New: Use native .NET socks proxy

src/NzbDrone.Common/Http/Proxy/ManagedWebProxyFactory.cs

@@ -1,9 +1,5 @@
-using System;
+using System;
-using System.Linq;
 using System.Net;
-using System.Net.Sockets;
-using com.LandonKey.SocksWebProxy;
-using com.LandonKey.SocksWebProxy.Proxy;
 using NzbDrone.Common.Cache;
 using NzbDrone.Common.Extensions;
 
@@ -33,54 +29,37 @@ namespace NzbDrone.Common.Http.Proxy
         }
 
         private IWebProxy CreateWebProxy(HttpProxySettings proxySettings)
+        {
+            var uri = GetProxyUri(proxySettings);
+
+            if (uri == null)
+            {
+                return null;
+            }
+
+            if (proxySettings.Username.IsNotNullOrWhiteSpace() && proxySettings.Password.IsNotNullOrWhiteSpace())
+            {
+                return new WebProxy(uri, proxySettings.BypassLocalAddress, proxySettings.BypassListAsArray, new NetworkCredential(proxySettings.Username, proxySettings.Password));
+            }
+            else
+            {
+                return new WebProxy(uri, proxySettings.BypassLocalAddress, proxySettings.BypassListAsArray);
+            }
+        }
+
+        private Uri GetProxyUri(HttpProxySettings proxySettings)
         {
             switch (proxySettings.Type)
             {
                 case ProxyType.Http:
-                    if (proxySettings.Username.IsNotNullOrWhiteSpace() && proxySettings.Password.IsNotNullOrWhiteSpace())
+                    return new Uri("http://" + proxySettings.Host + ":" + proxySettings.Port);
-                    {
-                        return new WebProxy(proxySettings.Host + ":" + proxySettings.Port, proxySettings.BypassLocalAddress, proxySettings.BypassListAsArray, new NetworkCredential(proxySettings.Username, proxySettings.Password));
-                    }
-                    else
-                    {
-                        return new WebProxy(proxySettings.Host + ":" + proxySettings.Port, proxySettings.BypassLocalAddress, proxySettings.BypassListAsArray);
-                    }
-
                 case ProxyType.Socks4:
-                    return new SocksWebProxy(new ProxyConfig(IPAddress.Loopback, GetNextFreePort(), GetProxyIpAddress(proxySettings.Host), proxySettings.Port, ProxyConfig.SocksVersion.Four, proxySettings.Username, proxySettings.Password), false);
+                    return new Uri("socks4://" + proxySettings.Host + ":" + proxySettings.Port);
                 case ProxyType.Socks5:
-                    return new SocksWebProxy(new ProxyConfig(IPAddress.Loopback, GetNextFreePort(), GetProxyIpAddress(proxySettings.Host), proxySettings.Port, ProxyConfig.SocksVersion.Five, proxySettings.Username, proxySettings.Password), false);
+                    return new Uri("socks5://" + proxySettings.Host + ":" + proxySettings.Port);
+                default:
+                    return null;
             }
-
-            return null;
-        }
-
-        private static IPAddress GetProxyIpAddress(string host)
-        {
-            IPAddress ipAddress;
-            if (!IPAddress.TryParse(host, out ipAddress))
-            {
-                try
-                {
-                    ipAddress = Dns.GetHostEntry(host).AddressList.OrderByDescending(a => a.AddressFamily == AddressFamily.InterNetwork).First();
-                }
-                catch (Exception e)
-                {
-                    throw new InvalidOperationException(string.Format("Unable to resolve proxy hostname '{0}' to a valid IP address.", host), e);
-                }
-            }
-
-            return ipAddress;
-        }
-
-        private static int GetNextFreePort()
-        {
-            var listener = new TcpListener(IPAddress.Loopback, 0);
-            listener.Start();
-            var port = ((IPEndPoint)listener.LocalEndpoint).Port;
-            listener.Stop();
-
-            return port;
         }
     }
 }

src/NzbDrone.Common/Prowlarr.Common.csproj

@@ -4,7 +4,6 @@
     <DefineConstants Condition="'$(RuntimeIdentifier)' == 'linux-musl-x64' or '$(RuntimeIdentifier)' == 'linux-musl-arm64'">ISMUSL</DefineConstants>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="DotNet4.SocksProxy" Version="1.4.0.1" />
     <PackageReference Include="DryIoc.dll" Version="4.8.1" />
     <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="6.0.0" />
     <PackageReference Include="NLog.Extensions.Logging" Version="1.7.2" />

src/NzbDrone.Core/IndexerProxies/Socks4/Socks4.cs

@@ -1,9 +1,5 @@
 using System;
-using System.Linq;
 using System.Net;
-using System.Net.Sockets;
-using com.LandonKey.SocksWebProxy;
-using com.LandonKey.SocksWebProxy.Proxy;
 using NLog;
 using NzbDrone.Common.Cloud;
 using NzbDrone.Common.Extensions;
@@ -22,13 +18,20 @@ namespace NzbDrone.Core.IndexerProxies.Socks4
         public override string Name => "Socks4";
         public override HttpRequest PreRequest(HttpRequest request)
         {
+            var uri = GetProxyUri(Settings);
+
+            if (uri == null)
+            {
+                return null;
+            }
+
             if (Settings.Username.IsNotNullOrWhiteSpace() && Settings.Password.IsNotNullOrWhiteSpace())
             {
-                request.Proxy = new SocksWebProxy(new ProxyConfig(IPAddress.Loopback, GetNextFreePort(), GetProxyIpAddress(Settings.Host), Settings.Port, ProxyConfig.SocksVersion.Four, Settings.Username, Settings.Password), false);
+                request.Proxy = new WebProxy(uri, false, null, new NetworkCredential(Settings.Username, Settings.Password));
             }
             else
             {
-                request.Proxy = new SocksWebProxy(new ProxyConfig(IPAddress.Loopback, GetNextFreePort(), GetProxyIpAddress(Settings.Host), Settings.Port, ProxyConfig.SocksVersion.Four), false);
+                request.Proxy = new WebProxy(uri);
             }
 
             _logger.Debug("Applying Socks4 Proxy {0} to request {1}", Name, request.Url);
@@ -36,32 +39,9 @@ namespace NzbDrone.Core.IndexerProxies.Socks4
             return request;
         }
 
-        private static int GetNextFreePort()
+        private Uri GetProxyUri(Socks4Settings proxySettings)
         {
-            var listener = new TcpListener(IPAddress.Loopback, 0);
+            return new Uri("socks4://" + proxySettings.Host + ":" + proxySettings.Port);
-            listener.Start();
-            var port = ((IPEndPoint)listener.LocalEndpoint).Port;
-            listener.Stop();
-
-            return port;
-        }
-
-        private static IPAddress GetProxyIpAddress(string host)
-        {
-            IPAddress ipAddress;
-            if (!IPAddress.TryParse(host, out ipAddress))
-            {
-                try
-                {
-                    ipAddress = Dns.GetHostEntry(host).AddressList.OrderByDescending(a => a.AddressFamily == AddressFamily.InterNetwork).First();
-                }
-                catch (Exception e)
-                {
-                    throw new InvalidOperationException(string.Format("Unable to resolve proxy hostname '{0}' to a valid IP address.", host), e);
-                }
-            }
-
-            return ipAddress;
         }
     }
 }

src/NzbDrone.Core/IndexerProxies/Socks5/Socks5.cs

@@ -1,9 +1,5 @@
 using System;
-using System.Linq;
 using System.Net;
-using System.Net.Sockets;
-using com.LandonKey.SocksWebProxy;
-using com.LandonKey.SocksWebProxy.Proxy;
 using NLog;
 using NzbDrone.Common.Cloud;
 using NzbDrone.Common.Extensions;
@@ -23,13 +19,20 @@ namespace NzbDrone.Core.IndexerProxies.Socks5
 
         public override HttpRequest PreRequest(HttpRequest request)
         {
+            var uri = GetProxyUri(Settings);
+
+            if (uri == null)
+            {
+                return null;
+            }
+
             if (Settings.Username.IsNotNullOrWhiteSpace() && Settings.Password.IsNotNullOrWhiteSpace())
             {
-                request.Proxy = new SocksWebProxy(new ProxyConfig(IPAddress.Loopback, GetNextFreePort(), GetProxyIpAddress(Settings.Host), Settings.Port, ProxyConfig.SocksVersion.Five, Settings.Username, Settings.Password), false);
+                request.Proxy = new WebProxy(uri, false, null, new NetworkCredential(Settings.Username, Settings.Password));
             }
             else
             {
-                request.Proxy = new SocksWebProxy(new ProxyConfig(IPAddress.Loopback, GetNextFreePort(), GetProxyIpAddress(Settings.Host), Settings.Port, ProxyConfig.SocksVersion.Five), false);
+                request.Proxy = new WebProxy(uri);
             }
 
             _logger.Debug("Applying Socks5 Proxy {0} to request {1}", Name, request.Url);
@@ -37,32 +40,9 @@ namespace NzbDrone.Core.IndexerProxies.Socks5
             return request;
         }
 
-        private static int GetNextFreePort()
+        private Uri GetProxyUri(Socks5Settings proxySettings)
         {
-            var listener = new TcpListener(IPAddress.Loopback, 0);
+            return new Uri("socks5://" + proxySettings.Host + ":" + proxySettings.Port);
-            listener.Start();
-            var port = ((IPEndPoint)listener.LocalEndpoint).Port;
-            listener.Stop();
-
-            return port;
-        }
-
-        private static IPAddress GetProxyIpAddress(string host)
-        {
-            IPAddress ipAddress;
-            if (!IPAddress.TryParse(host, out ipAddress))
-            {
-                try
-                {
-                    ipAddress = Dns.GetHostEntry(host).AddressList.OrderByDescending(a => a.AddressFamily == AddressFamily.InterNetwork).First();
-                }
-                catch (Exception e)
-                {
-                    throw new InvalidOperationException(string.Format("Unable to resolve proxy hostname '{0}' to a valid IP address.", host), e);
-                }
-            }
-
-            return ipAddress;
         }
     }
 }