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 
78 struct 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 
94 struct p80211_frmmeta {
95 	unsigned int magic;
96 	struct p80211_rxmeta *rx;
97 };
98 
99 void p80211skb_free(struct wlandevice *wlandev, struct sk_buff *skb);
100 int p80211skb_rxmeta_attach(struct wlandevice *wlandev, struct sk_buff *skb);
101 void p80211skb_rxmeta_detach(struct sk_buff *skb);
102 
103 /*
104  * Frame capture header.  (See doc/capturefrm.txt)
105  */
106 struct 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 */
124 typedef void (*freebuf_method_t) (void *buf, int size);
125 
126 struct p80211_metawep {
127 	void *data;
128 	u8 iv[4];
129 	u8 icv[4];
130 };
131 
132 /* local ether header type */
133 struct 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 */
140 struct wlan_llc {
141 	u8 dsap;
142 	u8 ssap;
143 	u8 ctl;
144 } __packed;
145 
146 /* local snap header type */
147 struct wlan_snap {
148 	u8 oui[WLAN_IEEE_OUI_LEN];
149 	u16 type;
150 } __packed;
151 
152 /* Circular include trick */
153 struct wlandevice;
154 
155 int skb_p80211_to_ether(struct wlandevice *wlandev, u32 ethconv,
156 			struct sk_buff *skb);
157 int 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 
161 int p80211_stt_findproto(u16 proto);
162 
163 #endif
164