| /* |
| * 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. |
| */ |
| |
| /* |
| * Airgo Networks, Inc proprietary. All rights reserved. |
| * This file limLinkMonitoringAlgo.cc contains the code for |
| * Link monitoring algorithm on AP and heart beat failure |
| * handling on STA. |
| * Author: Chandra Modumudi |
| * Date: 03/01/02 |
| * History:- |
| * Date Modified by Modification Information |
| * -------------------------------------------------------------------- |
| * |
| */ |
| |
| #include "aniGlobal.h" |
| #include "wniCfgAp.h" |
| #include "cfgApi.h" |
| |
| #ifdef FEATURE_WLAN_NON_INTEGRATED_SOC |
| #include "halDataStruct.h" |
| #include "halCommonApi.h" |
| #endif |
| |
| #include "schApi.h" |
| #include "pmmApi.h" |
| #include "utilsApi.h" |
| #include "limAssocUtils.h" |
| #include "limTypes.h" |
| #include "limUtils.h" |
| #include "limPropExtsUtils.h" |
| |
| #ifdef FEATURE_WLAN_DIAG_SUPPORT_LIM //FEATURE_WLAN_DIAG_SUPPORT |
| #include "vos_diag_core_log.h" |
| #endif //FEATURE_WLAN_DIAG_SUPPORT |
| #include "limSession.h" |
| #include "limSerDesUtils.h" |
| |
| |
| /** |
| * limSendKeepAliveToPeer() |
| * |
| *FUNCTION: |
| * This function is called to send Keep alive message to peer |
| * |
| *LOGIC: |
| * |
| *ASSUMPTIONS: |
| * |
| *NOTE: |
| * NA |
| * |
| * @param pMac - Pointer to Global MAC structure |
| * @return None |
| */ |
| |
| void |
| limSendKeepAliveToPeer(tpAniSirGlobal pMac) |
| { |
| |
| #ifdef ANI_PRODUCT_TYPE_AP //oct 3rd review |
| |
| tpDphHashNode pStaDs; |
| //fetch the sessionEntry based on the sessionId |
| tpPESession psessionEntry; |
| |
| if((psessionEntry = peFindSessionBySessionId(pMac, pMac->lim.limTimers.gLimKeepaliveTimer.sessionId))== NULL) |
| { |
| limLog(pMac, LOGP,FL("Session Does not exist for given sessionID\n")); |
| return; |
| } |
| |
| // If keep live has been disabled, exit |
| if (pMac->sch.keepAlive == 0) |
| return; |
| |
| if ( (limIsSystemInScanState(pMac) == false) && |
| (psessionEntry->limSystemRole == eLIM_AP_ROLE)) |
| { |
| tANI_U16 i; |
| tANI_U32 len = SIR_MAC_MAX_SSID_LENGTH; |
| tAniSSID ssId; |
| |
| /* |
| ** send keepalive NULL data frame for each |
| ** associated STA; |
| */ |
| |
| for (i=2; i<pMac->lim.maxStation; i++) |
| { |
| pStaDs = dphGetHashEntry(pMac, i, &psessionEntry->dph.dphHashTable); |
| |
| if (pStaDs && pStaDs->added && |
| (pStaDs->mlmStaContext.mlmState == eLIM_MLM_LINK_ESTABLISHED_STATE)) |
| { |
| // SP-Tx hangs at times when a zero-lenght packet is transmitted |
| // To avoid any interoperability issue with third party clinet |
| // instead of sending a non-zero data-null packet, AP sends a |
| // probe response as a keep alive packet. |
| if (wlan_cfgGetStr(pMac, WNI_CFG_SSID, |
| (tANI_U8 *) &ssId.ssId, |
| (tANI_U32 *) &len) != eSIR_SUCCESS) |
| { |
| /// Could not get SSID from CFG. Log error. |
| limLog(pMac, LOGP, FL("could not retrieve SSID\n")); |
| } |
| ssId.length = (tANI_U8) len; |
| |
| PELOG2(limLog(pMac, LOG2, FL("Sending keepalive Probe Rsp Msg to ")); |
| limPrintMacAddr(pMac, pStaDs->staAddr, LOG2);) |
| limSendProbeRspMgmtFrame(pMac, |
| pStaDs->staAddr, |
| &ssId, |
| i, |
| DPH_KEEPALIVE_FRAME, 0); |
| } |
| } |
| } |
| #endif |
| } /*** limSendKeepAliveToPeer() ***/ |
| |
| |
| /** --------------------------------------------------------- |
| \fn limDeleteStaContext |
| \brief This function handles the message from HAL: |
| \ WDA_DELETE_STA_CONTEXT_IND. This function |
| \ validates that the given station id exist, and if so, |
| \ deletes the station by calling limTriggerSTAdeletion. |
| \param tpAniSirGlobal pMac |
| \param tpSirMsgQ limMsg |
| \return none |
| -----------------------------------------------------------*/ |
| void |
| limDeleteStaContext(tpAniSirGlobal pMac, tpSirMsgQ limMsg) |
| { |
| tpDeleteStaContext pMsg = (tpDeleteStaContext)limMsg->bodyptr; |
| tpDphHashNode pStaDs; |
| tpPESession psessionEntry ; |
| tANI_U8 sessionId; |
| |
| if(NULL == pMsg) |
| { |
| PELOGE(limLog(pMac, LOGE,FL("Invalid body pointer in message\n"));) |
| return; |
| } |
| if((psessionEntry = peFindSessionByBssid(pMac,pMsg->bssId,&sessionId))== NULL) |
| { |
| PELOGE(limLog(pMac, LOGE,FL("session does not exist for given BSSId\n"));) |
| palFreeMemory(pMac->hHdd, pMsg); |
| return; |
| } |
| |
| #ifdef WLAN_SOFTAP_FEATURE |
| switch(pMsg->reasonCode) |
| { |
| case HAL_DEL_STA_REASON_CODE_KEEP_ALIVE: |
| case HAL_DEL_STA_REASON_CODE_TIM_BASED: |
| PELOGE(limLog(pMac, LOGE, FL(" Deleting station: staId = %d, reasonCode = %d\n"), pMsg->staId, pMsg->reasonCode);) |
| #endif |
| if((eLIM_BT_AMP_AP_ROLE == psessionEntry->limSystemRole) || |
| (eLIM_AP_ROLE == psessionEntry->limSystemRole)) |
| { |
| pStaDs = dphGetHashEntry(pMac, pMsg->assocId, &psessionEntry->dph.dphHashTable); |
| } |
| else |
| { |
| pStaDs = dphGetHashEntry(pMac, DPH_STA_HASH_INDEX_PEER, &psessionEntry->dph.dphHashTable); |
| } |
| if (!pStaDs) |
| { |
| PELOGE(limLog(pMac, LOGE, FL("Skip STA deletion (invalid STA) limSystemRole=%d\n"),psessionEntry->limSystemRole);) |
| palFreeMemory(pMac->hHdd, pMsg); |
| return; |
| } |
| |
| /* check and see if same staId. This is to avoid the scenario |
| * where we're trying to delete a staId we just added. |
| */ |
| if (pStaDs->staIndex != pMsg->staId) |
| { |
| PELOGE(limLog(pMac, LOGE, FL("staid mismatch: %d vs %d \n"), pStaDs->staIndex, pMsg->staId);) |
| palFreeMemory(pMac->hHdd, pMsg); |
| return; |
| } |
| |
| if((eLIM_BT_AMP_AP_ROLE == psessionEntry->limSystemRole) || |
| (eLIM_AP_ROLE == psessionEntry->limSystemRole)) |
| { |
| PELOG1(limLog(pMac, LOG1, FL("SAP:lim Delete Station Context (staId: %d, assocId: %d) \n"), |
| pMsg->staId, pMsg->assocId);) |
| limTriggerSTAdeletion(pMac, pStaDs, psessionEntry); |
| } |
| else |
| { |
| //TearDownLink with AP |
| tLimMlmDeauthInd mlmDeauthInd; |
| PELOGW(limLog(pMac, LOGW, FL("lim Delete Station Context (staId: %d, assocId: %d) \n"), |
| pMsg->staId, pMsg->assocId);) |
| |
| pStaDs->mlmStaContext.disassocReason = eSIR_MAC_UNSPEC_FAILURE_REASON; |
| pStaDs->mlmStaContext.cleanupTrigger = eLIM_LINK_MONITORING_DEAUTH; |
| |
| // Issue Deauth Indication to SME. |
| palCopyMemory( pMac->hHdd, (tANI_U8 *) &mlmDeauthInd.peerMacAddr, |
| pStaDs->staAddr, sizeof(tSirMacAddr)); |
| mlmDeauthInd.reasonCode = (tANI_U8) pStaDs->mlmStaContext.disassocReason; |
| mlmDeauthInd.deauthTrigger = pStaDs->mlmStaContext.cleanupTrigger; |
| |
| limPostSmeMessage(pMac, LIM_MLM_DEAUTH_IND, (tANI_U32 *) &mlmDeauthInd); |
| |
| limSendSmeDeauthInd(pMac, pStaDs, psessionEntry); |
| } |
| #ifdef WLAN_SOFTAP_FEATURE |
| break; |
| |
| case HAL_DEL_STA_REASON_CODE_UNKNOWN_A2: |
| PELOGE(limLog(pMac, LOGE, FL(" Deleting Unknown station \n"));) |
| limPrintMacAddr(pMac, pMsg->addr2, LOGE); |
| limSendDeauthMgmtFrame( pMac, eSIR_MAC_CLASS3_FRAME_FROM_NON_ASSOC_STA_REASON, pMsg->addr2, psessionEntry, FALSE); |
| break; |
| |
| default: |
| PELOGE(limLog(pMac, LOGE, FL(" Unknown reason code \n"));) |
| break; |
| |
| } |
| #endif |
| palFreeMemory(pMac->hHdd, pMsg); |
| return; |
| } |
| |
| |
| /** |
| * limTriggerSTAdeletion() |
| * |
| *FUNCTION: |
| * This function is called to trigger STA context deletion |
| * |
| *LOGIC: |
| * |
| *ASSUMPTIONS: |
| * |
| *NOTE: |
| * NA |
| * |
| * @param pMac - Pointer to global MAC structure |
| * @param pStaDs - Pointer to internal STA Datastructure |
| * @return None |
| */ |
| void |
| limTriggerSTAdeletion(tpAniSirGlobal pMac, tpDphHashNode pStaDs, tpPESession psessionEntry) |
| { |
| tSirSmeDeauthReq *pSmeDeauthReq; |
| tANI_U8 *pBuf; |
| tANI_U8 *pLen; |
| tANI_U16 msgLength = 0; |
| |
| if (! pStaDs) |
| { |
| PELOGW(limLog(pMac, LOGW, FL("Skip STA deletion (invalid STA)\n"));) |
| return; |
| } |
| /** |
| * MAC based Authentication was used. Trigger |
| * Deauthentication frame to peer since it will |
| * take care of disassociation as well. |
| */ |
| |
| if( eHAL_STATUS_SUCCESS != palAllocateMemory( pMac->hHdd, (void **)&pSmeDeauthReq, sizeof(tSirSmeDeauthReq))) |
| { |
| limLog(pMac, LOGP, FL("palAllocateMemory failed for eWNI_SME_DEAUTH_REQ \n")); |
| return; |
| } |
| |
| pBuf = (tANI_U8 *) &pSmeDeauthReq->messageType; |
| |
| //messageType |
| #ifdef WLAN_SOFTAP_FEATURE |
| limCopyU16((tANI_U8*)pBuf, eWNI_SME_DISASSOC_REQ); |
| #else |
| limCopyU16((tANI_U8*)pBuf, eWNI_SME_DEAUTH_REQ); |
| #endif |
| pBuf += sizeof(tANI_U16); |
| msgLength += sizeof(tANI_U16); |
| |
| //length |
| pLen = pBuf; |
| pBuf += sizeof(tANI_U16); |
| msgLength += sizeof(tANI_U16); |
| |
| //sessionId |
| *pBuf = psessionEntry->smeSessionId; |
| pBuf++; |
| msgLength++; |
| |
| //transactionId |
| limCopyU16((tANI_U8*)pBuf, psessionEntry->transactionId); |
| pBuf += sizeof(tANI_U16); |
| msgLength += sizeof(tANI_U16); |
| |
| //bssId |
| palCopyMemory( pMac->hHdd, pBuf, psessionEntry->bssId, sizeof(tSirMacAddr) ); |
| pBuf += sizeof(tSirMacAddr); |
| msgLength += sizeof(tSirMacAddr); |
| |
| //peerMacAddr |
| palCopyMemory( pMac->hHdd, pBuf, pStaDs->staAddr, sizeof(tSirMacAddr) ); |
| pBuf += sizeof(tSirMacAddr); |
| msgLength += sizeof(tSirMacAddr); |
| |
| //reasonCode |
| #ifdef WLAN_SOFTAP_FEATURE |
| limCopyU16((tANI_U8*)pBuf, (tANI_U16)eLIM_LINK_MONITORING_DISASSOC); |
| #else |
| limCopyU16((tANI_U8*)pBuf, (tANI_U16)eLIM_LINK_MONITORING_DEAUTH); |
| #endif |
| pBuf += sizeof(tANI_U16); |
| msgLength += sizeof(tANI_U16); |
| |
| //Do not send disassoc OTA |
| //pBuf[0] = 1 means do not send the disassoc frame over the air |
| //pBuf[0] = 0 means send the disassoc frame over the air |
| pBuf[0]= 0; |
| pBuf += sizeof(tANI_U8); |
| msgLength += sizeof(tANI_U8); |
| |
| |
| #if (WNI_POLARIS_FW_PRODUCT == AP) |
| //aid |
| limCopyU16((tANI_U8*)pBuf, pStaDs->assocId); |
| pBuf += sizeof(tANI_U16); |
| msgLength += sizeof(tANI_U16); |
| #endif |
| |
| //Fill in length |
| limCopyU16((tANI_U8*)pLen, msgLength); |
| |
| #ifdef WLAN_SOFTAP_FEATURE |
| limPostSmeMessage(pMac, eWNI_SME_DISASSOC_REQ, (tANI_U32 *) pSmeDeauthReq); |
| #else |
| limPostSmeMessage(pMac, eWNI_SME_DEAUTH_REQ, (tANI_U32 *) pSmeDeauthReq); |
| #endif |
| palFreeMemory( pMac->hHdd, pSmeDeauthReq ); |
| |
| } /*** end limTriggerSTAdeletion() ***/ |
| |
| |
| |
| /** |
| * limTearDownLinkWithAp() |
| * |
| *FUNCTION: |
| * This function is called when heartbeat (beacon reception) |
| * fails on STA |
| * |
| *LOGIC: |
| * |
| *ASSUMPTIONS: |
| * |
| *NOTE: |
| * |
| * @param pMac - Pointer to Global MAC structure |
| * @return None |
| */ |
| |
| void |
| limTearDownLinkWithAp(tpAniSirGlobal pMac, tANI_U8 sessionId, tSirMacReasonCodes reasonCode) |
| { |
| tpDphHashNode pStaDs = NULL; |
| |
| //tear down the following sessionEntry |
| tpPESession psessionEntry; |
| |
| if((psessionEntry = peFindSessionBySessionId(pMac, sessionId))== NULL) |
| { |
| limLog(pMac, LOGP,FL("Session Does not exist for given sessionID\n")); |
| return; |
| } |
| /** |
| * Heart beat failed for upto threshold value |
| * and AP did not respond for Probe request. |
| * Trigger link tear down. |
| */ |
| |
| pMac->pmm.inMissedBeaconScenario = FALSE; |
| limLog(pMac, LOGW, |
| FL("No ProbeRsp from AP after HB failure. Tearing down link\n")); |
| |
| // Deactivate heartbeat timer |
| limHeartBeatDeactivateAndChangeTimer(pMac, psessionEntry); |
| |
| // Announce loss of link to Roaming algorithm |
| // and cleanup by sending SME_DISASSOC_REQ to SME |
| |
| pStaDs = dphGetHashEntry(pMac, DPH_STA_HASH_INDEX_PEER, &psessionEntry->dph.dphHashTable); |
| |
| |
| if (pStaDs != NULL) |
| { |
| tLimMlmDeauthInd mlmDeauthInd; |
| |
| pStaDs->mlmStaContext.disassocReason = reasonCode; |
| pStaDs->mlmStaContext.cleanupTrigger = eLIM_LINK_MONITORING_DEAUTH; |
| |
| /// Issue Deauth Indication to SME. |
| palCopyMemory( pMac->hHdd, (tANI_U8 *) &mlmDeauthInd.peerMacAddr, |
| pStaDs->staAddr, |
| sizeof(tSirMacAddr)); |
| mlmDeauthInd.reasonCode = (tANI_U8) pStaDs->mlmStaContext.disassocReason; |
| mlmDeauthInd.deauthTrigger = pStaDs->mlmStaContext.cleanupTrigger; |
| |
| limPostSmeMessage(pMac, LIM_MLM_DEAUTH_IND, (tANI_U32 *) &mlmDeauthInd); |
| |
| limSendSmeDeauthInd(pMac, pStaDs, psessionEntry); |
| } |
| } /*** limTearDownLinkWithAp() ***/ |
| |
| |
| |
| |
| /** |
| * limHandleHeartBeatFailure() |
| * |
| *FUNCTION: |
| * This function is called when heartbeat (beacon reception) |
| * fails on STA |
| * |
| *LOGIC: |
| * |
| *ASSUMPTIONS: |
| * |
| *NOTE: |
| * |
| * @param pMac - Pointer to Global MAC structure |
| * @return None |
| */ |
| |
| void limHandleHeartBeatFailure(tpAniSirGlobal pMac,tpPESession psessionEntry) |
| { |
| |
| #ifdef FEATURE_WLAN_DIAG_SUPPORT_LIM //FEATURE_WLAN_DIAG_SUPPORT |
| vos_log_beacon_update_pkt_type *log_ptr = NULL; |
| #endif //FEATURE_WLAN_DIAG_SUPPORT |
| |
| /* If gLimHeartBeatTimer fires between the interval of sending WDA_ENTER_BMPS_REQUEST |
| * to the HAL and receiving WDA_ENTER_BMPS_RSP from the HAL, then LIM (PE) tries to Process the |
| * SIR_LIM_HEAR_BEAT_TIMEOUT message but The PE state is ePMM_STATE_BMPS_SLEEP so PE dont |
| * want to handle heartbeat timeout in the BMPS, because Firmware handles it in BMPS. |
| * So just return from heartbeatfailure handler |
| */ |
| if(!IS_ACTIVEMODE_OFFLOAD_FEATURE_ENABLE && (!limIsSystemInActiveState(pMac))) |
| return; |
| |
| #ifdef FEATURE_WLAN_DIAG_SUPPORT_LIM //FEATURE_WLAN_DIAG_SUPPORT |
| WLAN_VOS_DIAG_LOG_ALLOC(log_ptr, vos_log_beacon_update_pkt_type, LOG_WLAN_BEACON_UPDATE_C); |
| if(log_ptr) |
| log_ptr->bcn_rx_cnt = psessionEntry->LimRxedBeaconCntDuringHB; |
| WLAN_VOS_DIAG_LOG_REPORT(log_ptr); |
| #endif //FEATURE_WLAN_DIAG_SUPPORT |
| |
| /* Ensure HB Status for the session has been reseted */ |
| psessionEntry->LimHBFailureStatus = eANI_BOOLEAN_FALSE; |
| /** Re Activate Timer if the system is Waiting for ReAssoc Response*/ |
| if(((psessionEntry->limSystemRole == eLIM_STA_IN_IBSS_ROLE) || |
| (psessionEntry->limSystemRole == eLIM_STA_ROLE) || |
| (psessionEntry->limSystemRole == eLIM_BT_AMP_STA_ROLE)) && |
| (LIM_IS_CONNECTION_ACTIVE(psessionEntry) || |
| (limIsReassocInProgress(pMac, psessionEntry)))) |
| { |
| if(psessionEntry->LimRxedBeaconCntDuringHB < MAX_NO_BEACONS_PER_HEART_BEAT_INTERVAL) |
| pMac->lim.gLimHeartBeatBeaconStats[psessionEntry->LimRxedBeaconCntDuringHB]++; |
| else |
| pMac->lim.gLimHeartBeatBeaconStats[0]++; |
| |
| /****** |
| * Note: Use this code once you have converted all |
| * limReactivateHeartBeatTimer() calls to |
| * limReactivateTimer() calls. |
| * |
| ******/ |
| //limReactivateTimer(pMac, eLIM_HEART_BEAT_TIMER, psessionEntry); |
| limReactivateHeartBeatTimer(pMac, psessionEntry); |
| |
| // Reset number of beacons received |
| limResetHBPktCount(psessionEntry); |
| return; |
| } |
| if (((psessionEntry->limSystemRole == eLIM_STA_ROLE)||(psessionEntry->limSystemRole == eLIM_BT_AMP_STA_ROLE))&& |
| (psessionEntry->limMlmState == eLIM_MLM_LINK_ESTABLISHED_STATE)) |
| { |
| if (!pMac->sys.gSysEnableLinkMonitorMode) |
| return; |
| |
| /** |
| * Beacon frame not received within heartbeat timeout. |
| */ |
| PELOGW(limLog(pMac, LOGW, FL("Heartbeat Failure\n"));) |
| pMac->lim.gLimHBfailureCntInLinkEstState++; |
| |
| /** |
| * Check if connected on the DFS channel, if not connected on |
| * DFS channel then only send the probe request otherwise tear down the link |
| */ |
| if(!limIsconnectedOnDFSChannel(psessionEntry->currentOperChannel)) |
| { |
| /*** Detected continuous Beacon Misses ***/ |
| psessionEntry->LimHBFailureStatus= eANI_BOOLEAN_TRUE; |
| /** |
| * Send Probe Request frame to AP to see if |
| * it is still around. Wait until certain |
| * timeout for Probe Response from AP. |
| */ |
| PELOGW(limLog(pMac, LOGW, FL("Heart Beat missed from AP. Sending Probe Req\n"));) |
| /* for searching AP, we don't include any additional IE */ |
| limSendProbeReqMgmtFrame(pMac, &psessionEntry->ssId, psessionEntry->bssId, |
| psessionEntry->currentOperChannel,psessionEntry->selfMacAddr, |
| psessionEntry->dot11mode, 0, NULL); |
| } |
| else |
| { |
| /* Connected on DFS channel so should not send the probe request |
| * tear down the link directly */ |
| limTearDownLinkWithAp(pMac, psessionEntry->peSessionId, eSIR_MAC_UNSPEC_FAILURE_REASON); |
| } |
| } |
| else |
| { |
| /** |
| * Heartbeat timer may have timed out |
| * while we're doing background scanning/learning |
| * or in states other than link-established state. |
| * Log error. |
| */ |
| PELOG1(limLog(pMac, LOG1, FL("received heartbeat timeout in state %X\n"), |
| psessionEntry->limMlmState);) |
| limPrintMlmState(pMac, LOG1, psessionEntry->limMlmState); |
| pMac->lim.gLimHBfailureCntInOtherStates++; |
| limReactivateHeartBeatTimer(pMac, psessionEntry); |
| } |
| } /*** limHandleHeartBeatFailure() ***/ |