ebdda46c84
stations in ap mode. Track when a node's first auth frame is received and use this to decide whether or not to bump the refcnt. This insures we only ever bump the refcnt once. Reviewed by: avatar Approved by: re (scottl)
286 lines
12 KiB
C
286 lines
12 KiB
C
/*-
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* Copyright (c) 2001 Atsushi Onoe
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* Copyright (c) 2002-2005 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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* $FreeBSD$
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*/
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#ifndef _NET80211_IEEE80211_NODE_H_
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#define _NET80211_IEEE80211_NODE_H_
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#include <net80211/ieee80211_ioctl.h> /* for ieee80211_nodestats */
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/*
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* Each ieee80211com instance has a single timer that fires once a
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* second. This is used to initiate various work depending on the
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* state of the instance: scanning (passive or active), ``transition''
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* (waiting for a response to a management frame when operating
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* as a station), and node inactivity processing (when operating
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* as an AP). For inactivity processing each node has a timeout
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* set in it's ni_inact field that is decremented on each timeout
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* and the node is reclaimed when the counter goes to zero. We
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* use different inactivity timeout values depending on whether
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* the node is associated and authorized (either by 802.1x or
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* open/shared key authentication) or associated but yet to be
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* authorized. The latter timeout is shorter to more aggressively
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* reclaim nodes that leave part way through the 802.1x exchange.
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*/
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#define IEEE80211_INACT_WAIT 15 /* inactivity interval (secs) */
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#define IEEE80211_INACT_INIT (30/IEEE80211_INACT_WAIT) /* initial */
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#define IEEE80211_INACT_AUTH (180/IEEE80211_INACT_WAIT) /* associated but not authorized */
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#define IEEE80211_INACT_RUN (300/IEEE80211_INACT_WAIT) /* authorized */
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#define IEEE80211_INACT_PROBE (30/IEEE80211_INACT_WAIT) /* probe */
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#define IEEE80211_INACT_SCAN (300/IEEE80211_INACT_WAIT) /* scanned */
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#define IEEE80211_TRANS_WAIT 5 /* mgt frame tx timer (secs) */
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#define IEEE80211_NODE_HASHSIZE 32
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/* simple hash is enough for variation of macaddr */
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#define IEEE80211_NODE_HASH(addr) \
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(((const u_int8_t *)(addr))[IEEE80211_ADDR_LEN - 1] % \
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IEEE80211_NODE_HASHSIZE)
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struct ieee80211_rsnparms {
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u_int8_t rsn_mcastcipher; /* mcast/group cipher */
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u_int8_t rsn_mcastkeylen; /* mcast key length */
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u_int8_t rsn_ucastcipherset; /* unicast cipher set */
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u_int8_t rsn_ucastcipher; /* selected unicast cipher */
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u_int8_t rsn_ucastkeylen; /* unicast key length */
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u_int8_t rsn_keymgmtset; /* key mangement algorithms */
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u_int8_t rsn_keymgmt; /* selected key mgmt algo */
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u_int16_t rsn_caps; /* capabilities */
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};
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struct ieee80211_node_table;
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struct ieee80211com;
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/*
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* Node specific information. Note that drivers are expected
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* to derive from this structure to add device-specific per-node
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* state. This is done by overriding the ic_node_* methods in
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* the ieee80211com structure.
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*/
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struct ieee80211_node {
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struct ieee80211com *ni_ic;
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struct ieee80211_node_table *ni_table;
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TAILQ_ENTRY(ieee80211_node) ni_list;
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LIST_ENTRY(ieee80211_node) ni_hash;
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u_int ni_refcnt;
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u_int ni_scangen; /* gen# for timeout scan */
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u_int8_t ni_authmode; /* authentication algorithm */
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u_int16_t ni_flags; /* special-purpose state */
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#define IEEE80211_NODE_AUTH 0x0001 /* authorized for data */
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#define IEEE80211_NODE_QOS 0x0002 /* QoS enabled */
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#define IEEE80211_NODE_ERP 0x0004 /* ERP enabled */
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/* NB: this must have the same value as IEEE80211_FC1_PWR_MGT */
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#define IEEE80211_NODE_PWR_MGT 0x0010 /* power save mode enabled */
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#define IEEE80211_NODE_AREF 0x0020 /* authentication ref held */
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u_int16_t ni_associd; /* assoc response */
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u_int16_t ni_txpower; /* current transmit power */
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u_int16_t ni_vlan; /* vlan tag */
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u_int32_t *ni_challenge; /* shared-key challenge */
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u_int8_t *ni_wpa_ie; /* captured WPA/RSN ie */
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u_int8_t *ni_wme_ie; /* captured WME ie */
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u_int16_t ni_txseqs[17]; /* tx seq per-tid */
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u_int16_t ni_rxseqs[17]; /* rx seq previous per-tid*/
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u_int32_t ni_rxfragstamp; /* time stamp of last rx frag */
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struct mbuf *ni_rxfrag[3]; /* rx frag reassembly */
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struct ieee80211_rsnparms ni_rsn; /* RSN/WPA parameters */
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struct ieee80211_key ni_ucastkey; /* unicast key */
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/* hardware */
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u_int32_t ni_rstamp; /* recv timestamp */
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u_int8_t ni_rssi; /* recv ssi */
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/* header */
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u_int8_t ni_macaddr[IEEE80211_ADDR_LEN];
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u_int8_t ni_bssid[IEEE80211_ADDR_LEN];
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/* beacon, probe response */
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union {
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u_int8_t data[8];
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u_int64_t tsf;
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} ni_tstamp; /* from last rcv'd beacon */
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u_int16_t ni_intval; /* beacon interval */
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u_int16_t ni_capinfo; /* capabilities */
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u_int8_t ni_esslen;
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u_int8_t ni_essid[IEEE80211_NWID_LEN];
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struct ieee80211_rateset ni_rates; /* negotiated rate set */
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struct ieee80211_channel *ni_chan;
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u_int16_t ni_fhdwell; /* FH only */
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u_int8_t ni_fhindex; /* FH only */
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u_int8_t ni_erp; /* ERP from beacon/probe resp */
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u_int16_t ni_timoff; /* byte offset to TIM ie */
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u_int8_t ni_dtim_period; /* DTIM period */
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u_int8_t ni_dtim_count; /* DTIM count for last bcn */
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/* others */
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int ni_fails; /* failure count to associate */
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short ni_inact; /* inactivity mark count */
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short ni_inact_reload;/* inactivity reload value */
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int ni_txrate; /* index to ni_rates[] */
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struct ifqueue ni_savedq; /* ps-poll queue */
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struct ieee80211_nodestats ni_stats; /* per-node statistics */
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};
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MALLOC_DECLARE(M_80211_NODE);
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#define IEEE80211_NODE_AID(ni) IEEE80211_AID(ni->ni_associd)
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#define IEEE80211_NODE_STAT(ni,stat) (ni->ni_stats.ns_##stat++)
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#define IEEE80211_NODE_STAT_ADD(ni,stat,v) (ni->ni_stats.ns_##stat += v)
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#define IEEE80211_NODE_STAT_SET(ni,stat,v) (ni->ni_stats.ns_##stat = v)
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static __inline struct ieee80211_node *
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ieee80211_ref_node(struct ieee80211_node *ni)
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{
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ieee80211_node_incref(ni);
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return ni;
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}
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static __inline void
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ieee80211_unref_node(struct ieee80211_node **ni)
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{
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ieee80211_node_decref(*ni);
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*ni = NULL; /* guard against use */
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}
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struct ieee80211com;
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void ieee80211_node_attach(struct ieee80211com *);
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void ieee80211_node_lateattach(struct ieee80211com *);
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void ieee80211_node_detach(struct ieee80211com *);
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static __inline int
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ieee80211_node_is_authorized(const struct ieee80211_node *ni)
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{
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return (ni->ni_flags & IEEE80211_NODE_AUTH);
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}
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void ieee80211_node_authorize(struct ieee80211com *,
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struct ieee80211_node *);
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void ieee80211_node_unauthorize(struct ieee80211com *,
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struct ieee80211_node *);
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void ieee80211_begin_scan(struct ieee80211com *, int);
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int ieee80211_next_scan(struct ieee80211com *);
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void ieee80211_create_ibss(struct ieee80211com*, struct ieee80211_channel *);
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void ieee80211_reset_bss(struct ieee80211com *);
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void ieee80211_cancel_scan(struct ieee80211com *);
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void ieee80211_end_scan(struct ieee80211com *);
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int ieee80211_ibss_merge(struct ieee80211com *, struct ieee80211_node *);
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int ieee80211_sta_join(struct ieee80211com *, struct ieee80211_node *);
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void ieee80211_sta_leave(struct ieee80211com *, struct ieee80211_node *);
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/*
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* Table of ieee80211_node instances. Each ieee80211com
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* has at least one for holding the scan candidates.
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* When operating as an access point or in ibss mode there
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* is a second table for associated stations or neighbors.
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*/
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struct ieee80211_node_table {
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struct ieee80211com *nt_ic; /* back reference */
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ieee80211_node_lock_t nt_nodelock; /* on node table */
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TAILQ_HEAD(, ieee80211_node) nt_node; /* information of all nodes */
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LIST_HEAD(, ieee80211_node) nt_hash[IEEE80211_NODE_HASHSIZE];
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const char *nt_name; /* for debugging */
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ieee80211_scan_lock_t nt_scanlock; /* on nt_scangen */
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u_int nt_scangen; /* gen# for timeout scan */
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int nt_inact_timer; /* inactivity timer */
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int nt_inact_init; /* initial node inact setting */
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void (*nt_timeout)(struct ieee80211_node_table *);
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};
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void ieee80211_node_table_reset(struct ieee80211_node_table *);
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struct ieee80211_node *ieee80211_alloc_node(
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struct ieee80211_node_table *, const u_int8_t *);
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struct ieee80211_node *ieee80211_dup_bss(struct ieee80211_node_table *,
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const u_int8_t *);
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#ifdef IEEE80211_DEBUG_REFCNT
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void ieee80211_free_node_debug(struct ieee80211_node *,
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const char *func, int line);
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struct ieee80211_node *ieee80211_find_node_debug(
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struct ieee80211_node_table *, const u_int8_t *,
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const char *func, int line);
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struct ieee80211_node * ieee80211_find_rxnode_debug(
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struct ieee80211com *, const struct ieee80211_frame_min *,
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const char *func, int line);
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struct ieee80211_node *ieee80211_find_txnode_debug(
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struct ieee80211com *, const u_int8_t *,
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const char *func, int line);
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struct ieee80211_node *ieee80211_find_node_with_channel_debug(
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struct ieee80211_node_table *, const u_int8_t *macaddr,
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struct ieee80211_channel *, const char *func, int line);
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struct ieee80211_node *ieee80211_find_node_with_ssid_debug(
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struct ieee80211_node_table *, const u_int8_t *macaddr,
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u_int ssidlen, const u_int8_t *ssid,
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const char *func, int line);
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#define ieee80211_free_node(ni) \
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ieee80211_free_node_debug(ni, __func__, __LINE__)
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#define ieee80211_find_node(nt, mac) \
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ieee80211_find_node_debug(nt, mac, __func__, __LINE__)
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#define ieee80211_find_rxnode(nt, wh) \
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ieee80211_find_rxnode_debug(nt, wh, __func__, __LINE__)
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#define ieee80211_find_txnode(nt, mac) \
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ieee80211_find_txnode_debug(nt, mac, __func__, __LINE__)
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#define ieee80211_find_node_with_channel(nt, mac, c) \
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ieee80211_find_node_with_channel_debug(nt, mac, c, __func__, __LINE__)
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#define ieee80211_find_node_with_ssid(nt, mac, sl, ss) \
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ieee80211_find_node_with_ssid_debug(nt, mac, sl, ss, __func__, __LINE__)
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#else
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void ieee80211_free_node(struct ieee80211_node *);
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struct ieee80211_node *ieee80211_find_node(
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struct ieee80211_node_table *, const u_int8_t *);
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struct ieee80211_node * ieee80211_find_rxnode(
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struct ieee80211com *, const struct ieee80211_frame_min *);
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struct ieee80211_node *ieee80211_find_txnode(
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struct ieee80211com *, const u_int8_t *);
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struct ieee80211_node *ieee80211_find_node_with_channel(
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struct ieee80211_node_table *, const u_int8_t *macaddr,
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struct ieee80211_channel *);
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struct ieee80211_node *ieee80211_find_node_with_ssid(
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struct ieee80211_node_table *, const u_int8_t *macaddr,
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u_int ssidlen, const u_int8_t *ssid);
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#endif
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typedef void ieee80211_iter_func(void *, struct ieee80211_node *);
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void ieee80211_iterate_nodes(struct ieee80211_node_table *,
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ieee80211_iter_func *, void *);
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void ieee80211_dump_node(struct ieee80211_node_table *,
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struct ieee80211_node *);
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void ieee80211_dump_nodes(struct ieee80211_node_table *);
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struct ieee80211_node *ieee80211_fakeup_adhoc_node(
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struct ieee80211_node_table *, const u_int8_t macaddr[]);
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void ieee80211_node_join(struct ieee80211com *, struct ieee80211_node *,int);
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void ieee80211_node_leave(struct ieee80211com *, struct ieee80211_node *);
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u_int8_t ieee80211_getrssi(struct ieee80211com *ic);
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#endif /* _NET80211_IEEE80211_NODE_H_ */
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