2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2007-2010 Johannes Berg <johannes@sipsolutions.net>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
15 #include <linux/kernel.h>
16 #include <linux/device.h>
17 #include <linux/if_ether.h>
18 #include <linux/interrupt.h>
19 #include <linux/list.h>
20 #include <linux/netdevice.h>
21 #include <linux/skbuff.h>
22 #include <linux/workqueue.h>
23 #include <linux/types.h>
24 #include <linux/spinlock.h>
25 #include <linux/etherdevice.h>
26 #include <linux/leds.h>
27 #include <net/ieee80211_radiotap.h>
28 #include <net/cfg80211.h>
29 #include <net/mac80211.h>
33 struct ieee80211_local;
35 /* Maximum number of broadcast/multicast frames to buffer when some of the
36 * associated stations are using power saving. */
37 #define AP_MAX_BC_BUFFER 128
39 /* Maximum number of frames buffered to all STAs, including multicast frames.
40 * Note: increasing this limit increases the potential memory requirement. Each
41 * frame can be up to about 2 kB long. */
42 #define TOTAL_MAX_TX_BUFFER 512
44 /* Required encryption head and tailroom */
45 #define IEEE80211_ENCRYPT_HEADROOM 8
46 #define IEEE80211_ENCRYPT_TAILROOM 18
48 /* IEEE 802.11 (Ch. 9.5 Defragmentation) requires support for concurrent
49 * reception of at least three fragmented frames. This limit can be increased
50 * by changing this define, at the cost of slower frame reassembly and
51 * increased memory use (about 2 kB of RAM per entry). */
52 #define IEEE80211_FRAGMENT_MAX 4
54 #define TU_TO_EXP_TIME(x) (jiffies + usecs_to_jiffies((x) * 1024))
56 #define IEEE80211_DEFAULT_UAPSD_QUEUES \
57 (IEEE80211_WMM_IE_STA_QOSINFO_AC_BK | \
58 IEEE80211_WMM_IE_STA_QOSINFO_AC_BE | \
59 IEEE80211_WMM_IE_STA_QOSINFO_AC_VI | \
60 IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
62 #define IEEE80211_DEFAULT_MAX_SP_LEN \
63 IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL
65 struct ieee80211_fragment_entry {
66 unsigned long first_frag_time;
68 unsigned int rx_queue;
69 unsigned int last_frag;
70 unsigned int extra_len;
71 struct sk_buff_head skb_list;
72 int ccmp; /* Whether fragments were encrypted with CCMP */
73 u8 last_pn[6]; /* PN of the last fragment if CCMP was used */
77 struct ieee80211_bss {
78 /* don't want to look up all the time */
80 u8 ssid[IEEE80211_MAX_SSID_LEN];
87 unsigned long last_probe_resp;
89 #ifdef CONFIG_MAC80211_MESH
95 #define IEEE80211_MAX_SUPP_RATES 32
96 u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
97 size_t supp_rates_len;
100 * During association, we save an ERP value from a probe response so
101 * that we can feed ERP info to the driver when handling the
102 * association completes. these fields probably won't be up-to-date
103 * otherwise, you probably don't want to use them.
109 static inline u8 *bss_mesh_cfg(struct ieee80211_bss *bss)
111 #ifdef CONFIG_MAC80211_MESH
112 return bss->mesh_cfg;
117 static inline u8 *bss_mesh_id(struct ieee80211_bss *bss)
119 #ifdef CONFIG_MAC80211_MESH
125 static inline u8 bss_mesh_id_len(struct ieee80211_bss *bss)
127 #ifdef CONFIG_MAC80211_MESH
128 return bss->mesh_id_len;
134 typedef unsigned __bitwise__ ieee80211_tx_result;
135 #define TX_CONTINUE ((__force ieee80211_tx_result) 0u)
136 #define TX_DROP ((__force ieee80211_tx_result) 1u)
137 #define TX_QUEUED ((__force ieee80211_tx_result) 2u)
139 #define IEEE80211_TX_FRAGMENTED BIT(0)
140 #define IEEE80211_TX_UNICAST BIT(1)
141 #define IEEE80211_TX_PS_BUFFERED BIT(2)
143 struct ieee80211_tx_data {
145 struct ieee80211_local *local;
146 struct ieee80211_sub_if_data *sdata;
147 struct sta_info *sta;
148 struct ieee80211_key *key;
150 struct ieee80211_channel *channel;
157 typedef unsigned __bitwise__ ieee80211_rx_result;
158 #define RX_CONTINUE ((__force ieee80211_rx_result) 0u)
159 #define RX_DROP_UNUSABLE ((__force ieee80211_rx_result) 1u)
160 #define RX_DROP_MONITOR ((__force ieee80211_rx_result) 2u)
161 #define RX_QUEUED ((__force ieee80211_rx_result) 3u)
164 * enum ieee80211_packet_rx_flags - packet RX flags
165 * @IEEE80211_RX_RA_MATCH: frame is destined to interface currently processed
166 * (incl. multicast frames)
167 * @IEEE80211_RX_IN_SCAN: received while scanning
168 * @IEEE80211_RX_FRAGMENTED: fragmented frame
169 * @IEEE80211_RX_AMSDU: a-MSDU packet
170 * @IEEE80211_RX_MALFORMED_ACTION_FRM: action frame is malformed
171 * @IEEE80211_RX_DEFERRED_RELEASE: frame was subjected to receive reordering
173 * These are per-frame flags that are attached to a frame in the
174 * @rx_flags field of &struct ieee80211_rx_status.
176 enum ieee80211_packet_rx_flags {
177 IEEE80211_RX_IN_SCAN = BIT(0),
178 IEEE80211_RX_RA_MATCH = BIT(1),
179 IEEE80211_RX_FRAGMENTED = BIT(2),
180 IEEE80211_RX_AMSDU = BIT(3),
181 IEEE80211_RX_MALFORMED_ACTION_FRM = BIT(4),
182 IEEE80211_RX_DEFERRED_RELEASE = BIT(5),
186 * enum ieee80211_rx_flags - RX data flags
188 * @IEEE80211_RX_CMNTR: received on cooked monitor already
190 * These flags are used across handling multiple interfaces
191 * for a single frame.
193 enum ieee80211_rx_flags {
194 IEEE80211_RX_CMNTR = BIT(0),
197 struct ieee80211_rx_data {
199 struct ieee80211_local *local;
200 struct ieee80211_sub_if_data *sdata;
201 struct sta_info *sta;
202 struct ieee80211_key *key;
207 * Index into sequence numbers array, 0..16
208 * since the last (16) is used for non-QoS,
209 * will be 16 on non-QoS frames.
214 * Index into the security IV/PN arrays, 0..16
215 * since the last (16) is used for CCMP-encrypted
216 * management frames, will be set to 16 on mgmt
217 * frames and 0 on non-QoS frames.
227 int head_len, tail_len;
231 struct ieee80211_if_ap {
232 struct beacon_data __rcu *beacon;
234 struct list_head vlans;
236 /* yes, this looks ugly, but guarantees that we can later use
238 * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
239 u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
240 struct sk_buff_head ps_bc_buf;
241 atomic_t num_sta_ps; /* number of stations in PS mode */
246 struct ieee80211_if_wds {
247 struct sta_info *sta;
248 u8 remote_addr[ETH_ALEN];
251 struct ieee80211_if_vlan {
252 struct list_head list;
254 /* used for all tx if the VLAN is configured to 4-addr mode */
255 struct sta_info __rcu *sta;
259 __u32 fwded_mcast; /* Mesh forwarded multicast frames */
260 __u32 fwded_unicast; /* Mesh forwarded unicast frames */
261 __u32 fwded_frames; /* Mesh total forwarded frames */
262 __u32 dropped_frames_ttl; /* Not transmitted since mesh_ttl == 0*/
263 __u32 dropped_frames_no_route; /* Not transmitted, no route found */
264 atomic_t estab_plinks;
267 #define PREQ_Q_F_START 0x1
268 #define PREQ_Q_F_REFRESH 0x2
269 struct mesh_preq_queue {
270 struct list_head list;
275 enum ieee80211_work_type {
276 IEEE80211_WORK_ABORT,
277 IEEE80211_WORK_DIRECT_PROBE,
279 IEEE80211_WORK_ASSOC_BEACON_WAIT,
280 IEEE80211_WORK_ASSOC,
281 IEEE80211_WORK_REMAIN_ON_CHANNEL,
282 IEEE80211_WORK_OFFCHANNEL_TX,
286 * enum work_done_result - indicates what to do after work was done
288 * @WORK_DONE_DESTROY: This work item is no longer needed, destroy.
289 * @WORK_DONE_REQUEUE: This work item was reset to be reused, and
290 * should be requeued.
292 enum work_done_result {
297 struct ieee80211_work {
298 struct list_head list;
300 struct rcu_head rcu_head;
302 struct ieee80211_sub_if_data *sdata;
304 enum work_done_result (*done)(struct ieee80211_work *wk,
305 struct sk_buff *skb);
307 struct ieee80211_channel *chan;
308 enum nl80211_channel_type chan_type;
310 unsigned long timeout;
311 enum ieee80211_work_type type;
313 u8 filter_ta[ETH_ALEN];
320 u16 algorithm, transaction;
321 u8 ssid[IEEE80211_MAX_SSID_LEN];
323 u8 key[WLAN_KEY_LEN_WEP104];
328 struct cfg80211_bss *bss;
329 const u8 *supp_rates;
330 const u8 *ht_information_ie;
331 enum ieee80211_smps_mode smps;
334 u8 prev_bssid[ETH_ALEN];
335 u8 ssid[IEEE80211_MAX_SSID_LEN];
338 bool wmm_used, use_11n, uapsd_used;
344 struct sk_buff *frame;
354 /* flags used in struct ieee80211_if_managed.flags */
355 enum ieee80211_sta_flags {
356 IEEE80211_STA_BEACON_POLL = BIT(0),
357 IEEE80211_STA_CONNECTION_POLL = BIT(1),
358 IEEE80211_STA_CONTROL_PORT = BIT(2),
359 IEEE80211_STA_DISABLE_11N = BIT(4),
360 IEEE80211_STA_CSA_RECEIVED = BIT(5),
361 IEEE80211_STA_MFP_ENABLED = BIT(6),
362 IEEE80211_STA_UAPSD_ENABLED = BIT(7),
363 IEEE80211_STA_NULLFUNC_ACKED = BIT(8),
364 IEEE80211_STA_RESET_SIGNAL_AVE = BIT(9),
367 struct ieee80211_if_managed {
368 struct timer_list timer;
369 struct timer_list conn_mon_timer;
370 struct timer_list bcn_mon_timer;
371 struct timer_list chswitch_timer;
372 struct work_struct monitor_work;
373 struct work_struct chswitch_work;
374 struct work_struct beacon_connection_loss_work;
376 unsigned long beacon_timeout;
377 unsigned long probe_timeout;
378 int probe_send_count;
379 bool nullfunc_failed;
382 struct cfg80211_bss *associated;
388 unsigned long timers_running; /* used for quiesce/restart */
389 bool powersave; /* powersave requested for this iface */
390 enum ieee80211_smps_mode req_smps, /* requested smps mode */
391 ap_smps, /* smps mode AP thinks we're in */
392 driver_smps_mode; /* smps mode request */
394 struct work_struct request_smps_work;
398 bool beacon_crc_valid;
402 IEEE80211_MFP_DISABLED,
403 IEEE80211_MFP_OPTIONAL,
404 IEEE80211_MFP_REQUIRED
405 } mfp; /* management frame protection */
407 int wmm_last_param_set;
411 /* Signal strength from the last Beacon frame in the current BSS. */
412 int last_beacon_signal;
415 * Weighted average of the signal strength from Beacon frames in the
416 * current BSS. This is in units of 1/16 of the signal unit to maintain
417 * accuracy and to speed up calculations, i.e., the value need to be
418 * divided by 16 to get the actual value.
420 int ave_beacon_signal;
423 * Number of Beacon frames used in ave_beacon_signal. This can be used
424 * to avoid generating less reliable cqm events that would be based
425 * only on couple of received frames.
427 unsigned int count_beacon_signal;
430 * Last Beacon frame signal strength average (ave_beacon_signal / 16)
431 * that triggered a cqm event. 0 indicates that no event has been
432 * generated for the current association.
434 int last_cqm_event_signal;
437 * State variables for keeping track of RSSI of the AP currently
438 * connected to and informing driver when RSSI has gone
439 * below/above a certain threshold.
441 int rssi_min_thold, rssi_max_thold;
442 int last_ave_beacon_signal;
445 struct ieee80211_if_ibss {
446 struct timer_list timer;
450 unsigned long last_scan_completed;
461 u8 ssid[IEEE80211_MAX_SSID_LEN];
464 struct ieee80211_channel *channel;
466 unsigned long ibss_join_req;
467 /* probe response/beacon for IBSS */
468 struct sk_buff __rcu *presp;
472 IEEE80211_IBSS_MLME_SEARCH,
473 IEEE80211_IBSS_MLME_JOINED,
477 struct ieee80211_if_mesh {
478 struct timer_list housekeeping_timer;
479 struct timer_list mesh_path_timer;
480 struct timer_list mesh_path_root_timer;
482 unsigned long timers_running;
484 unsigned long wrkq_flags;
486 u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
488 /* Active Path Selection Protocol Identifier */
490 /* Active Path Selection Metric Identifier */
492 /* Congestion Control Mode Identifier */
494 /* Synchronization Protocol Identifier */
496 /* Authentication Protocol Identifier */
498 /* Local mesh Sequence Number */
500 /* Last used PREQ ID */
503 /* Timestamp of last SN update */
504 unsigned long last_sn_update;
505 /* Timestamp of last SN sent */
506 unsigned long last_preq;
507 struct mesh_rmc *rmc;
508 spinlock_t mesh_preq_queue_lock;
509 struct mesh_preq_queue preq_queue;
511 struct mesh_stats mshstats;
512 struct mesh_config mshcfg;
514 bool accepting_plinks;
518 IEEE80211_MESH_SEC_NONE = 0x0,
519 IEEE80211_MESH_SEC_AUTHED = 0x1,
520 IEEE80211_MESH_SEC_SECURED = 0x2,
524 #ifdef CONFIG_MAC80211_MESH
525 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
526 do { (msh)->mshstats.name++; } while (0)
528 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
533 * enum ieee80211_sub_if_data_flags - virtual interface flags
535 * @IEEE80211_SDATA_ALLMULTI: interface wants all multicast packets
536 * @IEEE80211_SDATA_PROMISC: interface is promisc
537 * @IEEE80211_SDATA_OPERATING_GMODE: operating in G-only mode
538 * @IEEE80211_SDATA_DONT_BRIDGE_PACKETS: bridge packets between
539 * associated stations and deliver multicast frames both
540 * back to wireless media and to the local net stack.
541 * @IEEE80211_SDATA_DISCONNECT_RESUME: Disconnect after resume.
543 enum ieee80211_sub_if_data_flags {
544 IEEE80211_SDATA_ALLMULTI = BIT(0),
545 IEEE80211_SDATA_PROMISC = BIT(1),
546 IEEE80211_SDATA_OPERATING_GMODE = BIT(2),
547 IEEE80211_SDATA_DONT_BRIDGE_PACKETS = BIT(3),
548 IEEE80211_SDATA_DISCONNECT_RESUME = BIT(4),
552 * enum ieee80211_sdata_state_bits - virtual interface state bits
553 * @SDATA_STATE_RUNNING: virtual interface is up & running; this
554 * mirrors netif_running() but is separate for interface type
555 * change handling while the interface is up
556 * @SDATA_STATE_OFFCHANNEL: This interface is currently in offchannel
557 * mode, so queues are stopped
559 enum ieee80211_sdata_state_bits {
561 SDATA_STATE_OFFCHANNEL,
564 struct ieee80211_sub_if_data {
565 struct list_head list;
567 struct wireless_dev wdev;
570 struct list_head key_list;
572 /* count for keys needing tailroom space allocation */
573 int crypto_tx_tailroom_needed_cnt;
575 struct net_device *dev;
576 struct ieee80211_local *local;
582 int drop_unencrypted;
587 * keep track of whether the HT opmode (stored in
588 * vif.bss_info.ht_operation_mode) is valid.
590 bool ht_opmode_valid;
592 /* to detect idle changes */
595 /* Fragment table for host-based reassembly */
596 struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
597 unsigned int fragment_next;
599 struct ieee80211_key __rcu *keys[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
600 struct ieee80211_key __rcu *default_unicast_key;
601 struct ieee80211_key __rcu *default_multicast_key;
602 struct ieee80211_key __rcu *default_mgmt_key;
605 __be16 control_port_protocol;
606 bool control_port_no_encrypt;
608 struct work_struct work;
609 struct sk_buff_head skb_queue;
611 bool arp_filter_state;
614 * AP this belongs to: self in AP mode and
615 * corresponding AP in VLAN mode, NULL for
616 * all others (might be needed later in IBSS)
618 struct ieee80211_if_ap *bss;
620 /* bitmap of allowed (non-MCS) rate indexes for rate control */
621 u32 rc_rateidx_mask[IEEE80211_NUM_BANDS];
624 struct ieee80211_if_ap ap;
625 struct ieee80211_if_wds wds;
626 struct ieee80211_if_vlan vlan;
627 struct ieee80211_if_managed mgd;
628 struct ieee80211_if_ibss ibss;
629 struct ieee80211_if_mesh mesh;
633 #ifdef CONFIG_MAC80211_DEBUGFS
636 struct dentry *subdir_stations;
637 struct dentry *default_unicast_key;
638 struct dentry *default_multicast_key;
639 struct dentry *default_mgmt_key;
642 /* must be last, dynamically sized area in this! */
643 struct ieee80211_vif vif;
647 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
649 return container_of(p, struct ieee80211_sub_if_data, vif);
652 enum sdata_queue_type {
653 IEEE80211_SDATA_QUEUE_TYPE_FRAME = 0,
654 IEEE80211_SDATA_QUEUE_AGG_START = 1,
655 IEEE80211_SDATA_QUEUE_AGG_STOP = 2,
659 IEEE80211_RX_MSG = 1,
660 IEEE80211_TX_STATUS_MSG = 2,
663 enum queue_stop_reason {
664 IEEE80211_QUEUE_STOP_REASON_DRIVER,
665 IEEE80211_QUEUE_STOP_REASON_PS,
666 IEEE80211_QUEUE_STOP_REASON_CSA,
667 IEEE80211_QUEUE_STOP_REASON_AGGREGATION,
668 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
669 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
672 #ifdef CONFIG_MAC80211_LEDS
673 struct tpt_led_trigger {
674 struct led_trigger trig;
676 const struct ieee80211_tpt_blink *blink_table;
677 unsigned int blink_table_len;
678 struct timer_list timer;
679 unsigned long prev_traffic;
680 unsigned long tx_bytes, rx_bytes;
681 unsigned int active, want;
687 * mac80211 scan flags - currently active scan mode
689 * @SCAN_SW_SCANNING: We're currently in the process of scanning but may as
690 * well be on the operating channel
691 * @SCAN_HW_SCANNING: The hardware is scanning for us, we have no way to
692 * determine if we are on the operating channel or not
693 * @SCAN_COMPLETED: Set for our scan work function when the driver reported
694 * that the scan completed.
695 * @SCAN_ABORTED: Set for our scan work function when the driver reported
696 * a scan complete for an aborted scan.
706 * enum mac80211_scan_state - scan state machine states
708 * @SCAN_DECISION: Main entry point to the scan state machine, this state
709 * determines if we should keep on scanning or switch back to the
711 * @SCAN_SET_CHANNEL: Set the next channel to be scanned
712 * @SCAN_SEND_PROBE: Send probe requests and wait for probe responses
713 * @SCAN_LEAVE_OPER_CHANNEL: Leave the operating channel, notify the AP
714 * about us leaving the channel and stop all associated STA interfaces
715 * @SCAN_ENTER_OPER_CHANNEL: Enter the operating channel again, notify the
716 * AP about us being back and restart all associated STA interfaces
718 enum mac80211_scan_state {
722 SCAN_LEAVE_OPER_CHANNEL,
723 SCAN_ENTER_OPER_CHANNEL,
726 struct ieee80211_local {
727 /* embed the driver visible part.
728 * don't cast (use the static inlines below), but we keep
729 * it first anyway so they become a no-op */
730 struct ieee80211_hw hw;
732 const struct ieee80211_ops *ops;
735 * work stuff, potentially off-channel (in the future)
737 struct list_head work_list;
738 struct timer_list work_timer;
739 struct work_struct work_work;
740 struct sk_buff_head work_skb_queue;
743 * private workqueue to mac80211. mac80211 makes this accessible
744 * via ieee80211_queue_work()
746 struct workqueue_struct *workqueue;
748 unsigned long queue_stop_reasons[IEEE80211_MAX_QUEUES];
749 /* also used to protect ampdu_ac_queue and amdpu_ac_stop_refcnt */
750 spinlock_t queue_stop_reason_lock;
753 int monitors, cooked_mntrs;
754 /* number of interfaces with corresponding FIF_ flags */
755 int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss, fif_pspoll,
758 unsigned int filter_flags; /* FIF_* */
760 bool wiphy_ciphers_allocated;
762 /* protects the aggregated multicast list and filter calls */
763 spinlock_t filter_lock;
765 /* used for uploading changed mc list */
766 struct work_struct reconfig_filter;
768 /* used to reconfigure hardware SM PS */
769 struct work_struct recalc_smps;
771 /* aggregated multicast list */
772 struct netdev_hw_addr_list mc_list;
774 bool tim_in_locked_section; /* see ieee80211_beacon_get() */
777 * suspended is true if we finished all the suspend _and_ we have
778 * not yet come up from resume. This is to be used by mac80211
779 * to ensure driver sanity during suspend and mac80211's own
780 * sanity. It can eventually be used for WoW as well.
785 * Resuming is true while suspended, but when we're reprogramming the
786 * hardware -- at that time it's allowed to use ieee80211_queue_work()
787 * again even though some other parts of the stack are still suspended
788 * and we still drop received frames to avoid waking the stack.
793 * quiescing is true during the suspend process _only_ to
794 * ease timer cancelling etc.
798 /* device is started */
801 /* wowlan is enabled -- don't reconfig on resume */
804 int tx_headroom; /* required headroom for hardware/radiotap */
806 /* Tasklet and skb queue to process calls from IRQ mode. All frames
807 * added to skb_queue will be processed, but frames in
808 * skb_queue_unreliable may be dropped if the total length of these
809 * queues increases over the limit. */
810 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
811 struct tasklet_struct tasklet;
812 struct sk_buff_head skb_queue;
813 struct sk_buff_head skb_queue_unreliable;
816 * Internal FIFO queue which is shared between multiple rx path
817 * stages. Its main task is to provide a serialization mechanism,
818 * so all rx handlers can enjoy having exclusive access to their
819 * private data structures.
821 struct sk_buff_head rx_skb_queue;
822 bool running_rx_handler; /* protected by rx_skb_queue.lock */
826 * The mutex only protects the list and counter,
827 * reads are done in RCU.
828 * Additionally, the lock protects the hash table,
829 * the pending list and each BSS's TIM bitmap.
831 struct mutex sta_mtx;
833 unsigned long num_sta;
834 struct list_head sta_list, sta_pending_list;
835 struct sta_info __rcu *sta_hash[STA_HASH_SIZE];
836 struct timer_list sta_cleanup;
837 struct work_struct sta_finish_work;
840 struct sk_buff_head pending[IEEE80211_MAX_QUEUES];
841 struct tasklet_struct tx_pending_tasklet;
843 atomic_t agg_queue_stop[IEEE80211_MAX_QUEUES];
845 /* number of interfaces with corresponding IFF_ flags */
846 atomic_t iff_allmultis, iff_promiscs;
848 struct rate_control_ref *rate_ctrl;
850 struct crypto_cipher *wep_tx_tfm;
851 struct crypto_cipher *wep_rx_tfm;
855 struct list_head interfaces;
856 struct mutex iflist_mtx;
859 * Key mutex, protects sdata's key_list and sta_info's
860 * key pointers (write access, they're RCU.)
862 struct mutex key_mtx;
864 /* mutex for scan and work locking */
867 /* Scanning and BSS list */
868 unsigned long scanning;
869 struct cfg80211_ssid scan_ssid;
870 struct cfg80211_scan_request *int_scan_req;
871 struct cfg80211_scan_request *scan_req, *hw_scan_req;
872 struct ieee80211_channel *scan_channel;
873 enum ieee80211_band hw_scan_band;
874 int scan_channel_idx;
878 struct ieee80211_sched_scan_ies sched_scan_ies;
879 struct work_struct sched_scan_stopped_work;
881 unsigned long leave_oper_channel_time;
882 enum mac80211_scan_state next_scan_state;
883 struct delayed_work scan_work;
884 struct ieee80211_sub_if_data *scan_sdata;
885 enum nl80211_channel_type _oper_channel_type;
886 struct ieee80211_channel *oper_channel, *csa_channel;
888 /* Temporary remain-on-channel for off-channel operations */
889 struct ieee80211_channel *tmp_channel;
890 enum nl80211_channel_type tmp_channel_type;
893 /* dot11CountersTable */
894 u32 dot11TransmittedFragmentCount;
895 u32 dot11MulticastTransmittedFrameCount;
896 u32 dot11FailedCount;
898 u32 dot11MultipleRetryCount;
899 u32 dot11FrameDuplicateCount;
900 u32 dot11ReceivedFragmentCount;
901 u32 dot11MulticastReceivedFrameCount;
902 u32 dot11TransmittedFrameCount;
904 #ifdef CONFIG_MAC80211_LEDS
905 int tx_led_counter, rx_led_counter;
906 struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led;
907 struct tpt_led_trigger *tpt_led_trigger;
908 char tx_led_name[32], rx_led_name[32],
909 assoc_led_name[32], radio_led_name[32];
912 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
913 /* TX/RX handler statistics */
914 unsigned int tx_handlers_drop;
915 unsigned int tx_handlers_queued;
916 unsigned int tx_handlers_drop_unencrypted;
917 unsigned int tx_handlers_drop_fragment;
918 unsigned int tx_handlers_drop_wep;
919 unsigned int tx_handlers_drop_not_assoc;
920 unsigned int tx_handlers_drop_unauth_port;
921 unsigned int rx_handlers_drop;
922 unsigned int rx_handlers_queued;
923 unsigned int rx_handlers_drop_nullfunc;
924 unsigned int rx_handlers_drop_defrag;
925 unsigned int rx_handlers_drop_short;
926 unsigned int rx_handlers_drop_passive_scan;
927 unsigned int tx_expand_skb_head;
928 unsigned int tx_expand_skb_head_cloned;
929 unsigned int rx_expand_skb_head;
930 unsigned int rx_expand_skb_head2;
931 unsigned int rx_handlers_fragments;
932 unsigned int tx_status_drop;
933 #define I802_DEBUG_INC(c) (c)++
934 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
935 #define I802_DEBUG_INC(c) do { } while (0)
936 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
939 int total_ps_buffered; /* total number of all buffered unicast and
940 * multicast packets for power saving stations
942 int wifi_wme_noack_test;
943 unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */
946 * Bitmask of enabled u-apsd queues,
947 * IEEE80211_WMM_IE_STA_QOSINFO_AC_BE & co. Needs a new association
950 unsigned int uapsd_queues;
953 * Maximum number of buffered frames AP can deliver during a
954 * service period, IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL or similar.
955 * Needs a new association to take effect.
957 unsigned int uapsd_max_sp_len;
960 bool offchannel_ps_enabled;
962 * PS can only be enabled when we have exactly one managed
963 * interface (and monitors) in PS, this then points there.
965 struct ieee80211_sub_if_data *ps_sdata;
966 struct work_struct dynamic_ps_enable_work;
967 struct work_struct dynamic_ps_disable_work;
968 struct timer_list dynamic_ps_timer;
969 struct notifier_block network_latency_notifier;
970 struct notifier_block ifa_notifier;
973 * The dynamic ps timeout configured from user space via WEXT -
974 * this will override whatever chosen by mac80211 internally.
976 int dynamic_ps_forced_timeout;
977 int dynamic_ps_user_timeout;
978 bool disable_dynamic_ps;
980 int user_power_level; /* in dBm */
981 int power_constr_level; /* in dBm */
983 enum ieee80211_smps_mode smps_mode;
985 struct work_struct restart_work;
987 #ifdef CONFIG_MAC80211_DEBUGFS
988 struct local_debugfsdentries {
989 struct dentry *rcdir;
994 struct ieee80211_channel *hw_roc_channel;
995 struct net_device *hw_roc_dev;
996 struct sk_buff *hw_roc_skb, *hw_roc_skb_for_status;
997 struct work_struct hw_roc_start, hw_roc_done;
998 enum nl80211_channel_type hw_roc_channel_type;
999 unsigned int hw_roc_duration;
1002 unsigned long hw_offchan_tx_cookie;
1004 /* dummy netdev for use w/ NAPI */
1005 struct net_device napi_dev;
1007 struct napi_struct napi;
1010 static inline struct ieee80211_sub_if_data *
1011 IEEE80211_DEV_TO_SUB_IF(struct net_device *dev)
1013 return netdev_priv(dev);
1016 /* this struct represents 802.11n's RA/TID combination */
1017 struct ieee80211_ra_tid {
1022 /* Parsed Information Elements */
1023 struct ieee802_11_elems {
1027 /* pointers to IEs */
1033 struct ieee80211_tim_ie *tim;
1042 struct ieee80211_ht_cap *ht_cap_elem;
1043 struct ieee80211_ht_info *ht_info_elem;
1044 struct ieee80211_meshconf_ie *mesh_config;
1050 struct ieee80211_rann_ie *rann;
1053 u8 *pwr_constr_elem;
1054 u8 *quiet_elem; /* first quite element */
1057 /* length of them, respectively */
1069 u8 ext_supp_rates_len;
1077 u8 ch_switch_elem_len;
1078 u8 country_elem_len;
1079 u8 pwr_constr_elem_len;
1081 u8 num_of_quiet_elem; /* can be more the one */
1085 static inline struct ieee80211_local *hw_to_local(
1086 struct ieee80211_hw *hw)
1088 return container_of(hw, struct ieee80211_local, hw);
1091 static inline struct ieee80211_hw *local_to_hw(
1092 struct ieee80211_local *local)
1098 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
1100 return compare_ether_addr(raddr, addr) == 0 ||
1101 is_broadcast_ether_addr(raddr);
1105 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed);
1106 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
1107 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
1109 void ieee80211_configure_filter(struct ieee80211_local *local);
1110 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
1113 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata);
1114 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
1115 struct cfg80211_auth_request *req);
1116 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
1117 struct cfg80211_assoc_request *req);
1118 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
1119 struct cfg80211_deauth_request *req,
1121 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
1122 struct cfg80211_disassoc_request *req,
1124 void ieee80211_send_pspoll(struct ieee80211_local *local,
1125 struct ieee80211_sub_if_data *sdata);
1126 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency);
1127 int ieee80211_max_network_latency(struct notifier_block *nb,
1128 unsigned long data, void *dummy);
1129 int ieee80211_set_arp_filter(struct ieee80211_sub_if_data *sdata);
1130 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1131 struct ieee80211_channel_sw_ie *sw_elem,
1132 struct ieee80211_bss *bss,
1134 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata);
1135 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata);
1136 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata);
1137 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1138 struct sk_buff *skb);
1139 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata);
1140 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata);
1143 void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local);
1144 void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata);
1145 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
1146 u8 *bssid, u8 *addr, u32 supp_rates,
1148 int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
1149 struct cfg80211_ibss_params *params);
1150 int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata);
1151 void ieee80211_ibss_quiesce(struct ieee80211_sub_if_data *sdata);
1152 void ieee80211_ibss_restart(struct ieee80211_sub_if_data *sdata);
1153 void ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata);
1154 void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1155 struct sk_buff *skb);
1158 void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata);
1159 void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1160 struct sk_buff *skb);
1162 /* scan/BSS handling */
1163 void ieee80211_scan_work(struct work_struct *work);
1164 int ieee80211_request_internal_scan(struct ieee80211_sub_if_data *sdata,
1165 const u8 *ssid, u8 ssid_len,
1166 struct ieee80211_channel *chan);
1167 int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
1168 struct cfg80211_scan_request *req);
1169 void ieee80211_scan_cancel(struct ieee80211_local *local);
1171 ieee80211_scan_rx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
1173 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local);
1174 struct ieee80211_bss *
1175 ieee80211_bss_info_update(struct ieee80211_local *local,
1176 struct ieee80211_rx_status *rx_status,
1177 struct ieee80211_mgmt *mgmt,
1179 struct ieee802_11_elems *elems,
1180 struct ieee80211_channel *channel,
1182 struct ieee80211_bss *
1183 ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq,
1184 u8 *ssid, u8 ssid_len);
1185 void ieee80211_rx_bss_put(struct ieee80211_local *local,
1186 struct ieee80211_bss *bss);
1188 /* scheduled scan handling */
1189 int ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata,
1190 struct cfg80211_sched_scan_request *req);
1191 int ieee80211_request_sched_scan_stop(struct ieee80211_sub_if_data *sdata);
1192 void ieee80211_sched_scan_stopped_work(struct work_struct *work);
1194 /* off-channel helpers */
1195 bool ieee80211_cfg_on_oper_channel(struct ieee80211_local *local);
1196 void ieee80211_offchannel_enable_all_ps(struct ieee80211_local *local,
1198 void ieee80211_offchannel_stop_vifs(struct ieee80211_local *local,
1199 bool offchannel_ps_enable);
1200 void ieee80211_offchannel_return(struct ieee80211_local *local,
1201 bool enable_beaconing,
1202 bool offchannel_ps_disable);
1203 void ieee80211_hw_roc_setup(struct ieee80211_local *local);
1205 /* interface handling */
1206 int ieee80211_iface_init(void);
1207 void ieee80211_iface_exit(void);
1208 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1209 struct net_device **new_dev, enum nl80211_iftype type,
1210 struct vif_params *params);
1211 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1212 enum nl80211_iftype type);
1213 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata);
1214 void ieee80211_remove_interfaces(struct ieee80211_local *local);
1215 u32 __ieee80211_recalc_idle(struct ieee80211_local *local);
1216 void ieee80211_recalc_idle(struct ieee80211_local *local);
1217 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
1220 static inline bool ieee80211_sdata_running(struct ieee80211_sub_if_data *sdata)
1222 return test_bit(SDATA_STATE_RUNNING, &sdata->state);
1226 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
1227 void ieee80211_tx_pending(unsigned long data);
1228 netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
1229 struct net_device *dev);
1230 netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
1231 struct net_device *dev);
1234 * radiotap header for status frames
1236 struct ieee80211_tx_status_rtap_hdr {
1237 struct ieee80211_radiotap_header hdr;
1239 u8 padding_for_rate;
1246 void ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_supported_band *sband,
1247 struct ieee80211_ht_cap *ht_cap_ie,
1248 struct ieee80211_sta_ht_cap *ht_cap);
1249 void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn);
1250 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
1251 const u8 *da, u16 tid,
1252 u16 initiator, u16 reason_code);
1253 int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata,
1254 enum ieee80211_smps_mode smps, const u8 *da,
1256 void ieee80211_request_smps_work(struct work_struct *work);
1258 void ___ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1259 u16 initiator, u16 reason, bool stop);
1260 void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1261 u16 initiator, u16 reason, bool stop);
1262 void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta, bool tx);
1263 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
1264 struct sta_info *sta,
1265 struct ieee80211_mgmt *mgmt, size_t len);
1266 void ieee80211_process_addba_resp(struct ieee80211_local *local,
1267 struct sta_info *sta,
1268 struct ieee80211_mgmt *mgmt,
1270 void ieee80211_process_addba_request(struct ieee80211_local *local,
1271 struct sta_info *sta,
1272 struct ieee80211_mgmt *mgmt,
1275 int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1276 enum ieee80211_back_parties initiator,
1278 int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1279 enum ieee80211_back_parties initiator,
1281 void ieee80211_start_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u16 tid);
1282 void ieee80211_stop_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u8 tid);
1283 void ieee80211_ba_session_work(struct work_struct *work);
1284 void ieee80211_tx_ba_session_handle_start(struct sta_info *sta, int tid);
1285 void ieee80211_release_reorder_timeout(struct sta_info *sta, int tid);
1287 /* Spectrum management */
1288 void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata,
1289 struct ieee80211_mgmt *mgmt,
1292 /* Suspend/resume and hw reconfiguration */
1293 int ieee80211_reconfig(struct ieee80211_local *local);
1294 void ieee80211_stop_device(struct ieee80211_local *local);
1297 int __ieee80211_suspend(struct ieee80211_hw *hw,
1298 struct cfg80211_wowlan *wowlan);
1300 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
1302 struct ieee80211_local *local = hw_to_local(hw);
1304 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
1305 "%s: resume with hardware scan still in progress\n",
1306 wiphy_name(hw->wiphy));
1308 return ieee80211_reconfig(hw_to_local(hw));
1311 static inline int __ieee80211_suspend(struct ieee80211_hw *hw,
1312 struct cfg80211_wowlan *wowlan)
1317 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
1323 /* utility functions/constants */
1324 extern void *mac80211_wiphy_privid; /* for wiphy privid */
1325 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
1326 enum nl80211_iftype type);
1327 int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
1328 int rate, int erp, int short_preamble);
1329 void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx,
1330 struct ieee80211_hdr *hdr, const u8 *tsc,
1332 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata);
1333 void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
1334 void ieee802_11_parse_elems(u8 *start, size_t len,
1335 struct ieee802_11_elems *elems);
1336 u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
1337 struct ieee802_11_elems *elems,
1338 u64 filter, u32 crc);
1339 u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
1340 enum ieee80211_band band);
1342 void ieee80211_dynamic_ps_enable_work(struct work_struct *work);
1343 void ieee80211_dynamic_ps_disable_work(struct work_struct *work);
1344 void ieee80211_dynamic_ps_timer(unsigned long data);
1345 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1346 struct ieee80211_sub_if_data *sdata,
1348 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1349 struct ieee80211_hdr *hdr);
1350 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1351 struct ieee80211_hdr *hdr, bool ack);
1352 void ieee80211_beacon_connection_loss_work(struct work_struct *work);
1354 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
1355 enum queue_stop_reason reason);
1356 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
1357 enum queue_stop_reason reason);
1358 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
1359 enum queue_stop_reason reason);
1360 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
1361 enum queue_stop_reason reason);
1362 void ieee80211_add_pending_skb(struct ieee80211_local *local,
1363 struct sk_buff *skb);
1364 int ieee80211_add_pending_skbs(struct ieee80211_local *local,
1365 struct sk_buff_head *skbs);
1366 int ieee80211_add_pending_skbs_fn(struct ieee80211_local *local,
1367 struct sk_buff_head *skbs,
1368 void (*fn)(void *data), void *data);
1370 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1371 u16 transaction, u16 auth_alg,
1372 u8 *extra, size_t extra_len, const u8 *bssid,
1373 const u8 *key, u8 key_len, u8 key_idx);
1374 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1375 const u8 *ie, size_t ie_len,
1376 enum ieee80211_band band, u32 rate_mask,
1378 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1380 const u8 *ssid, size_t ssid_len,
1381 const u8 *ie, size_t ie_len,
1383 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1384 const u8 *ssid, size_t ssid_len,
1385 const u8 *ie, size_t ie_len,
1388 void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
1389 const size_t supp_rates_len,
1390 const u8 *supp_rates);
1391 u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
1392 struct ieee802_11_elems *elems,
1393 enum ieee80211_band band);
1394 int __ieee80211_request_smps(struct ieee80211_sub_if_data *sdata,
1395 enum ieee80211_smps_mode smps_mode);
1396 void ieee80211_recalc_smps(struct ieee80211_local *local);
1398 size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
1399 const u8 *ids, int n_ids, size_t offset);
1400 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset);
1402 /* internal work items */
1403 void ieee80211_work_init(struct ieee80211_local *local);
1404 void ieee80211_add_work(struct ieee80211_work *wk);
1405 void free_work(struct ieee80211_work *wk);
1406 void ieee80211_work_purge(struct ieee80211_sub_if_data *sdata);
1407 ieee80211_rx_result ieee80211_work_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1408 struct sk_buff *skb);
1409 int ieee80211_wk_remain_on_channel(struct ieee80211_sub_if_data *sdata,
1410 struct ieee80211_channel *chan,
1411 enum nl80211_channel_type channel_type,
1412 unsigned int duration, u64 *cookie);
1413 int ieee80211_wk_cancel_remain_on_channel(
1414 struct ieee80211_sub_if_data *sdata, u64 cookie);
1416 /* channel management */
1417 enum ieee80211_chan_mode {
1418 CHAN_MODE_UNDEFINED,
1423 enum ieee80211_chan_mode
1424 ieee80211_get_channel_mode(struct ieee80211_local *local,
1425 struct ieee80211_sub_if_data *ignore);
1426 bool ieee80211_set_channel_type(struct ieee80211_local *local,
1427 struct ieee80211_sub_if_data *sdata,
1428 enum nl80211_channel_type chantype);
1430 #ifdef CONFIG_MAC80211_NOINLINE
1431 #define debug_noinline noinline
1433 #define debug_noinline
1436 #endif /* IEEE80211_I_H */