ieee80211.h

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    1 /*      $NetBSD: ieee80211.h,v 1.5 2003/12/14 09:56:53 dyoung Exp $     */
    2 /*-
    3  * Copyright (c) 2001 Atsushi Onoe
    4  * Copyright (c) 2002, 2003 Sam Leffler, Errno Consulting
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. The name of the author may not be used to endorse or promote products
   16  *    derived from this software without specific prior written permission.
   17  *
   18  * Alternatively, this software may be distributed under the terms of the
   19  * GNU General Public License ("GPL") version 2 as published by the Free
   20  * Software Foundation.
   21  *
   22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   25  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   26  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   27  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   28  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   29  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   30  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   31  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   32  *
   33  * $FreeBSD: src/sys/net80211/ieee80211.h,v 1.3 2003/09/15 19:36:34 sam Exp $
   34  */
   35 #ifndef _NET80211_IEEE80211_H_
   36 #define _NET80211_IEEE80211_H_
   37 
   38 /*
   39  * 802.11 protocol definitions.
   40  */
   41 
   42 #define IEEE80211_ADDR_LEN      6               /* size of 802.11 address */
   43 /* is 802.11 address multicast/broadcast? */
   44 #define IEEE80211_IS_MULTICAST(_a)      (*(_a) & 0x01)
   45 
   46 /* IEEE 802.11 PLCP header */
   47 struct ieee80211_plcp_hdr {
   48         u_int16_t       i_sfd;
   49         u_int8_t        i_signal;
   50         u_int8_t        i_service;
   51         u_int16_t       i_length;
   52         u_int16_t       i_crc;
   53 } __attribute__((__packed__));
   54 
   55 #define IEEE80211_PLCP_SFD      0xF3A0 
   56 #define IEEE80211_PLCP_SERVICE  0x00
   57 
   58 /*
   59  * generic definitions for IEEE 802.11 frames
   60  */
   61 struct ieee80211_frame {
   62         u_int8_t        i_fc[2];
   63         u_int8_t        i_dur[2];
   64         u_int8_t        i_addr1[IEEE80211_ADDR_LEN];
   65         u_int8_t        i_addr2[IEEE80211_ADDR_LEN];
   66         u_int8_t        i_addr3[IEEE80211_ADDR_LEN];
   67         u_int8_t        i_seq[2];
   68         /* possibly followed by addr4[IEEE80211_ADDR_LEN]; */
   69         /* see below */
   70 } __attribute__((__packed__));
   71 
   72 struct ieee80211_frame_addr4 {
   73         u_int8_t        i_fc[2];
   74         u_int8_t        i_dur[2];
   75         u_int8_t        i_addr1[IEEE80211_ADDR_LEN];
   76         u_int8_t        i_addr2[IEEE80211_ADDR_LEN];
   77         u_int8_t        i_addr3[IEEE80211_ADDR_LEN];
   78         u_int8_t        i_seq[2];
   79         u_int8_t        i_addr4[IEEE80211_ADDR_LEN];
   80 } __attribute__((__packed__));
   81 
   82 #define IEEE80211_FC0_VERSION_MASK              0x03
   83 #define IEEE80211_FC0_VERSION_SHIFT             0
   84 #define IEEE80211_FC0_VERSION_0                 0x00
   85 #define IEEE80211_FC0_TYPE_MASK                 0x0c
   86 #define IEEE80211_FC0_TYPE_SHIFT                2
   87 #define IEEE80211_FC0_TYPE_MGT                  0x00
   88 #define IEEE80211_FC0_TYPE_CTL                  0x04
   89 #define IEEE80211_FC0_TYPE_DATA                 0x08
   90 
   91 #define IEEE80211_FC0_SUBTYPE_MASK              0xf0
   92 #define IEEE80211_FC0_SUBTYPE_SHIFT             4
   93 /* for TYPE_MGT */
   94 #define IEEE80211_FC0_SUBTYPE_ASSOC_REQ         0x00
   95 #define IEEE80211_FC0_SUBTYPE_ASSOC_RESP        0x10
   96 #define IEEE80211_FC0_SUBTYPE_REASSOC_REQ       0x20
   97 #define IEEE80211_FC0_SUBTYPE_REASSOC_RESP      0x30
   98 #define IEEE80211_FC0_SUBTYPE_PROBE_REQ         0x40
   99 #define IEEE80211_FC0_SUBTYPE_PROBE_RESP        0x50
  100 #define IEEE80211_FC0_SUBTYPE_BEACON            0x80
  101 #define IEEE80211_FC0_SUBTYPE_ATIM              0x90
  102 #define IEEE80211_FC0_SUBTYPE_DISASSOC          0xa0
  103 #define IEEE80211_FC0_SUBTYPE_AUTH              0xb0
  104 #define IEEE80211_FC0_SUBTYPE_DEAUTH            0xc0
  105 /* for TYPE_CTL */
  106 #define IEEE80211_FC0_SUBTYPE_PS_POLL           0xa0
  107 #define IEEE80211_FC0_SUBTYPE_RTS               0xb0
  108 #define IEEE80211_FC0_SUBTYPE_CTS               0xc0
  109 #define IEEE80211_FC0_SUBTYPE_ACK               0xd0
  110 #define IEEE80211_FC0_SUBTYPE_CF_END            0xe0
  111 #define IEEE80211_FC0_SUBTYPE_CF_END_ACK        0xf0
  112 /* for TYPE_DATA (bit combination) */
  113 #define IEEE80211_FC0_SUBTYPE_DATA              0x00
  114 #define IEEE80211_FC0_SUBTYPE_CF_ACK            0x10
  115 #define IEEE80211_FC0_SUBTYPE_CF_POLL           0x20
  116 #define IEEE80211_FC0_SUBTYPE_CF_ACPL           0x30
  117 #define IEEE80211_FC0_SUBTYPE_NODATA            0x40
  118 #define IEEE80211_FC0_SUBTYPE_CFACK             0x50
  119 #define IEEE80211_FC0_SUBTYPE_CFPOLL            0x60
  120 #define IEEE80211_FC0_SUBTYPE_CF_ACK_CF_ACK     0x70
  121 
  122 #define IEEE80211_FC1_DIR_MASK                  0x03
  123 #define IEEE80211_FC1_DIR_NODS                  0x00    /* STA->STA */
  124 #define IEEE80211_FC1_DIR_TODS                  0x01    /* STA->AP  */
  125 #define IEEE80211_FC1_DIR_FROMDS                0x02    /* AP ->STA */
  126 #define IEEE80211_FC1_DIR_DSTODS                0x03    /* AP ->AP  */
  127 
  128 #define IEEE80211_FC1_MORE_FRAG                 0x04
  129 #define IEEE80211_FC1_RETRY                     0x08
  130 #define IEEE80211_FC1_PWR_MGT                   0x10
  131 #define IEEE80211_FC1_MORE_DATA                 0x20
  132 #define IEEE80211_FC1_WEP                       0x40
  133 #define IEEE80211_FC1_ORDER                     0x80
  134 
  135 #define IEEE80211_SEQ_FRAG_MASK                 0x000f
  136 #define IEEE80211_SEQ_FRAG_SHIFT                0
  137 #define IEEE80211_SEQ_SEQ_MASK                  0xfff0
  138 #define IEEE80211_SEQ_SEQ_SHIFT                 4
  139 
  140 #define IEEE80211_NWID_LEN                      32
  141 
  142 /*
  143  * Control frames.
  144  */
  145 struct ieee80211_frame_min {
  146         u_int8_t        i_fc[2];
  147         u_int8_t        i_dur[2];
  148         u_int8_t        i_addr1[IEEE80211_ADDR_LEN];
  149         u_int8_t        i_addr2[IEEE80211_ADDR_LEN];
  150         /* FCS */
  151 } __attribute__((__packed__));
  152 
  153 struct ieee80211_frame_rts {
  154         u_int8_t        i_fc[2];
  155         u_int8_t        i_dur[2];
  156         u_int8_t        i_ra[IEEE80211_ADDR_LEN];
  157         u_int8_t        i_ta[IEEE80211_ADDR_LEN];
  158         /* FCS */
  159 } __attribute__((__packed__));
  160 
  161 struct ieee80211_frame_cts {
  162         u_int8_t        i_fc[2];
  163         u_int8_t        i_dur[2];
  164         u_int8_t        i_ra[IEEE80211_ADDR_LEN];
  165         /* FCS */
  166 } __attribute__((__packed__));
  167 
  168 struct ieee80211_frame_ack {
  169         u_int8_t        i_fc[2];
  170         u_int8_t        i_dur[2];
  171         u_int8_t        i_ra[IEEE80211_ADDR_LEN];
  172         /* FCS */
  173 } __attribute__((__packed__));
  174 
  175 struct ieee80211_frame_pspoll {
  176         u_int8_t        i_fc[2];
  177         u_int8_t        i_aid[2];
  178         u_int8_t        i_bssid[IEEE80211_ADDR_LEN];
  179         u_int8_t        i_ta[IEEE80211_ADDR_LEN];
  180         /* FCS */
  181 } __attribute__((__packed__));
  182 
  183 struct ieee80211_frame_cfend {          /* NB: also CF-End+CF-Ack */
  184         u_int8_t        i_fc[2];
  185         u_int8_t        i_dur[2];       /* should be zero */
  186         u_int8_t        i_ra[IEEE80211_ADDR_LEN];
  187         u_int8_t        i_bssid[IEEE80211_ADDR_LEN];
  188         /* FCS */
  189 } __attribute__((__packed__));
  190 
  191 /*
  192  * BEACON management packets
  193  *
  194  *      octet timestamp[8]
  195  *      octet beacon interval[2]
  196  *      octet capability information[2]
  197  *      information element
  198  *              octet elemid
  199  *              octet length
  200  *              octet information[length]
  201  */
  202 
  203 typedef uint8_t *ieee80211_mgt_beacon_t;
  204 
  205 #define IEEE80211_BEACON_INTERVAL(beacon) \
  206         ((beacon)[8] | ((beacon)[9] << 8))
  207 #define IEEE80211_BEACON_CAPABILITY(beacon) \
  208         ((beacon)[10] | ((beacon)[11] << 8))
  209 
  210 #define IEEE80211_CAPINFO_ESS                   0x0001
  211 #define IEEE80211_CAPINFO_IBSS                  0x0002
  212 #define IEEE80211_CAPINFO_CF_POLLABLE           0x0004
  213 #define IEEE80211_CAPINFO_CF_POLLREQ            0x0008
  214 #define IEEE80211_CAPINFO_PRIVACY               0x0010
  215 #define IEEE80211_CAPINFO_SHORT_PREAMBLE        0x0020
  216 #define IEEE80211_CAPINFO_PBCC                  0x0040
  217 #define IEEE80211_CAPINFO_CHNL_AGILITY          0x0080
  218 /* bits 8-9 are reserved */
  219 #define IEEE80211_CAPINFO_SHORT_SLOTTIME        0x0400
  220 /* bits 11-12 are reserved */
  221 #define IEEE80211_CAPINFO_DSSSOFDM              0x2000
  222 /* bits 14-15 are reserved */
  223 
  224 /*
  225  * Management information elements
  226  */
  227 struct ieee80211_information {
  228         char    ssid[IEEE80211_NWID_LEN+1];
  229         struct rates {
  230                 u_int8_t        *p;
  231         } rates;
  232         struct fh {
  233                 u_int16_t       dwell;
  234                 u_int8_t        set;
  235                 u_int8_t        pattern;
  236                 u_int8_t        index;
  237         } fh;
  238         struct ds {
  239                 u_int8_t        channel;
  240         } ds;
  241         struct cf {
  242                 u_int8_t        count;
  243                 u_int8_t        period;
  244                 u_int8_t        maxdur[2];
  245                 u_int8_t        dur[2];
  246         } cf;
  247         struct tim {
  248                 u_int8_t        count;
  249                 u_int8_t        period;
  250                 u_int8_t        bitctl;
  251                 /* u_int8_t     pvt[251]; The driver needs to use this. */
  252         } tim;
  253         struct ibss {
  254                 u_int16_t       atim;
  255         } ibss;
  256         struct challenge {
  257                 u_int8_t        *p;
  258                 u_int8_t        len;
  259         } challenge;
  260         struct erp {
  261                 u_int8_t        flags;
  262         } erp;
  263 };
  264 
  265 enum {
  266         IEEE80211_ELEMID_SSID                   = 0,
  267         IEEE80211_ELEMID_RATES                  = 1,
  268         IEEE80211_ELEMID_FHPARMS                = 2,
  269         IEEE80211_ELEMID_DSPARMS                = 3,
  270         IEEE80211_ELEMID_CFPARMS                = 4,
  271         IEEE80211_ELEMID_TIM                    = 5,
  272         IEEE80211_ELEMID_IBSSPARMS              = 6,
  273         IEEE80211_ELEMID_COUNTRY                = 7,
  274         IEEE80211_ELEMID_CHALLENGE              = 16,
  275         IEEE80211_ELEMID_ERP                    = 42,
  276         IEEE80211_ELEMID_XRATES                 = 50,
  277 };
  278 
  279 #define IEEE80211_CHALLENGE_LEN                 128
  280 
  281 #define IEEE80211_RATE_BASIC                    0x80
  282 #define IEEE80211_RATE_VAL                      0x7f
  283 
  284 /* EPR information element flags */
  285 #define IEEE80211_ERP_NON_ERP_PRESENT           0x01
  286 #define IEEE80211_ERP_USE_PROTECTION            0x02
  287 #define IEEE80211_ERP_BARKER_MODE               0x04
  288 
  289 /*
  290  * AUTH management packets
  291  *
  292  *      octet algo[2]
  293  *      octet seq[2]
  294  *      octet status[2]
  295  *      octet chal.id
  296  *      octet chal.length
  297  *      octet chal.text[253]
  298  */
  299 
  300 typedef u_int8_t *ieee80211_mgt_auth_t;
  301 
  302 #define IEEE80211_AUTH_ALGORITHM(auth) \
  303         ((auth)[0] | ((auth)[1] << 8))
  304 #define IEEE80211_AUTH_TRANSACTION(auth) \
  305         ((auth)[2] | ((auth)[3] << 8))
  306 #define IEEE80211_AUTH_STATUS(auth) \
  307         ((auth)[4] | ((auth)[5] << 8))
  308 
  309 #define IEEE80211_AUTH_ALG_OPEN                 0x0000
  310 #define IEEE80211_AUTH_ALG_SHARED               0x0001
  311 
  312 enum {
  313         IEEE80211_AUTH_OPEN_REQUEST             = 1,
  314         IEEE80211_AUTH_OPEN_RESPONSE            = 2,
  315 };
  316 
  317 enum {
  318         IEEE80211_AUTH_SHARED_REQUEST           = 1,
  319         IEEE80211_AUTH_SHARED_CHALLENGE         = 2,
  320         IEEE80211_AUTH_SHARED_RESPONSE          = 3,
  321         IEEE80211_AUTH_SHARED_PASS              = 4,
  322 };
  323 
  324 /*
  325  * Reason codes
  326  *
  327  * Unlisted codes are reserved
  328  */
  329 
  330 enum {
  331         IEEE80211_REASON_UNSPECIFIED            = 1,
  332         IEEE80211_REASON_AUTH_EXPIRE            = 2,
  333         IEEE80211_REASON_AUTH_LEAVE             = 3,
  334         IEEE80211_REASON_ASSOC_EXPIRE           = 4,
  335         IEEE80211_REASON_ASSOC_TOOMANY          = 5,
  336         IEEE80211_REASON_NOT_AUTHED             = 6,
  337         IEEE80211_REASON_NOT_ASSOCED            = 7,
  338         IEEE80211_REASON_ASSOC_LEAVE            = 8,
  339         IEEE80211_REASON_ASSOC_NOT_AUTHED       = 9,
  340 
  341         IEEE80211_STATUS_SUCCESS                = 0,
  342         IEEE80211_STATUS_UNSPECIFIED            = 1,
  343         IEEE80211_STATUS_CAPINFO                = 10,
  344         IEEE80211_STATUS_NOT_ASSOCED            = 11,
  345         IEEE80211_STATUS_OTHER                  = 12,
  346         IEEE80211_STATUS_ALG                    = 13,
  347         IEEE80211_STATUS_SEQUENCE               = 14,
  348         IEEE80211_STATUS_CHALLENGE              = 15,
  349         IEEE80211_STATUS_TIMEOUT                = 16,
  350         IEEE80211_STATUS_TOOMANY                = 17,
  351         IEEE80211_STATUS_BASIC_RATE             = 18,
  352         IEEE80211_STATUS_SP_REQUIRED            = 19,
  353         IEEE80211_STATUS_PBCC_REQUIRED          = 20,
  354         IEEE80211_STATUS_CA_REQUIRED            = 21,
  355         IEEE80211_STATUS_TOO_MANY_STATIONS      = 22,
  356         IEEE80211_STATUS_RATES                  = 23,
  357         IEEE80211_STATUS_SHORTSLOT_REQUIRED     = 25,
  358         IEEE80211_STATUS_DSSSOFDM_REQUIRED      = 26,
  359 };
  360 
  361 #define IEEE80211_WEP_KEYLEN                    5       /* 40bit */
  362 #define IEEE80211_WEP_IVLEN                     3       /* 24bit */
  363 #define IEEE80211_WEP_KIDLEN                    1       /* 1 octet */
  364 #define IEEE80211_WEP_CRCLEN                    4       /* CRC-32 */
  365 #define IEEE80211_WEP_NKID                      4       /* number of key ids */
  366 
  367 #define IEEE80211_CRC_LEN                       4
  368 
  369 #define IEEE80211_MTU                           1500
  370 #define IEEE80211_MAX_LEN                       (2300 + IEEE80211_CRC_LEN + \
  371     (IEEE80211_WEP_IVLEN + IEEE80211_WEP_KIDLEN + IEEE80211_WEP_CRCLEN))
  372 #define IEEE80211_MIN_LEN \
  373         (sizeof(struct ieee80211_frame_min) + IEEE80211_CRC_LEN)
  374 
  375 #define IEEE80211_MAX_AID                       2007
  376 
  377 #define IEEE80211_AID_SET(b, w) \
  378         ((w)[((b) & ~0xc000) / 32] |= (1 << (((b) & ~0xc000) % 32)))
  379 #define IEEE80211_AID_CLR(b, w) \
  380         ((w)[((b) & ~0xc000) / 32] &= ~(1 << (((b) & ~0xc000) % 32)))
  381 #define IEEE80211_AID_ISSET(b, w) \
  382         ((w)[((b) & ~0xc000) / 32] & (1 << (((b) & ~0xc000) % 32)))
  383 
  384 /* 
  385  * RTS frame length parameters.  The default is specified in
  386  * the 802.11 spec.  The max may be wrong for jumbo frames.
  387  */
  388 #define IEEE80211_RTS_DEFAULT                   512
  389 #define IEEE80211_RTS_MIN                       1
  390 #define IEEE80211_RTS_MAX                       IEEE80211_MAX_LEN
  391 
  392 enum {
  393         IEEE80211_AUTH_NONE     = 0,
  394         IEEE80211_AUTH_OPEN     = 1,
  395         IEEE80211_AUTH_SHARED   = 2,
  396 };
  397 
  398 #endif /* _NET80211_IEEE80211_H_ */
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FreeBSD/Linux Kernel Cross Reference sys/net80211/ieee80211.h

FreeBSD/Linux Kernel Cross Reference
sys/net80211/ieee80211.h
