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Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
[GitHub/LineageOS/android_kernel_samsung_universal7580.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 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
862 if (ap->crypt)
863 ap->crypt->deinit(ap->crypt_priv);
864 ap->crypt = ap->crypt_priv = NULL;
865 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
866
867 list_for_each_entry_safe(sta, n, &ap->sta_list, list) {
868 ap_sta_hash_del(ap, sta);
869 list_del(&sta->list);
870 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
871 hostap_event_expired_sta(sta->local->dev, sta);
872 ap_free_sta(ap, sta);
873 }
874
875 #ifndef PRISM2_NO_PROCFS_DEBUG
876 if (ap->proc != NULL) {
877 remove_proc_entry("ap_debug", ap->proc);
878 }
879 #endif /* PRISM2_NO_PROCFS_DEBUG */
880
881 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
882 if (ap->proc != NULL) {
883 remove_proc_entry("ap", ap->proc);
884 remove_proc_entry("ap_control", ap->proc);
885 }
886 ap_control_flush_macs(&ap->mac_restrictions);
887 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
888
889 ap->initialized = 0;
890 }
891
892
893 /* caller should have mutex for AP STA list handling */
894 static struct sta_info* ap_get_sta(struct ap_data *ap, u8 *sta)
895 {
896 struct sta_info *s;
897
898 s = ap->sta_hash[STA_HASH(sta)];
899 while (s != NULL && memcmp(s->addr, sta, ETH_ALEN) != 0)
900 s = s->hnext;
901 return s;
902 }
903
904
905 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
906
907 /* Called from timer handler and from scheduled AP queue handlers */
908 static void prism2_send_mgmt(struct net_device *dev,
909 u16 type_subtype, char *body,
910 int body_len, u8 *addr, u16 tx_cb_idx)
911 {
912 struct hostap_interface *iface;
913 local_info_t *local;
914 struct ieee80211_hdr *hdr;
915 u16 fc;
916 struct sk_buff *skb;
917 struct hostap_skb_tx_data *meta;
918 int hdrlen;
919
920 iface = netdev_priv(dev);
921 local = iface->local;
922 dev = local->dev; /* always use master radio device */
923 iface = netdev_priv(dev);
924
925 if (!(dev->flags & IFF_UP)) {
926 PDEBUG(DEBUG_AP, "%s: prism2_send_mgmt - device is not UP - "
927 "cannot send frame\n", dev->name);
928 return;
929 }
930
931 skb = dev_alloc_skb(sizeof(*hdr) + body_len);
932 if (skb == NULL) {
933 PDEBUG(DEBUG_AP, "%s: prism2_send_mgmt failed to allocate "
934 "skb\n", dev->name);
935 return;
936 }
937
938 fc = type_subtype;
939 hdrlen = hostap_80211_get_hdrlen(cpu_to_le16(type_subtype));
940 hdr = (struct ieee80211_hdr *) skb_put(skb, hdrlen);
941 if (body)
942 memcpy(skb_put(skb, body_len), body, body_len);
943
944 memset(hdr, 0, hdrlen);
945
946 /* FIX: ctrl::ack sending used special HFA384X_TX_CTRL_802_11
947 * tx_control instead of using local->tx_control */
948
949
950 memcpy(hdr->addr1, addr, ETH_ALEN); /* DA / RA */
951 if (ieee80211_is_data(hdr->frame_control)) {
952 fc |= IEEE80211_FCTL_FROMDS;
953 memcpy(hdr->addr2, dev->dev_addr, ETH_ALEN); /* BSSID */
954 memcpy(hdr->addr3, dev->dev_addr, ETH_ALEN); /* SA */
955 } else if (ieee80211_is_ctl(hdr->frame_control)) {
956 /* control:ACK does not have addr2 or addr3 */
957 memset(hdr->addr2, 0, ETH_ALEN);
958 memset(hdr->addr3, 0, ETH_ALEN);
959 } else {
960 memcpy(hdr->addr2, dev->dev_addr, ETH_ALEN); /* SA */
961 memcpy(hdr->addr3, dev->dev_addr, ETH_ALEN); /* BSSID */
962 }
963
964 hdr->frame_control = cpu_to_le16(fc);
965
966 meta = (struct hostap_skb_tx_data *) skb->cb;
967 memset(meta, 0, sizeof(*meta));
968 meta->magic = HOSTAP_SKB_TX_DATA_MAGIC;
969 meta->iface = iface;
970 meta->tx_cb_idx = tx_cb_idx;
971
972 skb->dev = dev;
973 skb_reset_mac_header(skb);
974 skb_reset_network_header(skb);
975 dev_queue_xmit(skb);
976 }
977 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
978
979
980 static int prism2_sta_proc_read(char *page, char **start, off_t off,
981 int count, int *eof, void *data)
982 {
983 char *p = page;
984 struct sta_info *sta = (struct sta_info *) data;
985 int i;
986
987 /* FIX: possible race condition.. the STA data could have just expired,
988 * but proc entry was still here so that the read could have started;
989 * some locking should be done here.. */
990
991 if (off != 0) {
992 *eof = 1;
993 return 0;
994 }
995
996 p += sprintf(p, "%s=%pM\nusers=%d\naid=%d\n"
997 "flags=0x%04x%s%s%s%s%s%s%s\n"
998 "capability=0x%02x\nlisten_interval=%d\nsupported_rates=",
999 sta->ap ? "AP" : "STA",
1000 sta->addr, atomic_read(&sta->users), sta->aid,
1001 sta->flags,
1002 sta->flags & WLAN_STA_AUTH ? " AUTH" : "",
1003 sta->flags & WLAN_STA_ASSOC ? " ASSOC" : "",
1004 sta->flags & WLAN_STA_PS ? " PS" : "",
1005 sta->flags & WLAN_STA_TIM ? " TIM" : "",
1006 sta->flags & WLAN_STA_PERM ? " PERM" : "",
1007 sta->flags & WLAN_STA_AUTHORIZED ? " AUTHORIZED" : "",
1008 sta->flags & WLAN_STA_PENDING_POLL ? " POLL" : "",
1009 sta->capability, sta->listen_interval);
1010 /* supported_rates: 500 kbit/s units with msb ignored */
1011 for (i = 0; i < sizeof(sta->supported_rates); i++)
1012 if (sta->supported_rates[i] != 0)
1013 p += sprintf(p, "%d%sMbps ",
1014 (sta->supported_rates[i] & 0x7f) / 2,
1015 sta->supported_rates[i] & 1 ? ".5" : "");
1016 p += sprintf(p, "\njiffies=%lu\nlast_auth=%lu\nlast_assoc=%lu\n"
1017 "last_rx=%lu\nlast_tx=%lu\nrx_packets=%lu\n"
1018 "tx_packets=%lu\n"
1019 "rx_bytes=%lu\ntx_bytes=%lu\nbuffer_count=%d\n"
1020 "last_rx: silence=%d dBm signal=%d dBm rate=%d%s Mbps\n"
1021 "tx_rate=%d\ntx[1M]=%d\ntx[2M]=%d\ntx[5.5M]=%d\n"
1022 "tx[11M]=%d\n"
1023 "rx[1M]=%d\nrx[2M]=%d\nrx[5.5M]=%d\nrx[11M]=%d\n",
1024 jiffies, sta->last_auth, sta->last_assoc, sta->last_rx,
1025 sta->last_tx,
1026 sta->rx_packets, sta->tx_packets, sta->rx_bytes,
1027 sta->tx_bytes, skb_queue_len(&sta->tx_buf),
1028 sta->last_rx_silence,
1029 sta->last_rx_signal, sta->last_rx_rate / 10,
1030 sta->last_rx_rate % 10 ? ".5" : "",
1031 sta->tx_rate, sta->tx_count[0], sta->tx_count[1],
1032 sta->tx_count[2], sta->tx_count[3], sta->rx_count[0],
1033 sta->rx_count[1], sta->rx_count[2], sta->rx_count[3]);
1034 if (sta->crypt && sta->crypt->ops && sta->crypt->ops->print_stats)
1035 p = sta->crypt->ops->print_stats(p, sta->crypt->priv);
1036 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1037 if (sta->ap) {
1038 if (sta->u.ap.channel >= 0)
1039 p += sprintf(p, "channel=%d\n", sta->u.ap.channel);
1040 p += sprintf(p, "ssid=");
1041 for (i = 0; i < sta->u.ap.ssid_len; i++)
1042 p += sprintf(p, ((sta->u.ap.ssid[i] >= 32 &&
1043 sta->u.ap.ssid[i] < 127) ?
1044 "%c" : "<%02x>"),
1045 sta->u.ap.ssid[i]);
1046 p += sprintf(p, "\n");
1047 }
1048 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1049
1050 return (p - page);
1051 }
1052
1053
1054 static void handle_add_proc_queue(struct work_struct *work)
1055 {
1056 struct ap_data *ap = container_of(work, struct ap_data,
1057 add_sta_proc_queue);
1058 struct sta_info *sta;
1059 char name[20];
1060 struct add_sta_proc_data *entry, *prev;
1061
1062 entry = ap->add_sta_proc_entries;
1063 ap->add_sta_proc_entries = NULL;
1064
1065 while (entry) {
1066 spin_lock_bh(&ap->sta_table_lock);
1067 sta = ap_get_sta(ap, entry->addr);
1068 if (sta)
1069 atomic_inc(&sta->users);
1070 spin_unlock_bh(&ap->sta_table_lock);
1071
1072 if (sta) {
1073 sprintf(name, "%pM", sta->addr);
1074 sta->proc = create_proc_read_entry(
1075 name, 0, ap->proc,
1076 prism2_sta_proc_read, sta);
1077
1078 atomic_dec(&sta->users);
1079 }
1080
1081 prev = entry;
1082 entry = entry->next;
1083 kfree(prev);
1084 }
1085 }
1086
1087
1088 static struct sta_info * ap_add_sta(struct ap_data *ap, u8 *addr)
1089 {
1090 struct sta_info *sta;
1091
1092 sta = kzalloc(sizeof(struct sta_info), GFP_ATOMIC);
1093 if (sta == NULL) {
1094 PDEBUG(DEBUG_AP, "AP: kmalloc failed\n");
1095 return NULL;
1096 }
1097
1098 /* initialize STA info data */
1099 sta->local = ap->local;
1100 skb_queue_head_init(&sta->tx_buf);
1101 memcpy(sta->addr, addr, ETH_ALEN);
1102
1103 atomic_inc(&sta->users);
1104 spin_lock_bh(&ap->sta_table_lock);
1105 list_add(&sta->list, &ap->sta_list);
1106 ap->num_sta++;
1107 ap_sta_hash_add(ap, sta);
1108 spin_unlock_bh(&ap->sta_table_lock);
1109
1110 if (ap->proc) {
1111 struct add_sta_proc_data *entry;
1112 /* schedule a non-interrupt context process to add a procfs
1113 * entry for the STA since procfs code use GFP_KERNEL */
1114 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
1115 if (entry) {
1116 memcpy(entry->addr, sta->addr, ETH_ALEN);
1117 entry->next = ap->add_sta_proc_entries;
1118 ap->add_sta_proc_entries = entry;
1119 schedule_work(&ap->add_sta_proc_queue);
1120 } else
1121 printk(KERN_DEBUG "Failed to add STA proc data\n");
1122 }
1123
1124 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1125 init_timer(&sta->timer);
1126 sta->timer.expires = jiffies + ap->max_inactivity;
1127 sta->timer.data = (unsigned long) sta;
1128 sta->timer.function = ap_handle_timer;
1129 if (!ap->local->hostapd)
1130 add_timer(&sta->timer);
1131 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1132
1133 return sta;
1134 }
1135
1136
1137 static int ap_tx_rate_ok(int rateidx, struct sta_info *sta,
1138 local_info_t *local)
1139 {
1140 if (rateidx > sta->tx_max_rate ||
1141 !(sta->tx_supp_rates & (1 << rateidx)))
1142 return 0;
1143
1144 if (local->tx_rate_control != 0 &&
1145 !(local->tx_rate_control & (1 << rateidx)))
1146 return 0;
1147
1148 return 1;
1149 }
1150
1151
1152 static void prism2_check_tx_rates(struct sta_info *sta)
1153 {
1154 int i;
1155
1156 sta->tx_supp_rates = 0;
1157 for (i = 0; i < sizeof(sta->supported_rates); i++) {
1158 if ((sta->supported_rates[i] & 0x7f) == 2)
1159 sta->tx_supp_rates |= WLAN_RATE_1M;
1160 if ((sta->supported_rates[i] & 0x7f) == 4)
1161 sta->tx_supp_rates |= WLAN_RATE_2M;
1162 if ((sta->supported_rates[i] & 0x7f) == 11)
1163 sta->tx_supp_rates |= WLAN_RATE_5M5;
1164 if ((sta->supported_rates[i] & 0x7f) == 22)
1165 sta->tx_supp_rates |= WLAN_RATE_11M;
1166 }
1167 sta->tx_max_rate = sta->tx_rate = sta->tx_rate_idx = 0;
1168 if (sta->tx_supp_rates & WLAN_RATE_1M) {
1169 sta->tx_max_rate = 0;
1170 if (ap_tx_rate_ok(0, sta, sta->local)) {
1171 sta->tx_rate = 10;
1172 sta->tx_rate_idx = 0;
1173 }
1174 }
1175 if (sta->tx_supp_rates & WLAN_RATE_2M) {
1176 sta->tx_max_rate = 1;
1177 if (ap_tx_rate_ok(1, sta, sta->local)) {
1178 sta->tx_rate = 20;
1179 sta->tx_rate_idx = 1;
1180 }
1181 }
1182 if (sta->tx_supp_rates & WLAN_RATE_5M5) {
1183 sta->tx_max_rate = 2;
1184 if (ap_tx_rate_ok(2, sta, sta->local)) {
1185 sta->tx_rate = 55;
1186 sta->tx_rate_idx = 2;
1187 }
1188 }
1189 if (sta->tx_supp_rates & WLAN_RATE_11M) {
1190 sta->tx_max_rate = 3;
1191 if (ap_tx_rate_ok(3, sta, sta->local)) {
1192 sta->tx_rate = 110;
1193 sta->tx_rate_idx = 3;
1194 }
1195 }
1196 }
1197
1198
1199 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1200
1201 static void ap_crypt_init(struct ap_data *ap)
1202 {
1203 ap->crypt = lib80211_get_crypto_ops("WEP");
1204
1205 if (ap->crypt) {
1206 if (ap->crypt->init) {
1207 ap->crypt_priv = ap->crypt->init(0);
1208 if (ap->crypt_priv == NULL)
1209 ap->crypt = NULL;
1210 else {
1211 u8 key[WEP_KEY_LEN];
1212 get_random_bytes(key, WEP_KEY_LEN);
1213 ap->crypt->set_key(key, WEP_KEY_LEN, NULL,
1214 ap->crypt_priv);
1215 }
1216 }
1217 }
1218
1219 if (ap->crypt == NULL) {
1220 printk(KERN_WARNING "AP could not initialize WEP: load module "
1221 "lib80211_crypt_wep.ko\n");
1222 }
1223 }
1224
1225
1226 /* Generate challenge data for shared key authentication. IEEE 802.11 specifies
1227 * that WEP algorithm is used for generating challenge. This should be unique,
1228 * but otherwise there is not really need for randomness etc. Initialize WEP
1229 * with pseudo random key and then use increasing IV to get unique challenge
1230 * streams.
1231 *
1232 * Called only as a scheduled task for pending AP frames.
1233 */
1234 static char * ap_auth_make_challenge(struct ap_data *ap)
1235 {
1236 char *tmpbuf;
1237 struct sk_buff *skb;
1238
1239 if (ap->crypt == NULL) {
1240 ap_crypt_init(ap);
1241 if (ap->crypt == NULL)
1242 return NULL;
1243 }
1244
1245 tmpbuf = kmalloc(WLAN_AUTH_CHALLENGE_LEN, GFP_ATOMIC);
1246 if (tmpbuf == NULL) {
1247 PDEBUG(DEBUG_AP, "AP: kmalloc failed for challenge\n");
1248 return NULL;
1249 }
1250
1251 skb = dev_alloc_skb(WLAN_AUTH_CHALLENGE_LEN +
1252 ap->crypt->extra_mpdu_prefix_len +
1253 ap->crypt->extra_mpdu_postfix_len);
1254 if (skb == NULL) {
1255 kfree(tmpbuf);
1256 return NULL;
1257 }
1258
1259 skb_reserve(skb, ap->crypt->extra_mpdu_prefix_len);
1260 memset(skb_put(skb, WLAN_AUTH_CHALLENGE_LEN), 0,
1261 WLAN_AUTH_CHALLENGE_LEN);
1262 if (ap->crypt->encrypt_mpdu(skb, 0, ap->crypt_priv)) {
1263 dev_kfree_skb(skb);
1264 kfree(tmpbuf);
1265 return NULL;
1266 }
1267
1268 skb_copy_from_linear_data_offset(skb, ap->crypt->extra_mpdu_prefix_len,
1269 tmpbuf, WLAN_AUTH_CHALLENGE_LEN);
1270 dev_kfree_skb(skb);
1271
1272 return tmpbuf;
1273 }
1274
1275
1276 /* Called only as a scheduled task for pending AP frames. */
1277 static void handle_authen(local_info_t *local, struct sk_buff *skb,
1278 struct hostap_80211_rx_status *rx_stats)
1279 {
1280 struct net_device *dev = local->dev;
1281 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1282 size_t hdrlen;
1283 struct ap_data *ap = local->ap;
1284 char body[8 + WLAN_AUTH_CHALLENGE_LEN], *challenge = NULL;
1285 int len, olen;
1286 u16 auth_alg, auth_transaction, status_code;
1287 __le16 *pos;
1288 u16 resp = WLAN_STATUS_SUCCESS;
1289 struct sta_info *sta = NULL;
1290 struct lib80211_crypt_data *crypt;
1291 char *txt = "";
1292
1293 len = skb->len - IEEE80211_MGMT_HDR_LEN;
1294
1295 hdrlen = hostap_80211_get_hdrlen(hdr->frame_control);
1296
1297 if (len < 6) {
1298 PDEBUG(DEBUG_AP, "%s: handle_authen - too short payload "
1299 "(len=%d) from %pM\n", dev->name, len, hdr->addr2);
1300 return;
1301 }
1302
1303 spin_lock_bh(&local->ap->sta_table_lock);
1304 sta = ap_get_sta(local->ap, hdr->addr2);
1305 if (sta)
1306 atomic_inc(&sta->users);
1307 spin_unlock_bh(&local->ap->sta_table_lock);
1308
1309 if (sta && sta->crypt)
1310 crypt = sta->crypt;
1311 else {
1312 int idx = 0;
1313 if (skb->len >= hdrlen + 3)
1314 idx = skb->data[hdrlen + 3] >> 6;
1315 crypt = local->crypt_info.crypt[idx];
1316 }
1317
1318 pos = (__le16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
1319 auth_alg = __le16_to_cpu(*pos);
1320 pos++;
1321 auth_transaction = __le16_to_cpu(*pos);
1322 pos++;
1323 status_code = __le16_to_cpu(*pos);
1324 pos++;
1325
1326 if (memcmp(dev->dev_addr, hdr->addr2, ETH_ALEN) == 0 ||
1327 ap_control_mac_deny(&ap->mac_restrictions, hdr->addr2)) {
1328 txt = "authentication denied";
1329 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1330 goto fail;
1331 }
1332
1333 if (((local->auth_algs & PRISM2_AUTH_OPEN) &&
1334 auth_alg == WLAN_AUTH_OPEN) ||
1335 ((local->auth_algs & PRISM2_AUTH_SHARED_KEY) &&
1336 crypt && auth_alg == WLAN_AUTH_SHARED_KEY)) {
1337 } else {
1338 txt = "unsupported algorithm";
1339 resp = WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG;
1340 goto fail;
1341 }
1342
1343 if (len >= 8) {
1344 u8 *u = (u8 *) pos;
1345 if (*u == WLAN_EID_CHALLENGE) {
1346 if (*(u + 1) != WLAN_AUTH_CHALLENGE_LEN) {
1347 txt = "invalid challenge len";
1348 resp = WLAN_STATUS_CHALLENGE_FAIL;
1349 goto fail;
1350 }
1351 if (len - 8 < WLAN_AUTH_CHALLENGE_LEN) {
1352 txt = "challenge underflow";
1353 resp = WLAN_STATUS_CHALLENGE_FAIL;
1354 goto fail;
1355 }
1356 challenge = (char *) (u + 2);
1357 }
1358 }
1359
1360 if (sta && sta->ap) {
1361 if (time_after(jiffies, sta->u.ap.last_beacon +
1362 (10 * sta->listen_interval * HZ) / 1024)) {
1363 PDEBUG(DEBUG_AP, "%s: no beacons received for a while,"
1364 " assuming AP %pM is now STA\n",
1365 dev->name, sta->addr);
1366 sta->ap = 0;
1367 sta->flags = 0;
1368 sta->u.sta.challenge = NULL;
1369 } else {
1370 txt = "AP trying to authenticate?";
1371 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1372 goto fail;
1373 }
1374 }
1375
1376 if ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 1) ||
1377 (auth_alg == WLAN_AUTH_SHARED_KEY &&
1378 (auth_transaction == 1 ||
1379 (auth_transaction == 3 && sta != NULL &&
1380 sta->u.sta.challenge != NULL)))) {
1381 } else {
1382 txt = "unknown authentication transaction number";
1383 resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION;
1384 goto fail;
1385 }
1386
1387 if (sta == NULL) {
1388 txt = "new STA";
1389
1390 if (local->ap->num_sta >= MAX_STA_COUNT) {
1391 /* FIX: might try to remove some old STAs first? */
1392 txt = "no more room for new STAs";
1393 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1394 goto fail;
1395 }
1396
1397 sta = ap_add_sta(local->ap, hdr->addr2);
1398 if (sta == NULL) {
1399 txt = "ap_add_sta failed";
1400 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1401 goto fail;
1402 }
1403 }
1404
1405 switch (auth_alg) {
1406 case WLAN_AUTH_OPEN:
1407 txt = "authOK";
1408 /* IEEE 802.11 standard is not completely clear about
1409 * whether STA is considered authenticated after
1410 * authentication OK frame has been send or after it
1411 * has been ACKed. In order to reduce interoperability
1412 * issues, mark the STA authenticated before ACK. */
1413 sta->flags |= WLAN_STA_AUTH;
1414 break;
1415
1416 case WLAN_AUTH_SHARED_KEY:
1417 if (auth_transaction == 1) {
1418 if (sta->u.sta.challenge == NULL) {
1419 sta->u.sta.challenge =
1420 ap_auth_make_challenge(local->ap);
1421 if (sta->u.sta.challenge == NULL) {
1422 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1423 goto fail;
1424 }
1425 }
1426 } else {
1427 if (sta->u.sta.challenge == NULL ||
1428 challenge == NULL ||
1429 memcmp(sta->u.sta.challenge, challenge,
1430 WLAN_AUTH_CHALLENGE_LEN) != 0 ||
1431 !ieee80211_has_protected(hdr->frame_control)) {
1432 txt = "challenge response incorrect";
1433 resp = WLAN_STATUS_CHALLENGE_FAIL;
1434 goto fail;
1435 }
1436
1437 txt = "challenge OK - authOK";
1438 /* IEEE 802.11 standard is not completely clear about
1439 * whether STA is considered authenticated after
1440 * authentication OK frame has been send or after it
1441 * has been ACKed. In order to reduce interoperability
1442 * issues, mark the STA authenticated before ACK. */
1443 sta->flags |= WLAN_STA_AUTH;
1444 kfree(sta->u.sta.challenge);
1445 sta->u.sta.challenge = NULL;
1446 }
1447 break;
1448 }
1449
1450 fail:
1451 pos = (__le16 *) body;
1452 *pos = cpu_to_le16(auth_alg);
1453 pos++;
1454 *pos = cpu_to_le16(auth_transaction + 1);
1455 pos++;
1456 *pos = cpu_to_le16(resp); /* status_code */
1457 pos++;
1458 olen = 6;
1459
1460 if (resp == WLAN_STATUS_SUCCESS && sta != NULL &&
1461 sta->u.sta.challenge != NULL &&
1462 auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 1) {
1463 u8 *tmp = (u8 *) pos;
1464 *tmp++ = WLAN_EID_CHALLENGE;
1465 *tmp++ = WLAN_AUTH_CHALLENGE_LEN;
1466 pos++;
1467 memcpy(pos, sta->u.sta.challenge, WLAN_AUTH_CHALLENGE_LEN);
1468 olen += 2 + WLAN_AUTH_CHALLENGE_LEN;
1469 }
1470
1471 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_AUTH,
1472 body, olen, hdr->addr2, ap->tx_callback_auth);
1473
1474 if (sta) {
1475 sta->last_rx = jiffies;
1476 atomic_dec(&sta->users);
1477 }
1478
1479 if (resp) {
1480 PDEBUG(DEBUG_AP, "%s: %pM auth (alg=%d "
1481 "trans#=%d stat=%d len=%d fc=%04x) ==> %d (%s)\n",
1482 dev->name, hdr->addr2,
1483 auth_alg, auth_transaction, status_code, len,
1484 le16_to_cpu(hdr->frame_control), resp, txt);
1485 }
1486 }
1487
1488
1489 /* Called only as a scheduled task for pending AP frames. */
1490 static void handle_assoc(local_info_t *local, struct sk_buff *skb,
1491 struct hostap_80211_rx_status *rx_stats, int reassoc)
1492 {
1493 struct net_device *dev = local->dev;
1494 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1495 char body[12], *p, *lpos;
1496 int len, left;
1497 __le16 *pos;
1498 u16 resp = WLAN_STATUS_SUCCESS;
1499 struct sta_info *sta = NULL;
1500 int send_deauth = 0;
1501 char *txt = "";
1502 u8 prev_ap[ETH_ALEN];
1503
1504 left = len = skb->len - IEEE80211_MGMT_HDR_LEN;
1505
1506 if (len < (reassoc ? 10 : 4)) {
1507 PDEBUG(DEBUG_AP, "%s: handle_assoc - too short payload "
1508 "(len=%d, reassoc=%d) from %pM\n",
1509 dev->name, len, reassoc, hdr->addr2);
1510 return;
1511 }
1512
1513 spin_lock_bh(&local->ap->sta_table_lock);
1514 sta = ap_get_sta(local->ap, hdr->addr2);
1515 if (sta == NULL || (sta->flags & WLAN_STA_AUTH) == 0) {
1516 spin_unlock_bh(&local->ap->sta_table_lock);
1517 txt = "trying to associate before authentication";
1518 send_deauth = 1;
1519 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1520 sta = NULL; /* do not decrement sta->users */
1521 goto fail;
1522 }
1523 atomic_inc(&sta->users);
1524 spin_unlock_bh(&local->ap->sta_table_lock);
1525
1526 pos = (__le16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
1527 sta->capability = __le16_to_cpu(*pos);
1528 pos++; left -= 2;
1529 sta->listen_interval = __le16_to_cpu(*pos);
1530 pos++; left -= 2;
1531
1532 if (reassoc) {
1533 memcpy(prev_ap, pos, ETH_ALEN);
1534 pos++; pos++; pos++; left -= 6;
1535 } else
1536 memset(prev_ap, 0, ETH_ALEN);
1537
1538 if (left >= 2) {
1539 unsigned int ileft;
1540 unsigned char *u = (unsigned char *) pos;
1541
1542 if (*u == WLAN_EID_SSID) {
1543 u++; left--;
1544 ileft = *u;
1545 u++; left--;
1546
1547 if (ileft > left || ileft > MAX_SSID_LEN) {
1548 txt = "SSID overflow";
1549 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1550 goto fail;
1551 }
1552
1553 if (ileft != strlen(local->essid) ||
1554 memcmp(local->essid, u, ileft) != 0) {
1555 txt = "not our SSID";
1556 resp = WLAN_STATUS_ASSOC_DENIED_UNSPEC;
1557 goto fail;
1558 }
1559
1560 u += ileft;
1561 left -= ileft;
1562 }
1563
1564 if (left >= 2 && *u == WLAN_EID_SUPP_RATES) {
1565 u++; left--;
1566 ileft = *u;
1567 u++; left--;
1568
1569 if (ileft > left || ileft == 0 ||
1570 ileft > WLAN_SUPP_RATES_MAX) {
1571 txt = "SUPP_RATES len error";
1572 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1573 goto fail;
1574 }
1575
1576 memset(sta->supported_rates, 0,
1577 sizeof(sta->supported_rates));
1578 memcpy(sta->supported_rates, u, ileft);
1579 prism2_check_tx_rates(sta);
1580
1581 u += ileft;
1582 left -= ileft;
1583 }
1584
1585 if (left > 0) {
1586 PDEBUG(DEBUG_AP, "%s: assoc from %pM"
1587 " with extra data (%d bytes) [",
1588 dev->name, hdr->addr2, left);
1589 while (left > 0) {
1590 PDEBUG2(DEBUG_AP, "<%02x>", *u);
1591 u++; left--;
1592 }
1593 PDEBUG2(DEBUG_AP, "]\n");
1594 }
1595 } else {
1596 txt = "frame underflow";
1597 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1598 goto fail;
1599 }
1600
1601 /* get a unique AID */
1602 if (sta->aid > 0)
1603 txt = "OK, old AID";
1604 else {
1605 spin_lock_bh(&local->ap->sta_table_lock);
1606 for (sta->aid = 1; sta->aid <= MAX_AID_TABLE_SIZE; sta->aid++)
1607 if (local->ap->sta_aid[sta->aid - 1] == NULL)
1608 break;
1609 if (sta->aid > MAX_AID_TABLE_SIZE) {
1610 sta->aid = 0;
1611 spin_unlock_bh(&local->ap->sta_table_lock);
1612 resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
1613 txt = "no room for more AIDs";
1614 } else {
1615 local->ap->sta_aid[sta->aid - 1] = sta;
1616 spin_unlock_bh(&local->ap->sta_table_lock);
1617 txt = "OK, new AID";
1618 }
1619 }
1620
1621 fail:
1622 pos = (__le16 *) body;
1623
1624 if (send_deauth) {
1625 *pos = cpu_to_le16(WLAN_REASON_STA_REQ_ASSOC_WITHOUT_AUTH);
1626 pos++;
1627 } else {
1628 /* FIX: CF-Pollable and CF-PollReq should be set to match the
1629 * values in beacons/probe responses */
1630 /* FIX: how about privacy and WEP? */
1631 /* capability */
1632 *pos = cpu_to_le16(WLAN_CAPABILITY_ESS);
1633 pos++;
1634
1635 /* status_code */
1636 *pos = cpu_to_le16(resp);
1637 pos++;
1638
1639 *pos = cpu_to_le16((sta && sta->aid > 0 ? sta->aid : 0) |
1640 BIT(14) | BIT(15)); /* AID */
1641 pos++;
1642
1643 /* Supported rates (Information element) */
1644 p = (char *) pos;
1645 *p++ = WLAN_EID_SUPP_RATES;
1646 lpos = p;
1647 *p++ = 0; /* len */
1648 if (local->tx_rate_control & WLAN_RATE_1M) {
1649 *p++ = local->basic_rates & WLAN_RATE_1M ? 0x82 : 0x02;
1650 (*lpos)++;
1651 }
1652 if (local->tx_rate_control & WLAN_RATE_2M) {
1653 *p++ = local->basic_rates & WLAN_RATE_2M ? 0x84 : 0x04;
1654 (*lpos)++;
1655 }
1656 if (local->tx_rate_control & WLAN_RATE_5M5) {
1657 *p++ = local->basic_rates & WLAN_RATE_5M5 ?
1658 0x8b : 0x0b;
1659 (*lpos)++;
1660 }
1661 if (local->tx_rate_control & WLAN_RATE_11M) {
1662 *p++ = local->basic_rates & WLAN_RATE_11M ?
1663 0x96 : 0x16;
1664 (*lpos)++;
1665 }
1666 pos = (__le16 *) p;
1667 }
1668
1669 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT |
1670 (send_deauth ? IEEE80211_STYPE_DEAUTH :
1671 (reassoc ? IEEE80211_STYPE_REASSOC_RESP :
1672 IEEE80211_STYPE_ASSOC_RESP)),
1673 body, (u8 *) pos - (u8 *) body,
1674 hdr->addr2,
1675 send_deauth ? 0 : local->ap->tx_callback_assoc);
1676
1677 if (sta) {
1678 if (resp == WLAN_STATUS_SUCCESS) {
1679 sta->last_rx = jiffies;
1680 /* STA will be marked associated from TX callback, if
1681 * AssocResp is ACKed */
1682 }
1683 atomic_dec(&sta->users);
1684 }
1685
1686 #if 0
1687 PDEBUG(DEBUG_AP, "%s: %pM %sassoc (len=%d "
1688 "prev_ap=%pM) => %d(%d) (%s)\n",
1689 dev->name,
1690 hdr->addr2,
1691 reassoc ? "re" : "", len,
1692 prev_ap,
1693 resp, send_deauth, txt);
1694 #endif
1695 }
1696
1697
1698 /* Called only as a scheduled task for pending AP frames. */
1699 static void handle_deauth(local_info_t *local, struct sk_buff *skb,
1700 struct hostap_80211_rx_status *rx_stats)
1701 {
1702 struct net_device *dev = local->dev;
1703 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1704 char *body = (char *) (skb->data + IEEE80211_MGMT_HDR_LEN);
1705 int len;
1706 u16 reason_code;
1707 __le16 *pos;
1708 struct sta_info *sta = NULL;
1709
1710 len = skb->len - IEEE80211_MGMT_HDR_LEN;
1711
1712 if (len < 2) {
1713 printk("handle_deauth - too short payload (len=%d)\n", len);
1714 return;
1715 }
1716
1717 pos = (__le16 *) body;
1718 reason_code = le16_to_cpu(*pos);
1719
1720 PDEBUG(DEBUG_AP, "%s: deauthentication: %pM len=%d, "
1721 "reason_code=%d\n", dev->name, hdr->addr2,
1722 len, reason_code);
1723
1724 spin_lock_bh(&local->ap->sta_table_lock);
1725 sta = ap_get_sta(local->ap, hdr->addr2);
1726 if (sta != NULL) {
1727 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap)
1728 hostap_event_expired_sta(local->dev, sta);
1729 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
1730 }
1731 spin_unlock_bh(&local->ap->sta_table_lock);
1732 if (sta == NULL) {
1733 printk("%s: deauthentication from %pM, "
1734 "reason_code=%d, but STA not authenticated\n", dev->name,
1735 hdr->addr2, reason_code);
1736 }
1737 }
1738
1739
1740 /* Called only as a scheduled task for pending AP frames. */
1741 static void handle_disassoc(local_info_t *local, struct sk_buff *skb,
1742 struct hostap_80211_rx_status *rx_stats)
1743 {
1744 struct net_device *dev = local->dev;
1745 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1746 char *body = skb->data + IEEE80211_MGMT_HDR_LEN;
1747 int len;
1748 u16 reason_code;
1749 __le16 *pos;
1750 struct sta_info *sta = NULL;
1751
1752 len = skb->len - IEEE80211_MGMT_HDR_LEN;
1753
1754 if (len < 2) {
1755 printk("handle_disassoc - too short payload (len=%d)\n", len);
1756 return;
1757 }
1758
1759 pos = (__le16 *) body;
1760 reason_code = le16_to_cpu(*pos);
1761
1762 PDEBUG(DEBUG_AP, "%s: disassociation: %pM len=%d, "
1763 "reason_code=%d\n", dev->name, hdr->addr2,
1764 len, reason_code);
1765
1766 spin_lock_bh(&local->ap->sta_table_lock);
1767 sta = ap_get_sta(local->ap, hdr->addr2);
1768 if (sta != NULL) {
1769 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap)
1770 hostap_event_expired_sta(local->dev, sta);
1771 sta->flags &= ~WLAN_STA_ASSOC;
1772 }
1773 spin_unlock_bh(&local->ap->sta_table_lock);
1774 if (sta == NULL) {
1775 printk("%s: disassociation from %pM, "
1776 "reason_code=%d, but STA not authenticated\n",
1777 dev->name, hdr->addr2, reason_code);
1778 }
1779 }
1780
1781
1782 /* Called only as a scheduled task for pending AP frames. */
1783 static void ap_handle_data_nullfunc(local_info_t *local,
1784 struct ieee80211_hdr *hdr)
1785 {
1786 struct net_device *dev = local->dev;
1787
1788 /* some STA f/w's seem to require control::ACK frame for
1789 * data::nullfunc, but at least Prism2 station f/w version 0.8.0 does
1790 * not send this..
1791 * send control::ACK for the data::nullfunc */
1792
1793 printk(KERN_DEBUG "Sending control::ACK for data::nullfunc\n");
1794 prism2_send_mgmt(dev, IEEE80211_FTYPE_CTL | IEEE80211_STYPE_ACK,
1795 NULL, 0, hdr->addr2, 0);
1796 }
1797
1798
1799 /* Called only as a scheduled task for pending AP frames. */
1800 static void ap_handle_dropped_data(local_info_t *local,
1801 struct ieee80211_hdr *hdr)
1802 {
1803 struct net_device *dev = local->dev;
1804 struct sta_info *sta;
1805 __le16 reason;
1806
1807 spin_lock_bh(&local->ap->sta_table_lock);
1808 sta = ap_get_sta(local->ap, hdr->addr2);
1809 if (sta)
1810 atomic_inc(&sta->users);
1811 spin_unlock_bh(&local->ap->sta_table_lock);
1812
1813 if (sta != NULL && (sta->flags & WLAN_STA_ASSOC)) {
1814 PDEBUG(DEBUG_AP, "ap_handle_dropped_data: STA is now okay?\n");
1815 atomic_dec(&sta->users);
1816 return;
1817 }
1818
1819 reason = cpu_to_le16(WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
1820 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT |
1821 ((sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) ?
1822 IEEE80211_STYPE_DEAUTH : IEEE80211_STYPE_DISASSOC),
1823 (char *) &reason, sizeof(reason), hdr->addr2, 0);
1824
1825 if (sta)
1826 atomic_dec(&sta->users);
1827 }
1828
1829 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1830
1831
1832 /* Called only as a scheduled task for pending AP frames. */
1833 static void pspoll_send_buffered(local_info_t *local, struct sta_info *sta,
1834 struct sk_buff *skb)
1835 {
1836 struct hostap_skb_tx_data *meta;
1837
1838 if (!(sta->flags & WLAN_STA_PS)) {
1839 /* Station has moved to non-PS mode, so send all buffered
1840 * frames using normal device queue. */
1841 dev_queue_xmit(skb);
1842 return;
1843 }
1844
1845 /* add a flag for hostap_handle_sta_tx() to know that this skb should
1846 * be passed through even though STA is using PS */
1847 meta = (struct hostap_skb_tx_data *) skb->cb;
1848 meta->flags |= HOSTAP_TX_FLAGS_BUFFERED_FRAME;
1849 if (!skb_queue_empty(&sta->tx_buf)) {
1850 /* indicate to STA that more frames follow */
1851 meta->flags |= HOSTAP_TX_FLAGS_ADD_MOREDATA;
1852 }
1853 dev_queue_xmit(skb);
1854 }
1855
1856
1857 /* Called only as a scheduled task for pending AP frames. */
1858 static void handle_pspoll(local_info_t *local,
1859 struct ieee80211_hdr *hdr,
1860 struct hostap_80211_rx_status *rx_stats)
1861 {
1862 struct net_device *dev = local->dev;
1863 struct sta_info *sta;
1864 u16 aid;
1865 struct sk_buff *skb;
1866
1867 PDEBUG(DEBUG_PS2, "handle_pspoll: BSSID=%pM, TA=%pM PWRMGT=%d\n",
1868 hdr->addr1, hdr->addr2, !!ieee80211_has_pm(hdr->frame_control));
1869
1870 if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN)) {
1871 PDEBUG(DEBUG_AP,
1872 "handle_pspoll - addr1(BSSID)=%pM not own MAC\n",
1873 hdr->addr1);
1874 return;
1875 }
1876
1877 aid = le16_to_cpu(hdr->duration_id);
1878 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) {
1879 PDEBUG(DEBUG_PS, " PSPOLL and AID[15:14] not set\n");
1880 return;
1881 }
1882 aid &= ~(BIT(15) | BIT(14));
1883 if (aid == 0 || aid > MAX_AID_TABLE_SIZE) {
1884 PDEBUG(DEBUG_PS, " invalid aid=%d\n", aid);
1885 return;
1886 }
1887 PDEBUG(DEBUG_PS2, " aid=%d\n", aid);
1888
1889 spin_lock_bh(&local->ap->sta_table_lock);
1890 sta = ap_get_sta(local->ap, hdr->addr2);
1891 if (sta)
1892 atomic_inc(&sta->users);
1893 spin_unlock_bh(&local->ap->sta_table_lock);
1894
1895 if (sta == NULL) {
1896 PDEBUG(DEBUG_PS, " STA not found\n");
1897 return;
1898 }
1899 if (sta->aid != aid) {
1900 PDEBUG(DEBUG_PS, " received aid=%i does not match with "
1901 "assoc.aid=%d\n", aid, sta->aid);
1902 return;
1903 }
1904
1905 /* FIX: todo:
1906 * - add timeout for buffering (clear aid in TIM vector if buffer timed
1907 * out (expiry time must be longer than ListenInterval for
1908 * the corresponding STA; "8802-11: 11.2.1.9 AP aging function"
1909 * - what to do, if buffered, pspolled, and sent frame is not ACKed by
1910 * sta; store buffer for later use and leave TIM aid bit set? use
1911 * TX event to check whether frame was ACKed?
1912 */
1913
1914 while ((skb = skb_dequeue(&sta->tx_buf)) != NULL) {
1915 /* send buffered frame .. */
1916 PDEBUG(DEBUG_PS2, "Sending buffered frame to STA after PS POLL"
1917 " (buffer_count=%d)\n", skb_queue_len(&sta->tx_buf));
1918
1919 pspoll_send_buffered(local, sta, skb);
1920
1921 if (sta->flags & WLAN_STA_PS) {
1922 /* send only one buffered packet per PS Poll */
1923 /* FIX: should ignore further PS Polls until the
1924 * buffered packet that was just sent is acknowledged
1925 * (Tx or TxExc event) */
1926 break;
1927 }
1928 }
1929
1930 if (skb_queue_empty(&sta->tx_buf)) {
1931 /* try to clear aid from TIM */
1932 if (!(sta->flags & WLAN_STA_TIM))
1933 PDEBUG(DEBUG_PS2, "Re-unsetting TIM for aid %d\n",
1934 aid);
1935 hostap_set_tim(local, aid, 0);
1936 sta->flags &= ~WLAN_STA_TIM;
1937 }
1938
1939 atomic_dec(&sta->users);
1940 }
1941
1942
1943 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1944
1945 static void handle_wds_oper_queue(struct work_struct *work)
1946 {
1947 struct ap_data *ap = container_of(work, struct ap_data,
1948 wds_oper_queue);
1949 local_info_t *local = ap->local;
1950 struct wds_oper_data *entry, *prev;
1951
1952 spin_lock_bh(&local->lock);
1953 entry = local->ap->wds_oper_entries;
1954 local->ap->wds_oper_entries = NULL;
1955 spin_unlock_bh(&local->lock);
1956
1957 while (entry) {
1958 PDEBUG(DEBUG_AP, "%s: %s automatic WDS connection "
1959 "to AP %pM\n",
1960 local->dev->name,
1961 entry->type == WDS_ADD ? "adding" : "removing",
1962 entry->addr);
1963 if (entry->type == WDS_ADD)
1964 prism2_wds_add(local, entry->addr, 0);
1965 else if (entry->type == WDS_DEL)
1966 prism2_wds_del(local, entry->addr, 0, 1);
1967
1968 prev = entry;
1969 entry = entry->next;
1970 kfree(prev);
1971 }
1972 }
1973
1974
1975 /* Called only as a scheduled task for pending AP frames. */
1976 static void handle_beacon(local_info_t *local, struct sk_buff *skb,
1977 struct hostap_80211_rx_status *rx_stats)
1978 {
1979 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1980 char *body = skb->data + IEEE80211_MGMT_HDR_LEN;
1981 int len, left;
1982 u16 beacon_int, capability;
1983 __le16 *pos;
1984 char *ssid = NULL;
1985 unsigned char *supp_rates = NULL;
1986 int ssid_len = 0, supp_rates_len = 0;
1987 struct sta_info *sta = NULL;
1988 int new_sta = 0, channel = -1;
1989
1990 len = skb->len - IEEE80211_MGMT_HDR_LEN;
1991
1992 if (len < 8 + 2 + 2) {
1993 printk(KERN_DEBUG "handle_beacon - too short payload "
1994 "(len=%d)\n", len);
1995 return;
1996 }
1997
1998 pos = (__le16 *) body;
1999 left = len;
2000
2001 /* Timestamp (8 octets) */
2002 pos += 4; left -= 8;
2003 /* Beacon interval (2 octets) */
2004 beacon_int = le16_to_cpu(*pos);
2005 pos++; left -= 2;
2006 /* Capability information (2 octets) */
2007 capability = le16_to_cpu(*pos);
2008 pos++; left -= 2;
2009
2010 if (local->ap->ap_policy != AP_OTHER_AP_EVEN_IBSS &&
2011 capability & WLAN_CAPABILITY_IBSS)
2012 return;
2013
2014 if (left >= 2) {
2015 unsigned int ileft;
2016 unsigned char *u = (unsigned char *) pos;
2017
2018 if (*u == WLAN_EID_SSID) {
2019 u++; left--;
2020 ileft = *u;
2021 u++; left--;
2022
2023 if (ileft > left || ileft > MAX_SSID_LEN) {
2024 PDEBUG(DEBUG_AP, "SSID: overflow\n");
2025 return;
2026 }
2027
2028 if (local->ap->ap_policy == AP_OTHER_AP_SAME_SSID &&
2029 (ileft != strlen(local->essid) ||
2030 memcmp(local->essid, u, ileft) != 0)) {
2031 /* not our SSID */
2032 return;
2033 }
2034
2035 ssid = u;
2036 ssid_len = ileft;
2037
2038 u += ileft;
2039 left -= ileft;
2040 }
2041
2042 if (*u == WLAN_EID_SUPP_RATES) {
2043 u++; left--;
2044 ileft = *u;
2045 u++; left--;
2046
2047 if (ileft > left || ileft == 0 || ileft > 8) {
2048 PDEBUG(DEBUG_AP, " - SUPP_RATES len error\n");
2049 return;
2050 }
2051
2052 supp_rates = u;
2053 supp_rates_len = ileft;
2054
2055 u += ileft;
2056 left -= ileft;
2057 }
2058
2059 if (*u == WLAN_EID_DS_PARAMS) {
2060 u++; left--;
2061 ileft = *u;
2062 u++; left--;
2063
2064 if (ileft > left || ileft != 1) {
2065 PDEBUG(DEBUG_AP, " - DS_PARAMS len error\n");
2066 return;
2067 }
2068
2069 channel = *u;
2070
2071 u += ileft;
2072 left -= ileft;
2073 }
2074 }
2075
2076 spin_lock_bh(&local->ap->sta_table_lock);
2077 sta = ap_get_sta(local->ap, hdr->addr2);
2078 if (sta != NULL)
2079 atomic_inc(&sta->users);
2080 spin_unlock_bh(&local->ap->sta_table_lock);
2081
2082 if (sta == NULL) {
2083 /* add new AP */
2084 new_sta = 1;
2085 sta = ap_add_sta(local->ap, hdr->addr2);
2086 if (sta == NULL) {
2087 printk(KERN_INFO "prism2: kmalloc failed for AP "
2088 "data structure\n");
2089 return;
2090 }
2091 hostap_event_new_sta(local->dev, sta);
2092
2093 /* mark APs authentication and associated for pseudo ad-hoc
2094 * style communication */
2095 sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
2096
2097 if (local->ap->autom_ap_wds) {
2098 hostap_wds_link_oper(local, sta->addr, WDS_ADD);
2099 }
2100 }
2101
2102 sta->ap = 1;
2103 if (ssid) {
2104 sta->u.ap.ssid_len = ssid_len;
2105 memcpy(sta->u.ap.ssid, ssid, ssid_len);
2106 sta->u.ap.ssid[ssid_len] = '\0';
2107 } else {
2108 sta->u.ap.ssid_len = 0;
2109 sta->u.ap.ssid[0] = '\0';
2110 }
2111 sta->u.ap.channel = channel;
2112 sta->rx_packets++;
2113 sta->rx_bytes += len;
2114 sta->u.ap.last_beacon = sta->last_rx = jiffies;
2115 sta->capability = capability;
2116 sta->listen_interval = beacon_int;
2117
2118 atomic_dec(&sta->users);
2119
2120 if (new_sta) {
2121 memset(sta->supported_rates, 0, sizeof(sta->supported_rates));
2122 memcpy(sta->supported_rates, supp_rates, supp_rates_len);
2123 prism2_check_tx_rates(sta);
2124 }
2125 }
2126
2127 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2128
2129
2130 /* Called only as a tasklet. */
2131 static void handle_ap_item(local_info_t *local, struct sk_buff *skb,
2132 struct hostap_80211_rx_status *rx_stats)
2133 {
2134 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2135 struct net_device *dev = local->dev;
2136 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2137 u16 fc, type, stype;
2138 struct ieee80211_hdr *hdr;
2139
2140 /* FIX: should give skb->len to handler functions and check that the
2141 * buffer is long enough */
2142 hdr = (struct ieee80211_hdr *) skb->data;
2143 fc = le16_to_cpu(hdr->frame_control);
2144 type = fc & IEEE80211_FCTL_FTYPE;
2145 stype = fc & IEEE80211_FCTL_STYPE;
2146
2147 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2148 if (!local->hostapd && type == IEEE80211_FTYPE_DATA) {
2149 PDEBUG(DEBUG_AP, "handle_ap_item - data frame\n");
2150
2151 if (!(fc & IEEE80211_FCTL_TODS) ||
2152 (fc & IEEE80211_FCTL_FROMDS)) {
2153 if (stype == IEEE80211_STYPE_NULLFUNC) {
2154 /* no ToDS nullfunc seems to be used to check
2155 * AP association; so send reject message to
2156 * speed up re-association */
2157 ap_handle_dropped_data(local, hdr);
2158 goto done;
2159 }
2160 PDEBUG(DEBUG_AP, " not ToDS frame (fc=0x%04x)\n",
2161 fc);
2162 goto done;
2163 }
2164
2165 if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN)) {
2166 PDEBUG(DEBUG_AP, "handle_ap_item - addr1(BSSID)=%pM"
2167 " not own MAC\n", hdr->addr1);
2168 goto done;
2169 }
2170
2171 if (local->ap->nullfunc_ack &&
2172 stype == IEEE80211_STYPE_NULLFUNC)
2173 ap_handle_data_nullfunc(local, hdr);
2174 else
2175 ap_handle_dropped_data(local, hdr);
2176 goto done;
2177 }
2178
2179 if (type == IEEE80211_FTYPE_MGMT && stype == IEEE80211_STYPE_BEACON) {
2180 handle_beacon(local, skb, rx_stats);
2181 goto done;
2182 }
2183 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2184
2185 if (type == IEEE80211_FTYPE_CTL && stype == IEEE80211_STYPE_PSPOLL) {
2186 handle_pspoll(local, hdr, rx_stats);
2187 goto done;
2188 }
2189
2190 if (local->hostapd) {
2191 PDEBUG(DEBUG_AP, "Unknown frame in AP queue: type=0x%02x "
2192 "subtype=0x%02x\n", type, stype);
2193 goto done;
2194 }
2195
2196 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2197 if (type != IEEE80211_FTYPE_MGMT) {
2198 PDEBUG(DEBUG_AP, "handle_ap_item - not a management frame?\n");
2199 goto done;
2200 }
2201
2202 if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN)) {
2203 PDEBUG(DEBUG_AP, "handle_ap_item - addr1(DA)=%pM"
2204 " not own MAC\n", hdr->addr1);
2205 goto done;
2206 }
2207
2208 if (memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN)) {
2209 PDEBUG(DEBUG_AP, "handle_ap_item - addr3(BSSID)=%pM"
2210 " not own MAC\n", hdr->addr3);
2211 goto done;
2212 }
2213
2214 switch (stype) {
2215 case IEEE80211_STYPE_ASSOC_REQ:
2216 handle_assoc(local, skb, rx_stats, 0);
2217 break;
2218 case IEEE80211_STYPE_ASSOC_RESP:
2219 PDEBUG(DEBUG_AP, "==> ASSOC RESP (ignored)\n");
2220 break;
2221 case IEEE80211_STYPE_REASSOC_REQ:
2222 handle_assoc(local, skb, rx_stats, 1);
2223 break;
2224 case IEEE80211_STYPE_REASSOC_RESP:
2225 PDEBUG(DEBUG_AP, "==> REASSOC RESP (ignored)\n");
2226 break;
2227 case IEEE80211_STYPE_ATIM:
2228 PDEBUG(DEBUG_AP, "==> ATIM (ignored)\n");
2229 break;
2230 case IEEE80211_STYPE_DISASSOC:
2231 handle_disassoc(local, skb, rx_stats);
2232 break;
2233 case IEEE80211_STYPE_AUTH:
2234 handle_authen(local, skb, rx_stats);
2235 break;
2236 case IEEE80211_STYPE_DEAUTH:
2237 handle_deauth(local, skb, rx_stats);
2238 break;
2239 default:
2240 PDEBUG(DEBUG_AP, "Unknown mgmt frame subtype 0x%02x\n",
2241 stype >> 4);
2242 break;
2243 }
2244 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2245
2246 done:
2247 dev_kfree_skb(skb);
2248 }
2249
2250
2251 /* Called only as a tasklet (software IRQ) */
2252 void hostap_rx(struct net_device *dev, struct sk_buff *skb,
2253 struct hostap_80211_rx_status *rx_stats)
2254 {
2255 struct hostap_interface *iface;
2256 local_info_t *local;
2257 struct ieee80211_hdr *hdr;
2258
2259 iface = netdev_priv(dev);
2260 local = iface->local;
2261
2262 if (skb->len < 16)
2263 goto drop;
2264
2265 dev->stats.rx_packets++;
2266
2267 hdr = (struct ieee80211_hdr *) skb->data;
2268
2269 if (local->ap->ap_policy == AP_OTHER_AP_SKIP_ALL &&
2270 ieee80211_is_beacon(hdr->frame_control))
2271 goto drop;
2272
2273 skb->protocol = cpu_to_be16(ETH_P_HOSTAP);
2274 handle_ap_item(local, skb, rx_stats);
2275 return;
2276
2277 drop:
2278 dev_kfree_skb(skb);
2279 }
2280
2281
2282 /* Called only as a tasklet (software IRQ) */
2283 static void schedule_packet_send(local_info_t *local, struct sta_info *sta)
2284 {
2285 struct sk_buff *skb;
2286 struct ieee80211_hdr *hdr;
2287 struct hostap_80211_rx_status rx_stats;
2288
2289 if (skb_queue_empty(&sta->tx_buf))
2290 return;
2291
2292 skb = dev_alloc_skb(16);
2293 if (skb == NULL) {
2294 printk(KERN_DEBUG "%s: schedule_packet_send: skb alloc "
2295 "failed\n", local->dev->name);
2296 return;
2297 }
2298
2299 hdr = (struct ieee80211_hdr *) skb_put(skb, 16);
2300
2301 /* Generate a fake pspoll frame to start packet delivery */
2302 hdr->frame_control = cpu_to_le16(
2303 IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL);
2304 memcpy(hdr->addr1, local->dev->dev_addr, ETH_ALEN);
2305 memcpy(hdr->addr2, sta->addr, ETH_ALEN);
2306 hdr->duration_id = cpu_to_le16(sta->aid | BIT(15) | BIT(14));
2307
2308 PDEBUG(DEBUG_PS2,
2309 "%s: Scheduling buffered packet delivery for STA %pM\n",
2310 local->dev->name, sta->addr);
2311
2312 skb->dev = local->dev;
2313
2314 memset(&rx_stats, 0, sizeof(rx_stats));
2315 hostap_rx(local->dev, skb, &rx_stats);
2316 }
2317
2318
2319 int prism2_ap_get_sta_qual(local_info_t *local, struct sockaddr addr[],
2320 struct iw_quality qual[], int buf_size,
2321 int aplist)
2322 {
2323 struct ap_data *ap = local->ap;
2324 struct list_head *ptr;
2325 int count = 0;
2326
2327 spin_lock_bh(&ap->sta_table_lock);
2328
2329 for (ptr = ap->sta_list.next; ptr != NULL && ptr != &ap->sta_list;
2330 ptr = ptr->next) {
2331 struct sta_info *sta = (struct sta_info *) ptr;
2332
2333 if (aplist && !sta->ap)
2334 continue;
2335 addr[count].sa_family = ARPHRD_ETHER;
2336 memcpy(addr[count].sa_data, sta->addr, ETH_ALEN);
2337 if (sta->last_rx_silence == 0)
2338 qual[count].qual = sta->last_rx_signal < 27 ?
2339 0 : (sta->last_rx_signal - 27) * 92 / 127;
2340 else
2341 qual[count].qual = sta->last_rx_signal -
2342 sta->last_rx_silence - 35;
2343 qual[count].level = HFA384X_LEVEL_TO_dBm(sta->last_rx_signal);
2344 qual[count].noise = HFA384X_LEVEL_TO_dBm(sta->last_rx_silence);
2345 qual[count].updated = sta->last_rx_updated;
2346
2347 sta->last_rx_updated = IW_QUAL_DBM;
2348
2349 count++;
2350 if (count >= buf_size)
2351 break;
2352 }
2353 spin_unlock_bh(&ap->sta_table_lock);
2354
2355 return count;
2356 }
2357
2358
2359 /* Translate our list of Access Points & Stations to a card independant
2360 * format that the Wireless Tools will understand - Jean II */
2361 int prism2_ap_translate_scan(struct net_device *dev,
2362 struct iw_request_info *info, char *buffer)
2363 {
2364 struct hostap_interface *iface;
2365 local_info_t *local;
2366 struct ap_data *ap;
2367 struct list_head *ptr;
2368 struct iw_event iwe;
2369 char *current_ev = buffer;
2370 char *end_buf = buffer + IW_SCAN_MAX_DATA;
2371 #if !defined(PRISM2_NO_KERNEL_IEEE80211_MGMT)
2372 char buf[64];
2373 #endif
2374
2375 iface = netdev_priv(dev);
2376 local = iface->local;
2377 ap = local->ap;
2378
2379 spin_lock_bh(&ap->sta_table_lock);
2380
2381 for (ptr = ap->sta_list.next; ptr != NULL && ptr != &ap->sta_list;
2382 ptr = ptr->next) {
2383 struct sta_info *sta = (struct sta_info *) ptr;
2384
2385 /* First entry *MUST* be the AP MAC address */
2386 memset(&iwe, 0, sizeof(iwe));
2387 iwe.cmd = SIOCGIWAP;
2388 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
2389 memcpy(iwe.u.ap_addr.sa_data, sta->addr, ETH_ALEN);
2390 iwe.len = IW_EV_ADDR_LEN;
2391 current_ev = iwe_stream_add_event(info, current_ev, end_buf,
2392 &iwe, IW_EV_ADDR_LEN);
2393
2394 /* Use the mode to indicate if it's a station or
2395 * an Access Point */
2396 memset(&iwe, 0, sizeof(iwe));
2397 iwe.cmd = SIOCGIWMODE;
2398 if (sta->ap)
2399 iwe.u.mode = IW_MODE_MASTER;
2400 else
2401 iwe.u.mode = IW_MODE_INFRA;
2402 iwe.len = IW_EV_UINT_LEN;
2403 current_ev = iwe_stream_add_event(info, current_ev, end_buf,
2404 &iwe, IW_EV_UINT_LEN);
2405
2406 /* Some quality */
2407 memset(&iwe, 0, sizeof(iwe));
2408 iwe.cmd = IWEVQUAL;
2409 if (sta->last_rx_silence == 0)
2410 iwe.u.qual.qual = sta->last_rx_signal < 27 ?
2411 0 : (sta->last_rx_signal - 27) * 92 / 127;
2412 else
2413 iwe.u.qual.qual = sta->last_rx_signal -
2414 sta->last_rx_silence - 35;
2415 iwe.u.qual.level = HFA384X_LEVEL_TO_dBm(sta->last_rx_signal);
2416 iwe.u.qual.noise = HFA384X_LEVEL_TO_dBm(sta->last_rx_silence);
2417 iwe.u.qual.updated = sta->last_rx_updated;
2418 iwe.len = IW_EV_QUAL_LEN;
2419 current_ev = iwe_stream_add_event(info, current_ev, end_buf,
2420 &iwe, IW_EV_QUAL_LEN);
2421
2422 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2423 if (sta->ap) {
2424 memset(&iwe, 0, sizeof(iwe));
2425 iwe.cmd = SIOCGIWESSID;
2426 iwe.u.data.length = sta->u.ap.ssid_len;
2427 iwe.u.data.flags = 1;
2428 current_ev = iwe_stream_add_point(info, current_ev,
2429 end_buf, &iwe,
2430 sta->u.ap.ssid);
2431
2432 memset(&iwe, 0, sizeof(iwe));
2433 iwe.cmd = SIOCGIWENCODE;
2434 if (sta->capability & WLAN_CAPABILITY_PRIVACY)
2435 iwe.u.data.flags =
2436 IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
2437 else
2438 iwe.u.data.flags = IW_ENCODE_DISABLED;
2439 current_ev = iwe_stream_add_point(info, current_ev,
2440 end_buf, &iwe,
2441 sta->u.ap.ssid);
2442
2443 if (sta->u.ap.channel > 0 &&
2444 sta->u.ap.channel <= FREQ_COUNT) {
2445 memset(&iwe, 0, sizeof(iwe));
2446 iwe.cmd = SIOCGIWFREQ;
2447 iwe.u.freq.m = freq_list[sta->u.ap.channel - 1]
2448 * 100000;
2449 iwe.u.freq.e = 1;
2450 current_ev = iwe_stream_add_event(
2451 info, current_ev, end_buf, &iwe,
2452 IW_EV_FREQ_LEN);
2453 }
2454
2455 memset(&iwe, 0, sizeof(iwe));
2456 iwe.cmd = IWEVCUSTOM;
2457 sprintf(buf, "beacon_interval=%d",
2458 sta->listen_interval);
2459 iwe.u.data.length = strlen(buf);
2460 current_ev = iwe_stream_add_point(info, current_ev,
2461 end_buf, &iwe, buf);
2462 }
2463 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2464
2465 sta->last_rx_updated = IW_QUAL_DBM;
2466
2467 /* To be continued, we should make good use of IWEVCUSTOM */
2468 }
2469
2470 spin_unlock_bh(&ap->sta_table_lock);
2471
2472 return current_ev - buffer;
2473 }
2474
2475
2476 static int prism2_hostapd_add_sta(struct ap_data *ap,
2477 struct prism2_hostapd_param *param)
2478 {
2479 struct sta_info *sta;
2480
2481 spin_lock_bh(&ap->sta_table_lock);
2482 sta = ap_get_sta(ap, param->sta_addr);
2483 if (sta)
2484 atomic_inc(&sta->users);
2485 spin_unlock_bh(&ap->sta_table_lock);
2486
2487 if (sta == NULL) {
2488 sta = ap_add_sta(ap, param->sta_addr);
2489 if (sta == NULL)
2490 return -1;
2491 }
2492
2493 if (!(sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
2494 hostap_event_new_sta(sta->local->dev, sta);
2495
2496 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC;
2497 sta->last_rx = jiffies;
2498 sta->aid = param->u.add_sta.aid;
2499 sta->capability = param->u.add_sta.capability;
2500 sta->tx_supp_rates = param->u.add_sta.tx_supp_rates;
2501 if (sta->tx_supp_rates & WLAN_RATE_1M)
2502 sta->supported_rates[0] = 2;
2503 if (sta->tx_supp_rates & WLAN_RATE_2M)
2504 sta->supported_rates[1] = 4;
2505 if (sta->tx_supp_rates & WLAN_RATE_5M5)
2506 sta->supported_rates[2] = 11;
2507 if (sta->tx_supp_rates & WLAN_RATE_11M)
2508 sta->supported_rates[3] = 22;
2509 prism2_check_tx_rates(sta);
2510 atomic_dec(&sta->users);
2511 return 0;
2512 }
2513
2514
2515 static int prism2_hostapd_remove_sta(struct ap_data *ap,
2516 struct prism2_hostapd_param *param)
2517 {
2518 struct sta_info *sta;
2519
2520 spin_lock_bh(&ap->sta_table_lock);
2521 sta = ap_get_sta(ap, param->sta_addr);
2522 if (sta) {
2523 ap_sta_hash_del(ap, sta);
2524 list_del(&sta->list);
2525 }
2526 spin_unlock_bh(&ap->sta_table_lock);
2527
2528 if (!sta)
2529 return -ENOENT;
2530
2531 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
2532 hostap_event_expired_sta(sta->local->dev, sta);
2533 ap_free_sta(ap, sta);
2534
2535 return 0;
2536 }
2537
2538
2539 static int prism2_hostapd_get_info_sta(struct ap_data *ap,
2540 struct prism2_hostapd_param *param)
2541 {
2542 struct sta_info *sta;
2543
2544 spin_lock_bh(&ap->sta_table_lock);
2545 sta = ap_get_sta(ap, param->sta_addr);
2546 if (sta)
2547 atomic_inc(&sta->users);
2548 spin_unlock_bh(&ap->sta_table_lock);
2549
2550 if (!sta)
2551 return -ENOENT;
2552
2553 param->u.get_info_sta.inactive_sec = (jiffies - sta->last_rx) / HZ;
2554
2555 atomic_dec(&sta->users);
2556
2557 return 1;
2558 }
2559
2560
2561 static int prism2_hostapd_set_flags_sta(struct ap_data *ap,
2562 struct prism2_hostapd_param *param)
2563 {
2564 struct sta_info *sta;
2565
2566 spin_lock_bh(&ap->sta_table_lock);
2567 sta = ap_get_sta(ap, param->sta_addr);
2568 if (sta) {
2569 sta->flags |= param->u.set_flags_sta.flags_or;
2570 sta->flags &= param->u.set_flags_sta.flags_and;
2571 }
2572 spin_unlock_bh(&ap->sta_table_lock);
2573
2574 if (!sta)
2575 return -ENOENT;
2576
2577 return 0;
2578 }
2579
2580
2581 static int prism2_hostapd_sta_clear_stats(struct ap_data *ap,
2582 struct prism2_hostapd_param *param)
2583 {
2584 struct sta_info *sta;
2585 int rate;
2586
2587 spin_lock_bh(&ap->sta_table_lock);
2588 sta = ap_get_sta(ap, param->sta_addr);
2589 if (sta) {
2590 sta->rx_packets = sta->tx_packets = 0;
2591 sta->rx_bytes = sta->tx_bytes = 0;
2592 for (rate = 0; rate < WLAN_RATE_COUNT; rate++) {
2593 sta->tx_count[rate] = 0;
2594 sta->rx_count[rate] = 0;
2595 }
2596 }
2597 spin_unlock_bh(&ap->sta_table_lock);
2598
2599 if (!sta)
2600 return -ENOENT;
2601
2602 return 0;
2603 }
2604
2605
2606 int prism2_hostapd(struct ap_data *ap, struct prism2_hostapd_param *param)
2607 {
2608 switch (param->cmd) {
2609 case PRISM2_HOSTAPD_FLUSH:
2610 ap_control_kickall(ap);
2611 return 0;
2612 case PRISM2_HOSTAPD_ADD_STA:
2613 return prism2_hostapd_add_sta(ap, param);
2614 case PRISM2_HOSTAPD_REMOVE_STA:
2615 return prism2_hostapd_remove_sta(ap, param);
2616 case PRISM2_HOSTAPD_GET_INFO_STA:
2617 return prism2_hostapd_get_info_sta(ap, param);
2618 case PRISM2_HOSTAPD_SET_FLAGS_STA:
2619 return prism2_hostapd_set_flags_sta(ap, param);
2620 case PRISM2_HOSTAPD_STA_CLEAR_STATS:
2621 return prism2_hostapd_sta_clear_stats(ap, param);
2622 default:
2623 printk(KERN_WARNING "prism2_hostapd: unknown cmd=%d\n",
2624 param->cmd);
2625 return -EOPNOTSUPP;
2626 }
2627 }
2628
2629
2630 /* Update station info for host-based TX rate control and return current
2631 * TX rate */
2632 static int ap_update_sta_tx_rate(struct sta_info *sta, struct net_device *dev)
2633 {
2634 int ret = sta->tx_rate;
2635 struct hostap_interface *iface;
2636 local_info_t *local;
2637
2638 iface = netdev_priv(dev);
2639 local = iface->local;
2640
2641 sta->tx_count[sta->tx_rate_idx]++;
2642 sta->tx_since_last_failure++;
2643 sta->tx_consecutive_exc = 0;
2644 if (sta->tx_since_last_failure >= WLAN_RATE_UPDATE_COUNT &&
2645 sta->tx_rate_idx < sta->tx_max_rate) {
2646 /* use next higher rate */
2647 int old_rate, new_rate;
2648 old_rate = new_rate = sta->tx_rate_idx;
2649 while (new_rate < sta->tx_max_rate) {
2650 new_rate++;
2651 if (ap_tx_rate_ok(new_rate, sta, local)) {
2652 sta->tx_rate_idx = new_rate;
2653 break;
2654 }
2655 }
2656 if (old_rate != sta->tx_rate_idx) {
2657 switch (sta->tx_rate_idx) {
2658 case 0: sta->tx_rate = 10; break;
2659 case 1: sta->tx_rate = 20; break;
2660 case 2: sta->tx_rate = 55; break;
2661 case 3: sta->tx_rate = 110; break;
2662 default: sta->tx_rate = 0; break;
2663 }
2664 PDEBUG(DEBUG_AP, "%s: STA %pM TX rate raised to %d\n",
2665 dev->name, sta->addr, sta->tx_rate);
2666 }
2667 sta->tx_since_last_failure = 0;
2668 }
2669
2670 return ret;
2671 }
2672
2673
2674 /* Called only from software IRQ. Called for each TX frame prior possible
2675 * encryption and transmit. */
2676 ap_tx_ret hostap_handle_sta_tx(local_info_t *local, struct hostap_tx_data *tx)
2677 {
2678 struct sta_info *sta = NULL;
2679 struct sk_buff *skb = tx->skb;
2680 int set_tim, ret;
2681 struct ieee80211_hdr *hdr;
2682 struct hostap_skb_tx_data *meta;
2683
2684 meta = (struct hostap_skb_tx_data *) skb->cb;
2685 ret = AP_TX_CONTINUE;
2686 if (local->ap == NULL || skb->len < 10 ||
2687 meta->iface->type == HOSTAP_INTERFACE_STA)
2688 goto out;
2689
2690 hdr = (struct ieee80211_hdr *) skb->data;
2691
2692 if (hdr->addr1[0] & 0x01) {
2693 /* broadcast/multicast frame - no AP related processing */
2694 if (local->ap->num_sta <= 0)
2695 ret = AP_TX_DROP;
2696 goto out;
2697 }
2698
2699 /* unicast packet - check whether destination STA is associated */
2700 spin_lock(&local->ap->sta_table_lock);
2701 sta = ap_get_sta(local->ap, hdr->addr1);
2702 if (sta)
2703 atomic_inc(&sta->users);
2704 spin_unlock(&local->ap->sta_table_lock);
2705
2706 if (local->iw_mode == IW_MODE_MASTER && sta == NULL &&
2707 !(meta->flags & HOSTAP_TX_FLAGS_WDS) &&
2708 meta->iface->type != HOSTAP_INTERFACE_MASTER &&
2709 meta->iface->type != HOSTAP_INTERFACE_AP) {
2710 #if 0
2711 /* This can happen, e.g., when wlan0 is added to a bridge and
2712 * bridging code does not know which port is the correct target
2713 * for a unicast frame. In this case, the packet is send to all
2714 * ports of the bridge. Since this is a valid scenario, do not
2715 * print out any errors here. */
2716 if (net_ratelimit()) {
2717 printk(KERN_DEBUG "AP: drop packet to non-associated "
2718 "STA %pM\n", hdr->addr1);
2719 }
2720 #endif
2721 local->ap->tx_drop_nonassoc++;
2722 ret = AP_TX_DROP;
2723 goto out;
2724 }
2725
2726 if (sta == NULL)
2727 goto out;
2728
2729 if (!(sta->flags & WLAN_STA_AUTHORIZED))
2730 ret = AP_TX_CONTINUE_NOT_AUTHORIZED;
2731
2732 /* Set tx_rate if using host-based TX rate control */
2733 if (!local->fw_tx_rate_control)
2734 local->ap->last_tx_rate = meta->rate =
2735 ap_update_sta_tx_rate(sta, local->dev);
2736
2737 if (local->iw_mode != IW_MODE_MASTER)
2738 goto out;
2739
2740 if (!(sta->flags & WLAN_STA_PS))
2741 goto out;
2742
2743 if (meta->flags & HOSTAP_TX_FLAGS_ADD_MOREDATA) {
2744 /* indicate to STA that more frames follow */
2745 hdr->frame_control |=
2746 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
2747 }
2748
2749 if (meta->flags & HOSTAP_TX_FLAGS_BUFFERED_FRAME) {
2750 /* packet was already buffered and now send due to
2751 * PS poll, so do not rebuffer it */
2752 goto out;
2753 }
2754
2755 if (skb_queue_len(&sta->tx_buf) >= STA_MAX_TX_BUFFER) {
2756 PDEBUG(DEBUG_PS, "%s: No more space in STA (%pM)'s"
2757 "PS mode buffer\n",
2758 local->dev->name, sta->addr);
2759 /* Make sure that TIM is set for the station (it might not be
2760 * after AP wlan hw reset). */
2761 /* FIX: should fix hw reset to restore bits based on STA
2762 * buffer state.. */
2763 hostap_set_tim(local, sta->aid, 1);
2764 sta->flags |= WLAN_STA_TIM;
2765 ret = AP_TX_DROP;
2766 goto out;
2767 }
2768
2769 /* STA in PS mode, buffer frame for later delivery */
2770 set_tim = skb_queue_empty(&sta->tx_buf);
2771 skb_queue_tail(&sta->tx_buf, skb);
2772 /* FIX: could save RX time to skb and expire buffered frames after
2773 * some time if STA does not poll for them */
2774
2775 if (set_tim) {
2776 if (sta->flags & WLAN_STA_TIM)
2777 PDEBUG(DEBUG_PS2, "Re-setting TIM for aid %d\n",
2778 sta->aid);
2779 hostap_set_tim(local, sta->aid, 1);
2780 sta->flags |= WLAN_STA_TIM;
2781 }
2782
2783 ret = AP_TX_BUFFERED;
2784
2785 out:
2786 if (sta != NULL) {
2787 if (ret == AP_TX_CONTINUE ||
2788 ret == AP_TX_CONTINUE_NOT_AUTHORIZED) {
2789 sta->tx_packets++;
2790 sta->tx_bytes += skb->len;
2791 sta->last_tx = jiffies;
2792 }
2793
2794 if ((ret == AP_TX_CONTINUE ||
2795 ret == AP_TX_CONTINUE_NOT_AUTHORIZED) &&
2796 sta->crypt && tx->host_encrypt) {
2797 tx->crypt = sta->crypt;
2798 tx->sta_ptr = sta; /* hostap_handle_sta_release() will
2799 * be called to release sta info
2800 * later */
2801 } else
2802 atomic_dec(&sta->users);
2803 }
2804
2805 return ret;
2806 }
2807
2808
2809 void hostap_handle_sta_release(void *ptr)
2810 {
2811 struct sta_info *sta = ptr;
2812 atomic_dec(&sta->users);
2813 }
2814
2815
2816 /* Called only as a tasklet (software IRQ) */
2817 void hostap_handle_sta_tx_exc(local_info_t *local, struct sk_buff *skb)
2818 {
2819 struct sta_info *sta;
2820 struct ieee80211_hdr *hdr;
2821 struct hostap_skb_tx_data *meta;
2822
2823 hdr = (struct ieee80211_hdr *) skb->data;
2824 meta = (struct hostap_skb_tx_data *) skb->cb;
2825
2826 spin_lock(&local->ap->sta_table_lock);
2827 sta = ap_get_sta(local->ap, hdr->addr1);
2828 if (!sta) {
2829 spin_unlock(&local->ap->sta_table_lock);
2830 PDEBUG(DEBUG_AP, "%s: Could not find STA %pM"
2831 " for this TX error (@%lu)\n",
2832 local->dev->name, hdr->addr1, jiffies);
2833 return;
2834 }
2835
2836 sta->tx_since_last_failure = 0;
2837 sta->tx_consecutive_exc++;
2838
2839 if (sta->tx_consecutive_exc >= WLAN_RATE_DECREASE_THRESHOLD &&
2840 sta->tx_rate_idx > 0 && meta->rate <= sta->tx_rate) {
2841 /* use next lower rate */
2842 int old, rate;
2843 old = rate = sta->tx_rate_idx;
2844 while (rate > 0) {
2845 rate--;
2846 if (ap_tx_rate_ok(rate, sta, local)) {
2847 sta->tx_rate_idx = rate;
2848 break;
2849 }
2850 }
2851 if (old != sta->tx_rate_idx) {
2852 switch (sta->tx_rate_idx) {
2853 case 0: sta->tx_rate = 10; break;
2854 case 1: sta->tx_rate = 20; break;
2855 case 2: sta->tx_rate = 55; break;
2856 case 3: sta->tx_rate = 110; break;
2857 default: sta->tx_rate = 0; break;
2858 }
2859 PDEBUG(DEBUG_AP,
2860 "%s: STA %pM TX rate lowered to %d\n",
2861 local->dev->name, sta->addr, sta->tx_rate);
2862 }
2863 sta->tx_consecutive_exc = 0;
2864 }
2865 spin_unlock(&local->ap->sta_table_lock);
2866 }
2867
2868
2869 static void hostap_update_sta_ps2(local_info_t *local, struct sta_info *sta,
2870 int pwrmgt, int type, int stype)
2871 {
2872 if (pwrmgt && !(sta->flags & WLAN_STA_PS)) {
2873 sta->flags |= WLAN_STA_PS;
2874 PDEBUG(DEBUG_PS2, "STA %pM changed to use PS "
2875 "mode (type=0x%02X, stype=0x%02X)\n",
2876 sta->addr, type >> 2, stype >> 4);
2877 } else if (!pwrmgt && (sta->flags & WLAN_STA_PS)) {
2878 sta->flags &= ~WLAN_STA_PS;
2879 PDEBUG(DEBUG_PS2, "STA %pM changed to not use "
2880 "PS mode (type=0x%02X, stype=0x%02X)\n",
2881 sta->addr, type >> 2, stype >> 4);
2882 if (type != IEEE80211_FTYPE_CTL ||
2883 stype != IEEE80211_STYPE_PSPOLL)
2884 schedule_packet_send(local, sta);
2885 }
2886 }
2887
2888
2889 /* Called only as a tasklet (software IRQ). Called for each RX frame to update
2890 * STA power saving state. pwrmgt is a flag from 802.11 frame_control field. */
2891 int hostap_update_sta_ps(local_info_t *local, struct ieee80211_hdr *hdr)
2892 {
2893 struct sta_info *sta;
2894 u16 fc;
2895
2896 spin_lock(&local->ap->sta_table_lock);
2897 sta = ap_get_sta(local->ap, hdr->addr2);
2898 if (sta)
2899 atomic_inc(&sta->users);
2900 spin_unlock(&local->ap->sta_table_lock);
2901
2902 if (!sta)
2903 return -1;
2904
2905 fc = le16_to_cpu(hdr->frame_control);
2906 hostap_update_sta_ps2(local, sta, fc & IEEE80211_FCTL_PM,
2907 fc & IEEE80211_FCTL_FTYPE,
2908 fc & IEEE80211_FCTL_STYPE);
2909
2910 atomic_dec(&sta->users);
2911 return 0;
2912 }
2913
2914
2915 /* Called only as a tasklet (software IRQ). Called for each RX frame after
2916 * getting RX header and payload from hardware. */
2917 ap_rx_ret hostap_handle_sta_rx(local_info_t *local, struct net_device *dev,
2918 struct sk_buff *skb,
2919 struct hostap_80211_rx_status *rx_stats,
2920 int wds)
2921 {
2922 int ret;
2923 struct sta_info *sta;
2924 u16 fc, type, stype;
2925 struct ieee80211_hdr *hdr;
2926
2927 if (local->ap == NULL)
2928 return AP_RX_CONTINUE;
2929
2930 hdr = (struct ieee80211_hdr *) skb->data;
2931
2932 fc = le16_to_cpu(hdr->frame_control);
2933 type = fc & IEEE80211_FCTL_FTYPE;
2934 stype = fc & IEEE80211_FCTL_STYPE;
2935
2936 spin_lock(&local->ap->sta_table_lock);
2937 sta = ap_get_sta(local->ap, hdr->addr2);
2938 if (sta)
2939 atomic_inc(&sta->users);
2940 spin_unlock(&local->ap->sta_table_lock);
2941
2942 if (sta && !(sta->flags & WLAN_STA_AUTHORIZED))
2943 ret = AP_RX_CONTINUE_NOT_AUTHORIZED;
2944 else
2945 ret = AP_RX_CONTINUE;
2946
2947
2948 if (fc & IEEE80211_FCTL_TODS) {
2949 if (!wds && (sta == NULL || !(sta->flags & WLAN_STA_ASSOC))) {
2950 if (local->hostapd) {
2951 prism2_rx_80211(local->apdev, skb, rx_stats,
2952 PRISM2_RX_NON_ASSOC);
2953 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2954 } else {
2955 printk(KERN_DEBUG "%s: dropped received packet"
2956 " from non-associated STA %pM"
2957 " (type=0x%02x, subtype=0x%02x)\n",
2958 dev->name, hdr->addr2,
2959 type >> 2, stype >> 4);
2960 hostap_rx(dev, skb, rx_stats);
2961 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2962 }
2963 ret = AP_RX_EXIT;
2964 goto out;
2965 }
2966 } else if (fc & IEEE80211_FCTL_FROMDS) {
2967 if (!wds) {
2968 /* FromDS frame - not for us; probably
2969 * broadcast/multicast in another BSS - drop */
2970 if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
2971 printk(KERN_DEBUG "Odd.. FromDS packet "
2972 "received with own BSSID\n");
2973 hostap_dump_rx_80211(dev->name, skb, rx_stats);
2974 }
2975 ret = AP_RX_DROP;
2976 goto out;
2977 }
2978 } else if (stype == IEEE80211_STYPE_NULLFUNC && sta == NULL &&
2979 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
2980
2981 if (local->hostapd) {
2982 prism2_rx_80211(local->apdev, skb, rx_stats,
2983 PRISM2_RX_NON_ASSOC);
2984 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2985 } else {
2986 /* At least Lucent f/w seems to send data::nullfunc
2987 * frames with no ToDS flag when the current AP returns
2988 * after being unavailable for some time. Speed up
2989 * re-association by informing the station about it not
2990 * being associated. */
2991 printk(KERN_DEBUG "%s: rejected received nullfunc frame"
2992 " without ToDS from not associated STA %pM\n",
2993 dev->name, hdr->addr2);
2994 hostap_rx(dev, skb, rx_stats);
2995 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2996 }
2997 ret = AP_RX_EXIT;
2998 goto out;
2999 } else if (stype == IEEE80211_STYPE_NULLFUNC) {
3000 /* At least Lucent cards seem to send periodic nullfunc
3001 * frames with ToDS. Let these through to update SQ
3002 * stats and PS state. Nullfunc frames do not contain
3003 * any data and they will be dropped below. */
3004 } else {
3005 /* If BSSID (Addr3) is foreign, this frame is a normal
3006 * broadcast frame from an IBSS network. Drop it silently.
3007 * If BSSID is own, report the dropping of this frame. */
3008 if (memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
3009 printk(KERN_DEBUG "%s: dropped received packet from %pM"
3010 " with no ToDS flag "
3011 "(type=0x%02x, subtype=0x%02x)\n", dev->name,
3012 hdr->addr2, type >> 2, stype >> 4);
3013 hostap_dump_rx_80211(dev->name, skb, rx_stats);
3014 }
3015 ret = AP_RX_DROP;
3016 goto out;
3017 }
3018
3019 if (sta) {
3020 hostap_update_sta_ps2(local, sta, fc & IEEE80211_FCTL_PM,
3021 type, stype);
3022
3023 sta->rx_packets++;
3024 sta->rx_bytes += skb->len;
3025 sta->last_rx = jiffies;
3026 }
3027
3028 if (local->ap->nullfunc_ack && stype == IEEE80211_STYPE_NULLFUNC &&
3029 fc & IEEE80211_FCTL_TODS) {
3030 if (local->hostapd) {
3031 prism2_rx_80211(local->apdev, skb, rx_stats,
3032 PRISM2_RX_NULLFUNC_ACK);
3033 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
3034 } else {
3035 /* some STA f/w's seem to require control::ACK frame
3036 * for data::nullfunc, but Prism2 f/w 0.8.0 (at least
3037 * from Compaq) does not send this.. Try to generate
3038 * ACK for these frames from the host driver to make
3039 * power saving work with, e.g., Lucent WaveLAN f/w */
3040 hostap_rx(dev, skb, rx_stats);
3041 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
3042 }
3043 ret = AP_RX_EXIT;
3044 goto out;
3045 }
3046
3047 out:
3048 if (sta)
3049 atomic_dec(&sta->users);
3050
3051 return ret;
3052 }
3053
3054
3055 /* Called only as a tasklet (software IRQ) */
3056 int hostap_handle_sta_crypto(local_info_t *local,
3057 struct ieee80211_hdr *hdr,
3058 struct lib80211_crypt_data **crypt,
3059 void **sta_ptr)
3060 {
3061 struct sta_info *sta;
3062
3063 spin_lock(&local->ap->sta_table_lock);
3064 sta = ap_get_sta(local->ap, hdr->addr2);
3065 if (sta)
3066 atomic_inc(&sta->users);
3067 spin_unlock(&local->ap->sta_table_lock);
3068
3069 if (!sta)
3070 return -1;
3071
3072 if (sta->crypt) {
3073 *crypt = sta->crypt;
3074 *sta_ptr = sta;
3075 /* hostap_handle_sta_release() will be called to release STA
3076 * info */
3077 } else
3078 atomic_dec(&sta->users);
3079
3080 return 0;
3081 }
3082
3083
3084 /* Called only as a tasklet (software IRQ) */
3085 int hostap_is_sta_assoc(struct ap_data *ap, u8 *sta_addr)
3086 {
3087 struct sta_info *sta;
3088 int ret = 0;
3089
3090 spin_lock(&ap->sta_table_lock);
3091 sta = ap_get_sta(ap, sta_addr);
3092 if (sta != NULL && (sta->flags & WLAN_STA_ASSOC) && !sta->ap)
3093 ret = 1;
3094 spin_unlock(&ap->sta_table_lock);
3095
3096 return ret;
3097 }
3098
3099
3100 /* Called only as a tasklet (software IRQ) */
3101 int hostap_is_sta_authorized(struct ap_data *ap, u8 *sta_addr)
3102 {
3103 struct sta_info *sta;
3104 int ret = 0;
3105
3106 spin_lock(&ap->sta_table_lock);
3107 sta = ap_get_sta(ap, sta_addr);
3108 if (sta != NULL && (sta->flags & WLAN_STA_ASSOC) && !sta->ap &&
3109 ((sta->flags & WLAN_STA_AUTHORIZED) ||
3110 ap->local->ieee_802_1x == 0))
3111 ret = 1;
3112 spin_unlock(&ap->sta_table_lock);
3113
3114 return ret;
3115 }
3116
3117
3118 /* Called only as a tasklet (software IRQ) */
3119 int hostap_add_sta(struct ap_data *ap, u8 *sta_addr)
3120 {
3121 struct sta_info *sta;
3122 int ret = 1;
3123
3124 if (!ap)
3125 return -1;
3126
3127 spin_lock(&ap->sta_table_lock);
3128 sta = ap_get_sta(ap, sta_addr);
3129 if (sta)
3130 ret = 0;
3131 spin_unlock(&ap->sta_table_lock);
3132
3133 if (ret == 1) {
3134 sta = ap_add_sta(ap, sta_addr);
3135 if (!sta)
3136 return -1;
3137 sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
3138 sta->ap = 1;
3139 memset(sta->supported_rates, 0, sizeof(sta->supported_rates));
3140 /* No way of knowing which rates are supported since we did not
3141 * get supported rates element from beacon/assoc req. Assume
3142 * that remote end supports all 802.11b rates. */
3143 sta->supported_rates[0] = 0x82;
3144 sta->supported_rates[1] = 0x84;
3145 sta->supported_rates[2] = 0x0b;
3146 sta->supported_rates[3] = 0x16;
3147 sta->tx_supp_rates = WLAN_RATE_1M | WLAN_RATE_2M |
3148 WLAN_RATE_5M5 | WLAN_RATE_11M;
3149 sta->tx_rate = 110;
3150 sta->tx_max_rate = sta->tx_rate_idx = 3;
3151 }
3152
3153 return ret;
3154 }
3155
3156
3157 /* Called only as a tasklet (software IRQ) */
3158 int hostap_update_rx_stats(struct ap_data *ap,
3159 struct ieee80211_hdr *hdr,
3160 struct hostap_80211_rx_status *rx_stats)
3161 {
3162 struct sta_info *sta;
3163
3164 if (!ap)
3165 return -1;
3166
3167 spin_lock(&ap->sta_table_lock);
3168 sta = ap_get_sta(ap, hdr->addr2);
3169 if (sta) {
3170 sta->last_rx_silence = rx_stats->noise;
3171 sta->last_rx_signal = rx_stats->signal;
3172 sta->last_rx_rate = rx_stats->rate;
3173 sta->last_rx_updated = IW_QUAL_ALL_UPDATED | IW_QUAL_DBM;
3174 if (rx_stats->rate == 10)
3175 sta->rx_count[0]++;
3176 else if (rx_stats->rate == 20)
3177 sta->rx_count[1]++;
3178 else if (rx_stats->rate == 55)
3179 sta->rx_count[2]++;
3180 else if (rx_stats->rate == 110)
3181 sta->rx_count[3]++;
3182 }
3183 spin_unlock(&ap->sta_table_lock);
3184
3185 return sta ? 0 : -1;
3186 }
3187
3188
3189 void hostap_update_rates(local_info_t *local)
3190 {
3191 struct sta_info *sta;
3192 struct ap_data *ap = local->ap;
3193
3194 if (!ap)
3195 return;
3196
3197 spin_lock_bh(&ap->sta_table_lock);
3198 list_for_each_entry(sta, &ap->sta_list, list) {
3199 prism2_check_tx_rates(sta);
3200 }
3201 spin_unlock_bh(&ap->sta_table_lock);
3202 }
3203
3204
3205 void * ap_crypt_get_ptrs(struct ap_data *ap, u8 *addr, int permanent,
3206 struct lib80211_crypt_data ***crypt)
3207 {
3208 struct sta_info *sta;
3209
3210 spin_lock_bh(&ap->sta_table_lock);
3211 sta = ap_get_sta(ap, addr);
3212 if (sta)
3213 atomic_inc(&sta->users);
3214 spin_unlock_bh(&ap->sta_table_lock);
3215
3216 if (!sta && permanent)
3217 sta = ap_add_sta(ap, addr);
3218
3219 if (!sta)
3220 return NULL;
3221
3222 if (permanent)
3223 sta->flags |= WLAN_STA_PERM;
3224
3225 *crypt = &sta->crypt;
3226
3227 return sta;
3228 }
3229
3230
3231 void hostap_add_wds_links(local_info_t *local)
3232 {
3233 struct ap_data *ap = local->ap;
3234 struct sta_info *sta;
3235
3236 spin_lock_bh(&ap->sta_table_lock);
3237 list_for_each_entry(sta, &ap->sta_list, list) {
3238 if (sta->ap)
3239 hostap_wds_link_oper(local, sta->addr, WDS_ADD);
3240 }
3241 spin_unlock_bh(&ap->sta_table_lock);
3242
3243 schedule_work(&local->ap->wds_oper_queue);
3244 }
3245
3246
3247 void hostap_wds_link_oper(local_info_t *local, u8 *addr, wds_oper_type type)
3248 {
3249 struct wds_oper_data *entry;
3250
3251 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
3252 if (!entry)
3253 return;
3254 memcpy(entry->addr, addr, ETH_ALEN);
3255 entry->type = type;
3256 spin_lock_bh(&local->lock);
3257 entry->next = local->ap->wds_oper_entries;
3258 local->ap->wds_oper_entries = entry;
3259 spin_unlock_bh(&local->lock);
3260
3261 schedule_work(&local->ap->wds_oper_queue);
3262 }
3263
3264
3265 EXPORT_SYMBOL(hostap_init_data);
3266 EXPORT_SYMBOL(hostap_init_ap_proc);
3267 EXPORT_SYMBOL(hostap_free_data);
3268 EXPORT_SYMBOL(hostap_check_sta_fw_version);
3269 EXPORT_SYMBOL(hostap_handle_sta_tx_exc);
3270 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
3271 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */