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/* SPDX-License-Identifier: (GPL-2.0 OR MPL-1.1) */
/* 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
* 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.
* --------------------------------------------------------------------
* 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
#define WLAN_ETHCONV_8021h 3
#define P80211CAPTURE_VERSION 0x80211001
#define P80211_FRMMETA_MAGIC 0x802110
struct p80211_rxmeta {
struct wlandevice *wlandev;
u64 mactime; /* Hi-rez MAC-supplied time value */
u64 hosttime; /* Best-rez host supplied time value */
unsigned int rxrate; /* Receive data rate in 100kbps */
unsigned int priority; /* 0-15, 0=contention, 6=CF */
int signal; /* An SSI, see p80211netdev.h */
int noise; /* An SSI, see p80211netdev.h */
unsigned int channel; /* Receive channel (mostly for snifs) */
unsigned int preamble; /* P80211ENUM_preambletype_* */
unsigned int encoding; /* P80211ENUM_encoding_* */
struct p80211_frmmeta {
unsigned int magic;
struct p80211_rxmeta *rx;
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);
static inline struct p80211_frmmeta *p80211skb_frmmeta(struct sk_buff *skb)
struct p80211_frmmeta *frmmeta = (struct p80211_frmmeta *)skb->cb;
return frmmeta->magic == P80211_FRMMETA_MAGIC ? frmmeta : NULL;
static inline struct p80211_rxmeta *p80211skb_rxmeta(struct sk_buff *skb)
struct p80211_frmmeta *frmmeta = p80211skb_frmmeta(skb);
return frmmeta ? frmmeta->rx : NULL;
* Frame capture header. (See doc/capturefrm.txt)
struct p80211_caphdr {
__be32 version;
__be32 length;
__be64 mactime;
__be64 hosttime;
__be32 phytype;
__be32 channel;
__be32 datarate;
__be32 antenna;
__be32 priority;
__be32 ssi_type;
__be32 ssi_signal;
__be32 ssi_noise;
__be32 preamble;
__be32 encoding;
/* buffer free method pointer type */
typedef void (*freebuf_method_t) (void *buf, int size);
struct p80211_metawep {
void *data;
u8 iv[4];
u8 icv[4];
/* local ether header type */
struct wlan_ethhdr {
u8 daddr[ETH_ALEN];
u8 saddr[ETH_ALEN];
__be16 type;
} __packed;
/* local llc header type */
struct wlan_llc {
u8 dsap;
u8 ssap;
u8 ctl;
} __packed;
/* local snap header type */
struct wlan_snap {
__be16 type;
} __packed;
/* Circular include trick */
struct wlandevice;
int skb_p80211_to_ether(struct wlandevice *wlandev, u32 ethconv,
struct sk_buff *skb);
int skb_ether_to_p80211(struct wlandevice *wlandev, u32 ethconv,
struct sk_buff *skb, union p80211_hdr *p80211_hdr,
struct p80211_metawep *p80211_wep);
int p80211_stt_findproto(u16 proto);