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 __u32 dropped_frames_congestion;/* Not forwarded due to congestion */
265 atomic_t estab_plinks;
268 #define PREQ_Q_F_START 0x1
269 #define PREQ_Q_F_REFRESH 0x2
270 struct mesh_preq_queue {
271 struct list_head list;
276 enum ieee80211_work_type {
277 IEEE80211_WORK_ABORT,
278 IEEE80211_WORK_DIRECT_PROBE,
280 IEEE80211_WORK_ASSOC_BEACON_WAIT,
281 IEEE80211_WORK_ASSOC,
282 IEEE80211_WORK_REMAIN_ON_CHANNEL,
283 IEEE80211_WORK_OFFCHANNEL_TX,
287 * enum work_done_result - indicates what to do after work was done
289 * @WORK_DONE_DESTROY: This work item is no longer needed, destroy.
290 * @WORK_DONE_REQUEUE: This work item was reset to be reused, and
291 * should be requeued.
293 enum work_done_result {
298 struct ieee80211_work {
299 struct list_head list;
301 struct rcu_head rcu_head;
303 struct ieee80211_sub_if_data *sdata;
305 enum work_done_result (*done)(struct ieee80211_work *wk,
306 struct sk_buff *skb);
308 struct ieee80211_channel *chan;
309 enum nl80211_channel_type chan_type;
311 unsigned long timeout;
312 enum ieee80211_work_type type;
314 u8 filter_ta[ETH_ALEN];
321 u16 algorithm, transaction;
322 u8 ssid[IEEE80211_MAX_SSID_LEN];
324 u8 key[WLAN_KEY_LEN_WEP104];
330 struct cfg80211_bss *bss;
331 const u8 *supp_rates;
332 const u8 *ht_information_ie;
333 enum ieee80211_smps_mode smps;
336 u8 prev_bssid[ETH_ALEN];
337 u8 ssid[IEEE80211_MAX_SSID_LEN];
340 bool wmm_used, use_11n, uapsd_used;
347 struct sk_buff *frame;
357 /* flags used in struct ieee80211_if_managed.flags */
358 enum ieee80211_sta_flags {
359 IEEE80211_STA_BEACON_POLL = BIT(0),
360 IEEE80211_STA_CONNECTION_POLL = BIT(1),
361 IEEE80211_STA_CONTROL_PORT = BIT(2),
362 IEEE80211_STA_DISABLE_11N = BIT(4),
363 IEEE80211_STA_CSA_RECEIVED = BIT(5),
364 IEEE80211_STA_MFP_ENABLED = BIT(6),
365 IEEE80211_STA_UAPSD_ENABLED = BIT(7),
366 IEEE80211_STA_NULLFUNC_ACKED = BIT(8),
367 IEEE80211_STA_RESET_SIGNAL_AVE = BIT(9),
370 struct ieee80211_if_managed {
371 struct timer_list timer;
372 struct timer_list conn_mon_timer;
373 struct timer_list bcn_mon_timer;
374 struct timer_list chswitch_timer;
375 struct work_struct monitor_work;
376 struct work_struct chswitch_work;
377 struct work_struct beacon_connection_loss_work;
379 unsigned long beacon_timeout;
380 unsigned long probe_timeout;
381 int probe_send_count;
382 bool nullfunc_failed;
385 struct cfg80211_bss *associated;
391 unsigned long timers_running; /* used for quiesce/restart */
392 bool powersave; /* powersave requested for this iface */
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 work_struct work;
613 struct sk_buff_head skb_queue;
615 bool arp_filter_state;
618 * AP this belongs to: self in AP mode and
619 * corresponding AP in VLAN mode, NULL for
620 * all others (might be needed later in IBSS)
622 struct ieee80211_if_ap *bss;
624 /* bitmap of allowed (non-MCS) rate indexes for rate control */
625 u32 rc_rateidx_mask[IEEE80211_NUM_BANDS];
628 struct ieee80211_if_ap ap;
629 struct ieee80211_if_wds wds;
630 struct ieee80211_if_vlan vlan;
631 struct ieee80211_if_managed mgd;
632 struct ieee80211_if_ibss ibss;
633 struct ieee80211_if_mesh mesh;
637 #ifdef CONFIG_MAC80211_DEBUGFS
640 struct dentry *subdir_stations;
641 struct dentry *default_unicast_key;
642 struct dentry *default_multicast_key;
643 struct dentry *default_mgmt_key;
646 /* must be last, dynamically sized area in this! */
647 struct ieee80211_vif vif;
651 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
653 return container_of(p, struct ieee80211_sub_if_data, vif);
656 enum sdata_queue_type {
657 IEEE80211_SDATA_QUEUE_TYPE_FRAME = 0,
658 IEEE80211_SDATA_QUEUE_AGG_START = 1,
659 IEEE80211_SDATA_QUEUE_AGG_STOP = 2,
663 IEEE80211_RX_MSG = 1,
664 IEEE80211_TX_STATUS_MSG = 2,
667 enum queue_stop_reason {
668 IEEE80211_QUEUE_STOP_REASON_DRIVER,
669 IEEE80211_QUEUE_STOP_REASON_PS,
670 IEEE80211_QUEUE_STOP_REASON_CSA,
671 IEEE80211_QUEUE_STOP_REASON_AGGREGATION,
672 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
673 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
674 IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE,
677 #ifdef CONFIG_MAC80211_LEDS
678 struct tpt_led_trigger {
679 struct led_trigger trig;
681 const struct ieee80211_tpt_blink *blink_table;
682 unsigned int blink_table_len;
683 struct timer_list timer;
684 unsigned long prev_traffic;
685 unsigned long tx_bytes, rx_bytes;
686 unsigned int active, want;
692 * mac80211 scan flags - currently active scan mode
694 * @SCAN_SW_SCANNING: We're currently in the process of scanning but may as
695 * well be on the operating channel
696 * @SCAN_HW_SCANNING: The hardware is scanning for us, we have no way to
697 * determine if we are on the operating channel or not
698 * @SCAN_COMPLETED: Set for our scan work function when the driver reported
699 * that the scan completed.
700 * @SCAN_ABORTED: Set for our scan work function when the driver reported
701 * a scan complete for an aborted scan.
711 * enum mac80211_scan_state - scan state machine states
713 * @SCAN_DECISION: Main entry point to the scan state machine, this state
714 * determines if we should keep on scanning or switch back to the
716 * @SCAN_SET_CHANNEL: Set the next channel to be scanned
717 * @SCAN_SEND_PROBE: Send probe requests and wait for probe responses
718 * @SCAN_LEAVE_OPER_CHANNEL: Leave the operating channel, notify the AP
719 * about us leaving the channel and stop all associated STA interfaces
720 * @SCAN_ENTER_OPER_CHANNEL: Enter the operating channel again, notify the
721 * AP about us being back and restart all associated STA interfaces
723 enum mac80211_scan_state {
727 SCAN_LEAVE_OPER_CHANNEL,
728 SCAN_ENTER_OPER_CHANNEL,
731 struct ieee80211_local {
732 /* embed the driver visible part.
733 * don't cast (use the static inlines below), but we keep
734 * it first anyway so they become a no-op */
735 struct ieee80211_hw hw;
737 const struct ieee80211_ops *ops;
740 * work stuff, potentially off-channel (in the future)
742 struct list_head work_list;
743 struct timer_list work_timer;
744 struct work_struct work_work;
745 struct sk_buff_head work_skb_queue;
748 * private workqueue to mac80211. mac80211 makes this accessible
749 * via ieee80211_queue_work()
751 struct workqueue_struct *workqueue;
753 unsigned long queue_stop_reasons[IEEE80211_MAX_QUEUES];
754 struct ieee80211_tx_queue_params tx_conf[IEEE80211_MAX_QUEUES];
755 /* also used to protect ampdu_ac_queue and amdpu_ac_stop_refcnt */
756 spinlock_t queue_stop_reason_lock;
759 int monitors, cooked_mntrs;
760 /* number of interfaces with corresponding FIF_ flags */
761 int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss, fif_pspoll,
764 unsigned int filter_flags; /* FIF_* */
766 bool wiphy_ciphers_allocated;
768 /* protects the aggregated multicast list and filter calls */
769 spinlock_t filter_lock;
771 /* used for uploading changed mc list */
772 struct work_struct reconfig_filter;
774 /* used to reconfigure hardware SM PS */
775 struct work_struct recalc_smps;
777 /* aggregated multicast list */
778 struct netdev_hw_addr_list mc_list;
780 bool tim_in_locked_section; /* see ieee80211_beacon_get() */
783 * suspended is true if we finished all the suspend _and_ we have
784 * not yet come up from resume. This is to be used by mac80211
785 * to ensure driver sanity during suspend and mac80211's own
786 * sanity. It can eventually be used for WoW as well.
791 * Resuming is true while suspended, but when we're reprogramming the
792 * hardware -- at that time it's allowed to use ieee80211_queue_work()
793 * again even though some other parts of the stack are still suspended
794 * and we still drop received frames to avoid waking the stack.
799 * quiescing is true during the suspend process _only_ to
800 * ease timer cancelling etc.
804 /* device is started */
807 /* wowlan is enabled -- don't reconfig on resume */
810 int tx_headroom; /* required headroom for hardware/radiotap */
812 /* Tasklet and skb queue to process calls from IRQ mode. All frames
813 * added to skb_queue will be processed, but frames in
814 * skb_queue_unreliable may be dropped if the total length of these
815 * queues increases over the limit. */
816 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
817 struct tasklet_struct tasklet;
818 struct sk_buff_head skb_queue;
819 struct sk_buff_head skb_queue_unreliable;
822 * Internal FIFO queue which is shared between multiple rx path
823 * stages. Its main task is to provide a serialization mechanism,
824 * so all rx handlers can enjoy having exclusive access to their
825 * private data structures.
827 struct sk_buff_head rx_skb_queue;
828 bool running_rx_handler; /* protected by rx_skb_queue.lock */
832 * The mutex only protects the list and counter,
833 * reads are done in RCU.
834 * Additionally, the lock protects the hash table,
835 * the pending list and each BSS's TIM bitmap.
837 struct mutex sta_mtx;
839 unsigned long num_sta;
840 struct list_head sta_list, sta_pending_list;
841 struct sta_info __rcu *sta_hash[STA_HASH_SIZE];
842 struct timer_list sta_cleanup;
843 struct work_struct sta_finish_work;
846 struct sk_buff_head pending[IEEE80211_MAX_QUEUES];
847 struct tasklet_struct tx_pending_tasklet;
849 atomic_t agg_queue_stop[IEEE80211_MAX_QUEUES];
851 /* number of interfaces with corresponding IFF_ flags */
852 atomic_t iff_allmultis, iff_promiscs;
854 struct rate_control_ref *rate_ctrl;
856 struct crypto_cipher *wep_tx_tfm;
857 struct crypto_cipher *wep_rx_tfm;
861 struct list_head interfaces;
862 struct mutex iflist_mtx;
865 * Key mutex, protects sdata's key_list and sta_info's
866 * key pointers (write access, they're RCU.)
868 struct mutex key_mtx;
870 /* mutex for scan and work locking */
873 /* Scanning and BSS list */
874 unsigned long scanning;
875 struct cfg80211_ssid scan_ssid;
876 struct cfg80211_scan_request *int_scan_req;
877 struct cfg80211_scan_request *scan_req, *hw_scan_req;
878 struct ieee80211_channel *scan_channel;
879 enum ieee80211_band hw_scan_band;
880 int scan_channel_idx;
884 struct ieee80211_sched_scan_ies sched_scan_ies;
885 struct work_struct sched_scan_stopped_work;
887 unsigned long leave_oper_channel_time;
888 enum mac80211_scan_state next_scan_state;
889 struct delayed_work scan_work;
890 struct ieee80211_sub_if_data *scan_sdata;
891 enum nl80211_channel_type _oper_channel_type;
892 struct ieee80211_channel *oper_channel, *csa_channel;
894 /* Temporary remain-on-channel for off-channel operations */
895 struct ieee80211_channel *tmp_channel;
896 enum nl80211_channel_type tmp_channel_type;
899 /* dot11CountersTable */
900 u32 dot11TransmittedFragmentCount;
901 u32 dot11MulticastTransmittedFrameCount;
902 u32 dot11FailedCount;
904 u32 dot11MultipleRetryCount;
905 u32 dot11FrameDuplicateCount;
906 u32 dot11ReceivedFragmentCount;
907 u32 dot11MulticastReceivedFrameCount;
908 u32 dot11TransmittedFrameCount;
910 #ifdef CONFIG_MAC80211_LEDS
911 int tx_led_counter, rx_led_counter;
912 struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led;
913 struct tpt_led_trigger *tpt_led_trigger;
914 char tx_led_name[32], rx_led_name[32],
915 assoc_led_name[32], radio_led_name[32];
918 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
919 /* TX/RX handler statistics */
920 unsigned int tx_handlers_drop;
921 unsigned int tx_handlers_queued;
922 unsigned int tx_handlers_drop_unencrypted;
923 unsigned int tx_handlers_drop_fragment;
924 unsigned int tx_handlers_drop_wep;
925 unsigned int tx_handlers_drop_not_assoc;
926 unsigned int tx_handlers_drop_unauth_port;
927 unsigned int rx_handlers_drop;
928 unsigned int rx_handlers_queued;
929 unsigned int rx_handlers_drop_nullfunc;
930 unsigned int rx_handlers_drop_defrag;
931 unsigned int rx_handlers_drop_short;
932 unsigned int rx_handlers_drop_passive_scan;
933 unsigned int tx_expand_skb_head;
934 unsigned int tx_expand_skb_head_cloned;
935 unsigned int rx_expand_skb_head;
936 unsigned int rx_expand_skb_head2;
937 unsigned int rx_handlers_fragments;
938 unsigned int tx_status_drop;
939 #define I802_DEBUG_INC(c) (c)++
940 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
941 #define I802_DEBUG_INC(c) do { } while (0)
942 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
945 int total_ps_buffered; /* total number of all buffered unicast and
946 * multicast packets for power saving stations
948 int wifi_wme_noack_test;
949 unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */
952 * Bitmask of enabled u-apsd queues,
953 * IEEE80211_WMM_IE_STA_QOSINFO_AC_BE & co. Needs a new association
956 unsigned int uapsd_queues;
959 * Maximum number of buffered frames AP can deliver during a
960 * service period, IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL or similar.
961 * Needs a new association to take effect.
963 unsigned int uapsd_max_sp_len;
966 bool offchannel_ps_enabled;
968 * PS can only be enabled when we have exactly one managed
969 * interface (and monitors) in PS, this then points there.
971 struct ieee80211_sub_if_data *ps_sdata;
972 struct work_struct dynamic_ps_enable_work;
973 struct work_struct dynamic_ps_disable_work;
974 struct timer_list dynamic_ps_timer;
975 struct notifier_block network_latency_notifier;
976 struct notifier_block ifa_notifier;
979 * The dynamic ps timeout configured from user space via WEXT -
980 * this will override whatever chosen by mac80211 internally.
982 int dynamic_ps_forced_timeout;
983 int dynamic_ps_user_timeout;
984 bool disable_dynamic_ps;
986 int user_power_level; /* in dBm */
987 int power_constr_level; /* in dBm */
989 enum ieee80211_smps_mode smps_mode;
991 struct work_struct restart_work;
993 #ifdef CONFIG_MAC80211_DEBUGFS
994 struct local_debugfsdentries {
995 struct dentry *rcdir;
1000 struct ieee80211_channel *hw_roc_channel;
1001 struct net_device *hw_roc_dev;
1002 struct sk_buff *hw_roc_skb, *hw_roc_skb_for_status;
1003 struct work_struct hw_roc_start, hw_roc_done;
1004 enum nl80211_channel_type hw_roc_channel_type;
1005 unsigned int hw_roc_duration;
1009 /* dummy netdev for use w/ NAPI */
1010 struct net_device napi_dev;
1012 struct napi_struct napi;
1015 static inline struct ieee80211_sub_if_data *
1016 IEEE80211_DEV_TO_SUB_IF(struct net_device *dev)
1018 return netdev_priv(dev);
1021 /* this struct represents 802.11n's RA/TID combination */
1022 struct ieee80211_ra_tid {
1027 static inline struct ieee80211_local *hw_to_local(
1028 struct ieee80211_hw *hw)
1030 return container_of(hw, struct ieee80211_local, hw);
1033 static inline struct ieee80211_hw *local_to_hw(
1034 struct ieee80211_local *local)
1040 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
1042 return compare_ether_addr(raddr, addr) == 0 ||
1043 is_broadcast_ether_addr(raddr);
1047 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed);
1048 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
1049 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
1051 void ieee80211_configure_filter(struct ieee80211_local *local);
1052 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
1055 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata);
1056 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
1057 struct cfg80211_auth_request *req);
1058 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
1059 struct cfg80211_assoc_request *req);
1060 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
1061 struct cfg80211_deauth_request *req,
1063 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
1064 struct cfg80211_disassoc_request *req,
1066 void ieee80211_send_pspoll(struct ieee80211_local *local,
1067 struct ieee80211_sub_if_data *sdata);
1068 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency);
1069 int ieee80211_max_network_latency(struct notifier_block *nb,
1070 unsigned long data, void *dummy);
1071 int ieee80211_set_arp_filter(struct ieee80211_sub_if_data *sdata);
1072 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1073 struct ieee80211_channel_sw_ie *sw_elem,
1074 struct ieee80211_bss *bss,
1076 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata);
1077 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata);
1078 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata);
1079 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1080 struct sk_buff *skb);
1081 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata);
1082 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata);
1085 void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local);
1086 void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata);
1087 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
1088 u8 *bssid, u8 *addr, u32 supp_rates,
1090 int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
1091 struct cfg80211_ibss_params *params);
1092 int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata);
1093 void ieee80211_ibss_quiesce(struct ieee80211_sub_if_data *sdata);
1094 void ieee80211_ibss_restart(struct ieee80211_sub_if_data *sdata);
1095 void ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata);
1096 void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1097 struct sk_buff *skb);
1100 void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata);
1101 void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1102 struct sk_buff *skb);
1104 /* scan/BSS handling */
1105 void ieee80211_scan_work(struct work_struct *work);
1106 int ieee80211_request_internal_scan(struct ieee80211_sub_if_data *sdata,
1107 const u8 *ssid, u8 ssid_len,
1108 struct ieee80211_channel *chan);
1109 int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
1110 struct cfg80211_scan_request *req);
1111 void ieee80211_scan_cancel(struct ieee80211_local *local);
1113 ieee80211_scan_rx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
1115 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local);
1116 struct ieee80211_bss *
1117 ieee80211_bss_info_update(struct ieee80211_local *local,
1118 struct ieee80211_rx_status *rx_status,
1119 struct ieee80211_mgmt *mgmt,
1121 struct ieee802_11_elems *elems,
1122 struct ieee80211_channel *channel,
1124 struct ieee80211_bss *
1125 ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq,
1126 u8 *ssid, u8 ssid_len);
1127 void ieee80211_rx_bss_put(struct ieee80211_local *local,
1128 struct ieee80211_bss *bss);
1130 /* scheduled scan handling */
1131 int ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata,
1132 struct cfg80211_sched_scan_request *req);
1133 int ieee80211_request_sched_scan_stop(struct ieee80211_sub_if_data *sdata);
1134 void ieee80211_sched_scan_stopped_work(struct work_struct *work);
1136 /* off-channel helpers */
1137 bool ieee80211_cfg_on_oper_channel(struct ieee80211_local *local);
1138 void ieee80211_offchannel_enable_all_ps(struct ieee80211_local *local,
1140 void ieee80211_offchannel_stop_vifs(struct ieee80211_local *local,
1141 bool offchannel_ps_enable);
1142 void ieee80211_offchannel_return(struct ieee80211_local *local,
1143 bool enable_beaconing,
1144 bool offchannel_ps_disable);
1145 void ieee80211_hw_roc_setup(struct ieee80211_local *local);
1147 /* interface handling */
1148 int ieee80211_iface_init(void);
1149 void ieee80211_iface_exit(void);
1150 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1151 struct net_device **new_dev, enum nl80211_iftype type,
1152 struct vif_params *params);
1153 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1154 enum nl80211_iftype type);
1155 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata);
1156 void ieee80211_remove_interfaces(struct ieee80211_local *local);
1157 u32 __ieee80211_recalc_idle(struct ieee80211_local *local);
1158 void ieee80211_recalc_idle(struct ieee80211_local *local);
1159 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
1162 static inline bool ieee80211_sdata_running(struct ieee80211_sub_if_data *sdata)
1164 return test_bit(SDATA_STATE_RUNNING, &sdata->state);
1168 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
1169 void ieee80211_tx_pending(unsigned long data);
1170 netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
1171 struct net_device *dev);
1172 netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
1173 struct net_device *dev);
1176 * radiotap header for status frames
1178 struct ieee80211_tx_status_rtap_hdr {
1179 struct ieee80211_radiotap_header hdr;
1181 u8 padding_for_rate;
1188 void ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_supported_band *sband,
1189 struct ieee80211_ht_cap *ht_cap_ie,
1190 struct ieee80211_sta_ht_cap *ht_cap);
1191 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
1192 const u8 *da, u16 tid,
1193 u16 initiator, u16 reason_code);
1194 int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata,
1195 enum ieee80211_smps_mode smps, const u8 *da,
1197 void ieee80211_request_smps_work(struct work_struct *work);
1199 void ___ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1200 u16 initiator, u16 reason, bool stop);
1201 void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1202 u16 initiator, u16 reason, bool stop);
1203 void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta, bool tx);
1204 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
1205 struct sta_info *sta,
1206 struct ieee80211_mgmt *mgmt, size_t len);
1207 void ieee80211_process_addba_resp(struct ieee80211_local *local,
1208 struct sta_info *sta,
1209 struct ieee80211_mgmt *mgmt,
1211 void ieee80211_process_addba_request(struct ieee80211_local *local,
1212 struct sta_info *sta,
1213 struct ieee80211_mgmt *mgmt,
1216 int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1217 enum ieee80211_back_parties initiator,
1219 int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1220 enum ieee80211_back_parties initiator,
1222 void ieee80211_start_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u16 tid);
1223 void ieee80211_stop_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u8 tid);
1224 void ieee80211_ba_session_work(struct work_struct *work);
1225 void ieee80211_tx_ba_session_handle_start(struct sta_info *sta, int tid);
1226 void ieee80211_release_reorder_timeout(struct sta_info *sta, int tid);
1228 /* Spectrum management */
1229 void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata,
1230 struct ieee80211_mgmt *mgmt,
1233 /* Suspend/resume and hw reconfiguration */
1234 int ieee80211_reconfig(struct ieee80211_local *local);
1235 void ieee80211_stop_device(struct ieee80211_local *local);
1238 int __ieee80211_suspend(struct ieee80211_hw *hw,
1239 struct cfg80211_wowlan *wowlan);
1241 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
1243 struct ieee80211_local *local = hw_to_local(hw);
1245 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
1246 "%s: resume with hardware scan still in progress\n",
1247 wiphy_name(hw->wiphy));
1249 return ieee80211_reconfig(hw_to_local(hw));
1252 static inline int __ieee80211_suspend(struct ieee80211_hw *hw,
1253 struct cfg80211_wowlan *wowlan)
1258 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
1264 /* utility functions/constants */
1265 extern void *mac80211_wiphy_privid; /* for wiphy privid */
1266 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
1267 enum nl80211_iftype type);
1268 int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
1269 int rate, int erp, int short_preamble);
1270 void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx,
1271 struct ieee80211_hdr *hdr, const u8 *tsc,
1273 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata);
1274 void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
1275 void ieee802_11_parse_elems(u8 *start, size_t len,
1276 struct ieee802_11_elems *elems);
1277 u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
1278 struct ieee802_11_elems *elems,
1279 u64 filter, u32 crc);
1280 u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
1281 enum ieee80211_band band);
1283 void ieee80211_dynamic_ps_enable_work(struct work_struct *work);
1284 void ieee80211_dynamic_ps_disable_work(struct work_struct *work);
1285 void ieee80211_dynamic_ps_timer(unsigned long data);
1286 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1287 struct ieee80211_sub_if_data *sdata,
1289 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1290 struct ieee80211_hdr *hdr);
1291 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1292 struct ieee80211_hdr *hdr, bool ack);
1293 void ieee80211_beacon_connection_loss_work(struct work_struct *work);
1295 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
1296 enum queue_stop_reason reason);
1297 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
1298 enum queue_stop_reason reason);
1299 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
1300 enum queue_stop_reason reason);
1301 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
1302 enum queue_stop_reason reason);
1303 void ieee80211_add_pending_skb(struct ieee80211_local *local,
1304 struct sk_buff *skb);
1305 int ieee80211_add_pending_skbs(struct ieee80211_local *local,
1306 struct sk_buff_head *skbs);
1307 int ieee80211_add_pending_skbs_fn(struct ieee80211_local *local,
1308 struct sk_buff_head *skbs,
1309 void (*fn)(void *data), void *data);
1311 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1312 u16 transaction, u16 auth_alg,
1313 u8 *extra, size_t extra_len, const u8 *bssid,
1314 const u8 *key, u8 key_len, u8 key_idx);
1315 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1316 const u8 *ie, size_t ie_len,
1317 enum ieee80211_band band, u32 rate_mask,
1319 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1320 u8 *dst, u32 ratemask,
1321 const u8 *ssid, size_t ssid_len,
1322 const u8 *ie, size_t ie_len,
1324 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1325 const u8 *ssid, size_t ssid_len,
1326 const u8 *ie, size_t ie_len,
1327 u32 ratemask, bool directed);
1329 void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
1330 const size_t supp_rates_len,
1331 const u8 *supp_rates);
1332 u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
1333 struct ieee802_11_elems *elems,
1334 enum ieee80211_band band);
1335 int __ieee80211_request_smps(struct ieee80211_sub_if_data *sdata,
1336 enum ieee80211_smps_mode smps_mode);
1337 void ieee80211_recalc_smps(struct ieee80211_local *local);
1339 size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
1340 const u8 *ids, int n_ids, size_t offset);
1341 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset);
1343 /* internal work items */
1344 void ieee80211_work_init(struct ieee80211_local *local);
1345 void ieee80211_add_work(struct ieee80211_work *wk);
1346 void free_work(struct ieee80211_work *wk);
1347 void ieee80211_work_purge(struct ieee80211_sub_if_data *sdata);
1348 ieee80211_rx_result ieee80211_work_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1349 struct sk_buff *skb);
1350 int ieee80211_wk_remain_on_channel(struct ieee80211_sub_if_data *sdata,
1351 struct ieee80211_channel *chan,
1352 enum nl80211_channel_type channel_type,
1353 unsigned int duration, u64 *cookie);
1354 int ieee80211_wk_cancel_remain_on_channel(
1355 struct ieee80211_sub_if_data *sdata, u64 cookie);
1357 /* channel management */
1358 enum ieee80211_chan_mode {
1359 CHAN_MODE_UNDEFINED,
1364 enum ieee80211_chan_mode
1365 ieee80211_get_channel_mode(struct ieee80211_local *local,
1366 struct ieee80211_sub_if_data *ignore);
1367 bool ieee80211_set_channel_type(struct ieee80211_local *local,
1368 struct ieee80211_sub_if_data *sdata,
1369 enum nl80211_channel_type chantype);
1371 #ifdef CONFIG_MAC80211_NOINLINE
1372 #define debug_noinline noinline
1374 #define debug_noinline
1377 #endif /* IEEE80211_I_H */