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.
542 enum ieee80211_sub_if_data_flags {
543 IEEE80211_SDATA_ALLMULTI = BIT(0),
544 IEEE80211_SDATA_PROMISC = BIT(1),
545 IEEE80211_SDATA_OPERATING_GMODE = BIT(2),
546 IEEE80211_SDATA_DONT_BRIDGE_PACKETS = BIT(3),
550 * enum ieee80211_sdata_state_bits - virtual interface state bits
551 * @SDATA_STATE_RUNNING: virtual interface is up & running; this
552 * mirrors netif_running() but is separate for interface type
553 * change handling while the interface is up
554 * @SDATA_STATE_OFFCHANNEL: This interface is currently in offchannel
555 * mode, so queues are stopped
557 enum ieee80211_sdata_state_bits {
559 SDATA_STATE_OFFCHANNEL,
562 struct ieee80211_sub_if_data {
563 struct list_head list;
565 struct wireless_dev wdev;
568 struct list_head key_list;
570 /* count for keys needing tailroom space allocation */
571 int crypto_tx_tailroom_needed_cnt;
573 struct net_device *dev;
574 struct ieee80211_local *local;
580 int drop_unencrypted;
585 * keep track of whether the HT opmode (stored in
586 * vif.bss_info.ht_operation_mode) is valid.
588 bool ht_opmode_valid;
590 /* to detect idle changes */
593 /* Fragment table for host-based reassembly */
594 struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
595 unsigned int fragment_next;
597 struct ieee80211_key __rcu *keys[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
598 struct ieee80211_key __rcu *default_unicast_key;
599 struct ieee80211_key __rcu *default_multicast_key;
600 struct ieee80211_key __rcu *default_mgmt_key;
603 __be16 control_port_protocol;
604 bool control_port_no_encrypt;
606 struct work_struct work;
607 struct sk_buff_head skb_queue;
609 bool arp_filter_state;
612 * AP this belongs to: self in AP mode and
613 * corresponding AP in VLAN mode, NULL for
614 * all others (might be needed later in IBSS)
616 struct ieee80211_if_ap *bss;
618 /* bitmap of allowed (non-MCS) rate indexes for rate control */
619 u32 rc_rateidx_mask[IEEE80211_NUM_BANDS];
622 struct ieee80211_if_ap ap;
623 struct ieee80211_if_wds wds;
624 struct ieee80211_if_vlan vlan;
625 struct ieee80211_if_managed mgd;
626 struct ieee80211_if_ibss ibss;
627 struct ieee80211_if_mesh mesh;
631 #ifdef CONFIG_MAC80211_DEBUGFS
634 struct dentry *subdir_stations;
635 struct dentry *default_unicast_key;
636 struct dentry *default_multicast_key;
637 struct dentry *default_mgmt_key;
640 /* must be last, dynamically sized area in this! */
641 struct ieee80211_vif vif;
645 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
647 return container_of(p, struct ieee80211_sub_if_data, vif);
650 enum sdata_queue_type {
651 IEEE80211_SDATA_QUEUE_TYPE_FRAME = 0,
652 IEEE80211_SDATA_QUEUE_AGG_START = 1,
653 IEEE80211_SDATA_QUEUE_AGG_STOP = 2,
657 IEEE80211_RX_MSG = 1,
658 IEEE80211_TX_STATUS_MSG = 2,
661 enum queue_stop_reason {
662 IEEE80211_QUEUE_STOP_REASON_DRIVER,
663 IEEE80211_QUEUE_STOP_REASON_PS,
664 IEEE80211_QUEUE_STOP_REASON_CSA,
665 IEEE80211_QUEUE_STOP_REASON_AGGREGATION,
666 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
667 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
670 #ifdef CONFIG_MAC80211_LEDS
671 struct tpt_led_trigger {
672 struct led_trigger trig;
674 const struct ieee80211_tpt_blink *blink_table;
675 unsigned int blink_table_len;
676 struct timer_list timer;
677 unsigned long prev_traffic;
678 unsigned long tx_bytes, rx_bytes;
679 unsigned int active, want;
685 * mac80211 scan flags - currently active scan mode
687 * @SCAN_SW_SCANNING: We're currently in the process of scanning but may as
688 * well be on the operating channel
689 * @SCAN_HW_SCANNING: The hardware is scanning for us, we have no way to
690 * determine if we are on the operating channel or not
691 * @SCAN_COMPLETED: Set for our scan work function when the driver reported
692 * that the scan completed.
693 * @SCAN_ABORTED: Set for our scan work function when the driver reported
694 * a scan complete for an aborted scan.
704 * enum mac80211_scan_state - scan state machine states
706 * @SCAN_DECISION: Main entry point to the scan state machine, this state
707 * determines if we should keep on scanning or switch back to the
709 * @SCAN_SET_CHANNEL: Set the next channel to be scanned
710 * @SCAN_SEND_PROBE: Send probe requests and wait for probe responses
711 * @SCAN_LEAVE_OPER_CHANNEL: Leave the operating channel, notify the AP
712 * about us leaving the channel and stop all associated STA interfaces
713 * @SCAN_ENTER_OPER_CHANNEL: Enter the operating channel again, notify the
714 * AP about us being back and restart all associated STA interfaces
716 enum mac80211_scan_state {
720 SCAN_LEAVE_OPER_CHANNEL,
721 SCAN_ENTER_OPER_CHANNEL,
724 struct ieee80211_local {
725 /* embed the driver visible part.
726 * don't cast (use the static inlines below), but we keep
727 * it first anyway so they become a no-op */
728 struct ieee80211_hw hw;
730 const struct ieee80211_ops *ops;
733 * work stuff, potentially off-channel (in the future)
735 struct list_head work_list;
736 struct timer_list work_timer;
737 struct work_struct work_work;
738 struct sk_buff_head work_skb_queue;
741 * private workqueue to mac80211. mac80211 makes this accessible
742 * via ieee80211_queue_work()
744 struct workqueue_struct *workqueue;
746 unsigned long queue_stop_reasons[IEEE80211_MAX_QUEUES];
747 /* also used to protect ampdu_ac_queue and amdpu_ac_stop_refcnt */
748 spinlock_t queue_stop_reason_lock;
751 int monitors, cooked_mntrs;
752 /* number of interfaces with corresponding FIF_ flags */
753 int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss, fif_pspoll,
756 unsigned int filter_flags; /* FIF_* */
758 bool wiphy_ciphers_allocated;
760 /* protects the aggregated multicast list and filter calls */
761 spinlock_t filter_lock;
763 /* used for uploading changed mc list */
764 struct work_struct reconfig_filter;
766 /* used to reconfigure hardware SM PS */
767 struct work_struct recalc_smps;
769 /* aggregated multicast list */
770 struct netdev_hw_addr_list mc_list;
772 bool tim_in_locked_section; /* see ieee80211_beacon_get() */
775 * suspended is true if we finished all the suspend _and_ we have
776 * not yet come up from resume. This is to be used by mac80211
777 * to ensure driver sanity during suspend and mac80211's own
778 * sanity. It can eventually be used for WoW as well.
783 * Resuming is true while suspended, but when we're reprogramming the
784 * hardware -- at that time it's allowed to use ieee80211_queue_work()
785 * again even though some other parts of the stack are still suspended
786 * and we still drop received frames to avoid waking the stack.
791 * quiescing is true during the suspend process _only_ to
792 * ease timer cancelling etc.
796 /* device is started */
799 /* wowlan is enabled -- don't reconfig on resume */
802 int tx_headroom; /* required headroom for hardware/radiotap */
804 /* Tasklet and skb queue to process calls from IRQ mode. All frames
805 * added to skb_queue will be processed, but frames in
806 * skb_queue_unreliable may be dropped if the total length of these
807 * queues increases over the limit. */
808 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
809 struct tasklet_struct tasklet;
810 struct sk_buff_head skb_queue;
811 struct sk_buff_head skb_queue_unreliable;
814 * Internal FIFO queue which is shared between multiple rx path
815 * stages. Its main task is to provide a serialization mechanism,
816 * so all rx handlers can enjoy having exclusive access to their
817 * private data structures.
819 struct sk_buff_head rx_skb_queue;
820 bool running_rx_handler; /* protected by rx_skb_queue.lock */
824 * The mutex only protects the list and counter,
825 * reads are done in RCU.
826 * Additionally, the lock protects the hash table,
827 * the pending list and each BSS's TIM bitmap.
829 struct mutex sta_mtx;
831 unsigned long num_sta;
832 struct list_head sta_list, sta_pending_list;
833 struct sta_info __rcu *sta_hash[STA_HASH_SIZE];
834 struct timer_list sta_cleanup;
835 struct work_struct sta_finish_work;
838 struct sk_buff_head pending[IEEE80211_MAX_QUEUES];
839 struct tasklet_struct tx_pending_tasklet;
841 atomic_t agg_queue_stop[IEEE80211_MAX_QUEUES];
843 /* number of interfaces with corresponding IFF_ flags */
844 atomic_t iff_allmultis, iff_promiscs;
846 struct rate_control_ref *rate_ctrl;
848 struct crypto_cipher *wep_tx_tfm;
849 struct crypto_cipher *wep_rx_tfm;
853 struct list_head interfaces;
854 struct mutex iflist_mtx;
857 * Key mutex, protects sdata's key_list and sta_info's
858 * key pointers (write access, they're RCU.)
860 struct mutex key_mtx;
862 /* mutex for scan and work locking */
865 /* Scanning and BSS list */
866 unsigned long scanning;
867 struct cfg80211_ssid scan_ssid;
868 struct cfg80211_scan_request *int_scan_req;
869 struct cfg80211_scan_request *scan_req, *hw_scan_req;
870 struct ieee80211_channel *scan_channel;
871 enum ieee80211_band hw_scan_band;
872 int scan_channel_idx;
876 struct ieee80211_sched_scan_ies sched_scan_ies;
877 struct work_struct sched_scan_stopped_work;
879 unsigned long leave_oper_channel_time;
880 enum mac80211_scan_state next_scan_state;
881 struct delayed_work scan_work;
882 struct ieee80211_sub_if_data *scan_sdata;
883 enum nl80211_channel_type _oper_channel_type;
884 struct ieee80211_channel *oper_channel, *csa_channel;
886 /* Temporary remain-on-channel for off-channel operations */
887 struct ieee80211_channel *tmp_channel;
888 enum nl80211_channel_type tmp_channel_type;
891 /* dot11CountersTable */
892 u32 dot11TransmittedFragmentCount;
893 u32 dot11MulticastTransmittedFrameCount;
894 u32 dot11FailedCount;
896 u32 dot11MultipleRetryCount;
897 u32 dot11FrameDuplicateCount;
898 u32 dot11ReceivedFragmentCount;
899 u32 dot11MulticastReceivedFrameCount;
900 u32 dot11TransmittedFrameCount;
902 #ifdef CONFIG_MAC80211_LEDS
903 int tx_led_counter, rx_led_counter;
904 struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led;
905 struct tpt_led_trigger *tpt_led_trigger;
906 char tx_led_name[32], rx_led_name[32],
907 assoc_led_name[32], radio_led_name[32];
910 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
911 /* TX/RX handler statistics */
912 unsigned int tx_handlers_drop;
913 unsigned int tx_handlers_queued;
914 unsigned int tx_handlers_drop_unencrypted;
915 unsigned int tx_handlers_drop_fragment;
916 unsigned int tx_handlers_drop_wep;
917 unsigned int tx_handlers_drop_not_assoc;
918 unsigned int tx_handlers_drop_unauth_port;
919 unsigned int rx_handlers_drop;
920 unsigned int rx_handlers_queued;
921 unsigned int rx_handlers_drop_nullfunc;
922 unsigned int rx_handlers_drop_defrag;
923 unsigned int rx_handlers_drop_short;
924 unsigned int rx_handlers_drop_passive_scan;
925 unsigned int tx_expand_skb_head;
926 unsigned int tx_expand_skb_head_cloned;
927 unsigned int rx_expand_skb_head;
928 unsigned int rx_expand_skb_head2;
929 unsigned int rx_handlers_fragments;
930 unsigned int tx_status_drop;
931 #define I802_DEBUG_INC(c) (c)++
932 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
933 #define I802_DEBUG_INC(c) do { } while (0)
934 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
937 int total_ps_buffered; /* total number of all buffered unicast and
938 * multicast packets for power saving stations
940 int wifi_wme_noack_test;
941 unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */
944 * Bitmask of enabled u-apsd queues,
945 * IEEE80211_WMM_IE_STA_QOSINFO_AC_BE & co. Needs a new association
948 unsigned int uapsd_queues;
951 * Maximum number of buffered frames AP can deliver during a
952 * service period, IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL or similar.
953 * Needs a new association to take effect.
955 unsigned int uapsd_max_sp_len;
958 bool offchannel_ps_enabled;
960 * PS can only be enabled when we have exactly one managed
961 * interface (and monitors) in PS, this then points there.
963 struct ieee80211_sub_if_data *ps_sdata;
964 struct work_struct dynamic_ps_enable_work;
965 struct work_struct dynamic_ps_disable_work;
966 struct timer_list dynamic_ps_timer;
967 struct notifier_block network_latency_notifier;
968 struct notifier_block ifa_notifier;
971 * The dynamic ps timeout configured from user space via WEXT -
972 * this will override whatever chosen by mac80211 internally.
974 int dynamic_ps_forced_timeout;
975 int dynamic_ps_user_timeout;
976 bool disable_dynamic_ps;
978 int user_power_level; /* in dBm */
979 int power_constr_level; /* in dBm */
981 enum ieee80211_smps_mode smps_mode;
983 struct work_struct restart_work;
985 #ifdef CONFIG_MAC80211_DEBUGFS
986 struct local_debugfsdentries {
987 struct dentry *rcdir;
992 struct ieee80211_channel *hw_roc_channel;
993 struct net_device *hw_roc_dev;
994 struct sk_buff *hw_roc_skb, *hw_roc_skb_for_status;
995 struct work_struct hw_roc_start, hw_roc_done;
996 enum nl80211_channel_type hw_roc_channel_type;
997 unsigned int hw_roc_duration;
1000 unsigned long hw_offchan_tx_cookie;
1002 /* dummy netdev for use w/ NAPI */
1003 struct net_device napi_dev;
1005 struct napi_struct napi;
1008 static inline struct ieee80211_sub_if_data *
1009 IEEE80211_DEV_TO_SUB_IF(struct net_device *dev)
1011 return netdev_priv(dev);
1014 /* this struct represents 802.11n's RA/TID combination */
1015 struct ieee80211_ra_tid {
1020 /* Parsed Information Elements */
1021 struct ieee802_11_elems {
1025 /* pointers to IEs */
1031 struct ieee80211_tim_ie *tim;
1040 struct ieee80211_ht_cap *ht_cap_elem;
1041 struct ieee80211_ht_info *ht_info_elem;
1042 struct ieee80211_meshconf_ie *mesh_config;
1048 struct ieee80211_rann_ie *rann;
1051 u8 *pwr_constr_elem;
1052 u8 *quiet_elem; /* first quite element */
1055 /* length of them, respectively */
1067 u8 ext_supp_rates_len;
1075 u8 ch_switch_elem_len;
1076 u8 country_elem_len;
1077 u8 pwr_constr_elem_len;
1079 u8 num_of_quiet_elem; /* can be more the one */
1083 static inline struct ieee80211_local *hw_to_local(
1084 struct ieee80211_hw *hw)
1086 return container_of(hw, struct ieee80211_local, hw);
1089 static inline struct ieee80211_hw *local_to_hw(
1090 struct ieee80211_local *local)
1096 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
1098 return compare_ether_addr(raddr, addr) == 0 ||
1099 is_broadcast_ether_addr(raddr);
1103 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed);
1104 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
1105 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
1107 void ieee80211_configure_filter(struct ieee80211_local *local);
1108 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
1111 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata);
1112 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
1113 struct cfg80211_auth_request *req);
1114 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
1115 struct cfg80211_assoc_request *req);
1116 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
1117 struct cfg80211_deauth_request *req,
1119 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
1120 struct cfg80211_disassoc_request *req,
1122 void ieee80211_send_pspoll(struct ieee80211_local *local,
1123 struct ieee80211_sub_if_data *sdata);
1124 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency);
1125 int ieee80211_max_network_latency(struct notifier_block *nb,
1126 unsigned long data, void *dummy);
1127 int ieee80211_set_arp_filter(struct ieee80211_sub_if_data *sdata);
1128 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1129 struct ieee80211_channel_sw_ie *sw_elem,
1130 struct ieee80211_bss *bss,
1132 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata);
1133 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata);
1134 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata);
1135 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1136 struct sk_buff *skb);
1137 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata);
1138 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata);
1141 void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local);
1142 void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata);
1143 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
1144 u8 *bssid, u8 *addr, u32 supp_rates,
1146 int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
1147 struct cfg80211_ibss_params *params);
1148 int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata);
1149 void ieee80211_ibss_quiesce(struct ieee80211_sub_if_data *sdata);
1150 void ieee80211_ibss_restart(struct ieee80211_sub_if_data *sdata);
1151 void ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata);
1152 void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1153 struct sk_buff *skb);
1156 void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata);
1157 void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1158 struct sk_buff *skb);
1160 /* scan/BSS handling */
1161 void ieee80211_scan_work(struct work_struct *work);
1162 int ieee80211_request_internal_scan(struct ieee80211_sub_if_data *sdata,
1163 const u8 *ssid, u8 ssid_len,
1164 struct ieee80211_channel *chan);
1165 int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
1166 struct cfg80211_scan_request *req);
1167 void ieee80211_scan_cancel(struct ieee80211_local *local);
1169 ieee80211_scan_rx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
1171 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local);
1172 struct ieee80211_bss *
1173 ieee80211_bss_info_update(struct ieee80211_local *local,
1174 struct ieee80211_rx_status *rx_status,
1175 struct ieee80211_mgmt *mgmt,
1177 struct ieee802_11_elems *elems,
1178 struct ieee80211_channel *channel,
1180 struct ieee80211_bss *
1181 ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq,
1182 u8 *ssid, u8 ssid_len);
1183 void ieee80211_rx_bss_put(struct ieee80211_local *local,
1184 struct ieee80211_bss *bss);
1186 /* scheduled scan handling */
1187 int ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata,
1188 struct cfg80211_sched_scan_request *req);
1189 int ieee80211_request_sched_scan_stop(struct ieee80211_sub_if_data *sdata);
1190 void ieee80211_sched_scan_stopped_work(struct work_struct *work);
1192 /* off-channel helpers */
1193 bool ieee80211_cfg_on_oper_channel(struct ieee80211_local *local);
1194 void ieee80211_offchannel_enable_all_ps(struct ieee80211_local *local,
1196 void ieee80211_offchannel_stop_vifs(struct ieee80211_local *local,
1197 bool offchannel_ps_enable);
1198 void ieee80211_offchannel_return(struct ieee80211_local *local,
1199 bool enable_beaconing,
1200 bool offchannel_ps_disable);
1201 void ieee80211_hw_roc_setup(struct ieee80211_local *local);
1203 /* interface handling */
1204 int ieee80211_iface_init(void);
1205 void ieee80211_iface_exit(void);
1206 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1207 struct net_device **new_dev, enum nl80211_iftype type,
1208 struct vif_params *params);
1209 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1210 enum nl80211_iftype type);
1211 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata);
1212 void ieee80211_remove_interfaces(struct ieee80211_local *local);
1213 u32 __ieee80211_recalc_idle(struct ieee80211_local *local);
1214 void ieee80211_recalc_idle(struct ieee80211_local *local);
1215 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
1218 static inline bool ieee80211_sdata_running(struct ieee80211_sub_if_data *sdata)
1220 return test_bit(SDATA_STATE_RUNNING, &sdata->state);
1224 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
1225 void ieee80211_tx_pending(unsigned long data);
1226 netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
1227 struct net_device *dev);
1228 netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
1229 struct net_device *dev);
1232 * radiotap header for status frames
1234 struct ieee80211_tx_status_rtap_hdr {
1235 struct ieee80211_radiotap_header hdr;
1237 u8 padding_for_rate;
1244 void ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_supported_band *sband,
1245 struct ieee80211_ht_cap *ht_cap_ie,
1246 struct ieee80211_sta_ht_cap *ht_cap);
1247 void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn);
1248 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
1249 const u8 *da, u16 tid,
1250 u16 initiator, u16 reason_code);
1251 int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata,
1252 enum ieee80211_smps_mode smps, const u8 *da,
1254 void ieee80211_request_smps_work(struct work_struct *work);
1256 void ___ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1257 u16 initiator, u16 reason, bool stop);
1258 void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1259 u16 initiator, u16 reason, bool stop);
1260 void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta, bool tx);
1261 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
1262 struct sta_info *sta,
1263 struct ieee80211_mgmt *mgmt, size_t len);
1264 void ieee80211_process_addba_resp(struct ieee80211_local *local,
1265 struct sta_info *sta,
1266 struct ieee80211_mgmt *mgmt,
1268 void ieee80211_process_addba_request(struct ieee80211_local *local,
1269 struct sta_info *sta,
1270 struct ieee80211_mgmt *mgmt,
1273 int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1274 enum ieee80211_back_parties initiator,
1276 int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1277 enum ieee80211_back_parties initiator,
1279 void ieee80211_start_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u16 tid);
1280 void ieee80211_stop_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u8 tid);
1281 void ieee80211_ba_session_work(struct work_struct *work);
1282 void ieee80211_tx_ba_session_handle_start(struct sta_info *sta, int tid);
1283 void ieee80211_release_reorder_timeout(struct sta_info *sta, int tid);
1285 /* Spectrum management */
1286 void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata,
1287 struct ieee80211_mgmt *mgmt,
1290 /* Suspend/resume and hw reconfiguration */
1291 int ieee80211_reconfig(struct ieee80211_local *local);
1292 void ieee80211_stop_device(struct ieee80211_local *local);
1295 int __ieee80211_suspend(struct ieee80211_hw *hw,
1296 struct cfg80211_wowlan *wowlan);
1298 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
1300 struct ieee80211_local *local = hw_to_local(hw);
1302 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
1303 "%s: resume with hardware scan still in progress\n",
1304 wiphy_name(hw->wiphy));
1306 return ieee80211_reconfig(hw_to_local(hw));
1309 static inline int __ieee80211_suspend(struct ieee80211_hw *hw,
1310 struct cfg80211_wowlan *wowlan)
1315 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
1321 /* utility functions/constants */
1322 extern void *mac80211_wiphy_privid; /* for wiphy privid */
1323 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
1324 enum nl80211_iftype type);
1325 int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
1326 int rate, int erp, int short_preamble);
1327 void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx,
1328 struct ieee80211_hdr *hdr, const u8 *tsc,
1330 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata);
1331 void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
1332 void ieee802_11_parse_elems(u8 *start, size_t len,
1333 struct ieee802_11_elems *elems);
1334 u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
1335 struct ieee802_11_elems *elems,
1336 u64 filter, u32 crc);
1337 u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
1338 enum ieee80211_band band);
1340 void ieee80211_dynamic_ps_enable_work(struct work_struct *work);
1341 void ieee80211_dynamic_ps_disable_work(struct work_struct *work);
1342 void ieee80211_dynamic_ps_timer(unsigned long data);
1343 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1344 struct ieee80211_sub_if_data *sdata,
1346 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1347 struct ieee80211_hdr *hdr);
1348 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1349 struct ieee80211_hdr *hdr, bool ack);
1350 void ieee80211_beacon_connection_loss_work(struct work_struct *work);
1352 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
1353 enum queue_stop_reason reason);
1354 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
1355 enum queue_stop_reason reason);
1356 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
1357 enum queue_stop_reason reason);
1358 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
1359 enum queue_stop_reason reason);
1360 void ieee80211_add_pending_skb(struct ieee80211_local *local,
1361 struct sk_buff *skb);
1362 int ieee80211_add_pending_skbs(struct ieee80211_local *local,
1363 struct sk_buff_head *skbs);
1364 int ieee80211_add_pending_skbs_fn(struct ieee80211_local *local,
1365 struct sk_buff_head *skbs,
1366 void (*fn)(void *data), void *data);
1368 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1369 u16 transaction, u16 auth_alg,
1370 u8 *extra, size_t extra_len, const u8 *bssid,
1371 const u8 *key, u8 key_len, u8 key_idx);
1372 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1373 const u8 *ie, size_t ie_len,
1374 enum ieee80211_band band, u32 rate_mask,
1376 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1378 const u8 *ssid, size_t ssid_len,
1379 const u8 *ie, size_t ie_len,
1381 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1382 const u8 *ssid, size_t ssid_len,
1383 const u8 *ie, size_t ie_len,
1386 void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
1387 const size_t supp_rates_len,
1388 const u8 *supp_rates);
1389 u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
1390 struct ieee802_11_elems *elems,
1391 enum ieee80211_band band);
1392 int __ieee80211_request_smps(struct ieee80211_sub_if_data *sdata,
1393 enum ieee80211_smps_mode smps_mode);
1394 void ieee80211_recalc_smps(struct ieee80211_local *local);
1396 size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
1397 const u8 *ids, int n_ids, size_t offset);
1398 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset);
1400 /* internal work items */
1401 void ieee80211_work_init(struct ieee80211_local *local);
1402 void ieee80211_add_work(struct ieee80211_work *wk);
1403 void free_work(struct ieee80211_work *wk);
1404 void ieee80211_work_purge(struct ieee80211_sub_if_data *sdata);
1405 ieee80211_rx_result ieee80211_work_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1406 struct sk_buff *skb);
1407 int ieee80211_wk_remain_on_channel(struct ieee80211_sub_if_data *sdata,
1408 struct ieee80211_channel *chan,
1409 enum nl80211_channel_type channel_type,
1410 unsigned int duration, u64 *cookie);
1411 int ieee80211_wk_cancel_remain_on_channel(
1412 struct ieee80211_sub_if_data *sdata, u64 cookie);
1414 /* channel management */
1415 enum ieee80211_chan_mode {
1416 CHAN_MODE_UNDEFINED,
1421 enum ieee80211_chan_mode
1422 ieee80211_get_channel_mode(struct ieee80211_local *local,
1423 struct ieee80211_sub_if_data *ignore);
1424 bool ieee80211_set_channel_type(struct ieee80211_local *local,
1425 struct ieee80211_sub_if_data *sdata,
1426 enum nl80211_channel_type chantype);
1428 #ifdef CONFIG_MAC80211_NOINLINE
1429 #define debug_noinline noinline
1431 #define debug_noinline
1434 #endif /* IEEE80211_I_H */