Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[linux-2.6] / drivers / net / wireless / hostap / hostap_main.c
1 /*
2  * Host AP (software wireless LAN access point) driver for
3  * Intersil Prism2/2.5/3 - hostap.o module, common routines
4  *
5  * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
6  * <j@w1.fi>
7  * Copyright (c) 2002-2005, Jouni Malinen <j@w1.fi>
8  *
9  * This program is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License version 2 as
11  * published by the Free Software Foundation. See README and COPYING for
12  * more details.
13  */
14
15 #include <linux/module.h>
16 #include <linux/init.h>
17 #include <linux/slab.h>
18 #include <linux/proc_fs.h>
19 #include <linux/if_arp.h>
20 #include <linux/delay.h>
21 #include <linux/random.h>
22 #include <linux/workqueue.h>
23 #include <linux/kmod.h>
24 #include <linux/rtnetlink.h>
25 #include <linux/wireless.h>
26 #include <linux/etherdevice.h>
27 #include <net/net_namespace.h>
28 #include <net/iw_handler.h>
29 #include <net/ieee80211.h>
30 #include <net/lib80211.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         __le16 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->crypt_info.tx_keyidx;
347         if (local->crypt_info.crypt[idx] == NULL ||
348             local->crypt_info.crypt[idx]->ops == NULL)
349                 encrypt_type = NONE;
350         else if (strcmp(local->crypt_info.crypt[idx]->ops->name, "WEP") == 0)
351                 encrypt_type = WEP;
352         else
353                 encrypt_type = OTHER;
354
355         if (local->func->get_rid(local->dev, HFA384X_RID_CNFWEPFLAGS, &val, 2,
356                                  1) < 0) {
357                 printk(KERN_DEBUG "Could not read current WEP flags.\n");
358                 goto fail;
359         }
360         le16_to_cpus(&val);
361         old_val = val;
362
363         if (encrypt_type != NONE || local->privacy_invoked)
364                 val |= HFA384X_WEPFLAGS_PRIVACYINVOKED;
365         else
366                 val &= ~HFA384X_WEPFLAGS_PRIVACYINVOKED;
367
368         if (local->open_wep || encrypt_type == NONE ||
369             ((local->ieee_802_1x || local->wpa) && local->host_decrypt))
370                 val &= ~HFA384X_WEPFLAGS_EXCLUDEUNENCRYPTED;
371         else
372                 val |= HFA384X_WEPFLAGS_EXCLUDEUNENCRYPTED;
373
374         if ((encrypt_type != NONE || local->privacy_invoked) &&
375             (encrypt_type == OTHER || local->host_encrypt))
376                 val |= HFA384X_WEPFLAGS_HOSTENCRYPT;
377         else
378                 val &= ~HFA384X_WEPFLAGS_HOSTENCRYPT;
379         if ((encrypt_type != NONE || local->privacy_invoked) &&
380             (encrypt_type == OTHER || local->host_decrypt))
381                 val |= HFA384X_WEPFLAGS_HOSTDECRYPT;
382         else
383                 val &= ~HFA384X_WEPFLAGS_HOSTDECRYPT;
384
385         if (val != old_val &&
386             hostap_set_word(local->dev, HFA384X_RID_CNFWEPFLAGS, val)) {
387                 printk(KERN_DEBUG "Could not write new WEP flags (0x%x)\n",
388                        val);
389                 goto fail;
390         }
391
392         if (encrypt_type != WEP)
393                 return 0;
394
395         /* 104-bit support seems to require that all the keys are set to the
396          * same keylen */
397         keylen = 6; /* first 5 octets */
398         len = local->crypt_info.crypt[idx]->ops->get_key(keybuf, sizeof(keybuf), NULL,
399                                                            local->crypt_info.crypt[idx]->priv);
400         if (idx >= 0 && idx < WEP_KEYS && len > 5)
401                 keylen = WEP_KEY_LEN + 1; /* first 13 octets */
402
403         for (i = 0; i < WEP_KEYS; i++) {
404                 memset(keybuf, 0, sizeof(keybuf));
405                 if (local->crypt_info.crypt[i]) {
406                         (void) local->crypt_info.crypt[i]->ops->get_key(
407                                 keybuf, sizeof(keybuf),
408                                 NULL, local->crypt_info.crypt[i]->priv);
409                 }
410                 if (local->func->set_rid(local->dev,
411                                          HFA384X_RID_CNFDEFAULTKEY0 + i,
412                                          keybuf, keylen)) {
413                         printk(KERN_DEBUG "Could not set key %d (len=%d)\n",
414                                i, keylen);
415                         goto fail;
416                 }
417         }
418         if (hostap_set_word(local->dev, HFA384X_RID_CNFWEPDEFAULTKEYID, idx)) {
419                 printk(KERN_DEBUG "Could not set default keyid %d\n", idx);
420                 goto fail;
421         }
422
423         return 0;
424
425  fail:
426         printk(KERN_DEBUG "%s: encryption setup failed\n", local->dev->name);
427         return -1;
428 }
429
430
431 int hostap_set_antsel(local_info_t *local)
432 {
433         u16 val;
434         int ret = 0;
435
436         if (local->antsel_tx != HOSTAP_ANTSEL_DO_NOT_TOUCH &&
437             local->func->cmd(local->dev, HFA384X_CMDCODE_READMIF,
438                              HFA386X_CR_TX_CONFIGURE,
439                              NULL, &val) == 0) {
440                 val &= ~(BIT(2) | BIT(1));
441                 switch (local->antsel_tx) {
442                 case HOSTAP_ANTSEL_DIVERSITY:
443                         val |= BIT(1);
444                         break;
445                 case HOSTAP_ANTSEL_LOW:
446                         break;
447                 case HOSTAP_ANTSEL_HIGH:
448                         val |= BIT(2);
449                         break;
450                 }
451
452                 if (local->func->cmd(local->dev, HFA384X_CMDCODE_WRITEMIF,
453                                      HFA386X_CR_TX_CONFIGURE, &val, NULL)) {
454                         printk(KERN_INFO "%s: setting TX AntSel failed\n",
455                                local->dev->name);
456                         ret = -1;
457                 }
458         }
459
460         if (local->antsel_rx != HOSTAP_ANTSEL_DO_NOT_TOUCH &&
461             local->func->cmd(local->dev, HFA384X_CMDCODE_READMIF,
462                              HFA386X_CR_RX_CONFIGURE,
463                              NULL, &val) == 0) {
464                 val &= ~(BIT(1) | BIT(0));
465                 switch (local->antsel_rx) {
466                 case HOSTAP_ANTSEL_DIVERSITY:
467                         break;
468                 case HOSTAP_ANTSEL_LOW:
469                         val |= BIT(0);
470                         break;
471                 case HOSTAP_ANTSEL_HIGH:
472                         val |= BIT(0) | BIT(1);
473                         break;
474                 }
475
476                 if (local->func->cmd(local->dev, HFA384X_CMDCODE_WRITEMIF,
477                                      HFA386X_CR_RX_CONFIGURE, &val, NULL)) {
478                         printk(KERN_INFO "%s: setting RX AntSel failed\n",
479                                local->dev->name);
480                         ret = -1;
481                 }
482         }
483
484         return ret;
485 }
486
487
488 int hostap_set_roaming(local_info_t *local)
489 {
490         u16 val;
491
492         switch (local->host_roaming) {
493         case 1:
494                 val = HFA384X_ROAMING_HOST;
495                 break;
496         case 2:
497                 val = HFA384X_ROAMING_DISABLED;
498                 break;
499         case 0:
500         default:
501                 val = HFA384X_ROAMING_FIRMWARE;
502                 break;
503         }
504
505         return hostap_set_word(local->dev, HFA384X_RID_CNFROAMINGMODE, val);
506 }
507
508
509 int hostap_set_auth_algs(local_info_t *local)
510 {
511         int val = local->auth_algs;
512         /* At least STA f/w v0.6.2 seems to have issues with cnfAuthentication
513          * set to include both Open and Shared Key flags. It tries to use
514          * Shared Key authentication in that case even if WEP keys are not
515          * configured.. STA f/w v0.7.6 is able to handle such configuration,
516          * but it is unknown when this was fixed between 0.6.2 .. 0.7.6. */
517         if (local->sta_fw_ver < PRISM2_FW_VER(0,7,0) &&
518             val != PRISM2_AUTH_OPEN && val != PRISM2_AUTH_SHARED_KEY)
519                 val = PRISM2_AUTH_OPEN;
520
521         if (hostap_set_word(local->dev, HFA384X_RID_CNFAUTHENTICATION, val)) {
522                 printk(KERN_INFO "%s: cnfAuthentication setting to 0x%x "
523                        "failed\n", local->dev->name, local->auth_algs);
524                 return -EINVAL;
525         }
526
527         return 0;
528 }
529
530
531 void hostap_dump_rx_header(const char *name, const struct hfa384x_rx_frame *rx)
532 {
533         u16 status, fc;
534
535         status = __le16_to_cpu(rx->status);
536
537         printk(KERN_DEBUG "%s: RX status=0x%04x (port=%d, type=%d, "
538                "fcserr=%d) silence=%d signal=%d rate=%d rxflow=%d; "
539                "jiffies=%ld\n",
540                name, status, (status >> 8) & 0x07, status >> 13, status & 1,
541                rx->silence, rx->signal, rx->rate, rx->rxflow, jiffies);
542
543         fc = __le16_to_cpu(rx->frame_control);
544         printk(KERN_DEBUG "   FC=0x%04x (type=%d:%d) dur=0x%04x seq=0x%04x "
545                "data_len=%d%s%s\n",
546                fc, WLAN_FC_GET_TYPE(fc) >> 2, WLAN_FC_GET_STYPE(fc) >> 4,
547                __le16_to_cpu(rx->duration_id), __le16_to_cpu(rx->seq_ctrl),
548                __le16_to_cpu(rx->data_len),
549                fc & IEEE80211_FCTL_TODS ? " [ToDS]" : "",
550                fc & IEEE80211_FCTL_FROMDS ? " [FromDS]" : "");
551
552         printk(KERN_DEBUG "   A1=%pM A2=%pM A3=%pM A4=%pM\n",
553                rx->addr1, rx->addr2, rx->addr3, rx->addr4);
554
555         printk(KERN_DEBUG "   dst=%pM src=%pM len=%d\n",
556                rx->dst_addr, rx->src_addr,
557                __be16_to_cpu(rx->len));
558 }
559
560
561 void hostap_dump_tx_header(const char *name, const struct hfa384x_tx_frame *tx)
562 {
563         u16 fc;
564
565         printk(KERN_DEBUG "%s: TX status=0x%04x retry_count=%d tx_rate=%d "
566                "tx_control=0x%04x; jiffies=%ld\n",
567                name, __le16_to_cpu(tx->status), tx->retry_count, tx->tx_rate,
568                __le16_to_cpu(tx->tx_control), jiffies);
569
570         fc = __le16_to_cpu(tx->frame_control);
571         printk(KERN_DEBUG "   FC=0x%04x (type=%d:%d) dur=0x%04x seq=0x%04x "
572                "data_len=%d%s%s\n",
573                fc, WLAN_FC_GET_TYPE(fc) >> 2, WLAN_FC_GET_STYPE(fc) >> 4,
574                __le16_to_cpu(tx->duration_id), __le16_to_cpu(tx->seq_ctrl),
575                __le16_to_cpu(tx->data_len),
576                fc & IEEE80211_FCTL_TODS ? " [ToDS]" : "",
577                fc & IEEE80211_FCTL_FROMDS ? " [FromDS]" : "");
578
579         printk(KERN_DEBUG "   A1=%pM A2=%pM A3=%pM A4=%pM\n",
580                tx->addr1, tx->addr2, tx->addr3, tx->addr4);
581
582         printk(KERN_DEBUG "   dst=%pM src=%pM len=%d\n",
583                tx->dst_addr, tx->src_addr,
584                __be16_to_cpu(tx->len));
585 }
586
587
588 static int hostap_80211_header_parse(const struct sk_buff *skb,
589                                      unsigned char *haddr)
590 {
591         memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
592         return ETH_ALEN;
593 }
594
595
596 int hostap_80211_get_hdrlen(u16 fc)
597 {
598         int hdrlen = 24;
599
600         switch (WLAN_FC_GET_TYPE(fc)) {
601         case IEEE80211_FTYPE_DATA:
602                 if ((fc & IEEE80211_FCTL_FROMDS) && (fc & IEEE80211_FCTL_TODS))
603                         hdrlen = 30; /* Addr4 */
604                 break;
605         case IEEE80211_FTYPE_CTL:
606                 switch (WLAN_FC_GET_STYPE(fc)) {
607                 case IEEE80211_STYPE_CTS:
608                 case IEEE80211_STYPE_ACK:
609                         hdrlen = 10;
610                         break;
611                 default:
612                         hdrlen = 16;
613                         break;
614                 }
615                 break;
616         }
617
618         return hdrlen;
619 }
620
621
622 struct net_device_stats *hostap_get_stats(struct net_device *dev)
623 {
624         struct hostap_interface *iface;
625         iface = netdev_priv(dev);
626         return &iface->stats;
627 }
628
629
630 static int prism2_close(struct net_device *dev)
631 {
632         struct hostap_interface *iface;
633         local_info_t *local;
634
635         PDEBUG(DEBUG_FLOW, "%s: prism2_close\n", dev->name);
636
637         iface = netdev_priv(dev);
638         local = iface->local;
639
640         if (dev == local->ddev) {
641                 prism2_sta_deauth(local, WLAN_REASON_DEAUTH_LEAVING);
642         }
643 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
644         if (!local->hostapd && dev == local->dev &&
645             (!local->func->card_present || local->func->card_present(local)) &&
646             local->hw_ready && local->ap && local->iw_mode == IW_MODE_MASTER)
647                 hostap_deauth_all_stas(dev, local->ap, 1);
648 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
649
650         if (dev == local->dev) {
651                 local->func->hw_shutdown(dev, HOSTAP_HW_ENABLE_CMDCOMPL);
652         }
653
654         if (netif_running(dev)) {
655                 netif_stop_queue(dev);
656                 netif_device_detach(dev);
657         }
658
659         cancel_work_sync(&local->reset_queue);
660         cancel_work_sync(&local->set_multicast_list_queue);
661         cancel_work_sync(&local->set_tim_queue);
662 #ifndef PRISM2_NO_STATION_MODES
663         cancel_work_sync(&local->info_queue);
664 #endif
665         cancel_work_sync(&local->comms_qual_update);
666
667         module_put(local->hw_module);
668
669         local->num_dev_open--;
670
671         if (dev != local->dev && local->dev->flags & IFF_UP &&
672             local->master_dev_auto_open && local->num_dev_open == 1) {
673                 /* Close master radio interface automatically if it was also
674                  * opened automatically and we are now closing the last
675                  * remaining non-master device. */
676                 dev_close(local->dev);
677         }
678
679         return 0;
680 }
681
682
683 static int prism2_open(struct net_device *dev)
684 {
685         struct hostap_interface *iface;
686         local_info_t *local;
687
688         PDEBUG(DEBUG_FLOW, "%s: prism2_open\n", dev->name);
689
690         iface = netdev_priv(dev);
691         local = iface->local;
692
693         if (local->no_pri) {
694                 printk(KERN_DEBUG "%s: could not set interface UP - no PRI "
695                        "f/w\n", dev->name);
696                 return 1;
697         }
698
699         if ((local->func->card_present && !local->func->card_present(local)) ||
700             local->hw_downloading)
701                 return -ENODEV;
702
703         if (!try_module_get(local->hw_module))
704                 return -ENODEV;
705         local->num_dev_open++;
706
707         if (!local->dev_enabled && local->func->hw_enable(dev, 1)) {
708                 printk(KERN_WARNING "%s: could not enable MAC port\n",
709                        dev->name);
710                 prism2_close(dev);
711                 return 1;
712         }
713         if (!local->dev_enabled)
714                 prism2_callback(local, PRISM2_CALLBACK_ENABLE);
715         local->dev_enabled = 1;
716
717         if (dev != local->dev && !(local->dev->flags & IFF_UP)) {
718                 /* Master radio interface is needed for all operation, so open
719                  * it automatically when any virtual net_device is opened. */
720                 local->master_dev_auto_open = 1;
721                 dev_open(local->dev);
722         }
723
724         netif_device_attach(dev);
725         netif_start_queue(dev);
726
727         return 0;
728 }
729
730
731 static int prism2_set_mac_address(struct net_device *dev, void *p)
732 {
733         struct hostap_interface *iface;
734         local_info_t *local;
735         struct list_head *ptr;
736         struct sockaddr *addr = p;
737
738         iface = netdev_priv(dev);
739         local = iface->local;
740
741         if (local->func->set_rid(dev, HFA384X_RID_CNFOWNMACADDR, addr->sa_data,
742                                  ETH_ALEN) < 0 || local->func->reset_port(dev))
743                 return -EINVAL;
744
745         read_lock_bh(&local->iface_lock);
746         list_for_each(ptr, &local->hostap_interfaces) {
747                 iface = list_entry(ptr, struct hostap_interface, list);
748                 memcpy(iface->dev->dev_addr, addr->sa_data, ETH_ALEN);
749         }
750         memcpy(local->dev->dev_addr, addr->sa_data, ETH_ALEN);
751         read_unlock_bh(&local->iface_lock);
752
753         return 0;
754 }
755
756
757 /* TODO: to be further implemented as soon as Prism2 fully supports
758  *       GroupAddresses and correct documentation is available */
759 void hostap_set_multicast_list_queue(struct work_struct *work)
760 {
761         local_info_t *local =
762                 container_of(work, local_info_t, set_multicast_list_queue);
763         struct net_device *dev = local->dev;
764         struct hostap_interface *iface;
765
766         iface = netdev_priv(dev);
767         if (hostap_set_word(dev, HFA384X_RID_PROMISCUOUSMODE,
768                             local->is_promisc)) {
769                 printk(KERN_INFO "%s: %sabling promiscuous mode failed\n",
770                        dev->name, local->is_promisc ? "en" : "dis");
771         }
772 }
773
774
775 static void hostap_set_multicast_list(struct net_device *dev)
776 {
777 #if 0
778         /* FIX: promiscuous mode seems to be causing a lot of problems with
779          * some station firmware versions (FCSErr frames, invalid MACPort, etc.
780          * corrupted incoming frames). This code is now commented out while the
781          * problems are investigated. */
782         struct hostap_interface *iface;
783         local_info_t *local;
784
785         iface = netdev_priv(dev);
786         local = iface->local;
787         if ((dev->flags & IFF_ALLMULTI) || (dev->flags & IFF_PROMISC)) {
788                 local->is_promisc = 1;
789         } else {
790                 local->is_promisc = 0;
791         }
792
793         schedule_work(&local->set_multicast_list_queue);
794 #endif
795 }
796
797
798 static int prism2_change_mtu(struct net_device *dev, int new_mtu)
799 {
800         if (new_mtu < PRISM2_MIN_MTU || new_mtu > PRISM2_MAX_MTU)
801                 return -EINVAL;
802
803         dev->mtu = new_mtu;
804         return 0;
805 }
806
807
808 static void prism2_tx_timeout(struct net_device *dev)
809 {
810         struct hostap_interface *iface;
811         local_info_t *local;
812         struct hfa384x_regs regs;
813
814         iface = netdev_priv(dev);
815         local = iface->local;
816
817         printk(KERN_WARNING "%s Tx timed out! Resetting card\n", dev->name);
818         netif_stop_queue(local->dev);
819
820         local->func->read_regs(dev, &regs);
821         printk(KERN_DEBUG "%s: CMD=%04x EVSTAT=%04x "
822                "OFFSET0=%04x OFFSET1=%04x SWSUPPORT0=%04x\n",
823                dev->name, regs.cmd, regs.evstat, regs.offset0, regs.offset1,
824                regs.swsupport0);
825
826         local->func->schedule_reset(local);
827 }
828
829 const struct header_ops hostap_80211_ops = {
830         .create         = eth_header,
831         .rebuild        = eth_rebuild_header,
832         .cache          = eth_header_cache,
833         .cache_update   = eth_header_cache_update,
834         .parse          = hostap_80211_header_parse,
835 };
836 EXPORT_SYMBOL(hostap_80211_ops);
837
838 void hostap_setup_dev(struct net_device *dev, local_info_t *local,
839                       int type)
840 {
841         struct hostap_interface *iface;
842
843         iface = netdev_priv(dev);
844         ether_setup(dev);
845
846         /* kernel callbacks */
847         dev->get_stats = hostap_get_stats;
848         if (iface) {
849                 /* Currently, we point to the proper spy_data only on
850                  * the main_dev. This could be fixed. Jean II */
851                 iface->wireless_data.spy_data = &iface->spy_data;
852                 dev->wireless_data = &iface->wireless_data;
853         }
854         dev->wireless_handlers =
855                 (struct iw_handler_def *) &hostap_iw_handler_def;
856         dev->do_ioctl = hostap_ioctl;
857         dev->open = prism2_open;
858         dev->stop = prism2_close;
859         dev->set_mac_address = prism2_set_mac_address;
860         dev->set_multicast_list = hostap_set_multicast_list;
861         dev->change_mtu = prism2_change_mtu;
862         dev->tx_timeout = prism2_tx_timeout;
863         dev->watchdog_timeo = TX_TIMEOUT;
864
865         if (type == HOSTAP_INTERFACE_AP) {
866                 dev->hard_start_xmit = hostap_mgmt_start_xmit;
867                 dev->type = ARPHRD_IEEE80211;
868                 dev->header_ops = &hostap_80211_ops;
869         } else {
870                 dev->hard_start_xmit = hostap_data_start_xmit;
871         }
872
873         dev->mtu = local->mtu;
874         if (type != HOSTAP_INTERFACE_MASTER) {
875                 /* use main radio device queue */
876                 dev->tx_queue_len = 0;
877         }
878
879         SET_ETHTOOL_OPS(dev, &prism2_ethtool_ops);
880
881         netif_stop_queue(dev);
882 }
883
884 static int hostap_enable_hostapd(local_info_t *local, int rtnl_locked)
885 {
886         struct net_device *dev = local->dev;
887
888         if (local->apdev)
889                 return -EEXIST;
890
891         printk(KERN_DEBUG "%s: enabling hostapd mode\n", dev->name);
892
893         local->apdev = hostap_add_interface(local, HOSTAP_INTERFACE_AP,
894                                             rtnl_locked, local->ddev->name,
895                                             "ap");
896         if (local->apdev == NULL)
897                 return -ENOMEM;
898
899         return 0;
900 }
901
902
903 static int hostap_disable_hostapd(local_info_t *local, int rtnl_locked)
904 {
905         struct net_device *dev = local->dev;
906
907         printk(KERN_DEBUG "%s: disabling hostapd mode\n", dev->name);
908
909         hostap_remove_interface(local->apdev, rtnl_locked, 1);
910         local->apdev = NULL;
911
912         return 0;
913 }
914
915
916 static int hostap_enable_hostapd_sta(local_info_t *local, int rtnl_locked)
917 {
918         struct net_device *dev = local->dev;
919
920         if (local->stadev)
921                 return -EEXIST;
922
923         printk(KERN_DEBUG "%s: enabling hostapd STA mode\n", dev->name);
924
925         local->stadev = hostap_add_interface(local, HOSTAP_INTERFACE_STA,
926                                              rtnl_locked, local->ddev->name,
927                                              "sta");
928         if (local->stadev == NULL)
929                 return -ENOMEM;
930
931         return 0;
932 }
933
934
935 static int hostap_disable_hostapd_sta(local_info_t *local, int rtnl_locked)
936 {
937         struct net_device *dev = local->dev;
938
939         printk(KERN_DEBUG "%s: disabling hostapd mode\n", dev->name);
940
941         hostap_remove_interface(local->stadev, rtnl_locked, 1);
942         local->stadev = NULL;
943
944         return 0;
945 }
946
947
948 int hostap_set_hostapd(local_info_t *local, int val, int rtnl_locked)
949 {
950         int ret;
951
952         if (val < 0 || val > 1)
953                 return -EINVAL;
954
955         if (local->hostapd == val)
956                 return 0;
957
958         if (val) {
959                 ret = hostap_enable_hostapd(local, rtnl_locked);
960                 if (ret == 0)
961                         local->hostapd = 1;
962         } else {
963                 local->hostapd = 0;
964                 ret = hostap_disable_hostapd(local, rtnl_locked);
965                 if (ret != 0)
966                         local->hostapd = 1;
967         }
968
969         return ret;
970 }
971
972
973 int hostap_set_hostapd_sta(local_info_t *local, int val, int rtnl_locked)
974 {
975         int ret;
976
977         if (val < 0 || val > 1)
978                 return -EINVAL;
979
980         if (local->hostapd_sta == val)
981                 return 0;
982
983         if (val) {
984                 ret = hostap_enable_hostapd_sta(local, rtnl_locked);
985                 if (ret == 0)
986                         local->hostapd_sta = 1;
987         } else {
988                 local->hostapd_sta = 0;
989                 ret = hostap_disable_hostapd_sta(local, rtnl_locked);
990                 if (ret != 0)
991                         local->hostapd_sta = 1;
992         }
993
994
995         return ret;
996 }
997
998
999 int prism2_update_comms_qual(struct net_device *dev)
1000 {
1001         struct hostap_interface *iface;
1002         local_info_t *local;
1003         int ret = 0;
1004         struct hfa384x_comms_quality sq;
1005
1006         iface = netdev_priv(dev);
1007         local = iface->local;
1008         if (!local->sta_fw_ver)
1009                 ret = -1;
1010         else if (local->sta_fw_ver >= PRISM2_FW_VER(1,3,1)) {
1011                 if (local->func->get_rid(local->dev,
1012                                          HFA384X_RID_DBMCOMMSQUALITY,
1013                                          &sq, sizeof(sq), 1) >= 0) {
1014                         local->comms_qual = (s16) le16_to_cpu(sq.comm_qual);
1015                         local->avg_signal = (s16) le16_to_cpu(sq.signal_level);
1016                         local->avg_noise = (s16) le16_to_cpu(sq.noise_level);
1017                         local->last_comms_qual_update = jiffies;
1018                 } else
1019                         ret = -1;
1020         } else {
1021                 if (local->func->get_rid(local->dev, HFA384X_RID_COMMSQUALITY,
1022                                          &sq, sizeof(sq), 1) >= 0) {
1023                         local->comms_qual = le16_to_cpu(sq.comm_qual);
1024                         local->avg_signal = HFA384X_LEVEL_TO_dBm(
1025                                 le16_to_cpu(sq.signal_level));
1026                         local->avg_noise = HFA384X_LEVEL_TO_dBm(
1027                                 le16_to_cpu(sq.noise_level));
1028                         local->last_comms_qual_update = jiffies;
1029                 } else
1030                         ret = -1;
1031         }
1032
1033         return ret;
1034 }
1035
1036
1037 int prism2_sta_send_mgmt(local_info_t *local, u8 *dst, u16 stype,
1038                          u8 *body, size_t bodylen)
1039 {
1040         struct sk_buff *skb;
1041         struct hostap_ieee80211_mgmt *mgmt;
1042         struct hostap_skb_tx_data *meta;
1043         struct net_device *dev = local->dev;
1044
1045         skb = dev_alloc_skb(IEEE80211_MGMT_HDR_LEN + bodylen);
1046         if (skb == NULL)
1047                 return -ENOMEM;
1048
1049         mgmt = (struct hostap_ieee80211_mgmt *)
1050                 skb_put(skb, IEEE80211_MGMT_HDR_LEN);
1051         memset(mgmt, 0, IEEE80211_MGMT_HDR_LEN);
1052         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1053         memcpy(mgmt->da, dst, ETH_ALEN);
1054         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1055         memcpy(mgmt->bssid, dst, ETH_ALEN);
1056         if (body)
1057                 memcpy(skb_put(skb, bodylen), body, bodylen);
1058
1059         meta = (struct hostap_skb_tx_data *) skb->cb;
1060         memset(meta, 0, sizeof(*meta));
1061         meta->magic = HOSTAP_SKB_TX_DATA_MAGIC;
1062         meta->iface = netdev_priv(dev);
1063
1064         skb->dev = dev;
1065         skb_reset_mac_header(skb);
1066         skb_reset_network_header(skb);
1067         dev_queue_xmit(skb);
1068
1069         return 0;
1070 }
1071
1072
1073 int prism2_sta_deauth(local_info_t *local, u16 reason)
1074 {
1075         union iwreq_data wrqu;
1076         int ret;
1077         __le16 val = cpu_to_le16(reason);
1078
1079         if (local->iw_mode != IW_MODE_INFRA ||
1080             memcmp(local->bssid, "\x00\x00\x00\x00\x00\x00", ETH_ALEN) == 0 ||
1081             memcmp(local->bssid, "\x44\x44\x44\x44\x44\x44", ETH_ALEN) == 0)
1082                 return 0;
1083
1084         ret = prism2_sta_send_mgmt(local, local->bssid, IEEE80211_STYPE_DEAUTH,
1085                                    (u8 *) &val, 2);
1086         memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
1087         wireless_send_event(local->dev, SIOCGIWAP, &wrqu, NULL);
1088         return ret;
1089 }
1090
1091
1092 struct proc_dir_entry *hostap_proc;
1093
1094 static int __init hostap_init(void)
1095 {
1096         if (init_net.proc_net != NULL) {
1097                 hostap_proc = proc_mkdir("hostap", init_net.proc_net);
1098                 if (!hostap_proc)
1099                         printk(KERN_WARNING "Failed to mkdir "
1100                                "/proc/net/hostap\n");
1101         } else
1102                 hostap_proc = NULL;
1103
1104         return 0;
1105 }
1106
1107
1108 static void __exit hostap_exit(void)
1109 {
1110         if (hostap_proc != NULL) {
1111                 hostap_proc = NULL;
1112                 remove_proc_entry("hostap", init_net.proc_net);
1113         }
1114 }
1115
1116
1117 EXPORT_SYMBOL(hostap_set_word);
1118 EXPORT_SYMBOL(hostap_set_string);
1119 EXPORT_SYMBOL(hostap_get_porttype);
1120 EXPORT_SYMBOL(hostap_set_encryption);
1121 EXPORT_SYMBOL(hostap_set_antsel);
1122 EXPORT_SYMBOL(hostap_set_roaming);
1123 EXPORT_SYMBOL(hostap_set_auth_algs);
1124 EXPORT_SYMBOL(hostap_dump_rx_header);
1125 EXPORT_SYMBOL(hostap_dump_tx_header);
1126 EXPORT_SYMBOL(hostap_80211_get_hdrlen);
1127 EXPORT_SYMBOL(hostap_get_stats);
1128 EXPORT_SYMBOL(hostap_setup_dev);
1129 EXPORT_SYMBOL(hostap_set_multicast_list_queue);
1130 EXPORT_SYMBOL(hostap_set_hostapd);
1131 EXPORT_SYMBOL(hostap_set_hostapd_sta);
1132 EXPORT_SYMBOL(hostap_add_interface);
1133 EXPORT_SYMBOL(hostap_remove_interface);
1134 EXPORT_SYMBOL(prism2_update_comms_qual);
1135
1136 module_init(hostap_init);
1137 module_exit(hostap_exit);