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/* SPDX-License-Identifier: (GPL-2.0 OR MPL-1.1) */
/*
*
* Ether/802.11 conversions and packet buffer routines
*
* Copyright (C) 1999 AbsoluteValue Systems, Inc. All Rights Reserved.
* --------------------------------------------------------------------
*
* linux-wlan
*
* --------------------------------------------------------------------
*
* 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
#define WLAN_IEEE_OUI_LEN 3
#define WLAN_ETHCONV_ENCAP 1
#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;
};
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 {
u8 oui[WLAN_IEEE_OUI_LEN];
__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, struct p80211_hdr *p80211_hdr,
struct p80211_metawep *p80211_wep);
int p80211_stt_findproto(u16 proto);
#endif
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