sys/netproto/802_11/ieee80211_input.h

   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 void    ieee80211_ssid_mismatch(struct ieee80211vap *, const char *tag,
  57         uint8_t mac[IEEE80211_ADDR_LEN], uint8_t *ssid);
  58
  59 #ifdef IEEE80211_DEBUG
  60
  61 #define IEEE80211_VERIFY_SSID(_ni, _ssid, _action) do {                 \
  62         if ((_ssid)[1] != 0 &&                                          \
  63             ((_ssid)[1] != (_ni)->ni_esslen ||                          \
  64             memcmp((_ssid) + 2, (_ni)->ni_essid, (_ssid)[1]) != 0)) {   \
  65                 if (ieee80211_msg_input(vap))                           \
  66                         ieee80211_ssid_mismatch(vap,                    \
  67                             ieee80211_mgt_subtype_name[subtype >>       \
  68                                 IEEE80211_FC0_SUBTYPE_SHIFT],           \
  69                                 wh->i_addr2, _ssid);                    \
  70                 vap->iv_stats.is_rx_ssidmismatch++;                     \
  71                 _action;                                                \
  72         }                                                               \
  73 } while (0)
  74 #else /* !IEEE80211_DEBUG */
  75 #define IEEE80211_VERIFY_SSID(_ni, _ssid, _action) do {                 \
  76         if ((_ssid)[1] != 0 &&                                          \
  77             ((_ssid)[1] != (_ni)->ni_esslen ||                          \
  78             memcmp((_ssid) + 2, (_ni)->ni_essid, (_ssid)[1]) != 0)) {   \
  79                 vap->iv_stats.is_rx_ssidmismatch++;                     \
  80                 _action;                                                \
  81         }                                                               \
  82 } while (0)
  83 #endif /* !IEEE80211_DEBUG */
  84
  85 /* unalligned little endian access */
  86 #define LE_READ_2(p)                                    \
  87         ((uint16_t)                                     \
  88          ((((const uint8_t *)(p))[0]      ) |           \
  89           (((const uint8_t *)(p))[1] <<  8)))
  90 #define LE_READ_4(p)                                    \
  91         ((uint32_t)                                     \
  92          ((((const uint8_t *)(p))[0]      ) |           \
  93           (((const uint8_t *)(p))[1] <<  8) |           \
  94           (((const uint8_t *)(p))[2] << 16) |           \
  95           (((const uint8_t *)(p))[3] << 24)))
  96
  97 static __inline int
  98 iswpaoui(const uint8_t *frm)
  99 {
 100         return frm[1] > 3 && LE_READ_4(frm+2) == ((WPA_OUI_TYPE<<24)|WPA_OUI);
 101 }
 102
 103 static __inline int
 104 iswmeoui(const uint8_t *frm)
 105 {
 106         return frm[1] > 3 && LE_READ_4(frm+2) == ((WME_OUI_TYPE<<24)|WME_OUI);
 107 }
 108
 109 static __inline int
 110 iswmeparam(const uint8_t *frm)
 111 {
 112         return frm[1] > 5 && LE_READ_4(frm+2) == ((WME_OUI_TYPE<<24)|WME_OUI) &&
 113                 frm[6] == WME_PARAM_OUI_SUBTYPE;
 114 }
 115
 116 static __inline int
 117 iswmeinfo(const uint8_t *frm)
 118 {
 119         return frm[1] > 5 && LE_READ_4(frm+2) == ((WME_OUI_TYPE<<24)|WME_OUI) &&
 120                 frm[6] == WME_INFO_OUI_SUBTYPE;
 121 }
 122
 123 static __inline int
 124 isatherosoui(const uint8_t *frm)
 125 {
 126         return frm[1] > 3 && LE_READ_4(frm+2) == ((ATH_OUI_TYPE<<24)|ATH_OUI);
 127 }
 128
 129 static __inline int
 130 istdmaoui(const uint8_t *frm)
 131 {
 132         return frm[1] > 3 && LE_READ_4(frm+2) == ((TDMA_OUI_TYPE<<24)|TDMA_OUI);
 133 }
 134
 135 static __inline int
 136 ishtcapoui(const uint8_t *frm)
 137 {
 138         return frm[1] > 3 && LE_READ_4(frm+2) == ((BCM_OUI_HTCAP<<24)|BCM_OUI);
 139 }
 140
 141 static __inline int
 142 ishtinfooui(const uint8_t *frm)
 143 {
 144         return frm[1] > 3 && LE_READ_4(frm+2) == ((BCM_OUI_HTINFO<<24)|BCM_OUI);
 145 }
 146
 147 void    ieee80211_deliver_data(struct ieee80211vap *,
 148                 struct ieee80211_node *, struct mbuf *);
 149 struct mbuf *ieee80211_defrag(struct ieee80211_node *,
 150                 struct mbuf *, int);
 151 struct mbuf *ieee80211_realign(struct ieee80211vap *, struct mbuf *, size_t);
 152 struct mbuf *ieee80211_decap(struct ieee80211vap *, struct mbuf *, int);
 153 struct mbuf *ieee80211_decap1(struct mbuf *, int *);
 154 int     ieee80211_setup_rates(struct ieee80211_node *ni,
 155                 const uint8_t *rates, const uint8_t *xrates, int flags);
 156 void ieee80211_send_error(struct ieee80211_node *,
 157                 const uint8_t mac[IEEE80211_ADDR_LEN], int subtype, int arg);
 158 int     ieee80211_alloc_challenge(struct ieee80211_node *);
 159 int     ieee80211_parse_beacon(struct ieee80211_node *, struct mbuf *,
 160                 struct ieee80211_scanparams *);
 161 int     ieee80211_parse_action(struct ieee80211_node *, struct mbuf *);
 162 #endif /* _NET80211_IEEE80211_INPUT_H_ */