Functions/Test-IPAddressRequirementsMet.ps1
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function Test-IPAddressRequirementsMet { <# .SYNOPSIS Tests if a given IP address meets zero or more of the following requirements: 1) IS a given subnet. 2) IS NOT in another given subnet. .DESCRIPTION Tests if a given IP address meets zero or more of the following requirements: 1) IS a given subnet. 2) IS NOT in another given subnet. Aliases: tiarm .INPUTS System.Net.IPAddress .OUTPUTS System.Boolean .NOTES Author : Dan Thompson Copyright : 2020 Case Western Reserve University #> [CmdletBinding()] [OutputType([System.Boolean])] param( # The IPv4 address to check. This can be passed from the pipeline. On the pipeline, # this can be a collection of IP addresses. # # Aliases: ip_addr, ip [Parameter( Position = 0, ValueFromPipeline = $True, ValueFromPipelineByPropertyName = $True, Mandatory = $True )] [ValidateNotNullOrEmpty()] [Alias('ip_addr', 'ip')] [System.Net.IPAddress]$IPAddress, # The subnet address of the subnet to check for membership in. # # Aliases: in_snet [ValidateCount(2,2)] [Alias('in_snet')] [System.Net.IPAddress[]]$InSubnet, # The subnet mask of the subnet to check for membership in. # # Aliases: notin_snet [ValidateCount(2,2)] [Alias('notin_snet')] [System.Net.IPAddress[]]$NotInSubnet ) begin { # Determine which of the subnet paramters were set, if any. $InSubnetSet = $PSBoundParameters.ContainsKey('InSubnet') -and ($Null -ne $InSubnet) $NotInSubnetSet = $PSBoundParameters.ContainsKey('NotInSubnet') -and ($Null -ne $NotInSubnet) # If both subnet parameters are not set, we meet the requirements. $RequirementsMet = (-not $InSubnetSet) -and (-not $NotInSubnetSet) } process { if (-not $RequirementsMet) { # One or more of the subnet parameters was set. We actually have to do some work. :( if ($InSubnetSet) { $TiasArgs = @{ IPAddress = $IPAddress SubnetAddress = $InSubnet[0] SubnetMask = $InSubnet[1] } $RequirementsMet = $RequirementsMet -or (Test-IPAddressInSubnet @TiasArgs) } if ($RequireNotInSubnetSet) { $TiasArgs = @{ IPAddress = $IPAddress SubnetAddress = $NotInSubnet[0] SubnetMask = $NotInSubnet[1] } $RequirementsMet = $RequirementsMet -or (-not (Test-IPAddressInSubnet @TiasArgs)) } } return $RequirementsMet } } New-Alias -Name 'tiarm' -Value 'Test-IPAddressRequirementsMet' |