First pass at converting the net80211 infrastrcture from FreeBSD.
[dragonfly.git] / sys / netproto / 802_11 / ieee80211_input.h
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32176cfd
RP
1/*-
2 * Copyright (c) 2007-2009 Sam Leffler, Errno Consulting
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 *
25 * $FreeBSD: head/sys/net80211/ieee80211_input.h 195757 2009-07-18 20:19:53Z sam $
26 * $DragonFly$
27 */
28#ifndef _NET80211_IEEE80211_INPUT_H_
29#define _NET80211_IEEE80211_INPUT_H_
30
31/* Verify the existence and length of __elem or get out. */
32#define IEEE80211_VERIFY_ELEMENT(__elem, __maxlen, _action) do { \
33 if ((__elem) == NULL) { \
34 IEEE80211_DISCARD(vap, IEEE80211_MSG_ELEMID, \
35 wh, NULL, "%s", "no " #__elem ); \
36 vap->iv_stats.is_rx_elem_missing++; \
37 _action; \
38 } else if ((__elem)[1] > (__maxlen)) { \
39 IEEE80211_DISCARD(vap, IEEE80211_MSG_ELEMID, \
40 wh, NULL, "bad " #__elem " len %d", (__elem)[1]); \
41 vap->iv_stats.is_rx_elem_toobig++; \
42 _action; \
43 } \
44} while (0)
45
46#define IEEE80211_VERIFY_LENGTH(_len, _minlen, _action) do { \
47 if ((_len) < (_minlen)) { \
48 IEEE80211_DISCARD(vap, IEEE80211_MSG_ELEMID, \
49 wh, NULL, "ie too short, got %d, expected %d", \
50 (_len), (_minlen)); \
51 vap->iv_stats.is_rx_elem_toosmall++; \
52 _action; \
53 } \
54} while (0)
55
56#ifdef IEEE80211_DEBUG
57void ieee80211_ssid_mismatch(struct ieee80211vap *, const char *tag,
58 uint8_t mac[IEEE80211_ADDR_LEN], uint8_t *ssid);
59
60#define IEEE80211_VERIFY_SSID(_ni, _ssid, _action) do { \
61 if ((_ssid)[1] != 0 && \
62 ((_ssid)[1] != (_ni)->ni_esslen || \
63 memcmp((_ssid) + 2, (_ni)->ni_essid, (_ssid)[1]) != 0)) { \
64 if (ieee80211_msg_input(vap)) \
65 ieee80211_ssid_mismatch(vap, \
66 ieee80211_mgt_subtype_name[subtype >> \
67 IEEE80211_FC0_SUBTYPE_SHIFT], \
68 wh->i_addr2, _ssid); \
69 vap->iv_stats.is_rx_ssidmismatch++; \
70 _action; \
71 } \
72} while (0)
73#else /* !IEEE80211_DEBUG */
74#define IEEE80211_VERIFY_SSID(_ni, _ssid, _action) do { \
75 if ((_ssid)[1] != 0 && \
76 ((_ssid)[1] != (_ni)->ni_esslen || \
77 memcmp((_ssid) + 2, (_ni)->ni_essid, (_ssid)[1]) != 0)) { \
78 vap->iv_stats.is_rx_ssidmismatch++; \
79 _action; \
80 } \
81} while (0)
82#endif /* !IEEE80211_DEBUG */
83
84/* unalligned little endian access */
85#define LE_READ_2(p) \
86 ((uint16_t) \
87 ((((const uint8_t *)(p))[0] ) | \
88 (((const uint8_t *)(p))[1] << 8)))
89#define LE_READ_4(p) \
90 ((uint32_t) \
91 ((((const uint8_t *)(p))[0] ) | \
92 (((const uint8_t *)(p))[1] << 8) | \
93 (((const uint8_t *)(p))[2] << 16) | \
94 (((const uint8_t *)(p))[3] << 24)))
95
96static __inline int
97iswpaoui(const uint8_t *frm)
98{
99 return frm[1] > 3 && LE_READ_4(frm+2) == ((WPA_OUI_TYPE<<24)|WPA_OUI);
100}
101
102static __inline int
103iswmeoui(const uint8_t *frm)
104{
105 return frm[1] > 3 && LE_READ_4(frm+2) == ((WME_OUI_TYPE<<24)|WME_OUI);
106}
107
108static __inline int
109iswmeparam(const uint8_t *frm)
110{
111 return frm[1] > 5 && LE_READ_4(frm+2) == ((WME_OUI_TYPE<<24)|WME_OUI) &&
112 frm[6] == WME_PARAM_OUI_SUBTYPE;
113}
114
115static __inline int
116iswmeinfo(const uint8_t *frm)
117{
118 return frm[1] > 5 && LE_READ_4(frm+2) == ((WME_OUI_TYPE<<24)|WME_OUI) &&
119 frm[6] == WME_INFO_OUI_SUBTYPE;
120}
121
122static __inline int
123isatherosoui(const uint8_t *frm)
124{
125 return frm[1] > 3 && LE_READ_4(frm+2) == ((ATH_OUI_TYPE<<24)|ATH_OUI);
126}
127
128static __inline int
129istdmaoui(const uint8_t *frm)
130{
131 return frm[1] > 3 && LE_READ_4(frm+2) == ((TDMA_OUI_TYPE<<24)|TDMA_OUI);
132}
133
134static __inline int
135ishtcapoui(const uint8_t *frm)
136{
137 return frm[1] > 3 && LE_READ_4(frm+2) == ((BCM_OUI_HTCAP<<24)|BCM_OUI);
138}
139
140static __inline int
141ishtinfooui(const uint8_t *frm)
142{
143 return frm[1] > 3 && LE_READ_4(frm+2) == ((BCM_OUI_HTINFO<<24)|BCM_OUI);
144}
145
146void ieee80211_deliver_data(struct ieee80211vap *,
147 struct ieee80211_node *, struct mbuf *);
148struct mbuf *ieee80211_defrag(struct ieee80211_node *,
149 struct mbuf *, int);
150struct mbuf *ieee80211_realign(struct ieee80211vap *, struct mbuf *, size_t);
151struct mbuf *ieee80211_decap(struct ieee80211vap *, struct mbuf *, int);
152struct mbuf *ieee80211_decap1(struct mbuf *, int *);
153int ieee80211_setup_rates(struct ieee80211_node *ni,
154 const uint8_t *rates, const uint8_t *xrates, int flags);
155void ieee80211_send_error(struct ieee80211_node *,
156 const uint8_t mac[IEEE80211_ADDR_LEN], int subtype, int arg);
157int ieee80211_alloc_challenge(struct ieee80211_node *);
158int ieee80211_parse_beacon(struct ieee80211_node *, struct mbuf *,
159 struct ieee80211_scanparams *);
160int ieee80211_parse_action(struct ieee80211_node *, struct mbuf *);
161#endif /* _NET80211_IEEE80211_INPUT_H_ */