diff options
Diffstat (limited to 'drivers/ar6000/wlan/wlan_recv_beacon.c')
| -rw-r--r-- | drivers/ar6000/wlan/wlan_recv_beacon.c | 192 |
1 files changed, 192 insertions, 0 deletions
diff --git a/drivers/ar6000/wlan/wlan_recv_beacon.c b/drivers/ar6000/wlan/wlan_recv_beacon.c new file mode 100644 index 00000000000..15beabb6549 --- /dev/null +++ b/drivers/ar6000/wlan/wlan_recv_beacon.c @@ -0,0 +1,192 @@ +/*- + * Copyright (c) 2001 Atsushi Onoe + * Copyright (c) 2002-2004 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. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2 as published by the Free + * Software Foundation. + * + * 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. + */ +/* + * IEEE 802.11 input handling. + */ + +#include "a_config.h" +#include "athdefs.h" +#include "a_types.h" +#include "a_osapi.h" +#include <wmi.h> +#include <ieee80211.h> +#include <wlan_api.h> + +#define IEEE80211_VERIFY_LENGTH(_len, _minlen) do { \ + if ((_len) < (_minlen)) { \ + return A_EINVAL; \ + } \ +} while (0) + +#define IEEE80211_VERIFY_ELEMENT(__elem, __maxlen) do { \ + if ((__elem) == NULL) { \ + return A_EINVAL; \ + } \ + if ((__elem)[1] > (__maxlen)) { \ + return A_EINVAL; \ + } \ +} while (0) + + +/* unaligned little endian access */ +#define LE_READ_2(p) \ + ((A_UINT16) \ + ((((A_UINT8 *)(p))[0] ) | (((A_UINT8 *)(p))[1] << 8))) + +#define LE_READ_4(p) \ + ((A_UINT32) \ + ((((A_UINT8 *)(p))[0] ) | (((A_UINT8 *)(p))[1] << 8) | \ + (((A_UINT8 *)(p))[2] << 16) | (((A_UINT8 *)(p))[3] << 24))) + + +static int __inline +iswpaoui(const A_UINT8 *frm) +{ + return frm[1] > 3 && LE_READ_4(frm+2) == ((WPA_OUI_TYPE<<24)|WPA_OUI); +} + +static int __inline +iswmmoui(const A_UINT8 *frm) +{ + return frm[1] > 3 && LE_READ_4(frm+2) == ((WMM_OUI_TYPE<<24)|WMM_OUI); +} + +static int __inline +iswmmparam(const A_UINT8 *frm) +{ + return frm[1] > 5 && frm[6] == WMM_PARAM_OUI_SUBTYPE; +} + +static int __inline +iswmminfo(const A_UINT8 *frm) +{ + return frm[1] > 5 && frm[6] == WMM_INFO_OUI_SUBTYPE; +} + +static int __inline +isatherosoui(const A_UINT8 *frm) +{ + return frm[1] > 3 && LE_READ_4(frm+2) == ((ATH_OUI_TYPE<<24)|ATH_OUI); +} + +static int __inline +iswscoui(const A_UINT8 *frm) +{ + return frm[1] > 3 && LE_READ_4(frm+2) == ((0x04<<24)|WPA_OUI); +} + +A_STATUS +wlan_parse_beacon(A_UINT8 *buf, int framelen, struct ieee80211_common_ie *cie) +{ + A_UINT8 *frm, *efrm; + + frm = buf; + efrm = (A_UINT8 *) (frm + framelen); + + /* + * beacon/probe response frame format + * [8] time stamp + * [2] beacon interval + * [2] capability information + * [tlv] ssid + * [tlv] supported rates + * [tlv] country information + * [tlv] parameter set (FH/DS) + * [tlv] erp information + * [tlv] extended supported rates + * [tlv] WMM + * [tlv] WPA or RSN + * [tlv] Atheros Advanced Capabilities + */ + IEEE80211_VERIFY_LENGTH(efrm - frm, 12); + A_MEMZERO(cie, sizeof(*cie)); + + cie->ie_tstamp = frm; frm += 8; + cie->ie_beaconInt = A_LE2CPU16(*(A_UINT16 *)frm); frm += 2; + cie->ie_capInfo = A_LE2CPU16(*(A_UINT16 *)frm); frm += 2; + cie->ie_chan = 0; + + while (frm < efrm) { + switch (*frm) { + case IEEE80211_ELEMID_SSID: + cie->ie_ssid = frm; + break; + case IEEE80211_ELEMID_RATES: + cie->ie_rates = frm; + break; + case IEEE80211_ELEMID_COUNTRY: + cie->ie_country = frm; + break; + case IEEE80211_ELEMID_FHPARMS: + break; + case IEEE80211_ELEMID_DSPARMS: + cie->ie_chan = frm[2]; + break; + case IEEE80211_ELEMID_TIM: + cie->ie_tim = frm; + break; + case IEEE80211_ELEMID_IBSSPARMS: + break; + case IEEE80211_ELEMID_XRATES: + cie->ie_xrates = frm; + break; + case IEEE80211_ELEMID_ERP: + if (frm[1] != 1) { + //A_PRINTF("Discarding ERP Element - Bad Len\n"); + return A_EINVAL; + } + cie->ie_erp = frm[2]; + break; + case IEEE80211_ELEMID_RSN: + cie->ie_rsn = frm; + break; + case IEEE80211_ELEMID_VENDOR: + if (iswpaoui(frm)) { + cie->ie_wpa = frm; + } else if (iswmmoui(frm)) { + cie->ie_wmm = frm; + } else if (isatherosoui(frm)) { + cie->ie_ath = frm; + } else if(iswscoui(frm)) { + cie->ie_wsc = frm; + } + break; + default: + break; + } + frm += frm[1] + 2; + } + IEEE80211_VERIFY_ELEMENT(cie->ie_rates, IEEE80211_RATE_MAXSIZE); + IEEE80211_VERIFY_ELEMENT(cie->ie_ssid, IEEE80211_NWID_LEN); + + return A_OK; +} |