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[NET]: Support multiple network namespaces with netlink
[GitHub/mt8127/android_kernel_alcatel_ttab.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:
d6f2da5b 357 sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET;
8a69aa93
DD		 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 444 ieee80211_reset_erp_info(dev);
11a843b7 445 ieee80211_enable_keys(sdata);
d9430a32 446 }
f0706e82 447
b2c258fb
JB		 448 if (sdata->type == IEEE80211_IF_TYPE_STA &&
449 !local->user_space_mlme)
450 netif_carrier_off(dev);
451 else
452 netif_carrier_on(dev);
f0706e82 453
b2c258fb
JB		 454 netif_start_queue(dev);
455 return 0;
f0706e82 456}
f0706e82 457
b2c258fb 458static void ieee80211_if_shutdown(struct net_device *dev)
f0706e82 459{
f0706e82 460 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
b2c258fb 461 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
f0706e82 462
b2c258fb
JB		 463 ASSERT_RTNL();
464 switch (sdata->type) {
465 case IEEE80211_IF_TYPE_STA:
466 case IEEE80211_IF_TYPE_IBSS:
467 sdata->u.sta.state = IEEE80211_DISABLED;
468 del_timer_sync(&sdata->u.sta.timer);
2a8a9a88
JB		 469 /*
470 * Holding the sub_if_lock for writing here blocks
471 * out the receive path and makes sure it's not
472 * currently processing a packet that may get
473 * added to the queue.
474 */
475 write_lock_bh(&local->sub_if_lock);
b2c258fb 476 skb_queue_purge(&sdata->u.sta.skb_queue);
2a8a9a88
JB		 477 write_unlock_bh(&local->sub_if_lock);
478
b2c258fb
JB		 479 if (!local->ops->hw_scan &&
480 local->scan_dev == sdata->dev) {
481 local->sta_scanning = 0;
482 cancel_delayed_work(&local->scan_work);
483 }
484 flush_workqueue(local->hw.workqueue);
485 break;
f0706e82 486 }
f0706e82
JB		 487}
488
b2c258fb 489static int ieee80211_stop(struct net_device *dev)
f0706e82 490{
b2c258fb 491 struct ieee80211_sub_if_data *sdata;
f0706e82 492 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
f0706e82 493
b2c258fb 494 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
f0706e82 495
b2c258fb
JB		 496 if (sdata->type == IEEE80211_IF_TYPE_MNTR &&
497 local->open_count > 1 &&
498 !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
499 /* remove "soft monitor" interface */
500 local->open_count--;
501 local->monitors--;
502 if (!local->monitors)
503 local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
504 return 0;
f0706e82
JB		 505 }
506
b2c258fb
JB		 507 netif_stop_queue(dev);
508 ieee80211_if_shutdown(dev);
f0706e82 509
b2c258fb
JB		 510 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
511 local->monitors--;
512 if (!local->monitors)
513 local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
11a843b7
JB		 514 } else {
515 /* disable all keys for as long as this netdev is down */
516 ieee80211_disable_keys(sdata);
f0706e82
JB		 517 }
518
b2c258fb
JB		 519 local->open_count--;
520 if (local->open_count == 0) {
521 if (netif_running(local->mdev))
522 dev_close(local->mdev);
523 if (local->apdev)
524 dev_close(local->apdev);
525 if (local->ops->stop)
526 local->ops->stop(local_to_hw(local));
527 tasklet_disable(&local->tx_pending_tasklet);
528 tasklet_disable(&local->tasklet);
529 }
530 if (local->ops->remove_interface) {
531 struct ieee80211_if_init_conf conf;
f0706e82 532
b2c258fb
JB		 533 conf.if_id = dev->ifindex;
534 conf.type = sdata->type;
535 conf.mac_addr = dev->dev_addr;
536 local->ops->remove_interface(local_to_hw(local), &conf);
f0706e82
JB		 537 }
538
b2c258fb
JB		 539 ieee80211_start_hard_monitor(local);
540
f0706e82
JB		 541 return 0;
542}
543
544enum netif_tx_lock_class {
545 TX_LOCK_NORMAL,
546 TX_LOCK_MASTER,
547};
548
549static inline void netif_tx_lock_nested(struct net_device *dev, int subclass)
550{
551 spin_lock_nested(&dev->_xmit_lock, subclass);
552 dev->xmit_lock_owner = smp_processor_id();
553}
554
555static void ieee80211_set_multicast_list(struct net_device *dev)
556{
557 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
558 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
559 unsigned short flags;
560
561 netif_tx_lock_nested(local->mdev, TX_LOCK_MASTER);
13262ffd
JS		 562 if (((dev->flags & IFF_ALLMULTI) != 0) ^
563 ((sdata->flags & IEEE80211_SDATA_ALLMULTI) != 0)) {
564 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
f0706e82 565 local->iff_allmultis--;
13262ffd 566 else
f0706e82 567 local->iff_allmultis++;
13262ffd 568 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
f0706e82 569 }
13262ffd
JS		 570 if (((dev->flags & IFF_PROMISC) != 0) ^
571 ((sdata->flags & IEEE80211_SDATA_PROMISC) != 0)) {
572 if (sdata->flags & IEEE80211_SDATA_PROMISC)
f0706e82 573 local->iff_promiscs--;
13262ffd 574 else
f0706e82 575 local->iff_promiscs++;
13262ffd 576 sdata->flags ^= IEEE80211_SDATA_PROMISC;
f0706e82
JB		 577 }
578 if (dev->mc_count != sdata->mc_count) {
579 local->mc_count = local->mc_count - sdata->mc_count +
580 dev->mc_count;
581 sdata->mc_count = dev->mc_count;
582 }
583 if (local->ops->set_multicast_list) {
584 flags = local->mdev->flags;
585 if (local->iff_allmultis)
586 flags |= IFF_ALLMULTI;
587 if (local->iff_promiscs)
588 flags |= IFF_PROMISC;
589 read_lock(&local->sub_if_lock);
590 local->ops->set_multicast_list(local_to_hw(local), flags,
591 local->mc_count);
592 read_unlock(&local->sub_if_lock);
593 }
594 netif_tx_unlock(local->mdev);
595}
596
b2c258fb
JB		 597/* Must not be called for mdev and apdev */
598void ieee80211_if_setup(struct net_device *dev)
f0706e82 599{
b2c258fb
JB		 600 ether_setup(dev);
601 dev->hard_start_xmit = ieee80211_subif_start_xmit;
602 dev->wireless_handlers = &ieee80211_iw_handler_def;
603 dev->set_multicast_list = ieee80211_set_multicast_list;
604 dev->change_mtu = ieee80211_change_mtu;
605 dev->get_stats = ieee80211_get_stats;
606 dev->open = ieee80211_open;
607 dev->stop = ieee80211_stop;
608 dev->uninit = ieee80211_if_reinit;
609 dev->destructor = ieee80211_if_free;
610}
f0706e82 611
b2c258fb
JB		 612/* WDS specialties */
613
614int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr)
615{
616 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
617 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
618 struct sta_info *sta;
619
620 if (compare_ether_addr(remote_addr, sdata->u.wds.remote_addr) == 0)
621 return 0;
622
623 /* Create STA entry for the new peer */
624 sta = sta_info_add(local, dev, remote_addr, GFP_KERNEL);
625 if (!sta)
626 return -ENOMEM;
627 sta_info_put(sta);
628
629 /* Remove STA entry for the old peer */
630 sta = sta_info_get(local, sdata->u.wds.remote_addr);
631 if (sta) {
be8755e1 632 sta_info_free(sta);
b2c258fb 633 sta_info_put(sta);
b2c258fb
JB		 634 } else {
635 printk(KERN_DEBUG "%s: could not find STA entry for WDS link "
636 "peer " MAC_FMT "\n",
637 dev->name, MAC_ARG(sdata->u.wds.remote_addr));
638 }
639
640 /* Update WDS link data */
641 memcpy(&sdata->u.wds.remote_addr, remote_addr, ETH_ALEN);
642
643 return 0;
f0706e82 644}
f0706e82 645
b2c258fb
JB		 646/* everything else */
647
b2c258fb
JB		 648static int __ieee80211_if_config(struct net_device *dev,
649 struct sk_buff *beacon,
650 struct ieee80211_tx_control *control)
651{
652 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
653 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
654 struct ieee80211_if_conf conf;
655 static u8 scan_bssid[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
656
657 if (!local->ops->config_interface || !netif_running(dev))
f0706e82 658 return 0;
f0706e82 659
b2c258fb 660 memset(&conf, 0, sizeof(conf));
4480f15c 661 conf.type = sdata->type;
b2c258fb
JB		 662 if (sdata->type == IEEE80211_IF_TYPE_STA ||
663 sdata->type == IEEE80211_IF_TYPE_IBSS) {
664 if (local->sta_scanning &&
665 local->scan_dev == dev)
666 conf.bssid = scan_bssid;
667 else
668 conf.bssid = sdata->u.sta.bssid;
669 conf.ssid = sdata->u.sta.ssid;
670 conf.ssid_len = sdata->u.sta.ssid_len;
671 conf.generic_elem = sdata->u.sta.extra_ie;
672 conf.generic_elem_len = sdata->u.sta.extra_ie_len;
673 } else if (sdata->type == IEEE80211_IF_TYPE_AP) {
674 conf.ssid = sdata->u.ap.ssid;
675 conf.ssid_len = sdata->u.ap.ssid_len;
676 conf.generic_elem = sdata->u.ap.generic_elem;
677 conf.generic_elem_len = sdata->u.ap.generic_elem_len;
678 conf.beacon = beacon;
679 conf.beacon_control = control;
f0706e82 680 }
b2c258fb
JB		 681 return local->ops->config_interface(local_to_hw(local),
682 dev->ifindex, &conf);
f0706e82
JB		 683}
684
b2c258fb
JB		 685int ieee80211_if_config(struct net_device *dev)
686{
687 return __ieee80211_if_config(dev, NULL, NULL);
688}
f0706e82 689
b2c258fb 690int ieee80211_if_config_beacon(struct net_device *dev)
f0706e82 691{
f0706e82 692 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
b2c258fb
JB		 693 struct ieee80211_tx_control control;
694 struct sk_buff *skb;
f0706e82 695
b2c258fb 696 if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
f0706e82 697 return 0;
b2c258fb
JB		 698 skb = ieee80211_beacon_get(local_to_hw(local), dev->ifindex, &control);
699 if (!skb)
700 return -ENOMEM;
701 return __ieee80211_if_config(dev, skb, &control);
702}
f0706e82 703
b2c258fb
JB		 704int ieee80211_hw_config(struct ieee80211_local *local)
705{
706 struct ieee80211_hw_mode *mode;
707 struct ieee80211_channel *chan;
708 int ret = 0;
f0706e82 709
b2c258fb
JB		 710 if (local->sta_scanning) {
711 chan = local->scan_channel;
712 mode = local->scan_hw_mode;
713 } else {
714 chan = local->oper_channel;
715 mode = local->oper_hw_mode;
f0706e82
JB		 716 }
717
b2c258fb
JB		 718 local->hw.conf.channel = chan->chan;
719 local->hw.conf.channel_val = chan->val;
720 local->hw.conf.power_level = chan->power_level;
721 local->hw.conf.freq = chan->freq;
722 local->hw.conf.phymode = mode->mode;
723 local->hw.conf.antenna_max = chan->antenna_max;
724 local->hw.conf.chan = chan;
725 local->hw.conf.mode = mode;
f0706e82 726
b2c258fb
JB		 727#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
728 printk(KERN_DEBUG "HW CONFIG: channel=%d freq=%d "
729 "phymode=%d\n", local->hw.conf.channel, local->hw.conf.freq,
730 local->hw.conf.phymode);
731#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
732
733 if (local->ops->config)
734 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
f0706e82 735
b2c258fb
JB		 736 return ret;
737}
f0706e82 738
d9430a32
DD		 739void ieee80211_erp_info_change_notify(struct net_device *dev, u8 changes)
740{
741 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
742 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
743 if (local->ops->erp_ie_changed)
744 local->ops->erp_ie_changed(local_to_hw(local), changes,
13262ffd
JS		 745 !!(sdata->flags & IEEE80211_SDATA_USE_PROTECTION),
746 !(sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE));
d9430a32
DD		 747}
748
749void ieee80211_reset_erp_info(struct net_device *dev)
750{
751 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
752
13262ffd
JS		 753 sdata->flags &= ~(IEEE80211_SDATA_USE_PROTECTION |
754 IEEE80211_SDATA_SHORT_PREAMBLE);
d9430a32
DD		 755 ieee80211_erp_info_change_notify(dev,
756 IEEE80211_ERP_CHANGE_PROTECTION |
757 IEEE80211_ERP_CHANGE_PREAMBLE);
758}
759
b2c258fb
JB		 760struct dev_mc_list *ieee80211_get_mc_list_item(struct ieee80211_hw *hw,
761 struct dev_mc_list *prev,
762 void **ptr)
f0706e82 763{
b2c258fb
JB		 764 struct ieee80211_local *local = hw_to_local(hw);
765 struct ieee80211_sub_if_data *sdata = *ptr;
766 struct dev_mc_list *mc;
767
768 if (!prev) {
769 WARN_ON(sdata);
770 sdata = NULL;
771 }
772 if (!prev || !prev->next) {
773 if (sdata)
774 sdata = list_entry(sdata->list.next,
775 struct ieee80211_sub_if_data, list);
776 else
777 sdata = list_entry(local->sub_if_list.next,
778 struct ieee80211_sub_if_data, list);
779 if (&sdata->list != &local->sub_if_list)
780 mc = sdata->dev->mc_list;
781 else
782 mc = NULL;
783 } else
784 mc = prev->next;
785
786 *ptr = sdata;
787 return mc;
f0706e82 788}
b2c258fb 789EXPORT_SYMBOL(ieee80211_get_mc_list_item);
f0706e82 790
f0706e82
JB		 791void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
792 struct sk_buff *skb,
793 struct ieee80211_tx_status *status)
794{
795 struct ieee80211_local *local = hw_to_local(hw);
796 struct ieee80211_tx_status *saved;
797 int tmp;
798
799 skb->dev = local->mdev;
800 saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC);
801 if (unlikely(!saved)) {
802 if (net_ratelimit())
803 printk(KERN_WARNING "%s: Not enough memory, "
804 "dropping tx status", skb->dev->name);
805 /* should be dev_kfree_skb_irq, but due to this function being
806 * named _irqsafe instead of just _irq we can't be sure that
807 * people won't call it from non-irq contexts */
808 dev_kfree_skb_any(skb);
809 return;
810 }
811 memcpy(saved, status, sizeof(struct ieee80211_tx_status));
812 /* copy pointer to saved status into skb->cb for use by tasklet */
813 memcpy(skb->cb, &saved, sizeof(saved));
814
815 skb->pkt_type = IEEE80211_TX_STATUS_MSG;
816 skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ?
817 &local->skb_queue : &local->skb_queue_unreliable, skb);
818 tmp = skb_queue_len(&local->skb_queue) +
819 skb_queue_len(&local->skb_queue_unreliable);
820 while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
821 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
822 memcpy(&saved, skb->cb, sizeof(saved));
823 kfree(saved);
824 dev_kfree_skb_irq(skb);
825 tmp--;
826 I802_DEBUG_INC(local->tx_status_drop);
827 }
828 tasklet_schedule(&local->tasklet);
829}
830EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
831
832static void ieee80211_tasklet_handler(unsigned long data)
833{
834 struct ieee80211_local *local = (struct ieee80211_local *) data;
835 struct sk_buff *skb;
836 struct ieee80211_rx_status rx_status;
837 struct ieee80211_tx_status *tx_status;
838
839 while ((skb = skb_dequeue(&local->skb_queue)) ||
840 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
841 switch (skb->pkt_type) {
842 case IEEE80211_RX_MSG:
843 /* status is in skb->cb */
844 memcpy(&rx_status, skb->cb, sizeof(rx_status));
845 /* Clear skb->type in order to not confuse kernel
846 * netstack. */
847 skb->pkt_type = 0;
848 __ieee80211_rx(local_to_hw(local), skb, &rx_status);
849 break;
850 case IEEE80211_TX_STATUS_MSG:
851 /* get pointer to saved status out of skb->cb */
852 memcpy(&tx_status, skb->cb, sizeof(tx_status));
853 skb->pkt_type = 0;
854 ieee80211_tx_status(local_to_hw(local),
855 skb, tx_status);
856 kfree(tx_status);
857 break;
858 default: /* should never get here! */
859 printk(KERN_ERR "%s: Unknown message type (%d)\n",
860 local->mdev->name, skb->pkt_type);
861 dev_kfree_skb(skb);
862 break;
863 }
864 }
865}
866
f0706e82
JB		 867/* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
868 * make a prepared TX frame (one that has been given to hw) to look like brand
869 * new IEEE 802.11 frame that is ready to go through TX processing again.
870 * Also, tx_packet_data in cb is restored from tx_control. */
871static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
872 struct ieee80211_key *key,
873 struct sk_buff *skb,
874 struct ieee80211_tx_control *control)
875{
876 int hdrlen, iv_len, mic_len;
877 struct ieee80211_tx_packet_data *pkt_data;
878
879 pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
880 pkt_data->ifindex = control->ifindex;
e8bf9649
JS		 881 pkt_data->flags = 0;
882 if (control->flags & IEEE80211_TXCTL_REQ_TX_STATUS)
883 pkt_data->flags |= IEEE80211_TXPD_REQ_TX_STATUS;
884 if (control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT)
885 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
886 if (control->flags & IEEE80211_TXCTL_REQUEUE)
887 pkt_data->flags |= IEEE80211_TXPD_REQUEUE;
888 if (control->type == IEEE80211_IF_TYPE_MGMT)
889 pkt_data->flags |= IEEE80211_TXPD_MGMT_IFACE;
f0706e82
JB		 890 pkt_data->queue = control->queue;
891
892 hdrlen = ieee80211_get_hdrlen_from_skb(skb);
893
894 if (!key)
895 goto no_key;
896
8f20fc24 897 switch (key->conf.alg) {
f0706e82
JB		 898 case ALG_WEP:
899 iv_len = WEP_IV_LEN;
900 mic_len = WEP_ICV_LEN;
901 break;
902 case ALG_TKIP:
903 iv_len = TKIP_IV_LEN;
904 mic_len = TKIP_ICV_LEN;
905 break;
906 case ALG_CCMP:
907 iv_len = CCMP_HDR_LEN;
908 mic_len = CCMP_MIC_LEN;
909 break;
910 default:
911 goto no_key;
912 }
913
8f20fc24 914 if (skb->len >= mic_len &&
11a843b7 915 !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
f0706e82
JB		 916 skb_trim(skb, skb->len - mic_len);
917 if (skb->len >= iv_len && skb->len > hdrlen) {
918 memmove(skb->data + iv_len, skb->data, hdrlen);
919 skb_pull(skb, iv_len);
920 }
921
922no_key:
923 {
924 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
925 u16 fc = le16_to_cpu(hdr->frame_control);
926 if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
927 fc &= ~IEEE80211_STYPE_QOS_DATA;
928 hdr->frame_control = cpu_to_le16(fc);
929 memmove(skb->data + 2, skb->data, hdrlen - 2);
930 skb_pull(skb, 2);
931 }
932 }
933}
934
f0706e82
JB		 935void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
936 struct ieee80211_tx_status *status)
937{
938 struct sk_buff *skb2;
939 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
940 struct ieee80211_local *local = hw_to_local(hw);
941 u16 frag, type;
942 u32 msg_type;
b306f453
JB		 943 struct ieee80211_tx_status_rtap_hdr *rthdr;
944 struct ieee80211_sub_if_data *sdata;
945 int monitors;
f0706e82
JB		 946
947 if (!status) {
948 printk(KERN_ERR
949 "%s: ieee80211_tx_status called with NULL status\n",
950 local->mdev->name);
951 dev_kfree_skb(skb);
952 return;
953 }
954
955 if (status->excessive_retries) {
956 struct sta_info *sta;
957 sta = sta_info_get(local, hdr->addr1);
958 if (sta) {
959 if (sta->flags & WLAN_STA_PS) {
960 /* The STA is in power save mode, so assume
961 * that this TX packet failed because of that.
962 */
963 status->excessive_retries = 0;
964 status->flags |= IEEE80211_TX_STATUS_TX_FILTERED;
965 }
966 sta_info_put(sta);
967 }
968 }
969
970 if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) {
971 struct sta_info *sta;
972 sta = sta_info_get(local, hdr->addr1);
973 if (sta) {
974 sta->tx_filtered_count++;
975
976 /* Clear the TX filter mask for this STA when sending
977 * the next packet. If the STA went to power save mode,
978 * this will happen when it is waking up for the next
979 * time. */
980 sta->clear_dst_mask = 1;
981
982 /* TODO: Is the WLAN_STA_PS flag always set here or is
983 * the race between RX and TX status causing some
984 * packets to be filtered out before 80211.o gets an
985 * update for PS status? This seems to be the case, so
986 * no changes are likely to be needed. */
987 if (sta->flags & WLAN_STA_PS &&
988 skb_queue_len(&sta->tx_filtered) <
989 STA_MAX_TX_BUFFER) {
990 ieee80211_remove_tx_extra(local, sta->key,
991 skb,
992 &status->control);
993 skb_queue_tail(&sta->tx_filtered, skb);
994 } else if (!(sta->flags & WLAN_STA_PS) &&
995 !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) {
996 /* Software retry the packet once */
997 status->control.flags |= IEEE80211_TXCTL_REQUEUE;
998 ieee80211_remove_tx_extra(local, sta->key,
999 skb,
1000 &status->control);
1001 dev_queue_xmit(skb);
1002 } else {
1003 if (net_ratelimit()) {
1004 printk(KERN_DEBUG "%s: dropped TX "
1005 "filtered frame queue_len=%d "
1006 "PS=%d @%lu\n",
1007 local->mdev->name,
1008 skb_queue_len(
1009 &sta->tx_filtered),
1010 !!(sta->flags & WLAN_STA_PS),
1011 jiffies);
1012 }
1013 dev_kfree_skb(skb);
1014 }
1015 sta_info_put(sta);
1016 return;
1017 }
1018 } else {
1019 /* FIXME: STUPID to call this with both local and local->mdev */
1020 rate_control_tx_status(local, local->mdev, skb, status);
1021 }
1022
1023 ieee80211_led_tx(local, 0);
1024
1025 /* SNMP counters
1026 * Fragments are passed to low-level drivers as separate skbs, so these
1027 * are actually fragments, not frames. Update frame counters only for
1028 * the first fragment of the frame. */
1029
1030 frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
1031 type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
1032
1033 if (status->flags & IEEE80211_TX_STATUS_ACK) {
1034 if (frag == 0) {
1035 local->dot11TransmittedFrameCount++;
1036 if (is_multicast_ether_addr(hdr->addr1))
1037 local->dot11MulticastTransmittedFrameCount++;
1038 if (status->retry_count > 0)
1039 local->dot11RetryCount++;
1040 if (status->retry_count > 1)
1041 local->dot11MultipleRetryCount++;
1042 }
1043
1044 /* This counter shall be incremented for an acknowledged MPDU
1045 * with an individual address in the address 1 field or an MPDU
1046 * with a multicast address in the address 1 field of type Data
1047 * or Management. */
1048 if (!is_multicast_ether_addr(hdr->addr1) ||
1049 type == IEEE80211_FTYPE_DATA ||
1050 type == IEEE80211_FTYPE_MGMT)
1051 local->dot11TransmittedFragmentCount++;
1052 } else {
1053 if (frag == 0)
1054 local->dot11FailedCount++;
1055 }
1056
b306f453
JB		 1057 msg_type = (status->flags & IEEE80211_TX_STATUS_ACK) ?
1058 ieee80211_msg_tx_callback_ack : ieee80211_msg_tx_callback_fail;
1059
1060 /* this was a transmitted frame, but now we want to reuse it */
1061 skb_orphan(skb);
1062
1063 if ((status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS) &&
1064 local->apdev) {
1065 if (local->monitors) {
1066 skb2 = skb_clone(skb, GFP_ATOMIC);
1067 } else {
1068 skb2 = skb;
1069 skb = NULL;
1070 }
1071
1072 if (skb2)
1073 /* Send frame to hostapd */
1074 ieee80211_rx_mgmt(local, skb2, NULL, msg_type);
1075
1076 if (!skb)
1077 return;
1078 }
1079
1080 if (!local->monitors) {
f0706e82
JB		 1081 dev_kfree_skb(skb);
1082 return;
1083 }
1084
b306f453 1085 /* send frame to monitor interfaces now */
f0706e82 1086
b306f453
JB		 1087 if (skb_headroom(skb) < sizeof(*rthdr)) {
1088 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
f0706e82
JB		 1089 dev_kfree_skb(skb);
1090 return;
1091 }
f0706e82 1092
b306f453
JB		 1093 rthdr = (struct ieee80211_tx_status_rtap_hdr*)
1094 skb_push(skb, sizeof(*rthdr));
1095
1096 memset(rthdr, 0, sizeof(*rthdr));
1097 rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
1098 rthdr->hdr.it_present =
1099 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
1100 (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
1101
1102 if (!(status->flags & IEEE80211_TX_STATUS_ACK) &&
1103 !is_multicast_ether_addr(hdr->addr1))
1104 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
1105
1106 if ((status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) &&
1107 (status->control.flags & IEEE80211_TXCTL_USE_CTS_PROTECT))
1108 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
1109 else if (status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS)
1110 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
1111
1112 rthdr->data_retries = status->retry_count;
1113
1114 read_lock(&local->sub_if_lock);
1115 monitors = local->monitors;
1116 list_for_each_entry(sdata, &local->sub_if_list, list) {
1117 /*
1118 * Using the monitors counter is possibly racy, but
1119 * if the value is wrong we simply either clone the skb
1120 * once too much or forget sending it to one monitor iface
1121 * The latter case isn't nice but fixing the race is much
1122 * more complicated.
1123 */
1124 if (!monitors || !skb)
1125 goto out;
1126
1127 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
1128 if (!netif_running(sdata->dev))
1129 continue;
1130 monitors--;
1131 if (monitors)
1132 skb2 = skb_clone(skb, GFP_KERNEL);
1133 else
1134 skb2 = NULL;
1135 skb->dev = sdata->dev;
1136 /* XXX: is this sufficient for BPF? */
1137 skb_set_mac_header(skb, 0);
1138 skb->ip_summed = CHECKSUM_UNNECESSARY;
1139 skb->pkt_type = PACKET_OTHERHOST;
1140 skb->protocol = htons(ETH_P_802_2);
1141 memset(skb->cb, 0, sizeof(skb->cb));
1142 netif_rx(skb);
1143 skb = skb2;
b306f453
JB		 1144 }
1145 }
1146 out:
1147 read_unlock(&local->sub_if_lock);
1148 if (skb)
1149 dev_kfree_skb(skb);
f0706e82
JB		 1150}
1151EXPORT_SYMBOL(ieee80211_tx_status);
1152
f0706e82
JB		 1153struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
1154 const struct ieee80211_ops *ops)
1155{
1156 struct net_device *mdev;
1157 struct ieee80211_local *local;
1158 struct ieee80211_sub_if_data *sdata;
1159 int priv_size;
1160 struct wiphy *wiphy;
1161
1162 /* Ensure 32-byte alignment of our private data and hw private data.
1163 * We use the wiphy priv data for both our ieee80211_local and for
1164 * the driver's private data
1165 *
1166 * In memory it'll be like this:
1167 *
1168 * +-------------------------+
1169 * | struct wiphy |
1170 * +-------------------------+
1171 * | struct ieee80211_local |
1172 * +-------------------------+
1173 * | driver's private data |
1174 * +-------------------------+
1175 *
1176 */
1177 priv_size = ((sizeof(struct ieee80211_local) +
1178 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
1179 priv_data_len;
1180
1181 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
1182
1183 if (!wiphy)
1184 return NULL;
1185
1186 wiphy->privid = mac80211_wiphy_privid;
1187
1188 local = wiphy_priv(wiphy);
1189 local->hw.wiphy = wiphy;
1190
1191 local->hw.priv = (char *)local +
1192 ((sizeof(struct ieee80211_local) +
1193 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
1194
4480f15c
JB		 1195 BUG_ON(!ops->tx);
1196 BUG_ON(!ops->config);
1197 BUG_ON(!ops->add_interface);
f0706e82
JB		 1198 local->ops = ops;
1199
1200 /* for now, mdev needs sub_if_data :/ */
1201 mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
1202 "wmaster%d", ether_setup);
1203 if (!mdev) {
1204 wiphy_free(wiphy);
1205 return NULL;
1206 }
1207
1208 sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
1209 mdev->ieee80211_ptr = &sdata->wdev;
1210 sdata->wdev.wiphy = wiphy;
1211
1212 local->hw.queues = 1; /* default */
1213
1214 local->mdev = mdev;
1215 local->rx_pre_handlers = ieee80211_rx_pre_handlers;
1216 local->rx_handlers = ieee80211_rx_handlers;
1217 local->tx_handlers = ieee80211_tx_handlers;
1218
1219 local->bridge_packets = 1;
1220
1221 local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1222 local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1223 local->short_retry_limit = 7;
1224 local->long_retry_limit = 4;
1225 local->hw.conf.radio_enabled = 1;
f0706e82
JB		 1226
1227 local->enabled_modes = (unsigned int) -1;
1228
1229 INIT_LIST_HEAD(&local->modes_list);
1230
1231 rwlock_init(&local->sub_if_lock);
1232 INIT_LIST_HEAD(&local->sub_if_list);
1233
1234 INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
f0706e82
JB		 1235 ieee80211_rx_bss_list_init(mdev);
1236
1237 sta_info_init(local);
1238
1239 mdev->hard_start_xmit = ieee80211_master_start_xmit;
1240 mdev->open = ieee80211_master_open;
1241 mdev->stop = ieee80211_master_stop;
1242 mdev->type = ARPHRD_IEEE80211;
1243 mdev->hard_header_parse = header_parse_80211;
1244
1245 sdata->type = IEEE80211_IF_TYPE_AP;
1246 sdata->dev = mdev;
1247 sdata->local = local;
1248 sdata->u.ap.force_unicast_rateidx = -1;
1249 sdata->u.ap.max_ratectrl_rateidx = -1;
1250 ieee80211_if_sdata_init(sdata);
1251 list_add_tail(&sdata->list, &local->sub_if_list);
1252
1253 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1254 (unsigned long)local);
1255 tasklet_disable(&local->tx_pending_tasklet);
1256
1257 tasklet_init(&local->tasklet,
1258 ieee80211_tasklet_handler,
1259 (unsigned long) local);
1260 tasklet_disable(&local->tasklet);
1261
1262 skb_queue_head_init(&local->skb_queue);
1263 skb_queue_head_init(&local->skb_queue_unreliable);
1264
1265 return local_to_hw(local);
1266}
1267EXPORT_SYMBOL(ieee80211_alloc_hw);
1268
1269int ieee80211_register_hw(struct ieee80211_hw *hw)
1270{
1271 struct ieee80211_local *local = hw_to_local(hw);
1272 const char *name;
1273 int result;
1274
1275 result = wiphy_register(local->hw.wiphy);
1276 if (result < 0)
1277 return result;
1278
1279 name = wiphy_dev(local->hw.wiphy)->driver->name;
1280 local->hw.workqueue = create_singlethread_workqueue(name);
1281 if (!local->hw.workqueue) {
1282 result = -ENOMEM;
1283 goto fail_workqueue;
1284 }
1285
b306f453
JB		 1286 /*
1287 * The hardware needs headroom for sending the frame,
1288 * and we need some headroom for passing the frame to monitor
1289 * interfaces, but never both at the same time.
1290 */
33ccad35
JB		 1291 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1292 sizeof(struct ieee80211_tx_status_rtap_hdr));
b306f453 1293
e9f207f0
JB		 1294 debugfs_hw_add(local);
1295
f0706e82
JB		 1296 local->hw.conf.beacon_int = 1000;
1297
1298 local->wstats_flags |= local->hw.max_rssi ?
1299 IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID;
1300 local->wstats_flags |= local->hw.max_signal ?
1301 IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1302 local->wstats_flags |= local->hw.max_noise ?
1303 IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1304 if (local->hw.max_rssi < 0 || local->hw.max_noise < 0)
1305 local->wstats_flags |= IW_QUAL_DBM;
1306
1307 result = sta_info_start(local);
1308 if (result < 0)
1309 goto fail_sta_info;
1310
1311 rtnl_lock();
1312 result = dev_alloc_name(local->mdev, local->mdev->name);
1313 if (result < 0)
1314 goto fail_dev;
1315
1316 memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1317 SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1318
1319 result = register_netdevice(local->mdev);
1320 if (result < 0)
1321 goto fail_dev;
1322
e9f207f0
JB		 1323 ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1324
f0706e82
JB		 1325 result = ieee80211_init_rate_ctrl_alg(local, NULL);
1326 if (result < 0) {
1327 printk(KERN_DEBUG "%s: Failed to initialize rate control "
1328 "algorithm\n", local->mdev->name);
1329 goto fail_rate;
1330 }
1331
1332 result = ieee80211_wep_init(local);
1333
1334 if (result < 0) {
1335 printk(KERN_DEBUG "%s: Failed to initialize wep\n",
1336 local->mdev->name);
1337 goto fail_wep;
1338 }
1339
1340 ieee80211_install_qdisc(local->mdev);
1341
1342 /* add one default STA interface */
1343 result = ieee80211_if_add(local->mdev, "wlan%d", NULL,
1344 IEEE80211_IF_TYPE_STA);
1345 if (result)
1346 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
1347 local->mdev->name);
1348
1349 local->reg_state = IEEE80211_DEV_REGISTERED;
1350 rtnl_unlock();
1351
1352 ieee80211_led_init(local);
1353
1354 return 0;
1355
1356fail_wep:
1357 rate_control_deinitialize(local);
1358fail_rate:
e9f207f0 1359 ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
f0706e82
JB		 1360 unregister_netdevice(local->mdev);
1361fail_dev:
1362 rtnl_unlock();
1363 sta_info_stop(local);
1364fail_sta_info:
e9f207f0 1365 debugfs_hw_del(local);
f0706e82
JB		 1366 destroy_workqueue(local->hw.workqueue);
1367fail_workqueue:
1368 wiphy_unregister(local->hw.wiphy);
1369 return result;
1370}
1371EXPORT_SYMBOL(ieee80211_register_hw);
1372
1373int ieee80211_register_hwmode(struct ieee80211_hw *hw,
1374 struct ieee80211_hw_mode *mode)
1375{
1376 struct ieee80211_local *local = hw_to_local(hw);
1377 struct ieee80211_rate *rate;
1378 int i;
1379
1380 INIT_LIST_HEAD(&mode->list);
1381 list_add_tail(&mode->list, &local->modes_list);
1382
1383 local->hw_modes |= (1 << mode->mode);
1384 for (i = 0; i < mode->num_rates; i++) {
1385 rate = &(mode->rates[i]);
1386 rate->rate_inv = CHAN_UTIL_RATE_LCM / rate->rate;
1387 }
1388 ieee80211_prepare_rates(local, mode);
1389
1390 if (!local->oper_hw_mode) {
1391 /* Default to this mode */
1392 local->hw.conf.phymode = mode->mode;
1393 local->oper_hw_mode = local->scan_hw_mode = mode;
1394 local->oper_channel = local->scan_channel = &mode->channels[0];
1395 local->hw.conf.mode = local->oper_hw_mode;
1396 local->hw.conf.chan = local->oper_channel;
1397 }
1398
1399 if (!(hw->flags & IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED))
fd8bacc9 1400 ieee80211_set_default_regdomain(mode);
f0706e82
JB		 1401
1402 return 0;
1403}
1404EXPORT_SYMBOL(ieee80211_register_hwmode);
1405
1406void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1407{
1408 struct ieee80211_local *local = hw_to_local(hw);
1409 struct ieee80211_sub_if_data *sdata, *tmp;
1410 struct list_head tmp_list;
1411 int i;
1412
1413 tasklet_kill(&local->tx_pending_tasklet);
1414 tasklet_kill(&local->tasklet);
1415
1416 rtnl_lock();
1417
1418 BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED);
1419
1420 local->reg_state = IEEE80211_DEV_UNREGISTERED;
1421 if (local->apdev)
1422 ieee80211_if_del_mgmt(local);
1423
1424 write_lock_bh(&local->sub_if_lock);
1425 list_replace_init(&local->sub_if_list, &tmp_list);
1426 write_unlock_bh(&local->sub_if_lock);
1427
1428 list_for_each_entry_safe(sdata, tmp, &tmp_list, list)
1429 __ieee80211_if_del(local, sdata);
1430
1431 rtnl_unlock();
1432
f0706e82
JB		 1433 ieee80211_rx_bss_list_deinit(local->mdev);
1434 ieee80211_clear_tx_pending(local);
1435 sta_info_stop(local);
1436 rate_control_deinitialize(local);
e9f207f0 1437 debugfs_hw_del(local);
f0706e82
JB		 1438
1439 for (i = 0; i < NUM_IEEE80211_MODES; i++) {
1440 kfree(local->supp_rates[i]);
1441 kfree(local->basic_rates[i]);
1442 }
1443
1444 if (skb_queue_len(&local->skb_queue)
1445 || skb_queue_len(&local->skb_queue_unreliable))
1446 printk(KERN_WARNING "%s: skb_queue not empty\n",
1447 local->mdev->name);
1448 skb_queue_purge(&local->skb_queue);
1449 skb_queue_purge(&local->skb_queue_unreliable);
1450
1451 destroy_workqueue(local->hw.workqueue);
1452 wiphy_unregister(local->hw.wiphy);
1453 ieee80211_wep_free(local);
1454 ieee80211_led_exit(local);
1455}
1456EXPORT_SYMBOL(ieee80211_unregister_hw);
1457
1458void ieee80211_free_hw(struct ieee80211_hw *hw)
1459{
1460 struct ieee80211_local *local = hw_to_local(hw);
1461
1462 ieee80211_if_free(local->mdev);
1463 wiphy_free(local->hw.wiphy);
1464}
1465EXPORT_SYMBOL(ieee80211_free_hw);
1466
f0706e82
JB		 1467struct net_device_stats *ieee80211_dev_stats(struct net_device *dev)
1468{
1469 struct ieee80211_sub_if_data *sdata;
1470 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1471 return &sdata->stats;
1472}
1473
1474static int __init ieee80211_init(void)
1475{
1476 struct sk_buff *skb;
1477 int ret;
1478
1479 BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb));
1480
1481 ret = ieee80211_wme_register();
1482 if (ret) {
1483 printk(KERN_DEBUG "ieee80211_init: failed to "
1484 "initialize WME (err=%d)\n", ret);
1485 return ret;
1486 }
1487
e9f207f0 1488 ieee80211_debugfs_netdev_init();
fd8bacc9 1489 ieee80211_regdomain_init();
e9f207f0 1490
f0706e82
JB		 1491 return 0;
1492}
1493
f0706e82
JB		 1494static void __exit ieee80211_exit(void)
1495{
1496 ieee80211_wme_unregister();
e9f207f0 1497 ieee80211_debugfs_netdev_exit();
f0706e82
JB		 1498}
1499
1500
ca9938fe 1501subsys_initcall(ieee80211_init);
f0706e82
JB		 1502module_exit(ieee80211_exit);
1503
1504MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1505MODULE_LICENSE("GPL");
kernel source for telekom puls (alcatel/mediatek)