1 /*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2007-2008 Johannes Berg <johannes@sipsolutions.net>
6 *
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.
10 */
11
12 #ifndef IEEE80211_I_H
13 #define IEEE80211_I_H
14
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/cfg80211.h>
27 #include <net/wireless.h>
28 #include <net/iw_handler.h>
29 #include <net/mac80211.h>
30 #include "key.h"
31 #include "sta_info.h"
32
33 struct ieee80211_local;
34
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
38
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
43
44 /* Required encryption head and tailroom */
45 #define IEEE80211_ENCRYPT_HEADROOM 8
46 #define IEEE80211_ENCRYPT_TAILROOM 12
47
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
53
54 /*
55 * Time after which we ignore scan results and no longer report/use
56 * them in any way.
57 */
58 #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
59
60 struct ieee80211_fragment_entry {
61 unsigned long first_frag_time;
62 unsigned int seq;
63 unsigned int rx_queue;
64 unsigned int last_frag;
65 unsigned int extra_len;
66 struct sk_buff_head skb_list;
67 int ccmp; /* Whether fragments were encrypted with CCMP */
68 u8 last_pn[6]; /* PN of the last fragment if CCMP was used */
69 };
70
71
72 struct ieee80211_bss {
73 struct list_head list;
74 struct ieee80211_bss *hnext;
75 size_t ssid_len;
76
77 atomic_t users;
78
79 u8 bssid[ETH_ALEN];
80 u8 ssid[IEEE80211_MAX_SSID_LEN];
81 u8 dtim_period;
82 u16 capability; /* host byte order */
83 enum ieee80211_band band;
84 int freq;
85 int signal, noise, qual;
86 u8 *ies; /* all information elements from the last Beacon or Probe
87 * Response frames; note Beacon frame is not allowed to
88 * override values from Probe Response */
89 size_t ies_len;
90 bool wmm_used;
91 #ifdef CONFIG_MAC80211_MESH
92 u8 *mesh_id;
93 size_t mesh_id_len;
94 u8 *mesh_cfg;
95 #endif
96 #define IEEE80211_MAX_SUPP_RATES 32
97 u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
98 size_t supp_rates_len;
99 u64 timestamp;
100 int beacon_int;
101
102 unsigned long last_probe_resp;
103 unsigned long last_update;
104
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. */
109 int has_erp_value;
110 u8 erp_value;
111 };
112
bss_mesh_cfg(struct ieee80211_bss * bss)113 static inline u8 *bss_mesh_cfg(struct ieee80211_bss *bss)
114 {
115 #ifdef CONFIG_MAC80211_MESH
116 return bss->mesh_cfg;
117 #endif
118 return NULL;
119 }
120
bss_mesh_id(struct ieee80211_bss * bss)121 static inline u8 *bss_mesh_id(struct ieee80211_bss *bss)
122 {
123 #ifdef CONFIG_MAC80211_MESH
124 return bss->mesh_id;
125 #endif
126 return NULL;
127 }
128
bss_mesh_id_len(struct ieee80211_bss * bss)129 static inline u8 bss_mesh_id_len(struct ieee80211_bss *bss)
130 {
131 #ifdef CONFIG_MAC80211_MESH
132 return bss->mesh_id_len;
133 #endif
134 return 0;
135 }
136
137
138 typedef unsigned __bitwise__ ieee80211_tx_result;
139 #define TX_CONTINUE ((__force ieee80211_tx_result) 0u)
140 #define TX_DROP ((__force ieee80211_tx_result) 1u)
141 #define TX_QUEUED ((__force ieee80211_tx_result) 2u)
142
143 #define IEEE80211_TX_FRAGMENTED BIT(0)
144 #define IEEE80211_TX_UNICAST BIT(1)
145 #define IEEE80211_TX_PS_BUFFERED BIT(2)
146
147 struct ieee80211_tx_data {
148 struct sk_buff *skb;
149 struct net_device *dev;
150 struct ieee80211_local *local;
151 struct ieee80211_sub_if_data *sdata;
152 struct sta_info *sta;
153 struct ieee80211_key *key;
154
155 struct ieee80211_channel *channel;
156
157 /* Extra fragments (in addition to the first fragment
158 * in skb) */
159 struct sk_buff **extra_frag;
160 int num_extra_frag;
161
162 u16 ethertype;
163 unsigned int flags;
164 };
165
166
167 typedef unsigned __bitwise__ ieee80211_rx_result;
168 #define RX_CONTINUE ((__force ieee80211_rx_result) 0u)
169 #define RX_DROP_UNUSABLE ((__force ieee80211_rx_result) 1u)
170 #define RX_DROP_MONITOR ((__force ieee80211_rx_result) 2u)
171 #define RX_QUEUED ((__force ieee80211_rx_result) 3u)
172
173 #define IEEE80211_RX_IN_SCAN BIT(0)
174 /* frame is destined to interface currently processed (incl. multicast frames) */
175 #define IEEE80211_RX_RA_MATCH BIT(1)
176 #define IEEE80211_RX_AMSDU BIT(2)
177 #define IEEE80211_RX_CMNTR_REPORTED BIT(3)
178 #define IEEE80211_RX_FRAGMENTED BIT(4)
179
180 struct ieee80211_rx_data {
181 struct sk_buff *skb;
182 struct net_device *dev;
183 struct ieee80211_local *local;
184 struct ieee80211_sub_if_data *sdata;
185 struct sta_info *sta;
186 struct ieee80211_key *key;
187 struct ieee80211_rx_status *status;
188 struct ieee80211_rate *rate;
189
190 unsigned int flags;
191 int sent_ps_buffered;
192 int queue;
193 u32 tkip_iv32;
194 u16 tkip_iv16;
195 };
196
197 struct ieee80211_tx_stored_packet {
198 struct sk_buff *skb;
199 struct sk_buff **extra_frag;
200 int num_extra_frag;
201 };
202
203 struct beacon_data {
204 u8 *head, *tail;
205 int head_len, tail_len;
206 int dtim_period;
207 };
208
209 struct ieee80211_if_ap {
210 struct beacon_data *beacon;
211
212 struct list_head vlans;
213
214 /* yes, this looks ugly, but guarantees that we can later use
215 * bitmap_empty :)
216 * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
217 u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
218 struct sk_buff_head ps_bc_buf;
219 atomic_t num_sta_ps; /* number of stations in PS mode */
220 int dtim_count;
221 };
222
223 struct ieee80211_if_wds {
224 struct sta_info *sta;
225 u8 remote_addr[ETH_ALEN];
226 };
227
228 struct ieee80211_if_vlan {
229 struct list_head list;
230 };
231
232 struct mesh_stats {
233 __u32 fwded_frames; /* Mesh forwarded frames */
234 __u32 dropped_frames_ttl; /* Not transmitted since mesh_ttl == 0*/
235 __u32 dropped_frames_no_route; /* Not transmitted, no route found */
236 atomic_t estab_plinks;
237 };
238
239 #define PREQ_Q_F_START 0x1
240 #define PREQ_Q_F_REFRESH 0x2
241 struct mesh_preq_queue {
242 struct list_head list;
243 u8 dst[ETH_ALEN];
244 u8 flags;
245 };
246
247 /* flags used in struct ieee80211_if_sta.flags */
248 #define IEEE80211_STA_SSID_SET BIT(0)
249 #define IEEE80211_STA_BSSID_SET BIT(1)
250 #define IEEE80211_STA_PREV_BSSID_SET BIT(2)
251 #define IEEE80211_STA_AUTHENTICATED BIT(3)
252 #define IEEE80211_STA_ASSOCIATED BIT(4)
253 #define IEEE80211_STA_PROBEREQ_POLL BIT(5)
254 #define IEEE80211_STA_CREATE_IBSS BIT(6)
255 #define IEEE80211_STA_MIXED_CELL BIT(7)
256 #define IEEE80211_STA_WMM_ENABLED BIT(8)
257 #define IEEE80211_STA_AUTO_SSID_SEL BIT(10)
258 #define IEEE80211_STA_AUTO_BSSID_SEL BIT(11)
259 #define IEEE80211_STA_AUTO_CHANNEL_SEL BIT(12)
260 #define IEEE80211_STA_PRIVACY_INVOKED BIT(13)
261 /* flags for MLME request */
262 #define IEEE80211_STA_REQ_SCAN 0
263 #define IEEE80211_STA_REQ_DIRECT_PROBE 1
264 #define IEEE80211_STA_REQ_AUTH 2
265 #define IEEE80211_STA_REQ_RUN 3
266
267 /* STA/IBSS MLME states */
268 enum ieee80211_sta_mlme_state {
269 IEEE80211_STA_MLME_DISABLED,
270 IEEE80211_STA_MLME_DIRECT_PROBE,
271 IEEE80211_STA_MLME_AUTHENTICATE,
272 IEEE80211_STA_MLME_ASSOCIATE,
273 IEEE80211_STA_MLME_ASSOCIATED,
274 IEEE80211_STA_MLME_IBSS_SEARCH,
275 IEEE80211_STA_MLME_IBSS_JOINED,
276 };
277
278 /* bitfield of allowed auth algs */
279 #define IEEE80211_AUTH_ALG_OPEN BIT(0)
280 #define IEEE80211_AUTH_ALG_SHARED_KEY BIT(1)
281 #define IEEE80211_AUTH_ALG_LEAP BIT(2)
282
283 struct ieee80211_if_sta {
284 struct timer_list timer;
285 struct work_struct work;
286 u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
287 u8 ssid[IEEE80211_MAX_SSID_LEN];
288 enum ieee80211_sta_mlme_state state;
289 size_t ssid_len;
290 u8 scan_ssid[IEEE80211_MAX_SSID_LEN];
291 size_t scan_ssid_len;
292 u16 aid;
293 u16 ap_capab, capab;
294 u8 *extra_ie; /* to be added to the end of AssocReq */
295 size_t extra_ie_len;
296
297 /* The last AssocReq/Resp IEs */
298 u8 *assocreq_ies, *assocresp_ies;
299 size_t assocreq_ies_len, assocresp_ies_len;
300
301 struct sk_buff_head skb_queue;
302
303 int assoc_scan_tries; /* number of scans done pre-association */
304 int direct_probe_tries; /* retries for direct probes */
305 int auth_tries; /* retries for auth req */
306 int assoc_tries; /* retries for assoc req */
307
308 unsigned long request;
309
310 unsigned long last_probe;
311
312 unsigned int flags;
313
314 unsigned int auth_algs; /* bitfield of allowed auth algs */
315 int auth_alg; /* currently used IEEE 802.11 authentication algorithm */
316 int auth_transaction;
317
318 unsigned long ibss_join_req;
319 struct sk_buff *probe_resp; /* ProbeResp template for IBSS */
320 u32 supp_rates_bits[IEEE80211_NUM_BANDS];
321
322 int wmm_last_param_set;
323 };
324
325 struct ieee80211_if_mesh {
326 struct work_struct work;
327 struct timer_list housekeeping_timer;
328 struct timer_list mesh_path_timer;
329 struct sk_buff_head skb_queue;
330
331 bool housekeeping;
332
333 u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
334 size_t mesh_id_len;
335 /* Active Path Selection Protocol Identifier */
336 u8 mesh_pp_id[4];
337 /* Active Path Selection Metric Identifier */
338 u8 mesh_pm_id[4];
339 /* Congestion Control Mode Identifier */
340 u8 mesh_cc_id[4];
341 /* Local mesh Destination Sequence Number */
342 u32 dsn;
343 /* Last used PREQ ID */
344 u32 preq_id;
345 atomic_t mpaths;
346 /* Timestamp of last DSN update */
347 unsigned long last_dsn_update;
348 /* Timestamp of last DSN sent */
349 unsigned long last_preq;
350 struct mesh_rmc *rmc;
351 spinlock_t mesh_preq_queue_lock;
352 struct mesh_preq_queue preq_queue;
353 int preq_queue_len;
354 struct mesh_stats mshstats;
355 struct mesh_config mshcfg;
356 u32 mesh_seqnum;
357 bool accepting_plinks;
358 };
359
360 #ifdef CONFIG_MAC80211_MESH
361 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
362 do { (msh)->mshstats.name++; } while (0)
363 #else
364 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
365 do { } while (0)
366 #endif
367
368 /**
369 * enum ieee80211_sub_if_data_flags - virtual interface flags
370 *
371 * @IEEE80211_SDATA_ALLMULTI: interface wants all multicast packets
372 * @IEEE80211_SDATA_PROMISC: interface is promisc
373 * @IEEE80211_SDATA_USERSPACE_MLME: userspace MLME is active
374 * @IEEE80211_SDATA_OPERATING_GMODE: operating in G-only mode
375 * @IEEE80211_SDATA_DONT_BRIDGE_PACKETS: bridge packets between
376 * associated stations and deliver multicast frames both
377 * back to wireless media and to the local net stack.
378 */
379 enum ieee80211_sub_if_data_flags {
380 IEEE80211_SDATA_ALLMULTI = BIT(0),
381 IEEE80211_SDATA_PROMISC = BIT(1),
382 IEEE80211_SDATA_USERSPACE_MLME = BIT(2),
383 IEEE80211_SDATA_OPERATING_GMODE = BIT(3),
384 IEEE80211_SDATA_DONT_BRIDGE_PACKETS = BIT(4),
385 };
386
387 struct ieee80211_sub_if_data {
388 struct list_head list;
389
390 struct wireless_dev wdev;
391
392 /* keys */
393 struct list_head key_list;
394
395 struct net_device *dev;
396 struct ieee80211_local *local;
397
398 unsigned int flags;
399
400 int drop_unencrypted;
401
402 /* Fragment table for host-based reassembly */
403 struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
404 unsigned int fragment_next;
405
406 #define NUM_DEFAULT_KEYS 4
407 struct ieee80211_key *keys[NUM_DEFAULT_KEYS];
408 struct ieee80211_key *default_key;
409
410 u16 sequence_number;
411
412 /*
413 * AP this belongs to: self in AP mode and
414 * corresponding AP in VLAN mode, NULL for
415 * all others (might be needed later in IBSS)
416 */
417 struct ieee80211_if_ap *bss;
418
419 int force_unicast_rateidx; /* forced TX rateidx for unicast frames */
420 int max_ratectrl_rateidx; /* max TX rateidx for rate control */
421
422 union {
423 struct ieee80211_if_ap ap;
424 struct ieee80211_if_wds wds;
425 struct ieee80211_if_vlan vlan;
426 struct ieee80211_if_sta sta;
427 #ifdef CONFIG_MAC80211_MESH
428 struct ieee80211_if_mesh mesh;
429 #endif
430 u32 mntr_flags;
431 } u;
432
433 #ifdef CONFIG_MAC80211_DEBUGFS
434 struct dentry *debugfsdir;
435 union {
436 struct {
437 struct dentry *drop_unencrypted;
438 struct dentry *state;
439 struct dentry *bssid;
440 struct dentry *prev_bssid;
441 struct dentry *ssid_len;
442 struct dentry *aid;
443 struct dentry *ap_capab;
444 struct dentry *capab;
445 struct dentry *extra_ie_len;
446 struct dentry *auth_tries;
447 struct dentry *assoc_tries;
448 struct dentry *auth_algs;
449 struct dentry *auth_alg;
450 struct dentry *auth_transaction;
451 struct dentry *flags;
452 struct dentry *force_unicast_rateidx;
453 struct dentry *max_ratectrl_rateidx;
454 } sta;
455 struct {
456 struct dentry *drop_unencrypted;
457 struct dentry *num_sta_ps;
458 struct dentry *dtim_count;
459 struct dentry *force_unicast_rateidx;
460 struct dentry *max_ratectrl_rateidx;
461 struct dentry *num_buffered_multicast;
462 } ap;
463 struct {
464 struct dentry *drop_unencrypted;
465 struct dentry *peer;
466 struct dentry *force_unicast_rateidx;
467 struct dentry *max_ratectrl_rateidx;
468 } wds;
469 struct {
470 struct dentry *drop_unencrypted;
471 struct dentry *force_unicast_rateidx;
472 struct dentry *max_ratectrl_rateidx;
473 } vlan;
474 struct {
475 struct dentry *mode;
476 } monitor;
477 } debugfs;
478 struct {
479 struct dentry *default_key;
480 } common_debugfs;
481
482 #ifdef CONFIG_MAC80211_MESH
483 struct dentry *mesh_stats_dir;
484 struct {
485 struct dentry *fwded_frames;
486 struct dentry *dropped_frames_ttl;
487 struct dentry *dropped_frames_no_route;
488 struct dentry *estab_plinks;
489 struct timer_list mesh_path_timer;
490 } mesh_stats;
491
492 struct dentry *mesh_config_dir;
493 struct {
494 struct dentry *dot11MeshRetryTimeout;
495 struct dentry *dot11MeshConfirmTimeout;
496 struct dentry *dot11MeshHoldingTimeout;
497 struct dentry *dot11MeshMaxRetries;
498 struct dentry *dot11MeshTTL;
499 struct dentry *auto_open_plinks;
500 struct dentry *dot11MeshMaxPeerLinks;
501 struct dentry *dot11MeshHWMPactivePathTimeout;
502 struct dentry *dot11MeshHWMPpreqMinInterval;
503 struct dentry *dot11MeshHWMPnetDiameterTraversalTime;
504 struct dentry *dot11MeshHWMPmaxPREQretries;
505 struct dentry *path_refresh_time;
506 struct dentry *min_discovery_timeout;
507 } mesh_config;
508 #endif
509
510 #endif
511 /* must be last, dynamically sized area in this! */
512 struct ieee80211_vif vif;
513 };
514
515 static inline
vif_to_sdata(struct ieee80211_vif * p)516 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
517 {
518 return container_of(p, struct ieee80211_sub_if_data, vif);
519 }
520
521 static inline void
ieee80211_sdata_set_mesh_id(struct ieee80211_sub_if_data * sdata,u8 mesh_id_len,u8 * mesh_id)522 ieee80211_sdata_set_mesh_id(struct ieee80211_sub_if_data *sdata,
523 u8 mesh_id_len, u8 *mesh_id)
524 {
525 #ifdef CONFIG_MAC80211_MESH
526 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
527 ifmsh->mesh_id_len = mesh_id_len;
528 memcpy(ifmsh->mesh_id, mesh_id, mesh_id_len);
529 #else
530 WARN_ON(1);
531 #endif
532 }
533
534 enum {
535 IEEE80211_RX_MSG = 1,
536 IEEE80211_TX_STATUS_MSG = 2,
537 IEEE80211_DELBA_MSG = 3,
538 IEEE80211_ADDBA_MSG = 4,
539 };
540
541 enum queue_stop_reason {
542 IEEE80211_QUEUE_STOP_REASON_DRIVER,
543 IEEE80211_QUEUE_STOP_REASON_PS,
544 };
545
546 /* maximum number of hardware queues we support. */
547 #define QD_MAX_QUEUES (IEEE80211_MAX_AMPDU_QUEUES + IEEE80211_MAX_QUEUES)
548
549 struct ieee80211_master_priv {
550 struct ieee80211_local *local;
551 };
552
553 struct ieee80211_local {
554 /* embed the driver visible part.
555 * don't cast (use the static inlines below), but we keep
556 * it first anyway so they become a no-op */
557 struct ieee80211_hw hw;
558
559 const struct ieee80211_ops *ops;
560
561 unsigned long queue_pool[BITS_TO_LONGS(QD_MAX_QUEUES)];
562 unsigned long queue_stop_reasons[IEEE80211_MAX_QUEUES];
563 spinlock_t queue_stop_reason_lock;
564 struct net_device *mdev; /* wmaster# - "master" 802.11 device */
565 int open_count;
566 int monitors, cooked_mntrs;
567 /* number of interfaces with corresponding FIF_ flags */
568 int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss;
569 unsigned int filter_flags; /* FIF_* */
570 struct iw_statistics wstats;
571 u8 wstats_flags;
572 bool tim_in_locked_section; /* see ieee80211_beacon_get() */
573 int tx_headroom; /* required headroom for hardware/radiotap */
574
575 /* Tasklet and skb queue to process calls from IRQ mode. All frames
576 * added to skb_queue will be processed, but frames in
577 * skb_queue_unreliable may be dropped if the total length of these
578 * queues increases over the limit. */
579 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
580 struct tasklet_struct tasklet;
581 struct sk_buff_head skb_queue;
582 struct sk_buff_head skb_queue_unreliable;
583
584 /* Station data */
585 /*
586 * The lock only protects the list, hash, timer and counter
587 * against manipulation, reads are done in RCU. Additionally,
588 * the lock protects each BSS's TIM bitmap.
589 */
590 spinlock_t sta_lock;
591 unsigned long num_sta;
592 struct list_head sta_list;
593 struct list_head sta_flush_list;
594 struct work_struct sta_flush_work;
595 struct sta_info *sta_hash[STA_HASH_SIZE];
596 struct timer_list sta_cleanup;
597
598 unsigned long queues_pending[BITS_TO_LONGS(IEEE80211_MAX_QUEUES)];
599 unsigned long queues_pending_run[BITS_TO_LONGS(IEEE80211_MAX_QUEUES)];
600 struct ieee80211_tx_stored_packet pending_packet[IEEE80211_MAX_QUEUES];
601 struct tasklet_struct tx_pending_tasklet;
602
603 /* number of interfaces with corresponding IFF_ flags */
604 atomic_t iff_allmultis, iff_promiscs;
605
606 struct rate_control_ref *rate_ctrl;
607
608 int rts_threshold;
609 int fragmentation_threshold;
610
611 struct crypto_blkcipher *wep_tx_tfm;
612 struct crypto_blkcipher *wep_rx_tfm;
613 u32 wep_iv;
614
615 struct list_head interfaces;
616
617 /*
618 * Key lock, protects sdata's key_list and sta_info's
619 * key pointers (write access, they're RCU.)
620 */
621 spinlock_t key_lock;
622
623
624 /* Scanning and BSS list */
625 bool sw_scanning, hw_scanning;
626 int scan_channel_idx;
627 enum ieee80211_band scan_band;
628
629 enum { SCAN_SET_CHANNEL, SCAN_SEND_PROBE } scan_state;
630 unsigned long last_scan_completed;
631 struct delayed_work scan_work;
632 struct ieee80211_sub_if_data *scan_sdata;
633 struct ieee80211_channel *oper_channel, *scan_channel;
634 enum nl80211_channel_type oper_channel_type;
635 u8 scan_ssid[IEEE80211_MAX_SSID_LEN];
636 size_t scan_ssid_len;
637 struct list_head bss_list;
638 struct ieee80211_bss *bss_hash[STA_HASH_SIZE];
639 spinlock_t bss_lock;
640
641 /* SNMP counters */
642 /* dot11CountersTable */
643 u32 dot11TransmittedFragmentCount;
644 u32 dot11MulticastTransmittedFrameCount;
645 u32 dot11FailedCount;
646 u32 dot11RetryCount;
647 u32 dot11MultipleRetryCount;
648 u32 dot11FrameDuplicateCount;
649 u32 dot11ReceivedFragmentCount;
650 u32 dot11MulticastReceivedFrameCount;
651 u32 dot11TransmittedFrameCount;
652 u32 dot11WEPUndecryptableCount;
653
654 #ifdef CONFIG_MAC80211_LEDS
655 int tx_led_counter, rx_led_counter;
656 struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led;
657 char tx_led_name[32], rx_led_name[32],
658 assoc_led_name[32], radio_led_name[32];
659 #endif
660
661 #ifdef CONFIG_MAC80211_DEBUGFS
662 struct work_struct sta_debugfs_add;
663 #endif
664
665 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
666 /* TX/RX handler statistics */
667 unsigned int tx_handlers_drop;
668 unsigned int tx_handlers_queued;
669 unsigned int tx_handlers_drop_unencrypted;
670 unsigned int tx_handlers_drop_fragment;
671 unsigned int tx_handlers_drop_wep;
672 unsigned int tx_handlers_drop_not_assoc;
673 unsigned int tx_handlers_drop_unauth_port;
674 unsigned int rx_handlers_drop;
675 unsigned int rx_handlers_queued;
676 unsigned int rx_handlers_drop_nullfunc;
677 unsigned int rx_handlers_drop_defrag;
678 unsigned int rx_handlers_drop_short;
679 unsigned int rx_handlers_drop_passive_scan;
680 unsigned int tx_expand_skb_head;
681 unsigned int tx_expand_skb_head_cloned;
682 unsigned int rx_expand_skb_head;
683 unsigned int rx_expand_skb_head2;
684 unsigned int rx_handlers_fragments;
685 unsigned int tx_status_drop;
686 #define I802_DEBUG_INC(c) (c)++
687 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
688 #define I802_DEBUG_INC(c) do { } while (0)
689 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
690
691
692 int total_ps_buffered; /* total number of all buffered unicast and
693 * multicast packets for power saving stations
694 */
695 int wifi_wme_noack_test;
696 unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */
697
698 bool powersave;
699 int dynamic_ps_timeout;
700 struct work_struct dynamic_ps_enable_work;
701 struct work_struct dynamic_ps_disable_work;
702 struct timer_list dynamic_ps_timer;
703
704 #ifdef CONFIG_MAC80211_DEBUGFS
705 struct local_debugfsdentries {
706 struct dentry *rcdir;
707 struct dentry *rcname;
708 struct dentry *frequency;
709 struct dentry *rts_threshold;
710 struct dentry *fragmentation_threshold;
711 struct dentry *short_retry_limit;
712 struct dentry *long_retry_limit;
713 struct dentry *total_ps_buffered;
714 struct dentry *wep_iv;
715 struct dentry *statistics;
716 struct local_debugfsdentries_statsdentries {
717 struct dentry *transmitted_fragment_count;
718 struct dentry *multicast_transmitted_frame_count;
719 struct dentry *failed_count;
720 struct dentry *retry_count;
721 struct dentry *multiple_retry_count;
722 struct dentry *frame_duplicate_count;
723 struct dentry *received_fragment_count;
724 struct dentry *multicast_received_frame_count;
725 struct dentry *transmitted_frame_count;
726 struct dentry *wep_undecryptable_count;
727 struct dentry *num_scans;
728 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
729 struct dentry *tx_handlers_drop;
730 struct dentry *tx_handlers_queued;
731 struct dentry *tx_handlers_drop_unencrypted;
732 struct dentry *tx_handlers_drop_fragment;
733 struct dentry *tx_handlers_drop_wep;
734 struct dentry *tx_handlers_drop_not_assoc;
735 struct dentry *tx_handlers_drop_unauth_port;
736 struct dentry *rx_handlers_drop;
737 struct dentry *rx_handlers_queued;
738 struct dentry *rx_handlers_drop_nullfunc;
739 struct dentry *rx_handlers_drop_defrag;
740 struct dentry *rx_handlers_drop_short;
741 struct dentry *rx_handlers_drop_passive_scan;
742 struct dentry *tx_expand_skb_head;
743 struct dentry *tx_expand_skb_head_cloned;
744 struct dentry *rx_expand_skb_head;
745 struct dentry *rx_expand_skb_head2;
746 struct dentry *rx_handlers_fragments;
747 struct dentry *tx_status_drop;
748 #endif
749 struct dentry *dot11ACKFailureCount;
750 struct dentry *dot11RTSFailureCount;
751 struct dentry *dot11FCSErrorCount;
752 struct dentry *dot11RTSSuccessCount;
753 } stats;
754 struct dentry *stations;
755 struct dentry *keys;
756 } debugfs;
757 #endif
758 };
759
760 static inline struct ieee80211_sub_if_data *
IEEE80211_DEV_TO_SUB_IF(struct net_device * dev)761 IEEE80211_DEV_TO_SUB_IF(struct net_device *dev)
762 {
763 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
764
765 BUG_ON(!local || local->mdev == dev);
766
767 return netdev_priv(dev);
768 }
769
770 /* this struct represents 802.11n's RA/TID combination */
771 struct ieee80211_ra_tid {
772 u8 ra[ETH_ALEN];
773 u16 tid;
774 };
775
776 /* Parsed Information Elements */
777 struct ieee802_11_elems {
778 u8 *ie_start;
779 size_t total_len;
780
781 /* pointers to IEs */
782 u8 *ssid;
783 u8 *supp_rates;
784 u8 *fh_params;
785 u8 *ds_params;
786 u8 *cf_params;
787 u8 *tim;
788 u8 *ibss_params;
789 u8 *challenge;
790 u8 *wpa;
791 u8 *rsn;
792 u8 *erp_info;
793 u8 *ext_supp_rates;
794 u8 *wmm_info;
795 u8 *wmm_param;
796 struct ieee80211_ht_cap *ht_cap_elem;
797 struct ieee80211_ht_info *ht_info_elem;
798 u8 *mesh_config;
799 u8 *mesh_id;
800 u8 *peer_link;
801 u8 *preq;
802 u8 *prep;
803 u8 *perr;
804 u8 *ch_switch_elem;
805 u8 *country_elem;
806 u8 *pwr_constr_elem;
807 u8 *quiet_elem; /* first quite element */
808
809 /* length of them, respectively */
810 u8 ssid_len;
811 u8 supp_rates_len;
812 u8 fh_params_len;
813 u8 ds_params_len;
814 u8 cf_params_len;
815 u8 tim_len;
816 u8 ibss_params_len;
817 u8 challenge_len;
818 u8 wpa_len;
819 u8 rsn_len;
820 u8 erp_info_len;
821 u8 ext_supp_rates_len;
822 u8 wmm_info_len;
823 u8 wmm_param_len;
824 u8 mesh_config_len;
825 u8 mesh_id_len;
826 u8 peer_link_len;
827 u8 preq_len;
828 u8 prep_len;
829 u8 perr_len;
830 u8 ch_switch_elem_len;
831 u8 country_elem_len;
832 u8 pwr_constr_elem_len;
833 u8 quiet_elem_len;
834 u8 num_of_quiet_elem; /* can be more the one */
835 };
836
hw_to_local(struct ieee80211_hw * hw)837 static inline struct ieee80211_local *hw_to_local(
838 struct ieee80211_hw *hw)
839 {
840 return container_of(hw, struct ieee80211_local, hw);
841 }
842
local_to_hw(struct ieee80211_local * local)843 static inline struct ieee80211_hw *local_to_hw(
844 struct ieee80211_local *local)
845 {
846 return &local->hw;
847 }
848
849
ieee80211_bssid_match(const u8 * raddr,const u8 * addr)850 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
851 {
852 return compare_ether_addr(raddr, addr) == 0 ||
853 is_broadcast_ether_addr(raddr);
854 }
855
856
857 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed);
858 int ieee80211_if_config(struct ieee80211_sub_if_data *sdata, u32 changed);
859 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
860 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
861 u32 changed);
862 void ieee80211_configure_filter(struct ieee80211_local *local);
863
864 /* wireless extensions */
865 extern const struct iw_handler_def ieee80211_iw_handler_def;
866
867 /* STA/IBSS code */
868 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata);
869 void ieee80211_scan_work(struct work_struct *work);
870 void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
871 struct ieee80211_rx_status *rx_status);
872 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len);
873 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len);
874 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid);
875 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
876 struct ieee80211_if_sta *ifsta);
877 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
878 u8 *bssid, u8 *addr, u64 supp_rates);
879 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason);
880 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason);
881 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
882 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
883 struct ieee802_11_elems *elems,
884 enum ieee80211_band band);
885 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
886 u8 *ssid, size_t ssid_len);
887
888 /* scan/BSS handling */
889 int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
890 u8 *ssid, size_t ssid_len);
891 int ieee80211_scan_results(struct ieee80211_local *local,
892 struct iw_request_info *info,
893 char *buf, size_t len);
894 ieee80211_rx_result
895 ieee80211_scan_rx(struct ieee80211_sub_if_data *sdata,
896 struct sk_buff *skb,
897 struct ieee80211_rx_status *rx_status);
898 void ieee80211_rx_bss_list_init(struct ieee80211_local *local);
899 void ieee80211_rx_bss_list_deinit(struct ieee80211_local *local);
900 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata,
901 char *ie, size_t len);
902
903 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local);
904 int ieee80211_start_scan(struct ieee80211_sub_if_data *scan_sdata,
905 u8 *ssid, size_t ssid_len);
906 struct ieee80211_bss *
907 ieee80211_bss_info_update(struct ieee80211_local *local,
908 struct ieee80211_rx_status *rx_status,
909 struct ieee80211_mgmt *mgmt,
910 size_t len,
911 struct ieee802_11_elems *elems,
912 int freq, bool beacon);
913 struct ieee80211_bss *
914 ieee80211_rx_bss_add(struct ieee80211_local *local, u8 *bssid, int freq,
915 u8 *ssid, u8 ssid_len);
916 struct ieee80211_bss *
917 ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq,
918 u8 *ssid, u8 ssid_len);
919 void ieee80211_rx_bss_put(struct ieee80211_local *local,
920 struct ieee80211_bss *bss);
921
922 /* interface handling */
923 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
924 struct net_device **new_dev, enum nl80211_iftype type,
925 struct vif_params *params);
926 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
927 enum nl80211_iftype type);
928 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata);
929 void ieee80211_remove_interfaces(struct ieee80211_local *local);
930
931 /* tx handling */
932 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
933 void ieee80211_tx_pending(unsigned long data);
934 int ieee80211_master_start_xmit(struct sk_buff *skb, struct net_device *dev);
935 int ieee80211_monitor_start_xmit(struct sk_buff *skb, struct net_device *dev);
936 int ieee80211_subif_start_xmit(struct sk_buff *skb, struct net_device *dev);
937
938 /* HT */
939 void ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_supported_band *sband,
940 struct ieee80211_ht_cap *ht_cap_ie,
941 struct ieee80211_sta_ht_cap *ht_cap);
942 u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
943 struct ieee80211_ht_info *hti,
944 u16 ap_ht_cap_flags);
945 void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn);
946
947 void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data *sdata, u8 *da,
948 u16 tid, u16 initiator, u16 reason);
949 void ieee80211_sta_tear_down_BA_sessions(struct ieee80211_sub_if_data *sdata, u8 *addr);
950 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
951 struct sta_info *sta,
952 struct ieee80211_mgmt *mgmt, size_t len);
953 void ieee80211_process_addba_resp(struct ieee80211_local *local,
954 struct sta_info *sta,
955 struct ieee80211_mgmt *mgmt,
956 size_t len);
957 void ieee80211_process_addba_request(struct ieee80211_local *local,
958 struct sta_info *sta,
959 struct ieee80211_mgmt *mgmt,
960 size_t len);
961
962 /* Spectrum management */
963 void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata,
964 struct ieee80211_mgmt *mgmt,
965 size_t len);
966
967 /* utility functions/constants */
968 extern void *mac80211_wiphy_privid; /* for wiphy privid */
969 extern const unsigned char rfc1042_header[6];
970 extern const unsigned char bridge_tunnel_header[6];
971 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
972 enum nl80211_iftype type);
973 int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
974 int rate, int erp, int short_preamble);
975 void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx,
976 struct ieee80211_hdr *hdr);
977 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata);
978 void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
979 int encrypt);
980 void ieee802_11_parse_elems(u8 *start, size_t len,
981 struct ieee802_11_elems *elems);
982 int ieee80211_set_freq(struct ieee80211_sub_if_data *sdata, int freq);
983 u64 ieee80211_mandatory_rates(struct ieee80211_local *local,
984 enum ieee80211_band band);
985
986 void ieee80211_dynamic_ps_enable_work(struct work_struct *work);
987 void ieee80211_dynamic_ps_disable_work(struct work_struct *work);
988 void ieee80211_dynamic_ps_timer(unsigned long data);
989
990 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
991 enum queue_stop_reason reason);
992 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
993 enum queue_stop_reason reason);
994
995 #ifdef CONFIG_MAC80211_NOINLINE
996 #define debug_noinline noinline
997 #else
998 #define debug_noinline
999 #endif
1000
1001 #endif /* IEEE80211_I_H */
1002