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
45 struct 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
61 struct p80211_frmmeta {
62 unsigned int magic;
63 struct p80211_rxmeta *rx;
64 };
65
66 void p80211skb_free(struct wlandevice *wlandev, struct sk_buff *skb);
67 int p80211skb_rxmeta_attach(struct wlandevice *wlandev, struct sk_buff *skb);
68 void p80211skb_rxmeta_detach(struct sk_buff *skb);
69
p80211skb_frmmeta(struct sk_buff * skb)70 static 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
p80211skb_rxmeta(struct sk_buff * skb)77 static 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 */
87 struct 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
104 struct p80211_metawep {
105 void *data;
106 u8 iv[4];
107 u8 icv[4];
108 };
109
110 /* local ether header type */
111 struct wlan_ethhdr {
112 u8 daddr[ETH_ALEN];
113 u8 saddr[ETH_ALEN];
114 __be16 type;
115 } __packed;
116
117 /* local llc header type */
118 struct wlan_llc {
119 u8 dsap;
120 u8 ssap;
121 u8 ctl;
122 } __packed;
123
124 /* local snap header type */
125 struct wlan_snap {
126 u8 oui[WLAN_IEEE_OUI_LEN];
127 __be16 type;
128 } __packed;
129
130 /* Circular include trick */
131 struct wlandevice;
132
133 int skb_p80211_to_ether(struct wlandevice *wlandev, u32 ethconv,
134 struct sk_buff *skb);
135 int 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
139 int p80211_stt_findproto(u16 proto);
140
141 #endif
142