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 #define WLAN_ETHADDR_LEN        6
  57 #define WLAN_IEEE_OUI_LEN       3
  58
  59 #define WLAN_ETHCONV_ENCAP      1
  60 #define WLAN_ETHCONV_8021h      3
  61
  62 #define WLAN_ETHHDR_LEN         14
  63
  64 #define P80211CAPTURE_VERSION   0x80211001
  65
  66 #define P80211_FRMMETA_MAGIC    0x802110
  67
  68 #define P80211SKB_FRMMETA(s) \
  69         (((((struct p80211_frmmeta *)((s)->cb))->magic) == \
  70                 P80211_FRMMETA_MAGIC) ? \
  71                 ((struct p80211_frmmeta *)((s)->cb)) : \
  72                 (NULL))
  73
  74 #define P80211SKB_RXMETA(s) \
  75         (P80211SKB_FRMMETA((s)) ?  P80211SKB_FRMMETA((s))->rx : \
  76                 ((struct p80211_rxmeta *)(NULL)))
  77
  78 struct p80211_rxmeta {
  79         struct wlandevice *wlandev;
  80
  81         u64 mactime;            /* Hi-rez MAC-supplied time value */
  82         u64 hosttime;           /* Best-rez host supplied time value */
  83
  84         unsigned int rxrate;    /* Receive data rate in 100kbps */
  85         unsigned int priority;  /* 0-15, 0=contention, 6=CF */
  86         int signal;             /* An SSI, see p80211netdev.h */
  87         int noise;              /* An SSI, see p80211netdev.h */
  88         unsigned int channel;   /* Receive channel (mostly for snifs) */
  89         unsigned int preamble;  /* P80211ENUM_preambletype_* */
  90         unsigned int encoding;  /* P80211ENUM_encoding_* */
  91
  92 };
  93
  94 struct p80211_frmmeta {
  95         unsigned int magic;
  96         struct p80211_rxmeta *rx;
  97 };
  98
  99 void p80211skb_free(struct wlandevice *wlandev, struct sk_buff *skb);
 100 int p80211skb_rxmeta_attach(struct wlandevice *wlandev, struct sk_buff *skb);
 101 void p80211skb_rxmeta_detach(struct sk_buff *skb);
 102
 103 /*
 104  * Frame capture header.  (See doc/capturefrm.txt)
 105  */
 106 struct p80211_caphdr {
 107         u32 version;
 108         u32 length;
 109         u64 mactime;
 110         u64 hosttime;
 111         u32 phytype;
 112         u32 channel;
 113         u32 datarate;
 114         u32 antenna;
 115         u32 priority;
 116         u32 ssi_type;
 117         s32 ssi_signal;
 118         s32 ssi_noise;
 119         u32 preamble;
 120         u32 encoding;
 121 };
 122
 123 /* buffer free method pointer type */
 124 typedef void (*freebuf_method_t) (void *buf, int size);
 125
 126 struct p80211_metawep {
 127         void *data;
 128         u8 iv[4];
 129         u8 icv[4];
 130 };
 131
 132 /* local ether header type */
 133 struct wlan_ethhdr {
 134         u8 daddr[WLAN_ETHADDR_LEN];
 135         u8 saddr[WLAN_ETHADDR_LEN];
 136         u16 type;
 137 } __packed;
 138
 139 /* local llc header type */
 140 struct wlan_llc {
 141         u8 dsap;
 142         u8 ssap;
 143         u8 ctl;
 144 } __packed;
 145
 146 /* local snap header type */
 147 struct wlan_snap {
 148         u8 oui[WLAN_IEEE_OUI_LEN];
 149         u16 type;
 150 } __packed;
 151
 152 /* Circular include trick */
 153 struct wlandevice;
 154
 155 int skb_p80211_to_ether(struct wlandevice *wlandev, u32 ethconv,
 156                         struct sk_buff *skb);
 157 int skb_ether_to_p80211(struct wlandevice *wlandev, u32 ethconv,
 158                         struct sk_buff *skb, union p80211_hdr *p80211_hdr,
 159                         struct p80211_metawep *p80211_wep);
 160
 161 int p80211_stt_findproto(u16 proto);
 162
 163 #endif