3 * Macros, types, and functions to handle 802.11 mgmt frames
5 * Copyright (C) 1999 AbsoluteValue Systems, Inc. All Rights Reserved.
6 * --------------------------------------------------------------------
10 * The contents of this file are subject to the Mozilla Public
11 * License Version 1.1 (the "License"); you may not use this file
12 * except in compliance with the License. You may obtain a copy of
13 * the License at http://www.mozilla.org/MPL/
15 * Software distributed under the License is distributed on an "AS
16 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
17 * implied. See the License for the specific language governing
18 * rights and limitations under the License.
20 * Alternatively, the contents of this file may be used under the
21 * terms of the GNU Public License version 2 (the "GPL"), in which
22 * case the provisions of the GPL are applicable instead of the
23 * above. If you wish to allow the use of your version of this file
24 * only under the terms of the GPL and not to allow others to use
25 * your version of this file under the MPL, indicate your decision
26 * by deleting the provisions above and replace them with the notice
27 * and other provisions required by the GPL. If you do not delete
28 * the provisions above, a recipient may use your version of this
29 * file under either the MPL or the GPL.
31 * --------------------------------------------------------------------
33 * Inquiries regarding the linux-wlan Open Source project can be
36 * AbsoluteValue Systems Inc.
38 * http://www.linux-wlan.com
40 * --------------------------------------------------------------------
42 * Portions of the development of this software were funded by
43 * Intersil Corporation as part of PRISM(R) chipset product development.
45 * --------------------------------------------------------------------
47 * This file declares the constants and types used in the interface
48 * between a wlan driver and the user mode utilities.
51 * - Constant values are always in HOST byte order. To assign
52 * values to multi-byte fields they _must_ be converted to
53 * ieee byte order. To retrieve multi-byte values from incoming
54 * frames, they must be converted to host order.
56 * - The len member of the frame structure does NOT!!! include
57 * the MAC CRC. Therefore, the len field on rx'd frames should
58 * have 4 subtracted from it.
60 * All functions declared here are implemented in p80211.c
62 * The types, macros, and functions defined here are primarily
63 * used for encoding and decoding management frames. They are
64 * designed to follow these patterns of use:
67 * 1) a frame of length len is received into buffer b
68 * 2) using the hdr structure and macros, we determine the type
69 * 3) an appropriate mgmt frame structure, mf, is allocated and zeroed
73 * 5) call mgmt_decode( mf )
74 * 6) the frame field pointers in mf are now set. Note that any
75 * multi-byte frame field values accessed using the frame field
76 * pointers are in ieee byte order and will have to be converted
80 * 1) Library client allocates buffer space for maximum length
81 * frame of the desired type
82 * 2) Library client allocates a mgmt frame structure, called mf,
84 * 3) Set the following:
85 * mf.type = <desired type>
86 * mf.buf = <allocated buffer address>
87 * 4) call mgmt_encode( mf )
88 * 5) all of the fixed field pointers and fixed length information element
89 * pointers in mf are now set to their respective locations in the
90 * allocated space (fortunately, all variable length information elements
91 * fall at the end of their respective frames).
92 * 5a) The length field is set to include the last of the fixed and fixed
93 * length fields. It may have to be updated for optional or variable
94 * length information elements.
95 * 6) Optional and variable length information elements are special cases
96 * and must be handled individually by the client code.
97 * --------------------------------------------------------------------
100 #ifndef _P80211MGMT_H
101 #define _P80211MGMT_H
103 /*================================================================*/
104 /* Project Includes */
108 #include "p80211hdr.h"
112 /*================================================================*/
115 /*-- Information Element IDs --------------------*/
116 #define WLAN_EID_SSID 0
117 #define WLAN_EID_SUPP_RATES 1
118 #define WLAN_EID_FH_PARMS 2
119 #define WLAN_EID_DS_PARMS 3
120 #define WLAN_EID_CF_PARMS 4
121 #define WLAN_EID_TIM 5
122 #define WLAN_EID_IBSS_PARMS 6
123 /*-- values 7-15 reserved --*/
124 #define WLAN_EID_CHALLENGE 16
125 /*-- values 17-31 reserved for challenge text extension --*/
126 /*-- values 32-255 reserved --*/
128 /*-- Reason Codes -------------------------------*/
129 #define WLAN_MGMT_REASON_RSVD 0
130 #define WLAN_MGMT_REASON_UNSPEC 1
131 #define WLAN_MGMT_REASON_PRIOR_AUTH_INVALID 2
132 #define WLAN_MGMT_REASON_DEAUTH_LEAVING 3
133 #define WLAN_MGMT_REASON_DISASSOC_INACTIVE 4
134 #define WLAN_MGMT_REASON_DISASSOC_AP_BUSY 5
135 #define WLAN_MGMT_REASON_CLASS2_NONAUTH 6
136 #define WLAN_MGMT_REASON_CLASS3_NONASSOC 7
137 #define WLAN_MGMT_REASON_DISASSOC_STA_HASLEFT 8
138 #define WLAN_MGMT_REASON_CANT_ASSOC_NONAUTH 9
140 /*-- Status Codes -------------------------------*/
141 #define WLAN_MGMT_STATUS_SUCCESS 0
142 #define WLAN_MGMT_STATUS_UNSPEC_FAILURE 1
143 #define WLAN_MGMT_STATUS_CAPS_UNSUPPORTED 10
144 #define WLAN_MGMT_STATUS_REASSOC_NO_ASSOC 11
145 #define WLAN_MGMT_STATUS_ASSOC_DENIED_UNSPEC 12
146 #define WLAN_MGMT_STATUS_UNSUPPORTED_AUTHALG 13
147 #define WLAN_MGMT_STATUS_RX_AUTH_NOSEQ 14
148 #define WLAN_MGMT_STATUS_CHALLENGE_FAIL 15
149 #define WLAN_MGMT_STATUS_AUTH_TIMEOUT 16
150 #define WLAN_MGMT_STATUS_ASSOC_DENIED_BUSY 17
151 #define WLAN_MGMT_STATUS_ASSOC_DENIED_RATES 18
152 /* p80211b additions */
153 #define WLAN_MGMT_STATUS_ASSOC_DENIED_NOSHORT 19
154 #define WLAN_MGMT_STATUS_ASSOC_DENIED_NOPBCC 20
155 #define WLAN_MGMT_STATUS_ASSOC_DENIED_NOAGILITY 21
157 /*-- Auth Algorithm Field ---------------------------*/
158 #define WLAN_AUTH_ALG_OPENSYSTEM 0
159 #define WLAN_AUTH_ALG_SHAREDKEY 1
161 /*-- Management Frame Field Offsets -------------*/
162 /* Note: Not all fields are listed because of variable lengths, */
163 /* see the code in p80211.c to see how we search for fields */
164 /* Note: These offsets are from the start of the frame data */
166 #define WLAN_BEACON_OFF_TS 0
167 #define WLAN_BEACON_OFF_BCN_int 8
168 #define WLAN_BEACON_OFF_CAPINFO 10
169 #define WLAN_BEACON_OFF_SSID 12
171 #define WLAN_DISASSOC_OFF_REASON 0
173 #define WLAN_ASSOCREQ_OFF_CAP_INFO 0
174 #define WLAN_ASSOCREQ_OFF_LISTEN_int 2
175 #define WLAN_ASSOCREQ_OFF_SSID 4
177 #define WLAN_ASSOCRESP_OFF_CAP_INFO 0
178 #define WLAN_ASSOCRESP_OFF_STATUS 2
179 #define WLAN_ASSOCRESP_OFF_AID 4
180 #define WLAN_ASSOCRESP_OFF_SUPP_RATES 6
182 #define WLAN_REASSOCREQ_OFF_CAP_INFO 0
183 #define WLAN_REASSOCREQ_OFF_LISTEN_int 2
184 #define WLAN_REASSOCREQ_OFF_CURR_AP 4
185 #define WLAN_REASSOCREQ_OFF_SSID 10
187 #define WLAN_REASSOCRESP_OFF_CAP_INFO 0
188 #define WLAN_REASSOCRESP_OFF_STATUS 2
189 #define WLAN_REASSOCRESP_OFF_AID 4
190 #define WLAN_REASSOCRESP_OFF_SUPP_RATES 6
192 #define WLAN_PROBEREQ_OFF_SSID 0
194 #define WLAN_PROBERESP_OFF_TS 0
195 #define WLAN_PROBERESP_OFF_BCN_int 8
196 #define WLAN_PROBERESP_OFF_CAP_INFO 10
197 #define WLAN_PROBERESP_OFF_SSID 12
199 #define WLAN_AUTHEN_OFF_AUTH_ALG 0
200 #define WLAN_AUTHEN_OFF_AUTH_SEQ 2
201 #define WLAN_AUTHEN_OFF_STATUS 4
202 #define WLAN_AUTHEN_OFF_CHALLENGE 6
204 #define WLAN_DEAUTHEN_OFF_REASON 0
206 /*-- Capability Field ---------------------------*/
207 #define WLAN_GET_MGMT_CAP_INFO_ESS(n) ((n) & BIT(0))
208 #define WLAN_GET_MGMT_CAP_INFO_IBSS(n) (((n) & BIT(1)) >> 1)
209 #define WLAN_GET_MGMT_CAP_INFO_CFPOLLABLE(n) (((n) & BIT(2)) >> 2)
210 #define WLAN_GET_MGMT_CAP_INFO_CFPOLLREQ(n) (((n) & BIT(3)) >> 3)
211 #define WLAN_GET_MGMT_CAP_INFO_PRIVACY(n) (((n) & BIT(4)) >> 4)
212 /* p80211b additions */
213 #define WLAN_GET_MGMT_CAP_INFO_SHORT(n) (((n) & BIT(5)) >> 5)
214 #define WLAN_GET_MGMT_CAP_INFO_PBCC(n) (((n) & BIT(6)) >> 6)
215 #define WLAN_GET_MGMT_CAP_INFO_AGILITY(n) (((n) & BIT(7)) >> 7)
217 #define WLAN_SET_MGMT_CAP_INFO_ESS(n) (n)
218 #define WLAN_SET_MGMT_CAP_INFO_IBSS(n) ((n) << 1)
219 #define WLAN_SET_MGMT_CAP_INFO_CFPOLLABLE(n) ((n) << 2)
220 #define WLAN_SET_MGMT_CAP_INFO_CFPOLLREQ(n) ((n) << 3)
221 #define WLAN_SET_MGMT_CAP_INFO_PRIVACY(n) ((n) << 4)
222 /* p80211b additions */
223 #define WLAN_SET_MGMT_CAP_INFO_SHORT(n) ((n) << 5)
224 #define WLAN_SET_MGMT_CAP_INFO_PBCC(n) ((n) << 6)
225 #define WLAN_SET_MGMT_CAP_INFO_AGILITY(n) ((n) << 7)
227 /*-- Information Element Types --------------------*/
228 /* prototype structure, all IEs start with these members */
230 typedef struct wlan_ie {
233 } __attribute__ ((packed)) wlan_ie_t;
235 /*-- Service Set Identity (SSID) -----------------*/
236 typedef struct wlan_ie_ssid {
239 u8 ssid[1]; /* may be zero, ptrs may overlap */
240 } __attribute__ ((packed)) wlan_ie_ssid_t;
242 /*-- Supported Rates -----------------------------*/
243 typedef struct wlan_ie_supp_rates {
246 u8 rates[1]; /* had better be at LEAST one! */
247 } __attribute__ ((packed)) wlan_ie_supp_rates_t;
249 /*-- FH Parameter Set ----------------------------*/
250 typedef struct wlan_ie_fh_parms {
257 } __attribute__ ((packed)) wlan_ie_fh_parms_t;
259 /*-- DS Parameter Set ----------------------------*/
260 typedef struct wlan_ie_ds_parms {
264 } __attribute__ ((packed)) wlan_ie_ds_parms_t;
266 /*-- CF Parameter Set ----------------------------*/
268 typedef struct wlan_ie_cf_parms {
274 u16 cfp_durremaining;
275 } __attribute__ ((packed)) wlan_ie_cf_parms_t;
277 /*-- TIM ------------------------------------------*/
278 typedef struct wlan_ie_tim {
285 } __attribute__ ((packed)) wlan_ie_tim_t;
287 /*-- IBSS Parameter Set ---------------------------*/
288 typedef struct wlan_ie_ibss_parms {
292 } __attribute__ ((packed)) wlan_ie_ibss_parms_t;
294 /*-- Challenge Text ------------------------------*/
295 typedef struct wlan_ie_challenge {
299 } __attribute__ ((packed)) wlan_ie_challenge_t;
301 /*-------------------------------------------------*/
304 /* prototype structure, all mgmt frame types will start with these members */
305 typedef struct wlan_fr_mgmt {
307 u16 len; /* DOES NOT include CRC !!!! */
310 /* used for target specific data, skb in Linux */
312 /*-- fixed fields -----------*/
313 /*-- info elements ----------*/
316 /*-- Beacon ---------------------------------------*/
317 typedef struct wlan_fr_beacon {
322 /* used for target specific data, skb in Linux */
324 /*-- fixed fields -----------*/
328 /*-- info elements ----------*/
329 wlan_ie_ssid_t *ssid;
330 wlan_ie_supp_rates_t *supp_rates;
331 wlan_ie_fh_parms_t *fh_parms;
332 wlan_ie_ds_parms_t *ds_parms;
333 wlan_ie_cf_parms_t *cf_parms;
334 wlan_ie_ibss_parms_t *ibss_parms;
339 /*-- IBSS ATIM ------------------------------------*/
340 typedef struct wlan_fr_ibssatim {
345 /* used for target specific data, skb in Linux */
348 /*-- fixed fields -----------*/
349 /*-- info elements ----------*/
351 /* this frame type has a null body */
353 } wlan_fr_ibssatim_t;
355 /*-- Disassociation -------------------------------*/
356 typedef struct wlan_fr_disassoc {
361 /* used for target specific data, skb in Linux */
363 /*-- fixed fields -----------*/
366 /*-- info elements ----------*/
368 } wlan_fr_disassoc_t;
370 /*-- Association Request --------------------------*/
371 typedef struct wlan_fr_assocreq {
376 /* used for target specific data, skb in Linux */
378 /*-- fixed fields -----------*/
381 /*-- info elements ----------*/
382 wlan_ie_ssid_t *ssid;
383 wlan_ie_supp_rates_t *supp_rates;
385 } wlan_fr_assocreq_t;
387 /*-- Association Response -------------------------*/
388 typedef struct wlan_fr_assocresp {
393 /* used for target specific data, skb in Linux */
395 /*-- fixed fields -----------*/
399 /*-- info elements ----------*/
400 wlan_ie_supp_rates_t *supp_rates;
402 } wlan_fr_assocresp_t;
404 /*-- Reassociation Request ------------------------*/
405 typedef struct wlan_fr_reassocreq {
410 /* used for target specific data, skb in Linux */
412 /*-- fixed fields -----------*/
416 /*-- info elements ----------*/
417 wlan_ie_ssid_t *ssid;
418 wlan_ie_supp_rates_t *supp_rates;
420 } wlan_fr_reassocreq_t;
422 /*-- Reassociation Response -----------------------*/
423 typedef struct wlan_fr_reassocresp {
428 /* used for target specific data, skb in Linux */
430 /*-- fixed fields -----------*/
434 /*-- info elements ----------*/
435 wlan_ie_supp_rates_t *supp_rates;
437 } wlan_fr_reassocresp_t;
439 /*-- Probe Request --------------------------------*/
440 typedef struct wlan_fr_probereq {
445 /* used for target specific data, skb in Linux */
447 /*-- fixed fields -----------*/
448 /*-- info elements ----------*/
449 wlan_ie_ssid_t *ssid;
450 wlan_ie_supp_rates_t *supp_rates;
452 } wlan_fr_probereq_t;
454 /*-- Probe Response -------------------------------*/
455 typedef struct wlan_fr_proberesp {
460 /* used for target specific data, skb in Linux */
462 /*-- fixed fields -----------*/
466 /*-- info elements ----------*/
467 wlan_ie_ssid_t *ssid;
468 wlan_ie_supp_rates_t *supp_rates;
469 wlan_ie_fh_parms_t *fh_parms;
470 wlan_ie_ds_parms_t *ds_parms;
471 wlan_ie_cf_parms_t *cf_parms;
472 wlan_ie_ibss_parms_t *ibss_parms;
473 } wlan_fr_proberesp_t;
475 /*-- Authentication -------------------------------*/
476 typedef struct wlan_fr_authen {
481 /* used for target specific data, skb in Linux */
483 /*-- fixed fields -----------*/
487 /*-- info elements ----------*/
488 wlan_ie_challenge_t *challenge;
492 /*-- Deauthenication -----------------------------*/
493 typedef struct wlan_fr_deauthen {
498 /* used for target specific data, skb in Linux */
500 /*-- fixed fields -----------*/
503 /*-- info elements ----------*/
505 } wlan_fr_deauthen_t;
507 void wlan_mgmt_encode_beacon(wlan_fr_beacon_t *f);
508 void wlan_mgmt_decode_beacon(wlan_fr_beacon_t *f);
509 void wlan_mgmt_encode_disassoc(wlan_fr_disassoc_t *f);
510 void wlan_mgmt_decode_disassoc(wlan_fr_disassoc_t *f);
511 void wlan_mgmt_encode_assocreq(wlan_fr_assocreq_t *f);
512 void wlan_mgmt_decode_assocreq(wlan_fr_assocreq_t *f);
513 void wlan_mgmt_encode_assocresp(wlan_fr_assocresp_t *f);
514 void wlan_mgmt_decode_assocresp(wlan_fr_assocresp_t *f);
515 void wlan_mgmt_encode_reassocreq(wlan_fr_reassocreq_t *f);
516 void wlan_mgmt_decode_reassocreq(wlan_fr_reassocreq_t *f);
517 void wlan_mgmt_encode_reassocresp(wlan_fr_reassocresp_t *f);
518 void wlan_mgmt_decode_reassocresp(wlan_fr_reassocresp_t *f);
519 void wlan_mgmt_encode_probereq(wlan_fr_probereq_t *f);
520 void wlan_mgmt_decode_probereq(wlan_fr_probereq_t *f);
521 void wlan_mgmt_encode_proberesp(wlan_fr_proberesp_t *f);
522 void wlan_mgmt_decode_proberesp(wlan_fr_proberesp_t *f);
523 void wlan_mgmt_encode_authen(wlan_fr_authen_t *f);
524 void wlan_mgmt_decode_authen(wlan_fr_authen_t *f);
525 void wlan_mgmt_encode_deauthen(wlan_fr_deauthen_t *f);
526 void wlan_mgmt_decode_deauthen(wlan_fr_deauthen_t *f);
528 #endif /* _P80211MGMT_H */