iPXE
ieee80211.h
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1 #ifndef _IPXE_IEEE80211_H
2 #define _IPXE_IEEE80211_H
3 
4 #include <stddef.h>
5 #include <ipxe/if_ether.h> /* for ETH_ALEN */
6 #include <endian.h>
7 
8 /** @file
9  * Constants and data structures defined in IEEE 802.11, subsetted
10  * according to what iPXE knows how to use.
11  */
12 
13 FILE_LICENCE(GPL2_OR_LATER);
14 
15 /* ---------- Maximum lengths of things ---------- */
16 
17 /**
18  * @defgroup ieee80211_maxlen Maximum lengths in the 802.11 protocol
19  * @{
20  */
21 
22 /** Maximum length of frame payload
23  *
24  * This does not include cryptographic overhead, which can be up to 20
25  * bytes, but it DOES include the 802.2 LLC/SNAP headers that are used
26  * on data frames (but not management frames).
27  */
28 #define IEEE80211_MAX_DATA_LEN 2304
29 
30 /** Length of LLC/SNAP headers on data frames */
31 #define IEEE80211_LLC_HEADER_LEN 8
32 
33 /** Maximum cryptographic overhead before encrypted data */
34 #define IEEE80211_MAX_CRYPTO_HEADER 8
35 
36 /** Maximum cryptographic overhead after encrypted data
37  *
38  * This does not count the MIC in TKIP frames, since that is
39  * considered to be part of the MSDU and thus contributes to the size
40  * of the data field.
41  *
42  * It @e does count the MIC in CCMP frames, which is considered part
43  * of the MPDU (outside the data field).
44  */
45 #define IEEE80211_MAX_CRYPTO_TRAILER 8
46 
47 /** Total maximum cryptographic overhead */
48 #define IEEE80211_MAX_CRYPTO_OVERHEAD 16
49 
50 /** Bytes of network-layer data that can go into a regular data frame */
51 #define IEEE80211_MAX_FRAME_DATA 2296
52 
53 /** Frame header length for frames we might work with
54  *
55  * QoS adds a two-byte field on top of this, and APs communicating
56  * with each other in Wireless Distribution System (WDS) mode add an
57  * extra 6-byte MAC address field, but we do not work with such
58  * frames.
59  */
60 #define IEEE80211_TYP_FRAME_HEADER_LEN 24
61 
62 /** Theoretical maximum frame header length
63  *
64  * This includes the QoS and WDS Addr4 fields that we should never
65  * see.
66  */
67 #define IEEE80211_MAX_FRAME_HEADER_LEN 32
68 
69 /** Maximum combined frame length
70  *
71  * The biggest frame will include 32 frame header bytes, 16 bytes of
72  * crypto overhead, and 2304 data bytes.
73  */
74 #define IEEE80211_MAX_FRAME_LEN 2352
75 
76 /** Maximum length of an ESSID */
77 #define IEEE80211_MAX_SSID_LEN 32
78 
79 /** @} */
80 
81 
82 /* ---------- Frame Control defines ---------- */
83 
84 /**
85  * @defgroup ieee80211_fc 802.11 Frame Control field bits
86  * @{
87  */
88 
89 /** 802.11 Frame Control field, Version bitmask */
90 #define IEEE80211_FC_VERSION 0x0003
91 
92 /** Expected value of Version bits in Frame Control */
93 #define IEEE80211_THIS_VERSION 0x0000
94 
95 
96 /** 802.11 Frame Control field, Frame Type bitmask */
97 #define IEEE80211_FC_TYPE 0x000C
98 
99 /** Type value for management (layer-2) frames */
100 #define IEEE80211_TYPE_MGMT 0x0000
101 
102 /** Type value for control (layer-1, hardware-managed) frames */
103 #define IEEE80211_TYPE_CTRL 0x0004
104 
105 /** Type value for data frames */
106 #define IEEE80211_TYPE_DATA 0x0008
107 
108 
109 /** 802.11 Frame Control field, Frame Subtype bitmask */
110 #define IEEE80211_FC_SUBTYPE 0x00F0
111 
112 /** Subtype value for association-request management frames
113  *
114  * Association request frames are sent after authentication from the
115  * client to the Access Point to establish the client as part of the
116  * Access Point's network.
117  */
118 #define IEEE80211_STYPE_ASSOC_REQ 0x0000
119 
120 /** Subtype value for association-response management frames
121  *
122  * Association response frames are sent by the Access Point to confirm
123  * or deny the association requested in an association request frame.
124  */
125 #define IEEE80211_STYPE_ASSOC_RESP 0x0010
126 
127 /** Subtype value for reassociation-request management frames
128  *
129  * Reassociation request frames are sent by clients wishing to change
130  * from one Access Point to another while roaming within the same
131  * extended network (same ESSID).
132  */
133 #define IEEE80211_STYPE_REASSOC_REQ 0x0020
134 
135 /** Subtype value for reassociation-response management frames
136  *
137  * Reassociation response frames are sent by the Access Point to
138  * confirm or deny the swap requested in a reassociation request
139  * frame.
140  */
141 #define IEEE80211_STYPE_REASSOC_RESP 0x0030
142 
143 /** Subtype value for probe-request management frames
144  *
145  * Probe request frames are sent by clients to request that all Access
146  * Points on the sending channel, or all belonging to a particular
147  * ESSID, identify themselves by BSSID, supported transfer rates, RF
148  * configuration, and other capabilities.
149  */
150 #define IEEE80211_STYPE_PROBE_REQ 0x0040
151 
152 /** Subtype value for probe-response management frames
153  *
154  * Probe response frames are sent by Access Points in response to
155  * probe request frames, providing the requested information.
156  */
157 #define IEEE80211_STYPE_PROBE_RESP 0x0050
158 
159 /** Subtype value for beacon management frames
160  *
161  * Beacon frames are sent by Access Points at regular intervals,
162  * usually ten per second, on the channel on which they communicate.
163  * They can be used to probe passively for access points on a channel
164  * where local regulatory restrictions prohibit active scanning, or
165  * due to their regularity as a mechanism to determine the fraction of
166  * packets that are being dropped.
167  */
168 #define IEEE80211_STYPE_BEACON 0x0080
169 
170 /** Subtype value for disassociation management frames
171  *
172  * Disassociation frames are sent by either a client or an Access
173  * Point to unequivocally terminate the association between the two.
174  * They may be sent by clients upon leaving the network, or by an
175  * Access Point upon reconfiguration, among other reasons; they are
176  * usually more "polite" than deauthentication frames.
177  */
178 #define IEEE80211_STYPE_DISASSOC 0x00A0
179 
180 /** Subtype value for authentication management frames
181  *
182  * Authentication frames are exchanged between a client and an Access
183  * Point before association may be performed. Confusingly, in the most
184  * common authentication method (Open System) no security tokens are
185  * exchanged at all. Modern 802.11 security handshaking takes place
186  * after association.
187  */
188 #define IEEE80211_STYPE_AUTH 0x00B0
189 
190 /** Subtype value for deauthentication management frames
191  *
192  * Deauthentication frames are sent by either a client or an Access
193  * Point to terminate the authentication (and therefore also the
194  * association) between the two. They are generally more forceful than
195  * disassociation frames, sent for such reasons as a failure to
196  * set up security properly after associating.
197  */
198 #define IEEE80211_STYPE_DEAUTH 0x00C0
199 
200 /** Subtype value for action management frames
201  *
202  * Action frames are used to implement spectrum management and QoS
203  * features that iPXE currently does not support.
204  */
205 #define IEEE80211_STYPE_ACTION 0x00D0
206 
207 
208 /** Subtype value for RTS (request to send) control frames */
209 #define IEEE80211_STYPE_RTS 0x00B0
210 
211 /** Subtype value for CTS (clear to send) control frames */
212 #define IEEE80211_STYPE_CTS 0x00C0
213 
214 /** Subtype value for ACK (acknowledgement) control frames */
215 #define IEEE80211_STYPE_ACK 0x00D0
216 
217 
218 /** Subtype value for ordinary data frames, with no QoS or CF add-ons */
219 #define IEEE80211_STYPE_DATA 0x0000
220 
221 /** Subtype value for data frames containing no data */
222 #define IEEE80211_STYPE_NODATA 0x0040
223 
224 
225 /** 802.11 Frame Control field: To Data System flag
226  *
227  * This is set on data frames sent to an Access Point.
228  */
229 #define IEEE80211_FC_TODS 0x0100
230 
231 /** 802.11 Frame Control field: From Data System flag
232  *
233  * This is set on data frames sent from an Access Point. If both TODS
234  * and FROMDS are set, the frame header is a 4-address format used for
235  * inter-Access Point communication.
236  */
237 #define IEEE80211_FC_FROMDS 0x0200
238 
239 /** 802.11 Frame Control field: More Fragments flag */
240 #define IEEE80211_FC_MORE_FRAG 0x0400
241 
242 /** 802.11 Frame Control field: Retransmission flag */
243 #define IEEE80211_FC_RETRY 0x0800
244 
245 /** 802.11 Frame Control field: Power Managed flag
246  *
247  * This is set on any frame sent by a low-power station that will go
248  * into a power-saving mode immediately after this frame. Access
249  * Points are not allowed to act as low-power stations.
250  */
251 #define IEEE80211_FC_PWR_MGMT 0x1000
252 
253 /** 802.11 Frame Control field: More Data flag
254  *
255  * This is set on any frame sent by a station that has more data
256  * queued to be sent than is in the frame.
257  */
258 #define IEEE80211_FC_MORE_DATA 0x2000
259 
260 /** 802.11 Frame Control field: Protected flag
261  *
262  * This is set on frames in which data is encrypted (by any method).
263  */
264 #define IEEE80211_FC_PROTECTED 0x4000
265 
266 /** 802.11 Frame Control field: Ordered flag [?] */
267 #define IEEE80211_FC_ORDER 0x8000
268 
269 /** @} */
270 
271 
272 /* ---------- Sequence Control defines ---------- */
273 
274 /**
275  * @defgroup ieee80211_seq 802.11 Sequence Control field handling
276  * @{
277  */
278 
279 /** Extract sequence number from 802.11 Sequence Control field */
280 #define IEEE80211_SEQNR( seq ) ( ( seq ) >> 4 )
281 
282 /** Extract fragment number from 802.11 Sequence Control field */
283 #define IEEE80211_FRAG( seq ) ( ( seq ) & 0x000F )
284 
285 /** Make 802.11 Sequence Control field from sequence and fragment numbers */
286 #define IEEE80211_MAKESEQ( seqnr, frag ) \
287  ( ( ( ( seqnr ) & 0xFFF ) << 4 ) | ( ( frag ) & 0xF ) )
288 
289 /** @} */
290 
291 
292 /* ---------- Frame header formats ---------- */
293 
294 /**
295  * @defgroup ieee80211_hdr 802.11 frame header formats
296  * @{
297  */
298 
299 /** An 802.11 data or management frame without QoS or WDS header fields */
301 {
302  u16 fc; /**< 802.11 Frame Control field */
303  u16 duration; /**< Microseconds to reserve link */
304  u8 addr1[ETH_ALEN]; /**< Address 1 (immediate receiver) */
305  u8 addr2[ETH_ALEN]; /**< Address 2 (immediate sender) */
306  u8 addr3[ETH_ALEN]; /**< Address 3 (often "forward to") */
307  u16 seq; /**< 802.11 Sequence Control field */
308  u8 data[0]; /**< Beginning of frame data */
309 } __attribute__((packed));
310 
311 /** The 802.2 LLC/SNAP header sent before actual data in a data frame
312  *
313  * This header is not acknowledged in the 802.11 standard at all; it
314  * is treated just like data for MAC-layer purposes, including
315  * fragmentation and encryption. It is actually two headers
316  * concatenated: a three-byte 802.2 LLC header indicating Subnetwork
317  * Accesss Protocol (SNAP) in both source and destination Service
318  * Access Point (SAP) fields, and a five-byte SNAP header indicating a
319  * zero OUI and two-byte Ethernet protocol type field.
320  *
321  * Thus, an eight-byte header in which six of the bytes are redundant.
322  * Lovely, isn't it?
323  */
325 {
326  /* LLC part: */
327  u8 dsap; /**< Destination SAP ID */
328  u8 ssap; /**< Source SAP ID */
329  u8 ctrl; /**< Control information */
330 
331  /* SNAP part: */
332  u8 oui[3]; /**< Organization code, usually 0 */
333  u16 ethertype; /**< Ethernet Type field */
334 } __attribute__((packed));
335 
336 /** Value for DSAP field in 802.2 LLC header for 802.11 frames: SNAP */
337 #define IEEE80211_LLC_DSAP 0xAA
338 
339 /** Value for SSAP field in 802.2 LLC header for 802.11 frames: SNAP */
340 #define IEEE80211_LLC_SSAP 0xAA
341 
342 /** Value for control field in 802.2 LLC header for 802.11 frames
343  *
344  * "Unnumbered Information".
345  */
346 #define IEEE80211_LLC_CTRL 0x03
347 
348 
349 /** 16-byte RTS frame format, with abbreviated header */
351 {
352  u16 fc; /**< 802.11 Frame Control field */
353  u16 duration; /**< Microseconds to reserve link */
354  u8 addr1[ETH_ALEN]; /**< Address 1 (immediate receiver) */
355  u8 addr2[ETH_ALEN]; /**< Address 2 (immediate sender) */
356 } __attribute__((packed));
357 
358 /** Length of 802.11 RTS control frame */
359 #define IEEE80211_RTS_LEN 16
360 
361 /** 10-byte CTS or ACK frame format, with abbreviated header */
363 {
364  u16 fc; /**< 802.11 Frame Control field */
365  u16 duration; /**< Microseconds to reserve link */
366  u8 addr1[ETH_ALEN]; /**< Address 1 (immediate receiver) */
367 } __attribute__((packed));
368 
369 #define ieee80211_cts ieee80211_cts_or_ack
370 #define ieee80211_ack ieee80211_cts_or_ack
371 
372 /** Length of 802.11 CTS control frame */
373 #define IEEE80211_CTS_LEN 10
374 
375 /** Length of 802.11 ACK control frame */
376 #define IEEE80211_ACK_LEN 10
377 
378 /** @} */
379 
380 
381 /* ---------- Capability bits, status and reason codes ---------- */
382 
383 /**
384  * @defgroup ieee80211_capab 802.11 management frame capability field bits
385  * @{
386  */
387 
388 /** Set if using an Access Point (managed mode) */
389 #define IEEE80211_CAPAB_MANAGED 0x0001
390 
391 /** Set if operating in IBSS (no-AP, "Ad-Hoc") mode */
392 #define IEEE80211_CAPAB_ADHOC 0x0002
393 
394 /** Set if we support Contention-Free Period operation */
395 #define IEEE80211_CAPAB_CFPOLL 0x0004
396 
397 /** Set if we wish to be polled for Contention-Free operation */
398 #define IEEE80211_CAPAB_CFPR 0x0008
399 
400 /** Set if the network is encrypted (by any method) */
401 #define IEEE80211_CAPAB_PRIVACY 0x0010
402 
403 /** Set if PHY supports short preambles on 802.11b */
404 #define IEEE80211_CAPAB_SHORT_PMBL 0x0020
405 
406 /** Set if PHY supports PBCC modulation */
407 #define IEEE80211_CAPAB_PBCC 0x0040
408 
409 /** Set if we support Channel Agility */
410 #define IEEE80211_CAPAB_CHAN_AGILITY 0x0080
411 
412 /** Set if we support spectrum management (DFS and TPC) on the 5GHz band */
413 #define IEEE80211_CAPAB_SPECTRUM_MGMT 0x0100
414 
415 /** Set if we support Quality of Service enhancements */
416 #define IEEE80211_CAPAB_QOS 0x0200
417 
418 /** Set if PHY supports short slot time on 802.11g */
419 #define IEEE80211_CAPAB_SHORT_SLOT 0x0400
420 
421 /** Set if PHY supports APSD option */
422 #define IEEE80211_CAPAB_APSD 0x0800
423 
424 /** Set if PHY supports DSSS/OFDM modulation (one way of 802.11 b/g mixing) */
425 #define IEEE80211_CAPAB_DSSS_OFDM 0x2000
426 
427 /** Set if we support delayed block ACK */
428 #define IEEE80211_CAPAB_DELAYED_BACK 0x4000
429 
430 /** Set if we support immediate block ACK */
431 #define IEEE80211_CAPAB_IMMED_BACK 0x8000
432 
433 /** @} */
434 
435 
436 /**
437  * @defgroup ieee80211_status 802.11 status codes
438  *
439  * These are returned to indicate an immediate denial of
440  * authentication or association. In iPXE, the lower 5 bits of the
441  * status code are encoded into the file-unique portion of an error
442  * code, the ERRFILE portion is always @c ERRFILE_net80211, and the
443  * POSIX error code is @c ECONNREFUSED for status 0-31 or @c
444  * EHOSTUNREACH for status 32-63.
445  *
446  * For a complete table with non-abbreviated error messages, see IEEE
447  * Std 802.11-2007, Table 7-23, p.94.
448  *
449  * @{
450  */
451 
452 #define IEEE80211_STATUS_SUCCESS 0
453 #define IEEE80211_STATUS_FAILURE 1
454 #define IEEE80211_STATUS_CAPAB_UNSUPP 10
455 #define IEEE80211_STATUS_REASSOC_INVALID 11
456 #define IEEE80211_STATUS_ASSOC_DENIED 12
457 #define IEEE80211_STATUS_AUTH_ALGO_UNSUPP 13
458 #define IEEE80211_STATUS_AUTH_SEQ_INVALID 14
459 #define IEEE80211_STATUS_AUTH_CHALL_INVALID 15
460 #define IEEE80211_STATUS_AUTH_TIMEOUT 16
461 #define IEEE80211_STATUS_ASSOC_NO_ROOM 17
462 #define IEEE80211_STATUS_ASSOC_NEED_RATE 18
463 #define IEEE80211_STATUS_ASSOC_NEED_SHORT_PMBL 19
464 #define IEEE80211_STATUS_ASSOC_NEED_PBCC 20
465 #define IEEE80211_STATUS_ASSOC_NEED_CHAN_AGILITY 21
466 #define IEEE80211_STATUS_ASSOC_NEED_SPECTRUM_MGMT 22
467 #define IEEE80211_STATUS_ASSOC_BAD_POWER 23
468 #define IEEE80211_STATUS_ASSOC_BAD_CHANNELS 24
469 #define IEEE80211_STATUS_ASSOC_NEED_SHORT_SLOT 25
470 #define IEEE80211_STATUS_ASSOC_NEED_DSSS_OFDM 26
471 #define IEEE80211_STATUS_QOS_FAILURE 32
472 #define IEEE80211_STATUS_QOS_NO_ROOM 33
473 #define IEEE80211_STATUS_LINK_IS_HORRIBLE 34
474 #define IEEE80211_STATUS_ASSOC_NEED_QOS 35
475 #define IEEE80211_STATUS_REQUEST_DECLINED 37
476 #define IEEE80211_STATUS_REQUEST_INVALID 38
477 #define IEEE80211_STATUS_TS_NOT_CREATED_AGAIN 39
478 #define IEEE80211_STATUS_INVALID_IE 40
479 #define IEEE80211_STATUS_GROUP_CIPHER_INVALID 41
480 #define IEEE80211_STATUS_PAIR_CIPHER_INVALID 42
481 #define IEEE80211_STATUS_AKMP_INVALID 43
482 #define IEEE80211_STATUS_RSN_VERSION_UNSUPP 44
483 #define IEEE80211_STATUS_RSN_CAPAB_INVALID 45
484 #define IEEE80211_STATUS_CIPHER_REJECTED 46
485 #define IEEE80211_STATUS_TS_NOT_CREATED_WAIT 47
486 #define IEEE80211_STATUS_DIRECT_LINK_FORBIDDEN 48
487 #define IEEE80211_STATUS_DEST_NOT_PRESENT 49
488 #define IEEE80211_STATUS_DEST_NOT_QOS 50
489 #define IEEE80211_STATUS_ASSOC_LISTEN_TOO_HIGH 51
490 
491 /** @} */
492 
493 
494 
495 /**
496  * @defgroup ieee80211_reason 802.11 reason codes
497  *
498  * These are returned to indicate the reason for a deauthentication or
499  * disassociation sent (usually) after authentication or association
500  * had succeeded. In iPXE, the lower 5 bits of the reason code are
501  * encoded into the file-unique portion of an error code, the ERRFILE
502  * portion is always @c ERRFILE_net80211, and the POSIX error code is
503  * @c ECONNRESET for reason 0-31 or @c ENETRESET for reason 32-63.
504  *
505  * For a complete table with non-abbreviated error messages, see IEEE
506  * Std 802.11-2007, Table 7-22, p.92.
507  *
508  * @{
509  */
510 
511 #define IEEE80211_REASON_NONE 0
512 #define IEEE80211_REASON_UNSPECIFIED 1
513 #define IEEE80211_REASON_AUTH_NO_LONGER_VALID 2
514 #define IEEE80211_REASON_LEAVING 3
515 #define IEEE80211_REASON_INACTIVITY 4
516 #define IEEE80211_REASON_OUT_OF_RESOURCES 5
517 #define IEEE80211_REASON_NEED_AUTH 6
518 #define IEEE80211_REASON_NEED_ASSOC 7
519 #define IEEE80211_REASON_LEAVING_TO_ROAM 8
520 #define IEEE80211_REASON_REASSOC_INVALID 9
521 #define IEEE80211_REASON_BAD_POWER 10
522 #define IEEE80211_REASON_BAD_CHANNELS 11
523 #define IEEE80211_REASON_INVALID_IE 13
524 #define IEEE80211_REASON_MIC_FAILURE 14
525 #define IEEE80211_REASON_4WAY_TIMEOUT 15
526 #define IEEE80211_REASON_GROUPKEY_TIMEOUT 16
527 #define IEEE80211_REASON_4WAY_INVALID 17
528 #define IEEE80211_REASON_GROUP_CIPHER_INVALID 18
529 #define IEEE80211_REASON_PAIR_CIPHER_INVALID 19
530 #define IEEE80211_REASON_AKMP_INVALID 20
531 #define IEEE80211_REASON_RSN_VERSION_INVALID 21
532 #define IEEE80211_REASON_RSN_CAPAB_INVALID 22
533 #define IEEE80211_REASON_8021X_FAILURE 23
534 #define IEEE80211_REASON_CIPHER_REJECTED 24
535 #define IEEE80211_REASON_QOS_UNSPECIFIED 32
536 #define IEEE80211_REASON_QOS_OUT_OF_RESOURCES 33
537 #define IEEE80211_REASON_LINK_IS_HORRIBLE 34
538 #define IEEE80211_REASON_INVALID_TXOP 35
539 #define IEEE80211_REASON_REQUESTED_LEAVING 36
540 #define IEEE80211_REASON_REQUESTED_NO_USE 37
541 #define IEEE80211_REASON_REQUESTED_NEED_SETUP 38
542 #define IEEE80211_REASON_REQUESTED_TIMEOUT 39
543 #define IEEE80211_REASON_CIPHER_UNSUPPORTED 45
544 
545 /** @} */
546 
547 /* ---------- Information element declarations ---------- */
548 
549 /**
550  * @defgroup ieee80211_ie 802.11 information elements
551  *
552  * Many management frames include a section that amounts to a
553  * concatenation of these information elements, so that the sender can
554  * choose which information to send and the receiver can ignore the
555  * parts it doesn't understand. Each IE contains a two-byte header,
556  * one byte ID and one byte length, followed by IE-specific data. The
557  * length does not include the two-byte header. Information elements
558  * are required to be sorted by ID, but iPXE does not require that in
559  * those it receives.
560  *
561  * This group also includes a few inline functions to simplify common
562  * tasks in IE processing.
563  *
564  * @{
565  */
566 
567 /** Generic 802.11 information element header */
569  u8 id; /**< Information element ID */
570  u8 len; /**< Information element length */
571 } __attribute__ ((packed));
572 
573 
574 /** 802.11 SSID information element */
576  u8 id; /**< SSID ID: 0 */
577  u8 len; /**< SSID length */
578  char ssid[0]; /**< SSID data, not NUL-terminated */
579 } __attribute__ ((packed));
580 
581 /** Information element ID for SSID information element */
582 #define IEEE80211_IE_SSID 0
583 
584 
585 /** 802.11 rates information element
586  *
587  * The first 8 rates go in an IE of type RATES (1), and any more rates
588  * go in one of type EXT_RATES (50). Each rate is a byte with the low
589  * 7 bits equal to the rate in units of 500 kbps, and the high bit set
590  * if and only if the rate is "basic" (must be supported by all
591  * connected stations).
592  */
594  u8 id; /**< Rates ID: 1 or 50 */
595  u8 len; /**< Number of rates */
596  u8 rates[0]; /**< Rates data, one rate per byte */
597 } __attribute__ ((packed));
598 
599 /** Information element ID for rates information element */
600 #define IEEE80211_IE_RATES 1
601 
602 /** Information element ID for extended rates information element */
603 #define IEEE80211_IE_EXT_RATES 50
604 
605 
606 /** 802.11 Direct Spectrum parameter information element
607  *
608  * This just contains the channel number. It has the fancy name
609  * because IEEE 802.11 also defines a frequency-hopping PHY that
610  * changes channels at regular intervals following a predetermined
611  * pattern; in practice nobody uses the FH PHY.
612  */
614  u8 id; /**< DS parameter ID: 3 */
615  u8 len; /**< DS parameter length: 1 */
616  u8 current_channel; /**< Current channel number, 1-14 */
617 } __attribute__ ((packed));
618 
619 /** Information element ID for Direct Spectrum parameter information element */
620 #define IEEE80211_IE_DS_PARAM 3
621 
622 
623 /** 802.11 Country information element regulatory extension triplet */
625  u8 reg_ext_id; /**< Regulatory extension ID */
626  u8 reg_class_id; /**< Regulatory class ID */
627  u8 coverage_class; /**< Coverage class */
628 } __attribute__ ((packed));
629 
630 /** 802.11 Country information element regulatory band triplet */
632  u8 first_channel; /**< Channel number for first channel in band */
633  u8 nr_channels; /**< Number of contiguous channels in band */
634  u8 max_txpower; /**< Maximum TX power in dBm */
635 } __attribute__ ((packed));
636 
637 /** 802.11 Country information element regulatory triplet
638  *
639  * It is a band triplet if the first byte is 200 or less, and a
640  * regulatory extension triplet otherwise.
641  */
643  /** Differentiator between band and ext triplets */
645 
646  /** Information about a band of channels */
648 
649  /** Regulatory extension information */
651 };
652 
653 /** 802.11 Country information element
654  *
655  * This contains some data about RF regulations.
656  */
658  u8 id; /**< Country information ID: 7 */
659  u8 len; /**< Country information length: varies */
660  char name[2]; /**< ISO Alpha2 country code */
661  char in_out; /**< 'I' for indoor, 'O' for outdoor */
662 
663  /** List of regulatory triplets */
665 } __attribute__ ((packed));
666 
667 /** Information element ID for Country information element */
668 #define IEEE80211_IE_COUNTRY 7
669 
670 
671 /** 802.11 Request information element
672  *
673  * This contains a list of information element types we would like to
674  * be included in probe response frames.
675  */
677  u8 id; /**< Request ID: 10 */
678  u8 len; /**< Number of IEs requested */
679  u8 request[0]; /**< List of IEs requested */
680 } __attribute__ ((packed));
681 
682 /** Information element ID for Request information element */
683 #define IEEE80211_IE_REQUEST 10
684 
685 
686 /** 802.11 Challenge Text information element
687  *
688  * This is used in authentication frames under Shared Key
689  * authentication.
690  */
692  u8 id; /**< Challenge Text ID: 16 */
693  u8 len; /**< Challenge Text length: usually 128 */
694  u8 challenge_text[0]; /**< Challenge Text data */
695 } __attribute__ ((packed));
696 
697 /** Information element ID for Challenge Text information element */
698 #define IEEE80211_IE_CHALLENGE_TEXT 16
699 
700 
701 /** 802.11 Power Constraint information element
702  *
703  * This is used to specify an additional power limitation on top of
704  * the Country requirements.
705  */
707  u8 id; /**< Power Constraint ID: 52 */
708  u8 len; /**< Power Constraint length: 1 */
709  u8 power_constraint; /**< Decrease in allowed TX power, dBm */
710 } __attribute__ ((packed));
711 
712 /** Information element ID for Power Constraint information element */
713 #define IEEE80211_IE_POWER_CONSTRAINT 52
714 
715 
716 /** 802.11 Power Capability information element
717  *
718  * This is used in association request frames to indicate the extremes
719  * of our TX power abilities. It is required only if we indicate
720  * support for spectrum management.
721  */
723  u8 id; /**< Power Capability ID: 33 */
724  u8 len; /**< Power Capability length: 2 */
725  u8 min_txpower; /**< Minimum possible TX power, dBm */
726  u8 max_txpower; /**< Maximum possible TX power, dBm */
727 } __attribute__ ((packed));
728 
729 /** Information element ID for Power Capability information element */
730 #define IEEE80211_IE_POWER_CAPAB 33
731 
732 
733 /** 802.11 Channels information element channel band tuple */
735  u8 first_channel; /**< Channel number of first channel in band */
736  u8 nr_channels; /**< Number of channels in band */
737 } __attribute__ ((packed));
738 
739 /** 802.11 Channels information element
740  *
741  * This is used in association frames to indicate the channels we can
742  * use. It is required only if we indicate support for spectrum
743  * management.
744  */
746  u8 id; /**< Channels ID: 36 */
747  u8 len; /**< Channels length: 2 */
748 
749  /** List of (start, length) channel bands we can use */
751 } __attribute__ ((packed));
752 
753 /** Information element ID for Channels information element */
754 #define IEEE80211_IE_CHANNELS 36
755 
756 
757 /** 802.11 ERP Information information element
758  *
759  * This is used to communicate some PHY-level flags.
760  */
762  u8 id; /**< ERP Information ID: 42 */
763  u8 len; /**< ERP Information length: 1 */
764  u8 erp_info; /**< ERP flags */
765 } __attribute__ ((packed));
766 
767 /** Information element ID for ERP Information information element */
768 #define IEEE80211_IE_ERP_INFO 42
769 
770 /** ERP information element: Flag set if 802.11b stations are present */
771 #define IEEE80211_ERP_NONERP_PRESENT 0x01
772 
773 /** ERP information element: Flag set if CTS protection must be used */
774 #define IEEE80211_ERP_USE_PROTECTION 0x02
775 
776 /** ERP information element: Flag set if long preambles must be used */
777 #define IEEE80211_ERP_BARKER_LONG 0x04
778 
779 
780 /** 802.11 Robust Security Network ("WPA") information element
781  *
782  * Showing once again a striking clarity of design, the IEEE folks put
783  * dynamically-sized data in the middle of this structure. As such,
784  * the below structure definition only works for IEs we create
785  * ourselves, which always have one pairwise cipher and one AKM;
786  * received IEs should be parsed piecemeal.
787  *
788  * Also inspired was IEEE's choice of 16-bit fields to count the
789  * number of 4-byte elements in a structure with a maximum length of
790  * 255 bytes.
791  *
792  * Many fields reference a cipher or authentication-type ID; this is a
793  * three-byte OUI followed by one byte identifying the cipher with
794  * respect to that OUI. For all standard ciphers the OUI is 00:0F:AC,
795  * except in old-style WPA IEs encapsulated in vendor-specific IEs,
796  * where it's 00:50:F2.
797  */
799  /** Information element ID */
801 
802  /** Information element length */
804 
805  /** RSN information element version */
807 
808  /** Cipher ID for the cipher used in multicast/broadcast frames */
810 
811  /** Number of unicast ciphers supported */
813 
814  /** List of cipher IDs for supported unicast frame ciphers */
816 
817  /** Number of authentication types supported */
819 
820  /** List of authentication type IDs for supported types */
822 
823  /** Security capabilities field (RSN only) */
825 
826  /** Number of PMKIDs included (present only in association frames) */
828 
829  /** List of PMKIDs included, each a 16-byte SHA1 hash */
831 } __attribute__((packed));
832 
833 /** Information element ID for Robust Security Network information element */
834 #define IEEE80211_IE_RSN 48
835 
836 /** Calculate necessary size of RSN information element
837  *
838  * @v npair Number of pairwise ciphers supported
839  * @v nauth Number of authentication types supported
840  * @v npmkid Number of PMKIDs to include
841  * @v is_rsn If TRUE, calculate RSN IE size; if FALSE, calculate WPA IE size
842  * @ret size Necessary size of IE, including header bytes
843  */
844 static inline size_t ieee80211_rsn_size ( int npair, int nauth, int npmkid,
845  int rsn_ie ) {
846  return 16 + 4 * ( npair + nauth ) + 16 * npmkid - 4 * ! rsn_ie;
847 }
848 
849 /** Make OUI plus type byte into 32-bit integer for easy comparison */
850 #if __BYTE_ORDER == __BIG_ENDIAN
851 #define _MKOUI( a, b, c, t ) \
852  ( ( ( a ) << 24 ) | ( ( b ) << 16 ) | ( ( c ) << 8 ) | ( d ) )
853 #define OUI_ORG_MASK 0xFFFFFF00
854 #define OUI_TYPE_MASK 0x000000FF
855 #else
856 #define _MKOUI( a, b, c, t ) \
857  ( ( ( t ) << 24 ) | ( ( c ) << 16 ) | ( ( b ) << 8 ) | ( a ) )
858 #define OUI_ORG_MASK 0x00FFFFFF
859 #define OUI_TYPE_MASK 0xFF000000
860 #endif
861 
862 /** Organization part for OUIs in standard RSN IE */
863 #define IEEE80211_RSN_OUI _MKOUI ( 0x00, 0x0F, 0xAC, 0 )
864 
865 /** Organization part for OUIs in old WPA IE */
866 #define IEEE80211_WPA_OUI _MKOUI ( 0x00, 0x50, 0xF2, 0 )
867 
868 /** Old vendor-type WPA IE OUI type + subtype */
869 #define IEEE80211_WPA_OUI_VEN _MKOUI ( 0x00, 0x50, 0xF2, 0x01 )
870 
871 
872 /** 802.11 RSN IE: expected version number */
873 #define IEEE80211_RSN_VERSION 1
874 
875 /** 802.11 RSN IE: cipher type for 40-bit WEP */
876 #define IEEE80211_RSN_CTYPE_WEP40 _MKOUI ( 0, 0, 0, 0x01 )
877 
878 /** 802.11 RSN IE: cipher type for 104-bit WEP */
879 #define IEEE80211_RSN_CTYPE_WEP104 _MKOUI ( 0, 0, 0, 0x05 )
880 
881 /** 802.11 RSN IE: cipher type for TKIP ("WPA") */
882 #define IEEE80211_RSN_CTYPE_TKIP _MKOUI ( 0, 0, 0, 0x02 )
883 
884 /** 802.11 RSN IE: cipher type for CCMP ("WPA2") */
885 #define IEEE80211_RSN_CTYPE_CCMP _MKOUI ( 0, 0, 0, 0x04 )
886 
887 /** 802.11 RSN IE: cipher type for "use group"
888  *
889  * This can only appear as a pairwise cipher, and means unicast frames
890  * should be encrypted in the same way as broadcast/multicast frames.
891  */
892 #define IEEE80211_RSN_CTYPE_USEGROUP _MKOUI ( 0, 0, 0, 0x00 )
893 
894 /** 802.11 RSN IE: auth method type for using an 802.1X server */
895 #define IEEE80211_RSN_ATYPE_8021X _MKOUI ( 0, 0, 0, 0x01 )
896 
897 /** 802.11 RSN IE: auth method type for using a pre-shared key */
898 #define IEEE80211_RSN_ATYPE_PSK _MKOUI ( 0, 0, 0, 0x02 )
899 
900 /** 802.11 RSN IE capabilities: AP supports pre-authentication */
901 #define IEEE80211_RSN_CAPAB_PREAUTH 0x001
902 
903 /** 802.11 RSN IE capabilities: Node has conflict between TKIP and WEP
904  *
905  * This is a legacy issue; APs always set it to 0, and iPXE sets it to
906  * 0.
907  */
908 #define IEEE80211_RSN_CAPAB_NO_PAIRWISE 0x002
909 
910 /** 802.11 RSN IE capabilities: Number of PTKSA replay counters
911  *
912  * A value of 0 means one replay counter, 1 means two, 2 means four,
913  * and 3 means sixteen.
914  */
915 #define IEEE80211_RSN_CAPAB_PTKSA_REPLAY 0x00C
916 
917 /** 802.11 RSN IE capabilities: Number of GTKSA replay counters
918  *
919  * A value of 0 means one replay counter, 1 means two, 2 means four,
920  * and 3 means sixteen.
921  */
922 #define IEEE80211_RSN_CAPAB_GTKSA_REPLAY 0x030
923 
924 /** 802.11 RSN IE capabilities: PeerKey Handshaking is suported */
925 #define IEEE80211_RSN_CAPAB_PEERKEY 0x200
926 
927 
928 /** 802.11 RSN IE capabilities: One replay counter
929  *
930  * This should be AND'ed with @c IEEE80211_RSN_CAPAB_PTKSA_REPLAY or
931  * @c IEEE80211_RSN_CAPAB_GTKSA_REPLAY (or both) to produce a value
932  * which can be OR'ed into the capabilities field.
933  */
934 #define IEEE80211_RSN_1_CTR 0x000
935 
936 /** 802.11 RSN IE capabilities: Two replay counters */
937 #define IEEE80211_RSN_2_CTR 0x014
938 
939 /** 802.11 RSN IE capabilities: Four replay counters */
940 #define IEEE80211_RSN_4_CTR 0x028
941 
942 /** 802.11 RSN IE capabilities: 16 replay counters */
943 #define IEEE80211_RSN_16_CTR 0x03C
944 
945 
946 /** 802.11 Vendor Specific information element
947  *
948  * One often sees the RSN IE masquerading as vendor-specific on
949  * devices that were produced prior to 802.11i (the WPA amendment)
950  * being finalized.
951  */
953  u8 id; /**< Vendor-specific ID: 221 */
954  u8 len; /**< Vendor-specific length: variable */
955  u32 oui; /**< OUI and vendor-specific type byte */
956  u8 data[0]; /**< Vendor-specific data */
957 } __attribute__ ((packed));
958 
959 /** Information element ID for Vendor Specific information element */
960 #define IEEE80211_IE_VENDOR 221
961 
962 
963 
964 
965 /** Any 802.11 information element
966  *
967  * This is formatted for ease of use, so IEs with complex structures
968  * get referenced in full, while those with only one byte of data or a
969  * simple array are pulled in to avoid a layer of indirection like
970  * ie->channels.channels[0].
971  */
973 {
974  /** Generic and simple information element info */
975  struct {
976  u8 id; /**< Information element ID */
977  u8 len; /**< Information element data length */
978  union {
979  char ssid[0]; /**< SSID text */
980  u8 rates[0]; /**< Rates data */
981  u8 request[0]; /**< Request list */
982  u8 challenge_text[0]; /**< Challenge text data */
983  u8 power_constraint; /**< Power constraint, dBm */
984  u8 erp_info; /**< ERP information flags */
985  /** List of channels */
987  };
988  };
989 
990  /** DS parameter set */
992 
993  /** Country information */
995 
996  /** Power capability */
998 
999  /** Security information */
1001 
1002  /** Vendor-specific */
1004 };
1005 
1006 /** Check that 802.11 information element is bounded by buffer
1007  *
1008  * @v ie Information element
1009  * @v end End of buffer in which information element is stored
1010  * @ret ok TRUE if the IE is completely contained within the buffer
1011  */
1012 static inline int ieee80211_ie_bound ( union ieee80211_ie *ie, void *end )
1013 {
1014  void *iep = ie;
1015  return ( iep + 2 <= end && iep + 2 + ie->len <= end );
1016 }
1017 
1018 /** Advance to next 802.11 information element
1019  *
1020  * @v ie Current information element pointer
1021  * @v end Pointer to first byte not in information element space
1022  * @ret next Pointer to next information element, or NULL if no more
1023  *
1024  * When processing received IEs, @a end should be set to the I/O
1025  * buffer tail pointer; when marshalling IEs for sending, @a end
1026  * should be NULL.
1027  */
1028 static inline union ieee80211_ie * ieee80211_next_ie ( union ieee80211_ie *ie,
1029  void *end )
1031  void *next_ie_byte = ( void * ) ie + ie->len + 2;
1032  union ieee80211_ie *next_ie = next_ie_byte;
1034  if ( ! end )
1035  return next_ie;
1037  if ( ieee80211_ie_bound ( next_ie, end ) )
1038  return next_ie;
1040  return NULL;
1041 }
1042 
1043 /** @} */
1044 
1045 
1046 /* ---------- Management frame data formats ---------- */
1047 
1048 /**
1049  * @defgroup ieee80211_mgmt_data Management frame data payloads
1050  * @{
1051  */
1052 
1053 /** Beacon or probe response frame data */
1055 {
1056  /** 802.11 TSFT value at frame send */
1058 
1059  /** Interval at which beacons are sent, in units of 1024 us */
1061 
1062  /** Capability flags */
1064 
1065  /** List of information elements */
1067 } __attribute__((packed));
1068 
1069 #define ieee80211_beacon ieee80211_beacon_or_probe_resp
1070 #define ieee80211_probe_resp ieee80211_beacon_or_probe_resp
1071 
1072 /** Disassociation or deauthentication frame data */
1074 {
1075  /** Reason code */
1077 } __attribute__((packed));
1078 
1079 #define ieee80211_disassoc ieee80211_disassoc_or_deauth
1080 #define ieee80211_deauth ieee80211_disassoc_or_deauth
1081 
1082 /** Association request frame data */
1084 {
1085  /** Capability flags */
1087 
1088  /** Interval at which we wake up, in units of the beacon interval */
1090 
1091  /** List of information elements */
1093 } __attribute__((packed));
1094 
1095 /** Association or reassociation response frame data */
1097 {
1098  /** Capability flags */
1100 
1101  /** Status code */
1103 
1104  /** Association ID */
1106 
1107  /** List of information elements */
1109 } __attribute__((packed));
1110 
1111 #define ieee80211_assoc_resp ieee80211_assoc_or_reassoc_resp
1112 #define ieee80211_reassoc_resp ieee80211_assoc_or_reassoc_resp
1113 
1114 /** Reassociation request frame data */
1116 {
1117  /** Capability flags */
1119 
1120  /** Interval at which we wake up, in units of the beacon interval */
1122 
1123  /** MAC address of current Access Point */
1125 
1126  /** List of information elements */
1128 } __attribute__((packed));
1129 
1130 /** Probe request frame data */
1132 {
1133  /** List of information elements */
1135 } __attribute__((packed));
1136 
1137 /** Authentication frame data */
1139 {
1140  /** Authentication algorithm (Open System or Shared Key) */
1142 
1143  /** Sequence number of this frame; first from client to AP is 1 */
1145 
1146  /** Status code */
1148 
1149  /** List of information elements */
1151 } __attribute__((packed));
1152 
1153 /** Open System authentication algorithm */
1154 #define IEEE80211_AUTH_OPEN_SYSTEM 0
1155 
1156 /** Shared Key authentication algorithm */
1157 #define IEEE80211_AUTH_SHARED_KEY 1
1158 
1159 /** @} */
1160 
1161 #endif
u16 ethertype
Ethernet Type field.
Definition: ieee80211.h:333
Association or reassociation response frame data.
Definition: ieee80211.h:1096
uint16_t u16
Definition: stdint.h:21
u32 akm_list[1]
List of authentication type IDs for supported types.
Definition: ieee80211.h:821
u8 id
Challenge Text ID: 16.
Definition: ieee80211.h:692
union ieee80211_ie info_element[0]
List of information elements.
Definition: ieee80211.h:1108
u8 power_constraint
Decrease in allowed TX power, dBm.
Definition: ieee80211.h:709
Disassociation or deauthentication frame data.
Definition: ieee80211.h:1073
The 802.2 LLC/SNAP header sent before actual data in a data frame.
Definition: ieee80211.h:324
u8 rates[0]
Rates data, one rate per byte.
Definition: ieee80211.h:596
u16 fc
802.11 Frame Control field
Definition: ieee80211.h:302
static union ieee80211_ie * ieee80211_next_ie(union ieee80211_ie *ie, void *end)
Advance to next 802.11 information element.
Definition: ieee80211.h:1028
u16 capability
Capability flags.
Definition: ieee80211.h:1118
struct ieee80211_ie_channels_channel_band channels[0]
List of (start, length) channel bands we can use.
Definition: ieee80211.h:750
u16 version
RSN information element version.
Definition: ieee80211.h:806
u8 len
Power Capability length: 2.
Definition: ieee80211.h:724
struct ieee80211_ie_rsn rsn
Security information.
Definition: ieee80211.h:1000
u8 len
DS parameter length: 1.
Definition: ieee80211.h:615
u8 len
Channels length: 2.
Definition: ieee80211.h:747
u8 addr2[ETH_ALEN]
Address 2 (immediate sender)
Definition: ieee80211.h:355
u8 id
Power Capability ID: 33.
Definition: ieee80211.h:723
u16 rsn_capab
Security capabilities field (RSN only)
Definition: ieee80211.h:824
u8 challenge_text[0]
Challenge text data.
Definition: ieee80211.h:982
union ieee80211_ie info_element[0]
List of information elements.
Definition: ieee80211.h:1134
u8 first
Differentiator between band and ext triplets.
Definition: ieee80211.h:644
u8 id
Vendor-specific ID: 221.
Definition: ieee80211.h:953
u8 erp_info
ERP flags.
Definition: ieee80211.h:764
802.11 Channels information element
Definition: ieee80211.h:745
u32 oui
OUI and vendor-specific type byte.
Definition: ieee80211.h:955
struct ieee80211_ie_channels_channel_band channels[0]
List of channels.
Definition: ieee80211.h:986
char ssid[0]
SSID data, not NUL-terminated.
Definition: ieee80211.h:578
An 802.11 data or management frame without QoS or WDS header fields.
Definition: ieee80211.h:300
u8 id
Country information ID: 7.
Definition: ieee80211.h:658
802.11 Country information element regulatory extension triplet
Definition: ieee80211.h:624
u8 id
DS parameter ID: 3.
Definition: ieee80211.h:614
char name[2]
ISO Alpha2 country code.
Definition: ieee80211.h:660
struct ieee80211_ie_country_ext_triplet ext
Regulatory extension information.
Definition: ieee80211.h:650
u8 addr1[ETH_ALEN]
Address 1 (immediate receiver)
Definition: ieee80211.h:354
u16 duration
Microseconds to reserve link.
Definition: ieee80211.h:365
u8 addr1[ETH_ALEN]
Address 1 (immediate receiver)
Definition: ieee80211.h:304
union ieee80211_ie_country_triplet __attribute__
u8 request[0]
List of IEs requested.
Definition: ieee80211.h:679
u16 tx_seq
Sequence number of this frame; first from client to AP is 1.
Definition: ieee80211.h:1144
Reassociation request frame data.
Definition: ieee80211.h:1115
802.11 rates information element
Definition: ieee80211.h:593
802.11 Vendor Specific information element
Definition: ieee80211.h:952
802.11 Country information element regulatory triplet
Definition: ieee80211.h:642
char in_out
'I' for indoor, 'O' for outdoor
Definition: ieee80211.h:661
u8 id
Information element ID.
Definition: ieee80211.h:800
u16 pmkid_count
Number of PMKIDs included (present only in association frames)
Definition: ieee80211.h:827
u8 addr3[ETH_ALEN]
Address 3 (often "forward to")
Definition: ieee80211.h:306
static size_t ieee80211_rsn_size(int npair, int nauth, int npmkid, int rsn_ie)
Calculate necessary size of RSN information element.
Definition: ieee80211.h:844
u32 group_cipher
Cipher ID for the cipher used in multicast/broadcast frames.
Definition: ieee80211.h:809
u16 status
Status code.
Definition: ieee80211.h:1147
u8 current_addr[ETH_ALEN]
MAC address of current Access Point.
Definition: ieee80211.h:1124
union ieee80211_ie_country_triplet triplet[0]
List of regulatory triplets.
Definition: ieee80211.h:664
struct ieee80211_ie_ds_param ds_param
DS parameter set.
Definition: ieee80211.h:991
Generic 802.11 information element header.
Definition: ieee80211.h:568
802.11 SSID information element
Definition: ieee80211.h:575
u8 oui[3]
Organization code, usually 0.
Definition: ieee80211.h:332
u8 id
Information element ID.
Definition: ieee80211.h:976
802.11 Country information element regulatory band triplet
Definition: ieee80211.h:631
u8 dsap
Destination SAP ID.
Definition: ieee80211.h:327
u8 len
Vendor-specific length: variable.
Definition: ieee80211.h:954
802.11 Power Constraint information element
Definition: ieee80211.h:706
u8 nr_channels
Number of contiguous channels in band.
Definition: ieee80211.h:633
u16 algorithm
Authentication algorithm (Open System or Shared Key)
Definition: ieee80211.h:1141
16-byte RTS frame format, with abbreviated header
Definition: ieee80211.h:350
uint64_t u64
Definition: stdint.h:25
u8 id
Information element ID.
Definition: ieee80211.h:569
u8 len
ERP Information length: 1.
Definition: ieee80211.h:763
u8 coverage_class
Coverage class.
Definition: ieee80211.h:627
u8 rates[0]
Rates data.
Definition: ieee80211.h:980
Probe request frame data.
Definition: ieee80211.h:1131
u8 data[0]
Vendor-specific data.
Definition: ieee80211.h:956
union ieee80211_ie info_element[0]
List of information elements.
Definition: ieee80211.h:1150
u8 power_constraint
Power constraint, dBm.
Definition: ieee80211.h:983
u8 challenge_text[0]
Challenge Text data.
Definition: ieee80211.h:694
Beacon or probe response frame data.
Definition: ieee80211.h:1054
u16 akm_count
Number of authentication types supported.
Definition: ieee80211.h:818
u8 len
Power Constraint length: 1.
Definition: ieee80211.h:708
struct ieee80211_ie_power_capab power_capab
Power capability.
Definition: ieee80211.h:997
u8 id
Power Constraint ID: 52.
Definition: ieee80211.h:707
u32 pairwise_cipher[1]
List of cipher IDs for supported unicast frame ciphers.
Definition: ieee80211.h:815
u8 reg_class_id
Regulatory class ID.
Definition: ieee80211.h:626
u16 duration
Microseconds to reserve link.
Definition: ieee80211.h:353
u16 listen_interval
Interval at which we wake up, in units of the beacon interval.
Definition: ieee80211.h:1121
802.11 ERP Information information element
Definition: ieee80211.h:761
u8 addr1[ETH_ALEN]
Address 1 (immediate receiver)
Definition: ieee80211.h:366
struct ieee80211_ie_vendor vendor
Vendor-specific.
Definition: ieee80211.h:1003
u8 len
Country information length: varies.
Definition: ieee80211.h:659
802.11 Challenge Text information element
Definition: ieee80211.h:691
static int ieee80211_ie_bound(union ieee80211_ie *ie, void *end)
Check that 802.11 information element is bounded by buffer.
Definition: ieee80211.h:1012
u8 first_channel
Channel number for first channel in band.
Definition: ieee80211.h:632
u8 nr_channels
Number of channels in band.
Definition: ieee80211.h:736
u16 capability
Capability flags.
Definition: ieee80211.h:1099
802.11 Channels information element channel band tuple
Definition: ieee80211.h:734
u16 seq
802.11 Sequence Control field
Definition: ieee80211.h:307
u16 pairwise_count
Number of unicast ciphers supported.
Definition: ieee80211.h:812
u16 capability
Capability flags.
Definition: ieee80211.h:1086
#define ETH_ALEN
Definition: if_ether.h:8
Any 802.11 information element.
Definition: ieee80211.h:972
u8 len
Information element length.
Definition: ieee80211.h:803
u8 len
Information element data length.
Definition: ieee80211.h:977
union ieee80211_ie info_element[0]
List of information elements.
Definition: ieee80211.h:1066
802.11 Request information element
Definition: ieee80211.h:676
struct ieee80211_ie_country country
Country information.
Definition: ieee80211.h:994
u8 len
Challenge Text length: usually 128.
Definition: ieee80211.h:693
u8 id
Request ID: 10.
Definition: ieee80211.h:677
u8 id
Channels ID: 36.
Definition: ieee80211.h:746
FILE_LICENCE(GPL2_OR_LATER)
u8 first_channel
Channel number of first channel in band.
Definition: ieee80211.h:735
802.11 Robust Security Network ("WPA") information element
Definition: ieee80211.h:798
u8 len
Number of rates.
Definition: ieee80211.h:595
u8 min_txpower
Minimum possible TX power, dBm.
Definition: ieee80211.h:725
802.11 Direct Spectrum parameter information element
Definition: ieee80211.h:613
u8 id
Rates ID: 1 or 50.
Definition: ieee80211.h:594
u16 fc
802.11 Frame Control field
Definition: ieee80211.h:364
u8 len
SSID length.
Definition: ieee80211.h:577
Authentication frame data.
Definition: ieee80211.h:1138
u8 id
SSID ID: 0.
Definition: ieee80211.h:576
u64 timestamp
802.11 TSFT value at frame send
Definition: ieee80211.h:1057
u8 len
Information element length.
Definition: ieee80211.h:570
802.11 Country information element
Definition: ieee80211.h:657
u8 ctrl
Control information.
Definition: ieee80211.h:329
u8 ssap
Source SAP ID.
Definition: ieee80211.h:328
u8 reg_ext_id
Regulatory extension ID.
Definition: ieee80211.h:625
u8 erp_info
ERP information flags.
Definition: ieee80211.h:984
struct ieee80211_ie_country_band_triplet band
Information about a band of channels.
Definition: ieee80211.h:647
Association request frame data.
Definition: ieee80211.h:1083
u16 capability
Capability flags.
Definition: ieee80211.h:1063
uint32_t end
Ending offset.
Definition: netvsc.h:18
802.11 Power Capability information element
Definition: ieee80211.h:722
u8 max_txpower
Maximum possible TX power, dBm.
Definition: ieee80211.h:726
u8 len
Number of IEs requested.
Definition: ieee80211.h:678
char ssid[0]
SSID text.
Definition: ieee80211.h:979
u8 pmkid_list[0]
List of PMKIDs included, each a 16-byte SHA1 hash.
Definition: ieee80211.h:830
union ieee80211_ie info_element[0]
List of information elements.
Definition: ieee80211.h:1127
u16 fc
802.11 Frame Control field
Definition: ieee80211.h:352
union ieee80211_ie info_element[0]
List of information elements.
Definition: ieee80211.h:1092
u16 beacon_interval
Interval at which beacons are sent, in units of 1024 us.
Definition: ieee80211.h:1060
#define NULL
NULL pointer (VOID *)
Definition: Base.h:362
u16 listen_interval
Interval at which we wake up, in units of the beacon interval.
Definition: ieee80211.h:1089
u8 data[0]
Beginning of frame data.
Definition: ieee80211.h:308
uint8_t u8
Definition: stdint.h:19
u8 request[0]
Request list.
Definition: ieee80211.h:981
uint32_t u32
Definition: stdint.h:23
10-byte CTS or ACK frame format, with abbreviated header
Definition: ieee80211.h:362
u8 current_channel
Current channel number, 1-14.
Definition: ieee80211.h:616
u8 id
ERP Information ID: 42.
Definition: ieee80211.h:762
if(natsemi->flags &NATSEMI_64BIT) return 1
u8 max_txpower
Maximum TX power in dBm.
Definition: ieee80211.h:634
u16 duration
Microseconds to reserve link.
Definition: ieee80211.h:303
u8 addr2[ETH_ALEN]
Address 2 (immediate sender)
Definition: ieee80211.h:305