1 /* SPDX-License-Identifier: (GPL-2.0 OR MPL-1.1) */
2 /* p80211conv.h
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 * The contents of this file are subject to the Mozilla Public
12 * License Version 1.1 (the "License"); you may not use this file
13 * except in compliance with the License. You may obtain a copy of
14 * the License at http://www.mozilla.org/MPL/
15 *
16 * Software distributed under the License is distributed on an "AS
17 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
18 * implied. See the License for the specific language governing
19 * rights and limitations under the License.
20 *
21 * Alternatively, the contents of this file may be used under the
22 * terms of the GNU Public License version 2 (the "GPL"), in which
23 * case the provisions of the GPL are applicable instead of the
24 * above. If you wish to allow the use of your version of this file
25 * only under the terms of the GPL and not to allow others to use
26 * your version of this file under the MPL, indicate your decision
27 * by deleting the provisions above and replace them with the notice
28 * and other provisions required by the GPL. If you do not delete
29 * the provisions above, a recipient may use your version of this
30 * file under either the MPL or the GPL.
31 *
32 * --------------------------------------------------------------------
33 *
34 * Inquiries regarding the linux-wlan Open Source project can be
35 * made directly to:
36 *
37 * AbsoluteValue Systems Inc.
38 * info@linux-wlan.com
39 * http://www.linux-wlan.com
40 *
41 * --------------------------------------------------------------------
42 *
43 * Portions of the development of this software were funded by
44 * Intersil Corporation as part of PRISM(R) chipset product development.
45 *
46 * --------------------------------------------------------------------
47 *
48 * This file declares the functions, types and macros that perform
49 * Ethernet to/from 802.11 frame conversions.
50 *
51 * --------------------------------------------------------------------
52 */
53
54 #ifndef _LINUX_P80211CONV_H
55 #define _LINUX_P80211CONV_H
56
57 #define WLAN_IEEE_OUI_LEN 3
58
59 #define WLAN_ETHCONV_ENCAP 1
60 #define WLAN_ETHCONV_8021h 3
61
62 #define P80211CAPTURE_VERSION 0x80211001
63
64 #define P80211_FRMMETA_MAGIC 0x802110
65
66 struct p80211_rxmeta {
67 struct wlandevice *wlandev;
68
69 u64 mactime; /* Hi-rez MAC-supplied time value */
70 u64 hosttime; /* Best-rez host supplied time value */
71
72 unsigned int rxrate; /* Receive data rate in 100kbps */
73 unsigned int priority; /* 0-15, 0=contention, 6=CF */
74 int signal; /* An SSI, see p80211netdev.h */
75 int noise; /* An SSI, see p80211netdev.h */
76 unsigned int channel; /* Receive channel (mostly for snifs) */
77 unsigned int preamble; /* P80211ENUM_preambletype_* */
78 unsigned int encoding; /* P80211ENUM_encoding_* */
79
80 };
81
82 struct p80211_frmmeta {
83 unsigned int magic;
84 struct p80211_rxmeta *rx;
85 };
86
87 void p80211skb_free(struct wlandevice *wlandev, struct sk_buff *skb);
88 int p80211skb_rxmeta_attach(struct wlandevice *wlandev, struct sk_buff *skb);
89 void p80211skb_rxmeta_detach(struct sk_buff *skb);
90
91 static inline struct p80211_frmmeta *p80211skb_frmmeta(struct sk_buff *skb)
92 {
93 struct p80211_frmmeta *frmmeta = (struct p80211_frmmeta *)skb->cb;
94
95 return frmmeta->magic == P80211_FRMMETA_MAGIC ? frmmeta : NULL;
96 }
97
98 static inline struct p80211_rxmeta *p80211skb_rxmeta(struct sk_buff *skb)
99 {
100 struct p80211_frmmeta *frmmeta = p80211skb_frmmeta(skb);
101
102 return frmmeta ? frmmeta->rx : NULL;
103 }
104
105 /*
106 * Frame capture header. (See doc/capturefrm.txt)
107 */
108 struct p80211_caphdr {
109 __be32 version;
110 __be32 length;
111 __be64 mactime;
112 __be64 hosttime;
113 __be32 phytype;
114 __be32 channel;
115 __be32 datarate;
116 __be32 antenna;
117 __be32 priority;
118 __be32 ssi_type;
119 __be32 ssi_signal;
120 __be32 ssi_noise;
121 __be32 preamble;
122 __be32 encoding;
123 };
124
125 /* buffer free method pointer type */
126 typedef void (*freebuf_method_t) (void *buf, int size);
127
128 struct p80211_metawep {
129 void *data;
130 u8 iv[4];
131 u8 icv[4];
132 };
133
134 /* local ether header type */
135 struct wlan_ethhdr {
136 u8 daddr[ETH_ALEN];
137 u8 saddr[ETH_ALEN];
138 __be16 type;
139 } __packed;
140
141 /* local llc header type */
142 struct wlan_llc {
143 u8 dsap;
144 u8 ssap;
145 u8 ctl;
146 } __packed;
147
148 /* local snap header type */
149 struct wlan_snap {
150 u8 oui[WLAN_IEEE_OUI_LEN];
151 __be16 type;
152 } __packed;
153
154 /* Circular include trick */
155 struct wlandevice;
156
157 int skb_p80211_to_ether(struct wlandevice *wlandev, u32 ethconv,
158 struct sk_buff *skb);
159 int skb_ether_to_p80211(struct wlandevice *wlandev, u32 ethconv,
160 struct sk_buff *skb, union p80211_hdr *p80211_hdr,
161 struct p80211_metawep *p80211_wep);
162
163 int p80211_stt_findproto(u16 proto);
164
165 #endif