/* * 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() ***/