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Pull bugzilla-9429 into release branch
[pv_ops_mirror.git] / drivers / net / wireless / hostap / hostap_main.c
blob17c58e9bdad51178583f5d5844805e52f463415a
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/ieee80211.h>
30 #include <net/ieee80211_crypt.h>
31 #include <asm/uaccess.h>
32
33 #include "hostap_wlan.h"
34 #include "hostap_80211.h"
35 #include "hostap_ap.h"
36 #include "hostap.h"
37
38 MODULE_AUTHOR("Jouni Malinen");
39 MODULE_DESCRIPTION("Host AP common routines");
40 MODULE_LICENSE("GPL");
41
42 #define TX_TIMEOUT (2 * HZ)
43
44 #define PRISM2_MAX_FRAME_SIZE 2304
45 #define PRISM2_MIN_MTU 256
46 /* FIX: */
47 #define PRISM2_MAX_MTU (PRISM2_MAX_FRAME_SIZE - (6 /* LLC */ + 8 /* WEP */))
48
49
50 struct net_device * hostap_add_interface(struct local_info *local,
51 int type, int rtnl_locked,
52 const char *prefix,
53 const char *name)
54 {
55 struct net_device *dev, *mdev;
56 struct hostap_interface *iface;
57 int ret;
58
59 dev = alloc_etherdev(sizeof(struct hostap_interface));
60 if (dev == NULL)
61 return NULL;
62
63 iface = netdev_priv(dev);
64 iface->dev = dev;
65 iface->local = local;
66 iface->type = type;
67 list_add(&iface->list, &local->hostap_interfaces);
68
69 mdev = local->dev;
70 memcpy(dev->dev_addr, mdev->dev_addr, ETH_ALEN);
71 dev->base_addr = mdev->base_addr;
72 dev->irq = mdev->irq;
73 dev->mem_start = mdev->mem_start;
74 dev->mem_end = mdev->mem_end;
75
76 hostap_setup_dev(dev, local, type);
77 dev->destructor = free_netdev;
78
79 sprintf(dev->name, "%s%s", prefix, name);
80 if (!rtnl_locked)
81 rtnl_lock();
82
83 ret = 0;
84 if (strchr(dev->name, '%'))
85 ret = dev_alloc_name(dev, dev->name);
86
87 SET_NETDEV_DEV(dev, mdev->dev.parent);
88 if (ret >= 0)
89 ret = register_netdevice(dev);
90
91 if (!rtnl_locked)
92 rtnl_unlock();
93
94 if (ret < 0) {
95 printk(KERN_WARNING "%s: failed to add new netdevice!\n",
96 dev->name);
97 free_netdev(dev);
98 return NULL;
99 }
100
101 printk(KERN_DEBUG "%s: registered netdevice %s\n",
102 mdev->name, dev->name);
103
104 return dev;
105 }
106
107
108 void hostap_remove_interface(struct net_device *dev, int rtnl_locked,
109 int remove_from_list)
110 {
111 struct hostap_interface *iface;
112
113 if (!dev)
114 return;
115
116 iface = netdev_priv(dev);
117
118 if (remove_from_list) {
119 list_del(&iface->list);
120 }
121
122 if (dev == iface->local->ddev)
123 iface->local->ddev = NULL;
124 else if (dev == iface->local->apdev)
125 iface->local->apdev = NULL;
126 else if (dev == iface->local->stadev)
127 iface->local->stadev = NULL;
128
129 if (rtnl_locked)
130 unregister_netdevice(dev);
131 else
132 unregister_netdev(dev);
133
134 /* dev->destructor = free_netdev() will free the device data, including
135 * private data, when removing the device */
136 }
137
138
139 static inline int prism2_wds_special_addr(u8 *addr)
140 {
141 if (addr[0] || addr[1] || addr[2] || addr[3] || addr[4] || addr[5])
142 return 0;
143
144 return 1;
145 }
146
147
148 int prism2_wds_add(local_info_t *local, u8 *remote_addr,
149 int rtnl_locked)
150 {
151 struct net_device *dev;
152 struct list_head *ptr;
153 struct hostap_interface *iface, *empty, *match;
154
155 empty = match = NULL;
156 read_lock_bh(&local->iface_lock);
157 list_for_each(ptr, &local->hostap_interfaces) {
158 iface = list_entry(ptr, struct hostap_interface, list);
159 if (iface->type != HOSTAP_INTERFACE_WDS)
160 continue;
161
162 if (prism2_wds_special_addr(iface->u.wds.remote_addr))
163 empty = iface;
164 else if (memcmp(iface->u.wds.remote_addr, remote_addr,
165 ETH_ALEN) == 0) {
166 match = iface;
167 break;
168 }
169 }
170 if (!match && empty && !prism2_wds_special_addr(remote_addr)) {
171 /* take pre-allocated entry into use */
172 memcpy(empty->u.wds.remote_addr, remote_addr, ETH_ALEN);
173 read_unlock_bh(&local->iface_lock);
174 printk(KERN_DEBUG "%s: using pre-allocated WDS netdevice %s\n",
175 local->dev->name, empty->dev->name);
176 return 0;
177 }
178 read_unlock_bh(&local->iface_lock);
179
180 if (!prism2_wds_special_addr(remote_addr)) {
181 if (match)
182 return -EEXIST;
183 hostap_add_sta(local->ap, remote_addr);
184 }
185
186 if (local->wds_connections >= local->wds_max_connections)
187 return -ENOBUFS;
188
189 /* verify that there is room for wds# postfix in the interface name */
190 if (strlen(local->dev->name) > IFNAMSIZ - 5) {
191 printk(KERN_DEBUG "'%s' too long base device name\n",
192 local->dev->name);
193 return -EINVAL;
194 }
195
196 dev = hostap_add_interface(local, HOSTAP_INTERFACE_WDS, rtnl_locked,
197 local->ddev->name, "wds%d");
198 if (dev == NULL)
199 return -ENOMEM;
200
201 iface = netdev_priv(dev);
202 memcpy(iface->u.wds.remote_addr, remote_addr, ETH_ALEN);
203
204 local->wds_connections++;
205
206 return 0;
207 }
208
209
210 int prism2_wds_del(local_info_t *local, u8 *remote_addr,
211 int rtnl_locked, int do_not_remove)
212 {
213 unsigned long flags;
214 struct list_head *ptr;
215 struct hostap_interface *iface, *selected = NULL;
216
217 write_lock_irqsave(&local->iface_lock, flags);
218 list_for_each(ptr, &local->hostap_interfaces) {
219 iface = list_entry(ptr, struct hostap_interface, list);
220 if (iface->type != HOSTAP_INTERFACE_WDS)
221 continue;
222
223 if (memcmp(iface->u.wds.remote_addr, remote_addr,
224 ETH_ALEN) == 0) {
225 selected = iface;
226 break;
227 }
228 }
229 if (selected && !do_not_remove)
230 list_del(&selected->list);
231 write_unlock_irqrestore(&local->iface_lock, flags);
232
233 if (selected) {
234 if (do_not_remove)
235 memset(selected->u.wds.remote_addr, 0, ETH_ALEN);
236 else {
237 hostap_remove_interface(selected->dev, rtnl_locked, 0);
238 local->wds_connections--;
239 }
240 }
241
242 return selected ? 0 : -ENODEV;
243 }
244
245
246 u16 hostap_tx_callback_register(local_info_t *local,
247 void (*func)(struct sk_buff *, int ok, void *),
248 void *data)
249 {
250 unsigned long flags;
251 struct hostap_tx_callback_info *entry;
252
253 entry = kmalloc(sizeof(*entry),
254 GFP_ATOMIC);
255 if (entry == NULL)
256 return 0;
257
258 entry->func = func;
259 entry->data = data;
260
261 spin_lock_irqsave(&local->lock, flags);
262 entry->idx = local->tx_callback ? local->tx_callback->idx + 1 : 1;
263 entry->next = local->tx_callback;
264 local->tx_callback = entry;
265 spin_unlock_irqrestore(&local->lock, flags);
266
267 return entry->idx;
268 }
269
270
271 int hostap_tx_callback_unregister(local_info_t *local, u16 idx)
272 {
273 unsigned long flags;
274 struct hostap_tx_callback_info *cb, *prev = NULL;
275
276 spin_lock_irqsave(&local->lock, flags);
277 cb = local->tx_callback;
278 while (cb != NULL && cb->idx != idx) {
279 prev = cb;
280 cb = cb->next;
281 }
282 if (cb) {
283 if (prev == NULL)
284 local->tx_callback = cb->next;
285 else
286 prev->next = cb->next;
287 kfree(cb);
288 }
289 spin_unlock_irqrestore(&local->lock, flags);
290
291 return cb ? 0 : -1;
292 }
293
294
295 /* val is in host byte order */
296 int hostap_set_word(struct net_device *dev, int rid, u16 val)
297 {
298 struct hostap_interface *iface;
299 u16 tmp = cpu_to_le16(val);
300 iface = netdev_priv(dev);
301 return iface->local->func->set_rid(dev, rid, &tmp, 2);
302 }
303
304
305 int hostap_set_string(struct net_device *dev, int rid, const char *val)
306 {
307 struct hostap_interface *iface;
308 char buf[MAX_SSID_LEN + 2];
309 int len;
310
311 iface = netdev_priv(dev);
312 len = strlen(val);
313 if (len > MAX_SSID_LEN)
314 return -1;
315 memset(buf, 0, sizeof(buf));
316 buf[0] = len; /* little endian 16 bit word */
317 memcpy(buf + 2, val, len);
318
319 return iface->local->func->set_rid(dev, rid, &buf, MAX_SSID_LEN + 2);
320 }
321
322
323 u16 hostap_get_porttype(local_info_t *local)
324 {
325 if (local->iw_mode == IW_MODE_ADHOC && local->pseudo_adhoc)
326 return HFA384X_PORTTYPE_PSEUDO_IBSS;
327 if (local->iw_mode == IW_MODE_ADHOC)
328 return HFA384X_PORTTYPE_IBSS;
329 if (local->iw_mode == IW_MODE_INFRA)
330 return HFA384X_PORTTYPE_BSS;
331 if (local->iw_mode == IW_MODE_REPEAT)
332 return HFA384X_PORTTYPE_WDS;
333 if (local->iw_mode == IW_MODE_MONITOR)
334 return HFA384X_PORTTYPE_PSEUDO_IBSS;
335 return HFA384X_PORTTYPE_HOSTAP;
336 }
337
338
339 int hostap_set_encryption(local_info_t *local)
340 {
341 u16 val, old_val;
342 int i, keylen, len, idx;
343 char keybuf[WEP_KEY_LEN + 1];
344 enum { NONE, WEP, OTHER } encrypt_type;
345
346 idx = local->tx_keyidx;
347 if (local->crypt[idx] == NULL || local->crypt[idx]->ops == NULL)
348 encrypt_type = NONE;
349 else if (strcmp(local->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[idx]->ops->get_key(keybuf, sizeof(keybuf),
398 NULL, local->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[i]) {
405 (void) local->crypt[i]->ops->get_key(
406 keybuf, sizeof(keybuf),
407 NULL, local->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 DECLARE_MAC_BUF(mac);
534 DECLARE_MAC_BUF(mac2);
535 DECLARE_MAC_BUF(mac3);
536 DECLARE_MAC_BUF(mac4);
537
538 status = __le16_to_cpu(rx->status);
539
540 printk(KERN_DEBUG "%s: RX status=0x%04x (port=%d, type=%d, "
541 "fcserr=%d) silence=%d signal=%d rate=%d rxflow=%d; "
542 "jiffies=%ld\n",
543 name, status, (status >> 8) & 0x07, status >> 13, status & 1,
544 rx->silence, rx->signal, rx->rate, rx->rxflow, jiffies);
545
546 fc = __le16_to_cpu(rx->frame_control);
547 printk(KERN_DEBUG " FC=0x%04x (type=%d:%d) dur=0x%04x seq=0x%04x "
548 "data_len=%d%s%s\n",
549 fc, WLAN_FC_GET_TYPE(fc) >> 2, WLAN_FC_GET_STYPE(fc) >> 4,
550 __le16_to_cpu(rx->duration_id), __le16_to_cpu(rx->seq_ctrl),
551 __le16_to_cpu(rx->data_len),
552 fc & IEEE80211_FCTL_TODS ? " [ToDS]" : "",
553 fc & IEEE80211_FCTL_FROMDS ? " [FromDS]" : "");
554
555 printk(KERN_DEBUG " A1=%s A2=%s A3=%s A4=%s\n",
556 print_mac(mac, rx->addr1), print_mac(mac2, rx->addr2),
557 print_mac(mac3, rx->addr3), print_mac(mac4, rx->addr4));
558
559 printk(KERN_DEBUG " dst=%s src=%s len=%d\n",
560 print_mac(mac, rx->dst_addr), print_mac(mac2, rx->src_addr),
561 __be16_to_cpu(rx->len));
562 }
563
564
565 void hostap_dump_tx_header(const char *name, const struct hfa384x_tx_frame *tx)
566 {
567 u16 fc;
568 DECLARE_MAC_BUF(mac);
569 DECLARE_MAC_BUF(mac2);
570 DECLARE_MAC_BUF(mac3);
571 DECLARE_MAC_BUF(mac4);
572
573 printk(KERN_DEBUG "%s: TX status=0x%04x retry_count=%d tx_rate=%d "
574 "tx_control=0x%04x; jiffies=%ld\n",
575 name, __le16_to_cpu(tx->status), tx->retry_count, tx->tx_rate,
576 __le16_to_cpu(tx->tx_control), jiffies);
577
578 fc = __le16_to_cpu(tx->frame_control);
579 printk(KERN_DEBUG " FC=0x%04x (type=%d:%d) dur=0x%04x seq=0x%04x "
580 "data_len=%d%s%s\n",
581 fc, WLAN_FC_GET_TYPE(fc) >> 2, WLAN_FC_GET_STYPE(fc) >> 4,
582 __le16_to_cpu(tx->duration_id), __le16_to_cpu(tx->seq_ctrl),
583 __le16_to_cpu(tx->data_len),
584 fc & IEEE80211_FCTL_TODS ? " [ToDS]" : "",
585 fc & IEEE80211_FCTL_FROMDS ? " [FromDS]" : "");
586
587 printk(KERN_DEBUG " A1=%s A2=%s A3=%s A4=%s\n",
588 print_mac(mac, tx->addr1), print_mac(mac2, tx->addr2),
589 print_mac(mac3, tx->addr3), print_mac(mac4, tx->addr4));
590
591 printk(KERN_DEBUG " dst=%s src=%s len=%d\n",
592 print_mac(mac, tx->dst_addr), print_mac(mac2, tx->src_addr),
593 __be16_to_cpu(tx->len));
594 }
595
596
597 int hostap_80211_header_parse(const struct sk_buff *skb, unsigned char *haddr)
598 {
599 struct hostap_interface *iface = netdev_priv(skb->dev);
600 local_info_t *local = iface->local;
601
602 if (local->monitor_type == PRISM2_MONITOR_PRISM ||
603 local->monitor_type == PRISM2_MONITOR_CAPHDR) {
604 const unsigned char *mac = skb_mac_header(skb);
605
606 if (*(u32 *)mac == LWNG_CAP_DID_BASE) {
607 memcpy(haddr,
608 mac + sizeof(struct linux_wlan_ng_prism_hdr) + 10,
609 ETH_ALEN); /* addr2 */
610 } else { /* (*(u32 *)mac == htonl(LWNG_CAPHDR_VERSION)) */
611 memcpy(haddr,
612 mac + sizeof(struct linux_wlan_ng_cap_hdr) + 10,
613 ETH_ALEN); /* addr2 */
614 }
615 } else
616 memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
617
618 return ETH_ALEN;
619 }
620
621
622 int hostap_80211_get_hdrlen(u16 fc)
623 {
624 int hdrlen = 24;
625
626 switch (WLAN_FC_GET_TYPE(fc)) {
627 case IEEE80211_FTYPE_DATA:
628 if ((fc & IEEE80211_FCTL_FROMDS) && (fc & IEEE80211_FCTL_TODS))
629 hdrlen = 30; /* Addr4 */
630 break;
631 case IEEE80211_FTYPE_CTL:
632 switch (WLAN_FC_GET_STYPE(fc)) {
633 case IEEE80211_STYPE_CTS:
634 case IEEE80211_STYPE_ACK:
635 hdrlen = 10;
636 break;
637 default:
638 hdrlen = 16;
639 break;
640 }
641 break;
642 }
643
644 return hdrlen;
645 }
646
647
648 struct net_device_stats *hostap_get_stats(struct net_device *dev)
649 {
650 struct hostap_interface *iface;
651 iface = netdev_priv(dev);
652 return &iface->stats;
653 }
654
655
656 static int prism2_close(struct net_device *dev)
657 {
658 struct hostap_interface *iface;
659 local_info_t *local;
660
661 PDEBUG(DEBUG_FLOW, "%s: prism2_close\n", dev->name);
662
663 iface = netdev_priv(dev);
664 local = iface->local;
665
666 if (dev == local->ddev) {
667 prism2_sta_deauth(local, WLAN_REASON_DEAUTH_LEAVING);
668 }
669 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
670 if (!local->hostapd && dev == local->dev &&
671 (!local->func->card_present || local->func->card_present(local)) &&
672 local->hw_ready && local->ap && local->iw_mode == IW_MODE_MASTER)
673 hostap_deauth_all_stas(dev, local->ap, 1);
674 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
675
676 if (dev == local->dev) {
677 local->func->hw_shutdown(dev, HOSTAP_HW_ENABLE_CMDCOMPL);
678 }
679
680 if (netif_running(dev)) {
681 netif_stop_queue(dev);
682 netif_device_detach(dev);
683 }
684
685 flush_scheduled_work();
686
687 module_put(local->hw_module);
688
689 local->num_dev_open--;
690
691 if (dev != local->dev && local->dev->flags & IFF_UP &&
692 local->master_dev_auto_open && local->num_dev_open == 1) {
693 /* Close master radio interface automatically if it was also
694 * opened automatically and we are now closing the last
695 * remaining non-master device. */
696 dev_close(local->dev);
697 }
698
699 return 0;
700 }
701
702
703 static int prism2_open(struct net_device *dev)
704 {
705 struct hostap_interface *iface;
706 local_info_t *local;
707
708 PDEBUG(DEBUG_FLOW, "%s: prism2_open\n", dev->name);
709
710 iface = netdev_priv(dev);
711 local = iface->local;
712
713 if (local->no_pri) {
714 printk(KERN_DEBUG "%s: could not set interface UP - no PRI "
715 "f/w\n", dev->name);
716 return 1;
717 }
718
719 if ((local->func->card_present && !local->func->card_present(local)) ||
720 local->hw_downloading)
721 return -ENODEV;
722
723 if (!try_module_get(local->hw_module))
724 return -ENODEV;
725 local->num_dev_open++;
726
727 if (!local->dev_enabled && local->func->hw_enable(dev, 1)) {
728 printk(KERN_WARNING "%s: could not enable MAC port\n",
729 dev->name);
730 prism2_close(dev);
731 return 1;
732 }
733 if (!local->dev_enabled)
734 prism2_callback(local, PRISM2_CALLBACK_ENABLE);
735 local->dev_enabled = 1;
736
737 if (dev != local->dev && !(local->dev->flags & IFF_UP)) {
738 /* Master radio interface is needed for all operation, so open
739 * it automatically when any virtual net_device is opened. */
740 local->master_dev_auto_open = 1;
741 dev_open(local->dev);
742 }
743
744 netif_device_attach(dev);
745 netif_start_queue(dev);
746
747 return 0;
748 }
749
750
751 static int prism2_set_mac_address(struct net_device *dev, void *p)
752 {
753 struct hostap_interface *iface;
754 local_info_t *local;
755 struct list_head *ptr;
756 struct sockaddr *addr = p;
757
758 iface = netdev_priv(dev);
759 local = iface->local;
760
761 if (local->func->set_rid(dev, HFA384X_RID_CNFOWNMACADDR, addr->sa_data,
762 ETH_ALEN) < 0 || local->func->reset_port(dev))
763 return -EINVAL;
764
765 read_lock_bh(&local->iface_lock);
766 list_for_each(ptr, &local->hostap_interfaces) {
767 iface = list_entry(ptr, struct hostap_interface, list);
768 memcpy(iface->dev->dev_addr, addr->sa_data, ETH_ALEN);
769 }
770 memcpy(local->dev->dev_addr, addr->sa_data, ETH_ALEN);
771 read_unlock_bh(&local->iface_lock);
772
773 return 0;
774 }
775
776
777 /* TODO: to be further implemented as soon as Prism2 fully supports
778 * GroupAddresses and correct documentation is available */
779 void hostap_set_multicast_list_queue(struct work_struct *work)
780 {
781 local_info_t *local =
782 container_of(work, local_info_t, set_multicast_list_queue);
783 struct net_device *dev = local->dev;
784 struct hostap_interface *iface;
785
786 iface = netdev_priv(dev);
787 if (hostap_set_word(dev, HFA384X_RID_PROMISCUOUSMODE,
788 local->is_promisc)) {
789 printk(KERN_INFO "%s: %sabling promiscuous mode failed\n",
790 dev->name, local->is_promisc ? "en" : "dis");
791 }
792 }
793
794
795 static void hostap_set_multicast_list(struct net_device *dev)
796 {
797 #if 0
798 /* FIX: promiscuous mode seems to be causing a lot of problems with
799 * some station firmware versions (FCSErr frames, invalid MACPort, etc.
800 * corrupted incoming frames). This code is now commented out while the
801 * problems are investigated. */
802 struct hostap_interface *iface;
803 local_info_t *local;
804
805 iface = netdev_priv(dev);
806 local = iface->local;
807 if ((dev->flags & IFF_ALLMULTI) || (dev->flags & IFF_PROMISC)) {
808 local->is_promisc = 1;
809 } else {
810 local->is_promisc = 0;
811 }
812
813 schedule_work(&local->set_multicast_list_queue);
814 #endif
815 }
816
817
818 static int prism2_change_mtu(struct net_device *dev, int new_mtu)
819 {
820 if (new_mtu < PRISM2_MIN_MTU || new_mtu > PRISM2_MAX_MTU)
821 return -EINVAL;
822
823 dev->mtu = new_mtu;
824 return 0;
825 }
826
827
828 static void prism2_tx_timeout(struct net_device *dev)
829 {
830 struct hostap_interface *iface;
831 local_info_t *local;
832 struct hfa384x_regs regs;
833
834 iface = netdev_priv(dev);
835 local = iface->local;
836
837 printk(KERN_WARNING "%s Tx timed out! Resetting card\n", dev->name);
838 netif_stop_queue(local->dev);
839
840 local->func->read_regs(dev, &regs);
841 printk(KERN_DEBUG "%s: CMD=%04x EVSTAT=%04x "
842 "OFFSET0=%04x OFFSET1=%04x SWSUPPORT0=%04x\n",
843 dev->name, regs.cmd, regs.evstat, regs.offset0, regs.offset1,
844 regs.swsupport0);
845
846 local->func->schedule_reset(local);
847 }
848
849 const struct header_ops hostap_80211_ops = {
850 .create = eth_header,
851 .rebuild = eth_rebuild_header,
852 .cache = eth_header_cache,
853 .cache_update = eth_header_cache_update,
854
855 .parse = hostap_80211_header_parse,
856 };
857 EXPORT_SYMBOL(hostap_80211_ops);
858
859 void hostap_setup_dev(struct net_device *dev, local_info_t *local,
860 int type)
861 {
862 struct hostap_interface *iface;
863
864 iface = netdev_priv(dev);
865 ether_setup(dev);
866
867 /* kernel callbacks */
868 dev->get_stats = hostap_get_stats;
869 if (iface) {
870 /* Currently, we point to the proper spy_data only on
871 * the main_dev. This could be fixed. Jean II */
872 iface->wireless_data.spy_data = &iface->spy_data;
873 dev->wireless_data = &iface->wireless_data;
874 }
875 dev->wireless_handlers =
876 (struct iw_handler_def *) &hostap_iw_handler_def;
877 dev->do_ioctl = hostap_ioctl;
878 dev->open = prism2_open;
879 dev->stop = prism2_close;
880 dev->set_mac_address = prism2_set_mac_address;
881 dev->set_multicast_list = hostap_set_multicast_list;
882 dev->change_mtu = prism2_change_mtu;
883 dev->tx_timeout = prism2_tx_timeout;
884 dev->watchdog_timeo = TX_TIMEOUT;
885
886 if (type == HOSTAP_INTERFACE_AP) {
887 dev->hard_start_xmit = hostap_mgmt_start_xmit;
888 dev->type = ARPHRD_IEEE80211;
889 dev->header_ops = &hostap_80211_ops;
890 } else {
891 dev->hard_start_xmit = hostap_data_start_xmit;
892 }
893
894 dev->mtu = local->mtu;
895 if (type != HOSTAP_INTERFACE_MASTER) {
896 /* use main radio device queue */
897 dev->tx_queue_len = 0;
898 }
899
900 SET_ETHTOOL_OPS(dev, &prism2_ethtool_ops);
901
902 netif_stop_queue(dev);
903 }
904
905 static int hostap_enable_hostapd(local_info_t *local, int rtnl_locked)
906 {
907 struct net_device *dev = local->dev;
908
909 if (local->apdev)
910 return -EEXIST;
911
912 printk(KERN_DEBUG "%s: enabling hostapd mode\n", dev->name);
913
914 local->apdev = hostap_add_interface(local, HOSTAP_INTERFACE_AP,
915 rtnl_locked, local->ddev->name,
916 "ap");
917 if (local->apdev == NULL)
918 return -ENOMEM;
919
920 return 0;
921 }
922
923
924 static int hostap_disable_hostapd(local_info_t *local, int rtnl_locked)
925 {
926 struct net_device *dev = local->dev;
927
928 printk(KERN_DEBUG "%s: disabling hostapd mode\n", dev->name);
929
930 hostap_remove_interface(local->apdev, rtnl_locked, 1);
931 local->apdev = NULL;
932
933 return 0;
934 }
935
936
937 static int hostap_enable_hostapd_sta(local_info_t *local, int rtnl_locked)
938 {
939 struct net_device *dev = local->dev;
940
941 if (local->stadev)
942 return -EEXIST;
943
944 printk(KERN_DEBUG "%s: enabling hostapd STA mode\n", dev->name);
945
946 local->stadev = hostap_add_interface(local, HOSTAP_INTERFACE_STA,
947 rtnl_locked, local->ddev->name,
948 "sta");
949 if (local->stadev == NULL)
950 return -ENOMEM;
951
952 return 0;
953 }
954
955
956 static int hostap_disable_hostapd_sta(local_info_t *local, int rtnl_locked)
957 {
958 struct net_device *dev = local->dev;
959
960 printk(KERN_DEBUG "%s: disabling hostapd mode\n", dev->name);
961
962 hostap_remove_interface(local->stadev, rtnl_locked, 1);
963 local->stadev = NULL;
964
965 return 0;
966 }
967
968
969 int hostap_set_hostapd(local_info_t *local, int val, int rtnl_locked)
970 {
971 int ret;
972
973 if (val < 0 || val > 1)
974 return -EINVAL;
975
976 if (local->hostapd == val)
977 return 0;
978
979 if (val) {
980 ret = hostap_enable_hostapd(local, rtnl_locked);
981 if (ret == 0)
982 local->hostapd = 1;
983 } else {
984 local->hostapd = 0;
985 ret = hostap_disable_hostapd(local, rtnl_locked);
986 if (ret != 0)
987 local->hostapd = 1;
988 }
989
990 return ret;
991 }
992
993
994 int hostap_set_hostapd_sta(local_info_t *local, int val, int rtnl_locked)
995 {
996 int ret;
997
998 if (val < 0 || val > 1)
999 return -EINVAL;
1000
1001 if (local->hostapd_sta == val)
1002 return 0;
1003
1004 if (val) {
1005 ret = hostap_enable_hostapd_sta(local, rtnl_locked);
1006 if (ret == 0)
1007 local->hostapd_sta = 1;
1008 } else {
1009 local->hostapd_sta = 0;
1010 ret = hostap_disable_hostapd_sta(local, rtnl_locked);
1011 if (ret != 0)
1012 local->hostapd_sta = 1;
1013 }
1014
1015
1016 return ret;
1017 }
1018
1019
1020 int prism2_update_comms_qual(struct net_device *dev)
1021 {
1022 struct hostap_interface *iface;
1023 local_info_t *local;
1024 int ret = 0;
1025 struct hfa384x_comms_quality sq;
1026
1027 iface = netdev_priv(dev);
1028 local = iface->local;
1029 if (!local->sta_fw_ver)
1030 ret = -1;
1031 else if (local->sta_fw_ver >= PRISM2_FW_VER(1,3,1)) {
1032 if (local->func->get_rid(local->dev,
1033 HFA384X_RID_DBMCOMMSQUALITY,
1034 &sq, sizeof(sq), 1) >= 0) {
1035 local->comms_qual = (s16) le16_to_cpu(sq.comm_qual);
1036 local->avg_signal = (s16) le16_to_cpu(sq.signal_level);
1037 local->avg_noise = (s16) le16_to_cpu(sq.noise_level);
1038 local->last_comms_qual_update = jiffies;
1039 } else
1040 ret = -1;
1041 } else {
1042 if (local->func->get_rid(local->dev, HFA384X_RID_COMMSQUALITY,
1043 &sq, sizeof(sq), 1) >= 0) {
1044 local->comms_qual = le16_to_cpu(sq.comm_qual);
1045 local->avg_signal = HFA384X_LEVEL_TO_dBm(
1046 le16_to_cpu(sq.signal_level));
1047 local->avg_noise = HFA384X_LEVEL_TO_dBm(
1048 le16_to_cpu(sq.noise_level));
1049 local->last_comms_qual_update = jiffies;
1050 } else
1051 ret = -1;
1052 }
1053
1054 return ret;
1055 }
1056
1057
1058 int prism2_sta_send_mgmt(local_info_t *local, u8 *dst, u16 stype,
1059 u8 *body, size_t bodylen)
1060 {
1061 struct sk_buff *skb;
1062 struct hostap_ieee80211_mgmt *mgmt;
1063 struct hostap_skb_tx_data *meta;
1064 struct net_device *dev = local->dev;
1065
1066 skb = dev_alloc_skb(IEEE80211_MGMT_HDR_LEN + bodylen);
1067 if (skb == NULL)
1068 return -ENOMEM;
1069
1070 mgmt = (struct hostap_ieee80211_mgmt *)
1071 skb_put(skb, IEEE80211_MGMT_HDR_LEN);
1072 memset(mgmt, 0, IEEE80211_MGMT_HDR_LEN);
1073 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1074 memcpy(mgmt->da, dst, ETH_ALEN);
1075 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1076 memcpy(mgmt->bssid, dst, ETH_ALEN);
1077 if (body)
1078 memcpy(skb_put(skb, bodylen), body, bodylen);
1079
1080 meta = (struct hostap_skb_tx_data *) skb->cb;
1081 memset(meta, 0, sizeof(*meta));
1082 meta->magic = HOSTAP_SKB_TX_DATA_MAGIC;
1083 meta->iface = netdev_priv(dev);
1084
1085 skb->dev = dev;
1086 skb_reset_mac_header(skb);
1087 skb_reset_network_header(skb);
1088 dev_queue_xmit(skb);
1089
1090 return 0;
1091 }
1092
1093
1094 int prism2_sta_deauth(local_info_t *local, u16 reason)
1095 {
1096 union iwreq_data wrqu;
1097 int ret;
1098
1099 if (local->iw_mode != IW_MODE_INFRA ||
1100 memcmp(local->bssid, "\x00\x00\x00\x00\x00\x00", ETH_ALEN) == 0 ||
1101 memcmp(local->bssid, "\x44\x44\x44\x44\x44\x44", ETH_ALEN) == 0)
1102 return 0;
1103
1104 reason = cpu_to_le16(reason);
1105 ret = prism2_sta_send_mgmt(local, local->bssid, IEEE80211_STYPE_DEAUTH,
1106 (u8 *) &reason, 2);
1107 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
1108 wireless_send_event(local->dev, SIOCGIWAP, &wrqu, NULL);
1109 return ret;
1110 }
1111
1112
1113 struct proc_dir_entry *hostap_proc;
1114
1115 static int __init hostap_init(void)
1116 {
1117 if (init_net.proc_net != NULL) {
1118 hostap_proc = proc_mkdir("hostap", init_net.proc_net);
1119 if (!hostap_proc)
1120 printk(KERN_WARNING "Failed to mkdir "
1121 "/proc/net/hostap\n");
1122 } else
1123 hostap_proc = NULL;
1124
1125 return 0;
1126 }
1127
1128
1129 static void __exit hostap_exit(void)
1130 {
1131 if (hostap_proc != NULL) {
1132 hostap_proc = NULL;
1133 remove_proc_entry("hostap", init_net.proc_net);
1134 }
1135 }
1136
1137
1138 EXPORT_SYMBOL(hostap_set_word);
1139 EXPORT_SYMBOL(hostap_set_string);
1140 EXPORT_SYMBOL(hostap_get_porttype);
1141 EXPORT_SYMBOL(hostap_set_encryption);
1142 EXPORT_SYMBOL(hostap_set_antsel);
1143 EXPORT_SYMBOL(hostap_set_roaming);
1144 EXPORT_SYMBOL(hostap_set_auth_algs);
1145 EXPORT_SYMBOL(hostap_dump_rx_header);
1146 EXPORT_SYMBOL(hostap_dump_tx_header);
1147 EXPORT_SYMBOL(hostap_80211_header_parse);
1148 EXPORT_SYMBOL(hostap_80211_get_hdrlen);
1149 EXPORT_SYMBOL(hostap_get_stats);
1150 EXPORT_SYMBOL(hostap_setup_dev);
1151 EXPORT_SYMBOL(hostap_set_multicast_list_queue);
1152 EXPORT_SYMBOL(hostap_set_hostapd);
1153 EXPORT_SYMBOL(hostap_set_hostapd_sta);
1154 EXPORT_SYMBOL(hostap_add_interface);
1155 EXPORT_SYMBOL(hostap_remove_interface);
1156 EXPORT_SYMBOL(prism2_update_comms_qual);
1157
1158 module_init(hostap_init);
1159 module_exit(hostap_exit);
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