Add extensions for Socket and TcpClient

Lib/Network/SocketExtensions.cs

@@ -0,0 +1,71 @@
+/// @file
+/// @copyright  Copyright (c) 2026 SafeTwice S.L. All rights reserved.
+/// @license    See LICENSE.txt
+
+using System;
+using System.Diagnostics;
+using System.Net;
+using System.Net.Sockets;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace Utilities.DotNet.Network
+{
+    /// <summary>
+    /// Utility class providing extension methods for the <see cref="Socket"/> class.
+    /// </summary>
+    public static class SocketExtensions
+    {
+        //===========================================================================
+        //                            PUBLIC METHODS
+        //===========================================================================
+
+        /// <summary>
+        /// Establishes a connection to a remote host.
+        /// </summary>
+        /// <param name="socket">Socket used to establish connection.</param>
+        /// <param name="address">The IPAddress of the remote host to connect to.</param>
+        /// <param name="port">The port on the remote host to connect to.</param>
+        /// <param name="timeout">The number of milliseconds to wait for connection to be established,
+        ///                       or <see cref="Timeout.Infinite"/> to wait indefinitely.</param>
+        /// <exception cref="SocketException">An error occurred when accessing the socket.</exception>
+        /// <exception cref="System.ObjectDisposedException">The <see cref="Socket"/> has been disposed.</exception>
+        /// <exception cref="System.Security.SecurityException">A caller higher in the call stack does not have permission for the requested operation.</exception>
+        /// <exception cref="System.InvalidOperationException">The <see cref="Socket"/> has been placed in a listening state by calling <see cref="Socket.Listen(int)"/>.</exception>
+        public static void Connect( this Socket socket, IPAddress address, int port, int timeout )
+        {
+            if( timeout == Timeout.Infinite )
+            {
+                socket.Connect( address, port );
+            }
+            else
+            {
+                Task connectTask;
+
+                try
+                {
+                    connectTask = socket.ConnectAsync( address, port );
+
+                    if( !connectTask.Wait( timeout ) )
+                    {
+                        socket.Close();
+                        throw new SocketException( (int) SocketError.TimedOut );
+                    }
+                }
+                catch( AggregateException ex )
+                {
+                    socket.Close();
+                    throw ex.InnerException ?? ex;
+                }
+                catch( Exception )
+                {
+                    socket.Close();
+                    throw;
+                }
+
+                Debug.Assert( !connectTask.IsFaulted );
+                Debug.Assert( socket.Connected );
+            }
+        }
+    }
+}

Lib/Network/TcpClientExtensions.cs

@@ -0,0 +1,69 @@
+/// @file
+/// @copyright  Copyright (c) 2026 SafeTwice S.L. All rights reserved.
+/// @license    See LICENSE.txt
+
+using System;
+using System.Diagnostics;
+using System.Net;
+using System.Net.Sockets;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace Utilities.DotNet.Network
+{
+    /// <summary>
+    /// Utility class providing extension methods for the <see cref="TcpClient"/> class.
+    /// </summary>
+    public static class TcpClientExtensions
+    {
+        //===========================================================================
+        //                            PUBLIC METHODS
+        //===========================================================================
+
+        /// <summary>
+        /// Establishes a connection to a remote TCP host.
+        /// </summary>
+        /// <param name="client">TCP client used to establish connection.</param>
+        /// <param name="address">The IPAddress of the remote host to connect to.</param>
+        /// <param name="port">The port on the remote host to connect to.</param>
+        /// <param name="timeout">The number of milliseconds to wait for connection to be established,
+        ///                       or <see cref="Timeout.Infinite"/> to wait indefinitely.</param>
+        /// <exception cref="SocketException">An error occurred when accessing the socket.</exception>
+        /// <exception cref="ObjectDisposedException">The <see cref="TcpClient"/> has been disposed.</exception>
+        public static void Connect( this TcpClient client, IPAddress address, int port, int timeout )
+        {
+            if( timeout == Timeout.Infinite )
+            {
+                client.Connect( address, port );
+            }
+            else
+            {
+                Task connectTask;
+
+                try
+                {
+                    connectTask = client.ConnectAsync( address, port );
+
+                    if( !connectTask.Wait( timeout ) )
+                    {
+                        client.Close();
+                        throw new SocketException( (int) SocketError.TimedOut );
+                    }
+                }
+                catch( AggregateException ex )
+                {
+                    client.Close();
+                    throw ex.InnerException ?? ex;
+                }
+                catch( Exception )
+                {
+                    client.Close();
+                    throw;
+                }
+
+                Debug.Assert( !connectTask.IsFaulted );
+                Debug.Assert( client.Connected );
+            }
+        }
+    }
+}