drivers/staging/wlan-ng/p80211conv.h

   1 /* p80211conv.h
   2 *
   3 * Ether/802.11 conversions and packet buffer routines
   4 *
   5 * Copyright (C) 1999 AbsoluteValue Systems, Inc.  All Rights Reserved.
   6 * --------------------------------------------------------------------
   7 *
   8 * linux-wlan
   9 *
  10 *   The contents of this file are subject to the Mozilla Public
  11 *   License Version 1.1 (the "License"); you may not use this file
  12 *   except in compliance with the License. You may obtain a copy of
  13 *   the License at http://www.mozilla.org/MPL/
  14 *
  15 *   Software distributed under the License is distributed on an "AS
  16 *   IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
  17 *   implied. See the License for the specific language governing
  18 *   rights and limitations under the License.
  19 *
  20 *   Alternatively, the contents of this file may be used under the
  21 *   terms of the GNU Public License version 2 (the "GPL"), in which
  22 *   case the provisions of the GPL are applicable instead of the
  23 *   above.  If you wish to allow the use of your version of this file
  24 *   only under the terms of the GPL and not to allow others to use
  25 *   your version of this file under the MPL, indicate your decision
  26 *   by deleting the provisions above and replace them with the notice
  27 *   and other provisions required by the GPL.  If you do not delete
  28 *   the provisions above, a recipient may use your version of this
  29 *   file under either the MPL or the GPL.
  30 *
  31 * --------------------------------------------------------------------
  32 *
  33 * Inquiries regarding the linux-wlan Open Source project can be
  34 * made directly to:
  35 *
  36 * AbsoluteValue Systems Inc.
  37 * info@linux-wlan.com
  38 * http://www.linux-wlan.com
  39 *
  40 * --------------------------------------------------------------------
  41 *
  42 * Portions of the development of this software were funded by
  43 * Intersil Corporation as part of PRISM(R) chipset product development.
  44 *
  45 * --------------------------------------------------------------------
  46 *
  47 * This file declares the functions, types and macros that perform
  48 * Ethernet to/from 802.11 frame conversions.
  49 *
  50 * --------------------------------------------------------------------
  51 */
  52
  53 #ifndef _LINUX_P80211CONV_H
  54 #define _LINUX_P80211CONV_H
  55
  56 /*================================================================*/
  57 /* Constants */
  58
  59 #define WLAN_ETHADDR_LEN        6
  60 #define WLAN_IEEE_OUI_LEN       3
  61
  62 #define WLAN_ETHCONV_ENCAP      1
  63 #define WLAN_ETHCONV_RFC1042    2
  64 #define WLAN_ETHCONV_8021h      3
  65
  66 #define WLAN_MIN_ETHFRM_LEN     60
  67 #define WLAN_MAX_ETHFRM_LEN     1514
  68 #define WLAN_ETHHDR_LEN         14
  69
  70 #define P80211CAPTURE_VERSION   0x80211001
  71
  72 /*================================================================*/
  73 /* Macros */
  74
  75 #define P80211_FRMMETA_MAGIC            0x802110
  76
  77 #define P80211SKB_FRMMETA(s) \
  78         (((((p80211_frmmeta_t*)((s)->cb))->magic)==P80211_FRMMETA_MAGIC) ? \
  79                 ((p80211_frmmeta_t*)((s)->cb)) : \
  80                 (NULL))
  81
  82 #define P80211SKB_RXMETA(s) \
  83         (P80211SKB_FRMMETA((s)) ?  P80211SKB_FRMMETA((s))->rx : ((p80211_rxmeta_t*)(NULL)))
  84
  85 typedef struct p80211_rxmeta
  86 {
  87         struct wlandevice       *wlandev;
  88
  89         u64     mactime;        /* Hi-rez MAC-supplied time value */
  90         u64     hosttime;       /* Best-rez host supplied time value */
  91
  92         unsigned int    rxrate;         /* Receive data rate in 100kbps */
  93         unsigned int    priority;       /* 0-15, 0=contention, 6=CF */
  94         int     signal;         /* An SSI, see p80211netdev.h */
  95         int     noise;          /* An SSI, see p80211netdev.h */
  96         unsigned int    channel;        /* Receive channel (mostly for snifs) */
  97         unsigned int    preamble;       /* P80211ENUM_preambletype_* */
  98         unsigned int    encoding;       /* P80211ENUM_encoding_* */
  99
 100 } p80211_rxmeta_t;
 101
 102 typedef struct p80211_frmmeta
 103 {
 104         unsigned int                    magic;
 105         p80211_rxmeta_t         *rx;
 106 } p80211_frmmeta_t;
 107
 108 void p80211skb_free(struct wlandevice *wlandev, struct sk_buff *skb);
 109 int p80211skb_rxmeta_attach(struct wlandevice *wlandev, struct sk_buff *skb);
 110 void p80211skb_rxmeta_detach(struct sk_buff *skb);
 111
 112 /*================================================================*/
 113 /* Types */
 114
 115 /*
 116  * Frame capture header.  (See doc/capturefrm.txt)
 117  */
 118 typedef struct p80211_caphdr
 119 {
 120         u32             version;
 121         u32             length;
 122         u64             mactime;
 123         u64             hosttime;
 124         u32             phytype;
 125         u32             channel;
 126         u32             datarate;
 127         u32             antenna;
 128         u32             priority;
 129         u32             ssi_type;
 130         s32             ssi_signal;
 131         s32             ssi_noise;
 132         u32             preamble;
 133         u32             encoding;
 134 } p80211_caphdr_t;
 135
 136 /* buffer free method pointer type */
 137 typedef void (* freebuf_method_t)(void *buf, int size);
 138
 139 typedef struct p80211_metawep {
 140         void  *data;
 141         u8 iv[4];
 142         u8 icv[4];
 143 } p80211_metawep_t;
 144
 145 /* local ether header type */
 146 typedef struct wlan_ethhdr
 147 {
 148         u8      daddr[WLAN_ETHADDR_LEN];
 149         u8      saddr[WLAN_ETHADDR_LEN];
 150         u16     type;
 151 } __WLAN_ATTRIB_PACK__ wlan_ethhdr_t;
 152
 153 /* local llc header type */
 154 typedef struct wlan_llc
 155 {
 156         u8      dsap;
 157         u8      ssap;
 158         u8      ctl;
 159 } __WLAN_ATTRIB_PACK__ wlan_llc_t;
 160
 161 /* local snap header type */
 162 typedef struct wlan_snap
 163 {
 164         u8      oui[WLAN_IEEE_OUI_LEN];
 165         u16     type;
 166 } __WLAN_ATTRIB_PACK__ wlan_snap_t;
 167
 168 /* Circular include trick */
 169 struct wlandevice;
 170
 171 /*================================================================*/
 172 /* Externs */
 173
 174 /*================================================================*/
 175 /*Function Declarations */
 176
 177 int skb_p80211_to_ether( struct wlandevice *wlandev, u32 ethconv,
 178                          struct sk_buff *skb);
 179 int skb_ether_to_p80211( struct wlandevice *wlandev, u32 ethconv,
 180                          struct sk_buff *skb, p80211_hdr_t *p80211_hdr,
 181                          p80211_metawep_t *p80211_wep );
 182
 183 int p80211_stt_findproto(u16 proto);
 184 int p80211_stt_addproto(u16 proto);
 185
 186 #endif