p80211conv.h

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/* src/include/wlan/p80211conv.h
*
* Ether/802.11 conversions and packet buffer routines
*
* 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 functions, types and macros that perform 
* Ethernet to/from 802.11 frame conversions.  
*
* --------------------------------------------------------------------
*/

#ifndef _LINUX_P80211CONV_H
#define _LINUX_P80211CONV_H

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

#define WLAN_ETHADDR_LEN        6
#define WLAN_IEEE_OUI_LEN       3

#define WLAN_ETHCONV_ENCAP      1
#define WLAN_ETHCONV_RFC1042    2
#define WLAN_ETHCONV_8021h      3

#define WLAN_MIN_ETHFRM_LEN     60
#define WLAN_MAX_ETHFRM_LEN     1514
#define WLAN_ETHHDR_LEN         14

#define P80211CAPTURE_VERSION   0x80211001

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

#define P80211_FRMMETA_MAGIC            0x802110

#define P80211SKB_FRMMETA(s) \
        (((((p80211_frmmeta_t*)((s)->cb))->magic)==P80211_FRMMETA_MAGIC) ? \
                ((p80211_frmmeta_t*)((s)->cb)) : \
                (NULL))

#define P80211SKB_RXMETA(s) \
        (P80211SKB_FRMMETA((s)) ?  P80211SKB_FRMMETA((s))->rx : ((p80211_rxmeta_t*)(NULL)))

typedef struct p80211_rxmeta
{
        struct wlandevice       *wlandev;

        UINT64  mactime;        /* Hi-rez MAC-supplied time value */
        UINT64  hosttime;       /* Best-rez host supplied time value */

        UINT    rxrate;         /* Receive data rate in 100kbps */
        UINT    priority;       /* 0-15, 0=contention, 6=CF */
        INT     signal;         /* An SSI, see p80211netdev.h */
        INT     noise;          /* An SSI, see p80211netdev.h */
        UINT    channel;        /* Receive channel (mostly for snifs) */
        UINT    preamble;       /* P80211ENUM_preambletype_* */
        UINT    encoding;       /* P80211ENUM_encoding_* */

} p80211_rxmeta_t;

typedef struct p80211_frmmeta
{
        UINT                    magic;
        p80211_rxmeta_t         *rx;
} p80211_frmmeta_t;

void p80211skb_free(struct wlandevice *wlandev, struct sk_buff *skb);
int p80211skb_rxmeta_attach(struct wlandevice *wlandev, struct sk_buff *skb);
void p80211skb_rxmeta_detach(struct sk_buff *skb);

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

/*
 * Frame capture header.  (See doc/capturefrm.txt)
 */
typedef struct p80211_caphdr
{
        UINT32          version         __WLAN_ATTRIB_PACK__;
        UINT32          length          __WLAN_ATTRIB_PACK__;
        UINT64          mactime         __WLAN_ATTRIB_PACK__;
        UINT64          hosttime        __WLAN_ATTRIB_PACK__;
        UINT32          phytype         __WLAN_ATTRIB_PACK__;
        UINT32          channel         __WLAN_ATTRIB_PACK__;
        UINT32          datarate        __WLAN_ATTRIB_PACK__;
        UINT32          antenna         __WLAN_ATTRIB_PACK__;
        UINT32          priority        __WLAN_ATTRIB_PACK__;
        UINT32          ssi_type        __WLAN_ATTRIB_PACK__;
        INT32           ssi_signal      __WLAN_ATTRIB_PACK__;
        INT32           ssi_noise       __WLAN_ATTRIB_PACK__;
        UINT32          preamble        __WLAN_ATTRIB_PACK__;
        UINT32          encoding        __WLAN_ATTRIB_PACK__;
} p80211_caphdr_t;

/* buffer free method pointer type */
typedef void (* freebuf_method_t)(void *buf, int size);

typedef struct p80211_metawep {
        void  *data;
        UINT8 iv[4];
        UINT8 icv[4];
} p80211_metawep_t;

/* local ether header type */
typedef struct wlan_ethhdr
{
        UINT8   daddr[WLAN_ETHADDR_LEN]         __WLAN_ATTRIB_PACK__;
        UINT8   saddr[WLAN_ETHADDR_LEN]         __WLAN_ATTRIB_PACK__;
        UINT16  type                            __WLAN_ATTRIB_PACK__;
} __WLAN_ATTRIB_PACK__ wlan_ethhdr_t;

/* local llc header type */
typedef struct wlan_llc
{
        UINT8   dsap                            __WLAN_ATTRIB_PACK__;
        UINT8   ssap                            __WLAN_ATTRIB_PACK__;
        UINT8   ctl                             __WLAN_ATTRIB_PACK__;
} __WLAN_ATTRIB_PACK__ wlan_llc_t;

/* local snap header type */
typedef struct wlan_snap
{
        UINT8   oui[WLAN_IEEE_OUI_LEN]          __WLAN_ATTRIB_PACK__;
        UINT16  type                            __WLAN_ATTRIB_PACK__;
} __WLAN_ATTRIB_PACK__ wlan_snap_t;

/* Circular include trick */
struct wlandevice;

/*================================================================*/
/* Externs */

/*================================================================*/
/*Function Declarations */

int skb_p80211_to_ether( struct wlandevice *wlandev, UINT32 ethconv, 
                         struct sk_buff *skb);
int skb_ether_to_p80211( struct wlandevice *wlandev, UINT32 ethconv,
                         struct sk_buff *skb, p80211_hdr_t *p80211_hdr,
                         p80211_metawep_t *p80211_wep );

int p80211_stt_findproto(UINT16 proto);
int p80211_stt_addproto(UINT16 proto);

#endif

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