/* @(#) $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_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)