From 5a3e16857d5da8a5db2e2c803129ccb43982cfc1 Mon Sep 17 00:00:00 2001 From: Andy Green Date: Wed, 19 Nov 2008 17:11:20 +0000 Subject: prepare-ar6001-driver-linux-sdio.patch Signed-off-by: Andy Green --- drivers/ar6000/wlan/wlan_node.c | 371 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 371 insertions(+) create mode 100644 drivers/ar6000/wlan/wlan_node.c (limited to 'drivers/ar6000/wlan/wlan_node.c') diff --git a/drivers/ar6000/wlan/wlan_node.c b/drivers/ar6000/wlan/wlan_node.c new file mode 100644 index 00000000000..b12484597f8 --- /dev/null +++ b/drivers/ar6000/wlan/wlan_node.c @@ -0,0 +1,371 @@ +/*- + * 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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +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); +} -- cgit v1.2.3