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Diffstat (limited to 'ieee802_11.h')
| -rw-r--r-- | ieee802_11.h | 317 |
1 files changed, 317 insertions, 0 deletions
diff --git a/ieee802_11.h b/ieee802_11.h new file mode 100644 index 0000000..f578a43 --- /dev/null +++ b/ieee802_11.h @@ -0,0 +1,317 @@ +/* @(#) $Header: /tcpdump/master/tcpdump/ieee802_11.h,v 1.9.4.3 2007/07/22 20:01:16 guy Exp $ (LBL) */ +/* + * Copyright (c) 2001 + * Fortress Technologies + * Charlie Lenahan ( clenahan@fortresstech.com ) + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that: (1) source code distributions + * retain the above copyright notice and this paragraph in its entirety, (2) + * distributions including binary code include the above copyright notice and + * this paragraph in its entirety in the documentation or other materials + * provided with the distribution, and (3) all advertising materials mentioning + * features or use of this software display the following acknowledgement: + * ``This product includes software developed by the University of California, + * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of + * the University nor the names of its contributors may be used to endorse + * or promote products derived from this software without specific prior + * written permission. + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. + */ + +/* Lengths of 802.11 header components. */ +#define IEEE802_11_FC_LEN 2 +#define IEEE802_11_DUR_LEN 2 +#define IEEE802_11_DA_LEN 6 +#define IEEE802_11_SA_LEN 6 +#define IEEE802_11_BSSID_LEN 6 +#define IEEE802_11_RA_LEN 6 +#define IEEE802_11_TA_LEN 6 +#define IEEE802_11_SEQ_LEN 2 +#define IEEE802_11_IV_LEN 3 +#define IEEE802_11_KID_LEN 1 + +/* Frame check sequence length. */ +#define IEEE802_11_FCS_LEN 4 + +/* Lengths of beacon components. */ +#define IEEE802_11_TSTAMP_LEN 8 +#define IEEE802_11_BCNINT_LEN 2 +#define IEEE802_11_CAPINFO_LEN 2 +#define IEEE802_11_LISTENINT_LEN 2 + +#define IEEE802_11_AID_LEN 2 +#define IEEE802_11_STATUS_LEN 2 +#define IEEE802_11_REASON_LEN 2 + +/* Length of previous AP in reassocation frame */ +#define IEEE802_11_AP_LEN 6 + +#define T_MGMT 0x0 /* management */ +#define T_CTRL 0x1 /* control */ +#define T_DATA 0x2 /* data */ +#define T_RESV 0x3 /* reserved */ + +#define ST_ASSOC_REQUEST 0x0 +#define ST_ASSOC_RESPONSE 0x1 +#define ST_REASSOC_REQUEST 0x2 +#define ST_REASSOC_RESPONSE 0x3 +#define ST_PROBE_REQUEST 0x4 +#define ST_PROBE_RESPONSE 0x5 +/* RESERVED 0x6 */ +/* RESERVED 0x7 */ +#define ST_BEACON 0x8 +#define ST_ATIM 0x9 +#define ST_DISASSOC 0xA +#define ST_AUTH 0xB +#define ST_DEAUTH 0xC +/* RESERVED 0xD */ +/* RESERVED 0xE */ +/* RESERVED 0xF */ + + +#define CTRL_PS_POLL 0xA +#define CTRL_RTS 0xB +#define CTRL_CTS 0xC +#define CTRL_ACK 0xD +#define CTRL_CF_END 0xE +#define CTRL_END_ACK 0xF + +#define DATA_DATA 0x0 +#define DATA_DATA_CF_ACK 0x1 +#define DATA_DATA_CF_POLL 0x2 +#define DATA_DATA_CF_ACK_POLL 0x3 +#define DATA_NODATA 0x4 +#define DATA_NODATA_CF_ACK 0x5 +#define DATA_NODATA_CF_POLL 0x6 +#define DATA_NODATA_CF_ACK_POLL 0x7 + +#define DATA_QOS_DATA 0x8 +#define DATA_QOS_DATA_CF_ACK 0x9 +#define DATA_QOS_DATA_CF_POLL 0xA +#define DATA_QOS_DATA_CF_ACK_POLL 0xB +#define DATA_QOS_NODATA 0xC +#define DATA_QOS_CF_POLL_NODATA 0xE +#define DATA_QOS_CF_ACK_POLL_NODATA 0xF + +/* + * The subtype field of a data frame is, in effect, composed of 4 flag + * bits - CF-Ack, CF-Poll, Null (means the frame doesn't actually have + * any data), and QoS. + */ +#define DATA_FRAME_IS_CF_ACK(x) ((x) & 0x01) +#define DATA_FRAME_IS_CF_POLL(x) ((x) & 0x02) +#define DATA_FRAME_IS_NULL(x) ((x) & 0x04) +#define DATA_FRAME_IS_QOS(x) ((x) & 0x08) + +/* + * Bits in the frame control field. + */ +#define FC_VERSION(fc) ((fc) & 0x3) +#define FC_TYPE(fc) (((fc) >> 2) & 0x3) +#define FC_SUBTYPE(fc) (((fc) >> 4) & 0xF) +#define FC_TO_DS(fc) ((fc) & 0x0100) +#define FC_FROM_DS(fc) ((fc) & 0x0200) +#define FC_MORE_FLAG(fc) ((fc) & 0x0400) +#define FC_RETRY(fc) ((fc) & 0x0800) +#define FC_POWER_MGMT(fc) ((fc) & 0x1000) +#define FC_MORE_DATA(fc) ((fc) & 0x2000) +#define FC_WEP(fc) ((fc) & 0x4000) +#define FC_ORDER(fc) ((fc) & 0x8000) + +struct mgmt_header_t { + u_int16_t fc; + u_int16_t duration; + u_int8_t da[6]; + u_int8_t sa[6]; + u_int8_t bssid[6]; + u_int16_t seq_ctrl; +}; + +#define MGMT_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+\ + IEEE802_11_DA_LEN+IEEE802_11_SA_LEN+\ + IEEE802_11_BSSID_LEN+IEEE802_11_SEQ_LEN) + +#define CAPABILITY_ESS(cap) ((cap) & 0x0001) +#define CAPABILITY_IBSS(cap) ((cap) & 0x0002) +#define CAPABILITY_CFP(cap) ((cap) & 0x0004) +#define CAPABILITY_CFP_REQ(cap) ((cap) & 0x0008) +#define CAPABILITY_PRIVACY(cap) ((cap) & 0x0010) + +typedef enum { + NOT_PRESENT, + PRESENT, + TRUNCATED +} elem_status_t; + +struct ssid_t { + u_int8_t element_id; + u_int8_t length; + u_char ssid[33]; /* 32 + 1 for null */ +}; + +struct rates_t { + u_int8_t element_id; + u_int8_t length; + u_int8_t rate[16]; +}; + +struct challenge_t { + u_int8_t element_id; + u_int8_t length; + u_int8_t text[254]; /* 1-253 + 1 for null */ +}; + +struct fh_t { + u_int8_t element_id; + u_int8_t length; + u_int16_t dwell_time; + u_int8_t hop_set; + u_int8_t hop_pattern; + u_int8_t hop_index; +}; + +struct ds_t { + u_int8_t element_id; + u_int8_t length; + u_int8_t channel; +}; + +struct cf_t { + u_int8_t element_id; + u_int8_t length; + u_int8_t count; + u_int8_t period; + u_int16_t max_duration; + u_int16_t dur_remaing; +}; + +struct tim_t { + u_int8_t element_id; + u_int8_t length; + u_int8_t count; + u_int8_t period; + u_int8_t bitmap_control; + u_int8_t bitmap[251]; +}; + +#define E_SSID 0 +#define E_RATES 1 +#define E_FH 2 +#define E_DS 3 +#define E_CF 4 +#define E_TIM 5 +#define E_IBSS 6 +/* reserved 7 */ +/* reserved 8 */ +/* reserved 9 */ +/* reserved 10 */ +/* reserved 11 */ +/* reserved 12 */ +/* reserved 13 */ +/* reserved 14 */ +/* reserved 15 */ +/* reserved 16 */ + +#define E_CHALLENGE 16 +/* reserved 17 */ +/* reserved 18 */ +/* reserved 19 */ +/* reserved 16 */ +/* reserved 16 */ + + +struct mgmt_body_t { + u_int8_t timestamp[IEEE802_11_TSTAMP_LEN]; + u_int16_t beacon_interval; + u_int16_t listen_interval; + u_int16_t status_code; + u_int16_t aid; + u_char ap[IEEE802_11_AP_LEN]; + u_int16_t reason_code; + u_int16_t auth_alg; + u_int16_t auth_trans_seq_num; + elem_status_t challenge_status; + struct challenge_t challenge; + u_int16_t capability_info; + elem_status_t ssid_status; + struct ssid_t ssid; + elem_status_t rates_status; + struct rates_t rates; + elem_status_t ds_status; + struct ds_t ds; + elem_status_t cf_status; + struct cf_t cf; + elem_status_t fh_status; + struct fh_t fh; + elem_status_t tim_status; + struct tim_t tim; +}; + +struct ctrl_rts_t { + u_int16_t fc; + u_int16_t duration; + u_int8_t ra[6]; + u_int8_t ta[6]; + u_int8_t fcs[4]; +}; + +#define CTRL_RTS_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+\ + IEEE802_11_RA_LEN+IEEE802_11_TA_LEN) + +struct ctrl_cts_t { + u_int16_t fc; + u_int16_t duration; + u_int8_t ra[6]; + u_int8_t fcs[4]; +}; + +#define CTRL_CTS_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+IEEE802_11_RA_LEN) + +struct ctrl_ack_t { + u_int16_t fc; + u_int16_t duration; + u_int8_t ra[6]; + u_int8_t fcs[4]; +}; + +#define CTRL_ACK_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+IEEE802_11_RA_LEN) + +struct ctrl_ps_poll_t { + u_int16_t fc; + u_int16_t aid; + u_int8_t bssid[6]; + u_int8_t ta[6]; + u_int8_t fcs[4]; +}; + +#define CTRL_PS_POLL_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_AID_LEN+\ + IEEE802_11_BSSID_LEN+IEEE802_11_TA_LEN) + +struct ctrl_end_t { + u_int16_t fc; + u_int16_t duration; + u_int8_t ra[6]; + u_int8_t bssid[6]; + u_int8_t fcs[4]; +}; + +#define CTRL_END_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+\ + IEEE802_11_RA_LEN+IEEE802_11_BSSID_LEN) + +struct ctrl_end_ack_t { + u_int16_t fc; + u_int16_t duration; + u_int8_t ra[6]; + u_int8_t bssid[6]; + u_int8_t fcs[4]; +}; + +#define CTRL_END_ACK_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+\ + IEEE802_11_RA_LEN+IEEE802_11_BSSID_LEN) + +#define IV_IV(iv) ((iv) & 0xFFFFFF) +#define IV_PAD(iv) (((iv) >> 24) & 0x3F) +#define IV_KEYID(iv) (((iv) >> 30) & 0x03) |
