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//
// Interface+Extension.swift
// WireGuard
//
// Created by Eric Kuck on 8/15/18.
// Copyright © 2018 WireGuard LLC. All rights reserved.
//
import Foundation
extension Interface {
func validate() throws {
guard let privateKey = privateKey, !privateKey.isEmpty else {
throw InterfaceValidationError.emptyPrivateKey
}
guard privateKey.isBase64() else {
throw InterfaceValidationError.invalidPrivateKey
}
try addresses?.commaSeparatedToArray().forEach { address in
do {
try _ = CIDRAddress(stringRepresentation: address)
} catch {
throw InterfaceValidationError.invalidAddress(cause: error)
}
}
try dns?.commaSeparatedToArray().forEach { address in
do {
try _ = Endpoint(endpointString: address, needsPort: false)
} catch {
throw InterfaceValidationError.invalidDNSServer(cause: error)
}
}
}
func parse(attribute: Attribute) throws {
switch attribute.key {
case .address:
addresses = attribute.stringValue
case .dns:
dns = attribute.stringValue
case .listenPort:
if let port = Int16(attribute.stringValue) {
listenPort = port
}
case .mtu:
if let mtu = Int32(attribute.stringValue) {
self.mtu = mtu
}
case .privateKey:
privateKey = attribute.stringValue
default:
throw TunnelParseError.invalidLine(attribute.line)
}
}
func export() -> String {
var exportString = "[Interface]\n"
if let privateKey = privateKey {
exportString.append("PrivateKey=\(privateKey)\n")
}
if let addresses = addresses {
exportString.append("Address=\(addresses)\n")
}
if let dns = dns {
exportString.append("DNS=\(dns)\n")
}
if mtu > 0 {
exportString.append("MTU=\(mtu)\n")
}
if listenPort > 0 {
exportString.append("ListenPort=\(listenPort)\n")
}
exportString.append("\n")
return exportString
}
}
enum InterfaceValidationError: Error {
case emptyPrivateKey
case invalidPrivateKey
case invalidAddress(cause: Error)
case invalidDNSServer(cause: Error)
}
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