ieee80211_i.h 31.3 KB
Newer Older
1 2 3 4
/*
 * Copyright 2002-2005, Instant802 Networks, Inc.
 * Copyright 2005, Devicescape Software, Inc.
 * Copyright 2006-2007	Jiri Benc <jbenc@suse.cz>
5
 * Copyright 2007-2008	Johannes Berg <johannes@sipsolutions.net>
6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#ifndef IEEE80211_I_H
#define IEEE80211_I_H

#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/if_ether.h>
#include <linux/interrupt.h>
#include <linux/list.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <linux/workqueue.h>
#include <linux/types.h>
#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>
J
Johannes Berg 已提交
30
#include "key.h"
31 32
#include "sta_info.h"

33
struct ieee80211_local;
34 35 36 37 38 39 40 41 42 43 44 45

/* Maximum number of broadcast/multicast frames to buffer when some of the
 * associated stations are using power saving. */
#define AP_MAX_BC_BUFFER 128

/* Maximum number of frames buffered to all STAs, including multicast frames.
 * Note: increasing this limit increases the potential memory requirement. Each
 * frame can be up to about 2 kB long. */
#define TOTAL_MAX_TX_BUFFER 512

/* Required encryption head and tailroom */
#define IEEE80211_ENCRYPT_HEADROOM 8
46
#define IEEE80211_ENCRYPT_TAILROOM 18
47 48 49 50 51 52 53

/* IEEE 802.11 (Ch. 9.5 Defragmentation) requires support for concurrent
 * reception of at least three fragmented frames. This limit can be increased
 * by changing this define, at the cost of slower frame reassembly and
 * increased memory use (about 2 kB of RAM per entry). */
#define IEEE80211_FRAGMENT_MAX 4

54 55 56 57 58 59
/*
 * Time after which we ignore scan results and no longer report/use
 * them in any way.
 */
#define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)

60 61
#define TU_TO_EXP_TIME(x)	(jiffies + usecs_to_jiffies((x) * 1024))

62 63 64 65 66 67 68 69 70 71 72 73
struct ieee80211_fragment_entry {
	unsigned long first_frag_time;
	unsigned int seq;
	unsigned int rx_queue;
	unsigned int last_frag;
	unsigned int extra_len;
	struct sk_buff_head skb_list;
	int ccmp; /* Whether fragments were encrypted with CCMP */
	u8 last_pn[6]; /* PN of the last fragment if CCMP was used */
};


74
struct ieee80211_bss {
75
	struct list_head list;
76
	struct ieee80211_bss *hnext;
77 78
	size_t ssid_len;

79 80 81 82
	atomic_t users;

	u8 bssid[ETH_ALEN];
	u8 ssid[IEEE80211_MAX_SSID_LEN];
83
	u8 dtim_period;
84
	u16 capability; /* host byte order */
85
	enum ieee80211_band band;
86
	int freq;
87
	int signal, noise, qual;
88 89 90 91 92
	u8 *ies; /* all information elements from the last Beacon or Probe
		  * Response frames; note Beacon frame is not allowed to
		  * override values from Probe Response */
	size_t ies_len;
	bool wmm_used;
93 94 95
#ifdef CONFIG_MAC80211_MESH
	u8 *mesh_id;
	size_t mesh_id_len;
96
	u8 *mesh_cfg;
J
Johannes Berg 已提交
97
#endif
98 99 100 101
#define IEEE80211_MAX_SUPP_RATES 32
	u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
	size_t supp_rates_len;
	u64 timestamp;
102
	int beacon_int;
103

104
	unsigned long last_probe_resp;
105 106
	unsigned long last_update;

107 108 109 110 111 112
	/* during assocation, we save an ERP value from a probe response so
	 * that we can feed ERP info to the driver when handling the
	 * association completes. these fields probably won't be up-to-date
	 * otherwise, you probably don't want to use them. */
	int has_erp_value;
	u8 erp_value;
113 114
};

115
static inline u8 *bss_mesh_cfg(struct ieee80211_bss *bss)
J
Johannes Berg 已提交
116 117 118 119 120 121 122
{
#ifdef CONFIG_MAC80211_MESH
	return bss->mesh_cfg;
#endif
	return NULL;
}

123
static inline u8 *bss_mesh_id(struct ieee80211_bss *bss)
J
Johannes Berg 已提交
124 125 126 127 128 129 130
{
#ifdef CONFIG_MAC80211_MESH
	return bss->mesh_id;
#endif
	return NULL;
}

131
static inline u8 bss_mesh_id_len(struct ieee80211_bss *bss)
J
Johannes Berg 已提交
132 133 134 135 136 137 138
{
#ifdef CONFIG_MAC80211_MESH
	return bss->mesh_id_len;
#endif
	return 0;
}

139

140 141 142 143 144
typedef unsigned __bitwise__ ieee80211_tx_result;
#define TX_CONTINUE	((__force ieee80211_tx_result) 0u)
#define TX_DROP		((__force ieee80211_tx_result) 1u)
#define TX_QUEUED	((__force ieee80211_tx_result) 2u)

145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161
#define IEEE80211_TX_FRAGMENTED		BIT(0)
#define IEEE80211_TX_UNICAST		BIT(1)
#define IEEE80211_TX_PS_BUFFERED	BIT(2)

struct ieee80211_tx_data {
	struct sk_buff *skb;
	struct net_device *dev;
	struct ieee80211_local *local;
	struct ieee80211_sub_if_data *sdata;
	struct sta_info *sta;
	struct ieee80211_key *key;

	struct ieee80211_channel *channel;

	/* Extra fragments (in addition to the first fragment
	 * in skb) */
	struct sk_buff **extra_frag;
162 163
	int num_extra_frag;

164
	u16 ethertype;
165
	unsigned int flags;
166 167 168
};


169
typedef unsigned __bitwise__ ieee80211_rx_result;
J
Johannes Berg 已提交
170 171 172 173
#define RX_CONTINUE		((__force ieee80211_rx_result) 0u)
#define RX_DROP_UNUSABLE	((__force ieee80211_rx_result) 1u)
#define RX_DROP_MONITOR		((__force ieee80211_rx_result) 2u)
#define RX_QUEUED		((__force ieee80211_rx_result) 3u)
174

175
#define IEEE80211_RX_IN_SCAN		BIT(0)
176
/* frame is destined to interface currently processed (incl. multicast frames) */
177 178 179 180 181 182
#define IEEE80211_RX_RA_MATCH		BIT(1)
#define IEEE80211_RX_AMSDU		BIT(2)
#define IEEE80211_RX_CMNTR_REPORTED	BIT(3)
#define IEEE80211_RX_FRAGMENTED		BIT(4)

struct ieee80211_rx_data {
183 184 185 186 187 188
	struct sk_buff *skb;
	struct net_device *dev;
	struct ieee80211_local *local;
	struct ieee80211_sub_if_data *sdata;
	struct sta_info *sta;
	struct ieee80211_key *key;
189 190
	struct ieee80211_rx_status *status;
	struct ieee80211_rate *rate;
191 192

	unsigned int flags;
193 194 195 196
	int sent_ps_buffered;
	int queue;
	u32 tkip_iv32;
	u16 tkip_iv16;
197 198 199 200 201
};

struct ieee80211_tx_stored_packet {
	struct sk_buff *skb;
	struct sk_buff **extra_frag;
202
	int num_extra_frag;
203 204
};

205 206 207 208 209 210
struct beacon_data {
	u8 *head, *tail;
	int head_len, tail_len;
	int dtim_period;
};

211
struct ieee80211_if_ap {
212
	struct beacon_data *beacon;
213

214 215
	struct list_head vlans;

216 217
	/* yes, this looks ugly, but guarantees that we can later use
	 * bitmap_empty :)
218
	 * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
219 220
	u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
	struct sk_buff_head ps_bc_buf;
221
	atomic_t num_sta_ps; /* number of stations in PS mode */
222
	int dtim_count;
223 224 225 226
};

struct ieee80211_if_wds {
	struct sta_info *sta;
227
	u8 remote_addr[ETH_ALEN];
228 229 230
};

struct ieee80211_if_vlan {
231
	struct list_head list;
232 233
};

234 235 236 237 238 239 240 241 242 243 244 245 246 247 248
struct mesh_stats {
	__u32 fwded_frames;		/* Mesh forwarded frames */
	__u32 dropped_frames_ttl;	/* Not transmitted since mesh_ttl == 0*/
	__u32 dropped_frames_no_route;	/* Not transmitted, no route found */
	atomic_t estab_plinks;
};

#define PREQ_Q_F_START		0x1
#define PREQ_Q_F_REFRESH	0x2
struct mesh_preq_queue {
	struct list_head list;
	u8 dst[ETH_ALEN];
	u8 flags;
};

249 250 251 252 253 254 255 256 257 258 259 260 261
/* flags used in struct ieee80211_if_sta.flags */
#define IEEE80211_STA_SSID_SET		BIT(0)
#define IEEE80211_STA_BSSID_SET		BIT(1)
#define IEEE80211_STA_PREV_BSSID_SET	BIT(2)
#define IEEE80211_STA_AUTHENTICATED	BIT(3)
#define IEEE80211_STA_ASSOCIATED	BIT(4)
#define IEEE80211_STA_PROBEREQ_POLL	BIT(5)
#define IEEE80211_STA_CREATE_IBSS	BIT(6)
#define IEEE80211_STA_MIXED_CELL	BIT(7)
#define IEEE80211_STA_WMM_ENABLED	BIT(8)
#define IEEE80211_STA_AUTO_SSID_SEL	BIT(10)
#define IEEE80211_STA_AUTO_BSSID_SEL	BIT(11)
#define IEEE80211_STA_AUTO_CHANNEL_SEL	BIT(12)
262
#define IEEE80211_STA_PRIVACY_INVOKED	BIT(13)
263
#define IEEE80211_STA_TKIP_WEP_USED	BIT(14)
S
Sujith 已提交
264
#define IEEE80211_STA_CSA_RECEIVED	BIT(15)
265
#define IEEE80211_STA_MFP_ENABLED	BIT(16)
J
Johannes Berg 已提交
266
/* flags for MLME request */
267
#define IEEE80211_STA_REQ_SCAN 0
268 269 270
#define IEEE80211_STA_REQ_DIRECT_PROBE 1
#define IEEE80211_STA_REQ_AUTH 2
#define IEEE80211_STA_REQ_RUN  3
271

J
Johannes Berg 已提交
272
/* STA/IBSS MLME states */
273 274
enum ieee80211_sta_mlme_state {
	IEEE80211_STA_MLME_DISABLED,
275
	IEEE80211_STA_MLME_DIRECT_PROBE,
276 277 278 279 280 281 282 283 284 285 286 287
	IEEE80211_STA_MLME_AUTHENTICATE,
	IEEE80211_STA_MLME_ASSOCIATE,
	IEEE80211_STA_MLME_ASSOCIATED,
	IEEE80211_STA_MLME_IBSS_SEARCH,
	IEEE80211_STA_MLME_IBSS_JOINED,
};

/* bitfield of allowed auth algs */
#define IEEE80211_AUTH_ALG_OPEN BIT(0)
#define IEEE80211_AUTH_ALG_SHARED_KEY BIT(1)
#define IEEE80211_AUTH_ALG_LEAP BIT(2)

288
struct ieee80211_if_sta {
289
	struct timer_list timer;
S
Sujith 已提交
290
	struct timer_list chswitch_timer;
291
	struct work_struct work;
S
Sujith 已提交
292
	struct work_struct chswitch_work;
293 294
	u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
	u8 ssid[IEEE80211_MAX_SSID_LEN];
295
	enum ieee80211_sta_mlme_state state;
296
	size_t ssid_len;
297 298
	u8 scan_ssid[IEEE80211_MAX_SSID_LEN];
	size_t scan_ssid_len;
299 300 301 302 303 304 305 306 307
	u16 aid;
	u16 ap_capab, capab;
	u8 *extra_ie; /* to be added to the end of AssocReq */
	size_t extra_ie_len;

	/* The last AssocReq/Resp IEs */
	u8 *assocreq_ies, *assocresp_ies;
	size_t assocreq_ies_len, assocresp_ies_len;

308 309
	struct sk_buff_head skb_queue;

310
	int assoc_scan_tries; /* number of scans done pre-association */
311
	int direct_probe_tries; /* retries for direct probes */
312 313
	int auth_tries; /* retries for auth req */
	int assoc_tries; /* retries for assoc req */
314

315 316 317 318
	unsigned long request;

	unsigned long last_probe;

319
	unsigned int flags;
320 321 322 323 324

	unsigned int auth_algs; /* bitfield of allowed auth algs */
	int auth_alg; /* currently used IEEE 802.11 authentication algorithm */
	int auth_transaction;

325 326 327 328 329 330
	enum {
		IEEE80211_MFP_DISABLED,
		IEEE80211_MFP_OPTIONAL,
		IEEE80211_MFP_REQUIRED
	} mfp; /* management frame protection */

331 332
	unsigned long ibss_join_req;
	struct sk_buff *probe_resp; /* ProbeResp template for IBSS */
333
	u32 supp_rates_bits[IEEE80211_NUM_BANDS];
334 335

	int wmm_last_param_set;
336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351

	/* Extra IE data for management frames */
	u8 *ie_probereq;
	size_t ie_probereq_len;
	u8 *ie_proberesp;
	size_t ie_proberesp_len;
	u8 *ie_auth;
	size_t ie_auth_len;
	u8 *ie_assocreq;
	size_t ie_assocreq_len;
	u8 *ie_reassocreq;
	size_t ie_reassocreq_len;
	u8 *ie_deauth;
	size_t ie_deauth_len;
	u8 *ie_disassoc;
	size_t ie_disassoc_len;
352 353
};

354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387
struct ieee80211_if_mesh {
	struct work_struct work;
	struct timer_list housekeeping_timer;
	struct timer_list mesh_path_timer;
	struct sk_buff_head skb_queue;

	bool housekeeping;

	u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
	size_t mesh_id_len;
	/* Active Path Selection Protocol Identifier */
	u8 mesh_pp_id[4];
	/* Active Path Selection Metric Identifier */
	u8 mesh_pm_id[4];
	/* Congestion Control Mode Identifier */
	u8 mesh_cc_id[4];
	/* Local mesh Destination Sequence Number */
	u32 dsn;
	/* Last used PREQ ID */
	u32 preq_id;
	atomic_t mpaths;
	/* Timestamp of last DSN update */
	unsigned long last_dsn_update;
	/* Timestamp of last DSN sent */
	unsigned long last_preq;
	struct mesh_rmc *rmc;
	spinlock_t mesh_preq_queue_lock;
	struct mesh_preq_queue preq_queue;
	int preq_queue_len;
	struct mesh_stats mshstats;
	struct mesh_config mshcfg;
	u32 mesh_seqnum;
	bool accepting_plinks;
};
J
Johannes Berg 已提交
388 389

#ifdef CONFIG_MAC80211_MESH
390 391
#define IEEE80211_IFSTA_MESH_CTR_INC(msh, name)	\
	do { (msh)->mshstats.name++; } while (0)
J
Johannes Berg 已提交
392
#else
393
#define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
J
Johannes Berg 已提交
394 395
	do { } while (0)
#endif
396

397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415
/**
 * enum ieee80211_sub_if_data_flags - virtual interface flags
 *
 * @IEEE80211_SDATA_ALLMULTI: interface wants all multicast packets
 * @IEEE80211_SDATA_PROMISC: interface is promisc
 * @IEEE80211_SDATA_USERSPACE_MLME: userspace MLME is active
 * @IEEE80211_SDATA_OPERATING_GMODE: operating in G-only mode
 * @IEEE80211_SDATA_DONT_BRIDGE_PACKETS: bridge packets between
 *	associated stations and deliver multicast frames both
 *	back to wireless media and to the local net stack.
 */
enum ieee80211_sub_if_data_flags {
	IEEE80211_SDATA_ALLMULTI		= BIT(0),
	IEEE80211_SDATA_PROMISC			= BIT(1),
	IEEE80211_SDATA_USERSPACE_MLME		= BIT(2),
	IEEE80211_SDATA_OPERATING_GMODE		= BIT(3),
	IEEE80211_SDATA_DONT_BRIDGE_PACKETS	= BIT(4),
};

416 417 418 419 420
struct ieee80211_sub_if_data {
	struct list_head list;

	struct wireless_dev wdev;

J
Johannes Berg 已提交
421 422 423
	/* keys */
	struct list_head key_list;

424 425 426
	struct net_device *dev;
	struct ieee80211_local *local;

427
	unsigned int flags;
428

429 430 431 432 433 434 435
	int drop_unencrypted;

	/* Fragment table for host-based reassembly */
	struct ieee80211_fragment_entry	fragments[IEEE80211_FRAGMENT_MAX];
	unsigned int fragment_next;

#define NUM_DEFAULT_KEYS 4
436 437
#define NUM_DEFAULT_MGMT_KEYS 2
	struct ieee80211_key *keys[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
438
	struct ieee80211_key *default_key;
439
	struct ieee80211_key *default_mgmt_key;
440

J
Johannes Berg 已提交
441 442
	u16 sequence_number;

443
	/*
444 445 446
	 * AP this belongs to: self in AP mode and
	 * corresponding AP in VLAN mode, NULL for
	 * all others (might be needed later in IBSS)
447
	 */
448 449 450 451
	struct ieee80211_if_ap *bss;

	int force_unicast_rateidx; /* forced TX rateidx for unicast frames */
	int max_ratectrl_rateidx; /* max TX rateidx for rate control */
452 453 454 455 456 457

	union {
		struct ieee80211_if_ap ap;
		struct ieee80211_if_wds wds;
		struct ieee80211_if_vlan vlan;
		struct ieee80211_if_sta sta;
458 459 460
#ifdef CONFIG_MAC80211_MESH
		struct ieee80211_if_mesh mesh;
#endif
461
		u32 mntr_flags;
462
	} u;
J
Jiri Benc 已提交
463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482

#ifdef CONFIG_MAC80211_DEBUGFS
	struct dentry *debugfsdir;
	union {
		struct {
			struct dentry *drop_unencrypted;
			struct dentry *state;
			struct dentry *bssid;
			struct dentry *prev_bssid;
			struct dentry *ssid_len;
			struct dentry *aid;
			struct dentry *ap_capab;
			struct dentry *capab;
			struct dentry *extra_ie_len;
			struct dentry *auth_tries;
			struct dentry *assoc_tries;
			struct dentry *auth_algs;
			struct dentry *auth_alg;
			struct dentry *auth_transaction;
			struct dentry *flags;
483 484
			struct dentry *force_unicast_rateidx;
			struct dentry *max_ratectrl_rateidx;
J
Jiri Benc 已提交
485 486 487 488 489 490 491 492 493 494 495 496
		} sta;
		struct {
			struct dentry *drop_unencrypted;
			struct dentry *num_sta_ps;
			struct dentry *dtim_count;
			struct dentry *force_unicast_rateidx;
			struct dentry *max_ratectrl_rateidx;
			struct dentry *num_buffered_multicast;
		} ap;
		struct {
			struct dentry *drop_unencrypted;
			struct dentry *peer;
497 498
			struct dentry *force_unicast_rateidx;
			struct dentry *max_ratectrl_rateidx;
J
Jiri Benc 已提交
499 500 501
		} wds;
		struct {
			struct dentry *drop_unencrypted;
502 503
			struct dentry *force_unicast_rateidx;
			struct dentry *max_ratectrl_rateidx;
J
Jiri Benc 已提交
504 505 506 507 508
		} vlan;
		struct {
			struct dentry *mode;
		} monitor;
	} debugfs;
509 510
	struct {
		struct dentry *default_key;
511
		struct dentry *default_mgmt_key;
512
	} common_debugfs;
513 514 515 516 517 518 519 520

#ifdef CONFIG_MAC80211_MESH
	struct dentry *mesh_stats_dir;
	struct {
		struct dentry *fwded_frames;
		struct dentry *dropped_frames_ttl;
		struct dentry *dropped_frames_no_route;
		struct dentry *estab_plinks;
J
Johannes Berg 已提交
521
		struct timer_list mesh_path_timer;
522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541
	} mesh_stats;

	struct dentry *mesh_config_dir;
	struct {
		struct dentry *dot11MeshRetryTimeout;
		struct dentry *dot11MeshConfirmTimeout;
		struct dentry *dot11MeshHoldingTimeout;
		struct dentry *dot11MeshMaxRetries;
		struct dentry *dot11MeshTTL;
		struct dentry *auto_open_plinks;
		struct dentry *dot11MeshMaxPeerLinks;
		struct dentry *dot11MeshHWMPactivePathTimeout;
		struct dentry *dot11MeshHWMPpreqMinInterval;
		struct dentry *dot11MeshHWMPnetDiameterTraversalTime;
		struct dentry *dot11MeshHWMPmaxPREQretries;
		struct dentry *path_refresh_time;
		struct dentry *min_discovery_timeout;
	} mesh_config;
#endif

J
Jiri Benc 已提交
542
#endif
543 544
	/* must be last, dynamically sized area in this! */
	struct ieee80211_vif vif;
545 546
};

547 548 549 550 551 552
static inline
struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
{
	return container_of(p, struct ieee80211_sub_if_data, vif);
}

553 554 555 556 557 558 559 560 561 562 563 564 565
static inline void
ieee80211_sdata_set_mesh_id(struct ieee80211_sub_if_data *sdata,
			    u8 mesh_id_len, u8 *mesh_id)
{
#ifdef CONFIG_MAC80211_MESH
	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
	ifmsh->mesh_id_len = mesh_id_len;
	memcpy(ifmsh->mesh_id, mesh_id, mesh_id_len);
#else
	WARN_ON(1);
#endif
}

566 567 568
enum {
	IEEE80211_RX_MSG	= 1,
	IEEE80211_TX_STATUS_MSG	= 2,
569 570
	IEEE80211_DELBA_MSG	= 3,
	IEEE80211_ADDBA_MSG	= 4,
571 572
};

K
Kalle Valo 已提交
573 574
enum queue_stop_reason {
	IEEE80211_QUEUE_STOP_REASON_DRIVER,
575
	IEEE80211_QUEUE_STOP_REASON_PS,
S
Sujith 已提交
576
	IEEE80211_QUEUE_STOP_REASON_CSA
K
Kalle Valo 已提交
577 578
};

579 580 581
/* maximum number of hardware queues we support. */
#define QD_MAX_QUEUES (IEEE80211_MAX_AMPDU_QUEUES + IEEE80211_MAX_QUEUES)

582 583 584 585
struct ieee80211_master_priv {
	struct ieee80211_local *local;
};

586 587 588 589 590 591 592 593
struct ieee80211_local {
	/* embed the driver visible part.
	 * don't cast (use the static inlines below), but we keep
	 * it first anyway so they become a no-op */
	struct ieee80211_hw hw;

	const struct ieee80211_ops *ops;

594
	unsigned long queue_pool[BITS_TO_LONGS(QD_MAX_QUEUES)];
K
Kalle Valo 已提交
595 596
	unsigned long queue_stop_reasons[IEEE80211_MAX_QUEUES];
	spinlock_t queue_stop_reason_lock;
597 598
	struct net_device *mdev; /* wmaster# - "master" 802.11 device */
	int open_count;
599
	int monitors, cooked_mntrs;
600 601
	/* number of interfaces with corresponding FIF_ flags */
	int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss;
602
	unsigned int filter_flags; /* FIF_* */
603 604
	struct iw_statistics wstats;
	u8 wstats_flags;
605
	bool tim_in_locked_section; /* see ieee80211_beacon_get() */
606
	int tx_headroom; /* required headroom for hardware/radiotap */
607 608 609 610 611 612 613 614 615 616

	/* Tasklet and skb queue to process calls from IRQ mode. All frames
	 * added to skb_queue will be processed, but frames in
	 * skb_queue_unreliable may be dropped if the total length of these
	 * queues increases over the limit. */
#define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
	struct tasklet_struct tasklet;
	struct sk_buff_head skb_queue;
	struct sk_buff_head skb_queue_unreliable;

617 618 619 620
	/* Station data */
	/*
	 * The lock only protects the list, hash, timer and counter
	 * against manipulation, reads are done in RCU. Additionally,
J
Johannes Berg 已提交
621
	 * the lock protects each BSS's TIM bitmap.
622 623 624
	 */
	spinlock_t sta_lock;
	unsigned long num_sta;
625
	struct list_head sta_list;
J
Johannes Berg 已提交
626 627
	struct list_head sta_flush_list;
	struct work_struct sta_flush_work;
628 629 630
	struct sta_info *sta_hash[STA_HASH_SIZE];
	struct timer_list sta_cleanup;

631
	unsigned long queues_pending[BITS_TO_LONGS(IEEE80211_MAX_QUEUES)];
632
	unsigned long queues_pending_run[BITS_TO_LONGS(IEEE80211_MAX_QUEUES)];
633
	struct ieee80211_tx_stored_packet pending_packet[IEEE80211_MAX_QUEUES];
634 635
	struct tasklet_struct tx_pending_tasklet;

636 637
	/* number of interfaces with corresponding IFF_ flags */
	atomic_t iff_allmultis, iff_promiscs;
638 639 640 641 642 643 644 645 646 647

	struct rate_control_ref *rate_ctrl;

	int rts_threshold;
	int fragmentation_threshold;

	struct crypto_blkcipher *wep_tx_tfm;
	struct crypto_blkcipher *wep_rx_tfm;
	u32 wep_iv;

648
	/* see iface.c */
649
	struct list_head interfaces;
650
	struct mutex iflist_mtx;
651

J
Johannes Berg 已提交
652 653 654 655 656 657 658
	/*
	 * Key lock, protects sdata's key_list and sta_info's
	 * key pointers (write access, they're RCU.)
	 */
	spinlock_t key_lock;


659 660
	/* Scanning and BSS list */
	bool sw_scanning, hw_scanning;
661
	int scan_channel_idx;
662 663
	enum ieee80211_band scan_band;

664 665 666
	enum { SCAN_SET_CHANNEL, SCAN_SEND_PROBE } scan_state;
	unsigned long last_scan_completed;
	struct delayed_work scan_work;
667
	struct ieee80211_sub_if_data *scan_sdata;
S
Sujith 已提交
668
	struct ieee80211_channel *oper_channel, *scan_channel, *csa_channel;
S
Sujith 已提交
669
	enum nl80211_channel_type oper_channel_type;
670 671
	u8 scan_ssid[IEEE80211_MAX_SSID_LEN];
	size_t scan_ssid_len;
672 673 674
	struct list_head bss_list;
	struct ieee80211_bss *bss_hash[STA_HASH_SIZE];
	spinlock_t bss_lock;
675 676 677 678 679 680 681 682 683 684 685 686 687 688 689

	/* SNMP counters */
	/* dot11CountersTable */
	u32 dot11TransmittedFragmentCount;
	u32 dot11MulticastTransmittedFrameCount;
	u32 dot11FailedCount;
	u32 dot11RetryCount;
	u32 dot11MultipleRetryCount;
	u32 dot11FrameDuplicateCount;
	u32 dot11ReceivedFragmentCount;
	u32 dot11MulticastReceivedFrameCount;
	u32 dot11TransmittedFrameCount;

#ifdef CONFIG_MAC80211_LEDS
	int tx_led_counter, rx_led_counter;
I
Ivo van Doorn 已提交
690 691 692
	struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led;
	char tx_led_name[32], rx_led_name[32],
	     assoc_led_name[32], radio_led_name[32];
693 694
#endif

J
Jiri Benc 已提交
695 696 697 698
#ifdef CONFIG_MAC80211_DEBUGFS
	struct work_struct sta_debugfs_add;
#endif

699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730
#ifdef CONFIG_MAC80211_DEBUG_COUNTERS
	/* TX/RX handler statistics */
	unsigned int tx_handlers_drop;
	unsigned int tx_handlers_queued;
	unsigned int tx_handlers_drop_unencrypted;
	unsigned int tx_handlers_drop_fragment;
	unsigned int tx_handlers_drop_wep;
	unsigned int tx_handlers_drop_not_assoc;
	unsigned int tx_handlers_drop_unauth_port;
	unsigned int rx_handlers_drop;
	unsigned int rx_handlers_queued;
	unsigned int rx_handlers_drop_nullfunc;
	unsigned int rx_handlers_drop_defrag;
	unsigned int rx_handlers_drop_short;
	unsigned int rx_handlers_drop_passive_scan;
	unsigned int tx_expand_skb_head;
	unsigned int tx_expand_skb_head_cloned;
	unsigned int rx_expand_skb_head;
	unsigned int rx_expand_skb_head2;
	unsigned int rx_handlers_fragments;
	unsigned int tx_status_drop;
#define I802_DEBUG_INC(c) (c)++
#else /* CONFIG_MAC80211_DEBUG_COUNTERS */
#define I802_DEBUG_INC(c) do { } while (0)
#endif /* CONFIG_MAC80211_DEBUG_COUNTERS */


	int total_ps_buffered; /* total number of all buffered unicast and
				* multicast packets for power saving stations
				*/
	int wifi_wme_noack_test;
	unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */
731

732
	bool powersave;
733
	bool pspolling;
734 735 736
	struct work_struct dynamic_ps_enable_work;
	struct work_struct dynamic_ps_disable_work;
	struct timer_list dynamic_ps_timer;
737

738
	int user_power_level; /* in dBm */
739
	int power_constr_level; /* in dBm */
740

J
Jiri Benc 已提交
741 742
#ifdef CONFIG_MAC80211_DEBUGFS
	struct local_debugfsdentries {
743 744
		struct dentry *rcdir;
		struct dentry *rcname;
J
Jiri Benc 已提交
745 746 747 748 749 750 751
		struct dentry *frequency;
		struct dentry *rts_threshold;
		struct dentry *fragmentation_threshold;
		struct dentry *short_retry_limit;
		struct dentry *long_retry_limit;
		struct dentry *total_ps_buffered;
		struct dentry *wep_iv;
752
		struct dentry *tsf;
J
Jiri Benc 已提交
753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795
		struct dentry *statistics;
		struct local_debugfsdentries_statsdentries {
			struct dentry *transmitted_fragment_count;
			struct dentry *multicast_transmitted_frame_count;
			struct dentry *failed_count;
			struct dentry *retry_count;
			struct dentry *multiple_retry_count;
			struct dentry *frame_duplicate_count;
			struct dentry *received_fragment_count;
			struct dentry *multicast_received_frame_count;
			struct dentry *transmitted_frame_count;
			struct dentry *wep_undecryptable_count;
			struct dentry *num_scans;
#ifdef CONFIG_MAC80211_DEBUG_COUNTERS
			struct dentry *tx_handlers_drop;
			struct dentry *tx_handlers_queued;
			struct dentry *tx_handlers_drop_unencrypted;
			struct dentry *tx_handlers_drop_fragment;
			struct dentry *tx_handlers_drop_wep;
			struct dentry *tx_handlers_drop_not_assoc;
			struct dentry *tx_handlers_drop_unauth_port;
			struct dentry *rx_handlers_drop;
			struct dentry *rx_handlers_queued;
			struct dentry *rx_handlers_drop_nullfunc;
			struct dentry *rx_handlers_drop_defrag;
			struct dentry *rx_handlers_drop_short;
			struct dentry *rx_handlers_drop_passive_scan;
			struct dentry *tx_expand_skb_head;
			struct dentry *tx_expand_skb_head_cloned;
			struct dentry *rx_expand_skb_head;
			struct dentry *rx_expand_skb_head2;
			struct dentry *rx_handlers_fragments;
			struct dentry *tx_status_drop;
#endif
			struct dentry *dot11ACKFailureCount;
			struct dentry *dot11RTSFailureCount;
			struct dentry *dot11FCSErrorCount;
			struct dentry *dot11RTSSuccessCount;
		} stats;
		struct dentry *stations;
		struct dentry *keys;
	} debugfs;
#endif
796 797
};

798 799 800 801 802 803 804 805 806 807
static inline struct ieee80211_sub_if_data *
IEEE80211_DEV_TO_SUB_IF(struct net_device *dev)
{
	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);

	BUG_ON(!local || local->mdev == dev);

	return netdev_priv(dev);
}

808 809 810 811 812 813
/* this struct represents 802.11n's RA/TID combination */
struct ieee80211_ra_tid {
	u8 ra[ETH_ALEN];
	u16 tid;
};

814 815
/* Parsed Information Elements */
struct ieee802_11_elems {
816 817 818
	u8 *ie_start;
	size_t total_len;

819 820 821 822 823 824 825 826 827 828 829 830 831 832 833
	/* pointers to IEs */
	u8 *ssid;
	u8 *supp_rates;
	u8 *fh_params;
	u8 *ds_params;
	u8 *cf_params;
	u8 *tim;
	u8 *ibss_params;
	u8 *challenge;
	u8 *wpa;
	u8 *rsn;
	u8 *erp_info;
	u8 *ext_supp_rates;
	u8 *wmm_info;
	u8 *wmm_param;
834
	struct ieee80211_ht_cap *ht_cap_elem;
J
Johannes Berg 已提交
835
	struct ieee80211_ht_info *ht_info_elem;
836 837 838 839 840 841
	u8 *mesh_config;
	u8 *mesh_id;
	u8 *peer_link;
	u8 *preq;
	u8 *prep;
	u8 *perr;
842 843 844 845
	u8 *ch_switch_elem;
	u8 *country_elem;
	u8 *pwr_constr_elem;
	u8 *quiet_elem; 	/* first quite element */
846
	u8 *timeout_int;
847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868

	/* length of them, respectively */
	u8 ssid_len;
	u8 supp_rates_len;
	u8 fh_params_len;
	u8 ds_params_len;
	u8 cf_params_len;
	u8 tim_len;
	u8 ibss_params_len;
	u8 challenge_len;
	u8 wpa_len;
	u8 rsn_len;
	u8 erp_info_len;
	u8 ext_supp_rates_len;
	u8 wmm_info_len;
	u8 wmm_param_len;
	u8 mesh_config_len;
	u8 mesh_id_len;
	u8 peer_link_len;
	u8 preq_len;
	u8 prep_len;
	u8 perr_len;
869 870 871 872 873
	u8 ch_switch_elem_len;
	u8 country_elem_len;
	u8 pwr_constr_elem_len;
	u8 quiet_elem_len;
	u8 num_of_quiet_elem;	/* can be more the one */
874
	u8 timeout_int_len;
875 876
};

877 878 879 880 881 882 883 884 885 886 887 888 889
static inline struct ieee80211_local *hw_to_local(
	struct ieee80211_hw *hw)
{
	return container_of(hw, struct ieee80211_local, hw);
}

static inline struct ieee80211_hw *local_to_hw(
	struct ieee80211_local *local)
{
	return &local->hw;
}


890 891 892 893 894 895 896
static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
{
	return compare_ether_addr(raddr, addr) == 0 ||
	       is_broadcast_ether_addr(raddr);
}


897
int ieee80211_hw_config(struct ieee80211_local *local, u32 changed);
898
int ieee80211_if_config(struct ieee80211_sub_if_data *sdata, u32 changed);
899
void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
J
Johannes Berg 已提交
900 901
void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
				      u32 changed);
902
void ieee80211_configure_filter(struct ieee80211_local *local);
903

J
Johannes Berg 已提交
904
/* wireless extensions */
905
extern const struct iw_handler_def ieee80211_iw_handler_def;
906

J
Johannes Berg 已提交
907 908
/* STA/IBSS code */
void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata);
909
void ieee80211_scan_work(struct work_struct *work);
910
void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
911
			   struct ieee80211_rx_status *rx_status);
912 913 914 915
int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len);
int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len);
int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid);
void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
916
			    struct ieee80211_if_sta *ifsta);
917
struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
918
					u8 *bssid, u8 *addr, u32 supp_rates);
919 920 921
int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason);
int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason);
u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
922
u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
923 924
			    struct ieee802_11_elems *elems,
			    enum ieee80211_band band);
925 926
void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
			      u8 *ssid, size_t ssid_len);
927 928
void ieee80211_send_pspoll(struct ieee80211_local *local,
			   struct ieee80211_sub_if_data *sdata);
J
Johannes Berg 已提交
929 930

/* scan/BSS handling */
931 932 933 934 935 936 937 938 939
int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
			   u8 *ssid, size_t ssid_len);
int ieee80211_scan_results(struct ieee80211_local *local,
			   struct iw_request_info *info,
			   char *buf, size_t len);
ieee80211_rx_result
ieee80211_scan_rx(struct ieee80211_sub_if_data *sdata,
		  struct sk_buff *skb,
		  struct ieee80211_rx_status *rx_status);
J
Johannes Berg 已提交
940 941
void ieee80211_rx_bss_list_init(struct ieee80211_local *local);
void ieee80211_rx_bss_list_deinit(struct ieee80211_local *local);
942 943
int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata,
			       char *ie, size_t len);
J
Johannes Berg 已提交
944

945
void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local);
946 947 948
int ieee80211_start_scan(struct ieee80211_sub_if_data *scan_sdata,
			 u8 *ssid, size_t ssid_len);
struct ieee80211_bss *
949 950 951 952 953 954
ieee80211_bss_info_update(struct ieee80211_local *local,
			  struct ieee80211_rx_status *rx_status,
			  struct ieee80211_mgmt *mgmt,
			  size_t len,
			  struct ieee802_11_elems *elems,
			  int freq, bool beacon);
955
struct ieee80211_bss *
956 957
ieee80211_rx_bss_add(struct ieee80211_local *local, u8 *bssid, int freq,
		     u8 *ssid, u8 ssid_len);
958
struct ieee80211_bss *
959 960
ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq,
		     u8 *ssid, u8 ssid_len);
961
void ieee80211_rx_bss_put(struct ieee80211_local *local,
962
			  struct ieee80211_bss *bss);
963 964
void ieee80211_rx_bss_remove(struct ieee80211_sub_if_data *sdata, u8 *bssid,
			     int freq, u8 *ssid, u8 ssid_len);
965

966 967
/* interface handling */
int ieee80211_if_add(struct ieee80211_local *local, const char *name,
968
		     struct net_device **new_dev, enum nl80211_iftype type,
969
		     struct vif_params *params);
970
int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
971
			     enum nl80211_iftype type);
972
void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata);
973
void ieee80211_remove_interfaces(struct ieee80211_local *local);
974

975 976 977 978 979 980 981
/* tx handling */
void ieee80211_clear_tx_pending(struct ieee80211_local *local);
void ieee80211_tx_pending(unsigned long data);
int ieee80211_master_start_xmit(struct sk_buff *skb, struct net_device *dev);
int ieee80211_monitor_start_xmit(struct sk_buff *skb, struct net_device *dev);
int ieee80211_subif_start_xmit(struct sk_buff *skb, struct net_device *dev);

982
/* HT */
J
Johannes Berg 已提交
983 984
void ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_supported_band *sband,
				       struct ieee80211_ht_cap *ht_cap_ie,
J
Johannes Berg 已提交
985
				       struct ieee80211_sta_ht_cap *ht_cap);
J
Johannes Berg 已提交
986 987 988
u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
			struct ieee80211_ht_info *hti,
			u16 ap_ht_cap_flags);
989
void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn);
J
Johannes Berg 已提交
990 991 992
void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
			  const u8 *da, u16 tid,
			  u16 initiator, u16 reason_code);
993 994 995

void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data *sdata, u8 *da,
				u16 tid, u16 initiator, u16 reason);
996
void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta);
997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008
void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
			     struct sta_info *sta,
			     struct ieee80211_mgmt *mgmt, size_t len);
void ieee80211_process_addba_resp(struct ieee80211_local *local,
				  struct sta_info *sta,
				  struct ieee80211_mgmt *mgmt,
				  size_t len);
void ieee80211_process_addba_request(struct ieee80211_local *local,
				     struct sta_info *sta,
				     struct ieee80211_mgmt *mgmt,
				     size_t len);

1009 1010 1011 1012
/* Spectrum management */
void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata,
				       struct ieee80211_mgmt *mgmt,
				       size_t len);
S
Sujith 已提交
1013 1014 1015 1016 1017
void ieee80211_chswitch_timer(unsigned long data);
void ieee80211_chswitch_work(struct work_struct *work);
void ieee80211_process_chanswitch(struct ieee80211_sub_if_data *sdata,
				  struct ieee80211_channel_sw_ie *sw_elem,
				  struct ieee80211_bss *bss);
1018 1019 1020
void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
				 u16 capab_info, u8 *pwr_constr_elem,
				 u8 pwr_constr_elem_len);
1021

1022 1023 1024 1025
/* Suspend/resume */
int __ieee80211_suspend(struct ieee80211_hw *hw);
int __ieee80211_resume(struct ieee80211_hw *hw);

J
Johannes Berg 已提交
1026 1027 1028 1029
/* utility functions/constants */
extern void *mac80211_wiphy_privid; /* for wiphy privid */
extern const unsigned char rfc1042_header[6];
extern const unsigned char bridge_tunnel_header[6];
1030
u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
1031
			enum nl80211_iftype type);
J
Johannes Berg 已提交
1032 1033
int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
			     int rate, int erp, int short_preamble);
1034
void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx,
J
Johannes Berg 已提交
1035
				     struct ieee80211_hdr *hdr);
1036
void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata);
J
Johannes Berg 已提交
1037 1038
void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
		      int encrypt);
J
Johannes Berg 已提交
1039 1040
void ieee802_11_parse_elems(u8 *start, size_t len,
			    struct ieee802_11_elems *elems);
1041
int ieee80211_set_freq(struct ieee80211_sub_if_data *sdata, int freq);
1042
u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
1043
			      enum ieee80211_band band);
1044

1045 1046 1047
void ieee80211_dynamic_ps_enable_work(struct work_struct *work);
void ieee80211_dynamic_ps_disable_work(struct work_struct *work);
void ieee80211_dynamic_ps_timer(unsigned long data);
1048 1049 1050
void ieee80211_send_nullfunc(struct ieee80211_local *local,
			     struct ieee80211_sub_if_data *sdata,
			     int powersave);
1051

K
Kalle Valo 已提交
1052 1053 1054 1055 1056
void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
				     enum queue_stop_reason reason);
void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
				     enum queue_stop_reason reason);

1057
#ifdef CONFIG_MAC80211_NOINLINE
1058 1059 1060 1061 1062
#define debug_noinline noinline
#else
#define debug_noinline
#endif

1063
#endif /* IEEE80211_I_H */