| /* |
| * Copyright (c) 2012-2017 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. |
| */ |
| |
| /* |
| * This file was originally distributed by Qualcomm Atheros, Inc. |
| * under proprietary terms before Copyright ownership was assigned |
| * to the Linux Foundation. |
| */ |
| |
| /* |
| * 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 "wni_cfg.h" |
| #include "cfgApi.h" |
| |
| |
| #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 |
| #ifdef WLAN_FEATURE_VOWIFI_11R |
| #include "limFTDefs.h" |
| #endif |
| #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) |
| { |
| |
| } /*** 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 ; |
| |
| if(NULL == pMsg) |
| { |
| PELOGE(limLog(pMac, LOGE,FL("Invalid body pointer in message"));) |
| return; |
| } |
| psessionEntry = pe_find_session_by_sme_session_id(pMac, pMsg->vdev_id); |
| if(NULL == psessionEntry) |
| { |
| limLog(pMac, LOGE, FL("session not found for given sme session")); |
| vos_mem_free(pMsg); |
| return; |
| } |
| |
| switch(pMsg->reasonCode) |
| { |
| case HAL_DEL_STA_REASON_CODE_KEEP_ALIVE: |
| pStaDs = dphLookupAssocId(pMac, pMsg->staId, &pMsg->assocId, |
| &psessionEntry->dph.dphHashTable); |
| |
| if (!pStaDs) { |
| PELOGE(limLog(pMac, LOGE, |
| FL("Skip STA deletion (invalid STA) limSystemRole=%d"), |
| GET_LIM_SYSTEM_ROLE(psessionEntry));) |
| vos_mem_free(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 "), pStaDs->staIndex, pMsg->staId);) |
| vos_mem_free(pMsg); |
| return; |
| } |
| |
| /* |
| * Check if Deauth/Disassoc is triggered from Host. |
| * If mlmState is in some transient state then |
| * don't trigger STA deletion to avoid the race |
| * condition. |
| */ |
| if ((pStaDs && |
| ((pStaDs->mlmStaContext.mlmState != |
| eLIM_MLM_LINK_ESTABLISHED_STATE) && |
| (pStaDs->mlmStaContext.mlmState != |
| eLIM_MLM_WT_ASSOC_CNF_STATE) && |
| (pStaDs->mlmStaContext.mlmState != |
| eLIM_MLM_ASSOCIATED_STATE)))) { |
| PELOGE(limLog(pMac, LOGE, |
| FL("received Del STA context in some transit state(staId: %d, assocId: %d)"), |
| pMsg->staId, pMsg->assocId);) |
| vos_mem_free(pMsg); |
| return; |
| } |
| |
| if (LIM_IS_STA_ROLE(psessionEntry) && !pMsg->is_tdls) { |
| /* |
| * If roaming is in progress, then ignore the STA kick out |
| * and let the connection happen. The roaming_in_progress |
| * flag is set whenever a candidate found indication is |
| * received. It is enabled on the PE session for which |
| * the indication is received. There is really no need to |
| * re-set the flag, since the PE session on which it was |
| * set will be deleted, even if roaming is success or failure. |
| * When roaming is a success, the PE session for AP1 is |
| * deleted. When we get a candidate indication, it would be |
| * on the PE session of the AP1. AP2 to which we are about to |
| * roam will have a new PE session ID.If roaming fails for |
| * any reason, then it will anyways delete the PE session of |
| * of the AP1. |
| */ |
| if (psessionEntry->roaming_in_progress || |
| limIsReassocInProgress(pMac, psessionEntry)) { |
| limLog(pMac, LOGE, |
| FL("roam_progress=%d, reassoc=%d. Not disconnecting"), |
| psessionEntry->roaming_in_progress, |
| limIsReassocInProgress(pMac, psessionEntry)); |
| vos_mem_free(pMsg); |
| return; |
| } |
| pStaDs = dphGetHashEntry(pMac, |
| DPH_STA_HASH_INDEX_PEER, |
| &psessionEntry->dph.dphHashTable); |
| if (NULL == pStaDs) { |
| limLog(pMac, LOGE, FL("Dph entry not found.")); |
| vos_mem_free(pMsg); |
| return; |
| } |
| pStaDs->del_sta_ctx_rssi = pMsg->rssi; |
| limSendDeauthMgmtFrame(pMac, |
| eSIR_MAC_DISASSOC_DUE_TO_INACTIVITY_REASON, |
| pMsg->addr2, psessionEntry, FALSE); |
| limTearDownLinkWithAp(pMac, psessionEntry->peSessionId, |
| eSIR_MAC_DISASSOC_DUE_TO_INACTIVITY_REASON); |
| /* only break for STA role (non TDLS) */ |
| break; |
| } |
| |
| limLog(pMac, LOGE, FL("Deleting sta: staId %d, reasonCode %d"), |
| pMsg->staId, pMsg->reasonCode); |
| if (LIM_IS_IBSS_ROLE(psessionEntry)) { |
| vos_mem_free(pMsg); |
| return; |
| } |
| if (LIM_IS_BT_AMP_AP_ROLE(psessionEntry) || |
| LIM_IS_AP_ROLE(psessionEntry)) { |
| PELOG1(limLog(pMac, LOG1, FL("SAP:lim Delete Station Context (staId: %d, assocId: %d) "), |
| pMsg->staId, pMsg->assocId);) |
| limSendDisassocMgmtFrame(pMac, |
| eSIR_MAC_DISASSOC_DUE_TO_INACTIVITY_REASON, |
| pStaDs->staAddr, psessionEntry, FALSE); |
| limTriggerSTAdeletion(pMac, pStaDs, psessionEntry); |
| } |
| #ifdef FEATURE_WLAN_TDLS |
| else |
| { |
| if (LIM_IS_STA_ROLE(psessionEntry) && |
| STA_ENTRY_TDLS_PEER == pStaDs->staType) { |
| //TeardownLink with PEER |
| //Reason code HAL_DEL_STA_REASON_CODE_KEEP_ALIVE means |
| //eSIR_MAC_TDLS_TEARDOWN_PEER_UNREACHABLE |
| limSendSmeTDLSDelStaInd(pMac, pStaDs, psessionEntry, |
| eSIR_MAC_TDLS_TEARDOWN_PEER_UNREACHABLE); |
| } |
| } |
| #endif |
| break; |
| |
| case HAL_DEL_STA_REASON_CODE_UNKNOWN_A2: |
| PELOGE(limLog(pMac, LOGE, FL(" Deleting Unknown station "));) |
| 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 "));) |
| break; |
| |
| } |
| vos_mem_free(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) |
| { |
| tLimMlmDisassocInd mlmDisassocInd; |
| |
| if (!pStaDs) |
| { |
| PELOGW(limLog(pMac, LOGW, FL("Skip STA deletion (invalid STA)"));) |
| return; |
| } |
| |
| if ((pStaDs->mlmStaContext.mlmState == eLIM_MLM_WT_DEL_STA_RSP_STATE) || |
| (pStaDs->mlmStaContext.mlmState == eLIM_MLM_WT_DEL_BSS_RSP_STATE) || |
| pStaDs->sta_deletion_in_progress) { |
| /* Already in the process of deleting context for the peer */ |
| limLog(pMac, LOG1, |
| FL("Deletion is in progress (%d) for peer:%pK in mlmState %d"), |
| pStaDs->sta_deletion_in_progress, pStaDs->staAddr, |
| pStaDs->mlmStaContext.mlmState); |
| return; |
| } |
| pStaDs->sta_deletion_in_progress = true; |
| pStaDs->mlmStaContext.disassocReason = |
| eSIR_MAC_DISASSOC_DUE_TO_INACTIVITY_REASON; |
| pStaDs->mlmStaContext.cleanupTrigger = eLIM_LINK_MONITORING_DISASSOC; |
| vos_mem_copy(&mlmDisassocInd.peerMacAddr, pStaDs->staAddr, |
| sizeof(tSirMacAddr)); |
| mlmDisassocInd.reasonCode = eSIR_MAC_DISASSOC_DUE_TO_INACTIVITY_REASON; |
| mlmDisassocInd.disassocTrigger = eLIM_LINK_MONITORING_DISASSOC; |
| |
| /* Update PE session Id */ |
| mlmDisassocInd.sessionId = psessionEntry->peSessionId; |
| limPostSmeMessage(pMac, LIM_MLM_DISASSOC_IND, |
| (tANI_U32 *) &mlmDisassocInd); |
| // Issue Disassoc Indication to SME. |
| limSendSmeDisassocInd(pMac, pStaDs, psessionEntry); |
| } /*** 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")); |
| return; |
| } |
| /** |
| * Heart beat failed for upto threshold value |
| * and AP did not respond for Probe request. |
| * Trigger link tear down. |
| */ |
| if(pMac->psOffloadEnabled) |
| psessionEntry->pmmOffloadInfo.bcnmiss = FALSE; |
| else |
| pMac->pmm.inMissedBeaconScenario = FALSE; |
| |
| limLog(pMac, LOGW, |
| FL("No ProbeRsp from AP after HB failure. Tearing down link")); |
| |
| // 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; |
| |
| #ifdef FEATURE_WLAN_TDLS |
| /* Delete all TDLS peers connected before leaving BSS*/ |
| limDeleteTDLSPeers(pMac, psessionEntry); |
| #endif |
| |
| pStaDs->mlmStaContext.disassocReason = reasonCode; |
| pStaDs->mlmStaContext.cleanupTrigger = eLIM_LINK_MONITORING_DEAUTH; |
| |
| /// Issue Deauth Indication to SME. |
| vos_mem_copy((tANI_U8 *) &mlmDeauthInd.peerMacAddr, |
| pStaDs->staAddr, |
| sizeof(tSirMacAddr)); |
| |
| /* |
| * if sendDeauthBeforeCon is enabled and reasoncode is |
| * Beacon Missed Store the MAC of AP in the flip flop |
| * buffer. This MAC will be used to send Deauth before |
| * connection, if we connect to same AP after HB failure. |
| */ |
| if (pMac->roam.configParam.sendDeauthBeforeCon && |
| eSIR_BEACON_MISSED == reasonCode) |
| { |
| int apCount = pMac->lim.gLimHeartBeatApMacIndex; |
| |
| if (pMac->lim.gLimHeartBeatApMacIndex) |
| pMac->lim.gLimHeartBeatApMacIndex = 0; |
| else |
| pMac->lim.gLimHeartBeatApMacIndex = 1; |
| |
| limLog(pMac, LOGE, FL("HB Failure on MAC " |
| MAC_ADDRESS_STR" Store it on Index %d"), |
| MAC_ADDR_ARRAY(pStaDs->staAddr),apCount); |
| |
| sirCopyMacAddr(pMac->lim.gLimHeartBeatApMac[apCount], |
| pStaDs->staAddr); |
| } |
| |
| mlmDeauthInd.reasonCode = (tANI_U8) pStaDs->mlmStaContext.disassocReason; |
| mlmDeauthInd.deauthTrigger = pStaDs->mlmStaContext.cleanupTrigger; |
| |
| if (GET_LIM_SYSTEM_ROLE(psessionEntry) == eLIM_STA_ROLE) |
| limPostSmeMessage(pMac, LIM_MLM_DEAUTH_IND, |
| (tANI_U32 *) &mlmDeauthInd); |
| |
| limSendSmeDeauthInd(pMac, pStaDs, psessionEntry); |
| limReInitScanResults(pMac); |
| } |
| } /*** 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(!pMac->psOffloadEnabled) |
| { |
| 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; |
| |
| if ((LIM_IS_STA_ROLE(psessionEntry) || |
| LIM_IS_BT_AMP_STA_ROLE(psessionEntry)) && |
| (psessionEntry->limMlmState == eLIM_MLM_LINK_ESTABLISHED_STATE) && |
| (psessionEntry->limSmeState != eLIM_SME_WT_DISASSOC_STATE) && |
| (psessionEntry->limSmeState != eLIM_SME_WT_DEAUTH_STATE)) |
| { |
| if (!pMac->sys.gSysEnableLinkMonitorMode) |
| return; |
| /* Ignore HB if channel switch is in progress */ |
| if (psessionEntry->gLimSpecMgmt.dot11hChanSwState == |
| eLIM_11H_CHANSW_RUNNING) { |
| limLog(pMac, LOGE, |
| FL("Ignore Heartbeat failure as Channel switch is in progress")); |
| pMac->pmm.inMissedBeaconScenario = false; |
| return; |
| } |
| |
| /** |
| * Beacon frame not received within heartbeat timeout. |
| */ |
| limLog(pMac, LOGW, FL("Heartbeat Failure")); |
| 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; |
| |
| /*Reset the HB packet count before sending probe*/ |
| limResetHBPktCount(psessionEntry); |
| /** |
| * 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"));) |
| /* 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 |
| { |
| PELOGW(limLog(pMac, LOGW, |
| FL("Heart Beat missed from AP on DFS chanel moving to passive"));) |
| if (psessionEntry->currentOperChannel < SIR_MAX_24G_5G_CHANNEL_RANGE){ |
| limCovertChannelScanType(pMac, psessionEntry->currentOperChannel, false); |
| pMac->lim.dfschannelList.timeStamp[psessionEntry->currentOperChannel] = 0; |
| } |
| /* Connected on DFS channel so should not send the probe request |
| * tear down the link directly */ |
| limTearDownLinkWithAp(pMac, psessionEntry->peSessionId, |
| eSIR_BEACON_MISSED); |
| } |
| } |
| 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"), |
| psessionEntry->limMlmState);) |
| limPrintMlmState(pMac, LOG1, psessionEntry->limMlmState); |
| pMac->lim.gLimHBfailureCntInOtherStates++; |
| limReactivateHeartBeatTimer(pMac, psessionEntry); |
| } |
| } /*** limHandleHeartBeatFailure() ***/ |
