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[PATCH] mac80211: fix interface initialisation and deinitialisation
[linux-2.6/kvm.git] / net / mac80211 / ieee80211.c
blob52638194e45fbd4616e4343569b3b236ae7164fe
1 /*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11 #include <net/mac80211.h>
12 #include <net/ieee80211_radiotap.h>
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/netdevice.h>
16 #include <linux/types.h>
17 #include <linux/slab.h>
18 #include <linux/skbuff.h>
19 #include <linux/etherdevice.h>
20 #include <linux/if_arp.h>
21 #include <linux/wireless.h>
22 #include <linux/rtnetlink.h>
23 #include <linux/bitmap.h>
24 #include <net/net_namespace.h>
25 #include <net/cfg80211.h>
26
27 #include "ieee80211_common.h"
28 #include "ieee80211_i.h"
29 #include "ieee80211_rate.h"
30 #include "wep.h"
31 #include "wme.h"
32 #include "aes_ccm.h"
33 #include "ieee80211_led.h"
34 #include "cfg.h"
35 #include "debugfs.h"
36 #include "debugfs_netdev.h"
37
38 /*
39 * For seeing transmitted packets on monitor interfaces
40 * we have a radiotap header too.
41 */
42 struct ieee80211_tx_status_rtap_hdr {
43 struct ieee80211_radiotap_header hdr;
44 __le16 tx_flags;
45 u8 data_retries;
46 } __attribute__ ((packed));
47
48 /* common interface routines */
49
50 static int header_parse_80211(const struct sk_buff *skb, unsigned char *haddr)
51 {
52 memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
53 return ETH_ALEN;
54 }
55
56 /* must be called under mdev tx lock */
57 static void ieee80211_configure_filter(struct ieee80211_local *local)
58 {
59 unsigned int changed_flags;
60 unsigned int new_flags = 0;
61
62 if (local->iff_promiscs)
63 new_flags |= FIF_PROMISC_IN_BSS;
64
65 if (local->iff_allmultis)
66 new_flags |= FIF_ALLMULTI;
67
68 if (local->monitors)
69 new_flags |= FIF_CONTROL |
70 FIF_OTHER_BSS |
71 FIF_BCN_PRBRESP_PROMISC;
72
73 changed_flags = local->filter_flags ^ new_flags;
74
75 /* be a bit nasty */
76 new_flags |= (1<<31);
77
78 local->ops->configure_filter(local_to_hw(local),
79 changed_flags, &new_flags,
80 local->mdev->mc_count,
81 local->mdev->mc_list);
82
83 WARN_ON(new_flags & (1<<31));
84
85 local->filter_flags = new_flags & ~(1<<31);
86 }
87
88 /* master interface */
89
90 static int ieee80211_master_open(struct net_device *dev)
91 {
92 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
93 struct ieee80211_sub_if_data *sdata;
94 int res = -EOPNOTSUPP;
95
96 /* we hold the RTNL here so can safely walk the list */
97 list_for_each_entry(sdata, &local->interfaces, list) {
98 if (sdata->dev != dev && netif_running(sdata->dev)) {
99 res = 0;
100 break;
101 }
102 }
103 return res;
104 }
105
106 static int ieee80211_master_stop(struct net_device *dev)
107 {
108 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
109 struct ieee80211_sub_if_data *sdata;
110
111 /* we hold the RTNL here so can safely walk the list */
112 list_for_each_entry(sdata, &local->interfaces, list)
113 if (sdata->dev != dev && netif_running(sdata->dev))
114 dev_close(sdata->dev);
115
116 return 0;
117 }
118
119 static void ieee80211_master_set_multicast_list(struct net_device *dev)
120 {
121 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
122
123 ieee80211_configure_filter(local);
124 }
125
126 /* management interface */
127
128 static void
129 ieee80211_fill_frame_info(struct ieee80211_local *local,
130 struct ieee80211_frame_info *fi,
131 struct ieee80211_rx_status *status)
132 {
133 if (status) {
134 struct timespec ts;
135 struct ieee80211_rate *rate;
136
137 jiffies_to_timespec(jiffies, &ts);
138 fi->hosttime = cpu_to_be64((u64) ts.tv_sec * 1000000 +
139 ts.tv_nsec / 1000);
140 fi->mactime = cpu_to_be64(status->mactime);
141 switch (status->phymode) {
142 case MODE_IEEE80211A:
143 fi->phytype = htonl(ieee80211_phytype_ofdm_dot11_a);
144 break;
145 case MODE_IEEE80211B:
146 fi->phytype = htonl(ieee80211_phytype_dsss_dot11_b);
147 break;
148 case MODE_IEEE80211G:
149 fi->phytype = htonl(ieee80211_phytype_pbcc_dot11_g);
150 break;
151 default:
152 fi->phytype = htonl(0xAAAAAAAA);
153 break;
154 }
155 fi->channel = htonl(status->channel);
156 rate = ieee80211_get_rate(local, status->phymode,
157 status->rate);
158 if (rate) {
159 fi->datarate = htonl(rate->rate);
160 if (rate->flags & IEEE80211_RATE_PREAMBLE2) {
161 if (status->rate == rate->val)
162 fi->preamble = htonl(2); /* long */
163 else if (status->rate == rate->val2)
164 fi->preamble = htonl(1); /* short */
165 } else
166 fi->preamble = htonl(0);
167 } else {
168 fi->datarate = htonl(0);
169 fi->preamble = htonl(0);
170 }
171
172 fi->antenna = htonl(status->antenna);
173 fi->priority = htonl(0xffffffff); /* no clue */
174 fi->ssi_type = htonl(ieee80211_ssi_raw);
175 fi->ssi_signal = htonl(status->ssi);
176 fi->ssi_noise = 0x00000000;
177 fi->encoding = 0;
178 } else {
179 /* clear everything because we really don't know.
180 * the msg_type field isn't present on monitor frames
181 * so we don't know whether it will be present or not,
182 * but it's ok to not clear it since it'll be assigned
183 * anyway */
184 memset(fi, 0, sizeof(*fi) - sizeof(fi->msg_type));
185
186 fi->ssi_type = htonl(ieee80211_ssi_none);
187 }
188 fi->version = htonl(IEEE80211_FI_VERSION);
189 fi->length = cpu_to_be32(sizeof(*fi) - sizeof(fi->msg_type));
190 }
191
192 /* this routine is actually not just for this, but also
193 * for pushing fake 'management' frames into userspace.
194 * it shall be replaced by a netlink-based system. */
195 void
196 ieee80211_rx_mgmt(struct ieee80211_local *local, struct sk_buff *skb,
197 struct ieee80211_rx_status *status, u32 msg_type)
198 {
199 struct ieee80211_frame_info *fi;
200 const size_t hlen = sizeof(struct ieee80211_frame_info);
201 struct net_device *dev = local->apdev;
202
203 skb->dev = dev;
204
205 if (skb_headroom(skb) < hlen) {
206 I802_DEBUG_INC(local->rx_expand_skb_head);
207 if (pskb_expand_head(skb, hlen, 0, GFP_ATOMIC)) {
208 dev_kfree_skb(skb);
209 return;
210 }
211 }
212
213 fi = (struct ieee80211_frame_info *) skb_push(skb, hlen);
214
215 ieee80211_fill_frame_info(local, fi, status);
216 fi->msg_type = htonl(msg_type);
217
218 dev->stats.rx_packets++;
219 dev->stats.rx_bytes += skb->len;
220
221 skb_set_mac_header(skb, 0);
222 skb->ip_summed = CHECKSUM_UNNECESSARY;
223 skb->pkt_type = PACKET_OTHERHOST;
224 skb->protocol = htons(ETH_P_802_2);
225 memset(skb->cb, 0, sizeof(skb->cb));
226 netif_rx(skb);
227 }
228
229 static int ieee80211_mgmt_open(struct net_device *dev)
230 {
231 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
232
233 if (!netif_running(local->mdev))
234 return -EOPNOTSUPP;
235 return 0;
236 }
237
238 static int ieee80211_mgmt_stop(struct net_device *dev)
239 {
240 return 0;
241 }
242
243 static int ieee80211_change_mtu_apdev(struct net_device *dev, int new_mtu)
244 {
245 /* FIX: what would be proper limits for MTU?
246 * This interface uses 802.11 frames. */
247 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN) {
248 printk(KERN_WARNING "%s: invalid MTU %d\n",
249 dev->name, new_mtu);
250 return -EINVAL;
251 }
252
253 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
254 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
255 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
256 dev->mtu = new_mtu;
257 return 0;
258 }
259
260 void ieee80211_if_mgmt_setup(struct net_device *dev)
261 {
262 ether_setup(dev);
263 dev->hard_start_xmit = ieee80211_mgmt_start_xmit;
264 dev->change_mtu = ieee80211_change_mtu_apdev;
265 dev->open = ieee80211_mgmt_open;
266 dev->stop = ieee80211_mgmt_stop;
267 dev->type = ARPHRD_IEEE80211_PRISM;
268 dev->destructor = ieee80211_if_free;
269 }
270
271 /* regular interfaces */
272
273 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
274 {
275 /* FIX: what would be proper limits for MTU?
276 * This interface uses 802.3 frames. */
277 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6) {
278 printk(KERN_WARNING "%s: invalid MTU %d\n",
279 dev->name, new_mtu);
280 return -EINVAL;
281 }
282
283 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
284 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
285 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
286 dev->mtu = new_mtu;
287 return 0;
288 }
289
290 static inline int identical_mac_addr_allowed(int type1, int type2)
291 {
292 return (type1 == IEEE80211_IF_TYPE_MNTR ||
293 type2 == IEEE80211_IF_TYPE_MNTR ||
294 (type1 == IEEE80211_IF_TYPE_AP &&
295 type2 == IEEE80211_IF_TYPE_WDS) ||
296 (type1 == IEEE80211_IF_TYPE_WDS &&
297 (type2 == IEEE80211_IF_TYPE_WDS ||
298 type2 == IEEE80211_IF_TYPE_AP)) ||
299 (type1 == IEEE80211_IF_TYPE_AP &&
300 type2 == IEEE80211_IF_TYPE_VLAN) ||
301 (type1 == IEEE80211_IF_TYPE_VLAN &&
302 (type2 == IEEE80211_IF_TYPE_AP ||
303 type2 == IEEE80211_IF_TYPE_VLAN)));
304 }
305
306 static int ieee80211_open(struct net_device *dev)
307 {
308 struct ieee80211_sub_if_data *sdata, *nsdata;
309 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
310 struct ieee80211_if_init_conf conf;
311 int res;
312
313 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
314
315 /* we hold the RTNL here so can safely walk the list */
316 list_for_each_entry(nsdata, &local->interfaces, list) {
317 struct net_device *ndev = nsdata->dev;
318
319 if (ndev != dev && ndev != local->mdev && netif_running(ndev) &&
320 compare_ether_addr(dev->dev_addr, ndev->dev_addr) == 0) {
321 /*
322 * check whether it may have the same address
323 */
324 if (!identical_mac_addr_allowed(sdata->type,
325 nsdata->type))
326 return -ENOTUNIQ;
327
328 /*
329 * can only add VLANs to enabled APs
330 */
331 if (sdata->type == IEEE80211_IF_TYPE_VLAN &&
332 nsdata->type == IEEE80211_IF_TYPE_AP &&
333 netif_running(nsdata->dev))
334 sdata->u.vlan.ap = nsdata;
335 }
336 }
337
338 switch (sdata->type) {
339 case IEEE80211_IF_TYPE_WDS:
340 if (is_zero_ether_addr(sdata->u.wds.remote_addr))
341 return -ENOLINK;
342 break;
343 case IEEE80211_IF_TYPE_VLAN:
344 if (!sdata->u.vlan.ap)
345 return -ENOLINK;
346 break;
347 }
348
349 if (local->open_count == 0) {
350 res = 0;
351 if (local->ops->start)
352 res = local->ops->start(local_to_hw(local));
353 if (res)
354 return res;
355 }
356
357 switch (sdata->type) {
358 case IEEE80211_IF_TYPE_VLAN:
359 list_add(&sdata->u.vlan.list, &sdata->u.vlan.ap->u.ap.vlans);
360 /* no need to tell driver */
361 break;
362 case IEEE80211_IF_TYPE_MNTR:
363 /* must be before the call to ieee80211_configure_filter */
364 local->monitors++;
365 if (local->monitors == 1) {
366 netif_tx_lock_bh(local->mdev);
367 ieee80211_configure_filter(local);
368 netif_tx_unlock_bh(local->mdev);
369
370 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
371 ieee80211_hw_config(local);
372 }
373 break;
374 case IEEE80211_IF_TYPE_STA:
375 case IEEE80211_IF_TYPE_IBSS:
376 sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET;
377 /* fall through */
378 default:
379 conf.if_id = dev->ifindex;
380 conf.type = sdata->type;
381 conf.mac_addr = dev->dev_addr;
382 res = local->ops->add_interface(local_to_hw(local), &conf);
383 if (res && !local->open_count && local->ops->stop)
384 local->ops->stop(local_to_hw(local));
385 if (res)
386 return res;
387
388 ieee80211_if_config(dev);
389 ieee80211_reset_erp_info(dev);
390 ieee80211_enable_keys(sdata);
391
392 if (sdata->type == IEEE80211_IF_TYPE_STA &&
393 !local->user_space_mlme)
394 netif_carrier_off(dev);
395 else
396 netif_carrier_on(dev);
397 }
398
399 if (local->open_count == 0) {
400 res = dev_open(local->mdev);
401 WARN_ON(res);
402 if (local->apdev) {
403 res = dev_open(local->apdev);
404 WARN_ON(res);
405 }
406 tasklet_enable(&local->tx_pending_tasklet);
407 tasklet_enable(&local->tasklet);
408 }
409
410 local->open_count++;
411
412 netif_start_queue(dev);
413
414 return 0;
415 }
416
417 static int ieee80211_stop(struct net_device *dev)
418 {
419 struct ieee80211_sub_if_data *sdata;
420 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
421 struct ieee80211_if_init_conf conf;
422
423 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
424
425 netif_stop_queue(dev);
426
427 dev_mc_unsync(local->mdev, dev);
428
429 /* down all dependent devices, that is VLANs */
430 if (sdata->type == IEEE80211_IF_TYPE_AP) {
431 struct ieee80211_sub_if_data *vlan, *tmp;
432
433 list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans,
434 u.vlan.list)
435 dev_close(vlan->dev);
436 WARN_ON(!list_empty(&sdata->u.ap.vlans));
437 }
438
439 local->open_count--;
440
441 switch (sdata->type) {
442 case IEEE80211_IF_TYPE_VLAN:
443 list_del(&sdata->u.vlan.list);
444 sdata->u.vlan.ap = NULL;
445 /* no need to tell driver */
446 break;
447 case IEEE80211_IF_TYPE_MNTR:
448 local->monitors--;
449 if (local->monitors == 0) {
450 netif_tx_lock_bh(local->mdev);
451 ieee80211_configure_filter(local);
452 netif_tx_unlock_bh(local->mdev);
453
454 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
455 ieee80211_hw_config(local);
456 }
457 break;
458 case IEEE80211_IF_TYPE_STA:
459 case IEEE80211_IF_TYPE_IBSS:
460 sdata->u.sta.state = IEEE80211_DISABLED;
461 del_timer_sync(&sdata->u.sta.timer);
462 /*
463 * When we get here, the interface is marked down.
464 * Call synchronize_rcu() to wait for the RX path
465 * should it be using the interface and enqueuing
466 * frames at this very time on another CPU.
467 */
468 synchronize_rcu();
469 skb_queue_purge(&sdata->u.sta.skb_queue);
470
471 if (!local->ops->hw_scan &&
472 local->scan_dev == sdata->dev) {
473 local->sta_scanning = 0;
474 cancel_delayed_work(&local->scan_work);
475 }
476 flush_workqueue(local->hw.workqueue);
477 /* fall through */
478 default:
479 conf.if_id = dev->ifindex;
480 conf.type = sdata->type;
481 conf.mac_addr = dev->dev_addr;
482 /* disable all keys for as long as this netdev is down */
483 ieee80211_disable_keys(sdata);
484 local->ops->remove_interface(local_to_hw(local), &conf);
485 }
486
487 if (local->open_count == 0) {
488 if (netif_running(local->mdev))
489 dev_close(local->mdev);
490
491 if (local->apdev)
492 dev_close(local->apdev);
493
494 if (local->ops->stop)
495 local->ops->stop(local_to_hw(local));
496
497 tasklet_disable(&local->tx_pending_tasklet);
498 tasklet_disable(&local->tasklet);
499 }
500
501 return 0;
502 }
503
504 static void ieee80211_set_multicast_list(struct net_device *dev)
505 {
506 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
507 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
508 int allmulti, promisc, sdata_allmulti, sdata_promisc;
509
510 allmulti = !!(dev->flags & IFF_ALLMULTI);
511 promisc = !!(dev->flags & IFF_PROMISC);
512 sdata_allmulti = sdata->flags & IEEE80211_SDATA_ALLMULTI;
513 sdata_promisc = sdata->flags & IEEE80211_SDATA_PROMISC;
514
515 if (allmulti != sdata_allmulti) {
516 if (dev->flags & IFF_ALLMULTI)
517 local->iff_allmultis++;
518 else
519 local->iff_allmultis--;
520 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
521 }
522
523 if (promisc != sdata_promisc) {
524 if (dev->flags & IFF_PROMISC)
525 local->iff_promiscs++;
526 else
527 local->iff_promiscs--;
528 sdata->flags ^= IEEE80211_SDATA_PROMISC;
529 }
530
531 dev_mc_sync(local->mdev, dev);
532 }
533
534 static const struct header_ops ieee80211_header_ops = {
535 .create = eth_header,
536 .parse = header_parse_80211,
537 .rebuild = eth_rebuild_header,
538 .cache = eth_header_cache,
539 .cache_update = eth_header_cache_update,
540 };
541
542 /* Must not be called for mdev and apdev */
543 void ieee80211_if_setup(struct net_device *dev)
544 {
545 ether_setup(dev);
546 dev->header_ops = &ieee80211_header_ops;
547 dev->hard_start_xmit = ieee80211_subif_start_xmit;
548 dev->wireless_handlers = &ieee80211_iw_handler_def;
549 dev->set_multicast_list = ieee80211_set_multicast_list;
550 dev->change_mtu = ieee80211_change_mtu;
551 dev->open = ieee80211_open;
552 dev->stop = ieee80211_stop;
553 dev->destructor = ieee80211_if_free;
554 }
555
556 /* WDS specialties */
557
558 int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr)
559 {
560 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
561 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
562 struct sta_info *sta;
563 DECLARE_MAC_BUF(mac);
564
565 if (compare_ether_addr(remote_addr, sdata->u.wds.remote_addr) == 0)
566 return 0;
567
568 /* Create STA entry for the new peer */
569 sta = sta_info_add(local, dev, remote_addr, GFP_KERNEL);
570 if (!sta)
571 return -ENOMEM;
572 sta_info_put(sta);
573
574 /* Remove STA entry for the old peer */
575 sta = sta_info_get(local, sdata->u.wds.remote_addr);
576 if (sta) {
577 sta_info_free(sta);
578 sta_info_put(sta);
579 } else {
580 printk(KERN_DEBUG "%s: could not find STA entry for WDS link "
581 "peer %s\n",
582 dev->name, print_mac(mac, sdata->u.wds.remote_addr));
583 }
584
585 /* Update WDS link data */
586 memcpy(&sdata->u.wds.remote_addr, remote_addr, ETH_ALEN);
587
588 return 0;
589 }
590
591 /* everything else */
592
593 static int __ieee80211_if_config(struct net_device *dev,
594 struct sk_buff *beacon,
595 struct ieee80211_tx_control *control)
596 {
597 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
598 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
599 struct ieee80211_if_conf conf;
600
601 if (!local->ops->config_interface || !netif_running(dev))
602 return 0;
603
604 memset(&conf, 0, sizeof(conf));
605 conf.type = sdata->type;
606 if (sdata->type == IEEE80211_IF_TYPE_STA ||
607 sdata->type == IEEE80211_IF_TYPE_IBSS) {
608 conf.bssid = sdata->u.sta.bssid;
609 conf.ssid = sdata->u.sta.ssid;
610 conf.ssid_len = sdata->u.sta.ssid_len;
611 conf.generic_elem = sdata->u.sta.extra_ie;
612 conf.generic_elem_len = sdata->u.sta.extra_ie_len;
613 } else if (sdata->type == IEEE80211_IF_TYPE_AP) {
614 conf.ssid = sdata->u.ap.ssid;
615 conf.ssid_len = sdata->u.ap.ssid_len;
616 conf.generic_elem = sdata->u.ap.generic_elem;
617 conf.generic_elem_len = sdata->u.ap.generic_elem_len;
618 conf.beacon = beacon;
619 conf.beacon_control = control;
620 }
621 return local->ops->config_interface(local_to_hw(local),
622 dev->ifindex, &conf);
623 }
624
625 int ieee80211_if_config(struct net_device *dev)
626 {
627 return __ieee80211_if_config(dev, NULL, NULL);
628 }
629
630 int ieee80211_if_config_beacon(struct net_device *dev)
631 {
632 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
633 struct ieee80211_tx_control control;
634 struct sk_buff *skb;
635
636 if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
637 return 0;
638 skb = ieee80211_beacon_get(local_to_hw(local), dev->ifindex, &control);
639 if (!skb)
640 return -ENOMEM;
641 return __ieee80211_if_config(dev, skb, &control);
642 }
643
644 int ieee80211_hw_config(struct ieee80211_local *local)
645 {
646 struct ieee80211_hw_mode *mode;
647 struct ieee80211_channel *chan;
648 int ret = 0;
649
650 if (local->sta_scanning) {
651 chan = local->scan_channel;
652 mode = local->scan_hw_mode;
653 } else {
654 chan = local->oper_channel;
655 mode = local->oper_hw_mode;
656 }
657
658 local->hw.conf.channel = chan->chan;
659 local->hw.conf.channel_val = chan->val;
660 if (!local->hw.conf.power_level) {
661 local->hw.conf.power_level = chan->power_level;
662 } else {
663 local->hw.conf.power_level = min(chan->power_level,
664 local->hw.conf.power_level);
665 }
666 local->hw.conf.freq = chan->freq;
667 local->hw.conf.phymode = mode->mode;
668 local->hw.conf.antenna_max = chan->antenna_max;
669 local->hw.conf.chan = chan;
670 local->hw.conf.mode = mode;
671
672 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
673 printk(KERN_DEBUG "HW CONFIG: channel=%d freq=%d "
674 "phymode=%d\n", local->hw.conf.channel, local->hw.conf.freq,
675 local->hw.conf.phymode);
676 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
677
678 if (local->ops->config)
679 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
680
681 return ret;
682 }
683
684 void ieee80211_erp_info_change_notify(struct net_device *dev, u8 changes)
685 {
686 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
687 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
688 if (local->ops->erp_ie_changed)
689 local->ops->erp_ie_changed(local_to_hw(local), changes,
690 !!(sdata->flags & IEEE80211_SDATA_USE_PROTECTION),
691 !(sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE));
692 }
693
694 void ieee80211_reset_erp_info(struct net_device *dev)
695 {
696 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
697
698 sdata->flags &= ~(IEEE80211_SDATA_USE_PROTECTION |
699 IEEE80211_SDATA_SHORT_PREAMBLE);
700 ieee80211_erp_info_change_notify(dev,
701 IEEE80211_ERP_CHANGE_PROTECTION |
702 IEEE80211_ERP_CHANGE_PREAMBLE);
703 }
704
705 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
706 struct sk_buff *skb,
707 struct ieee80211_tx_status *status)
708 {
709 struct ieee80211_local *local = hw_to_local(hw);
710 struct ieee80211_tx_status *saved;
711 int tmp;
712
713 skb->dev = local->mdev;
714 saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC);
715 if (unlikely(!saved)) {
716 if (net_ratelimit())
717 printk(KERN_WARNING "%s: Not enough memory, "
718 "dropping tx status", skb->dev->name);
719 /* should be dev_kfree_skb_irq, but due to this function being
720 * named _irqsafe instead of just _irq we can't be sure that
721 * people won't call it from non-irq contexts */
722 dev_kfree_skb_any(skb);
723 return;
724 }
725 memcpy(saved, status, sizeof(struct ieee80211_tx_status));
726 /* copy pointer to saved status into skb->cb for use by tasklet */
727 memcpy(skb->cb, &saved, sizeof(saved));
728
729 skb->pkt_type = IEEE80211_TX_STATUS_MSG;
730 skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ?
731 &local->skb_queue : &local->skb_queue_unreliable, skb);
732 tmp = skb_queue_len(&local->skb_queue) +
733 skb_queue_len(&local->skb_queue_unreliable);
734 while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
735 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
736 memcpy(&saved, skb->cb, sizeof(saved));
737 kfree(saved);
738 dev_kfree_skb_irq(skb);
739 tmp--;
740 I802_DEBUG_INC(local->tx_status_drop);
741 }
742 tasklet_schedule(&local->tasklet);
743 }
744 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
745
746 static void ieee80211_tasklet_handler(unsigned long data)
747 {
748 struct ieee80211_local *local = (struct ieee80211_local *) data;
749 struct sk_buff *skb;
750 struct ieee80211_rx_status rx_status;
751 struct ieee80211_tx_status *tx_status;
752
753 while ((skb = skb_dequeue(&local->skb_queue)) ||
754 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
755 switch (skb->pkt_type) {
756 case IEEE80211_RX_MSG:
757 /* status is in skb->cb */
758 memcpy(&rx_status, skb->cb, sizeof(rx_status));
759 /* Clear skb->type in order to not confuse kernel
760 * netstack. */
761 skb->pkt_type = 0;
762 __ieee80211_rx(local_to_hw(local), skb, &rx_status);
763 break;
764 case IEEE80211_TX_STATUS_MSG:
765 /* get pointer to saved status out of skb->cb */
766 memcpy(&tx_status, skb->cb, sizeof(tx_status));
767 skb->pkt_type = 0;
768 ieee80211_tx_status(local_to_hw(local),
769 skb, tx_status);
770 kfree(tx_status);
771 break;
772 default: /* should never get here! */
773 printk(KERN_ERR "%s: Unknown message type (%d)\n",
774 wiphy_name(local->hw.wiphy), skb->pkt_type);
775 dev_kfree_skb(skb);
776 break;
777 }
778 }
779 }
780
781 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
782 * make a prepared TX frame (one that has been given to hw) to look like brand
783 * new IEEE 802.11 frame that is ready to go through TX processing again.
784 * Also, tx_packet_data in cb is restored from tx_control. */
785 static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
786 struct ieee80211_key *key,
787 struct sk_buff *skb,
788 struct ieee80211_tx_control *control)
789 {
790 int hdrlen, iv_len, mic_len;
791 struct ieee80211_tx_packet_data *pkt_data;
792
793 pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
794 pkt_data->ifindex = control->ifindex;
795 pkt_data->flags = 0;
796 if (control->flags & IEEE80211_TXCTL_REQ_TX_STATUS)
797 pkt_data->flags |= IEEE80211_TXPD_REQ_TX_STATUS;
798 if (control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT)
799 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
800 if (control->flags & IEEE80211_TXCTL_REQUEUE)
801 pkt_data->flags |= IEEE80211_TXPD_REQUEUE;
802 if (control->type == IEEE80211_IF_TYPE_MGMT)
803 pkt_data->flags |= IEEE80211_TXPD_MGMT_IFACE;
804 pkt_data->queue = control->queue;
805
806 hdrlen = ieee80211_get_hdrlen_from_skb(skb);
807
808 if (!key)
809 goto no_key;
810
811 switch (key->conf.alg) {
812 case ALG_WEP:
813 iv_len = WEP_IV_LEN;
814 mic_len = WEP_ICV_LEN;
815 break;
816 case ALG_TKIP:
817 iv_len = TKIP_IV_LEN;
818 mic_len = TKIP_ICV_LEN;
819 break;
820 case ALG_CCMP:
821 iv_len = CCMP_HDR_LEN;
822 mic_len = CCMP_MIC_LEN;
823 break;
824 default:
825 goto no_key;
826 }
827
828 if (skb->len >= mic_len &&
829 !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
830 skb_trim(skb, skb->len - mic_len);
831 if (skb->len >= iv_len && skb->len > hdrlen) {
832 memmove(skb->data + iv_len, skb->data, hdrlen);
833 skb_pull(skb, iv_len);
834 }
835
836 no_key:
837 {
838 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
839 u16 fc = le16_to_cpu(hdr->frame_control);
840 if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
841 fc &= ~IEEE80211_STYPE_QOS_DATA;
842 hdr->frame_control = cpu_to_le16(fc);
843 memmove(skb->data + 2, skb->data, hdrlen - 2);
844 skb_pull(skb, 2);
845 }
846 }
847 }
848
849 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
850 struct ieee80211_tx_status *status)
851 {
852 struct sk_buff *skb2;
853 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
854 struct ieee80211_local *local = hw_to_local(hw);
855 u16 frag, type;
856 u32 msg_type;
857 struct ieee80211_tx_status_rtap_hdr *rthdr;
858 struct ieee80211_sub_if_data *sdata;
859 int monitors;
860
861 if (!status) {
862 printk(KERN_ERR
863 "%s: ieee80211_tx_status called with NULL status\n",
864 wiphy_name(local->hw.wiphy));
865 dev_kfree_skb(skb);
866 return;
867 }
868
869 if (status->excessive_retries) {
870 struct sta_info *sta;
871 sta = sta_info_get(local, hdr->addr1);
872 if (sta) {
873 if (sta->flags & WLAN_STA_PS) {
874 /* The STA is in power save mode, so assume
875 * that this TX packet failed because of that.
876 */
877 status->excessive_retries = 0;
878 status->flags |= IEEE80211_TX_STATUS_TX_FILTERED;
879 }
880 sta_info_put(sta);
881 }
882 }
883
884 if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) {
885 struct sta_info *sta;
886 sta = sta_info_get(local, hdr->addr1);
887 if (sta) {
888 sta->tx_filtered_count++;
889
890 /* Clear the TX filter mask for this STA when sending
891 * the next packet. If the STA went to power save mode,
892 * this will happen when it is waking up for the next
893 * time. */
894 sta->clear_dst_mask = 1;
895
896 /* TODO: Is the WLAN_STA_PS flag always set here or is
897 * the race between RX and TX status causing some
898 * packets to be filtered out before 80211.o gets an
899 * update for PS status? This seems to be the case, so
900 * no changes are likely to be needed. */
901 if (sta->flags & WLAN_STA_PS &&
902 skb_queue_len(&sta->tx_filtered) <
903 STA_MAX_TX_BUFFER) {
904 ieee80211_remove_tx_extra(local, sta->key,
905 skb,
906 &status->control);
907 skb_queue_tail(&sta->tx_filtered, skb);
908 } else if (!(sta->flags & WLAN_STA_PS) &&
909 !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) {
910 /* Software retry the packet once */
911 status->control.flags |= IEEE80211_TXCTL_REQUEUE;
912 ieee80211_remove_tx_extra(local, sta->key,
913 skb,
914 &status->control);
915 dev_queue_xmit(skb);
916 } else {
917 if (net_ratelimit()) {
918 printk(KERN_DEBUG "%s: dropped TX "
919 "filtered frame queue_len=%d "
920 "PS=%d @%lu\n",
921 wiphy_name(local->hw.wiphy),
922 skb_queue_len(
923 &sta->tx_filtered),
924 !!(sta->flags & WLAN_STA_PS),
925 jiffies);
926 }
927 dev_kfree_skb(skb);
928 }
929 sta_info_put(sta);
930 return;
931 }
932 } else {
933 /* FIXME: STUPID to call this with both local and local->mdev */
934 rate_control_tx_status(local, local->mdev, skb, status);
935 }
936
937 ieee80211_led_tx(local, 0);
938
939 /* SNMP counters
940 * Fragments are passed to low-level drivers as separate skbs, so these
941 * are actually fragments, not frames. Update frame counters only for
942 * the first fragment of the frame. */
943
944 frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
945 type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
946
947 if (status->flags & IEEE80211_TX_STATUS_ACK) {
948 if (frag == 0) {
949 local->dot11TransmittedFrameCount++;
950 if (is_multicast_ether_addr(hdr->addr1))
951 local->dot11MulticastTransmittedFrameCount++;
952 if (status->retry_count > 0)
953 local->dot11RetryCount++;
954 if (status->retry_count > 1)
955 local->dot11MultipleRetryCount++;
956 }
957
958 /* This counter shall be incremented for an acknowledged MPDU
959 * with an individual address in the address 1 field or an MPDU
960 * with a multicast address in the address 1 field of type Data
961 * or Management. */
962 if (!is_multicast_ether_addr(hdr->addr1) ||
963 type == IEEE80211_FTYPE_DATA ||
964 type == IEEE80211_FTYPE_MGMT)
965 local->dot11TransmittedFragmentCount++;
966 } else {
967 if (frag == 0)
968 local->dot11FailedCount++;
969 }
970
971 msg_type = (status->flags & IEEE80211_TX_STATUS_ACK) ?
972 ieee80211_msg_tx_callback_ack : ieee80211_msg_tx_callback_fail;
973
974 /* this was a transmitted frame, but now we want to reuse it */
975 skb_orphan(skb);
976
977 if ((status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS) &&
978 local->apdev) {
979 if (local->monitors) {
980 skb2 = skb_clone(skb, GFP_ATOMIC);
981 } else {
982 skb2 = skb;
983 skb = NULL;
984 }
985
986 if (skb2)
987 /* Send frame to hostapd */
988 ieee80211_rx_mgmt(local, skb2, NULL, msg_type);
989
990 if (!skb)
991 return;
992 }
993
994 if (!local->monitors) {
995 dev_kfree_skb(skb);
996 return;
997 }
998
999 /* send frame to monitor interfaces now */
1000
1001 if (skb_headroom(skb) < sizeof(*rthdr)) {
1002 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
1003 dev_kfree_skb(skb);
1004 return;
1005 }
1006
1007 rthdr = (struct ieee80211_tx_status_rtap_hdr*)
1008 skb_push(skb, sizeof(*rthdr));
1009
1010 memset(rthdr, 0, sizeof(*rthdr));
1011 rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
1012 rthdr->hdr.it_present =
1013 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
1014 (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
1015
1016 if (!(status->flags & IEEE80211_TX_STATUS_ACK) &&
1017 !is_multicast_ether_addr(hdr->addr1))
1018 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
1019
1020 if ((status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) &&
1021 (status->control.flags & IEEE80211_TXCTL_USE_CTS_PROTECT))
1022 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
1023 else if (status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS)
1024 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
1025
1026 rthdr->data_retries = status->retry_count;
1027
1028 rcu_read_lock();
1029 monitors = local->monitors;
1030 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
1031 /*
1032 * Using the monitors counter is possibly racy, but
1033 * if the value is wrong we simply either clone the skb
1034 * once too much or forget sending it to one monitor iface
1035 * The latter case isn't nice but fixing the race is much
1036 * more complicated.
1037 */
1038 if (!monitors || !skb)
1039 goto out;
1040
1041 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
1042 if (!netif_running(sdata->dev))
1043 continue;
1044 monitors--;
1045 if (monitors)
1046 skb2 = skb_clone(skb, GFP_ATOMIC);
1047 else
1048 skb2 = NULL;
1049 skb->dev = sdata->dev;
1050 /* XXX: is this sufficient for BPF? */
1051 skb_set_mac_header(skb, 0);
1052 skb->ip_summed = CHECKSUM_UNNECESSARY;
1053 skb->pkt_type = PACKET_OTHERHOST;
1054 skb->protocol = htons(ETH_P_802_2);
1055 memset(skb->cb, 0, sizeof(skb->cb));
1056 netif_rx(skb);
1057 skb = skb2;
1058 }
1059 }
1060 out:
1061 rcu_read_unlock();
1062 if (skb)
1063 dev_kfree_skb(skb);
1064 }
1065 EXPORT_SYMBOL(ieee80211_tx_status);
1066
1067 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
1068 const struct ieee80211_ops *ops)
1069 {
1070 struct net_device *mdev;
1071 struct ieee80211_local *local;
1072 struct ieee80211_sub_if_data *sdata;
1073 int priv_size;
1074 struct wiphy *wiphy;
1075
1076 /* Ensure 32-byte alignment of our private data and hw private data.
1077 * We use the wiphy priv data for both our ieee80211_local and for
1078 * the driver's private data
1079 *
1080 * In memory it'll be like this:
1081 *
1082 * +-------------------------+
1083 * | struct wiphy |
1084 * +-------------------------+
1085 * | struct ieee80211_local |
1086 * +-------------------------+
1087 * | driver's private data |
1088 * +-------------------------+
1089 *
1090 */
1091 priv_size = ((sizeof(struct ieee80211_local) +
1092 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
1093 priv_data_len;
1094
1095 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
1096
1097 if (!wiphy)
1098 return NULL;
1099
1100 wiphy->privid = mac80211_wiphy_privid;
1101
1102 local = wiphy_priv(wiphy);
1103 local->hw.wiphy = wiphy;
1104
1105 local->hw.priv = (char *)local +
1106 ((sizeof(struct ieee80211_local) +
1107 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
1108
1109 BUG_ON(!ops->tx);
1110 BUG_ON(!ops->start);
1111 BUG_ON(!ops->stop);
1112 BUG_ON(!ops->config);
1113 BUG_ON(!ops->add_interface);
1114 BUG_ON(!ops->remove_interface);
1115 BUG_ON(!ops->configure_filter);
1116 local->ops = ops;
1117
1118 /* for now, mdev needs sub_if_data :/ */
1119 mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
1120 "wmaster%d", ether_setup);
1121 if (!mdev) {
1122 wiphy_free(wiphy);
1123 return NULL;
1124 }
1125
1126 sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
1127 mdev->ieee80211_ptr = &sdata->wdev;
1128 sdata->wdev.wiphy = wiphy;
1129
1130 local->hw.queues = 1; /* default */
1131
1132 local->mdev = mdev;
1133 local->rx_pre_handlers = ieee80211_rx_pre_handlers;
1134 local->rx_handlers = ieee80211_rx_handlers;
1135 local->tx_handlers = ieee80211_tx_handlers;
1136
1137 local->bridge_packets = 1;
1138
1139 local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1140 local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1141 local->short_retry_limit = 7;
1142 local->long_retry_limit = 4;
1143 local->hw.conf.radio_enabled = 1;
1144
1145 local->enabled_modes = ~0;
1146
1147 INIT_LIST_HEAD(&local->modes_list);
1148
1149 INIT_LIST_HEAD(&local->interfaces);
1150
1151 INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
1152 ieee80211_rx_bss_list_init(mdev);
1153
1154 sta_info_init(local);
1155
1156 mdev->hard_start_xmit = ieee80211_master_start_xmit;
1157 mdev->open = ieee80211_master_open;
1158 mdev->stop = ieee80211_master_stop;
1159 mdev->type = ARPHRD_IEEE80211;
1160 mdev->header_ops = &ieee80211_header_ops;
1161 mdev->set_multicast_list = ieee80211_master_set_multicast_list;
1162
1163 sdata->type = IEEE80211_IF_TYPE_AP;
1164 sdata->dev = mdev;
1165 sdata->local = local;
1166 sdata->u.ap.force_unicast_rateidx = -1;
1167 sdata->u.ap.max_ratectrl_rateidx = -1;
1168 ieee80211_if_sdata_init(sdata);
1169 /* no RCU needed since we're still during init phase */
1170 list_add_tail(&sdata->list, &local->interfaces);
1171
1172 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1173 (unsigned long)local);
1174 tasklet_disable(&local->tx_pending_tasklet);
1175
1176 tasklet_init(&local->tasklet,
1177 ieee80211_tasklet_handler,
1178 (unsigned long) local);
1179 tasklet_disable(&local->tasklet);
1180
1181 skb_queue_head_init(&local->skb_queue);
1182 skb_queue_head_init(&local->skb_queue_unreliable);
1183
1184 return local_to_hw(local);
1185 }
1186 EXPORT_SYMBOL(ieee80211_alloc_hw);
1187
1188 int ieee80211_register_hw(struct ieee80211_hw *hw)
1189 {
1190 struct ieee80211_local *local = hw_to_local(hw);
1191 const char *name;
1192 int result;
1193
1194 result = wiphy_register(local->hw.wiphy);
1195 if (result < 0)
1196 return result;
1197
1198 name = wiphy_dev(local->hw.wiphy)->driver->name;
1199 local->hw.workqueue = create_singlethread_workqueue(name);
1200 if (!local->hw.workqueue) {
1201 result = -ENOMEM;
1202 goto fail_workqueue;
1203 }
1204
1205 /*
1206 * The hardware needs headroom for sending the frame,
1207 * and we need some headroom for passing the frame to monitor
1208 * interfaces, but never both at the same time.
1209 */
1210 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1211 sizeof(struct ieee80211_tx_status_rtap_hdr));
1212
1213 debugfs_hw_add(local);
1214
1215 local->hw.conf.beacon_int = 1000;
1216
1217 local->wstats_flags |= local->hw.max_rssi ?
1218 IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID;
1219 local->wstats_flags |= local->hw.max_signal ?
1220 IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1221 local->wstats_flags |= local->hw.max_noise ?
1222 IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1223 if (local->hw.max_rssi < 0 || local->hw.max_noise < 0)
1224 local->wstats_flags |= IW_QUAL_DBM;
1225
1226 result = sta_info_start(local);
1227 if (result < 0)
1228 goto fail_sta_info;
1229
1230 rtnl_lock();
1231 result = dev_alloc_name(local->mdev, local->mdev->name);
1232 if (result < 0)
1233 goto fail_dev;
1234
1235 memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1236 SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1237
1238 result = register_netdevice(local->mdev);
1239 if (result < 0)
1240 goto fail_dev;
1241
1242 ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1243 ieee80211_if_set_type(local->mdev, IEEE80211_IF_TYPE_AP);
1244
1245 result = ieee80211_init_rate_ctrl_alg(local, NULL);
1246 if (result < 0) {
1247 printk(KERN_DEBUG "%s: Failed to initialize rate control "
1248 "algorithm\n", wiphy_name(local->hw.wiphy));
1249 goto fail_rate;
1250 }
1251
1252 result = ieee80211_wep_init(local);
1253
1254 if (result < 0) {
1255 printk(KERN_DEBUG "%s: Failed to initialize wep\n",
1256 wiphy_name(local->hw.wiphy));
1257 goto fail_wep;
1258 }
1259
1260 ieee80211_install_qdisc(local->mdev);
1261
1262 /* add one default STA interface */
1263 result = ieee80211_if_add(local->mdev, "wlan%d", NULL,
1264 IEEE80211_IF_TYPE_STA);
1265 if (result)
1266 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
1267 wiphy_name(local->hw.wiphy));
1268
1269 local->reg_state = IEEE80211_DEV_REGISTERED;
1270 rtnl_unlock();
1271
1272 ieee80211_led_init(local);
1273
1274 return 0;
1275
1276 fail_wep:
1277 rate_control_deinitialize(local);
1278 fail_rate:
1279 ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1280 unregister_netdevice(local->mdev);
1281 fail_dev:
1282 rtnl_unlock();
1283 sta_info_stop(local);
1284 fail_sta_info:
1285 debugfs_hw_del(local);
1286 destroy_workqueue(local->hw.workqueue);
1287 fail_workqueue:
1288 wiphy_unregister(local->hw.wiphy);
1289 return result;
1290 }
1291 EXPORT_SYMBOL(ieee80211_register_hw);
1292
1293 int ieee80211_register_hwmode(struct ieee80211_hw *hw,
1294 struct ieee80211_hw_mode *mode)
1295 {
1296 struct ieee80211_local *local = hw_to_local(hw);
1297 struct ieee80211_rate *rate;
1298 int i;
1299
1300 INIT_LIST_HEAD(&mode->list);
1301 list_add_tail(&mode->list, &local->modes_list);
1302
1303 local->hw_modes |= (1 << mode->mode);
1304 for (i = 0; i < mode->num_rates; i++) {
1305 rate = &(mode->rates[i]);
1306 rate->rate_inv = CHAN_UTIL_RATE_LCM / rate->rate;
1307 }
1308 ieee80211_prepare_rates(local, mode);
1309
1310 if (!local->oper_hw_mode) {
1311 /* Default to this mode */
1312 local->hw.conf.phymode = mode->mode;
1313 local->oper_hw_mode = local->scan_hw_mode = mode;
1314 local->oper_channel = local->scan_channel = &mode->channels[0];
1315 local->hw.conf.mode = local->oper_hw_mode;
1316 local->hw.conf.chan = local->oper_channel;
1317 }
1318
1319 if (!(hw->flags & IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED))
1320 ieee80211_set_default_regdomain(mode);
1321
1322 return 0;
1323 }
1324 EXPORT_SYMBOL(ieee80211_register_hwmode);
1325
1326 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1327 {
1328 struct ieee80211_local *local = hw_to_local(hw);
1329 struct ieee80211_sub_if_data *sdata, *tmp;
1330 int i;
1331
1332 tasklet_kill(&local->tx_pending_tasklet);
1333 tasklet_kill(&local->tasklet);
1334
1335 rtnl_lock();
1336
1337 BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED);
1338
1339 local->reg_state = IEEE80211_DEV_UNREGISTERED;
1340 if (local->apdev)
1341 ieee80211_if_del_mgmt(local);
1342
1343 /*
1344 * At this point, interface list manipulations are fine
1345 * because the driver cannot be handing us frames any
1346 * more and the tasklet is killed.
1347 */
1348
1349 /*
1350 * First, we remove all non-master interfaces. Do this because they
1351 * may have bss pointer dependency on the master, and when we free
1352 * the master these would be freed as well, breaking our list
1353 * iteration completely.
1354 */
1355 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1356 if (sdata->dev == local->mdev)
1357 continue;
1358 list_del(&sdata->list);
1359 __ieee80211_if_del(local, sdata);
1360 }
1361
1362 /* then, finally, remove the master interface */
1363 __ieee80211_if_del(local, IEEE80211_DEV_TO_SUB_IF(local->mdev));
1364
1365 rtnl_unlock();
1366
1367 ieee80211_rx_bss_list_deinit(local->mdev);
1368 ieee80211_clear_tx_pending(local);
1369 sta_info_stop(local);
1370 rate_control_deinitialize(local);
1371 debugfs_hw_del(local);
1372
1373 for (i = 0; i < NUM_IEEE80211_MODES; i++) {
1374 kfree(local->supp_rates[i]);
1375 kfree(local->basic_rates[i]);
1376 }
1377
1378 if (skb_queue_len(&local->skb_queue)
1379 || skb_queue_len(&local->skb_queue_unreliable))
1380 printk(KERN_WARNING "%s: skb_queue not empty\n",
1381 wiphy_name(local->hw.wiphy));
1382 skb_queue_purge(&local->skb_queue);
1383 skb_queue_purge(&local->skb_queue_unreliable);
1384
1385 destroy_workqueue(local->hw.workqueue);
1386 wiphy_unregister(local->hw.wiphy);
1387 ieee80211_wep_free(local);
1388 ieee80211_led_exit(local);
1389 }
1390 EXPORT_SYMBOL(ieee80211_unregister_hw);
1391
1392 void ieee80211_free_hw(struct ieee80211_hw *hw)
1393 {
1394 struct ieee80211_local *local = hw_to_local(hw);
1395
1396 ieee80211_if_free(local->mdev);
1397 wiphy_free(local->hw.wiphy);
1398 }
1399 EXPORT_SYMBOL(ieee80211_free_hw);
1400
1401 static int __init ieee80211_init(void)
1402 {
1403 struct sk_buff *skb;
1404 int ret;
1405
1406 BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb));
1407
1408 ret = ieee80211_wme_register();
1409 if (ret) {
1410 printk(KERN_DEBUG "ieee80211_init: failed to "
1411 "initialize WME (err=%d)\n", ret);
1412 return ret;
1413 }
1414
1415 ieee80211_debugfs_netdev_init();
1416 ieee80211_regdomain_init();
1417
1418 return 0;
1419 }
1420
1421 static void __exit ieee80211_exit(void)
1422 {
1423 ieee80211_wme_unregister();
1424 ieee80211_debugfs_netdev_exit();
1425 }
1426
1427
1428 subsys_initcall(ieee80211_init);
1429 module_exit(ieee80211_exit);
1430
1431 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1432 MODULE_LICENSE("GPL");
kernel-based virtual machine