1 /*-
2 * Copyright (c) 2007-2008 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: src/sys/net80211/ieee80211_input.h,v 1.1 2008/04/20 20:35:43 sam Exp $
26 */
27 #ifndef _NET80211_IEEE80211_INPUT_H_
28 #define _NET80211_IEEE80211_INPUT_H_
29
30 /* Verify the existence and length of __elem or get out. */
31 #define IEEE80211_VERIFY_ELEMENT(__elem, __maxlen, _action) do { \
32 if ((__elem) == NULL) { \
33 IEEE80211_DISCARD(vap, IEEE80211_MSG_ELEMID, \
34 wh, NULL, "%s", "no " #__elem ); \
35 vap->iv_stats.is_rx_elem_missing++; \
36 _action; \
37 } else if ((__elem)[1] > (__maxlen)) { \
38 IEEE80211_DISCARD(vap, IEEE80211_MSG_ELEMID, \
39 wh, NULL, "bad " #__elem " len %d", (__elem)[1]); \
40 vap->iv_stats.is_rx_elem_toobig++; \
41 _action; \
42 } \
43 } while (0)
44
45 #define IEEE80211_VERIFY_LENGTH(_len, _minlen, _action) do { \
46 if ((_len) < (_minlen)) { \
47 IEEE80211_DISCARD(vap, IEEE80211_MSG_ELEMID, \
48 wh, NULL, "ie too short, got %d, expected %d", \
49 (_len), (_minlen)); \
50 vap->iv_stats.is_rx_elem_toosmall++; \
51 _action; \
52 } \
53 } while (0)
54
55 #ifdef IEEE80211_DEBUG
56 void ieee80211_ssid_mismatch(struct ieee80211vap *, const char *tag,
57 uint8_t mac[IEEE80211_ADDR_LEN], uint8_t *ssid);
58
59 #define IEEE80211_VERIFY_SSID(_ni, _ssid, _action) do { \
60 if ((_ssid)[1] != 0 && \
61 ((_ssid)[1] != (_ni)->ni_esslen || \
62 memcmp((_ssid) + 2, (_ni)->ni_essid, (_ssid)[1]) != 0)) { \
63 if (ieee80211_msg_input(vap)) \
64 ieee80211_ssid_mismatch(vap, \
65 ieee80211_mgt_subtype_name[subtype >> \
66 IEEE80211_FC0_SUBTYPE_SHIFT], \
67 wh->i_addr2, _ssid); \
68 vap->iv_stats.is_rx_ssidmismatch++; \
69 _action; \
70 } \
71 } while (0)
72 #else /* !IEEE80211_DEBUG */
73 #define IEEE80211_VERIFY_SSID(_ni, _ssid, _action) do { \
74 if ((_ssid)[1] != 0 && \
75 ((_ssid)[1] != (_ni)->ni_esslen || \
76 memcmp((_ssid) + 2, (_ni)->ni_essid, (_ssid)[1]) != 0)) { \
77 vap->iv_stats.is_rx_ssidmismatch++; \
78 _action; \
79 } \
80 } while (0)
81 #endif /* !IEEE80211_DEBUG */
82
83 /* unalligned little endian access */
84 #define LE_READ_2(p) \
85 ((uint16_t) \
86 ((((const uint8_t *)(p))[0] ) | \
87 (((const uint8_t *)(p))[1] << 8)))
88 #define LE_READ_4(p) \
89 ((uint32_t) \
90 ((((const uint8_t *)(p))[0] ) | \
91 (((const uint8_t *)(p))[1] << 8) | \
92 (((const uint8_t *)(p))[2] << 16) | \
93 (((const uint8_t *)(p))[3] << 24)))
94
95 static __inline int
96 iswpaoui(const uint8_t *frm)
97 {
98 return frm[1] > 3 && LE_READ_4(frm+2) == ((WPA_OUI_TYPE<<24)|WPA_OUI);
99 }
100
101 static __inline int
102 iswmeoui(const uint8_t *frm)
103 {
104 return frm[1] > 3 && LE_READ_4(frm+2) == ((WME_OUI_TYPE<<24)|WME_OUI);
105 }
106
107 static __inline int
108 iswmeparam(const uint8_t *frm)
109 {
110 return frm[1] > 5 && LE_READ_4(frm+2) == ((WME_OUI_TYPE<<24)|WME_OUI) &&
111 frm[6] == WME_PARAM_OUI_SUBTYPE;
112 }
113
114 static __inline int
115 iswmeinfo(const uint8_t *frm)
116 {
117 return frm[1] > 5 && LE_READ_4(frm+2) == ((WME_OUI_TYPE<<24)|WME_OUI) &&
118 frm[6] == WME_INFO_OUI_SUBTYPE;
119 }
120
121 static __inline int
122 isatherosoui(const uint8_t *frm)
123 {
124 return frm[1] > 3 && LE_READ_4(frm+2) == ((ATH_OUI_TYPE<<24)|ATH_OUI);
125 }
126
127 static __inline int
128 ishtcapoui(const uint8_t *frm)
129 {
130 return frm[1] > 3 && LE_READ_4(frm+2) == ((BCM_OUI_HTCAP<<24)|BCM_OUI);
131 }
132
133 static __inline int
134 ishtinfooui(const uint8_t *frm)
135 {
136 return frm[1] > 3 && LE_READ_4(frm+2) == ((BCM_OUI_HTINFO<<24)|BCM_OUI);
137 }
138
139 void ieee80211_deliver_data(struct ieee80211vap *,
140 struct ieee80211_node *, struct mbuf *);
141 struct mbuf *ieee80211_defrag(struct ieee80211_node *,
142 struct mbuf *, int);
143 struct mbuf *ieee80211_decap(struct ieee80211vap *, struct mbuf *, int);
144 struct mbuf *ieee80211_decap1(struct mbuf *, int *);
145 struct mbuf *ieee80211_decap_fastframe(struct ieee80211_node *,
146 struct mbuf *);
147 int ieee80211_setup_rates(struct ieee80211_node *ni,
148 const uint8_t *rates, const uint8_t *xrates, int flags);
149 void ieee80211_send_error(struct ieee80211_node *,
150 const uint8_t mac[IEEE80211_ADDR_LEN], int subtype, int arg);
151 int ieee80211_alloc_challenge(struct ieee80211_node *);
152 void ieee80211_parse_ath(struct ieee80211_node *, uint8_t *);
153 int ieee80211_parse_beacon(struct ieee80211_node *, struct mbuf *,
154 struct ieee80211_scanparams *);
155 int ieee80211_parse_action(struct ieee80211_node *, struct mbuf *);
156 #endif /* _NET80211_IEEE80211_INPUT_H_ */
157
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