blob: 506cfa06b18415f01cfa5f118b092f73ded0e6e6 [file] [log] [blame]
Jiri Bencf0706e82007-05-05 11:45:53 -07001/*
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>
Jiri Bencf0706e82007-05-05 11:45:53 -070023#include <linux/bitmap.h>
Eric W. Biederman881d9662007-09-17 11:56:21 -070024#include <net/net_namespace.h>
Jiri Bencf0706e82007-05-05 11:45:53 -070025#include <net/cfg80211.h>
26
27#include "ieee80211_common.h"
28#include "ieee80211_i.h"
29#include "ieee80211_rate.h"
30#include "wep.h"
Jiri Bencf0706e82007-05-05 11:45:53 -070031#include "wme.h"
32#include "aes_ccm.h"
33#include "ieee80211_led.h"
34#include "ieee80211_cfg.h"
Jiri Bence9f207f2007-05-05 11:46:38 -070035#include "debugfs.h"
36#include "debugfs_netdev.h"
Jiri Bencf0706e82007-05-05 11:45:53 -070037
Johannes Bergb306f452007-07-10 19:32:08 +020038/*
39 * For seeing transmitted packets on monitor interfaces
40 * we have a radiotap header too.
41 */
42struct ieee80211_tx_status_rtap_hdr {
43 struct ieee80211_radiotap_header hdr;
44 __le16 tx_flags;
45 u8 data_retries;
46} __attribute__ ((packed));
47
Johannes Bergb2c258f2007-07-27 15:43:23 +020048/* common interface routines */
Jiri Bencf0706e82007-05-05 11:45:53 -070049
50static 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
Johannes Bergb2c258f2007-07-27 15:43:23 +020057static int header_parse_80211(struct sk_buff *skb, unsigned char *haddr)
Jiri Bencf0706e82007-05-05 11:45:53 -070058{
Johannes Bergb2c258f2007-07-27 15:43:23 +020059 memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
60 return ETH_ALEN;
Jiri Bencf0706e82007-05-05 11:45:53 -070061}
62
Johannes Bergb2c258f2007-07-27 15:43:23 +020063/* master interface */
Jiri Bencf0706e82007-05-05 11:45:53 -070064
65static 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
82static 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
Johannes Bergb2c258f2007-07-27 15:43:23 +020096/* management interface */
Jiri Bencf0706e82007-05-05 11:45:53 -070097
98static void
99ieee80211_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 case MODE_ATHEROS_TURBO:
122 fi->phytype =
123 htonl(ieee80211_phytype_dsss_dot11_turbo);
124 break;
125 default:
126 fi->phytype = htonl(0xAAAAAAAA);
127 break;
128 }
129 fi->channel = htonl(status->channel);
130 rate = ieee80211_get_rate(local, status->phymode,
131 status->rate);
132 if (rate) {
133 fi->datarate = htonl(rate->rate);
134 if (rate->flags & IEEE80211_RATE_PREAMBLE2) {
135 if (status->rate == rate->val)
136 fi->preamble = htonl(2); /* long */
137 else if (status->rate == rate->val2)
138 fi->preamble = htonl(1); /* short */
139 } else
140 fi->preamble = htonl(0);
141 } else {
142 fi->datarate = htonl(0);
143 fi->preamble = htonl(0);
144 }
145
146 fi->antenna = htonl(status->antenna);
147 fi->priority = htonl(0xffffffff); /* no clue */
148 fi->ssi_type = htonl(ieee80211_ssi_raw);
149 fi->ssi_signal = htonl(status->ssi);
150 fi->ssi_noise = 0x00000000;
151 fi->encoding = 0;
152 } else {
153 /* clear everything because we really don't know.
154 * the msg_type field isn't present on monitor frames
155 * so we don't know whether it will be present or not,
156 * but it's ok to not clear it since it'll be assigned
157 * anyway */
158 memset(fi, 0, sizeof(*fi) - sizeof(fi->msg_type));
159
160 fi->ssi_type = htonl(ieee80211_ssi_none);
161 }
162 fi->version = htonl(IEEE80211_FI_VERSION);
163 fi->length = cpu_to_be32(sizeof(*fi) - sizeof(fi->msg_type));
164}
165
166/* this routine is actually not just for this, but also
167 * for pushing fake 'management' frames into userspace.
168 * it shall be replaced by a netlink-based system. */
169void
170ieee80211_rx_mgmt(struct ieee80211_local *local, struct sk_buff *skb,
171 struct ieee80211_rx_status *status, u32 msg_type)
172{
173 struct ieee80211_frame_info *fi;
174 const size_t hlen = sizeof(struct ieee80211_frame_info);
175 struct ieee80211_sub_if_data *sdata;
176
177 skb->dev = local->apdev;
178
179 sdata = IEEE80211_DEV_TO_SUB_IF(local->apdev);
180
181 if (skb_headroom(skb) < hlen) {
182 I802_DEBUG_INC(local->rx_expand_skb_head);
183 if (pskb_expand_head(skb, hlen, 0, GFP_ATOMIC)) {
184 dev_kfree_skb(skb);
185 return;
186 }
187 }
188
189 fi = (struct ieee80211_frame_info *) skb_push(skb, hlen);
190
191 ieee80211_fill_frame_info(local, fi, status);
192 fi->msg_type = htonl(msg_type);
193
194 sdata->stats.rx_packets++;
195 sdata->stats.rx_bytes += skb->len;
196
197 skb_set_mac_header(skb, 0);
198 skb->ip_summed = CHECKSUM_UNNECESSARY;
199 skb->pkt_type = PACKET_OTHERHOST;
200 skb->protocol = htons(ETH_P_802_2);
201 memset(skb->cb, 0, sizeof(skb->cb));
202 netif_rx(skb);
203}
204
Johannes Bergb2c258f2007-07-27 15:43:23 +0200205void ieee80211_key_threshold_notify(struct net_device *dev,
206 struct ieee80211_key *key,
207 struct sta_info *sta)
208{
209 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
210 struct sk_buff *skb;
211 struct ieee80211_msg_key_notification *msg;
212
213 /* if no one will get it anyway, don't even allocate it.
214 * unlikely because this is only relevant for APs
215 * where the device must be open... */
216 if (unlikely(!local->apdev))
217 return;
218
219 skb = dev_alloc_skb(sizeof(struct ieee80211_frame_info) +
220 sizeof(struct ieee80211_msg_key_notification));
221 if (!skb)
222 return;
223
224 skb_reserve(skb, sizeof(struct ieee80211_frame_info));
225 msg = (struct ieee80211_msg_key_notification *)
226 skb_put(skb, sizeof(struct ieee80211_msg_key_notification));
227 msg->tx_rx_count = key->tx_rx_count;
228 memcpy(msg->ifname, dev->name, IFNAMSIZ);
229 if (sta)
230 memcpy(msg->addr, sta->addr, ETH_ALEN);
231 else
232 memset(msg->addr, 0xff, ETH_ALEN);
233
234 key->tx_rx_count = 0;
235
236 ieee80211_rx_mgmt(local, skb, NULL,
237 ieee80211_msg_key_threshold_notification);
238}
239
240static int ieee80211_mgmt_open(struct net_device *dev)
241{
242 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
243
244 if (!netif_running(local->mdev))
245 return -EOPNOTSUPP;
246 return 0;
247}
248
249static int ieee80211_mgmt_stop(struct net_device *dev)
250{
251 return 0;
252}
253
254static int ieee80211_change_mtu_apdev(struct net_device *dev, int new_mtu)
255{
256 /* FIX: what would be proper limits for MTU?
257 * This interface uses 802.11 frames. */
258 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN) {
259 printk(KERN_WARNING "%s: invalid MTU %d\n",
260 dev->name, new_mtu);
261 return -EINVAL;
262 }
263
264#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
265 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
266#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
267 dev->mtu = new_mtu;
268 return 0;
269}
270
271void ieee80211_if_mgmt_setup(struct net_device *dev)
272{
273 ether_setup(dev);
274 dev->hard_start_xmit = ieee80211_mgmt_start_xmit;
275 dev->change_mtu = ieee80211_change_mtu_apdev;
276 dev->get_stats = ieee80211_get_stats;
277 dev->open = ieee80211_mgmt_open;
278 dev->stop = ieee80211_mgmt_stop;
279 dev->type = ARPHRD_IEEE80211_PRISM;
280 dev->hard_header_parse = header_parse_80211;
281 dev->uninit = ieee80211_if_reinit;
282 dev->destructor = ieee80211_if_free;
283}
284
285/* regular interfaces */
286
287static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
288{
289 /* FIX: what would be proper limits for MTU?
290 * This interface uses 802.3 frames. */
291 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6) {
292 printk(KERN_WARNING "%s: invalid MTU %d\n",
293 dev->name, new_mtu);
294 return -EINVAL;
295 }
296
297#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
298 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
299#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
300 dev->mtu = new_mtu;
301 return 0;
302}
303
304static inline int identical_mac_addr_allowed(int type1, int type2)
305{
306 return (type1 == IEEE80211_IF_TYPE_MNTR ||
307 type2 == IEEE80211_IF_TYPE_MNTR ||
308 (type1 == IEEE80211_IF_TYPE_AP &&
309 type2 == IEEE80211_IF_TYPE_WDS) ||
310 (type1 == IEEE80211_IF_TYPE_WDS &&
311 (type2 == IEEE80211_IF_TYPE_WDS ||
312 type2 == IEEE80211_IF_TYPE_AP)) ||
313 (type1 == IEEE80211_IF_TYPE_AP &&
314 type2 == IEEE80211_IF_TYPE_VLAN) ||
315 (type1 == IEEE80211_IF_TYPE_VLAN &&
316 (type2 == IEEE80211_IF_TYPE_AP ||
317 type2 == IEEE80211_IF_TYPE_VLAN)));
318}
319
320/* Check if running monitor interfaces should go to a "soft monitor" mode
321 * and switch them if necessary. */
322static inline void ieee80211_start_soft_monitor(struct ieee80211_local *local)
323{
324 struct ieee80211_if_init_conf conf;
325
326 if (local->open_count && local->open_count == local->monitors &&
327 !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER) &&
328 local->ops->remove_interface) {
329 conf.if_id = -1;
330 conf.type = IEEE80211_IF_TYPE_MNTR;
331 conf.mac_addr = NULL;
332 local->ops->remove_interface(local_to_hw(local), &conf);
333 }
334}
335
336/* Check if running monitor interfaces should go to a "hard monitor" mode
337 * and switch them if necessary. */
338static void ieee80211_start_hard_monitor(struct ieee80211_local *local)
339{
340 struct ieee80211_if_init_conf conf;
341
342 if (local->open_count && local->open_count == local->monitors &&
343 !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
344 conf.if_id = -1;
345 conf.type = IEEE80211_IF_TYPE_MNTR;
346 conf.mac_addr = NULL;
347 local->ops->add_interface(local_to_hw(local), &conf);
348 }
349}
350
Daniel Drake8a69aa92007-07-27 15:43:23 +0200351static void ieee80211_if_open(struct net_device *dev)
352{
353 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
354
355 switch (sdata->type) {
356 case IEEE80211_IF_TYPE_STA:
357 case IEEE80211_IF_TYPE_IBSS:
Jiri Slabyd6f2da52007-08-28 17:01:54 -0400358 sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET;
Daniel Drake8a69aa92007-07-27 15:43:23 +0200359 break;
360 }
361}
362
Johannes Bergb2c258f2007-07-27 15:43:23 +0200363static int ieee80211_open(struct net_device *dev)
364{
365 struct ieee80211_sub_if_data *sdata, *nsdata;
366 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
367 struct ieee80211_if_init_conf conf;
368 int res;
369
370 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
371 read_lock(&local->sub_if_lock);
372 list_for_each_entry(nsdata, &local->sub_if_list, list) {
373 struct net_device *ndev = nsdata->dev;
374
375 if (ndev != dev && ndev != local->mdev && netif_running(ndev) &&
376 compare_ether_addr(dev->dev_addr, ndev->dev_addr) == 0 &&
377 !identical_mac_addr_allowed(sdata->type, nsdata->type)) {
378 read_unlock(&local->sub_if_lock);
379 return -ENOTUNIQ;
380 }
381 }
382 read_unlock(&local->sub_if_lock);
383
384 if (sdata->type == IEEE80211_IF_TYPE_WDS &&
385 is_zero_ether_addr(sdata->u.wds.remote_addr))
386 return -ENOLINK;
387
388 if (sdata->type == IEEE80211_IF_TYPE_MNTR && local->open_count &&
389 !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
390 /* run the interface in a "soft monitor" mode */
391 local->monitors++;
392 local->open_count++;
393 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
394 return 0;
395 }
Daniel Drake8a69aa92007-07-27 15:43:23 +0200396 ieee80211_if_open(dev);
Johannes Bergb2c258f2007-07-27 15:43:23 +0200397 ieee80211_start_soft_monitor(local);
398
399 conf.if_id = dev->ifindex;
400 conf.type = sdata->type;
Johannes Berg1bec3f12007-07-27 15:43:24 +0200401 if (sdata->type == IEEE80211_IF_TYPE_MNTR)
402 conf.mac_addr = NULL;
403 else
404 conf.mac_addr = dev->dev_addr;
Johannes Bergb2c258f2007-07-27 15:43:23 +0200405 res = local->ops->add_interface(local_to_hw(local), &conf);
406 if (res) {
407 if (sdata->type == IEEE80211_IF_TYPE_MNTR)
408 ieee80211_start_hard_monitor(local);
409 return res;
410 }
411
412 if (local->open_count == 0) {
413 res = 0;
414 tasklet_enable(&local->tx_pending_tasklet);
415 tasklet_enable(&local->tasklet);
416 if (local->ops->open)
417 res = local->ops->open(local_to_hw(local));
418 if (res == 0) {
419 res = dev_open(local->mdev);
420 if (res) {
421 if (local->ops->stop)
422 local->ops->stop(local_to_hw(local));
423 } else {
424 res = ieee80211_hw_config(local);
425 if (res && local->ops->stop)
426 local->ops->stop(local_to_hw(local));
427 else if (!res && local->apdev)
428 dev_open(local->apdev);
429 }
430 }
431 if (res) {
432 if (local->ops->remove_interface)
433 local->ops->remove_interface(local_to_hw(local),
434 &conf);
435 return res;
436 }
437 }
438 local->open_count++;
439
440 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
441 local->monitors++;
442 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
Daniel Draked9430a32007-07-27 15:43:24 +0200443 } else {
Johannes Bergb2c258f2007-07-27 15:43:23 +0200444 ieee80211_if_config(dev);
Daniel Draked9430a32007-07-27 15:43:24 +0200445 ieee80211_reset_erp_info(dev);
Johannes Berg11a843b2007-08-28 17:01:55 -0400446 ieee80211_enable_keys(sdata);
Daniel Draked9430a32007-07-27 15:43:24 +0200447 }
Johannes Bergb2c258f2007-07-27 15:43:23 +0200448
449 if (sdata->type == IEEE80211_IF_TYPE_STA &&
450 !local->user_space_mlme)
451 netif_carrier_off(dev);
452 else
453 netif_carrier_on(dev);
454
455 netif_start_queue(dev);
456 return 0;
457}
458
459static void ieee80211_if_shutdown(struct net_device *dev)
460{
461 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
462 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
463
464 ASSERT_RTNL();
465 switch (sdata->type) {
466 case IEEE80211_IF_TYPE_STA:
467 case IEEE80211_IF_TYPE_IBSS:
468 sdata->u.sta.state = IEEE80211_DISABLED;
469 del_timer_sync(&sdata->u.sta.timer);
Johannes Berg2a8a9a82007-08-28 17:01:52 -0400470 /*
471 * Holding the sub_if_lock for writing here blocks
472 * out the receive path and makes sure it's not
473 * currently processing a packet that may get
474 * added to the queue.
475 */
476 write_lock_bh(&local->sub_if_lock);
Johannes Bergb2c258f2007-07-27 15:43:23 +0200477 skb_queue_purge(&sdata->u.sta.skb_queue);
Johannes Berg2a8a9a82007-08-28 17:01:52 -0400478 write_unlock_bh(&local->sub_if_lock);
479
Johannes Bergb2c258f2007-07-27 15:43:23 +0200480 if (!local->ops->hw_scan &&
481 local->scan_dev == sdata->dev) {
482 local->sta_scanning = 0;
483 cancel_delayed_work(&local->scan_work);
484 }
485 flush_workqueue(local->hw.workqueue);
486 break;
487 }
488}
489
490static int ieee80211_stop(struct net_device *dev)
491{
492 struct ieee80211_sub_if_data *sdata;
493 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
494
495 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
496
497 if (sdata->type == IEEE80211_IF_TYPE_MNTR &&
498 local->open_count > 1 &&
499 !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
500 /* remove "soft monitor" interface */
501 local->open_count--;
502 local->monitors--;
503 if (!local->monitors)
504 local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
505 return 0;
506 }
507
508 netif_stop_queue(dev);
509 ieee80211_if_shutdown(dev);
510
511 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
512 local->monitors--;
513 if (!local->monitors)
514 local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
Johannes Berg11a843b2007-08-28 17:01:55 -0400515 } else {
516 /* disable all keys for as long as this netdev is down */
517 ieee80211_disable_keys(sdata);
Johannes Bergb2c258f2007-07-27 15:43:23 +0200518 }
519
520 local->open_count--;
521 if (local->open_count == 0) {
522 if (netif_running(local->mdev))
523 dev_close(local->mdev);
524 if (local->apdev)
525 dev_close(local->apdev);
526 if (local->ops->stop)
527 local->ops->stop(local_to_hw(local));
528 tasklet_disable(&local->tx_pending_tasklet);
529 tasklet_disable(&local->tasklet);
530 }
531 if (local->ops->remove_interface) {
532 struct ieee80211_if_init_conf conf;
533
534 conf.if_id = dev->ifindex;
535 conf.type = sdata->type;
536 conf.mac_addr = dev->dev_addr;
537 local->ops->remove_interface(local_to_hw(local), &conf);
538 }
539
540 ieee80211_start_hard_monitor(local);
541
542 return 0;
543}
544
545enum netif_tx_lock_class {
546 TX_LOCK_NORMAL,
547 TX_LOCK_MASTER,
548};
549
550static inline void netif_tx_lock_nested(struct net_device *dev, int subclass)
551{
552 spin_lock_nested(&dev->_xmit_lock, subclass);
553 dev->xmit_lock_owner = smp_processor_id();
554}
555
556static void ieee80211_set_multicast_list(struct net_device *dev)
557{
558 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
559 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
560 unsigned short flags;
561
562 netif_tx_lock_nested(local->mdev, TX_LOCK_MASTER);
Jiri Slaby13262ff2007-08-28 17:01:54 -0400563 if (((dev->flags & IFF_ALLMULTI) != 0) ^
564 ((sdata->flags & IEEE80211_SDATA_ALLMULTI) != 0)) {
565 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
Johannes Bergb2c258f2007-07-27 15:43:23 +0200566 local->iff_allmultis--;
Jiri Slaby13262ff2007-08-28 17:01:54 -0400567 else
Johannes Bergb2c258f2007-07-27 15:43:23 +0200568 local->iff_allmultis++;
Jiri Slaby13262ff2007-08-28 17:01:54 -0400569 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
Johannes Bergb2c258f2007-07-27 15:43:23 +0200570 }
Jiri Slaby13262ff2007-08-28 17:01:54 -0400571 if (((dev->flags & IFF_PROMISC) != 0) ^
572 ((sdata->flags & IEEE80211_SDATA_PROMISC) != 0)) {
573 if (sdata->flags & IEEE80211_SDATA_PROMISC)
Johannes Bergb2c258f2007-07-27 15:43:23 +0200574 local->iff_promiscs--;
Jiri Slaby13262ff2007-08-28 17:01:54 -0400575 else
Johannes Bergb2c258f2007-07-27 15:43:23 +0200576 local->iff_promiscs++;
Jiri Slaby13262ff2007-08-28 17:01:54 -0400577 sdata->flags ^= IEEE80211_SDATA_PROMISC;
Johannes Bergb2c258f2007-07-27 15:43:23 +0200578 }
579 if (dev->mc_count != sdata->mc_count) {
580 local->mc_count = local->mc_count - sdata->mc_count +
581 dev->mc_count;
582 sdata->mc_count = dev->mc_count;
583 }
584 if (local->ops->set_multicast_list) {
585 flags = local->mdev->flags;
586 if (local->iff_allmultis)
587 flags |= IFF_ALLMULTI;
588 if (local->iff_promiscs)
589 flags |= IFF_PROMISC;
590 read_lock(&local->sub_if_lock);
591 local->ops->set_multicast_list(local_to_hw(local), flags,
592 local->mc_count);
593 read_unlock(&local->sub_if_lock);
594 }
595 netif_tx_unlock(local->mdev);
596}
597
598/* Must not be called for mdev and apdev */
599void ieee80211_if_setup(struct net_device *dev)
600{
601 ether_setup(dev);
602 dev->hard_start_xmit = ieee80211_subif_start_xmit;
603 dev->wireless_handlers = &ieee80211_iw_handler_def;
604 dev->set_multicast_list = ieee80211_set_multicast_list;
605 dev->change_mtu = ieee80211_change_mtu;
606 dev->get_stats = ieee80211_get_stats;
607 dev->open = ieee80211_open;
608 dev->stop = ieee80211_stop;
609 dev->uninit = ieee80211_if_reinit;
610 dev->destructor = ieee80211_if_free;
611}
612
613/* WDS specialties */
614
615int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr)
616{
617 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
618 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
619 struct sta_info *sta;
620
621 if (compare_ether_addr(remote_addr, sdata->u.wds.remote_addr) == 0)
622 return 0;
623
624 /* Create STA entry for the new peer */
625 sta = sta_info_add(local, dev, remote_addr, GFP_KERNEL);
626 if (!sta)
627 return -ENOMEM;
628 sta_info_put(sta);
629
630 /* Remove STA entry for the old peer */
631 sta = sta_info_get(local, sdata->u.wds.remote_addr);
632 if (sta) {
Michael Wube8755e2007-07-27 15:43:23 +0200633 sta_info_free(sta);
Johannes Bergb2c258f2007-07-27 15:43:23 +0200634 sta_info_put(sta);
Johannes Bergb2c258f2007-07-27 15:43:23 +0200635 } else {
636 printk(KERN_DEBUG "%s: could not find STA entry for WDS link "
637 "peer " MAC_FMT "\n",
638 dev->name, MAC_ARG(sdata->u.wds.remote_addr));
639 }
640
641 /* Update WDS link data */
642 memcpy(&sdata->u.wds.remote_addr, remote_addr, ETH_ALEN);
643
644 return 0;
645}
646
647/* everything else */
648
Johannes Bergb2c258f2007-07-27 15:43:23 +0200649static int __ieee80211_if_config(struct net_device *dev,
650 struct sk_buff *beacon,
651 struct ieee80211_tx_control *control)
652{
653 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
654 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
655 struct ieee80211_if_conf conf;
656 static u8 scan_bssid[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
657
658 if (!local->ops->config_interface || !netif_running(dev))
659 return 0;
660
661 memset(&conf, 0, sizeof(conf));
662 conf.type = sdata->type;
663 if (sdata->type == IEEE80211_IF_TYPE_STA ||
664 sdata->type == IEEE80211_IF_TYPE_IBSS) {
665 if (local->sta_scanning &&
666 local->scan_dev == dev)
667 conf.bssid = scan_bssid;
668 else
669 conf.bssid = sdata->u.sta.bssid;
670 conf.ssid = sdata->u.sta.ssid;
671 conf.ssid_len = sdata->u.sta.ssid_len;
672 conf.generic_elem = sdata->u.sta.extra_ie;
673 conf.generic_elem_len = sdata->u.sta.extra_ie_len;
674 } else if (sdata->type == IEEE80211_IF_TYPE_AP) {
675 conf.ssid = sdata->u.ap.ssid;
676 conf.ssid_len = sdata->u.ap.ssid_len;
677 conf.generic_elem = sdata->u.ap.generic_elem;
678 conf.generic_elem_len = sdata->u.ap.generic_elem_len;
679 conf.beacon = beacon;
680 conf.beacon_control = control;
681 }
682 return local->ops->config_interface(local_to_hw(local),
683 dev->ifindex, &conf);
684}
685
686int ieee80211_if_config(struct net_device *dev)
687{
688 return __ieee80211_if_config(dev, NULL, NULL);
689}
690
691int ieee80211_if_config_beacon(struct net_device *dev)
692{
693 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
694 struct ieee80211_tx_control control;
695 struct sk_buff *skb;
696
697 if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
698 return 0;
699 skb = ieee80211_beacon_get(local_to_hw(local), dev->ifindex, &control);
700 if (!skb)
701 return -ENOMEM;
702 return __ieee80211_if_config(dev, skb, &control);
703}
704
705int ieee80211_hw_config(struct ieee80211_local *local)
706{
707 struct ieee80211_hw_mode *mode;
708 struct ieee80211_channel *chan;
709 int ret = 0;
710
711 if (local->sta_scanning) {
712 chan = local->scan_channel;
713 mode = local->scan_hw_mode;
714 } else {
715 chan = local->oper_channel;
716 mode = local->oper_hw_mode;
717 }
718
719 local->hw.conf.channel = chan->chan;
720 local->hw.conf.channel_val = chan->val;
721 local->hw.conf.power_level = chan->power_level;
722 local->hw.conf.freq = chan->freq;
723 local->hw.conf.phymode = mode->mode;
724 local->hw.conf.antenna_max = chan->antenna_max;
725 local->hw.conf.chan = chan;
726 local->hw.conf.mode = mode;
727
728#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
729 printk(KERN_DEBUG "HW CONFIG: channel=%d freq=%d "
730 "phymode=%d\n", local->hw.conf.channel, local->hw.conf.freq,
731 local->hw.conf.phymode);
732#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
733
734 if (local->ops->config)
735 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
736
737 return ret;
738}
739
Daniel Draked9430a32007-07-27 15:43:24 +0200740void ieee80211_erp_info_change_notify(struct net_device *dev, u8 changes)
741{
742 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
743 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
744 if (local->ops->erp_ie_changed)
745 local->ops->erp_ie_changed(local_to_hw(local), changes,
Jiri Slaby13262ff2007-08-28 17:01:54 -0400746 !!(sdata->flags & IEEE80211_SDATA_USE_PROTECTION),
747 !(sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE));
Daniel Draked9430a32007-07-27 15:43:24 +0200748}
749
750void ieee80211_reset_erp_info(struct net_device *dev)
751{
752 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
753
Jiri Slaby13262ff2007-08-28 17:01:54 -0400754 sdata->flags &= ~(IEEE80211_SDATA_USE_PROTECTION |
755 IEEE80211_SDATA_SHORT_PREAMBLE);
Daniel Draked9430a32007-07-27 15:43:24 +0200756 ieee80211_erp_info_change_notify(dev,
757 IEEE80211_ERP_CHANGE_PROTECTION |
758 IEEE80211_ERP_CHANGE_PREAMBLE);
759}
760
Johannes Bergb2c258f2007-07-27 15:43:23 +0200761struct dev_mc_list *ieee80211_get_mc_list_item(struct ieee80211_hw *hw,
762 struct dev_mc_list *prev,
763 void **ptr)
764{
765 struct ieee80211_local *local = hw_to_local(hw);
766 struct ieee80211_sub_if_data *sdata = *ptr;
767 struct dev_mc_list *mc;
768
769 if (!prev) {
770 WARN_ON(sdata);
771 sdata = NULL;
772 }
773 if (!prev || !prev->next) {
774 if (sdata)
775 sdata = list_entry(sdata->list.next,
776 struct ieee80211_sub_if_data, list);
777 else
778 sdata = list_entry(local->sub_if_list.next,
779 struct ieee80211_sub_if_data, list);
780 if (&sdata->list != &local->sub_if_list)
781 mc = sdata->dev->mc_list;
782 else
783 mc = NULL;
784 } else
785 mc = prev->next;
786
787 *ptr = sdata;
788 return mc;
789}
790EXPORT_SYMBOL(ieee80211_get_mc_list_item);
791
Jiri Bencf0706e82007-05-05 11:45:53 -0700792void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
793 struct sk_buff *skb,
794 struct ieee80211_tx_status *status)
795{
796 struct ieee80211_local *local = hw_to_local(hw);
797 struct ieee80211_tx_status *saved;
798 int tmp;
799
800 skb->dev = local->mdev;
801 saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC);
802 if (unlikely(!saved)) {
803 if (net_ratelimit())
804 printk(KERN_WARNING "%s: Not enough memory, "
805 "dropping tx status", skb->dev->name);
806 /* should be dev_kfree_skb_irq, but due to this function being
807 * named _irqsafe instead of just _irq we can't be sure that
808 * people won't call it from non-irq contexts */
809 dev_kfree_skb_any(skb);
810 return;
811 }
812 memcpy(saved, status, sizeof(struct ieee80211_tx_status));
813 /* copy pointer to saved status into skb->cb for use by tasklet */
814 memcpy(skb->cb, &saved, sizeof(saved));
815
816 skb->pkt_type = IEEE80211_TX_STATUS_MSG;
817 skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ?
818 &local->skb_queue : &local->skb_queue_unreliable, skb);
819 tmp = skb_queue_len(&local->skb_queue) +
820 skb_queue_len(&local->skb_queue_unreliable);
821 while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
822 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
823 memcpy(&saved, skb->cb, sizeof(saved));
824 kfree(saved);
825 dev_kfree_skb_irq(skb);
826 tmp--;
827 I802_DEBUG_INC(local->tx_status_drop);
828 }
829 tasklet_schedule(&local->tasklet);
830}
831EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
832
833static void ieee80211_tasklet_handler(unsigned long data)
834{
835 struct ieee80211_local *local = (struct ieee80211_local *) data;
836 struct sk_buff *skb;
837 struct ieee80211_rx_status rx_status;
838 struct ieee80211_tx_status *tx_status;
839
840 while ((skb = skb_dequeue(&local->skb_queue)) ||
841 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
842 switch (skb->pkt_type) {
843 case IEEE80211_RX_MSG:
844 /* status is in skb->cb */
845 memcpy(&rx_status, skb->cb, sizeof(rx_status));
846 /* Clear skb->type in order to not confuse kernel
847 * netstack. */
848 skb->pkt_type = 0;
849 __ieee80211_rx(local_to_hw(local), skb, &rx_status);
850 break;
851 case IEEE80211_TX_STATUS_MSG:
852 /* get pointer to saved status out of skb->cb */
853 memcpy(&tx_status, skb->cb, sizeof(tx_status));
854 skb->pkt_type = 0;
855 ieee80211_tx_status(local_to_hw(local),
856 skb, tx_status);
857 kfree(tx_status);
858 break;
859 default: /* should never get here! */
860 printk(KERN_ERR "%s: Unknown message type (%d)\n",
861 local->mdev->name, skb->pkt_type);
862 dev_kfree_skb(skb);
863 break;
864 }
865 }
866}
867
Jiri Bencf0706e82007-05-05 11:45:53 -0700868/* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
869 * make a prepared TX frame (one that has been given to hw) to look like brand
870 * new IEEE 802.11 frame that is ready to go through TX processing again.
871 * Also, tx_packet_data in cb is restored from tx_control. */
872static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
873 struct ieee80211_key *key,
874 struct sk_buff *skb,
875 struct ieee80211_tx_control *control)
876{
877 int hdrlen, iv_len, mic_len;
878 struct ieee80211_tx_packet_data *pkt_data;
879
880 pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
881 pkt_data->ifindex = control->ifindex;
Jiri Slabye8bf9642007-08-28 17:01:54 -0400882 pkt_data->flags = 0;
883 if (control->flags & IEEE80211_TXCTL_REQ_TX_STATUS)
884 pkt_data->flags |= IEEE80211_TXPD_REQ_TX_STATUS;
885 if (control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT)
886 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
887 if (control->flags & IEEE80211_TXCTL_REQUEUE)
888 pkt_data->flags |= IEEE80211_TXPD_REQUEUE;
889 if (control->type == IEEE80211_IF_TYPE_MGMT)
890 pkt_data->flags |= IEEE80211_TXPD_MGMT_IFACE;
Jiri Bencf0706e82007-05-05 11:45:53 -0700891 pkt_data->queue = control->queue;
892
893 hdrlen = ieee80211_get_hdrlen_from_skb(skb);
894
895 if (!key)
896 goto no_key;
897
Johannes Berg8f20fc22007-08-28 17:01:54 -0400898 switch (key->conf.alg) {
Jiri Bencf0706e82007-05-05 11:45:53 -0700899 case ALG_WEP:
900 iv_len = WEP_IV_LEN;
901 mic_len = WEP_ICV_LEN;
902 break;
903 case ALG_TKIP:
904 iv_len = TKIP_IV_LEN;
905 mic_len = TKIP_ICV_LEN;
906 break;
907 case ALG_CCMP:
908 iv_len = CCMP_HDR_LEN;
909 mic_len = CCMP_MIC_LEN;
910 break;
911 default:
912 goto no_key;
913 }
914
Johannes Berg8f20fc22007-08-28 17:01:54 -0400915 if (skb->len >= mic_len &&
Johannes Berg11a843b2007-08-28 17:01:55 -0400916 !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
Jiri Bencf0706e82007-05-05 11:45:53 -0700917 skb_trim(skb, skb->len - mic_len);
918 if (skb->len >= iv_len && skb->len > hdrlen) {
919 memmove(skb->data + iv_len, skb->data, hdrlen);
920 skb_pull(skb, iv_len);
921 }
922
923no_key:
924 {
925 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
926 u16 fc = le16_to_cpu(hdr->frame_control);
927 if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
928 fc &= ~IEEE80211_STYPE_QOS_DATA;
929 hdr->frame_control = cpu_to_le16(fc);
930 memmove(skb->data + 2, skb->data, hdrlen - 2);
931 skb_pull(skb, 2);
932 }
933 }
934}
935
Jiri Bencf0706e82007-05-05 11:45:53 -0700936void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
937 struct ieee80211_tx_status *status)
938{
939 struct sk_buff *skb2;
940 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
941 struct ieee80211_local *local = hw_to_local(hw);
942 u16 frag, type;
943 u32 msg_type;
Johannes Bergb306f452007-07-10 19:32:08 +0200944 struct ieee80211_tx_status_rtap_hdr *rthdr;
945 struct ieee80211_sub_if_data *sdata;
946 int monitors;
Jiri Bencf0706e82007-05-05 11:45:53 -0700947
948 if (!status) {
949 printk(KERN_ERR
950 "%s: ieee80211_tx_status called with NULL status\n",
951 local->mdev->name);
952 dev_kfree_skb(skb);
953 return;
954 }
955
956 if (status->excessive_retries) {
957 struct sta_info *sta;
958 sta = sta_info_get(local, hdr->addr1);
959 if (sta) {
960 if (sta->flags & WLAN_STA_PS) {
961 /* The STA is in power save mode, so assume
962 * that this TX packet failed because of that.
963 */
964 status->excessive_retries = 0;
965 status->flags |= IEEE80211_TX_STATUS_TX_FILTERED;
966 }
967 sta_info_put(sta);
968 }
969 }
970
971 if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) {
972 struct sta_info *sta;
973 sta = sta_info_get(local, hdr->addr1);
974 if (sta) {
975 sta->tx_filtered_count++;
976
977 /* Clear the TX filter mask for this STA when sending
978 * the next packet. If the STA went to power save mode,
979 * this will happen when it is waking up for the next
980 * time. */
981 sta->clear_dst_mask = 1;
982
983 /* TODO: Is the WLAN_STA_PS flag always set here or is
984 * the race between RX and TX status causing some
985 * packets to be filtered out before 80211.o gets an
986 * update for PS status? This seems to be the case, so
987 * no changes are likely to be needed. */
988 if (sta->flags & WLAN_STA_PS &&
989 skb_queue_len(&sta->tx_filtered) <
990 STA_MAX_TX_BUFFER) {
991 ieee80211_remove_tx_extra(local, sta->key,
992 skb,
993 &status->control);
994 skb_queue_tail(&sta->tx_filtered, skb);
995 } else if (!(sta->flags & WLAN_STA_PS) &&
996 !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) {
997 /* Software retry the packet once */
998 status->control.flags |= IEEE80211_TXCTL_REQUEUE;
999 ieee80211_remove_tx_extra(local, sta->key,
1000 skb,
1001 &status->control);
1002 dev_queue_xmit(skb);
1003 } else {
1004 if (net_ratelimit()) {
1005 printk(KERN_DEBUG "%s: dropped TX "
1006 "filtered frame queue_len=%d "
1007 "PS=%d @%lu\n",
1008 local->mdev->name,
1009 skb_queue_len(
1010 &sta->tx_filtered),
1011 !!(sta->flags & WLAN_STA_PS),
1012 jiffies);
1013 }
1014 dev_kfree_skb(skb);
1015 }
1016 sta_info_put(sta);
1017 return;
1018 }
1019 } else {
1020 /* FIXME: STUPID to call this with both local and local->mdev */
1021 rate_control_tx_status(local, local->mdev, skb, status);
1022 }
1023
1024 ieee80211_led_tx(local, 0);
1025
1026 /* SNMP counters
1027 * Fragments are passed to low-level drivers as separate skbs, so these
1028 * are actually fragments, not frames. Update frame counters only for
1029 * the first fragment of the frame. */
1030
1031 frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
1032 type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
1033
1034 if (status->flags & IEEE80211_TX_STATUS_ACK) {
1035 if (frag == 0) {
1036 local->dot11TransmittedFrameCount++;
1037 if (is_multicast_ether_addr(hdr->addr1))
1038 local->dot11MulticastTransmittedFrameCount++;
1039 if (status->retry_count > 0)
1040 local->dot11RetryCount++;
1041 if (status->retry_count > 1)
1042 local->dot11MultipleRetryCount++;
1043 }
1044
1045 /* This counter shall be incremented for an acknowledged MPDU
1046 * with an individual address in the address 1 field or an MPDU
1047 * with a multicast address in the address 1 field of type Data
1048 * or Management. */
1049 if (!is_multicast_ether_addr(hdr->addr1) ||
1050 type == IEEE80211_FTYPE_DATA ||
1051 type == IEEE80211_FTYPE_MGMT)
1052 local->dot11TransmittedFragmentCount++;
1053 } else {
1054 if (frag == 0)
1055 local->dot11FailedCount++;
1056 }
1057
Jiri Bencf0706e82007-05-05 11:45:53 -07001058 msg_type = (status->flags & IEEE80211_TX_STATUS_ACK) ?
1059 ieee80211_msg_tx_callback_ack : ieee80211_msg_tx_callback_fail;
1060
Johannes Bergb306f452007-07-10 19:32:08 +02001061 /* this was a transmitted frame, but now we want to reuse it */
1062 skb_orphan(skb);
1063
1064 if ((status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS) &&
1065 local->apdev) {
1066 if (local->monitors) {
1067 skb2 = skb_clone(skb, GFP_ATOMIC);
1068 } else {
1069 skb2 = skb;
1070 skb = NULL;
1071 }
1072
1073 if (skb2)
1074 /* Send frame to hostapd */
1075 ieee80211_rx_mgmt(local, skb2, NULL, msg_type);
1076
1077 if (!skb)
1078 return;
1079 }
1080
1081 if (!local->monitors) {
Jiri Bencf0706e82007-05-05 11:45:53 -07001082 dev_kfree_skb(skb);
1083 return;
1084 }
Jiri Bencf0706e82007-05-05 11:45:53 -07001085
Johannes Bergb306f452007-07-10 19:32:08 +02001086 /* send frame to monitor interfaces now */
1087
1088 if (skb_headroom(skb) < sizeof(*rthdr)) {
1089 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
1090 dev_kfree_skb(skb);
1091 return;
1092 }
1093
1094 rthdr = (struct ieee80211_tx_status_rtap_hdr*)
1095 skb_push(skb, sizeof(*rthdr));
1096
1097 memset(rthdr, 0, sizeof(*rthdr));
1098 rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
1099 rthdr->hdr.it_present =
1100 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
1101 (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
1102
1103 if (!(status->flags & IEEE80211_TX_STATUS_ACK) &&
1104 !is_multicast_ether_addr(hdr->addr1))
1105 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
1106
1107 if ((status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) &&
1108 (status->control.flags & IEEE80211_TXCTL_USE_CTS_PROTECT))
1109 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
1110 else if (status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS)
1111 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
1112
1113 rthdr->data_retries = status->retry_count;
1114
1115 read_lock(&local->sub_if_lock);
1116 monitors = local->monitors;
1117 list_for_each_entry(sdata, &local->sub_if_list, list) {
1118 /*
1119 * Using the monitors counter is possibly racy, but
1120 * if the value is wrong we simply either clone the skb
1121 * once too much or forget sending it to one monitor iface
1122 * The latter case isn't nice but fixing the race is much
1123 * more complicated.
1124 */
1125 if (!monitors || !skb)
1126 goto out;
1127
1128 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
1129 if (!netif_running(sdata->dev))
1130 continue;
1131 monitors--;
1132 if (monitors)
1133 skb2 = skb_clone(skb, GFP_KERNEL);
1134 else
1135 skb2 = NULL;
1136 skb->dev = sdata->dev;
1137 /* XXX: is this sufficient for BPF? */
1138 skb_set_mac_header(skb, 0);
1139 skb->ip_summed = CHECKSUM_UNNECESSARY;
1140 skb->pkt_type = PACKET_OTHERHOST;
1141 skb->protocol = htons(ETH_P_802_2);
1142 memset(skb->cb, 0, sizeof(skb->cb));
1143 netif_rx(skb);
1144 skb = skb2;
Johannes Bergb306f452007-07-10 19:32:08 +02001145 }
1146 }
1147 out:
1148 read_unlock(&local->sub_if_lock);
1149 if (skb)
1150 dev_kfree_skb(skb);
Jiri Bencf0706e82007-05-05 11:45:53 -07001151}
1152EXPORT_SYMBOL(ieee80211_tx_status);
1153
Jiri Bencf0706e82007-05-05 11:45:53 -07001154struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
1155 const struct ieee80211_ops *ops)
1156{
1157 struct net_device *mdev;
1158 struct ieee80211_local *local;
1159 struct ieee80211_sub_if_data *sdata;
1160 int priv_size;
1161 struct wiphy *wiphy;
1162
1163 /* Ensure 32-byte alignment of our private data and hw private data.
1164 * We use the wiphy priv data for both our ieee80211_local and for
1165 * the driver's private data
1166 *
1167 * In memory it'll be like this:
1168 *
1169 * +-------------------------+
1170 * | struct wiphy |
1171 * +-------------------------+
1172 * | struct ieee80211_local |
1173 * +-------------------------+
1174 * | driver's private data |
1175 * +-------------------------+
1176 *
1177 */
1178 priv_size = ((sizeof(struct ieee80211_local) +
1179 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
1180 priv_data_len;
1181
1182 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
1183
1184 if (!wiphy)
1185 return NULL;
1186
1187 wiphy->privid = mac80211_wiphy_privid;
1188
1189 local = wiphy_priv(wiphy);
1190 local->hw.wiphy = wiphy;
1191
1192 local->hw.priv = (char *)local +
1193 ((sizeof(struct ieee80211_local) +
1194 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
1195
Johannes Berg4480f15c2007-07-10 19:32:10 +02001196 BUG_ON(!ops->tx);
1197 BUG_ON(!ops->config);
1198 BUG_ON(!ops->add_interface);
Jiri Bencf0706e82007-05-05 11:45:53 -07001199 local->ops = ops;
1200
1201 /* for now, mdev needs sub_if_data :/ */
1202 mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
1203 "wmaster%d", ether_setup);
1204 if (!mdev) {
1205 wiphy_free(wiphy);
1206 return NULL;
1207 }
1208
1209 sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
1210 mdev->ieee80211_ptr = &sdata->wdev;
1211 sdata->wdev.wiphy = wiphy;
1212
1213 local->hw.queues = 1; /* default */
1214
1215 local->mdev = mdev;
1216 local->rx_pre_handlers = ieee80211_rx_pre_handlers;
1217 local->rx_handlers = ieee80211_rx_handlers;
1218 local->tx_handlers = ieee80211_tx_handlers;
1219
1220 local->bridge_packets = 1;
1221
1222 local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1223 local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1224 local->short_retry_limit = 7;
1225 local->long_retry_limit = 4;
1226 local->hw.conf.radio_enabled = 1;
Jiri Bencf0706e82007-05-05 11:45:53 -07001227
1228 local->enabled_modes = (unsigned int) -1;
1229
1230 INIT_LIST_HEAD(&local->modes_list);
1231
1232 rwlock_init(&local->sub_if_lock);
1233 INIT_LIST_HEAD(&local->sub_if_list);
1234
1235 INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
Jiri Bencf0706e82007-05-05 11:45:53 -07001236 ieee80211_rx_bss_list_init(mdev);
1237
1238 sta_info_init(local);
1239
1240 mdev->hard_start_xmit = ieee80211_master_start_xmit;
1241 mdev->open = ieee80211_master_open;
1242 mdev->stop = ieee80211_master_stop;
1243 mdev->type = ARPHRD_IEEE80211;
1244 mdev->hard_header_parse = header_parse_80211;
1245
1246 sdata->type = IEEE80211_IF_TYPE_AP;
1247 sdata->dev = mdev;
1248 sdata->local = local;
1249 sdata->u.ap.force_unicast_rateidx = -1;
1250 sdata->u.ap.max_ratectrl_rateidx = -1;
1251 ieee80211_if_sdata_init(sdata);
1252 list_add_tail(&sdata->list, &local->sub_if_list);
1253
1254 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1255 (unsigned long)local);
1256 tasklet_disable(&local->tx_pending_tasklet);
1257
1258 tasklet_init(&local->tasklet,
1259 ieee80211_tasklet_handler,
1260 (unsigned long) local);
1261 tasklet_disable(&local->tasklet);
1262
1263 skb_queue_head_init(&local->skb_queue);
1264 skb_queue_head_init(&local->skb_queue_unreliable);
1265
1266 return local_to_hw(local);
1267}
1268EXPORT_SYMBOL(ieee80211_alloc_hw);
1269
1270int ieee80211_register_hw(struct ieee80211_hw *hw)
1271{
1272 struct ieee80211_local *local = hw_to_local(hw);
1273 const char *name;
1274 int result;
1275
1276 result = wiphy_register(local->hw.wiphy);
1277 if (result < 0)
1278 return result;
1279
1280 name = wiphy_dev(local->hw.wiphy)->driver->name;
1281 local->hw.workqueue = create_singlethread_workqueue(name);
1282 if (!local->hw.workqueue) {
1283 result = -ENOMEM;
1284 goto fail_workqueue;
1285 }
1286
Johannes Bergb306f452007-07-10 19:32:08 +02001287 /*
1288 * The hardware needs headroom for sending the frame,
1289 * and we need some headroom for passing the frame to monitor
1290 * interfaces, but never both at the same time.
1291 */
Jiri Benc33ccad32007-07-18 17:10:44 +02001292 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1293 sizeof(struct ieee80211_tx_status_rtap_hdr));
Johannes Bergb306f452007-07-10 19:32:08 +02001294
Jiri Bence9f207f2007-05-05 11:46:38 -07001295 debugfs_hw_add(local);
1296
Jiri Bencf0706e82007-05-05 11:45:53 -07001297 local->hw.conf.beacon_int = 1000;
1298
1299 local->wstats_flags |= local->hw.max_rssi ?
1300 IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID;
1301 local->wstats_flags |= local->hw.max_signal ?
1302 IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1303 local->wstats_flags |= local->hw.max_noise ?
1304 IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1305 if (local->hw.max_rssi < 0 || local->hw.max_noise < 0)
1306 local->wstats_flags |= IW_QUAL_DBM;
1307
1308 result = sta_info_start(local);
1309 if (result < 0)
1310 goto fail_sta_info;
1311
1312 rtnl_lock();
1313 result = dev_alloc_name(local->mdev, local->mdev->name);
1314 if (result < 0)
1315 goto fail_dev;
1316
1317 memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1318 SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1319
1320 result = register_netdevice(local->mdev);
1321 if (result < 0)
1322 goto fail_dev;
1323
Jiri Bence9f207f2007-05-05 11:46:38 -07001324 ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1325
Jiri Bencf0706e82007-05-05 11:45:53 -07001326 result = ieee80211_init_rate_ctrl_alg(local, NULL);
1327 if (result < 0) {
1328 printk(KERN_DEBUG "%s: Failed to initialize rate control "
1329 "algorithm\n", local->mdev->name);
1330 goto fail_rate;
1331 }
1332
1333 result = ieee80211_wep_init(local);
1334
1335 if (result < 0) {
1336 printk(KERN_DEBUG "%s: Failed to initialize wep\n",
1337 local->mdev->name);
1338 goto fail_wep;
1339 }
1340
1341 ieee80211_install_qdisc(local->mdev);
1342
1343 /* add one default STA interface */
1344 result = ieee80211_if_add(local->mdev, "wlan%d", NULL,
1345 IEEE80211_IF_TYPE_STA);
1346 if (result)
1347 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
1348 local->mdev->name);
1349
1350 local->reg_state = IEEE80211_DEV_REGISTERED;
1351 rtnl_unlock();
1352
1353 ieee80211_led_init(local);
1354
1355 return 0;
1356
1357fail_wep:
1358 rate_control_deinitialize(local);
1359fail_rate:
Jiri Bence9f207f2007-05-05 11:46:38 -07001360 ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
Jiri Bencf0706e82007-05-05 11:45:53 -07001361 unregister_netdevice(local->mdev);
1362fail_dev:
1363 rtnl_unlock();
1364 sta_info_stop(local);
1365fail_sta_info:
Jiri Bence9f207f2007-05-05 11:46:38 -07001366 debugfs_hw_del(local);
Jiri Bencf0706e82007-05-05 11:45:53 -07001367 destroy_workqueue(local->hw.workqueue);
1368fail_workqueue:
1369 wiphy_unregister(local->hw.wiphy);
1370 return result;
1371}
1372EXPORT_SYMBOL(ieee80211_register_hw);
1373
1374int ieee80211_register_hwmode(struct ieee80211_hw *hw,
1375 struct ieee80211_hw_mode *mode)
1376{
1377 struct ieee80211_local *local = hw_to_local(hw);
1378 struct ieee80211_rate *rate;
1379 int i;
1380
1381 INIT_LIST_HEAD(&mode->list);
1382 list_add_tail(&mode->list, &local->modes_list);
1383
1384 local->hw_modes |= (1 << mode->mode);
1385 for (i = 0; i < mode->num_rates; i++) {
1386 rate = &(mode->rates[i]);
1387 rate->rate_inv = CHAN_UTIL_RATE_LCM / rate->rate;
1388 }
1389 ieee80211_prepare_rates(local, mode);
1390
1391 if (!local->oper_hw_mode) {
1392 /* Default to this mode */
1393 local->hw.conf.phymode = mode->mode;
1394 local->oper_hw_mode = local->scan_hw_mode = mode;
1395 local->oper_channel = local->scan_channel = &mode->channels[0];
1396 local->hw.conf.mode = local->oper_hw_mode;
1397 local->hw.conf.chan = local->oper_channel;
1398 }
1399
1400 if (!(hw->flags & IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED))
Daniel Drakefd8bacc2007-06-09 19:07:14 +01001401 ieee80211_set_default_regdomain(mode);
Jiri Bencf0706e82007-05-05 11:45:53 -07001402
1403 return 0;
1404}
1405EXPORT_SYMBOL(ieee80211_register_hwmode);
1406
1407void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1408{
1409 struct ieee80211_local *local = hw_to_local(hw);
1410 struct ieee80211_sub_if_data *sdata, *tmp;
1411 struct list_head tmp_list;
1412 int i;
1413
1414 tasklet_kill(&local->tx_pending_tasklet);
1415 tasklet_kill(&local->tasklet);
1416
1417 rtnl_lock();
1418
1419 BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED);
1420
1421 local->reg_state = IEEE80211_DEV_UNREGISTERED;
1422 if (local->apdev)
1423 ieee80211_if_del_mgmt(local);
1424
1425 write_lock_bh(&local->sub_if_lock);
1426 list_replace_init(&local->sub_if_list, &tmp_list);
1427 write_unlock_bh(&local->sub_if_lock);
1428
1429 list_for_each_entry_safe(sdata, tmp, &tmp_list, list)
1430 __ieee80211_if_del(local, sdata);
1431
1432 rtnl_unlock();
1433
Jiri Bencf0706e82007-05-05 11:45:53 -07001434 ieee80211_rx_bss_list_deinit(local->mdev);
1435 ieee80211_clear_tx_pending(local);
1436 sta_info_stop(local);
1437 rate_control_deinitialize(local);
Jiri Bence9f207f2007-05-05 11:46:38 -07001438 debugfs_hw_del(local);
Jiri Bencf0706e82007-05-05 11:45:53 -07001439
1440 for (i = 0; i < NUM_IEEE80211_MODES; i++) {
1441 kfree(local->supp_rates[i]);
1442 kfree(local->basic_rates[i]);
1443 }
1444
1445 if (skb_queue_len(&local->skb_queue)
1446 || skb_queue_len(&local->skb_queue_unreliable))
1447 printk(KERN_WARNING "%s: skb_queue not empty\n",
1448 local->mdev->name);
1449 skb_queue_purge(&local->skb_queue);
1450 skb_queue_purge(&local->skb_queue_unreliable);
1451
1452 destroy_workqueue(local->hw.workqueue);
1453 wiphy_unregister(local->hw.wiphy);
1454 ieee80211_wep_free(local);
1455 ieee80211_led_exit(local);
1456}
1457EXPORT_SYMBOL(ieee80211_unregister_hw);
1458
1459void ieee80211_free_hw(struct ieee80211_hw *hw)
1460{
1461 struct ieee80211_local *local = hw_to_local(hw);
1462
1463 ieee80211_if_free(local->mdev);
1464 wiphy_free(local->hw.wiphy);
1465}
1466EXPORT_SYMBOL(ieee80211_free_hw);
1467
Jiri Bencf0706e82007-05-05 11:45:53 -07001468struct net_device_stats *ieee80211_dev_stats(struct net_device *dev)
1469{
1470 struct ieee80211_sub_if_data *sdata;
1471 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1472 return &sdata->stats;
1473}
1474
1475static int __init ieee80211_init(void)
1476{
1477 struct sk_buff *skb;
1478 int ret;
1479
1480 BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb));
1481
1482 ret = ieee80211_wme_register();
1483 if (ret) {
1484 printk(KERN_DEBUG "ieee80211_init: failed to "
1485 "initialize WME (err=%d)\n", ret);
1486 return ret;
1487 }
1488
Jiri Bence9f207f2007-05-05 11:46:38 -07001489 ieee80211_debugfs_netdev_init();
Daniel Drakefd8bacc2007-06-09 19:07:14 +01001490 ieee80211_regdomain_init();
Jiri Bence9f207f2007-05-05 11:46:38 -07001491
Jiri Bencf0706e82007-05-05 11:45:53 -07001492 return 0;
1493}
1494
Jiri Bencf0706e82007-05-05 11:45:53 -07001495static void __exit ieee80211_exit(void)
1496{
1497 ieee80211_wme_unregister();
Jiri Bence9f207f2007-05-05 11:46:38 -07001498 ieee80211_debugfs_netdev_exit();
Jiri Bencf0706e82007-05-05 11:45:53 -07001499}
1500
1501
Johannes Bergca9938f2007-09-11 12:50:32 +02001502subsys_initcall(ieee80211_init);
Jiri Bencf0706e82007-05-05 11:45:53 -07001503module_exit(ieee80211_exit);
1504
1505MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1506MODULE_LICENSE("GPL");