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 */ 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 %jd, expected %jd", \ 49 (intmax_t)(_len), (intmax_t)(_minlen)); \ 50 vap->iv_stats.is_rx_elem_toosmall++; \ 51 _action; \ 52 } \ 53 } while (0) 54 55 void ieee80211_ssid_mismatch(struct ieee80211vap *, const char *tag, 56 uint8_t mac[IEEE80211_ADDR_LEN], uint8_t *ssid); 57 58 #ifdef IEEE80211_DEBUG 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 96 static __inline int 97 iswpaoui(const uint8_t *frm) 98 { 99 return frm[1] > 3 && LE_READ_4(frm+2) == ((WPA_OUI_TYPE<<24)|WPA_OUI); 100 } 101 102 static __inline int 103 iswmeoui(const uint8_t *frm) 104 { 105 return frm[1] > 3 && LE_READ_4(frm+2) == ((WME_OUI_TYPE<<24)|WME_OUI); 106 } 107 108 static __inline int 109 iswmeparam(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 } 114 115 static __inline int 116 iswmeinfo(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 } 121 122 static __inline int 123 isatherosoui(const uint8_t *frm) 124 { 125 return frm[1] > 3 && LE_READ_4(frm+2) == ((ATH_OUI_TYPE<<24)|ATH_OUI); 126 } 127 128 static __inline int 129 istdmaoui(const uint8_t *frm) 130 { 131 return frm[1] > 3 && LE_READ_4(frm+2) == ((TDMA_OUI_TYPE<<24)|TDMA_OUI); 132 } 133 134 static __inline int 135 ishtcapoui(const uint8_t *frm) 136 { 137 return frm[1] > 3 && LE_READ_4(frm+2) == ((BCM_OUI_HTCAP<<24)|BCM_OUI); 138 } 139 140 static __inline int 141 ishtinfooui(const uint8_t *frm) 142 { 143 return frm[1] > 3 && LE_READ_4(frm+2) == ((BCM_OUI_HTINFO<<24)|BCM_OUI); 144 } 145 146 void ieee80211_deliver_data(struct ieee80211vap *, 147 struct ieee80211_node *, struct mbuf *); 148 struct mbuf *ieee80211_defrag(struct ieee80211_node *, 149 struct mbuf *, int); 150 struct mbuf *ieee80211_realign(struct ieee80211vap *, struct mbuf *, size_t); 151 struct mbuf *ieee80211_decap(struct ieee80211vap *, struct mbuf *, int); 152 struct mbuf *ieee80211_decap1(struct mbuf *, int *); 153 int ieee80211_setup_rates(struct ieee80211_node *ni, 154 const uint8_t *rates, const uint8_t *xrates, int flags); 155 void ieee80211_send_error(struct ieee80211_node *, 156 const uint8_t mac[IEEE80211_ADDR_LEN], int subtype, int arg); 157 int ieee80211_alloc_challenge(struct ieee80211_node *); 158 int ieee80211_parse_beacon(struct ieee80211_node *, struct mbuf *, 159 struct ieee80211_scanparams *); 160 int ieee80211_parse_action(struct ieee80211_node *, struct mbuf *); 161 #endif /* _NET80211_IEEE80211_INPUT_H_ */ 162