Deadlock Region Blocker

deadlock-regions.ps1

<#
Deadlock Region Blocker
A simple script to block Deadlock servers within one or more regions.

USAGE: powershell -ExecutionPolicy Bypass .\deadlock-regions.ps1

WARNING
-------
If you enter a lobby hosted in a blocked region (e.g., if two of your friends create a lobby and it is in a blocked region),
you will still be able to enter, but you will be routed to the closest possible region.

The best way to avoid this is for everyone to block the same regions,
or for at least two people with blocked regions to create a lobby first.

----------------------------------------------------------------------------------------------------------------------------------
KNOWN REGIONS
curl -s https://api.steampowered.com/ISteamApps/GetSDRConfig/v1/?appid=1422450 | jq '.pops | with_entries(.value = .value.desc)'
{
  "ams": "Amsterdam (Netherlands)",
  "atl": "Atlanta (Georgia)",
  "dfw": "Dallas (Texas)",
  "dxb": "Dubai (United Arab Emirates)",
  "eat": "Wenatchee (Washington)",
  "eze": "Buenos Aires (Argentina)",
  "fra": "Frankfurt (Germany)",
  "fsn": "Falkenstein (Germany)",
  "gru": "Sao Paulo (Brazil)",
  "hel": "Helsinki (Finland)",
  "hkg": "Hong Kong",
  "iad": "Sterling (Virginia)",
  "jnb": "Johannesburg (South Africa)",
  "lax": "Los Angeles (California)",
  "lhr": "London (England)",
  "lim": "Lima (Peru)",
  "mad": "Madrid (Spain)",
  "ord": "Chicago (Illinois)",
  "par": "Paris (France)",
  "scl": "Santiago (Chile)",
  "sea": "Seattle (Washington)",
  "seo": "Seoul (South Korea)",
  "sgp": "Singapore",
  "sto": "Stockholm - Kista (Sweden)",
  "syd": "Sydney (Australia)",
  "tyo": "Tokyo Koto City (Japan)",
  "vie": "Vienna (Austria)",
  "waw": "Warsaw (Poland)",
  "bom2": "Mumbai (India)",
  "maa2": "Chennai - Ambattur (India)",
  "sto2": "Stockholm - Bromma (Sweden)",
  "ams4": "Multiplay Amsterdam (Netherlands)",
  "hkg4": "Multiplay Hong Kong"
}
----------------------------------------------------------------------------------------------------------------------------------

To block regions simply change the preconfigured list in `$BlacklistedPops = @("eze", "gru", "lim", "scl")`.
Example: To block `Amsterdam (Netherlands)` and `Atlanta (Georgia)`: $BlacklistedPops = @("ams", "atl")
#>

$ErrorActionPreference = "Stop"

try {
	# Self-Elevation Wrapper
	$IsAdmin = ([Security.Principal.WindowsPrincipal][Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)

	if (-not $IsAdmin) {
		Write-Host "Requesting administrative privileges..."
		Start-Process powershell -Verb RunAs -ArgumentList "-ExecutionPolicy Bypass -File `"$PSCommandPath`""
		$global:ScriptSilentExit = $true
		exit
	}

	# Configuration
	$BlacklistedPops = @("eze", "gru", "lim", "scl")
	$RuleGroupName = "Deadlock-Blacklisted-Regions"
	$RulePrefix = "! [Region Block]"
	$Url = "https://api.steampowered.com/ISteamApps/GetSDRConfig/v1/?appid=1422450"

	# Remove old rules
	Write-Host "Cleaning existing rules for group: $RuleGroupName"
	Get-NetFirewallRule -Group $RuleGroupName -ErrorAction SilentlyContinue | Remove-NetFirewallRule

	# Download config
	Write-Host "Downloading Steam SDR config..."
	$response = Invoke-RestMethod -Uri $Url -TimeoutSec 10

	if (-not $response.success -or -not $response.pops) {
		throw "Invalid API response."
	}

	# Process POPs
	foreach ($pop in $BlacklistedPops) {

		$popData = $response.pops.$pop
		if (-not $popData -or -not $popData.relays) {
			Write-Host "POP '$pop' not found or has no relays."
			continue
		}

		Write-Host "Processing POP: $pop"

		foreach ($relay in $popData.relays) {

			$ip = $relay.ipv4
			$portStart = $relay.port_range[0]
			$portEnd = $relay.port_range[1]

			$portRangeString = "$portStart-$portEnd"

			# $ruleNameIn = "$RulePrefix <IN> $pop ($ip, $portRangeString)"
			$ruleNameOut = "$RulePrefix <OUT> $pop ($ip, $portRangeString)"

			# Inbound rule
			<# New-NetFirewallRule `
			-DisplayName $ruleNameIn `
			-Group $RuleGroupName `
			-Direction Inbound `
			-RemoteAddress $ip `
			-Protocol UDP `
			-RemotePort $portRangeString `
			-Action Block `
			-Profile Any `
			-Description "Added at $(Get-Date -Format 'yyyy-MM-dd')" `
			*> $null #>

			# Outbound rule
			New-NetFirewallRule `
				-DisplayName $ruleNameOut `
				-Group $RuleGroupName `
				-Direction Outbound `
				-RemoteAddress $ip `
				-Protocol UDP `
				-RemotePort $portRangeString `
				-Action Block `
				-Profile Any `
				-Description "Added at $(Get-Date -Format 'yyyy-MM-dd')" `
				*> $null

			Write-Host "  Blocked $ip ($portRangeString)"
		}
	}

	Write-Host "`nFinished updating Steam SDR blacklist rules."

	
}
catch {
	Write-Host ""
	Write-Host "ERROR DETECTED" -ForegroundColor Red
	Write-Host "Message: $($_.Exception.Message)" -ForegroundColor Yellow
	Write-Host "Line: $($_.InvocationInfo.ScriptLineNumber)"
	Write-Host "Code: $($_.InvocationInfo.Line.Trim())"
	$global:ScriptHadError = $true
}
finally {
	if ($global:ScriptSilentExit) {
		exit 0
	}

	Write-Host ""
	# Write-Host "Press any key to exit..."
	# $null = $Host.UI.RawUI.ReadKey("NoEcho,IncludeKeyDown")
	Write-Host "Press INTRO to exit..."
	$null = Read-Host

	if ($global:ScriptHadError) {
		exit 1
	}
}