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[linux-2.6-block.git] / drivers / net / wireless / hostap / hostap_ap.c
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ff1d2767
JM		 1/*
2 * Intersil Prism2 driver with Host AP (software access point) support
3 * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
4 * <jkmaline@cc.hut.fi>
62fe7e37 5 * Copyright (c) 2002-2005, Jouni Malinen <jkmaline@cc.hut.fi>
ff1d2767
JM		 6 *
7 * This file is to be included into hostap.c when S/W AP functionality is
8 * compiled.
9 *
10 * AP: FIX:
11 * - if unicast Class 2 (assoc,reassoc,disassoc) frame received from
12 * unauthenticated STA, send deauth. frame (8802.11: 5.5)
13 * - if unicast Class 3 (data with to/from DS,deauth,pspoll) frame received
14 * from authenticated, but unassoc STA, send disassoc frame (8802.11: 5.5)
15 * - if unicast Class 3 received from unauthenticated STA, send deauth. frame
16 * (8802.11: 5.5)
17 */
18
5fad5a2e
AB		 19#include <linux/proc_fs.h>
20#include <linux/delay.h>
21#include <linux/random.h>
22
23#include "hostap_wlan.h"
24#include "hostap.h"
25#include "hostap_ap.h"
26
ff1d2767
JM		 27static int other_ap_policy[MAX_PARM_DEVICES] = { AP_OTHER_AP_SKIP_ALL,
28 DEF_INTS };
29module_param_array(other_ap_policy, int, NULL, 0444);
30MODULE_PARM_DESC(other_ap_policy, "Other AP beacon monitoring policy (0-3)");
31
32static int ap_max_inactivity[MAX_PARM_DEVICES] = { AP_MAX_INACTIVITY_SEC,
33 DEF_INTS };
34module_param_array(ap_max_inactivity, int, NULL, 0444);
35MODULE_PARM_DESC(ap_max_inactivity, "AP timeout (in seconds) for station "
36 "inactivity");
37
38static int ap_bridge_packets[MAX_PARM_DEVICES] = { 1, DEF_INTS };
39module_param_array(ap_bridge_packets, int, NULL, 0444);
40MODULE_PARM_DESC(ap_bridge_packets, "Bridge packets directly between "
41 "stations");
42
43static int autom_ap_wds[MAX_PARM_DEVICES] = { 0, DEF_INTS };
44module_param_array(autom_ap_wds, int, NULL, 0444);
45MODULE_PARM_DESC(autom_ap_wds, "Add WDS connections to other APs "
46 "automatically");
47
48
49static struct sta_info* ap_get_sta(struct ap_data *ap, u8 *sta);
50static void hostap_event_expired_sta(struct net_device *dev,
51 struct sta_info *sta);
c4028958 52static void handle_add_proc_queue(struct work_struct *work);
ff1d2767
JM		 53
54#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
c4028958 55static void handle_wds_oper_queue(struct work_struct *work);
ff1d2767 56static void prism2_send_mgmt(struct net_device *dev,
4339d328 57 u16 type_subtype, char *body,
ff1d2767
JM		 58 int body_len, u8 *addr, u16 tx_cb_idx);
59#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
60
61
62#ifndef PRISM2_NO_PROCFS_DEBUG
63static int ap_debug_proc_read(char *page, char **start, off_t off,
64 int count, int *eof, void *data)
65{
66 char *p = page;
67 struct ap_data *ap = (struct ap_data *) data;
68
69 if (off != 0) {
70 *eof = 1;
71 return 0;
72 }
73
74 p += sprintf(p, "BridgedUnicastFrames=%u\n", ap->bridged_unicast);
75 p += sprintf(p, "BridgedMulticastFrames=%u\n", ap->bridged_multicast);
76 p += sprintf(p, "max_inactivity=%u\n", ap->max_inactivity / HZ);
77 p += sprintf(p, "bridge_packets=%u\n", ap->bridge_packets);
78 p += sprintf(p, "nullfunc_ack=%u\n", ap->nullfunc_ack);
79 p += sprintf(p, "autom_ap_wds=%u\n", ap->autom_ap_wds);
80 p += sprintf(p, "auth_algs=%u\n", ap->local->auth_algs);
81 p += sprintf(p, "tx_drop_nonassoc=%u\n", ap->tx_drop_nonassoc);
82
83 return (p - page);
84}
85#endif /* PRISM2_NO_PROCFS_DEBUG */
86
87
88static void ap_sta_hash_add(struct ap_data *ap, struct sta_info *sta)
89{
90 sta->hnext = ap->sta_hash[STA_HASH(sta->addr)];
91 ap->sta_hash[STA_HASH(sta->addr)] = sta;
92}
93
94static void ap_sta_hash_del(struct ap_data *ap, struct sta_info *sta)
95{
96 struct sta_info *s;
97
98 s = ap->sta_hash[STA_HASH(sta->addr)];
99 if (s == NULL) return;
100 if (memcmp(s->addr, sta->addr, ETH_ALEN) == 0) {
101 ap->sta_hash[STA_HASH(sta->addr)] = s->hnext;
102 return;
103 }
104
105 while (s->hnext != NULL && memcmp(s->hnext->addr, sta->addr, ETH_ALEN)
106 != 0)
107 s = s->hnext;
108 if (s->hnext != NULL)
109 s->hnext = s->hnext->hnext;
110 else
111 printk("AP: could not remove STA " MACSTR " from hash table\n",
112 MAC2STR(sta->addr));
113}
114
115static void ap_free_sta(struct ap_data *ap, struct sta_info *sta)
116{
117 if (sta->ap && sta->local)
118 hostap_event_expired_sta(sta->local->dev, sta);
119
120 if (ap->proc != NULL) {
121 char name[20];
122 sprintf(name, MACSTR, MAC2STR(sta->addr));
123 remove_proc_entry(name, ap->proc);
124 }
125
126 if (sta->crypt) {
127 sta->crypt->ops->deinit(sta->crypt->priv);
128 kfree(sta->crypt);
129 sta->crypt = NULL;
130 }
131
132 skb_queue_purge(&sta->tx_buf);
133
134 ap->num_sta--;
135#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
136 if (sta->aid > 0)
137 ap->sta_aid[sta->aid - 1] = NULL;
138
139 if (!sta->ap && sta->u.sta.challenge)
140 kfree(sta->u.sta.challenge);
141 del_timer(&sta->timer);
142#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
143
144 kfree(sta);
145}
146
147
148static void hostap_set_tim(local_info_t *local, int aid, int set)
149{
150 if (local->func->set_tim)
151 local->func->set_tim(local->dev, aid, set);
152}
153
154
155static void hostap_event_new_sta(struct net_device *dev, struct sta_info *sta)
156{
157 union iwreq_data wrqu;
158 memset(&wrqu, 0, sizeof(wrqu));
159 memcpy(wrqu.addr.sa_data, sta->addr, ETH_ALEN);
160 wrqu.addr.sa_family = ARPHRD_ETHER;
161 wireless_send_event(dev, IWEVREGISTERED, &wrqu, NULL);
162}
163
164
165static void hostap_event_expired_sta(struct net_device *dev,
166 struct sta_info *sta)
167{
168 union iwreq_data wrqu;
169 memset(&wrqu, 0, sizeof(wrqu));
170 memcpy(wrqu.addr.sa_data, sta->addr, ETH_ALEN);
171 wrqu.addr.sa_family = ARPHRD_ETHER;
172 wireless_send_event(dev, IWEVEXPIRED, &wrqu, NULL);
173}
174
175
176#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
177
178static void ap_handle_timer(unsigned long data)
179{
180 struct sta_info *sta = (struct sta_info *) data;
181 local_info_t *local;
182 struct ap_data *ap;
183 unsigned long next_time = 0;
184 int was_assoc;
185
186 if (sta == NULL || sta->local == NULL || sta->local->ap == NULL) {
187 PDEBUG(DEBUG_AP, "ap_handle_timer() called with NULL data\n");
188 return;
189 }
190
191 local = sta->local;
192 ap = local->ap;
193 was_assoc = sta->flags & WLAN_STA_ASSOC;
194
195 if (atomic_read(&sta->users) != 0)
196 next_time = jiffies + HZ;
197 else if ((sta->flags & WLAN_STA_PERM) && !(sta->flags & WLAN_STA_AUTH))
198 next_time = jiffies + ap->max_inactivity;
199
200 if (time_before(jiffies, sta->last_rx + ap->max_inactivity)) {
201 /* station activity detected; reset timeout state */
202 sta->timeout_next = STA_NULLFUNC;
203 next_time = sta->last_rx + ap->max_inactivity;
204 } else if (sta->timeout_next == STA_DISASSOC &&
205 !(sta->flags & WLAN_STA_PENDING_POLL)) {
206 /* STA ACKed data nullfunc frame poll */
207 sta->timeout_next = STA_NULLFUNC;
208 next_time = jiffies + ap->max_inactivity;
209 }
210
211 if (next_time) {
212 sta->timer.expires = next_time;
213 add_timer(&sta->timer);
214 return;
215 }
216
217 if (sta->ap)
218 sta->timeout_next = STA_DEAUTH;
219
220 if (sta->timeout_next == STA_DEAUTH && !(sta->flags & WLAN_STA_PERM)) {
221 spin_lock(&ap->sta_table_lock);
222 ap_sta_hash_del(ap, sta);
223 list_del(&sta->list);
224 spin_unlock(&ap->sta_table_lock);
225 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
226 } else if (sta->timeout_next == STA_DISASSOC)
227 sta->flags &= ~WLAN_STA_ASSOC;
228
229 if (was_assoc && !(sta->flags & WLAN_STA_ASSOC) && !sta->ap)
230 hostap_event_expired_sta(local->dev, sta);
231
232 if (sta->timeout_next == STA_DEAUTH && sta->aid > 0 &&
233 !skb_queue_empty(&sta->tx_buf)) {
234 hostap_set_tim(local, sta->aid, 0);
235 sta->flags &= ~WLAN_STA_TIM;
236 }
237
238 if (sta->ap) {
239 if (ap->autom_ap_wds) {
240 PDEBUG(DEBUG_AP, "%s: removing automatic WDS "
241 "connection to AP " MACSTR "\n",
242 local->dev->name, MAC2STR(sta->addr));
243 hostap_wds_link_oper(local, sta->addr, WDS_DEL);
244 }
245 } else if (sta->timeout_next == STA_NULLFUNC) {
246 /* send data frame to poll STA and check whether this frame
247 * is ACKed */
4339d328 248 /* FIX: IEEE80211_STYPE_NULLFUNC would be more appropriate, but
ff1d2767
JM		 249 * it is apparently not retried so TX Exc events are not
250 * received for it */
251 sta->flags |= WLAN_STA_PENDING_POLL;
4339d328
JM		 252 prism2_send_mgmt(local->dev, IEEE80211_FTYPE_DATA |
253 IEEE80211_STYPE_DATA, NULL, 0,
ff1d2767
JM		 254 sta->addr, ap->tx_callback_poll);
255 } else {
256 int deauth = sta->timeout_next == STA_DEAUTH;
257 u16 resp;
258 PDEBUG(DEBUG_AP, "%s: sending %s info to STA " MACSTR
259 "(last=%lu, jiffies=%lu)\n",
260 local->dev->name,
261 deauth ? "deauthentication" : "disassociation",
262 MAC2STR(sta->addr), sta->last_rx, jiffies);
263
264 resp = cpu_to_le16(deauth ? WLAN_REASON_PREV_AUTH_NOT_VALID :
265 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
4339d328
JM		 266 prism2_send_mgmt(local->dev, IEEE80211_FTYPE_MGMT |
267 (deauth ? IEEE80211_STYPE_DEAUTH :
268 IEEE80211_STYPE_DISASSOC),
ff1d2767
JM		 269 (char *) &resp, 2, sta->addr, 0);
270 }
271
272 if (sta->timeout_next == STA_DEAUTH) {
273 if (sta->flags & WLAN_STA_PERM) {
274 PDEBUG(DEBUG_AP, "%s: STA " MACSTR " would have been "
275 "removed, but it has 'perm' flag\n",
276 local->dev->name, MAC2STR(sta->addr));
277 } else
278 ap_free_sta(ap, sta);
279 return;
280 }
281
282 if (sta->timeout_next == STA_NULLFUNC) {
283 sta->timeout_next = STA_DISASSOC;
284 sta->timer.expires = jiffies + AP_DISASSOC_DELAY;
285 } else {
286 sta->timeout_next = STA_DEAUTH;
287 sta->timer.expires = jiffies + AP_DEAUTH_DELAY;
288 }
289
290 add_timer(&sta->timer);
291}
292
293
294void hostap_deauth_all_stas(struct net_device *dev, struct ap_data *ap,
295 int resend)
296{
297 u8 addr[ETH_ALEN];
298 u16 resp;
299 int i;
300
301 PDEBUG(DEBUG_AP, "%s: Deauthenticate all stations\n", dev->name);
302 memset(addr, 0xff, ETH_ALEN);
303
304 resp = __constant_cpu_to_le16(WLAN_REASON_PREV_AUTH_NOT_VALID);
305
306 /* deauth message sent; try to resend it few times; the message is
307 * broadcast, so it may be delayed until next DTIM; there is not much
308 * else we can do at this point since the driver is going to be shut
309 * down */
310 for (i = 0; i < 5; i++) {
4339d328
JM		 311 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT |
312 IEEE80211_STYPE_DEAUTH,
ff1d2767
JM		 313 (char *) &resp, 2, addr, 0);
314
315 if (!resend || ap->num_sta <= 0)
316 return;
317
318 mdelay(50);
319 }
320}
321
322
323static int ap_control_proc_read(char *page, char **start, off_t off,
324 int count, int *eof, void *data)
325{
326 char *p = page;
327 struct ap_data *ap = (struct ap_data *) data;
328 char *policy_txt;
329 struct list_head *ptr;
330 struct mac_entry *entry;
331
332 if (off != 0) {
333 *eof = 1;
334 return 0;
335 }
336
337 switch (ap->mac_restrictions.policy) {
338 case MAC_POLICY_OPEN:
339 policy_txt = "open";
340 break;
341 case MAC_POLICY_ALLOW:
342 policy_txt = "allow";
343 break;
344 case MAC_POLICY_DENY:
345 policy_txt = "deny";
346 break;
347 default:
348 policy_txt = "unknown";
349 break;
350 };
351 p += sprintf(p, "MAC policy: %s\n", policy_txt);
352 p += sprintf(p, "MAC entries: %u\n", ap->mac_restrictions.entries);
353 p += sprintf(p, "MAC list:\n");
354 spin_lock_bh(&ap->mac_restrictions.lock);
355 for (ptr = ap->mac_restrictions.mac_list.next;
356 ptr != &ap->mac_restrictions.mac_list; ptr = ptr->next) {
357 if (p - page > PAGE_SIZE - 80) {
358 p += sprintf(p, "All entries did not fit one page.\n");
359 break;
360 }
361
362 entry = list_entry(ptr, struct mac_entry, list);
363 p += sprintf(p, MACSTR "\n", MAC2STR(entry->addr));
364 }
365 spin_unlock_bh(&ap->mac_restrictions.lock);
366
367 return (p - page);
368}
369
370
5fad5a2e 371int ap_control_add_mac(struct mac_restrictions *mac_restrictions, u8 *mac)
ff1d2767
JM		 372{
373 struct mac_entry *entry;
374
375 entry = kmalloc(sizeof(struct mac_entry), GFP_KERNEL);
376 if (entry == NULL)
377 return -1;
378
379 memcpy(entry->addr, mac, ETH_ALEN);
380
381 spin_lock_bh(&mac_restrictions->lock);
382 list_add_tail(&entry->list, &mac_restrictions->mac_list);
383 mac_restrictions->entries++;
384 spin_unlock_bh(&mac_restrictions->lock);
385
386 return 0;
387}
388
389
5fad5a2e 390int ap_control_del_mac(struct mac_restrictions *mac_restrictions, u8 *mac)
ff1d2767
JM		 391{
392 struct list_head *ptr;
393 struct mac_entry *entry;
394
395 spin_lock_bh(&mac_restrictions->lock);
396 for (ptr = mac_restrictions->mac_list.next;
397 ptr != &mac_restrictions->mac_list; ptr = ptr->next) {
398 entry = list_entry(ptr, struct mac_entry, list);
399
400 if (memcmp(entry->addr, mac, ETH_ALEN) == 0) {
401 list_del(ptr);
402 kfree(entry);
403 mac_restrictions->entries--;
404 spin_unlock_bh(&mac_restrictions->lock);
405 return 0;
406 }
407 }
408 spin_unlock_bh(&mac_restrictions->lock);
409 return -1;
410}
411
412
413static int ap_control_mac_deny(struct mac_restrictions *mac_restrictions,
414 u8 *mac)
415{
416 struct list_head *ptr;
417 struct mac_entry *entry;
418 int found = 0;
419
420 if (mac_restrictions->policy == MAC_POLICY_OPEN)
421 return 0;
422
423 spin_lock_bh(&mac_restrictions->lock);
424 for (ptr = mac_restrictions->mac_list.next;
425 ptr != &mac_restrictions->mac_list; ptr = ptr->next) {
426 entry = list_entry(ptr, struct mac_entry, list);
427
428 if (memcmp(entry->addr, mac, ETH_ALEN) == 0) {
429 found = 1;
430 break;
431 }
432 }
433 spin_unlock_bh(&mac_restrictions->lock);
434
435 if (mac_restrictions->policy == MAC_POLICY_ALLOW)
436 return !found;
437 else
438 return found;
439}
440
441
5fad5a2e 442void ap_control_flush_macs(struct mac_restrictions *mac_restrictions)
ff1d2767
JM		 443{
444 struct list_head *ptr, *n;
445 struct mac_entry *entry;
446
447 if (mac_restrictions->entries == 0)
448 return;
449
450 spin_lock_bh(&mac_restrictions->lock);
451 for (ptr = mac_restrictions->mac_list.next, n = ptr->next;
452 ptr != &mac_restrictions->mac_list;
453 ptr = n, n = ptr->next) {
454 entry = list_entry(ptr, struct mac_entry, list);
455 list_del(ptr);
456 kfree(entry);
457 }
458 mac_restrictions->entries = 0;
459 spin_unlock_bh(&mac_restrictions->lock);
460}
461
462
5fad5a2e 463int ap_control_kick_mac(struct ap_data *ap, struct net_device *dev, u8 *mac)
ff1d2767
JM		 464{
465 struct sta_info *sta;
466 u16 resp;
467
468 spin_lock_bh(&ap->sta_table_lock);
469 sta = ap_get_sta(ap, mac);
470 if (sta) {
471 ap_sta_hash_del(ap, sta);
472 list_del(&sta->list);
473 }
474 spin_unlock_bh(&ap->sta_table_lock);
475
476 if (!sta)
477 return -EINVAL;
478
479 resp = cpu_to_le16(WLAN_REASON_PREV_AUTH_NOT_VALID);
4339d328 480 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_DEAUTH,
ff1d2767
JM		 481 (char *) &resp, 2, sta->addr, 0);
482
483 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap)
484 hostap_event_expired_sta(dev, sta);
485
486 ap_free_sta(ap, sta);
487
488 return 0;
489}
490
491#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
492
493
5fad5a2e 494void ap_control_kickall(struct ap_data *ap)
ff1d2767
JM		 495{
496 struct list_head *ptr, *n;
497 struct sta_info *sta;
74fae82c 498
ff1d2767
JM		 499 spin_lock_bh(&ap->sta_table_lock);
500 for (ptr = ap->sta_list.next, n = ptr->next; ptr != &ap->sta_list;
501 ptr = n, n = ptr->next) {
502 sta = list_entry(ptr, struct sta_info, list);
503 ap_sta_hash_del(ap, sta);
504 list_del(&sta->list);
505 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
506 hostap_event_expired_sta(sta->local->dev, sta);
507 ap_free_sta(ap, sta);
508 }
509 spin_unlock_bh(&ap->sta_table_lock);
510}
511
512
513#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
514
515#define PROC_LIMIT (PAGE_SIZE - 80)
516
517static int prism2_ap_proc_read(char *page, char **start, off_t off,
518 int count, int *eof, void *data)
519{
520 char *p = page;
521 struct ap_data *ap = (struct ap_data *) data;
522 struct list_head *ptr;
523 int i;
524
525 if (off > PROC_LIMIT) {
526 *eof = 1;
527 return 0;
528 }
529
530 p += sprintf(p, "# BSSID CHAN SIGNAL NOISE RATE SSID FLAGS\n");
531 spin_lock_bh(&ap->sta_table_lock);
532 for (ptr = ap->sta_list.next; ptr != &ap->sta_list; ptr = ptr->next) {
533 struct sta_info *sta = (struct sta_info *) ptr;
534
535 if (!sta->ap)
536 continue;
537
538 p += sprintf(p, MACSTR " %d %d %d %d '", MAC2STR(sta->addr),
539 sta->u.ap.channel, sta->last_rx_signal,
540 sta->last_rx_silence, sta->last_rx_rate);
541 for (i = 0; i < sta->u.ap.ssid_len; i++)
542 p += sprintf(p, ((sta->u.ap.ssid[i] >= 32 &&
543 sta->u.ap.ssid[i] < 127) ?
544 "%c" : "<%02x>"),
545 sta->u.ap.ssid[i]);
546 p += sprintf(p, "'");
547 if (sta->capability & WLAN_CAPABILITY_ESS)
548 p += sprintf(p, " [ESS]");
549 if (sta->capability & WLAN_CAPABILITY_IBSS)
550 p += sprintf(p, " [IBSS]");
551 if (sta->capability & WLAN_CAPABILITY_PRIVACY)
552 p += sprintf(p, " [WEP]");
553 p += sprintf(p, "\n");
554
555 if ((p - page) > PROC_LIMIT) {
556 printk(KERN_DEBUG "hostap: ap proc did not fit\n");
557 break;
558 }
559 }
560 spin_unlock_bh(&ap->sta_table_lock);
561
562 if ((p - page) <= off) {
563 *eof = 1;
564 return 0;
565 }
566
567 *start = page + off;
568
569 return (p - page - off);
570}
571#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
572
573
574void hostap_check_sta_fw_version(struct ap_data *ap, int sta_fw_ver)
575{
576 if (!ap)
577 return;
578
579 if (sta_fw_ver == PRISM2_FW_VER(0,8,0)) {
580 PDEBUG(DEBUG_AP, "Using data::nullfunc ACK workaround - "
581 "firmware upgrade recommended\n");
582 ap->nullfunc_ack = 1;
583 } else
584 ap->nullfunc_ack = 0;
585
586 if (sta_fw_ver == PRISM2_FW_VER(1,4,2)) {
587 printk(KERN_WARNING "%s: Warning: secondary station firmware "
588 "version 1.4.2 does not seem to work in Host AP mode\n",
589 ap->local->dev->name);
590 }
591}
592
593
594/* Called only as a tasklet (software IRQ) */
595static void hostap_ap_tx_cb(struct sk_buff *skb, int ok, void *data)
596{
597 struct ap_data *ap = data;
598 u16 fc;
d041674d 599 struct ieee80211_hdr_4addr *hdr;
ff1d2767
JM		 600
601 if (!ap->local->hostapd || !ap->local->apdev) {
602 dev_kfree_skb(skb);
603 return;
604 }
605
d041674d 606 hdr = (struct ieee80211_hdr_4addr *) skb->data;
c0f72ca8 607 fc = le16_to_cpu(hdr->frame_ctl);
ff1d2767
JM		 608
609 /* Pass the TX callback frame to the hostapd; use 802.11 header version
610 * 1 to indicate failure (no ACK) and 2 success (frame ACKed) */
611
b2f4a2e3 612 fc &= ~IEEE80211_FCTL_VERS;
ff1d2767 613 fc |= ok ? BIT(1) : BIT(0);
c0f72ca8 614 hdr->frame_ctl = cpu_to_le16(fc);
ff1d2767
JM		 615
616 skb->dev = ap->local->apdev;
617 skb_pull(skb, hostap_80211_get_hdrlen(fc));
618 skb->pkt_type = PACKET_OTHERHOST;
619 skb->protocol = __constant_htons(ETH_P_802_2);
620 memset(skb->cb, 0, sizeof(skb->cb));
621 netif_rx(skb);
622}
623
624
625#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
626/* Called only as a tasklet (software IRQ) */
627static void hostap_ap_tx_cb_auth(struct sk_buff *skb, int ok, void *data)
628{
629 struct ap_data *ap = data;
630 struct net_device *dev = ap->local->dev;
d041674d 631 struct ieee80211_hdr_4addr *hdr;
ff1d2767
JM		 632 u16 fc, *pos, auth_alg, auth_transaction, status;
633 struct sta_info *sta = NULL;
634 char *txt = NULL;
635
636 if (ap->local->hostapd) {
637 dev_kfree_skb(skb);
638 return;
639 }
640
d041674d 641 hdr = (struct ieee80211_hdr_4addr *) skb->data;
c0f72ca8 642 fc = le16_to_cpu(hdr->frame_ctl);
4339d328
JM		 643 if (WLAN_FC_GET_TYPE(fc) != IEEE80211_FTYPE_MGMT ||
644 WLAN_FC_GET_STYPE(fc) != IEEE80211_STYPE_AUTH ||
ff1d2767
JM		 645 skb->len < IEEE80211_MGMT_HDR_LEN + 6) {
646 printk(KERN_DEBUG "%s: hostap_ap_tx_cb_auth received invalid "
647 "frame\n", dev->name);
648 dev_kfree_skb(skb);
649 return;
650 }
651
652 pos = (u16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
653 auth_alg = le16_to_cpu(*pos++);
654 auth_transaction = le16_to_cpu(*pos++);
655 status = le16_to_cpu(*pos++);
656
657 if (!ok) {
658 txt = "frame was not ACKed";
659 goto done;
660 }
661
662 spin_lock(&ap->sta_table_lock);
663 sta = ap_get_sta(ap, hdr->addr1);
664 if (sta)
665 atomic_inc(&sta->users);
666 spin_unlock(&ap->sta_table_lock);
667
668 if (!sta) {
669 txt = "STA not found";
670 goto done;
671 }
672
673 if (status == WLAN_STATUS_SUCCESS &&
674 ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 2) ||
675 (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 4))) {
676 txt = "STA authenticated";
677 sta->flags |= WLAN_STA_AUTH;
678 sta->last_auth = jiffies;
679 } else if (status != WLAN_STATUS_SUCCESS)
680 txt = "authentication failed";
681
682 done:
683 if (sta)
684 atomic_dec(&sta->users);
685 if (txt) {
686 PDEBUG(DEBUG_AP, "%s: " MACSTR " auth_cb - alg=%d trans#=%d "
687 "status=%d - %s\n",
688 dev->name, MAC2STR(hdr->addr1), auth_alg,
689 auth_transaction, status, txt);
690 }
691 dev_kfree_skb(skb);
692}
693
694
695/* Called only as a tasklet (software IRQ) */
696static void hostap_ap_tx_cb_assoc(struct sk_buff *skb, int ok, void *data)
697{
698 struct ap_data *ap = data;
699 struct net_device *dev = ap->local->dev;
d041674d 700 struct ieee80211_hdr_4addr *hdr;
ff1d2767
JM		 701 u16 fc, *pos, status;
702 struct sta_info *sta = NULL;
703 char *txt = NULL;
704
705 if (ap->local->hostapd) {
706 dev_kfree_skb(skb);
707 return;
708 }
709
d041674d 710 hdr = (struct ieee80211_hdr_4addr *) skb->data;
c0f72ca8 711 fc = le16_to_cpu(hdr->frame_ctl);
4339d328
JM		 712 if (WLAN_FC_GET_TYPE(fc) != IEEE80211_FTYPE_MGMT ||
713 (WLAN_FC_GET_STYPE(fc) != IEEE80211_STYPE_ASSOC_RESP &&
714 WLAN_FC_GET_STYPE(fc) != IEEE80211_STYPE_REASSOC_RESP) ||
ff1d2767
JM		 715 skb->len < IEEE80211_MGMT_HDR_LEN + 4) {
716 printk(KERN_DEBUG "%s: hostap_ap_tx_cb_assoc received invalid "
717 "frame\n", dev->name);
718 dev_kfree_skb(skb);
719 return;
720 }
721
722 if (!ok) {
723 txt = "frame was not ACKed";
724 goto done;
725 }
726
727 spin_lock(&ap->sta_table_lock);
728 sta = ap_get_sta(ap, hdr->addr1);
729 if (sta)
730 atomic_inc(&sta->users);
731 spin_unlock(&ap->sta_table_lock);
732
733 if (!sta) {
734 txt = "STA not found";
735 goto done;
736 }
737
738 pos = (u16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
739 pos++;
740 status = le16_to_cpu(*pos++);
741 if (status == WLAN_STATUS_SUCCESS) {
742 if (!(sta->flags & WLAN_STA_ASSOC))
743 hostap_event_new_sta(dev, sta);
744 txt = "STA associated";
745 sta->flags |= WLAN_STA_ASSOC;
746 sta->last_assoc = jiffies;
747 } else
748 txt = "association failed";
749
750 done:
751 if (sta)
752 atomic_dec(&sta->users);
753 if (txt) {
754 PDEBUG(DEBUG_AP, "%s: " MACSTR " assoc_cb - %s\n",
755 dev->name, MAC2STR(hdr->addr1), txt);
756 }
757 dev_kfree_skb(skb);
758}
759
760/* Called only as a tasklet (software IRQ); TX callback for poll frames used
761 * in verifying whether the STA is still present. */
762static void hostap_ap_tx_cb_poll(struct sk_buff *skb, int ok, void *data)
763{
764 struct ap_data *ap = data;
d041674d 765 struct ieee80211_hdr_4addr *hdr;
ff1d2767
JM		 766 struct sta_info *sta;
767
768 if (skb->len < 24)
769 goto fail;
d041674d 770 hdr = (struct ieee80211_hdr_4addr *) skb->data;
ff1d2767
JM		 771 if (ok) {
772 spin_lock(&ap->sta_table_lock);
773 sta = ap_get_sta(ap, hdr->addr1);
774 if (sta)
775 sta->flags &= ~WLAN_STA_PENDING_POLL;
776 spin_unlock(&ap->sta_table_lock);
777 } else {
778 PDEBUG(DEBUG_AP, "%s: STA " MACSTR " did not ACK activity "
779 "poll frame\n", ap->local->dev->name,
780 MAC2STR(hdr->addr1));
781 }
782
783 fail:
784 dev_kfree_skb(skb);
785}
786#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
787
788
789void hostap_init_data(local_info_t *local)
790{
791 struct ap_data *ap = local->ap;
792
793 if (ap == NULL) {
794 printk(KERN_WARNING "hostap_init_data: ap == NULL\n");
795 return;
796 }
797 memset(ap, 0, sizeof(struct ap_data));
798 ap->local = local;
799
800 ap->ap_policy = GET_INT_PARM(other_ap_policy, local->card_idx);
801 ap->bridge_packets = GET_INT_PARM(ap_bridge_packets, local->card_idx);
802 ap->max_inactivity =
803 GET_INT_PARM(ap_max_inactivity, local->card_idx) * HZ;
804 ap->autom_ap_wds = GET_INT_PARM(autom_ap_wds, local->card_idx);
805
806 spin_lock_init(&ap->sta_table_lock);
807 INIT_LIST_HEAD(&ap->sta_list);
808
809 /* Initialize task queue structure for AP management */
c4028958 810 INIT_WORK(&local->ap->add_sta_proc_queue, handle_add_proc_queue);
ff1d2767
JM		 811
812 ap->tx_callback_idx =
813 hostap_tx_callback_register(local, hostap_ap_tx_cb, ap);
814 if (ap->tx_callback_idx == 0)
815 printk(KERN_WARNING "%s: failed to register TX callback for "
816 "AP\n", local->dev->name);
817#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
c4028958 818 INIT_WORK(&local->ap->wds_oper_queue, handle_wds_oper_queue);
ff1d2767
JM		 819
820 ap->tx_callback_auth =
821 hostap_tx_callback_register(local, hostap_ap_tx_cb_auth, ap);
822 ap->tx_callback_assoc =
823 hostap_tx_callback_register(local, hostap_ap_tx_cb_assoc, ap);
824 ap->tx_callback_poll =
825 hostap_tx_callback_register(local, hostap_ap_tx_cb_poll, ap);
826 if (ap->tx_callback_auth == 0 || ap->tx_callback_assoc == 0 ||
827 ap->tx_callback_poll == 0)
828 printk(KERN_WARNING "%s: failed to register TX callback for "
829 "AP\n", local->dev->name);
830
831 spin_lock_init(&ap->mac_restrictions.lock);
832 INIT_LIST_HEAD(&ap->mac_restrictions.mac_list);
833#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
834
835 ap->initialized = 1;
836}
837
838
839void hostap_init_ap_proc(local_info_t *local)
840{
841 struct ap_data *ap = local->ap;
842
843 ap->proc = local->proc;
844 if (ap->proc == NULL)
845 return;
846
847#ifndef PRISM2_NO_PROCFS_DEBUG
848 create_proc_read_entry("ap_debug", 0, ap->proc,
849 ap_debug_proc_read, ap);
850#endif /* PRISM2_NO_PROCFS_DEBUG */
851
852#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
853 create_proc_read_entry("ap_control", 0, ap->proc,
854 ap_control_proc_read, ap);
855 create_proc_read_entry("ap", 0, ap->proc,
856 prism2_ap_proc_read, ap);
857#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
858
859}
860
861
862void hostap_free_data(struct ap_data *ap)
863{
864 struct list_head *n, *ptr;
865
866 if (ap == NULL || !ap->initialized) {
867 printk(KERN_DEBUG "hostap_free_data: ap has not yet been "
868 "initialized - skip resource freeing\n");
869 return;
870 }
871
872#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
873 if (ap->crypt)
874 ap->crypt->deinit(ap->crypt_priv);
875 ap->crypt = ap->crypt_priv = NULL;
876#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
877
878 list_for_each_safe(ptr, n, &ap->sta_list) {
879 struct sta_info *sta = list_entry(ptr, struct sta_info, list);
880 ap_sta_hash_del(ap, sta);
881 list_del(&sta->list);
882 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
883 hostap_event_expired_sta(sta->local->dev, sta);
884 ap_free_sta(ap, sta);
885 }
886
887#ifndef PRISM2_NO_PROCFS_DEBUG
888 if (ap->proc != NULL) {
889 remove_proc_entry("ap_debug", ap->proc);
890 }
891#endif /* PRISM2_NO_PROCFS_DEBUG */
892
893#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
894 if (ap->proc != NULL) {
895 remove_proc_entry("ap", ap->proc);
896 remove_proc_entry("ap_control", ap->proc);
897 }
898 ap_control_flush_macs(&ap->mac_restrictions);
899#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
900
901 ap->initialized = 0;
902}
903
904
905/* caller should have mutex for AP STA list handling */
906static struct sta_info* ap_get_sta(struct ap_data *ap, u8 *sta)
907{
908 struct sta_info *s;
909
910 s = ap->sta_hash[STA_HASH(sta)];
911 while (s != NULL && memcmp(s->addr, sta, ETH_ALEN) != 0)
912 s = s->hnext;
913 return s;
914}
915
916
917#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
918
919/* Called from timer handler and from scheduled AP queue handlers */
920static void prism2_send_mgmt(struct net_device *dev,
4339d328 921 u16 type_subtype, char *body,
ff1d2767
JM		 922 int body_len, u8 *addr, u16 tx_cb_idx)
923{
924 struct hostap_interface *iface;
925 local_info_t *local;
d041674d 926 struct ieee80211_hdr_4addr *hdr;
ff1d2767
JM		 927 u16 fc;
928 struct sk_buff *skb;
929 struct hostap_skb_tx_data *meta;
930 int hdrlen;
931
932 iface = netdev_priv(dev);
933 local = iface->local;
934 dev = local->dev; /* always use master radio device */
935 iface = netdev_priv(dev);
936
937 if (!(dev->flags & IFF_UP)) {
938 PDEBUG(DEBUG_AP, "%s: prism2_send_mgmt - device is not UP - "
939 "cannot send frame\n", dev->name);
940 return;
941 }
942
943 skb = dev_alloc_skb(sizeof(*hdr) + body_len);
944 if (skb == NULL) {
945 PDEBUG(DEBUG_AP, "%s: prism2_send_mgmt failed to allocate "
946 "skb\n", dev->name);
947 return;
948 }
949
4339d328 950 fc = type_subtype;
ff1d2767 951 hdrlen = hostap_80211_get_hdrlen(fc);
d041674d 952 hdr = (struct ieee80211_hdr_4addr *) skb_put(skb, hdrlen);
ff1d2767
JM		 953 if (body)
954 memcpy(skb_put(skb, body_len), body, body_len);
955
956 memset(hdr, 0, hdrlen);
957
958 /* FIX: ctrl::ack sending used special HFA384X_TX_CTRL_802_11
959 * tx_control instead of using local->tx_control */
960
961
962 memcpy(hdr->addr1, addr, ETH_ALEN); /* DA / RA */
4339d328 963 if (WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_DATA) {
b2f4a2e3 964 fc |= IEEE80211_FCTL_FROMDS;
ff1d2767
JM		 965 memcpy(hdr->addr2, dev->dev_addr, ETH_ALEN); /* BSSID */
966 memcpy(hdr->addr3, dev->dev_addr, ETH_ALEN); /* SA */
4339d328 967 } else if (WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_CTL) {
ff1d2767
JM		 968 /* control:ACK does not have addr2 or addr3 */
969 memset(hdr->addr2, 0, ETH_ALEN);
970 memset(hdr->addr3, 0, ETH_ALEN);
971 } else {
972 memcpy(hdr->addr2, dev->dev_addr, ETH_ALEN); /* SA */
973 memcpy(hdr->addr3, dev->dev_addr, ETH_ALEN); /* BSSID */
974 }
975
c0f72ca8 976 hdr->frame_ctl = cpu_to_le16(fc);
ff1d2767
JM		 977
978 meta = (struct hostap_skb_tx_data *) skb->cb;
979 memset(meta, 0, sizeof(*meta));
980 meta->magic = HOSTAP_SKB_TX_DATA_MAGIC;
981 meta->iface = iface;
982 meta->tx_cb_idx = tx_cb_idx;
983
984 skb->dev = dev;
985 skb->mac.raw = skb->nh.raw = skb->data;
986 dev_queue_xmit(skb);
987}
988#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
989
990
991static int prism2_sta_proc_read(char *page, char **start, off_t off,
992 int count, int *eof, void *data)
993{
994 char *p = page;
995 struct sta_info *sta = (struct sta_info *) data;
996 int i;
997
998 /* FIX: possible race condition.. the STA data could have just expired,
999 * but proc entry was still here so that the read could have started;
1000 * some locking should be done here.. */
1001
1002 if (off != 0) {
1003 *eof = 1;
1004 return 0;
1005 }
1006
1007 p += sprintf(p, "%s=" MACSTR "\nusers=%d\naid=%d\n"
1008 "flags=0x%04x%s%s%s%s%s%s%s\n"
1009 "capability=0x%02x\nlisten_interval=%d\nsupported_rates=",
1010 sta->ap ? "AP" : "STA",
1011 MAC2STR(sta->addr), atomic_read(&sta->users), sta->aid,
1012 sta->flags,
1013 sta->flags & WLAN_STA_AUTH ? " AUTH" : "",
1014 sta->flags & WLAN_STA_ASSOC ? " ASSOC" : "",
1015 sta->flags & WLAN_STA_PS ? " PS" : "",
1016 sta->flags & WLAN_STA_TIM ? " TIM" : "",
1017 sta->flags & WLAN_STA_PERM ? " PERM" : "",
1018 sta->flags & WLAN_STA_AUTHORIZED ? " AUTHORIZED" : "",
1019 sta->flags & WLAN_STA_PENDING_POLL ? " POLL" : "",
1020 sta->capability, sta->listen_interval);
1021 /* supported_rates: 500 kbit/s units with msb ignored */
1022 for (i = 0; i < sizeof(sta->supported_rates); i++)
1023 if (sta->supported_rates[i] != 0)
1024 p += sprintf(p, "%d%sMbps ",
1025 (sta->supported_rates[i] & 0x7f) / 2,
1026 sta->supported_rates[i] & 1 ? ".5" : "");
1027 p += sprintf(p, "\njiffies=%lu\nlast_auth=%lu\nlast_assoc=%lu\n"
1028 "last_rx=%lu\nlast_tx=%lu\nrx_packets=%lu\n"
1029 "tx_packets=%lu\n"
1030 "rx_bytes=%lu\ntx_bytes=%lu\nbuffer_count=%d\n"
1031 "last_rx: silence=%d dBm signal=%d dBm rate=%d%s Mbps\n"
1032 "tx_rate=%d\ntx[1M]=%d\ntx[2M]=%d\ntx[5.5M]=%d\n"
1033 "tx[11M]=%d\n"
1034 "rx[1M]=%d\nrx[2M]=%d\nrx[5.5M]=%d\nrx[11M]=%d\n",
1035 jiffies, sta->last_auth, sta->last_assoc, sta->last_rx,
1036 sta->last_tx,
1037 sta->rx_packets, sta->tx_packets, sta->rx_bytes,
1038 sta->tx_bytes, skb_queue_len(&sta->tx_buf),
1039 sta->last_rx_silence,
1040 sta->last_rx_signal, sta->last_rx_rate / 10,
1041 sta->last_rx_rate % 10 ? ".5" : "",
1042 sta->tx_rate, sta->tx_count[0], sta->tx_count[1],
1043 sta->tx_count[2], sta->tx_count[3], sta->rx_count[0],
1044 sta->rx_count[1], sta->rx_count[2], sta->rx_count[3]);
1045 if (sta->crypt && sta->crypt->ops && sta->crypt->ops->print_stats)
1046 p = sta->crypt->ops->print_stats(p, sta->crypt->priv);
1047#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1048 if (sta->ap) {
1049 if (sta->u.ap.channel >= 0)
1050 p += sprintf(p, "channel=%d\n", sta->u.ap.channel);
1051 p += sprintf(p, "ssid=");
1052 for (i = 0; i < sta->u.ap.ssid_len; i++)
1053 p += sprintf(p, ((sta->u.ap.ssid[i] >= 32 &&
1054 sta->u.ap.ssid[i] < 127) ?
1055 "%c" : "<%02x>"),
1056 sta->u.ap.ssid[i]);
1057 p += sprintf(p, "\n");
1058 }
1059#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1060
1061 return (p - page);
1062}
1063
1064
c4028958 1065static void handle_add_proc_queue(struct work_struct *work)
ff1d2767 1066{
c4028958
DH		 1067 struct ap_data *ap = container_of(work, struct ap_data,
1068 add_sta_proc_queue);
ff1d2767
JM		 1069 struct sta_info *sta;
1070 char name[20];
1071 struct add_sta_proc_data *entry, *prev;
1072
1073 entry = ap->add_sta_proc_entries;
1074 ap->add_sta_proc_entries = NULL;
1075
1076 while (entry) {
1077 spin_lock_bh(&ap->sta_table_lock);
1078 sta = ap_get_sta(ap, entry->addr);
1079 if (sta)
1080 atomic_inc(&sta->users);
1081 spin_unlock_bh(&ap->sta_table_lock);
1082
1083 if (sta) {
1084 sprintf(name, MACSTR, MAC2STR(sta->addr));
1085 sta->proc = create_proc_read_entry(
1086 name, 0, ap->proc,
1087 prism2_sta_proc_read, sta);
1088
1089 atomic_dec(&sta->users);
1090 }
1091
1092 prev = entry;
1093 entry = entry->next;
1094 kfree(prev);
1095 }
1096}
1097
1098
1099static struct sta_info * ap_add_sta(struct ap_data *ap, u8 *addr)
1100{
1101 struct sta_info *sta;
1102
1103 sta = (struct sta_info *)
1104 kmalloc(sizeof(struct sta_info), GFP_ATOMIC);
1105 if (sta == NULL) {
1106 PDEBUG(DEBUG_AP, "AP: kmalloc failed\n");
1107 return NULL;
1108 }
1109
1110 /* initialize STA info data */
1111 memset(sta, 0, sizeof(struct sta_info));
1112 sta->local = ap->local;
1113 skb_queue_head_init(&sta->tx_buf);
1114 memcpy(sta->addr, addr, ETH_ALEN);
1115
1116 atomic_inc(&sta->users);
1117 spin_lock_bh(&ap->sta_table_lock);
1118 list_add(&sta->list, &ap->sta_list);
1119 ap->num_sta++;
1120 ap_sta_hash_add(ap, sta);
1121 spin_unlock_bh(&ap->sta_table_lock);
1122
1123 if (ap->proc) {
1124 struct add_sta_proc_data *entry;
1125 /* schedule a non-interrupt context process to add a procfs
1126 * entry for the STA since procfs code use GFP_KERNEL */
1127 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
1128 if (entry) {
1129 memcpy(entry->addr, sta->addr, ETH_ALEN);
1130 entry->next = ap->add_sta_proc_entries;
1131 ap->add_sta_proc_entries = entry;
1132 schedule_work(&ap->add_sta_proc_queue);
1133 } else
1134 printk(KERN_DEBUG "Failed to add STA proc data\n");
1135 }
1136
1137#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1138 init_timer(&sta->timer);
1139 sta->timer.expires = jiffies + ap->max_inactivity;
1140 sta->timer.data = (unsigned long) sta;
1141 sta->timer.function = ap_handle_timer;
1142 if (!ap->local->hostapd)
1143 add_timer(&sta->timer);
1144#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1145
1146 return sta;
1147}
1148
1149
1150static int ap_tx_rate_ok(int rateidx, struct sta_info *sta,
1151 local_info_t *local)
1152{
1153 if (rateidx > sta->tx_max_rate ||
1154 !(sta->tx_supp_rates & (1 << rateidx)))
1155 return 0;
1156
1157 if (local->tx_rate_control != 0 &&
1158 !(local->tx_rate_control & (1 << rateidx)))
1159 return 0;
1160
1161 return 1;
1162}
1163
1164
1165static void prism2_check_tx_rates(struct sta_info *sta)
1166{
1167 int i;
1168
1169 sta->tx_supp_rates = 0;
1170 for (i = 0; i < sizeof(sta->supported_rates); i++) {
1171 if ((sta->supported_rates[i] & 0x7f) == 2)
1172 sta->tx_supp_rates |= WLAN_RATE_1M;
1173 if ((sta->supported_rates[i] & 0x7f) == 4)
1174 sta->tx_supp_rates |= WLAN_RATE_2M;
1175 if ((sta->supported_rates[i] & 0x7f) == 11)
1176 sta->tx_supp_rates |= WLAN_RATE_5M5;
1177 if ((sta->supported_rates[i] & 0x7f) == 22)
1178 sta->tx_supp_rates |= WLAN_RATE_11M;
1179 }
1180 sta->tx_max_rate = sta->tx_rate = sta->tx_rate_idx = 0;
1181 if (sta->tx_supp_rates & WLAN_RATE_1M) {
1182 sta->tx_max_rate = 0;
1183 if (ap_tx_rate_ok(0, sta, sta->local)) {
1184 sta->tx_rate = 10;
1185 sta->tx_rate_idx = 0;
1186 }
1187 }
1188 if (sta->tx_supp_rates & WLAN_RATE_2M) {
1189 sta->tx_max_rate = 1;
1190 if (ap_tx_rate_ok(1, sta, sta->local)) {
1191 sta->tx_rate = 20;
1192 sta->tx_rate_idx = 1;
1193 }
1194 }
1195 if (sta->tx_supp_rates & WLAN_RATE_5M5) {
1196 sta->tx_max_rate = 2;
1197 if (ap_tx_rate_ok(2, sta, sta->local)) {
1198 sta->tx_rate = 55;
1199 sta->tx_rate_idx = 2;
1200 }
1201 }
1202 if (sta->tx_supp_rates & WLAN_RATE_11M) {
1203 sta->tx_max_rate = 3;
1204 if (ap_tx_rate_ok(3, sta, sta->local)) {
1205 sta->tx_rate = 110;
1206 sta->tx_rate_idx = 3;
1207 }
1208 }
1209}
1210
1211
1212#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1213
1214static void ap_crypt_init(struct ap_data *ap)
1215{
62fe7e37 1216 ap->crypt = ieee80211_get_crypto_ops("WEP");
ff1d2767
JM		 1217
1218 if (ap->crypt) {
1219 if (ap->crypt->init) {
1220 ap->crypt_priv = ap->crypt->init(0);
1221 if (ap->crypt_priv == NULL)
1222 ap->crypt = NULL;
1223 else {
1224 u8 key[WEP_KEY_LEN];
1225 get_random_bytes(key, WEP_KEY_LEN);
1226 ap->crypt->set_key(key, WEP_KEY_LEN, NULL,
1227 ap->crypt_priv);
1228 }
1229 }
1230 }
1231
1232 if (ap->crypt == NULL) {
1233 printk(KERN_WARNING "AP could not initialize WEP: load module "
62fe7e37 1234 "ieee80211_crypt_wep.ko\n");
ff1d2767
JM		 1235 }
1236}
1237
1238
1239/* Generate challenge data for shared key authentication. IEEE 802.11 specifies
1240 * that WEP algorithm is used for generating challange. This should be unique,
1241 * but otherwise there is not really need for randomness etc. Initialize WEP
1242 * with pseudo random key and then use increasing IV to get unique challenge
1243 * streams.
1244 *
1245 * Called only as a scheduled task for pending AP frames.
1246 */
1247static char * ap_auth_make_challenge(struct ap_data *ap)
1248{
1249 char *tmpbuf;
1250 struct sk_buff *skb;
1251
1252 if (ap->crypt == NULL) {
1253 ap_crypt_init(ap);
1254 if (ap->crypt == NULL)
1255 return NULL;
1256 }
1257
1258 tmpbuf = (char *) kmalloc(WLAN_AUTH_CHALLENGE_LEN, GFP_ATOMIC);
1259 if (tmpbuf == NULL) {
1260 PDEBUG(DEBUG_AP, "AP: kmalloc failed for challenge\n");
1261 return NULL;
1262 }
1263
1264 skb = dev_alloc_skb(WLAN_AUTH_CHALLENGE_LEN +
5bfc819b
JK		 1265 ap->crypt->extra_mpdu_prefix_len +
1266 ap->crypt->extra_mpdu_postfix_len);
ff1d2767
JM		 1267 if (skb == NULL) {
1268 kfree(tmpbuf);
1269 return NULL;
1270 }
1271
5bfc819b 1272 skb_reserve(skb, ap->crypt->extra_mpdu_prefix_len);
ff1d2767
JM		 1273 memset(skb_put(skb, WLAN_AUTH_CHALLENGE_LEN), 0,
1274 WLAN_AUTH_CHALLENGE_LEN);
1275 if (ap->crypt->encrypt_mpdu(skb, 0, ap->crypt_priv)) {
1276 dev_kfree_skb(skb);
1277 kfree(tmpbuf);
1278 return NULL;
1279 }
1280
5bfc819b 1281 memcpy(tmpbuf, skb->data + ap->crypt->extra_mpdu_prefix_len,
ff1d2767
JM		 1282 WLAN_AUTH_CHALLENGE_LEN);
1283 dev_kfree_skb(skb);
1284
1285 return tmpbuf;
1286}
1287
1288
1289/* Called only as a scheduled task for pending AP frames. */
1290static void handle_authen(local_info_t *local, struct sk_buff *skb,
1291 struct hostap_80211_rx_status *rx_stats)
1292{
1293 struct net_device *dev = local->dev;
d041674d 1294 struct ieee80211_hdr_4addr *hdr = (struct ieee80211_hdr_4addr *) skb->data;
ff1d2767
JM		 1295 size_t hdrlen;
1296 struct ap_data *ap = local->ap;
1297 char body[8 + WLAN_AUTH_CHALLENGE_LEN], *challenge = NULL;
1298 int len, olen;
1299 u16 auth_alg, auth_transaction, status_code, *pos;
1300 u16 resp = WLAN_STATUS_SUCCESS, fc;
1301 struct sta_info *sta = NULL;
62fe7e37 1302 struct ieee80211_crypt_data *crypt;
ff1d2767
JM		 1303 char *txt = "";
1304
1305 len = skb->len - IEEE80211_MGMT_HDR_LEN;
1306
c0f72ca8 1307 fc = le16_to_cpu(hdr->frame_ctl);
ff1d2767
JM		 1308 hdrlen = hostap_80211_get_hdrlen(fc);
1309
1310 if (len < 6) {
1311 PDEBUG(DEBUG_AP, "%s: handle_authen - too short payload "
1312 "(len=%d) from " MACSTR "\n", dev->name, len,
1313 MAC2STR(hdr->addr2));
1314 return;
1315 }
1316
1317 spin_lock_bh(&local->ap->sta_table_lock);
1318 sta = ap_get_sta(local->ap, hdr->addr2);
1319 if (sta)
1320 atomic_inc(&sta->users);
1321 spin_unlock_bh(&local->ap->sta_table_lock);
1322
1323 if (sta && sta->crypt)
1324 crypt = sta->crypt;
1325 else {
1326 int idx = 0;
1327 if (skb->len >= hdrlen + 3)
1328 idx = skb->data[hdrlen + 3] >> 6;
1329 crypt = local->crypt[idx];
1330 }
1331
1332 pos = (u16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
1333 auth_alg = __le16_to_cpu(*pos);
1334 pos++;
1335 auth_transaction = __le16_to_cpu(*pos);
1336 pos++;
1337 status_code = __le16_to_cpu(*pos);
1338 pos++;
1339
1340 if (memcmp(dev->dev_addr, hdr->addr2, ETH_ALEN) == 0 ||
1341 ap_control_mac_deny(&ap->mac_restrictions, hdr->addr2)) {
1342 txt = "authentication denied";
1343 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1344 goto fail;
1345 }
1346
1347 if (((local->auth_algs & PRISM2_AUTH_OPEN) &&
1348 auth_alg == WLAN_AUTH_OPEN) ||
1349 ((local->auth_algs & PRISM2_AUTH_SHARED_KEY) &&
1350 crypt && auth_alg == WLAN_AUTH_SHARED_KEY)) {
1351 } else {
1352 txt = "unsupported algorithm";
1353 resp = WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG;
1354 goto fail;
1355 }
1356
1357 if (len >= 8) {
1358 u8 *u = (u8 *) pos;
1359 if (*u == WLAN_EID_CHALLENGE) {
1360 if (*(u + 1) != WLAN_AUTH_CHALLENGE_LEN) {
1361 txt = "invalid challenge len";
1362 resp = WLAN_STATUS_CHALLENGE_FAIL;
1363 goto fail;
1364 }
1365 if (len - 8 < WLAN_AUTH_CHALLENGE_LEN) {
1366 txt = "challenge underflow";
1367 resp = WLAN_STATUS_CHALLENGE_FAIL;
1368 goto fail;
1369 }
1370 challenge = (char *) (u + 2);
1371 }
1372 }
1373
1374 if (sta && sta->ap) {
1375 if (time_after(jiffies, sta->u.ap.last_beacon +
1376 (10 * sta->listen_interval * HZ) / 1024)) {
1377 PDEBUG(DEBUG_AP, "%s: no beacons received for a while,"
1378 " assuming AP " MACSTR " is now STA\n",
1379 dev->name, MAC2STR(sta->addr));
1380 sta->ap = 0;
1381 sta->flags = 0;
1382 sta->u.sta.challenge = NULL;
1383 } else {
1384 txt = "AP trying to authenticate?";
1385 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1386 goto fail;
1387 }
1388 }
1389
1390 if ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 1) ||
1391 (auth_alg == WLAN_AUTH_SHARED_KEY &&
1392 (auth_transaction == 1 ||
1393 (auth_transaction == 3 && sta != NULL &&
1394 sta->u.sta.challenge != NULL)))) {
1395 } else {
1396 txt = "unknown authentication transaction number";
1397 resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION;
1398 goto fail;
1399 }
1400
1401 if (sta == NULL) {
1402 txt = "new STA";
1403
1404 if (local->ap->num_sta >= MAX_STA_COUNT) {
1405 /* FIX: might try to remove some old STAs first? */
1406 txt = "no more room for new STAs";
1407 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1408 goto fail;
1409 }
1410
1411 sta = ap_add_sta(local->ap, hdr->addr2);
1412 if (sta == NULL) {
1413 txt = "ap_add_sta failed";
1414 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1415 goto fail;
1416 }
1417 }
1418
1419 switch (auth_alg) {
1420 case WLAN_AUTH_OPEN:
1421 txt = "authOK";
1422 /* IEEE 802.11 standard is not completely clear about
1423 * whether STA is considered authenticated after
1424 * authentication OK frame has been send or after it
1425 * has been ACKed. In order to reduce interoperability
1426 * issues, mark the STA authenticated before ACK. */
1427 sta->flags |= WLAN_STA_AUTH;
1428 break;
1429
1430 case WLAN_AUTH_SHARED_KEY:
1431 if (auth_transaction == 1) {
1432 if (sta->u.sta.challenge == NULL) {
1433 sta->u.sta.challenge =
1434 ap_auth_make_challenge(local->ap);
1435 if (sta->u.sta.challenge == NULL) {
1436 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1437 goto fail;
1438 }
1439 }
1440 } else {
1441 if (sta->u.sta.challenge == NULL ||
1442 challenge == NULL ||
1443 memcmp(sta->u.sta.challenge, challenge,
1444 WLAN_AUTH_CHALLENGE_LEN) != 0 ||
831a179f 1445 !(fc & IEEE80211_FCTL_PROTECTED)) {
ff1d2767
JM		 1446 txt = "challenge response incorrect";
1447 resp = WLAN_STATUS_CHALLENGE_FAIL;
1448 goto fail;
1449 }
1450
1451 txt = "challenge OK - authOK";
1452 /* IEEE 802.11 standard is not completely clear about
1453 * whether STA is considered authenticated after
1454 * authentication OK frame has been send or after it
1455 * has been ACKed. In order to reduce interoperability
1456 * issues, mark the STA authenticated before ACK. */
1457 sta->flags |= WLAN_STA_AUTH;
1458 kfree(sta->u.sta.challenge);
1459 sta->u.sta.challenge = NULL;
1460 }
1461 break;
1462 }
1463
1464 fail:
1465 pos = (u16 *) body;
1466 *pos = cpu_to_le16(auth_alg);
1467 pos++;
1468 *pos = cpu_to_le16(auth_transaction + 1);
1469 pos++;
1470 *pos = cpu_to_le16(resp); /* status_code */
1471 pos++;
1472 olen = 6;
1473
1474 if (resp == WLAN_STATUS_SUCCESS && sta != NULL &&
1475 sta->u.sta.challenge != NULL &&
1476 auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 1) {
1477 u8 *tmp = (u8 *) pos;
1478 *tmp++ = WLAN_EID_CHALLENGE;
1479 *tmp++ = WLAN_AUTH_CHALLENGE_LEN;
1480 pos++;
1481 memcpy(pos, sta->u.sta.challenge, WLAN_AUTH_CHALLENGE_LEN);
1482 olen += 2 + WLAN_AUTH_CHALLENGE_LEN;
1483 }
1484
4339d328 1485 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_AUTH,
ff1d2767
JM		 1486 body, olen, hdr->addr2, ap->tx_callback_auth);
1487
1488 if (sta) {
1489 sta->last_rx = jiffies;
1490 atomic_dec(&sta->users);
1491 }
1492
1493 if (resp) {
1494 PDEBUG(DEBUG_AP, "%s: " MACSTR " auth (alg=%d trans#=%d "
1495 "stat=%d len=%d fc=%04x) ==> %d (%s)\n",
1496 dev->name, MAC2STR(hdr->addr2), auth_alg,
1497 auth_transaction, status_code, len, fc, resp, txt);
1498 }
1499}
1500
1501
1502/* Called only as a scheduled task for pending AP frames. */
1503static void handle_assoc(local_info_t *local, struct sk_buff *skb,
1504 struct hostap_80211_rx_status *rx_stats, int reassoc)
1505{
1506 struct net_device *dev = local->dev;
d041674d 1507 struct ieee80211_hdr_4addr *hdr = (struct ieee80211_hdr_4addr *) skb->data;
ff1d2767
JM		 1508 char body[12], *p, *lpos;
1509 int len, left;
1510 u16 *pos;
1511 u16 resp = WLAN_STATUS_SUCCESS;
1512 struct sta_info *sta = NULL;
1513 int send_deauth = 0;
1514 char *txt = "";
1515 u8 prev_ap[ETH_ALEN];
1516
1517 left = len = skb->len - IEEE80211_MGMT_HDR_LEN;
1518
1519 if (len < (reassoc ? 10 : 4)) {
1520 PDEBUG(DEBUG_AP, "%s: handle_assoc - too short payload "
1521 "(len=%d, reassoc=%d) from " MACSTR "\n",
1522 dev->name, len, reassoc, MAC2STR(hdr->addr2));
1523 return;
1524 }
1525
1526 spin_lock_bh(&local->ap->sta_table_lock);
1527 sta = ap_get_sta(local->ap, hdr->addr2);
1528 if (sta == NULL || (sta->flags & WLAN_STA_AUTH) == 0) {
1529 spin_unlock_bh(&local->ap->sta_table_lock);
1530 txt = "trying to associate before authentication";
1531 send_deauth = 1;
1532 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1533 sta = NULL; /* do not decrement sta->users */
1534 goto fail;
1535 }
1536 atomic_inc(&sta->users);
1537 spin_unlock_bh(&local->ap->sta_table_lock);
1538
1539 pos = (u16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
1540 sta->capability = __le16_to_cpu(*pos);
1541 pos++; left -= 2;
1542 sta->listen_interval = __le16_to_cpu(*pos);
1543 pos++; left -= 2;
1544
1545 if (reassoc) {
1546 memcpy(prev_ap, pos, ETH_ALEN);
1547 pos++; pos++; pos++; left -= 6;
1548 } else
1549 memset(prev_ap, 0, ETH_ALEN);
1550
1551 if (left >= 2) {
1552 unsigned int ileft;
1553 unsigned char *u = (unsigned char *) pos;
1554
1555 if (*u == WLAN_EID_SSID) {
1556 u++; left--;
1557 ileft = *u;
1558 u++; left--;
1559
1560 if (ileft > left || ileft > MAX_SSID_LEN) {
1561 txt = "SSID overflow";
1562 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1563 goto fail;
1564 }
1565
1566 if (ileft != strlen(local->essid) ||
1567 memcmp(local->essid, u, ileft) != 0) {
1568 txt = "not our SSID";
1569 resp = WLAN_STATUS_ASSOC_DENIED_UNSPEC;
1570 goto fail;
1571 }
1572
1573 u += ileft;
1574 left -= ileft;
1575 }
1576
1577 if (left >= 2 && *u == WLAN_EID_SUPP_RATES) {
1578 u++; left--;
1579 ileft = *u;
1580 u++; left--;
74fae82c 1581
ff1d2767
JM		 1582 if (ileft > left || ileft == 0 ||
1583 ileft > WLAN_SUPP_RATES_MAX) {
1584 txt = "SUPP_RATES len error";
1585 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1586 goto fail;
1587 }
1588
1589 memset(sta->supported_rates, 0,
1590 sizeof(sta->supported_rates));
1591 memcpy(sta->supported_rates, u, ileft);
1592 prism2_check_tx_rates(sta);
1593
1594 u += ileft;
1595 left -= ileft;
1596 }
1597
1598 if (left > 0) {
1599 PDEBUG(DEBUG_AP, "%s: assoc from " MACSTR " with extra"
1600 " data (%d bytes) [",
1601 dev->name, MAC2STR(hdr->addr2), left);
1602 while (left > 0) {
1603 PDEBUG2(DEBUG_AP, "<%02x>", *u);
1604 u++; left--;
1605 }
1606 PDEBUG2(DEBUG_AP, "]\n");
1607 }
1608 } else {
1609 txt = "frame underflow";
1610 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1611 goto fail;
1612 }
1613
1614 /* get a unique AID */
1615 if (sta->aid > 0)
1616 txt = "OK, old AID";
1617 else {
1618 spin_lock_bh(&local->ap->sta_table_lock);
1619 for (sta->aid = 1; sta->aid <= MAX_AID_TABLE_SIZE; sta->aid++)
1620 if (local->ap->sta_aid[sta->aid - 1] == NULL)
1621 break;
1622 if (sta->aid > MAX_AID_TABLE_SIZE) {
1623 sta->aid = 0;
1624 spin_unlock_bh(&local->ap->sta_table_lock);
1625 resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
1626 txt = "no room for more AIDs";
1627 } else {
1628 local->ap->sta_aid[sta->aid - 1] = sta;
1629 spin_unlock_bh(&local->ap->sta_table_lock);
1630 txt = "OK, new AID";
1631 }
1632 }
1633
1634 fail:
1635 pos = (u16 *) body;
1636
1637 if (send_deauth) {
1638 *pos = __constant_cpu_to_le16(
1639 WLAN_REASON_STA_REQ_ASSOC_WITHOUT_AUTH);
1640 pos++;
1641 } else {
1642 /* FIX: CF-Pollable and CF-PollReq should be set to match the
1643 * values in beacons/probe responses */
1644 /* FIX: how about privacy and WEP? */
1645 /* capability */
1646 *pos = __constant_cpu_to_le16(WLAN_CAPABILITY_ESS);
1647 pos++;
1648
1649 /* status_code */
1650 *pos = __cpu_to_le16(resp);
1651 pos++;
1652
1653 *pos = __cpu_to_le16((sta && sta->aid > 0 ? sta->aid : 0) |
1654 BIT(14) | BIT(15)); /* AID */
1655 pos++;
1656
1657 /* Supported rates (Information element) */
1658 p = (char *) pos;
1659 *p++ = WLAN_EID_SUPP_RATES;
1660 lpos = p;
1661 *p++ = 0; /* len */
1662 if (local->tx_rate_control & WLAN_RATE_1M) {
1663 *p++ = local->basic_rates & WLAN_RATE_1M ? 0x82 : 0x02;
1664 (*lpos)++;
1665 }
1666 if (local->tx_rate_control & WLAN_RATE_2M) {
1667 *p++ = local->basic_rates & WLAN_RATE_2M ? 0x84 : 0x04;
1668 (*lpos)++;
1669 }
1670 if (local->tx_rate_control & WLAN_RATE_5M5) {
1671 *p++ = local->basic_rates & WLAN_RATE_5M5 ?
1672 0x8b : 0x0b;
1673 (*lpos)++;
1674 }
1675 if (local->tx_rate_control & WLAN_RATE_11M) {
1676 *p++ = local->basic_rates & WLAN_RATE_11M ?
1677 0x96 : 0x16;
1678 (*lpos)++;
1679 }
1680 pos = (u16 *) p;
1681 }
1682
4339d328
JM		 1683 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT |
1684 (send_deauth ? IEEE80211_STYPE_DEAUTH :
1685 (reassoc ? IEEE80211_STYPE_REASSOC_RESP :
1686 IEEE80211_STYPE_ASSOC_RESP)),
ff1d2767
JM		 1687 body, (u8 *) pos - (u8 *) body,
1688 hdr->addr2,
1689 send_deauth ? 0 : local->ap->tx_callback_assoc);
1690
1691 if (sta) {
1692 if (resp == WLAN_STATUS_SUCCESS) {
1693 sta->last_rx = jiffies;
1694 /* STA will be marked associated from TX callback, if
1695 * AssocResp is ACKed */
1696 }
1697 atomic_dec(&sta->users);
1698 }
1699
1700#if 0
1701 PDEBUG(DEBUG_AP, "%s: " MACSTR " %sassoc (len=%d prev_ap=" MACSTR
1702 ") => %d(%d) (%s)\n",
1703 dev->name, MAC2STR(hdr->addr2), reassoc ? "re" : "", len,
1704 MAC2STR(prev_ap), resp, send_deauth, txt);
1705#endif
1706}
1707
1708
1709/* Called only as a scheduled task for pending AP frames. */
1710static void handle_deauth(local_info_t *local, struct sk_buff *skb,
1711 struct hostap_80211_rx_status *rx_stats)
1712{
1713 struct net_device *dev = local->dev;
d041674d 1714 struct ieee80211_hdr_4addr *hdr = (struct ieee80211_hdr_4addr *) skb->data;
ff1d2767
JM		 1715 char *body = (char *) (skb->data + IEEE80211_MGMT_HDR_LEN);
1716 int len;
1717 u16 reason_code, *pos;
1718 struct sta_info *sta = NULL;
1719
1720 len = skb->len - IEEE80211_MGMT_HDR_LEN;
1721
1722 if (len < 2) {
1723 printk("handle_deauth - too short payload (len=%d)\n", len);
1724 return;
1725 }
1726
1727 pos = (u16 *) body;
1728 reason_code = __le16_to_cpu(*pos);
1729
1730 PDEBUG(DEBUG_AP, "%s: deauthentication: " MACSTR " len=%d, "
1731 "reason_code=%d\n", dev->name, MAC2STR(hdr->addr2), len,
1732 reason_code);
1733
1734 spin_lock_bh(&local->ap->sta_table_lock);
1735 sta = ap_get_sta(local->ap, hdr->addr2);
1736 if (sta != NULL) {
1737 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap)
1738 hostap_event_expired_sta(local->dev, sta);
1739 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
1740 }
1741 spin_unlock_bh(&local->ap->sta_table_lock);
1742 if (sta == NULL) {
1743 printk("%s: deauthentication from " MACSTR ", "
1744 "reason_code=%d, but STA not authenticated\n", dev->name,
1745 MAC2STR(hdr->addr2), reason_code);
1746 }
1747}
1748
1749
1750/* Called only as a scheduled task for pending AP frames. */
1751static void handle_disassoc(local_info_t *local, struct sk_buff *skb,
1752 struct hostap_80211_rx_status *rx_stats)
1753{
1754 struct net_device *dev = local->dev;
d041674d 1755 struct ieee80211_hdr_4addr *hdr = (struct ieee80211_hdr_4addr *) skb->data;
ff1d2767
JM		 1756 char *body = skb->data + IEEE80211_MGMT_HDR_LEN;
1757 int len;
1758 u16 reason_code, *pos;
1759 struct sta_info *sta = NULL;
1760
1761 len = skb->len - IEEE80211_MGMT_HDR_LEN;
1762
1763 if (len < 2) {
1764 printk("handle_disassoc - too short payload (len=%d)\n", len);
1765 return;
1766 }
1767
1768 pos = (u16 *) body;
1769 reason_code = __le16_to_cpu(*pos);
1770
1771 PDEBUG(DEBUG_AP, "%s: disassociation: " MACSTR " len=%d, "
1772 "reason_code=%d\n", dev->name, MAC2STR(hdr->addr2), len,
1773 reason_code);
1774
1775 spin_lock_bh(&local->ap->sta_table_lock);
1776 sta = ap_get_sta(local->ap, hdr->addr2);
1777 if (sta != NULL) {
1778 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap)
1779 hostap_event_expired_sta(local->dev, sta);
1780 sta->flags &= ~WLAN_STA_ASSOC;
1781 }
1782 spin_unlock_bh(&local->ap->sta_table_lock);
1783 if (sta == NULL) {
1784 printk("%s: disassociation from " MACSTR ", "
1785 "reason_code=%d, but STA not authenticated\n",
1786 dev->name, MAC2STR(hdr->addr2), reason_code);
1787 }
1788}
1789
1790
1791/* Called only as a scheduled task for pending AP frames. */
1792static void ap_handle_data_nullfunc(local_info_t *local,
d041674d 1793 struct ieee80211_hdr_4addr *hdr)
ff1d2767
JM		 1794{
1795 struct net_device *dev = local->dev;
1796
1797 /* some STA f/w's seem to require control::ACK frame for
1798 * data::nullfunc, but at least Prism2 station f/w version 0.8.0 does
1799 * not send this..
1800 * send control::ACK for the data::nullfunc */
1801
1802 printk(KERN_DEBUG "Sending control::ACK for data::nullfunc\n");
4339d328 1803 prism2_send_mgmt(dev, IEEE80211_FTYPE_CTL | IEEE80211_STYPE_ACK,
ff1d2767
JM		 1804 NULL, 0, hdr->addr2, 0);
1805}
1806
1807
1808/* Called only as a scheduled task for pending AP frames. */
1809static void ap_handle_dropped_data(local_info_t *local,
d041674d 1810 struct ieee80211_hdr_4addr *hdr)
ff1d2767
JM		 1811{
1812 struct net_device *dev = local->dev;
1813 struct sta_info *sta;
1814 u16 reason;
1815
1816 spin_lock_bh(&local->ap->sta_table_lock);
1817 sta = ap_get_sta(local->ap, hdr->addr2);
1818 if (sta)
1819 atomic_inc(&sta->users);
1820 spin_unlock_bh(&local->ap->sta_table_lock);
1821
1822 if (sta != NULL && (sta->flags & WLAN_STA_ASSOC)) {
1823 PDEBUG(DEBUG_AP, "ap_handle_dropped_data: STA is now okay?\n");
1824 atomic_dec(&sta->users);
1825 return;
1826 }
1827
1828 reason = __constant_cpu_to_le16(
1829 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
4339d328 1830 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT |
ff1d2767 1831 ((sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) ?
4339d328 1832 IEEE80211_STYPE_DEAUTH : IEEE80211_STYPE_DISASSOC),
ff1d2767
JM		 1833 (char *) &reason, sizeof(reason), hdr->addr2, 0);
1834
1835 if (sta)
1836 atomic_dec(&sta->users);
1837}
1838
1839#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1840
1841
1842/* Called only as a scheduled task for pending AP frames. */
1843static void pspoll_send_buffered(local_info_t *local, struct sta_info *sta,
1844 struct sk_buff *skb)
1845{
5bee720f
JM		 1846 struct hostap_skb_tx_data *meta;
1847
ff1d2767
JM		 1848 if (!(sta->flags & WLAN_STA_PS)) {
1849 /* Station has moved to non-PS mode, so send all buffered
1850 * frames using normal device queue. */
1851 dev_queue_xmit(skb);
1852 return;
1853 }
1854
1855 /* add a flag for hostap_handle_sta_tx() to know that this skb should
1856 * be passed through even though STA is using PS */
5bee720f
JM		 1857 meta = (struct hostap_skb_tx_data *) skb->cb;
1858 meta->flags |= HOSTAP_TX_FLAGS_BUFFERED_FRAME;
ff1d2767
JM		 1859 if (!skb_queue_empty(&sta->tx_buf)) {
1860 /* indicate to STA that more frames follow */
5bee720f 1861 meta->flags |= HOSTAP_TX_FLAGS_ADD_MOREDATA;
ff1d2767
JM		 1862 }
1863 dev_queue_xmit(skb);
1864}
1865
1866
1867/* Called only as a scheduled task for pending AP frames. */
1868static void handle_pspoll(local_info_t *local,
d041674d 1869 struct ieee80211_hdr_4addr *hdr,
ff1d2767
JM		 1870 struct hostap_80211_rx_status *rx_stats)
1871{
1872 struct net_device *dev = local->dev;
1873 struct sta_info *sta;
1874 u16 aid;
1875 struct sk_buff *skb;
1876
1877 PDEBUG(DEBUG_PS2, "handle_pspoll: BSSID=" MACSTR ", TA=" MACSTR
1878 " PWRMGT=%d\n",
1879 MAC2STR(hdr->addr1), MAC2STR(hdr->addr2),
b2f4a2e3 1880 !!(le16_to_cpu(hdr->frame_ctl) & IEEE80211_FCTL_PM));
ff1d2767
JM		 1881
1882 if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN)) {
1883 PDEBUG(DEBUG_AP, "handle_pspoll - addr1(BSSID)=" MACSTR
1884 " not own MAC\n", MAC2STR(hdr->addr1));
1885 return;
1886 }
1887
1888 aid = __le16_to_cpu(hdr->duration_id);
1889 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) {
1890 PDEBUG(DEBUG_PS, " PSPOLL and AID[15:14] not set\n");
1891 return;
1892 }
1893 aid &= ~BIT(15) & ~BIT(14);
1894 if (aid == 0 || aid > MAX_AID_TABLE_SIZE) {
1895 PDEBUG(DEBUG_PS, " invalid aid=%d\n", aid);
1896 return;
1897 }
1898 PDEBUG(DEBUG_PS2, " aid=%d\n", aid);
1899
1900 spin_lock_bh(&local->ap->sta_table_lock);
1901 sta = ap_get_sta(local->ap, hdr->addr2);
1902 if (sta)
1903 atomic_inc(&sta->users);
1904 spin_unlock_bh(&local->ap->sta_table_lock);
1905
1906 if (sta == NULL) {
1907 PDEBUG(DEBUG_PS, " STA not found\n");
1908 return;
1909 }
1910 if (sta->aid != aid) {
1911 PDEBUG(DEBUG_PS, " received aid=%i does not match with "
1912 "assoc.aid=%d\n", aid, sta->aid);
1913 return;
1914 }
1915
1916 /* FIX: todo:
1917 * - add timeout for buffering (clear aid in TIM vector if buffer timed
1918 * out (expiry time must be longer than ListenInterval for
1919 * the corresponding STA; "8802-11: 11.2.1.9 AP aging function"
1920 * - what to do, if buffered, pspolled, and sent frame is not ACKed by
1921 * sta; store buffer for later use and leave TIM aid bit set? use
1922 * TX event to check whether frame was ACKed?
1923 */
1924
1925 while ((skb = skb_dequeue(&sta->tx_buf)) != NULL) {
1926 /* send buffered frame .. */
1927 PDEBUG(DEBUG_PS2, "Sending buffered frame to STA after PS POLL"
1928 " (buffer_count=%d)\n", skb_queue_len(&sta->tx_buf));
1929
1930 pspoll_send_buffered(local, sta, skb);
1931
1932 if (sta->flags & WLAN_STA_PS) {
1933 /* send only one buffered packet per PS Poll */
1934 /* FIX: should ignore further PS Polls until the
1935 * buffered packet that was just sent is acknowledged
1936 * (Tx or TxExc event) */
1937 break;
1938 }
1939 }
1940
1941 if (skb_queue_empty(&sta->tx_buf)) {
1942 /* try to clear aid from TIM */
1943 if (!(sta->flags & WLAN_STA_TIM))
1944 PDEBUG(DEBUG_PS2, "Re-unsetting TIM for aid %d\n",
1945 aid);
1946 hostap_set_tim(local, aid, 0);
1947 sta->flags &= ~WLAN_STA_TIM;
1948 }
1949
1950 atomic_dec(&sta->users);
1951}
1952
1953
1954#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1955
c4028958 1956static void handle_wds_oper_queue(struct work_struct *work)
ff1d2767 1957{
c4028958
DH		 1958 struct ap_data *ap = container_of(work, struct ap_data,
1959 wds_oper_queue);
1960 local_info_t *local = ap->local;
ff1d2767
JM		 1961 struct wds_oper_data *entry, *prev;
1962
1963 spin_lock_bh(&local->lock);
1964 entry = local->ap->wds_oper_entries;
1965 local->ap->wds_oper_entries = NULL;
1966 spin_unlock_bh(&local->lock);
1967
1968 while (entry) {
1969 PDEBUG(DEBUG_AP, "%s: %s automatic WDS connection "
1970 "to AP " MACSTR "\n",
1971 local->dev->name,
1972 entry->type == WDS_ADD ? "adding" : "removing",
1973 MAC2STR(entry->addr));
1974 if (entry->type == WDS_ADD)
1975 prism2_wds_add(local, entry->addr, 0);
1976 else if (entry->type == WDS_DEL)
1977 prism2_wds_del(local, entry->addr, 0, 1);
1978
1979 prev = entry;
1980 entry = entry->next;
1981 kfree(prev);
1982 }
1983}
1984
1985
1986/* Called only as a scheduled task for pending AP frames. */
1987static void handle_beacon(local_info_t *local, struct sk_buff *skb,
1988 struct hostap_80211_rx_status *rx_stats)
1989{
d041674d 1990 struct ieee80211_hdr_4addr *hdr = (struct ieee80211_hdr_4addr *) skb->data;
ff1d2767
JM		 1991 char *body = skb->data + IEEE80211_MGMT_HDR_LEN;
1992 int len, left;
1993 u16 *pos, beacon_int, capability;
1994 char *ssid = NULL;
1995 unsigned char *supp_rates = NULL;
1996 int ssid_len = 0, supp_rates_len = 0;
1997 struct sta_info *sta = NULL;
1998 int new_sta = 0, channel = -1;
1999
2000 len = skb->len - IEEE80211_MGMT_HDR_LEN;
2001
2002 if (len < 8 + 2 + 2) {
2003 printk(KERN_DEBUG "handle_beacon - too short payload "
2004 "(len=%d)\n", len);
2005 return;
2006 }
2007
2008 pos = (u16 *) body;
2009 left = len;
2010
2011 /* Timestamp (8 octets) */
2012 pos += 4; left -= 8;
2013 /* Beacon interval (2 octets) */
2014 beacon_int = __le16_to_cpu(*pos);
2015 pos++; left -= 2;
2016 /* Capability information (2 octets) */
2017 capability = __le16_to_cpu(*pos);
2018 pos++; left -= 2;
2019
2020 if (local->ap->ap_policy != AP_OTHER_AP_EVEN_IBSS &&
2021 capability & WLAN_CAPABILITY_IBSS)
2022 return;
2023
2024 if (left >= 2) {
2025 unsigned int ileft;
2026 unsigned char *u = (unsigned char *) pos;
2027
2028 if (*u == WLAN_EID_SSID) {
2029 u++; left--;
2030 ileft = *u;
2031 u++; left--;
2032
2033 if (ileft > left || ileft > MAX_SSID_LEN) {
2034 PDEBUG(DEBUG_AP, "SSID: overflow\n");
2035 return;
2036 }
2037
2038 if (local->ap->ap_policy == AP_OTHER_AP_SAME_SSID &&
2039 (ileft != strlen(local->essid) ||
2040 memcmp(local->essid, u, ileft) != 0)) {
2041 /* not our SSID */
2042 return;
2043 }
2044
2045 ssid = u;
2046 ssid_len = ileft;
2047
2048 u += ileft;
2049 left -= ileft;
2050 }
2051
2052 if (*u == WLAN_EID_SUPP_RATES) {
2053 u++; left--;
2054 ileft = *u;
2055 u++; left--;
74fae82c 2056
ff1d2767
JM		 2057 if (ileft > left || ileft == 0 || ileft > 8) {
2058 PDEBUG(DEBUG_AP, " - SUPP_RATES len error\n");
2059 return;
2060 }
2061
2062 supp_rates = u;
2063 supp_rates_len = ileft;
2064
2065 u += ileft;
2066 left -= ileft;
2067 }
2068
2069 if (*u == WLAN_EID_DS_PARAMS) {
2070 u++; left--;
2071 ileft = *u;
2072 u++; left--;
74fae82c 2073
ff1d2767
JM		 2074 if (ileft > left || ileft != 1) {
2075 PDEBUG(DEBUG_AP, " - DS_PARAMS len error\n");
2076 return;
2077 }
2078
2079 channel = *u;
2080
2081 u += ileft;
2082 left -= ileft;
2083 }
2084 }
2085
2086 spin_lock_bh(&local->ap->sta_table_lock);
2087 sta = ap_get_sta(local->ap, hdr->addr2);
2088 if (sta != NULL)
2089 atomic_inc(&sta->users);
2090 spin_unlock_bh(&local->ap->sta_table_lock);
2091
2092 if (sta == NULL) {
2093 /* add new AP */
2094 new_sta = 1;
2095 sta = ap_add_sta(local->ap, hdr->addr2);
2096 if (sta == NULL) {
2097 printk(KERN_INFO "prism2: kmalloc failed for AP "
2098 "data structure\n");
2099 return;
2100 }
2101 hostap_event_new_sta(local->dev, sta);
2102
2103 /* mark APs authentication and associated for pseudo ad-hoc
2104 * style communication */
2105 sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
2106
2107 if (local->ap->autom_ap_wds) {
2108 hostap_wds_link_oper(local, sta->addr, WDS_ADD);
2109 }
2110 }
2111
2112 sta->ap = 1;
2113 if (ssid) {
2114 sta->u.ap.ssid_len = ssid_len;
2115 memcpy(sta->u.ap.ssid, ssid, ssid_len);
2116 sta->u.ap.ssid[ssid_len] = '\0';
2117 } else {
2118 sta->u.ap.ssid_len = 0;
2119 sta->u.ap.ssid[0] = '\0';
2120 }
2121 sta->u.ap.channel = channel;
2122 sta->rx_packets++;
2123 sta->rx_bytes += len;
2124 sta->u.ap.last_beacon = sta->last_rx = jiffies;
2125 sta->capability = capability;
2126 sta->listen_interval = beacon_int;
2127
2128 atomic_dec(&sta->users);
2129
2130 if (new_sta) {
2131 memset(sta->supported_rates, 0, sizeof(sta->supported_rates));
2132 memcpy(sta->supported_rates, supp_rates, supp_rates_len);
2133 prism2_check_tx_rates(sta);
2134 }
2135}
2136
2137#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2138
2139
2140/* Called only as a tasklet. */
2141static void handle_ap_item(local_info_t *local, struct sk_buff *skb,
2142 struct hostap_80211_rx_status *rx_stats)
2143{
2144#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2145 struct net_device *dev = local->dev;
2146#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2147 u16 fc, type, stype;
d041674d 2148 struct ieee80211_hdr_4addr *hdr;
ff1d2767
JM		 2149
2150 /* FIX: should give skb->len to handler functions and check that the
2151 * buffer is long enough */
d041674d 2152 hdr = (struct ieee80211_hdr_4addr *) skb->data;
c0f72ca8 2153 fc = le16_to_cpu(hdr->frame_ctl);
4339d328
JM		 2154 type = WLAN_FC_GET_TYPE(fc);
2155 stype = WLAN_FC_GET_STYPE(fc);
ff1d2767
JM		 2156
2157#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
4339d328 2158 if (!local->hostapd && type == IEEE80211_FTYPE_DATA) {
ff1d2767
JM		 2159 PDEBUG(DEBUG_AP, "handle_ap_item - data frame\n");
2160
b2f4a2e3
JM		 2161 if (!(fc & IEEE80211_FCTL_TODS) ||
2162 (fc & IEEE80211_FCTL_FROMDS)) {
4339d328 2163 if (stype == IEEE80211_STYPE_NULLFUNC) {
ff1d2767
JM		 2164 /* no ToDS nullfunc seems to be used to check
2165 * AP association; so send reject message to
2166 * speed up re-association */
2167 ap_handle_dropped_data(local, hdr);
2168 goto done;
2169 }
2170 PDEBUG(DEBUG_AP, " not ToDS frame (fc=0x%04x)\n",
2171 fc);
2172 goto done;
2173 }
2174
2175 if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN)) {
2176 PDEBUG(DEBUG_AP, "handle_ap_item - addr1(BSSID)="
2177 MACSTR " not own MAC\n",
2178 MAC2STR(hdr->addr1));
2179 goto done;
2180 }
2181
4339d328
JM		 2182 if (local->ap->nullfunc_ack &&
2183 stype == IEEE80211_STYPE_NULLFUNC)
ff1d2767
JM		 2184 ap_handle_data_nullfunc(local, hdr);
2185 else
2186 ap_handle_dropped_data(local, hdr);
2187 goto done;
2188 }
2189
4339d328 2190 if (type == IEEE80211_FTYPE_MGMT && stype == IEEE80211_STYPE_BEACON) {
ff1d2767
JM		 2191 handle_beacon(local, skb, rx_stats);
2192 goto done;
2193 }
2194#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2195
4339d328 2196 if (type == IEEE80211_FTYPE_CTL && stype == IEEE80211_STYPE_PSPOLL) {
ff1d2767
JM		 2197 handle_pspoll(local, hdr, rx_stats);
2198 goto done;
2199 }
2200
2201 if (local->hostapd) {
2202 PDEBUG(DEBUG_AP, "Unknown frame in AP queue: type=0x%02x "
2203 "subtype=0x%02x\n", type, stype);
2204 goto done;
2205 }
2206
2207#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
4339d328 2208 if (type != IEEE80211_FTYPE_MGMT) {
ff1d2767
JM		 2209 PDEBUG(DEBUG_AP, "handle_ap_item - not a management frame?\n");
2210 goto done;
2211 }
2212
2213 if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN)) {
2214 PDEBUG(DEBUG_AP, "handle_ap_item - addr1(DA)=" MACSTR
2215 " not own MAC\n", MAC2STR(hdr->addr1));
2216 goto done;
2217 }
2218
2219 if (memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN)) {
2220 PDEBUG(DEBUG_AP, "handle_ap_item - addr3(BSSID)=" MACSTR
2221 " not own MAC\n", MAC2STR(hdr->addr3));
2222 goto done;
2223 }
2224
2225 switch (stype) {
4339d328 2226 case IEEE80211_STYPE_ASSOC_REQ:
ff1d2767
JM		 2227 handle_assoc(local, skb, rx_stats, 0);
2228 break;
4339d328 2229 case IEEE80211_STYPE_ASSOC_RESP:
ff1d2767
JM		 2230 PDEBUG(DEBUG_AP, "==> ASSOC RESP (ignored)\n");
2231 break;
4339d328 2232 case IEEE80211_STYPE_REASSOC_REQ:
ff1d2767
JM		 2233 handle_assoc(local, skb, rx_stats, 1);
2234 break;
4339d328 2235 case IEEE80211_STYPE_REASSOC_RESP:
ff1d2767
JM		 2236 PDEBUG(DEBUG_AP, "==> REASSOC RESP (ignored)\n");
2237 break;
4339d328 2238 case IEEE80211_STYPE_ATIM:
ff1d2767
JM		 2239 PDEBUG(DEBUG_AP, "==> ATIM (ignored)\n");
2240 break;
4339d328 2241 case IEEE80211_STYPE_DISASSOC:
ff1d2767
JM		 2242 handle_disassoc(local, skb, rx_stats);
2243 break;
4339d328 2244 case IEEE80211_STYPE_AUTH:
ff1d2767
JM		 2245 handle_authen(local, skb, rx_stats);
2246 break;
4339d328 2247 case IEEE80211_STYPE_DEAUTH:
ff1d2767
JM		 2248 handle_deauth(local, skb, rx_stats);
2249 break;
2250 default:
4339d328
JM		 2251 PDEBUG(DEBUG_AP, "Unknown mgmt frame subtype 0x%02x\n",
2252 stype >> 4);
ff1d2767
JM		 2253 break;
2254 }
2255#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2256
2257 done:
2258 dev_kfree_skb(skb);
2259}
2260
2261
2262/* Called only as a tasklet (software IRQ) */
2263void hostap_rx(struct net_device *dev, struct sk_buff *skb,
2264 struct hostap_80211_rx_status *rx_stats)
2265{
2266 struct hostap_interface *iface;
2267 local_info_t *local;
2268 u16 fc;
d041674d 2269 struct ieee80211_hdr_4addr *hdr;
ff1d2767
JM		 2270
2271 iface = netdev_priv(dev);
2272 local = iface->local;
2273
2274 if (skb->len < 16)
2275 goto drop;
2276
2277 local->stats.rx_packets++;
2278
d041674d 2279 hdr = (struct ieee80211_hdr_4addr *) skb->data;
c0f72ca8 2280 fc = le16_to_cpu(hdr->frame_ctl);
ff1d2767
JM		 2281
2282 if (local->ap->ap_policy == AP_OTHER_AP_SKIP_ALL &&
4339d328
JM		 2283 WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_MGMT &&
2284 WLAN_FC_GET_STYPE(fc) == IEEE80211_STYPE_BEACON)
ff1d2767
JM		 2285 goto drop;
2286
2287 skb->protocol = __constant_htons(ETH_P_HOSTAP);
2288 handle_ap_item(local, skb, rx_stats);
2289 return;
2290
2291 drop:
2292 dev_kfree_skb(skb);
2293}
2294
2295
2296/* Called only as a tasklet (software IRQ) */
2297static void schedule_packet_send(local_info_t *local, struct sta_info *sta)
2298{
2299 struct sk_buff *skb;
d041674d 2300 struct ieee80211_hdr_4addr *hdr;
ff1d2767
JM		 2301 struct hostap_80211_rx_status rx_stats;
2302
2303 if (skb_queue_empty(&sta->tx_buf))
2304 return;
2305
2306 skb = dev_alloc_skb(16);
2307 if (skb == NULL) {
2308 printk(KERN_DEBUG "%s: schedule_packet_send: skb alloc "
2309 "failed\n", local->dev->name);
2310 return;
2311 }
2312
d041674d 2313 hdr = (struct ieee80211_hdr_4addr *) skb_put(skb, 16);
ff1d2767
JM		 2314
2315 /* Generate a fake pspoll frame to start packet delivery */
c0f72ca8 2316 hdr->frame_ctl = __constant_cpu_to_le16(
4339d328 2317 IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL);
ff1d2767
JM		 2318 memcpy(hdr->addr1, local->dev->dev_addr, ETH_ALEN);
2319 memcpy(hdr->addr2, sta->addr, ETH_ALEN);
2320 hdr->duration_id = cpu_to_le16(sta->aid | BIT(15) | BIT(14));
2321
2322 PDEBUG(DEBUG_PS2, "%s: Scheduling buffered packet delivery for "
2323 "STA " MACSTR "\n", local->dev->name, MAC2STR(sta->addr));
2324
2325 skb->dev = local->dev;
2326
2327 memset(&rx_stats, 0, sizeof(rx_stats));
2328 hostap_rx(local->dev, skb, &rx_stats);
2329}
2330
2331
5fad5a2e
AB		 2332int prism2_ap_get_sta_qual(local_info_t *local, struct sockaddr addr[],
2333 struct iw_quality qual[], int buf_size,
2334 int aplist)
ff1d2767
JM		 2335{
2336 struct ap_data *ap = local->ap;
2337 struct list_head *ptr;
2338 int count = 0;
2339
2340 spin_lock_bh(&ap->sta_table_lock);
2341
2342 for (ptr = ap->sta_list.next; ptr != NULL && ptr != &ap->sta_list;
2343 ptr = ptr->next) {
2344 struct sta_info *sta = (struct sta_info *) ptr;
2345
2346 if (aplist && !sta->ap)
2347 continue;
2348 addr[count].sa_family = ARPHRD_ETHER;
2349 memcpy(addr[count].sa_data, sta->addr, ETH_ALEN);
2350 if (sta->last_rx_silence == 0)
2351 qual[count].qual = sta->last_rx_signal < 27 ?
2352 0 : (sta->last_rx_signal - 27) * 92 / 127;
2353 else
2354 qual[count].qual = sta->last_rx_signal -
2355 sta->last_rx_silence - 35;
2356 qual[count].level = HFA384X_LEVEL_TO_dBm(sta->last_rx_signal);
2357 qual[count].noise = HFA384X_LEVEL_TO_dBm(sta->last_rx_silence);
2358 qual[count].updated = sta->last_rx_updated;
2359
c28df16e 2360 sta->last_rx_updated = IW_QUAL_DBM;
ff1d2767
JM		 2361
2362 count++;
2363 if (count >= buf_size)
2364 break;
2365 }
2366 spin_unlock_bh(&ap->sta_table_lock);
2367
2368 return count;
2369}
2370
2371
2372/* Translate our list of Access Points & Stations to a card independant
2373 * format that the Wireless Tools will understand - Jean II */
5fad5a2e 2374int prism2_ap_translate_scan(struct net_device *dev, char *buffer)
ff1d2767
JM		 2375{
2376 struct hostap_interface *iface;
2377 local_info_t *local;
2378 struct ap_data *ap;
2379 struct list_head *ptr;
2380 struct iw_event iwe;
2381 char *current_ev = buffer;
2382 char *end_buf = buffer + IW_SCAN_MAX_DATA;
2383#if !defined(PRISM2_NO_KERNEL_IEEE80211_MGMT)
2384 char buf[64];
2385#endif
2386
2387 iface = netdev_priv(dev);
2388 local = iface->local;
2389 ap = local->ap;
2390
2391 spin_lock_bh(&ap->sta_table_lock);
2392
2393 for (ptr = ap->sta_list.next; ptr != NULL && ptr != &ap->sta_list;
2394 ptr = ptr->next) {
2395 struct sta_info *sta = (struct sta_info *) ptr;
2396
2397 /* First entry *MUST* be the AP MAC address */
2398 memset(&iwe, 0, sizeof(iwe));
2399 iwe.cmd = SIOCGIWAP;
2400 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
2401 memcpy(iwe.u.ap_addr.sa_data, sta->addr, ETH_ALEN);
2402 iwe.len = IW_EV_ADDR_LEN;
2403 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2404 IW_EV_ADDR_LEN);
2405
2406 /* Use the mode to indicate if it's a station or
2407 * an Access Point */
2408 memset(&iwe, 0, sizeof(iwe));
2409 iwe.cmd = SIOCGIWMODE;
2410 if (sta->ap)
2411 iwe.u.mode = IW_MODE_MASTER;
2412 else
2413 iwe.u.mode = IW_MODE_INFRA;
2414 iwe.len = IW_EV_UINT_LEN;
2415 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2416 IW_EV_UINT_LEN);
2417
2418 /* Some quality */
2419 memset(&iwe, 0, sizeof(iwe));
2420 iwe.cmd = IWEVQUAL;
2421 if (sta->last_rx_silence == 0)
2422 iwe.u.qual.qual = sta->last_rx_signal < 27 ?
2423 0 : (sta->last_rx_signal - 27) * 92 / 127;
2424 else
2425 iwe.u.qual.qual = sta->last_rx_signal -
2426 sta->last_rx_silence - 35;
2427 iwe.u.qual.level = HFA384X_LEVEL_TO_dBm(sta->last_rx_signal);
2428 iwe.u.qual.noise = HFA384X_LEVEL_TO_dBm(sta->last_rx_silence);
2429 iwe.u.qual.updated = sta->last_rx_updated;
2430 iwe.len = IW_EV_QUAL_LEN;
2431 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2432 IW_EV_QUAL_LEN);
2433
2434#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2435 if (sta->ap) {
2436 memset(&iwe, 0, sizeof(iwe));
2437 iwe.cmd = SIOCGIWESSID;
2438 iwe.u.data.length = sta->u.ap.ssid_len;
2439 iwe.u.data.flags = 1;
2440 current_ev = iwe_stream_add_point(current_ev, end_buf,
2441 &iwe,
2442 sta->u.ap.ssid);
2443
2444 memset(&iwe, 0, sizeof(iwe));
2445 iwe.cmd = SIOCGIWENCODE;
2446 if (sta->capability & WLAN_CAPABILITY_PRIVACY)
2447 iwe.u.data.flags =
2448 IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
2449 else
2450 iwe.u.data.flags = IW_ENCODE_DISABLED;
2451 current_ev = iwe_stream_add_point(current_ev, end_buf,
2452 &iwe,
2453 sta->u.ap.ssid
2454 /* 0 byte memcpy */);
2455
2456 if (sta->u.ap.channel > 0 &&
2457 sta->u.ap.channel <= FREQ_COUNT) {
2458 memset(&iwe, 0, sizeof(iwe));
2459 iwe.cmd = SIOCGIWFREQ;
2460 iwe.u.freq.m = freq_list[sta->u.ap.channel - 1]
2461 * 100000;
2462 iwe.u.freq.e = 1;
2463 current_ev = iwe_stream_add_event(
2464 current_ev, end_buf, &iwe,
2465 IW_EV_FREQ_LEN);
2466 }
2467
2468 memset(&iwe, 0, sizeof(iwe));
2469 iwe.cmd = IWEVCUSTOM;
2470 sprintf(buf, "beacon_interval=%d",
2471 sta->listen_interval);
2472 iwe.u.data.length = strlen(buf);
2473 current_ev = iwe_stream_add_point(current_ev, end_buf,
2474 &iwe, buf);
2475 }
2476#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2477
c28df16e 2478 sta->last_rx_updated = IW_QUAL_DBM;
ff1d2767
JM		 2479
2480 /* To be continued, we should make good use of IWEVCUSTOM */
2481 }
2482
2483 spin_unlock_bh(&ap->sta_table_lock);
2484
2485 return current_ev - buffer;
2486}
2487
2488
2489static int prism2_hostapd_add_sta(struct ap_data *ap,
2490 struct prism2_hostapd_param *param)
2491{
2492 struct sta_info *sta;
2493
2494 spin_lock_bh(&ap->sta_table_lock);
2495 sta = ap_get_sta(ap, param->sta_addr);
2496 if (sta)
2497 atomic_inc(&sta->users);
2498 spin_unlock_bh(&ap->sta_table_lock);
2499
2500 if (sta == NULL) {
2501 sta = ap_add_sta(ap, param->sta_addr);
2502 if (sta == NULL)
2503 return -1;
2504 }
2505
2506 if (!(sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
2507 hostap_event_new_sta(sta->local->dev, sta);
2508
2509 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC;
2510 sta->last_rx = jiffies;
2511 sta->aid = param->u.add_sta.aid;
2512 sta->capability = param->u.add_sta.capability;
2513 sta->tx_supp_rates = param->u.add_sta.tx_supp_rates;
2514 if (sta->tx_supp_rates & WLAN_RATE_1M)
2515 sta->supported_rates[0] = 2;
2516 if (sta->tx_supp_rates & WLAN_RATE_2M)
2517 sta->supported_rates[1] = 4;
2518 if (sta->tx_supp_rates & WLAN_RATE_5M5)
2519 sta->supported_rates[2] = 11;
2520 if (sta->tx_supp_rates & WLAN_RATE_11M)
2521 sta->supported_rates[3] = 22;
2522 prism2_check_tx_rates(sta);
2523 atomic_dec(&sta->users);
2524 return 0;
2525}
2526
2527
2528static int prism2_hostapd_remove_sta(struct ap_data *ap,
2529 struct prism2_hostapd_param *param)
2530{
2531 struct sta_info *sta;
2532
2533 spin_lock_bh(&ap->sta_table_lock);
2534 sta = ap_get_sta(ap, param->sta_addr);
2535 if (sta) {
2536 ap_sta_hash_del(ap, sta);
2537 list_del(&sta->list);
2538 }
2539 spin_unlock_bh(&ap->sta_table_lock);
2540
2541 if (!sta)
2542 return -ENOENT;
2543
2544 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
2545 hostap_event_expired_sta(sta->local->dev, sta);
2546 ap_free_sta(ap, sta);
2547
2548 return 0;
2549}
2550
2551
2552static int prism2_hostapd_get_info_sta(struct ap_data *ap,
2553 struct prism2_hostapd_param *param)
2554{
2555 struct sta_info *sta;
2556
2557 spin_lock_bh(&ap->sta_table_lock);
2558 sta = ap_get_sta(ap, param->sta_addr);
2559 if (sta)
2560 atomic_inc(&sta->users);
2561 spin_unlock_bh(&ap->sta_table_lock);
2562
2563 if (!sta)
2564 return -ENOENT;
2565
2566 param->u.get_info_sta.inactive_sec = (jiffies - sta->last_rx) / HZ;
2567
2568 atomic_dec(&sta->users);
2569
2570 return 1;
2571}
2572
2573
2574static int prism2_hostapd_set_flags_sta(struct ap_data *ap,
2575 struct prism2_hostapd_param *param)
2576{
2577 struct sta_info *sta;
2578
2579 spin_lock_bh(&ap->sta_table_lock);
2580 sta = ap_get_sta(ap, param->sta_addr);
2581 if (sta) {
2582 sta->flags |= param->u.set_flags_sta.flags_or;
2583 sta->flags &= param->u.set_flags_sta.flags_and;
2584 }
2585 spin_unlock_bh(&ap->sta_table_lock);
2586
2587 if (!sta)
2588 return -ENOENT;
2589
2590 return 0;
2591}
2592
2593
2594static int prism2_hostapd_sta_clear_stats(struct ap_data *ap,
2595 struct prism2_hostapd_param *param)
2596{
2597 struct sta_info *sta;
2598 int rate;
2599
2600 spin_lock_bh(&ap->sta_table_lock);
2601 sta = ap_get_sta(ap, param->sta_addr);
2602 if (sta) {
2603 sta->rx_packets = sta->tx_packets = 0;
2604 sta->rx_bytes = sta->tx_bytes = 0;
2605 for (rate = 0; rate < WLAN_RATE_COUNT; rate++) {
2606 sta->tx_count[rate] = 0;
2607 sta->rx_count[rate] = 0;
2608 }
2609 }
2610 spin_unlock_bh(&ap->sta_table_lock);
2611
2612 if (!sta)
2613 return -ENOENT;
2614
2615 return 0;
2616}
2617
2618
5fad5a2e 2619int prism2_hostapd(struct ap_data *ap, struct prism2_hostapd_param *param)
ff1d2767
JM		 2620{
2621 switch (param->cmd) {
2622 case PRISM2_HOSTAPD_FLUSH:
2623 ap_control_kickall(ap);
2624 return 0;
2625 case PRISM2_HOSTAPD_ADD_STA:
2626 return prism2_hostapd_add_sta(ap, param);
2627 case PRISM2_HOSTAPD_REMOVE_STA:
2628 return prism2_hostapd_remove_sta(ap, param);
2629 case PRISM2_HOSTAPD_GET_INFO_STA:
2630 return prism2_hostapd_get_info_sta(ap, param);
2631 case PRISM2_HOSTAPD_SET_FLAGS_STA:
2632 return prism2_hostapd_set_flags_sta(ap, param);
2633 case PRISM2_HOSTAPD_STA_CLEAR_STATS:
2634 return prism2_hostapd_sta_clear_stats(ap, param);
2635 default:
2636 printk(KERN_WARNING "prism2_hostapd: unknown cmd=%d\n",
2637 param->cmd);
2638 return -EOPNOTSUPP;
2639 }
2640}
2641
2642
2643/* Update station info for host-based TX rate control and return current
2644 * TX rate */
2645static int ap_update_sta_tx_rate(struct sta_info *sta, struct net_device *dev)
2646{
2647 int ret = sta->tx_rate;
2648 struct hostap_interface *iface;
2649 local_info_t *local;
2650
2651 iface = netdev_priv(dev);
2652 local = iface->local;
2653
2654 sta->tx_count[sta->tx_rate_idx]++;
2655 sta->tx_since_last_failure++;
2656 sta->tx_consecutive_exc = 0;
2657 if (sta->tx_since_last_failure >= WLAN_RATE_UPDATE_COUNT &&
2658 sta->tx_rate_idx < sta->tx_max_rate) {
2659 /* use next higher rate */
2660 int old_rate, new_rate;
2661 old_rate = new_rate = sta->tx_rate_idx;
2662 while (new_rate < sta->tx_max_rate) {
2663 new_rate++;
2664 if (ap_tx_rate_ok(new_rate, sta, local)) {
2665 sta->tx_rate_idx = new_rate;
2666 break;
2667 }
2668 }
2669 if (old_rate != sta->tx_rate_idx) {
2670 switch (sta->tx_rate_idx) {
2671 case 0: sta->tx_rate = 10; break;
2672 case 1: sta->tx_rate = 20; break;
2673 case 2: sta->tx_rate = 55; break;
2674 case 3: sta->tx_rate = 110; break;
2675 default: sta->tx_rate = 0; break;
2676 }
2677 PDEBUG(DEBUG_AP, "%s: STA " MACSTR " TX rate raised to"
2678 " %d\n", dev->name, MAC2STR(sta->addr),
2679 sta->tx_rate);
2680 }
2681 sta->tx_since_last_failure = 0;
2682 }
2683
2684 return ret;
2685}
2686
2687
2688/* Called only from software IRQ. Called for each TX frame prior possible
2689 * encryption and transmit. */
2690ap_tx_ret hostap_handle_sta_tx(local_info_t *local, struct hostap_tx_data *tx)
2691{
2692 struct sta_info *sta = NULL;
2693 struct sk_buff *skb = tx->skb;
2694 int set_tim, ret;
d041674d 2695 struct ieee80211_hdr_4addr *hdr;
ff1d2767
JM		 2696 struct hostap_skb_tx_data *meta;
2697
2698 meta = (struct hostap_skb_tx_data *) skb->cb;
2699 ret = AP_TX_CONTINUE;
2700 if (local->ap == NULL || skb->len < 10 ||
2701 meta->iface->type == HOSTAP_INTERFACE_STA)
2702 goto out;
2703
d041674d 2704 hdr = (struct ieee80211_hdr_4addr *) skb->data;
ff1d2767
JM		 2705
2706 if (hdr->addr1[0] & 0x01) {
2707 /* broadcast/multicast frame - no AP related processing */
2708 goto out;
2709 }
2710
2711 /* unicast packet - check whether destination STA is associated */
2712 spin_lock(&local->ap->sta_table_lock);
2713 sta = ap_get_sta(local->ap, hdr->addr1);
2714 if (sta)
2715 atomic_inc(&sta->users);
2716 spin_unlock(&local->ap->sta_table_lock);
2717
5bee720f
JM		 2718 if (local->iw_mode == IW_MODE_MASTER && sta == NULL &&
2719 !(meta->flags & HOSTAP_TX_FLAGS_WDS) &&
ff1d2767
JM		 2720 meta->iface->type != HOSTAP_INTERFACE_MASTER &&
2721 meta->iface->type != HOSTAP_INTERFACE_AP) {
2722#if 0
2723 /* This can happen, e.g., when wlan0 is added to a bridge and
2724 * bridging code does not know which port is the correct target
2725 * for a unicast frame. In this case, the packet is send to all
2726 * ports of the bridge. Since this is a valid scenario, do not
2727 * print out any errors here. */
2728 if (net_ratelimit()) {
2729 printk(KERN_DEBUG "AP: drop packet to non-associated "
2730 "STA " MACSTR "\n", MAC2STR(hdr->addr1));
2731 }
2732#endif
2733 local->ap->tx_drop_nonassoc++;
2734 ret = AP_TX_DROP;
2735 goto out;
2736 }
2737
2738 if (sta == NULL)
2739 goto out;
2740
2741 if (!(sta->flags & WLAN_STA_AUTHORIZED))
2742 ret = AP_TX_CONTINUE_NOT_AUTHORIZED;
2743
2744 /* Set tx_rate if using host-based TX rate control */
2745 if (!local->fw_tx_rate_control)
2746 local->ap->last_tx_rate = meta->rate =
2747 ap_update_sta_tx_rate(sta, local->dev);
2748
2749 if (local->iw_mode != IW_MODE_MASTER)
2750 goto out;
2751
2752 if (!(sta->flags & WLAN_STA_PS))
2753 goto out;
2754
5bee720f
JM		 2755 if (meta->flags & HOSTAP_TX_FLAGS_ADD_MOREDATA) {
2756 /* indicate to STA that more frames follow */
b2f4a2e3
JM		 2757 hdr->frame_ctl |=
2758 __constant_cpu_to_le16(IEEE80211_FCTL_MOREDATA);
5bee720f 2759 }
ff1d2767 2760
5bee720f
JM		 2761 if (meta->flags & HOSTAP_TX_FLAGS_BUFFERED_FRAME) {
2762 /* packet was already buffered and now send due to
2763 * PS poll, so do not rebuffer it */
2764 goto out;
ff1d2767
JM		 2765 }
2766
2767 if (skb_queue_len(&sta->tx_buf) >= STA_MAX_TX_BUFFER) {
2768 PDEBUG(DEBUG_PS, "%s: No more space in STA (" MACSTR ")'s PS "
2769 "mode buffer\n", local->dev->name, MAC2STR(sta->addr));
2770 /* Make sure that TIM is set for the station (it might not be
2771 * after AP wlan hw reset). */
2772 /* FIX: should fix hw reset to restore bits based on STA
2773 * buffer state.. */
2774 hostap_set_tim(local, sta->aid, 1);
2775 sta->flags |= WLAN_STA_TIM;
2776 ret = AP_TX_DROP;
2777 goto out;
2778 }
2779
2780 /* STA in PS mode, buffer frame for later delivery */
2781 set_tim = skb_queue_empty(&sta->tx_buf);
2782 skb_queue_tail(&sta->tx_buf, skb);
2783 /* FIX: could save RX time to skb and expire buffered frames after
2784 * some time if STA does not poll for them */
2785
2786 if (set_tim) {
2787 if (sta->flags & WLAN_STA_TIM)
2788 PDEBUG(DEBUG_PS2, "Re-setting TIM for aid %d\n",
2789 sta->aid);
2790 hostap_set_tim(local, sta->aid, 1);
2791 sta->flags |= WLAN_STA_TIM;
2792 }
2793
2794 ret = AP_TX_BUFFERED;
2795
2796 out:
2797 if (sta != NULL) {
2798 if (ret == AP_TX_CONTINUE ||
2799 ret == AP_TX_CONTINUE_NOT_AUTHORIZED) {
2800 sta->tx_packets++;
2801 sta->tx_bytes += skb->len;
2802 sta->last_tx = jiffies;
2803 }
2804
2805 if ((ret == AP_TX_CONTINUE ||
2806 ret == AP_TX_CONTINUE_NOT_AUTHORIZED) &&
2807 sta->crypt && tx->host_encrypt) {
2808 tx->crypt = sta->crypt;
2809 tx->sta_ptr = sta; /* hostap_handle_sta_release() will
2810 * be called to release sta info
2811 * later */
2812 } else
2813 atomic_dec(&sta->users);
2814 }
2815
2816 return ret;
2817}
2818
2819
2820void hostap_handle_sta_release(void *ptr)
2821{
2822 struct sta_info *sta = ptr;
2823 atomic_dec(&sta->users);
2824}
2825
2826
2827/* Called only as a tasklet (software IRQ) */
2828void hostap_handle_sta_tx_exc(local_info_t *local, struct sk_buff *skb)
2829{
2830 struct sta_info *sta;
d041674d 2831 struct ieee80211_hdr_4addr *hdr;
ff1d2767
JM		 2832 struct hostap_skb_tx_data *meta;
2833
d041674d 2834 hdr = (struct ieee80211_hdr_4addr *) skb->data;
ff1d2767
JM		 2835 meta = (struct hostap_skb_tx_data *) skb->cb;
2836
2837 spin_lock(&local->ap->sta_table_lock);
2838 sta = ap_get_sta(local->ap, hdr->addr1);
2839 if (!sta) {
2840 spin_unlock(&local->ap->sta_table_lock);
2841 PDEBUG(DEBUG_AP, "%s: Could not find STA " MACSTR " for this "
2842 "TX error (@%lu)\n",
2843 local->dev->name, MAC2STR(hdr->addr1), jiffies);
2844 return;
2845 }
2846
2847 sta->tx_since_last_failure = 0;
2848 sta->tx_consecutive_exc++;
74fae82c 2849
ff1d2767
JM		 2850 if (sta->tx_consecutive_exc >= WLAN_RATE_DECREASE_THRESHOLD &&
2851 sta->tx_rate_idx > 0 && meta->rate <= sta->tx_rate) {
2852 /* use next lower rate */
2853 int old, rate;
2854 old = rate = sta->tx_rate_idx;
2855 while (rate > 0) {
2856 rate--;
2857 if (ap_tx_rate_ok(rate, sta, local)) {
2858 sta->tx_rate_idx = rate;
2859 break;
2860 }
2861 }
2862 if (old != sta->tx_rate_idx) {
2863 switch (sta->tx_rate_idx) {
2864 case 0: sta->tx_rate = 10; break;
2865 case 1: sta->tx_rate = 20; break;
2866 case 2: sta->tx_rate = 55; break;
2867 case 3: sta->tx_rate = 110; break;
2868 default: sta->tx_rate = 0; break;
2869 }
2870 PDEBUG(DEBUG_AP, "%s: STA " MACSTR " TX rate lowered "
2871 "to %d\n", local->dev->name, MAC2STR(sta->addr),
2872 sta->tx_rate);
2873 }
2874 sta->tx_consecutive_exc = 0;
2875 }
2876 spin_unlock(&local->ap->sta_table_lock);
2877}
2878
2879
2880static void hostap_update_sta_ps2(local_info_t *local, struct sta_info *sta,
2881 int pwrmgt, int type, int stype)
2882{
2883 if (pwrmgt && !(sta->flags & WLAN_STA_PS)) {
2884 sta->flags |= WLAN_STA_PS;
2885 PDEBUG(DEBUG_PS2, "STA " MACSTR " changed to use PS "
2886 "mode (type=0x%02X, stype=0x%02X)\n",
4339d328 2887 MAC2STR(sta->addr), type >> 2, stype >> 4);
ff1d2767
JM		 2888 } else if (!pwrmgt && (sta->flags & WLAN_STA_PS)) {
2889 sta->flags &= ~WLAN_STA_PS;
2890 PDEBUG(DEBUG_PS2, "STA " MACSTR " changed to not use "
2891 "PS mode (type=0x%02X, stype=0x%02X)\n",
4339d328
JM		 2892 MAC2STR(sta->addr), type >> 2, stype >> 4);
2893 if (type != IEEE80211_FTYPE_CTL ||
2894 stype != IEEE80211_STYPE_PSPOLL)
ff1d2767
JM		 2895 schedule_packet_send(local, sta);
2896 }
2897}
2898
2899
2900/* Called only as a tasklet (software IRQ). Called for each RX frame to update
c0f72ca8 2901 * STA power saving state. pwrmgt is a flag from 802.11 frame_ctl field. */
d041674d 2902int hostap_update_sta_ps(local_info_t *local, struct ieee80211_hdr_4addr *hdr)
ff1d2767
JM		 2903{
2904 struct sta_info *sta;
2905 u16 fc;
2906
2907 spin_lock(&local->ap->sta_table_lock);
2908 sta = ap_get_sta(local->ap, hdr->addr2);
2909 if (sta)
2910 atomic_inc(&sta->users);
2911 spin_unlock(&local->ap->sta_table_lock);
2912
2913 if (!sta)
2914 return -1;
2915
c0f72ca8 2916 fc = le16_to_cpu(hdr->frame_ctl);
b2f4a2e3 2917 hostap_update_sta_ps2(local, sta, fc & IEEE80211_FCTL_PM,
4339d328 2918 WLAN_FC_GET_TYPE(fc), WLAN_FC_GET_STYPE(fc));
ff1d2767
JM		 2919
2920 atomic_dec(&sta->users);
2921 return 0;
2922}
2923
2924
2925/* Called only as a tasklet (software IRQ). Called for each RX frame after
2926 * getting RX header and payload from hardware. */
2927ap_rx_ret hostap_handle_sta_rx(local_info_t *local, struct net_device *dev,
2928 struct sk_buff *skb,
2929 struct hostap_80211_rx_status *rx_stats,
2930 int wds)
2931{
2932 int ret;
2933 struct sta_info *sta;
2934 u16 fc, type, stype;
d041674d 2935 struct ieee80211_hdr_4addr *hdr;
ff1d2767
JM		 2936
2937 if (local->ap == NULL)
2938 return AP_RX_CONTINUE;
2939
d041674d 2940 hdr = (struct ieee80211_hdr_4addr *) skb->data;
ff1d2767 2941
c0f72ca8 2942 fc = le16_to_cpu(hdr->frame_ctl);
4339d328
JM		 2943 type = WLAN_FC_GET_TYPE(fc);
2944 stype = WLAN_FC_GET_STYPE(fc);
ff1d2767
JM		 2945
2946 spin_lock(&local->ap->sta_table_lock);
2947 sta = ap_get_sta(local->ap, hdr->addr2);
2948 if (sta)
2949 atomic_inc(&sta->users);
2950 spin_unlock(&local->ap->sta_table_lock);
2951
2952 if (sta && !(sta->flags & WLAN_STA_AUTHORIZED))
2953 ret = AP_RX_CONTINUE_NOT_AUTHORIZED;
2954 else
2955 ret = AP_RX_CONTINUE;
2956
2957
b2f4a2e3 2958 if (fc & IEEE80211_FCTL_TODS) {
ff1d2767
JM		 2959 if (!wds && (sta == NULL || !(sta->flags & WLAN_STA_ASSOC))) {
2960 if (local->hostapd) {
2961 prism2_rx_80211(local->apdev, skb, rx_stats,
2962 PRISM2_RX_NON_ASSOC);
2963#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2964 } else {
2965 printk(KERN_DEBUG "%s: dropped received packet"
2966 " from non-associated STA " MACSTR
2967 " (type=0x%02x, subtype=0x%02x)\n",
4339d328
JM		 2968 dev->name, MAC2STR(hdr->addr2),
2969 type >> 2, stype >> 4);
ff1d2767
JM		 2970 hostap_rx(dev, skb, rx_stats);
2971#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2972 }
2973 ret = AP_RX_EXIT;
2974 goto out;
2975 }
b2f4a2e3 2976 } else if (fc & IEEE80211_FCTL_FROMDS) {
ff1d2767
JM		 2977 if (!wds) {
2978 /* FromDS frame - not for us; probably
2979 * broadcast/multicast in another BSS - drop */
2980 if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
2981 printk(KERN_DEBUG "Odd.. FromDS packet "
2982 "received with own BSSID\n");
2983 hostap_dump_rx_80211(dev->name, skb, rx_stats);
2984 }
2985 ret = AP_RX_DROP;
2986 goto out;
2987 }
4339d328 2988 } else if (stype == IEEE80211_STYPE_NULLFUNC && sta == NULL &&
ff1d2767
JM		 2989 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
2990
2991 if (local->hostapd) {
2992 prism2_rx_80211(local->apdev, skb, rx_stats,
2993 PRISM2_RX_NON_ASSOC);
2994#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2995 } else {
2996 /* At least Lucent f/w seems to send data::nullfunc
2997 * frames with no ToDS flag when the current AP returns
2998 * after being unavailable for some time. Speed up
2999 * re-association by informing the station about it not
3000 * being associated. */
3001 printk(KERN_DEBUG "%s: rejected received nullfunc "
3002 "frame without ToDS from not associated STA "
3003 MACSTR "\n",
3004 dev->name, MAC2STR(hdr->addr2));
3005 hostap_rx(dev, skb, rx_stats);
3006#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
3007 }
3008 ret = AP_RX_EXIT;
3009 goto out;
4339d328 3010 } else if (stype == IEEE80211_STYPE_NULLFUNC) {
ff1d2767
JM		 3011 /* At least Lucent cards seem to send periodic nullfunc
3012 * frames with ToDS. Let these through to update SQ
3013 * stats and PS state. Nullfunc frames do not contain
3014 * any data and they will be dropped below. */
3015 } else {
3016 /* If BSSID (Addr3) is foreign, this frame is a normal
3017 * broadcast frame from an IBSS network. Drop it silently.
3018 * If BSSID is own, report the dropping of this frame. */
3019 if (memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
3020 printk(KERN_DEBUG "%s: dropped received packet from "
3021 MACSTR " with no ToDS flag (type=0x%02x, "
3022 "subtype=0x%02x)\n", dev->name,
4339d328 3023 MAC2STR(hdr->addr2), type >> 2, stype >> 4);
ff1d2767
JM		 3024 hostap_dump_rx_80211(dev->name, skb, rx_stats);
3025 }
3026 ret = AP_RX_DROP;
3027 goto out;
3028 }
3029
3030 if (sta) {
b2f4a2e3 3031 hostap_update_sta_ps2(local, sta, fc & IEEE80211_FCTL_PM,
ff1d2767
JM		 3032 type, stype);
3033
3034 sta->rx_packets++;
3035 sta->rx_bytes += skb->len;
3036 sta->last_rx = jiffies;
3037 }
3038
4339d328 3039 if (local->ap->nullfunc_ack && stype == IEEE80211_STYPE_NULLFUNC &&
b2f4a2e3 3040 fc & IEEE80211_FCTL_TODS) {
ff1d2767
JM		 3041 if (local->hostapd) {
3042 prism2_rx_80211(local->apdev, skb, rx_stats,
3043 PRISM2_RX_NULLFUNC_ACK);
3044#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
3045 } else {
3046 /* some STA f/w's seem to require control::ACK frame
3047 * for data::nullfunc, but Prism2 f/w 0.8.0 (at least
3048 * from Compaq) does not send this.. Try to generate
3049 * ACK for these frames from the host driver to make
3050 * power saving work with, e.g., Lucent WaveLAN f/w */
3051 hostap_rx(dev, skb, rx_stats);
3052#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
3053 }
3054 ret = AP_RX_EXIT;
3055 goto out;
3056 }
3057
3058 out:
3059 if (sta)
3060 atomic_dec(&sta->users);
3061
3062 return ret;
3063}
3064
3065
3066/* Called only as a tasklet (software IRQ) */
3067int hostap_handle_sta_crypto(local_info_t *local,
d041674d 3068 struct ieee80211_hdr_4addr *hdr,
62fe7e37
JM		 3069 struct ieee80211_crypt_data **crypt,
3070 void **sta_ptr)
ff1d2767
JM		 3071{
3072 struct sta_info *sta;
3073
3074 spin_lock(&local->ap->sta_table_lock);
3075 sta = ap_get_sta(local->ap, hdr->addr2);
3076 if (sta)
3077 atomic_inc(&sta->users);
3078 spin_unlock(&local->ap->sta_table_lock);
3079
3080 if (!sta)
3081 return -1;
3082
3083 if (sta->crypt) {
3084 *crypt = sta->crypt;
3085 *sta_ptr = sta;
3086 /* hostap_handle_sta_release() will be called to release STA
3087 * info */
3088 } else
3089 atomic_dec(&sta->users);
3090
3091 return 0;
3092}
3093
3094
3095/* Called only as a tasklet (software IRQ) */
3096int hostap_is_sta_assoc(struct ap_data *ap, u8 *sta_addr)
3097{
3098 struct sta_info *sta;
3099 int ret = 0;
3100
3101 spin_lock(&ap->sta_table_lock);
3102 sta = ap_get_sta(ap, sta_addr);
3103 if (sta != NULL && (sta->flags & WLAN_STA_ASSOC) && !sta->ap)
3104 ret = 1;
3105 spin_unlock(&ap->sta_table_lock);
3106
3107 return ret;
3108}
3109
3110
3111/* Called only as a tasklet (software IRQ) */
3112int hostap_is_sta_authorized(struct ap_data *ap, u8 *sta_addr)
3113{
3114 struct sta_info *sta;
3115 int ret = 0;
3116
3117 spin_lock(&ap->sta_table_lock);
3118 sta = ap_get_sta(ap, sta_addr);
3119 if (sta != NULL && (sta->flags & WLAN_STA_ASSOC) && !sta->ap &&
3120 ((sta->flags & WLAN_STA_AUTHORIZED) ||
3121 ap->local->ieee_802_1x == 0))
3122 ret = 1;
3123 spin_unlock(&ap->sta_table_lock);
3124
3125 return ret;
3126}
3127
3128
3129/* Called only as a tasklet (software IRQ) */
3130int hostap_add_sta(struct ap_data *ap, u8 *sta_addr)
3131{
3132 struct sta_info *sta;
3133 int ret = 1;
3134
3135 if (!ap)
3136 return -1;
3137
3138 spin_lock(&ap->sta_table_lock);
3139 sta = ap_get_sta(ap, sta_addr);
3140 if (sta)
3141 ret = 0;
3142 spin_unlock(&ap->sta_table_lock);
3143
3144 if (ret == 1) {
3145 sta = ap_add_sta(ap, sta_addr);
3146 if (!sta)
54b85f48 3147 return -1;
ff1d2767
JM		 3148 sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
3149 sta->ap = 1;
3150 memset(sta->supported_rates, 0, sizeof(sta->supported_rates));
3151 /* No way of knowing which rates are supported since we did not
3152 * get supported rates element from beacon/assoc req. Assume
3153 * that remote end supports all 802.11b rates. */
3154 sta->supported_rates[0] = 0x82;
3155 sta->supported_rates[1] = 0x84;
3156 sta->supported_rates[2] = 0x0b;
3157 sta->supported_rates[3] = 0x16;
3158 sta->tx_supp_rates = WLAN_RATE_1M | WLAN_RATE_2M |
3159 WLAN_RATE_5M5 | WLAN_RATE_11M;
3160 sta->tx_rate = 110;
3161 sta->tx_max_rate = sta->tx_rate_idx = 3;
3162 }
3163
3164 return ret;
3165}
3166
3167
3168/* Called only as a tasklet (software IRQ) */
3169int hostap_update_rx_stats(struct ap_data *ap,
d041674d 3170 struct ieee80211_hdr_4addr *hdr,
ff1d2767
JM		 3171 struct hostap_80211_rx_status *rx_stats)
3172{
3173 struct sta_info *sta;
3174
3175 if (!ap)
3176 return -1;
3177
3178 spin_lock(&ap->sta_table_lock);
3179 sta = ap_get_sta(ap, hdr->addr2);
3180 if (sta) {
3181 sta->last_rx_silence = rx_stats->noise;
3182 sta->last_rx_signal = rx_stats->signal;
3183 sta->last_rx_rate = rx_stats->rate;
c28df16e 3184 sta->last_rx_updated = IW_QUAL_ALL_UPDATED | IW_QUAL_DBM;
ff1d2767
JM		 3185 if (rx_stats->rate == 10)
3186 sta->rx_count[0]++;
3187 else if (rx_stats->rate == 20)
3188 sta->rx_count[1]++;
3189 else if (rx_stats->rate == 55)
3190 sta->rx_count[2]++;
3191 else if (rx_stats->rate == 110)
3192 sta->rx_count[3]++;
3193 }
3194 spin_unlock(&ap->sta_table_lock);
3195
3196 return sta ? 0 : -1;
3197}
3198
3199
3200void hostap_update_rates(local_info_t *local)
3201{
3202 struct list_head *ptr;
3203 struct ap_data *ap = local->ap;
3204
3205 if (!ap)
3206 return;
3207
3208 spin_lock_bh(&ap->sta_table_lock);
3209 for (ptr = ap->sta_list.next; ptr != &ap->sta_list; ptr = ptr->next) {
3210 struct sta_info *sta = (struct sta_info *) ptr;
3211 prism2_check_tx_rates(sta);
3212 }
3213 spin_unlock_bh(&ap->sta_table_lock);
3214}
3215
3216
5fad5a2e
AB		 3217void * ap_crypt_get_ptrs(struct ap_data *ap, u8 *addr, int permanent,
3218 struct ieee80211_crypt_data ***crypt)
ff1d2767
JM		 3219{
3220 struct sta_info *sta;
3221
3222 spin_lock_bh(&ap->sta_table_lock);
3223 sta = ap_get_sta(ap, addr);
3224 if (sta)
3225 atomic_inc(&sta->users);
3226 spin_unlock_bh(&ap->sta_table_lock);
3227
3228 if (!sta && permanent)
3229 sta = ap_add_sta(ap, addr);
3230
3231 if (!sta)
3232 return NULL;
3233
3234 if (permanent)
3235 sta->flags |= WLAN_STA_PERM;
3236
3237 *crypt = &sta->crypt;
3238
3239 return sta;
3240}
3241
3242
3243void hostap_add_wds_links(local_info_t *local)
3244{
3245 struct ap_data *ap = local->ap;
3246 struct list_head *ptr;
3247
3248 spin_lock_bh(&ap->sta_table_lock);
3249 list_for_each(ptr, &ap->sta_list) {
3250 struct sta_info *sta = list_entry(ptr, struct sta_info, list);
3251 if (sta->ap)
3252 hostap_wds_link_oper(local, sta->addr, WDS_ADD);
3253 }
3254 spin_unlock_bh(&ap->sta_table_lock);
3255
3256 schedule_work(&local->ap->wds_oper_queue);
3257}
3258
3259
3260void hostap_wds_link_oper(local_info_t *local, u8 *addr, wds_oper_type type)
3261{
3262 struct wds_oper_data *entry;
3263
3264 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
3265 if (!entry)
3266 return;
3267 memcpy(entry->addr, addr, ETH_ALEN);
3268 entry->type = type;
3269 spin_lock_bh(&local->lock);
3270 entry->next = local->ap->wds_oper_entries;
3271 local->ap->wds_oper_entries = entry;
3272 spin_unlock_bh(&local->lock);
3273
3274 schedule_work(&local->ap->wds_oper_queue);
3275}
3276
3277
3278EXPORT_SYMBOL(hostap_init_data);
3279EXPORT_SYMBOL(hostap_init_ap_proc);
3280EXPORT_SYMBOL(hostap_free_data);
3281EXPORT_SYMBOL(hostap_check_sta_fw_version);
ff1d2767 3282EXPORT_SYMBOL(hostap_handle_sta_tx_exc);
ff1d2767 3283#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
ff1d2767 3284#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
Linux 6.x block layer and io_uring tree(s)