160 lines
5.4 KiB
C
160 lines
5.4 KiB
C
/*-
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* Copyright (c) 2007-2009 Sam Leffler, Errno Consulting
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _NET80211_IEEE80211_INPUT_H_
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#define _NET80211_IEEE80211_INPUT_H_
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/* Verify the existence and length of __elem or get out. */
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#define IEEE80211_VERIFY_ELEMENT(__elem, __maxlen, _action) do { \
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if ((__elem) == NULL) { \
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IEEE80211_DISCARD(vap, IEEE80211_MSG_ELEMID, \
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wh, NULL, "%s", "no " #__elem ); \
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vap->iv_stats.is_rx_elem_missing++; \
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_action; \
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} else if ((__elem)[1] > (__maxlen)) { \
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IEEE80211_DISCARD(vap, IEEE80211_MSG_ELEMID, \
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wh, NULL, "bad " #__elem " len %d", (__elem)[1]); \
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vap->iv_stats.is_rx_elem_toobig++; \
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_action; \
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} \
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} while (0)
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#define IEEE80211_VERIFY_LENGTH(_len, _minlen, _action) do { \
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if ((_len) < (_minlen)) { \
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IEEE80211_DISCARD(vap, IEEE80211_MSG_ELEMID, \
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wh, NULL, "ie too short, got %d, expected %d", \
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(_len), (_minlen)); \
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vap->iv_stats.is_rx_elem_toosmall++; \
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_action; \
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} \
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} while (0)
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#ifdef IEEE80211_DEBUG
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void ieee80211_ssid_mismatch(struct ieee80211vap *, const char *tag,
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uint8_t mac[IEEE80211_ADDR_LEN], uint8_t *ssid);
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#define IEEE80211_VERIFY_SSID(_ni, _ssid, _action) do { \
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if ((_ssid)[1] != 0 && \
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((_ssid)[1] != (_ni)->ni_esslen || \
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memcmp((_ssid) + 2, (_ni)->ni_essid, (_ssid)[1]) != 0)) { \
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if (ieee80211_msg_input(vap)) \
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ieee80211_ssid_mismatch(vap, \
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ieee80211_mgt_subtype_name[subtype >> \
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IEEE80211_FC0_SUBTYPE_SHIFT], \
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wh->i_addr2, _ssid); \
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vap->iv_stats.is_rx_ssidmismatch++; \
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_action; \
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} \
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} while (0)
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#else /* !IEEE80211_DEBUG */
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#define IEEE80211_VERIFY_SSID(_ni, _ssid, _action) do { \
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if ((_ssid)[1] != 0 && \
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((_ssid)[1] != (_ni)->ni_esslen || \
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memcmp((_ssid) + 2, (_ni)->ni_essid, (_ssid)[1]) != 0)) { \
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vap->iv_stats.is_rx_ssidmismatch++; \
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_action; \
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} \
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} while (0)
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#endif /* !IEEE80211_DEBUG */
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/* unalligned little endian access */
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#define LE_READ_2(p) \
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((uint16_t) \
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((((const uint8_t *)(p))[0] ) | \
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(((const uint8_t *)(p))[1] << 8)))
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#define LE_READ_4(p) \
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((uint32_t) \
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((((const uint8_t *)(p))[0] ) | \
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(((const uint8_t *)(p))[1] << 8) | \
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(((const uint8_t *)(p))[2] << 16) | \
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(((const uint8_t *)(p))[3] << 24)))
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static __inline int
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iswpaoui(const uint8_t *frm)
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{
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return frm[1] > 3 && LE_READ_4(frm+2) == ((WPA_OUI_TYPE<<24)|WPA_OUI);
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}
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static __inline int
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iswmeoui(const uint8_t *frm)
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{
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return frm[1] > 3 && LE_READ_4(frm+2) == ((WME_OUI_TYPE<<24)|WME_OUI);
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}
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static __inline int
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iswmeparam(const uint8_t *frm)
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{
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return frm[1] > 5 && LE_READ_4(frm+2) == ((WME_OUI_TYPE<<24)|WME_OUI) &&
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frm[6] == WME_PARAM_OUI_SUBTYPE;
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}
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static __inline int
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iswmeinfo(const uint8_t *frm)
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{
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return frm[1] > 5 && LE_READ_4(frm+2) == ((WME_OUI_TYPE<<24)|WME_OUI) &&
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frm[6] == WME_INFO_OUI_SUBTYPE;
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}
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static __inline int
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isatherosoui(const uint8_t *frm)
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{
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return frm[1] > 3 && LE_READ_4(frm+2) == ((ATH_OUI_TYPE<<24)|ATH_OUI);
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}
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static __inline int
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istdmaoui(const uint8_t *frm)
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{
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return frm[1] > 3 && LE_READ_4(frm+2) == ((TDMA_OUI_TYPE<<24)|TDMA_OUI);
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}
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static __inline int
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ishtcapoui(const uint8_t *frm)
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{
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return frm[1] > 3 && LE_READ_4(frm+2) == ((BCM_OUI_HTCAP<<24)|BCM_OUI);
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}
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static __inline int
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ishtinfooui(const uint8_t *frm)
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{
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return frm[1] > 3 && LE_READ_4(frm+2) == ((BCM_OUI_HTINFO<<24)|BCM_OUI);
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}
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void ieee80211_deliver_data(struct ieee80211vap *,
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struct ieee80211_node *, struct mbuf *);
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struct mbuf *ieee80211_defrag(struct ieee80211_node *,
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struct mbuf *, int);
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struct mbuf *ieee80211_decap(struct ieee80211vap *, struct mbuf *, int);
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struct mbuf *ieee80211_decap1(struct mbuf *, int *);
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int ieee80211_setup_rates(struct ieee80211_node *ni,
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const uint8_t *rates, const uint8_t *xrates, int flags);
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void ieee80211_send_error(struct ieee80211_node *,
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const uint8_t mac[IEEE80211_ADDR_LEN], int subtype, int arg);
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int ieee80211_alloc_challenge(struct ieee80211_node *);
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int ieee80211_parse_beacon(struct ieee80211_node *, struct mbuf *,
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struct ieee80211_scanparams *);
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int ieee80211_parse_action(struct ieee80211_node *, struct mbuf *);
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#endif /* _NET80211_IEEE80211_INPUT_H_ */
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