Add option to skip host name scanning

EvilLimiter.Windows/App.config

@@ -4,10 +4,11 @@
     <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.7.2" />
   </startup>
   <appSettings>
-    <add key="StartRoutingServiceOnStartup" value="True"/>
+    <add key="StartRoutingServiceOnStartup" value="true"/>
     <add key="ColorStyle" value="Default" />
     <add key="ScanSendInterval" value="10" />
     <add key="ScanReplyTimeout" value="2000" />
+    <add key="ScanResolveHostnames" value="True"/>
     <add key="SpoofSendInterval" value="4000" />
     <add key="SpoofRestoreSendCount" value="3" />
     <add key="SpoofRestoreSendInterval" value="50" />

EvilLimiter.Windows/Common/Config.cs

@@ -32,6 +32,12 @@ public static int ScanReplyTimeout
             set { lock (_scanReplyTimeoutLock) _scanReplyTimeout = value; }
         }
 
+        public static bool ScanResolveHostnames
+        {
+            get { lock (_scanResolveHostnamesLock) return _scanResolveHostnames; }
+            set { lock (_scanResolveHostnamesLock) _scanResolveHostnames = value; }
+        }
+
 
         public static int SpoofSendInterval
         {
@@ -69,6 +75,8 @@ public static int BandwidthMonitorUpdateInterval
         private static readonly object _scanSendIntervalLock;
         private static int _scanReplyTimeout;
         private static readonly object _scanReplyTimeoutLock;
+        private static bool _scanResolveHostnames;
+        private static readonly object _scanResolveHostnamesLock;
 
         private static int _spoofSendInterval;
         private static readonly object _spoofSendIntervalLock;
@@ -88,6 +96,7 @@ static Config()
             _colorStyle = MetroColorStyle.Default;
             _scanSendInterval = 10;
             _scanReplyTimeout = 2000;
+            _scanResolveHostnames = true;
             _spoofSendInterval = 4000;
             _spoofRestoreSendCount = 3;
             _spoofRestoreSendInterval = 50;
@@ -97,10 +106,13 @@ static Config()
             _colorStyleLock = new object();
             _scanSendIntervalLock = new object();
             _scanReplyTimeoutLock = new object();
+            _scanResolveHostnamesLock = new object();
             _spoofSendIntervalLock = new object();
             _spoofRestoreSendCountLock = new object();
             _spoofRestoreSendIntervalLock = new object();
             _bandwidthMonitorUpdateIntervalLock = new object();
+
+            System.Console.WriteLine(true.ToString());
         }
 
 
@@ -117,6 +129,7 @@ public static bool Read()
 
                 ScanSendInterval = int.Parse(config.AppSettings.Settings["ScanSendInterval"].Value);
                 ScanReplyTimeout = int.Parse(config.AppSettings.Settings["ScanReplyTimeout"].Value);
+                ScanResolveHostnames = bool.Parse(config.AppSettings.Settings["ScanResolveHostnames"].Value);
 
                 SpoofSendInterval = int.Parse(config.AppSettings.Settings["SpoofSendInterval"].Value);
                 SpoofRestoreSendCount = int.Parse(config.AppSettings.Settings["SpoofRestoreSendCount"].Value);
@@ -145,6 +158,7 @@ public static bool Write()
 
                 config.AppSettings.Settings["ScanSendInterval"].Value = ScanSendInterval.ToString();
                 config.AppSettings.Settings["ScanReplyTimeout"].Value = ScanReplyTimeout.ToString();
+                config.AppSettings.Settings["ScanResolveHostnames"].Value = ScanResolveHostnames.ToString();
 
                 config.AppSettings.Settings["SpoofSendInterval"].Value = SpoofSendInterval.ToString();
                 config.AppSettings.Settings["SpoofRestoreSendCount"].Value = SpoofRestoreSendCount.ToString();

EvilLimiter.Windows/Forms/FrmMain.cs

@@ -77,6 +77,7 @@ private void UpdateConfigDisplay()
 
             tbScanSendInterval.Text = Config.ScanSendInterval.ToString();
             tbScanReplyTimeout.Text = Config.ScanReplyTimeout.ToString();
+            cbScanResolveHostnames.Checked = Config.ScanResolveHostnames;
             tbSpoofSendInterval.Text = Config.SpoofSendInterval.ToString();
             tbSpoofRestoreSendCount.Text = Config.SpoofRestoreSendCount.ToString();
             tbSpoofRestoreSendInterval.Text = Config.SpoofRestoreSendInterval.ToString();
@@ -362,6 +363,7 @@ private void BtnApplySettings_Click(object sender, EventArgs e)
             Config.ColorStyle = colorStyle;
             Config.ScanSendInterval = scanSendInterval;
             Config.ScanReplyTimeout = scanReplyTimeout;
+            Config.ScanResolveHostnames = cbScanResolveHostnames.Checked;
             Config.SpoofSendInterval = spoofSendInterval;
             Config.SpoofRestoreSendCount = spoofRestoreSendCount;
             Config.SpoofRestoreSendInterval = spoofRestoreSendInterval;

EvilLimiter.Windows/Forms/FrmScan.cs

@@ -1,4 +1,5 @@
-using EvilLimiter.Windows.Data;
+using EvilLimiter.Windows.Common;
+using EvilLimiter.Windows.Data;
 using EvilLimiter.Windows.Networking;
 using EvilLimiter.Windows.Utilities;
 using MetroFramework;
@@ -104,7 +105,7 @@ private void HostScanner_HostScanned(object sender, HostScannedEventArgs e)
                 pbScan.Maximum = e.Total;
                 pbScan.Value = e.Current;
 
-                if (e.Current == e.Total)
+                if (e.Current == e.Total && Config.ScanResolveHostnames)
                 {
                     btnScan.Enabled = false;
                     lblStatus.Text = "Resolving hostnames...";
@@ -144,7 +145,7 @@ private void BtnScan_Click(object sender, System.EventArgs e)
                     range = _networkInfo.SubnetRange;
 
                 ChangeScanState(ScanState.Scan);
-                _hostScanner.Scan(range);
+                _hostScanner.Scan(range, Config.ScanResolveHostnames);
             }
         }
 

EvilLimiter.Windows/Networking/HostScanner.cs

@@ -52,7 +52,7 @@ public HostScanner(NetworkInformation netInfo)
 
 
 
-        public void Scan(ICollection<IpV4Address> addresses)
+        public void Scan(ICollection<IpV4Address> addresses, bool resolveHostnames = true)
         {
             if (IsScanning)
                 return;
@@ -137,8 +137,11 @@ public void Scan(ICollection<IpV4Address> addresses)
                     Thread.Sleep(Config.ScanReplyTimeout);
                     _tokenSource.Cancel();
 
-                    foreach (var host in discoveredHosts)
-                        host.HostName = NetworkUtilities.GetHostNameByIp(host.IpAddress);
+                    if(resolveHostnames)
+                    {
+                        foreach (var host in discoveredHosts)
+                            host.HostName = NetworkUtilities.GetHostNameByIp(host.IpAddress);
+                    }
 
                     OnScanFinished(new ScanFinishedEventArgs(discoveredHosts));
                 }