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[mirror_ubuntu-artful-kernel.git] / drivers / net / wireless / intersil / 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 19#include <linux/proc_fs.h>
6bbefe86 20#include <linux/seq_file.h>
5fad5a2e
AB		 21#include <linux/delay.h>
22#include <linux/random.h>
1ea893fd 23#include <linux/if_arp.h>
5a0e3ad6 24#include <linux/slab.h>
ee40fa06 25#include <linux/export.h>
6eb07caf 26#include <linux/moduleparam.h>
d22fbd70 27#include <linux/etherdevice.h>
5fad5a2e
AB		 28
29#include "hostap_wlan.h"
30#include "hostap.h"
31#include "hostap_ap.h"
32
ff1d2767
JM		 33static int other_ap_policy[MAX_PARM_DEVICES] = { AP_OTHER_AP_SKIP_ALL,
34 DEF_INTS };
35module_param_array(other_ap_policy, int, NULL, 0444);
36MODULE_PARM_DESC(other_ap_policy, "Other AP beacon monitoring policy (0-3)");
37
38static int ap_max_inactivity[MAX_PARM_DEVICES] = { AP_MAX_INACTIVITY_SEC,
39 DEF_INTS };
40module_param_array(ap_max_inactivity, int, NULL, 0444);
41MODULE_PARM_DESC(ap_max_inactivity, "AP timeout (in seconds) for station "
42 "inactivity");
43
44static int ap_bridge_packets[MAX_PARM_DEVICES] = { 1, DEF_INTS };
45module_param_array(ap_bridge_packets, int, NULL, 0444);
46MODULE_PARM_DESC(ap_bridge_packets, "Bridge packets directly between "
47 "stations");
48
49static int autom_ap_wds[MAX_PARM_DEVICES] = { 0, DEF_INTS };
50module_param_array(autom_ap_wds, int, NULL, 0444);
51MODULE_PARM_DESC(autom_ap_wds, "Add WDS connections to other APs "
52 "automatically");
53
54
55static struct sta_info* ap_get_sta(struct ap_data *ap, u8 *sta);
56static void hostap_event_expired_sta(struct net_device *dev,
57 struct sta_info *sta);
c4028958 58static void handle_add_proc_queue(struct work_struct *work);
ff1d2767
JM		 59
60#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
c4028958 61static void handle_wds_oper_queue(struct work_struct *work);
ff1d2767 62static void prism2_send_mgmt(struct net_device *dev,
4339d328 63 u16 type_subtype, char *body,
ff1d2767
JM		 64 int body_len, u8 *addr, u16 tx_cb_idx);
65#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
66
67
68#ifndef PRISM2_NO_PROCFS_DEBUG
6bbefe86 69static int ap_debug_proc_show(struct seq_file *m, void *v)
ff1d2767 70{
6bbefe86
DH		 71 struct ap_data *ap = m->private;
72
73 seq_printf(m, "BridgedUnicastFrames=%u\n", ap->bridged_unicast);
74 seq_printf(m, "BridgedMulticastFrames=%u\n", ap->bridged_multicast);
75 seq_printf(m, "max_inactivity=%u\n", ap->max_inactivity / HZ);
76 seq_printf(m, "bridge_packets=%u\n", ap->bridge_packets);
77 seq_printf(m, "nullfunc_ack=%u\n", ap->nullfunc_ack);
78 seq_printf(m, "autom_ap_wds=%u\n", ap->autom_ap_wds);
79 seq_printf(m, "auth_algs=%u\n", ap->local->auth_algs);
80 seq_printf(m, "tx_drop_nonassoc=%u\n", ap->tx_drop_nonassoc);
81 return 0;
82}
ff1d2767 83
6bbefe86
DH		 84static int ap_debug_proc_open(struct inode *inode, struct file *file)
85{
86 return single_open(file, ap_debug_proc_show, PDE_DATA(inode));
ff1d2767 87}
6bbefe86
DH		 88
89static const struct file_operations ap_debug_proc_fops = {
90 .open = ap_debug_proc_open,
91 .read = seq_read,
92 .llseek = seq_lseek,
bc3041f0 93 .release = single_release,
6bbefe86 94};
ff1d2767
JM		 95#endif /* PRISM2_NO_PROCFS_DEBUG */
96
97
98static void ap_sta_hash_add(struct ap_data *ap, struct sta_info *sta)
99{
100 sta->hnext = ap->sta_hash[STA_HASH(sta->addr)];
101 ap->sta_hash[STA_HASH(sta->addr)] = sta;
102}
103
104static void ap_sta_hash_del(struct ap_data *ap, struct sta_info *sta)
105{
106 struct sta_info *s;
107
108 s = ap->sta_hash[STA_HASH(sta->addr)];
109 if (s == NULL) return;
d22fbd70 110 if (ether_addr_equal(s->addr, sta->addr)) {
ff1d2767
JM		 111 ap->sta_hash[STA_HASH(sta->addr)] = s->hnext;
112 return;
113 }
114
d22fbd70 115 while (s->hnext != NULL && !ether_addr_equal(s->hnext->addr, sta->addr))
ff1d2767
JM		 116 s = s->hnext;
117 if (s->hnext != NULL)
118 s->hnext = s->hnext->hnext;
119 else
e174961c
JB		 120 printk("AP: could not remove STA %pM from hash table\n",
121 sta->addr);
ff1d2767
JM		 122}
123
124static void ap_free_sta(struct ap_data *ap, struct sta_info *sta)
125{
126 if (sta->ap && sta->local)
127 hostap_event_expired_sta(sta->local->dev, sta);
128
129 if (ap->proc != NULL) {
130 char name[20];
e174961c 131 sprintf(name, "%pM", sta->addr);
ff1d2767
JM		 132 remove_proc_entry(name, ap->proc);
133 }
134
135 if (sta->crypt) {
136 sta->crypt->ops->deinit(sta->crypt->priv);
137 kfree(sta->crypt);
138 sta->crypt = NULL;
139 }
140
141 skb_queue_purge(&sta->tx_buf);
142
143 ap->num_sta--;
144#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
145 if (sta->aid > 0)
146 ap->sta_aid[sta->aid - 1] = NULL;
147
6f24fe30 148 if (!sta->ap)
ff1d2767 149 kfree(sta->u.sta.challenge);
72471c0d 150 del_timer_sync(&sta->timer);
ff1d2767
JM		 151#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
152
153 kfree(sta);
154}
155
156
157static void hostap_set_tim(local_info_t *local, int aid, int set)
158{
159 if (local->func->set_tim)
160 local->func->set_tim(local->dev, aid, set);
161}
162
163
164static void hostap_event_new_sta(struct net_device *dev, struct sta_info *sta)
165{
166 union iwreq_data wrqu;
167 memset(&wrqu, 0, sizeof(wrqu));
168 memcpy(wrqu.addr.sa_data, sta->addr, ETH_ALEN);
169 wrqu.addr.sa_family = ARPHRD_ETHER;
170 wireless_send_event(dev, IWEVREGISTERED, &wrqu, NULL);
171}
172
173
174static void hostap_event_expired_sta(struct net_device *dev,
175 struct sta_info *sta)
176{
177 union iwreq_data wrqu;
178 memset(&wrqu, 0, sizeof(wrqu));
179 memcpy(wrqu.addr.sa_data, sta->addr, ETH_ALEN);
180 wrqu.addr.sa_family = ARPHRD_ETHER;
181 wireless_send_event(dev, IWEVEXPIRED, &wrqu, NULL);
182}
183
184
185#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
186
187static void ap_handle_timer(unsigned long data)
188{
189 struct sta_info *sta = (struct sta_info *) data;
190 local_info_t *local;
191 struct ap_data *ap;
192 unsigned long next_time = 0;
193 int was_assoc;
194
195 if (sta == NULL || sta->local == NULL || sta->local->ap == NULL) {
196 PDEBUG(DEBUG_AP, "ap_handle_timer() called with NULL data\n");
197 return;
198 }
199
200 local = sta->local;
201 ap = local->ap;
202 was_assoc = sta->flags & WLAN_STA_ASSOC;
203
204 if (atomic_read(&sta->users) != 0)
205 next_time = jiffies + HZ;
206 else if ((sta->flags & WLAN_STA_PERM) && !(sta->flags & WLAN_STA_AUTH))
207 next_time = jiffies + ap->max_inactivity;
208
209 if (time_before(jiffies, sta->last_rx + ap->max_inactivity)) {
210 /* station activity detected; reset timeout state */
211 sta->timeout_next = STA_NULLFUNC;
212 next_time = sta->last_rx + ap->max_inactivity;
213 } else if (sta->timeout_next == STA_DISASSOC &&
214 !(sta->flags & WLAN_STA_PENDING_POLL)) {
215 /* STA ACKed data nullfunc frame poll */
216 sta->timeout_next = STA_NULLFUNC;
217 next_time = jiffies + ap->max_inactivity;
218 }
219
220 if (next_time) {
221 sta->timer.expires = next_time;
222 add_timer(&sta->timer);
223 return;
224 }
225
226 if (sta->ap)
227 sta->timeout_next = STA_DEAUTH;
228
229 if (sta->timeout_next == STA_DEAUTH && !(sta->flags & WLAN_STA_PERM)) {
230 spin_lock(&ap->sta_table_lock);
231 ap_sta_hash_del(ap, sta);
232 list_del(&sta->list);
233 spin_unlock(&ap->sta_table_lock);
234 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
235 } else if (sta->timeout_next == STA_DISASSOC)
236 sta->flags &= ~WLAN_STA_ASSOC;
237
238 if (was_assoc && !(sta->flags & WLAN_STA_ASSOC) && !sta->ap)
239 hostap_event_expired_sta(local->dev, sta);
240
241 if (sta->timeout_next == STA_DEAUTH && sta->aid > 0 &&
242 !skb_queue_empty(&sta->tx_buf)) {
243 hostap_set_tim(local, sta->aid, 0);
244 sta->flags &= ~WLAN_STA_TIM;
245 }
246
247 if (sta->ap) {
248 if (ap->autom_ap_wds) {
249 PDEBUG(DEBUG_AP, "%s: removing automatic WDS "
e174961c
JB		 250 "connection to AP %pM\n",
251 local->dev->name, sta->addr);
ff1d2767
JM		 252 hostap_wds_link_oper(local, sta->addr, WDS_DEL);
253 }
254 } else if (sta->timeout_next == STA_NULLFUNC) {
255 /* send data frame to poll STA and check whether this frame
256 * is ACKed */
4339d328 257 /* FIX: IEEE80211_STYPE_NULLFUNC would be more appropriate, but
ff1d2767
JM		 258 * it is apparently not retried so TX Exc events are not
259 * received for it */
260 sta->flags |= WLAN_STA_PENDING_POLL;
4339d328
JM		 261 prism2_send_mgmt(local->dev, IEEE80211_FTYPE_DATA |
262 IEEE80211_STYPE_DATA, NULL, 0,
ff1d2767
JM		 263 sta->addr, ap->tx_callback_poll);
264 } else {
265 int deauth = sta->timeout_next == STA_DEAUTH;
8a9faf3c 266 __le16 resp;
e174961c 267 PDEBUG(DEBUG_AP, "%s: sending %s info to STA %pM"
ff1d2767
JM		 268 "(last=%lu, jiffies=%lu)\n",
269 local->dev->name,
270 deauth ? "deauthentication" : "disassociation",
e174961c 271 sta->addr, sta->last_rx, jiffies);
ff1d2767
JM		 272
273 resp = cpu_to_le16(deauth ? WLAN_REASON_PREV_AUTH_NOT_VALID :
274 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
4339d328
JM		 275 prism2_send_mgmt(local->dev, IEEE80211_FTYPE_MGMT |
276 (deauth ? IEEE80211_STYPE_DEAUTH :
277 IEEE80211_STYPE_DISASSOC),
ff1d2767
JM		 278 (char *) &resp, 2, sta->addr, 0);
279 }
280
281 if (sta->timeout_next == STA_DEAUTH) {
282 if (sta->flags & WLAN_STA_PERM) {
e174961c 283 PDEBUG(DEBUG_AP, "%s: STA %pM"
0795af57
JP		 284 " would have been removed, "
285 "but it has 'perm' flag\n",
e174961c 286 local->dev->name, sta->addr);
ff1d2767
JM		 287 } else
288 ap_free_sta(ap, sta);
289 return;
290 }
291
292 if (sta->timeout_next == STA_NULLFUNC) {
293 sta->timeout_next = STA_DISASSOC;
294 sta->timer.expires = jiffies + AP_DISASSOC_DELAY;
295 } else {
296 sta->timeout_next = STA_DEAUTH;
297 sta->timer.expires = jiffies + AP_DEAUTH_DELAY;
298 }
299
300 add_timer(&sta->timer);
301}
302
303
304void hostap_deauth_all_stas(struct net_device *dev, struct ap_data *ap,
305 int resend)
306{
307 u8 addr[ETH_ALEN];
8a9faf3c 308 __le16 resp;
ff1d2767
JM		 309 int i;
310
311 PDEBUG(DEBUG_AP, "%s: Deauthenticate all stations\n", dev->name);
93803b33 312 eth_broadcast_addr(addr);
ff1d2767 313
8a9faf3c 314 resp = cpu_to_le16(WLAN_REASON_PREV_AUTH_NOT_VALID);
ff1d2767
JM		 315
316 /* deauth message sent; try to resend it few times; the message is
317 * broadcast, so it may be delayed until next DTIM; there is not much
318 * else we can do at this point since the driver is going to be shut
319 * down */
320 for (i = 0; i < 5; i++) {
4339d328
JM		 321 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT |
322 IEEE80211_STYPE_DEAUTH,
ff1d2767
JM		 323 (char *) &resp, 2, addr, 0);
324
325 if (!resend || ap->num_sta <= 0)
326 return;
327
328 mdelay(50);
329 }
330}
331
332
6bbefe86 333static int ap_control_proc_show(struct seq_file *m, void *v)
ff1d2767 334{
6bbefe86 335 struct ap_data *ap = m->private;
ff1d2767 336 char *policy_txt;
ff1d2767
JM		 337 struct mac_entry *entry;
338
6bbefe86
DH		 339 if (v == SEQ_START_TOKEN) {
340 switch (ap->mac_restrictions.policy) {
341 case MAC_POLICY_OPEN:
342 policy_txt = "open";
343 break;
344 case MAC_POLICY_ALLOW:
345 policy_txt = "allow";
346 break;
347 case MAC_POLICY_DENY:
348 policy_txt = "deny";
349 break;
350 default:
351 policy_txt = "unknown";
352 break;
353 }
354 seq_printf(m, "MAC policy: %s\n", policy_txt);
355 seq_printf(m, "MAC entries: %u\n", ap->mac_restrictions.entries);
356 seq_puts(m, "MAC list:\n");
ff1d2767
JM		 357 return 0;
358 }
359
6bbefe86
DH		 360 entry = v;
361 seq_printf(m, "%pM\n", entry->addr);
362 return 0;
363}
364
365static void *ap_control_proc_start(struct seq_file *m, loff_t *_pos)
366{
367 struct ap_data *ap = m->private;
ff1d2767 368 spin_lock_bh(&ap->mac_restrictions.lock);
6bbefe86
DH		 369 return seq_list_start_head(&ap->mac_restrictions.mac_list, *_pos);
370}
ff1d2767 371
6bbefe86
DH		 372static void *ap_control_proc_next(struct seq_file *m, void *v, loff_t *_pos)
373{
374 struct ap_data *ap = m->private;
375 return seq_list_next(v, &ap->mac_restrictions.mac_list, _pos);
376}
377
378static void ap_control_proc_stop(struct seq_file *m, void *v)
379{
380 struct ap_data *ap = m->private;
ff1d2767 381 spin_unlock_bh(&ap->mac_restrictions.lock);
6bbefe86
DH		 382}
383
384static const struct seq_operations ap_control_proc_seqops = {
385 .start = ap_control_proc_start,
386 .next = ap_control_proc_next,
387 .stop = ap_control_proc_stop,
388 .show = ap_control_proc_show,
389};
ff1d2767 390
6bbefe86
DH		 391static int ap_control_proc_open(struct inode *inode, struct file *file)
392{
393 int ret = seq_open(file, &ap_control_proc_seqops);
394 if (ret == 0) {
395 struct seq_file *m = file->private_data;
396 m->private = PDE_DATA(inode);
397 }
398 return ret;
ff1d2767
JM		 399}
400
6bbefe86
DH		 401static const struct file_operations ap_control_proc_fops = {
402 .open = ap_control_proc_open,
403 .read = seq_read,
404 .llseek = seq_lseek,
405 .release = seq_release,
406};
407
ff1d2767 408
5fad5a2e 409int ap_control_add_mac(struct mac_restrictions *mac_restrictions, u8 *mac)
ff1d2767
JM		 410{
411 struct mac_entry *entry;
412
413 entry = kmalloc(sizeof(struct mac_entry), GFP_KERNEL);
414 if (entry == NULL)
b53cf458 415 return -ENOMEM;
ff1d2767
JM		 416
417 memcpy(entry->addr, mac, ETH_ALEN);
418
419 spin_lock_bh(&mac_restrictions->lock);
420 list_add_tail(&entry->list, &mac_restrictions->mac_list);
421 mac_restrictions->entries++;
422 spin_unlock_bh(&mac_restrictions->lock);
423
424 return 0;
425}
426
427
5fad5a2e 428int ap_control_del_mac(struct mac_restrictions *mac_restrictions, u8 *mac)
ff1d2767
JM		 429{
430 struct list_head *ptr;
431 struct mac_entry *entry;
432
433 spin_lock_bh(&mac_restrictions->lock);
434 for (ptr = mac_restrictions->mac_list.next;
435 ptr != &mac_restrictions->mac_list; ptr = ptr->next) {
436 entry = list_entry(ptr, struct mac_entry, list);
437
d22fbd70 438 if (ether_addr_equal(entry->addr, mac)) {
ff1d2767
JM		 439 list_del(ptr);
440 kfree(entry);
441 mac_restrictions->entries--;
442 spin_unlock_bh(&mac_restrictions->lock);
443 return 0;
444 }
445 }
446 spin_unlock_bh(&mac_restrictions->lock);
447 return -1;
448}
449
450
451static int ap_control_mac_deny(struct mac_restrictions *mac_restrictions,
452 u8 *mac)
453{
ff1d2767
JM		 454 struct mac_entry *entry;
455 int found = 0;
456
457 if (mac_restrictions->policy == MAC_POLICY_OPEN)
458 return 0;
459
460 spin_lock_bh(&mac_restrictions->lock);
c1505731 461 list_for_each_entry(entry, &mac_restrictions->mac_list, list) {
d22fbd70 462 if (ether_addr_equal(entry->addr, mac)) {
ff1d2767
JM		 463 found = 1;
464 break;
465 }
466 }
467 spin_unlock_bh(&mac_restrictions->lock);
468
469 if (mac_restrictions->policy == MAC_POLICY_ALLOW)
470 return !found;
471 else
472 return found;
473}
474
475
5fad5a2e 476void ap_control_flush_macs(struct mac_restrictions *mac_restrictions)
ff1d2767
JM		 477{
478 struct list_head *ptr, *n;
479 struct mac_entry *entry;
480
481 if (mac_restrictions->entries == 0)
482 return;
483
484 spin_lock_bh(&mac_restrictions->lock);
485 for (ptr = mac_restrictions->mac_list.next, n = ptr->next;
486 ptr != &mac_restrictions->mac_list;
487 ptr = n, n = ptr->next) {
488 entry = list_entry(ptr, struct mac_entry, list);
489 list_del(ptr);
490 kfree(entry);
491 }
492 mac_restrictions->entries = 0;
493 spin_unlock_bh(&mac_restrictions->lock);
494}
495
496
5fad5a2e 497int ap_control_kick_mac(struct ap_data *ap, struct net_device *dev, u8 *mac)
ff1d2767
JM		 498{
499 struct sta_info *sta;
8a9faf3c 500 __le16 resp;
ff1d2767
JM		 501
502 spin_lock_bh(&ap->sta_table_lock);
503 sta = ap_get_sta(ap, mac);
504 if (sta) {
505 ap_sta_hash_del(ap, sta);
506 list_del(&sta->list);
507 }
508 spin_unlock_bh(&ap->sta_table_lock);
509
510 if (!sta)
511 return -EINVAL;
512
513 resp = cpu_to_le16(WLAN_REASON_PREV_AUTH_NOT_VALID);
4339d328 514 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_DEAUTH,
ff1d2767
JM		 515 (char *) &resp, 2, sta->addr, 0);
516
517 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap)
518 hostap_event_expired_sta(dev, sta);
519
520 ap_free_sta(ap, sta);
521
522 return 0;
523}
524
525#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
526
527
5fad5a2e 528void ap_control_kickall(struct ap_data *ap)
ff1d2767
JM		 529{
530 struct list_head *ptr, *n;
531 struct sta_info *sta;
74fae82c 532
ff1d2767
JM		 533 spin_lock_bh(&ap->sta_table_lock);
534 for (ptr = ap->sta_list.next, n = ptr->next; ptr != &ap->sta_list;
535 ptr = n, n = ptr->next) {
536 sta = list_entry(ptr, struct sta_info, list);
537 ap_sta_hash_del(ap, sta);
538 list_del(&sta->list);
539 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
540 hostap_event_expired_sta(sta->local->dev, sta);
541 ap_free_sta(ap, sta);
542 }
543 spin_unlock_bh(&ap->sta_table_lock);
544}
545
546
547#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
548
6bbefe86 549static int prism2_ap_proc_show(struct seq_file *m, void *v)
ff1d2767 550{
6bbefe86 551 struct sta_info *sta = v;
ff1d2767
JM		 552 int i;
553
6bbefe86
DH		 554 if (v == SEQ_START_TOKEN) {
555 seq_printf(m, "# BSSID CHAN SIGNAL NOISE RATE SSID FLAGS\n");
ff1d2767
JM		 556 return 0;
557 }
558
6bbefe86 559 if (!sta->ap)
ff1d2767 560 return 0;
6bbefe86
DH		 561
562 seq_printf(m, "%pM %d %d %d %d '",
563 sta->addr,
564 sta->u.ap.channel, sta->last_rx_signal,
565 sta->last_rx_silence, sta->last_rx_rate);
566
567 for (i = 0; i < sta->u.ap.ssid_len; i++) {
568 if (sta->u.ap.ssid[i] >= 32 && sta->u.ap.ssid[i] < 127)
569 seq_putc(m, sta->u.ap.ssid[i]);
570 else
571 seq_printf(m, "<%02x>", sta->u.ap.ssid[i]);
ff1d2767
JM		 572 }
573
6bbefe86
DH		 574 seq_putc(m, '\'');
575 if (sta->capability & WLAN_CAPABILITY_ESS)
576 seq_puts(m, " [ESS]");
577 if (sta->capability & WLAN_CAPABILITY_IBSS)
578 seq_puts(m, " [IBSS]");
579 if (sta->capability & WLAN_CAPABILITY_PRIVACY)
580 seq_puts(m, " [WEP]");
581 seq_putc(m, '\n');
582 return 0;
583}
ff1d2767 584
6bbefe86
DH		 585static void *prism2_ap_proc_start(struct seq_file *m, loff_t *_pos)
586{
587 struct ap_data *ap = m->private;
588 spin_lock_bh(&ap->sta_table_lock);
589 return seq_list_start_head(&ap->sta_list, *_pos);
590}
591
592static void *prism2_ap_proc_next(struct seq_file *m, void *v, loff_t *_pos)
593{
594 struct ap_data *ap = m->private;
595 return seq_list_next(v, &ap->sta_list, _pos);
ff1d2767 596}
6bbefe86
DH		 597
598static void prism2_ap_proc_stop(struct seq_file *m, void *v)
599{
600 struct ap_data *ap = m->private;
601 spin_unlock_bh(&ap->sta_table_lock);
602}
603
604static const struct seq_operations prism2_ap_proc_seqops = {
605 .start = prism2_ap_proc_start,
606 .next = prism2_ap_proc_next,
607 .stop = prism2_ap_proc_stop,
608 .show = prism2_ap_proc_show,
609};
610
611static int prism2_ap_proc_open(struct inode *inode, struct file *file)
612{
613 int ret = seq_open(file, &prism2_ap_proc_seqops);
614 if (ret == 0) {
615 struct seq_file *m = file->private_data;
616 m->private = PDE_DATA(inode);
617 }
618 return ret;
619}
620
621static const struct file_operations prism2_ap_proc_fops = {
622 .open = prism2_ap_proc_open,
623 .read = seq_read,
624 .llseek = seq_lseek,
625 .release = seq_release,
626};
ff1d2767
JM		 627#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
628
629
630void hostap_check_sta_fw_version(struct ap_data *ap, int sta_fw_ver)
631{
632 if (!ap)
633 return;
634
635 if (sta_fw_ver == PRISM2_FW_VER(0,8,0)) {
636 PDEBUG(DEBUG_AP, "Using data::nullfunc ACK workaround - "
637 "firmware upgrade recommended\n");
638 ap->nullfunc_ack = 1;
639 } else
640 ap->nullfunc_ack = 0;
641
642 if (sta_fw_ver == PRISM2_FW_VER(1,4,2)) {
643 printk(KERN_WARNING "%s: Warning: secondary station firmware "
644 "version 1.4.2 does not seem to work in Host AP mode\n",
645 ap->local->dev->name);
646 }
647}
648
649
650/* Called only as a tasklet (software IRQ) */
651static void hostap_ap_tx_cb(struct sk_buff *skb, int ok, void *data)
652{
653 struct ap_data *ap = data;
1ea893fd 654 struct ieee80211_hdr *hdr;
ff1d2767
JM		 655
656 if (!ap->local->hostapd || !ap->local->apdev) {
657 dev_kfree_skb(skb);
658 return;
659 }
660
ff1d2767
JM		 661 /* Pass the TX callback frame to the hostapd; use 802.11 header version
662 * 1 to indicate failure (no ACK) and 2 success (frame ACKed) */
663
1ea893fd
DW		 664 hdr = (struct ieee80211_hdr *) skb->data;
665 hdr->frame_control &= cpu_to_le16(~IEEE80211_FCTL_VERS);
666 hdr->frame_control |= cpu_to_le16(ok ? BIT(1) : BIT(0));
ff1d2767
JM		 667
668 skb->dev = ap->local->apdev;
1ea893fd 669 skb_pull(skb, hostap_80211_get_hdrlen(hdr->frame_control));
ff1d2767 670 skb->pkt_type = PACKET_OTHERHOST;
c1b4aa3f 671 skb->protocol = cpu_to_be16(ETH_P_802_2);
ff1d2767
JM		 672 memset(skb->cb, 0, sizeof(skb->cb));
673 netif_rx(skb);
674}
675
676
677#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
678/* Called only as a tasklet (software IRQ) */
679static void hostap_ap_tx_cb_auth(struct sk_buff *skb, int ok, void *data)
680{
681 struct ap_data *ap = data;
682 struct net_device *dev = ap->local->dev;
1ea893fd
DW		 683 struct ieee80211_hdr *hdr;
684 u16 auth_alg, auth_transaction, status;
8a9faf3c 685 __le16 *pos;
ff1d2767
JM		 686 struct sta_info *sta = NULL;
687 char *txt = NULL;
688
689 if (ap->local->hostapd) {
690 dev_kfree_skb(skb);
691 return;
692 }
693
1ea893fd
DW		 694 hdr = (struct ieee80211_hdr *) skb->data;
695 if (!ieee80211_is_auth(hdr->frame_control) ||
ff1d2767
JM		 696 skb->len < IEEE80211_MGMT_HDR_LEN + 6) {
697 printk(KERN_DEBUG "%s: hostap_ap_tx_cb_auth received invalid "
698 "frame\n", dev->name);
699 dev_kfree_skb(skb);
700 return;
701 }
702
8a9faf3c 703 pos = (__le16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
ff1d2767
JM		 704 auth_alg = le16_to_cpu(*pos++);
705 auth_transaction = le16_to_cpu(*pos++);
706 status = le16_to_cpu(*pos++);
707
708 if (!ok) {
709 txt = "frame was not ACKed";
710 goto done;
711 }
712
713 spin_lock(&ap->sta_table_lock);
714 sta = ap_get_sta(ap, hdr->addr1);
715 if (sta)
716 atomic_inc(&sta->users);
717 spin_unlock(&ap->sta_table_lock);
718
719 if (!sta) {
720 txt = "STA not found";
721 goto done;
722 }
723
724 if (status == WLAN_STATUS_SUCCESS &&
725 ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 2) ||
726 (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 4))) {
727 txt = "STA authenticated";
728 sta->flags |= WLAN_STA_AUTH;
729 sta->last_auth = jiffies;
730 } else if (status != WLAN_STATUS_SUCCESS)
731 txt = "authentication failed";
732
733 done:
734 if (sta)
735 atomic_dec(&sta->users);
736 if (txt) {
e174961c 737 PDEBUG(DEBUG_AP, "%s: %pM auth_cb - alg=%d "
0795af57 738 "trans#=%d status=%d - %s\n",
e174961c 739 dev->name, hdr->addr1,
21f644f3 740 auth_alg, auth_transaction, status, txt);
ff1d2767
JM		 741 }
742 dev_kfree_skb(skb);
743}
744
745
746/* Called only as a tasklet (software IRQ) */
747static void hostap_ap_tx_cb_assoc(struct sk_buff *skb, int ok, void *data)
748{
749 struct ap_data *ap = data;
750 struct net_device *dev = ap->local->dev;
1ea893fd 751 struct ieee80211_hdr *hdr;
1baf8a90 752 u16 status;
8a9faf3c 753 __le16 *pos;
ff1d2767
JM		 754 struct sta_info *sta = NULL;
755 char *txt = NULL;
756
757 if (ap->local->hostapd) {
758 dev_kfree_skb(skb);
759 return;
760 }
761
1ea893fd 762 hdr = (struct ieee80211_hdr *) skb->data;
1ea893fd
DW		 763 if ((!ieee80211_is_assoc_resp(hdr->frame_control) &&
764 !ieee80211_is_reassoc_resp(hdr->frame_control)) ||
ff1d2767
JM		 765 skb->len < IEEE80211_MGMT_HDR_LEN + 4) {
766 printk(KERN_DEBUG "%s: hostap_ap_tx_cb_assoc received invalid "
767 "frame\n", dev->name);
768 dev_kfree_skb(skb);
769 return;
770 }
771
772 if (!ok) {
773 txt = "frame was not ACKed";
774 goto done;
775 }
776
777 spin_lock(&ap->sta_table_lock);
778 sta = ap_get_sta(ap, hdr->addr1);
779 if (sta)
780 atomic_inc(&sta->users);
781 spin_unlock(&ap->sta_table_lock);
782
783 if (!sta) {
784 txt = "STA not found";
785 goto done;
786 }
787
8a9faf3c 788 pos = (__le16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
ff1d2767
JM		 789 pos++;
790 status = le16_to_cpu(*pos++);
791 if (status == WLAN_STATUS_SUCCESS) {
792 if (!(sta->flags & WLAN_STA_ASSOC))
793 hostap_event_new_sta(dev, sta);
794 txt = "STA associated";
795 sta->flags |= WLAN_STA_ASSOC;
796 sta->last_assoc = jiffies;
797 } else
798 txt = "association failed";
799
800 done:
801 if (sta)
802 atomic_dec(&sta->users);
803 if (txt) {
e174961c
JB		 804 PDEBUG(DEBUG_AP, "%s: %pM assoc_cb - %s\n",
805 dev->name, hdr->addr1, txt);
ff1d2767
JM		 806 }
807 dev_kfree_skb(skb);
808}
809
810/* Called only as a tasklet (software IRQ); TX callback for poll frames used
811 * in verifying whether the STA is still present. */
812static void hostap_ap_tx_cb_poll(struct sk_buff *skb, int ok, void *data)
813{
814 struct ap_data *ap = data;
1ea893fd 815 struct ieee80211_hdr *hdr;
ff1d2767
JM		 816 struct sta_info *sta;
817
818 if (skb->len < 24)
819 goto fail;
1ea893fd 820 hdr = (struct ieee80211_hdr *) skb->data;
ff1d2767
JM		 821 if (ok) {
822 spin_lock(&ap->sta_table_lock);
823 sta = ap_get_sta(ap, hdr->addr1);
824 if (sta)
825 sta->flags &= ~WLAN_STA_PENDING_POLL;
826 spin_unlock(&ap->sta_table_lock);
827 } else {
e174961c
JB		 828 PDEBUG(DEBUG_AP,
829 "%s: STA %pM did not ACK activity poll frame\n",
830 ap->local->dev->name, hdr->addr1);
ff1d2767
JM		 831 }
832
833 fail:
834 dev_kfree_skb(skb);
835}
836#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
837
838
839void hostap_init_data(local_info_t *local)
840{
841 struct ap_data *ap = local->ap;
842
843 if (ap == NULL) {
844 printk(KERN_WARNING "hostap_init_data: ap == NULL\n");
845 return;
846 }
847 memset(ap, 0, sizeof(struct ap_data));
848 ap->local = local;
849
850 ap->ap_policy = GET_INT_PARM(other_ap_policy, local->card_idx);
851 ap->bridge_packets = GET_INT_PARM(ap_bridge_packets, local->card_idx);
852 ap->max_inactivity =
853 GET_INT_PARM(ap_max_inactivity, local->card_idx) * HZ;
854 ap->autom_ap_wds = GET_INT_PARM(autom_ap_wds, local->card_idx);
855
856 spin_lock_init(&ap->sta_table_lock);
857 INIT_LIST_HEAD(&ap->sta_list);
858
859 /* Initialize task queue structure for AP management */
c4028958 860 INIT_WORK(&local->ap->add_sta_proc_queue, handle_add_proc_queue);
ff1d2767
JM		 861
862 ap->tx_callback_idx =
863 hostap_tx_callback_register(local, hostap_ap_tx_cb, ap);
864 if (ap->tx_callback_idx == 0)
865 printk(KERN_WARNING "%s: failed to register TX callback for "
866 "AP\n", local->dev->name);
867#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
c4028958 868 INIT_WORK(&local->ap->wds_oper_queue, handle_wds_oper_queue);
ff1d2767
JM		 869
870 ap->tx_callback_auth =
871 hostap_tx_callback_register(local, hostap_ap_tx_cb_auth, ap);
872 ap->tx_callback_assoc =
873 hostap_tx_callback_register(local, hostap_ap_tx_cb_assoc, ap);
874 ap->tx_callback_poll =
875 hostap_tx_callback_register(local, hostap_ap_tx_cb_poll, ap);
876 if (ap->tx_callback_auth == 0 || ap->tx_callback_assoc == 0 ||
877 ap->tx_callback_poll == 0)
878 printk(KERN_WARNING "%s: failed to register TX callback for "
879 "AP\n", local->dev->name);
880
881 spin_lock_init(&ap->mac_restrictions.lock);
882 INIT_LIST_HEAD(&ap->mac_restrictions.mac_list);
883#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
884
885 ap->initialized = 1;
886}
887
888
889void hostap_init_ap_proc(local_info_t *local)
890{
891 struct ap_data *ap = local->ap;
892
893 ap->proc = local->proc;
894 if (ap->proc == NULL)
895 return;
896
897#ifndef PRISM2_NO_PROCFS_DEBUG
6bbefe86 898 proc_create_data("ap_debug", 0, ap->proc, &ap_debug_proc_fops, ap);
ff1d2767
JM		 899#endif /* PRISM2_NO_PROCFS_DEBUG */
900
901#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
6bbefe86
DH		 902 proc_create_data("ap_control", 0, ap->proc, &ap_control_proc_fops, ap);
903 proc_create_data("ap", 0, ap->proc, &prism2_ap_proc_fops, ap);
ff1d2767
JM		 904#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
905
906}
907
908
909void hostap_free_data(struct ap_data *ap)
910{
c1505731 911 struct sta_info *n, *sta;
ff1d2767
JM		 912
913 if (ap == NULL || !ap->initialized) {
914 printk(KERN_DEBUG "hostap_free_data: ap has not yet been "
915 "initialized - skip resource freeing\n");
916 return;
917 }
918
43829731 919 flush_work(&ap->add_sta_proc_queue);
16359533 920
ff1d2767 921#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
43829731 922 flush_work(&ap->wds_oper_queue);
ff1d2767
JM		 923 if (ap->crypt)
924 ap->crypt->deinit(ap->crypt_priv);
925 ap->crypt = ap->crypt_priv = NULL;
926#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
927
c1505731 928 list_for_each_entry_safe(sta, n, &ap->sta_list, list) {
ff1d2767
JM		 929 ap_sta_hash_del(ap, sta);
930 list_del(&sta->list);
931 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
932 hostap_event_expired_sta(sta->local->dev, sta);
933 ap_free_sta(ap, sta);
934 }
935
936#ifndef PRISM2_NO_PROCFS_DEBUG
937 if (ap->proc != NULL) {
938 remove_proc_entry("ap_debug", ap->proc);
939 }
940#endif /* PRISM2_NO_PROCFS_DEBUG */
941
942#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
943 if (ap->proc != NULL) {
944 remove_proc_entry("ap", ap->proc);
945 remove_proc_entry("ap_control", ap->proc);
946 }
947 ap_control_flush_macs(&ap->mac_restrictions);
948#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
949
950 ap->initialized = 0;
951}
952
953
954/* caller should have mutex for AP STA list handling */
955static struct sta_info* ap_get_sta(struct ap_data *ap, u8 *sta)
956{
957 struct sta_info *s;
958
959 s = ap->sta_hash[STA_HASH(sta)];
d22fbd70 960 while (s != NULL && !ether_addr_equal(s->addr, sta))
ff1d2767
JM		 961 s = s->hnext;
962 return s;
963}
964
965
966#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
967
968/* Called from timer handler and from scheduled AP queue handlers */
969static void prism2_send_mgmt(struct net_device *dev,
4339d328 970 u16 type_subtype, char *body,
ff1d2767
JM		 971 int body_len, u8 *addr, u16 tx_cb_idx)
972{
973 struct hostap_interface *iface;
974 local_info_t *local;
1ea893fd 975 struct ieee80211_hdr *hdr;
ff1d2767
JM		 976 u16 fc;
977 struct sk_buff *skb;
978 struct hostap_skb_tx_data *meta;
979 int hdrlen;
980
981 iface = netdev_priv(dev);
982 local = iface->local;
983 dev = local->dev; /* always use master radio device */
984 iface = netdev_priv(dev);
985
986 if (!(dev->flags & IFF_UP)) {
987 PDEBUG(DEBUG_AP, "%s: prism2_send_mgmt - device is not UP - "
988 "cannot send frame\n", dev->name);
989 return;
990 }
991
992 skb = dev_alloc_skb(sizeof(*hdr) + body_len);
993 if (skb == NULL) {
994 PDEBUG(DEBUG_AP, "%s: prism2_send_mgmt failed to allocate "
995 "skb\n", dev->name);
996 return;
997 }
998
4339d328 999 fc = type_subtype;
1ea893fd 1000 hdrlen = hostap_80211_get_hdrlen(cpu_to_le16(type_subtype));
b080db58 1001 hdr = skb_put_zero(skb, hdrlen);
ff1d2767 1002 if (body)
59ae1d12 1003 skb_put_data(skb, body, body_len);
ff1d2767 1004
ff1d2767
JM		 1005 /* FIX: ctrl::ack sending used special HFA384X_TX_CTRL_802_11
1006 * tx_control instead of using local->tx_control */
1007
1008
1009 memcpy(hdr->addr1, addr, ETH_ALEN); /* DA / RA */
1ea893fd 1010 if (ieee80211_is_data(hdr->frame_control)) {
b2f4a2e3 1011 fc |= IEEE80211_FCTL_FROMDS;
ff1d2767
JM		 1012 memcpy(hdr->addr2, dev->dev_addr, ETH_ALEN); /* BSSID */
1013 memcpy(hdr->addr3, dev->dev_addr, ETH_ALEN); /* SA */
1ea893fd 1014 } else if (ieee80211_is_ctl(hdr->frame_control)) {
ff1d2767 1015 /* control:ACK does not have addr2 or addr3 */
93803b33
JP		 1016 eth_zero_addr(hdr->addr2);
1017 eth_zero_addr(hdr->addr3);
ff1d2767
JM		 1018 } else {
1019 memcpy(hdr->addr2, dev->dev_addr, ETH_ALEN); /* SA */
1020 memcpy(hdr->addr3, dev->dev_addr, ETH_ALEN); /* BSSID */
1021 }
1022
1ea893fd 1023 hdr->frame_control = cpu_to_le16(fc);
ff1d2767
JM		 1024
1025 meta = (struct hostap_skb_tx_data *) skb->cb;
1026 memset(meta, 0, sizeof(*meta));
1027 meta->magic = HOSTAP_SKB_TX_DATA_MAGIC;
1028 meta->iface = iface;
1029 meta->tx_cb_idx = tx_cb_idx;
1030
1031 skb->dev = dev;
459a98ed 1032 skb_reset_mac_header(skb);
c1d2bbe1 1033 skb_reset_network_header(skb);
ff1d2767
JM		 1034 dev_queue_xmit(skb);
1035}
1036#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1037
1038
6bbefe86 1039static int prism2_sta_proc_show(struct seq_file *m, void *v)
ff1d2767 1040{
6bbefe86 1041 struct sta_info *sta = m->private;
ff1d2767
JM		 1042 int i;
1043
1044 /* FIX: possible race condition.. the STA data could have just expired,
1045 * but proc entry was still here so that the read could have started;
1046 * some locking should be done here.. */
1047
6bbefe86
DH		 1048 seq_printf(m,
1049 "%s=%pM\nusers=%d\naid=%d\n"
1050 "flags=0x%04x%s%s%s%s%s%s%s\n"
1051 "capability=0x%02x\nlisten_interval=%d\nsupported_rates=",
1052 sta->ap ? "AP" : "STA",
1053 sta->addr, atomic_read(&sta->users), sta->aid,
1054 sta->flags,
1055 sta->flags & WLAN_STA_AUTH ? " AUTH" : "",
1056 sta->flags & WLAN_STA_ASSOC ? " ASSOC" : "",
1057 sta->flags & WLAN_STA_PS ? " PS" : "",
1058 sta->flags & WLAN_STA_TIM ? " TIM" : "",
1059 sta->flags & WLAN_STA_PERM ? " PERM" : "",
1060 sta->flags & WLAN_STA_AUTHORIZED ? " AUTHORIZED" : "",
1061 sta->flags & WLAN_STA_PENDING_POLL ? " POLL" : "",
1062 sta->capability, sta->listen_interval);
ff1d2767
JM		 1063 /* supported_rates: 500 kbit/s units with msb ignored */
1064 for (i = 0; i < sizeof(sta->supported_rates); i++)
1065 if (sta->supported_rates[i] != 0)
6bbefe86
DH		 1066 seq_printf(m, "%d%sMbps ",
1067 (sta->supported_rates[i] & 0x7f) / 2,
1068 sta->supported_rates[i] & 1 ? ".5" : "");
1069 seq_printf(m,
1070 "\njiffies=%lu\nlast_auth=%lu\nlast_assoc=%lu\n"
1071 "last_rx=%lu\nlast_tx=%lu\nrx_packets=%lu\n"
1072 "tx_packets=%lu\n"
1073 "rx_bytes=%lu\ntx_bytes=%lu\nbuffer_count=%d\n"
1074 "last_rx: silence=%d dBm signal=%d dBm rate=%d%s Mbps\n"
1075 "tx_rate=%d\ntx[1M]=%d\ntx[2M]=%d\ntx[5.5M]=%d\n"
1076 "tx[11M]=%d\n"
1077 "rx[1M]=%d\nrx[2M]=%d\nrx[5.5M]=%d\nrx[11M]=%d\n",
1078 jiffies, sta->last_auth, sta->last_assoc, sta->last_rx,
1079 sta->last_tx,
1080 sta->rx_packets, sta->tx_packets, sta->rx_bytes,
1081 sta->tx_bytes, skb_queue_len(&sta->tx_buf),
1082 sta->last_rx_silence,
1083 sta->last_rx_signal, sta->last_rx_rate / 10,
1084 sta->last_rx_rate % 10 ? ".5" : "",
1085 sta->tx_rate, sta->tx_count[0], sta->tx_count[1],
1086 sta->tx_count[2], sta->tx_count[3], sta->rx_count[0],
1087 sta->rx_count[1], sta->rx_count[2], sta->rx_count[3]);
ff1d2767 1088 if (sta->crypt && sta->crypt->ops && sta->crypt->ops->print_stats)
6bbefe86 1089 sta->crypt->ops->print_stats(m, sta->crypt->priv);
ff1d2767
JM		 1090#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1091 if (sta->ap) {
1092 if (sta->u.ap.channel >= 0)
6bbefe86
DH		 1093 seq_printf(m, "channel=%d\n", sta->u.ap.channel);
1094 seq_puts(m, "ssid=");
1095 for (i = 0; i < sta->u.ap.ssid_len; i++) {
1096 if (sta->u.ap.ssid[i] >= 32 && sta->u.ap.ssid[i] < 127)
1097 seq_putc(m, sta->u.ap.ssid[i]);
1098 else
1099 seq_printf(m, "<%02x>", sta->u.ap.ssid[i]);
1100 }
1101 seq_putc(m, '\n');
ff1d2767
JM		 1102 }
1103#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1104
6bbefe86
DH		 1105 return 0;
1106}
1107
1108static int prism2_sta_proc_open(struct inode *inode, struct file *file)
1109{
1110 return single_open(file, prism2_sta_proc_show, PDE_DATA(inode));
ff1d2767
JM		 1111}
1112
6bbefe86
DH		 1113static const struct file_operations prism2_sta_proc_fops = {
1114 .open = prism2_sta_proc_open,
1115 .read = seq_read,
1116 .llseek = seq_lseek,
bc3041f0 1117 .release = single_release,
6bbefe86 1118};
ff1d2767 1119
c4028958 1120static void handle_add_proc_queue(struct work_struct *work)
ff1d2767 1121{
c4028958
DH		 1122 struct ap_data *ap = container_of(work, struct ap_data,
1123 add_sta_proc_queue);
ff1d2767
JM		 1124 struct sta_info *sta;
1125 char name[20];
1126 struct add_sta_proc_data *entry, *prev;
1127
1128 entry = ap->add_sta_proc_entries;
1129 ap->add_sta_proc_entries = NULL;
1130
1131 while (entry) {
1132 spin_lock_bh(&ap->sta_table_lock);
1133 sta = ap_get_sta(ap, entry->addr);
1134 if (sta)
1135 atomic_inc(&sta->users);
1136 spin_unlock_bh(&ap->sta_table_lock);
1137
1138 if (sta) {
e174961c 1139 sprintf(name, "%pM", sta->addr);
6bbefe86 1140 sta->proc = proc_create_data(
ff1d2767 1141 name, 0, ap->proc,
6bbefe86 1142 &prism2_sta_proc_fops, sta);
ff1d2767
JM		 1143
1144 atomic_dec(&sta->users);
1145 }
1146
1147 prev = entry;
1148 entry = entry->next;
1149 kfree(prev);
1150 }
1151}
1152
1153
1154static struct sta_info * ap_add_sta(struct ap_data *ap, u8 *addr)
1155{
1156 struct sta_info *sta;
1157
b0471bb7 1158 sta = kzalloc(sizeof(struct sta_info), GFP_ATOMIC);
ff1d2767
JM		 1159 if (sta == NULL) {
1160 PDEBUG(DEBUG_AP, "AP: kmalloc failed\n");
1161 return NULL;
1162 }
1163
1164 /* initialize STA info data */
ff1d2767
JM		 1165 sta->local = ap->local;
1166 skb_queue_head_init(&sta->tx_buf);
1167 memcpy(sta->addr, addr, ETH_ALEN);
1168
1169 atomic_inc(&sta->users);
1170 spin_lock_bh(&ap->sta_table_lock);
1171 list_add(&sta->list, &ap->sta_list);
1172 ap->num_sta++;
1173 ap_sta_hash_add(ap, sta);
1174 spin_unlock_bh(&ap->sta_table_lock);
1175
1176 if (ap->proc) {
1177 struct add_sta_proc_data *entry;
1178 /* schedule a non-interrupt context process to add a procfs
1179 * entry for the STA since procfs code use GFP_KERNEL */
1180 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
1181 if (entry) {
1182 memcpy(entry->addr, sta->addr, ETH_ALEN);
1183 entry->next = ap->add_sta_proc_entries;
1184 ap->add_sta_proc_entries = entry;
1185 schedule_work(&ap->add_sta_proc_queue);
1186 } else
1187 printk(KERN_DEBUG "Failed to add STA proc data\n");
1188 }
1189
1190#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1191 init_timer(&sta->timer);
1192 sta->timer.expires = jiffies + ap->max_inactivity;
1193 sta->timer.data = (unsigned long) sta;
1194 sta->timer.function = ap_handle_timer;
1195 if (!ap->local->hostapd)
1196 add_timer(&sta->timer);
1197#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1198
1199 return sta;
1200}
1201
1202
1203static int ap_tx_rate_ok(int rateidx, struct sta_info *sta,
1204 local_info_t *local)
1205{
1206 if (rateidx > sta->tx_max_rate ||
1207 !(sta->tx_supp_rates & (1 << rateidx)))
1208 return 0;
1209
1210 if (local->tx_rate_control != 0 &&
1211 !(local->tx_rate_control & (1 << rateidx)))
1212 return 0;
1213
1214 return 1;
1215}
1216
1217
1218static void prism2_check_tx_rates(struct sta_info *sta)
1219{
1220 int i;
1221
1222 sta->tx_supp_rates = 0;
1223 for (i = 0; i < sizeof(sta->supported_rates); i++) {
1224 if ((sta->supported_rates[i] & 0x7f) == 2)
1225 sta->tx_supp_rates |= WLAN_RATE_1M;
1226 if ((sta->supported_rates[i] & 0x7f) == 4)
1227 sta->tx_supp_rates |= WLAN_RATE_2M;
1228 if ((sta->supported_rates[i] & 0x7f) == 11)
1229 sta->tx_supp_rates |= WLAN_RATE_5M5;
1230 if ((sta->supported_rates[i] & 0x7f) == 22)
1231 sta->tx_supp_rates |= WLAN_RATE_11M;
1232 }
1233 sta->tx_max_rate = sta->tx_rate = sta->tx_rate_idx = 0;
1234 if (sta->tx_supp_rates & WLAN_RATE_1M) {
1235 sta->tx_max_rate = 0;
1236 if (ap_tx_rate_ok(0, sta, sta->local)) {
1237 sta->tx_rate = 10;
1238 sta->tx_rate_idx = 0;
1239 }
1240 }
1241 if (sta->tx_supp_rates & WLAN_RATE_2M) {
1242 sta->tx_max_rate = 1;
1243 if (ap_tx_rate_ok(1, sta, sta->local)) {
1244 sta->tx_rate = 20;
1245 sta->tx_rate_idx = 1;
1246 }
1247 }
1248 if (sta->tx_supp_rates & WLAN_RATE_5M5) {
1249 sta->tx_max_rate = 2;
1250 if (ap_tx_rate_ok(2, sta, sta->local)) {
1251 sta->tx_rate = 55;
1252 sta->tx_rate_idx = 2;
1253 }
1254 }
1255 if (sta->tx_supp_rates & WLAN_RATE_11M) {
1256 sta->tx_max_rate = 3;
1257 if (ap_tx_rate_ok(3, sta, sta->local)) {
1258 sta->tx_rate = 110;
1259 sta->tx_rate_idx = 3;
1260 }
1261 }
1262}
1263
1264
1265#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1266
1267static void ap_crypt_init(struct ap_data *ap)
1268{
274bfb8d 1269 ap->crypt = lib80211_get_crypto_ops("WEP");
ff1d2767
JM		 1270
1271 if (ap->crypt) {
1272 if (ap->crypt->init) {
1273 ap->crypt_priv = ap->crypt->init(0);
1274 if (ap->crypt_priv == NULL)
1275 ap->crypt = NULL;
1276 else {
1277 u8 key[WEP_KEY_LEN];
1278 get_random_bytes(key, WEP_KEY_LEN);
1279 ap->crypt->set_key(key, WEP_KEY_LEN, NULL,
1280 ap->crypt_priv);
1281 }
1282 }
1283 }
1284
1285 if (ap->crypt == NULL) {
1286 printk(KERN_WARNING "AP could not initialize WEP: load module "
274bfb8d 1287 "lib80211_crypt_wep.ko\n");
ff1d2767
JM		 1288 }
1289}
1290
1291
1292/* Generate challenge data for shared key authentication. IEEE 802.11 specifies
25d1fbfd 1293 * that WEP algorithm is used for generating challenge. This should be unique,
ff1d2767
JM		 1294 * but otherwise there is not really need for randomness etc. Initialize WEP
1295 * with pseudo random key and then use increasing IV to get unique challenge
1296 * streams.
1297 *
1298 * Called only as a scheduled task for pending AP frames.
1299 */
1300static char * ap_auth_make_challenge(struct ap_data *ap)
1301{
1302 char *tmpbuf;
1303 struct sk_buff *skb;
1304
1305 if (ap->crypt == NULL) {
1306 ap_crypt_init(ap);
1307 if (ap->crypt == NULL)
1308 return NULL;
1309 }
1310
5cbded58 1311 tmpbuf = kmalloc(WLAN_AUTH_CHALLENGE_LEN, GFP_ATOMIC);
ff1d2767
JM		 1312 if (tmpbuf == NULL) {
1313 PDEBUG(DEBUG_AP, "AP: kmalloc failed for challenge\n");
1314 return NULL;
1315 }
1316
1317 skb = dev_alloc_skb(WLAN_AUTH_CHALLENGE_LEN +
5bfc819b
JK		 1318 ap->crypt->extra_mpdu_prefix_len +
1319 ap->crypt->extra_mpdu_postfix_len);
ff1d2767
JM		 1320 if (skb == NULL) {
1321 kfree(tmpbuf);
1322 return NULL;
1323 }
1324
5bfc819b 1325 skb_reserve(skb, ap->crypt->extra_mpdu_prefix_len);
b080db58 1326 skb_put_zero(skb, WLAN_AUTH_CHALLENGE_LEN);
ff1d2767
JM		 1327 if (ap->crypt->encrypt_mpdu(skb, 0, ap->crypt_priv)) {
1328 dev_kfree_skb(skb);
1329 kfree(tmpbuf);
1330 return NULL;
1331 }
1332
d626f62b
ACM		 1333 skb_copy_from_linear_data_offset(skb, ap->crypt->extra_mpdu_prefix_len,
1334 tmpbuf, WLAN_AUTH_CHALLENGE_LEN);
ff1d2767
JM		 1335 dev_kfree_skb(skb);
1336
1337 return tmpbuf;
1338}
1339
1340
1341/* Called only as a scheduled task for pending AP frames. */
1342static void handle_authen(local_info_t *local, struct sk_buff *skb,
1343 struct hostap_80211_rx_status *rx_stats)
1344{
1345 struct net_device *dev = local->dev;
1ea893fd 1346 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
ff1d2767
JM		 1347 size_t hdrlen;
1348 struct ap_data *ap = local->ap;
1349 char body[8 + WLAN_AUTH_CHALLENGE_LEN], *challenge = NULL;
1350 int len, olen;
8a9faf3c
AV		 1351 u16 auth_alg, auth_transaction, status_code;
1352 __le16 *pos;
1ea893fd 1353 u16 resp = WLAN_STATUS_SUCCESS;
ff1d2767 1354 struct sta_info *sta = NULL;
274bfb8d 1355 struct lib80211_crypt_data *crypt;
ff1d2767
JM		 1356 char *txt = "";
1357
1358 len = skb->len - IEEE80211_MGMT_HDR_LEN;
1359
1ea893fd 1360 hdrlen = hostap_80211_get_hdrlen(hdr->frame_control);
ff1d2767
JM		 1361
1362 if (len < 6) {
1363 PDEBUG(DEBUG_AP, "%s: handle_authen - too short payload "
e174961c 1364 "(len=%d) from %pM\n", dev->name, len, hdr->addr2);
ff1d2767
JM		 1365 return;
1366 }
1367
1368 spin_lock_bh(&local->ap->sta_table_lock);
1369 sta = ap_get_sta(local->ap, hdr->addr2);
1370 if (sta)
1371 atomic_inc(&sta->users);
1372 spin_unlock_bh(&local->ap->sta_table_lock);
1373
1374 if (sta && sta->crypt)
1375 crypt = sta->crypt;
1376 else {
1377 int idx = 0;
1378 if (skb->len >= hdrlen + 3)
1379 idx = skb->data[hdrlen + 3] >> 6;
274bfb8d 1380 crypt = local->crypt_info.crypt[idx];
ff1d2767
JM		 1381 }
1382
8a9faf3c 1383 pos = (__le16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
ff1d2767
JM		 1384 auth_alg = __le16_to_cpu(*pos);
1385 pos++;
1386 auth_transaction = __le16_to_cpu(*pos);
1387 pos++;
1388 status_code = __le16_to_cpu(*pos);
1389 pos++;
1390
d22fbd70 1391 if (ether_addr_equal(dev->dev_addr, hdr->addr2) ||
ff1d2767
JM		 1392 ap_control_mac_deny(&ap->mac_restrictions, hdr->addr2)) {
1393 txt = "authentication denied";
1394 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1395 goto fail;
1396 }
1397
1398 if (((local->auth_algs & PRISM2_AUTH_OPEN) &&
1399 auth_alg == WLAN_AUTH_OPEN) ||
1400 ((local->auth_algs & PRISM2_AUTH_SHARED_KEY) &&
1401 crypt && auth_alg == WLAN_AUTH_SHARED_KEY)) {
1402 } else {
1403 txt = "unsupported algorithm";
1404 resp = WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG;
1405 goto fail;
1406 }
1407
1408 if (len >= 8) {
1409 u8 *u = (u8 *) pos;
1410 if (*u == WLAN_EID_CHALLENGE) {
1411 if (*(u + 1) != WLAN_AUTH_CHALLENGE_LEN) {
1412 txt = "invalid challenge len";
1413 resp = WLAN_STATUS_CHALLENGE_FAIL;
1414 goto fail;
1415 }
1416 if (len - 8 < WLAN_AUTH_CHALLENGE_LEN) {
1417 txt = "challenge underflow";
1418 resp = WLAN_STATUS_CHALLENGE_FAIL;
1419 goto fail;
1420 }
1421 challenge = (char *) (u + 2);
1422 }
1423 }
1424
1425 if (sta && sta->ap) {
1426 if (time_after(jiffies, sta->u.ap.last_beacon +
1427 (10 * sta->listen_interval * HZ) / 1024)) {
1428 PDEBUG(DEBUG_AP, "%s: no beacons received for a while,"
e174961c
JB		 1429 " assuming AP %pM is now STA\n",
1430 dev->name, sta->addr);
ff1d2767
JM		 1431 sta->ap = 0;
1432 sta->flags = 0;
1433 sta->u.sta.challenge = NULL;
1434 } else {
1435 txt = "AP trying to authenticate?";
1436 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1437 goto fail;
1438 }
1439 }
1440
1441 if ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 1) ||
1442 (auth_alg == WLAN_AUTH_SHARED_KEY &&
1443 (auth_transaction == 1 ||
1444 (auth_transaction == 3 && sta != NULL &&
1445 sta->u.sta.challenge != NULL)))) {
1446 } else {
1447 txt = "unknown authentication transaction number";
1448 resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION;
1449 goto fail;
1450 }
1451
1452 if (sta == NULL) {
1453 txt = "new STA";
1454
1455 if (local->ap->num_sta >= MAX_STA_COUNT) {
1456 /* FIX: might try to remove some old STAs first? */
1457 txt = "no more room for new STAs";
1458 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1459 goto fail;
1460 }
1461
1462 sta = ap_add_sta(local->ap, hdr->addr2);
1463 if (sta == NULL) {
1464 txt = "ap_add_sta failed";
1465 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1466 goto fail;
1467 }
1468 }
1469
1470 switch (auth_alg) {
1471 case WLAN_AUTH_OPEN:
1472 txt = "authOK";
1473 /* IEEE 802.11 standard is not completely clear about
1474 * whether STA is considered authenticated after
1475 * authentication OK frame has been send or after it
1476 * has been ACKed. In order to reduce interoperability
1477 * issues, mark the STA authenticated before ACK. */
1478 sta->flags |= WLAN_STA_AUTH;
1479 break;
1480
1481 case WLAN_AUTH_SHARED_KEY:
1482 if (auth_transaction == 1) {
1483 if (sta->u.sta.challenge == NULL) {
1484 sta->u.sta.challenge =
1485 ap_auth_make_challenge(local->ap);
1486 if (sta->u.sta.challenge == NULL) {
1487 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1488 goto fail;
1489 }
1490 }
1491 } else {
1492 if (sta->u.sta.challenge == NULL ||
1493 challenge == NULL ||
1494 memcmp(sta->u.sta.challenge, challenge,
1495 WLAN_AUTH_CHALLENGE_LEN) != 0 ||
1ea893fd 1496 !ieee80211_has_protected(hdr->frame_control)) {
ff1d2767
JM		 1497 txt = "challenge response incorrect";
1498 resp = WLAN_STATUS_CHALLENGE_FAIL;
1499 goto fail;
1500 }
1501
1502 txt = "challenge OK - authOK";
1503 /* IEEE 802.11 standard is not completely clear about
1504 * whether STA is considered authenticated after
1505 * authentication OK frame has been send or after it
1506 * has been ACKed. In order to reduce interoperability
1507 * issues, mark the STA authenticated before ACK. */
1508 sta->flags |= WLAN_STA_AUTH;
1509 kfree(sta->u.sta.challenge);
1510 sta->u.sta.challenge = NULL;
1511 }
1512 break;
1513 }
1514
1515 fail:
8a9faf3c 1516 pos = (__le16 *) body;
ff1d2767
JM		 1517 *pos = cpu_to_le16(auth_alg);
1518 pos++;
1519 *pos = cpu_to_le16(auth_transaction + 1);
1520 pos++;
1521 *pos = cpu_to_le16(resp); /* status_code */
1522 pos++;
1523 olen = 6;
1524
1525 if (resp == WLAN_STATUS_SUCCESS && sta != NULL &&
1526 sta->u.sta.challenge != NULL &&
1527 auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 1) {
1528 u8 *tmp = (u8 *) pos;
1529 *tmp++ = WLAN_EID_CHALLENGE;
1530 *tmp++ = WLAN_AUTH_CHALLENGE_LEN;
1531 pos++;
1532 memcpy(pos, sta->u.sta.challenge, WLAN_AUTH_CHALLENGE_LEN);
1533 olen += 2 + WLAN_AUTH_CHALLENGE_LEN;
1534 }
1535
4339d328 1536 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_AUTH,
ff1d2767
JM		 1537 body, olen, hdr->addr2, ap->tx_callback_auth);
1538
1539 if (sta) {
1540 sta->last_rx = jiffies;
1541 atomic_dec(&sta->users);
1542 }
1543
1544 if (resp) {
e174961c 1545 PDEBUG(DEBUG_AP, "%s: %pM auth (alg=%d "
0795af57 1546 "trans#=%d stat=%d len=%d fc=%04x) ==> %d (%s)\n",
e174961c 1547 dev->name, hdr->addr2,
21f644f3 1548 auth_alg, auth_transaction, status_code, len,
1ea893fd 1549 le16_to_cpu(hdr->frame_control), resp, txt);
ff1d2767
JM		 1550 }
1551}
1552
1553
1554/* Called only as a scheduled task for pending AP frames. */
1555static void handle_assoc(local_info_t *local, struct sk_buff *skb,
1556 struct hostap_80211_rx_status *rx_stats, int reassoc)
1557{
1558 struct net_device *dev = local->dev;
1ea893fd 1559 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
ff1d2767
JM		 1560 char body[12], *p, *lpos;
1561 int len, left;
8a9faf3c 1562 __le16 *pos;
ff1d2767
JM		 1563 u16 resp = WLAN_STATUS_SUCCESS;
1564 struct sta_info *sta = NULL;
1565 int send_deauth = 0;
1566 char *txt = "";
1567 u8 prev_ap[ETH_ALEN];
1568
1569 left = len = skb->len - IEEE80211_MGMT_HDR_LEN;
1570
1571 if (len < (reassoc ? 10 : 4)) {
1572 PDEBUG(DEBUG_AP, "%s: handle_assoc - too short payload "
e174961c
JB		 1573 "(len=%d, reassoc=%d) from %pM\n",
1574 dev->name, len, reassoc, hdr->addr2);
ff1d2767
JM		 1575 return;
1576 }
1577
1578 spin_lock_bh(&local->ap->sta_table_lock);
1579 sta = ap_get_sta(local->ap, hdr->addr2);
1580 if (sta == NULL || (sta->flags & WLAN_STA_AUTH) == 0) {
1581 spin_unlock_bh(&local->ap->sta_table_lock);
1582 txt = "trying to associate before authentication";
1583 send_deauth = 1;
1584 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1585 sta = NULL; /* do not decrement sta->users */
1586 goto fail;
1587 }
1588 atomic_inc(&sta->users);
1589 spin_unlock_bh(&local->ap->sta_table_lock);
1590
8a9faf3c 1591 pos = (__le16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
ff1d2767
JM		 1592 sta->capability = __le16_to_cpu(*pos);
1593 pos++; left -= 2;
1594 sta->listen_interval = __le16_to_cpu(*pos);
1595 pos++; left -= 2;
1596
1597 if (reassoc) {
1598 memcpy(prev_ap, pos, ETH_ALEN);
1599 pos++; pos++; pos++; left -= 6;
1600 } else
93803b33 1601 eth_zero_addr(prev_ap);
ff1d2767
JM		 1602
1603 if (left >= 2) {
1604 unsigned int ileft;
1605 unsigned char *u = (unsigned char *) pos;
1606
1607 if (*u == WLAN_EID_SSID) {
1608 u++; left--;
1609 ileft = *u;
1610 u++; left--;
1611
1612 if (ileft > left || ileft > MAX_SSID_LEN) {
1613 txt = "SSID overflow";
1614 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1615 goto fail;
1616 }
1617
1618 if (ileft != strlen(local->essid) ||
1619 memcmp(local->essid, u, ileft) != 0) {
1620 txt = "not our SSID";
1621 resp = WLAN_STATUS_ASSOC_DENIED_UNSPEC;
1622 goto fail;
1623 }
1624
1625 u += ileft;
1626 left -= ileft;
1627 }
1628
1629 if (left >= 2 && *u == WLAN_EID_SUPP_RATES) {
1630 u++; left--;
1631 ileft = *u;
1632 u++; left--;
74fae82c 1633
ff1d2767
JM		 1634 if (ileft > left || ileft == 0 ||
1635 ileft > WLAN_SUPP_RATES_MAX) {
1636 txt = "SUPP_RATES len error";
1637 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1638 goto fail;
1639 }
1640
1641 memset(sta->supported_rates, 0,
1642 sizeof(sta->supported_rates));
1643 memcpy(sta->supported_rates, u, ileft);
1644 prism2_check_tx_rates(sta);
1645
1646 u += ileft;
1647 left -= ileft;
1648 }
1649
1650 if (left > 0) {
e174961c 1651 PDEBUG(DEBUG_AP, "%s: assoc from %pM"
0795af57 1652 " with extra data (%d bytes) [",
e174961c 1653 dev->name, hdr->addr2, left);
ff1d2767
JM		 1654 while (left > 0) {
1655 PDEBUG2(DEBUG_AP, "<%02x>", *u);
1656 u++; left--;
1657 }
1658 PDEBUG2(DEBUG_AP, "]\n");
1659 }
1660 } else {
1661 txt = "frame underflow";
1662 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1663 goto fail;
1664 }
1665
1666 /* get a unique AID */
1667 if (sta->aid > 0)
1668 txt = "OK, old AID";
1669 else {
1670 spin_lock_bh(&local->ap->sta_table_lock);
1671 for (sta->aid = 1; sta->aid <= MAX_AID_TABLE_SIZE; sta->aid++)
1672 if (local->ap->sta_aid[sta->aid - 1] == NULL)
1673 break;
1674 if (sta->aid > MAX_AID_TABLE_SIZE) {
1675 sta->aid = 0;
1676 spin_unlock_bh(&local->ap->sta_table_lock);
1677 resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
1678 txt = "no room for more AIDs";
1679 } else {
1680 local->ap->sta_aid[sta->aid - 1] = sta;
1681 spin_unlock_bh(&local->ap->sta_table_lock);
1682 txt = "OK, new AID";
1683 }
1684 }
1685
1686 fail:
8a9faf3c 1687 pos = (__le16 *) body;
ff1d2767
JM		 1688
1689 if (send_deauth) {
8a9faf3c 1690 *pos = cpu_to_le16(WLAN_REASON_STA_REQ_ASSOC_WITHOUT_AUTH);
ff1d2767
JM		 1691 pos++;
1692 } else {
1693 /* FIX: CF-Pollable and CF-PollReq should be set to match the
1694 * values in beacons/probe responses */
1695 /* FIX: how about privacy and WEP? */
1696 /* capability */
8a9faf3c 1697 *pos = cpu_to_le16(WLAN_CAPABILITY_ESS);
ff1d2767
JM		 1698 pos++;
1699
1700 /* status_code */
8a9faf3c 1701 *pos = cpu_to_le16(resp);
ff1d2767
JM		 1702 pos++;
1703
8a9faf3c 1704 *pos = cpu_to_le16((sta && sta->aid > 0 ? sta->aid : 0) |
ff1d2767
JM		 1705 BIT(14) | BIT(15)); /* AID */
1706 pos++;
1707
1708 /* Supported rates (Information element) */
1709 p = (char *) pos;
1710 *p++ = WLAN_EID_SUPP_RATES;
1711 lpos = p;
1712 *p++ = 0; /* len */
1713 if (local->tx_rate_control & WLAN_RATE_1M) {
1714 *p++ = local->basic_rates & WLAN_RATE_1M ? 0x82 : 0x02;
1715 (*lpos)++;
1716 }
1717 if (local->tx_rate_control & WLAN_RATE_2M) {
1718 *p++ = local->basic_rates & WLAN_RATE_2M ? 0x84 : 0x04;
1719 (*lpos)++;
1720 }
1721 if (local->tx_rate_control & WLAN_RATE_5M5) {
1722 *p++ = local->basic_rates & WLAN_RATE_5M5 ?
1723 0x8b : 0x0b;
1724 (*lpos)++;
1725 }
1726 if (local->tx_rate_control & WLAN_RATE_11M) {
1727 *p++ = local->basic_rates & WLAN_RATE_11M ?
1728 0x96 : 0x16;
1729 (*lpos)++;
1730 }
8a9faf3c 1731 pos = (__le16 *) p;
ff1d2767
JM		 1732 }
1733
4339d328
JM		 1734 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT |
1735 (send_deauth ? IEEE80211_STYPE_DEAUTH :
1736 (reassoc ? IEEE80211_STYPE_REASSOC_RESP :
1737 IEEE80211_STYPE_ASSOC_RESP)),
ff1d2767
JM		 1738 body, (u8 *) pos - (u8 *) body,
1739 hdr->addr2,
1740 send_deauth ? 0 : local->ap->tx_callback_assoc);
1741
1742 if (sta) {
1743 if (resp == WLAN_STATUS_SUCCESS) {
1744 sta->last_rx = jiffies;
1745 /* STA will be marked associated from TX callback, if
1746 * AssocResp is ACKed */
1747 }
1748 atomic_dec(&sta->users);
1749 }
1750
1751#if 0
e174961c
JB		 1752 PDEBUG(DEBUG_AP, "%s: %pM %sassoc (len=%d "
1753 "prev_ap=%pM) => %d(%d) (%s)\n",
21f644f3 1754 dev->name,
e174961c 1755 hdr->addr2,
21f644f3 1756 reassoc ? "re" : "", len,
e174961c 1757 prev_ap,
21f644f3 1758 resp, send_deauth, txt);
ff1d2767
JM		 1759#endif
1760}
1761
1762
1763/* Called only as a scheduled task for pending AP frames. */
1764static void handle_deauth(local_info_t *local, struct sk_buff *skb,
1765 struct hostap_80211_rx_status *rx_stats)
1766{
1767 struct net_device *dev = local->dev;
1ea893fd 1768 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
ff1d2767
JM		 1769 char *body = (char *) (skb->data + IEEE80211_MGMT_HDR_LEN);
1770 int len;
8a9faf3c
AV		 1771 u16 reason_code;
1772 __le16 *pos;
ff1d2767
JM		 1773 struct sta_info *sta = NULL;
1774
1775 len = skb->len - IEEE80211_MGMT_HDR_LEN;
1776
1777 if (len < 2) {
1778 printk("handle_deauth - too short payload (len=%d)\n", len);
1779 return;
1780 }
1781
8a9faf3c
AV		 1782 pos = (__le16 *) body;
1783 reason_code = le16_to_cpu(*pos);
ff1d2767 1784
e174961c
JB		 1785 PDEBUG(DEBUG_AP, "%s: deauthentication: %pM len=%d, "
1786 "reason_code=%d\n", dev->name, hdr->addr2,
21f644f3 1787 len, reason_code);
ff1d2767
JM		 1788
1789 spin_lock_bh(&local->ap->sta_table_lock);
1790 sta = ap_get_sta(local->ap, hdr->addr2);
1791 if (sta != NULL) {
1792 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap)
1793 hostap_event_expired_sta(local->dev, sta);
1794 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
1795 }
1796 spin_unlock_bh(&local->ap->sta_table_lock);
1797 if (sta == NULL) {
e174961c 1798 printk("%s: deauthentication from %pM, "
ff1d2767 1799 "reason_code=%d, but STA not authenticated\n", dev->name,
e174961c 1800 hdr->addr2, reason_code);
ff1d2767
JM		 1801 }
1802}
1803
1804
1805/* Called only as a scheduled task for pending AP frames. */
1806static void handle_disassoc(local_info_t *local, struct sk_buff *skb,
1807 struct hostap_80211_rx_status *rx_stats)
1808{
1809 struct net_device *dev = local->dev;
1ea893fd 1810 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
ff1d2767
JM		 1811 char *body = skb->data + IEEE80211_MGMT_HDR_LEN;
1812 int len;
8a9faf3c
AV		 1813 u16 reason_code;
1814 __le16 *pos;
ff1d2767
JM		 1815 struct sta_info *sta = NULL;
1816
1817 len = skb->len - IEEE80211_MGMT_HDR_LEN;
1818
1819 if (len < 2) {
1820 printk("handle_disassoc - too short payload (len=%d)\n", len);
1821 return;
1822 }
1823
8a9faf3c
AV		 1824 pos = (__le16 *) body;
1825 reason_code = le16_to_cpu(*pos);
ff1d2767 1826
e174961c
JB		 1827 PDEBUG(DEBUG_AP, "%s: disassociation: %pM len=%d, "
1828 "reason_code=%d\n", dev->name, hdr->addr2,
21f644f3 1829 len, reason_code);
ff1d2767
JM		 1830
1831 spin_lock_bh(&local->ap->sta_table_lock);
1832 sta = ap_get_sta(local->ap, hdr->addr2);
1833 if (sta != NULL) {
1834 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap)
1835 hostap_event_expired_sta(local->dev, sta);
1836 sta->flags &= ~WLAN_STA_ASSOC;
1837 }
1838 spin_unlock_bh(&local->ap->sta_table_lock);
1839 if (sta == NULL) {
e174961c 1840 printk("%s: disassociation from %pM, "
ff1d2767 1841 "reason_code=%d, but STA not authenticated\n",
e174961c 1842 dev->name, hdr->addr2, reason_code);
ff1d2767
JM		 1843 }
1844}
1845
1846
1847/* Called only as a scheduled task for pending AP frames. */
1848static void ap_handle_data_nullfunc(local_info_t *local,
1ea893fd 1849 struct ieee80211_hdr *hdr)
ff1d2767
JM		 1850{
1851 struct net_device *dev = local->dev;
1852
1853 /* some STA f/w's seem to require control::ACK frame for
1854 * data::nullfunc, but at least Prism2 station f/w version 0.8.0 does
1855 * not send this..
1856 * send control::ACK for the data::nullfunc */
1857
1858 printk(KERN_DEBUG "Sending control::ACK for data::nullfunc\n");
4339d328 1859 prism2_send_mgmt(dev, IEEE80211_FTYPE_CTL | IEEE80211_STYPE_ACK,
ff1d2767
JM		 1860 NULL, 0, hdr->addr2, 0);
1861}
1862
1863
1864/* Called only as a scheduled task for pending AP frames. */
1865static void ap_handle_dropped_data(local_info_t *local,
1ea893fd 1866 struct ieee80211_hdr *hdr)
ff1d2767
JM		 1867{
1868 struct net_device *dev = local->dev;
1869 struct sta_info *sta;
8a9faf3c 1870 __le16 reason;
ff1d2767
JM		 1871
1872 spin_lock_bh(&local->ap->sta_table_lock);
1873 sta = ap_get_sta(local->ap, hdr->addr2);
1874 if (sta)
1875 atomic_inc(&sta->users);
1876 spin_unlock_bh(&local->ap->sta_table_lock);
1877
1878 if (sta != NULL && (sta->flags & WLAN_STA_ASSOC)) {
1879 PDEBUG(DEBUG_AP, "ap_handle_dropped_data: STA is now okay?\n");
1880 atomic_dec(&sta->users);
1881 return;
1882 }
1883
8a9faf3c 1884 reason = cpu_to_le16(WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
4339d328 1885 prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT |
ff1d2767 1886 ((sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) ?
4339d328 1887 IEEE80211_STYPE_DEAUTH : IEEE80211_STYPE_DISASSOC),
ff1d2767
JM		 1888 (char *) &reason, sizeof(reason), hdr->addr2, 0);
1889
1890 if (sta)
1891 atomic_dec(&sta->users);
1892}
1893
1894#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1895
1896
1897/* Called only as a scheduled task for pending AP frames. */
1898static void pspoll_send_buffered(local_info_t *local, struct sta_info *sta,
1899 struct sk_buff *skb)
1900{
5bee720f
JM		 1901 struct hostap_skb_tx_data *meta;
1902
ff1d2767
JM		 1903 if (!(sta->flags & WLAN_STA_PS)) {
1904 /* Station has moved to non-PS mode, so send all buffered
1905 * frames using normal device queue. */
1906 dev_queue_xmit(skb);
1907 return;
1908 }
1909
1910 /* add a flag for hostap_handle_sta_tx() to know that this skb should
1911 * be passed through even though STA is using PS */
5bee720f
JM		 1912 meta = (struct hostap_skb_tx_data *) skb->cb;
1913 meta->flags |= HOSTAP_TX_FLAGS_BUFFERED_FRAME;
ff1d2767
JM		 1914 if (!skb_queue_empty(&sta->tx_buf)) {
1915 /* indicate to STA that more frames follow */
5bee720f 1916 meta->flags |= HOSTAP_TX_FLAGS_ADD_MOREDATA;
ff1d2767
JM		 1917 }
1918 dev_queue_xmit(skb);
1919}
1920
1921
1922/* Called only as a scheduled task for pending AP frames. */
1923static void handle_pspoll(local_info_t *local,
1ea893fd 1924 struct ieee80211_hdr *hdr,
ff1d2767
JM		 1925 struct hostap_80211_rx_status *rx_stats)
1926{
1927 struct net_device *dev = local->dev;
1928 struct sta_info *sta;
1929 u16 aid;
1930 struct sk_buff *skb;
1931
e174961c 1932 PDEBUG(DEBUG_PS2, "handle_pspoll: BSSID=%pM, TA=%pM PWRMGT=%d\n",
1ea893fd 1933 hdr->addr1, hdr->addr2, !!ieee80211_has_pm(hdr->frame_control));
ff1d2767 1934
d22fbd70 1935 if (!ether_addr_equal(hdr->addr1, dev->dev_addr)) {
e174961c
JB		 1936 PDEBUG(DEBUG_AP,
1937 "handle_pspoll - addr1(BSSID)=%pM not own MAC\n",
1938 hdr->addr1);
ff1d2767
JM		 1939 return;
1940 }
1941
8a9faf3c 1942 aid = le16_to_cpu(hdr->duration_id);
ff1d2767
JM		 1943 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) {
1944 PDEBUG(DEBUG_PS, " PSPOLL and AID[15:14] not set\n");
1945 return;
1946 }
1bcca3c4 1947 aid &= ~(BIT(15) | BIT(14));
ff1d2767
JM		 1948 if (aid == 0 || aid > MAX_AID_TABLE_SIZE) {
1949 PDEBUG(DEBUG_PS, " invalid aid=%d\n", aid);
1950 return;
1951 }
1952 PDEBUG(DEBUG_PS2, " aid=%d\n", aid);
1953
1954 spin_lock_bh(&local->ap->sta_table_lock);
1955 sta = ap_get_sta(local->ap, hdr->addr2);
1956 if (sta)
1957 atomic_inc(&sta->users);
1958 spin_unlock_bh(&local->ap->sta_table_lock);
1959
1960 if (sta == NULL) {
1961 PDEBUG(DEBUG_PS, " STA not found\n");
1962 return;
1963 }
1964 if (sta->aid != aid) {
1965 PDEBUG(DEBUG_PS, " received aid=%i does not match with "
1966 "assoc.aid=%d\n", aid, sta->aid);
1967 return;
1968 }
1969
1970 /* FIX: todo:
1971 * - add timeout for buffering (clear aid in TIM vector if buffer timed
1972 * out (expiry time must be longer than ListenInterval for
1973 * the corresponding STA; "8802-11: 11.2.1.9 AP aging function"
1974 * - what to do, if buffered, pspolled, and sent frame is not ACKed by
1975 * sta; store buffer for later use and leave TIM aid bit set? use
1976 * TX event to check whether frame was ACKed?
1977 */
1978
1979 while ((skb = skb_dequeue(&sta->tx_buf)) != NULL) {
1980 /* send buffered frame .. */
1981 PDEBUG(DEBUG_PS2, "Sending buffered frame to STA after PS POLL"
1982 " (buffer_count=%d)\n", skb_queue_len(&sta->tx_buf));
1983
1984 pspoll_send_buffered(local, sta, skb);
1985
1986 if (sta->flags & WLAN_STA_PS) {
1987 /* send only one buffered packet per PS Poll */
1988 /* FIX: should ignore further PS Polls until the
1989 * buffered packet that was just sent is acknowledged
1990 * (Tx or TxExc event) */
1991 break;
1992 }
1993 }
1994
1995 if (skb_queue_empty(&sta->tx_buf)) {
1996 /* try to clear aid from TIM */
1997 if (!(sta->flags & WLAN_STA_TIM))
1998 PDEBUG(DEBUG_PS2, "Re-unsetting TIM for aid %d\n",
1999 aid);
2000 hostap_set_tim(local, aid, 0);
2001 sta->flags &= ~WLAN_STA_TIM;
2002 }
2003
2004 atomic_dec(&sta->users);
2005}
2006
2007
2008#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2009
c4028958 2010static void handle_wds_oper_queue(struct work_struct *work)
ff1d2767 2011{
c4028958
DH		 2012 struct ap_data *ap = container_of(work, struct ap_data,
2013 wds_oper_queue);
2014 local_info_t *local = ap->local;
ff1d2767
JM		 2015 struct wds_oper_data *entry, *prev;
2016
2017 spin_lock_bh(&local->lock);
2018 entry = local->ap->wds_oper_entries;
2019 local->ap->wds_oper_entries = NULL;
2020 spin_unlock_bh(&local->lock);
2021
2022 while (entry) {
2023 PDEBUG(DEBUG_AP, "%s: %s automatic WDS connection "
e174961c 2024 "to AP %pM\n",
ff1d2767
JM		 2025 local->dev->name,
2026 entry->type == WDS_ADD ? "adding" : "removing",
e174961c 2027 entry->addr);
ff1d2767
JM		 2028 if (entry->type == WDS_ADD)
2029 prism2_wds_add(local, entry->addr, 0);
2030 else if (entry->type == WDS_DEL)
2031 prism2_wds_del(local, entry->addr, 0, 1);
2032
2033 prev = entry;
2034 entry = entry->next;
2035 kfree(prev);
2036 }
2037}
2038
2039
2040/* Called only as a scheduled task for pending AP frames. */
2041static void handle_beacon(local_info_t *local, struct sk_buff *skb,
2042 struct hostap_80211_rx_status *rx_stats)
2043{
1ea893fd 2044 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
ff1d2767
JM		 2045 char *body = skb->data + IEEE80211_MGMT_HDR_LEN;
2046 int len, left;
8a9faf3c
AV		 2047 u16 beacon_int, capability;
2048 __le16 *pos;
ff1d2767
JM		 2049 char *ssid = NULL;
2050 unsigned char *supp_rates = NULL;
2051 int ssid_len = 0, supp_rates_len = 0;
2052 struct sta_info *sta = NULL;
2053 int new_sta = 0, channel = -1;
2054
2055 len = skb->len - IEEE80211_MGMT_HDR_LEN;
2056
2057 if (len < 8 + 2 + 2) {
2058 printk(KERN_DEBUG "handle_beacon - too short payload "
2059 "(len=%d)\n", len);
2060 return;
2061 }
2062
8a9faf3c 2063 pos = (__le16 *) body;
ff1d2767
JM		 2064 left = len;
2065
2066 /* Timestamp (8 octets) */
2067 pos += 4; left -= 8;
2068 /* Beacon interval (2 octets) */
8a9faf3c 2069 beacon_int = le16_to_cpu(*pos);
ff1d2767
JM		 2070 pos++; left -= 2;
2071 /* Capability information (2 octets) */
8a9faf3c 2072 capability = le16_to_cpu(*pos);
ff1d2767
JM		 2073 pos++; left -= 2;
2074
2075 if (local->ap->ap_policy != AP_OTHER_AP_EVEN_IBSS &&
2076 capability & WLAN_CAPABILITY_IBSS)
2077 return;
2078
2079 if (left >= 2) {
2080 unsigned int ileft;
2081 unsigned char *u = (unsigned char *) pos;
2082
2083 if (*u == WLAN_EID_SSID) {
2084 u++; left--;
2085 ileft = *u;
2086 u++; left--;
2087
2088 if (ileft > left || ileft > MAX_SSID_LEN) {
2089 PDEBUG(DEBUG_AP, "SSID: overflow\n");
2090 return;
2091 }
2092
2093 if (local->ap->ap_policy == AP_OTHER_AP_SAME_SSID &&
2094 (ileft != strlen(local->essid) ||
2095 memcmp(local->essid, u, ileft) != 0)) {
2096 /* not our SSID */
2097 return;
2098 }
2099
2100 ssid = u;
2101 ssid_len = ileft;
2102
2103 u += ileft;
2104 left -= ileft;
2105 }
2106
2107 if (*u == WLAN_EID_SUPP_RATES) {
2108 u++; left--;
2109 ileft = *u;
2110 u++; left--;
74fae82c 2111
ff1d2767
JM		 2112 if (ileft > left || ileft == 0 || ileft > 8) {
2113 PDEBUG(DEBUG_AP, " - SUPP_RATES len error\n");
2114 return;
2115 }
2116
2117 supp_rates = u;
2118 supp_rates_len = ileft;
2119
2120 u += ileft;
2121 left -= ileft;
2122 }
2123
2124 if (*u == WLAN_EID_DS_PARAMS) {
2125 u++; left--;
2126 ileft = *u;
2127 u++; left--;
74fae82c 2128
ff1d2767
JM		 2129 if (ileft > left || ileft != 1) {
2130 PDEBUG(DEBUG_AP, " - DS_PARAMS len error\n");
2131 return;
2132 }
2133
2134 channel = *u;
2135
2136 u += ileft;
2137 left -= ileft;
2138 }
2139 }
2140
2141 spin_lock_bh(&local->ap->sta_table_lock);
2142 sta = ap_get_sta(local->ap, hdr->addr2);
2143 if (sta != NULL)
2144 atomic_inc(&sta->users);
2145 spin_unlock_bh(&local->ap->sta_table_lock);
2146
2147 if (sta == NULL) {
2148 /* add new AP */
2149 new_sta = 1;
2150 sta = ap_add_sta(local->ap, hdr->addr2);
2151 if (sta == NULL) {
2152 printk(KERN_INFO "prism2: kmalloc failed for AP "
2153 "data structure\n");
2154 return;
2155 }
2156 hostap_event_new_sta(local->dev, sta);
2157
2158 /* mark APs authentication and associated for pseudo ad-hoc
2159 * style communication */
2160 sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
2161
2162 if (local->ap->autom_ap_wds) {
2163 hostap_wds_link_oper(local, sta->addr, WDS_ADD);
2164 }
2165 }
2166
2167 sta->ap = 1;
2168 if (ssid) {
2169 sta->u.ap.ssid_len = ssid_len;
2170 memcpy(sta->u.ap.ssid, ssid, ssid_len);
2171 sta->u.ap.ssid[ssid_len] = '\0';
2172 } else {
2173 sta->u.ap.ssid_len = 0;
2174 sta->u.ap.ssid[0] = '\0';
2175 }
2176 sta->u.ap.channel = channel;
2177 sta->rx_packets++;
2178 sta->rx_bytes += len;
2179 sta->u.ap.last_beacon = sta->last_rx = jiffies;
2180 sta->capability = capability;
2181 sta->listen_interval = beacon_int;
2182
2183 atomic_dec(&sta->users);
2184
2185 if (new_sta) {
2186 memset(sta->supported_rates, 0, sizeof(sta->supported_rates));
2187 memcpy(sta->supported_rates, supp_rates, supp_rates_len);
2188 prism2_check_tx_rates(sta);
2189 }
2190}
2191
2192#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2193
2194
2195/* Called only as a tasklet. */
2196static void handle_ap_item(local_info_t *local, struct sk_buff *skb,
2197 struct hostap_80211_rx_status *rx_stats)
2198{
2199#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2200 struct net_device *dev = local->dev;
2201#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2202 u16 fc, type, stype;
1ea893fd 2203 struct ieee80211_hdr *hdr;
ff1d2767
JM		 2204
2205 /* FIX: should give skb->len to handler functions and check that the
2206 * buffer is long enough */
1ea893fd
DW		 2207 hdr = (struct ieee80211_hdr *) skb->data;
2208 fc = le16_to_cpu(hdr->frame_control);
2209 type = fc & IEEE80211_FCTL_FTYPE;
2210 stype = fc & IEEE80211_FCTL_STYPE;
ff1d2767
JM		 2211
2212#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
4339d328 2213 if (!local->hostapd && type == IEEE80211_FTYPE_DATA) {
ff1d2767
JM		 2214 PDEBUG(DEBUG_AP, "handle_ap_item - data frame\n");
2215
b2f4a2e3
JM		 2216 if (!(fc & IEEE80211_FCTL_TODS) ||
2217 (fc & IEEE80211_FCTL_FROMDS)) {
4339d328 2218 if (stype == IEEE80211_STYPE_NULLFUNC) {
ff1d2767
JM		 2219 /* no ToDS nullfunc seems to be used to check
2220 * AP association; so send reject message to
2221 * speed up re-association */
2222 ap_handle_dropped_data(local, hdr);
2223 goto done;
2224 }
2225 PDEBUG(DEBUG_AP, " not ToDS frame (fc=0x%04x)\n",
2226 fc);
2227 goto done;
2228 }
2229
d22fbd70 2230 if (!ether_addr_equal(hdr->addr1, dev->dev_addr)) {
e174961c
JB		 2231 PDEBUG(DEBUG_AP, "handle_ap_item - addr1(BSSID)=%pM"
2232 " not own MAC\n", hdr->addr1);
ff1d2767
JM		 2233 goto done;
2234 }
2235
4339d328
JM		 2236 if (local->ap->nullfunc_ack &&
2237 stype == IEEE80211_STYPE_NULLFUNC)
ff1d2767
JM		 2238 ap_handle_data_nullfunc(local, hdr);
2239 else
2240 ap_handle_dropped_data(local, hdr);
2241 goto done;
2242 }
2243
4339d328 2244 if (type == IEEE80211_FTYPE_MGMT && stype == IEEE80211_STYPE_BEACON) {
ff1d2767
JM		 2245 handle_beacon(local, skb, rx_stats);
2246 goto done;
2247 }
2248#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2249
4339d328 2250 if (type == IEEE80211_FTYPE_CTL && stype == IEEE80211_STYPE_PSPOLL) {
ff1d2767
JM		 2251 handle_pspoll(local, hdr, rx_stats);
2252 goto done;
2253 }
2254
2255 if (local->hostapd) {
2256 PDEBUG(DEBUG_AP, "Unknown frame in AP queue: type=0x%02x "
2257 "subtype=0x%02x\n", type, stype);
2258 goto done;
2259 }
2260
2261#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
4339d328 2262 if (type != IEEE80211_FTYPE_MGMT) {
ff1d2767
JM		 2263 PDEBUG(DEBUG_AP, "handle_ap_item - not a management frame?\n");
2264 goto done;
2265 }
2266
d22fbd70 2267 if (!ether_addr_equal(hdr->addr1, dev->dev_addr)) {
e174961c
JB		 2268 PDEBUG(DEBUG_AP, "handle_ap_item - addr1(DA)=%pM"
2269 " not own MAC\n", hdr->addr1);
ff1d2767
JM		 2270 goto done;
2271 }
2272
d22fbd70 2273 if (!ether_addr_equal(hdr->addr3, dev->dev_addr)) {
e174961c
JB		 2274 PDEBUG(DEBUG_AP, "handle_ap_item - addr3(BSSID)=%pM"
2275 " not own MAC\n", hdr->addr3);
ff1d2767
JM		 2276 goto done;
2277 }
2278
2279 switch (stype) {
4339d328 2280 case IEEE80211_STYPE_ASSOC_REQ:
ff1d2767
JM		 2281 handle_assoc(local, skb, rx_stats, 0);
2282 break;
4339d328 2283 case IEEE80211_STYPE_ASSOC_RESP:
ff1d2767
JM		 2284 PDEBUG(DEBUG_AP, "==> ASSOC RESP (ignored)\n");
2285 break;
4339d328 2286 case IEEE80211_STYPE_REASSOC_REQ:
ff1d2767
JM		 2287 handle_assoc(local, skb, rx_stats, 1);
2288 break;
4339d328 2289 case IEEE80211_STYPE_REASSOC_RESP:
ff1d2767
JM		 2290 PDEBUG(DEBUG_AP, "==> REASSOC RESP (ignored)\n");
2291 break;
4339d328 2292 case IEEE80211_STYPE_ATIM:
ff1d2767
JM		 2293 PDEBUG(DEBUG_AP, "==> ATIM (ignored)\n");
2294 break;
4339d328 2295 case IEEE80211_STYPE_DISASSOC:
ff1d2767
JM		 2296 handle_disassoc(local, skb, rx_stats);
2297 break;
4339d328 2298 case IEEE80211_STYPE_AUTH:
ff1d2767
JM		 2299 handle_authen(local, skb, rx_stats);
2300 break;
4339d328 2301 case IEEE80211_STYPE_DEAUTH:
ff1d2767
JM		 2302 handle_deauth(local, skb, rx_stats);
2303 break;
2304 default:
4339d328
JM		 2305 PDEBUG(DEBUG_AP, "Unknown mgmt frame subtype 0x%02x\n",
2306 stype >> 4);
ff1d2767
JM		 2307 break;
2308 }
2309#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2310
2311 done:
2312 dev_kfree_skb(skb);
2313}
2314
2315
2316/* Called only as a tasklet (software IRQ) */
2317void hostap_rx(struct net_device *dev, struct sk_buff *skb,
2318 struct hostap_80211_rx_status *rx_stats)
2319{
2320 struct hostap_interface *iface;
2321 local_info_t *local;
1ea893fd 2322 struct ieee80211_hdr *hdr;
ff1d2767
JM		 2323
2324 iface = netdev_priv(dev);
2325 local = iface->local;
2326
2327 if (skb->len < 16)
2328 goto drop;
2329
4cfa8e45 2330 dev->stats.rx_packets++;
ff1d2767 2331
1ea893fd 2332 hdr = (struct ieee80211_hdr *) skb->data;
ff1d2767
JM		 2333
2334 if (local->ap->ap_policy == AP_OTHER_AP_SKIP_ALL &&
1ea893fd 2335 ieee80211_is_beacon(hdr->frame_control))
ff1d2767
JM		 2336 goto drop;
2337
c1b4aa3f 2338 skb->protocol = cpu_to_be16(ETH_P_HOSTAP);
ff1d2767
JM		 2339 handle_ap_item(local, skb, rx_stats);
2340 return;
2341
2342 drop:
2343 dev_kfree_skb(skb);
2344}
2345
2346
2347/* Called only as a tasklet (software IRQ) */
2348static void schedule_packet_send(local_info_t *local, struct sta_info *sta)
2349{
2350 struct sk_buff *skb;
1ea893fd 2351 struct ieee80211_hdr *hdr;
ff1d2767
JM		 2352 struct hostap_80211_rx_status rx_stats;
2353
2354 if (skb_queue_empty(&sta->tx_buf))
2355 return;
2356
2357 skb = dev_alloc_skb(16);
2358 if (skb == NULL) {
2359 printk(KERN_DEBUG "%s: schedule_packet_send: skb alloc "
2360 "failed\n", local->dev->name);
2361 return;
2362 }
2363
1ea893fd 2364 hdr = (struct ieee80211_hdr *) skb_put(skb, 16);
ff1d2767
JM		 2365
2366 /* Generate a fake pspoll frame to start packet delivery */
1ea893fd 2367 hdr->frame_control = cpu_to_le16(
4339d328 2368 IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL);
ff1d2767
JM		 2369 memcpy(hdr->addr1, local->dev->dev_addr, ETH_ALEN);
2370 memcpy(hdr->addr2, sta->addr, ETH_ALEN);
2371 hdr->duration_id = cpu_to_le16(sta->aid | BIT(15) | BIT(14));
2372
e174961c
JB		 2373 PDEBUG(DEBUG_PS2,
2374 "%s: Scheduling buffered packet delivery for STA %pM\n",
2375 local->dev->name, sta->addr);
ff1d2767
JM		 2376
2377 skb->dev = local->dev;
2378
2379 memset(&rx_stats, 0, sizeof(rx_stats));
2380 hostap_rx(local->dev, skb, &rx_stats);
2381}
2382
2383
5fad5a2e
AB		 2384int prism2_ap_get_sta_qual(local_info_t *local, struct sockaddr addr[],
2385 struct iw_quality qual[], int buf_size,
2386 int aplist)
ff1d2767
JM		 2387{
2388 struct ap_data *ap = local->ap;
2389 struct list_head *ptr;
2390 int count = 0;
2391
2392 spin_lock_bh(&ap->sta_table_lock);
2393
2394 for (ptr = ap->sta_list.next; ptr != NULL && ptr != &ap->sta_list;
2395 ptr = ptr->next) {
2396 struct sta_info *sta = (struct sta_info *) ptr;
2397
2398 if (aplist && !sta->ap)
2399 continue;
2400 addr[count].sa_family = ARPHRD_ETHER;
2401 memcpy(addr[count].sa_data, sta->addr, ETH_ALEN);
2402 if (sta->last_rx_silence == 0)
2403 qual[count].qual = sta->last_rx_signal < 27 ?
2404 0 : (sta->last_rx_signal - 27) * 92 / 127;
2405 else
2406 qual[count].qual = sta->last_rx_signal -
2407 sta->last_rx_silence - 35;
2408 qual[count].level = HFA384X_LEVEL_TO_dBm(sta->last_rx_signal);
2409 qual[count].noise = HFA384X_LEVEL_TO_dBm(sta->last_rx_silence);
2410 qual[count].updated = sta->last_rx_updated;
2411
c28df16e 2412 sta->last_rx_updated = IW_QUAL_DBM;
ff1d2767
JM		 2413
2414 count++;
2415 if (count >= buf_size)
2416 break;
2417 }
2418 spin_unlock_bh(&ap->sta_table_lock);
2419
2420 return count;
2421}
2422
2423
25985edc 2424/* Translate our list of Access Points & Stations to a card independent
ff1d2767 2425 * format that the Wireless Tools will understand - Jean II */
ccc58057
DM		 2426int prism2_ap_translate_scan(struct net_device *dev,
2427 struct iw_request_info *info, char *buffer)
ff1d2767
JM		 2428{
2429 struct hostap_interface *iface;
2430 local_info_t *local;
2431 struct ap_data *ap;
2432 struct list_head *ptr;
2433 struct iw_event iwe;
2434 char *current_ev = buffer;
2435 char *end_buf = buffer + IW_SCAN_MAX_DATA;
2436#if !defined(PRISM2_NO_KERNEL_IEEE80211_MGMT)
2437 char buf[64];
2438#endif
2439
2440 iface = netdev_priv(dev);
2441 local = iface->local;
2442 ap = local->ap;
2443
2444 spin_lock_bh(&ap->sta_table_lock);
2445
2446 for (ptr = ap->sta_list.next; ptr != NULL && ptr != &ap->sta_list;
2447 ptr = ptr->next) {
2448 struct sta_info *sta = (struct sta_info *) ptr;
2449
2450 /* First entry *MUST* be the AP MAC address */
2451 memset(&iwe, 0, sizeof(iwe));
2452 iwe.cmd = SIOCGIWAP;
2453 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
2454 memcpy(iwe.u.ap_addr.sa_data, sta->addr, ETH_ALEN);
2455 iwe.len = IW_EV_ADDR_LEN;
ccc58057
DM		 2456 current_ev = iwe_stream_add_event(info, current_ev, end_buf,
2457 &iwe, IW_EV_ADDR_LEN);
ff1d2767
JM		 2458
2459 /* Use the mode to indicate if it's a station or
2460 * an Access Point */
2461 memset(&iwe, 0, sizeof(iwe));
2462 iwe.cmd = SIOCGIWMODE;
2463 if (sta->ap)
2464 iwe.u.mode = IW_MODE_MASTER;
2465 else
2466 iwe.u.mode = IW_MODE_INFRA;
2467 iwe.len = IW_EV_UINT_LEN;
ccc58057
DM		 2468 current_ev = iwe_stream_add_event(info, current_ev, end_buf,
2469 &iwe, IW_EV_UINT_LEN);
ff1d2767
JM		 2470
2471 /* Some quality */
2472 memset(&iwe, 0, sizeof(iwe));
2473 iwe.cmd = IWEVQUAL;
2474 if (sta->last_rx_silence == 0)
2475 iwe.u.qual.qual = sta->last_rx_signal < 27 ?
2476 0 : (sta->last_rx_signal - 27) * 92 / 127;
2477 else
2478 iwe.u.qual.qual = sta->last_rx_signal -
2479 sta->last_rx_silence - 35;
2480 iwe.u.qual.level = HFA384X_LEVEL_TO_dBm(sta->last_rx_signal);
2481 iwe.u.qual.noise = HFA384X_LEVEL_TO_dBm(sta->last_rx_silence);
2482 iwe.u.qual.updated = sta->last_rx_updated;
2483 iwe.len = IW_EV_QUAL_LEN;
ccc58057
DM		 2484 current_ev = iwe_stream_add_event(info, current_ev, end_buf,
2485 &iwe, IW_EV_QUAL_LEN);
ff1d2767
JM		 2486
2487#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2488 if (sta->ap) {
2489 memset(&iwe, 0, sizeof(iwe));
2490 iwe.cmd = SIOCGIWESSID;
2491 iwe.u.data.length = sta->u.ap.ssid_len;
2492 iwe.u.data.flags = 1;
ccc58057
DM		 2493 current_ev = iwe_stream_add_point(info, current_ev,
2494 end_buf, &iwe,
ff1d2767
JM		 2495 sta->u.ap.ssid);
2496
2497 memset(&iwe, 0, sizeof(iwe));
2498 iwe.cmd = SIOCGIWENCODE;
2499 if (sta->capability & WLAN_CAPABILITY_PRIVACY)
2500 iwe.u.data.flags =
2501 IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
2502 else
2503 iwe.u.data.flags = IW_ENCODE_DISABLED;
ccc58057
DM		 2504 current_ev = iwe_stream_add_point(info, current_ev,
2505 end_buf, &iwe,
2506 sta->u.ap.ssid);
ff1d2767
JM		 2507
2508 if (sta->u.ap.channel > 0 &&
2509 sta->u.ap.channel <= FREQ_COUNT) {
2510 memset(&iwe, 0, sizeof(iwe));
2511 iwe.cmd = SIOCGIWFREQ;
2512 iwe.u.freq.m = freq_list[sta->u.ap.channel - 1]
2513 * 100000;
2514 iwe.u.freq.e = 1;
2515 current_ev = iwe_stream_add_event(
ccc58057 2516 info, current_ev, end_buf, &iwe,
ff1d2767
JM		 2517 IW_EV_FREQ_LEN);
2518 }
2519
2520 memset(&iwe, 0, sizeof(iwe));
2521 iwe.cmd = IWEVCUSTOM;
2522 sprintf(buf, "beacon_interval=%d",
2523 sta->listen_interval);
2524 iwe.u.data.length = strlen(buf);
ccc58057
DM		 2525 current_ev = iwe_stream_add_point(info, current_ev,
2526 end_buf, &iwe, buf);
ff1d2767
JM		 2527 }
2528#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2529
c28df16e 2530 sta->last_rx_updated = IW_QUAL_DBM;
ff1d2767
JM		 2531
2532 /* To be continued, we should make good use of IWEVCUSTOM */
2533 }
2534
2535 spin_unlock_bh(&ap->sta_table_lock);
2536
2537 return current_ev - buffer;
2538}
2539
2540
2541static int prism2_hostapd_add_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 == NULL) {
2553 sta = ap_add_sta(ap, param->sta_addr);
2554 if (sta == NULL)
2555 return -1;
2556 }
2557
2558 if (!(sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
2559 hostap_event_new_sta(sta->local->dev, sta);
2560
2561 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC;
2562 sta->last_rx = jiffies;
2563 sta->aid = param->u.add_sta.aid;
2564 sta->capability = param->u.add_sta.capability;
2565 sta->tx_supp_rates = param->u.add_sta.tx_supp_rates;
2566 if (sta->tx_supp_rates & WLAN_RATE_1M)
2567 sta->supported_rates[0] = 2;
2568 if (sta->tx_supp_rates & WLAN_RATE_2M)
2569 sta->supported_rates[1] = 4;
2570 if (sta->tx_supp_rates & WLAN_RATE_5M5)
2571 sta->supported_rates[2] = 11;
2572 if (sta->tx_supp_rates & WLAN_RATE_11M)
2573 sta->supported_rates[3] = 22;
2574 prism2_check_tx_rates(sta);
2575 atomic_dec(&sta->users);
2576 return 0;
2577}
2578
2579
2580static int prism2_hostapd_remove_sta(struct ap_data *ap,
2581 struct prism2_hostapd_param *param)
2582{
2583 struct sta_info *sta;
2584
2585 spin_lock_bh(&ap->sta_table_lock);
2586 sta = ap_get_sta(ap, param->sta_addr);
2587 if (sta) {
2588 ap_sta_hash_del(ap, sta);
2589 list_del(&sta->list);
2590 }
2591 spin_unlock_bh(&ap->sta_table_lock);
2592
2593 if (!sta)
2594 return -ENOENT;
2595
2596 if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
2597 hostap_event_expired_sta(sta->local->dev, sta);
2598 ap_free_sta(ap, sta);
2599
2600 return 0;
2601}
2602
2603
2604static int prism2_hostapd_get_info_sta(struct ap_data *ap,
2605 struct prism2_hostapd_param *param)
2606{
2607 struct sta_info *sta;
2608
2609 spin_lock_bh(&ap->sta_table_lock);
2610 sta = ap_get_sta(ap, param->sta_addr);
2611 if (sta)
2612 atomic_inc(&sta->users);
2613 spin_unlock_bh(&ap->sta_table_lock);
2614
2615 if (!sta)
2616 return -ENOENT;
2617
2618 param->u.get_info_sta.inactive_sec = (jiffies - sta->last_rx) / HZ;
2619
2620 atomic_dec(&sta->users);
2621
2622 return 1;
2623}
2624
2625
2626static int prism2_hostapd_set_flags_sta(struct ap_data *ap,
2627 struct prism2_hostapd_param *param)
2628{
2629 struct sta_info *sta;
2630
2631 spin_lock_bh(&ap->sta_table_lock);
2632 sta = ap_get_sta(ap, param->sta_addr);
2633 if (sta) {
2634 sta->flags |= param->u.set_flags_sta.flags_or;
2635 sta->flags &= param->u.set_flags_sta.flags_and;
2636 }
2637 spin_unlock_bh(&ap->sta_table_lock);
2638
2639 if (!sta)
2640 return -ENOENT;
2641
2642 return 0;
2643}
2644
2645
2646static int prism2_hostapd_sta_clear_stats(struct ap_data *ap,
2647 struct prism2_hostapd_param *param)
2648{
2649 struct sta_info *sta;
2650 int rate;
2651
2652 spin_lock_bh(&ap->sta_table_lock);
2653 sta = ap_get_sta(ap, param->sta_addr);
2654 if (sta) {
2655 sta->rx_packets = sta->tx_packets = 0;
2656 sta->rx_bytes = sta->tx_bytes = 0;
2657 for (rate = 0; rate < WLAN_RATE_COUNT; rate++) {
2658 sta->tx_count[rate] = 0;
2659 sta->rx_count[rate] = 0;
2660 }
2661 }
2662 spin_unlock_bh(&ap->sta_table_lock);
2663
2664 if (!sta)
2665 return -ENOENT;
2666
2667 return 0;
2668}
2669
2670
5fad5a2e 2671int prism2_hostapd(struct ap_data *ap, struct prism2_hostapd_param *param)
ff1d2767
JM		 2672{
2673 switch (param->cmd) {
2674 case PRISM2_HOSTAPD_FLUSH:
2675 ap_control_kickall(ap);
2676 return 0;
2677 case PRISM2_HOSTAPD_ADD_STA:
2678 return prism2_hostapd_add_sta(ap, param);
2679 case PRISM2_HOSTAPD_REMOVE_STA:
2680 return prism2_hostapd_remove_sta(ap, param);
2681 case PRISM2_HOSTAPD_GET_INFO_STA:
2682 return prism2_hostapd_get_info_sta(ap, param);
2683 case PRISM2_HOSTAPD_SET_FLAGS_STA:
2684 return prism2_hostapd_set_flags_sta(ap, param);
2685 case PRISM2_HOSTAPD_STA_CLEAR_STATS:
2686 return prism2_hostapd_sta_clear_stats(ap, param);
2687 default:
2688 printk(KERN_WARNING "prism2_hostapd: unknown cmd=%d\n",
2689 param->cmd);
2690 return -EOPNOTSUPP;
2691 }
2692}
2693
2694
2695/* Update station info for host-based TX rate control and return current
2696 * TX rate */
2697static int ap_update_sta_tx_rate(struct sta_info *sta, struct net_device *dev)
2698{
2699 int ret = sta->tx_rate;
2700 struct hostap_interface *iface;
2701 local_info_t *local;
2702
2703 iface = netdev_priv(dev);
2704 local = iface->local;
2705
2706 sta->tx_count[sta->tx_rate_idx]++;
2707 sta->tx_since_last_failure++;
2708 sta->tx_consecutive_exc = 0;
2709 if (sta->tx_since_last_failure >= WLAN_RATE_UPDATE_COUNT &&
2710 sta->tx_rate_idx < sta->tx_max_rate) {
2711 /* use next higher rate */
2712 int old_rate, new_rate;
2713 old_rate = new_rate = sta->tx_rate_idx;
2714 while (new_rate < sta->tx_max_rate) {
2715 new_rate++;
2716 if (ap_tx_rate_ok(new_rate, sta, local)) {
2717 sta->tx_rate_idx = new_rate;
2718 break;
2719 }
2720 }
2721 if (old_rate != sta->tx_rate_idx) {
2722 switch (sta->tx_rate_idx) {
2723 case 0: sta->tx_rate = 10; break;
2724 case 1: sta->tx_rate = 20; break;
2725 case 2: sta->tx_rate = 55; break;
2726 case 3: sta->tx_rate = 110; break;
2727 default: sta->tx_rate = 0; break;
2728 }
e174961c
JB		 2729 PDEBUG(DEBUG_AP, "%s: STA %pM TX rate raised to %d\n",
2730 dev->name, sta->addr, sta->tx_rate);
ff1d2767
JM		 2731 }
2732 sta->tx_since_last_failure = 0;
2733 }
2734
2735 return ret;
2736}
2737
2738
2739/* Called only from software IRQ. Called for each TX frame prior possible
2740 * encryption and transmit. */
2741ap_tx_ret hostap_handle_sta_tx(local_info_t *local, struct hostap_tx_data *tx)
2742{
2743 struct sta_info *sta = NULL;
2744 struct sk_buff *skb = tx->skb;
2745 int set_tim, ret;
1ea893fd 2746 struct ieee80211_hdr *hdr;
ff1d2767
JM		 2747 struct hostap_skb_tx_data *meta;
2748
2749 meta = (struct hostap_skb_tx_data *) skb->cb;
2750 ret = AP_TX_CONTINUE;
2751 if (local->ap == NULL || skb->len < 10 ||
2752 meta->iface->type == HOSTAP_INTERFACE_STA)
2753 goto out;
2754
1ea893fd 2755 hdr = (struct ieee80211_hdr *) skb->data;
ff1d2767
JM		 2756
2757 if (hdr->addr1[0] & 0x01) {
2758 /* broadcast/multicast frame - no AP related processing */
b9180990
PR		 2759 if (local->ap->num_sta <= 0)
2760 ret = AP_TX_DROP;
ff1d2767
JM		 2761 goto out;
2762 }
2763
2764 /* unicast packet - check whether destination STA is associated */
2765 spin_lock(&local->ap->sta_table_lock);
2766 sta = ap_get_sta(local->ap, hdr->addr1);
2767 if (sta)
2768 atomic_inc(&sta->users);
2769 spin_unlock(&local->ap->sta_table_lock);
2770
5bee720f
JM		 2771 if (local->iw_mode == IW_MODE_MASTER && sta == NULL &&
2772 !(meta->flags & HOSTAP_TX_FLAGS_WDS) &&
ff1d2767
JM		 2773 meta->iface->type != HOSTAP_INTERFACE_MASTER &&
2774 meta->iface->type != HOSTAP_INTERFACE_AP) {
2775#if 0
2776 /* This can happen, e.g., when wlan0 is added to a bridge and
2777 * bridging code does not know which port is the correct target
2778 * for a unicast frame. In this case, the packet is send to all
2779 * ports of the bridge. Since this is a valid scenario, do not
2780 * print out any errors here. */
2781 if (net_ratelimit()) {
2782 printk(KERN_DEBUG "AP: drop packet to non-associated "
e174961c 2783 "STA %pM\n", hdr->addr1);
ff1d2767
JM		 2784 }
2785#endif
2786 local->ap->tx_drop_nonassoc++;
2787 ret = AP_TX_DROP;
2788 goto out;
2789 }
2790
2791 if (sta == NULL)
2792 goto out;
2793
2794 if (!(sta->flags & WLAN_STA_AUTHORIZED))
2795 ret = AP_TX_CONTINUE_NOT_AUTHORIZED;
2796
2797 /* Set tx_rate if using host-based TX rate control */
2798 if (!local->fw_tx_rate_control)
2799 local->ap->last_tx_rate = meta->rate =
2800 ap_update_sta_tx_rate(sta, local->dev);
2801
2802 if (local->iw_mode != IW_MODE_MASTER)
2803 goto out;
2804
2805 if (!(sta->flags & WLAN_STA_PS))
2806 goto out;
2807
5bee720f
JM		 2808 if (meta->flags & HOSTAP_TX_FLAGS_ADD_MOREDATA) {
2809 /* indicate to STA that more frames follow */
1ea893fd 2810 hdr->frame_control |=
c1b4aa3f 2811 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
5bee720f 2812 }
ff1d2767 2813
5bee720f
JM		 2814 if (meta->flags & HOSTAP_TX_FLAGS_BUFFERED_FRAME) {
2815 /* packet was already buffered and now send due to
2816 * PS poll, so do not rebuffer it */
2817 goto out;
ff1d2767
JM		 2818 }
2819
2820 if (skb_queue_len(&sta->tx_buf) >= STA_MAX_TX_BUFFER) {
e174961c
JB		 2821 PDEBUG(DEBUG_PS, "%s: No more space in STA (%pM)'s"
2822 "PS mode buffer\n",
2823 local->dev->name, sta->addr);
ff1d2767
JM		 2824 /* Make sure that TIM is set for the station (it might not be
2825 * after AP wlan hw reset). */
2826 /* FIX: should fix hw reset to restore bits based on STA
2827 * buffer state.. */
2828 hostap_set_tim(local, sta->aid, 1);
2829 sta->flags |= WLAN_STA_TIM;
2830 ret = AP_TX_DROP;
2831 goto out;
2832 }
2833
2834 /* STA in PS mode, buffer frame for later delivery */
2835 set_tim = skb_queue_empty(&sta->tx_buf);
2836 skb_queue_tail(&sta->tx_buf, skb);
2837 /* FIX: could save RX time to skb and expire buffered frames after
2838 * some time if STA does not poll for them */
2839
2840 if (set_tim) {
2841 if (sta->flags & WLAN_STA_TIM)
2842 PDEBUG(DEBUG_PS2, "Re-setting TIM for aid %d\n",
2843 sta->aid);
2844 hostap_set_tim(local, sta->aid, 1);
2845 sta->flags |= WLAN_STA_TIM;
2846 }
2847
2848 ret = AP_TX_BUFFERED;
2849
2850 out:
2851 if (sta != NULL) {
2852 if (ret == AP_TX_CONTINUE ||
2853 ret == AP_TX_CONTINUE_NOT_AUTHORIZED) {
2854 sta->tx_packets++;
2855 sta->tx_bytes += skb->len;
2856 sta->last_tx = jiffies;
2857 }
2858
2859 if ((ret == AP_TX_CONTINUE ||
2860 ret == AP_TX_CONTINUE_NOT_AUTHORIZED) &&
2861 sta->crypt && tx->host_encrypt) {
2862 tx->crypt = sta->crypt;
2863 tx->sta_ptr = sta; /* hostap_handle_sta_release() will
2864 * be called to release sta info
2865 * later */
2866 } else
2867 atomic_dec(&sta->users);
2868 }
2869
2870 return ret;
2871}
2872
2873
2874void hostap_handle_sta_release(void *ptr)
2875{
2876 struct sta_info *sta = ptr;
2877 atomic_dec(&sta->users);
2878}
2879
2880
2881/* Called only as a tasklet (software IRQ) */
2882void hostap_handle_sta_tx_exc(local_info_t *local, struct sk_buff *skb)
2883{
2884 struct sta_info *sta;
1ea893fd 2885 struct ieee80211_hdr *hdr;
ff1d2767
JM		 2886 struct hostap_skb_tx_data *meta;
2887
1ea893fd 2888 hdr = (struct ieee80211_hdr *) skb->data;
ff1d2767
JM		 2889 meta = (struct hostap_skb_tx_data *) skb->cb;
2890
2891 spin_lock(&local->ap->sta_table_lock);
2892 sta = ap_get_sta(local->ap, hdr->addr1);
2893 if (!sta) {
2894 spin_unlock(&local->ap->sta_table_lock);
e174961c 2895 PDEBUG(DEBUG_AP, "%s: Could not find STA %pM"
0795af57 2896 " for this TX error (@%lu)\n",
e174961c 2897 local->dev->name, hdr->addr1, jiffies);
ff1d2767
JM		 2898 return;
2899 }
2900
2901 sta->tx_since_last_failure = 0;
2902 sta->tx_consecutive_exc++;
74fae82c 2903
ff1d2767
JM		 2904 if (sta->tx_consecutive_exc >= WLAN_RATE_DECREASE_THRESHOLD &&
2905 sta->tx_rate_idx > 0 && meta->rate <= sta->tx_rate) {
2906 /* use next lower rate */
2907 int old, rate;
2908 old = rate = sta->tx_rate_idx;
2909 while (rate > 0) {
2910 rate--;
2911 if (ap_tx_rate_ok(rate, sta, local)) {
2912 sta->tx_rate_idx = rate;
2913 break;
2914 }
2915 }
2916 if (old != sta->tx_rate_idx) {
2917 switch (sta->tx_rate_idx) {
2918 case 0: sta->tx_rate = 10; break;
2919 case 1: sta->tx_rate = 20; break;
2920 case 2: sta->tx_rate = 55; break;
2921 case 3: sta->tx_rate = 110; break;
2922 default: sta->tx_rate = 0; break;
2923 }
e174961c
JB		 2924 PDEBUG(DEBUG_AP,
2925 "%s: STA %pM TX rate lowered to %d\n",
2926 local->dev->name, sta->addr, sta->tx_rate);
ff1d2767
JM		 2927 }
2928 sta->tx_consecutive_exc = 0;
2929 }
2930 spin_unlock(&local->ap->sta_table_lock);
2931}
2932
2933
2934static void hostap_update_sta_ps2(local_info_t *local, struct sta_info *sta,
2935 int pwrmgt, int type, int stype)
2936{
2937 if (pwrmgt && !(sta->flags & WLAN_STA_PS)) {
2938 sta->flags |= WLAN_STA_PS;
e174961c 2939 PDEBUG(DEBUG_PS2, "STA %pM changed to use PS "
ff1d2767 2940 "mode (type=0x%02X, stype=0x%02X)\n",
e174961c 2941 sta->addr, type >> 2, stype >> 4);
ff1d2767
JM		 2942 } else if (!pwrmgt && (sta->flags & WLAN_STA_PS)) {
2943 sta->flags &= ~WLAN_STA_PS;
e174961c 2944 PDEBUG(DEBUG_PS2, "STA %pM changed to not use "
ff1d2767 2945 "PS mode (type=0x%02X, stype=0x%02X)\n",
e174961c 2946 sta->addr, type >> 2, stype >> 4);
4339d328
JM		 2947 if (type != IEEE80211_FTYPE_CTL ||
2948 stype != IEEE80211_STYPE_PSPOLL)
ff1d2767
JM		 2949 schedule_packet_send(local, sta);
2950 }
2951}
2952
2953
2954/* Called only as a tasklet (software IRQ). Called for each RX frame to update
1ea893fd
DW		 2955 * STA power saving state. pwrmgt is a flag from 802.11 frame_control field. */
2956int hostap_update_sta_ps(local_info_t *local, struct ieee80211_hdr *hdr)
ff1d2767
JM		 2957{
2958 struct sta_info *sta;
2959 u16 fc;
2960
2961 spin_lock(&local->ap->sta_table_lock);
2962 sta = ap_get_sta(local->ap, hdr->addr2);
2963 if (sta)
2964 atomic_inc(&sta->users);
2965 spin_unlock(&local->ap->sta_table_lock);
2966
2967 if (!sta)
2968 return -1;
2969
1ea893fd 2970 fc = le16_to_cpu(hdr->frame_control);
b2f4a2e3 2971 hostap_update_sta_ps2(local, sta, fc & IEEE80211_FCTL_PM,
1ea893fd
DW		 2972 fc & IEEE80211_FCTL_FTYPE,
2973 fc & IEEE80211_FCTL_STYPE);
ff1d2767
JM		 2974
2975 atomic_dec(&sta->users);
2976 return 0;
2977}
2978
2979
2980/* Called only as a tasklet (software IRQ). Called for each RX frame after
2981 * getting RX header and payload from hardware. */
2982ap_rx_ret hostap_handle_sta_rx(local_info_t *local, struct net_device *dev,
2983 struct sk_buff *skb,
2984 struct hostap_80211_rx_status *rx_stats,
2985 int wds)
2986{
2987 int ret;
2988 struct sta_info *sta;
2989 u16 fc, type, stype;
1ea893fd 2990 struct ieee80211_hdr *hdr;
ff1d2767
JM		 2991
2992 if (local->ap == NULL)
2993 return AP_RX_CONTINUE;
2994
1ea893fd 2995 hdr = (struct ieee80211_hdr *) skb->data;
ff1d2767 2996
1ea893fd
DW		 2997 fc = le16_to_cpu(hdr->frame_control);
2998 type = fc & IEEE80211_FCTL_FTYPE;
2999 stype = fc & IEEE80211_FCTL_STYPE;
ff1d2767
JM		 3000
3001 spin_lock(&local->ap->sta_table_lock);
3002 sta = ap_get_sta(local->ap, hdr->addr2);
3003 if (sta)
3004 atomic_inc(&sta->users);
3005 spin_unlock(&local->ap->sta_table_lock);
3006
3007 if (sta && !(sta->flags & WLAN_STA_AUTHORIZED))
3008 ret = AP_RX_CONTINUE_NOT_AUTHORIZED;
3009 else
3010 ret = AP_RX_CONTINUE;
3011
3012
b2f4a2e3 3013 if (fc & IEEE80211_FCTL_TODS) {
ff1d2767
JM		 3014 if (!wds && (sta == NULL || !(sta->flags & WLAN_STA_ASSOC))) {
3015 if (local->hostapd) {
3016 prism2_rx_80211(local->apdev, skb, rx_stats,
3017 PRISM2_RX_NON_ASSOC);
3018#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
3019 } else {
3020 printk(KERN_DEBUG "%s: dropped received packet"
e174961c 3021 " from non-associated STA %pM"
ff1d2767 3022 " (type=0x%02x, subtype=0x%02x)\n",
e174961c 3023 dev->name, hdr->addr2,
4339d328 3024 type >> 2, stype >> 4);
ff1d2767
JM		 3025 hostap_rx(dev, skb, rx_stats);
3026#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
3027 }
3028 ret = AP_RX_EXIT;
3029 goto out;
3030 }
b2f4a2e3 3031 } else if (fc & IEEE80211_FCTL_FROMDS) {
ff1d2767
JM		 3032 if (!wds) {
3033 /* FromDS frame - not for us; probably
3034 * broadcast/multicast in another BSS - drop */
d22fbd70 3035 if (ether_addr_equal(hdr->addr1, dev->dev_addr)) {
ff1d2767
JM		 3036 printk(KERN_DEBUG "Odd.. FromDS packet "
3037 "received with own BSSID\n");
3038 hostap_dump_rx_80211(dev->name, skb, rx_stats);
3039 }
3040 ret = AP_RX_DROP;
3041 goto out;
3042 }
4339d328 3043 } else if (stype == IEEE80211_STYPE_NULLFUNC && sta == NULL &&
d22fbd70 3044 ether_addr_equal(hdr->addr1, dev->dev_addr)) {
ff1d2767
JM		 3045
3046 if (local->hostapd) {
3047 prism2_rx_80211(local->apdev, skb, rx_stats,
3048 PRISM2_RX_NON_ASSOC);
3049#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
3050 } else {
3051 /* At least Lucent f/w seems to send data::nullfunc
3052 * frames with no ToDS flag when the current AP returns
3053 * after being unavailable for some time. Speed up
3054 * re-association by informing the station about it not
3055 * being associated. */
e174961c
JB		 3056 printk(KERN_DEBUG "%s: rejected received nullfunc frame"
3057 " without ToDS from not associated STA %pM\n",
3058 dev->name, hdr->addr2);
ff1d2767
JM		 3059 hostap_rx(dev, skb, rx_stats);
3060#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
3061 }
3062 ret = AP_RX_EXIT;
3063 goto out;
4339d328 3064 } else if (stype == IEEE80211_STYPE_NULLFUNC) {
ff1d2767
JM		 3065 /* At least Lucent cards seem to send periodic nullfunc
3066 * frames with ToDS. Let these through to update SQ
3067 * stats and PS state. Nullfunc frames do not contain
3068 * any data and they will be dropped below. */
3069 } else {
3070 /* If BSSID (Addr3) is foreign, this frame is a normal
3071 * broadcast frame from an IBSS network. Drop it silently.
3072 * If BSSID is own, report the dropping of this frame. */
d22fbd70 3073 if (ether_addr_equal(hdr->addr3, dev->dev_addr)) {
e174961c
JB		 3074 printk(KERN_DEBUG "%s: dropped received packet from %pM"
3075 " with no ToDS flag "
0795af57 3076 "(type=0x%02x, subtype=0x%02x)\n", dev->name,
e174961c 3077 hdr->addr2, type >> 2, stype >> 4);
ff1d2767
JM		 3078 hostap_dump_rx_80211(dev->name, skb, rx_stats);
3079 }
3080 ret = AP_RX_DROP;
3081 goto out;
3082 }
3083
3084 if (sta) {
b2f4a2e3 3085 hostap_update_sta_ps2(local, sta, fc & IEEE80211_FCTL_PM,
ff1d2767
JM		 3086 type, stype);
3087
3088 sta->rx_packets++;
3089 sta->rx_bytes += skb->len;
3090 sta->last_rx = jiffies;
3091 }
3092
4339d328 3093 if (local->ap->nullfunc_ack && stype == IEEE80211_STYPE_NULLFUNC &&
b2f4a2e3 3094 fc & IEEE80211_FCTL_TODS) {
ff1d2767
JM		 3095 if (local->hostapd) {
3096 prism2_rx_80211(local->apdev, skb, rx_stats,
3097 PRISM2_RX_NULLFUNC_ACK);
3098#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
3099 } else {
3100 /* some STA f/w's seem to require control::ACK frame
3101 * for data::nullfunc, but Prism2 f/w 0.8.0 (at least
3102 * from Compaq) does not send this.. Try to generate
3103 * ACK for these frames from the host driver to make
3104 * power saving work with, e.g., Lucent WaveLAN f/w */
3105 hostap_rx(dev, skb, rx_stats);
3106#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
3107 }
3108 ret = AP_RX_EXIT;
3109 goto out;
3110 }
3111
3112 out:
3113 if (sta)
3114 atomic_dec(&sta->users);
3115
3116 return ret;
3117}
3118
3119
3120/* Called only as a tasklet (software IRQ) */
3121int hostap_handle_sta_crypto(local_info_t *local,
1ea893fd 3122 struct ieee80211_hdr *hdr,
274bfb8d 3123 struct lib80211_crypt_data **crypt,
62fe7e37 3124 void **sta_ptr)
ff1d2767
JM		 3125{
3126 struct sta_info *sta;
3127
3128 spin_lock(&local->ap->sta_table_lock);
3129 sta = ap_get_sta(local->ap, hdr->addr2);
3130 if (sta)
3131 atomic_inc(&sta->users);
3132 spin_unlock(&local->ap->sta_table_lock);
3133
3134 if (!sta)
3135 return -1;
3136
3137 if (sta->crypt) {
3138 *crypt = sta->crypt;
3139 *sta_ptr = sta;
3140 /* hostap_handle_sta_release() will be called to release STA
3141 * info */
3142 } else
3143 atomic_dec(&sta->users);
3144
3145 return 0;
3146}
3147
3148
3149/* Called only as a tasklet (software IRQ) */
3150int hostap_is_sta_assoc(struct ap_data *ap, u8 *sta_addr)
3151{
3152 struct sta_info *sta;
3153 int ret = 0;
3154
3155 spin_lock(&ap->sta_table_lock);
3156 sta = ap_get_sta(ap, sta_addr);
3157 if (sta != NULL && (sta->flags & WLAN_STA_ASSOC) && !sta->ap)
3158 ret = 1;
3159 spin_unlock(&ap->sta_table_lock);
3160
3161 return ret;
3162}
3163
3164
3165/* Called only as a tasklet (software IRQ) */
3166int hostap_is_sta_authorized(struct ap_data *ap, u8 *sta_addr)
3167{
3168 struct sta_info *sta;
3169 int ret = 0;
3170
3171 spin_lock(&ap->sta_table_lock);
3172 sta = ap_get_sta(ap, sta_addr);
3173 if (sta != NULL && (sta->flags & WLAN_STA_ASSOC) && !sta->ap &&
3174 ((sta->flags & WLAN_STA_AUTHORIZED) ||
3175 ap->local->ieee_802_1x == 0))
3176 ret = 1;
3177 spin_unlock(&ap->sta_table_lock);
3178
3179 return ret;
3180}
3181
3182
3183/* Called only as a tasklet (software IRQ) */
3184int hostap_add_sta(struct ap_data *ap, u8 *sta_addr)
3185{
3186 struct sta_info *sta;
3187 int ret = 1;
3188
3189 if (!ap)
3190 return -1;
3191
3192 spin_lock(&ap->sta_table_lock);
3193 sta = ap_get_sta(ap, sta_addr);
3194 if (sta)
3195 ret = 0;
3196 spin_unlock(&ap->sta_table_lock);
3197
3198 if (ret == 1) {
3199 sta = ap_add_sta(ap, sta_addr);
3200 if (!sta)
54b85f48 3201 return -1;
ff1d2767
JM		 3202 sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
3203 sta->ap = 1;
3204 memset(sta->supported_rates, 0, sizeof(sta->supported_rates));
3205 /* No way of knowing which rates are supported since we did not
3206 * get supported rates element from beacon/assoc req. Assume
3207 * that remote end supports all 802.11b rates. */
3208 sta->supported_rates[0] = 0x82;
3209 sta->supported_rates[1] = 0x84;
3210 sta->supported_rates[2] = 0x0b;
3211 sta->supported_rates[3] = 0x16;
3212 sta->tx_supp_rates = WLAN_RATE_1M | WLAN_RATE_2M |
3213 WLAN_RATE_5M5 | WLAN_RATE_11M;
3214 sta->tx_rate = 110;
3215 sta->tx_max_rate = sta->tx_rate_idx = 3;
3216 }
3217
3218 return ret;
3219}
3220
3221
3222/* Called only as a tasklet (software IRQ) */
3223int hostap_update_rx_stats(struct ap_data *ap,
1ea893fd 3224 struct ieee80211_hdr *hdr,
ff1d2767
JM		 3225 struct hostap_80211_rx_status *rx_stats)
3226{
3227 struct sta_info *sta;
3228
3229 if (!ap)
3230 return -1;
3231
3232 spin_lock(&ap->sta_table_lock);
3233 sta = ap_get_sta(ap, hdr->addr2);
3234 if (sta) {
3235 sta->last_rx_silence = rx_stats->noise;
3236 sta->last_rx_signal = rx_stats->signal;
3237 sta->last_rx_rate = rx_stats->rate;
c28df16e 3238 sta->last_rx_updated = IW_QUAL_ALL_UPDATED | IW_QUAL_DBM;
ff1d2767
JM		 3239 if (rx_stats->rate == 10)
3240 sta->rx_count[0]++;
3241 else if (rx_stats->rate == 20)
3242 sta->rx_count[1]++;
3243 else if (rx_stats->rate == 55)
3244 sta->rx_count[2]++;
3245 else if (rx_stats->rate == 110)
3246 sta->rx_count[3]++;
3247 }
3248 spin_unlock(&ap->sta_table_lock);
3249
3250 return sta ? 0 : -1;
3251}
3252
3253
3254void hostap_update_rates(local_info_t *local)
3255{
c1505731 3256 struct sta_info *sta;
ff1d2767
JM		 3257 struct ap_data *ap = local->ap;
3258
3259 if (!ap)
3260 return;
3261
3262 spin_lock_bh(&ap->sta_table_lock);
c1505731 3263 list_for_each_entry(sta, &ap->sta_list, list) {
ff1d2767
JM		 3264 prism2_check_tx_rates(sta);
3265 }
3266 spin_unlock_bh(&ap->sta_table_lock);
3267}
3268
3269
5fad5a2e 3270void * ap_crypt_get_ptrs(struct ap_data *ap, u8 *addr, int permanent,
274bfb8d 3271 struct lib80211_crypt_data ***crypt)
ff1d2767
JM		 3272{
3273 struct sta_info *sta;
3274
3275 spin_lock_bh(&ap->sta_table_lock);
3276 sta = ap_get_sta(ap, addr);
3277 if (sta)
3278 atomic_inc(&sta->users);
3279 spin_unlock_bh(&ap->sta_table_lock);
3280
3281 if (!sta && permanent)
3282 sta = ap_add_sta(ap, addr);
3283
3284 if (!sta)
3285 return NULL;
3286
3287 if (permanent)
3288 sta->flags |= WLAN_STA_PERM;
3289
3290 *crypt = &sta->crypt;
3291
3292 return sta;
3293}
3294
3295
3296void hostap_add_wds_links(local_info_t *local)
3297{
3298 struct ap_data *ap = local->ap;
c1505731 3299 struct sta_info *sta;
ff1d2767
JM		 3300
3301 spin_lock_bh(&ap->sta_table_lock);
c1505731 3302 list_for_each_entry(sta, &ap->sta_list, list) {
ff1d2767
JM		 3303 if (sta->ap)
3304 hostap_wds_link_oper(local, sta->addr, WDS_ADD);
3305 }
3306 spin_unlock_bh(&ap->sta_table_lock);
3307
3308 schedule_work(&local->ap->wds_oper_queue);
3309}
3310
3311
3312void hostap_wds_link_oper(local_info_t *local, u8 *addr, wds_oper_type type)
3313{
3314 struct wds_oper_data *entry;
3315
3316 entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
3317 if (!entry)
3318 return;
3319 memcpy(entry->addr, addr, ETH_ALEN);
3320 entry->type = type;
3321 spin_lock_bh(&local->lock);
3322 entry->next = local->ap->wds_oper_entries;
3323 local->ap->wds_oper_entries = entry;
3324 spin_unlock_bh(&local->lock);
3325
3326 schedule_work(&local->ap->wds_oper_queue);
3327}
3328
3329
3330EXPORT_SYMBOL(hostap_init_data);
3331EXPORT_SYMBOL(hostap_init_ap_proc);
3332EXPORT_SYMBOL(hostap_free_data);
3333EXPORT_SYMBOL(hostap_check_sta_fw_version);
ff1d2767 3334EXPORT_SYMBOL(hostap_handle_sta_tx_exc);
ff1d2767 3335#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
ff1d2767 3336#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
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