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/*-
* Copyright (c) 2007-2009 Sam Leffler, Errno Consulting
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _NET80211_IEEE80211_INPUT_H_
#define _NET80211_IEEE80211_INPUT_H_
/* Verify the existence and length of __elem or get out. */
#define IEEE80211_VERIFY_ELEMENT(__elem, __maxlen, _action) do { \
if ((__elem) == NULL) { \
IEEE80211_DISCARD(vap, IEEE80211_MSG_ELEMID, \
wh, NULL, "%s", "no " #__elem ); \
vap->iv_stats.is_rx_elem_missing++; \
_action; \
} else if ((__elem)[1] > (__maxlen)) { \
IEEE80211_DISCARD(vap, IEEE80211_MSG_ELEMID, \
wh, NULL, "bad " #__elem " len %d", (__elem)[1]); \
vap->iv_stats.is_rx_elem_toobig++; \
_action; \
} \
} while (0)
#define IEEE80211_VERIFY_LENGTH(_len, _minlen, _action) do { \
if ((_len) < (_minlen)) { \
IEEE80211_DISCARD(vap, IEEE80211_MSG_ELEMID, \
wh, NULL, "ie too short, got %d, expected %d", \
(_len), (_minlen)); \
vap->iv_stats.is_rx_elem_toosmall++; \
_action; \
} \
} while (0)
#ifdef IEEE80211_DEBUG
void ieee80211_ssid_mismatch(struct ieee80211vap *, const char *tag,
uint8_t mac[IEEE80211_ADDR_LEN], uint8_t *ssid);
#define IEEE80211_VERIFY_SSID(_ni, _ssid, _action) do { \
if ((_ssid)[1] != 0 && \
((_ssid)[1] != (_ni)->ni_esslen || \
memcmp((_ssid) + 2, (_ni)->ni_essid, (_ssid)[1]) != 0)) { \
if (ieee80211_msg_input(vap)) \
ieee80211_ssid_mismatch(vap, \
ieee80211_mgt_subtype_name[subtype >> \
IEEE80211_FC0_SUBTYPE_SHIFT], \
wh->i_addr2, _ssid); \
vap->iv_stats.is_rx_ssidmismatch++; \
_action; \
} \
} while (0)
#else /* !IEEE80211_DEBUG */
#define IEEE80211_VERIFY_SSID(_ni, _ssid, _action) do { \
if ((_ssid)[1] != 0 && \
((_ssid)[1] != (_ni)->ni_esslen || \
memcmp((_ssid) + 2, (_ni)->ni_essid, (_ssid)[1]) != 0)) { \
vap->iv_stats.is_rx_ssidmismatch++; \
_action; \
} \
} while (0)
#endif /* !IEEE80211_DEBUG */
/* unalligned little endian access */
#define LE_READ_2(p) \
((uint16_t) \
((((const uint8_t *)(p))[0] ) | \
(((const uint8_t *)(p))[1] << 8)))
#define LE_READ_4(p) \
((uint32_t) \
((((const uint8_t *)(p))[0] ) | \
(((const uint8_t *)(p))[1] << 8) | \
(((const uint8_t *)(p))[2] << 16) | \
(((const uint8_t *)(p))[3] << 24)))
static __inline int
iswpaoui(const uint8_t *frm)
{
return frm[1] > 3 && LE_READ_4(frm+2) == ((WPA_OUI_TYPE<<24)|WPA_OUI);
}
static __inline int
iswmeoui(const uint8_t *frm)
{
return frm[1] > 3 && LE_READ_4(frm+2) == ((WME_OUI_TYPE<<24)|WME_OUI);
}
static __inline int
iswmeparam(const uint8_t *frm)
{
return frm[1] > 5 && LE_READ_4(frm+2) == ((WME_OUI_TYPE<<24)|WME_OUI) &&
frm[6] == WME_PARAM_OUI_SUBTYPE;
}
static __inline int
iswmeinfo(const uint8_t *frm)
{
return frm[1] > 5 && LE_READ_4(frm+2) == ((WME_OUI_TYPE<<24)|WME_OUI) &&
frm[6] == WME_INFO_OUI_SUBTYPE;
}
static __inline int
isatherosoui(const uint8_t *frm)
{
return frm[1] > 3 && LE_READ_4(frm+2) == ((ATH_OUI_TYPE<<24)|ATH_OUI);
}
static __inline int
istdmaoui(const uint8_t *frm)
{
return frm[1] > 3 && LE_READ_4(frm+2) == ((TDMA_OUI_TYPE<<24)|TDMA_OUI);
}
static __inline int
ishtcapoui(const uint8_t *frm)
{
return frm[1] > 3 && LE_READ_4(frm+2) == ((BCM_OUI_HTCAP<<24)|BCM_OUI);
}
static __inline int
ishtinfooui(const uint8_t *frm)
{
return frm[1] > 3 && LE_READ_4(frm+2) == ((BCM_OUI_HTINFO<<24)|BCM_OUI);
}
void ieee80211_deliver_data(struct ieee80211vap *,
struct ieee80211_node *, struct mbuf *);
struct mbuf *ieee80211_defrag(struct ieee80211_node *,
struct mbuf *, int);
struct mbuf *ieee80211_realign(struct ieee80211vap *, struct mbuf *, size_t);
struct mbuf *ieee80211_decap(struct ieee80211vap *, struct mbuf *, int);
struct mbuf *ieee80211_decap1(struct mbuf *, int *);
int ieee80211_setup_rates(struct ieee80211_node *ni,
const uint8_t *rates, const uint8_t *xrates, int flags);
void ieee80211_send_error(struct ieee80211_node *,
const uint8_t mac[IEEE80211_ADDR_LEN], int subtype, int arg);
int ieee80211_alloc_challenge(struct ieee80211_node *);
int ieee80211_parse_beacon(struct ieee80211_node *, struct mbuf *,
struct ieee80211_scanparams *);
int ieee80211_parse_action(struct ieee80211_node *, struct mbuf *);
#endif /* _NET80211_IEEE80211_INPUT_H_ */
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