Update ip-settings.ps1

ip-settings.ps1

@@ -3,6 +3,14 @@
 function Write-OK($msg)   { Write-Host "  [OK]  $msg" -ForegroundColor Green }
 function Write-Info($msg) { Write-Host "  [..]  $msg" -ForegroundColor Yellow }
 function Write-Err($msg)  { Write-Host "  [!!]  $msg" -ForegroundColor Red }
+function Write-Warn($msg) { Write-Host "  [!!]  $msg" -ForegroundColor DarkYellow }
+
+function Test-IPInUse($ip) {
+    Write-Info "Checking if $ip is already in use on the network..."
+    $ping = New-Object System.Net.NetworkInformation.Ping
+    $result = $ping.Send($ip, 1000)
+    return ($result.Status -eq "Success")
+}
 
 # Admin check
 $id = [Security.Principal.WindowsIdentity]::GetCurrent()
@@ -60,7 +68,28 @@ $nicName = $selected.Adapter.Name
 $nicIdx  = $selected.Adapter.InterfaceIndex
 Write-OK "Selected: $nicName  (Index $nicIdx)"
 
-# STEP 3 - Choose profile
+# STEP 3 - Show current config
+Write-Host ""
+Write-Host "  Current Configuration:" -ForegroundColor Magenta
+Write-Host "  ----------------------------------------" -ForegroundColor DarkGray
+
+$curIP    = Get-NetIPAddress    -InterfaceIndex $nicIdx -AddressFamily IPv4 -ErrorAction SilentlyContinue
+$curIface = Get-NetIPInterface  -InterfaceIndex $nicIdx -AddressFamily IPv4 -ErrorAction SilentlyContinue
+$curRoute = Get-NetRoute        -InterfaceIndex $nicIdx -DestinationPrefix "0.0.0.0/0" -ErrorAction SilentlyContinue
+$curDns   = Get-DnsClientServerAddress -InterfaceIndex $nicIdx -AddressFamily IPv4 -ErrorAction SilentlyContinue
+
+$curMode    = if ($curIface -and $curIface.Dhcp -eq "Enabled") { "DHCP (Automatic)" } else { "Static" }
+$curIPStr   = if ($curIP)    { "$($curIP.IPAddress)/$($curIP.PrefixLength)" } else { "Not assigned" }
+$curGWStr   = if ($curRoute) { $curRoute.NextHop } else { "None" }
+$curDnsStr  = if ($curDns -and $curDns.ServerAddresses) { $curDns.ServerAddresses -join " / " } else { "Automatic" }
+
+Write-Host ("  Mode    : {0}" -f $curMode)    -ForegroundColor White
+Write-Host ("  IP      : {0}" -f $curIPStr)   -ForegroundColor White
+Write-Host ("  Gateway : {0}" -f $curGWStr)   -ForegroundColor White
+Write-Host ("  DNS     : {0}" -f $curDnsStr)  -ForegroundColor White
+Write-Host "  ----------------------------------------" -ForegroundColor DarkGray
+
+# STEP 4 - Choose profile
 Write-Host ""
 Write-Host "  Profiles:" -ForegroundColor White
 Write-Host "  [1]  Camera Control  ->  192.168.178.22  /24   GW: 192.168.178.1   DNS: 192.168.178.10 / 192.168.178.14" -ForegroundColor White
@@ -70,7 +99,25 @@ Write-Host "  [4]  DHCP (automatic)
 Write-Host ""
 $profileChoice = Read-Host "  Enter profile number"
 
-# STEP 4 - Apply
+# STEP 5 - Confirmation
+$profileNames = @{ "1" = "Camera Control  ->  192.168.178.22 /24"; "2" = "LAN Profile 2   ->  192.168.1.222 /24"; "3" = "DHCP (automatic)"; "4" = "DHCP + custom DNS" }
+$chosenName = if ($profileNames.ContainsKey($profileChoice)) { $profileNames[$profileChoice] } else { "Unknown" }
+
+Write-Host ""
+Write-Host "  You are about to apply:" -ForegroundColor Yellow
+Write-Host "  Profile  : $chosenName" -ForegroundColor Yellow
+Write-Host "  Adapter  : $nicName" -ForegroundColor Yellow
+Write-Host ""
+$confirm = Read-Host "  Confirm? (Y/N)"
+if ($confirm -notmatch "^[Yy]$") {
+    Write-Host ""
+    Write-Info "Cancelled. No changes were made."
+    Write-Host ""
+    Read-Host "Press Enter to exit"
+    exit 0
+}
+
+# STEP 6 - Apply
 Write-Info "Applying settings..."
 
 if ($profileChoice -eq "1") {
@@ -80,6 +127,21 @@ if ($profileChoice -eq "1") {
     $dns1    = "192.168.178.10"
     $dns2    = "192.168.178.14"
 
+    if (Test-IPInUse $newIP) {
+        Write-Host ""
+        Write-Warn "WARNING: $newIP is already responding on the network!"
+        Write-Warn "Another device may be using this IP address."
+        Write-Host ""
+        $forceApply = Read-Host "  Apply anyway? (Y/N)"
+        if ($forceApply -notmatch "^[Yy]$") {
+            Write-Info "Cancelled. No changes were made."
+            Read-Host "Press Enter to exit"
+            exit 0
+        }
+    } else {
+        Write-OK "$newIP is free - no conflict detected"
+    }
+
     Remove-NetIPAddress -InterfaceIndex $nicIdx -Confirm:$false -ErrorAction SilentlyContinue
     Remove-NetRoute     -InterfaceIndex $nicIdx -Confirm:$false -ErrorAction SilentlyContinue
     New-NetIPAddress -InterfaceIndex $nicIdx -IPAddress $newIP -PrefixLength $prefix -DefaultGateway $gateway | Out-Null
@@ -96,6 +158,21 @@ elseif ($profileChoice -eq "2") {
     $prefix  = 24
     $gateway = "192.168.1.1"
 
+    if (Test-IPInUse $newIP) {
+        Write-Host ""
+        Write-Warn "WARNING: $newIP is already responding on the network!"
+        Write-Warn "Another device may be using this IP address."
+        Write-Host ""
+        $forceApply = Read-Host "  Apply anyway? (Y/N)"
+        if ($forceApply -notmatch "^[Yy]$") {
+            Write-Info "Cancelled. No changes were made."
+            Read-Host "Press Enter to exit"
+            exit 0
+        }
+    } else {
+        Write-OK "$newIP is free - no conflict detected"
+    }
+
     Remove-NetIPAddress -InterfaceIndex $nicIdx -Confirm:$false -ErrorAction SilentlyContinue
     Remove-NetRoute     -InterfaceIndex $nicIdx -Confirm:$false -ErrorAction SilentlyContinue
     New-NetIPAddress -InterfaceIndex $nicIdx -IPAddress $newIP -PrefixLength $prefix -DefaultGateway $gateway | Out-Null