ieee802_11.h

/* @(#) $Header: /tcpdump/master/tcpdump/ieee802_11.h,v 1.9 2003/07/22 17:36:57 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 endorseeeeee
 * 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.
 */
 
#include <stdint.h>

#ifndef __PACMAP_80211_H__
#define __PACMAP_80211_H__

#define BROADCAST (u_char*)"\xFF\xFF\xFF\xFF\xFF\xFF"

#define IEEE80211_LLC_SNAP	 \
"\x08\x00\x00\x00\xDD\xDD\xDD\xDD\xDD\xDD\xBB\xBB\xBB\xBB\xBB\xBB" \
	"\xCC\xCC\xCC\xCC\xCC\xCC\xE0\x32\xAA\xAA\x03\x00\x00\x00\x08\x00"

/* 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
#define	IEEE802_11_QOS_PARMS_LEN	2

/* 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	0xD4
#define	CTRL_CF_END	0xE
#define	CTRL_END_ACK	0xF

#define	DATA_DATA		0x08
#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

/*
 * 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) >> 8
#define	FC_FROM_DS(fc)		((fc) & 0x0200) >> 9
#define	FC_MORE_FLAG(fc)	((fc) & 0x0400) >> 10
#define	FC_RETRY(fc)		((fc) & 0x0800) >> 11
#define	FC_POWER_MGMT(fc)	((fc) & 0x1000) >> 12
#define	FC_MORE_DATA(fc)	((fc) & 0x2000) >> 13
#define	FC_WEP(fc)		((fc) & 0x4000) >> 14
#define	FC_ORDER(fc)		((fc) & 0x8000) >> 15

#define FC_TO_DS_BIT 0x0100
#define FC_FROM_DS_BIT 0x0200

#define FC_MGMT_ASSOC_REQUEST	ST_ASSOC_REQUEST << 4 | T_MGMT << 2
#define FC_MGMT_ASSOC_RESPONSE	ST_ASSOC_RESPONSE << 4 | T_MGMT << 2
#define	FC_MGMT_REASSOC_REQUEST	ST_REASSOC_REQUEST << 4 | T_MGMT << 2
#define	FC_MGMT_REASSOC_RESPONSE	ST_REASSOC_RESPONSE << 4 | T_MGMT << 2
#define	FC_MGMT_PROBE_REQUEST 		ST_PROBE_REQUEST << 4 | T_MGMT << 2
#define	FC_MGMT_PROBE_RESPONSE 		ST_PROBE_RESPONSE << 4 | T_MGMT << 2
#define	FC_MGMT_BEACON 				ST_BEACON << 4 | T_MGMT << 2
#define	FC_MGMT_ATIM				ST_ATIM << 4 | T_MGMT << 2
#define	FC_MGMT_DISASSOC			ST_DISASSOC << 4 | T_MGMT << 2
#define FC_MGMT_AUTH		ST_AUTH << 4 | T_MGMT << 2
#define FC_MGMT_DEAUTH		ST_DEAUTH << 4 | T_MGMT << 2

#define FC_CTRL_ACK	CTRL_ACK << 4 | T_CTRL << 2

#define FC_DATA_DATA	DATA_DATA << 4 | T_DATA << 2
#define FC_DATA_NODATA	DATA_NODATA << 4 | T_DATA << 2


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;
}__attribute__((packed));

u_int16_t	qos_params;

#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	NO_CHANNEL 0
#define	NO_ESSID   ""
#define	NO_CAPABILITY 0

#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)

#define ELEMENT_ID_SSID					0
#define ELEMENT_ID_SUPPORTED_RATES		1
#define	ELEMENT_ID_FH	 	2
#define ELEMENT_ID_CHANNEL				3
#define	ELEMENT_ID_CF	 	4
#define	ELEMENT_ID_TIM	 	5
#define	ELEMENT_ID_IBSS 		6
#define ELEMENT_ID_EDCA					12
#define	ELEMENT_ID_CHALLENGE 	16
#define ELEMENT_ID_CHANSWITCHANN	37
#define ELEMENT_ID_EXT_SUPPORTED_RATES	50
#define ELEMENT_ID_CHALLENGE_TEXT		16
#define ELEMENT_PACMAP_RSSI		0xDD
#define ELEMENT_PACMAP_SEQ		0xDE

#define AUTH_ALGO_OPEN_SYSTEM	0x0000
#define AUTH_ALGO_SHARED_KEY	0x0001

enum {
        IEEE80211_AUTH_OPEN_REQUEST             = 1,
        IEEE80211_AUTH_OPEN_RESPONSE            = 2,
};

/*
 * Reason codes
 *
 * Unlisted codes are reserved
 */
enum {
        IEEE80211_STATUS_SUCCESS                = 0,
        IEEE80211_STATUS_UNSPECIFIED            = 1,
};

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[8];
};

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];
};

struct channel_switch_t {
	u_int8_t	element_id;
	u_int8_t	length;
	u_int8_t	mode;
	u_int8_t	new_channel;
	u_int8_t	count;
};

struct beacon_body_t {
	u_int8_t 	timestamp[8];
	u_int16_t 	beacon_interval;
	u_int16_t	capability_info;
};

struct mgmt_body_t {
	u_int64_t 	timestamp;
	u_int16_t 	beacon_interval;
	/*	u_int16_t 	listen_interval;
	 u_int16_t 	status_code;
	 u_int16_t 	aid;
	 u_char		ap[6];
	 u_int16_t	reason_code;
	 u_int16_t	auth_alg;
	 u_int16_t	auth_trans_seq_num;
	 struct challenge_t challenge;*/
	u_int16_t	capability_info;
	struct ssid_t	ssid;
	struct rates_t 	rates;
	struct ds_t	ds;
	struct cf_t	cf;
	struct fh_t	fh;
	struct tim_t	tim;
	struct channel_switch_t channel_switch;
	u_int8_t pacmap_rssi;
	int pacmap_seq;
	int channel;
};

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)

#define BEACON_INTERVAL 0x064
#define BEACON_INTERVAL_TIMER (BEACON_INTERVAL*1000)
#define RATE_NUM 12

#define RATE_1M 1000000
#define RATE_2M 2000000
#define RATE_5_5M 5500000
#define RATE_11M 11000000

#define RATE_6M 6000000
#define RATE_9M 9000000
#define RATE_12M 12000000
#define RATE_18M 18000000
#define RATE_24M 24000000
#define RATE_36M 36000000
#define RATE_48M 48000000
#define RATE_54M 54000000

#endif /* __PACMAP_80211_H__ */