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))
57 * Some APs experience problems when working with U-APSD. Decreasing the
58 * probability of that happening by using legacy mode for all ACs but VO isn't
61 * Cisco 4410N originally forced us to enable VO by default only because it
62 * treated non-VO ACs as legacy.
64 * However some APs (notably Netgear R7000) silently reclassify packets to
65 * different ACs. Since u-APSD ACs require trigger frames for frame retrieval
66 * clients would never see some frames (e.g. ARP responses) or would fetch them
67 * accidentally after a long time.
69 * It makes little sense to enable u-APSD queues by default because it needs
70 * userspace applications to be aware of it to actually take advantage of the
71 * possible additional powersavings. Implicitly depending on driver autotrigger
72 * frame support doesn't make much sense.
74 #define IEEE80211_DEFAULT_UAPSD_QUEUES 0
76 #define IEEE80211_DEFAULT_MAX_SP_LEN \
77 IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL
79 struct ieee80211_fragment_entry {
80 unsigned long first_frag_time;
82 unsigned int rx_queue;
83 unsigned int last_frag;
84 unsigned int extra_len;
85 struct sk_buff_head skb_list;
86 int ccmp; /* Whether fragments were encrypted with CCMP */
87 u8 last_pn[6]; /* PN of the last fragment if CCMP was used */
91 struct ieee80211_bss {
92 /* don't want to look up all the time */
94 u8 ssid[IEEE80211_MAX_SSID_LEN];
101 unsigned long last_probe_resp;
103 #ifdef CONFIG_MAC80211_MESH
109 #define IEEE80211_MAX_SUPP_RATES 32
110 u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
111 size_t supp_rates_len;
114 * During association, we save an ERP value from a probe response so
115 * that we can feed ERP info to the driver when handling the
116 * association completes. these fields probably won't be up-to-date
117 * otherwise, you probably don't want to use them.
123 static inline u8 *bss_mesh_cfg(struct ieee80211_bss *bss)
125 #ifdef CONFIG_MAC80211_MESH
126 return bss->mesh_cfg;
131 static inline u8 *bss_mesh_id(struct ieee80211_bss *bss)
133 #ifdef CONFIG_MAC80211_MESH
139 static inline u8 bss_mesh_id_len(struct ieee80211_bss *bss)
141 #ifdef CONFIG_MAC80211_MESH
142 return bss->mesh_id_len;
148 typedef unsigned __bitwise__ ieee80211_tx_result;
149 #define TX_CONTINUE ((__force ieee80211_tx_result) 0u)
150 #define TX_DROP ((__force ieee80211_tx_result) 1u)
151 #define TX_QUEUED ((__force ieee80211_tx_result) 2u)
153 #define IEEE80211_TX_UNICAST BIT(1)
154 #define IEEE80211_TX_PS_BUFFERED BIT(2)
156 struct ieee80211_tx_data {
158 struct ieee80211_local *local;
159 struct ieee80211_sub_if_data *sdata;
160 struct sta_info *sta;
161 struct ieee80211_key *key;
163 struct ieee80211_channel *channel;
169 typedef unsigned __bitwise__ ieee80211_rx_result;
170 #define RX_CONTINUE ((__force ieee80211_rx_result) 0u)
171 #define RX_DROP_UNUSABLE ((__force ieee80211_rx_result) 1u)
172 #define RX_DROP_MONITOR ((__force ieee80211_rx_result) 2u)
173 #define RX_QUEUED ((__force ieee80211_rx_result) 3u)
176 * enum ieee80211_packet_rx_flags - packet RX flags
177 * @IEEE80211_RX_RA_MATCH: frame is destined to interface currently processed
178 * (incl. multicast frames)
179 * @IEEE80211_RX_IN_SCAN: received while scanning
180 * @IEEE80211_RX_FRAGMENTED: fragmented frame
181 * @IEEE80211_RX_AMSDU: a-MSDU packet
182 * @IEEE80211_RX_MALFORMED_ACTION_FRM: action frame is malformed
183 * @IEEE80211_RX_DEFERRED_RELEASE: frame was subjected to receive reordering
185 * These are per-frame flags that are attached to a frame in the
186 * @rx_flags field of &struct ieee80211_rx_status.
188 enum ieee80211_packet_rx_flags {
189 IEEE80211_RX_IN_SCAN = BIT(0),
190 IEEE80211_RX_RA_MATCH = BIT(1),
191 IEEE80211_RX_FRAGMENTED = BIT(2),
192 IEEE80211_RX_AMSDU = BIT(3),
193 IEEE80211_RX_MALFORMED_ACTION_FRM = BIT(4),
194 IEEE80211_RX_DEFERRED_RELEASE = BIT(5),
198 * enum ieee80211_rx_flags - RX data flags
200 * @IEEE80211_RX_CMNTR: received on cooked monitor already
202 * These flags are used across handling multiple interfaces
203 * for a single frame.
205 enum ieee80211_rx_flags {
206 IEEE80211_RX_CMNTR = BIT(0),
209 struct ieee80211_rx_data {
211 struct ieee80211_local *local;
212 struct ieee80211_sub_if_data *sdata;
213 struct sta_info *sta;
214 struct ieee80211_key *key;
219 * Index into sequence numbers array, 0..16
220 * since the last (16) is used for non-QoS,
221 * will be 16 on non-QoS frames.
226 * Index into the security IV/PN arrays, 0..16
227 * since the last (16) is used for CCMP-encrypted
228 * management frames, will be set to 16 on mgmt
229 * frames and 0 on non-QoS frames.
239 int head_len, tail_len;
243 struct ieee80211_if_ap {
244 struct beacon_data __rcu *beacon;
246 struct list_head vlans;
248 /* yes, this looks ugly, but guarantees that we can later use
250 * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
251 u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
252 struct sk_buff_head ps_bc_buf;
253 atomic_t num_sta_ps; /* number of stations in PS mode */
258 struct ieee80211_if_wds {
259 struct sta_info *sta;
260 u8 remote_addr[ETH_ALEN];
263 struct ieee80211_if_vlan {
264 struct list_head list;
266 /* used for all tx if the VLAN is configured to 4-addr mode */
267 struct sta_info __rcu *sta;
271 __u32 fwded_mcast; /* Mesh forwarded multicast frames */
272 __u32 fwded_unicast; /* Mesh forwarded unicast frames */
273 __u32 fwded_frames; /* Mesh total forwarded frames */
274 __u32 dropped_frames_ttl; /* Not transmitted since mesh_ttl == 0*/
275 __u32 dropped_frames_no_route; /* Not transmitted, no route found */
276 __u32 dropped_frames_congestion;/* Not forwarded due to congestion */
277 atomic_t estab_plinks;
280 #define PREQ_Q_F_START 0x1
281 #define PREQ_Q_F_REFRESH 0x2
282 struct mesh_preq_queue {
283 struct list_head list;
288 enum ieee80211_work_type {
289 IEEE80211_WORK_ABORT,
290 IEEE80211_WORK_DIRECT_PROBE,
292 IEEE80211_WORK_ASSOC_BEACON_WAIT,
293 IEEE80211_WORK_ASSOC,
294 IEEE80211_WORK_REMAIN_ON_CHANNEL,
295 IEEE80211_WORK_OFFCHANNEL_TX,
299 * enum work_done_result - indicates what to do after work was done
301 * @WORK_DONE_DESTROY: This work item is no longer needed, destroy.
302 * @WORK_DONE_REQUEUE: This work item was reset to be reused, and
303 * should be requeued.
305 enum work_done_result {
310 struct ieee80211_work {
311 struct list_head list;
313 struct rcu_head rcu_head;
315 struct ieee80211_sub_if_data *sdata;
317 enum work_done_result (*done)(struct ieee80211_work *wk,
318 struct sk_buff *skb);
320 struct ieee80211_channel *chan;
321 enum nl80211_channel_type chan_type;
323 unsigned long timeout;
324 enum ieee80211_work_type type;
326 u8 filter_ta[ETH_ALEN];
333 u16 algorithm, transaction;
334 u8 ssid[IEEE80211_MAX_SSID_LEN];
336 u8 key[WLAN_KEY_LEN_WEP104];
342 struct cfg80211_bss *bss;
343 const u8 *supp_rates;
344 const u8 *ht_information_ie;
345 enum ieee80211_smps_mode smps;
348 u8 prev_bssid[ETH_ALEN];
349 u8 ssid[IEEE80211_MAX_SSID_LEN];
352 bool wmm_used, use_11n, uapsd_used;
359 struct sk_buff *frame;
370 /* flags used in struct ieee80211_if_managed.flags */
371 enum ieee80211_sta_flags {
372 IEEE80211_STA_BEACON_POLL = BIT(0),
373 IEEE80211_STA_CONNECTION_POLL = BIT(1),
374 IEEE80211_STA_CONTROL_PORT = BIT(2),
375 IEEE80211_STA_DISABLE_11N = BIT(4),
376 IEEE80211_STA_CSA_RECEIVED = BIT(5),
377 IEEE80211_STA_MFP_ENABLED = BIT(6),
378 IEEE80211_STA_UAPSD_ENABLED = BIT(7),
379 IEEE80211_STA_NULLFUNC_ACKED = BIT(8),
380 IEEE80211_STA_RESET_SIGNAL_AVE = BIT(9),
383 struct ieee80211_if_managed {
384 struct timer_list timer;
385 struct timer_list conn_mon_timer;
386 struct timer_list bcn_mon_timer;
387 struct timer_list chswitch_timer;
388 struct work_struct monitor_work;
389 struct work_struct chswitch_work;
390 struct work_struct beacon_connection_loss_work;
392 unsigned long beacon_timeout;
393 unsigned long probe_timeout;
394 int probe_send_count;
395 bool nullfunc_failed;
398 struct cfg80211_bss *associated;
404 unsigned long timers_running; /* used for quiesce/restart */
405 bool powersave; /* powersave requested for this iface */
406 bool broken_ap; /* AP is broken -- turn off powersave */
407 enum ieee80211_smps_mode req_smps, /* requested smps mode */
408 ap_smps, /* smps mode AP thinks we're in */
409 driver_smps_mode; /* smps mode request */
411 struct work_struct request_smps_work;
415 bool beacon_crc_valid;
419 IEEE80211_MFP_DISABLED,
420 IEEE80211_MFP_OPTIONAL,
421 IEEE80211_MFP_REQUIRED
422 } mfp; /* management frame protection */
424 int wmm_last_param_set;
428 /* Signal strength from the last Beacon frame in the current BSS. */
429 int last_beacon_signal;
432 * Weighted average of the signal strength from Beacon frames in the
433 * current BSS. This is in units of 1/16 of the signal unit to maintain
434 * accuracy and to speed up calculations, i.e., the value need to be
435 * divided by 16 to get the actual value.
437 int ave_beacon_signal;
440 * Number of Beacon frames used in ave_beacon_signal. This can be used
441 * to avoid generating less reliable cqm events that would be based
442 * only on couple of received frames.
444 unsigned int count_beacon_signal;
447 * Last Beacon frame signal strength average (ave_beacon_signal / 16)
448 * that triggered a cqm event. 0 indicates that no event has been
449 * generated for the current association.
451 int last_cqm_event_signal;
454 * State variables for keeping track of RSSI of the AP currently
455 * connected to and informing driver when RSSI has gone
456 * below/above a certain threshold.
458 int rssi_min_thold, rssi_max_thold;
459 int last_ave_beacon_signal;
462 struct ieee80211_if_ibss {
463 struct timer_list timer;
467 unsigned long last_scan_completed;
478 u8 ssid[IEEE80211_MAX_SSID_LEN];
481 struct ieee80211_channel *channel;
483 unsigned long ibss_join_req;
484 /* probe response/beacon for IBSS */
485 struct sk_buff __rcu *presp;
489 IEEE80211_IBSS_MLME_SEARCH,
490 IEEE80211_IBSS_MLME_JOINED,
494 struct ieee80211_if_mesh {
495 struct timer_list housekeeping_timer;
496 struct timer_list mesh_path_timer;
497 struct timer_list mesh_path_root_timer;
499 unsigned long timers_running;
501 unsigned long wrkq_flags;
503 u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
505 /* Active Path Selection Protocol Identifier */
507 /* Active Path Selection Metric Identifier */
509 /* Congestion Control Mode Identifier */
511 /* Synchronization Protocol Identifier */
513 /* Authentication Protocol Identifier */
515 /* Local mesh Sequence Number */
517 /* Last used PREQ ID */
520 /* Timestamp of last SN update */
521 unsigned long last_sn_update;
522 /* Timestamp of last SN sent */
523 unsigned long last_preq;
524 struct mesh_rmc *rmc;
525 spinlock_t mesh_preq_queue_lock;
526 struct mesh_preq_queue preq_queue;
528 struct mesh_stats mshstats;
529 struct mesh_config mshcfg;
531 bool accepting_plinks;
536 IEEE80211_MESH_SEC_NONE = 0x0,
537 IEEE80211_MESH_SEC_AUTHED = 0x1,
538 IEEE80211_MESH_SEC_SECURED = 0x2,
542 #ifdef CONFIG_MAC80211_MESH
543 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
544 do { (msh)->mshstats.name++; } while (0)
546 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
551 * enum ieee80211_sub_if_data_flags - virtual interface flags
553 * @IEEE80211_SDATA_ALLMULTI: interface wants all multicast packets
554 * @IEEE80211_SDATA_PROMISC: interface is promisc
555 * @IEEE80211_SDATA_OPERATING_GMODE: operating in G-only mode
556 * @IEEE80211_SDATA_DONT_BRIDGE_PACKETS: bridge packets between
557 * associated stations and deliver multicast frames both
558 * back to wireless media and to the local net stack.
559 * @IEEE80211_SDATA_DISCONNECT_RESUME: Disconnect after resume.
561 enum ieee80211_sub_if_data_flags {
562 IEEE80211_SDATA_ALLMULTI = BIT(0),
563 IEEE80211_SDATA_PROMISC = BIT(1),
564 IEEE80211_SDATA_OPERATING_GMODE = BIT(2),
565 IEEE80211_SDATA_DONT_BRIDGE_PACKETS = BIT(3),
566 IEEE80211_SDATA_DISCONNECT_RESUME = BIT(4),
570 * enum ieee80211_sdata_state_bits - virtual interface state bits
571 * @SDATA_STATE_RUNNING: virtual interface is up & running; this
572 * mirrors netif_running() but is separate for interface type
573 * change handling while the interface is up
574 * @SDATA_STATE_OFFCHANNEL: This interface is currently in offchannel
575 * mode, so queues are stopped
577 enum ieee80211_sdata_state_bits {
579 SDATA_STATE_OFFCHANNEL,
582 struct ieee80211_sub_if_data {
583 struct list_head list;
585 struct wireless_dev wdev;
588 struct list_head key_list;
590 /* count for keys needing tailroom space allocation */
591 int crypto_tx_tailroom_needed_cnt;
593 struct net_device *dev;
594 struct ieee80211_local *local;
600 int drop_unencrypted;
605 * keep track of whether the HT opmode (stored in
606 * vif.bss_info.ht_operation_mode) is valid.
608 bool ht_opmode_valid;
610 /* to detect idle changes */
613 /* Fragment table for host-based reassembly */
614 struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
615 unsigned int fragment_next;
617 struct ieee80211_key __rcu *keys[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
618 struct ieee80211_key __rcu *default_unicast_key;
619 struct ieee80211_key __rcu *default_multicast_key;
620 struct ieee80211_key __rcu *default_mgmt_key;
623 __be16 control_port_protocol;
624 bool control_port_no_encrypt;
626 struct ieee80211_tx_queue_params tx_conf[IEEE80211_MAX_QUEUES];
628 struct work_struct work;
629 struct sk_buff_head skb_queue;
631 bool arp_filter_state;
634 * AP this belongs to: self in AP mode and
635 * corresponding AP in VLAN mode, NULL for
636 * all others (might be needed later in IBSS)
638 struct ieee80211_if_ap *bss;
640 /* bitmap of allowed (non-MCS) rate indexes for rate control */
641 u32 rc_rateidx_mask[IEEE80211_NUM_BANDS];
644 struct ieee80211_if_ap ap;
645 struct ieee80211_if_wds wds;
646 struct ieee80211_if_vlan vlan;
647 struct ieee80211_if_managed mgd;
648 struct ieee80211_if_ibss ibss;
649 struct ieee80211_if_mesh mesh;
653 #ifdef CONFIG_MAC80211_DEBUGFS
656 struct dentry *subdir_stations;
657 struct dentry *default_unicast_key;
658 struct dentry *default_multicast_key;
659 struct dentry *default_mgmt_key;
662 /* must be last, dynamically sized area in this! */
663 struct ieee80211_vif vif;
667 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
669 return container_of(p, struct ieee80211_sub_if_data, vif);
672 enum sdata_queue_type {
673 IEEE80211_SDATA_QUEUE_TYPE_FRAME = 0,
674 IEEE80211_SDATA_QUEUE_AGG_START = 1,
675 IEEE80211_SDATA_QUEUE_AGG_STOP = 2,
679 IEEE80211_RX_MSG = 1,
680 IEEE80211_TX_STATUS_MSG = 2,
681 IEEE80211_EOSP_MSG = 3,
684 struct skb_eosp_msg_data {
685 u8 sta[ETH_ALEN], iface[ETH_ALEN];
688 enum queue_stop_reason {
689 IEEE80211_QUEUE_STOP_REASON_DRIVER,
690 IEEE80211_QUEUE_STOP_REASON_PS,
691 IEEE80211_QUEUE_STOP_REASON_CSA,
692 IEEE80211_QUEUE_STOP_REASON_AGGREGATION,
693 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
694 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
695 IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE,
698 #ifdef CONFIG_MAC80211_LEDS
699 struct tpt_led_trigger {
700 struct led_trigger trig;
702 const struct ieee80211_tpt_blink *blink_table;
703 unsigned int blink_table_len;
704 struct timer_list timer;
705 unsigned long prev_traffic;
706 unsigned long tx_bytes, rx_bytes;
707 unsigned int active, want;
713 * mac80211 scan flags - currently active scan mode
715 * @SCAN_SW_SCANNING: We're currently in the process of scanning but may as
716 * well be on the operating channel
717 * @SCAN_HW_SCANNING: The hardware is scanning for us, we have no way to
718 * determine if we are on the operating channel or not
719 * @SCAN_OFF_CHANNEL: We're off our operating channel for scanning,
720 * gets only set in conjunction with SCAN_SW_SCANNING
721 * @SCAN_COMPLETED: Set for our scan work function when the driver reported
722 * that the scan completed.
723 * @SCAN_ABORTED: Set for our scan work function when the driver reported
724 * a scan complete for an aborted scan.
725 * @SCAN_HW_CANCELLED: Set for our scan work function when the scan is being
738 * enum mac80211_scan_state - scan state machine states
740 * @SCAN_DECISION: Main entry point to the scan state machine, this state
741 * determines if we should keep on scanning or switch back to the
743 * @SCAN_SET_CHANNEL: Set the next channel to be scanned
744 * @SCAN_SEND_PROBE: Send probe requests and wait for probe responses
745 * @SCAN_LEAVE_OPER_CHANNEL: Leave the operating channel, notify the AP
746 * about us leaving the channel and stop all associated STA interfaces
747 * @SCAN_ENTER_OPER_CHANNEL: Enter the operating channel again, notify the
748 * AP about us being back and restart all associated STA interfaces
750 enum mac80211_scan_state {
754 SCAN_LEAVE_OPER_CHANNEL,
755 SCAN_ENTER_OPER_CHANNEL,
758 struct ieee80211_local {
759 /* embed the driver visible part.
760 * don't cast (use the static inlines below), but we keep
761 * it first anyway so they become a no-op */
762 struct ieee80211_hw hw;
764 const struct ieee80211_ops *ops;
767 * work stuff, potentially off-channel (in the future)
769 struct list_head work_list;
770 struct timer_list work_timer;
771 struct work_struct work_work;
772 struct sk_buff_head work_skb_queue;
775 * private workqueue to mac80211. mac80211 makes this accessible
776 * via ieee80211_queue_work()
778 struct workqueue_struct *workqueue;
780 unsigned long queue_stop_reasons[IEEE80211_MAX_QUEUES];
781 /* also used to protect ampdu_ac_queue and amdpu_ac_stop_refcnt */
782 spinlock_t queue_stop_reason_lock;
785 int monitors, cooked_mntrs;
786 /* number of interfaces with corresponding FIF_ flags */
787 int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss, fif_pspoll,
790 unsigned int filter_flags; /* FIF_* */
792 bool wiphy_ciphers_allocated;
794 /* protects the aggregated multicast list and filter calls */
795 spinlock_t filter_lock;
797 /* used for uploading changed mc list */
798 struct work_struct reconfig_filter;
800 /* used to reconfigure hardware SM PS */
801 struct work_struct recalc_smps;
803 /* aggregated multicast list */
804 struct netdev_hw_addr_list mc_list;
806 bool tim_in_locked_section; /* see ieee80211_beacon_get() */
809 * suspended is true if we finished all the suspend _and_ we have
810 * not yet come up from resume. This is to be used by mac80211
811 * to ensure driver sanity during suspend and mac80211's own
812 * sanity. It can eventually be used for WoW as well.
817 * Resuming is true while suspended, but when we're reprogramming the
818 * hardware -- at that time it's allowed to use ieee80211_queue_work()
819 * again even though some other parts of the stack are still suspended
820 * and we still drop received frames to avoid waking the stack.
825 * quiescing is true during the suspend process _only_ to
826 * ease timer cancelling etc.
830 /* device is started */
833 /* wowlan is enabled -- don't reconfig on resume */
836 int tx_headroom; /* required headroom for hardware/radiotap */
838 /* Tasklet and skb queue to process calls from IRQ mode. All frames
839 * added to skb_queue will be processed, but frames in
840 * skb_queue_unreliable may be dropped if the total length of these
841 * queues increases over the limit. */
842 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
843 struct tasklet_struct tasklet;
844 struct sk_buff_head skb_queue;
845 struct sk_buff_head skb_queue_unreliable;
848 * Internal FIFO queue which is shared between multiple rx path
849 * stages. Its main task is to provide a serialization mechanism,
850 * so all rx handlers can enjoy having exclusive access to their
851 * private data structures.
853 struct sk_buff_head rx_skb_queue;
854 bool running_rx_handler; /* protected by rx_skb_queue.lock */
858 * The mutex only protects the list and counter,
859 * reads are done in RCU.
860 * Additionally, the lock protects the hash table,
861 * the pending list and each BSS's TIM bitmap.
863 struct mutex sta_mtx;
865 unsigned long num_sta;
866 struct list_head sta_list, sta_pending_list;
867 struct sta_info __rcu *sta_hash[STA_HASH_SIZE];
868 struct timer_list sta_cleanup;
869 struct work_struct sta_finish_work;
872 struct sk_buff_head pending[IEEE80211_MAX_QUEUES];
873 struct tasklet_struct tx_pending_tasklet;
875 atomic_t agg_queue_stop[IEEE80211_MAX_QUEUES];
877 /* number of interfaces with corresponding IFF_ flags */
878 atomic_t iff_allmultis, iff_promiscs;
880 struct rate_control_ref *rate_ctrl;
882 struct crypto_cipher *wep_tx_tfm;
883 struct crypto_cipher *wep_rx_tfm;
887 struct list_head interfaces;
888 struct mutex iflist_mtx;
891 * Key mutex, protects sdata's key_list and sta_info's
892 * key pointers (write access, they're RCU.)
894 struct mutex key_mtx;
896 /* mutex for scan and work locking */
899 /* Scanning and BSS list */
900 unsigned long scanning;
901 struct cfg80211_ssid scan_ssid;
902 struct cfg80211_scan_request *int_scan_req;
903 struct cfg80211_scan_request *scan_req, *hw_scan_req;
904 struct ieee80211_channel *scan_channel;
905 enum ieee80211_band hw_scan_band;
906 int scan_channel_idx;
910 struct ieee80211_sched_scan_ies sched_scan_ies;
911 struct work_struct sched_scan_stopped_work;
913 unsigned long leave_oper_channel_time;
914 enum mac80211_scan_state next_scan_state;
915 struct delayed_work scan_work;
916 struct ieee80211_sub_if_data *scan_sdata;
917 enum nl80211_channel_type _oper_channel_type;
918 struct ieee80211_channel *oper_channel, *csa_channel;
920 /* Temporary remain-on-channel for off-channel operations */
921 struct ieee80211_channel *tmp_channel;
922 enum nl80211_channel_type tmp_channel_type;
925 /* dot11CountersTable */
926 u32 dot11TransmittedFragmentCount;
927 u32 dot11MulticastTransmittedFrameCount;
928 u32 dot11FailedCount;
930 u32 dot11MultipleRetryCount;
931 u32 dot11FrameDuplicateCount;
932 u32 dot11ReceivedFragmentCount;
933 u32 dot11MulticastReceivedFrameCount;
934 u32 dot11TransmittedFrameCount;
936 #ifdef CONFIG_MAC80211_LEDS
937 int tx_led_counter, rx_led_counter;
938 struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led;
939 struct tpt_led_trigger *tpt_led_trigger;
940 char tx_led_name[32], rx_led_name[32],
941 assoc_led_name[32], radio_led_name[32];
944 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
945 /* TX/RX handler statistics */
946 unsigned int tx_handlers_drop;
947 unsigned int tx_handlers_queued;
948 unsigned int tx_handlers_drop_unencrypted;
949 unsigned int tx_handlers_drop_fragment;
950 unsigned int tx_handlers_drop_wep;
951 unsigned int tx_handlers_drop_not_assoc;
952 unsigned int tx_handlers_drop_unauth_port;
953 unsigned int rx_handlers_drop;
954 unsigned int rx_handlers_queued;
955 unsigned int rx_handlers_drop_nullfunc;
956 unsigned int rx_handlers_drop_defrag;
957 unsigned int rx_handlers_drop_short;
958 unsigned int rx_handlers_drop_passive_scan;
959 unsigned int tx_expand_skb_head;
960 unsigned int tx_expand_skb_head_cloned;
961 unsigned int rx_expand_skb_head;
962 unsigned int rx_expand_skb_head2;
963 unsigned int rx_handlers_fragments;
964 unsigned int tx_status_drop;
965 #define I802_DEBUG_INC(c) (c)++
966 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
967 #define I802_DEBUG_INC(c) do { } while (0)
968 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
971 int total_ps_buffered; /* total number of all buffered unicast and
972 * multicast packets for power saving stations
974 int wifi_wme_noack_test;
975 unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */
978 * Bitmask of enabled u-apsd queues,
979 * IEEE80211_WMM_IE_STA_QOSINFO_AC_BE & co. Needs a new association
982 unsigned int uapsd_queues;
985 * Maximum number of buffered frames AP can deliver during a
986 * service period, IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL or similar.
987 * Needs a new association to take effect.
989 unsigned int uapsd_max_sp_len;
992 bool offchannel_ps_enabled;
994 * PS can only be enabled when we have exactly one managed
995 * interface (and monitors) in PS, this then points there.
997 struct ieee80211_sub_if_data *ps_sdata;
998 struct work_struct dynamic_ps_enable_work;
999 struct work_struct dynamic_ps_disable_work;
1000 struct timer_list dynamic_ps_timer;
1001 struct notifier_block network_latency_notifier;
1002 struct notifier_block ifa_notifier;
1005 * The dynamic ps timeout configured from user space via WEXT -
1006 * this will override whatever chosen by mac80211 internally.
1008 int dynamic_ps_forced_timeout;
1009 int dynamic_ps_user_timeout;
1010 bool disable_dynamic_ps;
1012 int user_power_level; /* in dBm */
1013 int power_constr_level; /* in dBm */
1015 enum ieee80211_smps_mode smps_mode;
1017 struct work_struct restart_work;
1019 #ifdef CONFIG_MAC80211_DEBUGFS
1020 struct local_debugfsdentries {
1021 struct dentry *rcdir;
1022 struct dentry *keys;
1026 struct ieee80211_channel *hw_roc_channel;
1027 struct net_device *hw_roc_dev;
1028 struct sk_buff *hw_roc_skb, *hw_roc_skb_for_status;
1029 struct work_struct hw_roc_start, hw_roc_done;
1030 enum nl80211_channel_type hw_roc_channel_type;
1031 unsigned int hw_roc_duration;
1035 /* dummy netdev for use w/ NAPI */
1036 struct net_device napi_dev;
1038 struct napi_struct napi;
1041 static inline struct ieee80211_sub_if_data *
1042 IEEE80211_DEV_TO_SUB_IF(struct net_device *dev)
1044 return netdev_priv(dev);
1047 /* this struct represents 802.11n's RA/TID combination */
1048 struct ieee80211_ra_tid {
1053 static inline struct ieee80211_local *hw_to_local(
1054 struct ieee80211_hw *hw)
1056 return container_of(hw, struct ieee80211_local, hw);
1059 static inline struct ieee80211_hw *local_to_hw(
1060 struct ieee80211_local *local)
1066 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
1068 return compare_ether_addr(raddr, addr) == 0 ||
1069 is_broadcast_ether_addr(raddr);
1073 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed);
1074 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
1075 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
1077 void ieee80211_configure_filter(struct ieee80211_local *local);
1078 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
1081 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata);
1082 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
1083 struct cfg80211_auth_request *req);
1084 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
1085 struct cfg80211_assoc_request *req);
1086 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
1087 struct cfg80211_deauth_request *req,
1089 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
1090 struct cfg80211_disassoc_request *req,
1092 void ieee80211_send_pspoll(struct ieee80211_local *local,
1093 struct ieee80211_sub_if_data *sdata);
1094 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency);
1095 int ieee80211_max_network_latency(struct notifier_block *nb,
1096 unsigned long data, void *dummy);
1097 int ieee80211_set_arp_filter(struct ieee80211_sub_if_data *sdata);
1098 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1099 struct ieee80211_channel_sw_ie *sw_elem,
1100 struct ieee80211_bss *bss,
1102 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata);
1103 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata);
1104 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata);
1105 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1106 struct sk_buff *skb);
1107 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata);
1108 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata);
1111 void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local);
1112 void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata);
1113 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
1114 u8 *bssid, u8 *addr, u32 supp_rates,
1116 int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
1117 struct cfg80211_ibss_params *params);
1118 int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata);
1119 void ieee80211_ibss_quiesce(struct ieee80211_sub_if_data *sdata);
1120 void ieee80211_ibss_restart(struct ieee80211_sub_if_data *sdata);
1121 void ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata);
1122 void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1123 struct sk_buff *skb);
1126 void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata);
1127 void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1128 struct sk_buff *skb);
1130 /* scan/BSS handling */
1131 void ieee80211_scan_work(struct work_struct *work);
1132 int ieee80211_request_internal_scan(struct ieee80211_sub_if_data *sdata,
1133 const u8 *ssid, u8 ssid_len,
1134 struct ieee80211_channel *chan);
1135 int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
1136 struct cfg80211_scan_request *req);
1137 void ieee80211_scan_cancel(struct ieee80211_local *local);
1139 ieee80211_scan_rx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
1141 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local);
1142 struct ieee80211_bss *
1143 ieee80211_bss_info_update(struct ieee80211_local *local,
1144 struct ieee80211_rx_status *rx_status,
1145 struct ieee80211_mgmt *mgmt,
1147 struct ieee802_11_elems *elems,
1148 struct ieee80211_channel *channel,
1150 struct ieee80211_bss *
1151 ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq,
1152 u8 *ssid, u8 ssid_len);
1153 void ieee80211_rx_bss_put(struct ieee80211_local *local,
1154 struct ieee80211_bss *bss);
1156 /* scheduled scan handling */
1157 int ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata,
1158 struct cfg80211_sched_scan_request *req);
1159 int ieee80211_request_sched_scan_stop(struct ieee80211_sub_if_data *sdata);
1160 void ieee80211_sched_scan_stopped_work(struct work_struct *work);
1162 /* off-channel helpers */
1163 void ieee80211_offchannel_stop_beaconing(struct ieee80211_local *local);
1164 void ieee80211_offchannel_stop_station(struct ieee80211_local *local);
1165 void ieee80211_offchannel_return(struct ieee80211_local *local,
1166 bool enable_beaconing);
1167 void ieee80211_hw_roc_setup(struct ieee80211_local *local);
1169 /* interface handling */
1170 int ieee80211_iface_init(void);
1171 void ieee80211_iface_exit(void);
1172 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1173 struct net_device **new_dev, enum nl80211_iftype type,
1174 struct vif_params *params);
1175 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1176 enum nl80211_iftype type);
1177 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata);
1178 void ieee80211_remove_interfaces(struct ieee80211_local *local);
1179 u32 __ieee80211_recalc_idle(struct ieee80211_local *local);
1180 void ieee80211_recalc_idle(struct ieee80211_local *local);
1181 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
1184 static inline bool ieee80211_sdata_running(struct ieee80211_sub_if_data *sdata)
1186 return test_bit(SDATA_STATE_RUNNING, &sdata->state);
1190 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
1191 void ieee80211_tx_pending(unsigned long data);
1192 netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
1193 struct net_device *dev);
1194 netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
1195 struct net_device *dev);
1198 void ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_supported_band *sband,
1199 struct ieee80211_ht_cap *ht_cap_ie,
1200 struct ieee80211_sta_ht_cap *ht_cap);
1201 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
1202 const u8 *da, u16 tid,
1203 u16 initiator, u16 reason_code);
1204 int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata,
1205 enum ieee80211_smps_mode smps, const u8 *da,
1207 void ieee80211_request_smps_work(struct work_struct *work);
1209 void ___ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1210 u16 initiator, u16 reason, bool stop);
1211 void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1212 u16 initiator, u16 reason, bool stop);
1213 void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta, bool tx);
1214 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
1215 struct sta_info *sta,
1216 struct ieee80211_mgmt *mgmt, size_t len);
1217 void ieee80211_process_addba_resp(struct ieee80211_local *local,
1218 struct sta_info *sta,
1219 struct ieee80211_mgmt *mgmt,
1221 void ieee80211_process_addba_request(struct ieee80211_local *local,
1222 struct sta_info *sta,
1223 struct ieee80211_mgmt *mgmt,
1226 int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1227 enum ieee80211_back_parties initiator,
1229 int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1230 enum ieee80211_back_parties initiator,
1232 void ieee80211_start_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u16 tid);
1233 void ieee80211_stop_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u8 tid);
1234 void ieee80211_ba_session_work(struct work_struct *work);
1235 void ieee80211_tx_ba_session_handle_start(struct sta_info *sta, int tid);
1236 void ieee80211_release_reorder_timeout(struct sta_info *sta, int tid);
1238 /* Spectrum management */
1239 void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata,
1240 struct ieee80211_mgmt *mgmt,
1243 /* Suspend/resume and hw reconfiguration */
1244 int ieee80211_reconfig(struct ieee80211_local *local);
1245 void ieee80211_stop_device(struct ieee80211_local *local);
1248 int __ieee80211_suspend(struct ieee80211_hw *hw,
1249 struct cfg80211_wowlan *wowlan);
1251 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
1253 struct ieee80211_local *local = hw_to_local(hw);
1255 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
1256 "%s: resume with hardware scan still in progress\n",
1257 wiphy_name(hw->wiphy));
1259 return ieee80211_reconfig(hw_to_local(hw));
1262 static inline int __ieee80211_suspend(struct ieee80211_hw *hw,
1263 struct cfg80211_wowlan *wowlan)
1268 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
1274 /* utility functions/constants */
1275 extern void *mac80211_wiphy_privid; /* for wiphy privid */
1276 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
1277 enum nl80211_iftype type);
1278 int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
1279 int rate, int erp, int short_preamble);
1280 void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx,
1281 struct ieee80211_hdr *hdr, const u8 *tsc,
1283 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata);
1284 void ieee80211_xmit(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
1285 void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
1286 void ieee802_11_parse_elems(u8 *start, size_t len,
1287 struct ieee802_11_elems *elems);
1288 u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
1289 struct ieee802_11_elems *elems,
1290 u64 filter, u32 crc);
1291 u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
1292 enum ieee80211_band band);
1294 void ieee80211_dynamic_ps_enable_work(struct work_struct *work);
1295 void ieee80211_dynamic_ps_disable_work(struct work_struct *work);
1296 void ieee80211_dynamic_ps_timer(unsigned long data);
1297 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1298 struct ieee80211_sub_if_data *sdata,
1300 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1301 struct ieee80211_hdr *hdr);
1302 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1303 struct ieee80211_hdr *hdr, bool ack);
1304 void ieee80211_beacon_connection_loss_work(struct work_struct *work);
1306 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
1307 enum queue_stop_reason reason);
1308 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
1309 enum queue_stop_reason reason);
1310 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
1311 enum queue_stop_reason reason);
1312 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
1313 enum queue_stop_reason reason);
1314 void ieee80211_add_pending_skb(struct ieee80211_local *local,
1315 struct sk_buff *skb);
1316 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
1317 struct sk_buff_head *skbs);
1318 void ieee80211_add_pending_skbs_fn(struct ieee80211_local *local,
1319 struct sk_buff_head *skbs,
1320 void (*fn)(void *data), void *data);
1322 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1323 u16 transaction, u16 auth_alg,
1324 u8 *extra, size_t extra_len, const u8 *bssid,
1325 const u8 *key, u8 key_len, u8 key_idx);
1326 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1327 const u8 *ie, size_t ie_len,
1328 enum ieee80211_band band, u32 rate_mask,
1330 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1331 u8 *dst, u32 ratemask,
1332 const u8 *ssid, size_t ssid_len,
1333 const u8 *ie, size_t ie_len,
1335 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1336 const u8 *ssid, size_t ssid_len,
1337 const u8 *ie, size_t ie_len,
1338 u32 ratemask, bool directed, bool no_cck);
1340 void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
1341 const size_t supp_rates_len,
1342 const u8 *supp_rates);
1343 u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
1344 struct ieee802_11_elems *elems,
1345 enum ieee80211_band band);
1346 int __ieee80211_request_smps(struct ieee80211_sub_if_data *sdata,
1347 enum ieee80211_smps_mode smps_mode);
1348 void ieee80211_recalc_smps(struct ieee80211_local *local);
1350 size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
1351 const u8 *ids, int n_ids, size_t offset);
1352 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset);
1354 /* internal work items */
1355 void ieee80211_work_init(struct ieee80211_local *local);
1356 void ieee80211_add_work(struct ieee80211_work *wk);
1357 void free_work(struct ieee80211_work *wk);
1358 void ieee80211_work_purge(struct ieee80211_sub_if_data *sdata);
1359 ieee80211_rx_result ieee80211_work_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1360 struct sk_buff *skb);
1361 int ieee80211_wk_remain_on_channel(struct ieee80211_sub_if_data *sdata,
1362 struct ieee80211_channel *chan,
1363 enum nl80211_channel_type channel_type,
1364 unsigned int duration, u64 *cookie);
1365 int ieee80211_wk_cancel_remain_on_channel(
1366 struct ieee80211_sub_if_data *sdata, u64 cookie);
1368 /* channel management */
1369 enum ieee80211_chan_mode {
1370 CHAN_MODE_UNDEFINED,
1375 enum ieee80211_chan_mode
1376 ieee80211_get_channel_mode(struct ieee80211_local *local,
1377 struct ieee80211_sub_if_data *ignore);
1378 bool ieee80211_set_channel_type(struct ieee80211_local *local,
1379 struct ieee80211_sub_if_data *sdata,
1380 enum nl80211_channel_type chantype);
1382 #ifdef CONFIG_MAC80211_NOINLINE
1383 #define debug_noinline noinline
1385 #define debug_noinline
1388 #endif /* IEEE80211_I_H */