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madwifi/net80211/ieee80211_node.h

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/*-
* 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 <net80211/ieee80211_var.h>
#include <net80211/ieee80211_ioctl.h> /* for ieee80211_nodestats */
#include <net80211/ieee80211_proto.h> /* 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 /* Compression 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 separately. Thus, we do not need to lock the following
* 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_ */
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