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