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_UNICAST BIT(1)
140 #define IEEE80211_TX_PS_BUFFERED BIT(2)
142 struct ieee80211_tx_data {
144 struct ieee80211_local *local;
145 struct ieee80211_sub_if_data *sdata;
146 struct sta_info *sta;
147 struct ieee80211_key *key;
149 struct ieee80211_channel *channel;
155 typedef unsigned __bitwise__ ieee80211_rx_result;
156 #define RX_CONTINUE ((__force ieee80211_rx_result) 0u)
157 #define RX_DROP_UNUSABLE ((__force ieee80211_rx_result) 1u)
158 #define RX_DROP_MONITOR ((__force ieee80211_rx_result) 2u)
159 #define RX_QUEUED ((__force ieee80211_rx_result) 3u)
162 * enum ieee80211_packet_rx_flags - packet RX flags
163 * @IEEE80211_RX_RA_MATCH: frame is destined to interface currently processed
164 * (incl. multicast frames)
165 * @IEEE80211_RX_IN_SCAN: received while scanning
166 * @IEEE80211_RX_FRAGMENTED: fragmented frame
167 * @IEEE80211_RX_AMSDU: a-MSDU packet
168 * @IEEE80211_RX_MALFORMED_ACTION_FRM: action frame is malformed
169 * @IEEE80211_RX_DEFERRED_RELEASE: frame was subjected to receive reordering
171 * These are per-frame flags that are attached to a frame in the
172 * @rx_flags field of &struct ieee80211_rx_status.
174 enum ieee80211_packet_rx_flags {
175 IEEE80211_RX_IN_SCAN = BIT(0),
176 IEEE80211_RX_RA_MATCH = BIT(1),
177 IEEE80211_RX_FRAGMENTED = BIT(2),
178 IEEE80211_RX_AMSDU = BIT(3),
179 IEEE80211_RX_MALFORMED_ACTION_FRM = BIT(4),
180 IEEE80211_RX_DEFERRED_RELEASE = BIT(5),
184 * enum ieee80211_rx_flags - RX data flags
186 * @IEEE80211_RX_CMNTR: received on cooked monitor already
188 * These flags are used across handling multiple interfaces
189 * for a single frame.
191 enum ieee80211_rx_flags {
192 IEEE80211_RX_CMNTR = BIT(0),
195 struct ieee80211_rx_data {
197 struct ieee80211_local *local;
198 struct ieee80211_sub_if_data *sdata;
199 struct sta_info *sta;
200 struct ieee80211_key *key;
205 * Index into sequence numbers array, 0..16
206 * since the last (16) is used for non-QoS,
207 * will be 16 on non-QoS frames.
212 * Index into the security IV/PN arrays, 0..16
213 * since the last (16) is used for CCMP-encrypted
214 * management frames, will be set to 16 on mgmt
215 * frames and 0 on non-QoS frames.
225 int head_len, tail_len;
229 struct ieee80211_if_ap {
230 struct beacon_data __rcu *beacon;
232 struct list_head vlans;
234 /* yes, this looks ugly, but guarantees that we can later use
236 * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
237 u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
238 struct sk_buff_head ps_bc_buf;
239 atomic_t num_sta_ps; /* number of stations in PS mode */
244 struct ieee80211_if_wds {
245 struct sta_info *sta;
246 u8 remote_addr[ETH_ALEN];
249 struct ieee80211_if_vlan {
250 struct list_head list;
252 /* used for all tx if the VLAN is configured to 4-addr mode */
253 struct sta_info __rcu *sta;
257 __u32 fwded_mcast; /* Mesh forwarded multicast frames */
258 __u32 fwded_unicast; /* Mesh forwarded unicast frames */
259 __u32 fwded_frames; /* Mesh total forwarded frames */
260 __u32 dropped_frames_ttl; /* Not transmitted since mesh_ttl == 0*/
261 __u32 dropped_frames_no_route; /* Not transmitted, no route found */
262 __u32 dropped_frames_congestion;/* Not forwarded due to congestion */
263 atomic_t estab_plinks;
266 #define PREQ_Q_F_START 0x1
267 #define PREQ_Q_F_REFRESH 0x2
268 struct mesh_preq_queue {
269 struct list_head list;
274 enum ieee80211_work_type {
275 IEEE80211_WORK_ABORT,
276 IEEE80211_WORK_DIRECT_PROBE,
278 IEEE80211_WORK_ASSOC_BEACON_WAIT,
279 IEEE80211_WORK_ASSOC,
280 IEEE80211_WORK_REMAIN_ON_CHANNEL,
281 IEEE80211_WORK_OFFCHANNEL_TX,
285 * enum work_done_result - indicates what to do after work was done
287 * @WORK_DONE_DESTROY: This work item is no longer needed, destroy.
288 * @WORK_DONE_REQUEUE: This work item was reset to be reused, and
289 * should be requeued.
291 enum work_done_result {
296 struct ieee80211_work {
297 struct list_head list;
299 struct rcu_head rcu_head;
301 struct ieee80211_sub_if_data *sdata;
303 enum work_done_result (*done)(struct ieee80211_work *wk,
304 struct sk_buff *skb);
306 struct ieee80211_channel *chan;
307 enum nl80211_channel_type chan_type;
309 unsigned long timeout;
310 enum ieee80211_work_type type;
312 u8 filter_ta[ETH_ALEN];
319 u16 algorithm, transaction;
320 u8 ssid[IEEE80211_MAX_SSID_LEN];
322 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;
345 struct sk_buff *frame;
356 /* flags used in struct ieee80211_if_managed.flags */
357 enum ieee80211_sta_flags {
358 IEEE80211_STA_BEACON_POLL = BIT(0),
359 IEEE80211_STA_CONNECTION_POLL = BIT(1),
360 IEEE80211_STA_CONTROL_PORT = BIT(2),
361 IEEE80211_STA_DISABLE_11N = BIT(4),
362 IEEE80211_STA_CSA_RECEIVED = BIT(5),
363 IEEE80211_STA_MFP_ENABLED = BIT(6),
364 IEEE80211_STA_UAPSD_ENABLED = BIT(7),
365 IEEE80211_STA_NULLFUNC_ACKED = BIT(8),
366 IEEE80211_STA_RESET_SIGNAL_AVE = BIT(9),
369 struct ieee80211_if_managed {
370 struct timer_list timer;
371 struct timer_list conn_mon_timer;
372 struct timer_list bcn_mon_timer;
373 struct timer_list chswitch_timer;
374 struct work_struct monitor_work;
375 struct work_struct chswitch_work;
376 struct work_struct beacon_connection_loss_work;
378 unsigned long beacon_timeout;
379 unsigned long probe_timeout;
380 int probe_send_count;
381 bool nullfunc_failed;
384 struct cfg80211_bss *associated;
390 unsigned long timers_running; /* used for quiesce/restart */
391 bool powersave; /* powersave requested for this iface */
392 bool broken_ap; /* AP is broken -- turn off powersave */
393 enum ieee80211_smps_mode req_smps, /* requested smps mode */
394 ap_smps, /* smps mode AP thinks we're in */
395 driver_smps_mode; /* smps mode request */
397 struct work_struct request_smps_work;
401 bool beacon_crc_valid;
405 IEEE80211_MFP_DISABLED,
406 IEEE80211_MFP_OPTIONAL,
407 IEEE80211_MFP_REQUIRED
408 } mfp; /* management frame protection */
410 int wmm_last_param_set;
414 /* Signal strength from the last Beacon frame in the current BSS. */
415 int last_beacon_signal;
418 * Weighted average of the signal strength from Beacon frames in the
419 * current BSS. This is in units of 1/16 of the signal unit to maintain
420 * accuracy and to speed up calculations, i.e., the value need to be
421 * divided by 16 to get the actual value.
423 int ave_beacon_signal;
426 * Number of Beacon frames used in ave_beacon_signal. This can be used
427 * to avoid generating less reliable cqm events that would be based
428 * only on couple of received frames.
430 unsigned int count_beacon_signal;
433 * Last Beacon frame signal strength average (ave_beacon_signal / 16)
434 * that triggered a cqm event. 0 indicates that no event has been
435 * generated for the current association.
437 int last_cqm_event_signal;
440 * State variables for keeping track of RSSI of the AP currently
441 * connected to and informing driver when RSSI has gone
442 * below/above a certain threshold.
444 int rssi_min_thold, rssi_max_thold;
445 int last_ave_beacon_signal;
448 struct ieee80211_if_ibss {
449 struct timer_list timer;
453 unsigned long last_scan_completed;
464 u8 ssid[IEEE80211_MAX_SSID_LEN];
467 struct ieee80211_channel *channel;
469 unsigned long ibss_join_req;
470 /* probe response/beacon for IBSS */
471 struct sk_buff __rcu *presp;
475 IEEE80211_IBSS_MLME_SEARCH,
476 IEEE80211_IBSS_MLME_JOINED,
480 struct ieee80211_if_mesh {
481 struct timer_list housekeeping_timer;
482 struct timer_list mesh_path_timer;
483 struct timer_list mesh_path_root_timer;
485 unsigned long timers_running;
487 unsigned long wrkq_flags;
489 u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
491 /* Active Path Selection Protocol Identifier */
493 /* Active Path Selection Metric Identifier */
495 /* Congestion Control Mode Identifier */
497 /* Synchronization Protocol Identifier */
499 /* Authentication Protocol Identifier */
501 /* Local mesh Sequence Number */
503 /* Last used PREQ ID */
506 /* Timestamp of last SN update */
507 unsigned long last_sn_update;
508 /* Timestamp of last SN sent */
509 unsigned long last_preq;
510 struct mesh_rmc *rmc;
511 spinlock_t mesh_preq_queue_lock;
512 struct mesh_preq_queue preq_queue;
514 struct mesh_stats mshstats;
515 struct mesh_config mshcfg;
517 bool accepting_plinks;
522 IEEE80211_MESH_SEC_NONE = 0x0,
523 IEEE80211_MESH_SEC_AUTHED = 0x1,
524 IEEE80211_MESH_SEC_SECURED = 0x2,
528 #ifdef CONFIG_MAC80211_MESH
529 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
530 do { (msh)->mshstats.name++; } while (0)
532 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
537 * enum ieee80211_sub_if_data_flags - virtual interface flags
539 * @IEEE80211_SDATA_ALLMULTI: interface wants all multicast packets
540 * @IEEE80211_SDATA_PROMISC: interface is promisc
541 * @IEEE80211_SDATA_OPERATING_GMODE: operating in G-only mode
542 * @IEEE80211_SDATA_DONT_BRIDGE_PACKETS: bridge packets between
543 * associated stations and deliver multicast frames both
544 * back to wireless media and to the local net stack.
545 * @IEEE80211_SDATA_DISCONNECT_RESUME: Disconnect after resume.
547 enum ieee80211_sub_if_data_flags {
548 IEEE80211_SDATA_ALLMULTI = BIT(0),
549 IEEE80211_SDATA_PROMISC = BIT(1),
550 IEEE80211_SDATA_OPERATING_GMODE = BIT(2),
551 IEEE80211_SDATA_DONT_BRIDGE_PACKETS = BIT(3),
552 IEEE80211_SDATA_DISCONNECT_RESUME = BIT(4),
556 * enum ieee80211_sdata_state_bits - virtual interface state bits
557 * @SDATA_STATE_RUNNING: virtual interface is up & running; this
558 * mirrors netif_running() but is separate for interface type
559 * change handling while the interface is up
560 * @SDATA_STATE_OFFCHANNEL: This interface is currently in offchannel
561 * mode, so queues are stopped
563 enum ieee80211_sdata_state_bits {
565 SDATA_STATE_OFFCHANNEL,
568 struct ieee80211_sub_if_data {
569 struct list_head list;
571 struct wireless_dev wdev;
574 struct list_head key_list;
576 /* count for keys needing tailroom space allocation */
577 int crypto_tx_tailroom_needed_cnt;
579 struct net_device *dev;
580 struct ieee80211_local *local;
586 int drop_unencrypted;
591 * keep track of whether the HT opmode (stored in
592 * vif.bss_info.ht_operation_mode) is valid.
594 bool ht_opmode_valid;
596 /* to detect idle changes */
599 /* Fragment table for host-based reassembly */
600 struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
601 unsigned int fragment_next;
603 struct ieee80211_key __rcu *keys[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
604 struct ieee80211_key __rcu *default_unicast_key;
605 struct ieee80211_key __rcu *default_multicast_key;
606 struct ieee80211_key __rcu *default_mgmt_key;
609 __be16 control_port_protocol;
610 bool control_port_no_encrypt;
612 struct ieee80211_tx_queue_params tx_conf[IEEE80211_MAX_QUEUES];
614 struct work_struct work;
615 struct sk_buff_head skb_queue;
617 bool arp_filter_state;
620 * AP this belongs to: self in AP mode and
621 * corresponding AP in VLAN mode, NULL for
622 * all others (might be needed later in IBSS)
624 struct ieee80211_if_ap *bss;
626 /* bitmap of allowed (non-MCS) rate indexes for rate control */
627 u32 rc_rateidx_mask[IEEE80211_NUM_BANDS];
630 struct ieee80211_if_ap ap;
631 struct ieee80211_if_wds wds;
632 struct ieee80211_if_vlan vlan;
633 struct ieee80211_if_managed mgd;
634 struct ieee80211_if_ibss ibss;
635 struct ieee80211_if_mesh mesh;
639 #ifdef CONFIG_MAC80211_DEBUGFS
642 struct dentry *subdir_stations;
643 struct dentry *default_unicast_key;
644 struct dentry *default_multicast_key;
645 struct dentry *default_mgmt_key;
648 /* must be last, dynamically sized area in this! */
649 struct ieee80211_vif vif;
653 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
655 return container_of(p, struct ieee80211_sub_if_data, vif);
658 enum sdata_queue_type {
659 IEEE80211_SDATA_QUEUE_TYPE_FRAME = 0,
660 IEEE80211_SDATA_QUEUE_AGG_START = 1,
661 IEEE80211_SDATA_QUEUE_AGG_STOP = 2,
665 IEEE80211_RX_MSG = 1,
666 IEEE80211_TX_STATUS_MSG = 2,
667 IEEE80211_EOSP_MSG = 3,
670 struct skb_eosp_msg_data {
671 u8 sta[ETH_ALEN], iface[ETH_ALEN];
674 enum queue_stop_reason {
675 IEEE80211_QUEUE_STOP_REASON_DRIVER,
676 IEEE80211_QUEUE_STOP_REASON_PS,
677 IEEE80211_QUEUE_STOP_REASON_CSA,
678 IEEE80211_QUEUE_STOP_REASON_AGGREGATION,
679 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
680 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
681 IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE,
684 #ifdef CONFIG_MAC80211_LEDS
685 struct tpt_led_trigger {
686 struct led_trigger trig;
688 const struct ieee80211_tpt_blink *blink_table;
689 unsigned int blink_table_len;
690 struct timer_list timer;
691 unsigned long prev_traffic;
692 unsigned long tx_bytes, rx_bytes;
693 unsigned int active, want;
699 * mac80211 scan flags - currently active scan mode
701 * @SCAN_SW_SCANNING: We're currently in the process of scanning but may as
702 * well be on the operating channel
703 * @SCAN_HW_SCANNING: The hardware is scanning for us, we have no way to
704 * determine if we are on the operating channel or not
705 * @SCAN_COMPLETED: Set for our scan work function when the driver reported
706 * that the scan completed.
707 * @SCAN_ABORTED: Set for our scan work function when the driver reported
708 * a scan complete for an aborted scan.
718 * enum mac80211_scan_state - scan state machine states
720 * @SCAN_DECISION: Main entry point to the scan state machine, this state
721 * determines if we should keep on scanning or switch back to the
723 * @SCAN_SET_CHANNEL: Set the next channel to be scanned
724 * @SCAN_SEND_PROBE: Send probe requests and wait for probe responses
725 * @SCAN_LEAVE_OPER_CHANNEL: Leave the operating channel, notify the AP
726 * about us leaving the channel and stop all associated STA interfaces
727 * @SCAN_ENTER_OPER_CHANNEL: Enter the operating channel again, notify the
728 * AP about us being back and restart all associated STA interfaces
730 enum mac80211_scan_state {
734 SCAN_LEAVE_OPER_CHANNEL,
735 SCAN_ENTER_OPER_CHANNEL,
738 struct ieee80211_local {
739 /* embed the driver visible part.
740 * don't cast (use the static inlines below), but we keep
741 * it first anyway so they become a no-op */
742 struct ieee80211_hw hw;
744 const struct ieee80211_ops *ops;
747 * work stuff, potentially off-channel (in the future)
749 struct list_head work_list;
750 struct timer_list work_timer;
751 struct work_struct work_work;
752 struct sk_buff_head work_skb_queue;
755 * private workqueue to mac80211. mac80211 makes this accessible
756 * via ieee80211_queue_work()
758 struct workqueue_struct *workqueue;
760 unsigned long queue_stop_reasons[IEEE80211_MAX_QUEUES];
761 /* also used to protect ampdu_ac_queue and amdpu_ac_stop_refcnt */
762 spinlock_t queue_stop_reason_lock;
765 int monitors, cooked_mntrs;
766 /* number of interfaces with corresponding FIF_ flags */
767 int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss, fif_pspoll,
770 unsigned int filter_flags; /* FIF_* */
772 bool wiphy_ciphers_allocated;
774 /* protects the aggregated multicast list and filter calls */
775 spinlock_t filter_lock;
777 /* used for uploading changed mc list */
778 struct work_struct reconfig_filter;
780 /* used to reconfigure hardware SM PS */
781 struct work_struct recalc_smps;
783 /* aggregated multicast list */
784 struct netdev_hw_addr_list mc_list;
786 bool tim_in_locked_section; /* see ieee80211_beacon_get() */
789 * suspended is true if we finished all the suspend _and_ we have
790 * not yet come up from resume. This is to be used by mac80211
791 * to ensure driver sanity during suspend and mac80211's own
792 * sanity. It can eventually be used for WoW as well.
797 * Resuming is true while suspended, but when we're reprogramming the
798 * hardware -- at that time it's allowed to use ieee80211_queue_work()
799 * again even though some other parts of the stack are still suspended
800 * and we still drop received frames to avoid waking the stack.
805 * quiescing is true during the suspend process _only_ to
806 * ease timer cancelling etc.
810 /* device is started */
813 /* wowlan is enabled -- don't reconfig on resume */
816 int tx_headroom; /* required headroom for hardware/radiotap */
818 /* Tasklet and skb queue to process calls from IRQ mode. All frames
819 * added to skb_queue will be processed, but frames in
820 * skb_queue_unreliable may be dropped if the total length of these
821 * queues increases over the limit. */
822 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
823 struct tasklet_struct tasklet;
824 struct sk_buff_head skb_queue;
825 struct sk_buff_head skb_queue_unreliable;
828 * Internal FIFO queue which is shared between multiple rx path
829 * stages. Its main task is to provide a serialization mechanism,
830 * so all rx handlers can enjoy having exclusive access to their
831 * private data structures.
833 struct sk_buff_head rx_skb_queue;
834 bool running_rx_handler; /* protected by rx_skb_queue.lock */
838 * The mutex only protects the list and counter,
839 * reads are done in RCU.
840 * Additionally, the lock protects the hash table,
841 * the pending list and each BSS's TIM bitmap.
843 struct mutex sta_mtx;
845 unsigned long num_sta;
846 struct list_head sta_list, sta_pending_list;
847 struct sta_info __rcu *sta_hash[STA_HASH_SIZE];
848 struct timer_list sta_cleanup;
849 struct work_struct sta_finish_work;
852 struct sk_buff_head pending[IEEE80211_MAX_QUEUES];
853 struct tasklet_struct tx_pending_tasklet;
855 atomic_t agg_queue_stop[IEEE80211_MAX_QUEUES];
857 /* number of interfaces with corresponding IFF_ flags */
858 atomic_t iff_allmultis, iff_promiscs;
860 struct rate_control_ref *rate_ctrl;
862 struct crypto_cipher *wep_tx_tfm;
863 struct crypto_cipher *wep_rx_tfm;
867 struct list_head interfaces;
868 struct mutex iflist_mtx;
871 * Key mutex, protects sdata's key_list and sta_info's
872 * key pointers (write access, they're RCU.)
874 struct mutex key_mtx;
876 /* mutex for scan and work locking */
879 /* Scanning and BSS list */
880 unsigned long scanning;
881 struct cfg80211_ssid scan_ssid;
882 struct cfg80211_scan_request *int_scan_req;
883 struct cfg80211_scan_request *scan_req, *hw_scan_req;
884 struct ieee80211_channel *scan_channel;
885 enum ieee80211_band hw_scan_band;
886 int scan_channel_idx;
890 struct ieee80211_sched_scan_ies sched_scan_ies;
891 struct work_struct sched_scan_stopped_work;
893 unsigned long leave_oper_channel_time;
894 enum mac80211_scan_state next_scan_state;
895 struct delayed_work scan_work;
896 struct ieee80211_sub_if_data *scan_sdata;
897 enum nl80211_channel_type _oper_channel_type;
898 struct ieee80211_channel *oper_channel, *csa_channel;
900 /* Temporary remain-on-channel for off-channel operations */
901 struct ieee80211_channel *tmp_channel;
902 enum nl80211_channel_type tmp_channel_type;
905 /* dot11CountersTable */
906 u32 dot11TransmittedFragmentCount;
907 u32 dot11MulticastTransmittedFrameCount;
908 u32 dot11FailedCount;
910 u32 dot11MultipleRetryCount;
911 u32 dot11FrameDuplicateCount;
912 u32 dot11ReceivedFragmentCount;
913 u32 dot11MulticastReceivedFrameCount;
914 u32 dot11TransmittedFrameCount;
916 #ifdef CONFIG_MAC80211_LEDS
917 int tx_led_counter, rx_led_counter;
918 struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led;
919 struct tpt_led_trigger *tpt_led_trigger;
920 char tx_led_name[32], rx_led_name[32],
921 assoc_led_name[32], radio_led_name[32];
924 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
925 /* TX/RX handler statistics */
926 unsigned int tx_handlers_drop;
927 unsigned int tx_handlers_queued;
928 unsigned int tx_handlers_drop_unencrypted;
929 unsigned int tx_handlers_drop_fragment;
930 unsigned int tx_handlers_drop_wep;
931 unsigned int tx_handlers_drop_not_assoc;
932 unsigned int tx_handlers_drop_unauth_port;
933 unsigned int rx_handlers_drop;
934 unsigned int rx_handlers_queued;
935 unsigned int rx_handlers_drop_nullfunc;
936 unsigned int rx_handlers_drop_defrag;
937 unsigned int rx_handlers_drop_short;
938 unsigned int rx_handlers_drop_passive_scan;
939 unsigned int tx_expand_skb_head;
940 unsigned int tx_expand_skb_head_cloned;
941 unsigned int rx_expand_skb_head;
942 unsigned int rx_expand_skb_head2;
943 unsigned int rx_handlers_fragments;
944 unsigned int tx_status_drop;
945 #define I802_DEBUG_INC(c) (c)++
946 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
947 #define I802_DEBUG_INC(c) do { } while (0)
948 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
951 int total_ps_buffered; /* total number of all buffered unicast and
952 * multicast packets for power saving stations
954 int wifi_wme_noack_test;
955 unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */
958 * Bitmask of enabled u-apsd queues,
959 * IEEE80211_WMM_IE_STA_QOSINFO_AC_BE & co. Needs a new association
962 unsigned int uapsd_queues;
965 * Maximum number of buffered frames AP can deliver during a
966 * service period, IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL or similar.
967 * Needs a new association to take effect.
969 unsigned int uapsd_max_sp_len;
972 bool offchannel_ps_enabled;
974 * PS can only be enabled when we have exactly one managed
975 * interface (and monitors) in PS, this then points there.
977 struct ieee80211_sub_if_data *ps_sdata;
978 struct work_struct dynamic_ps_enable_work;
979 struct work_struct dynamic_ps_disable_work;
980 struct timer_list dynamic_ps_timer;
981 struct notifier_block network_latency_notifier;
982 struct notifier_block ifa_notifier;
985 * The dynamic ps timeout configured from user space via WEXT -
986 * this will override whatever chosen by mac80211 internally.
988 int dynamic_ps_forced_timeout;
989 int dynamic_ps_user_timeout;
990 bool disable_dynamic_ps;
992 int user_power_level; /* in dBm */
993 int power_constr_level; /* in dBm */
995 enum ieee80211_smps_mode smps_mode;
997 struct work_struct restart_work;
999 #ifdef CONFIG_MAC80211_DEBUGFS
1000 struct local_debugfsdentries {
1001 struct dentry *rcdir;
1002 struct dentry *keys;
1006 struct ieee80211_channel *hw_roc_channel;
1007 struct net_device *hw_roc_dev;
1008 struct sk_buff *hw_roc_skb, *hw_roc_skb_for_status;
1009 struct work_struct hw_roc_start, hw_roc_done;
1010 enum nl80211_channel_type hw_roc_channel_type;
1011 unsigned int hw_roc_duration;
1015 /* dummy netdev for use w/ NAPI */
1016 struct net_device napi_dev;
1018 struct napi_struct napi;
1021 static inline struct ieee80211_sub_if_data *
1022 IEEE80211_DEV_TO_SUB_IF(struct net_device *dev)
1024 return netdev_priv(dev);
1027 /* this struct represents 802.11n's RA/TID combination */
1028 struct ieee80211_ra_tid {
1033 static inline struct ieee80211_local *hw_to_local(
1034 struct ieee80211_hw *hw)
1036 return container_of(hw, struct ieee80211_local, hw);
1039 static inline struct ieee80211_hw *local_to_hw(
1040 struct ieee80211_local *local)
1046 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
1048 return compare_ether_addr(raddr, addr) == 0 ||
1049 is_broadcast_ether_addr(raddr);
1053 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed);
1054 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
1055 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
1057 void ieee80211_configure_filter(struct ieee80211_local *local);
1058 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
1061 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata);
1062 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
1063 struct cfg80211_auth_request *req);
1064 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
1065 struct cfg80211_assoc_request *req);
1066 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
1067 struct cfg80211_deauth_request *req,
1069 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
1070 struct cfg80211_disassoc_request *req,
1072 void ieee80211_send_pspoll(struct ieee80211_local *local,
1073 struct ieee80211_sub_if_data *sdata);
1074 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency);
1075 int ieee80211_max_network_latency(struct notifier_block *nb,
1076 unsigned long data, void *dummy);
1077 int ieee80211_set_arp_filter(struct ieee80211_sub_if_data *sdata);
1078 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1079 struct ieee80211_channel_sw_ie *sw_elem,
1080 struct ieee80211_bss *bss,
1082 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata);
1083 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata);
1084 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata);
1085 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1086 struct sk_buff *skb);
1087 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata);
1088 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata);
1091 void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local);
1092 void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata);
1093 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
1094 u8 *bssid, u8 *addr, u32 supp_rates,
1096 int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
1097 struct cfg80211_ibss_params *params);
1098 int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata);
1099 void ieee80211_ibss_quiesce(struct ieee80211_sub_if_data *sdata);
1100 void ieee80211_ibss_restart(struct ieee80211_sub_if_data *sdata);
1101 void ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata);
1102 void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1103 struct sk_buff *skb);
1106 void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata);
1107 void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1108 struct sk_buff *skb);
1110 /* scan/BSS handling */
1111 void ieee80211_scan_work(struct work_struct *work);
1112 int ieee80211_request_internal_scan(struct ieee80211_sub_if_data *sdata,
1113 const u8 *ssid, u8 ssid_len,
1114 struct ieee80211_channel *chan);
1115 int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
1116 struct cfg80211_scan_request *req);
1117 void ieee80211_scan_cancel(struct ieee80211_local *local);
1119 ieee80211_scan_rx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
1121 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local);
1122 struct ieee80211_bss *
1123 ieee80211_bss_info_update(struct ieee80211_local *local,
1124 struct ieee80211_rx_status *rx_status,
1125 struct ieee80211_mgmt *mgmt,
1127 struct ieee802_11_elems *elems,
1128 struct ieee80211_channel *channel,
1130 struct ieee80211_bss *
1131 ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq,
1132 u8 *ssid, u8 ssid_len);
1133 void ieee80211_rx_bss_put(struct ieee80211_local *local,
1134 struct ieee80211_bss *bss);
1136 /* scheduled scan handling */
1137 int ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata,
1138 struct cfg80211_sched_scan_request *req);
1139 int ieee80211_request_sched_scan_stop(struct ieee80211_sub_if_data *sdata);
1140 void ieee80211_sched_scan_stopped_work(struct work_struct *work);
1142 /* off-channel helpers */
1143 bool ieee80211_cfg_on_oper_channel(struct ieee80211_local *local);
1144 void ieee80211_offchannel_enable_all_ps(struct ieee80211_local *local,
1146 void ieee80211_offchannel_stop_vifs(struct ieee80211_local *local,
1147 bool offchannel_ps_enable);
1148 void ieee80211_offchannel_return(struct ieee80211_local *local,
1149 bool enable_beaconing,
1150 bool offchannel_ps_disable);
1151 void ieee80211_hw_roc_setup(struct ieee80211_local *local);
1153 /* interface handling */
1154 int ieee80211_iface_init(void);
1155 void ieee80211_iface_exit(void);
1156 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1157 struct net_device **new_dev, enum nl80211_iftype type,
1158 struct vif_params *params);
1159 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1160 enum nl80211_iftype type);
1161 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata);
1162 void ieee80211_remove_interfaces(struct ieee80211_local *local);
1163 u32 __ieee80211_recalc_idle(struct ieee80211_local *local);
1164 void ieee80211_recalc_idle(struct ieee80211_local *local);
1165 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
1168 static inline bool ieee80211_sdata_running(struct ieee80211_sub_if_data *sdata)
1170 return test_bit(SDATA_STATE_RUNNING, &sdata->state);
1174 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
1175 void ieee80211_tx_pending(unsigned long data);
1176 netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
1177 struct net_device *dev);
1178 netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
1179 struct net_device *dev);
1182 void ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_supported_band *sband,
1183 struct ieee80211_ht_cap *ht_cap_ie,
1184 struct ieee80211_sta_ht_cap *ht_cap);
1185 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
1186 const u8 *da, u16 tid,
1187 u16 initiator, u16 reason_code);
1188 int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata,
1189 enum ieee80211_smps_mode smps, const u8 *da,
1191 void ieee80211_request_smps_work(struct work_struct *work);
1193 void ___ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1194 u16 initiator, u16 reason, bool stop);
1195 void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1196 u16 initiator, u16 reason, bool stop);
1197 void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta, bool tx);
1198 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
1199 struct sta_info *sta,
1200 struct ieee80211_mgmt *mgmt, size_t len);
1201 void ieee80211_process_addba_resp(struct ieee80211_local *local,
1202 struct sta_info *sta,
1203 struct ieee80211_mgmt *mgmt,
1205 void ieee80211_process_addba_request(struct ieee80211_local *local,
1206 struct sta_info *sta,
1207 struct ieee80211_mgmt *mgmt,
1210 int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1211 enum ieee80211_back_parties initiator,
1213 int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1214 enum ieee80211_back_parties initiator,
1216 void ieee80211_start_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u16 tid);
1217 void ieee80211_stop_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u8 tid);
1218 void ieee80211_ba_session_work(struct work_struct *work);
1219 void ieee80211_tx_ba_session_handle_start(struct sta_info *sta, int tid);
1220 void ieee80211_release_reorder_timeout(struct sta_info *sta, int tid);
1222 /* Spectrum management */
1223 void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata,
1224 struct ieee80211_mgmt *mgmt,
1227 /* Suspend/resume and hw reconfiguration */
1228 int ieee80211_reconfig(struct ieee80211_local *local);
1229 void ieee80211_stop_device(struct ieee80211_local *local);
1232 int __ieee80211_suspend(struct ieee80211_hw *hw,
1233 struct cfg80211_wowlan *wowlan);
1235 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
1237 struct ieee80211_local *local = hw_to_local(hw);
1239 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
1240 "%s: resume with hardware scan still in progress\n",
1241 wiphy_name(hw->wiphy));
1243 return ieee80211_reconfig(hw_to_local(hw));
1246 static inline int __ieee80211_suspend(struct ieee80211_hw *hw,
1247 struct cfg80211_wowlan *wowlan)
1252 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
1258 /* utility functions/constants */
1259 extern void *mac80211_wiphy_privid; /* for wiphy privid */
1260 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
1261 enum nl80211_iftype type);
1262 int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
1263 int rate, int erp, int short_preamble);
1264 void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx,
1265 struct ieee80211_hdr *hdr, const u8 *tsc,
1267 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata);
1268 void ieee80211_xmit(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
1269 void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
1270 void ieee802_11_parse_elems(u8 *start, size_t len,
1271 struct ieee802_11_elems *elems);
1272 u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
1273 struct ieee802_11_elems *elems,
1274 u64 filter, u32 crc);
1275 u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
1276 enum ieee80211_band band);
1278 void ieee80211_dynamic_ps_enable_work(struct work_struct *work);
1279 void ieee80211_dynamic_ps_disable_work(struct work_struct *work);
1280 void ieee80211_dynamic_ps_timer(unsigned long data);
1281 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1282 struct ieee80211_sub_if_data *sdata,
1284 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1285 struct ieee80211_hdr *hdr);
1286 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1287 struct ieee80211_hdr *hdr, bool ack);
1288 void ieee80211_beacon_connection_loss_work(struct work_struct *work);
1290 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
1291 enum queue_stop_reason reason);
1292 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
1293 enum queue_stop_reason reason);
1294 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
1295 enum queue_stop_reason reason);
1296 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
1297 enum queue_stop_reason reason);
1298 void ieee80211_add_pending_skb(struct ieee80211_local *local,
1299 struct sk_buff *skb);
1300 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
1301 struct sk_buff_head *skbs);
1302 void ieee80211_add_pending_skbs_fn(struct ieee80211_local *local,
1303 struct sk_buff_head *skbs,
1304 void (*fn)(void *data), void *data);
1306 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1307 u16 transaction, u16 auth_alg,
1308 u8 *extra, size_t extra_len, const u8 *bssid,
1309 const u8 *key, u8 key_len, u8 key_idx);
1310 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1311 const u8 *ie, size_t ie_len,
1312 enum ieee80211_band band, u32 rate_mask,
1314 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1315 u8 *dst, u32 ratemask,
1316 const u8 *ssid, size_t ssid_len,
1317 const u8 *ie, size_t ie_len,
1319 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1320 const u8 *ssid, size_t ssid_len,
1321 const u8 *ie, size_t ie_len,
1322 u32 ratemask, bool directed, bool no_cck);
1324 void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
1325 const size_t supp_rates_len,
1326 const u8 *supp_rates);
1327 u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
1328 struct ieee802_11_elems *elems,
1329 enum ieee80211_band band);
1330 int __ieee80211_request_smps(struct ieee80211_sub_if_data *sdata,
1331 enum ieee80211_smps_mode smps_mode);
1332 void ieee80211_recalc_smps(struct ieee80211_local *local);
1334 size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
1335 const u8 *ids, int n_ids, size_t offset);
1336 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset);
1337 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_supported_band *sband,
1339 u8 *ieee80211_ie_build_ht_info(u8 *pos,
1340 struct ieee80211_sta_ht_cap *ht_cap,
1341 struct ieee80211_channel *channel,
1342 enum nl80211_channel_type channel_type);
1344 /* internal work items */
1345 void ieee80211_work_init(struct ieee80211_local *local);
1346 void ieee80211_add_work(struct ieee80211_work *wk);
1347 void free_work(struct ieee80211_work *wk);
1348 void ieee80211_work_purge(struct ieee80211_sub_if_data *sdata);
1349 ieee80211_rx_result ieee80211_work_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1350 struct sk_buff *skb);
1351 int ieee80211_wk_remain_on_channel(struct ieee80211_sub_if_data *sdata,
1352 struct ieee80211_channel *chan,
1353 enum nl80211_channel_type channel_type,
1354 unsigned int duration, u64 *cookie);
1355 int ieee80211_wk_cancel_remain_on_channel(
1356 struct ieee80211_sub_if_data *sdata, u64 cookie);
1358 /* channel management */
1359 enum ieee80211_chan_mode {
1360 CHAN_MODE_UNDEFINED,
1365 enum ieee80211_chan_mode
1366 ieee80211_get_channel_mode(struct ieee80211_local *local,
1367 struct ieee80211_sub_if_data *ignore);
1368 bool ieee80211_set_channel_type(struct ieee80211_local *local,
1369 struct ieee80211_sub_if_data *sdata,
1370 enum nl80211_channel_type chantype);
1371 enum nl80211_channel_type
1372 ieee80211_ht_info_to_channel_type(struct ieee80211_ht_info *ht_info);
1374 #ifdef CONFIG_MAC80211_NOINLINE
1375 #define debug_noinline noinline
1377 #define debug_noinline
1380 #endif /* IEEE80211_I_H */