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GUI: Fix Tomato RAF theme for all builds. Compilation typo.
[tomato.git] / release / src-rt-6.x.4708 / linux / linux-2.6.36 / drivers / net / wireless / hostap / hostap_ap.c
blob12b4937b68d20f97345783024af94d0df8e7ac7f
1 /*
2 * Intersil Prism2 driver with Host AP (software access point) support
3 * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
4 * <j@w1.fi>
5 * Copyright (c) 2002-2005, Jouni Malinen <j@w1.fi>
6 *
7 * This file is to be included into hostap.c when S/W AP functionality is
8 * compiled.
9 *
10 * AP: FIX:
11 * - if unicast Class 2 (assoc,reassoc,disassoc) frame received from
12 * unauthenticated STA, send deauth. frame (8802.11: 5.5)
13 * - if unicast Class 3 (data with to/from DS,deauth,pspoll) frame received
14 * from authenticated, but unassoc STA, send disassoc frame (8802.11: 5.5)
15 * - if unicast Class 3 received from unauthenticated STA, send deauth. frame
16 * (8802.11: 5.5)
17 */
18
19 #include <linux/proc_fs.h>
20 #include <linux/delay.h>
21 #include <linux/random.h>
22 #include <linux/if_arp.h>
23 #include <linux/slab.h>
24
25 #include "hostap_wlan.h"
26 #include "hostap.h"
27 #include "hostap_ap.h"
28
29 static int other_ap_policy[MAX_PARM_DEVICES] = { AP_OTHER_AP_SKIP_ALL,
30 DEF_INTS };
31 module_param_array(other_ap_policy, int, NULL, 0444);
32 MODULE_PARM_DESC(other_ap_policy, "Other AP beacon monitoring policy (0-3)");
33
34 static int ap_max_inactivity[MAX_PARM_DEVICES] = { AP_MAX_INACTIVITY_SEC,
35 DEF_INTS };
36 module_param_array(ap_max_inactivity, int, NULL, 0444);
37 MODULE_PARM_DESC(ap_max_inactivity, "AP timeout (in seconds) for station "
38 "inactivity");
39
40 static int ap_bridge_packets[MAX_PARM_DEVICES] = { 1, DEF_INTS };
41 module_param_array(ap_bridge_packets, int, NULL, 0444);
42 MODULE_PARM_DESC(ap_bridge_packets, "Bridge packets directly between "
43 "stations");
44
45 static int autom_ap_wds[MAX_PARM_DEVICES] = { 0, DEF_INTS };
46 module_param_array(autom_ap_wds, int, NULL, 0444);
47 MODULE_PARM_DESC(autom_ap_wds, "Add WDS connections to other APs "
48 "automatically");
49
50
51 static struct sta_info* ap_get_sta(struct ap_data *ap, u8 *sta);
52 static void hostap_event_expired_sta(struct net_device *dev,
53 struct sta_info *sta);
54 static void handle_add_proc_queue(struct work_struct *work);
55
56 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
57 static void handle_wds_oper_queue(struct work_struct *work);
58 static void prism2_send_mgmt(struct net_device *dev,
59 u16 type_subtype, char *body,
60 int body_len, u8 *addr, u16 tx_cb_idx);
61 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
62
63
64 #ifndef PRISM2_NO_PROCFS_DEBUG
65 static int ap_debug_proc_read(char *page, char **start, off_t off,
66 int count, int *eof, void *data)
67 {
68 char *p = page;
69 struct ap_data *ap = (struct ap_data *) data;
70
71 if (off != 0) {
72 *eof = 1;
73 return 0;
74 }
75
76 p += sprintf(p, "BridgedUnicastFrames=%u\n", ap->bridged_unicast);
77 p += sprintf(p, "BridgedMulticastFrames=%u\n", ap->bridged_multicast);
78 p += sprintf(p, "max_inactivity=%u\n", ap->max_inactivity / HZ);
79 p += sprintf(p, "bridge_packets=%u\n", ap->bridge_packets);
80 p += sprintf(p, "nullfunc_ack=%u\n", ap->nullfunc_ack);
81 p += sprintf(p, "autom_ap_wds=%u\n", ap->autom_ap_wds);
82 p += sprintf(p, "auth_algs=%u\n", ap->local->auth_algs);
83 p += sprintf(p, "tx_drop_nonassoc=%u\n", ap->tx_drop_nonassoc);
84
85 return (p - page);
86 }
87 #endif /* PRISM2_NO_PROCFS_DEBUG */
88
89
90 static void ap_sta_hash_add(struct ap_data *ap, struct sta_info *sta)
91 {
92 sta->hnext = ap->sta_hash[STA_HASH(sta->addr)];
93 ap->sta_hash[STA_HASH(sta->addr)] = sta;
94 }
95
96 static void ap_sta_hash_del(struct ap_data *ap, struct sta_info *sta)
97 {
98 struct sta_info *s;
99
100 s = ap->sta_hash[STA_HASH(sta->addr)];
101 if (s == NULL) return;
102 if (memcmp(s->addr, sta->addr, ETH_ALEN) == 0) {
103 ap->sta_hash[STA_HASH(sta->addr)] = s->hnext;
104 return;
105 }
106
107 while (s->hnext != NULL && memcmp(s->hnext->addr, sta->addr, ETH_ALEN)
108 != 0)
109 s = s->hnext;
110 if (s->hnext != NULL)
111 s->hnext = s->hnext->hnext;
112 else
113 printk("AP: could not remove STA %pM from hash table\n",
114 sta->addr);
115 }
116
117 static void ap_free_sta(struct ap_data *ap, struct sta_info *sta)
118 {
119 if (sta->ap && sta->local)
120 hostap_event_expired_sta(sta->local->dev, sta);
121
122 if (ap->proc != NULL) {
123 char name[20];
124 sprintf(name, "%pM", sta->addr);
125 remove_proc_entry(name, ap->proc);
126 }
127
128 if (sta->crypt) {
129 sta->crypt->ops->deinit(sta->crypt->priv);
130 kfree(sta->crypt);
131 sta->crypt = NULL;
132 }
133
134 skb_queue_purge(&sta->tx_buf);
135
136 ap->num_sta--;
137 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
138 if (sta->aid > 0)
139 ap->sta_aid[sta->aid - 1] = NULL;
140
141 if (!sta->ap && sta->u.sta.challenge)
142 kfree(sta->u.sta.challenge);
143 del_timer(&sta->timer);
144 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
145
146 kfree(sta);
147 }
148
149
150 static void hostap_set_tim(local_info_t *local, int aid, int set)
151 {
152 if (local->func->set_tim)
153 local->func->set_tim(local->dev, aid, set);
154 }
155
156
157 static void hostap_event_new_sta(struct net_device *dev, struct sta_info *sta)
158 {
159 union iwreq_data wrqu;
160 memset(&wrqu, 0, sizeof(wrqu));
161 memcpy(wrqu.addr.sa_data, sta->addr, ETH_ALEN);
162 wrqu.addr.sa_family = ARPHRD_ETHER;
163 wireless_send_event(dev, IWEVREGISTERED, &wrqu, NULL);
164 }
165
166
167 static void hostap_event_expired_sta(struct net_device *dev,
168 struct sta_info *sta)
169 {
170 union iwreq_data wrqu;
171 memset(&wrqu, 0, sizeof(wrqu));
172 memcpy(wrqu.addr.sa_data, sta->addr, ETH_ALEN);
173 wrqu.addr.sa_family = ARPHRD_ETHER;
174 wireless_send_event(dev, IWEVEXPIRED, &wrqu, NULL);
175 }
176
177
178 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
179
180 static void ap_handle_timer(unsigned long data)
181 {
182 struct sta_info *sta = (struct sta_info *) data;
183 local_info_t *local;
184 struct ap_data *ap;
185 unsigned long next_time = 0;
186 int was_assoc;
187
188 if (sta == NULL || sta->local == NULL || sta->local->ap == NULL) {
189 PDEBUG(DEBUG_AP, "ap_handle_timer() called with NULL data\n");
190 return;
191 }
192
193 local = sta->local;
194 ap = local->ap;
195 was_assoc = sta->flags & WLAN_STA_ASSOC;
196
197 if (atomic_read(&sta->users) != 0)
198 next_time = jiffies + HZ;
199 else if ((sta->flags & WLAN_STA_PERM) && !(sta->flags & WLAN_STA_AUTH))
200 next_time = jiffies + ap->max_inactivity;
201
202 if (time_before(jiffies, sta->last_rx + ap->max_inactivity)) {
203 /* station activity detected; reset timeout state */
204 sta->timeout_next = STA_NULLFUNC;
205 next_time = sta->last_rx + ap->max_inactivity;
206 } else if (sta->timeout_next == STA_DISASSOC &&
207 !(sta->flags & WLAN_STA_PENDING_POLL)) {
208 /* STA ACKed data nullfunc frame poll */
209 sta->timeout_next = STA_NULLFUNC;
210 next_time = jiffies + ap->max_inactivity;
211 }
212
213 if (next_time) {
214 sta->timer.expires = next_time;
215 add_timer(&sta->timer);
216 return;
217 }
218
219 if (sta->ap)
220 sta->timeout_next = STA_DEAUTH;
221
222 if (sta->timeout_next == STA_DEAUTH && !(sta->flags & WLAN_STA_PERM)) {
223 spin_lock(&ap->sta_table_lock);
224 ap_sta_hash_del(ap, sta);
225 list_del(&sta->list);
226 spin_unlock(&ap->sta_table_lock);
227 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
228 } else if (sta->timeout_next == STA_DISASSOC)
229 sta->flags &= ~WLAN_STA_ASSOC;
230
231 if (was_assoc && !(sta->flags & WLAN_STA_ASSOC) && !sta->ap)
232 hostap_event_expired_sta(local->dev, sta);
233
234 if (sta->timeout_next == STA_DEAUTH && sta->aid > 0 &&
235 !skb_queue_empty(&sta->tx_buf)) {
236 hostap_set_tim(local, sta->aid, 0);
237 sta->flags &= ~WLAN_STA_TIM;
238 }
239
240 if (sta->ap) {
241 if (ap->autom_ap_wds) {
242 PDEBUG(DEBUG_AP, "%s: removing automatic WDS "
243 "connection to AP %pM\n",
244 local->dev->name, sta->addr);
245 hostap_wds_link_oper(local, sta->addr, WDS_DEL);
246 }
247 } else if (sta->timeout_next == STA_NULLFUNC) {
248 /* send data frame to poll STA and check whether this frame
249 * is ACKed */
250 /* FIX: IEEE80211_STYPE_NULLFUNC would be more appropriate, but
251 * it is apparently not retried so TX Exc events are not
252 * received for it */
253 sta->flags |= WLAN_STA_PENDING_POLL;
254 prism2_send_mgmt(local->dev, IEEE80211_FTYPE_DATA |
255 IEEE80211_STYPE_DATA, NULL, 0,
256 sta->addr, ap->tx_callback_poll);
257 } else {
258 int deauth = sta->timeout_next == STA_DEAUTH;
259 __le16 resp;
260 PDEBUG(DEBUG_AP, "%s: sending %s info to STA %pM"
261 "(last=%lu, jiffies=%lu)\n",
262 local->dev->name,
263 deauth ? "deauthentication" : "disassociation",
264 sta->addr, sta->last_rx, jiffies);
265
266 resp = cpu_to_le16(deauth ? WLAN_REASON_PREV_AUTH_NOT_VALID :
267 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
268 prism2_send_mgmt(local->dev, IEEE80211_FTYPE_MGMT |
269 (deauth ? IEEE80211_STYPE_DEAUTH :
270 IEEE80211_STYPE_DISASSOC),
271 (char *) &resp, 2, sta->addr, 0);
272 }
273
274 if (sta->timeout_next == STA_DEAUTH) {
275 if (sta->flags & WLAN_STA_PERM) {
276 PDEBUG(DEBUG_AP, "%s: STA %pM"
277 " would have been removed, "
278 "but it has 'perm' flag\n",
279 local->dev->name, sta->addr);
280 } else
281 ap_free_sta(ap, sta);
282 return;
283 }
284
285 if (sta->timeout_next == STA_NULLFUNC) {
286 sta->timeout_next = STA_DISASSOC;
287 sta->timer.expires = jiffies + AP_DISASSOC_DELAY;
288 } else {
289 sta->timeout_next = STA_DEAUTH;
290 sta->timer.expires = jiffies + AP_DEAUTH_DELAY;
291 }
292
293 add_timer(&sta->timer);
294 }
295
296
297 void hostap_deauth_all_stas(struct net_device *dev, struct ap_data *ap,
298 int resend)
299 {
300 u8 addr[ETH_ALEN];
301 __le16 resp;
302 int i;
303
304 PDEBUG(DEBUG_AP, "%s: Deauthenticate all stations\n", dev->name);
305 memset(addr, 0xff, ETH_ALEN);
306
307 resp = cpu_to_le16(WLAN_REASON_PREV_AUTH_NOT_VALID);
308
309 /* deauth message sent; try to resend it few times; the message is
310 * broadcast, so it may be delayed until next DTIM; there is not much
311 * else we can do at this point since the driver is going to be shut
312 * down */
313 for (i = 0; i < 5; i++) {
314 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT |
315 IEEE80211_STYPE_DEAUTH,
316 (char *) &resp, 2, addr, 0);
317
318 if (!resend || ap->num_sta <= 0)
319 return;
320
321 mdelay(50);
322 }
323 }
324
325
326 static int ap_control_proc_read(char *page, char **start, off_t off,
327 int count, int *eof, void *data)
328 {
329 char *p = page;
330 struct ap_data *ap = (struct ap_data *) data;
331 char *policy_txt;
332 struct mac_entry *entry;
333
334 if (off != 0) {
335 *eof = 1;
336 return 0;
337 }
338
339 switch (ap->mac_restrictions.policy) {
340 case MAC_POLICY_OPEN:
341 policy_txt = "open";
342 break;
343 case MAC_POLICY_ALLOW:
344 policy_txt = "allow";
345 break;
346 case MAC_POLICY_DENY:
347 policy_txt = "deny";
348 break;
349 default:
350 policy_txt = "unknown";
351 break;
352 }
353 p += sprintf(p, "MAC policy: %s\n", policy_txt);
354 p += sprintf(p, "MAC entries: %u\n", ap->mac_restrictions.entries);
355 p += sprintf(p, "MAC list:\n");
356 spin_lock_bh(&ap->mac_restrictions.lock);
357 list_for_each_entry(entry, &ap->mac_restrictions.mac_list, list) {
358 if (p - page > PAGE_SIZE - 80) {
359 p += sprintf(p, "All entries did not fit one page.\n");
360 break;
361 }
362
363 p += sprintf(p, "%pM\n", entry->addr);
364 }
365 spin_unlock_bh(&ap->mac_restrictions.lock);
366
367 return (p - page);
368 }
369
370
371 int ap_control_add_mac(struct mac_restrictions *mac_restrictions, u8 *mac)
372 {
373 struct mac_entry *entry;
374
375 entry = kmalloc(sizeof(struct mac_entry), GFP_KERNEL);
376 if (entry == NULL)
377 return -1;
378
379 memcpy(entry->addr, mac, ETH_ALEN);
380
381 spin_lock_bh(&mac_restrictions->lock);
382 list_add_tail(&entry->list, &mac_restrictions->mac_list);
383 mac_restrictions->entries++;
384 spin_unlock_bh(&mac_restrictions->lock);
385
386 return 0;
387 }
388
389
390 int ap_control_del_mac(struct mac_restrictions *mac_restrictions, u8 *mac)
391 {
392 struct list_head *ptr;
393 struct mac_entry *entry;
394
395 spin_lock_bh(&mac_restrictions->lock);
396 for (ptr = mac_restrictions->mac_list.next;
397 ptr != &mac_restrictions->mac_list; ptr = ptr->next) {
398 entry = list_entry(ptr, struct mac_entry, list);
399
400 if (memcmp(entry->addr, mac, ETH_ALEN) == 0) {
401 list_del(ptr);
402 kfree(entry);
403 mac_restrictions->entries--;
404 spin_unlock_bh(&mac_restrictions->lock);
405 return 0;
406 }
407 }
408 spin_unlock_bh(&mac_restrictions->lock);
409 return -1;
410 }
411
412
413 static int ap_control_mac_deny(struct mac_restrictions *mac_restrictions,
414 u8 *mac)
415 {
416 struct mac_entry *entry;
417 int found = 0;
418
419 if (mac_restrictions->policy == MAC_POLICY_OPEN)
420 return 0;
421
422 spin_lock_bh(&mac_restrictions->lock);
423 list_for_each_entry(entry, &mac_restrictions->mac_list, list) {
424 if (memcmp(entry->addr, mac, ETH_ALEN) == 0) {
425 found = 1;
426 break;
427 }
428 }
429 spin_unlock_bh(&mac_restrictions->lock);
430
431 if (mac_restrictions->policy == MAC_POLICY_ALLOW)
432 return !found;
433 else
434 return found;
435 }
436
437
438 void ap_control_flush_macs(struct mac_restrictions *mac_restrictions)
439 {
440 struct list_head *ptr, *n;
441 struct mac_entry *entry;
442
443 if (mac_restrictions->entries == 0)
444 return;
445
446 spin_lock_bh(&mac_restrictions->lock);
447 for (ptr = mac_restrictions->mac_list.next, n = ptr->next;
448 ptr != &mac_restrictions->mac_list;
449 ptr = n, n = ptr->next) {
450 entry = list_entry(ptr, struct mac_entry, list);
451 list_del(ptr);
452 kfree(entry);
453 }
454 mac_restrictions->entries = 0;
455 spin_unlock_bh(&mac_restrictions->lock);
456 }
457
458
459 int ap_control_kick_mac(struct ap_data *ap, struct net_device *dev, u8 *mac)
460 {
461 struct sta_info *sta;
462 __le16 resp;
463
464 spin_lock_bh(&ap->sta_table_lock);
465 sta = ap_get_sta(ap, mac);
466 if (sta) {
467 ap_sta_hash_del(ap, sta);
468 list_del(&sta->list);
469 }
470 spin_unlock_bh(&ap->sta_table_lock);
471
472 if (!sta)
473 return -EINVAL;
474
475 resp = cpu_to_le16(WLAN_REASON_PREV_AUTH_NOT_VALID);
476 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_DEAUTH,
477 (char *) &resp, 2, sta->addr, 0);
478
479 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap)
480 hostap_event_expired_sta(dev, sta);
481
482 ap_free_sta(ap, sta);
483
484 return 0;
485 }
486
487 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
488
489
490 void ap_control_kickall(struct ap_data *ap)
491 {
492 struct list_head *ptr, *n;
493 struct sta_info *sta;
494
495 spin_lock_bh(&ap->sta_table_lock);
496 for (ptr = ap->sta_list.next, n = ptr->next; ptr != &ap->sta_list;
497 ptr = n, n = ptr->next) {
498 sta = list_entry(ptr, struct sta_info, list);
499 ap_sta_hash_del(ap, sta);
500 list_del(&sta->list);
501 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
502 hostap_event_expired_sta(sta->local->dev, sta);
503 ap_free_sta(ap, sta);
504 }
505 spin_unlock_bh(&ap->sta_table_lock);
506 }
507
508
509 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
510
511 #define PROC_LIMIT (PAGE_SIZE - 80)
512
513 static int prism2_ap_proc_read(char *page, char **start, off_t off,
514 int count, int *eof, void *data)
515 {
516 char *p = page;
517 struct ap_data *ap = (struct ap_data *) data;
518 struct sta_info *sta;
519 int i;
520
521 if (off > PROC_LIMIT) {
522 *eof = 1;
523 return 0;
524 }
525
526 p += sprintf(p, "# BSSID CHAN SIGNAL NOISE RATE SSID FLAGS\n");
527 spin_lock_bh(&ap->sta_table_lock);
528 list_for_each_entry(sta, &ap->sta_list, list) {
529 if (!sta->ap)
530 continue;
531
532 p += sprintf(p, "%pM %d %d %d %d '",
533 sta->addr,
534 sta->u.ap.channel, sta->last_rx_signal,
535 sta->last_rx_silence, sta->last_rx_rate);
536 for (i = 0; i < sta->u.ap.ssid_len; i++)
537 p += sprintf(p, ((sta->u.ap.ssid[i] >= 32 &&
538 sta->u.ap.ssid[i] < 127) ?
539 "%c" : "<%02x>"),
540 sta->u.ap.ssid[i]);
541 p += sprintf(p, "'");
542 if (sta->capability & WLAN_CAPABILITY_ESS)
543 p += sprintf(p, " [ESS]");
544 if (sta->capability & WLAN_CAPABILITY_IBSS)
545 p += sprintf(p, " [IBSS]");
546 if (sta->capability & WLAN_CAPABILITY_PRIVACY)
547 p += sprintf(p, " [WEP]");
548 p += sprintf(p, "\n");
549
550 if ((p - page) > PROC_LIMIT) {
551 printk(KERN_DEBUG "hostap: ap proc did not fit\n");
552 break;
553 }
554 }
555 spin_unlock_bh(&ap->sta_table_lock);
556
557 if ((p - page) <= off) {
558 *eof = 1;
559 return 0;
560 }
561
562 *start = page + off;
563
564 return (p - page - off);
565 }
566 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
567
568
569 void hostap_check_sta_fw_version(struct ap_data *ap, int sta_fw_ver)
570 {
571 if (!ap)
572 return;
573
574 if (sta_fw_ver == PRISM2_FW_VER(0,8,0)) {
575 PDEBUG(DEBUG_AP, "Using data::nullfunc ACK workaround - "
576 "firmware upgrade recommended\n");
577 ap->nullfunc_ack = 1;
578 } else
579 ap->nullfunc_ack = 0;
580
581 if (sta_fw_ver == PRISM2_FW_VER(1,4,2)) {
582 printk(KERN_WARNING "%s: Warning: secondary station firmware "
583 "version 1.4.2 does not seem to work in Host AP mode\n",
584 ap->local->dev->name);
585 }
586 }
587
588
589 /* Called only as a tasklet (software IRQ) */
590 static void hostap_ap_tx_cb(struct sk_buff *skb, int ok, void *data)
591 {
592 struct ap_data *ap = data;
593 struct ieee80211_hdr *hdr;
594
595 if (!ap->local->hostapd || !ap->local->apdev) {
596 dev_kfree_skb(skb);
597 return;
598 }
599
600 /* Pass the TX callback frame to the hostapd; use 802.11 header version
601 * 1 to indicate failure (no ACK) and 2 success (frame ACKed) */
602
603 hdr = (struct ieee80211_hdr *) skb->data;
604 hdr->frame_control &= cpu_to_le16(~IEEE80211_FCTL_VERS);
605 hdr->frame_control |= cpu_to_le16(ok ? BIT(1) : BIT(0));
606
607 skb->dev = ap->local->apdev;
608 skb_pull(skb, hostap_80211_get_hdrlen(hdr->frame_control));
609 skb->pkt_type = PACKET_OTHERHOST;
610 skb->protocol = cpu_to_be16(ETH_P_802_2);
611 memset(skb->cb, 0, sizeof(skb->cb));
612 netif_rx(skb);
613 }
614
615
616 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
617 /* Called only as a tasklet (software IRQ) */
618 static void hostap_ap_tx_cb_auth(struct sk_buff *skb, int ok, void *data)
619 {
620 struct ap_data *ap = data;
621 struct net_device *dev = ap->local->dev;
622 struct ieee80211_hdr *hdr;
623 u16 auth_alg, auth_transaction, status;
624 __le16 *pos;
625 struct sta_info *sta = NULL;
626 char *txt = NULL;
627
628 if (ap->local->hostapd) {
629 dev_kfree_skb(skb);
630 return;
631 }
632
633 hdr = (struct ieee80211_hdr *) skb->data;
634 if (!ieee80211_is_auth(hdr->frame_control) ||
635 skb->len < IEEE80211_MGMT_HDR_LEN + 6) {
636 printk(KERN_DEBUG "%s: hostap_ap_tx_cb_auth received invalid "
637 "frame\n", dev->name);
638 dev_kfree_skb(skb);
639 return;
640 }
641
642 pos = (__le16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
643 auth_alg = le16_to_cpu(*pos++);
644 auth_transaction = le16_to_cpu(*pos++);
645 status = le16_to_cpu(*pos++);
646
647 if (!ok) {
648 txt = "frame was not ACKed";
649 goto done;
650 }
651
652 spin_lock(&ap->sta_table_lock);
653 sta = ap_get_sta(ap, hdr->addr1);
654 if (sta)
655 atomic_inc(&sta->users);
656 spin_unlock(&ap->sta_table_lock);
657
658 if (!sta) {
659 txt = "STA not found";
660 goto done;
661 }
662
663 if (status == WLAN_STATUS_SUCCESS &&
664 ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 2) ||
665 (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 4))) {
666 txt = "STA authenticated";
667 sta->flags |= WLAN_STA_AUTH;
668 sta->last_auth = jiffies;
669 } else if (status != WLAN_STATUS_SUCCESS)
670 txt = "authentication failed";
671
672 done:
673 if (sta)
674 atomic_dec(&sta->users);
675 if (txt) {
676 PDEBUG(DEBUG_AP, "%s: %pM auth_cb - alg=%d "
677 "trans#=%d status=%d - %s\n",
678 dev->name, hdr->addr1,
679 auth_alg, auth_transaction, status, txt);
680 }
681 dev_kfree_skb(skb);
682 }
683
684
685 /* Called only as a tasklet (software IRQ) */
686 static void hostap_ap_tx_cb_assoc(struct sk_buff *skb, int ok, void *data)
687 {
688 struct ap_data *ap = data;
689 struct net_device *dev = ap->local->dev;
690 struct ieee80211_hdr *hdr;
691 u16 status;
692 __le16 *pos;
693 struct sta_info *sta = NULL;
694 char *txt = NULL;
695
696 if (ap->local->hostapd) {
697 dev_kfree_skb(skb);
698 return;
699 }
700
701 hdr = (struct ieee80211_hdr *) skb->data;
702 if ((!ieee80211_is_assoc_resp(hdr->frame_control) &&
703 !ieee80211_is_reassoc_resp(hdr->frame_control)) ||
704 skb->len < IEEE80211_MGMT_HDR_LEN + 4) {
705 printk(KERN_DEBUG "%s: hostap_ap_tx_cb_assoc received invalid "
706 "frame\n", dev->name);
707 dev_kfree_skb(skb);
708 return;
709 }
710
711 if (!ok) {
712 txt = "frame was not ACKed";
713 goto done;
714 }
715
716 spin_lock(&ap->sta_table_lock);
717 sta = ap_get_sta(ap, hdr->addr1);
718 if (sta)
719 atomic_inc(&sta->users);
720 spin_unlock(&ap->sta_table_lock);
721
722 if (!sta) {
723 txt = "STA not found";
724 goto done;
725 }
726
727 pos = (__le16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
728 pos++;
729 status = le16_to_cpu(*pos++);
730 if (status == WLAN_STATUS_SUCCESS) {
731 if (!(sta->flags & WLAN_STA_ASSOC))
732 hostap_event_new_sta(dev, sta);
733 txt = "STA associated";
734 sta->flags |= WLAN_STA_ASSOC;
735 sta->last_assoc = jiffies;
736 } else
737 txt = "association failed";
738
739 done:
740 if (sta)
741 atomic_dec(&sta->users);
742 if (txt) {
743 PDEBUG(DEBUG_AP, "%s: %pM assoc_cb - %s\n",
744 dev->name, hdr->addr1, txt);
745 }
746 dev_kfree_skb(skb);
747 }
748
749 /* Called only as a tasklet (software IRQ); TX callback for poll frames used
750 * in verifying whether the STA is still present. */
751 static void hostap_ap_tx_cb_poll(struct sk_buff *skb, int ok, void *data)
752 {
753 struct ap_data *ap = data;
754 struct ieee80211_hdr *hdr;
755 struct sta_info *sta;
756
757 if (skb->len < 24)
758 goto fail;
759 hdr = (struct ieee80211_hdr *) skb->data;
760 if (ok) {
761 spin_lock(&ap->sta_table_lock);
762 sta = ap_get_sta(ap, hdr->addr1);
763 if (sta)
764 sta->flags &= ~WLAN_STA_PENDING_POLL;
765 spin_unlock(&ap->sta_table_lock);
766 } else {
767 PDEBUG(DEBUG_AP,
768 "%s: STA %pM did not ACK activity poll frame\n",
769 ap->local->dev->name, hdr->addr1);
770 }
771
772 fail:
773 dev_kfree_skb(skb);
774 }
775 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
776
777
778 void hostap_init_data(local_info_t *local)
779 {
780 struct ap_data *ap = local->ap;
781
782 if (ap == NULL) {
783 printk(KERN_WARNING "hostap_init_data: ap == NULL\n");
784 return;
785 }
786 memset(ap, 0, sizeof(struct ap_data));
787 ap->local = local;
788
789 ap->ap_policy = GET_INT_PARM(other_ap_policy, local->card_idx);
790 ap->bridge_packets = GET_INT_PARM(ap_bridge_packets, local->card_idx);
791 ap->max_inactivity =
792 GET_INT_PARM(ap_max_inactivity, local->card_idx) * HZ;
793 ap->autom_ap_wds = GET_INT_PARM(autom_ap_wds, local->card_idx);
794
795 spin_lock_init(&ap->sta_table_lock);
796 INIT_LIST_HEAD(&ap->sta_list);
797
798 /* Initialize task queue structure for AP management */
799 INIT_WORK(&local->ap->add_sta_proc_queue, handle_add_proc_queue);
800
801 ap->tx_callback_idx =
802 hostap_tx_callback_register(local, hostap_ap_tx_cb, ap);
803 if (ap->tx_callback_idx == 0)
804 printk(KERN_WARNING "%s: failed to register TX callback for "
805 "AP\n", local->dev->name);
806 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
807 INIT_WORK(&local->ap->wds_oper_queue, handle_wds_oper_queue);
808
809 ap->tx_callback_auth =
810 hostap_tx_callback_register(local, hostap_ap_tx_cb_auth, ap);
811 ap->tx_callback_assoc =
812 hostap_tx_callback_register(local, hostap_ap_tx_cb_assoc, ap);
813 ap->tx_callback_poll =
814 hostap_tx_callback_register(local, hostap_ap_tx_cb_poll, ap);
815 if (ap->tx_callback_auth == 0 || ap->tx_callback_assoc == 0 ||
816 ap->tx_callback_poll == 0)
817 printk(KERN_WARNING "%s: failed to register TX callback for "
818 "AP\n", local->dev->name);
819
820 spin_lock_init(&ap->mac_restrictions.lock);
821 INIT_LIST_HEAD(&ap->mac_restrictions.mac_list);
822 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
823
824 ap->initialized = 1;
825 }
826
827
828 void hostap_init_ap_proc(local_info_t *local)
829 {
830 struct ap_data *ap = local->ap;
831
832 ap->proc = local->proc;
833 if (ap->proc == NULL)
834 return;
835
836 #ifndef PRISM2_NO_PROCFS_DEBUG
837 create_proc_read_entry("ap_debug", 0, ap->proc,
838 ap_debug_proc_read, ap);
839 #endif /* PRISM2_NO_PROCFS_DEBUG */
840
841 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
842 create_proc_read_entry("ap_control", 0, ap->proc,
843 ap_control_proc_read, ap);
844 create_proc_read_entry("ap", 0, ap->proc,
845 prism2_ap_proc_read, ap);
846 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
847
848 }
849
850
851 void hostap_free_data(struct ap_data *ap)
852 {
853 struct sta_info *n, *sta;
854
855 if (ap == NULL || !ap->initialized) {
856 printk(KERN_DEBUG "hostap_free_data: ap has not yet been "
857 "initialized - skip resource freeing\n");
858 return;
859 }
860
861 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
862 if (ap->crypt)
863 ap->crypt->deinit(ap->crypt_priv);
864 ap->crypt = ap->crypt_priv = NULL;
865 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
866
867 list_for_each_entry_safe(sta, n, &ap->sta_list, list) {
868 ap_sta_hash_del(ap, sta);
869 list_del(&sta->list);
870 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
871 hostap_event_expired_sta(sta->local->dev, sta);
872 ap_free_sta(ap, sta);
873 }
874
875 #ifndef PRISM2_NO_PROCFS_DEBUG
876 if (ap->proc != NULL) {
877 remove_proc_entry("ap_debug", ap->proc);
878 }
879 #endif /* PRISM2_NO_PROCFS_DEBUG */
880
881 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
882 if (ap->proc != NULL) {
883 remove_proc_entry("ap", ap->proc);
884 remove_proc_entry("ap_control", ap->proc);
885 }
886 ap_control_flush_macs(&ap->mac_restrictions);
887 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
888
889 ap->initialized = 0;
890 }
891
892
893 /* caller should have mutex for AP STA list handling */
894 static struct sta_info* ap_get_sta(struct ap_data *ap, u8 *sta)
895 {
896 struct sta_info *s;
897
898 s = ap->sta_hash[STA_HASH(sta)];
899 while (s != NULL && memcmp(s->addr, sta, ETH_ALEN) != 0)
900 s = s->hnext;
901 return s;
902 }
903
904
905 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
906
907 /* Called from timer handler and from scheduled AP queue handlers */
908 static void prism2_send_mgmt(struct net_device *dev,
909 u16 type_subtype, char *body,
910 int body_len, u8 *addr, u16 tx_cb_idx)
911 {
912 struct hostap_interface *iface;
913 local_info_t *local;
914 struct ieee80211_hdr *hdr;
915 u16 fc;
916 struct sk_buff *skb;
917 struct hostap_skb_tx_data *meta;
918 int hdrlen;
919
920 iface = netdev_priv(dev);
921 local = iface->local;
922 dev = local->dev; /* always use master radio device */
923 iface = netdev_priv(dev);
924
925 if (!(dev->flags & IFF_UP)) {
926 PDEBUG(DEBUG_AP, "%s: prism2_send_mgmt - device is not UP - "
927 "cannot send frame\n", dev->name);
928 return;
929 }
930
931 skb = dev_alloc_skb(sizeof(*hdr) + body_len);
932 if (skb == NULL) {
933 PDEBUG(DEBUG_AP, "%s: prism2_send_mgmt failed to allocate "
934 "skb\n", dev->name);
935 return;
936 }
937
938 fc = type_subtype;
939 hdrlen = hostap_80211_get_hdrlen(cpu_to_le16(type_subtype));
940 hdr = (struct ieee80211_hdr *) skb_put(skb, hdrlen);
941 if (body)
942 memcpy(skb_put(skb, body_len), body, body_len);
943
944 memset(hdr, 0, hdrlen);
945
946 /* FIX: ctrl::ack sending used special HFA384X_TX_CTRL_802_11
947 * tx_control instead of using local->tx_control */
948
949
950 memcpy(hdr->addr1, addr, ETH_ALEN); /* DA / RA */
951 if (ieee80211_is_data(hdr->frame_control)) {
952 fc |= IEEE80211_FCTL_FROMDS;
953 memcpy(hdr->addr2, dev->dev_addr, ETH_ALEN); /* BSSID */
954 memcpy(hdr->addr3, dev->dev_addr, ETH_ALEN); /* SA */
955 } else if (ieee80211_is_ctl(hdr->frame_control)) {
956 /* control:ACK does not have addr2 or addr3 */
957 memset(hdr->addr2, 0, ETH_ALEN);
958 memset(hdr->addr3, 0, ETH_ALEN);
959 } else {
960 memcpy(hdr->addr2, dev->dev_addr, ETH_ALEN); /* SA */
961 memcpy(hdr->addr3, dev->dev_addr, ETH_ALEN); /* BSSID */
962 }
963
964 hdr->frame_control = cpu_to_le16(fc);
965
966 meta = (struct hostap_skb_tx_data *) skb->cb;
967 memset(meta, 0, sizeof(*meta));
968 meta->magic = HOSTAP_SKB_TX_DATA_MAGIC;
969 meta->iface = iface;
970 meta->tx_cb_idx = tx_cb_idx;
971
972 skb->dev = dev;
973 skb_reset_mac_header(skb);
974 skb_reset_network_header(skb);
975 dev_queue_xmit(skb);
976 }
977 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
978
979
980 static int prism2_sta_proc_read(char *page, char **start, off_t off,
981 int count, int *eof, void *data)
982 {
983 char *p = page;
984 struct sta_info *sta = (struct sta_info *) data;
985 int i;
986
987 /* FIX: possible race condition.. the STA data could have just expired,
988 * but proc entry was still here so that the read could have started;
989 * some locking should be done here.. */
990
991 if (off != 0) {
992 *eof = 1;
993 return 0;
994 }
995
996 p += sprintf(p, "%s=%pM\nusers=%d\naid=%d\n"
997 "flags=0x%04x%s%s%s%s%s%s%s\n"
998 "capability=0x%02x\nlisten_interval=%d\nsupported_rates=",
999 sta->ap ? "AP" : "STA",
1000 sta->addr, atomic_read(&sta->users), sta->aid,
1001 sta->flags,
1002 sta->flags & WLAN_STA_AUTH ? " AUTH" : "",
1003 sta->flags & WLAN_STA_ASSOC ? " ASSOC" : "",
1004 sta->flags & WLAN_STA_PS ? " PS" : "",
1005 sta->flags & WLAN_STA_TIM ? " TIM" : "",
1006 sta->flags & WLAN_STA_PERM ? " PERM" : "",
1007 sta->flags & WLAN_STA_AUTHORIZED ? " AUTHORIZED" : "",
1008 sta->flags & WLAN_STA_PENDING_POLL ? " POLL" : "",
1009 sta->capability, sta->listen_interval);
1010 /* supported_rates: 500 kbit/s units with msb ignored */
1011 for (i = 0; i < sizeof(sta->supported_rates); i++)
1012 if (sta->supported_rates[i] != 0)
1013 p += sprintf(p, "%d%sMbps ",
1014 (sta->supported_rates[i] & 0x7f) / 2,
1015 sta->supported_rates[i] & 1 ? ".5" : "");
1016 p += sprintf(p, "\njiffies=%lu\nlast_auth=%lu\nlast_assoc=%lu\n"
1017 "last_rx=%lu\nlast_tx=%lu\nrx_packets=%lu\n"
1018 "tx_packets=%lu\n"
1019 "rx_bytes=%lu\ntx_bytes=%lu\nbuffer_count=%d\n"
1020 "last_rx: silence=%d dBm signal=%d dBm rate=%d%s Mbps\n"
1021 "tx_rate=%d\ntx[1M]=%d\ntx[2M]=%d\ntx[5.5M]=%d\n"
1022 "tx[11M]=%d\n"
1023 "rx[1M]=%d\nrx[2M]=%d\nrx[5.5M]=%d\nrx[11M]=%d\n",
1024 jiffies, sta->last_auth, sta->last_assoc, sta->last_rx,
1025 sta->last_tx,
1026 sta->rx_packets, sta->tx_packets, sta->rx_bytes,
1027 sta->tx_bytes, skb_queue_len(&sta->tx_buf),
1028 sta->last_rx_silence,
1029 sta->last_rx_signal, sta->last_rx_rate / 10,
1030 sta->last_rx_rate % 10 ? ".5" : "",
1031 sta->tx_rate, sta->tx_count[0], sta->tx_count[1],
1032 sta->tx_count[2], sta->tx_count[3], sta->rx_count[0],
1033 sta->rx_count[1], sta->rx_count[2], sta->rx_count[3]);
1034 if (sta->crypt && sta->crypt->ops && sta->crypt->ops->print_stats)
1035 p = sta->crypt->ops->print_stats(p, sta->crypt->priv);
1036 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1037 if (sta->ap) {
1038 if (sta->u.ap.channel >= 0)
1039 p += sprintf(p, "channel=%d\n", sta->u.ap.channel);
1040 p += sprintf(p, "ssid=");
1041 for (i = 0; i < sta->u.ap.ssid_len; i++)
1042 p += sprintf(p, ((sta->u.ap.ssid[i] >= 32 &&
1043 sta->u.ap.ssid[i] < 127) ?
1044 "%c" : "<%02x>"),
1045 sta->u.ap.ssid[i]);
1046 p += sprintf(p, "\n");
1047 }
1048 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1049
1050 return (p - page);
1051 }
1052
1053
1054 static void handle_add_proc_queue(struct work_struct *work)
1055 {
1056 struct ap_data *ap = container_of(work, struct ap_data,
1057 add_sta_proc_queue);
1058 struct sta_info *sta;
1059 char name[20];
1060 struct add_sta_proc_data *entry, *prev;
1061
1062 entry = ap->add_sta_proc_entries;
1063 ap->add_sta_proc_entries = NULL;
1064
1065 while (entry) {
1066 spin_lock_bh(&ap->sta_table_lock);
1067 sta = ap_get_sta(ap, entry->addr);
1068 if (sta)
1069 atomic_inc(&sta->users);
1070 spin_unlock_bh(&ap->sta_table_lock);
1071
1072 if (sta) {
1073 sprintf(name, "%pM", sta->addr);
1074 sta->proc = create_proc_read_entry(
1075 name, 0, ap->proc,
1076 prism2_sta_proc_read, sta);
1077
1078 atomic_dec(&sta->users);
1079 }
1080
1081 prev = entry;
1082 entry = entry->next;
1083 kfree(prev);
1084 }
1085 }
1086
1087
1088 static struct sta_info * ap_add_sta(struct ap_data *ap, u8 *addr)
1089 {
1090 struct sta_info *sta;
1091
1092 sta = kzalloc(sizeof(struct sta_info), GFP_ATOMIC);
1093 if (sta == NULL) {
1094 PDEBUG(DEBUG_AP, "AP: kmalloc failed\n");
1095 return NULL;
1096 }
1097
1098 /* initialize STA info data */
1099 sta->local = ap->local;
1100 skb_queue_head_init(&sta->tx_buf);
1101 memcpy(sta->addr, addr, ETH_ALEN);
1102
1103 atomic_inc(&sta->users);
1104 spin_lock_bh(&ap->sta_table_lock);
1105 list_add(&sta->list, &ap->sta_list);
1106 ap->num_sta++;
1107 ap_sta_hash_add(ap, sta);
1108 spin_unlock_bh(&ap->sta_table_lock);
1109
1110 if (ap->proc) {
1111 struct add_sta_proc_data *entry;
1112 /* schedule a non-interrupt context process to add a procfs
1113 * entry for the STA since procfs code use GFP_KERNEL */
1114 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
1115 if (entry) {
1116 memcpy(entry->addr, sta->addr, ETH_ALEN);
1117 entry->next = ap->add_sta_proc_entries;
1118 ap->add_sta_proc_entries = entry;
1119 schedule_work(&ap->add_sta_proc_queue);
1120 } else
1121 printk(KERN_DEBUG "Failed to add STA proc data\n");
1122 }
1123
1124 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1125 init_timer(&sta->timer);
1126 sta->timer.expires = jiffies + ap->max_inactivity;
1127 sta->timer.data = (unsigned long) sta;
1128 sta->timer.function = ap_handle_timer;
1129 if (!ap->local->hostapd)
1130 add_timer(&sta->timer);
1131 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1132
1133 return sta;
1134 }
1135
1136
1137 static int ap_tx_rate_ok(int rateidx, struct sta_info *sta,
1138 local_info_t *local)
1139 {
1140 if (rateidx > sta->tx_max_rate ||
1141 !(sta->tx_supp_rates & (1 << rateidx)))
1142 return 0;
1143
1144 if (local->tx_rate_control != 0 &&
1145 !(local->tx_rate_control & (1 << rateidx)))
1146 return 0;
1147
1148 return 1;
1149 }
1150
1151
1152 static void prism2_check_tx_rates(struct sta_info *sta)
1153 {
1154 int i;
1155
1156 sta->tx_supp_rates = 0;
1157 for (i = 0; i < sizeof(sta->supported_rates); i++) {
1158 if ((sta->supported_rates[i] & 0x7f) == 2)
1159 sta->tx_supp_rates |= WLAN_RATE_1M;
1160 if ((sta->supported_rates[i] & 0x7f) == 4)
1161 sta->tx_supp_rates |= WLAN_RATE_2M;
1162 if ((sta->supported_rates[i] & 0x7f) == 11)
1163 sta->tx_supp_rates |= WLAN_RATE_5M5;
1164 if ((sta->supported_rates[i] & 0x7f) == 22)
1165 sta->tx_supp_rates |= WLAN_RATE_11M;
1166 }
1167 sta->tx_max_rate = sta->tx_rate = sta->tx_rate_idx = 0;
1168 if (sta->tx_supp_rates & WLAN_RATE_1M) {
1169 sta->tx_max_rate = 0;
1170 if (ap_tx_rate_ok(0, sta, sta->local)) {
1171 sta->tx_rate = 10;
1172 sta->tx_rate_idx = 0;
1173 }
1174 }
1175 if (sta->tx_supp_rates & WLAN_RATE_2M) {
1176 sta->tx_max_rate = 1;
1177 if (ap_tx_rate_ok(1, sta, sta->local)) {
1178 sta->tx_rate = 20;
1179 sta->tx_rate_idx = 1;
1180 }
1181 }
1182 if (sta->tx_supp_rates & WLAN_RATE_5M5) {
1183 sta->tx_max_rate = 2;
1184 if (ap_tx_rate_ok(2, sta, sta->local)) {
1185 sta->tx_rate = 55;
1186 sta->tx_rate_idx = 2;
1187 }
1188 }
1189 if (sta->tx_supp_rates & WLAN_RATE_11M) {
1190 sta->tx_max_rate = 3;
1191 if (ap_tx_rate_ok(3, sta, sta->local)) {
1192 sta->tx_rate = 110;
1193 sta->tx_rate_idx = 3;
1194 }
1195 }
1196 }
1197
1198
1199 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1200
1201 static void ap_crypt_init(struct ap_data *ap)
1202 {
1203 ap->crypt = lib80211_get_crypto_ops("WEP");
1204
1205 if (ap->crypt) {
1206 if (ap->crypt->init) {
1207 ap->crypt_priv = ap->crypt->init(0);
1208 if (ap->crypt_priv == NULL)
1209 ap->crypt = NULL;
1210 else {
1211 u8 key[WEP_KEY_LEN];
1212 get_random_bytes(key, WEP_KEY_LEN);
1213 ap->crypt->set_key(key, WEP_KEY_LEN, NULL,
1214 ap->crypt_priv);
1215 }
1216 }
1217 }
1218
1219 if (ap->crypt == NULL) {
1220 printk(KERN_WARNING "AP could not initialize WEP: load module "
1221 "lib80211_crypt_wep.ko\n");
1222 }
1223 }
1224
1225
1226 /* Generate challenge data for shared key authentication. IEEE 802.11 specifies
1227 * that WEP algorithm is used for generating challenge. This should be unique,
1228 * but otherwise there is not really need for randomness etc. Initialize WEP
1229 * with pseudo random key and then use increasing IV to get unique challenge
1230 * streams.
1231 *
1232 * Called only as a scheduled task for pending AP frames.
1233 */
1234 static char * ap_auth_make_challenge(struct ap_data *ap)
1235 {
1236 char *tmpbuf;
1237 struct sk_buff *skb;
1238
1239 if (ap->crypt == NULL) {
1240 ap_crypt_init(ap);
1241 if (ap->crypt == NULL)
1242 return NULL;
1243 }
1244
1245 tmpbuf = kmalloc(WLAN_AUTH_CHALLENGE_LEN, GFP_ATOMIC);
1246 if (tmpbuf == NULL) {
1247 PDEBUG(DEBUG_AP, "AP: kmalloc failed for challenge\n");
1248 return NULL;
1249 }
1250
1251 skb = dev_alloc_skb(WLAN_AUTH_CHALLENGE_LEN +
1252 ap->crypt->extra_mpdu_prefix_len +
1253 ap->crypt->extra_mpdu_postfix_len);
1254 if (skb == NULL) {
1255 kfree(tmpbuf);
1256 return NULL;
1257 }
1258
1259 skb_reserve(skb, ap->crypt->extra_mpdu_prefix_len);
1260 memset(skb_put(skb, WLAN_AUTH_CHALLENGE_LEN), 0,
1261 WLAN_AUTH_CHALLENGE_LEN);
1262 if (ap->crypt->encrypt_mpdu(skb, 0, ap->crypt_priv)) {
1263 dev_kfree_skb(skb);
1264 kfree(tmpbuf);
1265 return NULL;
1266 }
1267
1268 skb_copy_from_linear_data_offset(skb, ap->crypt->extra_mpdu_prefix_len,
1269 tmpbuf, WLAN_AUTH_CHALLENGE_LEN);
1270 dev_kfree_skb(skb);
1271
1272 return tmpbuf;
1273 }
1274
1275
1276 /* Called only as a scheduled task for pending AP frames. */
1277 static void handle_authen(local_info_t *local, struct sk_buff *skb,
1278 struct hostap_80211_rx_status *rx_stats)
1279 {
1280 struct net_device *dev = local->dev;
1281 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1282 size_t hdrlen;
1283 struct ap_data *ap = local->ap;
1284 char body[8 + WLAN_AUTH_CHALLENGE_LEN], *challenge = NULL;
1285 int len, olen;
1286 u16 auth_alg, auth_transaction, status_code;
1287 __le16 *pos;
1288 u16 resp = WLAN_STATUS_SUCCESS;
1289 struct sta_info *sta = NULL;
1290 struct lib80211_crypt_data *crypt;
1291 char *txt = "";
1292
1293 len = skb->len - IEEE80211_MGMT_HDR_LEN;
1294
1295 hdrlen = hostap_80211_get_hdrlen(hdr->frame_control);
1296
1297 if (len < 6) {
1298 PDEBUG(DEBUG_AP, "%s: handle_authen - too short payload "
1299 "(len=%d) from %pM\n", dev->name, len, hdr->addr2);
1300 return;
1301 }
1302
1303 spin_lock_bh(&local->ap->sta_table_lock);
1304 sta = ap_get_sta(local->ap, hdr->addr2);
1305 if (sta)
1306 atomic_inc(&sta->users);
1307 spin_unlock_bh(&local->ap->sta_table_lock);
1308
1309 if (sta && sta->crypt)
1310 crypt = sta->crypt;
1311 else {
1312 int idx = 0;
1313 if (skb->len >= hdrlen + 3)
1314 idx = skb->data[hdrlen + 3] >> 6;
1315 crypt = local->crypt_info.crypt[idx];
1316 }
1317
1318 pos = (__le16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
1319 auth_alg = __le16_to_cpu(*pos);
1320 pos++;
1321 auth_transaction = __le16_to_cpu(*pos);
1322 pos++;
1323 status_code = __le16_to_cpu(*pos);
1324 pos++;
1325
1326 if (memcmp(dev->dev_addr, hdr->addr2, ETH_ALEN) == 0 ||
1327 ap_control_mac_deny(&ap->mac_restrictions, hdr->addr2)) {
1328 txt = "authentication denied";
1329 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1330 goto fail;
1331 }
1332
1333 if (((local->auth_algs & PRISM2_AUTH_OPEN) &&
1334 auth_alg == WLAN_AUTH_OPEN) ||
1335 ((local->auth_algs & PRISM2_AUTH_SHARED_KEY) &&
1336 crypt && auth_alg == WLAN_AUTH_SHARED_KEY)) {
1337 } else {
1338 txt = "unsupported algorithm";
1339 resp = WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG;
1340 goto fail;
1341 }
1342
1343 if (len >= 8) {
1344 u8 *u = (u8 *) pos;
1345 if (*u == WLAN_EID_CHALLENGE) {
1346 if (*(u + 1) != WLAN_AUTH_CHALLENGE_LEN) {
1347 txt = "invalid challenge len";
1348 resp = WLAN_STATUS_CHALLENGE_FAIL;
1349 goto fail;
1350 }
1351 if (len - 8 < WLAN_AUTH_CHALLENGE_LEN) {
1352 txt = "challenge underflow";
1353 resp = WLAN_STATUS_CHALLENGE_FAIL;
1354 goto fail;
1355 }
1356 challenge = (char *) (u + 2);
1357 }
1358 }
1359
1360 if (sta && sta->ap) {
1361 if (time_after(jiffies, sta->u.ap.last_beacon +
1362 (10 * sta->listen_interval * HZ) / 1024)) {
1363 PDEBUG(DEBUG_AP, "%s: no beacons received for a while,"
1364 " assuming AP %pM is now STA\n",
1365 dev->name, sta->addr);
1366 sta->ap = 0;
1367 sta->flags = 0;
1368 sta->u.sta.challenge = NULL;
1369 } else {
1370 txt = "AP trying to authenticate?";
1371 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1372 goto fail;
1373 }
1374 }
1375
1376 if ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 1) ||
1377 (auth_alg == WLAN_AUTH_SHARED_KEY &&
1378 (auth_transaction == 1 ||
1379 (auth_transaction == 3 && sta != NULL &&
1380 sta->u.sta.challenge != NULL)))) {
1381 } else {
1382 txt = "unknown authentication transaction number";
1383 resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION;
1384 goto fail;
1385 }
1386
1387 if (sta == NULL) {
1388 txt = "new STA";
1389
1390 if (local->ap->num_sta >= MAX_STA_COUNT) {
1391 /* FIX: might try to remove some old STAs first? */
1392 txt = "no more room for new STAs";
1393 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1394 goto fail;
1395 }
1396
1397 sta = ap_add_sta(local->ap, hdr->addr2);
1398 if (sta == NULL) {
1399 txt = "ap_add_sta failed";
1400 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1401 goto fail;
1402 }
1403 }
1404
1405 switch (auth_alg) {
1406 case WLAN_AUTH_OPEN:
1407 txt = "authOK";
1408 /* IEEE 802.11 standard is not completely clear about
1409 * whether STA is considered authenticated after
1410 * authentication OK frame has been send or after it
1411 * has been ACKed. In order to reduce interoperability
1412 * issues, mark the STA authenticated before ACK. */
1413 sta->flags |= WLAN_STA_AUTH;
1414 break;
1415
1416 case WLAN_AUTH_SHARED_KEY:
1417 if (auth_transaction == 1) {
1418 if (sta->u.sta.challenge == NULL) {
1419 sta->u.sta.challenge =
1420 ap_auth_make_challenge(local->ap);
1421 if (sta->u.sta.challenge == NULL) {
1422 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1423 goto fail;
1424 }
1425 }
1426 } else {
1427 if (sta->u.sta.challenge == NULL ||
1428 challenge == NULL ||
1429 memcmp(sta->u.sta.challenge, challenge,
1430 WLAN_AUTH_CHALLENGE_LEN) != 0 ||
1431 !ieee80211_has_protected(hdr->frame_control)) {
1432 txt = "challenge response incorrect";
1433 resp = WLAN_STATUS_CHALLENGE_FAIL;
1434 goto fail;
1435 }
1436
1437 txt = "challenge OK - authOK";
1438 /* IEEE 802.11 standard is not completely clear about
1439 * whether STA is considered authenticated after
1440 * authentication OK frame has been send or after it
1441 * has been ACKed. In order to reduce interoperability
1442 * issues, mark the STA authenticated before ACK. */
1443 sta->flags |= WLAN_STA_AUTH;
1444 kfree(sta->u.sta.challenge);
1445 sta->u.sta.challenge = NULL;
1446 }
1447 break;
1448 }
1449
1450 fail:
1451 pos = (__le16 *) body;
1452 *pos = cpu_to_le16(auth_alg);
1453 pos++;
1454 *pos = cpu_to_le16(auth_transaction + 1);
1455 pos++;
1456 *pos = cpu_to_le16(resp); /* status_code */
1457 pos++;
1458 olen = 6;
1459
1460 if (resp == WLAN_STATUS_SUCCESS && sta != NULL &&
1461 sta->u.sta.challenge != NULL &&
1462 auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 1) {
1463 u8 *tmp = (u8 *) pos;
1464 *tmp++ = WLAN_EID_CHALLENGE;
1465 *tmp++ = WLAN_AUTH_CHALLENGE_LEN;
1466 pos++;
1467 memcpy(pos, sta->u.sta.challenge, WLAN_AUTH_CHALLENGE_LEN);
1468 olen += 2 + WLAN_AUTH_CHALLENGE_LEN;
1469 }
1470
1471 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_AUTH,
1472 body, olen, hdr->addr2, ap->tx_callback_auth);
1473
1474 if (sta) {
1475 sta->last_rx = jiffies;
1476 atomic_dec(&sta->users);
1477 }
1478
1479 if (resp) {
1480 PDEBUG(DEBUG_AP, "%s: %pM auth (alg=%d "
1481 "trans#=%d stat=%d len=%d fc=%04x) ==> %d (%s)\n",
1482 dev->name, hdr->addr2,
1483 auth_alg, auth_transaction, status_code, len,
1484 le16_to_cpu(hdr->frame_control), resp, txt);
1485 }
1486 }
1487
1488
1489 /* Called only as a scheduled task for pending AP frames. */
1490 static void handle_assoc(local_info_t *local, struct sk_buff *skb,
1491 struct hostap_80211_rx_status *rx_stats, int reassoc)
1492 {
1493 struct net_device *dev = local->dev;
1494 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1495 char body[12], *p, *lpos;
1496 int len, left;
1497 __le16 *pos;
1498 u16 resp = WLAN_STATUS_SUCCESS;
1499 struct sta_info *sta = NULL;
1500 int send_deauth = 0;
1501 char *txt = "";
1502 u8 prev_ap[ETH_ALEN];
1503
1504 left = len = skb->len - IEEE80211_MGMT_HDR_LEN;
1505
1506 if (len < (reassoc ? 10 : 4)) {
1507 PDEBUG(DEBUG_AP, "%s: handle_assoc - too short payload "
1508 "(len=%d, reassoc=%d) from %pM\n",
1509 dev->name, len, reassoc, hdr->addr2);
1510 return;
1511 }
1512
1513 spin_lock_bh(&local->ap->sta_table_lock);
1514 sta = ap_get_sta(local->ap, hdr->addr2);
1515 if (sta == NULL || (sta->flags & WLAN_STA_AUTH) == 0) {
1516 spin_unlock_bh(&local->ap->sta_table_lock);
1517 txt = "trying to associate before authentication";
1518 send_deauth = 1;
1519 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1520 sta = NULL; /* do not decrement sta->users */
1521 goto fail;
1522 }
1523 atomic_inc(&sta->users);
1524 spin_unlock_bh(&local->ap->sta_table_lock);
1525
1526 pos = (__le16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
1527 sta->capability = __le16_to_cpu(*pos);
1528 pos++; left -= 2;
1529 sta->listen_interval = __le16_to_cpu(*pos);
1530 pos++; left -= 2;
1531
1532 if (reassoc) {
1533 memcpy(prev_ap, pos, ETH_ALEN);
1534 pos++; pos++; pos++; left -= 6;
1535 } else
1536 memset(prev_ap, 0, ETH_ALEN);
1537
1538 if (left >= 2) {
1539 unsigned int ileft;
1540 unsigned char *u = (unsigned char *) pos;
1541
1542 if (*u == WLAN_EID_SSID) {
1543 u++; left--;
1544 ileft = *u;
1545 u++; left--;
1546
1547 if (ileft > left || ileft > MAX_SSID_LEN) {
1548 txt = "SSID overflow";
1549 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1550 goto fail;
1551 }
1552
1553 if (ileft != strlen(local->essid) ||
1554 memcmp(local->essid, u, ileft) != 0) {
1555 txt = "not our SSID";
1556 resp = WLAN_STATUS_ASSOC_DENIED_UNSPEC;
1557 goto fail;
1558 }
1559
1560 u += ileft;
1561 left -= ileft;
1562 }
1563
1564 if (left >= 2 && *u == WLAN_EID_SUPP_RATES) {
1565 u++; left--;
1566 ileft = *u;
1567 u++; left--;
1568
1569 if (ileft > left || ileft == 0 ||
1570 ileft > WLAN_SUPP_RATES_MAX) {
1571 txt = "SUPP_RATES len error";
1572 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1573 goto fail;
1574 }
1575
1576 memset(sta->supported_rates, 0,
1577 sizeof(sta->supported_rates));
1578 memcpy(sta->supported_rates, u, ileft);
1579 prism2_check_tx_rates(sta);
1580
1581 u += ileft;
1582 left -= ileft;
1583 }
1584
1585 if (left > 0) {
1586 PDEBUG(DEBUG_AP, "%s: assoc from %pM"
1587 " with extra data (%d bytes) [",
1588 dev->name, hdr->addr2, left);
1589 while (left > 0) {
1590 PDEBUG2(DEBUG_AP, "<%02x>", *u);
1591 u++; left--;
1592 }
1593 PDEBUG2(DEBUG_AP, "]\n");
1594 }
1595 } else {
1596 txt = "frame underflow";
1597 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1598 goto fail;
1599 }
1600
1601 /* get a unique AID */
1602 if (sta->aid > 0)
1603 txt = "OK, old AID";
1604 else {
1605 spin_lock_bh(&local->ap->sta_table_lock);
1606 for (sta->aid = 1; sta->aid <= MAX_AID_TABLE_SIZE; sta->aid++)
1607 if (local->ap->sta_aid[sta->aid - 1] == NULL)
1608 break;
1609 if (sta->aid > MAX_AID_TABLE_SIZE) {
1610 sta->aid = 0;
1611 spin_unlock_bh(&local->ap->sta_table_lock);
1612 resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
1613 txt = "no room for more AIDs";
1614 } else {
1615 local->ap->sta_aid[sta->aid - 1] = sta;
1616 spin_unlock_bh(&local->ap->sta_table_lock);
1617 txt = "OK, new AID";
1618 }
1619 }
1620
1621 fail:
1622 pos = (__le16 *) body;
1623
1624 if (send_deauth) {
1625 *pos = cpu_to_le16(WLAN_REASON_STA_REQ_ASSOC_WITHOUT_AUTH);
1626 pos++;
1627 } else {
1628 /* FIX: CF-Pollable and CF-PollReq should be set to match the
1629 * values in beacons/probe responses */
1630 /* FIX: how about privacy and WEP? */
1631 /* capability */
1632 *pos = cpu_to_le16(WLAN_CAPABILITY_ESS);
1633 pos++;
1634
1635 /* status_code */
1636 *pos = cpu_to_le16(resp);
1637 pos++;
1638
1639 *pos = cpu_to_le16((sta && sta->aid > 0 ? sta->aid : 0) |
1640 BIT(14) | BIT(15)); /* AID */
1641 pos++;
1642
1643 /* Supported rates (Information element) */
1644 p = (char *) pos;
1645 *p++ = WLAN_EID_SUPP_RATES;
1646 lpos = p;
1647 *p++ = 0; /* len */
1648 if (local->tx_rate_control & WLAN_RATE_1M) {
1649 *p++ = local->basic_rates & WLAN_RATE_1M ? 0x82 : 0x02;
1650 (*lpos)++;
1651 }
1652 if (local->tx_rate_control & WLAN_RATE_2M) {
1653 *p++ = local->basic_rates & WLAN_RATE_2M ? 0x84 : 0x04;
1654 (*lpos)++;
1655 }
1656 if (local->tx_rate_control & WLAN_RATE_5M5) {
1657 *p++ = local->basic_rates & WLAN_RATE_5M5 ?
1658 0x8b : 0x0b;
1659 (*lpos)++;
1660 }
1661 if (local->tx_rate_control & WLAN_RATE_11M) {
1662 *p++ = local->basic_rates & WLAN_RATE_11M ?
1663 0x96 : 0x16;
1664 (*lpos)++;
1665 }
1666 pos = (__le16 *) p;
1667 }
1668
1669 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT |
1670 (send_deauth ? IEEE80211_STYPE_DEAUTH :
1671 (reassoc ? IEEE80211_STYPE_REASSOC_RESP :
1672 IEEE80211_STYPE_ASSOC_RESP)),
1673 body, (u8 *) pos - (u8 *) body,
1674 hdr->addr2,
1675 send_deauth ? 0 : local->ap->tx_callback_assoc);
1676
1677 if (sta) {
1678 if (resp == WLAN_STATUS_SUCCESS) {
1679 sta->last_rx = jiffies;
1680 /* STA will be marked associated from TX callback, if
1681 * AssocResp is ACKed */
1682 }
1683 atomic_dec(&sta->users);
1684 }
1685
1686 }
1687
1688
1689 /* Called only as a scheduled task for pending AP frames. */
1690 static void handle_deauth(local_info_t *local, struct sk_buff *skb,
1691 struct hostap_80211_rx_status *rx_stats)
1692 {
1693 struct net_device *dev = local->dev;
1694 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1695 char *body = (char *) (skb->data + IEEE80211_MGMT_HDR_LEN);
1696 int len;
1697 u16 reason_code;
1698 __le16 *pos;
1699 struct sta_info *sta = NULL;
1700
1701 len = skb->len - IEEE80211_MGMT_HDR_LEN;
1702
1703 if (len < 2) {
1704 printk("handle_deauth - too short payload (len=%d)\n", len);
1705 return;
1706 }
1707
1708 pos = (__le16 *) body;
1709 reason_code = le16_to_cpu(*pos);
1710
1711 PDEBUG(DEBUG_AP, "%s: deauthentication: %pM len=%d, "
1712 "reason_code=%d\n", dev->name, hdr->addr2,
1713 len, reason_code);
1714
1715 spin_lock_bh(&local->ap->sta_table_lock);
1716 sta = ap_get_sta(local->ap, hdr->addr2);
1717 if (sta != NULL) {
1718 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap)
1719 hostap_event_expired_sta(local->dev, sta);
1720 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
1721 }
1722 spin_unlock_bh(&local->ap->sta_table_lock);
1723 if (sta == NULL) {
1724 printk("%s: deauthentication from %pM, "
1725 "reason_code=%d, but STA not authenticated\n", dev->name,
1726 hdr->addr2, reason_code);
1727 }
1728 }
1729
1730
1731 /* Called only as a scheduled task for pending AP frames. */
1732 static void handle_disassoc(local_info_t *local, struct sk_buff *skb,
1733 struct hostap_80211_rx_status *rx_stats)
1734 {
1735 struct net_device *dev = local->dev;
1736 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1737 char *body = skb->data + IEEE80211_MGMT_HDR_LEN;
1738 int len;
1739 u16 reason_code;
1740 __le16 *pos;
1741 struct sta_info *sta = NULL;
1742
1743 len = skb->len - IEEE80211_MGMT_HDR_LEN;
1744
1745 if (len < 2) {
1746 printk("handle_disassoc - too short payload (len=%d)\n", len);
1747 return;
1748 }
1749
1750 pos = (__le16 *) body;
1751 reason_code = le16_to_cpu(*pos);
1752
1753 PDEBUG(DEBUG_AP, "%s: disassociation: %pM len=%d, "
1754 "reason_code=%d\n", dev->name, hdr->addr2,
1755 len, reason_code);
1756
1757 spin_lock_bh(&local->ap->sta_table_lock);
1758 sta = ap_get_sta(local->ap, hdr->addr2);
1759 if (sta != NULL) {
1760 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap)
1761 hostap_event_expired_sta(local->dev, sta);
1762 sta->flags &= ~WLAN_STA_ASSOC;
1763 }
1764 spin_unlock_bh(&local->ap->sta_table_lock);
1765 if (sta == NULL) {
1766 printk("%s: disassociation from %pM, "
1767 "reason_code=%d, but STA not authenticated\n",
1768 dev->name, hdr->addr2, reason_code);
1769 }
1770 }
1771
1772
1773 /* Called only as a scheduled task for pending AP frames. */
1774 static void ap_handle_data_nullfunc(local_info_t *local,
1775 struct ieee80211_hdr *hdr)
1776 {
1777 struct net_device *dev = local->dev;
1778
1779 /* some STA f/w's seem to require control::ACK frame for
1780 * data::nullfunc, but at least Prism2 station f/w version 0.8.0 does
1781 * not send this..
1782 * send control::ACK for the data::nullfunc */
1783
1784 printk(KERN_DEBUG "Sending control::ACK for data::nullfunc\n");
1785 prism2_send_mgmt(dev, IEEE80211_FTYPE_CTL | IEEE80211_STYPE_ACK,
1786 NULL, 0, hdr->addr2, 0);
1787 }
1788
1789
1790 /* Called only as a scheduled task for pending AP frames. */
1791 static void ap_handle_dropped_data(local_info_t *local,
1792 struct ieee80211_hdr *hdr)
1793 {
1794 struct net_device *dev = local->dev;
1795 struct sta_info *sta;
1796 __le16 reason;
1797
1798 spin_lock_bh(&local->ap->sta_table_lock);
1799 sta = ap_get_sta(local->ap, hdr->addr2);
1800 if (sta)
1801 atomic_inc(&sta->users);
1802 spin_unlock_bh(&local->ap->sta_table_lock);
1803
1804 if (sta != NULL && (sta->flags & WLAN_STA_ASSOC)) {
1805 PDEBUG(DEBUG_AP, "ap_handle_dropped_data: STA is now okay?\n");
1806 atomic_dec(&sta->users);
1807 return;
1808 }
1809
1810 reason = cpu_to_le16(WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
1811 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT |
1812 ((sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) ?
1813 IEEE80211_STYPE_DEAUTH : IEEE80211_STYPE_DISASSOC),
1814 (char *) &reason, sizeof(reason), hdr->addr2, 0);
1815
1816 if (sta)
1817 atomic_dec(&sta->users);
1818 }
1819
1820 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1821
1822
1823 /* Called only as a scheduled task for pending AP frames. */
1824 static void pspoll_send_buffered(local_info_t *local, struct sta_info *sta,
1825 struct sk_buff *skb)
1826 {
1827 struct hostap_skb_tx_data *meta;
1828
1829 if (!(sta->flags & WLAN_STA_PS)) {
1830 /* Station has moved to non-PS mode, so send all buffered
1831 * frames using normal device queue. */
1832 dev_queue_xmit(skb);
1833 return;
1834 }
1835
1836 /* add a flag for hostap_handle_sta_tx() to know that this skb should
1837 * be passed through even though STA is using PS */
1838 meta = (struct hostap_skb_tx_data *) skb->cb;
1839 meta->flags |= HOSTAP_TX_FLAGS_BUFFERED_FRAME;
1840 if (!skb_queue_empty(&sta->tx_buf)) {
1841 /* indicate to STA that more frames follow */
1842 meta->flags |= HOSTAP_TX_FLAGS_ADD_MOREDATA;
1843 }
1844 dev_queue_xmit(skb);
1845 }
1846
1847
1848 /* Called only as a scheduled task for pending AP frames. */
1849 static void handle_pspoll(local_info_t *local,
1850 struct ieee80211_hdr *hdr,
1851 struct hostap_80211_rx_status *rx_stats)
1852 {
1853 struct net_device *dev = local->dev;
1854 struct sta_info *sta;
1855 u16 aid;
1856 struct sk_buff *skb;
1857
1858 PDEBUG(DEBUG_PS2, "handle_pspoll: BSSID=%pM, TA=%pM PWRMGT=%d\n",
1859 hdr->addr1, hdr->addr2, !!ieee80211_has_pm(hdr->frame_control));
1860
1861 if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN)) {
1862 PDEBUG(DEBUG_AP,
1863 "handle_pspoll - addr1(BSSID)=%pM not own MAC\n",
1864 hdr->addr1);
1865 return;
1866 }
1867
1868 aid = le16_to_cpu(hdr->duration_id);
1869 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) {
1870 PDEBUG(DEBUG_PS, " PSPOLL and AID[15:14] not set\n");
1871 return;
1872 }
1873 aid &= ~(BIT(15) | BIT(14));
1874 if (aid == 0 || aid > MAX_AID_TABLE_SIZE) {
1875 PDEBUG(DEBUG_PS, " invalid aid=%d\n", aid);
1876 return;
1877 }
1878 PDEBUG(DEBUG_PS2, " aid=%d\n", aid);
1879
1880 spin_lock_bh(&local->ap->sta_table_lock);
1881 sta = ap_get_sta(local->ap, hdr->addr2);
1882 if (sta)
1883 atomic_inc(&sta->users);
1884 spin_unlock_bh(&local->ap->sta_table_lock);
1885
1886 if (sta == NULL) {
1887 PDEBUG(DEBUG_PS, " STA not found\n");
1888 return;
1889 }
1890 if (sta->aid != aid) {
1891 PDEBUG(DEBUG_PS, " received aid=%i does not match with "
1892 "assoc.aid=%d\n", aid, sta->aid);
1893 return;
1894 }
1895
1896 /* FIX: todo:
1897 * - add timeout for buffering (clear aid in TIM vector if buffer timed
1898 * out (expiry time must be longer than ListenInterval for
1899 * the corresponding STA; "8802-11: 11.2.1.9 AP aging function"
1900 * - what to do, if buffered, pspolled, and sent frame is not ACKed by
1901 * sta; store buffer for later use and leave TIM aid bit set? use
1902 * TX event to check whether frame was ACKed?
1903 */
1904
1905 while ((skb = skb_dequeue(&sta->tx_buf)) != NULL) {
1906 /* send buffered frame .. */
1907 PDEBUG(DEBUG_PS2, "Sending buffered frame to STA after PS POLL"
1908 " (buffer_count=%d)\n", skb_queue_len(&sta->tx_buf));
1909
1910 pspoll_send_buffered(local, sta, skb);
1911
1912 if (sta->flags & WLAN_STA_PS) {
1913 /* send only one buffered packet per PS Poll */
1914 /* FIX: should ignore further PS Polls until the
1915 * buffered packet that was just sent is acknowledged
1916 * (Tx or TxExc event) */
1917 break;
1918 }
1919 }
1920
1921 if (skb_queue_empty(&sta->tx_buf)) {
1922 /* try to clear aid from TIM */
1923 if (!(sta->flags & WLAN_STA_TIM))
1924 PDEBUG(DEBUG_PS2, "Re-unsetting TIM for aid %d\n",
1925 aid);
1926 hostap_set_tim(local, aid, 0);
1927 sta->flags &= ~WLAN_STA_TIM;
1928 }
1929
1930 atomic_dec(&sta->users);
1931 }
1932
1933
1934 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1935
1936 static void handle_wds_oper_queue(struct work_struct *work)
1937 {
1938 struct ap_data *ap = container_of(work, struct ap_data,
1939 wds_oper_queue);
1940 local_info_t *local = ap->local;
1941 struct wds_oper_data *entry, *prev;
1942
1943 spin_lock_bh(&local->lock);
1944 entry = local->ap->wds_oper_entries;
1945 local->ap->wds_oper_entries = NULL;
1946 spin_unlock_bh(&local->lock);
1947
1948 while (entry) {
1949 PDEBUG(DEBUG_AP, "%s: %s automatic WDS connection "
1950 "to AP %pM\n",
1951 local->dev->name,
1952 entry->type == WDS_ADD ? "adding" : "removing",
1953 entry->addr);
1954 if (entry->type == WDS_ADD)
1955 prism2_wds_add(local, entry->addr, 0);
1956 else if (entry->type == WDS_DEL)
1957 prism2_wds_del(local, entry->addr, 0, 1);
1958
1959 prev = entry;
1960 entry = entry->next;
1961 kfree(prev);
1962 }
1963 }
1964
1965
1966 /* Called only as a scheduled task for pending AP frames. */
1967 static void handle_beacon(local_info_t *local, struct sk_buff *skb,
1968 struct hostap_80211_rx_status *rx_stats)
1969 {
1970 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1971 char *body = skb->data + IEEE80211_MGMT_HDR_LEN;
1972 int len, left;
1973 u16 beacon_int, capability;
1974 __le16 *pos;
1975 char *ssid = NULL;
1976 unsigned char *supp_rates = NULL;
1977 int ssid_len = 0, supp_rates_len = 0;
1978 struct sta_info *sta = NULL;
1979 int new_sta = 0, channel = -1;
1980
1981 len = skb->len - IEEE80211_MGMT_HDR_LEN;
1982
1983 if (len < 8 + 2 + 2) {
1984 printk(KERN_DEBUG "handle_beacon - too short payload "
1985 "(len=%d)\n", len);
1986 return;
1987 }
1988
1989 pos = (__le16 *) body;
1990 left = len;
1991
1992 /* Timestamp (8 octets) */
1993 pos += 4; left -= 8;
1994 /* Beacon interval (2 octets) */
1995 beacon_int = le16_to_cpu(*pos);
1996 pos++; left -= 2;
1997 /* Capability information (2 octets) */
1998 capability = le16_to_cpu(*pos);
1999 pos++; left -= 2;
2000
2001 if (local->ap->ap_policy != AP_OTHER_AP_EVEN_IBSS &&
2002 capability & WLAN_CAPABILITY_IBSS)
2003 return;
2004
2005 if (left >= 2) {
2006 unsigned int ileft;
2007 unsigned char *u = (unsigned char *) pos;
2008
2009 if (*u == WLAN_EID_SSID) {
2010 u++; left--;
2011 ileft = *u;
2012 u++; left--;
2013
2014 if (ileft > left || ileft > MAX_SSID_LEN) {
2015 PDEBUG(DEBUG_AP, "SSID: overflow\n");
2016 return;
2017 }
2018
2019 if (local->ap->ap_policy == AP_OTHER_AP_SAME_SSID &&
2020 (ileft != strlen(local->essid) ||
2021 memcmp(local->essid, u, ileft) != 0)) {
2022 /* not our SSID */
2023 return;
2024 }
2025
2026 ssid = u;
2027 ssid_len = ileft;
2028
2029 u += ileft;
2030 left -= ileft;
2031 }
2032
2033 if (*u == WLAN_EID_SUPP_RATES) {
2034 u++; left--;
2035 ileft = *u;
2036 u++; left--;
2037
2038 if (ileft > left || ileft == 0 || ileft > 8) {
2039 PDEBUG(DEBUG_AP, " - SUPP_RATES len error\n");
2040 return;
2041 }
2042
2043 supp_rates = u;
2044 supp_rates_len = ileft;
2045
2046 u += ileft;
2047 left -= ileft;
2048 }
2049
2050 if (*u == WLAN_EID_DS_PARAMS) {
2051 u++; left--;
2052 ileft = *u;
2053 u++; left--;
2054
2055 if (ileft > left || ileft != 1) {
2056 PDEBUG(DEBUG_AP, " - DS_PARAMS len error\n");
2057 return;
2058 }
2059
2060 channel = *u;
2061
2062 u += ileft;
2063 left -= ileft;
2064 }
2065 }
2066
2067 spin_lock_bh(&local->ap->sta_table_lock);
2068 sta = ap_get_sta(local->ap, hdr->addr2);
2069 if (sta != NULL)
2070 atomic_inc(&sta->users);
2071 spin_unlock_bh(&local->ap->sta_table_lock);
2072
2073 if (sta == NULL) {
2074 /* add new AP */
2075 new_sta = 1;
2076 sta = ap_add_sta(local->ap, hdr->addr2);
2077 if (sta == NULL) {
2078 printk(KERN_INFO "prism2: kmalloc failed for AP "
2079 "data structure\n");
2080 return;
2081 }
2082 hostap_event_new_sta(local->dev, sta);
2083
2084 /* mark APs authentication and associated for pseudo ad-hoc
2085 * style communication */
2086 sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
2087
2088 if (local->ap->autom_ap_wds) {
2089 hostap_wds_link_oper(local, sta->addr, WDS_ADD);
2090 }
2091 }
2092
2093 sta->ap = 1;
2094 if (ssid) {
2095 sta->u.ap.ssid_len = ssid_len;
2096 memcpy(sta->u.ap.ssid, ssid, ssid_len);
2097 sta->u.ap.ssid[ssid_len] = '\0';
2098 } else {
2099 sta->u.ap.ssid_len = 0;
2100 sta->u.ap.ssid[0] = '\0';
2101 }
2102 sta->u.ap.channel = channel;
2103 sta->rx_packets++;
2104 sta->rx_bytes += len;
2105 sta->u.ap.last_beacon = sta->last_rx = jiffies;
2106 sta->capability = capability;
2107 sta->listen_interval = beacon_int;
2108
2109 atomic_dec(&sta->users);
2110
2111 if (new_sta) {
2112 memset(sta->supported_rates, 0, sizeof(sta->supported_rates));
2113 memcpy(sta->supported_rates, supp_rates, supp_rates_len);
2114 prism2_check_tx_rates(sta);
2115 }
2116 }
2117
2118 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2119
2120
2121 /* Called only as a tasklet. */
2122 static void handle_ap_item(local_info_t *local, struct sk_buff *skb,
2123 struct hostap_80211_rx_status *rx_stats)
2124 {
2125 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2126 struct net_device *dev = local->dev;
2127 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2128 u16 fc, type, stype;
2129 struct ieee80211_hdr *hdr;
2130
2131 /* FIX: should give skb->len to handler functions and check that the
2132 * buffer is long enough */
2133 hdr = (struct ieee80211_hdr *) skb->data;
2134 fc = le16_to_cpu(hdr->frame_control);
2135 type = fc & IEEE80211_FCTL_FTYPE;
2136 stype = fc & IEEE80211_FCTL_STYPE;
2137
2138 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2139 if (!local->hostapd && type == IEEE80211_FTYPE_DATA) {
2140 PDEBUG(DEBUG_AP, "handle_ap_item - data frame\n");
2141
2142 if (!(fc & IEEE80211_FCTL_TODS) ||
2143 (fc & IEEE80211_FCTL_FROMDS)) {
2144 if (stype == IEEE80211_STYPE_NULLFUNC) {
2145 /* no ToDS nullfunc seems to be used to check
2146 * AP association; so send reject message to
2147 * speed up re-association */
2148 ap_handle_dropped_data(local, hdr);
2149 goto done;
2150 }
2151 PDEBUG(DEBUG_AP, " not ToDS frame (fc=0x%04x)\n",
2152 fc);
2153 goto done;
2154 }
2155
2156 if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN)) {
2157 PDEBUG(DEBUG_AP, "handle_ap_item - addr1(BSSID)=%pM"
2158 " not own MAC\n", hdr->addr1);
2159 goto done;
2160 }
2161
2162 if (local->ap->nullfunc_ack &&
2163 stype == IEEE80211_STYPE_NULLFUNC)
2164 ap_handle_data_nullfunc(local, hdr);
2165 else
2166 ap_handle_dropped_data(local, hdr);
2167 goto done;
2168 }
2169
2170 if (type == IEEE80211_FTYPE_MGMT && stype == IEEE80211_STYPE_BEACON) {
2171 handle_beacon(local, skb, rx_stats);
2172 goto done;
2173 }
2174 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2175
2176 if (type == IEEE80211_FTYPE_CTL && stype == IEEE80211_STYPE_PSPOLL) {
2177 handle_pspoll(local, hdr, rx_stats);
2178 goto done;
2179 }
2180
2181 if (local->hostapd) {
2182 PDEBUG(DEBUG_AP, "Unknown frame in AP queue: type=0x%02x "
2183 "subtype=0x%02x\n", type, stype);
2184 goto done;
2185 }
2186
2187 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2188 if (type != IEEE80211_FTYPE_MGMT) {
2189 PDEBUG(DEBUG_AP, "handle_ap_item - not a management frame?\n");
2190 goto done;
2191 }
2192
2193 if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN)) {
2194 PDEBUG(DEBUG_AP, "handle_ap_item - addr1(DA)=%pM"
2195 " not own MAC\n", hdr->addr1);
2196 goto done;
2197 }
2198
2199 if (memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN)) {
2200 PDEBUG(DEBUG_AP, "handle_ap_item - addr3(BSSID)=%pM"
2201 " not own MAC\n", hdr->addr3);
2202 goto done;
2203 }
2204
2205 switch (stype) {
2206 case IEEE80211_STYPE_ASSOC_REQ:
2207 handle_assoc(local, skb, rx_stats, 0);
2208 break;
2209 case IEEE80211_STYPE_ASSOC_RESP:
2210 PDEBUG(DEBUG_AP, "==> ASSOC RESP (ignored)\n");
2211 break;
2212 case IEEE80211_STYPE_REASSOC_REQ:
2213 handle_assoc(local, skb, rx_stats, 1);
2214 break;
2215 case IEEE80211_STYPE_REASSOC_RESP:
2216 PDEBUG(DEBUG_AP, "==> REASSOC RESP (ignored)\n");
2217 break;
2218 case IEEE80211_STYPE_ATIM:
2219 PDEBUG(DEBUG_AP, "==> ATIM (ignored)\n");
2220 break;
2221 case IEEE80211_STYPE_DISASSOC:
2222 handle_disassoc(local, skb, rx_stats);
2223 break;
2224 case IEEE80211_STYPE_AUTH:
2225 handle_authen(local, skb, rx_stats);
2226 break;
2227 case IEEE80211_STYPE_DEAUTH:
2228 handle_deauth(local, skb, rx_stats);
2229 break;
2230 default:
2231 PDEBUG(DEBUG_AP, "Unknown mgmt frame subtype 0x%02x\n",
2232 stype >> 4);
2233 break;
2234 }
2235 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2236
2237 done:
2238 dev_kfree_skb(skb);
2239 }
2240
2241
2242 /* Called only as a tasklet (software IRQ) */
2243 void hostap_rx(struct net_device *dev, struct sk_buff *skb,
2244 struct hostap_80211_rx_status *rx_stats)
2245 {
2246 struct hostap_interface *iface;
2247 local_info_t *local;
2248 struct ieee80211_hdr *hdr;
2249
2250 iface = netdev_priv(dev);
2251 local = iface->local;
2252
2253 if (skb->len < 16)
2254 goto drop;
2255
2256 dev->stats.rx_packets++;
2257
2258 hdr = (struct ieee80211_hdr *) skb->data;
2259
2260 if (local->ap->ap_policy == AP_OTHER_AP_SKIP_ALL &&
2261 ieee80211_is_beacon(hdr->frame_control))
2262 goto drop;
2263
2264 skb->protocol = cpu_to_be16(ETH_P_HOSTAP);
2265 handle_ap_item(local, skb, rx_stats);
2266 return;
2267
2268 drop:
2269 dev_kfree_skb(skb);
2270 }
2271
2272
2273 /* Called only as a tasklet (software IRQ) */
2274 static void schedule_packet_send(local_info_t *local, struct sta_info *sta)
2275 {
2276 struct sk_buff *skb;
2277 struct ieee80211_hdr *hdr;
2278 struct hostap_80211_rx_status rx_stats;
2279
2280 if (skb_queue_empty(&sta->tx_buf))
2281 return;
2282
2283 skb = dev_alloc_skb(16);
2284 if (skb == NULL) {
2285 printk(KERN_DEBUG "%s: schedule_packet_send: skb alloc "
2286 "failed\n", local->dev->name);
2287 return;
2288 }
2289
2290 hdr = (struct ieee80211_hdr *) skb_put(skb, 16);
2291
2292 /* Generate a fake pspoll frame to start packet delivery */
2293 hdr->frame_control = cpu_to_le16(
2294 IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL);
2295 memcpy(hdr->addr1, local->dev->dev_addr, ETH_ALEN);
2296 memcpy(hdr->addr2, sta->addr, ETH_ALEN);
2297 hdr->duration_id = cpu_to_le16(sta->aid | BIT(15) | BIT(14));
2298
2299 PDEBUG(DEBUG_PS2,
2300 "%s: Scheduling buffered packet delivery for STA %pM\n",
2301 local->dev->name, sta->addr);
2302
2303 skb->dev = local->dev;
2304
2305 memset(&rx_stats, 0, sizeof(rx_stats));
2306 hostap_rx(local->dev, skb, &rx_stats);
2307 }
2308
2309
2310 int prism2_ap_get_sta_qual(local_info_t *local, struct sockaddr addr[],
2311 struct iw_quality qual[], int buf_size,
2312 int aplist)
2313 {
2314 struct ap_data *ap = local->ap;
2315 struct list_head *ptr;
2316 int count = 0;
2317
2318 spin_lock_bh(&ap->sta_table_lock);
2319
2320 for (ptr = ap->sta_list.next; ptr != NULL && ptr != &ap->sta_list;
2321 ptr = ptr->next) {
2322 struct sta_info *sta = (struct sta_info *) ptr;
2323
2324 if (aplist && !sta->ap)
2325 continue;
2326 addr[count].sa_family = ARPHRD_ETHER;
2327 memcpy(addr[count].sa_data, sta->addr, ETH_ALEN);
2328 if (sta->last_rx_silence == 0)
2329 qual[count].qual = sta->last_rx_signal < 27 ?
2330 0 : (sta->last_rx_signal - 27) * 92 / 127;
2331 else
2332 qual[count].qual = sta->last_rx_signal -
2333 sta->last_rx_silence - 35;
2334 qual[count].level = HFA384X_LEVEL_TO_dBm(sta->last_rx_signal);
2335 qual[count].noise = HFA384X_LEVEL_TO_dBm(sta->last_rx_silence);
2336 qual[count].updated = sta->last_rx_updated;
2337
2338 sta->last_rx_updated = IW_QUAL_DBM;
2339
2340 count++;
2341 if (count >= buf_size)
2342 break;
2343 }
2344 spin_unlock_bh(&ap->sta_table_lock);
2345
2346 return count;
2347 }
2348
2349
2350 /* Translate our list of Access Points & Stations to a card independant
2351 * format that the Wireless Tools will understand - Jean II */
2352 int prism2_ap_translate_scan(struct net_device *dev,
2353 struct iw_request_info *info, char *buffer)
2354 {
2355 struct hostap_interface *iface;
2356 local_info_t *local;
2357 struct ap_data *ap;
2358 struct list_head *ptr;
2359 struct iw_event iwe;
2360 char *current_ev = buffer;
2361 char *end_buf = buffer + IW_SCAN_MAX_DATA;
2362 #if !defined(PRISM2_NO_KERNEL_IEEE80211_MGMT)
2363 char buf[64];
2364 #endif
2365
2366 iface = netdev_priv(dev);
2367 local = iface->local;
2368 ap = local->ap;
2369
2370 spin_lock_bh(&ap->sta_table_lock);
2371
2372 for (ptr = ap->sta_list.next; ptr != NULL && ptr != &ap->sta_list;
2373 ptr = ptr->next) {
2374 struct sta_info *sta = (struct sta_info *) ptr;
2375
2376 /* First entry *MUST* be the AP MAC address */
2377 memset(&iwe, 0, sizeof(iwe));
2378 iwe.cmd = SIOCGIWAP;
2379 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
2380 memcpy(iwe.u.ap_addr.sa_data, sta->addr, ETH_ALEN);
2381 iwe.len = IW_EV_ADDR_LEN;
2382 current_ev = iwe_stream_add_event(info, current_ev, end_buf,
2383 &iwe, IW_EV_ADDR_LEN);
2384
2385 /* Use the mode to indicate if it's a station or
2386 * an Access Point */
2387 memset(&iwe, 0, sizeof(iwe));
2388 iwe.cmd = SIOCGIWMODE;
2389 if (sta->ap)
2390 iwe.u.mode = IW_MODE_MASTER;
2391 else
2392 iwe.u.mode = IW_MODE_INFRA;
2393 iwe.len = IW_EV_UINT_LEN;
2394 current_ev = iwe_stream_add_event(info, current_ev, end_buf,
2395 &iwe, IW_EV_UINT_LEN);
2396
2397 /* Some quality */
2398 memset(&iwe, 0, sizeof(iwe));
2399 iwe.cmd = IWEVQUAL;
2400 if (sta->last_rx_silence == 0)
2401 iwe.u.qual.qual = sta->last_rx_signal < 27 ?
2402 0 : (sta->last_rx_signal - 27) * 92 / 127;
2403 else
2404 iwe.u.qual.qual = sta->last_rx_signal -
2405 sta->last_rx_silence - 35;
2406 iwe.u.qual.level = HFA384X_LEVEL_TO_dBm(sta->last_rx_signal);
2407 iwe.u.qual.noise = HFA384X_LEVEL_TO_dBm(sta->last_rx_silence);
2408 iwe.u.qual.updated = sta->last_rx_updated;
2409 iwe.len = IW_EV_QUAL_LEN;
2410 current_ev = iwe_stream_add_event(info, current_ev, end_buf,
2411 &iwe, IW_EV_QUAL_LEN);
2412
2413 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2414 if (sta->ap) {
2415 memset(&iwe, 0, sizeof(iwe));
2416 iwe.cmd = SIOCGIWESSID;
2417 iwe.u.data.length = sta->u.ap.ssid_len;
2418 iwe.u.data.flags = 1;
2419 current_ev = iwe_stream_add_point(info, current_ev,
2420 end_buf, &iwe,
2421 sta->u.ap.ssid);
2422
2423 memset(&iwe, 0, sizeof(iwe));
2424 iwe.cmd = SIOCGIWENCODE;
2425 if (sta->capability & WLAN_CAPABILITY_PRIVACY)
2426 iwe.u.data.flags =
2427 IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
2428 else
2429 iwe.u.data.flags = IW_ENCODE_DISABLED;
2430 current_ev = iwe_stream_add_point(info, current_ev,
2431 end_buf, &iwe,
2432 sta->u.ap.ssid);
2433
2434 if (sta->u.ap.channel > 0 &&
2435 sta->u.ap.channel <= FREQ_COUNT) {
2436 memset(&iwe, 0, sizeof(iwe));
2437 iwe.cmd = SIOCGIWFREQ;
2438 iwe.u.freq.m = freq_list[sta->u.ap.channel - 1]
2439 * 100000;
2440 iwe.u.freq.e = 1;
2441 current_ev = iwe_stream_add_event(
2442 info, current_ev, end_buf, &iwe,
2443 IW_EV_FREQ_LEN);
2444 }
2445
2446 memset(&iwe, 0, sizeof(iwe));
2447 iwe.cmd = IWEVCUSTOM;
2448 sprintf(buf, "beacon_interval=%d",
2449 sta->listen_interval);
2450 iwe.u.data.length = strlen(buf);
2451 current_ev = iwe_stream_add_point(info, current_ev,
2452 end_buf, &iwe, buf);
2453 }
2454 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2455
2456 sta->last_rx_updated = IW_QUAL_DBM;
2457
2458 /* To be continued, we should make good use of IWEVCUSTOM */
2459 }
2460
2461 spin_unlock_bh(&ap->sta_table_lock);
2462
2463 return current_ev - buffer;
2464 }
2465
2466
2467 static int prism2_hostapd_add_sta(struct ap_data *ap,
2468 struct prism2_hostapd_param *param)
2469 {
2470 struct sta_info *sta;
2471
2472 spin_lock_bh(&ap->sta_table_lock);
2473 sta = ap_get_sta(ap, param->sta_addr);
2474 if (sta)
2475 atomic_inc(&sta->users);
2476 spin_unlock_bh(&ap->sta_table_lock);
2477
2478 if (sta == NULL) {
2479 sta = ap_add_sta(ap, param->sta_addr);
2480 if (sta == NULL)
2481 return -1;
2482 }
2483
2484 if (!(sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
2485 hostap_event_new_sta(sta->local->dev, sta);
2486
2487 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC;
2488 sta->last_rx = jiffies;
2489 sta->aid = param->u.add_sta.aid;
2490 sta->capability = param->u.add_sta.capability;
2491 sta->tx_supp_rates = param->u.add_sta.tx_supp_rates;
2492 if (sta->tx_supp_rates & WLAN_RATE_1M)
2493 sta->supported_rates[0] = 2;
2494 if (sta->tx_supp_rates & WLAN_RATE_2M)
2495 sta->supported_rates[1] = 4;
2496 if (sta->tx_supp_rates & WLAN_RATE_5M5)
2497 sta->supported_rates[2] = 11;
2498 if (sta->tx_supp_rates & WLAN_RATE_11M)
2499 sta->supported_rates[3] = 22;
2500 prism2_check_tx_rates(sta);
2501 atomic_dec(&sta->users);
2502 return 0;
2503 }
2504
2505
2506 static int prism2_hostapd_remove_sta(struct ap_data *ap,
2507 struct prism2_hostapd_param *param)
2508 {
2509 struct sta_info *sta;
2510
2511 spin_lock_bh(&ap->sta_table_lock);
2512 sta = ap_get_sta(ap, param->sta_addr);
2513 if (sta) {
2514 ap_sta_hash_del(ap, sta);
2515 list_del(&sta->list);
2516 }
2517 spin_unlock_bh(&ap->sta_table_lock);
2518
2519 if (!sta)
2520 return -ENOENT;
2521
2522 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
2523 hostap_event_expired_sta(sta->local->dev, sta);
2524 ap_free_sta(ap, sta);
2525
2526 return 0;
2527 }
2528
2529
2530 static int prism2_hostapd_get_info_sta(struct ap_data *ap,
2531 struct prism2_hostapd_param *param)
2532 {
2533 struct sta_info *sta;
2534
2535 spin_lock_bh(&ap->sta_table_lock);
2536 sta = ap_get_sta(ap, param->sta_addr);
2537 if (sta)
2538 atomic_inc(&sta->users);
2539 spin_unlock_bh(&ap->sta_table_lock);
2540
2541 if (!sta)
2542 return -ENOENT;
2543
2544 param->u.get_info_sta.inactive_sec = (jiffies - sta->last_rx) / HZ;
2545
2546 atomic_dec(&sta->users);
2547
2548 return 1;
2549 }
2550
2551
2552 static int prism2_hostapd_set_flags_sta(struct ap_data *ap,
2553 struct prism2_hostapd_param *param)
2554 {
2555 struct sta_info *sta;
2556
2557 spin_lock_bh(&ap->sta_table_lock);
2558 sta = ap_get_sta(ap, param->sta_addr);
2559 if (sta) {
2560 sta->flags |= param->u.set_flags_sta.flags_or;
2561 sta->flags &= param->u.set_flags_sta.flags_and;
2562 }
2563 spin_unlock_bh(&ap->sta_table_lock);
2564
2565 if (!sta)
2566 return -ENOENT;
2567
2568 return 0;
2569 }
2570
2571
2572 static int prism2_hostapd_sta_clear_stats(struct ap_data *ap,
2573 struct prism2_hostapd_param *param)
2574 {
2575 struct sta_info *sta;
2576 int rate;
2577
2578 spin_lock_bh(&ap->sta_table_lock);
2579 sta = ap_get_sta(ap, param->sta_addr);
2580 if (sta) {
2581 sta->rx_packets = sta->tx_packets = 0;
2582 sta->rx_bytes = sta->tx_bytes = 0;
2583 for (rate = 0; rate < WLAN_RATE_COUNT; rate++) {
2584 sta->tx_count[rate] = 0;
2585 sta->rx_count[rate] = 0;
2586 }
2587 }
2588 spin_unlock_bh(&ap->sta_table_lock);
2589
2590 if (!sta)
2591 return -ENOENT;
2592
2593 return 0;
2594 }
2595
2596
2597 int prism2_hostapd(struct ap_data *ap, struct prism2_hostapd_param *param)
2598 {
2599 switch (param->cmd) {
2600 case PRISM2_HOSTAPD_FLUSH:
2601 ap_control_kickall(ap);
2602 return 0;
2603 case PRISM2_HOSTAPD_ADD_STA:
2604 return prism2_hostapd_add_sta(ap, param);
2605 case PRISM2_HOSTAPD_REMOVE_STA:
2606 return prism2_hostapd_remove_sta(ap, param);
2607 case PRISM2_HOSTAPD_GET_INFO_STA:
2608 return prism2_hostapd_get_info_sta(ap, param);
2609 case PRISM2_HOSTAPD_SET_FLAGS_STA:
2610 return prism2_hostapd_set_flags_sta(ap, param);
2611 case PRISM2_HOSTAPD_STA_CLEAR_STATS:
2612 return prism2_hostapd_sta_clear_stats(ap, param);
2613 default:
2614 printk(KERN_WARNING "prism2_hostapd: unknown cmd=%d\n",
2615 param->cmd);
2616 return -EOPNOTSUPP;
2617 }
2618 }
2619
2620
2621 /* Update station info for host-based TX rate control and return current
2622 * TX rate */
2623 static int ap_update_sta_tx_rate(struct sta_info *sta, struct net_device *dev)
2624 {
2625 int ret = sta->tx_rate;
2626 struct hostap_interface *iface;
2627 local_info_t *local;
2628
2629 iface = netdev_priv(dev);
2630 local = iface->local;
2631
2632 sta->tx_count[sta->tx_rate_idx]++;
2633 sta->tx_since_last_failure++;
2634 sta->tx_consecutive_exc = 0;
2635 if (sta->tx_since_last_failure >= WLAN_RATE_UPDATE_COUNT &&
2636 sta->tx_rate_idx < sta->tx_max_rate) {
2637 /* use next higher rate */
2638 int old_rate, new_rate;
2639 old_rate = new_rate = sta->tx_rate_idx;
2640 while (new_rate < sta->tx_max_rate) {
2641 new_rate++;
2642 if (ap_tx_rate_ok(new_rate, sta, local)) {
2643 sta->tx_rate_idx = new_rate;
2644 break;
2645 }
2646 }
2647 if (old_rate != sta->tx_rate_idx) {
2648 switch (sta->tx_rate_idx) {
2649 case 0: sta->tx_rate = 10; break;
2650 case 1: sta->tx_rate = 20; break;
2651 case 2: sta->tx_rate = 55; break;
2652 case 3: sta->tx_rate = 110; break;
2653 default: sta->tx_rate = 0; break;
2654 }
2655 PDEBUG(DEBUG_AP, "%s: STA %pM TX rate raised to %d\n",
2656 dev->name, sta->addr, sta->tx_rate);
2657 }
2658 sta->tx_since_last_failure = 0;
2659 }
2660
2661 return ret;
2662 }
2663
2664
2665 /* Called only from software IRQ. Called for each TX frame prior possible
2666 * encryption and transmit. */
2667 ap_tx_ret hostap_handle_sta_tx(local_info_t *local, struct hostap_tx_data *tx)
2668 {
2669 struct sta_info *sta = NULL;
2670 struct sk_buff *skb = tx->skb;
2671 int set_tim, ret;
2672 struct ieee80211_hdr *hdr;
2673 struct hostap_skb_tx_data *meta;
2674
2675 meta = (struct hostap_skb_tx_data *) skb->cb;
2676 ret = AP_TX_CONTINUE;
2677 if (local->ap == NULL || skb->len < 10 ||
2678 meta->iface->type == HOSTAP_INTERFACE_STA)
2679 goto out;
2680
2681 hdr = (struct ieee80211_hdr *) skb->data;
2682
2683 if (hdr->addr1[0] & 0x01) {
2684 /* broadcast/multicast frame - no AP related processing */
2685 if (local->ap->num_sta <= 0)
2686 ret = AP_TX_DROP;
2687 goto out;
2688 }
2689
2690 /* unicast packet - check whether destination STA is associated */
2691 spin_lock(&local->ap->sta_table_lock);
2692 sta = ap_get_sta(local->ap, hdr->addr1);
2693 if (sta)
2694 atomic_inc(&sta->users);
2695 spin_unlock(&local->ap->sta_table_lock);
2696
2697 if (local->iw_mode == IW_MODE_MASTER && sta == NULL &&
2698 !(meta->flags & HOSTAP_TX_FLAGS_WDS) &&
2699 meta->iface->type != HOSTAP_INTERFACE_MASTER &&
2700 meta->iface->type != HOSTAP_INTERFACE_AP) {
2701 local->ap->tx_drop_nonassoc++;
2702 ret = AP_TX_DROP;
2703 goto out;
2704 }
2705
2706 if (sta == NULL)
2707 goto out;
2708
2709 if (!(sta->flags & WLAN_STA_AUTHORIZED))
2710 ret = AP_TX_CONTINUE_NOT_AUTHORIZED;
2711
2712 /* Set tx_rate if using host-based TX rate control */
2713 if (!local->fw_tx_rate_control)
2714 local->ap->last_tx_rate = meta->rate =
2715 ap_update_sta_tx_rate(sta, local->dev);
2716
2717 if (local->iw_mode != IW_MODE_MASTER)
2718 goto out;
2719
2720 if (!(sta->flags & WLAN_STA_PS))
2721 goto out;
2722
2723 if (meta->flags & HOSTAP_TX_FLAGS_ADD_MOREDATA) {
2724 /* indicate to STA that more frames follow */
2725 hdr->frame_control |=
2726 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
2727 }
2728
2729 if (meta->flags & HOSTAP_TX_FLAGS_BUFFERED_FRAME) {
2730 /* packet was already buffered and now send due to
2731 * PS poll, so do not rebuffer it */
2732 goto out;
2733 }
2734
2735 if (skb_queue_len(&sta->tx_buf) >= STA_MAX_TX_BUFFER) {
2736 PDEBUG(DEBUG_PS, "%s: No more space in STA (%pM)'s"
2737 "PS mode buffer\n",
2738 local->dev->name, sta->addr);
2739 /* Make sure that TIM is set for the station (it might not be
2740 * after AP wlan hw reset). */
2741 /* FIX: should fix hw reset to restore bits based on STA
2742 * buffer state.. */
2743 hostap_set_tim(local, sta->aid, 1);
2744 sta->flags |= WLAN_STA_TIM;
2745 ret = AP_TX_DROP;
2746 goto out;
2747 }
2748
2749 /* STA in PS mode, buffer frame for later delivery */
2750 set_tim = skb_queue_empty(&sta->tx_buf);
2751 skb_queue_tail(&sta->tx_buf, skb);
2752 /* FIX: could save RX time to skb and expire buffered frames after
2753 * some time if STA does not poll for them */
2754
2755 if (set_tim) {
2756 if (sta->flags & WLAN_STA_TIM)
2757 PDEBUG(DEBUG_PS2, "Re-setting TIM for aid %d\n",
2758 sta->aid);
2759 hostap_set_tim(local, sta->aid, 1);
2760 sta->flags |= WLAN_STA_TIM;
2761 }
2762
2763 ret = AP_TX_BUFFERED;
2764
2765 out:
2766 if (sta != NULL) {
2767 if (ret == AP_TX_CONTINUE ||
2768 ret == AP_TX_CONTINUE_NOT_AUTHORIZED) {
2769 sta->tx_packets++;
2770 sta->tx_bytes += skb->len;
2771 sta->last_tx = jiffies;
2772 }
2773
2774 if ((ret == AP_TX_CONTINUE ||
2775 ret == AP_TX_CONTINUE_NOT_AUTHORIZED) &&
2776 sta->crypt && tx->host_encrypt) {
2777 tx->crypt = sta->crypt;
2778 tx->sta_ptr = sta; /* hostap_handle_sta_release() will
2779 * be called to release sta info
2780 * later */
2781 } else
2782 atomic_dec(&sta->users);
2783 }
2784
2785 return ret;
2786 }
2787
2788
2789 void hostap_handle_sta_release(void *ptr)
2790 {
2791 struct sta_info *sta = ptr;
2792 atomic_dec(&sta->users);
2793 }
2794
2795
2796 /* Called only as a tasklet (software IRQ) */
2797 void hostap_handle_sta_tx_exc(local_info_t *local, struct sk_buff *skb)
2798 {
2799 struct sta_info *sta;
2800 struct ieee80211_hdr *hdr;
2801 struct hostap_skb_tx_data *meta;
2802
2803 hdr = (struct ieee80211_hdr *) skb->data;
2804 meta = (struct hostap_skb_tx_data *) skb->cb;
2805
2806 spin_lock(&local->ap->sta_table_lock);
2807 sta = ap_get_sta(local->ap, hdr->addr1);
2808 if (!sta) {
2809 spin_unlock(&local->ap->sta_table_lock);
2810 PDEBUG(DEBUG_AP, "%s: Could not find STA %pM"
2811 " for this TX error (@%lu)\n",
2812 local->dev->name, hdr->addr1, jiffies);
2813 return;
2814 }
2815
2816 sta->tx_since_last_failure = 0;
2817 sta->tx_consecutive_exc++;
2818
2819 if (sta->tx_consecutive_exc >= WLAN_RATE_DECREASE_THRESHOLD &&
2820 sta->tx_rate_idx > 0 && meta->rate <= sta->tx_rate) {
2821 /* use next lower rate */
2822 int old, rate;
2823 old = rate = sta->tx_rate_idx;
2824 while (rate > 0) {
2825 rate--;
2826 if (ap_tx_rate_ok(rate, sta, local)) {
2827 sta->tx_rate_idx = rate;
2828 break;
2829 }
2830 }
2831 if (old != sta->tx_rate_idx) {
2832 switch (sta->tx_rate_idx) {
2833 case 0: sta->tx_rate = 10; break;
2834 case 1: sta->tx_rate = 20; break;
2835 case 2: sta->tx_rate = 55; break;
2836 case 3: sta->tx_rate = 110; break;
2837 default: sta->tx_rate = 0; break;
2838 }
2839 PDEBUG(DEBUG_AP,
2840 "%s: STA %pM TX rate lowered to %d\n",
2841 local->dev->name, sta->addr, sta->tx_rate);
2842 }
2843 sta->tx_consecutive_exc = 0;
2844 }
2845 spin_unlock(&local->ap->sta_table_lock);
2846 }
2847
2848
2849 static void hostap_update_sta_ps2(local_info_t *local, struct sta_info *sta,
2850 int pwrmgt, int type, int stype)
2851 {
2852 if (pwrmgt && !(sta->flags & WLAN_STA_PS)) {
2853 sta->flags |= WLAN_STA_PS;
2854 PDEBUG(DEBUG_PS2, "STA %pM changed to use PS "
2855 "mode (type=0x%02X, stype=0x%02X)\n",
2856 sta->addr, type >> 2, stype >> 4);
2857 } else if (!pwrmgt && (sta->flags & WLAN_STA_PS)) {
2858 sta->flags &= ~WLAN_STA_PS;
2859 PDEBUG(DEBUG_PS2, "STA %pM changed to not use "
2860 "PS mode (type=0x%02X, stype=0x%02X)\n",
2861 sta->addr, type >> 2, stype >> 4);
2862 if (type != IEEE80211_FTYPE_CTL ||
2863 stype != IEEE80211_STYPE_PSPOLL)
2864 schedule_packet_send(local, sta);
2865 }
2866 }
2867
2868
2869 /* Called only as a tasklet (software IRQ). Called for each RX frame to update
2870 * STA power saving state. pwrmgt is a flag from 802.11 frame_control field. */
2871 int hostap_update_sta_ps(local_info_t *local, struct ieee80211_hdr *hdr)
2872 {
2873 struct sta_info *sta;
2874 u16 fc;
2875
2876 spin_lock(&local->ap->sta_table_lock);
2877 sta = ap_get_sta(local->ap, hdr->addr2);
2878 if (sta)
2879 atomic_inc(&sta->users);
2880 spin_unlock(&local->ap->sta_table_lock);
2881
2882 if (!sta)
2883 return -1;
2884
2885 fc = le16_to_cpu(hdr->frame_control);
2886 hostap_update_sta_ps2(local, sta, fc & IEEE80211_FCTL_PM,
2887 fc & IEEE80211_FCTL_FTYPE,
2888 fc & IEEE80211_FCTL_STYPE);
2889
2890 atomic_dec(&sta->users);
2891 return 0;
2892 }
2893
2894
2895 /* Called only as a tasklet (software IRQ). Called for each RX frame after
2896 * getting RX header and payload from hardware. */
2897 ap_rx_ret hostap_handle_sta_rx(local_info_t *local, struct net_device *dev,
2898 struct sk_buff *skb,
2899 struct hostap_80211_rx_status *rx_stats,
2900 int wds)
2901 {
2902 int ret;
2903 struct sta_info *sta;
2904 u16 fc, type, stype;
2905 struct ieee80211_hdr *hdr;
2906
2907 if (local->ap == NULL)
2908 return AP_RX_CONTINUE;
2909
2910 hdr = (struct ieee80211_hdr *) skb->data;
2911
2912 fc = le16_to_cpu(hdr->frame_control);
2913 type = fc & IEEE80211_FCTL_FTYPE;
2914 stype = fc & IEEE80211_FCTL_STYPE;
2915
2916 spin_lock(&local->ap->sta_table_lock);
2917 sta = ap_get_sta(local->ap, hdr->addr2);
2918 if (sta)
2919 atomic_inc(&sta->users);
2920 spin_unlock(&local->ap->sta_table_lock);
2921
2922 if (sta && !(sta->flags & WLAN_STA_AUTHORIZED))
2923 ret = AP_RX_CONTINUE_NOT_AUTHORIZED;
2924 else
2925 ret = AP_RX_CONTINUE;
2926
2927
2928 if (fc & IEEE80211_FCTL_TODS) {
2929 if (!wds && (sta == NULL || !(sta->flags & WLAN_STA_ASSOC))) {
2930 if (local->hostapd) {
2931 prism2_rx_80211(local->apdev, skb, rx_stats,
2932 PRISM2_RX_NON_ASSOC);
2933 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2934 } else {
2935 printk(KERN_DEBUG "%s: dropped received packet"
2936 " from non-associated STA %pM"
2937 " (type=0x%02x, subtype=0x%02x)\n",
2938 dev->name, hdr->addr2,
2939 type >> 2, stype >> 4);
2940 hostap_rx(dev, skb, rx_stats);
2941 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2942 }
2943 ret = AP_RX_EXIT;
2944 goto out;
2945 }
2946 } else if (fc & IEEE80211_FCTL_FROMDS) {
2947 if (!wds) {
2948 /* FromDS frame - not for us; probably
2949 * broadcast/multicast in another BSS - drop */
2950 if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
2951 printk(KERN_DEBUG "Odd.. FromDS packet "
2952 "received with own BSSID\n");
2953 hostap_dump_rx_80211(dev->name, skb, rx_stats);
2954 }
2955 ret = AP_RX_DROP;
2956 goto out;
2957 }
2958 } else if (stype == IEEE80211_STYPE_NULLFUNC && sta == NULL &&
2959 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
2960
2961 if (local->hostapd) {
2962 prism2_rx_80211(local->apdev, skb, rx_stats,
2963 PRISM2_RX_NON_ASSOC);
2964 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2965 } else {
2966 /* At least Lucent f/w seems to send data::nullfunc
2967 * frames with no ToDS flag when the current AP returns
2968 * after being unavailable for some time. Speed up
2969 * re-association by informing the station about it not
2970 * being associated. */
2971 printk(KERN_DEBUG "%s: rejected received nullfunc frame"
2972 " without ToDS from not associated STA %pM\n",
2973 dev->name, hdr->addr2);
2974 hostap_rx(dev, skb, rx_stats);
2975 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2976 }
2977 ret = AP_RX_EXIT;
2978 goto out;
2979 } else if (stype == IEEE80211_STYPE_NULLFUNC) {
2980 /* At least Lucent cards seem to send periodic nullfunc
2981 * frames with ToDS. Let these through to update SQ
2982 * stats and PS state. Nullfunc frames do not contain
2983 * any data and they will be dropped below. */
2984 } else {
2985 /* If BSSID (Addr3) is foreign, this frame is a normal
2986 * broadcast frame from an IBSS network. Drop it silently.
2987 * If BSSID is own, report the dropping of this frame. */
2988 if (memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
2989 printk(KERN_DEBUG "%s: dropped received packet from %pM"
2990 " with no ToDS flag "
2991 "(type=0x%02x, subtype=0x%02x)\n", dev->name,
2992 hdr->addr2, type >> 2, stype >> 4);
2993 hostap_dump_rx_80211(dev->name, skb, rx_stats);
2994 }
2995 ret = AP_RX_DROP;
2996 goto out;
2997 }
2998
2999 if (sta) {
3000 hostap_update_sta_ps2(local, sta, fc & IEEE80211_FCTL_PM,
3001 type, stype);
3002
3003 sta->rx_packets++;
3004 sta->rx_bytes += skb->len;
3005 sta->last_rx = jiffies;
3006 }
3007
3008 if (local->ap->nullfunc_ack && stype == IEEE80211_STYPE_NULLFUNC &&
3009 fc & IEEE80211_FCTL_TODS) {
3010 if (local->hostapd) {
3011 prism2_rx_80211(local->apdev, skb, rx_stats,
3012 PRISM2_RX_NULLFUNC_ACK);
3013 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
3014 } else {
3015 /* some STA f/w's seem to require control::ACK frame
3016 * for data::nullfunc, but Prism2 f/w 0.8.0 (at least
3017 * from Compaq) does not send this.. Try to generate
3018 * ACK for these frames from the host driver to make
3019 * power saving work with, e.g., Lucent WaveLAN f/w */
3020 hostap_rx(dev, skb, rx_stats);
3021 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
3022 }
3023 ret = AP_RX_EXIT;
3024 goto out;
3025 }
3026
3027 out:
3028 if (sta)
3029 atomic_dec(&sta->users);
3030
3031 return ret;
3032 }
3033
3034
3035 /* Called only as a tasklet (software IRQ) */
3036 int hostap_handle_sta_crypto(local_info_t *local,
3037 struct ieee80211_hdr *hdr,
3038 struct lib80211_crypt_data **crypt,
3039 void **sta_ptr)
3040 {
3041 struct sta_info *sta;
3042
3043 spin_lock(&local->ap->sta_table_lock);
3044 sta = ap_get_sta(local->ap, hdr->addr2);
3045 if (sta)
3046 atomic_inc(&sta->users);
3047 spin_unlock(&local->ap->sta_table_lock);
3048
3049 if (!sta)
3050 return -1;
3051
3052 if (sta->crypt) {
3053 *crypt = sta->crypt;
3054 *sta_ptr = sta;
3055 /* hostap_handle_sta_release() will be called to release STA
3056 * info */
3057 } else
3058 atomic_dec(&sta->users);
3059
3060 return 0;
3061 }
3062
3063
3064 /* Called only as a tasklet (software IRQ) */
3065 int hostap_is_sta_assoc(struct ap_data *ap, u8 *sta_addr)
3066 {
3067 struct sta_info *sta;
3068 int ret = 0;
3069
3070 spin_lock(&ap->sta_table_lock);
3071 sta = ap_get_sta(ap, sta_addr);
3072 if (sta != NULL && (sta->flags & WLAN_STA_ASSOC) && !sta->ap)
3073 ret = 1;
3074 spin_unlock(&ap->sta_table_lock);
3075
3076 return ret;
3077 }
3078
3079
3080 /* Called only as a tasklet (software IRQ) */
3081 int hostap_is_sta_authorized(struct ap_data *ap, u8 *sta_addr)
3082 {
3083 struct sta_info *sta;
3084 int ret = 0;
3085
3086 spin_lock(&ap->sta_table_lock);
3087 sta = ap_get_sta(ap, sta_addr);
3088 if (sta != NULL && (sta->flags & WLAN_STA_ASSOC) && !sta->ap &&
3089 ((sta->flags & WLAN_STA_AUTHORIZED) ||
3090 ap->local->ieee_802_1x == 0))
3091 ret = 1;
3092 spin_unlock(&ap->sta_table_lock);
3093
3094 return ret;
3095 }
3096
3097
3098 /* Called only as a tasklet (software IRQ) */
3099 int hostap_add_sta(struct ap_data *ap, u8 *sta_addr)
3100 {
3101 struct sta_info *sta;
3102 int ret = 1;
3103
3104 if (!ap)
3105 return -1;
3106
3107 spin_lock(&ap->sta_table_lock);
3108 sta = ap_get_sta(ap, sta_addr);
3109 if (sta)
3110 ret = 0;
3111 spin_unlock(&ap->sta_table_lock);
3112
3113 if (ret == 1) {
3114 sta = ap_add_sta(ap, sta_addr);
3115 if (!sta)
3116 return -1;
3117 sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
3118 sta->ap = 1;
3119 memset(sta->supported_rates, 0, sizeof(sta->supported_rates));
3120 /* No way of knowing which rates are supported since we did not
3121 * get supported rates element from beacon/assoc req. Assume
3122 * that remote end supports all 802.11b rates. */
3123 sta->supported_rates[0] = 0x82;
3124 sta->supported_rates[1] = 0x84;
3125 sta->supported_rates[2] = 0x0b;
3126 sta->supported_rates[3] = 0x16;
3127 sta->tx_supp_rates = WLAN_RATE_1M | WLAN_RATE_2M |
3128 WLAN_RATE_5M5 | WLAN_RATE_11M;
3129 sta->tx_rate = 110;
3130 sta->tx_max_rate = sta->tx_rate_idx = 3;
3131 }
3132
3133 return ret;
3134 }
3135
3136
3137 /* Called only as a tasklet (software IRQ) */
3138 int hostap_update_rx_stats(struct ap_data *ap,
3139 struct ieee80211_hdr *hdr,
3140 struct hostap_80211_rx_status *rx_stats)
3141 {
3142 struct sta_info *sta;
3143
3144 if (!ap)
3145 return -1;
3146
3147 spin_lock(&ap->sta_table_lock);
3148 sta = ap_get_sta(ap, hdr->addr2);
3149 if (sta) {
3150 sta->last_rx_silence = rx_stats->noise;
3151 sta->last_rx_signal = rx_stats->signal;
3152 sta->last_rx_rate = rx_stats->rate;
3153 sta->last_rx_updated = IW_QUAL_ALL_UPDATED | IW_QUAL_DBM;
3154 if (rx_stats->rate == 10)
3155 sta->rx_count[0]++;
3156 else if (rx_stats->rate == 20)
3157 sta->rx_count[1]++;
3158 else if (rx_stats->rate == 55)
3159 sta->rx_count[2]++;
3160 else if (rx_stats->rate == 110)
3161 sta->rx_count[3]++;
3162 }
3163 spin_unlock(&ap->sta_table_lock);
3164
3165 return sta ? 0 : -1;
3166 }
3167
3168
3169 void hostap_update_rates(local_info_t *local)
3170 {
3171 struct sta_info *sta;
3172 struct ap_data *ap = local->ap;
3173
3174 if (!ap)
3175 return;
3176
3177 spin_lock_bh(&ap->sta_table_lock);
3178 list_for_each_entry(sta, &ap->sta_list, list) {
3179 prism2_check_tx_rates(sta);
3180 }
3181 spin_unlock_bh(&ap->sta_table_lock);
3182 }
3183
3184
3185 void * ap_crypt_get_ptrs(struct ap_data *ap, u8 *addr, int permanent,
3186 struct lib80211_crypt_data ***crypt)
3187 {
3188 struct sta_info *sta;
3189
3190 spin_lock_bh(&ap->sta_table_lock);
3191 sta = ap_get_sta(ap, addr);
3192 if (sta)
3193 atomic_inc(&sta->users);
3194 spin_unlock_bh(&ap->sta_table_lock);
3195
3196 if (!sta && permanent)
3197 sta = ap_add_sta(ap, addr);
3198
3199 if (!sta)
3200 return NULL;
3201
3202 if (permanent)
3203 sta->flags |= WLAN_STA_PERM;
3204
3205 *crypt = &sta->crypt;
3206
3207 return sta;
3208 }
3209
3210
3211 void hostap_add_wds_links(local_info_t *local)
3212 {
3213 struct ap_data *ap = local->ap;
3214 struct sta_info *sta;
3215
3216 spin_lock_bh(&ap->sta_table_lock);
3217 list_for_each_entry(sta, &ap->sta_list, list) {
3218 if (sta->ap)
3219 hostap_wds_link_oper(local, sta->addr, WDS_ADD);
3220 }
3221 spin_unlock_bh(&ap->sta_table_lock);
3222
3223 schedule_work(&local->ap->wds_oper_queue);
3224 }
3225
3226
3227 void hostap_wds_link_oper(local_info_t *local, u8 *addr, wds_oper_type type)
3228 {
3229 struct wds_oper_data *entry;
3230
3231 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
3232 if (!entry)
3233 return;
3234 memcpy(entry->addr, addr, ETH_ALEN);
3235 entry->type = type;
3236 spin_lock_bh(&local->lock);
3237 entry->next = local->ap->wds_oper_entries;
3238 local->ap->wds_oper_entries = entry;
3239 spin_unlock_bh(&local->lock);
3240
3241 schedule_work(&local->ap->wds_oper_queue);
3242 }
3243
3244
3245 EXPORT_SYMBOL(hostap_init_data);
3246 EXPORT_SYMBOL(hostap_init_ap_proc);
3247 EXPORT_SYMBOL(hostap_free_data);
3248 EXPORT_SYMBOL(hostap_check_sta_fw_version);
3249 EXPORT_SYMBOL(hostap_handle_sta_tx_exc);
3250 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
3251 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
Tomato firmware and modifications.