contrib/tcpdump/ieee802_11.h

   1 /* @(#) $Header: /tcpdump/master/tcpdump/ieee802_11.h,v 1.12 2007-07-22 19:59:06 guy Exp $ (LBL) */
   2 /*
   3  * Copyright (c) 2001
   4  *      Fortress Technologies
   5  *      Charlie Lenahan ( clenahan@fortresstech.com )
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that: (1) source code distributions
   9  * retain the above copyright notice and this paragraph in its entirety, (2)
  10  * distributions including binary code include the above copyright notice and
  11  * this paragraph in its entirety in the documentation or other materials
  12  * provided with the distribution, and (3) all advertising materials mentioning
  13  * features or use of this software display the following acknowledgement:
  14  * ``This product includes software developed by the University of California,
  15  * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
  16  * the University nor the names of its contributors may be used to endorse
  17  * or promote products derived from this software without specific prior
  18  * written permission.
  19  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
  20  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
  21  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  22  */
  23
  24 /* Lengths of 802.11 header components. */
  25 #define IEEE802_11_FC_LEN               2
  26 #define IEEE802_11_DUR_LEN              2
  27 #define IEEE802_11_DA_LEN               6
  28 #define IEEE802_11_SA_LEN               6
  29 #define IEEE802_11_BSSID_LEN            6
  30 #define IEEE802_11_RA_LEN               6
  31 #define IEEE802_11_TA_LEN               6
  32 #define IEEE802_11_SEQ_LEN              2
  33 #define IEEE802_11_CTL_LEN              2
  34 #define IEEE802_11_IV_LEN               3
  35 #define IEEE802_11_KID_LEN              1
  36
  37 /* Frame check sequence length. */
  38 #define IEEE802_11_FCS_LEN              4
  39
  40 /* Lengths of beacon components. */
  41 #define IEEE802_11_TSTAMP_LEN           8
  42 #define IEEE802_11_BCNINT_LEN           2
  43 #define IEEE802_11_CAPINFO_LEN          2
  44 #define IEEE802_11_LISTENINT_LEN        2
  45
  46 #define IEEE802_11_AID_LEN              2
  47 #define IEEE802_11_STATUS_LEN           2
  48 #define IEEE802_11_REASON_LEN           2
  49
  50 /* Length of previous AP in reassocation frame */
  51 #define IEEE802_11_AP_LEN               6
  52
  53 #define T_MGMT 0x0  /* management */
  54 #define T_CTRL 0x1  /* control */
  55 #define T_DATA 0x2 /* data */
  56 #define T_RESV 0x3  /* reserved */
  57
  58 #define ST_ASSOC_REQUEST        0x0
  59 #define ST_ASSOC_RESPONSE       0x1
  60 #define ST_REASSOC_REQUEST      0x2
  61 #define ST_REASSOC_RESPONSE     0x3
  62 #define ST_PROBE_REQUEST        0x4
  63 #define ST_PROBE_RESPONSE       0x5
  64 /* RESERVED                     0x6  */
  65 /* RESERVED                     0x7  */
  66 #define ST_BEACON               0x8
  67 #define ST_ATIM                 0x9
  68 #define ST_DISASSOC             0xA
  69 #define ST_AUTH                 0xB
  70 #define ST_DEAUTH               0xC
  71 #define ST_ACTION               0xD
  72 /* RESERVED                     0xE  */
  73 /* RESERVED                     0xF  */
  74
  75
  76 #define CTRL_CONTROL_WRAPPER    0x7
  77 #define CTRL_BAR        0x8
  78 #define CTRL_BA         0x9
  79 #define CTRL_PS_POLL    0xA
  80 #define CTRL_RTS        0xB
  81 #define CTRL_CTS        0xC
  82 #define CTRL_ACK        0xD
  83 #define CTRL_CF_END     0xE
  84 #define CTRL_END_ACK    0xF
  85
  86 #define DATA_DATA                       0x0
  87 #define DATA_DATA_CF_ACK                0x1
  88 #define DATA_DATA_CF_POLL               0x2
  89 #define DATA_DATA_CF_ACK_POLL           0x3
  90 #define DATA_NODATA                     0x4
  91 #define DATA_NODATA_CF_ACK              0x5
  92 #define DATA_NODATA_CF_POLL             0x6
  93 #define DATA_NODATA_CF_ACK_POLL         0x7
  94
  95 #define DATA_QOS_DATA                   0x8
  96 #define DATA_QOS_DATA_CF_ACK            0x9
  97 #define DATA_QOS_DATA_CF_POLL           0xA
  98 #define DATA_QOS_DATA_CF_ACK_POLL       0xB
  99 #define DATA_QOS_NODATA                 0xC
 100 #define DATA_QOS_CF_POLL_NODATA         0xE
 101 #define DATA_QOS_CF_ACK_POLL_NODATA     0xF
 102
 103 /*
 104  * The subtype field of a data frame is, in effect, composed of 4 flag
 105  * bits - CF-Ack, CF-Poll, Null (means the frame doesn't actually have
 106  * any data), and QoS.
 107  */
 108 #define DATA_FRAME_IS_CF_ACK(x)         ((x) & 0x01)
 109 #define DATA_FRAME_IS_CF_POLL(x)        ((x) & 0x02)
 110 #define DATA_FRAME_IS_NULL(x)           ((x) & 0x04)
 111 #define DATA_FRAME_IS_QOS(x)            ((x) & 0x08)
 112
 113 /*
 114  * Bits in the frame control field.
 115  */
 116 #define FC_VERSION(fc)          ((fc) & 0x3)
 117 #define FC_TYPE(fc)             (((fc) >> 2) & 0x3)
 118 #define FC_SUBTYPE(fc)          (((fc) >> 4) & 0xF)
 119 #define FC_TO_DS(fc)            ((fc) & 0x0100)
 120 #define FC_FROM_DS(fc)          ((fc) & 0x0200)
 121 #define FC_MORE_FLAG(fc)        ((fc) & 0x0400)
 122 #define FC_RETRY(fc)            ((fc) & 0x0800)
 123 #define FC_POWER_MGMT(fc)       ((fc) & 0x1000)
 124 #define FC_MORE_DATA(fc)        ((fc) & 0x2000)
 125 #define FC_WEP(fc)              ((fc) & 0x4000)
 126 #define FC_ORDER(fc)            ((fc) & 0x8000)
 127
 128 struct mgmt_header_t {
 129         u_int16_t       fc;
 130         u_int16_t       duration;
 131         u_int8_t        da[6];
 132         u_int8_t        sa[6];
 133         u_int8_t        bssid[6];
 134         u_int16_t       seq_ctrl;
 135 };
 136
 137 #define MGMT_HDRLEN     (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+\
 138                          IEEE802_11_DA_LEN+IEEE802_11_SA_LEN+\
 139                          IEEE802_11_BSSID_LEN+IEEE802_11_SEQ_LEN)
 140
 141 #define CAPABILITY_ESS(cap)     ((cap) & 0x0001)
 142 #define CAPABILITY_IBSS(cap)    ((cap) & 0x0002)
 143 #define CAPABILITY_CFP(cap)     ((cap) & 0x0004)
 144 #define CAPABILITY_CFP_REQ(cap) ((cap) & 0x0008)
 145 #define CAPABILITY_PRIVACY(cap) ((cap) & 0x0010)
 146
 147 struct ssid_t {
 148         u_int8_t        element_id;
 149         u_int8_t        length;
 150         u_char          ssid[33];  /* 32 + 1 for null */
 151 };
 152
 153 struct rates_t {
 154         u_int8_t        element_id;
 155         u_int8_t        length;
 156         u_int8_t        rate[16];
 157 };
 158
 159 struct challenge_t {
 160         u_int8_t        element_id;
 161         u_int8_t        length;
 162         u_int8_t        text[254]; /* 1-253 + 1 for null */
 163 };
 164
 165 struct fh_t {
 166         u_int8_t        element_id;
 167         u_int8_t        length;
 168         u_int16_t       dwell_time;
 169         u_int8_t        hop_set;
 170         u_int8_t        hop_pattern;
 171         u_int8_t        hop_index;
 172 };
 173
 174 struct ds_t {
 175         u_int8_t        element_id;
 176         u_int8_t        length;
 177         u_int8_t        channel;
 178 };
 179
 180 struct cf_t {
 181         u_int8_t        element_id;
 182         u_int8_t        length;
 183         u_int8_t        count;
 184         u_int8_t        period;
 185         u_int16_t       max_duration;
 186         u_int16_t       dur_remaing;
 187 };
 188
 189 struct tim_t {
 190         u_int8_t        element_id;
 191         u_int8_t        length;
 192         u_int8_t        count;
 193         u_int8_t        period;
 194         u_int8_t        bitmap_control;
 195         u_int8_t        bitmap[251];
 196 };
 197
 198 #define E_SSID          0
 199 #define E_RATES         1
 200 #define E_FH            2
 201 #define E_DS            3
 202 #define E_CF            4
 203 #define E_TIM           5
 204 #define E_IBSS          6
 205 /* reserved             7 */
 206 /* reserved             8 */
 207 /* reserved             9 */
 208 /* reserved             10 */
 209 /* reserved             11 */
 210 /* reserved             12 */
 211 /* reserved             13 */
 212 /* reserved             14 */
 213 /* reserved             15 */
 214 /* reserved             16 */
 215
 216 #define E_CHALLENGE     16
 217 /* reserved             17 */
 218 /* reserved             18 */
 219 /* reserved             19 */
 220 /* reserved             16 */
 221 /* reserved             16 */
 222
 223
 224 struct mgmt_body_t {
 225         u_int8_t        timestamp[IEEE802_11_TSTAMP_LEN];
 226         u_int16_t       beacon_interval;
 227         u_int16_t       listen_interval;
 228         u_int16_t       status_code;
 229         u_int16_t       aid;
 230         u_char          ap[IEEE802_11_AP_LEN];
 231         u_int16_t       reason_code;
 232         u_int16_t       auth_alg;
 233         u_int16_t       auth_trans_seq_num;
 234         int             challenge_present;
 235         struct challenge_t  challenge;
 236         u_int16_t       capability_info;
 237         int             ssid_present;
 238         struct ssid_t   ssid;
 239         int             rates_present;
 240         struct rates_t  rates;
 241         int             ds_present;
 242         struct ds_t     ds;
 243         int             cf_present;
 244         struct cf_t     cf;
 245         int             fh_present;
 246         struct fh_t     fh;
 247         int             tim_present;
 248         struct tim_t    tim;
 249 };
 250
 251 struct ctrl_rts_t {
 252         u_int16_t       fc;
 253         u_int16_t       duration;
 254         u_int8_t        ra[6];
 255         u_int8_t        ta[6];
 256         u_int8_t        fcs[4];
 257 };
 258
 259 #define CTRL_RTS_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+\
 260                          IEEE802_11_RA_LEN+IEEE802_11_TA_LEN)
 261
 262 struct ctrl_cts_t {
 263         u_int16_t       fc;
 264         u_int16_t       duration;
 265         u_int8_t        ra[6];
 266         u_int8_t        fcs[4];
 267 };
 268
 269 #define CTRL_CTS_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+IEEE802_11_RA_LEN)
 270
 271 struct ctrl_ack_t {
 272         u_int16_t       fc;
 273         u_int16_t       duration;
 274         u_int8_t        ra[6];
 275         u_int8_t        fcs[4];
 276 };
 277
 278 #define CTRL_ACK_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+IEEE802_11_RA_LEN)
 279
 280 struct ctrl_ps_poll_t {
 281         u_int16_t       fc;
 282         u_int16_t       aid;
 283         u_int8_t        bssid[6];
 284         u_int8_t        ta[6];
 285         u_int8_t        fcs[4];
 286 };
 287
 288 #define CTRL_PS_POLL_HDRLEN     (IEEE802_11_FC_LEN+IEEE802_11_AID_LEN+\
 289                                  IEEE802_11_BSSID_LEN+IEEE802_11_TA_LEN)
 290
 291 struct ctrl_end_t {
 292         u_int16_t       fc;
 293         u_int16_t       duration;
 294         u_int8_t        ra[6];
 295         u_int8_t        bssid[6];
 296         u_int8_t        fcs[4];
 297 };
 298
 299 #define CTRL_END_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+\
 300                          IEEE802_11_RA_LEN+IEEE802_11_BSSID_LEN)
 301
 302 struct ctrl_end_ack_t {
 303         u_int16_t       fc;
 304         u_int16_t       duration;
 305         u_int8_t        ra[6];
 306         u_int8_t        bssid[6];
 307         u_int8_t        fcs[4];
 308 };
 309
 310 #define CTRL_END_ACK_HDRLEN     (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+\
 311                                  IEEE802_11_RA_LEN+IEEE802_11_BSSID_LEN)
 312
 313 struct ctrl_ba_t {
 314         u_int16_t       fc;
 315         u_int16_t       duration;
 316         u_int8_t        ra[6];
 317         u_int8_t        fcs[4];
 318 };
 319
 320 #define CTRL_BA_HDRLEN  (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+IEEE802_11_RA_LEN)
 321
 322 struct ctrl_bar_t {
 323         u_int16_t       fc;
 324         u_int16_t       dur;
 325         u_int8_t        ra[6];
 326         u_int8_t        ta[6];
 327         u_int16_t       ctl;
 328         u_int16_t       seq;
 329         u_int8_t        fcs[4];
 330 };
 331
 332 #define CTRL_BAR_HDRLEN         (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+\
 333                                  IEEE802_11_RA_LEN+IEEE802_11_TA_LEN+\
 334                                  IEEE802_11_CTL_LEN+IEEE802_11_SEQ_LEN)
 335
 336 struct meshcntl_t {
 337         u_int8_t        flags;
 338         u_int8_t        ttl;
 339         u_int8_t        seq[4];
 340         u_int8_t        addr4[6];
 341         u_int8_t        addr5[6];
 342         u_int8_t        addr6[6];
 343 };
 344
 345 #define IV_IV(iv)       ((iv) & 0xFFFFFF)
 346 #define IV_PAD(iv)      (((iv) >> 24) & 0x3F)
 347 #define IV_KEYID(iv)    (((iv) >> 30) & 0x03)