2 /* @(#) $Header: /tcpdump/master/tcpdump/ieee802_11.h,v 1.9 2003/07/22 17:36:57 guy Exp $ (LBL) */
5 * Fortress Technologies
6 * Charlie Lenahan ( clenahan@fortresstech.com )
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that: (1) source code distributions
10 * retain the above copyright notice and this paragraph in its entirety, (2)
11 * distributions including binary code include the above copyright notice and
12 * this paragraph in its entirety in the documentation or other materials
13 * provided with the distribution, and (3) all advertising materials mentioning
14 * features or use of this software display the following acknowledgement:
15 * ``This product includes software developed by the University of California,
16 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
17 * the University nor the names of its contributors may be used to endorse
18 * or promote products derived from this software without specific prior
20 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
21 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
22 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
25 /* Lengths of 802.11 header components. */
26 #define IEEE802_11_FC_LEN 2
27 #define IEEE802_11_DUR_LEN 2
28 #define IEEE802_11_DA_LEN 6
29 #define IEEE802_11_SA_LEN 6
30 #define IEEE802_11_BSSID_LEN 6
31 #define IEEE802_11_RA_LEN 6
32 #define IEEE802_11_TA_LEN 6
33 #define IEEE802_11_SEQ_LEN 2
34 #define IEEE802_11_CTL_LEN 2
35 #define IEEE802_11_IV_LEN 3
36 #define IEEE802_11_KID_LEN 1
38 /* Frame check sequence length. */
39 #define IEEE802_11_FCS_LEN 4
41 /* Lengths of beacon components. */
42 #define IEEE802_11_TSTAMP_LEN 8
43 #define IEEE802_11_BCNINT_LEN 2
44 #define IEEE802_11_CAPINFO_LEN 2
45 #define IEEE802_11_LISTENINT_LEN 2
47 #define IEEE802_11_AID_LEN 2
48 #define IEEE802_11_STATUS_LEN 2
49 #define IEEE802_11_REASON_LEN 2
51 /* Length of previous AP in reassocation frame */
52 #define IEEE802_11_AP_LEN 6
54 #define T_MGMT 0x0 /* management */
55 #define T_CTRL 0x1 /* control */
56 #define T_DATA 0x2 /* data */
57 #define T_RESV 0x3 /* reserved */
59 #define ST_ASSOC_REQUEST 0x0
60 #define ST_ASSOC_RESPONSE 0x1
61 #define ST_REASSOC_REQUEST 0x2
62 #define ST_REASSOC_RESPONSE 0x3
63 #define ST_PROBE_REQUEST 0x4
64 #define ST_PROBE_RESPONSE 0x5
69 #define ST_DISASSOC 0xA
78 #define CTRL_PS_POLL 0xA
82 #define CTRL_CF_END 0xE
83 #define CTRL_END_ACK 0xF
86 #define DATA_DATA_CF_ACK 0x1
87 #define DATA_DATA_CF_POLL 0x2
88 #define DATA_DATA_CF_ACK_POLL 0x3
89 #define DATA_NODATA 0x4
90 #define DATA_NODATA_CF_ACK 0x5
91 #define DATA_NODATA_CF_POLL 0x6
92 #define DATA_NODATA_CF_ACK_POLL 0x7
95 * Bits in the frame control field.
97 #define FC_VERSION(fc) ((fc) & 0x3)
98 #define FC_TYPE(fc) (((fc) >> 2) & 0x3)
99 #define FC_SUBTYPE(fc) (((fc) >> 4) & 0xF)
100 #define FC_TO_DS(fc) ((fc) & 0x0100)
101 #define FC_FROM_DS(fc) ((fc) & 0x0200)
102 #define FC_MORE_FLAG(fc) ((fc) & 0x0400)
103 #define FC_RETRY(fc) ((fc) & 0x0800)
104 #define FC_POWER_MGMT(fc) ((fc) & 0x1000)
105 #define FC_MORE_DATA(fc) ((fc) & 0x2000)
106 #define FC_WEP(fc) ((fc) & 0x4000)
107 #define FC_ORDER(fc) ((fc) & 0x8000)
109 struct mgmt_header_t {
118 #define MGMT_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+\
119 IEEE802_11_DA_LEN+IEEE802_11_SA_LEN+\
120 IEEE802_11_BSSID_LEN+IEEE802_11_SEQ_LEN)
122 #define CAPABILITY_ESS(cap) ((cap) & 0x0001)
123 #define CAPABILITY_IBSS(cap) ((cap) & 0x0002)
124 #define CAPABILITY_CFP(cap) ((cap) & 0x0004)
125 #define CAPABILITY_CFP_REQ(cap) ((cap) & 0x0008)
126 #define CAPABILITY_PRIVACY(cap) ((cap) & 0x0010)
131 u_char ssid[33]; /* 32 + 1 for null */
143 u_int8_t text[254]; /* 1-253 + 1 for null */
148 u_int16_t dwell_time;
150 u_int8_t hop_pattern;
165 u_int16_t max_duration;
166 u_int16_t dur_remaing;
174 u_int8_t bitmap_control;
175 u_int8_t bitmap[251];
196 #define E_CHALLENGE 16
205 u_int8_t timestamp[8];
206 u_int16_t beacon_interval;
207 u_int16_t listen_interval;
208 u_int16_t status_code;
211 u_int16_t reason_code;
213 u_int16_t auth_trans_seq_num;
214 struct challenge_t challenge;
215 u_int16_t capability_info;
217 struct rates_t rates;
232 #define CTRL_RTS_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+\
233 IEEE802_11_RA_LEN+IEEE802_11_TA_LEN)
242 #define CTRL_CTS_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+IEEE802_11_RA_LEN)
251 #define CTRL_ACK_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+IEEE802_11_RA_LEN)
253 struct ctrl_ps_poll_t {
261 #define CTRL_PS_POLL_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_AID_LEN+\
262 IEEE802_11_BSSID_LEN+IEEE802_11_TA_LEN)
272 #define CTRL_END_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+\
273 IEEE802_11_RA_LEN+IEEE802_11_BSSID_LEN)
275 struct ctrl_end_ack_t {
283 #define CTRL_END_ACK_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+\
284 IEEE802_11_RA_LEN+IEEE802_11_BSSID_LEN)
296 #define CTRL_BAR_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+\
297 IEEE802_11_RA_LEN+IEEE802_11_TA_LEN+\
298 IEEE802_11_CTL_LEN+IEEE802_11_SEQ_LEN)
300 #define IV_IV(iv) ((iv) & 0xFFFFFF)
301 #define IV_PAD(iv) (((iv) >> 24) & 0x3F)
302 #define IV_KEYID(iv) (((iv) >> 30) & 0x03)