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[IEEE80211]: Fix softmac lockdep reports.
[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 23#include <linux/bitmap.h>
881d966b 24#include <net/net_namespace.h>
f0706e82
JB		 25#include <net/cfg80211.h>
26
27#include "ieee80211_common.h"
28#include "ieee80211_i.h"
29#include "ieee80211_rate.h"
30#include "wep.h"
f0706e82
JB		 31#include "wme.h"
32#include "aes_ccm.h"
33#include "ieee80211_led.h"
34#include "ieee80211_cfg.h"
e9f207f0
JB		 35#include "debugfs.h"
36#include "debugfs_netdev.h"
f0706e82 37
b306f453
JB		 38/*
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
b2c258fb 48/* common interface routines */
b306f453 49
b2c258fb
JB		 50static int header_parse_80211(struct sk_buff *skb, unsigned char *haddr)
51{
52 memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
53 return ETH_ALEN;
54}
f0706e82 55
b2c258fb 56/* master interface */
f0706e82 57
b2c258fb
JB		 58static int ieee80211_master_open(struct net_device *dev)
59{
60 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
61 struct ieee80211_sub_if_data *sdata;
62 int res = -EOPNOTSUPP;
f0706e82 63
b2c258fb
JB		 64 read_lock(&local->sub_if_lock);
65 list_for_each_entry(sdata, &local->sub_if_list, list) {
66 if (sdata->dev != dev && netif_running(sdata->dev)) {
67 res = 0;
68 break;
69 }
70 }
71 read_unlock(&local->sub_if_lock);
72 return res;
73}
f0706e82 74
b2c258fb 75static int ieee80211_master_stop(struct net_device *dev)
f0706e82 76{
b2c258fb
JB		 77 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
78 struct ieee80211_sub_if_data *sdata;
f0706e82 79
b2c258fb
JB		 80 read_lock(&local->sub_if_lock);
81 list_for_each_entry(sdata, &local->sub_if_list, list)
82 if (sdata->dev != dev && netif_running(sdata->dev))
83 dev_close(sdata->dev);
84 read_unlock(&local->sub_if_lock);
f0706e82 85
b2c258fb
JB		 86 return 0;
87}
f0706e82 88
b2c258fb 89/* management interface */
f0706e82 90
b2c258fb
JB		 91static void
92ieee80211_fill_frame_info(struct ieee80211_local *local,
93 struct ieee80211_frame_info *fi,
94 struct ieee80211_rx_status *status)
95{
96 if (status) {
97 struct timespec ts;
98 struct ieee80211_rate *rate;
f0706e82 99
b2c258fb
JB		 100 jiffies_to_timespec(jiffies, &ts);
101 fi->hosttime = cpu_to_be64((u64) ts.tv_sec * 1000000 +
102 ts.tv_nsec / 1000);
103 fi->mactime = cpu_to_be64(status->mactime);
104 switch (status->phymode) {
f0706e82 105 case MODE_IEEE80211A:
b2c258fb 106 fi->phytype = htonl(ieee80211_phytype_ofdm_dot11_a);
f0706e82
JB		 107 break;
108 case MODE_IEEE80211B:
b2c258fb 109 fi->phytype = htonl(ieee80211_phytype_dsss_dot11_b);
f0706e82
JB		 110 break;
111 case MODE_IEEE80211G:
b2c258fb 112 fi->phytype = htonl(ieee80211_phytype_pbcc_dot11_g);
f0706e82 113 break;
b2c258fb
JB		 114 default:
115 fi->phytype = htonl(0xAAAAAAAA);
f0706e82
JB		 116 break;
117 }
b2c258fb
JB		 118 fi->channel = htonl(status->channel);
119 rate = ieee80211_get_rate(local, status->phymode,
120 status->rate);
121 if (rate) {
122 fi->datarate = htonl(rate->rate);
123 if (rate->flags & IEEE80211_RATE_PREAMBLE2) {
124 if (status->rate == rate->val)
125 fi->preamble = htonl(2); /* long */
126 else if (status->rate == rate->val2)
127 fi->preamble = htonl(1); /* short */
128 } else
129 fi->preamble = htonl(0);
130 } else {
131 fi->datarate = htonl(0);
132 fi->preamble = htonl(0);
133 }
134
135 fi->antenna = htonl(status->antenna);
136 fi->priority = htonl(0xffffffff); /* no clue */
137 fi->ssi_type = htonl(ieee80211_ssi_raw);
138 fi->ssi_signal = htonl(status->ssi);
139 fi->ssi_noise = 0x00000000;
140 fi->encoding = 0;
141 } else {
142 /* clear everything because we really don't know.
143 * the msg_type field isn't present on monitor frames
144 * so we don't know whether it will be present or not,
145 * but it's ok to not clear it since it'll be assigned
146 * anyway */
147 memset(fi, 0, sizeof(*fi) - sizeof(fi->msg_type));
148
149 fi->ssi_type = htonl(ieee80211_ssi_none);
150 }
151 fi->version = htonl(IEEE80211_FI_VERSION);
152 fi->length = cpu_to_be32(sizeof(*fi) - sizeof(fi->msg_type));
153}
154
155/* this routine is actually not just for this, but also
156 * for pushing fake 'management' frames into userspace.
157 * it shall be replaced by a netlink-based system. */
158void
159ieee80211_rx_mgmt(struct ieee80211_local *local, struct sk_buff *skb,
160 struct ieee80211_rx_status *status, u32 msg_type)
161{
162 struct ieee80211_frame_info *fi;
163 const size_t hlen = sizeof(struct ieee80211_frame_info);
68aae116 164 struct net_device *dev = local->apdev;
b2c258fb 165
68aae116 166 skb->dev = dev;
b2c258fb
JB		 167
168 if (skb_headroom(skb) < hlen) {
169 I802_DEBUG_INC(local->rx_expand_skb_head);
170 if (pskb_expand_head(skb, hlen, 0, GFP_ATOMIC)) {
171 dev_kfree_skb(skb);
172 return;
173 }
f0706e82 174 }
b2c258fb
JB		 175
176 fi = (struct ieee80211_frame_info *) skb_push(skb, hlen);
177
178 ieee80211_fill_frame_info(local, fi, status);
179 fi->msg_type = htonl(msg_type);
180
68aae116
SH		 181 dev->stats.rx_packets++;
182 dev->stats.rx_bytes += skb->len;
b2c258fb
JB		 183
184 skb_set_mac_header(skb, 0);
185 skb->ip_summed = CHECKSUM_UNNECESSARY;
186 skb->pkt_type = PACKET_OTHERHOST;
187 skb->protocol = htons(ETH_P_802_2);
188 memset(skb->cb, 0, sizeof(skb->cb));
189 netif_rx(skb);
f0706e82
JB		 190}
191
571ecf67
JB		 192void ieee80211_key_threshold_notify(struct net_device *dev,
193 struct ieee80211_key *key,
194 struct sta_info *sta)
f0706e82
JB		 195{
196 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
197 struct sk_buff *skb;
198 struct ieee80211_msg_key_notification *msg;
199
200 /* if no one will get it anyway, don't even allocate it.
201 * unlikely because this is only relevant for APs
202 * where the device must be open... */
203 if (unlikely(!local->apdev))
204 return;
205
206 skb = dev_alloc_skb(sizeof(struct ieee80211_frame_info) +
207 sizeof(struct ieee80211_msg_key_notification));
208 if (!skb)
209 return;
210
211 skb_reserve(skb, sizeof(struct ieee80211_frame_info));
212 msg = (struct ieee80211_msg_key_notification *)
213 skb_put(skb, sizeof(struct ieee80211_msg_key_notification));
214 msg->tx_rx_count = key->tx_rx_count;
215 memcpy(msg->ifname, dev->name, IFNAMSIZ);
216 if (sta)
217 memcpy(msg->addr, sta->addr, ETH_ALEN);
218 else
219 memset(msg->addr, 0xff, ETH_ALEN);
220
221 key->tx_rx_count = 0;
222
223 ieee80211_rx_mgmt(local, skb, NULL,
224 ieee80211_msg_key_threshold_notification);
225}
226
b2c258fb 227static int ieee80211_mgmt_open(struct net_device *dev)
f0706e82 228{
b2c258fb 229 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
f0706e82 230
b2c258fb
JB		 231 if (!netif_running(local->mdev))
232 return -EOPNOTSUPP;
233 return 0;
e2ebc74d 234}
f0706e82 235
b2c258fb 236static int ieee80211_mgmt_stop(struct net_device *dev)
e2ebc74d 237{
b2c258fb
JB		 238 return 0;
239}
f0706e82 240
b2c258fb
JB		 241static int ieee80211_change_mtu_apdev(struct net_device *dev, int new_mtu)
242{
243 /* FIX: what would be proper limits for MTU?
244 * This interface uses 802.11 frames. */
245 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN) {
246 printk(KERN_WARNING "%s: invalid MTU %d\n",
247 dev->name, new_mtu);
248 return -EINVAL;
f0706e82 249 }
f0706e82 250
b2c258fb
JB		 251#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
252 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
253#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
254 dev->mtu = new_mtu;
255 return 0;
e2ebc74d 256}
f0706e82 257
b2c258fb 258void ieee80211_if_mgmt_setup(struct net_device *dev)
e2ebc74d 259{
b2c258fb
JB		 260 ether_setup(dev);
261 dev->hard_start_xmit = ieee80211_mgmt_start_xmit;
262 dev->change_mtu = ieee80211_change_mtu_apdev;
b2c258fb
JB		 263 dev->open = ieee80211_mgmt_open;
264 dev->stop = ieee80211_mgmt_stop;
265 dev->type = ARPHRD_IEEE80211_PRISM;
266 dev->hard_header_parse = header_parse_80211;
267 dev->uninit = ieee80211_if_reinit;
268 dev->destructor = ieee80211_if_free;
f0706e82
JB		 269}
270
b2c258fb 271/* regular interfaces */
f0706e82 272
b2c258fb 273static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
f0706e82 274{
b2c258fb
JB		 275 /* FIX: what would be proper limits for MTU?
276 * This interface uses 802.3 frames. */
277 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6) {
278 printk(KERN_WARNING "%s: invalid MTU %d\n",
279 dev->name, new_mtu);
280 return -EINVAL;
281 }
f0706e82 282
b2c258fb
JB		 283#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
284 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
285#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
286 dev->mtu = new_mtu;
f0706e82
JB		 287 return 0;
288}
289
b2c258fb
JB		 290static inline int identical_mac_addr_allowed(int type1, int type2)
291{
292 return (type1 == IEEE80211_IF_TYPE_MNTR ||
293 type2 == IEEE80211_IF_TYPE_MNTR ||
294 (type1 == IEEE80211_IF_TYPE_AP &&
295 type2 == IEEE80211_IF_TYPE_WDS) ||
296 (type1 == IEEE80211_IF_TYPE_WDS &&
297 (type2 == IEEE80211_IF_TYPE_WDS ||
298 type2 == IEEE80211_IF_TYPE_AP)) ||
299 (type1 == IEEE80211_IF_TYPE_AP &&
300 type2 == IEEE80211_IF_TYPE_VLAN) ||
301 (type1 == IEEE80211_IF_TYPE_VLAN &&
302 (type2 == IEEE80211_IF_TYPE_AP ||
303 type2 == IEEE80211_IF_TYPE_VLAN)));
304}
f0706e82 305
b2c258fb
JB		 306/* Check if running monitor interfaces should go to a "soft monitor" mode
307 * and switch them if necessary. */
308static inline void ieee80211_start_soft_monitor(struct ieee80211_local *local)
f0706e82 309{
b2c258fb 310 struct ieee80211_if_init_conf conf;
f0706e82 311
b2c258fb
JB		 312 if (local->open_count && local->open_count == local->monitors &&
313 !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER) &&
314 local->ops->remove_interface) {
315 conf.if_id = -1;
316 conf.type = IEEE80211_IF_TYPE_MNTR;
317 conf.mac_addr = NULL;
318 local->ops->remove_interface(local_to_hw(local), &conf);
f0706e82 319 }
f0706e82
JB		 320}
321
b2c258fb
JB		 322/* Check if running monitor interfaces should go to a "hard monitor" mode
323 * and switch them if necessary. */
324static void ieee80211_start_hard_monitor(struct ieee80211_local *local)
f0706e82 325{
b2c258fb 326 struct ieee80211_if_init_conf conf;
f0706e82 327
b2c258fb
JB		 328 if (local->open_count && local->open_count == local->monitors &&
329 !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
330 conf.if_id = -1;
331 conf.type = IEEE80211_IF_TYPE_MNTR;
332 conf.mac_addr = NULL;
333 local->ops->add_interface(local_to_hw(local), &conf);
f0706e82 334 }
e2ebc74d 335}
f0706e82 336
8a69aa93
DD		 337static void ieee80211_if_open(struct net_device *dev)
338{
339 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
340
341 switch (sdata->type) {
342 case IEEE80211_IF_TYPE_STA:
343 case IEEE80211_IF_TYPE_IBSS:
d6f2da5b 344 sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET;
8a69aa93
DD		 345 break;
346 }
347}
348
b2c258fb 349static int ieee80211_open(struct net_device *dev)
e2ebc74d 350{
b2c258fb
JB		 351 struct ieee80211_sub_if_data *sdata, *nsdata;
352 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
353 struct ieee80211_if_init_conf conf;
354 int res;
f0706e82 355
b2c258fb
JB		 356 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
357 read_lock(&local->sub_if_lock);
358 list_for_each_entry(nsdata, &local->sub_if_list, list) {
359 struct net_device *ndev = nsdata->dev;
e2ebc74d 360
b2c258fb
JB		 361 if (ndev != dev && ndev != local->mdev && netif_running(ndev) &&
362 compare_ether_addr(dev->dev_addr, ndev->dev_addr) == 0 &&
363 !identical_mac_addr_allowed(sdata->type, nsdata->type)) {
364 read_unlock(&local->sub_if_lock);
365 return -ENOTUNIQ;
366 }
367 }
368 read_unlock(&local->sub_if_lock);
f0706e82 369
b2c258fb
JB		 370 if (sdata->type == IEEE80211_IF_TYPE_WDS &&
371 is_zero_ether_addr(sdata->u.wds.remote_addr))
372 return -ENOLINK;
f0706e82 373
b2c258fb
JB		 374 if (sdata->type == IEEE80211_IF_TYPE_MNTR && local->open_count &&
375 !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
376 /* run the interface in a "soft monitor" mode */
377 local->monitors++;
378 local->open_count++;
379 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
380 return 0;
381 }
8a69aa93 382 ieee80211_if_open(dev);
b2c258fb 383 ieee80211_start_soft_monitor(local);
f0706e82 384
b2c258fb
JB		 385 conf.if_id = dev->ifindex;
386 conf.type = sdata->type;
1bec3f1a
JB		 387 if (sdata->type == IEEE80211_IF_TYPE_MNTR)
388 conf.mac_addr = NULL;
389 else
390 conf.mac_addr = dev->dev_addr;
b2c258fb
JB		 391 res = local->ops->add_interface(local_to_hw(local), &conf);
392 if (res) {
393 if (sdata->type == IEEE80211_IF_TYPE_MNTR)
394 ieee80211_start_hard_monitor(local);
395 return res;
396 }
f0706e82 397
b2c258fb
JB		 398 if (local->open_count == 0) {
399 res = 0;
400 tasklet_enable(&local->tx_pending_tasklet);
401 tasklet_enable(&local->tasklet);
402 if (local->ops->open)
403 res = local->ops->open(local_to_hw(local));
404 if (res == 0) {
405 res = dev_open(local->mdev);
406 if (res) {
407 if (local->ops->stop)
408 local->ops->stop(local_to_hw(local));
409 } else {
410 res = ieee80211_hw_config(local);
411 if (res && local->ops->stop)
412 local->ops->stop(local_to_hw(local));
413 else if (!res && local->apdev)
414 dev_open(local->apdev);
415 }
416 }
417 if (res) {
418 if (local->ops->remove_interface)
419 local->ops->remove_interface(local_to_hw(local),
420 &conf);
421 return res;
422 }
423 }
424 local->open_count++;
f0706e82 425
b2c258fb
JB		 426 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
427 local->monitors++;
428 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
d9430a32 429 } else {
b2c258fb 430 ieee80211_if_config(dev);
d9430a32 431 ieee80211_reset_erp_info(dev);
11a843b7 432 ieee80211_enable_keys(sdata);
d9430a32 433 }
f0706e82 434
b2c258fb
JB		 435 if (sdata->type == IEEE80211_IF_TYPE_STA &&
436 !local->user_space_mlme)
437 netif_carrier_off(dev);
438 else
439 netif_carrier_on(dev);
f0706e82 440
b2c258fb
JB		 441 netif_start_queue(dev);
442 return 0;
f0706e82 443}
f0706e82 444
b2c258fb 445static void ieee80211_if_shutdown(struct net_device *dev)
f0706e82 446{
f0706e82 447 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
b2c258fb 448 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
f0706e82 449
b2c258fb
JB		 450 ASSERT_RTNL();
451 switch (sdata->type) {
452 case IEEE80211_IF_TYPE_STA:
453 case IEEE80211_IF_TYPE_IBSS:
454 sdata->u.sta.state = IEEE80211_DISABLED;
455 del_timer_sync(&sdata->u.sta.timer);
2a8a9a88
JB		 456 /*
457 * Holding the sub_if_lock for writing here blocks
458 * out the receive path and makes sure it's not
459 * currently processing a packet that may get
460 * added to the queue.
461 */
462 write_lock_bh(&local->sub_if_lock);
b2c258fb 463 skb_queue_purge(&sdata->u.sta.skb_queue);
2a8a9a88
JB		 464 write_unlock_bh(&local->sub_if_lock);
465
b2c258fb
JB		 466 if (!local->ops->hw_scan &&
467 local->scan_dev == sdata->dev) {
468 local->sta_scanning = 0;
469 cancel_delayed_work(&local->scan_work);
470 }
471 flush_workqueue(local->hw.workqueue);
472 break;
f0706e82 473 }
f0706e82
JB		 474}
475
b2c258fb 476static int ieee80211_stop(struct net_device *dev)
f0706e82 477{
b2c258fb 478 struct ieee80211_sub_if_data *sdata;
f0706e82 479 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
f0706e82 480
b2c258fb 481 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
f0706e82 482
b2c258fb
JB		 483 if (sdata->type == IEEE80211_IF_TYPE_MNTR &&
484 local->open_count > 1 &&
485 !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
486 /* remove "soft monitor" interface */
487 local->open_count--;
488 local->monitors--;
489 if (!local->monitors)
490 local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
491 return 0;
f0706e82
JB		 492 }
493
b2c258fb
JB		 494 netif_stop_queue(dev);
495 ieee80211_if_shutdown(dev);
f0706e82 496
b2c258fb
JB		 497 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
498 local->monitors--;
499 if (!local->monitors)
500 local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
11a843b7
JB		 501 } else {
502 /* disable all keys for as long as this netdev is down */
503 ieee80211_disable_keys(sdata);
f0706e82
JB		 504 }
505
b2c258fb
JB		 506 local->open_count--;
507 if (local->open_count == 0) {
508 if (netif_running(local->mdev))
509 dev_close(local->mdev);
510 if (local->apdev)
511 dev_close(local->apdev);
512 if (local->ops->stop)
513 local->ops->stop(local_to_hw(local));
514 tasklet_disable(&local->tx_pending_tasklet);
515 tasklet_disable(&local->tasklet);
516 }
517 if (local->ops->remove_interface) {
518 struct ieee80211_if_init_conf conf;
f0706e82 519
b2c258fb
JB		 520 conf.if_id = dev->ifindex;
521 conf.type = sdata->type;
522 conf.mac_addr = dev->dev_addr;
523 local->ops->remove_interface(local_to_hw(local), &conf);
f0706e82
JB		 524 }
525
b2c258fb
JB		 526 ieee80211_start_hard_monitor(local);
527
f0706e82
JB		 528 return 0;
529}
530
531enum netif_tx_lock_class {
532 TX_LOCK_NORMAL,
533 TX_LOCK_MASTER,
534};
535
536static inline void netif_tx_lock_nested(struct net_device *dev, int subclass)
537{
538 spin_lock_nested(&dev->_xmit_lock, subclass);
539 dev->xmit_lock_owner = smp_processor_id();
540}
541
542static void ieee80211_set_multicast_list(struct net_device *dev)
543{
544 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
545 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
546 unsigned short flags;
547
548 netif_tx_lock_nested(local->mdev, TX_LOCK_MASTER);
13262ffd
JS		 549 if (((dev->flags & IFF_ALLMULTI) != 0) ^
550 ((sdata->flags & IEEE80211_SDATA_ALLMULTI) != 0)) {
551 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
f0706e82 552 local->iff_allmultis--;
13262ffd 553 else
f0706e82 554 local->iff_allmultis++;
13262ffd 555 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
f0706e82 556 }
13262ffd
JS		 557 if (((dev->flags & IFF_PROMISC) != 0) ^
558 ((sdata->flags & IEEE80211_SDATA_PROMISC) != 0)) {
559 if (sdata->flags & IEEE80211_SDATA_PROMISC)
f0706e82 560 local->iff_promiscs--;
13262ffd 561 else
f0706e82 562 local->iff_promiscs++;
13262ffd 563 sdata->flags ^= IEEE80211_SDATA_PROMISC;
f0706e82
JB		 564 }
565 if (dev->mc_count != sdata->mc_count) {
566 local->mc_count = local->mc_count - sdata->mc_count +
567 dev->mc_count;
568 sdata->mc_count = dev->mc_count;
569 }
570 if (local->ops->set_multicast_list) {
571 flags = local->mdev->flags;
572 if (local->iff_allmultis)
573 flags |= IFF_ALLMULTI;
574 if (local->iff_promiscs)
575 flags |= IFF_PROMISC;
576 read_lock(&local->sub_if_lock);
577 local->ops->set_multicast_list(local_to_hw(local), flags,
578 local->mc_count);
579 read_unlock(&local->sub_if_lock);
580 }
581 netif_tx_unlock(local->mdev);
582}
583
b2c258fb
JB		 584/* Must not be called for mdev and apdev */
585void ieee80211_if_setup(struct net_device *dev)
f0706e82 586{
b2c258fb
JB		 587 ether_setup(dev);
588 dev->hard_start_xmit = ieee80211_subif_start_xmit;
589 dev->wireless_handlers = &ieee80211_iw_handler_def;
590 dev->set_multicast_list = ieee80211_set_multicast_list;
591 dev->change_mtu = ieee80211_change_mtu;
b2c258fb
JB		 592 dev->open = ieee80211_open;
593 dev->stop = ieee80211_stop;
594 dev->uninit = ieee80211_if_reinit;
595 dev->destructor = ieee80211_if_free;
596}
f0706e82 597
b2c258fb
JB		 598/* WDS specialties */
599
600int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr)
601{
602 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
603 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
604 struct sta_info *sta;
0795af57 605 DECLARE_MAC_BUF(mac);
b2c258fb
JB		 606
607 if (compare_ether_addr(remote_addr, sdata->u.wds.remote_addr) == 0)
608 return 0;
609
610 /* Create STA entry for the new peer */
611 sta = sta_info_add(local, dev, remote_addr, GFP_KERNEL);
612 if (!sta)
613 return -ENOMEM;
614 sta_info_put(sta);
615
616 /* Remove STA entry for the old peer */
617 sta = sta_info_get(local, sdata->u.wds.remote_addr);
618 if (sta) {
be8755e1 619 sta_info_free(sta);
b2c258fb 620 sta_info_put(sta);
b2c258fb
JB		 621 } else {
622 printk(KERN_DEBUG "%s: could not find STA entry for WDS link "
0795af57
JP		 623 "peer %s\n",
624 dev->name, print_mac(mac, sdata->u.wds.remote_addr));
b2c258fb
JB		 625 }
626
627 /* Update WDS link data */
628 memcpy(&sdata->u.wds.remote_addr, remote_addr, ETH_ALEN);
629
630 return 0;
f0706e82 631}
f0706e82 632
b2c258fb
JB		 633/* everything else */
634
b2c258fb
JB		 635static int __ieee80211_if_config(struct net_device *dev,
636 struct sk_buff *beacon,
637 struct ieee80211_tx_control *control)
638{
639 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
640 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
641 struct ieee80211_if_conf conf;
642 static u8 scan_bssid[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
643
644 if (!local->ops->config_interface || !netif_running(dev))
f0706e82 645 return 0;
f0706e82 646
b2c258fb 647 memset(&conf, 0, sizeof(conf));
4480f15c 648 conf.type = sdata->type;
b2c258fb
JB		 649 if (sdata->type == IEEE80211_IF_TYPE_STA ||
650 sdata->type == IEEE80211_IF_TYPE_IBSS) {
651 if (local->sta_scanning &&
652 local->scan_dev == dev)
653 conf.bssid = scan_bssid;
654 else
655 conf.bssid = sdata->u.sta.bssid;
656 conf.ssid = sdata->u.sta.ssid;
657 conf.ssid_len = sdata->u.sta.ssid_len;
658 conf.generic_elem = sdata->u.sta.extra_ie;
659 conf.generic_elem_len = sdata->u.sta.extra_ie_len;
660 } else if (sdata->type == IEEE80211_IF_TYPE_AP) {
661 conf.ssid = sdata->u.ap.ssid;
662 conf.ssid_len = sdata->u.ap.ssid_len;
663 conf.generic_elem = sdata->u.ap.generic_elem;
664 conf.generic_elem_len = sdata->u.ap.generic_elem_len;
665 conf.beacon = beacon;
666 conf.beacon_control = control;
f0706e82 667 }
b2c258fb
JB		 668 return local->ops->config_interface(local_to_hw(local),
669 dev->ifindex, &conf);
f0706e82
JB		 670}
671
b2c258fb
JB		 672int ieee80211_if_config(struct net_device *dev)
673{
674 return __ieee80211_if_config(dev, NULL, NULL);
675}
f0706e82 676
b2c258fb 677int ieee80211_if_config_beacon(struct net_device *dev)
f0706e82 678{
f0706e82 679 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
b2c258fb
JB		 680 struct ieee80211_tx_control control;
681 struct sk_buff *skb;
f0706e82 682
b2c258fb 683 if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
f0706e82 684 return 0;
b2c258fb
JB		 685 skb = ieee80211_beacon_get(local_to_hw(local), dev->ifindex, &control);
686 if (!skb)
687 return -ENOMEM;
688 return __ieee80211_if_config(dev, skb, &control);
689}
f0706e82 690
b2c258fb
JB		 691int ieee80211_hw_config(struct ieee80211_local *local)
692{
693 struct ieee80211_hw_mode *mode;
694 struct ieee80211_channel *chan;
695 int ret = 0;
f0706e82 696
b2c258fb
JB		 697 if (local->sta_scanning) {
698 chan = local->scan_channel;
699 mode = local->scan_hw_mode;
700 } else {
701 chan = local->oper_channel;
702 mode = local->oper_hw_mode;
f0706e82
JB		 703 }
704
b2c258fb
JB		 705 local->hw.conf.channel = chan->chan;
706 local->hw.conf.channel_val = chan->val;
707 local->hw.conf.power_level = chan->power_level;
708 local->hw.conf.freq = chan->freq;
709 local->hw.conf.phymode = mode->mode;
710 local->hw.conf.antenna_max = chan->antenna_max;
711 local->hw.conf.chan = chan;
712 local->hw.conf.mode = mode;
f0706e82 713
b2c258fb
JB		 714#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
715 printk(KERN_DEBUG "HW CONFIG: channel=%d freq=%d "
716 "phymode=%d\n", local->hw.conf.channel, local->hw.conf.freq,
717 local->hw.conf.phymode);
718#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
719
720 if (local->ops->config)
721 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
f0706e82 722
b2c258fb
JB		 723 return ret;
724}
f0706e82 725
d9430a32
DD		 726void ieee80211_erp_info_change_notify(struct net_device *dev, u8 changes)
727{
728 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
729 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
730 if (local->ops->erp_ie_changed)
731 local->ops->erp_ie_changed(local_to_hw(local), changes,
13262ffd
JS		 732 !!(sdata->flags & IEEE80211_SDATA_USE_PROTECTION),
733 !(sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE));
d9430a32
DD		 734}
735
736void ieee80211_reset_erp_info(struct net_device *dev)
737{
738 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
739
13262ffd
JS		 740 sdata->flags &= ~(IEEE80211_SDATA_USE_PROTECTION |
741 IEEE80211_SDATA_SHORT_PREAMBLE);
d9430a32
DD		 742 ieee80211_erp_info_change_notify(dev,
743 IEEE80211_ERP_CHANGE_PROTECTION |
744 IEEE80211_ERP_CHANGE_PREAMBLE);
745}
746
b2c258fb
JB		 747struct dev_mc_list *ieee80211_get_mc_list_item(struct ieee80211_hw *hw,
748 struct dev_mc_list *prev,
749 void **ptr)
f0706e82 750{
b2c258fb
JB		 751 struct ieee80211_local *local = hw_to_local(hw);
752 struct ieee80211_sub_if_data *sdata = *ptr;
753 struct dev_mc_list *mc;
754
755 if (!prev) {
756 WARN_ON(sdata);
757 sdata = NULL;
758 }
759 if (!prev || !prev->next) {
760 if (sdata)
761 sdata = list_entry(sdata->list.next,
762 struct ieee80211_sub_if_data, list);
763 else
764 sdata = list_entry(local->sub_if_list.next,
765 struct ieee80211_sub_if_data, list);
766 if (&sdata->list != &local->sub_if_list)
767 mc = sdata->dev->mc_list;
768 else
769 mc = NULL;
770 } else
771 mc = prev->next;
772
773 *ptr = sdata;
774 return mc;
f0706e82 775}
b2c258fb 776EXPORT_SYMBOL(ieee80211_get_mc_list_item);
f0706e82 777
f0706e82
JB		 778void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
779 struct sk_buff *skb,
780 struct ieee80211_tx_status *status)
781{
782 struct ieee80211_local *local = hw_to_local(hw);
783 struct ieee80211_tx_status *saved;
784 int tmp;
785
786 skb->dev = local->mdev;
787 saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC);
788 if (unlikely(!saved)) {
789 if (net_ratelimit())
790 printk(KERN_WARNING "%s: Not enough memory, "
791 "dropping tx status", skb->dev->name);
792 /* should be dev_kfree_skb_irq, but due to this function being
793 * named _irqsafe instead of just _irq we can't be sure that
794 * people won't call it from non-irq contexts */
795 dev_kfree_skb_any(skb);
796 return;
797 }
798 memcpy(saved, status, sizeof(struct ieee80211_tx_status));
799 /* copy pointer to saved status into skb->cb for use by tasklet */
800 memcpy(skb->cb, &saved, sizeof(saved));
801
802 skb->pkt_type = IEEE80211_TX_STATUS_MSG;
803 skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ?
804 &local->skb_queue : &local->skb_queue_unreliable, skb);
805 tmp = skb_queue_len(&local->skb_queue) +
806 skb_queue_len(&local->skb_queue_unreliable);
807 while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
808 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
809 memcpy(&saved, skb->cb, sizeof(saved));
810 kfree(saved);
811 dev_kfree_skb_irq(skb);
812 tmp--;
813 I802_DEBUG_INC(local->tx_status_drop);
814 }
815 tasklet_schedule(&local->tasklet);
816}
817EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
818
819static void ieee80211_tasklet_handler(unsigned long data)
820{
821 struct ieee80211_local *local = (struct ieee80211_local *) data;
822 struct sk_buff *skb;
823 struct ieee80211_rx_status rx_status;
824 struct ieee80211_tx_status *tx_status;
825
826 while ((skb = skb_dequeue(&local->skb_queue)) ||
827 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
828 switch (skb->pkt_type) {
829 case IEEE80211_RX_MSG:
830 /* status is in skb->cb */
831 memcpy(&rx_status, skb->cb, sizeof(rx_status));
832 /* Clear skb->type in order to not confuse kernel
833 * netstack. */
834 skb->pkt_type = 0;
835 __ieee80211_rx(local_to_hw(local), skb, &rx_status);
836 break;
837 case IEEE80211_TX_STATUS_MSG:
838 /* get pointer to saved status out of skb->cb */
839 memcpy(&tx_status, skb->cb, sizeof(tx_status));
840 skb->pkt_type = 0;
841 ieee80211_tx_status(local_to_hw(local),
842 skb, tx_status);
843 kfree(tx_status);
844 break;
845 default: /* should never get here! */
846 printk(KERN_ERR "%s: Unknown message type (%d)\n",
847 local->mdev->name, skb->pkt_type);
848 dev_kfree_skb(skb);
849 break;
850 }
851 }
852}
853
f0706e82
JB		 854/* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
855 * make a prepared TX frame (one that has been given to hw) to look like brand
856 * new IEEE 802.11 frame that is ready to go through TX processing again.
857 * Also, tx_packet_data in cb is restored from tx_control. */
858static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
859 struct ieee80211_key *key,
860 struct sk_buff *skb,
861 struct ieee80211_tx_control *control)
862{
863 int hdrlen, iv_len, mic_len;
864 struct ieee80211_tx_packet_data *pkt_data;
865
866 pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
867 pkt_data->ifindex = control->ifindex;
e8bf9649
JS		 868 pkt_data->flags = 0;
869 if (control->flags & IEEE80211_TXCTL_REQ_TX_STATUS)
870 pkt_data->flags |= IEEE80211_TXPD_REQ_TX_STATUS;
871 if (control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT)
872 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
873 if (control->flags & IEEE80211_TXCTL_REQUEUE)
874 pkt_data->flags |= IEEE80211_TXPD_REQUEUE;
875 if (control->type == IEEE80211_IF_TYPE_MGMT)
876 pkt_data->flags |= IEEE80211_TXPD_MGMT_IFACE;
f0706e82
JB		 877 pkt_data->queue = control->queue;
878
879 hdrlen = ieee80211_get_hdrlen_from_skb(skb);
880
881 if (!key)
882 goto no_key;
883
8f20fc24 884 switch (key->conf.alg) {
f0706e82
JB		 885 case ALG_WEP:
886 iv_len = WEP_IV_LEN;
887 mic_len = WEP_ICV_LEN;
888 break;
889 case ALG_TKIP:
890 iv_len = TKIP_IV_LEN;
891 mic_len = TKIP_ICV_LEN;
892 break;
893 case ALG_CCMP:
894 iv_len = CCMP_HDR_LEN;
895 mic_len = CCMP_MIC_LEN;
896 break;
897 default:
898 goto no_key;
899 }
900
8f20fc24 901 if (skb->len >= mic_len &&
11a843b7 902 !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
f0706e82
JB		 903 skb_trim(skb, skb->len - mic_len);
904 if (skb->len >= iv_len && skb->len > hdrlen) {
905 memmove(skb->data + iv_len, skb->data, hdrlen);
906 skb_pull(skb, iv_len);
907 }
908
909no_key:
910 {
911 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
912 u16 fc = le16_to_cpu(hdr->frame_control);
913 if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
914 fc &= ~IEEE80211_STYPE_QOS_DATA;
915 hdr->frame_control = cpu_to_le16(fc);
916 memmove(skb->data + 2, skb->data, hdrlen - 2);
917 skb_pull(skb, 2);
918 }
919 }
920}
921
f0706e82
JB		 922void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
923 struct ieee80211_tx_status *status)
924{
925 struct sk_buff *skb2;
926 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
927 struct ieee80211_local *local = hw_to_local(hw);
928 u16 frag, type;
929 u32 msg_type;
b306f453
JB		 930 struct ieee80211_tx_status_rtap_hdr *rthdr;
931 struct ieee80211_sub_if_data *sdata;
932 int monitors;
f0706e82
JB		 933
934 if (!status) {
935 printk(KERN_ERR
936 "%s: ieee80211_tx_status called with NULL status\n",
937 local->mdev->name);
938 dev_kfree_skb(skb);
939 return;
940 }
941
942 if (status->excessive_retries) {
943 struct sta_info *sta;
944 sta = sta_info_get(local, hdr->addr1);
945 if (sta) {
946 if (sta->flags & WLAN_STA_PS) {
947 /* The STA is in power save mode, so assume
948 * that this TX packet failed because of that.
949 */
950 status->excessive_retries = 0;
951 status->flags |= IEEE80211_TX_STATUS_TX_FILTERED;
952 }
953 sta_info_put(sta);
954 }
955 }
956
957 if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) {
958 struct sta_info *sta;
959 sta = sta_info_get(local, hdr->addr1);
960 if (sta) {
961 sta->tx_filtered_count++;
962
963 /* Clear the TX filter mask for this STA when sending
964 * the next packet. If the STA went to power save mode,
965 * this will happen when it is waking up for the next
966 * time. */
967 sta->clear_dst_mask = 1;
968
969 /* TODO: Is the WLAN_STA_PS flag always set here or is
970 * the race between RX and TX status causing some
971 * packets to be filtered out before 80211.o gets an
972 * update for PS status? This seems to be the case, so
973 * no changes are likely to be needed. */
974 if (sta->flags & WLAN_STA_PS &&
975 skb_queue_len(&sta->tx_filtered) <
976 STA_MAX_TX_BUFFER) {
977 ieee80211_remove_tx_extra(local, sta->key,
978 skb,
979 &status->control);
980 skb_queue_tail(&sta->tx_filtered, skb);
981 } else if (!(sta->flags & WLAN_STA_PS) &&
982 !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) {
983 /* Software retry the packet once */
984 status->control.flags |= IEEE80211_TXCTL_REQUEUE;
985 ieee80211_remove_tx_extra(local, sta->key,
986 skb,
987 &status->control);
988 dev_queue_xmit(skb);
989 } else {
990 if (net_ratelimit()) {
991 printk(KERN_DEBUG "%s: dropped TX "
992 "filtered frame queue_len=%d "
993 "PS=%d @%lu\n",
994 local->mdev->name,
995 skb_queue_len(
996 &sta->tx_filtered),
997 !!(sta->flags & WLAN_STA_PS),
998 jiffies);
999 }
1000 dev_kfree_skb(skb);
1001 }
1002 sta_info_put(sta);
1003 return;
1004 }
1005 } else {
1006 /* FIXME: STUPID to call this with both local and local->mdev */
1007 rate_control_tx_status(local, local->mdev, skb, status);
1008 }
1009
1010 ieee80211_led_tx(local, 0);
1011
1012 /* SNMP counters
1013 * Fragments are passed to low-level drivers as separate skbs, so these
1014 * are actually fragments, not frames. Update frame counters only for
1015 * the first fragment of the frame. */
1016
1017 frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
1018 type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
1019
1020 if (status->flags & IEEE80211_TX_STATUS_ACK) {
1021 if (frag == 0) {
1022 local->dot11TransmittedFrameCount++;
1023 if (is_multicast_ether_addr(hdr->addr1))
1024 local->dot11MulticastTransmittedFrameCount++;
1025 if (status->retry_count > 0)
1026 local->dot11RetryCount++;
1027 if (status->retry_count > 1)
1028 local->dot11MultipleRetryCount++;
1029 }
1030
1031 /* This counter shall be incremented for an acknowledged MPDU
1032 * with an individual address in the address 1 field or an MPDU
1033 * with a multicast address in the address 1 field of type Data
1034 * or Management. */
1035 if (!is_multicast_ether_addr(hdr->addr1) ||
1036 type == IEEE80211_FTYPE_DATA ||
1037 type == IEEE80211_FTYPE_MGMT)
1038 local->dot11TransmittedFragmentCount++;
1039 } else {
1040 if (frag == 0)
1041 local->dot11FailedCount++;
1042 }
1043
b306f453
JB		 1044 msg_type = (status->flags & IEEE80211_TX_STATUS_ACK) ?
1045 ieee80211_msg_tx_callback_ack : ieee80211_msg_tx_callback_fail;
1046
1047 /* this was a transmitted frame, but now we want to reuse it */
1048 skb_orphan(skb);
1049
1050 if ((status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS) &&
1051 local->apdev) {
1052 if (local->monitors) {
1053 skb2 = skb_clone(skb, GFP_ATOMIC);
1054 } else {
1055 skb2 = skb;
1056 skb = NULL;
1057 }
1058
1059 if (skb2)
1060 /* Send frame to hostapd */
1061 ieee80211_rx_mgmt(local, skb2, NULL, msg_type);
1062
1063 if (!skb)
1064 return;
1065 }
1066
1067 if (!local->monitors) {
f0706e82
JB		 1068 dev_kfree_skb(skb);
1069 return;
1070 }
1071
b306f453 1072 /* send frame to monitor interfaces now */
f0706e82 1073
b306f453
JB		 1074 if (skb_headroom(skb) < sizeof(*rthdr)) {
1075 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
f0706e82
JB		 1076 dev_kfree_skb(skb);
1077 return;
1078 }
f0706e82 1079
b306f453
JB		 1080 rthdr = (struct ieee80211_tx_status_rtap_hdr*)
1081 skb_push(skb, sizeof(*rthdr));
1082
1083 memset(rthdr, 0, sizeof(*rthdr));
1084 rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
1085 rthdr->hdr.it_present =
1086 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
1087 (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
1088
1089 if (!(status->flags & IEEE80211_TX_STATUS_ACK) &&
1090 !is_multicast_ether_addr(hdr->addr1))
1091 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
1092
1093 if ((status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) &&
1094 (status->control.flags & IEEE80211_TXCTL_USE_CTS_PROTECT))
1095 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
1096 else if (status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS)
1097 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
1098
1099 rthdr->data_retries = status->retry_count;
1100
1101 read_lock(&local->sub_if_lock);
1102 monitors = local->monitors;
1103 list_for_each_entry(sdata, &local->sub_if_list, list) {
1104 /*
1105 * Using the monitors counter is possibly racy, but
1106 * if the value is wrong we simply either clone the skb
1107 * once too much or forget sending it to one monitor iface
1108 * The latter case isn't nice but fixing the race is much
1109 * more complicated.
1110 */
1111 if (!monitors || !skb)
1112 goto out;
1113
1114 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
1115 if (!netif_running(sdata->dev))
1116 continue;
1117 monitors--;
1118 if (monitors)
1119 skb2 = skb_clone(skb, GFP_KERNEL);
1120 else
1121 skb2 = NULL;
1122 skb->dev = sdata->dev;
1123 /* XXX: is this sufficient for BPF? */
1124 skb_set_mac_header(skb, 0);
1125 skb->ip_summed = CHECKSUM_UNNECESSARY;
1126 skb->pkt_type = PACKET_OTHERHOST;
1127 skb->protocol = htons(ETH_P_802_2);
1128 memset(skb->cb, 0, sizeof(skb->cb));
1129 netif_rx(skb);
1130 skb = skb2;
b306f453
JB		 1131 }
1132 }
1133 out:
1134 read_unlock(&local->sub_if_lock);
1135 if (skb)
1136 dev_kfree_skb(skb);
f0706e82
JB		 1137}
1138EXPORT_SYMBOL(ieee80211_tx_status);
1139
f0706e82
JB		 1140struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
1141 const struct ieee80211_ops *ops)
1142{
1143 struct net_device *mdev;
1144 struct ieee80211_local *local;
1145 struct ieee80211_sub_if_data *sdata;
1146 int priv_size;
1147 struct wiphy *wiphy;
1148
1149 /* Ensure 32-byte alignment of our private data and hw private data.
1150 * We use the wiphy priv data for both our ieee80211_local and for
1151 * the driver's private data
1152 *
1153 * In memory it'll be like this:
1154 *
1155 * +-------------------------+
1156 * | struct wiphy |
1157 * +-------------------------+
1158 * | struct ieee80211_local |
1159 * +-------------------------+
1160 * | driver's private data |
1161 * +-------------------------+
1162 *
1163 */
1164 priv_size = ((sizeof(struct ieee80211_local) +
1165 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
1166 priv_data_len;
1167
1168 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
1169
1170 if (!wiphy)
1171 return NULL;
1172
1173 wiphy->privid = mac80211_wiphy_privid;
1174
1175 local = wiphy_priv(wiphy);
1176 local->hw.wiphy = wiphy;
1177
1178 local->hw.priv = (char *)local +
1179 ((sizeof(struct ieee80211_local) +
1180 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
1181
4480f15c
JB		 1182 BUG_ON(!ops->tx);
1183 BUG_ON(!ops->config);
1184 BUG_ON(!ops->add_interface);
f0706e82
JB		 1185 local->ops = ops;
1186
1187 /* for now, mdev needs sub_if_data :/ */
1188 mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
1189 "wmaster%d", ether_setup);
1190 if (!mdev) {
1191 wiphy_free(wiphy);
1192 return NULL;
1193 }
1194
1195 sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
1196 mdev->ieee80211_ptr = &sdata->wdev;
1197 sdata->wdev.wiphy = wiphy;
1198
1199 local->hw.queues = 1; /* default */
1200
1201 local->mdev = mdev;
1202 local->rx_pre_handlers = ieee80211_rx_pre_handlers;
1203 local->rx_handlers = ieee80211_rx_handlers;
1204 local->tx_handlers = ieee80211_tx_handlers;
1205
1206 local->bridge_packets = 1;
1207
1208 local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1209 local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1210 local->short_retry_limit = 7;
1211 local->long_retry_limit = 4;
1212 local->hw.conf.radio_enabled = 1;
f0706e82 1213
b708e610 1214 local->enabled_modes = ~0;
f0706e82
JB		 1215
1216 INIT_LIST_HEAD(&local->modes_list);
1217
1218 rwlock_init(&local->sub_if_lock);
1219 INIT_LIST_HEAD(&local->sub_if_list);
1220
1221 INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
f0706e82
JB		 1222 ieee80211_rx_bss_list_init(mdev);
1223
1224 sta_info_init(local);
1225
1226 mdev->hard_start_xmit = ieee80211_master_start_xmit;
1227 mdev->open = ieee80211_master_open;
1228 mdev->stop = ieee80211_master_stop;
1229 mdev->type = ARPHRD_IEEE80211;
1230 mdev->hard_header_parse = header_parse_80211;
1231
1232 sdata->type = IEEE80211_IF_TYPE_AP;
1233 sdata->dev = mdev;
1234 sdata->local = local;
1235 sdata->u.ap.force_unicast_rateidx = -1;
1236 sdata->u.ap.max_ratectrl_rateidx = -1;
1237 ieee80211_if_sdata_init(sdata);
1238 list_add_tail(&sdata->list, &local->sub_if_list);
1239
1240 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1241 (unsigned long)local);
1242 tasklet_disable(&local->tx_pending_tasklet);
1243
1244 tasklet_init(&local->tasklet,
1245 ieee80211_tasklet_handler,
1246 (unsigned long) local);
1247 tasklet_disable(&local->tasklet);
1248
1249 skb_queue_head_init(&local->skb_queue);
1250 skb_queue_head_init(&local->skb_queue_unreliable);
1251
1252 return local_to_hw(local);
1253}
1254EXPORT_SYMBOL(ieee80211_alloc_hw);
1255
1256int ieee80211_register_hw(struct ieee80211_hw *hw)
1257{
1258 struct ieee80211_local *local = hw_to_local(hw);
1259 const char *name;
1260 int result;
1261
1262 result = wiphy_register(local->hw.wiphy);
1263 if (result < 0)
1264 return result;
1265
1266 name = wiphy_dev(local->hw.wiphy)->driver->name;
1267 local->hw.workqueue = create_singlethread_workqueue(name);
1268 if (!local->hw.workqueue) {
1269 result = -ENOMEM;
1270 goto fail_workqueue;
1271 }
1272
b306f453
JB		 1273 /*
1274 * The hardware needs headroom for sending the frame,
1275 * and we need some headroom for passing the frame to monitor
1276 * interfaces, but never both at the same time.
1277 */
33ccad35
JB		 1278 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1279 sizeof(struct ieee80211_tx_status_rtap_hdr));
b306f453 1280
e9f207f0
JB		 1281 debugfs_hw_add(local);
1282
f0706e82
JB		 1283 local->hw.conf.beacon_int = 1000;
1284
1285 local->wstats_flags |= local->hw.max_rssi ?
1286 IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID;
1287 local->wstats_flags |= local->hw.max_signal ?
1288 IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1289 local->wstats_flags |= local->hw.max_noise ?
1290 IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1291 if (local->hw.max_rssi < 0 || local->hw.max_noise < 0)
1292 local->wstats_flags |= IW_QUAL_DBM;
1293
1294 result = sta_info_start(local);
1295 if (result < 0)
1296 goto fail_sta_info;
1297
1298 rtnl_lock();
1299 result = dev_alloc_name(local->mdev, local->mdev->name);
1300 if (result < 0)
1301 goto fail_dev;
1302
1303 memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1304 SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1305
1306 result = register_netdevice(local->mdev);
1307 if (result < 0)
1308 goto fail_dev;
1309
e9f207f0
JB		 1310 ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1311
f0706e82
JB		 1312 result = ieee80211_init_rate_ctrl_alg(local, NULL);
1313 if (result < 0) {
1314 printk(KERN_DEBUG "%s: Failed to initialize rate control "
1315 "algorithm\n", local->mdev->name);
1316 goto fail_rate;
1317 }
1318
1319 result = ieee80211_wep_init(local);
1320
1321 if (result < 0) {
1322 printk(KERN_DEBUG "%s: Failed to initialize wep\n",
1323 local->mdev->name);
1324 goto fail_wep;
1325 }
1326
1327 ieee80211_install_qdisc(local->mdev);
1328
1329 /* add one default STA interface */
1330 result = ieee80211_if_add(local->mdev, "wlan%d", NULL,
1331 IEEE80211_IF_TYPE_STA);
1332 if (result)
1333 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
1334 local->mdev->name);
1335
1336 local->reg_state = IEEE80211_DEV_REGISTERED;
1337 rtnl_unlock();
1338
1339 ieee80211_led_init(local);
1340
1341 return 0;
1342
1343fail_wep:
1344 rate_control_deinitialize(local);
1345fail_rate:
e9f207f0 1346 ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
f0706e82
JB		 1347 unregister_netdevice(local->mdev);
1348fail_dev:
1349 rtnl_unlock();
1350 sta_info_stop(local);
1351fail_sta_info:
e9f207f0 1352 debugfs_hw_del(local);
f0706e82
JB		 1353 destroy_workqueue(local->hw.workqueue);
1354fail_workqueue:
1355 wiphy_unregister(local->hw.wiphy);
1356 return result;
1357}
1358EXPORT_SYMBOL(ieee80211_register_hw);
1359
1360int ieee80211_register_hwmode(struct ieee80211_hw *hw,
1361 struct ieee80211_hw_mode *mode)
1362{
1363 struct ieee80211_local *local = hw_to_local(hw);
1364 struct ieee80211_rate *rate;
1365 int i;
1366
1367 INIT_LIST_HEAD(&mode->list);
1368 list_add_tail(&mode->list, &local->modes_list);
1369
1370 local->hw_modes |= (1 << mode->mode);
1371 for (i = 0; i < mode->num_rates; i++) {
1372 rate = &(mode->rates[i]);
1373 rate->rate_inv = CHAN_UTIL_RATE_LCM / rate->rate;
1374 }
1375 ieee80211_prepare_rates(local, mode);
1376
1377 if (!local->oper_hw_mode) {
1378 /* Default to this mode */
1379 local->hw.conf.phymode = mode->mode;
1380 local->oper_hw_mode = local->scan_hw_mode = mode;
1381 local->oper_channel = local->scan_channel = &mode->channels[0];
1382 local->hw.conf.mode = local->oper_hw_mode;
1383 local->hw.conf.chan = local->oper_channel;
1384 }
1385
1386 if (!(hw->flags & IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED))
fd8bacc9 1387 ieee80211_set_default_regdomain(mode);
f0706e82
JB		 1388
1389 return 0;
1390}
1391EXPORT_SYMBOL(ieee80211_register_hwmode);
1392
1393void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1394{
1395 struct ieee80211_local *local = hw_to_local(hw);
1396 struct ieee80211_sub_if_data *sdata, *tmp;
1397 struct list_head tmp_list;
1398 int i;
1399
1400 tasklet_kill(&local->tx_pending_tasklet);
1401 tasklet_kill(&local->tasklet);
1402
1403 rtnl_lock();
1404
1405 BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED);
1406
1407 local->reg_state = IEEE80211_DEV_UNREGISTERED;
1408 if (local->apdev)
1409 ieee80211_if_del_mgmt(local);
1410
1411 write_lock_bh(&local->sub_if_lock);
1412 list_replace_init(&local->sub_if_list, &tmp_list);
1413 write_unlock_bh(&local->sub_if_lock);
1414
1415 list_for_each_entry_safe(sdata, tmp, &tmp_list, list)
1416 __ieee80211_if_del(local, sdata);
1417
1418 rtnl_unlock();
1419
f0706e82
JB		 1420 ieee80211_rx_bss_list_deinit(local->mdev);
1421 ieee80211_clear_tx_pending(local);
1422 sta_info_stop(local);
1423 rate_control_deinitialize(local);
e9f207f0 1424 debugfs_hw_del(local);
f0706e82
JB		 1425
1426 for (i = 0; i < NUM_IEEE80211_MODES; i++) {
1427 kfree(local->supp_rates[i]);
1428 kfree(local->basic_rates[i]);
1429 }
1430
1431 if (skb_queue_len(&local->skb_queue)
1432 || skb_queue_len(&local->skb_queue_unreliable))
1433 printk(KERN_WARNING "%s: skb_queue not empty\n",
1434 local->mdev->name);
1435 skb_queue_purge(&local->skb_queue);
1436 skb_queue_purge(&local->skb_queue_unreliable);
1437
1438 destroy_workqueue(local->hw.workqueue);
1439 wiphy_unregister(local->hw.wiphy);
1440 ieee80211_wep_free(local);
1441 ieee80211_led_exit(local);
1442}
1443EXPORT_SYMBOL(ieee80211_unregister_hw);
1444
1445void ieee80211_free_hw(struct ieee80211_hw *hw)
1446{
1447 struct ieee80211_local *local = hw_to_local(hw);
1448
1449 ieee80211_if_free(local->mdev);
1450 wiphy_free(local->hw.wiphy);
1451}
1452EXPORT_SYMBOL(ieee80211_free_hw);
1453
f0706e82
JB		 1454static int __init ieee80211_init(void)
1455{
1456 struct sk_buff *skb;
1457 int ret;
1458
1459 BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb));
1460
1461 ret = ieee80211_wme_register();
1462 if (ret) {
1463 printk(KERN_DEBUG "ieee80211_init: failed to "
1464 "initialize WME (err=%d)\n", ret);
1465 return ret;
1466 }
1467
e9f207f0 1468 ieee80211_debugfs_netdev_init();
fd8bacc9 1469 ieee80211_regdomain_init();
e9f207f0 1470
f0706e82
JB		 1471 return 0;
1472}
1473
f0706e82
JB		 1474static void __exit ieee80211_exit(void)
1475{
1476 ieee80211_wme_unregister();
e9f207f0 1477 ieee80211_debugfs_netdev_exit();
f0706e82
JB		 1478}
1479
1480
ca9938fe 1481subsys_initcall(ieee80211_init);
f0706e82
JB		 1482module_exit(ieee80211_exit);
1483
1484MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1485MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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