2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
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.
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>
23 #include <linux/bitmap.h>
24 #include <net/net_namespace.h>
25 #include <net/cfg80211.h>
27 #include "ieee80211_i.h"
28 #include "ieee80211_rate.h"
32 #include "ieee80211_led.h"
35 #include "debugfs_netdev.h"
38 * For seeing transmitted packets on monitor interfaces
39 * we have a radiotap header too.
41 struct ieee80211_tx_status_rtap_hdr {
42 struct ieee80211_radiotap_header hdr;
45 } __attribute__ ((packed));
47 /* common interface routines */
49 static int header_parse_80211(const struct sk_buff *skb, unsigned char *haddr)
51 memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
55 /* must be called under mdev tx lock */
56 static void ieee80211_configure_filter(struct ieee80211_local *local)
58 unsigned int changed_flags;
59 unsigned int new_flags = 0;
61 if (atomic_read(&local->iff_promiscs))
62 new_flags |= FIF_PROMISC_IN_BSS;
64 if (atomic_read(&local->iff_allmultis))
65 new_flags |= FIF_ALLMULTI;
68 new_flags |= FIF_CONTROL |
70 FIF_BCN_PRBRESP_PROMISC;
72 changed_flags = local->filter_flags ^ new_flags;
77 local->ops->configure_filter(local_to_hw(local),
78 changed_flags, &new_flags,
79 local->mdev->mc_count,
80 local->mdev->mc_list);
82 WARN_ON(new_flags & (1<<31));
84 local->filter_flags = new_flags & ~(1<<31);
87 /* master interface */
89 static int ieee80211_master_open(struct net_device *dev)
91 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
92 struct ieee80211_sub_if_data *sdata;
93 int res = -EOPNOTSUPP;
95 /* we hold the RTNL here so can safely walk the list */
96 list_for_each_entry(sdata, &local->interfaces, list) {
97 if (sdata->dev != dev && netif_running(sdata->dev)) {
105 static int ieee80211_master_stop(struct net_device *dev)
107 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
108 struct ieee80211_sub_if_data *sdata;
110 /* we hold the RTNL here so can safely walk the list */
111 list_for_each_entry(sdata, &local->interfaces, list)
112 if (sdata->dev != dev && netif_running(sdata->dev))
113 dev_close(sdata->dev);
118 static void ieee80211_master_set_multicast_list(struct net_device *dev)
120 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
122 ieee80211_configure_filter(local);
125 /* regular interfaces */
127 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
129 /* FIX: what would be proper limits for MTU?
130 * This interface uses 802.3 frames. */
131 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6) {
132 printk(KERN_WARNING "%s: invalid MTU %d\n",
137 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
138 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
139 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
144 static inline int identical_mac_addr_allowed(int type1, int type2)
146 return (type1 == IEEE80211_IF_TYPE_MNTR ||
147 type2 == IEEE80211_IF_TYPE_MNTR ||
148 (type1 == IEEE80211_IF_TYPE_AP &&
149 type2 == IEEE80211_IF_TYPE_WDS) ||
150 (type1 == IEEE80211_IF_TYPE_WDS &&
151 (type2 == IEEE80211_IF_TYPE_WDS ||
152 type2 == IEEE80211_IF_TYPE_AP)) ||
153 (type1 == IEEE80211_IF_TYPE_AP &&
154 type2 == IEEE80211_IF_TYPE_VLAN) ||
155 (type1 == IEEE80211_IF_TYPE_VLAN &&
156 (type2 == IEEE80211_IF_TYPE_AP ||
157 type2 == IEEE80211_IF_TYPE_VLAN)));
160 static int ieee80211_open(struct net_device *dev)
162 struct ieee80211_sub_if_data *sdata, *nsdata;
163 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
164 struct ieee80211_if_init_conf conf;
167 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
169 /* we hold the RTNL here so can safely walk the list */
170 list_for_each_entry(nsdata, &local->interfaces, list) {
171 struct net_device *ndev = nsdata->dev;
173 if (ndev != dev && ndev != local->mdev && netif_running(ndev) &&
174 compare_ether_addr(dev->dev_addr, ndev->dev_addr) == 0) {
176 * check whether it may have the same address
178 if (!identical_mac_addr_allowed(sdata->type,
183 * can only add VLANs to enabled APs
185 if (sdata->type == IEEE80211_IF_TYPE_VLAN &&
186 nsdata->type == IEEE80211_IF_TYPE_AP &&
187 netif_running(nsdata->dev))
188 sdata->u.vlan.ap = nsdata;
192 switch (sdata->type) {
193 case IEEE80211_IF_TYPE_WDS:
194 if (is_zero_ether_addr(sdata->u.wds.remote_addr))
197 case IEEE80211_IF_TYPE_VLAN:
198 if (!sdata->u.vlan.ap)
201 case IEEE80211_IF_TYPE_AP:
202 case IEEE80211_IF_TYPE_STA:
203 case IEEE80211_IF_TYPE_MNTR:
204 case IEEE80211_IF_TYPE_IBSS:
205 /* no special treatment */
207 case IEEE80211_IF_TYPE_INVALID:
213 if (local->open_count == 0) {
215 if (local->ops->start)
216 res = local->ops->start(local_to_hw(local));
221 switch (sdata->type) {
222 case IEEE80211_IF_TYPE_VLAN:
223 list_add(&sdata->u.vlan.list, &sdata->u.vlan.ap->u.ap.vlans);
224 /* no need to tell driver */
226 case IEEE80211_IF_TYPE_MNTR:
227 /* must be before the call to ieee80211_configure_filter */
229 if (local->monitors == 1) {
230 netif_tx_lock_bh(local->mdev);
231 ieee80211_configure_filter(local);
232 netif_tx_unlock_bh(local->mdev);
234 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
235 ieee80211_hw_config(local);
238 case IEEE80211_IF_TYPE_STA:
239 case IEEE80211_IF_TYPE_IBSS:
240 sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET;
243 conf.if_id = dev->ifindex;
244 conf.type = sdata->type;
245 conf.mac_addr = dev->dev_addr;
246 res = local->ops->add_interface(local_to_hw(local), &conf);
247 if (res && !local->open_count && local->ops->stop)
248 local->ops->stop(local_to_hw(local));
252 ieee80211_if_config(dev);
253 ieee80211_reset_erp_info(dev);
254 ieee80211_enable_keys(sdata);
256 if (sdata->type == IEEE80211_IF_TYPE_STA &&
257 !(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME))
258 netif_carrier_off(dev);
260 netif_carrier_on(dev);
263 if (local->open_count == 0) {
264 res = dev_open(local->mdev);
266 tasklet_enable(&local->tx_pending_tasklet);
267 tasklet_enable(&local->tasklet);
272 netif_start_queue(dev);
277 static int ieee80211_stop(struct net_device *dev)
279 struct ieee80211_sub_if_data *sdata;
280 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
281 struct ieee80211_if_init_conf conf;
283 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
285 netif_stop_queue(dev);
287 dev_mc_unsync(local->mdev, dev);
289 /* down all dependent devices, that is VLANs */
290 if (sdata->type == IEEE80211_IF_TYPE_AP) {
291 struct ieee80211_sub_if_data *vlan, *tmp;
293 list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans,
295 dev_close(vlan->dev);
296 WARN_ON(!list_empty(&sdata->u.ap.vlans));
301 switch (sdata->type) {
302 case IEEE80211_IF_TYPE_VLAN:
303 list_del(&sdata->u.vlan.list);
304 sdata->u.vlan.ap = NULL;
305 /* no need to tell driver */
307 case IEEE80211_IF_TYPE_MNTR:
309 if (local->monitors == 0) {
310 netif_tx_lock_bh(local->mdev);
311 ieee80211_configure_filter(local);
312 netif_tx_unlock_bh(local->mdev);
314 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
315 ieee80211_hw_config(local);
318 case IEEE80211_IF_TYPE_STA:
319 case IEEE80211_IF_TYPE_IBSS:
320 sdata->u.sta.state = IEEE80211_DISABLED;
321 del_timer_sync(&sdata->u.sta.timer);
323 * When we get here, the interface is marked down.
324 * Call synchronize_rcu() to wait for the RX path
325 * should it be using the interface and enqueuing
326 * frames at this very time on another CPU.
329 skb_queue_purge(&sdata->u.sta.skb_queue);
331 if (!local->ops->hw_scan &&
332 local->scan_dev == sdata->dev) {
333 local->sta_scanning = 0;
334 cancel_delayed_work(&local->scan_work);
336 flush_workqueue(local->hw.workqueue);
338 sdata->u.sta.flags &= ~IEEE80211_STA_PRIVACY_INVOKED;
339 kfree(sdata->u.sta.extra_ie);
340 sdata->u.sta.extra_ie = NULL;
341 sdata->u.sta.extra_ie_len = 0;
344 conf.if_id = dev->ifindex;
345 conf.type = sdata->type;
346 conf.mac_addr = dev->dev_addr;
347 /* disable all keys for as long as this netdev is down */
348 ieee80211_disable_keys(sdata);
349 local->ops->remove_interface(local_to_hw(local), &conf);
352 if (local->open_count == 0) {
353 if (netif_running(local->mdev))
354 dev_close(local->mdev);
356 if (local->ops->stop)
357 local->ops->stop(local_to_hw(local));
359 tasklet_disable(&local->tx_pending_tasklet);
360 tasklet_disable(&local->tasklet);
366 static void ieee80211_set_multicast_list(struct net_device *dev)
368 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
369 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
370 int allmulti, promisc, sdata_allmulti, sdata_promisc;
372 allmulti = !!(dev->flags & IFF_ALLMULTI);
373 promisc = !!(dev->flags & IFF_PROMISC);
374 sdata_allmulti = sdata->flags & IEEE80211_SDATA_ALLMULTI;
375 sdata_promisc = sdata->flags & IEEE80211_SDATA_PROMISC;
377 if (allmulti != sdata_allmulti) {
378 if (dev->flags & IFF_ALLMULTI)
379 atomic_inc(&local->iff_allmultis);
381 atomic_dec(&local->iff_allmultis);
382 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
385 if (promisc != sdata_promisc) {
386 if (dev->flags & IFF_PROMISC)
387 atomic_inc(&local->iff_promiscs);
389 atomic_dec(&local->iff_promiscs);
390 sdata->flags ^= IEEE80211_SDATA_PROMISC;
393 dev_mc_sync(local->mdev, dev);
396 static const struct header_ops ieee80211_header_ops = {
397 .create = eth_header,
398 .parse = header_parse_80211,
399 .rebuild = eth_rebuild_header,
400 .cache = eth_header_cache,
401 .cache_update = eth_header_cache_update,
404 /* Must not be called for mdev */
405 void ieee80211_if_setup(struct net_device *dev)
408 dev->header_ops = &ieee80211_header_ops;
409 dev->hard_start_xmit = ieee80211_subif_start_xmit;
410 dev->wireless_handlers = &ieee80211_iw_handler_def;
411 dev->set_multicast_list = ieee80211_set_multicast_list;
412 dev->change_mtu = ieee80211_change_mtu;
413 dev->open = ieee80211_open;
414 dev->stop = ieee80211_stop;
415 dev->destructor = ieee80211_if_free;
418 /* WDS specialties */
420 int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr)
422 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
423 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
424 struct sta_info *sta;
425 DECLARE_MAC_BUF(mac);
427 if (compare_ether_addr(remote_addr, sdata->u.wds.remote_addr) == 0)
430 /* Create STA entry for the new peer */
431 sta = sta_info_add(local, dev, remote_addr, GFP_KERNEL);
436 /* Remove STA entry for the old peer */
437 sta = sta_info_get(local, sdata->u.wds.remote_addr);
442 printk(KERN_DEBUG "%s: could not find STA entry for WDS link "
444 dev->name, print_mac(mac, sdata->u.wds.remote_addr));
447 /* Update WDS link data */
448 memcpy(&sdata->u.wds.remote_addr, remote_addr, ETH_ALEN);
453 /* everything else */
455 static int __ieee80211_if_config(struct net_device *dev,
456 struct sk_buff *beacon,
457 struct ieee80211_tx_control *control)
459 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
460 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
461 struct ieee80211_if_conf conf;
463 if (!local->ops->config_interface || !netif_running(dev))
466 memset(&conf, 0, sizeof(conf));
467 conf.type = sdata->type;
468 if (sdata->type == IEEE80211_IF_TYPE_STA ||
469 sdata->type == IEEE80211_IF_TYPE_IBSS) {
470 conf.bssid = sdata->u.sta.bssid;
471 conf.ssid = sdata->u.sta.ssid;
472 conf.ssid_len = sdata->u.sta.ssid_len;
473 } else if (sdata->type == IEEE80211_IF_TYPE_AP) {
474 conf.ssid = sdata->u.ap.ssid;
475 conf.ssid_len = sdata->u.ap.ssid_len;
476 conf.beacon = beacon;
477 conf.beacon_control = control;
479 return local->ops->config_interface(local_to_hw(local),
480 dev->ifindex, &conf);
483 int ieee80211_if_config(struct net_device *dev)
485 return __ieee80211_if_config(dev, NULL, NULL);
488 int ieee80211_if_config_beacon(struct net_device *dev)
490 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
491 struct ieee80211_tx_control control;
494 if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
496 skb = ieee80211_beacon_get(local_to_hw(local), dev->ifindex, &control);
499 return __ieee80211_if_config(dev, skb, &control);
502 int ieee80211_hw_config(struct ieee80211_local *local)
504 struct ieee80211_hw_mode *mode;
505 struct ieee80211_channel *chan;
508 if (local->sta_scanning) {
509 chan = local->scan_channel;
510 mode = local->scan_hw_mode;
512 chan = local->oper_channel;
513 mode = local->oper_hw_mode;
516 local->hw.conf.channel = chan->chan;
517 local->hw.conf.channel_val = chan->val;
518 if (!local->hw.conf.power_level) {
519 local->hw.conf.power_level = chan->power_level;
521 local->hw.conf.power_level = min(chan->power_level,
522 local->hw.conf.power_level);
524 local->hw.conf.freq = chan->freq;
525 local->hw.conf.phymode = mode->mode;
526 local->hw.conf.antenna_max = chan->antenna_max;
527 local->hw.conf.chan = chan;
528 local->hw.conf.mode = mode;
530 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
531 printk(KERN_DEBUG "HW CONFIG: channel=%d freq=%d "
532 "phymode=%d\n", local->hw.conf.channel, local->hw.conf.freq,
533 local->hw.conf.phymode);
534 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
536 if (local->open_count)
537 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
542 void ieee80211_erp_info_change_notify(struct net_device *dev, u8 changes)
544 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
545 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
546 if (local->ops->erp_ie_changed)
547 local->ops->erp_ie_changed(local_to_hw(local), changes,
548 !!(sdata->flags & IEEE80211_SDATA_USE_PROTECTION),
549 !(sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE));
552 void ieee80211_reset_erp_info(struct net_device *dev)
554 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
556 sdata->flags &= ~(IEEE80211_SDATA_USE_PROTECTION |
557 IEEE80211_SDATA_SHORT_PREAMBLE);
558 ieee80211_erp_info_change_notify(dev,
559 IEEE80211_ERP_CHANGE_PROTECTION |
560 IEEE80211_ERP_CHANGE_PREAMBLE);
563 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
565 struct ieee80211_tx_status *status)
567 struct ieee80211_local *local = hw_to_local(hw);
568 struct ieee80211_tx_status *saved;
571 skb->dev = local->mdev;
572 saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC);
573 if (unlikely(!saved)) {
575 printk(KERN_WARNING "%s: Not enough memory, "
576 "dropping tx status", skb->dev->name);
577 /* should be dev_kfree_skb_irq, but due to this function being
578 * named _irqsafe instead of just _irq we can't be sure that
579 * people won't call it from non-irq contexts */
580 dev_kfree_skb_any(skb);
583 memcpy(saved, status, sizeof(struct ieee80211_tx_status));
584 /* copy pointer to saved status into skb->cb for use by tasklet */
585 memcpy(skb->cb, &saved, sizeof(saved));
587 skb->pkt_type = IEEE80211_TX_STATUS_MSG;
588 skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ?
589 &local->skb_queue : &local->skb_queue_unreliable, skb);
590 tmp = skb_queue_len(&local->skb_queue) +
591 skb_queue_len(&local->skb_queue_unreliable);
592 while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
593 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
594 memcpy(&saved, skb->cb, sizeof(saved));
596 dev_kfree_skb_irq(skb);
598 I802_DEBUG_INC(local->tx_status_drop);
600 tasklet_schedule(&local->tasklet);
602 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
604 static void ieee80211_tasklet_handler(unsigned long data)
606 struct ieee80211_local *local = (struct ieee80211_local *) data;
608 struct ieee80211_rx_status rx_status;
609 struct ieee80211_tx_status *tx_status;
611 while ((skb = skb_dequeue(&local->skb_queue)) ||
612 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
613 switch (skb->pkt_type) {
614 case IEEE80211_RX_MSG:
615 /* status is in skb->cb */
616 memcpy(&rx_status, skb->cb, sizeof(rx_status));
617 /* Clear skb->type in order to not confuse kernel
620 __ieee80211_rx(local_to_hw(local), skb, &rx_status);
622 case IEEE80211_TX_STATUS_MSG:
623 /* get pointer to saved status out of skb->cb */
624 memcpy(&tx_status, skb->cb, sizeof(tx_status));
626 ieee80211_tx_status(local_to_hw(local),
630 default: /* should never get here! */
631 printk(KERN_ERR "%s: Unknown message type (%d)\n",
632 wiphy_name(local->hw.wiphy), skb->pkt_type);
639 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
640 * make a prepared TX frame (one that has been given to hw) to look like brand
641 * new IEEE 802.11 frame that is ready to go through TX processing again.
642 * Also, tx_packet_data in cb is restored from tx_control. */
643 static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
644 struct ieee80211_key *key,
646 struct ieee80211_tx_control *control)
648 int hdrlen, iv_len, mic_len;
649 struct ieee80211_tx_packet_data *pkt_data;
651 pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
652 pkt_data->ifindex = control->ifindex;
654 if (control->flags & IEEE80211_TXCTL_REQ_TX_STATUS)
655 pkt_data->flags |= IEEE80211_TXPD_REQ_TX_STATUS;
656 if (control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT)
657 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
658 if (control->flags & IEEE80211_TXCTL_REQUEUE)
659 pkt_data->flags |= IEEE80211_TXPD_REQUEUE;
660 pkt_data->queue = control->queue;
662 hdrlen = ieee80211_get_hdrlen_from_skb(skb);
667 switch (key->conf.alg) {
670 mic_len = WEP_ICV_LEN;
673 iv_len = TKIP_IV_LEN;
674 mic_len = TKIP_ICV_LEN;
677 iv_len = CCMP_HDR_LEN;
678 mic_len = CCMP_MIC_LEN;
684 if (skb->len >= mic_len &&
685 !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
686 skb_trim(skb, skb->len - mic_len);
687 if (skb->len >= iv_len && skb->len > hdrlen) {
688 memmove(skb->data + iv_len, skb->data, hdrlen);
689 skb_pull(skb, iv_len);
694 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
695 u16 fc = le16_to_cpu(hdr->frame_control);
696 if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
697 fc &= ~IEEE80211_STYPE_QOS_DATA;
698 hdr->frame_control = cpu_to_le16(fc);
699 memmove(skb->data + 2, skb->data, hdrlen - 2);
705 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
706 struct ieee80211_tx_status *status)
708 struct sk_buff *skb2;
709 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
710 struct ieee80211_local *local = hw_to_local(hw);
712 struct ieee80211_tx_status_rtap_hdr *rthdr;
713 struct ieee80211_sub_if_data *sdata;
718 "%s: ieee80211_tx_status called with NULL status\n",
719 wiphy_name(local->hw.wiphy));
724 if (status->excessive_retries) {
725 struct sta_info *sta;
726 sta = sta_info_get(local, hdr->addr1);
728 if (sta->flags & WLAN_STA_PS) {
729 /* The STA is in power save mode, so assume
730 * that this TX packet failed because of that.
732 status->excessive_retries = 0;
733 status->flags |= IEEE80211_TX_STATUS_TX_FILTERED;
739 if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) {
740 struct sta_info *sta;
741 sta = sta_info_get(local, hdr->addr1);
743 sta->tx_filtered_count++;
745 /* Clear the TX filter mask for this STA when sending
746 * the next packet. If the STA went to power save mode,
747 * this will happen when it is waking up for the next
749 sta->clear_dst_mask = 1;
751 /* TODO: Is the WLAN_STA_PS flag always set here or is
752 * the race between RX and TX status causing some
753 * packets to be filtered out before 80211.o gets an
754 * update for PS status? This seems to be the case, so
755 * no changes are likely to be needed. */
756 if (sta->flags & WLAN_STA_PS &&
757 skb_queue_len(&sta->tx_filtered) <
759 ieee80211_remove_tx_extra(local, sta->key,
762 skb_queue_tail(&sta->tx_filtered, skb);
763 } else if (!(sta->flags & WLAN_STA_PS) &&
764 !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) {
765 /* Software retry the packet once */
766 status->control.flags |= IEEE80211_TXCTL_REQUEUE;
767 ieee80211_remove_tx_extra(local, sta->key,
772 if (net_ratelimit()) {
773 printk(KERN_DEBUG "%s: dropped TX "
774 "filtered frame queue_len=%d "
776 wiphy_name(local->hw.wiphy),
779 !!(sta->flags & WLAN_STA_PS),
788 /* FIXME: STUPID to call this with both local and local->mdev */
789 rate_control_tx_status(local, local->mdev, skb, status);
792 ieee80211_led_tx(local, 0);
795 * Fragments are passed to low-level drivers as separate skbs, so these
796 * are actually fragments, not frames. Update frame counters only for
797 * the first fragment of the frame. */
799 frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
800 type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
802 if (status->flags & IEEE80211_TX_STATUS_ACK) {
804 local->dot11TransmittedFrameCount++;
805 if (is_multicast_ether_addr(hdr->addr1))
806 local->dot11MulticastTransmittedFrameCount++;
807 if (status->retry_count > 0)
808 local->dot11RetryCount++;
809 if (status->retry_count > 1)
810 local->dot11MultipleRetryCount++;
813 /* This counter shall be incremented for an acknowledged MPDU
814 * with an individual address in the address 1 field or an MPDU
815 * with a multicast address in the address 1 field of type Data
817 if (!is_multicast_ether_addr(hdr->addr1) ||
818 type == IEEE80211_FTYPE_DATA ||
819 type == IEEE80211_FTYPE_MGMT)
820 local->dot11TransmittedFragmentCount++;
823 local->dot11FailedCount++;
826 /* this was a transmitted frame, but now we want to reuse it */
829 if (!local->monitors) {
834 /* send frame to monitor interfaces now */
836 if (skb_headroom(skb) < sizeof(*rthdr)) {
837 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
842 rthdr = (struct ieee80211_tx_status_rtap_hdr*)
843 skb_push(skb, sizeof(*rthdr));
845 memset(rthdr, 0, sizeof(*rthdr));
846 rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
847 rthdr->hdr.it_present =
848 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
849 (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
851 if (!(status->flags & IEEE80211_TX_STATUS_ACK) &&
852 !is_multicast_ether_addr(hdr->addr1))
853 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
855 if ((status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) &&
856 (status->control.flags & IEEE80211_TXCTL_USE_CTS_PROTECT))
857 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
858 else if (status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS)
859 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
861 rthdr->data_retries = status->retry_count;
864 monitors = local->monitors;
865 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
867 * Using the monitors counter is possibly racy, but
868 * if the value is wrong we simply either clone the skb
869 * once too much or forget sending it to one monitor iface
870 * The latter case isn't nice but fixing the race is much
873 if (!monitors || !skb)
876 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
877 if (!netif_running(sdata->dev))
881 skb2 = skb_clone(skb, GFP_ATOMIC);
884 skb->dev = sdata->dev;
885 /* XXX: is this sufficient for BPF? */
886 skb_set_mac_header(skb, 0);
887 skb->ip_summed = CHECKSUM_UNNECESSARY;
888 skb->pkt_type = PACKET_OTHERHOST;
889 skb->protocol = htons(ETH_P_802_2);
890 memset(skb->cb, 0, sizeof(skb->cb));
900 EXPORT_SYMBOL(ieee80211_tx_status);
902 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
903 const struct ieee80211_ops *ops)
905 struct net_device *mdev;
906 struct ieee80211_local *local;
907 struct ieee80211_sub_if_data *sdata;
911 /* Ensure 32-byte alignment of our private data and hw private data.
912 * We use the wiphy priv data for both our ieee80211_local and for
913 * the driver's private data
915 * In memory it'll be like this:
917 * +-------------------------+
919 * +-------------------------+
920 * | struct ieee80211_local |
921 * +-------------------------+
922 * | driver's private data |
923 * +-------------------------+
926 priv_size = ((sizeof(struct ieee80211_local) +
927 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
930 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
935 wiphy->privid = mac80211_wiphy_privid;
937 local = wiphy_priv(wiphy);
938 local->hw.wiphy = wiphy;
940 local->hw.priv = (char *)local +
941 ((sizeof(struct ieee80211_local) +
942 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
947 BUG_ON(!ops->config);
948 BUG_ON(!ops->add_interface);
949 BUG_ON(!ops->remove_interface);
950 BUG_ON(!ops->configure_filter);
953 /* for now, mdev needs sub_if_data :/ */
954 mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
955 "wmaster%d", ether_setup);
961 sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
962 mdev->ieee80211_ptr = &sdata->wdev;
963 sdata->wdev.wiphy = wiphy;
965 local->hw.queues = 1; /* default */
968 local->rx_pre_handlers = ieee80211_rx_pre_handlers;
969 local->rx_handlers = ieee80211_rx_handlers;
970 local->tx_handlers = ieee80211_tx_handlers;
972 local->bridge_packets = 1;
974 local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
975 local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
976 local->short_retry_limit = 7;
977 local->long_retry_limit = 4;
978 local->hw.conf.radio_enabled = 1;
980 local->enabled_modes = ~0;
982 INIT_LIST_HEAD(&local->modes_list);
984 INIT_LIST_HEAD(&local->interfaces);
986 INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
987 ieee80211_rx_bss_list_init(mdev);
989 sta_info_init(local);
991 mdev->hard_start_xmit = ieee80211_master_start_xmit;
992 mdev->open = ieee80211_master_open;
993 mdev->stop = ieee80211_master_stop;
994 mdev->type = ARPHRD_IEEE80211;
995 mdev->header_ops = &ieee80211_header_ops;
996 mdev->set_multicast_list = ieee80211_master_set_multicast_list;
998 sdata->type = IEEE80211_IF_TYPE_AP;
1000 sdata->local = local;
1001 sdata->u.ap.force_unicast_rateidx = -1;
1002 sdata->u.ap.max_ratectrl_rateidx = -1;
1003 ieee80211_if_sdata_init(sdata);
1004 /* no RCU needed since we're still during init phase */
1005 list_add_tail(&sdata->list, &local->interfaces);
1007 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1008 (unsigned long)local);
1009 tasklet_disable(&local->tx_pending_tasklet);
1011 tasklet_init(&local->tasklet,
1012 ieee80211_tasklet_handler,
1013 (unsigned long) local);
1014 tasklet_disable(&local->tasklet);
1016 skb_queue_head_init(&local->skb_queue);
1017 skb_queue_head_init(&local->skb_queue_unreliable);
1019 return local_to_hw(local);
1021 EXPORT_SYMBOL(ieee80211_alloc_hw);
1023 int ieee80211_register_hw(struct ieee80211_hw *hw)
1025 struct ieee80211_local *local = hw_to_local(hw);
1029 result = wiphy_register(local->hw.wiphy);
1033 name = wiphy_dev(local->hw.wiphy)->driver->name;
1034 local->hw.workqueue = create_singlethread_workqueue(name);
1035 if (!local->hw.workqueue) {
1037 goto fail_workqueue;
1041 * The hardware needs headroom for sending the frame,
1042 * and we need some headroom for passing the frame to monitor
1043 * interfaces, but never both at the same time.
1045 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1046 sizeof(struct ieee80211_tx_status_rtap_hdr));
1048 debugfs_hw_add(local);
1050 local->hw.conf.beacon_int = 1000;
1052 local->wstats_flags |= local->hw.max_rssi ?
1053 IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID;
1054 local->wstats_flags |= local->hw.max_signal ?
1055 IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1056 local->wstats_flags |= local->hw.max_noise ?
1057 IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1058 if (local->hw.max_rssi < 0 || local->hw.max_noise < 0)
1059 local->wstats_flags |= IW_QUAL_DBM;
1061 result = sta_info_start(local);
1066 result = dev_alloc_name(local->mdev, local->mdev->name);
1070 memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1071 SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1073 result = register_netdevice(local->mdev);
1077 ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1078 ieee80211_if_set_type(local->mdev, IEEE80211_IF_TYPE_AP);
1080 result = ieee80211_init_rate_ctrl_alg(local,
1081 hw->rate_control_algorithm);
1083 printk(KERN_DEBUG "%s: Failed to initialize rate control "
1084 "algorithm\n", wiphy_name(local->hw.wiphy));
1088 result = ieee80211_wep_init(local);
1091 printk(KERN_DEBUG "%s: Failed to initialize wep\n",
1092 wiphy_name(local->hw.wiphy));
1096 ieee80211_install_qdisc(local->mdev);
1098 /* add one default STA interface */
1099 result = ieee80211_if_add(local->mdev, "wlan%d", NULL,
1100 IEEE80211_IF_TYPE_STA);
1102 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
1103 wiphy_name(local->hw.wiphy));
1105 local->reg_state = IEEE80211_DEV_REGISTERED;
1108 ieee80211_led_init(local);
1113 rate_control_deinitialize(local);
1115 ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1116 unregister_netdevice(local->mdev);
1119 sta_info_stop(local);
1121 debugfs_hw_del(local);
1122 destroy_workqueue(local->hw.workqueue);
1124 wiphy_unregister(local->hw.wiphy);
1127 EXPORT_SYMBOL(ieee80211_register_hw);
1129 int ieee80211_register_hwmode(struct ieee80211_hw *hw,
1130 struct ieee80211_hw_mode *mode)
1132 struct ieee80211_local *local = hw_to_local(hw);
1133 struct ieee80211_rate *rate;
1136 INIT_LIST_HEAD(&mode->list);
1137 list_add_tail(&mode->list, &local->modes_list);
1139 local->hw_modes |= (1 << mode->mode);
1140 for (i = 0; i < mode->num_rates; i++) {
1141 rate = &(mode->rates[i]);
1142 rate->rate_inv = CHAN_UTIL_RATE_LCM / rate->rate;
1144 ieee80211_prepare_rates(local, mode);
1146 if (!local->oper_hw_mode) {
1147 /* Default to this mode */
1148 local->hw.conf.phymode = mode->mode;
1149 local->oper_hw_mode = local->scan_hw_mode = mode;
1150 local->oper_channel = local->scan_channel = &mode->channels[0];
1151 local->hw.conf.mode = local->oper_hw_mode;
1152 local->hw.conf.chan = local->oper_channel;
1155 if (!(hw->flags & IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED))
1156 ieee80211_set_default_regdomain(mode);
1160 EXPORT_SYMBOL(ieee80211_register_hwmode);
1162 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1164 struct ieee80211_local *local = hw_to_local(hw);
1165 struct ieee80211_sub_if_data *sdata, *tmp;
1168 tasklet_kill(&local->tx_pending_tasklet);
1169 tasklet_kill(&local->tasklet);
1173 BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED);
1175 local->reg_state = IEEE80211_DEV_UNREGISTERED;
1178 * At this point, interface list manipulations are fine
1179 * because the driver cannot be handing us frames any
1180 * more and the tasklet is killed.
1184 * First, we remove all non-master interfaces. Do this because they
1185 * may have bss pointer dependency on the master, and when we free
1186 * the master these would be freed as well, breaking our list
1187 * iteration completely.
1189 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1190 if (sdata->dev == local->mdev)
1192 list_del(&sdata->list);
1193 __ieee80211_if_del(local, sdata);
1196 /* then, finally, remove the master interface */
1197 __ieee80211_if_del(local, IEEE80211_DEV_TO_SUB_IF(local->mdev));
1201 ieee80211_rx_bss_list_deinit(local->mdev);
1202 ieee80211_clear_tx_pending(local);
1203 sta_info_stop(local);
1204 rate_control_deinitialize(local);
1205 debugfs_hw_del(local);
1207 for (i = 0; i < NUM_IEEE80211_MODES; i++) {
1208 kfree(local->supp_rates[i]);
1209 kfree(local->basic_rates[i]);
1212 if (skb_queue_len(&local->skb_queue)
1213 || skb_queue_len(&local->skb_queue_unreliable))
1214 printk(KERN_WARNING "%s: skb_queue not empty\n",
1215 wiphy_name(local->hw.wiphy));
1216 skb_queue_purge(&local->skb_queue);
1217 skb_queue_purge(&local->skb_queue_unreliable);
1219 destroy_workqueue(local->hw.workqueue);
1220 wiphy_unregister(local->hw.wiphy);
1221 ieee80211_wep_free(local);
1222 ieee80211_led_exit(local);
1224 EXPORT_SYMBOL(ieee80211_unregister_hw);
1226 void ieee80211_free_hw(struct ieee80211_hw *hw)
1228 struct ieee80211_local *local = hw_to_local(hw);
1230 ieee80211_if_free(local->mdev);
1231 wiphy_free(local->hw.wiphy);
1233 EXPORT_SYMBOL(ieee80211_free_hw);
1235 static int __init ieee80211_init(void)
1237 struct sk_buff *skb;
1240 BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb));
1242 #ifdef CONFIG_MAC80211_RCSIMPLE
1243 ret = ieee80211_rate_control_register(&mac80211_rcsimple);
1248 ret = ieee80211_wme_register();
1250 #ifdef CONFIG_MAC80211_RCSIMPLE
1251 ieee80211_rate_control_unregister(&mac80211_rcsimple);
1253 printk(KERN_DEBUG "ieee80211_init: failed to "
1254 "initialize WME (err=%d)\n", ret);
1258 ieee80211_debugfs_netdev_init();
1259 ieee80211_regdomain_init();
1264 static void __exit ieee80211_exit(void)
1266 #ifdef CONFIG_MAC80211_RCSIMPLE
1267 ieee80211_rate_control_unregister(&mac80211_rcsimple);
1270 ieee80211_wme_unregister();
1271 ieee80211_debugfs_netdev_exit();
1275 subsys_initcall(ieee80211_init);
1276 module_exit(ieee80211_exit);
1278 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1279 MODULE_LICENSE("GPL");