modules/Tracing/private/Start-NetshTrace.ps1
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# Copyright (c) Microsoft Corporation. # Licensed under the MIT License. function Start-NetshTrace { <# .SYNOPSIS Enables netsh tracing. Supports pre-configured trace providers or custom provider strings. .PARAMETER TraceProviderString The trace providers in string format that you want to trace on. .PARAMETER OutputDirectory Specifies a specific path and folder in which to save the files. .PARAMETER MaxTraceSize Optional. Specifies the maximum size in MB for saved trace files. If unspecified, the default is 1024. .PARAMETER Capture Optional. Specifies whether packet capture is enabled in addition to trace events. If unspecified, the default is No. .PARAMETER Overwrite Optional. Specifies whether this instance of the trace conversion command overwrites files that were rendered from previous trace conversions. If unspecified, the default is Yes. .PARAMETER Report Optional. Specifies whether a complementing report will be generated in addition to the trace file report. If unspecified, the default is disabled. .EXAMPLE PS> Start-NetshTrace -OutputDirectory "C:\Temp\CSS_SDN" -Capture Yes .EXAMPLE PS> Start-NetshTrace -OutputDirectory "C:\Temp\CSS_SDN" -TraceProviderString 'provider="{EB171376-3B90-4169-BD76-2FB821C4F6FB}" level=0xff' -Capture No .EXAMPLE PS> Start-NetshTrace -OutputDirectory "C:\Temp\CSS_SDN" -TraceProviderString 'provider="{EB171376-3B90-4169-BD76-2FB821C4F6FB}" level=0xff' -Capture Yes .EXAMPLE PS> Start-NetshTrace -OutputDirectory "C:\Temp\CSS_SDN" -Capture Yes -MaxTraceSize 2048 -Report Disabled .EXAMPLE #> [CmdletBinding()] param ( [Parameter(Mandatory = $true)] [System.IO.FileInfo]$OutputDirectory, [Parameter(Mandatory = $false)] [System.String]$TraceProviderString, [Parameter(Mandatory = $false)] [int]$MaxTraceSize = 1024, [Parameter(Mandatory = $false)] [ValidateSet('Yes', 'No')] [System.String]$Capture = 'No', [Parameter(Mandatory = $false)] [ValidateSet('Yes', 'No')] [System.String]$Overwrite = 'Yes', [Parameter(Mandatory = $false)] [ValidateSet('Enabled', 'Disabled')] [System.String]$Report = 'Disabled' ) try { # ensure that we at least are attempting to configure NDIS tracing or ETW provider tracing, else the netsh # command will return a generic exception that is not useful to the operator if ($Capture -ieq 'No' -and !$TraceProviderString) { throw New-Object System.Exception("You must at least specify Capture or TraceProviderString parameter") } # ensure that the directory exists and specify the trace file name if (!(Test-Path -Path $OutputDirectory.FullName -PathType Container)) { $null = New-Item -Path $OutputDirectory.FullName -ItemType Directory -Force } $traceFile = "{0}\{1}_{2}_netshTrace.etl" -f $OutputDirectory.FullName, $env:COMPUTERNAME, (Get-FormattedDateTimeUTC) # enable the network trace if ($TraceProviderString) { $cmd = "netsh trace start capture={0} {1} tracefile={2} maxsize={3} overwrite={4} report={5}" ` -f $Capture, $TraceProviderString, $traceFile, $MaxTraceSize, $Overwrite, $Report } else { $cmd = "netsh trace start capture={0} tracefile={1} maxsize={2} overwrite={3} report={4}" ` -f $Capture, $traceFile, $MaxTraceSize, $Overwrite, $Report } "Starting netsh trace" | Trace-Output "Netsh trace cmd:`n`t{0}" -f $cmd | Trace-Output -Level:Verbose $expression = Invoke-Expression -Command $cmd if ($expression -ilike "*Running*") { $object = New-Object -TypeName PSCustomObject -Property ( [Ordered]@{ Status = 'Running' FileName = $traceFile } ) } elseif ($expression -ilike "*A tracing session is already in progress*") { "A tracing session is already in progress" | Trace-Output -Level:Warning $object = New-Object -TypeName PSCustomObject -Property ( [Ordered]@{ Status = 'Running' } ) } else { # typically, the first line returned in scenarios where there was an error thrown will contain the error details $msg = $expression[0] throw New-Object System.Exception($msg) } return $object } catch { "{0}`n{1}" -f $_.Exception, $_.ScriptStackTrace | Trace-Output -Level:Error } } |