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[MAC80211]: fix add_interface monitor mode behaviour
[deliverable/linux.git] / net / mac80211 / ieee80211.c
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/cfg80211.h>
25
26 #include "ieee80211_common.h"
27 #include "ieee80211_i.h"
28 #include "ieee80211_rate.h"
29 #include "wep.h"
30 #include "wme.h"
31 #include "aes_ccm.h"
32 #include "ieee80211_led.h"
33 #include "ieee80211_cfg.h"
34 #include "debugfs.h"
35 #include "debugfs_netdev.h"
36
37 /*
38 * For seeing transmitted packets on monitor interfaces
39 * we have a radiotap header too.
40 */
41 struct ieee80211_tx_status_rtap_hdr {
42 struct ieee80211_radiotap_header hdr;
43 __le16 tx_flags;
44 u8 data_retries;
45 } __attribute__ ((packed));
46
47 /* common interface routines */
48
49 static struct net_device_stats *ieee80211_get_stats(struct net_device *dev)
50 {
51 struct ieee80211_sub_if_data *sdata;
52 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
53 return &(sdata->stats);
54 }
55
56 static int header_parse_80211(struct sk_buff *skb, unsigned char *haddr)
57 {
58 memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
59 return ETH_ALEN;
60 }
61
62 /* master interface */
63
64 static int ieee80211_master_open(struct net_device *dev)
65 {
66 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
67 struct ieee80211_sub_if_data *sdata;
68 int res = -EOPNOTSUPP;
69
70 read_lock(&local->sub_if_lock);
71 list_for_each_entry(sdata, &local->sub_if_list, list) {
72 if (sdata->dev != dev && netif_running(sdata->dev)) {
73 res = 0;
74 break;
75 }
76 }
77 read_unlock(&local->sub_if_lock);
78 return res;
79 }
80
81 static int ieee80211_master_stop(struct net_device *dev)
82 {
83 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
84 struct ieee80211_sub_if_data *sdata;
85
86 read_lock(&local->sub_if_lock);
87 list_for_each_entry(sdata, &local->sub_if_list, list)
88 if (sdata->dev != dev && netif_running(sdata->dev))
89 dev_close(sdata->dev);
90 read_unlock(&local->sub_if_lock);
91
92 return 0;
93 }
94
95 /* management interface */
96
97 static void
98 ieee80211_fill_frame_info(struct ieee80211_local *local,
99 struct ieee80211_frame_info *fi,
100 struct ieee80211_rx_status *status)
101 {
102 if (status) {
103 struct timespec ts;
104 struct ieee80211_rate *rate;
105
106 jiffies_to_timespec(jiffies, &ts);
107 fi->hosttime = cpu_to_be64((u64) ts.tv_sec * 1000000 +
108 ts.tv_nsec / 1000);
109 fi->mactime = cpu_to_be64(status->mactime);
110 switch (status->phymode) {
111 case MODE_IEEE80211A:
112 fi->phytype = htonl(ieee80211_phytype_ofdm_dot11_a);
113 break;
114 case MODE_IEEE80211B:
115 fi->phytype = htonl(ieee80211_phytype_dsss_dot11_b);
116 break;
117 case MODE_IEEE80211G:
118 fi->phytype = htonl(ieee80211_phytype_pbcc_dot11_g);
119 break;
120 case MODE_ATHEROS_TURBO:
121 fi->phytype =
122 htonl(ieee80211_phytype_dsss_dot11_turbo);
123 break;
124 default:
125 fi->phytype = htonl(0xAAAAAAAA);
126 break;
127 }
128 fi->channel = htonl(status->channel);
129 rate = ieee80211_get_rate(local, status->phymode,
130 status->rate);
131 if (rate) {
132 fi->datarate = htonl(rate->rate);
133 if (rate->flags & IEEE80211_RATE_PREAMBLE2) {
134 if (status->rate == rate->val)
135 fi->preamble = htonl(2); /* long */
136 else if (status->rate == rate->val2)
137 fi->preamble = htonl(1); /* short */
138 } else
139 fi->preamble = htonl(0);
140 } else {
141 fi->datarate = htonl(0);
142 fi->preamble = htonl(0);
143 }
144
145 fi->antenna = htonl(status->antenna);
146 fi->priority = htonl(0xffffffff); /* no clue */
147 fi->ssi_type = htonl(ieee80211_ssi_raw);
148 fi->ssi_signal = htonl(status->ssi);
149 fi->ssi_noise = 0x00000000;
150 fi->encoding = 0;
151 } else {
152 /* clear everything because we really don't know.
153 * the msg_type field isn't present on monitor frames
154 * so we don't know whether it will be present or not,
155 * but it's ok to not clear it since it'll be assigned
156 * anyway */
157 memset(fi, 0, sizeof(*fi) - sizeof(fi->msg_type));
158
159 fi->ssi_type = htonl(ieee80211_ssi_none);
160 }
161 fi->version = htonl(IEEE80211_FI_VERSION);
162 fi->length = cpu_to_be32(sizeof(*fi) - sizeof(fi->msg_type));
163 }
164
165 /* this routine is actually not just for this, but also
166 * for pushing fake 'management' frames into userspace.
167 * it shall be replaced by a netlink-based system. */
168 void
169 ieee80211_rx_mgmt(struct ieee80211_local *local, struct sk_buff *skb,
170 struct ieee80211_rx_status *status, u32 msg_type)
171 {
172 struct ieee80211_frame_info *fi;
173 const size_t hlen = sizeof(struct ieee80211_frame_info);
174 struct ieee80211_sub_if_data *sdata;
175
176 skb->dev = local->apdev;
177
178 sdata = IEEE80211_DEV_TO_SUB_IF(local->apdev);
179
180 if (skb_headroom(skb) < hlen) {
181 I802_DEBUG_INC(local->rx_expand_skb_head);
182 if (pskb_expand_head(skb, hlen, 0, GFP_ATOMIC)) {
183 dev_kfree_skb(skb);
184 return;
185 }
186 }
187
188 fi = (struct ieee80211_frame_info *) skb_push(skb, hlen);
189
190 ieee80211_fill_frame_info(local, fi, status);
191 fi->msg_type = htonl(msg_type);
192
193 sdata->stats.rx_packets++;
194 sdata->stats.rx_bytes += skb->len;
195
196 skb_set_mac_header(skb, 0);
197 skb->ip_summed = CHECKSUM_UNNECESSARY;
198 skb->pkt_type = PACKET_OTHERHOST;
199 skb->protocol = htons(ETH_P_802_2);
200 memset(skb->cb, 0, sizeof(skb->cb));
201 netif_rx(skb);
202 }
203
204 int ieee80211_radar_status(struct ieee80211_hw *hw, int channel,
205 int radar, int radar_type)
206 {
207 struct sk_buff *skb;
208 struct ieee80211_radar_info *msg;
209 struct ieee80211_local *local = hw_to_local(hw);
210
211 if (!local->apdev)
212 return 0;
213
214 skb = dev_alloc_skb(sizeof(struct ieee80211_frame_info) +
215 sizeof(struct ieee80211_radar_info));
216
217 if (!skb)
218 return -ENOMEM;
219 skb_reserve(skb, sizeof(struct ieee80211_frame_info));
220
221 msg = (struct ieee80211_radar_info *)
222 skb_put(skb, sizeof(struct ieee80211_radar_info));
223 msg->channel = channel;
224 msg->radar = radar;
225 msg->radar_type = radar_type;
226
227 ieee80211_rx_mgmt(local, skb, NULL, ieee80211_msg_radar);
228 return 0;
229 }
230 EXPORT_SYMBOL(ieee80211_radar_status);
231
232 void ieee80211_key_threshold_notify(struct net_device *dev,
233 struct ieee80211_key *key,
234 struct sta_info *sta)
235 {
236 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
237 struct sk_buff *skb;
238 struct ieee80211_msg_key_notification *msg;
239
240 /* if no one will get it anyway, don't even allocate it.
241 * unlikely because this is only relevant for APs
242 * where the device must be open... */
243 if (unlikely(!local->apdev))
244 return;
245
246 skb = dev_alloc_skb(sizeof(struct ieee80211_frame_info) +
247 sizeof(struct ieee80211_msg_key_notification));
248 if (!skb)
249 return;
250
251 skb_reserve(skb, sizeof(struct ieee80211_frame_info));
252 msg = (struct ieee80211_msg_key_notification *)
253 skb_put(skb, sizeof(struct ieee80211_msg_key_notification));
254 msg->tx_rx_count = key->tx_rx_count;
255 memcpy(msg->ifname, dev->name, IFNAMSIZ);
256 if (sta)
257 memcpy(msg->addr, sta->addr, ETH_ALEN);
258 else
259 memset(msg->addr, 0xff, ETH_ALEN);
260
261 key->tx_rx_count = 0;
262
263 ieee80211_rx_mgmt(local, skb, NULL,
264 ieee80211_msg_key_threshold_notification);
265 }
266
267 static int ieee80211_mgmt_open(struct net_device *dev)
268 {
269 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
270
271 if (!netif_running(local->mdev))
272 return -EOPNOTSUPP;
273 return 0;
274 }
275
276 static int ieee80211_mgmt_stop(struct net_device *dev)
277 {
278 return 0;
279 }
280
281 static int ieee80211_change_mtu_apdev(struct net_device *dev, int new_mtu)
282 {
283 /* FIX: what would be proper limits for MTU?
284 * This interface uses 802.11 frames. */
285 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN) {
286 printk(KERN_WARNING "%s: invalid MTU %d\n",
287 dev->name, new_mtu);
288 return -EINVAL;
289 }
290
291 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
292 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
293 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
294 dev->mtu = new_mtu;
295 return 0;
296 }
297
298 void ieee80211_if_mgmt_setup(struct net_device *dev)
299 {
300 ether_setup(dev);
301 dev->hard_start_xmit = ieee80211_mgmt_start_xmit;
302 dev->change_mtu = ieee80211_change_mtu_apdev;
303 dev->get_stats = ieee80211_get_stats;
304 dev->open = ieee80211_mgmt_open;
305 dev->stop = ieee80211_mgmt_stop;
306 dev->type = ARPHRD_IEEE80211_PRISM;
307 dev->hard_header_parse = header_parse_80211;
308 dev->uninit = ieee80211_if_reinit;
309 dev->destructor = ieee80211_if_free;
310 }
311
312 /* regular interfaces */
313
314 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
315 {
316 /* FIX: what would be proper limits for MTU?
317 * This interface uses 802.3 frames. */
318 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6) {
319 printk(KERN_WARNING "%s: invalid MTU %d\n",
320 dev->name, new_mtu);
321 return -EINVAL;
322 }
323
324 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
325 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
326 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
327 dev->mtu = new_mtu;
328 return 0;
329 }
330
331 static inline int identical_mac_addr_allowed(int type1, int type2)
332 {
333 return (type1 == IEEE80211_IF_TYPE_MNTR ||
334 type2 == IEEE80211_IF_TYPE_MNTR ||
335 (type1 == IEEE80211_IF_TYPE_AP &&
336 type2 == IEEE80211_IF_TYPE_WDS) ||
337 (type1 == IEEE80211_IF_TYPE_WDS &&
338 (type2 == IEEE80211_IF_TYPE_WDS ||
339 type2 == IEEE80211_IF_TYPE_AP)) ||
340 (type1 == IEEE80211_IF_TYPE_AP &&
341 type2 == IEEE80211_IF_TYPE_VLAN) ||
342 (type1 == IEEE80211_IF_TYPE_VLAN &&
343 (type2 == IEEE80211_IF_TYPE_AP ||
344 type2 == IEEE80211_IF_TYPE_VLAN)));
345 }
346
347 /* Check if running monitor interfaces should go to a "soft monitor" mode
348 * and switch them if necessary. */
349 static inline void ieee80211_start_soft_monitor(struct ieee80211_local *local)
350 {
351 struct ieee80211_if_init_conf conf;
352
353 if (local->open_count && local->open_count == local->monitors &&
354 !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER) &&
355 local->ops->remove_interface) {
356 conf.if_id = -1;
357 conf.type = IEEE80211_IF_TYPE_MNTR;
358 conf.mac_addr = NULL;
359 local->ops->remove_interface(local_to_hw(local), &conf);
360 }
361 }
362
363 /* Check if running monitor interfaces should go to a "hard monitor" mode
364 * and switch them if necessary. */
365 static void ieee80211_start_hard_monitor(struct ieee80211_local *local)
366 {
367 struct ieee80211_if_init_conf conf;
368
369 if (local->open_count && local->open_count == local->monitors &&
370 !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
371 conf.if_id = -1;
372 conf.type = IEEE80211_IF_TYPE_MNTR;
373 conf.mac_addr = NULL;
374 local->ops->add_interface(local_to_hw(local), &conf);
375 }
376 }
377
378 static void ieee80211_if_open(struct net_device *dev)
379 {
380 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
381
382 switch (sdata->type) {
383 case IEEE80211_IF_TYPE_STA:
384 case IEEE80211_IF_TYPE_IBSS:
385 sdata->u.sta.prev_bssid_set = 0;
386 break;
387 }
388 }
389
390 static int ieee80211_open(struct net_device *dev)
391 {
392 struct ieee80211_sub_if_data *sdata, *nsdata;
393 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
394 struct ieee80211_if_init_conf conf;
395 int res;
396
397 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
398 read_lock(&local->sub_if_lock);
399 list_for_each_entry(nsdata, &local->sub_if_list, list) {
400 struct net_device *ndev = nsdata->dev;
401
402 if (ndev != dev && ndev != local->mdev && netif_running(ndev) &&
403 compare_ether_addr(dev->dev_addr, ndev->dev_addr) == 0 &&
404 !identical_mac_addr_allowed(sdata->type, nsdata->type)) {
405 read_unlock(&local->sub_if_lock);
406 return -ENOTUNIQ;
407 }
408 }
409 read_unlock(&local->sub_if_lock);
410
411 if (sdata->type == IEEE80211_IF_TYPE_WDS &&
412 is_zero_ether_addr(sdata->u.wds.remote_addr))
413 return -ENOLINK;
414
415 if (sdata->type == IEEE80211_IF_TYPE_MNTR && local->open_count &&
416 !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
417 /* run the interface in a "soft monitor" mode */
418 local->monitors++;
419 local->open_count++;
420 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
421 return 0;
422 }
423 ieee80211_if_open(dev);
424 ieee80211_start_soft_monitor(local);
425
426 conf.if_id = dev->ifindex;
427 conf.type = sdata->type;
428 if (sdata->type == IEEE80211_IF_TYPE_MNTR)
429 conf.mac_addr = NULL;
430 else
431 conf.mac_addr = dev->dev_addr;
432 res = local->ops->add_interface(local_to_hw(local), &conf);
433 if (res) {
434 if (sdata->type == IEEE80211_IF_TYPE_MNTR)
435 ieee80211_start_hard_monitor(local);
436 return res;
437 }
438
439 if (local->open_count == 0) {
440 res = 0;
441 tasklet_enable(&local->tx_pending_tasklet);
442 tasklet_enable(&local->tasklet);
443 if (local->ops->open)
444 res = local->ops->open(local_to_hw(local));
445 if (res == 0) {
446 res = dev_open(local->mdev);
447 if (res) {
448 if (local->ops->stop)
449 local->ops->stop(local_to_hw(local));
450 } else {
451 res = ieee80211_hw_config(local);
452 if (res && local->ops->stop)
453 local->ops->stop(local_to_hw(local));
454 else if (!res && local->apdev)
455 dev_open(local->apdev);
456 }
457 }
458 if (res) {
459 if (local->ops->remove_interface)
460 local->ops->remove_interface(local_to_hw(local),
461 &conf);
462 return res;
463 }
464 }
465 local->open_count++;
466
467 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
468 local->monitors++;
469 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
470 } else {
471 ieee80211_if_config(dev);
472 ieee80211_reset_erp_info(dev);
473 }
474
475 if (sdata->type == IEEE80211_IF_TYPE_STA &&
476 !local->user_space_mlme)
477 netif_carrier_off(dev);
478 else
479 netif_carrier_on(dev);
480
481 netif_start_queue(dev);
482 return 0;
483 }
484
485 static void ieee80211_if_shutdown(struct net_device *dev)
486 {
487 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
488 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
489
490 ASSERT_RTNL();
491 switch (sdata->type) {
492 case IEEE80211_IF_TYPE_STA:
493 case IEEE80211_IF_TYPE_IBSS:
494 sdata->u.sta.state = IEEE80211_DISABLED;
495 del_timer_sync(&sdata->u.sta.timer);
496 skb_queue_purge(&sdata->u.sta.skb_queue);
497 if (!local->ops->hw_scan &&
498 local->scan_dev == sdata->dev) {
499 local->sta_scanning = 0;
500 cancel_delayed_work(&local->scan_work);
501 }
502 flush_workqueue(local->hw.workqueue);
503 break;
504 }
505 }
506
507 static int ieee80211_stop(struct net_device *dev)
508 {
509 struct ieee80211_sub_if_data *sdata;
510 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
511
512 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
513
514 if (sdata->type == IEEE80211_IF_TYPE_MNTR &&
515 local->open_count > 1 &&
516 !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
517 /* remove "soft monitor" interface */
518 local->open_count--;
519 local->monitors--;
520 if (!local->monitors)
521 local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
522 return 0;
523 }
524
525 netif_stop_queue(dev);
526 ieee80211_if_shutdown(dev);
527
528 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
529 local->monitors--;
530 if (!local->monitors)
531 local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
532 }
533
534 local->open_count--;
535 if (local->open_count == 0) {
536 if (netif_running(local->mdev))
537 dev_close(local->mdev);
538 if (local->apdev)
539 dev_close(local->apdev);
540 if (local->ops->stop)
541 local->ops->stop(local_to_hw(local));
542 tasklet_disable(&local->tx_pending_tasklet);
543 tasklet_disable(&local->tasklet);
544 }
545 if (local->ops->remove_interface) {
546 struct ieee80211_if_init_conf conf;
547
548 conf.if_id = dev->ifindex;
549 conf.type = sdata->type;
550 conf.mac_addr = dev->dev_addr;
551 local->ops->remove_interface(local_to_hw(local), &conf);
552 }
553
554 ieee80211_start_hard_monitor(local);
555
556 return 0;
557 }
558
559 enum netif_tx_lock_class {
560 TX_LOCK_NORMAL,
561 TX_LOCK_MASTER,
562 };
563
564 static inline void netif_tx_lock_nested(struct net_device *dev, int subclass)
565 {
566 spin_lock_nested(&dev->_xmit_lock, subclass);
567 dev->xmit_lock_owner = smp_processor_id();
568 }
569
570 static void ieee80211_set_multicast_list(struct net_device *dev)
571 {
572 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
573 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
574 unsigned short flags;
575
576 netif_tx_lock_nested(local->mdev, TX_LOCK_MASTER);
577 if (((dev->flags & IFF_ALLMULTI) != 0) ^ (sdata->allmulti != 0)) {
578 if (sdata->allmulti) {
579 sdata->allmulti = 0;
580 local->iff_allmultis--;
581 } else {
582 sdata->allmulti = 1;
583 local->iff_allmultis++;
584 }
585 }
586 if (((dev->flags & IFF_PROMISC) != 0) ^ (sdata->promisc != 0)) {
587 if (sdata->promisc) {
588 sdata->promisc = 0;
589 local->iff_promiscs--;
590 } else {
591 sdata->promisc = 1;
592 local->iff_promiscs++;
593 }
594 }
595 if (dev->mc_count != sdata->mc_count) {
596 local->mc_count = local->mc_count - sdata->mc_count +
597 dev->mc_count;
598 sdata->mc_count = dev->mc_count;
599 }
600 if (local->ops->set_multicast_list) {
601 flags = local->mdev->flags;
602 if (local->iff_allmultis)
603 flags |= IFF_ALLMULTI;
604 if (local->iff_promiscs)
605 flags |= IFF_PROMISC;
606 read_lock(&local->sub_if_lock);
607 local->ops->set_multicast_list(local_to_hw(local), flags,
608 local->mc_count);
609 read_unlock(&local->sub_if_lock);
610 }
611 netif_tx_unlock(local->mdev);
612 }
613
614 /* Must not be called for mdev and apdev */
615 void ieee80211_if_setup(struct net_device *dev)
616 {
617 ether_setup(dev);
618 dev->hard_start_xmit = ieee80211_subif_start_xmit;
619 dev->wireless_handlers = &ieee80211_iw_handler_def;
620 dev->set_multicast_list = ieee80211_set_multicast_list;
621 dev->change_mtu = ieee80211_change_mtu;
622 dev->get_stats = ieee80211_get_stats;
623 dev->open = ieee80211_open;
624 dev->stop = ieee80211_stop;
625 dev->uninit = ieee80211_if_reinit;
626 dev->destructor = ieee80211_if_free;
627 }
628
629 /* WDS specialties */
630
631 int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr)
632 {
633 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
634 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
635 struct sta_info *sta;
636
637 if (compare_ether_addr(remote_addr, sdata->u.wds.remote_addr) == 0)
638 return 0;
639
640 /* Create STA entry for the new peer */
641 sta = sta_info_add(local, dev, remote_addr, GFP_KERNEL);
642 if (!sta)
643 return -ENOMEM;
644 sta_info_put(sta);
645
646 /* Remove STA entry for the old peer */
647 sta = sta_info_get(local, sdata->u.wds.remote_addr);
648 if (sta) {
649 sta_info_free(sta);
650 sta_info_put(sta);
651 } else {
652 printk(KERN_DEBUG "%s: could not find STA entry for WDS link "
653 "peer " MAC_FMT "\n",
654 dev->name, MAC_ARG(sdata->u.wds.remote_addr));
655 }
656
657 /* Update WDS link data */
658 memcpy(&sdata->u.wds.remote_addr, remote_addr, ETH_ALEN);
659
660 return 0;
661 }
662
663 /* everything else */
664
665 static int __ieee80211_if_config(struct net_device *dev,
666 struct sk_buff *beacon,
667 struct ieee80211_tx_control *control)
668 {
669 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
670 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
671 struct ieee80211_if_conf conf;
672 static u8 scan_bssid[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
673
674 if (!local->ops->config_interface || !netif_running(dev))
675 return 0;
676
677 memset(&conf, 0, sizeof(conf));
678 conf.type = sdata->type;
679 if (sdata->type == IEEE80211_IF_TYPE_STA ||
680 sdata->type == IEEE80211_IF_TYPE_IBSS) {
681 if (local->sta_scanning &&
682 local->scan_dev == dev)
683 conf.bssid = scan_bssid;
684 else
685 conf.bssid = sdata->u.sta.bssid;
686 conf.ssid = sdata->u.sta.ssid;
687 conf.ssid_len = sdata->u.sta.ssid_len;
688 conf.generic_elem = sdata->u.sta.extra_ie;
689 conf.generic_elem_len = sdata->u.sta.extra_ie_len;
690 } else if (sdata->type == IEEE80211_IF_TYPE_AP) {
691 conf.ssid = sdata->u.ap.ssid;
692 conf.ssid_len = sdata->u.ap.ssid_len;
693 conf.generic_elem = sdata->u.ap.generic_elem;
694 conf.generic_elem_len = sdata->u.ap.generic_elem_len;
695 conf.beacon = beacon;
696 conf.beacon_control = control;
697 }
698 return local->ops->config_interface(local_to_hw(local),
699 dev->ifindex, &conf);
700 }
701
702 int ieee80211_if_config(struct net_device *dev)
703 {
704 return __ieee80211_if_config(dev, NULL, NULL);
705 }
706
707 int ieee80211_if_config_beacon(struct net_device *dev)
708 {
709 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
710 struct ieee80211_tx_control control;
711 struct sk_buff *skb;
712
713 if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
714 return 0;
715 skb = ieee80211_beacon_get(local_to_hw(local), dev->ifindex, &control);
716 if (!skb)
717 return -ENOMEM;
718 return __ieee80211_if_config(dev, skb, &control);
719 }
720
721 int ieee80211_hw_config(struct ieee80211_local *local)
722 {
723 struct ieee80211_hw_mode *mode;
724 struct ieee80211_channel *chan;
725 int ret = 0;
726
727 if (local->sta_scanning) {
728 chan = local->scan_channel;
729 mode = local->scan_hw_mode;
730 } else {
731 chan = local->oper_channel;
732 mode = local->oper_hw_mode;
733 }
734
735 local->hw.conf.channel = chan->chan;
736 local->hw.conf.channel_val = chan->val;
737 local->hw.conf.power_level = chan->power_level;
738 local->hw.conf.freq = chan->freq;
739 local->hw.conf.phymode = mode->mode;
740 local->hw.conf.antenna_max = chan->antenna_max;
741 local->hw.conf.chan = chan;
742 local->hw.conf.mode = mode;
743
744 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
745 printk(KERN_DEBUG "HW CONFIG: channel=%d freq=%d "
746 "phymode=%d\n", local->hw.conf.channel, local->hw.conf.freq,
747 local->hw.conf.phymode);
748 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
749
750 if (local->ops->config)
751 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
752
753 return ret;
754 }
755
756 void ieee80211_erp_info_change_notify(struct net_device *dev, u8 changes)
757 {
758 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
759 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
760 if (local->ops->erp_ie_changed)
761 local->ops->erp_ie_changed(local_to_hw(local), changes,
762 sdata->use_protection,
763 !sdata->short_preamble);
764 }
765
766 void ieee80211_reset_erp_info(struct net_device *dev)
767 {
768 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
769
770 sdata->short_preamble = 0;
771 sdata->use_protection = 0;
772 ieee80211_erp_info_change_notify(dev,
773 IEEE80211_ERP_CHANGE_PROTECTION |
774 IEEE80211_ERP_CHANGE_PREAMBLE);
775 }
776
777 struct dev_mc_list *ieee80211_get_mc_list_item(struct ieee80211_hw *hw,
778 struct dev_mc_list *prev,
779 void **ptr)
780 {
781 struct ieee80211_local *local = hw_to_local(hw);
782 struct ieee80211_sub_if_data *sdata = *ptr;
783 struct dev_mc_list *mc;
784
785 if (!prev) {
786 WARN_ON(sdata);
787 sdata = NULL;
788 }
789 if (!prev || !prev->next) {
790 if (sdata)
791 sdata = list_entry(sdata->list.next,
792 struct ieee80211_sub_if_data, list);
793 else
794 sdata = list_entry(local->sub_if_list.next,
795 struct ieee80211_sub_if_data, list);
796 if (&sdata->list != &local->sub_if_list)
797 mc = sdata->dev->mc_list;
798 else
799 mc = NULL;
800 } else
801 mc = prev->next;
802
803 *ptr = sdata;
804 return mc;
805 }
806 EXPORT_SYMBOL(ieee80211_get_mc_list_item);
807
808 static void ieee80211_stat_refresh(unsigned long data)
809 {
810 struct ieee80211_local *local = (struct ieee80211_local *) data;
811 struct sta_info *sta;
812 struct ieee80211_sub_if_data *sdata;
813
814 if (!local->stat_time)
815 return;
816
817 /* go through all stations */
818 read_lock_bh(&local->sta_lock);
819 list_for_each_entry(sta, &local->sta_list, list) {
820 sta->channel_use = (sta->channel_use_raw / local->stat_time) /
821 CHAN_UTIL_PER_10MS;
822 sta->channel_use_raw = 0;
823 }
824 read_unlock_bh(&local->sta_lock);
825
826 /* go through all subinterfaces */
827 read_lock(&local->sub_if_lock);
828 list_for_each_entry(sdata, &local->sub_if_list, list) {
829 sdata->channel_use = (sdata->channel_use_raw /
830 local->stat_time) / CHAN_UTIL_PER_10MS;
831 sdata->channel_use_raw = 0;
832 }
833 read_unlock(&local->sub_if_lock);
834
835 /* hardware interface */
836 local->channel_use = (local->channel_use_raw /
837 local->stat_time) / CHAN_UTIL_PER_10MS;
838 local->channel_use_raw = 0;
839
840 local->stat_timer.expires = jiffies + HZ * local->stat_time / 100;
841 add_timer(&local->stat_timer);
842 }
843
844 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
845 struct sk_buff *skb,
846 struct ieee80211_tx_status *status)
847 {
848 struct ieee80211_local *local = hw_to_local(hw);
849 struct ieee80211_tx_status *saved;
850 int tmp;
851
852 skb->dev = local->mdev;
853 saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC);
854 if (unlikely(!saved)) {
855 if (net_ratelimit())
856 printk(KERN_WARNING "%s: Not enough memory, "
857 "dropping tx status", skb->dev->name);
858 /* should be dev_kfree_skb_irq, but due to this function being
859 * named _irqsafe instead of just _irq we can't be sure that
860 * people won't call it from non-irq contexts */
861 dev_kfree_skb_any(skb);
862 return;
863 }
864 memcpy(saved, status, sizeof(struct ieee80211_tx_status));
865 /* copy pointer to saved status into skb->cb for use by tasklet */
866 memcpy(skb->cb, &saved, sizeof(saved));
867
868 skb->pkt_type = IEEE80211_TX_STATUS_MSG;
869 skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ?
870 &local->skb_queue : &local->skb_queue_unreliable, skb);
871 tmp = skb_queue_len(&local->skb_queue) +
872 skb_queue_len(&local->skb_queue_unreliable);
873 while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
874 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
875 memcpy(&saved, skb->cb, sizeof(saved));
876 kfree(saved);
877 dev_kfree_skb_irq(skb);
878 tmp--;
879 I802_DEBUG_INC(local->tx_status_drop);
880 }
881 tasklet_schedule(&local->tasklet);
882 }
883 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
884
885 static void ieee80211_tasklet_handler(unsigned long data)
886 {
887 struct ieee80211_local *local = (struct ieee80211_local *) data;
888 struct sk_buff *skb;
889 struct ieee80211_rx_status rx_status;
890 struct ieee80211_tx_status *tx_status;
891
892 while ((skb = skb_dequeue(&local->skb_queue)) ||
893 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
894 switch (skb->pkt_type) {
895 case IEEE80211_RX_MSG:
896 /* status is in skb->cb */
897 memcpy(&rx_status, skb->cb, sizeof(rx_status));
898 /* Clear skb->type in order to not confuse kernel
899 * netstack. */
900 skb->pkt_type = 0;
901 __ieee80211_rx(local_to_hw(local), skb, &rx_status);
902 break;
903 case IEEE80211_TX_STATUS_MSG:
904 /* get pointer to saved status out of skb->cb */
905 memcpy(&tx_status, skb->cb, sizeof(tx_status));
906 skb->pkt_type = 0;
907 ieee80211_tx_status(local_to_hw(local),
908 skb, tx_status);
909 kfree(tx_status);
910 break;
911 default: /* should never get here! */
912 printk(KERN_ERR "%s: Unknown message type (%d)\n",
913 local->mdev->name, skb->pkt_type);
914 dev_kfree_skb(skb);
915 break;
916 }
917 }
918 }
919
920 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
921 * make a prepared TX frame (one that has been given to hw) to look like brand
922 * new IEEE 802.11 frame that is ready to go through TX processing again.
923 * Also, tx_packet_data in cb is restored from tx_control. */
924 static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
925 struct ieee80211_key *key,
926 struct sk_buff *skb,
927 struct ieee80211_tx_control *control)
928 {
929 int hdrlen, iv_len, mic_len;
930 struct ieee80211_tx_packet_data *pkt_data;
931
932 pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
933 pkt_data->ifindex = control->ifindex;
934 pkt_data->mgmt_iface = (control->type == IEEE80211_IF_TYPE_MGMT);
935 pkt_data->req_tx_status = !!(control->flags & IEEE80211_TXCTL_REQ_TX_STATUS);
936 pkt_data->do_not_encrypt = !!(control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT);
937 pkt_data->requeue = !!(control->flags & IEEE80211_TXCTL_REQUEUE);
938 pkt_data->queue = control->queue;
939
940 hdrlen = ieee80211_get_hdrlen_from_skb(skb);
941
942 if (!key)
943 goto no_key;
944
945 switch (key->alg) {
946 case ALG_WEP:
947 iv_len = WEP_IV_LEN;
948 mic_len = WEP_ICV_LEN;
949 break;
950 case ALG_TKIP:
951 iv_len = TKIP_IV_LEN;
952 mic_len = TKIP_ICV_LEN;
953 break;
954 case ALG_CCMP:
955 iv_len = CCMP_HDR_LEN;
956 mic_len = CCMP_MIC_LEN;
957 break;
958 default:
959 goto no_key;
960 }
961
962 if (skb->len >= mic_len && key->force_sw_encrypt)
963 skb_trim(skb, skb->len - mic_len);
964 if (skb->len >= iv_len && skb->len > hdrlen) {
965 memmove(skb->data + iv_len, skb->data, hdrlen);
966 skb_pull(skb, iv_len);
967 }
968
969 no_key:
970 {
971 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
972 u16 fc = le16_to_cpu(hdr->frame_control);
973 if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
974 fc &= ~IEEE80211_STYPE_QOS_DATA;
975 hdr->frame_control = cpu_to_le16(fc);
976 memmove(skb->data + 2, skb->data, hdrlen - 2);
977 skb_pull(skb, 2);
978 }
979 }
980 }
981
982 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
983 struct ieee80211_tx_status *status)
984 {
985 struct sk_buff *skb2;
986 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
987 struct ieee80211_local *local = hw_to_local(hw);
988 u16 frag, type;
989 u32 msg_type;
990 struct ieee80211_tx_status_rtap_hdr *rthdr;
991 struct ieee80211_sub_if_data *sdata;
992 int monitors;
993
994 if (!status) {
995 printk(KERN_ERR
996 "%s: ieee80211_tx_status called with NULL status\n",
997 local->mdev->name);
998 dev_kfree_skb(skb);
999 return;
1000 }
1001
1002 if (status->excessive_retries) {
1003 struct sta_info *sta;
1004 sta = sta_info_get(local, hdr->addr1);
1005 if (sta) {
1006 if (sta->flags & WLAN_STA_PS) {
1007 /* The STA is in power save mode, so assume
1008 * that this TX packet failed because of that.
1009 */
1010 status->excessive_retries = 0;
1011 status->flags |= IEEE80211_TX_STATUS_TX_FILTERED;
1012 }
1013 sta_info_put(sta);
1014 }
1015 }
1016
1017 if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) {
1018 struct sta_info *sta;
1019 sta = sta_info_get(local, hdr->addr1);
1020 if (sta) {
1021 sta->tx_filtered_count++;
1022
1023 /* Clear the TX filter mask for this STA when sending
1024 * the next packet. If the STA went to power save mode,
1025 * this will happen when it is waking up for the next
1026 * time. */
1027 sta->clear_dst_mask = 1;
1028
1029 /* TODO: Is the WLAN_STA_PS flag always set here or is
1030 * the race between RX and TX status causing some
1031 * packets to be filtered out before 80211.o gets an
1032 * update for PS status? This seems to be the case, so
1033 * no changes are likely to be needed. */
1034 if (sta->flags & WLAN_STA_PS &&
1035 skb_queue_len(&sta->tx_filtered) <
1036 STA_MAX_TX_BUFFER) {
1037 ieee80211_remove_tx_extra(local, sta->key,
1038 skb,
1039 &status->control);
1040 skb_queue_tail(&sta->tx_filtered, skb);
1041 } else if (!(sta->flags & WLAN_STA_PS) &&
1042 !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) {
1043 /* Software retry the packet once */
1044 status->control.flags |= IEEE80211_TXCTL_REQUEUE;
1045 ieee80211_remove_tx_extra(local, sta->key,
1046 skb,
1047 &status->control);
1048 dev_queue_xmit(skb);
1049 } else {
1050 if (net_ratelimit()) {
1051 printk(KERN_DEBUG "%s: dropped TX "
1052 "filtered frame queue_len=%d "
1053 "PS=%d @%lu\n",
1054 local->mdev->name,
1055 skb_queue_len(
1056 &sta->tx_filtered),
1057 !!(sta->flags & WLAN_STA_PS),
1058 jiffies);
1059 }
1060 dev_kfree_skb(skb);
1061 }
1062 sta_info_put(sta);
1063 return;
1064 }
1065 } else {
1066 /* FIXME: STUPID to call this with both local and local->mdev */
1067 rate_control_tx_status(local, local->mdev, skb, status);
1068 }
1069
1070 ieee80211_led_tx(local, 0);
1071
1072 /* SNMP counters
1073 * Fragments are passed to low-level drivers as separate skbs, so these
1074 * are actually fragments, not frames. Update frame counters only for
1075 * the first fragment of the frame. */
1076
1077 frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
1078 type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
1079
1080 if (status->flags & IEEE80211_TX_STATUS_ACK) {
1081 if (frag == 0) {
1082 local->dot11TransmittedFrameCount++;
1083 if (is_multicast_ether_addr(hdr->addr1))
1084 local->dot11MulticastTransmittedFrameCount++;
1085 if (status->retry_count > 0)
1086 local->dot11RetryCount++;
1087 if (status->retry_count > 1)
1088 local->dot11MultipleRetryCount++;
1089 }
1090
1091 /* This counter shall be incremented for an acknowledged MPDU
1092 * with an individual address in the address 1 field or an MPDU
1093 * with a multicast address in the address 1 field of type Data
1094 * or Management. */
1095 if (!is_multicast_ether_addr(hdr->addr1) ||
1096 type == IEEE80211_FTYPE_DATA ||
1097 type == IEEE80211_FTYPE_MGMT)
1098 local->dot11TransmittedFragmentCount++;
1099 } else {
1100 if (frag == 0)
1101 local->dot11FailedCount++;
1102 }
1103
1104 msg_type = (status->flags & IEEE80211_TX_STATUS_ACK) ?
1105 ieee80211_msg_tx_callback_ack : ieee80211_msg_tx_callback_fail;
1106
1107 /* this was a transmitted frame, but now we want to reuse it */
1108 skb_orphan(skb);
1109
1110 if ((status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS) &&
1111 local->apdev) {
1112 if (local->monitors) {
1113 skb2 = skb_clone(skb, GFP_ATOMIC);
1114 } else {
1115 skb2 = skb;
1116 skb = NULL;
1117 }
1118
1119 if (skb2)
1120 /* Send frame to hostapd */
1121 ieee80211_rx_mgmt(local, skb2, NULL, msg_type);
1122
1123 if (!skb)
1124 return;
1125 }
1126
1127 if (!local->monitors) {
1128 dev_kfree_skb(skb);
1129 return;
1130 }
1131
1132 /* send frame to monitor interfaces now */
1133
1134 if (skb_headroom(skb) < sizeof(*rthdr)) {
1135 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
1136 dev_kfree_skb(skb);
1137 return;
1138 }
1139
1140 rthdr = (struct ieee80211_tx_status_rtap_hdr*)
1141 skb_push(skb, sizeof(*rthdr));
1142
1143 memset(rthdr, 0, sizeof(*rthdr));
1144 rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
1145 rthdr->hdr.it_present =
1146 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
1147 (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
1148
1149 if (!(status->flags & IEEE80211_TX_STATUS_ACK) &&
1150 !is_multicast_ether_addr(hdr->addr1))
1151 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
1152
1153 if ((status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) &&
1154 (status->control.flags & IEEE80211_TXCTL_USE_CTS_PROTECT))
1155 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
1156 else if (status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS)
1157 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
1158
1159 rthdr->data_retries = status->retry_count;
1160
1161 read_lock(&local->sub_if_lock);
1162 monitors = local->monitors;
1163 list_for_each_entry(sdata, &local->sub_if_list, list) {
1164 /*
1165 * Using the monitors counter is possibly racy, but
1166 * if the value is wrong we simply either clone the skb
1167 * once too much or forget sending it to one monitor iface
1168 * The latter case isn't nice but fixing the race is much
1169 * more complicated.
1170 */
1171 if (!monitors || !skb)
1172 goto out;
1173
1174 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
1175 if (!netif_running(sdata->dev))
1176 continue;
1177 monitors--;
1178 if (monitors)
1179 skb2 = skb_clone(skb, GFP_KERNEL);
1180 else
1181 skb2 = NULL;
1182 skb->dev = sdata->dev;
1183 /* XXX: is this sufficient for BPF? */
1184 skb_set_mac_header(skb, 0);
1185 skb->ip_summed = CHECKSUM_UNNECESSARY;
1186 skb->pkt_type = PACKET_OTHERHOST;
1187 skb->protocol = htons(ETH_P_802_2);
1188 memset(skb->cb, 0, sizeof(skb->cb));
1189 netif_rx(skb);
1190 skb = skb2;
1191 }
1192 }
1193 out:
1194 read_unlock(&local->sub_if_lock);
1195 if (skb)
1196 dev_kfree_skb(skb);
1197 }
1198 EXPORT_SYMBOL(ieee80211_tx_status);
1199
1200 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
1201 const struct ieee80211_ops *ops)
1202 {
1203 struct net_device *mdev;
1204 struct ieee80211_local *local;
1205 struct ieee80211_sub_if_data *sdata;
1206 int priv_size;
1207 struct wiphy *wiphy;
1208
1209 /* Ensure 32-byte alignment of our private data and hw private data.
1210 * We use the wiphy priv data for both our ieee80211_local and for
1211 * the driver's private data
1212 *
1213 * In memory it'll be like this:
1214 *
1215 * +-------------------------+
1216 * | struct wiphy |
1217 * +-------------------------+
1218 * | struct ieee80211_local |
1219 * +-------------------------+
1220 * | driver's private data |
1221 * +-------------------------+
1222 *
1223 */
1224 priv_size = ((sizeof(struct ieee80211_local) +
1225 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
1226 priv_data_len;
1227
1228 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
1229
1230 if (!wiphy)
1231 return NULL;
1232
1233 wiphy->privid = mac80211_wiphy_privid;
1234
1235 local = wiphy_priv(wiphy);
1236 local->hw.wiphy = wiphy;
1237
1238 local->hw.priv = (char *)local +
1239 ((sizeof(struct ieee80211_local) +
1240 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
1241
1242 BUG_ON(!ops->tx);
1243 BUG_ON(!ops->config);
1244 BUG_ON(!ops->add_interface);
1245 local->ops = ops;
1246
1247 /* for now, mdev needs sub_if_data :/ */
1248 mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
1249 "wmaster%d", ether_setup);
1250 if (!mdev) {
1251 wiphy_free(wiphy);
1252 return NULL;
1253 }
1254
1255 sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
1256 mdev->ieee80211_ptr = &sdata->wdev;
1257 sdata->wdev.wiphy = wiphy;
1258
1259 local->hw.queues = 1; /* default */
1260
1261 local->mdev = mdev;
1262 local->rx_pre_handlers = ieee80211_rx_pre_handlers;
1263 local->rx_handlers = ieee80211_rx_handlers;
1264 local->tx_handlers = ieee80211_tx_handlers;
1265
1266 local->bridge_packets = 1;
1267
1268 local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1269 local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1270 local->short_retry_limit = 7;
1271 local->long_retry_limit = 4;
1272 local->hw.conf.radio_enabled = 1;
1273
1274 local->enabled_modes = (unsigned int) -1;
1275
1276 INIT_LIST_HEAD(&local->modes_list);
1277
1278 rwlock_init(&local->sub_if_lock);
1279 INIT_LIST_HEAD(&local->sub_if_list);
1280
1281 INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
1282 init_timer(&local->stat_timer);
1283 local->stat_timer.function = ieee80211_stat_refresh;
1284 local->stat_timer.data = (unsigned long) local;
1285 ieee80211_rx_bss_list_init(mdev);
1286
1287 sta_info_init(local);
1288
1289 mdev->hard_start_xmit = ieee80211_master_start_xmit;
1290 mdev->open = ieee80211_master_open;
1291 mdev->stop = ieee80211_master_stop;
1292 mdev->type = ARPHRD_IEEE80211;
1293 mdev->hard_header_parse = header_parse_80211;
1294
1295 sdata->type = IEEE80211_IF_TYPE_AP;
1296 sdata->dev = mdev;
1297 sdata->local = local;
1298 sdata->u.ap.force_unicast_rateidx = -1;
1299 sdata->u.ap.max_ratectrl_rateidx = -1;
1300 ieee80211_if_sdata_init(sdata);
1301 list_add_tail(&sdata->list, &local->sub_if_list);
1302
1303 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1304 (unsigned long)local);
1305 tasklet_disable(&local->tx_pending_tasklet);
1306
1307 tasklet_init(&local->tasklet,
1308 ieee80211_tasklet_handler,
1309 (unsigned long) local);
1310 tasklet_disable(&local->tasklet);
1311
1312 skb_queue_head_init(&local->skb_queue);
1313 skb_queue_head_init(&local->skb_queue_unreliable);
1314
1315 return local_to_hw(local);
1316 }
1317 EXPORT_SYMBOL(ieee80211_alloc_hw);
1318
1319 int ieee80211_register_hw(struct ieee80211_hw *hw)
1320 {
1321 struct ieee80211_local *local = hw_to_local(hw);
1322 const char *name;
1323 int result;
1324
1325 result = wiphy_register(local->hw.wiphy);
1326 if (result < 0)
1327 return result;
1328
1329 name = wiphy_dev(local->hw.wiphy)->driver->name;
1330 local->hw.workqueue = create_singlethread_workqueue(name);
1331 if (!local->hw.workqueue) {
1332 result = -ENOMEM;
1333 goto fail_workqueue;
1334 }
1335
1336 /*
1337 * The hardware needs headroom for sending the frame,
1338 * and we need some headroom for passing the frame to monitor
1339 * interfaces, but never both at the same time.
1340 */
1341 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1342 sizeof(struct ieee80211_tx_status_rtap_hdr));
1343
1344 debugfs_hw_add(local);
1345
1346 local->hw.conf.beacon_int = 1000;
1347
1348 local->wstats_flags |= local->hw.max_rssi ?
1349 IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID;
1350 local->wstats_flags |= local->hw.max_signal ?
1351 IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1352 local->wstats_flags |= local->hw.max_noise ?
1353 IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1354 if (local->hw.max_rssi < 0 || local->hw.max_noise < 0)
1355 local->wstats_flags |= IW_QUAL_DBM;
1356
1357 result = sta_info_start(local);
1358 if (result < 0)
1359 goto fail_sta_info;
1360
1361 rtnl_lock();
1362 result = dev_alloc_name(local->mdev, local->mdev->name);
1363 if (result < 0)
1364 goto fail_dev;
1365
1366 memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1367 SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1368
1369 result = register_netdevice(local->mdev);
1370 if (result < 0)
1371 goto fail_dev;
1372
1373 ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1374
1375 result = ieee80211_init_rate_ctrl_alg(local, NULL);
1376 if (result < 0) {
1377 printk(KERN_DEBUG "%s: Failed to initialize rate control "
1378 "algorithm\n", local->mdev->name);
1379 goto fail_rate;
1380 }
1381
1382 result = ieee80211_wep_init(local);
1383
1384 if (result < 0) {
1385 printk(KERN_DEBUG "%s: Failed to initialize wep\n",
1386 local->mdev->name);
1387 goto fail_wep;
1388 }
1389
1390 ieee80211_install_qdisc(local->mdev);
1391
1392 /* add one default STA interface */
1393 result = ieee80211_if_add(local->mdev, "wlan%d", NULL,
1394 IEEE80211_IF_TYPE_STA);
1395 if (result)
1396 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
1397 local->mdev->name);
1398
1399 local->reg_state = IEEE80211_DEV_REGISTERED;
1400 rtnl_unlock();
1401
1402 ieee80211_led_init(local);
1403
1404 return 0;
1405
1406 fail_wep:
1407 rate_control_deinitialize(local);
1408 fail_rate:
1409 ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1410 unregister_netdevice(local->mdev);
1411 fail_dev:
1412 rtnl_unlock();
1413 sta_info_stop(local);
1414 fail_sta_info:
1415 debugfs_hw_del(local);
1416 destroy_workqueue(local->hw.workqueue);
1417 fail_workqueue:
1418 wiphy_unregister(local->hw.wiphy);
1419 return result;
1420 }
1421 EXPORT_SYMBOL(ieee80211_register_hw);
1422
1423 int ieee80211_register_hwmode(struct ieee80211_hw *hw,
1424 struct ieee80211_hw_mode *mode)
1425 {
1426 struct ieee80211_local *local = hw_to_local(hw);
1427 struct ieee80211_rate *rate;
1428 int i;
1429
1430 INIT_LIST_HEAD(&mode->list);
1431 list_add_tail(&mode->list, &local->modes_list);
1432
1433 local->hw_modes |= (1 << mode->mode);
1434 for (i = 0; i < mode->num_rates; i++) {
1435 rate = &(mode->rates[i]);
1436 rate->rate_inv = CHAN_UTIL_RATE_LCM / rate->rate;
1437 }
1438 ieee80211_prepare_rates(local, mode);
1439
1440 if (!local->oper_hw_mode) {
1441 /* Default to this mode */
1442 local->hw.conf.phymode = mode->mode;
1443 local->oper_hw_mode = local->scan_hw_mode = mode;
1444 local->oper_channel = local->scan_channel = &mode->channels[0];
1445 local->hw.conf.mode = local->oper_hw_mode;
1446 local->hw.conf.chan = local->oper_channel;
1447 }
1448
1449 if (!(hw->flags & IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED))
1450 ieee80211_set_default_regdomain(mode);
1451
1452 return 0;
1453 }
1454 EXPORT_SYMBOL(ieee80211_register_hwmode);
1455
1456 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1457 {
1458 struct ieee80211_local *local = hw_to_local(hw);
1459 struct ieee80211_sub_if_data *sdata, *tmp;
1460 struct list_head tmp_list;
1461 int i;
1462
1463 tasklet_kill(&local->tx_pending_tasklet);
1464 tasklet_kill(&local->tasklet);
1465
1466 rtnl_lock();
1467
1468 BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED);
1469
1470 local->reg_state = IEEE80211_DEV_UNREGISTERED;
1471 if (local->apdev)
1472 ieee80211_if_del_mgmt(local);
1473
1474 write_lock_bh(&local->sub_if_lock);
1475 list_replace_init(&local->sub_if_list, &tmp_list);
1476 write_unlock_bh(&local->sub_if_lock);
1477
1478 list_for_each_entry_safe(sdata, tmp, &tmp_list, list)
1479 __ieee80211_if_del(local, sdata);
1480
1481 rtnl_unlock();
1482
1483 if (local->stat_time)
1484 del_timer_sync(&local->stat_timer);
1485
1486 ieee80211_rx_bss_list_deinit(local->mdev);
1487 ieee80211_clear_tx_pending(local);
1488 sta_info_stop(local);
1489 rate_control_deinitialize(local);
1490 debugfs_hw_del(local);
1491
1492 for (i = 0; i < NUM_IEEE80211_MODES; i++) {
1493 kfree(local->supp_rates[i]);
1494 kfree(local->basic_rates[i]);
1495 }
1496
1497 if (skb_queue_len(&local->skb_queue)
1498 || skb_queue_len(&local->skb_queue_unreliable))
1499 printk(KERN_WARNING "%s: skb_queue not empty\n",
1500 local->mdev->name);
1501 skb_queue_purge(&local->skb_queue);
1502 skb_queue_purge(&local->skb_queue_unreliable);
1503
1504 destroy_workqueue(local->hw.workqueue);
1505 wiphy_unregister(local->hw.wiphy);
1506 ieee80211_wep_free(local);
1507 ieee80211_led_exit(local);
1508 }
1509 EXPORT_SYMBOL(ieee80211_unregister_hw);
1510
1511 void ieee80211_free_hw(struct ieee80211_hw *hw)
1512 {
1513 struct ieee80211_local *local = hw_to_local(hw);
1514
1515 ieee80211_if_free(local->mdev);
1516 wiphy_free(local->hw.wiphy);
1517 }
1518 EXPORT_SYMBOL(ieee80211_free_hw);
1519
1520 struct net_device_stats *ieee80211_dev_stats(struct net_device *dev)
1521 {
1522 struct ieee80211_sub_if_data *sdata;
1523 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1524 return &sdata->stats;
1525 }
1526
1527 static int __init ieee80211_init(void)
1528 {
1529 struct sk_buff *skb;
1530 int ret;
1531
1532 BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb));
1533
1534 ret = ieee80211_wme_register();
1535 if (ret) {
1536 printk(KERN_DEBUG "ieee80211_init: failed to "
1537 "initialize WME (err=%d)\n", ret);
1538 return ret;
1539 }
1540
1541 ieee80211_debugfs_netdev_init();
1542 ieee80211_regdomain_init();
1543
1544 return 0;
1545 }
1546
1547 static void __exit ieee80211_exit(void)
1548 {
1549 ieee80211_wme_unregister();
1550 ieee80211_debugfs_netdev_exit();
1551 }
1552
1553
1554 subsys_initcall(ieee80211_init);
1555 module_exit(ieee80211_exit);
1556
1557 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1558 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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