From 4de7ec9831bc18352c31e67f27d8a31e46414a66 Mon Sep 17 00:00:00 2001
From: Markus Fleschutz <markus.fleschutz@gmail.com>
Date: Sun, 24 Mar 2024 18:13:45 +0100
Subject: [PATCH] Update list-dns-servers.ps1

---
 scripts/list-dns-servers.ps1 | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/scripts/list-dns-servers.ps1 b/scripts/list-dns-servers.ps1
index 0f780989..07170f62 100755
--- a/scripts/list-dns-servers.ps1
+++ b/scripts/list-dns-servers.ps1
@@ -2,13 +2,13 @@
 .SYNOPSIS
 	Lists DNS servers
 .DESCRIPTION
-	This PowerShell script measures the latency of public and free DNS servers and lists it.
+	This PowerShell script list public and free DNS servers together with IPv4 addresses and measured latency.
 .EXAMPLE
 	PS> ./list-dns-servers.ps1
       
-	Provider                IPv4                             Latency
-	--------                ----                             -------
-	AdGuard DNS (Cyprus)    94.140.14.14 / 94.140.15.15      222 / 205 ms
+	DNS PROVIDER            IPv4 ADDRESSES                   LATENCY
+	------------            ---- ---------                   -------
+	AdGuard DNS (Cyprus)    94.140.14.14 · 94.140.15.15      222 · 205 ms
 	...
 .LINK
 	https://github.com/fleschutz/PowerShell
@@ -16,24 +16,24 @@
 	Author: Markus Fleschutz | License: CC0
 #>
 
-function CheckDNSServer { param($Provider, $IPv4Pri, $IPv4Sec)
-	$SW=[system.diagnostics.stopwatch]::startNew();$null=(nslookup fleschutz.de $IPv4Pri 2>$null);[int]$Lat1=$SW.Elapsed.TotalMilliseconds
+function MeasureDNSServer([string]$provider, [string]$IPv4Pri, [string]$IPv4Sec) {
+	$time=[system.diagnostics.stopwatch]::startNew();$null=(nslookup fleschutz.de $IPv4Pri 2>$null);[int]$lat1=$time.Elapsed.TotalMilliseconds
 
-	$SW=[system.diagnostics.stopwatch]::startNew();$null=(nslookup fleschutz.de $IPv4Sec 2>$null);[int]$Lat2=$SW.Elapsed.TotalMilliseconds
+	$time=[system.diagnostics.stopwatch]::startNew();$null=(nslookup fleschutz.de $IPv4Sec 2>$null);[int]$lat2=$time.Elapsed.TotalMilliseconds
 
-	New-Object PSObject -Property @{ Provider=$Provider; IPv4="$IPv4Pri / $IPv4Sec"; Latency="$Lat1 / $Lat2 ms" }
+	New-Object PSObject -Property @{ 'DNS PROVIDER'=$provider; 'IPv4 ADDRESSES'="$IPv4Pri · $IPv4Sec"; LATENCY="$lat1 · $lat2 ms" }
 }
 
 function List-DNS-Servers {
 	Write-Progress "Loading data/public-dns-servers.csv..."
 	$table = Import-CSV "$PSScriptRoot/../data/public-dns-servers.csv"
 	Write-Progress -completed "Done."
-	foreach($row in $table) { CheckDNSServer $row.PROVIDER $row.IPv4_PRI $row.IPv4_SEC }
+	foreach($row in $table) { MeasureDNSServer $row.PROVIDER $row.IPv4_PRI $row.IPv4_SEC }
 	
 }
  
 try {
-	List-DNS-Servers | Format-Table -property @{e='Provider';width=50},@{e='IPv4';width=32},@{e='Latency';width=15}
+	List-DNS-Servers | Format-Table -property @{e='DNS PROVIDER';width=50},@{e='IPv4 ADDRESSES';width=32},@{e='LATENCY';width=15}
 	exit 0 # success
 } catch {
 	"⚠️ Error in line $($_.InvocationInfo.ScriptLineNumber): $($Error[0])"