Converting input to integer and doing arithmetic in powershell - powershell

Question

not sure how to convert a string to an integer and then do an "add 1" to it. Here's what I'm trying to do:
1) Capture an IP address from a prompt
2) create list of variables with the increasing IPs as such:
$startIP = Read-Host
$ip1 = $startIP
$ip2 = $ip1 + 1
$ip3 = $ip2 + 1
So for example, we'd input 10.0.0.1, and then $ip2 would be 10.0.0.2 and so on.
I know I need to convert this to an integer after reading the input, but am unsure how to do that. Many thanks!

Answer 1

Found these functions that converts an IP to an Int64 and back
Function Convert-IpToInt64 () {
param ([String]$ip)
process {
$octets = $ip.split(".")
return [int64]([int64]$octets[0]*16777216 +[int64]$octets[1]*65536 +[int64]$octets[2]*256 +[int64]$octets[3])
}
}
Function Convert-Int64ToIp() {
param ([int64]$int)
process {
return (([math]::truncate($int/16777216)).tostring()+"."+([math]::truncate(($int%16777216)/65536)).tostring()+"."+([math]::truncate(($int%65536)/256)).tostring()+"."+([math]::truncate($int%256)).tostring() )
}
}
With that you can now convert the input to an something that can be incremented
$startIP = Read-Host
$ip1 = Convert-IpToInt64 $startIP
$ip2 = $ip1 + 1
$ip3 = $ip2 + 1