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 <net/ieee80211_radiotap.h>
27 #include <net/cfg80211.h>
28 #include <net/mac80211.h>
32 struct ieee80211_local;
34 /* Maximum number of broadcast/multicast frames to buffer when some of the
35 * associated stations are using power saving. */
36 #define AP_MAX_BC_BUFFER 128
38 /* Maximum number of frames buffered to all STAs, including multicast frames.
39 * Note: increasing this limit increases the potential memory requirement. Each
40 * frame can be up to about 2 kB long. */
41 #define TOTAL_MAX_TX_BUFFER 512
43 /* Required encryption head and tailroom */
44 #define IEEE80211_ENCRYPT_HEADROOM 8
45 #define IEEE80211_ENCRYPT_TAILROOM 18
47 /* IEEE 802.11 (Ch. 9.5 Defragmentation) requires support for concurrent
48 * reception of at least three fragmented frames. This limit can be increased
49 * by changing this define, at the cost of slower frame reassembly and
50 * increased memory use (about 2 kB of RAM per entry). */
51 #define IEEE80211_FRAGMENT_MAX 4
54 * Time after which we ignore scan results and no longer report/use
57 #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
59 #define TU_TO_EXP_TIME(x) (jiffies + usecs_to_jiffies((x) * 1024))
61 #define IEEE80211_DEFAULT_UAPSD_QUEUES \
62 (IEEE80211_WMM_IE_STA_QOSINFO_AC_BK | \
63 IEEE80211_WMM_IE_STA_QOSINFO_AC_BE | \
64 IEEE80211_WMM_IE_STA_QOSINFO_AC_VI | \
65 IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
67 #define IEEE80211_DEFAULT_MAX_SP_LEN \
68 IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL
70 struct ieee80211_fragment_entry {
71 unsigned long first_frag_time;
73 unsigned int rx_queue;
74 unsigned int last_frag;
75 unsigned int extra_len;
76 struct sk_buff_head skb_list;
77 int ccmp; /* Whether fragments were encrypted with CCMP */
78 u8 last_pn[6]; /* PN of the last fragment if CCMP was used */
82 struct ieee80211_bss {
83 /* don't want to look up all the time */
85 u8 ssid[IEEE80211_MAX_SSID_LEN];
92 unsigned long last_probe_resp;
94 #ifdef CONFIG_MAC80211_MESH
100 #define IEEE80211_MAX_SUPP_RATES 32
101 u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
102 size_t supp_rates_len;
105 * During assocation, we save an ERP value from a probe response so
106 * that we can feed ERP info to the driver when handling the
107 * association completes. these fields probably won't be up-to-date
108 * otherwise, you probably don't want to use them.
114 static inline u8 *bss_mesh_cfg(struct ieee80211_bss *bss)
116 #ifdef CONFIG_MAC80211_MESH
117 return bss->mesh_cfg;
122 static inline u8 *bss_mesh_id(struct ieee80211_bss *bss)
124 #ifdef CONFIG_MAC80211_MESH
130 static inline u8 bss_mesh_id_len(struct ieee80211_bss *bss)
132 #ifdef CONFIG_MAC80211_MESH
133 return bss->mesh_id_len;
139 typedef unsigned __bitwise__ ieee80211_tx_result;
140 #define TX_CONTINUE ((__force ieee80211_tx_result) 0u)
141 #define TX_DROP ((__force ieee80211_tx_result) 1u)
142 #define TX_QUEUED ((__force ieee80211_tx_result) 2u)
144 #define IEEE80211_TX_FRAGMENTED BIT(0)
145 #define IEEE80211_TX_UNICAST BIT(1)
146 #define IEEE80211_TX_PS_BUFFERED BIT(2)
148 struct ieee80211_tx_data {
150 struct ieee80211_local *local;
151 struct ieee80211_sub_if_data *sdata;
152 struct sta_info *sta;
153 struct ieee80211_key *key;
155 struct ieee80211_channel *channel;
162 typedef unsigned __bitwise__ ieee80211_rx_result;
163 #define RX_CONTINUE ((__force ieee80211_rx_result) 0u)
164 #define RX_DROP_UNUSABLE ((__force ieee80211_rx_result) 1u)
165 #define RX_DROP_MONITOR ((__force ieee80211_rx_result) 2u)
166 #define RX_QUEUED ((__force ieee80211_rx_result) 3u)
168 #define IEEE80211_RX_IN_SCAN BIT(0)
169 /* frame is destined to interface currently processed (incl. multicast frames) */
170 #define IEEE80211_RX_RA_MATCH BIT(1)
171 #define IEEE80211_RX_AMSDU BIT(2)
172 #define IEEE80211_RX_FRAGMENTED BIT(3)
173 /* only add flags here that do not change with subframes of an aMPDU */
175 struct ieee80211_rx_data {
177 struct ieee80211_local *local;
178 struct ieee80211_sub_if_data *sdata;
179 struct sta_info *sta;
180 struct ieee80211_key *key;
190 int head_len, tail_len;
194 struct ieee80211_if_ap {
195 struct beacon_data *beacon;
197 struct list_head vlans;
199 /* yes, this looks ugly, but guarantees that we can later use
201 * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
202 u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
203 struct sk_buff_head ps_bc_buf;
204 atomic_t num_sta_ps; /* number of stations in PS mode */
208 struct ieee80211_if_wds {
209 struct sta_info *sta;
210 u8 remote_addr[ETH_ALEN];
213 struct ieee80211_if_vlan {
214 struct list_head list;
216 /* used for all tx if the VLAN is configured to 4-addr mode */
217 struct sta_info *sta;
221 __u32 fwded_mcast; /* Mesh forwarded multicast frames */
222 __u32 fwded_unicast; /* Mesh forwarded unicast frames */
223 __u32 fwded_frames; /* Mesh total forwarded frames */
224 __u32 dropped_frames_ttl; /* Not transmitted since mesh_ttl == 0*/
225 __u32 dropped_frames_no_route; /* Not transmitted, no route found */
226 atomic_t estab_plinks;
229 #define PREQ_Q_F_START 0x1
230 #define PREQ_Q_F_REFRESH 0x2
231 struct mesh_preq_queue {
232 struct list_head list;
237 enum ieee80211_work_type {
238 IEEE80211_WORK_ABORT,
239 IEEE80211_WORK_DIRECT_PROBE,
241 IEEE80211_WORK_ASSOC,
242 IEEE80211_WORK_REMAIN_ON_CHANNEL,
246 * enum work_done_result - indicates what to do after work was done
248 * @WORK_DONE_DESTROY: This work item is no longer needed, destroy.
249 * @WORK_DONE_REQUEUE: This work item was reset to be reused, and
250 * should be requeued.
252 enum work_done_result {
257 struct ieee80211_work {
258 struct list_head list;
260 struct rcu_head rcu_head;
262 struct ieee80211_sub_if_data *sdata;
264 enum work_done_result (*done)(struct ieee80211_work *wk,
265 struct sk_buff *skb);
267 struct ieee80211_channel *chan;
268 enum nl80211_channel_type chan_type;
270 unsigned long timeout;
271 enum ieee80211_work_type type;
273 u8 filter_ta[ETH_ALEN];
280 u16 algorithm, transaction;
281 u8 ssid[IEEE80211_MAX_SSID_LEN];
283 u8 key[WLAN_KEY_LEN_WEP104];
288 struct cfg80211_bss *bss;
289 const u8 *supp_rates;
290 const u8 *ht_information_ie;
291 enum ieee80211_smps_mode smps;
294 u8 prev_bssid[ETH_ALEN];
295 u8 ssid[IEEE80211_MAX_SSID_LEN];
298 bool wmm_used, use_11n, uapsd_used;
310 /* flags used in struct ieee80211_if_managed.flags */
311 enum ieee80211_sta_flags {
312 IEEE80211_STA_BEACON_POLL = BIT(0),
313 IEEE80211_STA_CONNECTION_POLL = BIT(1),
314 IEEE80211_STA_CONTROL_PORT = BIT(2),
315 IEEE80211_STA_DISABLE_11N = BIT(4),
316 IEEE80211_STA_CSA_RECEIVED = BIT(5),
317 IEEE80211_STA_MFP_ENABLED = BIT(6),
318 IEEE80211_STA_UAPSD_ENABLED = BIT(7),
319 IEEE80211_STA_NULLFUNC_ACKED = BIT(8),
320 IEEE80211_STA_RESET_SIGNAL_AVE = BIT(9),
323 struct ieee80211_if_managed {
324 struct timer_list timer;
325 struct timer_list conn_mon_timer;
326 struct timer_list bcn_mon_timer;
327 struct timer_list chswitch_timer;
328 struct work_struct work;
329 struct work_struct monitor_work;
330 struct work_struct chswitch_work;
331 struct work_struct beacon_connection_loss_work;
333 unsigned long probe_timeout;
334 int probe_send_count;
337 struct cfg80211_bss *associated;
343 unsigned long timers_running; /* used for quiesce/restart */
344 bool powersave; /* powersave requested for this iface */
345 enum ieee80211_smps_mode req_smps, /* requested smps mode */
346 ap_smps; /* smps mode AP thinks we're in */
353 IEEE80211_MFP_DISABLED,
354 IEEE80211_MFP_OPTIONAL,
355 IEEE80211_MFP_REQUIRED
356 } mfp; /* management frame protection */
358 int wmm_last_param_set;
362 /* Signal strength from the last Beacon frame in the current BSS. */
363 int last_beacon_signal;
366 * Weighted average of the signal strength from Beacon frames in the
367 * current BSS. This is in units of 1/16 of the signal unit to maintain
368 * accuracy and to speed up calculations, i.e., the value need to be
369 * divided by 16 to get the actual value.
371 int ave_beacon_signal;
374 * Last Beacon frame signal strength average (ave_beacon_signal / 16)
375 * that triggered a cqm event. 0 indicates that no event has been
376 * generated for the current association.
378 int last_cqm_event_signal;
381 enum ieee80211_ibss_request {
382 IEEE80211_IBSS_REQ_RUN = 0,
385 struct ieee80211_if_ibss {
386 struct timer_list timer;
387 struct work_struct work;
389 unsigned long request;
390 unsigned long last_scan_completed;
399 u8 ssid[IEEE80211_MAX_SSID_LEN];
402 struct ieee80211_channel *channel;
404 unsigned long ibss_join_req;
405 /* probe response/beacon for IBSS */
406 struct sk_buff *presp, *skb;
409 IEEE80211_IBSS_MLME_SEARCH,
410 IEEE80211_IBSS_MLME_JOINED,
414 struct ieee80211_if_mesh {
415 struct work_struct work;
416 struct timer_list housekeeping_timer;
417 struct timer_list mesh_path_timer;
418 struct timer_list mesh_path_root_timer;
420 unsigned long timers_running;
422 unsigned long wrkq_flags;
424 u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
426 /* Active Path Selection Protocol Identifier */
428 /* Active Path Selection Metric Identifier */
430 /* Congestion Control Mode Identifier */
432 /* Synchronization Protocol Identifier */
434 /* Authentication Protocol Identifier */
436 /* Local mesh Sequence Number */
438 /* Last used PREQ ID */
441 /* Timestamp of last SN update */
442 unsigned long last_sn_update;
443 /* Timestamp of last SN sent */
444 unsigned long last_preq;
445 struct mesh_rmc *rmc;
446 spinlock_t mesh_preq_queue_lock;
447 struct mesh_preq_queue preq_queue;
449 struct mesh_stats mshstats;
450 struct mesh_config mshcfg;
452 bool accepting_plinks;
455 #ifdef CONFIG_MAC80211_MESH
456 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
457 do { (msh)->mshstats.name++; } while (0)
459 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
464 * enum ieee80211_sub_if_data_flags - virtual interface flags
466 * @IEEE80211_SDATA_ALLMULTI: interface wants all multicast packets
467 * @IEEE80211_SDATA_PROMISC: interface is promisc
468 * @IEEE80211_SDATA_OPERATING_GMODE: operating in G-only mode
469 * @IEEE80211_SDATA_DONT_BRIDGE_PACKETS: bridge packets between
470 * associated stations and deliver multicast frames both
471 * back to wireless media and to the local net stack.
473 enum ieee80211_sub_if_data_flags {
474 IEEE80211_SDATA_ALLMULTI = BIT(0),
475 IEEE80211_SDATA_PROMISC = BIT(1),
476 IEEE80211_SDATA_OPERATING_GMODE = BIT(2),
477 IEEE80211_SDATA_DONT_BRIDGE_PACKETS = BIT(3),
480 struct ieee80211_sub_if_data {
481 struct list_head list;
483 struct wireless_dev wdev;
486 struct list_head key_list;
488 struct net_device *dev;
489 struct ieee80211_local *local;
493 int drop_unencrypted;
498 * keep track of whether the HT opmode (stored in
499 * vif.bss_info.ht_operation_mode) is valid.
501 bool ht_opmode_valid;
503 /* Fragment table for host-based reassembly */
504 struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
505 unsigned int fragment_next;
507 #define NUM_DEFAULT_KEYS 4
508 #define NUM_DEFAULT_MGMT_KEYS 2
509 struct ieee80211_key *keys[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
510 struct ieee80211_key *default_key;
511 struct ieee80211_key *default_mgmt_key;
515 struct sk_buff_head skb_queue;
518 * AP this belongs to: self in AP mode and
519 * corresponding AP in VLAN mode, NULL for
520 * all others (might be needed later in IBSS)
522 struct ieee80211_if_ap *bss;
524 /* bitmap of allowed (non-MCS) rate indexes for rate control */
525 u32 rc_rateidx_mask[IEEE80211_NUM_BANDS];
528 struct ieee80211_if_ap ap;
529 struct ieee80211_if_wds wds;
530 struct ieee80211_if_vlan vlan;
531 struct ieee80211_if_managed mgd;
532 struct ieee80211_if_ibss ibss;
533 #ifdef CONFIG_MAC80211_MESH
534 struct ieee80211_if_mesh mesh;
539 #ifdef CONFIG_MAC80211_DEBUGFS
542 struct dentry *default_key;
543 struct dentry *default_mgmt_key;
546 /* must be last, dynamically sized area in this! */
547 struct ieee80211_vif vif;
551 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
553 return container_of(p, struct ieee80211_sub_if_data, vif);
557 ieee80211_sdata_set_mesh_id(struct ieee80211_sub_if_data *sdata,
558 u8 mesh_id_len, u8 *mesh_id)
560 #ifdef CONFIG_MAC80211_MESH
561 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
562 ifmsh->mesh_id_len = mesh_id_len;
563 memcpy(ifmsh->mesh_id, mesh_id, mesh_id_len);
570 IEEE80211_RX_MSG = 1,
571 IEEE80211_TX_STATUS_MSG = 2,
572 IEEE80211_DELBA_MSG = 3,
573 IEEE80211_ADDBA_MSG = 4,
576 enum queue_stop_reason {
577 IEEE80211_QUEUE_STOP_REASON_DRIVER,
578 IEEE80211_QUEUE_STOP_REASON_PS,
579 IEEE80211_QUEUE_STOP_REASON_CSA,
580 IEEE80211_QUEUE_STOP_REASON_AGGREGATION,
581 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
582 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
586 * mac80211 scan flags - currently active scan mode
588 * @SCAN_SW_SCANNING: We're currently in the process of scanning but may as
589 * well be on the operating channel
590 * @SCAN_HW_SCANNING: The hardware is scanning for us, we have no way to
591 * determine if we are on the operating channel or not
592 * @SCAN_OFF_CHANNEL: We're off our operating channel for scanning,
593 * gets only set in conjunction with SCAN_SW_SCANNING
602 * enum mac80211_scan_state - scan state machine states
604 * @SCAN_DECISION: Main entry point to the scan state machine, this state
605 * determines if we should keep on scanning or switch back to the
607 * @SCAN_SET_CHANNEL: Set the next channel to be scanned
608 * @SCAN_SEND_PROBE: Send probe requests and wait for probe responses
609 * @SCAN_LEAVE_OPER_CHANNEL: Leave the operating channel, notify the AP
610 * about us leaving the channel and stop all associated STA interfaces
611 * @SCAN_ENTER_OPER_CHANNEL: Enter the operating channel again, notify the
612 * AP about us being back and restart all associated STA interfaces
614 enum mac80211_scan_state {
618 SCAN_LEAVE_OPER_CHANNEL,
619 SCAN_ENTER_OPER_CHANNEL,
622 struct ieee80211_local {
623 /* embed the driver visible part.
624 * don't cast (use the static inlines below), but we keep
625 * it first anyway so they become a no-op */
626 struct ieee80211_hw hw;
628 const struct ieee80211_ops *ops;
631 * work stuff, potentially off-channel (in the future)
633 struct mutex work_mtx;
634 struct list_head work_list;
635 struct timer_list work_timer;
636 struct work_struct work_work;
637 struct sk_buff_head work_skb_queue;
640 * private workqueue to mac80211. mac80211 makes this accessible
641 * via ieee80211_queue_work()
643 struct workqueue_struct *workqueue;
645 unsigned long queue_stop_reasons[IEEE80211_MAX_QUEUES];
646 /* also used to protect ampdu_ac_queue and amdpu_ac_stop_refcnt */
647 spinlock_t queue_stop_reason_lock;
650 int monitors, cooked_mntrs;
651 /* number of interfaces with corresponding FIF_ flags */
652 int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss, fif_pspoll;
653 unsigned int filter_flags; /* FIF_* */
655 /* protects the aggregated multicast list and filter calls */
656 spinlock_t filter_lock;
658 /* used for uploading changed mc list */
659 struct work_struct reconfig_filter;
661 /* used to reconfigure hardware SM PS */
662 struct work_struct recalc_smps;
664 /* aggregated multicast list */
665 struct netdev_hw_addr_list mc_list;
667 bool tim_in_locked_section; /* see ieee80211_beacon_get() */
670 * suspended is true if we finished all the suspend _and_ we have
671 * not yet come up from resume. This is to be used by mac80211
672 * to ensure driver sanity during suspend and mac80211's own
673 * sanity. It can eventually be used for WoW as well.
678 * Resuming is true while suspended, but when we're reprogramming the
679 * hardware -- at that time it's allowed to use ieee80211_queue_work()
680 * again even though some other parts of the stack are still suspended
681 * and we still drop received frames to avoid waking the stack.
686 * quiescing is true during the suspend process _only_ to
687 * ease timer cancelling etc.
691 /* device is started */
694 int tx_headroom; /* required headroom for hardware/radiotap */
696 /* Tasklet and skb queue to process calls from IRQ mode. All frames
697 * added to skb_queue will be processed, but frames in
698 * skb_queue_unreliable may be dropped if the total length of these
699 * queues increases over the limit. */
700 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
701 struct tasklet_struct tasklet;
702 struct sk_buff_head skb_queue;
703 struct sk_buff_head skb_queue_unreliable;
707 * The mutex only protects the list and counter,
708 * reads are done in RCU.
709 * Additionally, the lock protects the hash table,
710 * the pending list and each BSS's TIM bitmap.
712 struct mutex sta_mtx;
714 unsigned long num_sta;
715 struct list_head sta_list, sta_pending_list;
716 struct sta_info *sta_hash[STA_HASH_SIZE];
717 struct timer_list sta_cleanup;
718 struct work_struct sta_finish_work;
721 struct sk_buff_head pending[IEEE80211_MAX_QUEUES];
722 struct tasklet_struct tx_pending_tasklet;
725 * This lock is used to prevent concurrent A-MPDU
726 * session start/stop processing, this thus also
727 * synchronises the ->ampdu_action() callback to
728 * drivers and limits it to one at a time.
730 spinlock_t ampdu_lock;
732 /* number of interfaces with corresponding IFF_ flags */
733 atomic_t iff_allmultis, iff_promiscs;
735 struct rate_control_ref *rate_ctrl;
737 struct crypto_blkcipher *wep_tx_tfm;
738 struct crypto_blkcipher *wep_rx_tfm;
742 struct list_head interfaces;
743 struct mutex iflist_mtx;
746 * Key mutex, protects sdata's key_list and sta_info's
747 * key pointers (write access, they're RCU.)
749 struct mutex key_mtx;
752 /* Scanning and BSS list */
753 struct mutex scan_mtx;
754 unsigned long scanning;
755 struct cfg80211_ssid scan_ssid;
756 struct cfg80211_scan_request *int_scan_req;
757 struct cfg80211_scan_request *scan_req, *hw_scan_req;
758 struct ieee80211_channel *scan_channel;
759 enum ieee80211_band hw_scan_band;
760 int scan_channel_idx;
763 unsigned long leave_oper_channel_time;
764 enum mac80211_scan_state next_scan_state;
765 struct delayed_work scan_work;
766 struct ieee80211_sub_if_data *scan_sdata;
767 enum nl80211_channel_type _oper_channel_type;
768 struct ieee80211_channel *oper_channel, *csa_channel;
770 /* Temporary remain-on-channel for off-channel operations */
771 struct ieee80211_channel *tmp_channel;
772 enum nl80211_channel_type tmp_channel_type;
775 /* dot11CountersTable */
776 u32 dot11TransmittedFragmentCount;
777 u32 dot11MulticastTransmittedFrameCount;
778 u32 dot11FailedCount;
780 u32 dot11MultipleRetryCount;
781 u32 dot11FrameDuplicateCount;
782 u32 dot11ReceivedFragmentCount;
783 u32 dot11MulticastReceivedFrameCount;
784 u32 dot11TransmittedFrameCount;
786 #ifdef CONFIG_MAC80211_LEDS
787 int tx_led_counter, rx_led_counter;
788 struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led;
789 char tx_led_name[32], rx_led_name[32],
790 assoc_led_name[32], radio_led_name[32];
793 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
794 /* TX/RX handler statistics */
795 unsigned int tx_handlers_drop;
796 unsigned int tx_handlers_queued;
797 unsigned int tx_handlers_drop_unencrypted;
798 unsigned int tx_handlers_drop_fragment;
799 unsigned int tx_handlers_drop_wep;
800 unsigned int tx_handlers_drop_not_assoc;
801 unsigned int tx_handlers_drop_unauth_port;
802 unsigned int rx_handlers_drop;
803 unsigned int rx_handlers_queued;
804 unsigned int rx_handlers_drop_nullfunc;
805 unsigned int rx_handlers_drop_defrag;
806 unsigned int rx_handlers_drop_short;
807 unsigned int rx_handlers_drop_passive_scan;
808 unsigned int tx_expand_skb_head;
809 unsigned int tx_expand_skb_head_cloned;
810 unsigned int rx_expand_skb_head;
811 unsigned int rx_expand_skb_head2;
812 unsigned int rx_handlers_fragments;
813 unsigned int tx_status_drop;
814 #define I802_DEBUG_INC(c) (c)++
815 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
816 #define I802_DEBUG_INC(c) do { } while (0)
817 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
820 int total_ps_buffered; /* total number of all buffered unicast and
821 * multicast packets for power saving stations
823 int wifi_wme_noack_test;
824 unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */
827 * Bitmask of enabled u-apsd queues,
828 * IEEE80211_WMM_IE_STA_QOSINFO_AC_BE & co. Needs a new association
831 unsigned int uapsd_queues;
834 * Maximum number of buffered frames AP can deliver during a
835 * service period, IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL or similar.
836 * Needs a new association to take effect.
838 unsigned int uapsd_max_sp_len;
841 bool offchannel_ps_enabled;
843 * PS can only be enabled when we have exactly one managed
844 * interface (and monitors) in PS, this then points there.
846 struct ieee80211_sub_if_data *ps_sdata;
847 struct work_struct dynamic_ps_enable_work;
848 struct work_struct dynamic_ps_disable_work;
849 struct timer_list dynamic_ps_timer;
850 struct notifier_block network_latency_notifier;
851 struct notifier_block ifa_notifier;
853 int user_power_level; /* in dBm */
854 int power_constr_level; /* in dBm */
856 enum ieee80211_smps_mode smps_mode;
858 struct work_struct restart_work;
860 #ifdef CONFIG_MAC80211_DEBUGFS
861 struct local_debugfsdentries {
862 struct dentry *rcdir;
863 struct dentry *stations;
869 static inline struct ieee80211_sub_if_data *
870 IEEE80211_DEV_TO_SUB_IF(struct net_device *dev)
872 return netdev_priv(dev);
875 /* this struct represents 802.11n's RA/TID combination along with our vif */
876 struct ieee80211_ra_tid {
877 struct ieee80211_vif *vif;
882 /* Parsed Information Elements */
883 struct ieee802_11_elems {
887 /* pointers to IEs */
893 struct ieee80211_tim_ie *tim;
902 struct ieee80211_ht_cap *ht_cap_elem;
903 struct ieee80211_ht_info *ht_info_elem;
904 struct ieee80211_meshconf_ie *mesh_config;
910 struct ieee80211_rann_ie *rann;
914 u8 *quiet_elem; /* first quite element */
917 /* length of them, respectively */
929 u8 ext_supp_rates_len;
937 u8 ch_switch_elem_len;
939 u8 pwr_constr_elem_len;
941 u8 num_of_quiet_elem; /* can be more the one */
945 static inline struct ieee80211_local *hw_to_local(
946 struct ieee80211_hw *hw)
948 return container_of(hw, struct ieee80211_local, hw);
951 static inline struct ieee80211_hw *local_to_hw(
952 struct ieee80211_local *local)
958 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
960 return compare_ether_addr(raddr, addr) == 0 ||
961 is_broadcast_ether_addr(raddr);
965 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed);
966 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
967 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
969 void ieee80211_configure_filter(struct ieee80211_local *local);
970 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
972 extern bool ieee80211_disable_40mhz_24ghz;
975 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata);
976 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
977 struct cfg80211_auth_request *req);
978 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
979 struct cfg80211_assoc_request *req);
980 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
981 struct cfg80211_deauth_request *req,
983 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
984 struct cfg80211_disassoc_request *req,
986 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
987 struct sk_buff *skb);
988 void ieee80211_send_pspoll(struct ieee80211_local *local,
989 struct ieee80211_sub_if_data *sdata);
990 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency);
991 int ieee80211_max_network_latency(struct notifier_block *nb,
992 unsigned long data, void *dummy);
993 int ieee80211_set_arp_filter(struct ieee80211_sub_if_data *sdata);
994 void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
995 struct ieee80211_channel_sw_ie *sw_elem,
996 struct ieee80211_bss *bss,
998 void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata);
999 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata);
1002 void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local);
1003 void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata);
1005 ieee80211_ibss_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
1006 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
1007 u8 *bssid, u8 *addr, u32 supp_rates,
1009 int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
1010 struct cfg80211_ibss_params *params);
1011 int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata);
1012 void ieee80211_ibss_quiesce(struct ieee80211_sub_if_data *sdata);
1013 void ieee80211_ibss_restart(struct ieee80211_sub_if_data *sdata);
1015 /* scan/BSS handling */
1016 void ieee80211_scan_work(struct work_struct *work);
1017 int ieee80211_request_internal_scan(struct ieee80211_sub_if_data *sdata,
1018 const u8 *ssid, u8 ssid_len,
1019 struct ieee80211_channel *chan);
1020 int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
1021 struct cfg80211_scan_request *req);
1022 void ieee80211_scan_cancel(struct ieee80211_local *local);
1024 ieee80211_scan_rx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
1026 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local);
1027 struct ieee80211_bss *
1028 ieee80211_bss_info_update(struct ieee80211_local *local,
1029 struct ieee80211_rx_status *rx_status,
1030 struct ieee80211_mgmt *mgmt,
1032 struct ieee802_11_elems *elems,
1033 struct ieee80211_channel *channel,
1035 struct ieee80211_bss *
1036 ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq,
1037 u8 *ssid, u8 ssid_len);
1038 void ieee80211_rx_bss_put(struct ieee80211_local *local,
1039 struct ieee80211_bss *bss);
1041 /* off-channel helpers */
1042 void ieee80211_offchannel_stop_beaconing(struct ieee80211_local *local);
1043 void ieee80211_offchannel_stop_station(struct ieee80211_local *local);
1044 void ieee80211_offchannel_return(struct ieee80211_local *local,
1045 bool enable_beaconing);
1047 /* interface handling */
1048 int ieee80211_iface_init(void);
1049 void ieee80211_iface_exit(void);
1050 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1051 struct net_device **new_dev, enum nl80211_iftype type,
1052 struct vif_params *params);
1053 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1054 enum nl80211_iftype type);
1055 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata);
1056 void ieee80211_remove_interfaces(struct ieee80211_local *local);
1057 u32 __ieee80211_recalc_idle(struct ieee80211_local *local);
1058 void ieee80211_recalc_idle(struct ieee80211_local *local);
1060 static inline bool ieee80211_sdata_running(struct ieee80211_sub_if_data *sdata)
1062 return netif_running(sdata->dev);
1066 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
1067 void ieee80211_tx_pending(unsigned long data);
1068 netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
1069 struct net_device *dev);
1070 netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
1071 struct net_device *dev);
1074 * radiotap header for status frames
1076 struct ieee80211_tx_status_rtap_hdr {
1077 struct ieee80211_radiotap_header hdr;
1079 u8 padding_for_rate;
1082 } __attribute__ ((packed));
1086 void ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_supported_band *sband,
1087 struct ieee80211_ht_cap *ht_cap_ie,
1088 struct ieee80211_sta_ht_cap *ht_cap);
1089 void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn);
1090 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
1091 const u8 *da, u16 tid,
1092 u16 initiator, u16 reason_code);
1093 int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata,
1094 enum ieee80211_smps_mode smps, const u8 *da,
1097 void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1098 u16 initiator, u16 reason);
1099 void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta);
1100 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
1101 struct sta_info *sta,
1102 struct ieee80211_mgmt *mgmt, size_t len);
1103 void ieee80211_process_addba_resp(struct ieee80211_local *local,
1104 struct sta_info *sta,
1105 struct ieee80211_mgmt *mgmt,
1107 void ieee80211_process_addba_request(struct ieee80211_local *local,
1108 struct sta_info *sta,
1109 struct ieee80211_mgmt *mgmt,
1112 int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1113 enum ieee80211_back_parties initiator);
1114 int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1115 enum ieee80211_back_parties initiator);
1117 /* Spectrum management */
1118 void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata,
1119 struct ieee80211_mgmt *mgmt,
1122 /* Suspend/resume and hw reconfiguration */
1123 int ieee80211_reconfig(struct ieee80211_local *local);
1124 void ieee80211_stop_device(struct ieee80211_local *local);
1127 int __ieee80211_suspend(struct ieee80211_hw *hw);
1129 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
1131 return ieee80211_reconfig(hw_to_local(hw));
1134 static inline int __ieee80211_suspend(struct ieee80211_hw *hw)
1139 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
1145 /* utility functions/constants */
1146 extern void *mac80211_wiphy_privid; /* for wiphy privid */
1147 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
1148 enum nl80211_iftype type);
1149 int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
1150 int rate, int erp, int short_preamble);
1151 void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx,
1152 struct ieee80211_hdr *hdr, const u8 *tsc,
1154 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata);
1155 void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb);
1156 void ieee802_11_parse_elems(u8 *start, size_t len,
1157 struct ieee802_11_elems *elems);
1158 u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
1159 struct ieee802_11_elems *elems,
1160 u64 filter, u32 crc);
1161 u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
1162 enum ieee80211_band band);
1164 void ieee80211_dynamic_ps_enable_work(struct work_struct *work);
1165 void ieee80211_dynamic_ps_disable_work(struct work_struct *work);
1166 void ieee80211_dynamic_ps_timer(unsigned long data);
1167 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1168 struct ieee80211_sub_if_data *sdata,
1170 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1171 struct ieee80211_hdr *hdr);
1172 void ieee80211_beacon_connection_loss_work(struct work_struct *work);
1174 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
1175 enum queue_stop_reason reason);
1176 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
1177 enum queue_stop_reason reason);
1178 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
1179 enum queue_stop_reason reason);
1180 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
1181 enum queue_stop_reason reason);
1182 void ieee80211_add_pending_skb(struct ieee80211_local *local,
1183 struct sk_buff *skb);
1184 int ieee80211_add_pending_skbs(struct ieee80211_local *local,
1185 struct sk_buff_head *skbs);
1187 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1188 u16 transaction, u16 auth_alg,
1189 u8 *extra, size_t extra_len, const u8 *bssid,
1190 const u8 *key, u8 key_len, u8 key_idx);
1191 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1192 const u8 *ie, size_t ie_len,
1193 enum ieee80211_band band);
1194 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1195 const u8 *ssid, size_t ssid_len,
1196 const u8 *ie, size_t ie_len);
1198 void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
1199 const size_t supp_rates_len,
1200 const u8 *supp_rates);
1201 u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
1202 struct ieee802_11_elems *elems,
1203 enum ieee80211_band band);
1204 int __ieee80211_request_smps(struct ieee80211_sub_if_data *sdata,
1205 enum ieee80211_smps_mode smps_mode);
1206 void ieee80211_recalc_smps(struct ieee80211_local *local,
1207 struct ieee80211_sub_if_data *forsdata);
1209 size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
1210 const u8 *ids, int n_ids, size_t offset);
1211 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset);
1213 /* internal work items */
1214 void ieee80211_work_init(struct ieee80211_local *local);
1215 void ieee80211_add_work(struct ieee80211_work *wk);
1216 void free_work(struct ieee80211_work *wk);
1217 void ieee80211_work_purge(struct ieee80211_sub_if_data *sdata);
1218 ieee80211_rx_result ieee80211_work_rx_mgmt(struct ieee80211_sub_if_data *sdata,
1219 struct sk_buff *skb);
1220 int ieee80211_wk_remain_on_channel(struct ieee80211_sub_if_data *sdata,
1221 struct ieee80211_channel *chan,
1222 enum nl80211_channel_type channel_type,
1223 unsigned int duration, u64 *cookie);
1224 int ieee80211_wk_cancel_remain_on_channel(
1225 struct ieee80211_sub_if_data *sdata, u64 cookie);
1227 /* channel management */
1228 enum ieee80211_chan_mode {
1229 CHAN_MODE_UNDEFINED,
1234 enum ieee80211_chan_mode
1235 ieee80211_get_channel_mode(struct ieee80211_local *local,
1236 struct ieee80211_sub_if_data *ignore);
1237 bool ieee80211_set_channel_type(struct ieee80211_local *local,
1238 struct ieee80211_sub_if_data *sdata,
1239 enum nl80211_channel_type chantype);
1241 #ifdef CONFIG_MAC80211_NOINLINE
1242 #define debug_noinline noinline
1244 #define debug_noinline
1247 #endif /* IEEE80211_I_H */