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 * $FreeBSD$ 26 */ 27 #ifndef _FBSD_COMPAT_NET80211_IEEE80211_INPUT_H_ 28 #define _FBSD_COMPAT_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 istdmaoui(const uint8_t *frm) 129 { 130 return frm[1] > 3 && LE_READ_4(frm+2) == ((TDMA_OUI_TYPE<<24)|TDMA_OUI); 131 } 132 133 static __inline int 134 ishtcapoui(const uint8_t *frm) 135 { 136 return frm[1] > 3 && LE_READ_4(frm+2) == ((BCM_OUI_HTCAP<<24)|BCM_OUI); 137 } 138 139 static __inline int 140 ishtinfooui(const uint8_t *frm) 141 { 142 return frm[1] > 3 && LE_READ_4(frm+2) == ((BCM_OUI_HTINFO<<24)|BCM_OUI); 143 } 144 145 void ieee80211_deliver_data(struct ieee80211vap *, 146 struct ieee80211_node *, struct mbuf *); 147 struct mbuf *ieee80211_defrag(struct ieee80211_node *, 148 struct mbuf *, int); 149 struct mbuf *ieee80211_realign(struct ieee80211vap *, struct mbuf *, size_t); 150 struct mbuf *ieee80211_decap(struct ieee80211vap *, struct mbuf *, int); 151 struct mbuf *ieee80211_decap1(struct mbuf *, int *); 152 int ieee80211_setup_rates(struct ieee80211_node *ni, 153 const uint8_t *rates, const uint8_t *xrates, int flags); 154 void ieee80211_send_error(struct ieee80211_node *, 155 const uint8_t mac[IEEE80211_ADDR_LEN], int subtype, int arg); 156 int ieee80211_alloc_challenge(struct ieee80211_node *); 157 int ieee80211_parse_beacon(struct ieee80211_node *, struct mbuf *, 158 struct ieee80211_scanparams *); 159 int ieee80211_parse_action(struct ieee80211_node *, struct mbuf *); 160 #endif /* _FBSD_COMPAT_NET80211_IEEE80211_INPUT_H_ */ 161