drivers/staging/wlan-ng/p80211conv.h

   1 /* SPDX-License-Identifier: (GPL-2.0 OR MPL-1.1) */
   2 /* p80211conv.h
   3  *
   4  * Ether/802.11 conversions and packet buffer routines
   5  *
   6  * Copyright (C) 1999 AbsoluteValue Systems, Inc.  All Rights Reserved.
   7  * --------------------------------------------------------------------
   8  *
   9  * linux-wlan
  10  *
  11  *   The contents of this file are subject to the Mozilla Public
  12  *   License Version 1.1 (the "License"); you may not use this file
  13  *   except in compliance with the License. You may obtain a copy of
  14  *   the License at http://www.mozilla.org/MPL/
  15  *
  16  *   Software distributed under the License is distributed on an "AS
  17  *   IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
  18  *   implied. See the License for the specific language governing
  19  *   rights and limitations under the License.
  20  *
  21  *   Alternatively, the contents of this file may be used under the
  22  *   terms of the GNU Public License version 2 (the "GPL"), in which
  23  *   case the provisions of the GPL are applicable instead of the
  24  *   above.  If you wish to allow the use of your version of this file
  25  *   only under the terms of the GPL and not to allow others to use
  26  *   your version of this file under the MPL, indicate your decision
  27  *   by deleting the provisions above and replace them with the notice
  28  *   and other provisions required by the GPL.  If you do not delete
  29  *   the provisions above, a recipient may use your version of this
  30  *   file under either the MPL or the GPL.
  31  *
  32  * --------------------------------------------------------------------
  33  *
  34  * Inquiries regarding the linux-wlan Open Source project can be
  35  * made directly to:
  36  *
  37  * AbsoluteValue Systems Inc.
  38  * info@linux-wlan.com
  39  * http://www.linux-wlan.com
  40  *
  41  * --------------------------------------------------------------------
  42  *
  43  * Portions of the development of this software were funded by
  44  * Intersil Corporation as part of PRISM(R) chipset product development.
  45  *
  46  * --------------------------------------------------------------------
  47  *
  48  * This file declares the functions, types and macros that perform
  49  * Ethernet to/from 802.11 frame conversions.
  50  *
  51  * --------------------------------------------------------------------
  52  */
  53
  54 #ifndef _LINUX_P80211CONV_H
  55 #define _LINUX_P80211CONV_H
  56
  57 #define WLAN_IEEE_OUI_LEN       3
  58
  59 #define WLAN_ETHCONV_ENCAP      1
  60 #define WLAN_ETHCONV_8021h      3
  61
  62 #define P80211CAPTURE_VERSION   0x80211001
  63
  64 #define P80211_FRMMETA_MAGIC    0x802110
  65
  66 struct p80211_rxmeta {
  67         struct wlandevice *wlandev;
  68
  69         u64 mactime;            /* Hi-rez MAC-supplied time value */
  70         u64 hosttime;           /* Best-rez host supplied time value */
  71
  72         unsigned int rxrate;    /* Receive data rate in 100kbps */
  73         unsigned int priority;  /* 0-15, 0=contention, 6=CF */
  74         int signal;             /* An SSI, see p80211netdev.h */
  75         int noise;              /* An SSI, see p80211netdev.h */
  76         unsigned int channel;   /* Receive channel (mostly for snifs) */
  77         unsigned int preamble;  /* P80211ENUM_preambletype_* */
  78         unsigned int encoding;  /* P80211ENUM_encoding_* */
  79
  80 };
  81
  82 struct p80211_frmmeta {
  83         unsigned int magic;
  84         struct p80211_rxmeta *rx;
  85 };
  86
  87 void p80211skb_free(struct wlandevice *wlandev, struct sk_buff *skb);
  88 int p80211skb_rxmeta_attach(struct wlandevice *wlandev, struct sk_buff *skb);
  89 void p80211skb_rxmeta_detach(struct sk_buff *skb);
  90
  91 static inline struct p80211_frmmeta *p80211skb_frmmeta(struct sk_buff *skb)
  92 {
  93         struct p80211_frmmeta *frmmeta = (struct p80211_frmmeta *)skb->cb;
  94
  95         return frmmeta->magic == P80211_FRMMETA_MAGIC ? frmmeta : NULL;
  96 }
  97
  98 static inline struct p80211_rxmeta *p80211skb_rxmeta(struct sk_buff *skb)
  99 {
 100         struct p80211_frmmeta *frmmeta = p80211skb_frmmeta(skb);
 101
 102         return frmmeta ? frmmeta->rx : NULL;
 103 }
 104
 105 /*
 106  * Frame capture header.  (See doc/capturefrm.txt)
 107  */
 108 struct p80211_caphdr {
 109         __be32 version;
 110         __be32 length;
 111         __be64 mactime;
 112         __be64 hosttime;
 113         __be32 phytype;
 114         __be32 channel;
 115         __be32 datarate;
 116         __be32 antenna;
 117         __be32 priority;
 118         __be32 ssi_type;
 119         __be32 ssi_signal;
 120         __be32 ssi_noise;
 121         __be32 preamble;
 122         __be32 encoding;
 123 };
 124
 125 /* buffer free method pointer type */
 126 typedef void (*freebuf_method_t) (void *buf, int size);
 127
 128 struct p80211_metawep {
 129         void *data;
 130         u8 iv[4];
 131         u8 icv[4];
 132 };
 133
 134 /* local ether header type */
 135 struct wlan_ethhdr {
 136         u8 daddr[ETH_ALEN];
 137         u8 saddr[ETH_ALEN];
 138         __be16 type;
 139 } __packed;
 140
 141 /* local llc header type */
 142 struct wlan_llc {
 143         u8 dsap;
 144         u8 ssap;
 145         u8 ctl;
 146 } __packed;
 147
 148 /* local snap header type */
 149 struct wlan_snap {
 150         u8 oui[WLAN_IEEE_OUI_LEN];
 151         __be16 type;
 152 } __packed;
 153
 154 /* Circular include trick */
 155 struct wlandevice;
 156
 157 int skb_p80211_to_ether(struct wlandevice *wlandev, u32 ethconv,
 158                         struct sk_buff *skb);
 159 int skb_ether_to_p80211(struct wlandevice *wlandev, u32 ethconv,
 160                         struct sk_buff *skb, union p80211_hdr *p80211_hdr,
 161                         struct p80211_metawep *p80211_wep);
 162
 163 int p80211_stt_findproto(u16 proto);
 164
 165 #endif