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 <linux/idr.h>
28 #include <net/ieee80211_radiotap.h>
29 #include <net/cfg80211.h>
30 #include <net/mac80211.h>
34 struct ieee80211_local;
36 /* Maximum number of broadcast/multicast frames to buffer when some of the
37 * associated stations are using power saving. */
38 #define AP_MAX_BC_BUFFER 128
40 /* Maximum number of frames buffered to all STAs, including multicast frames.
41 * Note: increasing this limit increases the potential memory requirement. Each
42 * frame can be up to about 2 kB long. */
43 #define TOTAL_MAX_TX_BUFFER 512
45 /* Required encryption head and tailroom */
46 #define IEEE80211_ENCRYPT_HEADROOM 8
47 #define IEEE80211_ENCRYPT_TAILROOM 18
49 /* IEEE 802.11 (Ch. 9.5 Defragmentation) requires support for concurrent
50 * reception of at least three fragmented frames. This limit can be increased
51 * by changing this define, at the cost of slower frame reassembly and
52 * increased memory use (about 2 kB of RAM per entry). */
53 #define IEEE80211_FRAGMENT_MAX 4
55 #define TU_TO_EXP_TIME(x) (jiffies + usecs_to_jiffies((x) * 1024))
57 #define IEEE80211_DEFAULT_UAPSD_QUEUES \
58 (IEEE80211_WMM_IE_STA_QOSINFO_AC_BK | \
59 IEEE80211_WMM_IE_STA_QOSINFO_AC_BE | \
60 IEEE80211_WMM_IE_STA_QOSINFO_AC_VI | \
61 IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
63 #define IEEE80211_DEFAULT_MAX_SP_LEN \
64 IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL
66 struct ieee80211_fragment_entry {
67 unsigned long first_frag_time;
69 unsigned int rx_queue;
70 unsigned int last_frag;
71 unsigned int extra_len;
72 struct sk_buff_head skb_list;
73 int ccmp; /* Whether fragments were encrypted with CCMP */
74 u8 last_pn[6]; /* PN of the last fragment if CCMP was used */
78 struct ieee80211_bss {
79 /* don't want to look up all the time */
81 u8 ssid[IEEE80211_MAX_SSID_LEN];
88 unsigned long last_probe_resp;
90 #ifdef CONFIG_MAC80211_MESH
96 #define IEEE80211_MAX_SUPP_RATES 32
97 u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
98 size_t supp_rates_len;
101 * During association, we save an ERP value from a probe response so
102 * that we can feed ERP info to the driver when handling the
103 * association completes. these fields probably won't be up-to-date
104 * otherwise, you probably don't want to use them.
110 static inline u8 *bss_mesh_cfg(struct ieee80211_bss *bss)
112 #ifdef CONFIG_MAC80211_MESH
113 return bss->mesh_cfg;
118 static inline u8 *bss_mesh_id(struct ieee80211_bss *bss)
120 #ifdef CONFIG_MAC80211_MESH
126 static inline u8 bss_mesh_id_len(struct ieee80211_bss *bss)
128 #ifdef CONFIG_MAC80211_MESH
129 return bss->mesh_id_len;
135 typedef unsigned __bitwise__ ieee80211_tx_result;
136 #define TX_CONTINUE ((__force ieee80211_tx_result) 0u)
137 #define TX_DROP ((__force ieee80211_tx_result) 1u)
138 #define TX_QUEUED ((__force ieee80211_tx_result) 2u)
140 #define IEEE80211_TX_UNICAST BIT(1)
141 #define IEEE80211_TX_PS_BUFFERED BIT(2)
143 struct ieee80211_tx_data {
145 struct sk_buff_head skbs;
146 struct ieee80211_local *local;
147 struct ieee80211_sub_if_data *sdata;
148 struct sta_info *sta;
149 struct ieee80211_key *key;
151 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
189 * @IEEE80211_RX_BEACON_REPORTED: This frame was already reported
190 * to cfg80211_report_obss_beacon().
192 * These flags are used across handling multiple interfaces
193 * for a single frame.
195 enum ieee80211_rx_flags {
196 IEEE80211_RX_CMNTR = BIT(0),
197 IEEE80211_RX_BEACON_REPORTED = BIT(1),
200 struct ieee80211_rx_data {
202 struct ieee80211_local *local;
203 struct ieee80211_sub_if_data *sdata;
204 struct sta_info *sta;
205 struct ieee80211_key *key;
210 * Index into sequence numbers array, 0..16
211 * since the last (16) is used for non-QoS,
212 * will be 16 on non-QoS frames.
217 * Index into the security IV/PN arrays, 0..16
218 * since the last (16) is used for CCMP-encrypted
219 * management frames, will be set to 16 on mgmt
220 * frames and 0 on non-QoS frames.
230 int head_len, tail_len;
234 struct ieee80211_if_ap {
235 struct beacon_data __rcu *beacon;
236 struct sk_buff __rcu *probe_resp;
238 struct list_head vlans;
240 /* yes, this looks ugly, but guarantees that we can later use
242 * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
243 u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
244 struct sk_buff_head ps_bc_buf;
245 atomic_t num_sta_ps; /* number of stations in PS mode */
250 struct ieee80211_if_wds {
251 struct sta_info *sta;
252 u8 remote_addr[ETH_ALEN];
255 struct ieee80211_if_vlan {
256 struct list_head list;
258 /* used for all tx if the VLAN is configured to 4-addr mode */
259 struct sta_info __rcu *sta;
263 __u32 fwded_mcast; /* Mesh forwarded multicast frames */
264 __u32 fwded_unicast; /* Mesh forwarded unicast frames */
265 __u32 fwded_frames; /* Mesh total forwarded frames */
266 __u32 dropped_frames_ttl; /* Not transmitted since mesh_ttl == 0*/
267 __u32 dropped_frames_no_route; /* Not transmitted, no route found */
268 __u32 dropped_frames_congestion;/* Not forwarded due to congestion */
269 atomic_t estab_plinks;
272 #define PREQ_Q_F_START 0x1
273 #define PREQ_Q_F_REFRESH 0x2
274 struct mesh_preq_queue {
275 struct list_head list;
280 enum ieee80211_work_type {
281 IEEE80211_WORK_ABORT,
282 IEEE80211_WORK_DIRECT_PROBE,
284 IEEE80211_WORK_ASSOC_BEACON_WAIT,
285 IEEE80211_WORK_ASSOC,
286 IEEE80211_WORK_REMAIN_ON_CHANNEL,
287 IEEE80211_WORK_OFFCHANNEL_TX,
291 * enum work_done_result - indicates what to do after work was done
293 * @WORK_DONE_DESTROY: This work item is no longer needed, destroy.
294 * @WORK_DONE_REQUEUE: This work item was reset to be reused, and
295 * should be requeued.
297 enum work_done_result {
302 struct ieee80211_work {
303 struct list_head list;
305 struct rcu_head rcu_head;
307 struct ieee80211_sub_if_data *sdata;
309 enum work_done_result (*done)(struct ieee80211_work *wk,
310 struct sk_buff *skb);
312 struct ieee80211_channel *chan;
313 enum nl80211_channel_type chan_type;
315 unsigned long timeout;
316 enum ieee80211_work_type type;
318 u8 filter_ta[ETH_ALEN];
325 u16 algorithm, transaction;
326 u8 ssid[IEEE80211_MAX_SSID_LEN];
328 u8 key[WLAN_KEY_LEN_WEP104];
334 struct cfg80211_bss *bss;
335 const u8 *supp_rates;
336 const u8 *ht_information_ie;
337 enum ieee80211_smps_mode smps;
340 u8 prev_bssid[ETH_ALEN];
341 u8 ssid[IEEE80211_MAX_SSID_LEN];
344 bool wmm_used, use_11n, uapsd_used;
351 struct sk_buff *frame;
362 /* flags used in struct ieee80211_if_managed.flags */
363 enum ieee80211_sta_flags {
364 IEEE80211_STA_BEACON_POLL = BIT(0),
365 IEEE80211_STA_CONNECTION_POLL = BIT(1),
366 IEEE80211_STA_CONTROL_PORT = BIT(2),
367 IEEE80211_STA_DISABLE_11N = BIT(4),
368 IEEE80211_STA_CSA_RECEIVED = BIT(5),
369 IEEE80211_STA_MFP_ENABLED = BIT(6),
370 IEEE80211_STA_UAPSD_ENABLED = BIT(7),
371 IEEE80211_STA_NULLFUNC_ACKED = BIT(8),
372 IEEE80211_STA_RESET_SIGNAL_AVE = BIT(9),
375 struct ieee80211_if_managed {
376 struct timer_list timer;
377 struct timer_list conn_mon_timer;
378 struct timer_list bcn_mon_timer;
379 struct timer_list chswitch_timer;
380 struct work_struct monitor_work;
381 struct work_struct chswitch_work;
382 struct work_struct beacon_connection_loss_work;
384 unsigned long beacon_timeout;
385 unsigned long probe_timeout;
386 int probe_send_count;
387 bool nullfunc_failed;
390 struct cfg80211_bss *associated;
396 unsigned long timers_running; /* used for quiesce/restart */
397 bool powersave; /* powersave requested for this iface */
398 bool broken_ap; /* AP is broken -- turn off powersave */
399 enum ieee80211_smps_mode req_smps, /* requested smps mode */
400 ap_smps, /* smps mode AP thinks we're in */
401 driver_smps_mode; /* smps mode request */
403 struct work_struct request_smps_work;
407 bool beacon_crc_valid;
411 IEEE80211_MFP_DISABLED,
412 IEEE80211_MFP_OPTIONAL,
413 IEEE80211_MFP_REQUIRED
414 } mfp; /* management frame protection */
416 int wmm_last_param_set;
420 /* Signal strength from the last Beacon frame in the current BSS. */
421 int last_beacon_signal;
424 * Weighted average of the signal strength from Beacon frames in the
425 * current BSS. This is in units of 1/16 of the signal unit to maintain
426 * accuracy and to speed up calculations, i.e., the value need to be
427 * divided by 16 to get the actual value.
429 int ave_beacon_signal;
432 * Number of Beacon frames used in ave_beacon_signal. This can be used
433 * to avoid generating less reliable cqm events that would be based
434 * only on couple of received frames.
436 unsigned int count_beacon_signal;
439 * Last Beacon frame signal strength average (ave_beacon_signal / 16)
440 * that triggered a cqm event. 0 indicates that no event has been
441 * generated for the current association.
443 int last_cqm_event_signal;
446 * State variables for keeping track of RSSI of the AP currently
447 * connected to and informing driver when RSSI has gone
448 * below/above a certain threshold.
450 int rssi_min_thold, rssi_max_thold;
451 int last_ave_beacon_signal;
454 struct ieee80211_if_ibss {
455 struct timer_list timer;
459 unsigned long last_scan_completed;
470 u8 ssid[IEEE80211_MAX_SSID_LEN];
473 struct ieee80211_channel *channel;
475 unsigned long ibss_join_req;
476 /* probe response/beacon for IBSS */
477 struct sk_buff __rcu *presp;
481 IEEE80211_IBSS_MLME_SEARCH,
482 IEEE80211_IBSS_MLME_JOINED,
486 struct ieee80211_if_mesh {
487 struct timer_list housekeeping_timer;
488 struct timer_list mesh_path_timer;
489 struct timer_list mesh_path_root_timer;
491 unsigned long timers_running;
493 unsigned long wrkq_flags;
495 u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
497 /* Active Path Selection Protocol Identifier */
499 /* Active Path Selection Metric Identifier */
501 /* Congestion Control Mode Identifier */
503 /* Synchronization Protocol Identifier */
505 /* Authentication Protocol Identifier */
507 /* Local mesh Sequence Number */
509 /* Last used PREQ ID */
512 /* Timestamp of last SN update */
513 unsigned long last_sn_update;
514 /* Timestamp of last SN sent */
515 unsigned long last_preq;
516 struct mesh_rmc *rmc;
517 spinlock_t mesh_preq_queue_lock;
518 struct mesh_preq_queue preq_queue;
520 struct mesh_stats mshstats;
521 struct mesh_config mshcfg;
523 bool accepting_plinks;
528 IEEE80211_MESH_SEC_NONE = 0x0,
529 IEEE80211_MESH_SEC_AUTHED = 0x1,
530 IEEE80211_MESH_SEC_SECURED = 0x2,
534 #ifdef CONFIG_MAC80211_MESH
535 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
536 do { (msh)->mshstats.name++; } while (0)
538 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
543 * enum ieee80211_sub_if_data_flags - virtual interface flags
545 * @IEEE80211_SDATA_ALLMULTI: interface wants all multicast packets
546 * @IEEE80211_SDATA_PROMISC: interface is promisc
547 * @IEEE80211_SDATA_OPERATING_GMODE: operating in G-only mode
548 * @IEEE80211_SDATA_DONT_BRIDGE_PACKETS: bridge packets between
549 * associated stations and deliver multicast frames both
550 * back to wireless media and to the local net stack.
551 * @IEEE80211_SDATA_DISCONNECT_RESUME: Disconnect after resume.
552 * @IEEE80211_SDATA_IN_DRIVER: indicates interface was added to driver
554 enum ieee80211_sub_if_data_flags {
555 IEEE80211_SDATA_ALLMULTI = BIT(0),
556 IEEE80211_SDATA_PROMISC = BIT(1),
557 IEEE80211_SDATA_OPERATING_GMODE = BIT(2),
558 IEEE80211_SDATA_DONT_BRIDGE_PACKETS = BIT(3),
559 IEEE80211_SDATA_DISCONNECT_RESUME = BIT(4),
560 IEEE80211_SDATA_IN_DRIVER = BIT(5),
564 * enum ieee80211_sdata_state_bits - virtual interface state bits
565 * @SDATA_STATE_RUNNING: virtual interface is up & running; this
566 * mirrors netif_running() but is separate for interface type
567 * change handling while the interface is up
568 * @SDATA_STATE_OFFCHANNEL: This interface is currently in offchannel
569 * mode, so queues are stopped
571 enum ieee80211_sdata_state_bits {
573 SDATA_STATE_OFFCHANNEL,
576 struct ieee80211_sub_if_data {
577 struct list_head list;
579 struct wireless_dev wdev;
582 struct list_head key_list;
584 /* count for keys needing tailroom space allocation */
585 int crypto_tx_tailroom_needed_cnt;
587 struct net_device *dev;
588 struct ieee80211_local *local;
594 int drop_unencrypted;
599 * keep track of whether the HT opmode (stored in
600 * vif.bss_info.ht_operation_mode) is valid.
602 bool ht_opmode_valid;
604 /* to detect idle changes */
607 /* Fragment table for host-based reassembly */
608 struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
609 unsigned int fragment_next;
611 struct ieee80211_key __rcu *keys[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
612 struct ieee80211_key __rcu *default_unicast_key;
613 struct ieee80211_key __rcu *default_multicast_key;
614 struct ieee80211_key __rcu *default_mgmt_key;
617 __be16 control_port_protocol;
618 bool control_port_no_encrypt;
620 struct ieee80211_tx_queue_params tx_conf[IEEE80211_MAX_QUEUES];
622 struct work_struct work;
623 struct sk_buff_head skb_queue;
625 bool arp_filter_state;
628 * AP this belongs to: self in AP mode and
629 * corresponding AP in VLAN mode, NULL for
630 * all others (might be needed later in IBSS)
632 struct ieee80211_if_ap *bss;
634 /* bitmap of allowed (non-MCS) rate indexes for rate control */
635 u32 rc_rateidx_mask[IEEE80211_NUM_BANDS];
638 struct ieee80211_if_ap ap;
639 struct ieee80211_if_wds wds;
640 struct ieee80211_if_vlan vlan;
641 struct ieee80211_if_managed mgd;
642 struct ieee80211_if_ibss ibss;
643 struct ieee80211_if_mesh mesh;
647 #ifdef CONFIG_MAC80211_DEBUGFS
650 struct dentry *subdir_stations;
651 struct dentry *default_unicast_key;
652 struct dentry *default_multicast_key;
653 struct dentry *default_mgmt_key;
656 /* must be last, dynamically sized area in this! */
657 struct ieee80211_vif vif;
661 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
663 return container_of(p, struct ieee80211_sub_if_data, vif);
666 enum sdata_queue_type {
667 IEEE80211_SDATA_QUEUE_TYPE_FRAME = 0,
668 IEEE80211_SDATA_QUEUE_AGG_START = 1,
669 IEEE80211_SDATA_QUEUE_AGG_STOP = 2,
673 IEEE80211_RX_MSG = 1,
674 IEEE80211_TX_STATUS_MSG = 2,
675 IEEE80211_EOSP_MSG = 3,
678 struct skb_eosp_msg_data {
679 u8 sta[ETH_ALEN], iface[ETH_ALEN];
682 enum queue_stop_reason {
683 IEEE80211_QUEUE_STOP_REASON_DRIVER,
684 IEEE80211_QUEUE_STOP_REASON_PS,
685 IEEE80211_QUEUE_STOP_REASON_CSA,
686 IEEE80211_QUEUE_STOP_REASON_AGGREGATION,
687 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
688 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
689 IEEE80211_QUEUE_STOP_REASON_CHTYPE_CHANGE,
692 #ifdef CONFIG_MAC80211_LEDS
693 struct tpt_led_trigger {
694 struct led_trigger trig;
696 const struct ieee80211_tpt_blink *blink_table;
697 unsigned int blink_table_len;
698 struct timer_list timer;
699 unsigned long prev_traffic;
700 unsigned long tx_bytes, rx_bytes;
701 unsigned int active, want;
707 * mac80211 scan flags - currently active scan mode
709 * @SCAN_SW_SCANNING: We're currently in the process of scanning but may as
710 * well be on the operating channel
711 * @SCAN_HW_SCANNING: The hardware is scanning for us, we have no way to
712 * determine if we are on the operating channel or not
713 * @SCAN_COMPLETED: Set for our scan work function when the driver reported
714 * that the scan completed.
715 * @SCAN_ABORTED: Set for our scan work function when the driver reported
716 * a scan complete for an aborted scan.
726 * enum mac80211_scan_state - scan state machine states
728 * @SCAN_DECISION: Main entry point to the scan state machine, this state
729 * determines if we should keep on scanning or switch back to the
731 * @SCAN_SET_CHANNEL: Set the next channel to be scanned
732 * @SCAN_SEND_PROBE: Send probe requests and wait for probe responses
733 * @SCAN_SUSPEND: Suspend the scan and go back to operating channel to
735 * @SCAN_RESUME: Resume the scan and scan the next channel
737 enum mac80211_scan_state {
745 struct ieee80211_local {
746 /* embed the driver visible part.
747 * don't cast (use the static inlines below), but we keep
748 * it first anyway so they become a no-op */
749 struct ieee80211_hw hw;
751 const struct ieee80211_ops *ops;
754 * work stuff, potentially off-channel (in the future)
756 struct list_head work_list;
757 struct timer_list work_timer;
758 struct work_struct work_work;
759 struct sk_buff_head work_skb_queue;
762 * private workqueue to mac80211. mac80211 makes this accessible
763 * via ieee80211_queue_work()
765 struct workqueue_struct *workqueue;
767 unsigned long queue_stop_reasons[IEEE80211_MAX_QUEUES];
768 /* also used to protect ampdu_ac_queue and amdpu_ac_stop_refcnt */
769 spinlock_t queue_stop_reason_lock;
772 int monitors, cooked_mntrs;
773 /* number of interfaces with corresponding FIF_ flags */
774 int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss, fif_pspoll,
777 unsigned int filter_flags; /* FIF_* */
779 bool wiphy_ciphers_allocated;
781 /* protects the aggregated multicast list and filter calls */
782 spinlock_t filter_lock;
784 /* used for uploading changed mc list */
785 struct work_struct reconfig_filter;
787 /* used to reconfigure hardware SM PS */
788 struct work_struct recalc_smps;
790 /* aggregated multicast list */
791 struct netdev_hw_addr_list mc_list;
793 bool tim_in_locked_section; /* see ieee80211_beacon_get() */
796 * suspended is true if we finished all the suspend _and_ we have
797 * not yet come up from resume. This is to be used by mac80211
798 * to ensure driver sanity during suspend and mac80211's own
799 * sanity. It can eventually be used for WoW as well.
804 * Resuming is true while suspended, but when we're reprogramming the
805 * hardware -- at that time it's allowed to use ieee80211_queue_work()
806 * again even though some other parts of the stack are still suspended
807 * and we still drop received frames to avoid waking the stack.
812 * quiescing is true during the suspend process _only_ to
813 * ease timer cancelling etc.
817 /* device is started */
820 /* wowlan is enabled -- don't reconfig on resume */
823 int tx_headroom; /* required headroom for hardware/radiotap */
825 /* Tasklet and skb queue to process calls from IRQ mode. All frames
826 * added to skb_queue will be processed, but frames in
827 * skb_queue_unreliable may be dropped if the total length of these
828 * queues increases over the limit. */
829 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
830 struct tasklet_struct tasklet;
831 struct sk_buff_head skb_queue;
832 struct sk_buff_head skb_queue_unreliable;
835 * Internal FIFO queue which is shared between multiple rx path
836 * stages. Its main task is to provide a serialization mechanism,
837 * so all rx handlers can enjoy having exclusive access to their
838 * private data structures.
840 struct sk_buff_head rx_skb_queue;
841 bool running_rx_handler; /* protected by rx_skb_queue.lock */
845 * The mutex only protects the list and counter,
846 * reads are done in RCU.
847 * Additionally, the lock protects the hash table,
848 * the pending list and each BSS's TIM bitmap.
850 struct mutex sta_mtx;
852 unsigned long num_sta;
853 struct list_head sta_list, sta_pending_list;
854 struct sta_info __rcu *sta_hash[STA_HASH_SIZE];
855 struct timer_list sta_cleanup;
856 struct work_struct sta_finish_work;
859 struct sk_buff_head pending[IEEE80211_MAX_QUEUES];
860 struct tasklet_struct tx_pending_tasklet;
862 atomic_t agg_queue_stop[IEEE80211_MAX_QUEUES];
864 /* number of interfaces with corresponding IFF_ flags */
865 atomic_t iff_allmultis, iff_promiscs;
867 struct rate_control_ref *rate_ctrl;
869 struct crypto_cipher *wep_tx_tfm;
870 struct crypto_cipher *wep_rx_tfm;
874 struct list_head interfaces;
875 struct mutex iflist_mtx;
878 * Key mutex, protects sdata's key_list and sta_info's
879 * key pointers (write access, they're RCU.)
881 struct mutex key_mtx;
883 /* mutex for scan and work locking */
886 /* Scanning and BSS list */
887 unsigned long scanning;
888 struct cfg80211_ssid scan_ssid;
889 struct cfg80211_scan_request *int_scan_req;
890 struct cfg80211_scan_request *scan_req, *hw_scan_req;
891 struct ieee80211_channel *scan_channel;
892 enum ieee80211_band hw_scan_band;
893 int scan_channel_idx;
897 struct ieee80211_sched_scan_ies sched_scan_ies;
898 struct work_struct sched_scan_stopped_work;
900 unsigned long leave_oper_channel_time;
901 enum mac80211_scan_state next_scan_state;
902 struct delayed_work scan_work;
903 struct ieee80211_sub_if_data *scan_sdata;
904 enum nl80211_channel_type _oper_channel_type;
905 struct ieee80211_channel *oper_channel, *csa_channel;
907 /* Temporary remain-on-channel for off-channel operations */
908 struct ieee80211_channel *tmp_channel;
909 enum nl80211_channel_type tmp_channel_type;
912 /* dot11CountersTable */
913 u32 dot11TransmittedFragmentCount;
914 u32 dot11MulticastTransmittedFrameCount;
915 u32 dot11FailedCount;
917 u32 dot11MultipleRetryCount;
918 u32 dot11FrameDuplicateCount;
919 u32 dot11ReceivedFragmentCount;
920 u32 dot11MulticastReceivedFrameCount;
921 u32 dot11TransmittedFrameCount;
923 #ifdef CONFIG_MAC80211_LEDS
924 int tx_led_counter, rx_led_counter;
925 struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led;
926 struct tpt_led_trigger *tpt_led_trigger;
927 char tx_led_name[32], rx_led_name[32],
928 assoc_led_name[32], radio_led_name[32];
931 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
932 /* TX/RX handler statistics */
933 unsigned int tx_handlers_drop;
934 unsigned int tx_handlers_queued;
935 unsigned int tx_handlers_drop_unencrypted;
936 unsigned int tx_handlers_drop_fragment;
937 unsigned int tx_handlers_drop_wep;
938 unsigned int tx_handlers_drop_not_assoc;
939 unsigned int tx_handlers_drop_unauth_port;
940 unsigned int rx_handlers_drop;
941 unsigned int rx_handlers_queued;
942 unsigned int rx_handlers_drop_nullfunc;
943 unsigned int rx_handlers_drop_defrag;
944 unsigned int rx_handlers_drop_short;
945 unsigned int rx_handlers_drop_passive_scan;
946 unsigned int tx_expand_skb_head;
947 unsigned int tx_expand_skb_head_cloned;
948 unsigned int rx_expand_skb_head;
949 unsigned int rx_expand_skb_head2;
950 unsigned int rx_handlers_fragments;
951 unsigned int tx_status_drop;
952 #define I802_DEBUG_INC(c) (c)++
953 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
954 #define I802_DEBUG_INC(c) do { } while (0)
955 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
958 int total_ps_buffered; /* total number of all buffered unicast and
959 * multicast packets for power saving stations
961 int wifi_wme_noack_test;
962 unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */
965 * Bitmask of enabled u-apsd queues,
966 * IEEE80211_WMM_IE_STA_QOSINFO_AC_BE & co. Needs a new association
969 unsigned int uapsd_queues;
972 * Maximum number of buffered frames AP can deliver during a
973 * service period, IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL or similar.
974 * Needs a new association to take effect.
976 unsigned int uapsd_max_sp_len;
979 bool offchannel_ps_enabled;
981 * PS can only be enabled when we have exactly one managed
982 * interface (and monitors) in PS, this then points there.
984 struct ieee80211_sub_if_data *ps_sdata;
985 struct work_struct dynamic_ps_enable_work;
986 struct work_struct dynamic_ps_disable_work;
987 struct timer_list dynamic_ps_timer;
988 struct notifier_block network_latency_notifier;
989 struct notifier_block ifa_notifier;
992 * The dynamic ps timeout configured from user space via WEXT -
993 * this will override whatever chosen by mac80211 internally.
995 int dynamic_ps_forced_timeout;
996 int dynamic_ps_user_timeout;
997 bool disable_dynamic_ps;
999 int user_power_level; /* in dBm */
1000 int power_constr_level; /* in dBm */
1002 enum ieee80211_smps_mode smps_mode;
1004 struct work_struct restart_work;
1006 #ifdef CONFIG_MAC80211_DEBUGFS
1007 struct local_debugfsdentries {
1008 struct dentry *rcdir;
1009 struct dentry *keys;
1013 struct ieee80211_channel *hw_roc_channel;
1014 struct net_device *hw_roc_dev;
1015 struct sk_buff *hw_roc_skb, *hw_roc_skb_for_status;
1016 struct work_struct hw_roc_start, hw_roc_done;
1017 enum nl80211_channel_type hw_roc_channel_type;
1018 unsigned int hw_roc_duration;
1022 struct idr ack_status_frames;
1023 spinlock_t ack_status_lock;
1025 /* dummy netdev for use w/ NAPI */
1026 struct net_device napi_dev;
1028 struct napi_struct napi;
1031 static inline struct ieee80211_sub_if_data *
1032 IEEE80211_DEV_TO_SUB_IF(struct net_device *dev)
1034 return netdev_priv(dev);
1037 /* this struct represents 802.11n's RA/TID combination */
1038 struct ieee80211_ra_tid {
1043 static inline struct ieee80211_local *hw_to_local(
1044 struct ieee80211_hw *hw)
1046 return container_of(hw, struct ieee80211_local, hw);
1049 static inline struct ieee80211_hw *local_to_hw(
1050 struct ieee80211_local *local)
1056 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
1058 return compare_ether_addr(raddr, addr) == 0 ||
1059 is_broadcast_ether_addr(raddr);
1063 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed);
1064 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
1065 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
1067 void ieee80211_configure_filter(struct ieee80211_local *local);
1068 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
1071 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata);
1072 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
1073 struct cfg80211_auth_request *req);
1074 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
1075 struct cfg80211_assoc_request *req);
1076 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
1077 struct cfg80211_deauth_request *req,
1079 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
1080 struct cfg80211_disassoc_request *req,
1082 void ieee80211_send_pspoll(struct ieee80211_local *local,
1083 struct ieee80211_sub_if_data *sdata);
1084 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency);
1085 int ieee80211_max_network_latency(struct notifier_block *nb,
1086 unsigned long data, void *dummy);
1087 int ieee80211_set_arp_filter(struct ieee80211_sub_if_data *sdata);
1088 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1089 struct ieee80211_channel_sw_ie *sw_elem,
1090 struct ieee80211_bss *bss,
1092 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata);
1093 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata);
1094 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata);
1095 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1096 struct sk_buff *skb);
1097 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata);
1098 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata);
1101 void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local);
1102 void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata);
1103 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
1104 u8 *bssid, u8 *addr, u32 supp_rates,
1106 int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
1107 struct cfg80211_ibss_params *params);
1108 int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata);
1109 void ieee80211_ibss_quiesce(struct ieee80211_sub_if_data *sdata);
1110 void ieee80211_ibss_restart(struct ieee80211_sub_if_data *sdata);
1111 void ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata);
1112 void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1113 struct sk_buff *skb);
1116 void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata);
1117 void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1118 struct sk_buff *skb);
1120 /* scan/BSS handling */
1121 void ieee80211_scan_work(struct work_struct *work);
1122 int ieee80211_request_internal_scan(struct ieee80211_sub_if_data *sdata,
1123 const u8 *ssid, u8 ssid_len,
1124 struct ieee80211_channel *chan);
1125 int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
1126 struct cfg80211_scan_request *req);
1127 void ieee80211_scan_cancel(struct ieee80211_local *local);
1129 ieee80211_scan_rx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
1131 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local);
1132 struct ieee80211_bss *
1133 ieee80211_bss_info_update(struct ieee80211_local *local,
1134 struct ieee80211_rx_status *rx_status,
1135 struct ieee80211_mgmt *mgmt,
1137 struct ieee802_11_elems *elems,
1138 struct ieee80211_channel *channel,
1140 struct ieee80211_bss *
1141 ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq,
1142 u8 *ssid, u8 ssid_len);
1143 void ieee80211_rx_bss_put(struct ieee80211_local *local,
1144 struct ieee80211_bss *bss);
1146 /* scheduled scan handling */
1147 int ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata,
1148 struct cfg80211_sched_scan_request *req);
1149 int ieee80211_request_sched_scan_stop(struct ieee80211_sub_if_data *sdata);
1150 void ieee80211_sched_scan_stopped_work(struct work_struct *work);
1152 /* off-channel helpers */
1153 bool ieee80211_cfg_on_oper_channel(struct ieee80211_local *local);
1154 void ieee80211_offchannel_enable_all_ps(struct ieee80211_local *local,
1156 void ieee80211_offchannel_stop_vifs(struct ieee80211_local *local,
1157 bool offchannel_ps_enable);
1158 void ieee80211_offchannel_return(struct ieee80211_local *local,
1159 bool enable_beaconing,
1160 bool offchannel_ps_disable);
1161 void ieee80211_hw_roc_setup(struct ieee80211_local *local);
1163 /* interface handling */
1164 int ieee80211_iface_init(void);
1165 void ieee80211_iface_exit(void);
1166 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1167 struct net_device **new_dev, enum nl80211_iftype type,
1168 struct vif_params *params);
1169 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1170 enum nl80211_iftype type);
1171 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata);
1172 void ieee80211_remove_interfaces(struct ieee80211_local *local);
1173 u32 __ieee80211_recalc_idle(struct ieee80211_local *local);
1174 void ieee80211_recalc_idle(struct ieee80211_local *local);
1175 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
1178 static inline bool ieee80211_sdata_running(struct ieee80211_sub_if_data *sdata)
1180 return test_bit(SDATA_STATE_RUNNING, &sdata->state);
1184 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
1185 void ieee80211_tx_pending(unsigned long data);
1186 netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
1187 struct net_device *dev);
1188 netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
1189 struct net_device *dev);
1192 void ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_supported_band *sband,
1193 struct ieee80211_ht_cap *ht_cap_ie,
1194 struct ieee80211_sta_ht_cap *ht_cap);
1195 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
1196 const u8 *da, u16 tid,
1197 u16 initiator, u16 reason_code);
1198 int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata,
1199 enum ieee80211_smps_mode smps, const u8 *da,
1201 void ieee80211_request_smps_work(struct work_struct *work);
1203 void ___ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1204 u16 initiator, u16 reason, bool stop);
1205 void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1206 u16 initiator, u16 reason, bool stop);
1207 void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta, bool tx);
1208 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
1209 struct sta_info *sta,
1210 struct ieee80211_mgmt *mgmt, size_t len);
1211 void ieee80211_process_addba_resp(struct ieee80211_local *local,
1212 struct sta_info *sta,
1213 struct ieee80211_mgmt *mgmt,
1215 void ieee80211_process_addba_request(struct ieee80211_local *local,
1216 struct sta_info *sta,
1217 struct ieee80211_mgmt *mgmt,
1220 int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1221 enum ieee80211_back_parties initiator,
1223 int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1224 enum ieee80211_back_parties initiator,
1226 void ieee80211_start_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u16 tid);
1227 void ieee80211_stop_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u8 tid);
1228 void ieee80211_ba_session_work(struct work_struct *work);
1229 void ieee80211_tx_ba_session_handle_start(struct sta_info *sta, int tid);
1230 void ieee80211_release_reorder_timeout(struct sta_info *sta, int tid);
1232 /* Spectrum management */
1233 void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata,
1234 struct ieee80211_mgmt *mgmt,
1237 /* Suspend/resume and hw reconfiguration */
1238 int ieee80211_reconfig(struct ieee80211_local *local);
1239 void ieee80211_stop_device(struct ieee80211_local *local);
1242 int __ieee80211_suspend(struct ieee80211_hw *hw,
1243 struct cfg80211_wowlan *wowlan);
1245 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
1247 struct ieee80211_local *local = hw_to_local(hw);
1249 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
1250 "%s: resume with hardware scan still in progress\n",
1251 wiphy_name(hw->wiphy));
1253 return ieee80211_reconfig(hw_to_local(hw));
1256 static inline int __ieee80211_suspend(struct ieee80211_hw *hw,
1257 struct cfg80211_wowlan *wowlan)
1262 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
1268 /* utility functions/constants */
1269 extern void *mac80211_wiphy_privid; /* for wiphy privid */
1270 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
1271 enum nl80211_iftype type);
1272 int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
1273 int rate, int erp, int short_preamble);
1274 void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx,
1275 struct ieee80211_hdr *hdr, const u8 *tsc,
1277 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata);
1278 void ieee80211_xmit(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
1279 void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
1280 void ieee802_11_parse_elems(u8 *start, size_t len,
1281 struct ieee802_11_elems *elems);
1282 u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
1283 struct ieee802_11_elems *elems,
1284 u64 filter, u32 crc);
1285 u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
1286 enum ieee80211_band band);
1288 void ieee80211_dynamic_ps_enable_work(struct work_struct *work);
1289 void ieee80211_dynamic_ps_disable_work(struct work_struct *work);
1290 void ieee80211_dynamic_ps_timer(unsigned long data);
1291 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1292 struct ieee80211_sub_if_data *sdata,
1294 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1295 struct ieee80211_hdr *hdr);
1296 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1297 struct ieee80211_hdr *hdr, bool ack);
1298 void ieee80211_beacon_connection_loss_work(struct work_struct *work);
1300 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
1301 enum queue_stop_reason reason);
1302 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
1303 enum queue_stop_reason reason);
1304 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
1305 enum queue_stop_reason reason);
1306 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
1307 enum queue_stop_reason reason);
1308 void ieee80211_add_pending_skb(struct ieee80211_local *local,
1309 struct sk_buff *skb);
1310 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
1311 struct sk_buff_head *skbs);
1312 void ieee80211_add_pending_skbs_fn(struct ieee80211_local *local,
1313 struct sk_buff_head *skbs,
1314 void (*fn)(void *data), void *data);
1316 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1317 u16 transaction, u16 auth_alg,
1318 u8 *extra, size_t extra_len, const u8 *bssid,
1319 const u8 *key, u8 key_len, u8 key_idx);
1320 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1321 const u8 *ie, size_t ie_len,
1322 enum ieee80211_band band, u32 rate_mask,
1324 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1325 u8 *dst, u32 ratemask,
1326 const u8 *ssid, size_t ssid_len,
1327 const u8 *ie, size_t ie_len,
1329 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1330 const u8 *ssid, size_t ssid_len,
1331 const u8 *ie, size_t ie_len,
1332 u32 ratemask, bool directed, bool no_cck);
1334 void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
1335 const size_t supp_rates_len,
1336 const u8 *supp_rates);
1337 u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
1338 struct ieee802_11_elems *elems,
1339 enum ieee80211_band band);
1340 int __ieee80211_request_smps(struct ieee80211_sub_if_data *sdata,
1341 enum ieee80211_smps_mode smps_mode);
1342 void ieee80211_recalc_smps(struct ieee80211_local *local);
1344 size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
1345 const u8 *ids, int n_ids, size_t offset);
1346 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset);
1347 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_supported_band *sband,
1349 u8 *ieee80211_ie_build_ht_info(u8 *pos,
1350 struct ieee80211_sta_ht_cap *ht_cap,
1351 struct ieee80211_channel *channel,
1352 enum nl80211_channel_type channel_type);
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);
1381 enum nl80211_channel_type
1382 ieee80211_ht_info_to_channel_type(struct ieee80211_ht_info *ht_info);
1384 #ifdef CONFIG_MAC80211_NOINLINE
1385 #define debug_noinline noinline
1387 #define debug_noinline
1390 #endif /* IEEE80211_I_H */