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