1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Intersil Prism2 driver with Host AP (software access point) support
4 * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
5 * <j@w1.fi>
6 * Copyright (c) 2002-2005, Jouni Malinen <j@w1.fi>
7 *
8 * This file is to be included into hostap.c when S/W AP functionality is
9 * compiled.
10 *
11 * AP: FIX:
12 * - if unicast Class 2 (assoc,reassoc,disassoc) frame received from
13 * unauthenticated STA, send deauth. frame (8802.11: 5.5)
14 * - if unicast Class 3 (data with to/from DS,deauth,pspoll) frame received
15 * from authenticated, but unassoc STA, send disassoc frame (8802.11: 5.5)
16 * - if unicast Class 3 received from unauthenticated STA, send deauth. frame
17 * (8802.11: 5.5)
18 */
19
20 #include <linux/proc_fs.h>
21 #include <linux/seq_file.h>
22 #include <linux/delay.h>
23 #include <linux/random.h>
24 #include <linux/if_arp.h>
25 #include <linux/slab.h>
26 #include <linux/export.h>
27 #include <linux/moduleparam.h>
28 #include <linux/etherdevice.h>
29
30 #include "hostap_wlan.h"
31 #include "hostap.h"
32 #include "hostap_ap.h"
33
34 static int other_ap_policy[MAX_PARM_DEVICES] = { AP_OTHER_AP_SKIP_ALL,
35 DEF_INTS };
36 module_param_array(other_ap_policy, int, NULL, 0444);
37 MODULE_PARM_DESC(other_ap_policy, "Other AP beacon monitoring policy (0-3)");
38
39 static int ap_max_inactivity[MAX_PARM_DEVICES] = { AP_MAX_INACTIVITY_SEC,
40 DEF_INTS };
41 module_param_array(ap_max_inactivity, int, NULL, 0444);
42 MODULE_PARM_DESC(ap_max_inactivity, "AP timeout (in seconds) for station "
43 "inactivity");
44
45 static int ap_bridge_packets[MAX_PARM_DEVICES] = { 1, DEF_INTS };
46 module_param_array(ap_bridge_packets, int, NULL, 0444);
47 MODULE_PARM_DESC(ap_bridge_packets, "Bridge packets directly between "
48 "stations");
49
50 static int autom_ap_wds[MAX_PARM_DEVICES] = { 0, DEF_INTS };
51 module_param_array(autom_ap_wds, int, NULL, 0444);
52 MODULE_PARM_DESC(autom_ap_wds, "Add WDS connections to other APs "
53 "automatically");
54
55
56 static struct sta_info* ap_get_sta(struct ap_data *ap, u8 *sta);
57 static void hostap_event_expired_sta(struct net_device *dev,
58 struct sta_info *sta);
59 static void handle_add_proc_queue(struct work_struct *work);
60
61 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
62 static void handle_wds_oper_queue(struct work_struct *work);
63 static void prism2_send_mgmt(struct net_device *dev,
64 u16 type_subtype, char *body,
65 int body_len, u8 *addr, u16 tx_cb_idx);
66 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
67
68
69 #ifndef PRISM2_NO_PROCFS_DEBUG
ap_debug_proc_show(struct seq_file * m,void * v)70 static int ap_debug_proc_show(struct seq_file *m, void *v)
71 {
72 struct ap_data *ap = m->private;
73
74 seq_printf(m, "BridgedUnicastFrames=%u\n", ap->bridged_unicast);
75 seq_printf(m, "BridgedMulticastFrames=%u\n", ap->bridged_multicast);
76 seq_printf(m, "max_inactivity=%u\n", ap->max_inactivity / HZ);
77 seq_printf(m, "bridge_packets=%u\n", ap->bridge_packets);
78 seq_printf(m, "nullfunc_ack=%u\n", ap->nullfunc_ack);
79 seq_printf(m, "autom_ap_wds=%u\n", ap->autom_ap_wds);
80 seq_printf(m, "auth_algs=%u\n", ap->local->auth_algs);
81 seq_printf(m, "tx_drop_nonassoc=%u\n", ap->tx_drop_nonassoc);
82 return 0;
83 }
84
ap_debug_proc_open(struct inode * inode,struct file * file)85 static int ap_debug_proc_open(struct inode *inode, struct file *file)
86 {
87 return single_open(file, ap_debug_proc_show, PDE_DATA(inode));
88 }
89
90 static const struct file_operations ap_debug_proc_fops = {
91 .open = ap_debug_proc_open,
92 .read = seq_read,
93 .llseek = seq_lseek,
94 .release = single_release,
95 };
96 #endif /* PRISM2_NO_PROCFS_DEBUG */
97
98
ap_sta_hash_add(struct ap_data * ap,struct sta_info * sta)99 static void ap_sta_hash_add(struct ap_data *ap, struct sta_info *sta)
100 {
101 sta->hnext = ap->sta_hash[STA_HASH(sta->addr)];
102 ap->sta_hash[STA_HASH(sta->addr)] = sta;
103 }
104
ap_sta_hash_del(struct ap_data * ap,struct sta_info * sta)105 static void ap_sta_hash_del(struct ap_data *ap, struct sta_info *sta)
106 {
107 struct sta_info *s;
108
109 s = ap->sta_hash[STA_HASH(sta->addr)];
110 if (s == NULL) return;
111 if (ether_addr_equal(s->addr, sta->addr)) {
112 ap->sta_hash[STA_HASH(sta->addr)] = s->hnext;
113 return;
114 }
115
116 while (s->hnext != NULL && !ether_addr_equal(s->hnext->addr, sta->addr))
117 s = s->hnext;
118 if (s->hnext != NULL)
119 s->hnext = s->hnext->hnext;
120 else
121 printk("AP: could not remove STA %pM from hash table\n",
122 sta->addr);
123 }
124
ap_free_sta(struct ap_data * ap,struct sta_info * sta)125 static void ap_free_sta(struct ap_data *ap, struct sta_info *sta)
126 {
127 if (sta->ap && sta->local)
128 hostap_event_expired_sta(sta->local->dev, sta);
129
130 if (ap->proc != NULL) {
131 char name[20];
132 sprintf(name, "%pM", sta->addr);
133 remove_proc_entry(name, ap->proc);
134 }
135
136 if (sta->crypt) {
137 sta->crypt->ops->deinit(sta->crypt->priv);
138 kfree(sta->crypt);
139 sta->crypt = NULL;
140 }
141
142 skb_queue_purge(&sta->tx_buf);
143
144 ap->num_sta--;
145 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
146 if (sta->aid > 0)
147 ap->sta_aid[sta->aid - 1] = NULL;
148
149 if (!sta->ap)
150 kfree(sta->u.sta.challenge);
151 del_timer_sync(&sta->timer);
152 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
153
154 kfree(sta);
155 }
156
157
hostap_set_tim(local_info_t * local,int aid,int set)158 static void hostap_set_tim(local_info_t *local, int aid, int set)
159 {
160 if (local->func->set_tim)
161 local->func->set_tim(local->dev, aid, set);
162 }
163
164
hostap_event_new_sta(struct net_device * dev,struct sta_info * sta)165 static void hostap_event_new_sta(struct net_device *dev, struct sta_info *sta)
166 {
167 union iwreq_data wrqu;
168 memset(&wrqu, 0, sizeof(wrqu));
169 memcpy(wrqu.addr.sa_data, sta->addr, ETH_ALEN);
170 wrqu.addr.sa_family = ARPHRD_ETHER;
171 wireless_send_event(dev, IWEVREGISTERED, &wrqu, NULL);
172 }
173
174
hostap_event_expired_sta(struct net_device * dev,struct sta_info * sta)175 static void hostap_event_expired_sta(struct net_device *dev,
176 struct sta_info *sta)
177 {
178 union iwreq_data wrqu;
179 memset(&wrqu, 0, sizeof(wrqu));
180 memcpy(wrqu.addr.sa_data, sta->addr, ETH_ALEN);
181 wrqu.addr.sa_family = ARPHRD_ETHER;
182 wireless_send_event(dev, IWEVEXPIRED, &wrqu, NULL);
183 }
184
185
186 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
187
ap_handle_timer(unsigned long data)188 static void ap_handle_timer(unsigned long data)
189 {
190 struct sta_info *sta = (struct sta_info *) data;
191 local_info_t *local;
192 struct ap_data *ap;
193 unsigned long next_time = 0;
194 int was_assoc;
195
196 if (sta == NULL || sta->local == NULL || sta->local->ap == NULL) {
197 PDEBUG(DEBUG_AP, "ap_handle_timer() called with NULL data\n");
198 return;
199 }
200
201 local = sta->local;
202 ap = local->ap;
203 was_assoc = sta->flags & WLAN_STA_ASSOC;
204
205 if (atomic_read(&sta->users) != 0)
206 next_time = jiffies + HZ;
207 else if ((sta->flags & WLAN_STA_PERM) && !(sta->flags & WLAN_STA_AUTH))
208 next_time = jiffies + ap->max_inactivity;
209
210 if (time_before(jiffies, sta->last_rx + ap->max_inactivity)) {
211 /* station activity detected; reset timeout state */
212 sta->timeout_next = STA_NULLFUNC;
213 next_time = sta->last_rx + ap->max_inactivity;
214 } else if (sta->timeout_next == STA_DISASSOC &&
215 !(sta->flags & WLAN_STA_PENDING_POLL)) {
216 /* STA ACKed data nullfunc frame poll */
217 sta->timeout_next = STA_NULLFUNC;
218 next_time = jiffies + ap->max_inactivity;
219 }
220
221 if (next_time) {
222 sta->timer.expires = next_time;
223 add_timer(&sta->timer);
224 return;
225 }
226
227 if (sta->ap)
228 sta->timeout_next = STA_DEAUTH;
229
230 if (sta->timeout_next == STA_DEAUTH && !(sta->flags & WLAN_STA_PERM)) {
231 spin_lock(&ap->sta_table_lock);
232 ap_sta_hash_del(ap, sta);
233 list_del(&sta->list);
234 spin_unlock(&ap->sta_table_lock);
235 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
236 } else if (sta->timeout_next == STA_DISASSOC)
237 sta->flags &= ~WLAN_STA_ASSOC;
238
239 if (was_assoc && !(sta->flags & WLAN_STA_ASSOC) && !sta->ap)
240 hostap_event_expired_sta(local->dev, sta);
241
242 if (sta->timeout_next == STA_DEAUTH && sta->aid > 0 &&
243 !skb_queue_empty(&sta->tx_buf)) {
244 hostap_set_tim(local, sta->aid, 0);
245 sta->flags &= ~WLAN_STA_TIM;
246 }
247
248 if (sta->ap) {
249 if (ap->autom_ap_wds) {
250 PDEBUG(DEBUG_AP, "%s: removing automatic WDS "
251 "connection to AP %pM\n",
252 local->dev->name, sta->addr);
253 hostap_wds_link_oper(local, sta->addr, WDS_DEL);
254 }
255 } else if (sta->timeout_next == STA_NULLFUNC) {
256 /* send data frame to poll STA and check whether this frame
257 * is ACKed */
258 /* FIX: IEEE80211_STYPE_NULLFUNC would be more appropriate, but
259 * it is apparently not retried so TX Exc events are not
260 * received for it */
261 sta->flags |= WLAN_STA_PENDING_POLL;
262 prism2_send_mgmt(local->dev, IEEE80211_FTYPE_DATA |
263 IEEE80211_STYPE_DATA, NULL, 0,
264 sta->addr, ap->tx_callback_poll);
265 } else {
266 int deauth = sta->timeout_next == STA_DEAUTH;
267 __le16 resp;
268 PDEBUG(DEBUG_AP, "%s: sending %s info to STA %pM"
269 "(last=%lu, jiffies=%lu)\n",
270 local->dev->name,
271 deauth ? "deauthentication" : "disassociation",
272 sta->addr, sta->last_rx, jiffies);
273
274 resp = cpu_to_le16(deauth ? WLAN_REASON_PREV_AUTH_NOT_VALID :
275 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
276 prism2_send_mgmt(local->dev, IEEE80211_FTYPE_MGMT |
277 (deauth ? IEEE80211_STYPE_DEAUTH :
278 IEEE80211_STYPE_DISASSOC),
279 (char *) &resp, 2, sta->addr, 0);
280 }
281
282 if (sta->timeout_next == STA_DEAUTH) {
283 if (sta->flags & WLAN_STA_PERM) {
284 PDEBUG(DEBUG_AP, "%s: STA %pM"
285 " would have been removed, "
286 "but it has 'perm' flag\n",
287 local->dev->name, sta->addr);
288 } else
289 ap_free_sta(ap, sta);
290 return;
291 }
292
293 if (sta->timeout_next == STA_NULLFUNC) {
294 sta->timeout_next = STA_DISASSOC;
295 sta->timer.expires = jiffies + AP_DISASSOC_DELAY;
296 } else {
297 sta->timeout_next = STA_DEAUTH;
298 sta->timer.expires = jiffies + AP_DEAUTH_DELAY;
299 }
300
301 add_timer(&sta->timer);
302 }
303
304
hostap_deauth_all_stas(struct net_device * dev,struct ap_data * ap,int resend)305 void hostap_deauth_all_stas(struct net_device *dev, struct ap_data *ap,
306 int resend)
307 {
308 u8 addr[ETH_ALEN];
309 __le16 resp;
310 int i;
311
312 PDEBUG(DEBUG_AP, "%s: Deauthenticate all stations\n", dev->name);
313 eth_broadcast_addr(addr);
314
315 resp = cpu_to_le16(WLAN_REASON_PREV_AUTH_NOT_VALID);
316
317 /* deauth message sent; try to resend it few times; the message is
318 * broadcast, so it may be delayed until next DTIM; there is not much
319 * else we can do at this point since the driver is going to be shut
320 * down */
321 for (i = 0; i < 5; i++) {
322 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT |
323 IEEE80211_STYPE_DEAUTH,
324 (char *) &resp, 2, addr, 0);
325
326 if (!resend || ap->num_sta <= 0)
327 return;
328
329 mdelay(50);
330 }
331 }
332
333
ap_control_proc_show(struct seq_file * m,void * v)334 static int ap_control_proc_show(struct seq_file *m, void *v)
335 {
336 struct ap_data *ap = m->private;
337 char *policy_txt;
338 struct mac_entry *entry;
339
340 if (v == SEQ_START_TOKEN) {
341 switch (ap->mac_restrictions.policy) {
342 case MAC_POLICY_OPEN:
343 policy_txt = "open";
344 break;
345 case MAC_POLICY_ALLOW:
346 policy_txt = "allow";
347 break;
348 case MAC_POLICY_DENY:
349 policy_txt = "deny";
350 break;
351 default:
352 policy_txt = "unknown";
353 break;
354 }
355 seq_printf(m, "MAC policy: %s\n", policy_txt);
356 seq_printf(m, "MAC entries: %u\n", ap->mac_restrictions.entries);
357 seq_puts(m, "MAC list:\n");
358 return 0;
359 }
360
361 entry = v;
362 seq_printf(m, "%pM\n", entry->addr);
363 return 0;
364 }
365
ap_control_proc_start(struct seq_file * m,loff_t * _pos)366 static void *ap_control_proc_start(struct seq_file *m, loff_t *_pos)
367 {
368 struct ap_data *ap = m->private;
369 spin_lock_bh(&ap->mac_restrictions.lock);
370 return seq_list_start_head(&ap->mac_restrictions.mac_list, *_pos);
371 }
372
ap_control_proc_next(struct seq_file * m,void * v,loff_t * _pos)373 static void *ap_control_proc_next(struct seq_file *m, void *v, loff_t *_pos)
374 {
375 struct ap_data *ap = m->private;
376 return seq_list_next(v, &ap->mac_restrictions.mac_list, _pos);
377 }
378
ap_control_proc_stop(struct seq_file * m,void * v)379 static void ap_control_proc_stop(struct seq_file *m, void *v)
380 {
381 struct ap_data *ap = m->private;
382 spin_unlock_bh(&ap->mac_restrictions.lock);
383 }
384
385 static const struct seq_operations ap_control_proc_seqops = {
386 .start = ap_control_proc_start,
387 .next = ap_control_proc_next,
388 .stop = ap_control_proc_stop,
389 .show = ap_control_proc_show,
390 };
391
ap_control_proc_open(struct inode * inode,struct file * file)392 static int ap_control_proc_open(struct inode *inode, struct file *file)
393 {
394 int ret = seq_open(file, &ap_control_proc_seqops);
395 if (ret == 0) {
396 struct seq_file *m = file->private_data;
397 m->private = PDE_DATA(inode);
398 }
399 return ret;
400 }
401
402 static const struct file_operations ap_control_proc_fops = {
403 .open = ap_control_proc_open,
404 .read = seq_read,
405 .llseek = seq_lseek,
406 .release = seq_release,
407 };
408
409
ap_control_add_mac(struct mac_restrictions * mac_restrictions,u8 * mac)410 int ap_control_add_mac(struct mac_restrictions *mac_restrictions, u8 *mac)
411 {
412 struct mac_entry *entry;
413
414 entry = kmalloc(sizeof(struct mac_entry), GFP_KERNEL);
415 if (entry == NULL)
416 return -ENOMEM;
417
418 memcpy(entry->addr, mac, ETH_ALEN);
419
420 spin_lock_bh(&mac_restrictions->lock);
421 list_add_tail(&entry->list, &mac_restrictions->mac_list);
422 mac_restrictions->entries++;
423 spin_unlock_bh(&mac_restrictions->lock);
424
425 return 0;
426 }
427
428
ap_control_del_mac(struct mac_restrictions * mac_restrictions,u8 * mac)429 int ap_control_del_mac(struct mac_restrictions *mac_restrictions, u8 *mac)
430 {
431 struct list_head *ptr;
432 struct mac_entry *entry;
433
434 spin_lock_bh(&mac_restrictions->lock);
435 for (ptr = mac_restrictions->mac_list.next;
436 ptr != &mac_restrictions->mac_list; ptr = ptr->next) {
437 entry = list_entry(ptr, struct mac_entry, list);
438
439 if (ether_addr_equal(entry->addr, mac)) {
440 list_del(ptr);
441 kfree(entry);
442 mac_restrictions->entries--;
443 spin_unlock_bh(&mac_restrictions->lock);
444 return 0;
445 }
446 }
447 spin_unlock_bh(&mac_restrictions->lock);
448 return -1;
449 }
450
451
ap_control_mac_deny(struct mac_restrictions * mac_restrictions,u8 * mac)452 static int ap_control_mac_deny(struct mac_restrictions *mac_restrictions,
453 u8 *mac)
454 {
455 struct mac_entry *entry;
456 int found = 0;
457
458 if (mac_restrictions->policy == MAC_POLICY_OPEN)
459 return 0;
460
461 spin_lock_bh(&mac_restrictions->lock);
462 list_for_each_entry(entry, &mac_restrictions->mac_list, list) {
463 if (ether_addr_equal(entry->addr, mac)) {
464 found = 1;
465 break;
466 }
467 }
468 spin_unlock_bh(&mac_restrictions->lock);
469
470 if (mac_restrictions->policy == MAC_POLICY_ALLOW)
471 return !found;
472 else
473 return found;
474 }
475
476
ap_control_flush_macs(struct mac_restrictions * mac_restrictions)477 void ap_control_flush_macs(struct mac_restrictions *mac_restrictions)
478 {
479 struct list_head *ptr, *n;
480 struct mac_entry *entry;
481
482 if (mac_restrictions->entries == 0)
483 return;
484
485 spin_lock_bh(&mac_restrictions->lock);
486 for (ptr = mac_restrictions->mac_list.next, n = ptr->next;
487 ptr != &mac_restrictions->mac_list;
488 ptr = n, n = ptr->next) {
489 entry = list_entry(ptr, struct mac_entry, list);
490 list_del(ptr);
491 kfree(entry);
492 }
493 mac_restrictions->entries = 0;
494 spin_unlock_bh(&mac_restrictions->lock);
495 }
496
497
ap_control_kick_mac(struct ap_data * ap,struct net_device * dev,u8 * mac)498 int ap_control_kick_mac(struct ap_data *ap, struct net_device *dev, u8 *mac)
499 {
500 struct sta_info *sta;
501 __le16 resp;
502
503 spin_lock_bh(&ap->sta_table_lock);
504 sta = ap_get_sta(ap, mac);
505 if (sta) {
506 ap_sta_hash_del(ap, sta);
507 list_del(&sta->list);
508 }
509 spin_unlock_bh(&ap->sta_table_lock);
510
511 if (!sta)
512 return -EINVAL;
513
514 resp = cpu_to_le16(WLAN_REASON_PREV_AUTH_NOT_VALID);
515 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_DEAUTH,
516 (char *) &resp, 2, sta->addr, 0);
517
518 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap)
519 hostap_event_expired_sta(dev, sta);
520
521 ap_free_sta(ap, sta);
522
523 return 0;
524 }
525
526 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
527
528
ap_control_kickall(struct ap_data * ap)529 void ap_control_kickall(struct ap_data *ap)
530 {
531 struct list_head *ptr, *n;
532 struct sta_info *sta;
533
534 spin_lock_bh(&ap->sta_table_lock);
535 for (ptr = ap->sta_list.next, n = ptr->next; ptr != &ap->sta_list;
536 ptr = n, n = ptr->next) {
537 sta = list_entry(ptr, struct sta_info, list);
538 ap_sta_hash_del(ap, sta);
539 list_del(&sta->list);
540 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
541 hostap_event_expired_sta(sta->local->dev, sta);
542 ap_free_sta(ap, sta);
543 }
544 spin_unlock_bh(&ap->sta_table_lock);
545 }
546
547
548 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
549
prism2_ap_proc_show(struct seq_file * m,void * v)550 static int prism2_ap_proc_show(struct seq_file *m, void *v)
551 {
552 struct sta_info *sta = v;
553 int i;
554
555 if (v == SEQ_START_TOKEN) {
556 seq_printf(m, "# BSSID CHAN SIGNAL NOISE RATE SSID FLAGS\n");
557 return 0;
558 }
559
560 if (!sta->ap)
561 return 0;
562
563 seq_printf(m, "%pM %d %d %d %d '",
564 sta->addr,
565 sta->u.ap.channel, sta->last_rx_signal,
566 sta->last_rx_silence, sta->last_rx_rate);
567
568 for (i = 0; i < sta->u.ap.ssid_len; i++) {
569 if (sta->u.ap.ssid[i] >= 32 && sta->u.ap.ssid[i] < 127)
570 seq_putc(m, sta->u.ap.ssid[i]);
571 else
572 seq_printf(m, "<%02x>", sta->u.ap.ssid[i]);
573 }
574
575 seq_putc(m, '\'');
576 if (sta->capability & WLAN_CAPABILITY_ESS)
577 seq_puts(m, " [ESS]");
578 if (sta->capability & WLAN_CAPABILITY_IBSS)
579 seq_puts(m, " [IBSS]");
580 if (sta->capability & WLAN_CAPABILITY_PRIVACY)
581 seq_puts(m, " [WEP]");
582 seq_putc(m, '\n');
583 return 0;
584 }
585
prism2_ap_proc_start(struct seq_file * m,loff_t * _pos)586 static void *prism2_ap_proc_start(struct seq_file *m, loff_t *_pos)
587 {
588 struct ap_data *ap = m->private;
589 spin_lock_bh(&ap->sta_table_lock);
590 return seq_list_start_head(&ap->sta_list, *_pos);
591 }
592
prism2_ap_proc_next(struct seq_file * m,void * v,loff_t * _pos)593 static void *prism2_ap_proc_next(struct seq_file *m, void *v, loff_t *_pos)
594 {
595 struct ap_data *ap = m->private;
596 return seq_list_next(v, &ap->sta_list, _pos);
597 }
598
prism2_ap_proc_stop(struct seq_file * m,void * v)599 static void prism2_ap_proc_stop(struct seq_file *m, void *v)
600 {
601 struct ap_data *ap = m->private;
602 spin_unlock_bh(&ap->sta_table_lock);
603 }
604
605 static const struct seq_operations prism2_ap_proc_seqops = {
606 .start = prism2_ap_proc_start,
607 .next = prism2_ap_proc_next,
608 .stop = prism2_ap_proc_stop,
609 .show = prism2_ap_proc_show,
610 };
611
prism2_ap_proc_open(struct inode * inode,struct file * file)612 static int prism2_ap_proc_open(struct inode *inode, struct file *file)
613 {
614 int ret = seq_open(file, &prism2_ap_proc_seqops);
615 if (ret == 0) {
616 struct seq_file *m = file->private_data;
617 m->private = PDE_DATA(inode);
618 }
619 return ret;
620 }
621
622 static const struct file_operations prism2_ap_proc_fops = {
623 .open = prism2_ap_proc_open,
624 .read = seq_read,
625 .llseek = seq_lseek,
626 .release = seq_release,
627 };
628 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
629
630
hostap_check_sta_fw_version(struct ap_data * ap,int sta_fw_ver)631 void hostap_check_sta_fw_version(struct ap_data *ap, int sta_fw_ver)
632 {
633 if (!ap)
634 return;
635
636 if (sta_fw_ver == PRISM2_FW_VER(0,8,0)) {
637 PDEBUG(DEBUG_AP, "Using data::nullfunc ACK workaround - "
638 "firmware upgrade recommended\n");
639 ap->nullfunc_ack = 1;
640 } else
641 ap->nullfunc_ack = 0;
642
643 if (sta_fw_ver == PRISM2_FW_VER(1,4,2)) {
644 printk(KERN_WARNING "%s: Warning: secondary station firmware "
645 "version 1.4.2 does not seem to work in Host AP mode\n",
646 ap->local->dev->name);
647 }
648 }
649
650
651 /* Called only as a tasklet (software IRQ) */
hostap_ap_tx_cb(struct sk_buff * skb,int ok,void * data)652 static void hostap_ap_tx_cb(struct sk_buff *skb, int ok, void *data)
653 {
654 struct ap_data *ap = data;
655 struct ieee80211_hdr *hdr;
656
657 if (!ap->local->hostapd || !ap->local->apdev) {
658 dev_kfree_skb(skb);
659 return;
660 }
661
662 /* Pass the TX callback frame to the hostapd; use 802.11 header version
663 * 1 to indicate failure (no ACK) and 2 success (frame ACKed) */
664
665 hdr = (struct ieee80211_hdr *) skb->data;
666 hdr->frame_control &= cpu_to_le16(~IEEE80211_FCTL_VERS);
667 hdr->frame_control |= cpu_to_le16(ok ? BIT(1) : BIT(0));
668
669 skb->dev = ap->local->apdev;
670 skb_pull(skb, hostap_80211_get_hdrlen(hdr->frame_control));
671 skb->pkt_type = PACKET_OTHERHOST;
672 skb->protocol = cpu_to_be16(ETH_P_802_2);
673 memset(skb->cb, 0, sizeof(skb->cb));
674 netif_rx(skb);
675 }
676
677
678 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
679 /* Called only as a tasklet (software IRQ) */
hostap_ap_tx_cb_auth(struct sk_buff * skb,int ok,void * data)680 static void hostap_ap_tx_cb_auth(struct sk_buff *skb, int ok, void *data)
681 {
682 struct ap_data *ap = data;
683 struct net_device *dev = ap->local->dev;
684 struct ieee80211_hdr *hdr;
685 u16 auth_alg, auth_transaction, status;
686 __le16 *pos;
687 struct sta_info *sta = NULL;
688 char *txt = NULL;
689
690 if (ap->local->hostapd) {
691 dev_kfree_skb(skb);
692 return;
693 }
694
695 hdr = (struct ieee80211_hdr *) skb->data;
696 if (!ieee80211_is_auth(hdr->frame_control) ||
697 skb->len < IEEE80211_MGMT_HDR_LEN + 6) {
698 printk(KERN_DEBUG "%s: hostap_ap_tx_cb_auth received invalid "
699 "frame\n", dev->name);
700 dev_kfree_skb(skb);
701 return;
702 }
703
704 pos = (__le16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
705 auth_alg = le16_to_cpu(*pos++);
706 auth_transaction = le16_to_cpu(*pos++);
707 status = le16_to_cpu(*pos++);
708
709 if (!ok) {
710 txt = "frame was not ACKed";
711 goto done;
712 }
713
714 spin_lock(&ap->sta_table_lock);
715 sta = ap_get_sta(ap, hdr->addr1);
716 if (sta)
717 atomic_inc(&sta->users);
718 spin_unlock(&ap->sta_table_lock);
719
720 if (!sta) {
721 txt = "STA not found";
722 goto done;
723 }
724
725 if (status == WLAN_STATUS_SUCCESS &&
726 ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 2) ||
727 (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 4))) {
728 txt = "STA authenticated";
729 sta->flags |= WLAN_STA_AUTH;
730 sta->last_auth = jiffies;
731 } else if (status != WLAN_STATUS_SUCCESS)
732 txt = "authentication failed";
733
734 done:
735 if (sta)
736 atomic_dec(&sta->users);
737 if (txt) {
738 PDEBUG(DEBUG_AP, "%s: %pM auth_cb - alg=%d "
739 "trans#=%d status=%d - %s\n",
740 dev->name, hdr->addr1,
741 auth_alg, auth_transaction, status, txt);
742 }
743 dev_kfree_skb(skb);
744 }
745
746
747 /* Called only as a tasklet (software IRQ) */
hostap_ap_tx_cb_assoc(struct sk_buff * skb,int ok,void * data)748 static void hostap_ap_tx_cb_assoc(struct sk_buff *skb, int ok, void *data)
749 {
750 struct ap_data *ap = data;
751 struct net_device *dev = ap->local->dev;
752 struct ieee80211_hdr *hdr;
753 u16 status;
754 __le16 *pos;
755 struct sta_info *sta = NULL;
756 char *txt = NULL;
757
758 if (ap->local->hostapd) {
759 dev_kfree_skb(skb);
760 return;
761 }
762
763 hdr = (struct ieee80211_hdr *) skb->data;
764 if ((!ieee80211_is_assoc_resp(hdr->frame_control) &&
765 !ieee80211_is_reassoc_resp(hdr->frame_control)) ||
766 skb->len < IEEE80211_MGMT_HDR_LEN + 4) {
767 printk(KERN_DEBUG "%s: hostap_ap_tx_cb_assoc received invalid "
768 "frame\n", dev->name);
769 dev_kfree_skb(skb);
770 return;
771 }
772
773 if (!ok) {
774 txt = "frame was not ACKed";
775 goto done;
776 }
777
778 spin_lock(&ap->sta_table_lock);
779 sta = ap_get_sta(ap, hdr->addr1);
780 if (sta)
781 atomic_inc(&sta->users);
782 spin_unlock(&ap->sta_table_lock);
783
784 if (!sta) {
785 txt = "STA not found";
786 goto done;
787 }
788
789 pos = (__le16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
790 pos++;
791 status = le16_to_cpu(*pos++);
792 if (status == WLAN_STATUS_SUCCESS) {
793 if (!(sta->flags & WLAN_STA_ASSOC))
794 hostap_event_new_sta(dev, sta);
795 txt = "STA associated";
796 sta->flags |= WLAN_STA_ASSOC;
797 sta->last_assoc = jiffies;
798 } else
799 txt = "association failed";
800
801 done:
802 if (sta)
803 atomic_dec(&sta->users);
804 if (txt) {
805 PDEBUG(DEBUG_AP, "%s: %pM assoc_cb - %s\n",
806 dev->name, hdr->addr1, txt);
807 }
808 dev_kfree_skb(skb);
809 }
810
811 /* Called only as a tasklet (software IRQ); TX callback for poll frames used
812 * in verifying whether the STA is still present. */
hostap_ap_tx_cb_poll(struct sk_buff * skb,int ok,void * data)813 static void hostap_ap_tx_cb_poll(struct sk_buff *skb, int ok, void *data)
814 {
815 struct ap_data *ap = data;
816 struct ieee80211_hdr *hdr;
817 struct sta_info *sta;
818
819 if (skb->len < 24)
820 goto fail;
821 hdr = (struct ieee80211_hdr *) skb->data;
822 if (ok) {
823 spin_lock(&ap->sta_table_lock);
824 sta = ap_get_sta(ap, hdr->addr1);
825 if (sta)
826 sta->flags &= ~WLAN_STA_PENDING_POLL;
827 spin_unlock(&ap->sta_table_lock);
828 } else {
829 PDEBUG(DEBUG_AP,
830 "%s: STA %pM did not ACK activity poll frame\n",
831 ap->local->dev->name, hdr->addr1);
832 }
833
834 fail:
835 dev_kfree_skb(skb);
836 }
837 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
838
839
hostap_init_data(local_info_t * local)840 void hostap_init_data(local_info_t *local)
841 {
842 struct ap_data *ap = local->ap;
843
844 if (ap == NULL) {
845 printk(KERN_WARNING "hostap_init_data: ap == NULL\n");
846 return;
847 }
848 memset(ap, 0, sizeof(struct ap_data));
849 ap->local = local;
850
851 ap->ap_policy = GET_INT_PARM(other_ap_policy, local->card_idx);
852 ap->bridge_packets = GET_INT_PARM(ap_bridge_packets, local->card_idx);
853 ap->max_inactivity =
854 GET_INT_PARM(ap_max_inactivity, local->card_idx) * HZ;
855 ap->autom_ap_wds = GET_INT_PARM(autom_ap_wds, local->card_idx);
856
857 spin_lock_init(&ap->sta_table_lock);
858 INIT_LIST_HEAD(&ap->sta_list);
859
860 /* Initialize task queue structure for AP management */
861 INIT_WORK(&local->ap->add_sta_proc_queue, handle_add_proc_queue);
862
863 ap->tx_callback_idx =
864 hostap_tx_callback_register(local, hostap_ap_tx_cb, ap);
865 if (ap->tx_callback_idx == 0)
866 printk(KERN_WARNING "%s: failed to register TX callback for "
867 "AP\n", local->dev->name);
868 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
869 INIT_WORK(&local->ap->wds_oper_queue, handle_wds_oper_queue);
870
871 ap->tx_callback_auth =
872 hostap_tx_callback_register(local, hostap_ap_tx_cb_auth, ap);
873 ap->tx_callback_assoc =
874 hostap_tx_callback_register(local, hostap_ap_tx_cb_assoc, ap);
875 ap->tx_callback_poll =
876 hostap_tx_callback_register(local, hostap_ap_tx_cb_poll, ap);
877 if (ap->tx_callback_auth == 0 || ap->tx_callback_assoc == 0 ||
878 ap->tx_callback_poll == 0)
879 printk(KERN_WARNING "%s: failed to register TX callback for "
880 "AP\n", local->dev->name);
881
882 spin_lock_init(&ap->mac_restrictions.lock);
883 INIT_LIST_HEAD(&ap->mac_restrictions.mac_list);
884 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
885
886 ap->initialized = 1;
887 }
888
889
hostap_init_ap_proc(local_info_t * local)890 void hostap_init_ap_proc(local_info_t *local)
891 {
892 struct ap_data *ap = local->ap;
893
894 ap->proc = local->proc;
895 if (ap->proc == NULL)
896 return;
897
898 #ifndef PRISM2_NO_PROCFS_DEBUG
899 proc_create_data("ap_debug", 0, ap->proc, &ap_debug_proc_fops, ap);
900 #endif /* PRISM2_NO_PROCFS_DEBUG */
901
902 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
903 proc_create_data("ap_control", 0, ap->proc, &ap_control_proc_fops, ap);
904 proc_create_data("ap", 0, ap->proc, &prism2_ap_proc_fops, ap);
905 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
906
907 }
908
909
hostap_free_data(struct ap_data * ap)910 void hostap_free_data(struct ap_data *ap)
911 {
912 struct sta_info *n, *sta;
913
914 if (ap == NULL || !ap->initialized) {
915 printk(KERN_DEBUG "hostap_free_data: ap has not yet been "
916 "initialized - skip resource freeing\n");
917 return;
918 }
919
920 flush_work(&ap->add_sta_proc_queue);
921
922 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
923 flush_work(&ap->wds_oper_queue);
924 if (ap->crypt)
925 ap->crypt->deinit(ap->crypt_priv);
926 ap->crypt = ap->crypt_priv = NULL;
927 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
928
929 list_for_each_entry_safe(sta, n, &ap->sta_list, list) {
930 ap_sta_hash_del(ap, sta);
931 list_del(&sta->list);
932 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
933 hostap_event_expired_sta(sta->local->dev, sta);
934 ap_free_sta(ap, sta);
935 }
936
937 #ifndef PRISM2_NO_PROCFS_DEBUG
938 if (ap->proc != NULL) {
939 remove_proc_entry("ap_debug", ap->proc);
940 }
941 #endif /* PRISM2_NO_PROCFS_DEBUG */
942
943 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
944 if (ap->proc != NULL) {
945 remove_proc_entry("ap", ap->proc);
946 remove_proc_entry("ap_control", ap->proc);
947 }
948 ap_control_flush_macs(&ap->mac_restrictions);
949 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
950
951 ap->initialized = 0;
952 }
953
954
955 /* caller should have mutex for AP STA list handling */
ap_get_sta(struct ap_data * ap,u8 * sta)956 static struct sta_info* ap_get_sta(struct ap_data *ap, u8 *sta)
957 {
958 struct sta_info *s;
959
960 s = ap->sta_hash[STA_HASH(sta)];
961 while (s != NULL && !ether_addr_equal(s->addr, sta))
962 s = s->hnext;
963 return s;
964 }
965
966
967 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
968
969 /* Called from timer handler and from scheduled AP queue handlers */
prism2_send_mgmt(struct net_device * dev,u16 type_subtype,char * body,int body_len,u8 * addr,u16 tx_cb_idx)970 static void prism2_send_mgmt(struct net_device *dev,
971 u16 type_subtype, char *body,
972 int body_len, u8 *addr, u16 tx_cb_idx)
973 {
974 struct hostap_interface *iface;
975 local_info_t *local;
976 struct ieee80211_hdr *hdr;
977 u16 fc;
978 struct sk_buff *skb;
979 struct hostap_skb_tx_data *meta;
980 int hdrlen;
981
982 iface = netdev_priv(dev);
983 local = iface->local;
984 dev = local->dev; /* always use master radio device */
985 iface = netdev_priv(dev);
986
987 if (!(dev->flags & IFF_UP)) {
988 PDEBUG(DEBUG_AP, "%s: prism2_send_mgmt - device is not UP - "
989 "cannot send frame\n", dev->name);
990 return;
991 }
992
993 skb = dev_alloc_skb(sizeof(*hdr) + body_len);
994 if (skb == NULL) {
995 PDEBUG(DEBUG_AP, "%s: prism2_send_mgmt failed to allocate "
996 "skb\n", dev->name);
997 return;
998 }
999
1000 fc = type_subtype;
1001 hdrlen = hostap_80211_get_hdrlen(cpu_to_le16(type_subtype));
1002 hdr = skb_put_zero(skb, hdrlen);
1003 if (body)
1004 skb_put_data(skb, body, body_len);
1005
1006 /* FIX: ctrl::ack sending used special HFA384X_TX_CTRL_802_11
1007 * tx_control instead of using local->tx_control */
1008
1009
1010 memcpy(hdr->addr1, addr, ETH_ALEN); /* DA / RA */
1011 if (ieee80211_is_data(hdr->frame_control)) {
1012 fc |= IEEE80211_FCTL_FROMDS;
1013 memcpy(hdr->addr2, dev->dev_addr, ETH_ALEN); /* BSSID */
1014 memcpy(hdr->addr3, dev->dev_addr, ETH_ALEN); /* SA */
1015 } else if (ieee80211_is_ctl(hdr->frame_control)) {
1016 /* control:ACK does not have addr2 or addr3 */
1017 eth_zero_addr(hdr->addr2);
1018 eth_zero_addr(hdr->addr3);
1019 } else {
1020 memcpy(hdr->addr2, dev->dev_addr, ETH_ALEN); /* SA */
1021 memcpy(hdr->addr3, dev->dev_addr, ETH_ALEN); /* BSSID */
1022 }
1023
1024 hdr->frame_control = cpu_to_le16(fc);
1025
1026 meta = (struct hostap_skb_tx_data *) skb->cb;
1027 memset(meta, 0, sizeof(*meta));
1028 meta->magic = HOSTAP_SKB_TX_DATA_MAGIC;
1029 meta->iface = iface;
1030 meta->tx_cb_idx = tx_cb_idx;
1031
1032 skb->dev = dev;
1033 skb_reset_mac_header(skb);
1034 skb_reset_network_header(skb);
1035 dev_queue_xmit(skb);
1036 }
1037 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1038
1039
prism2_sta_proc_show(struct seq_file * m,void * v)1040 static int prism2_sta_proc_show(struct seq_file *m, void *v)
1041 {
1042 struct sta_info *sta = m->private;
1043 int i;
1044
1045 /* FIX: possible race condition.. the STA data could have just expired,
1046 * but proc entry was still here so that the read could have started;
1047 * some locking should be done here.. */
1048
1049 seq_printf(m,
1050 "%s=%pM\nusers=%d\naid=%d\n"
1051 "flags=0x%04x%s%s%s%s%s%s%s\n"
1052 "capability=0x%02x\nlisten_interval=%d\nsupported_rates=",
1053 sta->ap ? "AP" : "STA",
1054 sta->addr, atomic_read(&sta->users), sta->aid,
1055 sta->flags,
1056 sta->flags & WLAN_STA_AUTH ? " AUTH" : "",
1057 sta->flags & WLAN_STA_ASSOC ? " ASSOC" : "",
1058 sta->flags & WLAN_STA_PS ? " PS" : "",
1059 sta->flags & WLAN_STA_TIM ? " TIM" : "",
1060 sta->flags & WLAN_STA_PERM ? " PERM" : "",
1061 sta->flags & WLAN_STA_AUTHORIZED ? " AUTHORIZED" : "",
1062 sta->flags & WLAN_STA_PENDING_POLL ? " POLL" : "",
1063 sta->capability, sta->listen_interval);
1064 /* supported_rates: 500 kbit/s units with msb ignored */
1065 for (i = 0; i < sizeof(sta->supported_rates); i++)
1066 if (sta->supported_rates[i] != 0)
1067 seq_printf(m, "%d%sMbps ",
1068 (sta->supported_rates[i] & 0x7f) / 2,
1069 sta->supported_rates[i] & 1 ? ".5" : "");
1070 seq_printf(m,
1071 "\njiffies=%lu\nlast_auth=%lu\nlast_assoc=%lu\n"
1072 "last_rx=%lu\nlast_tx=%lu\nrx_packets=%lu\n"
1073 "tx_packets=%lu\n"
1074 "rx_bytes=%lu\ntx_bytes=%lu\nbuffer_count=%d\n"
1075 "last_rx: silence=%d dBm signal=%d dBm rate=%d%s Mbps\n"
1076 "tx_rate=%d\ntx[1M]=%d\ntx[2M]=%d\ntx[5.5M]=%d\n"
1077 "tx[11M]=%d\n"
1078 "rx[1M]=%d\nrx[2M]=%d\nrx[5.5M]=%d\nrx[11M]=%d\n",
1079 jiffies, sta->last_auth, sta->last_assoc, sta->last_rx,
1080 sta->last_tx,
1081 sta->rx_packets, sta->tx_packets, sta->rx_bytes,
1082 sta->tx_bytes, skb_queue_len(&sta->tx_buf),
1083 sta->last_rx_silence,
1084 sta->last_rx_signal, sta->last_rx_rate / 10,
1085 sta->last_rx_rate % 10 ? ".5" : "",
1086 sta->tx_rate, sta->tx_count[0], sta->tx_count[1],
1087 sta->tx_count[2], sta->tx_count[3], sta->rx_count[0],
1088 sta->rx_count[1], sta->rx_count[2], sta->rx_count[3]);
1089 if (sta->crypt && sta->crypt->ops && sta->crypt->ops->print_stats)
1090 sta->crypt->ops->print_stats(m, sta->crypt->priv);
1091 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1092 if (sta->ap) {
1093 if (sta->u.ap.channel >= 0)
1094 seq_printf(m, "channel=%d\n", sta->u.ap.channel);
1095 seq_puts(m, "ssid=");
1096 for (i = 0; i < sta->u.ap.ssid_len; i++) {
1097 if (sta->u.ap.ssid[i] >= 32 && sta->u.ap.ssid[i] < 127)
1098 seq_putc(m, sta->u.ap.ssid[i]);
1099 else
1100 seq_printf(m, "<%02x>", sta->u.ap.ssid[i]);
1101 }
1102 seq_putc(m, '\n');
1103 }
1104 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1105
1106 return 0;
1107 }
1108
prism2_sta_proc_open(struct inode * inode,struct file * file)1109 static int prism2_sta_proc_open(struct inode *inode, struct file *file)
1110 {
1111 return single_open(file, prism2_sta_proc_show, PDE_DATA(inode));
1112 }
1113
1114 static const struct file_operations prism2_sta_proc_fops = {
1115 .open = prism2_sta_proc_open,
1116 .read = seq_read,
1117 .llseek = seq_lseek,
1118 .release = single_release,
1119 };
1120
handle_add_proc_queue(struct work_struct * work)1121 static void handle_add_proc_queue(struct work_struct *work)
1122 {
1123 struct ap_data *ap = container_of(work, struct ap_data,
1124 add_sta_proc_queue);
1125 struct sta_info *sta;
1126 char name[20];
1127 struct add_sta_proc_data *entry, *prev;
1128
1129 entry = ap->add_sta_proc_entries;
1130 ap->add_sta_proc_entries = NULL;
1131
1132 while (entry) {
1133 spin_lock_bh(&ap->sta_table_lock);
1134 sta = ap_get_sta(ap, entry->addr);
1135 if (sta)
1136 atomic_inc(&sta->users);
1137 spin_unlock_bh(&ap->sta_table_lock);
1138
1139 if (sta) {
1140 sprintf(name, "%pM", sta->addr);
1141 sta->proc = proc_create_data(
1142 name, 0, ap->proc,
1143 &prism2_sta_proc_fops, sta);
1144
1145 atomic_dec(&sta->users);
1146 }
1147
1148 prev = entry;
1149 entry = entry->next;
1150 kfree(prev);
1151 }
1152 }
1153
1154
ap_add_sta(struct ap_data * ap,u8 * addr)1155 static struct sta_info * ap_add_sta(struct ap_data *ap, u8 *addr)
1156 {
1157 struct sta_info *sta;
1158
1159 sta = kzalloc(sizeof(struct sta_info), GFP_ATOMIC);
1160 if (sta == NULL) {
1161 PDEBUG(DEBUG_AP, "AP: kmalloc failed\n");
1162 return NULL;
1163 }
1164
1165 /* initialize STA info data */
1166 sta->local = ap->local;
1167 skb_queue_head_init(&sta->tx_buf);
1168 memcpy(sta->addr, addr, ETH_ALEN);
1169
1170 atomic_inc(&sta->users);
1171 spin_lock_bh(&ap->sta_table_lock);
1172 list_add(&sta->list, &ap->sta_list);
1173 ap->num_sta++;
1174 ap_sta_hash_add(ap, sta);
1175 spin_unlock_bh(&ap->sta_table_lock);
1176
1177 if (ap->proc) {
1178 struct add_sta_proc_data *entry;
1179 /* schedule a non-interrupt context process to add a procfs
1180 * entry for the STA since procfs code use GFP_KERNEL */
1181 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
1182 if (entry) {
1183 memcpy(entry->addr, sta->addr, ETH_ALEN);
1184 entry->next = ap->add_sta_proc_entries;
1185 ap->add_sta_proc_entries = entry;
1186 schedule_work(&ap->add_sta_proc_queue);
1187 } else
1188 printk(KERN_DEBUG "Failed to add STA proc data\n");
1189 }
1190
1191 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1192 init_timer(&sta->timer);
1193 sta->timer.expires = jiffies + ap->max_inactivity;
1194 sta->timer.data = (unsigned long) sta;
1195 sta->timer.function = ap_handle_timer;
1196 if (!ap->local->hostapd)
1197 add_timer(&sta->timer);
1198 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1199
1200 return sta;
1201 }
1202
1203
ap_tx_rate_ok(int rateidx,struct sta_info * sta,local_info_t * local)1204 static int ap_tx_rate_ok(int rateidx, struct sta_info *sta,
1205 local_info_t *local)
1206 {
1207 if (rateidx > sta->tx_max_rate ||
1208 !(sta->tx_supp_rates & (1 << rateidx)))
1209 return 0;
1210
1211 if (local->tx_rate_control != 0 &&
1212 !(local->tx_rate_control & (1 << rateidx)))
1213 return 0;
1214
1215 return 1;
1216 }
1217
1218
prism2_check_tx_rates(struct sta_info * sta)1219 static void prism2_check_tx_rates(struct sta_info *sta)
1220 {
1221 int i;
1222
1223 sta->tx_supp_rates = 0;
1224 for (i = 0; i < sizeof(sta->supported_rates); i++) {
1225 if ((sta->supported_rates[i] & 0x7f) == 2)
1226 sta->tx_supp_rates |= WLAN_RATE_1M;
1227 if ((sta->supported_rates[i] & 0x7f) == 4)
1228 sta->tx_supp_rates |= WLAN_RATE_2M;
1229 if ((sta->supported_rates[i] & 0x7f) == 11)
1230 sta->tx_supp_rates |= WLAN_RATE_5M5;
1231 if ((sta->supported_rates[i] & 0x7f) == 22)
1232 sta->tx_supp_rates |= WLAN_RATE_11M;
1233 }
1234 sta->tx_max_rate = sta->tx_rate = sta->tx_rate_idx = 0;
1235 if (sta->tx_supp_rates & WLAN_RATE_1M) {
1236 sta->tx_max_rate = 0;
1237 if (ap_tx_rate_ok(0, sta, sta->local)) {
1238 sta->tx_rate = 10;
1239 sta->tx_rate_idx = 0;
1240 }
1241 }
1242 if (sta->tx_supp_rates & WLAN_RATE_2M) {
1243 sta->tx_max_rate = 1;
1244 if (ap_tx_rate_ok(1, sta, sta->local)) {
1245 sta->tx_rate = 20;
1246 sta->tx_rate_idx = 1;
1247 }
1248 }
1249 if (sta->tx_supp_rates & WLAN_RATE_5M5) {
1250 sta->tx_max_rate = 2;
1251 if (ap_tx_rate_ok(2, sta, sta->local)) {
1252 sta->tx_rate = 55;
1253 sta->tx_rate_idx = 2;
1254 }
1255 }
1256 if (sta->tx_supp_rates & WLAN_RATE_11M) {
1257 sta->tx_max_rate = 3;
1258 if (ap_tx_rate_ok(3, sta, sta->local)) {
1259 sta->tx_rate = 110;
1260 sta->tx_rate_idx = 3;
1261 }
1262 }
1263 }
1264
1265
1266 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1267
ap_crypt_init(struct ap_data * ap)1268 static void ap_crypt_init(struct ap_data *ap)
1269 {
1270 ap->crypt = lib80211_get_crypto_ops("WEP");
1271
1272 if (ap->crypt) {
1273 if (ap->crypt->init) {
1274 ap->crypt_priv = ap->crypt->init(0);
1275 if (ap->crypt_priv == NULL)
1276 ap->crypt = NULL;
1277 else {
1278 u8 key[WEP_KEY_LEN];
1279 get_random_bytes(key, WEP_KEY_LEN);
1280 ap->crypt->set_key(key, WEP_KEY_LEN, NULL,
1281 ap->crypt_priv);
1282 }
1283 }
1284 }
1285
1286 if (ap->crypt == NULL) {
1287 printk(KERN_WARNING "AP could not initialize WEP: load module "
1288 "lib80211_crypt_wep.ko\n");
1289 }
1290 }
1291
1292
1293 /* Generate challenge data for shared key authentication. IEEE 802.11 specifies
1294 * that WEP algorithm is used for generating challenge. This should be unique,
1295 * but otherwise there is not really need for randomness etc. Initialize WEP
1296 * with pseudo random key and then use increasing IV to get unique challenge
1297 * streams.
1298 *
1299 * Called only as a scheduled task for pending AP frames.
1300 */
ap_auth_make_challenge(struct ap_data * ap)1301 static char * ap_auth_make_challenge(struct ap_data *ap)
1302 {
1303 char *tmpbuf;
1304 struct sk_buff *skb;
1305
1306 if (ap->crypt == NULL) {
1307 ap_crypt_init(ap);
1308 if (ap->crypt == NULL)
1309 return NULL;
1310 }
1311
1312 tmpbuf = kmalloc(WLAN_AUTH_CHALLENGE_LEN, GFP_ATOMIC);
1313 if (tmpbuf == NULL) {
1314 PDEBUG(DEBUG_AP, "AP: kmalloc failed for challenge\n");
1315 return NULL;
1316 }
1317
1318 skb = dev_alloc_skb(WLAN_AUTH_CHALLENGE_LEN +
1319 ap->crypt->extra_mpdu_prefix_len +
1320 ap->crypt->extra_mpdu_postfix_len);
1321 if (skb == NULL) {
1322 kfree(tmpbuf);
1323 return NULL;
1324 }
1325
1326 skb_reserve(skb, ap->crypt->extra_mpdu_prefix_len);
1327 skb_put_zero(skb, WLAN_AUTH_CHALLENGE_LEN);
1328 if (ap->crypt->encrypt_mpdu(skb, 0, ap->crypt_priv)) {
1329 dev_kfree_skb(skb);
1330 kfree(tmpbuf);
1331 return NULL;
1332 }
1333
1334 skb_copy_from_linear_data_offset(skb, ap->crypt->extra_mpdu_prefix_len,
1335 tmpbuf, WLAN_AUTH_CHALLENGE_LEN);
1336 dev_kfree_skb(skb);
1337
1338 return tmpbuf;
1339 }
1340
1341
1342 /* Called only as a scheduled task for pending AP frames. */
handle_authen(local_info_t * local,struct sk_buff * skb,struct hostap_80211_rx_status * rx_stats)1343 static void handle_authen(local_info_t *local, struct sk_buff *skb,
1344 struct hostap_80211_rx_status *rx_stats)
1345 {
1346 struct net_device *dev = local->dev;
1347 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1348 size_t hdrlen;
1349 struct ap_data *ap = local->ap;
1350 char body[8 + WLAN_AUTH_CHALLENGE_LEN], *challenge = NULL;
1351 int len, olen;
1352 u16 auth_alg, auth_transaction, status_code;
1353 __le16 *pos;
1354 u16 resp = WLAN_STATUS_SUCCESS;
1355 struct sta_info *sta = NULL;
1356 struct lib80211_crypt_data *crypt;
1357 char *txt = "";
1358
1359 len = skb->len - IEEE80211_MGMT_HDR_LEN;
1360
1361 hdrlen = hostap_80211_get_hdrlen(hdr->frame_control);
1362
1363 if (len < 6) {
1364 PDEBUG(DEBUG_AP, "%s: handle_authen - too short payload "
1365 "(len=%d) from %pM\n", dev->name, len, hdr->addr2);
1366 return;
1367 }
1368
1369 spin_lock_bh(&local->ap->sta_table_lock);
1370 sta = ap_get_sta(local->ap, hdr->addr2);
1371 if (sta)
1372 atomic_inc(&sta->users);
1373 spin_unlock_bh(&local->ap->sta_table_lock);
1374
1375 if (sta && sta->crypt)
1376 crypt = sta->crypt;
1377 else {
1378 int idx = 0;
1379 if (skb->len >= hdrlen + 3)
1380 idx = skb->data[hdrlen + 3] >> 6;
1381 crypt = local->crypt_info.crypt[idx];
1382 }
1383
1384 pos = (__le16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
1385 auth_alg = __le16_to_cpu(*pos);
1386 pos++;
1387 auth_transaction = __le16_to_cpu(*pos);
1388 pos++;
1389 status_code = __le16_to_cpu(*pos);
1390 pos++;
1391
1392 if (ether_addr_equal(dev->dev_addr, hdr->addr2) ||
1393 ap_control_mac_deny(&ap->mac_restrictions, hdr->addr2)) {
1394 txt = "authentication denied";
1395 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1396 goto fail;
1397 }
1398
1399 if (((local->auth_algs & PRISM2_AUTH_OPEN) &&
1400 auth_alg == WLAN_AUTH_OPEN) ||
1401 ((local->auth_algs & PRISM2_AUTH_SHARED_KEY) &&
1402 crypt && auth_alg == WLAN_AUTH_SHARED_KEY)) {
1403 } else {
1404 txt = "unsupported algorithm";
1405 resp = WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG;
1406 goto fail;
1407 }
1408
1409 if (len >= 8) {
1410 u8 *u = (u8 *) pos;
1411 if (*u == WLAN_EID_CHALLENGE) {
1412 if (*(u + 1) != WLAN_AUTH_CHALLENGE_LEN) {
1413 txt = "invalid challenge len";
1414 resp = WLAN_STATUS_CHALLENGE_FAIL;
1415 goto fail;
1416 }
1417 if (len - 8 < WLAN_AUTH_CHALLENGE_LEN) {
1418 txt = "challenge underflow";
1419 resp = WLAN_STATUS_CHALLENGE_FAIL;
1420 goto fail;
1421 }
1422 challenge = (char *) (u + 2);
1423 }
1424 }
1425
1426 if (sta && sta->ap) {
1427 if (time_after(jiffies, sta->u.ap.last_beacon +
1428 (10 * sta->listen_interval * HZ) / 1024)) {
1429 PDEBUG(DEBUG_AP, "%s: no beacons received for a while,"
1430 " assuming AP %pM is now STA\n",
1431 dev->name, sta->addr);
1432 sta->ap = 0;
1433 sta->flags = 0;
1434 sta->u.sta.challenge = NULL;
1435 } else {
1436 txt = "AP trying to authenticate?";
1437 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1438 goto fail;
1439 }
1440 }
1441
1442 if ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 1) ||
1443 (auth_alg == WLAN_AUTH_SHARED_KEY &&
1444 (auth_transaction == 1 ||
1445 (auth_transaction == 3 && sta != NULL &&
1446 sta->u.sta.challenge != NULL)))) {
1447 } else {
1448 txt = "unknown authentication transaction number";
1449 resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION;
1450 goto fail;
1451 }
1452
1453 if (sta == NULL) {
1454 txt = "new STA";
1455
1456 if (local->ap->num_sta >= MAX_STA_COUNT) {
1457 /* FIX: might try to remove some old STAs first? */
1458 txt = "no more room for new STAs";
1459 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1460 goto fail;
1461 }
1462
1463 sta = ap_add_sta(local->ap, hdr->addr2);
1464 if (sta == NULL) {
1465 txt = "ap_add_sta failed";
1466 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1467 goto fail;
1468 }
1469 }
1470
1471 switch (auth_alg) {
1472 case WLAN_AUTH_OPEN:
1473 txt = "authOK";
1474 /* IEEE 802.11 standard is not completely clear about
1475 * whether STA is considered authenticated after
1476 * authentication OK frame has been send or after it
1477 * has been ACKed. In order to reduce interoperability
1478 * issues, mark the STA authenticated before ACK. */
1479 sta->flags |= WLAN_STA_AUTH;
1480 break;
1481
1482 case WLAN_AUTH_SHARED_KEY:
1483 if (auth_transaction == 1) {
1484 if (sta->u.sta.challenge == NULL) {
1485 sta->u.sta.challenge =
1486 ap_auth_make_challenge(local->ap);
1487 if (sta->u.sta.challenge == NULL) {
1488 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1489 goto fail;
1490 }
1491 }
1492 } else {
1493 if (sta->u.sta.challenge == NULL ||
1494 challenge == NULL ||
1495 memcmp(sta->u.sta.challenge, challenge,
1496 WLAN_AUTH_CHALLENGE_LEN) != 0 ||
1497 !ieee80211_has_protected(hdr->frame_control)) {
1498 txt = "challenge response incorrect";
1499 resp = WLAN_STATUS_CHALLENGE_FAIL;
1500 goto fail;
1501 }
1502
1503 txt = "challenge OK - authOK";
1504 /* IEEE 802.11 standard is not completely clear about
1505 * whether STA is considered authenticated after
1506 * authentication OK frame has been send or after it
1507 * has been ACKed. In order to reduce interoperability
1508 * issues, mark the STA authenticated before ACK. */
1509 sta->flags |= WLAN_STA_AUTH;
1510 kfree(sta->u.sta.challenge);
1511 sta->u.sta.challenge = NULL;
1512 }
1513 break;
1514 }
1515
1516 fail:
1517 pos = (__le16 *) body;
1518 *pos = cpu_to_le16(auth_alg);
1519 pos++;
1520 *pos = cpu_to_le16(auth_transaction + 1);
1521 pos++;
1522 *pos = cpu_to_le16(resp); /* status_code */
1523 pos++;
1524 olen = 6;
1525
1526 if (resp == WLAN_STATUS_SUCCESS && sta != NULL &&
1527 sta->u.sta.challenge != NULL &&
1528 auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 1) {
1529 u8 *tmp = (u8 *) pos;
1530 *tmp++ = WLAN_EID_CHALLENGE;
1531 *tmp++ = WLAN_AUTH_CHALLENGE_LEN;
1532 pos++;
1533 memcpy(pos, sta->u.sta.challenge, WLAN_AUTH_CHALLENGE_LEN);
1534 olen += 2 + WLAN_AUTH_CHALLENGE_LEN;
1535 }
1536
1537 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_AUTH,
1538 body, olen, hdr->addr2, ap->tx_callback_auth);
1539
1540 if (sta) {
1541 sta->last_rx = jiffies;
1542 atomic_dec(&sta->users);
1543 }
1544
1545 if (resp) {
1546 PDEBUG(DEBUG_AP, "%s: %pM auth (alg=%d "
1547 "trans#=%d stat=%d len=%d fc=%04x) ==> %d (%s)\n",
1548 dev->name, hdr->addr2,
1549 auth_alg, auth_transaction, status_code, len,
1550 le16_to_cpu(hdr->frame_control), resp, txt);
1551 }
1552 }
1553
1554
1555 /* Called only as a scheduled task for pending AP frames. */
handle_assoc(local_info_t * local,struct sk_buff * skb,struct hostap_80211_rx_status * rx_stats,int reassoc)1556 static void handle_assoc(local_info_t *local, struct sk_buff *skb,
1557 struct hostap_80211_rx_status *rx_stats, int reassoc)
1558 {
1559 struct net_device *dev = local->dev;
1560 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1561 char body[12], *p, *lpos;
1562 int len, left;
1563 __le16 *pos;
1564 u16 resp = WLAN_STATUS_SUCCESS;
1565 struct sta_info *sta = NULL;
1566 int send_deauth = 0;
1567 char *txt = "";
1568 u8 prev_ap[ETH_ALEN];
1569
1570 left = len = skb->len - IEEE80211_MGMT_HDR_LEN;
1571
1572 if (len < (reassoc ? 10 : 4)) {
1573 PDEBUG(DEBUG_AP, "%s: handle_assoc - too short payload "
1574 "(len=%d, reassoc=%d) from %pM\n",
1575 dev->name, len, reassoc, hdr->addr2);
1576 return;
1577 }
1578
1579 spin_lock_bh(&local->ap->sta_table_lock);
1580 sta = ap_get_sta(local->ap, hdr->addr2);
1581 if (sta == NULL || (sta->flags & WLAN_STA_AUTH) == 0) {
1582 spin_unlock_bh(&local->ap->sta_table_lock);
1583 txt = "trying to associate before authentication";
1584 send_deauth = 1;
1585 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1586 sta = NULL; /* do not decrement sta->users */
1587 goto fail;
1588 }
1589 atomic_inc(&sta->users);
1590 spin_unlock_bh(&local->ap->sta_table_lock);
1591
1592 pos = (__le16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
1593 sta->capability = __le16_to_cpu(*pos);
1594 pos++; left -= 2;
1595 sta->listen_interval = __le16_to_cpu(*pos);
1596 pos++; left -= 2;
1597
1598 if (reassoc) {
1599 memcpy(prev_ap, pos, ETH_ALEN);
1600 pos++; pos++; pos++; left -= 6;
1601 } else
1602 eth_zero_addr(prev_ap);
1603
1604 if (left >= 2) {
1605 unsigned int ileft;
1606 unsigned char *u = (unsigned char *) pos;
1607
1608 if (*u == WLAN_EID_SSID) {
1609 u++; left--;
1610 ileft = *u;
1611 u++; left--;
1612
1613 if (ileft > left || ileft > MAX_SSID_LEN) {
1614 txt = "SSID overflow";
1615 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1616 goto fail;
1617 }
1618
1619 if (ileft != strlen(local->essid) ||
1620 memcmp(local->essid, u, ileft) != 0) {
1621 txt = "not our SSID";
1622 resp = WLAN_STATUS_ASSOC_DENIED_UNSPEC;
1623 goto fail;
1624 }
1625
1626 u += ileft;
1627 left -= ileft;
1628 }
1629
1630 if (left >= 2 && *u == WLAN_EID_SUPP_RATES) {
1631 u++; left--;
1632 ileft = *u;
1633 u++; left--;
1634
1635 if (ileft > left || ileft == 0 ||
1636 ileft > WLAN_SUPP_RATES_MAX) {
1637 txt = "SUPP_RATES len error";
1638 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1639 goto fail;
1640 }
1641
1642 memset(sta->supported_rates, 0,
1643 sizeof(sta->supported_rates));
1644 memcpy(sta->supported_rates, u, ileft);
1645 prism2_check_tx_rates(sta);
1646
1647 u += ileft;
1648 left -= ileft;
1649 }
1650
1651 if (left > 0) {
1652 PDEBUG(DEBUG_AP, "%s: assoc from %pM"
1653 " with extra data (%d bytes) [",
1654 dev->name, hdr->addr2, left);
1655 while (left > 0) {
1656 PDEBUG2(DEBUG_AP, "<%02x>", *u);
1657 u++; left--;
1658 }
1659 PDEBUG2(DEBUG_AP, "]\n");
1660 }
1661 } else {
1662 txt = "frame underflow";
1663 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1664 goto fail;
1665 }
1666
1667 /* get a unique AID */
1668 if (sta->aid > 0)
1669 txt = "OK, old AID";
1670 else {
1671 spin_lock_bh(&local->ap->sta_table_lock);
1672 for (sta->aid = 1; sta->aid <= MAX_AID_TABLE_SIZE; sta->aid++)
1673 if (local->ap->sta_aid[sta->aid - 1] == NULL)
1674 break;
1675 if (sta->aid > MAX_AID_TABLE_SIZE) {
1676 sta->aid = 0;
1677 spin_unlock_bh(&local->ap->sta_table_lock);
1678 resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
1679 txt = "no room for more AIDs";
1680 } else {
1681 local->ap->sta_aid[sta->aid - 1] = sta;
1682 spin_unlock_bh(&local->ap->sta_table_lock);
1683 txt = "OK, new AID";
1684 }
1685 }
1686
1687 fail:
1688 pos = (__le16 *) body;
1689
1690 if (send_deauth) {
1691 *pos = cpu_to_le16(WLAN_REASON_STA_REQ_ASSOC_WITHOUT_AUTH);
1692 pos++;
1693 } else {
1694 /* FIX: CF-Pollable and CF-PollReq should be set to match the
1695 * values in beacons/probe responses */
1696 /* FIX: how about privacy and WEP? */
1697 /* capability */
1698 *pos = cpu_to_le16(WLAN_CAPABILITY_ESS);
1699 pos++;
1700
1701 /* status_code */
1702 *pos = cpu_to_le16(resp);
1703 pos++;
1704
1705 *pos = cpu_to_le16((sta && sta->aid > 0 ? sta->aid : 0) |
1706 BIT(14) | BIT(15)); /* AID */
1707 pos++;
1708
1709 /* Supported rates (Information element) */
1710 p = (char *) pos;
1711 *p++ = WLAN_EID_SUPP_RATES;
1712 lpos = p;
1713 *p++ = 0; /* len */
1714 if (local->tx_rate_control & WLAN_RATE_1M) {
1715 *p++ = local->basic_rates & WLAN_RATE_1M ? 0x82 : 0x02;
1716 (*lpos)++;
1717 }
1718 if (local->tx_rate_control & WLAN_RATE_2M) {
1719 *p++ = local->basic_rates & WLAN_RATE_2M ? 0x84 : 0x04;
1720 (*lpos)++;
1721 }
1722 if (local->tx_rate_control & WLAN_RATE_5M5) {
1723 *p++ = local->basic_rates & WLAN_RATE_5M5 ?
1724 0x8b : 0x0b;
1725 (*lpos)++;
1726 }
1727 if (local->tx_rate_control & WLAN_RATE_11M) {
1728 *p++ = local->basic_rates & WLAN_RATE_11M ?
1729 0x96 : 0x16;
1730 (*lpos)++;
1731 }
1732 pos = (__le16 *) p;
1733 }
1734
1735 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT |
1736 (send_deauth ? IEEE80211_STYPE_DEAUTH :
1737 (reassoc ? IEEE80211_STYPE_REASSOC_RESP :
1738 IEEE80211_STYPE_ASSOC_RESP)),
1739 body, (u8 *) pos - (u8 *) body,
1740 hdr->addr2,
1741 send_deauth ? 0 : local->ap->tx_callback_assoc);
1742
1743 if (sta) {
1744 if (resp == WLAN_STATUS_SUCCESS) {
1745 sta->last_rx = jiffies;
1746 /* STA will be marked associated from TX callback, if
1747 * AssocResp is ACKed */
1748 }
1749 atomic_dec(&sta->users);
1750 }
1751
1752 #if 0
1753 PDEBUG(DEBUG_AP, "%s: %pM %sassoc (len=%d "
1754 "prev_ap=%pM) => %d(%d) (%s)\n",
1755 dev->name,
1756 hdr->addr2,
1757 reassoc ? "re" : "", len,
1758 prev_ap,
1759 resp, send_deauth, txt);
1760 #endif
1761 }
1762
1763
1764 /* Called only as a scheduled task for pending AP frames. */
handle_deauth(local_info_t * local,struct sk_buff * skb,struct hostap_80211_rx_status * rx_stats)1765 static void handle_deauth(local_info_t *local, struct sk_buff *skb,
1766 struct hostap_80211_rx_status *rx_stats)
1767 {
1768 struct net_device *dev = local->dev;
1769 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1770 char *body = (char *) (skb->data + IEEE80211_MGMT_HDR_LEN);
1771 int len;
1772 u16 reason_code;
1773 __le16 *pos;
1774 struct sta_info *sta = NULL;
1775
1776 len = skb->len - IEEE80211_MGMT_HDR_LEN;
1777
1778 if (len < 2) {
1779 printk("handle_deauth - too short payload (len=%d)\n", len);
1780 return;
1781 }
1782
1783 pos = (__le16 *) body;
1784 reason_code = le16_to_cpu(*pos);
1785
1786 PDEBUG(DEBUG_AP, "%s: deauthentication: %pM len=%d, "
1787 "reason_code=%d\n", dev->name, hdr->addr2,
1788 len, reason_code);
1789
1790 spin_lock_bh(&local->ap->sta_table_lock);
1791 sta = ap_get_sta(local->ap, hdr->addr2);
1792 if (sta != NULL) {
1793 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap)
1794 hostap_event_expired_sta(local->dev, sta);
1795 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
1796 }
1797 spin_unlock_bh(&local->ap->sta_table_lock);
1798 if (sta == NULL) {
1799 printk("%s: deauthentication from %pM, "
1800 "reason_code=%d, but STA not authenticated\n", dev->name,
1801 hdr->addr2, reason_code);
1802 }
1803 }
1804
1805
1806 /* Called only as a scheduled task for pending AP frames. */
handle_disassoc(local_info_t * local,struct sk_buff * skb,struct hostap_80211_rx_status * rx_stats)1807 static void handle_disassoc(local_info_t *local, struct sk_buff *skb,
1808 struct hostap_80211_rx_status *rx_stats)
1809 {
1810 struct net_device *dev = local->dev;
1811 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1812 char *body = skb->data + IEEE80211_MGMT_HDR_LEN;
1813 int len;
1814 u16 reason_code;
1815 __le16 *pos;
1816 struct sta_info *sta = NULL;
1817
1818 len = skb->len - IEEE80211_MGMT_HDR_LEN;
1819
1820 if (len < 2) {
1821 printk("handle_disassoc - too short payload (len=%d)\n", len);
1822 return;
1823 }
1824
1825 pos = (__le16 *) body;
1826 reason_code = le16_to_cpu(*pos);
1827
1828 PDEBUG(DEBUG_AP, "%s: disassociation: %pM len=%d, "
1829 "reason_code=%d\n", dev->name, hdr->addr2,
1830 len, reason_code);
1831
1832 spin_lock_bh(&local->ap->sta_table_lock);
1833 sta = ap_get_sta(local->ap, hdr->addr2);
1834 if (sta != NULL) {
1835 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap)
1836 hostap_event_expired_sta(local->dev, sta);
1837 sta->flags &= ~WLAN_STA_ASSOC;
1838 }
1839 spin_unlock_bh(&local->ap->sta_table_lock);
1840 if (sta == NULL) {
1841 printk("%s: disassociation from %pM, "
1842 "reason_code=%d, but STA not authenticated\n",
1843 dev->name, hdr->addr2, reason_code);
1844 }
1845 }
1846
1847
1848 /* Called only as a scheduled task for pending AP frames. */
ap_handle_data_nullfunc(local_info_t * local,struct ieee80211_hdr * hdr)1849 static void ap_handle_data_nullfunc(local_info_t *local,
1850 struct ieee80211_hdr *hdr)
1851 {
1852 struct net_device *dev = local->dev;
1853
1854 /* some STA f/w's seem to require control::ACK frame for
1855 * data::nullfunc, but at least Prism2 station f/w version 0.8.0 does
1856 * not send this..
1857 * send control::ACK for the data::nullfunc */
1858
1859 printk(KERN_DEBUG "Sending control::ACK for data::nullfunc\n");
1860 prism2_send_mgmt(dev, IEEE80211_FTYPE_CTL | IEEE80211_STYPE_ACK,
1861 NULL, 0, hdr->addr2, 0);
1862 }
1863
1864
1865 /* Called only as a scheduled task for pending AP frames. */
ap_handle_dropped_data(local_info_t * local,struct ieee80211_hdr * hdr)1866 static void ap_handle_dropped_data(local_info_t *local,
1867 struct ieee80211_hdr *hdr)
1868 {
1869 struct net_device *dev = local->dev;
1870 struct sta_info *sta;
1871 __le16 reason;
1872
1873 spin_lock_bh(&local->ap->sta_table_lock);
1874 sta = ap_get_sta(local->ap, hdr->addr2);
1875 if (sta)
1876 atomic_inc(&sta->users);
1877 spin_unlock_bh(&local->ap->sta_table_lock);
1878
1879 if (sta != NULL && (sta->flags & WLAN_STA_ASSOC)) {
1880 PDEBUG(DEBUG_AP, "ap_handle_dropped_data: STA is now okay?\n");
1881 atomic_dec(&sta->users);
1882 return;
1883 }
1884
1885 reason = cpu_to_le16(WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
1886 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT |
1887 ((sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) ?
1888 IEEE80211_STYPE_DEAUTH : IEEE80211_STYPE_DISASSOC),
1889 (char *) &reason, sizeof(reason), hdr->addr2, 0);
1890
1891 if (sta)
1892 atomic_dec(&sta->users);
1893 }
1894
1895 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1896
1897
1898 /* Called only as a scheduled task for pending AP frames. */
pspoll_send_buffered(local_info_t * local,struct sta_info * sta,struct sk_buff * skb)1899 static void pspoll_send_buffered(local_info_t *local, struct sta_info *sta,
1900 struct sk_buff *skb)
1901 {
1902 struct hostap_skb_tx_data *meta;
1903
1904 if (!(sta->flags & WLAN_STA_PS)) {
1905 /* Station has moved to non-PS mode, so send all buffered
1906 * frames using normal device queue. */
1907 dev_queue_xmit(skb);
1908 return;
1909 }
1910
1911 /* add a flag for hostap_handle_sta_tx() to know that this skb should
1912 * be passed through even though STA is using PS */
1913 meta = (struct hostap_skb_tx_data *) skb->cb;
1914 meta->flags |= HOSTAP_TX_FLAGS_BUFFERED_FRAME;
1915 if (!skb_queue_empty(&sta->tx_buf)) {
1916 /* indicate to STA that more frames follow */
1917 meta->flags |= HOSTAP_TX_FLAGS_ADD_MOREDATA;
1918 }
1919 dev_queue_xmit(skb);
1920 }
1921
1922
1923 /* Called only as a scheduled task for pending AP frames. */
handle_pspoll(local_info_t * local,struct ieee80211_hdr * hdr,struct hostap_80211_rx_status * rx_stats)1924 static void handle_pspoll(local_info_t *local,
1925 struct ieee80211_hdr *hdr,
1926 struct hostap_80211_rx_status *rx_stats)
1927 {
1928 struct net_device *dev = local->dev;
1929 struct sta_info *sta;
1930 u16 aid;
1931 struct sk_buff *skb;
1932
1933 PDEBUG(DEBUG_PS2, "handle_pspoll: BSSID=%pM, TA=%pM PWRMGT=%d\n",
1934 hdr->addr1, hdr->addr2, !!ieee80211_has_pm(hdr->frame_control));
1935
1936 if (!ether_addr_equal(hdr->addr1, dev->dev_addr)) {
1937 PDEBUG(DEBUG_AP,
1938 "handle_pspoll - addr1(BSSID)=%pM not own MAC\n",
1939 hdr->addr1);
1940 return;
1941 }
1942
1943 aid = le16_to_cpu(hdr->duration_id);
1944 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) {
1945 PDEBUG(DEBUG_PS, " PSPOLL and AID[15:14] not set\n");
1946 return;
1947 }
1948 aid &= ~(BIT(15) | BIT(14));
1949 if (aid == 0 || aid > MAX_AID_TABLE_SIZE) {
1950 PDEBUG(DEBUG_PS, " invalid aid=%d\n", aid);
1951 return;
1952 }
1953 PDEBUG(DEBUG_PS2, " aid=%d\n", aid);
1954
1955 spin_lock_bh(&local->ap->sta_table_lock);
1956 sta = ap_get_sta(local->ap, hdr->addr2);
1957 if (sta)
1958 atomic_inc(&sta->users);
1959 spin_unlock_bh(&local->ap->sta_table_lock);
1960
1961 if (sta == NULL) {
1962 PDEBUG(DEBUG_PS, " STA not found\n");
1963 return;
1964 }
1965 if (sta->aid != aid) {
1966 PDEBUG(DEBUG_PS, " received aid=%i does not match with "
1967 "assoc.aid=%d\n", aid, sta->aid);
1968 return;
1969 }
1970
1971 /* FIX: todo:
1972 * - add timeout for buffering (clear aid in TIM vector if buffer timed
1973 * out (expiry time must be longer than ListenInterval for
1974 * the corresponding STA; "8802-11: 11.2.1.9 AP aging function"
1975 * - what to do, if buffered, pspolled, and sent frame is not ACKed by
1976 * sta; store buffer for later use and leave TIM aid bit set? use
1977 * TX event to check whether frame was ACKed?
1978 */
1979
1980 while ((skb = skb_dequeue(&sta->tx_buf)) != NULL) {
1981 /* send buffered frame .. */
1982 PDEBUG(DEBUG_PS2, "Sending buffered frame to STA after PS POLL"
1983 " (buffer_count=%d)\n", skb_queue_len(&sta->tx_buf));
1984
1985 pspoll_send_buffered(local, sta, skb);
1986
1987 if (sta->flags & WLAN_STA_PS) {
1988 /* send only one buffered packet per PS Poll */
1989 /* FIX: should ignore further PS Polls until the
1990 * buffered packet that was just sent is acknowledged
1991 * (Tx or TxExc event) */
1992 break;
1993 }
1994 }
1995
1996 if (skb_queue_empty(&sta->tx_buf)) {
1997 /* try to clear aid from TIM */
1998 if (!(sta->flags & WLAN_STA_TIM))
1999 PDEBUG(DEBUG_PS2, "Re-unsetting TIM for aid %d\n",
2000 aid);
2001 hostap_set_tim(local, aid, 0);
2002 sta->flags &= ~WLAN_STA_TIM;
2003 }
2004
2005 atomic_dec(&sta->users);
2006 }
2007
2008
2009 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2010
handle_wds_oper_queue(struct work_struct * work)2011 static void handle_wds_oper_queue(struct work_struct *work)
2012 {
2013 struct ap_data *ap = container_of(work, struct ap_data,
2014 wds_oper_queue);
2015 local_info_t *local = ap->local;
2016 struct wds_oper_data *entry, *prev;
2017
2018 spin_lock_bh(&local->lock);
2019 entry = local->ap->wds_oper_entries;
2020 local->ap->wds_oper_entries = NULL;
2021 spin_unlock_bh(&local->lock);
2022
2023 while (entry) {
2024 PDEBUG(DEBUG_AP, "%s: %s automatic WDS connection "
2025 "to AP %pM\n",
2026 local->dev->name,
2027 entry->type == WDS_ADD ? "adding" : "removing",
2028 entry->addr);
2029 if (entry->type == WDS_ADD)
2030 prism2_wds_add(local, entry->addr, 0);
2031 else if (entry->type == WDS_DEL)
2032 prism2_wds_del(local, entry->addr, 0, 1);
2033
2034 prev = entry;
2035 entry = entry->next;
2036 kfree(prev);
2037 }
2038 }
2039
2040
2041 /* Called only as a scheduled task for pending AP frames. */
handle_beacon(local_info_t * local,struct sk_buff * skb,struct hostap_80211_rx_status * rx_stats)2042 static void handle_beacon(local_info_t *local, struct sk_buff *skb,
2043 struct hostap_80211_rx_status *rx_stats)
2044 {
2045 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
2046 char *body = skb->data + IEEE80211_MGMT_HDR_LEN;
2047 int len, left;
2048 u16 beacon_int, capability;
2049 __le16 *pos;
2050 char *ssid = NULL;
2051 unsigned char *supp_rates = NULL;
2052 int ssid_len = 0, supp_rates_len = 0;
2053 struct sta_info *sta = NULL;
2054 int new_sta = 0, channel = -1;
2055
2056 len = skb->len - IEEE80211_MGMT_HDR_LEN;
2057
2058 if (len < 8 + 2 + 2) {
2059 printk(KERN_DEBUG "handle_beacon - too short payload "
2060 "(len=%d)\n", len);
2061 return;
2062 }
2063
2064 pos = (__le16 *) body;
2065 left = len;
2066
2067 /* Timestamp (8 octets) */
2068 pos += 4; left -= 8;
2069 /* Beacon interval (2 octets) */
2070 beacon_int = le16_to_cpu(*pos);
2071 pos++; left -= 2;
2072 /* Capability information (2 octets) */
2073 capability = le16_to_cpu(*pos);
2074 pos++; left -= 2;
2075
2076 if (local->ap->ap_policy != AP_OTHER_AP_EVEN_IBSS &&
2077 capability & WLAN_CAPABILITY_IBSS)
2078 return;
2079
2080 if (left >= 2) {
2081 unsigned int ileft;
2082 unsigned char *u = (unsigned char *) pos;
2083
2084 if (*u == WLAN_EID_SSID) {
2085 u++; left--;
2086 ileft = *u;
2087 u++; left--;
2088
2089 if (ileft > left || ileft > MAX_SSID_LEN) {
2090 PDEBUG(DEBUG_AP, "SSID: overflow\n");
2091 return;
2092 }
2093
2094 if (local->ap->ap_policy == AP_OTHER_AP_SAME_SSID &&
2095 (ileft != strlen(local->essid) ||
2096 memcmp(local->essid, u, ileft) != 0)) {
2097 /* not our SSID */
2098 return;
2099 }
2100
2101 ssid = u;
2102 ssid_len = ileft;
2103
2104 u += ileft;
2105 left -= ileft;
2106 }
2107
2108 if (*u == WLAN_EID_SUPP_RATES) {
2109 u++; left--;
2110 ileft = *u;
2111 u++; left--;
2112
2113 if (ileft > left || ileft == 0 || ileft > 8) {
2114 PDEBUG(DEBUG_AP, " - SUPP_RATES len error\n");
2115 return;
2116 }
2117
2118 supp_rates = u;
2119 supp_rates_len = ileft;
2120
2121 u += ileft;
2122 left -= ileft;
2123 }
2124
2125 if (*u == WLAN_EID_DS_PARAMS) {
2126 u++; left--;
2127 ileft = *u;
2128 u++; left--;
2129
2130 if (ileft > left || ileft != 1) {
2131 PDEBUG(DEBUG_AP, " - DS_PARAMS len error\n");
2132 return;
2133 }
2134
2135 channel = *u;
2136
2137 u += ileft;
2138 left -= ileft;
2139 }
2140 }
2141
2142 spin_lock_bh(&local->ap->sta_table_lock);
2143 sta = ap_get_sta(local->ap, hdr->addr2);
2144 if (sta != NULL)
2145 atomic_inc(&sta->users);
2146 spin_unlock_bh(&local->ap->sta_table_lock);
2147
2148 if (sta == NULL) {
2149 /* add new AP */
2150 new_sta = 1;
2151 sta = ap_add_sta(local->ap, hdr->addr2);
2152 if (sta == NULL) {
2153 printk(KERN_INFO "prism2: kmalloc failed for AP "
2154 "data structure\n");
2155 return;
2156 }
2157 hostap_event_new_sta(local->dev, sta);
2158
2159 /* mark APs authentication and associated for pseudo ad-hoc
2160 * style communication */
2161 sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
2162
2163 if (local->ap->autom_ap_wds) {
2164 hostap_wds_link_oper(local, sta->addr, WDS_ADD);
2165 }
2166 }
2167
2168 sta->ap = 1;
2169 if (ssid) {
2170 sta->u.ap.ssid_len = ssid_len;
2171 memcpy(sta->u.ap.ssid, ssid, ssid_len);
2172 sta->u.ap.ssid[ssid_len] = '\0';
2173 } else {
2174 sta->u.ap.ssid_len = 0;
2175 sta->u.ap.ssid[0] = '\0';
2176 }
2177 sta->u.ap.channel = channel;
2178 sta->rx_packets++;
2179 sta->rx_bytes += len;
2180 sta->u.ap.last_beacon = sta->last_rx = jiffies;
2181 sta->capability = capability;
2182 sta->listen_interval = beacon_int;
2183
2184 atomic_dec(&sta->users);
2185
2186 if (new_sta) {
2187 memset(sta->supported_rates, 0, sizeof(sta->supported_rates));
2188 memcpy(sta->supported_rates, supp_rates, supp_rates_len);
2189 prism2_check_tx_rates(sta);
2190 }
2191 }
2192
2193 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2194
2195
2196 /* Called only as a tasklet. */
handle_ap_item(local_info_t * local,struct sk_buff * skb,struct hostap_80211_rx_status * rx_stats)2197 static void handle_ap_item(local_info_t *local, struct sk_buff *skb,
2198 struct hostap_80211_rx_status *rx_stats)
2199 {
2200 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2201 struct net_device *dev = local->dev;
2202 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2203 u16 fc, type, stype;
2204 struct ieee80211_hdr *hdr;
2205
2206 /* FIX: should give skb->len to handler functions and check that the
2207 * buffer is long enough */
2208 hdr = (struct ieee80211_hdr *) skb->data;
2209 fc = le16_to_cpu(hdr->frame_control);
2210 type = fc & IEEE80211_FCTL_FTYPE;
2211 stype = fc & IEEE80211_FCTL_STYPE;
2212
2213 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2214 if (!local->hostapd && type == IEEE80211_FTYPE_DATA) {
2215 PDEBUG(DEBUG_AP, "handle_ap_item - data frame\n");
2216
2217 if (!(fc & IEEE80211_FCTL_TODS) ||
2218 (fc & IEEE80211_FCTL_FROMDS)) {
2219 if (stype == IEEE80211_STYPE_NULLFUNC) {
2220 /* no ToDS nullfunc seems to be used to check
2221 * AP association; so send reject message to
2222 * speed up re-association */
2223 ap_handle_dropped_data(local, hdr);
2224 goto done;
2225 }
2226 PDEBUG(DEBUG_AP, " not ToDS frame (fc=0x%04x)\n",
2227 fc);
2228 goto done;
2229 }
2230
2231 if (!ether_addr_equal(hdr->addr1, dev->dev_addr)) {
2232 PDEBUG(DEBUG_AP, "handle_ap_item - addr1(BSSID)=%pM"
2233 " not own MAC\n", hdr->addr1);
2234 goto done;
2235 }
2236
2237 if (local->ap->nullfunc_ack &&
2238 stype == IEEE80211_STYPE_NULLFUNC)
2239 ap_handle_data_nullfunc(local, hdr);
2240 else
2241 ap_handle_dropped_data(local, hdr);
2242 goto done;
2243 }
2244
2245 if (type == IEEE80211_FTYPE_MGMT && stype == IEEE80211_STYPE_BEACON) {
2246 handle_beacon(local, skb, rx_stats);
2247 goto done;
2248 }
2249 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2250
2251 if (type == IEEE80211_FTYPE_CTL && stype == IEEE80211_STYPE_PSPOLL) {
2252 handle_pspoll(local, hdr, rx_stats);
2253 goto done;
2254 }
2255
2256 if (local->hostapd) {
2257 PDEBUG(DEBUG_AP, "Unknown frame in AP queue: type=0x%02x "
2258 "subtype=0x%02x\n", type, stype);
2259 goto done;
2260 }
2261
2262 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2263 if (type != IEEE80211_FTYPE_MGMT) {
2264 PDEBUG(DEBUG_AP, "handle_ap_item - not a management frame?\n");
2265 goto done;
2266 }
2267
2268 if (!ether_addr_equal(hdr->addr1, dev->dev_addr)) {
2269 PDEBUG(DEBUG_AP, "handle_ap_item - addr1(DA)=%pM"
2270 " not own MAC\n", hdr->addr1);
2271 goto done;
2272 }
2273
2274 if (!ether_addr_equal(hdr->addr3, dev->dev_addr)) {
2275 PDEBUG(DEBUG_AP, "handle_ap_item - addr3(BSSID)=%pM"
2276 " not own MAC\n", hdr->addr3);
2277 goto done;
2278 }
2279
2280 switch (stype) {
2281 case IEEE80211_STYPE_ASSOC_REQ:
2282 handle_assoc(local, skb, rx_stats, 0);
2283 break;
2284 case IEEE80211_STYPE_ASSOC_RESP:
2285 PDEBUG(DEBUG_AP, "==> ASSOC RESP (ignored)\n");
2286 break;
2287 case IEEE80211_STYPE_REASSOC_REQ:
2288 handle_assoc(local, skb, rx_stats, 1);
2289 break;
2290 case IEEE80211_STYPE_REASSOC_RESP:
2291 PDEBUG(DEBUG_AP, "==> REASSOC RESP (ignored)\n");
2292 break;
2293 case IEEE80211_STYPE_ATIM:
2294 PDEBUG(DEBUG_AP, "==> ATIM (ignored)\n");
2295 break;
2296 case IEEE80211_STYPE_DISASSOC:
2297 handle_disassoc(local, skb, rx_stats);
2298 break;
2299 case IEEE80211_STYPE_AUTH:
2300 handle_authen(local, skb, rx_stats);
2301 break;
2302 case IEEE80211_STYPE_DEAUTH:
2303 handle_deauth(local, skb, rx_stats);
2304 break;
2305 default:
2306 PDEBUG(DEBUG_AP, "Unknown mgmt frame subtype 0x%02x\n",
2307 stype >> 4);
2308 break;
2309 }
2310 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2311
2312 done:
2313 dev_kfree_skb(skb);
2314 }
2315
2316
2317 /* Called only as a tasklet (software IRQ) */
hostap_rx(struct net_device * dev,struct sk_buff * skb,struct hostap_80211_rx_status * rx_stats)2318 void hostap_rx(struct net_device *dev, struct sk_buff *skb,
2319 struct hostap_80211_rx_status *rx_stats)
2320 {
2321 struct hostap_interface *iface;
2322 local_info_t *local;
2323 struct ieee80211_hdr *hdr;
2324
2325 iface = netdev_priv(dev);
2326 local = iface->local;
2327
2328 if (skb->len < 16)
2329 goto drop;
2330
2331 dev->stats.rx_packets++;
2332
2333 hdr = (struct ieee80211_hdr *) skb->data;
2334
2335 if (local->ap->ap_policy == AP_OTHER_AP_SKIP_ALL &&
2336 ieee80211_is_beacon(hdr->frame_control))
2337 goto drop;
2338
2339 skb->protocol = cpu_to_be16(ETH_P_HOSTAP);
2340 handle_ap_item(local, skb, rx_stats);
2341 return;
2342
2343 drop:
2344 dev_kfree_skb(skb);
2345 }
2346
2347
2348 /* Called only as a tasklet (software IRQ) */
schedule_packet_send(local_info_t * local,struct sta_info * sta)2349 static void schedule_packet_send(local_info_t *local, struct sta_info *sta)
2350 {
2351 struct sk_buff *skb;
2352 struct ieee80211_hdr *hdr;
2353 struct hostap_80211_rx_status rx_stats;
2354
2355 if (skb_queue_empty(&sta->tx_buf))
2356 return;
2357
2358 skb = dev_alloc_skb(16);
2359 if (skb == NULL) {
2360 printk(KERN_DEBUG "%s: schedule_packet_send: skb alloc "
2361 "failed\n", local->dev->name);
2362 return;
2363 }
2364
2365 hdr = skb_put(skb, 16);
2366
2367 /* Generate a fake pspoll frame to start packet delivery */
2368 hdr->frame_control = cpu_to_le16(
2369 IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL);
2370 memcpy(hdr->addr1, local->dev->dev_addr, ETH_ALEN);
2371 memcpy(hdr->addr2, sta->addr, ETH_ALEN);
2372 hdr->duration_id = cpu_to_le16(sta->aid | BIT(15) | BIT(14));
2373
2374 PDEBUG(DEBUG_PS2,
2375 "%s: Scheduling buffered packet delivery for STA %pM\n",
2376 local->dev->name, sta->addr);
2377
2378 skb->dev = local->dev;
2379
2380 memset(&rx_stats, 0, sizeof(rx_stats));
2381 hostap_rx(local->dev, skb, &rx_stats);
2382 }
2383
2384
prism2_ap_get_sta_qual(local_info_t * local,struct sockaddr addr[],struct iw_quality qual[],int buf_size,int aplist)2385 int prism2_ap_get_sta_qual(local_info_t *local, struct sockaddr addr[],
2386 struct iw_quality qual[], int buf_size,
2387 int aplist)
2388 {
2389 struct ap_data *ap = local->ap;
2390 struct list_head *ptr;
2391 int count = 0;
2392
2393 spin_lock_bh(&ap->sta_table_lock);
2394
2395 for (ptr = ap->sta_list.next; ptr != NULL && ptr != &ap->sta_list;
2396 ptr = ptr->next) {
2397 struct sta_info *sta = (struct sta_info *) ptr;
2398
2399 if (aplist && !sta->ap)
2400 continue;
2401 addr[count].sa_family = ARPHRD_ETHER;
2402 memcpy(addr[count].sa_data, sta->addr, ETH_ALEN);
2403 if (sta->last_rx_silence == 0)
2404 qual[count].qual = sta->last_rx_signal < 27 ?
2405 0 : (sta->last_rx_signal - 27) * 92 / 127;
2406 else
2407 qual[count].qual = sta->last_rx_signal -
2408 sta->last_rx_silence - 35;
2409 qual[count].level = HFA384X_LEVEL_TO_dBm(sta->last_rx_signal);
2410 qual[count].noise = HFA384X_LEVEL_TO_dBm(sta->last_rx_silence);
2411 qual[count].updated = sta->last_rx_updated;
2412
2413 sta->last_rx_updated = IW_QUAL_DBM;
2414
2415 count++;
2416 if (count >= buf_size)
2417 break;
2418 }
2419 spin_unlock_bh(&ap->sta_table_lock);
2420
2421 return count;
2422 }
2423
2424
2425 /* Translate our list of Access Points & Stations to a card independent
2426 * format that the Wireless Tools will understand - Jean II */
prism2_ap_translate_scan(struct net_device * dev,struct iw_request_info * info,char * buffer)2427 int prism2_ap_translate_scan(struct net_device *dev,
2428 struct iw_request_info *info, char *buffer)
2429 {
2430 struct hostap_interface *iface;
2431 local_info_t *local;
2432 struct ap_data *ap;
2433 struct list_head *ptr;
2434 struct iw_event iwe;
2435 char *current_ev = buffer;
2436 char *end_buf = buffer + IW_SCAN_MAX_DATA;
2437 #if !defined(PRISM2_NO_KERNEL_IEEE80211_MGMT)
2438 char buf[64];
2439 #endif
2440
2441 iface = netdev_priv(dev);
2442 local = iface->local;
2443 ap = local->ap;
2444
2445 spin_lock_bh(&ap->sta_table_lock);
2446
2447 for (ptr = ap->sta_list.next; ptr != NULL && ptr != &ap->sta_list;
2448 ptr = ptr->next) {
2449 struct sta_info *sta = (struct sta_info *) ptr;
2450
2451 /* First entry *MUST* be the AP MAC address */
2452 memset(&iwe, 0, sizeof(iwe));
2453 iwe.cmd = SIOCGIWAP;
2454 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
2455 memcpy(iwe.u.ap_addr.sa_data, sta->addr, ETH_ALEN);
2456 iwe.len = IW_EV_ADDR_LEN;
2457 current_ev = iwe_stream_add_event(info, current_ev, end_buf,
2458 &iwe, IW_EV_ADDR_LEN);
2459
2460 /* Use the mode to indicate if it's a station or
2461 * an Access Point */
2462 memset(&iwe, 0, sizeof(iwe));
2463 iwe.cmd = SIOCGIWMODE;
2464 if (sta->ap)
2465 iwe.u.mode = IW_MODE_MASTER;
2466 else
2467 iwe.u.mode = IW_MODE_INFRA;
2468 iwe.len = IW_EV_UINT_LEN;
2469 current_ev = iwe_stream_add_event(info, current_ev, end_buf,
2470 &iwe, IW_EV_UINT_LEN);
2471
2472 /* Some quality */
2473 memset(&iwe, 0, sizeof(iwe));
2474 iwe.cmd = IWEVQUAL;
2475 if (sta->last_rx_silence == 0)
2476 iwe.u.qual.qual = sta->last_rx_signal < 27 ?
2477 0 : (sta->last_rx_signal - 27) * 92 / 127;
2478 else
2479 iwe.u.qual.qual = sta->last_rx_signal -
2480 sta->last_rx_silence - 35;
2481 iwe.u.qual.level = HFA384X_LEVEL_TO_dBm(sta->last_rx_signal);
2482 iwe.u.qual.noise = HFA384X_LEVEL_TO_dBm(sta->last_rx_silence);
2483 iwe.u.qual.updated = sta->last_rx_updated;
2484 iwe.len = IW_EV_QUAL_LEN;
2485 current_ev = iwe_stream_add_event(info, current_ev, end_buf,
2486 &iwe, IW_EV_QUAL_LEN);
2487
2488 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2489 if (sta->ap) {
2490 memset(&iwe, 0, sizeof(iwe));
2491 iwe.cmd = SIOCGIWESSID;
2492 iwe.u.data.length = sta->u.ap.ssid_len;
2493 iwe.u.data.flags = 1;
2494 current_ev = iwe_stream_add_point(info, current_ev,
2495 end_buf, &iwe,
2496 sta->u.ap.ssid);
2497
2498 memset(&iwe, 0, sizeof(iwe));
2499 iwe.cmd = SIOCGIWENCODE;
2500 if (sta->capability & WLAN_CAPABILITY_PRIVACY)
2501 iwe.u.data.flags =
2502 IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
2503 else
2504 iwe.u.data.flags = IW_ENCODE_DISABLED;
2505 current_ev = iwe_stream_add_point(info, current_ev,
2506 end_buf, &iwe,
2507 sta->u.ap.ssid);
2508
2509 if (sta->u.ap.channel > 0 &&
2510 sta->u.ap.channel <= FREQ_COUNT) {
2511 memset(&iwe, 0, sizeof(iwe));
2512 iwe.cmd = SIOCGIWFREQ;
2513 iwe.u.freq.m = freq_list[sta->u.ap.channel - 1]
2514 * 100000;
2515 iwe.u.freq.e = 1;
2516 current_ev = iwe_stream_add_event(
2517 info, current_ev, end_buf, &iwe,
2518 IW_EV_FREQ_LEN);
2519 }
2520
2521 memset(&iwe, 0, sizeof(iwe));
2522 iwe.cmd = IWEVCUSTOM;
2523 sprintf(buf, "beacon_interval=%d",
2524 sta->listen_interval);
2525 iwe.u.data.length = strlen(buf);
2526 current_ev = iwe_stream_add_point(info, current_ev,
2527 end_buf, &iwe, buf);
2528 }
2529 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2530
2531 sta->last_rx_updated = IW_QUAL_DBM;
2532
2533 /* To be continued, we should make good use of IWEVCUSTOM */
2534 }
2535
2536 spin_unlock_bh(&ap->sta_table_lock);
2537
2538 return current_ev - buffer;
2539 }
2540
2541
prism2_hostapd_add_sta(struct ap_data * ap,struct prism2_hostapd_param * param)2542 static int prism2_hostapd_add_sta(struct ap_data *ap,
2543 struct prism2_hostapd_param *param)
2544 {
2545 struct sta_info *sta;
2546
2547 spin_lock_bh(&ap->sta_table_lock);
2548 sta = ap_get_sta(ap, param->sta_addr);
2549 if (sta)
2550 atomic_inc(&sta->users);
2551 spin_unlock_bh(&ap->sta_table_lock);
2552
2553 if (sta == NULL) {
2554 sta = ap_add_sta(ap, param->sta_addr);
2555 if (sta == NULL)
2556 return -1;
2557 }
2558
2559 if (!(sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
2560 hostap_event_new_sta(sta->local->dev, sta);
2561
2562 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC;
2563 sta->last_rx = jiffies;
2564 sta->aid = param->u.add_sta.aid;
2565 sta->capability = param->u.add_sta.capability;
2566 sta->tx_supp_rates = param->u.add_sta.tx_supp_rates;
2567 if (sta->tx_supp_rates & WLAN_RATE_1M)
2568 sta->supported_rates[0] = 2;
2569 if (sta->tx_supp_rates & WLAN_RATE_2M)
2570 sta->supported_rates[1] = 4;
2571 if (sta->tx_supp_rates & WLAN_RATE_5M5)
2572 sta->supported_rates[2] = 11;
2573 if (sta->tx_supp_rates & WLAN_RATE_11M)
2574 sta->supported_rates[3] = 22;
2575 prism2_check_tx_rates(sta);
2576 atomic_dec(&sta->users);
2577 return 0;
2578 }
2579
2580
prism2_hostapd_remove_sta(struct ap_data * ap,struct prism2_hostapd_param * param)2581 static int prism2_hostapd_remove_sta(struct ap_data *ap,
2582 struct prism2_hostapd_param *param)
2583 {
2584 struct sta_info *sta;
2585
2586 spin_lock_bh(&ap->sta_table_lock);
2587 sta = ap_get_sta(ap, param->sta_addr);
2588 if (sta) {
2589 ap_sta_hash_del(ap, sta);
2590 list_del(&sta->list);
2591 }
2592 spin_unlock_bh(&ap->sta_table_lock);
2593
2594 if (!sta)
2595 return -ENOENT;
2596
2597 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
2598 hostap_event_expired_sta(sta->local->dev, sta);
2599 ap_free_sta(ap, sta);
2600
2601 return 0;
2602 }
2603
2604
prism2_hostapd_get_info_sta(struct ap_data * ap,struct prism2_hostapd_param * param)2605 static int prism2_hostapd_get_info_sta(struct ap_data *ap,
2606 struct prism2_hostapd_param *param)
2607 {
2608 struct sta_info *sta;
2609
2610 spin_lock_bh(&ap->sta_table_lock);
2611 sta = ap_get_sta(ap, param->sta_addr);
2612 if (sta)
2613 atomic_inc(&sta->users);
2614 spin_unlock_bh(&ap->sta_table_lock);
2615
2616 if (!sta)
2617 return -ENOENT;
2618
2619 param->u.get_info_sta.inactive_sec = (jiffies - sta->last_rx) / HZ;
2620
2621 atomic_dec(&sta->users);
2622
2623 return 1;
2624 }
2625
2626
prism2_hostapd_set_flags_sta(struct ap_data * ap,struct prism2_hostapd_param * param)2627 static int prism2_hostapd_set_flags_sta(struct ap_data *ap,
2628 struct prism2_hostapd_param *param)
2629 {
2630 struct sta_info *sta;
2631
2632 spin_lock_bh(&ap->sta_table_lock);
2633 sta = ap_get_sta(ap, param->sta_addr);
2634 if (sta) {
2635 sta->flags |= param->u.set_flags_sta.flags_or;
2636 sta->flags &= param->u.set_flags_sta.flags_and;
2637 }
2638 spin_unlock_bh(&ap->sta_table_lock);
2639
2640 if (!sta)
2641 return -ENOENT;
2642
2643 return 0;
2644 }
2645
2646
prism2_hostapd_sta_clear_stats(struct ap_data * ap,struct prism2_hostapd_param * param)2647 static int prism2_hostapd_sta_clear_stats(struct ap_data *ap,
2648 struct prism2_hostapd_param *param)
2649 {
2650 struct sta_info *sta;
2651 int rate;
2652
2653 spin_lock_bh(&ap->sta_table_lock);
2654 sta = ap_get_sta(ap, param->sta_addr);
2655 if (sta) {
2656 sta->rx_packets = sta->tx_packets = 0;
2657 sta->rx_bytes = sta->tx_bytes = 0;
2658 for (rate = 0; rate < WLAN_RATE_COUNT; rate++) {
2659 sta->tx_count[rate] = 0;
2660 sta->rx_count[rate] = 0;
2661 }
2662 }
2663 spin_unlock_bh(&ap->sta_table_lock);
2664
2665 if (!sta)
2666 return -ENOENT;
2667
2668 return 0;
2669 }
2670
2671
prism2_hostapd(struct ap_data * ap,struct prism2_hostapd_param * param)2672 int prism2_hostapd(struct ap_data *ap, struct prism2_hostapd_param *param)
2673 {
2674 switch (param->cmd) {
2675 case PRISM2_HOSTAPD_FLUSH:
2676 ap_control_kickall(ap);
2677 return 0;
2678 case PRISM2_HOSTAPD_ADD_STA:
2679 return prism2_hostapd_add_sta(ap, param);
2680 case PRISM2_HOSTAPD_REMOVE_STA:
2681 return prism2_hostapd_remove_sta(ap, param);
2682 case PRISM2_HOSTAPD_GET_INFO_STA:
2683 return prism2_hostapd_get_info_sta(ap, param);
2684 case PRISM2_HOSTAPD_SET_FLAGS_STA:
2685 return prism2_hostapd_set_flags_sta(ap, param);
2686 case PRISM2_HOSTAPD_STA_CLEAR_STATS:
2687 return prism2_hostapd_sta_clear_stats(ap, param);
2688 default:
2689 printk(KERN_WARNING "prism2_hostapd: unknown cmd=%d\n",
2690 param->cmd);
2691 return -EOPNOTSUPP;
2692 }
2693 }
2694
2695
2696 /* Update station info for host-based TX rate control and return current
2697 * TX rate */
ap_update_sta_tx_rate(struct sta_info * sta,struct net_device * dev)2698 static int ap_update_sta_tx_rate(struct sta_info *sta, struct net_device *dev)
2699 {
2700 int ret = sta->tx_rate;
2701 struct hostap_interface *iface;
2702 local_info_t *local;
2703
2704 iface = netdev_priv(dev);
2705 local = iface->local;
2706
2707 sta->tx_count[sta->tx_rate_idx]++;
2708 sta->tx_since_last_failure++;
2709 sta->tx_consecutive_exc = 0;
2710 if (sta->tx_since_last_failure >= WLAN_RATE_UPDATE_COUNT &&
2711 sta->tx_rate_idx < sta->tx_max_rate) {
2712 /* use next higher rate */
2713 int old_rate, new_rate;
2714 old_rate = new_rate = sta->tx_rate_idx;
2715 while (new_rate < sta->tx_max_rate) {
2716 new_rate++;
2717 if (ap_tx_rate_ok(new_rate, sta, local)) {
2718 sta->tx_rate_idx = new_rate;
2719 break;
2720 }
2721 }
2722 if (old_rate != sta->tx_rate_idx) {
2723 switch (sta->tx_rate_idx) {
2724 case 0: sta->tx_rate = 10; break;
2725 case 1: sta->tx_rate = 20; break;
2726 case 2: sta->tx_rate = 55; break;
2727 case 3: sta->tx_rate = 110; break;
2728 default: sta->tx_rate = 0; break;
2729 }
2730 PDEBUG(DEBUG_AP, "%s: STA %pM TX rate raised to %d\n",
2731 dev->name, sta->addr, sta->tx_rate);
2732 }
2733 sta->tx_since_last_failure = 0;
2734 }
2735
2736 return ret;
2737 }
2738
2739
2740 /* Called only from software IRQ. Called for each TX frame prior possible
2741 * encryption and transmit. */
hostap_handle_sta_tx(local_info_t * local,struct hostap_tx_data * tx)2742 ap_tx_ret hostap_handle_sta_tx(local_info_t *local, struct hostap_tx_data *tx)
2743 {
2744 struct sta_info *sta = NULL;
2745 struct sk_buff *skb = tx->skb;
2746 int set_tim, ret;
2747 struct ieee80211_hdr *hdr;
2748 struct hostap_skb_tx_data *meta;
2749
2750 meta = (struct hostap_skb_tx_data *) skb->cb;
2751 ret = AP_TX_CONTINUE;
2752 if (local->ap == NULL || skb->len < 10 ||
2753 meta->iface->type == HOSTAP_INTERFACE_STA)
2754 goto out;
2755
2756 hdr = (struct ieee80211_hdr *) skb->data;
2757
2758 if (hdr->addr1[0] & 0x01) {
2759 /* broadcast/multicast frame - no AP related processing */
2760 if (local->ap->num_sta <= 0)
2761 ret = AP_TX_DROP;
2762 goto out;
2763 }
2764
2765 /* unicast packet - check whether destination STA is associated */
2766 spin_lock(&local->ap->sta_table_lock);
2767 sta = ap_get_sta(local->ap, hdr->addr1);
2768 if (sta)
2769 atomic_inc(&sta->users);
2770 spin_unlock(&local->ap->sta_table_lock);
2771
2772 if (local->iw_mode == IW_MODE_MASTER && sta == NULL &&
2773 !(meta->flags & HOSTAP_TX_FLAGS_WDS) &&
2774 meta->iface->type != HOSTAP_INTERFACE_MASTER &&
2775 meta->iface->type != HOSTAP_INTERFACE_AP) {
2776 #if 0
2777 /* This can happen, e.g., when wlan0 is added to a bridge and
2778 * bridging code does not know which port is the correct target
2779 * for a unicast frame. In this case, the packet is send to all
2780 * ports of the bridge. Since this is a valid scenario, do not
2781 * print out any errors here. */
2782 if (net_ratelimit()) {
2783 printk(KERN_DEBUG "AP: drop packet to non-associated "
2784 "STA %pM\n", hdr->addr1);
2785 }
2786 #endif
2787 local->ap->tx_drop_nonassoc++;
2788 ret = AP_TX_DROP;
2789 goto out;
2790 }
2791
2792 if (sta == NULL)
2793 goto out;
2794
2795 if (!(sta->flags & WLAN_STA_AUTHORIZED))
2796 ret = AP_TX_CONTINUE_NOT_AUTHORIZED;
2797
2798 /* Set tx_rate if using host-based TX rate control */
2799 if (!local->fw_tx_rate_control)
2800 local->ap->last_tx_rate = meta->rate =
2801 ap_update_sta_tx_rate(sta, local->dev);
2802
2803 if (local->iw_mode != IW_MODE_MASTER)
2804 goto out;
2805
2806 if (!(sta->flags & WLAN_STA_PS))
2807 goto out;
2808
2809 if (meta->flags & HOSTAP_TX_FLAGS_ADD_MOREDATA) {
2810 /* indicate to STA that more frames follow */
2811 hdr->frame_control |=
2812 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
2813 }
2814
2815 if (meta->flags & HOSTAP_TX_FLAGS_BUFFERED_FRAME) {
2816 /* packet was already buffered and now send due to
2817 * PS poll, so do not rebuffer it */
2818 goto out;
2819 }
2820
2821 if (skb_queue_len(&sta->tx_buf) >= STA_MAX_TX_BUFFER) {
2822 PDEBUG(DEBUG_PS, "%s: No more space in STA (%pM)'s"
2823 "PS mode buffer\n",
2824 local->dev->name, sta->addr);
2825 /* Make sure that TIM is set for the station (it might not be
2826 * after AP wlan hw reset). */
2827 /* FIX: should fix hw reset to restore bits based on STA
2828 * buffer state.. */
2829 hostap_set_tim(local, sta->aid, 1);
2830 sta->flags |= WLAN_STA_TIM;
2831 ret = AP_TX_DROP;
2832 goto out;
2833 }
2834
2835 /* STA in PS mode, buffer frame for later delivery */
2836 set_tim = skb_queue_empty(&sta->tx_buf);
2837 skb_queue_tail(&sta->tx_buf, skb);
2838 /* FIX: could save RX time to skb and expire buffered frames after
2839 * some time if STA does not poll for them */
2840
2841 if (set_tim) {
2842 if (sta->flags & WLAN_STA_TIM)
2843 PDEBUG(DEBUG_PS2, "Re-setting TIM for aid %d\n",
2844 sta->aid);
2845 hostap_set_tim(local, sta->aid, 1);
2846 sta->flags |= WLAN_STA_TIM;
2847 }
2848
2849 ret = AP_TX_BUFFERED;
2850
2851 out:
2852 if (sta != NULL) {
2853 if (ret == AP_TX_CONTINUE ||
2854 ret == AP_TX_CONTINUE_NOT_AUTHORIZED) {
2855 sta->tx_packets++;
2856 sta->tx_bytes += skb->len;
2857 sta->last_tx = jiffies;
2858 }
2859
2860 if ((ret == AP_TX_CONTINUE ||
2861 ret == AP_TX_CONTINUE_NOT_AUTHORIZED) &&
2862 sta->crypt && tx->host_encrypt) {
2863 tx->crypt = sta->crypt;
2864 tx->sta_ptr = sta; /* hostap_handle_sta_release() will
2865 * be called to release sta info
2866 * later */
2867 } else
2868 atomic_dec(&sta->users);
2869 }
2870
2871 return ret;
2872 }
2873
2874
hostap_handle_sta_release(void * ptr)2875 void hostap_handle_sta_release(void *ptr)
2876 {
2877 struct sta_info *sta = ptr;
2878 atomic_dec(&sta->users);
2879 }
2880
2881
2882 /* Called only as a tasklet (software IRQ) */
hostap_handle_sta_tx_exc(local_info_t * local,struct sk_buff * skb)2883 void hostap_handle_sta_tx_exc(local_info_t *local, struct sk_buff *skb)
2884 {
2885 struct sta_info *sta;
2886 struct ieee80211_hdr *hdr;
2887 struct hostap_skb_tx_data *meta;
2888
2889 hdr = (struct ieee80211_hdr *) skb->data;
2890 meta = (struct hostap_skb_tx_data *) skb->cb;
2891
2892 spin_lock(&local->ap->sta_table_lock);
2893 sta = ap_get_sta(local->ap, hdr->addr1);
2894 if (!sta) {
2895 spin_unlock(&local->ap->sta_table_lock);
2896 PDEBUG(DEBUG_AP, "%s: Could not find STA %pM"
2897 " for this TX error (@%lu)\n",
2898 local->dev->name, hdr->addr1, jiffies);
2899 return;
2900 }
2901
2902 sta->tx_since_last_failure = 0;
2903 sta->tx_consecutive_exc++;
2904
2905 if (sta->tx_consecutive_exc >= WLAN_RATE_DECREASE_THRESHOLD &&
2906 sta->tx_rate_idx > 0 && meta->rate <= sta->tx_rate) {
2907 /* use next lower rate */
2908 int old, rate;
2909 old = rate = sta->tx_rate_idx;
2910 while (rate > 0) {
2911 rate--;
2912 if (ap_tx_rate_ok(rate, sta, local)) {
2913 sta->tx_rate_idx = rate;
2914 break;
2915 }
2916 }
2917 if (old != sta->tx_rate_idx) {
2918 switch (sta->tx_rate_idx) {
2919 case 0: sta->tx_rate = 10; break;
2920 case 1: sta->tx_rate = 20; break;
2921 case 2: sta->tx_rate = 55; break;
2922 case 3: sta->tx_rate = 110; break;
2923 default: sta->tx_rate = 0; break;
2924 }
2925 PDEBUG(DEBUG_AP,
2926 "%s: STA %pM TX rate lowered to %d\n",
2927 local->dev->name, sta->addr, sta->tx_rate);
2928 }
2929 sta->tx_consecutive_exc = 0;
2930 }
2931 spin_unlock(&local->ap->sta_table_lock);
2932 }
2933
2934
hostap_update_sta_ps2(local_info_t * local,struct sta_info * sta,int pwrmgt,int type,int stype)2935 static void hostap_update_sta_ps2(local_info_t *local, struct sta_info *sta,
2936 int pwrmgt, int type, int stype)
2937 {
2938 if (pwrmgt && !(sta->flags & WLAN_STA_PS)) {
2939 sta->flags |= WLAN_STA_PS;
2940 PDEBUG(DEBUG_PS2, "STA %pM changed to use PS "
2941 "mode (type=0x%02X, stype=0x%02X)\n",
2942 sta->addr, type >> 2, stype >> 4);
2943 } else if (!pwrmgt && (sta->flags & WLAN_STA_PS)) {
2944 sta->flags &= ~WLAN_STA_PS;
2945 PDEBUG(DEBUG_PS2, "STA %pM changed to not use "
2946 "PS mode (type=0x%02X, stype=0x%02X)\n",
2947 sta->addr, type >> 2, stype >> 4);
2948 if (type != IEEE80211_FTYPE_CTL ||
2949 stype != IEEE80211_STYPE_PSPOLL)
2950 schedule_packet_send(local, sta);
2951 }
2952 }
2953
2954
2955 /* Called only as a tasklet (software IRQ). Called for each RX frame to update
2956 * STA power saving state. pwrmgt is a flag from 802.11 frame_control field. */
hostap_update_sta_ps(local_info_t * local,struct ieee80211_hdr * hdr)2957 int hostap_update_sta_ps(local_info_t *local, struct ieee80211_hdr *hdr)
2958 {
2959 struct sta_info *sta;
2960 u16 fc;
2961
2962 spin_lock(&local->ap->sta_table_lock);
2963 sta = ap_get_sta(local->ap, hdr->addr2);
2964 if (sta)
2965 atomic_inc(&sta->users);
2966 spin_unlock(&local->ap->sta_table_lock);
2967
2968 if (!sta)
2969 return -1;
2970
2971 fc = le16_to_cpu(hdr->frame_control);
2972 hostap_update_sta_ps2(local, sta, fc & IEEE80211_FCTL_PM,
2973 fc & IEEE80211_FCTL_FTYPE,
2974 fc & IEEE80211_FCTL_STYPE);
2975
2976 atomic_dec(&sta->users);
2977 return 0;
2978 }
2979
2980
2981 /* Called only as a tasklet (software IRQ). Called for each RX frame after
2982 * getting RX header and payload from hardware. */
hostap_handle_sta_rx(local_info_t * local,struct net_device * dev,struct sk_buff * skb,struct hostap_80211_rx_status * rx_stats,int wds)2983 ap_rx_ret hostap_handle_sta_rx(local_info_t *local, struct net_device *dev,
2984 struct sk_buff *skb,
2985 struct hostap_80211_rx_status *rx_stats,
2986 int wds)
2987 {
2988 int ret;
2989 struct sta_info *sta;
2990 u16 fc, type, stype;
2991 struct ieee80211_hdr *hdr;
2992
2993 if (local->ap == NULL)
2994 return AP_RX_CONTINUE;
2995
2996 hdr = (struct ieee80211_hdr *) skb->data;
2997
2998 fc = le16_to_cpu(hdr->frame_control);
2999 type = fc & IEEE80211_FCTL_FTYPE;
3000 stype = fc & IEEE80211_FCTL_STYPE;
3001
3002 spin_lock(&local->ap->sta_table_lock);
3003 sta = ap_get_sta(local->ap, hdr->addr2);
3004 if (sta)
3005 atomic_inc(&sta->users);
3006 spin_unlock(&local->ap->sta_table_lock);
3007
3008 if (sta && !(sta->flags & WLAN_STA_AUTHORIZED))
3009 ret = AP_RX_CONTINUE_NOT_AUTHORIZED;
3010 else
3011 ret = AP_RX_CONTINUE;
3012
3013
3014 if (fc & IEEE80211_FCTL_TODS) {
3015 if (!wds && (sta == NULL || !(sta->flags & WLAN_STA_ASSOC))) {
3016 if (local->hostapd) {
3017 prism2_rx_80211(local->apdev, skb, rx_stats,
3018 PRISM2_RX_NON_ASSOC);
3019 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
3020 } else {
3021 printk(KERN_DEBUG "%s: dropped received packet"
3022 " from non-associated STA %pM"
3023 " (type=0x%02x, subtype=0x%02x)\n",
3024 dev->name, hdr->addr2,
3025 type >> 2, stype >> 4);
3026 hostap_rx(dev, skb, rx_stats);
3027 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
3028 }
3029 ret = AP_RX_EXIT;
3030 goto out;
3031 }
3032 } else if (fc & IEEE80211_FCTL_FROMDS) {
3033 if (!wds) {
3034 /* FromDS frame - not for us; probably
3035 * broadcast/multicast in another BSS - drop */
3036 if (ether_addr_equal(hdr->addr1, dev->dev_addr)) {
3037 printk(KERN_DEBUG "Odd.. FromDS packet "
3038 "received with own BSSID\n");
3039 hostap_dump_rx_80211(dev->name, skb, rx_stats);
3040 }
3041 ret = AP_RX_DROP;
3042 goto out;
3043 }
3044 } else if (stype == IEEE80211_STYPE_NULLFUNC && sta == NULL &&
3045 ether_addr_equal(hdr->addr1, dev->dev_addr)) {
3046
3047 if (local->hostapd) {
3048 prism2_rx_80211(local->apdev, skb, rx_stats,
3049 PRISM2_RX_NON_ASSOC);
3050 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
3051 } else {
3052 /* At least Lucent f/w seems to send data::nullfunc
3053 * frames with no ToDS flag when the current AP returns
3054 * after being unavailable for some time. Speed up
3055 * re-association by informing the station about it not
3056 * being associated. */
3057 printk(KERN_DEBUG "%s: rejected received nullfunc frame"
3058 " without ToDS from not associated STA %pM\n",
3059 dev->name, hdr->addr2);
3060 hostap_rx(dev, skb, rx_stats);
3061 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
3062 }
3063 ret = AP_RX_EXIT;
3064 goto out;
3065 } else if (stype == IEEE80211_STYPE_NULLFUNC) {
3066 /* At least Lucent cards seem to send periodic nullfunc
3067 * frames with ToDS. Let these through to update SQ
3068 * stats and PS state. Nullfunc frames do not contain
3069 * any data and they will be dropped below. */
3070 } else {
3071 /* If BSSID (Addr3) is foreign, this frame is a normal
3072 * broadcast frame from an IBSS network. Drop it silently.
3073 * If BSSID is own, report the dropping of this frame. */
3074 if (ether_addr_equal(hdr->addr3, dev->dev_addr)) {
3075 printk(KERN_DEBUG "%s: dropped received packet from %pM"
3076 " with no ToDS flag "
3077 "(type=0x%02x, subtype=0x%02x)\n", dev->name,
3078 hdr->addr2, type >> 2, stype >> 4);
3079 hostap_dump_rx_80211(dev->name, skb, rx_stats);
3080 }
3081 ret = AP_RX_DROP;
3082 goto out;
3083 }
3084
3085 if (sta) {
3086 hostap_update_sta_ps2(local, sta, fc & IEEE80211_FCTL_PM,
3087 type, stype);
3088
3089 sta->rx_packets++;
3090 sta->rx_bytes += skb->len;
3091 sta->last_rx = jiffies;
3092 }
3093
3094 if (local->ap->nullfunc_ack && stype == IEEE80211_STYPE_NULLFUNC &&
3095 fc & IEEE80211_FCTL_TODS) {
3096 if (local->hostapd) {
3097 prism2_rx_80211(local->apdev, skb, rx_stats,
3098 PRISM2_RX_NULLFUNC_ACK);
3099 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
3100 } else {
3101 /* some STA f/w's seem to require control::ACK frame
3102 * for data::nullfunc, but Prism2 f/w 0.8.0 (at least
3103 * from Compaq) does not send this.. Try to generate
3104 * ACK for these frames from the host driver to make
3105 * power saving work with, e.g., Lucent WaveLAN f/w */
3106 hostap_rx(dev, skb, rx_stats);
3107 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
3108 }
3109 ret = AP_RX_EXIT;
3110 goto out;
3111 }
3112
3113 out:
3114 if (sta)
3115 atomic_dec(&sta->users);
3116
3117 return ret;
3118 }
3119
3120
3121 /* Called only as a tasklet (software IRQ) */
hostap_handle_sta_crypto(local_info_t * local,struct ieee80211_hdr * hdr,struct lib80211_crypt_data ** crypt,void ** sta_ptr)3122 int hostap_handle_sta_crypto(local_info_t *local,
3123 struct ieee80211_hdr *hdr,
3124 struct lib80211_crypt_data **crypt,
3125 void **sta_ptr)
3126 {
3127 struct sta_info *sta;
3128
3129 spin_lock(&local->ap->sta_table_lock);
3130 sta = ap_get_sta(local->ap, hdr->addr2);
3131 if (sta)
3132 atomic_inc(&sta->users);
3133 spin_unlock(&local->ap->sta_table_lock);
3134
3135 if (!sta)
3136 return -1;
3137
3138 if (sta->crypt) {
3139 *crypt = sta->crypt;
3140 *sta_ptr = sta;
3141 /* hostap_handle_sta_release() will be called to release STA
3142 * info */
3143 } else
3144 atomic_dec(&sta->users);
3145
3146 return 0;
3147 }
3148
3149
3150 /* Called only as a tasklet (software IRQ) */
hostap_is_sta_assoc(struct ap_data * ap,u8 * sta_addr)3151 int hostap_is_sta_assoc(struct ap_data *ap, u8 *sta_addr)
3152 {
3153 struct sta_info *sta;
3154 int ret = 0;
3155
3156 spin_lock(&ap->sta_table_lock);
3157 sta = ap_get_sta(ap, sta_addr);
3158 if (sta != NULL && (sta->flags & WLAN_STA_ASSOC) && !sta->ap)
3159 ret = 1;
3160 spin_unlock(&ap->sta_table_lock);
3161
3162 return ret;
3163 }
3164
3165
3166 /* Called only as a tasklet (software IRQ) */
hostap_is_sta_authorized(struct ap_data * ap,u8 * sta_addr)3167 int hostap_is_sta_authorized(struct ap_data *ap, u8 *sta_addr)
3168 {
3169 struct sta_info *sta;
3170 int ret = 0;
3171
3172 spin_lock(&ap->sta_table_lock);
3173 sta = ap_get_sta(ap, sta_addr);
3174 if (sta != NULL && (sta->flags & WLAN_STA_ASSOC) && !sta->ap &&
3175 ((sta->flags & WLAN_STA_AUTHORIZED) ||
3176 ap->local->ieee_802_1x == 0))
3177 ret = 1;
3178 spin_unlock(&ap->sta_table_lock);
3179
3180 return ret;
3181 }
3182
3183
3184 /* Called only as a tasklet (software IRQ) */
hostap_add_sta(struct ap_data * ap,u8 * sta_addr)3185 int hostap_add_sta(struct ap_data *ap, u8 *sta_addr)
3186 {
3187 struct sta_info *sta;
3188 int ret = 1;
3189
3190 if (!ap)
3191 return -1;
3192
3193 spin_lock(&ap->sta_table_lock);
3194 sta = ap_get_sta(ap, sta_addr);
3195 if (sta)
3196 ret = 0;
3197 spin_unlock(&ap->sta_table_lock);
3198
3199 if (ret == 1) {
3200 sta = ap_add_sta(ap, sta_addr);
3201 if (!sta)
3202 return -1;
3203 sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
3204 sta->ap = 1;
3205 memset(sta->supported_rates, 0, sizeof(sta->supported_rates));
3206 /* No way of knowing which rates are supported since we did not
3207 * get supported rates element from beacon/assoc req. Assume
3208 * that remote end supports all 802.11b rates. */
3209 sta->supported_rates[0] = 0x82;
3210 sta->supported_rates[1] = 0x84;
3211 sta->supported_rates[2] = 0x0b;
3212 sta->supported_rates[3] = 0x16;
3213 sta->tx_supp_rates = WLAN_RATE_1M | WLAN_RATE_2M |
3214 WLAN_RATE_5M5 | WLAN_RATE_11M;
3215 sta->tx_rate = 110;
3216 sta->tx_max_rate = sta->tx_rate_idx = 3;
3217 }
3218
3219 return ret;
3220 }
3221
3222
3223 /* Called only as a tasklet (software IRQ) */
hostap_update_rx_stats(struct ap_data * ap,struct ieee80211_hdr * hdr,struct hostap_80211_rx_status * rx_stats)3224 int hostap_update_rx_stats(struct ap_data *ap,
3225 struct ieee80211_hdr *hdr,
3226 struct hostap_80211_rx_status *rx_stats)
3227 {
3228 struct sta_info *sta;
3229
3230 if (!ap)
3231 return -1;
3232
3233 spin_lock(&ap->sta_table_lock);
3234 sta = ap_get_sta(ap, hdr->addr2);
3235 if (sta) {
3236 sta->last_rx_silence = rx_stats->noise;
3237 sta->last_rx_signal = rx_stats->signal;
3238 sta->last_rx_rate = rx_stats->rate;
3239 sta->last_rx_updated = IW_QUAL_ALL_UPDATED | IW_QUAL_DBM;
3240 if (rx_stats->rate == 10)
3241 sta->rx_count[0]++;
3242 else if (rx_stats->rate == 20)
3243 sta->rx_count[1]++;
3244 else if (rx_stats->rate == 55)
3245 sta->rx_count[2]++;
3246 else if (rx_stats->rate == 110)
3247 sta->rx_count[3]++;
3248 }
3249 spin_unlock(&ap->sta_table_lock);
3250
3251 return sta ? 0 : -1;
3252 }
3253
3254
hostap_update_rates(local_info_t * local)3255 void hostap_update_rates(local_info_t *local)
3256 {
3257 struct sta_info *sta;
3258 struct ap_data *ap = local->ap;
3259
3260 if (!ap)
3261 return;
3262
3263 spin_lock_bh(&ap->sta_table_lock);
3264 list_for_each_entry(sta, &ap->sta_list, list) {
3265 prism2_check_tx_rates(sta);
3266 }
3267 spin_unlock_bh(&ap->sta_table_lock);
3268 }
3269
3270
ap_crypt_get_ptrs(struct ap_data * ap,u8 * addr,int permanent,struct lib80211_crypt_data *** crypt)3271 void * ap_crypt_get_ptrs(struct ap_data *ap, u8 *addr, int permanent,
3272 struct lib80211_crypt_data ***crypt)
3273 {
3274 struct sta_info *sta;
3275
3276 spin_lock_bh(&ap->sta_table_lock);
3277 sta = ap_get_sta(ap, addr);
3278 if (sta)
3279 atomic_inc(&sta->users);
3280 spin_unlock_bh(&ap->sta_table_lock);
3281
3282 if (!sta && permanent)
3283 sta = ap_add_sta(ap, addr);
3284
3285 if (!sta)
3286 return NULL;
3287
3288 if (permanent)
3289 sta->flags |= WLAN_STA_PERM;
3290
3291 *crypt = &sta->crypt;
3292
3293 return sta;
3294 }
3295
3296
hostap_add_wds_links(local_info_t * local)3297 void hostap_add_wds_links(local_info_t *local)
3298 {
3299 struct ap_data *ap = local->ap;
3300 struct sta_info *sta;
3301
3302 spin_lock_bh(&ap->sta_table_lock);
3303 list_for_each_entry(sta, &ap->sta_list, list) {
3304 if (sta->ap)
3305 hostap_wds_link_oper(local, sta->addr, WDS_ADD);
3306 }
3307 spin_unlock_bh(&ap->sta_table_lock);
3308
3309 schedule_work(&local->ap->wds_oper_queue);
3310 }
3311
3312
hostap_wds_link_oper(local_info_t * local,u8 * addr,wds_oper_type type)3313 void hostap_wds_link_oper(local_info_t *local, u8 *addr, wds_oper_type type)
3314 {
3315 struct wds_oper_data *entry;
3316
3317 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
3318 if (!entry)
3319 return;
3320 memcpy(entry->addr, addr, ETH_ALEN);
3321 entry->type = type;
3322 spin_lock_bh(&local->lock);
3323 entry->next = local->ap->wds_oper_entries;
3324 local->ap->wds_oper_entries = entry;
3325 spin_unlock_bh(&local->lock);
3326
3327 schedule_work(&local->ap->wds_oper_queue);
3328 }
3329
3330
3331 EXPORT_SYMBOL(hostap_init_data);
3332 EXPORT_SYMBOL(hostap_init_ap_proc);
3333 EXPORT_SYMBOL(hostap_free_data);
3334 EXPORT_SYMBOL(hostap_check_sta_fw_version);
3335 EXPORT_SYMBOL(hostap_handle_sta_tx_exc);
3336 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
3337 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
3338