/*
   * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
   * All rights reserved.
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as published by
   * the Free Software Foundation; either version 2 of the License, or
   * (at your option) any later version.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License along
   * with this program; if not, write to the Free Software Foundation, Inc.,
   * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
   *

   *

   * File: 80211hdr.h
   *

   * Purpose: 802.11 MAC headers related pre-defines and macros.
   *

   *
   * Author: Lyndon Chen
   *
   * Date: Apr 8, 2002
   *
   */

  #ifndef __80211HDR_H__
  #define __80211HDR_H__

  #include "ttype.h"

  /* bit type */

  #define BIT0	0x00000001
  #define BIT1	0x00000002
  #define BIT2	0x00000004
  #define BIT3	0x00000008
  #define BIT4	0x00000010
  #define BIT5	0x00000020
  #define BIT6	0x00000040
  #define BIT7	0x00000080
  #define BIT8	0x00000100
  #define BIT9	0x00000200
  #define BIT10	0x00000400
  #define BIT11	0x00000800
  #define BIT12	0x00001000
  #define BIT13	0x00002000
  #define BIT14	0x00004000
  #define BIT15	0x00008000
  #define BIT16	0x00010000
  #define BIT17	0x00020000
  #define BIT18	0x00040000
  #define BIT19	0x00080000
  #define BIT20	0x00100000
  #define BIT21	0x00200000
  #define BIT22	0x00400000
  #define BIT23	0x00800000
  #define BIT24	0x01000000
  #define BIT25	0x02000000
  #define BIT26	0x04000000
  #define BIT27	0x08000000
  #define BIT28	0x10000000
  #define BIT29	0x20000000
  #define BIT30	0x40000000
  #define BIT31	0x80000000

  /* 802.11 frame related, defined as 802.11 spec */

  #define WLAN_ADDR_LEN               6
  #define WLAN_CRC_LEN                4
  #define WLAN_CRC32_LEN              4
  #define WLAN_FCS_LEN                4
  #define WLAN_BSSID_LEN              6
  #define WLAN_BSS_TS_LEN             8
  #define WLAN_HDR_ADDR2_LEN          16
  #define WLAN_HDR_ADDR3_LEN          24
  #define WLAN_HDR_ADDR4_LEN          30
  #define WLAN_IEHDR_LEN              2
  #define WLAN_SSID_MAXLEN            32

  #define WLAN_RATES_MAXLEN           16
  #define WLAN_RATES_MAXLEN_11B       4
  #define WLAN_RSN_MAXLEN             32
  #define WLAN_DATA_MAXLEN            2312

  #define WLAN_A3FR_MAXLEN            (WLAN_HDR_ADDR3_LEN + WLAN_DATA_MAXLEN + \
  				     WLAN_CRC_LEN)

  #define WLAN_BEACON_FR_MAXLEN       WLAN_A3FR_MAXLEN
  #define WLAN_ATIM_FR_MAXLEN         (WLAN_HDR_ADDR3_LEN + 0)
  #define WLAN_NULLDATA_FR_MAXLEN     (WLAN_HDR_ADDR3_LEN + 0)
  #define WLAN_DISASSOC_FR_MAXLEN     (WLAN_HDR_ADDR3_LEN + 2)
  #define WLAN_ASSOCREQ_FR_MAXLEN     WLAN_A3FR_MAXLEN
  #define WLAN_ASSOCRESP_FR_MAXLEN    WLAN_A3FR_MAXLEN
  #define WLAN_REASSOCREQ_FR_MAXLEN   WLAN_A3FR_MAXLEN
  #define WLAN_REASSOCRESP_FR_MAXLEN  WLAN_A3FR_MAXLEN
  #define WLAN_PROBEREQ_FR_MAXLEN     WLAN_A3FR_MAXLEN
  #define WLAN_PROBERESP_FR_MAXLEN    WLAN_A3FR_MAXLEN
  #define WLAN_AUTHEN_FR_MAXLEN       WLAN_A3FR_MAXLEN
  #define WLAN_DEAUTHEN_FR_MAXLEN     (WLAN_HDR_ADDR3_LEN + 2)

  #define WLAN_WEP_NKEYS              4
  #define WLAN_WEP40_KEYLEN           5
  #define WLAN_WEP104_KEYLEN          13
  #define WLAN_WEP232_KEYLEN          29

  #define WLAN_WEPMAX_KEYLEN          32
  #define WLAN_CHALLENGE_IE_MAXLEN    255
  #define WLAN_CHALLENGE_IE_LEN       130
  #define WLAN_CHALLENGE_LEN          128
  #define WLAN_WEP_IV_LEN             4
  #define WLAN_WEP_ICV_LEN            4
  #define WLAN_FRAGS_MAX              16

  /* Frame Type */

  #define WLAN_TYPE_MGR 0x00
  #define WLAN_TYPE_CTL  0x01
  #define WLAN_TYPE_DATA 0x02
  
  #define WLAN_FTYPE_MGMT 0x00
  #define WLAN_FTYPE_CTL  0x01
  #define WLAN_FTYPE_DATA 0x02

  /* Frame Subtypes */

  #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
  #define WLAN_FSTYPE_ACTION          0x0d

  /* Control */

  #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

  #ifdef __BIG_ENDIAN

  /* GET & SET Frame Control bit */

  #define WLAN_GET_FC_PRVER(n)    (((unsigned short)(n) >> 8) & (BIT0 | BIT1))

  #define WLAN_GET_FC_FTYPE(n)    ((((unsigned short)(n) >> 8) & (BIT2 | BIT3)) >> 2)
  #define WLAN_GET_FC_FSTYPE(n)   ((((unsigned short)(n) >> 8) & (BIT4|BIT5|BIT6|BIT7)) >> 4)
  #define WLAN_GET_FC_TODS(n)     ((((unsigned short)(n) << 8) & (BIT8)) >> 8)
  #define WLAN_GET_FC_FROMDS(n)   ((((unsigned short)(n) << 8) & (BIT9)) >> 9)
  #define WLAN_GET_FC_MOREFRAG(n) ((((unsigned short)(n) << 8) & (BIT10)) >> 10)
  #define WLAN_GET_FC_RETRY(n)    ((((unsigned short)(n) << 8) & (BIT11)) >> 11)
  #define WLAN_GET_FC_PWRMGT(n)   ((((unsigned short)(n) << 8) & (BIT12)) >> 12)
  #define WLAN_GET_FC_MOREDATA(n) ((((unsigned short)(n) << 8) & (BIT13)) >> 13)
  #define WLAN_GET_FC_ISWEP(n)    ((((unsigned short)(n) << 8) & (BIT14)) >> 14)
  #define WLAN_GET_FC_ORDER(n)    ((((unsigned short)(n) << 8) & (BIT15)) >> 15)

  /* Sequence Field bit */

  #define WLAN_GET_SEQ_FRGNUM(n) (((unsigned short)(n) >> 8) & (BIT0|BIT1|BIT2|BIT3))
  #define WLAN_GET_SEQ_SEQNUM(n) ((((unsigned short)(n) >> 8) & (~(BIT0|BIT1|BIT2|BIT3))) >> 4)

  /* Capability Field bit */

  #define WLAN_GET_CAP_INFO_ESS(n)           (((n) >> 8) & BIT0)
  #define WLAN_GET_CAP_INFO_IBSS(n)          ((((n) >> 8) & BIT1) >> 1)
  #define WLAN_GET_CAP_INFO_CFPOLLABLE(n)    ((((n) >> 8) & BIT2) >> 2)
  #define WLAN_GET_CAP_INFO_CFPOLLREQ(n)     ((((n) >> 8) & BIT3) >> 3)
  #define WLAN_GET_CAP_INFO_PRIVACY(n)       ((((n) >> 8) & BIT4) >> 4)
  #define WLAN_GET_CAP_INFO_SHORTPREAMBLE(n) ((((n) >> 8) & BIT5) >> 5)
  #define WLAN_GET_CAP_INFO_PBCC(n)          ((((n) >> 8) & BIT6) >> 6)
  #define WLAN_GET_CAP_INFO_AGILITY(n)       ((((n) >> 8) & BIT7) >> 7)
  #define WLAN_GET_CAP_INFO_SPECTRUMMNG(n)   ((((n))      & BIT8) >> 10)
  #define WLAN_GET_CAP_INFO_SHORTSLOTTIME(n) ((((n))      & BIT10) >> 10)
  #define WLAN_GET_CAP_INFO_DSSSOFDM(n)      ((((n))      & BIT13) >> 13)
  #define WLAN_GET_CAP_INFO_GRPACK(n)        ((((n))      & BIT14) >> 14)

  #else

  /* GET & SET Frame Control bit */

  #define WLAN_GET_FC_PRVER(n)    (((unsigned short)(n)) & (BIT0 | BIT1))
  #define WLAN_GET_FC_FTYPE(n)    ((((unsigned short)(n)) & (BIT2 | BIT3)) >> 2)
  #define WLAN_GET_FC_FSTYPE(n)   ((((unsigned short)(n)) & (BIT4|BIT5|BIT6|BIT7)) >> 4)
  #define WLAN_GET_FC_TODS(n)     ((((unsigned short)(n)) & (BIT8)) >> 8)
  #define WLAN_GET_FC_FROMDS(n)   ((((unsigned short)(n)) & (BIT9)) >> 9)
  #define WLAN_GET_FC_MOREFRAG(n) ((((unsigned short)(n)) & (BIT10)) >> 10)
  #define WLAN_GET_FC_RETRY(n)    ((((unsigned short)(n)) & (BIT11)) >> 11)
  #define WLAN_GET_FC_PWRMGT(n)   ((((unsigned short)(n)) & (BIT12)) >> 12)
  #define WLAN_GET_FC_MOREDATA(n) ((((unsigned short)(n)) & (BIT13)) >> 13)
  #define WLAN_GET_FC_ISWEP(n)    ((((unsigned short)(n)) & (BIT14)) >> 14)
  #define WLAN_GET_FC_ORDER(n)    ((((unsigned short)(n)) & (BIT15)) >> 15)

  /* Sequence Field bit */

  #define WLAN_GET_SEQ_FRGNUM(n) (((unsigned short)(n)) & (BIT0|BIT1|BIT2|BIT3))
  #define WLAN_GET_SEQ_SEQNUM(n) ((((unsigned short)(n)) & (~(BIT0|BIT1|BIT2|BIT3))) >> 4)

  /* Capability Field bit */

  #define WLAN_GET_CAP_INFO_ESS(n)           ((n) & BIT0)
  #define WLAN_GET_CAP_INFO_IBSS(n)          (((n) & BIT1) >> 1)
  #define WLAN_GET_CAP_INFO_CFPOLLABLE(n)    (((n) & BIT2) >> 2)
  #define WLAN_GET_CAP_INFO_CFPOLLREQ(n)     (((n) & BIT3) >> 3)
  #define WLAN_GET_CAP_INFO_PRIVACY(n)       (((n) & BIT4) >> 4)
  #define WLAN_GET_CAP_INFO_SHORTPREAMBLE(n) (((n) & BIT5) >> 5)
  #define WLAN_GET_CAP_INFO_PBCC(n)          (((n) & BIT6) >> 6)
  #define WLAN_GET_CAP_INFO_AGILITY(n)       (((n) & BIT7) >> 7)
  #define WLAN_GET_CAP_INFO_SPECTRUMMNG(n)   (((n) & BIT8) >> 10)
  #define WLAN_GET_CAP_INFO_SHORTSLOTTIME(n) (((n) & BIT10) >> 10)
  #define WLAN_GET_CAP_INFO_DSSSOFDM(n)      (((n) & BIT13) >> 13)
  #define WLAN_GET_CAP_INFO_GRPACK(n)        (((n) & BIT14) >> 14)

  #endif /*#ifdef __BIG_ENDIAN */

  #define WLAN_SET_CAP_INFO_ESS(n)           (n)
  #define WLAN_SET_CAP_INFO_IBSS(n)          ((n) << 1)
  #define WLAN_SET_CAP_INFO_CFPOLLABLE(n)    ((n) << 2)
  #define WLAN_SET_CAP_INFO_CFPOLLREQ(n)     ((n) << 3)
  #define WLAN_SET_CAP_INFO_PRIVACY(n)       ((n) << 4)
  #define WLAN_SET_CAP_INFO_SHORTPREAMBLE(n) ((n) << 5)
  #define WLAN_SET_CAP_INFO_SPECTRUMMNG(n)   ((n) << 8)
  #define WLAN_SET_CAP_INFO_PBCC(n)          ((n) << 6)
  #define WLAN_SET_CAP_INFO_AGILITY(n)       ((n) << 7)
  #define WLAN_SET_CAP_INFO_SHORTSLOTTIME(n) ((n) << 10)
  #define WLAN_SET_CAP_INFO_DSSSOFDM(n)      ((n) << 13)
  #define WLAN_SET_CAP_INFO_GRPACK(n)        ((n) << 14)

  #define WLAN_SET_FC_PRVER(n)    ((unsigned short)(n))
  #define WLAN_SET_FC_FTYPE(n)    (((unsigned short)(n)) << 2)
  #define WLAN_SET_FC_FSTYPE(n)   (((unsigned short)(n)) << 4)
  #define WLAN_SET_FC_TODS(n)     (((unsigned short)(n)) << 8)
  #define WLAN_SET_FC_FROMDS(n)   (((unsigned short)(n)) << 9)
  #define WLAN_SET_FC_MOREFRAG(n) (((unsigned short)(n)) << 10)
  #define WLAN_SET_FC_RETRY(n)    (((unsigned short)(n)) << 11)
  #define WLAN_SET_FC_PWRMGT(n)   (((unsigned short)(n)) << 12)
  #define WLAN_SET_FC_MOREDATA(n) (((unsigned short)(n)) << 13)
  #define WLAN_SET_FC_ISWEP(n)    (((unsigned short)(n)) << 14)
  #define WLAN_SET_FC_ORDER(n)    (((unsigned short)(n)) << 15)

  #define WLAN_SET_SEQ_FRGNUM(n) ((unsigned short)(n))
  #define WLAN_SET_SEQ_SEQNUM(n) (((unsigned short)(n)) << 4)

  /* ERP Field bit */

  
  #define WLAN_GET_ERP_NONERP_PRESENT(n)     ((n) & BIT0)
  #define WLAN_GET_ERP_USE_PROTECTION(n)     (((n) & BIT1) >> 1)
  #define WLAN_GET_ERP_BARKER_MODE(n)        (((n) & BIT2) >> 2)
  
  #define WLAN_SET_ERP_NONERP_PRESENT(n)     (n)
  #define WLAN_SET_ERP_USE_PROTECTION(n)     ((n) << 1)
  #define WLAN_SET_ERP_BARKER_MODE(n)        ((n) << 2)

  /* Support & Basic Rates field */

  #define WLAN_MGMT_IS_BASICRATE(b)    ((b) & BIT7)
  #define WLAN_MGMT_GET_RATE(b)        ((b) & ~BIT7)

  /* TIM field */

  #define WLAN_MGMT_IS_MULTICAST_TIM(b)   ((b) & BIT0)
  #define WLAN_MGMT_GET_TIM_OFFSET(b)     (((b) & ~BIT0) >> 1)

  /* 3-Addr & 4-Addr */

  #define WLAN_HDR_A3_DATA_PTR(p) (((unsigned char *)(p)) + WLAN_HDR_ADDR3_LEN)
  #define WLAN_HDR_A4_DATA_PTR(p) (((unsigned char *)(p)) + WLAN_HDR_ADDR4_LEN)

  /* IEEE ADDR */

  #define IEEE_ADDR_UNIVERSAL         0x02
  #define IEEE_ADDR_GROUP             0x01
  
  typedef struct {

  	unsigned char abyAddr[6];

  } IEEE_ADDR, *PIEEE_ADDR;

  /* 802.11 Header Format */

  
  typedef struct tagWLAN_80211HDR_A2 {

  	unsigned short wFrameCtl;
  	unsigned short wDurationID;
  	unsigned char abyAddr1[WLAN_ADDR_LEN];
  	unsigned char abyAddr2[WLAN_ADDR_LEN];

  } __attribute__ ((__packed__))

  WLAN_80211HDR_A2, *PWLAN_80211HDR_A2;
  
  typedef struct tagWLAN_80211HDR_A3 {

  	unsigned short wFrameCtl;
  	unsigned short wDurationID;
  	unsigned char abyAddr1[WLAN_ADDR_LEN];
  	unsigned char abyAddr2[WLAN_ADDR_LEN];
  	unsigned char abyAddr3[WLAN_ADDR_LEN];
  	unsigned short wSeqCtl;

  } __attribute__ ((__packed__))

  WLAN_80211HDR_A3, *PWLAN_80211HDR_A3;
  
  typedef struct tagWLAN_80211HDR_A4 {

  	unsigned short wFrameCtl;
  	unsigned short wDurationID;
  	unsigned char abyAddr1[WLAN_ADDR_LEN];
  	unsigned char abyAddr2[WLAN_ADDR_LEN];
  	unsigned char abyAddr3[WLAN_ADDR_LEN];
  	unsigned short wSeqCtl;
  	unsigned char abyAddr4[WLAN_ADDR_LEN];

  } __attribute__ ((__packed__))

  WLAN_80211HDR_A4, *PWLAN_80211HDR_A4;

  typedef union tagUWLAN_80211HDR {

  	WLAN_80211HDR_A2        sA2;
  	WLAN_80211HDR_A3        sA3;
  	WLAN_80211HDR_A4        sA4;

  } UWLAN_80211HDR, *PUWLAN_80211HDR;

  #endif /* __80211HDR_H__ */