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[PATCH] hostap: Use list_for_each_entry
[GitHub/mt8127/android_kernel_alcatel_ttab.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
85d32e7b
JM		 4 * <j@w1.fi>
5 * Copyright (c) 2002-2005, Jouni Malinen <j@w1.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;
ff1d2767
JM		 329 struct mac_entry *entry;
330
331 if (off != 0) {
332 *eof = 1;
333 return 0;
334 }
335
336 switch (ap->mac_restrictions.policy) {
337 case MAC_POLICY_OPEN:
338 policy_txt = "open";
339 break;
340 case MAC_POLICY_ALLOW:
341 policy_txt = "allow";
342 break;
343 case MAC_POLICY_DENY:
344 policy_txt = "deny";
345 break;
346 default:
347 policy_txt = "unknown";
348 break;
349 };
350 p += sprintf(p, "MAC policy: %s\n", policy_txt);
351 p += sprintf(p, "MAC entries: %u\n", ap->mac_restrictions.entries);
352 p += sprintf(p, "MAC list:\n");
353 spin_lock_bh(&ap->mac_restrictions.lock);
c1505731 354 list_for_each_entry(entry, &ap->mac_restrictions.mac_list, list) {
ff1d2767
JM		 355 if (p - page > PAGE_SIZE - 80) {
356 p += sprintf(p, "All entries did not fit one page.\n");
357 break;
358 }
359
ff1d2767
JM		 360 p += sprintf(p, MACSTR "\n", MAC2STR(entry->addr));
361 }
362 spin_unlock_bh(&ap->mac_restrictions.lock);
363
364 return (p - page);
365}
366
367
5fad5a2e 368int ap_control_add_mac(struct mac_restrictions *mac_restrictions, u8 *mac)
ff1d2767
JM		 369{
370 struct mac_entry *entry;
371
372 entry = kmalloc(sizeof(struct mac_entry), GFP_KERNEL);
373 if (entry == NULL)
374 return -1;
375
376 memcpy(entry->addr, mac, ETH_ALEN);
377
378 spin_lock_bh(&mac_restrictions->lock);
379 list_add_tail(&entry->list, &mac_restrictions->mac_list);
380 mac_restrictions->entries++;
381 spin_unlock_bh(&mac_restrictions->lock);
382
383 return 0;
384}
385
386
5fad5a2e 387int ap_control_del_mac(struct mac_restrictions *mac_restrictions, u8 *mac)
ff1d2767
JM		 388{
389 struct list_head *ptr;
390 struct mac_entry *entry;
391
392 spin_lock_bh(&mac_restrictions->lock);
393 for (ptr = mac_restrictions->mac_list.next;
394 ptr != &mac_restrictions->mac_list; ptr = ptr->next) {
395 entry = list_entry(ptr, struct mac_entry, list);
396
397 if (memcmp(entry->addr, mac, ETH_ALEN) == 0) {
398 list_del(ptr);
399 kfree(entry);
400 mac_restrictions->entries--;
401 spin_unlock_bh(&mac_restrictions->lock);
402 return 0;
403 }
404 }
405 spin_unlock_bh(&mac_restrictions->lock);
406 return -1;
407}
408
409
410static int ap_control_mac_deny(struct mac_restrictions *mac_restrictions,
411 u8 *mac)
412{
ff1d2767
JM		 413 struct mac_entry *entry;
414 int found = 0;
415
416 if (mac_restrictions->policy == MAC_POLICY_OPEN)
417 return 0;
418
419 spin_lock_bh(&mac_restrictions->lock);
c1505731 420 list_for_each_entry(entry, &mac_restrictions->mac_list, list) {
ff1d2767
JM		 421 if (memcmp(entry->addr, mac, ETH_ALEN) == 0) {
422 found = 1;
423 break;
424 }
425 }
426 spin_unlock_bh(&mac_restrictions->lock);
427
428 if (mac_restrictions->policy == MAC_POLICY_ALLOW)
429 return !found;
430 else
431 return found;
432}
433
434
5fad5a2e 435void ap_control_flush_macs(struct mac_restrictions *mac_restrictions)
ff1d2767
JM		 436{
437 struct list_head *ptr, *n;
438 struct mac_entry *entry;
439
440 if (mac_restrictions->entries == 0)
441 return;
442
443 spin_lock_bh(&mac_restrictions->lock);
444 for (ptr = mac_restrictions->mac_list.next, n = ptr->next;
445 ptr != &mac_restrictions->mac_list;
446 ptr = n, n = ptr->next) {
447 entry = list_entry(ptr, struct mac_entry, list);
448 list_del(ptr);
449 kfree(entry);
450 }
451 mac_restrictions->entries = 0;
452 spin_unlock_bh(&mac_restrictions->lock);
453}
454
455
5fad5a2e 456int ap_control_kick_mac(struct ap_data *ap, struct net_device *dev, u8 *mac)
ff1d2767
JM		 457{
458 struct sta_info *sta;
459 u16 resp;
460
461 spin_lock_bh(&ap->sta_table_lock);
462 sta = ap_get_sta(ap, mac);
463 if (sta) {
464 ap_sta_hash_del(ap, sta);
465 list_del(&sta->list);
466 }
467 spin_unlock_bh(&ap->sta_table_lock);
468
469 if (!sta)
470 return -EINVAL;
471
472 resp = cpu_to_le16(WLAN_REASON_PREV_AUTH_NOT_VALID);
4339d328 473 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_DEAUTH,
ff1d2767
JM		 474 (char *) &resp, 2, sta->addr, 0);
475
476 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap)
477 hostap_event_expired_sta(dev, sta);
478
479 ap_free_sta(ap, sta);
480
481 return 0;
482}
483
484#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
485
486
5fad5a2e 487void ap_control_kickall(struct ap_data *ap)
ff1d2767
JM		 488{
489 struct list_head *ptr, *n;
490 struct sta_info *sta;
74fae82c 491
ff1d2767
JM		 492 spin_lock_bh(&ap->sta_table_lock);
493 for (ptr = ap->sta_list.next, n = ptr->next; ptr != &ap->sta_list;
494 ptr = n, n = ptr->next) {
495 sta = list_entry(ptr, struct sta_info, list);
496 ap_sta_hash_del(ap, sta);
497 list_del(&sta->list);
498 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
499 hostap_event_expired_sta(sta->local->dev, sta);
500 ap_free_sta(ap, sta);
501 }
502 spin_unlock_bh(&ap->sta_table_lock);
503}
504
505
506#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
507
508#define PROC_LIMIT (PAGE_SIZE - 80)
509
510static int prism2_ap_proc_read(char *page, char **start, off_t off,
511 int count, int *eof, void *data)
512{
513 char *p = page;
514 struct ap_data *ap = (struct ap_data *) data;
c1505731 515 struct sta_info *sta;
ff1d2767
JM		 516 int i;
517
518 if (off > PROC_LIMIT) {
519 *eof = 1;
520 return 0;
521 }
522
523 p += sprintf(p, "# BSSID CHAN SIGNAL NOISE RATE SSID FLAGS\n");
524 spin_lock_bh(&ap->sta_table_lock);
c1505731 525 list_for_each_entry(sta, &ap->sta_list, list) {
ff1d2767
JM		 526 if (!sta->ap)
527 continue;
528
529 p += sprintf(p, MACSTR " %d %d %d %d '", MAC2STR(sta->addr),
530 sta->u.ap.channel, sta->last_rx_signal,
531 sta->last_rx_silence, sta->last_rx_rate);
532 for (i = 0; i < sta->u.ap.ssid_len; i++)
533 p += sprintf(p, ((sta->u.ap.ssid[i] >= 32 &&
534 sta->u.ap.ssid[i] < 127) ?
535 "%c" : "<%02x>"),
536 sta->u.ap.ssid[i]);
537 p += sprintf(p, "'");
538 if (sta->capability & WLAN_CAPABILITY_ESS)
539 p += sprintf(p, " [ESS]");
540 if (sta->capability & WLAN_CAPABILITY_IBSS)
541 p += sprintf(p, " [IBSS]");
542 if (sta->capability & WLAN_CAPABILITY_PRIVACY)
543 p += sprintf(p, " [WEP]");
544 p += sprintf(p, "\n");
545
546 if ((p - page) > PROC_LIMIT) {
547 printk(KERN_DEBUG "hostap: ap proc did not fit\n");
548 break;
549 }
550 }
551 spin_unlock_bh(&ap->sta_table_lock);
552
553 if ((p - page) <= off) {
554 *eof = 1;
555 return 0;
556 }
557
558 *start = page + off;
559
560 return (p - page - off);
561}
562#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
563
564
565void hostap_check_sta_fw_version(struct ap_data *ap, int sta_fw_ver)
566{
567 if (!ap)
568 return;
569
570 if (sta_fw_ver == PRISM2_FW_VER(0,8,0)) {
571 PDEBUG(DEBUG_AP, "Using data::nullfunc ACK workaround - "
572 "firmware upgrade recommended\n");
573 ap->nullfunc_ack = 1;
574 } else
575 ap->nullfunc_ack = 0;
576
577 if (sta_fw_ver == PRISM2_FW_VER(1,4,2)) {
578 printk(KERN_WARNING "%s: Warning: secondary station firmware "
579 "version 1.4.2 does not seem to work in Host AP mode\n",
580 ap->local->dev->name);
581 }
582}
583
584
585/* Called only as a tasklet (software IRQ) */
586static void hostap_ap_tx_cb(struct sk_buff *skb, int ok, void *data)
587{
588 struct ap_data *ap = data;
589 u16 fc;
d041674d 590 struct ieee80211_hdr_4addr *hdr;
ff1d2767
JM		 591
592 if (!ap->local->hostapd || !ap->local->apdev) {
593 dev_kfree_skb(skb);
594 return;
595 }
596
d041674d 597 hdr = (struct ieee80211_hdr_4addr *) skb->data;
c0f72ca8 598 fc = le16_to_cpu(hdr->frame_ctl);
ff1d2767
JM		 599
600 /* Pass the TX callback frame to the hostapd; use 802.11 header version
601 * 1 to indicate failure (no ACK) and 2 success (frame ACKed) */
602
b2f4a2e3 603 fc &= ~IEEE80211_FCTL_VERS;
ff1d2767 604 fc |= ok ? BIT(1) : BIT(0);
c0f72ca8 605 hdr->frame_ctl = cpu_to_le16(fc);
ff1d2767
JM		 606
607 skb->dev = ap->local->apdev;
608 skb_pull(skb, hostap_80211_get_hdrlen(fc));
609 skb->pkt_type = PACKET_OTHERHOST;
610 skb->protocol = __constant_htons(ETH_P_802_2);
611 memset(skb->cb, 0, sizeof(skb->cb));
612 netif_rx(skb);
613}
614
615
616#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
617/* Called only as a tasklet (software IRQ) */
618static void hostap_ap_tx_cb_auth(struct sk_buff *skb, int ok, void *data)
619{
620 struct ap_data *ap = data;
621 struct net_device *dev = ap->local->dev;
d041674d 622 struct ieee80211_hdr_4addr *hdr;
ff1d2767
JM		 623 u16 fc, *pos, auth_alg, auth_transaction, status;
624 struct sta_info *sta = NULL;
625 char *txt = NULL;
626
627 if (ap->local->hostapd) {
628 dev_kfree_skb(skb);
629 return;
630 }
631
d041674d 632 hdr = (struct ieee80211_hdr_4addr *) skb->data;
c0f72ca8 633 fc = le16_to_cpu(hdr->frame_ctl);
4339d328
JM		 634 if (WLAN_FC_GET_TYPE(fc) != IEEE80211_FTYPE_MGMT ||
635 WLAN_FC_GET_STYPE(fc) != IEEE80211_STYPE_AUTH ||
ff1d2767
JM		 636 skb->len < IEEE80211_MGMT_HDR_LEN + 6) {
637 printk(KERN_DEBUG "%s: hostap_ap_tx_cb_auth received invalid "
638 "frame\n", dev->name);
639 dev_kfree_skb(skb);
640 return;
641 }
642
643 pos = (u16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
644 auth_alg = le16_to_cpu(*pos++);
645 auth_transaction = le16_to_cpu(*pos++);
646 status = le16_to_cpu(*pos++);
647
648 if (!ok) {
649 txt = "frame was not ACKed";
650 goto done;
651 }
652
653 spin_lock(&ap->sta_table_lock);
654 sta = ap_get_sta(ap, hdr->addr1);
655 if (sta)
656 atomic_inc(&sta->users);
657 spin_unlock(&ap->sta_table_lock);
658
659 if (!sta) {
660 txt = "STA not found";
661 goto done;
662 }
663
664 if (status == WLAN_STATUS_SUCCESS &&
665 ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 2) ||
666 (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 4))) {
667 txt = "STA authenticated";
668 sta->flags |= WLAN_STA_AUTH;
669 sta->last_auth = jiffies;
670 } else if (status != WLAN_STATUS_SUCCESS)
671 txt = "authentication failed";
672
673 done:
674 if (sta)
675 atomic_dec(&sta->users);
676 if (txt) {
677 PDEBUG(DEBUG_AP, "%s: " MACSTR " auth_cb - alg=%d trans#=%d "
678 "status=%d - %s\n",
679 dev->name, MAC2STR(hdr->addr1), auth_alg,
680 auth_transaction, status, txt);
681 }
682 dev_kfree_skb(skb);
683}
684
685
686/* Called only as a tasklet (software IRQ) */
687static void hostap_ap_tx_cb_assoc(struct sk_buff *skb, int ok, void *data)
688{
689 struct ap_data *ap = data;
690 struct net_device *dev = ap->local->dev;
d041674d 691 struct ieee80211_hdr_4addr *hdr;
ff1d2767
JM		 692 u16 fc, *pos, status;
693 struct sta_info *sta = NULL;
694 char *txt = NULL;
695
696 if (ap->local->hostapd) {
697 dev_kfree_skb(skb);
698 return;
699 }
700
d041674d 701 hdr = (struct ieee80211_hdr_4addr *) skb->data;
c0f72ca8 702 fc = le16_to_cpu(hdr->frame_ctl);
4339d328
JM		 703 if (WLAN_FC_GET_TYPE(fc) != IEEE80211_FTYPE_MGMT ||
704 (WLAN_FC_GET_STYPE(fc) != IEEE80211_STYPE_ASSOC_RESP &&
705 WLAN_FC_GET_STYPE(fc) != IEEE80211_STYPE_REASSOC_RESP) ||
ff1d2767
JM		 706 skb->len < IEEE80211_MGMT_HDR_LEN + 4) {
707 printk(KERN_DEBUG "%s: hostap_ap_tx_cb_assoc received invalid "
708 "frame\n", dev->name);
709 dev_kfree_skb(skb);
710 return;
711 }
712
713 if (!ok) {
714 txt = "frame was not ACKed";
715 goto done;
716 }
717
718 spin_lock(&ap->sta_table_lock);
719 sta = ap_get_sta(ap, hdr->addr1);
720 if (sta)
721 atomic_inc(&sta->users);
722 spin_unlock(&ap->sta_table_lock);
723
724 if (!sta) {
725 txt = "STA not found";
726 goto done;
727 }
728
729 pos = (u16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
730 pos++;
731 status = le16_to_cpu(*pos++);
732 if (status == WLAN_STATUS_SUCCESS) {
733 if (!(sta->flags & WLAN_STA_ASSOC))
734 hostap_event_new_sta(dev, sta);
735 txt = "STA associated";
736 sta->flags |= WLAN_STA_ASSOC;
737 sta->last_assoc = jiffies;
738 } else
739 txt = "association failed";
740
741 done:
742 if (sta)
743 atomic_dec(&sta->users);
744 if (txt) {
745 PDEBUG(DEBUG_AP, "%s: " MACSTR " assoc_cb - %s\n",
746 dev->name, MAC2STR(hdr->addr1), txt);
747 }
748 dev_kfree_skb(skb);
749}
750
751/* Called only as a tasklet (software IRQ); TX callback for poll frames used
752 * in verifying whether the STA is still present. */
753static void hostap_ap_tx_cb_poll(struct sk_buff *skb, int ok, void *data)
754{
755 struct ap_data *ap = data;
d041674d 756 struct ieee80211_hdr_4addr *hdr;
ff1d2767
JM		 757 struct sta_info *sta;
758
759 if (skb->len < 24)
760 goto fail;
d041674d 761 hdr = (struct ieee80211_hdr_4addr *) skb->data;
ff1d2767
JM		 762 if (ok) {
763 spin_lock(&ap->sta_table_lock);
764 sta = ap_get_sta(ap, hdr->addr1);
765 if (sta)
766 sta->flags &= ~WLAN_STA_PENDING_POLL;
767 spin_unlock(&ap->sta_table_lock);
768 } else {
769 PDEBUG(DEBUG_AP, "%s: STA " MACSTR " did not ACK activity "
770 "poll frame\n", ap->local->dev->name,
771 MAC2STR(hdr->addr1));
772 }
773
774 fail:
775 dev_kfree_skb(skb);
776}
777#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
778
779
780void hostap_init_data(local_info_t *local)
781{
782 struct ap_data *ap = local->ap;
783
784 if (ap == NULL) {
785 printk(KERN_WARNING "hostap_init_data: ap == NULL\n");
786 return;
787 }
788 memset(ap, 0, sizeof(struct ap_data));
789 ap->local = local;
790
791 ap->ap_policy = GET_INT_PARM(other_ap_policy, local->card_idx);
792 ap->bridge_packets = GET_INT_PARM(ap_bridge_packets, local->card_idx);
793 ap->max_inactivity =
794 GET_INT_PARM(ap_max_inactivity, local->card_idx) * HZ;
795 ap->autom_ap_wds = GET_INT_PARM(autom_ap_wds, local->card_idx);
796
797 spin_lock_init(&ap->sta_table_lock);
798 INIT_LIST_HEAD(&ap->sta_list);
799
800 /* Initialize task queue structure for AP management */
c4028958 801 INIT_WORK(&local->ap->add_sta_proc_queue, handle_add_proc_queue);
ff1d2767
JM		 802
803 ap->tx_callback_idx =
804 hostap_tx_callback_register(local, hostap_ap_tx_cb, ap);
805 if (ap->tx_callback_idx == 0)
806 printk(KERN_WARNING "%s: failed to register TX callback for "
807 "AP\n", local->dev->name);
808#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
c4028958 809 INIT_WORK(&local->ap->wds_oper_queue, handle_wds_oper_queue);
ff1d2767
JM		 810
811 ap->tx_callback_auth =
812 hostap_tx_callback_register(local, hostap_ap_tx_cb_auth, ap);
813 ap->tx_callback_assoc =
814 hostap_tx_callback_register(local, hostap_ap_tx_cb_assoc, ap);
815 ap->tx_callback_poll =
816 hostap_tx_callback_register(local, hostap_ap_tx_cb_poll, ap);
817 if (ap->tx_callback_auth == 0 || ap->tx_callback_assoc == 0 ||
818 ap->tx_callback_poll == 0)
819 printk(KERN_WARNING "%s: failed to register TX callback for "
820 "AP\n", local->dev->name);
821
822 spin_lock_init(&ap->mac_restrictions.lock);
823 INIT_LIST_HEAD(&ap->mac_restrictions.mac_list);
824#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
825
826 ap->initialized = 1;
827}
828
829
830void hostap_init_ap_proc(local_info_t *local)
831{
832 struct ap_data *ap = local->ap;
833
834 ap->proc = local->proc;
835 if (ap->proc == NULL)
836 return;
837
838#ifndef PRISM2_NO_PROCFS_DEBUG
839 create_proc_read_entry("ap_debug", 0, ap->proc,
840 ap_debug_proc_read, ap);
841#endif /* PRISM2_NO_PROCFS_DEBUG */
842
843#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
844 create_proc_read_entry("ap_control", 0, ap->proc,
845 ap_control_proc_read, ap);
846 create_proc_read_entry("ap", 0, ap->proc,
847 prism2_ap_proc_read, ap);
848#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
849
850}
851
852
853void hostap_free_data(struct ap_data *ap)
854{
c1505731 855 struct sta_info *n, *sta;
ff1d2767
JM		 856
857 if (ap == NULL || !ap->initialized) {
858 printk(KERN_DEBUG "hostap_free_data: ap has not yet been "
859 "initialized - skip resource freeing\n");
860 return;
861 }
862
863#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
864 if (ap->crypt)
865 ap->crypt->deinit(ap->crypt_priv);
866 ap->crypt = ap->crypt_priv = NULL;
867#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
868
c1505731 869 list_for_each_entry_safe(sta, n, &ap->sta_list, list) {
ff1d2767
JM		 870 ap_sta_hash_del(ap, sta);
871 list_del(&sta->list);
872 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
873 hostap_event_expired_sta(sta->local->dev, sta);
874 ap_free_sta(ap, sta);
875 }
876
877#ifndef PRISM2_NO_PROCFS_DEBUG
878 if (ap->proc != NULL) {
879 remove_proc_entry("ap_debug", ap->proc);
880 }
881#endif /* PRISM2_NO_PROCFS_DEBUG */
882
883#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
884 if (ap->proc != NULL) {
885 remove_proc_entry("ap", ap->proc);
886 remove_proc_entry("ap_control", ap->proc);
887 }
888 ap_control_flush_macs(&ap->mac_restrictions);
889#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
890
891 ap->initialized = 0;
892}
893
894
895/* caller should have mutex for AP STA list handling */
896static struct sta_info* ap_get_sta(struct ap_data *ap, u8 *sta)
897{
898 struct sta_info *s;
899
900 s = ap->sta_hash[STA_HASH(sta)];
901 while (s != NULL && memcmp(s->addr, sta, ETH_ALEN) != 0)
902 s = s->hnext;
903 return s;
904}
905
906
907#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
908
909/* Called from timer handler and from scheduled AP queue handlers */
910static void prism2_send_mgmt(struct net_device *dev,
4339d328 911 u16 type_subtype, char *body,
ff1d2767
JM		 912 int body_len, u8 *addr, u16 tx_cb_idx)
913{
914 struct hostap_interface *iface;
915 local_info_t *local;
d041674d 916 struct ieee80211_hdr_4addr *hdr;
ff1d2767
JM		 917 u16 fc;
918 struct sk_buff *skb;
919 struct hostap_skb_tx_data *meta;
920 int hdrlen;
921
922 iface = netdev_priv(dev);
923 local = iface->local;
924 dev = local->dev; /* always use master radio device */
925 iface = netdev_priv(dev);
926
927 if (!(dev->flags & IFF_UP)) {
928 PDEBUG(DEBUG_AP, "%s: prism2_send_mgmt - device is not UP - "
929 "cannot send frame\n", dev->name);
930 return;
931 }
932
933 skb = dev_alloc_skb(sizeof(*hdr) + body_len);
934 if (skb == NULL) {
935 PDEBUG(DEBUG_AP, "%s: prism2_send_mgmt failed to allocate "
936 "skb\n", dev->name);
937 return;
938 }
939
4339d328 940 fc = type_subtype;
ff1d2767 941 hdrlen = hostap_80211_get_hdrlen(fc);
d041674d 942 hdr = (struct ieee80211_hdr_4addr *) skb_put(skb, hdrlen);
ff1d2767
JM		 943 if (body)
944 memcpy(skb_put(skb, body_len), body, body_len);
945
946 memset(hdr, 0, hdrlen);
947
948 /* FIX: ctrl::ack sending used special HFA384X_TX_CTRL_802_11
949 * tx_control instead of using local->tx_control */
950
951
952 memcpy(hdr->addr1, addr, ETH_ALEN); /* DA / RA */
4339d328 953 if (WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_DATA) {
b2f4a2e3 954 fc |= IEEE80211_FCTL_FROMDS;
ff1d2767
JM		 955 memcpy(hdr->addr2, dev->dev_addr, ETH_ALEN); /* BSSID */
956 memcpy(hdr->addr3, dev->dev_addr, ETH_ALEN); /* SA */
4339d328 957 } else if (WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_CTL) {
ff1d2767
JM		 958 /* control:ACK does not have addr2 or addr3 */
959 memset(hdr->addr2, 0, ETH_ALEN);
960 memset(hdr->addr3, 0, ETH_ALEN);
961 } else {
962 memcpy(hdr->addr2, dev->dev_addr, ETH_ALEN); /* SA */
963 memcpy(hdr->addr3, dev->dev_addr, ETH_ALEN); /* BSSID */
964 }
965
c0f72ca8 966 hdr->frame_ctl = cpu_to_le16(fc);
ff1d2767
JM		 967
968 meta = (struct hostap_skb_tx_data *) skb->cb;
969 memset(meta, 0, sizeof(*meta));
970 meta->magic = HOSTAP_SKB_TX_DATA_MAGIC;
971 meta->iface = iface;
972 meta->tx_cb_idx = tx_cb_idx;
973
974 skb->dev = dev;
459a98ed 975 skb_reset_mac_header(skb);
c1d2bbe1 976 skb_reset_network_header(skb);
ff1d2767
JM		 977 dev_queue_xmit(skb);
978}
979#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
980
981
982static int prism2_sta_proc_read(char *page, char **start, off_t off,
983 int count, int *eof, void *data)
984{
985 char *p = page;
986 struct sta_info *sta = (struct sta_info *) data;
987 int i;
988
989 /* FIX: possible race condition.. the STA data could have just expired,
990 * but proc entry was still here so that the read could have started;
991 * some locking should be done here.. */
992
993 if (off != 0) {
994 *eof = 1;
995 return 0;
996 }
997
998 p += sprintf(p, "%s=" MACSTR "\nusers=%d\naid=%d\n"
999 "flags=0x%04x%s%s%s%s%s%s%s\n"
1000 "capability=0x%02x\nlisten_interval=%d\nsupported_rates=",
1001 sta->ap ? "AP" : "STA",
1002 MAC2STR(sta->addr), atomic_read(&sta->users), sta->aid,
1003 sta->flags,
1004 sta->flags & WLAN_STA_AUTH ? " AUTH" : "",
1005 sta->flags & WLAN_STA_ASSOC ? " ASSOC" : "",
1006 sta->flags & WLAN_STA_PS ? " PS" : "",
1007 sta->flags & WLAN_STA_TIM ? " TIM" : "",
1008 sta->flags & WLAN_STA_PERM ? " PERM" : "",
1009 sta->flags & WLAN_STA_AUTHORIZED ? " AUTHORIZED" : "",
1010 sta->flags & WLAN_STA_PENDING_POLL ? " POLL" : "",
1011 sta->capability, sta->listen_interval);
1012 /* supported_rates: 500 kbit/s units with msb ignored */
1013 for (i = 0; i < sizeof(sta->supported_rates); i++)
1014 if (sta->supported_rates[i] != 0)
1015 p += sprintf(p, "%d%sMbps ",
1016 (sta->supported_rates[i] & 0x7f) / 2,
1017 sta->supported_rates[i] & 1 ? ".5" : "");
1018 p += sprintf(p, "\njiffies=%lu\nlast_auth=%lu\nlast_assoc=%lu\n"
1019 "last_rx=%lu\nlast_tx=%lu\nrx_packets=%lu\n"
1020 "tx_packets=%lu\n"
1021 "rx_bytes=%lu\ntx_bytes=%lu\nbuffer_count=%d\n"
1022 "last_rx: silence=%d dBm signal=%d dBm rate=%d%s Mbps\n"
1023 "tx_rate=%d\ntx[1M]=%d\ntx[2M]=%d\ntx[5.5M]=%d\n"
1024 "tx[11M]=%d\n"
1025 "rx[1M]=%d\nrx[2M]=%d\nrx[5.5M]=%d\nrx[11M]=%d\n",
1026 jiffies, sta->last_auth, sta->last_assoc, sta->last_rx,
1027 sta->last_tx,
1028 sta->rx_packets, sta->tx_packets, sta->rx_bytes,
1029 sta->tx_bytes, skb_queue_len(&sta->tx_buf),
1030 sta->last_rx_silence,
1031 sta->last_rx_signal, sta->last_rx_rate / 10,
1032 sta->last_rx_rate % 10 ? ".5" : "",
1033 sta->tx_rate, sta->tx_count[0], sta->tx_count[1],
1034 sta->tx_count[2], sta->tx_count[3], sta->rx_count[0],
1035 sta->rx_count[1], sta->rx_count[2], sta->rx_count[3]);
1036 if (sta->crypt && sta->crypt->ops && sta->crypt->ops->print_stats)
1037 p = sta->crypt->ops->print_stats(p, sta->crypt->priv);
1038#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1039 if (sta->ap) {
1040 if (sta->u.ap.channel >= 0)
1041 p += sprintf(p, "channel=%d\n", sta->u.ap.channel);
1042 p += sprintf(p, "ssid=");
1043 for (i = 0; i < sta->u.ap.ssid_len; i++)
1044 p += sprintf(p, ((sta->u.ap.ssid[i] >= 32 &&
1045 sta->u.ap.ssid[i] < 127) ?
1046 "%c" : "<%02x>"),
1047 sta->u.ap.ssid[i]);
1048 p += sprintf(p, "\n");
1049 }
1050#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1051
1052 return (p - page);
1053}
1054
1055
c4028958 1056static void handle_add_proc_queue(struct work_struct *work)
ff1d2767 1057{
c4028958
DH		 1058 struct ap_data *ap = container_of(work, struct ap_data,
1059 add_sta_proc_queue);
ff1d2767
JM		 1060 struct sta_info *sta;
1061 char name[20];
1062 struct add_sta_proc_data *entry, *prev;
1063
1064 entry = ap->add_sta_proc_entries;
1065 ap->add_sta_proc_entries = NULL;
1066
1067 while (entry) {
1068 spin_lock_bh(&ap->sta_table_lock);
1069 sta = ap_get_sta(ap, entry->addr);
1070 if (sta)
1071 atomic_inc(&sta->users);
1072 spin_unlock_bh(&ap->sta_table_lock);
1073
1074 if (sta) {
1075 sprintf(name, MACSTR, MAC2STR(sta->addr));
1076 sta->proc = create_proc_read_entry(
1077 name, 0, ap->proc,
1078 prism2_sta_proc_read, sta);
1079
1080 atomic_dec(&sta->users);
1081 }
1082
1083 prev = entry;
1084 entry = entry->next;
1085 kfree(prev);
1086 }
1087}
1088
1089
1090static struct sta_info * ap_add_sta(struct ap_data *ap, u8 *addr)
1091{
1092 struct sta_info *sta;
1093
b0471bb7 1094 sta = kzalloc(sizeof(struct sta_info), GFP_ATOMIC);
ff1d2767
JM		 1095 if (sta == NULL) {
1096 PDEBUG(DEBUG_AP, "AP: kmalloc failed\n");
1097 return NULL;
1098 }
1099
1100 /* initialize STA info data */
ff1d2767
JM		 1101 sta->local = ap->local;
1102 skb_queue_head_init(&sta->tx_buf);
1103 memcpy(sta->addr, addr, ETH_ALEN);
1104
1105 atomic_inc(&sta->users);
1106 spin_lock_bh(&ap->sta_table_lock);
1107 list_add(&sta->list, &ap->sta_list);
1108 ap->num_sta++;
1109 ap_sta_hash_add(ap, sta);
1110 spin_unlock_bh(&ap->sta_table_lock);
1111
1112 if (ap->proc) {
1113 struct add_sta_proc_data *entry;
1114 /* schedule a non-interrupt context process to add a procfs
1115 * entry for the STA since procfs code use GFP_KERNEL */
1116 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
1117 if (entry) {
1118 memcpy(entry->addr, sta->addr, ETH_ALEN);
1119 entry->next = ap->add_sta_proc_entries;
1120 ap->add_sta_proc_entries = entry;
1121 schedule_work(&ap->add_sta_proc_queue);
1122 } else
1123 printk(KERN_DEBUG "Failed to add STA proc data\n");
1124 }
1125
1126#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1127 init_timer(&sta->timer);
1128 sta->timer.expires = jiffies + ap->max_inactivity;
1129 sta->timer.data = (unsigned long) sta;
1130 sta->timer.function = ap_handle_timer;
1131 if (!ap->local->hostapd)
1132 add_timer(&sta->timer);
1133#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1134
1135 return sta;
1136}
1137
1138
1139static int ap_tx_rate_ok(int rateidx, struct sta_info *sta,
1140 local_info_t *local)
1141{
1142 if (rateidx > sta->tx_max_rate ||
1143 !(sta->tx_supp_rates & (1 << rateidx)))
1144 return 0;
1145
1146 if (local->tx_rate_control != 0 &&
1147 !(local->tx_rate_control & (1 << rateidx)))
1148 return 0;
1149
1150 return 1;
1151}
1152
1153
1154static void prism2_check_tx_rates(struct sta_info *sta)
1155{
1156 int i;
1157
1158 sta->tx_supp_rates = 0;
1159 for (i = 0; i < sizeof(sta->supported_rates); i++) {
1160 if ((sta->supported_rates[i] & 0x7f) == 2)
1161 sta->tx_supp_rates |= WLAN_RATE_1M;
1162 if ((sta->supported_rates[i] & 0x7f) == 4)
1163 sta->tx_supp_rates |= WLAN_RATE_2M;
1164 if ((sta->supported_rates[i] & 0x7f) == 11)
1165 sta->tx_supp_rates |= WLAN_RATE_5M5;
1166 if ((sta->supported_rates[i] & 0x7f) == 22)
1167 sta->tx_supp_rates |= WLAN_RATE_11M;
1168 }
1169 sta->tx_max_rate = sta->tx_rate = sta->tx_rate_idx = 0;
1170 if (sta->tx_supp_rates & WLAN_RATE_1M) {
1171 sta->tx_max_rate = 0;
1172 if (ap_tx_rate_ok(0, sta, sta->local)) {
1173 sta->tx_rate = 10;
1174 sta->tx_rate_idx = 0;
1175 }
1176 }
1177 if (sta->tx_supp_rates & WLAN_RATE_2M) {
1178 sta->tx_max_rate = 1;
1179 if (ap_tx_rate_ok(1, sta, sta->local)) {
1180 sta->tx_rate = 20;
1181 sta->tx_rate_idx = 1;
1182 }
1183 }
1184 if (sta->tx_supp_rates & WLAN_RATE_5M5) {
1185 sta->tx_max_rate = 2;
1186 if (ap_tx_rate_ok(2, sta, sta->local)) {
1187 sta->tx_rate = 55;
1188 sta->tx_rate_idx = 2;
1189 }
1190 }
1191 if (sta->tx_supp_rates & WLAN_RATE_11M) {
1192 sta->tx_max_rate = 3;
1193 if (ap_tx_rate_ok(3, sta, sta->local)) {
1194 sta->tx_rate = 110;
1195 sta->tx_rate_idx = 3;
1196 }
1197 }
1198}
1199
1200
1201#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1202
1203static void ap_crypt_init(struct ap_data *ap)
1204{
62fe7e37 1205 ap->crypt = ieee80211_get_crypto_ops("WEP");
ff1d2767
JM		 1206
1207 if (ap->crypt) {
1208 if (ap->crypt->init) {
1209 ap->crypt_priv = ap->crypt->init(0);
1210 if (ap->crypt_priv == NULL)
1211 ap->crypt = NULL;
1212 else {
1213 u8 key[WEP_KEY_LEN];
1214 get_random_bytes(key, WEP_KEY_LEN);
1215 ap->crypt->set_key(key, WEP_KEY_LEN, NULL,
1216 ap->crypt_priv);
1217 }
1218 }
1219 }
1220
1221 if (ap->crypt == NULL) {
1222 printk(KERN_WARNING "AP could not initialize WEP: load module "
62fe7e37 1223 "ieee80211_crypt_wep.ko\n");
ff1d2767
JM		 1224 }
1225}
1226
1227
1228/* Generate challenge data for shared key authentication. IEEE 802.11 specifies
1229 * that WEP algorithm is used for generating challange. This should be unique,
1230 * but otherwise there is not really need for randomness etc. Initialize WEP
1231 * with pseudo random key and then use increasing IV to get unique challenge
1232 * streams.
1233 *
1234 * Called only as a scheduled task for pending AP frames.
1235 */
1236static char * ap_auth_make_challenge(struct ap_data *ap)
1237{
1238 char *tmpbuf;
1239 struct sk_buff *skb;
1240
1241 if (ap->crypt == NULL) {
1242 ap_crypt_init(ap);
1243 if (ap->crypt == NULL)
1244 return NULL;
1245 }
1246
5cbded58 1247 tmpbuf = kmalloc(WLAN_AUTH_CHALLENGE_LEN, GFP_ATOMIC);
ff1d2767
JM		 1248 if (tmpbuf == NULL) {
1249 PDEBUG(DEBUG_AP, "AP: kmalloc failed for challenge\n");
1250 return NULL;
1251 }
1252
1253 skb = dev_alloc_skb(WLAN_AUTH_CHALLENGE_LEN +
5bfc819b
JK		 1254 ap->crypt->extra_mpdu_prefix_len +
1255 ap->crypt->extra_mpdu_postfix_len);
ff1d2767
JM		 1256 if (skb == NULL) {
1257 kfree(tmpbuf);
1258 return NULL;
1259 }
1260
5bfc819b 1261 skb_reserve(skb, ap->crypt->extra_mpdu_prefix_len);
ff1d2767
JM		 1262 memset(skb_put(skb, WLAN_AUTH_CHALLENGE_LEN), 0,
1263 WLAN_AUTH_CHALLENGE_LEN);
1264 if (ap->crypt->encrypt_mpdu(skb, 0, ap->crypt_priv)) {
1265 dev_kfree_skb(skb);
1266 kfree(tmpbuf);
1267 return NULL;
1268 }
1269
d626f62b
ACM		 1270 skb_copy_from_linear_data_offset(skb, ap->crypt->extra_mpdu_prefix_len,
1271 tmpbuf, WLAN_AUTH_CHALLENGE_LEN);
ff1d2767
JM		 1272 dev_kfree_skb(skb);
1273
1274 return tmpbuf;
1275}
1276
1277
1278/* Called only as a scheduled task for pending AP frames. */
1279static void handle_authen(local_info_t *local, struct sk_buff *skb,
1280 struct hostap_80211_rx_status *rx_stats)
1281{
1282 struct net_device *dev = local->dev;
d041674d 1283 struct ieee80211_hdr_4addr *hdr = (struct ieee80211_hdr_4addr *) skb->data;
ff1d2767
JM		 1284 size_t hdrlen;
1285 struct ap_data *ap = local->ap;
1286 char body[8 + WLAN_AUTH_CHALLENGE_LEN], *challenge = NULL;
1287 int len, olen;
1288 u16 auth_alg, auth_transaction, status_code, *pos;
1289 u16 resp = WLAN_STATUS_SUCCESS, fc;
1290 struct sta_info *sta = NULL;
62fe7e37 1291 struct ieee80211_crypt_data *crypt;
ff1d2767
JM		 1292 char *txt = "";
1293
1294 len = skb->len - IEEE80211_MGMT_HDR_LEN;
1295
c0f72ca8 1296 fc = le16_to_cpu(hdr->frame_ctl);
ff1d2767
JM		 1297 hdrlen = hostap_80211_get_hdrlen(fc);
1298
1299 if (len < 6) {
1300 PDEBUG(DEBUG_AP, "%s: handle_authen - too short payload "
1301 "(len=%d) from " MACSTR "\n", dev->name, len,
1302 MAC2STR(hdr->addr2));
1303 return;
1304 }
1305
1306 spin_lock_bh(&local->ap->sta_table_lock);
1307 sta = ap_get_sta(local->ap, hdr->addr2);
1308 if (sta)
1309 atomic_inc(&sta->users);
1310 spin_unlock_bh(&local->ap->sta_table_lock);
1311
1312 if (sta && sta->crypt)
1313 crypt = sta->crypt;
1314 else {
1315 int idx = 0;
1316 if (skb->len >= hdrlen + 3)
1317 idx = skb->data[hdrlen + 3] >> 6;
1318 crypt = local->crypt[idx];
1319 }
1320
1321 pos = (u16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
1322 auth_alg = __le16_to_cpu(*pos);
1323 pos++;
1324 auth_transaction = __le16_to_cpu(*pos);
1325 pos++;
1326 status_code = __le16_to_cpu(*pos);
1327 pos++;
1328
1329 if (memcmp(dev->dev_addr, hdr->addr2, ETH_ALEN) == 0 ||
1330 ap_control_mac_deny(&ap->mac_restrictions, hdr->addr2)) {
1331 txt = "authentication denied";
1332 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1333 goto fail;
1334 }
1335
1336 if (((local->auth_algs & PRISM2_AUTH_OPEN) &&
1337 auth_alg == WLAN_AUTH_OPEN) ||
1338 ((local->auth_algs & PRISM2_AUTH_SHARED_KEY) &&
1339 crypt && auth_alg == WLAN_AUTH_SHARED_KEY)) {
1340 } else {
1341 txt = "unsupported algorithm";
1342 resp = WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG;
1343 goto fail;
1344 }
1345
1346 if (len >= 8) {
1347 u8 *u = (u8 *) pos;
1348 if (*u == WLAN_EID_CHALLENGE) {
1349 if (*(u + 1) != WLAN_AUTH_CHALLENGE_LEN) {
1350 txt = "invalid challenge len";
1351 resp = WLAN_STATUS_CHALLENGE_FAIL;
1352 goto fail;
1353 }
1354 if (len - 8 < WLAN_AUTH_CHALLENGE_LEN) {
1355 txt = "challenge underflow";
1356 resp = WLAN_STATUS_CHALLENGE_FAIL;
1357 goto fail;
1358 }
1359 challenge = (char *) (u + 2);
1360 }
1361 }
1362
1363 if (sta && sta->ap) {
1364 if (time_after(jiffies, sta->u.ap.last_beacon +
1365 (10 * sta->listen_interval * HZ) / 1024)) {
1366 PDEBUG(DEBUG_AP, "%s: no beacons received for a while,"
1367 " assuming AP " MACSTR " is now STA\n",
1368 dev->name, MAC2STR(sta->addr));
1369 sta->ap = 0;
1370 sta->flags = 0;
1371 sta->u.sta.challenge = NULL;
1372 } else {
1373 txt = "AP trying to authenticate?";
1374 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1375 goto fail;
1376 }
1377 }
1378
1379 if ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 1) ||
1380 (auth_alg == WLAN_AUTH_SHARED_KEY &&
1381 (auth_transaction == 1 ||
1382 (auth_transaction == 3 && sta != NULL &&
1383 sta->u.sta.challenge != NULL)))) {
1384 } else {
1385 txt = "unknown authentication transaction number";
1386 resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION;
1387 goto fail;
1388 }
1389
1390 if (sta == NULL) {
1391 txt = "new STA";
1392
1393 if (local->ap->num_sta >= MAX_STA_COUNT) {
1394 /* FIX: might try to remove some old STAs first? */
1395 txt = "no more room for new STAs";
1396 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1397 goto fail;
1398 }
1399
1400 sta = ap_add_sta(local->ap, hdr->addr2);
1401 if (sta == NULL) {
1402 txt = "ap_add_sta failed";
1403 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1404 goto fail;
1405 }
1406 }
1407
1408 switch (auth_alg) {
1409 case WLAN_AUTH_OPEN:
1410 txt = "authOK";
1411 /* IEEE 802.11 standard is not completely clear about
1412 * whether STA is considered authenticated after
1413 * authentication OK frame has been send or after it
1414 * has been ACKed. In order to reduce interoperability
1415 * issues, mark the STA authenticated before ACK. */
1416 sta->flags |= WLAN_STA_AUTH;
1417 break;
1418
1419 case WLAN_AUTH_SHARED_KEY:
1420 if (auth_transaction == 1) {
1421 if (sta->u.sta.challenge == NULL) {
1422 sta->u.sta.challenge =
1423 ap_auth_make_challenge(local->ap);
1424 if (sta->u.sta.challenge == NULL) {
1425 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1426 goto fail;
1427 }
1428 }
1429 } else {
1430 if (sta->u.sta.challenge == NULL ||
1431 challenge == NULL ||
1432 memcmp(sta->u.sta.challenge, challenge,
1433 WLAN_AUTH_CHALLENGE_LEN) != 0 ||
831a179f 1434 !(fc & IEEE80211_FCTL_PROTECTED)) {
ff1d2767
JM		 1435 txt = "challenge response incorrect";
1436 resp = WLAN_STATUS_CHALLENGE_FAIL;
1437 goto fail;
1438 }
1439
1440 txt = "challenge OK - authOK";
1441 /* IEEE 802.11 standard is not completely clear about
1442 * whether STA is considered authenticated after
1443 * authentication OK frame has been send or after it
1444 * has been ACKed. In order to reduce interoperability
1445 * issues, mark the STA authenticated before ACK. */
1446 sta->flags |= WLAN_STA_AUTH;
1447 kfree(sta->u.sta.challenge);
1448 sta->u.sta.challenge = NULL;
1449 }
1450 break;
1451 }
1452
1453 fail:
1454 pos = (u16 *) body;
1455 *pos = cpu_to_le16(auth_alg);
1456 pos++;
1457 *pos = cpu_to_le16(auth_transaction + 1);
1458 pos++;
1459 *pos = cpu_to_le16(resp); /* status_code */
1460 pos++;
1461 olen = 6;
1462
1463 if (resp == WLAN_STATUS_SUCCESS && sta != NULL &&
1464 sta->u.sta.challenge != NULL &&
1465 auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 1) {
1466 u8 *tmp = (u8 *) pos;
1467 *tmp++ = WLAN_EID_CHALLENGE;
1468 *tmp++ = WLAN_AUTH_CHALLENGE_LEN;
1469 pos++;
1470 memcpy(pos, sta->u.sta.challenge, WLAN_AUTH_CHALLENGE_LEN);
1471 olen += 2 + WLAN_AUTH_CHALLENGE_LEN;
1472 }
1473
4339d328 1474 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_AUTH,
ff1d2767
JM		 1475 body, olen, hdr->addr2, ap->tx_callback_auth);
1476
1477 if (sta) {
1478 sta->last_rx = jiffies;
1479 atomic_dec(&sta->users);
1480 }
1481
1482 if (resp) {
1483 PDEBUG(DEBUG_AP, "%s: " MACSTR " auth (alg=%d trans#=%d "
1484 "stat=%d len=%d fc=%04x) ==> %d (%s)\n",
1485 dev->name, MAC2STR(hdr->addr2), auth_alg,
1486 auth_transaction, status_code, len, fc, resp, txt);
1487 }
1488}
1489
1490
1491/* Called only as a scheduled task for pending AP frames. */
1492static void handle_assoc(local_info_t *local, struct sk_buff *skb,
1493 struct hostap_80211_rx_status *rx_stats, int reassoc)
1494{
1495 struct net_device *dev = local->dev;
d041674d 1496 struct ieee80211_hdr_4addr *hdr = (struct ieee80211_hdr_4addr *) skb->data;
ff1d2767
JM		 1497 char body[12], *p, *lpos;
1498 int len, left;
1499 u16 *pos;
1500 u16 resp = WLAN_STATUS_SUCCESS;
1501 struct sta_info *sta = NULL;
1502 int send_deauth = 0;
1503 char *txt = "";
1504 u8 prev_ap[ETH_ALEN];
1505
1506 left = len = skb->len - IEEE80211_MGMT_HDR_LEN;
1507
1508 if (len < (reassoc ? 10 : 4)) {
1509 PDEBUG(DEBUG_AP, "%s: handle_assoc - too short payload "
1510 "(len=%d, reassoc=%d) from " MACSTR "\n",
1511 dev->name, len, reassoc, MAC2STR(hdr->addr2));
1512 return;
1513 }
1514
1515 spin_lock_bh(&local->ap->sta_table_lock);
1516 sta = ap_get_sta(local->ap, hdr->addr2);
1517 if (sta == NULL || (sta->flags & WLAN_STA_AUTH) == 0) {
1518 spin_unlock_bh(&local->ap->sta_table_lock);
1519 txt = "trying to associate before authentication";
1520 send_deauth = 1;
1521 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1522 sta = NULL; /* do not decrement sta->users */
1523 goto fail;
1524 }
1525 atomic_inc(&sta->users);
1526 spin_unlock_bh(&local->ap->sta_table_lock);
1527
1528 pos = (u16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
1529 sta->capability = __le16_to_cpu(*pos);
1530 pos++; left -= 2;
1531 sta->listen_interval = __le16_to_cpu(*pos);
1532 pos++; left -= 2;
1533
1534 if (reassoc) {
1535 memcpy(prev_ap, pos, ETH_ALEN);
1536 pos++; pos++; pos++; left -= 6;
1537 } else
1538 memset(prev_ap, 0, ETH_ALEN);
1539
1540 if (left >= 2) {
1541 unsigned int ileft;
1542 unsigned char *u = (unsigned char *) pos;
1543
1544 if (*u == WLAN_EID_SSID) {
1545 u++; left--;
1546 ileft = *u;
1547 u++; left--;
1548
1549 if (ileft > left || ileft > MAX_SSID_LEN) {
1550 txt = "SSID overflow";
1551 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1552 goto fail;
1553 }
1554
1555 if (ileft != strlen(local->essid) ||
1556 memcmp(local->essid, u, ileft) != 0) {
1557 txt = "not our SSID";
1558 resp = WLAN_STATUS_ASSOC_DENIED_UNSPEC;
1559 goto fail;
1560 }
1561
1562 u += ileft;
1563 left -= ileft;
1564 }
1565
1566 if (left >= 2 && *u == WLAN_EID_SUPP_RATES) {
1567 u++; left--;
1568 ileft = *u;
1569 u++; left--;
74fae82c 1570
ff1d2767
JM		 1571 if (ileft > left || ileft == 0 ||
1572 ileft > WLAN_SUPP_RATES_MAX) {
1573 txt = "SUPP_RATES len error";
1574 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1575 goto fail;
1576 }
1577
1578 memset(sta->supported_rates, 0,
1579 sizeof(sta->supported_rates));
1580 memcpy(sta->supported_rates, u, ileft);
1581 prism2_check_tx_rates(sta);
1582
1583 u += ileft;
1584 left -= ileft;
1585 }
1586
1587 if (left > 0) {
1588 PDEBUG(DEBUG_AP, "%s: assoc from " MACSTR " with extra"
1589 " data (%d bytes) [",
1590 dev->name, MAC2STR(hdr->addr2), left);
1591 while (left > 0) {
1592 PDEBUG2(DEBUG_AP, "<%02x>", *u);
1593 u++; left--;
1594 }
1595 PDEBUG2(DEBUG_AP, "]\n");
1596 }
1597 } else {
1598 txt = "frame underflow";
1599 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1600 goto fail;
1601 }
1602
1603 /* get a unique AID */
1604 if (sta->aid > 0)
1605 txt = "OK, old AID";
1606 else {
1607 spin_lock_bh(&local->ap->sta_table_lock);
1608 for (sta->aid = 1; sta->aid <= MAX_AID_TABLE_SIZE; sta->aid++)
1609 if (local->ap->sta_aid[sta->aid - 1] == NULL)
1610 break;
1611 if (sta->aid > MAX_AID_TABLE_SIZE) {
1612 sta->aid = 0;
1613 spin_unlock_bh(&local->ap->sta_table_lock);
1614 resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
1615 txt = "no room for more AIDs";
1616 } else {
1617 local->ap->sta_aid[sta->aid - 1] = sta;
1618 spin_unlock_bh(&local->ap->sta_table_lock);
1619 txt = "OK, new AID";
1620 }
1621 }
1622
1623 fail:
1624 pos = (u16 *) body;
1625
1626 if (send_deauth) {
1627 *pos = __constant_cpu_to_le16(
1628 WLAN_REASON_STA_REQ_ASSOC_WITHOUT_AUTH);
1629 pos++;
1630 } else {
1631 /* FIX: CF-Pollable and CF-PollReq should be set to match the
1632 * values in beacons/probe responses */
1633 /* FIX: how about privacy and WEP? */
1634 /* capability */
1635 *pos = __constant_cpu_to_le16(WLAN_CAPABILITY_ESS);
1636 pos++;
1637
1638 /* status_code */
1639 *pos = __cpu_to_le16(resp);
1640 pos++;
1641
1642 *pos = __cpu_to_le16((sta && sta->aid > 0 ? sta->aid : 0) |
1643 BIT(14) | BIT(15)); /* AID */
1644 pos++;
1645
1646 /* Supported rates (Information element) */
1647 p = (char *) pos;
1648 *p++ = WLAN_EID_SUPP_RATES;
1649 lpos = p;
1650 *p++ = 0; /* len */
1651 if (local->tx_rate_control & WLAN_RATE_1M) {
1652 *p++ = local->basic_rates & WLAN_RATE_1M ? 0x82 : 0x02;
1653 (*lpos)++;
1654 }
1655 if (local->tx_rate_control & WLAN_RATE_2M) {
1656 *p++ = local->basic_rates & WLAN_RATE_2M ? 0x84 : 0x04;
1657 (*lpos)++;
1658 }
1659 if (local->tx_rate_control & WLAN_RATE_5M5) {
1660 *p++ = local->basic_rates & WLAN_RATE_5M5 ?
1661 0x8b : 0x0b;
1662 (*lpos)++;
1663 }
1664 if (local->tx_rate_control & WLAN_RATE_11M) {
1665 *p++ = local->basic_rates & WLAN_RATE_11M ?
1666 0x96 : 0x16;
1667 (*lpos)++;
1668 }
1669 pos = (u16 *) p;
1670 }
1671
4339d328
JM		 1672 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT |
1673 (send_deauth ? IEEE80211_STYPE_DEAUTH :
1674 (reassoc ? IEEE80211_STYPE_REASSOC_RESP :
1675 IEEE80211_STYPE_ASSOC_RESP)),
ff1d2767
JM		 1676 body, (u8 *) pos - (u8 *) body,
1677 hdr->addr2,
1678 send_deauth ? 0 : local->ap->tx_callback_assoc);
1679
1680 if (sta) {
1681 if (resp == WLAN_STATUS_SUCCESS) {
1682 sta->last_rx = jiffies;
1683 /* STA will be marked associated from TX callback, if
1684 * AssocResp is ACKed */
1685 }
1686 atomic_dec(&sta->users);
1687 }
1688
1689#if 0
1690 PDEBUG(DEBUG_AP, "%s: " MACSTR " %sassoc (len=%d prev_ap=" MACSTR
1691 ") => %d(%d) (%s)\n",
1692 dev->name, MAC2STR(hdr->addr2), reassoc ? "re" : "", len,
1693 MAC2STR(prev_ap), resp, send_deauth, txt);
1694#endif
1695}
1696
1697
1698/* Called only as a scheduled task for pending AP frames. */
1699static void handle_deauth(local_info_t *local, struct sk_buff *skb,
1700 struct hostap_80211_rx_status *rx_stats)
1701{
1702 struct net_device *dev = local->dev;
d041674d 1703 struct ieee80211_hdr_4addr *hdr = (struct ieee80211_hdr_4addr *) skb->data;
ff1d2767
JM		 1704 char *body = (char *) (skb->data + IEEE80211_MGMT_HDR_LEN);
1705 int len;
1706 u16 reason_code, *pos;
1707 struct sta_info *sta = NULL;
1708
1709 len = skb->len - IEEE80211_MGMT_HDR_LEN;
1710
1711 if (len < 2) {
1712 printk("handle_deauth - too short payload (len=%d)\n", len);
1713 return;
1714 }
1715
1716 pos = (u16 *) body;
1717 reason_code = __le16_to_cpu(*pos);
1718
1719 PDEBUG(DEBUG_AP, "%s: deauthentication: " MACSTR " len=%d, "
1720 "reason_code=%d\n", dev->name, MAC2STR(hdr->addr2), len,
1721 reason_code);
1722
1723 spin_lock_bh(&local->ap->sta_table_lock);
1724 sta = ap_get_sta(local->ap, hdr->addr2);
1725 if (sta != NULL) {
1726 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap)
1727 hostap_event_expired_sta(local->dev, sta);
1728 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
1729 }
1730 spin_unlock_bh(&local->ap->sta_table_lock);
1731 if (sta == NULL) {
1732 printk("%s: deauthentication from " MACSTR ", "
1733 "reason_code=%d, but STA not authenticated\n", dev->name,
1734 MAC2STR(hdr->addr2), reason_code);
1735 }
1736}
1737
1738
1739/* Called only as a scheduled task for pending AP frames. */
1740static void handle_disassoc(local_info_t *local, struct sk_buff *skb,
1741 struct hostap_80211_rx_status *rx_stats)
1742{
1743 struct net_device *dev = local->dev;
d041674d 1744 struct ieee80211_hdr_4addr *hdr = (struct ieee80211_hdr_4addr *) skb->data;
ff1d2767
JM		 1745 char *body = skb->data + IEEE80211_MGMT_HDR_LEN;
1746 int len;
1747 u16 reason_code, *pos;
1748 struct sta_info *sta = NULL;
1749
1750 len = skb->len - IEEE80211_MGMT_HDR_LEN;
1751
1752 if (len < 2) {
1753 printk("handle_disassoc - too short payload (len=%d)\n", len);
1754 return;
1755 }
1756
1757 pos = (u16 *) body;
1758 reason_code = __le16_to_cpu(*pos);
1759
1760 PDEBUG(DEBUG_AP, "%s: disassociation: " MACSTR " len=%d, "
1761 "reason_code=%d\n", dev->name, MAC2STR(hdr->addr2), len,
1762 reason_code);
1763
1764 spin_lock_bh(&local->ap->sta_table_lock);
1765 sta = ap_get_sta(local->ap, hdr->addr2);
1766 if (sta != NULL) {
1767 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap)
1768 hostap_event_expired_sta(local->dev, sta);
1769 sta->flags &= ~WLAN_STA_ASSOC;
1770 }
1771 spin_unlock_bh(&local->ap->sta_table_lock);
1772 if (sta == NULL) {
1773 printk("%s: disassociation from " MACSTR ", "
1774 "reason_code=%d, but STA not authenticated\n",
1775 dev->name, MAC2STR(hdr->addr2), reason_code);
1776 }
1777}
1778
1779
1780/* Called only as a scheduled task for pending AP frames. */
1781static void ap_handle_data_nullfunc(local_info_t *local,
d041674d 1782 struct ieee80211_hdr_4addr *hdr)
ff1d2767
JM		 1783{
1784 struct net_device *dev = local->dev;
1785
1786 /* some STA f/w's seem to require control::ACK frame for
1787 * data::nullfunc, but at least Prism2 station f/w version 0.8.0 does
1788 * not send this..
1789 * send control::ACK for the data::nullfunc */
1790
1791 printk(KERN_DEBUG "Sending control::ACK for data::nullfunc\n");
4339d328 1792 prism2_send_mgmt(dev, IEEE80211_FTYPE_CTL | IEEE80211_STYPE_ACK,
ff1d2767
JM		 1793 NULL, 0, hdr->addr2, 0);
1794}
1795
1796
1797/* Called only as a scheduled task for pending AP frames. */
1798static void ap_handle_dropped_data(local_info_t *local,
d041674d 1799 struct ieee80211_hdr_4addr *hdr)
ff1d2767
JM		 1800{
1801 struct net_device *dev = local->dev;
1802 struct sta_info *sta;
1803 u16 reason;
1804
1805 spin_lock_bh(&local->ap->sta_table_lock);
1806 sta = ap_get_sta(local->ap, hdr->addr2);
1807 if (sta)
1808 atomic_inc(&sta->users);
1809 spin_unlock_bh(&local->ap->sta_table_lock);
1810
1811 if (sta != NULL && (sta->flags & WLAN_STA_ASSOC)) {
1812 PDEBUG(DEBUG_AP, "ap_handle_dropped_data: STA is now okay?\n");
1813 atomic_dec(&sta->users);
1814 return;
1815 }
1816
1817 reason = __constant_cpu_to_le16(
1818 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
4339d328 1819 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT |
ff1d2767 1820 ((sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) ?
4339d328 1821 IEEE80211_STYPE_DEAUTH : IEEE80211_STYPE_DISASSOC),
ff1d2767
JM		 1822 (char *) &reason, sizeof(reason), hdr->addr2, 0);
1823
1824 if (sta)
1825 atomic_dec(&sta->users);
1826}
1827
1828#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1829
1830
1831/* Called only as a scheduled task for pending AP frames. */
1832static void pspoll_send_buffered(local_info_t *local, struct sta_info *sta,
1833 struct sk_buff *skb)
1834{
5bee720f
JM		 1835 struct hostap_skb_tx_data *meta;
1836
ff1d2767
JM		 1837 if (!(sta->flags & WLAN_STA_PS)) {
1838 /* Station has moved to non-PS mode, so send all buffered
1839 * frames using normal device queue. */
1840 dev_queue_xmit(skb);
1841 return;
1842 }
1843
1844 /* add a flag for hostap_handle_sta_tx() to know that this skb should
1845 * be passed through even though STA is using PS */
5bee720f
JM		 1846 meta = (struct hostap_skb_tx_data *) skb->cb;
1847 meta->flags |= HOSTAP_TX_FLAGS_BUFFERED_FRAME;
ff1d2767
JM		 1848 if (!skb_queue_empty(&sta->tx_buf)) {
1849 /* indicate to STA that more frames follow */
5bee720f 1850 meta->flags |= HOSTAP_TX_FLAGS_ADD_MOREDATA;
ff1d2767
JM		 1851 }
1852 dev_queue_xmit(skb);
1853}
1854
1855
1856/* Called only as a scheduled task for pending AP frames. */
1857static void handle_pspoll(local_info_t *local,
d041674d 1858 struct ieee80211_hdr_4addr *hdr,
ff1d2767
JM		 1859 struct hostap_80211_rx_status *rx_stats)
1860{
1861 struct net_device *dev = local->dev;
1862 struct sta_info *sta;
1863 u16 aid;
1864 struct sk_buff *skb;
1865
1866 PDEBUG(DEBUG_PS2, "handle_pspoll: BSSID=" MACSTR ", TA=" MACSTR
1867 " PWRMGT=%d\n",
1868 MAC2STR(hdr->addr1), MAC2STR(hdr->addr2),
b2f4a2e3 1869 !!(le16_to_cpu(hdr->frame_ctl) & IEEE80211_FCTL_PM));
ff1d2767
JM		 1870
1871 if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN)) {
1872 PDEBUG(DEBUG_AP, "handle_pspoll - addr1(BSSID)=" MACSTR
1873 " not own MAC\n", MAC2STR(hdr->addr1));
1874 return;
1875 }
1876
1877 aid = __le16_to_cpu(hdr->duration_id);
1878 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) {
1879 PDEBUG(DEBUG_PS, " PSPOLL and AID[15:14] not set\n");
1880 return;
1881 }
1882 aid &= ~BIT(15) & ~BIT(14);
1883 if (aid == 0 || aid > MAX_AID_TABLE_SIZE) {
1884 PDEBUG(DEBUG_PS, " invalid aid=%d\n", aid);
1885 return;
1886 }
1887 PDEBUG(DEBUG_PS2, " aid=%d\n", aid);
1888
1889 spin_lock_bh(&local->ap->sta_table_lock);
1890 sta = ap_get_sta(local->ap, hdr->addr2);
1891 if (sta)
1892 atomic_inc(&sta->users);
1893 spin_unlock_bh(&local->ap->sta_table_lock);
1894
1895 if (sta == NULL) {
1896 PDEBUG(DEBUG_PS, " STA not found\n");
1897 return;
1898 }
1899 if (sta->aid != aid) {
1900 PDEBUG(DEBUG_PS, " received aid=%i does not match with "
1901 "assoc.aid=%d\n", aid, sta->aid);
1902 return;
1903 }
1904
1905 /* FIX: todo:
1906 * - add timeout for buffering (clear aid in TIM vector if buffer timed
1907 * out (expiry time must be longer than ListenInterval for
1908 * the corresponding STA; "8802-11: 11.2.1.9 AP aging function"
1909 * - what to do, if buffered, pspolled, and sent frame is not ACKed by
1910 * sta; store buffer for later use and leave TIM aid bit set? use
1911 * TX event to check whether frame was ACKed?
1912 */
1913
1914 while ((skb = skb_dequeue(&sta->tx_buf)) != NULL) {
1915 /* send buffered frame .. */
1916 PDEBUG(DEBUG_PS2, "Sending buffered frame to STA after PS POLL"
1917 " (buffer_count=%d)\n", skb_queue_len(&sta->tx_buf));
1918
1919 pspoll_send_buffered(local, sta, skb);
1920
1921 if (sta->flags & WLAN_STA_PS) {
1922 /* send only one buffered packet per PS Poll */
1923 /* FIX: should ignore further PS Polls until the
1924 * buffered packet that was just sent is acknowledged
1925 * (Tx or TxExc event) */
1926 break;
1927 }
1928 }
1929
1930 if (skb_queue_empty(&sta->tx_buf)) {
1931 /* try to clear aid from TIM */
1932 if (!(sta->flags & WLAN_STA_TIM))
1933 PDEBUG(DEBUG_PS2, "Re-unsetting TIM for aid %d\n",
1934 aid);
1935 hostap_set_tim(local, aid, 0);
1936 sta->flags &= ~WLAN_STA_TIM;
1937 }
1938
1939 atomic_dec(&sta->users);
1940}
1941
1942
1943#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1944
c4028958 1945static void handle_wds_oper_queue(struct work_struct *work)
ff1d2767 1946{
c4028958
DH		 1947 struct ap_data *ap = container_of(work, struct ap_data,
1948 wds_oper_queue);
1949 local_info_t *local = ap->local;
ff1d2767
JM		 1950 struct wds_oper_data *entry, *prev;
1951
1952 spin_lock_bh(&local->lock);
1953 entry = local->ap->wds_oper_entries;
1954 local->ap->wds_oper_entries = NULL;
1955 spin_unlock_bh(&local->lock);
1956
1957 while (entry) {
1958 PDEBUG(DEBUG_AP, "%s: %s automatic WDS connection "
1959 "to AP " MACSTR "\n",
1960 local->dev->name,
1961 entry->type == WDS_ADD ? "adding" : "removing",
1962 MAC2STR(entry->addr));
1963 if (entry->type == WDS_ADD)
1964 prism2_wds_add(local, entry->addr, 0);
1965 else if (entry->type == WDS_DEL)
1966 prism2_wds_del(local, entry->addr, 0, 1);
1967
1968 prev = entry;
1969 entry = entry->next;
1970 kfree(prev);
1971 }
1972}
1973
1974
1975/* Called only as a scheduled task for pending AP frames. */
1976static void handle_beacon(local_info_t *local, struct sk_buff *skb,
1977 struct hostap_80211_rx_status *rx_stats)
1978{
d041674d 1979 struct ieee80211_hdr_4addr *hdr = (struct ieee80211_hdr_4addr *) skb->data;
ff1d2767
JM		 1980 char *body = skb->data + IEEE80211_MGMT_HDR_LEN;
1981 int len, left;
1982 u16 *pos, beacon_int, capability;
1983 char *ssid = NULL;
1984 unsigned char *supp_rates = NULL;
1985 int ssid_len = 0, supp_rates_len = 0;
1986 struct sta_info *sta = NULL;
1987 int new_sta = 0, channel = -1;
1988
1989 len = skb->len - IEEE80211_MGMT_HDR_LEN;
1990
1991 if (len < 8 + 2 + 2) {
1992 printk(KERN_DEBUG "handle_beacon - too short payload "
1993 "(len=%d)\n", len);
1994 return;
1995 }
1996
1997 pos = (u16 *) body;
1998 left = len;
1999
2000 /* Timestamp (8 octets) */
2001 pos += 4; left -= 8;
2002 /* Beacon interval (2 octets) */
2003 beacon_int = __le16_to_cpu(*pos);
2004 pos++; left -= 2;
2005 /* Capability information (2 octets) */
2006 capability = __le16_to_cpu(*pos);
2007 pos++; left -= 2;
2008
2009 if (local->ap->ap_policy != AP_OTHER_AP_EVEN_IBSS &&
2010 capability & WLAN_CAPABILITY_IBSS)
2011 return;
2012
2013 if (left >= 2) {
2014 unsigned int ileft;
2015 unsigned char *u = (unsigned char *) pos;
2016
2017 if (*u == WLAN_EID_SSID) {
2018 u++; left--;
2019 ileft = *u;
2020 u++; left--;
2021
2022 if (ileft > left || ileft > MAX_SSID_LEN) {
2023 PDEBUG(DEBUG_AP, "SSID: overflow\n");
2024 return;
2025 }
2026
2027 if (local->ap->ap_policy == AP_OTHER_AP_SAME_SSID &&
2028 (ileft != strlen(local->essid) ||
2029 memcmp(local->essid, u, ileft) != 0)) {
2030 /* not our SSID */
2031 return;
2032 }
2033
2034 ssid = u;
2035 ssid_len = ileft;
2036
2037 u += ileft;
2038 left -= ileft;
2039 }
2040
2041 if (*u == WLAN_EID_SUPP_RATES) {
2042 u++; left--;
2043 ileft = *u;
2044 u++; left--;
74fae82c 2045
ff1d2767
JM		 2046 if (ileft > left || ileft == 0 || ileft > 8) {
2047 PDEBUG(DEBUG_AP, " - SUPP_RATES len error\n");
2048 return;
2049 }
2050
2051 supp_rates = u;
2052 supp_rates_len = ileft;
2053
2054 u += ileft;
2055 left -= ileft;
2056 }
2057
2058 if (*u == WLAN_EID_DS_PARAMS) {
2059 u++; left--;
2060 ileft = *u;
2061 u++; left--;
74fae82c 2062
ff1d2767
JM		 2063 if (ileft > left || ileft != 1) {
2064 PDEBUG(DEBUG_AP, " - DS_PARAMS len error\n");
2065 return;
2066 }
2067
2068 channel = *u;
2069
2070 u += ileft;
2071 left -= ileft;
2072 }
2073 }
2074
2075 spin_lock_bh(&local->ap->sta_table_lock);
2076 sta = ap_get_sta(local->ap, hdr->addr2);
2077 if (sta != NULL)
2078 atomic_inc(&sta->users);
2079 spin_unlock_bh(&local->ap->sta_table_lock);
2080
2081 if (sta == NULL) {
2082 /* add new AP */
2083 new_sta = 1;
2084 sta = ap_add_sta(local->ap, hdr->addr2);
2085 if (sta == NULL) {
2086 printk(KERN_INFO "prism2: kmalloc failed for AP "
2087 "data structure\n");
2088 return;
2089 }
2090 hostap_event_new_sta(local->dev, sta);
2091
2092 /* mark APs authentication and associated for pseudo ad-hoc
2093 * style communication */
2094 sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
2095
2096 if (local->ap->autom_ap_wds) {
2097 hostap_wds_link_oper(local, sta->addr, WDS_ADD);
2098 }
2099 }
2100
2101 sta->ap = 1;
2102 if (ssid) {
2103 sta->u.ap.ssid_len = ssid_len;
2104 memcpy(sta->u.ap.ssid, ssid, ssid_len);
2105 sta->u.ap.ssid[ssid_len] = '\0';
2106 } else {
2107 sta->u.ap.ssid_len = 0;
2108 sta->u.ap.ssid[0] = '\0';
2109 }
2110 sta->u.ap.channel = channel;
2111 sta->rx_packets++;
2112 sta->rx_bytes += len;
2113 sta->u.ap.last_beacon = sta->last_rx = jiffies;
2114 sta->capability = capability;
2115 sta->listen_interval = beacon_int;
2116
2117 atomic_dec(&sta->users);
2118
2119 if (new_sta) {
2120 memset(sta->supported_rates, 0, sizeof(sta->supported_rates));
2121 memcpy(sta->supported_rates, supp_rates, supp_rates_len);
2122 prism2_check_tx_rates(sta);
2123 }
2124}
2125
2126#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2127
2128
2129/* Called only as a tasklet. */
2130static void handle_ap_item(local_info_t *local, struct sk_buff *skb,
2131 struct hostap_80211_rx_status *rx_stats)
2132{
2133#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2134 struct net_device *dev = local->dev;
2135#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2136 u16 fc, type, stype;
d041674d 2137 struct ieee80211_hdr_4addr *hdr;
ff1d2767
JM		 2138
2139 /* FIX: should give skb->len to handler functions and check that the
2140 * buffer is long enough */
d041674d 2141 hdr = (struct ieee80211_hdr_4addr *) skb->data;
c0f72ca8 2142 fc = le16_to_cpu(hdr->frame_ctl);
4339d328
JM		 2143 type = WLAN_FC_GET_TYPE(fc);
2144 stype = WLAN_FC_GET_STYPE(fc);
ff1d2767
JM		 2145
2146#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
4339d328 2147 if (!local->hostapd && type == IEEE80211_FTYPE_DATA) {
ff1d2767
JM		 2148 PDEBUG(DEBUG_AP, "handle_ap_item - data frame\n");
2149
b2f4a2e3
JM		 2150 if (!(fc & IEEE80211_FCTL_TODS) ||
2151 (fc & IEEE80211_FCTL_FROMDS)) {
4339d328 2152 if (stype == IEEE80211_STYPE_NULLFUNC) {
ff1d2767
JM		 2153 /* no ToDS nullfunc seems to be used to check
2154 * AP association; so send reject message to
2155 * speed up re-association */
2156 ap_handle_dropped_data(local, hdr);
2157 goto done;
2158 }
2159 PDEBUG(DEBUG_AP, " not ToDS frame (fc=0x%04x)\n",
2160 fc);
2161 goto done;
2162 }
2163
2164 if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN)) {
2165 PDEBUG(DEBUG_AP, "handle_ap_item - addr1(BSSID)="
2166 MACSTR " not own MAC\n",
2167 MAC2STR(hdr->addr1));
2168 goto done;
2169 }
2170
4339d328
JM		 2171 if (local->ap->nullfunc_ack &&
2172 stype == IEEE80211_STYPE_NULLFUNC)
ff1d2767
JM		 2173 ap_handle_data_nullfunc(local, hdr);
2174 else
2175 ap_handle_dropped_data(local, hdr);
2176 goto done;
2177 }
2178
4339d328 2179 if (type == IEEE80211_FTYPE_MGMT && stype == IEEE80211_STYPE_BEACON) {
ff1d2767
JM		 2180 handle_beacon(local, skb, rx_stats);
2181 goto done;
2182 }
2183#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2184
4339d328 2185 if (type == IEEE80211_FTYPE_CTL && stype == IEEE80211_STYPE_PSPOLL) {
ff1d2767
JM		 2186 handle_pspoll(local, hdr, rx_stats);
2187 goto done;
2188 }
2189
2190 if (local->hostapd) {
2191 PDEBUG(DEBUG_AP, "Unknown frame in AP queue: type=0x%02x "
2192 "subtype=0x%02x\n", type, stype);
2193 goto done;
2194 }
2195
2196#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
4339d328 2197 if (type != IEEE80211_FTYPE_MGMT) {
ff1d2767
JM		 2198 PDEBUG(DEBUG_AP, "handle_ap_item - not a management frame?\n");
2199 goto done;
2200 }
2201
2202 if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN)) {
2203 PDEBUG(DEBUG_AP, "handle_ap_item - addr1(DA)=" MACSTR
2204 " not own MAC\n", MAC2STR(hdr->addr1));
2205 goto done;
2206 }
2207
2208 if (memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN)) {
2209 PDEBUG(DEBUG_AP, "handle_ap_item - addr3(BSSID)=" MACSTR
2210 " not own MAC\n", MAC2STR(hdr->addr3));
2211 goto done;
2212 }
2213
2214 switch (stype) {
4339d328 2215 case IEEE80211_STYPE_ASSOC_REQ:
ff1d2767
JM		 2216 handle_assoc(local, skb, rx_stats, 0);
2217 break;
4339d328 2218 case IEEE80211_STYPE_ASSOC_RESP:
ff1d2767
JM		 2219 PDEBUG(DEBUG_AP, "==> ASSOC RESP (ignored)\n");
2220 break;
4339d328 2221 case IEEE80211_STYPE_REASSOC_REQ:
ff1d2767
JM		 2222 handle_assoc(local, skb, rx_stats, 1);
2223 break;
4339d328 2224 case IEEE80211_STYPE_REASSOC_RESP:
ff1d2767
JM		 2225 PDEBUG(DEBUG_AP, "==> REASSOC RESP (ignored)\n");
2226 break;
4339d328 2227 case IEEE80211_STYPE_ATIM:
ff1d2767
JM		 2228 PDEBUG(DEBUG_AP, "==> ATIM (ignored)\n");
2229 break;
4339d328 2230 case IEEE80211_STYPE_DISASSOC:
ff1d2767
JM		 2231 handle_disassoc(local, skb, rx_stats);
2232 break;
4339d328 2233 case IEEE80211_STYPE_AUTH:
ff1d2767
JM		 2234 handle_authen(local, skb, rx_stats);
2235 break;
4339d328 2236 case IEEE80211_STYPE_DEAUTH:
ff1d2767
JM		 2237 handle_deauth(local, skb, rx_stats);
2238 break;
2239 default:
4339d328
JM		 2240 PDEBUG(DEBUG_AP, "Unknown mgmt frame subtype 0x%02x\n",
2241 stype >> 4);
ff1d2767
JM		 2242 break;
2243 }
2244#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2245
2246 done:
2247 dev_kfree_skb(skb);
2248}
2249
2250
2251/* Called only as a tasklet (software IRQ) */
2252void hostap_rx(struct net_device *dev, struct sk_buff *skb,
2253 struct hostap_80211_rx_status *rx_stats)
2254{
2255 struct hostap_interface *iface;
2256 local_info_t *local;
2257 u16 fc;
d041674d 2258 struct ieee80211_hdr_4addr *hdr;
ff1d2767
JM		 2259
2260 iface = netdev_priv(dev);
2261 local = iface->local;
2262
2263 if (skb->len < 16)
2264 goto drop;
2265
2266 local->stats.rx_packets++;
2267
d041674d 2268 hdr = (struct ieee80211_hdr_4addr *) skb->data;
c0f72ca8 2269 fc = le16_to_cpu(hdr->frame_ctl);
ff1d2767
JM		 2270
2271 if (local->ap->ap_policy == AP_OTHER_AP_SKIP_ALL &&
4339d328
JM		 2272 WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_MGMT &&
2273 WLAN_FC_GET_STYPE(fc) == IEEE80211_STYPE_BEACON)
ff1d2767
JM		 2274 goto drop;
2275
2276 skb->protocol = __constant_htons(ETH_P_HOSTAP);
2277 handle_ap_item(local, skb, rx_stats);
2278 return;
2279
2280 drop:
2281 dev_kfree_skb(skb);
2282}
2283
2284
2285/* Called only as a tasklet (software IRQ) */
2286static void schedule_packet_send(local_info_t *local, struct sta_info *sta)
2287{
2288 struct sk_buff *skb;
d041674d 2289 struct ieee80211_hdr_4addr *hdr;
ff1d2767
JM		 2290 struct hostap_80211_rx_status rx_stats;
2291
2292 if (skb_queue_empty(&sta->tx_buf))
2293 return;
2294
2295 skb = dev_alloc_skb(16);
2296 if (skb == NULL) {
2297 printk(KERN_DEBUG "%s: schedule_packet_send: skb alloc "
2298 "failed\n", local->dev->name);
2299 return;
2300 }
2301
d041674d 2302 hdr = (struct ieee80211_hdr_4addr *) skb_put(skb, 16);
ff1d2767
JM		 2303
2304 /* Generate a fake pspoll frame to start packet delivery */
c0f72ca8 2305 hdr->frame_ctl = __constant_cpu_to_le16(
4339d328 2306 IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL);
ff1d2767
JM		 2307 memcpy(hdr->addr1, local->dev->dev_addr, ETH_ALEN);
2308 memcpy(hdr->addr2, sta->addr, ETH_ALEN);
2309 hdr->duration_id = cpu_to_le16(sta->aid | BIT(15) | BIT(14));
2310
2311 PDEBUG(DEBUG_PS2, "%s: Scheduling buffered packet delivery for "
2312 "STA " MACSTR "\n", local->dev->name, MAC2STR(sta->addr));
2313
2314 skb->dev = local->dev;
2315
2316 memset(&rx_stats, 0, sizeof(rx_stats));
2317 hostap_rx(local->dev, skb, &rx_stats);
2318}
2319
2320
5fad5a2e
AB		 2321int prism2_ap_get_sta_qual(local_info_t *local, struct sockaddr addr[],
2322 struct iw_quality qual[], int buf_size,
2323 int aplist)
ff1d2767
JM		 2324{
2325 struct ap_data *ap = local->ap;
2326 struct list_head *ptr;
2327 int count = 0;
2328
2329 spin_lock_bh(&ap->sta_table_lock);
2330
2331 for (ptr = ap->sta_list.next; ptr != NULL && ptr != &ap->sta_list;
2332 ptr = ptr->next) {
2333 struct sta_info *sta = (struct sta_info *) ptr;
2334
2335 if (aplist && !sta->ap)
2336 continue;
2337 addr[count].sa_family = ARPHRD_ETHER;
2338 memcpy(addr[count].sa_data, sta->addr, ETH_ALEN);
2339 if (sta->last_rx_silence == 0)
2340 qual[count].qual = sta->last_rx_signal < 27 ?
2341 0 : (sta->last_rx_signal - 27) * 92 / 127;
2342 else
2343 qual[count].qual = sta->last_rx_signal -
2344 sta->last_rx_silence - 35;
2345 qual[count].level = HFA384X_LEVEL_TO_dBm(sta->last_rx_signal);
2346 qual[count].noise = HFA384X_LEVEL_TO_dBm(sta->last_rx_silence);
2347 qual[count].updated = sta->last_rx_updated;
2348
c28df16e 2349 sta->last_rx_updated = IW_QUAL_DBM;
ff1d2767
JM		 2350
2351 count++;
2352 if (count >= buf_size)
2353 break;
2354 }
2355 spin_unlock_bh(&ap->sta_table_lock);
2356
2357 return count;
2358}
2359
2360
2361/* Translate our list of Access Points & Stations to a card independant
2362 * format that the Wireless Tools will understand - Jean II */
5fad5a2e 2363int prism2_ap_translate_scan(struct net_device *dev, char *buffer)
ff1d2767
JM		 2364{
2365 struct hostap_interface *iface;
2366 local_info_t *local;
2367 struct ap_data *ap;
2368 struct list_head *ptr;
2369 struct iw_event iwe;
2370 char *current_ev = buffer;
2371 char *end_buf = buffer + IW_SCAN_MAX_DATA;
2372#if !defined(PRISM2_NO_KERNEL_IEEE80211_MGMT)
2373 char buf[64];
2374#endif
2375
2376 iface = netdev_priv(dev);
2377 local = iface->local;
2378 ap = local->ap;
2379
2380 spin_lock_bh(&ap->sta_table_lock);
2381
2382 for (ptr = ap->sta_list.next; ptr != NULL && ptr != &ap->sta_list;
2383 ptr = ptr->next) {
2384 struct sta_info *sta = (struct sta_info *) ptr;
2385
2386 /* First entry *MUST* be the AP MAC address */
2387 memset(&iwe, 0, sizeof(iwe));
2388 iwe.cmd = SIOCGIWAP;
2389 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
2390 memcpy(iwe.u.ap_addr.sa_data, sta->addr, ETH_ALEN);
2391 iwe.len = IW_EV_ADDR_LEN;
2392 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2393 IW_EV_ADDR_LEN);
2394
2395 /* Use the mode to indicate if it's a station or
2396 * an Access Point */
2397 memset(&iwe, 0, sizeof(iwe));
2398 iwe.cmd = SIOCGIWMODE;
2399 if (sta->ap)
2400 iwe.u.mode = IW_MODE_MASTER;
2401 else
2402 iwe.u.mode = IW_MODE_INFRA;
2403 iwe.len = IW_EV_UINT_LEN;
2404 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2405 IW_EV_UINT_LEN);
2406
2407 /* Some quality */
2408 memset(&iwe, 0, sizeof(iwe));
2409 iwe.cmd = IWEVQUAL;
2410 if (sta->last_rx_silence == 0)
2411 iwe.u.qual.qual = sta->last_rx_signal < 27 ?
2412 0 : (sta->last_rx_signal - 27) * 92 / 127;
2413 else
2414 iwe.u.qual.qual = sta->last_rx_signal -
2415 sta->last_rx_silence - 35;
2416 iwe.u.qual.level = HFA384X_LEVEL_TO_dBm(sta->last_rx_signal);
2417 iwe.u.qual.noise = HFA384X_LEVEL_TO_dBm(sta->last_rx_silence);
2418 iwe.u.qual.updated = sta->last_rx_updated;
2419 iwe.len = IW_EV_QUAL_LEN;
2420 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
2421 IW_EV_QUAL_LEN);
2422
2423#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2424 if (sta->ap) {
2425 memset(&iwe, 0, sizeof(iwe));
2426 iwe.cmd = SIOCGIWESSID;
2427 iwe.u.data.length = sta->u.ap.ssid_len;
2428 iwe.u.data.flags = 1;
2429 current_ev = iwe_stream_add_point(current_ev, end_buf,
2430 &iwe,
2431 sta->u.ap.ssid);
2432
2433 memset(&iwe, 0, sizeof(iwe));
2434 iwe.cmd = SIOCGIWENCODE;
2435 if (sta->capability & WLAN_CAPABILITY_PRIVACY)
2436 iwe.u.data.flags =
2437 IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
2438 else
2439 iwe.u.data.flags = IW_ENCODE_DISABLED;
2440 current_ev = iwe_stream_add_point(current_ev, end_buf,
2441 &iwe,
2442 sta->u.ap.ssid
2443 /* 0 byte memcpy */);
2444
2445 if (sta->u.ap.channel > 0 &&
2446 sta->u.ap.channel <= FREQ_COUNT) {
2447 memset(&iwe, 0, sizeof(iwe));
2448 iwe.cmd = SIOCGIWFREQ;
2449 iwe.u.freq.m = freq_list[sta->u.ap.channel - 1]
2450 * 100000;
2451 iwe.u.freq.e = 1;
2452 current_ev = iwe_stream_add_event(
2453 current_ev, end_buf, &iwe,
2454 IW_EV_FREQ_LEN);
2455 }
2456
2457 memset(&iwe, 0, sizeof(iwe));
2458 iwe.cmd = IWEVCUSTOM;
2459 sprintf(buf, "beacon_interval=%d",
2460 sta->listen_interval);
2461 iwe.u.data.length = strlen(buf);
2462 current_ev = iwe_stream_add_point(current_ev, end_buf,
2463 &iwe, buf);
2464 }
2465#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2466
c28df16e 2467 sta->last_rx_updated = IW_QUAL_DBM;
ff1d2767
JM		 2468
2469 /* To be continued, we should make good use of IWEVCUSTOM */
2470 }
2471
2472 spin_unlock_bh(&ap->sta_table_lock);
2473
2474 return current_ev - buffer;
2475}
2476
2477
2478static int prism2_hostapd_add_sta(struct ap_data *ap,
2479 struct prism2_hostapd_param *param)
2480{
2481 struct sta_info *sta;
2482
2483 spin_lock_bh(&ap->sta_table_lock);
2484 sta = ap_get_sta(ap, param->sta_addr);
2485 if (sta)
2486 atomic_inc(&sta->users);
2487 spin_unlock_bh(&ap->sta_table_lock);
2488
2489 if (sta == NULL) {
2490 sta = ap_add_sta(ap, param->sta_addr);
2491 if (sta == NULL)
2492 return -1;
2493 }
2494
2495 if (!(sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
2496 hostap_event_new_sta(sta->local->dev, sta);
2497
2498 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC;
2499 sta->last_rx = jiffies;
2500 sta->aid = param->u.add_sta.aid;
2501 sta->capability = param->u.add_sta.capability;
2502 sta->tx_supp_rates = param->u.add_sta.tx_supp_rates;
2503 if (sta->tx_supp_rates & WLAN_RATE_1M)
2504 sta->supported_rates[0] = 2;
2505 if (sta->tx_supp_rates & WLAN_RATE_2M)
2506 sta->supported_rates[1] = 4;
2507 if (sta->tx_supp_rates & WLAN_RATE_5M5)
2508 sta->supported_rates[2] = 11;
2509 if (sta->tx_supp_rates & WLAN_RATE_11M)
2510 sta->supported_rates[3] = 22;
2511 prism2_check_tx_rates(sta);
2512 atomic_dec(&sta->users);
2513 return 0;
2514}
2515
2516
2517static int prism2_hostapd_remove_sta(struct ap_data *ap,
2518 struct prism2_hostapd_param *param)
2519{
2520 struct sta_info *sta;
2521
2522 spin_lock_bh(&ap->sta_table_lock);
2523 sta = ap_get_sta(ap, param->sta_addr);
2524 if (sta) {
2525 ap_sta_hash_del(ap, sta);
2526 list_del(&sta->list);
2527 }
2528 spin_unlock_bh(&ap->sta_table_lock);
2529
2530 if (!sta)
2531 return -ENOENT;
2532
2533 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
2534 hostap_event_expired_sta(sta->local->dev, sta);
2535 ap_free_sta(ap, sta);
2536
2537 return 0;
2538}
2539
2540
2541static int prism2_hostapd_get_info_sta(struct ap_data *ap,
2542 struct prism2_hostapd_param *param)
2543{
2544 struct sta_info *sta;
2545
2546 spin_lock_bh(&ap->sta_table_lock);
2547 sta = ap_get_sta(ap, param->sta_addr);
2548 if (sta)
2549 atomic_inc(&sta->users);
2550 spin_unlock_bh(&ap->sta_table_lock);
2551
2552 if (!sta)
2553 return -ENOENT;
2554
2555 param->u.get_info_sta.inactive_sec = (jiffies - sta->last_rx) / HZ;
2556
2557 atomic_dec(&sta->users);
2558
2559 return 1;
2560}
2561
2562
2563static int prism2_hostapd_set_flags_sta(struct ap_data *ap,
2564 struct prism2_hostapd_param *param)
2565{
2566 struct sta_info *sta;
2567
2568 spin_lock_bh(&ap->sta_table_lock);
2569 sta = ap_get_sta(ap, param->sta_addr);
2570 if (sta) {
2571 sta->flags |= param->u.set_flags_sta.flags_or;
2572 sta->flags &= param->u.set_flags_sta.flags_and;
2573 }
2574 spin_unlock_bh(&ap->sta_table_lock);
2575
2576 if (!sta)
2577 return -ENOENT;
2578
2579 return 0;
2580}
2581
2582
2583static int prism2_hostapd_sta_clear_stats(struct ap_data *ap,
2584 struct prism2_hostapd_param *param)
2585{
2586 struct sta_info *sta;
2587 int rate;
2588
2589 spin_lock_bh(&ap->sta_table_lock);
2590 sta = ap_get_sta(ap, param->sta_addr);
2591 if (sta) {
2592 sta->rx_packets = sta->tx_packets = 0;
2593 sta->rx_bytes = sta->tx_bytes = 0;
2594 for (rate = 0; rate < WLAN_RATE_COUNT; rate++) {
2595 sta->tx_count[rate] = 0;
2596 sta->rx_count[rate] = 0;
2597 }
2598 }
2599 spin_unlock_bh(&ap->sta_table_lock);
2600
2601 if (!sta)
2602 return -ENOENT;
2603
2604 return 0;
2605}
2606
2607
5fad5a2e 2608int prism2_hostapd(struct ap_data *ap, struct prism2_hostapd_param *param)
ff1d2767
JM		 2609{
2610 switch (param->cmd) {
2611 case PRISM2_HOSTAPD_FLUSH:
2612 ap_control_kickall(ap);
2613 return 0;
2614 case PRISM2_HOSTAPD_ADD_STA:
2615 return prism2_hostapd_add_sta(ap, param);
2616 case PRISM2_HOSTAPD_REMOVE_STA:
2617 return prism2_hostapd_remove_sta(ap, param);
2618 case PRISM2_HOSTAPD_GET_INFO_STA:
2619 return prism2_hostapd_get_info_sta(ap, param);
2620 case PRISM2_HOSTAPD_SET_FLAGS_STA:
2621 return prism2_hostapd_set_flags_sta(ap, param);
2622 case PRISM2_HOSTAPD_STA_CLEAR_STATS:
2623 return prism2_hostapd_sta_clear_stats(ap, param);
2624 default:
2625 printk(KERN_WARNING "prism2_hostapd: unknown cmd=%d\n",
2626 param->cmd);
2627 return -EOPNOTSUPP;
2628 }
2629}
2630
2631
2632/* Update station info for host-based TX rate control and return current
2633 * TX rate */
2634static int ap_update_sta_tx_rate(struct sta_info *sta, struct net_device *dev)
2635{
2636 int ret = sta->tx_rate;
2637 struct hostap_interface *iface;
2638 local_info_t *local;
2639
2640 iface = netdev_priv(dev);
2641 local = iface->local;
2642
2643 sta->tx_count[sta->tx_rate_idx]++;
2644 sta->tx_since_last_failure++;
2645 sta->tx_consecutive_exc = 0;
2646 if (sta->tx_since_last_failure >= WLAN_RATE_UPDATE_COUNT &&
2647 sta->tx_rate_idx < sta->tx_max_rate) {
2648 /* use next higher rate */
2649 int old_rate, new_rate;
2650 old_rate = new_rate = sta->tx_rate_idx;
2651 while (new_rate < sta->tx_max_rate) {
2652 new_rate++;
2653 if (ap_tx_rate_ok(new_rate, sta, local)) {
2654 sta->tx_rate_idx = new_rate;
2655 break;
2656 }
2657 }
2658 if (old_rate != sta->tx_rate_idx) {
2659 switch (sta->tx_rate_idx) {
2660 case 0: sta->tx_rate = 10; break;
2661 case 1: sta->tx_rate = 20; break;
2662 case 2: sta->tx_rate = 55; break;
2663 case 3: sta->tx_rate = 110; break;
2664 default: sta->tx_rate = 0; break;
2665 }
2666 PDEBUG(DEBUG_AP, "%s: STA " MACSTR " TX rate raised to"
2667 " %d\n", dev->name, MAC2STR(sta->addr),
2668 sta->tx_rate);
2669 }
2670 sta->tx_since_last_failure = 0;
2671 }
2672
2673 return ret;
2674}
2675
2676
2677/* Called only from software IRQ. Called for each TX frame prior possible
2678 * encryption and transmit. */
2679ap_tx_ret hostap_handle_sta_tx(local_info_t *local, struct hostap_tx_data *tx)
2680{
2681 struct sta_info *sta = NULL;
2682 struct sk_buff *skb = tx->skb;
2683 int set_tim, ret;
d041674d 2684 struct ieee80211_hdr_4addr *hdr;
ff1d2767
JM		 2685 struct hostap_skb_tx_data *meta;
2686
2687 meta = (struct hostap_skb_tx_data *) skb->cb;
2688 ret = AP_TX_CONTINUE;
2689 if (local->ap == NULL || skb->len < 10 ||
2690 meta->iface->type == HOSTAP_INTERFACE_STA)
2691 goto out;
2692
d041674d 2693 hdr = (struct ieee80211_hdr_4addr *) skb->data;
ff1d2767
JM		 2694
2695 if (hdr->addr1[0] & 0x01) {
2696 /* broadcast/multicast frame - no AP related processing */
b9180990
PR		 2697 if (local->ap->num_sta <= 0)
2698 ret = AP_TX_DROP;
ff1d2767
JM		 2699 goto out;
2700 }
2701
2702 /* unicast packet - check whether destination STA is associated */
2703 spin_lock(&local->ap->sta_table_lock);
2704 sta = ap_get_sta(local->ap, hdr->addr1);
2705 if (sta)
2706 atomic_inc(&sta->users);
2707 spin_unlock(&local->ap->sta_table_lock);
2708
5bee720f
JM		 2709 if (local->iw_mode == IW_MODE_MASTER && sta == NULL &&
2710 !(meta->flags & HOSTAP_TX_FLAGS_WDS) &&
ff1d2767
JM		 2711 meta->iface->type != HOSTAP_INTERFACE_MASTER &&
2712 meta->iface->type != HOSTAP_INTERFACE_AP) {
2713#if 0
2714 /* This can happen, e.g., when wlan0 is added to a bridge and
2715 * bridging code does not know which port is the correct target
2716 * for a unicast frame. In this case, the packet is send to all
2717 * ports of the bridge. Since this is a valid scenario, do not
2718 * print out any errors here. */
2719 if (net_ratelimit()) {
2720 printk(KERN_DEBUG "AP: drop packet to non-associated "
2721 "STA " MACSTR "\n", MAC2STR(hdr->addr1));
2722 }
2723#endif
2724 local->ap->tx_drop_nonassoc++;
2725 ret = AP_TX_DROP;
2726 goto out;
2727 }
2728
2729 if (sta == NULL)
2730 goto out;
2731
2732 if (!(sta->flags & WLAN_STA_AUTHORIZED))
2733 ret = AP_TX_CONTINUE_NOT_AUTHORIZED;
2734
2735 /* Set tx_rate if using host-based TX rate control */
2736 if (!local->fw_tx_rate_control)
2737 local->ap->last_tx_rate = meta->rate =
2738 ap_update_sta_tx_rate(sta, local->dev);
2739
2740 if (local->iw_mode != IW_MODE_MASTER)
2741 goto out;
2742
2743 if (!(sta->flags & WLAN_STA_PS))
2744 goto out;
2745
5bee720f
JM		 2746 if (meta->flags & HOSTAP_TX_FLAGS_ADD_MOREDATA) {
2747 /* indicate to STA that more frames follow */
b2f4a2e3
JM		 2748 hdr->frame_ctl |=
2749 __constant_cpu_to_le16(IEEE80211_FCTL_MOREDATA);
5bee720f 2750 }
ff1d2767 2751
5bee720f
JM		 2752 if (meta->flags & HOSTAP_TX_FLAGS_BUFFERED_FRAME) {
2753 /* packet was already buffered and now send due to
2754 * PS poll, so do not rebuffer it */
2755 goto out;
ff1d2767
JM		 2756 }
2757
2758 if (skb_queue_len(&sta->tx_buf) >= STA_MAX_TX_BUFFER) {
2759 PDEBUG(DEBUG_PS, "%s: No more space in STA (" MACSTR ")'s PS "
2760 "mode buffer\n", local->dev->name, MAC2STR(sta->addr));
2761 /* Make sure that TIM is set for the station (it might not be
2762 * after AP wlan hw reset). */
2763 /* FIX: should fix hw reset to restore bits based on STA
2764 * buffer state.. */
2765 hostap_set_tim(local, sta->aid, 1);
2766 sta->flags |= WLAN_STA_TIM;
2767 ret = AP_TX_DROP;
2768 goto out;
2769 }
2770
2771 /* STA in PS mode, buffer frame for later delivery */
2772 set_tim = skb_queue_empty(&sta->tx_buf);
2773 skb_queue_tail(&sta->tx_buf, skb);
2774 /* FIX: could save RX time to skb and expire buffered frames after
2775 * some time if STA does not poll for them */
2776
2777 if (set_tim) {
2778 if (sta->flags & WLAN_STA_TIM)
2779 PDEBUG(DEBUG_PS2, "Re-setting TIM for aid %d\n",
2780 sta->aid);
2781 hostap_set_tim(local, sta->aid, 1);
2782 sta->flags |= WLAN_STA_TIM;
2783 }
2784
2785 ret = AP_TX_BUFFERED;
2786
2787 out:
2788 if (sta != NULL) {
2789 if (ret == AP_TX_CONTINUE ||
2790 ret == AP_TX_CONTINUE_NOT_AUTHORIZED) {
2791 sta->tx_packets++;
2792 sta->tx_bytes += skb->len;
2793 sta->last_tx = jiffies;
2794 }
2795
2796 if ((ret == AP_TX_CONTINUE ||
2797 ret == AP_TX_CONTINUE_NOT_AUTHORIZED) &&
2798 sta->crypt && tx->host_encrypt) {
2799 tx->crypt = sta->crypt;
2800 tx->sta_ptr = sta; /* hostap_handle_sta_release() will
2801 * be called to release sta info
2802 * later */
2803 } else
2804 atomic_dec(&sta->users);
2805 }
2806
2807 return ret;
2808}
2809
2810
2811void hostap_handle_sta_release(void *ptr)
2812{
2813 struct sta_info *sta = ptr;
2814 atomic_dec(&sta->users);
2815}
2816
2817
2818/* Called only as a tasklet (software IRQ) */
2819void hostap_handle_sta_tx_exc(local_info_t *local, struct sk_buff *skb)
2820{
2821 struct sta_info *sta;
d041674d 2822 struct ieee80211_hdr_4addr *hdr;
ff1d2767
JM		 2823 struct hostap_skb_tx_data *meta;
2824
d041674d 2825 hdr = (struct ieee80211_hdr_4addr *) skb->data;
ff1d2767
JM		 2826 meta = (struct hostap_skb_tx_data *) skb->cb;
2827
2828 spin_lock(&local->ap->sta_table_lock);
2829 sta = ap_get_sta(local->ap, hdr->addr1);
2830 if (!sta) {
2831 spin_unlock(&local->ap->sta_table_lock);
2832 PDEBUG(DEBUG_AP, "%s: Could not find STA " MACSTR " for this "
2833 "TX error (@%lu)\n",
2834 local->dev->name, MAC2STR(hdr->addr1), jiffies);
2835 return;
2836 }
2837
2838 sta->tx_since_last_failure = 0;
2839 sta->tx_consecutive_exc++;
74fae82c 2840
ff1d2767
JM		 2841 if (sta->tx_consecutive_exc >= WLAN_RATE_DECREASE_THRESHOLD &&
2842 sta->tx_rate_idx > 0 && meta->rate <= sta->tx_rate) {
2843 /* use next lower rate */
2844 int old, rate;
2845 old = rate = sta->tx_rate_idx;
2846 while (rate > 0) {
2847 rate--;
2848 if (ap_tx_rate_ok(rate, sta, local)) {
2849 sta->tx_rate_idx = rate;
2850 break;
2851 }
2852 }
2853 if (old != sta->tx_rate_idx) {
2854 switch (sta->tx_rate_idx) {
2855 case 0: sta->tx_rate = 10; break;
2856 case 1: sta->tx_rate = 20; break;
2857 case 2: sta->tx_rate = 55; break;
2858 case 3: sta->tx_rate = 110; break;
2859 default: sta->tx_rate = 0; break;
2860 }
2861 PDEBUG(DEBUG_AP, "%s: STA " MACSTR " TX rate lowered "
2862 "to %d\n", local->dev->name, MAC2STR(sta->addr),
2863 sta->tx_rate);
2864 }
2865 sta->tx_consecutive_exc = 0;
2866 }
2867 spin_unlock(&local->ap->sta_table_lock);
2868}
2869
2870
2871static void hostap_update_sta_ps2(local_info_t *local, struct sta_info *sta,
2872 int pwrmgt, int type, int stype)
2873{
2874 if (pwrmgt && !(sta->flags & WLAN_STA_PS)) {
2875 sta->flags |= WLAN_STA_PS;
2876 PDEBUG(DEBUG_PS2, "STA " MACSTR " changed to use PS "
2877 "mode (type=0x%02X, stype=0x%02X)\n",
4339d328 2878 MAC2STR(sta->addr), type >> 2, stype >> 4);
ff1d2767
JM		 2879 } else if (!pwrmgt && (sta->flags & WLAN_STA_PS)) {
2880 sta->flags &= ~WLAN_STA_PS;
2881 PDEBUG(DEBUG_PS2, "STA " MACSTR " changed to not use "
2882 "PS mode (type=0x%02X, stype=0x%02X)\n",
4339d328
JM		 2883 MAC2STR(sta->addr), type >> 2, stype >> 4);
2884 if (type != IEEE80211_FTYPE_CTL ||
2885 stype != IEEE80211_STYPE_PSPOLL)
ff1d2767
JM		 2886 schedule_packet_send(local, sta);
2887 }
2888}
2889
2890
2891/* Called only as a tasklet (software IRQ). Called for each RX frame to update
c0f72ca8 2892 * STA power saving state. pwrmgt is a flag from 802.11 frame_ctl field. */
d041674d 2893int hostap_update_sta_ps(local_info_t *local, struct ieee80211_hdr_4addr *hdr)
ff1d2767
JM		 2894{
2895 struct sta_info *sta;
2896 u16 fc;
2897
2898 spin_lock(&local->ap->sta_table_lock);
2899 sta = ap_get_sta(local->ap, hdr->addr2);
2900 if (sta)
2901 atomic_inc(&sta->users);
2902 spin_unlock(&local->ap->sta_table_lock);
2903
2904 if (!sta)
2905 return -1;
2906
c0f72ca8 2907 fc = le16_to_cpu(hdr->frame_ctl);
b2f4a2e3 2908 hostap_update_sta_ps2(local, sta, fc & IEEE80211_FCTL_PM,
4339d328 2909 WLAN_FC_GET_TYPE(fc), WLAN_FC_GET_STYPE(fc));
ff1d2767
JM		 2910
2911 atomic_dec(&sta->users);
2912 return 0;
2913}
2914
2915
2916/* Called only as a tasklet (software IRQ). Called for each RX frame after
2917 * getting RX header and payload from hardware. */
2918ap_rx_ret hostap_handle_sta_rx(local_info_t *local, struct net_device *dev,
2919 struct sk_buff *skb,
2920 struct hostap_80211_rx_status *rx_stats,
2921 int wds)
2922{
2923 int ret;
2924 struct sta_info *sta;
2925 u16 fc, type, stype;
d041674d 2926 struct ieee80211_hdr_4addr *hdr;
ff1d2767
JM		 2927
2928 if (local->ap == NULL)
2929 return AP_RX_CONTINUE;
2930
d041674d 2931 hdr = (struct ieee80211_hdr_4addr *) skb->data;
ff1d2767 2932
c0f72ca8 2933 fc = le16_to_cpu(hdr->frame_ctl);
4339d328
JM		 2934 type = WLAN_FC_GET_TYPE(fc);
2935 stype = WLAN_FC_GET_STYPE(fc);
ff1d2767
JM		 2936
2937 spin_lock(&local->ap->sta_table_lock);
2938 sta = ap_get_sta(local->ap, hdr->addr2);
2939 if (sta)
2940 atomic_inc(&sta->users);
2941 spin_unlock(&local->ap->sta_table_lock);
2942
2943 if (sta && !(sta->flags & WLAN_STA_AUTHORIZED))
2944 ret = AP_RX_CONTINUE_NOT_AUTHORIZED;
2945 else
2946 ret = AP_RX_CONTINUE;
2947
2948
b2f4a2e3 2949 if (fc & IEEE80211_FCTL_TODS) {
ff1d2767
JM		 2950 if (!wds && (sta == NULL || !(sta->flags & WLAN_STA_ASSOC))) {
2951 if (local->hostapd) {
2952 prism2_rx_80211(local->apdev, skb, rx_stats,
2953 PRISM2_RX_NON_ASSOC);
2954#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2955 } else {
2956 printk(KERN_DEBUG "%s: dropped received packet"
2957 " from non-associated STA " MACSTR
2958 " (type=0x%02x, subtype=0x%02x)\n",
4339d328
JM		 2959 dev->name, MAC2STR(hdr->addr2),
2960 type >> 2, stype >> 4);
ff1d2767
JM		 2961 hostap_rx(dev, skb, rx_stats);
2962#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2963 }
2964 ret = AP_RX_EXIT;
2965 goto out;
2966 }
b2f4a2e3 2967 } else if (fc & IEEE80211_FCTL_FROMDS) {
ff1d2767
JM		 2968 if (!wds) {
2969 /* FromDS frame - not for us; probably
2970 * broadcast/multicast in another BSS - drop */
2971 if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
2972 printk(KERN_DEBUG "Odd.. FromDS packet "
2973 "received with own BSSID\n");
2974 hostap_dump_rx_80211(dev->name, skb, rx_stats);
2975 }
2976 ret = AP_RX_DROP;
2977 goto out;
2978 }
4339d328 2979 } else if (stype == IEEE80211_STYPE_NULLFUNC && sta == NULL &&
ff1d2767
JM		 2980 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
2981
2982 if (local->hostapd) {
2983 prism2_rx_80211(local->apdev, skb, rx_stats,
2984 PRISM2_RX_NON_ASSOC);
2985#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2986 } else {
2987 /* At least Lucent f/w seems to send data::nullfunc
2988 * frames with no ToDS flag when the current AP returns
2989 * after being unavailable for some time. Speed up
2990 * re-association by informing the station about it not
2991 * being associated. */
2992 printk(KERN_DEBUG "%s: rejected received nullfunc "
2993 "frame without ToDS from not associated STA "
2994 MACSTR "\n",
2995 dev->name, MAC2STR(hdr->addr2));
2996 hostap_rx(dev, skb, rx_stats);
2997#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2998 }
2999 ret = AP_RX_EXIT;
3000 goto out;
4339d328 3001 } else if (stype == IEEE80211_STYPE_NULLFUNC) {
ff1d2767
JM		 3002 /* At least Lucent cards seem to send periodic nullfunc
3003 * frames with ToDS. Let these through to update SQ
3004 * stats and PS state. Nullfunc frames do not contain
3005 * any data and they will be dropped below. */
3006 } else {
3007 /* If BSSID (Addr3) is foreign, this frame is a normal
3008 * broadcast frame from an IBSS network. Drop it silently.
3009 * If BSSID is own, report the dropping of this frame. */
3010 if (memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
3011 printk(KERN_DEBUG "%s: dropped received packet from "
3012 MACSTR " with no ToDS flag (type=0x%02x, "
3013 "subtype=0x%02x)\n", dev->name,
4339d328 3014 MAC2STR(hdr->addr2), type >> 2, stype >> 4);
ff1d2767
JM		 3015 hostap_dump_rx_80211(dev->name, skb, rx_stats);
3016 }
3017 ret = AP_RX_DROP;
3018 goto out;
3019 }
3020
3021 if (sta) {
b2f4a2e3 3022 hostap_update_sta_ps2(local, sta, fc & IEEE80211_FCTL_PM,
ff1d2767
JM		 3023 type, stype);
3024
3025 sta->rx_packets++;
3026 sta->rx_bytes += skb->len;
3027 sta->last_rx = jiffies;
3028 }
3029
4339d328 3030 if (local->ap->nullfunc_ack && stype == IEEE80211_STYPE_NULLFUNC &&
b2f4a2e3 3031 fc & IEEE80211_FCTL_TODS) {
ff1d2767
JM		 3032 if (local->hostapd) {
3033 prism2_rx_80211(local->apdev, skb, rx_stats,
3034 PRISM2_RX_NULLFUNC_ACK);
3035#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
3036 } else {
3037 /* some STA f/w's seem to require control::ACK frame
3038 * for data::nullfunc, but Prism2 f/w 0.8.0 (at least
3039 * from Compaq) does not send this.. Try to generate
3040 * ACK for these frames from the host driver to make
3041 * power saving work with, e.g., Lucent WaveLAN f/w */
3042 hostap_rx(dev, skb, rx_stats);
3043#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
3044 }
3045 ret = AP_RX_EXIT;
3046 goto out;
3047 }
3048
3049 out:
3050 if (sta)
3051 atomic_dec(&sta->users);
3052
3053 return ret;
3054}
3055
3056
3057/* Called only as a tasklet (software IRQ) */
3058int hostap_handle_sta_crypto(local_info_t *local,
d041674d 3059 struct ieee80211_hdr_4addr *hdr,
62fe7e37
JM		 3060 struct ieee80211_crypt_data **crypt,
3061 void **sta_ptr)
ff1d2767
JM		 3062{
3063 struct sta_info *sta;
3064
3065 spin_lock(&local->ap->sta_table_lock);
3066 sta = ap_get_sta(local->ap, hdr->addr2);
3067 if (sta)
3068 atomic_inc(&sta->users);
3069 spin_unlock(&local->ap->sta_table_lock);
3070
3071 if (!sta)
3072 return -1;
3073
3074 if (sta->crypt) {
3075 *crypt = sta->crypt;
3076 *sta_ptr = sta;
3077 /* hostap_handle_sta_release() will be called to release STA
3078 * info */
3079 } else
3080 atomic_dec(&sta->users);
3081
3082 return 0;
3083}
3084
3085
3086/* Called only as a tasklet (software IRQ) */
3087int hostap_is_sta_assoc(struct ap_data *ap, u8 *sta_addr)
3088{
3089 struct sta_info *sta;
3090 int ret = 0;
3091
3092 spin_lock(&ap->sta_table_lock);
3093 sta = ap_get_sta(ap, sta_addr);
3094 if (sta != NULL && (sta->flags & WLAN_STA_ASSOC) && !sta->ap)
3095 ret = 1;
3096 spin_unlock(&ap->sta_table_lock);
3097
3098 return ret;
3099}
3100
3101
3102/* Called only as a tasklet (software IRQ) */
3103int hostap_is_sta_authorized(struct ap_data *ap, u8 *sta_addr)
3104{
3105 struct sta_info *sta;
3106 int ret = 0;
3107
3108 spin_lock(&ap->sta_table_lock);
3109 sta = ap_get_sta(ap, sta_addr);
3110 if (sta != NULL && (sta->flags & WLAN_STA_ASSOC) && !sta->ap &&
3111 ((sta->flags & WLAN_STA_AUTHORIZED) ||
3112 ap->local->ieee_802_1x == 0))
3113 ret = 1;
3114 spin_unlock(&ap->sta_table_lock);
3115
3116 return ret;
3117}
3118
3119
3120/* Called only as a tasklet (software IRQ) */
3121int hostap_add_sta(struct ap_data *ap, u8 *sta_addr)
3122{
3123 struct sta_info *sta;
3124 int ret = 1;
3125
3126 if (!ap)
3127 return -1;
3128
3129 spin_lock(&ap->sta_table_lock);
3130 sta = ap_get_sta(ap, sta_addr);
3131 if (sta)
3132 ret = 0;
3133 spin_unlock(&ap->sta_table_lock);
3134
3135 if (ret == 1) {
3136 sta = ap_add_sta(ap, sta_addr);
3137 if (!sta)
54b85f48 3138 return -1;
ff1d2767
JM		 3139 sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
3140 sta->ap = 1;
3141 memset(sta->supported_rates, 0, sizeof(sta->supported_rates));
3142 /* No way of knowing which rates are supported since we did not
3143 * get supported rates element from beacon/assoc req. Assume
3144 * that remote end supports all 802.11b rates. */
3145 sta->supported_rates[0] = 0x82;
3146 sta->supported_rates[1] = 0x84;
3147 sta->supported_rates[2] = 0x0b;
3148 sta->supported_rates[3] = 0x16;
3149 sta->tx_supp_rates = WLAN_RATE_1M | WLAN_RATE_2M |
3150 WLAN_RATE_5M5 | WLAN_RATE_11M;
3151 sta->tx_rate = 110;
3152 sta->tx_max_rate = sta->tx_rate_idx = 3;
3153 }
3154
3155 return ret;
3156}
3157
3158
3159/* Called only as a tasklet (software IRQ) */
3160int hostap_update_rx_stats(struct ap_data *ap,
d041674d 3161 struct ieee80211_hdr_4addr *hdr,
ff1d2767
JM		 3162 struct hostap_80211_rx_status *rx_stats)
3163{
3164 struct sta_info *sta;
3165
3166 if (!ap)
3167 return -1;
3168
3169 spin_lock(&ap->sta_table_lock);
3170 sta = ap_get_sta(ap, hdr->addr2);
3171 if (sta) {
3172 sta->last_rx_silence = rx_stats->noise;
3173 sta->last_rx_signal = rx_stats->signal;
3174 sta->last_rx_rate = rx_stats->rate;
c28df16e 3175 sta->last_rx_updated = IW_QUAL_ALL_UPDATED | IW_QUAL_DBM;
ff1d2767
JM		 3176 if (rx_stats->rate == 10)
3177 sta->rx_count[0]++;
3178 else if (rx_stats->rate == 20)
3179 sta->rx_count[1]++;
3180 else if (rx_stats->rate == 55)
3181 sta->rx_count[2]++;
3182 else if (rx_stats->rate == 110)
3183 sta->rx_count[3]++;
3184 }
3185 spin_unlock(&ap->sta_table_lock);
3186
3187 return sta ? 0 : -1;
3188}
3189
3190
3191void hostap_update_rates(local_info_t *local)
3192{
c1505731 3193 struct sta_info *sta;
ff1d2767
JM		 3194 struct ap_data *ap = local->ap;
3195
3196 if (!ap)
3197 return;
3198
3199 spin_lock_bh(&ap->sta_table_lock);
c1505731 3200 list_for_each_entry(sta, &ap->sta_list, list) {
ff1d2767
JM		 3201 prism2_check_tx_rates(sta);
3202 }
3203 spin_unlock_bh(&ap->sta_table_lock);
3204}
3205
3206
5fad5a2e
AB		 3207void * ap_crypt_get_ptrs(struct ap_data *ap, u8 *addr, int permanent,
3208 struct ieee80211_crypt_data ***crypt)
ff1d2767
JM		 3209{
3210 struct sta_info *sta;
3211
3212 spin_lock_bh(&ap->sta_table_lock);
3213 sta = ap_get_sta(ap, addr);
3214 if (sta)
3215 atomic_inc(&sta->users);
3216 spin_unlock_bh(&ap->sta_table_lock);
3217
3218 if (!sta && permanent)
3219 sta = ap_add_sta(ap, addr);
3220
3221 if (!sta)
3222 return NULL;
3223
3224 if (permanent)
3225 sta->flags |= WLAN_STA_PERM;
3226
3227 *crypt = &sta->crypt;
3228
3229 return sta;
3230}
3231
3232
3233void hostap_add_wds_links(local_info_t *local)
3234{
3235 struct ap_data *ap = local->ap;
c1505731 3236 struct sta_info *sta;
ff1d2767
JM		 3237
3238 spin_lock_bh(&ap->sta_table_lock);
c1505731 3239 list_for_each_entry(sta, &ap->sta_list, list) {
ff1d2767
JM		 3240 if (sta->ap)
3241 hostap_wds_link_oper(local, sta->addr, WDS_ADD);
3242 }
3243 spin_unlock_bh(&ap->sta_table_lock);
3244
3245 schedule_work(&local->ap->wds_oper_queue);
3246}
3247
3248
3249void hostap_wds_link_oper(local_info_t *local, u8 *addr, wds_oper_type type)
3250{
3251 struct wds_oper_data *entry;
3252
3253 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
3254 if (!entry)
3255 return;
3256 memcpy(entry->addr, addr, ETH_ALEN);
3257 entry->type = type;
3258 spin_lock_bh(&local->lock);
3259 entry->next = local->ap->wds_oper_entries;
3260 local->ap->wds_oper_entries = entry;
3261 spin_unlock_bh(&local->lock);
3262
3263 schedule_work(&local->ap->wds_oper_queue);
3264}
3265
3266
3267EXPORT_SYMBOL(hostap_init_data);
3268EXPORT_SYMBOL(hostap_init_ap_proc);
3269EXPORT_SYMBOL(hostap_free_data);
3270EXPORT_SYMBOL(hostap_check_sta_fw_version);
ff1d2767 3271EXPORT_SYMBOL(hostap_handle_sta_tx_exc);
ff1d2767 3272#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
ff1d2767 3273#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
kernel source for telekom puls (alcatel/mediatek)