bssdb.c

VIA VT6655 x86下的Linux Source Code

/*
 * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
 * All rights reserved.
 *
 * This software is copyrighted by and is the sole property of
 * VIA Networking Technologies, Inc. This software may only be used
 * in accordance with the corresponding license agreement. Any unauthorized
 * use, duplication, transmission, distribution, or disclosure of this
 * software is expressly forbidden.
 *
 * This software is provided by VIA Networking Technologies, Inc. "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 VIA Networking Technologies, Inc.
 * be liable for any direct, indirect, incidental, special, exemplary, or
 * consequential damages. 
 *
 * File: bssdb.c
 *
 * Purpose: Handles the Basic Service Set & Node Database functions
 *
 * Functions:
 *      BSSpSearchBSSList - Search known BSS list for Desire SSID or BSSID
 *      BSSvClearBSSList - Clear BSS List
 *      BSSbInsertToBSSList - Insert a BSS set into known BSS list
 *      BSSbUpdateToBSSList - Update BSS set in known BSS list
 *      BSSDBbIsSTAInNodeDB - Search Node DB table to find the index of matched DstAddr
 *      BSSvCreateOneNode - Allocate an Node for Node DB
 *      BSSvUpdateAPNode - Update AP Node content in Index 0 of KnownNodeDB
 *      BSSvSecondCallBack - One second timer callback function to update Node DB info & AP link status
 *      BSSvUpdateNodeTxCounter - Update Tx attemps, Tx failure counter in Node DB for auto-fall back rate control
 *
 * Revision History:
 *
 * Author: Lyndon Chen
 *
 * Date: July 17, 2002
 *
 */



#if !defined(__TTYPE_H__)
#include "ttype.h"
#endif
#if !defined(__TMACRO_H__)
#include "tmacro.h"
#endif
#if !defined(__TETHER_H__)
#include "tether.h"
#endif
#if !defined(__DEVICE_H__)
#include "device.h"
#endif
#if !defined(__80211HDR_H__)
#include "80211hdr.h"
#endif
#if !defined(__BSSDB_H__)
#include "bssdb.h"
#endif
#if !defined(__WMGR_H__)
#include "wmgr.h"
#endif
#if !defined(__DATARATE_H__)
#include "datarate.h"
#endif
#if !defined(__DESC_H__)
#include "desc.h"
#endif
#if !defined(__WCMD_H__)
#include "wcmd.h"
#endif
#if !defined(__WPA_H__)
#include "wpa.h"
#endif
#if !defined(__BASEBAND_H__)
#include "baseband.h"
#endif
#if !defined(__RF_H__)
#include "rf.h"
#endif
#if !defined(__CARD_H__)
#include "card.h"
#endif                 
#if !defined(__MAC_H__)
#include "mac.h"
#endif
#if !defined(__WPA2_H__)
#include "wpa2.h"
#endif
#if !defined(__UMEM_H__)
#include "umem.h"
#endif


/*---------------------  Static Definitions -------------------------*/




/*---------------------  Static Classes  ----------------------------*/

/*---------------------  Static Variables  --------------------------*/
static int          msglevel                =MSG_LEVEL_INFO;
//static int          msglevel                =MSG_LEVEL_DEBUG;



const WORD             awHWRetry0[5][5] = {
                                            {RATE_18M, RATE_18M, RATE_12M, RATE_12M, RATE_12M},
                                            {RATE_24M, RATE_24M, RATE_18M, RATE_12M, RATE_12M},
                                            {RATE_36M, RATE_36M, RATE_24M, RATE_18M, RATE_18M},
                                            {RATE_48M, RATE_48M, RATE_36M, RATE_24M, RATE_24M},
                                            {RATE_54M, RATE_54M, RATE_48M, RATE_36M, RATE_36M}
                                           };
const WORD             awHWRetry1[5][5] = {
                                            {RATE_18M, RATE_18M, RATE_12M, RATE_6M, RATE_6M},
                                            {RATE_24M, RATE_24M, RATE_18M, RATE_6M, RATE_6M},
                                            {RATE_36M, RATE_36M, RATE_24M, RATE_12M, RATE_12M},
                                            {RATE_48M, RATE_48M, RATE_24M, RATE_12M, RATE_12M},
                                            {RATE_54M, RATE_54M, RATE_36M, RATE_18M, RATE_18M}
                                           };



/*---------------------  Static Functions  --------------------------*/

VOID s_vCheckSensitivity(
    IN HANDLE hDeviceContext
    );



/*---------------------  Export Variables  --------------------------*/


/*---------------------  Export Functions  --------------------------*/





/*+
 * 
 * Routine Description:
 *    Search known BSS list for Desire SSID or BSSID.
 *
 * Return Value:
 *    PTR to KnownBSS or NULL
 *
-*/

PKnownBSS
BSSpSearchBSSList(
    IN HANDLE hDeviceContext,
    IN PBYTE pbyDesireBSSID,
    IN PBYTE pbyDesireSSID,
    IN CARD_PHY_TYPE ePhyType
    )
{   
    PSDevice        pDevice = (PSDevice)hDeviceContext;
    PSMgmtObject    pMgmt = pDevice->pMgmt;    
    PBYTE           pbyBSSID = NULL;
    PWLAN_IE_SSID   pSSID = NULL;
    PKnownBSS       pCurrBSS = NULL;
    PKnownBSS       pSelect = NULL;
    UINT            ii = 0;

    if (pbyDesireBSSID != NULL) {
        DEVICE_PRT(MSG_LEVEL_DEBUG, KERN_INFO"BSSpSearchBSSList BSSID[%02X %02X %02X-%02X %02X %02X]\n",
                            *pbyDesireBSSID,*(pbyDesireBSSID+1),*(pbyDesireBSSID+2),
                            *(pbyDesireBSSID+3),*(pbyDesireBSSID+4),*(pbyDesireBSSID+5));
        if (!IS_BROADCAST_ADDRESS(pbyDesireBSSID)) {
            pbyBSSID = pbyDesireBSSID;
        }
    }
    if (pbyDesireSSID != NULL) {
        if (((PWLAN_IE_SSID)pbyDesireSSID)->len != 0) {
            pSSID = (PWLAN_IE_SSID) pbyDesireSSID;
        }
    }

    if (pbyBSSID != NULL) {
        // match BSSID first
        for (ii = 0; ii <MAX_BSS_NUM; ii++) {
            pCurrBSS = &(pMgmt->sBSSList[ii]);
            if ((pCurrBSS->bActive) &&
                (pCurrBSS->bSelected == FALSE)) {
                if (IS_ETH_ADDRESS_EQUAL(pCurrBSS->abyBSSID, pbyBSSID)) {
                    if (pSSID != NULL) {
                        // compare ssid
                        if (MEMEqualMemory(pSSID->abySSID,
                            ((PWLAN_IE_SSID)pCurrBSS->abySSID)->abySSID,
                            pSSID->len)) {
                            if ((pMgmt->eConfigMode == WMAC_CONFIG_AUTO) ||
                                ((pMgmt->eConfigMode == WMAC_CONFIG_IBSS_STA) && WLAN_GET_CAP_INFO_IBSS(pCurrBSS->wCapInfo)) ||
                                ((pMgmt->eConfigMode == WMAC_CONFIG_ESS_STA) && WLAN_GET_CAP_INFO_ESS(pCurrBSS->wCapInfo))
                                ) {
                                pCurrBSS->bSelected = TRUE;
                                return(pCurrBSS);
                            }
                        }
                    } else {
                        if ((pMgmt->eConfigMode == WMAC_CONFIG_AUTO) ||
                            ((pMgmt->eConfigMode == WMAC_CONFIG_IBSS_STA) && WLAN_GET_CAP_INFO_IBSS(pCurrBSS->wCapInfo)) ||
                            ((pMgmt->eConfigMode == WMAC_CONFIG_ESS_STA) && WLAN_GET_CAP_INFO_ESS(pCurrBSS->wCapInfo))
                            ) {
                            pCurrBSS->bSelected = TRUE;
                            return(pCurrBSS);
                        }
                    }
                }
            }
        }
    } else {
        // ignore BSSID
        for (ii = 0; ii <MAX_BSS_NUM; ii++) {
            pCurrBSS = &(pMgmt->sBSSList[ii]);
            if ((pCurrBSS->bActive) &&
                (pCurrBSS->bSelected == FALSE)) {
                if (pSSID != NULL) {
                    // matched SSID
                    if (!MEMEqualMemory(pSSID->abySSID,
                        ((PWLAN_IE_SSID)pCurrBSS->abySSID)->abySSID,                    
                        pSSID->len) ||
                        (pSSID->len != ((PWLAN_IE_SSID)pCurrBSS->abySSID)->len)) {
                        // SSID not match skip this BSS
                        continue;
                    }
                }
                if (((pMgmt->eConfigMode == WMAC_CONFIG_IBSS_STA) && WLAN_GET_CAP_INFO_ESS(pCurrBSS->wCapInfo)) ||
                    ((pMgmt->eConfigMode == WMAC_CONFIG_ESS_STA) && WLAN_GET_CAP_INFO_IBSS(pCurrBSS->wCapInfo))
                    ) {
                    // Type not match skip this BSS
                    DEVICE_PRT(MSG_LEVEL_DEBUG, KERN_INFO"BSS type mismatch.... Config[%d] BSS[0x%04x]\n", pMgmt->eConfigMode, pCurrBSS->wCapInfo);
                    continue;
                }

                if (ePhyType != PHY_TYPE_AUTO) {
                    if (((ePhyType == PHY_TYPE_11A) && (PHY_TYPE_11A != pCurrBSS->eNetworkTypeInUse)) ||
                        ((ePhyType != PHY_TYPE_11A) && (PHY_TYPE_11A == pCurrBSS->eNetworkTypeInUse))) {
                        // PhyType not match skip this BSS
                        DEVICE_PRT(MSG_LEVEL_DEBUG, KERN_INFO"Physical type mismatch.... ePhyType[%d] BSS[%d]\n", ePhyType, pCurrBSS->eNetworkTypeInUse);
                        continue;
                    }
                }
/*                
                if (pMgmt->eAuthenMode < WMAC_AUTH_WPA) {
                    if (pCurrBSS->bWPAValid == TRUE) {
                        // WPA AP will reject connection of station without WPA enable.
                        continue;
                    }
                } else if ((pMgmt->eAuthenMode == WMAC_AUTH_WPA) ||
                           (pMgmt->eAuthenMode == WMAC_AUTH_WPAPSK)) {
                    if (pCurrBSS->bWPAValid == FALSE) {
                        // station with WPA enable can't join NonWPA AP.
                        continue;
                    }
                } else if ((pMgmt->eAuthenMode == WMAC_AUTH_WPA2) ||
                           (pMgmt->eAuthenMode == WMAC_AUTH_WPA2PSK)) {
                    if (pCurrBSS->bWPA2Valid == FALSE) {
                        // station with WPA2 enable can't join NonWPA2 AP.
                        continue;
                    }
                }                
*/                

                if (pSelect == NULL) {
                    pSelect = pCurrBSS;
                } else {
                    // compare RSSI, select signal strong one
                    if (pCurrBSS->uRSSI < pSelect->uRSSI) {
                        pSelect = pCurrBSS;
                    }
                }
            }
        }
        if (pSelect != NULL) {
            pSelect->bSelected = TRUE;
            return(pSelect);
        }
    }
    return(NULL);    

}


/*+
 * 
 * Routine Description:
 *    Clear BSS List
 *
 * Return Value:
 *    None.
 *
-*/


VOID
BSSvClearBSSList(
    IN HANDLE hDeviceContext,
    IN BOOL bKeepCurrBSSID    
    )
{
    PSDevice     pDevice = (PSDevice)hDeviceContext;
    PSMgmtObject    pMgmt = pDevice->pMgmt;
    UINT            ii;
     
    for (ii = 0; ii < MAX_BSS_NUM; ii++) {
        if (bKeepCurrBSSID) {
            if (pMgmt->sBSSList[ii].bActive &&
                IS_ETH_ADDRESS_EQUAL(pMgmt->sBSSList[ii].abyBSSID, pMgmt->abyCurrBSSID)) {
                bKeepCurrBSSID = FALSE;    
                continue;
            }
        }    

        if ((pMgmt->sBSSList[ii].bActive) && (pMgmt->sBSSList[ii].uClearCount < BSS_CLEAR_COUNT)) {
             pMgmt->sBSSList[ii].uClearCount ++;
             continue;
        }       

        pMgmt->sBSSList[ii].bActive = FALSE;
        memset(&pMgmt->sBSSList[ii], 0, sizeof(KnownBSS));
    }
    BSSvClearAnyBSSJoinRecord(pDevice);    

    return;   
}



/*+
 * 
 * Routine Description:
 *    search BSS list by BSSID & SSID if matched
 *
 * Return Value:
 *    TRUE if found.
 *
-*/
PKnownBSS
BSSpAddrIsInBSSList(
    IN HANDLE hDeviceContext,
    IN PBYTE abyBSSID,
    IN PWLAN_IE_SSID pSSID
    )
{
    PSDevice     pDevice = (PSDevice)hDeviceContext;
    PSMgmtObject    pMgmt = pDevice->pMgmt;
    PKnownBSS       pBSSList = NULL;
    UINT            ii;

    for (ii = 0; ii < MAX_BSS_NUM; ii++) {
        pBSSList = &(pMgmt->sBSSList[ii]);
        if (pBSSList->bActive) {
            if (IS_ETH_ADDRESS_EQUAL(pBSSList->abyBSSID, abyBSSID)) {
//                if (pSSID == NULL)
//                    return pBSSList;                
                if (pSSID->len == ((PWLAN_IE_SSID)pBSSList->abySSID)->len){
                    if (memcmp(pSSID->abySSID, 
                            ((PWLAN_IE_SSID)pBSSList->abySSID)->abySSID,
                            pSSID->len) == 0)  
                        return pBSSList;
                }        
            }   
        }        
    }
    
    return NULL;
};




/*+
 * 
 * Routine Description:
 *    Insert a BSS set into known BSS list
 *
 * Return Value:
 *    TRUE if success.