Set DNS timeout to 1 second

CHANGELOG.md

@@ -2,6 +2,11 @@
 All notable changes to this project will be documented in this file.
 I will do my best to guarantee that this project adheres to [Semantic Versioning](http://semver.org/) after 1.0.0, but please do read change log before updating.
 
+## 0.10.2
+
+### Changed
+- Set DNS timeout to 1 second.
+
 ## 0.10.1
 
 ### Fixed

src/Opt.swift

@@ -17,4 +17,6 @@ public struct Opt {
     public static var MAXHTTPContentBlockLength = 10240
 
     public static var RejectAdapterDefaultDelay = 300
+
+    public static var DNSTimeout = 1
 }

src/Tunnel/Tunnel.swift

@@ -150,7 +150,7 @@ public class Tunnel: NSObject, SocketDelegate {
         observer?.signal(.receivedRequest(request, from: from, on: self))
 
         if !request.isIP() {
-            _ = Resolver.resolve(hostname: request.host) { [weak self] resolver, err in
+            _ = Resolver.resolve(hostname: request.host, timeout: Opt.DNSTimeout) { [weak self] resolver, err in
                 QueueFactory.getQueue().async {
                     if err != nil {
                         request.ipAddress = ""