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Linux 2.6.20.7
[linux/fpc-iii.git] / drivers / net / wireless / hostap / hostap_ap.c
blobefb8cf3bd8ad6c0eaebc789fd2b8caf787d48d88
1 /*
2 * Intersil Prism2 driver with Host AP (software access point) support
3 * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
4 * <jkmaline@cc.hut.fi>
5 * Copyright (c) 2002-2005, Jouni Malinen <jkmaline@cc.hut.fi>
6 *
7 * This file is to be included into hostap.c when S/W AP functionality is
8 * compiled.
9 *
10 * AP: FIX:
11 * - if unicast Class 2 (assoc,reassoc,disassoc) frame received from
12 * unauthenticated STA, send deauth. frame (8802.11: 5.5)
13 * - if unicast Class 3 (data with to/from DS,deauth,pspoll) frame received
14 * from authenticated, but unassoc STA, send disassoc frame (8802.11: 5.5)
15 * - if unicast Class 3 received from unauthenticated STA, send deauth. frame
16 * (8802.11: 5.5)
17 */
18
19 #include <linux/proc_fs.h>
20 #include <linux/delay.h>
21 #include <linux/random.h>
22
23 #include "hostap_wlan.h"
24 #include "hostap.h"
25 #include "hostap_ap.h"
26
27 static int other_ap_policy[MAX_PARM_DEVICES] = { AP_OTHER_AP_SKIP_ALL,
28 DEF_INTS };
29 module_param_array(other_ap_policy, int, NULL, 0444);
30 MODULE_PARM_DESC(other_ap_policy, "Other AP beacon monitoring policy (0-3)");
31
32 static int ap_max_inactivity[MAX_PARM_DEVICES] = { AP_MAX_INACTIVITY_SEC,
33 DEF_INTS };
34 module_param_array(ap_max_inactivity, int, NULL, 0444);
35 MODULE_PARM_DESC(ap_max_inactivity, "AP timeout (in seconds) for station "
36 "inactivity");
37
38 static int ap_bridge_packets[MAX_PARM_DEVICES] = { 1, DEF_INTS };
39 module_param_array(ap_bridge_packets, int, NULL, 0444);
40 MODULE_PARM_DESC(ap_bridge_packets, "Bridge packets directly between "
41 "stations");
42
43 static int autom_ap_wds[MAX_PARM_DEVICES] = { 0, DEF_INTS };
44 module_param_array(autom_ap_wds, int, NULL, 0444);
45 MODULE_PARM_DESC(autom_ap_wds, "Add WDS connections to other APs "
46 "automatically");
47
48
49 static struct sta_info* ap_get_sta(struct ap_data *ap, u8 *sta);
50 static void hostap_event_expired_sta(struct net_device *dev,
51 struct sta_info *sta);
52 static void handle_add_proc_queue(struct work_struct *work);
53
54 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
55 static void handle_wds_oper_queue(struct work_struct *work);
56 static void prism2_send_mgmt(struct net_device *dev,
57 u16 type_subtype, char *body,
58 int body_len, u8 *addr, u16 tx_cb_idx);
59 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
60
61
62 #ifndef PRISM2_NO_PROCFS_DEBUG
63 static int ap_debug_proc_read(char *page, char **start, off_t off,
64 int count, int *eof, void *data)
65 {
66 char *p = page;
67 struct ap_data *ap = (struct ap_data *) data;
68
69 if (off != 0) {
70 *eof = 1;
71 return 0;
72 }
73
74 p += sprintf(p, "BridgedUnicastFrames=%u\n", ap->bridged_unicast);
75 p += sprintf(p, "BridgedMulticastFrames=%u\n", ap->bridged_multicast);
76 p += sprintf(p, "max_inactivity=%u\n", ap->max_inactivity / HZ);
77 p += sprintf(p, "bridge_packets=%u\n", ap->bridge_packets);
78 p += sprintf(p, "nullfunc_ack=%u\n", ap->nullfunc_ack);
79 p += sprintf(p, "autom_ap_wds=%u\n", ap->autom_ap_wds);
80 p += sprintf(p, "auth_algs=%u\n", ap->local->auth_algs);
81 p += sprintf(p, "tx_drop_nonassoc=%u\n", ap->tx_drop_nonassoc);
82
83 return (p - page);
84 }
85 #endif /* PRISM2_NO_PROCFS_DEBUG */
86
87
88 static void ap_sta_hash_add(struct ap_data *ap, struct sta_info *sta)
89 {
90 sta->hnext = ap->sta_hash[STA_HASH(sta->addr)];
91 ap->sta_hash[STA_HASH(sta->addr)] = sta;
92 }
93
94 static void ap_sta_hash_del(struct ap_data *ap, struct sta_info *sta)
95 {
96 struct sta_info *s;
97
98 s = ap->sta_hash[STA_HASH(sta->addr)];
99 if (s == NULL) return;
100 if (memcmp(s->addr, sta->addr, ETH_ALEN) == 0) {
101 ap->sta_hash[STA_HASH(sta->addr)] = s->hnext;
102 return;
103 }
104
105 while (s->hnext != NULL && memcmp(s->hnext->addr, sta->addr, ETH_ALEN)
106 != 0)
107 s = s->hnext;
108 if (s->hnext != NULL)
109 s->hnext = s->hnext->hnext;
110 else
111 printk("AP: could not remove STA " MACSTR " from hash table\n",
112 MAC2STR(sta->addr));
113 }
114
115 static void ap_free_sta(struct ap_data *ap, struct sta_info *sta)
116 {
117 if (sta->ap && sta->local)
118 hostap_event_expired_sta(sta->local->dev, sta);
119
120 if (ap->proc != NULL) {
121 char name[20];
122 sprintf(name, MACSTR, MAC2STR(sta->addr));
123 remove_proc_entry(name, ap->proc);
124 }
125
126 if (sta->crypt) {
127 sta->crypt->ops->deinit(sta->crypt->priv);
128 kfree(sta->crypt);
129 sta->crypt = NULL;
130 }
131
132 skb_queue_purge(&sta->tx_buf);
133
134 ap->num_sta--;
135 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
136 if (sta->aid > 0)
137 ap->sta_aid[sta->aid - 1] = NULL;
138
139 if (!sta->ap && sta->u.sta.challenge)
140 kfree(sta->u.sta.challenge);
141 del_timer(&sta->timer);
142 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
143
144 kfree(sta);
145 }
146
147
148 static void hostap_set_tim(local_info_t *local, int aid, int set)
149 {
150 if (local->func->set_tim)
151 local->func->set_tim(local->dev, aid, set);
152 }
153
154
155 static void hostap_event_new_sta(struct net_device *dev, struct sta_info *sta)
156 {
157 union iwreq_data wrqu;
158 memset(&wrqu, 0, sizeof(wrqu));
159 memcpy(wrqu.addr.sa_data, sta->addr, ETH_ALEN);
160 wrqu.addr.sa_family = ARPHRD_ETHER;
161 wireless_send_event(dev, IWEVREGISTERED, &wrqu, NULL);
162 }
163
164
165 static void hostap_event_expired_sta(struct net_device *dev,
166 struct sta_info *sta)
167 {
168 union iwreq_data wrqu;
169 memset(&wrqu, 0, sizeof(wrqu));
170 memcpy(wrqu.addr.sa_data, sta->addr, ETH_ALEN);
171 wrqu.addr.sa_family = ARPHRD_ETHER;
172 wireless_send_event(dev, IWEVEXPIRED, &wrqu, NULL);
173 }
174
175
176 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
177
178 static void ap_handle_timer(unsigned long data)
179 {
180 struct sta_info *sta = (struct sta_info *) data;
181 local_info_t *local;
182 struct ap_data *ap;
183 unsigned long next_time = 0;
184 int was_assoc;
185
186 if (sta == NULL || sta->local == NULL || sta->local->ap == NULL) {
187 PDEBUG(DEBUG_AP, "ap_handle_timer() called with NULL data\n");
188 return;
189 }
190
191 local = sta->local;
192 ap = local->ap;
193 was_assoc = sta->flags & WLAN_STA_ASSOC;
194
195 if (atomic_read(&sta->users) != 0)
196 next_time = jiffies + HZ;
197 else if ((sta->flags & WLAN_STA_PERM) && !(sta->flags & WLAN_STA_AUTH))
198 next_time = jiffies + ap->max_inactivity;
199
200 if (time_before(jiffies, sta->last_rx + ap->max_inactivity)) {
201 /* station activity detected; reset timeout state */
202 sta->timeout_next = STA_NULLFUNC;
203 next_time = sta->last_rx + ap->max_inactivity;
204 } else if (sta->timeout_next == STA_DISASSOC &&
205 !(sta->flags & WLAN_STA_PENDING_POLL)) {
206 /* STA ACKed data nullfunc frame poll */
207 sta->timeout_next = STA_NULLFUNC;
208 next_time = jiffies + ap->max_inactivity;
209 }
210
211 if (next_time) {
212 sta->timer.expires = next_time;
213 add_timer(&sta->timer);
214 return;
215 }
216
217 if (sta->ap)
218 sta->timeout_next = STA_DEAUTH;
219
220 if (sta->timeout_next == STA_DEAUTH && !(sta->flags & WLAN_STA_PERM)) {
221 spin_lock(&ap->sta_table_lock);
222 ap_sta_hash_del(ap, sta);
223 list_del(&sta->list);
224 spin_unlock(&ap->sta_table_lock);
225 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
226 } else if (sta->timeout_next == STA_DISASSOC)
227 sta->flags &= ~WLAN_STA_ASSOC;
228
229 if (was_assoc && !(sta->flags & WLAN_STA_ASSOC) && !sta->ap)
230 hostap_event_expired_sta(local->dev, sta);
231
232 if (sta->timeout_next == STA_DEAUTH && sta->aid > 0 &&
233 !skb_queue_empty(&sta->tx_buf)) {
234 hostap_set_tim(local, sta->aid, 0);
235 sta->flags &= ~WLAN_STA_TIM;
236 }
237
238 if (sta->ap) {
239 if (ap->autom_ap_wds) {
240 PDEBUG(DEBUG_AP, "%s: removing automatic WDS "
241 "connection to AP " MACSTR "\n",
242 local->dev->name, MAC2STR(sta->addr));
243 hostap_wds_link_oper(local, sta->addr, WDS_DEL);
244 }
245 } else if (sta->timeout_next == STA_NULLFUNC) {
246 /* send data frame to poll STA and check whether this frame
247 * is ACKed */
248 /* FIX: IEEE80211_STYPE_NULLFUNC would be more appropriate, but
249 * it is apparently not retried so TX Exc events are not
250 * received for it */
251 sta->flags |= WLAN_STA_PENDING_POLL;
252 prism2_send_mgmt(local->dev, IEEE80211_FTYPE_DATA |
253 IEEE80211_STYPE_DATA, NULL, 0,
254 sta->addr, ap->tx_callback_poll);
255 } else {
256 int deauth = sta->timeout_next == STA_DEAUTH;
257 u16 resp;
258 PDEBUG(DEBUG_AP, "%s: sending %s info to STA " MACSTR
259 "(last=%lu, jiffies=%lu)\n",
260 local->dev->name,
261 deauth ? "deauthentication" : "disassociation",
262 MAC2STR(sta->addr), sta->last_rx, jiffies);
263
264 resp = cpu_to_le16(deauth ? WLAN_REASON_PREV_AUTH_NOT_VALID :
265 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
266 prism2_send_mgmt(local->dev, IEEE80211_FTYPE_MGMT |
267 (deauth ? IEEE80211_STYPE_DEAUTH :
268 IEEE80211_STYPE_DISASSOC),
269 (char *) &resp, 2, sta->addr, 0);
270 }
271
272 if (sta->timeout_next == STA_DEAUTH) {
273 if (sta->flags & WLAN_STA_PERM) {
274 PDEBUG(DEBUG_AP, "%s: STA " MACSTR " would have been "
275 "removed, but it has 'perm' flag\n",
276 local->dev->name, MAC2STR(sta->addr));
277 } else
278 ap_free_sta(ap, sta);
279 return;
280 }
281
282 if (sta->timeout_next == STA_NULLFUNC) {
283 sta->timeout_next = STA_DISASSOC;
284 sta->timer.expires = jiffies + AP_DISASSOC_DELAY;
285 } else {
286 sta->timeout_next = STA_DEAUTH;
287 sta->timer.expires = jiffies + AP_DEAUTH_DELAY;
288 }
289
290 add_timer(&sta->timer);
291 }
292
293
294 void hostap_deauth_all_stas(struct net_device *dev, struct ap_data *ap,
295 int resend)
296 {
297 u8 addr[ETH_ALEN];
298 u16 resp;
299 int i;
300
301 PDEBUG(DEBUG_AP, "%s: Deauthenticate all stations\n", dev->name);
302 memset(addr, 0xff, ETH_ALEN);
303
304 resp = __constant_cpu_to_le16(WLAN_REASON_PREV_AUTH_NOT_VALID);
305
306 /* deauth message sent; try to resend it few times; the message is
307 * broadcast, so it may be delayed until next DTIM; there is not much
308 * else we can do at this point since the driver is going to be shut
309 * down */
310 for (i = 0; i < 5; i++) {
311 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT |
312 IEEE80211_STYPE_DEAUTH,
313 (char *) &resp, 2, addr, 0);
314
315 if (!resend || ap->num_sta <= 0)
316 return;
317
318 mdelay(50);
319 }
320 }
321
322
323 static int ap_control_proc_read(char *page, char **start, off_t off,
324 int count, int *eof, void *data)
325 {
326 char *p = page;
327 struct ap_data *ap = (struct ap_data *) data;
328 char *policy_txt;
329 struct list_head *ptr;
330 struct mac_entry *entry;
331
332 if (off != 0) {
333 *eof = 1;
334 return 0;
335 }
336
337 switch (ap->mac_restrictions.policy) {
338 case MAC_POLICY_OPEN:
339 policy_txt = "open";
340 break;
341 case MAC_POLICY_ALLOW:
342 policy_txt = "allow";
343 break;
344 case MAC_POLICY_DENY:
345 policy_txt = "deny";
346 break;
347 default:
348 policy_txt = "unknown";
349 break;
350 };
351 p += sprintf(p, "MAC policy: %s\n", policy_txt);
352 p += sprintf(p, "MAC entries: %u\n", ap->mac_restrictions.entries);
353 p += sprintf(p, "MAC list:\n");
354 spin_lock_bh(&ap->mac_restrictions.lock);
355 for (ptr = ap->mac_restrictions.mac_list.next;
356 ptr != &ap->mac_restrictions.mac_list; ptr = ptr->next) {
357 if (p - page > PAGE_SIZE - 80) {
358 p += sprintf(p, "All entries did not fit one page.\n");
359 break;
360 }
361
362 entry = list_entry(ptr, struct mac_entry, list);
363 p += sprintf(p, MACSTR "\n", MAC2STR(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 list_head *ptr;
417 struct mac_entry *entry;
418 int found = 0;
419
420 if (mac_restrictions->policy == MAC_POLICY_OPEN)
421 return 0;
422
423 spin_lock_bh(&mac_restrictions->lock);
424 for (ptr = mac_restrictions->mac_list.next;
425 ptr != &mac_restrictions->mac_list; ptr = ptr->next) {
426 entry = list_entry(ptr, struct mac_entry, list);
427
428 if (memcmp(entry->addr, mac, ETH_ALEN) == 0) {
429 found = 1;
430 break;
431 }
432 }
433 spin_unlock_bh(&mac_restrictions->lock);
434
435 if (mac_restrictions->policy == MAC_POLICY_ALLOW)
436 return !found;
437 else
438 return found;
439 }
440
441
442 void ap_control_flush_macs(struct mac_restrictions *mac_restrictions)
443 {
444 struct list_head *ptr, *n;
445 struct mac_entry *entry;
446
447 if (mac_restrictions->entries == 0)
448 return;
449
450 spin_lock_bh(&mac_restrictions->lock);
451 for (ptr = mac_restrictions->mac_list.next, n = ptr->next;
452 ptr != &mac_restrictions->mac_list;
453 ptr = n, n = ptr->next) {
454 entry = list_entry(ptr, struct mac_entry, list);
455 list_del(ptr);
456 kfree(entry);
457 }
458 mac_restrictions->entries = 0;
459 spin_unlock_bh(&mac_restrictions->lock);
460 }
461
462
463 int ap_control_kick_mac(struct ap_data *ap, struct net_device *dev, u8 *mac)
464 {
465 struct sta_info *sta;
466 u16 resp;
467
468 spin_lock_bh(&ap->sta_table_lock);
469 sta = ap_get_sta(ap, mac);
470 if (sta) {
471 ap_sta_hash_del(ap, sta);
472 list_del(&sta->list);
473 }
474 spin_unlock_bh(&ap->sta_table_lock);
475
476 if (!sta)
477 return -EINVAL;
478
479 resp = cpu_to_le16(WLAN_REASON_PREV_AUTH_NOT_VALID);
480 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_DEAUTH,
481 (char *) &resp, 2, sta->addr, 0);
482
483 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap)
484 hostap_event_expired_sta(dev, sta);
485
486 ap_free_sta(ap, sta);
487
488 return 0;
489 }
490
491 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
492
493
494 void ap_control_kickall(struct ap_data *ap)
495 {
496 struct list_head *ptr, *n;
497 struct sta_info *sta;
498
499 spin_lock_bh(&ap->sta_table_lock);
500 for (ptr = ap->sta_list.next, n = ptr->next; ptr != &ap->sta_list;
501 ptr = n, n = ptr->next) {
502 sta = list_entry(ptr, struct sta_info, list);
503 ap_sta_hash_del(ap, sta);
504 list_del(&sta->list);
505 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
506 hostap_event_expired_sta(sta->local->dev, sta);
507 ap_free_sta(ap, sta);
508 }
509 spin_unlock_bh(&ap->sta_table_lock);
510 }
511
512
513 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
514
515 #define PROC_LIMIT (PAGE_SIZE - 80)
516
517 static int prism2_ap_proc_read(char *page, char **start, off_t off,
518 int count, int *eof, void *data)
519 {
520 char *p = page;
521 struct ap_data *ap = (struct ap_data *) data;
522 struct list_head *ptr;
523 int i;
524
525 if (off > PROC_LIMIT) {
526 *eof = 1;
527 return 0;
528 }
529
530 p += sprintf(p, "# BSSID CHAN SIGNAL NOISE RATE SSID FLAGS\n");
531 spin_lock_bh(&ap->sta_table_lock);
532 for (ptr = ap->sta_list.next; ptr != &ap->sta_list; ptr = ptr->next) {
533 struct sta_info *sta = (struct sta_info *) ptr;
534
535 if (!sta->ap)
536 continue;
537
538 p += sprintf(p, MACSTR " %d %d %d %d '", MAC2STR(sta->addr),
539 sta->u.ap.channel, sta->last_rx_signal,
540 sta->last_rx_silence, sta->last_rx_rate);
541 for (i = 0; i < sta->u.ap.ssid_len; i++)
542 p += sprintf(p, ((sta->u.ap.ssid[i] >= 32 &&
543 sta->u.ap.ssid[i] < 127) ?
544 "%c" : "<%02x>"),
545 sta->u.ap.ssid[i]);
546 p += sprintf(p, "'");
547 if (sta->capability & WLAN_CAPABILITY_ESS)
548 p += sprintf(p, " [ESS]");
549 if (sta->capability & WLAN_CAPABILITY_IBSS)
550 p += sprintf(p, " [IBSS]");
551 if (sta->capability & WLAN_CAPABILITY_PRIVACY)
552 p += sprintf(p, " [WEP]");
553 p += sprintf(p, "\n");
554
555 if ((p - page) > PROC_LIMIT) {
556 printk(KERN_DEBUG "hostap: ap proc did not fit\n");
557 break;
558 }
559 }
560 spin_unlock_bh(&ap->sta_table_lock);
561
562 if ((p - page) <= off) {
563 *eof = 1;
564 return 0;
565 }
566
567 *start = page + off;
568
569 return (p - page - off);
570 }
571 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
572
573
574 void hostap_check_sta_fw_version(struct ap_data *ap, int sta_fw_ver)
575 {
576 if (!ap)
577 return;
578
579 if (sta_fw_ver == PRISM2_FW_VER(0,8,0)) {
580 PDEBUG(DEBUG_AP, "Using data::nullfunc ACK workaround - "
581 "firmware upgrade recommended\n");
582 ap->nullfunc_ack = 1;
583 } else
584 ap->nullfunc_ack = 0;
585
586 if (sta_fw_ver == PRISM2_FW_VER(1,4,2)) {
587 printk(KERN_WARNING "%s: Warning: secondary station firmware "
588 "version 1.4.2 does not seem to work in Host AP mode\n",
589 ap->local->dev->name);
590 }
591 }
592
593
594 /* Called only as a tasklet (software IRQ) */
595 static void hostap_ap_tx_cb(struct sk_buff *skb, int ok, void *data)
596 {
597 struct ap_data *ap = data;
598 u16 fc;
599 struct ieee80211_hdr_4addr *hdr;
600
601 if (!ap->local->hostapd || !ap->local->apdev) {
602 dev_kfree_skb(skb);
603 return;
604 }
605
606 hdr = (struct ieee80211_hdr_4addr *) skb->data;
607 fc = le16_to_cpu(hdr->frame_ctl);
608
609 /* Pass the TX callback frame to the hostapd; use 802.11 header version
610 * 1 to indicate failure (no ACK) and 2 success (frame ACKed) */
611
612 fc &= ~IEEE80211_FCTL_VERS;
613 fc |= ok ? BIT(1) : BIT(0);
614 hdr->frame_ctl = cpu_to_le16(fc);
615
616 skb->dev = ap->local->apdev;
617 skb_pull(skb, hostap_80211_get_hdrlen(fc));
618 skb->pkt_type = PACKET_OTHERHOST;
619 skb->protocol = __constant_htons(ETH_P_802_2);
620 memset(skb->cb, 0, sizeof(skb->cb));
621 netif_rx(skb);
622 }
623
624
625 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
626 /* Called only as a tasklet (software IRQ) */
627 static void hostap_ap_tx_cb_auth(struct sk_buff *skb, int ok, void *data)
628 {
629 struct ap_data *ap = data;
630 struct net_device *dev = ap->local->dev;
631 struct ieee80211_hdr_4addr *hdr;
632 u16 fc, *pos, auth_alg, auth_transaction, status;
633 struct sta_info *sta = NULL;
634 char *txt = NULL;
635
636 if (ap->local->hostapd) {
637 dev_kfree_skb(skb);
638 return;
639 }
640
641 hdr = (struct ieee80211_hdr_4addr *) skb->data;
642 fc = le16_to_cpu(hdr->frame_ctl);
643 if (WLAN_FC_GET_TYPE(fc) != IEEE80211_FTYPE_MGMT ||
644 WLAN_FC_GET_STYPE(fc) != IEEE80211_STYPE_AUTH ||
645 skb->len < IEEE80211_MGMT_HDR_LEN + 6) {
646 printk(KERN_DEBUG "%s: hostap_ap_tx_cb_auth received invalid "
647 "frame\n", dev->name);
648 dev_kfree_skb(skb);
649 return;
650 }
651
652 pos = (u16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
653 auth_alg = le16_to_cpu(*pos++);
654 auth_transaction = le16_to_cpu(*pos++);
655 status = le16_to_cpu(*pos++);
656
657 if (!ok) {
658 txt = "frame was not ACKed";
659 goto done;
660 }
661
662 spin_lock(&ap->sta_table_lock);
663 sta = ap_get_sta(ap, hdr->addr1);
664 if (sta)
665 atomic_inc(&sta->users);
666 spin_unlock(&ap->sta_table_lock);
667
668 if (!sta) {
669 txt = "STA not found";
670 goto done;
671 }
672
673 if (status == WLAN_STATUS_SUCCESS &&
674 ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 2) ||
675 (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 4))) {
676 txt = "STA authenticated";
677 sta->flags |= WLAN_STA_AUTH;
678 sta->last_auth = jiffies;
679 } else if (status != WLAN_STATUS_SUCCESS)
680 txt = "authentication failed";
681
682 done:
683 if (sta)
684 atomic_dec(&sta->users);
685 if (txt) {
686 PDEBUG(DEBUG_AP, "%s: " MACSTR " auth_cb - alg=%d trans#=%d "
687 "status=%d - %s\n",
688 dev->name, MAC2STR(hdr->addr1), auth_alg,
689 auth_transaction, status, txt);
690 }
691 dev_kfree_skb(skb);
692 }
693
694
695 /* Called only as a tasklet (software IRQ) */
696 static void hostap_ap_tx_cb_assoc(struct sk_buff *skb, int ok, void *data)
697 {
698 struct ap_data *ap = data;
699 struct net_device *dev = ap->local->dev;
700 struct ieee80211_hdr_4addr *hdr;
701 u16 fc, *pos, status;
702 struct sta_info *sta = NULL;
703 char *txt = NULL;
704
705 if (ap->local->hostapd) {
706 dev_kfree_skb(skb);
707 return;
708 }
709
710 hdr = (struct ieee80211_hdr_4addr *) skb->data;
711 fc = le16_to_cpu(hdr->frame_ctl);
712 if (WLAN_FC_GET_TYPE(fc) != IEEE80211_FTYPE_MGMT ||
713 (WLAN_FC_GET_STYPE(fc) != IEEE80211_STYPE_ASSOC_RESP &&
714 WLAN_FC_GET_STYPE(fc) != IEEE80211_STYPE_REASSOC_RESP) ||
715 skb->len < IEEE80211_MGMT_HDR_LEN + 4) {
716 printk(KERN_DEBUG "%s: hostap_ap_tx_cb_assoc received invalid "
717 "frame\n", dev->name);
718 dev_kfree_skb(skb);
719 return;
720 }
721
722 if (!ok) {
723 txt = "frame was not ACKed";
724 goto done;
725 }
726
727 spin_lock(&ap->sta_table_lock);
728 sta = ap_get_sta(ap, hdr->addr1);
729 if (sta)
730 atomic_inc(&sta->users);
731 spin_unlock(&ap->sta_table_lock);
732
733 if (!sta) {
734 txt = "STA not found";
735 goto done;
736 }
737
738 pos = (u16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
739 pos++;
740 status = le16_to_cpu(*pos++);
741 if (status == WLAN_STATUS_SUCCESS) {
742 if (!(sta->flags & WLAN_STA_ASSOC))
743 hostap_event_new_sta(dev, sta);
744 txt = "STA associated";
745 sta->flags |= WLAN_STA_ASSOC;
746 sta->last_assoc = jiffies;
747 } else
748 txt = "association failed";
749
750 done:
751 if (sta)
752 atomic_dec(&sta->users);
753 if (txt) {
754 PDEBUG(DEBUG_AP, "%s: " MACSTR " assoc_cb - %s\n",
755 dev->name, MAC2STR(hdr->addr1), txt);
756 }
757 dev_kfree_skb(skb);
758 }
759
760 /* Called only as a tasklet (software IRQ); TX callback for poll frames used
761 * in verifying whether the STA is still present. */
762 static void hostap_ap_tx_cb_poll(struct sk_buff *skb, int ok, void *data)
763 {
764 struct ap_data *ap = data;
765 struct ieee80211_hdr_4addr *hdr;
766 struct sta_info *sta;
767
768 if (skb->len < 24)
769 goto fail;
770 hdr = (struct ieee80211_hdr_4addr *) skb->data;
771 if (ok) {
772 spin_lock(&ap->sta_table_lock);
773 sta = ap_get_sta(ap, hdr->addr1);
774 if (sta)
775 sta->flags &= ~WLAN_STA_PENDING_POLL;
776 spin_unlock(&ap->sta_table_lock);
777 } else {
778 PDEBUG(DEBUG_AP, "%s: STA " MACSTR " did not ACK activity "
779 "poll frame\n", ap->local->dev->name,
780 MAC2STR(hdr->addr1));
781 }
782
783 fail:
784 dev_kfree_skb(skb);
785 }
786 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
787
788
789 void hostap_init_data(local_info_t *local)
790 {
791 struct ap_data *ap = local->ap;
792
793 if (ap == NULL) {
794 printk(KERN_WARNING "hostap_init_data: ap == NULL\n");
795 return;
796 }
797 memset(ap, 0, sizeof(struct ap_data));
798 ap->local = local;
799
800 ap->ap_policy = GET_INT_PARM(other_ap_policy, local->card_idx);
801 ap->bridge_packets = GET_INT_PARM(ap_bridge_packets, local->card_idx);
802 ap->max_inactivity =
803 GET_INT_PARM(ap_max_inactivity, local->card_idx) * HZ;
804 ap->autom_ap_wds = GET_INT_PARM(autom_ap_wds, local->card_idx);
805
806 spin_lock_init(&ap->sta_table_lock);
807 INIT_LIST_HEAD(&ap->sta_list);
808
809 /* Initialize task queue structure for AP management */
810 INIT_WORK(&local->ap->add_sta_proc_queue, handle_add_proc_queue);
811
812 ap->tx_callback_idx =
813 hostap_tx_callback_register(local, hostap_ap_tx_cb, ap);
814 if (ap->tx_callback_idx == 0)
815 printk(KERN_WARNING "%s: failed to register TX callback for "
816 "AP\n", local->dev->name);
817 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
818 INIT_WORK(&local->ap->wds_oper_queue, handle_wds_oper_queue);
819
820 ap->tx_callback_auth =
821 hostap_tx_callback_register(local, hostap_ap_tx_cb_auth, ap);
822 ap->tx_callback_assoc =
823 hostap_tx_callback_register(local, hostap_ap_tx_cb_assoc, ap);
824 ap->tx_callback_poll =
825 hostap_tx_callback_register(local, hostap_ap_tx_cb_poll, ap);
826 if (ap->tx_callback_auth == 0 || ap->tx_callback_assoc == 0 ||
827 ap->tx_callback_poll == 0)
828 printk(KERN_WARNING "%s: failed to register TX callback for "
829 "AP\n", local->dev->name);
830
831 spin_lock_init(&ap->mac_restrictions.lock);
832 INIT_LIST_HEAD(&ap->mac_restrictions.mac_list);
833 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
834
835 ap->initialized = 1;
836 }
837
838
839 void hostap_init_ap_proc(local_info_t *local)
840 {
841 struct ap_data *ap = local->ap;
842
843 ap->proc = local->proc;
844 if (ap->proc == NULL)
845 return;
846
847 #ifndef PRISM2_NO_PROCFS_DEBUG
848 create_proc_read_entry("ap_debug", 0, ap->proc,
849 ap_debug_proc_read, ap);
850 #endif /* PRISM2_NO_PROCFS_DEBUG */
851
852 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
853 create_proc_read_entry("ap_control", 0, ap->proc,
854 ap_control_proc_read, ap);
855 create_proc_read_entry("ap", 0, ap->proc,
856 prism2_ap_proc_read, ap);
857 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
858
859 }
860
861
862 void hostap_free_data(struct ap_data *ap)
863 {
864 struct list_head *n, *ptr;
865
866 if (ap == NULL || !ap->initialized) {
867 printk(KERN_DEBUG "hostap_free_data: ap has not yet been "
868 "initialized - skip resource freeing\n");
869 return;
870 }
871
872 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
873 if (ap->crypt)
874 ap->crypt->deinit(ap->crypt_priv);
875 ap->crypt = ap->crypt_priv = NULL;
876 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
877
878 list_for_each_safe(ptr, n, &ap->sta_list) {
879 struct sta_info *sta = list_entry(ptr, struct sta_info, list);
880 ap_sta_hash_del(ap, sta);
881 list_del(&sta->list);
882 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
883 hostap_event_expired_sta(sta->local->dev, sta);
884 ap_free_sta(ap, sta);
885 }
886
887 #ifndef PRISM2_NO_PROCFS_DEBUG
888 if (ap->proc != NULL) {
889 remove_proc_entry("ap_debug", ap->proc);
890 }
891 #endif /* PRISM2_NO_PROCFS_DEBUG */
892
893 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
894 if (ap->proc != NULL) {
895 remove_proc_entry("ap", ap->proc);
896 remove_proc_entry("ap_control", ap->proc);
897 }
898 ap_control_flush_macs(&ap->mac_restrictions);
899 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
900
901 ap->initialized = 0;
902 }
903
904
905 /* caller should have mutex for AP STA list handling */
906 static struct sta_info* ap_get_sta(struct ap_data *ap, u8 *sta)
907 {
908 struct sta_info *s;
909
910 s = ap->sta_hash[STA_HASH(sta)];
911 while (s != NULL && memcmp(s->addr, sta, ETH_ALEN) != 0)
912 s = s->hnext;
913 return s;
914 }
915
916
917 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
918
919 /* Called from timer handler and from scheduled AP queue handlers */
920 static void prism2_send_mgmt(struct net_device *dev,
921 u16 type_subtype, char *body,
922 int body_len, u8 *addr, u16 tx_cb_idx)
923 {
924 struct hostap_interface *iface;
925 local_info_t *local;
926 struct ieee80211_hdr_4addr *hdr;
927 u16 fc;
928 struct sk_buff *skb;
929 struct hostap_skb_tx_data *meta;
930 int hdrlen;
931
932 iface = netdev_priv(dev);
933 local = iface->local;
934 dev = local->dev; /* always use master radio device */
935 iface = netdev_priv(dev);
936
937 if (!(dev->flags & IFF_UP)) {
938 PDEBUG(DEBUG_AP, "%s: prism2_send_mgmt - device is not UP - "
939 "cannot send frame\n", dev->name);
940 return;
941 }
942
943 skb = dev_alloc_skb(sizeof(*hdr) + body_len);
944 if (skb == NULL) {
945 PDEBUG(DEBUG_AP, "%s: prism2_send_mgmt failed to allocate "
946 "skb\n", dev->name);
947 return;
948 }
949
950 fc = type_subtype;
951 hdrlen = hostap_80211_get_hdrlen(fc);
952 hdr = (struct ieee80211_hdr_4addr *) skb_put(skb, hdrlen);
953 if (body)
954 memcpy(skb_put(skb, body_len), body, body_len);
955
956 memset(hdr, 0, hdrlen);
957
958 /* FIX: ctrl::ack sending used special HFA384X_TX_CTRL_802_11
959 * tx_control instead of using local->tx_control */
960
961
962 memcpy(hdr->addr1, addr, ETH_ALEN); /* DA / RA */
963 if (WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_DATA) {
964 fc |= IEEE80211_FCTL_FROMDS;
965 memcpy(hdr->addr2, dev->dev_addr, ETH_ALEN); /* BSSID */
966 memcpy(hdr->addr3, dev->dev_addr, ETH_ALEN); /* SA */
967 } else if (WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_CTL) {
968 /* control:ACK does not have addr2 or addr3 */
969 memset(hdr->addr2, 0, ETH_ALEN);
970 memset(hdr->addr3, 0, ETH_ALEN);
971 } else {
972 memcpy(hdr->addr2, dev->dev_addr, ETH_ALEN); /* SA */
973 memcpy(hdr->addr3, dev->dev_addr, ETH_ALEN); /* BSSID */
974 }
975
976 hdr->frame_ctl = cpu_to_le16(fc);
977
978 meta = (struct hostap_skb_tx_data *) skb->cb;
979 memset(meta, 0, sizeof(*meta));
980 meta->magic = HOSTAP_SKB_TX_DATA_MAGIC;
981 meta->iface = iface;
982 meta->tx_cb_idx = tx_cb_idx;
983
984 skb->dev = dev;
985 skb->mac.raw = skb->nh.raw = skb->data;
986 dev_queue_xmit(skb);
987 }
988 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
989
990
991 static int prism2_sta_proc_read(char *page, char **start, off_t off,
992 int count, int *eof, void *data)
993 {
994 char *p = page;
995 struct sta_info *sta = (struct sta_info *) data;
996 int i;
997
998 /* FIX: possible race condition.. the STA data could have just expired,
999 * but proc entry was still here so that the read could have started;
1000 * some locking should be done here.. */
1001
1002 if (off != 0) {
1003 *eof = 1;
1004 return 0;
1005 }
1006
1007 p += sprintf(p, "%s=" MACSTR "\nusers=%d\naid=%d\n"
1008 "flags=0x%04x%s%s%s%s%s%s%s\n"
1009 "capability=0x%02x\nlisten_interval=%d\nsupported_rates=",
1010 sta->ap ? "AP" : "STA",
1011 MAC2STR(sta->addr), atomic_read(&sta->users), sta->aid,
1012 sta->flags,
1013 sta->flags & WLAN_STA_AUTH ? " AUTH" : "",
1014 sta->flags & WLAN_STA_ASSOC ? " ASSOC" : "",
1015 sta->flags & WLAN_STA_PS ? " PS" : "",
1016 sta->flags & WLAN_STA_TIM ? " TIM" : "",
1017 sta->flags & WLAN_STA_PERM ? " PERM" : "",
1018 sta->flags & WLAN_STA_AUTHORIZED ? " AUTHORIZED" : "",
1019 sta->flags & WLAN_STA_PENDING_POLL ? " POLL" : "",
1020 sta->capability, sta->listen_interval);
1021 /* supported_rates: 500 kbit/s units with msb ignored */
1022 for (i = 0; i < sizeof(sta->supported_rates); i++)
1023 if (sta->supported_rates[i] != 0)
1024 p += sprintf(p, "%d%sMbps ",
1025 (sta->supported_rates[i] & 0x7f) / 2,
1026 sta->supported_rates[i] & 1 ? ".5" : "");
1027 p += sprintf(p, "\njiffies=%lu\nlast_auth=%lu\nlast_assoc=%lu\n"
1028 "last_rx=%lu\nlast_tx=%lu\nrx_packets=%lu\n"
1029 "tx_packets=%lu\n"
1030 "rx_bytes=%lu\ntx_bytes=%lu\nbuffer_count=%d\n"
1031 "last_rx: silence=%d dBm signal=%d dBm rate=%d%s Mbps\n"
1032 "tx_rate=%d\ntx[1M]=%d\ntx[2M]=%d\ntx[5.5M]=%d\n"
1033 "tx[11M]=%d\n"
1034 "rx[1M]=%d\nrx[2M]=%d\nrx[5.5M]=%d\nrx[11M]=%d\n",
1035 jiffies, sta->last_auth, sta->last_assoc, sta->last_rx,
1036 sta->last_tx,
1037 sta->rx_packets, sta->tx_packets, sta->rx_bytes,
1038 sta->tx_bytes, skb_queue_len(&sta->tx_buf),
1039 sta->last_rx_silence,
1040 sta->last_rx_signal, sta->last_rx_rate / 10,
1041 sta->last_rx_rate % 10 ? ".5" : "",
1042 sta->tx_rate, sta->tx_count[0], sta->tx_count[1],
1043 sta->tx_count[2], sta->tx_count[3], sta->rx_count[0],
1044 sta->rx_count[1], sta->rx_count[2], sta->rx_count[3]);
1045 if (sta->crypt && sta->crypt->ops && sta->crypt->ops->print_stats)
1046 p = sta->crypt->ops->print_stats(p, sta->crypt->priv);
1047 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1048 if (sta->ap) {
1049 if (sta->u.ap.channel >= 0)
1050 p += sprintf(p, "channel=%d\n", sta->u.ap.channel);
1051 p += sprintf(p, "ssid=");
1052 for (i = 0; i < sta->u.ap.ssid_len; i++)
1053 p += sprintf(p, ((sta->u.ap.ssid[i] >= 32 &&
1054 sta->u.ap.ssid[i] < 127) ?
1055 "%c" : "<%02x>"),
1056 sta->u.ap.ssid[i]);
1057 p += sprintf(p, "\n");
1058 }
1059 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1060
1061 return (p - page);
1062 }
1063
1064
1065 static void handle_add_proc_queue(struct work_struct *work)
1066 {
1067 struct ap_data *ap = container_of(work, struct ap_data,
1068 add_sta_proc_queue);
1069 struct sta_info *sta;
1070 char name[20];
1071 struct add_sta_proc_data *entry, *prev;
1072
1073 entry = ap->add_sta_proc_entries;
1074 ap->add_sta_proc_entries = NULL;
1075
1076 while (entry) {
1077 spin_lock_bh(&ap->sta_table_lock);
1078 sta = ap_get_sta(ap, entry->addr);
1079 if (sta)
1080 atomic_inc(&sta->users);
1081 spin_unlock_bh(&ap->sta_table_lock);
1082
1083 if (sta) {
1084 sprintf(name, MACSTR, MAC2STR(sta->addr));
1085 sta->proc = create_proc_read_entry(
1086 name, 0, ap->proc,
1087 prism2_sta_proc_read, sta);
1088
1089 atomic_dec(&sta->users);
1090 }
1091
1092 prev = entry;
1093 entry = entry->next;
1094 kfree(prev);
1095 }
1096 }
1097
1098
1099 static struct sta_info * ap_add_sta(struct ap_data *ap, u8 *addr)
1100 {
1101 struct sta_info *sta;
1102
1103 sta = kzalloc(sizeof(struct sta_info), GFP_ATOMIC);
1104 if (sta == NULL) {
1105 PDEBUG(DEBUG_AP, "AP: kmalloc failed\n");
1106 return NULL;
1107 }
1108
1109 /* initialize STA info data */
1110 sta->local = ap->local;
1111 skb_queue_head_init(&sta->tx_buf);
1112 memcpy(sta->addr, addr, ETH_ALEN);
1113
1114 atomic_inc(&sta->users);
1115 spin_lock_bh(&ap->sta_table_lock);
1116 list_add(&sta->list, &ap->sta_list);
1117 ap->num_sta++;
1118 ap_sta_hash_add(ap, sta);
1119 spin_unlock_bh(&ap->sta_table_lock);
1120
1121 if (ap->proc) {
1122 struct add_sta_proc_data *entry;
1123 /* schedule a non-interrupt context process to add a procfs
1124 * entry for the STA since procfs code use GFP_KERNEL */
1125 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
1126 if (entry) {
1127 memcpy(entry->addr, sta->addr, ETH_ALEN);
1128 entry->next = ap->add_sta_proc_entries;
1129 ap->add_sta_proc_entries = entry;
1130 schedule_work(&ap->add_sta_proc_queue);
1131 } else
1132 printk(KERN_DEBUG "Failed to add STA proc data\n");
1133 }
1134
1135 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1136 init_timer(&sta->timer);
1137 sta->timer.expires = jiffies + ap->max_inactivity;
1138 sta->timer.data = (unsigned long) sta;
1139 sta->timer.function = ap_handle_timer;
1140 if (!ap->local->hostapd)
1141 add_timer(&sta->timer);
1142 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1143
1144 return sta;
1145 }
1146
1147
1148 static int ap_tx_rate_ok(int rateidx, struct sta_info *sta,
1149 local_info_t *local)
1150 {
1151 if (rateidx > sta->tx_max_rate ||
1152 !(sta->tx_supp_rates & (1 << rateidx)))
1153 return 0;
1154
1155 if (local->tx_rate_control != 0 &&
1156 !(local->tx_rate_control & (1 << rateidx)))
1157 return 0;
1158
1159 return 1;
1160 }
1161
1162
1163 static void prism2_check_tx_rates(struct sta_info *sta)
1164 {
1165 int i;
1166
1167 sta->tx_supp_rates = 0;
1168 for (i = 0; i < sizeof(sta->supported_rates); i++) {
1169 if ((sta->supported_rates[i] & 0x7f) == 2)
1170 sta->tx_supp_rates |= WLAN_RATE_1M;
1171 if ((sta->supported_rates[i] & 0x7f) == 4)
1172 sta->tx_supp_rates |= WLAN_RATE_2M;
1173 if ((sta->supported_rates[i] & 0x7f) == 11)
1174 sta->tx_supp_rates |= WLAN_RATE_5M5;
1175 if ((sta->supported_rates[i] & 0x7f) == 22)
1176 sta->tx_supp_rates |= WLAN_RATE_11M;
1177 }
1178 sta->tx_max_rate = sta->tx_rate = sta->tx_rate_idx = 0;
1179 if (sta->tx_supp_rates & WLAN_RATE_1M) {
1180 sta->tx_max_rate = 0;
1181 if (ap_tx_rate_ok(0, sta, sta->local)) {
1182 sta->tx_rate = 10;
1183 sta->tx_rate_idx = 0;
1184 }
1185 }
1186 if (sta->tx_supp_rates & WLAN_RATE_2M) {
1187 sta->tx_max_rate = 1;
1188 if (ap_tx_rate_ok(1, sta, sta->local)) {
1189 sta->tx_rate = 20;
1190 sta->tx_rate_idx = 1;
1191 }
1192 }
1193 if (sta->tx_supp_rates & WLAN_RATE_5M5) {
1194 sta->tx_max_rate = 2;
1195 if (ap_tx_rate_ok(2, sta, sta->local)) {
1196 sta->tx_rate = 55;
1197 sta->tx_rate_idx = 2;
1198 }
1199 }
1200 if (sta->tx_supp_rates & WLAN_RATE_11M) {
1201 sta->tx_max_rate = 3;
1202 if (ap_tx_rate_ok(3, sta, sta->local)) {
1203 sta->tx_rate = 110;
1204 sta->tx_rate_idx = 3;
1205 }
1206 }
1207 }
1208
1209
1210 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1211
1212 static void ap_crypt_init(struct ap_data *ap)
1213 {
1214 ap->crypt = ieee80211_get_crypto_ops("WEP");
1215
1216 if (ap->crypt) {
1217 if (ap->crypt->init) {
1218 ap->crypt_priv = ap->crypt->init(0);
1219 if (ap->crypt_priv == NULL)
1220 ap->crypt = NULL;
1221 else {
1222 u8 key[WEP_KEY_LEN];
1223 get_random_bytes(key, WEP_KEY_LEN);
1224 ap->crypt->set_key(key, WEP_KEY_LEN, NULL,
1225 ap->crypt_priv);
1226 }
1227 }
1228 }
1229
1230 if (ap->crypt == NULL) {
1231 printk(KERN_WARNING "AP could not initialize WEP: load module "
1232 "ieee80211_crypt_wep.ko\n");
1233 }
1234 }
1235
1236
1237 /* Generate challenge data for shared key authentication. IEEE 802.11 specifies
1238 * that WEP algorithm is used for generating challange. This should be unique,
1239 * but otherwise there is not really need for randomness etc. Initialize WEP
1240 * with pseudo random key and then use increasing IV to get unique challenge
1241 * streams.
1242 *
1243 * Called only as a scheduled task for pending AP frames.
1244 */
1245 static char * ap_auth_make_challenge(struct ap_data *ap)
1246 {
1247 char *tmpbuf;
1248 struct sk_buff *skb;
1249
1250 if (ap->crypt == NULL) {
1251 ap_crypt_init(ap);
1252 if (ap->crypt == NULL)
1253 return NULL;
1254 }
1255
1256 tmpbuf = kmalloc(WLAN_AUTH_CHALLENGE_LEN, GFP_ATOMIC);
1257 if (tmpbuf == NULL) {
1258 PDEBUG(DEBUG_AP, "AP: kmalloc failed for challenge\n");
1259 return NULL;
1260 }
1261
1262 skb = dev_alloc_skb(WLAN_AUTH_CHALLENGE_LEN +
1263 ap->crypt->extra_mpdu_prefix_len +
1264 ap->crypt->extra_mpdu_postfix_len);
1265 if (skb == NULL) {
1266 kfree(tmpbuf);
1267 return NULL;
1268 }
1269
1270 skb_reserve(skb, ap->crypt->extra_mpdu_prefix_len);
1271 memset(skb_put(skb, WLAN_AUTH_CHALLENGE_LEN), 0,
1272 WLAN_AUTH_CHALLENGE_LEN);
1273 if (ap->crypt->encrypt_mpdu(skb, 0, ap->crypt_priv)) {
1274 dev_kfree_skb(skb);
1275 kfree(tmpbuf);
1276 return NULL;
1277 }
1278
1279 memcpy(tmpbuf, skb->data + ap->crypt->extra_mpdu_prefix_len,
1280 WLAN_AUTH_CHALLENGE_LEN);
1281 dev_kfree_skb(skb);
1282
1283 return tmpbuf;
1284 }
1285
1286
1287 /* Called only as a scheduled task for pending AP frames. */
1288 static void handle_authen(local_info_t *local, struct sk_buff *skb,
1289 struct hostap_80211_rx_status *rx_stats)
1290 {
1291 struct net_device *dev = local->dev;
1292 struct ieee80211_hdr_4addr *hdr = (struct ieee80211_hdr_4addr *) skb->data;
1293 size_t hdrlen;
1294 struct ap_data *ap = local->ap;
1295 char body[8 + WLAN_AUTH_CHALLENGE_LEN], *challenge = NULL;
1296 int len, olen;
1297 u16 auth_alg, auth_transaction, status_code, *pos;
1298 u16 resp = WLAN_STATUS_SUCCESS, fc;
1299 struct sta_info *sta = NULL;
1300 struct ieee80211_crypt_data *crypt;
1301 char *txt = "";
1302
1303 len = skb->len - IEEE80211_MGMT_HDR_LEN;
1304
1305 fc = le16_to_cpu(hdr->frame_ctl);
1306 hdrlen = hostap_80211_get_hdrlen(fc);
1307
1308 if (len < 6) {
1309 PDEBUG(DEBUG_AP, "%s: handle_authen - too short payload "
1310 "(len=%d) from " MACSTR "\n", dev->name, len,
1311 MAC2STR(hdr->addr2));
1312 return;
1313 }
1314
1315 spin_lock_bh(&local->ap->sta_table_lock);
1316 sta = ap_get_sta(local->ap, hdr->addr2);
1317 if (sta)
1318 atomic_inc(&sta->users);
1319 spin_unlock_bh(&local->ap->sta_table_lock);
1320
1321 if (sta && sta->crypt)
1322 crypt = sta->crypt;
1323 else {
1324 int idx = 0;
1325 if (skb->len >= hdrlen + 3)
1326 idx = skb->data[hdrlen + 3] >> 6;
1327 crypt = local->crypt[idx];
1328 }
1329
1330 pos = (u16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
1331 auth_alg = __le16_to_cpu(*pos);
1332 pos++;
1333 auth_transaction = __le16_to_cpu(*pos);
1334 pos++;
1335 status_code = __le16_to_cpu(*pos);
1336 pos++;
1337
1338 if (memcmp(dev->dev_addr, hdr->addr2, ETH_ALEN) == 0 ||
1339 ap_control_mac_deny(&ap->mac_restrictions, hdr->addr2)) {
1340 txt = "authentication denied";
1341 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1342 goto fail;
1343 }
1344
1345 if (((local->auth_algs & PRISM2_AUTH_OPEN) &&
1346 auth_alg == WLAN_AUTH_OPEN) ||
1347 ((local->auth_algs & PRISM2_AUTH_SHARED_KEY) &&
1348 crypt && auth_alg == WLAN_AUTH_SHARED_KEY)) {
1349 } else {
1350 txt = "unsupported algorithm";
1351 resp = WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG;
1352 goto fail;
1353 }
1354
1355 if (len >= 8) {
1356 u8 *u = (u8 *) pos;
1357 if (*u == WLAN_EID_CHALLENGE) {
1358 if (*(u + 1) != WLAN_AUTH_CHALLENGE_LEN) {
1359 txt = "invalid challenge len";
1360 resp = WLAN_STATUS_CHALLENGE_FAIL;
1361 goto fail;
1362 }
1363 if (len - 8 < WLAN_AUTH_CHALLENGE_LEN) {
1364 txt = "challenge underflow";
1365 resp = WLAN_STATUS_CHALLENGE_FAIL;
1366 goto fail;
1367 }
1368 challenge = (char *) (u + 2);
1369 }
1370 }
1371
1372 if (sta && sta->ap) {
1373 if (time_after(jiffies, sta->u.ap.last_beacon +
1374 (10 * sta->listen_interval * HZ) / 1024)) {
1375 PDEBUG(DEBUG_AP, "%s: no beacons received for a while,"
1376 " assuming AP " MACSTR " is now STA\n",
1377 dev->name, MAC2STR(sta->addr));
1378 sta->ap = 0;
1379 sta->flags = 0;
1380 sta->u.sta.challenge = NULL;
1381 } else {
1382 txt = "AP trying to authenticate?";
1383 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1384 goto fail;
1385 }
1386 }
1387
1388 if ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 1) ||
1389 (auth_alg == WLAN_AUTH_SHARED_KEY &&
1390 (auth_transaction == 1 ||
1391 (auth_transaction == 3 && sta != NULL &&
1392 sta->u.sta.challenge != NULL)))) {
1393 } else {
1394 txt = "unknown authentication transaction number";
1395 resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION;
1396 goto fail;
1397 }
1398
1399 if (sta == NULL) {
1400 txt = "new STA";
1401
1402 if (local->ap->num_sta >= MAX_STA_COUNT) {
1403 /* FIX: might try to remove some old STAs first? */
1404 txt = "no more room for new STAs";
1405 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1406 goto fail;
1407 }
1408
1409 sta = ap_add_sta(local->ap, hdr->addr2);
1410 if (sta == NULL) {
1411 txt = "ap_add_sta failed";
1412 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1413 goto fail;
1414 }
1415 }
1416
1417 switch (auth_alg) {
1418 case WLAN_AUTH_OPEN:
1419 txt = "authOK";
1420 /* IEEE 802.11 standard is not completely clear about
1421 * whether STA is considered authenticated after
1422 * authentication OK frame has been send or after it
1423 * has been ACKed. In order to reduce interoperability
1424 * issues, mark the STA authenticated before ACK. */
1425 sta->flags |= WLAN_STA_AUTH;
1426 break;
1427
1428 case WLAN_AUTH_SHARED_KEY:
1429 if (auth_transaction == 1) {
1430 if (sta->u.sta.challenge == NULL) {
1431 sta->u.sta.challenge =
1432 ap_auth_make_challenge(local->ap);
1433 if (sta->u.sta.challenge == NULL) {
1434 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1435 goto fail;
1436 }
1437 }
1438 } else {
1439 if (sta->u.sta.challenge == NULL ||
1440 challenge == NULL ||
1441 memcmp(sta->u.sta.challenge, challenge,
1442 WLAN_AUTH_CHALLENGE_LEN) != 0 ||
1443 !(fc & IEEE80211_FCTL_PROTECTED)) {
1444 txt = "challenge response incorrect";
1445 resp = WLAN_STATUS_CHALLENGE_FAIL;
1446 goto fail;
1447 }
1448
1449 txt = "challenge OK - authOK";
1450 /* IEEE 802.11 standard is not completely clear about
1451 * whether STA is considered authenticated after
1452 * authentication OK frame has been send or after it
1453 * has been ACKed. In order to reduce interoperability
1454 * issues, mark the STA authenticated before ACK. */
1455 sta->flags |= WLAN_STA_AUTH;
1456 kfree(sta->u.sta.challenge);
1457 sta->u.sta.challenge = NULL;
1458 }
1459 break;
1460 }
1461
1462 fail:
1463 pos = (u16 *) body;
1464 *pos = cpu_to_le16(auth_alg);
1465 pos++;
1466 *pos = cpu_to_le16(auth_transaction + 1);
1467 pos++;
1468 *pos = cpu_to_le16(resp); /* status_code */
1469 pos++;
1470 olen = 6;
1471
1472 if (resp == WLAN_STATUS_SUCCESS && sta != NULL &&
1473 sta->u.sta.challenge != NULL &&
1474 auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 1) {
1475 u8 *tmp = (u8 *) pos;
1476 *tmp++ = WLAN_EID_CHALLENGE;
1477 *tmp++ = WLAN_AUTH_CHALLENGE_LEN;
1478 pos++;
1479 memcpy(pos, sta->u.sta.challenge, WLAN_AUTH_CHALLENGE_LEN);
1480 olen += 2 + WLAN_AUTH_CHALLENGE_LEN;
1481 }
1482
1483 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_AUTH,
1484 body, olen, hdr->addr2, ap->tx_callback_auth);
1485
1486 if (sta) {
1487 sta->last_rx = jiffies;
1488 atomic_dec(&sta->users);
1489 }
1490
1491 if (resp) {
1492 PDEBUG(DEBUG_AP, "%s: " MACSTR " auth (alg=%d trans#=%d "
1493 "stat=%d len=%d fc=%04x) ==> %d (%s)\n",
1494 dev->name, MAC2STR(hdr->addr2), auth_alg,
1495 auth_transaction, status_code, len, fc, resp, txt);
1496 }
1497 }
1498
1499
1500 /* Called only as a scheduled task for pending AP frames. */
1501 static void handle_assoc(local_info_t *local, struct sk_buff *skb,
1502 struct hostap_80211_rx_status *rx_stats, int reassoc)
1503 {
1504 struct net_device *dev = local->dev;
1505 struct ieee80211_hdr_4addr *hdr = (struct ieee80211_hdr_4addr *) skb->data;
1506 char body[12], *p, *lpos;
1507 int len, left;
1508 u16 *pos;
1509 u16 resp = WLAN_STATUS_SUCCESS;
1510 struct sta_info *sta = NULL;
1511 int send_deauth = 0;
1512 char *txt = "";
1513 u8 prev_ap[ETH_ALEN];
1514
1515 left = len = skb->len - IEEE80211_MGMT_HDR_LEN;
1516
1517 if (len < (reassoc ? 10 : 4)) {
1518 PDEBUG(DEBUG_AP, "%s: handle_assoc - too short payload "
1519 "(len=%d, reassoc=%d) from " MACSTR "\n",
1520 dev->name, len, reassoc, MAC2STR(hdr->addr2));
1521 return;
1522 }
1523
1524 spin_lock_bh(&local->ap->sta_table_lock);
1525 sta = ap_get_sta(local->ap, hdr->addr2);
1526 if (sta == NULL || (sta->flags & WLAN_STA_AUTH) == 0) {
1527 spin_unlock_bh(&local->ap->sta_table_lock);
1528 txt = "trying to associate before authentication";
1529 send_deauth = 1;
1530 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1531 sta = NULL; /* do not decrement sta->users */
1532 goto fail;
1533 }
1534 atomic_inc(&sta->users);
1535 spin_unlock_bh(&local->ap->sta_table_lock);
1536
1537 pos = (u16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
1538 sta->capability = __le16_to_cpu(*pos);
1539 pos++; left -= 2;
1540 sta->listen_interval = __le16_to_cpu(*pos);
1541 pos++; left -= 2;
1542
1543 if (reassoc) {
1544 memcpy(prev_ap, pos, ETH_ALEN);
1545 pos++; pos++; pos++; left -= 6;
1546 } else
1547 memset(prev_ap, 0, ETH_ALEN);
1548
1549 if (left >= 2) {
1550 unsigned int ileft;
1551 unsigned char *u = (unsigned char *) pos;
1552
1553 if (*u == WLAN_EID_SSID) {
1554 u++; left--;
1555 ileft = *u;
1556 u++; left--;
1557
1558 if (ileft > left || ileft > MAX_SSID_LEN) {
1559 txt = "SSID overflow";
1560 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1561 goto fail;
1562 }
1563
1564 if (ileft != strlen(local->essid) ||
1565 memcmp(local->essid, u, ileft) != 0) {
1566 txt = "not our SSID";
1567 resp = WLAN_STATUS_ASSOC_DENIED_UNSPEC;
1568 goto fail;
1569 }
1570
1571 u += ileft;
1572 left -= ileft;
1573 }
1574
1575 if (left >= 2 && *u == WLAN_EID_SUPP_RATES) {
1576 u++; left--;
1577 ileft = *u;
1578 u++; left--;
1579
1580 if (ileft > left || ileft == 0 ||
1581 ileft > WLAN_SUPP_RATES_MAX) {
1582 txt = "SUPP_RATES len error";
1583 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1584 goto fail;
1585 }
1586
1587 memset(sta->supported_rates, 0,
1588 sizeof(sta->supported_rates));
1589 memcpy(sta->supported_rates, u, ileft);
1590 prism2_check_tx_rates(sta);
1591
1592 u += ileft;
1593 left -= ileft;
1594 }
1595
1596 if (left > 0) {
1597 PDEBUG(DEBUG_AP, "%s: assoc from " MACSTR " with extra"
1598 " data (%d bytes) [",
1599 dev->name, MAC2STR(hdr->addr2), left);
1600 while (left > 0) {
1601 PDEBUG2(DEBUG_AP, "<%02x>", *u);
1602 u++; left--;
1603 }
1604 PDEBUG2(DEBUG_AP, "]\n");
1605 }
1606 } else {
1607 txt = "frame underflow";
1608 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1609 goto fail;
1610 }
1611
1612 /* get a unique AID */
1613 if (sta->aid > 0)
1614 txt = "OK, old AID";
1615 else {
1616 spin_lock_bh(&local->ap->sta_table_lock);
1617 for (sta->aid = 1; sta->aid <= MAX_AID_TABLE_SIZE; sta->aid++)
1618 if (local->ap->sta_aid[sta->aid - 1] == NULL)
1619 break;
1620 if (sta->aid > MAX_AID_TABLE_SIZE) {
1621 sta->aid = 0;
1622 spin_unlock_bh(&local->ap->sta_table_lock);
1623 resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
1624 txt = "no room for more AIDs";
1625 } else {
1626 local->ap->sta_aid[sta->aid - 1] = sta;
1627 spin_unlock_bh(&local->ap->sta_table_lock);
1628 txt = "OK, new AID";
1629 }
1630 }
1631
1632 fail:
1633 pos = (u16 *) body;
1634
1635 if (send_deauth) {
1636 *pos = __constant_cpu_to_le16(
1637 WLAN_REASON_STA_REQ_ASSOC_WITHOUT_AUTH);
1638 pos++;
1639 } else {
1640 /* FIX: CF-Pollable and CF-PollReq should be set to match the
1641 * values in beacons/probe responses */
1642 /* FIX: how about privacy and WEP? */
1643 /* capability */
1644 *pos = __constant_cpu_to_le16(WLAN_CAPABILITY_ESS);
1645 pos++;
1646
1647 /* status_code */
1648 *pos = __cpu_to_le16(resp);
1649 pos++;
1650
1651 *pos = __cpu_to_le16((sta && sta->aid > 0 ? sta->aid : 0) |
1652 BIT(14) | BIT(15)); /* AID */
1653 pos++;
1654
1655 /* Supported rates (Information element) */
1656 p = (char *) pos;
1657 *p++ = WLAN_EID_SUPP_RATES;
1658 lpos = p;
1659 *p++ = 0; /* len */
1660 if (local->tx_rate_control & WLAN_RATE_1M) {
1661 *p++ = local->basic_rates & WLAN_RATE_1M ? 0x82 : 0x02;
1662 (*lpos)++;
1663 }
1664 if (local->tx_rate_control & WLAN_RATE_2M) {
1665 *p++ = local->basic_rates & WLAN_RATE_2M ? 0x84 : 0x04;
1666 (*lpos)++;
1667 }
1668 if (local->tx_rate_control & WLAN_RATE_5M5) {
1669 *p++ = local->basic_rates & WLAN_RATE_5M5 ?
1670 0x8b : 0x0b;
1671 (*lpos)++;
1672 }
1673 if (local->tx_rate_control & WLAN_RATE_11M) {
1674 *p++ = local->basic_rates & WLAN_RATE_11M ?
1675 0x96 : 0x16;
1676 (*lpos)++;
1677 }
1678 pos = (u16 *) p;
1679 }
1680
1681 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT |
1682 (send_deauth ? IEEE80211_STYPE_DEAUTH :
1683 (reassoc ? IEEE80211_STYPE_REASSOC_RESP :
1684 IEEE80211_STYPE_ASSOC_RESP)),
1685 body, (u8 *) pos - (u8 *) body,
1686 hdr->addr2,
1687 send_deauth ? 0 : local->ap->tx_callback_assoc);
1688
1689 if (sta) {
1690 if (resp == WLAN_STATUS_SUCCESS) {
1691 sta->last_rx = jiffies;
1692 /* STA will be marked associated from TX callback, if
1693 * AssocResp is ACKed */
1694 }
1695 atomic_dec(&sta->users);
1696 }
1697
1698 #if 0
1699 PDEBUG(DEBUG_AP, "%s: " MACSTR " %sassoc (len=%d prev_ap=" MACSTR
1700 ") => %d(%d) (%s)\n",
1701 dev->name, MAC2STR(hdr->addr2), reassoc ? "re" : "", len,
1702 MAC2STR(prev_ap), resp, send_deauth, txt);
1703 #endif
1704 }
1705
1706
1707 /* Called only as a scheduled task for pending AP frames. */
1708 static void handle_deauth(local_info_t *local, struct sk_buff *skb,
1709 struct hostap_80211_rx_status *rx_stats)
1710 {
1711 struct net_device *dev = local->dev;
1712 struct ieee80211_hdr_4addr *hdr = (struct ieee80211_hdr_4addr *) skb->data;
1713 char *body = (char *) (skb->data + IEEE80211_MGMT_HDR_LEN);
1714 int len;
1715 u16 reason_code, *pos;
1716 struct sta_info *sta = NULL;
1717
1718 len = skb->len - IEEE80211_MGMT_HDR_LEN;
1719
1720 if (len < 2) {
1721 printk("handle_deauth - too short payload (len=%d)\n", len);
1722 return;
1723 }
1724
1725 pos = (u16 *) body;
1726 reason_code = __le16_to_cpu(*pos);
1727
1728 PDEBUG(DEBUG_AP, "%s: deauthentication: " MACSTR " len=%d, "
1729 "reason_code=%d\n", dev->name, MAC2STR(hdr->addr2), len,
1730 reason_code);
1731
1732 spin_lock_bh(&local->ap->sta_table_lock);
1733 sta = ap_get_sta(local->ap, hdr->addr2);
1734 if (sta != NULL) {
1735 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap)
1736 hostap_event_expired_sta(local->dev, sta);
1737 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
1738 }
1739 spin_unlock_bh(&local->ap->sta_table_lock);
1740 if (sta == NULL) {
1741 printk("%s: deauthentication from " MACSTR ", "
1742 "reason_code=%d, but STA not authenticated\n", dev->name,
1743 MAC2STR(hdr->addr2), reason_code);
1744 }
1745 }
1746
1747
1748 /* Called only as a scheduled task for pending AP frames. */
1749 static void handle_disassoc(local_info_t *local, struct sk_buff *skb,
1750 struct hostap_80211_rx_status *rx_stats)
1751 {
1752 struct net_device *dev = local->dev;
1753 struct ieee80211_hdr_4addr *hdr = (struct ieee80211_hdr_4addr *) skb->data;
1754 char *body = skb->data + IEEE80211_MGMT_HDR_LEN;
1755 int len;
1756 u16 reason_code, *pos;
1757 struct sta_info *sta = NULL;
1758
1759 len = skb->len - IEEE80211_MGMT_HDR_LEN;
1760
1761 if (len < 2) {
1762 printk("handle_disassoc - too short payload (len=%d)\n", len);
1763 return;
1764 }
1765
1766 pos = (u16 *) body;
1767 reason_code = __le16_to_cpu(*pos);
1768
1769 PDEBUG(DEBUG_AP, "%s: disassociation: " MACSTR " len=%d, "
1770 "reason_code=%d\n", dev->name, MAC2STR(hdr->addr2), len,
1771 reason_code);
1772
1773 spin_lock_bh(&local->ap->sta_table_lock);
1774 sta = ap_get_sta(local->ap, hdr->addr2);
1775 if (sta != NULL) {
1776 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap)
1777 hostap_event_expired_sta(local->dev, sta);
1778 sta->flags &= ~WLAN_STA_ASSOC;
1779 }
1780 spin_unlock_bh(&local->ap->sta_table_lock);
1781 if (sta == NULL) {
1782 printk("%s: disassociation from " MACSTR ", "
1783 "reason_code=%d, but STA not authenticated\n",
1784 dev->name, MAC2STR(hdr->addr2), reason_code);
1785 }
1786 }
1787
1788
1789 /* Called only as a scheduled task for pending AP frames. */
1790 static void ap_handle_data_nullfunc(local_info_t *local,
1791 struct ieee80211_hdr_4addr *hdr)
1792 {
1793 struct net_device *dev = local->dev;
1794
1795 /* some STA f/w's seem to require control::ACK frame for
1796 * data::nullfunc, but at least Prism2 station f/w version 0.8.0 does
1797 * not send this..
1798 * send control::ACK for the data::nullfunc */
1799
1800 printk(KERN_DEBUG "Sending control::ACK for data::nullfunc\n");
1801 prism2_send_mgmt(dev, IEEE80211_FTYPE_CTL | IEEE80211_STYPE_ACK,
1802 NULL, 0, hdr->addr2, 0);
1803 }
1804
1805
1806 /* Called only as a scheduled task for pending AP frames. */
1807 static void ap_handle_dropped_data(local_info_t *local,
1808 struct ieee80211_hdr_4addr *hdr)
1809 {
1810 struct net_device *dev = local->dev;
1811 struct sta_info *sta;
1812 u16 reason;
1813
1814 spin_lock_bh(&local->ap->sta_table_lock);
1815 sta = ap_get_sta(local->ap, hdr->addr2);
1816 if (sta)
1817 atomic_inc(&sta->users);
1818 spin_unlock_bh(&local->ap->sta_table_lock);
1819
1820 if (sta != NULL && (sta->flags & WLAN_STA_ASSOC)) {
1821 PDEBUG(DEBUG_AP, "ap_handle_dropped_data: STA is now okay?\n");
1822 atomic_dec(&sta->users);
1823 return;
1824 }
1825
1826 reason = __constant_cpu_to_le16(
1827 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
1828 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT |
1829 ((sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) ?
1830 IEEE80211_STYPE_DEAUTH : IEEE80211_STYPE_DISASSOC),
1831 (char *) &reason, sizeof(reason), hdr->addr2, 0);
1832
1833 if (sta)
1834 atomic_dec(&sta->users);
1835 }
1836
1837 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1838
1839
1840 /* Called only as a scheduled task for pending AP frames. */
1841 static void pspoll_send_buffered(local_info_t *local, struct sta_info *sta,
1842 struct sk_buff *skb)
1843 {
1844 struct hostap_skb_tx_data *meta;
1845
1846 if (!(sta->flags & WLAN_STA_PS)) {
1847 /* Station has moved to non-PS mode, so send all buffered
1848 * frames using normal device queue. */
1849 dev_queue_xmit(skb);
1850 return;
1851 }
1852
1853 /* add a flag for hostap_handle_sta_tx() to know that this skb should
1854 * be passed through even though STA is using PS */
1855 meta = (struct hostap_skb_tx_data *) skb->cb;
1856 meta->flags |= HOSTAP_TX_FLAGS_BUFFERED_FRAME;
1857 if (!skb_queue_empty(&sta->tx_buf)) {
1858 /* indicate to STA that more frames follow */
1859 meta->flags |= HOSTAP_TX_FLAGS_ADD_MOREDATA;
1860 }
1861 dev_queue_xmit(skb);
1862 }
1863
1864
1865 /* Called only as a scheduled task for pending AP frames. */
1866 static void handle_pspoll(local_info_t *local,
1867 struct ieee80211_hdr_4addr *hdr,
1868 struct hostap_80211_rx_status *rx_stats)
1869 {
1870 struct net_device *dev = local->dev;
1871 struct sta_info *sta;
1872 u16 aid;
1873 struct sk_buff *skb;
1874
1875 PDEBUG(DEBUG_PS2, "handle_pspoll: BSSID=" MACSTR ", TA=" MACSTR
1876 " PWRMGT=%d\n",
1877 MAC2STR(hdr->addr1), MAC2STR(hdr->addr2),
1878 !!(le16_to_cpu(hdr->frame_ctl) & IEEE80211_FCTL_PM));
1879
1880 if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN)) {
1881 PDEBUG(DEBUG_AP, "handle_pspoll - addr1(BSSID)=" MACSTR
1882 " not own MAC\n", MAC2STR(hdr->addr1));
1883 return;
1884 }
1885
1886 aid = __le16_to_cpu(hdr->duration_id);
1887 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) {
1888 PDEBUG(DEBUG_PS, " PSPOLL and AID[15:14] not set\n");
1889 return;
1890 }
1891 aid &= ~BIT(15) & ~BIT(14);
1892 if (aid == 0 || aid > MAX_AID_TABLE_SIZE) {
1893 PDEBUG(DEBUG_PS, " invalid aid=%d\n", aid);
1894 return;
1895 }
1896 PDEBUG(DEBUG_PS2, " aid=%d\n", aid);
1897
1898 spin_lock_bh(&local->ap->sta_table_lock);
1899 sta = ap_get_sta(local->ap, hdr->addr2);
1900 if (sta)
1901 atomic_inc(&sta->users);
1902 spin_unlock_bh(&local->ap->sta_table_lock);
1903
1904 if (sta == NULL) {
1905 PDEBUG(DEBUG_PS, " STA not found\n");
1906 return;
1907 }
1908 if (sta->aid != aid) {
1909 PDEBUG(DEBUG_PS, " received aid=%i does not match with "
1910 "assoc.aid=%d\n", aid, sta->aid);
1911 return;
1912 }
1913
1914 /* FIX: todo:
1915 * - add timeout for buffering (clear aid in TIM vector if buffer timed
1916 * out (expiry time must be longer than ListenInterval for
1917 * the corresponding STA; "8802-11: 11.2.1.9 AP aging function"
1918 * - what to do, if buffered, pspolled, and sent frame is not ACKed by
1919 * sta; store buffer for later use and leave TIM aid bit set? use
1920 * TX event to check whether frame was ACKed?
1921 */
1922
1923 while ((skb = skb_dequeue(&sta->tx_buf)) != NULL) {
1924 /* send buffered frame .. */
1925 PDEBUG(DEBUG_PS2, "Sending buffered frame to STA after PS POLL"
1926 " (buffer_count=%d)\n", skb_queue_len(&sta->tx_buf));
1927
1928 pspoll_send_buffered(local, sta, skb);
1929
1930 if (sta->flags & WLAN_STA_PS) {
1931 /* send only one buffered packet per PS Poll */
1932 /* FIX: should ignore further PS Polls until the
1933 * buffered packet that was just sent is acknowledged
1934 * (Tx or TxExc event) */
1935 break;
1936 }
1937 }
1938
1939 if (skb_queue_empty(&sta->tx_buf)) {
1940 /* try to clear aid from TIM */
1941 if (!(sta->flags & WLAN_STA_TIM))
1942 PDEBUG(DEBUG_PS2, "Re-unsetting TIM for aid %d\n",
1943 aid);
1944 hostap_set_tim(local, aid, 0);
1945 sta->flags &= ~WLAN_STA_TIM;
1946 }
1947
1948 atomic_dec(&sta->users);
1949 }
1950
1951
1952 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1953
1954 static void handle_wds_oper_queue(struct work_struct *work)
1955 {
1956 struct ap_data *ap = container_of(work, struct ap_data,
1957 wds_oper_queue);
1958 local_info_t *local = ap->local;
1959 struct wds_oper_data *entry, *prev;
1960
1961 spin_lock_bh(&local->lock);
1962 entry = local->ap->wds_oper_entries;
1963 local->ap->wds_oper_entries = NULL;
1964 spin_unlock_bh(&local->lock);
1965
1966 while (entry) {
1967 PDEBUG(DEBUG_AP, "%s: %s automatic WDS connection "
1968 "to AP " MACSTR "\n",
1969 local->dev->name,
1970 entry->type == WDS_ADD ? "adding" : "removing",
1971 MAC2STR(entry->addr));
1972 if (entry->type == WDS_ADD)
1973 prism2_wds_add(local, entry->addr, 0);
1974 else if (entry->type == WDS_DEL)
1975 prism2_wds_del(local, entry->addr, 0, 1);
1976
1977 prev = entry;
1978 entry = entry->next;
1979 kfree(prev);
1980 }
1981 }
1982
1983
1984 /* Called only as a scheduled task for pending AP frames. */
1985 static void handle_beacon(local_info_t *local, struct sk_buff *skb,
1986 struct hostap_80211_rx_status *rx_stats)
1987 {
1988 struct ieee80211_hdr_4addr *hdr = (struct ieee80211_hdr_4addr *) skb->data;
1989 char *body = skb->data + IEEE80211_MGMT_HDR_LEN;
1990 int len, left;
1991 u16 *pos, beacon_int, capability;
1992 char *ssid = NULL;
1993 unsigned char *supp_rates = NULL;
1994 int ssid_len = 0, supp_rates_len = 0;
1995 struct sta_info *sta = NULL;
1996 int new_sta = 0, channel = -1;
1997
1998 len = skb->len - IEEE80211_MGMT_HDR_LEN;
1999
2000 if (len < 8 + 2 + 2) {
2001 printk(KERN_DEBUG "handle_beacon - too short payload "
2002 "(len=%d)\n", len);
2003 return;
2004 }
2005
2006 pos = (u16 *) body;
2007 left = len;
2008
2009 /* Timestamp (8 octets) */
2010 pos += 4; left -= 8;
2011 /* Beacon interval (2 octets) */
2012 beacon_int = __le16_to_cpu(*pos);
2013 pos++; left -= 2;
2014 /* Capability information (2 octets) */
2015 capability = __le16_to_cpu(*pos);
2016 pos++; left -= 2;
2017
2018 if (local->ap->ap_policy != AP_OTHER_AP_EVEN_IBSS &&
2019 capability & WLAN_CAPABILITY_IBSS)
2020 return;
2021
2022 if (left >= 2) {
2023 unsigned int ileft;
2024 unsigned char *u = (unsigned char *) pos;
2025
2026 if (*u == WLAN_EID_SSID) {
2027 u++; left--;
2028 ileft = *u;
2029 u++; left--;
2030
2031 if (ileft > left || ileft > MAX_SSID_LEN) {
2032 PDEBUG(DEBUG_AP, "SSID: overflow\n");
2033 return;
2034 }
2035
2036 if (local->ap->ap_policy == AP_OTHER_AP_SAME_SSID &&
2037 (ileft != strlen(local->essid) ||
2038 memcmp(local->essid, u, ileft) != 0)) {
2039 /* not our SSID */
2040 return;
2041 }
2042
2043 ssid = u;
2044 ssid_len = ileft;
2045
2046 u += ileft;
2047 left -= ileft;
2048 }
2049
2050 if (*u == WLAN_EID_SUPP_RATES) {
2051 u++; left--;
2052 ileft = *u;
2053 u++; left--;
2054
2055 if (ileft > left || ileft == 0 || ileft > 8) {
2056 PDEBUG(DEBUG_AP, " - SUPP_RATES len error\n");
2057 return;
2058 }
2059
2060 supp_rates = u;
2061 supp_rates_len = ileft;
2062
2063 u += ileft;
2064 left -= ileft;
2065 }
2066
2067 if (*u == WLAN_EID_DS_PARAMS) {
2068 u++; left--;
2069 ileft = *u;
2070 u++; left--;
2071
2072 if (ileft > left || ileft != 1) {
2073 PDEBUG(DEBUG_AP, " - DS_PARAMS len error\n");
2074 return;
2075 }
2076
2077 channel = *u;
2078
2079 u += ileft;
2080 left -= ileft;
2081 }
2082 }
2083
2084 spin_lock_bh(&local->ap->sta_table_lock);
2085 sta = ap_get_sta(local->ap, hdr->addr2);
2086 if (sta != NULL)
2087 atomic_inc(&sta->users);
2088 spin_unlock_bh(&local->ap->sta_table_lock);
2089
2090 if (sta == NULL) {
2091 /* add new AP */
2092 new_sta = 1;
2093 sta = ap_add_sta(local->ap, hdr->addr2);
2094 if (sta == NULL) {
2095 printk(KERN_INFO "prism2: kmalloc failed for AP "
2096 "data structure\n");
2097 return;
2098 }
2099 hostap_event_new_sta(local->dev, sta);
2100
2101 /* mark APs authentication and associated for pseudo ad-hoc
2102 * style communication */
2103 sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
2104
2105 if (local->ap->autom_ap_wds) {
2106 hostap_wds_link_oper(local, sta->addr, WDS_ADD);
2107 }
2108 }
2109
2110 sta->ap = 1;
2111 if (ssid) {
2112 sta->u.ap.ssid_len = ssid_len;
2113 memcpy(sta->u.ap.ssid, ssid, ssid_len);
2114 sta->u.ap.ssid[ssid_len] = '\0';
2115 } else {
2116 sta->u.ap.ssid_len = 0;
2117 sta->u.ap.ssid[0] = '\0';
2118 }
2119 sta->u.ap.channel = channel;
2120 sta->rx_packets++;
2121 sta->rx_bytes += len;
2122 sta->u.ap.last_beacon = sta->last_rx = jiffies;
2123 sta->capability = capability;
2124 sta->listen_interval = beacon_int;
2125
2126 atomic_dec(&sta->users);
2127
2128 if (new_sta) {
2129 memset(sta->supported_rates, 0, sizeof(sta->supported_rates));
2130 memcpy(sta->supported_rates, supp_rates, supp_rates_len);
2131 prism2_check_tx_rates(sta);
2132 }
2133 }
2134
2135 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2136
2137
2138 /* Called only as a tasklet. */
2139 static void handle_ap_item(local_info_t *local, struct sk_buff *skb,
2140 struct hostap_80211_rx_status *rx_stats)
2141 {
2142 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2143 struct net_device *dev = local->dev;
2144 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2145 u16 fc, type, stype;
2146 struct ieee80211_hdr_4addr *hdr;
2147
2148 /* FIX: should give skb->len to handler functions and check that the
2149 * buffer is long enough */
2150 hdr = (struct ieee80211_hdr_4addr *) skb->data;
2151 fc = le16_to_cpu(hdr->frame_ctl);
2152 type = WLAN_FC_GET_TYPE(fc);
2153 stype = WLAN_FC_GET_STYPE(fc);
2154
2155 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2156 if (!local->hostapd && type == IEEE80211_FTYPE_DATA) {
2157 PDEBUG(DEBUG_AP, "handle_ap_item - data frame\n");
2158
2159 if (!(fc & IEEE80211_FCTL_TODS) ||
2160 (fc & IEEE80211_FCTL_FROMDS)) {
2161 if (stype == IEEE80211_STYPE_NULLFUNC) {
2162 /* no ToDS nullfunc seems to be used to check
2163 * AP association; so send reject message to
2164 * speed up re-association */
2165 ap_handle_dropped_data(local, hdr);
2166 goto done;
2167 }
2168 PDEBUG(DEBUG_AP, " not ToDS frame (fc=0x%04x)\n",
2169 fc);
2170 goto done;
2171 }
2172
2173 if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN)) {
2174 PDEBUG(DEBUG_AP, "handle_ap_item - addr1(BSSID)="
2175 MACSTR " not own MAC\n",
2176 MAC2STR(hdr->addr1));
2177 goto done;
2178 }
2179
2180 if (local->ap->nullfunc_ack &&
2181 stype == IEEE80211_STYPE_NULLFUNC)
2182 ap_handle_data_nullfunc(local, hdr);
2183 else
2184 ap_handle_dropped_data(local, hdr);
2185 goto done;
2186 }
2187
2188 if (type == IEEE80211_FTYPE_MGMT && stype == IEEE80211_STYPE_BEACON) {
2189 handle_beacon(local, skb, rx_stats);
2190 goto done;
2191 }
2192 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2193
2194 if (type == IEEE80211_FTYPE_CTL && stype == IEEE80211_STYPE_PSPOLL) {
2195 handle_pspoll(local, hdr, rx_stats);
2196 goto done;
2197 }
2198
2199 if (local->hostapd) {
2200 PDEBUG(DEBUG_AP, "Unknown frame in AP queue: type=0x%02x "
2201 "subtype=0x%02x\n", type, stype);
2202 goto done;
2203 }
2204
2205 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2206 if (type != IEEE80211_FTYPE_MGMT) {
2207 PDEBUG(DEBUG_AP, "handle_ap_item - not a management frame?\n");
2208 goto done;
2209 }
2210
2211 if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN)) {
2212 PDEBUG(DEBUG_AP, "handle_ap_item - addr1(DA)=" MACSTR
2213 " not own MAC\n", MAC2STR(hdr->addr1));
2214 goto done;
2215 }
2216
2217 if (memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN)) {
2218 PDEBUG(DEBUG_AP, "handle_ap_item - addr3(BSSID)=" MACSTR
2219 " not own MAC\n", MAC2STR(hdr->addr3));
2220 goto done;
2221 }
2222
2223 switch (stype) {
2224 case IEEE80211_STYPE_ASSOC_REQ:
2225 handle_assoc(local, skb, rx_stats, 0);
2226 break;
2227 case IEEE80211_STYPE_ASSOC_RESP:
2228 PDEBUG(DEBUG_AP, "==> ASSOC RESP (ignored)\n");
2229 break;
2230 case IEEE80211_STYPE_REASSOC_REQ:
2231 handle_assoc(local, skb, rx_stats, 1);
2232 break;
2233 case IEEE80211_STYPE_REASSOC_RESP:
2234 PDEBUG(DEBUG_AP, "==> REASSOC RESP (ignored)\n");
2235 break;
2236 case IEEE80211_STYPE_ATIM:
2237 PDEBUG(DEBUG_AP, "==> ATIM (ignored)\n");
2238 break;
2239 case IEEE80211_STYPE_DISASSOC:
2240 handle_disassoc(local, skb, rx_stats);
2241 break;
2242 case IEEE80211_STYPE_AUTH:
2243 handle_authen(local, skb, rx_stats);
2244 break;
2245 case IEEE80211_STYPE_DEAUTH:
2246 handle_deauth(local, skb, rx_stats);
2247 break;
2248 default:
2249 PDEBUG(DEBUG_AP, "Unknown mgmt frame subtype 0x%02x\n",
2250 stype >> 4);
2251 break;
2252 }
2253 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2254
2255 done:
2256 dev_kfree_skb(skb);
2257 }
2258
2259
2260 /* Called only as a tasklet (software IRQ) */
2261 void hostap_rx(struct net_device *dev, struct sk_buff *skb,
2262 struct hostap_80211_rx_status *rx_stats)
2263 {
2264 struct hostap_interface *iface;
2265 local_info_t *local;
2266 u16 fc;
2267 struct ieee80211_hdr_4addr *hdr;
2268
2269 iface = netdev_priv(dev);
2270 local = iface->local;
2271
2272 if (skb->len < 16)
2273 goto drop;
2274
2275 local->stats.rx_packets++;
2276
2277 hdr = (struct ieee80211_hdr_4addr *) skb->data;
2278 fc = le16_to_cpu(hdr->frame_ctl);
2279
2280 if (local->ap->ap_policy == AP_OTHER_AP_SKIP_ALL &&
2281 WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_MGMT &&
2282 WLAN_FC_GET_STYPE(fc) == IEEE80211_STYPE_BEACON)
2283 goto drop;
2284
2285 skb->protocol = __constant_htons(ETH_P_HOSTAP);
2286 handle_ap_item(local, skb, rx_stats);
2287 return;
2288
2289 drop:
2290 dev_kfree_skb(skb);
2291 }
2292
2293
2294 /* Called only as a tasklet (software IRQ) */
2295 static void schedule_packet_send(local_info_t *local, struct sta_info *sta)
2296 {
2297 struct sk_buff *skb;
2298 struct ieee80211_hdr_4addr *hdr;
2299 struct hostap_80211_rx_status rx_stats;
2300
2301 if (skb_queue_empty(&sta->tx_buf))
2302 return;
2303
2304 skb = dev_alloc_skb(16);
2305 if (skb == NULL) {
2306 printk(KERN_DEBUG "%s: schedule_packet_send: skb alloc "
2307 "failed\n", local->dev->name);
2308 return;
2309 }
2310
2311 hdr = (struct ieee80211_hdr_4addr *) skb_put(skb, 16);
2312
2313 /* Generate a fake pspoll frame to start packet delivery */
2314 hdr->frame_ctl = __constant_cpu_to_le16(
2315 IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL);
2316 memcpy(hdr->addr1, local->dev->dev_addr, ETH_ALEN);
2317 memcpy(hdr->addr2, sta->addr, ETH_ALEN);
2318 hdr->duration_id = cpu_to_le16(sta->aid | BIT(15) | BIT(14));
2319
2320 PDEBUG(DEBUG_PS2, "%s: Scheduling buffered packet delivery for "
2321 "STA " MACSTR "\n", local->dev->name, MAC2STR(sta->addr));
2322
2323 skb->dev = local->dev;
2324
2325 memset(&rx_stats, 0, sizeof(rx_stats));
2326 hostap_rx(local->dev, skb, &rx_stats);
2327 }
2328
2329
2330 int prism2_ap_get_sta_qual(local_info_t *local, struct sockaddr addr[],
2331 struct iw_quality qual[], int buf_size,
2332 int aplist)
2333 {
2334 struct ap_data *ap = local->ap;
2335 struct list_head *ptr;
2336 int count = 0;
2337
2338 spin_lock_bh(&ap->sta_table_lock);
2339
2340 for (ptr = ap->sta_list.next; ptr != NULL && ptr != &ap->sta_list;
2341 ptr = ptr->next) {
2342 struct sta_info *sta = (struct sta_info *) ptr;
2343
2344 if (aplist && !sta->ap)
2345 continue;
2346 addr[count].sa_family = ARPHRD_ETHER;
2347 memcpy(addr[count].sa_data, sta->addr, ETH_ALEN);
2348 if (sta->last_rx_silence == 0)
2349 qual[count].qual = sta->last_rx_signal < 27 ?
2350 0 : (sta->last_rx_signal - 27) * 92 / 127;
2351 else
2352 qual[count].qual = sta->last_rx_signal -
2353 sta->last_rx_silence - 35;
2354 qual[count].level = HFA384X_LEVEL_TO_dBm(sta->last_rx_signal);
2355 qual[count].noise = HFA384X_LEVEL_TO_dBm(sta->last_rx_silence);
2356 qual[count].updated = sta->last_rx_updated;
2357
2358 sta->last_rx_updated = IW_QUAL_DBM;
2359
2360 count++;
2361 if (count >= buf_size)
2362 break;
2363 }
2364 spin_unlock_bh(&ap->sta_table_lock);
2365
2366 return count;
2367 }
2368
2369
2370 /* Translate our list of Access Points & Stations to a card independant
2371 * format that the Wireless Tools will understand - Jean II */
2372 int prism2_ap_translate_scan(struct net_device *dev, char *buffer)
2373 {
2374 struct hostap_interface *iface;
2375 local_info_t *local;
2376 struct ap_data *ap;
2377 struct list_head *ptr;
2378 struct iw_event iwe;
2379 char *current_ev = buffer;
2380 char *end_buf = buffer + IW_SCAN_MAX_DATA;
2381 #if !defined(PRISM2_NO_KERNEL_IEEE80211_MGMT)
2382 char buf[64];
2383 #endif
2384
2385 iface = netdev_priv(dev);
2386 local = iface->local;
2387 ap = local->ap;
2388
2389 spin_lock_bh(&ap->sta_table_lock);
2390
2391 for (ptr = ap->sta_list.next; ptr != NULL && ptr != &ap->sta_list;
2392 ptr = ptr->next) {
2393 struct sta_info *sta = (struct sta_info *) ptr;
2394
2395 /* First entry *MUST* be the AP MAC address */
2396 memset(&iwe, 0, sizeof(iwe));
2397 iwe.cmd = SIOCGIWAP;
2398 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
2399 memcpy(iwe.u.ap_addr.sa_data, sta->addr, ETH_ALEN);
2400 iwe.len = IW_EV_ADDR_LEN;
2401 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2402 IW_EV_ADDR_LEN);
2403
2404 /* Use the mode to indicate if it's a station or
2405 * an Access Point */
2406 memset(&iwe, 0, sizeof(iwe));
2407 iwe.cmd = SIOCGIWMODE;
2408 if (sta->ap)
2409 iwe.u.mode = IW_MODE_MASTER;
2410 else
2411 iwe.u.mode = IW_MODE_INFRA;
2412 iwe.len = IW_EV_UINT_LEN;
2413 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2414 IW_EV_UINT_LEN);
2415
2416 /* Some quality */
2417 memset(&iwe, 0, sizeof(iwe));
2418 iwe.cmd = IWEVQUAL;
2419 if (sta->last_rx_silence == 0)
2420 iwe.u.qual.qual = sta->last_rx_signal < 27 ?
2421 0 : (sta->last_rx_signal - 27) * 92 / 127;
2422 else
2423 iwe.u.qual.qual = sta->last_rx_signal -
2424 sta->last_rx_silence - 35;
2425 iwe.u.qual.level = HFA384X_LEVEL_TO_dBm(sta->last_rx_signal);
2426 iwe.u.qual.noise = HFA384X_LEVEL_TO_dBm(sta->last_rx_silence);
2427 iwe.u.qual.updated = sta->last_rx_updated;
2428 iwe.len = IW_EV_QUAL_LEN;
2429 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2430 IW_EV_QUAL_LEN);
2431
2432 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2433 if (sta->ap) {
2434 memset(&iwe, 0, sizeof(iwe));
2435 iwe.cmd = SIOCGIWESSID;
2436 iwe.u.data.length = sta->u.ap.ssid_len;
2437 iwe.u.data.flags = 1;
2438 current_ev = iwe_stream_add_point(current_ev, end_buf,
2439 &iwe,
2440 sta->u.ap.ssid);
2441
2442 memset(&iwe, 0, sizeof(iwe));
2443 iwe.cmd = SIOCGIWENCODE;
2444 if (sta->capability & WLAN_CAPABILITY_PRIVACY)
2445 iwe.u.data.flags =
2446 IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
2447 else
2448 iwe.u.data.flags = IW_ENCODE_DISABLED;
2449 current_ev = iwe_stream_add_point(current_ev, end_buf,
2450 &iwe,
2451 sta->u.ap.ssid
2452 /* 0 byte memcpy */);
2453
2454 if (sta->u.ap.channel > 0 &&
2455 sta->u.ap.channel <= FREQ_COUNT) {
2456 memset(&iwe, 0, sizeof(iwe));
2457 iwe.cmd = SIOCGIWFREQ;
2458 iwe.u.freq.m = freq_list[sta->u.ap.channel - 1]
2459 * 100000;
2460 iwe.u.freq.e = 1;
2461 current_ev = iwe_stream_add_event(
2462 current_ev, end_buf, &iwe,
2463 IW_EV_FREQ_LEN);
2464 }
2465
2466 memset(&iwe, 0, sizeof(iwe));
2467 iwe.cmd = IWEVCUSTOM;
2468 sprintf(buf, "beacon_interval=%d",
2469 sta->listen_interval);
2470 iwe.u.data.length = strlen(buf);
2471 current_ev = iwe_stream_add_point(current_ev, end_buf,
2472 &iwe, buf);
2473 }
2474 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2475
2476 sta->last_rx_updated = IW_QUAL_DBM;
2477
2478 /* To be continued, we should make good use of IWEVCUSTOM */
2479 }
2480
2481 spin_unlock_bh(&ap->sta_table_lock);
2482
2483 return current_ev - buffer;
2484 }
2485
2486
2487 static int prism2_hostapd_add_sta(struct ap_data *ap,
2488 struct prism2_hostapd_param *param)
2489 {
2490 struct sta_info *sta;
2491
2492 spin_lock_bh(&ap->sta_table_lock);
2493 sta = ap_get_sta(ap, param->sta_addr);
2494 if (sta)
2495 atomic_inc(&sta->users);
2496 spin_unlock_bh(&ap->sta_table_lock);
2497
2498 if (sta == NULL) {
2499 sta = ap_add_sta(ap, param->sta_addr);
2500 if (sta == NULL)
2501 return -1;
2502 }
2503
2504 if (!(sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
2505 hostap_event_new_sta(sta->local->dev, sta);
2506
2507 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC;
2508 sta->last_rx = jiffies;
2509 sta->aid = param->u.add_sta.aid;
2510 sta->capability = param->u.add_sta.capability;
2511 sta->tx_supp_rates = param->u.add_sta.tx_supp_rates;
2512 if (sta->tx_supp_rates & WLAN_RATE_1M)
2513 sta->supported_rates[0] = 2;
2514 if (sta->tx_supp_rates & WLAN_RATE_2M)
2515 sta->supported_rates[1] = 4;
2516 if (sta->tx_supp_rates & WLAN_RATE_5M5)
2517 sta->supported_rates[2] = 11;
2518 if (sta->tx_supp_rates & WLAN_RATE_11M)
2519 sta->supported_rates[3] = 22;
2520 prism2_check_tx_rates(sta);
2521 atomic_dec(&sta->users);
2522 return 0;
2523 }
2524
2525
2526 static int prism2_hostapd_remove_sta(struct ap_data *ap,
2527 struct prism2_hostapd_param *param)
2528 {
2529 struct sta_info *sta;
2530
2531 spin_lock_bh(&ap->sta_table_lock);
2532 sta = ap_get_sta(ap, param->sta_addr);
2533 if (sta) {
2534 ap_sta_hash_del(ap, sta);
2535 list_del(&sta->list);
2536 }
2537 spin_unlock_bh(&ap->sta_table_lock);
2538
2539 if (!sta)
2540 return -ENOENT;
2541
2542 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
2543 hostap_event_expired_sta(sta->local->dev, sta);
2544 ap_free_sta(ap, sta);
2545
2546 return 0;
2547 }
2548
2549
2550 static int prism2_hostapd_get_info_sta(struct ap_data *ap,
2551 struct prism2_hostapd_param *param)
2552 {
2553 struct sta_info *sta;
2554
2555 spin_lock_bh(&ap->sta_table_lock);
2556 sta = ap_get_sta(ap, param->sta_addr);
2557 if (sta)
2558 atomic_inc(&sta->users);
2559 spin_unlock_bh(&ap->sta_table_lock);
2560
2561 if (!sta)
2562 return -ENOENT;
2563
2564 param->u.get_info_sta.inactive_sec = (jiffies - sta->last_rx) / HZ;
2565
2566 atomic_dec(&sta->users);
2567
2568 return 1;
2569 }
2570
2571
2572 static int prism2_hostapd_set_flags_sta(struct ap_data *ap,
2573 struct prism2_hostapd_param *param)
2574 {
2575 struct sta_info *sta;
2576
2577 spin_lock_bh(&ap->sta_table_lock);
2578 sta = ap_get_sta(ap, param->sta_addr);
2579 if (sta) {
2580 sta->flags |= param->u.set_flags_sta.flags_or;
2581 sta->flags &= param->u.set_flags_sta.flags_and;
2582 }
2583 spin_unlock_bh(&ap->sta_table_lock);
2584
2585 if (!sta)
2586 return -ENOENT;
2587
2588 return 0;
2589 }
2590
2591
2592 static int prism2_hostapd_sta_clear_stats(struct ap_data *ap,
2593 struct prism2_hostapd_param *param)
2594 {
2595 struct sta_info *sta;
2596 int rate;
2597
2598 spin_lock_bh(&ap->sta_table_lock);
2599 sta = ap_get_sta(ap, param->sta_addr);
2600 if (sta) {
2601 sta->rx_packets = sta->tx_packets = 0;
2602 sta->rx_bytes = sta->tx_bytes = 0;
2603 for (rate = 0; rate < WLAN_RATE_COUNT; rate++) {
2604 sta->tx_count[rate] = 0;
2605 sta->rx_count[rate] = 0;
2606 }
2607 }
2608 spin_unlock_bh(&ap->sta_table_lock);
2609
2610 if (!sta)
2611 return -ENOENT;
2612
2613 return 0;
2614 }
2615
2616
2617 int prism2_hostapd(struct ap_data *ap, struct prism2_hostapd_param *param)
2618 {
2619 switch (param->cmd) {
2620 case PRISM2_HOSTAPD_FLUSH:
2621 ap_control_kickall(ap);
2622 return 0;
2623 case PRISM2_HOSTAPD_ADD_STA:
2624 return prism2_hostapd_add_sta(ap, param);
2625 case PRISM2_HOSTAPD_REMOVE_STA:
2626 return prism2_hostapd_remove_sta(ap, param);
2627 case PRISM2_HOSTAPD_GET_INFO_STA:
2628 return prism2_hostapd_get_info_sta(ap, param);
2629 case PRISM2_HOSTAPD_SET_FLAGS_STA:
2630 return prism2_hostapd_set_flags_sta(ap, param);
2631 case PRISM2_HOSTAPD_STA_CLEAR_STATS:
2632 return prism2_hostapd_sta_clear_stats(ap, param);
2633 default:
2634 printk(KERN_WARNING "prism2_hostapd: unknown cmd=%d\n",
2635 param->cmd);
2636 return -EOPNOTSUPP;
2637 }
2638 }
2639
2640
2641 /* Update station info for host-based TX rate control and return current
2642 * TX rate */
2643 static int ap_update_sta_tx_rate(struct sta_info *sta, struct net_device *dev)
2644 {
2645 int ret = sta->tx_rate;
2646 struct hostap_interface *iface;
2647 local_info_t *local;
2648
2649 iface = netdev_priv(dev);
2650 local = iface->local;
2651
2652 sta->tx_count[sta->tx_rate_idx]++;
2653 sta->tx_since_last_failure++;
2654 sta->tx_consecutive_exc = 0;
2655 if (sta->tx_since_last_failure >= WLAN_RATE_UPDATE_COUNT &&
2656 sta->tx_rate_idx < sta->tx_max_rate) {
2657 /* use next higher rate */
2658 int old_rate, new_rate;
2659 old_rate = new_rate = sta->tx_rate_idx;
2660 while (new_rate < sta->tx_max_rate) {
2661 new_rate++;
2662 if (ap_tx_rate_ok(new_rate, sta, local)) {
2663 sta->tx_rate_idx = new_rate;
2664 break;
2665 }
2666 }
2667 if (old_rate != sta->tx_rate_idx) {
2668 switch (sta->tx_rate_idx) {
2669 case 0: sta->tx_rate = 10; break;
2670 case 1: sta->tx_rate = 20; break;
2671 case 2: sta->tx_rate = 55; break;
2672 case 3: sta->tx_rate = 110; break;
2673 default: sta->tx_rate = 0; break;
2674 }
2675 PDEBUG(DEBUG_AP, "%s: STA " MACSTR " TX rate raised to"
2676 " %d\n", dev->name, MAC2STR(sta->addr),
2677 sta->tx_rate);
2678 }
2679 sta->tx_since_last_failure = 0;
2680 }
2681
2682 return ret;
2683 }
2684
2685
2686 /* Called only from software IRQ. Called for each TX frame prior possible
2687 * encryption and transmit. */
2688 ap_tx_ret hostap_handle_sta_tx(local_info_t *local, struct hostap_tx_data *tx)
2689 {
2690 struct sta_info *sta = NULL;
2691 struct sk_buff *skb = tx->skb;
2692 int set_tim, ret;
2693 struct ieee80211_hdr_4addr *hdr;
2694 struct hostap_skb_tx_data *meta;
2695
2696 meta = (struct hostap_skb_tx_data *) skb->cb;
2697 ret = AP_TX_CONTINUE;
2698 if (local->ap == NULL || skb->len < 10 ||
2699 meta->iface->type == HOSTAP_INTERFACE_STA)
2700 goto out;
2701
2702 hdr = (struct ieee80211_hdr_4addr *) skb->data;
2703
2704 if (hdr->addr1[0] & 0x01) {
2705 /* broadcast/multicast frame - no AP related processing */
2706 goto out;
2707 }
2708
2709 /* unicast packet - check whether destination STA is associated */
2710 spin_lock(&local->ap->sta_table_lock);
2711 sta = ap_get_sta(local->ap, hdr->addr1);
2712 if (sta)
2713 atomic_inc(&sta->users);
2714 spin_unlock(&local->ap->sta_table_lock);
2715
2716 if (local->iw_mode == IW_MODE_MASTER && sta == NULL &&
2717 !(meta->flags & HOSTAP_TX_FLAGS_WDS) &&
2718 meta->iface->type != HOSTAP_INTERFACE_MASTER &&
2719 meta->iface->type != HOSTAP_INTERFACE_AP) {
2720 #if 0
2721 /* This can happen, e.g., when wlan0 is added to a bridge and
2722 * bridging code does not know which port is the correct target
2723 * for a unicast frame. In this case, the packet is send to all
2724 * ports of the bridge. Since this is a valid scenario, do not
2725 * print out any errors here. */
2726 if (net_ratelimit()) {
2727 printk(KERN_DEBUG "AP: drop packet to non-associated "
2728 "STA " MACSTR "\n", MAC2STR(hdr->addr1));
2729 }
2730 #endif
2731 local->ap->tx_drop_nonassoc++;
2732 ret = AP_TX_DROP;
2733 goto out;
2734 }
2735
2736 if (sta == NULL)
2737 goto out;
2738
2739 if (!(sta->flags & WLAN_STA_AUTHORIZED))
2740 ret = AP_TX_CONTINUE_NOT_AUTHORIZED;
2741
2742 /* Set tx_rate if using host-based TX rate control */
2743 if (!local->fw_tx_rate_control)
2744 local->ap->last_tx_rate = meta->rate =
2745 ap_update_sta_tx_rate(sta, local->dev);
2746
2747 if (local->iw_mode != IW_MODE_MASTER)
2748 goto out;
2749
2750 if (!(sta->flags & WLAN_STA_PS))
2751 goto out;
2752
2753 if (meta->flags & HOSTAP_TX_FLAGS_ADD_MOREDATA) {
2754 /* indicate to STA that more frames follow */
2755 hdr->frame_ctl |=
2756 __constant_cpu_to_le16(IEEE80211_FCTL_MOREDATA);
2757 }
2758
2759 if (meta->flags & HOSTAP_TX_FLAGS_BUFFERED_FRAME) {
2760 /* packet was already buffered and now send due to
2761 * PS poll, so do not rebuffer it */
2762 goto out;
2763 }
2764
2765 if (skb_queue_len(&sta->tx_buf) >= STA_MAX_TX_BUFFER) {
2766 PDEBUG(DEBUG_PS, "%s: No more space in STA (" MACSTR ")'s PS "
2767 "mode buffer\n", local->dev->name, MAC2STR(sta->addr));
2768 /* Make sure that TIM is set for the station (it might not be
2769 * after AP wlan hw reset). */
2770 /* FIX: should fix hw reset to restore bits based on STA
2771 * buffer state.. */
2772 hostap_set_tim(local, sta->aid, 1);
2773 sta->flags |= WLAN_STA_TIM;
2774 ret = AP_TX_DROP;
2775 goto out;
2776 }
2777
2778 /* STA in PS mode, buffer frame for later delivery */
2779 set_tim = skb_queue_empty(&sta->tx_buf);
2780 skb_queue_tail(&sta->tx_buf, skb);
2781 /* FIX: could save RX time to skb and expire buffered frames after
2782 * some time if STA does not poll for them */
2783
2784 if (set_tim) {
2785 if (sta->flags & WLAN_STA_TIM)
2786 PDEBUG(DEBUG_PS2, "Re-setting TIM for aid %d\n",
2787 sta->aid);
2788 hostap_set_tim(local, sta->aid, 1);
2789 sta->flags |= WLAN_STA_TIM;
2790 }
2791
2792 ret = AP_TX_BUFFERED;
2793
2794 out:
2795 if (sta != NULL) {
2796 if (ret == AP_TX_CONTINUE ||
2797 ret == AP_TX_CONTINUE_NOT_AUTHORIZED) {
2798 sta->tx_packets++;
2799 sta->tx_bytes += skb->len;
2800 sta->last_tx = jiffies;
2801 }
2802
2803 if ((ret == AP_TX_CONTINUE ||
2804 ret == AP_TX_CONTINUE_NOT_AUTHORIZED) &&
2805 sta->crypt && tx->host_encrypt) {
2806 tx->crypt = sta->crypt;
2807 tx->sta_ptr = sta; /* hostap_handle_sta_release() will
2808 * be called to release sta info
2809 * later */
2810 } else
2811 atomic_dec(&sta->users);
2812 }
2813
2814 return ret;
2815 }
2816
2817
2818 void hostap_handle_sta_release(void *ptr)
2819 {
2820 struct sta_info *sta = ptr;
2821 atomic_dec(&sta->users);
2822 }
2823
2824
2825 /* Called only as a tasklet (software IRQ) */
2826 void hostap_handle_sta_tx_exc(local_info_t *local, struct sk_buff *skb)
2827 {
2828 struct sta_info *sta;
2829 struct ieee80211_hdr_4addr *hdr;
2830 struct hostap_skb_tx_data *meta;
2831
2832 hdr = (struct ieee80211_hdr_4addr *) skb->data;
2833 meta = (struct hostap_skb_tx_data *) skb->cb;
2834
2835 spin_lock(&local->ap->sta_table_lock);
2836 sta = ap_get_sta(local->ap, hdr->addr1);
2837 if (!sta) {
2838 spin_unlock(&local->ap->sta_table_lock);
2839 PDEBUG(DEBUG_AP, "%s: Could not find STA " MACSTR " for this "
2840 "TX error (@%lu)\n",
2841 local->dev->name, MAC2STR(hdr->addr1), jiffies);
2842 return;
2843 }
2844
2845 sta->tx_since_last_failure = 0;
2846 sta->tx_consecutive_exc++;
2847
2848 if (sta->tx_consecutive_exc >= WLAN_RATE_DECREASE_THRESHOLD &&
2849 sta->tx_rate_idx > 0 && meta->rate <= sta->tx_rate) {
2850 /* use next lower rate */
2851 int old, rate;
2852 old = rate = sta->tx_rate_idx;
2853 while (rate > 0) {
2854 rate--;
2855 if (ap_tx_rate_ok(rate, sta, local)) {
2856 sta->tx_rate_idx = rate;
2857 break;
2858 }
2859 }
2860 if (old != sta->tx_rate_idx) {
2861 switch (sta->tx_rate_idx) {
2862 case 0: sta->tx_rate = 10; break;
2863 case 1: sta->tx_rate = 20; break;
2864 case 2: sta->tx_rate = 55; break;
2865 case 3: sta->tx_rate = 110; break;
2866 default: sta->tx_rate = 0; break;
2867 }
2868 PDEBUG(DEBUG_AP, "%s: STA " MACSTR " TX rate lowered "
2869 "to %d\n", local->dev->name, MAC2STR(sta->addr),
2870 sta->tx_rate);
2871 }
2872 sta->tx_consecutive_exc = 0;
2873 }
2874 spin_unlock(&local->ap->sta_table_lock);
2875 }
2876
2877
2878 static void hostap_update_sta_ps2(local_info_t *local, struct sta_info *sta,
2879 int pwrmgt, int type, int stype)
2880 {
2881 if (pwrmgt && !(sta->flags & WLAN_STA_PS)) {
2882 sta->flags |= WLAN_STA_PS;
2883 PDEBUG(DEBUG_PS2, "STA " MACSTR " changed to use PS "
2884 "mode (type=0x%02X, stype=0x%02X)\n",
2885 MAC2STR(sta->addr), type >> 2, stype >> 4);
2886 } else if (!pwrmgt && (sta->flags & WLAN_STA_PS)) {
2887 sta->flags &= ~WLAN_STA_PS;
2888 PDEBUG(DEBUG_PS2, "STA " MACSTR " changed to not use "
2889 "PS mode (type=0x%02X, stype=0x%02X)\n",
2890 MAC2STR(sta->addr), type >> 2, stype >> 4);
2891 if (type != IEEE80211_FTYPE_CTL ||
2892 stype != IEEE80211_STYPE_PSPOLL)
2893 schedule_packet_send(local, sta);
2894 }
2895 }
2896
2897
2898 /* Called only as a tasklet (software IRQ). Called for each RX frame to update
2899 * STA power saving state. pwrmgt is a flag from 802.11 frame_ctl field. */
2900 int hostap_update_sta_ps(local_info_t *local, struct ieee80211_hdr_4addr *hdr)
2901 {
2902 struct sta_info *sta;
2903 u16 fc;
2904
2905 spin_lock(&local->ap->sta_table_lock);
2906 sta = ap_get_sta(local->ap, hdr->addr2);
2907 if (sta)
2908 atomic_inc(&sta->users);
2909 spin_unlock(&local->ap->sta_table_lock);
2910
2911 if (!sta)
2912 return -1;
2913
2914 fc = le16_to_cpu(hdr->frame_ctl);
2915 hostap_update_sta_ps2(local, sta, fc & IEEE80211_FCTL_PM,
2916 WLAN_FC_GET_TYPE(fc), WLAN_FC_GET_STYPE(fc));
2917
2918 atomic_dec(&sta->users);
2919 return 0;
2920 }
2921
2922
2923 /* Called only as a tasklet (software IRQ). Called for each RX frame after
2924 * getting RX header and payload from hardware. */
2925 ap_rx_ret hostap_handle_sta_rx(local_info_t *local, struct net_device *dev,
2926 struct sk_buff *skb,
2927 struct hostap_80211_rx_status *rx_stats,
2928 int wds)
2929 {
2930 int ret;
2931 struct sta_info *sta;
2932 u16 fc, type, stype;
2933 struct ieee80211_hdr_4addr *hdr;
2934
2935 if (local->ap == NULL)
2936 return AP_RX_CONTINUE;
2937
2938 hdr = (struct ieee80211_hdr_4addr *) skb->data;
2939
2940 fc = le16_to_cpu(hdr->frame_ctl);
2941 type = WLAN_FC_GET_TYPE(fc);
2942 stype = WLAN_FC_GET_STYPE(fc);
2943
2944 spin_lock(&local->ap->sta_table_lock);
2945 sta = ap_get_sta(local->ap, hdr->addr2);
2946 if (sta)
2947 atomic_inc(&sta->users);
2948 spin_unlock(&local->ap->sta_table_lock);
2949
2950 if (sta && !(sta->flags & WLAN_STA_AUTHORIZED))
2951 ret = AP_RX_CONTINUE_NOT_AUTHORIZED;
2952 else
2953 ret = AP_RX_CONTINUE;
2954
2955
2956 if (fc & IEEE80211_FCTL_TODS) {
2957 if (!wds && (sta == NULL || !(sta->flags & WLAN_STA_ASSOC))) {
2958 if (local->hostapd) {
2959 prism2_rx_80211(local->apdev, skb, rx_stats,
2960 PRISM2_RX_NON_ASSOC);
2961 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2962 } else {
2963 printk(KERN_DEBUG "%s: dropped received packet"
2964 " from non-associated STA " MACSTR
2965 " (type=0x%02x, subtype=0x%02x)\n",
2966 dev->name, MAC2STR(hdr->addr2),
2967 type >> 2, stype >> 4);
2968 hostap_rx(dev, skb, rx_stats);
2969 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2970 }
2971 ret = AP_RX_EXIT;
2972 goto out;
2973 }
2974 } else if (fc & IEEE80211_FCTL_FROMDS) {
2975 if (!wds) {
2976 /* FromDS frame - not for us; probably
2977 * broadcast/multicast in another BSS - drop */
2978 if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
2979 printk(KERN_DEBUG "Odd.. FromDS packet "
2980 "received with own BSSID\n");
2981 hostap_dump_rx_80211(dev->name, skb, rx_stats);
2982 }
2983 ret = AP_RX_DROP;
2984 goto out;
2985 }
2986 } else if (stype == IEEE80211_STYPE_NULLFUNC && sta == NULL &&
2987 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
2988
2989 if (local->hostapd) {
2990 prism2_rx_80211(local->apdev, skb, rx_stats,
2991 PRISM2_RX_NON_ASSOC);
2992 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2993 } else {
2994 /* At least Lucent f/w seems to send data::nullfunc
2995 * frames with no ToDS flag when the current AP returns
2996 * after being unavailable for some time. Speed up
2997 * re-association by informing the station about it not
2998 * being associated. */
2999 printk(KERN_DEBUG "%s: rejected received nullfunc "
3000 "frame without ToDS from not associated STA "
3001 MACSTR "\n",
3002 dev->name, MAC2STR(hdr->addr2));
3003 hostap_rx(dev, skb, rx_stats);
3004 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
3005 }
3006 ret = AP_RX_EXIT;
3007 goto out;
3008 } else if (stype == IEEE80211_STYPE_NULLFUNC) {
3009 /* At least Lucent cards seem to send periodic nullfunc
3010 * frames with ToDS. Let these through to update SQ
3011 * stats and PS state. Nullfunc frames do not contain
3012 * any data and they will be dropped below. */
3013 } else {
3014 /* If BSSID (Addr3) is foreign, this frame is a normal
3015 * broadcast frame from an IBSS network. Drop it silently.
3016 * If BSSID is own, report the dropping of this frame. */
3017 if (memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
3018 printk(KERN_DEBUG "%s: dropped received packet from "
3019 MACSTR " with no ToDS flag (type=0x%02x, "
3020 "subtype=0x%02x)\n", dev->name,
3021 MAC2STR(hdr->addr2), type >> 2, stype >> 4);
3022 hostap_dump_rx_80211(dev->name, skb, rx_stats);
3023 }
3024 ret = AP_RX_DROP;
3025 goto out;
3026 }
3027
3028 if (sta) {
3029 hostap_update_sta_ps2(local, sta, fc & IEEE80211_FCTL_PM,
3030 type, stype);
3031
3032 sta->rx_packets++;
3033 sta->rx_bytes += skb->len;
3034 sta->last_rx = jiffies;
3035 }
3036
3037 if (local->ap->nullfunc_ack && stype == IEEE80211_STYPE_NULLFUNC &&
3038 fc & IEEE80211_FCTL_TODS) {
3039 if (local->hostapd) {
3040 prism2_rx_80211(local->apdev, skb, rx_stats,
3041 PRISM2_RX_NULLFUNC_ACK);
3042 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
3043 } else {
3044 /* some STA f/w's seem to require control::ACK frame
3045 * for data::nullfunc, but Prism2 f/w 0.8.0 (at least
3046 * from Compaq) does not send this.. Try to generate
3047 * ACK for these frames from the host driver to make
3048 * power saving work with, e.g., Lucent WaveLAN f/w */
3049 hostap_rx(dev, skb, rx_stats);
3050 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
3051 }
3052 ret = AP_RX_EXIT;
3053 goto out;
3054 }
3055
3056 out:
3057 if (sta)
3058 atomic_dec(&sta->users);
3059
3060 return ret;
3061 }
3062
3063
3064 /* Called only as a tasklet (software IRQ) */
3065 int hostap_handle_sta_crypto(local_info_t *local,
3066 struct ieee80211_hdr_4addr *hdr,
3067 struct ieee80211_crypt_data **crypt,
3068 void **sta_ptr)
3069 {
3070 struct sta_info *sta;
3071
3072 spin_lock(&local->ap->sta_table_lock);
3073 sta = ap_get_sta(local->ap, hdr->addr2);
3074 if (sta)
3075 atomic_inc(&sta->users);
3076 spin_unlock(&local->ap->sta_table_lock);
3077
3078 if (!sta)
3079 return -1;
3080
3081 if (sta->crypt) {
3082 *crypt = sta->crypt;
3083 *sta_ptr = sta;
3084 /* hostap_handle_sta_release() will be called to release STA
3085 * info */
3086 } else
3087 atomic_dec(&sta->users);
3088
3089 return 0;
3090 }
3091
3092
3093 /* Called only as a tasklet (software IRQ) */
3094 int hostap_is_sta_assoc(struct ap_data *ap, u8 *sta_addr)
3095 {
3096 struct sta_info *sta;
3097 int ret = 0;
3098
3099 spin_lock(&ap->sta_table_lock);
3100 sta = ap_get_sta(ap, sta_addr);
3101 if (sta != NULL && (sta->flags & WLAN_STA_ASSOC) && !sta->ap)
3102 ret = 1;
3103 spin_unlock(&ap->sta_table_lock);
3104
3105 return ret;
3106 }
3107
3108
3109 /* Called only as a tasklet (software IRQ) */
3110 int hostap_is_sta_authorized(struct ap_data *ap, u8 *sta_addr)
3111 {
3112 struct sta_info *sta;
3113 int ret = 0;
3114
3115 spin_lock(&ap->sta_table_lock);
3116 sta = ap_get_sta(ap, sta_addr);
3117 if (sta != NULL && (sta->flags & WLAN_STA_ASSOC) && !sta->ap &&
3118 ((sta->flags & WLAN_STA_AUTHORIZED) ||
3119 ap->local->ieee_802_1x == 0))
3120 ret = 1;
3121 spin_unlock(&ap->sta_table_lock);
3122
3123 return ret;
3124 }
3125
3126
3127 /* Called only as a tasklet (software IRQ) */
3128 int hostap_add_sta(struct ap_data *ap, u8 *sta_addr)
3129 {
3130 struct sta_info *sta;
3131 int ret = 1;
3132
3133 if (!ap)
3134 return -1;
3135
3136 spin_lock(&ap->sta_table_lock);
3137 sta = ap_get_sta(ap, sta_addr);
3138 if (sta)
3139 ret = 0;
3140 spin_unlock(&ap->sta_table_lock);
3141
3142 if (ret == 1) {
3143 sta = ap_add_sta(ap, sta_addr);
3144 if (!sta)
3145 return -1;
3146 sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
3147 sta->ap = 1;
3148 memset(sta->supported_rates, 0, sizeof(sta->supported_rates));
3149 /* No way of knowing which rates are supported since we did not
3150 * get supported rates element from beacon/assoc req. Assume
3151 * that remote end supports all 802.11b rates. */
3152 sta->supported_rates[0] = 0x82;
3153 sta->supported_rates[1] = 0x84;
3154 sta->supported_rates[2] = 0x0b;
3155 sta->supported_rates[3] = 0x16;
3156 sta->tx_supp_rates = WLAN_RATE_1M | WLAN_RATE_2M |
3157 WLAN_RATE_5M5 | WLAN_RATE_11M;
3158 sta->tx_rate = 110;
3159 sta->tx_max_rate = sta->tx_rate_idx = 3;
3160 }
3161
3162 return ret;
3163 }
3164
3165
3166 /* Called only as a tasklet (software IRQ) */
3167 int hostap_update_rx_stats(struct ap_data *ap,
3168 struct ieee80211_hdr_4addr *hdr,
3169 struct hostap_80211_rx_status *rx_stats)
3170 {
3171 struct sta_info *sta;
3172
3173 if (!ap)
3174 return -1;
3175
3176 spin_lock(&ap->sta_table_lock);
3177 sta = ap_get_sta(ap, hdr->addr2);
3178 if (sta) {
3179 sta->last_rx_silence = rx_stats->noise;
3180 sta->last_rx_signal = rx_stats->signal;
3181 sta->last_rx_rate = rx_stats->rate;
3182 sta->last_rx_updated = IW_QUAL_ALL_UPDATED | IW_QUAL_DBM;
3183 if (rx_stats->rate == 10)
3184 sta->rx_count[0]++;
3185 else if (rx_stats->rate == 20)
3186 sta->rx_count[1]++;
3187 else if (rx_stats->rate == 55)
3188 sta->rx_count[2]++;
3189 else if (rx_stats->rate == 110)
3190 sta->rx_count[3]++;
3191 }
3192 spin_unlock(&ap->sta_table_lock);
3193
3194 return sta ? 0 : -1;
3195 }
3196
3197
3198 void hostap_update_rates(local_info_t *local)
3199 {
3200 struct list_head *ptr;
3201 struct ap_data *ap = local->ap;
3202
3203 if (!ap)
3204 return;
3205
3206 spin_lock_bh(&ap->sta_table_lock);
3207 for (ptr = ap->sta_list.next; ptr != &ap->sta_list; ptr = ptr->next) {
3208 struct sta_info *sta = (struct sta_info *) ptr;
3209 prism2_check_tx_rates(sta);
3210 }
3211 spin_unlock_bh(&ap->sta_table_lock);
3212 }
3213
3214
3215 void * ap_crypt_get_ptrs(struct ap_data *ap, u8 *addr, int permanent,
3216 struct ieee80211_crypt_data ***crypt)
3217 {
3218 struct sta_info *sta;
3219
3220 spin_lock_bh(&ap->sta_table_lock);
3221 sta = ap_get_sta(ap, addr);
3222 if (sta)
3223 atomic_inc(&sta->users);
3224 spin_unlock_bh(&ap->sta_table_lock);
3225
3226 if (!sta && permanent)
3227 sta = ap_add_sta(ap, addr);
3228
3229 if (!sta)
3230 return NULL;
3231
3232 if (permanent)
3233 sta->flags |= WLAN_STA_PERM;
3234
3235 *crypt = &sta->crypt;
3236
3237 return sta;
3238 }
3239
3240
3241 void hostap_add_wds_links(local_info_t *local)
3242 {
3243 struct ap_data *ap = local->ap;
3244 struct list_head *ptr;
3245
3246 spin_lock_bh(&ap->sta_table_lock);
3247 list_for_each(ptr, &ap->sta_list) {
3248 struct sta_info *sta = list_entry(ptr, struct sta_info, list);
3249 if (sta->ap)
3250 hostap_wds_link_oper(local, sta->addr, WDS_ADD);
3251 }
3252 spin_unlock_bh(&ap->sta_table_lock);
3253
3254 schedule_work(&local->ap->wds_oper_queue);
3255 }
3256
3257
3258 void hostap_wds_link_oper(local_info_t *local, u8 *addr, wds_oper_type type)
3259 {
3260 struct wds_oper_data *entry;
3261
3262 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
3263 if (!entry)
3264 return;
3265 memcpy(entry->addr, addr, ETH_ALEN);
3266 entry->type = type;
3267 spin_lock_bh(&local->lock);
3268 entry->next = local->ap->wds_oper_entries;
3269 local->ap->wds_oper_entries = entry;
3270 spin_unlock_bh(&local->lock);
3271
3272 schedule_work(&local->ap->wds_oper_queue);
3273 }
3274
3275
3276 EXPORT_SYMBOL(hostap_init_data);
3277 EXPORT_SYMBOL(hostap_init_ap_proc);
3278 EXPORT_SYMBOL(hostap_free_data);
3279 EXPORT_SYMBOL(hostap_check_sta_fw_version);
3280 EXPORT_SYMBOL(hostap_handle_sta_tx_exc);
3281 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
3282 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
Linux with added FPC-III support