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8f472379b128ed6e1665c5453f3ecd1fb215d587
[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 void ieee80211_key_threshold_notify(struct net_device *dev,
205 struct ieee80211_key *key,
206 struct sta_info *sta)
207 {
208 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
209 struct sk_buff *skb;
210 struct ieee80211_msg_key_notification *msg;
211
212 /* if no one will get it anyway, don't even allocate it.
213 * unlikely because this is only relevant for APs
214 * where the device must be open... */
215 if (unlikely(!local->apdev))
216 return;
217
218 skb = dev_alloc_skb(sizeof(struct ieee80211_frame_info) +
219 sizeof(struct ieee80211_msg_key_notification));
220 if (!skb)
221 return;
222
223 skb_reserve(skb, sizeof(struct ieee80211_frame_info));
224 msg = (struct ieee80211_msg_key_notification *)
225 skb_put(skb, sizeof(struct ieee80211_msg_key_notification));
226 msg->tx_rx_count = key->tx_rx_count;
227 memcpy(msg->ifname, dev->name, IFNAMSIZ);
228 if (sta)
229 memcpy(msg->addr, sta->addr, ETH_ALEN);
230 else
231 memset(msg->addr, 0xff, ETH_ALEN);
232
233 key->tx_rx_count = 0;
234
235 ieee80211_rx_mgmt(local, skb, NULL,
236 ieee80211_msg_key_threshold_notification);
237 }
238
239 static int ieee80211_mgmt_open(struct net_device *dev)
240 {
241 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
242
243 if (!netif_running(local->mdev))
244 return -EOPNOTSUPP;
245 return 0;
246 }
247
248 static int ieee80211_mgmt_stop(struct net_device *dev)
249 {
250 return 0;
251 }
252
253 static int ieee80211_change_mtu_apdev(struct net_device *dev, int new_mtu)
254 {
255 /* FIX: what would be proper limits for MTU?
256 * This interface uses 802.11 frames. */
257 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN) {
258 printk(KERN_WARNING "%s: invalid MTU %d\n",
259 dev->name, new_mtu);
260 return -EINVAL;
261 }
262
263 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
264 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
265 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
266 dev->mtu = new_mtu;
267 return 0;
268 }
269
270 void ieee80211_if_mgmt_setup(struct net_device *dev)
271 {
272 ether_setup(dev);
273 dev->hard_start_xmit = ieee80211_mgmt_start_xmit;
274 dev->change_mtu = ieee80211_change_mtu_apdev;
275 dev->get_stats = ieee80211_get_stats;
276 dev->open = ieee80211_mgmt_open;
277 dev->stop = ieee80211_mgmt_stop;
278 dev->type = ARPHRD_IEEE80211_PRISM;
279 dev->hard_header_parse = header_parse_80211;
280 dev->uninit = ieee80211_if_reinit;
281 dev->destructor = ieee80211_if_free;
282 }
283
284 /* regular interfaces */
285
286 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
287 {
288 /* FIX: what would be proper limits for MTU?
289 * This interface uses 802.3 frames. */
290 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6) {
291 printk(KERN_WARNING "%s: invalid MTU %d\n",
292 dev->name, new_mtu);
293 return -EINVAL;
294 }
295
296 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
297 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
298 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
299 dev->mtu = new_mtu;
300 return 0;
301 }
302
303 static inline int identical_mac_addr_allowed(int type1, int type2)
304 {
305 return (type1 == IEEE80211_IF_TYPE_MNTR ||
306 type2 == IEEE80211_IF_TYPE_MNTR ||
307 (type1 == IEEE80211_IF_TYPE_AP &&
308 type2 == IEEE80211_IF_TYPE_WDS) ||
309 (type1 == IEEE80211_IF_TYPE_WDS &&
310 (type2 == IEEE80211_IF_TYPE_WDS ||
311 type2 == IEEE80211_IF_TYPE_AP)) ||
312 (type1 == IEEE80211_IF_TYPE_AP &&
313 type2 == IEEE80211_IF_TYPE_VLAN) ||
314 (type1 == IEEE80211_IF_TYPE_VLAN &&
315 (type2 == IEEE80211_IF_TYPE_AP ||
316 type2 == IEEE80211_IF_TYPE_VLAN)));
317 }
318
319 /* Check if running monitor interfaces should go to a "soft monitor" mode
320 * and switch them if necessary. */
321 static inline void ieee80211_start_soft_monitor(struct ieee80211_local *local)
322 {
323 struct ieee80211_if_init_conf conf;
324
325 if (local->open_count && local->open_count == local->monitors &&
326 !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER) &&
327 local->ops->remove_interface) {
328 conf.if_id = -1;
329 conf.type = IEEE80211_IF_TYPE_MNTR;
330 conf.mac_addr = NULL;
331 local->ops->remove_interface(local_to_hw(local), &conf);
332 }
333 }
334
335 /* Check if running monitor interfaces should go to a "hard monitor" mode
336 * and switch them if necessary. */
337 static void ieee80211_start_hard_monitor(struct ieee80211_local *local)
338 {
339 struct ieee80211_if_init_conf conf;
340
341 if (local->open_count && local->open_count == local->monitors &&
342 !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
343 conf.if_id = -1;
344 conf.type = IEEE80211_IF_TYPE_MNTR;
345 conf.mac_addr = NULL;
346 local->ops->add_interface(local_to_hw(local), &conf);
347 }
348 }
349
350 static void ieee80211_if_open(struct net_device *dev)
351 {
352 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
353
354 switch (sdata->type) {
355 case IEEE80211_IF_TYPE_STA:
356 case IEEE80211_IF_TYPE_IBSS:
357 sdata->u.sta.prev_bssid_set = 0;
358 break;
359 }
360 }
361
362 static int ieee80211_open(struct net_device *dev)
363 {
364 struct ieee80211_sub_if_data *sdata, *nsdata;
365 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
366 struct ieee80211_if_init_conf conf;
367 int res;
368
369 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
370 read_lock(&local->sub_if_lock);
371 list_for_each_entry(nsdata, &local->sub_if_list, list) {
372 struct net_device *ndev = nsdata->dev;
373
374 if (ndev != dev && ndev != local->mdev && netif_running(ndev) &&
375 compare_ether_addr(dev->dev_addr, ndev->dev_addr) == 0 &&
376 !identical_mac_addr_allowed(sdata->type, nsdata->type)) {
377 read_unlock(&local->sub_if_lock);
378 return -ENOTUNIQ;
379 }
380 }
381 read_unlock(&local->sub_if_lock);
382
383 if (sdata->type == IEEE80211_IF_TYPE_WDS &&
384 is_zero_ether_addr(sdata->u.wds.remote_addr))
385 return -ENOLINK;
386
387 if (sdata->type == IEEE80211_IF_TYPE_MNTR && local->open_count &&
388 !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
389 /* run the interface in a "soft monitor" mode */
390 local->monitors++;
391 local->open_count++;
392 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
393 return 0;
394 }
395 ieee80211_if_open(dev);
396 ieee80211_start_soft_monitor(local);
397
398 conf.if_id = dev->ifindex;
399 conf.type = sdata->type;
400 if (sdata->type == IEEE80211_IF_TYPE_MNTR)
401 conf.mac_addr = NULL;
402 else
403 conf.mac_addr = dev->dev_addr;
404 res = local->ops->add_interface(local_to_hw(local), &conf);
405 if (res) {
406 if (sdata->type == IEEE80211_IF_TYPE_MNTR)
407 ieee80211_start_hard_monitor(local);
408 return res;
409 }
410
411 if (local->open_count == 0) {
412 res = 0;
413 tasklet_enable(&local->tx_pending_tasklet);
414 tasklet_enable(&local->tasklet);
415 if (local->ops->open)
416 res = local->ops->open(local_to_hw(local));
417 if (res == 0) {
418 res = dev_open(local->mdev);
419 if (res) {
420 if (local->ops->stop)
421 local->ops->stop(local_to_hw(local));
422 } else {
423 res = ieee80211_hw_config(local);
424 if (res && local->ops->stop)
425 local->ops->stop(local_to_hw(local));
426 else if (!res && local->apdev)
427 dev_open(local->apdev);
428 }
429 }
430 if (res) {
431 if (local->ops->remove_interface)
432 local->ops->remove_interface(local_to_hw(local),
433 &conf);
434 return res;
435 }
436 }
437 local->open_count++;
438
439 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
440 local->monitors++;
441 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
442 } else {
443 ieee80211_if_config(dev);
444 ieee80211_reset_erp_info(dev);
445 }
446
447 if (sdata->type == IEEE80211_IF_TYPE_STA &&
448 !local->user_space_mlme)
449 netif_carrier_off(dev);
450 else
451 netif_carrier_on(dev);
452
453 netif_start_queue(dev);
454 return 0;
455 }
456
457 static void ieee80211_if_shutdown(struct net_device *dev)
458 {
459 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
460 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
461
462 ASSERT_RTNL();
463 switch (sdata->type) {
464 case IEEE80211_IF_TYPE_STA:
465 case IEEE80211_IF_TYPE_IBSS:
466 sdata->u.sta.state = IEEE80211_DISABLED;
467 del_timer_sync(&sdata->u.sta.timer);
468 /*
469 * Holding the sub_if_lock for writing here blocks
470 * out the receive path and makes sure it's not
471 * currently processing a packet that may get
472 * added to the queue.
473 */
474 write_lock_bh(&local->sub_if_lock);
475 skb_queue_purge(&sdata->u.sta.skb_queue);
476 write_unlock_bh(&local->sub_if_lock);
477
478 if (!local->ops->hw_scan &&
479 local->scan_dev == sdata->dev) {
480 local->sta_scanning = 0;
481 cancel_delayed_work(&local->scan_work);
482 }
483 flush_workqueue(local->hw.workqueue);
484 break;
485 }
486 }
487
488 static int ieee80211_stop(struct net_device *dev)
489 {
490 struct ieee80211_sub_if_data *sdata;
491 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
492
493 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
494
495 if (sdata->type == IEEE80211_IF_TYPE_MNTR &&
496 local->open_count > 1 &&
497 !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
498 /* remove "soft monitor" interface */
499 local->open_count--;
500 local->monitors--;
501 if (!local->monitors)
502 local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
503 return 0;
504 }
505
506 netif_stop_queue(dev);
507 ieee80211_if_shutdown(dev);
508
509 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
510 local->monitors--;
511 if (!local->monitors)
512 local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
513 }
514
515 local->open_count--;
516 if (local->open_count == 0) {
517 if (netif_running(local->mdev))
518 dev_close(local->mdev);
519 if (local->apdev)
520 dev_close(local->apdev);
521 if (local->ops->stop)
522 local->ops->stop(local_to_hw(local));
523 tasklet_disable(&local->tx_pending_tasklet);
524 tasklet_disable(&local->tasklet);
525 }
526 if (local->ops->remove_interface) {
527 struct ieee80211_if_init_conf conf;
528
529 conf.if_id = dev->ifindex;
530 conf.type = sdata->type;
531 conf.mac_addr = dev->dev_addr;
532 local->ops->remove_interface(local_to_hw(local), &conf);
533 }
534
535 ieee80211_start_hard_monitor(local);
536
537 return 0;
538 }
539
540 enum netif_tx_lock_class {
541 TX_LOCK_NORMAL,
542 TX_LOCK_MASTER,
543 };
544
545 static inline void netif_tx_lock_nested(struct net_device *dev, int subclass)
546 {
547 spin_lock_nested(&dev->_xmit_lock, subclass);
548 dev->xmit_lock_owner = smp_processor_id();
549 }
550
551 static void ieee80211_set_multicast_list(struct net_device *dev)
552 {
553 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
554 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
555 unsigned short flags;
556
557 netif_tx_lock_nested(local->mdev, TX_LOCK_MASTER);
558 if (((dev->flags & IFF_ALLMULTI) != 0) ^ (sdata->allmulti != 0)) {
559 if (sdata->allmulti) {
560 sdata->allmulti = 0;
561 local->iff_allmultis--;
562 } else {
563 sdata->allmulti = 1;
564 local->iff_allmultis++;
565 }
566 }
567 if (((dev->flags & IFF_PROMISC) != 0) ^ (sdata->promisc != 0)) {
568 if (sdata->promisc) {
569 sdata->promisc = 0;
570 local->iff_promiscs--;
571 } else {
572 sdata->promisc = 1;
573 local->iff_promiscs++;
574 }
575 }
576 if (dev->mc_count != sdata->mc_count) {
577 local->mc_count = local->mc_count - sdata->mc_count +
578 dev->mc_count;
579 sdata->mc_count = dev->mc_count;
580 }
581 if (local->ops->set_multicast_list) {
582 flags = local->mdev->flags;
583 if (local->iff_allmultis)
584 flags |= IFF_ALLMULTI;
585 if (local->iff_promiscs)
586 flags |= IFF_PROMISC;
587 read_lock(&local->sub_if_lock);
588 local->ops->set_multicast_list(local_to_hw(local), flags,
589 local->mc_count);
590 read_unlock(&local->sub_if_lock);
591 }
592 netif_tx_unlock(local->mdev);
593 }
594
595 /* Must not be called for mdev and apdev */
596 void ieee80211_if_setup(struct net_device *dev)
597 {
598 ether_setup(dev);
599 dev->hard_start_xmit = ieee80211_subif_start_xmit;
600 dev->wireless_handlers = &ieee80211_iw_handler_def;
601 dev->set_multicast_list = ieee80211_set_multicast_list;
602 dev->change_mtu = ieee80211_change_mtu;
603 dev->get_stats = ieee80211_get_stats;
604 dev->open = ieee80211_open;
605 dev->stop = ieee80211_stop;
606 dev->uninit = ieee80211_if_reinit;
607 dev->destructor = ieee80211_if_free;
608 }
609
610 /* WDS specialties */
611
612 int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr)
613 {
614 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
615 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
616 struct sta_info *sta;
617
618 if (compare_ether_addr(remote_addr, sdata->u.wds.remote_addr) == 0)
619 return 0;
620
621 /* Create STA entry for the new peer */
622 sta = sta_info_add(local, dev, remote_addr, GFP_KERNEL);
623 if (!sta)
624 return -ENOMEM;
625 sta_info_put(sta);
626
627 /* Remove STA entry for the old peer */
628 sta = sta_info_get(local, sdata->u.wds.remote_addr);
629 if (sta) {
630 sta_info_free(sta);
631 sta_info_put(sta);
632 } else {
633 printk(KERN_DEBUG "%s: could not find STA entry for WDS link "
634 "peer " MAC_FMT "\n",
635 dev->name, MAC_ARG(sdata->u.wds.remote_addr));
636 }
637
638 /* Update WDS link data */
639 memcpy(&sdata->u.wds.remote_addr, remote_addr, ETH_ALEN);
640
641 return 0;
642 }
643
644 /* everything else */
645
646 static int __ieee80211_if_config(struct net_device *dev,
647 struct sk_buff *beacon,
648 struct ieee80211_tx_control *control)
649 {
650 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
651 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
652 struct ieee80211_if_conf conf;
653 static u8 scan_bssid[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
654
655 if (!local->ops->config_interface || !netif_running(dev))
656 return 0;
657
658 memset(&conf, 0, sizeof(conf));
659 conf.type = sdata->type;
660 if (sdata->type == IEEE80211_IF_TYPE_STA ||
661 sdata->type == IEEE80211_IF_TYPE_IBSS) {
662 if (local->sta_scanning &&
663 local->scan_dev == dev)
664 conf.bssid = scan_bssid;
665 else
666 conf.bssid = sdata->u.sta.bssid;
667 conf.ssid = sdata->u.sta.ssid;
668 conf.ssid_len = sdata->u.sta.ssid_len;
669 conf.generic_elem = sdata->u.sta.extra_ie;
670 conf.generic_elem_len = sdata->u.sta.extra_ie_len;
671 } else if (sdata->type == IEEE80211_IF_TYPE_AP) {
672 conf.ssid = sdata->u.ap.ssid;
673 conf.ssid_len = sdata->u.ap.ssid_len;
674 conf.generic_elem = sdata->u.ap.generic_elem;
675 conf.generic_elem_len = sdata->u.ap.generic_elem_len;
676 conf.beacon = beacon;
677 conf.beacon_control = control;
678 }
679 return local->ops->config_interface(local_to_hw(local),
680 dev->ifindex, &conf);
681 }
682
683 int ieee80211_if_config(struct net_device *dev)
684 {
685 return __ieee80211_if_config(dev, NULL, NULL);
686 }
687
688 int ieee80211_if_config_beacon(struct net_device *dev)
689 {
690 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
691 struct ieee80211_tx_control control;
692 struct sk_buff *skb;
693
694 if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
695 return 0;
696 skb = ieee80211_beacon_get(local_to_hw(local), dev->ifindex, &control);
697 if (!skb)
698 return -ENOMEM;
699 return __ieee80211_if_config(dev, skb, &control);
700 }
701
702 int ieee80211_hw_config(struct ieee80211_local *local)
703 {
704 struct ieee80211_hw_mode *mode;
705 struct ieee80211_channel *chan;
706 int ret = 0;
707
708 if (local->sta_scanning) {
709 chan = local->scan_channel;
710 mode = local->scan_hw_mode;
711 } else {
712 chan = local->oper_channel;
713 mode = local->oper_hw_mode;
714 }
715
716 local->hw.conf.channel = chan->chan;
717 local->hw.conf.channel_val = chan->val;
718 local->hw.conf.power_level = chan->power_level;
719 local->hw.conf.freq = chan->freq;
720 local->hw.conf.phymode = mode->mode;
721 local->hw.conf.antenna_max = chan->antenna_max;
722 local->hw.conf.chan = chan;
723 local->hw.conf.mode = mode;
724
725 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
726 printk(KERN_DEBUG "HW CONFIG: channel=%d freq=%d "
727 "phymode=%d\n", local->hw.conf.channel, local->hw.conf.freq,
728 local->hw.conf.phymode);
729 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
730
731 if (local->ops->config)
732 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
733
734 return ret;
735 }
736
737 void ieee80211_erp_info_change_notify(struct net_device *dev, u8 changes)
738 {
739 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
740 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
741 if (local->ops->erp_ie_changed)
742 local->ops->erp_ie_changed(local_to_hw(local), changes,
743 sdata->use_protection,
744 !sdata->short_preamble);
745 }
746
747 void ieee80211_reset_erp_info(struct net_device *dev)
748 {
749 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
750
751 sdata->short_preamble = 0;
752 sdata->use_protection = 0;
753 ieee80211_erp_info_change_notify(dev,
754 IEEE80211_ERP_CHANGE_PROTECTION |
755 IEEE80211_ERP_CHANGE_PREAMBLE);
756 }
757
758 struct dev_mc_list *ieee80211_get_mc_list_item(struct ieee80211_hw *hw,
759 struct dev_mc_list *prev,
760 void **ptr)
761 {
762 struct ieee80211_local *local = hw_to_local(hw);
763 struct ieee80211_sub_if_data *sdata = *ptr;
764 struct dev_mc_list *mc;
765
766 if (!prev) {
767 WARN_ON(sdata);
768 sdata = NULL;
769 }
770 if (!prev || !prev->next) {
771 if (sdata)
772 sdata = list_entry(sdata->list.next,
773 struct ieee80211_sub_if_data, list);
774 else
775 sdata = list_entry(local->sub_if_list.next,
776 struct ieee80211_sub_if_data, list);
777 if (&sdata->list != &local->sub_if_list)
778 mc = sdata->dev->mc_list;
779 else
780 mc = NULL;
781 } else
782 mc = prev->next;
783
784 *ptr = sdata;
785 return mc;
786 }
787 EXPORT_SYMBOL(ieee80211_get_mc_list_item);
788
789 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
790 struct sk_buff *skb,
791 struct ieee80211_tx_status *status)
792 {
793 struct ieee80211_local *local = hw_to_local(hw);
794 struct ieee80211_tx_status *saved;
795 int tmp;
796
797 skb->dev = local->mdev;
798 saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC);
799 if (unlikely(!saved)) {
800 if (net_ratelimit())
801 printk(KERN_WARNING "%s: Not enough memory, "
802 "dropping tx status", skb->dev->name);
803 /* should be dev_kfree_skb_irq, but due to this function being
804 * named _irqsafe instead of just _irq we can't be sure that
805 * people won't call it from non-irq contexts */
806 dev_kfree_skb_any(skb);
807 return;
808 }
809 memcpy(saved, status, sizeof(struct ieee80211_tx_status));
810 /* copy pointer to saved status into skb->cb for use by tasklet */
811 memcpy(skb->cb, &saved, sizeof(saved));
812
813 skb->pkt_type = IEEE80211_TX_STATUS_MSG;
814 skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ?
815 &local->skb_queue : &local->skb_queue_unreliable, skb);
816 tmp = skb_queue_len(&local->skb_queue) +
817 skb_queue_len(&local->skb_queue_unreliable);
818 while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
819 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
820 memcpy(&saved, skb->cb, sizeof(saved));
821 kfree(saved);
822 dev_kfree_skb_irq(skb);
823 tmp--;
824 I802_DEBUG_INC(local->tx_status_drop);
825 }
826 tasklet_schedule(&local->tasklet);
827 }
828 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
829
830 static void ieee80211_tasklet_handler(unsigned long data)
831 {
832 struct ieee80211_local *local = (struct ieee80211_local *) data;
833 struct sk_buff *skb;
834 struct ieee80211_rx_status rx_status;
835 struct ieee80211_tx_status *tx_status;
836
837 while ((skb = skb_dequeue(&local->skb_queue)) ||
838 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
839 switch (skb->pkt_type) {
840 case IEEE80211_RX_MSG:
841 /* status is in skb->cb */
842 memcpy(&rx_status, skb->cb, sizeof(rx_status));
843 /* Clear skb->type in order to not confuse kernel
844 * netstack. */
845 skb->pkt_type = 0;
846 __ieee80211_rx(local_to_hw(local), skb, &rx_status);
847 break;
848 case IEEE80211_TX_STATUS_MSG:
849 /* get pointer to saved status out of skb->cb */
850 memcpy(&tx_status, skb->cb, sizeof(tx_status));
851 skb->pkt_type = 0;
852 ieee80211_tx_status(local_to_hw(local),
853 skb, tx_status);
854 kfree(tx_status);
855 break;
856 default: /* should never get here! */
857 printk(KERN_ERR "%s: Unknown message type (%d)\n",
858 local->mdev->name, skb->pkt_type);
859 dev_kfree_skb(skb);
860 break;
861 }
862 }
863 }
864
865 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
866 * make a prepared TX frame (one that has been given to hw) to look like brand
867 * new IEEE 802.11 frame that is ready to go through TX processing again.
868 * Also, tx_packet_data in cb is restored from tx_control. */
869 static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
870 struct ieee80211_key *key,
871 struct sk_buff *skb,
872 struct ieee80211_tx_control *control)
873 {
874 int hdrlen, iv_len, mic_len;
875 struct ieee80211_tx_packet_data *pkt_data;
876
877 pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
878 pkt_data->ifindex = control->ifindex;
879 pkt_data->mgmt_iface = (control->type == IEEE80211_IF_TYPE_MGMT);
880 pkt_data->req_tx_status = !!(control->flags & IEEE80211_TXCTL_REQ_TX_STATUS);
881 pkt_data->do_not_encrypt = !!(control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT);
882 pkt_data->requeue = !!(control->flags & IEEE80211_TXCTL_REQUEUE);
883 pkt_data->queue = control->queue;
884
885 hdrlen = ieee80211_get_hdrlen_from_skb(skb);
886
887 if (!key)
888 goto no_key;
889
890 switch (key->alg) {
891 case ALG_WEP:
892 iv_len = WEP_IV_LEN;
893 mic_len = WEP_ICV_LEN;
894 break;
895 case ALG_TKIP:
896 iv_len = TKIP_IV_LEN;
897 mic_len = TKIP_ICV_LEN;
898 break;
899 case ALG_CCMP:
900 iv_len = CCMP_HDR_LEN;
901 mic_len = CCMP_MIC_LEN;
902 break;
903 default:
904 goto no_key;
905 }
906
907 if (skb->len >= mic_len && key->force_sw_encrypt)
908 skb_trim(skb, skb->len - mic_len);
909 if (skb->len >= iv_len && skb->len > hdrlen) {
910 memmove(skb->data + iv_len, skb->data, hdrlen);
911 skb_pull(skb, iv_len);
912 }
913
914 no_key:
915 {
916 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
917 u16 fc = le16_to_cpu(hdr->frame_control);
918 if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
919 fc &= ~IEEE80211_STYPE_QOS_DATA;
920 hdr->frame_control = cpu_to_le16(fc);
921 memmove(skb->data + 2, skb->data, hdrlen - 2);
922 skb_pull(skb, 2);
923 }
924 }
925 }
926
927 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
928 struct ieee80211_tx_status *status)
929 {
930 struct sk_buff *skb2;
931 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
932 struct ieee80211_local *local = hw_to_local(hw);
933 u16 frag, type;
934 u32 msg_type;
935 struct ieee80211_tx_status_rtap_hdr *rthdr;
936 struct ieee80211_sub_if_data *sdata;
937 int monitors;
938
939 if (!status) {
940 printk(KERN_ERR
941 "%s: ieee80211_tx_status called with NULL status\n",
942 local->mdev->name);
943 dev_kfree_skb(skb);
944 return;
945 }
946
947 if (status->excessive_retries) {
948 struct sta_info *sta;
949 sta = sta_info_get(local, hdr->addr1);
950 if (sta) {
951 if (sta->flags & WLAN_STA_PS) {
952 /* The STA is in power save mode, so assume
953 * that this TX packet failed because of that.
954 */
955 status->excessive_retries = 0;
956 status->flags |= IEEE80211_TX_STATUS_TX_FILTERED;
957 }
958 sta_info_put(sta);
959 }
960 }
961
962 if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) {
963 struct sta_info *sta;
964 sta = sta_info_get(local, hdr->addr1);
965 if (sta) {
966 sta->tx_filtered_count++;
967
968 /* Clear the TX filter mask for this STA when sending
969 * the next packet. If the STA went to power save mode,
970 * this will happen when it is waking up for the next
971 * time. */
972 sta->clear_dst_mask = 1;
973
974 /* TODO: Is the WLAN_STA_PS flag always set here or is
975 * the race between RX and TX status causing some
976 * packets to be filtered out before 80211.o gets an
977 * update for PS status? This seems to be the case, so
978 * no changes are likely to be needed. */
979 if (sta->flags & WLAN_STA_PS &&
980 skb_queue_len(&sta->tx_filtered) <
981 STA_MAX_TX_BUFFER) {
982 ieee80211_remove_tx_extra(local, sta->key,
983 skb,
984 &status->control);
985 skb_queue_tail(&sta->tx_filtered, skb);
986 } else if (!(sta->flags & WLAN_STA_PS) &&
987 !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) {
988 /* Software retry the packet once */
989 status->control.flags |= IEEE80211_TXCTL_REQUEUE;
990 ieee80211_remove_tx_extra(local, sta->key,
991 skb,
992 &status->control);
993 dev_queue_xmit(skb);
994 } else {
995 if (net_ratelimit()) {
996 printk(KERN_DEBUG "%s: dropped TX "
997 "filtered frame queue_len=%d "
998 "PS=%d @%lu\n",
999 local->mdev->name,
1000 skb_queue_len(
1001 &sta->tx_filtered),
1002 !!(sta->flags & WLAN_STA_PS),
1003 jiffies);
1004 }
1005 dev_kfree_skb(skb);
1006 }
1007 sta_info_put(sta);
1008 return;
1009 }
1010 } else {
1011 /* FIXME: STUPID to call this with both local and local->mdev */
1012 rate_control_tx_status(local, local->mdev, skb, status);
1013 }
1014
1015 ieee80211_led_tx(local, 0);
1016
1017 /* SNMP counters
1018 * Fragments are passed to low-level drivers as separate skbs, so these
1019 * are actually fragments, not frames. Update frame counters only for
1020 * the first fragment of the frame. */
1021
1022 frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
1023 type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
1024
1025 if (status->flags & IEEE80211_TX_STATUS_ACK) {
1026 if (frag == 0) {
1027 local->dot11TransmittedFrameCount++;
1028 if (is_multicast_ether_addr(hdr->addr1))
1029 local->dot11MulticastTransmittedFrameCount++;
1030 if (status->retry_count > 0)
1031 local->dot11RetryCount++;
1032 if (status->retry_count > 1)
1033 local->dot11MultipleRetryCount++;
1034 }
1035
1036 /* This counter shall be incremented for an acknowledged MPDU
1037 * with an individual address in the address 1 field or an MPDU
1038 * with a multicast address in the address 1 field of type Data
1039 * or Management. */
1040 if (!is_multicast_ether_addr(hdr->addr1) ||
1041 type == IEEE80211_FTYPE_DATA ||
1042 type == IEEE80211_FTYPE_MGMT)
1043 local->dot11TransmittedFragmentCount++;
1044 } else {
1045 if (frag == 0)
1046 local->dot11FailedCount++;
1047 }
1048
1049 msg_type = (status->flags & IEEE80211_TX_STATUS_ACK) ?
1050 ieee80211_msg_tx_callback_ack : ieee80211_msg_tx_callback_fail;
1051
1052 /* this was a transmitted frame, but now we want to reuse it */
1053 skb_orphan(skb);
1054
1055 if ((status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS) &&
1056 local->apdev) {
1057 if (local->monitors) {
1058 skb2 = skb_clone(skb, GFP_ATOMIC);
1059 } else {
1060 skb2 = skb;
1061 skb = NULL;
1062 }
1063
1064 if (skb2)
1065 /* Send frame to hostapd */
1066 ieee80211_rx_mgmt(local, skb2, NULL, msg_type);
1067
1068 if (!skb)
1069 return;
1070 }
1071
1072 if (!local->monitors) {
1073 dev_kfree_skb(skb);
1074 return;
1075 }
1076
1077 /* send frame to monitor interfaces now */
1078
1079 if (skb_headroom(skb) < sizeof(*rthdr)) {
1080 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
1081 dev_kfree_skb(skb);
1082 return;
1083 }
1084
1085 rthdr = (struct ieee80211_tx_status_rtap_hdr*)
1086 skb_push(skb, sizeof(*rthdr));
1087
1088 memset(rthdr, 0, sizeof(*rthdr));
1089 rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
1090 rthdr->hdr.it_present =
1091 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
1092 (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
1093
1094 if (!(status->flags & IEEE80211_TX_STATUS_ACK) &&
1095 !is_multicast_ether_addr(hdr->addr1))
1096 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
1097
1098 if ((status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) &&
1099 (status->control.flags & IEEE80211_TXCTL_USE_CTS_PROTECT))
1100 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
1101 else if (status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS)
1102 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
1103
1104 rthdr->data_retries = status->retry_count;
1105
1106 read_lock(&local->sub_if_lock);
1107 monitors = local->monitors;
1108 list_for_each_entry(sdata, &local->sub_if_list, list) {
1109 /*
1110 * Using the monitors counter is possibly racy, but
1111 * if the value is wrong we simply either clone the skb
1112 * once too much or forget sending it to one monitor iface
1113 * The latter case isn't nice but fixing the race is much
1114 * more complicated.
1115 */
1116 if (!monitors || !skb)
1117 goto out;
1118
1119 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
1120 if (!netif_running(sdata->dev))
1121 continue;
1122 monitors--;
1123 if (monitors)
1124 skb2 = skb_clone(skb, GFP_KERNEL);
1125 else
1126 skb2 = NULL;
1127 skb->dev = sdata->dev;
1128 /* XXX: is this sufficient for BPF? */
1129 skb_set_mac_header(skb, 0);
1130 skb->ip_summed = CHECKSUM_UNNECESSARY;
1131 skb->pkt_type = PACKET_OTHERHOST;
1132 skb->protocol = htons(ETH_P_802_2);
1133 memset(skb->cb, 0, sizeof(skb->cb));
1134 netif_rx(skb);
1135 skb = skb2;
1136 }
1137 }
1138 out:
1139 read_unlock(&local->sub_if_lock);
1140 if (skb)
1141 dev_kfree_skb(skb);
1142 }
1143 EXPORT_SYMBOL(ieee80211_tx_status);
1144
1145 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
1146 const struct ieee80211_ops *ops)
1147 {
1148 struct net_device *mdev;
1149 struct ieee80211_local *local;
1150 struct ieee80211_sub_if_data *sdata;
1151 int priv_size;
1152 struct wiphy *wiphy;
1153
1154 /* Ensure 32-byte alignment of our private data and hw private data.
1155 * We use the wiphy priv data for both our ieee80211_local and for
1156 * the driver's private data
1157 *
1158 * In memory it'll be like this:
1159 *
1160 * +-------------------------+
1161 * | struct wiphy |
1162 * +-------------------------+
1163 * | struct ieee80211_local |
1164 * +-------------------------+
1165 * | driver's private data |
1166 * +-------------------------+
1167 *
1168 */
1169 priv_size = ((sizeof(struct ieee80211_local) +
1170 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
1171 priv_data_len;
1172
1173 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
1174
1175 if (!wiphy)
1176 return NULL;
1177
1178 wiphy->privid = mac80211_wiphy_privid;
1179
1180 local = wiphy_priv(wiphy);
1181 local->hw.wiphy = wiphy;
1182
1183 local->hw.priv = (char *)local +
1184 ((sizeof(struct ieee80211_local) +
1185 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
1186
1187 BUG_ON(!ops->tx);
1188 BUG_ON(!ops->config);
1189 BUG_ON(!ops->add_interface);
1190 local->ops = ops;
1191
1192 /* for now, mdev needs sub_if_data :/ */
1193 mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
1194 "wmaster%d", ether_setup);
1195 if (!mdev) {
1196 wiphy_free(wiphy);
1197 return NULL;
1198 }
1199
1200 sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
1201 mdev->ieee80211_ptr = &sdata->wdev;
1202 sdata->wdev.wiphy = wiphy;
1203
1204 local->hw.queues = 1; /* default */
1205
1206 local->mdev = mdev;
1207 local->rx_pre_handlers = ieee80211_rx_pre_handlers;
1208 local->rx_handlers = ieee80211_rx_handlers;
1209 local->tx_handlers = ieee80211_tx_handlers;
1210
1211 local->bridge_packets = 1;
1212
1213 local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1214 local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1215 local->short_retry_limit = 7;
1216 local->long_retry_limit = 4;
1217 local->hw.conf.radio_enabled = 1;
1218
1219 local->enabled_modes = (unsigned int) -1;
1220
1221 INIT_LIST_HEAD(&local->modes_list);
1222
1223 rwlock_init(&local->sub_if_lock);
1224 INIT_LIST_HEAD(&local->sub_if_list);
1225
1226 INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
1227 ieee80211_rx_bss_list_init(mdev);
1228
1229 sta_info_init(local);
1230
1231 mdev->hard_start_xmit = ieee80211_master_start_xmit;
1232 mdev->open = ieee80211_master_open;
1233 mdev->stop = ieee80211_master_stop;
1234 mdev->type = ARPHRD_IEEE80211;
1235 mdev->hard_header_parse = header_parse_80211;
1236
1237 sdata->type = IEEE80211_IF_TYPE_AP;
1238 sdata->dev = mdev;
1239 sdata->local = local;
1240 sdata->u.ap.force_unicast_rateidx = -1;
1241 sdata->u.ap.max_ratectrl_rateidx = -1;
1242 ieee80211_if_sdata_init(sdata);
1243 list_add_tail(&sdata->list, &local->sub_if_list);
1244
1245 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1246 (unsigned long)local);
1247 tasklet_disable(&local->tx_pending_tasklet);
1248
1249 tasklet_init(&local->tasklet,
1250 ieee80211_tasklet_handler,
1251 (unsigned long) local);
1252 tasklet_disable(&local->tasklet);
1253
1254 skb_queue_head_init(&local->skb_queue);
1255 skb_queue_head_init(&local->skb_queue_unreliable);
1256
1257 return local_to_hw(local);
1258 }
1259 EXPORT_SYMBOL(ieee80211_alloc_hw);
1260
1261 int ieee80211_register_hw(struct ieee80211_hw *hw)
1262 {
1263 struct ieee80211_local *local = hw_to_local(hw);
1264 const char *name;
1265 int result;
1266
1267 result = wiphy_register(local->hw.wiphy);
1268 if (result < 0)
1269 return result;
1270
1271 name = wiphy_dev(local->hw.wiphy)->driver->name;
1272 local->hw.workqueue = create_singlethread_workqueue(name);
1273 if (!local->hw.workqueue) {
1274 result = -ENOMEM;
1275 goto fail_workqueue;
1276 }
1277
1278 /*
1279 * The hardware needs headroom for sending the frame,
1280 * and we need some headroom for passing the frame to monitor
1281 * interfaces, but never both at the same time.
1282 */
1283 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1284 sizeof(struct ieee80211_tx_status_rtap_hdr));
1285
1286 debugfs_hw_add(local);
1287
1288 local->hw.conf.beacon_int = 1000;
1289
1290 local->wstats_flags |= local->hw.max_rssi ?
1291 IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID;
1292 local->wstats_flags |= local->hw.max_signal ?
1293 IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1294 local->wstats_flags |= local->hw.max_noise ?
1295 IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1296 if (local->hw.max_rssi < 0 || local->hw.max_noise < 0)
1297 local->wstats_flags |= IW_QUAL_DBM;
1298
1299 result = sta_info_start(local);
1300 if (result < 0)
1301 goto fail_sta_info;
1302
1303 rtnl_lock();
1304 result = dev_alloc_name(local->mdev, local->mdev->name);
1305 if (result < 0)
1306 goto fail_dev;
1307
1308 memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1309 SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1310
1311 result = register_netdevice(local->mdev);
1312 if (result < 0)
1313 goto fail_dev;
1314
1315 ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1316
1317 result = ieee80211_init_rate_ctrl_alg(local, NULL);
1318 if (result < 0) {
1319 printk(KERN_DEBUG "%s: Failed to initialize rate control "
1320 "algorithm\n", local->mdev->name);
1321 goto fail_rate;
1322 }
1323
1324 result = ieee80211_wep_init(local);
1325
1326 if (result < 0) {
1327 printk(KERN_DEBUG "%s: Failed to initialize wep\n",
1328 local->mdev->name);
1329 goto fail_wep;
1330 }
1331
1332 ieee80211_install_qdisc(local->mdev);
1333
1334 /* add one default STA interface */
1335 result = ieee80211_if_add(local->mdev, "wlan%d", NULL,
1336 IEEE80211_IF_TYPE_STA);
1337 if (result)
1338 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
1339 local->mdev->name);
1340
1341 local->reg_state = IEEE80211_DEV_REGISTERED;
1342 rtnl_unlock();
1343
1344 ieee80211_led_init(local);
1345
1346 return 0;
1347
1348 fail_wep:
1349 rate_control_deinitialize(local);
1350 fail_rate:
1351 ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1352 unregister_netdevice(local->mdev);
1353 fail_dev:
1354 rtnl_unlock();
1355 sta_info_stop(local);
1356 fail_sta_info:
1357 debugfs_hw_del(local);
1358 destroy_workqueue(local->hw.workqueue);
1359 fail_workqueue:
1360 wiphy_unregister(local->hw.wiphy);
1361 return result;
1362 }
1363 EXPORT_SYMBOL(ieee80211_register_hw);
1364
1365 int ieee80211_register_hwmode(struct ieee80211_hw *hw,
1366 struct ieee80211_hw_mode *mode)
1367 {
1368 struct ieee80211_local *local = hw_to_local(hw);
1369 struct ieee80211_rate *rate;
1370 int i;
1371
1372 INIT_LIST_HEAD(&mode->list);
1373 list_add_tail(&mode->list, &local->modes_list);
1374
1375 local->hw_modes |= (1 << mode->mode);
1376 for (i = 0; i < mode->num_rates; i++) {
1377 rate = &(mode->rates[i]);
1378 rate->rate_inv = CHAN_UTIL_RATE_LCM / rate->rate;
1379 }
1380 ieee80211_prepare_rates(local, mode);
1381
1382 if (!local->oper_hw_mode) {
1383 /* Default to this mode */
1384 local->hw.conf.phymode = mode->mode;
1385 local->oper_hw_mode = local->scan_hw_mode = mode;
1386 local->oper_channel = local->scan_channel = &mode->channels[0];
1387 local->hw.conf.mode = local->oper_hw_mode;
1388 local->hw.conf.chan = local->oper_channel;
1389 }
1390
1391 if (!(hw->flags & IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED))
1392 ieee80211_set_default_regdomain(mode);
1393
1394 return 0;
1395 }
1396 EXPORT_SYMBOL(ieee80211_register_hwmode);
1397
1398 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1399 {
1400 struct ieee80211_local *local = hw_to_local(hw);
1401 struct ieee80211_sub_if_data *sdata, *tmp;
1402 struct list_head tmp_list;
1403 int i;
1404
1405 tasklet_kill(&local->tx_pending_tasklet);
1406 tasklet_kill(&local->tasklet);
1407
1408 rtnl_lock();
1409
1410 BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED);
1411
1412 local->reg_state = IEEE80211_DEV_UNREGISTERED;
1413 if (local->apdev)
1414 ieee80211_if_del_mgmt(local);
1415
1416 write_lock_bh(&local->sub_if_lock);
1417 list_replace_init(&local->sub_if_list, &tmp_list);
1418 write_unlock_bh(&local->sub_if_lock);
1419
1420 list_for_each_entry_safe(sdata, tmp, &tmp_list, list)
1421 __ieee80211_if_del(local, sdata);
1422
1423 rtnl_unlock();
1424
1425 ieee80211_rx_bss_list_deinit(local->mdev);
1426 ieee80211_clear_tx_pending(local);
1427 sta_info_stop(local);
1428 rate_control_deinitialize(local);
1429 debugfs_hw_del(local);
1430
1431 for (i = 0; i < NUM_IEEE80211_MODES; i++) {
1432 kfree(local->supp_rates[i]);
1433 kfree(local->basic_rates[i]);
1434 }
1435
1436 if (skb_queue_len(&local->skb_queue)
1437 || skb_queue_len(&local->skb_queue_unreliable))
1438 printk(KERN_WARNING "%s: skb_queue not empty\n",
1439 local->mdev->name);
1440 skb_queue_purge(&local->skb_queue);
1441 skb_queue_purge(&local->skb_queue_unreliable);
1442
1443 destroy_workqueue(local->hw.workqueue);
1444 wiphy_unregister(local->hw.wiphy);
1445 ieee80211_wep_free(local);
1446 ieee80211_led_exit(local);
1447 }
1448 EXPORT_SYMBOL(ieee80211_unregister_hw);
1449
1450 void ieee80211_free_hw(struct ieee80211_hw *hw)
1451 {
1452 struct ieee80211_local *local = hw_to_local(hw);
1453
1454 ieee80211_if_free(local->mdev);
1455 wiphy_free(local->hw.wiphy);
1456 }
1457 EXPORT_SYMBOL(ieee80211_free_hw);
1458
1459 struct net_device_stats *ieee80211_dev_stats(struct net_device *dev)
1460 {
1461 struct ieee80211_sub_if_data *sdata;
1462 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1463 return &sdata->stats;
1464 }
1465
1466 static int __init ieee80211_init(void)
1467 {
1468 struct sk_buff *skb;
1469 int ret;
1470
1471 BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb));
1472
1473 ret = ieee80211_wme_register();
1474 if (ret) {
1475 printk(KERN_DEBUG "ieee80211_init: failed to "
1476 "initialize WME (err=%d)\n", ret);
1477 return ret;
1478 }
1479
1480 ieee80211_debugfs_netdev_init();
1481 ieee80211_regdomain_init();
1482
1483 return 0;
1484 }
1485
1486 static void __exit ieee80211_exit(void)
1487 {
1488 ieee80211_wme_unregister();
1489 ieee80211_debugfs_netdev_exit();
1490 }
1491
1492
1493 subsys_initcall(ieee80211_init);
1494 module_exit(ieee80211_exit);
1495
1496 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1497 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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