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[MAC80211]: Remove bitfields from struct ieee80211_txrx_data
[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
571ecf67
JB		 204void ieee80211_key_threshold_notify(struct net_device *dev,
205 struct ieee80211_key *key,
206 struct sta_info *sta)
f0706e82
JB		 207{
208 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
209 struct sk_buff *skb;
210 struct ieee80211_msg_key_notification *msg;
211
212 /* if no one will get it anyway, don't even allocate it.
213 * unlikely because this is only relevant for APs
214 * where the device must be open... */
215 if (unlikely(!local->apdev))
216 return;
217
218 skb = dev_alloc_skb(sizeof(struct ieee80211_frame_info) +
219 sizeof(struct ieee80211_msg_key_notification));
220 if (!skb)
221 return;
222
223 skb_reserve(skb, sizeof(struct ieee80211_frame_info));
224 msg = (struct ieee80211_msg_key_notification *)
225 skb_put(skb, sizeof(struct ieee80211_msg_key_notification));
226 msg->tx_rx_count = key->tx_rx_count;
227 memcpy(msg->ifname, dev->name, IFNAMSIZ);
228 if (sta)
229 memcpy(msg->addr, sta->addr, ETH_ALEN);
230 else
231 memset(msg->addr, 0xff, ETH_ALEN);
232
233 key->tx_rx_count = 0;
234
235 ieee80211_rx_mgmt(local, skb, NULL,
236 ieee80211_msg_key_threshold_notification);
237}
238
b2c258fb 239static int ieee80211_mgmt_open(struct net_device *dev)
f0706e82 240{
b2c258fb 241 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
f0706e82 242
b2c258fb
JB		 243 if (!netif_running(local->mdev))
244 return -EOPNOTSUPP;
245 return 0;
e2ebc74d 246}
f0706e82 247
b2c258fb 248static int ieee80211_mgmt_stop(struct net_device *dev)
e2ebc74d 249{
b2c258fb
JB		 250 return 0;
251}
f0706e82 252
b2c258fb
JB		 253static int ieee80211_change_mtu_apdev(struct net_device *dev, int new_mtu)
254{
255 /* FIX: what would be proper limits for MTU?
256 * This interface uses 802.11 frames. */
257 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN) {
258 printk(KERN_WARNING "%s: invalid MTU %d\n",
259 dev->name, new_mtu);
260 return -EINVAL;
f0706e82 261 }
f0706e82 262
b2c258fb
JB		 263#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
264 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
265#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
266 dev->mtu = new_mtu;
267 return 0;
e2ebc74d 268}
f0706e82 269
b2c258fb 270void ieee80211_if_mgmt_setup(struct net_device *dev)
e2ebc74d 271{
b2c258fb
JB		 272 ether_setup(dev);
273 dev->hard_start_xmit = ieee80211_mgmt_start_xmit;
274 dev->change_mtu = ieee80211_change_mtu_apdev;
275 dev->get_stats = ieee80211_get_stats;
276 dev->open = ieee80211_mgmt_open;
277 dev->stop = ieee80211_mgmt_stop;
278 dev->type = ARPHRD_IEEE80211_PRISM;
279 dev->hard_header_parse = header_parse_80211;
280 dev->uninit = ieee80211_if_reinit;
281 dev->destructor = ieee80211_if_free;
f0706e82
JB		 282}
283
b2c258fb 284/* regular interfaces */
f0706e82 285
b2c258fb 286static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
f0706e82 287{
b2c258fb
JB		 288 /* FIX: what would be proper limits for MTU?
289 * This interface uses 802.3 frames. */
290 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6) {
291 printk(KERN_WARNING "%s: invalid MTU %d\n",
292 dev->name, new_mtu);
293 return -EINVAL;
294 }
f0706e82 295
b2c258fb
JB		 296#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
297 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
298#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
299 dev->mtu = new_mtu;
f0706e82
JB		 300 return 0;
301}
302
b2c258fb
JB		 303static inline int identical_mac_addr_allowed(int type1, int type2)
304{
305 return (type1 == IEEE80211_IF_TYPE_MNTR ||
306 type2 == IEEE80211_IF_TYPE_MNTR ||
307 (type1 == IEEE80211_IF_TYPE_AP &&
308 type2 == IEEE80211_IF_TYPE_WDS) ||
309 (type1 == IEEE80211_IF_TYPE_WDS &&
310 (type2 == IEEE80211_IF_TYPE_WDS ||
311 type2 == IEEE80211_IF_TYPE_AP)) ||
312 (type1 == IEEE80211_IF_TYPE_AP &&
313 type2 == IEEE80211_IF_TYPE_VLAN) ||
314 (type1 == IEEE80211_IF_TYPE_VLAN &&
315 (type2 == IEEE80211_IF_TYPE_AP ||
316 type2 == IEEE80211_IF_TYPE_VLAN)));
317}
f0706e82 318
b2c258fb
JB		 319/* Check if running monitor interfaces should go to a "soft monitor" mode
320 * and switch them if necessary. */
321static inline void ieee80211_start_soft_monitor(struct ieee80211_local *local)
f0706e82 322{
b2c258fb 323 struct ieee80211_if_init_conf conf;
f0706e82 324
b2c258fb
JB		 325 if (local->open_count && local->open_count == local->monitors &&
326 !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER) &&
327 local->ops->remove_interface) {
328 conf.if_id = -1;
329 conf.type = IEEE80211_IF_TYPE_MNTR;
330 conf.mac_addr = NULL;
331 local->ops->remove_interface(local_to_hw(local), &conf);
f0706e82 332 }
f0706e82
JB		 333}
334
b2c258fb
JB		 335/* Check if running monitor interfaces should go to a "hard monitor" mode
336 * and switch them if necessary. */
337static void ieee80211_start_hard_monitor(struct ieee80211_local *local)
f0706e82 338{
b2c258fb 339 struct ieee80211_if_init_conf conf;
f0706e82 340
b2c258fb
JB		 341 if (local->open_count && local->open_count == local->monitors &&
342 !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
343 conf.if_id = -1;
344 conf.type = IEEE80211_IF_TYPE_MNTR;
345 conf.mac_addr = NULL;
346 local->ops->add_interface(local_to_hw(local), &conf);
f0706e82 347 }
e2ebc74d 348}
f0706e82 349
8a69aa93
DD		 350static void ieee80211_if_open(struct net_device *dev)
351{
352 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
353
354 switch (sdata->type) {
355 case IEEE80211_IF_TYPE_STA:
356 case IEEE80211_IF_TYPE_IBSS:
357 sdata->u.sta.prev_bssid_set = 0;
358 break;
359 }
360}
361
b2c258fb 362static int ieee80211_open(struct net_device *dev)
e2ebc74d 363{
b2c258fb
JB		 364 struct ieee80211_sub_if_data *sdata, *nsdata;
365 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
366 struct ieee80211_if_init_conf conf;
367 int res;
f0706e82 368
b2c258fb
JB		 369 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
370 read_lock(&local->sub_if_lock);
371 list_for_each_entry(nsdata, &local->sub_if_list, list) {
372 struct net_device *ndev = nsdata->dev;
e2ebc74d 373
b2c258fb
JB		 374 if (ndev != dev && ndev != local->mdev && netif_running(ndev) &&
375 compare_ether_addr(dev->dev_addr, ndev->dev_addr) == 0 &&
376 !identical_mac_addr_allowed(sdata->type, nsdata->type)) {
377 read_unlock(&local->sub_if_lock);
378 return -ENOTUNIQ;
379 }
380 }
381 read_unlock(&local->sub_if_lock);
f0706e82 382
b2c258fb
JB		 383 if (sdata->type == IEEE80211_IF_TYPE_WDS &&
384 is_zero_ether_addr(sdata->u.wds.remote_addr))
385 return -ENOLINK;
f0706e82 386
b2c258fb
JB		 387 if (sdata->type == IEEE80211_IF_TYPE_MNTR && local->open_count &&
388 !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
389 /* run the interface in a "soft monitor" mode */
390 local->monitors++;
391 local->open_count++;
392 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
393 return 0;
394 }
8a69aa93 395 ieee80211_if_open(dev);
b2c258fb 396 ieee80211_start_soft_monitor(local);
f0706e82 397
b2c258fb
JB		 398 conf.if_id = dev->ifindex;
399 conf.type = sdata->type;
1bec3f1a
JB		 400 if (sdata->type == IEEE80211_IF_TYPE_MNTR)
401 conf.mac_addr = NULL;
402 else
403 conf.mac_addr = dev->dev_addr;
b2c258fb
JB		 404 res = local->ops->add_interface(local_to_hw(local), &conf);
405 if (res) {
406 if (sdata->type == IEEE80211_IF_TYPE_MNTR)
407 ieee80211_start_hard_monitor(local);
408 return res;
409 }
f0706e82 410
b2c258fb
JB		 411 if (local->open_count == 0) {
412 res = 0;
413 tasklet_enable(&local->tx_pending_tasklet);
414 tasklet_enable(&local->tasklet);
415 if (local->ops->open)
416 res = local->ops->open(local_to_hw(local));
417 if (res == 0) {
418 res = dev_open(local->mdev);
419 if (res) {
420 if (local->ops->stop)
421 local->ops->stop(local_to_hw(local));
422 } else {
423 res = ieee80211_hw_config(local);
424 if (res && local->ops->stop)
425 local->ops->stop(local_to_hw(local));
426 else if (!res && local->apdev)
427 dev_open(local->apdev);
428 }
429 }
430 if (res) {
431 if (local->ops->remove_interface)
432 local->ops->remove_interface(local_to_hw(local),
433 &conf);
434 return res;
435 }
436 }
437 local->open_count++;
f0706e82 438
b2c258fb
JB		 439 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
440 local->monitors++;
441 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
d9430a32 442 } else {
b2c258fb 443 ieee80211_if_config(dev);
d9430a32
DD		 444 ieee80211_reset_erp_info(dev);
445 }
f0706e82 446
b2c258fb
JB		 447 if (sdata->type == IEEE80211_IF_TYPE_STA &&
448 !local->user_space_mlme)
449 netif_carrier_off(dev);
450 else
451 netif_carrier_on(dev);
f0706e82 452
b2c258fb
JB		 453 netif_start_queue(dev);
454 return 0;
f0706e82 455}
f0706e82 456
b2c258fb 457static void ieee80211_if_shutdown(struct net_device *dev)
f0706e82 458{
f0706e82 459 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
b2c258fb 460 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
f0706e82 461
b2c258fb
JB		 462 ASSERT_RTNL();
463 switch (sdata->type) {
464 case IEEE80211_IF_TYPE_STA:
465 case IEEE80211_IF_TYPE_IBSS:
466 sdata->u.sta.state = IEEE80211_DISABLED;
467 del_timer_sync(&sdata->u.sta.timer);
2a8a9a88
JB		 468 /*
469 * Holding the sub_if_lock for writing here blocks
470 * out the receive path and makes sure it's not
471 * currently processing a packet that may get
472 * added to the queue.
473 */
474 write_lock_bh(&local->sub_if_lock);
b2c258fb 475 skb_queue_purge(&sdata->u.sta.skb_queue);
2a8a9a88
JB		 476 write_unlock_bh(&local->sub_if_lock);
477
b2c258fb
JB		 478 if (!local->ops->hw_scan &&
479 local->scan_dev == sdata->dev) {
480 local->sta_scanning = 0;
481 cancel_delayed_work(&local->scan_work);
482 }
483 flush_workqueue(local->hw.workqueue);
484 break;
f0706e82 485 }
f0706e82
JB		 486}
487
b2c258fb 488static int ieee80211_stop(struct net_device *dev)
f0706e82 489{
b2c258fb 490 struct ieee80211_sub_if_data *sdata;
f0706e82 491 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
f0706e82 492
b2c258fb 493 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
f0706e82 494
b2c258fb
JB		 495 if (sdata->type == IEEE80211_IF_TYPE_MNTR &&
496 local->open_count > 1 &&
497 !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
498 /* remove "soft monitor" interface */
499 local->open_count--;
500 local->monitors--;
501 if (!local->monitors)
502 local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
503 return 0;
f0706e82
JB		 504 }
505
b2c258fb
JB		 506 netif_stop_queue(dev);
507 ieee80211_if_shutdown(dev);
f0706e82 508
b2c258fb
JB		 509 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
510 local->monitors--;
511 if (!local->monitors)
512 local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
f0706e82
JB		 513 }
514
b2c258fb
JB		 515 local->open_count--;
516 if (local->open_count == 0) {
517 if (netif_running(local->mdev))
518 dev_close(local->mdev);
519 if (local->apdev)
520 dev_close(local->apdev);
521 if (local->ops->stop)
522 local->ops->stop(local_to_hw(local));
523 tasklet_disable(&local->tx_pending_tasklet);
524 tasklet_disable(&local->tasklet);
525 }
526 if (local->ops->remove_interface) {
527 struct ieee80211_if_init_conf conf;
f0706e82 528
b2c258fb
JB		 529 conf.if_id = dev->ifindex;
530 conf.type = sdata->type;
531 conf.mac_addr = dev->dev_addr;
532 local->ops->remove_interface(local_to_hw(local), &conf);
f0706e82
JB		 533 }
534
b2c258fb
JB		 535 ieee80211_start_hard_monitor(local);
536
f0706e82
JB		 537 return 0;
538}
539
540enum netif_tx_lock_class {
541 TX_LOCK_NORMAL,
542 TX_LOCK_MASTER,
543};
544
545static inline void netif_tx_lock_nested(struct net_device *dev, int subclass)
546{
547 spin_lock_nested(&dev->_xmit_lock, subclass);
548 dev->xmit_lock_owner = smp_processor_id();
549}
550
551static void ieee80211_set_multicast_list(struct net_device *dev)
552{
553 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
554 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
555 unsigned short flags;
556
557 netif_tx_lock_nested(local->mdev, TX_LOCK_MASTER);
558 if (((dev->flags & IFF_ALLMULTI) != 0) ^ (sdata->allmulti != 0)) {
559 if (sdata->allmulti) {
560 sdata->allmulti = 0;
561 local->iff_allmultis--;
562 } else {
563 sdata->allmulti = 1;
564 local->iff_allmultis++;
565 }
566 }
567 if (((dev->flags & IFF_PROMISC) != 0) ^ (sdata->promisc != 0)) {
568 if (sdata->promisc) {
569 sdata->promisc = 0;
570 local->iff_promiscs--;
571 } else {
572 sdata->promisc = 1;
573 local->iff_promiscs++;
574 }
575 }
576 if (dev->mc_count != sdata->mc_count) {
577 local->mc_count = local->mc_count - sdata->mc_count +
578 dev->mc_count;
579 sdata->mc_count = dev->mc_count;
580 }
581 if (local->ops->set_multicast_list) {
582 flags = local->mdev->flags;
583 if (local->iff_allmultis)
584 flags |= IFF_ALLMULTI;
585 if (local->iff_promiscs)
586 flags |= IFF_PROMISC;
587 read_lock(&local->sub_if_lock);
588 local->ops->set_multicast_list(local_to_hw(local), flags,
589 local->mc_count);
590 read_unlock(&local->sub_if_lock);
591 }
592 netif_tx_unlock(local->mdev);
593}
594
b2c258fb
JB		 595/* Must not be called for mdev and apdev */
596void ieee80211_if_setup(struct net_device *dev)
f0706e82 597{
b2c258fb
JB		 598 ether_setup(dev);
599 dev->hard_start_xmit = ieee80211_subif_start_xmit;
600 dev->wireless_handlers = &ieee80211_iw_handler_def;
601 dev->set_multicast_list = ieee80211_set_multicast_list;
602 dev->change_mtu = ieee80211_change_mtu;
603 dev->get_stats = ieee80211_get_stats;
604 dev->open = ieee80211_open;
605 dev->stop = ieee80211_stop;
606 dev->uninit = ieee80211_if_reinit;
607 dev->destructor = ieee80211_if_free;
608}
f0706e82 609
b2c258fb
JB		 610/* WDS specialties */
611
612int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr)
613{
614 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
615 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
616 struct sta_info *sta;
617
618 if (compare_ether_addr(remote_addr, sdata->u.wds.remote_addr) == 0)
619 return 0;
620
621 /* Create STA entry for the new peer */
622 sta = sta_info_add(local, dev, remote_addr, GFP_KERNEL);
623 if (!sta)
624 return -ENOMEM;
625 sta_info_put(sta);
626
627 /* Remove STA entry for the old peer */
628 sta = sta_info_get(local, sdata->u.wds.remote_addr);
629 if (sta) {
be8755e1 630 sta_info_free(sta);
b2c258fb 631 sta_info_put(sta);
b2c258fb
JB		 632 } else {
633 printk(KERN_DEBUG "%s: could not find STA entry for WDS link "
634 "peer " MAC_FMT "\n",
635 dev->name, MAC_ARG(sdata->u.wds.remote_addr));
636 }
637
638 /* Update WDS link data */
639 memcpy(&sdata->u.wds.remote_addr, remote_addr, ETH_ALEN);
640
641 return 0;
f0706e82 642}
f0706e82 643
b2c258fb
JB		 644/* everything else */
645
b2c258fb
JB		 646static int __ieee80211_if_config(struct net_device *dev,
647 struct sk_buff *beacon,
648 struct ieee80211_tx_control *control)
649{
650 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
651 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
652 struct ieee80211_if_conf conf;
653 static u8 scan_bssid[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
654
655 if (!local->ops->config_interface || !netif_running(dev))
f0706e82 656 return 0;
f0706e82 657
b2c258fb 658 memset(&conf, 0, sizeof(conf));
4480f15c 659 conf.type = sdata->type;
b2c258fb
JB		 660 if (sdata->type == IEEE80211_IF_TYPE_STA ||
661 sdata->type == IEEE80211_IF_TYPE_IBSS) {
662 if (local->sta_scanning &&
663 local->scan_dev == dev)
664 conf.bssid = scan_bssid;
665 else
666 conf.bssid = sdata->u.sta.bssid;
667 conf.ssid = sdata->u.sta.ssid;
668 conf.ssid_len = sdata->u.sta.ssid_len;
669 conf.generic_elem = sdata->u.sta.extra_ie;
670 conf.generic_elem_len = sdata->u.sta.extra_ie_len;
671 } else if (sdata->type == IEEE80211_IF_TYPE_AP) {
672 conf.ssid = sdata->u.ap.ssid;
673 conf.ssid_len = sdata->u.ap.ssid_len;
674 conf.generic_elem = sdata->u.ap.generic_elem;
675 conf.generic_elem_len = sdata->u.ap.generic_elem_len;
676 conf.beacon = beacon;
677 conf.beacon_control = control;
f0706e82 678 }
b2c258fb
JB		 679 return local->ops->config_interface(local_to_hw(local),
680 dev->ifindex, &conf);
f0706e82
JB		 681}
682
b2c258fb
JB		 683int ieee80211_if_config(struct net_device *dev)
684{
685 return __ieee80211_if_config(dev, NULL, NULL);
686}
f0706e82 687
b2c258fb 688int ieee80211_if_config_beacon(struct net_device *dev)
f0706e82 689{
f0706e82 690 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
b2c258fb
JB		 691 struct ieee80211_tx_control control;
692 struct sk_buff *skb;
f0706e82 693
b2c258fb 694 if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
f0706e82 695 return 0;
b2c258fb
JB		 696 skb = ieee80211_beacon_get(local_to_hw(local), dev->ifindex, &control);
697 if (!skb)
698 return -ENOMEM;
699 return __ieee80211_if_config(dev, skb, &control);
700}
f0706e82 701
b2c258fb
JB		 702int ieee80211_hw_config(struct ieee80211_local *local)
703{
704 struct ieee80211_hw_mode *mode;
705 struct ieee80211_channel *chan;
706 int ret = 0;
f0706e82 707
b2c258fb
JB		 708 if (local->sta_scanning) {
709 chan = local->scan_channel;
710 mode = local->scan_hw_mode;
711 } else {
712 chan = local->oper_channel;
713 mode = local->oper_hw_mode;
f0706e82
JB		 714 }
715
b2c258fb
JB		 716 local->hw.conf.channel = chan->chan;
717 local->hw.conf.channel_val = chan->val;
718 local->hw.conf.power_level = chan->power_level;
719 local->hw.conf.freq = chan->freq;
720 local->hw.conf.phymode = mode->mode;
721 local->hw.conf.antenna_max = chan->antenna_max;
722 local->hw.conf.chan = chan;
723 local->hw.conf.mode = mode;
f0706e82 724
b2c258fb
JB		 725#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
726 printk(KERN_DEBUG "HW CONFIG: channel=%d freq=%d "
727 "phymode=%d\n", local->hw.conf.channel, local->hw.conf.freq,
728 local->hw.conf.phymode);
729#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
730
731 if (local->ops->config)
732 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
f0706e82 733
b2c258fb
JB		 734 return ret;
735}
f0706e82 736
d9430a32
DD		 737void ieee80211_erp_info_change_notify(struct net_device *dev, u8 changes)
738{
739 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
740 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
741 if (local->ops->erp_ie_changed)
742 local->ops->erp_ie_changed(local_to_hw(local), changes,
743 sdata->use_protection,
744 !sdata->short_preamble);
745}
746
747void ieee80211_reset_erp_info(struct net_device *dev)
748{
749 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
750
751 sdata->short_preamble = 0;
752 sdata->use_protection = 0;
753 ieee80211_erp_info_change_notify(dev,
754 IEEE80211_ERP_CHANGE_PROTECTION |
755 IEEE80211_ERP_CHANGE_PREAMBLE);
756}
757
b2c258fb
JB		 758struct dev_mc_list *ieee80211_get_mc_list_item(struct ieee80211_hw *hw,
759 struct dev_mc_list *prev,
760 void **ptr)
f0706e82 761{
b2c258fb
JB		 762 struct ieee80211_local *local = hw_to_local(hw);
763 struct ieee80211_sub_if_data *sdata = *ptr;
764 struct dev_mc_list *mc;
765
766 if (!prev) {
767 WARN_ON(sdata);
768 sdata = NULL;
769 }
770 if (!prev || !prev->next) {
771 if (sdata)
772 sdata = list_entry(sdata->list.next,
773 struct ieee80211_sub_if_data, list);
774 else
775 sdata = list_entry(local->sub_if_list.next,
776 struct ieee80211_sub_if_data, list);
777 if (&sdata->list != &local->sub_if_list)
778 mc = sdata->dev->mc_list;
779 else
780 mc = NULL;
781 } else
782 mc = prev->next;
783
784 *ptr = sdata;
785 return mc;
f0706e82 786}
b2c258fb 787EXPORT_SYMBOL(ieee80211_get_mc_list_item);
f0706e82 788
f0706e82
JB		 789void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
790 struct sk_buff *skb,
791 struct ieee80211_tx_status *status)
792{
793 struct ieee80211_local *local = hw_to_local(hw);
794 struct ieee80211_tx_status *saved;
795 int tmp;
796
797 skb->dev = local->mdev;
798 saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC);
799 if (unlikely(!saved)) {
800 if (net_ratelimit())
801 printk(KERN_WARNING "%s: Not enough memory, "
802 "dropping tx status", skb->dev->name);
803 /* should be dev_kfree_skb_irq, but due to this function being
804 * named _irqsafe instead of just _irq we can't be sure that
805 * people won't call it from non-irq contexts */
806 dev_kfree_skb_any(skb);
807 return;
808 }
809 memcpy(saved, status, sizeof(struct ieee80211_tx_status));
810 /* copy pointer to saved status into skb->cb for use by tasklet */
811 memcpy(skb->cb, &saved, sizeof(saved));
812
813 skb->pkt_type = IEEE80211_TX_STATUS_MSG;
814 skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ?
815 &local->skb_queue : &local->skb_queue_unreliable, skb);
816 tmp = skb_queue_len(&local->skb_queue) +
817 skb_queue_len(&local->skb_queue_unreliable);
818 while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
819 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
820 memcpy(&saved, skb->cb, sizeof(saved));
821 kfree(saved);
822 dev_kfree_skb_irq(skb);
823 tmp--;
824 I802_DEBUG_INC(local->tx_status_drop);
825 }
826 tasklet_schedule(&local->tasklet);
827}
828EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
829
830static void ieee80211_tasklet_handler(unsigned long data)
831{
832 struct ieee80211_local *local = (struct ieee80211_local *) data;
833 struct sk_buff *skb;
834 struct ieee80211_rx_status rx_status;
835 struct ieee80211_tx_status *tx_status;
836
837 while ((skb = skb_dequeue(&local->skb_queue)) ||
838 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
839 switch (skb->pkt_type) {
840 case IEEE80211_RX_MSG:
841 /* status is in skb->cb */
842 memcpy(&rx_status, skb->cb, sizeof(rx_status));
843 /* Clear skb->type in order to not confuse kernel
844 * netstack. */
845 skb->pkt_type = 0;
846 __ieee80211_rx(local_to_hw(local), skb, &rx_status);
847 break;
848 case IEEE80211_TX_STATUS_MSG:
849 /* get pointer to saved status out of skb->cb */
850 memcpy(&tx_status, skb->cb, sizeof(tx_status));
851 skb->pkt_type = 0;
852 ieee80211_tx_status(local_to_hw(local),
853 skb, tx_status);
854 kfree(tx_status);
855 break;
856 default: /* should never get here! */
857 printk(KERN_ERR "%s: Unknown message type (%d)\n",
858 local->mdev->name, skb->pkt_type);
859 dev_kfree_skb(skb);
860 break;
861 }
862 }
863}
864
f0706e82
JB		 865/* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
866 * make a prepared TX frame (one that has been given to hw) to look like brand
867 * new IEEE 802.11 frame that is ready to go through TX processing again.
868 * Also, tx_packet_data in cb is restored from tx_control. */
869static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
870 struct ieee80211_key *key,
871 struct sk_buff *skb,
872 struct ieee80211_tx_control *control)
873{
874 int hdrlen, iv_len, mic_len;
875 struct ieee80211_tx_packet_data *pkt_data;
876
877 pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
878 pkt_data->ifindex = control->ifindex;
e8bf9649
JS		 879 pkt_data->flags = 0;
880 if (control->flags & IEEE80211_TXCTL_REQ_TX_STATUS)
881 pkt_data->flags |= IEEE80211_TXPD_REQ_TX_STATUS;
882 if (control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT)
883 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
884 if (control->flags & IEEE80211_TXCTL_REQUEUE)
885 pkt_data->flags |= IEEE80211_TXPD_REQUEUE;
886 if (control->type == IEEE80211_IF_TYPE_MGMT)
887 pkt_data->flags |= IEEE80211_TXPD_MGMT_IFACE;
f0706e82
JB		 888 pkt_data->queue = control->queue;
889
890 hdrlen = ieee80211_get_hdrlen_from_skb(skb);
891
892 if (!key)
893 goto no_key;
894
895 switch (key->alg) {
896 case ALG_WEP:
897 iv_len = WEP_IV_LEN;
898 mic_len = WEP_ICV_LEN;
899 break;
900 case ALG_TKIP:
901 iv_len = TKIP_IV_LEN;
902 mic_len = TKIP_ICV_LEN;
903 break;
904 case ALG_CCMP:
905 iv_len = CCMP_HDR_LEN;
906 mic_len = CCMP_MIC_LEN;
907 break;
908 default:
909 goto no_key;
910 }
911
912 if (skb->len >= mic_len && key->force_sw_encrypt)
913 skb_trim(skb, skb->len - mic_len);
914 if (skb->len >= iv_len && skb->len > hdrlen) {
915 memmove(skb->data + iv_len, skb->data, hdrlen);
916 skb_pull(skb, iv_len);
917 }
918
919no_key:
920 {
921 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
922 u16 fc = le16_to_cpu(hdr->frame_control);
923 if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
924 fc &= ~IEEE80211_STYPE_QOS_DATA;
925 hdr->frame_control = cpu_to_le16(fc);
926 memmove(skb->data + 2, skb->data, hdrlen - 2);
927 skb_pull(skb, 2);
928 }
929 }
930}
931
f0706e82
JB		 932void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
933 struct ieee80211_tx_status *status)
934{
935 struct sk_buff *skb2;
936 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
937 struct ieee80211_local *local = hw_to_local(hw);
938 u16 frag, type;
939 u32 msg_type;
b306f453
JB		 940 struct ieee80211_tx_status_rtap_hdr *rthdr;
941 struct ieee80211_sub_if_data *sdata;
942 int monitors;
f0706e82
JB		 943
944 if (!status) {
945 printk(KERN_ERR
946 "%s: ieee80211_tx_status called with NULL status\n",
947 local->mdev->name);
948 dev_kfree_skb(skb);
949 return;
950 }
951
952 if (status->excessive_retries) {
953 struct sta_info *sta;
954 sta = sta_info_get(local, hdr->addr1);
955 if (sta) {
956 if (sta->flags & WLAN_STA_PS) {
957 /* The STA is in power save mode, so assume
958 * that this TX packet failed because of that.
959 */
960 status->excessive_retries = 0;
961 status->flags |= IEEE80211_TX_STATUS_TX_FILTERED;
962 }
963 sta_info_put(sta);
964 }
965 }
966
967 if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) {
968 struct sta_info *sta;
969 sta = sta_info_get(local, hdr->addr1);
970 if (sta) {
971 sta->tx_filtered_count++;
972
973 /* Clear the TX filter mask for this STA when sending
974 * the next packet. If the STA went to power save mode,
975 * this will happen when it is waking up for the next
976 * time. */
977 sta->clear_dst_mask = 1;
978
979 /* TODO: Is the WLAN_STA_PS flag always set here or is
980 * the race between RX and TX status causing some
981 * packets to be filtered out before 80211.o gets an
982 * update for PS status? This seems to be the case, so
983 * no changes are likely to be needed. */
984 if (sta->flags & WLAN_STA_PS &&
985 skb_queue_len(&sta->tx_filtered) <
986 STA_MAX_TX_BUFFER) {
987 ieee80211_remove_tx_extra(local, sta->key,
988 skb,
989 &status->control);
990 skb_queue_tail(&sta->tx_filtered, skb);
991 } else if (!(sta->flags & WLAN_STA_PS) &&
992 !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) {
993 /* Software retry the packet once */
994 status->control.flags |= IEEE80211_TXCTL_REQUEUE;
995 ieee80211_remove_tx_extra(local, sta->key,
996 skb,
997 &status->control);
998 dev_queue_xmit(skb);
999 } else {
1000 if (net_ratelimit()) {
1001 printk(KERN_DEBUG "%s: dropped TX "
1002 "filtered frame queue_len=%d "
1003 "PS=%d @%lu\n",
1004 local->mdev->name,
1005 skb_queue_len(
1006 &sta->tx_filtered),
1007 !!(sta->flags & WLAN_STA_PS),
1008 jiffies);
1009 }
1010 dev_kfree_skb(skb);
1011 }
1012 sta_info_put(sta);
1013 return;
1014 }
1015 } else {
1016 /* FIXME: STUPID to call this with both local and local->mdev */
1017 rate_control_tx_status(local, local->mdev, skb, status);
1018 }
1019
1020 ieee80211_led_tx(local, 0);
1021
1022 /* SNMP counters
1023 * Fragments are passed to low-level drivers as separate skbs, so these
1024 * are actually fragments, not frames. Update frame counters only for
1025 * the first fragment of the frame. */
1026
1027 frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
1028 type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
1029
1030 if (status->flags & IEEE80211_TX_STATUS_ACK) {
1031 if (frag == 0) {
1032 local->dot11TransmittedFrameCount++;
1033 if (is_multicast_ether_addr(hdr->addr1))
1034 local->dot11MulticastTransmittedFrameCount++;
1035 if (status->retry_count > 0)
1036 local->dot11RetryCount++;
1037 if (status->retry_count > 1)
1038 local->dot11MultipleRetryCount++;
1039 }
1040
1041 /* This counter shall be incremented for an acknowledged MPDU
1042 * with an individual address in the address 1 field or an MPDU
1043 * with a multicast address in the address 1 field of type Data
1044 * or Management. */
1045 if (!is_multicast_ether_addr(hdr->addr1) ||
1046 type == IEEE80211_FTYPE_DATA ||
1047 type == IEEE80211_FTYPE_MGMT)
1048 local->dot11TransmittedFragmentCount++;
1049 } else {
1050 if (frag == 0)
1051 local->dot11FailedCount++;
1052 }
1053
b306f453
JB		 1054 msg_type = (status->flags & IEEE80211_TX_STATUS_ACK) ?
1055 ieee80211_msg_tx_callback_ack : ieee80211_msg_tx_callback_fail;
1056
1057 /* this was a transmitted frame, but now we want to reuse it */
1058 skb_orphan(skb);
1059
1060 if ((status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS) &&
1061 local->apdev) {
1062 if (local->monitors) {
1063 skb2 = skb_clone(skb, GFP_ATOMIC);
1064 } else {
1065 skb2 = skb;
1066 skb = NULL;
1067 }
1068
1069 if (skb2)
1070 /* Send frame to hostapd */
1071 ieee80211_rx_mgmt(local, skb2, NULL, msg_type);
1072
1073 if (!skb)
1074 return;
1075 }
1076
1077 if (!local->monitors) {
f0706e82
JB		 1078 dev_kfree_skb(skb);
1079 return;
1080 }
1081
b306f453 1082 /* send frame to monitor interfaces now */
f0706e82 1083
b306f453
JB		 1084 if (skb_headroom(skb) < sizeof(*rthdr)) {
1085 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
f0706e82
JB		 1086 dev_kfree_skb(skb);
1087 return;
1088 }
f0706e82 1089
b306f453
JB		 1090 rthdr = (struct ieee80211_tx_status_rtap_hdr*)
1091 skb_push(skb, sizeof(*rthdr));
1092
1093 memset(rthdr, 0, sizeof(*rthdr));
1094 rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
1095 rthdr->hdr.it_present =
1096 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
1097 (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
1098
1099 if (!(status->flags & IEEE80211_TX_STATUS_ACK) &&
1100 !is_multicast_ether_addr(hdr->addr1))
1101 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
1102
1103 if ((status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) &&
1104 (status->control.flags & IEEE80211_TXCTL_USE_CTS_PROTECT))
1105 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
1106 else if (status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS)
1107 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
1108
1109 rthdr->data_retries = status->retry_count;
1110
1111 read_lock(&local->sub_if_lock);
1112 monitors = local->monitors;
1113 list_for_each_entry(sdata, &local->sub_if_list, list) {
1114 /*
1115 * Using the monitors counter is possibly racy, but
1116 * if the value is wrong we simply either clone the skb
1117 * once too much or forget sending it to one monitor iface
1118 * The latter case isn't nice but fixing the race is much
1119 * more complicated.
1120 */
1121 if (!monitors || !skb)
1122 goto out;
1123
1124 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
1125 if (!netif_running(sdata->dev))
1126 continue;
1127 monitors--;
1128 if (monitors)
1129 skb2 = skb_clone(skb, GFP_KERNEL);
1130 else
1131 skb2 = NULL;
1132 skb->dev = sdata->dev;
1133 /* XXX: is this sufficient for BPF? */
1134 skb_set_mac_header(skb, 0);
1135 skb->ip_summed = CHECKSUM_UNNECESSARY;
1136 skb->pkt_type = PACKET_OTHERHOST;
1137 skb->protocol = htons(ETH_P_802_2);
1138 memset(skb->cb, 0, sizeof(skb->cb));
1139 netif_rx(skb);
1140 skb = skb2;
b306f453
JB		 1141 }
1142 }
1143 out:
1144 read_unlock(&local->sub_if_lock);
1145 if (skb)
1146 dev_kfree_skb(skb);
f0706e82
JB		 1147}
1148EXPORT_SYMBOL(ieee80211_tx_status);
1149
f0706e82
JB		 1150struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
1151 const struct ieee80211_ops *ops)
1152{
1153 struct net_device *mdev;
1154 struct ieee80211_local *local;
1155 struct ieee80211_sub_if_data *sdata;
1156 int priv_size;
1157 struct wiphy *wiphy;
1158
1159 /* Ensure 32-byte alignment of our private data and hw private data.
1160 * We use the wiphy priv data for both our ieee80211_local and for
1161 * the driver's private data
1162 *
1163 * In memory it'll be like this:
1164 *
1165 * +-------------------------+
1166 * | struct wiphy |
1167 * +-------------------------+
1168 * | struct ieee80211_local |
1169 * +-------------------------+
1170 * | driver's private data |
1171 * +-------------------------+
1172 *
1173 */
1174 priv_size = ((sizeof(struct ieee80211_local) +
1175 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
1176 priv_data_len;
1177
1178 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
1179
1180 if (!wiphy)
1181 return NULL;
1182
1183 wiphy->privid = mac80211_wiphy_privid;
1184
1185 local = wiphy_priv(wiphy);
1186 local->hw.wiphy = wiphy;
1187
1188 local->hw.priv = (char *)local +
1189 ((sizeof(struct ieee80211_local) +
1190 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
1191
4480f15c
JB		 1192 BUG_ON(!ops->tx);
1193 BUG_ON(!ops->config);
1194 BUG_ON(!ops->add_interface);
f0706e82
JB		 1195 local->ops = ops;
1196
1197 /* for now, mdev needs sub_if_data :/ */
1198 mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
1199 "wmaster%d", ether_setup);
1200 if (!mdev) {
1201 wiphy_free(wiphy);
1202 return NULL;
1203 }
1204
1205 sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
1206 mdev->ieee80211_ptr = &sdata->wdev;
1207 sdata->wdev.wiphy = wiphy;
1208
1209 local->hw.queues = 1; /* default */
1210
1211 local->mdev = mdev;
1212 local->rx_pre_handlers = ieee80211_rx_pre_handlers;
1213 local->rx_handlers = ieee80211_rx_handlers;
1214 local->tx_handlers = ieee80211_tx_handlers;
1215
1216 local->bridge_packets = 1;
1217
1218 local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1219 local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1220 local->short_retry_limit = 7;
1221 local->long_retry_limit = 4;
1222 local->hw.conf.radio_enabled = 1;
f0706e82
JB		 1223
1224 local->enabled_modes = (unsigned int) -1;
1225
1226 INIT_LIST_HEAD(&local->modes_list);
1227
1228 rwlock_init(&local->sub_if_lock);
1229 INIT_LIST_HEAD(&local->sub_if_list);
1230
1231 INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
f0706e82
JB		 1232 ieee80211_rx_bss_list_init(mdev);
1233
1234 sta_info_init(local);
1235
1236 mdev->hard_start_xmit = ieee80211_master_start_xmit;
1237 mdev->open = ieee80211_master_open;
1238 mdev->stop = ieee80211_master_stop;
1239 mdev->type = ARPHRD_IEEE80211;
1240 mdev->hard_header_parse = header_parse_80211;
1241
1242 sdata->type = IEEE80211_IF_TYPE_AP;
1243 sdata->dev = mdev;
1244 sdata->local = local;
1245 sdata->u.ap.force_unicast_rateidx = -1;
1246 sdata->u.ap.max_ratectrl_rateidx = -1;
1247 ieee80211_if_sdata_init(sdata);
1248 list_add_tail(&sdata->list, &local->sub_if_list);
1249
1250 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1251 (unsigned long)local);
1252 tasklet_disable(&local->tx_pending_tasklet);
1253
1254 tasklet_init(&local->tasklet,
1255 ieee80211_tasklet_handler,
1256 (unsigned long) local);
1257 tasklet_disable(&local->tasklet);
1258
1259 skb_queue_head_init(&local->skb_queue);
1260 skb_queue_head_init(&local->skb_queue_unreliable);
1261
1262 return local_to_hw(local);
1263}
1264EXPORT_SYMBOL(ieee80211_alloc_hw);
1265
1266int ieee80211_register_hw(struct ieee80211_hw *hw)
1267{
1268 struct ieee80211_local *local = hw_to_local(hw);
1269 const char *name;
1270 int result;
1271
1272 result = wiphy_register(local->hw.wiphy);
1273 if (result < 0)
1274 return result;
1275
1276 name = wiphy_dev(local->hw.wiphy)->driver->name;
1277 local->hw.workqueue = create_singlethread_workqueue(name);
1278 if (!local->hw.workqueue) {
1279 result = -ENOMEM;
1280 goto fail_workqueue;
1281 }
1282
b306f453
JB		 1283 /*
1284 * The hardware needs headroom for sending the frame,
1285 * and we need some headroom for passing the frame to monitor
1286 * interfaces, but never both at the same time.
1287 */
33ccad35
JB		 1288 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1289 sizeof(struct ieee80211_tx_status_rtap_hdr));
b306f453 1290
e9f207f0
JB		 1291 debugfs_hw_add(local);
1292
f0706e82
JB		 1293 local->hw.conf.beacon_int = 1000;
1294
1295 local->wstats_flags |= local->hw.max_rssi ?
1296 IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID;
1297 local->wstats_flags |= local->hw.max_signal ?
1298 IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1299 local->wstats_flags |= local->hw.max_noise ?
1300 IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1301 if (local->hw.max_rssi < 0 || local->hw.max_noise < 0)
1302 local->wstats_flags |= IW_QUAL_DBM;
1303
1304 result = sta_info_start(local);
1305 if (result < 0)
1306 goto fail_sta_info;
1307
1308 rtnl_lock();
1309 result = dev_alloc_name(local->mdev, local->mdev->name);
1310 if (result < 0)
1311 goto fail_dev;
1312
1313 memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1314 SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1315
1316 result = register_netdevice(local->mdev);
1317 if (result < 0)
1318 goto fail_dev;
1319
e9f207f0
JB		 1320 ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1321
f0706e82
JB		 1322 result = ieee80211_init_rate_ctrl_alg(local, NULL);
1323 if (result < 0) {
1324 printk(KERN_DEBUG "%s: Failed to initialize rate control "
1325 "algorithm\n", local->mdev->name);
1326 goto fail_rate;
1327 }
1328
1329 result = ieee80211_wep_init(local);
1330
1331 if (result < 0) {
1332 printk(KERN_DEBUG "%s: Failed to initialize wep\n",
1333 local->mdev->name);
1334 goto fail_wep;
1335 }
1336
1337 ieee80211_install_qdisc(local->mdev);
1338
1339 /* add one default STA interface */
1340 result = ieee80211_if_add(local->mdev, "wlan%d", NULL,
1341 IEEE80211_IF_TYPE_STA);
1342 if (result)
1343 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
1344 local->mdev->name);
1345
1346 local->reg_state = IEEE80211_DEV_REGISTERED;
1347 rtnl_unlock();
1348
1349 ieee80211_led_init(local);
1350
1351 return 0;
1352
1353fail_wep:
1354 rate_control_deinitialize(local);
1355fail_rate:
e9f207f0 1356 ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
f0706e82
JB		 1357 unregister_netdevice(local->mdev);
1358fail_dev:
1359 rtnl_unlock();
1360 sta_info_stop(local);
1361fail_sta_info:
e9f207f0 1362 debugfs_hw_del(local);
f0706e82
JB		 1363 destroy_workqueue(local->hw.workqueue);
1364fail_workqueue:
1365 wiphy_unregister(local->hw.wiphy);
1366 return result;
1367}
1368EXPORT_SYMBOL(ieee80211_register_hw);
1369
1370int ieee80211_register_hwmode(struct ieee80211_hw *hw,
1371 struct ieee80211_hw_mode *mode)
1372{
1373 struct ieee80211_local *local = hw_to_local(hw);
1374 struct ieee80211_rate *rate;
1375 int i;
1376
1377 INIT_LIST_HEAD(&mode->list);
1378 list_add_tail(&mode->list, &local->modes_list);
1379
1380 local->hw_modes |= (1 << mode->mode);
1381 for (i = 0; i < mode->num_rates; i++) {
1382 rate = &(mode->rates[i]);
1383 rate->rate_inv = CHAN_UTIL_RATE_LCM / rate->rate;
1384 }
1385 ieee80211_prepare_rates(local, mode);
1386
1387 if (!local->oper_hw_mode) {
1388 /* Default to this mode */
1389 local->hw.conf.phymode = mode->mode;
1390 local->oper_hw_mode = local->scan_hw_mode = mode;
1391 local->oper_channel = local->scan_channel = &mode->channels[0];
1392 local->hw.conf.mode = local->oper_hw_mode;
1393 local->hw.conf.chan = local->oper_channel;
1394 }
1395
1396 if (!(hw->flags & IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED))
fd8bacc9 1397 ieee80211_set_default_regdomain(mode);
f0706e82
JB		 1398
1399 return 0;
1400}
1401EXPORT_SYMBOL(ieee80211_register_hwmode);
1402
1403void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1404{
1405 struct ieee80211_local *local = hw_to_local(hw);
1406 struct ieee80211_sub_if_data *sdata, *tmp;
1407 struct list_head tmp_list;
1408 int i;
1409
1410 tasklet_kill(&local->tx_pending_tasklet);
1411 tasklet_kill(&local->tasklet);
1412
1413 rtnl_lock();
1414
1415 BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED);
1416
1417 local->reg_state = IEEE80211_DEV_UNREGISTERED;
1418 if (local->apdev)
1419 ieee80211_if_del_mgmt(local);
1420
1421 write_lock_bh(&local->sub_if_lock);
1422 list_replace_init(&local->sub_if_list, &tmp_list);
1423 write_unlock_bh(&local->sub_if_lock);
1424
1425 list_for_each_entry_safe(sdata, tmp, &tmp_list, list)
1426 __ieee80211_if_del(local, sdata);
1427
1428 rtnl_unlock();
1429
f0706e82
JB		 1430 ieee80211_rx_bss_list_deinit(local->mdev);
1431 ieee80211_clear_tx_pending(local);
1432 sta_info_stop(local);
1433 rate_control_deinitialize(local);
e9f207f0 1434 debugfs_hw_del(local);
f0706e82
JB		 1435
1436 for (i = 0; i < NUM_IEEE80211_MODES; i++) {
1437 kfree(local->supp_rates[i]);
1438 kfree(local->basic_rates[i]);
1439 }
1440
1441 if (skb_queue_len(&local->skb_queue)
1442 || skb_queue_len(&local->skb_queue_unreliable))
1443 printk(KERN_WARNING "%s: skb_queue not empty\n",
1444 local->mdev->name);
1445 skb_queue_purge(&local->skb_queue);
1446 skb_queue_purge(&local->skb_queue_unreliable);
1447
1448 destroy_workqueue(local->hw.workqueue);
1449 wiphy_unregister(local->hw.wiphy);
1450 ieee80211_wep_free(local);
1451 ieee80211_led_exit(local);
1452}
1453EXPORT_SYMBOL(ieee80211_unregister_hw);
1454
1455void ieee80211_free_hw(struct ieee80211_hw *hw)
1456{
1457 struct ieee80211_local *local = hw_to_local(hw);
1458
1459 ieee80211_if_free(local->mdev);
1460 wiphy_free(local->hw.wiphy);
1461}
1462EXPORT_SYMBOL(ieee80211_free_hw);
1463
f0706e82
JB		 1464struct net_device_stats *ieee80211_dev_stats(struct net_device *dev)
1465{
1466 struct ieee80211_sub_if_data *sdata;
1467 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1468 return &sdata->stats;
1469}
1470
1471static int __init ieee80211_init(void)
1472{
1473 struct sk_buff *skb;
1474 int ret;
1475
1476 BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb));
1477
1478 ret = ieee80211_wme_register();
1479 if (ret) {
1480 printk(KERN_DEBUG "ieee80211_init: failed to "
1481 "initialize WME (err=%d)\n", ret);
1482 return ret;
1483 }
1484
e9f207f0 1485 ieee80211_debugfs_netdev_init();
fd8bacc9 1486 ieee80211_regdomain_init();
e9f207f0 1487
f0706e82
JB		 1488 return 0;
1489}
1490
f0706e82
JB		 1491static void __exit ieee80211_exit(void)
1492{
1493 ieee80211_wme_unregister();
e9f207f0 1494 ieee80211_debugfs_netdev_exit();
f0706e82
JB		 1495}
1496
1497
ca9938fe 1498subsys_initcall(ieee80211_init);
f0706e82
JB		 1499module_exit(ieee80211_exit);
1500
1501MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1502MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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