Aren/NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
ea155978ee
NetBSD/sys/net80211/ieee80211_node.h
mycroft 88a8480ea3 Implement passive scanning for APs in station and host-AP mode: 
ieee80211_input():
  * Do not discard management frames in station mode just because they have
    the wrong BSSID.
  * Do not discard beacons in station and host-AP mode when not scanning.
  * Some minor rearrangement.  Update node statistics even if the packet is
    rejected.
  ieee80211_recv_mgmt():
  * Accept probe responses and beacons in station and host-AP even when not
    scanning.
  * Do not immediately free the node created by a beacon or probe response.
XXX Should I check BSSIDs more carefully in ieee80211_recv_mgmt() --
specifically for ASSOC_RESP, REASSOC_RESP, AUTH, DEAUTH and DISASSOC?

Fix a problem with APs that advertise multiple SSIDs:
Change the footprint of ieee80211_find_node_with_channel() to take a SSID as
well, and, if not empty, compared it with the existing nodes.  This causes
us to allocate multiple nodes for the same AP.  Without this we were only
leaving one SSID in the node table, which might not be the desired one, and
so the interface would fail to fully initialize.  (Reported by he@ with a
Cisco 350 AP.)
2004-07-29 22:28:05 +00:00

207 lines
7.0 KiB
C
Raw Blame History

/* $NetBSD: ieee80211_node.h,v 1.13 2004/07/29 22:28:05 mycroft Exp $ */
/*-
* Copyright (c) 2001 Atsushi Onoe
* Copyright (c) 2002, 2003 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.
*
* $FreeBSD: src/sys/net80211/ieee80211_node.h,v 1.10 2004/04/05 22:10:26 sam Exp $
*/
#ifndef _NET80211_IEEE80211_NODE_H_
#define _NET80211_IEEE80211_NODE_H_
#ifdef _KERNEL
#define IEEE80211_PSCAN_WAIT 5 /* passive scan wait */
#define IEEE80211_TRANS_WAIT 5 /* transition wait */
#define IEEE80211_INACT_WAIT 5 /* inactivity timer interval */
#define IEEE80211_INACT_MAX (300/IEEE80211_INACT_WAIT)
#define IEEE80211_NODE_HASHSIZE 32
/* simple hash is enough for variation of macaddr */
#define IEEE80211_NODE_HASH(addr) \
(((u_int8_t *)(addr))[IEEE80211_ADDR_LEN - 1] % IEEE80211_NODE_HASHSIZE)
#endif /* _KERNEL */
#define IEEE80211_RATE_SIZE 8 /* 802.11 standard */
#define IEEE80211_RATE_MAXSIZE 15 /* max rates we'll handle */
struct ieee80211_rateset {
u_int8_t rs_nrates;
u_int8_t rs_rates[IEEE80211_RATE_MAXSIZE];
};
#ifdef _KERNEL
/*
* 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 {
TAILQ_ENTRY(ieee80211_node) ni_list;
LIST_ENTRY(ieee80211_node) ni_hash;
u_int ni_refcnt;
u_int ni_scangen; /* gen# for timeout scan */
/* hardware */
u_int32_t ni_rstamp; /* recv timestamp */
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 */
u_int8_t ni_tstamp[8]; /* from last rcv'd beacon */
u_int16_t ni_intval; /* beacon interval */
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 */
u_int8_t *ni_country; /* country information XXX */
struct ieee80211_channel *ni_chan;
u_int16_t ni_fhdwell; /* FH only */
u_int8_t ni_fhindex; /* FH only */
u_int8_t ni_erp; /* 11g only */
#ifdef notyet
/* DTIM and contention free period (CFP) */
u_int8_t ni_dtimperiod;
u_int8_t ni_cfpperiod; /* # of DTIMs between CFPs */
u_int16_t ni_cfpduremain; /* remaining cfp duration */
u_int16_t ni_cfpmaxduration;/* max CFP duration in TU */
u_int16_t ni_nextdtim; /* time to next DTIM */
u_int16_t ni_timoffset;
#endif
/* power saving mode */
u_int8_t ni_pwrsave;
struct ifqueue ni_savedq; /* packets queued for pspoll */
/* others */
u_int16_t ni_associd; /* assoc response */
u_int16_t ni_txseq; /* seq to be transmitted */
u_int16_t ni_rxseq; /* seq previous received */
int ni_fails; /* failure count to associate */
int ni_inact; /* inactivity mark count */
int ni_txrate; /* index to ni_rates[] */
u_int32_t *ni_challenge; /* shared-key challenge */
};
#ifdef __NetBSD__
#define ieee80211_node_incref(ni) \
do { \
int _s = splnet(); \
(ni)->ni_refcnt++; \
splx(_s); \
} while (0)
static __inline int
ieee80211_node_decref(struct ieee80211_node *ni)
{
int refcnt, s;
s = splnet();
refcnt = --ni->ni_refcnt;
splx(s);
return refcnt;
}
#else
#define ieee80211_node_incref(ni) atomic_add_int(&(ni)->ni_refcnt, 1)
static __inline int
ieee80211_node_decref(struct ieee80211_node *ni)
{
int orefcnt;
do {
orefcnt = ni->ni_refcnt;
} while (atomic_cmpset_int(&ni->ni_refcnt, orefcnt, orefcnt - 1) == 0);
return orefcnt - 1;
}
#endif
static __inline struct ieee80211_node *
ieee80211_ref_node(struct ieee80211_node *ni)
{
ieee80211_node_incref(ni);
return ni;
}
static __inline void
ieee80211_unref_node(struct ieee80211_node **ni)
{
ieee80211_node_decref(*ni);
*ni = NULL; /* guard against use */
}
struct ieee80211com;
#ifdef MALLOC_DECLARE
MALLOC_DECLARE(M_80211_NODE);
#endif
extern void ieee80211_node_attach(struct ieee80211com *);
extern void ieee80211_node_lateattach(struct ieee80211com *);
extern void ieee80211_node_detach(struct ieee80211com *);
extern void ieee80211_begin_scan(struct ieee80211com *);
extern void ieee80211_next_scan(struct ieee80211com *);
extern void ieee80211_create_ibss(struct ieee80211com *,
struct ieee80211_channel *);
extern void ieee80211_end_scan(struct ieee80211com *);
extern struct ieee80211_node *ieee80211_alloc_node(struct ieee80211com *,
u_int8_t *);
extern struct ieee80211_node *ieee80211_dup_bss(struct ieee80211com *,
u_int8_t *);
extern struct ieee80211_node *ieee80211_find_node(struct ieee80211com *,
u_int8_t *);
extern struct ieee80211_node *ieee80211_find_rxnode(struct ieee80211com *,
struct ieee80211_frame *);
extern struct ieee80211_node *ieee80211_find_txnode(struct ieee80211com *,
u_int8_t *);
extern struct ieee80211_node *ieee80211_find_node_for_beacon(
struct ieee80211com *, u_int8_t *macaddr,
struct ieee80211_channel *, char *ssid);
extern void ieee80211_free_node(struct ieee80211com *,
struct ieee80211_node *);
extern void ieee80211_free_allnodes(struct ieee80211com *);
typedef void ieee80211_iter_func(void *, struct ieee80211_node *);
extern void ieee80211_iterate_nodes(struct ieee80211com *ic,
ieee80211_iter_func *, void *);
extern void ieee80211_timeout_nodes(struct ieee80211com *);
extern void ieee80211_node_join(struct ieee80211com *,
struct ieee80211_node *, int);
extern void ieee80211_node_leave(struct ieee80211com *,
struct ieee80211_node *);
extern int ieee80211_match_bss(struct ieee80211com *, struct ieee80211_node *);
#endif /* _KERNEL */
#endif /* _NET80211_IEEE80211_NODE_H_ */
Reference in New Issue View Git Blame Copy Permalink