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//------------------------------------------------------------------------------
// <copyright file="ieee80211_node.h" company="Atheros">
// Copyright (c) 2004-2010 Atheros Corporation. All rights reserved.
//
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
//
//
//------------------------------------------------------------------------------
//==============================================================================
// Author(s): ="Atheros"
//==============================================================================
#ifndef _IEEE80211_NODE_H_
#define _IEEE80211_NODE_H_
/*
* Node locking definitions.
*/
#define IEEE80211_NODE_LOCK_INIT(_nt) A_MUTEX_INIT(&(_nt)->nt_nodelock)
#define IEEE80211_SCAN_REPORT_LOCK_INIT(_nt) A_MUTEX_INIT(&(_nt)->nt_scanReportLock)
#define IEEE80211_NODE_LOCK_DESTROY(_nt) if (A_IS_MUTEX_VALID(&(_nt)->nt_nodelock)) { \
A_MUTEX_DELETE(&(_nt)->nt_nodelock); }
#define IEEE80211_SCAN_REPORT_LOCK_DESTROY(_nt) if (A_IS_MUTEX_VALID(&(_nt)->nt_scanReportLock)) { \
A_MUTEX_DELETE(&(_nt)->nt_scanReportLock); }
#define IEEE80211_NODE_LOCK(_nt) A_MUTEX_LOCK(&(_nt)->nt_nodelock)
#define IEEE80211_NODE_UNLOCK(_nt) A_MUTEX_UNLOCK(&(_nt)->nt_nodelock)
#define IEEE80211_SCAN_REPORT_LOCK(_nt) A_MUTEX_LOCK(&(_nt)->nt_scanReportLock)
#define IEEE80211_SCAN_REPORT_UNLOCK(_nt) A_MUTEX_UNLOCK(&(_nt)->nt_scanReportLock)
#define IEEE80211_NODE_LOCK_BH(_nt) A_MUTEX_LOCK(&(_nt)->nt_nodelock)
#define IEEE80211_NODE_UNLOCK_BH(_nt) A_MUTEX_UNLOCK(&(_nt)->nt_nodelock)
#define IEEE80211_NODE_LOCK_ASSERT(_nt)
/*
* Node reference counting definitions.
*
* ieee80211_node_initref initialize the reference count to 1
* ieee80211_node_incref add a reference
* ieee80211_node_decref remove a reference
* ieee80211_node_dectestref remove a reference and return 1 if this
* is the last reference, otherwise 0
* ieee80211_node_refcnt reference count for printing (only)
*/
#define ieee80211_node_initref(_ni) ((_ni)->ni_refcnt = 1)
#define ieee80211_node_incref(_ni) ((_ni)->ni_refcnt++)
#define ieee80211_node_decref(_ni) ((_ni)->ni_refcnt--)
#define ieee80211_node_dectestref(_ni) (((_ni)->ni_refcnt--) == 1)
#define ieee80211_node_refcnt(_ni) ((_ni)->ni_refcnt)
#define IEEE80211_NODE_HASHSIZE 32
/* simple hash is enough for variation of macaddr */
#define IEEE80211_NODE_HASH(addr) \
(((const A_UINT8 *)(addr))[IEEE80211_ADDR_LEN - 1] % \
IEEE80211_NODE_HASHSIZE)
/*
* 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 {
void *nt_wmip; /* back reference */
A_MUTEX_T nt_nodelock; /* on node table */
struct bss *nt_node_first; /* information of all nodes */
struct bss *nt_node_last; /* information of all nodes */
struct bss *nt_hash[IEEE80211_NODE_HASHSIZE];
const char *nt_name; /* for debugging */
A_UINT32 nt_scangen; /* gen# for timeout scan */
A_UINT32 nt_nodeAge; /* node aging time */
#ifdef OS_ROAM_MANAGEMENT
A_UINT32 nt_si_gen; /* gen# for scan indication*/
#endif
A_MUTEX_T nt_scanReportLock; /* to synchronize between scan ioctl and bssinfo event */
};
#define WLAN_NODE_INACT_TIMEOUT_MSEC 120000
#define WLAN_NODE_INACT_CNT 4
#endif /* _IEEE80211_NODE_H_ */