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[MAC80211]: remove turbo modes
[linux-2.6/verdex.git] / net / mac80211 / ieee80211.c
blob0e8a70f408e2225f33a1dc482b1713923ea1dd0e
1 /*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11 #include <net/mac80211.h>
12 #include <net/ieee80211_radiotap.h>
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/netdevice.h>
16 #include <linux/types.h>
17 #include <linux/slab.h>
18 #include <linux/skbuff.h>
19 #include <linux/etherdevice.h>
20 #include <linux/if_arp.h>
21 #include <linux/wireless.h>
22 #include <linux/rtnetlink.h>
23 #include <linux/bitmap.h>
24 #include <net/net_namespace.h>
25 #include <net/cfg80211.h>
26
27 #include "ieee80211_common.h"
28 #include "ieee80211_i.h"
29 #include "ieee80211_rate.h"
30 #include "wep.h"
31 #include "wme.h"
32 #include "aes_ccm.h"
33 #include "ieee80211_led.h"
34 #include "ieee80211_cfg.h"
35 #include "debugfs.h"
36 #include "debugfs_netdev.h"
37
38 /*
39 * For seeing transmitted packets on monitor interfaces
40 * we have a radiotap header too.
41 */
42 struct ieee80211_tx_status_rtap_hdr {
43 struct ieee80211_radiotap_header hdr;
44 __le16 tx_flags;
45 u8 data_retries;
46 } __attribute__ ((packed));
47
48 /* common interface routines */
49
50 static struct net_device_stats *ieee80211_get_stats(struct net_device *dev)
51 {
52 struct ieee80211_sub_if_data *sdata;
53 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
54 return &(sdata->stats);
55 }
56
57 static int header_parse_80211(struct sk_buff *skb, unsigned char *haddr)
58 {
59 memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
60 return ETH_ALEN;
61 }
62
63 /* master interface */
64
65 static int ieee80211_master_open(struct net_device *dev)
66 {
67 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
68 struct ieee80211_sub_if_data *sdata;
69 int res = -EOPNOTSUPP;
70
71 read_lock(&local->sub_if_lock);
72 list_for_each_entry(sdata, &local->sub_if_list, list) {
73 if (sdata->dev != dev && netif_running(sdata->dev)) {
74 res = 0;
75 break;
76 }
77 }
78 read_unlock(&local->sub_if_lock);
79 return res;
80 }
81
82 static int ieee80211_master_stop(struct net_device *dev)
83 {
84 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
85 struct ieee80211_sub_if_data *sdata;
86
87 read_lock(&local->sub_if_lock);
88 list_for_each_entry(sdata, &local->sub_if_list, list)
89 if (sdata->dev != dev && netif_running(sdata->dev))
90 dev_close(sdata->dev);
91 read_unlock(&local->sub_if_lock);
92
93 return 0;
94 }
95
96 /* management interface */
97
98 static void
99 ieee80211_fill_frame_info(struct ieee80211_local *local,
100 struct ieee80211_frame_info *fi,
101 struct ieee80211_rx_status *status)
102 {
103 if (status) {
104 struct timespec ts;
105 struct ieee80211_rate *rate;
106
107 jiffies_to_timespec(jiffies, &ts);
108 fi->hosttime = cpu_to_be64((u64) ts.tv_sec * 1000000 +
109 ts.tv_nsec / 1000);
110 fi->mactime = cpu_to_be64(status->mactime);
111 switch (status->phymode) {
112 case MODE_IEEE80211A:
113 fi->phytype = htonl(ieee80211_phytype_ofdm_dot11_a);
114 break;
115 case MODE_IEEE80211B:
116 fi->phytype = htonl(ieee80211_phytype_dsss_dot11_b);
117 break;
118 case MODE_IEEE80211G:
119 fi->phytype = htonl(ieee80211_phytype_pbcc_dot11_g);
120 break;
121 default:
122 fi->phytype = htonl(0xAAAAAAAA);
123 break;
124 }
125 fi->channel = htonl(status->channel);
126 rate = ieee80211_get_rate(local, status->phymode,
127 status->rate);
128 if (rate) {
129 fi->datarate = htonl(rate->rate);
130 if (rate->flags & IEEE80211_RATE_PREAMBLE2) {
131 if (status->rate == rate->val)
132 fi->preamble = htonl(2); /* long */
133 else if (status->rate == rate->val2)
134 fi->preamble = htonl(1); /* short */
135 } else
136 fi->preamble = htonl(0);
137 } else {
138 fi->datarate = htonl(0);
139 fi->preamble = htonl(0);
140 }
141
142 fi->antenna = htonl(status->antenna);
143 fi->priority = htonl(0xffffffff); /* no clue */
144 fi->ssi_type = htonl(ieee80211_ssi_raw);
145 fi->ssi_signal = htonl(status->ssi);
146 fi->ssi_noise = 0x00000000;
147 fi->encoding = 0;
148 } else {
149 /* clear everything because we really don't know.
150 * the msg_type field isn't present on monitor frames
151 * so we don't know whether it will be present or not,
152 * but it's ok to not clear it since it'll be assigned
153 * anyway */
154 memset(fi, 0, sizeof(*fi) - sizeof(fi->msg_type));
155
156 fi->ssi_type = htonl(ieee80211_ssi_none);
157 }
158 fi->version = htonl(IEEE80211_FI_VERSION);
159 fi->length = cpu_to_be32(sizeof(*fi) - sizeof(fi->msg_type));
160 }
161
162 /* this routine is actually not just for this, but also
163 * for pushing fake 'management' frames into userspace.
164 * it shall be replaced by a netlink-based system. */
165 void
166 ieee80211_rx_mgmt(struct ieee80211_local *local, struct sk_buff *skb,
167 struct ieee80211_rx_status *status, u32 msg_type)
168 {
169 struct ieee80211_frame_info *fi;
170 const size_t hlen = sizeof(struct ieee80211_frame_info);
171 struct ieee80211_sub_if_data *sdata;
172
173 skb->dev = local->apdev;
174
175 sdata = IEEE80211_DEV_TO_SUB_IF(local->apdev);
176
177 if (skb_headroom(skb) < hlen) {
178 I802_DEBUG_INC(local->rx_expand_skb_head);
179 if (pskb_expand_head(skb, hlen, 0, GFP_ATOMIC)) {
180 dev_kfree_skb(skb);
181 return;
182 }
183 }
184
185 fi = (struct ieee80211_frame_info *) skb_push(skb, hlen);
186
187 ieee80211_fill_frame_info(local, fi, status);
188 fi->msg_type = htonl(msg_type);
189
190 sdata->stats.rx_packets++;
191 sdata->stats.rx_bytes += skb->len;
192
193 skb_set_mac_header(skb, 0);
194 skb->ip_summed = CHECKSUM_UNNECESSARY;
195 skb->pkt_type = PACKET_OTHERHOST;
196 skb->protocol = htons(ETH_P_802_2);
197 memset(skb->cb, 0, sizeof(skb->cb));
198 netif_rx(skb);
199 }
200
201 void ieee80211_key_threshold_notify(struct net_device *dev,
202 struct ieee80211_key *key,
203 struct sta_info *sta)
204 {
205 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
206 struct sk_buff *skb;
207 struct ieee80211_msg_key_notification *msg;
208
209 /* if no one will get it anyway, don't even allocate it.
210 * unlikely because this is only relevant for APs
211 * where the device must be open... */
212 if (unlikely(!local->apdev))
213 return;
214
215 skb = dev_alloc_skb(sizeof(struct ieee80211_frame_info) +
216 sizeof(struct ieee80211_msg_key_notification));
217 if (!skb)
218 return;
219
220 skb_reserve(skb, sizeof(struct ieee80211_frame_info));
221 msg = (struct ieee80211_msg_key_notification *)
222 skb_put(skb, sizeof(struct ieee80211_msg_key_notification));
223 msg->tx_rx_count = key->tx_rx_count;
224 memcpy(msg->ifname, dev->name, IFNAMSIZ);
225 if (sta)
226 memcpy(msg->addr, sta->addr, ETH_ALEN);
227 else
228 memset(msg->addr, 0xff, ETH_ALEN);
229
230 key->tx_rx_count = 0;
231
232 ieee80211_rx_mgmt(local, skb, NULL,
233 ieee80211_msg_key_threshold_notification);
234 }
235
236 static int ieee80211_mgmt_open(struct net_device *dev)
237 {
238 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
239
240 if (!netif_running(local->mdev))
241 return -EOPNOTSUPP;
242 return 0;
243 }
244
245 static int ieee80211_mgmt_stop(struct net_device *dev)
246 {
247 return 0;
248 }
249
250 static int ieee80211_change_mtu_apdev(struct net_device *dev, int new_mtu)
251 {
252 /* FIX: what would be proper limits for MTU?
253 * This interface uses 802.11 frames. */
254 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN) {
255 printk(KERN_WARNING "%s: invalid MTU %d\n",
256 dev->name, new_mtu);
257 return -EINVAL;
258 }
259
260 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
261 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
262 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
263 dev->mtu = new_mtu;
264 return 0;
265 }
266
267 void ieee80211_if_mgmt_setup(struct net_device *dev)
268 {
269 ether_setup(dev);
270 dev->hard_start_xmit = ieee80211_mgmt_start_xmit;
271 dev->change_mtu = ieee80211_change_mtu_apdev;
272 dev->get_stats = ieee80211_get_stats;
273 dev->open = ieee80211_mgmt_open;
274 dev->stop = ieee80211_mgmt_stop;
275 dev->type = ARPHRD_IEEE80211_PRISM;
276 dev->hard_header_parse = header_parse_80211;
277 dev->uninit = ieee80211_if_reinit;
278 dev->destructor = ieee80211_if_free;
279 }
280
281 /* regular interfaces */
282
283 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
284 {
285 /* FIX: what would be proper limits for MTU?
286 * This interface uses 802.3 frames. */
287 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6) {
288 printk(KERN_WARNING "%s: invalid MTU %d\n",
289 dev->name, new_mtu);
290 return -EINVAL;
291 }
292
293 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
294 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
295 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
296 dev->mtu = new_mtu;
297 return 0;
298 }
299
300 static inline int identical_mac_addr_allowed(int type1, int type2)
301 {
302 return (type1 == IEEE80211_IF_TYPE_MNTR ||
303 type2 == IEEE80211_IF_TYPE_MNTR ||
304 (type1 == IEEE80211_IF_TYPE_AP &&
305 type2 == IEEE80211_IF_TYPE_WDS) ||
306 (type1 == IEEE80211_IF_TYPE_WDS &&
307 (type2 == IEEE80211_IF_TYPE_WDS ||
308 type2 == IEEE80211_IF_TYPE_AP)) ||
309 (type1 == IEEE80211_IF_TYPE_AP &&
310 type2 == IEEE80211_IF_TYPE_VLAN) ||
311 (type1 == IEEE80211_IF_TYPE_VLAN &&
312 (type2 == IEEE80211_IF_TYPE_AP ||
313 type2 == IEEE80211_IF_TYPE_VLAN)));
314 }
315
316 /* Check if running monitor interfaces should go to a "soft monitor" mode
317 * and switch them if necessary. */
318 static inline void ieee80211_start_soft_monitor(struct ieee80211_local *local)
319 {
320 struct ieee80211_if_init_conf conf;
321
322 if (local->open_count && local->open_count == local->monitors &&
323 !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER) &&
324 local->ops->remove_interface) {
325 conf.if_id = -1;
326 conf.type = IEEE80211_IF_TYPE_MNTR;
327 conf.mac_addr = NULL;
328 local->ops->remove_interface(local_to_hw(local), &conf);
329 }
330 }
331
332 /* Check if running monitor interfaces should go to a "hard monitor" mode
333 * and switch them if necessary. */
334 static void ieee80211_start_hard_monitor(struct ieee80211_local *local)
335 {
336 struct ieee80211_if_init_conf conf;
337
338 if (local->open_count && local->open_count == local->monitors &&
339 !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
340 conf.if_id = -1;
341 conf.type = IEEE80211_IF_TYPE_MNTR;
342 conf.mac_addr = NULL;
343 local->ops->add_interface(local_to_hw(local), &conf);
344 }
345 }
346
347 static void ieee80211_if_open(struct net_device *dev)
348 {
349 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
350
351 switch (sdata->type) {
352 case IEEE80211_IF_TYPE_STA:
353 case IEEE80211_IF_TYPE_IBSS:
354 sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET;
355 break;
356 }
357 }
358
359 static int ieee80211_open(struct net_device *dev)
360 {
361 struct ieee80211_sub_if_data *sdata, *nsdata;
362 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
363 struct ieee80211_if_init_conf conf;
364 int res;
365
366 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
367 read_lock(&local->sub_if_lock);
368 list_for_each_entry(nsdata, &local->sub_if_list, list) {
369 struct net_device *ndev = nsdata->dev;
370
371 if (ndev != dev && ndev != local->mdev && netif_running(ndev) &&
372 compare_ether_addr(dev->dev_addr, ndev->dev_addr) == 0 &&
373 !identical_mac_addr_allowed(sdata->type, nsdata->type)) {
374 read_unlock(&local->sub_if_lock);
375 return -ENOTUNIQ;
376 }
377 }
378 read_unlock(&local->sub_if_lock);
379
380 if (sdata->type == IEEE80211_IF_TYPE_WDS &&
381 is_zero_ether_addr(sdata->u.wds.remote_addr))
382 return -ENOLINK;
383
384 if (sdata->type == IEEE80211_IF_TYPE_MNTR && local->open_count &&
385 !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
386 /* run the interface in a "soft monitor" mode */
387 local->monitors++;
388 local->open_count++;
389 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
390 return 0;
391 }
392 ieee80211_if_open(dev);
393 ieee80211_start_soft_monitor(local);
394
395 conf.if_id = dev->ifindex;
396 conf.type = sdata->type;
397 if (sdata->type == IEEE80211_IF_TYPE_MNTR)
398 conf.mac_addr = NULL;
399 else
400 conf.mac_addr = dev->dev_addr;
401 res = local->ops->add_interface(local_to_hw(local), &conf);
402 if (res) {
403 if (sdata->type == IEEE80211_IF_TYPE_MNTR)
404 ieee80211_start_hard_monitor(local);
405 return res;
406 }
407
408 if (local->open_count == 0) {
409 res = 0;
410 tasklet_enable(&local->tx_pending_tasklet);
411 tasklet_enable(&local->tasklet);
412 if (local->ops->open)
413 res = local->ops->open(local_to_hw(local));
414 if (res == 0) {
415 res = dev_open(local->mdev);
416 if (res) {
417 if (local->ops->stop)
418 local->ops->stop(local_to_hw(local));
419 } else {
420 res = ieee80211_hw_config(local);
421 if (res && local->ops->stop)
422 local->ops->stop(local_to_hw(local));
423 else if (!res && local->apdev)
424 dev_open(local->apdev);
425 }
426 }
427 if (res) {
428 if (local->ops->remove_interface)
429 local->ops->remove_interface(local_to_hw(local),
430 &conf);
431 return res;
432 }
433 }
434 local->open_count++;
435
436 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
437 local->monitors++;
438 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
439 } else {
440 ieee80211_if_config(dev);
441 ieee80211_reset_erp_info(dev);
442 ieee80211_enable_keys(sdata);
443 }
444
445 if (sdata->type == IEEE80211_IF_TYPE_STA &&
446 !local->user_space_mlme)
447 netif_carrier_off(dev);
448 else
449 netif_carrier_on(dev);
450
451 netif_start_queue(dev);
452 return 0;
453 }
454
455 static void ieee80211_if_shutdown(struct net_device *dev)
456 {
457 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
458 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
459
460 ASSERT_RTNL();
461 switch (sdata->type) {
462 case IEEE80211_IF_TYPE_STA:
463 case IEEE80211_IF_TYPE_IBSS:
464 sdata->u.sta.state = IEEE80211_DISABLED;
465 del_timer_sync(&sdata->u.sta.timer);
466 /*
467 * Holding the sub_if_lock for writing here blocks
468 * out the receive path and makes sure it's not
469 * currently processing a packet that may get
470 * added to the queue.
471 */
472 write_lock_bh(&local->sub_if_lock);
473 skb_queue_purge(&sdata->u.sta.skb_queue);
474 write_unlock_bh(&local->sub_if_lock);
475
476 if (!local->ops->hw_scan &&
477 local->scan_dev == sdata->dev) {
478 local->sta_scanning = 0;
479 cancel_delayed_work(&local->scan_work);
480 }
481 flush_workqueue(local->hw.workqueue);
482 break;
483 }
484 }
485
486 static int ieee80211_stop(struct net_device *dev)
487 {
488 struct ieee80211_sub_if_data *sdata;
489 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
490
491 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
492
493 if (sdata->type == IEEE80211_IF_TYPE_MNTR &&
494 local->open_count > 1 &&
495 !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
496 /* remove "soft monitor" interface */
497 local->open_count--;
498 local->monitors--;
499 if (!local->monitors)
500 local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
501 return 0;
502 }
503
504 netif_stop_queue(dev);
505 ieee80211_if_shutdown(dev);
506
507 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
508 local->monitors--;
509 if (!local->monitors)
510 local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
511 } else {
512 /* disable all keys for as long as this netdev is down */
513 ieee80211_disable_keys(sdata);
514 }
515
516 local->open_count--;
517 if (local->open_count == 0) {
518 if (netif_running(local->mdev))
519 dev_close(local->mdev);
520 if (local->apdev)
521 dev_close(local->apdev);
522 if (local->ops->stop)
523 local->ops->stop(local_to_hw(local));
524 tasklet_disable(&local->tx_pending_tasklet);
525 tasklet_disable(&local->tasklet);
526 }
527 if (local->ops->remove_interface) {
528 struct ieee80211_if_init_conf conf;
529
530 conf.if_id = dev->ifindex;
531 conf.type = sdata->type;
532 conf.mac_addr = dev->dev_addr;
533 local->ops->remove_interface(local_to_hw(local), &conf);
534 }
535
536 ieee80211_start_hard_monitor(local);
537
538 return 0;
539 }
540
541 enum netif_tx_lock_class {
542 TX_LOCK_NORMAL,
543 TX_LOCK_MASTER,
544 };
545
546 static inline void netif_tx_lock_nested(struct net_device *dev, int subclass)
547 {
548 spin_lock_nested(&dev->_xmit_lock, subclass);
549 dev->xmit_lock_owner = smp_processor_id();
550 }
551
552 static void ieee80211_set_multicast_list(struct net_device *dev)
553 {
554 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
555 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
556 unsigned short flags;
557
558 netif_tx_lock_nested(local->mdev, TX_LOCK_MASTER);
559 if (((dev->flags & IFF_ALLMULTI) != 0) ^
560 ((sdata->flags & IEEE80211_SDATA_ALLMULTI) != 0)) {
561 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
562 local->iff_allmultis--;
563 else
564 local->iff_allmultis++;
565 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
566 }
567 if (((dev->flags & IFF_PROMISC) != 0) ^
568 ((sdata->flags & IEEE80211_SDATA_PROMISC) != 0)) {
569 if (sdata->flags & IEEE80211_SDATA_PROMISC)
570 local->iff_promiscs--;
571 else
572 local->iff_promiscs++;
573 sdata->flags ^= IEEE80211_SDATA_PROMISC;
574 }
575 if (dev->mc_count != sdata->mc_count) {
576 local->mc_count = local->mc_count - sdata->mc_count +
577 dev->mc_count;
578 sdata->mc_count = dev->mc_count;
579 }
580 if (local->ops->set_multicast_list) {
581 flags = local->mdev->flags;
582 if (local->iff_allmultis)
583 flags |= IFF_ALLMULTI;
584 if (local->iff_promiscs)
585 flags |= IFF_PROMISC;
586 read_lock(&local->sub_if_lock);
587 local->ops->set_multicast_list(local_to_hw(local), flags,
588 local->mc_count);
589 read_unlock(&local->sub_if_lock);
590 }
591 netif_tx_unlock(local->mdev);
592 }
593
594 /* Must not be called for mdev and apdev */
595 void ieee80211_if_setup(struct net_device *dev)
596 {
597 ether_setup(dev);
598 dev->hard_start_xmit = ieee80211_subif_start_xmit;
599 dev->wireless_handlers = &ieee80211_iw_handler_def;
600 dev->set_multicast_list = ieee80211_set_multicast_list;
601 dev->change_mtu = ieee80211_change_mtu;
602 dev->get_stats = ieee80211_get_stats;
603 dev->open = ieee80211_open;
604 dev->stop = ieee80211_stop;
605 dev->uninit = ieee80211_if_reinit;
606 dev->destructor = ieee80211_if_free;
607 }
608
609 /* WDS specialties */
610
611 int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr)
612 {
613 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
614 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
615 struct sta_info *sta;
616
617 if (compare_ether_addr(remote_addr, sdata->u.wds.remote_addr) == 0)
618 return 0;
619
620 /* Create STA entry for the new peer */
621 sta = sta_info_add(local, dev, remote_addr, GFP_KERNEL);
622 if (!sta)
623 return -ENOMEM;
624 sta_info_put(sta);
625
626 /* Remove STA entry for the old peer */
627 sta = sta_info_get(local, sdata->u.wds.remote_addr);
628 if (sta) {
629 sta_info_free(sta);
630 sta_info_put(sta);
631 } else {
632 printk(KERN_DEBUG "%s: could not find STA entry for WDS link "
633 "peer " MAC_FMT "\n",
634 dev->name, MAC_ARG(sdata->u.wds.remote_addr));
635 }
636
637 /* Update WDS link data */
638 memcpy(&sdata->u.wds.remote_addr, remote_addr, ETH_ALEN);
639
640 return 0;
641 }
642
643 /* everything else */
644
645 static int __ieee80211_if_config(struct net_device *dev,
646 struct sk_buff *beacon,
647 struct ieee80211_tx_control *control)
648 {
649 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
650 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
651 struct ieee80211_if_conf conf;
652 static u8 scan_bssid[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
653
654 if (!local->ops->config_interface || !netif_running(dev))
655 return 0;
656
657 memset(&conf, 0, sizeof(conf));
658 conf.type = sdata->type;
659 if (sdata->type == IEEE80211_IF_TYPE_STA ||
660 sdata->type == IEEE80211_IF_TYPE_IBSS) {
661 if (local->sta_scanning &&
662 local->scan_dev == dev)
663 conf.bssid = scan_bssid;
664 else
665 conf.bssid = sdata->u.sta.bssid;
666 conf.ssid = sdata->u.sta.ssid;
667 conf.ssid_len = sdata->u.sta.ssid_len;
668 conf.generic_elem = sdata->u.sta.extra_ie;
669 conf.generic_elem_len = sdata->u.sta.extra_ie_len;
670 } else if (sdata->type == IEEE80211_IF_TYPE_AP) {
671 conf.ssid = sdata->u.ap.ssid;
672 conf.ssid_len = sdata->u.ap.ssid_len;
673 conf.generic_elem = sdata->u.ap.generic_elem;
674 conf.generic_elem_len = sdata->u.ap.generic_elem_len;
675 conf.beacon = beacon;
676 conf.beacon_control = control;
677 }
678 return local->ops->config_interface(local_to_hw(local),
679 dev->ifindex, &conf);
680 }
681
682 int ieee80211_if_config(struct net_device *dev)
683 {
684 return __ieee80211_if_config(dev, NULL, NULL);
685 }
686
687 int ieee80211_if_config_beacon(struct net_device *dev)
688 {
689 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
690 struct ieee80211_tx_control control;
691 struct sk_buff *skb;
692
693 if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
694 return 0;
695 skb = ieee80211_beacon_get(local_to_hw(local), dev->ifindex, &control);
696 if (!skb)
697 return -ENOMEM;
698 return __ieee80211_if_config(dev, skb, &control);
699 }
700
701 int ieee80211_hw_config(struct ieee80211_local *local)
702 {
703 struct ieee80211_hw_mode *mode;
704 struct ieee80211_channel *chan;
705 int ret = 0;
706
707 if (local->sta_scanning) {
708 chan = local->scan_channel;
709 mode = local->scan_hw_mode;
710 } else {
711 chan = local->oper_channel;
712 mode = local->oper_hw_mode;
713 }
714
715 local->hw.conf.channel = chan->chan;
716 local->hw.conf.channel_val = chan->val;
717 local->hw.conf.power_level = chan->power_level;
718 local->hw.conf.freq = chan->freq;
719 local->hw.conf.phymode = mode->mode;
720 local->hw.conf.antenna_max = chan->antenna_max;
721 local->hw.conf.chan = chan;
722 local->hw.conf.mode = mode;
723
724 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
725 printk(KERN_DEBUG "HW CONFIG: channel=%d freq=%d "
726 "phymode=%d\n", local->hw.conf.channel, local->hw.conf.freq,
727 local->hw.conf.phymode);
728 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
729
730 if (local->ops->config)
731 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
732
733 return ret;
734 }
735
736 void ieee80211_erp_info_change_notify(struct net_device *dev, u8 changes)
737 {
738 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
739 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
740 if (local->ops->erp_ie_changed)
741 local->ops->erp_ie_changed(local_to_hw(local), changes,
742 !!(sdata->flags & IEEE80211_SDATA_USE_PROTECTION),
743 !(sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE));
744 }
745
746 void ieee80211_reset_erp_info(struct net_device *dev)
747 {
748 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
749
750 sdata->flags &= ~(IEEE80211_SDATA_USE_PROTECTION |
751 IEEE80211_SDATA_SHORT_PREAMBLE);
752 ieee80211_erp_info_change_notify(dev,
753 IEEE80211_ERP_CHANGE_PROTECTION |
754 IEEE80211_ERP_CHANGE_PREAMBLE);
755 }
756
757 struct dev_mc_list *ieee80211_get_mc_list_item(struct ieee80211_hw *hw,
758 struct dev_mc_list *prev,
759 void **ptr)
760 {
761 struct ieee80211_local *local = hw_to_local(hw);
762 struct ieee80211_sub_if_data *sdata = *ptr;
763 struct dev_mc_list *mc;
764
765 if (!prev) {
766 WARN_ON(sdata);
767 sdata = NULL;
768 }
769 if (!prev || !prev->next) {
770 if (sdata)
771 sdata = list_entry(sdata->list.next,
772 struct ieee80211_sub_if_data, list);
773 else
774 sdata = list_entry(local->sub_if_list.next,
775 struct ieee80211_sub_if_data, list);
776 if (&sdata->list != &local->sub_if_list)
777 mc = sdata->dev->mc_list;
778 else
779 mc = NULL;
780 } else
781 mc = prev->next;
782
783 *ptr = sdata;
784 return mc;
785 }
786 EXPORT_SYMBOL(ieee80211_get_mc_list_item);
787
788 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
789 struct sk_buff *skb,
790 struct ieee80211_tx_status *status)
791 {
792 struct ieee80211_local *local = hw_to_local(hw);
793 struct ieee80211_tx_status *saved;
794 int tmp;
795
796 skb->dev = local->mdev;
797 saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC);
798 if (unlikely(!saved)) {
799 if (net_ratelimit())
800 printk(KERN_WARNING "%s: Not enough memory, "
801 "dropping tx status", skb->dev->name);
802 /* should be dev_kfree_skb_irq, but due to this function being
803 * named _irqsafe instead of just _irq we can't be sure that
804 * people won't call it from non-irq contexts */
805 dev_kfree_skb_any(skb);
806 return;
807 }
808 memcpy(saved, status, sizeof(struct ieee80211_tx_status));
809 /* copy pointer to saved status into skb->cb for use by tasklet */
810 memcpy(skb->cb, &saved, sizeof(saved));
811
812 skb->pkt_type = IEEE80211_TX_STATUS_MSG;
813 skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ?
814 &local->skb_queue : &local->skb_queue_unreliable, skb);
815 tmp = skb_queue_len(&local->skb_queue) +
816 skb_queue_len(&local->skb_queue_unreliable);
817 while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
818 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
819 memcpy(&saved, skb->cb, sizeof(saved));
820 kfree(saved);
821 dev_kfree_skb_irq(skb);
822 tmp--;
823 I802_DEBUG_INC(local->tx_status_drop);
824 }
825 tasklet_schedule(&local->tasklet);
826 }
827 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
828
829 static void ieee80211_tasklet_handler(unsigned long data)
830 {
831 struct ieee80211_local *local = (struct ieee80211_local *) data;
832 struct sk_buff *skb;
833 struct ieee80211_rx_status rx_status;
834 struct ieee80211_tx_status *tx_status;
835
836 while ((skb = skb_dequeue(&local->skb_queue)) ||
837 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
838 switch (skb->pkt_type) {
839 case IEEE80211_RX_MSG:
840 /* status is in skb->cb */
841 memcpy(&rx_status, skb->cb, sizeof(rx_status));
842 /* Clear skb->type in order to not confuse kernel
843 * netstack. */
844 skb->pkt_type = 0;
845 __ieee80211_rx(local_to_hw(local), skb, &rx_status);
846 break;
847 case IEEE80211_TX_STATUS_MSG:
848 /* get pointer to saved status out of skb->cb */
849 memcpy(&tx_status, skb->cb, sizeof(tx_status));
850 skb->pkt_type = 0;
851 ieee80211_tx_status(local_to_hw(local),
852 skb, tx_status);
853 kfree(tx_status);
854 break;
855 default: /* should never get here! */
856 printk(KERN_ERR "%s: Unknown message type (%d)\n",
857 local->mdev->name, skb->pkt_type);
858 dev_kfree_skb(skb);
859 break;
860 }
861 }
862 }
863
864 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
865 * make a prepared TX frame (one that has been given to hw) to look like brand
866 * new IEEE 802.11 frame that is ready to go through TX processing again.
867 * Also, tx_packet_data in cb is restored from tx_control. */
868 static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
869 struct ieee80211_key *key,
870 struct sk_buff *skb,
871 struct ieee80211_tx_control *control)
872 {
873 int hdrlen, iv_len, mic_len;
874 struct ieee80211_tx_packet_data *pkt_data;
875
876 pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
877 pkt_data->ifindex = control->ifindex;
878 pkt_data->flags = 0;
879 if (control->flags & IEEE80211_TXCTL_REQ_TX_STATUS)
880 pkt_data->flags |= IEEE80211_TXPD_REQ_TX_STATUS;
881 if (control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT)
882 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
883 if (control->flags & IEEE80211_TXCTL_REQUEUE)
884 pkt_data->flags |= IEEE80211_TXPD_REQUEUE;
885 if (control->type == IEEE80211_IF_TYPE_MGMT)
886 pkt_data->flags |= IEEE80211_TXPD_MGMT_IFACE;
887 pkt_data->queue = control->queue;
888
889 hdrlen = ieee80211_get_hdrlen_from_skb(skb);
890
891 if (!key)
892 goto no_key;
893
894 switch (key->conf.alg) {
895 case ALG_WEP:
896 iv_len = WEP_IV_LEN;
897 mic_len = WEP_ICV_LEN;
898 break;
899 case ALG_TKIP:
900 iv_len = TKIP_IV_LEN;
901 mic_len = TKIP_ICV_LEN;
902 break;
903 case ALG_CCMP:
904 iv_len = CCMP_HDR_LEN;
905 mic_len = CCMP_MIC_LEN;
906 break;
907 default:
908 goto no_key;
909 }
910
911 if (skb->len >= mic_len &&
912 !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
913 skb_trim(skb, skb->len - mic_len);
914 if (skb->len >= iv_len && skb->len > hdrlen) {
915 memmove(skb->data + iv_len, skb->data, hdrlen);
916 skb_pull(skb, iv_len);
917 }
918
919 no_key:
920 {
921 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
922 u16 fc = le16_to_cpu(hdr->frame_control);
923 if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
924 fc &= ~IEEE80211_STYPE_QOS_DATA;
925 hdr->frame_control = cpu_to_le16(fc);
926 memmove(skb->data + 2, skb->data, hdrlen - 2);
927 skb_pull(skb, 2);
928 }
929 }
930 }
931
932 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
933 struct ieee80211_tx_status *status)
934 {
935 struct sk_buff *skb2;
936 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
937 struct ieee80211_local *local = hw_to_local(hw);
938 u16 frag, type;
939 u32 msg_type;
940 struct ieee80211_tx_status_rtap_hdr *rthdr;
941 struct ieee80211_sub_if_data *sdata;
942 int monitors;
943
944 if (!status) {
945 printk(KERN_ERR
946 "%s: ieee80211_tx_status called with NULL status\n",
947 local->mdev->name);
948 dev_kfree_skb(skb);
949 return;
950 }
951
952 if (status->excessive_retries) {
953 struct sta_info *sta;
954 sta = sta_info_get(local, hdr->addr1);
955 if (sta) {
956 if (sta->flags & WLAN_STA_PS) {
957 /* The STA is in power save mode, so assume
958 * that this TX packet failed because of that.
959 */
960 status->excessive_retries = 0;
961 status->flags |= IEEE80211_TX_STATUS_TX_FILTERED;
962 }
963 sta_info_put(sta);
964 }
965 }
966
967 if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) {
968 struct sta_info *sta;
969 sta = sta_info_get(local, hdr->addr1);
970 if (sta) {
971 sta->tx_filtered_count++;
972
973 /* Clear the TX filter mask for this STA when sending
974 * the next packet. If the STA went to power save mode,
975 * this will happen when it is waking up for the next
976 * time. */
977 sta->clear_dst_mask = 1;
978
979 /* TODO: Is the WLAN_STA_PS flag always set here or is
980 * the race between RX and TX status causing some
981 * packets to be filtered out before 80211.o gets an
982 * update for PS status? This seems to be the case, so
983 * no changes are likely to be needed. */
984 if (sta->flags & WLAN_STA_PS &&
985 skb_queue_len(&sta->tx_filtered) <
986 STA_MAX_TX_BUFFER) {
987 ieee80211_remove_tx_extra(local, sta->key,
988 skb,
989 &status->control);
990 skb_queue_tail(&sta->tx_filtered, skb);
991 } else if (!(sta->flags & WLAN_STA_PS) &&
992 !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) {
993 /* Software retry the packet once */
994 status->control.flags |= IEEE80211_TXCTL_REQUEUE;
995 ieee80211_remove_tx_extra(local, sta->key,
996 skb,
997 &status->control);
998 dev_queue_xmit(skb);
999 } else {
1000 if (net_ratelimit()) {
1001 printk(KERN_DEBUG "%s: dropped TX "
1002 "filtered frame queue_len=%d "
1003 "PS=%d @%lu\n",
1004 local->mdev->name,
1005 skb_queue_len(
1006 &sta->tx_filtered),
1007 !!(sta->flags & WLAN_STA_PS),
1008 jiffies);
1009 }
1010 dev_kfree_skb(skb);
1011 }
1012 sta_info_put(sta);
1013 return;
1014 }
1015 } else {
1016 /* FIXME: STUPID to call this with both local and local->mdev */
1017 rate_control_tx_status(local, local->mdev, skb, status);
1018 }
1019
1020 ieee80211_led_tx(local, 0);
1021
1022 /* SNMP counters
1023 * Fragments are passed to low-level drivers as separate skbs, so these
1024 * are actually fragments, not frames. Update frame counters only for
1025 * the first fragment of the frame. */
1026
1027 frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
1028 type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
1029
1030 if (status->flags & IEEE80211_TX_STATUS_ACK) {
1031 if (frag == 0) {
1032 local->dot11TransmittedFrameCount++;
1033 if (is_multicast_ether_addr(hdr->addr1))
1034 local->dot11MulticastTransmittedFrameCount++;
1035 if (status->retry_count > 0)
1036 local->dot11RetryCount++;
1037 if (status->retry_count > 1)
1038 local->dot11MultipleRetryCount++;
1039 }
1040
1041 /* This counter shall be incremented for an acknowledged MPDU
1042 * with an individual address in the address 1 field or an MPDU
1043 * with a multicast address in the address 1 field of type Data
1044 * or Management. */
1045 if (!is_multicast_ether_addr(hdr->addr1) ||
1046 type == IEEE80211_FTYPE_DATA ||
1047 type == IEEE80211_FTYPE_MGMT)
1048 local->dot11TransmittedFragmentCount++;
1049 } else {
1050 if (frag == 0)
1051 local->dot11FailedCount++;
1052 }
1053
1054 msg_type = (status->flags & IEEE80211_TX_STATUS_ACK) ?
1055 ieee80211_msg_tx_callback_ack : ieee80211_msg_tx_callback_fail;
1056
1057 /* this was a transmitted frame, but now we want to reuse it */
1058 skb_orphan(skb);
1059
1060 if ((status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS) &&
1061 local->apdev) {
1062 if (local->monitors) {
1063 skb2 = skb_clone(skb, GFP_ATOMIC);
1064 } else {
1065 skb2 = skb;
1066 skb = NULL;
1067 }
1068
1069 if (skb2)
1070 /* Send frame to hostapd */
1071 ieee80211_rx_mgmt(local, skb2, NULL, msg_type);
1072
1073 if (!skb)
1074 return;
1075 }
1076
1077 if (!local->monitors) {
1078 dev_kfree_skb(skb);
1079 return;
1080 }
1081
1082 /* send frame to monitor interfaces now */
1083
1084 if (skb_headroom(skb) < sizeof(*rthdr)) {
1085 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
1086 dev_kfree_skb(skb);
1087 return;
1088 }
1089
1090 rthdr = (struct ieee80211_tx_status_rtap_hdr*)
1091 skb_push(skb, sizeof(*rthdr));
1092
1093 memset(rthdr, 0, sizeof(*rthdr));
1094 rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
1095 rthdr->hdr.it_present =
1096 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
1097 (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
1098
1099 if (!(status->flags & IEEE80211_TX_STATUS_ACK) &&
1100 !is_multicast_ether_addr(hdr->addr1))
1101 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
1102
1103 if ((status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) &&
1104 (status->control.flags & IEEE80211_TXCTL_USE_CTS_PROTECT))
1105 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
1106 else if (status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS)
1107 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
1108
1109 rthdr->data_retries = status->retry_count;
1110
1111 read_lock(&local->sub_if_lock);
1112 monitors = local->monitors;
1113 list_for_each_entry(sdata, &local->sub_if_list, list) {
1114 /*
1115 * Using the monitors counter is possibly racy, but
1116 * if the value is wrong we simply either clone the skb
1117 * once too much or forget sending it to one monitor iface
1118 * The latter case isn't nice but fixing the race is much
1119 * more complicated.
1120 */
1121 if (!monitors || !skb)
1122 goto out;
1123
1124 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
1125 if (!netif_running(sdata->dev))
1126 continue;
1127 monitors--;
1128 if (monitors)
1129 skb2 = skb_clone(skb, GFP_KERNEL);
1130 else
1131 skb2 = NULL;
1132 skb->dev = sdata->dev;
1133 /* XXX: is this sufficient for BPF? */
1134 skb_set_mac_header(skb, 0);
1135 skb->ip_summed = CHECKSUM_UNNECESSARY;
1136 skb->pkt_type = PACKET_OTHERHOST;
1137 skb->protocol = htons(ETH_P_802_2);
1138 memset(skb->cb, 0, sizeof(skb->cb));
1139 netif_rx(skb);
1140 skb = skb2;
1141 }
1142 }
1143 out:
1144 read_unlock(&local->sub_if_lock);
1145 if (skb)
1146 dev_kfree_skb(skb);
1147 }
1148 EXPORT_SYMBOL(ieee80211_tx_status);
1149
1150 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
1151 const struct ieee80211_ops *ops)
1152 {
1153 struct net_device *mdev;
1154 struct ieee80211_local *local;
1155 struct ieee80211_sub_if_data *sdata;
1156 int priv_size;
1157 struct wiphy *wiphy;
1158
1159 /* Ensure 32-byte alignment of our private data and hw private data.
1160 * We use the wiphy priv data for both our ieee80211_local and for
1161 * the driver's private data
1162 *
1163 * In memory it'll be like this:
1164 *
1165 * +-------------------------+
1166 * | struct wiphy |
1167 * +-------------------------+
1168 * | struct ieee80211_local |
1169 * +-------------------------+
1170 * | driver's private data |
1171 * +-------------------------+
1172 *
1173 */
1174 priv_size = ((sizeof(struct ieee80211_local) +
1175 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
1176 priv_data_len;
1177
1178 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
1179
1180 if (!wiphy)
1181 return NULL;
1182
1183 wiphy->privid = mac80211_wiphy_privid;
1184
1185 local = wiphy_priv(wiphy);
1186 local->hw.wiphy = wiphy;
1187
1188 local->hw.priv = (char *)local +
1189 ((sizeof(struct ieee80211_local) +
1190 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
1191
1192 BUG_ON(!ops->tx);
1193 BUG_ON(!ops->config);
1194 BUG_ON(!ops->add_interface);
1195 local->ops = ops;
1196
1197 /* for now, mdev needs sub_if_data :/ */
1198 mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
1199 "wmaster%d", ether_setup);
1200 if (!mdev) {
1201 wiphy_free(wiphy);
1202 return NULL;
1203 }
1204
1205 sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
1206 mdev->ieee80211_ptr = &sdata->wdev;
1207 sdata->wdev.wiphy = wiphy;
1208
1209 local->hw.queues = 1; /* default */
1210
1211 local->mdev = mdev;
1212 local->rx_pre_handlers = ieee80211_rx_pre_handlers;
1213 local->rx_handlers = ieee80211_rx_handlers;
1214 local->tx_handlers = ieee80211_tx_handlers;
1215
1216 local->bridge_packets = 1;
1217
1218 local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1219 local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1220 local->short_retry_limit = 7;
1221 local->long_retry_limit = 4;
1222 local->hw.conf.radio_enabled = 1;
1223
1224 local->enabled_modes = ~0;
1225
1226 INIT_LIST_HEAD(&local->modes_list);
1227
1228 rwlock_init(&local->sub_if_lock);
1229 INIT_LIST_HEAD(&local->sub_if_list);
1230
1231 INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
1232 ieee80211_rx_bss_list_init(mdev);
1233
1234 sta_info_init(local);
1235
1236 mdev->hard_start_xmit = ieee80211_master_start_xmit;
1237 mdev->open = ieee80211_master_open;
1238 mdev->stop = ieee80211_master_stop;
1239 mdev->type = ARPHRD_IEEE80211;
1240 mdev->hard_header_parse = header_parse_80211;
1241
1242 sdata->type = IEEE80211_IF_TYPE_AP;
1243 sdata->dev = mdev;
1244 sdata->local = local;
1245 sdata->u.ap.force_unicast_rateidx = -1;
1246 sdata->u.ap.max_ratectrl_rateidx = -1;
1247 ieee80211_if_sdata_init(sdata);
1248 list_add_tail(&sdata->list, &local->sub_if_list);
1249
1250 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1251 (unsigned long)local);
1252 tasklet_disable(&local->tx_pending_tasklet);
1253
1254 tasklet_init(&local->tasklet,
1255 ieee80211_tasklet_handler,
1256 (unsigned long) local);
1257 tasklet_disable(&local->tasklet);
1258
1259 skb_queue_head_init(&local->skb_queue);
1260 skb_queue_head_init(&local->skb_queue_unreliable);
1261
1262 return local_to_hw(local);
1263 }
1264 EXPORT_SYMBOL(ieee80211_alloc_hw);
1265
1266 int ieee80211_register_hw(struct ieee80211_hw *hw)
1267 {
1268 struct ieee80211_local *local = hw_to_local(hw);
1269 const char *name;
1270 int result;
1271
1272 result = wiphy_register(local->hw.wiphy);
1273 if (result < 0)
1274 return result;
1275
1276 name = wiphy_dev(local->hw.wiphy)->driver->name;
1277 local->hw.workqueue = create_singlethread_workqueue(name);
1278 if (!local->hw.workqueue) {
1279 result = -ENOMEM;
1280 goto fail_workqueue;
1281 }
1282
1283 /*
1284 * The hardware needs headroom for sending the frame,
1285 * and we need some headroom for passing the frame to monitor
1286 * interfaces, but never both at the same time.
1287 */
1288 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1289 sizeof(struct ieee80211_tx_status_rtap_hdr));
1290
1291 debugfs_hw_add(local);
1292
1293 local->hw.conf.beacon_int = 1000;
1294
1295 local->wstats_flags |= local->hw.max_rssi ?
1296 IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID;
1297 local->wstats_flags |= local->hw.max_signal ?
1298 IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1299 local->wstats_flags |= local->hw.max_noise ?
1300 IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1301 if (local->hw.max_rssi < 0 || local->hw.max_noise < 0)
1302 local->wstats_flags |= IW_QUAL_DBM;
1303
1304 result = sta_info_start(local);
1305 if (result < 0)
1306 goto fail_sta_info;
1307
1308 rtnl_lock();
1309 result = dev_alloc_name(local->mdev, local->mdev->name);
1310 if (result < 0)
1311 goto fail_dev;
1312
1313 memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1314 SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1315
1316 result = register_netdevice(local->mdev);
1317 if (result < 0)
1318 goto fail_dev;
1319
1320 ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1321
1322 result = ieee80211_init_rate_ctrl_alg(local, NULL);
1323 if (result < 0) {
1324 printk(KERN_DEBUG "%s: Failed to initialize rate control "
1325 "algorithm\n", local->mdev->name);
1326 goto fail_rate;
1327 }
1328
1329 result = ieee80211_wep_init(local);
1330
1331 if (result < 0) {
1332 printk(KERN_DEBUG "%s: Failed to initialize wep\n",
1333 local->mdev->name);
1334 goto fail_wep;
1335 }
1336
1337 ieee80211_install_qdisc(local->mdev);
1338
1339 /* add one default STA interface */
1340 result = ieee80211_if_add(local->mdev, "wlan%d", NULL,
1341 IEEE80211_IF_TYPE_STA);
1342 if (result)
1343 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
1344 local->mdev->name);
1345
1346 local->reg_state = IEEE80211_DEV_REGISTERED;
1347 rtnl_unlock();
1348
1349 ieee80211_led_init(local);
1350
1351 return 0;
1352
1353 fail_wep:
1354 rate_control_deinitialize(local);
1355 fail_rate:
1356 ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1357 unregister_netdevice(local->mdev);
1358 fail_dev:
1359 rtnl_unlock();
1360 sta_info_stop(local);
1361 fail_sta_info:
1362 debugfs_hw_del(local);
1363 destroy_workqueue(local->hw.workqueue);
1364 fail_workqueue:
1365 wiphy_unregister(local->hw.wiphy);
1366 return result;
1367 }
1368 EXPORT_SYMBOL(ieee80211_register_hw);
1369
1370 int ieee80211_register_hwmode(struct ieee80211_hw *hw,
1371 struct ieee80211_hw_mode *mode)
1372 {
1373 struct ieee80211_local *local = hw_to_local(hw);
1374 struct ieee80211_rate *rate;
1375 int i;
1376
1377 INIT_LIST_HEAD(&mode->list);
1378 list_add_tail(&mode->list, &local->modes_list);
1379
1380 local->hw_modes |= (1 << mode->mode);
1381 for (i = 0; i < mode->num_rates; i++) {
1382 rate = &(mode->rates[i]);
1383 rate->rate_inv = CHAN_UTIL_RATE_LCM / rate->rate;
1384 }
1385 ieee80211_prepare_rates(local, mode);
1386
1387 if (!local->oper_hw_mode) {
1388 /* Default to this mode */
1389 local->hw.conf.phymode = mode->mode;
1390 local->oper_hw_mode = local->scan_hw_mode = mode;
1391 local->oper_channel = local->scan_channel = &mode->channels[0];
1392 local->hw.conf.mode = local->oper_hw_mode;
1393 local->hw.conf.chan = local->oper_channel;
1394 }
1395
1396 if (!(hw->flags & IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED))
1397 ieee80211_set_default_regdomain(mode);
1398
1399 return 0;
1400 }
1401 EXPORT_SYMBOL(ieee80211_register_hwmode);
1402
1403 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1404 {
1405 struct ieee80211_local *local = hw_to_local(hw);
1406 struct ieee80211_sub_if_data *sdata, *tmp;
1407 struct list_head tmp_list;
1408 int i;
1409
1410 tasklet_kill(&local->tx_pending_tasklet);
1411 tasklet_kill(&local->tasklet);
1412
1413 rtnl_lock();
1414
1415 BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED);
1416
1417 local->reg_state = IEEE80211_DEV_UNREGISTERED;
1418 if (local->apdev)
1419 ieee80211_if_del_mgmt(local);
1420
1421 write_lock_bh(&local->sub_if_lock);
1422 list_replace_init(&local->sub_if_list, &tmp_list);
1423 write_unlock_bh(&local->sub_if_lock);
1424
1425 list_for_each_entry_safe(sdata, tmp, &tmp_list, list)
1426 __ieee80211_if_del(local, sdata);
1427
1428 rtnl_unlock();
1429
1430 ieee80211_rx_bss_list_deinit(local->mdev);
1431 ieee80211_clear_tx_pending(local);
1432 sta_info_stop(local);
1433 rate_control_deinitialize(local);
1434 debugfs_hw_del(local);
1435
1436 for (i = 0; i < NUM_IEEE80211_MODES; i++) {
1437 kfree(local->supp_rates[i]);
1438 kfree(local->basic_rates[i]);
1439 }
1440
1441 if (skb_queue_len(&local->skb_queue)
1442 || skb_queue_len(&local->skb_queue_unreliable))
1443 printk(KERN_WARNING "%s: skb_queue not empty\n",
1444 local->mdev->name);
1445 skb_queue_purge(&local->skb_queue);
1446 skb_queue_purge(&local->skb_queue_unreliable);
1447
1448 destroy_workqueue(local->hw.workqueue);
1449 wiphy_unregister(local->hw.wiphy);
1450 ieee80211_wep_free(local);
1451 ieee80211_led_exit(local);
1452 }
1453 EXPORT_SYMBOL(ieee80211_unregister_hw);
1454
1455 void ieee80211_free_hw(struct ieee80211_hw *hw)
1456 {
1457 struct ieee80211_local *local = hw_to_local(hw);
1458
1459 ieee80211_if_free(local->mdev);
1460 wiphy_free(local->hw.wiphy);
1461 }
1462 EXPORT_SYMBOL(ieee80211_free_hw);
1463
1464 struct net_device_stats *ieee80211_dev_stats(struct net_device *dev)
1465 {
1466 struct ieee80211_sub_if_data *sdata;
1467 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1468 return &sdata->stats;
1469 }
1470
1471 static int __init ieee80211_init(void)
1472 {
1473 struct sk_buff *skb;
1474 int ret;
1475
1476 BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb));
1477
1478 ret = ieee80211_wme_register();
1479 if (ret) {
1480 printk(KERN_DEBUG "ieee80211_init: failed to "
1481 "initialize WME (err=%d)\n", ret);
1482 return ret;
1483 }
1484
1485 ieee80211_debugfs_netdev_init();
1486 ieee80211_regdomain_init();
1487
1488 return 0;
1489 }
1490
1491 static void __exit ieee80211_exit(void)
1492 {
1493 ieee80211_wme_unregister();
1494 ieee80211_debugfs_netdev_exit();
1495 }
1496
1497
1498 subsys_initcall(ieee80211_init);
1499 module_exit(ieee80211_exit);
1500
1501 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1502 MODULE_LICENSE("GPL");
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