| /* |
| * Copyright (c) 2011-2015 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 limProcessBeaconFrame.cc contains the code |
| * for processing Received Beacon Frame. |
| * Author: Chandra Modumudi |
| * Date: 03/01/02 |
| * History:- |
| * Date Modified by Modification Information |
| * -------------------------------------------------------------------- |
| * |
| */ |
| |
| #include "wniCfg.h" |
| #include "aniGlobal.h" |
| #include "cfgApi.h" |
| #include "schApi.h" |
| #include "utilsApi.h" |
| #include "limTypes.h" |
| #include "limUtils.h" |
| #include "limAssocUtils.h" |
| #include "limPropExtsUtils.h" |
| #include "limSerDesUtils.h" |
| |
| /** |
| * limProcessBeaconFrame |
| * |
| *FUNCTION: |
| * This function is called by limProcessMessageQueue() upon Beacon |
| * frame reception. |
| * |
| *LOGIC: |
| * |
| *ASSUMPTIONS: |
| * |
| *NOTE: |
| * 1. Beacons received in 'normal' state in IBSS are handled by |
| * Beacon Processing module. |
| * |
| * @param pMac - Pointer to Global MAC structure |
| * @param *pRxPacketInfo - A pointer to RX packet info structure |
| * @return None |
| */ |
| |
| void |
| limProcessBeaconFrame(tpAniSirGlobal pMac, tANI_U8 *pRxPacketInfo,tpPESession psessionEntry) |
| { |
| tpSirMacMgmtHdr pHdr; |
| tSchBeaconStruct *pBeacon; |
| |
| pMac->lim.gLimNumBeaconsRcvd++; |
| |
| /* here is it required to increment session specific heartBeat beacon counter */ |
| |
| |
| pHdr = WDA_GET_RX_MAC_HEADER(pRxPacketInfo); |
| |
| |
| limLog(pMac, LOG2, FL("Received Beacon frame with length=%d from "), |
| WDA_GET_RX_MPDU_LEN(pRxPacketInfo)); |
| limPrintMacAddr(pMac, pHdr->sa, LOG2); |
| |
| if (!pMac->fScanOffload) |
| { |
| if (limDeactivateMinChannelTimerDuringScan(pMac) != eSIR_SUCCESS) |
| return; |
| } |
| |
| /** |
| * Expect Beacon only when |
| * 1. STA is in Scan mode waiting for Beacon/Probe response or |
| * 2. STA is waiting for Beacon/Probe Respose Frame |
| * to announce join success. |
| * 3. STA/AP is in Learn mode |
| */ |
| if ((pMac->lim.gLimMlmState == eLIM_MLM_WT_PROBE_RESP_STATE) || |
| (pMac->lim.gLimMlmState == eLIM_MLM_PASSIVE_SCAN_STATE) || |
| (pMac->lim.gLimMlmState == eLIM_MLM_LEARN_STATE) || |
| (psessionEntry->limMlmState == eLIM_MLM_WT_JOIN_BEACON_STATE) |
| || pMac->fScanOffload |
| ) |
| { |
| pBeacon = vos_mem_vmalloc(sizeof(tSchBeaconStruct)); |
| if ( NULL == pBeacon ) |
| { |
| limLog(pMac, LOGE, FL("Unable to allocate memory in limProcessBeaconFrame") ); |
| return; |
| } |
| |
| // Parse received Beacon |
| if (sirConvertBeaconFrame2Struct(pMac, (tANI_U8 *) pRxPacketInfo, |
| pBeacon) != eSIR_SUCCESS) |
| { |
| // Received wrongly formatted/invalid Beacon. |
| // Ignore it and move on. |
| limLog(pMac, LOGW, |
| FL("Received invalid Beacon in state %d"), |
| psessionEntry->limMlmState); |
| limPrintMlmState(pMac, LOGW, psessionEntry->limMlmState); |
| if ((!psessionEntry->currentBssBeaconCnt) && |
| (sirCompareMacAddr( psessionEntry->bssId, pHdr->sa))) |
| limParseBeaconForTim(pMac, (tANI_U8 *) pRxPacketInfo, psessionEntry); |
| |
| vos_mem_vfree(pBeacon); |
| return; |
| } |
| /*during scanning, when any session is active, and beacon/Pr belongs to |
| one of the session, fill up the following, TBD - HB couter */ |
| if ((!psessionEntry->lastBeaconDtimPeriod) && |
| (sirCompareMacAddr( psessionEntry->bssId, pBeacon->bssid))) |
| { |
| vos_mem_copy(( tANI_U8* )&psessionEntry->lastBeaconTimeStamp, |
| ( tANI_U8* )pBeacon->timeStamp, sizeof(tANI_U64) ); |
| psessionEntry->lastBeaconDtimCount = pBeacon->tim.dtimCount; |
| psessionEntry->lastBeaconDtimPeriod= pBeacon->tim.dtimPeriod; |
| psessionEntry->currentBssBeaconCnt++; |
| } |
| |
| MTRACE(macTrace(pMac, TRACE_CODE_RX_MGMT_TSF, 0, pBeacon->timeStamp[0]);) |
| MTRACE(macTrace(pMac, TRACE_CODE_RX_MGMT_TSF, 0, pBeacon->timeStamp[1]);) |
| |
| if (pMac->fScanOffload) |
| { |
| limCheckAndAddBssDescription(pMac, pBeacon, pRxPacketInfo, |
| eANI_BOOLEAN_FALSE, eANI_BOOLEAN_TRUE); |
| |
| } |
| |
| if ((pMac->lim.gLimMlmState == eLIM_MLM_WT_PROBE_RESP_STATE) || |
| (pMac->lim.gLimMlmState == eLIM_MLM_PASSIVE_SCAN_STATE)) |
| { |
| //If we are scanning for P2P, only accept probe rsp |
| if((pMac->lim.gLimHalScanState != eLIM_HAL_SCANNING_STATE) || (NULL == pMac->lim.gpLimMlmScanReq) |
| || !pMac->lim.gpLimMlmScanReq->p2pSearch ) |
| { |
| limCheckAndAddBssDescription(pMac, pBeacon, pRxPacketInfo, |
| ((pMac->lim.gLimHalScanState == eLIM_HAL_SCANNING_STATE) ? eANI_BOOLEAN_TRUE : eANI_BOOLEAN_FALSE), |
| eANI_BOOLEAN_FALSE); |
| |
| } |
| /* Calling dfsChannelList which will convert DFS channel |
| * to Active channel for x secs if this channel is DFS channel */ |
| limSetDFSChannelList(pMac, pBeacon->channelNumber, |
| &pMac->lim.dfschannelList); |
| } |
| else if (pMac->lim.gLimMlmState == eLIM_MLM_LEARN_STATE) |
| { |
| } |
| else if (psessionEntry->limMlmState == eLIM_MLM_WT_JOIN_BEACON_STATE) |
| { |
| if( psessionEntry->beacon != NULL ) |
| { |
| vos_mem_free(psessionEntry->beacon); |
| psessionEntry->beacon = NULL; |
| } |
| psessionEntry->bcnLen = WDA_GET_RX_PAYLOAD_LEN(pRxPacketInfo); |
| psessionEntry->beacon = vos_mem_malloc(psessionEntry->bcnLen); |
| if ( NULL == psessionEntry->beacon ) |
| { |
| PELOGE(limLog(pMac, LOGE, FL("Unable to allocate memory to store beacon"));) |
| } |
| else |
| { |
| //Store the Beacon/ProbeRsp. This is sent to csr/hdd in join cnf response. |
| vos_mem_copy(psessionEntry->beacon, WDA_GET_RX_MPDU_DATA(pRxPacketInfo), |
| psessionEntry->bcnLen); |
| |
| } |
| |
| // STA in WT_JOIN_BEACON_STATE (IBSS) |
| limCheckAndAnnounceJoinSuccess(pMac, pBeacon, pHdr,psessionEntry); |
| } // if (pMac->lim.gLimMlmState == eLIM_MLM_WT_PROBE_RESP_STATE) |
| vos_mem_vfree(pBeacon); |
| } // if ((pMac->lim.gLimMlmState == eLIM_MLM_WT_PROBE_RESP_STATE) || ... |
| else |
| { |
| // Ignore Beacon frame in all other states |
| if (psessionEntry->limMlmState == eLIM_MLM_JOINED_STATE || |
| psessionEntry->limMlmState == eLIM_MLM_BSS_STARTED_STATE || |
| psessionEntry->limMlmState == eLIM_MLM_WT_AUTH_FRAME2_STATE || |
| psessionEntry->limMlmState == eLIM_MLM_WT_AUTH_FRAME3_STATE || |
| psessionEntry->limMlmState == eLIM_MLM_WT_AUTH_FRAME4_STATE || |
| psessionEntry->limMlmState == eLIM_MLM_AUTH_RSP_TIMEOUT_STATE || |
| psessionEntry->limMlmState == eLIM_MLM_AUTHENTICATED_STATE || |
| psessionEntry->limMlmState == eLIM_MLM_WT_ASSOC_RSP_STATE || |
| psessionEntry->limMlmState == eLIM_MLM_WT_REASSOC_RSP_STATE || |
| psessionEntry->limMlmState == eLIM_MLM_ASSOCIATED_STATE || |
| psessionEntry->limMlmState == eLIM_MLM_REASSOCIATED_STATE || |
| psessionEntry->limMlmState == eLIM_MLM_WT_ASSOC_CNF_STATE || |
| limIsReassocInProgress(pMac,psessionEntry)) { |
| // nothing unexpected about beacon in these states |
| pMac->lim.gLimNumBeaconsIgnored++; |
| } |
| else |
| { |
| limLog(pMac, LOG1, FL("Received Beacon in unexpected state %d"), |
| psessionEntry->limMlmState); |
| limPrintMlmState(pMac, LOG1, psessionEntry->limMlmState); |
| #ifdef WLAN_DEBUG |
| pMac->lim.gLimUnexpBcnCnt++; |
| #endif |
| } |
| } |
| |
| return; |
| } /*** end limProcessBeaconFrame() ***/ |
| |
| |
| /**--------------------------------------------------------------- |
| \fn limProcessBeaconFrameNoSession |
| \brief This function is called by limProcessMessageQueue() |
| \ upon Beacon reception. |
| \ |
| \param pMac |
| \param *pRxPacketInfo - A pointer to Rx packet info structure |
| \return None |
| ------------------------------------------------------------------*/ |
| void |
| limProcessBeaconFrameNoSession(tpAniSirGlobal pMac, tANI_U8 *pRxPacketInfo) |
| { |
| tpSirMacMgmtHdr pHdr; |
| tSchBeaconStruct *pBeacon; |
| |
| pMac->lim.gLimNumBeaconsRcvd++; |
| pHdr = WDA_GET_RX_MAC_HEADER(pRxPacketInfo); |
| |
| limLog(pMac, LOG2, FL("Received Beacon frame with length=%d from "), |
| WDA_GET_RX_MPDU_LEN(pRxPacketInfo)); |
| limPrintMacAddr(pMac, pHdr->sa, LOG2); |
| |
| if (!pMac->fScanOffload) |
| { |
| if (limDeactivateMinChannelTimerDuringScan(pMac) != eSIR_SUCCESS) |
| return; |
| } |
| |
| /** |
| * No session has been established. Expect Beacon only when |
| * 1. STA is in Scan mode waiting for Beacon/Probe response or |
| * 2. STA/AP is in Learn mode |
| */ |
| if ((pMac->lim.gLimMlmState == eLIM_MLM_WT_PROBE_RESP_STATE) || |
| (pMac->lim.gLimMlmState == eLIM_MLM_PASSIVE_SCAN_STATE) || |
| (pMac->lim.gLimMlmState == eLIM_MLM_LEARN_STATE)) |
| { |
| pBeacon = vos_mem_vmalloc(sizeof(tSchBeaconStruct)); |
| if ( NULL == pBeacon ) |
| { |
| limLog(pMac, LOGE, FL("Unable to allocate memory in limProcessBeaconFrameNoSession") ); |
| return; |
| } |
| |
| if (sirConvertBeaconFrame2Struct(pMac, (tANI_U8 *) pRxPacketInfo, pBeacon) != eSIR_SUCCESS) |
| { |
| // Received wrongly formatted/invalid Beacon. Ignore and move on. |
| limLog(pMac, LOGW, FL("Received invalid Beacon in global MLM state %d"), pMac->lim.gLimMlmState); |
| limPrintMlmState(pMac, LOGW, pMac->lim.gLimMlmState); |
| vos_mem_vfree(pBeacon); |
| return; |
| } |
| |
| if ( (pMac->lim.gLimMlmState == eLIM_MLM_WT_PROBE_RESP_STATE) || |
| (pMac->lim.gLimMlmState == eLIM_MLM_PASSIVE_SCAN_STATE) ) |
| { |
| //If we are scanning for P2P, only accept probe rsp |
| if((pMac->lim.gLimHalScanState != eLIM_HAL_SCANNING_STATE) || (NULL == pMac->lim.gpLimMlmScanReq) |
| || !pMac->lim.gpLimMlmScanReq->p2pSearch ) |
| { |
| limCheckAndAddBssDescription(pMac, pBeacon, pRxPacketInfo, eANI_BOOLEAN_TRUE, eANI_BOOLEAN_FALSE); |
| } |
| /* Calling dfsChannelList which will convert DFS channel |
| * to Active channel for x secs if this channel is DFS channel */ |
| limSetDFSChannelList(pMac, pBeacon->channelNumber, |
| &pMac->lim.dfschannelList); |
| } |
| else if (pMac->lim.gLimMlmState == eLIM_MLM_LEARN_STATE) |
| { |
| } // end of eLIM_MLM_LEARN_STATE) |
| vos_mem_vfree(pBeacon); |
| } // end of (eLIM_MLM_WT_PROBE_RESP_STATE) || (eLIM_MLM_PASSIVE_SCAN_STATE) |
| else |
| { |
| limLog(pMac, LOG1, FL("Rcvd Beacon in unexpected MLM state %s (%d)"), |
| limMlmStateStr(pMac->lim.gLimMlmState), pMac->lim.gLimMlmState); |
| limPrintMlmState(pMac, LOG1, pMac->lim.gLimMlmState); |
| #ifdef WLAN_DEBUG |
| pMac->lim.gLimUnexpBcnCnt++; |
| #endif |
| } |
| |
| return; |
| } /*** end limProcessBeaconFrameNoSession() ***/ |
| |