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 %jd, expected %jd", \ 50 (intmax_t)(_len), (intmax_t)(_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_ */ 163