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[mirror_ubuntu-jammy-kernel.git] / drivers / net / wireless / hostap / hostap_main.c
1 /*
2 * Host AP (software wireless LAN access point) driver for
3 * Intersil Prism2/2.5/3 - hostap.o module, common routines
4 *
5 * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
6 * <j@w1.fi>
7 * Copyright (c) 2002-2005, Jouni Malinen <j@w1.fi>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation. See README and COPYING for
12 * more details.
13 */
14
15 #include <linux/module.h>
16 #include <linux/init.h>
17 #include <linux/slab.h>
18 #include <linux/proc_fs.h>
19 #include <linux/if_arp.h>
20 #include <linux/delay.h>
21 #include <linux/random.h>
22 #include <linux/workqueue.h>
23 #include <linux/kmod.h>
24 #include <linux/rtnetlink.h>
25 #include <linux/wireless.h>
26 #include <linux/etherdevice.h>
27 #include <net/net_namespace.h>
28 #include <net/iw_handler.h>
29 #include <net/lib80211.h>
30 #include <asm/uaccess.h>
31
32 #include "hostap_wlan.h"
33 #include "hostap_80211.h"
34 #include "hostap_ap.h"
35 #include "hostap.h"
36
37 MODULE_AUTHOR("Jouni Malinen");
38 MODULE_DESCRIPTION("Host AP common routines");
39 MODULE_LICENSE("GPL");
40
41 #define TX_TIMEOUT (2 * HZ)
42
43 #define PRISM2_MAX_FRAME_SIZE 2304
44 #define PRISM2_MIN_MTU 256
45 /* FIX: */
46 #define PRISM2_MAX_MTU (PRISM2_MAX_FRAME_SIZE - (6 /* LLC */ + 8 /* WEP */))
47
48
49 struct net_device * hostap_add_interface(struct local_info *local,
50 int type, int rtnl_locked,
51 const char *prefix,
52 const char *name)
53 {
54 struct net_device *dev, *mdev;
55 struct hostap_interface *iface;
56 int ret;
57
58 dev = alloc_etherdev(sizeof(struct hostap_interface));
59 if (dev == NULL)
60 return NULL;
61
62 iface = netdev_priv(dev);
63 iface->dev = dev;
64 iface->local = local;
65 iface->type = type;
66 list_add(&iface->list, &local->hostap_interfaces);
67
68 mdev = local->dev;
69 memcpy(dev->dev_addr, mdev->dev_addr, ETH_ALEN);
70 dev->base_addr = mdev->base_addr;
71 dev->irq = mdev->irq;
72 dev->mem_start = mdev->mem_start;
73 dev->mem_end = mdev->mem_end;
74
75 hostap_setup_dev(dev, local, type);
76 dev->destructor = free_netdev;
77
78 sprintf(dev->name, "%s%s", prefix, name);
79 if (!rtnl_locked)
80 rtnl_lock();
81
82 ret = 0;
83 if (strchr(dev->name, '%'))
84 ret = dev_alloc_name(dev, dev->name);
85
86 SET_NETDEV_DEV(dev, mdev->dev.parent);
87 if (ret >= 0)
88 ret = register_netdevice(dev);
89
90 if (!rtnl_locked)
91 rtnl_unlock();
92
93 if (ret < 0) {
94 printk(KERN_WARNING "%s: failed to add new netdevice!\n",
95 dev->name);
96 free_netdev(dev);
97 return NULL;
98 }
99
100 printk(KERN_DEBUG "%s: registered netdevice %s\n",
101 mdev->name, dev->name);
102
103 return dev;
104 }
105
106
107 void hostap_remove_interface(struct net_device *dev, int rtnl_locked,
108 int remove_from_list)
109 {
110 struct hostap_interface *iface;
111
112 if (!dev)
113 return;
114
115 iface = netdev_priv(dev);
116
117 if (remove_from_list) {
118 list_del(&iface->list);
119 }
120
121 if (dev == iface->local->ddev)
122 iface->local->ddev = NULL;
123 else if (dev == iface->local->apdev)
124 iface->local->apdev = NULL;
125 else if (dev == iface->local->stadev)
126 iface->local->stadev = NULL;
127
128 if (rtnl_locked)
129 unregister_netdevice(dev);
130 else
131 unregister_netdev(dev);
132
133 /* dev->destructor = free_netdev() will free the device data, including
134 * private data, when removing the device */
135 }
136
137
138 static inline int prism2_wds_special_addr(u8 *addr)
139 {
140 if (addr[0] || addr[1] || addr[2] || addr[3] || addr[4] || addr[5])
141 return 0;
142
143 return 1;
144 }
145
146
147 int prism2_wds_add(local_info_t *local, u8 *remote_addr,
148 int rtnl_locked)
149 {
150 struct net_device *dev;
151 struct list_head *ptr;
152 struct hostap_interface *iface, *empty, *match;
153
154 empty = match = NULL;
155 read_lock_bh(&local->iface_lock);
156 list_for_each(ptr, &local->hostap_interfaces) {
157 iface = list_entry(ptr, struct hostap_interface, list);
158 if (iface->type != HOSTAP_INTERFACE_WDS)
159 continue;
160
161 if (prism2_wds_special_addr(iface->u.wds.remote_addr))
162 empty = iface;
163 else if (memcmp(iface->u.wds.remote_addr, remote_addr,
164 ETH_ALEN) == 0) {
165 match = iface;
166 break;
167 }
168 }
169 if (!match && empty && !prism2_wds_special_addr(remote_addr)) {
170 /* take pre-allocated entry into use */
171 memcpy(empty->u.wds.remote_addr, remote_addr, ETH_ALEN);
172 read_unlock_bh(&local->iface_lock);
173 printk(KERN_DEBUG "%s: using pre-allocated WDS netdevice %s\n",
174 local->dev->name, empty->dev->name);
175 return 0;
176 }
177 read_unlock_bh(&local->iface_lock);
178
179 if (!prism2_wds_special_addr(remote_addr)) {
180 if (match)
181 return -EEXIST;
182 hostap_add_sta(local->ap, remote_addr);
183 }
184
185 if (local->wds_connections >= local->wds_max_connections)
186 return -ENOBUFS;
187
188 /* verify that there is room for wds# postfix in the interface name */
189 if (strlen(local->dev->name) >= IFNAMSIZ - 5) {
190 printk(KERN_DEBUG "'%s' too long base device name\n",
191 local->dev->name);
192 return -EINVAL;
193 }
194
195 dev = hostap_add_interface(local, HOSTAP_INTERFACE_WDS, rtnl_locked,
196 local->ddev->name, "wds%d");
197 if (dev == NULL)
198 return -ENOMEM;
199
200 iface = netdev_priv(dev);
201 memcpy(iface->u.wds.remote_addr, remote_addr, ETH_ALEN);
202
203 local->wds_connections++;
204
205 return 0;
206 }
207
208
209 int prism2_wds_del(local_info_t *local, u8 *remote_addr,
210 int rtnl_locked, int do_not_remove)
211 {
212 unsigned long flags;
213 struct list_head *ptr;
214 struct hostap_interface *iface, *selected = NULL;
215
216 write_lock_irqsave(&local->iface_lock, flags);
217 list_for_each(ptr, &local->hostap_interfaces) {
218 iface = list_entry(ptr, struct hostap_interface, list);
219 if (iface->type != HOSTAP_INTERFACE_WDS)
220 continue;
221
222 if (memcmp(iface->u.wds.remote_addr, remote_addr,
223 ETH_ALEN) == 0) {
224 selected = iface;
225 break;
226 }
227 }
228 if (selected && !do_not_remove)
229 list_del(&selected->list);
230 write_unlock_irqrestore(&local->iface_lock, flags);
231
232 if (selected) {
233 if (do_not_remove)
234 memset(selected->u.wds.remote_addr, 0, ETH_ALEN);
235 else {
236 hostap_remove_interface(selected->dev, rtnl_locked, 0);
237 local->wds_connections--;
238 }
239 }
240
241 return selected ? 0 : -ENODEV;
242 }
243
244
245 u16 hostap_tx_callback_register(local_info_t *local,
246 void (*func)(struct sk_buff *, int ok, void *),
247 void *data)
248 {
249 unsigned long flags;
250 struct hostap_tx_callback_info *entry;
251
252 entry = kmalloc(sizeof(*entry),
253 GFP_ATOMIC);
254 if (entry == NULL)
255 return 0;
256
257 entry->func = func;
258 entry->data = data;
259
260 spin_lock_irqsave(&local->lock, flags);
261 entry->idx = local->tx_callback ? local->tx_callback->idx + 1 : 1;
262 entry->next = local->tx_callback;
263 local->tx_callback = entry;
264 spin_unlock_irqrestore(&local->lock, flags);
265
266 return entry->idx;
267 }
268
269
270 int hostap_tx_callback_unregister(local_info_t *local, u16 idx)
271 {
272 unsigned long flags;
273 struct hostap_tx_callback_info *cb, *prev = NULL;
274
275 spin_lock_irqsave(&local->lock, flags);
276 cb = local->tx_callback;
277 while (cb != NULL && cb->idx != idx) {
278 prev = cb;
279 cb = cb->next;
280 }
281 if (cb) {
282 if (prev == NULL)
283 local->tx_callback = cb->next;
284 else
285 prev->next = cb->next;
286 kfree(cb);
287 }
288 spin_unlock_irqrestore(&local->lock, flags);
289
290 return cb ? 0 : -1;
291 }
292
293
294 /* val is in host byte order */
295 int hostap_set_word(struct net_device *dev, int rid, u16 val)
296 {
297 struct hostap_interface *iface;
298 __le16 tmp = cpu_to_le16(val);
299 iface = netdev_priv(dev);
300 return iface->local->func->set_rid(dev, rid, &tmp, 2);
301 }
302
303
304 int hostap_set_string(struct net_device *dev, int rid, const char *val)
305 {
306 struct hostap_interface *iface;
307 char buf[MAX_SSID_LEN + 2];
308 int len;
309
310 iface = netdev_priv(dev);
311 len = strlen(val);
312 if (len > MAX_SSID_LEN)
313 return -1;
314 memset(buf, 0, sizeof(buf));
315 buf[0] = len; /* little endian 16 bit word */
316 memcpy(buf + 2, val, len);
317
318 return iface->local->func->set_rid(dev, rid, &buf, MAX_SSID_LEN + 2);
319 }
320
321
322 u16 hostap_get_porttype(local_info_t *local)
323 {
324 if (local->iw_mode == IW_MODE_ADHOC && local->pseudo_adhoc)
325 return HFA384X_PORTTYPE_PSEUDO_IBSS;
326 if (local->iw_mode == IW_MODE_ADHOC)
327 return HFA384X_PORTTYPE_IBSS;
328 if (local->iw_mode == IW_MODE_INFRA)
329 return HFA384X_PORTTYPE_BSS;
330 if (local->iw_mode == IW_MODE_REPEAT)
331 return HFA384X_PORTTYPE_WDS;
332 if (local->iw_mode == IW_MODE_MONITOR)
333 return HFA384X_PORTTYPE_PSEUDO_IBSS;
334 return HFA384X_PORTTYPE_HOSTAP;
335 }
336
337
338 int hostap_set_encryption(local_info_t *local)
339 {
340 u16 val, old_val;
341 int i, keylen, len, idx;
342 char keybuf[WEP_KEY_LEN + 1];
343 enum { NONE, WEP, OTHER } encrypt_type;
344
345 idx = local->crypt_info.tx_keyidx;
346 if (local->crypt_info.crypt[idx] == NULL ||
347 local->crypt_info.crypt[idx]->ops == NULL)
348 encrypt_type = NONE;
349 else if (strcmp(local->crypt_info.crypt[idx]->ops->name, "WEP") == 0)
350 encrypt_type = WEP;
351 else
352 encrypt_type = OTHER;
353
354 if (local->func->get_rid(local->dev, HFA384X_RID_CNFWEPFLAGS, &val, 2,
355 1) < 0) {
356 printk(KERN_DEBUG "Could not read current WEP flags.\n");
357 goto fail;
358 }
359 le16_to_cpus(&val);
360 old_val = val;
361
362 if (encrypt_type != NONE || local->privacy_invoked)
363 val |= HFA384X_WEPFLAGS_PRIVACYINVOKED;
364 else
365 val &= ~HFA384X_WEPFLAGS_PRIVACYINVOKED;
366
367 if (local->open_wep || encrypt_type == NONE ||
368 ((local->ieee_802_1x || local->wpa) && local->host_decrypt))
369 val &= ~HFA384X_WEPFLAGS_EXCLUDEUNENCRYPTED;
370 else
371 val |= HFA384X_WEPFLAGS_EXCLUDEUNENCRYPTED;
372
373 if ((encrypt_type != NONE || local->privacy_invoked) &&
374 (encrypt_type == OTHER || local->host_encrypt))
375 val |= HFA384X_WEPFLAGS_HOSTENCRYPT;
376 else
377 val &= ~HFA384X_WEPFLAGS_HOSTENCRYPT;
378 if ((encrypt_type != NONE || local->privacy_invoked) &&
379 (encrypt_type == OTHER || local->host_decrypt))
380 val |= HFA384X_WEPFLAGS_HOSTDECRYPT;
381 else
382 val &= ~HFA384X_WEPFLAGS_HOSTDECRYPT;
383
384 if (val != old_val &&
385 hostap_set_word(local->dev, HFA384X_RID_CNFWEPFLAGS, val)) {
386 printk(KERN_DEBUG "Could not write new WEP flags (0x%x)\n",
387 val);
388 goto fail;
389 }
390
391 if (encrypt_type != WEP)
392 return 0;
393
394 /* 104-bit support seems to require that all the keys are set to the
395 * same keylen */
396 keylen = 6; /* first 5 octets */
397 len = local->crypt_info.crypt[idx]->ops->get_key(keybuf, sizeof(keybuf), NULL,
398 local->crypt_info.crypt[idx]->priv);
399 if (idx >= 0 && idx < WEP_KEYS && len > 5)
400 keylen = WEP_KEY_LEN + 1; /* first 13 octets */
401
402 for (i = 0; i < WEP_KEYS; i++) {
403 memset(keybuf, 0, sizeof(keybuf));
404 if (local->crypt_info.crypt[i]) {
405 (void) local->crypt_info.crypt[i]->ops->get_key(
406 keybuf, sizeof(keybuf),
407 NULL, local->crypt_info.crypt[i]->priv);
408 }
409 if (local->func->set_rid(local->dev,
410 HFA384X_RID_CNFDEFAULTKEY0 + i,
411 keybuf, keylen)) {
412 printk(KERN_DEBUG "Could not set key %d (len=%d)\n",
413 i, keylen);
414 goto fail;
415 }
416 }
417 if (hostap_set_word(local->dev, HFA384X_RID_CNFWEPDEFAULTKEYID, idx)) {
418 printk(KERN_DEBUG "Could not set default keyid %d\n", idx);
419 goto fail;
420 }
421
422 return 0;
423
424 fail:
425 printk(KERN_DEBUG "%s: encryption setup failed\n", local->dev->name);
426 return -1;
427 }
428
429
430 int hostap_set_antsel(local_info_t *local)
431 {
432 u16 val;
433 int ret = 0;
434
435 if (local->antsel_tx != HOSTAP_ANTSEL_DO_NOT_TOUCH &&
436 local->func->cmd(local->dev, HFA384X_CMDCODE_READMIF,
437 HFA386X_CR_TX_CONFIGURE,
438 NULL, &val) == 0) {
439 val &= ~(BIT(2) | BIT(1));
440 switch (local->antsel_tx) {
441 case HOSTAP_ANTSEL_DIVERSITY:
442 val |= BIT(1);
443 break;
444 case HOSTAP_ANTSEL_LOW:
445 break;
446 case HOSTAP_ANTSEL_HIGH:
447 val |= BIT(2);
448 break;
449 }
450
451 if (local->func->cmd(local->dev, HFA384X_CMDCODE_WRITEMIF,
452 HFA386X_CR_TX_CONFIGURE, &val, NULL)) {
453 printk(KERN_INFO "%s: setting TX AntSel failed\n",
454 local->dev->name);
455 ret = -1;
456 }
457 }
458
459 if (local->antsel_rx != HOSTAP_ANTSEL_DO_NOT_TOUCH &&
460 local->func->cmd(local->dev, HFA384X_CMDCODE_READMIF,
461 HFA386X_CR_RX_CONFIGURE,
462 NULL, &val) == 0) {
463 val &= ~(BIT(1) | BIT(0));
464 switch (local->antsel_rx) {
465 case HOSTAP_ANTSEL_DIVERSITY:
466 break;
467 case HOSTAP_ANTSEL_LOW:
468 val |= BIT(0);
469 break;
470 case HOSTAP_ANTSEL_HIGH:
471 val |= BIT(0) | BIT(1);
472 break;
473 }
474
475 if (local->func->cmd(local->dev, HFA384X_CMDCODE_WRITEMIF,
476 HFA386X_CR_RX_CONFIGURE, &val, NULL)) {
477 printk(KERN_INFO "%s: setting RX AntSel failed\n",
478 local->dev->name);
479 ret = -1;
480 }
481 }
482
483 return ret;
484 }
485
486
487 int hostap_set_roaming(local_info_t *local)
488 {
489 u16 val;
490
491 switch (local->host_roaming) {
492 case 1:
493 val = HFA384X_ROAMING_HOST;
494 break;
495 case 2:
496 val = HFA384X_ROAMING_DISABLED;
497 break;
498 case 0:
499 default:
500 val = HFA384X_ROAMING_FIRMWARE;
501 break;
502 }
503
504 return hostap_set_word(local->dev, HFA384X_RID_CNFROAMINGMODE, val);
505 }
506
507
508 int hostap_set_auth_algs(local_info_t *local)
509 {
510 int val = local->auth_algs;
511 /* At least STA f/w v0.6.2 seems to have issues with cnfAuthentication
512 * set to include both Open and Shared Key flags. It tries to use
513 * Shared Key authentication in that case even if WEP keys are not
514 * configured.. STA f/w v0.7.6 is able to handle such configuration,
515 * but it is unknown when this was fixed between 0.6.2 .. 0.7.6. */
516 if (local->sta_fw_ver < PRISM2_FW_VER(0,7,0) &&
517 val != PRISM2_AUTH_OPEN && val != PRISM2_AUTH_SHARED_KEY)
518 val = PRISM2_AUTH_OPEN;
519
520 if (hostap_set_word(local->dev, HFA384X_RID_CNFAUTHENTICATION, val)) {
521 printk(KERN_INFO "%s: cnfAuthentication setting to 0x%x "
522 "failed\n", local->dev->name, local->auth_algs);
523 return -EINVAL;
524 }
525
526 return 0;
527 }
528
529
530 void hostap_dump_rx_header(const char *name, const struct hfa384x_rx_frame *rx)
531 {
532 u16 status, fc;
533
534 status = __le16_to_cpu(rx->status);
535
536 printk(KERN_DEBUG "%s: RX status=0x%04x (port=%d, type=%d, "
537 "fcserr=%d) silence=%d signal=%d rate=%d rxflow=%d; "
538 "jiffies=%ld\n",
539 name, status, (status >> 8) & 0x07, status >> 13, status & 1,
540 rx->silence, rx->signal, rx->rate, rx->rxflow, jiffies);
541
542 fc = __le16_to_cpu(rx->frame_control);
543 printk(KERN_DEBUG " FC=0x%04x (type=%d:%d) dur=0x%04x seq=0x%04x "
544 "data_len=%d%s%s\n",
545 fc, (fc & IEEE80211_FCTL_FTYPE) >> 2,
546 (fc & IEEE80211_FCTL_STYPE) >> 4,
547 __le16_to_cpu(rx->duration_id), __le16_to_cpu(rx->seq_ctrl),
548 __le16_to_cpu(rx->data_len),
549 fc & IEEE80211_FCTL_TODS ? " [ToDS]" : "",
550 fc & IEEE80211_FCTL_FROMDS ? " [FromDS]" : "");
551
552 printk(KERN_DEBUG " A1=%pM A2=%pM A3=%pM A4=%pM\n",
553 rx->addr1, rx->addr2, rx->addr3, rx->addr4);
554
555 printk(KERN_DEBUG " dst=%pM src=%pM len=%d\n",
556 rx->dst_addr, rx->src_addr,
557 __be16_to_cpu(rx->len));
558 }
559
560
561 void hostap_dump_tx_header(const char *name, const struct hfa384x_tx_frame *tx)
562 {
563 u16 fc;
564
565 printk(KERN_DEBUG "%s: TX status=0x%04x retry_count=%d tx_rate=%d "
566 "tx_control=0x%04x; jiffies=%ld\n",
567 name, __le16_to_cpu(tx->status), tx->retry_count, tx->tx_rate,
568 __le16_to_cpu(tx->tx_control), jiffies);
569
570 fc = __le16_to_cpu(tx->frame_control);
571 printk(KERN_DEBUG " FC=0x%04x (type=%d:%d) dur=0x%04x seq=0x%04x "
572 "data_len=%d%s%s\n",
573 fc, (fc & IEEE80211_FCTL_FTYPE) >> 2,
574 (fc & IEEE80211_FCTL_STYPE) >> 4,
575 __le16_to_cpu(tx->duration_id), __le16_to_cpu(tx->seq_ctrl),
576 __le16_to_cpu(tx->data_len),
577 fc & IEEE80211_FCTL_TODS ? " [ToDS]" : "",
578 fc & IEEE80211_FCTL_FROMDS ? " [FromDS]" : "");
579
580 printk(KERN_DEBUG " A1=%pM A2=%pM A3=%pM A4=%pM\n",
581 tx->addr1, tx->addr2, tx->addr3, tx->addr4);
582
583 printk(KERN_DEBUG " dst=%pM src=%pM len=%d\n",
584 tx->dst_addr, tx->src_addr,
585 __be16_to_cpu(tx->len));
586 }
587
588
589 static int hostap_80211_header_parse(const struct sk_buff *skb,
590 unsigned char *haddr)
591 {
592 memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
593 return ETH_ALEN;
594 }
595
596
597 int hostap_80211_get_hdrlen(__le16 fc)
598 {
599 if (ieee80211_is_data(fc) && ieee80211_has_a4 (fc))
600 return 30; /* Addr4 */
601 else if (ieee80211_is_cts(fc) || ieee80211_is_ack(fc))
602 return 10;
603 else if (ieee80211_is_ctl(fc))
604 return 16;
605
606 return 24;
607 }
608
609
610 static int prism2_close(struct net_device *dev)
611 {
612 struct hostap_interface *iface;
613 local_info_t *local;
614
615 PDEBUG(DEBUG_FLOW, "%s: prism2_close\n", dev->name);
616
617 iface = netdev_priv(dev);
618 local = iface->local;
619
620 if (dev == local->ddev) {
621 prism2_sta_deauth(local, WLAN_REASON_DEAUTH_LEAVING);
622 }
623 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
624 if (!local->hostapd && dev == local->dev &&
625 (!local->func->card_present || local->func->card_present(local)) &&
626 local->hw_ready && local->ap && local->iw_mode == IW_MODE_MASTER)
627 hostap_deauth_all_stas(dev, local->ap, 1);
628 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
629
630 if (dev == local->dev) {
631 local->func->hw_shutdown(dev, HOSTAP_HW_ENABLE_CMDCOMPL);
632 }
633
634 if (netif_running(dev)) {
635 netif_stop_queue(dev);
636 netif_device_detach(dev);
637 }
638
639 cancel_work_sync(&local->reset_queue);
640 cancel_work_sync(&local->set_multicast_list_queue);
641 cancel_work_sync(&local->set_tim_queue);
642 #ifndef PRISM2_NO_STATION_MODES
643 cancel_work_sync(&local->info_queue);
644 #endif
645 cancel_work_sync(&local->comms_qual_update);
646
647 module_put(local->hw_module);
648
649 local->num_dev_open--;
650
651 if (dev != local->dev && local->dev->flags & IFF_UP &&
652 local->master_dev_auto_open && local->num_dev_open == 1) {
653 /* Close master radio interface automatically if it was also
654 * opened automatically and we are now closing the last
655 * remaining non-master device. */
656 dev_close(local->dev);
657 }
658
659 return 0;
660 }
661
662
663 static int prism2_open(struct net_device *dev)
664 {
665 struct hostap_interface *iface;
666 local_info_t *local;
667
668 PDEBUG(DEBUG_FLOW, "%s: prism2_open\n", dev->name);
669
670 iface = netdev_priv(dev);
671 local = iface->local;
672
673 if (local->no_pri) {
674 printk(KERN_DEBUG "%s: could not set interface UP - no PRI "
675 "f/w\n", dev->name);
676 return 1;
677 }
678
679 if ((local->func->card_present && !local->func->card_present(local)) ||
680 local->hw_downloading)
681 return -ENODEV;
682
683 if (!try_module_get(local->hw_module))
684 return -ENODEV;
685 local->num_dev_open++;
686
687 if (!local->dev_enabled && local->func->hw_enable(dev, 1)) {
688 printk(KERN_WARNING "%s: could not enable MAC port\n",
689 dev->name);
690 prism2_close(dev);
691 return 1;
692 }
693 if (!local->dev_enabled)
694 prism2_callback(local, PRISM2_CALLBACK_ENABLE);
695 local->dev_enabled = 1;
696
697 if (dev != local->dev && !(local->dev->flags & IFF_UP)) {
698 /* Master radio interface is needed for all operation, so open
699 * it automatically when any virtual net_device is opened. */
700 local->master_dev_auto_open = 1;
701 dev_open(local->dev);
702 }
703
704 netif_device_attach(dev);
705 netif_start_queue(dev);
706
707 return 0;
708 }
709
710
711 static int prism2_set_mac_address(struct net_device *dev, void *p)
712 {
713 struct hostap_interface *iface;
714 local_info_t *local;
715 struct list_head *ptr;
716 struct sockaddr *addr = p;
717
718 iface = netdev_priv(dev);
719 local = iface->local;
720
721 if (local->func->set_rid(dev, HFA384X_RID_CNFOWNMACADDR, addr->sa_data,
722 ETH_ALEN) < 0 || local->func->reset_port(dev))
723 return -EINVAL;
724
725 read_lock_bh(&local->iface_lock);
726 list_for_each(ptr, &local->hostap_interfaces) {
727 iface = list_entry(ptr, struct hostap_interface, list);
728 memcpy(iface->dev->dev_addr, addr->sa_data, ETH_ALEN);
729 }
730 memcpy(local->dev->dev_addr, addr->sa_data, ETH_ALEN);
731 read_unlock_bh(&local->iface_lock);
732
733 return 0;
734 }
735
736
737 /* TODO: to be further implemented as soon as Prism2 fully supports
738 * GroupAddresses and correct documentation is available */
739 void hostap_set_multicast_list_queue(struct work_struct *work)
740 {
741 local_info_t *local =
742 container_of(work, local_info_t, set_multicast_list_queue);
743 struct net_device *dev = local->dev;
744
745 if (hostap_set_word(dev, HFA384X_RID_PROMISCUOUSMODE,
746 local->is_promisc)) {
747 printk(KERN_INFO "%s: %sabling promiscuous mode failed\n",
748 dev->name, local->is_promisc ? "en" : "dis");
749 }
750 }
751
752
753 static void hostap_set_multicast_list(struct net_device *dev)
754 {
755 #if 0
756 /* FIX: promiscuous mode seems to be causing a lot of problems with
757 * some station firmware versions (FCSErr frames, invalid MACPort, etc.
758 * corrupted incoming frames). This code is now commented out while the
759 * problems are investigated. */
760 struct hostap_interface *iface;
761 local_info_t *local;
762
763 iface = netdev_priv(dev);
764 local = iface->local;
765 if ((dev->flags & IFF_ALLMULTI) || (dev->flags & IFF_PROMISC)) {
766 local->is_promisc = 1;
767 } else {
768 local->is_promisc = 0;
769 }
770
771 schedule_work(&local->set_multicast_list_queue);
772 #endif
773 }
774
775
776 static int prism2_change_mtu(struct net_device *dev, int new_mtu)
777 {
778 if (new_mtu < PRISM2_MIN_MTU || new_mtu > PRISM2_MAX_MTU)
779 return -EINVAL;
780
781 dev->mtu = new_mtu;
782 return 0;
783 }
784
785
786 static void prism2_tx_timeout(struct net_device *dev)
787 {
788 struct hostap_interface *iface;
789 local_info_t *local;
790 struct hfa384x_regs regs;
791
792 iface = netdev_priv(dev);
793 local = iface->local;
794
795 printk(KERN_WARNING "%s Tx timed out! Resetting card\n", dev->name);
796 netif_stop_queue(local->dev);
797
798 local->func->read_regs(dev, &regs);
799 printk(KERN_DEBUG "%s: CMD=%04x EVSTAT=%04x "
800 "OFFSET0=%04x OFFSET1=%04x SWSUPPORT0=%04x\n",
801 dev->name, regs.cmd, regs.evstat, regs.offset0, regs.offset1,
802 regs.swsupport0);
803
804 local->func->schedule_reset(local);
805 }
806
807 const struct header_ops hostap_80211_ops = {
808 .create = eth_header,
809 .rebuild = eth_rebuild_header,
810 .cache = eth_header_cache,
811 .cache_update = eth_header_cache_update,
812 .parse = hostap_80211_header_parse,
813 };
814 EXPORT_SYMBOL(hostap_80211_ops);
815
816
817 static const struct net_device_ops hostap_netdev_ops = {
818 .ndo_start_xmit = hostap_data_start_xmit,
819
820 .ndo_open = prism2_open,
821 .ndo_stop = prism2_close,
822 .ndo_do_ioctl = hostap_ioctl,
823 .ndo_set_mac_address = prism2_set_mac_address,
824 .ndo_set_multicast_list = hostap_set_multicast_list,
825 .ndo_change_mtu = prism2_change_mtu,
826 .ndo_tx_timeout = prism2_tx_timeout,
827 .ndo_validate_addr = eth_validate_addr,
828 };
829
830 static const struct net_device_ops hostap_mgmt_netdev_ops = {
831 .ndo_start_xmit = hostap_mgmt_start_xmit,
832
833 .ndo_open = prism2_open,
834 .ndo_stop = prism2_close,
835 .ndo_do_ioctl = hostap_ioctl,
836 .ndo_set_mac_address = prism2_set_mac_address,
837 .ndo_set_multicast_list = hostap_set_multicast_list,
838 .ndo_change_mtu = prism2_change_mtu,
839 .ndo_tx_timeout = prism2_tx_timeout,
840 .ndo_validate_addr = eth_validate_addr,
841 };
842
843 static const struct net_device_ops hostap_master_ops = {
844 .ndo_start_xmit = hostap_master_start_xmit,
845
846 .ndo_open = prism2_open,
847 .ndo_stop = prism2_close,
848 .ndo_do_ioctl = hostap_ioctl,
849 .ndo_set_mac_address = prism2_set_mac_address,
850 .ndo_set_multicast_list = hostap_set_multicast_list,
851 .ndo_change_mtu = prism2_change_mtu,
852 .ndo_tx_timeout = prism2_tx_timeout,
853 .ndo_validate_addr = eth_validate_addr,
854 };
855
856 void hostap_setup_dev(struct net_device *dev, local_info_t *local,
857 int type)
858 {
859 struct hostap_interface *iface;
860
861 iface = netdev_priv(dev);
862 ether_setup(dev);
863
864 /* kernel callbacks */
865 if (iface) {
866 /* Currently, we point to the proper spy_data only on
867 * the main_dev. This could be fixed. Jean II */
868 iface->wireless_data.spy_data = &iface->spy_data;
869 dev->wireless_data = &iface->wireless_data;
870 }
871 dev->wireless_handlers = &hostap_iw_handler_def;
872 dev->watchdog_timeo = TX_TIMEOUT;
873
874 switch(type) {
875 case HOSTAP_INTERFACE_AP:
876 dev->tx_queue_len = 0; /* use main radio device queue */
877 dev->netdev_ops = &hostap_mgmt_netdev_ops;
878 dev->type = ARPHRD_IEEE80211;
879 dev->header_ops = &hostap_80211_ops;
880 break;
881 case HOSTAP_INTERFACE_MASTER:
882 dev->netdev_ops = &hostap_master_ops;
883 break;
884 default:
885 dev->tx_queue_len = 0; /* use main radio device queue */
886 dev->netdev_ops = &hostap_netdev_ops;
887 }
888
889 dev->mtu = local->mtu;
890
891
892 SET_ETHTOOL_OPS(dev, &prism2_ethtool_ops);
893
894 netif_stop_queue(dev);
895 }
896
897 static int hostap_enable_hostapd(local_info_t *local, int rtnl_locked)
898 {
899 struct net_device *dev = local->dev;
900
901 if (local->apdev)
902 return -EEXIST;
903
904 printk(KERN_DEBUG "%s: enabling hostapd mode\n", dev->name);
905
906 local->apdev = hostap_add_interface(local, HOSTAP_INTERFACE_AP,
907 rtnl_locked, local->ddev->name,
908 "ap");
909 if (local->apdev == NULL)
910 return -ENOMEM;
911
912 return 0;
913 }
914
915
916 static int hostap_disable_hostapd(local_info_t *local, int rtnl_locked)
917 {
918 struct net_device *dev = local->dev;
919
920 printk(KERN_DEBUG "%s: disabling hostapd mode\n", dev->name);
921
922 hostap_remove_interface(local->apdev, rtnl_locked, 1);
923 local->apdev = NULL;
924
925 return 0;
926 }
927
928
929 static int hostap_enable_hostapd_sta(local_info_t *local, int rtnl_locked)
930 {
931 struct net_device *dev = local->dev;
932
933 if (local->stadev)
934 return -EEXIST;
935
936 printk(KERN_DEBUG "%s: enabling hostapd STA mode\n", dev->name);
937
938 local->stadev = hostap_add_interface(local, HOSTAP_INTERFACE_STA,
939 rtnl_locked, local->ddev->name,
940 "sta");
941 if (local->stadev == NULL)
942 return -ENOMEM;
943
944 return 0;
945 }
946
947
948 static int hostap_disable_hostapd_sta(local_info_t *local, int rtnl_locked)
949 {
950 struct net_device *dev = local->dev;
951
952 printk(KERN_DEBUG "%s: disabling hostapd mode\n", dev->name);
953
954 hostap_remove_interface(local->stadev, rtnl_locked, 1);
955 local->stadev = NULL;
956
957 return 0;
958 }
959
960
961 int hostap_set_hostapd(local_info_t *local, int val, int rtnl_locked)
962 {
963 int ret;
964
965 if (val < 0 || val > 1)
966 return -EINVAL;
967
968 if (local->hostapd == val)
969 return 0;
970
971 if (val) {
972 ret = hostap_enable_hostapd(local, rtnl_locked);
973 if (ret == 0)
974 local->hostapd = 1;
975 } else {
976 local->hostapd = 0;
977 ret = hostap_disable_hostapd(local, rtnl_locked);
978 if (ret != 0)
979 local->hostapd = 1;
980 }
981
982 return ret;
983 }
984
985
986 int hostap_set_hostapd_sta(local_info_t *local, int val, int rtnl_locked)
987 {
988 int ret;
989
990 if (val < 0 || val > 1)
991 return -EINVAL;
992
993 if (local->hostapd_sta == val)
994 return 0;
995
996 if (val) {
997 ret = hostap_enable_hostapd_sta(local, rtnl_locked);
998 if (ret == 0)
999 local->hostapd_sta = 1;
1000 } else {
1001 local->hostapd_sta = 0;
1002 ret = hostap_disable_hostapd_sta(local, rtnl_locked);
1003 if (ret != 0)
1004 local->hostapd_sta = 1;
1005 }
1006
1007
1008 return ret;
1009 }
1010
1011
1012 int prism2_update_comms_qual(struct net_device *dev)
1013 {
1014 struct hostap_interface *iface;
1015 local_info_t *local;
1016 int ret = 0;
1017 struct hfa384x_comms_quality sq;
1018
1019 iface = netdev_priv(dev);
1020 local = iface->local;
1021 if (!local->sta_fw_ver)
1022 ret = -1;
1023 else if (local->sta_fw_ver >= PRISM2_FW_VER(1,3,1)) {
1024 if (local->func->get_rid(local->dev,
1025 HFA384X_RID_DBMCOMMSQUALITY,
1026 &sq, sizeof(sq), 1) >= 0) {
1027 local->comms_qual = (s16) le16_to_cpu(sq.comm_qual);
1028 local->avg_signal = (s16) le16_to_cpu(sq.signal_level);
1029 local->avg_noise = (s16) le16_to_cpu(sq.noise_level);
1030 local->last_comms_qual_update = jiffies;
1031 } else
1032 ret = -1;
1033 } else {
1034 if (local->func->get_rid(local->dev, HFA384X_RID_COMMSQUALITY,
1035 &sq, sizeof(sq), 1) >= 0) {
1036 local->comms_qual = le16_to_cpu(sq.comm_qual);
1037 local->avg_signal = HFA384X_LEVEL_TO_dBm(
1038 le16_to_cpu(sq.signal_level));
1039 local->avg_noise = HFA384X_LEVEL_TO_dBm(
1040 le16_to_cpu(sq.noise_level));
1041 local->last_comms_qual_update = jiffies;
1042 } else
1043 ret = -1;
1044 }
1045
1046 return ret;
1047 }
1048
1049
1050 int prism2_sta_send_mgmt(local_info_t *local, u8 *dst, u16 stype,
1051 u8 *body, size_t bodylen)
1052 {
1053 struct sk_buff *skb;
1054 struct hostap_ieee80211_mgmt *mgmt;
1055 struct hostap_skb_tx_data *meta;
1056 struct net_device *dev = local->dev;
1057
1058 skb = dev_alloc_skb(IEEE80211_MGMT_HDR_LEN + bodylen);
1059 if (skb == NULL)
1060 return -ENOMEM;
1061
1062 mgmt = (struct hostap_ieee80211_mgmt *)
1063 skb_put(skb, IEEE80211_MGMT_HDR_LEN);
1064 memset(mgmt, 0, IEEE80211_MGMT_HDR_LEN);
1065 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1066 memcpy(mgmt->da, dst, ETH_ALEN);
1067 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1068 memcpy(mgmt->bssid, dst, ETH_ALEN);
1069 if (body)
1070 memcpy(skb_put(skb, bodylen), body, bodylen);
1071
1072 meta = (struct hostap_skb_tx_data *) skb->cb;
1073 memset(meta, 0, sizeof(*meta));
1074 meta->magic = HOSTAP_SKB_TX_DATA_MAGIC;
1075 meta->iface = netdev_priv(dev);
1076
1077 skb->dev = dev;
1078 skb_reset_mac_header(skb);
1079 skb_reset_network_header(skb);
1080 dev_queue_xmit(skb);
1081
1082 return 0;
1083 }
1084
1085
1086 int prism2_sta_deauth(local_info_t *local, u16 reason)
1087 {
1088 union iwreq_data wrqu;
1089 int ret;
1090 __le16 val = cpu_to_le16(reason);
1091
1092 if (local->iw_mode != IW_MODE_INFRA ||
1093 memcmp(local->bssid, "\x00\x00\x00\x00\x00\x00", ETH_ALEN) == 0 ||
1094 memcmp(local->bssid, "\x44\x44\x44\x44\x44\x44", ETH_ALEN) == 0)
1095 return 0;
1096
1097 ret = prism2_sta_send_mgmt(local, local->bssid, IEEE80211_STYPE_DEAUTH,
1098 (u8 *) &val, 2);
1099 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
1100 wireless_send_event(local->dev, SIOCGIWAP, &wrqu, NULL);
1101 return ret;
1102 }
1103
1104
1105 struct proc_dir_entry *hostap_proc;
1106
1107 static int __init hostap_init(void)
1108 {
1109 if (init_net.proc_net != NULL) {
1110 hostap_proc = proc_mkdir("hostap", init_net.proc_net);
1111 if (!hostap_proc)
1112 printk(KERN_WARNING "Failed to mkdir "
1113 "/proc/net/hostap\n");
1114 } else
1115 hostap_proc = NULL;
1116
1117 return 0;
1118 }
1119
1120
1121 static void __exit hostap_exit(void)
1122 {
1123 if (hostap_proc != NULL) {
1124 hostap_proc = NULL;
1125 remove_proc_entry("hostap", init_net.proc_net);
1126 }
1127 }
1128
1129
1130 EXPORT_SYMBOL(hostap_set_word);
1131 EXPORT_SYMBOL(hostap_set_string);
1132 EXPORT_SYMBOL(hostap_get_porttype);
1133 EXPORT_SYMBOL(hostap_set_encryption);
1134 EXPORT_SYMBOL(hostap_set_antsel);
1135 EXPORT_SYMBOL(hostap_set_roaming);
1136 EXPORT_SYMBOL(hostap_set_auth_algs);
1137 EXPORT_SYMBOL(hostap_dump_rx_header);
1138 EXPORT_SYMBOL(hostap_dump_tx_header);
1139 EXPORT_SYMBOL(hostap_80211_get_hdrlen);
1140 EXPORT_SYMBOL(hostap_setup_dev);
1141 EXPORT_SYMBOL(hostap_set_multicast_list_queue);
1142 EXPORT_SYMBOL(hostap_set_hostapd);
1143 EXPORT_SYMBOL(hostap_set_hostapd_sta);
1144 EXPORT_SYMBOL(hostap_add_interface);
1145 EXPORT_SYMBOL(hostap_remove_interface);
1146 EXPORT_SYMBOL(prism2_update_comms_qual);
1147
1148 module_init(hostap_init);
1149 module_exit(hostap_exit);
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