The Tcpdump Group git mirrors - tcpdump/blob - ieee802_11.h

   1 /* @(#) $Header: /tcpdump/master/tcpdump/ieee802_11.h,v 1.7 2003-02-04 05:53:21 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 #define IEEE802_11_FC_LEN       2
  25
  26 #define T_MGMT 0x0  /* management */
  27 #define T_CTRL 0x1  /* control */
  28 #define T_DATA 0x2 /* data */
  29 #define T_RESV 0x3  /* reserved */
  30
  31 #define ST_ASSOC_REQUEST        0x0
  32 #define ST_ASSOC_RESPONSE       0x1
  33 #define ST_REASSOC_REQUEST      0x2
  34 #define ST_REASSOC_RESPONSE     0x3
  35 #define ST_PROBE_REQUEST        0x4
  36 #define ST_PROBE_RESPONSE       0x5
  37 /* RESERVED                     0x6  */
  38 /* RESERVED                     0x7  */
  39 #define ST_BEACON               0x8
  40 #define ST_ATIM                 0x9
  41 #define ST_DISASSOC             0xA
  42 #define ST_AUTH                 0xB
  43 #define ST_DEAUTH               0xC
  44 /* RESERVED                     0xD  */
  45 /* RESERVED                     0xE  */
  46 /* RESERVED                     0xF  */
  47
  48
  49 #define CTRL_PS_POLL    0xA
  50 #define CTRL_RTS        0xB
  51 #define CTRL_CTS        0xC
  52 #define CTRL_ACK        0xD
  53 #define CTRL_CF_END     0xE
  54 #define CTRL_END_ACK    0xF
  55
  56 #define DATA_DATA               0x0
  57 #define DATA_DATA_CF_ACK        0x1
  58 #define DATA_DATA_CF_POLL       0x2
  59 #define DATA_DATA_CF_ACK_POLL   0x3
  60 #define DATA_NODATA             0x4
  61 #define DATA_NODATA_CF_ACK      0x5
  62 #define DATA_NODATA_CF_POLL     0x6
  63 #define DATA_NODATA_CF_ACK_POLL 0x7
  64
  65 /*
  66  * Bits in the frame control field.
  67  */
  68 #define FC_VERSION(fc)          ((fc) & 0x3)
  69 #define FC_TYPE(fc)             (((fc) >> 2) & 0x3)
  70 #define FC_SUBTYPE(fc)          (((fc) >> 4) & 0xF)
  71 #define FC_TO_DS(fc)            ((fc) & 0x0100)
  72 #define FC_FROM_DS(fc)          ((fc) & 0x0200)
  73 #define FC_MORE_FLAG(fc)        ((fc) & 0x0400)
  74 #define FC_RETRY(fc)            ((fc) & 0x0800)
  75 #define FC_POWER_MGMT(fc)       ((fc) & 0x1000)
  76 #define FC_MORE_DATA(fc)        ((fc) & 0x2000)
  77 #define FC_WEP(fc)              ((fc) & 0x4000)
  78 #define FC_ORDER(fc)            ((fc) & 0x8000)
  79
  80 struct mgmt_header_t {
  81         u_int16_t       fc;
  82         u_int16_t       duration;
  83         u_int8_t        da[6];
  84         u_int8_t        sa[6];
  85         u_int8_t        bssid[6];
  86         u_int16_t       seq_ctrl;
  87 };
  88
  89 #define MGMT_HEADER_LEN (2+2+6+6+6+2)
  90
  91 #define CAPABILITY_ESS(cap)     ((cap) & 0x0001)
  92 #define CAPABILITY_IBSS(cap)    ((cap) & 0x0002)
  93 #define CAPABILITY_CFP(cap)     ((cap) & 0x0004)
  94 #define CAPABILITY_CFP_REQ(cap) ((cap) & 0x0008)
  95 #define CAPABILITY_PRIVACY(cap) ((cap) & 0x0010)
  96
  97 struct ssid_t {
  98         u_int8_t        element_id;
  99         u_int8_t        length;
 100         u_char          ssid[33];  /* 32 + 1 for null */
 101 };
 102
 103 struct rates_t {
 104         u_int8_t        element_id;
 105         u_int8_t        length;
 106         u_int8_t        rate[8];
 107 };
 108
 109 struct challenge_t {
 110         u_int8_t        element_id;
 111         u_int8_t        length;
 112         u_int8_t        text[254]; /* 1-253 + 1 for null */
 113 };
 114 struct fh_t {
 115         u_int8_t        element_id;
 116         u_int8_t        length;
 117         u_int16_t       dwell_time;
 118         u_int8_t        hop_set;
 119         u_int8_t        hop_pattern;
 120         u_int8_t        hop_index;
 121 };
 122
 123 struct ds_t {
 124         u_int8_t        element_id;
 125         u_int8_t        length;
 126         u_int8_t        channel;
 127 };
 128
 129 struct cf_t {
 130         u_int8_t        element_id;
 131         u_int8_t        length;
 132         u_int8_t        count;
 133         u_int8_t        period;
 134         u_int16_t       max_duration;
 135         u_int16_t       dur_remaing;
 136 };
 137
 138 struct tim_t {
 139         u_int8_t        element_id;
 140         u_int8_t        length;
 141         u_int8_t        count;
 142         u_int8_t        period;
 143         u_int8_t        bitmap_control;
 144         u_int8_t        bitmap[251];
 145 };
 146
 147 #define E_SSID          0
 148 #define E_RATES         1
 149 #define E_FH            2
 150 #define E_DS            3
 151 #define E_CF            4
 152 #define E_TIM           5
 153 #define E_IBSS          6
 154 /* reserved             7 */
 155 /* reserved             8 */
 156 /* reserved             9 */
 157 /* reserved             10 */
 158 /* reserved             11 */
 159 /* reserved             12 */
 160 /* reserved             13 */
 161 /* reserved             14 */
 162 /* reserved             15 */
 163 /* reserved             16 */
 164
 165 #define E_CHALLENGE     16
 166 /* reserved             17 */
 167 /* reserved             18 */
 168 /* reserved             19 */
 169 /* reserved             16 */
 170 /* reserved             16 */
 171
 172
 173 struct mgmt_body_t {
 174         u_int8_t        timestamp[8];
 175         u_int16_t       beacon_interval;
 176         u_int16_t       listen_interval;
 177         u_int16_t       status_code;
 178         u_int16_t       aid;
 179         u_char          ap[6];
 180         u_int16_t       reason_code;
 181         u_int16_t       auth_alg;
 182         u_int16_t       auth_trans_seq_num;
 183         struct challenge_t  challenge;
 184         u_int16_t       capability_info;
 185         struct ssid_t   ssid;
 186         struct rates_t  rates;
 187         struct ds_t     ds;
 188         struct cf_t     cf;
 189         struct fh_t     fh;
 190         struct tim_t    tim;
 191 };
 192
 193 struct ctrl_rts_t {
 194         u_int16_t       fc;
 195         u_int16_t       duration;
 196         u_int8_t        ra[6];
 197         u_int8_t        ta[6];
 198         u_int8_t        fcs[4];
 199 };
 200
 201 #define CTRL_RTS_LEN    (2+2+6+6+4)
 202
 203 struct ctrl_cts_t {
 204         u_int16_t       fc;
 205         u_int16_t       duration;
 206         u_int8_t        ra[6];
 207         u_int8_t        fcs[4];
 208 };
 209
 210 #define CTRL_CTS_LEN    (2+2+6+4)
 211
 212 struct ctrl_ack_t {
 213         u_int16_t       fc;
 214         u_int16_t       duration;
 215         u_int8_t        ra[6];
 216         u_int8_t        fcs[4];
 217 };
 218
 219 #define CTRL_ACK_LEN    (2+2+6+4)
 220
 221 struct ctrl_ps_poll_t {
 222         u_int16_t       fc;
 223         u_int16_t       aid;
 224         u_int8_t        bssid[6];
 225         u_int8_t        ta[6];
 226         u_int8_t        fcs[4];
 227 };
 228
 229 #define CTRL_PS_POLL_LEN        (2+2+6+6+4)
 230
 231 struct ctrl_end_t {
 232         u_int16_t       fc;
 233         u_int16_t       duration;
 234         u_int8_t        ra[6];
 235         u_int8_t        bssid[6];
 236         u_int8_t        fcs[4];
 237 };
 238
 239 #define CTRL_END_LEN    (2+2+6+6+4)
 240
 241 struct ctrl_end_ack_t {
 242         u_int16_t       fc;
 243         u_int16_t       duration;
 244         u_int8_t        ra[6];
 245         u_int8_t        bssid[6];
 246         u_int8_t        fcs[4];
 247 };
 248
 249 #define CTRL_END_ACK_LEN        (2+2+6+6+4)
 250
 251 #define IV_IV(iv)       ((iv) & 0xFFFFFF)
 252 #define IV_PAD(iv)      (((iv) >> 24) & 0x3F)
 253 #define IV_KEYID(iv)    (((iv) >> 30) & 0x03)