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[SK_BUFF]: Introduce skb_reset_mac_header(skb)
[deliverable/linux.git] / drivers / net / wireless / hostap / hostap_ap.c
CommitLineData
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;
459a98ed
ACM		 985 skb_reset_mac_header(skb);
986 skb->nh.raw = skb->data;
ff1d2767
JM		 987 dev_queue_xmit(skb);
988}
989#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
990
991
992static int prism2_sta_proc_read(char *page, char **start, off_t off,
993 int count, int *eof, void *data)
994{
995 char *p = page;
996 struct sta_info *sta = (struct sta_info *) data;
997 int i;
998
999 /* FIX: possible race condition.. the STA data could have just expired,
1000 * but proc entry was still here so that the read could have started;
1001 * some locking should be done here.. */
1002
1003 if (off != 0) {
1004 *eof = 1;
1005 return 0;
1006 }
1007
1008 p += sprintf(p, "%s=" MACSTR "\nusers=%d\naid=%d\n"
1009 "flags=0x%04x%s%s%s%s%s%s%s\n"
1010 "capability=0x%02x\nlisten_interval=%d\nsupported_rates=",
1011 sta->ap ? "AP" : "STA",
1012 MAC2STR(sta->addr), atomic_read(&sta->users), sta->aid,
1013 sta->flags,
1014 sta->flags & WLAN_STA_AUTH ? " AUTH" : "",
1015 sta->flags & WLAN_STA_ASSOC ? " ASSOC" : "",
1016 sta->flags & WLAN_STA_PS ? " PS" : "",
1017 sta->flags & WLAN_STA_TIM ? " TIM" : "",
1018 sta->flags & WLAN_STA_PERM ? " PERM" : "",
1019 sta->flags & WLAN_STA_AUTHORIZED ? " AUTHORIZED" : "",
1020 sta->flags & WLAN_STA_PENDING_POLL ? " POLL" : "",
1021 sta->capability, sta->listen_interval);
1022 /* supported_rates: 500 kbit/s units with msb ignored */
1023 for (i = 0; i < sizeof(sta->supported_rates); i++)
1024 if (sta->supported_rates[i] != 0)
1025 p += sprintf(p, "%d%sMbps ",
1026 (sta->supported_rates[i] & 0x7f) / 2,
1027 sta->supported_rates[i] & 1 ? ".5" : "");
1028 p += sprintf(p, "\njiffies=%lu\nlast_auth=%lu\nlast_assoc=%lu\n"
1029 "last_rx=%lu\nlast_tx=%lu\nrx_packets=%lu\n"
1030 "tx_packets=%lu\n"
1031 "rx_bytes=%lu\ntx_bytes=%lu\nbuffer_count=%d\n"
1032 "last_rx: silence=%d dBm signal=%d dBm rate=%d%s Mbps\n"
1033 "tx_rate=%d\ntx[1M]=%d\ntx[2M]=%d\ntx[5.5M]=%d\n"
1034 "tx[11M]=%d\n"
1035 "rx[1M]=%d\nrx[2M]=%d\nrx[5.5M]=%d\nrx[11M]=%d\n",
1036 jiffies, sta->last_auth, sta->last_assoc, sta->last_rx,
1037 sta->last_tx,
1038 sta->rx_packets, sta->tx_packets, sta->rx_bytes,
1039 sta->tx_bytes, skb_queue_len(&sta->tx_buf),
1040 sta->last_rx_silence,
1041 sta->last_rx_signal, sta->last_rx_rate / 10,
1042 sta->last_rx_rate % 10 ? ".5" : "",
1043 sta->tx_rate, sta->tx_count[0], sta->tx_count[1],
1044 sta->tx_count[2], sta->tx_count[3], sta->rx_count[0],
1045 sta->rx_count[1], sta->rx_count[2], sta->rx_count[3]);
1046 if (sta->crypt && sta->crypt->ops && sta->crypt->ops->print_stats)
1047 p = sta->crypt->ops->print_stats(p, sta->crypt->priv);
1048#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1049 if (sta->ap) {
1050 if (sta->u.ap.channel >= 0)
1051 p += sprintf(p, "channel=%d\n", sta->u.ap.channel);
1052 p += sprintf(p, "ssid=");
1053 for (i = 0; i < sta->u.ap.ssid_len; i++)
1054 p += sprintf(p, ((sta->u.ap.ssid[i] >= 32 &&
1055 sta->u.ap.ssid[i] < 127) ?
1056 "%c" : "<%02x>"),
1057 sta->u.ap.ssid[i]);
1058 p += sprintf(p, "\n");
1059 }
1060#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1061
1062 return (p - page);
1063}
1064
1065
c4028958 1066static void handle_add_proc_queue(struct work_struct *work)
ff1d2767 1067{
c4028958
DH		 1068 struct ap_data *ap = container_of(work, struct ap_data,
1069 add_sta_proc_queue);
ff1d2767
JM		 1070 struct sta_info *sta;
1071 char name[20];
1072 struct add_sta_proc_data *entry, *prev;
1073
1074 entry = ap->add_sta_proc_entries;
1075 ap->add_sta_proc_entries = NULL;
1076
1077 while (entry) {
1078 spin_lock_bh(&ap->sta_table_lock);
1079 sta = ap_get_sta(ap, entry->addr);
1080 if (sta)
1081 atomic_inc(&sta->users);
1082 spin_unlock_bh(&ap->sta_table_lock);
1083
1084 if (sta) {
1085 sprintf(name, MACSTR, MAC2STR(sta->addr));
1086 sta->proc = create_proc_read_entry(
1087 name, 0, ap->proc,
1088 prism2_sta_proc_read, sta);
1089
1090 atomic_dec(&sta->users);
1091 }
1092
1093 prev = entry;
1094 entry = entry->next;
1095 kfree(prev);
1096 }
1097}
1098
1099
1100static struct sta_info * ap_add_sta(struct ap_data *ap, u8 *addr)
1101{
1102 struct sta_info *sta;
1103
b0471bb7 1104 sta = kzalloc(sizeof(struct sta_info), GFP_ATOMIC);
ff1d2767
JM		 1105 if (sta == NULL) {
1106 PDEBUG(DEBUG_AP, "AP: kmalloc failed\n");
1107 return NULL;
1108 }
1109
1110 /* initialize STA info data */
ff1d2767
JM		 1111 sta->local = ap->local;
1112 skb_queue_head_init(&sta->tx_buf);
1113 memcpy(sta->addr, addr, ETH_ALEN);
1114
1115 atomic_inc(&sta->users);
1116 spin_lock_bh(&ap->sta_table_lock);
1117 list_add(&sta->list, &ap->sta_list);
1118 ap->num_sta++;
1119 ap_sta_hash_add(ap, sta);
1120 spin_unlock_bh(&ap->sta_table_lock);
1121
1122 if (ap->proc) {
1123 struct add_sta_proc_data *entry;
1124 /* schedule a non-interrupt context process to add a procfs
1125 * entry for the STA since procfs code use GFP_KERNEL */
1126 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
1127 if (entry) {
1128 memcpy(entry->addr, sta->addr, ETH_ALEN);
1129 entry->next = ap->add_sta_proc_entries;
1130 ap->add_sta_proc_entries = entry;
1131 schedule_work(&ap->add_sta_proc_queue);
1132 } else
1133 printk(KERN_DEBUG "Failed to add STA proc data\n");
1134 }
1135
1136#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1137 init_timer(&sta->timer);
1138 sta->timer.expires = jiffies + ap->max_inactivity;
1139 sta->timer.data = (unsigned long) sta;
1140 sta->timer.function = ap_handle_timer;
1141 if (!ap->local->hostapd)
1142 add_timer(&sta->timer);
1143#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1144
1145 return sta;
1146}
1147
1148
1149static int ap_tx_rate_ok(int rateidx, struct sta_info *sta,
1150 local_info_t *local)
1151{
1152 if (rateidx > sta->tx_max_rate ||
1153 !(sta->tx_supp_rates & (1 << rateidx)))
1154 return 0;
1155
1156 if (local->tx_rate_control != 0 &&
1157 !(local->tx_rate_control & (1 << rateidx)))
1158 return 0;
1159
1160 return 1;
1161}
1162
1163
1164static void prism2_check_tx_rates(struct sta_info *sta)
1165{
1166 int i;
1167
1168 sta->tx_supp_rates = 0;
1169 for (i = 0; i < sizeof(sta->supported_rates); i++) {
1170 if ((sta->supported_rates[i] & 0x7f) == 2)
1171 sta->tx_supp_rates |= WLAN_RATE_1M;
1172 if ((sta->supported_rates[i] & 0x7f) == 4)
1173 sta->tx_supp_rates |= WLAN_RATE_2M;
1174 if ((sta->supported_rates[i] & 0x7f) == 11)
1175 sta->tx_supp_rates |= WLAN_RATE_5M5;
1176 if ((sta->supported_rates[i] & 0x7f) == 22)
1177 sta->tx_supp_rates |= WLAN_RATE_11M;
1178 }
1179 sta->tx_max_rate = sta->tx_rate = sta->tx_rate_idx = 0;
1180 if (sta->tx_supp_rates & WLAN_RATE_1M) {
1181 sta->tx_max_rate = 0;
1182 if (ap_tx_rate_ok(0, sta, sta->local)) {
1183 sta->tx_rate = 10;
1184 sta->tx_rate_idx = 0;
1185 }
1186 }
1187 if (sta->tx_supp_rates & WLAN_RATE_2M) {
1188 sta->tx_max_rate = 1;
1189 if (ap_tx_rate_ok(1, sta, sta->local)) {
1190 sta->tx_rate = 20;
1191 sta->tx_rate_idx = 1;
1192 }
1193 }
1194 if (sta->tx_supp_rates & WLAN_RATE_5M5) {
1195 sta->tx_max_rate = 2;
1196 if (ap_tx_rate_ok(2, sta, sta->local)) {
1197 sta->tx_rate = 55;
1198 sta->tx_rate_idx = 2;
1199 }
1200 }
1201 if (sta->tx_supp_rates & WLAN_RATE_11M) {
1202 sta->tx_max_rate = 3;
1203 if (ap_tx_rate_ok(3, sta, sta->local)) {
1204 sta->tx_rate = 110;
1205 sta->tx_rate_idx = 3;
1206 }
1207 }
1208}
1209
1210
1211#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1212
1213static void ap_crypt_init(struct ap_data *ap)
1214{
62fe7e37 1215 ap->crypt = ieee80211_get_crypto_ops("WEP");
ff1d2767
JM		 1216
1217 if (ap->crypt) {
1218 if (ap->crypt->init) {
1219 ap->crypt_priv = ap->crypt->init(0);
1220 if (ap->crypt_priv == NULL)
1221 ap->crypt = NULL;
1222 else {
1223 u8 key[WEP_KEY_LEN];
1224 get_random_bytes(key, WEP_KEY_LEN);
1225 ap->crypt->set_key(key, WEP_KEY_LEN, NULL,
1226 ap->crypt_priv);
1227 }
1228 }
1229 }
1230
1231 if (ap->crypt == NULL) {
1232 printk(KERN_WARNING "AP could not initialize WEP: load module "
62fe7e37 1233 "ieee80211_crypt_wep.ko\n");
ff1d2767
JM		 1234 }
1235}
1236
1237
1238/* Generate challenge data for shared key authentication. IEEE 802.11 specifies
1239 * that WEP algorithm is used for generating challange. This should be unique,
1240 * but otherwise there is not really need for randomness etc. Initialize WEP
1241 * with pseudo random key and then use increasing IV to get unique challenge
1242 * streams.
1243 *
1244 * Called only as a scheduled task for pending AP frames.
1245 */
1246static char * ap_auth_make_challenge(struct ap_data *ap)
1247{
1248 char *tmpbuf;
1249 struct sk_buff *skb;
1250
1251 if (ap->crypt == NULL) {
1252 ap_crypt_init(ap);
1253 if (ap->crypt == NULL)
1254 return NULL;
1255 }
1256
5cbded58 1257 tmpbuf = kmalloc(WLAN_AUTH_CHALLENGE_LEN, GFP_ATOMIC);
ff1d2767
JM		 1258 if (tmpbuf == NULL) {
1259 PDEBUG(DEBUG_AP, "AP: kmalloc failed for challenge\n");
1260 return NULL;
1261 }
1262
1263 skb = dev_alloc_skb(WLAN_AUTH_CHALLENGE_LEN +
5bfc819b
JK		 1264 ap->crypt->extra_mpdu_prefix_len +
1265 ap->crypt->extra_mpdu_postfix_len);
ff1d2767
JM		 1266 if (skb == NULL) {
1267 kfree(tmpbuf);
1268 return NULL;
1269 }
1270
5bfc819b 1271 skb_reserve(skb, ap->crypt->extra_mpdu_prefix_len);
ff1d2767
JM		 1272 memset(skb_put(skb, WLAN_AUTH_CHALLENGE_LEN), 0,
1273 WLAN_AUTH_CHALLENGE_LEN);
1274 if (ap->crypt->encrypt_mpdu(skb, 0, ap->crypt_priv)) {
1275 dev_kfree_skb(skb);
1276 kfree(tmpbuf);
1277 return NULL;
1278 }
1279
5bfc819b 1280 memcpy(tmpbuf, skb->data + ap->crypt->extra_mpdu_prefix_len,
ff1d2767
JM		 1281 WLAN_AUTH_CHALLENGE_LEN);
1282 dev_kfree_skb(skb);
1283
1284 return tmpbuf;
1285}
1286
1287
1288/* Called only as a scheduled task for pending AP frames. */
1289static void handle_authen(local_info_t *local, struct sk_buff *skb,
1290 struct hostap_80211_rx_status *rx_stats)
1291{
1292 struct net_device *dev = local->dev;
d041674d 1293 struct ieee80211_hdr_4addr *hdr = (struct ieee80211_hdr_4addr *) skb->data;
ff1d2767
JM		 1294 size_t hdrlen;
1295 struct ap_data *ap = local->ap;
1296 char body[8 + WLAN_AUTH_CHALLENGE_LEN], *challenge = NULL;
1297 int len, olen;
1298 u16 auth_alg, auth_transaction, status_code, *pos;
1299 u16 resp = WLAN_STATUS_SUCCESS, fc;
1300 struct sta_info *sta = NULL;
62fe7e37 1301 struct ieee80211_crypt_data *crypt;
ff1d2767
JM		 1302 char *txt = "";
1303
1304 len = skb->len - IEEE80211_MGMT_HDR_LEN;
1305
c0f72ca8 1306 fc = le16_to_cpu(hdr->frame_ctl);
ff1d2767
JM		 1307 hdrlen = hostap_80211_get_hdrlen(fc);
1308
1309 if (len < 6) {
1310 PDEBUG(DEBUG_AP, "%s: handle_authen - too short payload "
1311 "(len=%d) from " MACSTR "\n", dev->name, len,
1312 MAC2STR(hdr->addr2));
1313 return;
1314 }
1315
1316 spin_lock_bh(&local->ap->sta_table_lock);
1317 sta = ap_get_sta(local->ap, hdr->addr2);
1318 if (sta)
1319 atomic_inc(&sta->users);
1320 spin_unlock_bh(&local->ap->sta_table_lock);
1321
1322 if (sta && sta->crypt)
1323 crypt = sta->crypt;
1324 else {
1325 int idx = 0;
1326 if (skb->len >= hdrlen + 3)
1327 idx = skb->data[hdrlen + 3] >> 6;
1328 crypt = local->crypt[idx];
1329 }
1330
1331 pos = (u16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
1332 auth_alg = __le16_to_cpu(*pos);
1333 pos++;
1334 auth_transaction = __le16_to_cpu(*pos);
1335 pos++;
1336 status_code = __le16_to_cpu(*pos);
1337 pos++;
1338
1339 if (memcmp(dev->dev_addr, hdr->addr2, ETH_ALEN) == 0 ||
1340 ap_control_mac_deny(&ap->mac_restrictions, hdr->addr2)) {
1341 txt = "authentication denied";
1342 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1343 goto fail;
1344 }
1345
1346 if (((local->auth_algs & PRISM2_AUTH_OPEN) &&
1347 auth_alg == WLAN_AUTH_OPEN) ||
1348 ((local->auth_algs & PRISM2_AUTH_SHARED_KEY) &&
1349 crypt && auth_alg == WLAN_AUTH_SHARED_KEY)) {
1350 } else {
1351 txt = "unsupported algorithm";
1352 resp = WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG;
1353 goto fail;
1354 }
1355
1356 if (len >= 8) {
1357 u8 *u = (u8 *) pos;
1358 if (*u == WLAN_EID_CHALLENGE) {
1359 if (*(u + 1) != WLAN_AUTH_CHALLENGE_LEN) {
1360 txt = "invalid challenge len";
1361 resp = WLAN_STATUS_CHALLENGE_FAIL;
1362 goto fail;
1363 }
1364 if (len - 8 < WLAN_AUTH_CHALLENGE_LEN) {
1365 txt = "challenge underflow";
1366 resp = WLAN_STATUS_CHALLENGE_FAIL;
1367 goto fail;
1368 }
1369 challenge = (char *) (u + 2);
1370 }
1371 }
1372
1373 if (sta && sta->ap) {
1374 if (time_after(jiffies, sta->u.ap.last_beacon +
1375 (10 * sta->listen_interval * HZ) / 1024)) {
1376 PDEBUG(DEBUG_AP, "%s: no beacons received for a while,"
1377 " assuming AP " MACSTR " is now STA\n",
1378 dev->name, MAC2STR(sta->addr));
1379 sta->ap = 0;
1380 sta->flags = 0;
1381 sta->u.sta.challenge = NULL;
1382 } else {
1383 txt = "AP trying to authenticate?";
1384 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1385 goto fail;
1386 }
1387 }
1388
1389 if ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 1) ||
1390 (auth_alg == WLAN_AUTH_SHARED_KEY &&
1391 (auth_transaction == 1 ||
1392 (auth_transaction == 3 && sta != NULL &&
1393 sta->u.sta.challenge != NULL)))) {
1394 } else {
1395 txt = "unknown authentication transaction number";
1396 resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION;
1397 goto fail;
1398 }
1399
1400 if (sta == NULL) {
1401 txt = "new STA";
1402
1403 if (local->ap->num_sta >= MAX_STA_COUNT) {
1404 /* FIX: might try to remove some old STAs first? */
1405 txt = "no more room for new STAs";
1406 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1407 goto fail;
1408 }
1409
1410 sta = ap_add_sta(local->ap, hdr->addr2);
1411 if (sta == NULL) {
1412 txt = "ap_add_sta failed";
1413 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1414 goto fail;
1415 }
1416 }
1417
1418 switch (auth_alg) {
1419 case WLAN_AUTH_OPEN:
1420 txt = "authOK";
1421 /* IEEE 802.11 standard is not completely clear about
1422 * whether STA is considered authenticated after
1423 * authentication OK frame has been send or after it
1424 * has been ACKed. In order to reduce interoperability
1425 * issues, mark the STA authenticated before ACK. */
1426 sta->flags |= WLAN_STA_AUTH;
1427 break;
1428
1429 case WLAN_AUTH_SHARED_KEY:
1430 if (auth_transaction == 1) {
1431 if (sta->u.sta.challenge == NULL) {
1432 sta->u.sta.challenge =
1433 ap_auth_make_challenge(local->ap);
1434 if (sta->u.sta.challenge == NULL) {
1435 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1436 goto fail;
1437 }
1438 }
1439 } else {
1440 if (sta->u.sta.challenge == NULL ||
1441 challenge == NULL ||
1442 memcmp(sta->u.sta.challenge, challenge,
1443 WLAN_AUTH_CHALLENGE_LEN) != 0 ||
831a179f 1444 !(fc & IEEE80211_FCTL_PROTECTED)) {
ff1d2767
JM		 1445 txt = "challenge response incorrect";
1446 resp = WLAN_STATUS_CHALLENGE_FAIL;
1447 goto fail;
1448 }
1449
1450 txt = "challenge OK - authOK";
1451 /* IEEE 802.11 standard is not completely clear about
1452 * whether STA is considered authenticated after
1453 * authentication OK frame has been send or after it
1454 * has been ACKed. In order to reduce interoperability
1455 * issues, mark the STA authenticated before ACK. */
1456 sta->flags |= WLAN_STA_AUTH;
1457 kfree(sta->u.sta.challenge);
1458 sta->u.sta.challenge = NULL;
1459 }
1460 break;
1461 }
1462
1463 fail:
1464 pos = (u16 *) body;
1465 *pos = cpu_to_le16(auth_alg);
1466 pos++;
1467 *pos = cpu_to_le16(auth_transaction + 1);
1468 pos++;
1469 *pos = cpu_to_le16(resp); /* status_code */
1470 pos++;
1471 olen = 6;
1472
1473 if (resp == WLAN_STATUS_SUCCESS && sta != NULL &&
1474 sta->u.sta.challenge != NULL &&
1475 auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 1) {
1476 u8 *tmp = (u8 *) pos;
1477 *tmp++ = WLAN_EID_CHALLENGE;
1478 *tmp++ = WLAN_AUTH_CHALLENGE_LEN;
1479 pos++;
1480 memcpy(pos, sta->u.sta.challenge, WLAN_AUTH_CHALLENGE_LEN);
1481 olen += 2 + WLAN_AUTH_CHALLENGE_LEN;
1482 }
1483
4339d328 1484 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_AUTH,
ff1d2767
JM		 1485 body, olen, hdr->addr2, ap->tx_callback_auth);
1486
1487 if (sta) {
1488 sta->last_rx = jiffies;
1489 atomic_dec(&sta->users);
1490 }
1491
1492 if (resp) {
1493 PDEBUG(DEBUG_AP, "%s: " MACSTR " auth (alg=%d trans#=%d "
1494 "stat=%d len=%d fc=%04x) ==> %d (%s)\n",
1495 dev->name, MAC2STR(hdr->addr2), auth_alg,
1496 auth_transaction, status_code, len, fc, resp, txt);
1497 }
1498}
1499
1500
1501/* Called only as a scheduled task for pending AP frames. */
1502static void handle_assoc(local_info_t *local, struct sk_buff *skb,
1503 struct hostap_80211_rx_status *rx_stats, int reassoc)
1504{
1505 struct net_device *dev = local->dev;
d041674d 1506 struct ieee80211_hdr_4addr *hdr = (struct ieee80211_hdr_4addr *) skb->data;
ff1d2767
JM		 1507 char body[12], *p, *lpos;
1508 int len, left;
1509 u16 *pos;
1510 u16 resp = WLAN_STATUS_SUCCESS;
1511 struct sta_info *sta = NULL;
1512 int send_deauth = 0;
1513 char *txt = "";
1514 u8 prev_ap[ETH_ALEN];
1515
1516 left = len = skb->len - IEEE80211_MGMT_HDR_LEN;
1517
1518 if (len < (reassoc ? 10 : 4)) {
1519 PDEBUG(DEBUG_AP, "%s: handle_assoc - too short payload "
1520 "(len=%d, reassoc=%d) from " MACSTR "\n",
1521 dev->name, len, reassoc, MAC2STR(hdr->addr2));
1522 return;
1523 }
1524
1525 spin_lock_bh(&local->ap->sta_table_lock);
1526 sta = ap_get_sta(local->ap, hdr->addr2);
1527 if (sta == NULL || (sta->flags & WLAN_STA_AUTH) == 0) {
1528 spin_unlock_bh(&local->ap->sta_table_lock);
1529 txt = "trying to associate before authentication";
1530 send_deauth = 1;
1531 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1532 sta = NULL; /* do not decrement sta->users */
1533 goto fail;
1534 }
1535 atomic_inc(&sta->users);
1536 spin_unlock_bh(&local->ap->sta_table_lock);
1537
1538 pos = (u16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
1539 sta->capability = __le16_to_cpu(*pos);
1540 pos++; left -= 2;
1541 sta->listen_interval = __le16_to_cpu(*pos);
1542 pos++; left -= 2;
1543
1544 if (reassoc) {
1545 memcpy(prev_ap, pos, ETH_ALEN);
1546 pos++; pos++; pos++; left -= 6;
1547 } else
1548 memset(prev_ap, 0, ETH_ALEN);
1549
1550 if (left >= 2) {
1551 unsigned int ileft;
1552 unsigned char *u = (unsigned char *) pos;
1553
1554 if (*u == WLAN_EID_SSID) {
1555 u++; left--;
1556 ileft = *u;
1557 u++; left--;
1558
1559 if (ileft > left || ileft > MAX_SSID_LEN) {
1560 txt = "SSID overflow";
1561 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1562 goto fail;
1563 }
1564
1565 if (ileft != strlen(local->essid) ||
1566 memcmp(local->essid, u, ileft) != 0) {
1567 txt = "not our SSID";
1568 resp = WLAN_STATUS_ASSOC_DENIED_UNSPEC;
1569 goto fail;
1570 }
1571
1572 u += ileft;
1573 left -= ileft;
1574 }
1575
1576 if (left >= 2 && *u == WLAN_EID_SUPP_RATES) {
1577 u++; left--;
1578 ileft = *u;
1579 u++; left--;
74fae82c 1580
ff1d2767
JM		 1581 if (ileft > left || ileft == 0 ||
1582 ileft > WLAN_SUPP_RATES_MAX) {
1583 txt = "SUPP_RATES len error";
1584 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1585 goto fail;
1586 }
1587
1588 memset(sta->supported_rates, 0,
1589 sizeof(sta->supported_rates));
1590 memcpy(sta->supported_rates, u, ileft);
1591 prism2_check_tx_rates(sta);
1592
1593 u += ileft;
1594 left -= ileft;
1595 }
1596
1597 if (left > 0) {
1598 PDEBUG(DEBUG_AP, "%s: assoc from " MACSTR " with extra"
1599 " data (%d bytes) [",
1600 dev->name, MAC2STR(hdr->addr2), left);
1601 while (left > 0) {
1602 PDEBUG2(DEBUG_AP, "<%02x>", *u);
1603 u++; left--;
1604 }
1605 PDEBUG2(DEBUG_AP, "]\n");
1606 }
1607 } else {
1608 txt = "frame underflow";
1609 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1610 goto fail;
1611 }
1612
1613 /* get a unique AID */
1614 if (sta->aid > 0)
1615 txt = "OK, old AID";
1616 else {
1617 spin_lock_bh(&local->ap->sta_table_lock);
1618 for (sta->aid = 1; sta->aid <= MAX_AID_TABLE_SIZE; sta->aid++)
1619 if (local->ap->sta_aid[sta->aid - 1] == NULL)
1620 break;
1621 if (sta->aid > MAX_AID_TABLE_SIZE) {
1622 sta->aid = 0;
1623 spin_unlock_bh(&local->ap->sta_table_lock);
1624 resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
1625 txt = "no room for more AIDs";
1626 } else {
1627 local->ap->sta_aid[sta->aid - 1] = sta;
1628 spin_unlock_bh(&local->ap->sta_table_lock);
1629 txt = "OK, new AID";
1630 }
1631 }
1632
1633 fail:
1634 pos = (u16 *) body;
1635
1636 if (send_deauth) {
1637 *pos = __constant_cpu_to_le16(
1638 WLAN_REASON_STA_REQ_ASSOC_WITHOUT_AUTH);
1639 pos++;
1640 } else {
1641 /* FIX: CF-Pollable and CF-PollReq should be set to match the
1642 * values in beacons/probe responses */
1643 /* FIX: how about privacy and WEP? */
1644 /* capability */
1645 *pos = __constant_cpu_to_le16(WLAN_CAPABILITY_ESS);
1646 pos++;
1647
1648 /* status_code */
1649 *pos = __cpu_to_le16(resp);
1650 pos++;
1651
1652 *pos = __cpu_to_le16((sta && sta->aid > 0 ? sta->aid : 0) |
1653 BIT(14) | BIT(15)); /* AID */
1654 pos++;
1655
1656 /* Supported rates (Information element) */
1657 p = (char *) pos;
1658 *p++ = WLAN_EID_SUPP_RATES;
1659 lpos = p;
1660 *p++ = 0; /* len */
1661 if (local->tx_rate_control & WLAN_RATE_1M) {
1662 *p++ = local->basic_rates & WLAN_RATE_1M ? 0x82 : 0x02;
1663 (*lpos)++;
1664 }
1665 if (local->tx_rate_control & WLAN_RATE_2M) {
1666 *p++ = local->basic_rates & WLAN_RATE_2M ? 0x84 : 0x04;
1667 (*lpos)++;
1668 }
1669 if (local->tx_rate_control & WLAN_RATE_5M5) {
1670 *p++ = local->basic_rates & WLAN_RATE_5M5 ?
1671 0x8b : 0x0b;
1672 (*lpos)++;
1673 }
1674 if (local->tx_rate_control & WLAN_RATE_11M) {
1675 *p++ = local->basic_rates & WLAN_RATE_11M ?
1676 0x96 : 0x16;
1677 (*lpos)++;
1678 }
1679 pos = (u16 *) p;
1680 }
1681
4339d328
JM		 1682 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT |
1683 (send_deauth ? IEEE80211_STYPE_DEAUTH :
1684 (reassoc ? IEEE80211_STYPE_REASSOC_RESP :
1685 IEEE80211_STYPE_ASSOC_RESP)),
ff1d2767
JM		 1686 body, (u8 *) pos - (u8 *) body,
1687 hdr->addr2,
1688 send_deauth ? 0 : local->ap->tx_callback_assoc);
1689
1690 if (sta) {
1691 if (resp == WLAN_STATUS_SUCCESS) {
1692 sta->last_rx = jiffies;
1693 /* STA will be marked associated from TX callback, if
1694 * AssocResp is ACKed */
1695 }
1696 atomic_dec(&sta->users);
1697 }
1698
1699#if 0
1700 PDEBUG(DEBUG_AP, "%s: " MACSTR " %sassoc (len=%d prev_ap=" MACSTR
1701 ") => %d(%d) (%s)\n",
1702 dev->name, MAC2STR(hdr->addr2), reassoc ? "re" : "", len,
1703 MAC2STR(prev_ap), resp, send_deauth, txt);
1704#endif
1705}
1706
1707
1708/* Called only as a scheduled task for pending AP frames. */
1709static void handle_deauth(local_info_t *local, struct sk_buff *skb,
1710 struct hostap_80211_rx_status *rx_stats)
1711{
1712 struct net_device *dev = local->dev;
d041674d 1713 struct ieee80211_hdr_4addr *hdr = (struct ieee80211_hdr_4addr *) skb->data;
ff1d2767
JM		 1714 char *body = (char *) (skb->data + IEEE80211_MGMT_HDR_LEN);
1715 int len;
1716 u16 reason_code, *pos;
1717 struct sta_info *sta = NULL;
1718
1719 len = skb->len - IEEE80211_MGMT_HDR_LEN;
1720
1721 if (len < 2) {
1722 printk("handle_deauth - too short payload (len=%d)\n", len);
1723 return;
1724 }
1725
1726 pos = (u16 *) body;
1727 reason_code = __le16_to_cpu(*pos);
1728
1729 PDEBUG(DEBUG_AP, "%s: deauthentication: " MACSTR " len=%d, "
1730 "reason_code=%d\n", dev->name, MAC2STR(hdr->addr2), len,
1731 reason_code);
1732
1733 spin_lock_bh(&local->ap->sta_table_lock);
1734 sta = ap_get_sta(local->ap, hdr->addr2);
1735 if (sta != NULL) {
1736 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap)
1737 hostap_event_expired_sta(local->dev, sta);
1738 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
1739 }
1740 spin_unlock_bh(&local->ap->sta_table_lock);
1741 if (sta == NULL) {
1742 printk("%s: deauthentication from " MACSTR ", "
1743 "reason_code=%d, but STA not authenticated\n", dev->name,
1744 MAC2STR(hdr->addr2), reason_code);
1745 }
1746}
1747
1748
1749/* Called only as a scheduled task for pending AP frames. */
1750static void handle_disassoc(local_info_t *local, struct sk_buff *skb,
1751 struct hostap_80211_rx_status *rx_stats)
1752{
1753 struct net_device *dev = local->dev;
d041674d 1754 struct ieee80211_hdr_4addr *hdr = (struct ieee80211_hdr_4addr *) skb->data;
ff1d2767
JM		 1755 char *body = skb->data + IEEE80211_MGMT_HDR_LEN;
1756 int len;
1757 u16 reason_code, *pos;
1758 struct sta_info *sta = NULL;
1759
1760 len = skb->len - IEEE80211_MGMT_HDR_LEN;
1761
1762 if (len < 2) {
1763 printk("handle_disassoc - too short payload (len=%d)\n", len);
1764 return;
1765 }
1766
1767 pos = (u16 *) body;
1768 reason_code = __le16_to_cpu(*pos);
1769
1770 PDEBUG(DEBUG_AP, "%s: disassociation: " MACSTR " len=%d, "
1771 "reason_code=%d\n", dev->name, MAC2STR(hdr->addr2), len,
1772 reason_code);
1773
1774 spin_lock_bh(&local->ap->sta_table_lock);
1775 sta = ap_get_sta(local->ap, hdr->addr2);
1776 if (sta != NULL) {
1777 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap)
1778 hostap_event_expired_sta(local->dev, sta);
1779 sta->flags &= ~WLAN_STA_ASSOC;
1780 }
1781 spin_unlock_bh(&local->ap->sta_table_lock);
1782 if (sta == NULL) {
1783 printk("%s: disassociation from " MACSTR ", "
1784 "reason_code=%d, but STA not authenticated\n",
1785 dev->name, MAC2STR(hdr->addr2), reason_code);
1786 }
1787}
1788
1789
1790/* Called only as a scheduled task for pending AP frames. */
1791static void ap_handle_data_nullfunc(local_info_t *local,
d041674d 1792 struct ieee80211_hdr_4addr *hdr)
ff1d2767
JM		 1793{
1794 struct net_device *dev = local->dev;
1795
1796 /* some STA f/w's seem to require control::ACK frame for
1797 * data::nullfunc, but at least Prism2 station f/w version 0.8.0 does
1798 * not send this..
1799 * send control::ACK for the data::nullfunc */
1800
1801 printk(KERN_DEBUG "Sending control::ACK for data::nullfunc\n");
4339d328 1802 prism2_send_mgmt(dev, IEEE80211_FTYPE_CTL | IEEE80211_STYPE_ACK,
ff1d2767
JM		 1803 NULL, 0, hdr->addr2, 0);
1804}
1805
1806
1807/* Called only as a scheduled task for pending AP frames. */
1808static void ap_handle_dropped_data(local_info_t *local,
d041674d 1809 struct ieee80211_hdr_4addr *hdr)
ff1d2767
JM		 1810{
1811 struct net_device *dev = local->dev;
1812 struct sta_info *sta;
1813 u16 reason;
1814
1815 spin_lock_bh(&local->ap->sta_table_lock);
1816 sta = ap_get_sta(local->ap, hdr->addr2);
1817 if (sta)
1818 atomic_inc(&sta->users);
1819 spin_unlock_bh(&local->ap->sta_table_lock);
1820
1821 if (sta != NULL && (sta->flags & WLAN_STA_ASSOC)) {
1822 PDEBUG(DEBUG_AP, "ap_handle_dropped_data: STA is now okay?\n");
1823 atomic_dec(&sta->users);
1824 return;
1825 }
1826
1827 reason = __constant_cpu_to_le16(
1828 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
4339d328 1829 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT |
ff1d2767 1830 ((sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) ?
4339d328 1831 IEEE80211_STYPE_DEAUTH : IEEE80211_STYPE_DISASSOC),
ff1d2767
JM		 1832 (char *) &reason, sizeof(reason), hdr->addr2, 0);
1833
1834 if (sta)
1835 atomic_dec(&sta->users);
1836}
1837
1838#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1839
1840
1841/* Called only as a scheduled task for pending AP frames. */
1842static void pspoll_send_buffered(local_info_t *local, struct sta_info *sta,
1843 struct sk_buff *skb)
1844{
5bee720f
JM		 1845 struct hostap_skb_tx_data *meta;
1846
ff1d2767
JM		 1847 if (!(sta->flags & WLAN_STA_PS)) {
1848 /* Station has moved to non-PS mode, so send all buffered
1849 * frames using normal device queue. */
1850 dev_queue_xmit(skb);
1851 return;
1852 }
1853
1854 /* add a flag for hostap_handle_sta_tx() to know that this skb should
1855 * be passed through even though STA is using PS */
5bee720f
JM		 1856 meta = (struct hostap_skb_tx_data *) skb->cb;
1857 meta->flags |= HOSTAP_TX_FLAGS_BUFFERED_FRAME;
ff1d2767
JM		 1858 if (!skb_queue_empty(&sta->tx_buf)) {
1859 /* indicate to STA that more frames follow */
5bee720f 1860 meta->flags |= HOSTAP_TX_FLAGS_ADD_MOREDATA;
ff1d2767
JM		 1861 }
1862 dev_queue_xmit(skb);
1863}
1864
1865
1866/* Called only as a scheduled task for pending AP frames. */
1867static void handle_pspoll(local_info_t *local,
d041674d 1868 struct ieee80211_hdr_4addr *hdr,
ff1d2767
JM		 1869 struct hostap_80211_rx_status *rx_stats)
1870{
1871 struct net_device *dev = local->dev;
1872 struct sta_info *sta;
1873 u16 aid;
1874 struct sk_buff *skb;
1875
1876 PDEBUG(DEBUG_PS2, "handle_pspoll: BSSID=" MACSTR ", TA=" MACSTR
1877 " PWRMGT=%d\n",
1878 MAC2STR(hdr->addr1), MAC2STR(hdr->addr2),
b2f4a2e3 1879 !!(le16_to_cpu(hdr->frame_ctl) & IEEE80211_FCTL_PM));
ff1d2767
JM		 1880
1881 if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN)) {
1882 PDEBUG(DEBUG_AP, "handle_pspoll - addr1(BSSID)=" MACSTR
1883 " not own MAC\n", MAC2STR(hdr->addr1));
1884 return;
1885 }
1886
1887 aid = __le16_to_cpu(hdr->duration_id);
1888 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) {
1889 PDEBUG(DEBUG_PS, " PSPOLL and AID[15:14] not set\n");
1890 return;
1891 }
1892 aid &= ~BIT(15) & ~BIT(14);
1893 if (aid == 0 || aid > MAX_AID_TABLE_SIZE) {
1894 PDEBUG(DEBUG_PS, " invalid aid=%d\n", aid);
1895 return;
1896 }
1897 PDEBUG(DEBUG_PS2, " aid=%d\n", aid);
1898
1899 spin_lock_bh(&local->ap->sta_table_lock);
1900 sta = ap_get_sta(local->ap, hdr->addr2);
1901 if (sta)
1902 atomic_inc(&sta->users);
1903 spin_unlock_bh(&local->ap->sta_table_lock);
1904
1905 if (sta == NULL) {
1906 PDEBUG(DEBUG_PS, " STA not found\n");
1907 return;
1908 }
1909 if (sta->aid != aid) {
1910 PDEBUG(DEBUG_PS, " received aid=%i does not match with "
1911 "assoc.aid=%d\n", aid, sta->aid);
1912 return;
1913 }
1914
1915 /* FIX: todo:
1916 * - add timeout for buffering (clear aid in TIM vector if buffer timed
1917 * out (expiry time must be longer than ListenInterval for
1918 * the corresponding STA; "8802-11: 11.2.1.9 AP aging function"
1919 * - what to do, if buffered, pspolled, and sent frame is not ACKed by
1920 * sta; store buffer for later use and leave TIM aid bit set? use
1921 * TX event to check whether frame was ACKed?
1922 */
1923
1924 while ((skb = skb_dequeue(&sta->tx_buf)) != NULL) {
1925 /* send buffered frame .. */
1926 PDEBUG(DEBUG_PS2, "Sending buffered frame to STA after PS POLL"
1927 " (buffer_count=%d)\n", skb_queue_len(&sta->tx_buf));
1928
1929 pspoll_send_buffered(local, sta, skb);
1930
1931 if (sta->flags & WLAN_STA_PS) {
1932 /* send only one buffered packet per PS Poll */
1933 /* FIX: should ignore further PS Polls until the
1934 * buffered packet that was just sent is acknowledged
1935 * (Tx or TxExc event) */
1936 break;
1937 }
1938 }
1939
1940 if (skb_queue_empty(&sta->tx_buf)) {
1941 /* try to clear aid from TIM */
1942 if (!(sta->flags & WLAN_STA_TIM))
1943 PDEBUG(DEBUG_PS2, "Re-unsetting TIM for aid %d\n",
1944 aid);
1945 hostap_set_tim(local, aid, 0);
1946 sta->flags &= ~WLAN_STA_TIM;
1947 }
1948
1949 atomic_dec(&sta->users);
1950}
1951
1952
1953#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1954
c4028958 1955static void handle_wds_oper_queue(struct work_struct *work)
ff1d2767 1956{
c4028958
DH		 1957 struct ap_data *ap = container_of(work, struct ap_data,
1958 wds_oper_queue);
1959 local_info_t *local = ap->local;
ff1d2767
JM		 1960 struct wds_oper_data *entry, *prev;
1961
1962 spin_lock_bh(&local->lock);
1963 entry = local->ap->wds_oper_entries;
1964 local->ap->wds_oper_entries = NULL;
1965 spin_unlock_bh(&local->lock);
1966
1967 while (entry) {
1968 PDEBUG(DEBUG_AP, "%s: %s automatic WDS connection "
1969 "to AP " MACSTR "\n",
1970 local->dev->name,
1971 entry->type == WDS_ADD ? "adding" : "removing",
1972 MAC2STR(entry->addr));
1973 if (entry->type == WDS_ADD)
1974 prism2_wds_add(local, entry->addr, 0);
1975 else if (entry->type == WDS_DEL)
1976 prism2_wds_del(local, entry->addr, 0, 1);
1977
1978 prev = entry;
1979 entry = entry->next;
1980 kfree(prev);
1981 }
1982}
1983
1984
1985/* Called only as a scheduled task for pending AP frames. */
1986static void handle_beacon(local_info_t *local, struct sk_buff *skb,
1987 struct hostap_80211_rx_status *rx_stats)
1988{
d041674d 1989 struct ieee80211_hdr_4addr *hdr = (struct ieee80211_hdr_4addr *) skb->data;
ff1d2767
JM		 1990 char *body = skb->data + IEEE80211_MGMT_HDR_LEN;
1991 int len, left;
1992 u16 *pos, beacon_int, capability;
1993 char *ssid = NULL;
1994 unsigned char *supp_rates = NULL;
1995 int ssid_len = 0, supp_rates_len = 0;
1996 struct sta_info *sta = NULL;
1997 int new_sta = 0, channel = -1;
1998
1999 len = skb->len - IEEE80211_MGMT_HDR_LEN;
2000
2001 if (len < 8 + 2 + 2) {
2002 printk(KERN_DEBUG "handle_beacon - too short payload "
2003 "(len=%d)\n", len);
2004 return;
2005 }
2006
2007 pos = (u16 *) body;
2008 left = len;
2009
2010 /* Timestamp (8 octets) */
2011 pos += 4; left -= 8;
2012 /* Beacon interval (2 octets) */
2013 beacon_int = __le16_to_cpu(*pos);
2014 pos++; left -= 2;
2015 /* Capability information (2 octets) */
2016 capability = __le16_to_cpu(*pos);
2017 pos++; left -= 2;
2018
2019 if (local->ap->ap_policy != AP_OTHER_AP_EVEN_IBSS &&
2020 capability & WLAN_CAPABILITY_IBSS)
2021 return;
2022
2023 if (left >= 2) {
2024 unsigned int ileft;
2025 unsigned char *u = (unsigned char *) pos;
2026
2027 if (*u == WLAN_EID_SSID) {
2028 u++; left--;
2029 ileft = *u;
2030 u++; left--;
2031
2032 if (ileft > left || ileft > MAX_SSID_LEN) {
2033 PDEBUG(DEBUG_AP, "SSID: overflow\n");
2034 return;
2035 }
2036
2037 if (local->ap->ap_policy == AP_OTHER_AP_SAME_SSID &&
2038 (ileft != strlen(local->essid) ||
2039 memcmp(local->essid, u, ileft) != 0)) {
2040 /* not our SSID */
2041 return;
2042 }
2043
2044 ssid = u;
2045 ssid_len = ileft;
2046
2047 u += ileft;
2048 left -= ileft;
2049 }
2050
2051 if (*u == WLAN_EID_SUPP_RATES) {
2052 u++; left--;
2053 ileft = *u;
2054 u++; left--;
74fae82c 2055
ff1d2767
JM		 2056 if (ileft > left || ileft == 0 || ileft > 8) {
2057 PDEBUG(DEBUG_AP, " - SUPP_RATES len error\n");
2058 return;
2059 }
2060
2061 supp_rates = u;
2062 supp_rates_len = ileft;
2063
2064 u += ileft;
2065 left -= ileft;
2066 }
2067
2068 if (*u == WLAN_EID_DS_PARAMS) {
2069 u++; left--;
2070 ileft = *u;
2071 u++; left--;
74fae82c 2072
ff1d2767
JM		 2073 if (ileft > left || ileft != 1) {
2074 PDEBUG(DEBUG_AP, " - DS_PARAMS len error\n");
2075 return;
2076 }
2077
2078 channel = *u;
2079
2080 u += ileft;
2081 left -= ileft;
2082 }
2083 }
2084
2085 spin_lock_bh(&local->ap->sta_table_lock);
2086 sta = ap_get_sta(local->ap, hdr->addr2);
2087 if (sta != NULL)
2088 atomic_inc(&sta->users);
2089 spin_unlock_bh(&local->ap->sta_table_lock);
2090
2091 if (sta == NULL) {
2092 /* add new AP */
2093 new_sta = 1;
2094 sta = ap_add_sta(local->ap, hdr->addr2);
2095 if (sta == NULL) {
2096 printk(KERN_INFO "prism2: kmalloc failed for AP "
2097 "data structure\n");
2098 return;
2099 }
2100 hostap_event_new_sta(local->dev, sta);
2101
2102 /* mark APs authentication and associated for pseudo ad-hoc
2103 * style communication */
2104 sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
2105
2106 if (local->ap->autom_ap_wds) {
2107 hostap_wds_link_oper(local, sta->addr, WDS_ADD);
2108 }
2109 }
2110
2111 sta->ap = 1;
2112 if (ssid) {
2113 sta->u.ap.ssid_len = ssid_len;
2114 memcpy(sta->u.ap.ssid, ssid, ssid_len);
2115 sta->u.ap.ssid[ssid_len] = '\0';
2116 } else {
2117 sta->u.ap.ssid_len = 0;
2118 sta->u.ap.ssid[0] = '\0';
2119 }
2120 sta->u.ap.channel = channel;
2121 sta->rx_packets++;
2122 sta->rx_bytes += len;
2123 sta->u.ap.last_beacon = sta->last_rx = jiffies;
2124 sta->capability = capability;
2125 sta->listen_interval = beacon_int;
2126
2127 atomic_dec(&sta->users);
2128
2129 if (new_sta) {
2130 memset(sta->supported_rates, 0, sizeof(sta->supported_rates));
2131 memcpy(sta->supported_rates, supp_rates, supp_rates_len);
2132 prism2_check_tx_rates(sta);
2133 }
2134}
2135
2136#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2137
2138
2139/* Called only as a tasklet. */
2140static void handle_ap_item(local_info_t *local, struct sk_buff *skb,
2141 struct hostap_80211_rx_status *rx_stats)
2142{
2143#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2144 struct net_device *dev = local->dev;
2145#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2146 u16 fc, type, stype;
d041674d 2147 struct ieee80211_hdr_4addr *hdr;
ff1d2767
JM		 2148
2149 /* FIX: should give skb->len to handler functions and check that the
2150 * buffer is long enough */
d041674d 2151 hdr = (struct ieee80211_hdr_4addr *) skb->data;
c0f72ca8 2152 fc = le16_to_cpu(hdr->frame_ctl);
4339d328
JM		 2153 type = WLAN_FC_GET_TYPE(fc);
2154 stype = WLAN_FC_GET_STYPE(fc);
ff1d2767
JM		 2155
2156#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
4339d328 2157 if (!local->hostapd && type == IEEE80211_FTYPE_DATA) {
ff1d2767
JM		 2158 PDEBUG(DEBUG_AP, "handle_ap_item - data frame\n");
2159
b2f4a2e3
JM		 2160 if (!(fc & IEEE80211_FCTL_TODS) ||
2161 (fc & IEEE80211_FCTL_FROMDS)) {
4339d328 2162 if (stype == IEEE80211_STYPE_NULLFUNC) {
ff1d2767
JM		 2163 /* no ToDS nullfunc seems to be used to check
2164 * AP association; so send reject message to
2165 * speed up re-association */
2166 ap_handle_dropped_data(local, hdr);
2167 goto done;
2168 }
2169 PDEBUG(DEBUG_AP, " not ToDS frame (fc=0x%04x)\n",
2170 fc);
2171 goto done;
2172 }
2173
2174 if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN)) {
2175 PDEBUG(DEBUG_AP, "handle_ap_item - addr1(BSSID)="
2176 MACSTR " not own MAC\n",
2177 MAC2STR(hdr->addr1));
2178 goto done;
2179 }
2180
4339d328
JM		 2181 if (local->ap->nullfunc_ack &&
2182 stype == IEEE80211_STYPE_NULLFUNC)
ff1d2767
JM		 2183 ap_handle_data_nullfunc(local, hdr);
2184 else
2185 ap_handle_dropped_data(local, hdr);
2186 goto done;
2187 }
2188
4339d328 2189 if (type == IEEE80211_FTYPE_MGMT && stype == IEEE80211_STYPE_BEACON) {
ff1d2767
JM		 2190 handle_beacon(local, skb, rx_stats);
2191 goto done;
2192 }
2193#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2194
4339d328 2195 if (type == IEEE80211_FTYPE_CTL && stype == IEEE80211_STYPE_PSPOLL) {
ff1d2767
JM		 2196 handle_pspoll(local, hdr, rx_stats);
2197 goto done;
2198 }
2199
2200 if (local->hostapd) {
2201 PDEBUG(DEBUG_AP, "Unknown frame in AP queue: type=0x%02x "
2202 "subtype=0x%02x\n", type, stype);
2203 goto done;
2204 }
2205
2206#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
4339d328 2207 if (type != IEEE80211_FTYPE_MGMT) {
ff1d2767
JM		 2208 PDEBUG(DEBUG_AP, "handle_ap_item - not a management frame?\n");
2209 goto done;
2210 }
2211
2212 if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN)) {
2213 PDEBUG(DEBUG_AP, "handle_ap_item - addr1(DA)=" MACSTR
2214 " not own MAC\n", MAC2STR(hdr->addr1));
2215 goto done;
2216 }
2217
2218 if (memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN)) {
2219 PDEBUG(DEBUG_AP, "handle_ap_item - addr3(BSSID)=" MACSTR
2220 " not own MAC\n", MAC2STR(hdr->addr3));
2221 goto done;
2222 }
2223
2224 switch (stype) {
4339d328 2225 case IEEE80211_STYPE_ASSOC_REQ:
ff1d2767
JM		 2226 handle_assoc(local, skb, rx_stats, 0);
2227 break;
4339d328 2228 case IEEE80211_STYPE_ASSOC_RESP:
ff1d2767
JM		 2229 PDEBUG(DEBUG_AP, "==> ASSOC RESP (ignored)\n");
2230 break;
4339d328 2231 case IEEE80211_STYPE_REASSOC_REQ:
ff1d2767
JM		 2232 handle_assoc(local, skb, rx_stats, 1);
2233 break;
4339d328 2234 case IEEE80211_STYPE_REASSOC_RESP:
ff1d2767
JM		 2235 PDEBUG(DEBUG_AP, "==> REASSOC RESP (ignored)\n");
2236 break;
4339d328 2237 case IEEE80211_STYPE_ATIM:
ff1d2767
JM		 2238 PDEBUG(DEBUG_AP, "==> ATIM (ignored)\n");
2239 break;
4339d328 2240 case IEEE80211_STYPE_DISASSOC:
ff1d2767
JM		 2241 handle_disassoc(local, skb, rx_stats);
2242 break;
4339d328 2243 case IEEE80211_STYPE_AUTH:
ff1d2767
JM		 2244 handle_authen(local, skb, rx_stats);
2245 break;
4339d328 2246 case IEEE80211_STYPE_DEAUTH:
ff1d2767
JM		 2247 handle_deauth(local, skb, rx_stats);
2248 break;
2249 default:
4339d328
JM		 2250 PDEBUG(DEBUG_AP, "Unknown mgmt frame subtype 0x%02x\n",
2251 stype >> 4);
ff1d2767
JM		 2252 break;
2253 }
2254#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2255
2256 done:
2257 dev_kfree_skb(skb);
2258}
2259
2260
2261/* Called only as a tasklet (software IRQ) */
2262void hostap_rx(struct net_device *dev, struct sk_buff *skb,
2263 struct hostap_80211_rx_status *rx_stats)
2264{
2265 struct hostap_interface *iface;
2266 local_info_t *local;
2267 u16 fc;
d041674d 2268 struct ieee80211_hdr_4addr *hdr;
ff1d2767
JM		 2269
2270 iface = netdev_priv(dev);
2271 local = iface->local;
2272
2273 if (skb->len < 16)
2274 goto drop;
2275
2276 local->stats.rx_packets++;
2277
d041674d 2278 hdr = (struct ieee80211_hdr_4addr *) skb->data;
c0f72ca8 2279 fc = le16_to_cpu(hdr->frame_ctl);
ff1d2767
JM		 2280
2281 if (local->ap->ap_policy == AP_OTHER_AP_SKIP_ALL &&
4339d328
JM		 2282 WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_MGMT &&
2283 WLAN_FC_GET_STYPE(fc) == IEEE80211_STYPE_BEACON)
ff1d2767
JM		 2284 goto drop;
2285
2286 skb->protocol = __constant_htons(ETH_P_HOSTAP);
2287 handle_ap_item(local, skb, rx_stats);
2288 return;
2289
2290 drop:
2291 dev_kfree_skb(skb);
2292}
2293
2294
2295/* Called only as a tasklet (software IRQ) */
2296static void schedule_packet_send(local_info_t *local, struct sta_info *sta)
2297{
2298 struct sk_buff *skb;
d041674d 2299 struct ieee80211_hdr_4addr *hdr;
ff1d2767
JM		 2300 struct hostap_80211_rx_status rx_stats;
2301
2302 if (skb_queue_empty(&sta->tx_buf))
2303 return;
2304
2305 skb = dev_alloc_skb(16);
2306 if (skb == NULL) {
2307 printk(KERN_DEBUG "%s: schedule_packet_send: skb alloc "
2308 "failed\n", local->dev->name);
2309 return;
2310 }
2311
d041674d 2312 hdr = (struct ieee80211_hdr_4addr *) skb_put(skb, 16);
ff1d2767
JM		 2313
2314 /* Generate a fake pspoll frame to start packet delivery */
c0f72ca8 2315 hdr->frame_ctl = __constant_cpu_to_le16(
4339d328 2316 IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL);
ff1d2767
JM		 2317 memcpy(hdr->addr1, local->dev->dev_addr, ETH_ALEN);
2318 memcpy(hdr->addr2, sta->addr, ETH_ALEN);
2319 hdr->duration_id = cpu_to_le16(sta->aid | BIT(15) | BIT(14));
2320
2321 PDEBUG(DEBUG_PS2, "%s: Scheduling buffered packet delivery for "
2322 "STA " MACSTR "\n", local->dev->name, MAC2STR(sta->addr));
2323
2324 skb->dev = local->dev;
2325
2326 memset(&rx_stats, 0, sizeof(rx_stats));
2327 hostap_rx(local->dev, skb, &rx_stats);
2328}
2329
2330
5fad5a2e
AB		 2331int prism2_ap_get_sta_qual(local_info_t *local, struct sockaddr addr[],
2332 struct iw_quality qual[], int buf_size,
2333 int aplist)
ff1d2767
JM		 2334{
2335 struct ap_data *ap = local->ap;
2336 struct list_head *ptr;
2337 int count = 0;
2338
2339 spin_lock_bh(&ap->sta_table_lock);
2340
2341 for (ptr = ap->sta_list.next; ptr != NULL && ptr != &ap->sta_list;
2342 ptr = ptr->next) {
2343 struct sta_info *sta = (struct sta_info *) ptr;
2344
2345 if (aplist && !sta->ap)
2346 continue;
2347 addr[count].sa_family = ARPHRD_ETHER;
2348 memcpy(addr[count].sa_data, sta->addr, ETH_ALEN);
2349 if (sta->last_rx_silence == 0)
2350 qual[count].qual = sta->last_rx_signal < 27 ?
2351 0 : (sta->last_rx_signal - 27) * 92 / 127;
2352 else
2353 qual[count].qual = sta->last_rx_signal -
2354 sta->last_rx_silence - 35;
2355 qual[count].level = HFA384X_LEVEL_TO_dBm(sta->last_rx_signal);
2356 qual[count].noise = HFA384X_LEVEL_TO_dBm(sta->last_rx_silence);
2357 qual[count].updated = sta->last_rx_updated;
2358
c28df16e 2359 sta->last_rx_updated = IW_QUAL_DBM;
ff1d2767
JM		 2360
2361 count++;
2362 if (count >= buf_size)
2363 break;
2364 }
2365 spin_unlock_bh(&ap->sta_table_lock);
2366
2367 return count;
2368}
2369
2370
2371/* Translate our list of Access Points & Stations to a card independant
2372 * format that the Wireless Tools will understand - Jean II */
5fad5a2e 2373int prism2_ap_translate_scan(struct net_device *dev, char *buffer)
ff1d2767
JM		 2374{
2375 struct hostap_interface *iface;
2376 local_info_t *local;
2377 struct ap_data *ap;
2378 struct list_head *ptr;
2379 struct iw_event iwe;
2380 char *current_ev = buffer;
2381 char *end_buf = buffer + IW_SCAN_MAX_DATA;
2382#if !defined(PRISM2_NO_KERNEL_IEEE80211_MGMT)
2383 char buf[64];
2384#endif
2385
2386 iface = netdev_priv(dev);
2387 local = iface->local;
2388 ap = local->ap;
2389
2390 spin_lock_bh(&ap->sta_table_lock);
2391
2392 for (ptr = ap->sta_list.next; ptr != NULL && ptr != &ap->sta_list;
2393 ptr = ptr->next) {
2394 struct sta_info *sta = (struct sta_info *) ptr;
2395
2396 /* First entry *MUST* be the AP MAC address */
2397 memset(&iwe, 0, sizeof(iwe));
2398 iwe.cmd = SIOCGIWAP;
2399 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
2400 memcpy(iwe.u.ap_addr.sa_data, sta->addr, ETH_ALEN);
2401 iwe.len = IW_EV_ADDR_LEN;
2402 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2403 IW_EV_ADDR_LEN);
2404
2405 /* Use the mode to indicate if it's a station or
2406 * an Access Point */
2407 memset(&iwe, 0, sizeof(iwe));
2408 iwe.cmd = SIOCGIWMODE;
2409 if (sta->ap)
2410 iwe.u.mode = IW_MODE_MASTER;
2411 else
2412 iwe.u.mode = IW_MODE_INFRA;
2413 iwe.len = IW_EV_UINT_LEN;
2414 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2415 IW_EV_UINT_LEN);
2416
2417 /* Some quality */
2418 memset(&iwe, 0, sizeof(iwe));
2419 iwe.cmd = IWEVQUAL;
2420 if (sta->last_rx_silence == 0)
2421 iwe.u.qual.qual = sta->last_rx_signal < 27 ?
2422 0 : (sta->last_rx_signal - 27) * 92 / 127;
2423 else
2424 iwe.u.qual.qual = sta->last_rx_signal -
2425 sta->last_rx_silence - 35;
2426 iwe.u.qual.level = HFA384X_LEVEL_TO_dBm(sta->last_rx_signal);
2427 iwe.u.qual.noise = HFA384X_LEVEL_TO_dBm(sta->last_rx_silence);
2428 iwe.u.qual.updated = sta->last_rx_updated;
2429 iwe.len = IW_EV_QUAL_LEN;
2430 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2431 IW_EV_QUAL_LEN);
2432
2433#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2434 if (sta->ap) {
2435 memset(&iwe, 0, sizeof(iwe));
2436 iwe.cmd = SIOCGIWESSID;
2437 iwe.u.data.length = sta->u.ap.ssid_len;
2438 iwe.u.data.flags = 1;
2439 current_ev = iwe_stream_add_point(current_ev, end_buf,
2440 &iwe,
2441 sta->u.ap.ssid);
2442
2443 memset(&iwe, 0, sizeof(iwe));
2444 iwe.cmd = SIOCGIWENCODE;
2445 if (sta->capability & WLAN_CAPABILITY_PRIVACY)
2446 iwe.u.data.flags =
2447 IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
2448 else
2449 iwe.u.data.flags = IW_ENCODE_DISABLED;
2450 current_ev = iwe_stream_add_point(current_ev, end_buf,
2451 &iwe,
2452 sta->u.ap.ssid
2453 /* 0 byte memcpy */);
2454
2455 if (sta->u.ap.channel > 0 &&
2456 sta->u.ap.channel <= FREQ_COUNT) {
2457 memset(&iwe, 0, sizeof(iwe));
2458 iwe.cmd = SIOCGIWFREQ;
2459 iwe.u.freq.m = freq_list[sta->u.ap.channel - 1]
2460 * 100000;
2461 iwe.u.freq.e = 1;
2462 current_ev = iwe_stream_add_event(
2463 current_ev, end_buf, &iwe,
2464 IW_EV_FREQ_LEN);
2465 }
2466
2467 memset(&iwe, 0, sizeof(iwe));
2468 iwe.cmd = IWEVCUSTOM;
2469 sprintf(buf, "beacon_interval=%d",
2470 sta->listen_interval);
2471 iwe.u.data.length = strlen(buf);
2472 current_ev = iwe_stream_add_point(current_ev, end_buf,
2473 &iwe, buf);
2474 }
2475#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2476
c28df16e 2477 sta->last_rx_updated = IW_QUAL_DBM;
ff1d2767
JM		 2478
2479 /* To be continued, we should make good use of IWEVCUSTOM */
2480 }
2481
2482 spin_unlock_bh(&ap->sta_table_lock);
2483
2484 return current_ev - buffer;
2485}
2486
2487
2488static int prism2_hostapd_add_sta(struct ap_data *ap,
2489 struct prism2_hostapd_param *param)
2490{
2491 struct sta_info *sta;
2492
2493 spin_lock_bh(&ap->sta_table_lock);
2494 sta = ap_get_sta(ap, param->sta_addr);
2495 if (sta)
2496 atomic_inc(&sta->users);
2497 spin_unlock_bh(&ap->sta_table_lock);
2498
2499 if (sta == NULL) {
2500 sta = ap_add_sta(ap, param->sta_addr);
2501 if (sta == NULL)
2502 return -1;
2503 }
2504
2505 if (!(sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
2506 hostap_event_new_sta(sta->local->dev, sta);
2507
2508 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC;
2509 sta->last_rx = jiffies;
2510 sta->aid = param->u.add_sta.aid;
2511 sta->capability = param->u.add_sta.capability;
2512 sta->tx_supp_rates = param->u.add_sta.tx_supp_rates;
2513 if (sta->tx_supp_rates & WLAN_RATE_1M)
2514 sta->supported_rates[0] = 2;
2515 if (sta->tx_supp_rates & WLAN_RATE_2M)
2516 sta->supported_rates[1] = 4;
2517 if (sta->tx_supp_rates & WLAN_RATE_5M5)
2518 sta->supported_rates[2] = 11;
2519 if (sta->tx_supp_rates & WLAN_RATE_11M)
2520 sta->supported_rates[3] = 22;
2521 prism2_check_tx_rates(sta);
2522 atomic_dec(&sta->users);
2523 return 0;
2524}
2525
2526
2527static int prism2_hostapd_remove_sta(struct ap_data *ap,
2528 struct prism2_hostapd_param *param)
2529{
2530 struct sta_info *sta;
2531
2532 spin_lock_bh(&ap->sta_table_lock);
2533 sta = ap_get_sta(ap, param->sta_addr);
2534 if (sta) {
2535 ap_sta_hash_del(ap, sta);
2536 list_del(&sta->list);
2537 }
2538 spin_unlock_bh(&ap->sta_table_lock);
2539
2540 if (!sta)
2541 return -ENOENT;
2542
2543 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
2544 hostap_event_expired_sta(sta->local->dev, sta);
2545 ap_free_sta(ap, sta);
2546
2547 return 0;
2548}
2549
2550
2551static int prism2_hostapd_get_info_sta(struct ap_data *ap,
2552 struct prism2_hostapd_param *param)
2553{
2554 struct sta_info *sta;
2555
2556 spin_lock_bh(&ap->sta_table_lock);
2557 sta = ap_get_sta(ap, param->sta_addr);
2558 if (sta)
2559 atomic_inc(&sta->users);
2560 spin_unlock_bh(&ap->sta_table_lock);
2561
2562 if (!sta)
2563 return -ENOENT;
2564
2565 param->u.get_info_sta.inactive_sec = (jiffies - sta->last_rx) / HZ;
2566
2567 atomic_dec(&sta->users);
2568
2569 return 1;
2570}
2571
2572
2573static int prism2_hostapd_set_flags_sta(struct ap_data *ap,
2574 struct prism2_hostapd_param *param)
2575{
2576 struct sta_info *sta;
2577
2578 spin_lock_bh(&ap->sta_table_lock);
2579 sta = ap_get_sta(ap, param->sta_addr);
2580 if (sta) {
2581 sta->flags |= param->u.set_flags_sta.flags_or;
2582 sta->flags &= param->u.set_flags_sta.flags_and;
2583 }
2584 spin_unlock_bh(&ap->sta_table_lock);
2585
2586 if (!sta)
2587 return -ENOENT;
2588
2589 return 0;
2590}
2591
2592
2593static int prism2_hostapd_sta_clear_stats(struct ap_data *ap,
2594 struct prism2_hostapd_param *param)
2595{
2596 struct sta_info *sta;
2597 int rate;
2598
2599 spin_lock_bh(&ap->sta_table_lock);
2600 sta = ap_get_sta(ap, param->sta_addr);
2601 if (sta) {
2602 sta->rx_packets = sta->tx_packets = 0;
2603 sta->rx_bytes = sta->tx_bytes = 0;
2604 for (rate = 0; rate < WLAN_RATE_COUNT; rate++) {
2605 sta->tx_count[rate] = 0;
2606 sta->rx_count[rate] = 0;
2607 }
2608 }
2609 spin_unlock_bh(&ap->sta_table_lock);
2610
2611 if (!sta)
2612 return -ENOENT;
2613
2614 return 0;
2615}
2616
2617
5fad5a2e 2618int prism2_hostapd(struct ap_data *ap, struct prism2_hostapd_param *param)
ff1d2767
JM		 2619{
2620 switch (param->cmd) {
2621 case PRISM2_HOSTAPD_FLUSH:
2622 ap_control_kickall(ap);
2623 return 0;
2624 case PRISM2_HOSTAPD_ADD_STA:
2625 return prism2_hostapd_add_sta(ap, param);
2626 case PRISM2_HOSTAPD_REMOVE_STA:
2627 return prism2_hostapd_remove_sta(ap, param);
2628 case PRISM2_HOSTAPD_GET_INFO_STA:
2629 return prism2_hostapd_get_info_sta(ap, param);
2630 case PRISM2_HOSTAPD_SET_FLAGS_STA:
2631 return prism2_hostapd_set_flags_sta(ap, param);
2632 case PRISM2_HOSTAPD_STA_CLEAR_STATS:
2633 return prism2_hostapd_sta_clear_stats(ap, param);
2634 default:
2635 printk(KERN_WARNING "prism2_hostapd: unknown cmd=%d\n",
2636 param->cmd);
2637 return -EOPNOTSUPP;
2638 }
2639}
2640
2641
2642/* Update station info for host-based TX rate control and return current
2643 * TX rate */
2644static int ap_update_sta_tx_rate(struct sta_info *sta, struct net_device *dev)
2645{
2646 int ret = sta->tx_rate;
2647 struct hostap_interface *iface;
2648 local_info_t *local;
2649
2650 iface = netdev_priv(dev);
2651 local = iface->local;
2652
2653 sta->tx_count[sta->tx_rate_idx]++;
2654 sta->tx_since_last_failure++;
2655 sta->tx_consecutive_exc = 0;
2656 if (sta->tx_since_last_failure >= WLAN_RATE_UPDATE_COUNT &&
2657 sta->tx_rate_idx < sta->tx_max_rate) {
2658 /* use next higher rate */
2659 int old_rate, new_rate;
2660 old_rate = new_rate = sta->tx_rate_idx;
2661 while (new_rate < sta->tx_max_rate) {
2662 new_rate++;
2663 if (ap_tx_rate_ok(new_rate, sta, local)) {
2664 sta->tx_rate_idx = new_rate;
2665 break;
2666 }
2667 }
2668 if (old_rate != sta->tx_rate_idx) {
2669 switch (sta->tx_rate_idx) {
2670 case 0: sta->tx_rate = 10; break;
2671 case 1: sta->tx_rate = 20; break;
2672 case 2: sta->tx_rate = 55; break;
2673 case 3: sta->tx_rate = 110; break;
2674 default: sta->tx_rate = 0; break;
2675 }
2676 PDEBUG(DEBUG_AP, "%s: STA " MACSTR " TX rate raised to"
2677 " %d\n", dev->name, MAC2STR(sta->addr),
2678 sta->tx_rate);
2679 }
2680 sta->tx_since_last_failure = 0;
2681 }
2682
2683 return ret;
2684}
2685
2686
2687/* Called only from software IRQ. Called for each TX frame prior possible
2688 * encryption and transmit. */
2689ap_tx_ret hostap_handle_sta_tx(local_info_t *local, struct hostap_tx_data *tx)
2690{
2691 struct sta_info *sta = NULL;
2692 struct sk_buff *skb = tx->skb;
2693 int set_tim, ret;
d041674d 2694 struct ieee80211_hdr_4addr *hdr;
ff1d2767
JM		 2695 struct hostap_skb_tx_data *meta;
2696
2697 meta = (struct hostap_skb_tx_data *) skb->cb;
2698 ret = AP_TX_CONTINUE;
2699 if (local->ap == NULL || skb->len < 10 ||
2700 meta->iface->type == HOSTAP_INTERFACE_STA)
2701 goto out;
2702
d041674d 2703 hdr = (struct ieee80211_hdr_4addr *) skb->data;
ff1d2767
JM		 2704
2705 if (hdr->addr1[0] & 0x01) {
2706 /* broadcast/multicast frame - no AP related processing */
2707 goto out;
2708 }
2709
2710 /* unicast packet - check whether destination STA is associated */
2711 spin_lock(&local->ap->sta_table_lock);
2712 sta = ap_get_sta(local->ap, hdr->addr1);
2713 if (sta)
2714 atomic_inc(&sta->users);
2715 spin_unlock(&local->ap->sta_table_lock);
2716
5bee720f
JM		 2717 if (local->iw_mode == IW_MODE_MASTER && sta == NULL &&
2718 !(meta->flags & HOSTAP_TX_FLAGS_WDS) &&
ff1d2767
JM		 2719 meta->iface->type != HOSTAP_INTERFACE_MASTER &&
2720 meta->iface->type != HOSTAP_INTERFACE_AP) {
2721#if 0
2722 /* This can happen, e.g., when wlan0 is added to a bridge and
2723 * bridging code does not know which port is the correct target
2724 * for a unicast frame. In this case, the packet is send to all
2725 * ports of the bridge. Since this is a valid scenario, do not
2726 * print out any errors here. */
2727 if (net_ratelimit()) {
2728 printk(KERN_DEBUG "AP: drop packet to non-associated "
2729 "STA " MACSTR "\n", MAC2STR(hdr->addr1));
2730 }
2731#endif
2732 local->ap->tx_drop_nonassoc++;
2733 ret = AP_TX_DROP;
2734 goto out;
2735 }
2736
2737 if (sta == NULL)
2738 goto out;
2739
2740 if (!(sta->flags & WLAN_STA_AUTHORIZED))
2741 ret = AP_TX_CONTINUE_NOT_AUTHORIZED;
2742
2743 /* Set tx_rate if using host-based TX rate control */
2744 if (!local->fw_tx_rate_control)
2745 local->ap->last_tx_rate = meta->rate =
2746 ap_update_sta_tx_rate(sta, local->dev);
2747
2748 if (local->iw_mode != IW_MODE_MASTER)
2749 goto out;
2750
2751 if (!(sta->flags & WLAN_STA_PS))
2752 goto out;
2753
5bee720f
JM		 2754 if (meta->flags & HOSTAP_TX_FLAGS_ADD_MOREDATA) {
2755 /* indicate to STA that more frames follow */
b2f4a2e3
JM		 2756 hdr->frame_ctl |=
2757 __constant_cpu_to_le16(IEEE80211_FCTL_MOREDATA);
5bee720f 2758 }
ff1d2767 2759
5bee720f
JM		 2760 if (meta->flags & HOSTAP_TX_FLAGS_BUFFERED_FRAME) {
2761 /* packet was already buffered and now send due to
2762 * PS poll, so do not rebuffer it */
2763 goto out;
ff1d2767
JM		 2764 }
2765
2766 if (skb_queue_len(&sta->tx_buf) >= STA_MAX_TX_BUFFER) {
2767 PDEBUG(DEBUG_PS, "%s: No more space in STA (" MACSTR ")'s PS "
2768 "mode buffer\n", local->dev->name, MAC2STR(sta->addr));
2769 /* Make sure that TIM is set for the station (it might not be
2770 * after AP wlan hw reset). */
2771 /* FIX: should fix hw reset to restore bits based on STA
2772 * buffer state.. */
2773 hostap_set_tim(local, sta->aid, 1);
2774 sta->flags |= WLAN_STA_TIM;
2775 ret = AP_TX_DROP;
2776 goto out;
2777 }
2778
2779 /* STA in PS mode, buffer frame for later delivery */
2780 set_tim = skb_queue_empty(&sta->tx_buf);
2781 skb_queue_tail(&sta->tx_buf, skb);
2782 /* FIX: could save RX time to skb and expire buffered frames after
2783 * some time if STA does not poll for them */
2784
2785 if (set_tim) {
2786 if (sta->flags & WLAN_STA_TIM)
2787 PDEBUG(DEBUG_PS2, "Re-setting TIM for aid %d\n",
2788 sta->aid);
2789 hostap_set_tim(local, sta->aid, 1);
2790 sta->flags |= WLAN_STA_TIM;
2791 }
2792
2793 ret = AP_TX_BUFFERED;
2794
2795 out:
2796 if (sta != NULL) {
2797 if (ret == AP_TX_CONTINUE ||
2798 ret == AP_TX_CONTINUE_NOT_AUTHORIZED) {
2799 sta->tx_packets++;
2800 sta->tx_bytes += skb->len;
2801 sta->last_tx = jiffies;
2802 }
2803
2804 if ((ret == AP_TX_CONTINUE ||
2805 ret == AP_TX_CONTINUE_NOT_AUTHORIZED) &&
2806 sta->crypt && tx->host_encrypt) {
2807 tx->crypt = sta->crypt;
2808 tx->sta_ptr = sta; /* hostap_handle_sta_release() will
2809 * be called to release sta info
2810 * later */
2811 } else
2812 atomic_dec(&sta->users);
2813 }
2814
2815 return ret;
2816}
2817
2818
2819void hostap_handle_sta_release(void *ptr)
2820{
2821 struct sta_info *sta = ptr;
2822 atomic_dec(&sta->users);
2823}
2824
2825
2826/* Called only as a tasklet (software IRQ) */
2827void hostap_handle_sta_tx_exc(local_info_t *local, struct sk_buff *skb)
2828{
2829 struct sta_info *sta;
d041674d 2830 struct ieee80211_hdr_4addr *hdr;
ff1d2767
JM		 2831 struct hostap_skb_tx_data *meta;
2832
d041674d 2833 hdr = (struct ieee80211_hdr_4addr *) skb->data;
ff1d2767
JM		 2834 meta = (struct hostap_skb_tx_data *) skb->cb;
2835
2836 spin_lock(&local->ap->sta_table_lock);
2837 sta = ap_get_sta(local->ap, hdr->addr1);
2838 if (!sta) {
2839 spin_unlock(&local->ap->sta_table_lock);
2840 PDEBUG(DEBUG_AP, "%s: Could not find STA " MACSTR " for this "
2841 "TX error (@%lu)\n",
2842 local->dev->name, MAC2STR(hdr->addr1), jiffies);
2843 return;
2844 }
2845
2846 sta->tx_since_last_failure = 0;
2847 sta->tx_consecutive_exc++;
74fae82c 2848
ff1d2767
JM		 2849 if (sta->tx_consecutive_exc >= WLAN_RATE_DECREASE_THRESHOLD &&
2850 sta->tx_rate_idx > 0 && meta->rate <= sta->tx_rate) {
2851 /* use next lower rate */
2852 int old, rate;
2853 old = rate = sta->tx_rate_idx;
2854 while (rate > 0) {
2855 rate--;
2856 if (ap_tx_rate_ok(rate, sta, local)) {
2857 sta->tx_rate_idx = rate;
2858 break;
2859 }
2860 }
2861 if (old != sta->tx_rate_idx) {
2862 switch (sta->tx_rate_idx) {
2863 case 0: sta->tx_rate = 10; break;
2864 case 1: sta->tx_rate = 20; break;
2865 case 2: sta->tx_rate = 55; break;
2866 case 3: sta->tx_rate = 110; break;
2867 default: sta->tx_rate = 0; break;
2868 }
2869 PDEBUG(DEBUG_AP, "%s: STA " MACSTR " TX rate lowered "
2870 "to %d\n", local->dev->name, MAC2STR(sta->addr),
2871 sta->tx_rate);
2872 }
2873 sta->tx_consecutive_exc = 0;
2874 }
2875 spin_unlock(&local->ap->sta_table_lock);
2876}
2877
2878
2879static void hostap_update_sta_ps2(local_info_t *local, struct sta_info *sta,
2880 int pwrmgt, int type, int stype)
2881{
2882 if (pwrmgt && !(sta->flags & WLAN_STA_PS)) {
2883 sta->flags |= WLAN_STA_PS;
2884 PDEBUG(DEBUG_PS2, "STA " MACSTR " changed to use PS "
2885 "mode (type=0x%02X, stype=0x%02X)\n",
4339d328 2886 MAC2STR(sta->addr), type >> 2, stype >> 4);
ff1d2767
JM		 2887 } else if (!pwrmgt && (sta->flags & WLAN_STA_PS)) {
2888 sta->flags &= ~WLAN_STA_PS;
2889 PDEBUG(DEBUG_PS2, "STA " MACSTR " changed to not use "
2890 "PS mode (type=0x%02X, stype=0x%02X)\n",
4339d328
JM		 2891 MAC2STR(sta->addr), type >> 2, stype >> 4);
2892 if (type != IEEE80211_FTYPE_CTL ||
2893 stype != IEEE80211_STYPE_PSPOLL)
ff1d2767
JM		 2894 schedule_packet_send(local, sta);
2895 }
2896}
2897
2898
2899/* Called only as a tasklet (software IRQ). Called for each RX frame to update
c0f72ca8 2900 * STA power saving state. pwrmgt is a flag from 802.11 frame_ctl field. */
d041674d 2901int hostap_update_sta_ps(local_info_t *local, struct ieee80211_hdr_4addr *hdr)
ff1d2767
JM		 2902{
2903 struct sta_info *sta;
2904 u16 fc;
2905
2906 spin_lock(&local->ap->sta_table_lock);
2907 sta = ap_get_sta(local->ap, hdr->addr2);
2908 if (sta)
2909 atomic_inc(&sta->users);
2910 spin_unlock(&local->ap->sta_table_lock);
2911
2912 if (!sta)
2913 return -1;
2914
c0f72ca8 2915 fc = le16_to_cpu(hdr->frame_ctl);
b2f4a2e3 2916 hostap_update_sta_ps2(local, sta, fc & IEEE80211_FCTL_PM,
4339d328 2917 WLAN_FC_GET_TYPE(fc), WLAN_FC_GET_STYPE(fc));
ff1d2767
JM		 2918
2919 atomic_dec(&sta->users);
2920 return 0;
2921}
2922
2923
2924/* Called only as a tasklet (software IRQ). Called for each RX frame after
2925 * getting RX header and payload from hardware. */
2926ap_rx_ret hostap_handle_sta_rx(local_info_t *local, struct net_device *dev,
2927 struct sk_buff *skb,
2928 struct hostap_80211_rx_status *rx_stats,
2929 int wds)
2930{
2931 int ret;
2932 struct sta_info *sta;
2933 u16 fc, type, stype;
d041674d 2934 struct ieee80211_hdr_4addr *hdr;
ff1d2767
JM		 2935
2936 if (local->ap == NULL)
2937 return AP_RX_CONTINUE;
2938
d041674d 2939 hdr = (struct ieee80211_hdr_4addr *) skb->data;
ff1d2767 2940
c0f72ca8 2941 fc = le16_to_cpu(hdr->frame_ctl);
4339d328
JM		 2942 type = WLAN_FC_GET_TYPE(fc);
2943 stype = WLAN_FC_GET_STYPE(fc);
ff1d2767
JM		 2944
2945 spin_lock(&local->ap->sta_table_lock);
2946 sta = ap_get_sta(local->ap, hdr->addr2);
2947 if (sta)
2948 atomic_inc(&sta->users);
2949 spin_unlock(&local->ap->sta_table_lock);
2950
2951 if (sta && !(sta->flags & WLAN_STA_AUTHORIZED))
2952 ret = AP_RX_CONTINUE_NOT_AUTHORIZED;
2953 else
2954 ret = AP_RX_CONTINUE;
2955
2956
b2f4a2e3 2957 if (fc & IEEE80211_FCTL_TODS) {
ff1d2767
JM		 2958 if (!wds && (sta == NULL || !(sta->flags & WLAN_STA_ASSOC))) {
2959 if (local->hostapd) {
2960 prism2_rx_80211(local->apdev, skb, rx_stats,
2961 PRISM2_RX_NON_ASSOC);
2962#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2963 } else {
2964 printk(KERN_DEBUG "%s: dropped received packet"
2965 " from non-associated STA " MACSTR
2966 " (type=0x%02x, subtype=0x%02x)\n",
4339d328
JM		 2967 dev->name, MAC2STR(hdr->addr2),
2968 type >> 2, stype >> 4);
ff1d2767
JM		 2969 hostap_rx(dev, skb, rx_stats);
2970#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2971 }
2972 ret = AP_RX_EXIT;
2973 goto out;
2974 }
b2f4a2e3 2975 } else if (fc & IEEE80211_FCTL_FROMDS) {
ff1d2767
JM		 2976 if (!wds) {
2977 /* FromDS frame - not for us; probably
2978 * broadcast/multicast in another BSS - drop */
2979 if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
2980 printk(KERN_DEBUG "Odd.. FromDS packet "
2981 "received with own BSSID\n");
2982 hostap_dump_rx_80211(dev->name, skb, rx_stats);
2983 }
2984 ret = AP_RX_DROP;
2985 goto out;
2986 }
4339d328 2987 } else if (stype == IEEE80211_STYPE_NULLFUNC && sta == NULL &&
ff1d2767
JM		 2988 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
2989
2990 if (local->hostapd) {
2991 prism2_rx_80211(local->apdev, skb, rx_stats,
2992 PRISM2_RX_NON_ASSOC);
2993#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2994 } else {
2995 /* At least Lucent f/w seems to send data::nullfunc
2996 * frames with no ToDS flag when the current AP returns
2997 * after being unavailable for some time. Speed up
2998 * re-association by informing the station about it not
2999 * being associated. */
3000 printk(KERN_DEBUG "%s: rejected received nullfunc "
3001 "frame without ToDS from not associated STA "
3002 MACSTR "\n",
3003 dev->name, MAC2STR(hdr->addr2));
3004 hostap_rx(dev, skb, rx_stats);
3005#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
3006 }
3007 ret = AP_RX_EXIT;
3008 goto out;
4339d328 3009 } else if (stype == IEEE80211_STYPE_NULLFUNC) {
ff1d2767
JM		 3010 /* At least Lucent cards seem to send periodic nullfunc
3011 * frames with ToDS. Let these through to update SQ
3012 * stats and PS state. Nullfunc frames do not contain
3013 * any data and they will be dropped below. */
3014 } else {
3015 /* If BSSID (Addr3) is foreign, this frame is a normal
3016 * broadcast frame from an IBSS network. Drop it silently.
3017 * If BSSID is own, report the dropping of this frame. */
3018 if (memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
3019 printk(KERN_DEBUG "%s: dropped received packet from "
3020 MACSTR " with no ToDS flag (type=0x%02x, "
3021 "subtype=0x%02x)\n", dev->name,
4339d328 3022 MAC2STR(hdr->addr2), type >> 2, stype >> 4);
ff1d2767
JM		 3023 hostap_dump_rx_80211(dev->name, skb, rx_stats);
3024 }
3025 ret = AP_RX_DROP;
3026 goto out;
3027 }
3028
3029 if (sta) {
b2f4a2e3 3030 hostap_update_sta_ps2(local, sta, fc & IEEE80211_FCTL_PM,
ff1d2767
JM		 3031 type, stype);
3032
3033 sta->rx_packets++;
3034 sta->rx_bytes += skb->len;
3035 sta->last_rx = jiffies;
3036 }
3037
4339d328 3038 if (local->ap->nullfunc_ack && stype == IEEE80211_STYPE_NULLFUNC &&
b2f4a2e3 3039 fc & IEEE80211_FCTL_TODS) {
ff1d2767
JM		 3040 if (local->hostapd) {
3041 prism2_rx_80211(local->apdev, skb, rx_stats,
3042 PRISM2_RX_NULLFUNC_ACK);
3043#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
3044 } else {
3045 /* some STA f/w's seem to require control::ACK frame
3046 * for data::nullfunc, but Prism2 f/w 0.8.0 (at least
3047 * from Compaq) does not send this.. Try to generate
3048 * ACK for these frames from the host driver to make
3049 * power saving work with, e.g., Lucent WaveLAN f/w */
3050 hostap_rx(dev, skb, rx_stats);
3051#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
3052 }
3053 ret = AP_RX_EXIT;
3054 goto out;
3055 }
3056
3057 out:
3058 if (sta)
3059 atomic_dec(&sta->users);
3060
3061 return ret;
3062}
3063
3064
3065/* Called only as a tasklet (software IRQ) */
3066int hostap_handle_sta_crypto(local_info_t *local,
d041674d 3067 struct ieee80211_hdr_4addr *hdr,
62fe7e37
JM		 3068 struct ieee80211_crypt_data **crypt,
3069 void **sta_ptr)
ff1d2767
JM		 3070{
3071 struct sta_info *sta;
3072
3073 spin_lock(&local->ap->sta_table_lock);
3074 sta = ap_get_sta(local->ap, hdr->addr2);
3075 if (sta)
3076 atomic_inc(&sta->users);
3077 spin_unlock(&local->ap->sta_table_lock);
3078
3079 if (!sta)
3080 return -1;
3081
3082 if (sta->crypt) {
3083 *crypt = sta->crypt;
3084 *sta_ptr = sta;
3085 /* hostap_handle_sta_release() will be called to release STA
3086 * info */
3087 } else
3088 atomic_dec(&sta->users);
3089
3090 return 0;
3091}
3092
3093
3094/* Called only as a tasklet (software IRQ) */
3095int hostap_is_sta_assoc(struct ap_data *ap, u8 *sta_addr)
3096{
3097 struct sta_info *sta;
3098 int ret = 0;
3099
3100 spin_lock(&ap->sta_table_lock);
3101 sta = ap_get_sta(ap, sta_addr);
3102 if (sta != NULL && (sta->flags & WLAN_STA_ASSOC) && !sta->ap)
3103 ret = 1;
3104 spin_unlock(&ap->sta_table_lock);
3105
3106 return ret;
3107}
3108
3109
3110/* Called only as a tasklet (software IRQ) */
3111int hostap_is_sta_authorized(struct ap_data *ap, u8 *sta_addr)
3112{
3113 struct sta_info *sta;
3114 int ret = 0;
3115
3116 spin_lock(&ap->sta_table_lock);
3117 sta = ap_get_sta(ap, sta_addr);
3118 if (sta != NULL && (sta->flags & WLAN_STA_ASSOC) && !sta->ap &&
3119 ((sta->flags & WLAN_STA_AUTHORIZED) ||
3120 ap->local->ieee_802_1x == 0))
3121 ret = 1;
3122 spin_unlock(&ap->sta_table_lock);
3123
3124 return ret;
3125}
3126
3127
3128/* Called only as a tasklet (software IRQ) */
3129int hostap_add_sta(struct ap_data *ap, u8 *sta_addr)
3130{
3131 struct sta_info *sta;
3132 int ret = 1;
3133
3134 if (!ap)
3135 return -1;
3136
3137 spin_lock(&ap->sta_table_lock);
3138 sta = ap_get_sta(ap, sta_addr);
3139 if (sta)
3140 ret = 0;
3141 spin_unlock(&ap->sta_table_lock);
3142
3143 if (ret == 1) {
3144 sta = ap_add_sta(ap, sta_addr);
3145 if (!sta)
54b85f48 3146 return -1;
ff1d2767
JM		 3147 sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
3148 sta->ap = 1;
3149 memset(sta->supported_rates, 0, sizeof(sta->supported_rates));
3150 /* No way of knowing which rates are supported since we did not
3151 * get supported rates element from beacon/assoc req. Assume
3152 * that remote end supports all 802.11b rates. */
3153 sta->supported_rates[0] = 0x82;
3154 sta->supported_rates[1] = 0x84;
3155 sta->supported_rates[2] = 0x0b;
3156 sta->supported_rates[3] = 0x16;
3157 sta->tx_supp_rates = WLAN_RATE_1M | WLAN_RATE_2M |
3158 WLAN_RATE_5M5 | WLAN_RATE_11M;
3159 sta->tx_rate = 110;
3160 sta->tx_max_rate = sta->tx_rate_idx = 3;
3161 }
3162
3163 return ret;
3164}
3165
3166
3167/* Called only as a tasklet (software IRQ) */
3168int hostap_update_rx_stats(struct ap_data *ap,
d041674d 3169 struct ieee80211_hdr_4addr *hdr,
ff1d2767
JM		 3170 struct hostap_80211_rx_status *rx_stats)
3171{
3172 struct sta_info *sta;
3173
3174 if (!ap)
3175 return -1;
3176
3177 spin_lock(&ap->sta_table_lock);
3178 sta = ap_get_sta(ap, hdr->addr2);
3179 if (sta) {
3180 sta->last_rx_silence = rx_stats->noise;
3181 sta->last_rx_signal = rx_stats->signal;
3182 sta->last_rx_rate = rx_stats->rate;
c28df16e 3183 sta->last_rx_updated = IW_QUAL_ALL_UPDATED | IW_QUAL_DBM;
ff1d2767
JM		 3184 if (rx_stats->rate == 10)
3185 sta->rx_count[0]++;
3186 else if (rx_stats->rate == 20)
3187 sta->rx_count[1]++;
3188 else if (rx_stats->rate == 55)
3189 sta->rx_count[2]++;
3190 else if (rx_stats->rate == 110)
3191 sta->rx_count[3]++;
3192 }
3193 spin_unlock(&ap->sta_table_lock);
3194
3195 return sta ? 0 : -1;
3196}
3197
3198
3199void hostap_update_rates(local_info_t *local)
3200{
3201 struct list_head *ptr;
3202 struct ap_data *ap = local->ap;
3203
3204 if (!ap)
3205 return;
3206
3207 spin_lock_bh(&ap->sta_table_lock);
3208 for (ptr = ap->sta_list.next; ptr != &ap->sta_list; ptr = ptr->next) {
3209 struct sta_info *sta = (struct sta_info *) ptr;
3210 prism2_check_tx_rates(sta);
3211 }
3212 spin_unlock_bh(&ap->sta_table_lock);
3213}
3214
3215
5fad5a2e
AB		 3216void * ap_crypt_get_ptrs(struct ap_data *ap, u8 *addr, int permanent,
3217 struct ieee80211_crypt_data ***crypt)
ff1d2767
JM		 3218{
3219 struct sta_info *sta;
3220
3221 spin_lock_bh(&ap->sta_table_lock);
3222 sta = ap_get_sta(ap, addr);
3223 if (sta)
3224 atomic_inc(&sta->users);
3225 spin_unlock_bh(&ap->sta_table_lock);
3226
3227 if (!sta && permanent)
3228 sta = ap_add_sta(ap, addr);
3229
3230 if (!sta)
3231 return NULL;
3232
3233 if (permanent)
3234 sta->flags |= WLAN_STA_PERM;
3235
3236 *crypt = &sta->crypt;
3237
3238 return sta;
3239}
3240
3241
3242void hostap_add_wds_links(local_info_t *local)
3243{
3244 struct ap_data *ap = local->ap;
3245 struct list_head *ptr;
3246
3247 spin_lock_bh(&ap->sta_table_lock);
3248 list_for_each(ptr, &ap->sta_list) {
3249 struct sta_info *sta = list_entry(ptr, struct sta_info, list);
3250 if (sta->ap)
3251 hostap_wds_link_oper(local, sta->addr, WDS_ADD);
3252 }
3253 spin_unlock_bh(&ap->sta_table_lock);
3254
3255 schedule_work(&local->ap->wds_oper_queue);
3256}
3257
3258
3259void hostap_wds_link_oper(local_info_t *local, u8 *addr, wds_oper_type type)
3260{
3261 struct wds_oper_data *entry;
3262
3263 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
3264 if (!entry)
3265 return;
3266 memcpy(entry->addr, addr, ETH_ALEN);
3267 entry->type = type;
3268 spin_lock_bh(&local->lock);
3269 entry->next = local->ap->wds_oper_entries;
3270 local->ap->wds_oper_entries = entry;
3271 spin_unlock_bh(&local->lock);
3272
3273 schedule_work(&local->ap->wds_oper_queue);
3274}
3275
3276
3277EXPORT_SYMBOL(hostap_init_data);
3278EXPORT_SYMBOL(hostap_init_ap_proc);
3279EXPORT_SYMBOL(hostap_free_data);
3280EXPORT_SYMBOL(hostap_check_sta_fw_version);
ff1d2767 3281EXPORT_SYMBOL(hostap_handle_sta_tx_exc);
ff1d2767 3282#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
ff1d2767 3283#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
Linux kernel - Deliverables
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