372 lines
9.5 KiB
C
372 lines
9.5 KiB
C
/*-
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* Copyright (c) 2001 Atsushi Onoe
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* Copyright (c) 2002-2004 Sam Leffler, Errno Consulting
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* Copyright (c) 2004-2005 Atheros Communications
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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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* $Id: //depot/sw/releases/olca2.0-GPL/host/wlan/src/wlan_node.c#1 $
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*/
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/*
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* IEEE 802.11 node handling support.
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*/
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#include <a_config.h>
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#include <athdefs.h>
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#include <a_types.h>
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#include <a_osapi.h>
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#include <a_debug.h>
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#include <ieee80211.h>
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#include <wlan_api.h>
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#include <ieee80211_node.h>
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#include <htc_api.h>
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#include <wmi.h>
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#include <wmi_api.h>
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static void wlan_node_timeout(A_ATH_TIMER arg);
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static bss_t * _ieee80211_find_node(struct ieee80211_node_table *nt,
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const A_UINT8 *macaddr);
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bss_t *
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wlan_node_alloc(struct ieee80211_node_table *nt, int wh_size)
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{
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bss_t *ni;
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ni = A_MALLOC_NOWAIT(sizeof(bss_t));
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if (ni != NULL) {
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ni->ni_buf = A_MALLOC_NOWAIT(wh_size);
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if (ni->ni_buf == NULL) {
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A_FREE(ni);
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ni = NULL;
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return ni;
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}
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} else {
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return ni;
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}
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/* Make sure our lists are clean */
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ni->ni_list_next = NULL;
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ni->ni_list_prev = NULL;
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ni->ni_hash_next = NULL;
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ni->ni_hash_prev = NULL;
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//
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// ni_scangen never initialized before and during suspend/resume of winmobile, customer (LG/SEMCO) identified
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// that some junk has been stored in this, due to this scan list didn't properly updated
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//
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ni->ni_scangen = 0;
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return ni;
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}
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void
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wlan_node_free(bss_t *ni)
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{
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if (ni->ni_buf != NULL) {
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A_FREE(ni->ni_buf);
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}
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A_FREE(ni);
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}
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void
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wlan_setup_node(struct ieee80211_node_table *nt, bss_t *ni,
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const A_UINT8 *macaddr)
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{
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int hash;
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A_MEMCPY(ni->ni_macaddr, macaddr, IEEE80211_ADDR_LEN);
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hash = IEEE80211_NODE_HASH(macaddr);
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ieee80211_node_initref(ni); /* mark referenced */
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ni->ni_tstamp = A_GET_MS(WLAN_NODE_INACT_TIMEOUT_MSEC);
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IEEE80211_NODE_LOCK_BH(nt);
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/* Insert at the end of the node list */
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ni->ni_list_next = NULL;
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ni->ni_list_prev = nt->nt_node_last;
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if(nt->nt_node_last != NULL)
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{
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nt->nt_node_last->ni_list_next = ni;
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}
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nt->nt_node_last = ni;
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if(nt->nt_node_first == NULL)
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{
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nt->nt_node_first = ni;
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}
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/* Insert into the hash list i.e. the bucket */
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if((ni->ni_hash_next = nt->nt_hash[hash]) != NULL)
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{
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nt->nt_hash[hash]->ni_hash_prev = ni;
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}
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ni->ni_hash_prev = NULL;
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nt->nt_hash[hash] = ni;
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if (!nt->isTimerArmed) {
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A_TIMEOUT_MS(&nt->nt_inact_timer, WLAN_NODE_INACT_TIMEOUT_MSEC, 0);
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nt->isTimerArmed = TRUE;
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}
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IEEE80211_NODE_UNLOCK_BH(nt);
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}
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static bss_t *
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_ieee80211_find_node(struct ieee80211_node_table *nt,
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const A_UINT8 *macaddr)
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{
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bss_t *ni;
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int hash;
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IEEE80211_NODE_LOCK_ASSERT(nt);
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hash = IEEE80211_NODE_HASH(macaddr);
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for(ni = nt->nt_hash[hash]; ni; ni = ni->ni_hash_next) {
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if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) {
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ieee80211_node_incref(ni); /* mark referenced */
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return ni;
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}
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}
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return NULL;
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}
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bss_t *
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wlan_find_node(struct ieee80211_node_table *nt, const A_UINT8 *macaddr)
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{
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bss_t *ni;
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IEEE80211_NODE_LOCK(nt);
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ni = _ieee80211_find_node(nt, macaddr);
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IEEE80211_NODE_UNLOCK(nt);
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return ni;
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}
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/*
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* Reclaim a node. If this is the last reference count then
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* do the normal free work. Otherwise remove it from the node
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* table and mark it gone by clearing the back-reference.
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*/
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void
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wlan_node_reclaim(struct ieee80211_node_table *nt, bss_t *ni)
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{
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IEEE80211_NODE_LOCK(nt);
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if(ni->ni_list_prev == NULL)
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{
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/* First in list so fix the list head */
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nt->nt_node_first = ni->ni_list_next;
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}
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else
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{
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ni->ni_list_prev->ni_list_next = ni->ni_list_next;
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}
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if(ni->ni_list_next == NULL)
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{
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/* Last in list so fix list tail */
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nt->nt_node_last = ni->ni_list_prev;
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}
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else
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{
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ni->ni_list_next->ni_list_prev = ni->ni_list_prev;
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}
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if(ni->ni_hash_prev == NULL)
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{
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/* First in list so fix the list head */
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int hash;
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hash = IEEE80211_NODE_HASH(ni->ni_macaddr);
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nt->nt_hash[hash] = ni->ni_hash_next;
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}
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else
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{
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ni->ni_hash_prev->ni_hash_next = ni->ni_hash_next;
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}
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if(ni->ni_hash_next != NULL)
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{
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ni->ni_hash_next->ni_hash_prev = ni->ni_hash_prev;
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}
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wlan_node_free(ni);
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IEEE80211_NODE_UNLOCK(nt);
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}
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static void
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wlan_node_dec_free(bss_t *ni)
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{
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if (ieee80211_node_dectestref(ni)) {
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wlan_node_free(ni);
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}
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}
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void
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wlan_free_allnodes(struct ieee80211_node_table *nt)
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{
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bss_t *ni;
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while ((ni = nt->nt_node_first) != NULL) {
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wlan_node_reclaim(nt, ni);
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}
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}
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void
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wlan_iterate_nodes(struct ieee80211_node_table *nt, wlan_node_iter_func *f,
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void *arg)
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{
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bss_t *ni;
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A_UINT32 gen;
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gen = ++nt->nt_scangen;
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IEEE80211_NODE_LOCK(nt);
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for (ni = nt->nt_node_first; ni; ni = ni->ni_list_next) {
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if (ni->ni_scangen != gen) {
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ni->ni_scangen = gen;
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(void) ieee80211_node_incref(ni);
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(*f)(arg, ni);
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wlan_node_dec_free(ni);
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}
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}
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IEEE80211_NODE_UNLOCK(nt);
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}
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/*
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* Node table support.
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*/
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void
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wlan_node_table_init(void *wmip, struct ieee80211_node_table *nt)
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{
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int i;
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AR_DEBUG_PRINTF(ATH_DEBUG_WLAN, ("node table = 0x%x\n", (A_UINT32)nt));
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IEEE80211_NODE_LOCK_INIT(nt);
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nt->nt_node_first = nt->nt_node_last = NULL;
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for(i = 0; i < IEEE80211_NODE_HASHSIZE; i++)
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{
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nt->nt_hash[i] = NULL;
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}
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A_INIT_TIMER(&nt->nt_inact_timer, wlan_node_timeout, nt);
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nt->isTimerArmed = FALSE;
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nt->nt_wmip = wmip;
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}
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static void
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wlan_node_timeout(A_ATH_TIMER arg)
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{
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struct ieee80211_node_table *nt = (struct ieee80211_node_table *)arg;
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bss_t *bss, *nextBss;
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A_UINT8 myBssid[IEEE80211_ADDR_LEN], reArmTimer = FALSE;
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wmi_get_current_bssid(nt->nt_wmip, myBssid);
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bss = nt->nt_node_first;
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while (bss != NULL)
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{
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nextBss = bss->ni_list_next;
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if (A_MEMCMP(myBssid, bss->ni_macaddr, sizeof(myBssid)) != 0)
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{
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if (bss->ni_tstamp <= A_GET_MS(0))
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{
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/*
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* free up all but the current bss - if set
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*/
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wlan_node_reclaim(nt, bss);
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}
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else
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{
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/*
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* Re-arm timer, only when we have a bss other than
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* current bss AND it is not aged-out.
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*/
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reArmTimer = TRUE;
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}
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}
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bss = nextBss;
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}
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if(reArmTimer)
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A_TIMEOUT_MS(&nt->nt_inact_timer, WLAN_NODE_INACT_TIMEOUT_MSEC, 0);
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nt->isTimerArmed = reArmTimer;
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}
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void
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wlan_node_table_cleanup(struct ieee80211_node_table *nt)
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{
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A_UNTIMEOUT(&nt->nt_inact_timer);
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A_DELETE_TIMER(&nt->nt_inact_timer);
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wlan_free_allnodes(nt);
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IEEE80211_NODE_LOCK_DESTROY(nt);
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}
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bss_t *
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wlan_find_Ssidnode (struct ieee80211_node_table *nt, A_UCHAR *pSsid,
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A_UINT32 ssidLength, A_BOOL bIsWPA2)
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{
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bss_t *ni = NULL;
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A_UCHAR *pIESsid = NULL;
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IEEE80211_NODE_LOCK (nt);
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for (ni = nt->nt_node_first; ni; ni = ni->ni_list_next) {
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pIESsid = ni->ni_cie.ie_ssid;
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if (pIESsid[1] <= 32) {
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// Step 1 : Check SSID
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if (0x00 == memcmp (pSsid, &pIESsid[2], ssidLength)) {
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// Step 2 : if SSID matches, check WPA or WPA2
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if (TRUE == bIsWPA2 && NULL != ni->ni_cie.ie_rsn) {
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ieee80211_node_incref (ni); /* mark referenced */
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IEEE80211_NODE_UNLOCK (nt);
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return ni;
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}
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if (FALSE == bIsWPA2 && NULL != ni->ni_cie.ie_wpa) {
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ieee80211_node_incref(ni); /* mark referenced */
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IEEE80211_NODE_UNLOCK (nt);
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return ni;
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}
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}
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}
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}
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IEEE80211_NODE_UNLOCK (nt);
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return NULL;
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}
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void
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wlan_node_return (struct ieee80211_node_table *nt, bss_t *ni)
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{
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IEEE80211_NODE_LOCK (nt);
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wlan_node_dec_free (ni);
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IEEE80211_NODE_UNLOCK (nt);
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}
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