Powershell get ipv4 address into a variable

Question

Is there an easy way in powershell 3.0 Windows 7 to get the local computer\'s ipv4 address into a variable?

Answer 1

I recently had the same issue. So I wrote a script to parse it from the ipconfig /all output. This script is easily modifiable to obtain any of the parameters of the interfaces and it works on Windows 7 also.

1. Get output of IP config in LineNumber | Line format

$ip_config = $(ipconfig /all | % {$_ -split "rn"} | Select-String -Pattern ".*" | select LineNumber, Line)

2. Get list of interfaces (+ last line of ipconfig output) in LineNumber | Line format

$interfaces = $($ip_config | where {$_.Line -notmatch '^\s*$'} | where {$_.Line -notmatch '^\s'}) + $($ip_config | Select -last 1)

3. Filter through the interfaces list for the specific interface you want

$LAN = $($interfaces | where {$_.Line -match 'Wireless Network Connection:$'})

4. Get the start and end line numbers of chosen interface from output

$i = $interfaces.IndexOf($LAN)
$start = $LAN.LineNumber
$end = $interfaces[$i+1].LineNumber

5. Pick the lines from start..end

$LAN = $ip_config | where {$_.LineNumber -in ($start..$end)}

6. Get IP(v4) address field (returns null if no IPv4 address present)

$LAN_IP = @($LAN | where {$_ -match 'IPv4.+:\s(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})'})
$LAN_IP = &{If ($LAN_IP.Count -gt 0) {$Matches[1]} Else {$null}}