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 */
107 #include "p80211hdr.h"
110 /*================================================================*/
113 /*-- Information Element IDs --------------------*/
114 #define WLAN_EID_SSID 0
115 #define WLAN_EID_SUPP_RATES 1
116 #define WLAN_EID_FH_PARMS 2
117 #define WLAN_EID_DS_PARMS 3
118 #define WLAN_EID_CF_PARMS 4
119 #define WLAN_EID_TIM 5
120 #define WLAN_EID_IBSS_PARMS 6
121 /*-- values 7-15 reserved --*/
122 #define WLAN_EID_CHALLENGE 16
123 /*-- values 17-31 reserved for challenge text extension --*/
124 /*-- values 32-255 reserved --*/
126 /*-- Reason Codes -------------------------------*/
127 #define WLAN_MGMT_REASON_RSVD 0
128 #define WLAN_MGMT_REASON_UNSPEC 1
129 #define WLAN_MGMT_REASON_PRIOR_AUTH_INVALID 2
130 #define WLAN_MGMT_REASON_DEAUTH_LEAVING 3
131 #define WLAN_MGMT_REASON_DISASSOC_INACTIVE 4
132 #define WLAN_MGMT_REASON_DISASSOC_AP_BUSY 5
133 #define WLAN_MGMT_REASON_CLASS2_NONAUTH 6
134 #define WLAN_MGMT_REASON_CLASS3_NONASSOC 7
135 #define WLAN_MGMT_REASON_DISASSOC_STA_HASLEFT 8
136 #define WLAN_MGMT_REASON_CANT_ASSOC_NONAUTH 9
138 /*-- Status Codes -------------------------------*/
139 #define WLAN_MGMT_STATUS_SUCCESS 0
140 #define WLAN_MGMT_STATUS_UNSPEC_FAILURE 1
141 #define WLAN_MGMT_STATUS_CAPS_UNSUPPORTED 10
142 #define WLAN_MGMT_STATUS_REASSOC_NO_ASSOC 11
143 #define WLAN_MGMT_STATUS_ASSOC_DENIED_UNSPEC 12
144 #define WLAN_MGMT_STATUS_UNSUPPORTED_AUTHALG 13
145 #define WLAN_MGMT_STATUS_RX_AUTH_NOSEQ 14
146 #define WLAN_MGMT_STATUS_CHALLENGE_FAIL 15
147 #define WLAN_MGMT_STATUS_AUTH_TIMEOUT 16
148 #define WLAN_MGMT_STATUS_ASSOC_DENIED_BUSY 17
149 #define WLAN_MGMT_STATUS_ASSOC_DENIED_RATES 18
150 /* p80211b additions */
151 #define WLAN_MGMT_STATUS_ASSOC_DENIED_NOSHORT 19
152 #define WLAN_MGMT_STATUS_ASSOC_DENIED_NOPBCC 20
153 #define WLAN_MGMT_STATUS_ASSOC_DENIED_NOAGILITY 21
155 /*-- Auth Algorithm Field ---------------------------*/
156 #define WLAN_AUTH_ALG_OPENSYSTEM 0
157 #define WLAN_AUTH_ALG_SHAREDKEY 1
159 /*-- Management Frame Field Offsets -------------*/
160 /* Note: Not all fields are listed because of variable lengths, */
161 /* see the code in p80211.c to see how we search for fields */
162 /* Note: These offsets are from the start of the frame data */
164 #define WLAN_BEACON_OFF_TS 0
165 #define WLAN_BEACON_OFF_BCN_int 8
166 #define WLAN_BEACON_OFF_CAPINFO 10
167 #define WLAN_BEACON_OFF_SSID 12
169 #define WLAN_DISASSOC_OFF_REASON 0
171 #define WLAN_ASSOCREQ_OFF_CAP_INFO 0
172 #define WLAN_ASSOCREQ_OFF_LISTEN_int 2
173 #define WLAN_ASSOCREQ_OFF_SSID 4
175 #define WLAN_ASSOCRESP_OFF_CAP_INFO 0
176 #define WLAN_ASSOCRESP_OFF_STATUS 2
177 #define WLAN_ASSOCRESP_OFF_AID 4
178 #define WLAN_ASSOCRESP_OFF_SUPP_RATES 6
180 #define WLAN_REASSOCREQ_OFF_CAP_INFO 0
181 #define WLAN_REASSOCREQ_OFF_LISTEN_int 2
182 #define WLAN_REASSOCREQ_OFF_CURR_AP 4
183 #define WLAN_REASSOCREQ_OFF_SSID 10
185 #define WLAN_REASSOCRESP_OFF_CAP_INFO 0
186 #define WLAN_REASSOCRESP_OFF_STATUS 2
187 #define WLAN_REASSOCRESP_OFF_AID 4
188 #define WLAN_REASSOCRESP_OFF_SUPP_RATES 6
190 #define WLAN_PROBEREQ_OFF_SSID 0
192 #define WLAN_PROBERESP_OFF_TS 0
193 #define WLAN_PROBERESP_OFF_BCN_int 8
194 #define WLAN_PROBERESP_OFF_CAP_INFO 10
195 #define WLAN_PROBERESP_OFF_SSID 12
197 #define WLAN_AUTHEN_OFF_AUTH_ALG 0
198 #define WLAN_AUTHEN_OFF_AUTH_SEQ 2
199 #define WLAN_AUTHEN_OFF_STATUS 4
200 #define WLAN_AUTHEN_OFF_CHALLENGE 6
202 #define WLAN_DEAUTHEN_OFF_REASON 0
204 /*-- Capability Field ---------------------------*/
205 #define WLAN_GET_MGMT_CAP_INFO_ESS(n) ((n) & BIT(0))
206 #define WLAN_GET_MGMT_CAP_INFO_IBSS(n) (((n) & BIT(1)) >> 1)
207 #define WLAN_GET_MGMT_CAP_INFO_CFPOLLABLE(n) (((n) & BIT(2)) >> 2)
208 #define WLAN_GET_MGMT_CAP_INFO_CFPOLLREQ(n) (((n) & BIT(3)) >> 3)
209 #define WLAN_GET_MGMT_CAP_INFO_PRIVACY(n) (((n) & BIT(4)) >> 4)
210 /* p80211b additions */
211 #define WLAN_GET_MGMT_CAP_INFO_SHORT(n) (((n) & BIT(5)) >> 5)
212 #define WLAN_GET_MGMT_CAP_INFO_PBCC(n) (((n) & BIT(6)) >> 6)
213 #define WLAN_GET_MGMT_CAP_INFO_AGILITY(n) (((n) & BIT(7)) >> 7)
215 #define WLAN_SET_MGMT_CAP_INFO_ESS(n) (n)
216 #define WLAN_SET_MGMT_CAP_INFO_IBSS(n) ((n) << 1)
217 #define WLAN_SET_MGMT_CAP_INFO_CFPOLLABLE(n) ((n) << 2)
218 #define WLAN_SET_MGMT_CAP_INFO_CFPOLLREQ(n) ((n) << 3)
219 #define WLAN_SET_MGMT_CAP_INFO_PRIVACY(n) ((n) << 4)
220 /* p80211b additions */
221 #define WLAN_SET_MGMT_CAP_INFO_SHORT(n) ((n) << 5)
222 #define WLAN_SET_MGMT_CAP_INFO_PBCC(n) ((n) << 6)
223 #define WLAN_SET_MGMT_CAP_INFO_AGILITY(n) ((n) << 7)
225 /*-- Information Element Types --------------------*/
226 /* prototype structure, all IEs start with these members */
228 typedef struct wlan_ie {
231 } __attribute__ ((packed)) wlan_ie_t;
233 /*-- Service Set Identity (SSID) -----------------*/
234 typedef struct wlan_ie_ssid {
237 u8 ssid[1]; /* may be zero, ptrs may overlap */
238 } __attribute__ ((packed)) wlan_ie_ssid_t;
240 /*-- Supported Rates -----------------------------*/
241 typedef struct wlan_ie_supp_rates {
244 u8 rates[1]; /* had better be at LEAST one! */
245 } __attribute__ ((packed)) wlan_ie_supp_rates_t;
247 /*-- FH Parameter Set ----------------------------*/
248 typedef struct wlan_ie_fh_parms {
255 } __attribute__ ((packed)) wlan_ie_fh_parms_t;
257 /*-- DS Parameter Set ----------------------------*/
258 typedef struct wlan_ie_ds_parms {
262 } __attribute__ ((packed)) wlan_ie_ds_parms_t;
264 /*-- CF Parameter Set ----------------------------*/
266 typedef struct wlan_ie_cf_parms {
272 u16 cfp_durremaining;
273 } __attribute__ ((packed)) wlan_ie_cf_parms_t;
275 /*-- TIM ------------------------------------------*/
276 typedef struct wlan_ie_tim {
283 } __attribute__ ((packed)) wlan_ie_tim_t;
285 /*-- IBSS Parameter Set ---------------------------*/
286 typedef struct wlan_ie_ibss_parms {
290 } __attribute__ ((packed)) wlan_ie_ibss_parms_t;
292 /*-- Challenge Text ------------------------------*/
293 typedef struct wlan_ie_challenge {
297 } __attribute__ ((packed)) wlan_ie_challenge_t;
299 /*-------------------------------------------------*/
302 /* prototype structure, all mgmt frame types will start with these members */
303 typedef struct wlan_fr_mgmt {
305 u16 len; /* DOES NOT include CRC !!!! */
308 /* used for target specific data, skb in Linux */
310 /*-- fixed fields -----------*/
311 /*-- info elements ----------*/
314 /*-- Beacon ---------------------------------------*/
315 typedef struct wlan_fr_beacon {
320 /* used for target specific data, skb in Linux */
322 /*-- fixed fields -----------*/
326 /*-- info elements ----------*/
327 wlan_ie_ssid_t *ssid;
328 wlan_ie_supp_rates_t *supp_rates;
329 wlan_ie_fh_parms_t *fh_parms;
330 wlan_ie_ds_parms_t *ds_parms;
331 wlan_ie_cf_parms_t *cf_parms;
332 wlan_ie_ibss_parms_t *ibss_parms;
337 /*-- IBSS ATIM ------------------------------------*/
338 typedef struct wlan_fr_ibssatim {
343 /* used for target specific data, skb in Linux */
346 /*-- fixed fields -----------*/
347 /*-- info elements ----------*/
349 /* this frame type has a null body */
351 } wlan_fr_ibssatim_t;
353 /*-- Disassociation -------------------------------*/
354 typedef struct wlan_fr_disassoc {
359 /* used for target specific data, skb in Linux */
361 /*-- fixed fields -----------*/
364 /*-- info elements ----------*/
366 } wlan_fr_disassoc_t;
368 /*-- Association Request --------------------------*/
369 typedef struct wlan_fr_assocreq {
374 /* used for target specific data, skb in Linux */
376 /*-- fixed fields -----------*/
379 /*-- info elements ----------*/
380 wlan_ie_ssid_t *ssid;
381 wlan_ie_supp_rates_t *supp_rates;
383 } wlan_fr_assocreq_t;
385 /*-- Association Response -------------------------*/
386 typedef struct wlan_fr_assocresp {
391 /* used for target specific data, skb in Linux */
393 /*-- fixed fields -----------*/
397 /*-- info elements ----------*/
398 wlan_ie_supp_rates_t *supp_rates;
400 } wlan_fr_assocresp_t;
402 /*-- Reassociation Request ------------------------*/
403 typedef struct wlan_fr_reassocreq {
408 /* used for target specific data, skb in Linux */
410 /*-- fixed fields -----------*/
414 /*-- info elements ----------*/
415 wlan_ie_ssid_t *ssid;
416 wlan_ie_supp_rates_t *supp_rates;
418 } wlan_fr_reassocreq_t;
420 /*-- Reassociation Response -----------------------*/
421 typedef struct wlan_fr_reassocresp {
426 /* used for target specific data, skb in Linux */
428 /*-- fixed fields -----------*/
432 /*-- info elements ----------*/
433 wlan_ie_supp_rates_t *supp_rates;
435 } wlan_fr_reassocresp_t;
437 /*-- Probe Request --------------------------------*/
438 typedef struct wlan_fr_probereq {
443 /* used for target specific data, skb in Linux */
445 /*-- fixed fields -----------*/
446 /*-- info elements ----------*/
447 wlan_ie_ssid_t *ssid;
448 wlan_ie_supp_rates_t *supp_rates;
450 } wlan_fr_probereq_t;
452 /*-- Probe Response -------------------------------*/
453 typedef struct wlan_fr_proberesp {
458 /* used for target specific data, skb in Linux */
460 /*-- fixed fields -----------*/
464 /*-- info elements ----------*/
465 wlan_ie_ssid_t *ssid;
466 wlan_ie_supp_rates_t *supp_rates;
467 wlan_ie_fh_parms_t *fh_parms;
468 wlan_ie_ds_parms_t *ds_parms;
469 wlan_ie_cf_parms_t *cf_parms;
470 wlan_ie_ibss_parms_t *ibss_parms;
471 } wlan_fr_proberesp_t;
473 /*-- Authentication -------------------------------*/
474 typedef struct wlan_fr_authen {
479 /* used for target specific data, skb in Linux */
481 /*-- fixed fields -----------*/
485 /*-- info elements ----------*/
486 wlan_ie_challenge_t *challenge;
490 /*-- Deauthenication -----------------------------*/
491 typedef struct wlan_fr_deauthen {
496 /* used for target specific data, skb in Linux */
498 /*-- fixed fields -----------*/
501 /*-- info elements ----------*/
503 } wlan_fr_deauthen_t;
505 void wlan_mgmt_encode_beacon(wlan_fr_beacon_t * f);
506 void wlan_mgmt_decode_beacon(wlan_fr_beacon_t * f);
507 void wlan_mgmt_encode_disassoc(wlan_fr_disassoc_t * f);
508 void wlan_mgmt_decode_disassoc(wlan_fr_disassoc_t * f);
509 void wlan_mgmt_encode_assocreq(wlan_fr_assocreq_t * f);
510 void wlan_mgmt_decode_assocreq(wlan_fr_assocreq_t * f);
511 void wlan_mgmt_encode_assocresp(wlan_fr_assocresp_t * f);
512 void wlan_mgmt_decode_assocresp(wlan_fr_assocresp_t * f);
513 void wlan_mgmt_encode_reassocreq(wlan_fr_reassocreq_t * f);
514 void wlan_mgmt_decode_reassocreq(wlan_fr_reassocreq_t * f);
515 void wlan_mgmt_encode_reassocresp(wlan_fr_reassocresp_t * f);
516 void wlan_mgmt_decode_reassocresp(wlan_fr_reassocresp_t * f);
517 void wlan_mgmt_encode_probereq(wlan_fr_probereq_t * f);
518 void wlan_mgmt_decode_probereq(wlan_fr_probereq_t * f);
519 void wlan_mgmt_encode_proberesp(wlan_fr_proberesp_t * f);
520 void wlan_mgmt_decode_proberesp(wlan_fr_proberesp_t * f);
521 void wlan_mgmt_encode_authen(wlan_fr_authen_t * f);
522 void wlan_mgmt_decode_authen(wlan_fr_authen_t * f);
523 void wlan_mgmt_encode_deauthen(wlan_fr_deauthen_t * f);
524 void wlan_mgmt_decode_deauthen(wlan_fr_deauthen_t * f);
526 #endif /* _P80211MGMT_H */