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Add HostAP wireless driver.
[deliverable/linux.git] / drivers / net / wireless / hostap / hostap.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 * <jkmaline@cc.hut.fi>
7 * Copyright (c) 2002-2004, Jouni Malinen <jkmaline@cc.hut.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 #ifndef EXPORT_SYMTAB
16 #define EXPORT_SYMTAB
17 #endif
18
19 #include <linux/config.h>
20 #include <linux/version.h>
21 #include <linux/module.h>
22 #include <linux/init.h>
23 #include <linux/slab.h>
24 #include <linux/proc_fs.h>
25 #include <linux/if_arp.h>
26 #include <linux/delay.h>
27 #include <linux/random.h>
28 #include <linux/workqueue.h>
29 #include <linux/kmod.h>
30 #include <linux/rtnetlink.h>
31 #include <linux/wireless.h>
32 #include <net/iw_handler.h>
33 #include <asm/uaccess.h>
34
35 #include "hostap_wlan.h"
36 #include "hostap_80211.h"
37 #include "hostap_ap.h"
38 #include "hostap.h"
39 #include "hostap_crypt.h"
40
41 MODULE_AUTHOR("Jouni Malinen");
42 MODULE_DESCRIPTION("Host AP common routines");
43 MODULE_LICENSE("GPL");
44
45 /* Old hostap_crypt module is now part of hostap module. */
46 #include "hostap_crypt.c"
47
48 #define TX_TIMEOUT (2 * HZ)
49
50 #define PRISM2_MAX_FRAME_SIZE 2304
51 #define PRISM2_MIN_MTU 256
52 /* FIX: */
53 #define PRISM2_MAX_MTU (PRISM2_MAX_FRAME_SIZE - (6 /* LLC */ + 8 /* WEP */))
54
55
56 /* hostap.c */
57 static int prism2_wds_add(local_info_t *local, u8 *remote_addr,
58 int rtnl_locked);
59 static int prism2_wds_del(local_info_t *local, u8 *remote_addr,
60 int rtnl_locked, int do_not_remove);
61
62 /* hostap_ap.c */
63 static int prism2_ap_get_sta_qual(local_info_t *local, struct sockaddr addr[],
64 struct iw_quality qual[], int buf_size,
65 int aplist);
66 static int prism2_ap_translate_scan(struct net_device *dev, char *buffer);
67 static int prism2_hostapd(struct ap_data *ap,
68 struct prism2_hostapd_param *param);
69 static void * ap_crypt_get_ptrs(struct ap_data *ap, u8 *addr, int permanent,
70 struct prism2_crypt_data ***crypt);
71 static void ap_control_kickall(struct ap_data *ap);
72 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
73 static int ap_control_add_mac(struct mac_restrictions *mac_restrictions,
74 u8 *mac);
75 static int ap_control_del_mac(struct mac_restrictions *mac_restrictions,
76 u8 *mac);
77 static void ap_control_flush_macs(struct mac_restrictions *mac_restrictions);
78 static int ap_control_kick_mac(struct ap_data *ap, struct net_device *dev,
79 u8 *mac);
80 #endif /* !PRISM2_NO_KERNEL_IEEE80211_MGMT */
81
82
83 static const long freq_list[] = { 2412, 2417, 2422, 2427, 2432, 2437, 2442,
84 2447, 2452, 2457, 2462, 2467, 2472, 2484 };
85 #define FREQ_COUNT (sizeof(freq_list) / sizeof(freq_list[0]))
86
87
88 /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
89 /* Ethernet-II snap header (RFC1042 for most EtherTypes) */
90 static unsigned char rfc1042_header[] =
91 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
92 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
93 static unsigned char bridge_tunnel_header[] =
94 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
95 /* No encapsulation header if EtherType < 0x600 (=length) */
96
97
98 /* FIX: these could be compiled separately and linked together to hostap.o */
99 #include "hostap_ap.c"
100 #include "hostap_info.c"
101 #include "hostap_ioctl.c"
102 #include "hostap_proc.c"
103 #include "hostap_80211_rx.c"
104 #include "hostap_80211_tx.c"
105
106
107 struct net_device * hostap_add_interface(struct local_info *local,
108 int type, int rtnl_locked,
109 const char *prefix,
110 const char *name)
111 {
112 struct net_device *dev, *mdev;
113 struct hostap_interface *iface;
114 int ret;
115
116 dev = alloc_etherdev(sizeof(struct hostap_interface));
117 if (dev == NULL)
118 return NULL;
119
120 iface = netdev_priv(dev);
121 iface->dev = dev;
122 iface->local = local;
123 iface->type = type;
124 list_add(&iface->list, &local->hostap_interfaces);
125
126 mdev = local->dev;
127 memcpy(dev->dev_addr, mdev->dev_addr, ETH_ALEN);
128 dev->base_addr = mdev->base_addr;
129 dev->irq = mdev->irq;
130 dev->mem_start = mdev->mem_start;
131 dev->mem_end = mdev->mem_end;
132
133 hostap_setup_dev(dev, local, 0);
134 dev->destructor = free_netdev;
135
136 sprintf(dev->name, "%s%s", prefix, name);
137 if (!rtnl_locked)
138 rtnl_lock();
139
140 ret = 0;
141 if (strchr(dev->name, '%'))
142 ret = dev_alloc_name(dev, dev->name);
143
144 if (ret >= 0)
145 ret = register_netdevice(dev);
146
147 if (!rtnl_locked)
148 rtnl_unlock();
149
150 if (ret < 0) {
151 printk(KERN_WARNING "%s: failed to add new netdevice!\n",
152 dev->name);
153 free_netdev(dev);
154 return NULL;
155 }
156
157 printk(KERN_DEBUG "%s: registered netdevice %s\n",
158 mdev->name, dev->name);
159
160 return dev;
161 }
162
163
164 void hostap_remove_interface(struct net_device *dev, int rtnl_locked,
165 int remove_from_list)
166 {
167 struct hostap_interface *iface;
168
169 if (!dev)
170 return;
171
172 iface = netdev_priv(dev);
173
174 if (remove_from_list) {
175 list_del(&iface->list);
176 }
177
178 if (dev == iface->local->ddev)
179 iface->local->ddev = NULL;
180 else if (dev == iface->local->apdev)
181 iface->local->apdev = NULL;
182 else if (dev == iface->local->stadev)
183 iface->local->stadev = NULL;
184
185 if (rtnl_locked)
186 unregister_netdevice(dev);
187 else
188 unregister_netdev(dev);
189
190 /* dev->destructor = free_netdev() will free the device data, including
191 * private data, when removing the device */
192 }
193
194
195 static inline int prism2_wds_special_addr(u8 *addr)
196 {
197 if (addr[0] || addr[1] || addr[2] || addr[3] || addr[4] || addr[5])
198 return 0;
199
200 return 1;
201 }
202
203
204 static int prism2_wds_add(local_info_t *local, u8 *remote_addr,
205 int rtnl_locked)
206 {
207 struct net_device *dev;
208 struct list_head *ptr;
209 struct hostap_interface *iface, *empty, *match;
210
211 empty = match = NULL;
212 read_lock_bh(&local->iface_lock);
213 list_for_each(ptr, &local->hostap_interfaces) {
214 iface = list_entry(ptr, struct hostap_interface, list);
215 if (iface->type != HOSTAP_INTERFACE_WDS)
216 continue;
217
218 if (prism2_wds_special_addr(iface->u.wds.remote_addr))
219 empty = iface;
220 else if (memcmp(iface->u.wds.remote_addr, remote_addr,
221 ETH_ALEN) == 0) {
222 match = iface;
223 break;
224 }
225 }
226 if (!match && empty && !prism2_wds_special_addr(remote_addr)) {
227 /* take pre-allocated entry into use */
228 memcpy(empty->u.wds.remote_addr, remote_addr, ETH_ALEN);
229 read_unlock_bh(&local->iface_lock);
230 printk(KERN_DEBUG "%s: using pre-allocated WDS netdevice %s\n",
231 local->dev->name, empty->dev->name);
232 return 0;
233 }
234 read_unlock_bh(&local->iface_lock);
235
236 if (!prism2_wds_special_addr(remote_addr)) {
237 if (match)
238 return -EEXIST;
239 hostap_add_sta(local->ap, remote_addr);
240 }
241
242 if (local->wds_connections >= local->wds_max_connections)
243 return -ENOBUFS;
244
245 /* verify that there is room for wds# postfix in the interface name */
246 if (strlen(local->dev->name) > IFNAMSIZ - 5) {
247 printk(KERN_DEBUG "'%s' too long base device name\n",
248 local->dev->name);
249 return -EINVAL;
250 }
251
252 dev = hostap_add_interface(local, HOSTAP_INTERFACE_WDS, rtnl_locked,
253 local->ddev->name, "wds%d");
254 if (dev == NULL)
255 return -ENOMEM;
256
257 iface = netdev_priv(dev);
258 memcpy(iface->u.wds.remote_addr, remote_addr, ETH_ALEN);
259
260 local->wds_connections++;
261
262 return 0;
263 }
264
265
266 static int prism2_wds_del(local_info_t *local, u8 *remote_addr,
267 int rtnl_locked, int do_not_remove)
268 {
269 unsigned long flags;
270 struct list_head *ptr;
271 struct hostap_interface *iface, *selected = NULL;
272
273 write_lock_irqsave(&local->iface_lock, flags);
274 list_for_each(ptr, &local->hostap_interfaces) {
275 iface = list_entry(ptr, struct hostap_interface, list);
276 if (iface->type != HOSTAP_INTERFACE_WDS)
277 continue;
278
279 if (memcmp(iface->u.wds.remote_addr, remote_addr,
280 ETH_ALEN) == 0) {
281 selected = iface;
282 break;
283 }
284 }
285 if (selected && !do_not_remove)
286 list_del(&selected->list);
287 write_unlock_irqrestore(&local->iface_lock, flags);
288
289 if (selected) {
290 if (do_not_remove)
291 memset(selected->u.wds.remote_addr, 0, ETH_ALEN);
292 else {
293 hostap_remove_interface(selected->dev, rtnl_locked, 0);
294 local->wds_connections--;
295 }
296 }
297
298 return selected ? 0 : -ENODEV;
299 }
300
301
302 u16 hostap_tx_callback_register(local_info_t *local,
303 void (*func)(struct sk_buff *, int ok, void *),
304 void *data)
305 {
306 unsigned long flags;
307 struct hostap_tx_callback_info *entry;
308
309 entry = (struct hostap_tx_callback_info *) kmalloc(sizeof(*entry),
310 GFP_ATOMIC);
311 if (entry == NULL)
312 return 0;
313
314 entry->func = func;
315 entry->data = data;
316
317 spin_lock_irqsave(&local->lock, flags);
318 entry->idx = local->tx_callback ? local->tx_callback->idx + 1 : 1;
319 entry->next = local->tx_callback;
320 local->tx_callback = entry;
321 spin_unlock_irqrestore(&local->lock, flags);
322
323 return entry->idx;
324 }
325
326
327 int hostap_tx_callback_unregister(local_info_t *local, u16 idx)
328 {
329 unsigned long flags;
330 struct hostap_tx_callback_info *cb, *prev = NULL;
331
332 spin_lock_irqsave(&local->lock, flags);
333 cb = local->tx_callback;
334 while (cb != NULL && cb->idx != idx) {
335 prev = cb;
336 cb = cb->next;
337 }
338 if (cb) {
339 if (prev == NULL)
340 local->tx_callback = cb->next;
341 else
342 prev->next = cb->next;
343 kfree(cb);
344 }
345 spin_unlock_irqrestore(&local->lock, flags);
346
347 return cb ? 0 : -1;
348 }
349
350
351 /* val is in host byte order */
352 int hostap_set_word(struct net_device *dev, int rid, u16 val)
353 {
354 struct hostap_interface *iface;
355 u16 tmp = cpu_to_le16(val);
356 iface = netdev_priv(dev);
357 return iface->local->func->set_rid(dev, rid, &tmp, 2);
358 }
359
360
361 int hostap_set_string(struct net_device *dev, int rid, const char *val)
362 {
363 struct hostap_interface *iface;
364 char buf[MAX_SSID_LEN + 2];
365 int len;
366
367 iface = netdev_priv(dev);
368 len = strlen(val);
369 if (len > MAX_SSID_LEN)
370 return -1;
371 memset(buf, 0, sizeof(buf));
372 buf[0] = len; /* little endian 16 bit word */
373 memcpy(buf + 2, val, len);
374
375 return iface->local->func->set_rid(dev, rid, &buf, MAX_SSID_LEN + 2);
376 }
377
378
379 u16 hostap_get_porttype(local_info_t *local)
380 {
381 if (local->iw_mode == IW_MODE_ADHOC && local->pseudo_adhoc)
382 return HFA384X_PORTTYPE_PSEUDO_IBSS;
383 if (local->iw_mode == IW_MODE_ADHOC)
384 return HFA384X_PORTTYPE_IBSS;
385 if (local->iw_mode == IW_MODE_INFRA)
386 return HFA384X_PORTTYPE_BSS;
387 if (local->iw_mode == IW_MODE_REPEAT)
388 return HFA384X_PORTTYPE_WDS;
389 if (local->iw_mode == IW_MODE_MONITOR)
390 return HFA384X_PORTTYPE_PSEUDO_IBSS;
391 return HFA384X_PORTTYPE_HOSTAP;
392 }
393
394
395 int hostap_set_encryption(local_info_t *local)
396 {
397 u16 val, old_val;
398 int i, keylen, len, idx;
399 char keybuf[WEP_KEY_LEN + 1];
400 enum { NONE, WEP, OTHER } encrypt_type;
401
402 idx = local->tx_keyidx;
403 if (local->crypt[idx] == NULL || local->crypt[idx]->ops == NULL)
404 encrypt_type = NONE;
405 else if (strcmp(local->crypt[idx]->ops->name, "WEP") == 0)
406 encrypt_type = WEP;
407 else
408 encrypt_type = OTHER;
409
410 if (local->func->get_rid(local->dev, HFA384X_RID_CNFWEPFLAGS, &val, 2,
411 1) < 0) {
412 printk(KERN_DEBUG "Could not read current WEP flags.\n");
413 goto fail;
414 }
415 le16_to_cpus(&val);
416 old_val = val;
417
418 if (encrypt_type != NONE || local->privacy_invoked)
419 val |= HFA384X_WEPFLAGS_PRIVACYINVOKED;
420 else
421 val &= ~HFA384X_WEPFLAGS_PRIVACYINVOKED;
422
423 if (local->open_wep || encrypt_type == NONE ||
424 ((local->ieee_802_1x || local->wpa) && local->host_decrypt))
425 val &= ~HFA384X_WEPFLAGS_EXCLUDEUNENCRYPTED;
426 else
427 val |= HFA384X_WEPFLAGS_EXCLUDEUNENCRYPTED;
428
429 if ((encrypt_type != NONE || local->privacy_invoked) &&
430 (encrypt_type == OTHER || local->host_encrypt))
431 val |= HFA384X_WEPFLAGS_HOSTENCRYPT;
432 else
433 val &= ~HFA384X_WEPFLAGS_HOSTENCRYPT;
434 if ((encrypt_type != NONE || local->privacy_invoked) &&
435 (encrypt_type == OTHER || local->host_decrypt))
436 val |= HFA384X_WEPFLAGS_HOSTDECRYPT;
437 else
438 val &= ~HFA384X_WEPFLAGS_HOSTDECRYPT;
439
440 if (val != old_val &&
441 hostap_set_word(local->dev, HFA384X_RID_CNFWEPFLAGS, val)) {
442 printk(KERN_DEBUG "Could not write new WEP flags (0x%x)\n",
443 val);
444 goto fail;
445 }
446
447 if (encrypt_type != WEP)
448 return 0;
449
450 /* 104-bit support seems to require that all the keys are set to the
451 * same keylen */
452 keylen = 6; /* first 5 octets */
453 len = local->crypt[idx]->ops->get_key(keybuf, sizeof(keybuf),
454 NULL, local->crypt[idx]->priv);
455 if (idx >= 0 && idx < WEP_KEYS && len > 5)
456 keylen = WEP_KEY_LEN + 1; /* first 13 octets */
457
458 for (i = 0; i < WEP_KEYS; i++) {
459 memset(keybuf, 0, sizeof(keybuf));
460 if (local->crypt[i]) {
461 (void) local->crypt[i]->ops->get_key(
462 keybuf, sizeof(keybuf),
463 NULL, local->crypt[i]->priv);
464 }
465 if (local->func->set_rid(local->dev,
466 HFA384X_RID_CNFDEFAULTKEY0 + i,
467 keybuf, keylen)) {
468 printk(KERN_DEBUG "Could not set key %d (len=%d)\n",
469 i, keylen);
470 goto fail;
471 }
472 }
473 if (hostap_set_word(local->dev, HFA384X_RID_CNFWEPDEFAULTKEYID, idx)) {
474 printk(KERN_DEBUG "Could not set default keyid %d\n", idx);
475 goto fail;
476 }
477
478 return 0;
479
480 fail:
481 printk(KERN_DEBUG "%s: encryption setup failed\n", local->dev->name);
482 return -1;
483 }
484
485
486 int hostap_set_antsel(local_info_t *local)
487 {
488 u16 val;
489 int ret = 0;
490
491 if (local->antsel_tx != HOSTAP_ANTSEL_DO_NOT_TOUCH &&
492 local->func->cmd(local->dev, HFA384X_CMDCODE_READMIF,
493 HFA386X_CR_TX_CONFIGURE,
494 NULL, &val) == 0) {
495 val &= ~(BIT(2) | BIT(1));
496 switch (local->antsel_tx) {
497 case HOSTAP_ANTSEL_DIVERSITY:
498 val |= BIT(1);
499 break;
500 case HOSTAP_ANTSEL_LOW:
501 break;
502 case HOSTAP_ANTSEL_HIGH:
503 val |= BIT(2);
504 break;
505 }
506
507 if (local->func->cmd(local->dev, HFA384X_CMDCODE_WRITEMIF,
508 HFA386X_CR_TX_CONFIGURE, &val, NULL)) {
509 printk(KERN_INFO "%s: setting TX AntSel failed\n",
510 local->dev->name);
511 ret = -1;
512 }
513 }
514
515 if (local->antsel_rx != HOSTAP_ANTSEL_DO_NOT_TOUCH &&
516 local->func->cmd(local->dev, HFA384X_CMDCODE_READMIF,
517 HFA386X_CR_RX_CONFIGURE,
518 NULL, &val) == 0) {
519 val &= ~(BIT(1) | BIT(0));
520 switch (local->antsel_rx) {
521 case HOSTAP_ANTSEL_DIVERSITY:
522 break;
523 case HOSTAP_ANTSEL_LOW:
524 val |= BIT(0);
525 break;
526 case HOSTAP_ANTSEL_HIGH:
527 val |= BIT(0) | BIT(1);
528 break;
529 }
530
531 if (local->func->cmd(local->dev, HFA384X_CMDCODE_WRITEMIF,
532 HFA386X_CR_RX_CONFIGURE, &val, NULL)) {
533 printk(KERN_INFO "%s: setting RX AntSel failed\n",
534 local->dev->name);
535 ret = -1;
536 }
537 }
538
539 return ret;
540 }
541
542
543 int hostap_set_roaming(local_info_t *local)
544 {
545 u16 val;
546
547 switch (local->host_roaming) {
548 case 1:
549 val = HFA384X_ROAMING_HOST;
550 break;
551 case 2:
552 val = HFA384X_ROAMING_DISABLED;
553 break;
554 case 0:
555 default:
556 val = HFA384X_ROAMING_FIRMWARE;
557 break;
558 }
559
560 return hostap_set_word(local->dev, HFA384X_RID_CNFROAMINGMODE, val);
561 }
562
563
564 int hostap_set_auth_algs(local_info_t *local)
565 {
566 int val = local->auth_algs;
567 /* At least STA f/w v0.6.2 seems to have issues with cnfAuthentication
568 * set to include both Open and Shared Key flags. It tries to use
569 * Shared Key authentication in that case even if WEP keys are not
570 * configured.. STA f/w v0.7.6 is able to handle such configuration,
571 * but it is unknown when this was fixed between 0.6.2 .. 0.7.6. */
572 if (local->sta_fw_ver < PRISM2_FW_VER(0,7,0) &&
573 val != PRISM2_AUTH_OPEN && val != PRISM2_AUTH_SHARED_KEY)
574 val = PRISM2_AUTH_OPEN;
575
576 if (hostap_set_word(local->dev, HFA384X_RID_CNFAUTHENTICATION, val)) {
577 printk(KERN_INFO "%s: cnfAuthentication setting to 0x%x "
578 "failed\n", local->dev->name, local->auth_algs);
579 return -EINVAL;
580 }
581
582 return 0;
583 }
584
585
586 void hostap_dump_rx_header(const char *name, const struct hfa384x_rx_frame *rx)
587 {
588 u16 status, fc;
589
590 status = __le16_to_cpu(rx->status);
591
592 printk(KERN_DEBUG "%s: RX status=0x%04x (port=%d, type=%d, "
593 "fcserr=%d) silence=%d signal=%d rate=%d rxflow=%d; "
594 "jiffies=%ld\n",
595 name, status, (status >> 8) & 0x07, status >> 13, status & 1,
596 rx->silence, rx->signal, rx->rate, rx->rxflow, jiffies);
597
598 fc = __le16_to_cpu(rx->frame_control);
599 printk(KERN_DEBUG " FC=0x%04x (type=%d:%d) dur=0x%04x seq=0x%04x "
600 "data_len=%d%s%s\n",
601 fc, WLAN_FC_GET_TYPE(fc), WLAN_FC_GET_STYPE(fc),
602 __le16_to_cpu(rx->duration_id), __le16_to_cpu(rx->seq_ctrl),
603 __le16_to_cpu(rx->data_len),
604 fc & WLAN_FC_TODS ? " [ToDS]" : "",
605 fc & WLAN_FC_FROMDS ? " [FromDS]" : "");
606
607 printk(KERN_DEBUG " A1=" MACSTR " A2=" MACSTR " A3=" MACSTR " A4="
608 MACSTR "\n",
609 MAC2STR(rx->addr1), MAC2STR(rx->addr2), MAC2STR(rx->addr3),
610 MAC2STR(rx->addr4));
611
612 printk(KERN_DEBUG " dst=" MACSTR " src=" MACSTR " len=%d\n",
613 MAC2STR(rx->dst_addr), MAC2STR(rx->src_addr),
614 __be16_to_cpu(rx->len));
615 }
616
617
618 void hostap_dump_tx_header(const char *name, const struct hfa384x_tx_frame *tx)
619 {
620 u16 fc;
621
622 printk(KERN_DEBUG "%s: TX status=0x%04x retry_count=%d tx_rate=%d "
623 "tx_control=0x%04x; jiffies=%ld\n",
624 name, __le16_to_cpu(tx->status), tx->retry_count, tx->tx_rate,
625 __le16_to_cpu(tx->tx_control), jiffies);
626
627 fc = __le16_to_cpu(tx->frame_control);
628 printk(KERN_DEBUG " FC=0x%04x (type=%d:%d) dur=0x%04x seq=0x%04x "
629 "data_len=%d%s%s\n",
630 fc, WLAN_FC_GET_TYPE(fc), WLAN_FC_GET_STYPE(fc),
631 __le16_to_cpu(tx->duration_id), __le16_to_cpu(tx->seq_ctrl),
632 __le16_to_cpu(tx->data_len),
633 fc & WLAN_FC_TODS ? " [ToDS]" : "",
634 fc & WLAN_FC_FROMDS ? " [FromDS]" : "");
635
636 printk(KERN_DEBUG " A1=" MACSTR " A2=" MACSTR " A3=" MACSTR " A4="
637 MACSTR "\n",
638 MAC2STR(tx->addr1), MAC2STR(tx->addr2), MAC2STR(tx->addr3),
639 MAC2STR(tx->addr4));
640
641 printk(KERN_DEBUG " dst=" MACSTR " src=" MACSTR " len=%d\n",
642 MAC2STR(tx->dst_addr), MAC2STR(tx->src_addr),
643 __be16_to_cpu(tx->len));
644 }
645
646
647 int hostap_80211_header_parse(struct sk_buff *skb, unsigned char *haddr)
648 {
649 memcpy(haddr, skb->mac.raw + 10, ETH_ALEN); /* addr2 */
650 return ETH_ALEN;
651 }
652
653
654 int hostap_80211_prism_header_parse(struct sk_buff *skb, unsigned char *haddr)
655 {
656 if (*(u32 *)skb->mac.raw == LWNG_CAP_DID_BASE) {
657 memcpy(haddr, skb->mac.raw +
658 sizeof(struct linux_wlan_ng_prism_hdr) + 10,
659 ETH_ALEN); /* addr2 */
660 } else { /* (*(u32 *)skb->mac.raw == htonl(LWNG_CAPHDR_VERSION)) */
661 memcpy(haddr, skb->mac.raw +
662 sizeof(struct linux_wlan_ng_cap_hdr) + 10,
663 ETH_ALEN); /* addr2 */
664 }
665 return ETH_ALEN;
666 }
667
668
669 int hostap_80211_get_hdrlen(u16 fc)
670 {
671 int hdrlen = 24;
672
673 switch (WLAN_FC_GET_TYPE(fc)) {
674 case WLAN_FC_TYPE_DATA:
675 if ((fc & WLAN_FC_FROMDS) && (fc & WLAN_FC_TODS))
676 hdrlen = 30; /* Addr4 */
677 break;
678 case WLAN_FC_TYPE_CTRL:
679 switch (WLAN_FC_GET_STYPE(fc)) {
680 case WLAN_FC_STYPE_CTS:
681 case WLAN_FC_STYPE_ACK:
682 hdrlen = 10;
683 break;
684 default:
685 hdrlen = 16;
686 break;
687 }
688 break;
689 }
690
691 return hdrlen;
692 }
693
694
695 struct net_device_stats *hostap_get_stats(struct net_device *dev)
696 {
697 struct hostap_interface *iface;
698 iface = netdev_priv(dev);
699 return &iface->stats;
700 }
701
702
703 static int prism2_close(struct net_device *dev)
704 {
705 struct hostap_interface *iface;
706 local_info_t *local;
707
708 PDEBUG(DEBUG_FLOW, "%s: prism2_close\n", dev->name);
709
710 iface = netdev_priv(dev);
711 local = iface->local;
712
713 if (dev == local->ddev) {
714 prism2_sta_deauth(local, WLAN_REASON_DEAUTH_LEAVING);
715 }
716 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
717 if (!local->hostapd && dev == local->dev &&
718 (!local->func->card_present || local->func->card_present(local)) &&
719 local->hw_ready && local->ap && local->iw_mode == IW_MODE_MASTER)
720 hostap_deauth_all_stas(dev, local->ap, 1);
721 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
722
723 if (local->func->dev_close && local->func->dev_close(local))
724 return 0;
725
726 if (dev == local->dev) {
727 local->func->hw_shutdown(dev, HOSTAP_HW_ENABLE_CMDCOMPL);
728 }
729
730 if (netif_running(dev)) {
731 netif_stop_queue(dev);
732 netif_device_detach(dev);
733 }
734
735 flush_scheduled_work();
736
737 module_put(local->hw_module);
738
739 local->num_dev_open--;
740
741 if (dev != local->dev && local->dev->flags & IFF_UP &&
742 local->master_dev_auto_open && local->num_dev_open == 1) {
743 /* Close master radio interface automatically if it was also
744 * opened automatically and we are now closing the last
745 * remaining non-master device. */
746 dev_close(local->dev);
747 }
748
749 return 0;
750 }
751
752
753 static int prism2_open(struct net_device *dev)
754 {
755 struct hostap_interface *iface;
756 local_info_t *local;
757
758 PDEBUG(DEBUG_FLOW, "%s: prism2_open\n", dev->name);
759
760 iface = netdev_priv(dev);
761 local = iface->local;
762
763 if (local->no_pri) {
764 printk(KERN_DEBUG "%s: could not set interface UP - no PRI "
765 "f/w\n", dev->name);
766 return 1;
767 }
768
769 if ((local->func->card_present && !local->func->card_present(local)) ||
770 local->hw_downloading)
771 return -ENODEV;
772
773 if (local->func->dev_open && local->func->dev_open(local))
774 return 1;
775
776 if (!try_module_get(local->hw_module))
777 return -ENODEV;
778 local->num_dev_open++;
779
780 if (!local->dev_enabled && local->func->hw_enable(dev, 1)) {
781 printk(KERN_WARNING "%s: could not enable MAC port\n",
782 dev->name);
783 prism2_close(dev);
784 return 1;
785 }
786 if (!local->dev_enabled)
787 prism2_callback(local, PRISM2_CALLBACK_ENABLE);
788 local->dev_enabled = 1;
789
790 if (dev != local->dev && !(local->dev->flags & IFF_UP)) {
791 /* Master radio interface is needed for all operation, so open
792 * it automatically when any virtual net_device is opened. */
793 local->master_dev_auto_open = 1;
794 dev_open(local->dev);
795 }
796
797 netif_device_attach(dev);
798 netif_start_queue(dev);
799
800 return 0;
801 }
802
803
804 static int prism2_set_mac_address(struct net_device *dev, void *p)
805 {
806 struct hostap_interface *iface;
807 local_info_t *local;
808 struct list_head *ptr;
809 struct sockaddr *addr = p;
810
811 iface = netdev_priv(dev);
812 local = iface->local;
813
814 if (local->func->set_rid(dev, HFA384X_RID_CNFOWNMACADDR, addr->sa_data,
815 ETH_ALEN) < 0 || local->func->reset_port(dev))
816 return -EINVAL;
817
818 read_lock_bh(&local->iface_lock);
819 list_for_each(ptr, &local->hostap_interfaces) {
820 iface = list_entry(ptr, struct hostap_interface, list);
821 memcpy(iface->dev->dev_addr, addr->sa_data, ETH_ALEN);
822 }
823 memcpy(local->dev->dev_addr, addr->sa_data, ETH_ALEN);
824 read_unlock_bh(&local->iface_lock);
825
826 return 0;
827 }
828
829
830 /* TODO: to be further implemented as soon as Prism2 fully supports
831 * GroupAddresses and correct documentation is available */
832 void hostap_set_multicast_list_queue(void *data)
833 {
834 struct net_device *dev = (struct net_device *) data;
835 struct hostap_interface *iface;
836 local_info_t *local;
837
838 iface = netdev_priv(dev);
839 local = iface->local;
840 if (hostap_set_word(dev, HFA384X_RID_PROMISCUOUSMODE,
841 local->is_promisc)) {
842 printk(KERN_INFO "%s: %sabling promiscuous mode failed\n",
843 dev->name, local->is_promisc ? "en" : "dis");
844 }
845 }
846
847
848 static void hostap_set_multicast_list(struct net_device *dev)
849 {
850 #if 0
851 /* FIX: promiscuous mode seems to be causing a lot of problems with
852 * some station firmware versions (FCSErr frames, invalid MACPort, etc.
853 * corrupted incoming frames). This code is now commented out while the
854 * problems are investigated. */
855 struct hostap_interface *iface;
856 local_info_t *local;
857
858 iface = netdev_priv(dev);
859 local = iface->local;
860 if ((dev->flags & IFF_ALLMULTI) || (dev->flags & IFF_PROMISC)) {
861 local->is_promisc = 1;
862 } else {
863 local->is_promisc = 0;
864 }
865
866 schedule_work(&local->set_multicast_list_queue);
867 #endif
868 }
869
870
871 static int prism2_change_mtu(struct net_device *dev, int new_mtu)
872 {
873 if (new_mtu < PRISM2_MIN_MTU || new_mtu > PRISM2_MAX_MTU)
874 return -EINVAL;
875
876 dev->mtu = new_mtu;
877 return 0;
878 }
879
880
881 static void prism2_tx_timeout(struct net_device *dev)
882 {
883 struct hostap_interface *iface;
884 local_info_t *local;
885 struct hfa384x_regs regs;
886
887 iface = netdev_priv(dev);
888 local = iface->local;
889
890 printk(KERN_WARNING "%s Tx timed out! Resetting card\n", dev->name);
891 netif_stop_queue(local->dev);
892
893 local->func->read_regs(dev, &regs);
894 printk(KERN_DEBUG "%s: CMD=%04x EVSTAT=%04x "
895 "OFFSET0=%04x OFFSET1=%04x SWSUPPORT0=%04x\n",
896 dev->name, regs.cmd, regs.evstat, regs.offset0, regs.offset1,
897 regs.swsupport0);
898
899 local->func->schedule_reset(local);
900 }
901
902
903 void hostap_setup_dev(struct net_device *dev, local_info_t *local,
904 int main_dev)
905 {
906 struct hostap_interface *iface;
907
908 iface = netdev_priv(dev);
909 ether_setup(dev);
910
911 /* kernel callbacks */
912 dev->get_stats = hostap_get_stats;
913 if (iface) {
914 /* Currently, we point to the proper spy_data only on
915 * the main_dev. This could be fixed. Jean II */
916 iface->wireless_data.spy_data = &iface->spy_data;
917 dev->wireless_data = &iface->wireless_data;
918 }
919 dev->wireless_handlers =
920 (struct iw_handler_def *) &hostap_iw_handler_def;
921 dev->do_ioctl = hostap_ioctl;
922 dev->open = prism2_open;
923 dev->stop = prism2_close;
924 dev->hard_start_xmit = hostap_data_start_xmit;
925 dev->set_mac_address = prism2_set_mac_address;
926 dev->set_multicast_list = hostap_set_multicast_list;
927 dev->change_mtu = prism2_change_mtu;
928 dev->tx_timeout = prism2_tx_timeout;
929 dev->watchdog_timeo = TX_TIMEOUT;
930
931 dev->mtu = local->mtu;
932 if (!main_dev) {
933 /* use main radio device queue */
934 dev->tx_queue_len = 0;
935 }
936
937 SET_ETHTOOL_OPS(dev, &prism2_ethtool_ops);
938
939 netif_stop_queue(dev);
940 }
941
942
943 static int hostap_enable_hostapd(local_info_t *local, int rtnl_locked)
944 {
945 struct net_device *dev = local->dev;
946
947 if (local->apdev)
948 return -EEXIST;
949
950 printk(KERN_DEBUG "%s: enabling hostapd mode\n", dev->name);
951
952 local->apdev = hostap_add_interface(local, HOSTAP_INTERFACE_AP,
953 rtnl_locked, local->ddev->name,
954 "ap");
955 if (local->apdev == NULL)
956 return -ENOMEM;
957
958 local->apdev->hard_start_xmit = hostap_mgmt_start_xmit;
959 local->apdev->type = ARPHRD_IEEE80211;
960 local->apdev->hard_header_parse = hostap_80211_header_parse;
961
962 return 0;
963 }
964
965
966 static int hostap_disable_hostapd(local_info_t *local, int rtnl_locked)
967 {
968 struct net_device *dev = local->dev;
969
970 printk(KERN_DEBUG "%s: disabling hostapd mode\n", dev->name);
971
972 hostap_remove_interface(local->apdev, rtnl_locked, 1);
973 local->apdev = NULL;
974
975 return 0;
976 }
977
978
979 static int hostap_enable_hostapd_sta(local_info_t *local, int rtnl_locked)
980 {
981 struct net_device *dev = local->dev;
982
983 if (local->stadev)
984 return -EEXIST;
985
986 printk(KERN_DEBUG "%s: enabling hostapd STA mode\n", dev->name);
987
988 local->stadev = hostap_add_interface(local, HOSTAP_INTERFACE_STA,
989 rtnl_locked, local->ddev->name,
990 "sta");
991 if (local->stadev == NULL)
992 return -ENOMEM;
993
994 return 0;
995 }
996
997
998 static int hostap_disable_hostapd_sta(local_info_t *local, int rtnl_locked)
999 {
1000 struct net_device *dev = local->dev;
1001
1002 printk(KERN_DEBUG "%s: disabling hostapd mode\n", dev->name);
1003
1004 hostap_remove_interface(local->stadev, rtnl_locked, 1);
1005 local->stadev = NULL;
1006
1007 return 0;
1008 }
1009
1010
1011 int hostap_set_hostapd(local_info_t *local, int val, int rtnl_locked)
1012 {
1013 int ret;
1014
1015 if (val < 0 || val > 1)
1016 return -EINVAL;
1017
1018 if (local->hostapd == val)
1019 return 0;
1020
1021 if (val) {
1022 ret = hostap_enable_hostapd(local, rtnl_locked);
1023 if (ret == 0)
1024 local->hostapd = 1;
1025 } else {
1026 local->hostapd = 0;
1027 ret = hostap_disable_hostapd(local, rtnl_locked);
1028 if (ret != 0)
1029 local->hostapd = 1;
1030 }
1031
1032 return ret;
1033 }
1034
1035
1036 int hostap_set_hostapd_sta(local_info_t *local, int val, int rtnl_locked)
1037 {
1038 int ret;
1039
1040 if (val < 0 || val > 1)
1041 return -EINVAL;
1042
1043 if (local->hostapd_sta == val)
1044 return 0;
1045
1046 if (val) {
1047 ret = hostap_enable_hostapd_sta(local, rtnl_locked);
1048 if (ret == 0)
1049 local->hostapd_sta = 1;
1050 } else {
1051 local->hostapd_sta = 0;
1052 ret = hostap_disable_hostapd_sta(local, rtnl_locked);
1053 if (ret != 0)
1054 local->hostapd_sta = 1;
1055 }
1056
1057
1058 return ret;
1059 }
1060
1061
1062 int prism2_update_comms_qual(struct net_device *dev)
1063 {
1064 struct hostap_interface *iface;
1065 local_info_t *local;
1066 int ret = 0;
1067 struct hfa384x_comms_quality sq;
1068
1069 iface = netdev_priv(dev);
1070 local = iface->local;
1071 if (!local->sta_fw_ver)
1072 ret = -1;
1073 else if (local->sta_fw_ver >= PRISM2_FW_VER(1,3,1)) {
1074 if (local->func->get_rid(local->dev,
1075 HFA384X_RID_DBMCOMMSQUALITY,
1076 &sq, sizeof(sq), 1) >= 0) {
1077 local->comms_qual = (s16) le16_to_cpu(sq.comm_qual);
1078 local->avg_signal = (s16) le16_to_cpu(sq.signal_level);
1079 local->avg_noise = (s16) le16_to_cpu(sq.noise_level);
1080 local->last_comms_qual_update = jiffies;
1081 } else
1082 ret = -1;
1083 } else {
1084 if (local->func->get_rid(local->dev, HFA384X_RID_COMMSQUALITY,
1085 &sq, sizeof(sq), 1) >= 0) {
1086 local->comms_qual = le16_to_cpu(sq.comm_qual);
1087 local->avg_signal = HFA384X_LEVEL_TO_dBm(
1088 le16_to_cpu(sq.signal_level));
1089 local->avg_noise = HFA384X_LEVEL_TO_dBm(
1090 le16_to_cpu(sq.noise_level));
1091 local->last_comms_qual_update = jiffies;
1092 } else
1093 ret = -1;
1094 }
1095
1096 return ret;
1097 }
1098
1099
1100 int prism2_sta_send_mgmt(local_info_t *local, u8 *dst, u8 stype,
1101 u8 *body, size_t bodylen)
1102 {
1103 struct sk_buff *skb;
1104 struct hostap_ieee80211_mgmt *mgmt;
1105 struct hostap_skb_tx_data *meta;
1106 struct net_device *dev = local->dev;
1107
1108 skb = dev_alloc_skb(IEEE80211_MGMT_HDR_LEN + bodylen);
1109 if (skb == NULL)
1110 return -ENOMEM;
1111
1112 mgmt = (struct hostap_ieee80211_mgmt *)
1113 skb_put(skb, IEEE80211_MGMT_HDR_LEN);
1114 memset(mgmt, 0, IEEE80211_MGMT_HDR_LEN);
1115 mgmt->frame_control =
1116 cpu_to_le16((WLAN_FC_TYPE_MGMT << 2) | (stype << 4));
1117 memcpy(mgmt->da, dst, ETH_ALEN);
1118 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1119 memcpy(mgmt->bssid, dst, ETH_ALEN);
1120 if (body)
1121 memcpy(skb_put(skb, bodylen), body, bodylen);
1122
1123 meta = (struct hostap_skb_tx_data *) skb->cb;
1124 memset(meta, 0, sizeof(*meta));
1125 meta->magic = HOSTAP_SKB_TX_DATA_MAGIC;
1126 meta->iface = netdev_priv(dev);
1127
1128 skb->dev = dev;
1129 skb->mac.raw = skb->nh.raw = skb->data;
1130 dev_queue_xmit(skb);
1131
1132 return 0;
1133 }
1134
1135
1136 int prism2_sta_deauth(local_info_t *local, u16 reason)
1137 {
1138 union iwreq_data wrqu;
1139 int ret;
1140
1141 if (local->iw_mode != IW_MODE_INFRA ||
1142 memcmp(local->bssid, "\x00\x00\x00\x00\x00\x00", ETH_ALEN) == 0 ||
1143 memcmp(local->bssid, "\x44\x44\x44\x44\x44\x44", ETH_ALEN) == 0)
1144 return 0;
1145
1146 reason = cpu_to_le16(reason);
1147 ret = prism2_sta_send_mgmt(local, local->bssid, WLAN_FC_STYPE_DEAUTH,
1148 (u8 *) &reason, 2);
1149 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
1150 wireless_send_event(local->dev, SIOCGIWAP, &wrqu, NULL);
1151 return ret;
1152 }
1153
1154
1155 struct proc_dir_entry *hostap_proc;
1156
1157 static int __init hostap_init(void)
1158 {
1159 hostap_crypto_init();
1160
1161 if (proc_net != NULL) {
1162 hostap_proc = proc_mkdir("hostap", proc_net);
1163 if (!hostap_proc)
1164 printk(KERN_WARNING "Failed to mkdir "
1165 "/proc/net/hostap\n");
1166 } else
1167 hostap_proc = NULL;
1168
1169 return 0;
1170 }
1171
1172
1173 static void __exit hostap_exit(void)
1174 {
1175 if (hostap_proc != NULL) {
1176 hostap_proc = NULL;
1177 remove_proc_entry("hostap", proc_net);
1178 }
1179
1180 hostap_crypto_deinit();
1181 }
1182
1183
1184 EXPORT_SYMBOL(hostap_set_word);
1185 EXPORT_SYMBOL(hostap_set_string);
1186 EXPORT_SYMBOL(hostap_get_porttype);
1187 EXPORT_SYMBOL(hostap_set_encryption);
1188 EXPORT_SYMBOL(hostap_set_antsel);
1189 EXPORT_SYMBOL(hostap_set_roaming);
1190 EXPORT_SYMBOL(hostap_set_auth_algs);
1191 EXPORT_SYMBOL(hostap_dump_rx_header);
1192 EXPORT_SYMBOL(hostap_dump_tx_header);
1193 EXPORT_SYMBOL(hostap_80211_header_parse);
1194 EXPORT_SYMBOL(hostap_80211_prism_header_parse);
1195 EXPORT_SYMBOL(hostap_80211_get_hdrlen);
1196 EXPORT_SYMBOL(hostap_get_stats);
1197 EXPORT_SYMBOL(hostap_setup_dev);
1198 EXPORT_SYMBOL(hostap_proc);
1199 EXPORT_SYMBOL(hostap_set_multicast_list_queue);
1200 EXPORT_SYMBOL(hostap_set_hostapd);
1201 EXPORT_SYMBOL(hostap_set_hostapd_sta);
1202 EXPORT_SYMBOL(hostap_add_interface);
1203 EXPORT_SYMBOL(hostap_remove_interface);
1204 EXPORT_SYMBOL(prism2_update_comms_qual);
1205
1206 module_init(hostap_init);
1207 module_exit(hostap_exit);
Linux kernel - Deliverables
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