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Add HostAP wireless driver.
[deliverable/linux.git] / drivers / net / wireless / hostap / hostap_ap.c
1 /*
2 * Intersil Prism2 driver with Host AP (software access point) support
3 * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
4 * <jkmaline@cc.hut.fi>
5 * Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi>
6 *
7 * This file is to be included into hostap.c when S/W AP functionality is
8 * compiled.
9 *
10 * AP: FIX:
11 * - if unicast Class 2 (assoc,reassoc,disassoc) frame received from
12 * unauthenticated STA, send deauth. frame (8802.11: 5.5)
13 * - if unicast Class 3 (data with to/from DS,deauth,pspoll) frame received
14 * from authenticated, but unassoc STA, send disassoc frame (8802.11: 5.5)
15 * - if unicast Class 3 received from unauthenticated STA, send deauth. frame
16 * (8802.11: 5.5)
17 */
18
19 static int other_ap_policy[MAX_PARM_DEVICES] = { AP_OTHER_AP_SKIP_ALL,
20 DEF_INTS };
21 module_param_array(other_ap_policy, int, NULL, 0444);
22 MODULE_PARM_DESC(other_ap_policy, "Other AP beacon monitoring policy (0-3)");
23
24 static int ap_max_inactivity[MAX_PARM_DEVICES] = { AP_MAX_INACTIVITY_SEC,
25 DEF_INTS };
26 module_param_array(ap_max_inactivity, int, NULL, 0444);
27 MODULE_PARM_DESC(ap_max_inactivity, "AP timeout (in seconds) for station "
28 "inactivity");
29
30 static int ap_bridge_packets[MAX_PARM_DEVICES] = { 1, DEF_INTS };
31 module_param_array(ap_bridge_packets, int, NULL, 0444);
32 MODULE_PARM_DESC(ap_bridge_packets, "Bridge packets directly between "
33 "stations");
34
35 static int autom_ap_wds[MAX_PARM_DEVICES] = { 0, DEF_INTS };
36 module_param_array(autom_ap_wds, int, NULL, 0444);
37 MODULE_PARM_DESC(autom_ap_wds, "Add WDS connections to other APs "
38 "automatically");
39
40
41 static struct sta_info* ap_get_sta(struct ap_data *ap, u8 *sta);
42 static void hostap_event_expired_sta(struct net_device *dev,
43 struct sta_info *sta);
44 static void handle_add_proc_queue(void *data);
45
46 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
47 static void handle_wds_oper_queue(void *data);
48 static void prism2_send_mgmt(struct net_device *dev,
49 int type, int subtype, char *body,
50 int body_len, u8 *addr, u16 tx_cb_idx);
51 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
52
53
54 #ifndef PRISM2_NO_PROCFS_DEBUG
55 static int ap_debug_proc_read(char *page, char **start, off_t off,
56 int count, int *eof, void *data)
57 {
58 char *p = page;
59 struct ap_data *ap = (struct ap_data *) data;
60
61 if (off != 0) {
62 *eof = 1;
63 return 0;
64 }
65
66 p += sprintf(p, "BridgedUnicastFrames=%u\n", ap->bridged_unicast);
67 p += sprintf(p, "BridgedMulticastFrames=%u\n", ap->bridged_multicast);
68 p += sprintf(p, "max_inactivity=%u\n", ap->max_inactivity / HZ);
69 p += sprintf(p, "bridge_packets=%u\n", ap->bridge_packets);
70 p += sprintf(p, "nullfunc_ack=%u\n", ap->nullfunc_ack);
71 p += sprintf(p, "autom_ap_wds=%u\n", ap->autom_ap_wds);
72 p += sprintf(p, "auth_algs=%u\n", ap->local->auth_algs);
73 p += sprintf(p, "tx_drop_nonassoc=%u\n", ap->tx_drop_nonassoc);
74
75 return (p - page);
76 }
77 #endif /* PRISM2_NO_PROCFS_DEBUG */
78
79
80 static void ap_sta_hash_add(struct ap_data *ap, struct sta_info *sta)
81 {
82 sta->hnext = ap->sta_hash[STA_HASH(sta->addr)];
83 ap->sta_hash[STA_HASH(sta->addr)] = sta;
84 }
85
86 static void ap_sta_hash_del(struct ap_data *ap, struct sta_info *sta)
87 {
88 struct sta_info *s;
89
90 s = ap->sta_hash[STA_HASH(sta->addr)];
91 if (s == NULL) return;
92 if (memcmp(s->addr, sta->addr, ETH_ALEN) == 0) {
93 ap->sta_hash[STA_HASH(sta->addr)] = s->hnext;
94 return;
95 }
96
97 while (s->hnext != NULL && memcmp(s->hnext->addr, sta->addr, ETH_ALEN)
98 != 0)
99 s = s->hnext;
100 if (s->hnext != NULL)
101 s->hnext = s->hnext->hnext;
102 else
103 printk("AP: could not remove STA " MACSTR " from hash table\n",
104 MAC2STR(sta->addr));
105 }
106
107 static void ap_free_sta(struct ap_data *ap, struct sta_info *sta)
108 {
109 if (sta->ap && sta->local)
110 hostap_event_expired_sta(sta->local->dev, sta);
111
112 if (ap->proc != NULL) {
113 char name[20];
114 sprintf(name, MACSTR, MAC2STR(sta->addr));
115 remove_proc_entry(name, ap->proc);
116 }
117
118 if (sta->crypt) {
119 sta->crypt->ops->deinit(sta->crypt->priv);
120 kfree(sta->crypt);
121 sta->crypt = NULL;
122 }
123
124 skb_queue_purge(&sta->tx_buf);
125
126 ap->num_sta--;
127 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
128 if (sta->aid > 0)
129 ap->sta_aid[sta->aid - 1] = NULL;
130
131 if (!sta->ap && sta->u.sta.challenge)
132 kfree(sta->u.sta.challenge);
133 del_timer(&sta->timer);
134 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
135
136 kfree(sta);
137 }
138
139
140 static void hostap_set_tim(local_info_t *local, int aid, int set)
141 {
142 if (local->func->set_tim)
143 local->func->set_tim(local->dev, aid, set);
144 }
145
146
147 static void hostap_event_new_sta(struct net_device *dev, struct sta_info *sta)
148 {
149 union iwreq_data wrqu;
150 memset(&wrqu, 0, sizeof(wrqu));
151 memcpy(wrqu.addr.sa_data, sta->addr, ETH_ALEN);
152 wrqu.addr.sa_family = ARPHRD_ETHER;
153 wireless_send_event(dev, IWEVREGISTERED, &wrqu, NULL);
154 }
155
156
157 static void hostap_event_expired_sta(struct net_device *dev,
158 struct sta_info *sta)
159 {
160 union iwreq_data wrqu;
161 memset(&wrqu, 0, sizeof(wrqu));
162 memcpy(wrqu.addr.sa_data, sta->addr, ETH_ALEN);
163 wrqu.addr.sa_family = ARPHRD_ETHER;
164 wireless_send_event(dev, IWEVEXPIRED, &wrqu, NULL);
165 }
166
167
168 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
169
170 static void ap_handle_timer(unsigned long data)
171 {
172 struct sta_info *sta = (struct sta_info *) data;
173 local_info_t *local;
174 struct ap_data *ap;
175 unsigned long next_time = 0;
176 int was_assoc;
177
178 if (sta == NULL || sta->local == NULL || sta->local->ap == NULL) {
179 PDEBUG(DEBUG_AP, "ap_handle_timer() called with NULL data\n");
180 return;
181 }
182
183 local = sta->local;
184 ap = local->ap;
185 was_assoc = sta->flags & WLAN_STA_ASSOC;
186
187 if (atomic_read(&sta->users) != 0)
188 next_time = jiffies + HZ;
189 else if ((sta->flags & WLAN_STA_PERM) && !(sta->flags & WLAN_STA_AUTH))
190 next_time = jiffies + ap->max_inactivity;
191
192 if (time_before(jiffies, sta->last_rx + ap->max_inactivity)) {
193 /* station activity detected; reset timeout state */
194 sta->timeout_next = STA_NULLFUNC;
195 next_time = sta->last_rx + ap->max_inactivity;
196 } else if (sta->timeout_next == STA_DISASSOC &&
197 !(sta->flags & WLAN_STA_PENDING_POLL)) {
198 /* STA ACKed data nullfunc frame poll */
199 sta->timeout_next = STA_NULLFUNC;
200 next_time = jiffies + ap->max_inactivity;
201 }
202
203 if (next_time) {
204 sta->timer.expires = next_time;
205 add_timer(&sta->timer);
206 return;
207 }
208
209 if (sta->ap)
210 sta->timeout_next = STA_DEAUTH;
211
212 if (sta->timeout_next == STA_DEAUTH && !(sta->flags & WLAN_STA_PERM)) {
213 spin_lock(&ap->sta_table_lock);
214 ap_sta_hash_del(ap, sta);
215 list_del(&sta->list);
216 spin_unlock(&ap->sta_table_lock);
217 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
218 } else if (sta->timeout_next == STA_DISASSOC)
219 sta->flags &= ~WLAN_STA_ASSOC;
220
221 if (was_assoc && !(sta->flags & WLAN_STA_ASSOC) && !sta->ap)
222 hostap_event_expired_sta(local->dev, sta);
223
224 if (sta->timeout_next == STA_DEAUTH && sta->aid > 0 &&
225 !skb_queue_empty(&sta->tx_buf)) {
226 hostap_set_tim(local, sta->aid, 0);
227 sta->flags &= ~WLAN_STA_TIM;
228 }
229
230 if (sta->ap) {
231 if (ap->autom_ap_wds) {
232 PDEBUG(DEBUG_AP, "%s: removing automatic WDS "
233 "connection to AP " MACSTR "\n",
234 local->dev->name, MAC2STR(sta->addr));
235 hostap_wds_link_oper(local, sta->addr, WDS_DEL);
236 }
237 } else if (sta->timeout_next == STA_NULLFUNC) {
238 /* send data frame to poll STA and check whether this frame
239 * is ACKed */
240 /* FIX: WLAN_FC_STYPE_NULLFUNC would be more appropriate, but
241 * it is apparently not retried so TX Exc events are not
242 * received for it */
243 sta->flags |= WLAN_STA_PENDING_POLL;
244 prism2_send_mgmt(local->dev, WLAN_FC_TYPE_DATA,
245 WLAN_FC_STYPE_DATA, NULL, 0,
246 sta->addr, ap->tx_callback_poll);
247 } else {
248 int deauth = sta->timeout_next == STA_DEAUTH;
249 u16 resp;
250 PDEBUG(DEBUG_AP, "%s: sending %s info to STA " MACSTR
251 "(last=%lu, jiffies=%lu)\n",
252 local->dev->name,
253 deauth ? "deauthentication" : "disassociation",
254 MAC2STR(sta->addr), sta->last_rx, jiffies);
255
256 resp = cpu_to_le16(deauth ? WLAN_REASON_PREV_AUTH_NOT_VALID :
257 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
258 prism2_send_mgmt(local->dev, WLAN_FC_TYPE_MGMT,
259 (deauth ? WLAN_FC_STYPE_DEAUTH :
260 WLAN_FC_STYPE_DISASSOC),
261 (char *) &resp, 2, sta->addr, 0);
262 }
263
264 if (sta->timeout_next == STA_DEAUTH) {
265 if (sta->flags & WLAN_STA_PERM) {
266 PDEBUG(DEBUG_AP, "%s: STA " MACSTR " would have been "
267 "removed, but it has 'perm' flag\n",
268 local->dev->name, MAC2STR(sta->addr));
269 } else
270 ap_free_sta(ap, sta);
271 return;
272 }
273
274 if (sta->timeout_next == STA_NULLFUNC) {
275 sta->timeout_next = STA_DISASSOC;
276 sta->timer.expires = jiffies + AP_DISASSOC_DELAY;
277 } else {
278 sta->timeout_next = STA_DEAUTH;
279 sta->timer.expires = jiffies + AP_DEAUTH_DELAY;
280 }
281
282 add_timer(&sta->timer);
283 }
284
285
286 void hostap_deauth_all_stas(struct net_device *dev, struct ap_data *ap,
287 int resend)
288 {
289 u8 addr[ETH_ALEN];
290 u16 resp;
291 int i;
292
293 PDEBUG(DEBUG_AP, "%s: Deauthenticate all stations\n", dev->name);
294 memset(addr, 0xff, ETH_ALEN);
295
296 resp = __constant_cpu_to_le16(WLAN_REASON_PREV_AUTH_NOT_VALID);
297
298 /* deauth message sent; try to resend it few times; the message is
299 * broadcast, so it may be delayed until next DTIM; there is not much
300 * else we can do at this point since the driver is going to be shut
301 * down */
302 for (i = 0; i < 5; i++) {
303 prism2_send_mgmt(dev, WLAN_FC_TYPE_MGMT, WLAN_FC_STYPE_DEAUTH,
304 (char *) &resp, 2, addr, 0);
305
306 if (!resend || ap->num_sta <= 0)
307 return;
308
309 mdelay(50);
310 }
311 }
312
313
314 static int ap_control_proc_read(char *page, char **start, off_t off,
315 int count, int *eof, void *data)
316 {
317 char *p = page;
318 struct ap_data *ap = (struct ap_data *) data;
319 char *policy_txt;
320 struct list_head *ptr;
321 struct mac_entry *entry;
322
323 if (off != 0) {
324 *eof = 1;
325 return 0;
326 }
327
328 switch (ap->mac_restrictions.policy) {
329 case MAC_POLICY_OPEN:
330 policy_txt = "open";
331 break;
332 case MAC_POLICY_ALLOW:
333 policy_txt = "allow";
334 break;
335 case MAC_POLICY_DENY:
336 policy_txt = "deny";
337 break;
338 default:
339 policy_txt = "unknown";
340 break;
341 };
342 p += sprintf(p, "MAC policy: %s\n", policy_txt);
343 p += sprintf(p, "MAC entries: %u\n", ap->mac_restrictions.entries);
344 p += sprintf(p, "MAC list:\n");
345 spin_lock_bh(&ap->mac_restrictions.lock);
346 for (ptr = ap->mac_restrictions.mac_list.next;
347 ptr != &ap->mac_restrictions.mac_list; ptr = ptr->next) {
348 if (p - page > PAGE_SIZE - 80) {
349 p += sprintf(p, "All entries did not fit one page.\n");
350 break;
351 }
352
353 entry = list_entry(ptr, struct mac_entry, list);
354 p += sprintf(p, MACSTR "\n", MAC2STR(entry->addr));
355 }
356 spin_unlock_bh(&ap->mac_restrictions.lock);
357
358 return (p - page);
359 }
360
361
362 static int ap_control_add_mac(struct mac_restrictions *mac_restrictions,
363 u8 *mac)
364 {
365 struct mac_entry *entry;
366
367 entry = kmalloc(sizeof(struct mac_entry), GFP_KERNEL);
368 if (entry == NULL)
369 return -1;
370
371 memcpy(entry->addr, mac, ETH_ALEN);
372
373 spin_lock_bh(&mac_restrictions->lock);
374 list_add_tail(&entry->list, &mac_restrictions->mac_list);
375 mac_restrictions->entries++;
376 spin_unlock_bh(&mac_restrictions->lock);
377
378 return 0;
379 }
380
381
382 static int ap_control_del_mac(struct mac_restrictions *mac_restrictions,
383 u8 *mac)
384 {
385 struct list_head *ptr;
386 struct mac_entry *entry;
387
388 spin_lock_bh(&mac_restrictions->lock);
389 for (ptr = mac_restrictions->mac_list.next;
390 ptr != &mac_restrictions->mac_list; ptr = ptr->next) {
391 entry = list_entry(ptr, struct mac_entry, list);
392
393 if (memcmp(entry->addr, mac, ETH_ALEN) == 0) {
394 list_del(ptr);
395 kfree(entry);
396 mac_restrictions->entries--;
397 spin_unlock_bh(&mac_restrictions->lock);
398 return 0;
399 }
400 }
401 spin_unlock_bh(&mac_restrictions->lock);
402 return -1;
403 }
404
405
406 static int ap_control_mac_deny(struct mac_restrictions *mac_restrictions,
407 u8 *mac)
408 {
409 struct list_head *ptr;
410 struct mac_entry *entry;
411 int found = 0;
412
413 if (mac_restrictions->policy == MAC_POLICY_OPEN)
414 return 0;
415
416 spin_lock_bh(&mac_restrictions->lock);
417 for (ptr = mac_restrictions->mac_list.next;
418 ptr != &mac_restrictions->mac_list; ptr = ptr->next) {
419 entry = list_entry(ptr, struct mac_entry, list);
420
421 if (memcmp(entry->addr, mac, ETH_ALEN) == 0) {
422 found = 1;
423 break;
424 }
425 }
426 spin_unlock_bh(&mac_restrictions->lock);
427
428 if (mac_restrictions->policy == MAC_POLICY_ALLOW)
429 return !found;
430 else
431 return found;
432 }
433
434
435 static void ap_control_flush_macs(struct mac_restrictions *mac_restrictions)
436 {
437 struct list_head *ptr, *n;
438 struct mac_entry *entry;
439
440 if (mac_restrictions->entries == 0)
441 return;
442
443 spin_lock_bh(&mac_restrictions->lock);
444 for (ptr = mac_restrictions->mac_list.next, n = ptr->next;
445 ptr != &mac_restrictions->mac_list;
446 ptr = n, n = ptr->next) {
447 entry = list_entry(ptr, struct mac_entry, list);
448 list_del(ptr);
449 kfree(entry);
450 }
451 mac_restrictions->entries = 0;
452 spin_unlock_bh(&mac_restrictions->lock);
453 }
454
455
456 static int ap_control_kick_mac(struct ap_data *ap, struct net_device *dev,
457 u8 *mac)
458 {
459 struct sta_info *sta;
460 u16 resp;
461
462 spin_lock_bh(&ap->sta_table_lock);
463 sta = ap_get_sta(ap, mac);
464 if (sta) {
465 ap_sta_hash_del(ap, sta);
466 list_del(&sta->list);
467 }
468 spin_unlock_bh(&ap->sta_table_lock);
469
470 if (!sta)
471 return -EINVAL;
472
473 resp = cpu_to_le16(WLAN_REASON_PREV_AUTH_NOT_VALID);
474 prism2_send_mgmt(dev, WLAN_FC_TYPE_MGMT, WLAN_FC_STYPE_DEAUTH,
475 (char *) &resp, 2, sta->addr, 0);
476
477 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap)
478 hostap_event_expired_sta(dev, sta);
479
480 ap_free_sta(ap, sta);
481
482 return 0;
483 }
484
485 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
486
487
488 static void ap_control_kickall(struct ap_data *ap)
489 {
490 struct list_head *ptr, *n;
491 struct sta_info *sta;
492
493 spin_lock_bh(&ap->sta_table_lock);
494 for (ptr = ap->sta_list.next, n = ptr->next; ptr != &ap->sta_list;
495 ptr = n, n = ptr->next) {
496 sta = list_entry(ptr, struct sta_info, list);
497 ap_sta_hash_del(ap, sta);
498 list_del(&sta->list);
499 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
500 hostap_event_expired_sta(sta->local->dev, sta);
501 ap_free_sta(ap, sta);
502 }
503 spin_unlock_bh(&ap->sta_table_lock);
504 }
505
506
507 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
508
509 #define PROC_LIMIT (PAGE_SIZE - 80)
510
511 static int prism2_ap_proc_read(char *page, char **start, off_t off,
512 int count, int *eof, void *data)
513 {
514 char *p = page;
515 struct ap_data *ap = (struct ap_data *) data;
516 struct list_head *ptr;
517 int i;
518
519 if (off > PROC_LIMIT) {
520 *eof = 1;
521 return 0;
522 }
523
524 p += sprintf(p, "# BSSID CHAN SIGNAL NOISE RATE SSID FLAGS\n");
525 spin_lock_bh(&ap->sta_table_lock);
526 for (ptr = ap->sta_list.next; ptr != &ap->sta_list; ptr = ptr->next) {
527 struct sta_info *sta = (struct sta_info *) ptr;
528
529 if (!sta->ap)
530 continue;
531
532 p += sprintf(p, MACSTR " %d %d %d %d '", MAC2STR(sta->addr),
533 sta->u.ap.channel, sta->last_rx_signal,
534 sta->last_rx_silence, sta->last_rx_rate);
535 for (i = 0; i < sta->u.ap.ssid_len; i++)
536 p += sprintf(p, ((sta->u.ap.ssid[i] >= 32 &&
537 sta->u.ap.ssid[i] < 127) ?
538 "%c" : "<%02x>"),
539 sta->u.ap.ssid[i]);
540 p += sprintf(p, "'");
541 if (sta->capability & WLAN_CAPABILITY_ESS)
542 p += sprintf(p, " [ESS]");
543 if (sta->capability & WLAN_CAPABILITY_IBSS)
544 p += sprintf(p, " [IBSS]");
545 if (sta->capability & WLAN_CAPABILITY_PRIVACY)
546 p += sprintf(p, " [WEP]");
547 p += sprintf(p, "\n");
548
549 if ((p - page) > PROC_LIMIT) {
550 printk(KERN_DEBUG "hostap: ap proc did not fit\n");
551 break;
552 }
553 }
554 spin_unlock_bh(&ap->sta_table_lock);
555
556 if ((p - page) <= off) {
557 *eof = 1;
558 return 0;
559 }
560
561 *start = page + off;
562
563 return (p - page - off);
564 }
565 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
566
567
568 void hostap_check_sta_fw_version(struct ap_data *ap, int sta_fw_ver)
569 {
570 if (!ap)
571 return;
572
573 if (sta_fw_ver == PRISM2_FW_VER(0,8,0)) {
574 PDEBUG(DEBUG_AP, "Using data::nullfunc ACK workaround - "
575 "firmware upgrade recommended\n");
576 ap->nullfunc_ack = 1;
577 } else
578 ap->nullfunc_ack = 0;
579
580 if (sta_fw_ver == PRISM2_FW_VER(1,4,2)) {
581 printk(KERN_WARNING "%s: Warning: secondary station firmware "
582 "version 1.4.2 does not seem to work in Host AP mode\n",
583 ap->local->dev->name);
584 }
585 }
586
587
588 /* Called only as a tasklet (software IRQ) */
589 static void hostap_ap_tx_cb(struct sk_buff *skb, int ok, void *data)
590 {
591 struct ap_data *ap = data;
592 u16 fc;
593 struct hostap_ieee80211_hdr *hdr;
594
595 if (!ap->local->hostapd || !ap->local->apdev) {
596 dev_kfree_skb(skb);
597 return;
598 }
599
600 hdr = (struct hostap_ieee80211_hdr *) skb->data;
601 fc = le16_to_cpu(hdr->frame_control);
602
603 /* Pass the TX callback frame to the hostapd; use 802.11 header version
604 * 1 to indicate failure (no ACK) and 2 success (frame ACKed) */
605
606 fc &= ~WLAN_FC_PVER;
607 fc |= ok ? BIT(1) : BIT(0);
608 hdr->frame_control = cpu_to_le16(fc);
609
610 skb->dev = ap->local->apdev;
611 skb_pull(skb, hostap_80211_get_hdrlen(fc));
612 skb->pkt_type = PACKET_OTHERHOST;
613 skb->protocol = __constant_htons(ETH_P_802_2);
614 memset(skb->cb, 0, sizeof(skb->cb));
615 netif_rx(skb);
616 }
617
618
619 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
620 /* Called only as a tasklet (software IRQ) */
621 static void hostap_ap_tx_cb_auth(struct sk_buff *skb, int ok, void *data)
622 {
623 struct ap_data *ap = data;
624 struct net_device *dev = ap->local->dev;
625 struct hostap_ieee80211_hdr *hdr;
626 u16 fc, *pos, auth_alg, auth_transaction, status;
627 struct sta_info *sta = NULL;
628 char *txt = NULL;
629
630 if (ap->local->hostapd) {
631 dev_kfree_skb(skb);
632 return;
633 }
634
635 hdr = (struct hostap_ieee80211_hdr *) skb->data;
636 fc = le16_to_cpu(hdr->frame_control);
637 if (WLAN_FC_GET_TYPE(fc) != WLAN_FC_TYPE_MGMT ||
638 WLAN_FC_GET_STYPE(fc) != WLAN_FC_STYPE_AUTH ||
639 skb->len < IEEE80211_MGMT_HDR_LEN + 6) {
640 printk(KERN_DEBUG "%s: hostap_ap_tx_cb_auth received invalid "
641 "frame\n", dev->name);
642 dev_kfree_skb(skb);
643 return;
644 }
645
646 pos = (u16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
647 auth_alg = le16_to_cpu(*pos++);
648 auth_transaction = le16_to_cpu(*pos++);
649 status = le16_to_cpu(*pos++);
650
651 if (!ok) {
652 txt = "frame was not ACKed";
653 goto done;
654 }
655
656 spin_lock(&ap->sta_table_lock);
657 sta = ap_get_sta(ap, hdr->addr1);
658 if (sta)
659 atomic_inc(&sta->users);
660 spin_unlock(&ap->sta_table_lock);
661
662 if (!sta) {
663 txt = "STA not found";
664 goto done;
665 }
666
667 if (status == WLAN_STATUS_SUCCESS &&
668 ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 2) ||
669 (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 4))) {
670 txt = "STA authenticated";
671 sta->flags |= WLAN_STA_AUTH;
672 sta->last_auth = jiffies;
673 } else if (status != WLAN_STATUS_SUCCESS)
674 txt = "authentication failed";
675
676 done:
677 if (sta)
678 atomic_dec(&sta->users);
679 if (txt) {
680 PDEBUG(DEBUG_AP, "%s: " MACSTR " auth_cb - alg=%d trans#=%d "
681 "status=%d - %s\n",
682 dev->name, MAC2STR(hdr->addr1), auth_alg,
683 auth_transaction, status, txt);
684 }
685 dev_kfree_skb(skb);
686 }
687
688
689 /* Called only as a tasklet (software IRQ) */
690 static void hostap_ap_tx_cb_assoc(struct sk_buff *skb, int ok, void *data)
691 {
692 struct ap_data *ap = data;
693 struct net_device *dev = ap->local->dev;
694 struct hostap_ieee80211_hdr *hdr;
695 u16 fc, *pos, status;
696 struct sta_info *sta = NULL;
697 char *txt = NULL;
698
699 if (ap->local->hostapd) {
700 dev_kfree_skb(skb);
701 return;
702 }
703
704 hdr = (struct hostap_ieee80211_hdr *) skb->data;
705 fc = le16_to_cpu(hdr->frame_control);
706 if (WLAN_FC_GET_TYPE(fc) != WLAN_FC_TYPE_MGMT ||
707 (WLAN_FC_GET_STYPE(fc) != WLAN_FC_STYPE_ASSOC_RESP &&
708 WLAN_FC_GET_STYPE(fc) != WLAN_FC_STYPE_REASSOC_RESP) ||
709 skb->len < IEEE80211_MGMT_HDR_LEN + 4) {
710 printk(KERN_DEBUG "%s: hostap_ap_tx_cb_assoc received invalid "
711 "frame\n", dev->name);
712 dev_kfree_skb(skb);
713 return;
714 }
715
716 if (!ok) {
717 txt = "frame was not ACKed";
718 goto done;
719 }
720
721 spin_lock(&ap->sta_table_lock);
722 sta = ap_get_sta(ap, hdr->addr1);
723 if (sta)
724 atomic_inc(&sta->users);
725 spin_unlock(&ap->sta_table_lock);
726
727 if (!sta) {
728 txt = "STA not found";
729 goto done;
730 }
731
732 pos = (u16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
733 pos++;
734 status = le16_to_cpu(*pos++);
735 if (status == WLAN_STATUS_SUCCESS) {
736 if (!(sta->flags & WLAN_STA_ASSOC))
737 hostap_event_new_sta(dev, sta);
738 txt = "STA associated";
739 sta->flags |= WLAN_STA_ASSOC;
740 sta->last_assoc = jiffies;
741 } else
742 txt = "association failed";
743
744 done:
745 if (sta)
746 atomic_dec(&sta->users);
747 if (txt) {
748 PDEBUG(DEBUG_AP, "%s: " MACSTR " assoc_cb - %s\n",
749 dev->name, MAC2STR(hdr->addr1), txt);
750 }
751 dev_kfree_skb(skb);
752 }
753
754 /* Called only as a tasklet (software IRQ); TX callback for poll frames used
755 * in verifying whether the STA is still present. */
756 static void hostap_ap_tx_cb_poll(struct sk_buff *skb, int ok, void *data)
757 {
758 struct ap_data *ap = data;
759 struct hostap_ieee80211_hdr *hdr;
760 struct sta_info *sta;
761
762 if (skb->len < 24)
763 goto fail;
764 hdr = (struct hostap_ieee80211_hdr *) skb->data;
765 if (ok) {
766 spin_lock(&ap->sta_table_lock);
767 sta = ap_get_sta(ap, hdr->addr1);
768 if (sta)
769 sta->flags &= ~WLAN_STA_PENDING_POLL;
770 spin_unlock(&ap->sta_table_lock);
771 } else {
772 PDEBUG(DEBUG_AP, "%s: STA " MACSTR " did not ACK activity "
773 "poll frame\n", ap->local->dev->name,
774 MAC2STR(hdr->addr1));
775 }
776
777 fail:
778 dev_kfree_skb(skb);
779 }
780 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
781
782
783 void hostap_init_data(local_info_t *local)
784 {
785 struct ap_data *ap = local->ap;
786
787 if (ap == NULL) {
788 printk(KERN_WARNING "hostap_init_data: ap == NULL\n");
789 return;
790 }
791 memset(ap, 0, sizeof(struct ap_data));
792 ap->local = local;
793
794 ap->ap_policy = GET_INT_PARM(other_ap_policy, local->card_idx);
795 ap->bridge_packets = GET_INT_PARM(ap_bridge_packets, local->card_idx);
796 ap->max_inactivity =
797 GET_INT_PARM(ap_max_inactivity, local->card_idx) * HZ;
798 ap->autom_ap_wds = GET_INT_PARM(autom_ap_wds, local->card_idx);
799
800 spin_lock_init(&ap->sta_table_lock);
801 INIT_LIST_HEAD(&ap->sta_list);
802
803 /* Initialize task queue structure for AP management */
804 INIT_WORK(&local->ap->add_sta_proc_queue, handle_add_proc_queue, ap);
805
806 ap->tx_callback_idx =
807 hostap_tx_callback_register(local, hostap_ap_tx_cb, ap);
808 if (ap->tx_callback_idx == 0)
809 printk(KERN_WARNING "%s: failed to register TX callback for "
810 "AP\n", local->dev->name);
811 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
812 INIT_WORK(&local->ap->wds_oper_queue, handle_wds_oper_queue, local);
813
814 ap->tx_callback_auth =
815 hostap_tx_callback_register(local, hostap_ap_tx_cb_auth, ap);
816 ap->tx_callback_assoc =
817 hostap_tx_callback_register(local, hostap_ap_tx_cb_assoc, ap);
818 ap->tx_callback_poll =
819 hostap_tx_callback_register(local, hostap_ap_tx_cb_poll, ap);
820 if (ap->tx_callback_auth == 0 || ap->tx_callback_assoc == 0 ||
821 ap->tx_callback_poll == 0)
822 printk(KERN_WARNING "%s: failed to register TX callback for "
823 "AP\n", local->dev->name);
824
825 spin_lock_init(&ap->mac_restrictions.lock);
826 INIT_LIST_HEAD(&ap->mac_restrictions.mac_list);
827 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
828
829 ap->initialized = 1;
830 }
831
832
833 void hostap_init_ap_proc(local_info_t *local)
834 {
835 struct ap_data *ap = local->ap;
836
837 ap->proc = local->proc;
838 if (ap->proc == NULL)
839 return;
840
841 #ifndef PRISM2_NO_PROCFS_DEBUG
842 create_proc_read_entry("ap_debug", 0, ap->proc,
843 ap_debug_proc_read, ap);
844 #endif /* PRISM2_NO_PROCFS_DEBUG */
845
846 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
847 create_proc_read_entry("ap_control", 0, ap->proc,
848 ap_control_proc_read, ap);
849 create_proc_read_entry("ap", 0, ap->proc,
850 prism2_ap_proc_read, ap);
851 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
852
853 }
854
855
856 void hostap_free_data(struct ap_data *ap)
857 {
858 struct list_head *n, *ptr;
859
860 if (ap == NULL || !ap->initialized) {
861 printk(KERN_DEBUG "hostap_free_data: ap has not yet been "
862 "initialized - skip resource freeing\n");
863 return;
864 }
865
866 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
867 if (ap->crypt)
868 ap->crypt->deinit(ap->crypt_priv);
869 ap->crypt = ap->crypt_priv = NULL;
870 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
871
872 list_for_each_safe(ptr, n, &ap->sta_list) {
873 struct sta_info *sta = list_entry(ptr, struct sta_info, list);
874 ap_sta_hash_del(ap, sta);
875 list_del(&sta->list);
876 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
877 hostap_event_expired_sta(sta->local->dev, sta);
878 ap_free_sta(ap, sta);
879 }
880
881 #ifndef PRISM2_NO_PROCFS_DEBUG
882 if (ap->proc != NULL) {
883 remove_proc_entry("ap_debug", ap->proc);
884 }
885 #endif /* PRISM2_NO_PROCFS_DEBUG */
886
887 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
888 if (ap->proc != NULL) {
889 remove_proc_entry("ap", ap->proc);
890 remove_proc_entry("ap_control", ap->proc);
891 }
892 ap_control_flush_macs(&ap->mac_restrictions);
893 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
894
895 ap->initialized = 0;
896 }
897
898
899 /* caller should have mutex for AP STA list handling */
900 static struct sta_info* ap_get_sta(struct ap_data *ap, u8 *sta)
901 {
902 struct sta_info *s;
903
904 s = ap->sta_hash[STA_HASH(sta)];
905 while (s != NULL && memcmp(s->addr, sta, ETH_ALEN) != 0)
906 s = s->hnext;
907 return s;
908 }
909
910
911 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
912
913 /* Called from timer handler and from scheduled AP queue handlers */
914 static void prism2_send_mgmt(struct net_device *dev,
915 int type, int subtype, char *body,
916 int body_len, u8 *addr, u16 tx_cb_idx)
917 {
918 struct hostap_interface *iface;
919 local_info_t *local;
920 struct hostap_ieee80211_hdr *hdr;
921 u16 fc;
922 struct sk_buff *skb;
923 struct hostap_skb_tx_data *meta;
924 int hdrlen;
925
926 iface = netdev_priv(dev);
927 local = iface->local;
928 dev = local->dev; /* always use master radio device */
929 iface = netdev_priv(dev);
930
931 if (!(dev->flags & IFF_UP)) {
932 PDEBUG(DEBUG_AP, "%s: prism2_send_mgmt - device is not UP - "
933 "cannot send frame\n", dev->name);
934 return;
935 }
936
937 skb = dev_alloc_skb(sizeof(*hdr) + body_len);
938 if (skb == NULL) {
939 PDEBUG(DEBUG_AP, "%s: prism2_send_mgmt failed to allocate "
940 "skb\n", dev->name);
941 return;
942 }
943
944 fc = (type << 2) | (subtype << 4);
945 hdrlen = hostap_80211_get_hdrlen(fc);
946 hdr = (struct hostap_ieee80211_hdr *) skb_put(skb, hdrlen);
947 if (body)
948 memcpy(skb_put(skb, body_len), body, body_len);
949
950 memset(hdr, 0, hdrlen);
951
952 /* FIX: ctrl::ack sending used special HFA384X_TX_CTRL_802_11
953 * tx_control instead of using local->tx_control */
954
955
956 memcpy(hdr->addr1, addr, ETH_ALEN); /* DA / RA */
957 if (type == WLAN_FC_TYPE_DATA) {
958 fc |= WLAN_FC_FROMDS;
959 memcpy(hdr->addr2, dev->dev_addr, ETH_ALEN); /* BSSID */
960 memcpy(hdr->addr3, dev->dev_addr, ETH_ALEN); /* SA */
961 } else if (type == WLAN_FC_TYPE_CTRL) {
962 /* control:ACK does not have addr2 or addr3 */
963 memset(hdr->addr2, 0, ETH_ALEN);
964 memset(hdr->addr3, 0, ETH_ALEN);
965 } else {
966 memcpy(hdr->addr2, dev->dev_addr, ETH_ALEN); /* SA */
967 memcpy(hdr->addr3, dev->dev_addr, ETH_ALEN); /* BSSID */
968 }
969
970 hdr->frame_control = cpu_to_le16(fc);
971
972 meta = (struct hostap_skb_tx_data *) skb->cb;
973 memset(meta, 0, sizeof(*meta));
974 meta->magic = HOSTAP_SKB_TX_DATA_MAGIC;
975 meta->iface = iface;
976 meta->tx_cb_idx = tx_cb_idx;
977
978 skb->dev = dev;
979 skb->mac.raw = skb->nh.raw = skb->data;
980 dev_queue_xmit(skb);
981 }
982 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
983
984
985 static int prism2_sta_proc_read(char *page, char **start, off_t off,
986 int count, int *eof, void *data)
987 {
988 char *p = page;
989 struct sta_info *sta = (struct sta_info *) data;
990 int i;
991
992 /* FIX: possible race condition.. the STA data could have just expired,
993 * but proc entry was still here so that the read could have started;
994 * some locking should be done here.. */
995
996 if (off != 0) {
997 *eof = 1;
998 return 0;
999 }
1000
1001 p += sprintf(p, "%s=" MACSTR "\nusers=%d\naid=%d\n"
1002 "flags=0x%04x%s%s%s%s%s%s%s\n"
1003 "capability=0x%02x\nlisten_interval=%d\nsupported_rates=",
1004 sta->ap ? "AP" : "STA",
1005 MAC2STR(sta->addr), atomic_read(&sta->users), sta->aid,
1006 sta->flags,
1007 sta->flags & WLAN_STA_AUTH ? " AUTH" : "",
1008 sta->flags & WLAN_STA_ASSOC ? " ASSOC" : "",
1009 sta->flags & WLAN_STA_PS ? " PS" : "",
1010 sta->flags & WLAN_STA_TIM ? " TIM" : "",
1011 sta->flags & WLAN_STA_PERM ? " PERM" : "",
1012 sta->flags & WLAN_STA_AUTHORIZED ? " AUTHORIZED" : "",
1013 sta->flags & WLAN_STA_PENDING_POLL ? " POLL" : "",
1014 sta->capability, sta->listen_interval);
1015 /* supported_rates: 500 kbit/s units with msb ignored */
1016 for (i = 0; i < sizeof(sta->supported_rates); i++)
1017 if (sta->supported_rates[i] != 0)
1018 p += sprintf(p, "%d%sMbps ",
1019 (sta->supported_rates[i] & 0x7f) / 2,
1020 sta->supported_rates[i] & 1 ? ".5" : "");
1021 p += sprintf(p, "\njiffies=%lu\nlast_auth=%lu\nlast_assoc=%lu\n"
1022 "last_rx=%lu\nlast_tx=%lu\nrx_packets=%lu\n"
1023 "tx_packets=%lu\n"
1024 "rx_bytes=%lu\ntx_bytes=%lu\nbuffer_count=%d\n"
1025 "last_rx: silence=%d dBm signal=%d dBm rate=%d%s Mbps\n"
1026 "tx_rate=%d\ntx[1M]=%d\ntx[2M]=%d\ntx[5.5M]=%d\n"
1027 "tx[11M]=%d\n"
1028 "rx[1M]=%d\nrx[2M]=%d\nrx[5.5M]=%d\nrx[11M]=%d\n",
1029 jiffies, sta->last_auth, sta->last_assoc, sta->last_rx,
1030 sta->last_tx,
1031 sta->rx_packets, sta->tx_packets, sta->rx_bytes,
1032 sta->tx_bytes, skb_queue_len(&sta->tx_buf),
1033 sta->last_rx_silence,
1034 sta->last_rx_signal, sta->last_rx_rate / 10,
1035 sta->last_rx_rate % 10 ? ".5" : "",
1036 sta->tx_rate, sta->tx_count[0], sta->tx_count[1],
1037 sta->tx_count[2], sta->tx_count[3], sta->rx_count[0],
1038 sta->rx_count[1], sta->rx_count[2], sta->rx_count[3]);
1039 if (sta->crypt && sta->crypt->ops && sta->crypt->ops->print_stats)
1040 p = sta->crypt->ops->print_stats(p, sta->crypt->priv);
1041 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1042 if (sta->ap) {
1043 if (sta->u.ap.channel >= 0)
1044 p += sprintf(p, "channel=%d\n", sta->u.ap.channel);
1045 p += sprintf(p, "ssid=");
1046 for (i = 0; i < sta->u.ap.ssid_len; i++)
1047 p += sprintf(p, ((sta->u.ap.ssid[i] >= 32 &&
1048 sta->u.ap.ssid[i] < 127) ?
1049 "%c" : "<%02x>"),
1050 sta->u.ap.ssid[i]);
1051 p += sprintf(p, "\n");
1052 }
1053 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1054
1055 return (p - page);
1056 }
1057
1058
1059 static void handle_add_proc_queue(void *data)
1060 {
1061 struct ap_data *ap = (struct ap_data *) data;
1062 struct sta_info *sta;
1063 char name[20];
1064 struct add_sta_proc_data *entry, *prev;
1065
1066 entry = ap->add_sta_proc_entries;
1067 ap->add_sta_proc_entries = NULL;
1068
1069 while (entry) {
1070 spin_lock_bh(&ap->sta_table_lock);
1071 sta = ap_get_sta(ap, entry->addr);
1072 if (sta)
1073 atomic_inc(&sta->users);
1074 spin_unlock_bh(&ap->sta_table_lock);
1075
1076 if (sta) {
1077 sprintf(name, MACSTR, MAC2STR(sta->addr));
1078 sta->proc = create_proc_read_entry(
1079 name, 0, ap->proc,
1080 prism2_sta_proc_read, sta);
1081
1082 atomic_dec(&sta->users);
1083 }
1084
1085 prev = entry;
1086 entry = entry->next;
1087 kfree(prev);
1088 }
1089 }
1090
1091
1092 static struct sta_info * ap_add_sta(struct ap_data *ap, u8 *addr)
1093 {
1094 struct sta_info *sta;
1095
1096 sta = (struct sta_info *)
1097 kmalloc(sizeof(struct sta_info), GFP_ATOMIC);
1098 if (sta == NULL) {
1099 PDEBUG(DEBUG_AP, "AP: kmalloc failed\n");
1100 return NULL;
1101 }
1102
1103 /* initialize STA info data */
1104 memset(sta, 0, sizeof(struct sta_info));
1105 sta->local = ap->local;
1106 skb_queue_head_init(&sta->tx_buf);
1107 memcpy(sta->addr, addr, ETH_ALEN);
1108
1109 atomic_inc(&sta->users);
1110 spin_lock_bh(&ap->sta_table_lock);
1111 list_add(&sta->list, &ap->sta_list);
1112 ap->num_sta++;
1113 ap_sta_hash_add(ap, sta);
1114 spin_unlock_bh(&ap->sta_table_lock);
1115
1116 if (ap->proc) {
1117 struct add_sta_proc_data *entry;
1118 /* schedule a non-interrupt context process to add a procfs
1119 * entry for the STA since procfs code use GFP_KERNEL */
1120 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
1121 if (entry) {
1122 memcpy(entry->addr, sta->addr, ETH_ALEN);
1123 entry->next = ap->add_sta_proc_entries;
1124 ap->add_sta_proc_entries = entry;
1125 schedule_work(&ap->add_sta_proc_queue);
1126 } else
1127 printk(KERN_DEBUG "Failed to add STA proc data\n");
1128 }
1129
1130 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1131 init_timer(&sta->timer);
1132 sta->timer.expires = jiffies + ap->max_inactivity;
1133 sta->timer.data = (unsigned long) sta;
1134 sta->timer.function = ap_handle_timer;
1135 if (!ap->local->hostapd)
1136 add_timer(&sta->timer);
1137 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1138
1139 return sta;
1140 }
1141
1142
1143 static int ap_tx_rate_ok(int rateidx, struct sta_info *sta,
1144 local_info_t *local)
1145 {
1146 if (rateidx > sta->tx_max_rate ||
1147 !(sta->tx_supp_rates & (1 << rateidx)))
1148 return 0;
1149
1150 if (local->tx_rate_control != 0 &&
1151 !(local->tx_rate_control & (1 << rateidx)))
1152 return 0;
1153
1154 return 1;
1155 }
1156
1157
1158 static void prism2_check_tx_rates(struct sta_info *sta)
1159 {
1160 int i;
1161
1162 sta->tx_supp_rates = 0;
1163 for (i = 0; i < sizeof(sta->supported_rates); i++) {
1164 if ((sta->supported_rates[i] & 0x7f) == 2)
1165 sta->tx_supp_rates |= WLAN_RATE_1M;
1166 if ((sta->supported_rates[i] & 0x7f) == 4)
1167 sta->tx_supp_rates |= WLAN_RATE_2M;
1168 if ((sta->supported_rates[i] & 0x7f) == 11)
1169 sta->tx_supp_rates |= WLAN_RATE_5M5;
1170 if ((sta->supported_rates[i] & 0x7f) == 22)
1171 sta->tx_supp_rates |= WLAN_RATE_11M;
1172 }
1173 sta->tx_max_rate = sta->tx_rate = sta->tx_rate_idx = 0;
1174 if (sta->tx_supp_rates & WLAN_RATE_1M) {
1175 sta->tx_max_rate = 0;
1176 if (ap_tx_rate_ok(0, sta, sta->local)) {
1177 sta->tx_rate = 10;
1178 sta->tx_rate_idx = 0;
1179 }
1180 }
1181 if (sta->tx_supp_rates & WLAN_RATE_2M) {
1182 sta->tx_max_rate = 1;
1183 if (ap_tx_rate_ok(1, sta, sta->local)) {
1184 sta->tx_rate = 20;
1185 sta->tx_rate_idx = 1;
1186 }
1187 }
1188 if (sta->tx_supp_rates & WLAN_RATE_5M5) {
1189 sta->tx_max_rate = 2;
1190 if (ap_tx_rate_ok(2, sta, sta->local)) {
1191 sta->tx_rate = 55;
1192 sta->tx_rate_idx = 2;
1193 }
1194 }
1195 if (sta->tx_supp_rates & WLAN_RATE_11M) {
1196 sta->tx_max_rate = 3;
1197 if (ap_tx_rate_ok(3, sta, sta->local)) {
1198 sta->tx_rate = 110;
1199 sta->tx_rate_idx = 3;
1200 }
1201 }
1202 }
1203
1204
1205 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1206
1207 static void ap_crypt_init(struct ap_data *ap)
1208 {
1209 ap->crypt = hostap_get_crypto_ops("WEP");
1210
1211 if (ap->crypt) {
1212 if (ap->crypt->init) {
1213 ap->crypt_priv = ap->crypt->init(0);
1214 if (ap->crypt_priv == NULL)
1215 ap->crypt = NULL;
1216 else {
1217 u8 key[WEP_KEY_LEN];
1218 get_random_bytes(key, WEP_KEY_LEN);
1219 ap->crypt->set_key(key, WEP_KEY_LEN, NULL,
1220 ap->crypt_priv);
1221 }
1222 }
1223 }
1224
1225 if (ap->crypt == NULL) {
1226 printk(KERN_WARNING "AP could not initialize WEP: load module "
1227 "hostap_crypt_wep.o\n");
1228 }
1229 }
1230
1231
1232 /* Generate challenge data for shared key authentication. IEEE 802.11 specifies
1233 * that WEP algorithm is used for generating challange. This should be unique,
1234 * but otherwise there is not really need for randomness etc. Initialize WEP
1235 * with pseudo random key and then use increasing IV to get unique challenge
1236 * streams.
1237 *
1238 * Called only as a scheduled task for pending AP frames.
1239 */
1240 static char * ap_auth_make_challenge(struct ap_data *ap)
1241 {
1242 char *tmpbuf;
1243 struct sk_buff *skb;
1244
1245 if (ap->crypt == NULL) {
1246 ap_crypt_init(ap);
1247 if (ap->crypt == NULL)
1248 return NULL;
1249 }
1250
1251 tmpbuf = (char *) kmalloc(WLAN_AUTH_CHALLENGE_LEN, GFP_ATOMIC);
1252 if (tmpbuf == NULL) {
1253 PDEBUG(DEBUG_AP, "AP: kmalloc failed for challenge\n");
1254 return NULL;
1255 }
1256
1257 skb = dev_alloc_skb(WLAN_AUTH_CHALLENGE_LEN +
1258 ap->crypt->extra_prefix_len +
1259 ap->crypt->extra_postfix_len);
1260 if (skb == NULL) {
1261 kfree(tmpbuf);
1262 return NULL;
1263 }
1264
1265 skb_reserve(skb, ap->crypt->extra_prefix_len);
1266 memset(skb_put(skb, WLAN_AUTH_CHALLENGE_LEN), 0,
1267 WLAN_AUTH_CHALLENGE_LEN);
1268 if (ap->crypt->encrypt_mpdu(skb, 0, ap->crypt_priv)) {
1269 dev_kfree_skb(skb);
1270 kfree(tmpbuf);
1271 return NULL;
1272 }
1273
1274 memcpy(tmpbuf, skb->data + ap->crypt->extra_prefix_len,
1275 WLAN_AUTH_CHALLENGE_LEN);
1276 dev_kfree_skb(skb);
1277
1278 return tmpbuf;
1279 }
1280
1281
1282 /* Called only as a scheduled task for pending AP frames. */
1283 static void handle_authen(local_info_t *local, struct sk_buff *skb,
1284 struct hostap_80211_rx_status *rx_stats)
1285 {
1286 struct net_device *dev = local->dev;
1287 struct hostap_ieee80211_hdr *hdr =
1288 (struct hostap_ieee80211_hdr *) skb->data;
1289 size_t hdrlen;
1290 struct ap_data *ap = local->ap;
1291 char body[8 + WLAN_AUTH_CHALLENGE_LEN], *challenge = NULL;
1292 int len, olen;
1293 u16 auth_alg, auth_transaction, status_code, *pos;
1294 u16 resp = WLAN_STATUS_SUCCESS, fc;
1295 struct sta_info *sta = NULL;
1296 struct prism2_crypt_data *crypt;
1297 char *txt = "";
1298
1299 len = skb->len - IEEE80211_MGMT_HDR_LEN;
1300
1301 fc = le16_to_cpu(hdr->frame_control);
1302 hdrlen = hostap_80211_get_hdrlen(fc);
1303
1304 if (len < 6) {
1305 PDEBUG(DEBUG_AP, "%s: handle_authen - too short payload "
1306 "(len=%d) from " MACSTR "\n", dev->name, len,
1307 MAC2STR(hdr->addr2));
1308 return;
1309 }
1310
1311 spin_lock_bh(&local->ap->sta_table_lock);
1312 sta = ap_get_sta(local->ap, hdr->addr2);
1313 if (sta)
1314 atomic_inc(&sta->users);
1315 spin_unlock_bh(&local->ap->sta_table_lock);
1316
1317 if (sta && sta->crypt)
1318 crypt = sta->crypt;
1319 else {
1320 int idx = 0;
1321 if (skb->len >= hdrlen + 3)
1322 idx = skb->data[hdrlen + 3] >> 6;
1323 crypt = local->crypt[idx];
1324 }
1325
1326 pos = (u16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
1327 auth_alg = __le16_to_cpu(*pos);
1328 pos++;
1329 auth_transaction = __le16_to_cpu(*pos);
1330 pos++;
1331 status_code = __le16_to_cpu(*pos);
1332 pos++;
1333
1334 if (memcmp(dev->dev_addr, hdr->addr2, ETH_ALEN) == 0 ||
1335 ap_control_mac_deny(&ap->mac_restrictions, hdr->addr2)) {
1336 txt = "authentication denied";
1337 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1338 goto fail;
1339 }
1340
1341 if (((local->auth_algs & PRISM2_AUTH_OPEN) &&
1342 auth_alg == WLAN_AUTH_OPEN) ||
1343 ((local->auth_algs & PRISM2_AUTH_SHARED_KEY) &&
1344 crypt && auth_alg == WLAN_AUTH_SHARED_KEY)) {
1345 } else {
1346 txt = "unsupported algorithm";
1347 resp = WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG;
1348 goto fail;
1349 }
1350
1351 if (len >= 8) {
1352 u8 *u = (u8 *) pos;
1353 if (*u == WLAN_EID_CHALLENGE) {
1354 if (*(u + 1) != WLAN_AUTH_CHALLENGE_LEN) {
1355 txt = "invalid challenge len";
1356 resp = WLAN_STATUS_CHALLENGE_FAIL;
1357 goto fail;
1358 }
1359 if (len - 8 < WLAN_AUTH_CHALLENGE_LEN) {
1360 txt = "challenge underflow";
1361 resp = WLAN_STATUS_CHALLENGE_FAIL;
1362 goto fail;
1363 }
1364 challenge = (char *) (u + 2);
1365 }
1366 }
1367
1368 if (sta && sta->ap) {
1369 if (time_after(jiffies, sta->u.ap.last_beacon +
1370 (10 * sta->listen_interval * HZ) / 1024)) {
1371 PDEBUG(DEBUG_AP, "%s: no beacons received for a while,"
1372 " assuming AP " MACSTR " is now STA\n",
1373 dev->name, MAC2STR(sta->addr));
1374 sta->ap = 0;
1375 sta->flags = 0;
1376 sta->u.sta.challenge = NULL;
1377 } else {
1378 txt = "AP trying to authenticate?";
1379 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1380 goto fail;
1381 }
1382 }
1383
1384 if ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 1) ||
1385 (auth_alg == WLAN_AUTH_SHARED_KEY &&
1386 (auth_transaction == 1 ||
1387 (auth_transaction == 3 && sta != NULL &&
1388 sta->u.sta.challenge != NULL)))) {
1389 } else {
1390 txt = "unknown authentication transaction number";
1391 resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION;
1392 goto fail;
1393 }
1394
1395 if (sta == NULL) {
1396 txt = "new STA";
1397
1398 if (local->ap->num_sta >= MAX_STA_COUNT) {
1399 /* FIX: might try to remove some old STAs first? */
1400 txt = "no more room for new STAs";
1401 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1402 goto fail;
1403 }
1404
1405 sta = ap_add_sta(local->ap, hdr->addr2);
1406 if (sta == NULL) {
1407 txt = "ap_add_sta failed";
1408 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1409 goto fail;
1410 }
1411 }
1412
1413 switch (auth_alg) {
1414 case WLAN_AUTH_OPEN:
1415 txt = "authOK";
1416 /* IEEE 802.11 standard is not completely clear about
1417 * whether STA is considered authenticated after
1418 * authentication OK frame has been send or after it
1419 * has been ACKed. In order to reduce interoperability
1420 * issues, mark the STA authenticated before ACK. */
1421 sta->flags |= WLAN_STA_AUTH;
1422 break;
1423
1424 case WLAN_AUTH_SHARED_KEY:
1425 if (auth_transaction == 1) {
1426 if (sta->u.sta.challenge == NULL) {
1427 sta->u.sta.challenge =
1428 ap_auth_make_challenge(local->ap);
1429 if (sta->u.sta.challenge == NULL) {
1430 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1431 goto fail;
1432 }
1433 }
1434 } else {
1435 if (sta->u.sta.challenge == NULL ||
1436 challenge == NULL ||
1437 memcmp(sta->u.sta.challenge, challenge,
1438 WLAN_AUTH_CHALLENGE_LEN) != 0 ||
1439 !(fc & WLAN_FC_ISWEP)) {
1440 txt = "challenge response incorrect";
1441 resp = WLAN_STATUS_CHALLENGE_FAIL;
1442 goto fail;
1443 }
1444
1445 txt = "challenge OK - authOK";
1446 /* IEEE 802.11 standard is not completely clear about
1447 * whether STA is considered authenticated after
1448 * authentication OK frame has been send or after it
1449 * has been ACKed. In order to reduce interoperability
1450 * issues, mark the STA authenticated before ACK. */
1451 sta->flags |= WLAN_STA_AUTH;
1452 kfree(sta->u.sta.challenge);
1453 sta->u.sta.challenge = NULL;
1454 }
1455 break;
1456 }
1457
1458 fail:
1459 pos = (u16 *) body;
1460 *pos = cpu_to_le16(auth_alg);
1461 pos++;
1462 *pos = cpu_to_le16(auth_transaction + 1);
1463 pos++;
1464 *pos = cpu_to_le16(resp); /* status_code */
1465 pos++;
1466 olen = 6;
1467
1468 if (resp == WLAN_STATUS_SUCCESS && sta != NULL &&
1469 sta->u.sta.challenge != NULL &&
1470 auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 1) {
1471 u8 *tmp = (u8 *) pos;
1472 *tmp++ = WLAN_EID_CHALLENGE;
1473 *tmp++ = WLAN_AUTH_CHALLENGE_LEN;
1474 pos++;
1475 memcpy(pos, sta->u.sta.challenge, WLAN_AUTH_CHALLENGE_LEN);
1476 olen += 2 + WLAN_AUTH_CHALLENGE_LEN;
1477 }
1478
1479 prism2_send_mgmt(dev, WLAN_FC_TYPE_MGMT, WLAN_FC_STYPE_AUTH,
1480 body, olen, hdr->addr2, ap->tx_callback_auth);
1481
1482 if (sta) {
1483 sta->last_rx = jiffies;
1484 atomic_dec(&sta->users);
1485 }
1486
1487 if (resp) {
1488 PDEBUG(DEBUG_AP, "%s: " MACSTR " auth (alg=%d trans#=%d "
1489 "stat=%d len=%d fc=%04x) ==> %d (%s)\n",
1490 dev->name, MAC2STR(hdr->addr2), auth_alg,
1491 auth_transaction, status_code, len, fc, resp, txt);
1492 }
1493 }
1494
1495
1496 /* Called only as a scheduled task for pending AP frames. */
1497 static void handle_assoc(local_info_t *local, struct sk_buff *skb,
1498 struct hostap_80211_rx_status *rx_stats, int reassoc)
1499 {
1500 struct net_device *dev = local->dev;
1501 struct hostap_ieee80211_hdr *hdr =
1502 (struct hostap_ieee80211_hdr *) skb->data;
1503 char body[12], *p, *lpos;
1504 int len, left;
1505 u16 *pos;
1506 u16 resp = WLAN_STATUS_SUCCESS;
1507 struct sta_info *sta = NULL;
1508 int send_deauth = 0;
1509 char *txt = "";
1510 u8 prev_ap[ETH_ALEN];
1511
1512 left = len = skb->len - IEEE80211_MGMT_HDR_LEN;
1513
1514 if (len < (reassoc ? 10 : 4)) {
1515 PDEBUG(DEBUG_AP, "%s: handle_assoc - too short payload "
1516 "(len=%d, reassoc=%d) from " MACSTR "\n",
1517 dev->name, len, reassoc, MAC2STR(hdr->addr2));
1518 return;
1519 }
1520
1521 spin_lock_bh(&local->ap->sta_table_lock);
1522 sta = ap_get_sta(local->ap, hdr->addr2);
1523 if (sta == NULL || (sta->flags & WLAN_STA_AUTH) == 0) {
1524 spin_unlock_bh(&local->ap->sta_table_lock);
1525 txt = "trying to associate before authentication";
1526 send_deauth = 1;
1527 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1528 sta = NULL; /* do not decrement sta->users */
1529 goto fail;
1530 }
1531 atomic_inc(&sta->users);
1532 spin_unlock_bh(&local->ap->sta_table_lock);
1533
1534 pos = (u16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
1535 sta->capability = __le16_to_cpu(*pos);
1536 pos++; left -= 2;
1537 sta->listen_interval = __le16_to_cpu(*pos);
1538 pos++; left -= 2;
1539
1540 if (reassoc) {
1541 memcpy(prev_ap, pos, ETH_ALEN);
1542 pos++; pos++; pos++; left -= 6;
1543 } else
1544 memset(prev_ap, 0, ETH_ALEN);
1545
1546 if (left >= 2) {
1547 unsigned int ileft;
1548 unsigned char *u = (unsigned char *) pos;
1549
1550 if (*u == WLAN_EID_SSID) {
1551 u++; left--;
1552 ileft = *u;
1553 u++; left--;
1554
1555 if (ileft > left || ileft > MAX_SSID_LEN) {
1556 txt = "SSID overflow";
1557 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1558 goto fail;
1559 }
1560
1561 if (ileft != strlen(local->essid) ||
1562 memcmp(local->essid, u, ileft) != 0) {
1563 txt = "not our SSID";
1564 resp = WLAN_STATUS_ASSOC_DENIED_UNSPEC;
1565 goto fail;
1566 }
1567
1568 u += ileft;
1569 left -= ileft;
1570 }
1571
1572 if (left >= 2 && *u == WLAN_EID_SUPP_RATES) {
1573 u++; left--;
1574 ileft = *u;
1575 u++; left--;
1576
1577 if (ileft > left || ileft == 0 ||
1578 ileft > WLAN_SUPP_RATES_MAX) {
1579 txt = "SUPP_RATES len error";
1580 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1581 goto fail;
1582 }
1583
1584 memset(sta->supported_rates, 0,
1585 sizeof(sta->supported_rates));
1586 memcpy(sta->supported_rates, u, ileft);
1587 prism2_check_tx_rates(sta);
1588
1589 u += ileft;
1590 left -= ileft;
1591 }
1592
1593 if (left > 0) {
1594 PDEBUG(DEBUG_AP, "%s: assoc from " MACSTR " with extra"
1595 " data (%d bytes) [",
1596 dev->name, MAC2STR(hdr->addr2), left);
1597 while (left > 0) {
1598 PDEBUG2(DEBUG_AP, "<%02x>", *u);
1599 u++; left--;
1600 }
1601 PDEBUG2(DEBUG_AP, "]\n");
1602 }
1603 } else {
1604 txt = "frame underflow";
1605 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1606 goto fail;
1607 }
1608
1609 /* get a unique AID */
1610 if (sta->aid > 0)
1611 txt = "OK, old AID";
1612 else {
1613 spin_lock_bh(&local->ap->sta_table_lock);
1614 for (sta->aid = 1; sta->aid <= MAX_AID_TABLE_SIZE; sta->aid++)
1615 if (local->ap->sta_aid[sta->aid - 1] == NULL)
1616 break;
1617 if (sta->aid > MAX_AID_TABLE_SIZE) {
1618 sta->aid = 0;
1619 spin_unlock_bh(&local->ap->sta_table_lock);
1620 resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
1621 txt = "no room for more AIDs";
1622 } else {
1623 local->ap->sta_aid[sta->aid - 1] = sta;
1624 spin_unlock_bh(&local->ap->sta_table_lock);
1625 txt = "OK, new AID";
1626 }
1627 }
1628
1629 fail:
1630 pos = (u16 *) body;
1631
1632 if (send_deauth) {
1633 *pos = __constant_cpu_to_le16(
1634 WLAN_REASON_STA_REQ_ASSOC_WITHOUT_AUTH);
1635 pos++;
1636 } else {
1637 /* FIX: CF-Pollable and CF-PollReq should be set to match the
1638 * values in beacons/probe responses */
1639 /* FIX: how about privacy and WEP? */
1640 /* capability */
1641 *pos = __constant_cpu_to_le16(WLAN_CAPABILITY_ESS);
1642 pos++;
1643
1644 /* status_code */
1645 *pos = __cpu_to_le16(resp);
1646 pos++;
1647
1648 *pos = __cpu_to_le16((sta && sta->aid > 0 ? sta->aid : 0) |
1649 BIT(14) | BIT(15)); /* AID */
1650 pos++;
1651
1652 /* Supported rates (Information element) */
1653 p = (char *) pos;
1654 *p++ = WLAN_EID_SUPP_RATES;
1655 lpos = p;
1656 *p++ = 0; /* len */
1657 if (local->tx_rate_control & WLAN_RATE_1M) {
1658 *p++ = local->basic_rates & WLAN_RATE_1M ? 0x82 : 0x02;
1659 (*lpos)++;
1660 }
1661 if (local->tx_rate_control & WLAN_RATE_2M) {
1662 *p++ = local->basic_rates & WLAN_RATE_2M ? 0x84 : 0x04;
1663 (*lpos)++;
1664 }
1665 if (local->tx_rate_control & WLAN_RATE_5M5) {
1666 *p++ = local->basic_rates & WLAN_RATE_5M5 ?
1667 0x8b : 0x0b;
1668 (*lpos)++;
1669 }
1670 if (local->tx_rate_control & WLAN_RATE_11M) {
1671 *p++ = local->basic_rates & WLAN_RATE_11M ?
1672 0x96 : 0x16;
1673 (*lpos)++;
1674 }
1675 pos = (u16 *) p;
1676 }
1677
1678 prism2_send_mgmt(dev, WLAN_FC_TYPE_MGMT,
1679 (send_deauth ? WLAN_FC_STYPE_DEAUTH :
1680 (reassoc ? WLAN_FC_STYPE_REASSOC_RESP :
1681 WLAN_FC_STYPE_ASSOC_RESP)),
1682 body, (u8 *) pos - (u8 *) body,
1683 hdr->addr2,
1684 send_deauth ? 0 : local->ap->tx_callback_assoc);
1685
1686 if (sta) {
1687 if (resp == WLAN_STATUS_SUCCESS) {
1688 sta->last_rx = jiffies;
1689 /* STA will be marked associated from TX callback, if
1690 * AssocResp is ACKed */
1691 }
1692 atomic_dec(&sta->users);
1693 }
1694
1695 #if 0
1696 PDEBUG(DEBUG_AP, "%s: " MACSTR " %sassoc (len=%d prev_ap=" MACSTR
1697 ") => %d(%d) (%s)\n",
1698 dev->name, MAC2STR(hdr->addr2), reassoc ? "re" : "", len,
1699 MAC2STR(prev_ap), resp, send_deauth, txt);
1700 #endif
1701 }
1702
1703
1704 /* Called only as a scheduled task for pending AP frames. */
1705 static void handle_deauth(local_info_t *local, struct sk_buff *skb,
1706 struct hostap_80211_rx_status *rx_stats)
1707 {
1708 struct net_device *dev = local->dev;
1709 struct hostap_ieee80211_hdr *hdr =
1710 (struct hostap_ieee80211_hdr *) skb->data;
1711 char *body = (char *) (skb->data + IEEE80211_MGMT_HDR_LEN);
1712 int len;
1713 u16 reason_code, *pos;
1714 struct sta_info *sta = NULL;
1715
1716 len = skb->len - IEEE80211_MGMT_HDR_LEN;
1717
1718 if (len < 2) {
1719 printk("handle_deauth - too short payload (len=%d)\n", len);
1720 return;
1721 }
1722
1723 pos = (u16 *) body;
1724 reason_code = __le16_to_cpu(*pos);
1725
1726 PDEBUG(DEBUG_AP, "%s: deauthentication: " MACSTR " len=%d, "
1727 "reason_code=%d\n", dev->name, MAC2STR(hdr->addr2), len,
1728 reason_code);
1729
1730 spin_lock_bh(&local->ap->sta_table_lock);
1731 sta = ap_get_sta(local->ap, hdr->addr2);
1732 if (sta != NULL) {
1733 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap)
1734 hostap_event_expired_sta(local->dev, sta);
1735 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
1736 }
1737 spin_unlock_bh(&local->ap->sta_table_lock);
1738 if (sta == NULL) {
1739 printk("%s: deauthentication from " MACSTR ", "
1740 "reason_code=%d, but STA not authenticated\n", dev->name,
1741 MAC2STR(hdr->addr2), reason_code);
1742 }
1743 }
1744
1745
1746 /* Called only as a scheduled task for pending AP frames. */
1747 static void handle_disassoc(local_info_t *local, struct sk_buff *skb,
1748 struct hostap_80211_rx_status *rx_stats)
1749 {
1750 struct net_device *dev = local->dev;
1751 struct hostap_ieee80211_hdr *hdr =
1752 (struct hostap_ieee80211_hdr *) skb->data;
1753 char *body = skb->data + IEEE80211_MGMT_HDR_LEN;
1754 int len;
1755 u16 reason_code, *pos;
1756 struct sta_info *sta = NULL;
1757
1758 len = skb->len - IEEE80211_MGMT_HDR_LEN;
1759
1760 if (len < 2) {
1761 printk("handle_disassoc - too short payload (len=%d)\n", len);
1762 return;
1763 }
1764
1765 pos = (u16 *) body;
1766 reason_code = __le16_to_cpu(*pos);
1767
1768 PDEBUG(DEBUG_AP, "%s: disassociation: " MACSTR " len=%d, "
1769 "reason_code=%d\n", dev->name, MAC2STR(hdr->addr2), len,
1770 reason_code);
1771
1772 spin_lock_bh(&local->ap->sta_table_lock);
1773 sta = ap_get_sta(local->ap, hdr->addr2);
1774 if (sta != NULL) {
1775 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap)
1776 hostap_event_expired_sta(local->dev, sta);
1777 sta->flags &= ~WLAN_STA_ASSOC;
1778 }
1779 spin_unlock_bh(&local->ap->sta_table_lock);
1780 if (sta == NULL) {
1781 printk("%s: disassociation from " MACSTR ", "
1782 "reason_code=%d, but STA not authenticated\n",
1783 dev->name, MAC2STR(hdr->addr2), reason_code);
1784 }
1785 }
1786
1787
1788 /* Called only as a scheduled task for pending AP frames. */
1789 static void ap_handle_data_nullfunc(local_info_t *local,
1790 struct hostap_ieee80211_hdr *hdr)
1791 {
1792 struct net_device *dev = local->dev;
1793
1794 /* some STA f/w's seem to require control::ACK frame for
1795 * data::nullfunc, but at least Prism2 station f/w version 0.8.0 does
1796 * not send this..
1797 * send control::ACK for the data::nullfunc */
1798
1799 printk(KERN_DEBUG "Sending control::ACK for data::nullfunc\n");
1800 prism2_send_mgmt(dev, WLAN_FC_TYPE_CTRL, WLAN_FC_STYPE_ACK,
1801 NULL, 0, hdr->addr2, 0);
1802 }
1803
1804
1805 /* Called only as a scheduled task for pending AP frames. */
1806 static void ap_handle_dropped_data(local_info_t *local,
1807 struct hostap_ieee80211_hdr *hdr)
1808 {
1809 struct net_device *dev = local->dev;
1810 struct sta_info *sta;
1811 u16 reason;
1812
1813 spin_lock_bh(&local->ap->sta_table_lock);
1814 sta = ap_get_sta(local->ap, hdr->addr2);
1815 if (sta)
1816 atomic_inc(&sta->users);
1817 spin_unlock_bh(&local->ap->sta_table_lock);
1818
1819 if (sta != NULL && (sta->flags & WLAN_STA_ASSOC)) {
1820 PDEBUG(DEBUG_AP, "ap_handle_dropped_data: STA is now okay?\n");
1821 atomic_dec(&sta->users);
1822 return;
1823 }
1824
1825 reason = __constant_cpu_to_le16(
1826 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
1827 prism2_send_mgmt(dev, WLAN_FC_TYPE_MGMT,
1828 ((sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) ?
1829 WLAN_FC_STYPE_DEAUTH : WLAN_FC_STYPE_DISASSOC),
1830 (char *) &reason, sizeof(reason), hdr->addr2, 0);
1831
1832 if (sta)
1833 atomic_dec(&sta->users);
1834 }
1835
1836 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1837
1838
1839 /* Called only as a scheduled task for pending AP frames. */
1840 static void pspoll_send_buffered(local_info_t *local, struct sta_info *sta,
1841 struct sk_buff *skb)
1842 {
1843 if (!(sta->flags & WLAN_STA_PS)) {
1844 /* Station has moved to non-PS mode, so send all buffered
1845 * frames using normal device queue. */
1846 dev_queue_xmit(skb);
1847 return;
1848 }
1849
1850 /* add a flag for hostap_handle_sta_tx() to know that this skb should
1851 * be passed through even though STA is using PS */
1852 memcpy(skb->cb, AP_SKB_CB_MAGIC, AP_SKB_CB_MAGIC_LEN);
1853 skb->cb[AP_SKB_CB_MAGIC_LEN] = AP_SKB_CB_BUFFERED_FRAME;
1854 if (!skb_queue_empty(&sta->tx_buf)) {
1855 /* indicate to STA that more frames follow */
1856 skb->cb[AP_SKB_CB_MAGIC_LEN] |= AP_SKB_CB_ADD_MOREDATA;
1857 }
1858 dev_queue_xmit(skb);
1859 }
1860
1861
1862 /* Called only as a scheduled task for pending AP frames. */
1863 static void handle_pspoll(local_info_t *local,
1864 struct hostap_ieee80211_hdr *hdr,
1865 struct hostap_80211_rx_status *rx_stats)
1866 {
1867 struct net_device *dev = local->dev;
1868 struct sta_info *sta;
1869 u16 aid;
1870 struct sk_buff *skb;
1871
1872 PDEBUG(DEBUG_PS2, "handle_pspoll: BSSID=" MACSTR ", TA=" MACSTR
1873 " PWRMGT=%d\n",
1874 MAC2STR(hdr->addr1), MAC2STR(hdr->addr2),
1875 !!(le16_to_cpu(hdr->frame_control) & WLAN_FC_PWRMGT));
1876
1877 if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN)) {
1878 PDEBUG(DEBUG_AP, "handle_pspoll - addr1(BSSID)=" MACSTR
1879 " not own MAC\n", MAC2STR(hdr->addr1));
1880 return;
1881 }
1882
1883 aid = __le16_to_cpu(hdr->duration_id);
1884 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) {
1885 PDEBUG(DEBUG_PS, " PSPOLL and AID[15:14] not set\n");
1886 return;
1887 }
1888 aid &= ~BIT(15) & ~BIT(14);
1889 if (aid == 0 || aid > MAX_AID_TABLE_SIZE) {
1890 PDEBUG(DEBUG_PS, " invalid aid=%d\n", aid);
1891 return;
1892 }
1893 PDEBUG(DEBUG_PS2, " aid=%d\n", aid);
1894
1895 spin_lock_bh(&local->ap->sta_table_lock);
1896 sta = ap_get_sta(local->ap, hdr->addr2);
1897 if (sta)
1898 atomic_inc(&sta->users);
1899 spin_unlock_bh(&local->ap->sta_table_lock);
1900
1901 if (sta == NULL) {
1902 PDEBUG(DEBUG_PS, " STA not found\n");
1903 return;
1904 }
1905 if (sta->aid != aid) {
1906 PDEBUG(DEBUG_PS, " received aid=%i does not match with "
1907 "assoc.aid=%d\n", aid, sta->aid);
1908 return;
1909 }
1910
1911 /* FIX: todo:
1912 * - add timeout for buffering (clear aid in TIM vector if buffer timed
1913 * out (expiry time must be longer than ListenInterval for
1914 * the corresponding STA; "8802-11: 11.2.1.9 AP aging function"
1915 * - what to do, if buffered, pspolled, and sent frame is not ACKed by
1916 * sta; store buffer for later use and leave TIM aid bit set? use
1917 * TX event to check whether frame was ACKed?
1918 */
1919
1920 while ((skb = skb_dequeue(&sta->tx_buf)) != NULL) {
1921 /* send buffered frame .. */
1922 PDEBUG(DEBUG_PS2, "Sending buffered frame to STA after PS POLL"
1923 " (buffer_count=%d)\n", skb_queue_len(&sta->tx_buf));
1924
1925 pspoll_send_buffered(local, sta, skb);
1926
1927 if (sta->flags & WLAN_STA_PS) {
1928 /* send only one buffered packet per PS Poll */
1929 /* FIX: should ignore further PS Polls until the
1930 * buffered packet that was just sent is acknowledged
1931 * (Tx or TxExc event) */
1932 break;
1933 }
1934 }
1935
1936 if (skb_queue_empty(&sta->tx_buf)) {
1937 /* try to clear aid from TIM */
1938 if (!(sta->flags & WLAN_STA_TIM))
1939 PDEBUG(DEBUG_PS2, "Re-unsetting TIM for aid %d\n",
1940 aid);
1941 hostap_set_tim(local, aid, 0);
1942 sta->flags &= ~WLAN_STA_TIM;
1943 }
1944
1945 atomic_dec(&sta->users);
1946 }
1947
1948
1949 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1950
1951 static void handle_wds_oper_queue(void *data)
1952 {
1953 local_info_t *local = data;
1954 struct wds_oper_data *entry, *prev;
1955
1956 spin_lock_bh(&local->lock);
1957 entry = local->ap->wds_oper_entries;
1958 local->ap->wds_oper_entries = NULL;
1959 spin_unlock_bh(&local->lock);
1960
1961 while (entry) {
1962 PDEBUG(DEBUG_AP, "%s: %s automatic WDS connection "
1963 "to AP " MACSTR "\n",
1964 local->dev->name,
1965 entry->type == WDS_ADD ? "adding" : "removing",
1966 MAC2STR(entry->addr));
1967 if (entry->type == WDS_ADD)
1968 prism2_wds_add(local, entry->addr, 0);
1969 else if (entry->type == WDS_DEL)
1970 prism2_wds_del(local, entry->addr, 0, 1);
1971
1972 prev = entry;
1973 entry = entry->next;
1974 kfree(prev);
1975 }
1976 }
1977
1978
1979 /* Called only as a scheduled task for pending AP frames. */
1980 static void handle_beacon(local_info_t *local, struct sk_buff *skb,
1981 struct hostap_80211_rx_status *rx_stats)
1982 {
1983 struct hostap_ieee80211_hdr *hdr =
1984 (struct hostap_ieee80211_hdr *) skb->data;
1985 char *body = skb->data + IEEE80211_MGMT_HDR_LEN;
1986 int len, left;
1987 u16 *pos, beacon_int, capability;
1988 char *ssid = NULL;
1989 unsigned char *supp_rates = NULL;
1990 int ssid_len = 0, supp_rates_len = 0;
1991 struct sta_info *sta = NULL;
1992 int new_sta = 0, channel = -1;
1993
1994 len = skb->len - IEEE80211_MGMT_HDR_LEN;
1995
1996 if (len < 8 + 2 + 2) {
1997 printk(KERN_DEBUG "handle_beacon - too short payload "
1998 "(len=%d)\n", len);
1999 return;
2000 }
2001
2002 pos = (u16 *) body;
2003 left = len;
2004
2005 /* Timestamp (8 octets) */
2006 pos += 4; left -= 8;
2007 /* Beacon interval (2 octets) */
2008 beacon_int = __le16_to_cpu(*pos);
2009 pos++; left -= 2;
2010 /* Capability information (2 octets) */
2011 capability = __le16_to_cpu(*pos);
2012 pos++; left -= 2;
2013
2014 if (local->ap->ap_policy != AP_OTHER_AP_EVEN_IBSS &&
2015 capability & WLAN_CAPABILITY_IBSS)
2016 return;
2017
2018 if (left >= 2) {
2019 unsigned int ileft;
2020 unsigned char *u = (unsigned char *) pos;
2021
2022 if (*u == WLAN_EID_SSID) {
2023 u++; left--;
2024 ileft = *u;
2025 u++; left--;
2026
2027 if (ileft > left || ileft > MAX_SSID_LEN) {
2028 PDEBUG(DEBUG_AP, "SSID: overflow\n");
2029 return;
2030 }
2031
2032 if (local->ap->ap_policy == AP_OTHER_AP_SAME_SSID &&
2033 (ileft != strlen(local->essid) ||
2034 memcmp(local->essid, u, ileft) != 0)) {
2035 /* not our SSID */
2036 return;
2037 }
2038
2039 ssid = u;
2040 ssid_len = ileft;
2041
2042 u += ileft;
2043 left -= ileft;
2044 }
2045
2046 if (*u == WLAN_EID_SUPP_RATES) {
2047 u++; left--;
2048 ileft = *u;
2049 u++; left--;
2050
2051 if (ileft > left || ileft == 0 || ileft > 8) {
2052 PDEBUG(DEBUG_AP, " - SUPP_RATES len error\n");
2053 return;
2054 }
2055
2056 supp_rates = u;
2057 supp_rates_len = ileft;
2058
2059 u += ileft;
2060 left -= ileft;
2061 }
2062
2063 if (*u == WLAN_EID_DS_PARAMS) {
2064 u++; left--;
2065 ileft = *u;
2066 u++; left--;
2067
2068 if (ileft > left || ileft != 1) {
2069 PDEBUG(DEBUG_AP, " - DS_PARAMS len error\n");
2070 return;
2071 }
2072
2073 channel = *u;
2074
2075 u += ileft;
2076 left -= ileft;
2077 }
2078 }
2079
2080 spin_lock_bh(&local->ap->sta_table_lock);
2081 sta = ap_get_sta(local->ap, hdr->addr2);
2082 if (sta != NULL)
2083 atomic_inc(&sta->users);
2084 spin_unlock_bh(&local->ap->sta_table_lock);
2085
2086 if (sta == NULL) {
2087 /* add new AP */
2088 new_sta = 1;
2089 sta = ap_add_sta(local->ap, hdr->addr2);
2090 if (sta == NULL) {
2091 printk(KERN_INFO "prism2: kmalloc failed for AP "
2092 "data structure\n");
2093 return;
2094 }
2095 hostap_event_new_sta(local->dev, sta);
2096
2097 /* mark APs authentication and associated for pseudo ad-hoc
2098 * style communication */
2099 sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
2100
2101 if (local->ap->autom_ap_wds) {
2102 hostap_wds_link_oper(local, sta->addr, WDS_ADD);
2103 }
2104 }
2105
2106 sta->ap = 1;
2107 if (ssid) {
2108 sta->u.ap.ssid_len = ssid_len;
2109 memcpy(sta->u.ap.ssid, ssid, ssid_len);
2110 sta->u.ap.ssid[ssid_len] = '\0';
2111 } else {
2112 sta->u.ap.ssid_len = 0;
2113 sta->u.ap.ssid[0] = '\0';
2114 }
2115 sta->u.ap.channel = channel;
2116 sta->rx_packets++;
2117 sta->rx_bytes += len;
2118 sta->u.ap.last_beacon = sta->last_rx = jiffies;
2119 sta->capability = capability;
2120 sta->listen_interval = beacon_int;
2121
2122 atomic_dec(&sta->users);
2123
2124 if (new_sta) {
2125 memset(sta->supported_rates, 0, sizeof(sta->supported_rates));
2126 memcpy(sta->supported_rates, supp_rates, supp_rates_len);
2127 prism2_check_tx_rates(sta);
2128 }
2129 }
2130
2131 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2132
2133
2134 /* Called only as a tasklet. */
2135 static void handle_ap_item(local_info_t *local, struct sk_buff *skb,
2136 struct hostap_80211_rx_status *rx_stats)
2137 {
2138 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2139 struct net_device *dev = local->dev;
2140 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2141 u16 fc, type, stype;
2142 struct hostap_ieee80211_hdr *hdr;
2143
2144 /* FIX: should give skb->len to handler functions and check that the
2145 * buffer is long enough */
2146 hdr = (struct hostap_ieee80211_hdr *) skb->data;
2147 fc = le16_to_cpu(hdr->frame_control);
2148 type = WLAN_FC_GET_TYPE(fc);
2149 stype = WLAN_FC_GET_STYPE(fc);
2150
2151 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2152 if (!local->hostapd && type == WLAN_FC_TYPE_DATA) {
2153 PDEBUG(DEBUG_AP, "handle_ap_item - data frame\n");
2154
2155 if (!(fc & WLAN_FC_TODS) || (fc & WLAN_FC_FROMDS)) {
2156 if (stype == WLAN_FC_STYPE_NULLFUNC) {
2157 /* no ToDS nullfunc seems to be used to check
2158 * AP association; so send reject message to
2159 * speed up re-association */
2160 ap_handle_dropped_data(local, hdr);
2161 goto done;
2162 }
2163 PDEBUG(DEBUG_AP, " not ToDS frame (fc=0x%04x)\n",
2164 fc);
2165 goto done;
2166 }
2167
2168 if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN)) {
2169 PDEBUG(DEBUG_AP, "handle_ap_item - addr1(BSSID)="
2170 MACSTR " not own MAC\n",
2171 MAC2STR(hdr->addr1));
2172 goto done;
2173 }
2174
2175 if (local->ap->nullfunc_ack && stype == WLAN_FC_STYPE_NULLFUNC)
2176 ap_handle_data_nullfunc(local, hdr);
2177 else
2178 ap_handle_dropped_data(local, hdr);
2179 goto done;
2180 }
2181
2182 if (type == WLAN_FC_TYPE_MGMT && stype == WLAN_FC_STYPE_BEACON) {
2183 handle_beacon(local, skb, rx_stats);
2184 goto done;
2185 }
2186 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2187
2188 if (type == WLAN_FC_TYPE_CTRL && stype == WLAN_FC_STYPE_PSPOLL) {
2189 handle_pspoll(local, hdr, rx_stats);
2190 goto done;
2191 }
2192
2193 if (local->hostapd) {
2194 PDEBUG(DEBUG_AP, "Unknown frame in AP queue: type=0x%02x "
2195 "subtype=0x%02x\n", type, stype);
2196 goto done;
2197 }
2198
2199 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2200 if (type != WLAN_FC_TYPE_MGMT) {
2201 PDEBUG(DEBUG_AP, "handle_ap_item - not a management frame?\n");
2202 goto done;
2203 }
2204
2205 if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN)) {
2206 PDEBUG(DEBUG_AP, "handle_ap_item - addr1(DA)=" MACSTR
2207 " not own MAC\n", MAC2STR(hdr->addr1));
2208 goto done;
2209 }
2210
2211 if (memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN)) {
2212 PDEBUG(DEBUG_AP, "handle_ap_item - addr3(BSSID)=" MACSTR
2213 " not own MAC\n", MAC2STR(hdr->addr3));
2214 goto done;
2215 }
2216
2217 switch (stype) {
2218 case WLAN_FC_STYPE_ASSOC_REQ:
2219 handle_assoc(local, skb, rx_stats, 0);
2220 break;
2221 case WLAN_FC_STYPE_ASSOC_RESP:
2222 PDEBUG(DEBUG_AP, "==> ASSOC RESP (ignored)\n");
2223 break;
2224 case WLAN_FC_STYPE_REASSOC_REQ:
2225 handle_assoc(local, skb, rx_stats, 1);
2226 break;
2227 case WLAN_FC_STYPE_REASSOC_RESP:
2228 PDEBUG(DEBUG_AP, "==> REASSOC RESP (ignored)\n");
2229 break;
2230 case WLAN_FC_STYPE_ATIM:
2231 PDEBUG(DEBUG_AP, "==> ATIM (ignored)\n");
2232 break;
2233 case WLAN_FC_STYPE_DISASSOC:
2234 handle_disassoc(local, skb, rx_stats);
2235 break;
2236 case WLAN_FC_STYPE_AUTH:
2237 handle_authen(local, skb, rx_stats);
2238 break;
2239 case WLAN_FC_STYPE_DEAUTH:
2240 handle_deauth(local, skb, rx_stats);
2241 break;
2242 default:
2243 PDEBUG(DEBUG_AP, "Unknown mgmt frame subtype 0x%02x\n", stype);
2244 break;
2245 }
2246 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2247
2248 done:
2249 dev_kfree_skb(skb);
2250 }
2251
2252
2253 /* Called only as a tasklet (software IRQ) */
2254 void hostap_rx(struct net_device *dev, struct sk_buff *skb,
2255 struct hostap_80211_rx_status *rx_stats)
2256 {
2257 struct hostap_interface *iface;
2258 local_info_t *local;
2259 u16 fc;
2260 struct hostap_ieee80211_hdr *hdr;
2261
2262 iface = netdev_priv(dev);
2263 local = iface->local;
2264
2265 if (skb->len < 16)
2266 goto drop;
2267
2268 local->stats.rx_packets++;
2269
2270 hdr = (struct hostap_ieee80211_hdr *) skb->data;
2271 fc = le16_to_cpu(hdr->frame_control);
2272
2273 if (local->ap->ap_policy == AP_OTHER_AP_SKIP_ALL &&
2274 WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
2275 WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_BEACON)
2276 goto drop;
2277
2278 skb->protocol = __constant_htons(ETH_P_HOSTAP);
2279 handle_ap_item(local, skb, rx_stats);
2280 return;
2281
2282 drop:
2283 dev_kfree_skb(skb);
2284 }
2285
2286
2287 /* Called only as a tasklet (software IRQ) */
2288 static void schedule_packet_send(local_info_t *local, struct sta_info *sta)
2289 {
2290 struct sk_buff *skb;
2291 struct hostap_ieee80211_hdr *hdr;
2292 struct hostap_80211_rx_status rx_stats;
2293
2294 if (skb_queue_empty(&sta->tx_buf))
2295 return;
2296
2297 skb = dev_alloc_skb(16);
2298 if (skb == NULL) {
2299 printk(KERN_DEBUG "%s: schedule_packet_send: skb alloc "
2300 "failed\n", local->dev->name);
2301 return;
2302 }
2303
2304 hdr = (struct hostap_ieee80211_hdr *) skb_put(skb, 16);
2305
2306 /* Generate a fake pspoll frame to start packet delivery */
2307 hdr->frame_control = __constant_cpu_to_le16(
2308 (WLAN_FC_TYPE_CTRL << 2) | (WLAN_FC_STYPE_PSPOLL << 4));
2309 memcpy(hdr->addr1, local->dev->dev_addr, ETH_ALEN);
2310 memcpy(hdr->addr2, sta->addr, ETH_ALEN);
2311 hdr->duration_id = cpu_to_le16(sta->aid | BIT(15) | BIT(14));
2312
2313 PDEBUG(DEBUG_PS2, "%s: Scheduling buffered packet delivery for "
2314 "STA " MACSTR "\n", local->dev->name, MAC2STR(sta->addr));
2315
2316 skb->dev = local->dev;
2317
2318 memset(&rx_stats, 0, sizeof(rx_stats));
2319 hostap_rx(local->dev, skb, &rx_stats);
2320 }
2321
2322
2323 static int prism2_ap_get_sta_qual(local_info_t *local, struct sockaddr addr[],
2324 struct iw_quality qual[], int buf_size,
2325 int aplist)
2326 {
2327 struct ap_data *ap = local->ap;
2328 struct list_head *ptr;
2329 int count = 0;
2330
2331 spin_lock_bh(&ap->sta_table_lock);
2332
2333 for (ptr = ap->sta_list.next; ptr != NULL && ptr != &ap->sta_list;
2334 ptr = ptr->next) {
2335 struct sta_info *sta = (struct sta_info *) ptr;
2336
2337 if (aplist && !sta->ap)
2338 continue;
2339 addr[count].sa_family = ARPHRD_ETHER;
2340 memcpy(addr[count].sa_data, sta->addr, ETH_ALEN);
2341 if (sta->last_rx_silence == 0)
2342 qual[count].qual = sta->last_rx_signal < 27 ?
2343 0 : (sta->last_rx_signal - 27) * 92 / 127;
2344 else
2345 qual[count].qual = sta->last_rx_signal -
2346 sta->last_rx_silence - 35;
2347 qual[count].level = HFA384X_LEVEL_TO_dBm(sta->last_rx_signal);
2348 qual[count].noise = HFA384X_LEVEL_TO_dBm(sta->last_rx_silence);
2349 qual[count].updated = sta->last_rx_updated;
2350
2351 sta->last_rx_updated = 0;
2352
2353 count++;
2354 if (count >= buf_size)
2355 break;
2356 }
2357 spin_unlock_bh(&ap->sta_table_lock);
2358
2359 return count;
2360 }
2361
2362
2363 /* Translate our list of Access Points & Stations to a card independant
2364 * format that the Wireless Tools will understand - Jean II */
2365 static int prism2_ap_translate_scan(struct net_device *dev, char *buffer)
2366 {
2367 struct hostap_interface *iface;
2368 local_info_t *local;
2369 struct ap_data *ap;
2370 struct list_head *ptr;
2371 struct iw_event iwe;
2372 char *current_ev = buffer;
2373 char *end_buf = buffer + IW_SCAN_MAX_DATA;
2374 #if !defined(PRISM2_NO_KERNEL_IEEE80211_MGMT)
2375 char buf[64];
2376 #endif
2377
2378 iface = netdev_priv(dev);
2379 local = iface->local;
2380 ap = local->ap;
2381
2382 spin_lock_bh(&ap->sta_table_lock);
2383
2384 for (ptr = ap->sta_list.next; ptr != NULL && ptr != &ap->sta_list;
2385 ptr = ptr->next) {
2386 struct sta_info *sta = (struct sta_info *) ptr;
2387
2388 /* First entry *MUST* be the AP MAC address */
2389 memset(&iwe, 0, sizeof(iwe));
2390 iwe.cmd = SIOCGIWAP;
2391 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
2392 memcpy(iwe.u.ap_addr.sa_data, sta->addr, ETH_ALEN);
2393 iwe.len = IW_EV_ADDR_LEN;
2394 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2395 IW_EV_ADDR_LEN);
2396
2397 /* Use the mode to indicate if it's a station or
2398 * an Access Point */
2399 memset(&iwe, 0, sizeof(iwe));
2400 iwe.cmd = SIOCGIWMODE;
2401 if (sta->ap)
2402 iwe.u.mode = IW_MODE_MASTER;
2403 else
2404 iwe.u.mode = IW_MODE_INFRA;
2405 iwe.len = IW_EV_UINT_LEN;
2406 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2407 IW_EV_UINT_LEN);
2408
2409 /* Some quality */
2410 memset(&iwe, 0, sizeof(iwe));
2411 iwe.cmd = IWEVQUAL;
2412 if (sta->last_rx_silence == 0)
2413 iwe.u.qual.qual = sta->last_rx_signal < 27 ?
2414 0 : (sta->last_rx_signal - 27) * 92 / 127;
2415 else
2416 iwe.u.qual.qual = sta->last_rx_signal -
2417 sta->last_rx_silence - 35;
2418 iwe.u.qual.level = HFA384X_LEVEL_TO_dBm(sta->last_rx_signal);
2419 iwe.u.qual.noise = HFA384X_LEVEL_TO_dBm(sta->last_rx_silence);
2420 iwe.u.qual.updated = sta->last_rx_updated;
2421 iwe.len = IW_EV_QUAL_LEN;
2422 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2423 IW_EV_QUAL_LEN);
2424
2425 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2426 if (sta->ap) {
2427 memset(&iwe, 0, sizeof(iwe));
2428 iwe.cmd = SIOCGIWESSID;
2429 iwe.u.data.length = sta->u.ap.ssid_len;
2430 iwe.u.data.flags = 1;
2431 current_ev = iwe_stream_add_point(current_ev, end_buf,
2432 &iwe,
2433 sta->u.ap.ssid);
2434
2435 memset(&iwe, 0, sizeof(iwe));
2436 iwe.cmd = SIOCGIWENCODE;
2437 if (sta->capability & WLAN_CAPABILITY_PRIVACY)
2438 iwe.u.data.flags =
2439 IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
2440 else
2441 iwe.u.data.flags = IW_ENCODE_DISABLED;
2442 current_ev = iwe_stream_add_point(current_ev, end_buf,
2443 &iwe,
2444 sta->u.ap.ssid
2445 /* 0 byte memcpy */);
2446
2447 if (sta->u.ap.channel > 0 &&
2448 sta->u.ap.channel <= FREQ_COUNT) {
2449 memset(&iwe, 0, sizeof(iwe));
2450 iwe.cmd = SIOCGIWFREQ;
2451 iwe.u.freq.m = freq_list[sta->u.ap.channel - 1]
2452 * 100000;
2453 iwe.u.freq.e = 1;
2454 current_ev = iwe_stream_add_event(
2455 current_ev, end_buf, &iwe,
2456 IW_EV_FREQ_LEN);
2457 }
2458
2459 memset(&iwe, 0, sizeof(iwe));
2460 iwe.cmd = IWEVCUSTOM;
2461 sprintf(buf, "beacon_interval=%d",
2462 sta->listen_interval);
2463 iwe.u.data.length = strlen(buf);
2464 current_ev = iwe_stream_add_point(current_ev, end_buf,
2465 &iwe, buf);
2466 }
2467 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2468
2469 sta->last_rx_updated = 0;
2470
2471 /* To be continued, we should make good use of IWEVCUSTOM */
2472 }
2473
2474 spin_unlock_bh(&ap->sta_table_lock);
2475
2476 return current_ev - buffer;
2477 }
2478
2479
2480 static int prism2_hostapd_add_sta(struct ap_data *ap,
2481 struct prism2_hostapd_param *param)
2482 {
2483 struct sta_info *sta;
2484
2485 spin_lock_bh(&ap->sta_table_lock);
2486 sta = ap_get_sta(ap, param->sta_addr);
2487 if (sta)
2488 atomic_inc(&sta->users);
2489 spin_unlock_bh(&ap->sta_table_lock);
2490
2491 if (sta == NULL) {
2492 sta = ap_add_sta(ap, param->sta_addr);
2493 if (sta == NULL)
2494 return -1;
2495 }
2496
2497 if (!(sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
2498 hostap_event_new_sta(sta->local->dev, sta);
2499
2500 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC;
2501 sta->last_rx = jiffies;
2502 sta->aid = param->u.add_sta.aid;
2503 sta->capability = param->u.add_sta.capability;
2504 sta->tx_supp_rates = param->u.add_sta.tx_supp_rates;
2505 if (sta->tx_supp_rates & WLAN_RATE_1M)
2506 sta->supported_rates[0] = 2;
2507 if (sta->tx_supp_rates & WLAN_RATE_2M)
2508 sta->supported_rates[1] = 4;
2509 if (sta->tx_supp_rates & WLAN_RATE_5M5)
2510 sta->supported_rates[2] = 11;
2511 if (sta->tx_supp_rates & WLAN_RATE_11M)
2512 sta->supported_rates[3] = 22;
2513 prism2_check_tx_rates(sta);
2514 atomic_dec(&sta->users);
2515 return 0;
2516 }
2517
2518
2519 static int prism2_hostapd_remove_sta(struct ap_data *ap,
2520 struct prism2_hostapd_param *param)
2521 {
2522 struct sta_info *sta;
2523
2524 spin_lock_bh(&ap->sta_table_lock);
2525 sta = ap_get_sta(ap, param->sta_addr);
2526 if (sta) {
2527 ap_sta_hash_del(ap, sta);
2528 list_del(&sta->list);
2529 }
2530 spin_unlock_bh(&ap->sta_table_lock);
2531
2532 if (!sta)
2533 return -ENOENT;
2534
2535 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
2536 hostap_event_expired_sta(sta->local->dev, sta);
2537 ap_free_sta(ap, sta);
2538
2539 return 0;
2540 }
2541
2542
2543 static int prism2_hostapd_get_info_sta(struct ap_data *ap,
2544 struct prism2_hostapd_param *param)
2545 {
2546 struct sta_info *sta;
2547
2548 spin_lock_bh(&ap->sta_table_lock);
2549 sta = ap_get_sta(ap, param->sta_addr);
2550 if (sta)
2551 atomic_inc(&sta->users);
2552 spin_unlock_bh(&ap->sta_table_lock);
2553
2554 if (!sta)
2555 return -ENOENT;
2556
2557 param->u.get_info_sta.inactive_sec = (jiffies - sta->last_rx) / HZ;
2558
2559 atomic_dec(&sta->users);
2560
2561 return 1;
2562 }
2563
2564
2565 static int prism2_hostapd_set_flags_sta(struct ap_data *ap,
2566 struct prism2_hostapd_param *param)
2567 {
2568 struct sta_info *sta;
2569
2570 spin_lock_bh(&ap->sta_table_lock);
2571 sta = ap_get_sta(ap, param->sta_addr);
2572 if (sta) {
2573 sta->flags |= param->u.set_flags_sta.flags_or;
2574 sta->flags &= param->u.set_flags_sta.flags_and;
2575 }
2576 spin_unlock_bh(&ap->sta_table_lock);
2577
2578 if (!sta)
2579 return -ENOENT;
2580
2581 return 0;
2582 }
2583
2584
2585 static int prism2_hostapd_sta_clear_stats(struct ap_data *ap,
2586 struct prism2_hostapd_param *param)
2587 {
2588 struct sta_info *sta;
2589 int rate;
2590
2591 spin_lock_bh(&ap->sta_table_lock);
2592 sta = ap_get_sta(ap, param->sta_addr);
2593 if (sta) {
2594 sta->rx_packets = sta->tx_packets = 0;
2595 sta->rx_bytes = sta->tx_bytes = 0;
2596 for (rate = 0; rate < WLAN_RATE_COUNT; rate++) {
2597 sta->tx_count[rate] = 0;
2598 sta->rx_count[rate] = 0;
2599 }
2600 }
2601 spin_unlock_bh(&ap->sta_table_lock);
2602
2603 if (!sta)
2604 return -ENOENT;
2605
2606 return 0;
2607 }
2608
2609
2610 static int prism2_hostapd(struct ap_data *ap,
2611 struct prism2_hostapd_param *param)
2612 {
2613 switch (param->cmd) {
2614 case PRISM2_HOSTAPD_FLUSH:
2615 ap_control_kickall(ap);
2616 return 0;
2617 case PRISM2_HOSTAPD_ADD_STA:
2618 return prism2_hostapd_add_sta(ap, param);
2619 case PRISM2_HOSTAPD_REMOVE_STA:
2620 return prism2_hostapd_remove_sta(ap, param);
2621 case PRISM2_HOSTAPD_GET_INFO_STA:
2622 return prism2_hostapd_get_info_sta(ap, param);
2623 case PRISM2_HOSTAPD_SET_FLAGS_STA:
2624 return prism2_hostapd_set_flags_sta(ap, param);
2625 case PRISM2_HOSTAPD_STA_CLEAR_STATS:
2626 return prism2_hostapd_sta_clear_stats(ap, param);
2627 default:
2628 printk(KERN_WARNING "prism2_hostapd: unknown cmd=%d\n",
2629 param->cmd);
2630 return -EOPNOTSUPP;
2631 }
2632 }
2633
2634
2635 /* Update station info for host-based TX rate control and return current
2636 * TX rate */
2637 static int ap_update_sta_tx_rate(struct sta_info *sta, struct net_device *dev)
2638 {
2639 int ret = sta->tx_rate;
2640 struct hostap_interface *iface;
2641 local_info_t *local;
2642
2643 iface = netdev_priv(dev);
2644 local = iface->local;
2645
2646 sta->tx_count[sta->tx_rate_idx]++;
2647 sta->tx_since_last_failure++;
2648 sta->tx_consecutive_exc = 0;
2649 if (sta->tx_since_last_failure >= WLAN_RATE_UPDATE_COUNT &&
2650 sta->tx_rate_idx < sta->tx_max_rate) {
2651 /* use next higher rate */
2652 int old_rate, new_rate;
2653 old_rate = new_rate = sta->tx_rate_idx;
2654 while (new_rate < sta->tx_max_rate) {
2655 new_rate++;
2656 if (ap_tx_rate_ok(new_rate, sta, local)) {
2657 sta->tx_rate_idx = new_rate;
2658 break;
2659 }
2660 }
2661 if (old_rate != sta->tx_rate_idx) {
2662 switch (sta->tx_rate_idx) {
2663 case 0: sta->tx_rate = 10; break;
2664 case 1: sta->tx_rate = 20; break;
2665 case 2: sta->tx_rate = 55; break;
2666 case 3: sta->tx_rate = 110; break;
2667 default: sta->tx_rate = 0; break;
2668 }
2669 PDEBUG(DEBUG_AP, "%s: STA " MACSTR " TX rate raised to"
2670 " %d\n", dev->name, MAC2STR(sta->addr),
2671 sta->tx_rate);
2672 }
2673 sta->tx_since_last_failure = 0;
2674 }
2675
2676 return ret;
2677 }
2678
2679
2680 /* Called only from software IRQ. Called for each TX frame prior possible
2681 * encryption and transmit. */
2682 ap_tx_ret hostap_handle_sta_tx(local_info_t *local, struct hostap_tx_data *tx)
2683 {
2684 struct sta_info *sta = NULL;
2685 struct sk_buff *skb = tx->skb;
2686 int set_tim, ret;
2687 struct hostap_ieee80211_hdr *hdr;
2688 struct hostap_skb_tx_data *meta;
2689
2690 meta = (struct hostap_skb_tx_data *) skb->cb;
2691 ret = AP_TX_CONTINUE;
2692 if (local->ap == NULL || skb->len < 10 ||
2693 meta->iface->type == HOSTAP_INTERFACE_STA)
2694 goto out;
2695
2696 hdr = (struct hostap_ieee80211_hdr *) skb->data;
2697
2698 if (hdr->addr1[0] & 0x01) {
2699 /* broadcast/multicast frame - no AP related processing */
2700 goto out;
2701 }
2702
2703 /* unicast packet - check whether destination STA is associated */
2704 spin_lock(&local->ap->sta_table_lock);
2705 sta = ap_get_sta(local->ap, hdr->addr1);
2706 if (sta)
2707 atomic_inc(&sta->users);
2708 spin_unlock(&local->ap->sta_table_lock);
2709
2710 if (local->iw_mode == IW_MODE_MASTER && sta == NULL && !meta->wds &&
2711 meta->iface->type != HOSTAP_INTERFACE_MASTER &&
2712 meta->iface->type != HOSTAP_INTERFACE_AP) {
2713 #if 0
2714 /* This can happen, e.g., when wlan0 is added to a bridge and
2715 * bridging code does not know which port is the correct target
2716 * for a unicast frame. In this case, the packet is send to all
2717 * ports of the bridge. Since this is a valid scenario, do not
2718 * print out any errors here. */
2719 if (net_ratelimit()) {
2720 printk(KERN_DEBUG "AP: drop packet to non-associated "
2721 "STA " MACSTR "\n", MAC2STR(hdr->addr1));
2722 }
2723 #endif
2724 local->ap->tx_drop_nonassoc++;
2725 ret = AP_TX_DROP;
2726 goto out;
2727 }
2728
2729 if (sta == NULL)
2730 goto out;
2731
2732 if (!(sta->flags & WLAN_STA_AUTHORIZED))
2733 ret = AP_TX_CONTINUE_NOT_AUTHORIZED;
2734
2735 /* Set tx_rate if using host-based TX rate control */
2736 if (!local->fw_tx_rate_control)
2737 local->ap->last_tx_rate = meta->rate =
2738 ap_update_sta_tx_rate(sta, local->dev);
2739
2740 if (local->iw_mode != IW_MODE_MASTER)
2741 goto out;
2742
2743 if (!(sta->flags & WLAN_STA_PS))
2744 goto out;
2745
2746 if (memcmp(skb->cb, AP_SKB_CB_MAGIC, AP_SKB_CB_MAGIC_LEN) == 0) {
2747 if (skb->cb[AP_SKB_CB_MAGIC_LEN] & AP_SKB_CB_ADD_MOREDATA) {
2748 /* indicate to STA that more frames follow */
2749 hdr->frame_control |=
2750 __constant_cpu_to_le16(WLAN_FC_MOREDATA);
2751 }
2752
2753 if (skb->cb[AP_SKB_CB_MAGIC_LEN] & AP_SKB_CB_BUFFERED_FRAME) {
2754 /* packet was already buffered and now send due to
2755 * PS poll, so do not rebuffer it */
2756 goto out;
2757 }
2758 }
2759
2760 if (skb_queue_len(&sta->tx_buf) >= STA_MAX_TX_BUFFER) {
2761 PDEBUG(DEBUG_PS, "%s: No more space in STA (" MACSTR ")'s PS "
2762 "mode buffer\n", local->dev->name, MAC2STR(sta->addr));
2763 /* Make sure that TIM is set for the station (it might not be
2764 * after AP wlan hw reset). */
2765 /* FIX: should fix hw reset to restore bits based on STA
2766 * buffer state.. */
2767 hostap_set_tim(local, sta->aid, 1);
2768 sta->flags |= WLAN_STA_TIM;
2769 ret = AP_TX_DROP;
2770 goto out;
2771 }
2772
2773 /* STA in PS mode, buffer frame for later delivery */
2774 set_tim = skb_queue_empty(&sta->tx_buf);
2775 skb_queue_tail(&sta->tx_buf, skb);
2776 /* FIX: could save RX time to skb and expire buffered frames after
2777 * some time if STA does not poll for them */
2778
2779 if (set_tim) {
2780 if (sta->flags & WLAN_STA_TIM)
2781 PDEBUG(DEBUG_PS2, "Re-setting TIM for aid %d\n",
2782 sta->aid);
2783 hostap_set_tim(local, sta->aid, 1);
2784 sta->flags |= WLAN_STA_TIM;
2785 }
2786
2787 ret = AP_TX_BUFFERED;
2788
2789 out:
2790 if (sta != NULL) {
2791 if (ret == AP_TX_CONTINUE ||
2792 ret == AP_TX_CONTINUE_NOT_AUTHORIZED) {
2793 sta->tx_packets++;
2794 sta->tx_bytes += skb->len;
2795 sta->last_tx = jiffies;
2796 }
2797
2798 if ((ret == AP_TX_CONTINUE ||
2799 ret == AP_TX_CONTINUE_NOT_AUTHORIZED) &&
2800 sta->crypt && tx->host_encrypt) {
2801 tx->crypt = sta->crypt;
2802 tx->sta_ptr = sta; /* hostap_handle_sta_release() will
2803 * be called to release sta info
2804 * later */
2805 } else
2806 atomic_dec(&sta->users);
2807 }
2808
2809 return ret;
2810 }
2811
2812
2813 void hostap_handle_sta_release(void *ptr)
2814 {
2815 struct sta_info *sta = ptr;
2816 atomic_dec(&sta->users);
2817 }
2818
2819
2820 /* Called only as a tasklet (software IRQ) */
2821 void hostap_handle_sta_tx_exc(local_info_t *local, struct sk_buff *skb)
2822 {
2823 struct sta_info *sta;
2824 struct hostap_ieee80211_hdr *hdr;
2825 struct hostap_skb_tx_data *meta;
2826
2827 hdr = (struct hostap_ieee80211_hdr *) skb->data;
2828 meta = (struct hostap_skb_tx_data *) skb->cb;
2829
2830 spin_lock(&local->ap->sta_table_lock);
2831 sta = ap_get_sta(local->ap, hdr->addr1);
2832 if (!sta) {
2833 spin_unlock(&local->ap->sta_table_lock);
2834 PDEBUG(DEBUG_AP, "%s: Could not find STA " MACSTR " for this "
2835 "TX error (@%lu)\n",
2836 local->dev->name, MAC2STR(hdr->addr1), jiffies);
2837 return;
2838 }
2839
2840 sta->tx_since_last_failure = 0;
2841 sta->tx_consecutive_exc++;
2842
2843 if (sta->tx_consecutive_exc >= WLAN_RATE_DECREASE_THRESHOLD &&
2844 sta->tx_rate_idx > 0 && meta->rate <= sta->tx_rate) {
2845 /* use next lower rate */
2846 int old, rate;
2847 old = rate = sta->tx_rate_idx;
2848 while (rate > 0) {
2849 rate--;
2850 if (ap_tx_rate_ok(rate, sta, local)) {
2851 sta->tx_rate_idx = rate;
2852 break;
2853 }
2854 }
2855 if (old != sta->tx_rate_idx) {
2856 switch (sta->tx_rate_idx) {
2857 case 0: sta->tx_rate = 10; break;
2858 case 1: sta->tx_rate = 20; break;
2859 case 2: sta->tx_rate = 55; break;
2860 case 3: sta->tx_rate = 110; break;
2861 default: sta->tx_rate = 0; break;
2862 }
2863 PDEBUG(DEBUG_AP, "%s: STA " MACSTR " TX rate lowered "
2864 "to %d\n", local->dev->name, MAC2STR(sta->addr),
2865 sta->tx_rate);
2866 }
2867 sta->tx_consecutive_exc = 0;
2868 }
2869 spin_unlock(&local->ap->sta_table_lock);
2870 }
2871
2872
2873 static void hostap_update_sta_ps2(local_info_t *local, struct sta_info *sta,
2874 int pwrmgt, int type, int stype)
2875 {
2876 if (pwrmgt && !(sta->flags & WLAN_STA_PS)) {
2877 sta->flags |= WLAN_STA_PS;
2878 PDEBUG(DEBUG_PS2, "STA " MACSTR " changed to use PS "
2879 "mode (type=0x%02X, stype=0x%02X)\n",
2880 MAC2STR(sta->addr), type, stype);
2881 } else if (!pwrmgt && (sta->flags & WLAN_STA_PS)) {
2882 sta->flags &= ~WLAN_STA_PS;
2883 PDEBUG(DEBUG_PS2, "STA " MACSTR " changed to not use "
2884 "PS mode (type=0x%02X, stype=0x%02X)\n",
2885 MAC2STR(sta->addr), type, stype);
2886 if (type != WLAN_FC_TYPE_CTRL || stype != WLAN_FC_STYPE_PSPOLL)
2887 schedule_packet_send(local, sta);
2888 }
2889 }
2890
2891
2892 /* Called only as a tasklet (software IRQ). Called for each RX frame to update
2893 * STA power saving state. pwrmgt is a flag from 802.11 frame_control field. */
2894 int hostap_update_sta_ps(local_info_t *local, struct hostap_ieee80211_hdr *hdr)
2895 {
2896 struct sta_info *sta;
2897 u16 fc;
2898
2899 spin_lock(&local->ap->sta_table_lock);
2900 sta = ap_get_sta(local->ap, hdr->addr2);
2901 if (sta)
2902 atomic_inc(&sta->users);
2903 spin_unlock(&local->ap->sta_table_lock);
2904
2905 if (!sta)
2906 return -1;
2907
2908 fc = le16_to_cpu(hdr->frame_control);
2909 hostap_update_sta_ps2(local, sta, fc & WLAN_FC_PWRMGT,
2910 WLAN_FC_GET_TYPE(fc), WLAN_FC_GET_STYPE(fc));
2911
2912 atomic_dec(&sta->users);
2913 return 0;
2914 }
2915
2916
2917 /* Called only as a tasklet (software IRQ). Called for each RX frame after
2918 * getting RX header and payload from hardware. */
2919 ap_rx_ret hostap_handle_sta_rx(local_info_t *local, struct net_device *dev,
2920 struct sk_buff *skb,
2921 struct hostap_80211_rx_status *rx_stats,
2922 int wds)
2923 {
2924 int ret;
2925 struct sta_info *sta;
2926 u16 fc, type, stype;
2927 struct hostap_ieee80211_hdr *hdr;
2928
2929 if (local->ap == NULL)
2930 return AP_RX_CONTINUE;
2931
2932 hdr = (struct hostap_ieee80211_hdr *) skb->data;
2933
2934 fc = le16_to_cpu(hdr->frame_control);
2935 type = WLAN_FC_GET_TYPE(fc);
2936 stype = WLAN_FC_GET_STYPE(fc);
2937
2938 spin_lock(&local->ap->sta_table_lock);
2939 sta = ap_get_sta(local->ap, hdr->addr2);
2940 if (sta)
2941 atomic_inc(&sta->users);
2942 spin_unlock(&local->ap->sta_table_lock);
2943
2944 if (sta && !(sta->flags & WLAN_STA_AUTHORIZED))
2945 ret = AP_RX_CONTINUE_NOT_AUTHORIZED;
2946 else
2947 ret = AP_RX_CONTINUE;
2948
2949
2950 if (fc & WLAN_FC_TODS) {
2951 if (!wds && (sta == NULL || !(sta->flags & WLAN_STA_ASSOC))) {
2952 if (local->hostapd) {
2953 prism2_rx_80211(local->apdev, skb, rx_stats,
2954 PRISM2_RX_NON_ASSOC);
2955 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2956 } else {
2957 printk(KERN_DEBUG "%s: dropped received packet"
2958 " from non-associated STA " MACSTR
2959 " (type=0x%02x, subtype=0x%02x)\n",
2960 dev->name, MAC2STR(hdr->addr2), type,
2961 stype);
2962 hostap_rx(dev, skb, rx_stats);
2963 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2964 }
2965 ret = AP_RX_EXIT;
2966 goto out;
2967 }
2968 } else if (fc & WLAN_FC_FROMDS) {
2969 if (!wds) {
2970 /* FromDS frame - not for us; probably
2971 * broadcast/multicast in another BSS - drop */
2972 if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
2973 printk(KERN_DEBUG "Odd.. FromDS packet "
2974 "received with own BSSID\n");
2975 hostap_dump_rx_80211(dev->name, skb, rx_stats);
2976 }
2977 ret = AP_RX_DROP;
2978 goto out;
2979 }
2980 } else if (stype == WLAN_FC_STYPE_NULLFUNC && sta == NULL &&
2981 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
2982
2983 if (local->hostapd) {
2984 prism2_rx_80211(local->apdev, skb, rx_stats,
2985 PRISM2_RX_NON_ASSOC);
2986 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2987 } else {
2988 /* At least Lucent f/w seems to send data::nullfunc
2989 * frames with no ToDS flag when the current AP returns
2990 * after being unavailable for some time. Speed up
2991 * re-association by informing the station about it not
2992 * being associated. */
2993 printk(KERN_DEBUG "%s: rejected received nullfunc "
2994 "frame without ToDS from not associated STA "
2995 MACSTR "\n",
2996 dev->name, MAC2STR(hdr->addr2));
2997 hostap_rx(dev, skb, rx_stats);
2998 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2999 }
3000 ret = AP_RX_EXIT;
3001 goto out;
3002 } else if (stype == WLAN_FC_STYPE_NULLFUNC) {
3003 /* At least Lucent cards seem to send periodic nullfunc
3004 * frames with ToDS. Let these through to update SQ
3005 * stats and PS state. Nullfunc frames do not contain
3006 * any data and they will be dropped below. */
3007 } else {
3008 /* If BSSID (Addr3) is foreign, this frame is a normal
3009 * broadcast frame from an IBSS network. Drop it silently.
3010 * If BSSID is own, report the dropping of this frame. */
3011 if (memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
3012 printk(KERN_DEBUG "%s: dropped received packet from "
3013 MACSTR " with no ToDS flag (type=0x%02x, "
3014 "subtype=0x%02x)\n", dev->name,
3015 MAC2STR(hdr->addr2), type, stype);
3016 hostap_dump_rx_80211(dev->name, skb, rx_stats);
3017 }
3018 ret = AP_RX_DROP;
3019 goto out;
3020 }
3021
3022 if (sta) {
3023 hostap_update_sta_ps2(local, sta, fc & WLAN_FC_PWRMGT,
3024 type, stype);
3025
3026 sta->rx_packets++;
3027 sta->rx_bytes += skb->len;
3028 sta->last_rx = jiffies;
3029 }
3030
3031 if (local->ap->nullfunc_ack && stype == WLAN_FC_STYPE_NULLFUNC &&
3032 fc & WLAN_FC_TODS) {
3033 if (local->hostapd) {
3034 prism2_rx_80211(local->apdev, skb, rx_stats,
3035 PRISM2_RX_NULLFUNC_ACK);
3036 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
3037 } else {
3038 /* some STA f/w's seem to require control::ACK frame
3039 * for data::nullfunc, but Prism2 f/w 0.8.0 (at least
3040 * from Compaq) does not send this.. Try to generate
3041 * ACK for these frames from the host driver to make
3042 * power saving work with, e.g., Lucent WaveLAN f/w */
3043 hostap_rx(dev, skb, rx_stats);
3044 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
3045 }
3046 ret = AP_RX_EXIT;
3047 goto out;
3048 }
3049
3050 out:
3051 if (sta)
3052 atomic_dec(&sta->users);
3053
3054 return ret;
3055 }
3056
3057
3058 /* Called only as a tasklet (software IRQ) */
3059 int hostap_handle_sta_crypto(local_info_t *local,
3060 struct hostap_ieee80211_hdr *hdr,
3061 struct prism2_crypt_data **crypt, void **sta_ptr)
3062 {
3063 struct sta_info *sta;
3064
3065 spin_lock(&local->ap->sta_table_lock);
3066 sta = ap_get_sta(local->ap, hdr->addr2);
3067 if (sta)
3068 atomic_inc(&sta->users);
3069 spin_unlock(&local->ap->sta_table_lock);
3070
3071 if (!sta)
3072 return -1;
3073
3074 if (sta->crypt) {
3075 *crypt = sta->crypt;
3076 *sta_ptr = sta;
3077 /* hostap_handle_sta_release() will be called to release STA
3078 * info */
3079 } else
3080 atomic_dec(&sta->users);
3081
3082 return 0;
3083 }
3084
3085
3086 /* Called only as a tasklet (software IRQ) */
3087 int hostap_is_sta_assoc(struct ap_data *ap, u8 *sta_addr)
3088 {
3089 struct sta_info *sta;
3090 int ret = 0;
3091
3092 spin_lock(&ap->sta_table_lock);
3093 sta = ap_get_sta(ap, sta_addr);
3094 if (sta != NULL && (sta->flags & WLAN_STA_ASSOC) && !sta->ap)
3095 ret = 1;
3096 spin_unlock(&ap->sta_table_lock);
3097
3098 return ret;
3099 }
3100
3101
3102 /* Called only as a tasklet (software IRQ) */
3103 int hostap_is_sta_authorized(struct ap_data *ap, u8 *sta_addr)
3104 {
3105 struct sta_info *sta;
3106 int ret = 0;
3107
3108 spin_lock(&ap->sta_table_lock);
3109 sta = ap_get_sta(ap, sta_addr);
3110 if (sta != NULL && (sta->flags & WLAN_STA_ASSOC) && !sta->ap &&
3111 ((sta->flags & WLAN_STA_AUTHORIZED) ||
3112 ap->local->ieee_802_1x == 0))
3113 ret = 1;
3114 spin_unlock(&ap->sta_table_lock);
3115
3116 return ret;
3117 }
3118
3119
3120 /* Called only as a tasklet (software IRQ) */
3121 int hostap_add_sta(struct ap_data *ap, u8 *sta_addr)
3122 {
3123 struct sta_info *sta;
3124 int ret = 1;
3125
3126 if (!ap)
3127 return -1;
3128
3129 spin_lock(&ap->sta_table_lock);
3130 sta = ap_get_sta(ap, sta_addr);
3131 if (sta)
3132 ret = 0;
3133 spin_unlock(&ap->sta_table_lock);
3134
3135 if (ret == 1) {
3136 sta = ap_add_sta(ap, sta_addr);
3137 if (!sta)
3138 ret = -1;
3139 sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
3140 sta->ap = 1;
3141 memset(sta->supported_rates, 0, sizeof(sta->supported_rates));
3142 /* No way of knowing which rates are supported since we did not
3143 * get supported rates element from beacon/assoc req. Assume
3144 * that remote end supports all 802.11b rates. */
3145 sta->supported_rates[0] = 0x82;
3146 sta->supported_rates[1] = 0x84;
3147 sta->supported_rates[2] = 0x0b;
3148 sta->supported_rates[3] = 0x16;
3149 sta->tx_supp_rates = WLAN_RATE_1M | WLAN_RATE_2M |
3150 WLAN_RATE_5M5 | WLAN_RATE_11M;
3151 sta->tx_rate = 110;
3152 sta->tx_max_rate = sta->tx_rate_idx = 3;
3153 }
3154
3155 return ret;
3156 }
3157
3158
3159 /* Called only as a tasklet (software IRQ) */
3160 int hostap_update_rx_stats(struct ap_data *ap,
3161 struct hostap_ieee80211_hdr *hdr,
3162 struct hostap_80211_rx_status *rx_stats)
3163 {
3164 struct sta_info *sta;
3165
3166 if (!ap)
3167 return -1;
3168
3169 spin_lock(&ap->sta_table_lock);
3170 sta = ap_get_sta(ap, hdr->addr2);
3171 if (sta) {
3172 sta->last_rx_silence = rx_stats->noise;
3173 sta->last_rx_signal = rx_stats->signal;
3174 sta->last_rx_rate = rx_stats->rate;
3175 sta->last_rx_updated = 7;
3176 if (rx_stats->rate == 10)
3177 sta->rx_count[0]++;
3178 else if (rx_stats->rate == 20)
3179 sta->rx_count[1]++;
3180 else if (rx_stats->rate == 55)
3181 sta->rx_count[2]++;
3182 else if (rx_stats->rate == 110)
3183 sta->rx_count[3]++;
3184 }
3185 spin_unlock(&ap->sta_table_lock);
3186
3187 return sta ? 0 : -1;
3188 }
3189
3190
3191 void hostap_update_rates(local_info_t *local)
3192 {
3193 struct list_head *ptr;
3194 struct ap_data *ap = local->ap;
3195
3196 if (!ap)
3197 return;
3198
3199 spin_lock_bh(&ap->sta_table_lock);
3200 for (ptr = ap->sta_list.next; ptr != &ap->sta_list; ptr = ptr->next) {
3201 struct sta_info *sta = (struct sta_info *) ptr;
3202 prism2_check_tx_rates(sta);
3203 }
3204 spin_unlock_bh(&ap->sta_table_lock);
3205 }
3206
3207
3208 static void * ap_crypt_get_ptrs(struct ap_data *ap, u8 *addr, int permanent,
3209 struct prism2_crypt_data ***crypt)
3210 {
3211 struct sta_info *sta;
3212
3213 spin_lock_bh(&ap->sta_table_lock);
3214 sta = ap_get_sta(ap, addr);
3215 if (sta)
3216 atomic_inc(&sta->users);
3217 spin_unlock_bh(&ap->sta_table_lock);
3218
3219 if (!sta && permanent)
3220 sta = ap_add_sta(ap, addr);
3221
3222 if (!sta)
3223 return NULL;
3224
3225 if (permanent)
3226 sta->flags |= WLAN_STA_PERM;
3227
3228 *crypt = &sta->crypt;
3229
3230 return sta;
3231 }
3232
3233
3234 void hostap_add_wds_links(local_info_t *local)
3235 {
3236 struct ap_data *ap = local->ap;
3237 struct list_head *ptr;
3238
3239 spin_lock_bh(&ap->sta_table_lock);
3240 list_for_each(ptr, &ap->sta_list) {
3241 struct sta_info *sta = list_entry(ptr, struct sta_info, list);
3242 if (sta->ap)
3243 hostap_wds_link_oper(local, sta->addr, WDS_ADD);
3244 }
3245 spin_unlock_bh(&ap->sta_table_lock);
3246
3247 schedule_work(&local->ap->wds_oper_queue);
3248 }
3249
3250
3251 void hostap_wds_link_oper(local_info_t *local, u8 *addr, wds_oper_type type)
3252 {
3253 struct wds_oper_data *entry;
3254
3255 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
3256 if (!entry)
3257 return;
3258 memcpy(entry->addr, addr, ETH_ALEN);
3259 entry->type = type;
3260 spin_lock_bh(&local->lock);
3261 entry->next = local->ap->wds_oper_entries;
3262 local->ap->wds_oper_entries = entry;
3263 spin_unlock_bh(&local->lock);
3264
3265 schedule_work(&local->ap->wds_oper_queue);
3266 }
3267
3268
3269 EXPORT_SYMBOL(hostap_init_data);
3270 EXPORT_SYMBOL(hostap_init_ap_proc);
3271 EXPORT_SYMBOL(hostap_free_data);
3272 EXPORT_SYMBOL(hostap_check_sta_fw_version);
3273 EXPORT_SYMBOL(hostap_handle_sta_tx);
3274 EXPORT_SYMBOL(hostap_handle_sta_release);
3275 EXPORT_SYMBOL(hostap_handle_sta_tx_exc);
3276 EXPORT_SYMBOL(hostap_update_sta_ps);
3277 EXPORT_SYMBOL(hostap_handle_sta_rx);
3278 EXPORT_SYMBOL(hostap_is_sta_assoc);
3279 EXPORT_SYMBOL(hostap_is_sta_authorized);
3280 EXPORT_SYMBOL(hostap_add_sta);
3281 EXPORT_SYMBOL(hostap_update_rates);
3282 EXPORT_SYMBOL(hostap_add_wds_links);
3283 EXPORT_SYMBOL(hostap_wds_link_oper);
3284 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
3285 EXPORT_SYMBOL(hostap_deauth_all_stas);
3286 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
Linux kernel - Deliverables
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