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[MAC80211]: improve locking of sta_info related structures
[deliverable/linux.git] / net / mac80211 / ieee80211.c
CommitLineData
f0706e82
JB		 1/*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11#include <net/mac80211.h>
12#include <net/ieee80211_radiotap.h>
13#include <linux/module.h>
14#include <linux/init.h>
15#include <linux/netdevice.h>
16#include <linux/types.h>
17#include <linux/slab.h>
18#include <linux/skbuff.h>
19#include <linux/etherdevice.h>
20#include <linux/if_arp.h>
21#include <linux/wireless.h>
22#include <linux/rtnetlink.h>
f0706e82
JB		 23#include <linux/bitmap.h>
24#include <net/cfg80211.h>
25
26#include "ieee80211_common.h"
27#include "ieee80211_i.h"
28#include "ieee80211_rate.h"
29#include "wep.h"
f0706e82
JB		 30#include "wme.h"
31#include "aes_ccm.h"
32#include "ieee80211_led.h"
33#include "ieee80211_cfg.h"
e9f207f0
JB		 34#include "debugfs.h"
35#include "debugfs_netdev.h"
f0706e82 36
b306f453
JB		 37/*
38 * For seeing transmitted packets on monitor interfaces
39 * we have a radiotap header too.
40 */
41struct ieee80211_tx_status_rtap_hdr {
42 struct ieee80211_radiotap_header hdr;
43 __le16 tx_flags;
44 u8 data_retries;
45} __attribute__ ((packed));
46
b2c258fb 47/* common interface routines */
b306f453 48
b2c258fb 49static struct net_device_stats *ieee80211_get_stats(struct net_device *dev)
f0706e82 50{
b2c258fb
JB		 51 struct ieee80211_sub_if_data *sdata;
52 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
53 return &(sdata->stats);
54}
f0706e82 55
b2c258fb
JB		 56static int header_parse_80211(struct sk_buff *skb, unsigned char *haddr)
57{
58 memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
59 return ETH_ALEN;
60}
f0706e82 61
b2c258fb 62/* master interface */
f0706e82 63
b2c258fb
JB		 64static int ieee80211_master_open(struct net_device *dev)
65{
66 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
67 struct ieee80211_sub_if_data *sdata;
68 int res = -EOPNOTSUPP;
f0706e82 69
b2c258fb
JB		 70 read_lock(&local->sub_if_lock);
71 list_for_each_entry(sdata, &local->sub_if_list, list) {
72 if (sdata->dev != dev && netif_running(sdata->dev)) {
73 res = 0;
74 break;
75 }
76 }
77 read_unlock(&local->sub_if_lock);
78 return res;
79}
f0706e82 80
b2c258fb 81static int ieee80211_master_stop(struct net_device *dev)
f0706e82 82{
b2c258fb
JB		 83 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
84 struct ieee80211_sub_if_data *sdata;
f0706e82 85
b2c258fb
JB		 86 read_lock(&local->sub_if_lock);
87 list_for_each_entry(sdata, &local->sub_if_list, list)
88 if (sdata->dev != dev && netif_running(sdata->dev))
89 dev_close(sdata->dev);
90 read_unlock(&local->sub_if_lock);
f0706e82 91
b2c258fb
JB		 92 return 0;
93}
f0706e82 94
b2c258fb 95/* management interface */
f0706e82 96
b2c258fb
JB		 97static void
98ieee80211_fill_frame_info(struct ieee80211_local *local,
99 struct ieee80211_frame_info *fi,
100 struct ieee80211_rx_status *status)
101{
102 if (status) {
103 struct timespec ts;
104 struct ieee80211_rate *rate;
f0706e82 105
b2c258fb
JB		 106 jiffies_to_timespec(jiffies, &ts);
107 fi->hosttime = cpu_to_be64((u64) ts.tv_sec * 1000000 +
108 ts.tv_nsec / 1000);
109 fi->mactime = cpu_to_be64(status->mactime);
110 switch (status->phymode) {
f0706e82 111 case MODE_IEEE80211A:
b2c258fb 112 fi->phytype = htonl(ieee80211_phytype_ofdm_dot11_a);
f0706e82
JB		 113 break;
114 case MODE_IEEE80211B:
b2c258fb 115 fi->phytype = htonl(ieee80211_phytype_dsss_dot11_b);
f0706e82
JB		 116 break;
117 case MODE_IEEE80211G:
b2c258fb 118 fi->phytype = htonl(ieee80211_phytype_pbcc_dot11_g);
f0706e82
JB		 119 break;
120 case MODE_ATHEROS_TURBO:
b2c258fb
JB		 121 fi->phytype =
122 htonl(ieee80211_phytype_dsss_dot11_turbo);
f0706e82 123 break;
b2c258fb
JB		 124 default:
125 fi->phytype = htonl(0xAAAAAAAA);
f0706e82
JB		 126 break;
127 }
b2c258fb
JB		 128 fi->channel = htonl(status->channel);
129 rate = ieee80211_get_rate(local, status->phymode,
130 status->rate);
131 if (rate) {
132 fi->datarate = htonl(rate->rate);
133 if (rate->flags & IEEE80211_RATE_PREAMBLE2) {
134 if (status->rate == rate->val)
135 fi->preamble = htonl(2); /* long */
136 else if (status->rate == rate->val2)
137 fi->preamble = htonl(1); /* short */
138 } else
139 fi->preamble = htonl(0);
140 } else {
141 fi->datarate = htonl(0);
142 fi->preamble = htonl(0);
143 }
144
145 fi->antenna = htonl(status->antenna);
146 fi->priority = htonl(0xffffffff); /* no clue */
147 fi->ssi_type = htonl(ieee80211_ssi_raw);
148 fi->ssi_signal = htonl(status->ssi);
149 fi->ssi_noise = 0x00000000;
150 fi->encoding = 0;
151 } else {
152 /* clear everything because we really don't know.
153 * the msg_type field isn't present on monitor frames
154 * so we don't know whether it will be present or not,
155 * but it's ok to not clear it since it'll be assigned
156 * anyway */
157 memset(fi, 0, sizeof(*fi) - sizeof(fi->msg_type));
158
159 fi->ssi_type = htonl(ieee80211_ssi_none);
160 }
161 fi->version = htonl(IEEE80211_FI_VERSION);
162 fi->length = cpu_to_be32(sizeof(*fi) - sizeof(fi->msg_type));
163}
164
165/* this routine is actually not just for this, but also
166 * for pushing fake 'management' frames into userspace.
167 * it shall be replaced by a netlink-based system. */
168void
169ieee80211_rx_mgmt(struct ieee80211_local *local, struct sk_buff *skb,
170 struct ieee80211_rx_status *status, u32 msg_type)
171{
172 struct ieee80211_frame_info *fi;
173 const size_t hlen = sizeof(struct ieee80211_frame_info);
174 struct ieee80211_sub_if_data *sdata;
175
176 skb->dev = local->apdev;
177
178 sdata = IEEE80211_DEV_TO_SUB_IF(local->apdev);
179
180 if (skb_headroom(skb) < hlen) {
181 I802_DEBUG_INC(local->rx_expand_skb_head);
182 if (pskb_expand_head(skb, hlen, 0, GFP_ATOMIC)) {
183 dev_kfree_skb(skb);
184 return;
185 }
f0706e82 186 }
b2c258fb
JB		 187
188 fi = (struct ieee80211_frame_info *) skb_push(skb, hlen);
189
190 ieee80211_fill_frame_info(local, fi, status);
191 fi->msg_type = htonl(msg_type);
192
193 sdata->stats.rx_packets++;
194 sdata->stats.rx_bytes += skb->len;
195
196 skb_set_mac_header(skb, 0);
197 skb->ip_summed = CHECKSUM_UNNECESSARY;
198 skb->pkt_type = PACKET_OTHERHOST;
199 skb->protocol = htons(ETH_P_802_2);
200 memset(skb->cb, 0, sizeof(skb->cb));
201 netif_rx(skb);
f0706e82
JB		 202}
203
b2c258fb
JB		 204int ieee80211_radar_status(struct ieee80211_hw *hw, int channel,
205 int radar, int radar_type)
206{
207 struct sk_buff *skb;
208 struct ieee80211_radar_info *msg;
209 struct ieee80211_local *local = hw_to_local(hw);
210
211 if (!local->apdev)
212 return 0;
213
214 skb = dev_alloc_skb(sizeof(struct ieee80211_frame_info) +
215 sizeof(struct ieee80211_radar_info));
216
217 if (!skb)
218 return -ENOMEM;
219 skb_reserve(skb, sizeof(struct ieee80211_frame_info));
220
221 msg = (struct ieee80211_radar_info *)
222 skb_put(skb, sizeof(struct ieee80211_radar_info));
223 msg->channel = channel;
224 msg->radar = radar;
225 msg->radar_type = radar_type;
226
227 ieee80211_rx_mgmt(local, skb, NULL, ieee80211_msg_radar);
228 return 0;
229}
230EXPORT_SYMBOL(ieee80211_radar_status);
f0706e82 231
571ecf67
JB		 232void ieee80211_key_threshold_notify(struct net_device *dev,
233 struct ieee80211_key *key,
234 struct sta_info *sta)
f0706e82
JB		 235{
236 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
237 struct sk_buff *skb;
238 struct ieee80211_msg_key_notification *msg;
239
240 /* if no one will get it anyway, don't even allocate it.
241 * unlikely because this is only relevant for APs
242 * where the device must be open... */
243 if (unlikely(!local->apdev))
244 return;
245
246 skb = dev_alloc_skb(sizeof(struct ieee80211_frame_info) +
247 sizeof(struct ieee80211_msg_key_notification));
248 if (!skb)
249 return;
250
251 skb_reserve(skb, sizeof(struct ieee80211_frame_info));
252 msg = (struct ieee80211_msg_key_notification *)
253 skb_put(skb, sizeof(struct ieee80211_msg_key_notification));
254 msg->tx_rx_count = key->tx_rx_count;
255 memcpy(msg->ifname, dev->name, IFNAMSIZ);
256 if (sta)
257 memcpy(msg->addr, sta->addr, ETH_ALEN);
258 else
259 memset(msg->addr, 0xff, ETH_ALEN);
260
261 key->tx_rx_count = 0;
262
263 ieee80211_rx_mgmt(local, skb, NULL,
264 ieee80211_msg_key_threshold_notification);
265}
266
b2c258fb 267static int ieee80211_mgmt_open(struct net_device *dev)
f0706e82 268{
b2c258fb 269 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
f0706e82 270
b2c258fb
JB		 271 if (!netif_running(local->mdev))
272 return -EOPNOTSUPP;
273 return 0;
e2ebc74d 274}
f0706e82 275
b2c258fb 276static int ieee80211_mgmt_stop(struct net_device *dev)
e2ebc74d 277{
b2c258fb
JB		 278 return 0;
279}
f0706e82 280
b2c258fb
JB		 281static int ieee80211_change_mtu_apdev(struct net_device *dev, int new_mtu)
282{
283 /* FIX: what would be proper limits for MTU?
284 * This interface uses 802.11 frames. */
285 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN) {
286 printk(KERN_WARNING "%s: invalid MTU %d\n",
287 dev->name, new_mtu);
288 return -EINVAL;
f0706e82 289 }
f0706e82 290
b2c258fb
JB		 291#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
292 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
293#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
294 dev->mtu = new_mtu;
295 return 0;
e2ebc74d 296}
f0706e82 297
b2c258fb 298void ieee80211_if_mgmt_setup(struct net_device *dev)
e2ebc74d 299{
b2c258fb
JB		 300 ether_setup(dev);
301 dev->hard_start_xmit = ieee80211_mgmt_start_xmit;
302 dev->change_mtu = ieee80211_change_mtu_apdev;
303 dev->get_stats = ieee80211_get_stats;
304 dev->open = ieee80211_mgmt_open;
305 dev->stop = ieee80211_mgmt_stop;
306 dev->type = ARPHRD_IEEE80211_PRISM;
307 dev->hard_header_parse = header_parse_80211;
308 dev->uninit = ieee80211_if_reinit;
309 dev->destructor = ieee80211_if_free;
f0706e82
JB		 310}
311
b2c258fb 312/* regular interfaces */
f0706e82 313
b2c258fb 314static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
f0706e82 315{
b2c258fb
JB		 316 /* FIX: what would be proper limits for MTU?
317 * This interface uses 802.3 frames. */
318 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6) {
319 printk(KERN_WARNING "%s: invalid MTU %d\n",
320 dev->name, new_mtu);
321 return -EINVAL;
322 }
f0706e82 323
b2c258fb
JB		 324#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
325 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
326#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
327 dev->mtu = new_mtu;
f0706e82
JB		 328 return 0;
329}
330
b2c258fb
JB		 331static inline int identical_mac_addr_allowed(int type1, int type2)
332{
333 return (type1 == IEEE80211_IF_TYPE_MNTR ||
334 type2 == IEEE80211_IF_TYPE_MNTR ||
335 (type1 == IEEE80211_IF_TYPE_AP &&
336 type2 == IEEE80211_IF_TYPE_WDS) ||
337 (type1 == IEEE80211_IF_TYPE_WDS &&
338 (type2 == IEEE80211_IF_TYPE_WDS ||
339 type2 == IEEE80211_IF_TYPE_AP)) ||
340 (type1 == IEEE80211_IF_TYPE_AP &&
341 type2 == IEEE80211_IF_TYPE_VLAN) ||
342 (type1 == IEEE80211_IF_TYPE_VLAN &&
343 (type2 == IEEE80211_IF_TYPE_AP ||
344 type2 == IEEE80211_IF_TYPE_VLAN)));
345}
f0706e82 346
b2c258fb
JB		 347/* Check if running monitor interfaces should go to a "soft monitor" mode
348 * and switch them if necessary. */
349static inline void ieee80211_start_soft_monitor(struct ieee80211_local *local)
f0706e82 350{
b2c258fb 351 struct ieee80211_if_init_conf conf;
f0706e82 352
b2c258fb
JB		 353 if (local->open_count && local->open_count == local->monitors &&
354 !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER) &&
355 local->ops->remove_interface) {
356 conf.if_id = -1;
357 conf.type = IEEE80211_IF_TYPE_MNTR;
358 conf.mac_addr = NULL;
359 local->ops->remove_interface(local_to_hw(local), &conf);
f0706e82 360 }
f0706e82
JB		 361}
362
b2c258fb
JB		 363/* Check if running monitor interfaces should go to a "hard monitor" mode
364 * and switch them if necessary. */
365static void ieee80211_start_hard_monitor(struct ieee80211_local *local)
f0706e82 366{
b2c258fb 367 struct ieee80211_if_init_conf conf;
f0706e82 368
b2c258fb
JB		 369 if (local->open_count && local->open_count == local->monitors &&
370 !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
371 conf.if_id = -1;
372 conf.type = IEEE80211_IF_TYPE_MNTR;
373 conf.mac_addr = NULL;
374 local->ops->add_interface(local_to_hw(local), &conf);
f0706e82 375 }
e2ebc74d 376}
f0706e82 377
b2c258fb 378static int ieee80211_open(struct net_device *dev)
e2ebc74d 379{
b2c258fb
JB		 380 struct ieee80211_sub_if_data *sdata, *nsdata;
381 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
382 struct ieee80211_if_init_conf conf;
383 int res;
f0706e82 384
b2c258fb
JB		 385 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
386 read_lock(&local->sub_if_lock);
387 list_for_each_entry(nsdata, &local->sub_if_list, list) {
388 struct net_device *ndev = nsdata->dev;
e2ebc74d 389
b2c258fb
JB		 390 if (ndev != dev && ndev != local->mdev && netif_running(ndev) &&
391 compare_ether_addr(dev->dev_addr, ndev->dev_addr) == 0 &&
392 !identical_mac_addr_allowed(sdata->type, nsdata->type)) {
393 read_unlock(&local->sub_if_lock);
394 return -ENOTUNIQ;
395 }
396 }
397 read_unlock(&local->sub_if_lock);
f0706e82 398
b2c258fb
JB		 399 if (sdata->type == IEEE80211_IF_TYPE_WDS &&
400 is_zero_ether_addr(sdata->u.wds.remote_addr))
401 return -ENOLINK;
f0706e82 402
b2c258fb
JB		 403 if (sdata->type == IEEE80211_IF_TYPE_MNTR && local->open_count &&
404 !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
405 /* run the interface in a "soft monitor" mode */
406 local->monitors++;
407 local->open_count++;
408 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
409 return 0;
410 }
411 ieee80211_start_soft_monitor(local);
f0706e82 412
b2c258fb
JB		 413 conf.if_id = dev->ifindex;
414 conf.type = sdata->type;
415 conf.mac_addr = dev->dev_addr;
416 res = local->ops->add_interface(local_to_hw(local), &conf);
417 if (res) {
418 if (sdata->type == IEEE80211_IF_TYPE_MNTR)
419 ieee80211_start_hard_monitor(local);
420 return res;
421 }
f0706e82 422
b2c258fb
JB		 423 if (local->open_count == 0) {
424 res = 0;
425 tasklet_enable(&local->tx_pending_tasklet);
426 tasklet_enable(&local->tasklet);
427 if (local->ops->open)
428 res = local->ops->open(local_to_hw(local));
429 if (res == 0) {
430 res = dev_open(local->mdev);
431 if (res) {
432 if (local->ops->stop)
433 local->ops->stop(local_to_hw(local));
434 } else {
435 res = ieee80211_hw_config(local);
436 if (res && local->ops->stop)
437 local->ops->stop(local_to_hw(local));
438 else if (!res && local->apdev)
439 dev_open(local->apdev);
440 }
441 }
442 if (res) {
443 if (local->ops->remove_interface)
444 local->ops->remove_interface(local_to_hw(local),
445 &conf);
446 return res;
447 }
448 }
449 local->open_count++;
f0706e82 450
b2c258fb
JB		 451 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
452 local->monitors++;
453 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
454 } else
455 ieee80211_if_config(dev);
f0706e82 456
b2c258fb
JB		 457 if (sdata->type == IEEE80211_IF_TYPE_STA &&
458 !local->user_space_mlme)
459 netif_carrier_off(dev);
460 else
461 netif_carrier_on(dev);
f0706e82 462
b2c258fb
JB		 463 netif_start_queue(dev);
464 return 0;
f0706e82 465}
f0706e82 466
b2c258fb 467static void ieee80211_if_shutdown(struct net_device *dev)
f0706e82 468{
f0706e82 469 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
b2c258fb 470 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
f0706e82 471
b2c258fb
JB		 472 ASSERT_RTNL();
473 switch (sdata->type) {
474 case IEEE80211_IF_TYPE_STA:
475 case IEEE80211_IF_TYPE_IBSS:
476 sdata->u.sta.state = IEEE80211_DISABLED;
477 del_timer_sync(&sdata->u.sta.timer);
478 skb_queue_purge(&sdata->u.sta.skb_queue);
479 if (!local->ops->hw_scan &&
480 local->scan_dev == sdata->dev) {
481 local->sta_scanning = 0;
482 cancel_delayed_work(&local->scan_work);
483 }
484 flush_workqueue(local->hw.workqueue);
485 break;
f0706e82 486 }
f0706e82
JB		 487}
488
b2c258fb 489static int ieee80211_stop(struct net_device *dev)
f0706e82 490{
b2c258fb 491 struct ieee80211_sub_if_data *sdata;
f0706e82 492 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
f0706e82 493
b2c258fb 494 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
f0706e82 495
b2c258fb
JB		 496 if (sdata->type == IEEE80211_IF_TYPE_MNTR &&
497 local->open_count > 1 &&
498 !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
499 /* remove "soft monitor" interface */
500 local->open_count--;
501 local->monitors--;
502 if (!local->monitors)
503 local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
504 return 0;
f0706e82
JB		 505 }
506
b2c258fb
JB		 507 netif_stop_queue(dev);
508 ieee80211_if_shutdown(dev);
f0706e82 509
b2c258fb
JB		 510 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
511 local->monitors--;
512 if (!local->monitors)
513 local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
f0706e82
JB		 514 }
515
b2c258fb
JB		 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;
f0706e82 529
b2c258fb
JB		 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);
f0706e82
JB		 534 }
535
b2c258fb
JB		 536 ieee80211_start_hard_monitor(local);
537
f0706e82
JB		 538 return 0;
539}
540
541enum netif_tx_lock_class {
542 TX_LOCK_NORMAL,
543 TX_LOCK_MASTER,
544};
545
546static 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
552static 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) ^ (sdata->allmulti != 0)) {
560 if (sdata->allmulti) {
561 sdata->allmulti = 0;
562 local->iff_allmultis--;
563 } else {
564 sdata->allmulti = 1;
565 local->iff_allmultis++;
566 }
567 }
568 if (((dev->flags & IFF_PROMISC) != 0) ^ (sdata->promisc != 0)) {
569 if (sdata->promisc) {
570 sdata->promisc = 0;
571 local->iff_promiscs--;
572 } else {
573 sdata->promisc = 1;
574 local->iff_promiscs++;
575 }
576 }
577 if (dev->mc_count != sdata->mc_count) {
578 local->mc_count = local->mc_count - sdata->mc_count +
579 dev->mc_count;
580 sdata->mc_count = dev->mc_count;
581 }
582 if (local->ops->set_multicast_list) {
583 flags = local->mdev->flags;
584 if (local->iff_allmultis)
585 flags |= IFF_ALLMULTI;
586 if (local->iff_promiscs)
587 flags |= IFF_PROMISC;
588 read_lock(&local->sub_if_lock);
589 local->ops->set_multicast_list(local_to_hw(local), flags,
590 local->mc_count);
591 read_unlock(&local->sub_if_lock);
592 }
593 netif_tx_unlock(local->mdev);
594}
595
b2c258fb
JB		 596/* Must not be called for mdev and apdev */
597void ieee80211_if_setup(struct net_device *dev)
f0706e82 598{
b2c258fb
JB		 599 ether_setup(dev);
600 dev->hard_start_xmit = ieee80211_subif_start_xmit;
601 dev->wireless_handlers = &ieee80211_iw_handler_def;
602 dev->set_multicast_list = ieee80211_set_multicast_list;
603 dev->change_mtu = ieee80211_change_mtu;
604 dev->get_stats = ieee80211_get_stats;
605 dev->open = ieee80211_open;
606 dev->stop = ieee80211_stop;
607 dev->uninit = ieee80211_if_reinit;
608 dev->destructor = ieee80211_if_free;
609}
f0706e82 610
b2c258fb
JB		 611/* WDS specialties */
612
613int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr)
614{
615 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
616 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
617 struct sta_info *sta;
618
619 if (compare_ether_addr(remote_addr, sdata->u.wds.remote_addr) == 0)
620 return 0;
621
622 /* Create STA entry for the new peer */
623 sta = sta_info_add(local, dev, remote_addr, GFP_KERNEL);
624 if (!sta)
625 return -ENOMEM;
626 sta_info_put(sta);
627
628 /* Remove STA entry for the old peer */
629 sta = sta_info_get(local, sdata->u.wds.remote_addr);
630 if (sta) {
be8755e1 631 sta_info_free(sta);
b2c258fb 632 sta_info_put(sta);
b2c258fb
JB		 633 } else {
634 printk(KERN_DEBUG "%s: could not find STA entry for WDS link "
635 "peer " MAC_FMT "\n",
636 dev->name, MAC_ARG(sdata->u.wds.remote_addr));
637 }
638
639 /* Update WDS link data */
640 memcpy(&sdata->u.wds.remote_addr, remote_addr, ETH_ALEN);
641
642 return 0;
f0706e82 643}
f0706e82 644
b2c258fb
JB		 645/* everything else */
646
b2c258fb
JB		 647static int __ieee80211_if_config(struct net_device *dev,
648 struct sk_buff *beacon,
649 struct ieee80211_tx_control *control)
650{
651 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
652 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
653 struct ieee80211_if_conf conf;
654 static u8 scan_bssid[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
655
656 if (!local->ops->config_interface || !netif_running(dev))
f0706e82 657 return 0;
f0706e82 658
b2c258fb 659 memset(&conf, 0, sizeof(conf));
4480f15c 660 conf.type = sdata->type;
b2c258fb
JB		 661 if (sdata->type == IEEE80211_IF_TYPE_STA ||
662 sdata->type == IEEE80211_IF_TYPE_IBSS) {
663 if (local->sta_scanning &&
664 local->scan_dev == dev)
665 conf.bssid = scan_bssid;
666 else
667 conf.bssid = sdata->u.sta.bssid;
668 conf.ssid = sdata->u.sta.ssid;
669 conf.ssid_len = sdata->u.sta.ssid_len;
670 conf.generic_elem = sdata->u.sta.extra_ie;
671 conf.generic_elem_len = sdata->u.sta.extra_ie_len;
672 } else if (sdata->type == IEEE80211_IF_TYPE_AP) {
673 conf.ssid = sdata->u.ap.ssid;
674 conf.ssid_len = sdata->u.ap.ssid_len;
675 conf.generic_elem = sdata->u.ap.generic_elem;
676 conf.generic_elem_len = sdata->u.ap.generic_elem_len;
677 conf.beacon = beacon;
678 conf.beacon_control = control;
f0706e82 679 }
b2c258fb
JB		 680 return local->ops->config_interface(local_to_hw(local),
681 dev->ifindex, &conf);
f0706e82
JB		 682}
683
b2c258fb
JB		 684int ieee80211_if_config(struct net_device *dev)
685{
686 return __ieee80211_if_config(dev, NULL, NULL);
687}
f0706e82 688
b2c258fb 689int ieee80211_if_config_beacon(struct net_device *dev)
f0706e82 690{
f0706e82 691 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
b2c258fb
JB		 692 struct ieee80211_tx_control control;
693 struct sk_buff *skb;
f0706e82 694
b2c258fb 695 if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
f0706e82 696 return 0;
b2c258fb
JB		 697 skb = ieee80211_beacon_get(local_to_hw(local), dev->ifindex, &control);
698 if (!skb)
699 return -ENOMEM;
700 return __ieee80211_if_config(dev, skb, &control);
701}
f0706e82 702
b2c258fb
JB		 703int ieee80211_hw_config(struct ieee80211_local *local)
704{
705 struct ieee80211_hw_mode *mode;
706 struct ieee80211_channel *chan;
707 int ret = 0;
f0706e82 708
b2c258fb
JB		 709 if (local->sta_scanning) {
710 chan = local->scan_channel;
711 mode = local->scan_hw_mode;
712 } else {
713 chan = local->oper_channel;
714 mode = local->oper_hw_mode;
f0706e82
JB		 715 }
716
b2c258fb
JB		 717 local->hw.conf.channel = chan->chan;
718 local->hw.conf.channel_val = chan->val;
719 local->hw.conf.power_level = chan->power_level;
720 local->hw.conf.freq = chan->freq;
721 local->hw.conf.phymode = mode->mode;
722 local->hw.conf.antenna_max = chan->antenna_max;
723 local->hw.conf.chan = chan;
724 local->hw.conf.mode = mode;
f0706e82 725
b2c258fb
JB		 726#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
727 printk(KERN_DEBUG "HW CONFIG: channel=%d freq=%d "
728 "phymode=%d\n", local->hw.conf.channel, local->hw.conf.freq,
729 local->hw.conf.phymode);
730#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
731
732 if (local->ops->config)
733 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
f0706e82 734
b2c258fb
JB		 735 return ret;
736}
f0706e82 737
b2c258fb
JB		 738struct dev_mc_list *ieee80211_get_mc_list_item(struct ieee80211_hw *hw,
739 struct dev_mc_list *prev,
740 void **ptr)
f0706e82 741{
b2c258fb
JB		 742 struct ieee80211_local *local = hw_to_local(hw);
743 struct ieee80211_sub_if_data *sdata = *ptr;
744 struct dev_mc_list *mc;
745
746 if (!prev) {
747 WARN_ON(sdata);
748 sdata = NULL;
749 }
750 if (!prev || !prev->next) {
751 if (sdata)
752 sdata = list_entry(sdata->list.next,
753 struct ieee80211_sub_if_data, list);
754 else
755 sdata = list_entry(local->sub_if_list.next,
756 struct ieee80211_sub_if_data, list);
757 if (&sdata->list != &local->sub_if_list)
758 mc = sdata->dev->mc_list;
759 else
760 mc = NULL;
761 } else
762 mc = prev->next;
763
764 *ptr = sdata;
765 return mc;
f0706e82 766}
b2c258fb 767EXPORT_SYMBOL(ieee80211_get_mc_list_item);
f0706e82 768
f0706e82
JB		 769static void ieee80211_stat_refresh(unsigned long data)
770{
771 struct ieee80211_local *local = (struct ieee80211_local *) data;
772 struct sta_info *sta;
773 struct ieee80211_sub_if_data *sdata;
774
775 if (!local->stat_time)
776 return;
777
778 /* go through all stations */
be8755e1 779 read_lock_bh(&local->sta_lock);
f0706e82
JB		 780 list_for_each_entry(sta, &local->sta_list, list) {
781 sta->channel_use = (sta->channel_use_raw / local->stat_time) /
782 CHAN_UTIL_PER_10MS;
783 sta->channel_use_raw = 0;
784 }
be8755e1 785 read_unlock_bh(&local->sta_lock);
f0706e82
JB		 786
787 /* go through all subinterfaces */
788 read_lock(&local->sub_if_lock);
789 list_for_each_entry(sdata, &local->sub_if_list, list) {
790 sdata->channel_use = (sdata->channel_use_raw /
791 local->stat_time) / CHAN_UTIL_PER_10MS;
792 sdata->channel_use_raw = 0;
793 }
794 read_unlock(&local->sub_if_lock);
795
796 /* hardware interface */
797 local->channel_use = (local->channel_use_raw /
798 local->stat_time) / CHAN_UTIL_PER_10MS;
799 local->channel_use_raw = 0;
800
801 local->stat_timer.expires = jiffies + HZ * local->stat_time / 100;
802 add_timer(&local->stat_timer);
803}
804
f0706e82
JB		 805void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
806 struct sk_buff *skb,
807 struct ieee80211_tx_status *status)
808{
809 struct ieee80211_local *local = hw_to_local(hw);
810 struct ieee80211_tx_status *saved;
811 int tmp;
812
813 skb->dev = local->mdev;
814 saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC);
815 if (unlikely(!saved)) {
816 if (net_ratelimit())
817 printk(KERN_WARNING "%s: Not enough memory, "
818 "dropping tx status", skb->dev->name);
819 /* should be dev_kfree_skb_irq, but due to this function being
820 * named _irqsafe instead of just _irq we can't be sure that
821 * people won't call it from non-irq contexts */
822 dev_kfree_skb_any(skb);
823 return;
824 }
825 memcpy(saved, status, sizeof(struct ieee80211_tx_status));
826 /* copy pointer to saved status into skb->cb for use by tasklet */
827 memcpy(skb->cb, &saved, sizeof(saved));
828
829 skb->pkt_type = IEEE80211_TX_STATUS_MSG;
830 skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ?
831 &local->skb_queue : &local->skb_queue_unreliable, skb);
832 tmp = skb_queue_len(&local->skb_queue) +
833 skb_queue_len(&local->skb_queue_unreliable);
834 while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
835 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
836 memcpy(&saved, skb->cb, sizeof(saved));
837 kfree(saved);
838 dev_kfree_skb_irq(skb);
839 tmp--;
840 I802_DEBUG_INC(local->tx_status_drop);
841 }
842 tasklet_schedule(&local->tasklet);
843}
844EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
845
846static void ieee80211_tasklet_handler(unsigned long data)
847{
848 struct ieee80211_local *local = (struct ieee80211_local *) data;
849 struct sk_buff *skb;
850 struct ieee80211_rx_status rx_status;
851 struct ieee80211_tx_status *tx_status;
852
853 while ((skb = skb_dequeue(&local->skb_queue)) ||
854 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
855 switch (skb->pkt_type) {
856 case IEEE80211_RX_MSG:
857 /* status is in skb->cb */
858 memcpy(&rx_status, skb->cb, sizeof(rx_status));
859 /* Clear skb->type in order to not confuse kernel
860 * netstack. */
861 skb->pkt_type = 0;
862 __ieee80211_rx(local_to_hw(local), skb, &rx_status);
863 break;
864 case IEEE80211_TX_STATUS_MSG:
865 /* get pointer to saved status out of skb->cb */
866 memcpy(&tx_status, skb->cb, sizeof(tx_status));
867 skb->pkt_type = 0;
868 ieee80211_tx_status(local_to_hw(local),
869 skb, tx_status);
870 kfree(tx_status);
871 break;
872 default: /* should never get here! */
873 printk(KERN_ERR "%s: Unknown message type (%d)\n",
874 local->mdev->name, skb->pkt_type);
875 dev_kfree_skb(skb);
876 break;
877 }
878 }
879}
880
f0706e82
JB		 881/* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
882 * make a prepared TX frame (one that has been given to hw) to look like brand
883 * new IEEE 802.11 frame that is ready to go through TX processing again.
884 * Also, tx_packet_data in cb is restored from tx_control. */
885static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
886 struct ieee80211_key *key,
887 struct sk_buff *skb,
888 struct ieee80211_tx_control *control)
889{
890 int hdrlen, iv_len, mic_len;
891 struct ieee80211_tx_packet_data *pkt_data;
892
893 pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
894 pkt_data->ifindex = control->ifindex;
895 pkt_data->mgmt_iface = (control->type == IEEE80211_IF_TYPE_MGMT);
896 pkt_data->req_tx_status = !!(control->flags & IEEE80211_TXCTL_REQ_TX_STATUS);
897 pkt_data->do_not_encrypt = !!(control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT);
898 pkt_data->requeue = !!(control->flags & IEEE80211_TXCTL_REQUEUE);
899 pkt_data->queue = control->queue;
900
901 hdrlen = ieee80211_get_hdrlen_from_skb(skb);
902
903 if (!key)
904 goto no_key;
905
906 switch (key->alg) {
907 case ALG_WEP:
908 iv_len = WEP_IV_LEN;
909 mic_len = WEP_ICV_LEN;
910 break;
911 case ALG_TKIP:
912 iv_len = TKIP_IV_LEN;
913 mic_len = TKIP_ICV_LEN;
914 break;
915 case ALG_CCMP:
916 iv_len = CCMP_HDR_LEN;
917 mic_len = CCMP_MIC_LEN;
918 break;
919 default:
920 goto no_key;
921 }
922
923 if (skb->len >= mic_len && key->force_sw_encrypt)
924 skb_trim(skb, skb->len - mic_len);
925 if (skb->len >= iv_len && skb->len > hdrlen) {
926 memmove(skb->data + iv_len, skb->data, hdrlen);
927 skb_pull(skb, iv_len);
928 }
929
930no_key:
931 {
932 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
933 u16 fc = le16_to_cpu(hdr->frame_control);
934 if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
935 fc &= ~IEEE80211_STYPE_QOS_DATA;
936 hdr->frame_control = cpu_to_le16(fc);
937 memmove(skb->data + 2, skb->data, hdrlen - 2);
938 skb_pull(skb, 2);
939 }
940 }
941}
942
f0706e82
JB		 943void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
944 struct ieee80211_tx_status *status)
945{
946 struct sk_buff *skb2;
947 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
948 struct ieee80211_local *local = hw_to_local(hw);
949 u16 frag, type;
950 u32 msg_type;
b306f453
JB		 951 struct ieee80211_tx_status_rtap_hdr *rthdr;
952 struct ieee80211_sub_if_data *sdata;
953 int monitors;
f0706e82
JB		 954
955 if (!status) {
956 printk(KERN_ERR
957 "%s: ieee80211_tx_status called with NULL status\n",
958 local->mdev->name);
959 dev_kfree_skb(skb);
960 return;
961 }
962
963 if (status->excessive_retries) {
964 struct sta_info *sta;
965 sta = sta_info_get(local, hdr->addr1);
966 if (sta) {
967 if (sta->flags & WLAN_STA_PS) {
968 /* The STA is in power save mode, so assume
969 * that this TX packet failed because of that.
970 */
971 status->excessive_retries = 0;
972 status->flags |= IEEE80211_TX_STATUS_TX_FILTERED;
973 }
974 sta_info_put(sta);
975 }
976 }
977
978 if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) {
979 struct sta_info *sta;
980 sta = sta_info_get(local, hdr->addr1);
981 if (sta) {
982 sta->tx_filtered_count++;
983
984 /* Clear the TX filter mask for this STA when sending
985 * the next packet. If the STA went to power save mode,
986 * this will happen when it is waking up for the next
987 * time. */
988 sta->clear_dst_mask = 1;
989
990 /* TODO: Is the WLAN_STA_PS flag always set here or is
991 * the race between RX and TX status causing some
992 * packets to be filtered out before 80211.o gets an
993 * update for PS status? This seems to be the case, so
994 * no changes are likely to be needed. */
995 if (sta->flags & WLAN_STA_PS &&
996 skb_queue_len(&sta->tx_filtered) <
997 STA_MAX_TX_BUFFER) {
998 ieee80211_remove_tx_extra(local, sta->key,
999 skb,
1000 &status->control);
1001 skb_queue_tail(&sta->tx_filtered, skb);
1002 } else if (!(sta->flags & WLAN_STA_PS) &&
1003 !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) {
1004 /* Software retry the packet once */
1005 status->control.flags |= IEEE80211_TXCTL_REQUEUE;
1006 ieee80211_remove_tx_extra(local, sta->key,
1007 skb,
1008 &status->control);
1009 dev_queue_xmit(skb);
1010 } else {
1011 if (net_ratelimit()) {
1012 printk(KERN_DEBUG "%s: dropped TX "
1013 "filtered frame queue_len=%d "
1014 "PS=%d @%lu\n",
1015 local->mdev->name,
1016 skb_queue_len(
1017 &sta->tx_filtered),
1018 !!(sta->flags & WLAN_STA_PS),
1019 jiffies);
1020 }
1021 dev_kfree_skb(skb);
1022 }
1023 sta_info_put(sta);
1024 return;
1025 }
1026 } else {
1027 /* FIXME: STUPID to call this with both local and local->mdev */
1028 rate_control_tx_status(local, local->mdev, skb, status);
1029 }
1030
1031 ieee80211_led_tx(local, 0);
1032
1033 /* SNMP counters
1034 * Fragments are passed to low-level drivers as separate skbs, so these
1035 * are actually fragments, not frames. Update frame counters only for
1036 * the first fragment of the frame. */
1037
1038 frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
1039 type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
1040
1041 if (status->flags & IEEE80211_TX_STATUS_ACK) {
1042 if (frag == 0) {
1043 local->dot11TransmittedFrameCount++;
1044 if (is_multicast_ether_addr(hdr->addr1))
1045 local->dot11MulticastTransmittedFrameCount++;
1046 if (status->retry_count > 0)
1047 local->dot11RetryCount++;
1048 if (status->retry_count > 1)
1049 local->dot11MultipleRetryCount++;
1050 }
1051
1052 /* This counter shall be incremented for an acknowledged MPDU
1053 * with an individual address in the address 1 field or an MPDU
1054 * with a multicast address in the address 1 field of type Data
1055 * or Management. */
1056 if (!is_multicast_ether_addr(hdr->addr1) ||
1057 type == IEEE80211_FTYPE_DATA ||
1058 type == IEEE80211_FTYPE_MGMT)
1059 local->dot11TransmittedFragmentCount++;
1060 } else {
1061 if (frag == 0)
1062 local->dot11FailedCount++;
1063 }
1064
b306f453
JB		 1065 msg_type = (status->flags & IEEE80211_TX_STATUS_ACK) ?
1066 ieee80211_msg_tx_callback_ack : ieee80211_msg_tx_callback_fail;
1067
1068 /* this was a transmitted frame, but now we want to reuse it */
1069 skb_orphan(skb);
1070
1071 if ((status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS) &&
1072 local->apdev) {
1073 if (local->monitors) {
1074 skb2 = skb_clone(skb, GFP_ATOMIC);
1075 } else {
1076 skb2 = skb;
1077 skb = NULL;
1078 }
1079
1080 if (skb2)
1081 /* Send frame to hostapd */
1082 ieee80211_rx_mgmt(local, skb2, NULL, msg_type);
1083
1084 if (!skb)
1085 return;
1086 }
1087
1088 if (!local->monitors) {
f0706e82
JB		 1089 dev_kfree_skb(skb);
1090 return;
1091 }
1092
b306f453 1093 /* send frame to monitor interfaces now */
f0706e82 1094
b306f453
JB		 1095 if (skb_headroom(skb) < sizeof(*rthdr)) {
1096 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
f0706e82
JB		 1097 dev_kfree_skb(skb);
1098 return;
1099 }
f0706e82 1100
b306f453
JB		 1101 rthdr = (struct ieee80211_tx_status_rtap_hdr*)
1102 skb_push(skb, sizeof(*rthdr));
1103
1104 memset(rthdr, 0, sizeof(*rthdr));
1105 rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
1106 rthdr->hdr.it_present =
1107 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
1108 (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
1109
1110 if (!(status->flags & IEEE80211_TX_STATUS_ACK) &&
1111 !is_multicast_ether_addr(hdr->addr1))
1112 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
1113
1114 if ((status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) &&
1115 (status->control.flags & IEEE80211_TXCTL_USE_CTS_PROTECT))
1116 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
1117 else if (status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS)
1118 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
1119
1120 rthdr->data_retries = status->retry_count;
1121
1122 read_lock(&local->sub_if_lock);
1123 monitors = local->monitors;
1124 list_for_each_entry(sdata, &local->sub_if_list, list) {
1125 /*
1126 * Using the monitors counter is possibly racy, but
1127 * if the value is wrong we simply either clone the skb
1128 * once too much or forget sending it to one monitor iface
1129 * The latter case isn't nice but fixing the race is much
1130 * more complicated.
1131 */
1132 if (!monitors || !skb)
1133 goto out;
1134
1135 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
1136 if (!netif_running(sdata->dev))
1137 continue;
1138 monitors--;
1139 if (monitors)
1140 skb2 = skb_clone(skb, GFP_KERNEL);
1141 else
1142 skb2 = NULL;
1143 skb->dev = sdata->dev;
1144 /* XXX: is this sufficient for BPF? */
1145 skb_set_mac_header(skb, 0);
1146 skb->ip_summed = CHECKSUM_UNNECESSARY;
1147 skb->pkt_type = PACKET_OTHERHOST;
1148 skb->protocol = htons(ETH_P_802_2);
1149 memset(skb->cb, 0, sizeof(skb->cb));
1150 netif_rx(skb);
1151 skb = skb2;
b306f453
JB		 1152 }
1153 }
1154 out:
1155 read_unlock(&local->sub_if_lock);
1156 if (skb)
1157 dev_kfree_skb(skb);
f0706e82
JB		 1158}
1159EXPORT_SYMBOL(ieee80211_tx_status);
1160
f0706e82
JB		 1161struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
1162 const struct ieee80211_ops *ops)
1163{
1164 struct net_device *mdev;
1165 struct ieee80211_local *local;
1166 struct ieee80211_sub_if_data *sdata;
1167 int priv_size;
1168 struct wiphy *wiphy;
1169
1170 /* Ensure 32-byte alignment of our private data and hw private data.
1171 * We use the wiphy priv data for both our ieee80211_local and for
1172 * the driver's private data
1173 *
1174 * In memory it'll be like this:
1175 *
1176 * +-------------------------+
1177 * | struct wiphy |
1178 * +-------------------------+
1179 * | struct ieee80211_local |
1180 * +-------------------------+
1181 * | driver's private data |
1182 * +-------------------------+
1183 *
1184 */
1185 priv_size = ((sizeof(struct ieee80211_local) +
1186 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
1187 priv_data_len;
1188
1189 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
1190
1191 if (!wiphy)
1192 return NULL;
1193
1194 wiphy->privid = mac80211_wiphy_privid;
1195
1196 local = wiphy_priv(wiphy);
1197 local->hw.wiphy = wiphy;
1198
1199 local->hw.priv = (char *)local +
1200 ((sizeof(struct ieee80211_local) +
1201 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
1202
4480f15c
JB		 1203 BUG_ON(!ops->tx);
1204 BUG_ON(!ops->config);
1205 BUG_ON(!ops->add_interface);
f0706e82
JB		 1206 local->ops = ops;
1207
1208 /* for now, mdev needs sub_if_data :/ */
1209 mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
1210 "wmaster%d", ether_setup);
1211 if (!mdev) {
1212 wiphy_free(wiphy);
1213 return NULL;
1214 }
1215
1216 sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
1217 mdev->ieee80211_ptr = &sdata->wdev;
1218 sdata->wdev.wiphy = wiphy;
1219
1220 local->hw.queues = 1; /* default */
1221
1222 local->mdev = mdev;
1223 local->rx_pre_handlers = ieee80211_rx_pre_handlers;
1224 local->rx_handlers = ieee80211_rx_handlers;
1225 local->tx_handlers = ieee80211_tx_handlers;
1226
1227 local->bridge_packets = 1;
1228
1229 local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1230 local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1231 local->short_retry_limit = 7;
1232 local->long_retry_limit = 4;
1233 local->hw.conf.radio_enabled = 1;
f0706e82
JB		 1234
1235 local->enabled_modes = (unsigned int) -1;
1236
1237 INIT_LIST_HEAD(&local->modes_list);
1238
1239 rwlock_init(&local->sub_if_lock);
1240 INIT_LIST_HEAD(&local->sub_if_list);
1241
1242 INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
1243 init_timer(&local->stat_timer);
1244 local->stat_timer.function = ieee80211_stat_refresh;
1245 local->stat_timer.data = (unsigned long) local;
1246 ieee80211_rx_bss_list_init(mdev);
1247
1248 sta_info_init(local);
1249
1250 mdev->hard_start_xmit = ieee80211_master_start_xmit;
1251 mdev->open = ieee80211_master_open;
1252 mdev->stop = ieee80211_master_stop;
1253 mdev->type = ARPHRD_IEEE80211;
1254 mdev->hard_header_parse = header_parse_80211;
1255
1256 sdata->type = IEEE80211_IF_TYPE_AP;
1257 sdata->dev = mdev;
1258 sdata->local = local;
1259 sdata->u.ap.force_unicast_rateidx = -1;
1260 sdata->u.ap.max_ratectrl_rateidx = -1;
1261 ieee80211_if_sdata_init(sdata);
1262 list_add_tail(&sdata->list, &local->sub_if_list);
1263
1264 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1265 (unsigned long)local);
1266 tasklet_disable(&local->tx_pending_tasklet);
1267
1268 tasklet_init(&local->tasklet,
1269 ieee80211_tasklet_handler,
1270 (unsigned long) local);
1271 tasklet_disable(&local->tasklet);
1272
1273 skb_queue_head_init(&local->skb_queue);
1274 skb_queue_head_init(&local->skb_queue_unreliable);
1275
1276 return local_to_hw(local);
1277}
1278EXPORT_SYMBOL(ieee80211_alloc_hw);
1279
1280int ieee80211_register_hw(struct ieee80211_hw *hw)
1281{
1282 struct ieee80211_local *local = hw_to_local(hw);
1283 const char *name;
1284 int result;
1285
1286 result = wiphy_register(local->hw.wiphy);
1287 if (result < 0)
1288 return result;
1289
1290 name = wiphy_dev(local->hw.wiphy)->driver->name;
1291 local->hw.workqueue = create_singlethread_workqueue(name);
1292 if (!local->hw.workqueue) {
1293 result = -ENOMEM;
1294 goto fail_workqueue;
1295 }
1296
b306f453
JB		 1297 /*
1298 * The hardware needs headroom for sending the frame,
1299 * and we need some headroom for passing the frame to monitor
1300 * interfaces, but never both at the same time.
1301 */
33ccad35
JB		 1302 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1303 sizeof(struct ieee80211_tx_status_rtap_hdr));
b306f453 1304
e9f207f0
JB		 1305 debugfs_hw_add(local);
1306
f0706e82
JB		 1307 local->hw.conf.beacon_int = 1000;
1308
1309 local->wstats_flags |= local->hw.max_rssi ?
1310 IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID;
1311 local->wstats_flags |= local->hw.max_signal ?
1312 IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1313 local->wstats_flags |= local->hw.max_noise ?
1314 IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1315 if (local->hw.max_rssi < 0 || local->hw.max_noise < 0)
1316 local->wstats_flags |= IW_QUAL_DBM;
1317
1318 result = sta_info_start(local);
1319 if (result < 0)
1320 goto fail_sta_info;
1321
1322 rtnl_lock();
1323 result = dev_alloc_name(local->mdev, local->mdev->name);
1324 if (result < 0)
1325 goto fail_dev;
1326
1327 memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1328 SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1329
1330 result = register_netdevice(local->mdev);
1331 if (result < 0)
1332 goto fail_dev;
1333
e9f207f0
JB		 1334 ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1335
f0706e82
JB		 1336 result = ieee80211_init_rate_ctrl_alg(local, NULL);
1337 if (result < 0) {
1338 printk(KERN_DEBUG "%s: Failed to initialize rate control "
1339 "algorithm\n", local->mdev->name);
1340 goto fail_rate;
1341 }
1342
1343 result = ieee80211_wep_init(local);
1344
1345 if (result < 0) {
1346 printk(KERN_DEBUG "%s: Failed to initialize wep\n",
1347 local->mdev->name);
1348 goto fail_wep;
1349 }
1350
1351 ieee80211_install_qdisc(local->mdev);
1352
1353 /* add one default STA interface */
1354 result = ieee80211_if_add(local->mdev, "wlan%d", NULL,
1355 IEEE80211_IF_TYPE_STA);
1356 if (result)
1357 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
1358 local->mdev->name);
1359
1360 local->reg_state = IEEE80211_DEV_REGISTERED;
1361 rtnl_unlock();
1362
1363 ieee80211_led_init(local);
1364
1365 return 0;
1366
1367fail_wep:
1368 rate_control_deinitialize(local);
1369fail_rate:
e9f207f0 1370 ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
f0706e82
JB		 1371 unregister_netdevice(local->mdev);
1372fail_dev:
1373 rtnl_unlock();
1374 sta_info_stop(local);
1375fail_sta_info:
e9f207f0 1376 debugfs_hw_del(local);
f0706e82
JB		 1377 destroy_workqueue(local->hw.workqueue);
1378fail_workqueue:
1379 wiphy_unregister(local->hw.wiphy);
1380 return result;
1381}
1382EXPORT_SYMBOL(ieee80211_register_hw);
1383
1384int ieee80211_register_hwmode(struct ieee80211_hw *hw,
1385 struct ieee80211_hw_mode *mode)
1386{
1387 struct ieee80211_local *local = hw_to_local(hw);
1388 struct ieee80211_rate *rate;
1389 int i;
1390
1391 INIT_LIST_HEAD(&mode->list);
1392 list_add_tail(&mode->list, &local->modes_list);
1393
1394 local->hw_modes |= (1 << mode->mode);
1395 for (i = 0; i < mode->num_rates; i++) {
1396 rate = &(mode->rates[i]);
1397 rate->rate_inv = CHAN_UTIL_RATE_LCM / rate->rate;
1398 }
1399 ieee80211_prepare_rates(local, mode);
1400
1401 if (!local->oper_hw_mode) {
1402 /* Default to this mode */
1403 local->hw.conf.phymode = mode->mode;
1404 local->oper_hw_mode = local->scan_hw_mode = mode;
1405 local->oper_channel = local->scan_channel = &mode->channels[0];
1406 local->hw.conf.mode = local->oper_hw_mode;
1407 local->hw.conf.chan = local->oper_channel;
1408 }
1409
1410 if (!(hw->flags & IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED))
fd8bacc9 1411 ieee80211_set_default_regdomain(mode);
f0706e82
JB		 1412
1413 return 0;
1414}
1415EXPORT_SYMBOL(ieee80211_register_hwmode);
1416
1417void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1418{
1419 struct ieee80211_local *local = hw_to_local(hw);
1420 struct ieee80211_sub_if_data *sdata, *tmp;
1421 struct list_head tmp_list;
1422 int i;
1423
1424 tasklet_kill(&local->tx_pending_tasklet);
1425 tasklet_kill(&local->tasklet);
1426
1427 rtnl_lock();
1428
1429 BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED);
1430
1431 local->reg_state = IEEE80211_DEV_UNREGISTERED;
1432 if (local->apdev)
1433 ieee80211_if_del_mgmt(local);
1434
1435 write_lock_bh(&local->sub_if_lock);
1436 list_replace_init(&local->sub_if_list, &tmp_list);
1437 write_unlock_bh(&local->sub_if_lock);
1438
1439 list_for_each_entry_safe(sdata, tmp, &tmp_list, list)
1440 __ieee80211_if_del(local, sdata);
1441
1442 rtnl_unlock();
1443
1444 if (local->stat_time)
1445 del_timer_sync(&local->stat_timer);
1446
1447 ieee80211_rx_bss_list_deinit(local->mdev);
1448 ieee80211_clear_tx_pending(local);
1449 sta_info_stop(local);
1450 rate_control_deinitialize(local);
e9f207f0 1451 debugfs_hw_del(local);
f0706e82
JB		 1452
1453 for (i = 0; i < NUM_IEEE80211_MODES; i++) {
1454 kfree(local->supp_rates[i]);
1455 kfree(local->basic_rates[i]);
1456 }
1457
1458 if (skb_queue_len(&local->skb_queue)
1459 || skb_queue_len(&local->skb_queue_unreliable))
1460 printk(KERN_WARNING "%s: skb_queue not empty\n",
1461 local->mdev->name);
1462 skb_queue_purge(&local->skb_queue);
1463 skb_queue_purge(&local->skb_queue_unreliable);
1464
1465 destroy_workqueue(local->hw.workqueue);
1466 wiphy_unregister(local->hw.wiphy);
1467 ieee80211_wep_free(local);
1468 ieee80211_led_exit(local);
1469}
1470EXPORT_SYMBOL(ieee80211_unregister_hw);
1471
1472void ieee80211_free_hw(struct ieee80211_hw *hw)
1473{
1474 struct ieee80211_local *local = hw_to_local(hw);
1475
1476 ieee80211_if_free(local->mdev);
1477 wiphy_free(local->hw.wiphy);
1478}
1479EXPORT_SYMBOL(ieee80211_free_hw);
1480
f0706e82
JB		 1481struct net_device_stats *ieee80211_dev_stats(struct net_device *dev)
1482{
1483 struct ieee80211_sub_if_data *sdata;
1484 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1485 return &sdata->stats;
1486}
1487
1488static int __init ieee80211_init(void)
1489{
1490 struct sk_buff *skb;
1491 int ret;
1492
1493 BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb));
1494
1495 ret = ieee80211_wme_register();
1496 if (ret) {
1497 printk(KERN_DEBUG "ieee80211_init: failed to "
1498 "initialize WME (err=%d)\n", ret);
1499 return ret;
1500 }
1501
e9f207f0 1502 ieee80211_debugfs_netdev_init();
fd8bacc9 1503 ieee80211_regdomain_init();
e9f207f0 1504
f0706e82
JB		 1505 return 0;
1506}
1507
f0706e82
JB		 1508static void __exit ieee80211_exit(void)
1509{
1510 ieee80211_wme_unregister();
e9f207f0 1511 ieee80211_debugfs_netdev_exit();
f0706e82
JB		 1512}
1513
1514
ca9938fe 1515subsys_initcall(ieee80211_init);
f0706e82
JB		 1516module_exit(ieee80211_exit);
1517
1518MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1519MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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