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393 lines
11 KiB
C
393 lines
11 KiB
C
/*-
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* Copyright (c) 2001 Atsushi Onoe
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* Copyright (c) 2002, 2003 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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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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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_H_
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#define _NET80211_IEEE80211_H_
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/*
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* 802.11 protocol definitions.
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*/
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#define IEEE80211_ADDR_LEN 6 /* size of 802.11 address */
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/* is 802.11 address multicast/broadcast? */
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#define IEEE80211_IS_MULTICAST(_a) (*(_a) & 0x01)
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/* IEEE 802.11 PLCP header */
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struct ieee80211_plcp_hdr {
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u_int16_t i_sfd;
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u_int8_t i_signal;
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u_int8_t i_service;
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u_int16_t i_length;
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u_int16_t i_crc;
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} __attribute__((__packed__));
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/*
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* generic definitions for IEEE 802.11 frames
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*/
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struct ieee80211_frame {
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u_int8_t i_fc[2];
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u_int8_t i_dur[2];
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u_int8_t i_addr1[IEEE80211_ADDR_LEN];
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u_int8_t i_addr2[IEEE80211_ADDR_LEN];
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u_int8_t i_addr3[IEEE80211_ADDR_LEN];
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u_int8_t i_seq[2];
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/* possibly followed by addr4[IEEE80211_ADDR_LEN]; */
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/* see below */
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} __attribute__((__packed__));
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struct ieee80211_frame_addr4 {
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u_int8_t i_fc[2];
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u_int8_t i_dur[2];
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u_int8_t i_addr1[IEEE80211_ADDR_LEN];
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u_int8_t i_addr2[IEEE80211_ADDR_LEN];
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u_int8_t i_addr3[IEEE80211_ADDR_LEN];
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u_int8_t i_seq[2];
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u_int8_t i_addr4[IEEE80211_ADDR_LEN];
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} __attribute__((__packed__));
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#define IEEE80211_FC0_VERSION_MASK 0x03
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#define IEEE80211_FC0_VERSION_SHIFT 0
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#define IEEE80211_FC0_VERSION_0 0x00
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#define IEEE80211_FC0_TYPE_MASK 0x0c
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#define IEEE80211_FC0_TYPE_SHIFT 2
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#define IEEE80211_FC0_TYPE_MGT 0x00
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#define IEEE80211_FC0_TYPE_CTL 0x04
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#define IEEE80211_FC0_TYPE_DATA 0x08
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#define IEEE80211_FC0_SUBTYPE_MASK 0xf0
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#define IEEE80211_FC0_SUBTYPE_SHIFT 4
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/* for TYPE_MGT */
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#define IEEE80211_FC0_SUBTYPE_ASSOC_REQ 0x00
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#define IEEE80211_FC0_SUBTYPE_ASSOC_RESP 0x10
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#define IEEE80211_FC0_SUBTYPE_REASSOC_REQ 0x20
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#define IEEE80211_FC0_SUBTYPE_REASSOC_RESP 0x30
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#define IEEE80211_FC0_SUBTYPE_PROBE_REQ 0x40
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#define IEEE80211_FC0_SUBTYPE_PROBE_RESP 0x50
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#define IEEE80211_FC0_SUBTYPE_BEACON 0x80
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#define IEEE80211_FC0_SUBTYPE_ATIM 0x90
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#define IEEE80211_FC0_SUBTYPE_DISASSOC 0xa0
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#define IEEE80211_FC0_SUBTYPE_AUTH 0xb0
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#define IEEE80211_FC0_SUBTYPE_DEAUTH 0xc0
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/* for TYPE_CTL */
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#define IEEE80211_FC0_SUBTYPE_PS_POLL 0xa0
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#define IEEE80211_FC0_SUBTYPE_RTS 0xb0
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#define IEEE80211_FC0_SUBTYPE_CTS 0xc0
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#define IEEE80211_FC0_SUBTYPE_ACK 0xd0
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#define IEEE80211_FC0_SUBTYPE_CF_END 0xe0
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#define IEEE80211_FC0_SUBTYPE_CF_END_ACK 0xf0
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/* for TYPE_DATA (bit combination) */
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#define IEEE80211_FC0_SUBTYPE_DATA 0x00
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#define IEEE80211_FC0_SUBTYPE_CF_ACK 0x10
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#define IEEE80211_FC0_SUBTYPE_CF_POLL 0x20
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#define IEEE80211_FC0_SUBTYPE_CF_ACPL 0x30
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#define IEEE80211_FC0_SUBTYPE_NODATA 0x40
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#define IEEE80211_FC0_SUBTYPE_CFACK 0x50
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#define IEEE80211_FC0_SUBTYPE_CFPOLL 0x60
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#define IEEE80211_FC0_SUBTYPE_CF_ACK_CF_ACK 0x70
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#define IEEE80211_FC1_DIR_MASK 0x03
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#define IEEE80211_FC1_DIR_NODS 0x00 /* STA->STA */
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#define IEEE80211_FC1_DIR_TODS 0x01 /* STA->AP */
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#define IEEE80211_FC1_DIR_FROMDS 0x02 /* AP ->STA */
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#define IEEE80211_FC1_DIR_DSTODS 0x03 /* AP ->AP */
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#define IEEE80211_FC1_MORE_FRAG 0x04
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#define IEEE80211_FC1_RETRY 0x08
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#define IEEE80211_FC1_PWR_MGT 0x10
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#define IEEE80211_FC1_MORE_DATA 0x20
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#define IEEE80211_FC1_WEP 0x40
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#define IEEE80211_FC1_ORDER 0x80
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#define IEEE80211_SEQ_FRAG_MASK 0x000f
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#define IEEE80211_SEQ_FRAG_SHIFT 0
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#define IEEE80211_SEQ_SEQ_MASK 0xfff0
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#define IEEE80211_SEQ_SEQ_SHIFT 4
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#define IEEE80211_NWID_LEN 32
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/*
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* Control frames.
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*/
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struct ieee80211_frame_min {
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u_int8_t i_fc[2];
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u_int8_t i_dur[2];
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u_int8_t i_addr1[IEEE80211_ADDR_LEN];
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u_int8_t i_addr2[IEEE80211_ADDR_LEN];
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/* FCS */
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} __attribute__((__packed__));
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struct ieee80211_frame_rts {
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u_int8_t i_fc[2];
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u_int8_t i_dur[2];
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u_int8_t i_ra[IEEE80211_ADDR_LEN];
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u_int8_t i_ta[IEEE80211_ADDR_LEN];
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/* FCS */
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} __attribute__((__packed__));
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struct ieee80211_frame_cts {
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u_int8_t i_fc[2];
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u_int8_t i_dur[2];
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u_int8_t i_ra[IEEE80211_ADDR_LEN];
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/* FCS */
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} __attribute__((__packed__));
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struct ieee80211_frame_ack {
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u_int8_t i_fc[2];
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u_int8_t i_dur[2];
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u_int8_t i_ra[IEEE80211_ADDR_LEN];
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/* FCS */
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} __attribute__((__packed__));
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struct ieee80211_frame_pspoll {
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u_int8_t i_fc[2];
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u_int8_t i_aid[2];
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u_int8_t i_bssid[IEEE80211_ADDR_LEN];
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u_int8_t i_ta[IEEE80211_ADDR_LEN];
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/* FCS */
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} __attribute__((__packed__));
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struct ieee80211_frame_cfend { /* NB: also CF-End+CF-Ack */
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u_int8_t i_fc[2];
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u_int8_t i_dur[2]; /* should be zero */
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u_int8_t i_ra[IEEE80211_ADDR_LEN];
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u_int8_t i_bssid[IEEE80211_ADDR_LEN];
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/* FCS */
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} __attribute__((__packed__));
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/*
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* BEACON management packets
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*
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* octet timestamp[8]
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* octet beacon interval[2]
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* octet capability information[2]
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* information element
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* octet elemid
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* octet length
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* octet information[length]
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*/
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typedef uint8_t *ieee80211_mgt_beacon_t;
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#define IEEE80211_BEACON_INTERVAL(beacon) \
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((beacon)[8] | ((beacon)[9] << 8))
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#define IEEE80211_BEACON_CAPABILITY(beacon) \
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((beacon)[10] | ((beacon)[11] << 8))
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#define IEEE80211_CAPINFO_ESS 0x0001
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#define IEEE80211_CAPINFO_IBSS 0x0002
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#define IEEE80211_CAPINFO_CF_POLLABLE 0x0004
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#define IEEE80211_CAPINFO_CF_POLLREQ 0x0008
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#define IEEE80211_CAPINFO_PRIVACY 0x0010
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#define IEEE80211_CAPINFO_SHORT_PREAMBLE 0x0020
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#define IEEE80211_CAPINFO_PBCC 0x0040
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#define IEEE80211_CAPINFO_CHNL_AGILITY 0x0080
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/* bits 8-9 are reserved */
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#define IEEE80211_CAPINFO_SHORT_SLOTTIME 0x0400
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/* bits 11-12 are reserved */
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#define IEEE80211_CAPINFO_DSSSOFDM 0x2000
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/* bits 14-15 are reserved */
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/*
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* Management information elements
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*/
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struct ieee80211_information {
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char ssid[IEEE80211_NWID_LEN+1];
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struct rates {
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u_int8_t *p;
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} rates;
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struct fh {
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u_int16_t dwell;
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u_int8_t set;
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u_int8_t pattern;
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u_int8_t index;
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} fh;
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struct ds {
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u_int8_t channel;
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} ds;
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struct cf {
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u_int8_t count;
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u_int8_t period;
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u_int8_t maxdur[2];
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u_int8_t dur[2];
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} cf;
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struct tim {
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u_int8_t count;
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u_int8_t period;
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u_int8_t bitctl;
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/* u_int8_t pvt[251]; The driver needs to use this. */
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} tim;
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struct ibss {
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u_int16_t atim;
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} ibss;
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struct challenge {
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u_int8_t *p;
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u_int8_t len;
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} challenge;
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struct erp {
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u_int8_t flags;
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} erp;
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};
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enum {
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IEEE80211_ELEMID_SSID = 0,
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IEEE80211_ELEMID_RATES = 1,
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IEEE80211_ELEMID_FHPARMS = 2,
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IEEE80211_ELEMID_DSPARMS = 3,
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IEEE80211_ELEMID_CFPARMS = 4,
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IEEE80211_ELEMID_TIM = 5,
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IEEE80211_ELEMID_IBSSPARMS = 6,
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IEEE80211_ELEMID_COUNTRY = 7,
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IEEE80211_ELEMID_CHALLENGE = 16,
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IEEE80211_ELEMID_ERP = 42,
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IEEE80211_ELEMID_XRATES = 50,
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};
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#define IEEE80211_RATE_BASIC 0x80
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#define IEEE80211_RATE_VAL 0x7f
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/* EPR information element flags */
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#define IEEE80211_ERP_NON_ERP_PRESENT 0x01
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#define IEEE80211_ERP_USE_PROTECTION 0x02
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#define IEEE80211_ERP_BARKER_MODE 0x04
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/*
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* AUTH management packets
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*
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* octet algo[2]
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* octet seq[2]
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* octet status[2]
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* octet chal.id
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* octet chal.length
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* octet chal.text[253]
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*/
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typedef u_int8_t *ieee80211_mgt_auth_t;
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#define IEEE80211_AUTH_ALGORITHM(auth) \
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((auth)[0] | ((auth)[1] << 8))
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#define IEEE80211_AUTH_TRANSACTION(auth) \
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((auth)[2] | ((auth)[3] << 8))
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#define IEEE80211_AUTH_STATUS(auth) \
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((auth)[4] | ((auth)[5] << 8))
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#define IEEE80211_AUTH_ALG_OPEN 0x0000
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#define IEEE80211_AUTH_ALG_SHARED 0x0001
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enum {
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IEEE80211_AUTH_OPEN_REQUEST = 1,
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IEEE80211_AUTH_OPEN_RESPONSE = 2,
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};
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enum {
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IEEE80211_AUTH_SHARED_REQUEST = 1,
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IEEE80211_AUTH_SHARED_CHALLENGE = 2,
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IEEE80211_AUTH_SHARED_RESPONSE = 3,
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IEEE80211_AUTH_SHARED_PASS = 4,
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};
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/*
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* Reason codes
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*
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* Unlisted codes are reserved
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*/
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enum {
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IEEE80211_REASON_UNSPECIFIED = 1,
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IEEE80211_REASON_AUTH_EXPIRE = 2,
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IEEE80211_REASON_AUTH_LEAVE = 3,
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IEEE80211_REASON_ASSOC_EXPIRE = 4,
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IEEE80211_REASON_ASSOC_TOOMANY = 5,
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IEEE80211_REASON_NOT_AUTHED = 6,
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IEEE80211_REASON_NOT_ASSOCED = 7,
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IEEE80211_REASON_ASSOC_LEAVE = 8,
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IEEE80211_REASON_ASSOC_NOT_AUTHED = 9,
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IEEE80211_STATUS_SUCCESS = 0,
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IEEE80211_STATUS_UNSPECIFIED = 1,
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IEEE80211_STATUS_CAPINFO = 10,
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IEEE80211_STATUS_NOT_ASSOCED = 11,
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IEEE80211_STATUS_OTHER = 12,
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IEEE80211_STATUS_ALG = 13,
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IEEE80211_STATUS_SEQUENCE = 14,
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IEEE80211_STATUS_CHALLENGE = 15,
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IEEE80211_STATUS_TIMEOUT = 16,
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IEEE80211_STATUS_TOOMANY = 17,
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IEEE80211_STATUS_BASIC_RATE = 18,
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IEEE80211_STATUS_SP_REQUIRED = 19,
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IEEE80211_STATUS_PBCC_REQUIRED = 20,
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IEEE80211_STATUS_CA_REQUIRED = 21,
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IEEE80211_STATUS_TOO_MANY_STATIONS = 22,
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IEEE80211_STATUS_RATES = 23,
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IEEE80211_STATUS_SHORTSLOT_REQUIRED = 25,
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IEEE80211_STATUS_DSSSOFDM_REQUIRED = 26,
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};
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#define IEEE80211_WEP_KEYLEN 5 /* 40bit */
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#define IEEE80211_WEP_IVLEN 3 /* 24bit */
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#define IEEE80211_WEP_KIDLEN 1 /* 1 octet */
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#define IEEE80211_WEP_CRCLEN 4 /* CRC-32 */
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#define IEEE80211_WEP_NKID 4 /* number of key ids */
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#define IEEE80211_CRC_LEN 4
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/*
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* Maximum acceptable MTU is:
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* IEEE80211_MAX_LEN - WEP overhead - CRC -
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* QoS overhead - RSN/WPA overhead
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* Min is arbitrarily chosen > IEEE80211_MIN_LEN. The default
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* mtu is Ethernet-compatible; it's set by ether_ifattach.
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*/
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#define IEEE80211_MTU_MAX 2290
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#define IEEE80211_MTU_MIN 32
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#define IEEE80211_MAX_LEN (2300 + IEEE80211_CRC_LEN + \
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(IEEE80211_WEP_IVLEN + IEEE80211_WEP_KIDLEN + IEEE80211_WEP_CRCLEN))
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#define IEEE80211_MIN_LEN \
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(sizeof(struct ieee80211_frame_min) + IEEE80211_CRC_LEN)
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/*
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* RTS frame length parameters. The default is specified in
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* the 802.11 spec. The max may be wrong for jumbo frames.
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*/
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#define IEEE80211_RTS_DEFAULT 512
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#define IEEE80211_RTS_MIN 1
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#define IEEE80211_RTS_MAX IEEE80211_MAX_LEN
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enum {
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IEEE80211_AUTH_NONE = 0,
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IEEE80211_AUTH_OPEN = 1,
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IEEE80211_AUTH_SHARED = 2,
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};
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#endif /* _NET80211_IEEE80211_H_ */
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