drivers/staging/wlan-ng/p80211hdr.h - linux - Git at Google

 /* p80211hdr.h
 *
 * Macros, types, and functions for handling 802.11 MAC headers
 *
 * Copyright (C) 1999 AbsoluteValue Systems, Inc.  All Rights Reserved.
 * --------------------------------------------------------------------
 *
 * linux-wlan
 *
 *   The contents of this file are subject to the Mozilla Public
 *   License Version 1.1 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.mozilla.org/MPL/
 *
 *   Software distributed under the License is distributed on an "AS
 *   IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 *   implied. See the License for the specific language governing
 *   rights and limitations under the License.
 *
 *   Alternatively, the contents of this file may be used under the
 *   terms of the GNU Public License version 2 (the "GPL"), in which
 *   case the provisions of the GPL are applicable instead of the
 *   above.  If you wish to allow the use of your version of this file
 *   only under the terms of the GPL and not to allow others to use
 *   your version of this file under the MPL, indicate your decision
 *   by deleting the provisions above and replace them with the notice
 *   and other provisions required by the GPL.  If you do not delete
 *   the provisions above, a recipient may use your version of this
 *   file under either the MPL or the GPL.
 *
 * --------------------------------------------------------------------
 *
 * Inquiries regarding the linux-wlan Open Source project can be
 * made directly to:
 *
 * AbsoluteValue Systems Inc.
 * info@linux-wlan.com
 * http://www.linux-wlan.com
 *
 * --------------------------------------------------------------------
 *
 * Portions of the development of this software were funded by
 * Intersil Corporation as part of PRISM(R) chipset product development.
 *
 * --------------------------------------------------------------------
 *
 * This file declares the constants and types used in the interface
 * between a wlan driver and the user mode utilities.
 *
 * Note:
 *  - Constant values are always in HOST byte order.  To assign
 *    values to multi-byte fields they _must_ be converted to
 *    ieee byte order.  To retrieve multi-byte values from incoming
 *    frames, they must be converted to host order.
 *
 * All functions declared here are implemented in p80211.c
 * --------------------------------------------------------------------
 */

 #ifndef _P80211HDR_H
 #define _P80211HDR_H

 /*================================================================*/
 /* System Includes */

 #include <linux/if_ether.h>

 /*================================================================*/
 /* Project Includes */

 /*================================================================*/
 /* Constants */

 /*--- Sizes -----------------------------------------------*/
 #define WLAN_CRC_LEN			4
 #define WLAN_BSSID_LEN			6
 #define WLAN_HDR_A3_LEN			24
 #define WLAN_HDR_A4_LEN			30
 #define WLAN_SSID_MAXLEN		32
 #define WLAN_DATA_MAXLEN		2312
 #define WLAN_WEP_IV_LEN			4
 #define WLAN_WEP_ICV_LEN		4

 /*--- Frame Control Field -------------------------------------*/
 /* Frame Types */
 #define WLAN_FTYPE_MGMT			0x00
 #define WLAN_FTYPE_CTL			0x01
 #define WLAN_FTYPE_DATA			0x02

 /* Frame subtypes */
 /* Management */
 #define WLAN_FSTYPE_ASSOCREQ		0x00
 #define WLAN_FSTYPE_ASSOCRESP		0x01
 #define WLAN_FSTYPE_REASSOCREQ		0x02
 #define WLAN_FSTYPE_REASSOCRESP		0x03
 #define WLAN_FSTYPE_PROBEREQ		0x04
 #define WLAN_FSTYPE_PROBERESP		0x05
 #define WLAN_FSTYPE_BEACON		0x08
 #define WLAN_FSTYPE_ATIM		0x09
 #define WLAN_FSTYPE_DISASSOC		0x0a
 #define WLAN_FSTYPE_AUTHEN		0x0b
 #define WLAN_FSTYPE_DEAUTHEN		0x0c

 /* Control */
 #define WLAN_FSTYPE_BLOCKACKREQ		0x8
 #define WLAN_FSTYPE_BLOCKACK  		0x9
 #define WLAN_FSTYPE_PSPOLL		0x0a
 #define WLAN_FSTYPE_RTS			0x0b
 #define WLAN_FSTYPE_CTS			0x0c
 #define WLAN_FSTYPE_ACK			0x0d
 #define WLAN_FSTYPE_CFEND		0x0e
 #define WLAN_FSTYPE_CFENDCFACK		0x0f

 /* Data */
 #define WLAN_FSTYPE_DATAONLY		0x00
 #define WLAN_FSTYPE_DATA_CFACK		0x01
 #define WLAN_FSTYPE_DATA_CFPOLL		0x02
 #define WLAN_FSTYPE_DATA_CFACK_CFPOLL	0x03
 #define WLAN_FSTYPE_NULL		0x04
 #define WLAN_FSTYPE_CFACK		0x05
 #define WLAN_FSTYPE_CFPOLL		0x06
 #define WLAN_FSTYPE_CFACK_CFPOLL	0x07

 /*================================================================*/
 /* Macros */

 /*--- FC Macros ----------------------------------------------*/
 /* Macros to get/set the bitfields of the Frame Control Field */
 /*  GET_FC_??? - takes the host byte-order value of an FC     */
 /*               and retrieves the value of one of the        */
 /*               bitfields and moves that value so its lsb is */
 /*               in bit 0.                                    */
 /*  SET_FC_??? - takes a host order value for one of the FC   */
 /*               bitfields and moves it to the proper bit     */
 /*               location for ORing into a host order FC.     */
 /*               To send the FC produced from SET_FC_???,     */
 /*               one must put the bytes in IEEE order.        */
 /*  e.g.                                                      */
 /*     printf("the frame subtype is %x",                      */
 /*                 GET_FC_FTYPE( ieee2host( rx.fc )))         */
 /*                                                            */
 /*     tx.fc = host2ieee( SET_FC_FTYPE(WLAN_FTYP_CTL) |       */
 /*                        SET_FC_FSTYPE(WLAN_FSTYPE_RTS) );   */
 /*------------------------------------------------------------*/

 #define WLAN_GET_FC_FTYPE(n)	((((u16)(n)) & (BIT(2) | BIT(3))) >> 2)
 #define WLAN_GET_FC_FSTYPE(n)	((((u16)(n)) & (BIT(4)|BIT(5)|BIT(6)|BIT(7))) >> 4)
 #define WLAN_GET_FC_TODS(n) 	((((u16)(n)) & (BIT(8))) >> 8)
 #define WLAN_GET_FC_FROMDS(n)	((((u16)(n)) & (BIT(9))) >> 9)
 #define WLAN_GET_FC_ISWEP(n)	((((u16)(n)) & (BIT(14))) >> 14)

 #define WLAN_SET_FC_FTYPE(n)	(((u16)(n)) << 2)
 #define WLAN_SET_FC_FSTYPE(n)	(((u16)(n)) << 4)
 #define WLAN_SET_FC_TODS(n) 	(((u16)(n)) << 8)
 #define WLAN_SET_FC_FROMDS(n)	(((u16)(n)) << 9)
 #define WLAN_SET_FC_ISWEP(n)	(((u16)(n)) << 14)

 #define DOT11_RATE5_ISBASIC_GET(r)     (((u8)(r)) & BIT(7))

 /*================================================================*/
 /* Types */

 /* Generic 802.11 Header types */

 typedef struct p80211_hdr_a3 {
 	u16 fc;
 	u16 dur;
 	u8 a1[ETH_ALEN];
 	u8 a2[ETH_ALEN];
 	u8 a3[ETH_ALEN];
 	u16 seq;
 } __attribute__ ((packed)) p80211_hdr_a3_t;

 typedef struct p80211_hdr_a4 {
 	u16 fc;
 	u16 dur;
 	u8 a1[ETH_ALEN];
 	u8 a2[ETH_ALEN];
 	u8 a3[ETH_ALEN];
 	u16 seq;
 	u8 a4[ETH_ALEN];
 } __attribute__ ((packed)) p80211_hdr_a4_t;

 typedef union p80211_hdr {
 	p80211_hdr_a3_t a3;
 	p80211_hdr_a4_t a4;
 } __attribute__ ((packed)) p80211_hdr_t;

 /* Frame and header length macros */

 #define WLAN_CTL_FRAMELEN(fstype) (\
 	(fstype) == WLAN_FSTYPE_BLOCKACKREQ	? 24 : \
 	(fstype) == WLAN_FSTYPE_BLOCKACK   	? 152 : \
 	(fstype) == WLAN_FSTYPE_PSPOLL		? 20 : \
 	(fstype) == WLAN_FSTYPE_RTS		? 20 : \
 	(fstype) == WLAN_FSTYPE_CTS		? 14 : \
 	(fstype) == WLAN_FSTYPE_ACK		? 14 : \
 	(fstype) == WLAN_FSTYPE_CFEND		? 20 : \
 	(fstype) == WLAN_FSTYPE_CFENDCFACK	? 20 : 4)

 #define WLAN_FCS_LEN			4

 /* ftcl in HOST order */
 static inline u16 p80211_headerlen(u16 fctl)
 {
 	u16 hdrlen = 0;

 	switch (WLAN_GET_FC_FTYPE(fctl)) {
 	case WLAN_FTYPE_MGMT:
 		hdrlen = WLAN_HDR_A3_LEN;
 		break;
 	case WLAN_FTYPE_DATA:
 		hdrlen = WLAN_HDR_A3_LEN;
 		if (WLAN_GET_FC_TODS(fctl) && WLAN_GET_FC_FROMDS(fctl))
 			hdrlen += ETH_ALEN;
 		break;
 	case WLAN_FTYPE_CTL:
 		hdrlen = WLAN_CTL_FRAMELEN(WLAN_GET_FC_FSTYPE(fctl)) -
 		    WLAN_FCS_LEN;
 		break;
 	default:
 		hdrlen = WLAN_HDR_A3_LEN;
 	}

 	return hdrlen;
 }

 #endif /* _P80211HDR_H */
	/* p80211hdr.h
	*
	* Macros, types, and functions for handling 802.11 MAC headers
	*
	* Copyright (C) 1999 AbsoluteValue Systems, Inc. All Rights Reserved.
	* --------------------------------------------------------------------
	*
	* linux-wlan
	*
	* The contents of this file are subject to the Mozilla Public
	* License Version 1.1 (the "License"); you may not use this file
	* except in compliance with the License. You may obtain a copy of
	* the License at http://www.mozilla.org/MPL/
	*
	* Software distributed under the License is distributed on an "AS
	* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
	* implied. See the License for the specific language governing
	* rights and limitations under the License.
	*
	* Alternatively, the contents of this file may be used under the
	* terms of the GNU Public License version 2 (the "GPL"), in which
	* case the provisions of the GPL are applicable instead of the
	* above. If you wish to allow the use of your version of this file
	* only under the terms of the GPL and not to allow others to use
	* your version of this file under the MPL, indicate your decision
	* by deleting the provisions above and replace them with the notice
	* and other provisions required by the GPL. If you do not delete
	* the provisions above, a recipient may use your version of this
	* file under either the MPL or the GPL.
	*
	* --------------------------------------------------------------------
	*
	* Inquiries regarding the linux-wlan Open Source project can be
	* made directly to:
	*
	* AbsoluteValue Systems Inc.
	* info@linux-wlan.com
	* http://www.linux-wlan.com
	*
	* --------------------------------------------------------------------
	*
	* Portions of the development of this software were funded by
	* Intersil Corporation as part of PRISM(R) chipset product development.
	*
	* --------------------------------------------------------------------
	*
	* This file declares the constants and types used in the interface
	* between a wlan driver and the user mode utilities.
	*
	* Note:
	* - Constant values are always in HOST byte order. To assign
	* values to multi-byte fields they _must_ be converted to
	* ieee byte order. To retrieve multi-byte values from incoming
	* frames, they must be converted to host order.
	*
	* All functions declared here are implemented in p80211.c
	* --------------------------------------------------------------------
	*/

	#ifndef _P80211HDR_H
	#define _P80211HDR_H

	/================================================================/
	/* System Includes */

	#include <linux/if_ether.h>

	/================================================================/
	/* Project Includes */

	/================================================================/
	/* Constants */

	/--- Sizes -----------------------------------------------/
	#define WLAN_CRC_LEN 4
	#define WLAN_BSSID_LEN 6
	#define WLAN_HDR_A3_LEN 24
	#define WLAN_HDR_A4_LEN 30
	#define WLAN_SSID_MAXLEN 32
	#define WLAN_DATA_MAXLEN 2312
	#define WLAN_WEP_IV_LEN 4
	#define WLAN_WEP_ICV_LEN 4

	/--- Frame Control Field -------------------------------------/
	/* Frame Types */
	#define WLAN_FTYPE_MGMT 0x00
	#define WLAN_FTYPE_CTL 0x01
	#define WLAN_FTYPE_DATA 0x02

	/* Frame subtypes */
	/* Management */
	#define WLAN_FSTYPE_ASSOCREQ 0x00
	#define WLAN_FSTYPE_ASSOCRESP 0x01
	#define WLAN_FSTYPE_REASSOCREQ 0x02
	#define WLAN_FSTYPE_REASSOCRESP 0x03
	#define WLAN_FSTYPE_PROBEREQ 0x04
	#define WLAN_FSTYPE_PROBERESP 0x05
	#define WLAN_FSTYPE_BEACON 0x08
	#define WLAN_FSTYPE_ATIM 0x09
	#define WLAN_FSTYPE_DISASSOC 0x0a
	#define WLAN_FSTYPE_AUTHEN 0x0b
	#define WLAN_FSTYPE_DEAUTHEN 0x0c

	/* Control */
	#define WLAN_FSTYPE_BLOCKACKREQ 0x8
	#define WLAN_FSTYPE_BLOCKACK 0x9
	#define WLAN_FSTYPE_PSPOLL 0x0a
	#define WLAN_FSTYPE_RTS 0x0b
	#define WLAN_FSTYPE_CTS 0x0c
	#define WLAN_FSTYPE_ACK 0x0d
	#define WLAN_FSTYPE_CFEND 0x0e
	#define WLAN_FSTYPE_CFENDCFACK 0x0f

	/* Data */
	#define WLAN_FSTYPE_DATAONLY 0x00
	#define WLAN_FSTYPE_DATA_CFACK 0x01
	#define WLAN_FSTYPE_DATA_CFPOLL 0x02
	#define WLAN_FSTYPE_DATA_CFACK_CFPOLL 0x03
	#define WLAN_FSTYPE_NULL 0x04
	#define WLAN_FSTYPE_CFACK 0x05
	#define WLAN_FSTYPE_CFPOLL 0x06
	#define WLAN_FSTYPE_CFACK_CFPOLL 0x07

	/================================================================/
	/* Macros */

	/--- FC Macros ----------------------------------------------/
	/* Macros to get/set the bitfields of the Frame Control Field */
	/* GET_FC_??? - takes the host byte-order value of an FC */
	/* and retrieves the value of one of the */
	/* bitfields and moves that value so its lsb is */
	/* in bit 0. */
	/* SET_FC_??? - takes a host order value for one of the FC */
	/* bitfields and moves it to the proper bit */
	/* location for ORing into a host order FC. */
	/* To send the FC produced from SET_FC_???, */
	/* one must put the bytes in IEEE order. */
	/* e.g. */
	/* printf("the frame subtype is %x", */
	/* GET_FC_FTYPE( ieee2host( rx.fc ))) */
	/* */
	/* tx.fc = host2ieee( SET_FC_FTYPE(WLAN_FTYP_CTL) \| */
	/* SET_FC_FSTYPE(WLAN_FSTYPE_RTS) ); */
	/------------------------------------------------------------/

	#define WLAN_GET_FC_FTYPE(n) ((((u16)(n)) & (BIT(2) \| BIT(3))) >> 2)
	#define WLAN_GET_FC_FSTYPE(n) ((((u16)(n)) & (BIT(4)\|BIT(5)\|BIT(6)\|BIT(7))) >> 4)
	#define WLAN_GET_FC_TODS(n) ((((u16)(n)) & (BIT(8))) >> 8)
	#define WLAN_GET_FC_FROMDS(n) ((((u16)(n)) & (BIT(9))) >> 9)
	#define WLAN_GET_FC_ISWEP(n) ((((u16)(n)) & (BIT(14))) >> 14)

	#define WLAN_SET_FC_FTYPE(n) (((u16)(n)) << 2)
	#define WLAN_SET_FC_FSTYPE(n) (((u16)(n)) << 4)
	#define WLAN_SET_FC_TODS(n) (((u16)(n)) << 8)
	#define WLAN_SET_FC_FROMDS(n) (((u16)(n)) << 9)
	#define WLAN_SET_FC_ISWEP(n) (((u16)(n)) << 14)

	#define DOT11_RATE5_ISBASIC_GET(r) (((u8)(r)) & BIT(7))

	/================================================================/
	/* Types */

	/* Generic 802.11 Header types */

	typedef struct p80211_hdr_a3 {
	u16 fc;
	u16 dur;
	u8 a1[ETH_ALEN];
	u8 a2[ETH_ALEN];
	u8 a3[ETH_ALEN];
	u16 seq;
	} __attribute__ ((packed)) p80211_hdr_a3_t;

	typedef struct p80211_hdr_a4 {
	u16 fc;
	u16 dur;
	u8 a1[ETH_ALEN];
	u8 a2[ETH_ALEN];
	u8 a3[ETH_ALEN];
	u16 seq;
	u8 a4[ETH_ALEN];
	} __attribute__ ((packed)) p80211_hdr_a4_t;

	typedef union p80211_hdr {
	p80211_hdr_a3_t a3;
	p80211_hdr_a4_t a4;
	} __attribute__ ((packed)) p80211_hdr_t;

	/* Frame and header length macros */

	#define WLAN_CTL_FRAMELEN(fstype) (\
	(fstype) == WLAN_FSTYPE_BLOCKACKREQ ? 24 : \
	(fstype) == WLAN_FSTYPE_BLOCKACK ? 152 : \
	(fstype) == WLAN_FSTYPE_PSPOLL ? 20 : \
	(fstype) == WLAN_FSTYPE_RTS ? 20 : \
	(fstype) == WLAN_FSTYPE_CTS ? 14 : \
	(fstype) == WLAN_FSTYPE_ACK ? 14 : \
	(fstype) == WLAN_FSTYPE_CFEND ? 20 : \
	(fstype) == WLAN_FSTYPE_CFENDCFACK ? 20 : 4)

	#define WLAN_FCS_LEN 4

	/* ftcl in HOST order */
	static inline u16 p80211_headerlen(u16 fctl)
	{
	u16 hdrlen = 0;

	switch (WLAN_GET_FC_FTYPE(fctl)) {
	case WLAN_FTYPE_MGMT:
	hdrlen = WLAN_HDR_A3_LEN;
	break;
	case WLAN_FTYPE_DATA:
	hdrlen = WLAN_HDR_A3_LEN;
	if (WLAN_GET_FC_TODS(fctl) && WLAN_GET_FC_FROMDS(fctl))
	hdrlen += ETH_ALEN;
	break;
	case WLAN_FTYPE_CTL:
	hdrlen = WLAN_CTL_FRAMELEN(WLAN_GET_FC_FSTYPE(fctl)) -
	WLAN_FCS_LEN;
	break;
	default:
	hdrlen = WLAN_HDR_A3_LEN;
	}

	return hdrlen;
	}

	#endif /* _P80211HDR_H */