mirror of https://github.com/proski/madwifi
223 lines
9.0 KiB
C
223 lines
9.0 KiB
C
/*-
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* Copyright (c) 2005 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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* $Id$
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*/
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#ifndef _NET80211_IEEE80211_SCAN_H_
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#define _NET80211_IEEE80211_SCAN_H_
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#define IEEE80211_SCAN_MAX IEEE80211_CHAN_MAX
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struct ieee80211_scanner;
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struct ieee80211_scan_entry;
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struct ieee80211_scan_ssid {
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int len; /* length in bytes */
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u_int8_t ssid[IEEE80211_NWID_LEN]; /* ssid contents */
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};
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#define IEEE80211_SCAN_MAX_SSID 1
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struct ieee80211_scan_state {
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struct ieee80211vap *ss_vap;
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const struct ieee80211_scanner *ss_ops; /* policy hookup, see below */
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void *ss_priv; /* scanner private state */
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u_int16_t ss_flags;
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#define IEEE80211_SCAN_NOPICK 0x0001 /* scan only, no selection */
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#define IEEE80211_SCAN_ACTIVE 0x0002 /* active scan (probe req) */
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#define IEEE80211_SCAN_PICK1ST 0x0004 /* ``hey sailor'' mode */
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#define IEEE80211_SCAN_BGSCAN 0x0008 /* bg scan, exit ps at end */
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#define IEEE80211_SCAN_ONCE 0x0010 /* do one complete pass */
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#define IEEE80211_SCAN_GOTPICK 0x1000 /* got candidate, can stop */
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u_int8_t ss_nssid; /* # SSIDs to probe/match */
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struct ieee80211_scan_ssid ss_ssid[IEEE80211_SCAN_MAX_SSID];
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/* SSIDs to probe/match */
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/* ordered channel set */
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struct ieee80211_channel *ss_chans[IEEE80211_SCAN_MAX];
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u_int16_t ss_next; /* ix of next chan to scan */
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u_int16_t ss_last; /* ix + 1 of last chan to scan */
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unsigned long ss_mindwell; /* min dwell on channel */
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unsigned long ss_maxdwell; /* max dwell on channel */
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u_int ss_duration; /* used for calling ieee80211_start_scan() */
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};
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/*
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* The upper 16 bits of the flags word is used to communicate
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* information to the scanning code that is NOT recorded in
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* ss_flags. It might be better to split this stuff out into
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* a separate variable to avoid confusion.
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*/
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#define IEEE80211_SCAN_FLUSH 0x10000 /* flush candidate table */
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#define IEEE80211_SCAN_NOSSID 0x20000 /* don't update ssid list */
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#define IEEE80211_SCAN_USECACHE 0x40000 /* Must use a result from the cache */
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#define IEEE80211_SCAN_KEEPMODE 0x80000 /* Must keep the same wireless mode (11a, 11g, or 11at, etc) */
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struct ieee80211com;
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void ieee80211_scan_attach(struct ieee80211com *);
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void ieee80211_scan_detach(struct ieee80211com *);
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void ieee80211_scan_vattach(struct ieee80211vap *);
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void ieee80211_scan_vdetach(struct ieee80211vap *);
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void ieee80211_scan_dump_channels(const struct ieee80211_scan_state *);
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#define IEEE80211_SCAN_FOREVER 0x7fffffff
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int ieee80211_start_scan(struct ieee80211vap *, int, u_int, u_int,
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const struct ieee80211_scan_ssid ssids[]);
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int ieee80211_check_scan(struct ieee80211vap *, int, u_int, u_int,
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const struct ieee80211_scan_ssid ssids[],
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int (*action)(struct ieee80211vap *, const struct ieee80211_scan_entry *));
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int ieee80211_bg_scan(struct ieee80211vap *);
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void ieee80211_cancel_scan(struct ieee80211vap *);
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void ieee80211_scan_dfs_action(struct ieee80211vap *);
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struct ieee80211_scanparams;
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void ieee80211_add_scan(struct ieee80211vap *, const struct ieee80211_scanparams *,
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const struct ieee80211_frame *, int, int, u_int64_t);
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void ieee80211_scan_timeout(struct ieee80211com *);
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void ieee80211_scan_assoc_success(struct ieee80211com *,
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const u_int8_t mac[IEEE80211_ADDR_LEN]);
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enum {
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IEEE80211_SCAN_FAIL_TIMEOUT = 1, /* no response to mgmt frame */
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IEEE80211_SCAN_FAIL_STATUS = 2 /* negative response to " " */
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};
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void ieee80211_scan_assoc_fail(struct ieee80211com *,
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const u_int8_t mac[IEEE80211_ADDR_LEN], int);
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void ieee80211_scan_flush(struct ieee80211com *);
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struct ieee80211_scan_entry;
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typedef int ieee80211_scan_iter_func(void *, const struct ieee80211_scan_entry *);
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int ieee80211_scan_iterate(struct ieee80211com *, ieee80211_scan_iter_func *, void *);
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/*
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* Parameters supplied when adding/updating an entry in a
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* scan cache. Pointer variables should be set to NULL
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* if no data is available. Pointer references can be to
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* local data; any information that is saved will be copied.
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* All multi-byte values must be in host byte order.
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*/
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struct ieee80211_scanparams {
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u_int16_t capinfo; /* 802.11 capabilities */
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u_int16_t fhdwell; /* FHSS dwell interval */
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u_int8_t chan; /* */
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u_int8_t bchan;
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u_int8_t fhindex;
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u_int8_t erp;
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u_int16_t bintval;
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u_int8_t timoff;
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u_int8_t *tim;
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u_int8_t *tstamp;
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u_int8_t *country;
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u_int8_t *ssid;
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u_int8_t *rates;
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u_int8_t *xrates;
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u_int8_t *csa;
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u_int8_t *wpa;
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u_int8_t *rsn;
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u_int8_t *wme;
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u_int8_t *ath;
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};
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/*
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* Scan cache entry format used when exporting data from a policy
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* module; this data may be represented some other way internally.
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*/
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struct ieee80211_scan_entry {
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u_int8_t se_macaddr[IEEE80211_ADDR_LEN];
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u_int8_t se_bssid[IEEE80211_ADDR_LEN];
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u_int8_t se_ssid[2 + IEEE80211_NWID_LEN];
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u_int8_t se_rates[2 + IEEE80211_RATE_MAXSIZE];
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u_int8_t se_xrates[2 + IEEE80211_RATE_MAXSIZE];
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u_int64_t se_rtsf; /* recv timestamp */
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union {
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u_int8_t data[8];
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__le64 tsf;
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} se_tstamp; /* from last rcv'd beacon */
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u_int16_t se_intval; /* beacon interval (host byte order) */
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u_int16_t se_capinfo; /* capabilities (host byte order) */
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struct ieee80211_channel *se_chan;/* channel where sta found */
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u_int16_t se_timoff; /* byte offset to TIM ie */
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u_int16_t se_fhdwell; /* FH only (host byte order) */
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u_int8_t se_fhindex; /* FH only */
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u_int8_t se_erp; /* ERP from beacon/probe resp */
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int8_t se_rssi; /* avg'd recv ssi */
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u_int8_t se_dtimperiod; /* DTIM period */
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u_int8_t *se_wpa_ie; /* captured WPA ie */
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u_int8_t *se_rsn_ie; /* captured RSN ie */
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u_int8_t *se_wme_ie; /* captured WME ie */
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u_int8_t *se_ath_ie; /* captured Atheros ie */
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u_int se_age; /* age of entry (0 on create) */
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};
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/*
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* Template for an in-kernel scan policy module.
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* Modules register with the scanning code and are
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* typically loaded as needed.
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*/
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struct ieee80211_scanner {
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const char *scan_name; /* printable name */
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int (*scan_attach)(struct ieee80211_scan_state *);
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int (*scan_detach)(struct ieee80211_scan_state *);
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int (*scan_start)(struct ieee80211_scan_state *, struct ieee80211vap *);
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int (*scan_restart)(struct ieee80211_scan_state *, struct ieee80211vap *);
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int (*scan_cancel)(struct ieee80211_scan_state *, struct ieee80211vap *);
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int (*scan_end)(struct ieee80211_scan_state *, struct ieee80211vap *,
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int (*action)(struct ieee80211vap *, const struct ieee80211_scan_entry *),
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u_int32_t);
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int (*scan_flush)(struct ieee80211_scan_state *);
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/* add an entry to the cache */
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int (*scan_add)(struct ieee80211_scan_state *,
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const struct ieee80211_scanparams *,
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const struct ieee80211_frame *, int, int, u_int64_t);
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/* age and/or purge entries in the cache */
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void (*scan_age)(struct ieee80211_scan_state *);
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/* note that association failed for an entry */
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void (*scan_assoc_fail)(struct ieee80211_scan_state *,
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const u_int8_t macaddr[IEEE80211_ADDR_LEN], int);
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/* note that association succeed for an entry */
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void (*scan_assoc_success)(struct ieee80211_scan_state *,
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const u_int8_t macaddr[IEEE80211_ADDR_LEN]);
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/* iterate over entries in the scan cache */
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int (*scan_iterate)(struct ieee80211_scan_state *,
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ieee80211_scan_iter_func *, void *);
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/* default action to take when found scan match */
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int (*scan_default)(struct ieee80211vap *,
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const struct ieee80211_scan_entry *);
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};
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const struct ieee80211_scanner *ieee80211_scanner_get(enum ieee80211_opmode,
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int);
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void ieee80211_scanner_register(enum ieee80211_opmode,
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const struct ieee80211_scanner *);
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void ieee80211_scanner_unregister(enum ieee80211_opmode,
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const struct ieee80211_scanner *);
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void ieee80211_scanner_unregister_all(const struct ieee80211_scanner *);
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#endif /* _NET80211_IEEE80211_SCAN_H_ */
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