/*- * Copyright (c) 2001 Atsushi Onoe * Copyright (c) 2002-2005 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. * * $Id$ */ #ifndef _NET80211_IEEE80211_NODE_H_ #define _NET80211_IEEE80211_NODE_H_ #include #include /* for ieee80211_nodestats */ #include /* for proto macros on node */ /* * Each ieee80211com instance has a single timer that fires once a * second. This is used to initiate various work depending on the * state of the instance: scanning (passive or active), ``transition'' * (waiting for a response to a management frame when operating * as a station), and node inactivity processing (when operating * as an AP). For inactivity processing each node has a timeout * set in its ni_inact field that is decremented on each timeout * and the node is reclaimed when the counter goes to zero. We * use different inactivity timeout values depending on whether * the node is associated and authorized (either by 802.1x or * open/shared key authentication) or associated but yet to be * authorized. The latter timeout is shorter to more aggressively * reclaim nodes that leave part way through the 802.1x exchange. */ #define IEEE80211_INACT_WAIT 15 /* inactivity interval (secs) */ #define IEEE80211_INACT_INIT (30/IEEE80211_INACT_WAIT) /* initial */ #define IEEE80211_INACT_AUTH (180/IEEE80211_INACT_WAIT) /* associated but not authorized */ #define IEEE80211_INACT_RUN (300/IEEE80211_INACT_WAIT) /* authorized */ #define IEEE80211_INACT_PROBE (30/IEEE80211_INACT_WAIT) /* probe */ #define IEEE80211_INACT_SCAN (300/IEEE80211_INACT_WAIT) /* scanned */ #define IEEE80211_TRANS_WAIT 5 /* mgt frame tx timer (secs) */ #define IEEE80211_NODE_HASHSIZE 32 /* simple hash is enough for variation of macaddr */ #define IEEE80211_NODE_HASH(addr) \ (((const u_int8_t *)(addr))[IEEE80211_ADDR_LEN - 1] % \ IEEE80211_NODE_HASHSIZE) struct ieee80211_rsnparms { u_int8_t rsn_mcastcipher; /* mcast/group cipher */ u_int8_t rsn_mcastkeylen; /* mcast key length */ u_int8_t rsn_ucastcipherset; /* unicast cipher set */ u_int8_t rsn_ucastcipher; /* selected unicast cipher */ u_int8_t rsn_ucastkeylen; /* unicast key length */ u_int8_t rsn_keymgmtset; /* key management algorithms */ u_int8_t rsn_keymgmt; /* selected key mgmt algo */ u_int16_t rsn_caps; /* capabilities */ }; struct ieee80211_node_table; struct ieee80211com; struct ieee80211vap; struct ath_buf; struct ath_softc; /* * Node specific information. Note that drivers are expected * to derive from this structure to add device-specific per-node * state. This is done by overriding the ic_node_* methods in * the ieee80211com structure. */ struct ieee80211_node { struct ieee80211vap *ni_vap; struct ieee80211com *ni_ic; struct ieee80211_node_table *ni_table; TAILQ_ENTRY(ieee80211_node) ni_list; LIST_ENTRY(ieee80211_node) ni_hash; atomic_t ni_refcnt; u_int ni_scangen; /* gen# for timeout scan */ u_int8_t ni_authmode; /* authentication algorithm */ u_int16_t ni_flags; /* special-purpose state */ #define IEEE80211_NODE_AUTH 0x0001 /* authorized for data */ #define IEEE80211_NODE_QOS 0x0002 /* QoS enabled */ #define IEEE80211_NODE_ERP 0x0004 /* ERP enabled */ /* NB: this must have the same value as IEEE80211_FC1_PWR_MGT */ #define IEEE80211_NODE_PWR_MGT 0x0010 /* power save mode enabled */ #define IEEE80211_NODE_AREF 0x0020 /* authentication ref held */ #define IEEE80211_NODE_UAPSD 0x0040 /* U-APSD power save enabled */ #define IEEE80211_NODE_UAPSD_TRIG 0x0080 /* U-APSD triggerable state */ #define IEEE80211_NODE_UAPSD_SP 0x0100 /* U-APSD SP in progress */ #define IEEE80211_NODE_PS_CHANGED 0x0200 /* PS state change */ u_int8_t ni_ath_flags; /* Atheros feature flags */ /* NB: These must have the same values as IEEE80211_ATHC_* */ #define IEEE80211_NODE_TURBOP 0x0001 /* Turbo prime enable */ #define IEEE80211_NODE_COMP 0x0002 /* Compresssion enable */ #define IEEE80211_NODE_FF 0x0004 /* Fast Frame capable */ #define IEEE80211_NODE_XR 0x0008 /* Atheros WME enable */ #define IEEE80211_NODE_AR 0x0010 /* AR capable */ #define IEEE80211_NODE_BOOST 0x0080 u_int16_t ni_ath_defkeyindex; /* Atheros def key index */ #define IEEE80211_INVAL_DEFKEY 0x7FFF u_int16_t ni_associd; /* assoc response */ u_int16_t ni_txpower; /* current transmit power (in 0.5 dBm) */ u_int16_t ni_vlan; /* vlan tag */ u_int32_t *ni_challenge; /* shared-key challenge */ u_int8_t *ni_wpa_ie; /* captured WPA ie */ u_int8_t *ni_rsn_ie; /* captured RSN ie */ u_int8_t *ni_wme_ie; /* captured WME ie */ u_int8_t *ni_ath_ie; /* captured Atheros ie */ u_int8_t *ni_suppchans; /* supported channels */ u_int8_t *ni_suppchans_new; /* supported channels of ongoing association */ u_int8_t *ni_needed_chans; /* nodes which don't support these will be removed */ u_int8_t ni_n_needed_chans; /* size of ni_needed_chans list */ u_int16_t ni_txseqs[17]; /* tx seq per-tid */ u_int16_t ni_rxseqs[17]; /* rx seq previous per-tid */ unsigned long ni_rxfragstamp; /* time stamp of last rx frag */ struct sk_buff *ni_rxfrag; /* rx frag reassembly */ struct ieee80211_rsnparms ni_rsn; /* RSN/WPA parameters */ struct ieee80211_key ni_ucastkey; /* unicast key */ int ni_rxkeyoff; /* Receive key offset */ /* hardware */ u_int64_t ni_rtsf; /* recv timestamp */ unsigned long ni_last_rx; /* recv jiffies */ u_int8_t ni_rssi; /* recv ssi */ /* header */ u_int8_t ni_macaddr[IEEE80211_ADDR_LEN]; u_int8_t ni_bssid[IEEE80211_ADDR_LEN]; /* beacon, probe response */ union { u_int8_t data[8]; __le64 tsf; } ni_tstamp; /* from last rcv'd beacon */ u_int16_t ni_intval; /* beacon interval */ u_int16_t ni_intval_old; /* beacon interval before first change */ u_int16_t ni_intval_cnt; /* count of ni_intval != ni_intval_old */ unsigned long ni_intval_end; /* end of transition interval jiffies */ u_int16_t ni_capinfo; /* capabilities */ u_int8_t ni_esslen; u_int8_t ni_essid[IEEE80211_NWID_LEN]; struct ieee80211_rateset ni_rates; /* negotiated rate set */ struct ieee80211_channel *ni_chan; u_int16_t ni_fhdwell; /* FH only */ u_int8_t ni_fhindex; /* FH only */ u_int8_t ni_erp; /* ERP from beacon/probe resp */ u_int16_t ni_timoff; /* byte offset to TIM ie */ /* others */ struct sk_buff_head ni_savedq; /* packets queued for pspoll */ short ni_inact; /* inactivity mark count */ short ni_inact_reload; /* inactivity reload value */ int ni_txrate; /* index to ni_rates[] */ struct ieee80211_nodestats ni_stats; /* per-node statistics */ struct ieee80211vap *ni_prev_vap; /* previously associated vap */ u_int8_t ni_uapsd; /* U-APSD per-node flags matching WMM STA Qos Info field */ u_int8_t ni_uapsd_maxsp; /* maxsp from flags above */ u_int16_t ni_uapsd_trigseq[WME_NUM_AC]; /* trigger suppression on retry */ __le16 ni_pschangeseq; }; MALLOC_DECLARE(M_80211_NODE); #define IEEE80211_NODE_AID(ni) IEEE80211_AID(ni->ni_associd) #define IEEE80211_NODE_STAT(ni,stat) (ni->ni_stats.ns_##stat++) #define IEEE80211_NODE_STAT_ADD(ni,stat,v) (ni->ni_stats.ns_##stat += v) #define IEEE80211_NODE_STAT_SET(ni,stat,v) (ni->ni_stats.ns_##stat = v) #define WME_UAPSD_AC_CAN_TRIGGER(_ac, _ni) ( \ ((_ni)->ni_flags & IEEE80211_NODE_UAPSD_TRIG) && \ WME_UAPSD_AC_ENABLED((_ac), (_ni)->ni_uapsd)) #define WME_UAPSD_NODE_MAXQDEPTH 8 #define IEEE80211_NODE_UAPSD_USETIM(_ni) (((_ni)->ni_uapsd & 0xF) == 0xF) #define WME_UAPSD_NODE_INVALIDSEQ 0xffff #define WME_UAPSD_NODE_TRIGSEQINIT(_ni) \ (memset(&(_ni)->ni_uapsd_trigseq[0], \ 0xff, sizeof((_ni)->ni_uapsd_trigseq))) void ieee80211_node_attach(struct ieee80211com *); void ieee80211_node_detach(struct ieee80211com *); void ieee80211_node_vattach(struct ieee80211vap *); void ieee80211_node_latevattach(struct ieee80211vap *); void ieee80211_node_vdetach(struct ieee80211vap *); static __inline int ieee80211_node_is_authorized(const struct ieee80211_node *ni) { return (ni->ni_flags & IEEE80211_NODE_AUTH); } void ieee80211_node_authorize(struct ieee80211_node *); void ieee80211_node_unauthorize(struct ieee80211_node *); void ieee80211_create_ibss(struct ieee80211vap *, struct ieee80211_channel *); void ieee80211_reset_bss(struct ieee80211vap *); int ieee80211_ibss_merge(struct ieee80211_node *); struct ieee80211_scan_entry; int ieee80211_sta_join(struct ieee80211vap *, const struct ieee80211_scan_entry *); void ieee80211_sta_join1_tasklet(IEEE80211_TQUEUE_ARG); void ieee80211_sta_leave(struct ieee80211_node *); #define WDS_AGING_TIME 600 /* 10 minutes */ #define WDS_AGING_COUNT 2 #define WDS_AGING_STATIC 0xffff #define WDS_AGING_TIMER_VAL (WDS_AGING_TIME / 2) struct ieee80211_wds_addr { LIST_ENTRY(ieee80211_wds_addr) wds_hash; u_int8_t wds_macaddr[IEEE80211_ADDR_LEN]; struct ieee80211_node *wds_ni; u_int16_t wds_agingcount; }; /* * Table of ieee80211_node instances. Each ieee80211com * has at least one for holding the scan candidates. * When operating as an access point or in ibss mode there * is a second table for associated stations or neighbors. */ struct ieee80211_node_table { const char *nt_name; /* for debugging */ struct ieee80211com *nt_ic; /* back reference */ ieee80211_node_table_lock_t nt_nodelock; /* on node table */ TAILQ_HEAD(, ieee80211_node) nt_node; /* information of all nodes */ ATH_LIST_HEAD(, ieee80211_node) nt_hash[IEEE80211_NODE_HASHSIZE]; ATH_LIST_HEAD(, ieee80211_wds_addr) nt_wds_hash[IEEE80211_NODE_HASHSIZE]; ieee80211_scan_lock_t nt_scanlock; /* on nt_scangen */ u_int nt_scangen; /* gen# for timeout scan */ int nt_inact_init; /* initial node inact setting */ struct timer_list nt_wds_aging_timer; /* timer to age out wds entries */ }; /* Allocates a new ieee80211_node * that has a reference count of one, and * adds it to the node table. */ struct ieee80211_node *ieee80211_alloc_node_table(struct ieee80211vap *, const u_int8_t *); /* Allocates a new ieee80211_node * that has a reference count. * If tmp is 0, it is added to the node table and the reference is used. * If tmp is 1, then the caller gets to use the reference. */ struct ieee80211_node *ieee80211_dup_bss(struct ieee80211vap *, const u_int8_t *, unsigned char tmp); void ieee80211_node_reset(struct ieee80211_node *, struct ieee80211vap *); /* The following return node reference that the caller must manage. */ struct ieee80211_node *ieee80211_find_node(struct ieee80211_node_table *, const u_int8_t *); struct ieee80211_node *ieee80211_find_rxnode(struct ieee80211com *, const struct ieee80211_frame_min *); struct ieee80211_node *ieee80211_find_txnode(struct ieee80211vap *, const u_int8_t *); /* Reference counting only needs to be locked out against the transitions, * 0->1 and 1->0 (i.e., when we do not own the reference we are getting). * This only happens when finding the a node reference from the node table, * which is locked seperately. Thus, we do not need to lock the follwoing * functions. * Increment the reference counter for ieee80211_node *. */ struct ieee80211_node *ieee80211_ref_node(struct ieee80211_node *ni); #define PASS_NODE(_ni) \ ieee80211_pass_node(&_ni) static __inline struct ieee80211_node * ieee80211_pass_node(struct ieee80211_node **pni) { struct ieee80211_node *tmp = *pni; *pni = NULL; return (tmp); } void ieee80211_unref_node(struct ieee80211_node **pni); /* Increments reference count of ieee80211_node *ni */ int ieee80211_add_wds_addr(struct ieee80211_node_table *, struct ieee80211_node *, const u_int8_t *, u_int8_t); /* Decrements reference count of ieee80211_node *ni */ void ieee80211_remove_wds_addr(struct ieee80211_node_table *, const u_int8_t *); /* Decrements reference count of node, if found */ void ieee80211_del_wds_node(struct ieee80211_node_table *, struct ieee80211_node *); /* Increments reference count of node, if found */ struct ieee80211_node *ieee80211_find_wds_node(struct ieee80211_node_table *, const u_int8_t *); typedef void ieee80211_iter_func(void *, struct ieee80211_node *); void ieee80211_iterate_nodes(struct ieee80211_node_table *, ieee80211_iter_func *, void *); void ieee80211_iterate_dev_nodes(struct net_device *, struct ieee80211_node_table *, ieee80211_iter_func *, void *); void ieee80211_dump_node(struct ieee80211_node_table *, struct ieee80211_node *); void ieee80211_dump_nodes(struct ieee80211_node_table *); /* Returns a node with refcount of one. Caller must release that reference */ struct ieee80211_node *ieee80211_fakeup_adhoc_node(struct ieee80211vap *, const u_int8_t macaddr[]); struct ieee80211_scanparams; /* Returns a node with refcount of one. Caller must release that reference */ struct ieee80211_node *ieee80211_add_neighbor(struct ieee80211vap *, const struct ieee80211_frame *, const struct ieee80211_scanparams *); /* Increments reference count of node */ void ieee80211_node_join(struct ieee80211_node *, int); /* Decrements reference count of node */ void ieee80211_node_leave(struct ieee80211_node *); u_int8_t ieee80211_getrssi(struct ieee80211com *); int32_t ieee80211_get_node_count(struct ieee80211com *); #endif /* _NET80211_IEEE80211_NODE_H_ */