IPNetCalc.ps1
|
class IPv4Network { [ipaddress]$IPAddress [string]$CIDR [ipaddress]$Mask [ValidateRange(0, 32)][int]$PrefixLength [ipaddress]$Subnet [ipaddress]$WildCard [ipaddress]$Broadcast [int64]$Count IPv4Network([string]$CIDR) { $this.IPAddress, $this.PrefixLength = $CIDR.Split([char[]]'\/') if (![IPv4Network]::ip_is_v4($this.IPAddress)) { throw "is not ipv4 $($this.IPAddress)" } $this.Mask = [IPAddress][string](4gb - [bigint]::Pow(2, 32 - $this.PrefixLength)) $this.WildCard = [byte[]]$this.Mask.GetAddressBytes().ForEach({ 255 - $_ }) $this.Subnet = $this.IPAddress.Address -band $this.Mask.Address $this.Broadcast = $this.IPAddress.Address -bor $this.WildCard.Address $this.CIDR = "$($this.Subnet)/$($this.PrefixLength)" $this.Count = $this.GetCount() } IPv4Network([ipaddress]$IPAddress, [int16]$PrefixLength) { if (![IPv4Network]::ip_is_v4($IPAddress)) { throw "is not ipv4 $IPAddress" } else { $this.IPAddress = $IPAddress } $this.PrefixLength = $PrefixLength $this.Mask = [IPAddress][string](4gb - [bigint]::Pow(2, 32 - $this.PrefixLength)) $this.WildCard = [byte[]]$this.Mask.GetAddressBytes().ForEach({ 255 - $_ }) $this.Subnet = $this.IPAddress.Address -band $this.Mask.Address $this.Broadcast = $this.IPAddress.Address -bor $this.WildCard.Address $this.CIDR = "$($this.Subnet)/$PrefixLength" $this.Count = $this.GetCount() } IPv4Network([ipaddress]$IPAddress, [ipaddress]$Mask) { if (![IPv4Network]::ip_is_v4($IPAddress)) { throw "is not ipv4 $IPAddress" } else { $this.IPAddress = $IPAddress } if (![IPv4Network]::check_mask($Mask)) { throw "invalid mask $Mask" } else { $this.PrefixLength = [IPv4Network]::get_bin_string($Mask).TrimEnd('0').Length $this.Mask = $Mask } $this.WildCard = [byte[]]$this.Mask.GetAddressBytes().ForEach({ 255 - $_ }) $this.Subnet = $IPAddress.Address -band $Mask.Address $this.Broadcast = $this.IPAddress.Address -bor $this.WildCard.Address $this.CIDR = "$($this.Subnet)/$($this.PrefixLength)" $this.Count = $this.GetCount() } [bool] Contains([ipaddress]$ip) { [int64]$i_ip = [IPv4Network]::get_ip_int64($ip) [int64]$i_Subnet = [IPv4Network]::get_ip_int64($this.Subnet) [int64]$i_Broadcast = [IPv4Network]::get_ip_int64($this.Broadcast) return ($i_Subnet -le $i_ip) -and ($i_ip -le $i_Broadcast) } [ipaddress[]] GetIParray() { [System.Collections.Generic.List[string]]$ipaddresses = @() [int64]$a = [IPv4Network]::get_ip_int64($this.Subnet) [int64]$z = [IPv4Network]::get_ip_int64($this.Broadcast) for ([int64]$i = $a; $i -le $z; $i++) { $ipaddresses.Add($i) } return $ipaddresses } [IPv4Network] Add([int64]$i) { [ipaddress]$r_ip = [IPv4Network]::get_ip_int64($this.IPAddress) + $i $this.IPAddress = [IPv4Network]::get_reversed_ip($r_ip) return $this } [IPv4Network] Subtract([int64]$i) { [ipaddress]$r_ip = [IPv4Network]::get_ip_int64($this.IPAddress) - $i $this.IPAddress = [IPv4Network]::get_reversed_ip($r_ip) return $this } [int64] GetCount() { $o1, $o2, $o3, $o4 = $this.WildCard.GetAddressBytes() return $o1 * 16mb + $o2 * 64kb + $o3 * 256 + $o4 + 1 } [string] ToString() { return $this.CIDR } [bool] Equals($other) { return ($this.CIDR -eq $other.CIDR) } static [IPv4Network] op_Addition([IPv4Network]$ip, [int64]$i) { return $ip.Add($i) } static [IPv4Network] op_Subtraction([IPv4Network]$ip, [int64]$i) { return $ip.Subtract($i) } static [ipaddress] get_reversed_ip([ipaddress]$ip) { return [string]$ip.Address } static [int64] get_ip_int64([ipaddress]$ip) { return [IPv4Network]::get_reversed_ip($ip).Address } static [int64] get_net_int64([IPv4Network]$net) { return [IPv4Network]::get_ip_int64($net.Subnet) -band [IPv4Network]::get_ip_int64($net.Broadcast) } static [string] get_bin_string([ipaddress]$ip) { return [System.Convert]::ToString([IPv4Network]::get_ip_int64($ip), 2) } static [bool] check_mask([ipaddress]$ip) { return ![IPv4Network]::get_bin_string($ip).TrimEnd('0').Contains('0') } static [bool] ip_is_v4([ipaddress]$ip) { return $ip.AddressFamily -eq [System.Net.Sockets.AddressFamily]::InterNetwork } } Function Get-IPv4Network { <# .DESCRIPTION calculation of an ip network .EXAMPLE Get-IPv4Network -CIDR 198.18.0.0/28 IPAddress : 198.18.0.0 CIDR : 198.18.0.0/28 Mask : 255.255.255.240 PrefixLength : 28 Subnet : 198.18.0.0 WildCard : 0.0.0.15 Broadcast : 198.18.0.15 Count : 16 .EXAMPLE Get-IPv4Network -CIDR 198.18.0.0/15 | % Contains 198.19.1.1 True .EXAMPLE Get-IPv4Network -CIDR 198.18.0.0/30 | % GetIPArray | ft IPAddressToString IPAddressToString ----------------- 198.18.0.0 198.18.0.1 198.18.0.2 198.18.0.3 .EXAMPLE Get-NetRoute -AddressFamily IPv4 | Select-Object -Property *,@{n='net';e={Get-IPv4Network -CIDR $_.DestinationPrefix}} | ? {$_.net.Contains('8.8.8.8')} | Sort-Object -Property @{e={$_.net.PrefixLength};asc=$false},ifMetric | ft InterfaceMetric,DestinationPrefix,NextHop InterfaceMetric DestinationPrefix NextHop --------------- ----------------- ------- 35 0.0.0.0/0 192.168.0.1 25 0.0.0.0/0 192.168.0.1 #> [CmdletBinding()] [Alias("ipcalc")] param( [Parameter(Mandatory, ParameterSetName = 'CIDR', Position = 0, ValueFromPipelineByPropertyName)][Alias('DestinationPrefix')][string]$CIDR, [Parameter(Mandatory, ParameterSetName = 'Mask', Position = 1)][Parameter(Mandatory, ParameterSetName = 'PrefixLength', Position = 1)][IPAddress]$IPAddress, [Parameter(Mandatory, ParameterSetName = 'Mask', Position = 2)][IPAddress]$Mask, [Parameter(Mandatory, ParameterSetName = 'PrefixLength', Position = 2)][int]$PrefixLength ) process { New-Object -TypeName IPv4Network -ArgumentList ([object[]]$PSBoundParameters.Values) } } |