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function ConvertFrom-CidrToIPvNetwork |
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{ |
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[CmdletBinding()] |
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param( |
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[Parameter(Mandatory, ValueFromPipeline)] |
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[string] $vlsm |
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) |
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$convertToIpAddress = { |
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param( |
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[int] $byteRange, |
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[System.Numerics.BigInteger]$bigInt |
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) |
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$bytes = $bigInt.ToByteArray() |
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$null = [System.Array]::Reverse($bytes, 0, $byteRange) |
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$null = [System.Array]::Resize([ref] $bytes, $byteRange) |
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[System.Net.IpAddress]::new($bytes) |
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} |
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$ipAddress, $prefix = $vlsm -split '/' |
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$ipAddressIP = [System.Net.IPAddress]::Parse($ipAddress) |
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if ($ipAddressIP.AddressFamily -eq 'InterNetwork') { |
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# use V4 |
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$byteRange = 4 |
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} else { |
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# Use V6 |
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$byteRange = 16 |
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} |
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$ipAddress = [System.Numerics.BigInteger]::new( $ipAddressIP.GetAddressBytes()[($byteRange-1)..0]) |
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#$ipAddress = [bigint]::new( ([byte[]]$ipAddressIP.GetAddressBytes()[($byteRange-1)..0]), $true, $true ) |
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$broadcastAddress = ( [System.Numerics.BigInteger]1 -shl ($byteRange* 8) ) - 1 |
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$subnetMask = $broadcastAddress -shl (($byteRange*8) - $prefix) |
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$networkAddress = $ipAddress -band $subnetMask |
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$networkBroadcast = $networkAddress -bor (-bnot $subnetMask) |
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$startIPAddress = $networkAddress + 1 |
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$endIPAddress = $networkBroadcast - 1 |
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$total = [System.Numerics.BigInteger]::Pow(2, (($byteRange*8)- $prefix)) - 2 |
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[PSCustomObject][Ordered]@{ |
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IpAddress = $ipAddressIP |
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AddressFamily = $ipAddressIP.AddressFamily |
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Prefix = $prefix |
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Network = & $convertToIpAddress $byteRange $networkAddress |
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SubnetMask = & $convertToIpAddress $byteRange $subnetMask |
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BroadcastAddress = & $convertToIpAddress $byteRange $broadcastAddress |
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Range = [PSCustomObject][Ordered]@{ |
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Start = & $convertToIpAddress $byteRange $startIPAddress |
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End = & $convertToIpAddress $byteRange $endIPAddress |
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Total = $total |
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} |
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} |
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} |
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function Test-IpAddressinNetwork { |
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[CmdletBinding()] |
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param( |
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[Parameter(Mandatory, ValueFromPipeline)] |
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[string] $ipAddress, |
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[Parameter(Mandatory, ValueFromPipeline)] |
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[string] $vlsm |
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) |
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$ipAddressIP = [System.Net.IPAddress]::Parse($ipAddress) |
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$vlsmNetwork = ConvertFrom-CidrToIPvNetwork -vlsm $vlsm |
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if ($ipAddressIP.AddressFamily -eq 'InterNetwork') { |
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# use V4 |
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$byteRange = 4 |
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} else { |
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# Use V6 |
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$byteRange = 16 |
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} |
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$ipAddress = [System.Numerics.BigInteger]::new( $ipAddressIP.GetAddressBytes()[($byteRange-1)..0]) |
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$networkAddress = [System.Numerics.BigInteger]::new( $vlsmNetwork.Network.GetAddressBytes()[($byteRange-1)..0]) |
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$subnetMask = [System.Numerics.BigInteger]::new( $vlsmNetwork.SubnetMask.GetAddressBytes()[($byteRange-1)..0]) |
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return ($ipAddress -band $subnetMask) -eq ($networkAddress -band $subnetMask) |
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} |
