| /* @(#) $Header: /tcpdump/master/tcpdump/ieee802_11.h,v 1.12 2007-07-22 19:59:06 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_CTL_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 |
| #define ST_ACTION 0xD |
| /* RESERVED 0xE */ |
| /* RESERVED 0xF */ |
| |
| |
| #define CTRL_CONTROL_WRAPPER 0x7 |
| #define CTRL_BAR 0x8 |
| #define CTRL_BA 0x9 |
| #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) |
| |
| 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; |
| int challenge_present; |
| struct challenge_t challenge; |
| u_int16_t capability_info; |
| int ssid_present; |
| struct ssid_t ssid; |
| int rates_present; |
| struct rates_t rates; |
| int ds_present; |
| struct ds_t ds; |
| int cf_present; |
| struct cf_t cf; |
| int fh_present; |
| struct fh_t fh; |
| int tim_present; |
| 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) |
| |
| struct ctrl_ba_t { |
| u_int16_t fc; |
| u_int16_t duration; |
| u_int8_t ra[6]; |
| u_int8_t fcs[4]; |
| }; |
| |
| #define CTRL_BA_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+IEEE802_11_RA_LEN) |
| |
| struct ctrl_bar_t { |
| u_int16_t fc; |
| u_int16_t dur; |
| u_int8_t ra[6]; |
| u_int8_t ta[6]; |
| u_int16_t ctl; |
| u_int16_t seq; |
| u_int8_t fcs[4]; |
| }; |
| |
| #define CTRL_BAR_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+\ |
| IEEE802_11_RA_LEN+IEEE802_11_TA_LEN+\ |
| IEEE802_11_CTL_LEN+IEEE802_11_SEQ_LEN) |
| |
| struct meshcntl_t { |
| u_int8_t flags; |
| u_int8_t ttl; |
| u_int8_t seq[4]; |
| u_int8_t addr4[6]; |
| u_int8_t addr5[6]; |
| u_int8_t addr6[6]; |
| }; |
| |
| #define IV_IV(iv) ((iv) & 0xFFFFFF) |
| #define IV_PAD(iv) (((iv) >> 24) & 0x3F) |
| #define IV_KEYID(iv) (((iv) >> 30) & 0x03) |