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coral / mt7668-wifi-mod / c1061b50fed7767b10f18e20ad29797badd45074 / . / mgmt / scan.c
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/******************************************************************************
*
* This file is provided under a dual license. When you use or
* distribute this software, you may choose to be licensed under
* version 2 of the GNU General Public License ("GPLv2 License")
* or BSD License.
*
* GPLv2 License
*
* Copyright(C) 2016 MediaTek Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See http://www.gnu.org/licenses/gpl-2.0.html for more details.
*
* BSD LICENSE
*
* Copyright(C) 2016 MediaTek Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 COPYRIGHT
* HOLDER OR CONTRIBUTORS 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: //Department/DaVinci/BRANCHES/MT6620_WIFI_DRIVER_V2_3/mgmt/scan.c#4
*/
/*! \file "scan.c"
* \brief This file defines the scan profile and the processing function of
* scan result for SCAN Module.
*
* The SCAN Profile selection is part of SCAN MODULE and responsible for defining
* SCAN Parameters - e.g. MIN_CHANNEL_TIME, number of scan channels.
* In this file we also define the process of SCAN Result including adding, searching
* and removing SCAN record from the list.
*/
/*******************************************************************************
* C O M P I L E R F L A G S
********************************************************************************
*/
/*******************************************************************************
* E X T E R N A L R E F E R E N C E S
********************************************************************************
*/
#include "precomp.h"
/*******************************************************************************
* C O N S T A N T S
********************************************************************************
*/
#define REPLICATED_BEACON_TIME_THRESHOLD (3000)
#define REPLICATED_BEACON_FRESH_PERIOD (10000)
#define REPLICATED_BEACON_STRENGTH_THRESHOLD (32)
#define ROAMING_NO_SWING_RCPI_STEP (10)
/*******************************************************************************
* D A T A T Y P E S
********************************************************************************
*/
/*******************************************************************************
* P U B L I C D A T A
********************************************************************************
*/
/*******************************************************************************
* P R I V A T E D A T A
********************************************************************************
*/
/*******************************************************************************
* M A C R O S
********************************************************************************
*/
/*******************************************************************************
* F U N C T I O N D E C L A R A T I O N S
********************************************************************************
*/
/*******************************************************************************
* F U N C T I O N S
********************************************************************************
*/
/*----------------------------------------------------------------------------*/
/*!
* @brief This function is used by SCN to initialize its variables
*
* @param (none)
*
* @return (none)
*/
/*----------------------------------------------------------------------------*/
VOID scnInit(IN P_ADAPTER_T prAdapter)
{
P_SCAN_INFO_T prScanInfo;
P_BSS_DESC_T prBSSDesc;
PUINT_8 pucBSSBuff;
UINT_32 i;
#if CFG_SUPPORT_ROAMING_SKIP_ONE_AP
P_ROAM_BSS_DESC_T prRoamBSSDesc;
PUINT_8 pucRoamBSSBuff;
#endif
ASSERT(prAdapter);
prScanInfo = &(prAdapter->rWifiVar.rScanInfo);
pucBSSBuff = &prScanInfo->aucScanBuffer[0];
#if CFG_SUPPORT_ROAMING_SKIP_ONE_AP
pucRoamBSSBuff = &prScanInfo->aucScanRoamBuffer[0];
#endif
DBGLOG(SCN, INFO, "->scnInit()\n");
/* 4 <1> Reset STATE and Message List */
prScanInfo->eCurrentState = SCAN_STATE_IDLE;
prScanInfo->rLastScanCompletedTime = (OS_SYSTIME) 0;
LINK_INITIALIZE(&prScanInfo->rPendingMsgList);
/* 4 <2> Reset link list of BSS_DESC_T */
kalMemZero((PVOID) pucBSSBuff, SCN_MAX_BUFFER_SIZE);
#if CFG_SUPPORT_ROAMING_SKIP_ONE_AP
kalMemZero((PVOID) pucRoamBSSBuff, SCN_ROAM_MAX_BUFFER_SIZE);
#endif
LINK_INITIALIZE(&prScanInfo->rFreeBSSDescList);
LINK_INITIALIZE(&prScanInfo->rBSSDescList);
#if CFG_SUPPORT_ROAMING_SKIP_ONE_AP
LINK_INITIALIZE(&prScanInfo->rRoamFreeBSSDescList);
LINK_INITIALIZE(&prScanInfo->rRoamBSSDescList);
#endif
for (i = 0; i < CFG_MAX_NUM_BSS_LIST; i++) {
prBSSDesc = (P_BSS_DESC_T) pucBSSBuff;
LINK_INSERT_TAIL(&prScanInfo->rFreeBSSDescList, &prBSSDesc->rLinkEntry);
pucBSSBuff += ALIGN_4(sizeof(BSS_DESC_T));
}
/* Check if the memory allocation consist with this initialization function */
ASSERT(((ULONG) pucBSSBuff - (ULONG)&prScanInfo->aucScanBuffer[0]) == SCN_MAX_BUFFER_SIZE);
#if CFG_SUPPORT_ROAMING_SKIP_ONE_AP
for (i = 0; i < CFG_MAX_NUM_ROAM_BSS_LIST; i++) {
prRoamBSSDesc = (P_ROAM_BSS_DESC_T) pucRoamBSSBuff;
LINK_INSERT_TAIL(&prScanInfo->rRoamFreeBSSDescList, &prRoamBSSDesc->rLinkEntry);
pucRoamBSSBuff += ALIGN_4(sizeof(ROAM_BSS_DESC_T));
}
ASSERT(((ULONG) pucRoamBSSBuff - (ULONG)&prScanInfo->aucScanRoamBuffer[0]) ==
SCN_ROAM_MAX_BUFFER_SIZE);
#endif
/* reset freest channel information */
prScanInfo->fgIsSparseChannelValid = FALSE;
/* reset NLO state */
prScanInfo->fgNloScanning = FALSE;
} /* end of scnInit() */
VOID scnFreeAllPendingScanRquests(IN P_ADAPTER_T prAdapter)
{
P_SCAN_INFO_T prScanInfo;
P_MSG_HDR_T prMsgHdr;
P_MSG_SCN_SCAN_REQ prScanReqMsg;
prScanInfo = &(prAdapter->rWifiVar.rScanInfo);
/* check for pending scanning requests */
while (!LINK_IS_EMPTY(&(prScanInfo->rPendingMsgList))) {
/* load next message from pending list as scan parameters */
LINK_REMOVE_HEAD(&(prScanInfo->rPendingMsgList), prMsgHdr, P_MSG_HDR_T);
if (prMsgHdr) {
prScanReqMsg = (P_MSG_SCN_SCAN_REQ) prMsgHdr;
DBGLOG(SCN, INFO,
"free scan request eMsgId[%d] ucSeqNum [%d] BSSID[%d]!!\n", prMsgHdr->eMsgId,
prScanReqMsg->ucSeqNum, prScanReqMsg->ucBssIndex);
cnmMemFree(prAdapter, prMsgHdr);
} else {
/* should not deliver to this function */
ASSERT(0);
}
/* switch to next state */
}
DBGLOG(SCN, INFO, "%s()\n", __func__);
}
/*----------------------------------------------------------------------------*/
/*!
* @brief This function is used by SCN to uninitialize its variables
*
* @param (none)
*
* @return (none)
*/
/*----------------------------------------------------------------------------*/
VOID scnUninit(IN P_ADAPTER_T prAdapter)
{
P_SCAN_INFO_T prScanInfo;
ASSERT(prAdapter);
prScanInfo = &(prAdapter->rWifiVar.rScanInfo);
DBGLOG(SCN, INFO, "%s()\n", __func__);
scnFreeAllPendingScanRquests(prAdapter);
/* 4 <1> Reset STATE and Message List */
prScanInfo->eCurrentState = SCAN_STATE_IDLE;
prScanInfo->rLastScanCompletedTime = (OS_SYSTIME) 0;
/* NOTE(Kevin): Check rPendingMsgList ? */
/* 4 <2> Reset link list of BSS_DESC_T */
LINK_INITIALIZE(&prScanInfo->rFreeBSSDescList);
LINK_INITIALIZE(&prScanInfo->rBSSDescList);
#if CFG_SUPPORT_ROAMING_SKIP_ONE_AP
LINK_INITIALIZE(&prScanInfo->rRoamFreeBSSDescList);
LINK_INITIALIZE(&prScanInfo->rRoamBSSDescList);
#endif
} /* end of scnUninit() */
/*----------------------------------------------------------------------------*/
/*!
* @brief Find the corresponding BSS Descriptor according to given BSSID
*
* @param[in] prAdapter Pointer to the Adapter structure.
* @param[in] aucBSSID Given BSSID.
*
* @return Pointer to BSS Descriptor, if found. NULL, if not found
*/
/*----------------------------------------------------------------------------*/
P_BSS_DESC_T scanSearchBssDescByBssid(IN P_ADAPTER_T prAdapter, IN UINT_8 aucBSSID[])
{
return scanSearchBssDescByBssidAndSsid(prAdapter, aucBSSID, FALSE, NULL);
}
/*----------------------------------------------------------------------------*/
/*!
* @brief Find the corresponding BSS Descriptor according to given BSSID
*
* @param[in] prAdapter Pointer to the Adapter structure.
* @param[in] aucBSSID Given BSSID.
* @param[in] fgCheckSsid Need to check SSID or not. (for multiple SSID with single BSSID cases)
* @param[in] prSsid Specified SSID
*
* @return Pointer to BSS Descriptor, if found. NULL, if not found
*/
/*----------------------------------------------------------------------------*/
P_BSS_DESC_T
scanSearchBssDescByBssidAndSsid(IN P_ADAPTER_T prAdapter,
IN UINT_8 aucBSSID[], IN BOOLEAN fgCheckSsid, IN P_PARAM_SSID_T prSsid)
{
P_SCAN_INFO_T prScanInfo;
P_LINK_T prBSSDescList;
P_BSS_DESC_T prBssDesc;
P_BSS_DESC_T prDstBssDesc = (P_BSS_DESC_T) NULL;
ASSERT(prAdapter);
ASSERT(aucBSSID);
prScanInfo = &(prAdapter->rWifiVar.rScanInfo);
prBSSDescList = &prScanInfo->rBSSDescList;
/* Search BSS Desc from current SCAN result list. */
LINK_FOR_EACH_ENTRY(prBssDesc, prBSSDescList, rLinkEntry, BSS_DESC_T) {
if (!(EQUAL_MAC_ADDR(prBssDesc->aucBSSID, aucBSSID)))
continue;
if (fgCheckSsid == FALSE || prSsid == NULL)
return prBssDesc;
if (EQUAL_SSID(prBssDesc->aucSSID,
prBssDesc->ucSSIDLen, prSsid->aucSsid, prSsid->u4SsidLen)) {
return prBssDesc;
}
if (prDstBssDesc == NULL && prBssDesc->fgIsHiddenSSID == TRUE) {
prDstBssDesc = prBssDesc;
continue;
}
if (prBssDesc->eBSSType == BSS_TYPE_P2P_DEVICE) {
/* 20120206 frog: Equal BSSID but not SSID,
* SSID not hidden, SSID must be updated.
*/
COPY_SSID(prBssDesc->aucSSID, prBssDesc->ucSSIDLen, prSsid->aucSsid,
(UINT_8) (prSsid->u4SsidLen));
return prBssDesc;
}
}
return prDstBssDesc;
} /* end of scanSearchBssDescByBssid() */
/*----------------------------------------------------------------------------*/
/*!
* @brief Find the corresponding BSS Descriptor according to given Transmitter Address.
*
* @param[in] prAdapter Pointer to the Adapter structure.
* @param[in] aucSrcAddr Given Source Address(TA).
*
* @return Pointer to BSS Descriptor, if found. NULL, if not found
*/
/*----------------------------------------------------------------------------*/
P_BSS_DESC_T scanSearchBssDescByTA(IN P_ADAPTER_T prAdapter, IN UINT_8 aucSrcAddr[])
{
return scanSearchBssDescByTAAndSsid(prAdapter, aucSrcAddr, FALSE, NULL);
}
/*----------------------------------------------------------------------------*/
/*!
* @brief Find the corresponding BSS Descriptor according to given Transmitter Address.
*
* @param[in] prAdapter Pointer to the Adapter structure.
* @param[in] aucSrcAddr Given Source Address(TA).
* @param[in] fgCheckSsid Need to check SSID or not. (for multiple SSID with single BSSID cases)
* @param[in] prSsid Specified SSID
*
* @return Pointer to BSS Descriptor, if found. NULL, if not found
*/
/*----------------------------------------------------------------------------*/
P_BSS_DESC_T
scanSearchBssDescByTAAndSsid(IN P_ADAPTER_T prAdapter,
IN UINT_8 aucSrcAddr[], IN BOOLEAN fgCheckSsid, IN P_PARAM_SSID_T prSsid)
{
P_SCAN_INFO_T prScanInfo;
P_LINK_T prBSSDescList;
P_BSS_DESC_T prBssDesc;
P_BSS_DESC_T prDstBssDesc = (P_BSS_DESC_T) NULL;
ASSERT(prAdapter);
ASSERT(aucSrcAddr);
prScanInfo = &(prAdapter->rWifiVar.rScanInfo);
prBSSDescList = &prScanInfo->rBSSDescList;
/* Search BSS Desc from current SCAN result list. */
LINK_FOR_EACH_ENTRY(prBssDesc, prBSSDescList, rLinkEntry, BSS_DESC_T) {
if (EQUAL_MAC_ADDR(prBssDesc->aucSrcAddr, aucSrcAddr)) {
if (fgCheckSsid == FALSE || prSsid == NULL)
return prBssDesc;
if (EQUAL_SSID(prBssDesc->aucSSID,
prBssDesc->ucSSIDLen, prSsid->aucSsid, prSsid->u4SsidLen)) {
return prBssDesc;
} else if (prDstBssDesc == NULL && prBssDesc->fgIsHiddenSSID == TRUE) {
prDstBssDesc = prBssDesc;
}
}
}
return prDstBssDesc;
} /* end of scanSearchBssDescByTA() */
/*----------------------------------------------------------------------------*/
/*!
* @brief Find the corresponding BSS Descriptor according to
* given eBSSType, BSSID and Transmitter Address
*
* @param[in] prAdapter Pointer to the Adapter structure.
* @param[in] eBSSType BSS Type of incoming Beacon/ProbeResp frame.
* @param[in] aucBSSID Given BSSID of Beacon/ProbeResp frame.
* @param[in] aucSrcAddr Given source address (TA) of Beacon/ProbeResp frame.
*
* @return Pointer to BSS Descriptor, if found. NULL, if not found
*/
/*----------------------------------------------------------------------------*/
P_BSS_DESC_T
scanSearchExistingBssDesc(IN P_ADAPTER_T prAdapter,
IN ENUM_BSS_TYPE_T eBSSType, IN UINT_8 aucBSSID[], IN UINT_8 aucSrcAddr[])
{
return scanSearchExistingBssDescWithSsid(prAdapter, eBSSType, aucBSSID, aucSrcAddr, FALSE, NULL);
}
#if CFG_SUPPORT_ROAMING_SKIP_ONE_AP
/*----------------------------------------------------------------------------*/
/*!
* @brief
*
* @param
*
* @return
*/
/*----------------------------------------------------------------------------*/
VOID scanRemoveRoamBssDescsByTime(IN P_ADAPTER_T prAdapter, IN UINT_32 u4RemoveTime)
{
P_SCAN_INFO_T prScanInfo;
P_LINK_T prRoamBSSDescList;
P_LINK_T prRoamFreeBSSDescList;
P_ROAM_BSS_DESC_T prRoamBssDesc;
P_ROAM_BSS_DESC_T prRoamBSSDescNext;
OS_SYSTIME rCurrentTime;
ASSERT(prAdapter);
prScanInfo = &(prAdapter->rWifiVar.rScanInfo);
prRoamBSSDescList = &prScanInfo->rRoamBSSDescList;
prRoamFreeBSSDescList = &prScanInfo->rRoamFreeBSSDescList;
GET_CURRENT_SYSTIME(&rCurrentTime);
LINK_FOR_EACH_ENTRY_SAFE(prRoamBssDesc, prRoamBSSDescNext, prRoamBSSDescList, rLinkEntry,
ROAM_BSS_DESC_T) {
if (CHECK_FOR_TIMEOUT(rCurrentTime, prRoamBssDesc->rUpdateTime,
SEC_TO_SYSTIME(u4RemoveTime))) {
LINK_REMOVE_KNOWN_ENTRY(prRoamBSSDescList, prRoamBssDesc);
LINK_INSERT_TAIL(prRoamFreeBSSDescList, &prRoamBssDesc->rLinkEntry);
}
}
}
/*----------------------------------------------------------------------------*/
/*!
* @brief
*
* @param
*
* @return
*/
/*----------------------------------------------------------------------------*/
P_ROAM_BSS_DESC_T
scanSearchRoamBssDescBySsid(IN P_ADAPTER_T prAdapter, IN P_BSS_DESC_T prBssDesc)
{
P_SCAN_INFO_T prScanInfo;
P_LINK_T prRoamBSSDescList;
P_ROAM_BSS_DESC_T prRoamBssDesc;
ASSERT(prAdapter);
prScanInfo = &(prAdapter->rWifiVar.rScanInfo);
prRoamBSSDescList = &prScanInfo->rRoamBSSDescList;
/* Search BSS Desc from current SCAN result list. */
LINK_FOR_EACH_ENTRY(prRoamBssDesc, prRoamBSSDescList, rLinkEntry, ROAM_BSS_DESC_T) {
if (EQUAL_SSID(prRoamBssDesc->aucSSID, prRoamBssDesc->ucSSIDLen,
prBssDesc->aucSSID, prBssDesc->ucSSIDLen)) {
return prRoamBssDesc;
}
}
return NULL;
}
/*----------------------------------------------------------------------------*/
/*!
* @brief
*
* @param
*
* @return
*/
/*----------------------------------------------------------------------------*/
P_ROAM_BSS_DESC_T scanAllocateRoamBssDesc(IN P_ADAPTER_T prAdapter)
{
P_SCAN_INFO_T prScanInfo;
P_LINK_T prRoamFreeBSSDescList;
P_ROAM_BSS_DESC_T prRoamBssDesc = NULL;
ASSERT(prAdapter);
prScanInfo = &(prAdapter->rWifiVar.rScanInfo);
prRoamFreeBSSDescList = &prScanInfo->rRoamFreeBSSDescList;
LINK_REMOVE_HEAD(prRoamFreeBSSDescList, prRoamBssDesc, P_ROAM_BSS_DESC_T);
if (prRoamBssDesc) {
P_LINK_T prRoamBSSDescList;
kalMemZero(prRoamBssDesc, sizeof(ROAM_BSS_DESC_T));
prRoamBSSDescList = &prScanInfo->rRoamBSSDescList;
LINK_INSERT_HEAD(prRoamBSSDescList, &prRoamBssDesc->rLinkEntry);
}
return prRoamBssDesc;
}
/*----------------------------------------------------------------------------*/
/*!
* @brief
*
* @param
*
* @return
*/
/*----------------------------------------------------------------------------*/
VOID scanAddToRoamBssDesc(IN P_ADAPTER_T prAdapter, IN P_BSS_DESC_T prBssDesc)
{
P_ROAM_BSS_DESC_T prRoamBssDesc;
prRoamBssDesc = scanSearchRoamBssDescBySsid(prAdapter, prBssDesc);
if (prRoamBssDesc == NULL) {
UINT_32 u4RemoveTime = REMOVE_TIMEOUT_TWO_DAY;
do {
prRoamBssDesc = scanAllocateRoamBssDesc(prAdapter);
if (prRoamBssDesc)
break;
scanRemoveRoamBssDescsByTime(prAdapter, u4RemoveTime);
u4RemoveTime = u4RemoveTime / 2;
} while (u4RemoveTime > 0);
if (prRoamBssDesc != NULL)
COPY_SSID(prRoamBssDesc->aucSSID, prRoamBssDesc->ucSSIDLen,
prBssDesc->aucSSID, prBssDesc->ucSSIDLen);
}
if (prRoamBssDesc != NULL)
GET_CURRENT_SYSTIME(&prRoamBssDesc->rUpdateTime);
}
/*----------------------------------------------------------------------------*/
/*!
* @brief
*
* @param
*
* @return
*/
/*----------------------------------------------------------------------------*/
VOID scanSearchBssDescOfRoamSsid(IN P_ADAPTER_T prAdapter)
{
#define SSID_ONLY_EXIST_ONE_AP 1 /* If only exist one same ssid AP, avoid unnecessary scan */
P_SCAN_INFO_T prScanInfo;
P_LINK_T prBSSDescList;
P_BSS_DESC_T prBssDesc;
P_BSS_INFO_T prAisBssInfo;
UINT_32 u4SameSSIDCount = 0;
prAisBssInfo = prAdapter->prAisBssInfo;
prScanInfo = &(prAdapter->rWifiVar.rScanInfo);
prBSSDescList = &prScanInfo->rBSSDescList;
if (prAisBssInfo->eConnectionState != PARAM_MEDIA_STATE_CONNECTED)
return;
LINK_FOR_EACH_ENTRY(prBssDesc, prBSSDescList, rLinkEntry, BSS_DESC_T) {
if (EQUAL_SSID(prBssDesc->aucSSID, prBssDesc->ucSSIDLen,
prAisBssInfo->aucSSID, prAisBssInfo->ucSSIDLen)) {
u4SameSSIDCount++;
if (u4SameSSIDCount > SSID_ONLY_EXIST_ONE_AP) {
scanAddToRoamBssDesc(prAdapter, prBssDesc);
break;
}
}
}
}
#endif /* CFG_SUPPORT_ROAMING_SKIP_ONE_AP */
/*----------------------------------------------------------------------------*/
/*!
* @brief Find the corresponding BSS Descriptor according to
* given eBSSType, BSSID and Transmitter Address
*
* @param[in] prAdapter Pointer to the Adapter structure.
* @param[in] eBSSType BSS Type of incoming Beacon/ProbeResp frame.
* @param[in] aucBSSID Given BSSID of Beacon/ProbeResp frame.
* @param[in] aucSrcAddr Given source address (TA) of Beacon/ProbeResp frame.
* @param[in] fgCheckSsid Need to check SSID or not. (for multiple SSID with single BSSID cases)
* @param[in] prSsid Specified SSID
*
* @return Pointer to BSS Descriptor, if found. NULL, if not found
*/
/*----------------------------------------------------------------------------*/
P_BSS_DESC_T
scanSearchExistingBssDescWithSsid(IN P_ADAPTER_T prAdapter,
IN ENUM_BSS_TYPE_T eBSSType,
IN UINT_8 aucBSSID[],
IN UINT_8 aucSrcAddr[], IN BOOLEAN fgCheckSsid, IN P_PARAM_SSID_T prSsid)
{
P_SCAN_INFO_T prScanInfo;
P_BSS_DESC_T prBssDesc, prIBSSBssDesc;
/* CASE III */
P_LINK_T prBSSDescList;
P_LINK_T prFreeBSSDescList;
ASSERT(prAdapter);
ASSERT(aucSrcAddr);
prScanInfo = &(prAdapter->rWifiVar.rScanInfo);
switch (eBSSType) {
case BSS_TYPE_P2P_DEVICE:
fgCheckSsid = FALSE;
/* fall through */
case BSS_TYPE_INFRASTRUCTURE:
#if CFG_SUPPORT_ROAMING_SKIP_ONE_AP
scanSearchBssDescOfRoamSsid(prAdapter);
/* fall through */
#endif
case BSS_TYPE_BOW_DEVICE:
prBssDesc = scanSearchBssDescByBssidAndSsid(prAdapter, aucBSSID, fgCheckSsid, prSsid);
/* if (eBSSType == prBssDesc->eBSSType) */
return prBssDesc;
case BSS_TYPE_IBSS:
prIBSSBssDesc = scanSearchBssDescByBssidAndSsid(prAdapter, aucBSSID, fgCheckSsid, prSsid);
prBssDesc = scanSearchBssDescByTAAndSsid(prAdapter, aucSrcAddr, fgCheckSsid, prSsid);
/* NOTE(Kevin):
* Rules to maintain the SCAN Result:
* For AdHoc -
* CASE I We have TA1(BSSID1), but it change its BSSID to BSSID2
* -> Update TA1 entry's BSSID.
* CASE II We have TA1(BSSID1), and get TA1(BSSID1) again
* -> Update TA1 entry's contain.
* CASE III We have a SCAN result TA1(BSSID1), and TA2(BSSID2). Sooner or
* later, TA2 merge into TA1, we get TA2(BSSID1)
* -> Remove TA2 first and then replace TA1 entry's TA with TA2,
* Still have only one entry of BSSID.
* CASE IV We have a SCAN result TA1(BSSID1), and another TA2 also merge into BSSID1.
* -> Replace TA1 entry's TA with TA2, Still have only one entry.
* CASE V New IBSS
* -> Add this one to SCAN result.
*/
if (prBssDesc) {
if ((!prIBSSBssDesc) || /* CASE I */
(prBssDesc == prIBSSBssDesc)) { /* CASE II */
return prBssDesc;
}
prBSSDescList = &prScanInfo->rBSSDescList;
prFreeBSSDescList = &prScanInfo->rFreeBSSDescList;
/* Remove this BSS Desc from the BSS Desc list */
LINK_REMOVE_KNOWN_ENTRY(prBSSDescList, prBssDesc);
/* Return this BSS Desc to the free BSS Desc list. */
LINK_INSERT_TAIL(prFreeBSSDescList, &prBssDesc->rLinkEntry);
return prIBSSBssDesc;
}
if (prIBSSBssDesc) { /* CASE IV */
return prIBSSBssDesc;
}
/* CASE V */
break; /* Return NULL; */
default:
break;
}
return (P_BSS_DESC_T) NULL;
} /* end of scanSearchExistingBssDesc() */
/*----------------------------------------------------------------------------*/
/*!
* @brief bypass BSS Descriptors from current list according to specific BSSID.
*
* @param[in] prAdapter Pointer to the Adapter structure.
* @param[in] aucBSSID Given BSSID.
*
* @return (none)
*/
/*----------------------------------------------------------------------------*/
BOOLEAN scanByPassRemoveBssDesc(IN P_ADAPTER_T prAdapter, IN P_BSS_DESC_T prBssDesc)
{
P_SCAN_INFO_T prScanInfo;
P_SCAN_PARAM_T prScanParam;
UINT_8 ucIndex = 0;
BOOLEAN fgIsByPassRemove = FALSE;
prScanInfo = &(prAdapter->rWifiVar.rScanInfo);
prScanParam = &prScanInfo->rScanParam;
for (ucIndex = 0; ucIndex < prScanParam->ucSSIDNum; ucIndex++) {
if (EQUAL_SSID(prBssDesc->aucSSID,
prBssDesc->ucSSIDLen,
prScanParam->aucSpecifiedSSID[ucIndex],
prScanParam->ucSpecifiedSSIDLen[ucIndex])) {
fgIsByPassRemove = TRUE;
DBGLOG(INIT, INFO, "scanByPassRemoveBssDesc %s | %s\n",
prBssDesc->aucSSID, prScanParam->aucSpecifiedSSID[ucIndex]);
break;
}
}
return fgIsByPassRemove;
}
/*----------------------------------------------------------------------------*/
/*!
* @brief Delete BSS Descriptors from current list according to given Remove Policy.
*
* @param[in] u4RemovePolicy Remove Policy.
*
* @return (none)
*/
/*----------------------------------------------------------------------------*/
VOID scanRemoveBssDescsByPolicy(IN P_ADAPTER_T prAdapter, IN UINT_32 u4RemovePolicy)
{
P_CONNECTION_SETTINGS_T prConnSettings;
P_SCAN_INFO_T prScanInfo;
P_LINK_T prBSSDescList;
P_LINK_T prFreeBSSDescList;
P_BSS_DESC_T prBssDesc;
ASSERT(prAdapter);
prConnSettings = &(prAdapter->rWifiVar.rConnSettings);
prScanInfo = &(prAdapter->rWifiVar.rScanInfo);
prBSSDescList = &prScanInfo->rBSSDescList;
prFreeBSSDescList = &prScanInfo->rFreeBSSDescList;
/* DBGLOG(SCN, TRACE, ("Before Remove - Number Of SCAN Result = %ld\n", */
/* prBSSDescList->u4NumElem)); */
if (u4RemovePolicy & SCN_RM_POLICY_TIMEOUT) {
P_BSS_DESC_T prBSSDescNext;
OS_SYSTIME rCurrentTime;
GET_CURRENT_SYSTIME(&rCurrentTime);
/* Search BSS Desc from current SCAN result list. */
LINK_FOR_EACH_ENTRY_SAFE(prBssDesc, prBSSDescNext, prBSSDescList, rLinkEntry, BSS_DESC_T) {
if ((u4RemovePolicy & SCN_RM_POLICY_EXCLUDE_CONNECTED) &&
(prBssDesc->fgIsConnected || prBssDesc->fgIsConnecting)) {
/* Don't remove the one currently we are connected. */
continue;
}
if ((u4RemovePolicy & SCN_RM_POLICY_EXCLUDE_SPECIFIC_SSID) &&
scanByPassRemoveBssDesc(prAdapter, prBssDesc)) {
/* Don't remove the one currently we are looking for specifi SSID. */
continue;
}
if (CHECK_FOR_TIMEOUT(rCurrentTime, prBssDesc->rUpdateTime,
SEC_TO_SYSTIME(SCN_BSS_DESC_REMOVE_TIMEOUT_SEC))) {
/* DBGLOG(SCN, TRACE, ("Remove TIMEOUT BSS DESC(%#x):
* MAC: "MACSTR", Current Time = %08lx, Update Time = %08lx\n",
*/
/* prBssDesc, MAC2STR(prBssDesc->aucBSSID), rCurrentTime, prBssDesc->rUpdateTime)); */
/* Remove this BSS Desc from the BSS Desc list */
LINK_REMOVE_KNOWN_ENTRY(prBSSDescList, prBssDesc);
/* Return this BSS Desc to the free BSS Desc list. */
LINK_INSERT_TAIL(prFreeBSSDescList, &prBssDesc->rLinkEntry);
}
}
}
if (u4RemovePolicy & SCN_RM_POLICY_OLDEST_HIDDEN) {
P_BSS_DESC_T prBssDescOldest = (P_BSS_DESC_T) NULL;
/* Search BSS Desc from current SCAN result list. */
LINK_FOR_EACH_ENTRY(prBssDesc, prBSSDescList, rLinkEntry, BSS_DESC_T) {
if ((u4RemovePolicy & SCN_RM_POLICY_EXCLUDE_CONNECTED) &&
(prBssDesc->fgIsConnected || prBssDesc->fgIsConnecting)) {
/* Don't remove the one currently we are connected. */
continue;
}
if ((u4RemovePolicy & SCN_RM_POLICY_EXCLUDE_SPECIFIC_SSID) &&
scanByPassRemoveBssDesc(prAdapter, prBssDesc)) {
/* Don't remove the one currently we are looking for specifi SSID. */
continue;
}
if (!prBssDesc->fgIsHiddenSSID)
continue;
if (!prBssDescOldest) { /* 1st element */
prBssDescOldest = prBssDesc;
continue;
}
if (TIME_BEFORE(prBssDesc->rUpdateTime, prBssDescOldest->rUpdateTime))
prBssDescOldest = prBssDesc;
}
if (prBssDescOldest) {
/* DBGLOG(SCN, TRACE,
* ("Remove OLDEST HIDDEN BSS DESC(%#x): MAC: "MACSTR", Update Time = %08lx\n",
*/
/* prBssDescOldest, MAC2STR(prBssDescOldest->aucBSSID), prBssDescOldest->rUpdateTime)); */
/* Remove this BSS Desc from the BSS Desc list */
LINK_REMOVE_KNOWN_ENTRY(prBSSDescList, prBssDescOldest);
/* Return this BSS Desc to the free BSS Desc list. */
LINK_INSERT_TAIL(prFreeBSSDescList, &prBssDescOldest->rLinkEntry);
}
}
if (u4RemovePolicy & SCN_RM_POLICY_SMART_WEAKEST) {
P_BSS_DESC_T prBssDescWeakest = (P_BSS_DESC_T) NULL;
P_BSS_DESC_T prBssDescWeakestSameSSID = (P_BSS_DESC_T) NULL;
UINT_32 u4SameSSIDCount = 0;
/* Search BSS Desc from current SCAN result list. */
LINK_FOR_EACH_ENTRY(prBssDesc, prBSSDescList, rLinkEntry, BSS_DESC_T) {
if ((u4RemovePolicy & SCN_RM_POLICY_EXCLUDE_CONNECTED) &&
(prBssDesc->fgIsConnected || prBssDesc->fgIsConnecting)) {
/* Don't remove the one currently we are connected. */
continue;
}
if ((u4RemovePolicy & SCN_RM_POLICY_EXCLUDE_SPECIFIC_SSID) &&
scanByPassRemoveBssDesc(prAdapter, prBssDesc)) {
/* Don't remove the one currently we are looking for specifi SSID. */
continue;
}
if ((!prBssDesc->fgIsHiddenSSID) &&
(EQUAL_SSID(prBssDesc->aucSSID,
prBssDesc->ucSSIDLen, prConnSettings->aucSSID, prConnSettings->ucSSIDLen))) {
u4SameSSIDCount++;
if (!prBssDescWeakestSameSSID)
prBssDescWeakestSameSSID = prBssDesc;
else if (prBssDesc->ucRCPI < prBssDescWeakestSameSSID->ucRCPI)
prBssDescWeakestSameSSID = prBssDesc;
}
if (!prBssDescWeakest) { /* 1st element */
prBssDescWeakest = prBssDesc;
continue;
}
if (prBssDesc->ucRCPI < prBssDescWeakest->ucRCPI)
prBssDescWeakest = prBssDesc;
}
if ((u4SameSSIDCount >= SCN_BSS_DESC_SAME_SSID_THRESHOLD) && (prBssDescWeakestSameSSID))
prBssDescWeakest = prBssDescWeakestSameSSID;
if (prBssDescWeakest) {
/* DBGLOG(SCN, TRACE, ("Remove WEAKEST BSS DESC(%#x): MAC: "MACSTR", Update Time = %08lx\n", */
/* prBssDescOldest, MAC2STR(prBssDescOldest->aucBSSID), prBssDescOldest->rUpdateTime)); */
/* Remove this BSS Desc from the BSS Desc list */
LINK_REMOVE_KNOWN_ENTRY(prBSSDescList, prBssDescWeakest);
/* Return this BSS Desc to the free BSS Desc list. */
LINK_INSERT_TAIL(prFreeBSSDescList, &prBssDescWeakest->rLinkEntry);
}
}
if (u4RemovePolicy & SCN_RM_POLICY_ENTIRE) {
P_BSS_DESC_T prBSSDescNext;
LINK_FOR_EACH_ENTRY_SAFE(prBssDesc, prBSSDescNext, prBSSDescList, rLinkEntry, BSS_DESC_T) {
if ((u4RemovePolicy & SCN_RM_POLICY_EXCLUDE_CONNECTED) &&
(prBssDesc->fgIsConnected || prBssDesc->fgIsConnecting)) {
/* Don't remove the one currently we are connected. */
continue;
}
if ((u4RemovePolicy & SCN_RM_POLICY_EXCLUDE_SPECIFIC_SSID) &&
scanByPassRemoveBssDesc(prAdapter, prBssDesc)) {
/* Don't remove the one currently we are looking for specifi SSID. */
continue;
}
/* Remove this BSS Desc from the BSS Desc list */
LINK_REMOVE_KNOWN_ENTRY(prBSSDescList, prBssDesc);
/* Return this BSS Desc to the free BSS Desc list. */
LINK_INSERT_TAIL(prFreeBSSDescList, &prBssDesc->rLinkEntry);
}
}
return;
} /* end of scanRemoveBssDescsByPolicy() */
/*----------------------------------------------------------------------------*/
/*!
* @brief Delete BSS Descriptors from current list according to given BSSID.
*
* @param[in] prAdapter Pointer to the Adapter structure.
* @param[in] aucBSSID Given BSSID.
*
* @return (none)
*/
/*----------------------------------------------------------------------------*/
VOID scanRemoveBssDescByBssid(IN P_ADAPTER_T prAdapter, IN UINT_8 aucBSSID[])
{
P_SCAN_INFO_T prScanInfo;
P_LINK_T prBSSDescList;
P_LINK_T prFreeBSSDescList;
P_BSS_DESC_T prBssDesc = (P_BSS_DESC_T) NULL;
P_BSS_DESC_T prBSSDescNext;
ASSERT(prAdapter);
ASSERT(aucBSSID);
prScanInfo = &(prAdapter->rWifiVar.rScanInfo);
prBSSDescList = &prScanInfo->rBSSDescList;
prFreeBSSDescList = &prScanInfo->rFreeBSSDescList;
/* Check if such BSS Descriptor exists in a valid list */
LINK_FOR_EACH_ENTRY_SAFE(prBssDesc, prBSSDescNext, prBSSDescList, rLinkEntry, BSS_DESC_T) {
if (EQUAL_MAC_ADDR(prBssDesc->aucBSSID, aucBSSID)) {
/* Remove this BSS Desc from the BSS Desc list */
LINK_REMOVE_KNOWN_ENTRY(prBSSDescList, prBssDesc);
/* Return this BSS Desc to the free BSS Desc list. */
LINK_INSERT_TAIL(prFreeBSSDescList, &prBssDesc->rLinkEntry);
/* BSSID is not unique, so need to traverse whols link-list */
}
}
} /* end of scanRemoveBssDescByBssid() */
/*----------------------------------------------------------------------------*/
/*!
* @brief Delete BSS Descriptors from current list according to given band configuration
*
* @param[in] prAdapter Pointer to the Adapter structure.
* @param[in] eBand Given band
* @param[in] ucBssIndex AIS - Remove IBSS/Infrastructure BSS
* BOW - Remove BOW BSS
* P2P - Remove P2P BSS
*
* @return (none)
*/
/*----------------------------------------------------------------------------*/
VOID scanRemoveBssDescByBandAndNetwork(IN P_ADAPTER_T prAdapter, IN ENUM_BAND_T eBand, IN UINT_8 ucBssIndex)
{
P_SCAN_INFO_T prScanInfo;
P_LINK_T prBSSDescList;
P_LINK_T prFreeBSSDescList;
P_BSS_DESC_T prBssDesc = (P_BSS_DESC_T) NULL;
P_BSS_DESC_T prBSSDescNext;
BOOLEAN fgToRemove;
ASSERT(prAdapter);
ASSERT(eBand <= BAND_NUM);
ASSERT(ucBssIndex <= MAX_BSS_INDEX);
prScanInfo = &(prAdapter->rWifiVar.rScanInfo);
prBSSDescList = &prScanInfo->rBSSDescList;
prFreeBSSDescList = &prScanInfo->rFreeBSSDescList;
if (eBand == BAND_NULL)
return; /* no need to do anything, keep all scan result */
/* Check if such BSS Descriptor exists in a valid list */
LINK_FOR_EACH_ENTRY_SAFE(prBssDesc, prBSSDescNext, prBSSDescList, rLinkEntry, BSS_DESC_T) {
fgToRemove = FALSE;
if (prBssDesc->eBand == eBand) {
switch (GET_BSS_INFO_BY_INDEX(prAdapter, ucBssIndex)->eNetworkType) {
case NETWORK_TYPE_AIS:
if ((prBssDesc->eBSSType == BSS_TYPE_INFRASTRUCTURE)
|| (prBssDesc->eBSSType == BSS_TYPE_IBSS)) {
fgToRemove = TRUE;
}
break;
case NETWORK_TYPE_P2P:
if (prBssDesc->eBSSType == BSS_TYPE_P2P_DEVICE)
fgToRemove = TRUE;
break;
case NETWORK_TYPE_BOW:
if (prBssDesc->eBSSType == BSS_TYPE_BOW_DEVICE)
fgToRemove = TRUE;
break;
default:
ASSERT(0);
break;
}
}
if (fgToRemove == TRUE) {
/* Remove this BSS Desc from the BSS Desc list */
LINK_REMOVE_KNOWN_ENTRY(prBSSDescList, prBssDesc);
/* Return this BSS Desc to the free BSS Desc list. */
LINK_INSERT_TAIL(prFreeBSSDescList, &prBssDesc->rLinkEntry);
}
}
} /* end of scanRemoveBssDescByBand() */
/*----------------------------------------------------------------------------*/
/*!
* @brief Clear the CONNECTION FLAG of a specified BSS Descriptor.
*
* @param[in] aucBSSID Given BSSID.
*
* @return (none)
*/
/*----------------------------------------------------------------------------*/
VOID scanRemoveConnFlagOfBssDescByBssid(IN P_ADAPTER_T prAdapter, IN UINT_8 aucBSSID[])
{
P_SCAN_INFO_T prScanInfo;
P_LINK_T prBSSDescList;
P_BSS_DESC_T prBssDesc = (P_BSS_DESC_T) NULL;
ASSERT(prAdapter);
ASSERT(aucBSSID);
prScanInfo = &(prAdapter->rWifiVar.rScanInfo);
prBSSDescList = &prScanInfo->rBSSDescList;
/* Search BSS Desc from current SCAN result list. */
LINK_FOR_EACH_ENTRY(prBssDesc, prBSSDescList, rLinkEntry, BSS_DESC_T) {
if (EQUAL_MAC_ADDR(prBssDesc->aucBSSID, aucBSSID)) {
prBssDesc->fgIsConnected = FALSE;
prBssDesc->fgIsConnecting = FALSE;
/* BSSID is not unique, so need to traverse whols link-list */
}
}
return;
} /* end of scanRemoveConnectionFlagOfBssDescByBssid() */
/*----------------------------------------------------------------------------*/
/*!
* @brief Allocate new BSS_DESC_T
*
* @param[in] prAdapter Pointer to the Adapter structure.
*
* @return Pointer to BSS Descriptor, if has free space. NULL, if has no space.
*/
/*----------------------------------------------------------------------------*/
P_BSS_DESC_T scanAllocateBssDesc(IN P_ADAPTER_T prAdapter)
{
P_SCAN_INFO_T prScanInfo;
P_LINK_T prFreeBSSDescList;
P_BSS_DESC_T prBssDesc;
ASSERT(prAdapter);
prScanInfo = &(prAdapter->rWifiVar.rScanInfo);
prFreeBSSDescList = &prScanInfo->rFreeBSSDescList;
LINK_REMOVE_HEAD(prFreeBSSDescList, prBssDesc, P_BSS_DESC_T);
if (prBssDesc) {
P_LINK_T prBSSDescList;
kalMemZero(prBssDesc, sizeof(BSS_DESC_T));
#if CFG_ENABLE_WIFI_DIRECT
LINK_INITIALIZE(&(prBssDesc->rP2pDeviceList));
prBssDesc->fgIsP2PPresent = FALSE;
#endif /* CFG_ENABLE_WIFI_DIRECT */
prBSSDescList = &prScanInfo->rBSSDescList;
/* NOTE(Kevin): In current design, this new empty BSS_DESC_T will be
* inserted to BSSDescList immediately.
*/
LINK_INSERT_TAIL(prBSSDescList, &prBssDesc->rLinkEntry);
}
return prBssDesc;
} /* end of scanAllocateBssDesc() */
/*----------------------------------------------------------------------------*/
/*!
* @brief This API parses Beacon/ProbeResp frame and insert extracted BSS_DESC_T
* with IEs into prAdapter->rWifiVar.rScanInfo.aucScanBuffer
*
* @param[in] prAdapter Pointer to the Adapter structure.
* @param[in] prSwRfb Pointer to the receiving frame buffer.
*
* @return Pointer to BSS Descriptor
* NULL if the Beacon/ProbeResp frame is invalid
*/
/*----------------------------------------------------------------------------*/
P_BSS_DESC_T scanAddToBssDesc(IN P_ADAPTER_T prAdapter, IN P_SW_RFB_T prSwRfb)
{
P_BSS_DESC_T prBssDesc = NULL;
UINT_16 u2CapInfo;
ENUM_BSS_TYPE_T eBSSType = BSS_TYPE_INFRASTRUCTURE;
PUINT_8 pucIE;
UINT_16 u2IELength;
UINT_16 u2Offset = 0;
P_WLAN_BEACON_FRAME_T prWlanBeaconFrame = (P_WLAN_BEACON_FRAME_T) NULL;
P_IE_SSID_T prIeSsid = (P_IE_SSID_T) NULL;
P_IE_SUPPORTED_RATE_T prIeSupportedRate = (P_IE_SUPPORTED_RATE_T) NULL;
P_IE_EXT_SUPPORTED_RATE_T prIeExtSupportedRate = (P_IE_EXT_SUPPORTED_RATE_T) NULL;
UINT_8 ucHwChannelNum = 0;
UINT_8 ucIeDsChannelNum = 0;
UINT_8 ucIeHtChannelNum = 0;
BOOLEAN fgIsValidSsid = FALSE, fgEscape = FALSE;
PARAM_SSID_T rSsid;
UINT_64 u8Timestamp;
BOOLEAN fgIsNewBssDesc = FALSE;
UINT_32 i;
UINT_8 ucSSIDChar;
/* PUINT_8 pucDumpIE; */
ASSERT(prAdapter);
ASSERT(prSwRfb);
prWlanBeaconFrame = (P_WLAN_BEACON_FRAME_T) prSwRfb->pvHeader;
WLAN_GET_FIELD_16(&prWlanBeaconFrame->u2CapInfo, &u2CapInfo);
WLAN_GET_FIELD_64(&prWlanBeaconFrame->au4Timestamp[0], &u8Timestamp);
/* decide BSS type */
switch (u2CapInfo & CAP_INFO_BSS_TYPE) {
case CAP_INFO_ESS:
/* It can also be Group Owner of P2P Group. */
eBSSType = BSS_TYPE_INFRASTRUCTURE;
break;
case CAP_INFO_IBSS:
eBSSType = BSS_TYPE_IBSS;
break;
case 0:
/* The P2P Device shall set the ESS bit of the Capabilities field
* in the Probe Response fame to 0 and IBSS bit to 0. (3.1.2.1.1)
*/
eBSSType = BSS_TYPE_P2P_DEVICE;
break;
#if CFG_ENABLE_BT_OVER_WIFI
/* @TODO: add rule to identify BOW beacons */
#endif
default:
return NULL;
}
/* 4 <1.1> Pre-parse SSID IE */
pucIE = prWlanBeaconFrame->aucInfoElem;
u2IELength = (prSwRfb->u2PacketLen - prSwRfb->u2HeaderLen) -
(UINT_16) OFFSET_OF(WLAN_BEACON_FRAME_BODY_T, aucInfoElem[0]);
if (u2IELength > CFG_IE_BUFFER_SIZE)
u2IELength = CFG_IE_BUFFER_SIZE;
IE_FOR_EACH(pucIE, u2IELength, u2Offset) {
switch (IE_ID(pucIE)) {
case ELEM_ID_SSID:
if (IE_LEN(pucIE) <= ELEM_MAX_LEN_SSID) {
ucSSIDChar = '\0';
/* D-Link DWL-900AP+ */
if (IE_LEN(pucIE) == 0)
fgIsValidSsid = FALSE;
/* Cisco AP1230A - (IE_LEN(pucIE) == 1) && (SSID_IE(pucIE)->aucSSID[0] == '\0') */
/* Linksys WRK54G/WL520g - (IE_LEN(pucIE) == n) &&
* (SSID_IE(pucIE)->aucSSID[0~(n-1)] == '\0')
*/
else {
for (i = 0; i < IE_LEN(pucIE); i++)
ucSSIDChar |= SSID_IE(pucIE)->aucSSID[i];
if (ucSSIDChar)
fgIsValidSsid = TRUE;
}
/* Update SSID to BSS Descriptor only if SSID is not hidden. */
if (fgIsValidSsid == TRUE) {
COPY_SSID(rSsid.aucSsid,
rSsid.u4SsidLen, SSID_IE(pucIE)->aucSSID, SSID_IE(pucIE)->ucLength);
}
}
fgEscape = TRUE;
break;
default:
break;
}
if (fgEscape == TRUE)
break;
}
/* 4 <1.2> Replace existing BSS_DESC_T or allocate a new one */
prBssDesc = scanSearchExistingBssDescWithSsid(prAdapter,
eBSSType,
(PUINT_8) prWlanBeaconFrame->aucBSSID,
(PUINT_8) prWlanBeaconFrame->aucSrcAddr,
fgIsValidSsid, fgIsValidSsid == TRUE ? &rSsid : NULL);
if (prBssDesc == (P_BSS_DESC_T) NULL) {
fgIsNewBssDesc = TRUE;
do {
/* 4 <1.2.1> First trial of allocation */
prBssDesc = scanAllocateBssDesc(prAdapter);
if (prBssDesc)
break;
/* 4 <1.2.2> Hidden is useless, remove the oldest hidden ssid. (for passive scan) */
scanRemoveBssDescsByPolicy(prAdapter,
(SCN_RM_POLICY_EXCLUDE_CONNECTED |
SCN_RM_POLICY_OLDEST_HIDDEN | SCN_RM_POLICY_TIMEOUT |
SCN_RM_POLICY_EXCLUDE_SPECIFIC_SSID));
/* 4 <1.2.3> Second tail of allocation */
prBssDesc = scanAllocateBssDesc(prAdapter);
if (prBssDesc)
break;
/* 4 <1.2.4> Remove the weakest one */
/* If there are more than half of BSS which has the same ssid as connection
* setting, remove the weakest one from them.
* Else remove the weakest one.
*/
scanRemoveBssDescsByPolicy(prAdapter,
(SCN_RM_POLICY_EXCLUDE_CONNECTED |
SCN_RM_POLICY_SMART_WEAKEST |
SCN_RM_POLICY_EXCLUDE_SPECIFIC_SSID));
/* 4 <1.2.5> reallocation */
prBssDesc = scanAllocateBssDesc(prAdapter);
if (prBssDesc)
break;
/* 4 <1.2.6> no space, should not happen */
/* ASSERT(0); // still no space available ? */
return NULL;
} while (FALSE);
} else {
OS_SYSTIME rCurrentTime;
/* WCXRP00000091 */
/* if the received strength is much weaker than the original one, */
/* ignore it due to it might be received on the folding frequency */
GET_CURRENT_SYSTIME(&rCurrentTime);
ASSERT(prSwRfb->prRxStatusGroup3);
if (prBssDesc->eBSSType != eBSSType) {
prBssDesc->eBSSType = eBSSType;
} else if (HAL_RX_STATUS_GET_CHNL_NUM(prSwRfb->prRxStatus) !=
prBssDesc->ucChannelNum
&& prBssDesc->ucRCPI > nicRxGetRcpiValueFromRxv(RCPI_MODE_WF0, prSwRfb)) {
/* for signal strength is too much weaker and previous beacon is not stale */
ASSERT(prSwRfb->prRxStatusGroup3);
if ((prBssDesc->ucRCPI -
nicRxGetRcpiValueFromRxv(RCPI_MODE_WF0, prSwRfb)) >=
REPLICATED_BEACON_STRENGTH_THRESHOLD
&& rCurrentTime - prBssDesc->rUpdateTime <= REPLICATED_BEACON_FRESH_PERIOD) {
return prBssDesc;
}
/* for received beacons too close in time domain */
else if (rCurrentTime - prBssDesc->rUpdateTime <= REPLICATED_BEACON_TIME_THRESHOLD)
return prBssDesc;
}
/* if Timestamp has been reset, re-generate BSS DESC 'cause AP should have reset itself */
if (prBssDesc->eBSSType == BSS_TYPE_INFRASTRUCTURE && u8Timestamp < prBssDesc->u8TimeStamp.QuadPart) {
BOOLEAN fgIsConnected, fgIsConnecting;
/* set flag for indicating this is a new BSS-DESC */
fgIsNewBssDesc = TRUE;
/* backup 2 flags for APs which reset timestamp unexpectedly */
fgIsConnected = prBssDesc->fgIsConnected;
fgIsConnecting = prBssDesc->fgIsConnecting;
scanRemoveBssDescByBssid(prAdapter, prBssDesc->aucBSSID);
prBssDesc = scanAllocateBssDesc(prAdapter);
if (!prBssDesc)
return NULL;
/* restore */
prBssDesc->fgIsConnected = fgIsConnected;
prBssDesc->fgIsConnecting = fgIsConnecting;
}
}
#if 1
prBssDesc->u2RawLength = prSwRfb->u2PacketLen;
kalMemCopy(prBssDesc->aucRawBuf, prWlanBeaconFrame, prBssDesc->u2RawLength);
#endif
/* NOTE: Keep consistency of Scan Record during JOIN process */
if (fgIsNewBssDesc == FALSE && prBssDesc->fgIsConnecting)
return prBssDesc;
/* 4 <2> Get information from Fixed Fields */
prBssDesc->eBSSType = eBSSType; /* Update the latest BSS type information. */
COPY_MAC_ADDR(prBssDesc->aucSrcAddr, prWlanBeaconFrame->aucSrcAddr);
COPY_MAC_ADDR(prBssDesc->aucBSSID, prWlanBeaconFrame->aucBSSID);
prBssDesc->u8TimeStamp.QuadPart = u8Timestamp;
WLAN_GET_FIELD_16(&prWlanBeaconFrame->u2BeaconInterval, &prBssDesc->u2BeaconInterval);
prBssDesc->u2CapInfo = u2CapInfo;
/* 4 <2.1> Retrieve IEs for later parsing */
u2IELength = (prSwRfb->u2PacketLen - prSwRfb->u2HeaderLen) -
(UINT_16) OFFSET_OF(WLAN_BEACON_FRAME_BODY_T, aucInfoElem[0]);
if (u2IELength > CFG_IE_BUFFER_SIZE) {
u2IELength = CFG_IE_BUFFER_SIZE;
prBssDesc->fgIsIEOverflow = TRUE;
} else {
prBssDesc->fgIsIEOverflow = FALSE;
}
prBssDesc->u2IELength = u2IELength;
kalMemCopy(prBssDesc->aucIEBuf, prWlanBeaconFrame->aucInfoElem, u2IELength);
/* 4 <2.2> reset prBssDesc variables in case that AP has been reconfigured */
prBssDesc->fgIsERPPresent = FALSE;
prBssDesc->fgIsHTPresent = FALSE;
prBssDesc->fgIsVHTPresent = FALSE;
prBssDesc->eSco = CHNL_EXT_SCN;
prBssDesc->fgIEWAPI = FALSE;
prBssDesc->fgIERSN = FALSE;
prBssDesc->fgIEWPA = FALSE;
prBssDesc->eChannelWidth = CW_20_40MHZ; /*Reset VHT OP IE relative settings */
prBssDesc->ucCenterFreqS1 = 0;
prBssDesc->ucCenterFreqS2 = 0;
/* 4 <3.1> Full IE parsing on SW_RFB_T */
pucIE = prWlanBeaconFrame->aucInfoElem;
/* pucDumpIE = pucIE; */
IE_FOR_EACH(pucIE, u2IELength, u2Offset) {
switch (IE_ID(pucIE)) {
case ELEM_ID_SSID:
if ((!prIeSsid) && /* NOTE(Kevin): for Atheros IOT #1 */
(IE_LEN(pucIE) <= ELEM_MAX_LEN_SSID)) {
BOOLEAN fgIsHiddenSSID = FALSE;
ucSSIDChar = '\0';
prIeSsid = (P_IE_SSID_T) pucIE;
/* D-Link DWL-900AP+ */
if (IE_LEN(pucIE) == 0)
fgIsHiddenSSID = TRUE;
/* Cisco AP1230A - (IE_LEN(pucIE) == 1) && (SSID_IE(pucIE)->aucSSID[0] == '\0') */
/* Linksys WRK54G/WL520g - (IE_LEN(pucIE) == n) &&
* (SSID_IE(pucIE)->aucSSID[0~(n-1)] == '\0') =
*/
else {
for (i = 0; i < IE_LEN(pucIE); i++)
ucSSIDChar |= SSID_IE(pucIE)->aucSSID[i];
if (!ucSSIDChar)
fgIsHiddenSSID = TRUE;
}
/* Update SSID to BSS Descriptor only if SSID is not hidden. */
if (!fgIsHiddenSSID) {
COPY_SSID(prBssDesc->aucSSID,
prBssDesc->ucSSIDLen,
SSID_IE(pucIE)->aucSSID, SSID_IE(pucIE)->ucLength);
}
}
break;
case ELEM_ID_SUP_RATES:
/* NOTE(Kevin): Buffalo WHR-G54S's supported rate set IE exceed 8.
* IE_LEN(pucIE) == 12, "1(B), 2(B), 5.5(B), 6(B), 9(B), 11(B),
* 12(B), 18(B), 24(B), 36(B), 48(B), 54(B)"
*/
/* TP-LINK will set extra and incorrect ie with ELEM_ID_SUP_RATES */
if ((!prIeSupportedRate) && (IE_LEN(pucIE) <= RATE_NUM_SW))
prIeSupportedRate = SUP_RATES_IE(pucIE);
break;
case ELEM_ID_DS_PARAM_SET:
if (IE_LEN(pucIE) == ELEM_MAX_LEN_DS_PARAMETER_SET)
ucIeDsChannelNum = DS_PARAM_IE(pucIE)->ucCurrChnl;
break;
case ELEM_ID_TIM:
if (IE_LEN(pucIE) <= ELEM_MAX_LEN_TIM)
prBssDesc->ucDTIMPeriod = TIM_IE(pucIE)->ucDTIMPeriod;
break;
case ELEM_ID_IBSS_PARAM_SET:
if (IE_LEN(pucIE) == ELEM_MAX_LEN_IBSS_PARAMETER_SET)
prBssDesc->u2ATIMWindow = IBSS_PARAM_IE(pucIE)->u2ATIMWindow;
break;
#if 0 /* CFG_SUPPORT_802_11D */
case ELEM_ID_COUNTRY_INFO:
prBssDesc->prIECountry = (P_IE_COUNTRY_T) pucIE;
break;
#endif
case ELEM_ID_ERP_INFO:
if (IE_LEN(pucIE) == ELEM_MAX_LEN_ERP)
prBssDesc->fgIsERPPresent = TRUE;
break;
case ELEM_ID_EXTENDED_SUP_RATES:
if (!prIeExtSupportedRate)
prIeExtSupportedRate = EXT_SUP_RATES_IE(pucIE);
break;
case ELEM_ID_RSN:
if (rsnParseRsnIE(prAdapter, RSN_IE(pucIE), &prBssDesc->rRSNInfo)) {
prBssDesc->fgIERSN = TRUE;
prBssDesc->u2RsnCap = prBssDesc->rRSNInfo.u2RsnCap;
if (prAdapter->rWifiVar.rConnSettings.eAuthMode == AUTH_MODE_WPA2)
rsnCheckPmkidCache(prAdapter, prBssDesc);
}
break;
case ELEM_ID_HT_CAP:
prBssDesc->fgIsHTPresent = TRUE;
break;
case ELEM_ID_HT_OP:
if (IE_LEN(pucIE) != (sizeof(IE_HT_OP_T) - 2))
break;
if ((((P_IE_HT_OP_T) pucIE)->ucInfo1 & HT_OP_INFO1_SCO) != CHNL_EXT_RES) {
prBssDesc->eSco = (ENUM_CHNL_EXT_T)
(((P_IE_HT_OP_T) pucIE)->ucInfo1 & HT_OP_INFO1_SCO);
}
ucIeHtChannelNum = ((P_IE_HT_OP_T) pucIE)->ucPrimaryChannel;
break;
case ELEM_ID_VHT_CAP:
prBssDesc->fgIsVHTPresent = TRUE;
#if CFG_SUPPORT_BFEE
prBssDesc->ucVhtCapNumSoundingDimensions =
((((P_IE_VHT_CAP_T) pucIE)->u4VhtCapInfo) & VHT_CAP_INFO_NUMBER_OF_SOUNDING_DIMENSIONS)
>> VHT_CAP_INFO_NUMBER_OF_SOUNDING_DIMENSIONS_OFFSET;
#endif
break;
case ELEM_ID_VHT_OP:
if (IE_LEN(pucIE) != (sizeof(IE_VHT_OP_T) - 2))
break;
prBssDesc->eChannelWidth = (ENUM_CHANNEL_WIDTH_T) (((P_IE_VHT_OP_T) pucIE)->ucVhtOperation[0]);
prBssDesc->ucCenterFreqS1 = (ENUM_CHANNEL_WIDTH_T) (((P_IE_VHT_OP_T) pucIE)->ucVhtOperation[1]);
prBssDesc->ucCenterFreqS2 = (ENUM_CHANNEL_WIDTH_T) (((P_IE_VHT_OP_T) pucIE)->ucVhtOperation[2]);
/*add IEEE BW160 patch*/
rlmModifyVhtBwPara(&prBssDesc->ucCenterFreqS1,
&prBssDesc->ucCenterFreqS2,
(PUINT_8)&prBssDesc->eChannelWidth);
break;
#if CFG_SUPPORT_WAPI
case ELEM_ID_WAPI:
if (wapiParseWapiIE(WAPI_IE(pucIE), &prBssDesc->rIEWAPI))
prBssDesc->fgIEWAPI = TRUE;
break;
#endif
case ELEM_ID_VENDOR: /* ELEM_ID_P2P, ELEM_ID_WMM */
{
UINT_8 ucOuiType;
UINT_16 u2SubTypeVersion;
if (rsnParseCheckForWFAInfoElem(prAdapter, pucIE, &ucOuiType, &u2SubTypeVersion)) {
if ((ucOuiType == VENDOR_OUI_TYPE_WPA)
&& (u2SubTypeVersion == VERSION_WPA)
&& (rsnParseWpaIE(prAdapter, WPA_IE(pucIE), &prBssDesc->rWPAInfo))) {
prBssDesc->fgIEWPA = TRUE;
}
}
#if CFG_ENABLE_WIFI_DIRECT
if (prAdapter->fgIsP2PRegistered) {
if ((p2pFuncParseCheckForP2PInfoElem(prAdapter, pucIE, &ucOuiType))
&& (ucOuiType == VENDOR_OUI_TYPE_P2P)) {
prBssDesc->fgIsP2PPresent = TRUE;
}
}
#endif /* CFG_ENABLE_WIFI_DIRECT */
}
break;
/* no default */
}
}
/* 4 <3.2> Save information from IEs - SSID */
/* Update Flag of Hidden SSID for used in SEARCH STATE. */
/* NOTE(Kevin): in current driver, the ucSSIDLen == 0 represent
* all cases of hidden SSID.
* If the fgIsHiddenSSID == TRUE, it means we didn't get the ProbeResp with
* valid SSID.
*/
if (prBssDesc->ucSSIDLen == 0)
prBssDesc->fgIsHiddenSSID = TRUE;
else
prBssDesc->fgIsHiddenSSID = FALSE;
/* 4 <3.3> Check rate information in related IEs. */
if (prIeSupportedRate || prIeExtSupportedRate) {
rateGetRateSetFromIEs(prIeSupportedRate,
prIeExtSupportedRate,
&prBssDesc->u2OperationalRateSet,
&prBssDesc->u2BSSBasicRateSet, &prBssDesc->fgIsUnknownBssBasicRate);
}
/* 4 <4> Update information from HIF RX Header */
{
P_HW_MAC_RX_DESC_T prRxStatus;
UINT_8 ucRxRCPI;
prRxStatus = prSwRfb->prRxStatus;
ASSERT(prRxStatus);
/* 4 <4.1> Get TSF comparison result */
prBssDesc->fgIsLargerTSF = HAL_RX_STATUS_GET_TCL(prRxStatus);
/* 4 <4.2> Get Band information */
prBssDesc->eBand = HAL_RX_STATUS_GET_RF_BAND(prRxStatus);
/* 4 <4.2> Get channel and RCPI information */
ucHwChannelNum = HAL_RX_STATUS_GET_CHNL_NUM(prRxStatus);
ASSERT(prSwRfb->prRxStatusGroup3);
ucRxRCPI = nicRxGetRcpiValueFromRxv(RCPI_MODE_WF0, prSwRfb);
if (prBssDesc->eBand == BAND_2G4) {
/* Update RCPI if in right channel */
if (ucIeDsChannelNum >= 1 && ucIeDsChannelNum <= 14) {
/* Receive Beacon/ProbeResp frame from adjacent channel. */
if ((ucIeDsChannelNum == ucHwChannelNum) || (ucRxRCPI > prBssDesc->ucRCPI))
prBssDesc->ucRCPI = ucRxRCPI;
/* trust channel information brought by IE */
prBssDesc->ucChannelNum = ucIeDsChannelNum;
} else if (ucIeHtChannelNum >= 1 && ucIeHtChannelNum <= 14) {
/* Receive Beacon/ProbeResp frame from adjacent channel. */
if ((ucIeHtChannelNum == ucHwChannelNum) || (ucRxRCPI > prBssDesc->ucRCPI))
prBssDesc->ucRCPI = ucRxRCPI;
/* trust channel information brought by IE */
prBssDesc->ucChannelNum = ucIeHtChannelNum;
} else {
prBssDesc->ucRCPI = ucRxRCPI;
prBssDesc->ucChannelNum = ucHwChannelNum;
}
}
/* 5G Band */
else {
if (ucIeHtChannelNum >= 1 && ucIeHtChannelNum < 200) {
/* Receive Beacon/ProbeResp frame from adjacent channel. */
if ((ucIeHtChannelNum == ucHwChannelNum) || (ucRxRCPI > prBssDesc->ucRCPI))
prBssDesc->ucRCPI = ucRxRCPI;
/* trust channel information brought by IE */
prBssDesc->ucChannelNum = ucIeHtChannelNum;
} else {
/* Always update RCPI */
prBssDesc->ucRCPI = ucRxRCPI;
prBssDesc->ucChannelNum = ucHwChannelNum;
}
}
}
/* 4 <5> Check IE information corret or not */
if (!rlmDomainIsValidRfSetting(prAdapter, prBssDesc->eBand, prBssDesc->ucChannelNum, prBssDesc->eSco,
prBssDesc->eChannelWidth, prBssDesc->ucCenterFreqS1,
prBssDesc->ucCenterFreqS2)) {
/* Dump IE Inforamtion */
/* DBGLOG(RLM, WARN, "ScanAddToBssDesc IE Information\n"); */
/* DBGLOG(RLM, WARN, "IE Length = %d\n", u2IELength); */
/* DBGLOG_MEM8(RLM, WARN, pucDumpIE, u2IELength); */
/* Error Handling for Non-predicted IE - Fixed to set 20MHz */
prBssDesc->eChannelWidth = CW_20_40MHZ;
prBssDesc->ucCenterFreqS1 = 0;
prBssDesc->ucCenterFreqS2 = 0;
prBssDesc->eSco = CHNL_EXT_SCN;
}
/* 4 <6> PHY type setting */
prBssDesc->ucPhyTypeSet = 0;
if (prBssDesc->eBand == BAND_2G4) {
/* check if support 11n */
if (prBssDesc->fgIsHTPresent)
prBssDesc->ucPhyTypeSet |= PHY_TYPE_BIT_HT;
/* if not 11n only */
if (!(prBssDesc->u2BSSBasicRateSet & RATE_SET_BIT_HT_PHY)) {
/* check if support 11g */
if ((prBssDesc->u2OperationalRateSet & RATE_SET_OFDM) || prBssDesc->fgIsERPPresent)
prBssDesc->ucPhyTypeSet |= PHY_TYPE_BIT_ERP;
/* if not 11g only */
if (!(prBssDesc->u2BSSBasicRateSet & RATE_SET_OFDM)) {
/* check if support 11b */
if ((prBssDesc->u2OperationalRateSet & RATE_SET_HR_DSSS))
prBssDesc->ucPhyTypeSet |= PHY_TYPE_BIT_HR_DSSS;
}
}
} else { /* (BAND_5G == prBssDesc->eBande) */
/* check if support 11n */
if (prBssDesc->fgIsVHTPresent)
prBssDesc->ucPhyTypeSet |= PHY_TYPE_BIT_VHT;
if (prBssDesc->fgIsHTPresent)
prBssDesc->ucPhyTypeSet |= PHY_TYPE_BIT_HT;
/* if not 11n only */
if (!(prBssDesc->u2BSSBasicRateSet & RATE_SET_BIT_HT_PHY)) {
/* Support 11a definitely */
prBssDesc->ucPhyTypeSet |= PHY_TYPE_BIT_OFDM;
/* ASSERT(!(prBssDesc->u2OperationalRateSet & RATE_SET_HR_DSSS)); */
}
}
/* 4 <7> Update BSS_DESC_T's Last Update TimeStamp. */
GET_CURRENT_SYSTIME(&prBssDesc->rUpdateTime);
return prBssDesc;
}
/*----------------------------------------------------------------------------*/
/*!
* @brief Convert the Beacon or ProbeResp Frame in SW_RFB_T to scan result for query
*
* @param[in] prSwRfb Pointer to the receiving SW_RFB_T structure.
*
* @retval WLAN_STATUS_SUCCESS It is a valid Scan Result and been sent to the host.
* @retval WLAN_STATUS_FAILURE It is not a valid Scan Result.
*/
/*----------------------------------------------------------------------------*/
WLAN_STATUS scanAddScanResult(IN P_ADAPTER_T prAdapter, IN P_BSS_DESC_T prBssDesc, IN P_SW_RFB_T prSwRfb)
{
P_SCAN_INFO_T prScanInfo;
UINT_8 aucRatesEx[PARAM_MAX_LEN_RATES_EX];
P_WLAN_BEACON_FRAME_T prWlanBeaconFrame;
PARAM_MAC_ADDRESS rMacAddr;
PARAM_SSID_T rSsid;
ENUM_PARAM_NETWORK_TYPE_T eNetworkType;
PARAM_802_11_CONFIG_T rConfiguration;
ENUM_PARAM_OP_MODE_T eOpMode;
UINT_8 ucRateLen = 0;
UINT_32 i;
ASSERT(prAdapter);
ASSERT(prSwRfb);
prScanInfo = &(prAdapter->rWifiVar.rScanInfo);
if (prBssDesc->eBand == BAND_2G4) {
if ((prBssDesc->u2OperationalRateSet & RATE_SET_OFDM)
|| prBssDesc->fgIsERPPresent) {
eNetworkType = PARAM_NETWORK_TYPE_OFDM24;
} else {
eNetworkType = PARAM_NETWORK_TYPE_DS;
}
} else {
ASSERT(prBssDesc->eBand == BAND_5G);
eNetworkType = PARAM_NETWORK_TYPE_OFDM5;
}
if (prBssDesc->eBSSType == BSS_TYPE_P2P_DEVICE) {
/* NOTE(Kevin): Not supported by WZC(TBD) */
return WLAN_STATUS_FAILURE;
}
prWlanBeaconFrame = (P_WLAN_BEACON_FRAME_T) prSwRfb->pvHeader;
COPY_MAC_ADDR(rMacAddr, prWlanBeaconFrame->aucBSSID);
COPY_SSID(rSsid.aucSsid, rSsid.u4SsidLen, prBssDesc->aucSSID, prBssDesc->ucSSIDLen);
rConfiguration.u4Length = sizeof(PARAM_802_11_CONFIG_T);
rConfiguration.u4BeaconPeriod = (UINT_32) prWlanBeaconFrame->u2BeaconInterval;
rConfiguration.u4ATIMWindow = prBssDesc->u2ATIMWindow;
rConfiguration.u4DSConfig = nicChannelNum2Freq(prBssDesc->ucChannelNum);
rConfiguration.rFHConfig.u4Length = sizeof(PARAM_802_11_CONFIG_FH_T);
rateGetDataRatesFromRateSet(prBssDesc->u2OperationalRateSet, 0, aucRatesEx, &ucRateLen);
/* NOTE(Kevin): Set unused entries, if any, at the end of the array to 0.
* from OID_802_11_BSSID_LIST
*/
for (i = ucRateLen; i < ARRAY_SIZE(aucRatesEx); i++)
aucRatesEx[i] = 0;
switch (prBssDesc->eBSSType) {
case BSS_TYPE_IBSS:
eOpMode = NET_TYPE_IBSS;
break;
case BSS_TYPE_INFRASTRUCTURE:
case BSS_TYPE_P2P_DEVICE:
case BSS_TYPE_BOW_DEVICE:
default:
eOpMode = NET_TYPE_INFRA;
break;
}
DBGLOG(SCN, TRACE, "ind %s %d %d\n", prBssDesc->aucSSID, prBssDesc->ucChannelNum, prBssDesc->ucRCPI);
kalIndicateBssInfo(prAdapter->prGlueInfo,
(PUINT_8) prSwRfb->pvHeader,
prSwRfb->u2PacketLen, prBssDesc->ucChannelNum, RCPI_TO_dBm(prBssDesc->ucRCPI));
nicAddScanResult(prAdapter,
rMacAddr,
&rSsid,
prWlanBeaconFrame->u2CapInfo & CAP_INFO_PRIVACY ? 1 : 0,
RCPI_TO_dBm(prBssDesc->ucRCPI),
eNetworkType,
&rConfiguration,
eOpMode,
aucRatesEx,
prSwRfb->u2PacketLen - prSwRfb->u2HeaderLen,
(PUINT_8) ((ULONG) (prSwRfb->pvHeader) + WLAN_MAC_MGMT_HEADER_LEN));
return WLAN_STATUS_SUCCESS;
} /* end of scanAddScanResult() */
BOOLEAN scanCheckBssIsLegal(IN P_ADAPTER_T prAdapter, P_BSS_DESC_T prBssDesc)
{
BOOLEAN fgAddToScanResult = FALSE;
ENUM_BAND_T eBand;
UINT_8 ucChannel;
ASSERT(prAdapter);
/* check the channel is in the legal doamin */
if (rlmDomainIsLegalChannel(prAdapter, prBssDesc->eBand, prBssDesc->ucChannelNum) == TRUE) {
/* check ucChannelNum/eBand for adjacement channel filtering */
if (cnmAisInfraChannelFixed(prAdapter, &eBand, &ucChannel) == TRUE &&
(eBand != prBssDesc->eBand || ucChannel != prBssDesc->ucChannelNum)) {
fgAddToScanResult = FALSE;
} else {
fgAddToScanResult = TRUE;
}
}
return fgAddToScanResult;
}
/*----------------------------------------------------------------------------*/
/*!
* @brief Parse the content of given Beacon or ProbeResp Frame.
*
* @param[in] prSwRfb Pointer to the receiving SW_RFB_T structure.
*
* @retval WLAN_STATUS_SUCCESS if not report this SW_RFB_T to host
* @retval WLAN_STATUS_PENDING if report this SW_RFB_T to host as scan result
*/
/*----------------------------------------------------------------------------*/
WLAN_STATUS scanProcessBeaconAndProbeResp(IN P_ADAPTER_T prAdapter, IN P_SW_RFB_T prSwRfb)
{
P_SCAN_INFO_T prScanInfo;
P_CONNECTION_SETTINGS_T prConnSettings;
P_BSS_DESC_T prBssDesc = (P_BSS_DESC_T) NULL;
WLAN_STATUS rStatus = WLAN_STATUS_SUCCESS;
P_BSS_INFO_T prAisBssInfo;
P_WLAN_BEACON_FRAME_T prWlanBeaconFrame = (P_WLAN_BEACON_FRAME_T) NULL;
#if CFG_SLT_SUPPORT
P_SLT_INFO_T prSltInfo = (P_SLT_INFO_T) NULL;
#endif
ASSERT(prAdapter);
ASSERT(prSwRfb);
prScanInfo = &(prAdapter->rWifiVar.rScanInfo);
/* 4 <0> Ignore invalid Beacon Frame */
if ((prSwRfb->u2PacketLen - prSwRfb->u2HeaderLen) <
(TIMESTAMP_FIELD_LEN + BEACON_INTERVAL_FIELD_LEN + CAP_INFO_FIELD_LEN)) {
#ifndef _lint
ASSERT(0);
#endif /* _lint */
return rStatus;
}
#if CFG_SLT_SUPPORT
prSltInfo = &prAdapter->rWifiVar.rSltInfo;
if (prSltInfo->fgIsDUT) {
DBGLOG(P2P, INFO, "\n\rBCN: RX\n");
prSltInfo->u4BeaconReceiveCnt++;
return WLAN_STATUS_SUCCESS;
} else {
return WLAN_STATUS_SUCCESS;
}
#endif
prConnSettings = &(prAdapter->rWifiVar.rConnSettings);
prAisBssInfo = prAdapter->prAisBssInfo;
prWlanBeaconFrame = (P_WLAN_BEACON_FRAME_T) prSwRfb->pvHeader;
/* 4 <1> Parse and add into BSS_DESC_T */
prBssDesc = scanAddToBssDesc(prAdapter, prSwRfb);
if (prBssDesc) {
#if CFG_SUPPORT_BEACON_CHANGE_DETECTION
/* 4 <1.1> Beacon Change Detection for Connected BSS */
if (prAisBssInfo->eConnectionState == PARAM_MEDIA_STATE_CONNECTED &&
((prBssDesc->eBSSType == BSS_TYPE_INFRASTRUCTURE && prConnSettings->eOPMode != NET_TYPE_IBSS)
|| (prBssDesc->eBSSType == BSS_TYPE_IBSS && prConnSettings->eOPMode != NET_TYPE_INFRA))
&& EQUAL_MAC_ADDR(prBssDesc->aucBSSID, prAisBssInfo->aucBSSID)
&& EQUAL_SSID(prBssDesc->aucSSID, prBssDesc->ucSSIDLen, prAisBssInfo->aucSSID,
prAisBssInfo->ucSSIDLen)) {
BOOLEAN fgNeedDisconnect = FALSE;
/* <1.1.2> check if supported rate differs */
if (prAisBssInfo->u2OperationalRateSet != prBssDesc->u2OperationalRateSet)
fgNeedDisconnect = TRUE;
/* <1.1.3> beacon content change detected, disconnect immediately */
if (fgNeedDisconnect == TRUE)
aisBssBeaconTimeout(prAdapter);
}
#endif
/* 4 <1.1> Update AIS_BSS_INFO */
if (((prBssDesc->eBSSType == BSS_TYPE_INFRASTRUCTURE && prConnSettings->eOPMode != NET_TYPE_IBSS)
|| (prBssDesc->eBSSType == BSS_TYPE_IBSS && prConnSettings->eOPMode != NET_TYPE_INFRA))) {
if (prAisBssInfo->eConnectionState == PARAM_MEDIA_STATE_CONNECTED) {
/* *not* checking prBssDesc->fgIsConnected anymore,
* due to Linksys AP uses " " as hidden SSID, and would have different BSS descriptor
*/
if ((!prAisBssInfo->ucDTIMPeriod) &&
EQUAL_MAC_ADDR(prBssDesc->aucBSSID, prAisBssInfo->aucBSSID) &&
(prAisBssInfo->eCurrentOPMode == OP_MODE_INFRASTRUCTURE) &&
((prWlanBeaconFrame->u2FrameCtrl & MASK_FRAME_TYPE) == MAC_FRAME_BEACON)) {
prAisBssInfo->ucDTIMPeriod = prBssDesc->ucDTIMPeriod;
/* sync with firmware for beacon information */
nicPmIndicateBssConnected(prAdapter, prAisBssInfo->ucBssIndex);
}
}
#if CFG_SUPPORT_ADHOC
if (EQUAL_SSID(prBssDesc->aucSSID,
prBssDesc->ucSSIDLen,
prConnSettings->aucSSID,
prConnSettings->ucSSIDLen) &&
(prBssDesc->eBSSType == BSS_TYPE_IBSS) && (prAisBssInfo->eCurrentOPMode == OP_MODE_IBSS)) {
ASSERT(prSwRfb->prRxStatusGroup3);
ibssProcessMatchedBeacon(prAdapter, prAisBssInfo, prBssDesc,
nicRxGetRcpiValueFromRxv(RCPI_MODE_WF0, prSwRfb));
}
#endif /* CFG_SUPPORT_ADHOC */
}
rlmProcessBcn(prAdapter,
prSwRfb,
((P_WLAN_BEACON_FRAME_T) (prSwRfb->pvHeader))->aucInfoElem,
(prSwRfb->u2PacketLen - prSwRfb->u2HeaderLen) -
(UINT_16) (OFFSET_OF(WLAN_BEACON_FRAME_BODY_T, aucInfoElem[0])));
mqmProcessBcn(prAdapter,
prSwRfb,
((P_WLAN_BEACON_FRAME_T) (prSwRfb->pvHeader))->aucInfoElem,
(prSwRfb->u2PacketLen - prSwRfb->u2HeaderLen) -
(UINT_16) (OFFSET_OF(WLAN_BEACON_FRAME_BODY_T, aucInfoElem[0])));
/* 4 <3> Send SW_RFB_T to HIF when we perform SCAN for HOST */
if (prBssDesc->eBSSType == BSS_TYPE_INFRASTRUCTURE || prBssDesc->eBSSType == BSS_TYPE_IBSS) {
/* for AIS, send to host */
if (prConnSettings->fgIsScanReqIssued) {
BOOLEAN fgAddToScanResult;
fgAddToScanResult = scanCheckBssIsLegal(prAdapter, prBssDesc);
if (fgAddToScanResult == TRUE)
rStatus = scanAddScanResult(prAdapter, prBssDesc, prSwRfb);
}
}
#if CFG_ENABLE_WIFI_DIRECT
if (prAdapter->fgIsP2PRegistered)
scanP2pProcessBeaconAndProbeResp(prAdapter, prSwRfb, &rStatus, prBssDesc, prWlanBeaconFrame);
#endif
}
return rStatus;
} /* end of scanProcessBeaconAndProbeResp() */
/*----------------------------------------------------------------------------*/
/*!
* \brief Search the Candidate of BSS Descriptor for JOIN(Infrastructure) or
* MERGE(AdHoc) according to current Connection Policy.
*
* \return Pointer to BSS Descriptor, if found. NULL, if not found
*/
/*----------------------------------------------------------------------------*/
P_BSS_DESC_T scanSearchBssDescByPolicy(IN P_ADAPTER_T prAdapter, IN UINT_8 ucBssIndex)
{
P_CONNECTION_SETTINGS_T prConnSettings;
P_BSS_INFO_T prBssInfo;
P_AIS_SPECIFIC_BSS_INFO_T prAisSpecBssInfo;
P_SCAN_INFO_T prScanInfo;
P_LINK_T prBSSDescList;
P_BSS_DESC_T prBssDesc = (P_BSS_DESC_T) NULL;
P_BSS_DESC_T prPrimaryBssDesc = (P_BSS_DESC_T) NULL;
P_BSS_DESC_T prCandidateBssDesc = (P_BSS_DESC_T) NULL;
P_STA_RECORD_T prStaRec = (P_STA_RECORD_T) NULL;
P_STA_RECORD_T prPrimaryStaRec;
P_STA_RECORD_T prCandidateStaRec = (P_STA_RECORD_T) NULL;
OS_SYSTIME rCurrentTime;
/* The first one reach the check point will be our candidate */
BOOLEAN fgIsFindFirst = (BOOLEAN) FALSE;
BOOLEAN fgIsFindBestRSSI = (BOOLEAN) FALSE;
BOOLEAN fgIsFindBestEncryptionLevel = (BOOLEAN) FALSE;
/* BOOLEAN fgIsFindMinChannelLoad = (BOOLEAN)FALSE; */
/* TODO(Kevin): Support Min Channel Load */
/* UINT_8 aucChannelLoad[CHANNEL_NUM] = {0}; */
BOOLEAN fgIsFixedChannel;
ENUM_BAND_T eBand;
UINT_8 ucChannel;
ASSERT(prAdapter);
prConnSettings = &(prAdapter->rWifiVar.rConnSettings);
prBssInfo = GET_BSS_INFO_BY_INDEX(prAdapter, ucBssIndex);
prAisSpecBssInfo = &(prAdapter->rWifiVar.rAisSpecificBssInfo);
prScanInfo = &(prAdapter->rWifiVar.rScanInfo);
prBSSDescList = &prScanInfo->rBSSDescList;
GET_CURRENT_SYSTIME(&rCurrentTime);
/* check for fixed channel operation */
if (prBssInfo->eNetworkType == NETWORK_TYPE_AIS) {
#if CFG_SUPPORT_CHNL_CONFLICT_REVISE
fgIsFixedChannel = cnmAisDetectP2PChannel(prAdapter, &eBand, &ucChannel);
#else
fgIsFixedChannel = cnmAisInfraChannelFixed(prAdapter, &eBand, &ucChannel);
#endif
} else
fgIsFixedChannel = FALSE;
#if DBG
if (prConnSettings->ucSSIDLen < ELEM_MAX_LEN_SSID)
prConnSettings->aucSSID[prConnSettings->ucSSIDLen] = '\0';
#endif
#if 0
DBGLOG(SCN, INFO, "SEARCH: Num Of BSS_DESC_T = %d, Look for SSID: %s\n",
prBSSDescList->u4NumElem, prConnSettings->aucSSID);
#endif
/* 4 <1> The outer loop to search for a candidate. */
LINK_FOR_EACH_ENTRY(prBssDesc, prBSSDescList, rLinkEntry, BSS_DESC_T) {
/* TODO(Kevin): Update Minimum Channel Load Information here */
#if 0
DBGLOG(SCN, INFO, "SEARCH: [" MACSTR "], SSID:%s\n", MAC2STR(prBssDesc->aucBSSID), prBssDesc->aucSSID);
#endif
/* 4 <2> Check PHY Type and attributes */
/* 4 <2.1> Check Unsupported BSS PHY Type */
if (!(prBssDesc->ucPhyTypeSet & (prAdapter->rWifiVar.ucAvailablePhyTypeSet))) {
DBGLOG(SCN, INFO, "SEARCH: Ignore unsupported ucPhyTypeSet = %x\n", prBssDesc->ucPhyTypeSet);
continue;
}
/* 4 <2.2> Check if has unknown NonHT BSS Basic Rate Set. */
if (prBssDesc->fgIsUnknownBssBasicRate) {
DBGLOG(SCN, LOUD, "SEARCH: Ignore Unknown Bss Basic Rate\n");
continue;
}
/* 4 <2.3> Check if fixed operation cases should be aware */
if (fgIsFixedChannel == TRUE && (prBssDesc->eBand != eBand || prBssDesc->ucChannelNum != ucChannel)) {
DBGLOG(SCN, LOUD,
"SEARCH: Ignore BssBand[%d] != FixBand[%d] or BssCH[%d] != FixCH[%d]\n",
prBssDesc->eBand, eBand, prBssDesc->ucChannelNum, ucChannel);
continue;
}
/* 4 <2.4> Check if the channel is legal under regulatory domain */
if (rlmDomainIsLegalChannel(prAdapter, prBssDesc->eBand, prBssDesc->ucChannelNum) == FALSE) {
DBGLOG(SCN, LOUD, "SEARCH: Ignore illegal CH Band[%d] CH[%d]\n",
prBssDesc->eBand, prBssDesc->ucChannelNum);
continue;
}
/* 4 <2.5> Check if this BSS_DESC_T is stale */
if (CHECK_FOR_TIMEOUT(rCurrentTime, prBssDesc->rUpdateTime, SEC_TO_SYSTIME(SCN_BSS_DESC_STALE_SEC))) {
DBGLOG(SCN, LOUD, "SEARCH: Ignore stale Bss, CurrTime[%ld] BssUpdateTime[%ld]\n",
rCurrentTime, prBssDesc->rUpdateTime);
continue;
}
/* 4 <3> Check if reach the excessive join retry limit */
/* NOTE(Kevin): STA_RECORD_T is recorded by TA. */
prStaRec = cnmGetStaRecByAddress(prAdapter, ucBssIndex, prBssDesc->aucSrcAddr);
if (prStaRec) {
/* NOTE(Kevin):
* The Status Code is the result of a Previous Connection Request,
* we use this as SCORE for choosing a proper
* candidate (Also used for compare see <6>)
* The Reason Code is an indication of the reason why AP reject us,
* we use this Code for "Reject"
* a SCAN result to become our candidate(Like a blacklist).
*/
#if 0 /* TODO(Kevin): */
if (prStaRec->u2ReasonCode != REASON_CODE_RESERVED) {
DBGLOG(SCN, INFO,
"SEARCH: Ignore BSS with previous Reason Code = %d\n", prStaRec->u2ReasonCode);
continue;
} else
#endif
if (prStaRec->u2StatusCode != STATUS_CODE_SUCCESSFUL) {
/* NOTE(Kevin): greedy association - after timeout, we'll still
* try to associate to the AP whose STATUS of conection attempt
* was not success.
* We may also use (ucJoinFailureCount x JOIN_RETRY_INTERVAL_SEC) for
* time bound.
*/
if ((prStaRec->ucJoinFailureCount < JOIN_MAX_RETRY_FAILURE_COUNT) ||
(CHECK_FOR_TIMEOUT(rCurrentTime,
prStaRec->rLastJoinTime,
SEC_TO_SYSTIME(JOIN_RETRY_INTERVAL_SEC)))) {
/* NOTE(Kevin): Every JOIN_RETRY_INTERVAL_SEC interval, we can retry
* JOIN_MAX_RETRY_FAILURE_COUNT times.
*/
if (prStaRec->ucJoinFailureCount >= JOIN_MAX_RETRY_FAILURE_COUNT)
prStaRec->ucJoinFailureCount = 0;
DBGLOG(SCN, INFO,
"SEARCH:Try to join BSS again,Status Code=%d(Curr=%ld/Last Join=%ld)\n",
prStaRec->u2StatusCode, rCurrentTime, prStaRec->rLastJoinTime);
} else {
DBGLOG(SCN, INFO,
"SEARCH: Ignore BSS which reach maximum Join Retry Count = %d\n",
JOIN_MAX_RETRY_FAILURE_COUNT);
continue;
}
}
}
/* 4 <4> Check for various NETWORK conditions */
if (prBssInfo->eNetworkType == NETWORK_TYPE_AIS) {
/* 4 <4.1> Check BSS Type for the corresponding Operation Mode in Connection Setting */
/* NOTE(Kevin): For NET_TYPE_AUTO_SWITCH, we will always pass following check. */
if (((prConnSettings->eOPMode == NET_TYPE_INFRA) &&
(prBssDesc->eBSSType != BSS_TYPE_INFRASTRUCTURE)) ||
((prConnSettings->eOPMode == NET_TYPE_IBSS
|| prConnSettings->eOPMode == NET_TYPE_DEDICATED_IBSS)
&& (prBssDesc->eBSSType != BSS_TYPE_IBSS))) {
DBGLOG(SCN, INFO, "SEARCH: Ignore eBSSType = %s\n",
((prBssDesc->eBSSType == BSS_TYPE_INFRASTRUCTURE) ? "INFRASTRUCTURE" : "IBSS"));
continue;
}
/* 4 <4.2> Check AP's BSSID if OID_802_11_BSSID has been set. */
if ((prConnSettings->fgIsConnByBssidIssued) &&
(prBssDesc->eBSSType == BSS_TYPE_INFRASTRUCTURE)) {
if (UNEQUAL_MAC_ADDR(prConnSettings->aucBSSID, prBssDesc->aucBSSID)) {
DBGLOG(SCN, INFO, "SEARCH: Ignore due to BSSID was not matched!\n");
continue;
}
}
#if CFG_SUPPORT_ADHOC
/* 4 <4.3> Check for AdHoc Mode */
if (prBssDesc->eBSSType == BSS_TYPE_IBSS) {
OS_SYSTIME rCurrentTime;
/* 4 <4.3.1> Check if this SCAN record has been updated recently for IBSS. */
/* NOTE(Kevin): Because some STA may change its BSSID frequently after it
* create the IBSS - e.g. IPN2220, so we need to make sure we get the new one.
* For BSS, if the old record was matched, however it won't be able to pass
* the Join Process later.
*/
GET_CURRENT_SYSTIME(&rCurrentTime);
if (CHECK_FOR_TIMEOUT(rCurrentTime, prBssDesc->rUpdateTime,
SEC_TO_SYSTIME(SCN_ADHOC_BSS_DESC_TIMEOUT_SEC))) {
DBGLOG(SCN, LOUD,
"SEARCH: Skip old record of BSS Descriptor - BSSID:["
MACSTR "]\n\n", MAC2STR(prBssDesc->aucBSSID));
continue;
}
/* 4 <4.3.2> Check Peer's capability */
if (ibssCheckCapabilityForAdHocMode(prAdapter, prBssDesc) == WLAN_STATUS_FAILURE) {
DBGLOG(SCN, INFO,
"SEARCH: Ignore BSS DESC MAC: " MACSTR
", Capability is not supported for current AdHoc Mode.\n",
MAC2STR(prPrimaryBssDesc->aucBSSID));
continue;
}
/* 4 <4.3.3> Compare TSF */
if (prBssInfo->fgIsBeaconActivated &&
UNEQUAL_MAC_ADDR(prBssInfo->aucBSSID, prBssDesc->aucBSSID)) {
DBGLOG(SCN, LOUD,
"SEARCH: prBssDesc->fgIsLargerTSF = %d\n", prBssDesc->fgIsLargerTSF);
if (!prBssDesc->fgIsLargerTSF) {
DBGLOG(SCN, INFO,
"SEARCH: Ignore BSS DESC MAC: [" MACSTR
"], Smaller TSF\n", MAC2STR(prBssDesc->aucBSSID));
continue;
}
}
}
#endif /* CFG_SUPPORT_ADHOC */
}
#if 0 /* TODO(Kevin): For IBSS */
/* 4 <2.c> Check if this SCAN record has been updated recently for IBSS. */
/* NOTE(Kevin): Because some STA may change its BSSID frequently after it
* create the IBSS, so we need to make sure we get the new one.
* For BSS, if the old record was matched, however it won't be able to pass
* the Join Process later.
*/
if (prBssDesc->eBSSType == BSS_TYPE_IBSS) {
OS_SYSTIME rCurrentTime;
GET_CURRENT_SYSTIME(&rCurrentTime);
if (CHECK_FOR_TIMEOUT(rCurrentTime, prBssDesc->rUpdateTime,
SEC_TO_SYSTIME(BSS_DESC_TIMEOUT_SEC))) {
DBGLOG(SCAN, TRACE,
"Skip old record of BSS Descriptor - BSSID:[" MACSTR
"]\n\n", MAC2STR(prBssDesc->aucBSSID));
continue;
}
}
if ((prBssDesc->eBSSType == BSS_TYPE_INFRASTRUCTURE) &&
(prAdapter->eConnectionState == MEDIA_STATE_CONNECTED)) {
OS_SYSTIME rCurrentTime;
GET_CURRENT_SYSTIME(&rCurrentTime);
if (CHECK_FOR_TIMEOUT(rCurrentTime, prBssDesc->rUpdateTime,
SEC_TO_SYSTIME(BSS_DESC_TIMEOUT_SEC))) {
DBGLOG(SCAN, TRACE,
"Skip old record of BSS Descriptor - BSSID:[" MACSTR
"]\n\n", MAC2STR(prBssDesc->aucBSSID));
continue;
}
}
/* 4 <4B> Check for IBSS AdHoc Mode. */
/* Skip if one or more BSS Basic Rate are not supported by current AdHocMode */
if (prPrimaryBssDesc->eBSSType == BSS_TYPE_IBSS) {
/* 4 <4B.1> Check if match the Capability of current IBSS AdHoc Mode. */
if (ibssCheckCapabilityForAdHocMode(prAdapter, prPrimaryBssDesc) == WLAN_STATUS_FAILURE) {
DBGLOG(SCAN, TRACE,
"Ignore BSS DESC MAC: " MACSTR
", Capability is not supported for current AdHoc Mode.\n",
MAC2STR(prPrimaryBssDesc->aucBSSID));
continue;
}
/* 4 <4B.2> IBSS Merge Decision Flow for SEARCH STATE. */
if (prAdapter->fgIsIBSSActive &&
UNEQUAL_MAC_ADDR(prBssInfo->aucBSSID, prPrimaryBssDesc->aucBSSID)) {
if (!fgIsLocalTSFRead) {
NIC_GET_CURRENT_TSF(prAdapter, &rCurrentTsf);
DBGLOG(SCAN, TRACE,
"\n\nCurrent TSF : %08lx-%08lx\n\n",
rCurrentTsf.u.HighPart, rCurrentTsf.u.LowPart);
}
if (rCurrentTsf.QuadPart > prPrimaryBssDesc->u8TimeStamp.QuadPart) {
DBGLOG(SCAN, TRACE,
"Ignore BSS DESC MAC: [" MACSTR
"], Current BSSID: [" MACSTR "].\n",
MAC2STR(prPrimaryBssDesc->aucBSSID), MAC2STR(prBssInfo->aucBSSID));
DBGLOG(SCAN, TRACE,
"\n\nBSS's TSF : %08lx-%08lx\n\n",
prPrimaryBssDesc->u8TimeStamp.u.HighPart,
prPrimaryBssDesc->u8TimeStamp.u.LowPart);
prPrimaryBssDesc->fgIsLargerTSF = FALSE;
continue;
} else {
prPrimaryBssDesc->fgIsLargerTSF = TRUE;
}
}
}
/* 4 <5> Check the Encryption Status. */
if (rsnPerformPolicySelection(prPrimaryBssDesc)) {
if (prPrimaryBssDesc->ucEncLevel > 0) {
fgIsFindBestEncryptionLevel = TRUE;
fgIsFindFirst = FALSE;
}
} else {
/* Can't pass the Encryption Status Check, get next one */
continue;
}
/* For RSN Pre-authentication, update the PMKID canidate list for
* same SSID and encrypt status
*/
/* Update PMKID candicate list. */
if (prAdapter->rWifiVar.rConnSettings.eAuthMode == AUTH_MODE_WPA2) {
rsnUpdatePmkidCandidateList(prPrimaryBssDesc);
if (prAdapter->rWifiVar.rAisBssInfo.u4PmkidCandicateCount)
prAdapter->rWifiVar.rAisBssInfo.fgIndicatePMKID = rsnCheckPmkidCandicate();
}
#endif
prPrimaryBssDesc = (P_BSS_DESC_T) NULL;
/* 4 <6> Check current Connection Policy. */
switch (prConnSettings->eConnectionPolicy) {
case CONNECT_BY_SSID_BEST_RSSI:
/* Choose Hidden SSID to join only if the `fgIsEnableJoin...` is TRUE */
if (prAdapter->rWifiVar.fgEnableJoinToHiddenSSID && prBssDesc->fgIsHiddenSSID) {
/* NOTE(Kevin): following if () statement means that
* If Target is hidden, then we won't connect when user specify SSID_ANY policy.
*/
if (prConnSettings->ucSSIDLen) {
prPrimaryBssDesc = prBssDesc;
fgIsFindBestRSSI = TRUE;
}
} else if (EQUAL_SSID(prBssDesc->aucSSID,
prBssDesc->ucSSIDLen,
prConnSettings->aucSSID, prConnSettings->ucSSIDLen)) {
prPrimaryBssDesc = prBssDesc;
fgIsFindBestRSSI = TRUE;
DBGLOG(SCN, LOUD, "SEARCH: Found BSS by SSID, [" MACSTR "], SSID:%s\n",
MAC2STR(prBssDesc->aucBSSID), prBssDesc->aucSSID);
}
break;
case CONNECT_BY_SSID_ANY:
/* NOTE(Kevin): In this policy, we don't know the desired
* SSID from user, so we should exclude the Hidden SSID from scan list.
* And because we refuse to connect to Hidden SSID node at the beginning, so
* when the JOIN Module deal with a BSS_DESC_T which has fgIsHiddenSSID == TRUE,
* then the Connection Settings must be valid without doubt.
*/
if (!prBssDesc->fgIsHiddenSSID) {
prPrimaryBssDesc = prBssDesc;
fgIsFindFirst = TRUE;
}
break;
case CONNECT_BY_BSSID:
if (EQUAL_MAC_ADDR(prBssDesc->aucBSSID, prConnSettings->aucBSSID)) {
/* Make sure to match with SSID if supplied.
* Some dual band APs share a single BSSID among different BSSes.
*/
if ((prBssDesc->ucSSIDLen > 0 && prConnSettings->ucSSIDLen > 0 &&
EQUAL_SSID(prBssDesc->aucSSID, prBssDesc->ucSSIDLen,
prConnSettings->aucSSID, prConnSettings->ucSSIDLen)) ||
prConnSettings->ucSSIDLen == 0)
prPrimaryBssDesc = prBssDesc;
}
break;
default:
break;
}
/* Primary Candidate was not found */
if (prPrimaryBssDesc == NULL)
continue;
/* 4 <7> Check the Encryption Status. */
if (prPrimaryBssDesc->eBSSType == BSS_TYPE_INFRASTRUCTURE) {
#if CFG_SUPPORT_WAPI
if (prAdapter->rWifiVar.rConnSettings.fgWapiMode) {
if (wapiPerformPolicySelection(prAdapter, prPrimaryBssDesc)) {
fgIsFindFirst = TRUE;
} else {
/* Can't pass the Encryption Status Check, get next one */
DBGLOG(RSN, INFO, "Ignore BSS can't pass WAPI policy selection\n");
continue;
}
} else
#endif
if (rsnPerformPolicySelection(prAdapter, prPrimaryBssDesc)) {
if (prAisSpecBssInfo->fgCounterMeasure) {
DBGLOG(RSN, INFO, "Skip while at counter measure period!!!\n");
continue;
}
if (prPrimaryBssDesc->ucEncLevel > 0) {
fgIsFindBestEncryptionLevel = TRUE;
fgIsFindFirst = FALSE;
}
} else {
/* Can't pass the Encryption Status Check, get next one */
DBGLOG(RSN, INFO, "Ignore BSS can't pass Encryption Status Check\n");
continue;
}
} else {
/* Todo:: P2P and BOW Policy Selection */
}
prPrimaryStaRec = prStaRec;
/* 4 <8> Compare the Candidate and the Primary Scan Record. */
if (!prCandidateBssDesc) {
prCandidateBssDesc = prPrimaryBssDesc;
prCandidateStaRec = prPrimaryStaRec;
/* 4 <8.1> Condition - Get the first matched one. */
if (fgIsFindFirst)
break;
} else {
/* 4 <6D> Condition - Visible SSID win Hidden SSID. */
if (prCandidateBssDesc->fgIsHiddenSSID) {
if (!prPrimaryBssDesc->fgIsHiddenSSID) {
prCandidateBssDesc = prPrimaryBssDesc; /* The non Hidden SSID win. */
prCandidateStaRec = prPrimaryStaRec;
continue;
}
} else {
if (prPrimaryBssDesc->fgIsHiddenSSID)
continue;
}
/* 4 <6E> Condition - Choose the one with better RCPI(RSSI). */
if (fgIsFindBestRSSI) {
/* TODO(Kevin): We shouldn't compare the actual value, we should
* allow some acceptable tolerance of some RSSI percentage here.
*/
DBGLOG(SCN, TRACE,
"Candidate [" MACSTR "]: RCPI = %d, joinFailCnt=%d, Primary [" MACSTR
"]: RCPI = %d, joinFailCnt=%d\n", MAC2STR(prCandidateBssDesc->aucBSSID),
prCandidateBssDesc->ucRCPI, prCandidateBssDesc->ucJoinFailureCount,
MAC2STR(prPrimaryBssDesc->aucBSSID), prPrimaryBssDesc->ucRCPI,
prPrimaryBssDesc->ucJoinFailureCount);
ASSERT(!(prCandidateBssDesc->fgIsConnected && prPrimaryBssDesc->fgIsConnected));
if (prPrimaryBssDesc->ucJoinFailureCount > SCN_BSS_JOIN_FAIL_THRESOLD) {
/* give a chance to do join if join fail before
* SCN_BSS_DECRASE_JOIN_FAIL_CNT_SEC seconds
*/
if (CHECK_FOR_TIMEOUT(rCurrentTime, prBssDesc->rJoinFailTime,
SEC_TO_SYSTIME(SCN_BSS_JOIN_FAIL_CNT_RESET_SEC))) {
prBssDesc->ucJoinFailureCount -= SCN_BSS_JOIN_FAIL_RESET_STEP;
DBGLOG(AIS, INFO,
"decrease join fail count for Bss " MACSTR
" to %u, timeout second %d\n", MAC2STR(prBssDesc->aucBSSID),
prBssDesc->ucJoinFailureCount, SCN_BSS_JOIN_FAIL_CNT_RESET_SEC);
}
}
/* NOTE: To prevent SWING, we do roaming only if target AP
* has at least 5dBm larger than us.
*/
if (prCandidateBssDesc->fgIsConnected) {
if ((prCandidateBssDesc->ucRCPI + ROAMING_NO_SWING_RCPI_STEP <=
prPrimaryBssDesc->ucRCPI)
&& prPrimaryBssDesc->ucJoinFailureCount <= SCN_BSS_JOIN_FAIL_THRESOLD) {
prCandidateBssDesc = prPrimaryBssDesc;
prCandidateStaRec = prPrimaryStaRec;
continue;
}
} else if (prPrimaryBssDesc->fgIsConnected) {
if ((prCandidateBssDesc->ucRCPI <
prPrimaryBssDesc->ucRCPI + ROAMING_NO_SWING_RCPI_STEP)
|| (prCandidateBssDesc->ucJoinFailureCount > SCN_BSS_JOIN_FAIL_THRESOLD)) {
prCandidateBssDesc = prPrimaryBssDesc;
prCandidateStaRec = prPrimaryStaRec;
continue;
}
} else if (prPrimaryBssDesc->ucJoinFailureCount > SCN_BSS_JOIN_FAIL_THRESOLD)
continue;
else if (prCandidateBssDesc->ucJoinFailureCount > SCN_BSS_JOIN_FAIL_THRESOLD ||
prCandidateBssDesc->ucRCPI < prPrimaryBssDesc->ucRCPI) {
prCandidateBssDesc = prPrimaryBssDesc;
prCandidateStaRec = prPrimaryStaRec;
continue;
}
}
#if 0
/* If reach here, that means they have the same Encryption Score, and
* both RSSI value are close too.
*/
/* 4 <6F> Seek the minimum Channel Load for less interference. */
if (fgIsFindMinChannelLoad) {
/* ToDo:: Nothing */
/* TODO(Kevin): Check which one has minimum channel load in its channel */
}
#endif
}
}
return prCandidateBssDesc;
} /* end of scanSearchBssDescByPolicy() */
VOID scanReportBss2Cfg80211(IN P_ADAPTER_T prAdapter, IN ENUM_BSS_TYPE_T eBSSType, IN P_BSS_DESC_T SpecificprBssDesc)
{
P_SCAN_INFO_T prScanInfo = NULL;
P_LINK_T prBSSDescList = NULL;
P_BSS_DESC_T prBssDesc = NULL;
RF_CHANNEL_INFO_T rChannelInfo;
ASSERT(prAdapter);
prScanInfo = &(prAdapter->rWifiVar.rScanInfo);
prBSSDescList = &prScanInfo->rBSSDescList;
DBGLOG(SCN, TRACE, "scanReportBss2Cfg80211\n");
if (SpecificprBssDesc) {
{
/* check BSSID is legal channel */
if (!scanCheckBssIsLegal(prAdapter, SpecificprBssDesc)) {
DBGLOG(SCN, TRACE, "Remove specific SSID[%s %d]\n",
SpecificprBssDesc->aucSSID, SpecificprBssDesc->ucChannelNum);
return;
}
DBGLOG(SCN, TRACE, "Report Specific SSID[%s]\n", SpecificprBssDesc->aucSSID);
if (eBSSType == BSS_TYPE_INFRASTRUCTURE) {
kalIndicateBssInfo(prAdapter->prGlueInfo,
(PUINT_8) SpecificprBssDesc->aucRawBuf,
SpecificprBssDesc->u2RawLength,
SpecificprBssDesc->ucChannelNum,
RCPI_TO_dBm(SpecificprBssDesc->ucRCPI));
} else {
rChannelInfo.ucChannelNum = SpecificprBssDesc->ucChannelNum;
rChannelInfo.eBand = SpecificprBssDesc->eBand;
kalP2PIndicateBssInfo(prAdapter->prGlueInfo,
(PUINT_8) SpecificprBssDesc->aucRawBuf,
SpecificprBssDesc->u2RawLength,
&rChannelInfo, RCPI_TO_dBm(SpecificprBssDesc->ucRCPI));
}
#if CFG_ENABLE_WIFI_DIRECT
SpecificprBssDesc->fgIsP2PReport = FALSE;
#endif
}
} else {
#if CFG_AUTO_CHANNEL_SEL_SUPPORT
/* Clear old ACS data (APNum, Dirtiness, ...) and initialize the ch number */
kalMemZero(&(prAdapter->rWifiVar.rChnLoadInfo),
sizeof(prAdapter->rWifiVar.rChnLoadInfo));
wlanInitChnLoadInfoChannelList(prAdapter);
#endif
/* Search BSS Desc from current SCAN result list. */
LINK_FOR_EACH_ENTRY(prBssDesc, prBSSDescList, rLinkEntry, BSS_DESC_T) {
#if CFG_AUTO_CHANNEL_SEL_SUPPORT
/* Record channel loading with channel's AP number */
UINT_8 ucIdx = wlanGetChannelIndex(prBssDesc->ucChannelNum);
if (ucIdx < MAX_CHN_NUM)
prAdapter->rWifiVar.rChnLoadInfo.rEachChnLoad[ucIdx].u2APNum++;
#endif
/* check BSSID is legal channel */
if (!scanCheckBssIsLegal(prAdapter, prBssDesc)) {
DBGLOG(SCN, TRACE, "Remove SSID[%s %d]\n", prBssDesc->aucSSID, prBssDesc->ucChannelNum);
continue;
}
if ((prBssDesc->eBSSType == eBSSType)
#if CFG_ENABLE_WIFI_DIRECT
|| ((eBSSType == BSS_TYPE_P2P_DEVICE) &&
(prBssDesc->fgIsP2PReport == TRUE &&
prAdapter->p2p_scan_report_all_bss))
#endif
) {
DBGLOG(SCN, TRACE, "Report ALL SSID[%s %d]\n",
prBssDesc->aucSSID, prBssDesc->ucChannelNum);
if (eBSSType == BSS_TYPE_INFRASTRUCTURE) {
if (prBssDesc->u2RawLength != 0) {
kalIndicateBssInfo(prAdapter->prGlueInfo,
(PUINT_8) prBssDesc->aucRawBuf,
prBssDesc->u2RawLength,
prBssDesc->ucChannelNum,
RCPI_TO_dBm(prBssDesc->ucRCPI));
kalMemZero(prBssDesc->aucRawBuf, CFG_RAW_BUFFER_SIZE);
prBssDesc->u2RawLength = 0;
#if CFG_ENABLE_WIFI_DIRECT
prBssDesc->fgIsP2PReport = FALSE;
#endif
}
} else {
#if CFG_ENABLE_WIFI_DIRECT
if ((prBssDesc->fgIsP2PReport == TRUE &&
prAdapter->p2p_scan_report_all_bss) &&
prBssDesc->u2RawLength != 0) {
#endif
rChannelInfo.ucChannelNum = prBssDesc->ucChannelNum;
rChannelInfo.eBand = prBssDesc->eBand;
kalP2PIndicateBssInfo(prAdapter->prGlueInfo,
(PUINT_8) prBssDesc->aucRawBuf,
prBssDesc->u2RawLength,
&rChannelInfo, RCPI_TO_dBm(prBssDesc->ucRCPI));
/* do not clear it then we can pass the bss in Specific report */
/* kalMemZero(prBssDesc->aucRawBuf,CFG_RAW_BUFFER_SIZE); */
/*
* the BSS entry will not be cleared after scan done.
* So if we dont receive the BSS in next scan, we cannot
* pass it. We use u2RawLength for the purpose.
*/
/* prBssDesc->u2RawLength=0; */
#if CFG_ENABLE_WIFI_DIRECT
prBssDesc->fgIsP2PReport = FALSE;
}
#endif
}
}
}
#if CFG_AUTO_CHANNEL_SEL_SUPPORT
wlanCalculateAllChannelDirtiness(prAdapter);
wlanSortChannel(prAdapter);
prAdapter->rWifiVar.rChnLoadInfo.fgDataReadyBit = TRUE;
#endif
}
}
#if CFG_SUPPORT_PASSPOINT
/*----------------------------------------------------------------------------*/
/*!
* @brief Find the corresponding BSS Descriptor according to given BSSID
*
* @param[in] prAdapter Pointer to the Adapter structure.
* @param[in] aucBSSID Given BSSID.
* @param[in] fgCheckSsid Need to check SSID or not. (for multiple SSID with single BSSID cases)
* @param[in] prSsid Specified SSID
*
* @return Pointer to BSS Descriptor, if found. NULL, if not found
*/
/*----------------------------------------------------------------------------*/
P_BSS_DESC_T scanSearchBssDescByBssidAndLatestUpdateTime(IN P_ADAPTER_T prAdapter, IN UINT_8 aucBSSID[])
{
P_SCAN_INFO_T prScanInfo;
P_LINK_T prBSSDescList;
P_BSS_DESC_T prBssDesc;
P_BSS_DESC_T prDstBssDesc = (P_BSS_DESC_T) NULL;
OS_SYSTIME rLatestUpdateTime = 0;
ASSERT(prAdapter);
ASSERT(aucBSSID);
prScanInfo = &(prAdapter->rWifiVar.rScanInfo);
prBSSDescList = &prScanInfo->rBSSDescList;
/* Search BSS Desc from current SCAN result list. */
LINK_FOR_EACH_ENTRY(prBssDesc, prBSSDescList, rLinkEntry, BSS_DESC_T) {
if (EQUAL_MAC_ADDR(prBssDesc->aucBSSID, aucBSSID)) {
if (!rLatestUpdateTime || CHECK_FOR_EXPIRATION(prBssDesc->rUpdateTime, rLatestUpdateTime)) {
prDstBssDesc = prBssDesc;
COPY_SYSTIME(rLatestUpdateTime, prBssDesc->rUpdateTime);
}
}
}
return prDstBssDesc;
} /* end of scanSearchBssDescByBssid() */
#endif /* CFG_SUPPORT_PASSPOINT */
#if CFG_SUPPORT_AGPS_ASSIST
VOID scanReportScanResultToAgps(P_ADAPTER_T prAdapter)
{
P_LINK_T prBSSDescList = &prAdapter->rWifiVar.rScanInfo.rBSSDescList;
P_BSS_DESC_T prBssDesc = NULL;
P_AGPS_AP_LIST_T prAgpsApList = kalMemAlloc(sizeof(AGPS_AP_LIST_T), VIR_MEM_TYPE);
P_AGPS_AP_INFO_T prAgpsInfo = &prAgpsApList->arApInfo[0];
P_SCAN_INFO_T prScanInfo = &prAdapter->rWifiVar.rScanInfo;
UINT_8 ucIndex = 0;
LINK_FOR_EACH_ENTRY(prBssDesc, prBSSDescList, rLinkEntry, BSS_DESC_T) {
if (prBssDesc->rUpdateTime < prScanInfo->rLastScanCompletedTime)
continue;
COPY_MAC_ADDR(prAgpsInfo->aucBSSID, prBssDesc->aucBSSID);
prAgpsInfo->ePhyType = AGPS_PHY_G;
prAgpsInfo->u2Channel = prBssDesc->ucChannelNum;
prAgpsInfo->i2ApRssi = RCPI_TO_dBm(prBssDesc->ucRCPI);
prAgpsInfo++;
ucIndex++;
if (ucIndex == SCN_AGPS_AP_LIST_MAX_NUM)
break;
}
prAgpsApList->ucNum = ucIndex;
GET_CURRENT_SYSTIME(&prScanInfo->rLastScanCompletedTime);
/* DBGLOG(SCN, INFO, ("num of scan list:%d\n", ucIndex)); */
kalIndicateAgpsNotify(prAdapter, AGPS_EVENT_WLAN_AP_LIST, (PUINT_8) prAgpsApList, sizeof(AGPS_AP_LIST_T));
kalMemFree(prAgpsApList, VIR_MEM_TYPE, sizeof(AGPS_AP_LIST_T));
}
#endif /* CFG_SUPPORT_AGPS_ASSIST */