介绍主动扫描，被动扫描以及连接的wifi的扫描过程
参考文档 《802.11无线网络权威指南》
《80_Y0513_1_QCA_WCN36X0_SOFTWARE_ARCHITECTURE.pdf》(高通文档)
被动扫描（passive scanning） 可以节省电池的电力，因为不需要传送任何信号。在被动
主动扫描（active scanning） 在主动扫描中，工作站扮演比较积极的角色。在每个频道上，工作站
1.跳至某个频道，然后等候来讯显示，或者等到ProbeDelay 计时器逾时。如果在这个频道收得到帧，就证明该频道有人使用，因此可以加以探
2.利用基本的DCF 访问程序取得介质使用权，然后送出一个Probe Request 帧。
3.至少等候一段最短的频道时间（即MinChannelTime）。
a.如果介质并不忙碌，表示没有网络存在。因此可以跳至下个频道。
b.如果在MinChannelTime 这段期间介质非常忙碌，就继续等候一段时间，直 到
当网络收到搜寻其所属之延伸服务组合的Probe Request（探查要求），就会发出Probe
probe request两种情况的不同 指定SSID
SSID为空(broadcast)
kernel扫描日志 主动扫描 18 :49 :39 .864678 [18:49:39.858008] [00000016B70D009C] [VosMC] wlan: [I :VOS] VosMCThread: Servicing the VOS PE MC Message queue
18 :49 :39 .864704 [18:49:39.858079] [00000016B70D05E4] [VosMC] wlan: [I :PE ] limContinuePostChannelScan: 477 : Mac Addr da:a1:19 :53 :b9:f8 used in sending ProbeReq number 0 , for SSID on channel: 2
18 :49 :39 .864726 [18:49:39.858146] [00000016B70D0AEA] [VosMC] wlan: [I :VOS] VPKT [779] : [0000000000000000] Packet allocated, type 0 [TX_802_11_MGMT]
18 :49 :39 .864748 [18:49:39.858193] [00000016B70D0E76] [VosMC] wlan: [IH:WDA] Tx Mgmt Frame Subtype: 4 alloc(0000000000000000 ) txBdToken = 0
18 :49 :39 .864770 [18:49:39.858221] [00000016B70D108F] [VosMC] wlan: [I :TL ] TL: using self sta addr to get staidx for spoofed probe req 00 :0a:f5:32 :b1:50
18 :49 :39 .864792 [18:49:39.858237] [00000016B70D11BE] [VosMC] wlan: [IL:TL ] WLAN TL: fProtMgmtFrame:0
18 :49 :39 .864814 [18:49:39.858256] [00000016B70D132A] [VosMC] wlan: [IL:TL ] WLAN TL: Dump TX meta info: txFlags:2 , qosEnabled:0 , ac:0 , isEapol:0 , fdisableFrmXlt:1 , frmType:0
18 :49 :39 .864836 [18:49:39.858269] [00000016B70D142E] [VosMC] wlan: [IH:TL ] Serializing WDA TX Start Xmit event
18 :49 :39 .866943 [18:49:39.858720] [00000016B70D360E] [VosTX] wlan: [I :VOS] VosTXThread: Servicing the VOS TL TX Message queue
18 :49 :39 .866992 [18:49:39.858916] [00000016B70D44B8] [VosTX] wlan: [I :WDI] WDTS_TxPacketComplete: Management frame Tx complete status: 0
18 :49 :39 .867015 [18:49:39.858934] [00000016B70D4604] [VosTX] wlan: [I :WDA] Enter:WDA_TxComplete
18 :49 :39 .867037 [18:49:39.858955] [00000016B70D4795] [VosTX] wlan: [I :VOS] VPKT [1428] : [0000000000000000] Packet returned, type 0 [TX_802_11_MGMT]
18 :49 :39 .867059 [18:49:39.859423] [00000016B70D6AB7] [VosMC] wlan: [I :SYS] tx_timer_deactivate() called for timer MIN CHANNEL TIMEOUT
18 :49 :39 .867098 [18:49:39.859437] [00000016B70D6BBD] [VosMC] wlan: [IH:VOS] vos_timer_stop: Timer Addr inside voss_stop : 0x0000000000000000
18 :49 :39 .867120 [18:49:39.859450] [00000016B70D6CBE] [VosMC] wlan: [IH:VOS] vos_timer_stop: Cannot stop timer in state = 19
18 :49 :39 .867141 [18:49:39.859466] [00000016B70D6DEF] [VosMC] wlan: [I :SYS] Timer MIN CHANNEL TIMEOUT being activated
18 :49 :39 .867180 [18:49:39.859478] [00000016B70D6EDD] [VosMC] wlan: [IH:VOS] Timer Addr inside voss_start : 0x0000000000000000
18 :49 :39 .867201 [18:49:39.859497] [00000016B70D7048] [VosMC] wlan: [I :SYS] Timer MIN CHANNEL TIMEOUT now activated
18 :49 :39 .867240 [18:49:39.859509] [00000016B70D7124] [VosMC] wlan: [I :SYS] tx_timer_deactivate() called for timer MAX CHANNEL TIMEOUT
18 :49 :39 .867279 [18:49:39.859520] [00000016B70D7202] [VosMC] wlan: [IH:VOS] vos_timer_stop: Timer Addr inside voss_stop : 0x0000000000000000
18 :49 :39 .867301 [18:49:39.859532] [00000016B70D72E9] [VosMC] wlan: [IH:VOS] vos_timer_stop: Cannot stop timer in state = 19
18 :49 :39 .867323 [18:49:39.859543] [00000016B70D73BF] [VosMC] wlan: [I :SYS] Timer MAX CHANNEL TIMEOUT being activated
18 :49 :39 .867362 [18:49:39.859554] [00000016B70D748A] [VosMC] wlan: [IH:VOS] Timer Addr inside voss_start : 0x0000000000000000
18 :49 :39 .867405 [18:49:39.859567] [00000016B70D757E] [VosMC] wlan: [I :SYS] Timer MAX CHANNEL TIMEOUT now activated
18 :49 :39 .867446 [18:49:39.859578] [00000016B70D765B] [VosMC] wlan: [I :SYS] tx_timer_deactivate() called for timer Periodic Probe Request Timer
18 :49 :39 .867485 [18:49:39.859589] [00000016B70D7731] [VosMC] wlan: [IH:VOS] vos_timer_stop: Timer Addr inside voss_stop : 0x0000000000000000
18 :49 :39 .867506 [18:49:39.859601] [00000016B70D7816] [VosMC] wlan: [IH:VOS] vos_timer_stop: Cannot stop timer in state = 19
18 :49 :39 .867528 [18:49:39.859614] [00000016B70D7903] [VosMC] wlan: [I :SYS] Timer Periodic Probe Request Timer being activated // 扫描请求定时器
18 :49 :39 .867566 [18:49:39.859624] [00000016B70D79C9] [VosMC] wlan: [IH:VOS] Timer Addr inside voss_start : 0x0000000000000000
18 :49 :39 .867587 [18:49:39.859638] [00000016B70D7AD6] [VosMC] wlan: [I :SYS] Timer Periodic Probe Request Timer now activated
18 :49 :39 .867626 [18:49:39.861202] [00000016B70DF068] [cnss_] wlan: [I :HDD] __wlan_hdd_cfg80211_get_wifi_info: 6759 : Rcvd req for FW version FW version is CNSS-PR-4 -0 -509 -158621 -1
18 :49 :39 .867647 [18:49:39.861722] [00000016B70E1739] [swapp] wlan: [I :VOS] TIMER callback: running on MC thread
18 :49 :39 .867668 [18:49:39.861831] [00000016B70E1F55] [VosMC] wlan: [I :VOS] VosMCThread: Servicing the VOS SYS MC Message queue
18 :49 :39 .867689 [18:49:39.861850] [00000016B70E20B7] [VosMC] wlan: [I :SYS] Timer Periodic Probe Request Timer triggered // 超时处理
18 :49 :39 .867711 [18:49:39.861874] [00000016B70E2291] [VosMC] wlan: [I :VOS] VosMCThread: Servicing the VOS PE MC Message queue
18 :49 :39 .867733 [18:49:39.861917] [00000016B70E25C3] [VosMC] wlan: [I :PE ] limProcessPeriodicProbeReqTimer: 4237 : Mac Addr used in Probe Req is :da:a1:19 :53 :b9:f8
18 :49 :39 .867755 [18:49:39.861994] [00000016B70E2B8E] [VosMC] wlan: [I :VOS] VPKT [779] : [0000000000000000] Packet allocated, type 0 [TX_802_11_MGMT]
18 :49 :39 .867776 [18:49:39.862042] [00000016B70E2F1F] [VosMC] wlan: [IH:WDA] Tx Mgmt Frame Subtype: 4 alloc(0000000000000000 ) txBdToken = 0
18 :49 :39 .867799 [18:49:39.862070] [00000016B70E3141] [VosMC] wlan: [I :TL ] TL: using self sta addr to get staidx for spoofed probe req 00 :0a:f5:32 :b1:50
18 :49 :39 .867820 [18:49:39.862086] [00000016B70E3278] [VosMC] wlan: [IL:TL ] WLAN TL: fProtMgmtFrame:0
18 :49 :39 .867842 [18:49:39.862105] [00000016B70E33DB] [VosMC] wlan: [IL:TL ] WLAN TL: Dump TX meta info: txFlags:2 , qosEnabled:0 , ac:0 , isEapol:0 , fdisableFrmXlt:1 , frmType:0
18 :49 :39 .867863 [18:49:39.862118] [00000016B70E34DB] [VosMC] wlan: [IH:TL ] Serializing WDA TX Start Xmit event
18 :49 :39 .867884 [18:49:39.862200] [00000016B70E3AFD] [VosTX] wlan: [I :VOS] VosTXThread: Servicing the VOS TL TX Message queue
18 :49 :39 .875713 [18:49:39.862463] [00000016B70E4EBF] [VosTX] wlan: [I :WDI] WDTS_TxPacketComplete: Management frame Tx complete status: 0
18 :49 :39 .875783 [18:49:39.862521] [00000016B70E5313] [VosTX] wlan: [I :WDA] Enter:WDA_TxComplete
18 :49 :39 .875807 [18:49:39.862545] [00000016B70E54D5] [VosTX] wlan: [I :VOS] VPKT [1428] : [0000000000000000] Packet returned, type 0 [TX_802_11_MGMT]
18 :49 :39 .875829 [18:49:39.863277] [00000016B70E8BD9] [VosMC] wlan: [I :SYS] Timer Periodic Probe Request Timer being activated
18 :49 :39 .875868 [18:49:39.863295] [00000016B70E8D1A] [VosMC] wlan: [IH:VOS] Timer Addr inside voss_start : 0x0000000000000000
18 :49 :39 .875890 [18:49:39.863315] [00000016B70E8E94] [VosMC] wlan: [I :SYS] Timer Periodic Probe Request Timer now activated
18 :49 :39 .875929 [18:49:39.863568] [00000016B70EA19D] [VosRX] wlan: [I :VOS] VPKT [779] : [0000000000000000] Packet allocated, type 3 [RX_RAW]
18 :49 :39 .875951 [18:49:39.864074] [00000016B70EC78E] [VosMC] wlan: [I :VOS] VosMCThread: Servicing the VOS PE MC Message queue
18 :49 :39 .875974 [18:49:39.864119] [00000016B70ECAE9] [VosMC] wlan: [I :PE ] limHandle80211Frames: 821 : RX MGMT - Type 0 , SubType 5 ,Seq.no 1927 , Source mac-addr a0:04 :60 :8e:cf:8b被动扫描 13 :51 :17 .028054 [13:51:16.916323] [0000000114D926EF] [VosMC] wlan: [I :VOS] VosMCThread: Servicing the VOS PE MC Message queue
13 :51 :17 .028076 [13:51:16.916373] [0000000114D92AC0] [VosMC] wlan: [I :PE ] limContinueChannelScan: 1390 : Current Channel to be scanned is 64
13 :51 :17 .028099 [13:51:16.916372] [0000000114D92AB3] [cnss_] wlan: [I :HDD] __wlan_hdd_cfg80211_get_wifi_info: 6759 : Rcvd req for FW version FW version is CNSS-PR-4 -0 -509 -158621 -1
13 :51 :17 .028122 [13:51:16.916407] [0000000114D92D3D] [VosMC] wlan: [I :VOS] VosMCThread: Servicing the VOS WDA MC Message queue
13 :51 :17 .028144 [13:51:16.916423] [0000000114D92E71] [VosMC] wlan: [IL:WDA] =========> WDA_McProcessMsg msgType: 1037
13 :51 :17 .029844 [13:51:16.916450] [0000000114D93077] [VosMC] wlan: [I :WDA] ------> WDA_ProcessStartScanReq
13 :51 :17 .029880 [13:51:16.916557] [0000000114D9387D] [VosMC] wlan: [IH:VOS] Timer Addr inside voss_start : 0x0000000000000000
13 :51 :17 .029903 [13:51:16.923382] [0000000114DB38AE] [swapp] wlan: [I :VOS] TIMER callback: running on MC thread
13 :51 :17 .029926 [13:51:16.923894] [0000000114DB5ECB] [VosMC] wlan: [I :VOS] VosMCThread: Servicing the VOS SYS MC Message queue
13 :51 :17 .029971 [13:51:16.923929] [0000000114DB6168] [VosMC] wlan: [IH:VOS] Timer Addr inside voss_start : 0x0000000000000000
13 :51 :17 .029996 [13:51:16.927976] [0000000114DC9127] [VosMC] wlan: [IH:VOS] vos_timer_stop: Timer Addr inside voss_stop : 0x0000000000000000
13 :51 :17 .030018 [13:51:16.928019] [0000000114DC9431] [VosMC] wlan: [I :WDA] <------ WDA_StartScanReqCallback
13 :51 :17 .030040 [13:51:16.928112] [0000000114DC9B29] [VosMC] wlan: [IH:VOS] vos_list_remove_front: list empty
13 :51 :17 .030062 [13:51:16.928147] [0000000114DC9DC0] [VosMC] wlan: [I :VOS] VosMCThread: Servicing the VOS PE MC Message queue
13 :51 :17 .030085 [13:51:16.928207] [0000000114DCA240] [VosMC] wlan: [I :PE ] limContinuePostChannelScan: 575 : START PASSIVE Scan chan 64
13 :51 :17 .030107 [13:51:16.928220] [0000000114DCA339] [VosMC] wlan: [I :SYS] tx_timer_deactivate() called for timer MAX CHANNEL TIMEOUT
13 :51 :17 .030148 [13:51:16.928232] [0000000114DCA41D] [VosMC] wlan: [IH:VOS] vos_timer_stop: Timer Addr inside voss_stop : 0x0000000000000000
13 :51 :17 .030170 [13:51:16.928244] [0000000114DCA50A] [VosMC] wlan: [IH:VOS] vos_timer_stop: Cannot stop timer in state = 19
13 :51 :17 .030193 [13:51:16.928261] [0000000114DCA65A] [VosMC] wlan: [I :SYS] Timer MAX CHANNEL TIMEOUT being activated
13 :51 :17 .030233 [13:51:16.928273] [0000000114DCA73C] [VosMC] wlan: [IH:VOS] Timer Addr inside voss_start : 0x0000000000000000
13 :51 :17 .030256 [13:51:16.928295] [0000000114DCA8DF] [VosMC] wlan: [I :SYS] Timer MAX CHANNEL TIMEOUT now activated
13 :51 :17 .030296 [13:51:16.973733] [0000000114E9F8F8] [swapp] wlan: [I :VOS] TIMER callback: running on MC thread
13 :51 :17 .030318 [13:51:16.974113] [0000000114EA154D] [VosMC] wlan: [I :VOS] VosMCThread: Servicing the VOS SYS MC Message queue
13 :51 :17 .030341 [13:51:16.974148] [0000000114EA17D1] [VosMC] wlan: [IH:VOS] Timer Addr inside voss_start : 0x0000000000000000
13 :51 :17 .061520 [13:51:17.024632] [0000000114F8E270] [swapp] wlan: [I :VOS] TIMER callback: running on MC thread
13 :51 :17 .061598 [13:51:17.024869] [0000000114F8F3E7] [VosMC] wlan: [I :VOS] VosMCThread: Servicing the VOS SYS MC Message queue
13 :51 :17 .061623 [13:51:17.024903] [0000000114F8F67C] [VosMC] wlan: [IH:VOS] Timer Addr inside voss_start : 0x0000000000000000
13 :51 :17 .061647 [13:51:17.026933] [0000000114F98F03] [cnss_] wlan: [I :HDD] __wlan_hdd_cfg80211_get_wifi_info: 6759 : Rcvd req for FW version FW version is CNSS-PR-4 -0 -509 -158621 -1
13 :51 :17 .061671 [13:51:17.033122] [0000000114FB5F31] [swapp] wlan: [I :VOS] TIMER callback: running on MC thread
13 :51 :17 .061694 [13:51:17.033292] [0000000114FB6BA3] [VosMC] wlan: [I :VOS] VosMCThread: Servicing the VOS SYS MC Message queue
13 :51 :17 .061716 [13:51:17.033311] [0000000114FB6D0E] [VosMC] wlan: [I :SYS] Timer MAX CHANNEL TIMEOUT triggered
13 :51 :17 .061739 [13:51:17.033337] [0000000114FB6F05] [VosMC] wlan: [I :VOS] VosMCThread: Servicing the VOS PE MC Message queue
13 :51 :17 .061762 [13:51:17.033368] [0000000114FB714E] [VosMC] wlan: [I :PE ] limProcessMaxChannelTimeout: 4127 : Scanning : Max channel timed out
13 :51 :17 .061784 [13:51:17.033382] [0000000114FB7262] [VosMC] wlan: [I :SYS] tx_timer_deactivate() called for timer MAX CHANNEL TIMEOUT
13 :51 :17 .061825 [13:51:17.033399] [0000000114FB73AE] [VosMC] wlan: [IH:VOS] vos_timer_stop: Timer Addr inside voss_stop : 0x0000000000000000
13 :51 :17 .061846 [13:51:17.033412] [0000000114FB749F] [VosMC] wlan: [IH:VOS] vos_timer_stop: Cannot stop timer in state = 19
13 :51 :17 .061869 [13:51:17.033427] [0000000114FB75C9] [VosMC] wlan: [I :SYS] tx_timer_deactivate() called for timer Periodic Probe Request Timer
13 :51 :17 .061909 [13:51:17.033438] [0000000114FB769F] [VosMC] wlan: [IH:VOS] vos_timer_stop: Timer Addr inside voss_stop : 0x0000000000000000
13 :51 :17 .061931 [13:51:17.033450] [0000000114FB7783] [VosMC] wlan: [IH:VOS] vos_timer_stop: Cannot stop timer in state = 19
13 :51 :17 .061955 [13:51:17.033468] [0000000114FB78D4] [VosMC] wlan: [W :PE ] limProcessMaxChannelTimeout: 4154 : Sending End Scan req from MAX_CH_TIMEOUT in state 2 on ch-64 kernel代码分析 驱动模块初始化函数
vendor\qcom\opensource\wlan\prima\CORE\HDD\src\wlan_hdd_main.cstatic int hdd_driver_init( void)
vendor\qcom\opensource\wlan\qcacld-2.0 \CORE\HDD\src\wlan_hdd_main.c0 );
vendor\qcom\opensource\wlan\prima\CORE\VOSS\src\vos_api.c
其中开启线程“VosMCThread” );
static int
set_user_nice(current, -2 );
while (!shutdown)
<span class="hljs-keyword">if</span>(retWaitStatus == -ERESTARTSYS)
{VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_ERROR,<span class="hljs-string">"%s: wait_event_interruptible returned -ERESTARTSYS"</span>, __func__);<span class="hljs-keyword">break</span>;
}
clear_bit(MC_POST_EVENT, &pSchedContext->mcEventFlag);
<span class="hljs-comment">// 循环</span>
<span class="hljs-keyword">while</span>(<span class="hljs-number">1</span>)
{<span class="hljs-comment">// Check if MC needs to shutdown</span><span class="hljs-keyword">if</span>(test_bit(MC_SHUTDOWN_EVENT, &pSchedContext->mcEventFlag)){VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_INFO,<span class="hljs-string">"%s: MC thread signaled to shutdown"</span>, __func__);shutdown = VOS_TRUE;<span class="hljs-comment">/* Check for any Suspend Indication */</span><span class="hljs-keyword">if</span> (test_and_clear_bit(MC_SUSPEND_EVENT,&pSchedContext->mcEventFlag)){<span class="hljs-comment">/* Unblock anyone waiting on suspend */</span>complete(&pHddCtx->mc_sus_event_var);}<span class="hljs-keyword">break</span>;}<span class="hljs-comment">// while循环中处理各种消息</span>vStatus = WDA_McProcessMsg( pSchedContext->pVContext, pMsgWrapper->pVosMsg);
vendor\qcom\opensource\wlan\prima\CORE\WDA\src\wlan_qct_wda.cpMsg ) Process all the WDA messages… */switch ( pMsg->type )case WDA_INIT_SCAN_REQ:)pMsg->bodyptr) ;break ; start SCAN request from PE */case WDA_START_SCAN_REQ: break ;
if (IS_WDI_STATUS_FAILURE(status))"Failure in Start Scan WDI API, free all the memory " “It should be due to previous abort scan.” );0 ) ;return CONVERT_WDI2VOS_STATUS(status) ;
vendor\qcom\opensource\wlan\prima\CORE\WDA\src\wlan_qct_wda.cpScanRsp, pUserData)0 ) ;return ;
vendor\qcom\opensource\wlan\prima\CORE\MAC\src\pe\lim\limProcessMessageQueue.ccase SIR_LIM_UPDATE_BEACON:break ;case WDA_INIT_SCAN_RSP:NULL ;break ;case WDA_START_SCAN_RSP: NULL ;break ;
vendor\qcom\opensource\wlan\prima\CORE\MAC\src\pe\lim\limProcessMlmRspMessages.ctrue );NULL );NULL ;if ( pMac->lim.abortScan )" finish scan" ) );0 ;0 , 0 );switch (pMac->lim.gLimHalScanState)case eLIM_HAL_START_SCAN_WAIT_STATE:if (status != (tANI_U32) eHAL_STATUS_SUCCESS)“StartScanRsp with failed status= %d” ), status)?0 , 0 );else break ;default :“Rcvd StartScanRsp not in WAIT State, state %d” ),break ;return ;
vendor\qcom\opensource\wlan\prima\CORE\MAC\src\pe\lim\limProcessMlmReqMessages.cdo
<span class="hljs-comment">/* Send self MAC as src address if* MAC spoof is not enabled OR* spoofMacAddr is all 0 OR* disableP2PMacSpoof is enabled and scan is P2P scan* else use the spoofMac as src address*/</span><span class="hljs-keyword">if</span> ((pMac->lim.isSpoofingEnabled != <span class="hljs-keyword">TRUE</span>) ||(<span class="hljs-keyword">TRUE</span> ==vos_is_macaddr_zero((v_MACADDR_t *)&pMac->lim.spoofMacAddr)) ||(pMac->roam.configParam.disableP2PMacSpoofing &&pMac->lim.gpLimMlmScanReq->p2pSearch)) {vos_mem_copy(gSelfMacAddr, pMac->lim.gSelfMacAddr, VOS_MAC_ADDRESS_LEN);} <span class="hljs-keyword">else</span> {vos_mem_copy(gSelfMacAddr, pMac->lim.spoofMacAddr, VOS_MAC_ADDRESS_LEN);}limLog(pMac, LOG1,FL(<span class="hljs-string">" Mac Addr "</span>MAC_ADDRESS_STR <span class="hljs-string">" used in sending ProbeReq number %d, for SSID %s on channel: %d"</span>),MAC_ADDR_ARRAY(gSelfMacAddr) ,i, pMac->lim.gpLimMlmScanReq->ssId[i].ssId, channelNum);<span class="hljs-comment">// include additional IE if there is</span>
<span class="hljs-keyword">if</span> ( status != eSIR_SUCCESS){PELOGE(limLog(pMac, LOGE, FL(<span class="hljs-string">"send ProbeReq failed for SSID %s on channel: %d"</span>),pMac->lim.gpLimMlmScanReq->ssId[i].ssId, channelNum);)limDeactivateAndChangeTimer(pMac, eLIM_MIN_CHANNEL_TIMER);limSendHalEndScanReq(pMac, channelNum, eLIM_HAL_END_SCAN_WAIT_STATE);<span class="hljs-keyword">return</span>;}i++;} <span class="hljs-keyword">while</span> (i < pMac->lim.gpLimMlmScanReq->numSsid);
else “START PASSIVE Scan chan %d” ), channelNum);
<span class="hljs-comment">/// Passive Scanning. Activate maxChannelTimer</span><span class="hljs-keyword">if</span> (tx_timer_deactivate(&pMac->lim.limTimers.gLimMaxChannelTimer) <span class="hljs-comment">// 定时器, 信道停留最大时间</span>!= TX_SUCCESS){<span class="hljs-comment">// Could not deactivate max channel timer.</span><span class="hljs-comment">// Log error</span>limLog(pMac, LOGE, FL(<span class="hljs-string">"Unable to deactivate max channel timer"</span>));limSendHalEndScanReq(pMac, channelNum,eLIM_HAL_END_SCAN_WAIT_STATE);}<span class="hljs-keyword">else</span>{<span class="hljs-keyword">if</span> (pMac->miracast_mode){val = DEFAULT_MIN_CHAN_TIME_DURING_MIRACAST +DEFAULT_MAX_CHAN_TIME_DURING_MIRACAST;}<span class="hljs-keyword">else</span> <span class="hljs-keyword">if</span> (wlan_cfgGetInt(pMac, WNI_CFG_PASSIVE_MAXIMUM_CHANNEL_TIME,&val) != eSIR_SUCCESS){<span class="hljs-comment">/*** Could not get max channel value* from CFG. Log error.*/</span>limLog(pMac, LOGE,FL(<span class="hljs-string">"could not retrieve passive max chan value, Use Def val"</span>));val= WNI_CFG_PASSIVE_MAXIMUM_CHANNEL_TIME_STADEF;}val = SYS_MS_TO_TICKS(val);<span class="hljs-comment">// 重新设置定时器</span><span class="hljs-keyword">if</span> (tx_timer_change(&pMac->lim.limTimers.gLimMaxChannelTimer, val, <span class="hljs-number">0</span>) != TX_SUCCESS){<span class="hljs-comment">// Could not change max channel timer.</span><span class="hljs-comment">// Log error</span>limLog(pMac, LOGE, FL(<span class="hljs-string">"Unable to change max channel timer"</span>));limDeactivateAndChangeTimer(pMac, eLIM_MAX_CHANNEL_TIMER);limSendHalEndScanReq(pMac, channelNum,eLIM_HAL_END_SCAN_WAIT_STATE);<span class="hljs-keyword">return</span>;}<span class="hljs-keyword">else</span> <span class="hljs-keyword">if</span> (tx_timer_activate(&pMac->lim.limTimers.gLimMaxChannelTimer)!= TX_SUCCESS){limLog(pMac, LOGE, FL(<span class="hljs-string">"could not start max channel timer"</span>));limDeactivateAndChangeTimer(pMac, eLIM_MAX_CHANNEL_TIMER);limSendHalEndScanReq(pMac, channelNum,eLIM_HAL_END_SCAN_WAIT_STATE);<span class="hljs-keyword">return</span>;}}<span class="hljs-comment">// Wait for Beacons to arrive</span>
} <span class="hljs-comment">// if (pMac->lim.gLimMlmScanReq->scanType == eSIR_ACTIVE_SCAN)</span>limAddScanChannelInfo(pMac, channelNum);
<span class="hljs-keyword">return</span>;
}
probe request位置
停止定时器处理函数
超时处理函数, 代码中可以看到，好多超时用的都是同一个函数case SIR_LIM_MIN_CHANNEL_TIMEOUT:case SIR_LIM_MAX_CHANNEL_TIMEOUT:case SIR_LIM_PERIODIC_PROBE_REQ_TIMEOUT:case SIR_LIM_JOIN_FAIL_TIMEOUT:case SIR_LIM_PERIODIC_JOIN_PROBE_REQ_TIMEOUT:case SIR_LIM_AUTH_FAIL_TIMEOUT:case SIR_LIM_AUTH_RSP_TIMEOUT:case SIR_LIM_ASSOC_FAIL_TIMEOUT:case SIR_LIM_REASSOC_FAIL_TIMEOUT:case SIR_LIM_FT_PREAUTH_RSP_TIMEOUT:case SIR_LIM_REMAIN_CHN_TIMEOUT:case SIR_LIM_INSERT_SINGLESHOT_NOA_TIMEOUT:case SIR_LIM_DISASSOC_ACK_TIMEOUT:case SIR_LIM_DEAUTH_ACK_TIMEOUT:case SIR_LIM_CONVERT_ACTIVE_CHANNEL_TO_PASSIVE:case SIR_LIM_AUTH_RETRY_TIMEOUT:case SIR_LIM_SAP_ECSA_TIMEOUT:case SIR_LIM_PREAUTH_MBB_RSP_TIMEOUT:case SIR_LIM_REASSOC_MBB_RSP_TIMEOUT:
limProcessMlmReqMessages(pMac,limMsg);<span class="hljs-keyword">break</span>;
}
不同消息函数处理switch (Msg->type)case LIM_MLM_START_REQ: limProcessMlmStartReq(pMac, Msg->bodyptr); break ;case LIM_MLM_SCAN_REQ: limProcessMlmScanReq(pMac, Msg->bodyptr); break ;case LIM_MLM_OEM_DATA_REQ: limProcessMlmOemDataReq(pMac, Msg->bodyptr); break ;case LIM_MLM_JOIN_REQ: limProcessMlmJoinReq(pMac, Msg->bodyptr); break ;case LIM_MLM_AUTH_REQ: limProcessMlmAuthReq(pMac, Msg->bodyptr); break ;case LIM_MLM_ASSOC_REQ: limProcessMlmAssocReq(pMac, Msg->bodyptr); break ;case LIM_MLM_REASSOC_REQ: limProcessMlmReassocReq(pMac, Msg->bodyptr); break ;case LIM_MLM_DISASSOC_REQ: limProcessMlmDisassocReq(pMac, Msg->bodyptr); break ;case LIM_MLM_DEAUTH_REQ: limProcessMlmDeauthReq(pMac, Msg->bodyptr); break ;case LIM_MLM_SETKEYS_REQ: limProcessMlmSetKeysReq(pMac, Msg->bodyptr); break ;case LIM_MLM_REMOVEKEY_REQ: limProcessMlmRemoveKeyReq(pMac, Msg->bodyptr); break ;case SIR_LIM_MIN_CHANNEL_TIMEOUT: limProcessMinChannelTimeout(pMac); break ;case SIR_LIM_MAX_CHANNEL_TIMEOUT: limProcessMaxChannelTimeout(pMac); break ;case SIR_LIM_PERIODIC_PROBE_REQ_TIMEOUT:break ;case SIR_LIM_JOIN_FAIL_TIMEOUT: limProcessJoinFailureTimeout(pMac); break ;case SIR_LIM_PERIODIC_JOIN_PROBE_REQ_TIMEOUT:break ;case SIR_LIM_AUTH_FAIL_TIMEOUT: limProcessAuthFailureTimeout(pMac); break ;case SIR_LIM_AUTH_RSP_TIMEOUT: limProcessAuthRspTimeout(pMac, Msg->bodyval); break ;case SIR_LIM_ASSOC_FAIL_TIMEOUT: limProcessAssocFailureTimeout(pMac, Msg->bodyval); break ;case SIR_LIM_FT_PREAUTH_RSP_TIMEOUT:limProcessFTPreauthRspTimeout(pMac); break ;case SIR_LIM_PREAUTH_MBB_RSP_TIMEOUT:break ;case SIR_LIM_REASSOC_MBB_RSP_TIMEOUT:break ;case SIR_LIM_REMAIN_CHN_TIMEOUT: limProcessRemainOnChnTimeout(pMac); break ;case SIR_LIM_INSERT_SINGLESHOT_NOA_TIMEOUT:break ;case SIR_LIM_CONVERT_ACTIVE_CHANNEL_TO_PASSIVE:break ;case SIR_LIM_AUTH_RETRY_TIMEOUT:break ;case SIR_LIM_DISASSOC_ACK_TIMEOUT: limProcessDisassocAckTimeout(pMac); break ;case SIR_LIM_DEAUTH_ACK_TIMEOUT: limProcessDeauthAckTimeout(pMac); break ;case SIR_LIM_SAP_ECSA_TIMEOUT: lim_process_ap_ecsa_timeout(pMac);break ;case LIM_MLM_ADDBA_REQ: limProcessMlmAddBAReq( pMac, Msg->bodyptr ); break ;case LIM_MLM_ADDBA_RSP: limProcessMlmAddBARsp( pMac, Msg->bodyptr ); break ;case LIM_MLM_DELBA_REQ: limProcessMlmDelBAReq( pMac, Msg->bodyptr ); break ;case LIM_MLM_TSPEC_REQ:default :break ;
vendor\qcom\opensource\wlan\prima\CORE\MAC\src\pe\lim\limProcessMlmReqMessages.c
vendor\qcom\opensource\wlan\prima\CORE\MAC\src\pe\lim\limProcessMlmReqMessages.cstatic void
<span class="hljs-comment">/*do not process if we are in finish scan wait state i.e.scan is aborted or finished*/</span>
<span class="hljs-keyword">if</span> ((pMac->lim.gLimMlmState == eLIM_MLM_WT_PROBE_RESP_STATE ||pMac->lim.gLimMlmState == eLIM_MLM_PASSIVE_SCAN_STATE) &&pMac->lim.gLimHalScanState != eLIM_HAL_FINISH_SCAN_WAIT_STATE)
{limLog(pMac, LOG1, FL(<span class="hljs-string">"Scanning : Max channel timed out"</span>)); <span class="hljs-comment">// 打印log，提示超时</span><span class="hljs-comment">/*** MAX channel timer timed out* Continue channel scan.*/</span>limDeactivateAndChangeTimer(pMac, eLIM_MAX_CHANNEL_TIMER);limDeactivateAndChangeTimer(pMac, eLIM_PERIODIC_PROBE_REQ_TIMER);pMac->lim.limTimers.gLimPeriodicProbeReqTimer.sessionId = <span class="hljs-number">0xff</span>;pMac->lim.probeCounter = <span class="hljs-number">0</span>;<span class="hljs-keyword">if</span> (pMac->lim.gLimCurrentScanChannelId <=(tANI_U32)(pMac->lim.gpLimMlmScanReq->channelList.numChannels - <span class="hljs-number">1</span>)){channelNum = limGetCurrentScanChannel(pMac);}<span class="hljs-keyword">else</span>{<span class="hljs-keyword">if</span>(pMac->lim.gpLimMlmScanReq->channelList.channelNumber){channelNum = pMac->lim.gpLimMlmScanReq->channelList.channelNumber[pMac->lim.gpLimMlmScanReq->channelList.numChannels - <span class="hljs-number">1</span>];}<span class="hljs-keyword">else</span>{channelNum = <span class="hljs-number">1</span>;}}limLog(pMac, LOGW,FL(<span class="hljs-string">"Sending End Scan req from MAX_CH_TIMEOUT in state %d on ch-%d"</span>), <span class="hljs-comment">// kerel log</span>pMac->lim.gLimMlmState,channelNum);limSendHalEndScanReq(pMac, channelNum, eLIM_HAL_END_SCAN_WAIT_STATE); <span class="hljs-comment">// 停止扫描请求</span>
}
<span class="hljs-keyword">else</span>
{<span class="hljs-comment">/*** MAX channel timer should not have timed out* in states other than wait_scan.* Log error.*/</span>limLog(pMac, LOGW,FL(<span class="hljs-string">"received unexpected MAX channel timeout in mlme state %d and hal scan state %d"</span>),pMac->lim.gLimMlmState, pMac->lim.gLimHalScanState);limPrintMlmState(pMac, LOGW, pMac->lim.gLimMlmState);
}
}
