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[hh.org.git] / drivers / net / wireless / hostap / hostap_ap.c
blobba13125024cb35d54fa882a518d640a5f665c2c7
1 /*
2 * Intersil Prism2 driver with Host AP (software access point) support
3 * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
4 * <jkmaline@cc.hut.fi>
5 * Copyright (c) 2002-2005, Jouni Malinen <jkmaline@cc.hut.fi>
6 *
7 * This file is to be included into hostap.c when S/W AP functionality is
8 * compiled.
9 *
10 * AP: FIX:
11 * - if unicast Class 2 (assoc,reassoc,disassoc) frame received from
12 * unauthenticated STA, send deauth. frame (8802.11: 5.5)
13 * - if unicast Class 3 (data with to/from DS,deauth,pspoll) frame received
14 * from authenticated, but unassoc STA, send disassoc frame (8802.11: 5.5)
15 * - if unicast Class 3 received from unauthenticated STA, send deauth. frame
16 * (8802.11: 5.5)
17 */
18
19 #include <linux/proc_fs.h>
20 #include <linux/delay.h>
21 #include <linux/random.h>
22
23 #include "hostap_wlan.h"
24 #include "hostap.h"
25 #include "hostap_ap.h"
26
27 static int other_ap_policy[MAX_PARM_DEVICES] = { AP_OTHER_AP_SKIP_ALL,
28 DEF_INTS };
29 module_param_array(other_ap_policy, int, NULL, 0444);
30 MODULE_PARM_DESC(other_ap_policy, "Other AP beacon monitoring policy (0-3)");
31
32 static int ap_max_inactivity[MAX_PARM_DEVICES] = { AP_MAX_INACTIVITY_SEC,
33 DEF_INTS };
34 module_param_array(ap_max_inactivity, int, NULL, 0444);
35 MODULE_PARM_DESC(ap_max_inactivity, "AP timeout (in seconds) for station "
36 "inactivity");
37
38 static int ap_bridge_packets[MAX_PARM_DEVICES] = { 1, DEF_INTS };
39 module_param_array(ap_bridge_packets, int, NULL, 0444);
40 MODULE_PARM_DESC(ap_bridge_packets, "Bridge packets directly between "
41 "stations");
42
43 static int autom_ap_wds[MAX_PARM_DEVICES] = { 0, DEF_INTS };
44 module_param_array(autom_ap_wds, int, NULL, 0444);
45 MODULE_PARM_DESC(autom_ap_wds, "Add WDS connections to other APs "
46 "automatically");
47
48
49 static struct sta_info* ap_get_sta(struct ap_data *ap, u8 *sta);
50 static void hostap_event_expired_sta(struct net_device *dev,
51 struct sta_info *sta);
52 static void handle_add_proc_queue(void *data);
53
54 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
55 static void handle_wds_oper_queue(void *data);
56 static void prism2_send_mgmt(struct net_device *dev,
57 u16 type_subtype, char *body,
58 int body_len, u8 *addr, u16 tx_cb_idx);
59 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
60
61
62 #ifndef PRISM2_NO_PROCFS_DEBUG
63 static int ap_debug_proc_read(char *page, char **start, off_t off,
64 int count, int *eof, void *data)
65 {
66 char *p = page;
67 struct ap_data *ap = (struct ap_data *) data;
68
69 if (off != 0) {
70 *eof = 1;
71 return 0;
72 }
73
74 p += sprintf(p, "BridgedUnicastFrames=%u\n", ap->bridged_unicast);
75 p += sprintf(p, "BridgedMulticastFrames=%u\n", ap->bridged_multicast);
76 p += sprintf(p, "max_inactivity=%u\n", ap->max_inactivity / HZ);
77 p += sprintf(p, "bridge_packets=%u\n", ap->bridge_packets);
78 p += sprintf(p, "nullfunc_ack=%u\n", ap->nullfunc_ack);
79 p += sprintf(p, "autom_ap_wds=%u\n", ap->autom_ap_wds);
80 p += sprintf(p, "auth_algs=%u\n", ap->local->auth_algs);
81 p += sprintf(p, "tx_drop_nonassoc=%u\n", ap->tx_drop_nonassoc);
82
83 return (p - page);
84 }
85 #endif /* PRISM2_NO_PROCFS_DEBUG */
86
87
88 static void ap_sta_hash_add(struct ap_data *ap, struct sta_info *sta)
89 {
90 sta->hnext = ap->sta_hash[STA_HASH(sta->addr)];
91 ap->sta_hash[STA_HASH(sta->addr)] = sta;
92 }
93
94 static void ap_sta_hash_del(struct ap_data *ap, struct sta_info *sta)
95 {
96 struct sta_info *s;
97
98 s = ap->sta_hash[STA_HASH(sta->addr)];
99 if (s == NULL) return;
100 if (memcmp(s->addr, sta->addr, ETH_ALEN) == 0) {
101 ap->sta_hash[STA_HASH(sta->addr)] = s->hnext;
102 return;
103 }
104
105 while (s->hnext != NULL && memcmp(s->hnext->addr, sta->addr, ETH_ALEN)
106 != 0)
107 s = s->hnext;
108 if (s->hnext != NULL)
109 s->hnext = s->hnext->hnext;
110 else
111 printk("AP: could not remove STA " MACSTR " from hash table\n",
112 MAC2STR(sta->addr));
113 }
114
115 static void ap_free_sta(struct ap_data *ap, struct sta_info *sta)
116 {
117 if (sta->ap && sta->local)
118 hostap_event_expired_sta(sta->local->dev, sta);
119
120 if (ap->proc != NULL) {
121 char name[20];
122 sprintf(name, MACSTR, MAC2STR(sta->addr));
123 remove_proc_entry(name, ap->proc);
124 }
125
126 if (sta->crypt) {
127 sta->crypt->ops->deinit(sta->crypt->priv);
128 kfree(sta->crypt);
129 sta->crypt = NULL;
130 }
131
132 skb_queue_purge(&sta->tx_buf);
133
134 ap->num_sta--;
135 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
136 if (sta->aid > 0)
137 ap->sta_aid[sta->aid - 1] = NULL;
138
139 if (!sta->ap && sta->u.sta.challenge)
140 kfree(sta->u.sta.challenge);
141 del_timer(&sta->timer);
142 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
143
144 kfree(sta);
145 }
146
147
148 static void hostap_set_tim(local_info_t *local, int aid, int set)
149 {
150 if (local->func->set_tim)
151 local->func->set_tim(local->dev, aid, set);
152 }
153
154
155 static void hostap_event_new_sta(struct net_device *dev, struct sta_info *sta)
156 {
157 union iwreq_data wrqu;
158 memset(&wrqu, 0, sizeof(wrqu));
159 memcpy(wrqu.addr.sa_data, sta->addr, ETH_ALEN);
160 wrqu.addr.sa_family = ARPHRD_ETHER;
161 wireless_send_event(dev, IWEVREGISTERED, &wrqu, NULL);
162 }
163
164
165 static void hostap_event_expired_sta(struct net_device *dev,
166 struct sta_info *sta)
167 {
168 union iwreq_data wrqu;
169 memset(&wrqu, 0, sizeof(wrqu));
170 memcpy(wrqu.addr.sa_data, sta->addr, ETH_ALEN);
171 wrqu.addr.sa_family = ARPHRD_ETHER;
172 wireless_send_event(dev, IWEVEXPIRED, &wrqu, NULL);
173 }
174
175
176 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
177
178 static void ap_handle_timer(unsigned long data)
179 {
180 struct sta_info *sta = (struct sta_info *) data;
181 local_info_t *local;
182 struct ap_data *ap;
183 unsigned long next_time = 0;
184 int was_assoc;
185
186 if (sta == NULL || sta->local == NULL || sta->local->ap == NULL) {
187 PDEBUG(DEBUG_AP, "ap_handle_timer() called with NULL data\n");
188 return;
189 }
190
191 local = sta->local;
192 ap = local->ap;
193 was_assoc = sta->flags & WLAN_STA_ASSOC;
194
195 if (atomic_read(&sta->users) != 0)
196 next_time = jiffies + HZ;
197 else if ((sta->flags & WLAN_STA_PERM) && !(sta->flags & WLAN_STA_AUTH))
198 next_time = jiffies + ap->max_inactivity;
199
200 if (time_before(jiffies, sta->last_rx + ap->max_inactivity)) {
201 /* station activity detected; reset timeout state */
202 sta->timeout_next = STA_NULLFUNC;
203 next_time = sta->last_rx + ap->max_inactivity;
204 } else if (sta->timeout_next == STA_DISASSOC &&
205 !(sta->flags & WLAN_STA_PENDING_POLL)) {
206 /* STA ACKed data nullfunc frame poll */
207 sta->timeout_next = STA_NULLFUNC;
208 next_time = jiffies + ap->max_inactivity;
209 }
210
211 if (next_time) {
212 sta->timer.expires = next_time;
213 add_timer(&sta->timer);
214 return;
215 }
216
217 if (sta->ap)
218 sta->timeout_next = STA_DEAUTH;
219
220 if (sta->timeout_next == STA_DEAUTH && !(sta->flags & WLAN_STA_PERM)) {
221 spin_lock(&ap->sta_table_lock);
222 ap_sta_hash_del(ap, sta);
223 list_del(&sta->list);
224 spin_unlock(&ap->sta_table_lock);
225 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
226 } else if (sta->timeout_next == STA_DISASSOC)
227 sta->flags &= ~WLAN_STA_ASSOC;
228
229 if (was_assoc && !(sta->flags & WLAN_STA_ASSOC) && !sta->ap)
230 hostap_event_expired_sta(local->dev, sta);
231
232 if (sta->timeout_next == STA_DEAUTH && sta->aid > 0 &&
233 !skb_queue_empty(&sta->tx_buf)) {
234 hostap_set_tim(local, sta->aid, 0);
235 sta->flags &= ~WLAN_STA_TIM;
236 }
237
238 if (sta->ap) {
239 if (ap->autom_ap_wds) {
240 PDEBUG(DEBUG_AP, "%s: removing automatic WDS "
241 "connection to AP " MACSTR "\n",
242 local->dev->name, MAC2STR(sta->addr));
243 hostap_wds_link_oper(local, sta->addr, WDS_DEL);
244 }
245 } else if (sta->timeout_next == STA_NULLFUNC) {
246 /* send data frame to poll STA and check whether this frame
247 * is ACKed */
248 /* FIX: IEEE80211_STYPE_NULLFUNC would be more appropriate, but
249 * it is apparently not retried so TX Exc events are not
250 * received for it */
251 sta->flags |= WLAN_STA_PENDING_POLL;
252 prism2_send_mgmt(local->dev, IEEE80211_FTYPE_DATA |
253 IEEE80211_STYPE_DATA, NULL, 0,
254 sta->addr, ap->tx_callback_poll);
255 } else {
256 int deauth = sta->timeout_next == STA_DEAUTH;
257 u16 resp;
258 PDEBUG(DEBUG_AP, "%s: sending %s info to STA " MACSTR
259 "(last=%lu, jiffies=%lu)\n",
260 local->dev->name,
261 deauth ? "deauthentication" : "disassociation",
262 MAC2STR(sta->addr), sta->last_rx, jiffies);
263
264 resp = cpu_to_le16(deauth ? WLAN_REASON_PREV_AUTH_NOT_VALID :
265 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
266 prism2_send_mgmt(local->dev, IEEE80211_FTYPE_MGMT |
267 (deauth ? IEEE80211_STYPE_DEAUTH :
268 IEEE80211_STYPE_DISASSOC),
269 (char *) &resp, 2, sta->addr, 0);
270 }
271
272 if (sta->timeout_next == STA_DEAUTH) {
273 if (sta->flags & WLAN_STA_PERM) {
274 PDEBUG(DEBUG_AP, "%s: STA " MACSTR " would have been "
275 "removed, but it has 'perm' flag\n",
276 local->dev->name, MAC2STR(sta->addr));
277 } else
278 ap_free_sta(ap, sta);
279 return;
280 }
281
282 if (sta->timeout_next == STA_NULLFUNC) {
283 sta->timeout_next = STA_DISASSOC;
284 sta->timer.expires = jiffies + AP_DISASSOC_DELAY;
285 } else {
286 sta->timeout_next = STA_DEAUTH;
287 sta->timer.expires = jiffies + AP_DEAUTH_DELAY;
288 }
289
290 add_timer(&sta->timer);
291 }
292
293
294 void hostap_deauth_all_stas(struct net_device *dev, struct ap_data *ap,
295 int resend)
296 {
297 u8 addr[ETH_ALEN];
298 u16 resp;
299 int i;
300
301 PDEBUG(DEBUG_AP, "%s: Deauthenticate all stations\n", dev->name);
302 memset(addr, 0xff, ETH_ALEN);
303
304 resp = __constant_cpu_to_le16(WLAN_REASON_PREV_AUTH_NOT_VALID);
305
306 /* deauth message sent; try to resend it few times; the message is
307 * broadcast, so it may be delayed until next DTIM; there is not much
308 * else we can do at this point since the driver is going to be shut
309 * down */
310 for (i = 0; i < 5; i++) {
311 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT |
312 IEEE80211_STYPE_DEAUTH,
313 (char *) &resp, 2, addr, 0);
314
315 if (!resend || ap->num_sta <= 0)
316 return;
317
318 mdelay(50);
319 }
320 }
321
322
323 static int ap_control_proc_read(char *page, char **start, off_t off,
324 int count, int *eof, void *data)
325 {
326 char *p = page;
327 struct ap_data *ap = (struct ap_data *) data;
328 char *policy_txt;
329 struct list_head *ptr;
330 struct mac_entry *entry;
331
332 if (off != 0) {
333 *eof = 1;
334 return 0;
335 }
336
337 switch (ap->mac_restrictions.policy) {
338 case MAC_POLICY_OPEN:
339 policy_txt = "open";
340 break;
341 case MAC_POLICY_ALLOW:
342 policy_txt = "allow";
343 break;
344 case MAC_POLICY_DENY:
345 policy_txt = "deny";
346 break;
347 default:
348 policy_txt = "unknown";
349 break;
350 };
351 p += sprintf(p, "MAC policy: %s\n", policy_txt);
352 p += sprintf(p, "MAC entries: %u\n", ap->mac_restrictions.entries);
353 p += sprintf(p, "MAC list:\n");
354 spin_lock_bh(&ap->mac_restrictions.lock);
355 for (ptr = ap->mac_restrictions.mac_list.next;
356 ptr != &ap->mac_restrictions.mac_list; ptr = ptr->next) {
357 if (p - page > PAGE_SIZE - 80) {
358 p += sprintf(p, "All entries did not fit one page.\n");
359 break;
360 }
361
362 entry = list_entry(ptr, struct mac_entry, list);
363 p += sprintf(p, MACSTR "\n", MAC2STR(entry->addr));
364 }
365 spin_unlock_bh(&ap->mac_restrictions.lock);
366
367 return (p - page);
368 }
369
370
371 int ap_control_add_mac(struct mac_restrictions *mac_restrictions, u8 *mac)
372 {
373 struct mac_entry *entry;
374
375 entry = kmalloc(sizeof(struct mac_entry), GFP_KERNEL);
376 if (entry == NULL)
377 return -1;
378
379 memcpy(entry->addr, mac, ETH_ALEN);
380
381 spin_lock_bh(&mac_restrictions->lock);
382 list_add_tail(&entry->list, &mac_restrictions->mac_list);
383 mac_restrictions->entries++;
384 spin_unlock_bh(&mac_restrictions->lock);
385
386 return 0;
387 }
388
389
390 int ap_control_del_mac(struct mac_restrictions *mac_restrictions, u8 *mac)
391 {
392 struct list_head *ptr;
393 struct mac_entry *entry;
394
395 spin_lock_bh(&mac_restrictions->lock);
396 for (ptr = mac_restrictions->mac_list.next;
397 ptr != &mac_restrictions->mac_list; ptr = ptr->next) {
398 entry = list_entry(ptr, struct mac_entry, list);
399
400 if (memcmp(entry->addr, mac, ETH_ALEN) == 0) {
401 list_del(ptr);
402 kfree(entry);
403 mac_restrictions->entries--;
404 spin_unlock_bh(&mac_restrictions->lock);
405 return 0;
406 }
407 }
408 spin_unlock_bh(&mac_restrictions->lock);
409 return -1;
410 }
411
412
413 static int ap_control_mac_deny(struct mac_restrictions *mac_restrictions,
414 u8 *mac)
415 {
416 struct list_head *ptr;
417 struct mac_entry *entry;
418 int found = 0;
419
420 if (mac_restrictions->policy == MAC_POLICY_OPEN)
421 return 0;
422
423 spin_lock_bh(&mac_restrictions->lock);
424 for (ptr = mac_restrictions->mac_list.next;
425 ptr != &mac_restrictions->mac_list; ptr = ptr->next) {
426 entry = list_entry(ptr, struct mac_entry, list);
427
428 if (memcmp(entry->addr, mac, ETH_ALEN) == 0) {
429 found = 1;
430 break;
431 }
432 }
433 spin_unlock_bh(&mac_restrictions->lock);
434
435 if (mac_restrictions->policy == MAC_POLICY_ALLOW)
436 return !found;
437 else
438 return found;
439 }
440
441
442 void ap_control_flush_macs(struct mac_restrictions *mac_restrictions)
443 {
444 struct list_head *ptr, *n;
445 struct mac_entry *entry;
446
447 if (mac_restrictions->entries == 0)
448 return;
449
450 spin_lock_bh(&mac_restrictions->lock);
451 for (ptr = mac_restrictions->mac_list.next, n = ptr->next;
452 ptr != &mac_restrictions->mac_list;
453 ptr = n, n = ptr->next) {
454 entry = list_entry(ptr, struct mac_entry, list);
455 list_del(ptr);
456 kfree(entry);
457 }
458 mac_restrictions->entries = 0;
459 spin_unlock_bh(&mac_restrictions->lock);
460 }
461
462
463 int ap_control_kick_mac(struct ap_data *ap, struct net_device *dev, u8 *mac)
464 {
465 struct sta_info *sta;
466 u16 resp;
467
468 spin_lock_bh(&ap->sta_table_lock);
469 sta = ap_get_sta(ap, mac);
470 if (sta) {
471 ap_sta_hash_del(ap, sta);
472 list_del(&sta->list);
473 }
474 spin_unlock_bh(&ap->sta_table_lock);
475
476 if (!sta)
477 return -EINVAL;
478
479 resp = cpu_to_le16(WLAN_REASON_PREV_AUTH_NOT_VALID);
480 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_DEAUTH,
481 (char *) &resp, 2, sta->addr, 0);
482
483 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap)
484 hostap_event_expired_sta(dev, sta);
485
486 ap_free_sta(ap, sta);
487
488 return 0;
489 }
490
491 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
492
493
494 void ap_control_kickall(struct ap_data *ap)
495 {
496 struct list_head *ptr, *n;
497 struct sta_info *sta;
498
499 spin_lock_bh(&ap->sta_table_lock);
500 for (ptr = ap->sta_list.next, n = ptr->next; ptr != &ap->sta_list;
501 ptr = n, n = ptr->next) {
502 sta = list_entry(ptr, struct sta_info, list);
503 ap_sta_hash_del(ap, sta);
504 list_del(&sta->list);
505 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
506 hostap_event_expired_sta(sta->local->dev, sta);
507 ap_free_sta(ap, sta);
508 }
509 spin_unlock_bh(&ap->sta_table_lock);
510 }
511
512
513 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
514
515 #define PROC_LIMIT (PAGE_SIZE - 80)
516
517 static int prism2_ap_proc_read(char *page, char **start, off_t off,
518 int count, int *eof, void *data)
519 {
520 char *p = page;
521 struct ap_data *ap = (struct ap_data *) data;
522 struct list_head *ptr;
523 int i;
524
525 if (off > PROC_LIMIT) {
526 *eof = 1;
527 return 0;
528 }
529
530 p += sprintf(p, "# BSSID CHAN SIGNAL NOISE RATE SSID FLAGS\n");
531 spin_lock_bh(&ap->sta_table_lock);
532 for (ptr = ap->sta_list.next; ptr != &ap->sta_list; ptr = ptr->next) {
533 struct sta_info *sta = (struct sta_info *) ptr;
534
535 if (!sta->ap)
536 continue;
537
538 p += sprintf(p, MACSTR " %d %d %d %d '", MAC2STR(sta->addr),
539 sta->u.ap.channel, sta->last_rx_signal,
540 sta->last_rx_silence, sta->last_rx_rate);
541 for (i = 0; i < sta->u.ap.ssid_len; i++)
542 p += sprintf(p, ((sta->u.ap.ssid[i] >= 32 &&
543 sta->u.ap.ssid[i] < 127) ?
544 "%c" : "<%02x>"),
545 sta->u.ap.ssid[i]);
546 p += sprintf(p, "'");
547 if (sta->capability & WLAN_CAPABILITY_ESS)
548 p += sprintf(p, " [ESS]");
549 if (sta->capability & WLAN_CAPABILITY_IBSS)
550 p += sprintf(p, " [IBSS]");
551 if (sta->capability & WLAN_CAPABILITY_PRIVACY)
552 p += sprintf(p, " [WEP]");
553 p += sprintf(p, "\n");
554
555 if ((p - page) > PROC_LIMIT) {
556 printk(KERN_DEBUG "hostap: ap proc did not fit\n");
557 break;
558 }
559 }
560 spin_unlock_bh(&ap->sta_table_lock);
561
562 if ((p - page) <= off) {
563 *eof = 1;
564 return 0;
565 }
566
567 *start = page + off;
568
569 return (p - page - off);
570 }
571 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
572
573
574 void hostap_check_sta_fw_version(struct ap_data *ap, int sta_fw_ver)
575 {
576 if (!ap)
577 return;
578
579 if (sta_fw_ver == PRISM2_FW_VER(0,8,0)) {
580 PDEBUG(DEBUG_AP, "Using data::nullfunc ACK workaround - "
581 "firmware upgrade recommended\n");
582 ap->nullfunc_ack = 1;
583 } else
584 ap->nullfunc_ack = 0;
585
586 if (sta_fw_ver == PRISM2_FW_VER(1,4,2)) {
587 printk(KERN_WARNING "%s: Warning: secondary station firmware "
588 "version 1.4.2 does not seem to work in Host AP mode\n",
589 ap->local->dev->name);
590 }
591 }
592
593
594 /* Called only as a tasklet (software IRQ) */
595 static void hostap_ap_tx_cb(struct sk_buff *skb, int ok, void *data)
596 {
597 struct ap_data *ap = data;
598 u16 fc;
599 struct ieee80211_hdr_4addr *hdr;
600
601 if (!ap->local->hostapd || !ap->local->apdev) {
602 dev_kfree_skb(skb);
603 return;
604 }
605
606 hdr = (struct ieee80211_hdr_4addr *) skb->data;
607 fc = le16_to_cpu(hdr->frame_ctl);
608
609 /* Pass the TX callback frame to the hostapd; use 802.11 header version
610 * 1 to indicate failure (no ACK) and 2 success (frame ACKed) */
611
612 fc &= ~IEEE80211_FCTL_VERS;
613 fc |= ok ? BIT(1) : BIT(0);
614 hdr->frame_ctl = cpu_to_le16(fc);
615
616 skb->dev = ap->local->apdev;
617 skb_pull(skb, hostap_80211_get_hdrlen(fc));
618 skb->pkt_type = PACKET_OTHERHOST;
619 skb->protocol = __constant_htons(ETH_P_802_2);
620 memset(skb->cb, 0, sizeof(skb->cb));
621 netif_rx(skb);
622 }
623
624
625 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
626 /* Called only as a tasklet (software IRQ) */
627 static void hostap_ap_tx_cb_auth(struct sk_buff *skb, int ok, void *data)
628 {
629 struct ap_data *ap = data;
630 struct net_device *dev = ap->local->dev;
631 struct ieee80211_hdr_4addr *hdr;
632 u16 fc, *pos, auth_alg, auth_transaction, status;
633 struct sta_info *sta = NULL;
634 char *txt = NULL;
635
636 if (ap->local->hostapd) {
637 dev_kfree_skb(skb);
638 return;
639 }
640
641 hdr = (struct ieee80211_hdr_4addr *) skb->data;
642 fc = le16_to_cpu(hdr->frame_ctl);
643 if (WLAN_FC_GET_TYPE(fc) != IEEE80211_FTYPE_MGMT ||
644 WLAN_FC_GET_STYPE(fc) != IEEE80211_STYPE_AUTH ||
645 skb->len < IEEE80211_MGMT_HDR_LEN + 6) {
646 printk(KERN_DEBUG "%s: hostap_ap_tx_cb_auth received invalid "
647 "frame\n", dev->name);
648 dev_kfree_skb(skb);
649 return;
650 }
651
652 pos = (u16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
653 auth_alg = le16_to_cpu(*pos++);
654 auth_transaction = le16_to_cpu(*pos++);
655 status = le16_to_cpu(*pos++);
656
657 if (!ok) {
658 txt = "frame was not ACKed";
659 goto done;
660 }
661
662 spin_lock(&ap->sta_table_lock);
663 sta = ap_get_sta(ap, hdr->addr1);
664 if (sta)
665 atomic_inc(&sta->users);
666 spin_unlock(&ap->sta_table_lock);
667
668 if (!sta) {
669 txt = "STA not found";
670 goto done;
671 }
672
673 if (status == WLAN_STATUS_SUCCESS &&
674 ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 2) ||
675 (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 4))) {
676 txt = "STA authenticated";
677 sta->flags |= WLAN_STA_AUTH;
678 sta->last_auth = jiffies;
679 } else if (status != WLAN_STATUS_SUCCESS)
680 txt = "authentication failed";
681
682 done:
683 if (sta)
684 atomic_dec(&sta->users);
685 if (txt) {
686 PDEBUG(DEBUG_AP, "%s: " MACSTR " auth_cb - alg=%d trans#=%d "
687 "status=%d - %s\n",
688 dev->name, MAC2STR(hdr->addr1), auth_alg,
689 auth_transaction, status, txt);
690 }
691 dev_kfree_skb(skb);
692 }
693
694
695 /* Called only as a tasklet (software IRQ) */
696 static void hostap_ap_tx_cb_assoc(struct sk_buff *skb, int ok, void *data)
697 {
698 struct ap_data *ap = data;
699 struct net_device *dev = ap->local->dev;
700 struct ieee80211_hdr_4addr *hdr;
701 u16 fc, *pos, status;
702 struct sta_info *sta = NULL;
703 char *txt = NULL;
704
705 if (ap->local->hostapd) {
706 dev_kfree_skb(skb);
707 return;
708 }
709
710 hdr = (struct ieee80211_hdr_4addr *) skb->data;
711 fc = le16_to_cpu(hdr->frame_ctl);
712 if (WLAN_FC_GET_TYPE(fc) != IEEE80211_FTYPE_MGMT ||
713 (WLAN_FC_GET_STYPE(fc) != IEEE80211_STYPE_ASSOC_RESP &&
714 WLAN_FC_GET_STYPE(fc) != IEEE80211_STYPE_REASSOC_RESP) ||
715 skb->len < IEEE80211_MGMT_HDR_LEN + 4) {
716 printk(KERN_DEBUG "%s: hostap_ap_tx_cb_assoc received invalid "
717 "frame\n", dev->name);
718 dev_kfree_skb(skb);
719 return;
720 }
721
722 if (!ok) {
723 txt = "frame was not ACKed";
724 goto done;
725 }
726
727 spin_lock(&ap->sta_table_lock);
728 sta = ap_get_sta(ap, hdr->addr1);
729 if (sta)
730 atomic_inc(&sta->users);
731 spin_unlock(&ap->sta_table_lock);
732
733 if (!sta) {
734 txt = "STA not found";
735 goto done;
736 }
737
738 pos = (u16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
739 pos++;
740 status = le16_to_cpu(*pos++);
741 if (status == WLAN_STATUS_SUCCESS) {
742 if (!(sta->flags & WLAN_STA_ASSOC))
743 hostap_event_new_sta(dev, sta);
744 txt = "STA associated";
745 sta->flags |= WLAN_STA_ASSOC;
746 sta->last_assoc = jiffies;
747 } else
748 txt = "association failed";
749
750 done:
751 if (sta)
752 atomic_dec(&sta->users);
753 if (txt) {
754 PDEBUG(DEBUG_AP, "%s: " MACSTR " assoc_cb - %s\n",
755 dev->name, MAC2STR(hdr->addr1), txt);
756 }
757 dev_kfree_skb(skb);
758 }
759
760 /* Called only as a tasklet (software IRQ); TX callback for poll frames used
761 * in verifying whether the STA is still present. */
762 static void hostap_ap_tx_cb_poll(struct sk_buff *skb, int ok, void *data)
763 {
764 struct ap_data *ap = data;
765 struct ieee80211_hdr_4addr *hdr;
766 struct sta_info *sta;
767
768 if (skb->len < 24)
769 goto fail;
770 hdr = (struct ieee80211_hdr_4addr *) skb->data;
771 if (ok) {
772 spin_lock(&ap->sta_table_lock);
773 sta = ap_get_sta(ap, hdr->addr1);
774 if (sta)
775 sta->flags &= ~WLAN_STA_PENDING_POLL;
776 spin_unlock(&ap->sta_table_lock);
777 } else {
778 PDEBUG(DEBUG_AP, "%s: STA " MACSTR " did not ACK activity "
779 "poll frame\n", ap->local->dev->name,
780 MAC2STR(hdr->addr1));
781 }
782
783 fail:
784 dev_kfree_skb(skb);
785 }
786 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
787
788
789 void hostap_init_data(local_info_t *local)
790 {
791 struct ap_data *ap = local->ap;
792
793 if (ap == NULL) {
794 printk(KERN_WARNING "hostap_init_data: ap == NULL\n");
795 return;
796 }
797 memset(ap, 0, sizeof(struct ap_data));
798 ap->local = local;
799
800 ap->ap_policy = GET_INT_PARM(other_ap_policy, local->card_idx);
801 ap->bridge_packets = GET_INT_PARM(ap_bridge_packets, local->card_idx);
802 ap->max_inactivity =
803 GET_INT_PARM(ap_max_inactivity, local->card_idx) * HZ;
804 ap->autom_ap_wds = GET_INT_PARM(autom_ap_wds, local->card_idx);
805
806 spin_lock_init(&ap->sta_table_lock);
807 INIT_LIST_HEAD(&ap->sta_list);
808
809 /* Initialize task queue structure for AP management */
810 INIT_WORK(&local->ap->add_sta_proc_queue, handle_add_proc_queue, ap);
811
812 ap->tx_callback_idx =
813 hostap_tx_callback_register(local, hostap_ap_tx_cb, ap);
814 if (ap->tx_callback_idx == 0)
815 printk(KERN_WARNING "%s: failed to register TX callback for "
816 "AP\n", local->dev->name);
817 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
818 INIT_WORK(&local->ap->wds_oper_queue, handle_wds_oper_queue, local);
819
820 ap->tx_callback_auth =
821 hostap_tx_callback_register(local, hostap_ap_tx_cb_auth, ap);
822 ap->tx_callback_assoc =
823 hostap_tx_callback_register(local, hostap_ap_tx_cb_assoc, ap);
824 ap->tx_callback_poll =
825 hostap_tx_callback_register(local, hostap_ap_tx_cb_poll, ap);
826 if (ap->tx_callback_auth == 0 || ap->tx_callback_assoc == 0 ||
827 ap->tx_callback_poll == 0)
828 printk(KERN_WARNING "%s: failed to register TX callback for "
829 "AP\n", local->dev->name);
830
831 spin_lock_init(&ap->mac_restrictions.lock);
832 INIT_LIST_HEAD(&ap->mac_restrictions.mac_list);
833 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
834
835 ap->initialized = 1;
836 }
837
838
839 void hostap_init_ap_proc(local_info_t *local)
840 {
841 struct ap_data *ap = local->ap;
842
843 ap->proc = local->proc;
844 if (ap->proc == NULL)
845 return;
846
847 #ifndef PRISM2_NO_PROCFS_DEBUG
848 create_proc_read_entry("ap_debug", 0, ap->proc,
849 ap_debug_proc_read, ap);
850 #endif /* PRISM2_NO_PROCFS_DEBUG */
851
852 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
853 create_proc_read_entry("ap_control", 0, ap->proc,
854 ap_control_proc_read, ap);
855 create_proc_read_entry("ap", 0, ap->proc,
856 prism2_ap_proc_read, ap);
857 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
858
859 }
860
861
862 void hostap_free_data(struct ap_data *ap)
863 {
864 struct list_head *n, *ptr;
865
866 if (ap == NULL || !ap->initialized) {
867 printk(KERN_DEBUG "hostap_free_data: ap has not yet been "
868 "initialized - skip resource freeing\n");
869 return;
870 }
871
872 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
873 if (ap->crypt)
874 ap->crypt->deinit(ap->crypt_priv);
875 ap->crypt = ap->crypt_priv = NULL;
876 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
877
878 list_for_each_safe(ptr, n, &ap->sta_list) {
879 struct sta_info *sta = list_entry(ptr, struct sta_info, list);
880 ap_sta_hash_del(ap, sta);
881 list_del(&sta->list);
882 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
883 hostap_event_expired_sta(sta->local->dev, sta);
884 ap_free_sta(ap, sta);
885 }
886
887 #ifndef PRISM2_NO_PROCFS_DEBUG
888 if (ap->proc != NULL) {
889 remove_proc_entry("ap_debug", ap->proc);
890 }
891 #endif /* PRISM2_NO_PROCFS_DEBUG */
892
893 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
894 if (ap->proc != NULL) {
895 remove_proc_entry("ap", ap->proc);
896 remove_proc_entry("ap_control", ap->proc);
897 }
898 ap_control_flush_macs(&ap->mac_restrictions);
899 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
900
901 ap->initialized = 0;
902 }
903
904
905 /* caller should have mutex for AP STA list handling */
906 static struct sta_info* ap_get_sta(struct ap_data *ap, u8 *sta)
907 {
908 struct sta_info *s;
909
910 s = ap->sta_hash[STA_HASH(sta)];
911 while (s != NULL && memcmp(s->addr, sta, ETH_ALEN) != 0)
912 s = s->hnext;
913 return s;
914 }
915
916
917 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
918
919 /* Called from timer handler and from scheduled AP queue handlers */
920 static void prism2_send_mgmt(struct net_device *dev,
921 u16 type_subtype, char *body,
922 int body_len, u8 *addr, u16 tx_cb_idx)
923 {
924 struct hostap_interface *iface;
925 local_info_t *local;
926 struct ieee80211_hdr_4addr *hdr;
927 u16 fc;
928 struct sk_buff *skb;
929 struct hostap_skb_tx_data *meta;
930 int hdrlen;
931
932 iface = netdev_priv(dev);
933 local = iface->local;
934 dev = local->dev; /* always use master radio device */
935 iface = netdev_priv(dev);
936
937 if (!(dev->flags & IFF_UP)) {
938 PDEBUG(DEBUG_AP, "%s: prism2_send_mgmt - device is not UP - "
939 "cannot send frame\n", dev->name);
940 return;
941 }
942
943 skb = dev_alloc_skb(sizeof(*hdr) + body_len);
944 if (skb == NULL) {
945 PDEBUG(DEBUG_AP, "%s: prism2_send_mgmt failed to allocate "
946 "skb\n", dev->name);
947 return;
948 }
949
950 fc = type_subtype;
951 hdrlen = hostap_80211_get_hdrlen(fc);
952 hdr = (struct ieee80211_hdr_4addr *) skb_put(skb, hdrlen);
953 if (body)
954 memcpy(skb_put(skb, body_len), body, body_len);
955
956 memset(hdr, 0, hdrlen);
957
958 /* FIX: ctrl::ack sending used special HFA384X_TX_CTRL_802_11
959 * tx_control instead of using local->tx_control */
960
961
962 memcpy(hdr->addr1, addr, ETH_ALEN); /* DA / RA */
963 if (WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_DATA) {
964 fc |= IEEE80211_FCTL_FROMDS;
965 memcpy(hdr->addr2, dev->dev_addr, ETH_ALEN); /* BSSID */
966 memcpy(hdr->addr3, dev->dev_addr, ETH_ALEN); /* SA */
967 } else if (WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_CTL) {
968 /* control:ACK does not have addr2 or addr3 */
969 memset(hdr->addr2, 0, ETH_ALEN);
970 memset(hdr->addr3, 0, ETH_ALEN);
971 } else {
972 memcpy(hdr->addr2, dev->dev_addr, ETH_ALEN); /* SA */
973 memcpy(hdr->addr3, dev->dev_addr, ETH_ALEN); /* BSSID */
974 }
975
976 hdr->frame_ctl = cpu_to_le16(fc);
977
978 meta = (struct hostap_skb_tx_data *) skb->cb;
979 memset(meta, 0, sizeof(*meta));
980 meta->magic = HOSTAP_SKB_TX_DATA_MAGIC;
981 meta->iface = iface;
982 meta->tx_cb_idx = tx_cb_idx;
983
984 skb->dev = dev;
985 skb->mac.raw = skb->nh.raw = skb->data;
986 dev_queue_xmit(skb);
987 }
988 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
989
990
991 static int prism2_sta_proc_read(char *page, char **start, off_t off,
992 int count, int *eof, void *data)
993 {
994 char *p = page;
995 struct sta_info *sta = (struct sta_info *) data;
996 int i;
997
998 /* FIX: possible race condition.. the STA data could have just expired,
999 * but proc entry was still here so that the read could have started;
1000 * some locking should be done here.. */
1001
1002 if (off != 0) {
1003 *eof = 1;
1004 return 0;
1005 }
1006
1007 p += sprintf(p, "%s=" MACSTR "\nusers=%d\naid=%d\n"
1008 "flags=0x%04x%s%s%s%s%s%s%s\n"
1009 "capability=0x%02x\nlisten_interval=%d\nsupported_rates=",
1010 sta->ap ? "AP" : "STA",
1011 MAC2STR(sta->addr), atomic_read(&sta->users), sta->aid,
1012 sta->flags,
1013 sta->flags & WLAN_STA_AUTH ? " AUTH" : "",
1014 sta->flags & WLAN_STA_ASSOC ? " ASSOC" : "",
1015 sta->flags & WLAN_STA_PS ? " PS" : "",
1016 sta->flags & WLAN_STA_TIM ? " TIM" : "",
1017 sta->flags & WLAN_STA_PERM ? " PERM" : "",
1018 sta->flags & WLAN_STA_AUTHORIZED ? " AUTHORIZED" : "",
1019 sta->flags & WLAN_STA_PENDING_POLL ? " POLL" : "",
1020 sta->capability, sta->listen_interval);
1021 /* supported_rates: 500 kbit/s units with msb ignored */
1022 for (i = 0; i < sizeof(sta->supported_rates); i++)
1023 if (sta->supported_rates[i] != 0)
1024 p += sprintf(p, "%d%sMbps ",
1025 (sta->supported_rates[i] & 0x7f) / 2,
1026 sta->supported_rates[i] & 1 ? ".5" : "");
1027 p += sprintf(p, "\njiffies=%lu\nlast_auth=%lu\nlast_assoc=%lu\n"
1028 "last_rx=%lu\nlast_tx=%lu\nrx_packets=%lu\n"
1029 "tx_packets=%lu\n"
1030 "rx_bytes=%lu\ntx_bytes=%lu\nbuffer_count=%d\n"
1031 "last_rx: silence=%d dBm signal=%d dBm rate=%d%s Mbps\n"
1032 "tx_rate=%d\ntx[1M]=%d\ntx[2M]=%d\ntx[5.5M]=%d\n"
1033 "tx[11M]=%d\n"
1034 "rx[1M]=%d\nrx[2M]=%d\nrx[5.5M]=%d\nrx[11M]=%d\n",
1035 jiffies, sta->last_auth, sta->last_assoc, sta->last_rx,
1036 sta->last_tx,
1037 sta->rx_packets, sta->tx_packets, sta->rx_bytes,
1038 sta->tx_bytes, skb_queue_len(&sta->tx_buf),
1039 sta->last_rx_silence,
1040 sta->last_rx_signal, sta->last_rx_rate / 10,
1041 sta->last_rx_rate % 10 ? ".5" : "",
1042 sta->tx_rate, sta->tx_count[0], sta->tx_count[1],
1043 sta->tx_count[2], sta->tx_count[3], sta->rx_count[0],
1044 sta->rx_count[1], sta->rx_count[2], sta->rx_count[3]);
1045 if (sta->crypt && sta->crypt->ops && sta->crypt->ops->print_stats)
1046 p = sta->crypt->ops->print_stats(p, sta->crypt->priv);
1047 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1048 if (sta->ap) {
1049 if (sta->u.ap.channel >= 0)
1050 p += sprintf(p, "channel=%d\n", sta->u.ap.channel);
1051 p += sprintf(p, "ssid=");
1052 for (i = 0; i < sta->u.ap.ssid_len; i++)
1053 p += sprintf(p, ((sta->u.ap.ssid[i] >= 32 &&
1054 sta->u.ap.ssid[i] < 127) ?
1055 "%c" : "<%02x>"),
1056 sta->u.ap.ssid[i]);
1057 p += sprintf(p, "\n");
1058 }
1059 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1060
1061 return (p - page);
1062 }
1063
1064
1065 static void handle_add_proc_queue(void *data)
1066 {
1067 struct ap_data *ap = (struct ap_data *) data;
1068 struct sta_info *sta;
1069 char name[20];
1070 struct add_sta_proc_data *entry, *prev;
1071
1072 entry = ap->add_sta_proc_entries;
1073 ap->add_sta_proc_entries = NULL;
1074
1075 while (entry) {
1076 spin_lock_bh(&ap->sta_table_lock);
1077 sta = ap_get_sta(ap, entry->addr);
1078 if (sta)
1079 atomic_inc(&sta->users);
1080 spin_unlock_bh(&ap->sta_table_lock);
1081
1082 if (sta) {
1083 sprintf(name, MACSTR, MAC2STR(sta->addr));
1084 sta->proc = create_proc_read_entry(
1085 name, 0, ap->proc,
1086 prism2_sta_proc_read, sta);
1087
1088 atomic_dec(&sta->users);
1089 }
1090
1091 prev = entry;
1092 entry = entry->next;
1093 kfree(prev);
1094 }
1095 }
1096
1097
1098 static struct sta_info * ap_add_sta(struct ap_data *ap, u8 *addr)
1099 {
1100 struct sta_info *sta;
1101
1102 sta = (struct sta_info *)
1103 kmalloc(sizeof(struct sta_info), GFP_ATOMIC);
1104 if (sta == NULL) {
1105 PDEBUG(DEBUG_AP, "AP: kmalloc failed\n");
1106 return NULL;
1107 }
1108
1109 /* initialize STA info data */
1110 memset(sta, 0, sizeof(struct sta_info));
1111 sta->local = ap->local;
1112 skb_queue_head_init(&sta->tx_buf);
1113 memcpy(sta->addr, addr, ETH_ALEN);
1114
1115 atomic_inc(&sta->users);
1116 spin_lock_bh(&ap->sta_table_lock);
1117 list_add(&sta->list, &ap->sta_list);
1118 ap->num_sta++;
1119 ap_sta_hash_add(ap, sta);
1120 spin_unlock_bh(&ap->sta_table_lock);
1121
1122 if (ap->proc) {
1123 struct add_sta_proc_data *entry;
1124 /* schedule a non-interrupt context process to add a procfs
1125 * entry for the STA since procfs code use GFP_KERNEL */
1126 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
1127 if (entry) {
1128 memcpy(entry->addr, sta->addr, ETH_ALEN);
1129 entry->next = ap->add_sta_proc_entries;
1130 ap->add_sta_proc_entries = entry;
1131 schedule_work(&ap->add_sta_proc_queue);
1132 } else
1133 printk(KERN_DEBUG "Failed to add STA proc data\n");
1134 }
1135
1136 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1137 init_timer(&sta->timer);
1138 sta->timer.expires = jiffies + ap->max_inactivity;
1139 sta->timer.data = (unsigned long) sta;
1140 sta->timer.function = ap_handle_timer;
1141 if (!ap->local->hostapd)
1142 add_timer(&sta->timer);
1143 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1144
1145 return sta;
1146 }
1147
1148
1149 static int ap_tx_rate_ok(int rateidx, struct sta_info *sta,
1150 local_info_t *local)
1151 {
1152 if (rateidx > sta->tx_max_rate ||
1153 !(sta->tx_supp_rates & (1 << rateidx)))
1154 return 0;
1155
1156 if (local->tx_rate_control != 0 &&
1157 !(local->tx_rate_control & (1 << rateidx)))
1158 return 0;
1159
1160 return 1;
1161 }
1162
1163
1164 static void prism2_check_tx_rates(struct sta_info *sta)
1165 {
1166 int i;
1167
1168 sta->tx_supp_rates = 0;
1169 for (i = 0; i < sizeof(sta->supported_rates); i++) {
1170 if ((sta->supported_rates[i] & 0x7f) == 2)
1171 sta->tx_supp_rates |= WLAN_RATE_1M;
1172 if ((sta->supported_rates[i] & 0x7f) == 4)
1173 sta->tx_supp_rates |= WLAN_RATE_2M;
1174 if ((sta->supported_rates[i] & 0x7f) == 11)
1175 sta->tx_supp_rates |= WLAN_RATE_5M5;
1176 if ((sta->supported_rates[i] & 0x7f) == 22)
1177 sta->tx_supp_rates |= WLAN_RATE_11M;
1178 }
1179 sta->tx_max_rate = sta->tx_rate = sta->tx_rate_idx = 0;
1180 if (sta->tx_supp_rates & WLAN_RATE_1M) {
1181 sta->tx_max_rate = 0;
1182 if (ap_tx_rate_ok(0, sta, sta->local)) {
1183 sta->tx_rate = 10;
1184 sta->tx_rate_idx = 0;
1185 }
1186 }
1187 if (sta->tx_supp_rates & WLAN_RATE_2M) {
1188 sta->tx_max_rate = 1;
1189 if (ap_tx_rate_ok(1, sta, sta->local)) {
1190 sta->tx_rate = 20;
1191 sta->tx_rate_idx = 1;
1192 }
1193 }
1194 if (sta->tx_supp_rates & WLAN_RATE_5M5) {
1195 sta->tx_max_rate = 2;
1196 if (ap_tx_rate_ok(2, sta, sta->local)) {
1197 sta->tx_rate = 55;
1198 sta->tx_rate_idx = 2;
1199 }
1200 }
1201 if (sta->tx_supp_rates & WLAN_RATE_11M) {
1202 sta->tx_max_rate = 3;
1203 if (ap_tx_rate_ok(3, sta, sta->local)) {
1204 sta->tx_rate = 110;
1205 sta->tx_rate_idx = 3;
1206 }
1207 }
1208 }
1209
1210
1211 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1212
1213 static void ap_crypt_init(struct ap_data *ap)
1214 {
1215 ap->crypt = ieee80211_get_crypto_ops("WEP");
1216
1217 if (ap->crypt) {
1218 if (ap->crypt->init) {
1219 ap->crypt_priv = ap->crypt->init(0);
1220 if (ap->crypt_priv == NULL)
1221 ap->crypt = NULL;
1222 else {
1223 u8 key[WEP_KEY_LEN];
1224 get_random_bytes(key, WEP_KEY_LEN);
1225 ap->crypt->set_key(key, WEP_KEY_LEN, NULL,
1226 ap->crypt_priv);
1227 }
1228 }
1229 }
1230
1231 if (ap->crypt == NULL) {
1232 printk(KERN_WARNING "AP could not initialize WEP: load module "
1233 "ieee80211_crypt_wep.ko\n");
1234 }
1235 }
1236
1237
1238 /* Generate challenge data for shared key authentication. IEEE 802.11 specifies
1239 * that WEP algorithm is used for generating challange. This should be unique,
1240 * but otherwise there is not really need for randomness etc. Initialize WEP
1241 * with pseudo random key and then use increasing IV to get unique challenge
1242 * streams.
1243 *
1244 * Called only as a scheduled task for pending AP frames.
1245 */
1246 static char * ap_auth_make_challenge(struct ap_data *ap)
1247 {
1248 char *tmpbuf;
1249 struct sk_buff *skb;
1250
1251 if (ap->crypt == NULL) {
1252 ap_crypt_init(ap);
1253 if (ap->crypt == NULL)
1254 return NULL;
1255 }
1256
1257 tmpbuf = (char *) kmalloc(WLAN_AUTH_CHALLENGE_LEN, GFP_ATOMIC);
1258 if (tmpbuf == NULL) {
1259 PDEBUG(DEBUG_AP, "AP: kmalloc failed for challenge\n");
1260 return NULL;
1261 }
1262
1263 skb = dev_alloc_skb(WLAN_AUTH_CHALLENGE_LEN +
1264 ap->crypt->extra_mpdu_prefix_len +
1265 ap->crypt->extra_mpdu_postfix_len);
1266 if (skb == NULL) {
1267 kfree(tmpbuf);
1268 return NULL;
1269 }
1270
1271 skb_reserve(skb, ap->crypt->extra_mpdu_prefix_len);
1272 memset(skb_put(skb, WLAN_AUTH_CHALLENGE_LEN), 0,
1273 WLAN_AUTH_CHALLENGE_LEN);
1274 if (ap->crypt->encrypt_mpdu(skb, 0, ap->crypt_priv)) {
1275 dev_kfree_skb(skb);
1276 kfree(tmpbuf);
1277 return NULL;
1278 }
1279
1280 memcpy(tmpbuf, skb->data + ap->crypt->extra_mpdu_prefix_len,
1281 WLAN_AUTH_CHALLENGE_LEN);
1282 dev_kfree_skb(skb);
1283
1284 return tmpbuf;
1285 }
1286
1287
1288 /* Called only as a scheduled task for pending AP frames. */
1289 static void handle_authen(local_info_t *local, struct sk_buff *skb,
1290 struct hostap_80211_rx_status *rx_stats)
1291 {
1292 struct net_device *dev = local->dev;
1293 struct ieee80211_hdr_4addr *hdr = (struct ieee80211_hdr_4addr *) skb->data;
1294 size_t hdrlen;
1295 struct ap_data *ap = local->ap;
1296 char body[8 + WLAN_AUTH_CHALLENGE_LEN], *challenge = NULL;
1297 int len, olen;
1298 u16 auth_alg, auth_transaction, status_code, *pos;
1299 u16 resp = WLAN_STATUS_SUCCESS, fc;
1300 struct sta_info *sta = NULL;
1301 struct ieee80211_crypt_data *crypt;
1302 char *txt = "";
1303
1304 len = skb->len - IEEE80211_MGMT_HDR_LEN;
1305
1306 fc = le16_to_cpu(hdr->frame_ctl);
1307 hdrlen = hostap_80211_get_hdrlen(fc);
1308
1309 if (len < 6) {
1310 PDEBUG(DEBUG_AP, "%s: handle_authen - too short payload "
1311 "(len=%d) from " MACSTR "\n", dev->name, len,
1312 MAC2STR(hdr->addr2));
1313 return;
1314 }
1315
1316 spin_lock_bh(&local->ap->sta_table_lock);
1317 sta = ap_get_sta(local->ap, hdr->addr2);
1318 if (sta)
1319 atomic_inc(&sta->users);
1320 spin_unlock_bh(&local->ap->sta_table_lock);
1321
1322 if (sta && sta->crypt)
1323 crypt = sta->crypt;
1324 else {
1325 int idx = 0;
1326 if (skb->len >= hdrlen + 3)
1327 idx = skb->data[hdrlen + 3] >> 6;
1328 crypt = local->crypt[idx];
1329 }
1330
1331 pos = (u16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
1332 auth_alg = __le16_to_cpu(*pos);
1333 pos++;
1334 auth_transaction = __le16_to_cpu(*pos);
1335 pos++;
1336 status_code = __le16_to_cpu(*pos);
1337 pos++;
1338
1339 if (memcmp(dev->dev_addr, hdr->addr2, ETH_ALEN) == 0 ||
1340 ap_control_mac_deny(&ap->mac_restrictions, hdr->addr2)) {
1341 txt = "authentication denied";
1342 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1343 goto fail;
1344 }
1345
1346 if (((local->auth_algs & PRISM2_AUTH_OPEN) &&
1347 auth_alg == WLAN_AUTH_OPEN) ||
1348 ((local->auth_algs & PRISM2_AUTH_SHARED_KEY) &&
1349 crypt && auth_alg == WLAN_AUTH_SHARED_KEY)) {
1350 } else {
1351 txt = "unsupported algorithm";
1352 resp = WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG;
1353 goto fail;
1354 }
1355
1356 if (len >= 8) {
1357 u8 *u = (u8 *) pos;
1358 if (*u == WLAN_EID_CHALLENGE) {
1359 if (*(u + 1) != WLAN_AUTH_CHALLENGE_LEN) {
1360 txt = "invalid challenge len";
1361 resp = WLAN_STATUS_CHALLENGE_FAIL;
1362 goto fail;
1363 }
1364 if (len - 8 < WLAN_AUTH_CHALLENGE_LEN) {
1365 txt = "challenge underflow";
1366 resp = WLAN_STATUS_CHALLENGE_FAIL;
1367 goto fail;
1368 }
1369 challenge = (char *) (u + 2);
1370 }
1371 }
1372
1373 if (sta && sta->ap) {
1374 if (time_after(jiffies, sta->u.ap.last_beacon +
1375 (10 * sta->listen_interval * HZ) / 1024)) {
1376 PDEBUG(DEBUG_AP, "%s: no beacons received for a while,"
1377 " assuming AP " MACSTR " is now STA\n",
1378 dev->name, MAC2STR(sta->addr));
1379 sta->ap = 0;
1380 sta->flags = 0;
1381 sta->u.sta.challenge = NULL;
1382 } else {
1383 txt = "AP trying to authenticate?";
1384 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1385 goto fail;
1386 }
1387 }
1388
1389 if ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 1) ||
1390 (auth_alg == WLAN_AUTH_SHARED_KEY &&
1391 (auth_transaction == 1 ||
1392 (auth_transaction == 3 && sta != NULL &&
1393 sta->u.sta.challenge != NULL)))) {
1394 } else {
1395 txt = "unknown authentication transaction number";
1396 resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION;
1397 goto fail;
1398 }
1399
1400 if (sta == NULL) {
1401 txt = "new STA";
1402
1403 if (local->ap->num_sta >= MAX_STA_COUNT) {
1404 /* FIX: might try to remove some old STAs first? */
1405 txt = "no more room for new STAs";
1406 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1407 goto fail;
1408 }
1409
1410 sta = ap_add_sta(local->ap, hdr->addr2);
1411 if (sta == NULL) {
1412 txt = "ap_add_sta failed";
1413 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1414 goto fail;
1415 }
1416 }
1417
1418 switch (auth_alg) {
1419 case WLAN_AUTH_OPEN:
1420 txt = "authOK";
1421 /* IEEE 802.11 standard is not completely clear about
1422 * whether STA is considered authenticated after
1423 * authentication OK frame has been send or after it
1424 * has been ACKed. In order to reduce interoperability
1425 * issues, mark the STA authenticated before ACK. */
1426 sta->flags |= WLAN_STA_AUTH;
1427 break;
1428
1429 case WLAN_AUTH_SHARED_KEY:
1430 if (auth_transaction == 1) {
1431 if (sta->u.sta.challenge == NULL) {
1432 sta->u.sta.challenge =
1433 ap_auth_make_challenge(local->ap);
1434 if (sta->u.sta.challenge == NULL) {
1435 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1436 goto fail;
1437 }
1438 }
1439 } else {
1440 if (sta->u.sta.challenge == NULL ||
1441 challenge == NULL ||
1442 memcmp(sta->u.sta.challenge, challenge,
1443 WLAN_AUTH_CHALLENGE_LEN) != 0 ||
1444 !(fc & IEEE80211_FCTL_PROTECTED)) {
1445 txt = "challenge response incorrect";
1446 resp = WLAN_STATUS_CHALLENGE_FAIL;
1447 goto fail;
1448 }
1449
1450 txt = "challenge OK - authOK";
1451 /* IEEE 802.11 standard is not completely clear about
1452 * whether STA is considered authenticated after
1453 * authentication OK frame has been send or after it
1454 * has been ACKed. In order to reduce interoperability
1455 * issues, mark the STA authenticated before ACK. */
1456 sta->flags |= WLAN_STA_AUTH;
1457 kfree(sta->u.sta.challenge);
1458 sta->u.sta.challenge = NULL;
1459 }
1460 break;
1461 }
1462
1463 fail:
1464 pos = (u16 *) body;
1465 *pos = cpu_to_le16(auth_alg);
1466 pos++;
1467 *pos = cpu_to_le16(auth_transaction + 1);
1468 pos++;
1469 *pos = cpu_to_le16(resp); /* status_code */
1470 pos++;
1471 olen = 6;
1472
1473 if (resp == WLAN_STATUS_SUCCESS && sta != NULL &&
1474 sta->u.sta.challenge != NULL &&
1475 auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 1) {
1476 u8 *tmp = (u8 *) pos;
1477 *tmp++ = WLAN_EID_CHALLENGE;
1478 *tmp++ = WLAN_AUTH_CHALLENGE_LEN;
1479 pos++;
1480 memcpy(pos, sta->u.sta.challenge, WLAN_AUTH_CHALLENGE_LEN);
1481 olen += 2 + WLAN_AUTH_CHALLENGE_LEN;
1482 }
1483
1484 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_AUTH,
1485 body, olen, hdr->addr2, ap->tx_callback_auth);
1486
1487 if (sta) {
1488 sta->last_rx = jiffies;
1489 atomic_dec(&sta->users);
1490 }
1491
1492 if (resp) {
1493 PDEBUG(DEBUG_AP, "%s: " MACSTR " auth (alg=%d trans#=%d "
1494 "stat=%d len=%d fc=%04x) ==> %d (%s)\n",
1495 dev->name, MAC2STR(hdr->addr2), auth_alg,
1496 auth_transaction, status_code, len, fc, resp, txt);
1497 }
1498 }
1499
1500
1501 /* Called only as a scheduled task for pending AP frames. */
1502 static void handle_assoc(local_info_t *local, struct sk_buff *skb,
1503 struct hostap_80211_rx_status *rx_stats, int reassoc)
1504 {
1505 struct net_device *dev = local->dev;
1506 struct ieee80211_hdr_4addr *hdr = (struct ieee80211_hdr_4addr *) skb->data;
1507 char body[12], *p, *lpos;
1508 int len, left;
1509 u16 *pos;
1510 u16 resp = WLAN_STATUS_SUCCESS;
1511 struct sta_info *sta = NULL;
1512 int send_deauth = 0;
1513 char *txt = "";
1514 u8 prev_ap[ETH_ALEN];
1515
1516 left = len = skb->len - IEEE80211_MGMT_HDR_LEN;
1517
1518 if (len < (reassoc ? 10 : 4)) {
1519 PDEBUG(DEBUG_AP, "%s: handle_assoc - too short payload "
1520 "(len=%d, reassoc=%d) from " MACSTR "\n",
1521 dev->name, len, reassoc, MAC2STR(hdr->addr2));
1522 return;
1523 }
1524
1525 spin_lock_bh(&local->ap->sta_table_lock);
1526 sta = ap_get_sta(local->ap, hdr->addr2);
1527 if (sta == NULL || (sta->flags & WLAN_STA_AUTH) == 0) {
1528 spin_unlock_bh(&local->ap->sta_table_lock);
1529 txt = "trying to associate before authentication";
1530 send_deauth = 1;
1531 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1532 sta = NULL; /* do not decrement sta->users */
1533 goto fail;
1534 }
1535 atomic_inc(&sta->users);
1536 spin_unlock_bh(&local->ap->sta_table_lock);
1537
1538 pos = (u16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
1539 sta->capability = __le16_to_cpu(*pos);
1540 pos++; left -= 2;
1541 sta->listen_interval = __le16_to_cpu(*pos);
1542 pos++; left -= 2;
1543
1544 if (reassoc) {
1545 memcpy(prev_ap, pos, ETH_ALEN);
1546 pos++; pos++; pos++; left -= 6;
1547 } else
1548 memset(prev_ap, 0, ETH_ALEN);
1549
1550 if (left >= 2) {
1551 unsigned int ileft;
1552 unsigned char *u = (unsigned char *) pos;
1553
1554 if (*u == WLAN_EID_SSID) {
1555 u++; left--;
1556 ileft = *u;
1557 u++; left--;
1558
1559 if (ileft > left || ileft > MAX_SSID_LEN) {
1560 txt = "SSID overflow";
1561 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1562 goto fail;
1563 }
1564
1565 if (ileft != strlen(local->essid) ||
1566 memcmp(local->essid, u, ileft) != 0) {
1567 txt = "not our SSID";
1568 resp = WLAN_STATUS_ASSOC_DENIED_UNSPEC;
1569 goto fail;
1570 }
1571
1572 u += ileft;
1573 left -= ileft;
1574 }
1575
1576 if (left >= 2 && *u == WLAN_EID_SUPP_RATES) {
1577 u++; left--;
1578 ileft = *u;
1579 u++; left--;
1580
1581 if (ileft > left || ileft == 0 ||
1582 ileft > WLAN_SUPP_RATES_MAX) {
1583 txt = "SUPP_RATES len error";
1584 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1585 goto fail;
1586 }
1587
1588 memset(sta->supported_rates, 0,
1589 sizeof(sta->supported_rates));
1590 memcpy(sta->supported_rates, u, ileft);
1591 prism2_check_tx_rates(sta);
1592
1593 u += ileft;
1594 left -= ileft;
1595 }
1596
1597 if (left > 0) {
1598 PDEBUG(DEBUG_AP, "%s: assoc from " MACSTR " with extra"
1599 " data (%d bytes) [",
1600 dev->name, MAC2STR(hdr->addr2), left);
1601 while (left > 0) {
1602 PDEBUG2(DEBUG_AP, "<%02x>", *u);
1603 u++; left--;
1604 }
1605 PDEBUG2(DEBUG_AP, "]\n");
1606 }
1607 } else {
1608 txt = "frame underflow";
1609 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1610 goto fail;
1611 }
1612
1613 /* get a unique AID */
1614 if (sta->aid > 0)
1615 txt = "OK, old AID";
1616 else {
1617 spin_lock_bh(&local->ap->sta_table_lock);
1618 for (sta->aid = 1; sta->aid <= MAX_AID_TABLE_SIZE; sta->aid++)
1619 if (local->ap->sta_aid[sta->aid - 1] == NULL)
1620 break;
1621 if (sta->aid > MAX_AID_TABLE_SIZE) {
1622 sta->aid = 0;
1623 spin_unlock_bh(&local->ap->sta_table_lock);
1624 resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
1625 txt = "no room for more AIDs";
1626 } else {
1627 local->ap->sta_aid[sta->aid - 1] = sta;
1628 spin_unlock_bh(&local->ap->sta_table_lock);
1629 txt = "OK, new AID";
1630 }
1631 }
1632
1633 fail:
1634 pos = (u16 *) body;
1635
1636 if (send_deauth) {
1637 *pos = __constant_cpu_to_le16(
1638 WLAN_REASON_STA_REQ_ASSOC_WITHOUT_AUTH);
1639 pos++;
1640 } else {
1641 /* FIX: CF-Pollable and CF-PollReq should be set to match the
1642 * values in beacons/probe responses */
1643 /* FIX: how about privacy and WEP? */
1644 /* capability */
1645 *pos = __constant_cpu_to_le16(WLAN_CAPABILITY_ESS);
1646 pos++;
1647
1648 /* status_code */
1649 *pos = __cpu_to_le16(resp);
1650 pos++;
1651
1652 *pos = __cpu_to_le16((sta && sta->aid > 0 ? sta->aid : 0) |
1653 BIT(14) | BIT(15)); /* AID */
1654 pos++;
1655
1656 /* Supported rates (Information element) */
1657 p = (char *) pos;
1658 *p++ = WLAN_EID_SUPP_RATES;
1659 lpos = p;
1660 *p++ = 0; /* len */
1661 if (local->tx_rate_control & WLAN_RATE_1M) {
1662 *p++ = local->basic_rates & WLAN_RATE_1M ? 0x82 : 0x02;
1663 (*lpos)++;
1664 }
1665 if (local->tx_rate_control & WLAN_RATE_2M) {
1666 *p++ = local->basic_rates & WLAN_RATE_2M ? 0x84 : 0x04;
1667 (*lpos)++;
1668 }
1669 if (local->tx_rate_control & WLAN_RATE_5M5) {
1670 *p++ = local->basic_rates & WLAN_RATE_5M5 ?
1671 0x8b : 0x0b;
1672 (*lpos)++;
1673 }
1674 if (local->tx_rate_control & WLAN_RATE_11M) {
1675 *p++ = local->basic_rates & WLAN_RATE_11M ?
1676 0x96 : 0x16;
1677 (*lpos)++;
1678 }
1679 pos = (u16 *) p;
1680 }
1681
1682 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT |
1683 (send_deauth ? IEEE80211_STYPE_DEAUTH :
1684 (reassoc ? IEEE80211_STYPE_REASSOC_RESP :
1685 IEEE80211_STYPE_ASSOC_RESP)),
1686 body, (u8 *) pos - (u8 *) body,
1687 hdr->addr2,
1688 send_deauth ? 0 : local->ap->tx_callback_assoc);
1689
1690 if (sta) {
1691 if (resp == WLAN_STATUS_SUCCESS) {
1692 sta->last_rx = jiffies;
1693 /* STA will be marked associated from TX callback, if
1694 * AssocResp is ACKed */
1695 }
1696 atomic_dec(&sta->users);
1697 }
1698
1699 #if 0
1700 PDEBUG(DEBUG_AP, "%s: " MACSTR " %sassoc (len=%d prev_ap=" MACSTR
1701 ") => %d(%d) (%s)\n",
1702 dev->name, MAC2STR(hdr->addr2), reassoc ? "re" : "", len,
1703 MAC2STR(prev_ap), resp, send_deauth, txt);
1704 #endif
1705 }
1706
1707
1708 /* Called only as a scheduled task for pending AP frames. */
1709 static void handle_deauth(local_info_t *local, struct sk_buff *skb,
1710 struct hostap_80211_rx_status *rx_stats)
1711 {
1712 struct net_device *dev = local->dev;
1713 struct ieee80211_hdr_4addr *hdr = (struct ieee80211_hdr_4addr *) skb->data;
1714 char *body = (char *) (skb->data + IEEE80211_MGMT_HDR_LEN);
1715 int len;
1716 u16 reason_code, *pos;
1717 struct sta_info *sta = NULL;
1718
1719 len = skb->len - IEEE80211_MGMT_HDR_LEN;
1720
1721 if (len < 2) {
1722 printk("handle_deauth - too short payload (len=%d)\n", len);
1723 return;
1724 }
1725
1726 pos = (u16 *) body;
1727 reason_code = __le16_to_cpu(*pos);
1728
1729 PDEBUG(DEBUG_AP, "%s: deauthentication: " MACSTR " len=%d, "
1730 "reason_code=%d\n", dev->name, MAC2STR(hdr->addr2), len,
1731 reason_code);
1732
1733 spin_lock_bh(&local->ap->sta_table_lock);
1734 sta = ap_get_sta(local->ap, hdr->addr2);
1735 if (sta != NULL) {
1736 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap)
1737 hostap_event_expired_sta(local->dev, sta);
1738 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
1739 }
1740 spin_unlock_bh(&local->ap->sta_table_lock);
1741 if (sta == NULL) {
1742 printk("%s: deauthentication from " MACSTR ", "
1743 "reason_code=%d, but STA not authenticated\n", dev->name,
1744 MAC2STR(hdr->addr2), reason_code);
1745 }
1746 }
1747
1748
1749 /* Called only as a scheduled task for pending AP frames. */
1750 static void handle_disassoc(local_info_t *local, struct sk_buff *skb,
1751 struct hostap_80211_rx_status *rx_stats)
1752 {
1753 struct net_device *dev = local->dev;
1754 struct ieee80211_hdr_4addr *hdr = (struct ieee80211_hdr_4addr *) skb->data;
1755 char *body = skb->data + IEEE80211_MGMT_HDR_LEN;
1756 int len;
1757 u16 reason_code, *pos;
1758 struct sta_info *sta = NULL;
1759
1760 len = skb->len - IEEE80211_MGMT_HDR_LEN;
1761
1762 if (len < 2) {
1763 printk("handle_disassoc - too short payload (len=%d)\n", len);
1764 return;
1765 }
1766
1767 pos = (u16 *) body;
1768 reason_code = __le16_to_cpu(*pos);
1769
1770 PDEBUG(DEBUG_AP, "%s: disassociation: " MACSTR " len=%d, "
1771 "reason_code=%d\n", dev->name, MAC2STR(hdr->addr2), len,
1772 reason_code);
1773
1774 spin_lock_bh(&local->ap->sta_table_lock);
1775 sta = ap_get_sta(local->ap, hdr->addr2);
1776 if (sta != NULL) {
1777 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap)
1778 hostap_event_expired_sta(local->dev, sta);
1779 sta->flags &= ~WLAN_STA_ASSOC;
1780 }
1781 spin_unlock_bh(&local->ap->sta_table_lock);
1782 if (sta == NULL) {
1783 printk("%s: disassociation from " MACSTR ", "
1784 "reason_code=%d, but STA not authenticated\n",
1785 dev->name, MAC2STR(hdr->addr2), reason_code);
1786 }
1787 }
1788
1789
1790 /* Called only as a scheduled task for pending AP frames. */
1791 static void ap_handle_data_nullfunc(local_info_t *local,
1792 struct ieee80211_hdr_4addr *hdr)
1793 {
1794 struct net_device *dev = local->dev;
1795
1796 /* some STA f/w's seem to require control::ACK frame for
1797 * data::nullfunc, but at least Prism2 station f/w version 0.8.0 does
1798 * not send this..
1799 * send control::ACK for the data::nullfunc */
1800
1801 printk(KERN_DEBUG "Sending control::ACK for data::nullfunc\n");
1802 prism2_send_mgmt(dev, IEEE80211_FTYPE_CTL | IEEE80211_STYPE_ACK,
1803 NULL, 0, hdr->addr2, 0);
1804 }
1805
1806
1807 /* Called only as a scheduled task for pending AP frames. */
1808 static void ap_handle_dropped_data(local_info_t *local,
1809 struct ieee80211_hdr_4addr *hdr)
1810 {
1811 struct net_device *dev = local->dev;
1812 struct sta_info *sta;
1813 u16 reason;
1814
1815 spin_lock_bh(&local->ap->sta_table_lock);
1816 sta = ap_get_sta(local->ap, hdr->addr2);
1817 if (sta)
1818 atomic_inc(&sta->users);
1819 spin_unlock_bh(&local->ap->sta_table_lock);
1820
1821 if (sta != NULL && (sta->flags & WLAN_STA_ASSOC)) {
1822 PDEBUG(DEBUG_AP, "ap_handle_dropped_data: STA is now okay?\n");
1823 atomic_dec(&sta->users);
1824 return;
1825 }
1826
1827 reason = __constant_cpu_to_le16(
1828 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
1829 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT |
1830 ((sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) ?
1831 IEEE80211_STYPE_DEAUTH : IEEE80211_STYPE_DISASSOC),
1832 (char *) &reason, sizeof(reason), hdr->addr2, 0);
1833
1834 if (sta)
1835 atomic_dec(&sta->users);
1836 }
1837
1838 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1839
1840
1841 /* Called only as a scheduled task for pending AP frames. */
1842 static void pspoll_send_buffered(local_info_t *local, struct sta_info *sta,
1843 struct sk_buff *skb)
1844 {
1845 struct hostap_skb_tx_data *meta;
1846
1847 if (!(sta->flags & WLAN_STA_PS)) {
1848 /* Station has moved to non-PS mode, so send all buffered
1849 * frames using normal device queue. */
1850 dev_queue_xmit(skb);
1851 return;
1852 }
1853
1854 /* add a flag for hostap_handle_sta_tx() to know that this skb should
1855 * be passed through even though STA is using PS */
1856 meta = (struct hostap_skb_tx_data *) skb->cb;
1857 meta->flags |= HOSTAP_TX_FLAGS_BUFFERED_FRAME;
1858 if (!skb_queue_empty(&sta->tx_buf)) {
1859 /* indicate to STA that more frames follow */
1860 meta->flags |= HOSTAP_TX_FLAGS_ADD_MOREDATA;
1861 }
1862 dev_queue_xmit(skb);
1863 }
1864
1865
1866 /* Called only as a scheduled task for pending AP frames. */
1867 static void handle_pspoll(local_info_t *local,
1868 struct ieee80211_hdr_4addr *hdr,
1869 struct hostap_80211_rx_status *rx_stats)
1870 {
1871 struct net_device *dev = local->dev;
1872 struct sta_info *sta;
1873 u16 aid;
1874 struct sk_buff *skb;
1875
1876 PDEBUG(DEBUG_PS2, "handle_pspoll: BSSID=" MACSTR ", TA=" MACSTR
1877 " PWRMGT=%d\n",
1878 MAC2STR(hdr->addr1), MAC2STR(hdr->addr2),
1879 !!(le16_to_cpu(hdr->frame_ctl) & IEEE80211_FCTL_PM));
1880
1881 if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN)) {
1882 PDEBUG(DEBUG_AP, "handle_pspoll - addr1(BSSID)=" MACSTR
1883 " not own MAC\n", MAC2STR(hdr->addr1));
1884 return;
1885 }
1886
1887 aid = __le16_to_cpu(hdr->duration_id);
1888 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) {
1889 PDEBUG(DEBUG_PS, " PSPOLL and AID[15:14] not set\n");
1890 return;
1891 }
1892 aid &= ~BIT(15) & ~BIT(14);
1893 if (aid == 0 || aid > MAX_AID_TABLE_SIZE) {
1894 PDEBUG(DEBUG_PS, " invalid aid=%d\n", aid);
1895 return;
1896 }
1897 PDEBUG(DEBUG_PS2, " aid=%d\n", aid);
1898
1899 spin_lock_bh(&local->ap->sta_table_lock);
1900 sta = ap_get_sta(local->ap, hdr->addr2);
1901 if (sta)
1902 atomic_inc(&sta->users);
1903 spin_unlock_bh(&local->ap->sta_table_lock);
1904
1905 if (sta == NULL) {
1906 PDEBUG(DEBUG_PS, " STA not found\n");
1907 return;
1908 }
1909 if (sta->aid != aid) {
1910 PDEBUG(DEBUG_PS, " received aid=%i does not match with "
1911 "assoc.aid=%d\n", aid, sta->aid);
1912 return;
1913 }
1914
1915 /* FIX: todo:
1916 * - add timeout for buffering (clear aid in TIM vector if buffer timed
1917 * out (expiry time must be longer than ListenInterval for
1918 * the corresponding STA; "8802-11: 11.2.1.9 AP aging function"
1919 * - what to do, if buffered, pspolled, and sent frame is not ACKed by
1920 * sta; store buffer for later use and leave TIM aid bit set? use
1921 * TX event to check whether frame was ACKed?
1922 */
1923
1924 while ((skb = skb_dequeue(&sta->tx_buf)) != NULL) {
1925 /* send buffered frame .. */
1926 PDEBUG(DEBUG_PS2, "Sending buffered frame to STA after PS POLL"
1927 " (buffer_count=%d)\n", skb_queue_len(&sta->tx_buf));
1928
1929 pspoll_send_buffered(local, sta, skb);
1930
1931 if (sta->flags & WLAN_STA_PS) {
1932 /* send only one buffered packet per PS Poll */
1933 /* FIX: should ignore further PS Polls until the
1934 * buffered packet that was just sent is acknowledged
1935 * (Tx or TxExc event) */
1936 break;
1937 }
1938 }
1939
1940 if (skb_queue_empty(&sta->tx_buf)) {
1941 /* try to clear aid from TIM */
1942 if (!(sta->flags & WLAN_STA_TIM))
1943 PDEBUG(DEBUG_PS2, "Re-unsetting TIM for aid %d\n",
1944 aid);
1945 hostap_set_tim(local, aid, 0);
1946 sta->flags &= ~WLAN_STA_TIM;
1947 }
1948
1949 atomic_dec(&sta->users);
1950 }
1951
1952
1953 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1954
1955 static void handle_wds_oper_queue(void *data)
1956 {
1957 local_info_t *local = data;
1958 struct wds_oper_data *entry, *prev;
1959
1960 spin_lock_bh(&local->lock);
1961 entry = local->ap->wds_oper_entries;
1962 local->ap->wds_oper_entries = NULL;
1963 spin_unlock_bh(&local->lock);
1964
1965 while (entry) {
1966 PDEBUG(DEBUG_AP, "%s: %s automatic WDS connection "
1967 "to AP " MACSTR "\n",
1968 local->dev->name,
1969 entry->type == WDS_ADD ? "adding" : "removing",
1970 MAC2STR(entry->addr));
1971 if (entry->type == WDS_ADD)
1972 prism2_wds_add(local, entry->addr, 0);
1973 else if (entry->type == WDS_DEL)
1974 prism2_wds_del(local, entry->addr, 0, 1);
1975
1976 prev = entry;
1977 entry = entry->next;
1978 kfree(prev);
1979 }
1980 }
1981
1982
1983 /* Called only as a scheduled task for pending AP frames. */
1984 static void handle_beacon(local_info_t *local, struct sk_buff *skb,
1985 struct hostap_80211_rx_status *rx_stats)
1986 {
1987 struct ieee80211_hdr_4addr *hdr = (struct ieee80211_hdr_4addr *) skb->data;
1988 char *body = skb->data + IEEE80211_MGMT_HDR_LEN;
1989 int len, left;
1990 u16 *pos, beacon_int, capability;
1991 char *ssid = NULL;
1992 unsigned char *supp_rates = NULL;
1993 int ssid_len = 0, supp_rates_len = 0;
1994 struct sta_info *sta = NULL;
1995 int new_sta = 0, channel = -1;
1996
1997 len = skb->len - IEEE80211_MGMT_HDR_LEN;
1998
1999 if (len < 8 + 2 + 2) {
2000 printk(KERN_DEBUG "handle_beacon - too short payload "
2001 "(len=%d)\n", len);
2002 return;
2003 }
2004
2005 pos = (u16 *) body;
2006 left = len;
2007
2008 /* Timestamp (8 octets) */
2009 pos += 4; left -= 8;
2010 /* Beacon interval (2 octets) */
2011 beacon_int = __le16_to_cpu(*pos);
2012 pos++; left -= 2;
2013 /* Capability information (2 octets) */
2014 capability = __le16_to_cpu(*pos);
2015 pos++; left -= 2;
2016
2017 if (local->ap->ap_policy != AP_OTHER_AP_EVEN_IBSS &&
2018 capability & WLAN_CAPABILITY_IBSS)
2019 return;
2020
2021 if (left >= 2) {
2022 unsigned int ileft;
2023 unsigned char *u = (unsigned char *) pos;
2024
2025 if (*u == WLAN_EID_SSID) {
2026 u++; left--;
2027 ileft = *u;
2028 u++; left--;
2029
2030 if (ileft > left || ileft > MAX_SSID_LEN) {
2031 PDEBUG(DEBUG_AP, "SSID: overflow\n");
2032 return;
2033 }
2034
2035 if (local->ap->ap_policy == AP_OTHER_AP_SAME_SSID &&
2036 (ileft != strlen(local->essid) ||
2037 memcmp(local->essid, u, ileft) != 0)) {
2038 /* not our SSID */
2039 return;
2040 }
2041
2042 ssid = u;
2043 ssid_len = ileft;
2044
2045 u += ileft;
2046 left -= ileft;
2047 }
2048
2049 if (*u == WLAN_EID_SUPP_RATES) {
2050 u++; left--;
2051 ileft = *u;
2052 u++; left--;
2053
2054 if (ileft > left || ileft == 0 || ileft > 8) {
2055 PDEBUG(DEBUG_AP, " - SUPP_RATES len error\n");
2056 return;
2057 }
2058
2059 supp_rates = u;
2060 supp_rates_len = ileft;
2061
2062 u += ileft;
2063 left -= ileft;
2064 }
2065
2066 if (*u == WLAN_EID_DS_PARAMS) {
2067 u++; left--;
2068 ileft = *u;
2069 u++; left--;
2070
2071 if (ileft > left || ileft != 1) {
2072 PDEBUG(DEBUG_AP, " - DS_PARAMS len error\n");
2073 return;
2074 }
2075
2076 channel = *u;
2077
2078 u += ileft;
2079 left -= ileft;
2080 }
2081 }
2082
2083 spin_lock_bh(&local->ap->sta_table_lock);
2084 sta = ap_get_sta(local->ap, hdr->addr2);
2085 if (sta != NULL)
2086 atomic_inc(&sta->users);
2087 spin_unlock_bh(&local->ap->sta_table_lock);
2088
2089 if (sta == NULL) {
2090 /* add new AP */
2091 new_sta = 1;
2092 sta = ap_add_sta(local->ap, hdr->addr2);
2093 if (sta == NULL) {
2094 printk(KERN_INFO "prism2: kmalloc failed for AP "
2095 "data structure\n");
2096 return;
2097 }
2098 hostap_event_new_sta(local->dev, sta);
2099
2100 /* mark APs authentication and associated for pseudo ad-hoc
2101 * style communication */
2102 sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
2103
2104 if (local->ap->autom_ap_wds) {
2105 hostap_wds_link_oper(local, sta->addr, WDS_ADD);
2106 }
2107 }
2108
2109 sta->ap = 1;
2110 if (ssid) {
2111 sta->u.ap.ssid_len = ssid_len;
2112 memcpy(sta->u.ap.ssid, ssid, ssid_len);
2113 sta->u.ap.ssid[ssid_len] = '\0';
2114 } else {
2115 sta->u.ap.ssid_len = 0;
2116 sta->u.ap.ssid[0] = '\0';
2117 }
2118 sta->u.ap.channel = channel;
2119 sta->rx_packets++;
2120 sta->rx_bytes += len;
2121 sta->u.ap.last_beacon = sta->last_rx = jiffies;
2122 sta->capability = capability;
2123 sta->listen_interval = beacon_int;
2124
2125 atomic_dec(&sta->users);
2126
2127 if (new_sta) {
2128 memset(sta->supported_rates, 0, sizeof(sta->supported_rates));
2129 memcpy(sta->supported_rates, supp_rates, supp_rates_len);
2130 prism2_check_tx_rates(sta);
2131 }
2132 }
2133
2134 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2135
2136
2137 /* Called only as a tasklet. */
2138 static void handle_ap_item(local_info_t *local, struct sk_buff *skb,
2139 struct hostap_80211_rx_status *rx_stats)
2140 {
2141 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2142 struct net_device *dev = local->dev;
2143 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2144 u16 fc, type, stype;
2145 struct ieee80211_hdr_4addr *hdr;
2146
2147 /* FIX: should give skb->len to handler functions and check that the
2148 * buffer is long enough */
2149 hdr = (struct ieee80211_hdr_4addr *) skb->data;
2150 fc = le16_to_cpu(hdr->frame_ctl);
2151 type = WLAN_FC_GET_TYPE(fc);
2152 stype = WLAN_FC_GET_STYPE(fc);
2153
2154 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2155 if (!local->hostapd && type == IEEE80211_FTYPE_DATA) {
2156 PDEBUG(DEBUG_AP, "handle_ap_item - data frame\n");
2157
2158 if (!(fc & IEEE80211_FCTL_TODS) ||
2159 (fc & IEEE80211_FCTL_FROMDS)) {
2160 if (stype == IEEE80211_STYPE_NULLFUNC) {
2161 /* no ToDS nullfunc seems to be used to check
2162 * AP association; so send reject message to
2163 * speed up re-association */
2164 ap_handle_dropped_data(local, hdr);
2165 goto done;
2166 }
2167 PDEBUG(DEBUG_AP, " not ToDS frame (fc=0x%04x)\n",
2168 fc);
2169 goto done;
2170 }
2171
2172 if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN)) {
2173 PDEBUG(DEBUG_AP, "handle_ap_item - addr1(BSSID)="
2174 MACSTR " not own MAC\n",
2175 MAC2STR(hdr->addr1));
2176 goto done;
2177 }
2178
2179 if (local->ap->nullfunc_ack &&
2180 stype == IEEE80211_STYPE_NULLFUNC)
2181 ap_handle_data_nullfunc(local, hdr);
2182 else
2183 ap_handle_dropped_data(local, hdr);
2184 goto done;
2185 }
2186
2187 if (type == IEEE80211_FTYPE_MGMT && stype == IEEE80211_STYPE_BEACON) {
2188 handle_beacon(local, skb, rx_stats);
2189 goto done;
2190 }
2191 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2192
2193 if (type == IEEE80211_FTYPE_CTL && stype == IEEE80211_STYPE_PSPOLL) {
2194 handle_pspoll(local, hdr, rx_stats);
2195 goto done;
2196 }
2197
2198 if (local->hostapd) {
2199 PDEBUG(DEBUG_AP, "Unknown frame in AP queue: type=0x%02x "
2200 "subtype=0x%02x\n", type, stype);
2201 goto done;
2202 }
2203
2204 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2205 if (type != IEEE80211_FTYPE_MGMT) {
2206 PDEBUG(DEBUG_AP, "handle_ap_item - not a management frame?\n");
2207 goto done;
2208 }
2209
2210 if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN)) {
2211 PDEBUG(DEBUG_AP, "handle_ap_item - addr1(DA)=" MACSTR
2212 " not own MAC\n", MAC2STR(hdr->addr1));
2213 goto done;
2214 }
2215
2216 if (memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN)) {
2217 PDEBUG(DEBUG_AP, "handle_ap_item - addr3(BSSID)=" MACSTR
2218 " not own MAC\n", MAC2STR(hdr->addr3));
2219 goto done;
2220 }
2221
2222 switch (stype) {
2223 case IEEE80211_STYPE_ASSOC_REQ:
2224 handle_assoc(local, skb, rx_stats, 0);
2225 break;
2226 case IEEE80211_STYPE_ASSOC_RESP:
2227 PDEBUG(DEBUG_AP, "==> ASSOC RESP (ignored)\n");
2228 break;
2229 case IEEE80211_STYPE_REASSOC_REQ:
2230 handle_assoc(local, skb, rx_stats, 1);
2231 break;
2232 case IEEE80211_STYPE_REASSOC_RESP:
2233 PDEBUG(DEBUG_AP, "==> REASSOC RESP (ignored)\n");
2234 break;
2235 case IEEE80211_STYPE_ATIM:
2236 PDEBUG(DEBUG_AP, "==> ATIM (ignored)\n");
2237 break;
2238 case IEEE80211_STYPE_DISASSOC:
2239 handle_disassoc(local, skb, rx_stats);
2240 break;
2241 case IEEE80211_STYPE_AUTH:
2242 handle_authen(local, skb, rx_stats);
2243 break;
2244 case IEEE80211_STYPE_DEAUTH:
2245 handle_deauth(local, skb, rx_stats);
2246 break;
2247 default:
2248 PDEBUG(DEBUG_AP, "Unknown mgmt frame subtype 0x%02x\n",
2249 stype >> 4);
2250 break;
2251 }
2252 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2253
2254 done:
2255 dev_kfree_skb(skb);
2256 }
2257
2258
2259 /* Called only as a tasklet (software IRQ) */
2260 void hostap_rx(struct net_device *dev, struct sk_buff *skb,
2261 struct hostap_80211_rx_status *rx_stats)
2262 {
2263 struct hostap_interface *iface;
2264 local_info_t *local;
2265 u16 fc;
2266 struct ieee80211_hdr_4addr *hdr;
2267
2268 iface = netdev_priv(dev);
2269 local = iface->local;
2270
2271 if (skb->len < 16)
2272 goto drop;
2273
2274 local->stats.rx_packets++;
2275
2276 hdr = (struct ieee80211_hdr_4addr *) skb->data;
2277 fc = le16_to_cpu(hdr->frame_ctl);
2278
2279 if (local->ap->ap_policy == AP_OTHER_AP_SKIP_ALL &&
2280 WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_MGMT &&
2281 WLAN_FC_GET_STYPE(fc) == IEEE80211_STYPE_BEACON)
2282 goto drop;
2283
2284 skb->protocol = __constant_htons(ETH_P_HOSTAP);
2285 handle_ap_item(local, skb, rx_stats);
2286 return;
2287
2288 drop:
2289 dev_kfree_skb(skb);
2290 }
2291
2292
2293 /* Called only as a tasklet (software IRQ) */
2294 static void schedule_packet_send(local_info_t *local, struct sta_info *sta)
2295 {
2296 struct sk_buff *skb;
2297 struct ieee80211_hdr_4addr *hdr;
2298 struct hostap_80211_rx_status rx_stats;
2299
2300 if (skb_queue_empty(&sta->tx_buf))
2301 return;
2302
2303 skb = dev_alloc_skb(16);
2304 if (skb == NULL) {
2305 printk(KERN_DEBUG "%s: schedule_packet_send: skb alloc "
2306 "failed\n", local->dev->name);
2307 return;
2308 }
2309
2310 hdr = (struct ieee80211_hdr_4addr *) skb_put(skb, 16);
2311
2312 /* Generate a fake pspoll frame to start packet delivery */
2313 hdr->frame_ctl = __constant_cpu_to_le16(
2314 IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL);
2315 memcpy(hdr->addr1, local->dev->dev_addr, ETH_ALEN);
2316 memcpy(hdr->addr2, sta->addr, ETH_ALEN);
2317 hdr->duration_id = cpu_to_le16(sta->aid | BIT(15) | BIT(14));
2318
2319 PDEBUG(DEBUG_PS2, "%s: Scheduling buffered packet delivery for "
2320 "STA " MACSTR "\n", local->dev->name, MAC2STR(sta->addr));
2321
2322 skb->dev = local->dev;
2323
2324 memset(&rx_stats, 0, sizeof(rx_stats));
2325 hostap_rx(local->dev, skb, &rx_stats);
2326 }
2327
2328
2329 int prism2_ap_get_sta_qual(local_info_t *local, struct sockaddr addr[],
2330 struct iw_quality qual[], int buf_size,
2331 int aplist)
2332 {
2333 struct ap_data *ap = local->ap;
2334 struct list_head *ptr;
2335 int count = 0;
2336
2337 spin_lock_bh(&ap->sta_table_lock);
2338
2339 for (ptr = ap->sta_list.next; ptr != NULL && ptr != &ap->sta_list;
2340 ptr = ptr->next) {
2341 struct sta_info *sta = (struct sta_info *) ptr;
2342
2343 if (aplist && !sta->ap)
2344 continue;
2345 addr[count].sa_family = ARPHRD_ETHER;
2346 memcpy(addr[count].sa_data, sta->addr, ETH_ALEN);
2347 if (sta->last_rx_silence == 0)
2348 qual[count].qual = sta->last_rx_signal < 27 ?
2349 0 : (sta->last_rx_signal - 27) * 92 / 127;
2350 else
2351 qual[count].qual = sta->last_rx_signal -
2352 sta->last_rx_silence - 35;
2353 qual[count].level = HFA384X_LEVEL_TO_dBm(sta->last_rx_signal);
2354 qual[count].noise = HFA384X_LEVEL_TO_dBm(sta->last_rx_silence);
2355 qual[count].updated = sta->last_rx_updated;
2356
2357 sta->last_rx_updated = IW_QUAL_DBM;
2358
2359 count++;
2360 if (count >= buf_size)
2361 break;
2362 }
2363 spin_unlock_bh(&ap->sta_table_lock);
2364
2365 return count;
2366 }
2367
2368
2369 /* Translate our list of Access Points & Stations to a card independant
2370 * format that the Wireless Tools will understand - Jean II */
2371 int prism2_ap_translate_scan(struct net_device *dev, char *buffer)
2372 {
2373 struct hostap_interface *iface;
2374 local_info_t *local;
2375 struct ap_data *ap;
2376 struct list_head *ptr;
2377 struct iw_event iwe;
2378 char *current_ev = buffer;
2379 char *end_buf = buffer + IW_SCAN_MAX_DATA;
2380 #if !defined(PRISM2_NO_KERNEL_IEEE80211_MGMT)
2381 char buf[64];
2382 #endif
2383
2384 iface = netdev_priv(dev);
2385 local = iface->local;
2386 ap = local->ap;
2387
2388 spin_lock_bh(&ap->sta_table_lock);
2389
2390 for (ptr = ap->sta_list.next; ptr != NULL && ptr != &ap->sta_list;
2391 ptr = ptr->next) {
2392 struct sta_info *sta = (struct sta_info *) ptr;
2393
2394 /* First entry *MUST* be the AP MAC address */
2395 memset(&iwe, 0, sizeof(iwe));
2396 iwe.cmd = SIOCGIWAP;
2397 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
2398 memcpy(iwe.u.ap_addr.sa_data, sta->addr, ETH_ALEN);
2399 iwe.len = IW_EV_ADDR_LEN;
2400 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2401 IW_EV_ADDR_LEN);
2402
2403 /* Use the mode to indicate if it's a station or
2404 * an Access Point */
2405 memset(&iwe, 0, sizeof(iwe));
2406 iwe.cmd = SIOCGIWMODE;
2407 if (sta->ap)
2408 iwe.u.mode = IW_MODE_MASTER;
2409 else
2410 iwe.u.mode = IW_MODE_INFRA;
2411 iwe.len = IW_EV_UINT_LEN;
2412 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2413 IW_EV_UINT_LEN);
2414
2415 /* Some quality */
2416 memset(&iwe, 0, sizeof(iwe));
2417 iwe.cmd = IWEVQUAL;
2418 if (sta->last_rx_silence == 0)
2419 iwe.u.qual.qual = sta->last_rx_signal < 27 ?
2420 0 : (sta->last_rx_signal - 27) * 92 / 127;
2421 else
2422 iwe.u.qual.qual = sta->last_rx_signal -
2423 sta->last_rx_silence - 35;
2424 iwe.u.qual.level = HFA384X_LEVEL_TO_dBm(sta->last_rx_signal);
2425 iwe.u.qual.noise = HFA384X_LEVEL_TO_dBm(sta->last_rx_silence);
2426 iwe.u.qual.updated = sta->last_rx_updated;
2427 iwe.len = IW_EV_QUAL_LEN;
2428 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2429 IW_EV_QUAL_LEN);
2430
2431 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2432 if (sta->ap) {
2433 memset(&iwe, 0, sizeof(iwe));
2434 iwe.cmd = SIOCGIWESSID;
2435 iwe.u.data.length = sta->u.ap.ssid_len;
2436 iwe.u.data.flags = 1;
2437 current_ev = iwe_stream_add_point(current_ev, end_buf,
2438 &iwe,
2439 sta->u.ap.ssid);
2440
2441 memset(&iwe, 0, sizeof(iwe));
2442 iwe.cmd = SIOCGIWENCODE;
2443 if (sta->capability & WLAN_CAPABILITY_PRIVACY)
2444 iwe.u.data.flags =
2445 IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
2446 else
2447 iwe.u.data.flags = IW_ENCODE_DISABLED;
2448 current_ev = iwe_stream_add_point(current_ev, end_buf,
2449 &iwe,
2450 sta->u.ap.ssid
2451 /* 0 byte memcpy */);
2452
2453 if (sta->u.ap.channel > 0 &&
2454 sta->u.ap.channel <= FREQ_COUNT) {
2455 memset(&iwe, 0, sizeof(iwe));
2456 iwe.cmd = SIOCGIWFREQ;
2457 iwe.u.freq.m = freq_list[sta->u.ap.channel - 1]
2458 * 100000;
2459 iwe.u.freq.e = 1;
2460 current_ev = iwe_stream_add_event(
2461 current_ev, end_buf, &iwe,
2462 IW_EV_FREQ_LEN);
2463 }
2464
2465 memset(&iwe, 0, sizeof(iwe));
2466 iwe.cmd = IWEVCUSTOM;
2467 sprintf(buf, "beacon_interval=%d",
2468 sta->listen_interval);
2469 iwe.u.data.length = strlen(buf);
2470 current_ev = iwe_stream_add_point(current_ev, end_buf,
2471 &iwe, buf);
2472 }
2473 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2474
2475 sta->last_rx_updated = IW_QUAL_DBM;
2476
2477 /* To be continued, we should make good use of IWEVCUSTOM */
2478 }
2479
2480 spin_unlock_bh(&ap->sta_table_lock);
2481
2482 return current_ev - buffer;
2483 }
2484
2485
2486 static int prism2_hostapd_add_sta(struct ap_data *ap,
2487 struct prism2_hostapd_param *param)
2488 {
2489 struct sta_info *sta;
2490
2491 spin_lock_bh(&ap->sta_table_lock);
2492 sta = ap_get_sta(ap, param->sta_addr);
2493 if (sta)
2494 atomic_inc(&sta->users);
2495 spin_unlock_bh(&ap->sta_table_lock);
2496
2497 if (sta == NULL) {
2498 sta = ap_add_sta(ap, param->sta_addr);
2499 if (sta == NULL)
2500 return -1;
2501 }
2502
2503 if (!(sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
2504 hostap_event_new_sta(sta->local->dev, sta);
2505
2506 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC;
2507 sta->last_rx = jiffies;
2508 sta->aid = param->u.add_sta.aid;
2509 sta->capability = param->u.add_sta.capability;
2510 sta->tx_supp_rates = param->u.add_sta.tx_supp_rates;
2511 if (sta->tx_supp_rates & WLAN_RATE_1M)
2512 sta->supported_rates[0] = 2;
2513 if (sta->tx_supp_rates & WLAN_RATE_2M)
2514 sta->supported_rates[1] = 4;
2515 if (sta->tx_supp_rates & WLAN_RATE_5M5)
2516 sta->supported_rates[2] = 11;
2517 if (sta->tx_supp_rates & WLAN_RATE_11M)
2518 sta->supported_rates[3] = 22;
2519 prism2_check_tx_rates(sta);
2520 atomic_dec(&sta->users);
2521 return 0;
2522 }
2523
2524
2525 static int prism2_hostapd_remove_sta(struct ap_data *ap,
2526 struct prism2_hostapd_param *param)
2527 {
2528 struct sta_info *sta;
2529
2530 spin_lock_bh(&ap->sta_table_lock);
2531 sta = ap_get_sta(ap, param->sta_addr);
2532 if (sta) {
2533 ap_sta_hash_del(ap, sta);
2534 list_del(&sta->list);
2535 }
2536 spin_unlock_bh(&ap->sta_table_lock);
2537
2538 if (!sta)
2539 return -ENOENT;
2540
2541 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
2542 hostap_event_expired_sta(sta->local->dev, sta);
2543 ap_free_sta(ap, sta);
2544
2545 return 0;
2546 }
2547
2548
2549 static int prism2_hostapd_get_info_sta(struct ap_data *ap,
2550 struct prism2_hostapd_param *param)
2551 {
2552 struct sta_info *sta;
2553
2554 spin_lock_bh(&ap->sta_table_lock);
2555 sta = ap_get_sta(ap, param->sta_addr);
2556 if (sta)
2557 atomic_inc(&sta->users);
2558 spin_unlock_bh(&ap->sta_table_lock);
2559
2560 if (!sta)
2561 return -ENOENT;
2562
2563 param->u.get_info_sta.inactive_sec = (jiffies - sta->last_rx) / HZ;
2564
2565 atomic_dec(&sta->users);
2566
2567 return 1;
2568 }
2569
2570
2571 static int prism2_hostapd_set_flags_sta(struct ap_data *ap,
2572 struct prism2_hostapd_param *param)
2573 {
2574 struct sta_info *sta;
2575
2576 spin_lock_bh(&ap->sta_table_lock);
2577 sta = ap_get_sta(ap, param->sta_addr);
2578 if (sta) {
2579 sta->flags |= param->u.set_flags_sta.flags_or;
2580 sta->flags &= param->u.set_flags_sta.flags_and;
2581 }
2582 spin_unlock_bh(&ap->sta_table_lock);
2583
2584 if (!sta)
2585 return -ENOENT;
2586
2587 return 0;
2588 }
2589
2590
2591 static int prism2_hostapd_sta_clear_stats(struct ap_data *ap,
2592 struct prism2_hostapd_param *param)
2593 {
2594 struct sta_info *sta;
2595 int rate;
2596
2597 spin_lock_bh(&ap->sta_table_lock);
2598 sta = ap_get_sta(ap, param->sta_addr);
2599 if (sta) {
2600 sta->rx_packets = sta->tx_packets = 0;
2601 sta->rx_bytes = sta->tx_bytes = 0;
2602 for (rate = 0; rate < WLAN_RATE_COUNT; rate++) {
2603 sta->tx_count[rate] = 0;
2604 sta->rx_count[rate] = 0;
2605 }
2606 }
2607 spin_unlock_bh(&ap->sta_table_lock);
2608
2609 if (!sta)
2610 return -ENOENT;
2611
2612 return 0;
2613 }
2614
2615
2616 int prism2_hostapd(struct ap_data *ap, struct prism2_hostapd_param *param)
2617 {
2618 switch (param->cmd) {
2619 case PRISM2_HOSTAPD_FLUSH:
2620 ap_control_kickall(ap);
2621 return 0;
2622 case PRISM2_HOSTAPD_ADD_STA:
2623 return prism2_hostapd_add_sta(ap, param);
2624 case PRISM2_HOSTAPD_REMOVE_STA:
2625 return prism2_hostapd_remove_sta(ap, param);
2626 case PRISM2_HOSTAPD_GET_INFO_STA:
2627 return prism2_hostapd_get_info_sta(ap, param);
2628 case PRISM2_HOSTAPD_SET_FLAGS_STA:
2629 return prism2_hostapd_set_flags_sta(ap, param);
2630 case PRISM2_HOSTAPD_STA_CLEAR_STATS:
2631 return prism2_hostapd_sta_clear_stats(ap, param);
2632 default:
2633 printk(KERN_WARNING "prism2_hostapd: unknown cmd=%d\n",
2634 param->cmd);
2635 return -EOPNOTSUPP;
2636 }
2637 }
2638
2639
2640 /* Update station info for host-based TX rate control and return current
2641 * TX rate */
2642 static int ap_update_sta_tx_rate(struct sta_info *sta, struct net_device *dev)
2643 {
2644 int ret = sta->tx_rate;
2645 struct hostap_interface *iface;
2646 local_info_t *local;
2647
2648 iface = netdev_priv(dev);
2649 local = iface->local;
2650
2651 sta->tx_count[sta->tx_rate_idx]++;
2652 sta->tx_since_last_failure++;
2653 sta->tx_consecutive_exc = 0;
2654 if (sta->tx_since_last_failure >= WLAN_RATE_UPDATE_COUNT &&
2655 sta->tx_rate_idx < sta->tx_max_rate) {
2656 /* use next higher rate */
2657 int old_rate, new_rate;
2658 old_rate = new_rate = sta->tx_rate_idx;
2659 while (new_rate < sta->tx_max_rate) {
2660 new_rate++;
2661 if (ap_tx_rate_ok(new_rate, sta, local)) {
2662 sta->tx_rate_idx = new_rate;
2663 break;
2664 }
2665 }
2666 if (old_rate != sta->tx_rate_idx) {
2667 switch (sta->tx_rate_idx) {
2668 case 0: sta->tx_rate = 10; break;
2669 case 1: sta->tx_rate = 20; break;
2670 case 2: sta->tx_rate = 55; break;
2671 case 3: sta->tx_rate = 110; break;
2672 default: sta->tx_rate = 0; break;
2673 }
2674 PDEBUG(DEBUG_AP, "%s: STA " MACSTR " TX rate raised to"
2675 " %d\n", dev->name, MAC2STR(sta->addr),
2676 sta->tx_rate);
2677 }
2678 sta->tx_since_last_failure = 0;
2679 }
2680
2681 return ret;
2682 }
2683
2684
2685 /* Called only from software IRQ. Called for each TX frame prior possible
2686 * encryption and transmit. */
2687 ap_tx_ret hostap_handle_sta_tx(local_info_t *local, struct hostap_tx_data *tx)
2688 {
2689 struct sta_info *sta = NULL;
2690 struct sk_buff *skb = tx->skb;
2691 int set_tim, ret;
2692 struct ieee80211_hdr_4addr *hdr;
2693 struct hostap_skb_tx_data *meta;
2694
2695 meta = (struct hostap_skb_tx_data *) skb->cb;
2696 ret = AP_TX_CONTINUE;
2697 if (local->ap == NULL || skb->len < 10 ||
2698 meta->iface->type == HOSTAP_INTERFACE_STA)
2699 goto out;
2700
2701 hdr = (struct ieee80211_hdr_4addr *) skb->data;
2702
2703 if (hdr->addr1[0] & 0x01) {
2704 /* broadcast/multicast frame - no AP related processing */
2705 goto out;
2706 }
2707
2708 /* unicast packet - check whether destination STA is associated */
2709 spin_lock(&local->ap->sta_table_lock);
2710 sta = ap_get_sta(local->ap, hdr->addr1);
2711 if (sta)
2712 atomic_inc(&sta->users);
2713 spin_unlock(&local->ap->sta_table_lock);
2714
2715 if (local->iw_mode == IW_MODE_MASTER && sta == NULL &&
2716 !(meta->flags & HOSTAP_TX_FLAGS_WDS) &&
2717 meta->iface->type != HOSTAP_INTERFACE_MASTER &&
2718 meta->iface->type != HOSTAP_INTERFACE_AP) {
2719 #if 0
2720 /* This can happen, e.g., when wlan0 is added to a bridge and
2721 * bridging code does not know which port is the correct target
2722 * for a unicast frame. In this case, the packet is send to all
2723 * ports of the bridge. Since this is a valid scenario, do not
2724 * print out any errors here. */
2725 if (net_ratelimit()) {
2726 printk(KERN_DEBUG "AP: drop packet to non-associated "
2727 "STA " MACSTR "\n", MAC2STR(hdr->addr1));
2728 }
2729 #endif
2730 local->ap->tx_drop_nonassoc++;
2731 ret = AP_TX_DROP;
2732 goto out;
2733 }
2734
2735 if (sta == NULL)
2736 goto out;
2737
2738 if (!(sta->flags & WLAN_STA_AUTHORIZED))
2739 ret = AP_TX_CONTINUE_NOT_AUTHORIZED;
2740
2741 /* Set tx_rate if using host-based TX rate control */
2742 if (!local->fw_tx_rate_control)
2743 local->ap->last_tx_rate = meta->rate =
2744 ap_update_sta_tx_rate(sta, local->dev);
2745
2746 if (local->iw_mode != IW_MODE_MASTER)
2747 goto out;
2748
2749 if (!(sta->flags & WLAN_STA_PS))
2750 goto out;
2751
2752 if (meta->flags & HOSTAP_TX_FLAGS_ADD_MOREDATA) {
2753 /* indicate to STA that more frames follow */
2754 hdr->frame_ctl |=
2755 __constant_cpu_to_le16(IEEE80211_FCTL_MOREDATA);
2756 }
2757
2758 if (meta->flags & HOSTAP_TX_FLAGS_BUFFERED_FRAME) {
2759 /* packet was already buffered and now send due to
2760 * PS poll, so do not rebuffer it */
2761 goto out;
2762 }
2763
2764 if (skb_queue_len(&sta->tx_buf) >= STA_MAX_TX_BUFFER) {
2765 PDEBUG(DEBUG_PS, "%s: No more space in STA (" MACSTR ")'s PS "
2766 "mode buffer\n", local->dev->name, MAC2STR(sta->addr));
2767 /* Make sure that TIM is set for the station (it might not be
2768 * after AP wlan hw reset). */
2769 /* FIX: should fix hw reset to restore bits based on STA
2770 * buffer state.. */
2771 hostap_set_tim(local, sta->aid, 1);
2772 sta->flags |= WLAN_STA_TIM;
2773 ret = AP_TX_DROP;
2774 goto out;
2775 }
2776
2777 /* STA in PS mode, buffer frame for later delivery */
2778 set_tim = skb_queue_empty(&sta->tx_buf);
2779 skb_queue_tail(&sta->tx_buf, skb);
2780 /* FIX: could save RX time to skb and expire buffered frames after
2781 * some time if STA does not poll for them */
2782
2783 if (set_tim) {
2784 if (sta->flags & WLAN_STA_TIM)
2785 PDEBUG(DEBUG_PS2, "Re-setting TIM for aid %d\n",
2786 sta->aid);
2787 hostap_set_tim(local, sta->aid, 1);
2788 sta->flags |= WLAN_STA_TIM;
2789 }
2790
2791 ret = AP_TX_BUFFERED;
2792
2793 out:
2794 if (sta != NULL) {
2795 if (ret == AP_TX_CONTINUE ||
2796 ret == AP_TX_CONTINUE_NOT_AUTHORIZED) {
2797 sta->tx_packets++;
2798 sta->tx_bytes += skb->len;
2799 sta->last_tx = jiffies;
2800 }
2801
2802 if ((ret == AP_TX_CONTINUE ||
2803 ret == AP_TX_CONTINUE_NOT_AUTHORIZED) &&
2804 sta->crypt && tx->host_encrypt) {
2805 tx->crypt = sta->crypt;
2806 tx->sta_ptr = sta; /* hostap_handle_sta_release() will
2807 * be called to release sta info
2808 * later */
2809 } else
2810 atomic_dec(&sta->users);
2811 }
2812
2813 return ret;
2814 }
2815
2816
2817 void hostap_handle_sta_release(void *ptr)
2818 {
2819 struct sta_info *sta = ptr;
2820 atomic_dec(&sta->users);
2821 }
2822
2823
2824 /* Called only as a tasklet (software IRQ) */
2825 void hostap_handle_sta_tx_exc(local_info_t *local, struct sk_buff *skb)
2826 {
2827 struct sta_info *sta;
2828 struct ieee80211_hdr_4addr *hdr;
2829 struct hostap_skb_tx_data *meta;
2830
2831 hdr = (struct ieee80211_hdr_4addr *) skb->data;
2832 meta = (struct hostap_skb_tx_data *) skb->cb;
2833
2834 spin_lock(&local->ap->sta_table_lock);
2835 sta = ap_get_sta(local->ap, hdr->addr1);
2836 if (!sta) {
2837 spin_unlock(&local->ap->sta_table_lock);
2838 PDEBUG(DEBUG_AP, "%s: Could not find STA " MACSTR " for this "
2839 "TX error (@%lu)\n",
2840 local->dev->name, MAC2STR(hdr->addr1), jiffies);
2841 return;
2842 }
2843
2844 sta->tx_since_last_failure = 0;
2845 sta->tx_consecutive_exc++;
2846
2847 if (sta->tx_consecutive_exc >= WLAN_RATE_DECREASE_THRESHOLD &&
2848 sta->tx_rate_idx > 0 && meta->rate <= sta->tx_rate) {
2849 /* use next lower rate */
2850 int old, rate;
2851 old = rate = sta->tx_rate_idx;
2852 while (rate > 0) {
2853 rate--;
2854 if (ap_tx_rate_ok(rate, sta, local)) {
2855 sta->tx_rate_idx = rate;
2856 break;
2857 }
2858 }
2859 if (old != sta->tx_rate_idx) {
2860 switch (sta->tx_rate_idx) {
2861 case 0: sta->tx_rate = 10; break;
2862 case 1: sta->tx_rate = 20; break;
2863 case 2: sta->tx_rate = 55; break;
2864 case 3: sta->tx_rate = 110; break;
2865 default: sta->tx_rate = 0; break;
2866 }
2867 PDEBUG(DEBUG_AP, "%s: STA " MACSTR " TX rate lowered "
2868 "to %d\n", local->dev->name, MAC2STR(sta->addr),
2869 sta->tx_rate);
2870 }
2871 sta->tx_consecutive_exc = 0;
2872 }
2873 spin_unlock(&local->ap->sta_table_lock);
2874 }
2875
2876
2877 static void hostap_update_sta_ps2(local_info_t *local, struct sta_info *sta,
2878 int pwrmgt, int type, int stype)
2879 {
2880 if (pwrmgt && !(sta->flags & WLAN_STA_PS)) {
2881 sta->flags |= WLAN_STA_PS;
2882 PDEBUG(DEBUG_PS2, "STA " MACSTR " changed to use PS "
2883 "mode (type=0x%02X, stype=0x%02X)\n",
2884 MAC2STR(sta->addr), type >> 2, stype >> 4);
2885 } else if (!pwrmgt && (sta->flags & WLAN_STA_PS)) {
2886 sta->flags &= ~WLAN_STA_PS;
2887 PDEBUG(DEBUG_PS2, "STA " MACSTR " changed to not use "
2888 "PS mode (type=0x%02X, stype=0x%02X)\n",
2889 MAC2STR(sta->addr), type >> 2, stype >> 4);
2890 if (type != IEEE80211_FTYPE_CTL ||
2891 stype != IEEE80211_STYPE_PSPOLL)
2892 schedule_packet_send(local, sta);
2893 }
2894 }
2895
2896
2897 /* Called only as a tasklet (software IRQ). Called for each RX frame to update
2898 * STA power saving state. pwrmgt is a flag from 802.11 frame_ctl field. */
2899 int hostap_update_sta_ps(local_info_t *local, struct ieee80211_hdr_4addr *hdr)
2900 {
2901 struct sta_info *sta;
2902 u16 fc;
2903
2904 spin_lock(&local->ap->sta_table_lock);
2905 sta = ap_get_sta(local->ap, hdr->addr2);
2906 if (sta)
2907 atomic_inc(&sta->users);
2908 spin_unlock(&local->ap->sta_table_lock);
2909
2910 if (!sta)
2911 return -1;
2912
2913 fc = le16_to_cpu(hdr->frame_ctl);
2914 hostap_update_sta_ps2(local, sta, fc & IEEE80211_FCTL_PM,
2915 WLAN_FC_GET_TYPE(fc), WLAN_FC_GET_STYPE(fc));
2916
2917 atomic_dec(&sta->users);
2918 return 0;
2919 }
2920
2921
2922 /* Called only as a tasklet (software IRQ). Called for each RX frame after
2923 * getting RX header and payload from hardware. */
2924 ap_rx_ret hostap_handle_sta_rx(local_info_t *local, struct net_device *dev,
2925 struct sk_buff *skb,
2926 struct hostap_80211_rx_status *rx_stats,
2927 int wds)
2928 {
2929 int ret;
2930 struct sta_info *sta;
2931 u16 fc, type, stype;
2932 struct ieee80211_hdr_4addr *hdr;
2933
2934 if (local->ap == NULL)
2935 return AP_RX_CONTINUE;
2936
2937 hdr = (struct ieee80211_hdr_4addr *) skb->data;
2938
2939 fc = le16_to_cpu(hdr->frame_ctl);
2940 type = WLAN_FC_GET_TYPE(fc);
2941 stype = WLAN_FC_GET_STYPE(fc);
2942
2943 spin_lock(&local->ap->sta_table_lock);
2944 sta = ap_get_sta(local->ap, hdr->addr2);
2945 if (sta)
2946 atomic_inc(&sta->users);
2947 spin_unlock(&local->ap->sta_table_lock);
2948
2949 if (sta && !(sta->flags & WLAN_STA_AUTHORIZED))
2950 ret = AP_RX_CONTINUE_NOT_AUTHORIZED;
2951 else
2952 ret = AP_RX_CONTINUE;
2953
2954
2955 if (fc & IEEE80211_FCTL_TODS) {
2956 if (!wds && (sta == NULL || !(sta->flags & WLAN_STA_ASSOC))) {
2957 if (local->hostapd) {
2958 prism2_rx_80211(local->apdev, skb, rx_stats,
2959 PRISM2_RX_NON_ASSOC);
2960 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2961 } else {
2962 printk(KERN_DEBUG "%s: dropped received packet"
2963 " from non-associated STA " MACSTR
2964 " (type=0x%02x, subtype=0x%02x)\n",
2965 dev->name, MAC2STR(hdr->addr2),
2966 type >> 2, stype >> 4);
2967 hostap_rx(dev, skb, rx_stats);
2968 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2969 }
2970 ret = AP_RX_EXIT;
2971 goto out;
2972 }
2973 } else if (fc & IEEE80211_FCTL_FROMDS) {
2974 if (!wds) {
2975 /* FromDS frame - not for us; probably
2976 * broadcast/multicast in another BSS - drop */
2977 if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
2978 printk(KERN_DEBUG "Odd.. FromDS packet "
2979 "received with own BSSID\n");
2980 hostap_dump_rx_80211(dev->name, skb, rx_stats);
2981 }
2982 ret = AP_RX_DROP;
2983 goto out;
2984 }
2985 } else if (stype == IEEE80211_STYPE_NULLFUNC && sta == NULL &&
2986 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
2987
2988 if (local->hostapd) {
2989 prism2_rx_80211(local->apdev, skb, rx_stats,
2990 PRISM2_RX_NON_ASSOC);
2991 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2992 } else {
2993 /* At least Lucent f/w seems to send data::nullfunc
2994 * frames with no ToDS flag when the current AP returns
2995 * after being unavailable for some time. Speed up
2996 * re-association by informing the station about it not
2997 * being associated. */
2998 printk(KERN_DEBUG "%s: rejected received nullfunc "
2999 "frame without ToDS from not associated STA "
3000 MACSTR "\n",
3001 dev->name, MAC2STR(hdr->addr2));
3002 hostap_rx(dev, skb, rx_stats);
3003 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
3004 }
3005 ret = AP_RX_EXIT;
3006 goto out;
3007 } else if (stype == IEEE80211_STYPE_NULLFUNC) {
3008 /* At least Lucent cards seem to send periodic nullfunc
3009 * frames with ToDS. Let these through to update SQ
3010 * stats and PS state. Nullfunc frames do not contain
3011 * any data and they will be dropped below. */
3012 } else {
3013 /* If BSSID (Addr3) is foreign, this frame is a normal
3014 * broadcast frame from an IBSS network. Drop it silently.
3015 * If BSSID is own, report the dropping of this frame. */
3016 if (memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
3017 printk(KERN_DEBUG "%s: dropped received packet from "
3018 MACSTR " with no ToDS flag (type=0x%02x, "
3019 "subtype=0x%02x)\n", dev->name,
3020 MAC2STR(hdr->addr2), type >> 2, stype >> 4);
3021 hostap_dump_rx_80211(dev->name, skb, rx_stats);
3022 }
3023 ret = AP_RX_DROP;
3024 goto out;
3025 }
3026
3027 if (sta) {
3028 hostap_update_sta_ps2(local, sta, fc & IEEE80211_FCTL_PM,
3029 type, stype);
3030
3031 sta->rx_packets++;
3032 sta->rx_bytes += skb->len;
3033 sta->last_rx = jiffies;
3034 }
3035
3036 if (local->ap->nullfunc_ack && stype == IEEE80211_STYPE_NULLFUNC &&
3037 fc & IEEE80211_FCTL_TODS) {
3038 if (local->hostapd) {
3039 prism2_rx_80211(local->apdev, skb, rx_stats,
3040 PRISM2_RX_NULLFUNC_ACK);
3041 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
3042 } else {
3043 /* some STA f/w's seem to require control::ACK frame
3044 * for data::nullfunc, but Prism2 f/w 0.8.0 (at least
3045 * from Compaq) does not send this.. Try to generate
3046 * ACK for these frames from the host driver to make
3047 * power saving work with, e.g., Lucent WaveLAN f/w */
3048 hostap_rx(dev, skb, rx_stats);
3049 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
3050 }
3051 ret = AP_RX_EXIT;
3052 goto out;
3053 }
3054
3055 out:
3056 if (sta)
3057 atomic_dec(&sta->users);
3058
3059 return ret;
3060 }
3061
3062
3063 /* Called only as a tasklet (software IRQ) */
3064 int hostap_handle_sta_crypto(local_info_t *local,
3065 struct ieee80211_hdr_4addr *hdr,
3066 struct ieee80211_crypt_data **crypt,
3067 void **sta_ptr)
3068 {
3069 struct sta_info *sta;
3070
3071 spin_lock(&local->ap->sta_table_lock);
3072 sta = ap_get_sta(local->ap, hdr->addr2);
3073 if (sta)
3074 atomic_inc(&sta->users);
3075 spin_unlock(&local->ap->sta_table_lock);
3076
3077 if (!sta)
3078 return -1;
3079
3080 if (sta->crypt) {
3081 *crypt = sta->crypt;
3082 *sta_ptr = sta;
3083 /* hostap_handle_sta_release() will be called to release STA
3084 * info */
3085 } else
3086 atomic_dec(&sta->users);
3087
3088 return 0;
3089 }
3090
3091
3092 /* Called only as a tasklet (software IRQ) */
3093 int hostap_is_sta_assoc(struct ap_data *ap, u8 *sta_addr)
3094 {
3095 struct sta_info *sta;
3096 int ret = 0;
3097
3098 spin_lock(&ap->sta_table_lock);
3099 sta = ap_get_sta(ap, sta_addr);
3100 if (sta != NULL && (sta->flags & WLAN_STA_ASSOC) && !sta->ap)
3101 ret = 1;
3102 spin_unlock(&ap->sta_table_lock);
3103
3104 return ret;
3105 }
3106
3107
3108 /* Called only as a tasklet (software IRQ) */
3109 int hostap_is_sta_authorized(struct ap_data *ap, u8 *sta_addr)
3110 {
3111 struct sta_info *sta;
3112 int ret = 0;
3113
3114 spin_lock(&ap->sta_table_lock);
3115 sta = ap_get_sta(ap, sta_addr);
3116 if (sta != NULL && (sta->flags & WLAN_STA_ASSOC) && !sta->ap &&
3117 ((sta->flags & WLAN_STA_AUTHORIZED) ||
3118 ap->local->ieee_802_1x == 0))
3119 ret = 1;
3120 spin_unlock(&ap->sta_table_lock);
3121
3122 return ret;
3123 }
3124
3125
3126 /* Called only as a tasklet (software IRQ) */
3127 int hostap_add_sta(struct ap_data *ap, u8 *sta_addr)
3128 {
3129 struct sta_info *sta;
3130 int ret = 1;
3131
3132 if (!ap)
3133 return -1;
3134
3135 spin_lock(&ap->sta_table_lock);
3136 sta = ap_get_sta(ap, sta_addr);
3137 if (sta)
3138 ret = 0;
3139 spin_unlock(&ap->sta_table_lock);
3140
3141 if (ret == 1) {
3142 sta = ap_add_sta(ap, sta_addr);
3143 if (!sta)
3144 return -1;
3145 sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
3146 sta->ap = 1;
3147 memset(sta->supported_rates, 0, sizeof(sta->supported_rates));
3148 /* No way of knowing which rates are supported since we did not
3149 * get supported rates element from beacon/assoc req. Assume
3150 * that remote end supports all 802.11b rates. */
3151 sta->supported_rates[0] = 0x82;
3152 sta->supported_rates[1] = 0x84;
3153 sta->supported_rates[2] = 0x0b;
3154 sta->supported_rates[3] = 0x16;
3155 sta->tx_supp_rates = WLAN_RATE_1M | WLAN_RATE_2M |
3156 WLAN_RATE_5M5 | WLAN_RATE_11M;
3157 sta->tx_rate = 110;
3158 sta->tx_max_rate = sta->tx_rate_idx = 3;
3159 }
3160
3161 return ret;
3162 }
3163
3164
3165 /* Called only as a tasklet (software IRQ) */
3166 int hostap_update_rx_stats(struct ap_data *ap,
3167 struct ieee80211_hdr_4addr *hdr,
3168 struct hostap_80211_rx_status *rx_stats)
3169 {
3170 struct sta_info *sta;
3171
3172 if (!ap)
3173 return -1;
3174
3175 spin_lock(&ap->sta_table_lock);
3176 sta = ap_get_sta(ap, hdr->addr2);
3177 if (sta) {
3178 sta->last_rx_silence = rx_stats->noise;
3179 sta->last_rx_signal = rx_stats->signal;
3180 sta->last_rx_rate = rx_stats->rate;
3181 sta->last_rx_updated = IW_QUAL_ALL_UPDATED | IW_QUAL_DBM;
3182 if (rx_stats->rate == 10)
3183 sta->rx_count[0]++;
3184 else if (rx_stats->rate == 20)
3185 sta->rx_count[1]++;
3186 else if (rx_stats->rate == 55)
3187 sta->rx_count[2]++;
3188 else if (rx_stats->rate == 110)
3189 sta->rx_count[3]++;
3190 }
3191 spin_unlock(&ap->sta_table_lock);
3192
3193 return sta ? 0 : -1;
3194 }
3195
3196
3197 void hostap_update_rates(local_info_t *local)
3198 {
3199 struct list_head *ptr;
3200 struct ap_data *ap = local->ap;
3201
3202 if (!ap)
3203 return;
3204
3205 spin_lock_bh(&ap->sta_table_lock);
3206 for (ptr = ap->sta_list.next; ptr != &ap->sta_list; ptr = ptr->next) {
3207 struct sta_info *sta = (struct sta_info *) ptr;
3208 prism2_check_tx_rates(sta);
3209 }
3210 spin_unlock_bh(&ap->sta_table_lock);
3211 }
3212
3213
3214 void * ap_crypt_get_ptrs(struct ap_data *ap, u8 *addr, int permanent,
3215 struct ieee80211_crypt_data ***crypt)
3216 {
3217 struct sta_info *sta;
3218
3219 spin_lock_bh(&ap->sta_table_lock);
3220 sta = ap_get_sta(ap, addr);
3221 if (sta)
3222 atomic_inc(&sta->users);
3223 spin_unlock_bh(&ap->sta_table_lock);
3224
3225 if (!sta && permanent)
3226 sta = ap_add_sta(ap, addr);
3227
3228 if (!sta)
3229 return NULL;
3230
3231 if (permanent)
3232 sta->flags |= WLAN_STA_PERM;
3233
3234 *crypt = &sta->crypt;
3235
3236 return sta;
3237 }
3238
3239
3240 void hostap_add_wds_links(local_info_t *local)
3241 {
3242 struct ap_data *ap = local->ap;
3243 struct list_head *ptr;
3244
3245 spin_lock_bh(&ap->sta_table_lock);
3246 list_for_each(ptr, &ap->sta_list) {
3247 struct sta_info *sta = list_entry(ptr, struct sta_info, list);
3248 if (sta->ap)
3249 hostap_wds_link_oper(local, sta->addr, WDS_ADD);
3250 }
3251 spin_unlock_bh(&ap->sta_table_lock);
3252
3253 schedule_work(&local->ap->wds_oper_queue);
3254 }
3255
3256
3257 void hostap_wds_link_oper(local_info_t *local, u8 *addr, wds_oper_type type)
3258 {
3259 struct wds_oper_data *entry;
3260
3261 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
3262 if (!entry)
3263 return;
3264 memcpy(entry->addr, addr, ETH_ALEN);
3265 entry->type = type;
3266 spin_lock_bh(&local->lock);
3267 entry->next = local->ap->wds_oper_entries;
3268 local->ap->wds_oper_entries = entry;
3269 spin_unlock_bh(&local->lock);
3270
3271 schedule_work(&local->ap->wds_oper_queue);
3272 }
3273
3274
3275 EXPORT_SYMBOL(hostap_init_data);
3276 EXPORT_SYMBOL(hostap_init_ap_proc);
3277 EXPORT_SYMBOL(hostap_free_data);
3278 EXPORT_SYMBOL(hostap_check_sta_fw_version);
3279 EXPORT_SYMBOL(hostap_handle_sta_tx_exc);
3280 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
3281 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
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