Root/drivers/staging/wlan-ng/p80211conv.h

1/* p80211conv.h
2*
3* Ether/802.11 conversions and packet buffer routines
4*
5* Copyright (C) 1999 AbsoluteValue Systems, Inc. All Rights Reserved.
6* --------------------------------------------------------------------
7*
8* linux-wlan
9*
10* The contents of this file are subject to the Mozilla Public
11* License Version 1.1 (the "License"); you may not use this file
12* except in compliance with the License. You may obtain a copy of
13* the License at http://www.mozilla.org/MPL/
14*
15* Software distributed under the License is distributed on an "AS
16* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
17* implied. See the License for the specific language governing
18* rights and limitations under the License.
19*
20* Alternatively, the contents of this file may be used under the
21* terms of the GNU Public License version 2 (the "GPL"), in which
22* case the provisions of the GPL are applicable instead of the
23* above. If you wish to allow the use of your version of this file
24* only under the terms of the GPL and not to allow others to use
25* your version of this file under the MPL, indicate your decision
26* by deleting the provisions above and replace them with the notice
27* and other provisions required by the GPL. If you do not delete
28* the provisions above, a recipient may use your version of this
29* file under either the MPL or the GPL.
30*
31* --------------------------------------------------------------------
32*
33* Inquiries regarding the linux-wlan Open Source project can be
34* made directly to:
35*
36* AbsoluteValue Systems Inc.
37* info@linux-wlan.com
38* http://www.linux-wlan.com
39*
40* --------------------------------------------------------------------
41*
42* Portions of the development of this software were funded by
43* Intersil Corporation as part of PRISM(R) chipset product development.
44*
45* --------------------------------------------------------------------
46*
47* This file declares the functions, types and macros that perform
48* Ethernet to/from 802.11 frame conversions.
49*
50* --------------------------------------------------------------------
51*/
52
53#ifndef _LINUX_P80211CONV_H
54#define _LINUX_P80211CONV_H
55
56#define WLAN_ETHADDR_LEN 6
57#define WLAN_IEEE_OUI_LEN 3
58
59#define WLAN_ETHCONV_ENCAP 1
60#define WLAN_ETHCONV_8021h 3
61
62#define WLAN_ETHHDR_LEN 14
63
64#define P80211CAPTURE_VERSION 0x80211001
65
66#define P80211_FRMMETA_MAGIC 0x802110
67
68#define P80211SKB_FRMMETA(s) \
69    (((((struct p80211_frmmeta *)((s)->cb))->magic) == \
70        P80211_FRMMETA_MAGIC) ? \
71        ((struct p80211_frmmeta *)((s)->cb)) : \
72        (NULL))
73
74#define P80211SKB_RXMETA(s) \
75    (P80211SKB_FRMMETA((s)) ? P80211SKB_FRMMETA((s))->rx : \
76        ((struct p80211_rxmeta *)(NULL)))
77
78struct p80211_rxmeta {
79    struct wlandevice *wlandev;
80
81    u64 mactime; /* Hi-rez MAC-supplied time value */
82    u64 hosttime; /* Best-rez host supplied time value */
83
84    unsigned int rxrate; /* Receive data rate in 100kbps */
85    unsigned int priority; /* 0-15, 0=contention, 6=CF */
86    int signal; /* An SSI, see p80211netdev.h */
87    int noise; /* An SSI, see p80211netdev.h */
88    unsigned int channel; /* Receive channel (mostly for snifs) */
89    unsigned int preamble; /* P80211ENUM_preambletype_* */
90    unsigned int encoding; /* P80211ENUM_encoding_* */
91
92};
93
94struct p80211_frmmeta {
95    unsigned int magic;
96    struct p80211_rxmeta *rx;
97};
98
99void p80211skb_free(struct wlandevice *wlandev, struct sk_buff *skb);
100int p80211skb_rxmeta_attach(struct wlandevice *wlandev, struct sk_buff *skb);
101void p80211skb_rxmeta_detach(struct sk_buff *skb);
102
103/*
104 * Frame capture header. (See doc/capturefrm.txt)
105 */
106struct p80211_caphdr {
107    u32 version;
108    u32 length;
109    u64 mactime;
110    u64 hosttime;
111    u32 phytype;
112    u32 channel;
113    u32 datarate;
114    u32 antenna;
115    u32 priority;
116    u32 ssi_type;
117    s32 ssi_signal;
118    s32 ssi_noise;
119    u32 preamble;
120    u32 encoding;
121};
122
123/* buffer free method pointer type */
124typedef void (*freebuf_method_t) (void *buf, int size);
125
126struct p80211_metawep {
127    void *data;
128    u8 iv[4];
129    u8 icv[4];
130};
131
132/* local ether header type */
133struct wlan_ethhdr {
134    u8 daddr[WLAN_ETHADDR_LEN];
135    u8 saddr[WLAN_ETHADDR_LEN];
136    u16 type;
137} __packed;
138
139/* local llc header type */
140struct wlan_llc {
141    u8 dsap;
142    u8 ssap;
143    u8 ctl;
144} __packed;
145
146/* local snap header type */
147struct wlan_snap {
148    u8 oui[WLAN_IEEE_OUI_LEN];
149    u16 type;
150} __packed;
151
152/* Circular include trick */
153struct wlandevice;
154
155int skb_p80211_to_ether(struct wlandevice *wlandev, u32 ethconv,
156            struct sk_buff *skb);
157int skb_ether_to_p80211(struct wlandevice *wlandev, u32 ethconv,
158            struct sk_buff *skb, union p80211_hdr *p80211_hdr,
159            struct p80211_metawep *p80211_wep);
160
161int p80211_stt_findproto(u16 proto);
162
163#endif
164

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