: deauthentication from %pM, "
1737 "reason_code=%d, but STA not authenticated\n", dev->name,
1738 hdr->addr2, reason_code);
1739 }
1740 }
1741
1742
1743 /* Called only as a scheduled task for pending AP frames. */
1744 static void handle_disassoc(local_info_t *local, struct sk_buff *skb,
1745 struct hostap_80211_rx_status *rx_stats)
1746 {
1747 struct net_device *dev = local->dev;
1748 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1749 char *body = skb->data + IEEE80211_MGMT_HDR_LEN;
1750 int len;
1751 u16 reason_code;
1752 __le16 *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 = (__le16 *) body;
1763 reason_code = le16_to_cpu(*pos);
1764
1765 PDEBUG(DEBUG_AP, "%s: disassociation: %pM len=%d, "
1766 "reason_code=%d\n", dev->name, hdr->addr2,
1767 len, 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 %pM, "
1779 "reason_code=%d, but STA not authenticated\n",
1780 dev->name, 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 *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 *hdr)
1805 {
1806 struct net_device *dev = local->dev;
1807 struct sta_info *sta;
1808 __le16 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 = cpu_to_le16(WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
1823 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT |
1824 ((sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) ?
1825 IEEE80211_STYPE_DEAUTH : IEEE80211_STYPE_DISASSOC),
1826 (char *) &reason, sizeof(reason), hdr->addr2, 0);
1827
1828 if (sta)
1829 atomic_dec(&sta->users);
1830 }
1831
1832 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1833
1834
1835 /* Called only as a scheduled task for pending AP frames. */
1836 static void pspoll_send_buffered(local_info_t *local, struct sta_info *sta,
1837 struct sk_buff *skb)
1838 {
1839 struct hostap_skb_tx_data *meta;
1840
1841 if (!(sta->flags & WLAN_STA_PS)) {
1842 /* Station has moved to non-PS mode, so send all buffered
1843 * frames using normal device queue. */
1844 dev_queue_xmit(skb);
1845 return;
1846 }
1847
1848 /* add a flag for hostap_handle_sta_tx() to know that this skb should
1849 * be passed through even though STA is using PS */
1850 meta = (struct hostap_skb_tx_data *) skb->cb;
1851 meta->flags |= HOSTAP_TX_FLAGS_BUFFERED_FRAME;
1852 if (!skb_queue_empty(&sta->tx_buf)) {
1853 /* indicate to STA that more frames follow */
1854 meta->flags |= HOSTAP_TX_FLAGS_ADD_MOREDATA;
1855 }
1856 dev_queue_xmit(skb);
1857 }
1858
1859
1860 /* Called only as a scheduled task for pending AP frames. */
1861 static void handle_pspoll(local_info_t *local,
1862 struct ieee80211_hdr *hdr,
1863 struct hostap_80211_rx_status *rx_stats)
1864 {
1865 struct net_device *dev = local->dev;
1866 struct sta_info *sta;
1867 u16 aid;
1868 struct sk_buff *skb;
1869
1870 PDEBUG(DEBUG_PS2, "handle_pspoll: BSSID=%pM, TA=%pM PWRMGT=%d\n",
1871 hdr->addr1, hdr->addr2, !!ieee80211_has_pm(hdr->frame_control));
1872
1873 if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN)) {
1874 PDEBUG(DEBUG_AP,
1875 "handle_pspoll - addr1(BSSID)=%pM not own MAC\n",
1876 hdr->addr1);
1877 return;
1878 }
1879
1880 aid = le16_to_cpu(hdr->duration_id);
1881 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) {
1882 PDEBUG(DEBUG_PS, " PSPOLL and AID[15:14] not set\n");
1883 return;
1884 }
1885 aid &= ~(BIT(15) | BIT(14));
1886 if (aid == 0 || aid > MAX_AID_TABLE_SIZE) {
1887 PDEBUG(DEBUG_PS, " invalid aid=%d\n", aid);
1888 return;
1889 }
1890 PDEBUG(DEBUG_PS2, " aid=%d\n", aid);
1891
1892 spin_lock_bh(&local->ap->sta_table_lock);
1893 sta = ap_get_sta(local->ap, hdr->addr2);
1894 if (sta)
1895 atomic_inc(&sta->users);
1896 spin_unlock_bh(&local->ap->sta_table_lock);
1897
1898 if (sta == NULL) {
1899 PDEBUG(DEBUG_PS, " STA not found\n");
1900 return;
1901 }
1902 if (sta->aid != aid) {
1903 PDEBUG(DEBUG_PS, " received aid=%i does not match with "
1904 "assoc.aid=%d\n", aid, sta->aid);
1905 return;
1906 }
1907
1908 /* FIX: todo:
1909 * - add timeout for buffering (clear aid in TIM vector if buffer timed
1910 * out (expiry time must be longer than ListenInterval for
1911 * the corresponding STA; "8802-11: 11.2.1.9 AP aging function"
1912 * - what to do, if buffered, pspolled, and sent frame is not ACKed by
1913 * sta; store buffer for later use and leave TIM aid bit set? use
1914 * TX event to check whether frame was ACKed?
1915 */
1916
1917 while ((skb = skb_dequeue(&sta->tx_buf)) != NULL) {
1918 /* send buffered frame .. */
1919 PDEBUG(DEBUG_PS2, "Sending buffered frame to STA after PS POLL"
1920 " (buffer_count=%d)\n", skb_queue_len(&sta->tx_buf));
1921
1922 pspoll_send_buffered(local, sta, skb);
1923
1924 if (sta->flags & WLAN_STA_PS) {
1925 /* send only one buffered packet per PS Poll */
1926 /* FIX: should ignore further PS Polls until the
1927 * buffered packet that was just sent is acknowledged
1928 * (Tx or TxExc event) */
1929 break;
1930 }
1931 }
1932
1933 if (skb_queue_empty(&sta->tx_buf)) {
1934 /* try to clear aid from TIM */
1935 if (!(sta->flags & WLAN_STA_TIM))
1936 PDEBUG(DEBUG_PS2, "Re-unsetting TIM for aid %d\n",
1937 aid);
1938 hostap_set_tim(local, aid, 0);
1939 sta->flags &= ~WLAN_STA_TIM;
1940 }
1941
1942 atomic_dec(&sta->users);
1943 }
1944
1945
1946 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1947
1948 static void handle_wds_oper_queue(struct work_struct *work)
1949 {
1950 struct ap_data *ap = container_of(work, struct ap_data,
1951 wds_oper_queue);
1952 local_info_t *local = ap->local;
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 %pM\n",
1963 local->dev->name,
1964 entry->type == WDS_ADD ? "adding" : "removing",
1965 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 *hdr = (struct ieee80211_hdr *) skb->data;
1983 char *body = skb->data + IEEE80211_MGMT_HDR_LEN;
1984 int len, left;
1985 u16 beacon_int, capability;
1986 __le16 *pos;
1987 char *ssid = NULL;
1988 unsigned char *supp_rates = NULL;
1989 int ssid_len = 0, supp_rates_len = 0;
1990 struct sta_info *sta = NULL;
1991 int new_sta = 0, channel = -1;
1992
1993 len = skb->len - IEEE80211_MGMT_HDR_LEN;
1994
1995 if (len < 8 + 2 + 2) {
1996 printk(KERN_DEBUG "handle_beacon - too short payload "
1997 "(len=%d)\n", len);
1998 return;
1999 }
2000
2001 pos = (__le16 *) body;
2002 left = len;
2003
2004 /* Timestamp (8 octets) */
2005 pos += 4; left -= 8;
2006 /* Beacon interval (2 octets) */
2007 beacon_int = le16_to_cpu(*pos);
2008 pos++; left -= 2;
2009 /* Capability information (2 octets) */
2010 capability = le16_to_cpu(*pos);
2011 pos++; left -= 2;
2012
2013 if (local->ap->ap_policy != AP_OTHER_AP_EVEN_IBSS &&
2014 capability & WLAN_CAPABILITY_IBSS)
2015 return;
2016
2017 if (left >= 2) {
2018 unsigned int ileft;
2019 unsigned char *u = (unsigned char *) pos;
2020
2021 if (*u == WLAN_EID_SSID) {
2022 u++; left--;
2023 ileft = *u;
2024 u++; left--;
2025
2026 if (ileft > left || ileft > MAX_SSID_LEN) {
2027 PDEBUG(DEBUG_AP, "SSID: overflow\n");
2028 return;
2029 }
2030
2031 if (local->ap->ap_policy == AP_OTHER_AP_SAME_SSID &&
2032 (ileft != strlen(local->essid) ||
2033 memcmp(local->essid, u, ileft) != 0)) {
2034 /* not our SSID */
2035 return;
2036 }
2037
2038 ssid = u;
2039 ssid_len = ileft;
2040
2041 u += ileft;
2042 left -= ileft;
2043 }
2044
2045 if (*u == WLAN_EID_SUPP_RATES) {
2046 u++; left--;
2047 ileft = *u;
2048 u++; left--;
2049
2050 if (ileft > left || ileft == 0 || ileft > 8) {
2051 PDEBUG(DEBUG_AP, " - SUPP_RATES len error\n");
2052 return;
2053 }
2054
2055 supp_rates = u;
2056 supp_rates_len = ileft;
2057
2058 u += ileft;
2059 left -= ileft;
2060 }
2061
2062 if (*u == WLAN_EID_DS_PARAMS) {
2063 u++; left--;
2064 ileft = *u;
2065 u++; left--;
2066
2067 if (ileft > left || ileft != 1) {
2068 PDEBUG(DEBUG_AP, " - DS_PARAMS len error\n");
2069 return;
2070 }
2071
2072 channel = *u;
2073
2074 u += ileft;
2075 left -= ileft;
2076 }
2077 }
2078
2079 spin_lock_bh(&local->ap->sta_table_lock);
2080 sta = ap_get_sta(local->ap, hdr->addr2);
2081 if (sta != NULL)
2082 atomic_inc(&sta->users);
2083 spin_unlock_bh(&local->ap->sta_table_lock);
2084
2085 if (sta == NULL) {
2086 /* add new AP */
2087 new_sta = 1;
2088 sta = ap_add_sta(local->ap, hdr->addr2);
2089 if (sta == NULL) {
2090 printk(KERN_INFO "prism2: kmalloc failed for AP "
2091 "data structure\n");
2092 return;
2093 }
2094 hostap_event_new_sta(local->dev, sta);
2095
2096 /* mark APs authentication and associated for pseudo ad-hoc
2097 * style communication */
2098 sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
2099
2100 if (local->ap->autom_ap_wds) {
2101 hostap_wds_link_oper(local, sta->addr, WDS_ADD);
2102 }
2103 }
2104
2105 sta->ap = 1;
2106 if (ssid) {
2107 sta->u.ap.ssid_len = ssid_len;
2108 memcpy(sta->u.ap.ssid, ssid, ssid_len);
2109 sta->u.ap.ssid[ssid_len] = '\0';
2110 } else {
2111 sta->u.ap.ssid_len = 0;
2112 sta->u.ap.ssid[0] = '\0';
2113 }
2114 sta->u.ap.channel = channel;
2115 sta->rx_packets++;
2116 sta->rx_bytes += len;
2117 sta->u.ap.last_beacon = sta->last_rx = jiffies;
2118 sta->capability = capability;
2119 sta->listen_interval = beacon_int;
2120
2121 atomic_dec(&sta->users);
2122
2123 if (new_sta) {
2124 memset(sta->supported_rates, 0, sizeof(sta->supported_rates));
2125 memcpy(sta->supported_rates, supp_rates, supp_rates_len);
2126 prism2_check_tx_rates(sta);
2127 }
2128 }
2129
2130 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2131
2132
2133 /* Called only as a tasklet. */
2134 static void handle_ap_item(local_info_t *local, struct sk_buff *skb,
2135 struct hostap_80211_rx_status *rx_stats)
2136 {
2137 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2138 struct net_device *dev = local->dev;
2139 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2140 u16 fc, type, stype;
2141 struct ieee80211_hdr *hdr;
2142
2143 /* FIX: should give skb->len to handler functions and check that the
2144 * buffer is long enough */
2145 hdr = (struct ieee80211_hdr *) skb->data;
2146 fc = le16_to_cpu(hdr->frame_control);
2147 type = fc & IEEE80211_FCTL_FTYPE;
2148 stype = fc & IEEE80211_FCTL_STYPE;
2149
2150 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2151 if (!local->hostapd && type == IEEE80211_FTYPE_DATA) {
2152 PDEBUG(DEBUG_AP, "handle_ap_item - data frame\n");
2153
2154 if (!(fc & IEEE80211_FCTL_TODS) ||
2155 (fc & IEEE80211_FCTL_FROMDS)) {
2156 if (stype == IEEE80211_STYPE_NULLFUNC) {
2157 /* no ToDS nullfunc seems to be used to check
2158 * AP association; so send reject message to
2159 * speed up re-association */
2160 ap_handle_dropped_data(local, hdr);
2161 goto done;
2162 }
2163 PDEBUG(DEBUG_AP, " not ToDS frame (fc=0x%04x)\n",
2164 fc);
2165 goto done;
2166 }
2167
2168 if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN)) {
2169 PDEBUG(DEBUG_AP, "handle_ap_item - addr1(BSSID)=%pM"
2170 " not own MAC\n", 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)=%pM"
2207 " not own MAC\n", 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)=%pM"
2213 " not own MAC\n", 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 struct ieee80211_hdr *hdr;
2261
2262 iface = netdev_priv(dev);
2263 local = iface->local;
2264
2265 if (skb->len < 16)
2266 goto drop;
2267
2268 dev->stats.rx_packets++;
2269
2270 hdr = (struct ieee80211_hdr *) skb->data;
2271
2272 if (local->ap->ap_policy == AP_OTHER_AP_SKIP_ALL &&
2273 ieee80211_is_beacon(hdr->frame_control))
2274 goto drop;
2275
2276 skb->protocol = cpu_to_be16(ETH_P_HOSTAP);
2277 handle_ap_item(local, skb, rx_stats);
2278 return;
2279
2280 drop:
2281 dev_kfree_skb(skb);
2282 }
2283
2284
2285 /* Called only as a tasklet (software IRQ) */
2286 static void schedule_packet_send(local_info_t *local, struct sta_info *sta)
2287 {
2288 struct sk_buff *skb;
2289 struct ieee80211_hdr *hdr;
2290 struct hostap_80211_rx_status rx_stats;
2291
2292 if (skb_queue_empty(&sta->tx_buf))
2293 return;
2294
2295 skb = dev_alloc_skb(16);
2296 if (skb == NULL) {
2297 printk(KERN_DEBUG "%s: schedule_packet_send: skb alloc "
2298 "failed\n", local->dev->name);
2299 return;
2300 }
2301
2302 hdr = (struct ieee80211_hdr *) skb_put(skb, 16);
2303
2304 /* Generate a fake pspoll frame to start packet delivery */
2305 hdr->frame_control = cpu_to_le16(
2306 IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL);
2307 memcpy(hdr->addr1, local->dev->dev_addr, ETH_ALEN);
2308 memcpy(hdr->addr2, sta->addr, ETH_ALEN);
2309 hdr->duration_id = cpu_to_le16(sta->aid | BIT(15) | BIT(14));
2310
2311 PDEBUG(DEBUG_PS2,
2312 "%s: Scheduling buffered packet delivery for STA %pM\n",
2313 local->dev->name, sta->addr);
2314
2315 skb->dev = local->dev;
2316
2317 memset(&rx_stats, 0, sizeof(rx_stats));
2318 hostap_rx(local->dev, skb, &rx_stats);
2319 }
2320
2321
2322 int prism2_ap_get_sta_qual(local_info_t *local, struct sockaddr addr[],
2323 struct iw_quality qual[], int buf_size,
2324 int aplist)
2325 {
2326 struct ap_data *ap = local->ap;
2327 struct list_head *ptr;
2328 int count = 0;
2329
2330 spin_lock_bh(&ap->sta_table_lock);
2331
2332 for (ptr = ap->sta_list.next; ptr != NULL && ptr != &ap->sta_list;
2333 ptr = ptr->next) {
2334 struct sta_info *sta = (struct sta_info *) ptr;
2335
2336 if (aplist && !sta->ap)
2337 continue;
2338 addr[count].sa_family = ARPHRD_ETHER;
2339 memcpy(addr[count].sa_data, sta->addr, ETH_ALEN);
2340 if (sta->last_rx_silence == 0)
2341 qual[count].qual = sta->last_rx_signal < 27 ?
2342 0 : (sta->last_rx_signal - 27) * 92 / 127;
2343 else
2344 qual[count].qual = sta->last_rx_signal -
2345 sta->last_rx_silence - 35;
2346 qual[count].level = HFA384X_LEVEL_TO_dBm(sta->last_rx_signal);
2347 qual[count].noise = HFA384X_LEVEL_TO_dBm(sta->last_rx_silence);
2348 qual[count].updated = sta->last_rx_updated;
2349
2350 sta->last_rx_updated = IW_QUAL_DBM;
2351
2352 count++;
2353 if (count >= buf_size)
2354 break;
2355 }
2356 spin_unlock_bh(&ap->sta_table_lock);
2357
2358 return count;
2359 }
2360
2361
2362 /* Translate our list of Access Points & Stations to a card independent
2363 * format that the Wireless Tools will understand - Jean II */
2364 int prism2_ap_translate_scan(struct net_device *dev,
2365 struct iw_request_info *info, char *buffer)
2366 {
2367 struct hostap_interface *iface;
2368 local_info_t *local;
2369 struct ap_data *ap;
2370 struct list_head *ptr;
2371 struct iw_event iwe;
2372 char *current_ev = buffer;
2373 char *end_buf = buffer + IW_SCAN_MAX_DATA;
2374 #if !defined(PRISM2_NO_KERNEL_IEEE80211_MGMT)
2375 char buf[64];
2376 #endif
2377
2378 iface = netdev_priv(dev);
2379 local = iface->local;
2380 ap = local->ap;
2381
2382 spin_lock_bh(&ap->sta_table_lock);
2383
2384 for (ptr = ap->sta_list.next; ptr != NULL && ptr != &ap->sta_list;
2385 ptr = ptr->next) {
2386 struct sta_info *sta = (struct sta_info *) ptr;
2387
2388 /* First entry *MUST* be the AP MAC address */
2389 memset(&iwe, 0, sizeof(iwe));
2390 iwe.cmd = SIOCGIWAP;
2391 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
2392 memcpy(iwe.u.ap_addr.sa_data, sta->addr, ETH_ALEN);
2393 iwe.len = IW_EV_ADDR_LEN;
2394 current_ev = iwe_stream_add_event(info, current_ev, end_buf,
2395 &iwe, IW_EV_ADDR_LEN);
2396
2397 /* Use the mode to indicate if it's a station or
2398 * an Access Point */
2399 memset(&iwe, 0, sizeof(iwe));
2400 iwe.cmd = SIOCGIWMODE;
2401 if (sta->ap)
2402 iwe.u.mode = IW_MODE_MASTER;
2403 else
2404 iwe.u.mode = IW_MODE_INFRA;
2405 iwe.len = IW_EV_UINT_LEN;
2406 current_ev = iwe_stream_add_event(info, current_ev, end_buf,
2407 &iwe, IW_EV_UINT_LEN);
2408
2409 /* Some quality */
2410 memset(&iwe, 0, sizeof(iwe));
2411 iwe.cmd = IWEVQUAL;
2412 if (sta->last_rx_silence == 0)
2413 iwe.u.qual.qual = sta->last_rx_signal < 27 ?
2414 0 : (sta->last_rx_signal - 27) * 92 / 127;
2415 else
2416 iwe.u.qual.qual = sta->last_rx_signal -
2417 sta->last_rx_silence - 35;
2418 iwe.u.qual.level = HFA384X_LEVEL_TO_dBm(sta->last_rx_signal);
2419 iwe.u.qual.noise = HFA384X_LEVEL_TO_dBm(sta->last_rx_silence);
2420 iwe.u.qual.updated = sta->last_rx_updated;
2421 iwe.len = IW_EV_QUAL_LEN;
2422 current_ev = iwe_stream_add_event(info, current_ev, end_buf,
2423 &iwe, IW_EV_QUAL_LEN);
2424
2425 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2426 if (sta->ap) {
2427 memset(&iwe, 0, sizeof(iwe));
2428 iwe.cmd = SIOCGIWESSID;
2429 iwe.u.data.length = sta->u.ap.ssid_len;
2430 iwe.u.data.flags = 1;
2431 current_ev = iwe_stream_add_point(info, current_ev,
2432 end_buf, &iwe,
2433 sta->u.ap.ssid);
2434
2435 memset(&iwe, 0, sizeof(iwe));
2436 iwe.cmd = SIOCGIWENCODE;
2437 if (sta->capability & WLAN_CAPABILITY_PRIVACY)
2438 iwe.u.data.flags =
2439 IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
2440 else
2441 iwe.u.data.flags = IW_ENCODE_DISABLED;
2442 current_ev = iwe_stream_add_point(info, current_ev,
2443 end_buf, &iwe,
2444 sta->u.ap.ssid);
2445
2446 if (sta->u.ap.channel > 0 &&
2447 sta->u.ap.channel <= FREQ_COUNT) {
2448 memset(&iwe, 0, sizeof(iwe));
2449 iwe.cmd = SIOCGIWFREQ;
2450 iwe.u.freq.m = freq_list[sta->u.ap.channel - 1]
2451 * 100000;
2452 iwe.u.freq.e = 1;
2453 current_ev = iwe_stream_add_event(
2454 info, current_ev, end_buf, &iwe,
2455 IW_EV_FREQ_LEN);
2456 }
2457
2458 memset(&iwe, 0, sizeof(iwe));
2459 iwe.cmd = IWEVCUSTOM;
2460 sprintf(buf, "beacon_interval=%d",
2461 sta->listen_interval);
2462 iwe.u.data.length = strlen(buf);
2463 current_ev = iwe_stream_add_point(info, current_ev,
2464 end_buf, &iwe, buf);
2465 }
2466 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2467
2468 sta->last_rx_updated = IW_QUAL_DBM;
2469
2470 /* To be continued, we should make good use of IWEVCUSTOM */
2471 }
2472
2473 spin_unlock_bh(&ap->sta_table_lock);
2474
2475 return current_ev - buffer;
2476 }
2477
2478
2479 static int prism2_hostapd_add_sta(struct ap_data *ap,
2480 struct prism2_hostapd_param *param)
2481 {
2482 struct sta_info *sta;
2483
2484 spin_lock_bh(&ap->sta_table_lock);
2485 sta = ap_get_sta(ap, param->sta_addr);
2486 if (sta)
2487 atomic_inc(&sta->users);
2488 spin_unlock_bh(&ap->sta_table_lock);
2489
2490 if (sta == NULL) {
2491 sta = ap_add_sta(ap, param->sta_addr);
2492 if (sta == NULL)
2493 return -1;
2494 }
2495
2496 if (!(sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
2497 hostap_event_new_sta(sta->local->dev, sta);
2498
2499 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC;
2500 sta->last_rx = jiffies;
2501 sta->aid = param->u.add_sta.aid;
2502 sta->capability = param->u.add_sta.capability;
2503 sta->tx_supp_rates = param->u.add_sta.tx_supp_rates;
2504 if (sta->tx_supp_rates & WLAN_RATE_1M)
2505 sta->supported_rates[0] = 2;
2506 if (sta->tx_supp_rates & WLAN_RATE_2M)
2507 sta->supported_rates[1] = 4;
2508 if (sta->tx_supp_rates & WLAN_RATE_5M5)
2509 sta->supported_rates[2] = 11;
2510 if (sta->tx_supp_rates & WLAN_RATE_11M)
2511 sta->supported_rates[3] = 22;
2512 prism2_check_tx_rates(sta);
2513 atomic_dec(&sta->users);
2514 return 0;
2515 }
2516
2517
2518 static int prism2_hostapd_remove_sta(struct ap_data *ap,
2519 struct prism2_hostapd_param *param)
2520 {
2521 struct sta_info *sta;
2522
2523 spin_lock_bh(&ap->sta_table_lock);
2524 sta = ap_get_sta(ap, param->sta_addr);
2525 if (sta) {
2526 ap_sta_hash_del(ap, sta);
2527 list_del(&sta->list);
2528 }
2529 spin_unlock_bh(&ap->sta_table_lock);
2530
2531 if (!sta)
2532 return -ENOENT;
2533
2534 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
2535 hostap_event_expired_sta(sta->local->dev, sta);
2536 ap_free_sta(ap, sta);
2537
2538 return 0;
2539 }
2540
2541
2542 static int prism2_hostapd_get_info_sta(struct ap_data *ap,
2543 struct prism2_hostapd_param *param)
2544 {
2545 struct sta_info *sta;
2546
2547 spin_lock_bh(&ap->sta_table_lock);
2548 sta = ap_get_sta(ap, param->sta_addr);
2549 if (sta)
2550 atomic_inc(&sta->users);
2551 spin_unlock_bh(&ap->sta_table_lock);
2552
2553 if (!sta)
2554 return -ENOENT;
2555
2556 param->u.get_info_sta.inactive_sec = (jiffies - sta->last_rx) / HZ;
2557
2558 atomic_dec(&sta->users);
2559
2560 return 1;
2561 }
2562
2563
2564 static int prism2_hostapd_set_flags_sta(struct ap_data *ap,
2565 struct prism2_hostapd_param *param)
2566 {
2567 struct sta_info *sta;
2568
2569 spin_lock_bh(&ap->sta_table_lock);
2570 sta = ap_get_sta(ap, param->sta_addr);
2571 if (sta) {
2572 sta->flags |= param->u.set_flags_sta.flags_or;
2573 sta->flags &= param->u.set_flags_sta.flags_and;
2574 }
2575 spin_unlock_bh(&ap->sta_table_lock);
2576
2577 if (!sta)
2578 return -ENOENT;
2579
2580 return 0;
2581 }
2582
2583
2584 static int prism2_hostapd_sta_clear_stats(struct ap_data *ap,
2585 struct prism2_hostapd_param *param)
2586 {
2587 struct sta_info *sta;
2588 int rate;
2589
2590 spin_lock_bh(&ap->sta_table_lock);
2591 sta = ap_get_sta(ap, param->sta_addr);
2592 if (sta) {
2593 sta->rx_packets = sta->tx_packets = 0;
2594 sta->rx_bytes = sta->tx_bytes = 0;
2595 for (rate = 0; rate < WLAN_RATE_COUNT; rate++) {
2596 sta->tx_count[rate] = 0;
2597 sta->rx_count[rate] = 0;
2598 }
2599 }
2600 spin_unlock_bh(&ap->sta_table_lock);
2601
2602 if (!sta)
2603 return -ENOENT;
2604
2605 return 0;
2606 }
2607
2608
2609 int prism2_hostapd(struct ap_data *ap, struct prism2_hostapd_param *param)
2610 {
2611 switch (param->cmd) {
2612 case PRISM2_HOSTAPD_FLUSH:
2613 ap_control_kickall(ap);
2614 return 0;
2615 case PRISM2_HOSTAPD_ADD_STA:
2616 return prism2_hostapd_add_sta(ap, param);
2617 case PRISM2_HOSTAPD_REMOVE_STA:
2618 return prism2_hostapd_remove_sta(ap, param);
2619 case PRISM2_HOSTAPD_GET_INFO_STA:
2620 return prism2_hostapd_get_info_sta(ap, param);
2621 case PRISM2_HOSTAPD_SET_FLAGS_STA:
2622 return prism2_hostapd_set_flags_sta(ap, param);
2623 case PRISM2_HOSTAPD_STA_CLEAR_STATS:
2624 return prism2_hostapd_sta_clear_stats(ap, param);
2625 default:
2626 printk(KERN_WARNING "prism2_hostapd: unknown cmd=%d\n",
2627 param->cmd);
2628 return -EOPNOTSUPP;
2629 }
2630 }
2631
2632
2633 /* Update station info for host-based TX rate control and return current
2634 * TX rate */
2635 static int ap_update_sta_tx_rate(struct sta_info *sta, struct net_device *dev)
2636 {
2637 int ret = sta->tx_rate;
2638 struct hostap_interface *iface;
2639 local_info_t *local;
2640
2641 iface = netdev_priv(dev);
2642 local = iface->local;
2643
2644 sta->tx_count[sta->tx_rate_idx]++;
2645 sta->tx_since_last_failure++;
2646 sta->tx_consecutive_exc = 0;
2647 if (sta->tx_since_last_failure >= WLAN_RATE_UPDATE_COUNT &&
2648 sta->tx_rate_idx < sta->tx_max_rate) {
2649 /* use next higher rate */
2650 int old_rate, new_rate;
2651 old_rate = new_rate = sta->tx_rate_idx;
2652 while (new_rate < sta->tx_max_rate) {
2653 new_rate++;
2654 if (ap_tx_rate_ok(new_rate, sta, local)) {
2655 sta->tx_rate_idx = new_rate;
2656 break;
2657 }
2658 }
2659 if (old_rate != sta->tx_rate_idx) {
2660 switch (sta->tx_rate_idx) {
2661 case 0: sta->tx_rate = 10; break;
2662 case 1: sta->tx_rate = 20; break;
2663 case 2: sta->tx_rate = 55; break;
2664 case 3: sta->tx_rate = 110; break;
2665 default: sta->tx_rate = 0; break;
2666 }
2667 PDEBUG(DEBUG_AP, "%s: STA %pM TX rate raised to %d\n",
2668 dev->name, sta->addr, sta->tx_rate);
2669 }
2670 sta->tx_since_last_failure = 0;
2671 }
2672
2673 return ret;
2674 }
2675
2676
2677 /* Called only from software IRQ. Called for each TX frame prior possible
2678 * encryption and transmit. */
2679 ap_tx_ret hostap_handle_sta_tx(local_info_t *local, struct hostap_tx_data *tx)
2680 {
2681 struct sta_info *sta = NULL;
2682 struct sk_buff *skb = tx->skb;
2683 int set_tim, ret;
2684 struct ieee80211_hdr *hdr;
2685 struct hostap_skb_tx_data *meta;
2686
2687 meta = (struct hostap_skb_tx_data *) skb->cb;
2688 ret = AP_TX_CONTINUE;
2689 if (local->ap == NULL || skb->len < 10 ||
2690 meta->iface->type == HOSTAP_INTERFACE_STA)
2691 goto out;
2692
2693 hdr = (struct ieee80211_hdr *) skb->data;
2694
2695 if (hdr->addr1[0] & 0x01) {
2696 /* broadcast/multicast frame - no AP related processing */
2697 if (local->ap->num_sta <= 0)
2698 ret = AP_TX_DROP;
2699 goto out;
2700 }
2701
2702 /* unicast packet - check whether destination STA is associated */
2703 spin_lock(&local->ap->sta_table_lock);
2704 sta = ap_get_sta(local->ap, hdr->addr1);
2705 if (sta)
2706 atomic_inc(&sta->users);
2707 spin_unlock(&local->ap->sta_table_lock);
2708
2709 if (local->iw_mode == IW_MODE_MASTER && sta == NULL &&
2710 !(meta->flags & HOSTAP_TX_FLAGS_WDS) &&
2711 meta->iface->type != HOSTAP_INTERFACE_MASTER &&
2712 meta->iface->type != HOSTAP_INTERFACE_AP) {
2713 #if 0
2714 /* This can happen, e.g., when wlan0 is added to a bridge and
2715 * bridging code does not know which port is the correct target
2716 * for a unicast frame. In this case, the packet is send to all
2717 * ports of the bridge. Since this is a valid scenario, do not
2718 * print out any errors here. */
2719 if (net_ratelimit()) {
2720 printk(KERN_DEBUG "AP: drop packet to non-associated "
2721 "STA %pM\n", hdr->addr1);
2722 }
2723 #endif
2724 local->ap->tx_drop_nonassoc++;
2725 ret = AP_TX_DROP;
2726 goto out;
2727 }
2728
2729 if (sta == NULL)
2730 goto out;
2731
2732 if (!(sta->flags & WLAN_STA_AUTHORIZED))
2733 ret = AP_TX_CONTINUE_NOT_AUTHORIZED;
2734
2735 /* Set tx_rate if using host-based TX rate control */
2736 if (!local->fw_tx_rate_control)
2737 local->ap->last_tx_rate = meta->rate =
2738 ap_update_sta_tx_rate(sta, local->dev);
2739
2740 if (local->iw_mode != IW_MODE_MASTER)
2741 goto out;
2742
2743 if (!(sta->flags & WLAN_STA_PS))
2744 goto out;
2745
2746 if (meta->flags & HOSTAP_TX_FLAGS_ADD_MOREDATA) {
2747 /* indicate to STA that more frames follow */
2748 hdr->frame_control |=
2749 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
2750 }
2751
2752 if (meta->flags & HOSTAP_TX_FLAGS_BUFFERED_FRAME) {
2753 /* packet was already buffered and now send due to
2754 * PS poll, so do not rebuffer it */
2755 goto out;
2756 }
2757
2758 if (skb_queue_len(&sta->tx_buf) >= STA_MAX_TX_BUFFER) {
2759 PDEBUG(DEBUG_PS, "%s: No more space in STA (%pM)'s"
2760 "PS mode buffer\n",
2761 local->dev->name, sta->addr);
2762 /* Make sure that TIM is set for the station (it might not be
2763 * after AP wlan hw reset). */
2764 /* FIX: should fix hw reset to restore bits based on STA
2765 * buffer state.. */
2766 hostap_set_tim(local, sta->aid, 1);
2767 sta->flags |= WLAN_STA_TIM;
2768 ret = AP_TX_DROP;
2769 goto out;
2770 }
2771
2772 /* STA in PS mode, buffer frame for later delivery */
2773 set_tim = skb_queue_empty(&sta->tx_buf);
2774 skb_queue_tail(&sta->tx_buf, skb);
2775 /* FIX: could save RX time to skb and expire buffered frames after
2776 * some time if STA does not poll for them */
2777
2778 if (set_tim) {
2779 if (sta->flags & WLAN_STA_TIM)
2780 PDEBUG(DEBUG_PS2, "Re-setting TIM for aid %d\n",
2781 sta->aid);
2782 hostap_set_tim(local, sta->aid, 1);
2783 sta->flags |= WLAN_STA_TIM;
2784 }
2785
2786 ret = AP_TX_BUFFERED;
2787
2788 out:
2789 if (sta != NULL) {
2790 if (ret == AP_TX_CONTINUE ||
2791 ret == AP_TX_CONTINUE_NOT_AUTHORIZED) {
2792 sta->tx_packets++;
2793 sta->tx_bytes += skb->len;
2794 sta->last_tx = jiffies;
2795 }
2796
2797 if ((ret == AP_TX_CONTINUE ||
2798 ret == AP_TX_CONTINUE_NOT_AUTHORIZED) &&
2799 sta->crypt && tx->host_encrypt) {
2800 tx->crypt = sta->crypt;
2801 tx->sta_ptr = sta; /* hostap_handle_sta_release() will
2802 * be called to release sta info
2803 * later */
2804 } else
2805 atomic_dec(&sta->users);
2806 }
2807
2808 return ret;
2809 }
2810
2811
2812 void hostap_handle_sta_release(void *ptr)
2813 {
2814 struct sta_info *sta = ptr;
2815 atomic_dec(&sta->users);
2816 }
2817
2818
2819 /* Called only as a tasklet (software IRQ) */
2820 void hostap_handle_sta_tx_exc(local_info_t *local, struct sk_buff *skb)
2821 {
2822 struct sta_info *sta;
2823 struct ieee80211_hdr *hdr;
2824 struct hostap_skb_tx_data *meta;
2825
2826 hdr = (struct ieee80211_hdr *) skb->data;
2827 meta = (struct hostap_skb_tx_data *) skb->cb;
2828
2829 spin_lock(&local->ap->sta_table_lock);
2830 sta = ap_get_sta(local->ap, hdr->addr1);
2831 if (!sta) {
2832 spin_unlock(&local->ap->sta_table_lock);
2833 PDEBUG(DEBUG_AP, "%s: Could not find STA %pM"
2834 " for this TX error (@%lu)\n",
2835 local->dev->name, hdr->addr1, jiffies);
2836 return;
2837 }
2838
2839 sta->tx_since_last_failure = 0;
2840 sta->tx_consecutive_exc++;
2841
2842 if (sta->tx_consecutive_exc >= WLAN_RATE_DECREASE_THRESHOLD &&
2843 sta->tx_rate_idx > 0 && meta->rate <= sta->tx_rate) {
2844 /* use next lower rate */
2845 int old, rate;
2846 old = rate = sta->tx_rate_idx;
2847 while (rate > 0) {
2848 rate--;
2849 if (ap_tx_rate_ok(rate, sta, local)) {
2850 sta->tx_rate_idx = rate;
2851 break;
2852 }
2853 }
2854 if (old != sta->tx_rate_idx) {
2855 switch (sta->tx_rate_idx) {
2856 case 0: sta->tx_rate = 10; break;
2857 case 1: sta->tx_rate = 20; break;
2858 case 2: sta->tx_rate = 55; break;
2859 case 3: sta->tx_rate = 110; break;
2860 default: sta->tx_rate = 0; break;
2861 }
2862 PDEBUG(DEBUG_AP,
2863 "%s: STA %pM TX rate lowered to %d\n",
2864 local->dev->name, sta->addr, sta->tx_rate);
2865 }
2866 sta->tx_consecutive_exc = 0;
2867 }
2868 spin_unlock(&local->ap->sta_table_lock);
2869 }
2870
2871
2872 static void hostap_update_sta_ps2(local_info_t *local, struct sta_info *sta,
2873 int pwrmgt, int type, int stype)
2874 {
2875 if (pwrmgt && !(sta->flags & WLAN_STA_PS)) {
2876 sta->flags |= WLAN_STA_PS;
2877 PDEBUG(DEBUG_PS2, "STA %pM changed to use PS "
2878 "mode (type=0x%02X, stype=0x%02X)\n",
2879 sta->addr, type >> 2, stype >> 4);
2880 } else if (!pwrmgt && (sta->flags & WLAN_STA_PS)) {
2881 sta->flags &= ~WLAN_STA_PS;
2882 PDEBUG(DEBUG_PS2, "STA %pM changed to not use "
2883 "PS mode (type=0x%02X, stype=0x%02X)\n",
2884 sta->addr, type >> 2, stype >> 4);
2885 if (type != IEEE80211_FTYPE_CTL ||
2886 stype != IEEE80211_STYPE_PSPOLL)
2887 schedule_packet_send(local, sta);
2888 }
2889 }
2890
2891
2892 /* Called only as a tasklet (software IRQ). Called for each RX frame to update
2893 * STA power saving state. pwrmgt is a flag from 802.11 frame_control field. */
2894 int hostap_update_sta_ps(local_info_t *local, struct ieee80211_hdr *hdr)
2895 {
2896 struct sta_info *sta;
2897 u16 fc;
2898
2899 spin_lock(&local->ap->sta_table_lock);
2900 sta = ap_get_sta(local->ap, hdr->addr2);
2901 if (sta)
2902 atomic_inc(&sta->users);
2903 spin_unlock(&local->ap->sta_table_lock);
2904
2905 if (!sta)
2906 return -1;
2907
2908 fc = le16_to_cpu(hdr->frame_control);
2909 hostap_update_sta_ps2(local, sta, fc & IEEE80211_FCTL_PM,
2910 fc & IEEE80211_FCTL_FTYPE,
2911 fc & IEEE80211_FCTL_STYPE);
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 *hdr;
2929
2930 if (local->ap == NULL)
2931 return AP_RX_CONTINUE;
2932
2933 hdr = (struct ieee80211_hdr *) skb->data;
2934
2935 fc = le16_to_cpu(hdr->frame_control);
2936 type = fc & IEEE80211_FCTL_FTYPE;
2937 stype = fc & IEEE80211_FCTL_STYPE;
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 %pM"
2960 " (type=0x%02x, subtype=0x%02x)\n",
2961 dev->name, 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 frame"
2995 " without ToDS from not associated STA %pM\n",
2996 dev->name, hdr->addr2);
2997 hostap_rx(dev, skb, rx_stats);
2998 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2999 }
3000 ret = AP_RX_EXIT;
3001 goto out;
3002 } else if (stype == IEEE80211_STYPE_NULLFUNC) {
3003 /* At least Lucent cards seem to send periodic nullfunc
3004 * frames with ToDS. Let these through to update SQ
3005 * stats and PS state. Nullfunc frames do not contain
3006 * any data and they will be dropped below. */
3007 } else {
3008 /* If BSSID (Addr3) is foreign, this frame is a normal
3009 * broadcast frame from an IBSS network. Drop it silently.
3010 * If BSSID is own, report the dropping of this frame. */
3011 if (memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
3012 printk(KERN_DEBUG "%s: dropped received packet from %pM"
3013 " with no ToDS flag "
3014 "(type=0x%02x, subtype=0x%02x)\n", dev->name,
3015 hdr->addr2, type >> 2, stype >> 4);
3016 hostap_dump_rx_80211(dev->name, skb, rx_stats);
3017 }
3018 ret = AP_RX_DROP;
3019 goto out;
3020 }
3021
3022 if (sta) {
3023 hostap_update_sta_ps2(local, sta, fc & IEEE80211_FCTL_PM,
3024 type, stype);
3025
3026 sta->rx_packets++;
3027 sta->rx_bytes += skb->len;
3028 sta->last_rx = jiffies;
3029 }
3030
3031 if (local->ap->nullfunc_ack && stype == IEEE80211_STYPE_NULLFUNC &&
3032 fc & IEEE80211_FCTL_TODS) {
3033 if (local->hostapd) {
3034 prism2_rx_80211(local->apdev, skb, rx_stats,
3035 PRISM2_RX_NULLFUNC_ACK);
3036 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
3037 } else {
3038 /* some STA f/w's seem to require control::ACK frame
3039 * for data::nullfunc, but Prism2 f/w 0.8.0 (at least
3040 * from Compaq) does not send this.. Try to generate
3041 * ACK for these frames from the host driver to make
3042 * power saving work with, e.g., Lucent WaveLAN f/w */
3043 hostap_rx(dev, skb, rx_stats);
3044 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
3045 }
3046 ret = AP_RX_EXIT;
3047 goto out;
3048 }
3049
3050 out:
3051 if (sta)
3052 atomic_dec(&sta->users);
3053
3054 return ret;
3055 }
3056
3057
3058 /* Called only as a tasklet (software IRQ) */
3059 int hostap_handle_sta_crypto(local_info_t *local,
3060 struct ieee80211_hdr *hdr,
3061 struct lib80211_crypt_data **crypt,
3062 void **sta_ptr)
3063 {
3064 struct sta_info *sta;
3065
3066 spin_lock(&local->ap->sta_table_lock);
3067 sta = ap_get_sta(local->ap, hdr->addr2);
3068 if (sta)
3069 atomic_inc(&sta->users);
3070 spin_unlock(&local->ap->sta_table_lock);
3071
3072 if (!sta)
3073 return -1;
3074
3075 if (sta->crypt) {
3076 *crypt = sta->crypt;
3077 *sta_ptr = sta;
3078 /* hostap_handle_sta_release() will be called to release STA
3079 * info */
3080 } else
3081 atomic_dec(&sta->users);
3082
3083 return 0;
3084 }
3085
3086
3087 /* Called only as a tasklet (software IRQ) */
3088 int hostap_is_sta_assoc(struct ap_data *ap, u8 *sta_addr)
3089 {
3090 struct sta_info *sta;
3091 int ret = 0;
3092
3093 spin_lock(&ap->sta_table_lock);
3094 sta = ap_get_sta(ap, sta_addr);
3095 if (sta != NULL && (sta->flags & WLAN_STA_ASSOC) && !sta->ap)
3096 ret = 1;
3097 spin_unlock(&ap->sta_table_lock);
3098
3099 return ret;
3100 }
3101
3102
3103 /* Called only as a tasklet (software IRQ) */
3104 int hostap_is_sta_authorized(struct ap_data *ap, u8 *sta_addr)
3105 {
3106 struct sta_info *sta;
3107 int ret = 0;
3108
3109 spin_lock(&ap->sta_table_lock);
3110 sta = ap_get_sta(ap, sta_addr);
3111 if (sta != NULL && (sta->flags & WLAN_STA_ASSOC) && !sta->ap &&
3112 ((sta->flags & WLAN_STA_AUTHORIZED) ||
3113 ap->local->ieee_802_1x == 0))
3114 ret = 1;
3115 spin_unlock(&ap->sta_table_lock);
3116
3117 return ret;
3118 }
3119
3120
3121 /* Called only as a tasklet (software IRQ) */
3122 int hostap_add_sta(struct ap_data *ap, u8 *sta_addr)
3123 {
3124 struct sta_info *sta;
3125 int ret = 1;
3126
3127 if (!ap)
3128 return -1;
3129
3130 spin_lock(&ap->sta_table_lock);
3131 sta = ap_get_sta(ap, sta_addr);
3132 if (sta)
3133 ret = 0;
3134 spin_unlock(&ap->sta_table_lock);
3135
3136 if (ret == 1) {
3137 sta = ap_add_sta(ap, sta_addr);
3138 if (!sta)
3139 return -1;
3140 sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
3141 sta->ap = 1;
3142 memset(sta->supported_rates, 0, sizeof(sta->supported_rates));
3143 /* No way of knowing which rates are supported since we did not
3144 * get supported rates element from beacon/assoc req. Assume
3145 * that remote end supports all 802.11b rates. */
3146 sta->supported_rates[0] = 0x82;
3147 sta->supported_rates[1] = 0x84;
3148 sta->supported_rates[2] = 0x0b;
3149 sta->supported_rates[3] = 0x16;
3150 sta->tx_supp_rates = WLAN_RATE_1M | WLAN_RATE_2M |
3151 WLAN_RATE_5M5 | WLAN_RATE_11M;
3152 sta->tx_rate = 110;
3153 sta->tx_max_rate = sta->tx_rate_idx = 3;
3154 }
3155
3156 return ret;
3157 }
3158
3159
3160 /* Called only as a tasklet (software IRQ) */
3161 int hostap_update_rx_stats(struct ap_data *ap,
3162 struct ieee80211_hdr *hdr,
3163 struct hostap_80211_rx_status *rx_stats)
3164 {
3165 struct sta_info *sta;
3166
3167 if (!ap)
3168 return -1;
3169
3170 spin_lock(&ap->sta_table_lock);
3171 sta = ap_get_sta(ap, hdr->addr2);
3172 if (sta) {
3173 sta->last_rx_silence = rx_stats->noise;
3174 sta->last_rx_signal = rx_stats->signal;
3175 sta->last_rx_rate = rx_stats->rate;
3176 sta->last_rx_updated = IW_QUAL_ALL_UPDATED | IW_QUAL_DBM;
3177 if (rx_stats->rate == 10)
3178 sta->rx_count[0]++;
3179 else if (rx_stats->rate == 20)
3180 sta->rx_count[1]++;
3181 else if (rx_stats->rate == 55)
3182 sta->rx_count[2]++;
3183 else if (rx_stats->rate == 110)
3184 sta->rx_count[3]++;
3185 }
3186 spin_unlock(&ap->sta_table_lock);
3187
3188 return sta ? 0 : -1;
3189 }
3190
3191
3192 void hostap_update_rates(local_info_t *local)
3193 {
3194 struct sta_info *sta;
3195 struct ap_data *ap = local->ap;
3196
3197 if (!ap)
3198 return;
3199
3200 spin_lock_bh(&ap->sta_table_lock);
3201 list_for_each_entry(sta, &ap->sta_list, list) {
3202 prism2_check_tx_rates(sta);
3203 }
3204 spin_unlock_bh(&ap->sta_table_lock);
3205 }
3206
3207
3208 void * ap_crypt_get_ptrs(struct ap_data *ap, u8 *addr, int permanent,
3209 struct lib80211_crypt_data ***crypt)
3210 {
3211 struct sta_info *sta;
3212
3213 spin_lock_bh(&ap->sta_table_lock);
3214 sta = ap_get_sta(ap, addr);
3215 if (sta)
3216 atomic_inc(&sta->users);
3217 spin_unlock_bh(&ap->sta_table_lock);
3218
3219 if (!sta && permanent)
3220 sta = ap_add_sta(ap, addr);
3221
3222 if (!sta)
3223 return NULL;
3224
3225 if (permanent)
3226 sta->flags |= WLAN_STA_PERM;
3227
3228 *crypt = &sta->crypt;
3229
3230 return sta;
3231 }
3232
3233
3234 void hostap_add_wds_links(local_info_t *local)
3235 {
3236 struct ap_data *ap = local->ap;
3237 struct sta_info *sta;
3238
3239 spin_lock_bh(&ap->sta_table_lock);
3240 list_for_each_entry(sta, &ap->sta_list, list) {
3241 if (sta->ap)
3242 hostap_wds_link_oper(local, sta->addr, WDS_ADD);
3243 }
3244 spin_unlock_bh(&ap->sta_table_lock);
3245
3246 schedule_work(&local->ap->wds_oper_queue);
3247 }
3248
3249
3250 void hostap_wds_link_oper(local_info_t *local, u8 *addr, wds_oper_type type)
3251 {
3252 struct wds_oper_data *entry;
3253
3254 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
3255 if (!entry)
3256 return;
3257 memcpy(entry->addr, addr, ETH_ALEN);
3258 entry->type = type;
3259 spin_lock_bh(&local->lock);
3260 entry->next = local->ap->wds_oper_entries;
3261 local->ap->wds_oper_entries = entry;
3262 spin_unlock_bh(&local->lock);
3263
3264 schedule_work(&local->ap->wds_oper_queue);
3265 }
3266
3267
3268 EXPORT_SYMBOL(hostap_init_data);
3269 EXPORT_SYMBOL(hostap_init_ap_proc);
3270 EXPORT_SYMBOL(hostap_free_data);
3271 EXPORT_SYMBOL(hostap_check_sta_fw_version);
3272 EXPORT_SYMBOL(hostap_handle_sta_tx_exc);
3273 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
3274 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
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