Public/Invoke-ALHWakeOnLan.ps1
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<#PSScriptInfo
.VERSION 1.0.2 .GUID 5cbd7525-1d02-41ab-93f3-b78f276a4cf6 .AUTHOR Dieter Koch .COMPANYNAME .COPYRIGHT (c) 2021-2023 Dieter Koch .TAGS .LICENSEURI https://github.com/admins-little-helper/ALH/blob/main/LICENSE .PROJECTURI .ICONURI .EXTERNALMODULEDEPENDENCIES .REQUIREDSCRIPTS .EXTERNALSCRIPTDEPENDENCIES .RELEASENOTES 1.0.0 Initial release 1.0.1 Fixed issue with WolProxy in case a hostname is specified instead of an ip address. Changed behaviour to disallow -Wait parameter together with -WolProxy parameter as it makes no sense to have this together. 1.0.2 Fixed count of attempts #> <# .DESCRIPTION Function to send wake on lan magic packet. Basic idea about how to send a magic packet based on: https://www.pdq.com/blog/wake-on-lan-wol-magic-packet-powershell/ #> function Invoke-ALHWakeOnLan { <# .SYNOPSIS Function to send wake on lan magic packet. .DESCRIPTION This function sends a magic packet (WoL / Wake-On-Lan) to wake up one ore multiple systems specified by their MAC address. .PARAMETER MacAddress String. One or more strings specifying the target MAC address to wake up. .PARAMETER WolProxy String. IP address or hostname of a system that acts as Wake-On-Lan proxy and forwards the magic packet. Used in scenarios where you want to wake a host in a different subnet. Can not be combined with parameter Wait. .PARAMETER Wait Switch. If specified, the function checks if the system comes up and waits for about 40 seconds per system. Can not be combined with parameter WolProxy. .EXAMPLE Invoke-ALHWakeOnLan -MacAddress "00:11:22:33:44:55" Send magic packet to wake up host with MAC address '00:11:22:33:44:55' .EXAMPLE Invoke-ALHWakeOnLan -MacAddress "00:11:22:33:44:55" -Wait -Verbose Send magic packet to wake up host with MAC address '00:11:22:33:44:55' and wait until it is up or timeout is reached. .EXAMPLE Invoke-ALHWakeOnLan -MacAddress "00:11:22:33:44:55" -WolProxy 10.255.255.255 Send magic packet to wake up host with MAC address '00:11:22:33:44:55' and use WolProxy 10.255.255.255. .EXAMPLE Invoke-ALHWakeOnLan -MacAddress '00:11:22:33:44:55', '66:77:88:99:AA:BB' Send magic packet to wake up hosts with MAC address '00:11:22:33:44:55' and '66:77:88:99:AA:BB' .INPUTS String .OUTPUTS Nothing .NOTES Author: Dieter Koch Email: diko@admins-little-helper.de .LINK https://github.com/admins-little-helper/ALH/blob/main/Help/Invoke-ALHWakeOnLan.txt #> [CmdletBinding(DefaultParameterSetName = "default")] param ( [Parameter(Mandatory, ValueFromPipeline)] [string[]] $MacAddress, [Parameter(ParameterSetName = "WolProxy")] [ValidateNotNullOrEmpty()] [string] $WolProxy, [Parameter(ParameterSetName = "NoWolProxy")] [switch] $Wait ) begin { if ([string]::IsNullOrEmpty($WolProxy)) { $WolProxyTargetIP = [System.Net.IPAddress]::Broadcast } else { if ($WolProxy -as [System.Net.IPAddress]) { Write-Verbose -Message "Specified Wake-On-Lan proxy seems to be an IP address" $WolProxyTargetIP = ($WolProxy -as [System.Net.IPAddress]).IpAddressTostring } else { try { Write-Verbose -Message "Trying to resolve the specified Wake-On-Lan proxy address in DNS" $WolProxyTargetIP = ([System.Net.Dns]::GetHostByName($WolProxy)).AddressList[0].IPAddressToString } catch { Write-Warning -Message "Wake-On-Lan proxy hostname '$WolProxy' could not be resolved to an IP address." break } } } if ([string]::IsNullOrEmpty($WolProxyTargetIP)) { Write-Error -Message "Unable to correctly define target address for Wake-On-Lan. Aborting." break } } process { foreach ($Target in $MacAddress) { Write-Information -Message "Trying to wake up system with MAC address: '$Target'..." -InformationAction Continue $MacByteArray = $MacAddress -split "[:-]" | ForEach-Object { [Byte] "0x$_" } [Byte[]] $MagicPacket = (, 0xFF * 6) + ($MacByteArray * 16) $UdpClient = New-Object System.Net.Sockets.UdpClient Write-Verbose -Message "Sending magic packet to address '$WolProxyTargetIP'" $UdpClient.Connect($WolProxyTargetIP, 7) $null = $UdpClient.Send($MagicPacket, $MagicPacket.Length) $UdpClient.Close() if ($Wait.IsPresent) { $MaxAttempts = 20 Write-Information -Message "Checking if host with MAC address '$Target' comes up..." -InformationAction Continue for ($i = 1; $i -lt $MaxAttempts; $i++) { Write-Verbose -Message "Attempt #$i of $MaxAttempts" $ArpRecord = Get-NetNeighbor -LinkLayerAddress $Target -ErrorAction SilentlyContinue if ($null -ne $ArpRecord) { Write-Verbose -Message "Found record in ARP table for MAC address '$Target' with IP address '$($ArpRecord.IPAddress)'" Write-Verbose -Message "Trying to resolve ip to hostname" $DnsRecord = [System.Net.Dns]::GetHostByAddress($ArpRecord.IPAddress) if ($null -ne $DnsRecord) { Write-Information -Message "DNS record found for IP '$($ArpRecord.IPAddress)' --> '$($DnsRecord.HostName)'" -InformationAction Continue } else { Write-Warning -Message "No DNS record found for IP '$($ArpRecord.IPAddress)'" } if (Test-Connection -TargetName $ArpRecord.IPAddress -Ping -Count 1 -Quiet) { Write-Information -Message "Host repsonds to ping on IP address '$($ArpRecord.IPAddress)'" -InformationAction Continue } else { Write-Warning -Message "Host does NOT (yet) respond to ping on IP address '$($ArpRecord.IPAddress)'" } break } else { Write-Verbose -Message "No ARP record found. Waiting 2 seconds before retrying" if ($i -eq $MaxAttempts -or $i -eq $($MaxAttempts - 1)) { Write-Warning -Message "Reached maximum number of attempts. No success so far. Giving up." } } Start-Sleep -Seconds 2 } } } } } #region EndOfScript <# ################################################################################ ################################################################################ # # ______ _ __ _____ _ _ # | ____| | | / _| / ____| (_) | | # | |__ _ __ __| | ___ | |_ | (___ ___ _ __ _ _ __ | |_ # | __| | '_ \ / _` | / _ \| _| \___ \ / __| '__| | '_ \| __| # | |____| | | | (_| | | (_) | | ____) | (__| | | | |_) | |_ # |______|_| |_|\__,_| \___/|_| |_____/ \___|_| |_| .__/ \__| # | | # |_| ################################################################################ ################################################################################ # created with help of http://patorjk.com/software/taag/ #> #endregion |