tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Merged with mainline ieee80211.h in Aug 2004. Original ieee802_11
3 * remains copyright by the original authors
4 *
5 * Portions of the merged code are based on Host AP (software wireless
6 * LAN access point) driver for Intersil Prism2/2.5/3.
7 *
8 * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
9 * <jkmaline@cc.hut.fi>
10 * Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi>
11 *
12 * Adaption to a generic IEEE 802.11 stack by James Ketrenos
13 * <jketreno@linux.intel.com>
14 * Copyright (c) 2004, Intel Corporation
15 *
16 * This program is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License version 2 as
18 * published by the Free Software Foundation. See README and COPYING for
19 * more details.
20 */
21#ifndef IEEE80211_H
22#define IEEE80211_H
23#include <linux/if_ether.h> /* ETH_ALEN */
24#include <linux/kernel.h> /* ARRAY_SIZE */
25#include <linux/wireless.h>
26
27#define IEEE80211_DATA_LEN 2304
28/* Maximum size for the MA-UNITDATA primitive, 802.11 standard section
29 6.2.1.1.2.
30
31 The figure in section 7.1.2 suggests a body size of up to 2312
32 bytes is allowed, which is a bit confusing, I suspect this
33 represents the 2304 bytes of real data, plus a possible 8 bytes of
34 WEP IV and ICV. (this interpretation suggested by Ramiro Barreiro) */
35
36
37#define IEEE80211_HLEN 30
38#define IEEE80211_FRAME_LEN (IEEE80211_DATA_LEN + IEEE80211_HLEN)
39
40struct ieee80211_hdr {
41 __le16 frame_ctl;
42 __le16 duration_id;
43 u8 addr1[ETH_ALEN];
44 u8 addr2[ETH_ALEN];
45 u8 addr3[ETH_ALEN];
46 __le16 seq_ctl;
47 u8 addr4[ETH_ALEN];
48} __attribute__ ((packed));
49
50struct ieee80211_hdr_3addr {
51 __le16 frame_ctl;
52 __le16 duration_id;
53 u8 addr1[ETH_ALEN];
54 u8 addr2[ETH_ALEN];
55 u8 addr3[ETH_ALEN];
56 __le16 seq_ctl;
57} __attribute__ ((packed));
58
59#define IEEE80211_1ADDR_LEN 10
60#define IEEE80211_2ADDR_LEN 16
61#define IEEE80211_3ADDR_LEN 24
62#define IEEE80211_4ADDR_LEN 30
63#define IEEE80211_FCS_LEN 4
64
65#define MIN_FRAG_THRESHOLD 256U
66#define MAX_FRAG_THRESHOLD 2346U
67
68/* Frame control field constants */
69#define IEEE80211_FCTL_VERS 0x0003
70#define IEEE80211_FCTL_FTYPE 0x000c
71#define IEEE80211_FCTL_STYPE 0x00f0
72#define IEEE80211_FCTL_TODS 0x0100
73#define IEEE80211_FCTL_FROMDS 0x0200
74#define IEEE80211_FCTL_MOREFRAGS 0x0400
75#define IEEE80211_FCTL_RETRY 0x0800
76#define IEEE80211_FCTL_PM 0x1000
77#define IEEE80211_FCTL_MOREDATA 0x2000
78#define IEEE80211_FCTL_PROTECTED 0x4000
79#define IEEE80211_FCTL_ORDER 0x8000
80
81#define IEEE80211_FTYPE_MGMT 0x0000
82#define IEEE80211_FTYPE_CTL 0x0004
83#define IEEE80211_FTYPE_DATA 0x0008
84
85/* management */
86#define IEEE80211_STYPE_ASSOC_REQ 0x0000
87#define IEEE80211_STYPE_ASSOC_RESP 0x0010
88#define IEEE80211_STYPE_REASSOC_REQ 0x0020
89#define IEEE80211_STYPE_REASSOC_RESP 0x0030
90#define IEEE80211_STYPE_PROBE_REQ 0x0040
91#define IEEE80211_STYPE_PROBE_RESP 0x0050
92#define IEEE80211_STYPE_BEACON 0x0080
93#define IEEE80211_STYPE_ATIM 0x0090
94#define IEEE80211_STYPE_DISASSOC 0x00A0
95#define IEEE80211_STYPE_AUTH 0x00B0
96#define IEEE80211_STYPE_DEAUTH 0x00C0
97#define IEEE80211_STYPE_ACTION 0x00D0
98
99/* control */
100#define IEEE80211_STYPE_PSPOLL 0x00A0
101#define IEEE80211_STYPE_RTS 0x00B0
102#define IEEE80211_STYPE_CTS 0x00C0
103#define IEEE80211_STYPE_ACK 0x00D0
104#define IEEE80211_STYPE_CFEND 0x00E0
105#define IEEE80211_STYPE_CFENDACK 0x00F0
106
107/* data */
108#define IEEE80211_STYPE_DATA 0x0000
109#define IEEE80211_STYPE_DATA_CFACK 0x0010
110#define IEEE80211_STYPE_DATA_CFPOLL 0x0020
111#define IEEE80211_STYPE_DATA_CFACKPOLL 0x0030
112#define IEEE80211_STYPE_NULLFUNC 0x0040
113#define IEEE80211_STYPE_CFACK 0x0050
114#define IEEE80211_STYPE_CFPOLL 0x0060
115#define IEEE80211_STYPE_CFACKPOLL 0x0070
116
117#define IEEE80211_SCTL_FRAG 0x000F
118#define IEEE80211_SCTL_SEQ 0xFFF0
119
120
121/* debug macros */
122
123#ifdef CONFIG_IEEE80211_DEBUG
124extern u32 ieee80211_debug_level;
125#define IEEE80211_DEBUG(level, fmt, args...) \
126do { if (ieee80211_debug_level & (level)) \
127 printk(KERN_DEBUG "ieee80211: %c %s " fmt, \
128 in_interrupt() ? 'I' : 'U', __FUNCTION__ , ## args); } while (0)
129#else
130#define IEEE80211_DEBUG(level, fmt, args...) do {} while (0)
131#endif /* CONFIG_IEEE80211_DEBUG */
132
133
134/* debug macros not dependent on CONFIG_IEEE80211_DEBUG */
135
136#define MAC_FMT "%02x:%02x:%02x:%02x:%02x:%02x"
137#define MAC_ARG(x) ((u8*)(x))[0],((u8*)(x))[1],((u8*)(x))[2],((u8*)(x))[3],((u8*)(x))[4],((u8*)(x))[5]
138
139/* escape_essid() is intended to be used in debug (and possibly error)
140 * messages. It should never be used for passing essid to user space. */
141const char *escape_essid(const char *essid, u8 essid_len);
142
143
144/*
145 * To use the debug system:
146 *
147 * If you are defining a new debug classification, simply add it to the #define
148 * list here in the form of:
149 *
150 * #define IEEE80211_DL_xxxx VALUE
151 *
152 * shifting value to the left one bit from the previous entry. xxxx should be
153 * the name of the classification (for example, WEP)
154 *
155 * You then need to either add a IEEE80211_xxxx_DEBUG() macro definition for your
156 * classification, or use IEEE80211_DEBUG(IEEE80211_DL_xxxx, ...) whenever you want
157 * to send output to that classification.
158 *
159 * To add your debug level to the list of levels seen when you perform
160 *
161 * % cat /proc/net/ieee80211/debug_level
162 *
163 * you simply need to add your entry to the ieee80211_debug_level array.
164 *
165 * If you do not see debug_level in /proc/net/ieee80211 then you do not have
166 * CONFIG_IEEE80211_DEBUG defined in your kernel configuration
167 *
168 */
169
170#define IEEE80211_DL_INFO (1<<0)
171#define IEEE80211_DL_WX (1<<1)
172#define IEEE80211_DL_SCAN (1<<2)
173#define IEEE80211_DL_STATE (1<<3)
174#define IEEE80211_DL_MGMT (1<<4)
175#define IEEE80211_DL_FRAG (1<<5)
176#define IEEE80211_DL_DROP (1<<7)
177
178#define IEEE80211_DL_TX (1<<8)
179#define IEEE80211_DL_RX (1<<9)
180
181#define IEEE80211_ERROR(f, a...) printk(KERN_ERR "ieee80211: " f, ## a)
182#define IEEE80211_WARNING(f, a...) printk(KERN_WARNING "ieee80211: " f, ## a)
183#define IEEE80211_DEBUG_INFO(f, a...) IEEE80211_DEBUG(IEEE80211_DL_INFO, f, ## a)
184
185#define IEEE80211_DEBUG_WX(f, a...) IEEE80211_DEBUG(IEEE80211_DL_WX, f, ## a)
186#define IEEE80211_DEBUG_SCAN(f, a...) IEEE80211_DEBUG(IEEE80211_DL_SCAN, f, ## a)
187#define IEEE80211_DEBUG_STATE(f, a...) IEEE80211_DEBUG(IEEE80211_DL_STATE, f, ## a)
188#define IEEE80211_DEBUG_MGMT(f, a...) IEEE80211_DEBUG(IEEE80211_DL_MGMT, f, ## a)
189#define IEEE80211_DEBUG_FRAG(f, a...) IEEE80211_DEBUG(IEEE80211_DL_FRAG, f, ## a)
190#define IEEE80211_DEBUG_DROP(f, a...) IEEE80211_DEBUG(IEEE80211_DL_DROP, f, ## a)
191#define IEEE80211_DEBUG_TX(f, a...) IEEE80211_DEBUG(IEEE80211_DL_TX, f, ## a)
192#define IEEE80211_DEBUG_RX(f, a...) IEEE80211_DEBUG(IEEE80211_DL_RX, f, ## a)
193#include <linux/netdevice.h>
194#include <linux/wireless.h>
195#include <linux/if_arp.h> /* ARPHRD_ETHER */
196
197#ifndef WIRELESS_SPY
198#define WIRELESS_SPY /* enable iwspy support */
199#endif
200#include <net/iw_handler.h> /* new driver API */
201
202#ifndef ETH_P_PAE
203#define ETH_P_PAE 0x888E /* Port Access Entity (IEEE 802.1X) */
204#endif /* ETH_P_PAE */
205
206#define ETH_P_PREAUTH 0x88C7 /* IEEE 802.11i pre-authentication */
207
208#ifndef ETH_P_80211_RAW
209#define ETH_P_80211_RAW (ETH_P_ECONET + 1)
210#endif
211
212/* IEEE 802.11 defines */
213
214#define P80211_OUI_LEN 3
215
216struct ieee80211_snap_hdr {
217
218 u8 dsap; /* always 0xAA */
219 u8 ssap; /* always 0xAA */
220 u8 ctrl; /* always 0x03 */
221 u8 oui[P80211_OUI_LEN]; /* organizational universal id */
222
223} __attribute__ ((packed));
224
225#define SNAP_SIZE sizeof(struct ieee80211_snap_hdr)
226
227#define WLAN_FC_GET_VERS(fc) ((fc) & IEEE80211_FCTL_VERS)
228#define WLAN_FC_GET_TYPE(fc) ((fc) & IEEE80211_FCTL_FTYPE)
229#define WLAN_FC_GET_STYPE(fc) ((fc) & IEEE80211_FCTL_STYPE)
230
231#define WLAN_GET_SEQ_FRAG(seq) ((seq) & IEEE80211_SCTL_FRAG)
232#define WLAN_GET_SEQ_SEQ(seq) ((seq) & IEEE80211_SCTL_SEQ)
233
234/* Authentication algorithms */
235#define WLAN_AUTH_OPEN 0
236#define WLAN_AUTH_SHARED_KEY 1
237
238#define WLAN_AUTH_CHALLENGE_LEN 128
239
240#define WLAN_CAPABILITY_ESS (1<<0)
241#define WLAN_CAPABILITY_IBSS (1<<1)
242#define WLAN_CAPABILITY_CF_POLLABLE (1<<2)
243#define WLAN_CAPABILITY_CF_POLL_REQUEST (1<<3)
244#define WLAN_CAPABILITY_PRIVACY (1<<4)
245#define WLAN_CAPABILITY_SHORT_PREAMBLE (1<<5)
246#define WLAN_CAPABILITY_PBCC (1<<6)
247#define WLAN_CAPABILITY_CHANNEL_AGILITY (1<<7)
248#define WLAN_CAPABILITY_SPECTRUM_MGMT (1<<8)
249#define WLAN_CAPABILITY_SHORT_SLOT_TIME (1<<10)
250#define WLAN_CAPABILITY_OSSS_OFDM (1<<13)
251
252/* Status codes */
253enum ieee80211_statuscode {
254 WLAN_STATUS_SUCCESS = 0,
255 WLAN_STATUS_UNSPECIFIED_FAILURE = 1,
256 WLAN_STATUS_CAPS_UNSUPPORTED = 10,
257 WLAN_STATUS_REASSOC_NO_ASSOC = 11,
258 WLAN_STATUS_ASSOC_DENIED_UNSPEC = 12,
259 WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG = 13,
260 WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION = 14,
261 WLAN_STATUS_CHALLENGE_FAIL = 15,
262 WLAN_STATUS_AUTH_TIMEOUT = 16,
263 WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA = 17,
264 WLAN_STATUS_ASSOC_DENIED_RATES = 18,
265 /* 802.11b */
266 WLAN_STATUS_ASSOC_DENIED_NOSHORTPREAMBLE = 19,
267 WLAN_STATUS_ASSOC_DENIED_NOPBCC = 20,
268 WLAN_STATUS_ASSOC_DENIED_NOAGILITY = 21,
269 /* 802.11h */
270 WLAN_STATUS_ASSOC_DENIED_NOSPECTRUM = 22,
271 WLAN_STATUS_ASSOC_REJECTED_BAD_POWER = 23,
272 WLAN_STATUS_ASSOC_REJECTED_BAD_SUPP_CHAN = 24,
273 /* 802.11g */
274 WLAN_STATUS_ASSOC_DENIED_NOSHORTTIME = 25,
275 WLAN_STATUS_ASSOC_DENIED_NODSSSOFDM = 26,
276 /* 802.11i */
277 WLAN_STATUS_INVALID_IE = 40,
278 WLAN_STATUS_INVALID_GROUP_CIPHER = 41,
279 WLAN_STATUS_INVALID_PAIRWISE_CIPHER = 42,
280 WLAN_STATUS_INVALID_AKMP = 43,
281 WLAN_STATUS_UNSUPP_RSN_VERSION = 44,
282 WLAN_STATUS_INVALID_RSN_IE_CAP = 45,
283 WLAN_STATUS_CIPHER_SUITE_REJECTED = 46,
284};
285
286/* Reason codes */
287enum ieee80211_reasoncode {
288 WLAN_REASON_UNSPECIFIED = 1,
289 WLAN_REASON_PREV_AUTH_NOT_VALID = 2,
290 WLAN_REASON_DEAUTH_LEAVING = 3,
291 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY = 4,
292 WLAN_REASON_DISASSOC_AP_BUSY = 5,
293 WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA = 6,
294 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA = 7,
295 WLAN_REASON_DISASSOC_STA_HAS_LEFT = 8,
296 WLAN_REASON_STA_REQ_ASSOC_WITHOUT_AUTH = 9,
297 /* 802.11h */
298 WLAN_REASON_DISASSOC_BAD_POWER = 10,
299 WLAN_REASON_DISASSOC_BAD_SUPP_CHAN = 11,
300 /* 802.11i */
301 WLAN_REASON_INVALID_IE = 13,
302 WLAN_REASON_MIC_FAILURE = 14,
303 WLAN_REASON_4WAY_HANDSHAKE_TIMEOUT = 15,
304 WLAN_REASON_GROUP_KEY_HANDSHAKE_TIMEOUT = 16,
305 WLAN_REASON_IE_DIFFERENT = 17,
306 WLAN_REASON_INVALID_GROUP_CIPHER = 18,
307 WLAN_REASON_INVALID_PAIRWISE_CIPHER = 19,
308 WLAN_REASON_INVALID_AKMP = 20,
309 WLAN_REASON_UNSUPP_RSN_VERSION = 21,
310 WLAN_REASON_INVALID_RSN_IE_CAP = 22,
311 WLAN_REASON_IEEE8021X_FAILED = 23,
312 WLAN_REASON_CIPHER_SUITE_REJECTED = 24,
313};
314
315
316#define IEEE80211_STATMASK_SIGNAL (1<<0)
317#define IEEE80211_STATMASK_RSSI (1<<1)
318#define IEEE80211_STATMASK_NOISE (1<<2)
319#define IEEE80211_STATMASK_RATE (1<<3)
320#define IEEE80211_STATMASK_WEMASK 0x7
321
322
323#define IEEE80211_CCK_MODULATION (1<<0)
324#define IEEE80211_OFDM_MODULATION (1<<1)
325
326#define IEEE80211_24GHZ_BAND (1<<0)
327#define IEEE80211_52GHZ_BAND (1<<1)
328
329#define IEEE80211_CCK_RATE_1MB 0x02
330#define IEEE80211_CCK_RATE_2MB 0x04
331#define IEEE80211_CCK_RATE_5MB 0x0B
332#define IEEE80211_CCK_RATE_11MB 0x16
333#define IEEE80211_OFDM_RATE_6MB 0x0C
334#define IEEE80211_OFDM_RATE_9MB 0x12
335#define IEEE80211_OFDM_RATE_12MB 0x18
336#define IEEE80211_OFDM_RATE_18MB 0x24
337#define IEEE80211_OFDM_RATE_24MB 0x30
338#define IEEE80211_OFDM_RATE_36MB 0x48
339#define IEEE80211_OFDM_RATE_48MB 0x60
340#define IEEE80211_OFDM_RATE_54MB 0x6C
341#define IEEE80211_BASIC_RATE_MASK 0x80
342
343#define IEEE80211_CCK_RATE_1MB_MASK (1<<0)
344#define IEEE80211_CCK_RATE_2MB_MASK (1<<1)
345#define IEEE80211_CCK_RATE_5MB_MASK (1<<2)
346#define IEEE80211_CCK_RATE_11MB_MASK (1<<3)
347#define IEEE80211_OFDM_RATE_6MB_MASK (1<<4)
348#define IEEE80211_OFDM_RATE_9MB_MASK (1<<5)
349#define IEEE80211_OFDM_RATE_12MB_MASK (1<<6)
350#define IEEE80211_OFDM_RATE_18MB_MASK (1<<7)
351#define IEEE80211_OFDM_RATE_24MB_MASK (1<<8)
352#define IEEE80211_OFDM_RATE_36MB_MASK (1<<9)
353#define IEEE80211_OFDM_RATE_48MB_MASK (1<<10)
354#define IEEE80211_OFDM_RATE_54MB_MASK (1<<11)
355
356#define IEEE80211_CCK_RATES_MASK 0x0000000F
357#define IEEE80211_CCK_BASIC_RATES_MASK (IEEE80211_CCK_RATE_1MB_MASK | \
358 IEEE80211_CCK_RATE_2MB_MASK)
359#define IEEE80211_CCK_DEFAULT_RATES_MASK (IEEE80211_CCK_BASIC_RATES_MASK | \
360 IEEE80211_CCK_RATE_5MB_MASK | \
361 IEEE80211_CCK_RATE_11MB_MASK)
362
363#define IEEE80211_OFDM_RATES_MASK 0x00000FF0
364#define IEEE80211_OFDM_BASIC_RATES_MASK (IEEE80211_OFDM_RATE_6MB_MASK | \
365 IEEE80211_OFDM_RATE_12MB_MASK | \
366 IEEE80211_OFDM_RATE_24MB_MASK)
367#define IEEE80211_OFDM_DEFAULT_RATES_MASK (IEEE80211_OFDM_BASIC_RATES_MASK | \
368 IEEE80211_OFDM_RATE_9MB_MASK | \
369 IEEE80211_OFDM_RATE_18MB_MASK | \
370 IEEE80211_OFDM_RATE_36MB_MASK | \
371 IEEE80211_OFDM_RATE_48MB_MASK | \
372 IEEE80211_OFDM_RATE_54MB_MASK)
373#define IEEE80211_DEFAULT_RATES_MASK (IEEE80211_OFDM_DEFAULT_RATES_MASK | \
374 IEEE80211_CCK_DEFAULT_RATES_MASK)
375
376#define IEEE80211_NUM_OFDM_RATES 8
377#define IEEE80211_NUM_CCK_RATES 4
378#define IEEE80211_OFDM_SHIFT_MASK_A 4
379
380
381
382
383/* NOTE: This data is for statistical purposes; not all hardware provides this
384 * information for frames received. Not setting these will not cause
385 * any adverse affects. */
386struct ieee80211_rx_stats {
387 u32 mac_time;
388 s8 rssi;
389 u8 signal;
390 u8 noise;
391 u16 rate; /* in 100 kbps */
392 u8 received_channel;
393 u8 control;
394 u8 mask;
395 u8 freq;
396 u16 len;
397};
398
399/* IEEE 802.11 requires that STA supports concurrent reception of at least
400 * three fragmented frames. This define can be increased to support more
401 * concurrent frames, but it should be noted that each entry can consume about
402 * 2 kB of RAM and increasing cache size will slow down frame reassembly. */
403#define IEEE80211_FRAG_CACHE_LEN 4
404
405struct ieee80211_frag_entry {
406 unsigned long first_frag_time;
407 unsigned int seq;
408 unsigned int last_frag;
409 struct sk_buff *skb;
410 u8 src_addr[ETH_ALEN];
411 u8 dst_addr[ETH_ALEN];
412};
413
414struct ieee80211_stats {
415 unsigned int tx_unicast_frames;
416 unsigned int tx_multicast_frames;
417 unsigned int tx_fragments;
418 unsigned int tx_unicast_octets;
419 unsigned int tx_multicast_octets;
420 unsigned int tx_deferred_transmissions;
421 unsigned int tx_single_retry_frames;
422 unsigned int tx_multiple_retry_frames;
423 unsigned int tx_retry_limit_exceeded;
424 unsigned int tx_discards;
425 unsigned int rx_unicast_frames;
426 unsigned int rx_multicast_frames;
427 unsigned int rx_fragments;
428 unsigned int rx_unicast_octets;
429 unsigned int rx_multicast_octets;
430 unsigned int rx_fcs_errors;
431 unsigned int rx_discards_no_buffer;
432 unsigned int tx_discards_wrong_sa;
433 unsigned int rx_discards_undecryptable;
434 unsigned int rx_message_in_msg_fragments;
435 unsigned int rx_message_in_bad_msg_fragments;
436};
437
438struct ieee80211_device;
439
440#include "ieee80211_crypt.h"
441
442#define SEC_KEY_1 (1<<0)
443#define SEC_KEY_2 (1<<1)
444#define SEC_KEY_3 (1<<2)
445#define SEC_KEY_4 (1<<3)
446#define SEC_ACTIVE_KEY (1<<4)
447#define SEC_AUTH_MODE (1<<5)
448#define SEC_UNICAST_GROUP (1<<6)
449#define SEC_LEVEL (1<<7)
450#define SEC_ENABLED (1<<8)
451
452#define SEC_LEVEL_0 0 /* None */
453#define SEC_LEVEL_1 1 /* WEP 40 and 104 bit */
454#define SEC_LEVEL_2 2 /* Level 1 + TKIP */
455#define SEC_LEVEL_2_CKIP 3 /* Level 1 + CKIP */
456#define SEC_LEVEL_3 4 /* Level 2 + CCMP */
457
458#define WEP_KEYS 4
459#define WEP_KEY_LEN 13
460
461struct ieee80211_security {
462 u16 active_key:2,
463 enabled:1,
464 auth_mode:2,
465 auth_algo:4,
466 unicast_uses_group:1;
467 u8 key_sizes[WEP_KEYS];
468 u8 keys[WEP_KEYS][WEP_KEY_LEN];
469 u8 level;
470 u16 flags;
471} __attribute__ ((packed));
472
473
474/*
475
476 802.11 data frame from AP
477
478 ,-------------------------------------------------------------------.
479Bytes | 2 | 2 | 6 | 6 | 6 | 2 | 0..2312 | 4 |
480 |------|------|---------|---------|---------|------|---------|------|
481Desc. | ctrl | dura | DA/RA | TA | SA | Sequ | frame | fcs |
482 | | tion | (BSSID) | | | ence | data | |
483 `-------------------------------------------------------------------'
484
485Total: 28-2340 bytes
486
487*/
488
489#define BEACON_PROBE_SSID_ID_POSITION 12
490
491/* Management Frame Information Element Types */
492enum ieee80211_mfie {
493 MFIE_TYPE_SSID = 0,
494 MFIE_TYPE_RATES = 1,
495 MFIE_TYPE_FH_SET = 2,
496 MFIE_TYPE_DS_SET = 3,
497 MFIE_TYPE_CF_SET = 4,
498 MFIE_TYPE_TIM = 5,
499 MFIE_TYPE_IBSS_SET = 6,
500 MFIE_TYPE_COUNTRY = 7,
501 MFIE_TYPE_HOP_PARAMS = 8,
502 MFIE_TYPE_HOP_TABLE = 9,
503 MFIE_TYPE_REQUEST = 10,
504 MFIE_TYPE_CHALLENGE = 16,
505 MFIE_TYPE_POWER_CONSTRAINT = 32,
506 MFIE_TYPE_POWER_CAPABILITY = 33,
507 MFIE_TYPE_TPC_REQUEST = 34,
508 MFIE_TYPE_TPC_REPORT = 35,
509 MFIE_TYPE_SUPP_CHANNELS = 36,
510 MFIE_TYPE_CSA = 37,
511 MFIE_TYPE_MEASURE_REQUEST = 38,
512 MFIE_TYPE_MEASURE_REPORT = 39,
513 MFIE_TYPE_QUIET = 40,
514 MFIE_TYPE_IBSS_DFS = 41,
515 MFIE_TYPE_ERP_INFO = 42,
516 MFIE_TYPE_RSN = 48,
517 MFIE_TYPE_RATES_EX = 50,
518 MFIE_TYPE_GENERIC = 221,
519};
520
521struct ieee80211_info_element_hdr {
522 u8 id;
523 u8 len;
524} __attribute__ ((packed));
525
526struct ieee80211_info_element {
527 u8 id;
528 u8 len;
529 u8 data[0];
530} __attribute__ ((packed));
531
532/*
533 * These are the data types that can make up management packets
534 *
535 u16 auth_algorithm;
536 u16 auth_sequence;
537 u16 beacon_interval;
538 u16 capability;
539 u8 current_ap[ETH_ALEN];
540 u16 listen_interval;
541 struct {
542 u16 association_id:14, reserved:2;
543 } __attribute__ ((packed));
544 u32 time_stamp[2];
545 u16 reason;
546 u16 status;
547*/
548
549struct ieee80211_authentication {
550 struct ieee80211_hdr_3addr header;
551 __le16 algorithm;
552 __le16 transaction;
553 __le16 status;
554 struct ieee80211_info_element info_element;
555} __attribute__ ((packed));
556
557
558struct ieee80211_probe_response {
559 struct ieee80211_hdr_3addr header;
560 u32 time_stamp[2];
561 __le16 beacon_interval;
562 __le16 capability;
563 struct ieee80211_info_element info_element;
564} __attribute__ ((packed));
565
566struct ieee80211_assoc_request_frame {
567 __le16 capability;
568 __le16 listen_interval;
569 u8 current_ap[ETH_ALEN];
570 struct ieee80211_info_element info_element;
571} __attribute__ ((packed));
572
573struct ieee80211_assoc_response_frame {
574 struct ieee80211_hdr_3addr header;
575 __le16 capability;
576 __le16 status;
577 __le16 aid;
578 struct ieee80211_info_element info_element; /* supported rates */
579} __attribute__ ((packed));
580
581
582struct ieee80211_txb {
583 u8 nr_frags;
584 u8 encrypted;
585 u16 reserved;
586 u16 frag_size;
587 u16 payload_size;
588 struct sk_buff *fragments[0];
589};
590
591
592/* SWEEP TABLE ENTRIES NUMBER */
593#define MAX_SWEEP_TAB_ENTRIES 42
594#define MAX_SWEEP_TAB_ENTRIES_PER_PACKET 7
595/* MAX_RATES_LENGTH needs to be 12. The spec says 8, and many APs
596 * only use 8, and then use extended rates for the remaining supported
597 * rates. Other APs, however, stick all of their supported rates on the
598 * main rates information element... */
599#define MAX_RATES_LENGTH ((u8)12)
600#define MAX_RATES_EX_LENGTH ((u8)16)
601#define MAX_NETWORK_COUNT 128
602
603#define CRC_LENGTH 4U
604
605#define MAX_WPA_IE_LEN 64
606
607#define NETWORK_EMPTY_ESSID (1<<0)
608#define NETWORK_HAS_OFDM (1<<1)
609#define NETWORK_HAS_CCK (1<<2)
610
611struct ieee80211_network {
612 /* These entries are used to identify a unique network */
613 u8 bssid[ETH_ALEN];
614 u8 channel;
615 /* Ensure null-terminated for any debug msgs */
616 u8 ssid[IW_ESSID_MAX_SIZE + 1];
617 u8 ssid_len;
618
619 /* These are network statistics */
620 struct ieee80211_rx_stats stats;
621 u16 capability;
622 u8 rates[MAX_RATES_LENGTH];
623 u8 rates_len;
624 u8 rates_ex[MAX_RATES_EX_LENGTH];
625 u8 rates_ex_len;
626 unsigned long last_scanned;
627 u8 mode;
628 u8 flags;
629 u32 last_associate;
630 u32 time_stamp[2];
631 u16 beacon_interval;
632 u16 listen_interval;
633 u16 atim_window;
634 u8 wpa_ie[MAX_WPA_IE_LEN];
635 size_t wpa_ie_len;
636 u8 rsn_ie[MAX_WPA_IE_LEN];
637 size_t rsn_ie_len;
638 struct list_head list;
639};
640
641enum ieee80211_state {
642 IEEE80211_UNINITIALIZED = 0,
643 IEEE80211_INITIALIZED,
644 IEEE80211_ASSOCIATING,
645 IEEE80211_ASSOCIATED,
646 IEEE80211_AUTHENTICATING,
647 IEEE80211_AUTHENTICATED,
648 IEEE80211_SHUTDOWN
649};
650
651#define DEFAULT_MAX_SCAN_AGE (15 * HZ)
652#define DEFAULT_FTS 2346
653
654
655#define CFG_IEEE80211_RESERVE_FCS (1<<0)
656#define CFG_IEEE80211_COMPUTE_FCS (1<<1)
657
658struct ieee80211_device {
659 struct net_device *dev;
660
661 /* Bookkeeping structures */
662 struct net_device_stats stats;
663 struct ieee80211_stats ieee_stats;
664
665 /* Probe / Beacon management */
666 struct list_head network_free_list;
667 struct list_head network_list;
668 struct ieee80211_network *networks;
669 int scans;
670 int scan_age;
671
672 int iw_mode; /* operating mode (IW_MODE_*) */
673
674 spinlock_t lock;
675
676 int tx_headroom; /* Set to size of any additional room needed at front
677 * of allocated Tx SKBs */
678 u32 config;
679
680 /* WEP and other encryption related settings at the device level */
681 int open_wep; /* Set to 1 to allow unencrypted frames */
682
683 int reset_on_keychange; /* Set to 1 if the HW needs to be reset on
684 * WEP key changes */
685
686 /* If the host performs {en,de}cryption, then set to 1 */
687 int host_encrypt;
688 int host_decrypt;
689 int ieee802_1x; /* is IEEE 802.1X used */
690
691 /* WPA data */
692 int wpa_enabled;
693 int drop_unencrypted;
694 int tkip_countermeasures;
695 int privacy_invoked;
696 size_t wpa_ie_len;
697 u8 *wpa_ie;
698
699 struct list_head crypt_deinit_list;
700 struct ieee80211_crypt_data *crypt[WEP_KEYS];
701 int tx_keyidx; /* default TX key index (crypt[tx_keyidx]) */
702 struct timer_list crypt_deinit_timer;
703
704 int bcrx_sta_key; /* use individual keys to override default keys even
705 * with RX of broad/multicast frames */
706
707 /* Fragmentation structures */
708 struct ieee80211_frag_entry frag_cache[IEEE80211_FRAG_CACHE_LEN];
709 unsigned int frag_next_idx;
710 u16 fts; /* Fragmentation Threshold */
711
712 /* Association info */
713 u8 bssid[ETH_ALEN];
714
715 enum ieee80211_state state;
716
717 int mode; /* A, B, G */
718 int modulation; /* CCK, OFDM */
719 int freq_band; /* 2.4Ghz, 5.2Ghz, Mixed */
720 int abg_ture; /* ABG flag */
721
722 /* Callback functions */
723 void (*set_security)(struct net_device *dev,
724 struct ieee80211_security *sec);
725 int (*hard_start_xmit)(struct ieee80211_txb *txb,
726 struct net_device *dev);
727 int (*reset_port)(struct net_device *dev);
728
729 /* This must be the last item so that it points to the data
730 * allocated beyond this structure by alloc_ieee80211 */
731 u8 priv[0];
732};
733
734#define IEEE_A (1<<0)
735#define IEEE_B (1<<1)
736#define IEEE_G (1<<2)
737#define IEEE_MODE_MASK (IEEE_A|IEEE_B|IEEE_G)
738
739extern inline void *ieee80211_priv(struct net_device *dev)
740{
741 return ((struct ieee80211_device *)netdev_priv(dev))->priv;
742}
743
744extern inline int ieee80211_is_empty_essid(const char *essid, int essid_len)
745{
746 /* Single white space is for Linksys APs */
747 if (essid_len == 1 && essid[0] == ' ')
748 return 1;
749
750 /* Otherwise, if the entire essid is 0, we assume it is hidden */
751 while (essid_len) {
752 essid_len--;
753 if (essid[essid_len] != '\0')
754 return 0;
755 }
756
757 return 1;
758}
759
760extern inline int ieee80211_is_valid_mode(struct ieee80211_device *ieee, int mode)
761{
762 /*
763 * It is possible for both access points and our device to support
764 * combinations of modes, so as long as there is one valid combination
765 * of ap/device supported modes, then return success
766 *
767 */
768 if ((mode & IEEE_A) &&
769 (ieee->modulation & IEEE80211_OFDM_MODULATION) &&
770 (ieee->freq_band & IEEE80211_52GHZ_BAND))
771 return 1;
772
773 if ((mode & IEEE_G) &&
774 (ieee->modulation & IEEE80211_OFDM_MODULATION) &&
775 (ieee->freq_band & IEEE80211_24GHZ_BAND))
776 return 1;
777
778 if ((mode & IEEE_B) &&
779 (ieee->modulation & IEEE80211_CCK_MODULATION) &&
780 (ieee->freq_band & IEEE80211_24GHZ_BAND))
781 return 1;
782
783 return 0;
784}
785
786extern inline int ieee80211_get_hdrlen(u16 fc)
787{
788 int hdrlen = IEEE80211_3ADDR_LEN;
789
790 switch (WLAN_FC_GET_TYPE(fc)) {
791 case IEEE80211_FTYPE_DATA:
792 if ((fc & IEEE80211_FCTL_FROMDS) && (fc & IEEE80211_FCTL_TODS))
793 hdrlen = IEEE80211_4ADDR_LEN;
794 break;
795 case IEEE80211_FTYPE_CTL:
796 switch (WLAN_FC_GET_STYPE(fc)) {
797 case IEEE80211_STYPE_CTS:
798 case IEEE80211_STYPE_ACK:
799 hdrlen = IEEE80211_1ADDR_LEN;
800 break;
801 default:
802 hdrlen = IEEE80211_2ADDR_LEN;
803 break;
804 }
805 break;
806 }
807
808 return hdrlen;
809}
810
811
812
813/* ieee80211.c */
814extern void free_ieee80211(struct net_device *dev);
815extern struct net_device *alloc_ieee80211(int sizeof_priv);
816
817extern int ieee80211_set_encryption(struct ieee80211_device *ieee);
818
819/* ieee80211_tx.c */
820extern int ieee80211_xmit(struct sk_buff *skb,
821 struct net_device *dev);
822extern void ieee80211_txb_free(struct ieee80211_txb *);
823
824
825/* ieee80211_rx.c */
826extern int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb,
827 struct ieee80211_rx_stats *rx_stats);
828extern void ieee80211_rx_mgt(struct ieee80211_device *ieee,
829 struct ieee80211_hdr *header,
830 struct ieee80211_rx_stats *stats);
831
832/* ieee80211_wx.c */
833extern int ieee80211_wx_get_scan(struct ieee80211_device *ieee,
834 struct iw_request_info *info,
835 union iwreq_data *wrqu, char *key);
836extern int ieee80211_wx_set_encode(struct ieee80211_device *ieee,
837 struct iw_request_info *info,
838 union iwreq_data *wrqu, char *key);
839extern int ieee80211_wx_get_encode(struct ieee80211_device *ieee,
840 struct iw_request_info *info,
841 union iwreq_data *wrqu, char *key);
842
843
844extern inline void ieee80211_increment_scans(struct ieee80211_device *ieee)
845{
846 ieee->scans++;
847}
848
849extern inline int ieee80211_get_scans(struct ieee80211_device *ieee)
850{
851 return ieee->scans;
852}
853
854
855#endif /* IEEE80211_H */