1/* SPDX-License-Identifier: (GPL-2.0 OR MPL-1.1) */
2/*
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 * --------------------------------------------------------------------
12 *
13 * Inquiries regarding the linux-wlan Open Source project can be
14 * made directly to:
15 *
16 * AbsoluteValue Systems Inc.
17 * info@linux-wlan.com
18 * http://www.linux-wlan.com
19 *
20 * --------------------------------------------------------------------
21 *
22 * Portions of the development of this software were funded by
23 * Intersil Corporation as part of PRISM(R) chipset product development.
24 *
25 * --------------------------------------------------------------------
26 *
27 * This file declares the functions, types and macros that perform
28 * Ethernet to/from 802.11 frame conversions.
29 *
30 * --------------------------------------------------------------------
31 */
32
33#ifndef _LINUX_P80211CONV_H
34#define _LINUX_P80211CONV_H
35
36#define WLAN_IEEE_OUI_LEN	3
37
38#define WLAN_ETHCONV_ENCAP	1
39#define WLAN_ETHCONV_8021h	3
40
41#define P80211CAPTURE_VERSION	0x80211001
42
43#define	P80211_FRMMETA_MAGIC	0x802110
44
45struct p80211_rxmeta {
46	struct wlandevice *wlandev;
47
48	u64 mactime;		/* Hi-rez MAC-supplied time value */
49	u64 hosttime;		/* Best-rez host supplied time value */
50
51	unsigned int rxrate;	/* Receive data rate in 100kbps */
52	unsigned int priority;	/* 0-15, 0=contention, 6=CF */
53	int signal;		/* An SSI, see p80211netdev.h */
54	int noise;		/* An SSI, see p80211netdev.h */
55	unsigned int channel;	/* Receive channel (mostly for snifs) */
56	unsigned int preamble;	/* P80211ENUM_preambletype_* */
57	unsigned int encoding;	/* P80211ENUM_encoding_* */
58
59};
60
61struct p80211_frmmeta {
62	unsigned int magic;
63	struct p80211_rxmeta *rx;
64};
65
66void p80211skb_free(struct wlandevice *wlandev, struct sk_buff *skb);
67int p80211skb_rxmeta_attach(struct wlandevice *wlandev, struct sk_buff *skb);
68void p80211skb_rxmeta_detach(struct sk_buff *skb);
69
70static inline struct p80211_frmmeta *p80211skb_frmmeta(struct sk_buff *skb)
71{
72	struct p80211_frmmeta *frmmeta = (struct p80211_frmmeta *)skb->cb;
73
74	return frmmeta->magic == P80211_FRMMETA_MAGIC ? frmmeta : NULL;
75}
76
77static inline struct p80211_rxmeta *p80211skb_rxmeta(struct sk_buff *skb)
78{
79	struct p80211_frmmeta *frmmeta = p80211skb_frmmeta(skb);
80
81	return frmmeta ? frmmeta->rx : NULL;
82}
83
84/*
85 * Frame capture header.  (See doc/capturefrm.txt)
86 */
87struct p80211_caphdr {
88	__be32 version;
89	__be32 length;
90	__be64 mactime;
91	__be64 hosttime;
92	__be32 phytype;
93	__be32 channel;
94	__be32 datarate;
95	__be32 antenna;
96	__be32 priority;
97	__be32 ssi_type;
98	__be32 ssi_signal;
99	__be32 ssi_noise;
100	__be32 preamble;
101	__be32 encoding;
102};
103
104struct p80211_metawep {
105	void *data;
106	u8 iv[4];
107	u8 icv[4];
108};
109
110/* local ether header type */
111struct wlan_ethhdr {
112	u8 daddr[ETH_ALEN];
113	u8 saddr[ETH_ALEN];
114	__be16 type;
115} __packed;
116
117/* local llc header type */
118struct wlan_llc {
119	u8 dsap;
120	u8 ssap;
121	u8 ctl;
122} __packed;
123
124/* local snap header type */
125struct wlan_snap {
126	u8 oui[WLAN_IEEE_OUI_LEN];
127	__be16 type;
128} __packed;
129
130/* Circular include trick */
131struct wlandevice;
132
133int skb_p80211_to_ether(struct wlandevice *wlandev, u32 ethconv,
134			struct sk_buff *skb);
135int skb_ether_to_p80211(struct wlandevice *wlandev, u32 ethconv,
136			struct sk_buff *skb, struct p80211_hdr *p80211_hdr,
137			struct p80211_metawep *p80211_wep);
138
139int p80211_stt_findproto(u16 proto);
140
141#endif
142