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gerrit-public.fairphone.software / platform / vendor / qcom-opensource / wlan / prima / 62b55b061effbb9bbfffc8b74c1e84752e4ca31f / . / CORE / SME / src / csr / csrNeighborRoam.c
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/*
* Copyright (c) 2012, The Linux Foundation. All rights reserved.
*
* Previously licensed under the ISC license by Qualcomm Atheros, Inc.
*
*
* Permission to use, copy, modify, and/or distribute this software for
* any purpose with or without fee is hereby granted, provided that the
* above copyright notice and this permission notice appear in all
* copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
* WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
* AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
/*
* */
/** ------------------------------------------------------------------------- *
------------------------------------------------------------------------- *
\file csrNeighborRoam.c
Implementation for the simple roaming algorithm for 802.11r Fast transitions and Legacy roaming for Android platform.
Copyright (C) 2010 Qualcomm, Incorporated
========================================================================== */
/*===========================================================================
EDIT HISTORY FOR FILE
This section contains comments describing changes made to the module.
Notice that changes are listed in reverse chronological order.
when who what, where, why
---------- --- --------------------------------------------------------
08/01/10 Murali Created
===========================================================================*/
#ifdef WLAN_FEATURE_NEIGHBOR_ROAMING
#include "wlan_qct_wda.h"
#include "palApi.h"
#include "csrInsideApi.h"
#include "smsDebug.h"
#include "logDump.h"
#include "smeQosInternal.h"
#include "wlan_qct_tl.h"
#include "smeInside.h"
#include "vos_diag_core_event.h"
#include "vos_diag_core_log.h"
#include "csrApi.h"
#include "wlan_qct_tl.h"
#include "sme_Api.h"
#include "csrNeighborRoam.h"
#ifdef FEATURE_WLAN_CCX
#include "csrCcx.h"
#endif
#define WLAN_FEATURE_NEIGHBOR_ROAMING_DEBUG 1
#ifdef WLAN_FEATURE_NEIGHBOR_ROAMING_DEBUG
#define NEIGHBOR_ROAM_DEBUG smsLog
#else
#define NEIGHBOR_ROAM_DEBUG(x...)
#endif
static void csrNeighborRoamResetChannelInfo(tpCsrNeighborRoamChannelInfo rChInfo);
static void csrNeighborRoamResetCfgListChanScanControlInfo(tpAniSirGlobal pMac);
static void csrNeighborRoamResetPreauthControlInfo(tpAniSirGlobal pMac);
static void csrNeighborRoamDeregAllRssiIndication(tpAniSirGlobal pMac);
VOS_STATUS csrNeighborRoamNeighborLookupUPCallback (v_PVOID_t pAdapter, v_U8_t rssiNotification,
v_PVOID_t pUserCtxt);
VOS_STATUS csrNeighborRoamNeighborLookupDOWNCallback (v_PVOID_t pAdapter, v_U8_t rssiNotification,
v_PVOID_t pUserCtxt);
void csrNeighborRoamRRMNeighborReportResult(void *context, VOS_STATUS vosStatus);
eHalStatus csrRoamCopyConnectedProfile(tpAniSirGlobal pMac, tANI_U32 sessionId, tCsrRoamProfile *pDstProfile );
#ifdef WLAN_FEATURE_VOWIFI_11R
static eHalStatus csrNeighborRoamIssuePreauthReq(tpAniSirGlobal pMac);
VOS_STATUS csrNeighborRoamIssueNeighborRptRequest(tpAniSirGlobal pMac);
#endif
/* State Transition macro */
#define CSR_NEIGHBOR_ROAM_STATE_TRANSITION(newState)\
{\
pMac->roam.neighborRoamInfo.prevNeighborRoamState = pMac->roam.neighborRoamInfo.neighborRoamState;\
pMac->roam.neighborRoamInfo.neighborRoamState = newState;\
smsLog(pMac, LOG1, FL("Neighbor Roam Transition from state %d ==> %d"), pMac->roam.neighborRoamInfo.prevNeighborRoamState, newState);\
}
/* ---------------------------------------------------------------------------
\fn csrNeighborRoamFreeNeighborRoamBSSNode
\brief This function frees all the internal pointers CSR NeighborRoam BSS Info
and also frees the node itself
\param pMac - The handle returned by macOpen.
neighborRoamBSSNode - Neighbor Roam BSS Node to be freed
\return VOID
---------------------------------------------------------------------------*/
void csrNeighborRoamFreeNeighborRoamBSSNode(tpAniSirGlobal pMac, tpCsrNeighborRoamBSSInfo neighborRoamBSSNode)
{
if (neighborRoamBSSNode)
{
if (neighborRoamBSSNode->pBssDescription)
{
vos_mem_free(neighborRoamBSSNode->pBssDescription);
neighborRoamBSSNode->pBssDescription = NULL;
}
vos_mem_free(neighborRoamBSSNode);
neighborRoamBSSNode = NULL;
}
return;
}
/* ---------------------------------------------------------------------------
\fn csrNeighborRoamRemoveRoamableAPListEntry
\brief This function removes a given entry from the given list
\param pMac - The handle returned by macOpen.
pList - The list from which the entry should be removed
pNeighborEntry - Neighbor Roam BSS Node to be removed
\return TRUE if successfully removed, else FALSE
---------------------------------------------------------------------------*/
tANI_BOOLEAN csrNeighborRoamRemoveRoamableAPListEntry(tpAniSirGlobal pMac,
tDblLinkList *pList, tpCsrNeighborRoamBSSInfo pNeighborEntry)
{
if(pList)
{
return csrLLRemoveEntry(pList, &pNeighborEntry->List, LL_ACCESS_LOCK);
}
smsLog(pMac, LOGE, FL("Removing neighbor BSS node from list failed. Current count = %d\n"), csrLLCount(pList));
return eANI_BOOLEAN_FALSE;
}
/* ---------------------------------------------------------------------------
\fn csrNeighborRoamGetRoamableAPListNextEntry
\brief Gets the entry next to passed entry. If NULL is passed, return the entry in the head of the list
\param pMac - The handle returned by macOpen.
pList - The list from which the entry should be returned
pNeighborEntry - Neighbor Roam BSS Node whose next entry should be returned
\return Neighbor Roam BSS Node to be returned
---------------------------------------------------------------------------*/
tpCsrNeighborRoamBSSInfo csrNeighborRoamGetRoamableAPListNextEntry(tpAniSirGlobal pMac,
tDblLinkList *pList, tpCsrNeighborRoamBSSInfo pNeighborEntry)
{
tListElem *pEntry = NULL;
tpCsrNeighborRoamBSSInfo pResult = NULL;
if(pList)
{
if(NULL == pNeighborEntry)
{
pEntry = csrLLPeekHead(pList, LL_ACCESS_LOCK);
}
else
{
pEntry = csrLLNext(pList, &pNeighborEntry->List, LL_ACCESS_LOCK);
}
if(pEntry)
{
pResult = GET_BASE_ADDR(pEntry, tCsrNeighborRoamBSSInfo, List);
}
}
return pResult;
}
/* ---------------------------------------------------------------------------
\fn csrNeighborRoamFreeRoamableBSSList
\brief Empties and frees all the nodes in the roamable AP list
\param pMac - The handle returned by macOpen.
pList - Neighbor Roam BSS List to be emptied
\return VOID
---------------------------------------------------------------------------*/
void csrNeighborRoamFreeRoamableBSSList(tpAniSirGlobal pMac, tDblLinkList *pList)
{
tpCsrNeighborRoamBSSInfo pResult = NULL;
NEIGHBOR_ROAM_DEBUG(pMac, LOG2, FL("Emptying the BSS list. Current count = %d\n"), csrLLCount(pList));
/* Pick up the head, remove and free the node till the list becomes empty */
while ((pResult = csrNeighborRoamGetRoamableAPListNextEntry(pMac, pList, NULL)) != NULL)
{
csrNeighborRoamRemoveRoamableAPListEntry(pMac, pList, pResult);
csrNeighborRoamFreeNeighborRoamBSSNode(pMac, pResult);
}
return;
}
static void csrNeighborRoamTriggerHandoff(tpAniSirGlobal pMac,
tpCsrNeighborRoamControlInfo pNeighborRoamInfo)
{
#ifdef WLAN_FEATURE_VOWIFI_11R
if (pNeighborRoamInfo->is11rAssoc)
{
if (eCSR_NEIGHBOR_ROAM_STATE_REPORT_SCAN == pNeighborRoamInfo->neighborRoamState)
{
csrNeighborRoamIssuePreauthReq(pMac);
}
else
{
smsLog(pMac, LOGE, FL("11R Reassoc indication received in unexpected state %d"), pNeighborRoamInfo->neighborRoamState);
VOS_ASSERT(0);
}
}
else
#endif
#ifdef FEATURE_WLAN_CCX
if (pNeighborRoamInfo->isCCXAssoc)
{
if (eCSR_NEIGHBOR_ROAM_STATE_REPORT_SCAN == pNeighborRoamInfo->neighborRoamState)
{
csrNeighborRoamIssuePreauthReq(pMac);
}
else
{
smsLog(pMac, LOGE, FL("CCX Reassoc indication received in unexpected state %d"), pNeighborRoamInfo->neighborRoamState);
VOS_ASSERT(0);
}
}
else
#endif
#ifdef FEATURE_WLAN_LFR
if (csrRoamIsFastRoamEnabled(pMac, CSR_SESSION_ID_INVALID))
{
if (eCSR_NEIGHBOR_ROAM_STATE_REPORT_SCAN == pNeighborRoamInfo->neighborRoamState)
{
csrNeighborRoamIssuePreauthReq(pMac);
}
else
{
smsLog(pMac, LOGE, FL("LFR Reassoc indication received in unexpected state %d"), pNeighborRoamInfo->neighborRoamState);
VOS_ASSERT(0);
}
}
else
#endif
{
if (eCSR_NEIGHBOR_ROAM_STATE_CFG_CHAN_LIST_SCAN == pNeighborRoamInfo->neighborRoamState)
{
csrNeighborRoamRequestHandoff(pMac);
}
else
{
smsLog(pMac, LOGE, FL("Non-11R Reassoc indication received in unexpected state %d"), pNeighborRoamInfo->neighborRoamState);
VOS_ASSERT(0);
}
}
}
/* ---------------------------------------------------------------------------
\fn csrNeighborRoamReassocIndCallback
\brief Reassoc callback invoked by TL on crossing the registered re-assoc threshold.
Directly triggere HO in case of non-11r association
In case of 11R association, triggers a pre-auth eventually followed by actual HO
\param pAdapter - VOS Context
trafficStatus - UP/DOWN indication from TL
pUserCtxt - Parameter for callback registered during callback registration. Should be pMac
\return VOID
---------------------------------------------------------------------------*/
VOS_STATUS csrNeighborRoamReassocIndCallback(v_PVOID_t pAdapter,
v_U8_t trafficStatus,
v_PVOID_t pUserCtxt)
{
tpAniSirGlobal pMac = PMAC_STRUCT( pUserCtxt );
tpCsrNeighborRoamControlInfo pNeighborRoamInfo = &pMac->roam.neighborRoamInfo;
VOS_STATUS vosStatus = VOS_STATUS_SUCCESS;
NEIGHBOR_ROAM_DEBUG(pMac, LOG2, FL("Deregistering DOWN event reassoc callback with TL. RSSI = %d"), pNeighborRoamInfo->cfgParams.neighborReassocThreshold * (-1));
vosStatus = WLANTL_DeregRSSIIndicationCB(pMac->roam.gVosContext, (v_S7_t)pNeighborRoamInfo->cfgParams.neighborReassocThreshold * (-1),
WLANTL_HO_THRESHOLD_DOWN,
csrNeighborRoamReassocIndCallback,
VOS_MODULE_ID_SME);
if(!VOS_IS_STATUS_SUCCESS(vosStatus))
{
//err msg
smsLog(pMac, LOGW, FL(" Couldn't deregister csrNeighborRoamReassocIndCallback with TL: Status = %d\n"), vosStatus);
}
NEIGHBOR_ROAM_DEBUG(pMac, LOG2, FL("Rcvd reassoc notification-deregister UP indication. RSSI = %d"),
NEIGHBOR_ROAM_LOOKUP_UP_THRESHOLD * (-1));
vosStatus = WLANTL_DeregRSSIIndicationCB(pMac->roam.gVosContext,
(v_S7_t)NEIGHBOR_ROAM_LOOKUP_UP_THRESHOLD * (-1),
WLANTL_HO_THRESHOLD_UP,
csrNeighborRoamNeighborLookupUPCallback,
VOS_MODULE_ID_SME);
if(!VOS_IS_STATUS_SUCCESS(vosStatus))
{
//err msg
smsLog(pMac, LOGW, FL(" Couldn't deregister csrNeighborRoamNeighborLookupUPCallback with TL: Status = %d\n"), vosStatus);
}
/* We dont need to run this timer any more. */
palTimerStop(pMac->hHdd, pNeighborRoamInfo->neighborResultsRefreshTimer);
csrNeighborRoamTriggerHandoff(pMac, pNeighborRoamInfo);
return VOS_STATUS_SUCCESS;
}
/*CleanUP Routines*/
static void csrNeighborRoamResetChannelInfo(tpCsrNeighborRoamChannelInfo rChInfo)
{
if ((rChInfo->IAPPNeighborListReceived == FALSE) &&
(rChInfo->currentChannelListInfo.numOfChannels))
{
rChInfo->currentChanIndex = CSR_NEIGHBOR_ROAM_INVALID_CHANNEL_INDEX;
rChInfo->currentChannelListInfo.numOfChannels = 0;
if (rChInfo->currentChannelListInfo.ChannelList)
vos_mem_free(rChInfo->currentChannelListInfo.ChannelList);
rChInfo->currentChannelListInfo.ChannelList = NULL;
rChInfo->chanListScanInProgress = eANI_BOOLEAN_FALSE;
}
else
{
rChInfo->currentChanIndex = 0;
rChInfo->chanListScanInProgress = eANI_BOOLEAN_TRUE;
}
}
static void csrNeighborRoamResetCfgListChanScanControlInfo(tpAniSirGlobal pMac)
{
tpCsrNeighborRoamControlInfo pNeighborRoamInfo = &pMac->roam.neighborRoamInfo;
/* Stop neighbor scan timer */
palTimerStop(pMac->hHdd, pNeighborRoamInfo->neighborScanTimer);
/* Stop neighbor scan results refresh timer */
palTimerStop(pMac->hHdd, pNeighborRoamInfo->neighborResultsRefreshTimer);
/* Abort any ongoing scan */
if (eANI_BOOLEAN_TRUE == pNeighborRoamInfo->scanRspPending)
{
csrScanAbortMacScan(pMac);
}
pNeighborRoamInfo->scanRspPending = eANI_BOOLEAN_FALSE;
/* Reset roam channel list information */
csrNeighborRoamResetChannelInfo(&pNeighborRoamInfo->roamChannelInfo);
}
static void csrNeighborRoamResetPreauthControlInfo(tpAniSirGlobal pMac)
{
tpCsrNeighborRoamControlInfo pNeighborRoamInfo = &pMac->roam.neighborRoamInfo;
#if defined (WLAN_FEATURE_VOWIFI_11R) || defined (FEATURE_WLAN_CCX) || defined(FEATURE_WLAN_LFR)
pNeighborRoamInfo->is11rAssoc = eANI_BOOLEAN_FALSE;
pNeighborRoamInfo->FTRoamInfo.preAuthRspWaitTimerInfo.pMac = pMac;
pNeighborRoamInfo->FTRoamInfo.preAuthRspWaitTimerInfo.sessionId =
CSR_SESSION_ID_INVALID;
/* Purge pre-auth fail list */
csrNeighborRoamPurgePreauthFailedList(pMac);
#endif
pNeighborRoamInfo->FTRoamInfo.preauthRspPending = eANI_BOOLEAN_FALSE;
pNeighborRoamInfo->FTRoamInfo.numPreAuthRetries = 0;
#ifdef WLAN_FEATURE_VOWIFI_11R
/* Do not free up the preauth done list here */
pNeighborRoamInfo->FTRoamInfo.currentNeighborRptRetryNum = 0;
pNeighborRoamInfo->FTRoamInfo.neighborRptPending = eANI_BOOLEAN_FALSE;
pNeighborRoamInfo->FTRoamInfo.numBssFromNeighborReport = 0;
vos_mem_zero(pNeighborRoamInfo->FTRoamInfo.neighboReportBssInfo, sizeof(tCsrNeighborReportBssInfo) * MAX_BSS_IN_NEIGHBOR_RPT);
palTimerStop(pMac->hHdd, pNeighborRoamInfo->FTRoamInfo.preAuthRspWaitTimer);
#endif
}
static void csrNeighborRoamDeregAllRssiIndication(tpAniSirGlobal pMac)
{
tpCsrNeighborRoamControlInfo pNeighborRoamInfo = &pMac->roam.neighborRoamInfo;
VOS_STATUS vosStatus = VOS_STATUS_SUCCESS;
NEIGHBOR_ROAM_DEBUG(pMac, LOG2,
FL("Deregister neighbor lookup UP callback with TL. RSSI = %d"),
NEIGHBOR_ROAM_LOOKUP_UP_THRESHOLD * (-1));
/* Deregister reassoc callback. Ignore return status */
vosStatus = WLANTL_DeregRSSIIndicationCB(pMac->roam.gVosContext,
(v_S7_t)NEIGHBOR_ROAM_LOOKUP_UP_THRESHOLD * (-1),
WLANTL_HO_THRESHOLD_UP,
csrNeighborRoamNeighborLookupUPCallback,
VOS_MODULE_ID_SME);
if(!VOS_IS_STATUS_SUCCESS(vosStatus))
{
smsLog(pMac, LOGW,
FL("Couldn't deregister csrNeighborRoamNeighborLookupUPCallback "
"with TL: Status = %d\n"), vosStatus);
}
NEIGHBOR_ROAM_DEBUG(pMac, LOG2,
FL("Deregistering reassoc DOWN callback with TL. RSSI = %d"),
pNeighborRoamInfo->cfgParams.neighborReassocThreshold * (-1));
/* Deregister reassoc callback. Ignore return status */
vosStatus = WLANTL_DeregRSSIIndicationCB(pMac->roam.gVosContext,
(v_S7_t)pNeighborRoamInfo->cfgParams.neighborReassocThreshold * (-1),
WLANTL_HO_THRESHOLD_DOWN,
csrNeighborRoamReassocIndCallback,
VOS_MODULE_ID_SME);
if(!VOS_IS_STATUS_SUCCESS(vosStatus))
{
smsLog(pMac, LOGW,
FL(" Couldn't deregister csrNeighborRoamReassocIndCallback with "
"TL: Status = %d\n"), vosStatus);
}
NEIGHBOR_ROAM_DEBUG(pMac, LOG2,
FL("Deregistering neighborLookup DOWN callback with TL. RSSI = %d"),
pNeighborRoamInfo->currentNeighborLookupThreshold * (-1));
/* Deregister neighbor lookup callback. Ignore return status */
vosStatus = WLANTL_DeregRSSIIndicationCB(pMac->roam.gVosContext,
(v_S7_t)pNeighborRoamInfo->currentNeighborLookupThreshold * (-1),
WLANTL_HO_THRESHOLD_DOWN,
csrNeighborRoamNeighborLookupDOWNCallback,
VOS_MODULE_ID_SME);
if(!VOS_IS_STATUS_SUCCESS(vosStatus))
{
smsLog(pMac, LOGW,
FL(" Couldn't deregister csrNeighborRoamNeighborLookupDOWNCallback "
"with TL: Status = %d\n"), vosStatus);
}
/* Reset thresholds only after deregistering DOWN event from TL */
pNeighborRoamInfo->currentNeighborLookupThreshold =
pNeighborRoamInfo->cfgParams.neighborLookupThreshold;
#ifdef FEATURE_WLAN_LFR
pNeighborRoamInfo->uEmptyScanCount = 0;
#endif
}
/* ---------------------------------------------------------------------------
\fn csrNeighborRoamResetConnectedStateControlInfo
\brief This function will reset the neighbor roam control info data structures.
This function should be invoked whenever we move to CONNECTED state from
any state other than INIT state
\param pMac - The handle returned by macOpen.
\return VOID
---------------------------------------------------------------------------*/
void csrNeighborRoamResetConnectedStateControlInfo(tpAniSirGlobal pMac)
{
tpCsrNeighborRoamControlInfo pNeighborRoamInfo = &pMac->roam.neighborRoamInfo;
csrNeighborRoamResetChannelInfo(&pNeighborRoamInfo->roamChannelInfo);
csrNeighborRoamFreeRoamableBSSList(pMac, &pNeighborRoamInfo->roamableAPList);
/* We dont need to run this timer any more. */
palTimerStop(pMac->hHdd, pNeighborRoamInfo->neighborResultsRefreshTimer);
#ifdef WLAN_FEATURE_VOWIFI_11R
/* Do not free up the preauth done list here */
pNeighborRoamInfo->FTRoamInfo.currentNeighborRptRetryNum = 0;
pNeighborRoamInfo->FTRoamInfo.neighborRptPending = eANI_BOOLEAN_FALSE;
pNeighborRoamInfo->FTRoamInfo.numPreAuthRetries = 0;
pNeighborRoamInfo->FTRoamInfo.numBssFromNeighborReport = 0;
pNeighborRoamInfo->FTRoamInfo.preauthRspPending = 0;
vos_mem_zero(pNeighborRoamInfo->FTRoamInfo.neighboReportBssInfo, sizeof(tCsrNeighborReportBssInfo) * MAX_BSS_IN_NEIGHBOR_RPT);
palTimerStop(pMac->hHdd, pNeighborRoamInfo->FTRoamInfo.preAuthRspWaitTimer);
#endif
}
void csrNeighborRoamResetReportScanStateControlInfo(tpAniSirGlobal pMac)
{
tpCsrNeighborRoamControlInfo pNeighborRoamInfo = &pMac->roam.neighborRoamInfo;
pNeighborRoamInfo->csrSessionId = CSR_SESSION_ID_INVALID;
vos_mem_set(pNeighborRoamInfo->currAPbssid, sizeof(tCsrBssid), 0);
pNeighborRoamInfo->neighborScanTimerInfo.pMac = pMac;
pNeighborRoamInfo->neighborScanTimerInfo.sessionId = CSR_SESSION_ID_INVALID;
#ifdef FEATURE_WLAN_CCX
pNeighborRoamInfo->isCCXAssoc = eANI_BOOLEAN_FALSE;
pNeighborRoamInfo->isVOAdmitted = eANI_BOOLEAN_FALSE;
pNeighborRoamInfo->MinQBssLoadRequired = 0;
#endif
/* Stop scan refresh timer */
palTimerStop(pMac->hHdd, pNeighborRoamInfo->neighborResultsRefreshTimer);
/* Purge roamable AP list */
csrNeighborRoamFreeRoamableBSSList(pMac, &pNeighborRoamInfo->roamableAPList);
return;
}
/* ---------------------------------------------------------------------------
\fn csrNeighborRoamResetInitStateControlInfo
\brief This function will reset the neighbor roam control info data structures.
This function should be invoked whenever we move to CONNECTED state from
INIT state
\param pMac - The handle returned by macOpen.
\return VOID
---------------------------------------------------------------------------*/
void csrNeighborRoamResetInitStateControlInfo(tpAniSirGlobal pMac)
{
csrNeighborRoamResetConnectedStateControlInfo(pMac);
/* In addition to the above resets, we should clear off the curAPBssId/Session ID in the timers */
csrNeighborRoamResetReportScanStateControlInfo(pMac);
}
#ifdef WLAN_FEATURE_VOWIFI_11R
/* ---------------------------------------------------------------------------
\fn csrNeighborRoamBssIdScanFilter
\brief This API is used to prepare a filter to obtain scan results when
we complete the scan in the REPORT_SCAN state after receiving a
valid neighbor report from AP. This filter includes BSSIDs received from
the neighbor report from the AP in addition to the other filter parameters
created from connected profile
\param pMac - The handle returned by macOpen.
pScanFilter - Scan filter to be filled and returned
\return eHAL_STATUS_SUCCESS on succesful filter creation, corresponding error
code otherwise
---------------------------------------------------------------------------*/
static eHalStatus csrNeighborRoamBssIdScanFilter(tpAniSirGlobal pMac, tCsrScanResultFilter *pScanFilter)
{
tpCsrNeighborRoamControlInfo pNeighborRoamInfo = &pMac->roam.neighborRoamInfo;
tANI_U8 i = 0;
VOS_ASSERT(pScanFilter != NULL);
vos_mem_zero(pScanFilter, sizeof(tCsrScanResultFilter));
pScanFilter->BSSIDs.numOfBSSIDs = pNeighborRoamInfo->FTRoamInfo.numBssFromNeighborReport;
pScanFilter->BSSIDs.bssid = vos_mem_malloc(sizeof(tSirMacAddr) * pScanFilter->BSSIDs.numOfBSSIDs);
if (NULL == pScanFilter->BSSIDs.bssid)
{
smsLog(pMac, LOGE, FL("Scan Filter BSSID mem alloc failed"));
return eHAL_STATUS_FAILED_ALLOC;
}
vos_mem_zero(pScanFilter->BSSIDs.bssid, sizeof(tSirMacAddr) * pScanFilter->BSSIDs.numOfBSSIDs);
/* Populate the BSSID from Neighbor BSS info received from neighbor report */
for (i = 0; i < pScanFilter->BSSIDs.numOfBSSIDs; i++)
{
vos_mem_copy(&pScanFilter->BSSIDs.bssid[i],
pNeighborRoamInfo->FTRoamInfo.neighboReportBssInfo[i].neighborBssId, sizeof(tSirMacAddr));
}
/* Fill other general scan filter params */
return csrNeighborRoamPrepareScanProfileFilter(pMac, pScanFilter);
}
/* ---------------------------------------------------------------------------
\fn csrNeighborRoamPurgePreauthFailList
\brief This function empties the preauth fail list
\param pMac - The handle returned by macOpen.
\return VOID
---------------------------------------------------------------------------*/
void csrNeighborRoamPurgePreauthFailList(tpAniSirGlobal pMac)
{
tpCsrNeighborRoamControlInfo pNeighborRoamInfo = &pMac->roam.neighborRoamInfo;
NEIGHBOR_ROAM_DEBUG(pMac, LOGE, FL("Purging the preauth fail list"));
while (pNeighborRoamInfo->FTRoamInfo.preAuthFailList.numMACAddress)
{
vos_mem_zero(pNeighborRoamInfo->FTRoamInfo.preAuthFailList.macAddress[pNeighborRoamInfo->FTRoamInfo.preAuthFailList.numMACAddress-1],
sizeof(tSirMacAddr));
pNeighborRoamInfo->FTRoamInfo.preAuthFailList.numMACAddress--;
}
return;
}
/* ---------------------------------------------------------------------------
\fn csrNeighborRoamAddBssIdToPreauthFailList
\brief This function adds the given BSSID to the Preauth fail list
\param pMac - The handle returned by macOpen.
bssId - BSSID to be added to the preauth fail list
\return eHAL_STATUS_SUCCESS on success, eHAL_STATUS_FAILURE otherwise
---------------------------------------------------------------------------*/
eHalStatus csrNeighborRoamAddBssIdToPreauthFailList(tpAniSirGlobal pMac, tSirMacAddr bssId)
{
tpCsrNeighborRoamControlInfo pNeighborRoamInfo = &pMac->roam.neighborRoamInfo;
NEIGHBOR_ROAM_DEBUG(pMac, LOGE, FL(" Added BSSID %02x:%02x:%02x:%02x:%02x:%02x to Preauth failed list\n"),
bssId[0], bssId[1], bssId[2], bssId[3], bssId[4], bssId[5]);
if ((pNeighborRoamInfo->FTRoamInfo.preAuthFailList.numMACAddress + 1) >
MAX_NUM_PREAUTH_FAIL_LIST_ADDRESS)
{
smsLog(pMac, LOGE, FL("Preauth fail list already full.. Cannot add new one"));
return eHAL_STATUS_FAILURE;
}
vos_mem_copy(pNeighborRoamInfo->FTRoamInfo.preAuthFailList.macAddress[pNeighborRoamInfo->FTRoamInfo.preAuthFailList.numMACAddress],
bssId, sizeof(tSirMacAddr));
pNeighborRoamInfo->FTRoamInfo.preAuthFailList.numMACAddress++;
return eHAL_STATUS_SUCCESS;
}
/* ---------------------------------------------------------------------------
\fn csrNeighborRoamIsPreauthCandidate
\brief This function checks whether the given MAC address is already
present in the preauth fail list and returns TRUE/FALSE accordingly
\param pMac - The handle returned by macOpen.
\return eANI_BOOLEAN_TRUE if preauth candidate, eANI_BOOLEAN_FALSE otherwise
---------------------------------------------------------------------------*/
tANI_BOOLEAN csrNeighborRoamIsPreauthCandidate(tpAniSirGlobal pMac, tSirMacAddr bssId)
{
tANI_U8 i = 0;
tpCsrNeighborRoamControlInfo pNeighborRoamInfo = &pMac->roam.neighborRoamInfo;
if (0 == pNeighborRoamInfo->FTRoamInfo.preAuthFailList.numMACAddress)
return eANI_BOOLEAN_TRUE;
for (i = 0; i < pNeighborRoamInfo->FTRoamInfo.preAuthFailList.numMACAddress; i++)
{
if (VOS_TRUE == vos_mem_compare(pNeighborRoamInfo->FTRoamInfo.preAuthFailList.macAddress[i],
bssId, sizeof(tSirMacAddr)))
{
NEIGHBOR_ROAM_DEBUG(pMac, LOGE, FL("BSSID %02x:%02x:%02x:%02x:%02x:%02x already present in preauth fail list"),
bssId[0], bssId[1], bssId[2], bssId[3], bssId[4], bssId[5]);
return eANI_BOOLEAN_FALSE;
}
}
return eANI_BOOLEAN_TRUE;
}
/* ---------------------------------------------------------------------------
\fn csrNeighborRoamIssuePreauthReq
\brief This function issues preauth request to PE with the 1st AP entry in the
roamable AP list
\param pMac - The handle returned by macOpen.
\return eHAL_STATUS_SUCCESS on success, eHAL_STATUS_FAILURE otherwise
---------------------------------------------------------------------------*/
static eHalStatus csrNeighborRoamIssuePreauthReq(tpAniSirGlobal pMac)
{
tpCsrNeighborRoamControlInfo pNeighborRoamInfo = &pMac->roam.neighborRoamInfo;
eHalStatus status = eHAL_STATUS_SUCCESS;
tpCsrNeighborRoamBSSInfo pNeighborBssNode;
/* This must not be true here */
VOS_ASSERT(pNeighborRoamInfo->FTRoamInfo.preauthRspPending == eANI_BOOLEAN_FALSE);
/* Issue Preauth request to PE here */
/* Need to issue the preauth request with the BSSID that is there in the head of the roamable AP list */
/* Parameters that should be passed are BSSID, Channel number and the neighborScanPeriod(probably) */
/* If roamableAPList gets empty, should transition to REPORT_SCAN state */
pNeighborBssNode = csrNeighborRoamGetRoamableAPListNextEntry(pMac, &pNeighborRoamInfo->roamableAPList, NULL);
if (NULL == pNeighborBssNode)
{
smsLog(pMac, LOG1, FL("Roamable AP list is empty.. "));
return eHAL_STATUS_FAILURE;
}
else
{
status = csrRoamEnqueuePreauth(pMac, pNeighborRoamInfo->csrSessionId, pNeighborBssNode->pBssDescription,
eCsrPerformPreauth, eANI_BOOLEAN_TRUE);
smsLog(pMac, LOGE, FL("Before Pre-Auth: BSSID %02x:%02x:%02x:%02x:%02x:%02x %d"),
pNeighborBssNode->pBssDescription->bssId[0],
pNeighborBssNode->pBssDescription->bssId[1],
pNeighborBssNode->pBssDescription->bssId[2],
pNeighborBssNode->pBssDescription->bssId[3],
pNeighborBssNode->pBssDescription->bssId[4],
pNeighborBssNode->pBssDescription->bssId[5]);
smsLog(pMac, LOGE, FL("Before Pre-Auth: Channel %d\n"), (int)pNeighborBssNode->pBssDescription->channelId);
if (eHAL_STATUS_SUCCESS != status)
{
smsLog(pMac, LOGE, FL("Send Preauth request to PE failed with status %d\n"), status);
return status;
}
}
pNeighborRoamInfo->FTRoamInfo.preauthRspPending = eANI_BOOLEAN_TRUE;
/* Increment the preauth retry count */
pNeighborRoamInfo->FTRoamInfo.numPreAuthRetries++;
/* Transition the state to preauthenticating */
CSR_NEIGHBOR_ROAM_STATE_TRANSITION(eCSR_NEIGHBOR_ROAM_STATE_PREAUTHENTICATING)
#if 0
/* Start the preauth rsp timer */
status = palTimerStart(pMac->hHdd, pNeighborRoamInfo->FTRoamInfo.preAuthRspWaitTimer,
CSR_NEIGHBOR_ROAM_PREAUTH_RSP_WAIT_MULTIPLIER * pNeighborRoamInfo->cfgParams.neighborScanPeriod * PAL_TIMER_TO_MS_UNIT,
eANI_BOOLEAN_FALSE);
if (eHAL_STATUS_SUCCESS != status)
{
smsLog(pMac, LOGE, FL("Preauth response wait timer start failed with status %d\n"), status);
return status;
}
#endif
return status;
}
/* ---------------------------------------------------------------------------
\fn csrNeighborRoamPreauthRspHandler
\brief This function handle the Preauth response from PE
Every preauth is allowed max 3 tries if it fails. If a bssid failed
for more than MAX_TRIES, we will remove it from the list and try
with the next node in the roamable AP list and add the BSSID to pre-auth failed
list. If no more entries present in
roamable AP list, transition to REPORT_SCAN state
\param pMac - The handle returned by macOpen.
vosStatus - VOS_STATUS_SUCCESS/FAILURE/TIMEOUT status from PE
\return eHAL_STATUS_SUCCESS on success (i.e. pre-auth processed),
eHAL_STATUS_FAILURE otherwise
---------------------------------------------------------------------------*/
eHalStatus csrNeighborRoamPreauthRspHandler(tpAniSirGlobal pMac, VOS_STATUS vosStatus)
{
tpCsrNeighborRoamControlInfo pNeighborRoamInfo = &pMac->roam.neighborRoamInfo;
eHalStatus status = eHAL_STATUS_SUCCESS;
eHalStatus preauthProcessed = eHAL_STATUS_SUCCESS;
tpCsrNeighborRoamBSSInfo pPreauthRspNode = NULL;
if (eANI_BOOLEAN_FALSE == pNeighborRoamInfo->FTRoamInfo.preauthRspPending)
{
/* This can happen when we disconnect immediately
* after sending a pre-auth request. During processing
* of the disconnect command, we would have reset
* preauthRspPending and transitioned to INIT state.
*/
NEIGHBOR_ROAM_DEBUG(pMac, LOGW,
FL("Unexpected pre-auth response in state %d\n"),
pNeighborRoamInfo->neighborRoamState);
preauthProcessed = eHAL_STATUS_FAILURE;
goto DEQ_PREAUTH;
}
// We can receive it in these 2 states.
if ((pNeighborRoamInfo->neighborRoamState != eCSR_NEIGHBOR_ROAM_STATE_PREAUTHENTICATING) &&
(pNeighborRoamInfo->neighborRoamState != eCSR_NEIGHBOR_ROAM_STATE_REPORT_SCAN))
{
NEIGHBOR_ROAM_DEBUG(pMac, LOGW, FL("Preauth response received in state %d\n"),
pNeighborRoamInfo->neighborRoamState);
preauthProcessed = eHAL_STATUS_FAILURE;
goto DEQ_PREAUTH;
}
if (VOS_STATUS_E_TIMEOUT != vosStatus)
{
#if 0
/* This means we got the response from PE. Hence stop the timer */
status = palTimerStop(pMac->hHdd, pNeighborRoamInfo->FTRoamInfo.preAuthRspWaitTimer);
#endif
pNeighborRoamInfo->FTRoamInfo.preauthRspPending = eANI_BOOLEAN_FALSE;
}
if (VOS_STATUS_SUCCESS == vosStatus)
{
pPreauthRspNode = csrNeighborRoamGetRoamableAPListNextEntry(pMac, &pNeighborRoamInfo->roamableAPList, NULL);
}
if ((VOS_STATUS_SUCCESS == vosStatus) && (NULL != pPreauthRspNode))
{
NEIGHBOR_ROAM_DEBUG(pMac, LOGE, FL("Preauth completed successfully after %d tries\n"), pNeighborRoamInfo->FTRoamInfo.numPreAuthRetries);
smsLog(pMac, LOGE, FL("After Pre-Auth: BSSID %02x:%02x:%02x:%02x:%02x:%02x\n"),
pPreauthRspNode->pBssDescription->bssId[0],
pPreauthRspNode->pBssDescription->bssId[1],
pPreauthRspNode->pBssDescription->bssId[2],
pPreauthRspNode->pBssDescription->bssId[3],
pPreauthRspNode->pBssDescription->bssId[4],
pPreauthRspNode->pBssDescription->bssId[5]);
smsLog(pMac, LOGE, FL("After Pre-Auth: Channel %d\n"), (int)pPreauthRspNode->pBssDescription->channelId);
/* Preauth competer successfully. Insert the preauthenticated node to tail of preAuthDoneList */
csrNeighborRoamRemoveRoamableAPListEntry(pMac, &pNeighborRoamInfo->roamableAPList, pPreauthRspNode);
csrLLInsertTail(&pNeighborRoamInfo->FTRoamInfo.preAuthDoneList, &pPreauthRspNode->List, LL_ACCESS_LOCK);
/* Pre-auth completed successfully. Transition to PREAUTH Done state */
CSR_NEIGHBOR_ROAM_STATE_TRANSITION(eCSR_NEIGHBOR_ROAM_STATE_PREAUTH_DONE)
pNeighborRoamInfo->FTRoamInfo.numPreAuthRetries = 0;
/* The caller of this function would start a timer and by the time it expires, supplicant should
have provided the updated FTIEs to SME. So, when it expires, handoff will be triggered then */
}
else
{
tpCsrNeighborRoamBSSInfo pNeighborBssNode = NULL;
tListElem *pEntry;
smsLog(pMac, LOGE, FL("Preauth failed retry number %d, status = %d\n"), pNeighborRoamInfo->FTRoamInfo.numPreAuthRetries, vosStatus);
/* Preauth failed. Add the bssId to the preAuth failed list MAC Address. Also remove the AP from roamable AP list */
if (pNeighborRoamInfo->FTRoamInfo.numPreAuthRetries >= CSR_NEIGHBOR_ROAM_MAX_NUM_PREAUTH_RETRIES)
{
/* We are going to remove the node as it fails for more than MAX tries. Reset this count to 0 */
pNeighborRoamInfo->FTRoamInfo.numPreAuthRetries = 0;
/* The one in the head of the list should be one with which we issued pre-auth and failed */
pEntry = csrLLRemoveHead(&pNeighborRoamInfo->roamableAPList, LL_ACCESS_LOCK);
if(pEntry)
{
pNeighborBssNode = GET_BASE_ADDR(pEntry, tCsrNeighborRoamBSSInfo, List);
/* Add the BSSID to pre-auth fail list */
status = csrNeighborRoamAddBssIdToPreauthFailList(pMac, pNeighborBssNode->pBssDescription->bssId);
/* Now we can free this node */
csrNeighborRoamFreeNeighborRoamBSSNode(pMac, pNeighborBssNode);
}
}
/* Issue preauth request for the same/next entry */
if (eHAL_STATUS_SUCCESS == csrNeighborRoamIssuePreauthReq(pMac))
goto DEQ_PREAUTH;
CSR_NEIGHBOR_ROAM_STATE_TRANSITION(eCSR_NEIGHBOR_ROAM_STATE_REPORT_SCAN);
/* Register Neighbor Lookup threshold callback with TL for UP event now */
NEIGHBOR_ROAM_DEBUG(pMac, LOGE, FL("No more pre-auth candidates-"
"register UP indication with TL. RSSI = %d,"), NEIGHBOR_ROAM_LOOKUP_UP_THRESHOLD * (-1));
vosStatus = WLANTL_RegRSSIIndicationCB(pMac->roam.gVosContext,
(v_S7_t)NEIGHBOR_ROAM_LOOKUP_UP_THRESHOLD * (-1),
WLANTL_HO_THRESHOLD_UP,
csrNeighborRoamNeighborLookupUPCallback,
VOS_MODULE_ID_SME, pMac);
if(!VOS_IS_STATUS_SUCCESS(vosStatus))
{
//err msg
smsLog(pMac, LOGE, FL(" Couldn't register csrNeighborRoamNeighborLookupCallback UP event with TL: Status = %d\n"), status);
}
/* Start the neighbor results refresh timer and transition to REPORT_SCAN state to perform scan again */
status = palTimerStart(pMac->hHdd, pNeighborRoamInfo->neighborResultsRefreshTimer,
pNeighborRoamInfo->cfgParams.neighborResultsRefreshPeriod * PAL_TIMER_TO_MS_UNIT,
eANI_BOOLEAN_FALSE);
if (eHAL_STATUS_SUCCESS != status)
{
smsLog(pMac, LOGE, FL("Neighbor results refresh timer start failed with status %d\n"), status);
}
}
DEQ_PREAUTH:
csrRoamDequeuePreauth(pMac);
return preauthProcessed;
}
#endif /* WLAN_FEATURE_NEIGHBOR_ROAMING */
/* ---------------------------------------------------------------------------
\fn csrNeighborRoamPrepareScanProfileFilter
\brief This function creates a scan filter based on the currently connected profile.
Based on this filter, scan results are obtained
\param pMac - The handle returned by macOpen.
pScanFilter - Populated scan filter based on the connected profile
\return eHAL_STATUS_SUCCESS on success, eHAL_STATUS_FAILURE otherwise
---------------------------------------------------------------------------*/
eHalStatus csrNeighborRoamPrepareScanProfileFilter(tpAniSirGlobal pMac, tCsrScanResultFilter *pScanFilter)
{
tpCsrNeighborRoamControlInfo pNeighborRoamInfo = &pMac->roam.neighborRoamInfo;
tANI_U8 sessionId = (tANI_U8)pNeighborRoamInfo->csrSessionId;
tCsrRoamConnectedProfile *pCurProfile = &pMac->roam.roamSession[sessionId].connectedProfile;
tANI_U8 i = 0;
VOS_ASSERT(pScanFilter != NULL);
vos_mem_zero(pScanFilter, sizeof(tCsrScanResultFilter));
/* We dont want to set BSSID based Filter */
pScanFilter->BSSIDs.numOfBSSIDs = 0;
/* Populate all the information from the connected profile */
pScanFilter->SSIDs.numOfSSIDs = 1;
pScanFilter->SSIDs.SSIDList = vos_mem_malloc(sizeof(tCsrSSIDInfo));
if (NULL == pScanFilter->SSIDs.SSIDList)
{
smsLog(pMac, LOGE, FL("Scan Filter SSID mem alloc failed"));
return eHAL_STATUS_FAILED_ALLOC;
}
pScanFilter->SSIDs.SSIDList->handoffPermitted = 1;
pScanFilter->SSIDs.SSIDList->ssidHidden = 0;
pScanFilter->SSIDs.SSIDList->SSID.length = pCurProfile->SSID.length;
vos_mem_copy((void *)pScanFilter->SSIDs.SSIDList->SSID.ssId, (void *)pCurProfile->SSID.ssId, pCurProfile->SSID.length);
NEIGHBOR_ROAM_DEBUG(pMac, LOGE, FL("Filtering for SSID %s from scan results.. SSID Length = %d\n"),
pScanFilter->SSIDs.SSIDList->SSID.ssId, pScanFilter->SSIDs.SSIDList->SSID.length);
pScanFilter->authType.numEntries = 1;
pScanFilter->authType.authType[0] = pCurProfile->AuthType;
pScanFilter->EncryptionType.numEntries = 1; //This must be 1
pScanFilter->EncryptionType.encryptionType[0] = pCurProfile->EncryptionType;
pScanFilter->mcEncryptionType.numEntries = 1;
pScanFilter->mcEncryptionType.encryptionType[0] = pCurProfile->mcEncryptionType;
pScanFilter->BSSType = pCurProfile->BSSType;
/* We are intrested only in the scan results on channels that we scanned */
pScanFilter->ChannelInfo.numOfChannels = pNeighborRoamInfo->roamChannelInfo.currentChannelListInfo.numOfChannels;
pScanFilter->ChannelInfo.ChannelList = vos_mem_malloc(pScanFilter->ChannelInfo.numOfChannels * sizeof(tANI_U8));
if (NULL == pScanFilter->ChannelInfo.ChannelList)
{
smsLog(pMac, LOGE, FL("Scan Filter Channel list mem alloc failed"));
vos_mem_free(pScanFilter->SSIDs.SSIDList);
pScanFilter->SSIDs.SSIDList = NULL;
return eHAL_STATUS_FAILED_ALLOC;
}
for (i = 0; i < pScanFilter->ChannelInfo.numOfChannels; i++)
{
pScanFilter->ChannelInfo.ChannelList[i] = pNeighborRoamInfo->roamChannelInfo.currentChannelListInfo.ChannelList[i];
}
#ifdef WLAN_FEATURE_VOWIFI_11R
if (pNeighborRoamInfo->is11rAssoc)
{
/* MDIE should be added as a part of profile. This should be added as a part of filter as well */
pScanFilter->MDID.mdiePresent = pCurProfile->MDID.mdiePresent;
pScanFilter->MDID.mobilityDomain = pCurProfile->MDID.mobilityDomain;
}
#endif
return eHAL_STATUS_SUCCESS;
}
tANI_U32 csrGetCurrentAPRssi(tpAniSirGlobal pMac, tScanResultHandle *pScanResultList)
{
tCsrScanResultInfo *pScanResult;
tpCsrNeighborRoamControlInfo pNeighborRoamInfo = &pMac->roam.neighborRoamInfo;
tANI_U32 CurrAPRssi = -125; /* We are setting this as default value to make sure we return this value,
when we do not see this AP in the scan result for some reason.However,it is
less likely that we are associated to an AP and do not see it in the scan list*/
while (NULL != (pScanResult = csrScanResultGetNext(pMac, *pScanResultList)))
{
if (VOS_TRUE == vos_mem_compare(pScanResult->BssDescriptor.bssId,
pNeighborRoamInfo->currAPbssid, sizeof(tSirMacAddr)))
{
/* We got a match with the currently associated AP.
* Capture the RSSI value and complete the while loop.
* The while loop is completed in order to make the current entry go back to NULL,
* and in the next while loop, it properly starts searching from the head of the list.
* TODO: Can also try setting the current entry directly to NULL as soon as we find the new AP*/
CurrAPRssi = (int)pScanResult->BssDescriptor.rssi * (-1) ;
} else {
continue;
}
}
return CurrAPRssi;
}
/* ---------------------------------------------------------------------------
\fn csrNeighborRoamProcessScanResults
\brief This function extracts scan results, sorts on the basis of neighbor score(todo).
Assumed that the results are already sorted by RSSI by csrScanGetResult
\param pMac - The handle returned by macOpen.
pScanResultList - Scan result result obtained from csrScanGetResult()
\return tANI_BOOLEAN - return TRUE if we have a candidate we can immediately
roam to. Otherwise, return FALSE.
---------------------------------------------------------------------------*/
static tANI_BOOLEAN csrNeighborRoamProcessScanResults(tpAniSirGlobal pMac,
tScanResultHandle *pScanResultList)
{
tCsrScanResultInfo *pScanResult;
tpCsrNeighborRoamControlInfo pNeighborRoamInfo = &pMac->roam.neighborRoamInfo;
tpCsrNeighborRoamBSSInfo pBssInfo;
tANI_U32 CurrAPRssi;
tANI_U8 RoamRssiDiff = pMac->roam.configParam.RoamRssiDiff;
#if defined (WLAN_FEATURE_VOWIFI_11R) || defined (FEATURE_WLAN_CCX) || defined(FEATURE_WLAN_LFR)
tANI_U8 immediateRoamRssiDiff = pMac->roam.configParam.nImmediateRoamRssiDiff;
#endif
tANI_BOOLEAN roamNow = eANI_BOOLEAN_FALSE;
/***************************************************************
* Find out the Current AP RSSI and keep it handy to check if
* it is better than the RSSI of the AP which we are
* going to roam.If so, we are going to continue with the
* current AP.
***************************************************************/
CurrAPRssi = csrGetCurrentAPRssi(pMac, pScanResultList);
/* Expecting the scan result already to be in the sorted order based on the RSSI */
/* Based on the previous state we need to check whether the list should be sorted again taking neighbor score into consideration */
/* If previous state is CFG_CHAN_LIST_SCAN, there should not be any neighbor score associated with any of the BSS.
If the previous state is REPORT_QUERY, then there will be neighbor score for each of the APs */
/* For now, let us take the top of the list provided as it is by the CSR Scan result API. This means it is assumed that neighbor score
and rssi score are in the same order. This will be taken care later */
while (NULL != (pScanResult = csrScanResultGetNext(pMac, *pScanResultList)))
{
NEIGHBOR_ROAM_DEBUG(pMac, LOGE,
FL("Scan result: BSSID %02x:%02x:%02x:%02x:%02x:%02x (Rssi %d)"),
pScanResult->BssDescriptor.bssId[0],
pScanResult->BssDescriptor.bssId[1],
pScanResult->BssDescriptor.bssId[2],
pScanResult->BssDescriptor.bssId[3],
pScanResult->BssDescriptor.bssId[4],
pScanResult->BssDescriptor.bssId[5],
abs(pScanResult->BssDescriptor.rssi));
if (VOS_TRUE == vos_mem_compare(pScanResult->BssDescriptor.bssId,
pNeighborRoamInfo->currAPbssid, sizeof(tSirMacAddr)))
{
/* currently associated AP. Do not have this in the roamable AP list */
VOS_TRACE (VOS_MODULE_ID_SME, VOS_TRACE_LEVEL_INFO,
"SKIP-currently associated AP\n");
continue;
}
/* This condition is to ensure to roam to an AP with better RSSI. if the value of RoamRssiDiff is Zero, this feature
* is disabled and we continue to roam without any check*/
if(RoamRssiDiff > 0)
{
/*
* If RSSI is lower than the lookup threshold, then continue.
*/
if (abs(pScanResult->BssDescriptor.rssi) >
pNeighborRoamInfo->currentNeighborLookupThreshold)
{
VOS_TRACE (VOS_MODULE_ID_SME, VOS_TRACE_LEVEL_INFO,
"%s: [INFOLOG] new ap rssi (%d) lower than lookup threshold (%d)\n",
__func__, (int)pScanResult->BssDescriptor.rssi * (-1),
(int)pNeighborRoamInfo->currentNeighborLookupThreshold * (-1));
continue;
}
if (abs(CurrAPRssi) < abs(pScanResult->BssDescriptor.rssi))
{
/*Do not roam to an AP with worse RSSI than the current*/
VOS_TRACE (VOS_MODULE_ID_SME, VOS_TRACE_LEVEL_INFO,
"%s: [INFOLOG]Current AP rssi=%d new ap rssi worse=%d\n", __func__,
CurrAPRssi,
(int)pScanResult->BssDescriptor.rssi * (-1) );
continue;
} else {
/*Do not roam to an AP which is having better RSSI than the current AP, but still less than the
* margin that is provided by user from the ini file (RoamRssiDiff)*/
if (abs(abs(CurrAPRssi) - abs(pScanResult->BssDescriptor.rssi)) < RoamRssiDiff)
{
VOS_TRACE (VOS_MODULE_ID_SME, VOS_TRACE_LEVEL_INFO,
"%s: [INFOLOG]Current AP rssi=%d new ap rssi=%d not good enough, roamRssiDiff=%d\n", __func__,
CurrAPRssi,
(int)pScanResult->BssDescriptor.rssi * (-1),
RoamRssiDiff);
continue;
}
else {
VOS_TRACE (VOS_MODULE_ID_SME, VOS_TRACE_LEVEL_INFO,
"%s: [INFOLOG]Current AP rssi=%d new ap rssi better=%d\n", __func__,
CurrAPRssi,
(int)pScanResult->BssDescriptor.rssi * (-1) );
}
}
}
#ifdef WLAN_FEATURE_VOWIFI_11R
if (pNeighborRoamInfo->is11rAssoc)
{
if (!csrNeighborRoamIsPreauthCandidate(pMac, pScanResult->BssDescriptor.bssId))
{
smsLog(pMac, LOGE, FL("BSSID present in pre-auth fail list.. Ignoring"));
continue;
}
}
#endif /* WLAN_FEATURE_VOWIFI_11R */
#ifdef FEATURE_WLAN_CCX
if (pNeighborRoamInfo->isCCXAssoc)
{
if (!csrNeighborRoamIsPreauthCandidate(pMac, pScanResult->BssDescriptor.bssId))
{
smsLog(pMac, LOGE, FL("BSSID present in pre-auth fail list.. Ignoring"));
continue;
}
}
if ((pScanResult->BssDescriptor.QBSSLoad_present) &&
(pScanResult->BssDescriptor.QBSSLoad_avail))
{
if (pNeighborRoamInfo->isVOAdmitted)
{
smsLog(pMac, LOG1, FL("New AP has %x BW available\n"), (unsigned int)pScanResult->BssDescriptor.QBSSLoad_avail);
smsLog(pMac, LOG1, FL("We need %x BW available\n"),(unsigned int)pNeighborRoamInfo->MinQBssLoadRequired);
if (pScanResult->BssDescriptor.QBSSLoad_avail < pNeighborRoamInfo->MinQBssLoadRequired)
{
VOS_TRACE (VOS_MODULE_ID_SME, VOS_TRACE_LEVEL_INFO,
"[INFOLOG]BSSID : %02x:%02x:%02x:%02x:%02x:%02x has no bandwidth ignoring..not adding to roam list\n",
pScanResult->BssDescriptor.bssId[0],
pScanResult->BssDescriptor.bssId[1],
pScanResult->BssDescriptor.bssId[2],
pScanResult->BssDescriptor.bssId[3],
pScanResult->BssDescriptor.bssId[4],
pScanResult->BssDescriptor.bssId[5]);
continue;
}
}
}
else
{
smsLog(pMac, LOGE, FL("No QBss %x %x\n"), (unsigned int)pScanResult->BssDescriptor.QBSSLoad_avail, (unsigned int)pScanResult->BssDescriptor.QBSSLoad_present);
if (pNeighborRoamInfo->isVOAdmitted)
{
VOS_TRACE (VOS_MODULE_ID_SME, VOS_TRACE_LEVEL_INFO,
"[INFOLOG]BSSID : %02x:%02x:%02x:%02x:%02x:%02x has no QBSSLoad IE, ignoring..not adding to roam list\n",
pScanResult->BssDescriptor.bssId[0],
pScanResult->BssDescriptor.bssId[1],
pScanResult->BssDescriptor.bssId[2],
pScanResult->BssDescriptor.bssId[3],
pScanResult->BssDescriptor.bssId[4],
pScanResult->BssDescriptor.bssId[5]);
continue;
}
}
#endif /* FEATURE_WLAN_CCX */
#ifdef FEATURE_WLAN_LFR
// If we are supporting legacy roaming, and
// if the candidate is on the "pre-auth failed" list, ignore it.
if (csrRoamIsFastRoamEnabled(pMac, CSR_SESSION_ID_INVALID))
{
if (!csrNeighborRoamIsPreauthCandidate(pMac, pScanResult->BssDescriptor.bssId))
{
smsLog(pMac, LOGE, FL("BSSID present in pre-auth fail list.. Ignoring"));
continue;
}
}
#endif /* FEATURE_WLAN_LFR */
/* If the received timestamp in BSS description is earlier than the scan request timestamp, skip
* this result */
if (pNeighborRoamInfo->scanRequestTimeStamp >= pScanResult->BssDescriptor.nReceivedTime)
{
smsLog(pMac, LOGE, FL("Ignoring BSS as it is older than the scan request timestamp"));
continue;
}
pBssInfo = vos_mem_malloc(sizeof(tCsrNeighborRoamBSSInfo));
if (NULL == pBssInfo)
{
smsLog(pMac, LOGE, FL("Memory allocation for Neighbor Roam BSS Info failed.. Just ignoring"));
continue;
}
pBssInfo->pBssDescription = vos_mem_malloc(pScanResult->BssDescriptor.length + sizeof(pScanResult->BssDescriptor.length));
if (pBssInfo->pBssDescription != NULL)
{
vos_mem_copy(pBssInfo->pBssDescription, &pScanResult->BssDescriptor,
pScanResult->BssDescriptor.length + sizeof(pScanResult->BssDescriptor.length));
}
else
{
smsLog(pMac, LOGE, FL("Memory allocation for Neighbor Roam BSS Descriptor failed.. Just ignoring"));
vos_mem_free(pBssInfo);
continue;
}
pBssInfo->apPreferenceVal = 10; //some value for now. Need to calculate the actual score based on RSSI and neighbor AP score
/* Just add to the end of the list as it is already sorted by RSSI */
csrLLInsertTail(&pNeighborRoamInfo->roamableAPList, &pBssInfo->List, LL_ACCESS_LOCK);
#if defined (WLAN_FEATURE_VOWIFI_11R) || defined (FEATURE_WLAN_CCX) || defined(FEATURE_WLAN_LFR)
if (immediateRoamRssiDiff &&
(abs(abs(CurrAPRssi) - abs(pScanResult->BssDescriptor.rssi)) >= immediateRoamRssiDiff))
{
VOS_TRACE (VOS_MODULE_ID_SME, VOS_TRACE_LEVEL_INFO,
"%s: [INFOLOG] potential candidate to roam immediately (diff=%d, expected=%d)",
__func__, abs(abs(CurrAPRssi) - abs(pScanResult->BssDescriptor.rssi)),
immediateRoamRssiDiff);
roamNow = eANI_BOOLEAN_TRUE;
}
#endif
}
/* Now we have all the scan results in our local list. Good time to free up the the list we got as a part of csrGetScanResult */
csrScanResultPurge(pMac, *pScanResultList);
return roamNow;
}
/* ---------------------------------------------------------------------------
\fn csrNeighborRoamHandleEmptyScanResult
\brief This function will be invoked in CFG_CHAN_LIST_SCAN state when
there are no valid APs in the scan result for roaming. This means
our AP is the best and no other AP is around. No point in scanning
again and again. Performing the following here.
1. Stop the neighbor scan timer.
2a. If this is the first time we encountered empty scan, then
re-register with TL with modified lookup threshold.
2b. Else if this is the second time we encountered empty scan,
then start neighbor scan results refresh timer (20s).
2c. Else, nothing more to do.
NOTE: In LFR, channels selected for scanning is dervied from
the occuped channel list. Scan cycle following one which
yielded empty results is split into two halves: (i) scan on
channels in the occupied list, and (ii) scan on channels not
in the occupied list. This helps converging faster (while
looking for candidates in the occupied list first), and also,
adds channels to the occupied channel list upon finding candidates
matching SSID profile of interest.
uEmptyScanCount Comments
eFirstEmptyScan Previous scan was done on channels in the
occupied list and yielded potential candidates.
This scan cycle was likely triggered through
receipt of lookup DOWN notification event.
eSecondEmptyScan Previous scan was done on channels in the
occupied list and yielded no candidates. This scan
cycle was triggered through RSSI notification
with modified lookup threshold.
eThirdEmptyScan Previous scan was done on channels NOT in
the occupied list and yielded no candidates. This
scan cycle was triggered immediately after scanning
channels in the occupied list and no candidates
were found.
eFourthEmptyScan Previous scan was done on channels in the
occupied list and yielded no candidates. This scan
cycle was triggered upon expiry of
neighborScanResultsRefreshPeriod (=20s).
eFifthEmptyScan Previous scan was done on channels NOT in
the occupied list and yielded no candidates. This
scan cycle was triggered immediately after scanning
channels in the occupied list and no candidates
were found.
[1], [2,3] and [4,5] together form one discrete set of scan cycle.
\param pMac - The handle returned by macOpen.
\return VOS_STATUS_SUCCESS on success, corresponding error code otherwise
---------------------------------------------------------------------------*/
static VOS_STATUS csrNeighborRoamHandleEmptyScanResult(tpAniSirGlobal pMac)
{
VOS_STATUS vosStatus = VOS_STATUS_SUCCESS;
tpCsrNeighborRoamControlInfo pNeighborRoamInfo = &pMac->roam.neighborRoamInfo;
eHalStatus status = eHAL_STATUS_SUCCESS;
/* Stop neighbor scan timer */
status = palTimerStop(pMac->hHdd, pNeighborRoamInfo->neighborScanTimer);
if (eHAL_STATUS_SUCCESS != status)
{
smsLog(pMac, LOGW, FL(" palTimerStop failed with status %d\n"), status);
}
/*
* Increase the neighbor lookup threshold by 3 dB
* after every scan cycle. NOTE: uEmptyScanCount
* would be either 1, 3 or 5 at the end of every
* scan cycle.
*/
#ifdef FEATURE_WLAN_LFR
if ((++pNeighborRoamInfo->uEmptyScanCount) > eFifthEmptyScan)
{
pNeighborRoamInfo->uEmptyScanCount = eFifthEmptyScan;
}
#endif
if (((pNeighborRoamInfo->currentNeighborLookupThreshold+3) <
pNeighborRoamInfo->cfgParams.neighborReassocThreshold)
#ifdef FEATURE_WLAN_LFR
&& ((pNeighborRoamInfo->uEmptyScanCount % 2) == 1)
#endif
)
{
pNeighborRoamInfo->currentNeighborLookupThreshold += 3;
}
#ifdef WLAN_FEATURE_VOWIFI_11R
/* Clear off the old neighbor report details */
vos_mem_zero(&pNeighborRoamInfo->FTRoamInfo.neighboReportBssInfo, sizeof(tCsrNeighborReportBssInfo) * MAX_BSS_IN_NEIGHBOR_RPT);
#endif
#ifdef FEATURE_WLAN_LFR
if (pNeighborRoamInfo->uEmptyScanCount == eFirstEmptyScan)
{
#endif
/* Empty scan results for the first time */
/* Transition to CONNECTED state */
CSR_NEIGHBOR_ROAM_STATE_TRANSITION(eCSR_NEIGHBOR_ROAM_STATE_CONNECTED);
/* Reset all the necessary variables before transitioning to the CONNECTED state */
csrNeighborRoamResetConnectedStateControlInfo(pMac);
/* Re-register neighbor lookup DOWN threshold callback with TL */
NEIGHBOR_ROAM_DEBUG(pMac, LOGE,
FL("Registering DOWN event neighbor lookup callback with TL for RSSI = %d"),
pNeighborRoamInfo->currentNeighborLookupThreshold * (-1));
vosStatus = WLANTL_RegRSSIIndicationCB(pMac->roam.gVosContext,
(v_S7_t)pNeighborRoamInfo->currentNeighborLookupThreshold * (-1),
WLANTL_HO_THRESHOLD_DOWN,
csrNeighborRoamNeighborLookupDOWNCallback,
VOS_MODULE_ID_SME, pMac);
if(!VOS_IS_STATUS_SUCCESS(vosStatus))
{
smsLog(pMac, LOGW,
FL("Couldn't re-register csrNeighborRoamNeighborLookupDOWNCallback"
" with TL: Status = %d\n"), status);
}
#ifdef FEATURE_WLAN_LFR
}
else if ((pNeighborRoamInfo->uEmptyScanCount == eSecondEmptyScan) ||
(pNeighborRoamInfo->uEmptyScanCount == eFourthEmptyScan))
{
/* Empty scan results for the second or fourth time */
/* Transition to CONNECTED state */
CSR_NEIGHBOR_ROAM_STATE_TRANSITION(eCSR_NEIGHBOR_ROAM_STATE_CONNECTED);
/* Reset all the necessary variables before transitioning to the CONNECTED state */
csrNeighborRoamResetConnectedStateControlInfo(pMac);
/* Immediately scan on channels in non-occupied list */
csrNeighborRoamTransitToCFGChanScan(pMac);
}
else if (pNeighborRoamInfo->uEmptyScanCount == eThirdEmptyScan)
{
/* Empty scan results for the third time */
/* Remain in eCSR_NEIGHBOR_ROAM_STATE_CFG_CHAN_LIST_SCAN */
/* Start neighbor scan results refresh timer */
if (eHAL_STATUS_SUCCESS !=
palTimerStart(pMac->hHdd, pNeighborRoamInfo->neighborResultsRefreshTimer,
pNeighborRoamInfo->cfgParams.neighborResultsRefreshPeriod * PAL_TIMER_TO_MS_UNIT,
eANI_BOOLEAN_FALSE))
{
smsLog(pMac, LOGE, FL("Neighbor results refresh timer failed to start (%d)"),
status);
vos_mem_free(pNeighborRoamInfo->roamChannelInfo.currentChannelListInfo.ChannelList);
pNeighborRoamInfo->roamChannelInfo.currentChannelListInfo.ChannelList = NULL;
vosStatus = VOS_STATUS_E_FAILURE;
}
else
{
smsLog(pMac, LOG2, FL("Neighbor results refresh timer started (%ld ms)"),
(pNeighborRoamInfo->cfgParams.neighborResultsRefreshPeriod * PAL_TIMER_TO_MS_UNIT));
}
}
else
{
/* Do nothing */
/* Transition to CONNECTED state */
CSR_NEIGHBOR_ROAM_STATE_TRANSITION(eCSR_NEIGHBOR_ROAM_STATE_CONNECTED);
/* Reset all the necessary variables before transitioning to the CONNECTED state */
csrNeighborRoamResetConnectedStateControlInfo(pMac);
}
NEIGHBOR_ROAM_DEBUG(pMac, LOG2, "Neighbor roam empty scan count=%d",
pNeighborRoamInfo->uEmptyScanCount);
#endif
return vosStatus;
}
/* ---------------------------------------------------------------------------
\fn csrNeighborRoamScanRequestCallback
\brief This function is the callback function registered in csrScanRequest() to
indicate the completion of scan. If scan is completed for all the channels in
the channel list, this function gets the scan result and starts the refresh results
timer to avoid having stale results. If scan is not completed on all the channels,
it restarts the neighbor scan timer which on expiry issues scan on the next
channel
\param halHandle - The handle returned by macOpen.
pContext - not used
scanId - not used
status - not used
\return eHAL_STATUS_SUCCESS on success, corresponding error code otherwise
---------------------------------------------------------------------------*/
static eHalStatus csrNeighborRoamScanRequestCallback(tHalHandle halHandle, void *pContext,
tANI_U32 scanId, eCsrScanStatus status)
{
tpAniSirGlobal pMac = (tpAniSirGlobal) halHandle;
tpCsrNeighborRoamControlInfo pNeighborRoamInfo = &pMac->roam.neighborRoamInfo;
tANI_U8 currentChanIndex;
tCsrScanResultFilter scanFilter;
tScanResultHandle scanResult;
tANI_U32 tempVal = 0;
eHalStatus hstatus;
tANI_BOOLEAN roamNow = eANI_BOOLEAN_FALSE;
pMac->roam.neighborRoamInfo.scanRspPending = eANI_BOOLEAN_FALSE;
/* This can happen when we receive a UP event from TL in any of the scan states. Silently ignore it */
if (eCSR_NEIGHBOR_ROAM_STATE_CONNECTED == pNeighborRoamInfo->neighborRoamState)
{
smsLog(pMac, LOGE, FL("Received in CONNECTED state. Must be because a UP event from TL after issuing scan request. Ignore it"));
return eHAL_STATUS_SUCCESS;
}
/* -1 is done because the chanIndex would have got incremented after issuing a successful scan request */
currentChanIndex = (pMac->roam.neighborRoamInfo.roamChannelInfo.currentChanIndex) ? (pMac->roam.neighborRoamInfo.roamChannelInfo.currentChanIndex - 1) : 0;
/* Validate inputs */
if (pMac->roam.neighborRoamInfo.roamChannelInfo.currentChannelListInfo.ChannelList) {
NEIGHBOR_ROAM_DEBUG(pMac, LOGW, FL("csrNeighborRoamScanRequestCallback received for Channel = %d, ChanIndex = %d"),
pMac->roam.neighborRoamInfo.roamChannelInfo.currentChannelListInfo.ChannelList[currentChanIndex], currentChanIndex);
}
else
{
smsLog(pMac, LOG1, FL("Received during clean-up. Silently ignore scan completion event."));
return eHAL_STATUS_SUCCESS;
}
if (eANI_BOOLEAN_FALSE == pNeighborRoamInfo->roamChannelInfo.chanListScanInProgress)
{
/* Scan is completed in the CFG_CHAN_SCAN state. We can transition to REPORT_SCAN state
just to get the results and perform PREAUTH */
/* Now we have completed scanning the channel list. We have get the result by applying appropriate filter
sort the results based on neighborScore and RSSI and select the best candidate out of the list */
NEIGHBOR_ROAM_DEBUG(pMac, LOGW, FL("Channel list scan completed. Current chan index = %d"), currentChanIndex);
VOS_ASSERT(pNeighborRoamInfo->roamChannelInfo.currentChanIndex == 0);
#if defined (WLAN_FEATURE_VOWIFI_11R) || defined (FEATURE_WLAN_CCX) || defined(FEATURE_WLAN_LFR)
/* If the state is REPORT_SCAN, then this must be the scan after the REPORT_QUERY state. So, we
should use the BSSID filter made out of neighbor reports */
if (eCSR_NEIGHBOR_ROAM_STATE_REPORT_SCAN == pNeighborRoamInfo->neighborRoamState)
{
hstatus = csrNeighborRoamBssIdScanFilter(pMac, &scanFilter);
NEIGHBOR_ROAM_DEBUG(pMac, LOGW, FL("11R or CCX Association: Prepare scan filter status with neighbor AP = %d"), hstatus);
tempVal = 1;
}
else
#endif
{
hstatus = csrNeighborRoamPrepareScanProfileFilter(pMac, &scanFilter);
NEIGHBOR_ROAM_DEBUG(pMac, LOGW, FL("11R/CCX/Other Association: Prepare scan to find neighbor AP filter status = %d"), hstatus);
}
if (eHAL_STATUS_SUCCESS != hstatus)
{
smsLog(pMac, LOGE, FL("Scan Filter preparation failed for Assoc type %d.. Bailing out.."), tempVal);
return eHAL_STATUS_FAILURE;
}
hstatus = csrScanGetResult(pMac, &scanFilter, &scanResult);
if (hstatus != eHAL_STATUS_SUCCESS)
{
NEIGHBOR_ROAM_DEBUG(pMac, LOGE, FL("Get Scan Result status code %d"), hstatus);
}
/* Process the scan results and update roamable AP list */
roamNow = csrNeighborRoamProcessScanResults(pMac, &scanResult);
/* Free the scan filter */
csrFreeScanFilter(pMac, &scanFilter);
tempVal = csrLLCount(&pNeighborRoamInfo->roamableAPList);
switch(pNeighborRoamInfo->neighborRoamState)
{
case eCSR_NEIGHBOR_ROAM_STATE_CFG_CHAN_LIST_SCAN:
if (tempVal)
{
#ifdef FEATURE_WLAN_LFR
/*
* Since there are non-zero candidates found
* after the scan, reset empty scan count.
*/
pNeighborRoamInfo->uEmptyScanCount = 0;
#endif
#ifdef WLAN_FEATURE_VOWIFI_11R
/* If this is a non-11r association, then we can register the reassoc callback here as we have some
APs in the roamable AP list */
if (pNeighborRoamInfo->is11rAssoc)
{
/* Valid APs are found after scan. Now we can initiate pre-authentication */
CSR_NEIGHBOR_ROAM_STATE_TRANSITION(eCSR_NEIGHBOR_ROAM_STATE_REPORT_SCAN)
}
else
#endif
#ifdef FEATURE_WLAN_CCX
/* If this is a non-11r association, then we can register the reassoc callback here as we have some
APs in the roamable AP list */
if (pNeighborRoamInfo->isCCXAssoc)
{
/* Valid APs are found after scan. Now we can initiate pre-authentication */
CSR_NEIGHBOR_ROAM_STATE_TRANSITION(eCSR_NEIGHBOR_ROAM_STATE_REPORT_SCAN)
}
else
#endif
#ifdef FEATURE_WLAN_LFR
/* If LFR is enabled, then we can register the reassoc callback here as we have some
APs in the roamable AP list */
if (csrRoamIsFastRoamEnabled(pMac, CSR_SESSION_ID_INVALID))
{
/* Valid APs are found after scan. Now we can initiate pre-authentication */
CSR_NEIGHBOR_ROAM_STATE_TRANSITION(eCSR_NEIGHBOR_ROAM_STATE_REPORT_SCAN)
}
else
#endif
{
NEIGHBOR_ROAM_DEBUG(pMac, LOGE, FL("Completed scanning of CFG CHAN LIST in non-11r association. Registering reassoc callback"));
/* Nothing much to do now. Will continue to remain in this state in case of non-11r association */
/* Stop the timer. But how long the roamable AP list will be valid in here. At some point of time, we
need to restart the CFG CHAN list scan procedure if reassoc callback is not invoked from TL
within certain duration */
// palTimerStop(pMac->hHdd, pNeighborRoamInfo->neighborScanTimer);
}
}
else
{
NEIGHBOR_ROAM_DEBUG(pMac, LOGE, FL("No candidate found after scanning in state %d.. "), pNeighborRoamInfo->neighborRoamState);
/* Handle it appropriately */
csrNeighborRoamHandleEmptyScanResult(pMac);
}
break;
#ifdef WLAN_FEATURE_VOWIFI_11R
case eCSR_NEIGHBOR_ROAM_STATE_REPORT_SCAN:
if (!tempVal)
{
smsLog(pMac, LOGE, FL("No candidate found after scanning in state %d.. "), pNeighborRoamInfo->neighborRoamState);
/* Stop the timer here as the same timer will be started again in CFG_CHAN_SCAN_STATE */
csrNeighborRoamTransitToCFGChanScan(pMac);
}
break;
#endif /* WLAN_FEATURE_VOWIFI_11R */
default:
// Can come only in INIT state. Where in we are associated, we sent scan and user
// in the meantime decides to disassoc, we will be in init state and still received call
// back issued. Should not come here in any other state, printing just in case
VOS_TRACE (VOS_MODULE_ID_SME, VOS_TRACE_LEVEL_INFO,
"%s: [INFOLOG] State %d\n", __func__, (pNeighborRoamInfo->neighborRoamState));
// Lets just exit out silently.
return eHAL_STATUS_SUCCESS;
}
if (tempVal)
{
VOS_STATUS vosStatus = VOS_STATUS_SUCCESS;
if (roamNow)
{
NEIGHBOR_ROAM_DEBUG(pMac, LOG2,
FL("Immediate roam-deregister UP indication. RSSI = %d"),
NEIGHBOR_ROAM_LOOKUP_UP_THRESHOLD * (-1));
vosStatus = WLANTL_DeregRSSIIndicationCB(pMac->roam.gVosContext,
(v_S7_t)NEIGHBOR_ROAM_LOOKUP_UP_THRESHOLD * (-1),
WLANTL_HO_THRESHOLD_UP,
csrNeighborRoamNeighborLookupUPCallback,
VOS_MODULE_ID_SME);
if(!VOS_IS_STATUS_SUCCESS(vosStatus))
{
smsLog(pMac, LOGW,
FL("Couldn't deregister lookup UP callback with TL: Status = %d\n"), vosStatus);
}
csrNeighborRoamTriggerHandoff(pMac, pNeighborRoamInfo);
return eHAL_STATUS_SUCCESS;
}
/* This timer should be started before registering the Reassoc callback with TL. This is because, it is very likely
* that the callback getting called immediately and the timer would never be stopped when pre-auth is in progress */
if (eHAL_STATUS_SUCCESS != palTimerStart(pMac->hHdd, pNeighborRoamInfo->neighborResultsRefreshTimer,
pNeighborRoamInfo->cfgParams.neighborResultsRefreshPeriod * PAL_TIMER_TO_MS_UNIT,
eANI_BOOLEAN_FALSE))
{
smsLog(pMac, LOGE, FL("Neighbor results refresh timer failed to start, status = %d"), status);
vos_mem_free(pNeighborRoamInfo->roamChannelInfo.currentChannelListInfo.ChannelList);
pNeighborRoamInfo->roamChannelInfo.currentChannelListInfo.ChannelList = NULL;
return eHAL_STATUS_FAILURE;
}
NEIGHBOR_ROAM_DEBUG(pMac, LOG2, FL("Registering DOWN event Reassoc callback with TL. RSSI = %d"), pNeighborRoamInfo->cfgParams.neighborReassocThreshold * (-1));
/* Register a reassoc Indication callback */
vosStatus = WLANTL_RegRSSIIndicationCB(pMac->roam.gVosContext, (v_S7_t)pNeighborRoamInfo->cfgParams.neighborReassocThreshold * (-1),
WLANTL_HO_THRESHOLD_DOWN,
csrNeighborRoamReassocIndCallback,
VOS_MODULE_ID_SME, pMac);
if(!VOS_IS_STATUS_SUCCESS(vosStatus))
{
//err msg
smsLog(pMac, LOGW, FL(" Couldn't register csrNeighborRoamReassocIndCallback with TL: Status = %d\n"), vosStatus);
}
}
}
else
{
/* Restart the timer for the next scan sequence as scanning is not over */
hstatus = palTimerStart(pMac->hHdd, pNeighborRoamInfo->neighborScanTimer,
pNeighborRoamInfo->cfgParams.neighborScanPeriod * PAL_TIMER_TO_MS_UNIT,
eANI_BOOLEAN_FALSE);
if (eHAL_STATUS_SUCCESS != hstatus)
{
/* Timer start failed.. Should we ASSERT here??? */
smsLog(pMac, LOGE, FL("Neighbor scan PAL Timer start failed, status = %d, Ignoring state transition"), status);
vos_mem_free(pNeighborRoamInfo->roamChannelInfo.currentChannelListInfo.ChannelList);
pNeighborRoamInfo->roamChannelInfo.currentChannelListInfo.ChannelList = NULL;
return eHAL_STATUS_FAILURE;
}
}
return eHAL_STATUS_SUCCESS;
}
/* ---------------------------------------------------------------------------
\fn csrNeighborRoamIssueBgScanRequest
\brief This function issues CSR scan request after populating all the BG scan params
passed
\param pMac - The handle returned by macOpen.
pBgScanParams - Params that need to be populated into csr Scan request
\return eHAL_STATUS_SUCCESS on success, corresponding error code otherwise
---------------------------------------------------------------------------*/
eHalStatus csrNeighborRoamIssueBgScanRequest(tpAniSirGlobal pMac, tCsrBGScanRequest *pBgScanParams)
{
eHalStatus status = eHAL_STATUS_SUCCESS;
tANI_U32 scanId;
tCsrScanRequest scanReq;
tANI_U8 channel;
NEIGHBOR_ROAM_DEBUG(pMac, LOGW, FL("csrNeighborRoamIssueBgScanRequest for Channel = %d, ChanIndex = %d"),
pBgScanParams->ChannelInfo.ChannelList[0], pMac->roam.neighborRoamInfo.roamChannelInfo.currentChanIndex);
//send down the scan req for 1 channel on the associated SSID
palZeroMemory(pMac->hHdd, &scanReq, sizeof(tCsrScanRequest));
/* Fill in the SSID Info */
scanReq.SSIDs.numOfSSIDs = 1;
scanReq.SSIDs.SSIDList = vos_mem_malloc(sizeof(tCsrSSIDInfo) * scanReq.SSIDs.numOfSSIDs);
if(NULL == scanReq.SSIDs.SSIDList)
{
//err msg
smsLog(pMac, LOGE, FL("Couldn't allocate memory for the SSID..Freeing memory allocated for Channel List\n"));
return eHAL_STATUS_FAILURE;
}
vos_mem_zero(scanReq.SSIDs.SSIDList, sizeof(tCsrSSIDInfo) * scanReq.SSIDs.numOfSSIDs);
scanReq.SSIDs.SSIDList[0].handoffPermitted = eANI_BOOLEAN_TRUE;
scanReq.SSIDs.SSIDList[0].ssidHidden = eANI_BOOLEAN_TRUE;
vos_mem_copy((void *)&scanReq.SSIDs.SSIDList[0].SSID, (void *)&pBgScanParams->SSID, sizeof(pBgScanParams->SSID));
scanReq.ChannelInfo.numOfChannels = pBgScanParams->ChannelInfo.numOfChannels;
channel = pBgScanParams->ChannelInfo.ChannelList[0];
scanReq.ChannelInfo.ChannelList = &channel;
scanReq.BSSType = eCSR_BSS_TYPE_INFRASTRUCTURE;
scanReq.scanType = eSIR_ACTIVE_SCAN;
scanReq.requestType = eCSR_SCAN_HO_BG_SCAN;
scanReq.maxChnTime = pBgScanParams->maxChnTime;
scanReq.minChnTime = pBgScanParams->minChnTime;
status = csrScanRequest(pMac, CSR_SESSION_ID_INVALID, &scanReq,
&scanId, csrNeighborRoamScanRequestCallback, NULL);
if (eHAL_STATUS_SUCCESS != status)
{
smsLog(pMac, LOGE, FL("CSR Scan Request failed with status %d"), status);
vos_mem_free(scanReq.SSIDs.SSIDList);
return status;
}
pMac->roam.neighborRoamInfo.scanRspPending = eANI_BOOLEAN_TRUE;
vos_mem_free(scanReq.SSIDs.SSIDList);
NEIGHBOR_ROAM_DEBUG(pMac, LOG1, FL("Channel List Address = %08x, Actual index = %d"),
&pMac->roam.neighborRoamInfo.roamChannelInfo.currentChannelListInfo.ChannelList[0],
pMac->roam.neighborRoamInfo.roamChannelInfo.currentChanIndex);
return status;
}
/* ---------------------------------------------------------------------------
\fn csrNeighborRoamPerformBgScan
\brief This function is invoked on every expiry of neighborScanTimer till all
the channels in the channel list are scanned. It populates necessary
parameters for BG scan and calls appropriate AP to invoke the CSR scan
request
\param pMac - The handle returned by macOpen.
\return eHAL_STATUS_SUCCESS on success, corresponding error code otherwise
---------------------------------------------------------------------------*/
eHalStatus csrNeighborRoamPerformBgScan(tpAniSirGlobal pMac)
{
eHalStatus status = eHAL_STATUS_SUCCESS;
tpCsrNeighborRoamControlInfo pNeighborRoamInfo = &pMac->roam.neighborRoamInfo;
tCsrBGScanRequest bgScanParams;
tANI_U8 broadcastBssid[] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
tANI_U8 channel = 0;
if (pNeighborRoamInfo->roamChannelInfo.currentChannelListInfo.ChannelList)
{
NEIGHBOR_ROAM_DEBUG(pMac, LOG1, FL("Channel List Address = %08x"), &pNeighborRoamInfo->roamChannelInfo.currentChannelListInfo.ChannelList[0]);
}
else
{
NEIGHBOR_ROAM_DEBUG(pMac, LOGE, FL("Channel List Empty"));
// Go back and restart. Mostly timer start failure has occured.
// When timer start is declared a failure, then we delete the list.
// Should not happen now as we stop and then only start the scan timer.
// still handle the unlikely case.
csrNeighborRoamHandleEmptyScanResult(pMac);
return status;
}
/* Need to perform scan here before getting the list */
vos_mem_copy(bgScanParams.bssid, broadcastBssid, sizeof(tCsrBssid));
bgScanParams.SSID.length = pMac->roam.roamSession[pNeighborRoamInfo->csrSessionId].connectedProfile.SSID.length;
vos_mem_copy(bgScanParams.SSID.ssId, pMac->roam.roamSession[pNeighborRoamInfo->csrSessionId].connectedProfile.SSID.ssId,
pMac->roam.roamSession[pNeighborRoamInfo->csrSessionId].connectedProfile.SSID.length);
channel = pNeighborRoamInfo->roamChannelInfo.currentChannelListInfo.ChannelList[pNeighborRoamInfo->roamChannelInfo.currentChanIndex];
bgScanParams.ChannelInfo.numOfChannels = 1;
bgScanParams.ChannelInfo.ChannelList = &channel;
bgScanParams.minChnTime = pNeighborRoamInfo->cfgParams.minChannelScanTime;
bgScanParams.maxChnTime = pNeighborRoamInfo->cfgParams.maxChannelScanTime;
status = csrNeighborRoamIssueBgScanRequest(pMac, &bgScanParams);
if (eHAL_STATUS_SUCCESS != status)
{
smsLog(pMac, LOGE, FL("Issue of BG Scan request failed: Status = %d"), status);
return status;
}
pNeighborRoamInfo->roamChannelInfo.currentChanIndex++;
if (pNeighborRoamInfo->roamChannelInfo.currentChanIndex >=
pNeighborRoamInfo->roamChannelInfo.currentChannelListInfo.numOfChannels)
{
NEIGHBOR_ROAM_DEBUG(pMac, LOG1, FL("Completed scanning channels in Channel List: CurrChanIndex = %d, Num Channels = %d"),
pNeighborRoamInfo->roamChannelInfo.currentChanIndex,
pNeighborRoamInfo->roamChannelInfo.currentChannelListInfo.numOfChannels);
/* We have completed scanning all the channels */
pNeighborRoamInfo->roamChannelInfo.currentChanIndex = 0;
/* We are no longer scanning the channel list. Next timer firing should be used to get the scan results
and select the best AP in the list */
if (eANI_BOOLEAN_TRUE == pNeighborRoamInfo->roamChannelInfo.chanListScanInProgress)
{
pNeighborRoamInfo->roamChannelInfo.chanListScanInProgress = eANI_BOOLEAN_FALSE;
}
}
return status;
}
/* ---------------------------------------------------------------------------
\fn csrNeighborRoamNeighborScanTimerCallback
\brief This function is the neighbor scan timer callback function. It invokes
the BG scan request based on the current and previous states
\param pv - CSR timer context info which includes pMac and session ID
\return VOID
---------------------------------------------------------------------------*/
void csrNeighborRoamNeighborScanTimerCallback(void *pv)
{
tCsrTimerInfo *pInfo = (tCsrTimerInfo *)pv;
tpAniSirGlobal pMac = pInfo->pMac;
tANI_U32 sessionId = pInfo->sessionId;
tpCsrNeighborRoamControlInfo pNeighborRoamInfo = &pMac->roam.neighborRoamInfo;
// check if bg scan is on going, no need to send down the new params if true
if(eANI_BOOLEAN_TRUE == pNeighborRoamInfo->scanRspPending)
{
//msg
smsLog(pMac, LOGW, FL("Already BgScanRsp is Pending\n"));
return;
}
VOS_ASSERT(sessionId == pNeighborRoamInfo->csrSessionId);
switch (pNeighborRoamInfo->neighborRoamState)
{
#ifdef WLAN_FEATURE_VOWIFI_11R
case eCSR_NEIGHBOR_ROAM_STATE_REPORT_SCAN:
switch(pNeighborRoamInfo->prevNeighborRoamState)
{
case eCSR_NEIGHBOR_ROAM_STATE_REPORT_QUERY:
csrNeighborRoamPerformBgScan(pMac);
break;
default:
smsLog(pMac, LOGE, FL("Neighbor scan callback received in state %d, prev state = %d"),
pNeighborRoamInfo->neighborRoamState, pNeighborRoamInfo->prevNeighborRoamState);
break;
}
break;
#endif /* WLAN_FEATURE_VOWIFI_11R */
case eCSR_NEIGHBOR_ROAM_STATE_CFG_CHAN_LIST_SCAN:
csrNeighborRoamPerformBgScan(pMac);
break;
default:
break;
}
return;
}
/* ---------------------------------------------------------------------------
\fn csrNeighborRoamResultsRefreshTimerCallback
\brief This function is the timer callback function for results refresh timer.
When this is invoked, it is as good as down event received from TL. So,
clear off the roamable AP list and start the scan procedure based on 11R
or non-11R association
\param context - CSR timer context info which includes pMac and session ID
\return VOID
---------------------------------------------------------------------------*/
void csrNeighborRoamResultsRefreshTimerCallback(void *context)
{
tCsrTimerInfo *pInfo = (tCsrTimerInfo *)context;
tpAniSirGlobal pMac = pInfo->pMac;
VOS_STATUS vosStatus = VOS_STATUS_SUCCESS;
tpCsrNeighborRoamControlInfo pNeighborRoamInfo = &pMac->roam.neighborRoamInfo;
NEIGHBOR_ROAM_DEBUG(pMac, LOG2, FL("Deregistering DOWN event reassoc callback with TL. RSSI = %d"), pNeighborRoamInfo->cfgParams.neighborReassocThreshold * (-1));
/* Deregister reassoc callback. Ignore return status */
vosStatus = WLANTL_DeregRSSIIndicationCB(pMac->roam.gVosContext, (v_S7_t)pNeighborRoamInfo->cfgParams.neighborReassocThreshold * (-1),
WLANTL_HO_THRESHOLD_DOWN,
csrNeighborRoamReassocIndCallback,
VOS_MODULE_ID_SME);
if(!VOS_IS_STATUS_SUCCESS(vosStatus))
{
//err msg
smsLog(pMac, LOGW, FL(" Couldn't deregister csrNeighborRoamReassocIndCallback with TL: Status = %d\n"), vosStatus);
}
/* Reset all the variables just as no scan had happened before */
csrNeighborRoamResetConnectedStateControlInfo(pMac);
#if defined WLAN_FEATURE_VOWIFI_11R && defined WLAN_FEATURE_VOWIFI
if ((pNeighborRoamInfo->is11rAssoc) && (pMac->rrm.rrmSmeContext.rrmConfig.rrmEnabled))
{
NEIGHBOR_ROAM_DEBUG(pMac, LOGE, FL("11R Association:Neighbor Lookup Down event received in CONNECTED state"));
vosStatus = csrNeighborRoamIssueNeighborRptRequest(pMac);
if (VOS_STATUS_SUCCESS != vosStatus)
{
smsLog(pMac, LOGE, FL("Neighbor report request failed. status = %d\n"), vosStatus);
return;
}
/* Increment the neighbor report retry count after sending the neighbor request successfully */
pNeighborRoamInfo->FTRoamInfo.currentNeighborRptRetryNum++;
pNeighborRoamInfo->FTRoamInfo.neighborRptPending = eANI_BOOLEAN_TRUE;
CSR_NEIGHBOR_ROAM_STATE_TRANSITION(eCSR_NEIGHBOR_ROAM_STATE_REPORT_QUERY)
}
else
#endif
{
NEIGHBOR_ROAM_DEBUG(pMac, LOGE, FL("Non 11R or CCX Association:Neighbor Lookup Down event received in CONNECTED state"));
vosStatus = csrNeighborRoamTransitToCFGChanScan(pMac);
if (VOS_STATUS_SUCCESS != vosStatus)
{
return;
}
}
return;
}
#if defined WLAN_FEATURE_VOWIFI_11R && defined WLAN_FEATURE_VOWIFI
/* ---------------------------------------------------------------------------
\fn csrNeighborRoamIssueNeighborRptRequest
\brief This function is invoked when TL issues a down event and the current assoc
is a 11R association. It invokes SME RRM API to issue the neighbor request to
the currently associated AP with the current SSID
\param pMac - The handle returned by macOpen.
\return VOS_STATUS_SUCCESS on success, corresponding error code otherwise
---------------------------------------------------------------------------*/
VOS_STATUS csrNeighborRoamIssueNeighborRptRequest(tpAniSirGlobal pMac)
{
tRrmNeighborRspCallbackInfo callbackInfo;
tpCsrNeighborRoamControlInfo pNeighborRoamInfo = &pMac->roam.neighborRoamInfo;
tRrmNeighborReq neighborReq;
neighborReq.no_ssid = 0;
/* Fill in the SSID */
neighborReq.ssid.length = pMac->roam.roamSession[pNeighborRoamInfo->csrSessionId].connectedProfile.SSID.length;
vos_mem_copy(neighborReq.ssid.ssId, pMac->roam.roamSession[pNeighborRoamInfo->csrSessionId].connectedProfile.SSID.ssId,
pMac->roam.roamSession[pNeighborRoamInfo->csrSessionId].connectedProfile.SSID.length);
callbackInfo.neighborRspCallback = csrNeighborRoamRRMNeighborReportResult;
callbackInfo.neighborRspCallbackContext = pMac;
callbackInfo.timeout = pNeighborRoamInfo->FTRoamInfo.neighborReportTimeout;
return sme_NeighborReportRequest(pMac,(tANI_U8) pNeighborRoamInfo->csrSessionId, &neighborReq, &callbackInfo);
}
/* ---------------------------------------------------------------------------
\fn csrNeighborRoamMergeChannelLists
\brief This function is used to merge two channel list.
NB: If called with outputNumOfChannels == 0, this routines
simply copies the input channel list to the output channel list.
\param pMac - The handle returned by macOpen.
\param pInputChannelList - The addtional channels to merge in to the "merged" channels list.
\param inputNumOfChannels - The number of additional channels.
\param pOutputChannelList - The place to put the "merged" channel list.
\param outputNumOfChannels - The original number of channels in the "merged" channels list.
\param pMergedOutputNumOfChannels - The final number of channels in the "merged" channel list.
\return VOS_STATUS_SUCCESS on success, corresponding error code otherwise
---------------------------------------------------------------------------*/
VOS_STATUS csrNeighborRoamMergeChannelLists(
tpAniSirGlobal pMac,
tANI_U8 *pInputChannelList,
int inputNumOfChannels,
tANI_U8 *pOutputChannelList,
int outputNumOfChannels,
int *pMergedOutputNumOfChannels
)
{
int i = 0;
int j = 0;
int numChannels = outputNumOfChannels;
// Check for NULL pointer
if (!pInputChannelList) return eHAL_STATUS_E_NULL_VALUE;
// Check for NULL pointer
if (!pOutputChannelList) return eHAL_STATUS_E_NULL_VALUE;
// Add the "new" channels in the input list to the end of the output list.
for (i = 0; i < inputNumOfChannels; i++)
{
for (j = 0; j < outputNumOfChannels; j++)
{
if (pInputChannelList[i] == pOutputChannelList[j])
break;
}
if (j == outputNumOfChannels)
{
if (pInputChannelList[i])
{
VOS_TRACE (VOS_MODULE_ID_SME, VOS_TRACE_LEVEL_ERROR,
"%s: [INFOLOG] Adding extra %d to Neighbor channel list\n", __func__,
pInputChannelList[i]);
pOutputChannelList[numChannels] = pInputChannelList[i];
numChannels++;
}
}
}
// Return final number of channels
*pMergedOutputNumOfChannels = numChannels;
return eHAL_STATUS_SUCCESS;
}
/* ---------------------------------------------------------------------------
\fn csrNeighborRoamCreateChanListFromNeighborReport
\brief This function is invoked when neighbor report is received for the
neighbor request. Based on the channels present in the neighbor report,
it generates channel list which will be used in REPORT_SCAN state to
scan for these neighbor APs
\param pMac - The handle returned by macOpen.
\return VOS_STATUS_SUCCESS on success, corresponding error code otherwise
---------------------------------------------------------------------------*/
VOS_STATUS csrNeighborRoamCreateChanListFromNeighborReport(tpAniSirGlobal pMac)
{
tpRrmNeighborReportDesc pNeighborBssDesc;
tpCsrNeighborRoamControlInfo pNeighborRoamInfo = &pMac->roam.neighborRoamInfo;
tANI_U8 numChannels = 0, i = 0;
tANI_U8 channelList[MAX_BSS_IN_NEIGHBOR_RPT];
#if 0
eHalStatus status = eHAL_STATUS_SUCCESS;
#endif
/* This should always start from 0 whenever we create a channel list out of neighbor AP list */
pNeighborRoamInfo->FTRoamInfo.numBssFromNeighborReport = 0;
pNeighborBssDesc = smeRrmGetFirstBssEntryFromNeighborCache(pMac);
while (pNeighborBssDesc)
{
if (pNeighborRoamInfo->FTRoamInfo.numBssFromNeighborReport >= MAX_BSS_IN_NEIGHBOR_RPT) break;
/* Update the neighbor BSS Info in the 11r FT Roam Info */
pNeighborRoamInfo->FTRoamInfo.neighboReportBssInfo[pNeighborRoamInfo->FTRoamInfo.numBssFromNeighborReport].channelNum =
pNeighborBssDesc->pNeighborBssDescription->channel;
pNeighborRoamInfo->FTRoamInfo.neighboReportBssInfo[pNeighborRoamInfo->FTRoamInfo.numBssFromNeighborReport].neighborScore =
(tANI_U8)pNeighborBssDesc->roamScore;
vos_mem_copy(pNeighborRoamInfo->FTRoamInfo.neighboReportBssInfo[pNeighborRoamInfo->FTRoamInfo.numBssFromNeighborReport].neighborBssId,
pNeighborBssDesc->pNeighborBssDescription->bssId, sizeof(tSirMacAddr));
pNeighborRoamInfo->FTRoamInfo.numBssFromNeighborReport++;
/* Saving the channel list non-redundantly */
if (numChannels > 0)
{
for (i = 0; i < numChannels; i++)
{
if (pNeighborBssDesc->pNeighborBssDescription->channel == channelList[i])
break;
}
}
if (i == numChannels)
{
if (pNeighborBssDesc->pNeighborBssDescription->channel)
{
VOS_TRACE (VOS_MODULE_ID_SME, VOS_TRACE_LEVEL_INFO,
"%s: [INFOLOG] Adding %d to Neighbor channel list\n", __func__,
pNeighborBssDesc->pNeighborBssDescription->channel);
channelList[numChannels] = pNeighborBssDesc->pNeighborBssDescription->channel;
numChannels++;
}
}
pNeighborBssDesc = smeRrmGetNextBssEntryFromNeighborCache(pMac, pNeighborBssDesc);
}
if (pNeighborRoamInfo->roamChannelInfo.currentChannelListInfo.ChannelList)
{
#if 0
// Before we free the existing channel list for a safety net make sure
// we have a union of the IAPP and the already existing list.
status = csrNeighborRoamMergeChannelLists(
pMac,
pNeighborRoamInfo->roamChannelInfo.currentChannelListInfo.ChannelList,
pNeighborRoamInfo->roamChannelInfo.currentChannelListInfo.numOfChannels,
channelList,
numChannels,
&numChannels );
#endif
vos_mem_free(pNeighborRoamInfo->roamChannelInfo.currentChannelListInfo.ChannelList);
}
pNeighborRoamInfo->roamChannelInfo.currentChannelListInfo.ChannelList = NULL;
/* Store the obtained channel list to the Neighbor Control data structure */
if (numChannels)
pNeighborRoamInfo->roamChannelInfo.currentChannelListInfo.ChannelList = vos_mem_malloc((numChannels) * sizeof(tANI_U8));
if (NULL == pNeighborRoamInfo->roamChannelInfo.currentChannelListInfo.ChannelList)
{
smsLog(pMac, LOGE, FL("Memory allocation for Channel list failed.. TL event ignored"));
return VOS_STATUS_E_RESOURCES;
}
vos_mem_copy(pNeighborRoamInfo->roamChannelInfo.currentChannelListInfo.ChannelList,
channelList, (numChannels) * sizeof(tANI_U8));
pNeighborRoamInfo->roamChannelInfo.currentChannelListInfo.numOfChannels = numChannels;
if (numChannels)
{
smsLog(pMac, LOG1, FL("IAPP Neighbor list callback received as expected in state %d."),
pNeighborRoamInfo->neighborRoamState);
pNeighborRoamInfo->roamChannelInfo.IAPPNeighborListReceived = eANI_BOOLEAN_TRUE;
}
pNeighborRoamInfo->roamChannelInfo.currentChanIndex = 0;
pNeighborRoamInfo->roamChannelInfo.chanListScanInProgress = eANI_BOOLEAN_TRUE;
return VOS_STATUS_SUCCESS;
}
/* ---------------------------------------------------------------------------
\fn csrNeighborRoamRRMNeighborReportResult
\brief This function is the neighbor report callback that will be invoked by
SME RRM on receiving a neighbor report or of neighbor report is not
received after timeout. On receiving a valid report, it generates a
channel list from the neighbor report and starts the
neighbor scan timer
\param context - The handle returned by macOpen.
vosStatus - Status of the callback(SUCCESS/FAILURE)
\return VOID
---------------------------------------------------------------------------*/
void csrNeighborRoamRRMNeighborReportResult(void *context, VOS_STATUS vosStatus)
{
tpAniSirGlobal pMac = PMAC_STRUCT(context);
tpCsrNeighborRoamControlInfo pNeighborRoamInfo = &pMac->roam.neighborRoamInfo;
eHalStatus status = eHAL_STATUS_SUCCESS;
smsLog(pMac, LOG1, FL("Neighbor report result callback with status = %d\n"), vosStatus);
switch (pNeighborRoamInfo->neighborRoamState)
{
case eCSR_NEIGHBOR_ROAM_STATE_REPORT_QUERY:
/* Reset the report pending variable */
pNeighborRoamInfo->FTRoamInfo.neighborRptPending = eANI_BOOLEAN_FALSE;
if (VOS_STATUS_SUCCESS == vosStatus)
{
/* Need to create channel list based on the neighbor AP list and transition to REPORT_SCAN state */
vosStatus = csrNeighborRoamCreateChanListFromNeighborReport(pMac);
if (VOS_STATUS_SUCCESS == vosStatus)
{
NEIGHBOR_ROAM_DEBUG(pMac, LOGE, FL("Channel List created from Neighbor report, Transitioning to NEIGHBOR_SCAN state\n"));
}
/* We are gonna scan now. Remember the time stamp to filter out results only after this timestamp */
pNeighborRoamInfo->scanRequestTimeStamp = (tANI_TIMESTAMP)palGetTickCount(pMac->hHdd);
/* Now ready for neighbor scan based on the channel list created */
/* Start Neighbor scan timer now. Multiplication by PAL_TIMER_TO_MS_UNIT is to convert ms to us which is
what palTimerStart expects */
status = palTimerStart(pMac->hHdd, pNeighborRoamInfo->neighborScanTimer,
pNeighborRoamInfo->cfgParams.neighborScanPeriod * PAL_TIMER_TO_MS_UNIT,
eANI_BOOLEAN_FALSE);
if (eHAL_STATUS_SUCCESS != status)
{
/* Timer start failed.. Should we ASSERT here??? */
smsLog(pMac, LOGE, FL("PAL Timer start for neighbor scan timer failed, status = %d, Ignoring state transition"), status);
vos_mem_free(pNeighborRoamInfo->roamChannelInfo.currentChannelListInfo.ChannelList);
pNeighborRoamInfo->roamChannelInfo.currentChannelListInfo.ChannelList = NULL;
return;
}
pNeighborRoamInfo->FTRoamInfo.currentNeighborRptRetryNum = 0;
/* Neighbor scan timer started. Transition to REPORT_SCAN state */
CSR_NEIGHBOR_ROAM_STATE_TRANSITION(eCSR_NEIGHBOR_ROAM_STATE_REPORT_SCAN)
}
else
{
/* Neighbor report timeout happened in SME RRM. We can try sending more neighbor requests until we
reach the maxNeighborRetries or receiving a successful neighbor response */
smsLog(pMac, LOGE, FL("Neighbor report result failed after %d retries, MAX RETRIES = %d\n"),
pNeighborRoamInfo->FTRoamInfo.currentNeighborRptRetryNum, pNeighborRoamInfo->cfgParams.maxNeighborRetries);
if (pNeighborRoamInfo->FTRoamInfo.currentNeighborRptRetryNum >=
pNeighborRoamInfo->cfgParams.maxNeighborRetries)
{
smsLog(pMac, LOGE, FL("Bailing out to CFG Channel list scan.. \n"));
vosStatus = csrNeighborRoamTransitToCFGChanScan(pMac);
if (VOS_STATUS_SUCCESS != vosStatus)
{
smsLog(pMac, LOGE, FL("Transit to CFG Channel list scan state failed with status %d \n"), vosStatus);
return;
}
/* We transitioned to different state now. Reset the Neighbor report retry count */
pNeighborRoamInfo->FTRoamInfo.currentNeighborRptRetryNum = 0;
}
else
{
vosStatus = csrNeighborRoamIssueNeighborRptRequest(pMac);
if (VOS_STATUS_SUCCESS != vosStatus)
{
smsLog(pMac, LOGE, FL("Neighbor report request failed. status = %d\n"), vosStatus);
return;
}
pNeighborRoamInfo->FTRoamInfo.neighborRptPending = eANI_BOOLEAN_TRUE;
/* Increment the neighbor report retry count after sending the neighbor request successfully */
pNeighborRoamInfo->FTRoamInfo.currentNeighborRptRetryNum++;
}
}
break;
default:
smsLog(pMac, LOGE, FL("Neighbor result callback not expected in state %d, Ignoring.."), pNeighborRoamInfo->neighborRoamState);
break;
}
return;
}
#endif /* WLAN_FEATURE_VOWIFI_11R */
#ifdef FEATURE_WLAN_LFR
tANI_BOOLEAN csrNeighborRoamIsSsidAndSecurityMatch(
tpAniSirGlobal pMac,
tCsrRoamConnectedProfile *pCurProfile,
tSirBssDescription *pBssDesc,
tDot11fBeaconIEs *pIes)
{
tCsrAuthList authType;
tCsrEncryptionList uCEncryptionType;
tCsrEncryptionList mCEncryptionType;
tANI_BOOLEAN fMatch = FALSE;
authType.numEntries = 1;
authType.authType[0] = pCurProfile->AuthType;
uCEncryptionType.numEntries = 1;
uCEncryptionType.encryptionType[0] = pCurProfile->EncryptionType;
mCEncryptionType.numEntries = 1;
mCEncryptionType.encryptionType[0] = pCurProfile->mcEncryptionType;
if( pIes )
{
if(pIes->SSID.present)
{
fMatch = csrIsSsidMatch( pMac,
(void *)pCurProfile->SSID.ssId, pCurProfile->SSID.length,
pIes->SSID.ssid, pIes->SSID.num_ssid,
eANI_BOOLEAN_TRUE );
if(TRUE == fMatch)
{
fMatch = csrIsSecurityMatch( pMac, &authType, &uCEncryptionType,
&mCEncryptionType, pBssDesc, pIes, NULL, NULL, NULL );
return (fMatch);
}
else
{
return (fMatch);
}
}
else
{
return FALSE; // Treat a missing SSID as a non-match.
}
}
else
{
return FALSE; // Again, treat missing pIes as a non-match.
}
}
tANI_BOOLEAN csrNeighborRoamIsNewConnectedProfile(
tpAniSirGlobal pMac)
{
tpCsrNeighborRoamControlInfo pNeighborRoamInfo = &pMac->roam.neighborRoamInfo;
tANI_U8 sessionId = (tANI_U8)pNeighborRoamInfo->csrSessionId;
tCsrRoamConnectedProfile *pCurrProfile = NULL;
tCsrRoamConnectedProfile *pPrevProfile = NULL;
tDot11fBeaconIEs *pIes = NULL;
tSirBssDescription *pBssDesc = NULL;
tANI_BOOLEAN fNew = TRUE;
if(!(pMac->roam.roamSession && CSR_IS_SESSION_VALID(pMac, sessionId)))
{
return (fNew);
}
pCurrProfile = &pMac->roam.roamSession[sessionId].connectedProfile;
if( !pCurrProfile )
{
return (fNew);
}
pPrevProfile = &pNeighborRoamInfo->prevConnProfile;
if( !pPrevProfile )
{
return (fNew);
}
pBssDesc = pPrevProfile->pBssDesc;
if (pBssDesc)
{
if (HAL_STATUS_SUCCESS(csrGetParsedBssDescriptionIEs(pMac,
pBssDesc, &pIes)) &&
csrNeighborRoamIsSsidAndSecurityMatch(pMac, pCurrProfile, pBssDesc, pIes))
{
fNew = FALSE;
}
if (pIes) {
palFreeMemory(pMac->hHdd, pIes);
}
}
if (fNew)
{
smsLog(pMac, LOG1, FL("Prev roam profile did not match current"));
csrRoamFreeConnectProfile(pMac, pPrevProfile);
csrRoamGetConnectProfile(pMac, sessionId, pPrevProfile);
}
else
{
smsLog(pMac, LOG1, FL("Prev roam profile matches current"));
}
return (fNew);
}
tANI_BOOLEAN csrNeighborRoamConnectedProfileMatch(
tpAniSirGlobal pMac,
tCsrScanResult *pResult,
tDot11fBeaconIEs *pIes)
{
tpCsrNeighborRoamControlInfo pNeighborRoamInfo = &pMac->roam.neighborRoamInfo;
tANI_U8 sessionId = (tANI_U8)pNeighborRoamInfo->csrSessionId;
tCsrRoamConnectedProfile *pCurProfile = NULL;
tSirBssDescription *pBssDesc = &pResult->Result.BssDescriptor;
if( !(pMac->roam.roamSession
&& CSR_IS_SESSION_VALID(pMac, sessionId)))
{
return FALSE;
}
pCurProfile = &pMac->roam.roamSession[sessionId].connectedProfile;
if( !pCurProfile)
{
return FALSE;
}
return csrNeighborRoamIsSsidAndSecurityMatch(pMac, pCurProfile, pBssDesc, pIes);
}
/* ---------------------------------------------------------------------------
\fn csrNeighborRoamPrepareNonOccupiedChannelList
\brief This function is used to prepare a channel list that is derived from
the list of valid channels and does not include those in the occupied
list.
\param pMac - The handle returned by macOpen.
\param pInputChannelList - The default channels list.
\param numOfChannels - The number of channels in the default channels list.
\param pOutputChannelList - The place to put the non-occupied channel list.
\param pOutputNumOfChannels - The number of channels in the non-occupied channel list.
\return VOS_STATUS_SUCCESS on success, corresponding error code otherwise
---------------------------------------------------------------------------*/
VOS_STATUS csrNeighborRoamPrepareNonOccupiedChannelList(
tpAniSirGlobal pMac,
tANI_U8 *pInputChannelList,
int numOfChannels,
tANI_U8 *pOutputChannelList,
int *pOutputNumOfChannels
)
{
int i = 0;
int outputNumOfChannels = 0; // Clear the output number of channels
tANI_U8 numOccupiedChannels = pMac->scan.occupiedChannels.numChannels;
tANI_U8 *pOccupiedChannelList = pMac->scan.occupiedChannels.channelList;
for (i = 0; i < numOfChannels; i++)
{
if (!csrIsChannelPresentInList(pOccupiedChannelList, numOccupiedChannels,
pInputChannelList[i]))
{
pOutputChannelList[outputNumOfChannels++] = pInputChannelList[i];
}
}
smsLog(pMac, LOG2, FL("Number of channels in the valid channel list=%d; "
"Number of channels in the non-occupied list list=%d"),
numOfChannels, outputNumOfChannels);
// Return the number of channels
*pOutputNumOfChannels = outputNumOfChannels;
return eHAL_STATUS_SUCCESS;
}
#endif /* FEATURE_WLAN_LFR */
/* ---------------------------------------------------------------------------
\fn csrNeighborRoamTransitToCFGChanScan
\brief This function is called whenever there is a transition to CFG chan scan
state from any state. It frees up the current channel list and allocates
a new memory for the channels received from CFG item. It then starts the
neighbor scan timer to perform the scan on each channel one by one
\param pMac - The handle returned by macOpen.
\return VOS_STATUS_SUCCESS on success, corresponding error code otherwise
---------------------------------------------------------------------------*/
VOS_STATUS csrNeighborRoamTransitToCFGChanScan(tpAniSirGlobal pMac)
{
tpCsrNeighborRoamControlInfo pNeighborRoamInfo = &pMac->roam.neighborRoamInfo;
eHalStatus status = eHAL_STATUS_SUCCESS;
int i = 0;
int numOfChannels = 0;
tANI_U8 channelList[WNI_CFG_VALID_CHANNEL_LIST_LEN];
tpCsrChannelInfo currChannelListInfo;
currChannelListInfo = &pNeighborRoamInfo->roamChannelInfo.currentChannelListInfo;
if (
#ifdef FEATURE_WLAN_CCX
((pNeighborRoamInfo->isCCXAssoc) &&
(pNeighborRoamInfo->roamChannelInfo.IAPPNeighborListReceived == eANI_BOOLEAN_FALSE)) ||
(pNeighborRoamInfo->isCCXAssoc == eANI_BOOLEAN_FALSE) ||
#endif // CCX
currChannelListInfo->numOfChannels == 0)
{
smsLog(pMac, LOGW, FL("Building channel list to scan"));
/* Free up the channel list and allocate a new memory. This is because we dont know how much
was allocated last time. If we directly copy more number of bytes than allocated earlier, this might
result in memory corruption */
if (NULL != currChannelListInfo->ChannelList)
{
vos_mem_free(currChannelListInfo->ChannelList);
currChannelListInfo->ChannelList = NULL;
}
// Now obtain the contents for "channelList" (the "default valid channel list") from EITHER
// the gNeighborScanChannelList in "cfg.ini", OR the actual "valid channel list" information formed by CSR.
if (0 != pNeighborRoamInfo->cfgParams.channelInfo.numOfChannels)
{
// Copy the "default valid channel list" (channelList) from the gNeighborScanChannelList in "cfg.ini".
NEIGHBOR_ROAM_DEBUG(pMac, LOGE, "Using the channel list from cfg.ini");
status = csrNeighborRoamMergeChannelLists(
pMac,
pNeighborRoamInfo->cfgParams.channelInfo.ChannelList,
pNeighborRoamInfo->cfgParams.channelInfo.numOfChannels,
channelList,
0, //NB: If 0, simply copy the input channel list to the output list.
&numOfChannels );
currChannelListInfo->ChannelList =
vos_mem_malloc(numOfChannels*sizeof(tANI_U8));
if (NULL == currChannelListInfo->ChannelList)
{
smsLog(pMac, LOGE, FL("Memory allocation for Channel list failed"));
return VOS_STATUS_E_RESOURCES;
}
vos_mem_copy(currChannelListInfo->ChannelList,
channelList, numOfChannels * sizeof(tANI_U8));
}
else
{
/* Get current list of valid channels. */
numOfChannels = pMac->scan.occupiedChannels.numChannels;
if (numOfChannels
#ifdef FEATURE_WLAN_LFR
&& ((pNeighborRoamInfo->uEmptyScanCount == 0) ||
((pNeighborRoamInfo->uEmptyScanCount % 2) == 1))
#endif
)
{
/*
* Always scan channels in the occupied channel list
* before scanning on the non-occupied list.
*/
NEIGHBOR_ROAM_DEBUG(pMac, LOG1, "Switching to occupied channel list");
VOS_ASSERT(currChannelListInfo->ChannelList == NULL);
currChannelListInfo->ChannelList = vos_mem_malloc(numOfChannels);
if (NULL == currChannelListInfo->ChannelList)
{
smsLog(pMac, LOGE, FL("Memory allocation for Channel list failed"));
return VOS_STATUS_E_RESOURCES;
}
vos_mem_copy(currChannelListInfo->ChannelList,
pMac->scan.occupiedChannels.channelList,
numOfChannels * sizeof(tANI_U8));
}
else
{
/* Scan all channels from non-occupied list */
NEIGHBOR_ROAM_DEBUG(pMac, LOG2, "Get valid channel list");
numOfChannels = sizeof(pMac->roam.validChannelList);
if(HAL_STATUS_SUCCESS(csrGetCfgValidChannels(pMac,
(tANI_U8 *)pMac->roam.validChannelList,
(tANI_U32 *) &numOfChannels)))
{
#ifdef FEATURE_WLAN_LFR
/*
* Prepare non-occupied channel list (channelList)
* from the actual "valid channel list" information
* formed by CSR.
*/
NEIGHBOR_ROAM_DEBUG(pMac, LOG1, "Switching to non-occupied channel list");
status = csrNeighborRoamPrepareNonOccupiedChannelList(pMac,
(tANI_U8 *)pMac->roam.validChannelList,
numOfChannels,
channelList,
&numOfChannels);
#else
NEIGHBOR_ROAM_DEBUG(pMac, LOG2, "Merging channel list");
status = csrNeighborRoamMergeChannelLists(
pMac,
(tANI_U8 *)pMac->roam.validChannelList,
numOfChannels, // The number of channels in the validChannelList
channelList,
0, //NB: If 0, simply copy the input channel list to the output list.
&numOfChannels ); // The final number of channels in the output list. Will be numOfChannels
#endif
}
else
{
smsLog(pMac, LOGE, FL("Could not get valid channel list"));
return VOS_STATUS_E_FAILURE;
}
currChannelListInfo->ChannelList =
vos_mem_malloc(numOfChannels*sizeof(tANI_U8));
if (NULL == currChannelListInfo->ChannelList)
{
smsLog(pMac, LOGE, FL("Memory allocation for Channel list failed"));
return VOS_STATUS_E_RESOURCES;
}
#ifdef FEATURE_WLAN_LFR
vos_mem_copy(currChannelListInfo->ChannelList,
channelList, numOfChannels * sizeof(tANI_U8));
#else
vos_mem_copy(currChannelListInfo->ChannelList,
(tANI_U8 *)pMac->roam.validChannelList,
numOfChannels * sizeof(tANI_U8));
#endif
}
}
/* Adjust for the actual number that are used */
currChannelListInfo->numOfChannels = numOfChannels;
for (i = 0; i < currChannelListInfo->numOfChannels; i++)
{
NEIGHBOR_ROAM_DEBUG(pMac, LOGW, "Channel List from CFG (or) (non-)occupied list"
"= %d\n", currChannelListInfo->ChannelList[i]);
}
}
/* We are gonna scan now. Remember the time stamp to filter out results only after this timestamp */
pNeighborRoamInfo->scanRequestTimeStamp = (tANI_TIMESTAMP)palGetTickCount(pMac->hHdd);
palTimerStop(pMac->hHdd, pNeighborRoamInfo->neighborScanTimer);
/* Start Neighbor scan timer now. Multiplication by PAL_TIMER_TO_MS_UNIT is to convert ms to us which is
what palTimerStart expects */
status = palTimerStart(pMac->hHdd, pNeighborRoamInfo->neighborScanTimer,
pNeighborRoamInfo->cfgParams.neighborScanPeriod * PAL_TIMER_TO_MS_UNIT,
eANI_BOOLEAN_FALSE);
if (eHAL_STATUS_SUCCESS != status)
{
/* Timer start failed.. */
smsLog(pMac, LOGE, FL("Neighbor scan PAL Timer start failed, status = %d, Ignoring state transition"), status);
vos_mem_free(currChannelListInfo->ChannelList);
currChannelListInfo->ChannelList = NULL;
return VOS_STATUS_E_FAILURE;
}
pNeighborRoamInfo->roamChannelInfo.currentChanIndex = 0;
pNeighborRoamInfo->roamChannelInfo.chanListScanInProgress = eANI_BOOLEAN_TRUE;
/* We are about to start a fresh scan cycle,
* purge non-P2P results from the past */
csrScanFlushSelectiveResult(pMac, VOS_FALSE);
/* Transition to CFG_CHAN_LIST_SCAN_STATE */
CSR_NEIGHBOR_ROAM_STATE_TRANSITION(eCSR_NEIGHBOR_ROAM_STATE_CFG_CHAN_LIST_SCAN)
return VOS_STATUS_SUCCESS;
}
/* ---------------------------------------------------------------------------
\fn csrNeighborRoamNeighborLookupUpEvent
\brief This function is called as soon as TL indicates that the current AP's
RSSI is better than the neighbor lookup threshold. Here, we transition to
CONNECTED state and reset all the scan parameters
\param pMac - The handle returned by macOpen.
\return VOS_STATUS_SUCCESS on success, corresponding error code otherwise
---------------------------------------------------------------------------*/
VOS_STATUS csrNeighborRoamNeighborLookupUpEvent(tpAniSirGlobal pMac)
{
tpCsrNeighborRoamControlInfo pNeighborRoamInfo = &pMac->roam.neighborRoamInfo;
VOS_STATUS vosStatus;
csrNeighborRoamDeregAllRssiIndication(pMac);
/* Recheck whether the below check is needed. */
if (pNeighborRoamInfo->neighborRoamState != eCSR_NEIGHBOR_ROAM_STATE_CONNECTED)
CSR_NEIGHBOR_ROAM_STATE_TRANSITION(eCSR_NEIGHBOR_ROAM_STATE_CONNECTED)
/* Reset all the neighbor roam info control variables. Free all the allocated memory. It is like we are just associated now */
csrNeighborRoamResetConnectedStateControlInfo(pMac);
NEIGHBOR_ROAM_DEBUG(pMac, LOG2, FL("Registering DOWN event neighbor lookup callback with TL. RSSI = %d,"), pNeighborRoamInfo->currentNeighborLookupThreshold * (-1));
/* Register Neighbor Lookup threshold callback with TL for DOWN event now */
vosStatus = WLANTL_RegRSSIIndicationCB(pMac->roam.gVosContext, (v_S7_t)pNeighborRoamInfo->currentNeighborLookupThreshold * (-1),
WLANTL_HO_THRESHOLD_DOWN,
csrNeighborRoamNeighborLookupDOWNCallback,
VOS_MODULE_ID_SME, pMac);
if(!VOS_IS_STATUS_SUCCESS(vosStatus))
{
//err msg
smsLog(pMac, LOGW, FL(" Couldn't register csrNeighborRoamNeighborLookupCallback DOWN event with TL: Status = %d\n"), vosStatus);
}
return vosStatus;
}
/* ---------------------------------------------------------------------------
\fn csrNeighborRoamNeighborLookupDownEvent
\brief This function is called as soon as TL indicates that the current AP's
RSSI falls below the current eighbor lookup threshold. Here, we transition to
REPORT_QUERY for 11r association and CFG_CHAN_LIST_SCAN state if the assoc is
a non-11R association.
\param pMac - The handle returned by macOpen.
\return VOS_STATUS_SUCCESS on success, corresponding error code otherwise
---------------------------------------------------------------------------*/
VOS_STATUS csrNeighborRoamNeighborLookupDownEvent(tpAniSirGlobal pMac)
{
tpCsrNeighborRoamControlInfo pNeighborRoamInfo = &pMac->roam.neighborRoamInfo;
VOS_STATUS vosStatus = VOS_STATUS_SUCCESS;
eHalStatus status = eHAL_STATUS_SUCCESS;
switch (pNeighborRoamInfo->neighborRoamState)
{
case eCSR_NEIGHBOR_ROAM_STATE_CONNECTED:
NEIGHBOR_ROAM_DEBUG(pMac, LOG2, FL("Deregistering DOWN event neighbor lookup callback with TL. RSSI = %d,"),
pNeighborRoamInfo->currentNeighborLookupThreshold * (-1));
/* De-register Neighbor Lookup threshold callback with TL */
vosStatus = WLANTL_DeregRSSIIndicationCB(pMac->roam.gVosContext, (v_S7_t)pNeighborRoamInfo->currentNeighborLookupThreshold * (-1),
WLANTL_HO_THRESHOLD_DOWN,
csrNeighborRoamNeighborLookupDOWNCallback,
VOS_MODULE_ID_SME);
if(!VOS_IS_STATUS_SUCCESS(vosStatus))
{
//err msg
smsLog(pMac, LOGW, FL(" Couldn't Deregister csrNeighborRoamNeighborLookupCallback DOWN event from TL: Status = %d\n"), vosStatus);
}
#if defined WLAN_FEATURE_VOWIFI_11R && defined WLAN_FEATURE_VOWIFI
if ((pNeighborRoamInfo->is11rAssoc) && (pMac->rrm.rrmSmeContext.rrmConfig.rrmEnabled))
{
NEIGHBOR_ROAM_DEBUG(pMac, LOGE, FL("11R Association:Neighbor Lookup Down event received in CONNECTED state"));
vosStatus = csrNeighborRoamIssueNeighborRptRequest(pMac);
if (VOS_STATUS_SUCCESS != vosStatus)
{
smsLog(pMac, LOGE, FL("Neighbor report request failed. status = %d\n"), vosStatus);
return vosStatus;
}
/* Increment the neighbor report retry count after sending the neighbor request successfully */
pNeighborRoamInfo->FTRoamInfo.currentNeighborRptRetryNum++;
pNeighborRoamInfo->FTRoamInfo.neighborRptPending = eANI_BOOLEAN_TRUE;
CSR_NEIGHBOR_ROAM_STATE_TRANSITION(eCSR_NEIGHBOR_ROAM_STATE_REPORT_QUERY)
}
else
#endif
{
NEIGHBOR_ROAM_DEBUG(pMac, LOG2, FL("Non 11R or CCX Association:Neighbor Lookup Down event received in CONNECTED state"));
vosStatus = csrNeighborRoamTransitToCFGChanScan(pMac);
if (VOS_STATUS_SUCCESS != vosStatus)
{
NEIGHBOR_ROAM_DEBUG(pMac, LOGE, FL("csrNeighborRoamTransitToCFGChanScan failed"
" with status=%d"), vosStatus);
return vosStatus;
}
}
NEIGHBOR_ROAM_DEBUG(pMac, LOG2, FL("Registering UP event neighbor lookup callback with TL. RSSI = %d,"), NEIGHBOR_ROAM_LOOKUP_UP_THRESHOLD * (-1));
/* Register Neighbor Lookup threshold callback with TL for UP event now */
vosStatus = WLANTL_RegRSSIIndicationCB(pMac->roam.gVosContext,
(v_S7_t)NEIGHBOR_ROAM_LOOKUP_UP_THRESHOLD * (-1),
WLANTL_HO_THRESHOLD_UP,
csrNeighborRoamNeighborLookupUPCallback,
VOS_MODULE_ID_SME, pMac);
if(!VOS_IS_STATUS_SUCCESS(vosStatus))
{
//err msg
smsLog(pMac, LOGE, FL(" Couldn't register csrNeighborRoamNeighborLookupCallback UP event with TL: Status = %d\n"), status);
}
break;
default:
smsLog(pMac, LOGE, FL("DOWN event received in invalid state %d..Ignoring..."), pNeighborRoamInfo->neighborRoamState);
break;
}
return vosStatus;
}
/* ---------------------------------------------------------------------------
\fn csrNeighborRoamNeighborLookupUPCallback
\brief This function is registered with TL to indicate whenever the RSSI
gets better than the neighborLookup RSSI Threshold
\param pAdapter - VOS Context
trafficStatus - UP/DOWN indication from TL
pUserCtxt - Parameter for callback registered during callback registration. Should be pMac
\return VOS_STATUS_SUCCESS on success, corresponding error code otherwise
---------------------------------------------------------------------------*/
VOS_STATUS csrNeighborRoamNeighborLookupUPCallback (v_PVOID_t pAdapter, v_U8_t rssiNotification,
v_PVOID_t pUserCtxt)
{
tpAniSirGlobal pMac = PMAC_STRUCT( pUserCtxt );
tpCsrNeighborRoamControlInfo pNeighborRoamInfo = &pMac->roam.neighborRoamInfo;
VOS_STATUS vosStatus = eHAL_STATUS_SUCCESS;
NEIGHBOR_ROAM_DEBUG(pMac, LOGW, FL("Neighbor Lookup UP indication callback called with notification %d"), rssiNotification);
if(!csrIsConnStateConnectedInfra(pMac, pNeighborRoamInfo->csrSessionId))
{
smsLog(pMac, LOGW, "Ignoring the indication as we are not connected\n");
return VOS_STATUS_SUCCESS;
}
VOS_ASSERT(WLANTL_HO_THRESHOLD_UP == rssiNotification);
vosStatus = csrNeighborRoamNeighborLookupUpEvent(pMac);
return vosStatus;
}
/* ---------------------------------------------------------------------------
\fn csrNeighborRoamNeighborLookupDOWNCallback
\brief This function is registered with TL to indicate whenever the RSSI
falls below the current neighborLookup RSSI Threshold
\param pAdapter - VOS Context
trafficStatus - UP/DOWN indication from TL
pUserCtxt - Parameter for callback registered during callback registration. Should be pMac
\return VOS_STATUS_SUCCESS on success, corresponding error code otherwise
---------------------------------------------------------------------------*/
VOS_STATUS csrNeighborRoamNeighborLookupDOWNCallback (v_PVOID_t pAdapter, v_U8_t rssiNotification,
v_PVOID_t pUserCtxt)
{
tpAniSirGlobal pMac = PMAC_STRUCT( pUserCtxt );
tpCsrNeighborRoamControlInfo pNeighborRoamInfo = &pMac->roam.neighborRoamInfo;
VOS_STATUS vosStatus = eHAL_STATUS_SUCCESS;
NEIGHBOR_ROAM_DEBUG(pMac, LOGW, FL("Neighbor Lookup DOWN indication callback called with notification %d"), rssiNotification);
if(!csrIsConnStateConnectedInfra(pMac, pNeighborRoamInfo->csrSessionId))
{
smsLog(pMac, LOGW, "Ignoring the indication as we are not connected\n");
return VOS_STATUS_SUCCESS;
}
VOS_ASSERT(WLANTL_HO_THRESHOLD_DOWN == rssiNotification);
vosStatus = csrNeighborRoamNeighborLookupDownEvent(pMac);
return vosStatus;
}
#ifdef RSSI_HACK
extern int dumpCmdRSSI;
#endif
/* ---------------------------------------------------------------------------
\fn csrNeighborRoamIndicateDisconnect
\brief This function is called by CSR as soon as the station disconnects from
the AP. This function does the necessary cleanup of neighbor roam data
structures. Neighbor roam state transitions to INIT state whenever this
function is called except if the current state is REASSOCIATING
\param pMac - The handle returned by macOpen.
sessionId - CSR session id that got disconnected
\return eHAL_STATUS_SUCCESS on success, corresponding error code otherwise
---------------------------------------------------------------------------*/
eHalStatus csrNeighborRoamIndicateDisconnect(tpAniSirGlobal pMac, tANI_U8 sessionId)
{
tpCsrNeighborRoamControlInfo pNeighborRoamInfo = &pMac->roam.neighborRoamInfo;
smsLog(pMac, LOGE, FL("Disconnect indication on session %d in state %d (sub-state %d)"),
sessionId, pNeighborRoamInfo->neighborRoamState,
pMac->roam.curSubState[sessionId]);
#ifdef FEATURE_WLAN_CCX
{
tCsrRoamSession *pSession = CSR_GET_SESSION( pMac, sessionId);
if (pSession->connectedProfile.isCCXAssoc)
{
vos_mem_copy(&pSession->prevApSSID, &pSession->connectedProfile.SSID, sizeof(tSirMacSSid));
vos_mem_copy(pSession->prevApBssid, pSession->connectedProfile.bssid, sizeof(tSirMacAddr));
pSession->prevOpChannel = pSession->connectedProfile.operationChannel;
pSession->isPrevApInfoValid = TRUE;
pSession->roamTS1 = vos_timer_get_system_time();
}
}
#endif
#ifdef RSSI_HACK
dumpCmdRSSI = -40;
#endif
switch (pNeighborRoamInfo->neighborRoamState)
{
case eCSR_NEIGHBOR_ROAM_STATE_REASSOCIATING:
// Stop scan and neighbor refresh timers.
// These are indeed not required when we are in reassociating
// state.
palTimerStop(pMac->hHdd, pNeighborRoamInfo->neighborScanTimer);
palTimerStop(pMac->hHdd, pNeighborRoamInfo->neighborResultsRefreshTimer);
if (!CSR_IS_ROAM_SUBSTATE_DISASSOC_HO( pMac, sessionId )) {
/*
* Disconnect indication during Disassoc Handoff sub-state
* is received when we are trying to disconnect with the old
* AP during roam. BUT, if receive a disconnect indication
* outside of Disassoc Handoff sub-state, then it means that
* this is a genuine disconnect and we need to clean up.
* Otherwise, we will be stuck in reassoc state which will
* in-turn block scans (see csrIsScanAllowed).
*/
CSR_NEIGHBOR_ROAM_STATE_TRANSITION(eCSR_NEIGHBOR_ROAM_STATE_INIT);
}
break;
case eCSR_NEIGHBOR_ROAM_STATE_INIT:
csrNeighborRoamResetInitStateControlInfo(pMac);
csrNeighborRoamDeregAllRssiIndication(pMac);
break;
case eCSR_NEIGHBOR_ROAM_STATE_CFG_CHAN_LIST_SCAN:
CSR_NEIGHBOR_ROAM_STATE_TRANSITION(eCSR_NEIGHBOR_ROAM_STATE_INIT);
csrNeighborRoamResetCfgListChanScanControlInfo(pMac);
csrNeighborRoamDeregAllRssiIndication(pMac);
break;
case eCSR_NEIGHBOR_ROAM_STATE_PREAUTH_DONE:
/* Stop pre-auth to reassoc interval timer */
palTimerStop(pMac->hHdd, pMac->ft.ftSmeContext.preAuthReassocIntvlTimer);
case eCSR_NEIGHBOR_ROAM_STATE_REPORT_SCAN:
case eCSR_NEIGHBOR_ROAM_STATE_PREAUTHENTICATING:
CSR_NEIGHBOR_ROAM_STATE_TRANSITION(eCSR_NEIGHBOR_ROAM_STATE_INIT)
csrNeighborRoamResetPreauthControlInfo(pMac);
csrNeighborRoamResetReportScanStateControlInfo(pMac);
csrNeighborRoamDeregAllRssiIndication(pMac);
break;
default:
NEIGHBOR_ROAM_DEBUG(pMac, LOGW, FL("Received disconnect event in state %d"), pNeighborRoamInfo->neighborRoamState);
NEIGHBOR_ROAM_DEBUG(pMac, LOGW, FL("Transitioning to INIT state"));
CSR_NEIGHBOR_ROAM_STATE_TRANSITION(eCSR_NEIGHBOR_ROAM_STATE_INIT)
break;
}
return eHAL_STATUS_SUCCESS;
}
/* ---------------------------------------------------------------------------
\fn csrNeighborRoamIndicateConnect
\brief This function is called by CSR as soon as the station connects to an AP.
This initializes all the necessary data structures related to the
associated AP and transitions the state to CONNECTED state
\param pMac - The handle returned by macOpen.
sessionId - CSR session id that got connected
vosStatus - connect status SUCCESS/FAILURE
\return eHAL_STATUS_SUCCESS on success, corresponding error code otherwise
---------------------------------------------------------------------------*/
eHalStatus csrNeighborRoamIndicateConnect(tpAniSirGlobal pMac, tANI_U8 sessionId, VOS_STATUS vosStatus)
{
tpCsrNeighborRoamControlInfo pNeighborRoamInfo = &pMac->roam.neighborRoamInfo;
eHalStatus status = eHAL_STATUS_SUCCESS;
VOS_STATUS vstatus;
#if defined (WLAN_FEATURE_VOWIFI_11R) || defined (FEATURE_WLAN_CCX) || defined(FEATURE_WLAN_LFR)
int init_ft_flag = FALSE;
#endif
smsLog(pMac, LOG2, FL("Connect indication received with session id %d in state %d"), sessionId, pNeighborRoamInfo->neighborRoamState);
switch (pNeighborRoamInfo->neighborRoamState)
{
case eCSR_NEIGHBOR_ROAM_STATE_REASSOCIATING:
if (VOS_STATUS_SUCCESS != vosStatus)
{
/* Just transition the state to INIT state. Rest of the clean up happens when we get next connect indication */
CSR_NEIGHBOR_ROAM_STATE_TRANSITION(eCSR_NEIGHBOR_ROAM_STATE_INIT)
break;
}
/* Fall through if the status is SUCCESS */
case eCSR_NEIGHBOR_ROAM_STATE_INIT:
/* Reset all the data structures here */
csrNeighborRoamResetInitStateControlInfo(pMac);
pNeighborRoamInfo->csrSessionId = sessionId;
#ifdef FEATURE_WLAN_LFR
/*
* Initialize the occupied list ONLY if we are
* transitioning from INIT state to CONNECTED state.
*/
if (eCSR_NEIGHBOR_ROAM_STATE_INIT == pNeighborRoamInfo->neighborRoamState)
csrInitOccupiedChannelsList(pMac);
#endif
CSR_NEIGHBOR_ROAM_STATE_TRANSITION(eCSR_NEIGHBOR_ROAM_STATE_CONNECTED);
vos_mem_copy(pNeighborRoamInfo->currAPbssid,
pMac->roam.roamSession[sessionId].connectedProfile.bssid, sizeof(tCsrBssid));
pNeighborRoamInfo->currAPoperationChannel = pMac->roam.roamSession[sessionId].connectedProfile.operationChannel;
pNeighborRoamInfo->neighborScanTimerInfo.pMac = pMac;
pNeighborRoamInfo->neighborScanTimerInfo.sessionId = sessionId;
pNeighborRoamInfo->currentNeighborLookupThreshold =
pNeighborRoamInfo->cfgParams.neighborLookupThreshold;
#ifdef FEATURE_WLAN_LFR
pNeighborRoamInfo->uEmptyScanCount = 0;
#endif
#if defined (WLAN_FEATURE_VOWIFI_11R) || defined (FEATURE_WLAN_CCX) || defined(FEATURE_WLAN_LFR)
/* Now we can clear the preauthDone that was saved as we are connected afresh */
csrNeighborRoamFreeRoamableBSSList(pMac, &pMac->roam.neighborRoamInfo.FTRoamInfo.preAuthDoneList);
#endif
#ifdef WLAN_FEATURE_VOWIFI_11R
// Based on the auth scheme tell if we are 11r
if ( csrIsAuthType11r( pMac->roam.roamSession[sessionId].connectedProfile.AuthType,
pMac->roam.roamSession[sessionId].connectedProfile.MDID.mdiePresent))
{
if (pMac->roam.configParam.isFastTransitionEnabled)
init_ft_flag = TRUE;
pNeighborRoamInfo->is11rAssoc = eANI_BOOLEAN_TRUE;
}
else
pNeighborRoamInfo->is11rAssoc = eANI_BOOLEAN_FALSE;
NEIGHBOR_ROAM_DEBUG(pMac, LOG2, FL("11rAssoc is = %d"), pNeighborRoamInfo->is11rAssoc);
#endif
#ifdef FEATURE_WLAN_CCX
// Based on the auth scheme tell if we are 11r
if (pMac->roam.roamSession[sessionId].connectedProfile.isCCXAssoc)
{
if (pMac->roam.configParam.isFastTransitionEnabled)
init_ft_flag = TRUE;
pNeighborRoamInfo->isCCXAssoc = eANI_BOOLEAN_TRUE;
}
else
pNeighborRoamInfo->isCCXAssoc = eANI_BOOLEAN_FALSE;
NEIGHBOR_ROAM_DEBUG(pMac, LOG2, FL("isCCXAssoc is = %d ft = %d"),
pNeighborRoamInfo->isCCXAssoc, init_ft_flag);
#endif
#ifdef FEATURE_WLAN_LFR
// If "Legacy Fast Roaming" is enabled
if (csrRoamIsFastRoamEnabled(pMac, sessionId))
{
init_ft_flag = TRUE;
}
#endif
#if defined (WLAN_FEATURE_VOWIFI_11R) || defined (FEATURE_WLAN_CCX) || defined(FEATURE_WLAN_LFR)
if ( init_ft_flag == TRUE )
{
/* Initialize all the data structures needed for the 11r FT Preauth */
pNeighborRoamInfo->FTRoamInfo.preAuthRspWaitTimerInfo.pMac = pMac;
pNeighborRoamInfo->FTRoamInfo.preAuthRspWaitTimerInfo.sessionId = sessionId;
pNeighborRoamInfo->FTRoamInfo.currentNeighborRptRetryNum = 0;
csrNeighborRoamPurgePreauthFailedList(pMac);
NEIGHBOR_ROAM_DEBUG(pMac, LOG2, FL("Registering neighbor lookup DOWN event with TL, RSSI = %d"), pNeighborRoamInfo->currentNeighborLookupThreshold);
/* Register Neighbor Lookup threshold callback with TL for DOWN event only */
vstatus = WLANTL_RegRSSIIndicationCB(pMac->roam.gVosContext, (v_S7_t)pNeighborRoamInfo->currentNeighborLookupThreshold * (-1),
WLANTL_HO_THRESHOLD_DOWN,
csrNeighborRoamNeighborLookupDOWNCallback,
VOS_MODULE_ID_SME, pMac);
if(!VOS_IS_STATUS_SUCCESS(vstatus))
{
//err msg
smsLog(pMac, LOGW, FL(" Couldn't register csrNeighborRoamNeighborLookupDOWNCallback with TL: Status = %d\n"), vstatus);
status = eHAL_STATUS_FAILURE;
}
}
#endif
break;
default:
smsLog(pMac, LOGE, FL("Connect event received in invalid state %d..Ignoring..."), pNeighborRoamInfo->neighborRoamState);
break;
}
return status;
}
#ifdef WLAN_FEATURE_VOWIFI_11R
/* ---------------------------------------------------------------------------
\fn csrNeighborRoamPreAuthResponseWaitTimerHandler
\brief If this function is invoked, that means the preauthentication response
is timed out from the PE. Preauth rsp handler is called with status as
TIMEOUT
\param context - CSR Timer info which holds pMac and session ID
\return VOID
---------------------------------------------------------------------------*/
void csrNeighborRoamPreAuthResponseWaitTimerHandler(void *context)
{
tCsrTimerInfo *pTimerInfo = (tCsrTimerInfo *)context;
tpAniSirGlobal pMac = (tpAniSirGlobal)pTimerInfo->pMac;
tpCsrNeighborRoamControlInfo pNeighborRoamInfo = &pMac->roam.neighborRoamInfo;
pNeighborRoamInfo->FTRoamInfo.preauthRspPending = eANI_BOOLEAN_FALSE;
csrNeighborRoamPreauthRspHandler(pMac, VOS_STATUS_E_TIMEOUT);
}
/* ---------------------------------------------------------------------------
\fn csrNeighborRoamPurgePreauthFailedList
\brief This function purges all the MAC addresses in the pre-auth fail list
\param pMac - The handle returned by macOpen.
\return VOID
---------------------------------------------------------------------------*/
void csrNeighborRoamPurgePreauthFailedList(tpAniSirGlobal pMac)
{
tANI_U8 i;
for (i = 0; i < pMac->roam.neighborRoamInfo.FTRoamInfo.preAuthFailList.numMACAddress; i++)
{
vos_mem_zero(pMac->roam.neighborRoamInfo.FTRoamInfo.preAuthFailList.macAddress[i], sizeof(tSirMacAddr));
}
pMac->roam.neighborRoamInfo.FTRoamInfo.preAuthFailList.numMACAddress = 0;
return;
}
/* ---------------------------------------------------------------------------
\fn csrNeighborRoamInit11rAssocInfo
\brief This function initializes 11r related neighbor roam data structures
\param pMac - The handle returned by macOpen.
\return eHAL_STATUS_SUCCESS on success, corresponding error code otherwise
---------------------------------------------------------------------------*/
eHalStatus csrNeighborRoamInit11rAssocInfo(tpAniSirGlobal pMac)
{
eHalStatus status;
tpCsr11rAssocNeighborInfo pFTRoamInfo = &pMac->roam.neighborRoamInfo.FTRoamInfo;
pMac->roam.neighborRoamInfo.is11rAssoc = eANI_BOOLEAN_FALSE;
pMac->roam.neighborRoamInfo.cfgParams.maxNeighborRetries = pMac->roam.configParam.neighborRoamConfig.nMaxNeighborRetries;
pFTRoamInfo->neighborReportTimeout = CSR_NEIGHBOR_ROAM_REPORT_QUERY_TIMEOUT;
pFTRoamInfo->PEPreauthRespTimeout = CSR_NEIGHBOR_ROAM_PREAUTH_RSP_WAIT_MULTIPLIER * pMac->roam.neighborRoamInfo.cfgParams.neighborScanPeriod;
pFTRoamInfo->neighborRptPending = eANI_BOOLEAN_FALSE;
pFTRoamInfo->preauthRspPending = eANI_BOOLEAN_FALSE;
pFTRoamInfo->preAuthRspWaitTimerInfo.pMac = pMac;
pFTRoamInfo->preAuthRspWaitTimerInfo.sessionId = CSR_SESSION_ID_INVALID;
status = palTimerAlloc(pMac->hHdd, &pFTRoamInfo->preAuthRspWaitTimer,
csrNeighborRoamPreAuthResponseWaitTimerHandler, (void *)&pFTRoamInfo->preAuthRspWaitTimerInfo);
if (eHAL_STATUS_SUCCESS != status)
{
smsLog(pMac, LOGE, FL("Response wait Timer allocation failed"));
return eHAL_STATUS_RESOURCES;
}
pMac->roam.neighborRoamInfo.FTRoamInfo.currentNeighborRptRetryNum = 0;
pMac->roam.neighborRoamInfo.FTRoamInfo.numBssFromNeighborReport = 0;
vos_mem_zero(pMac->roam.neighborRoamInfo.FTRoamInfo.neighboReportBssInfo,
sizeof(tCsrNeighborReportBssInfo) * MAX_BSS_IN_NEIGHBOR_RPT);
status = csrLLOpen(pMac->hHdd, &pFTRoamInfo->preAuthDoneList);
if (eHAL_STATUS_SUCCESS != status)
{
smsLog(pMac, LOGE, FL("LL Open of preauth done AP List failed"));
palTimerFree(pMac->hHdd, pFTRoamInfo->preAuthRspWaitTimer);
return eHAL_STATUS_RESOURCES;
}
return status;
}
#endif /* WLAN_FEATURE_VOWIFI_11R */
/* ---------------------------------------------------------------------------
\fn csrNeighborRoamInit
\brief This function initializes neighbor roam data structures
\param pMac - The handle returned by macOpen.
\return eHAL_STATUS_SUCCESS on success, corresponding error code otherwise
---------------------------------------------------------------------------*/
eHalStatus csrNeighborRoamInit(tpAniSirGlobal pMac)
{
eHalStatus status;
tpCsrNeighborRoamControlInfo pNeighborRoamInfo = &pMac->roam.neighborRoamInfo;
pNeighborRoamInfo->neighborRoamState = eCSR_NEIGHBOR_ROAM_STATE_CLOSED;
pNeighborRoamInfo->prevNeighborRoamState = eCSR_NEIGHBOR_ROAM_STATE_CLOSED;
pNeighborRoamInfo->csrSessionId = CSR_SESSION_ID_INVALID;
pNeighborRoamInfo->cfgParams.maxChannelScanTime = pMac->roam.configParam.neighborRoamConfig.nNeighborScanMaxChanTime;
pNeighborRoamInfo->cfgParams.minChannelScanTime = pMac->roam.configParam.neighborRoamConfig.nNeighborScanMinChanTime;
pNeighborRoamInfo->cfgParams.maxNeighborRetries = 0;
pNeighborRoamInfo->cfgParams.neighborLookupThreshold = pMac->roam.configParam.neighborRoamConfig.nNeighborLookupRssiThreshold;
pNeighborRoamInfo->cfgParams.neighborReassocThreshold = pMac->roam.configParam.neighborRoamConfig.nNeighborReassocRssiThreshold;
pNeighborRoamInfo->cfgParams.neighborScanPeriod = pMac->roam.configParam.neighborRoamConfig.nNeighborScanTimerPeriod;
pNeighborRoamInfo->cfgParams.neighborResultsRefreshPeriod = pMac->roam.configParam.neighborRoamConfig.nNeighborResultsRefreshPeriod;
pNeighborRoamInfo->cfgParams.channelInfo.numOfChannels =
pMac->roam.configParam.neighborRoamConfig.neighborScanChanList.numChannels;
pNeighborRoamInfo->cfgParams.channelInfo.ChannelList =
vos_mem_malloc(pMac->roam.configParam.neighborRoamConfig.neighborScanChanList.numChannels);
if (NULL == pNeighborRoamInfo->cfgParams.channelInfo.ChannelList)
{
smsLog(pMac, LOGE, FL("Memory Allocation for CFG Channel List failed"));
return eHAL_STATUS_RESOURCES;
}
/* Update the roam global structure from CFG */
palCopyMemory(pMac->hHdd, pNeighborRoamInfo->cfgParams.channelInfo.ChannelList,
pMac->roam.configParam.neighborRoamConfig.neighborScanChanList.channelList,
pMac->roam.configParam.neighborRoamConfig.neighborScanChanList.numChannels);
vos_mem_set(pNeighborRoamInfo->currAPbssid, sizeof(tCsrBssid), 0);
pNeighborRoamInfo->currentNeighborLookupThreshold = pMac->roam.neighborRoamInfo.cfgParams.neighborLookupThreshold;
#ifdef FEATURE_WLAN_LFR
pNeighborRoamInfo->uEmptyScanCount = 0;
palZeroMemory(pMac->hHdd, &pNeighborRoamInfo->prevConnProfile,
sizeof(tCsrRoamConnectedProfile));
#endif
pNeighborRoamInfo->scanRspPending = eANI_BOOLEAN_FALSE;
pNeighborRoamInfo->neighborScanTimerInfo.pMac = pMac;
pNeighborRoamInfo->neighborScanTimerInfo.sessionId = CSR_SESSION_ID_INVALID;
status = palTimerAlloc(pMac->hHdd, &pNeighborRoamInfo->neighborScanTimer,
csrNeighborRoamNeighborScanTimerCallback, (void *)&pNeighborRoamInfo->neighborScanTimerInfo);
if (eHAL_STATUS_SUCCESS != status)
{
smsLog(pMac, LOGE, FL("Response wait Timer allocation failed"));
vos_mem_free(pNeighborRoamInfo->cfgParams.channelInfo.ChannelList);
pNeighborRoamInfo->cfgParams.channelInfo.ChannelList = NULL;
return eHAL_STATUS_RESOURCES;
}
status = palTimerAlloc(pMac->hHdd, &pNeighborRoamInfo->neighborResultsRefreshTimer,
csrNeighborRoamResultsRefreshTimerCallback, (void *)&pNeighborRoamInfo->neighborScanTimerInfo);
if (eHAL_STATUS_SUCCESS != status)
{
smsLog(pMac, LOGE, FL("Response wait Timer allocation failed"));
smsLog(pMac, LOGE, FL("LL Open of roamable AP List failed"));
vos_mem_free(pNeighborRoamInfo->cfgParams.channelInfo.ChannelList);
pNeighborRoamInfo->cfgParams.channelInfo.ChannelList = NULL;
palTimerFree(pMac->hHdd, pNeighborRoamInfo->neighborScanTimer);
return eHAL_STATUS_RESOURCES;
}
status = csrLLOpen(pMac->hHdd, &pNeighborRoamInfo->roamableAPList);
if (eHAL_STATUS_SUCCESS != status)
{
smsLog(pMac, LOGE, FL("LL Open of roamable AP List failed"));
vos_mem_free(pNeighborRoamInfo->cfgParams.channelInfo.ChannelList);
pNeighborRoamInfo->cfgParams.channelInfo.ChannelList = NULL;
palTimerFree(pMac->hHdd, pNeighborRoamInfo->neighborScanTimer);
palTimerFree(pMac->hHdd, pNeighborRoamInfo->neighborResultsRefreshTimer);
return eHAL_STATUS_RESOURCES;
}
pNeighborRoamInfo->roamChannelInfo.currentChanIndex = CSR_NEIGHBOR_ROAM_INVALID_CHANNEL_INDEX;
pNeighborRoamInfo->roamChannelInfo.currentChannelListInfo.numOfChannels = 0;
pNeighborRoamInfo->roamChannelInfo.currentChannelListInfo.ChannelList = NULL;
pNeighborRoamInfo->roamChannelInfo.chanListScanInProgress = eANI_BOOLEAN_FALSE;
pNeighborRoamInfo->roamChannelInfo.IAPPNeighborListReceived = eANI_BOOLEAN_FALSE;
#ifdef WLAN_FEATURE_VOWIFI_11R
status = csrNeighborRoamInit11rAssocInfo(pMac);
if (eHAL_STATUS_SUCCESS != status)
{
smsLog(pMac, LOGE, FL("LL Open of roamable AP List failed"));
vos_mem_free(pNeighborRoamInfo->cfgParams.channelInfo.ChannelList);
pNeighborRoamInfo->cfgParams.channelInfo.ChannelList = NULL;
palTimerFree(pMac->hHdd, pNeighborRoamInfo->neighborScanTimer);
palTimerFree(pMac->hHdd, pNeighborRoamInfo->neighborResultsRefreshTimer);
csrLLClose(&pNeighborRoamInfo->roamableAPList);
return eHAL_STATUS_RESOURCES;
}
#endif
/* Initialize this with the current tick count */
pNeighborRoamInfo->scanRequestTimeStamp = (tANI_TIMESTAMP)palGetTickCount(pMac->hHdd);
CSR_NEIGHBOR_ROAM_STATE_TRANSITION(eCSR_NEIGHBOR_ROAM_STATE_INIT)
return eHAL_STATUS_SUCCESS;
}
/* ---------------------------------------------------------------------------
\fn csrNeighborRoamClose
\brief This function closes/frees all the neighbor roam data structures
\param pMac - The handle returned by macOpen.
\return VOID
---------------------------------------------------------------------------*/
void csrNeighborRoamClose(tpAniSirGlobal pMac)
{
tpCsrNeighborRoamControlInfo pNeighborRoamInfo = &pMac->roam.neighborRoamInfo;
if (eCSR_NEIGHBOR_ROAM_STATE_CLOSED == pNeighborRoamInfo->neighborRoamState)
{
smsLog(pMac, LOGW, FL("Neighbor Roam Algorithm Already Closed"));
return;
}
if (pNeighborRoamInfo->cfgParams.channelInfo.ChannelList)
vos_mem_free(pNeighborRoamInfo->cfgParams.channelInfo.ChannelList);
pNeighborRoamInfo->cfgParams.channelInfo.ChannelList = NULL;
pNeighborRoamInfo->neighborScanTimerInfo.pMac = NULL;
pNeighborRoamInfo->neighborScanTimerInfo.sessionId = CSR_SESSION_ID_INVALID;
palTimerFree(pMac->hHdd, pNeighborRoamInfo->neighborScanTimer);
palTimerFree(pMac->hHdd, pNeighborRoamInfo->neighborResultsRefreshTimer);
/* Should free up the nodes in the list before closing the double Linked list */
csrNeighborRoamFreeRoamableBSSList(pMac, &pNeighborRoamInfo->roamableAPList);
csrLLClose(&pNeighborRoamInfo->roamableAPList);
if (pNeighborRoamInfo->roamChannelInfo.currentChannelListInfo.ChannelList)
{
vos_mem_free(pNeighborRoamInfo->roamChannelInfo.currentChannelListInfo.ChannelList);
}
pNeighborRoamInfo->roamChannelInfo.currentChannelListInfo.ChannelList = NULL;
pNeighborRoamInfo->roamChannelInfo.currentChanIndex = CSR_NEIGHBOR_ROAM_INVALID_CHANNEL_INDEX;
pNeighborRoamInfo->roamChannelInfo.currentChannelListInfo.numOfChannels = 0;
pNeighborRoamInfo->roamChannelInfo.currentChannelListInfo.ChannelList = NULL;
pNeighborRoamInfo->roamChannelInfo.chanListScanInProgress = eANI_BOOLEAN_FALSE;
pNeighborRoamInfo->roamChannelInfo.IAPPNeighborListReceived = eANI_BOOLEAN_FALSE;
/* Free the profile.. */
csrReleaseProfile(pMac, &pNeighborRoamInfo->csrNeighborRoamProfile);
#ifdef WLAN_FEATURE_VOWIFI_11R
pMac->roam.neighborRoamInfo.FTRoamInfo.currentNeighborRptRetryNum = 0;
palTimerFree(pMac->hHdd, pMac->roam.neighborRoamInfo.FTRoamInfo.preAuthRspWaitTimer);
pMac->roam.neighborRoamInfo.FTRoamInfo.preAuthRspWaitTimerInfo.pMac = NULL;
pMac->roam.neighborRoamInfo.FTRoamInfo.preAuthRspWaitTimerInfo.sessionId = CSR_SESSION_ID_INVALID;
pMac->roam.neighborRoamInfo.FTRoamInfo.numBssFromNeighborReport = 0;
vos_mem_zero(pMac->roam.neighborRoamInfo.FTRoamInfo.neighboReportBssInfo,
sizeof(tCsrNeighborReportBssInfo) * MAX_BSS_IN_NEIGHBOR_RPT);
csrNeighborRoamFreeRoamableBSSList(pMac, &pMac->roam.neighborRoamInfo.FTRoamInfo.preAuthDoneList);
csrLLClose(&pMac->roam.neighborRoamInfo.FTRoamInfo.preAuthDoneList);
#endif /* WLAN_FEATURE_VOWIFI_11R */
CSR_NEIGHBOR_ROAM_STATE_TRANSITION(eCSR_NEIGHBOR_ROAM_STATE_CLOSED)
return;
}
/* ---------------------------------------------------------------------------
\fn csrNeighborRoamRequestHandoff
\brief This function triggers actual switching from one AP to the new AP.
It issues disassociate with reason code as Handoff and CSR as a part of
handling disassoc rsp, issues reassociate to the new AP
\param pMac - The handle returned by macOpen.
\return VOID
---------------------------------------------------------------------------*/
void csrNeighborRoamRequestHandoff(tpAniSirGlobal pMac)
{
tCsrRoamInfo roamInfo;
tpCsrNeighborRoamControlInfo pNeighborRoamInfo = &pMac->roam.neighborRoamInfo;
tANI_U32 sessionId = pNeighborRoamInfo->csrSessionId;
tCsrNeighborRoamBSSInfo handoffNode;
extern void csrRoamRoamingStateDisassocRspProcessor( tpAniSirGlobal pMac, tSirSmeDisassocRsp *pSmeDisassocRsp );
tANI_U32 roamId = 0;
if (pMac->roam.neighborRoamInfo.neighborRoamState != eCSR_NEIGHBOR_ROAM_STATE_PREAUTH_DONE)
{
smsLog(pMac, LOGE, FL("Roam requested when Neighbor roam is in %d state"),
pMac->roam.neighborRoamInfo.neighborRoamState);
return;
}
vos_mem_zero(&roamInfo, sizeof(tCsrRoamInfo));
csrRoamCallCallback(pMac, pNeighborRoamInfo->csrSessionId, &roamInfo, roamId, eCSR_ROAM_FT_START,
eSIR_SME_SUCCESS);
vos_mem_zero(&roamInfo, sizeof(tCsrRoamInfo));
CSR_NEIGHBOR_ROAM_STATE_TRANSITION(eCSR_NEIGHBOR_ROAM_STATE_REASSOCIATING)
csrNeighborRoamGetHandoffAPInfo(pMac, &handoffNode);
smsLog(pMac, LOGE, FL("HANDOFF CANDIDATE BSSID %02x:%02x:%02x:%02x:%02x:%02x"),
handoffNode.pBssDescription->bssId[0],
handoffNode.pBssDescription->bssId[1],
handoffNode.pBssDescription->bssId[2],
handoffNode.pBssDescription->bssId[3],
handoffNode.pBssDescription->bssId[4],
handoffNode.pBssDescription->bssId[5]);
/* Free the profile.. Just to make sure we dont leak memory here */
csrReleaseProfile(pMac, &pNeighborRoamInfo->csrNeighborRoamProfile);
/* Create the Handoff AP profile. Copy the currently connected profile and update only the BSSID and channel number
This should happen before issuing disconnect */
csrRoamCopyConnectedProfile(pMac, pNeighborRoamInfo->csrSessionId, &pNeighborRoamInfo->csrNeighborRoamProfile);
vos_mem_copy(pNeighborRoamInfo->csrNeighborRoamProfile.BSSIDs.bssid, handoffNode.pBssDescription->bssId, sizeof(tSirMacAddr));
pNeighborRoamInfo->csrNeighborRoamProfile.ChannelInfo.ChannelList[0] = handoffNode.pBssDescription->channelId;
NEIGHBOR_ROAM_DEBUG(pMac, LOGW, " csrRoamHandoffRequested: disassociating with current AP\n");
if(!HAL_STATUS_SUCCESS(csrRoamIssueDisassociateCmd(pMac, sessionId, eCSR_DISCONNECT_REASON_HANDOFF)))
{
smsLog(pMac, LOGW, "csrRoamHandoffRequested: fail to issue disassociate\n");
return;
}
//notify HDD for handoff, providing the BSSID too
roamInfo.reasonCode = eCsrRoamReasonBetterAP;
vos_mem_copy(roamInfo.bssid,
handoffNode.pBssDescription->bssId,
sizeof( tCsrBssid ));
csrRoamCallCallback(pMac, sessionId, &roamInfo, 0, eCSR_ROAM_ROAMING_START, eCSR_ROAM_RESULT_NONE);
return;
}
/* ---------------------------------------------------------------------------
\fn csrNeighborRoamIsHandoffInProgress
\brief This function returns whether handoff is in progress or not based on
the current neighbor roam state
\param pMac - The handle returned by macOpen.
is11rReassoc - Return whether reassoc is of type 802.11r reassoc
\return eANI_BOOLEAN_TRUE if reassoc in progress, eANI_BOOLEAN_FALSE otherwise
---------------------------------------------------------------------------*/
tANI_BOOLEAN csrNeighborRoamIsHandoffInProgress(tpAniSirGlobal pMac)
{
if (eCSR_NEIGHBOR_ROAM_STATE_REASSOCIATING == pMac->roam.neighborRoamInfo.neighborRoamState)
return eANI_BOOLEAN_TRUE;
return eANI_BOOLEAN_FALSE;
}
#if defined(WLAN_FEATURE_VOWIFI_11R) || defined(WLAN_FEATURE_NEIGHBOR_ROAMING)
/* ---------------------------------------------------------------------------
\fn csrNeighborRoamIs11rAssoc
\brief This function returns whether the current association is a 11r assoc or not
\param pMac - The handle returned by macOpen.
\return eANI_BOOLEAN_TRUE if current assoc is 11r, eANI_BOOLEAN_FALSE otherwise
---------------------------------------------------------------------------*/
tANI_BOOLEAN csrNeighborRoamIs11rAssoc(tpAniSirGlobal pMac)
{
return pMac->roam.neighborRoamInfo.is11rAssoc;
}
#endif /* WLAN_FEATURE_VOWIFI_11R */
/* ---------------------------------------------------------------------------
\fn csrNeighborRoamGetHandoffAPInfo
\brief This function returns the best possible AP for handoff. For 11R case, it
returns the 1st entry from pre-auth done list. For non-11r case, it returns
the 1st entry from roamable AP list
\param pMac - The handle returned by macOpen.
pHandoffNode - AP node that is the handoff candidate returned
\return VOID
---------------------------------------------------------------------------*/
void csrNeighborRoamGetHandoffAPInfo(tpAniSirGlobal pMac, tpCsrNeighborRoamBSSInfo pHandoffNode)
{
tpCsrNeighborRoamControlInfo pNeighborRoamInfo = &pMac->roam.neighborRoamInfo;
tpCsrNeighborRoamBSSInfo pBssNode;
VOS_ASSERT(NULL != pHandoffNode);
#ifdef WLAN_FEATURE_VOWIFI_11R
if (pNeighborRoamInfo->is11rAssoc)
{
/* Always the BSS info in the head is the handoff candidate */
pBssNode = csrNeighborRoamGetRoamableAPListNextEntry(pMac, &pNeighborRoamInfo->FTRoamInfo.preAuthDoneList, NULL);
NEIGHBOR_ROAM_DEBUG(pMac, LOG1, FL("Number of Handoff candidates = %d"), csrLLCount(&pNeighborRoamInfo->FTRoamInfo.preAuthDoneList));
}
else
#endif
#ifdef FEATURE_WLAN_CCX
if (pNeighborRoamInfo->isCCXAssoc)
{
/* Always the BSS info in the head is the handoff candidate */
pBssNode = csrNeighborRoamGetRoamableAPListNextEntry(pMac, &pNeighborRoamInfo->FTRoamInfo.preAuthDoneList, NULL);
NEIGHBOR_ROAM_DEBUG(pMac, LOG1, FL("Number of Handoff candidates = %d"), csrLLCount(&pNeighborRoamInfo->FTRoamInfo.preAuthDoneList));
}
else
#endif
#ifdef FEATURE_WLAN_LFR
if (csrRoamIsFastRoamEnabled(pMac, CSR_SESSION_ID_INVALID))
{
/* Always the BSS info in the head is the handoff candidate */
pBssNode = csrNeighborRoamGetRoamableAPListNextEntry(pMac, &pNeighborRoamInfo->FTRoamInfo.preAuthDoneList, NULL);
NEIGHBOR_ROAM_DEBUG(pMac, LOG1, FL("Number of Handoff candidates = %d"), csrLLCount(&pNeighborRoamInfo->FTRoamInfo.preAuthDoneList));
}
else
#endif
{
pBssNode = csrNeighborRoamGetRoamableAPListNextEntry(pMac, &pNeighborRoamInfo->roamableAPList, NULL);
NEIGHBOR_ROAM_DEBUG(pMac, LOG1, FL("Number of Handoff candidates = %d"), csrLLCount(&pNeighborRoamInfo->roamableAPList));
}
vos_mem_copy(pHandoffNode, pBssNode, sizeof(tCsrNeighborRoamBSSInfo));
return;
}
/* ---------------------------------------------------------------------------
\brief This function returns TRUE if preauth is completed
\param pMac - The handle returned by macOpen.
\return boolean
---------------------------------------------------------------------------*/
tANI_BOOLEAN csrNeighborRoamStatePreauthDone(tpAniSirGlobal pMac)
{
return (pMac->roam.neighborRoamInfo.neighborRoamState ==
eCSR_NEIGHBOR_ROAM_STATE_PREAUTH_DONE);
}
/* ---------------------------------------------------------------------------
\brief In the event that we are associated with AP1 and we have
completed pre auth with AP2. Then we receive a deauth/disassoc from
AP1.
At this point neighbor roam is in pre auth done state, pre auth timer
is running. We now handle this case by stopping timer and clearing
the pre-auth state. We basically clear up and just go to disconnected
state.
\param pMac - The handle returned by macOpen.
\return boolean
---------------------------------------------------------------------------*/
void csrNeighborRoamTranistionPreauthDoneToDisconnected(tpAniSirGlobal pMac)
{
if (pMac->roam.neighborRoamInfo.neighborRoamState !=
eCSR_NEIGHBOR_ROAM_STATE_PREAUTH_DONE) return;
// Stop timer
palTimerStop(pMac->hHdd, pMac->ft.ftSmeContext.preAuthReassocIntvlTimer);
// Transition to init state
CSR_NEIGHBOR_ROAM_STATE_TRANSITION(eCSR_NEIGHBOR_ROAM_STATE_INIT)
}
#endif /* WLAN_FEATURE_NEIGHBOR_ROAMING */