Functions/Test-IsLocalIPv4.ps1
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function Test-IsLocalIPv4 { <# .SYNOPSIS Tests to determine if a specified IPv4 address is LOCAL or REMOTE (must be sent to default gateway). Aliased to 'Test-IsLocalIP' .DESCRIPTION Tests to determine if a specified IPv4 address is LOCAL or REMOTE (must be sent to default gateway) .PARAMETER Source The source IPv4 address [ipaddress]. Can take property values by name from the pipeline. .PARAMETER SubnetMask The subnet mask in IPv4 address format [ipaddress]. Can take property values by name from the pipeline. .PARAMETER Target The target IPv4 address(es) [ipaddress[]]. Can take values from the pipeline. Can take property values by name from the pipeline. .EXAMPLE Test-IsLocalIPv4 -Source 10.100.10.20 -SubnetMask 255.255.255.0 -Target 10.100.10.30, 10.100.20.40 -IncludeInput Source Target SubnetMask Local ------ ------ ---------- ----- 10.100.10.20 10.100.10.30 255.255.255.0 True 10.100.10.20 10.100.20.40 255.255.255.0 False .EXAMPLE Test-IsLocalIPv4 -Source 10.100.10.20 -SubnetMask 255.255.255.0 -Target 10.100.10.30 True .EXAMPLE [pscustomobject] @{ Source='10.100.10.20'; Target='10.100.20.30'; SubnetMask='255.255.255.0'} | Test-IsLocalIPv4 -IncludeInput Source Target SubnetMask Local ------ ------ ---------- ----- 10.100.10.20 10.100.20.30 255.255.255.0 False .EXAMPLE Test-IsLocalIPv4 -Source 10.100.10.1 -SubnetMask 255.255.0.0 -Target 10.100.20.1,10.101.10.2 -Verbose -IncludeInput VERBOSE: Starting [Test-IsLocalIPv4] VERBOSE: Source = [10.100.10.1] SubnetMask = [255.255.0.0] SourceNetwork = [10.100.0.0] VERBOSE: Target = [10.100.20.1] SubnetMask = [255.255.0.0] TargetNetwork = [10.100.0.0] VERBOSE: Target = [10.101.10.2] SubnetMask = [255.255.0.0] TargetNetwork = [10.101.0.0] VERBOSE: Ending [Test-IsLocalIPv4] Source Target SubnetMask Local ------ ------ ---------- ----- 10.100.10.1 10.100.20.1 255.255.0.0 True 10.100.10.1 10.101.10.2 255.255.0.0 False #> #region parameter [CmdletBinding(ConfirmImpact = 'Low')] [alias('Test-IsLocalIP')] param ( [Parameter(Mandatory, ValueFromPipeline, ValueFromPipelineByPropertyName)] [ipaddress[]] $Target, [Parameter(Mandatory, ValueFromPipelineByPropertyName)] [ipaddress] $Source, [Parameter(Mandatory, ValueFromPipelineByPropertyName)] [ipaddress] $SubnetMask, [Switch] $IncludeInput ) #endregion parameter begin { Write-Verbose -Message "Starting [$($MyInvocation.Mycommand)]" $SourceResult = $Source.Address -band $SubnetMask.Address Write-Verbose -Message "Source = [$($Source.IPAddressToString)] SubnetMask = [$($SubnetMask.IPAddressToString)] SourceNetwork = [$(([ipaddress] $SourceResult).IPAddressToString)]" } process { foreach ($curTarget in $Target) { $TargetResult = $curTarget.Address -band $SubnetMask.Address Write-Verbose -Message "Target = [$($curTarget.IPAddressToString)] SubnetMask = [$($SubnetMask.IPAddressToString)] TargetNetwork = [$(([ipaddress] $TargetResult).IPAddressToString)]" if ($SourceResult -eq $TargetResult) { $Local = $true } else { $Local = $false } if ($IncludeInput) { New-Object -TypeName psobject -Property ([ordered] @{ Source = $Source.IPAddressToString Target = $curTarget.IPAddressToString SubnetMask = $SubnetMask.IPAddressToString Local = $Local }) } else { Write-Output -InputObject $Local } } } end { Write-Verbose -Message "Ending [$($MyInvocation.Mycommand)]" } } |