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Merge git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6.24
[mirror_ubuntu-bionic-kernel.git] / net / mac80211 / ieee80211.c
CommitLineData
f0706e82
JB
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>
f0706e82 23#include <linux/bitmap.h>
881d966b 24#include <net/net_namespace.h>
f0706e82
JB
25#include <net/cfg80211.h>
26
f0706e82
JB
27#include "ieee80211_i.h"
28#include "ieee80211_rate.h"
29#include "wep.h"
f0706e82
JB
30#include "wme.h"
31#include "aes_ccm.h"
32#include "ieee80211_led.h"
e0eb6859 33#include "cfg.h"
e9f207f0
JB
34#include "debugfs.h"
35#include "debugfs_netdev.h"
f0706e82 36
b306f453
JB
37/*
38 * For seeing transmitted packets on monitor interfaces
39 * we have a radiotap header too.
40 */
41struct ieee80211_tx_status_rtap_hdr {
42 struct ieee80211_radiotap_header hdr;
43 __le16 tx_flags;
44 u8 data_retries;
45} __attribute__ ((packed));
46
b2c258fb 47/* common interface routines */
b306f453 48
b95cce35 49static int header_parse_80211(const struct sk_buff *skb, unsigned char *haddr)
b2c258fb
JB
50{
51 memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
52 return ETH_ALEN;
53}
f0706e82 54
4150c572
JB
55/* must be called under mdev tx lock */
56static void ieee80211_configure_filter(struct ieee80211_local *local)
57{
58 unsigned int changed_flags;
59 unsigned int new_flags = 0;
60
53918994 61 if (atomic_read(&local->iff_promiscs))
4150c572
JB
62 new_flags |= FIF_PROMISC_IN_BSS;
63
53918994 64 if (atomic_read(&local->iff_allmultis))
4150c572
JB
65 new_flags |= FIF_ALLMULTI;
66
67 if (local->monitors)
68 new_flags |= FIF_CONTROL |
69 FIF_OTHER_BSS |
70 FIF_BCN_PRBRESP_PROMISC;
71
72 changed_flags = local->filter_flags ^ new_flags;
73
74 /* be a bit nasty */
75 new_flags |= (1<<31);
76
77 local->ops->configure_filter(local_to_hw(local),
78 changed_flags, &new_flags,
79 local->mdev->mc_count,
80 local->mdev->mc_list);
81
82 WARN_ON(new_flags & (1<<31));
83
84 local->filter_flags = new_flags & ~(1<<31);
85}
86
b2c258fb 87/* master interface */
f0706e82 88
b2c258fb
JB
89static int ieee80211_master_open(struct net_device *dev)
90{
91 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
92 struct ieee80211_sub_if_data *sdata;
93 int res = -EOPNOTSUPP;
f0706e82 94
79010420
JB
95 /* we hold the RTNL here so can safely walk the list */
96 list_for_each_entry(sdata, &local->interfaces, list) {
b2c258fb
JB
97 if (sdata->dev != dev && netif_running(sdata->dev)) {
98 res = 0;
99 break;
100 }
101 }
b2c258fb
JB
102 return res;
103}
f0706e82 104
b2c258fb 105static int ieee80211_master_stop(struct net_device *dev)
f0706e82 106{
b2c258fb
JB
107 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
108 struct ieee80211_sub_if_data *sdata;
f0706e82 109
79010420
JB
110 /* we hold the RTNL here so can safely walk the list */
111 list_for_each_entry(sdata, &local->interfaces, list)
b2c258fb
JB
112 if (sdata->dev != dev && netif_running(sdata->dev))
113 dev_close(sdata->dev);
f0706e82 114
b2c258fb
JB
115 return 0;
116}
f0706e82 117
4150c572
JB
118static void ieee80211_master_set_multicast_list(struct net_device *dev)
119{
120 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
121
122 ieee80211_configure_filter(local);
123}
124
b2c258fb 125/* regular interfaces */
f0706e82 126
b2c258fb 127static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
f0706e82 128{
b2c258fb
JB
129 /* FIX: what would be proper limits for MTU?
130 * This interface uses 802.3 frames. */
131 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6) {
132 printk(KERN_WARNING "%s: invalid MTU %d\n",
133 dev->name, new_mtu);
134 return -EINVAL;
135 }
f0706e82 136
b2c258fb
JB
137#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
138 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
139#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
140 dev->mtu = new_mtu;
f0706e82
JB
141 return 0;
142}
143
b2c258fb
JB
144static inline int identical_mac_addr_allowed(int type1, int type2)
145{
146 return (type1 == IEEE80211_IF_TYPE_MNTR ||
147 type2 == IEEE80211_IF_TYPE_MNTR ||
148 (type1 == IEEE80211_IF_TYPE_AP &&
149 type2 == IEEE80211_IF_TYPE_WDS) ||
150 (type1 == IEEE80211_IF_TYPE_WDS &&
151 (type2 == IEEE80211_IF_TYPE_WDS ||
152 type2 == IEEE80211_IF_TYPE_AP)) ||
153 (type1 == IEEE80211_IF_TYPE_AP &&
154 type2 == IEEE80211_IF_TYPE_VLAN) ||
155 (type1 == IEEE80211_IF_TYPE_VLAN &&
156 (type2 == IEEE80211_IF_TYPE_AP ||
157 type2 == IEEE80211_IF_TYPE_VLAN)));
158}
f0706e82 159
b2c258fb 160static int ieee80211_open(struct net_device *dev)
e2ebc74d 161{
b2c258fb
JB
162 struct ieee80211_sub_if_data *sdata, *nsdata;
163 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
164 struct ieee80211_if_init_conf conf;
165 int res;
f0706e82 166
b2c258fb 167 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
0ec3ca44 168
79010420
JB
169 /* we hold the RTNL here so can safely walk the list */
170 list_for_each_entry(nsdata, &local->interfaces, list) {
b2c258fb 171 struct net_device *ndev = nsdata->dev;
e2ebc74d 172
b2c258fb 173 if (ndev != dev && ndev != local->mdev && netif_running(ndev) &&
0ec3ca44
JB
174 compare_ether_addr(dev->dev_addr, ndev->dev_addr) == 0) {
175 /*
176 * check whether it may have the same address
177 */
178 if (!identical_mac_addr_allowed(sdata->type,
79010420 179 nsdata->type))
0ec3ca44 180 return -ENOTUNIQ;
0ec3ca44
JB
181
182 /*
183 * can only add VLANs to enabled APs
184 */
185 if (sdata->type == IEEE80211_IF_TYPE_VLAN &&
186 nsdata->type == IEEE80211_IF_TYPE_AP &&
187 netif_running(nsdata->dev))
188 sdata->u.vlan.ap = nsdata;
b2c258fb
JB
189 }
190 }
f0706e82 191
0ec3ca44
JB
192 switch (sdata->type) {
193 case IEEE80211_IF_TYPE_WDS:
194 if (is_zero_ether_addr(sdata->u.wds.remote_addr))
195 return -ENOLINK;
196 break;
197 case IEEE80211_IF_TYPE_VLAN:
198 if (!sdata->u.vlan.ap)
199 return -ENOLINK;
200 break;
fb1c1cd6 201 case IEEE80211_IF_TYPE_AP:
fb1c1cd6
JB
202 case IEEE80211_IF_TYPE_STA:
203 case IEEE80211_IF_TYPE_MNTR:
204 case IEEE80211_IF_TYPE_IBSS:
205 /* no special treatment */
206 break;
a2897552
JB
207 case IEEE80211_IF_TYPE_INVALID:
208 /* cannot happen */
209 WARN_ON(1);
210 break;
0ec3ca44 211 }
f0706e82 212
b2c258fb
JB
213 if (local->open_count == 0) {
214 res = 0;
4150c572
JB
215 if (local->ops->start)
216 res = local->ops->start(local_to_hw(local));
217 if (res)
b2c258fb 218 return res;
8b393f1d 219 ieee80211_hw_config(local);
b2c258fb 220 }
f0706e82 221
4150c572 222 switch (sdata->type) {
0ec3ca44
JB
223 case IEEE80211_IF_TYPE_VLAN:
224 list_add(&sdata->u.vlan.list, &sdata->u.vlan.ap->u.ap.vlans);
225 /* no need to tell driver */
226 break;
4150c572
JB
227 case IEEE80211_IF_TYPE_MNTR:
228 /* must be before the call to ieee80211_configure_filter */
b2c258fb 229 local->monitors++;
4150c572
JB
230 if (local->monitors == 1) {
231 netif_tx_lock_bh(local->mdev);
232 ieee80211_configure_filter(local);
233 netif_tx_unlock_bh(local->mdev);
234
235 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
4150c572
JB
236 }
237 break;
238 case IEEE80211_IF_TYPE_STA:
239 case IEEE80211_IF_TYPE_IBSS:
240 sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET;
241 /* fall through */
242 default:
243 conf.if_id = dev->ifindex;
244 conf.type = sdata->type;
245 conf.mac_addr = dev->dev_addr;
246 res = local->ops->add_interface(local_to_hw(local), &conf);
247 if (res && !local->open_count && local->ops->stop)
248 local->ops->stop(local_to_hw(local));
249 if (res)
250 return res;
251
b2c258fb 252 ieee80211_if_config(dev);
d9430a32 253 ieee80211_reset_erp_info(dev);
11a843b7 254 ieee80211_enable_keys(sdata);
4150c572
JB
255
256 if (sdata->type == IEEE80211_IF_TYPE_STA &&
ddd3d2be 257 !(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME))
4150c572
JB
258 netif_carrier_off(dev);
259 else
260 netif_carrier_on(dev);
d9430a32 261 }
f0706e82 262
4150c572
JB
263 if (local->open_count == 0) {
264 res = dev_open(local->mdev);
265 WARN_ON(res);
4150c572
JB
266 tasklet_enable(&local->tx_pending_tasklet);
267 tasklet_enable(&local->tasklet);
268 }
269
c1428b3f
JB
270 /*
271 * set_multicast_list will be invoked by the networking core
272 * which will check whether any increments here were done in
273 * error and sync them down to the hardware as filter flags.
274 */
275 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
276 atomic_inc(&local->iff_allmultis);
277
278 if (sdata->flags & IEEE80211_SDATA_PROMISC)
279 atomic_inc(&local->iff_promiscs);
280
4150c572 281 local->open_count++;
f0706e82 282
b2c258fb 283 netif_start_queue(dev);
4150c572 284
b2c258fb 285 return 0;
f0706e82 286}
f0706e82 287
4150c572 288static int ieee80211_stop(struct net_device *dev)
f0706e82 289{
4150c572 290 struct ieee80211_sub_if_data *sdata;
f0706e82 291 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4150c572
JB
292 struct ieee80211_if_init_conf conf;
293
294 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
295
296 netif_stop_queue(dev);
297
c1428b3f
JB
298 /*
299 * Don't count this interface for promisc/allmulti while it
300 * is down. dev_mc_unsync() will invoke set_multicast_list
301 * on the master interface which will sync these down to the
302 * hardware as filter flags.
303 */
304 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
305 atomic_dec(&local->iff_allmultis);
306
307 if (sdata->flags & IEEE80211_SDATA_PROMISC)
308 atomic_dec(&local->iff_promiscs);
309
4150c572
JB
310 dev_mc_unsync(local->mdev, dev);
311
0ec3ca44
JB
312 /* down all dependent devices, that is VLANs */
313 if (sdata->type == IEEE80211_IF_TYPE_AP) {
314 struct ieee80211_sub_if_data *vlan, *tmp;
315
316 list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans,
317 u.vlan.list)
318 dev_close(vlan->dev);
319 WARN_ON(!list_empty(&sdata->u.ap.vlans));
320 }
321
4150c572 322 local->open_count--;
f0706e82 323
b2c258fb 324 switch (sdata->type) {
0ec3ca44
JB
325 case IEEE80211_IF_TYPE_VLAN:
326 list_del(&sdata->u.vlan.list);
327 sdata->u.vlan.ap = NULL;
328 /* no need to tell driver */
329 break;
4150c572
JB
330 case IEEE80211_IF_TYPE_MNTR:
331 local->monitors--;
332 if (local->monitors == 0) {
333 netif_tx_lock_bh(local->mdev);
334 ieee80211_configure_filter(local);
335 netif_tx_unlock_bh(local->mdev);
336
8b393f1d 337 local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
4150c572
JB
338 }
339 break;
b2c258fb
JB
340 case IEEE80211_IF_TYPE_STA:
341 case IEEE80211_IF_TYPE_IBSS:
342 sdata->u.sta.state = IEEE80211_DISABLED;
343 del_timer_sync(&sdata->u.sta.timer);
2a8a9a88 344 /*
79010420
JB
345 * When we get here, the interface is marked down.
346 * Call synchronize_rcu() to wait for the RX path
347 * should it be using the interface and enqueuing
348 * frames at this very time on another CPU.
2a8a9a88 349 */
79010420 350 synchronize_rcu();
b2c258fb 351 skb_queue_purge(&sdata->u.sta.skb_queue);
2a8a9a88 352
b2c258fb
JB
353 if (!local->ops->hw_scan &&
354 local->scan_dev == sdata->dev) {
355 local->sta_scanning = 0;
356 cancel_delayed_work(&local->scan_work);
357 }
358 flush_workqueue(local->hw.workqueue);
a10605e5
ZY
359
360 sdata->u.sta.flags &= ~IEEE80211_STA_PRIVACY_INVOKED;
361 kfree(sdata->u.sta.extra_ie);
362 sdata->u.sta.extra_ie = NULL;
363 sdata->u.sta.extra_ie_len = 0;
4150c572
JB
364 /* fall through */
365 default:
366 conf.if_id = dev->ifindex;
367 conf.type = sdata->type;
368 conf.mac_addr = dev->dev_addr;
11a843b7
JB
369 /* disable all keys for as long as this netdev is down */
370 ieee80211_disable_keys(sdata);
4150c572 371 local->ops->remove_interface(local_to_hw(local), &conf);
f0706e82
JB
372 }
373
b2c258fb
JB
374 if (local->open_count == 0) {
375 if (netif_running(local->mdev))
376 dev_close(local->mdev);
4150c572 377
b2c258fb
JB
378 if (local->ops->stop)
379 local->ops->stop(local_to_hw(local));
4150c572 380
b2c258fb
JB
381 tasklet_disable(&local->tx_pending_tasklet);
382 tasklet_disable(&local->tasklet);
383 }
b2c258fb 384
f0706e82
JB
385 return 0;
386}
387
f0706e82
JB
388static void ieee80211_set_multicast_list(struct net_device *dev)
389{
390 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
391 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4150c572 392 int allmulti, promisc, sdata_allmulti, sdata_promisc;
f0706e82 393
4150c572
JB
394 allmulti = !!(dev->flags & IFF_ALLMULTI);
395 promisc = !!(dev->flags & IFF_PROMISC);
b52f2198
JB
396 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
397 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
4150c572
JB
398
399 if (allmulti != sdata_allmulti) {
400 if (dev->flags & IFF_ALLMULTI)
53918994 401 atomic_inc(&local->iff_allmultis);
4150c572 402 else
53918994 403 atomic_dec(&local->iff_allmultis);
13262ffd 404 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
f0706e82 405 }
4150c572
JB
406
407 if (promisc != sdata_promisc) {
408 if (dev->flags & IFF_PROMISC)
53918994 409 atomic_inc(&local->iff_promiscs);
4150c572 410 else
53918994 411 atomic_dec(&local->iff_promiscs);
13262ffd 412 sdata->flags ^= IEEE80211_SDATA_PROMISC;
f0706e82 413 }
4150c572
JB
414
415 dev_mc_sync(local->mdev, dev);
f0706e82
JB
416}
417
3b04ddde
SH
418static const struct header_ops ieee80211_header_ops = {
419 .create = eth_header,
420 .parse = header_parse_80211,
421 .rebuild = eth_rebuild_header,
422 .cache = eth_header_cache,
423 .cache_update = eth_header_cache_update,
424};
425
f9d540ee 426/* Must not be called for mdev */
b2c258fb 427void ieee80211_if_setup(struct net_device *dev)
f0706e82 428{
b2c258fb 429 ether_setup(dev);
3b04ddde 430 dev->header_ops = &ieee80211_header_ops;
b2c258fb
JB
431 dev->hard_start_xmit = ieee80211_subif_start_xmit;
432 dev->wireless_handlers = &ieee80211_iw_handler_def;
433 dev->set_multicast_list = ieee80211_set_multicast_list;
434 dev->change_mtu = ieee80211_change_mtu;
b2c258fb
JB
435 dev->open = ieee80211_open;
436 dev->stop = ieee80211_stop;
b2c258fb
JB
437 dev->destructor = ieee80211_if_free;
438}
f0706e82 439
b2c258fb
JB
440/* WDS specialties */
441
442int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr)
443{
444 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
445 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
446 struct sta_info *sta;
0795af57 447 DECLARE_MAC_BUF(mac);
b2c258fb
JB
448
449 if (compare_ether_addr(remote_addr, sdata->u.wds.remote_addr) == 0)
450 return 0;
451
452 /* Create STA entry for the new peer */
453 sta = sta_info_add(local, dev, remote_addr, GFP_KERNEL);
454 if (!sta)
455 return -ENOMEM;
456 sta_info_put(sta);
457
458 /* Remove STA entry for the old peer */
459 sta = sta_info_get(local, sdata->u.wds.remote_addr);
460 if (sta) {
be8755e1 461 sta_info_free(sta);
b2c258fb 462 sta_info_put(sta);
b2c258fb
JB
463 } else {
464 printk(KERN_DEBUG "%s: could not find STA entry for WDS link "
0795af57
JP
465 "peer %s\n",
466 dev->name, print_mac(mac, sdata->u.wds.remote_addr));
b2c258fb
JB
467 }
468
469 /* Update WDS link data */
470 memcpy(&sdata->u.wds.remote_addr, remote_addr, ETH_ALEN);
471
472 return 0;
f0706e82 473}
f0706e82 474
b2c258fb
JB
475/* everything else */
476
b2c258fb
JB
477static int __ieee80211_if_config(struct net_device *dev,
478 struct sk_buff *beacon,
479 struct ieee80211_tx_control *control)
480{
481 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
482 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
483 struct ieee80211_if_conf conf;
b2c258fb
JB
484
485 if (!local->ops->config_interface || !netif_running(dev))
f0706e82 486 return 0;
f0706e82 487
b2c258fb 488 memset(&conf, 0, sizeof(conf));
4480f15c 489 conf.type = sdata->type;
b2c258fb
JB
490 if (sdata->type == IEEE80211_IF_TYPE_STA ||
491 sdata->type == IEEE80211_IF_TYPE_IBSS) {
4150c572 492 conf.bssid = sdata->u.sta.bssid;
b2c258fb
JB
493 conf.ssid = sdata->u.sta.ssid;
494 conf.ssid_len = sdata->u.sta.ssid_len;
b2c258fb
JB
495 } else if (sdata->type == IEEE80211_IF_TYPE_AP) {
496 conf.ssid = sdata->u.ap.ssid;
497 conf.ssid_len = sdata->u.ap.ssid_len;
b2c258fb
JB
498 conf.beacon = beacon;
499 conf.beacon_control = control;
f0706e82 500 }
b2c258fb
JB
501 return local->ops->config_interface(local_to_hw(local),
502 dev->ifindex, &conf);
f0706e82
JB
503}
504
b2c258fb
JB
505int ieee80211_if_config(struct net_device *dev)
506{
507 return __ieee80211_if_config(dev, NULL, NULL);
508}
f0706e82 509
b2c258fb 510int ieee80211_if_config_beacon(struct net_device *dev)
f0706e82 511{
f0706e82 512 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
b2c258fb
JB
513 struct ieee80211_tx_control control;
514 struct sk_buff *skb;
f0706e82 515
b2c258fb 516 if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
f0706e82 517 return 0;
b2c258fb
JB
518 skb = ieee80211_beacon_get(local_to_hw(local), dev->ifindex, &control);
519 if (!skb)
520 return -ENOMEM;
521 return __ieee80211_if_config(dev, skb, &control);
522}
f0706e82 523
b2c258fb
JB
524int ieee80211_hw_config(struct ieee80211_local *local)
525{
526 struct ieee80211_hw_mode *mode;
527 struct ieee80211_channel *chan;
528 int ret = 0;
f0706e82 529
b2c258fb
JB
530 if (local->sta_scanning) {
531 chan = local->scan_channel;
532 mode = local->scan_hw_mode;
533 } else {
534 chan = local->oper_channel;
535 mode = local->oper_hw_mode;
f0706e82
JB
536 }
537
b2c258fb
JB
538 local->hw.conf.channel = chan->chan;
539 local->hw.conf.channel_val = chan->val;
61609bc0
MB
540 if (!local->hw.conf.power_level) {
541 local->hw.conf.power_level = chan->power_level;
542 } else {
543 local->hw.conf.power_level = min(chan->power_level,
544 local->hw.conf.power_level);
545 }
b2c258fb
JB
546 local->hw.conf.freq = chan->freq;
547 local->hw.conf.phymode = mode->mode;
548 local->hw.conf.antenna_max = chan->antenna_max;
549 local->hw.conf.chan = chan;
550 local->hw.conf.mode = mode;
f0706e82 551
b2c258fb
JB
552#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
553 printk(KERN_DEBUG "HW CONFIG: channel=%d freq=%d "
554 "phymode=%d\n", local->hw.conf.channel, local->hw.conf.freq,
555 local->hw.conf.phymode);
556#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
557
f7c4daed 558 if (local->open_count)
b2c258fb 559 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
f0706e82 560
b2c258fb
JB
561 return ret;
562}
f0706e82 563
d9430a32
DD
564void ieee80211_erp_info_change_notify(struct net_device *dev, u8 changes)
565{
566 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
567 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
568 if (local->ops->erp_ie_changed)
569 local->ops->erp_ie_changed(local_to_hw(local), changes,
13262ffd
JS
570 !!(sdata->flags & IEEE80211_SDATA_USE_PROTECTION),
571 !(sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE));
d9430a32
DD
572}
573
574void ieee80211_reset_erp_info(struct net_device *dev)
575{
576 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
577
13262ffd
JS
578 sdata->flags &= ~(IEEE80211_SDATA_USE_PROTECTION |
579 IEEE80211_SDATA_SHORT_PREAMBLE);
d9430a32
DD
580 ieee80211_erp_info_change_notify(dev,
581 IEEE80211_ERP_CHANGE_PROTECTION |
582 IEEE80211_ERP_CHANGE_PREAMBLE);
583}
584
f0706e82
JB
585void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
586 struct sk_buff *skb,
587 struct ieee80211_tx_status *status)
588{
589 struct ieee80211_local *local = hw_to_local(hw);
590 struct ieee80211_tx_status *saved;
591 int tmp;
592
593 skb->dev = local->mdev;
594 saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC);
595 if (unlikely(!saved)) {
596 if (net_ratelimit())
597 printk(KERN_WARNING "%s: Not enough memory, "
598 "dropping tx status", skb->dev->name);
599 /* should be dev_kfree_skb_irq, but due to this function being
600 * named _irqsafe instead of just _irq we can't be sure that
601 * people won't call it from non-irq contexts */
602 dev_kfree_skb_any(skb);
603 return;
604 }
605 memcpy(saved, status, sizeof(struct ieee80211_tx_status));
606 /* copy pointer to saved status into skb->cb for use by tasklet */
607 memcpy(skb->cb, &saved, sizeof(saved));
608
609 skb->pkt_type = IEEE80211_TX_STATUS_MSG;
610 skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ?
611 &local->skb_queue : &local->skb_queue_unreliable, skb);
612 tmp = skb_queue_len(&local->skb_queue) +
613 skb_queue_len(&local->skb_queue_unreliable);
614 while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
615 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
616 memcpy(&saved, skb->cb, sizeof(saved));
617 kfree(saved);
618 dev_kfree_skb_irq(skb);
619 tmp--;
620 I802_DEBUG_INC(local->tx_status_drop);
621 }
622 tasklet_schedule(&local->tasklet);
623}
624EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
625
626static void ieee80211_tasklet_handler(unsigned long data)
627{
628 struct ieee80211_local *local = (struct ieee80211_local *) data;
629 struct sk_buff *skb;
630 struct ieee80211_rx_status rx_status;
631 struct ieee80211_tx_status *tx_status;
632
633 while ((skb = skb_dequeue(&local->skb_queue)) ||
634 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
635 switch (skb->pkt_type) {
636 case IEEE80211_RX_MSG:
637 /* status is in skb->cb */
638 memcpy(&rx_status, skb->cb, sizeof(rx_status));
639 /* Clear skb->type in order to not confuse kernel
640 * netstack. */
641 skb->pkt_type = 0;
642 __ieee80211_rx(local_to_hw(local), skb, &rx_status);
643 break;
644 case IEEE80211_TX_STATUS_MSG:
645 /* get pointer to saved status out of skb->cb */
646 memcpy(&tx_status, skb->cb, sizeof(tx_status));
647 skb->pkt_type = 0;
648 ieee80211_tx_status(local_to_hw(local),
649 skb, tx_status);
650 kfree(tx_status);
651 break;
652 default: /* should never get here! */
653 printk(KERN_ERR "%s: Unknown message type (%d)\n",
dd1cd4c6 654 wiphy_name(local->hw.wiphy), skb->pkt_type);
f0706e82
JB
655 dev_kfree_skb(skb);
656 break;
657 }
658 }
659}
660
f0706e82
JB
661/* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
662 * make a prepared TX frame (one that has been given to hw) to look like brand
663 * new IEEE 802.11 frame that is ready to go through TX processing again.
664 * Also, tx_packet_data in cb is restored from tx_control. */
665static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
666 struct ieee80211_key *key,
667 struct sk_buff *skb,
668 struct ieee80211_tx_control *control)
669{
670 int hdrlen, iv_len, mic_len;
671 struct ieee80211_tx_packet_data *pkt_data;
672
673 pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
674 pkt_data->ifindex = control->ifindex;
e8bf9649
JS
675 pkt_data->flags = 0;
676 if (control->flags & IEEE80211_TXCTL_REQ_TX_STATUS)
677 pkt_data->flags |= IEEE80211_TXPD_REQ_TX_STATUS;
678 if (control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT)
679 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
680 if (control->flags & IEEE80211_TXCTL_REQUEUE)
681 pkt_data->flags |= IEEE80211_TXPD_REQUEUE;
f0706e82
JB
682 pkt_data->queue = control->queue;
683
684 hdrlen = ieee80211_get_hdrlen_from_skb(skb);
685
686 if (!key)
687 goto no_key;
688
8f20fc24 689 switch (key->conf.alg) {
f0706e82
JB
690 case ALG_WEP:
691 iv_len = WEP_IV_LEN;
692 mic_len = WEP_ICV_LEN;
693 break;
694 case ALG_TKIP:
695 iv_len = TKIP_IV_LEN;
696 mic_len = TKIP_ICV_LEN;
697 break;
698 case ALG_CCMP:
699 iv_len = CCMP_HDR_LEN;
700 mic_len = CCMP_MIC_LEN;
701 break;
702 default:
703 goto no_key;
704 }
705
8f20fc24 706 if (skb->len >= mic_len &&
11a843b7 707 !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
f0706e82
JB
708 skb_trim(skb, skb->len - mic_len);
709 if (skb->len >= iv_len && skb->len > hdrlen) {
710 memmove(skb->data + iv_len, skb->data, hdrlen);
711 skb_pull(skb, iv_len);
712 }
713
714no_key:
715 {
716 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
717 u16 fc = le16_to_cpu(hdr->frame_control);
718 if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
719 fc &= ~IEEE80211_STYPE_QOS_DATA;
720 hdr->frame_control = cpu_to_le16(fc);
721 memmove(skb->data + 2, skb->data, hdrlen - 2);
722 skb_pull(skb, 2);
723 }
724 }
725}
726
f0706e82
JB
727void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
728 struct ieee80211_tx_status *status)
729{
730 struct sk_buff *skb2;
731 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
732 struct ieee80211_local *local = hw_to_local(hw);
733 u16 frag, type;
b306f453
JB
734 struct ieee80211_tx_status_rtap_hdr *rthdr;
735 struct ieee80211_sub_if_data *sdata;
736 int monitors;
f0706e82
JB
737
738 if (!status) {
739 printk(KERN_ERR
740 "%s: ieee80211_tx_status called with NULL status\n",
dd1cd4c6 741 wiphy_name(local->hw.wiphy));
f0706e82
JB
742 dev_kfree_skb(skb);
743 return;
744 }
745
746 if (status->excessive_retries) {
747 struct sta_info *sta;
748 sta = sta_info_get(local, hdr->addr1);
749 if (sta) {
750 if (sta->flags & WLAN_STA_PS) {
751 /* The STA is in power save mode, so assume
752 * that this TX packet failed because of that.
753 */
754 status->excessive_retries = 0;
755 status->flags |= IEEE80211_TX_STATUS_TX_FILTERED;
756 }
757 sta_info_put(sta);
758 }
759 }
760
761 if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) {
762 struct sta_info *sta;
763 sta = sta_info_get(local, hdr->addr1);
764 if (sta) {
765 sta->tx_filtered_count++;
766
767 /* Clear the TX filter mask for this STA when sending
768 * the next packet. If the STA went to power save mode,
769 * this will happen when it is waking up for the next
770 * time. */
771 sta->clear_dst_mask = 1;
772
773 /* TODO: Is the WLAN_STA_PS flag always set here or is
774 * the race between RX and TX status causing some
775 * packets to be filtered out before 80211.o gets an
776 * update for PS status? This seems to be the case, so
777 * no changes are likely to be needed. */
778 if (sta->flags & WLAN_STA_PS &&
779 skb_queue_len(&sta->tx_filtered) <
780 STA_MAX_TX_BUFFER) {
781 ieee80211_remove_tx_extra(local, sta->key,
782 skb,
783 &status->control);
784 skb_queue_tail(&sta->tx_filtered, skb);
785 } else if (!(sta->flags & WLAN_STA_PS) &&
786 !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) {
787 /* Software retry the packet once */
788 status->control.flags |= IEEE80211_TXCTL_REQUEUE;
789 ieee80211_remove_tx_extra(local, sta->key,
790 skb,
791 &status->control);
792 dev_queue_xmit(skb);
793 } else {
794 if (net_ratelimit()) {
795 printk(KERN_DEBUG "%s: dropped TX "
796 "filtered frame queue_len=%d "
797 "PS=%d @%lu\n",
dd1cd4c6 798 wiphy_name(local->hw.wiphy),
f0706e82
JB
799 skb_queue_len(
800 &sta->tx_filtered),
801 !!(sta->flags & WLAN_STA_PS),
802 jiffies);
803 }
804 dev_kfree_skb(skb);
805 }
806 sta_info_put(sta);
807 return;
808 }
809 } else {
810 /* FIXME: STUPID to call this with both local and local->mdev */
811 rate_control_tx_status(local, local->mdev, skb, status);
812 }
813
814 ieee80211_led_tx(local, 0);
815
816 /* SNMP counters
817 * Fragments are passed to low-level drivers as separate skbs, so these
818 * are actually fragments, not frames. Update frame counters only for
819 * the first fragment of the frame. */
820
821 frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
822 type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
823
824 if (status->flags & IEEE80211_TX_STATUS_ACK) {
825 if (frag == 0) {
826 local->dot11TransmittedFrameCount++;
827 if (is_multicast_ether_addr(hdr->addr1))
828 local->dot11MulticastTransmittedFrameCount++;
829 if (status->retry_count > 0)
830 local->dot11RetryCount++;
831 if (status->retry_count > 1)
832 local->dot11MultipleRetryCount++;
833 }
834
835 /* This counter shall be incremented for an acknowledged MPDU
836 * with an individual address in the address 1 field or an MPDU
837 * with a multicast address in the address 1 field of type Data
838 * or Management. */
839 if (!is_multicast_ether_addr(hdr->addr1) ||
840 type == IEEE80211_FTYPE_DATA ||
841 type == IEEE80211_FTYPE_MGMT)
842 local->dot11TransmittedFragmentCount++;
843 } else {
844 if (frag == 0)
845 local->dot11FailedCount++;
846 }
847
b306f453
JB
848 /* this was a transmitted frame, but now we want to reuse it */
849 skb_orphan(skb);
850
b306f453 851 if (!local->monitors) {
f0706e82
JB
852 dev_kfree_skb(skb);
853 return;
854 }
855
b306f453 856 /* send frame to monitor interfaces now */
f0706e82 857
b306f453
JB
858 if (skb_headroom(skb) < sizeof(*rthdr)) {
859 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
f0706e82
JB
860 dev_kfree_skb(skb);
861 return;
862 }
f0706e82 863
b306f453
JB
864 rthdr = (struct ieee80211_tx_status_rtap_hdr*)
865 skb_push(skb, sizeof(*rthdr));
866
867 memset(rthdr, 0, sizeof(*rthdr));
868 rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
869 rthdr->hdr.it_present =
870 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
871 (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
872
873 if (!(status->flags & IEEE80211_TX_STATUS_ACK) &&
874 !is_multicast_ether_addr(hdr->addr1))
875 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
876
877 if ((status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) &&
878 (status->control.flags & IEEE80211_TXCTL_USE_CTS_PROTECT))
879 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
880 else if (status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS)
881 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
882
883 rthdr->data_retries = status->retry_count;
884
79010420 885 rcu_read_lock();
b306f453 886 monitors = local->monitors;
79010420 887 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
b306f453
JB
888 /*
889 * Using the monitors counter is possibly racy, but
890 * if the value is wrong we simply either clone the skb
891 * once too much or forget sending it to one monitor iface
892 * The latter case isn't nice but fixing the race is much
893 * more complicated.
894 */
895 if (!monitors || !skb)
896 goto out;
897
898 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
899 if (!netif_running(sdata->dev))
900 continue;
901 monitors--;
902 if (monitors)
79010420 903 skb2 = skb_clone(skb, GFP_ATOMIC);
b306f453
JB
904 else
905 skb2 = NULL;
906 skb->dev = sdata->dev;
907 /* XXX: is this sufficient for BPF? */
908 skb_set_mac_header(skb, 0);
909 skb->ip_summed = CHECKSUM_UNNECESSARY;
910 skb->pkt_type = PACKET_OTHERHOST;
911 skb->protocol = htons(ETH_P_802_2);
912 memset(skb->cb, 0, sizeof(skb->cb));
913 netif_rx(skb);
914 skb = skb2;
b306f453
JB
915 }
916 }
917 out:
79010420 918 rcu_read_unlock();
b306f453
JB
919 if (skb)
920 dev_kfree_skb(skb);
f0706e82
JB
921}
922EXPORT_SYMBOL(ieee80211_tx_status);
923
f0706e82
JB
924struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
925 const struct ieee80211_ops *ops)
926{
927 struct net_device *mdev;
928 struct ieee80211_local *local;
929 struct ieee80211_sub_if_data *sdata;
930 int priv_size;
931 struct wiphy *wiphy;
932
933 /* Ensure 32-byte alignment of our private data and hw private data.
934 * We use the wiphy priv data for both our ieee80211_local and for
935 * the driver's private data
936 *
937 * In memory it'll be like this:
938 *
939 * +-------------------------+
940 * | struct wiphy |
941 * +-------------------------+
942 * | struct ieee80211_local |
943 * +-------------------------+
944 * | driver's private data |
945 * +-------------------------+
946 *
947 */
948 priv_size = ((sizeof(struct ieee80211_local) +
949 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
950 priv_data_len;
951
952 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
953
954 if (!wiphy)
955 return NULL;
956
957 wiphy->privid = mac80211_wiphy_privid;
958
959 local = wiphy_priv(wiphy);
960 local->hw.wiphy = wiphy;
961
962 local->hw.priv = (char *)local +
963 ((sizeof(struct ieee80211_local) +
964 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
965
4480f15c 966 BUG_ON(!ops->tx);
4150c572
JB
967 BUG_ON(!ops->start);
968 BUG_ON(!ops->stop);
4480f15c
JB
969 BUG_ON(!ops->config);
970 BUG_ON(!ops->add_interface);
4150c572
JB
971 BUG_ON(!ops->remove_interface);
972 BUG_ON(!ops->configure_filter);
f0706e82
JB
973 local->ops = ops;
974
975 /* for now, mdev needs sub_if_data :/ */
976 mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
977 "wmaster%d", ether_setup);
978 if (!mdev) {
979 wiphy_free(wiphy);
980 return NULL;
981 }
982
983 sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
984 mdev->ieee80211_ptr = &sdata->wdev;
985 sdata->wdev.wiphy = wiphy;
986
987 local->hw.queues = 1; /* default */
988
989 local->mdev = mdev;
990 local->rx_pre_handlers = ieee80211_rx_pre_handlers;
991 local->rx_handlers = ieee80211_rx_handlers;
992 local->tx_handlers = ieee80211_tx_handlers;
993
994 local->bridge_packets = 1;
995
996 local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
997 local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
998 local->short_retry_limit = 7;
999 local->long_retry_limit = 4;
1000 local->hw.conf.radio_enabled = 1;
f0706e82 1001
b708e610 1002 local->enabled_modes = ~0;
f0706e82
JB
1003
1004 INIT_LIST_HEAD(&local->modes_list);
1005
79010420 1006 INIT_LIST_HEAD(&local->interfaces);
f0706e82
JB
1007
1008 INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
f0706e82
JB
1009 ieee80211_rx_bss_list_init(mdev);
1010
1011 sta_info_init(local);
1012
1013 mdev->hard_start_xmit = ieee80211_master_start_xmit;
1014 mdev->open = ieee80211_master_open;
1015 mdev->stop = ieee80211_master_stop;
1016 mdev->type = ARPHRD_IEEE80211;
3b04ddde 1017 mdev->header_ops = &ieee80211_header_ops;
4150c572 1018 mdev->set_multicast_list = ieee80211_master_set_multicast_list;
f0706e82
JB
1019
1020 sdata->type = IEEE80211_IF_TYPE_AP;
1021 sdata->dev = mdev;
1022 sdata->local = local;
1023 sdata->u.ap.force_unicast_rateidx = -1;
1024 sdata->u.ap.max_ratectrl_rateidx = -1;
1025 ieee80211_if_sdata_init(sdata);
79010420
JB
1026 /* no RCU needed since we're still during init phase */
1027 list_add_tail(&sdata->list, &local->interfaces);
f0706e82
JB
1028
1029 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1030 (unsigned long)local);
1031 tasklet_disable(&local->tx_pending_tasklet);
1032
1033 tasklet_init(&local->tasklet,
1034 ieee80211_tasklet_handler,
1035 (unsigned long) local);
1036 tasklet_disable(&local->tasklet);
1037
1038 skb_queue_head_init(&local->skb_queue);
1039 skb_queue_head_init(&local->skb_queue_unreliable);
1040
1041 return local_to_hw(local);
1042}
1043EXPORT_SYMBOL(ieee80211_alloc_hw);
1044
1045int ieee80211_register_hw(struct ieee80211_hw *hw)
1046{
1047 struct ieee80211_local *local = hw_to_local(hw);
1048 const char *name;
1049 int result;
1050
1051 result = wiphy_register(local->hw.wiphy);
1052 if (result < 0)
1053 return result;
1054
1055 name = wiphy_dev(local->hw.wiphy)->driver->name;
1056 local->hw.workqueue = create_singlethread_workqueue(name);
1057 if (!local->hw.workqueue) {
1058 result = -ENOMEM;
1059 goto fail_workqueue;
1060 }
1061
b306f453
JB
1062 /*
1063 * The hardware needs headroom for sending the frame,
1064 * and we need some headroom for passing the frame to monitor
1065 * interfaces, but never both at the same time.
1066 */
33ccad35
JB
1067 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1068 sizeof(struct ieee80211_tx_status_rtap_hdr));
b306f453 1069
e9f207f0
JB
1070 debugfs_hw_add(local);
1071
f0706e82
JB
1072 local->hw.conf.beacon_int = 1000;
1073
1074 local->wstats_flags |= local->hw.max_rssi ?
1075 IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID;
1076 local->wstats_flags |= local->hw.max_signal ?
1077 IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1078 local->wstats_flags |= local->hw.max_noise ?
1079 IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1080 if (local->hw.max_rssi < 0 || local->hw.max_noise < 0)
1081 local->wstats_flags |= IW_QUAL_DBM;
1082
1083 result = sta_info_start(local);
1084 if (result < 0)
1085 goto fail_sta_info;
1086
1087 rtnl_lock();
1088 result = dev_alloc_name(local->mdev, local->mdev->name);
1089 if (result < 0)
1090 goto fail_dev;
1091
1092 memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1093 SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1094
1095 result = register_netdevice(local->mdev);
1096 if (result < 0)
1097 goto fail_dev;
1098
e9f207f0 1099 ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
5b2812e9 1100 ieee80211_if_set_type(local->mdev, IEEE80211_IF_TYPE_AP);
e9f207f0 1101
830f9038
JB
1102 result = ieee80211_init_rate_ctrl_alg(local,
1103 hw->rate_control_algorithm);
f0706e82
JB
1104 if (result < 0) {
1105 printk(KERN_DEBUG "%s: Failed to initialize rate control "
dd1cd4c6 1106 "algorithm\n", wiphy_name(local->hw.wiphy));
f0706e82
JB
1107 goto fail_rate;
1108 }
1109
1110 result = ieee80211_wep_init(local);
1111
1112 if (result < 0) {
1113 printk(KERN_DEBUG "%s: Failed to initialize wep\n",
dd1cd4c6 1114 wiphy_name(local->hw.wiphy));
f0706e82
JB
1115 goto fail_wep;
1116 }
1117
1118 ieee80211_install_qdisc(local->mdev);
1119
1120 /* add one default STA interface */
1121 result = ieee80211_if_add(local->mdev, "wlan%d", NULL,
1122 IEEE80211_IF_TYPE_STA);
1123 if (result)
1124 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
dd1cd4c6 1125 wiphy_name(local->hw.wiphy));
f0706e82
JB
1126
1127 local->reg_state = IEEE80211_DEV_REGISTERED;
1128 rtnl_unlock();
1129
1130 ieee80211_led_init(local);
1131
1132 return 0;
1133
1134fail_wep:
1135 rate_control_deinitialize(local);
1136fail_rate:
e9f207f0 1137 ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
f0706e82
JB
1138 unregister_netdevice(local->mdev);
1139fail_dev:
1140 rtnl_unlock();
1141 sta_info_stop(local);
1142fail_sta_info:
e9f207f0 1143 debugfs_hw_del(local);
f0706e82
JB
1144 destroy_workqueue(local->hw.workqueue);
1145fail_workqueue:
1146 wiphy_unregister(local->hw.wiphy);
1147 return result;
1148}
1149EXPORT_SYMBOL(ieee80211_register_hw);
1150
1151int ieee80211_register_hwmode(struct ieee80211_hw *hw,
1152 struct ieee80211_hw_mode *mode)
1153{
1154 struct ieee80211_local *local = hw_to_local(hw);
1155 struct ieee80211_rate *rate;
1156 int i;
1157
1158 INIT_LIST_HEAD(&mode->list);
1159 list_add_tail(&mode->list, &local->modes_list);
1160
1161 local->hw_modes |= (1 << mode->mode);
1162 for (i = 0; i < mode->num_rates; i++) {
1163 rate = &(mode->rates[i]);
1164 rate->rate_inv = CHAN_UTIL_RATE_LCM / rate->rate;
1165 }
1166 ieee80211_prepare_rates(local, mode);
1167
1168 if (!local->oper_hw_mode) {
1169 /* Default to this mode */
1170 local->hw.conf.phymode = mode->mode;
1171 local->oper_hw_mode = local->scan_hw_mode = mode;
1172 local->oper_channel = local->scan_channel = &mode->channels[0];
1173 local->hw.conf.mode = local->oper_hw_mode;
1174 local->hw.conf.chan = local->oper_channel;
1175 }
1176
1177 if (!(hw->flags & IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED))
fd8bacc9 1178 ieee80211_set_default_regdomain(mode);
f0706e82
JB
1179
1180 return 0;
1181}
1182EXPORT_SYMBOL(ieee80211_register_hwmode);
1183
1184void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1185{
1186 struct ieee80211_local *local = hw_to_local(hw);
1187 struct ieee80211_sub_if_data *sdata, *tmp;
f0706e82
JB
1188 int i;
1189
1190 tasklet_kill(&local->tx_pending_tasklet);
1191 tasklet_kill(&local->tasklet);
1192
1193 rtnl_lock();
1194
1195 BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED);
1196
1197 local->reg_state = IEEE80211_DEV_UNREGISTERED;
f0706e82 1198
79010420
JB
1199 /*
1200 * At this point, interface list manipulations are fine
1201 * because the driver cannot be handing us frames any
1202 * more and the tasklet is killed.
1203 */
5b2812e9
JB
1204
1205 /*
1206 * First, we remove all non-master interfaces. Do this because they
1207 * may have bss pointer dependency on the master, and when we free
1208 * the master these would be freed as well, breaking our list
1209 * iteration completely.
1210 */
1211 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1212 if (sdata->dev == local->mdev)
1213 continue;
1214 list_del(&sdata->list);
f0706e82 1215 __ieee80211_if_del(local, sdata);
5b2812e9
JB
1216 }
1217
1218 /* then, finally, remove the master interface */
1219 __ieee80211_if_del(local, IEEE80211_DEV_TO_SUB_IF(local->mdev));
f0706e82
JB
1220
1221 rtnl_unlock();
1222
f0706e82
JB
1223 ieee80211_rx_bss_list_deinit(local->mdev);
1224 ieee80211_clear_tx_pending(local);
1225 sta_info_stop(local);
1226 rate_control_deinitialize(local);
e9f207f0 1227 debugfs_hw_del(local);
f0706e82
JB
1228
1229 for (i = 0; i < NUM_IEEE80211_MODES; i++) {
1230 kfree(local->supp_rates[i]);
1231 kfree(local->basic_rates[i]);
1232 }
1233
1234 if (skb_queue_len(&local->skb_queue)
1235 || skb_queue_len(&local->skb_queue_unreliable))
1236 printk(KERN_WARNING "%s: skb_queue not empty\n",
dd1cd4c6 1237 wiphy_name(local->hw.wiphy));
f0706e82
JB
1238 skb_queue_purge(&local->skb_queue);
1239 skb_queue_purge(&local->skb_queue_unreliable);
1240
1241 destroy_workqueue(local->hw.workqueue);
1242 wiphy_unregister(local->hw.wiphy);
1243 ieee80211_wep_free(local);
1244 ieee80211_led_exit(local);
1245}
1246EXPORT_SYMBOL(ieee80211_unregister_hw);
1247
1248void ieee80211_free_hw(struct ieee80211_hw *hw)
1249{
1250 struct ieee80211_local *local = hw_to_local(hw);
1251
1252 ieee80211_if_free(local->mdev);
1253 wiphy_free(local->hw.wiphy);
1254}
1255EXPORT_SYMBOL(ieee80211_free_hw);
1256
f0706e82
JB
1257static int __init ieee80211_init(void)
1258{
1259 struct sk_buff *skb;
1260 int ret;
1261
1262 BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb));
1263
ac71c691
JB
1264#ifdef CONFIG_MAC80211_RCSIMPLE
1265 ret = ieee80211_rate_control_register(&mac80211_rcsimple);
1266 if (ret)
1267 return ret;
1268#endif
1269
f0706e82
JB
1270 ret = ieee80211_wme_register();
1271 if (ret) {
ac71c691
JB
1272#ifdef CONFIG_MAC80211_RCSIMPLE
1273 ieee80211_rate_control_unregister(&mac80211_rcsimple);
1274#endif
f0706e82
JB
1275 printk(KERN_DEBUG "ieee80211_init: failed to "
1276 "initialize WME (err=%d)\n", ret);
1277 return ret;
1278 }
1279
e9f207f0 1280 ieee80211_debugfs_netdev_init();
fd8bacc9 1281 ieee80211_regdomain_init();
e9f207f0 1282
f0706e82
JB
1283 return 0;
1284}
1285
f0706e82
JB
1286static void __exit ieee80211_exit(void)
1287{
ac71c691
JB
1288#ifdef CONFIG_MAC80211_RCSIMPLE
1289 ieee80211_rate_control_unregister(&mac80211_rcsimple);
1290#endif
1291
f0706e82 1292 ieee80211_wme_unregister();
e9f207f0 1293 ieee80211_debugfs_netdev_exit();
f0706e82
JB
1294}
1295
1296
ca9938fe 1297subsys_initcall(ieee80211_init);
f0706e82
JB
1298module_exit(ieee80211_exit);
1299
1300MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1301MODULE_LICENSE("GPL");