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//
// ObfuscatorPortSelector.swift
// MullvadVPN
//
// Created by Jon Petersson on 2024-11-01.
// Copyright © 2025 Mullvad VPN AB. All rights reserved.
//
import MullvadSettings
import MullvadTypes
protocol RelayObfuscating {
var relays: REST.ServerRelaysResponse { get }
var tunnelSettings: LatestTunnelSettings { get }
var connectionAttemptCount: UInt { get }
func obfuscate() throws -> RelayObfuscation
}
struct RelayObfuscation {
let allRelays: REST.ServerRelaysResponse
let obfuscatedRelays: REST.ServerRelaysResponse
let port: RelayConstraint<UInt16>
var method: WireGuardObfuscationState
}
struct RelayObfuscator: RelayObfuscating {
let relays: REST.ServerRelaysResponse
let tunnelSettings: LatestTunnelSettings
let connectionAttemptCount: UInt
let obfuscationBypass: any ObfuscationProviding
func obfuscate() -> RelayObfuscation {
let obfuscationMethod = ObfuscationMethodSelector.obfuscationMethodBy(
connectionAttemptCount: connectionAttemptCount,
tunnelSettings: tunnelSettings,
obfuscationBypass: obfuscationBypass
)
return switch obfuscationMethod {
case .udpOverTcp:
UdpOverTcpObfuscator(
relays: relays,
tunnelSettings: tunnelSettings,
connectionAttemptCount: connectionAttemptCount
).obfuscate()
case .shadowsocks:
ShadowsocksObfuscator(
relays: relays,
tunnelSettings: tunnelSettings,
connectionAttemptCount: connectionAttemptCount
).obfuscate()
case .quic:
QuicObfuscator(
relays: relays,
tunnelSettings: tunnelSettings,
connectionAttemptCount: connectionAttemptCount
).obfuscate()
default:
RelayObfuscation(
allRelays: relays,
obfuscatedRelays: relays,
port: tunnelSettings.relayConstraints.port,
method: obfuscationMethod
)
}
}
}
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