wakeonlan.ps1

$ErrorActionPreference = "Stop"

$macAddresses = @($Args | ForEach-Object { $_.Replace(":", "-") })

$header = [byte[]](@(0xFF) * 6)
foreach ($macAddress in $macAddresses) {
    $payload = [byte[]]($macAddress.split("-") | ForEach-Object { [Convert]::ToInt32($_, 16) })
    $magicPacket = $header + $payload * 16

    $client = New-Object System.Net.Sockets.UdpClient
    try {
        $client.Connect([System.Net.IPAddress]::Broadcast, 2304)
        $client.Send($magicPacket, $magicPacket.Length) | Out-Null
    }
    finally {
        $client.Close()
    }
}

if ($macAddresses.Count -ne 0) {
    $ipAddresses = Get-NetNeighbor -AddressFamily IPv4 -LinkLayerAddress $macAddresses | Select-Object -Property IPAddress 
    while (@($ipAddresses | Test-Connection -Quiet -Count 1 | Where-Object { !$_ }).Count -ne 0) {
        Start-Sleep 1
    }
}