Windows ETW 学习与使用二

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一、枚举ETW

EnumerateTraceGuidsEx 来枚举Providers 的注册者的相关ETW的注册信息

#include <windows.h>
#include <stdio.h>
#include <evntcons.h>

DWORD GetProviderInfo(GUID ProviderGuid, PTRACE_GUID_INFO & pInfo);

void wmain(void)
{
    ULONG status = ERROR_SUCCESS;
    GUID *pTemp = NULL;
    GUID *pGuids = NULL;
    DWORD GuidListSize = 0;
    DWORD GuidCount = 0;
    DWORD RequiredListSize = 0;
    WCHAR ProviderGuid[50];
    PTRACE_GUID_INFO pInfo = NULL;
    PTRACE_PROVIDER_INSTANCE_INFO pInstance = NULL;
    PTRACE_ENABLE_INFO pEnable = NULL;


    // Get the required buffer size for the query.

    status = EnumerateTraceGuidsEx(TraceGuidQueryList, NULL, 0, pGuids, GuidListSize, &RequiredListSize);

    // The number of registered providers could change between the 
    // time you called to get the buffer size and the time you called
    // to get the actual data, so call EnumerateTraceGuidsEx in a loop
    // until you no longer get ERROR_INSUFFICIENT_BUFFER.

    while (ERROR_INSUFFICIENT_BUFFER == status)
    {
        pTemp = (GUID *) realloc(pGuids, RequiredListSize);

        if (NULL == pTemp)
        {
            wprintf(L"Error allocating memory for list of provider GUIDs.\n");
            goto cleanup;
        }

        pGuids = pTemp;
        pTemp = NULL;

        GuidListSize = RequiredListSize;

        ZeroMemory(pGuids, GuidListSize);

        status = EnumerateTraceGuidsEx(TraceGuidQueryList, NULL, 0, pGuids, GuidListSize, &RequiredListSize);
    }

    if (ERROR_SUCCESS == status)
    {
        GuidCount = GuidListSize / sizeof(GUID);

        // For each registered provider on the computer, get information
        // about how it was registered. If a session enabled the
        // provider, get information on how the session enabled the provider.

        for (USHORT i = 0; i < GuidCount; i++)
        {
            StringFromGUID2(pGuids[i], ProviderGuid, sizeof(ProviderGuid)),

            wprintf(L"Provider: %s\n", ProviderGuid);

            status = GetProviderInfo(pGuids[i], pInfo);

            if (ERROR_SUCCESS == status)
            {
                pInstance = (PTRACE_PROVIDER_INSTANCE_INFO)((PBYTE)pInfo + sizeof(TRACE_GUID_INFO));

                if (pInfo->InstanceCount > 1)
                {
                    wprintf(L"There are %d providers that use the same GUID.\n", pInfo->InstanceCount);
                }

                for (DWORD j = 0; j < pInfo->InstanceCount; j++)
                {
                    wprintf(L"\tThe PID of the process that registered the provider is %lu.\n", pInstance->Pid);

                    if ((pInstance->Flags & TRACE_PROVIDER_FLAG_PRE_ENABLE) == TRACE_PROVIDER_FLAG_PRE_ENABLE)
                    {
                        wprintf(L"\tThe provider is not registered; however, one or more sessions have enabled the provider.\n");
                    }
                    else
                    {
                        if ((pInstance->Flags & TRACE_PROVIDER_FLAG_LEGACY) == TRACE_PROVIDER_FLAG_LEGACY)
                        {
                            wprintf(L"\tThe provider used RegisterTraceGuids to register itself.\n");
                        }
                        else
                        {
                            wprintf(L"\tThe provider used EventRegister to register itself.\n");
                        }
                    }

                    if (pInstance->EnableCount > 0)
                    {
                        wprintf(L"\tThe provider is enabled to the following sessions.\n");

                        pEnable = (PTRACE_ENABLE_INFO)((PBYTE)pInstance + sizeof(TRACE_PROVIDER_INSTANCE_INFO));

                        for (DWORD k = 0; k < pInstance->EnableCount; k++)
                        {
                            wprintf(L"\t\tSession Id: %hu\n", pEnable->LoggerId);
                            wprintf(L"\t\tLevel used to enable the provider: %hu\n", pEnable->Level);
                            wprintf(L"\t\tMatchAnyKeyword value used to enable the provider: %I64u\n", pEnable->MatchAnyKeyword);
                            wprintf(L"\t\tMatchAllKeyword value used to enable the provider: %I64u\n", pEnable->MatchAllKeyword);

                            if (pEnable->EnableProperty > 0)
                            {
                                wprintf(L"\t\tThe session requested that the following information be included with each event:\n");

                                if ((pEnable->EnableProperty & EVENT_ENABLE_PROPERTY_SID) == EVENT_ENABLE_PROPERTY_SID)
                                {
                                    wprintf(L"\t\t\tThe SID of the user that logged the event\n");
                                }

                                if ((pEnable->EnableProperty & EVENT_ENABLE_PROPERTY_TS_ID) == EVENT_ENABLE_PROPERTY_TS_ID)
                                {
                                    wprintf(L"\t\t\tThe terminal session ID\n");
                                }
                            }

                            pEnable++;

                            wprintf(L"\n");
                        }
                    }

                    pInstance = (PTRACE_PROVIDER_INSTANCE_INFO)((PBYTE)pInstance + pInstance->NextOffset);

                    wprintf(L"\n");
                }

                wprintf(L"\n");
            }
            else
            {
                wprintf(L"Error retrieving provider info (%lu)\n\n", status);
            }
        }

        wprintf(L"\nRegistered provider count is %lu.\n", GuidCount);
    }
    else
    {
        wprintf(L"EnumerateTraceGuidsEx(TraceGuidQueryList) failed with %lu.\n", status);
        goto cleanup;
    }

cleanup:

    if (pGuids)
    {
        free(pGuids);
        pGuids = NULL;
    }

    if (pInfo)
    {
        free(pInfo);
        pInfo = NULL;
    }
}


// Get information about the specified provider.

DWORD GetProviderInfo(GUID ProviderGuid, PTRACE_GUID_INFO & pInfo)
{
    ULONG status = ERROR_SUCCESS;
    PTRACE_GUID_INFO pTemp = NULL;
    DWORD InfoListSize = 0;
    DWORD RequiredListSize = 0;

    status = EnumerateTraceGuidsEx(TraceGuidQueryInfo, &ProviderGuid, sizeof(GUID), pInfo, InfoListSize, &RequiredListSize);

    while (ERROR_INSUFFICIENT_BUFFER == status)
    {
        pTemp = (PTRACE_GUID_INFO) realloc(pInfo, RequiredListSize);

        if (NULL == pTemp)
        {
            wprintf(L"Error allocating memory for provider info.\n");
            goto cleanup;
        }

        pInfo = pTemp;
        pTemp = NULL;

        InfoListSize = RequiredListSize;

        ZeroMemory(pInfo, InfoListSize);

        status = EnumerateTraceGuidsEx(TraceGuidQueryInfo, &ProviderGuid, sizeof(GUID), pInfo, InfoListSize, &RequiredListSize);
    }

    if (ERROR_SUCCESS != status)
    {
        wprintf(L"EnumerateTraceGuidsEx(TraceGuidQueryInfo) failed with %lu.\n", status);
    }

cleanup:

    return status;
}

View Code

 

二、关闭ETW

 2.1 StopTrace

        status = StopTraceW(SessionHandle, LOGSESSION_NAME, pSessionProperties);
        if (ERROR_SUCCESS != status)
        {
            wprintf(L"StopTraceW(stop) failed with %lu\n", status);
        }

 

 2.2 ControlTrace传入EVENT_TRACE_CONTROL_STOP

实际StopTrace就是调用ControlTrace传入EVENT_TRACE_CONTROL_STOP来实现的

    status = ControlTraceW(SessionHandle, LOGSESSION_NAME, pSessionProperties, EVENT_TRACE_CONTROL_STOP);

        if (ERROR_SUCCESS != status)
        {
            wprintf(L"ControlTrace(stop) failed with %lu\n", status);
        }

 

 2.3 EnableTraceEx2传入EVENT_CONTROL_CODE_DISABLE_PROVIDER

  status = EnableTraceEx2(
                SessionHandle,
                (LPCGUID)&__KernelNetworkGuid,
                EVENT_CONTROL_CODE_DISABLE_PROVIDER,
                TRACE_LEVEL_INFORMATION,
                0,
                0,
                0,
                NULL
            );

 

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