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_IEEE_OUI_LEN	3
57 
58 #define WLAN_ETHCONV_ENCAP	1
59 #define WLAN_ETHCONV_8021h	3
60 
61 #define P80211CAPTURE_VERSION	0x80211001
62 
63 #define	P80211_FRMMETA_MAGIC	0x802110
64 
65 #define P80211SKB_FRMMETA(s) \
66 	(((((struct p80211_frmmeta *)((s)->cb))->magic) == \
67 		P80211_FRMMETA_MAGIC) ? \
68 		((struct p80211_frmmeta *)((s)->cb)) : \
69 		(NULL))
70 
71 #define P80211SKB_RXMETA(s) \
72 	(P80211SKB_FRMMETA((s)) ?  P80211SKB_FRMMETA((s))->rx : \
73 		((struct p80211_rxmeta *)(NULL)))
74 
75 struct p80211_rxmeta {
76 	struct wlandevice *wlandev;
77 
78 	u64 mactime;		/* Hi-rez MAC-supplied time value */
79 	u64 hosttime;		/* Best-rez host supplied time value */
80 
81 	unsigned int rxrate;	/* Receive data rate in 100kbps */
82 	unsigned int priority;	/* 0-15, 0=contention, 6=CF */
83 	int signal;		/* An SSI, see p80211netdev.h */
84 	int noise;		/* An SSI, see p80211netdev.h */
85 	unsigned int channel;	/* Receive channel (mostly for snifs) */
86 	unsigned int preamble;	/* P80211ENUM_preambletype_* */
87 	unsigned int encoding;	/* P80211ENUM_encoding_* */
88 
89 };
90 
91 struct p80211_frmmeta {
92 	unsigned int magic;
93 	struct p80211_rxmeta *rx;
94 };
95 
96 void p80211skb_free(struct wlandevice *wlandev, struct sk_buff *skb);
97 int p80211skb_rxmeta_attach(struct wlandevice *wlandev, struct sk_buff *skb);
98 void p80211skb_rxmeta_detach(struct sk_buff *skb);
99 
100 /*
101  * Frame capture header.  (See doc/capturefrm.txt)
102  */
103 struct p80211_caphdr {
104 	__be32 version;
105 	__be32 length;
106 	__be64 mactime;
107 	__be64 hosttime;
108 	__be32 phytype;
109 	__be32 channel;
110 	__be32 datarate;
111 	__be32 antenna;
112 	__be32 priority;
113 	__be32 ssi_type;
114 	__be32 ssi_signal;
115 	__be32 ssi_noise;
116 	__be32 preamble;
117 	__be32 encoding;
118 };
119 
120 /* buffer free method pointer type */
121 typedef void (*freebuf_method_t) (void *buf, int size);
122 
123 struct p80211_metawep {
124 	void *data;
125 	u8 iv[4];
126 	u8 icv[4];
127 };
128 
129 /* local ether header type */
130 struct wlan_ethhdr {
131 	u8 daddr[ETH_ALEN];
132 	u8 saddr[ETH_ALEN];
133 	__be16 type;
134 } __packed;
135 
136 /* local llc header type */
137 struct wlan_llc {
138 	u8 dsap;
139 	u8 ssap;
140 	u8 ctl;
141 } __packed;
142 
143 /* local snap header type */
144 struct wlan_snap {
145 	u8 oui[WLAN_IEEE_OUI_LEN];
146 	__be16 type;
147 } __packed;
148 
149 /* Circular include trick */
150 struct wlandevice;
151 
152 int skb_p80211_to_ether(struct wlandevice *wlandev, u32 ethconv,
153 			struct sk_buff *skb);
154 int skb_ether_to_p80211(struct wlandevice *wlandev, u32 ethconv,
155 			struct sk_buff *skb, union p80211_hdr *p80211_hdr,
156 			struct p80211_metawep *p80211_wep);
157 
158 int p80211_stt_findproto(u16 proto);
159 
160 #endif
161